Verification tool for verifying valve element of liquid hydrogen regulating valve
By designing verification tooling for liquid hydrogen regulating valves, the problem of valve core seal verification is solved, and separate verification is achieved before leaving the factory, reducing R&D costs and cycles.
Patent Information
- Application Number
- CN202411612776.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-02-28
AI Technical Summary
Before assembly of the liquid hydrogen regulating valve, the sealing verification of the valve core is difficult, resulting in the fact that the dimensions do not meet the sealing requirements after assembly, and the valve core needs to be removed and replaced, which increases the cost and R&D cycle.
A verification tool is designed, including a protective shell, a control rod, a valve core connecting assembly and a verification shell. The valve core is driven to move the valve core in the verification shell through the adjustment rod, and the sealing performance of the valve core is detected by the design of the verification port and the inlet and outlet.
It realizes separate pre-factory verification of valve core sealing performance, reduces R&D costs and cycles, and avoids high cost and long-term valve core verification in the entire valve state.
Smart Images
Figure CN119533802A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of valve verification technology, and in particular to a verification tool for verifying a valve core of a liquid hydrogen regulating valve. Background Art
[0002] Liquid hydrogen control valves are used for opening and closing control and flow regulation of liquid hydrogen media in large-scale low-temperature refrigeration systems. The size of the valve core in the liquid hydrogen temperature range has a significant impact on the reliable sealing of the valve core of the control valve. If the sealing of the valve core is not verified before the assembly of the liquid hydrogen control valve, and it is directly assembled in the control valve, if it is found that the size of the valve core does not meet the sealing requirements during the operation of the entire valve, the valve will need to be disassembled and the valve core will need to be replaced later. Therefore, in order to reduce assembly costs and shorten the R&D cycle, it is necessary to develop a verification tooling that can carry out sealing performance tests on valve core parts. Summary of the invention
[0003] In view of this, the present application proposes a verification tool for verifying the valve core of a liquid hydrogen regulating valve.
[0004] According to one aspect of the present application, a verification tool for verifying a valve core of a liquid hydrogen regulating valve is provided, comprising: a protective shell, a regulating rod, a valve core linkage assembly and a verification shell;
[0005] The protective shell is provided with a cavity with an opening at one end, the adjusting rod penetrates the protective shell and is connected with the valve core linkage assembly, and the valve core linkage assembly is movably arranged inside the cavity of the protective shell through the adjusting rod;
[0006] The verification shell is provided with a cavity suitable for placing the valve core, and an opening is opened at one end of the cavity of the verification shell, and the open end of the protection shell is detachably connected to the open end of the verification shell;
[0007] A verification port is provided inside the cavity of the verification shell, and the verification port matches the verification end of the valve core so that the verification end of the valve core can be embedded in the verification port;
[0008] The verification shell is provided with an inlet and an outlet, and the inlet and the outlet are opened on opposite sides relative to the verification port, so that when the verification end of the valve core is embedded in the verification port, the inlet and the outlet are not connected, and when the verification end of the valve core leaves the verification port, the inlet and the outlet are connected;
[0009] The regulating rod is connected to the valve core through a valve core linkage assembly, and is suitable for driving the valve core to move in a direction toward or away from the verification port.
[0010] In a possible implementation, the valve core linkage assembly includes: an upper spring seat, a spring and a lower spring seat;
[0011] The upper spring seat is elastically connected to the lower spring seat through a spring.
[0012] In a possible implementation, a spring connection portion is protrudingly provided on the outer side of the upper spring seat, and a spring connection portion is also protrudingly provided on the outer side of the lower spring seat;
[0013] Two ends of the spring are respectively in contact with the spring connecting portion of the upper spring seat and the spring connecting portion of the lower spring seat.
[0014] In a possible implementation, the adjusting rod passes through the protective shell and is fixedly connected to the upper spring seat, and the adjusting rod and the protective shell are threadedly connected.
[0015] In a possible implementation, the upper spring seat is provided with a connecting groove, and one end of the adjusting rod connected to the upper spring seat is provided with a connecting protrusion, and the connecting protrusion is embedded in the connecting groove.
