CN108801575B

CN108801575B - Hydraulic drive type clamping special-shaped valve bursting pressure testing method

Info

Publication number: CN108801575B
Application number: CN201810405666.3A
Authority: CN
Inventors: 梁桂海; 李祚; 王亮; 曹海平; 邢金涛; 南斌; 马维强; 杜立剑; 李东东; 吕文成; 张振华
Original assignee: Technical Monitoring Center of PetroChina Changqing Oilfield Co
Current assignee: Technical Monitoring Center of PetroChina Changqing Oilfield Co
Priority date: 2018-04-29
Filing date: 2018-04-29
Publication date: 2020-03-24
Anticipated expiration: 2038-04-29
Also published as: CN108801575A

Abstract

The invention discloses a hydraulic drive type clamping special-shaped valve burst pressure testing method, which adopts a testing system comprising a hydraulic drive type clamping device, a quick joint, a burst pressure testing device and a monitoring device, wherein the burst pressure testing device comprises a water supply tank, a liquid supply pipe, a pressurizing mechanism and a pressure relief mechanism; the method comprises the following steps: firstly, preparing before testing; secondly, defining and determining a clamped area of the special-shaped valve; thirdly, determining the number of clamping rods in contact with the clamped area; fourthly, clamping the special-shaped valve and connecting the quick connector; fifthly, judging whether the clamping of the detected special-shaped valve is stable; sixthly, testing the bursting pressure of the special-shaped valve; and seventhly, disassembling the special-shaped valve. The special-shaped valve clamping device is reasonable in design, simple and convenient to operate, stable in clamping of the special-shaped valve, capable of enabling the special-shaped valve not to deform and capable of guaranteeing accurate testing of the bursting pressure of the special-shaped valve, and high in practicability.

Description

Hydraulic drive type clamping special-shaped valve bursting pressure testing method

Technical Field

The invention belongs to the technical field of valve test tests, and particularly relates to a hydraulic drive type clamping method for testing the burst pressure of a special-shaped valve.

Background

The special-shaped valve is a general name of a small-diameter valve with a complex shape, the nominal diameter of the special-shaped valve is DN 3-DN 40, and the nominal pressure of the special-shaped valve is 1.6 MPa-42.0 MPa. The special-shaped valve is an indispensable important part in the production and construction of the oil and gas field, the explosion pressure of the special-shaped valve can be better detected in the production and construction process of the severe oil and gas field, the explosion pressure of various special-shaped valves can be obtained, the application environment of the special-shaped valve can meet the self requirement of the special-shaped valve, and the ground engineering construction management of the oil and gas field can be improved. In the process of testing the bursting pressure of the special-shaped valve, if the special-shaped valve is not clamped and fixed, the special-shaped valve has the safety risk of flying out to hurt people in the test; and the special-shaped valve is tightly screwed by hands if the special-shaped valve is not clamped and fixed, the special-shaped valve is opened or closed, so that the special-shaped valve is very laborious and has huge labor intensity, and the testing efficiency is seriously influenced. In addition, the burst pressure of the special-shaped valve is closely related to the mechanism, the size and the use condition of the special-shaped valve, and the whole structure of the special-shaped valve is ensured to be complete and not deformed during the burst pressure test of the special-shaped valve.

However, at present, a special testing device capable of clamping and testing the burst pressure of the special-shaped valve is lacked, and the existing clamping device has the defects and shortcomings of extrusion deformation, low universality, inconvenient operation and the like of the clamped valve.

Disclosure of Invention

The invention aims to solve the technical problem of providing a hydraulic drive type clamping special-shaped valve burst pressure test system aiming at the defects in the prior art, which has the advantages of reasonable design, simple and convenient operation, stable clamping of the special-shaped valve, no deformation of the special-shaped valve, accurate burst pressure test of the special-shaped valve and strong practicability.

In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a heterotypic valve burst pressure test system of hydraulic drive formula centre gripping which characterized in that: the device comprises a hydraulic clamping device for clamping a tested special-shaped valve, a quick connector connected with the tested special-shaped valve, a bursting pressure testing device for testing the bursting pressure of the tested special-shaped valve and a monitoring device for monitoring the hydraulic clamping device and the bursting pressure testing device, wherein the bursting pressure testing device comprises a liquid supply box, a liquid supply pipe connected with the liquid supply box, a pressurizing mechanism arranged on the liquid supply pipe and a pressure relief mechanism connected with the outlet end of the liquid supply pipe, the pressurizing mechanism comprises a gas supply mechanism, an oil pump and a return pressure regulating valve for regulating the driving gas pressure output by the gas supply mechanism, a first pneumatic pump and a second pneumatic pump for pressurizing the hydraulic pressure in the liquid supply pipe and a pneumatic pump control assembly for controlling the first pneumatic pump and the second pneumatic pump, and the pneumatic pump control assembly comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve and a fourth electromagnetic valve, wherein the first electromagnetic, The pressure relief mechanism comprises a pressure relief pipe connected with the outlet end of the liquid supply pipe, a normally open pneumatic control valve arranged on the pressure relief pipe and a fifth electromagnetic valve for controlling the normally open pneumatic control valve;

the hydraulic clamping device comprises a hydraulic clamping mechanism for clamping the tested special-shaped valve, the hydraulic clamping mechanism comprises two symmetrically arranged hydraulic cylinders and two groups of clamping assemblies respectively arranged on the two hydraulic cylinders, each group of clamping assemblies comprises a plurality of clamping rods, one ends of the clamping rods can be contracted or extended out of the hydraulic cylinders, the clamping rods are arranged in a plurality of rows and columns, the hydraulic cylinders are connected with a hydraulic oil tank through oil supply pipes, and oil pumps, sixth electromagnetic valves and hydraulic locks are arranged on the oil supply pipes;

the monitoring device comprises a microcontroller, a parameter setting unit and an alarm, wherein the parameter setting unit and the alarm are respectively connected with the microcontroller, the input end of the microcontroller is connected with a timer, a clamping force detection unit, a first pressure detection unit for detecting the liquid supply pressure of the hydraulic cylinder, a second pressure detection unit for detecting the pressure of the outlet end of the liquid supply pipe, a first liquid level detection unit for detecting the liquid level of the liquid supply tank and a second liquid level detection unit for detecting the liquid level of the hydraulic oil tank, the output end of the microcontroller is connected with a first digital display meter, a second digital display meter and an alarm, and the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the sixth electromagnetic valve, the fifth electromagnetic valve, the oil pump and the return pressure regulating valve are controlled by the microcontroller.

The oil supply pipe is provided with a hydraulic oil filter, a first stop valve, a first mechanical pressure gauge, a safety valve and an oil supply one-way valve, and the first pressure detection unit and the sixth electromagnetic valve are positioned on the oil supply pipe;

the liquid supply pipe is sequentially provided with a second stop valve, a water supply filter and a second mechanical pressure gauge along the liquid flowing direction, and the fifth electromagnetic valve is positioned on a gas supply pipeline for supplying gas to the gas supply mechanism through a normally open gas control valve;

the air supply mechanism comprises a compressed air interface connected with a compressed air source, a pressurizing air pipe connected with the compressed air interface, a compressed air filter and a first one-way valve which are arranged on the pressurizing air pipe, a first branch air pipe, a second branch air pipe and a third branch air pipe are arranged at the outlet of the pressurizing air pipe, the air pump proportion regulating valve is arranged on the first branch air pipe, the first branch air pipe is connected with the air inlet of the first pneumatic pump through a first air inlet pipe, the first electromagnetic valve is arranged on the first air inlet pipe, the first branch air pipe is connected with the air inlet of the second pneumatic pump through a second air inlet pipe, the third electromagnetic valve is arranged on the second air inlet pipe, the second branch air pipe is connected with the air outlet of the first pneumatic pump through a first return air pipe, and the second branch air pipe is connected with the air outlet of the second pneumatic pump through a second return air pipe, the second electromagnetic valve is positioned on the first return air pipe, the fourth electromagnetic valve is positioned on the second return air pipe, the return pressure regulating valve is positioned on the second branch air pipe, the third branch air pipe supplies air for the first electromagnetic valve, the third electromagnetic valve and the fifth electromagnetic valve respectively, and the third branch air pipe is provided with a second one-way valve;

and the pressure relief pipe is provided with a pressure relief filter.

The hydraulic drive type clamping abnormal valve bursting pressure test system is characterized in that: the liquid supply tank is provided with a liquid inlet pipe, the liquid inlet pipe is provided with a seventh electromagnetic valve, the bottom of the liquid supply tank is provided with a first sewage discharge pipe and a first sewage discharge valve arranged on the first sewage discharge pipe, the first liquid level detection unit is positioned in the liquid supply tank, and the seventh electromagnetic valve is controlled by a microcontroller;

an oil inlet pipe is arranged on the hydraulic oil tank, an eighth electromagnetic valve is arranged on the oil inlet pipe, a second blowdown oil pipe and a second blowdown valve arranged on the second blowdown oil pipe are arranged at the bottom of the oil inlet pipe, and the second liquid level detection unit is located in the hydraulic oil tank;

the first solenoid valve and the third solenoid valve are both external pilot-operated solenoid valves, and the second solenoid valve and the fourth solenoid valve are both internal pilot-operated solenoid valves.

The first pneumatic pump has a pressure ratio less than a pressure ratio of the second pneumatic pump.

