Valve inlet pressure testing mechanism

Abstract

The invention relates to the technical field of valve detection, in particular to a valve inlet pressure testing mechanism which comprises a testing valve, and a supporting structure is arranged outside the testing valve. The supporting structure comprises a supporting base, two mounting seats and two butt-joint sealing pipes; the outer surfaces of the two mounting seats are both provided with testing mechanisms communicated with the two butt joint sealing pipes, each testing mechanism comprises a shell, a through pipe, a piston, a limiting strip and an ejector rod, and the through pipe is fixedly communicated between the shell and the air pipe; and a speed regulating mechanism for reciprocating the ejector rod is arranged outside one of the mounting seats and comprises a rotary drum, a mounting outer shell, a mounting inner shell, an elastic telescopic pipe, a roller, a driving motor, a connecting shaft, a transmission gear, a driven gear, a butt joint rod, a regulating gear, a sliding seat, a motor and a rack. The moving speed and pressure of the piston can be adjusted, the testing efficiency and the testing consistency are improved, and then the testing accuracy is enhanced.

Description

Technical Field

[0001] The invention relates to a valve inlet pressure testing mechanism, in particular to a valve inlet pressure testing mechanism, and belongs to the technical field of valve detection. Background Art

[0002] Valves are control components in fluid delivery systems, with functions such as shutoff, regulation, flow diversion, backflow prevention, pressure stabilization, flow diversion or overflow pressure relief. Valves used in fluid control systems come in a wide variety of varieties and specifications, from the simplest shutoff valves to the various valves used in extremely complex automatic control systems. The main detection method is the "visual inspection (bubble) method", which works by moving the fixed valve into a submersible valve test pool filled with liquid, and then ventilating the inside of the valve through an air pipe. The position of the bubbles can effectively determine the valve leak point;

[0003] Chinese invention patent CN115468710 B discloses "an air tightness test device and an air tightness test method, wherein the air tightness test device comprises a base, wherein a fixed block and a moving block are respectively arranged on the left and right sides of the base, wherein the fixed block is fixedly mounted on the left side of the base, wherein a rectangular groove is arranged on the base corresponding to the moving block, wherein the moving block is located in the rectangular groove and is slidably connected thereto, wherein a first threaded rod is arranged in the rectangular groove, wherein one end of the first threaded rod is rotatably connected to the inner wall of the rectangular groove, and the other end of the first threaded rod passes through the base and is provided with a handle fixedly connected thereto, wherein guide rods fixedly connected to the inner wall of the rectangular groove are arranged on both sides of the first threaded rod, wherein a sealing assembly for fixing and sealing the valve is arranged on the moving block and the fixed block, and a test assembly for testing the air tightness of the valve is arranged on the outer sides of the two sealing assemblies";

[0004] The above patent has the following defects: it moves the second piston downward in the second air chamber by rotating the second threaded rod 23 up and down. Although this method can realize the sealing detection, the test speed of the device is not adjustable. The rotation speed of the second threaded rod (that is, the movement speed of the piston) is fixed, which may cause the test time to be too long or too short, affecting the test efficiency and accuracy. In addition, since the test speed is not adjustable, there may be differences in tests performed by different operators or at different times, resulting in poor consistency in the test results.

[0005] Therefore, there is an urgent need to improve the testing organization to solve the above-mentioned problems. Summary of the invention

[0006] The purpose of the present invention is to provide a valve inlet pressure testing mechanism with an adjustable piston movement speed, which improves test efficiency and test consistency and thus enhances test accuracy, and effectively solves the above-mentioned problems.

[0007] To achieve the above object, the main technical solutions adopted by the present invention include: a valve inlet pressure testing mechanism, including a testing valve, and a support structure is arranged outside the testing valve;

[0008] The support structure includes a support base, two mounting seats and two docking seal tubes. One side of each of the two docking seal tubes close to the support base is fixedly communicated with an air pipe;

[0009] Testing mechanisms communicated with the two docking seal tubes are arranged on the outer surfaces of the two mounting seats. The testing mechanism includes a housing, a piston, a limiting strip and a push rod. An air chamber and a ventilation hole are formed inside the housing, and a through pipe is fixedly communicated between the housing and the air pipe;

[0010] A speed regulating mechanism for reciprocating the push rod is arranged outside one of the mounting seats. The speed regulating mechanism includes a rotating cylinder, a mounting outer shell, a mounting inner shell, an elastic telescopic tube, a roller, a driving motor, a connecting shaft, a driving gear, a driven gear, a docking rod, an adjusting gear, a sliding seat, a motor and a rack.