[0016] In a possible implementation, a first fixing flange is protruded from the open end of the protection shell, and a second fixing flange is protruded from the open end of the verification shell; the first fixing flange is connected to the second fixing flange via a fixing assembly.
[0017] In a possible implementation, the inlet is arranged opposite to the open end of the verification shell, and the outlet is arranged on the side wall of the verification shell.
[0018] In a possible implementation, a pipe joint is provided at the outlet of the verification shell.
[0019] Beneficial effect: During the verification process, when one end of the valve core is fully embedded in the verification port, some gas or liquid overflows from the outlet after gas or liquid is introduced from the inlet, indicating that the valve core does not completely seal the verification port, which largely indicates that there is wear or notch on the surface of the valve core, and its size does not meet the factory specifications, etc. This application can verify the sealing performance of the valve core parts of the regulating valve separately before leaving the factory, reducing R&D costs and shortening R&D cycles; avoiding the high cost and long cycle of valve core verification in the whole valve state.
[0020] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.
[0022] Figure 1 A cross-sectional view showing a verification tool for verifying a valve core of a liquid hydrogen regulating valve according to an embodiment of the present application;
[0023] Figure 2 A cross-sectional view showing a verification tool for verifying a valve core of a liquid hydrogen regulating valve according to an embodiment of the present application;
[0024] Figure 3 A main structural diagram of a verification tool for verifying a valve core of a liquid hydrogen regulating valve according to an embodiment of the present application is shown;
[0025] Figure 4 A main structural diagram of an upper spring seat according to an embodiment of the present application is shown;
[0026] Figure 5 A main structural diagram of a lower spring seat according to an embodiment of the present application is shown;
[0027] Figure 6 A main structural diagram of an upper housing according to an embodiment of the present application is shown;
[0028] Figure 7 A main structural diagram of a valve core of a liquid hydrogen regulating valve adapted and verified in an embodiment of the present application is shown;
[0029] Figure 8 A main structural diagram of a connector according to an embodiment of the present application is shown;
[0030] Fig. 9 A partial enlarged view of an embodiment of the present application is shown;
[0031] Fig.10 A main structural diagram of the lower housing of an embodiment of the present application is shown;
[0032] Fig.11 A main structural diagram of an adjusting rod according to an embodiment of the present application is shown;
[0033] Fig.12 A main structural diagram of a protective shell according to an embodiment of the present application is shown;
[0034] Fig.13 A partial enlarged view of an embodiment of the present application is shown;
[0035] Fig.14 A partial enlarged view of an embodiment of the present application is shown;
[0036] Fig.15 A partial enlarged view of an embodiment of the present application is shown;
[0037] Fig.16 A partial enlarged view of an embodiment of the present application is shown;
[0038] Fig.17 A local enlarged view of an embodiment of the present application is shown.
[0039] Protective shell 100, upper spring seat 200, spring 700, lower spring seat 300, adjusting rod 400, valve core 500, verification shell 600, inlet 621, outlet 613, rotating part 410, verification port 622, probe rod 220, limit block 230, limit hole 330, connecting piece 900, first locking hole 910, second locking hole 920, first latch 930, second latch 940, first fixing flange 120, second fixing flange 612, third fixing flange 110, fourth fixing flange 810. DETAILED DESCRIPTION
[0040] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.
[0041] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0043] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.
[0044] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.
