Life test control system for airtight belt linkage valve

Abstract

The utility model discloses a service life test control system for an airtight belt linkage valve, and the system is characterized in that a test box comprises a ball valve, a pressure reducing valve, the airtight belt linkage valve and a double-acting cylinder which are sequentially connected to the rear end of a test room air source through air pipes, and a three-position five-way valve connected between the test room air source and the double-acting cylinder; the valve inlet end of the airtight belt linkage valve is connected to the pressure reducing valve; a valve ejector rod of the airtight belt linkage valve is connected with the end of a driving assembly in the double-acting air cylinder, and a laboratory air source is connected with two cavities of the double-acting air cylinder through a three-position five-way valve. The airtight belt linkage valve and the double-acting air cylinder are both fixedly installed on the fixing tool, and the airtight belt linkage valve is arranged in the temperature box through the fixing tool. According to the technical scheme provided by the invention, the problem that the air pressure, the stroke change and the environment temperature are difficult to apply at the same time in the existing life test of the airtight belt linkage valve is solved.

Description

Technical Field

[0001] This invention relates to, but is not limited to, the field of life verification technology for airborne equipment, and particularly to a life test control system for airtight belt linkage valves. Background Technology

[0002] Airtight belt interlocking valves are typically installed on seat mounting racks within the airtight compartment of an aircraft and are linked to the emergency hatch cover locking system, forming part of the aircraft's emergency hatch cover jettisoning system. During emergency hatch cover jettisoning, the automatic control system switches the air supply to and from the airtight belt, i.e., automatically controls the "open" and "closed" states of the valves, performing cabin airtightness and de-airtightness operations. The types of loads it withstands during operation primarily include air pressure, stroke, and ambient temperature. During the equipment development phase, life tests are typically conducted to verify the number of "open" and "close" cycles of the valves, ensuring operational reliability throughout the aircraft's entire lifespan.

[0003] In existing life tests of airtight valves, most test devices used for working cycle tests can only apply air pressure and temperature simultaneously, and cannot superimpose the influence factors of the stroke. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned technical problems. This invention provides a life test control system for airtight belt-linked valves to solve the problem that it is difficult to simultaneously apply air pressure, stroke change and ambient temperature in the existing life test of airtight belt-linked valves.

[0005] The technical solution of the present invention: The present invention provides a life test control system for an airtight belt linkage valve, characterized in that it includes: a test box and a fixing fixture;

[0006] The test chamber includes a ball valve 1, a pressure reducing valve 2, an airtight linkage valve 10, and a double-acting cylinder 6, which are connected in sequence to the rear end of the test chamber air source via air pipes, as well as a three-position five-way valve 7 connected between the test chamber air source and the double-acting cylinder 6; the valve inlet end 20 of the airtight linkage valve 10 is connected to the pressure reducing valve 2, and is used to provide the required life test pressure to the airtight linkage valve 10 through the test chamber air source, ball valve 1, and pressure reducing valve 2;

[0007] The valve top rod 18 of the airtight belt linkage valve 10 is connected to the end of the drive component 13 in the double-acting cylinder 6, and the test chamber air source is connected to the two chambers of the double-acting cylinder 6 through a three-position five-way valve 7. The three-position five-way valve 7 is used to charge and release the double-acting cylinder 6, realize the reciprocating motion of the drive component 13, drive the reciprocating motion of the valve top rod 18, and thus realize the displacement control of the stroke of the airtight belt linkage valve 10.

[0008] Both the airtight belt linkage valve 10 and the double-acting cylinder 6 are fixedly mounted on a fixed fixture. The airtight belt linkage valve 10 is placed inside the temperature chamber through the fixed fixture, so that when the required pressure and valve stroke are applied for the test, the temperature is applied simultaneously using the temperature chamber.

[0009] Optionally, in the life test control system for the airtight belt linkage valve as described above, the test chamber further includes: a pneumatic solenoid valve 8 and a gas cylinder 9;

[0010] The air outlet end 19 of the airtight belt linkage valve 10 is connected to the pneumatic solenoid valve 8 and the gas cylinder 9 respectively, and is used to exhaust the airtight belt linkage valve 10 during the reciprocating motion of the valve top rod 18.