[0011] Preferably, sealing sleeves are sleeved on the outer surfaces of the two docking seal tubes, and the outer shape of the docking seal tube is conical.

[0012] Preferably, an adjusting structure for displacing the left mounting seat is arranged inside the support base. The adjusting structure includes a knob, a screw rod and a slider. An installation chute communicated with the upper surface is formed inside the support base. The slider is slidably arranged in the installation chute, and the left mounting seat is fixedly installed on the upper surface of the slider. One end of the screw rod is rotatably connected to the inside of the installation chute, the other end of the screw rod is fixed to the knob, and the slider is in threaded connection with the screw rod.

[0013] Preferably, the number of the limiting strips is two, and the two limiting strips are distributed up and down. The outer shape of the limiting strip is in a shape of a Chinese character 'hui' with a hollow middle. The piston is located between the two limiting strips, and the push rod extends to the outside of the housing.

[0014] Preferably, an inclined chute communicated with the outer surface is formed inside the rotating cylinder. The roller is in rolling connection with the inner wall of the inclined chute. One end of the elastic telescopic tube is connected to the roller by a bearing, and the other end of the elastic telescopic tube extends into the inside of the mounting inner shell and is fixed to the sliding seat.

[0015] Preferably, the mounting inner shell is reciprocally arranged inside the mounting outer shell. A through opening communicated with the outside is formed on one side of the mounting outer shell close to the rotating cylinder. The elastic telescopic tube penetrates through the through opening and extends to the outside of the mounting outer shell. An extension opening communicated with the outside is formed inside the mounting inner shell, and a guide block for limiting the sliding seat is installed on the inner wall of the mounting inner shell.

[0016] Preferably, the number of the oblique chutes, elastic telescopic tubes, rollers, docking rods, sliding seats and racks is two. Among them, the two oblique chutes are symmetrically arranged up and down, two sliding seats are provided, the two racks are fixedly installed between the two sliding seats, and the adjusting gear meshes with the two racks.

[0017] Preferably, the outer shape of the oblique chute is V-shaped. The two docking rods are respectively fixedly installed on the upper and lower sides of the inner installation shell, and both of the two docking rods extend to the outside of the installation shell. The bottom docking rod is flange-connected to the top rod.

[0018] Preferably, a second buffer spring fixed to the upper surface of the shell and the lower surface of the flange is wound around the outer surface of the top rod. The connecting shaft is fixedly installed on the lower surface of the rotating cylinder. The driving gear is fixedly installed on the output shaft of the driving motor. The driven gear is fixedly installed on the outer surface of the connecting shaft, and the driven gear meshes with the driving gear.

[0019] Preferably, a guiding structure for limiting the inner installation shell is arranged inside the installation shell. The guiding structure includes two installation platforms distributed up and down, a guide rod fixedly installed between the two installation platforms, a sliding sleeve slidably sleeved on the outer surface of the guide rod, and a first buffer spring fixedly installed between the sliding sleeve and the top installation platform. The inner installation shell is fixed to the outer surface of the sliding sleeve;

[0020] A fixing frame for supporting the driving motor and the connecting shaft is welded on the outer surface of the right installation seat.

[0021] The present invention has at least the following beneficial effects:

[0022] 1. For this valve inlet pressure testing mechanism, through the reciprocating movement of two equivalent air chambers and pistons, it can ensure that the test valve works under uniform and controllable pressure, so as to accurately judge whether the air tightness of the valve is qualified. The pistons move the same distance in the two air chambers, which is convenient for observing and comparing the situations in the two air chambers and improves the accuracy of the test.

[0023] 2. For this valve inlet pressure testing mechanism, by driving the rotation of the adjusting gear with a motor, the alternating movement of the installation positions of the two sliding seats, namely the rollers, can be easily adjusted, so that the upper roller and the lower roller are in contact with and separated from the oblique chute, thereby realizing the precise adjustment of the reciprocating amplitude of the piston, providing more flexibility and precision for the adjustment, and enabling the test process to be adjusted according to needs;

[0024] 3. The valve inlet pressure testing mechanism can precisely control the pressure change in the air chamber by adjusting the reciprocating depth of the piston. When testing the airtightness of the valve, different working pressure environments need to be simulated. By adjusting the reciprocating depth of the piston, the required pressure level can be accurately achieved, thus ensuring the accuracy of the test. Observe the piston movement: The piston moves the same distance in two identical air chambers, making it easier to observe the movement of the piston. By observing the movement state of the piston (such as whether it jams or leaks), the airtightness of the tested valve can be intuitively judged, and at the same time, the flexibility and adaptability of the test can be enhanced; it can adapt to test valves of different sizes.