[0045] Figure 1A cross-sectional view of a verification tool for verifying a valve core of a liquid hydrogen regulating valve according to an embodiment of the present application is shown. Figure 1 As shown, the verification tooling suitable for verifying the valve core 500 of the liquid hydrogen regulating valve comprises: a protective shell 100, an adjusting rod 400, a valve core linkage assembly and a verification shell 600; the protective shell 100 is provided with a cavity with an opening at one end, the adjusting rod 400 penetrates the protective shell 100 and is connected with the valve core linkage assembly, and the valve core linkage assembly is movably arranged inside the cavity of the protective shell 100 through the adjusting rod 400; the verification shell 600 is provided with a cavity suitable for placing the valve core 500 and an opening 615 is opened at one end of the cavity of the verification shell 600, and the open end of the protective shell 100 is detachably connected to the open end of the verification shell 600; a verification port 622 is provided inside the cavity of the verification shell 600, and the verification port 622 is provided inside the cavity of the verification shell 600. The verification port 622 matches the verification end 510 of the valve core 500 so that the verification end 510 of the valve core 500 can be embedded in the verification port 622; the verification shell 600 is provided with an inlet 621 and an outlet 613, and the inlet 621 and the outlet 613 are opened on opposite sides relative to the verification port 622, which is suitable for when the verification end 510 of the valve core 500 is embedded in the verification port 622, the inlet 621 and the outlet 613 are not connected, when the verification end 510 of the valve core 500 leaves the verification port 622, the inlet 621 and the outlet 613 are connected; the adjusting rod 400 is connected to the valve core 500 through the valve core linkage assembly, which is suitable for driving the valve core 500 to move in a direction toward or away from the verification port 622.
[0046] Here, it should be noted that the protective shell 100 is suitable for providing an installation space for the internal valve core linkage assembly and is connected to the verification shell 600, so that the valve core 500 linkage assembly inside the protective shell 100 drives the valve core 500 inside the verification shell 600 to move. The protective shell 100 and the verification shell 600 are detachably connected, so that the valve core 500 inside the verification shell 600 can be replaced at any time to achieve a large number of valve cores 500 The sealing test. The interior of the cavity of the verification shell 600 simulates the internal structure of the liquid hydrogen regulating valve, and the verification port 622 inside the cavity of the verification shell 600 is the same as the valve core port structure of the liquid hydrogen regulating valve. When the verification end 510 of the valve core 500 is not embedded in the verification port 622 (i.e., the open state of the liquid hydrogen regulating valve is simulated), the verification port 622 is not sealed, and the inlet 621 and the outlet 613 are connected through the verification port 622, so at this time, the gas or liquid introduced from the inlet 621 will overflow from the outlet 613; when the verification end 510 of the valve core 500 is completely embedded in the verification port 622 (i.e., the closed state of the liquid hydrogen regulating valve is simulated), the verification port 622 is completely sealed, and the inlet 621 and the outlet 613 are connected. 3 cannot be connected through the verification port 622, so the gas or liquid introduced from the inlet 621 will not overflow from the outlet 613; therefore, when the verification end 510 of the valve core 500 is fully embedded in the verification port 622 during the verification process, some gas or liquid will overflow from the outlet 613 after the gas or liquid is introduced from the inlet 621, indicating that the valve core 500 has not completely sealed the verification port 622, and also indicating that there is wear or notch on the surface of the valve core 500, and its size does not meet the factory standard specifications. This application can verify the sealing performance of the regulating valve core 500 parts before leaving the factory, reducing R&D costs and shortening the R&D cycle; avoiding the high cost and long cycle of the valve core 500 verification in the whole valve state.
[0047] In one possible implementation, Fig.12 As shown, the main body of the protective shell 100 is a cylindrical structure with a hollow cavity inside. A threaded hole is provided at the top of the protective shell 100, which is suitable for installing the adjustment rod 400; a fixing flange 120 is provided at the bottom of the protective shell 100, which is suitable for installing the verification shell 600.
[0048] In a possible implementation, the adjusting rod 400 is threadedly connected to the protective shell 100. Figure 1As shown, the main body of the adjusting rod 400 is a cylindrical structure, and the outer wall is provided with a threaded structure. The threaded hole at the top of the protective shell 100 matches the adjusting rod 400. The adjusting rod 400 is screwed into the threaded hole of the protective shell 100 to achieve the connection between the adjusting rod 400 and the protective shell 100. When the adjusting rod 400 is rotated, the adjusting rod 400 can move up and down relative to the protective shell 100, thereby driving the valve core linkage assembly to move. The top of the adjusting rod 400 is protruding with a rotating portion 410, so that the user can rotate the adjusting rod 400 through the rotating portion 410.