[0011] Optionally, in the life test control system for airtight belt linkage valve as described above, the test chamber further includes: a pressure transmitter 3;

[0012] A pressure transmitter 3 is connected between the pressure reducing valve 2 and the valve inlet end 20 of the airtight belt linkage valve 10 to monitor the gas pressure input to the airtight belt linkage valve 10.

[0013] A pressure transmitter 3 is connected to the valve outlet 19 of the airtight belt linkage valve 10 to monitor the pressure of the gas cylinder 9.

[0014] Optionally, in the life test control system for airtight belt linkage valve as described above, the fixing fixture includes: test bench bracket 11, support assembly 12, support assembly connecting seat 14, screw 15, fixing 16, and bolt 17.

[0015] The cylinder body of the double-acting cylinder 6 is fixedly installed on the test bench support 11. The support assembly 12 is fixedly installed on the test bench support 11. The airtight belt linkage valve 10 is fixedly installed on the boss at one end of the tooling fixing seat 16 by bolts 17. After the drive assembly 13 of the double-acting cylinder 6 passes through the inner hole of the support assembly 12, its extended end is coaxially connected to the valve top rod 18 of the airtight belt linkage valve 10.

[0016] The bottom of the support component 12 is fixedly connected to the support component connecting seat 14, and the other end of the tooling fixing seat 16 is fixedly connected to the support component connecting seat 14 by screws 15. By placing the support component 12 inside the temperature chamber, the airtight belt linkage valve 10 connected to it through the tooling fixing seat 16 is placed inside the temperature chamber.

[0017] Optionally, in the life test control system for the airtight belt linkage valve as described above, the fixed fixture further includes: a counter 4 and a scale 5;

[0018] The counter 4 is installed on the drive assembly 13 of the double-acting cylinder 6 and is used to count the reciprocating motion of the drive assembly 13, that is, to count the reciprocating motion of the valve push rod 18 of the airtight belt linkage valve 10.

[0019] The scale 5 is set on the test bench support 11 and is used to control the displacement of the airtight belt linkage valve 10 when the extension displacement of the drive component 13 in the double-acting cylinder 6 is adjusted by the three-position five-way valve 7.

[0020] Optionally, in the life test control system for the airtight belt linkage valve as described above,

[0021] The test chamber also includes a display and control device that is connected to the ball valve 1, the pressure reducing valve 2, each pressure transmitter 3, the three-position five-way valve 7, the counter 4, the pneumatic solenoid valve 8, and the temperature chamber respectively.

[0022] The display and control device is used to adjust the valves connected to it to control the gas pressure at the valve inlet 20 of the airtight belt linkage valve 10 to reach the pressure required for the life test; it is also used to control the bidirectional reciprocating motion of the drive component 13 in the double-acting cylinder 6 and the stroke of the motion by controlling the three-position five-way valve 7; it is also used to display the pressure at the valve inlet 20, the pressure at the valve outlet 19, and the count value of the counter 4 during the test.

[0023] The beneficial effects of the present invention are as follows: The embodiments of the present invention provide a life test control system for an airtight belt linkage valve, comprising a test chamber and a fixed fixture. On the one hand, the ball valve 1 and the pressure reducing valve 2 connected to the test chamber air source in the test chamber provide the life test required pressure to the airtight belt linkage valve 10. On the other hand, the test chamber air source and the three-position five-way valve 7 realize the inflation and deflation of the double-acting cylinder 6, realize the reciprocating motion of the drive component 13, drive the reciprocating motion of the valve push rod 18 of the airtight belt linkage valve 10, thereby realizing the displacement control of the stroke of the airtight belt linkage valve 10. Furthermore, the fixed fixture sets the airtight belt linkage valve 10 in the temperature chamber, so that when the test required pressure and valve stroke are applied, the temperature is applied simultaneously using the temperature chamber. The life test control system for airtight belt linkage valves provided in this invention can realize the life test of airtight belt linkage valve 10, and simultaneously apply three loads: air pressure, stroke, and temperature during the life test. It also has functions such as stroke counting and displacement measurement during the test. Compared with existing conventional life test devices, it has the following advantages:

[0024] 1) Simultaneous and accurate application of multiple loads: The life test control system can simultaneously apply air pressure, stroke, and temperature loads, ensuring the comprehensiveness and accuracy of the test;

[0025] 2) Automatic control and counting: The life test control system has the function of automatically controlling the valve stroke and pressure, and can realize automatic counting, which improves the efficiency and accuracy of the test and reduces the error of human operation;

[0026] 3) Save human resources: Using this life test control system and corresponding test methods can save human resources, reduce the need for manual operation, improve the degree of automation of the test, and reduce the test cost.

