Operating valve

Abstract

The operating valve comprises a valve body, a valve cover, a piston, an indicating shaft and a sensing assembly, and a valve element for opening and closing the valve body is arranged in the valve body; the valve cover is connected to one side of the valve body; the piston is movably arranged in the valve deck and connected with the valve element so as to be used for controlling the valve element to open and close the valve body. The indicating shaft penetrates through the valve cover, the axial assembling position of the indicating shaft is adjustably connected to the piston, and when the piston moves to switch the opening and closing states of the valve body, the indicating shaft can move along with the movement of the piston; the sensing assembly is installed on the valve deck and used for detecting the position of the indicating shaft and recognizing the opening and closing state of the valve body according to the position of the indicating shaft. When the operating valve is assembled, the relative positions of the indicating shaft and the piston in the axial direction can be adjusted according to the detection position of the sensing assembly, the situation that the indicating shaft cannot be installed at the position detected by the sensing assembly due to machining errors is avoided, the operating valve can be matched with sensing assemblies of different specifications and models, and the applicability is wider.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to an operating valve. Background Art

[0002] In an operating valve, the working state of the valve body can be changed by the movement of the valve core. To intuitively determine the working state of the valve body, an indicator that moves with the valve shaft is often provided on the valve body. The indicator structure allows the operator to visually observe the status of the valve body.

[0003] However, with the development of industry, the piping system has become more complex, the number of valve bodies used in the flow channel has increased, and in some areas it is not convenient for personnel to observe the relevant piping systems at any time. At this time, it is difficult to actually work by visually observing the status of the valve body. Therefore, a sensor can be installed on the valve body to detect the position of the indicator.

[0004] However, the stroke of the operating valve itself is relatively small. For example, a valve body with a flow rate of 25lpm@1bar (a flow rate of 25 liters per minute at a pressure of 1 bar) generally has an opening and closing stroke (i.e., piston stroke) within 3mm. Therefore, the adjustment accuracy of the indicator shaft also needs to be within 3mm, and the precision adjustment of the indicator shaft requires high requirements. In addition, due to different usage scenarios, piston strokes and other factors, different valve bodies will use sensors of different specifications and models. Since sensors of different specifications and models have different detection positions, it is necessary to design indicators of corresponding sizes to match the corresponding sensors, resulting in higher design costs. At the same time, due to the existence of processing errors, there may still be a problem that the indicator cannot be well adapted to the sensor. Utility Model Content

[0005] Based on this, it is necessary to provide an operating valve to solve at least one of the above problems.

[0006] The present application provides an operating valve, comprising: a valve body, a valve cover, a piston, an indicator shaft and a sensor assembly, wherein a valve core for opening and closing the valve body is provided in the valve body; the valve cover is connected to one side of the valve body; the piston is movably provided in the valve cover, and the piston is connected to the valve core to control the valve core to open and close the valve body; the indicator shaft passes through the valve cover, and the axial assembly position of the indicator shaft is adjustably connected to the piston, and when the piston moves to switch the opening and closing state of the valve body, the indicator shaft can move with the movement of the piston; the sensor assembly is installed on the valve cover to detect the position of the indicator shaft and identify the opening and closing state of the valve body according to the position of the indicator shaft.

[0007] With such an arrangement, compared to the prior art, the operating valve provided by this solution is adjustably connected to the piston by setting the axial assembly position of the indicator shaft, so that during assembly, the relative axial position of the indicator shaft and the piston can be adjusted according to the detection position of the sensor assembly, so that the indicator shaft can be adjusted to the position detected by the sensor assembly. This 1) avoids the situation where the indicator shaft cannot be installed to the position detected by the sensor assembly due to processing errors. In addition, if the operating valve uses different types of sensor assemblies, the detection position of the sensor assembly will also be different. This application adjusts the axial relative position of the indicator shaft and the piston, 2) so that the indicator shaft can be adjusted to the position detected by the sensor assembly, thereby being adaptable to sensor assemblies of different specifications and models, and having a wider applicability.