[0025] 3. The valve inlet pressure testing mechanism makes the drive of the rotating cylinder more efficient and stable through the transmission cooperation of the drive motor, driving gear and driven gear, thereby improving the efficiency of the test process. And by adjusting the rotation speed of the drive motor, the test process can be accelerated or slowed down to meet different test requirements, further improving the test efficiency.

[0026] 4. The valve inlet pressure testing mechanism can better accommodate test valves of different diameters through two butt-sealing pipes with a conical shape and the installation of a sealing sleeve. The sealing sleeve can increase the fitting and sealing effect, effectively improving the test applicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0028] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 is a schematic diagram of the support structure of the present invention;

[0030] Figure 3 is a schematic diagram of the structure of the sealing sleeve of the present invention;

[0031] Figure 4 is a structural sectional view of the testing mechanism of the present invention;

[0032] Figure 5 is a schematic diagram of the overall structure of the speed regulation mechanism of the present invention;

[0033] Figure 6 is a structural sectional view of the installation housing of the present invention;

[0034] Figure 7 is a front view of the installation inner housing of the present invention;

[0035] Figure 8Structural schematic diagram of the inclined chute of the present invention;

[0036] Figure 9 Structural schematic diagram of the guiding structure of the present invention.

[0037] In the figure, 1, test valve; 2, support structure; 21, support base; 22, mounting seat; 23, docking seal pipe; 24, seal sleeve; 25, air pipe; 3, adjustment structure; 31, knob; 32, screw rod; 33, slider; 34, mounting chute; 4, test mechanism; 41, housing; 42, air chamber; 43, ventilation hole; 44, through pipe; 45, piston; 46, limiting strip; 47, ejector rod; 5, speed regulation mechanism; 51, rotating cylinder; 52, inclined chute; 53, mounting outer shell; 54, mounting inner shell; 55, elastic telescopic pipe; 56, roller; 57, drive motor; 58, connecting shaft; 59, transmission gear; 510, driven gear; 511, docking rod; 512, adjusting gear; 513, sliding seat; 514, motor; 515, rack; 516, guide block; 517, through hole; 518, extension port; 519, guiding structure; 5191, mounting table; 5192, guide rod; 5193, sliding sleeve; 5194, first buffer spring; 520, second buffer spring; 6, fixing frame. Detailed implementation manners

[0038] The following will cooperate with the drawings and embodiments to elaborate in detail on the implementation manners of the present application, so as to fully understand how the present application uses technical means to solve technical problems and achieve the realization process of technical effects and implement accordingly.

[0039] As Figure 1 - Figure 3 shown, the valve inlet pressure test mechanism provided in this embodiment includes a test valve 1, and a support structure 2 is arranged outside the test valve 1; the support structure 2 includes a support base 21, two mounting seats 22 and two docking seal pipes 23, and two air pipes 25 are fixedly communicated with one side of the two docking seal pipes 23 close to the support base 21; seal sleeves 24 are sleeved and installed on the outer surfaces of the two docking seal pipes 23, and the outer shape of the docking seal pipe 23 is conical. The conical design of the docking seal pipe 23 can well adapt to test valves 1 with different diameters. This design enables the docking seal pipe 23 to more easily align with the port of the test valve 1 and fit tightly, regardless of the diameter size of the test valve.

[0040] Specifically, the installation of the seal sleeve 24 further enhances the fitting and sealing effect. The seal sleeve 24 is usually made of an elastic material and can tightly wrap the contact surface between the test valve 1 and the docking seal pipe 23, effectively preventing the leakage of gas or liquid.

