Patent design of a steel drum hydraulic testing machine

Method for manufacturing hydraulic test

[Patent Abstract] The utility model discloses a hydraulic testing machine, which comprises a first-stage pressure regulating system and a secondary pressure regulating system. The two-stage system performs pressure regulation through a controller, and the first-stage pressure control system includes an inlet valve and a water pump. The first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the first flow control valve, the second flow control valve, and the secondary pressure control system include an overflow valve, a diverter valve, a manual ball valve, a drain solenoid valve, and a pressure sensor. The hydraulic testing machine of the utility model can realize stable pressure supply, high test precision and more accurate detection result, and in the test process, if the test container is deformed under pressure, the hydraulic testing machine of the utility model can perform the same Pressure compensation makes the test results more reliable.

[patent description] a hydraulic testing machine

[Technical Field]

[0001] The utility model belongs to the field of pressure vessel pressure test, and in particular to a hydraulic testing machine.

【Background technique】

[0002] According to the "Proposal on the Transport of Dangerous Goods - Model Regulations", "International Maritime Dangerous Goods Code", GB19269-2009 "Safety Code for Inspection of Packaging of Dangerous Goods by Road", GB 19270-2009 "Packaging Inspection of Dangerous Goods for Waterway Transportation" Safety Regulations, GB 19359-2009 "Safety Regulations for Inspection of Packaging of Dangerous Goods by Railways", GB 19433-2009 "Safety Regulations for Inspection of Packaging of Dangerous Goods by Air", GB 18191-2008 "Plastic Barrels", GB 19160-2008 "Plastic Cans" , GB/T 325.1-2008 "Test container steel drum Part I: General technical requirements" standard stipulates that hydraulic testing of metal containers, plastic drums (tanks), etc., which are intended to contain liquid dangerous goods, is required to test plastics, Whether the performance of metal container packaging meets the standard requirements, thus ensuring the safety of transportation of chemical products, especially dangerous chemical products.

[0003] However, the existing testing equipment has the following problems: 1. There is no ready-made test instrument in the country, and the manufacturer generally uses the water pump to supply pressure test, and manually controls the internal hydraulic pressure of the test container through a pressure gauge display. Its accuracy and pressure values ​​are unstable, affecting the test results. 2. In the actual operation, the test container is deformed after being pressed, and the pressure can not be easily compensated by the water pump. The hydraulic pressure in the test container during the test cannot meet the test requirements. It is difficult to control the accuracy of the pressure value and the speed of the injection pressure in the pressure control. Moreover, due to the different appearance of the test products, the set of equipment is designed with special fixtures to ensure the sealing of the injection port during injection.

[Summary of the Invention]

[0004] The task of the utility model is to solve the problem that the existing hydraulic test instrument has low test precision, the result is unreliable, and can not meet the requirements of the test, and provides a hydraulic test machine with high test precision and stable pressure value. The test results are accurate and reliable.

[0005] The technical scheme adopted by the utility model is: a hydraulic testing machine, including a first-stage pressure regulating system and a secondary pressure regulating system, and the two-stage system performs pressure regulation through a controller.

[0006] The primary pressure control system includes an inlet valve, a water pump, a first solenoid valve, a second solenoid valve, a third solenoid valve, a first flow control valve, a second flow control valve, a water tank, and the secondary pressure control system includes Relief valve, diverter valve, manual ball valve, drain solenoid valve, pressure sensor,

[0007] The water outlet of the inlet valve is divided into two paths, one of which is connected to one end of the first solenoid valve, and the other is connected to the water inlet of the water pump;

[0008] after the other end of the first electromagnetic valve is connected with the water outlet of the water pump, the two paths are divided into two paths, one of which is sequentially connected with the first flow control valve and the second electromagnetic valve, and the other is sequentially connected with the second flow control valve and the third a solenoid valve is connected, and the second solenoid valve and the third solenoid valve are also connected to the water inlet of the water tank;

[0009] The water outlet of the water tank is disposed at the bottom end of the water tank, and is divided into two paths, one of which is connected with an overflow valve and a diverter valve in turn, and the other is connected with a drainage solenoid valve, and the overflow outlet end of the overflow valve is connected and drained a drain pipe connected to the solenoid valve; a pressure sensor is arranged on the front end pipe adjacent to the diverter valve;

[0010] a manual ball valve is connected to the outlet end branch of the diverter valve, and the other end of the manual ball valve is connected to the test vessel through a clamping tool; the connection between the above components is performed through the connecting pipe;

[0011] The pressure sensor is configured to receive the pressure signal and transmit the signal to the controller, the controller processes the pressure signal, and controls the first solenoid valve, the second solenoid valve, the third solenoid valve, the diverter valve, and the drain solenoid valve Opening and closing.