[0008] In one embodiment, the piston is provided with an axially extending assembly hole, and one end of the indicator shaft extends into the assembly hole and is threadedly connected to the assembly hole. In this way, the threaded connection enables the axial assembly position between the indicator shaft and the piston to be adjustable.

[0009] In one embodiment, the sensor assembly includes a connecting block and a sensor, wherein the connecting block is mounted on the valve cover, and the sensor is mounted on the connecting block. This ensures sufficient thread locking force of the bolts, thereby preventing the sensor from loosening during use, thereby ensuring the accuracy of sensor detection.

[0010] In one embodiment, the connecting block is provided with a limiting hole, and the indicating shaft is passed through the limiting hole so that the end of the indicating shaft can move to a position detected by the sensor. A limiting portion is provided at the end of the indicating shaft away from the piston. The limiting portion is always passed through the limiting hole when the piston moves and switches the opening and closing states of the valve body. The limiting hole is a non-circular hole, and the shape of the limiting portion is adapted to the limiting hole to limit the rotation of the indicating shaft.

[0011] In this way, the limiting hole and the limiting part can cooperate to ensure that the indicating shaft will not rotate relative to the connecting block, so that when the piston moves axially, the indicating shaft and the piston will not rotate relative to each other, so that the axial position of the indicating shaft and the piston remains unchanged, ensuring the consistency of the indicating shaft movement stroke and the piston movement stroke, and thus ensuring the accuracy of the sensor detection.

[0012] In one embodiment, the valve cover is provided with an axially extending assembly portion, the axially extending assembly channel is provided in the assembly portion, a connecting portion is provided on one side of the connecting block, the connecting portion is threadedly connected to the assembly channel, the connecting portion is provided with an axially extending through hole, the through hole is connected to the limiting hole, the indicating shaft is passed through the through hole, and a gap is provided between the outer wall of the indicating shaft and the inner wall of the through hole.

[0013] In this way, the connecting block can be mounted on the valve cover through the threaded fit of the connecting portion and the assembly passage. The connection structure between the connecting block and the valve cover is very simple and convenient. The provision of the through-hole provides clearance for the indicator shaft, ensuring that the position limiter of the indicator shaft can be inserted into the position limiter. Furthermore, a gap exists between the outer wall of the indicator shaft and the inner wall of the through-hole, ensuring that the through-hole does not affect the axial movement of the indicator shaft, thereby ensuring that the axial movement of the indicator shaft and the piston are consistent.

[0014] In one embodiment, the connecting block is provided with a matching hole, the valve cover end surface is provided with a countersunk hole, and the sensing assembly further includes a limiting shaft, which passes through the matching hole and the countersunk hole to limit the connection block from rotating relative to the valve cover.

[0015] In this way, the detection position of the sensor is prevented from changing, thereby ensuring the accuracy of the sensor detection.

[0016] In one embodiment, a connecting hole is further provided on the connecting block, and the connecting hole is used to connect the sensor and the connecting block. The connecting hole and the matching hole are symmetrically arranged with the central axis of the connecting part as the central axis. The connecting hole and the matching hole are both threaded holes and both pass through the connecting block.

[0017] In one embodiment, the valve cover is provided with an axially extending assembly portion, and the assembly portion is provided with an axially extending assembly channel that extends through the assembly portion. The piston includes a piston body, a first extension portion, and a second extension portion. The piston body slides in conjunction with the inner wall of the valve cover. The first extension portion and the second extension portion are respectively provided on both sides of the piston body and extend in opposite directions along the axial direction of the piston body. The first extension portion extends into the assembly channel and slides in conjunction with the assembly channel. The assembly hole is provided at least in the first extension portion, and the second extension portion is connected to the valve core.

[0018] In this way, the first extension extends into the assembly channel, which guides the movement of the first extension. At the same time, the sliding fit between the piston body and the inner wall of the valve cover ensures the stability of the piston's axial movement. Furthermore, since the assembly hole is provided in at least the first extension, the connection between the indicator shaft and the piston is facilitated, making the operating valve structure very compact.