[0049] In a possible implementation, the valve core linkage assembly includes: an upper spring seat 200, a spring 700 and a lower spring seat 300; the upper spring seat 200, the spring 700 and the lower spring seat 300 are arranged inside the cavity of the protective shell 100 from top to bottom, and the upper spring seat 200 is elastically connected to the lower spring seat 300 through the spring 700. Figure 1 As shown, the regulating rod 400 penetrates the protective shell 100 and is fixedly connected to the upper spring seat 200, and the lower spring seat 300 is fixedly connected to the valve core 500; it should be noted that when the spring 700 is squeezed by the upper spring seat 200, the lower spring seat 300 can be pressed downward, and the liquid pressure or gas pressure at the inlet 621 is less than the elastic force of the spring 700, so that the valve core 500 maintains the state of sealing the verification port 622; when the spring 700 is relaxed by the upper spring seat 200, the force pressing the lower spring seat 300 downward is reduced, and when the liquid pressure or gas pressure at the inlet 621 is greater than the downward elastic force of the spring 700, the liquid or gas at the inlet 621 pushes the valve core 500 open, so that the valve core 500 opens the verification port 622. It should be noted that when verifying the sealing of the valve core 500, it is necessary to ensure that the liquid pressure or gas pressure at the inlet 621 is less than the downward elastic force of the spring 700 to prevent the valve core 500 from being pushed up by the impact of liquid or gas, resulting in experimental failure.
[0050] In one possible implementation, Figure 4 and Figure 5 As shown, a spring connection portion 210 is protruding from the outer side of the upper spring seat 200, and a spring connection portion 310 is also protruding from the outer side of the lower spring seat 300; both ends of the spring 700 are respectively in contact with the spring connection portion 210 of the upper spring seat 200 and the spring connection portion 310 of the lower spring seat 300. Figure 4 and Figure 5As shown, the spring connecting portion 210 is sleeved on the upper spring seat 200, the spring connecting portion 310 is sleeved on the outer side of the lower spring seat 300, and the spring 700 is sleeved on the upper spring seat 200 and the lower spring seat 300. When the upper spring seat 200 moves upward, the spring 700 is relaxed, and the pressure between the upper spring seat 200 and the lower spring seat 300 is reduced; when the upper spring seat 200 moves downward, the spring 700 is compressed, and the pressure between the upper spring seat 200 and the lower spring seat 300 is increased.
[0051] In a possible implementation, one end of the upper spring seat 200 is inserted into the cavity of the lower spring seat 300, such as Figure 4 and Figure 5 As shown, a probe rod 220 is provided on the side of the upper spring seat 200 facing the lower spring seat 300, and a probe tube is provided on the side of the lower spring seat 300 facing the upper spring seat 200. The probe rod 220 is inserted into the cavity of the probe tube. It should be noted that in order to prevent the spring 700 from bending during compression or relaxation, inserting the probe rod 220 of the upper spring seat 200 into the probe tube of the lower spring seat 300 can play a limiting role, ensuring the relative stability of the position between the upper spring seat 200 and the lower spring seat 300, and ensuring that the upper spring seat 200 remains in the same straight line during the downward or upward movement.
[0052] In one possible implementation, a limit block 230 is protruding from the outer wall of the probe rod 220, and a limit hole 330 is opened on the side wall of the probe tube. The length direction of the limit hole 330 is parallel to the length direction of the probe tube. The limit block 230 is embedded in the limit hole 330 so that the limit block 230 can only move within the length of the limit hole 330.
[0053] In a possible implementation, the outer wall of the probe tube is further provided with a connection hole 340, which is in an "L" shape and communicates with the limiting hole 330. It should be noted that the connection hole 340 is provided to facilitate the disassembly between the upper spring seat 200 and the lower spring seat 300.
[0054] Preferably, the sum of the lengths of the limiting hole 330 and the connecting hole 340 accounts for 1 / 2 of the overall length of the lower spring seat 300 .
[0055] In one possible implementation, Figure 1 and Fig.11 As shown, the upper spring seat 200 is provided with a connecting groove, and one end of the adjusting rod 400 connected to the upper spring seat 200 is provided with a connecting protrusion 420, and the connecting protrusion 420 is embedded in the connecting groove. The top of the upper spring seat 200 is provided with a connecting groove, and the connecting protrusion 420 at the bottom of the adjusting rod 400 is a circular structure, and the connecting protrusion 420 matches the connecting groove, and the connecting protrusion 420 is embedded in the connecting groove to achieve a fixed connection between the upper spring seat 200 and the adjusting rod 400.