[0027] The application of the life test control system for airtight belt linkage valves provided in this invention will greatly improve the efficiency and reliability of life tests for airtight belt linkage valves. It can be used as a reference in related fields and has good promotional value. Attached Figure Description

[0028] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0029] Figure 1 This is a schematic diagram of the air path in the test chamber section of the life test control system for an airtight belt linkage valve provided in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram showing the arrangement of the double-acting cylinder, test bench support, and support components in the life test control system for an airtight belt linkage valve provided in an embodiment of the present invention.

[0031] Figure 3 This is an exploded view of the connection structure between the fixing device and the test product in the life test control system for an airtight belt linkage valve provided in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Ball valve, 2-Pressure reducing valve, 3-Pressure transmitter, 4-Counter, 5-Scale, 6-Dual-way pneumatic cylinder, 7-Three-position five-way valve, 8-Pneumatic solenoid valve, 9-Gas cylinder, 10-Tested product, i.e., airtight belt linkage valve, 11-Test bench bracket, 12-Support assembly, 13-Drive assembly, 14-Support assembly connector, 15-Screw, 16-Tooling fixing seat, 17-Bolt, 18-Valve top rod, 19-Valve outlet end, 20-Valve inlet end. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0035] The background section has already explained the function of airtight belt-linked valves and the necessity of conducting life tests on them. Existing life tests for airtight belt-linked valves have the following problems: First, the testing equipment cannot simultaneously apply multiple loads such as air pressure, stroke variation, and ambient temperature. Second, during temperature testing, the product is manually placed in a temperature chamber until the specified test temperature is reached, then removed. The valve is then manually pressed to simulate the stroke and number of operations. To prevent changes in the specified temperature, this process needs to be repeated multiple times, and the number of tests must be manually recorded. Clearly, the life test process for airtight belt-linked valves is not only cumbersome but also unable to simultaneously apply multiple operating factors and maintain a constant product temperature. Relying on manual control of the working stroke and recording of the number of operations results in significant errors, affecting the accuracy of the test conclusions.

[0036] To address the aforementioned issues, and considering that the actual operating conditions of airtight valves are simultaneously affected by air pressure, stroke, and ambient temperature, their operational reliability needs to be assessed through lifespan testing, this invention provides a lifespan test control system for airtight valves. This system aims to solve the problem that air pressure, stroke changes, and ambient temperature cannot be simultaneously applied during the lifespan test of airtight valves. Furthermore, the control system features automatic control and automatic counting functions, reducing repetitive manual operations and realistically simulating the equipment's operating conditions.

[0037] The present invention provides the following specific embodiments, which can be combined with each other. For the same or similar concepts or processes, they may not be described again in some embodiments.

[0038] Figure 1 This is a schematic diagram of the air path in the test chamber section of the life test control system for an airtight belt linkage valve provided in an embodiment of the present invention; Figure 2 This is a schematic diagram showing the arrangement of the double-acting cylinder, test bench support, and support components in the life test control system for an airtight belt linkage valve provided in an embodiment of the present invention. Figure 3 This is an exploded view of the connection structure between the fixing device and the test product in the life test control system for an airtight belt linkage valve provided in an embodiment of the present invention.

[0039] Reference Figures 1 to 3 As shown, the life test control system for airtight belt linkage valve provided in this embodiment of the invention mainly includes two parts: a test box and a fixed fixture; the two parts are described below.

[0040] The test chamber in this embodiment of the invention is the pneumatic circuit part of the life test control system. The test chamber includes: a ball valve 1, a pressure reducing valve 2, an airtight linkage valve 10, and a double-acting cylinder 6, which are connected in sequence to the rear end of the test chamber air source via air pipes; and a three-position five-way valve 7 connected between the test chamber air source and the double-acting cylinder 6. The valve inlet end 20 of the airtight linkage valve 10 is connected to the pressure reducing valve 2, and is used to provide the life test required pressure to the airtight linkage valve 10 through the test chamber air source, the ball valve 1, and the pressure reducing valve 2.