[0019] In one embodiment, a guide portion is fixedly connected to the valve cover, the guide portion is provided with a guide hole, the second extension portion is passed through the guide hole and slidably cooperates with the guide hole, a first sealing ring is provided between the outer wall of the first extension portion and the inner wall of the assembly channel, a second sealing ring is provided between the outer wall of the piston body and the inner wall of the valve cover, and a third sealing ring is provided between the second extension portion and the inner wall of the guide hole.

[0020] In this way, the guide portion guides the second extension portion, which is beneficial to further improve the stability of the axial movement of the piston.

[0021] In one embodiment, the indicating shaft includes an external threaded section and a polished rod section, the assembly hole includes an internal threaded section, and the external threaded section and the internal threaded section are threadedly connected; the length of the internal threaded section is greater than the length of the external threaded section, and / or the outer diameter of the external threaded section is greater than the outer diameter of the polished rod section.

[0022] This ensures that when the axial assembly position of the indicator shaft and piston is adjusted within a certain range, the external thread section always remains within the internal thread section, thereby ensuring sufficient contact area between the two and preventing loosening between the indicator shaft and piston during installation, which could cause a change in the axial relative position of the indicator shaft and piston. Furthermore, the outer diameter of the external thread section is larger than that of the polished rod section, thus preventing interference between the polished rod section and the internal thread when adjusting the axial assembly position between the indicator shaft and piston during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A three-dimensional diagram of an operating valve according to an embodiment of the present application;

[0025] Figure 2 for Figure 1 a top view of the operating valve shown;

[0026] Figure 3 for Figure 2 Sectional view along line AA;

[0027] Figure 4 for Figure 2 Cross-sectional view along line BB;

[0028] Figure 5 A three-dimensional diagram of an indicator shaft according to an embodiment of the present application;

[0029] Figure 6 A perspective view of a sensor according to an embodiment of the present application;

[0030] Figure 7 A partially cutaway perspective view of a sensor according to an embodiment of the present application;

[0031] Figure 8 This is a schematic diagram of the assembly of the connecting block and the indicating shaft according to an embodiment of the present application;

[0032] Figure 9 for Figure 8 a half-cutaway perspective view of the structure shown;

[0033] Figure 10 This is a three-dimensional diagram of a piston according to an embodiment of the present application.

[0034] 1. Assembly part; 2. Assembly channel; 3. Counterbore; 4. Piston; 5. Assembly hole; 6. Internal thread section; 7. Piston body; 8. First extension part; 9. End part; 10. Neck section; 11. Reinforcement rib; 12. Second extension part; 13. Indicator shaft; 14. External thread section; 15. Polished rod section; 16. Limiting part; 17. Sensor assembly; 18. Connecting block; 19. Limiting hole; 20. Connecting part; 21. Through hole; 22. Fitting hole; 23. Connecting hole; 24. Sensor; 25. Detection groove; 26. Limiting shaft; 27. Valve core; 28. Guide part; 29. ​​Guide hole; 30. First sealing ring; 31. Second sealing ring; 32. Third sealing ring. DETAILED DESCRIPTION