[0056] In a possible implementation, the lower spring seat 300 is fixedly connected to the valve core 500 via a connecting member 900. Figure 5 , Figure 7 , Figure 8 and Fig. 9 As shown, the connecting member 900 is provided with a first locking hole 910 and a second locking hole 920; the first locking hole 910 and the second locking hole 920 both penetrate the connecting member 900; one end of the connecting member 900 provided with the first locking hole 910 is inserted into the bottom through hole of the lower spring seat 300, and the first latch 930 is inserted into the third locking hole 320 of the lower spring seat 300 and the first locking hole 910 of the connecting member 900, thereby achieving the fixed locking of the lower spring seat 300 and the connecting member 900 by the first latch 930. The top of the valve core 500 is provided with a fourth locking hole 520, and one end of the valve core 500 provided with the fourth locking hole 520 is inserted into the bottom through hole of the connector 900, and the second latch 940 is inserted into the second locking hole 920 of the connector 900 and the fourth locking hole 520 of the valve core 500, so that the second latch 940 can fix and lock the connector 900 and the valve core 500. It should be noted that when another valve core 500 is replaced after verification, the second latch 940 is pulled out to separate the valve core 500 from the connector 900, and the second latch 940 is used to reconnect the two after replacing another valve core 500.
[0057] Further, such as Fig. 9 As shown, the first latch 930 and the second latch 940 are both circular tubular structures, and the outer side walls are provided with openings.
[0058] In one possible implementation, Figure 3 As shown, the open end of the protective shell 100 is protruded with a first fixing flange 120, and the open end of the verification shell 600 is also protruded with a second fixing flange 612; the first fixing flange 120 of the protective shell 100 is connected to the second fixing flange 612 of the verification shell 600 through a fixing assembly. The first fixing flange 120 and the protective shell 100 are integrally formed, and the second fixing flange 612 and the verification shell 600 are integrally formed.
[0059] Furthermore, the fixing assembly includes: more than two bolts 130 and nuts; Figure 3 As shown, the first fixing flange 120 and the second fixing flange 612 are each provided with more than two bolt holes, the bolts 130 are inserted into the bolt holes, and the nuts are tightened on the bolts 130 to achieve the connection between the first fixing flange 120 and the second fixing flange 612 .
[0060] In one possible implementation, Figure 6 and Fig.12As shown, a sealing groove 614 is provided on the side of the second fixing flange 612 facing the first fixing flange 120 , and a sealing pressure ring 140 is protruded on the side of the first fixing flange 120 facing the second fixing flange 612 . The sealing pressure ring 140 matches the sealing groove 614 and can be embedded in the sealing groove 614 .
[0061] In a possible implementation, a sealing ring is further included, and the sealing ring is disposed in the sealing groove 614. It should be noted that in order to improve the connection sealing between the verification shell 600 and the protective shell 100, a sealing ring is disposed between the verification shell 600 and the protective shell 100, and the sealing pressure ring can press the sealing ring in the sealing groove 614.
[0062] In a possible implementation, the inlet 621 is disposed opposite to the opening 615 of the verification shell 600 , and the outlet 613 is disposed on a side wall of the verification shell 600 .
[0063] Further, such as Figure 1 As shown, the verification shell 600 includes: an upper shell 610 and a lower shell 620 that are detachably connected; the main body of the upper shell 610 is a tubular structure with openings at both ends, the protective shell 100 and the lower shell 620 are respectively located at opposite ends of the upper shell 610, the second fixing flange 612 is arranged on the top surface of the upper shell 610, and the outlet 613 is opened on the side wall of the upper shell 610; Fig.10 As shown, the lower shell 620 is provided with a cavity with two ends opened, one end of the lower shell 620 penetrates into the inner side of the opening of the upper shell 610 and is fixedly connected to the upper shell 610, and the other end of the lower shell 620 is provided with an inlet 621; the verification port 622 is provided inside the cavity of the lower shell 620. Figure 1 , Figure 6 As shown, the valve core 500 is located inside the cavity of the upper shell 610, the top end of the valve core 500 passes through the opening 615 of the upper shell 610 and is connected to the connecting piece 900, the verification end 510 of the valve core 500 can be inserted into the verification port 622 of the lower shell 620, the liquid or gas can enter from the inlet 621 of the lower shell 620, and the liquid or gas can flow out from the outlet 613 of the upper shell 610.