Meanwhile, the invention also discloses a method for testing the burst pressure of the hydraulically-driven clamped special-shaped valve, which has the advantages of simple steps, reasonable design, convenience in realization and good use effect, and is characterized in that: the method comprises the following steps:

step one, preparation work before testing:

step 101, checking a burst pressure testing device: checking the hydraulic clamping device and the pipeline of the burst pressure testing device, determining that the hydraulic clamping device and the pipeline of the burst pressure testing device are normal, electrifying to initialize the hydraulic clamping device, the burst pressure testing device and the monitoring device, and determining that all parts of the hydraulic clamping device, the burst pressure testing device and the monitoring device are normal;

step 102, connecting a compressed air source and adding a test solution: connecting a 0.7MPa compressed air source with the hydraulic oil tank, connecting a liquid supply source with the liquid supply tank, adding a test solution into the liquid supply tank until the liquid level value detected by the first liquid level detection unit meets a preset liquid level set value, connecting the oil supply source with the hydraulic oil tank, and adding hydraulic oil into the hydraulic oil tank until the liquid level value detected by the second liquid level detection unit meets the preset hydraulic oil level set value;

step two, defining and determining the clamped area of the special-shaped valve:

step 201, defining a special-shaped valve structure:

the special-shaped valve comprises a straight-through valve, a different-axis valve, an angle valve and a three-way valve, wherein the straight-through valve comprises a straight-through valve a, a straight-through valve b and a straight-through valve c, the angle valve comprises an angle valve a and an angle valve b, and the three-way valve comprises a three-way valve a and a three-way valve b;

the straight-through type a valve consists of a first valve body and a first valve handle arranged on the first valve body, the central line of the inlet of the first valve body is superposed with the central line of the outlet of the first valve body, the first valve body is provided with two straight-through a planes, the two straight-through a planes are opposite, and the first valve handle is provided with a first hand wheel;

the straight-through type b valve consists of a second valve body, a second valve handle arranged on the second valve body and a sewage discharge part arranged on the second valve body, wherein the central line of the inlet of the second valve body is coincided with the central line of the outlet of the second valve body, the second valve body is provided with a straight-through b plane, the second valve handle is provided with a regular polyhedron, and the second valve handle is provided with a second hand wheel;

the straight-through type c valve consists of a third valve body and a third valve handle arranged on the third valve body, the central line of the inlet of the third valve body is superposed with the central line of the outlet of the third valve body, the surface of the third valve body is an arc-shaped surface, and a third hand wheel is arranged on the third valve body;

the different-axis valve consists of a fourth valve body and two fourth valve handles arranged on the fourth valve body, the central lines of an inlet of the fourth valve body and an outlet of the fourth valve body are arranged in parallel from top to bottom, the fourth valve body is provided with two different-axis planes, the two different-axis planes are opposite, and a fourth hand wheel is arranged on the fourth valve body;

the angle type a valve consists of a fifth valve body and a fifth valve handle arranged on the fifth valve body, the central line of the inlet of the fifth valve body and the central line of the outlet of the fifth valve body are vertically arranged, the fifth valve body is provided with two angle type planes, the two angle type planes are opposite, and a fifth hand wheel is arranged on the fifth valve body;

the angle b valve consists of a sixth valve body and two sixth valve handles arranged on the sixth valve body, the center lines of the inlet of the sixth valve body and the outlet of the sixth valve body are vertically arranged, and a sixth hand wheel and an angle type arc part are arranged on the sixth valve handles;

the three-way type a valve consists of a seventh valve body and a seventh valve handle arranged on the seventh valve body, wherein an inlet of the seventh valve body and an outlet of the seventh valve body are positioned on the same plane, the seventh valve body is provided with two three-way type a planes which are opposite, and a seventh hand wheel is arranged on the seventh valve handle;

the three-way type b valve consists of an eighth valve body and an eighth valve handle arranged on the eighth valve body, the inlet of the eighth valve body and the outlet of the eighth valve body are not positioned on the same plane, the eighth valve body is provided with two three-way type b planes, the two three-way type b planes are adjacent planes, and the eighth valve handle is provided with an eighth hand wheel and a three-way arc part;

step 202, determining the clamped area of the special-shaped valve:

according to the definition of the special-shaped valve structure in the step 201, judging the special-shaped valve to be detected:

when the measured special-shaped valve belongs to a straight-through type a valve, taking two straight-through a planes as a clamped area;

when the measured special-shaped valve belongs to a straight-through type b valve, two opposite surfaces of the regular polyhedron are used as clamped areas;

when the measured special-shaped valve belongs to a straight-through type c valve, the arc-shaped surface is used as a clamped area;

when the measured special-shaped valve belongs to a different-axis valve, taking two different-axis planes as a clamped area;

when the measured special-shaped valve belongs to an angle type a valve, taking the two angle type planes as a clamped area;

when the measured special-shaped valve belongs to an angle type b valve, taking the arc-shaped surface of the angle type arc part as a clamped area;

when the detected special-shaped valve belongs to a three-way type a valve, taking the two three-way type a planes as a clamped area;

when the measured special-shaped valve belongs to a three-way valve b, taking the arc-shaped surface of the arc-shaped part of the three-way valve as a clamped area;

step three, determining the number of clamping rods in contact with the clamped area:

301, setting a hydraulic cylinder pressure test value to a microcontroller through a parameter setting unit, placing a tested special-shaped valve between two hydraulic cylinders, controlling a sixth electromagnetic valve to be electrified through the microcontroller, controlling an oil pump to work through the microcontroller to adjust hydraulic pressure in an oil supply pipe, enabling the hydraulic pressure in the oil supply pipe to be equal to the hydraulic cylinder pressure test value, introducing air into a rodless cavity of the hydraulic cylinder through the oil supply pipe, extending clamping rods in the hydraulic cylinder, and enabling N clamping rods to be in contact with one side surface of a clamped area in the tested special-shaped valve, so that the number of the clamping rods in contact with the clamped area is N, wherein N is a positive integer and is not more than the total number of the clamping rods; the other side surface of the clamped area is in contact with the N clamping rods;

step 302, controlling the sixth electromagnetic valve to be powered off through the microcontroller, controlling the oil pump to stop working through the microcontroller, and inputting the number N of clamping rods in contact with the clamped area to the microcontroller through the parameter setting unit;

step four, clamping the special-shaped valve and connecting the quick connector:

step 401, setting a hydraulic clamping force set value of the measured special-shaped valve and enabling the measured special-shaped valve to be subjected to hydraulic clamping force settingThe set value of the hydraulic clamping force for measuring the special-shaped valve is recorded as F_ys；

Step 402, the microcontroller according to the formula

Obtaining a hydraulic pressure set value P_ysThen, the hydraulic pressure set value P is set by the microcontroller_ys(ii) a Wherein D represents the diameter of each clamping bar in the hydraulic cylinder;

step 403, placing the tested special-shaped valve between the two hydraulic cylinders, controlling a sixth electromagnetic valve to be electrified through a microcontroller, controlling an oil pump to work through the microcontroller to adjust hydraulic pressure in an oil supply pipe, enabling the pressure of hydraulic oil in the oil supply pipe to be equal to a set value of hydraulic clamping force, introducing air into a rodless cavity of the hydraulic cylinder through the oil supply pipe, extending a clamping rod in the hydraulic cylinder, clamping the tested special-shaped valve, and locking a hydraulic lock;

step 404, connecting the quick connector with an inlet and an outlet of the tested special-shaped valve;

step five, judging whether the clamping of the tested special-shaped valve is stable:

step 501, in the process that the clamped area in the tested special-shaped valve is clamped, the clamping force detection unit collects the clamping force of the clamping rod when the clamped area is clamped, and the collected clamping force detection value F_cSending the data to a microcontroller;

step 502, the microcontroller performs the acquisition on the received clamping force detection values F according to the sequence of the acquisition time_cWith the set value F of the hydraulic clamping force_ysComparing, and detecting the clamping force F_cWith the set value F of the hydraulic clamping force_ysSatisfy | F_ys-F_cWhen the | is less than or equal to α, executing step 503, otherwise, executing step 504;

step 503, repeating the steps 501 to 502 until the preset clamping time of the timer is reached, which indicates that the clamping of the measured special-shaped valve is stable;

step 504, the microcontroller controls an alarm to alarm and remind, the hydraulic lock is unlocked, and the microcontroller controls the oil pump to adjust the hydraulic pressure in the oil supply pipe so as to stably clamp the tested special-shaped valve;

step six, testing the bursting pressure of the special-shaped valve:

601, controlling an oil pump and a return pressure regulating valve by a microcontroller to regulate the pressure of driving air, controlling a first electromagnetic valve and a second electromagnetic valve to be electrified in a reciprocating mode by the microcontroller, and enabling a gas supply mechanism to provide driving gas for a first pneumatic pump to start the first pneumatic pump so as to quickly fill the detected special-shaped valve with water;

step 602, the microcontroller controls the first electromagnetic valve and the second electromagnetic valve to be powered off, the second pneumatic pump stops working, the microcontroller controls the oil pump and the return pressure regulating valve to regulate the pressure of the driving air, and then the microcontroller controls the third electromagnetic valve and the fourth electromagnetic valve to be powered on in a reciprocating manner, and the air supply mechanism provides the driving air for the second pneumatic pump to start the second pneumatic pump;

step 603, the microcontroller adjusts the driving air pressure to rise through the oil pump and the return pressure regulating valve, so that the outlet pressure of the second pneumatic pump continuously rises at a constant speed, and the pressure at the outlet end of the liquid supply pipe continuously rises at a constant speed; in the process that the pressure at the outlet end of the liquid supply pipe continuously rises at a constant speed, the second pressure detection unit detects the pressure at the outlet end of the liquid supply pipe in real time and sends the detected pressure at the outlet end of the liquid supply pipe to the microcontroller;

step 604, when the pressure at the outlet end of the liquid supply pipe rises to the measured special-shaped valve and explodes, acquiring the explosion pressure of the measured special-shaped valve through a second pressure detection unit, and sending the explosion pressure of the measured special-shaped valve to a microcontroller; meanwhile, the microcontroller controls the third electromagnetic valve and the fourth electromagnetic valve to be powered off, and the second pneumatic pump stops working;

step 605, controlling the fifth electromagnetic valve to be electrified by the microcontroller, and closing the normally open pneumatic control valve to start pressure relief;

step seven, disassembling the special-shaped valve: and disassembling the quick connector, controlling the sixth electromagnetic valve to be disconnected through the microcontroller, introducing air into the rod cavity of the hydraulic cylinder, and disassembling the tested special-shaped valve after the test is finished due to the shrinkage of the clamping rod in the hydraulic cylinder.