[0041] In this embodiment, an adjusting structure 3 for displacing the left mounting seat 22 is provided inside the support base 21. The adjusting structure 3 includes a knob 31, a screw rod 32, and a slider 33. An installation chute 34 communicating with the upper surface is formed inside the support base 21. The slider 33 is slidably disposed in the installation chute 34, and the left mounting seat 22 is fixedly installed on the upper surface of the slider 33. One end of the screw rod 32 is rotatably connected to the inside of the installation chute 34, the other end of the screw rod 32 is fixed to the knob 31, and the slider 33 is threadedly connected to the screw rod 32. By moving the docking seal pipe 23 through the adjusting structure 3, the connection with the test valve 1 can be conveniently achieved. This design makes the test process more flexible and efficient, reducing the complexity and time cost of manual operation.

[0042] In this embodiment, as Figure 4 and Figure 5 shown, a test mechanism 4 communicating with the two docking seal pipes 23 is provided on the outer surfaces of the two mounting seats 22. The test mechanism 4 includes a housing 41, a piston 45, a limiting strip 46, and a push rod 47. An air chamber 42 and a ventilation hole 43 are formed inside the housing 41. A connecting pipe 44 is fixedly connected between the housing 41 and the air pipe 25.

[0043] Specifically, the number of the limiting strips 46 is two, and the two limiting strips 46 are distributed vertically. The outer shape of the limiting strip 46 is in a shape of a double-square frame with a hollow middle. The piston 45 is located between the two limiting strips 46, and the push rod 47 extends to the outside of the housing 41. The top of the left housing 41 is hollow, and observation windows are provided on the sides of the two housings 41.

[0044] During the test, the right piston 45 is reciprocated. Through the arrangement of the limiting strips 46 in the two air chambers 42, the two pistons 45 can move the same distance in the two equivalent air chambers 42 respectively, which is convenient for observing the pistons 45 in the two air chambers 42, so as to judge whether the air tightness of the test valve 1 is qualified.

[0045] In this embodiment, as Figure 5 - Figure 9As shown, a speed regulating mechanism 5 for reciprocating the opposing push rod 47 is provided outside one of the mounting seats 22. The speed regulating mechanism 5 includes a rotating cylinder 51, a mounting outer shell 53, a mounting inner shell 54, an elastic telescopic tube 55, a roller 56, a driving motor 57, a connecting shaft 58, a transmission gear 59, a driven gear 510, a docking rod 511, an adjusting gear 512, a sliding seat 513, a motor 514, and a rack 515. An inclined chute 52 communicating with the outer surface is formed inside the rotating cylinder 51. The roller 56 is in rolling connection with the inner wall of the inclined chute 52. One end of the elastic telescopic tube 55 is in bearing connection with the roller 56, and the other end of the elastic telescopic tube 55 extends into the mounting inner shell 54 and is fixed to the sliding seat 513. The mounting inner shell 54 is reciprocally arranged inside the mounting outer shell 53. A through opening 517 communicating with the outside is formed on one side of the mounting outer shell 53 close to the rotating cylinder 51. The elastic telescopic tube 55 passes through the through opening 517 and extends to the outside of the mounting outer shell 53. An extension opening 518 communicating with the outside is formed inside the mounting inner shell 54. A guide block 516 for limiting the sliding seat 513 is mounted on the inner wall of the mounting inner shell 54.

[0046] When this embodiment is in use, the adjusting gear 512 is driven to rotate by the motor 514. The adjusting gear 512 meshes with the two racks 515, causing the two sliding seats 513 to move alternately, so that the upper and lower rollers 56 can be adjusted. When the upper roller 56 is in contact with the inclined chute 52, the lower roller 56 is separated from the inclined chute 52. On the contrary, when the upper roller 56 is separated from the inclined chute 52, the lower roller 56 is in contact with the inclined chute 52, thereby adjusting the reciprocating amplitude of the piston 45.

[0047] It can be understood that adjusting the reciprocating depth of the piston 45 has the following advantages: First, it improves the accuracy and reliability of the test; precisely controls the pressure: The reciprocating depth of the piston 45 can precisely control the pressure change in the air chamber 42. When testing the airtightness of the valve 1, it is necessary to simulate different working pressure environments. By adjusting the reciprocating depth of the piston 45, the required pressure level can be accurately achieved, thereby ensuring the accuracy of the test.