[0035] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0036] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0038] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0040] See Figures 1 to 4The present application provides an operating valve, comprising: a valve body 10, a valve cover 20, a piston 30, an indicator shaft 40, and a sensor assembly 50. A valve core 60 is disposed within the valve body 10 for opening and closing the valve body 10. The valve cover 20 is connected to one side of the valve body 10. The piston 30 is movably disposed within the valve cover 20 and is connected to the valve core 60 to control the opening and closing of the valve body 10. An indicator shaft 40 is disposed through the valve cover 20 and is axially adjustable in position to the piston 30. When the piston 30 moves to switch the valve body 10 between the open and closed states, the indicator shaft 40 moves with the movement of the piston 30. It should be understood that "the indicator shaft 40 is axially adjustable in position to the piston 30" means that the indicator shaft 40 is connected to the piston 30, and the assembly position between the indicator shaft 40 and the piston 30 is adjustable, with the assembly position adjustment direction being the axial direction of the indicator shaft 40. In other words, during assembly, the indicator shaft 40 can be adjusted in its relative position to the piston 30 along its own axial direction. The sensor assembly 50 is mounted on the valve cover 20 and is used to detect the position of the indicator shaft 40 and identify the open or closed state of the valve body 10 based on the position of the indicator shaft 40. Thus, the operating valve provided by the present application is adjustably connected to the piston 30 by setting the axial assembly position of the indicator shaft 40. This allows the relative axial position of the indicator shaft 40 and the piston 30 to be adjusted according to the detection position of the sensor assembly 50 during assembly, thereby allowing the indicator shaft 40 to be adjusted to the position detected by the sensor assembly 50. This prevents the indicator shaft 40 from being unable to be installed in the position detected by the sensor assembly 50 due to manufacturing errors. Furthermore, if the operating valve uses different models of sensor assemblies 50, the detection position of the sensor assembly 50 will also be different. By adjusting the axial relative position of the indicator shaft 40 and the piston 30, the present application 2) allows the indicator shaft 40 to be adjusted to the position detected by the sensor assembly 50, thereby adapting to different specifications and models of sensor assemblies 50, thereby providing wider applicability.

[0041] The principle of the sensor component 50 detecting the opening and closing state of the valve body 10 is as follows: when the valve body 10 is in the open state, the end of the indicator shaft 40 is in the detection position of the sensor component 50; when the valve body 10 is in the closed state, the end of the indicator shaft 40 leaves the detection position of the sensor component 50, so that the sensor component 50 determines the opening and closing state of the valve body 10 by detecting whether the indicator shaft 40 is in the detection position.

[0042] In this embodiment, the valve core 60 is a diaphragm, that is, the operating valve is a diaphragm valve. During operation, the piston 30 moves axially, driving the diaphragm to move and / or deform, thereby opening or closing the valve port, thereby achieving on-off control of the valve body 10. However, the present invention is not limited to this, and the valve core 60 may not be a diaphragm, as long as the movement of the piston 30 can control the movement of the valve core 60 and achieve on-off control of the valve body 10.

[0043] Further, see Figure 3The piston 30 is provided with an axially extending assembly hole 31, into which one end of the indicator shaft 40 extends and is threadedly connected. This threaded connection allows for adjustable axial positional alignment between the indicator shaft 40 and the piston 30. This simple structure provides convenient connection and easy adjustment. Furthermore, the threaded connection allows for highly precise adjustment of the axial positional alignment between the indicator shaft 40 and the piston 30, thus satisfying the high-precision adjustment requirements of the indicator shaft 40.

[0044] See Figure 3 and Figure 5 Furthermore, the indicating shaft 40 includes an external threaded section 41 and a polished rod section 42, the assembly hole 31 includes an internal threaded section 311, and the external threaded section 41 and the internal threaded section 311 are threadedly connected.

[0045] In this embodiment, the length of the internal thread section 311 is greater than the length of the external thread section 41. This ensures that when the axial assembly position of the indicator shaft 40 and the piston 30 is adjusted within a certain range, the external thread section 41 is always within the internal thread section 311, thereby ensuring sufficient contact area between the two and preventing loosening of the indicator shaft 40 and the piston 30 during installation, which could cause a change in the axial relative position of the indicator shaft 40 and the piston 30.

[0046] Furthermore, the outer diameter of the external thread section 41 is larger than the outer diameter of the polished rod section 42 , thereby avoiding interference between the polished rod section 42 and the internal thread when adjusting the axial assembly position between the indicator shaft 40 and the piston 30 during installation.

[0047] See Figure 1 、 Figure 3 and Figure 4 The sensor assembly 50 includes a connecting block 51 and a sensor 52. The connecting block 51 is mounted on the valve cover 20, and the sensor 52 is mounted on the connecting block 51. If the sensor is directly mounted on the valve cover by bolts, due to the limited thickness of the valve cover and the limited thread locking force of the bolts, long-term use may cause the bolts to loosen, thereby causing the height position of the sensor to change, which in turn causes inaccurate sensor detection. In this embodiment, by providing a connecting block 51 and mounting the sensor 52 on the connecting block 51, when the sensor 52 is mounted using bolts, by selecting a connecting block 51 of sufficient thickness, sufficient thread locking force of the bolts can be ensured, thereby preventing the sensor 52 from loosening during use, thereby ensuring the accuracy of the sensor 52 detection.