The above method is characterized in that: before the burst pressure test of the special-shaped valve in the sixth step, the special-shaped valve to be tested needs to be operated and opened.

The above method is characterized in that: in step 404, when the measured special-shaped valve has an inlet and an outlet, connecting the first quick connector with the inlet of the measured special-shaped valve, and connecting the second quick connector with the outlet of the measured special-shaped valve;

when the tested special-shaped valve is provided with an inlet and two outlets, the first quick connector is connected with the inlet of the tested special-shaped valve, the second quick connector is connected with one outlet of the tested special-shaped valve, and the standby quick connector is connected with the other outlet of the tested special-shaped valve;

when the measured special-shaped valve is provided with two inlets and two outlets, the first quick connector is connected with one inlet of the measured special-shaped valve, the standby quick connector is connected with the other inlet of the measured special-shaped valve, and the second quick connector is connected with one outlet of the measured special-shaped valve.

The above method is characterized in that: in the step 301 and the step 403, in the process of controlling the oil pump to work and adjust the hydraulic pressure in the oil supply pipe through the microcontroller, the hydraulic pressure in the oil supply pipe is detected in real time through the first pressure detection unit, the detection result is transmitted to the microcontroller, and the microcontroller controls the first digital display meter to synchronously display, so that the hydraulic pressure displayed on the first digital display meter is equal to the pressure set value P of the hydraulic cylinder_ys。

The above method is characterized in that: before the microcontroller controls the sixth electromagnetic valve to be electrified in the step 301 and the step 403, the stop valve is operated to be opened; when the tested special-shaped valve is clamped in the step 403, when the hydraulic pressure in the oil supply pipe exceeds a safety hydraulic pressure set value, the safety valve is opened;

in the step 301 and the step 403, the hydraulic pressure in the oil supply pipe is detected in real time through the first mechanical pressure gauge, so that the hydraulic pressure in the oil supply pipe displayed by the first mechanical pressure gauge is the same as the hydraulic pressure in the oil supply pipe displayed by the first digital display gauge;

in step 603, the pressure at the outlet end of the liquid supply tube is detected in real time by a second mechanical pressure gauge, so that the pressure at the outlet end of the liquid supply tube displayed by the second mechanical pressure gauge is the same as the pressure at the outlet end of the liquid supply tube displayed by a second digital display gauge.

The method is characterized in that the value range of the deviation α between the clamping force detection value and the hydraulic clamping force set value in the step 502 is 1-2.

The above method is characterized in that: in step 504, the microcontroller controls the oil pump to adjust the hydraulic pressure in the oil supply pipe so as to stably clamp the tested special-shaped valve, and the specific process is as follows:

when | F_ys-F_cI > α and F_c＜F_ysAccording to formula F, the microcontroller_ys′＝F_ys+ α, obtaining the hydraulic clamping force adjusting value F of the detected special-shaped valve_ys', microcontroller according to formula

Obtaining a hydraulic cylinder pressure adjusting value P'_ysAnd repeating the steps 501 to 504 to enable the clamping of the tested special-shaped valve to be stable.

Compared with the prior art, the invention has the following advantages:

1. the adopted hydraulic clamping device has the advantages of simple structure, reasonable design, stable clamping force and simple and convenient manufacture.

2. The adopted hydraulic clamping device comprises two symmetrically-arranged hydraulic cylinders, and a plurality of clamping rods are arranged in the hydraulic cylinders, so that multipoint clamping of the opposite-type valve is realized, the clamping is stable, and the requirements for clamping the opposite-type valves, the different-axis valves, the angle type valves, the three-way type valves and other special-shaped valves can be met.

3. The clamping force detection unit in the adopted hydraulic clamping device detects the clamping force when the clamping rod clamps the clamped area and sends the detected clamping force to the microcontroller, so that the clamping force detected by the clamping force detection unit meets a hydraulic clamping force set value, and the clamping deformation of the special-shaped valve is effectively avoided.

4. All the clamping rods in the adopted hydraulic clamping device are mutually independent, and when a certain clamping rod fails, other clamping rods can still continue to work, so that the experimental disasters caused by the failure of the clamping rods are reduced.

5. The hydraulic lock is arranged in the adopted hydraulic clamping device, so that an oil supply path of hydraulic oil is locked, oil in the loop does not flow, and a plurality of clamping rods are used for clamping the tested special-shaped valve, so that the clamping is stable.

6. The adopted pressurizing mechanism comprises a first pneumatic pump and a second pneumatic pump, and the pressurizing mechanism pressurizes the pressure on the liquid supply pipe so as to meet the requirement of the bursting pressure.

7. A first electromagnetic valve and a second electromagnetic valve are arranged in the adopted pressurizing mechanism to control a driving air loop of the first pneumatic pump, so that air in the tested special-shaped valve is quickly evacuated at low pressure; the third electromagnetic valve and the fourth electromagnetic valve are arranged to control a driving air loop of the second pneumatic pump and pressurize the output pressure of the second pneumatic pump, so that the output pressure of the second pneumatic pump meets the requirement of a burst pressure test, the control of the first pneumatic pump and the control of the second pneumatic pump are independent of each other and do not influence each other, and the test time can be effectively reduced by adjusting the control according to needs.

8. The first electromagnetic valve and the second electromagnetic valve in the adopted pressurizing mechanism are both external pilot type electromagnetic valves, and the first electromagnetic valve and the second electromagnetic valve are started at lower pressure, can be powered on frequently, is suitable for a high-pressure environment, and is small in damage and energy-saving.

9. The monitoring device has high automation degree, is far away from the tested special-shaped valve, improves the safety of personnel, can acquire the pressure when the tested special-shaped valve is exploded in time, and ensures the accuracy of the test.

10. The hydraulic clamping special-shaped valve bursting pressure testing method is simple in steps, reasonable in design, convenient to implement, good in using effect, capable of simply, conveniently and quickly completing testing of the special-shaped valve bursting pressure, accurate in testing and safe and reliable in testing process.

11. The special-shaped valves are defined and the clamped areas of the special-shaped valves are determined, the special-shaped valves in the warehousing quality inspection every year are classified according to the similarity degree of the shape and the structure by the definition of the special-shaped valves, the classified special-shaped valves account for 90% of the warehousing quality inspection every year, can be well suitable for different special-shaped valves, have a large coverage range, and meet the classification requirement of the special-shaped valves; the special-shaped valve clamped area is determined to be two parallel planes or arc-shaped surfaces, so that the clamping mechanism is convenient to clamp and the operation of a hand wheel in the special-shaped valve in the test process of the special-shaped valve is facilitated.

12. In the clamping process of the adopted special-shaped valve, a hydraulic pressure set value is obtained through a hydraulic clamping force set value, then the sixth electromagnetic valve is controlled to be electrified through the microcontroller, and the air pressure in the oil supply pipe is adjusted to the hydraulic pressure set value through the oil pump so as to clamp the detected special-shaped valve.

13. The clamping process of the special-shaped valve is adopted, whether the clamping of the special-shaped valve to be tested is stably judged or not is judged, so that the clamping of the special-shaped valve to be tested is stable, the special-shaped valve can be stably clamped, the deformation of the special-shaped valve caused by clamping is reduced, the requirement of the clamping of the special-shaped valve in the blasting test is met, and the practicability is high.

In conclusion, the special-shaped valve clamping device is reasonable in design and simple and convenient to operate, stably clamps the special-shaped valve, enables the special-shaped valve not to deform, guarantees accurate bursting pressure testing of the special-shaped valve, and is high in practicability.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

Fig. 1 is a circuit schematic block diagram of a hydraulic drive type clamping special-shaped valve burst pressure testing system.

Fig. 2 is a schematic structural diagram of the hydraulic clamping device of the present invention.

Fig. 3 is a schematic diagram of a fluid path of the hydraulic clamping device of the present invention.

Fig. 4 is a schematic diagram of an air path and a water path of the burst pressure testing device of the invention.

Fig. 5 is a flow chart of the method for testing the burst pressure of the hydraulically-driven clamped special-shaped valve.

Fig. 6A is a schematic structural view of a straight-through a-valve according to the present invention.

Fig. 6B is a schematic structural diagram of a straight-through B-valve according to the present invention.

FIG. 6C is a schematic view of a straight-through C-valve of the present invention.

Fig. 6D is a schematic structural view of the different-axis valve of the present invention.

Fig. 6E is a schematic structural diagram of the angle a valve of the present invention.

Fig. 6F is a schematic structural diagram of the angle b valve of the present invention.

Fig. 6G is a schematic structural diagram of the three-way valve of the present invention.

Fig. 6H is a schematic structural diagram of a three-way valve b according to the present invention.