[0048] Observe the movement of piston 45: The piston 45 moves the same distance within two identical air chambers 42, making it easier to observe the movement of the piston 45. By observing the movement state of the piston 45 (such as whether it jams or leaks), it is possible to intuitively judge whether the airtightness of the test valve 1 is qualified. Second, enhance the flexibility and adaptability of the test; Adapt to test valves 1 of different sizes: By adjusting the reciprocating depth of the piston 45, it is possible to adapt to test valves 1 of different sizes. Test valves 1 of different sizes may require different test pressures and test times. By adjusting the reciprocating depth of the piston 45, the test parameters can be flexibly adjusted to meet the requirements of different test valves 1. Simulate actual working conditions: During actual use, the test valve 1 may be affected by different working conditions and environmental factors. By adjusting the reciprocating depth of the piston 45, different actual working conditions can be simulated, such as different pressure fluctuations and temperature changes, so as to more comprehensively evaluate the airtightness of the test valve 1. Third, optimize the test efficiency and reduce costs; Reduce the test time: By precisely adjusting the reciprocating depth of the piston 45, the test process can be optimized and unnecessary test time can be reduced. For example, in the preliminary test stage, a shallower reciprocating depth can be used for rapid screening; in the confirmation test stage, a deeper reciprocating depth can be used for precise verification. Reduce energy consumption and wear: Precisely adjusting the reciprocating depth of the piston 45 can also reduce energy consumption and equipment wear. An overly deep reciprocating depth may lead to increased energy consumption and aggravated equipment wear; while an overly shallow reciprocating depth may not fully test the airtightness of the valve 1. By precise adjustment, the optimal reciprocating depth can be found to achieve a balance between energy consumption and wear.

[0049] Fourth, improve the safety and stability of the equipment; Prevent overpressure and leakage: Adjusting the reciprocating depth of the piston 45 can prevent safety hazards such as overpressure and leakage. During the test, if the reciprocating depth of the piston 45 is too large, it may cause the pressure in the air chamber 42 to be too high, thus triggering an overpressure risk; if the reciprocating depth of the piston 45 is too small, it may not fully seal the test valve 1, resulting in a leakage risk. By precisely adjusting the reciprocating depth of the piston 45, the safety and stability of the test process can be ensured. Protect the test equipment: Precisely adjusting the reciprocating depth of the piston 45 can also protect the test equipment from damage. An overly deep reciprocating depth may cause excessive impact and wear on the structure and components of the test equipment; while an overly shallow reciprocating depth may not fully test the performance of the equipment. By precisely adjusting the reciprocating depth of the piston 45, it can be ensured that the test equipment operates within a safe range and the service life of the equipment can be extended.

[0050] Specifically, the numbers of the inclined chute 52, the elastic telescopic tube 55, the roller 56, the docking rod 511, the sliding seat 513, and the rack 515 are all two. Among them, the two inclined chutes 52 are symmetrically arranged up and down, the two sliding seats 513 are provided, the two racks 515 are fixedly installed between the two sliding seats 513, and the adjusting gear 512 meshes with the two racks 515. By the transmission cooperation of the driving motor 57, the transmission gear 59, and the driven gear 510, the test process can be accelerated or decelerated as needed, thereby improving the test efficiency. The transmission gear 59 and the driven gear 510 are of different sizes.

[0051] It should be noted that the outer shape of the inclined chute 52 is V-shaped. The two docking rods 511 are respectively fixedly installed on the upper and lower sides of the installation inner shell 54, and both of the two docking rods 511 extend to the outside of the installation outer shell 53. The bottom docking rod 511 is flange-connected to the top rod 47. The top docking rod 511 allows the staff to observe a movement state of the installation inner shell 54 from the outside, realizing the detection function. The motor 514 is fixedly installed on the outer surface of the installation inner shell 54.

[0052] As Figure 5 shown, a second buffer spring 520 that is fixed to the upper surface of the housing 41 and the lower surface of the flange is wound around the outer surface of the top rod 47. Through the installation of the second buffer spring 520, the reciprocation of the installation inner shell 54 can be buffered, improving the service life of the equipment. The connecting shaft 58 is fixedly installed on the lower surface of the rotating cylinder 51. The transmission gear 59 is fixedly installed on the output shaft of the driving motor 57. The driven gear 510 is fixedly installed on the outer surface of the connecting shaft 58, and the driven gear 510 meshes with the transmission gear 59.