[0048] See Figure 1 、 Figure 6 and Figure 7The sensor 52 is provided with a detection slot 521. A transmitter 522 and a receiver 523 are provided on opposite sides of the detection slot 521. The transmitter 522 is provided with a transmitter, and the receiver 523 is provided with a receiver. The transmitter generates a signal that is received by the receiver. When the piston 30 moves upward to open the valve body 10, one end of the indicator shaft 40 extends into the detection slot 521, blocking the signal, and the receiver cannot receive the signal transmitted by the transmitter. When the piston 30 moves downward to close the valve body 10, the indicator shaft 40 leaves the detection slot 521, and the receiver can receive the signal transmitted by the transmitter. In this way, the open or closed state of the valve body 10 can be determined by whether the receiver can receive the signal transmitted by the transmitter. The sensor 52 can be an infrared sensor.

[0049] See Figure 3 、 Figure 5 、 Figure 8 and Figure 9 Furthermore, the connecting block 51 is provided with a limiting hole 511, and the indicator shaft 40 is inserted into the limiting hole 511 so that the end of the indicator shaft 40 can move to a position detected by the sensor 52 (i.e., the above-mentioned detection groove 521). A limiting portion 43 is provided at the end of the indicator shaft 40 away from the piston 30. The limiting portion 43 is always inserted into the limiting hole 511 when the piston 30 moves to switch the open and closed states of the valve body 10. The limiting hole 511 is a non-circular hole, and the shape of the limiting portion 43 is adapted to the limiting hole 511 to limit the rotation of the indicator shaft 40. Since the indicator shaft 40 is threadedly connected to the assembly hole 31 of the piston 30, when the piston 30 moves axially, if the indicator shaft 40 rotates relative to the piston 30, the axial position of the indicator shaft 40 and the piston 30 will change, thereby causing inaccurate detection by the sensor 52. In this embodiment, the limiting hole 511 cooperates with the limiting portion 43 to ensure that the indicator shaft 40 does not rotate relative to the connecting block 51, so that when the piston 30 moves axially, the indicator shaft 40 and the piston 30 do not rotate relative to each other, so that the axial positions of the indicator shaft 40 and the piston 30 remain unchanged, ensuring the consistency of the moving stroke of the indicator shaft 40 and the moving stroke of the piston 30, and further ensuring the accuracy of the detection of the sensor 52.

[0050] In this embodiment, see Figure 5 The limiting portion 43 is provided at one end of the polished rod segment 42 away from the external thread segment 41 , but is not limited thereto. The entire polished rod segment 42 may also be provided as the limiting portion 43 , and this application does not impose any limitation on this.

[0051] In this embodiment, see Figure 8 The limiting hole 511 is in the shape of an elongated strip, but is not limited thereto. The limiting hole 511 may also be in other shapes such as a square, an ellipse, a D-shape, a triangle, a pentagon, a hexagon, etc., as long as the limiting hole 511 is non-circular and can limit the rotation of the indicating shaft 40.

[0052] Further, see Figure 3 The valve cover 20 is provided with an axially extending assembly portion 21, and the assembly portion 21 is provided with an axially extending assembly channel 22. A connecting portion 512 is provided on one side of the connecting block 51, and the connecting portion 512 is threadedly connected to the assembly channel 22. A through hole 513 is provided in the connecting portion 512, which axially extends through the connecting portion 512 and communicates with the limiting hole 511. The indicator shaft 40 is inserted into the through hole 513, and a gap is provided between the outer wall of the indicator shaft 40 and the inner wall of the through hole 513. In this way, the connecting block 51 can be installed on the valve cover 20 through the threaded engagement of the connecting portion 512 and the assembly channel 22. The connection structure between the connecting block 51 and the valve cover 20 is very simple and easy to connect. The provision of the through hole 513 provides a clearance for the indicator shaft 40, ensuring that the limiting portion 43 of the indicator shaft 40 can be inserted into the limiting hole 511. At the same time, there is a gap between the outer wall of the indicator shaft 40 and the inner wall of the through hole 513 to ensure that the through hole 513 does not affect the axial movement of the indicator shaft 40, thereby ensuring the consistency of the axial movement of the indicator shaft 40 and the axial movement of the piston 30.