Description of reference numerals:

1-a first mechanical pressure gauge; 1-1 — a first valve body; 1-2-a first valve handle;

1-3-straight-through a plane; 2, a hydraulic cylinder; 2-1 — a second valve body;

2-second valve handle; 2-3-straight-through b plane; 2-4-a blowdown part;

2-5-regular polyhedron; 3, fixing the clamping plate; 3-1-a third valve body;

3-2-third valve handle; 3-arc surface; 4, clamping rods;

4-1-fourth valve body; 4-2-a fourth valve handle; 4-3-anisometric plane;

5, a timer; 5-1-fifth valve body; 5-2-fifth valve handle;

5-3-angled plane; 6-hydraulic oil tank; 6-1-sixth valve body;

6-2-sixth valve handle; 6-3-arc part; 7-a first stop valve;

7-1-seventh valve body; 7-2-a seventh valve handle; 7-3-plane of the three general formula a;

8-an oil pump; 8-1-eighth valve body; 8-2 — eighth valve handle;

8-3-three-way arc part; 8-4-plane of three general formula b; 9-a second liquid level detection unit;

10-a guide rod; 11-linear bearings; 12-a clamping block;

13-oil supply check valve; 14 — a first pressure detection unit;

15-oil supply pipe; 16-safety valve; 17-a sixth solenoid valve;

18-a first digital display meter; 19-compressed gas interface; 20-compressed gas filter;

21-a first one-way valve; 22-a second one-way valve; 23-a return pressure regulating valve;

24-air pump proportion regulating valve; 25-a third solenoid valve;

26-a first solenoid valve; 27-a seventh solenoid valve; 28-a second quick coupling;

29-liquid inlet pipe; 30-a liquid supply tank; 31 — a first liquid level detection unit;

32-a first blowoff valve; 33-a second stop valve; 34-a water supply filter;

35-a third one-way valve; 36-a fourth one-way valve; 37-a first pneumatic pump;

38 — a second pneumatic pump; 39-fifth one-way valve; 40-a sixth one-way valve;

41-fourth solenoid valve; 42-hydraulic lock; 43-fifth solenoid valve;

44-normally open pneumatic control valve; 46-a second mechanical pressure gauge; 47-a second digital display meter;

48 — a second pressure detection unit; 49-first quick coupling;

50-a second solenoid valve; 51-a measured special-shaped valve; 55-a microcontroller;

56-parameter setting unit; 57-alarm; 58-clamping force detection unit;

59-oil inlet pipe; 60-pressure relief filter; 61-a second blowoff valve;

62-eighth solenoid valve; 63-hydraulic oil filter.

Detailed Description

The hydraulic drive type clamping special-shaped valve burst pressure testing system shown in fig. 1-4 comprises a hydraulic clamping device for clamping a tested special-shaped valve 51, a quick connector connected with the tested special-shaped valve 51, a burst pressure testing device for testing the burst pressure of the tested special-shaped valve 51 and a monitoring device for monitoring the hydraulic clamping device and the burst pressure testing device, wherein the burst pressure testing device comprises a liquid supply tank 30, a liquid supply pipe connected with the liquid supply tank 30, a pressurizing mechanism arranged on the liquid supply pipe and a pressure relief mechanism connected with the outlet end of the liquid supply pipe, the pressurizing mechanism comprises a gas supply mechanism, a gas pump proportion regulating valve 24 and a return pressure regulating valve 23 for regulating the driving gas pressure output by the gas supply mechanism, a first pneumatic pump 37 and a second pneumatic pump 38 for pressurizing the liquid pressure in the liquid supply pipe and a first pneumatic pump 37 and a second pneumatic pump 38 for controlling the first pneumatic pump 37 and the second pneumatic pump 38 The pneumatic pump control assembly comprises a first electromagnetic valve 26 arranged at the air inlet of a first pneumatic pump 37, a second electromagnetic valve 50 arranged at the air outlet of the first pneumatic pump 37, a third electromagnetic valve 25 arranged at the air inlet of a second pneumatic pump 38 and a fourth electromagnetic valve 41 arranged at the air outlet of the second pneumatic pump 38, wherein the quick connection joints comprise a first quick joint 49, a second quick joint 28 and a standby quick joint, the outlet end of the liquid supply pipe is connected with the inlet of a tested special-shaped valve 51 through the first quick joint 49, and the pressure relief mechanism comprises a pressure relief pipe connected with the outlet end of the liquid supply pipe, a normally-open pneumatic valve 44 arranged on the pressure relief pipe and a fifth electromagnetic valve 43 for controlling the normally-open pneumatic valve 44;

the hydraulic clamping device comprises a hydraulic clamping mechanism for clamping a tested special-shaped valve 51, the hydraulic clamping mechanism comprises two symmetrically arranged hydraulic cylinders 2 and two groups of clamping assemblies respectively arranged on the two hydraulic cylinders 2, each group of clamping assemblies comprises a plurality of clamping rods 4 of which one ends can be contracted or extended out of the hydraulic cylinders 2, the clamping rods 4 are arranged in a plurality of rows and columns, the hydraulic cylinders 2 are connected with a hydraulic oil tank 6 through oil supply pipes 15, and oil pumps 8, sixth electromagnetic valves 17 and hydraulic locks 42 are arranged on the oil supply pipes;

the monitoring device comprises a microcontroller 55 and a parameter setting unit 56 and an alarm 57 respectively connected with the microcontroller 55, the input end of the microcontroller 55 is connected with a timer 5, a clamping force detection unit 58, a first pressure detection unit 14 for detecting the liquid supply pressure of the hydraulic cylinder 2, a second pressure detection unit 48 for detecting the pressure at the outlet end of the liquid supply pipe, and a first liquid level detection unit 31 that detects the liquid level of the liquid supply tank 30 and a second liquid level detection unit 9 that detects the liquid level of the hydraulic oil tank 6, the output end of the microcontroller 55 is connected with the first digital display meter 18, the second digital display meter 47 and the alarm 57, the first electromagnetic valve 26, the second electromagnetic valve 50, the third electromagnetic valve 25, the fourth electromagnetic valve 41, the sixth electromagnetic valve 17, the fifth electromagnetic valve 43, the oil pump 8, the air pump proportional control valve 24 and the return pressure regulating valve 23 are all controlled by a microcontroller 55.

In this embodiment, the oil supply pipe 15 is provided with a hydraulic oil filter 63, a first stop valve 7, a first mechanical pressure gauge 1, a safety valve 16 and an oil supply check valve 13, and the first pressure detection unit 14 and the sixth electromagnetic valve 17 are both located on the oil supply pipe 15;

the liquid supply pipe is sequentially provided with a second stop valve 33, a water supply filter 34 and a second mechanical pressure gauge 46 along the liquid flowing direction, a fifth electromagnetic valve 43 is arranged on the oil supply pipeline of the normally open pneumatic control valve 44, and the fifth electromagnetic valve 43 is controlled by a microcontroller 55;

the air supply mechanism comprises a compressed air interface 19 connected with a compressed air source, a pressurized air pipe connected with the compressed air interface 19, a compressed air filter 20 and a first one-way valve 21 which are arranged on the pressurized air pipe, a first branch air pipe, a second branch air pipe and a third branch air pipe are arranged at the outlet of the pressurized air pipe, an air pump proportion adjusting valve 24 is arranged on the first branch air pipe, the first branch air pipe is connected with the air inlet of a first pneumatic pump 37 through a first air inlet pipe, a first electromagnetic valve 26 is arranged on the first air inlet pipe, the first branch air pipe is connected with the air inlet of a second pneumatic pump 38 through a second air inlet pipe, a third electromagnetic valve 25 is arranged on the second air inlet pipe, the second branch air pipe is connected with the air outlet of the first pneumatic pump 37 through a first return air pipe, and the second branch air pipe is connected with the air outlet of the second pneumatic pump 38 through a second return air pipe, the return pressure regulating valve 23 is located on the second branch gas pipe, the third branch gas pipe supplies gas for the first electromagnetic valve 26, the third electromagnetic valve 25 and the fifth electromagnetic valve 43 respectively, and the third branch gas pipe is provided with a second one-way valve 22;

the pressure relief pipe is provided with a pressure relief filter 60.

In this embodiment, a liquid inlet pipe 29 is disposed on the liquid supply tank 30, a seventh electromagnetic valve 27 is disposed on the liquid inlet pipe 29, a first drain pipe and a first drain valve 32 disposed on the first drain pipe are disposed at the bottom of the liquid supply tank 30, and the first liquid level detection unit 31 is located in the liquid supply tank 30;

an oil inlet pipe 59 is arranged on the hydraulic oil tank 6, an eighth electromagnetic valve 62 is arranged on the oil inlet pipe 59, a second blowdown oil pipe and a second blowdown valve 61 arranged on the second blowdown oil pipe are arranged at the bottom of the oil inlet pipe 59, the second liquid level detection unit 9 is located in the hydraulic oil tank 6, and the first blowdown valve 32 and the second blowdown valve 61 are controlled by a microcontroller 55;

the first solenoid valve 26 and the third solenoid valve 25 are both external pilot type solenoid valves, and the second solenoid valve 50 and the fourth solenoid valve 41 are both internal pilot type solenoid valves.

The first pneumatic pump 37 has a pressure increase ratio smaller than that of the second pneumatic pump 38.

It should be noted that, the clamping area in the measured special-shaped valve 51 has parallel planes or arc-shaped surfaces, when the four special-shaped valves are actually clamped, an end of a part of the clamping rods 4 in the plurality of clamping rods 4 in one group abuts against one side surface of the clamping area in the measured special-shaped valve 51, an end of a part of the clamping rods 4 in the plurality of clamping rods 4 in the other group abuts against the other side surface of the clamping area in the measured special-shaped valve 51, and meanwhile, a part of the clamping rods 4 in the two groups of clamping rods 4 are inserted between gaps of the measured special-shaped valve 51 to fix and position the measured special-shaped valve 51.

In this embodiment, when the hydraulic oil in the hydraulic oil tank 6 is contaminated and unusable, the contaminated hydraulic oil can be discharged from the hydraulic oil tank 6 through the second blow-down pipe by opening the second blow-down valve 61.