[0012] When the pump is pumping water, the water will have a certain impulse in the pipeline, which will lead to pressure instability. The first pressure control system can buffer the water in the pipeline by setting the water tank, and the overflow in the secondary pressure control system. The flow valve can further function as a voltage regulator, so the hydraulic testing machine of the present invention can stably control the pressure.

[0013] When the test container is deformed, the internal pressure changes, the pressure sensor receives the pressure change signal and transmits it to the controller, and the controller controls the second solenoid valve or the third solenoid valve to open for testing. The container replenishes the pressure and compensates for the pressure.

[0014] Preferably, the hydraulic testing machine further comprises a chassis, the manual ball valve and the test container are disposed outside the chassis, and other components are located in the chassis, and the adjustment knobs of the first flow control valve and the second flow control valve are disposed on the chassis.

[0015] Preferably, the controller comprises an expansion board and an industrial computer, the expansion board receives the pressure analog signal, and converts it into a digital signal through an A/D conversion card, and the industrial control computer controls the first electromagnetic valve and the second electromagnetic The valve, the third solenoid valve, the diverter valve, and the drain solenoid valve are opened and closed to store and display test information.

[0016] Preferably, the clamping tool comprises a hollow screw, a fixed end provided at one end of the hollow screw, and a middle hole in the middle of the fixed end is connected with the through hole of the hollow screw, and the hollow screw is fixed from the fixed end The outer sleeve is sleeved, the hand-held portion and the screw-on fixing member. The fixed end can fix the tightening tool on the container, and the externally disposed gasket acts as a seal to prevent water from leaking out of the container, and the hand-held portion facilitates the overall installation and disassembly of the clamping tool.

[0017] More preferably, the intermediate portion of the fixed end is a rectangular plate member, and the two ends are curved plates projecting outward along the short sides of the two sides of the rectangular plate member. Such a structure is more advantageous for inserting the fixed end into the through hole of the container with respect to the circular shape or other shapes, and the curved plate member protruding from both sides is less likely to wear the container wall when inserted, and can be fixed after being inserted into the container. On the wall of the container.

More preferably, the hand-held portion includes a socket portion that is threadedly coupled to the hollow screw and a handle that is fixed to the socket portion and extends outwardly in the direction of the vertical hollow screw.

More preferably, the screw fastening component comprises two nuts threadedly coupled to the hollow screw, a hollow cap and a step screw for easy hand-held, the step screwing being provided between the two nuts, wherein A nut abuts the hand-held portion, and the hollow cap is disposed at an end of the hollow screw away from the fixed end and abuts against the other nut. The arrangement of the step screwing portion makes the installation and disassembly of the clamping tool more convenient, and the nut provided at both ends serves to further tighten. In order to prevent contact wear between the hard parts, a spacer is provided between the nut and the adjacent part.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The hydraulic testing machine of the utility model adopts a secondary pressure regulation system, which can achieve stable pressure supply, high test precision and more accurate detection results.

[0022] 2. In the test process, if the test container is deformed under pressure, the hydraulic test machine of the present invention can perform pressure compensation on the test, thereby making the test result more reliable.

[0023] 3. The hydraulic testing machine of the present invention can perform hydraulic testing on two or more test containers at the same time, thereby improving the test efficiency, and the tests of several test containers do not affect each other. If one of them leaks, it should not be other. Test the test container.

[Patent Drawing]

Drawing method of hydraulic test

BRIEF DESCRIPTION OF THE DRAWINGS [0024] FIG. 1 is a schematic structural view of a hydraulic testing machine;

2 is a schematic structural view of a clamping tool;

3 is a schematic structural view of a fixed end of a clamping tool.

【Detailed ways】

[0027] A hydraulic testing machine as shown in FIG. 1 includes a primary pressure regulating system and a secondary pressure regulating system, and the two-stage system performs pressure regulation through a controller.