[0041] In this embodiment of the invention, the valve top rod 18 of the airtight belt linkage valve 10 is connected to the end of the drive component 13 in the double-acting cylinder 6, and the test chamber air source is connected to the two chambers of the double-acting cylinder 6 through a three-position five-way valve 7, which is used to realize the inflation and deflation of the double-acting cylinder 6 through the three-position five-way valve 7, thereby realizing the reciprocating motion of the drive component 13, driving the reciprocating motion of the valve top rod 18, and thus realizing the displacement control of the stroke of the airtight belt linkage valve 10.

[0042] In this embodiment of the invention, the airtight belt linkage valve 10 and the double-acting cylinder 6 are both fixedly mounted on a fixed fixture. The airtight belt linkage valve 10 is placed inside the temperature chamber by the fixed fixture, so that when the pressure and valve stroke required for the test are applied, the temperature is applied simultaneously by the temperature chamber.

[0043] In one implementation of this invention, such as Figure 1 As shown, the test chamber also includes a pneumatic solenoid valve 8 and a gas cylinder 9. In this implementation, the valve outlet end 19 of the airtight belt linkage valve 10 is connected to the pneumatic solenoid valve 8 and the gas cylinder 9 respectively, which is used to exhaust the airtight belt linkage valve 10 during the reciprocating motion of the valve push rod 18.

[0044] In one implementation of this invention, the test chamber further includes a pressure transmitter 3.

[0045] In this implementation, a pressure transmitter 3 is connected between the pressure reducing valve 2 and the valve inlet 20 of the airtight linkage valve 10 to monitor the gas pressure input to the airtight linkage valve 10. Additionally, a pressure transmitter 3 is connected to the valve outlet 19 of the airtight linkage valve 10 to monitor the pressure of the gas cylinder 9.

[0046] In one implementation of this invention, such as Figure 2 and Figure 3 As shown, the fixed fixture includes: test bench bracket 11, support assembly 12, support assembly connecting seat 14, screw 15, fixing 16, and bolt 17.

[0047] In this implementation, the cylinder body of the double-acting cylinder 6 is fixedly installed on the test bench support 11, and the support assembly 12 is fixedly installed on the test bench support 11. The airtight belt linkage valve 10 is fixedly installed on the boss at one end of the tooling fixing seat 16 by bolts 17. After the drive assembly 13 of the double-acting cylinder 6 passes through the inner hole of the support assembly 12, its extended end is coaxially connected to the valve top rod 18 of the airtight belt linkage valve 10.

[0048] In this implementation, a support component connecting seat 14 is fixedly connected to the bottom of the support component 12, and the other end of the tooling fixing seat 16 is fixedly connected to the support component connecting seat 14 by screws 15. By placing the support component 12 inside the temperature chamber, the airtight belt linkage valve 10 connected to it through the tooling fixing seat 16 is placed inside the temperature chamber.

[0049] In the specific implementation of this method, the fixed fixture also includes: counter 4 and scale 5.

[0050] The counter 4 is installed on the drive assembly 13 of the double-acting cylinder 6 to count the reciprocating motion of the drive assembly 13, that is, to count the reciprocating motion of the valve push rod 18 of the airtight belt linkage valve 10; the scale 5 is installed on the test bench support 11 to realize the displacement control of the stroke of the airtight belt linkage valve 10 when the extension displacement of the drive assembly 13 in the double-acting cylinder 6 is adjusted by the three-position five-way valve 7.

[0051] Furthermore, based on the above embodiments of the present invention, the test chamber also includes: a display and control device that is connected to the ball valve 1, the pressure reducing valve 2, each pressure transmitter 3, the three-position five-way valve 7, the counter 4, the pneumatic solenoid valve 8, and the temperature chamber respectively.

[0052] The display and control device is used to adjust the valves connected to it to control the gas pressure at the valve inlet 20 of the airtight belt linkage valve 10 to reach the pressure required for the life test; it is also used to control the bidirectional reciprocating motion of the drive component 13 in the double-acting cylinder 6 and the stroke of the motion by controlling the three-position five-way valve 7; it is also used to display the pressure at the valve inlet 20, the pressure at the valve outlet 19, and the count value of the counter 4 during the test.