In this embodiment, hydraulic tank 6 is inside to be laid second liquid level detection unit 9, high liquid level alarm and low liquid level alarm have been laid on hydraulic tank 6's the inside lateral wall, high liquid level alarm is close to hydraulic tank's top, low liquid level alarm is close to hydraulic tank 6's bottom.

In this embodiment, the second liquid level detecting unit 9 is a magnetic floating ball level meter.

It should be noted that the amount of hydraulic oil in the hydraulic oil tank 6 can be detected in real time by arranging the second liquid level detection unit 9, the high liquid level alarm prevents the waste of hydraulic oil caused by overflow when the hydraulic oil is injected into the hydraulic oil tank 6, and the low liquid level alarm prevents timely alarming and prompting of workers when the hydraulic oil in the hydraulic oil tank 6 is insufficient.

It should be noted that, the setting of hydraulic oil filter 63 makes the hydraulic oil of hydraulic tank 6 output purer, makes hydraulic oil right pipeline damage among the hydraulic clamping device is littleer, and reduces the damage of hydraulic oil to pneumatic cylinder 2, sixth solenoid valve 17 and hydraulic pressure lock 42, and makes pneumatic cylinder 2 is better to the drive effect of clamping rod 4. The arrangement of the oil supply one-way valve 13 enables the pressure of the hydraulic oil entering the hydraulic cylinder 2 to be maintained, and the stable driving of the hydraulic cylinder 2 to the clamping rod 4 is ensured.

In this embodiment, the second stop valve 33 is arranged, and when oil leaks from the pipeline in the hydraulic clamping device, the hydraulic oil output from the hydraulic oil tank 6 is closed through the second stop valve 33 in time, so that the waste of the hydraulic oil can be reduced.

A method for testing the burst pressure of a hydraulically-driven clamped profiled valve as shown in fig. 5 and fig. 6A to fig. 6H, the method comprising:

step one, preparation work before testing:

step 102, connecting a compressed air source and adding a test solution: connecting a 0.7MPa compressed air source with the hydraulic oil tank 6, connecting a liquid supply source with the liquid supply tank 30, adding a test solution into the liquid supply tank 30 until the liquid level value detected by the first liquid level detection unit 31 meets a preset test liquid level set value, connecting the oil supply source with the hydraulic oil tank 6, and adding hydraulic oil into the hydraulic oil tank 6 until the liquid level value detected by the second liquid level detection unit 9 meets a preset hydraulic oil level set value;

step 201, defining a special-shaped valve structure:

as shown in fig. 6A, the through type a valve is composed of a first valve body 1-1 and a first valve handle 1-2 arranged on the first valve body 1-1, the central line of the inlet of the first valve body 1-1 coincides with the central line of the outlet of the first valve body 1-1, the first valve body 1-1 has two through a planes 1-3, the two through a planes 1-3 are opposite, and a first hand wheel is arranged on the first valve handle 1-2;

as shown in fig. 6B, the straight-through B valve comprises a second valve body 2-1, a second valve handle 2-2 arranged on the second valve body 2-1, and a sewage draining part 2-4 arranged on the second valve body 2-1, wherein the central line of the inlet of the second valve body 2-1 coincides with the central line of the outlet of the second valve body 2-1, the second valve body 2-1 has a straight-through B plane 2-3, the second valve handle 2-2 is provided with a regular polyhedron 2-5, and the second valve handle 2-2 is provided with a second hand wheel;

as shown in fig. 6C, the straight-through valve C is composed of a third valve body 3-1 and a third valve handle 3-2 arranged on the third valve body 3-1, the central line of the inlet of the third valve body 3-1 coincides with the central line of the outlet of the third valve body 3-1, the surface of the third valve body 3-1 is an arc-shaped surface 3-3, and a third hand wheel is arranged on the third valve body 3-1;

as shown in fig. 6D, the different-axis valve is composed of a fourth valve body 4-1 and two fourth valve handles 4-2 arranged on the fourth valve body 4-1, the central lines of the inlet of the fourth valve body 4-1 and the outlet of the fourth valve body 4-1 are arranged in parallel up and down, the fourth valve body 4-1 is provided with two different-axis planes 4-3, the two different-axis planes 4-3 are opposite, and a fourth hand wheel is arranged on the fourth valve body 4-1;

as shown in fig. 6E, the angle a valve is composed of a fifth valve body 5-1 and a fifth valve handle 5-2 arranged on the fifth valve body 5-1, the central lines of the inlet of the fifth valve body 5-1 and the outlet of the fifth valve body 5-1 are arranged vertically, the fifth valve body 5-1 has two angle planes 5-3, the two angle planes 5-3 are opposite, and a fifth hand wheel is arranged on the fifth valve body 5-1;

as shown in fig. 6F, the angle b valve is composed of a sixth valve body 6-1 and two sixth valve handles 6-2 arranged on the sixth valve body 6-1, the center lines of the inlet of the sixth valve body 6-1 and the outlet of the sixth valve body 6-1 are vertically arranged, and the sixth valve handle 6-2 is provided with a sixth hand wheel and an angle arc part 6-3;

as shown in fig. 6G, the three-way valve a is composed of a seventh valve body 7-1 and a seventh valve handle 7-2 disposed on the seventh valve body 7-1, an inlet of the seventh valve body 7-1 and an outlet of the seventh valve body 7-1 are located on the same plane, the seventh valve body 7-1 has two three-way a planes 7-3, the two three-way a planes 7-3 are opposite, and a seventh handwheel is disposed on the seventh valve handle 7-2;

as shown in fig. 6H, the three-way valve b is composed of an eighth valve body 8-1 and an eighth valve handle 8-2 arranged on the eighth valve body 8-1, an inlet of the eighth valve body 8-1 and an outlet of the eighth valve body 8-1 are not located on the same plane, the eighth valve body 8-1 has two three-way b planes 8-3, the two three-way b planes 8-4 are adjacent planes, and the eighth valve handle 8-2 is provided with an eighth hand wheel and a three-way arc portion 8-3;

step 202, determining the clamped area of the special-shaped valve:

according to the definition of the special-shaped valve structure in step 201, judging the special-shaped valve 51 to be tested:

when the tested special-shaped valve 51 belongs to a straight-through type a valve, taking two straight-through a planes 1-3 as a clamped area;

when the tested special-shaped valve 51 belongs to a straight-through type b valve, two opposite surfaces of the regular polyhedron 2-5 are used as clamped areas;

when the tested special-shaped valve 51 belongs to a straight-through type c valve, the arc-shaped surface 3-3 is used as a clamped area;

when the measured special-shaped valve 51 belongs to an off-axis valve, taking the two off-axis planes 4-3 as a clamped area;

when the measured special-shaped valve 51 belongs to an angle type a valve, taking the two angle type planes 5-3 as a clamped area;

when the measured special-shaped valve 51 belongs to an angle type b valve, taking the arc-shaped surface of the angle type arc part 6-3 as a clamped area;

when the detected special-shaped valve 51 belongs to a three-way type a valve, taking the two three-way type a planes 7-3 as a clamped area;

when the measured special-shaped valve 51 belongs to a three-way valve b, taking the arc-shaped surface of the three-way arc-shaped part 8-3 as a clamped area;

301, setting a hydraulic cylinder pressure test value to a microcontroller 55 through a parameter setting unit 56, placing a tested special-shaped valve 51 between two hydraulic cylinders 2, controlling a sixth electromagnetic valve 17 to be powered on through the microcontroller 55, controlling an oil pump 8 to work through the microcontroller 55 to adjust hydraulic pressure in an oil supply pipe 15, enabling the hydraulic pressure in the oil supply pipe 15 to be equal to the hydraulic cylinder pressure test value, introducing air into a rodless cavity of the hydraulic cylinder 2 through the oil supply pipe 15, extending clamping rods 4 in the hydraulic cylinders 2, and enabling the N clamping rods 4 to be in contact with one side surface of a clamped area in the tested special-shaped valve 51, so that the number of the clamping rods 4 in contact with the clamped area is N, wherein N is a positive integer and is not more than the total number of the clamping rods 4; wherein the other side surface of the clamped area is contacted with the N clamping rods 4;

step 302, controlling the sixth electromagnetic valve 17 to be powered off through the microcontroller 55, controlling the oil pump 8 to stop working through the microcontroller 55, and inputting the number N of the clamping rods 4 in contact with the clamped area to the microcontroller 55 through the parameter setting unit 56;

step 401, setting a set value of the hydraulic clamping force of the measured special-shaped valve 51, and recording the set value of the hydraulic clamping force of the measured special-shaped valve 51 as F_ys；

Step 402, microcontroller 55 generates a formula

Obtaining a hydraulic pressure set value P_ysThereafter, the hydraulic pressure set point P is set by the microcontroller 55_ys(ii) a Wherein D denotes the diameter of each gripping rod 4 in the hydraulic cylinder 2;

step 403, placing the tested special-shaped valve 51 between the two hydraulic cylinders 2, controlling the sixth electromagnetic valve 17 to be electrified through the microcontroller 55, controlling the oil pump 8 to work through the microcontroller 55 to adjust the hydraulic pressure in the oil supply pipe 15, enabling the hydraulic oil pressure in the oil supply pipe 15 to be equal to a hydraulic clamping force set value, introducing air into a rodless cavity of the hydraulic cylinder 2 through the oil supply pipe 15, extending the clamping rod 4 in the hydraulic cylinder 2, clamping the tested special-shaped valve 51, and locking the hydraulic lock 42;

step 404, connecting the quick connector with an inlet and an outlet of the tested special-shaped valve 51;

step 501, in the process that the clamped area in the measured special-shaped valve 51 is clamped, the clamping force detection unit 58 collects the clamping force when the clamping rod 4 clamps the clamped area, and the collected clamping force detection value F_cTo the microcontroller 55;

step 502, microcontroller 55 collects the clamping force detection values F received according to the time sequence_cWith the set value F of the hydraulic clamping force_ysComparing, and detecting the clamping force F_cWith the set value F of the hydraulic clamping force_ysSatisfy | F_ys-F_cWhen the | is less than or equal to α, executing step 503, otherwise, executing step 504;

step 503, repeating the steps 501 to 502 until the preset clamping time of the timer 5 is reached, which indicates that the clamping of the measured special-shaped valve 51 is stable;

step 504, the microcontroller 55 controls the alarm 57 to alarm and remind, the hydraulic lock 42 is unlocked, and the microcontroller 55 controls the oil pump 8 to adjust the hydraulic pressure in the oil supply pipe 15 so as to stably clamp the tested special-shaped valve 51;

step six, testing the bursting pressure of the special-shaped valve:

601, controlling the air pump proportion regulating valve 24 and the return pressure regulating valve 23 to regulate the driving air pressure by the microcontroller 55, and controlling the first electromagnetic valve 26 and the second electromagnetic valve 50 to be electrified in a reciprocating manner by the microcontroller 55, wherein the air supply mechanism provides driving air for the first pneumatic pump 37 to start the first pneumatic pump 37, so that the detected special-shaped valve 51 is quickly filled with water;

step 602, the microcontroller 55 controls the first electromagnetic valve 26 and the second electromagnetic valve 50 to be powered off, the first pneumatic pump 37 stops working, the microcontroller 55 controls the air pump proportion regulating valve 24 and the return pressure regulating valve 23 to regulate the driving air pressure, and then the microcontroller 55 controls the third electromagnetic valve 25 and the fourth electromagnetic valve 41 to be powered on in a reciprocating manner, and the air supply mechanism provides driving air for the second pneumatic pump 38 to start the second pneumatic pump 38;

step 603, the microcontroller 55 adjusts the driving air pressure to rise through the air pump proportion adjusting valve 24 and the return pressure adjusting valve 23, so that the outlet pressure of the second pneumatic pump 38 continuously rises at a constant speed, and the pressure at the outlet end of the liquid supply pipe continuously rises at a constant speed; the second pressure detecting unit 48 detects the pressure at the outlet end of the liquid supply tube in real time during the process that the pressure at the outlet end of the liquid supply tube continuously rises at a constant speed, and sends the detected pressure at the outlet end of the liquid supply tube to the microcontroller 55;

step 604, when the pressure at the outlet end of the liquid supply pipe rises to the measured special-shaped valve 51 and explodes, acquiring the explosion pressure of the measured special-shaped valve 51 through the second pressure detection unit 48, and sending the explosion pressure of the measured special-shaped valve 51 to the microcontroller 55; meanwhile, the microcontroller 55 controls the third electromagnetic valve 25 and the fourth electromagnetic valve 41 to be powered off, and the first pneumatic pump 37 stops working;

step 605, controlling the fifth electromagnetic valve 43 to be electrified by the microcontroller 55, and closing the normally open pneumatic control valve 44 to start pressure relief;

step seven, disassembling the special-shaped valve: and (3) disassembling the quick connector, controlling the sixth electromagnetic valve 17 to be disconnected through the microcontroller 55, introducing air into the rod cavity of the hydraulic cylinder 2, contracting the clamping rod 4 in the hydraulic cylinder 2, and disassembling the tested special-shaped valve 51 after the test is finished.

In this embodiment, before the burst pressure test of the profile valve in the step six, the tested profile valve 51 needs to be opened.

In this embodiment, in step 404, when the measured special-shaped valve 51 has an inlet and an outlet, the first quick connector 49 is connected to the inlet of the measured special-shaped valve 51, and the second quick connector 28 is connected to the outlet of the measured special-shaped valve 51;

when the tested special-shaped valve 51 has one inlet and two outlets, the first quick connector 49 is connected with the inlet of the tested special-shaped valve 51, the second quick connector 28 is connected with one outlet of the tested special-shaped valve 51, and the standby quick connector is connected with the other outlet of the tested special-shaped valve 51;

when the tested special-shaped valve 51 has two inlets and two outlets, the first quick connector 49 is connected with one inlet of the tested special-shaped valve 51, the spare quick connector is connected with the other inlet of the tested special-shaped valve 51, and the second quick connector 28 is connected with one outlet of the tested special-shaped valve 51.

the liquid supply pipe is sequentially provided with a second stop valve 33, a water supply filter 34 and a second mechanical pressure gauge 46 along the liquid flowing direction, and the fifth electromagnetic valve 43 is positioned on the air supply pipeline of which the air supply mechanism supplies air for the normally open air control valve 44;

in the process of controlling the oil pump 8 to work and adjust the hydraulic pressure in the oil supply pipe 15 through the microcontroller 55 in the step 301 and the step 403, the first pressure detection unit 14 detects the hydraulic pressure in the oil supply pipe 15 in real time, the detection result is transmitted to the microcontroller 55, the microcontroller 55 controls the first digital display meter 18 to synchronously display, so that the hydraulic pressure displayed on the first digital display meter 18 is equal to the pressure set value P of the hydraulic cylinder_ys。

In this embodiment, before the microcontroller 55 controls the sixth electromagnetic valve 17 to be energized in step 301 and step 403, the first cut-off valve 7 is operated to be opened; when the measured special-shaped valve 51 is clamped in the step 403, the safety valve 16 is opened when the hydraulic pressure in the oil supply pipe 15 exceeds a safety hydraulic pressure set value;

in the step 301 and the step 403, the hydraulic pressure in the oil supply pipe 15 is detected in real time through the first mechanical pressure gauge 1, so that the hydraulic pressure in the oil supply pipe 15 displayed by the first mechanical pressure gauge 1 is the same as the hydraulic pressure in the oil supply pipe 15 displayed by the first digital display gauge 18;

in step 603, the pressure at the outlet end of the liquid supply tube is detected in real time by the second mechanical pressure gauge 46, so that the pressure at the outlet end of the liquid supply tube displayed by the second mechanical pressure gauge 46 is the same as the pressure at the outlet end of the liquid supply tube displayed by the second digital display meter 47.

In this embodiment, the deviation α between the detected value of the clamping force and the set value of the hydraulic clamping force in step 502 has a value range of 1-2.

In this embodiment, in step 504, the microcontroller 55 controls the oil pump 8 to adjust the hydraulic pressure in the oil supply pipe 15, so as to stably clamp the measured special-shaped valve 51, which includes the following specific steps:

when | F_ys-F_cI > α and F_c＜F_ysAccording to formula F, microcontroller 55_ys′＝F_ys+ α, obtaining the hydraulic clamping force adjusting value F of the tested special-shaped valve 51_ys', microcontroller 55 according to formula

Obtaining a hydraulic cylinder pressure adjusting value P'_ysAnd repeating the steps 501 to 504 to stably clamp the tested special-shaped valve 51.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A hydraulic drive type clamping special-shaped valve burst pressure testing method is characterized in that a testing system adopted by the method comprises a hydraulic clamping device for clamping a tested special-shaped valve (51), a quick connector connected with the tested special-shaped valve (51), a burst pressure testing device for testing the burst pressure of the tested special-shaped valve (51) and a monitoring device for monitoring the hydraulic clamping device and the burst pressure testing device, wherein the burst pressure testing device comprises a liquid supply box (30), a liquid supply pipe connected with the liquid supply box (30), a pressurizing mechanism arranged on the liquid supply pipe and a pressure relief mechanism connected with the outlet end of the liquid supply pipe, the pressurizing mechanism comprises a gas supply mechanism, a gas pump proportion adjusting valve (24) and a return pressure adjusting valve (23) for adjusting the driving gas pressure output by the gas supply mechanism, and a first pneumatic pump (37) and a second pneumatic pump (38) for pressurizing the hydraulic pressure in the liquid supply pipe so as to realize the monitoring of the hydraulic clamping device and the burst pressure testing device, and the air supply mechanism comprises a gas supply mechanism The pneumatic pump control assembly is used for controlling the first pneumatic pump (37) and the second pneumatic pump (38), the pneumatic pump control assembly comprises a first electromagnetic valve (26) arranged at an air inlet of the first pneumatic pump (37), a second electromagnetic valve (50) arranged at an air outlet of the first pneumatic pump (37), a third electromagnetic valve (25) arranged at an air inlet of the second pneumatic pump (38) and a fourth electromagnetic valve (41) arranged at an air outlet of the second pneumatic pump (38), the quick connecting joints comprise a first quick joint (49), a second quick joint (28) and a standby quick joint, an outlet end of the liquid supply pipe is connected with an inlet of a tested special-shaped valve (51) through the first quick joint (49), and the pressure relief mechanism comprises a pressure relief pipe connected with the outlet end of the liquid supply pipe, a normally open pneumatic control valve (44) arranged on the pressure relief pipe and a fifth electromagnetic valve (43) for controlling the normally open pneumatic control valve (44);

the hydraulic clamping device comprises a hydraulic clamping mechanism for clamping a tested special-shaped valve (51), the hydraulic clamping mechanism comprises two symmetrically arranged hydraulic cylinders (2) and two groups of clamping assemblies respectively arranged on the two hydraulic cylinders (2), each group of clamping assemblies comprises a plurality of clamping rods (4) of which one ends can be contracted or extended out of the hydraulic cylinders (2), the clamping rods (4) are arranged in a plurality of rows and columns, the hydraulic cylinders (2) are connected with a hydraulic oil tank (6) through oil supply pipes (15), and oil pumps (8), sixth electromagnetic valves (17) and hydraulic locks (42) are arranged on the oil supply pipes;