[0053] As Figure 9 shown, a guiding structure 519 for limiting the installation inner shell 54 is arranged inside the installation outer shell 53. The guiding structure 519 includes two installation platforms 5191 distributed up and down, a guide rod 5192 fixedly installed between the two installation platforms 5191, a sliding sleeve 5193 slidably sleeved on the outer surface of the guide rod 5192, and a first buffer spring 5194 fixedly installed between the sliding sleeve 5193 and the top installation platform 5191. The installation inner shell 54 is fixed to the outer surface of the sliding sleeve 5193; a fixing bracket 6 for supporting the driving motor 57 and the connecting shaft 58 is welded on the outer surface of the right installation seat 22. The driving motor 57 is fixedly installed on the lower surface of the fixing bracket 6. The connecting shaft 58 is connected to the bearing inside the fixing bracket 6.

[0054] As Figure 1 - Figure 9 shown, the principle of the valve inlet pressure testing mechanism provided in this embodiment is as follows:

[0055] When the present invention is in use, one end of the test valve 1 is connected to the docking seal pipe 23, and then the other docking seal pipe 23 is moved through the adjustment structure 3 to communicate with the other end of the test valve 1. The two docking seal pipes 23 are arranged in a conical shape, and with the installation of the sealing sleeve 24, it can better indicate test valves 1 with different diameters. The sealing sleeve 24 can enhance the fitting and sealing effect. Then, the controller is operated to start the speed regulation mechanism 5 to reciprocate the right piston 45. Through the arrangement of the limiting strips 46 in the two air chambers 42, the two pistons 45 can move the same distance in the two equivalent air chambers 42 respectively, which is convenient for observing the pistons 45 in the two air chambers 42, so as to determine whether the air tightness of the test valve 1 is qualified.

[0056] When adjustment is needed, the motor 514 drives the adjustment gear 512 to rotate. The adjustment gear 512 meshes with the two racks 515, causing the two sliding seats 513 to move alternately, so as to adjust the upper and lower rollers 56. When the upper roller 56 fits with the inclined chute 52, the lower roller 56 disengages from the inclined chute 52. On the contrary, when the upper roller 56 disengages from the inclined chute 52, the lower roller 56 fits with the inclined chute 52, thereby adjusting the reciprocating amplitude of the piston 45. Then, through the transmission cooperation of the drive motor 57, the transmission gear 59 and the driven gear 510, the rotating cylinder 51 is driven. Then, through the installation of the rollers 56, the inclined chute 52 and the elastic telescopic tube 55, a reciprocating drive of the piston 45 is realized. At the same time, through the transmission cooperation of the drive motor 57, the transmission gear 59 and the driven gear 510, the test process can be accelerated or decelerated as needed, so as to improve the test efficiency.

[0057] As certain terms are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different nouns to refer to the same component. The specification and claims do not use the difference in names as a way to distinguish components, but use the difference in functions of components as the criterion for distinction. As the term "comprising" mentioned throughout the specification and claims is an open-ended term, it should be interpreted as "including but not limited to". "Substantially" means within an acceptable error range. Those skilled in the art can solve technical problems within a certain error range and basically achieve the technical effect.

[0058] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a commodity or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to this commodity or system. Without more limitations, the element defined by the statement "including one..." does not exclude the existence of another identical element in the commodity or system including the element.

[0059] The foregoing description has shown and described several preferred embodiments of the present invention. However, as previously mentioned, it should be understood that the present invention is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the techniques or knowledge in related fields. Any changes and variations made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A valve inlet pressure testing mechanism, comprising a test valve (1), characterized in that: The outside of the test valve (1) is provided with a support structure (2); The support structure (2) includes a support base (21), two mounting seats (22) and two docking seal tubes (23). One side of each of the two docking seal tubes (23) close to the support base (21) is fixedly communicated with an air pipe (25); The outer surfaces of the two mounting seats (22) are both provided with a test mechanism (4) communicated with the two docking seal tubes (23). The test mechanism (4) includes a housing (41), a piston (45), a limiting strip (46) and a push rod (47). An air cavity (42) and a ventilation hole (43) are formed inside the housing (41). A through pipe (44) is fixedly communicated between the housing (41) and the air pipe (25); One of the mounting seats (22) is externally provided with a speed regulation mechanism (5) for reciprocating the push rod (47). The speed regulation mechanism (5) includes a rotary cylinder (51), a mounting outer shell (53), a mounting inner shell (54), an elastic telescopic tube (55), a roller (56), a driving motor (57), a connecting shaft (58), a driving gear (59), a driven gear (510), a docking rod (511), an adjusting gear (512), a sliding seat (513), a motor (514) and a rack (515).