[0053] This invention provides a life test control system for an airtight belt linkage valve, comprising two parts: a test chamber and a fixed fixture. On one hand, a ball valve 1 and a pressure reducing valve 2 connected to a test chamber air source in the test chamber provide the required life test pressure to the airtight belt linkage valve 10. On the other hand, the test chamber air source and a three-position five-way valve 7 enable the inflation and deflation of the double-acting cylinder 6, thereby achieving the reciprocating motion of the drive assembly 13 and driving the reciprocating motion of the valve push rod 18 of the airtight belt linkage valve 10, thus achieving displacement control of the airtight belt linkage valve 10's stroke. Furthermore, the fixed fixture places the airtight belt linkage valve 10 inside a temperature chamber, so that when applying the required test pressure and valve stroke, the temperature is simultaneously applied using the temperature chamber. The life test control system for airtight belt linkage valves provided in this invention can realize the life test of airtight belt linkage valve 10, and simultaneously apply three loads: air pressure, stroke, and temperature during the life test. It also has functions such as stroke counting and displacement measurement during the test. Compared with existing conventional life test devices, it has the following advantages:

[0054] 1) Simultaneous and accurate application of multiple loads: The life test control system can simultaneously apply air pressure, stroke, and temperature loads, ensuring the comprehensiveness and accuracy of the test;

[0055] 2) Automatic control and counting: The life test control system has the function of automatically controlling the valve stroke and pressure, and can realize automatic counting, which improves the efficiency and accuracy of the test and reduces the error of human operation;

[0056] 3) Save human resources: Using this life test control system and corresponding test methods can save human resources, reduce the need for manual operation, improve the degree of automation of the test, and reduce the test cost.

[0057] The application of the life test control system for airtight belt linkage valves provided in this invention will greatly improve the efficiency and reliability of life tests for airtight belt linkage valves. It can be used as a reference in related fields and has good promotional value.

[0058] The following is an illustrative description of the implementation of the life test control system for airtight belt linkage valve provided in the present invention through an implementation example.

[0059] Implementation Example

[0060] Reference Figures 1 to 3 As shown, the life test control system for airtight belt linkage valves provided in this implementation example is generally divided into two parts: a test chamber and a fixture.

[0061] (I) Test Box

[0062] like Figure 1 As shown, the test chamber in this implementation example includes: a ball valve 1, a pressure reducing valve 2, a pressure transmitter 3, a double-acting cylinder 6, a three-position five-way valve 7, a pneumatic solenoid valve 8, a gas cylinder 9, and an airtight belt-linked valve 10; the airtight belt-linked valve 10 is the product under test. This test chamber is used to control the start and stop of the life test control system, and can set the test pressure and number of tests, and has functions such as counting display and pressure display.

[0063] like Figure 1 As shown, one path of the laboratory air source AP passes through ball valve 1, and after being adjusted to the required pressure for the life test by pressure reducing valve 2 and pressure transmitter 3, it enters the valve inlet 20 of the airtight belt linkage valve 10 to achieve pressure control of the tested product; the function of this pressure transmitter 3 is to monitor the inlet charging pressure; another path of the laboratory air source AP passes through three-position five-way valve 7 and enters the double-acting cylinder 6. The three-position five-way valve 7 can realize the charging and decharging of the double-acting cylinder, realizing bidirectional movement, that is, the reciprocating movement of the valve push rod 18. The charging and decharging speed can be adjusted by adjusting the caliper hole to control the cylinder speed and realize the control of the valve stroke displacement.

[0064] In this implementation example, the working principle of the three-position five-way valve 7 is as follows: The valve body of the three-position five-way solenoid valve consists of a base and a piston. The base has three channels: one inlet channel and two outlet channels. The piston has a tiny hole in the center, which can be connected to the inlet channel or the two outlet channels by rotation. By controlling the energization and de-energization of the solenoid coil, the working state of the three-position five-way solenoid valve 7 can be switched, thereby controlling the flow direction and on / off state of the gas.

[0065] In this implementation example, the test chamber also includes a display and control device connected to each valve component and the counter 4 in the fixture. This display and control device is an auxiliary component and is not included in the implementation. Figure 1 The airtight valve 10 is mainly used for system control, parameter acquisition and display. The valve outlet 19 of the airtight valve 10 is connected to the pneumatic solenoid valve 8 to realize the valve's venting function. A pressure transmitter 3 is also installed on this passage, mainly to monitor the pressure of the gas cylinder 9.