[0053] See Figure 4 、 Figure 8 and Figure 9 Furthermore, the connecting block 51 is provided with a mating hole 514, and the end surface of the valve cover 20 is provided with a countersunk hole 23. The sensor assembly 50 also includes a limiting shaft 53, which is disposed through the mating hole 514 and the countersunk hole 23 to limit the rotation of the connecting block 51 relative to the valve cover 20. Because the connecting portion 512 of the connecting block 51 and the assembly passage 22 of the valve cover 20 are threaded together, the connecting block 51 and the valve cover 20 may become loose after prolonged use or when the operating valve is subjected to impact or vibration, causing the detection position of the sensor 52 to change, thereby affecting the detection accuracy of the sensor 52. By providing the mating hole 514, the countersunk hole 23, and the limiting shaft 53 in this embodiment, the connection block 51 can be limited to rotate relative to the valve cover 20, thereby preventing the detection position of the sensor 52 from changing, thereby ensuring the detection accuracy of the sensor 52.

[0054] Furthermore, the connecting block 51 is provided with a connecting hole 515, which is used to connect the sensor 52 and the connecting block 51. The connecting hole 515 and the matching hole 514 are symmetrically arranged with the central axis of the connecting portion 512 as the central axis. The connecting hole 515 and the matching hole 514 are both threaded holes and both pass through the connecting block 51. In this way, the connecting hole 515 and the matching hole 514 can be used interchangeably. That is, the matching hole 514 can be used as a hole for the limit shaft 53 to pass through, or as a hole for connecting the sensor 52 and the connecting block 51. Similarly, the connecting hole 515 can be used as a hole for the sensor 52 and the connecting block 51, or as a hole for the limit shaft 53 to pass through. In this embodiment, the limit shaft 53 is configured as a bolt, and the sensor 52 and the connecting block 51 are connected by bolts. When installing the connecting block 51, due to machining errors, the mating hole 514 and the countersunk hole 23 may not be fully aligned when the connecting portion 512 is threadedly tightened onto the assembly channel 22. In this case, the connecting block 51 can be rotated in the opposite direction to align the connecting hole 515 with the countersunk hole 23. Then, the limiting shaft 53 is inserted through the connecting hole 515 and the countersunk hole 23 to limit the rotation of the connecting block 51. In this way, the connecting block 51 does not need to be rotated nearly 360 degrees in the opposite direction, but only needs to be rotated in the opposite direction by an angle of less than 180 degrees to be rotationally limited by the limiting shaft 53. When the connecting hole 515 and the countersunk hole 23 are aligned, the mating hole 514 can serve as the hole for connecting the sensor 52 to the connecting block 51.

[0055] In this embodiment, the matching hole 514 and the connecting hole 515 are both set to two, the limiting shaft 53 more reliably restricts the rotation of the connecting block 51, and the connection between the sensor 52 and the connecting block 51 is more reliable, but not limited to this, the matching hole 514 and the connecting hole 515 can also be set to one or more than two, and this application does not impose any restrictions on this.

[0056] Further, see Figure 3 and Figure 10 The piston 30 includes a piston body 32, a first extension 33, and a second extension 34. The piston body 32 slides with the inner wall of the valve cover 20. The first extension 33 and the second extension 34 are respectively provided on either side of the piston body 32 and extend in opposite directions along the axial direction of the piston body 32. The first extension 33 extends into the assembly channel 22 and slides with the assembly channel 22. The assembly hole 31 is provided at least in the first extension 33, and the second extension 34 is connected to the valve core 60. In this way, the first extension 33 extends into the assembly channel 22, and the assembly channel 22 guides the movement of the first extension 33. At the same time, the axial movement stability of the piston 30 is ensured by the sliding fit between the piston body 32 and the inner wall of the valve cover 20. Since the assembly hole 31 is provided at least in the first extension 33, the connection between the indicator shaft 40 and the piston 30 is facilitated, and the operating valve structure is very compact.