[0064] Preferably, Figure 1 As shown, the lower housing 620 is connected to the upper housing 610 by threaded connection. Fig.10 As shown, a sealing groove 623 is provided on one end face of the lower shell 620 facing the upper shell 610, and a sealing pressure ring is protruded on one end face of the upper shell 610 facing the lower shell 620. The sealing pressure ring matches the sealing groove 623 and can be embedded in the sealing groove 623; a second sealing ring is provided in the sealing groove 623.
[0065] In one possible implementation, Figure 2As shown, a pipe joint 611 is provided at the outlet 613 of the upper shell 610; the pipe joint 611 can be connected to a pipeline, and liquid or gas can flow into the pipeline through the pipe joint 611. A flow meter is provided in the pipeline to measure the flow of the liquid or gas.
[0066] In a possible implementation, the protective shell 100 further includes: an upper cover 800; the upper cover 800 is buckled on the top of the protective shell 100. Figure 3 As shown, the protective shell 100 is provided with a third fixing flange 110, and the third fixing flange 110 and the first fixing flange 120 are arranged at opposite ends of the protective shell 100. The upper cover 800 is provided with a fourth fixing flange 810, and the third fixing flange 110 and the fourth fixing flange 810 are connected by bolts 820, so as to fix the upper cover 800 on the top of the protective shell 100. Similarly, a sealing groove is provided on the side of the third fixing flange 110 facing the fourth fixing flange 810, and a sealing pressure ring is protruded on the side of the fourth fixing flange 810 facing the third fixing flange 110, and the sealing pressure ring matches the sealing groove and can be embedded in the sealing groove; a third sealing ring is provided in the sealing groove.
[0067] Preferably, during the verification process, the liquid introduced into the inlet 621 is water at room temperature, and the gas introduced is nitrogen or helium.
[0068] Figure 7 This is a typical valve core product adapted for verification in the present application. The main body of the verification end 510 of the valve core 500 is a needle-shaped structure, and the bottom end is a curved surface. The standard length of the verification end 510 of the valve core 500 is 15 mm, and the standard maximum diameter is 6 mm; the diameter of the verification port 622 of the present application is adapted to the standard diameter of the verification end 510 and is approximately 6 mm; it should be noted that the specific size of the verification port 622 of the present application needs to be determined based on the standard size of the verification end 510 of the valve core 500.
[0069] It should be noted that this application can also be used for Figure 7 When the present application is used to verify the adjustment accuracy of the valve core 500, the adjustment rod 400 is rotated to lift the upper spring seat 200, and the limit block 230 of the upper spring seat 200 is brought into contact with the upper edge of the limit hole 330 of the lower spring seat 300. The adjustment rod 400 is then rotated to drive the valve core 500 upward through the lower spring seat 300, so that a certain opening is formed between the valve core 500 and the verification port 622, forming a Figure 2 and Fig.17 The state shown in FIG. 1 is as follows (here, the valve core opening is determined according to the height of the adjusting rod 400 extending out of the protective shell 100). Figure 7When testing the adjustment accuracy of the valve core 500, the opening is set to 0-10mm, that is, the height of the adjustment rod 400 extending out of the protective shell 100 is in the range of 0-10mm; when the opening is formed, gas or liquid is introduced into the inlet 621, and the mass flowmeter in the pipeline measures the flow of liquid or gas flowing out of the outlet 613; since the flow rate is different for different openings, the measured flow parameter should also increase with the increase of the opening, so the relationship curve between the flow rate and the opening (within the range of 0-10mm) can be obtained. According to the relevant standards of the regulating valve and the measured relationship curve, it can be judged whether the profile of the valve core 500 meets the flow characteristic requirements. If it does not meet the standards, the profile of the valve core 500 needs to be repaired or reprocessed, so that problems can be discovered early and the waste of time and cost caused by multiple disassembly and assembly after the whole valve is installed can be avoided.