[0066] (II) Fixed fixtures

[0067] like Figure 2 and Figure 3 As shown, the fixture in this implementation example includes: test bench bracket 11, support component 12, support component connecting seat 14, screw 15, fixing 16, bolt 17, as well as counter 4 and scale. Its main function is to fix and clamp the product under test and drive component 13, etc.

[0068] In this implementation example, the double-acting cylinder 6 is fixedly mounted on the test bench support 11; the drive component 13 of the double-acting cylinder 6 is inserted into the inner hole of the support component 12, the support component 12 is fixed on the test bench support 11, and the bottom of the support component 12 is fixedly connected to the support component connecting seat 14; the support component 12 is placed in the temperature chamber, and the airtight belt linkage valve 10 is fixedly mounted on the protrusion of one end of the tooling fixing seat 16 by bolts 17, and the other end of the tooling fixing seat 16 is fixedly mounted on the bottom of the support component connecting seat 14 by screws 15, so that the airtight belt linkage valve 10 is placed in the temperature chamber through the tooling fixing seat 16 and the support component 12, so as to achieve the simultaneous application of temperature, stroke and pressure.

[0069] It should be noted that during installation, the airtight linkage valve 10 must ensure that the drive assembly 13 of the double-acting cylinder 6 coincides with the central axis of the valve push rod 18 to guarantee equivalent force transmission. The double-acting cylinder 6 controls the bidirectional movement of the drive assembly 13 through inflation and deflation. The force at the top of the drive assembly 13 acts on the valve push rod 18, realizing the reciprocating motion of the valve push rod 18. A counter 4 arranged on the drive assembly 13 of the double-acting cylinder 6 is used to count the reciprocating motion of the valve push rod 18. The valve inlet 20 is connected to the inlet pipe in the test chamber through an air pipe, and the valve outlet 19 is connected to the gas cylinder 9 through an air pipe. The gas cylinder 9 simulates the airtight belt on an aircraft and is used for venting the airtight linkage valve 10 during the life test.

[0070] The method for performing life tests on airtight belt linkage valves using the life test control system for airtight belt linkage valves provided in the above embodiments of the present invention is as follows:

[0071] After assembling the life test control system according to the test scheme provided in the above implementation example, turn on the temperature chamber and adjust the temperature to the required test temperature T; after the airtight belt linkage valve 10 reaches the required test temperature T, connect the test chamber air source AP to the inlet pipeline of the life test control system. One air source enters the airtight belt linkage valve 10 through ball valve 1, pressure reducing valve 2 and pressure transmitter 3, and controls the air pressure at the valve inlet 20 to reach the test pressure value P; the other air source enters the double-acting cylinder 6 through the three-position five-way valve 7. By adjusting the three-position five-way valve 7, control the bidirectional movement of the double-acting cylinder 6 so that the displacement stroke of the valve push rod 18 of the airtight belt linkage valve 10 meets the test stroke value S; in addition, adjust the counter 4 to the test working cycle number N; the valve outlet 19 of the airtight belt linkage valve 10 is connected to the pneumatic solenoid valve 8 and the gas cylinder 9 to realize the venting function of the valve 10.

[0072] After completing the above settings, the life test of the airtight belt linkage valve 10 can be started. Each cycle counts by 1. During operation, the front panel of the control device in the test box displays the air pressure and the number of cycles. The life test stops when the counter 4 reaches the set number N.

[0073] Through the above specific implementation methods, the life test control system for airtight belt linkage valve provided in this embodiment of the invention can realize the life test of airtight belt linkage valve 10, and simultaneously apply three loads: air pressure, stroke and temperature during the life test, ensuring the consistency between the load during the test and the actual working load, while improving the accuracy, efficiency and reliability of the test.