the monitoring device comprises a microcontroller (55), a parameter setting unit (56) and an alarm (57) which are respectively connected with the microcontroller (55), wherein the input end of the microcontroller (55) is connected with a timer (5), a clamping force detection unit (58), a first pressure detection unit (14) for detecting the liquid supply pressure of the hydraulic cylinder (2), a second pressure detection unit (48) for detecting the pressure of the outlet end of the liquid supply pipe, a first liquid level detection unit (31) for detecting the liquid level of the liquid supply box (30) and a second liquid level detection unit (9) for detecting the liquid level of the hydraulic oil tank (6), the output end of the microcontroller (55) is connected with a first digital display meter (18), a second digital display meter (47) and an alarm (57), and the first electromagnetic valve (26), the second electromagnetic valve (50), The third electromagnetic valve (25), the fourth electromagnetic valve (41), the sixth electromagnetic valve (17), the fifth electromagnetic valve (43), the oil pump (8), the air pump proportion regulating valve (24) and the return pressure regulating valve (23) are all controlled by a microcontroller (55), and the method is characterized by comprising the following steps:

step one, preparation work before testing:

step 102, connecting a compressed air source and adding a test solution: connecting a 0.7MPa compressed air source with the hydraulic oil tank (6), connecting a liquid supply source with the liquid supply tank (30), adding a test solution into the liquid supply tank (30) until the liquid level value detected by the first liquid level detection unit (31) meets a preset liquid level set value, connecting the oil supply source with the hydraulic oil tank (6), and adding hydraulic oil into the hydraulic oil tank (6) until the liquid level value detected by the second liquid level detection unit (9) meets the preset hydraulic oil level set value;

step 201, defining a special-shaped valve structure:

the straight-through type a valve is composed of a first valve body (1-1) and a first valve handle (1-2) arranged on the first valve body (1-1), the central line of the inlet of the first valve body (1-1) is coincident with the central line of the outlet of the first valve body (1-1), the first valve body (1-1) is provided with two straight-through a planes (1-3), the two straight-through a planes (1-3) are opposite, and a first hand wheel is arranged on the first valve handle (1-2);

the straight-through type b valve consists of a second valve body (2-1), a second valve handle (2-2) arranged on the second valve body (2-1) and a sewage discharge part (2-4) arranged on the second valve body (2-1), wherein the central line of the inlet of the second valve body (2-1) is coincident with the central line of the outlet of the second valve body (2-1), the second valve body (2-1) is provided with a straight-through b plane (2-3), the second valve handle (2-2) is provided with a regular polyhedron (2-5), and the second valve handle (2-2) is provided with a second hand wheel;

the straight-through type c valve is composed of a third valve body (3-1) and a third valve handle (3-2) arranged on the third valve body (3-1), the central line of the inlet of the third valve body (3-1) is coincident with the central line of the outlet of the third valve body (3-1), the surface of the third valve body (3-1) is an arc-shaped surface (3-3), and a third hand wheel is arranged on the third valve body (3-1);

the different-axis valve is composed of a fourth valve body (4-1) and two fourth valve handles (4-2) arranged on the fourth valve body (4-1), the central lines of the inlet of the fourth valve body (4-1) and the outlet of the fourth valve body (4-1) are arranged in parallel up and down, the fourth valve body (4-1) is provided with two different-axis planes (4-3), the two different-axis planes (4-3) are opposite, and a fourth hand wheel is arranged on the fourth valve body (4-1);

the angle type a valve consists of a fifth valve body (5-1) and a fifth valve handle (5-2) arranged on the fifth valve body (5-1), the central lines of the inlet of the fifth valve body (5-1) and the outlet of the fifth valve body (5-1) are vertically arranged, the fifth valve body (5-1) is provided with two angle type planes (5-3), the two angle type planes (5-3) are opposite, and a fifth hand wheel is arranged on the fifth valve body (5-1);

the angle type b valve consists of a sixth valve body (6-1) and two sixth valve handles (6-2) arranged on the sixth valve body (6-1), the center lines of the inlet of the sixth valve body (6-1) and the outlet of the sixth valve body (6-1) are vertically arranged, and a sixth hand wheel and an angle type arc part (6-3) are arranged on the sixth valve handles (6-2);

the three-way type a valve consists of a seventh valve body (7-1) and a seventh valve handle (7-2) arranged on the seventh valve body (7-1), wherein the inlet of the seventh valve body (7-1) and the outlet of the seventh valve body (7-1) are positioned on the same plane, the seventh valve body (7-1) is provided with two three-way type a planes (7-3), the two three-way type a planes (7-3) are opposite, and a seventh hand wheel is arranged on the seventh valve handle (7-2);

the three-way type b valve consists of an eighth valve body (8-1) and an eighth valve handle (8-2) arranged on the eighth valve body (8-1), the inlet of the eighth valve body (8-1) and the outlet of the eighth valve body (8-1) are not positioned on the same plane, the eighth valve body (8-1) is provided with two three-way type b planes (8-3), the two three-way type b planes (8-4) are adjacent planes, and an eighth hand wheel and a three-way arc-shaped part (8-3) are arranged on the eighth valve handle (8-2);

step 202, determining the clamped area of the special-shaped valve:

judging the tested special-shaped valve (51) according to the definition of the special-shaped valve structure in the step 201:

when the tested special-shaped valve (51) belongs to a straight-through type a valve, two straight-through a planes (1-3) are used as clamped areas;

when the tested special-shaped valve (51) belongs to a straight-through type b valve, two opposite surfaces of the regular polyhedron (2-5) are used as clamped areas;

when the measured special-shaped valve (51) belongs to a straight-through type c valve, the arc-shaped surface (3-3) is used as a clamped area;

when the measured special-shaped valve (51) belongs to an off-axis valve, taking two off-axis planes (4-3) as a clamped area;

when the measured special-shaped valve (51) belongs to an angle type a valve, two angle type planes (5-3) are used as clamped areas;

when the measured special-shaped valve (51) belongs to an angle type b valve, the arc-shaped surface of the angle type arc part (6-3) is used as a clamped area;

when the detected special-shaped valve (51) belongs to a three-way type a valve, the two three-way type a planes (7-3) are used as clamped areas;

when the measured special-shaped valve (51) belongs to a three-way valve b, the arc-shaped surface of the three-way arc-shaped part (8-3) is used as a clamped area;

step 301, setting a hydraulic cylinder pressure test value to a microcontroller (55) through a parameter setting unit (56), placing a tested special-shaped valve (51) between two hydraulic cylinders (2), the microcontroller (55) controls the sixth electromagnetic valve (17) to be electrified, the microcontroller (55) controls the oil pump (8) to work to adjust the hydraulic pressure in the oil supply pipe (15), the hydraulic oil pressure in the oil supply pipe (15) is equal to a hydraulic cylinder pressure test value, air is fed into a rodless cavity of the hydraulic cylinder (2) through an oil supply pipe (15), clamping rods (4) in the hydraulic cylinder (2) extend, N clamping rods (4) are in contact with one side surface of the clamped area in the tested special-shaped valve (51), obtaining the number of the clamping rods (4) in contact with the clamped area as N, wherein N is a positive integer and is not more than the total number of the clamping rods (4); wherein the other side surface of the clamped area is contacted with N clamping rods (4);

step 302, controlling the sixth electromagnetic valve (17) to be powered off through the microcontroller (55), controlling the oil pump (8) to stop working through the microcontroller (55), and inputting the number N of the clamping rods (4) in contact with the clamped area to the microcontroller (55) through the parameter setting unit (56);

step 401, setting a hydraulic clamping force set value of the measured special-shaped valve (51), and recording the hydraulic clamping force set value of the measured special-shaped valve (51) as F_ys；

Step 402, microcontroller (55) generates a formula

Obtaining a hydraulic pressure set value P_ysThen, the hydraulic pressure is set by the microcontroller (55)Pressure set point P_ys(ii) a Wherein D represents the diameter of each clamping rod (4) in the hydraulic cylinder (2);

step 403, placing the tested special-shaped valve (51) between the two hydraulic cylinders (2), controlling the sixth electromagnetic valve (17) to be electrified through the microcontroller (55), controlling the oil pump (8) to work through the microcontroller (55) to adjust the hydraulic pressure in the oil supply pipe (15), enabling the hydraulic oil pressure in the oil supply pipe (15) to be equal to a set value of a hydraulic clamping force, introducing air into a rodless cavity of the hydraulic cylinder (2) through the oil supply pipe (15), extending a clamping rod (4) in the hydraulic cylinder (2), clamping the tested special-shaped valve (51), and locking the hydraulic lock (42);

step 404, connecting the quick connector with an inlet and an outlet of the tested special-shaped valve (51);

step 501, in the process that the clamped area in the tested special-shaped valve (51) is clamped, a clamping force detection unit (58) collects the clamping force when the clamping rod (4) clamps the clamped area, and the collected clamping force detection value F is used for detecting the clamping force_cTo a microcontroller (55);

step 502, the microcontroller (55) performs the received clamping force detection values F according to the acquisition time sequence_cWith the set value F of the hydraulic clamping force_ysComparing, and detecting the clamping force F_cWith the set value F of the hydraulic clamping force_ysSatisfy | F_ys-F_cWhen the | is less than or equal to α, executing step 503, otherwise, executing step 504;

step 503, repeating the steps 501 to 502 until the preset clamping time of the timer (5) is reached, which indicates that the clamping of the tested special-shaped valve (51) is stable;

step 504, the microcontroller (55) controls the alarm (57) to alarm and remind, the hydraulic lock (42) is unlocked, and the microcontroller (55) controls the oil pump (8) to adjust the hydraulic pressure in the oil supply pipe (15) so as to stably clamp the detected special-shaped valve (51);

step six, testing the bursting pressure of the special-shaped valve:

601, controlling an air pump proportion regulating valve (24) and a return pressure regulating valve (23) by a microcontroller (55) to regulate the pressure of driving air, controlling a first electromagnetic valve (26) and a second electromagnetic valve (50) to be electrified in a reciprocating mode by the microcontroller (55), and providing driving air for a first pneumatic pump (37) by an air supply mechanism to start the first pneumatic pump (37) so as to quickly fill the detected special-shaped valve (51) with water;

step 602, the microcontroller (55) controls the first electromagnetic valve (26) and the second electromagnetic valve (50) to be powered off, the first pneumatic pump (37) stops working, the microcontroller (55) controls the air pump proportion regulating valve (24) and the return pressure regulating valve (23) to regulate the pressure of the driving air, then the microcontroller (55) controls the third electromagnetic valve (25) and the fourth electromagnetic valve (41) to be powered on in a reciprocating mode, and the air supply mechanism provides the driving air for the second pneumatic pump (38) to enable the second pneumatic pump (38) to be started;

step 603, the microcontroller (55) adjusts the driving air pressure to rise through the air pump proportion adjusting valve (24) and the return pressure adjusting valve (23), so that the outlet pressure of the second pneumatic pump (38) continuously rises at a constant speed, and the pressure at the outlet end of the liquid supply pipe continuously rises at a constant speed; in the process that the pressure at the outlet end of the liquid supply pipe continuously rises at a constant speed, a second pressure detection unit (48) detects the pressure at the outlet end of the liquid supply pipe in real time and sends the detected pressure at the outlet end of the liquid supply pipe to a microcontroller (55);

step 604, when the pressure at the outlet end of the liquid supply pipe rises to the measured special-shaped valve (51) and explodes, acquiring the explosion pressure of the measured special-shaped valve (51) through a second pressure detection unit (48), and sending the explosion pressure of the measured special-shaped valve (51) to a microcontroller (55); meanwhile, the microcontroller (55) controls the third electromagnetic valve (25) and the fourth electromagnetic valve (41) to be powered off, and the first pneumatic pump (37) stops working;

step 605, controlling the fifth electromagnetic valve (43) to be electrified by the microcontroller (55), and closing the normally open pneumatic control valve (44) to start pressure relief;

step seven, disassembling the special-shaped valve: disassembling the quick connector, controlling a sixth electromagnetic valve (17) to be disconnected through a microcontroller (55), introducing air into a rod cavity of the hydraulic cylinder (2), contracting a clamping rod (4) in the hydraulic cylinder (2), and disassembling the tested special-shaped valve (51) after the test is finished;

the value range of the deviation α between the clamping force detection value and the hydraulic clamping force set value in the step 502 is 1-2.

2. The method for testing the burst pressure of a hydraulically actuated clamped profile valve according to claim 1, wherein: the oil supply pipe (15) is provided with a hydraulic oil filter (63), a first stop valve (7), a first mechanical pressure gauge (1), a safety valve (16) and an oil supply one-way valve (13), and the first pressure detection unit (14) and the sixth electromagnetic valve (17) are both positioned on the oil supply pipe (15);

a second stop valve (33), a water supply filter (34) and a second mechanical pressure gauge (46) are sequentially arranged on the liquid supply pipe along the liquid flowing direction, and the fifth electromagnetic valve (43) is positioned on the air supply pipeline for supplying air to the normally-open air control valve (44) of the air supply mechanism;

the air supply mechanism comprises a compressed air interface (19) connected with a compressed air source, a pressurized air pipe connected with the compressed air interface (19), and a compressed air filter (20) and a first one-way valve (21) which are arranged on the pressurized air pipe, wherein an outlet of the pressurized air pipe is provided with a first branch air pipe, a second branch air pipe and a third branch air pipe, an air pump proportion adjusting valve (24) is arranged on the first branch air pipe, the first branch air pipe is connected with an air inlet of a first pneumatic pump (37) through a first air inlet pipe, a first electromagnetic valve (26) is arranged on the first air inlet pipe, the first branch air pipe is connected with an air inlet of a second pneumatic pump (38) through a second air inlet pipe, a third electromagnetic valve (25) is arranged on the second air inlet pipe, and the second branch air pipe is connected with an air outlet of the first pneumatic pump (37) through a first return air pipe, the second branch air pipe is connected with an air outlet of a second pneumatic pump (38) through a second return air pipe, the second electromagnetic valve (50) is positioned on the first return air pipe, the fourth electromagnetic valve (41) is positioned on the second return air pipe, the return pressure regulating valve (23) is positioned on the second branch air pipe, the third branch air pipe supplies air for the first electromagnetic valve (26), the third electromagnetic valve (25) and the fifth electromagnetic valve (43) respectively, and the third branch air pipe is provided with a second one-way valve (22);

the pressure relief pipe is provided with a pressure relief filter (60).

3. The method for testing the burst pressure of a hydraulically actuated clamped profile valve according to claim 1, wherein: a liquid inlet pipe (29) is arranged on the liquid supply tank (30), a seventh electromagnetic valve (27) is arranged on the liquid inlet pipe (29), a first sewage discharge pipe and a first sewage discharge valve (32) arranged on the first sewage discharge pipe are arranged at the bottom of the liquid supply tank (30), the first liquid level detection unit (31) is positioned in the liquid supply tank (30), and the seventh electromagnetic valve (27) is controlled by a microcontroller (55);

an oil inlet pipe (59) is arranged on the hydraulic oil tank (6), an eighth electromagnetic valve (62) is arranged on the oil inlet pipe (59), a second blowdown oil pipe and a second blowdown valve (61) arranged on the second blowdown oil pipe are arranged at the bottom of the oil inlet pipe (59), and the second liquid level detection unit (9) is located in the hydraulic oil tank (6);

the first solenoid valve (26) and the third solenoid valve (25) are both external pilot-operated solenoid valves, and the second solenoid valve (50) and the fourth solenoid valve (41) are both internal pilot-operated solenoid valves;

the first pneumatic pump (37) has a pressure increase ratio smaller than that of the second pneumatic pump (38).

4. The method for testing the burst pressure of a hydraulically actuated clamped profile valve according to claim 1, wherein: the method is characterized in that: before the burst pressure test of the special-shaped valve in the sixth step, the special-shaped valve (51) to be tested needs to be operated and opened.

5. The method for testing the burst pressure of a hydraulically actuated clamped profile valve according to claim 1, wherein: in step 404, when the tested special-shaped valve (51) has an inlet and an outlet, connecting the first quick connector (49) with the inlet of the tested special-shaped valve (51), and connecting the second quick connector (28) with the outlet of the tested special-shaped valve (51);

when the tested special-shaped valve (51) has one inlet and two outlets, the first quick connector (49) is connected with the inlet of the tested special-shaped valve (51), the second quick connector (28) is connected with one outlet of the tested special-shaped valve (51), and the standby quick connector is connected with the other outlet of the tested special-shaped valve (51);

when the tested special-shaped valve (51) has two inlets and two outlets, the first quick connector (49) is connected with one inlet of the tested special-shaped valve (51), the standby quick connector is connected with the other inlet of the tested special-shaped valve (51), and the second quick connector (28) is connected with one outlet of the tested special-shaped valve (51).

6. The method for testing the burst pressure of a hydraulically actuated clamped profile valve according to claim 1, wherein: in the step 301 and the step 403, in the process of controlling the oil pump (8) to work and adjust the hydraulic pressure in the oil supply pipe (15) through the microcontroller (55), the hydraulic pressure in the oil supply pipe (15) is detected in real time through the first pressure detection unit (14), the detection result is transmitted to the microcontroller (55), and the microcontroller (55) controls the first digital display meter (18) to synchronously display, so that the hydraulic pressure displayed on the first digital display meter (18) is equal to the pressure set value P of the hydraulic cylinder_ys。

7. The method for testing the burst pressure of a hydraulically actuated clamped profile valve according to claim 1, wherein: the oil supply pipe (15) is provided with a hydraulic oil filter (63), a first stop valve (7), a first mechanical pressure gauge (1), a safety valve (16) and an oil supply one-way valve (13), and the first pressure detection unit (14) and the sixth electromagnetic valve (17) are both positioned on the oil supply pipe (15);

before the microcontroller (55) controls the sixth electromagnetic valve (17) to be electrified in the step 301 and the step 403, operating the first stop valve (7) to be opened; when the tested special-shaped valve (51) is clamped in the step 403, when the hydraulic pressure in the oil supply pipe (15) exceeds a safety hydraulic pressure set value, the safety valve (16) is opened;

in the step 301 and the step 403, the hydraulic pressure in the oil supply pipe (15) is detected in real time through the first mechanical pressure gauge (1), so that the hydraulic pressure in the oil supply pipe (15) displayed by the first mechanical pressure gauge (1) is the same as the hydraulic pressure in the oil supply pipe (15) displayed by the first digital display gauge (18);

in step 603, the pressure at the outlet end of the liquid supply pipe is detected in real time through a second mechanical pressure gauge (46), so that the pressure at the outlet end of the liquid supply pipe displayed by the second mechanical pressure gauge (46) is the same as the pressure at the outlet end of the liquid supply pipe displayed by a second digital display gauge (47).

8. The method for testing the burst pressure of a hydraulically actuated clamped profile valve according to claim 1, wherein: in the step 504, the microcontroller (55) controls the oil pump (8) to adjust the hydraulic pressure in the oil supply pipe (15) so as to stably clamp the tested special-shaped valve (51), and the specific process is as follows:

when | F_ys-F_cI > α and F_c＜F_ysThe microcontroller (55) then operates according to the formula F_ys′＝F_ys+ α, obtaining the hydraulic clamping force adjusting value F of the tested special-shaped valve (51)_ys', microcontroller (55) according to formula

Obtaining a hydraulic cylinder pressure adjusting value P'_ysAnd repeating the steps 501 to 504 to enable the clamping of the tested special-shaped valve (51) to be stable.