[0028] The primary pressure control system includes an inlet valve 1, a water pump 2, a first solenoid valve 3, a second solenoid valve 4, a third solenoid valve 5, a first flow control valve 6, a second flow control valve 7, and a water tank. 8. The secondary pressure control system includes an overflow valve 10, a diverter valve 12, a manual ball valve 13, a drain solenoid valve 9, and a pressure sensor 11,

[0029] The water outlet of the inlet valve I is divided into two paths, one of which is connected to one end of the first electromagnetic valve 3, and the other is connected to the water inlet of the water pump 2;

[0030] After the other end of the first electromagnetic valve 3 is connected to the water outlet of the water pump 2, two paths are formed, one of which is sequentially connected with the first flow control valve 6 and the second electromagnetic valve 4, and the other is sequentially and the second flow control is performed. The valve 7 and the third electromagnetic valve 5 are connected, and the second electromagnetic valve 4 and the third electromagnetic valve 5 are also connected to the water inlet of the water tank 8;

[0031] The water outlet of the water tank 8 is disposed at the bottom end of the water tank 8, and is divided into two paths, one of which is connected with an overflow valve 10 and a diverter valve 12 in turn, and the other is connected with a drain solenoid valve 9, and the overflow of the overflow valve 10 The outlet end is connected to the drain pipe connected to the drain solenoid valve 9; the front end pipeline adjacent to the diverter valve 12 is provided with a pressure sensor 11;

[0032] A manual ball valve 13 is connected to the outlet end branch of the diverter valve 12, and the other end of the manual ball valve 13 is connected to the test vessel by the clamping tool 14; the connection between the above components is performed through the connecting pipe; the manual ball valve 13 and The clamping tools 14 are connected by a hose.

[0033] The pressure sensor 11 is configured to receive a pressure signal and transmit the signal to a controller that processes the pressure signal and controls the first solenoid valve 3, the second solenoid valve 4, the third solenoid valve 5, and the diverter valve 12. Opening and closing of the drain solenoid valve 9.

[0034] The hydraulic testing machine further includes a chassis 15, the manual ball valve 13 and the test container are disposed outside the chassis 15, and other components are located in the chassis 15, and the chassis 15 is provided with adjustment of the first flow control valve 6 and the second flow control valve 7. Knob.

[0035] The controller includes an expansion board and an industrial control computer, the expansion board receives the pressure analog signal, and converts it into a digital signal through the A/D conversion card, and the industrial control computer controls the first electromagnetic valve 3, the second electromagnetic valve 4, The three solenoid valves 5, the diverter valve 12, and the drain solenoid valve 9 are opened and closed to store and display test information.

The clamping tool 14 (shown in FIG. 2) includes a hollow screw 149, a fixed end 141 disposed at one end of the hollow screw 149, and a central hole 1413 communicating with the through hole of the hollow screw 149 in the middle of the fixed end 141. The hollow screw 149 is sleeved with a spacer 142, a hand portion 143 and a screw fastening member in this order from the fixed end 141. The hand portion 143 includes a socket portion 1431 that is screw-fitted to the screw 149 and a handle 1432 that is fixed to the socket portion 1431. The middle of the fixed end 141 (shown in FIG. 3) is a rectangular plate member 1411, and the two ends are outwardly projecting the curved plate member 1412 along the short sides of the rectangular plate members.

[0037] The screwing fastening member includes a nut 145 that mates with the external thread of the hollow screw 149, a nut 147, a hollow cap 148, and a step screw 146 that cooperates with the external thread of the hollow screw 149 and facilitates hand-holding. The screwing portion 146 is disposed between the nut 145 and the nut 147, and the nut 145 abuts against the hand portion 143, and the hollow cap 148 is disposed at the end of the hollow screw 149 and abuts against the nut 147.

[0038] In order to avoid contact wear between the hard parts, a spacer may be disposed between the adjacent two components, such as a spacer 144a, a nut 147 and a hollow cap 148 may be disposed between the nut 145 and the hand portion 143. A spacer 144b may be disposed between.

[0039] The workflow of the hydraulic testing machine is:

[0040] A properly sized hole is formed in the sealed test container, the fixed end 141 of the clamping tool 14 is inserted into the hole, the handle 1432 of the hand held portion 143 is handed, the fastening member is screwed, and the clamping tool 14 is tightly closed. Fixed to the test container; the water inlet hose is fixed to the clamping tool 14;

[0041] The opening sizes of the first flow control valve 6 and the second flow control valve 7 are set according to actual needs. Usually, the opening of one of the flow control valves is large, so that the system can reach the set pressure value in a short time, and A flow control valve has a small opening to facilitate fine adjustment of small pressure changes;

[0042] According to actual needs, the manual ball valve 13 is screwed at an angle to control the water flow rate into the test vessel;

[0043] The water inlet valve 1 is opened, the first electromagnetic valve 3 is closed, and the water pumped by the water pump 2 enters the water tank 8 through the first flow control valve 6, the second electromagnetic valve 4, the second flow control valve 7, and the third electromagnetic valve 5. The water of the water tank 8 enters the test container through the overflow valve 10, the diverter valve 12 and the respective manual ball valves 13; when the pressure value measured by the pressure sensor 11 reaches the set pressure, the second electromagnetic valve 4 and the third electromagnetic valve 5 are closed. When the pressure value measured by the pressure sensor 11 is lower than the set pressure, the second electromagnetic valve 4 or the third electromagnetic valve 5 is opened to realize the pressure compensation of the system, so that the pressure value reaches the set value;

[0044] After the test is completed, the drain solenoid valve 9 is opened to perform a pressure relief operation.