2. A valve inlet pressure testing mechanism according to claim 1, characterized in that: Sealing sleeves (24) are sleeved and installed on the outer surfaces of the two docking seal tubes (23). The outer shape of the docking seal tube (23) is conical.

3. A valve inlet pressure testing mechanism according to claim 1, characterized in that: An adjusting structure (3) for displacing the left mounting seat (22) is arranged inside the support base (21). The adjusting structure (3) includes a knob (31), a screw rod (32) and a slider (33). An installation chute (34) communicated with the upper surface is formed inside the support base (21). The slider (33) is slidably arranged in the installation chute (34). The left mounting seat (22) is fixedly installed on the upper surface of the slider (33). One end of the screw rod (32) is rotatably connected to the inside of the installation chute (34). The other end of the screw rod (32) is fixed to the knob (31). The slider (33) is in threaded connection with the screw rod (32).

4. A valve inlet pressure testing mechanism according to claim 1, characterized in that: The number of the limiting strips (46) is two, and the two limiting strips (46) are distributed up and down. The outer shape of the limiting strip (46) is in a shape of a Chinese character 'hui' with a hollow middle. The piston (45) is located between the two limiting strips (46). The push rod (47) extends to the outside of the housing (41).

5. A valve inlet pressure testing mechanism according to claim 1, characterized in that: An inclined chute (52) communicated with the outer surface is formed inside the rotary cylinder (51). The roller (56) is in rolling connection with the inner wall of the inclined chute (52). One end of the elastic telescopic tube (55) is in bearing connection with the roller (56), and the other end of the elastic telescopic tube (55) extends into the inside of the mounting inner shell (54) and is fixed to the sliding seat (513).

6. A valve inlet pressure testing mechanism according to claim 1, characterized in that: The mounting inner shell (54) is movably reciprocatingly arranged inside the mounting outer shell (53); a through hole (517) communicating with the outside is provided on a side of the mounting outer shell (53) close to the rotating drum (51); the elastic telescopic tube (55) passes through the through hole (517) and extends to the outside of the mounting outer shell (53); an extension hole (518) communicating with the outside is provided inside the mounting inner shell (54); and a guide block (516) for limiting the sliding seat (513) is installed on the inner wall of the mounting inner shell (54).

7. A valve inlet pressure testing mechanism according to claim 5, characterized in that: The number of the oblique slide groove (52), the elastic telescopic tube (55), the roller (56), the docking rod (511), the slide seat (513) and the rack (515) is two, wherein the two oblique slide grooves (52) are symmetrically arranged up and down, the two slide seats (513) are arranged, the two racks (515) are fixedly installed between the two slide seats (513), and the adjusting gear (512) is meshed with the two racks (515).

8. A valve inlet pressure testing mechanism according to claim 7, characterized in that: The oblique slide groove (52) is V-shaped in shape, and the two docking rods (511) are respectively fixedly mounted on the upper and lower sides of the mounting inner shell (54), and the two docking rods (511) extend to the outside of the mounting outer shell (53), and the bottom docking rod (511) is flange-connected to the top rod (47).

9. A valve inlet pressure testing mechanism according to claim 8, characterized in that: The outer surface of the push rod (47) is wound with a second buffer spring (520) fixed to the upper surface of the shell (41) and the lower surface of the flange, the connecting shaft (58) is fixedly mounted on the lower surface of the rotating drum (51), the transmission gear (59) is fixedly mounted on the output shaft of the driving motor (57), the driven gear (510) is fixedly mounted on the outer surface of the connecting shaft (58), and the driven gear (510) is meshed with the transmission gear (59).

10. A valve inlet pressure testing mechanism according to claim 1, characterized in that: A guide structure (519) for limiting the position of the mounting inner shell (54) is arranged inside the mounting outer shell (53), and the guide structure (519) comprises two mounting platforms (5191) distributed up and down, a guide rod (5192) fixedly mounted between the two mounting platforms (5191), a sliding sleeve (5193) slidably sleeved on the outer surface of the guide rod (5192), and a first buffer spring (5194) fixedly mounted between the sliding sleeve (5193) and the top mounting platform (5191), and the mounting inner shell (54) is fixed to the outer surface of the sliding sleeve (5193); A fixing frame (6) supporting the driving motor (57) and the connecting shaft (58) is welded to the outer surface of the mounting seat (22) on the right side.

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