[0070] Here, it is necessary to explain in detail: Figure 1 The figure is a cross-sectional view of the overall structure when testing the sealing performance of the valve core 500; Figure 1 There is no flow area between the verification end 510 of the middle valve core 500 and the verification port 622. The side plane of the verification end 510 of the valve core 500 should be completely fitted with the verification port 622. Therefore, when testing the sealing performance of the valve core 500, what is verified is whether the side plane of the verification end 510 of the valve core meets the standard.
[0071] Figure 2 This is a cross-sectional view of the overall structure when testing the adjustment accuracy of the valve core 500. Figure 2 There is a flow area between the verification end 510 of the middle valve core 500 and the verification port 622, but the area is small and not obvious in the figure. The curved surface at one end of the verification end 510 of the valve core 500 has an adjusting function but no sealing function. Therefore, when testing the adjustment accuracy of the valve core 500, what is verified is whether the curved surface of the verification end 510 of the valve core meets the standard.
[0072] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.
Claims
1. A verification tool for verifying the valve core of a liquid hydrogen regulating valve, characterized in that: include: Protective shell, adjusting rod, valve core linkage assembly and verification shell; The protective shell is provided with a cavity with an opening at one end, the adjusting rod penetrates the protective shell and is connected with the valve core linkage assembly, and the valve core linkage assembly is movably arranged inside the cavity of the protective shell through the adjusting rod; The verification shell is provided with a cavity suitable for placing the valve core, and one end of the cavity of the verification shell is provided with an opening, and the open end of the protection shell is detachably connected to the open end of the verification shell; A verification port is provided inside the cavity of the verification shell, and the verification port matches the verification end of the valve core so that the verification end of the valve core can be embedded in the verification port; The verification shell is provided with an inlet and an outlet, and the inlet and the outlet are opened at different sides relative to the verification port, so that when the verification end of the valve core is embedded in the verification port, the inlet and the outlet are not connected, and when the verification end of the valve core leaves the verification port, the inlet and the outlet are connected; The regulating rod is connected to the valve core through the valve core linkage assembly, and is suitable for driving the valve core to move in a direction toward or away from the verification port.
2. The verification tool for verifying the valve core of the liquid hydrogen regulating valve according to claim 1 is characterized in that: The valve core linkage assembly includes: an upper spring seat, a spring and a lower spring seat; The upper spring seat is elastically connected to the lower spring seat through the spring.
3. The verification tool for verifying the valve core of the liquid hydrogen regulating valve according to claim 2 is characterized in that: A spring connecting portion is protrudingly provided on the outer side of the upper spring seat, and a spring connecting portion is also protrudingly provided on the outer side of the lower spring seat; Two ends of the spring are respectively abutted against a spring connecting portion of the upper spring seat and a spring connecting portion of the lower spring seat.
4. The verification tool for verifying the valve core of the liquid hydrogen regulating valve according to claim 3 is characterized in that: The adjusting rod passes through the protective shell and is fixedly connected to the upper spring seat, and the adjusting rod is threadedly connected to the protective shell.
5. The verification tool for verifying the valve core of the liquid hydrogen regulating valve according to claim 3 is characterized in that: The upper spring seat is provided with a connecting groove, and one end of the adjusting rod connected to the upper spring seat is provided with a connecting protrusion, and the connecting protrusion is embedded in the connecting groove.
6. The verification tool for verifying the valve core of the liquid hydrogen regulating valve according to claim 1, characterized in that: A first fixing flange is protruded from the open end of the protection shell, and a second fixing flange is protruded from the open end of the verification shell; the first fixing flange is connected to the second fixing flange through a fixing assembly.
7. The verification tool for verifying the valve core of the liquid hydrogen regulating valve according to claim 1, characterized in that: The inlet is arranged opposite to the opening end of the verification shell, and the outlet is arranged on the side wall of the verification shell.
8. The verification tool for verifying the valve core of the liquid hydrogen regulating valve according to claim 1, characterized in that: A pipeline joint is provided at the outlet of the verification shell.