【Rights request】

A hydraulic testing machine, comprising: a primary pressure regulating system and a secondary pressure regulating system, wherein the two-stage system performs pressure regulation through a controller, and the primary pressure control system comprises an inlet valve, a water pump, and a first electromagnetic Valve, second solenoid valve, third solenoid valve, first flow control valve, second flow control valve, water tank, secondary pressure control system including overflow valve, diverter valve, manual ball valve, drain solenoid valve, pressure sensor, advance The water outlet of the water valve is divided into two paths, one of which is connected to one end of the first electromagnetic valve, and the other is connected to the water inlet of the water pump; the other end of the first electromagnetic valve is connected with the water outlet of the water pump, and is divided into two paths, one of which is The first flow control valve and the second electromagnetic valve are connected in sequence, and the other is connected to the second flow control valve and the third electromagnetic valve in sequence, and the second electromagnetic valve and the third electromagnetic valve are also connected to the water inlet of the water tank; The nozzle is located at the bottom end of the water tank and is divided into two paths. One of them is connected with an overflow valve and a diverter valve in turn, and the other is connected with a drain solenoid valve. The overflow outlet end of the overflow valve is connected with a drain pipe connected to the drain solenoid valve; a pressure sensor is arranged on the front end pipeline adjacent to the diverter valve; a manual ball valve is connected to the outlet end branch of the diverter valve, and the other end of the manual ball valve is connected to the test vessel through the clamping tool; The connection between the components is performed through a connecting pipe; the pressure sensor is used to receive the pressure signal, and the signal is transmitted to the controller, the controller processes the pressure signal, and controls the first solenoid valve, the second solenoid valve, and the third solenoid valve , the opening and closing of the diverter valve and the drain solenoid valve.

2. The hydraulic testing machine according to claim 1, wherein the hydraulic testing machine further comprises a chassis, the manual ball valve and the test container are disposed outside the chassis, and other components are located in the chassis, and the first flow control is provided on the chassis. Adjustment knob for valve and second flow control valve.

3. The hydraulic testing machine according to claim 1, wherein the controller comprises an expansion board and an industrial control computer, and the expansion board receives the pressure analog signal and converts it into a digital signal through an A/D conversion card. The industrial computer controls the opening and closing of the first solenoid valve, the second solenoid valve, the third solenoid valve, the diverter valve, and the drain solenoid valve, and stores and displays the test information.

The hydraulic testing machine according to any one of claims 1 to 3, wherein the clamping tool comprises a hollow screw, a fixed end provided at one end of the hollow screw, and the middle of the fixed end is opened. The middle hole of the hollow screw through which the through hole communicates, the gasket, the hand piece and the screw fixing component are sleeved from the fixed end to the hollow screw.

The hydraulic testing machine according to claim 4, wherein the intermediate portion of the fixed end is a rectangular plate member, and the two ends are curved plates extending outward along the short sides of the rectangular plate member. Pieces.

6. The hydraulic testing machine according to claim 4, wherein the hand-held portion comprises a sleeve portion that is threadedly coupled to the hollow screw and a handle that is fixed to the socket portion and extends outwardly in the direction of the vertical hollow screw.

The hydraulic testing machine according to claim 4, wherein the screw fastening member comprises two nuts threadedly coupled to the hollow screw, a hollow cap, and a step screw for facilitating the hand-held step, the step screwing The portion is disposed between the two nuts, one of the nuts abuts the hand-held portion, and the hollow cap is disposed at an end of the hollow screw away from the fixed end and abuts against the other nut.

The hydraulic testing machine according to claim 7, wherein a spacer is provided between the nut and an adjacent member.

[Document No.] G01N3/12GK203519429SQ201320695752

[Public Date] April 2, 2014 Application Date: November 6, 2013 Priority Date: November 6, 2013

[Inventor] Xiang Xing Lin, Xu Zhiqin, Zhou Yinghong Applicant: Inspection and Quarantine Technology Center of Guangdong Entry-Exit Inspection and Quarantine Bureau