[0057] In this embodiment, the assembly channel 22 accommodates the connecting portion 512 of the connecting block 51 at one end and the first extension 33 of the piston 30 at the other end, resulting in a very compact structure. Specifically, the end of the assembly channel 22 near the connecting block 51 is provided with internal threads that mate with the external threads of the connecting portion 512. The end of the assembly channel 22 away from the connecting block 51 is provided with a smooth surface that slidably engages with the first extension 33.

[0058] Furthermore, the first extension portion 33 includes a head portion 331 and a neck portion 332. The head portion 331 is slidably engaged with the assembly channel 22, and the neck portion 332 connects the head portion 331 and the piston body 32. The outer diameter of the neck portion 332 is smaller than that of the head portion 331. A reinforcing rib 333 is provided on the outer wall of the neck portion 332. The provision of the reinforcing rib 333 thus improves the structural strength of the first extension portion 33 and prevents deformation when the indicator shaft 40 and the piston 30 are connected.

[0059] Further, see Figure 3 A guide portion 70 is fixedly connected to the valve cover 20. The guide portion 70 has a guide hole 71. The second extension portion 34 is inserted into the guide hole 71 and slidably engages with the guide hole 71. In this way, the guide portion 70 guides the second extension portion 34, which helps to further improve the stability of the axial movement of the piston 30.

[0060] Furthermore, a first sealing ring 81 is provided between the outer wall of the first extension 33 and the inner wall of the assembly passage 22; a second sealing ring 82 is provided between the outer wall of the piston body 32 and the inner wall of the valve cover 20; and a third sealing ring 83 is provided between the second extension 34 and the inner wall of the guide hole 71. This creates a three-stage seal in the axial direction of the piston 30, greatly improving sealing reliability. Furthermore, the first sealing ring 81, the second sealing ring 82, and the third sealing ring 83 not only provide a seal but also increase the resistance to rotation of the piston 30, thereby preventing the piston 30 from rotating during axial movement. This, in turn, prevents the piston 30 from changing its axial relative position with respect to the indicator shaft 40, thereby ensuring the accuracy of the detection results of the sensor 52.

[0061] Specifically, a first sealing groove is defined on the outer wall of the end portion 331, and a first sealing ring 81 is disposed within the first sealing groove of the end portion 331. A second sealing groove is defined on the outer wall of the piston body 32, and a second sealing ring 82 is disposed within the second sealing groove. A third sealing groove is defined on the inner wall of the guide hole 71, and a third sealing ring 83 is disposed within the third sealing groove.

[0062] Please combine Figure 3The assembly process of the operating valve provided in the present application is as follows: first, the sensor assembly 50 is installed on the valve cover 20, and then the piston 30 and the indicator shaft 40 are inserted into the interior of the valve cover 20, and the piston 30 is moved to the top of the valve cover 20 (that is, the end away from the valve body 10), and the sensor 52 is detected to see whether it can detect the indicator shaft 40. When the sensor 52 cannot detect the indicator shaft 40, the piston 30 is rotated. Due to the limitation of the limiting hole 511, the indicator shaft 40 cannot rotate with the piston 30, so that the indicator shaft 40 moves axially, that is, the axial assembly position between the indicator shaft 40 and the piston 30 changes, until the indicator shaft 40 moves to the position detected by the sensor 52, and the axial assembly position between the indicator shaft 40 and the piston 30 is determined. Then remove the piston 30 and the indicator shaft 40 together, install the first sealing ring 81 and the second sealing ring 82 on the piston 30, and then insert the piston 30 and the indicator shaft 40 into the valve cover 20 together. Then install the guide part 70 (with the third sealing ring 83 installed), the valve core 60 and other structures, and finally install the valve cover 20 on the valve body 10. In this way, the assembly of the operating valve is completed.