[0074] While the embodiments disclosed in this invention are as described above, they are merely illustrative of the embodiments to facilitate understanding of the invention and are not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in the form and details of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A life test control system for an airtight belt-linked valve, characterized in that, include: Test chamber and fixture; The test chamber includes a ball valve (1), a pressure reducing valve (2), an airtight linkage valve (10), and a double-acting cylinder (6) connected in sequence to the rear end of the test chamber air source via an air pipe, as well as a three-position five-way valve (7) connected between the test chamber air source and the double-acting cylinder (6); the valve inlet end (20) of the airtight linkage valve (10) is connected to the pressure reducing valve (2) to provide the life test required pressure to the airtight linkage valve (10) through the test chamber air source, the ball valve (1), and the pressure reducing valve (2); The valve top rod (18) of the airtight belt linkage valve (10) is connected to the end of the drive component (13) in the double-acting cylinder (6), and the test chamber air source is connected to the two chambers of the double-acting cylinder (6) through the three-position five-way valve (7) to realize the inflation and deflation of the double-acting cylinder (6) through the three-position five-way valve (7), realize the reciprocating motion of the drive component (13), drive the valve top rod (18) to reciprocate, thereby realize the displacement control of the stroke of the airtight belt linkage valve (10); The airtight belt linkage valve (10) and the double-acting cylinder (6) are both fixedly installed on the fixed fixture. The airtight belt linkage valve (10) is placed in the temperature chamber through the fixed fixture, so that when the pressure and valve stroke required for the test are applied, the temperature is applied simultaneously by using the temperature chamber.

2. The life test control system for an airtight belt-linked valve according to claim 1, characterized in that, The test chamber also includes: a pneumatic solenoid valve (8) and a gas cylinder (9); The valve outlet end (19) of the airtight belt linkage valve (10) is connected to the pneumatic solenoid valve (8) and the gas cylinder (9) respectively, so as to realize the exhaust of the airtight belt linkage valve (10) during the reciprocating motion of the valve top rod (18).

3. The life test control system for an airtight belt-linked valve according to claim 2, characterized in that, The test chamber also includes: a pressure transmitter (3); A pressure transmitter (3) is connected between the pressure reducing valve (2) and the valve inlet end (20) of the airtight belt linkage valve (10) to monitor the gas pressure input to the airtight belt linkage valve (10). A pressure transmitter (3) is connected to the valve outlet end (19) of the airtight belt linkage valve (10) to monitor the pressure of the gas cylinder (9).

4. The life test control system for an airtight belt-linked valve according to any one of claims 1 to 3, characterized in that, The fixed fixture includes: test bench bracket (11), support assembly (12), support assembly connecting seat (14), screw (15), fixture fixing seat (16), and bolt (17). The cylinder body of the double-acting cylinder (6) is fixedly installed on the test bench support (11), and the support assembly (12) is fixedly installed on the test bench support (11). The airtight belt linkage valve (10) is fixedly installed on one end of the tooling fixing seat (16) by bolts (17). After the drive assembly (13) of the double-acting cylinder (6) passes through the inner hole of the support assembly (12), its extended end is coaxially connected with the valve top rod (18) of the airtight belt linkage valve (10). The bottom of the support component (12) is fixedly connected to the support component connecting seat (14), and the other end of the tooling fixing seat (16) is fixedly connected to the support component connecting seat (14) by screws (15). By setting the support component (12) inside the temperature chamber, the airtight belt linkage valve (10) connected to it by the tooling fixing seat (16) is set inside the temperature chamber.

5. The life test control system for an airtight belt-linked valve according to claim 4, characterized in that, The fixed fixture also includes: a counter (4) and a ruler (5); The counter (4) is set on the drive assembly (13) of the double-acting cylinder (6) to count the reciprocating motion of the drive assembly (13), that is, to count the reciprocating motion of the valve push rod (18) of the airtight belt linkage valve (10). The scale (5) is set on the test bench support (11) and is used to control the displacement of the airtight belt linkage valve (10) when the extension displacement of the drive component (13) in the double-acting cylinder (6) is adjusted by the three-position five-way valve (7).

6. The life test control system for an airtight belt-linked valve according to claim 5, characterized in that, The test chamber also includes a display and control device that is connected to the ball valve (1), pressure reducing valve (2), each pressure transmitter (3), three-position five-way valve (7), counter (4), pneumatic solenoid valve (8), and temperature chamber respectively. The display control device is used to adjust the valves connected to it to control the gas pressure at the valve inlet end (20) of the airtight belt linkage valve (10) to reach the pressure required for the life test; it is also used to control the bidirectional reciprocating motion of the drive component (13) in the double-acting cylinder (6) and the motion stroke by controlling the three-position five-way valve (7); it is also used to display the pressure at the valve inlet end (20), the pressure at the valve outlet end (19), and the count value of the counter (4) during the test.

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