[0063] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. An operating valve, comprising: A valve body, wherein a valve core for opening and closing the valve body is provided in the valve body; a valve cover connected to one side of the valve body; A piston is movably disposed in the valve cover and connected to the valve core to control the valve core to open and close the valve body; characterized in that it also includes: an indicator shaft, the indicator shaft being passed through the valve cover, the indicator shaft being adjustably connected to the piston in an axial assembly position, and being capable of moving with the movement of the piston when the piston moves to switch the open and closed states of the valve body; and A sensor component is installed on the valve cover to detect the position of the indicator shaft and identify the opening and closing state of the valve body according to the position of the indicator shaft.

2. The operating valve according to claim 1, characterized in that An axially extending assembly hole is provided in the piston, and one end of the indicating shaft extends into the assembly hole and is threadedly connected to the assembly hole.

3. The operating valve according to claim 1 or 2, characterized in that: The sensing assembly includes a connecting block and a sensor. The connecting block is mounted on the valve cover, and the sensor is mounted on the connecting block.

4. The operating valve according to claim 3, characterized in that The connecting block is provided with a limiting hole, and the indicating shaft is passed through the limiting hole so that the end of the indicating shaft can move to a position detected by the sensor. A limiting portion is provided at one end of the indicating shaft away from the piston. The limiting portion is always passed through the limiting hole when the piston moves to switch the opening and closing states of the valve body. The limiting hole is a non-circular hole, and the shape of the limiting portion is adapted to the limiting hole to limit the rotation of the indicating shaft.

5. The operating valve according to claim 4, characterized in that The valve cover is provided with an axially extending assembly portion, the assembly portion is provided with an axially extending assembly channel and passing through the assembly portion, one side of the connecting block is provided with a connecting portion, the connecting portion is threadedly connected to the assembly channel, A through hole is provided in the connecting portion and passes through the connecting portion in the axial direction. The through hole is communicated with the limiting hole. The indicating shaft is passed through the through hole, and a gap is formed between the outer wall of the indicating shaft and the inner wall of the through hole.

6. The operating valve according to claim 5, characterized in that The connecting block is provided with a matching hole, and the end surface of the valve cover is provided with a countersunk hole. The sensing assembly also includes a limiting shaft, which passes through the matching hole and the countersunk hole to limit the connection block from rotating relative to the valve cover.

7. The operating valve according to claim 6, characterized in that The connecting block is also provided with a connecting hole, which is used to connect the sensor and the connecting block. The connecting hole and the matching hole are symmetrically arranged with the central axis of the connecting part as the central axis. The connecting hole and the matching hole are both threaded holes and both pass through the connecting block.

8. The operating valve according to claim 2, characterized in that The valve cover is provided with an axially extending assembly portion, and the assembly portion is provided with an axially extending assembly channel that passes through the assembly portion. The piston includes a piston body, a first extension portion and a second extension portion. The piston body is slidably engaged with the inner wall of the valve cover. The first extension portion and the second extension portion are respectively arranged on both sides of the piston body and extend in opposite directions along the axial direction of the piston body. The first extension portion extends into the assembly channel and slidably engages with the assembly channel. The assembly hole is at least arranged in the first extension portion, and the second extension portion is connected to the valve core.

9. The operating valve according to claim 8, characterized in that A guide portion is fixedly connected to the valve cover, and the guide portion is provided with a guide hole. The second extension portion is passed through the guide hole and slidably cooperates with the guide hole. A first sealing ring is provided between the outer wall of the first extension portion and the inner wall of the assembly channel, a second sealing ring is provided between the outer wall of the piston body and the inner wall of the valve cover, and a third sealing ring is provided between the second extension portion and the inner wall of the guide hole.

10. The operating valve according to claim 2, characterized in that The indicating shaft includes an external thread section and a polished rod section, the assembly hole includes an internal thread section, and the external thread section and the internal thread section are threadedly connected; The length of the internal thread segment is greater than the length of the external thread segment, and / or the outer diameter of the external thread segment is greater than the outer diameter of the polished rod segment.

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