Valve transponder

Abstract

The utility model discloses a valve transponder which comprises a protective cover, a valve body, a valve body, a valve body, a valve body, a valve body, a valve body, a valve body and a valve body, and the protective cover is provided with a transparent area; the shell is connected with the protective cover in a clamped mode through a buckle, and the buckle is located between the shell and the protective cover; the indicator is at least partially located in the protective cover, a pointer or a pointer mark is installed on the side, facing the protective cover, of the indicator, the transparent area is located on the movement path of the pointer, and when the pointer is located in the transparent area, the angle scales are located in the indication direction of the pointer; the indicator is installed on the main shaft, and the main shaft comprises an input part used for being connected with a valve actuator. According to the valve transponder, the opening and closing angle of the valve is effectively obtained, the convenience of installation between the shield and the shell is improved, meanwhile, the situation that the connecting piece is exposed outside is avoided, and the apparent mass of the valve transponder is improved.

Description

Technical Field

[0001] This application relates to the field of limit switch technology, and in particular to a valve feedback device. Background Technology

[0002] A valve feedback device is a field instrument used in the process control industry for automatic feedback of valve position signals. Existing valve feedback devices generally have visual indication functions, and the components involved include indicators and protective covers.

[0003] The outer casing and protective cover of the indicator are fixed with screws or set screws, which makes component processing and assembly cumbersome, and the exposed screws or set screws affect the appearance quality of the product. In addition, the indication function of existing valve feedback devices mainly identifies the valve's open and closed position through color display, which is usually only applicable to feedback recognition of standard 90° valves and cannot be used to indicate valves with special opening and closing angles. Utility Model Content

[0004] The purpose of this application is to provide a valve feedback device that effectively obtains the opening and closing angle of the valve, increases the ease of installation between the cover and the housing, avoids exposed connecting parts, and improves the appearance quality of the valve feedback device.

[0005] The valve feedback device provided in this application includes: a protective cover, the protective cover having a transparent area, and an angle scale on one side of the transparent area; a housing, the housing being snapped together with the protective cover by a snap fastener, the snap fastener being located between the housing and the protective cover; an indicator, the indicator being at least partially located inside the protective cover, the indicator having a pointer or pointer marking mounted on the side facing the protective cover, the transparent area being located on the movement path of the pointer, and the angle scale being located in the pointing direction of the pointer when the pointer is in the transparent area; and a main shaft, the indicator being mounted on the main shaft, the main shaft including an input section for connecting a valve actuator.

[0006] Optionally, the transparent area and the angle scale are both located on the top surface and / or side surface of the protective cover, and the angle scale is located on one side of the transparent area.

[0007] Optionally, the buckle includes a snap-fit ​​corner and a snap-fit ​​interface; the snap-fit ​​corner is located on the inner side of the protective cover, and the snap-fit ​​interface is located on the housing; or, the snap-fit ​​corner is located on the housing, and the snap-fit ​​interface is located on the inner side of the protective cover.

[0008] Optionally, a groove is provided on the outer side of the housing, and a sealing ring is provided in the groove, with the protective cover abutting against the outside of the sealing ring.

[0009] Optionally, the shell comprises a relative upper shell and lower shell, the upper shell is connected with the lower shell through an anti-off screw, and a part of the anti-off screw between the end outside the shell and the upper shell is sleeved with a first elastic member.

[0010] Optionally, the first elastic member is a tower spring.

[0011] Optionally, an angle sensor is installed on the main shaft, and the angle sensor is in communication connection with a controller for monitoring the valve opening degree.

[0012] Optionally, the main shaft is sequentially provided with a first cam and a second cam in the axial direction, the first cam and the second cam are arranged in a staggered manner in the circumferential direction, and a first switch and a second switch are installed in the shell; the first cam is provided with a first contact portion, and the first cam controls the first switch to be turned on or turned off when the first contact portion is in contact with a control button of the first switch; the second cam is provided with a second contact portion, and the second cam controls the second switch to be turned on or turned off when the second contact portion is in contact with a control button of the second switch.

[0013] Optionally, the main shaft is further provided with a first gear and a second gear, the inside of the first cam is provided with a first gear ring which is separably engaged with the first gear, and the inside of the second cam is provided with a second gear ring which is separably engaged with the second gear.

[0014] Optionally, a second elastic member in a compressed state is arranged between the first cam and the second cam, so that the first cam is in abutment on the first gear, and the second cam is in abutment on the second gear.

[0015] The above technical scheme has the following beneficial effects:

[0016] The valve feedback device provided in the application can enable an operator to see the position of the pointer from the transparent area of the shield, read the angular scale value of the valve rotation from the indicating direction of the pointer, and further obtain the opening and closing angle of the valve; the shell and the shield are clamped by the buckle, and the clamping structure is arranged between the shell and the shield, thereby increasing the convenience of installation between the shield and the shell, avoiding the exposure of the connecting member, and improving the apparent quality of the valve feedback device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is an internal structure diagram of the valve feedback device in an embodiment of the application.

[0018] Figure 2 FIG. 1 is an internal structure diagram of the valve feedback device in an embodiment of the application.

[0019] Figure 3 Structure diagram of the anti-disengagement screw connected on the upper shell and the lower shell in an embodiment of the present application.

[0020] Figure 4 Structure diagram of the anti-disengagement screw disengaging from the lower shell in an embodiment of the present application.

[0021] Figure 5 Structure diagram of the first gear in an embodiment of the present application.

[0022] Figure 6 Structure diagram of the first cam in an embodiment of the present application.

[0023] Figure 7 Top view of the valve return indicator in an embodiment of the present application.

[0024] Figure 8 Side view of the valve return indicator in an embodiment of the present application.

[0025] Reference numerals

[0026] 1 - shroud, 10 - transparent area, 11 - angle scale, 12 - clamping angle.

[0027] 2 - shell, 20 - clamping interface, 21 - upper shell, 22 - lower shell, 23 - first switch, 24 - second switch, 25 - sealing ring.

[0028] 3 - indicator, 30 - pointer.

[0029] 4 - main shaft, 40 - angle sensor, 41 - first cam, 410 - first gear ring, 42 - second cam, 43 - first gear, 44 - second gear, 45 - second elastic member.

[0030] 5 - anti-disengagement screw, 50 - first elastic member. DETAILED DESCRIPTION

[0031] The specific embodiments of the present application will be further described below in conjunction with the accompanying drawings.

[0032] It is easy to understand that, according to the technical scheme of the present application, a person skilled in the art can replace a variety of structural modes and implementation modes without changing the essential spirit of the present application. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical scheme of the present application, and should not be regarded as the whole or as a limitation or restriction on the technical scheme of the present application.

[0033] The orientation terms mentioned or possibly mentioned in the present specification, such as up, down, left, right, front, back, front side, back side, top, bottom, etc., are defined relative to the structure shown in the drawings, and are relative concepts, so they can change accordingly according to different positions and different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.

[0034] The valve feedback device provided by the present application comprises a shield 1, a shell 2, an indicator 3 and a main shaft 4.

[0035] The shield 1 is provided with a transparent area 10, and one side of the transparent area 10 is provided with an angle scale 11. The shell 2 is connected with the shield 1 through a buckle, and the buckle is located between the shell 2 and the shield 1. The indicator 3 is at least partially located in the shield 1, and a pointer 30 or a pointer mark is installed on the side of the indicator 3 facing the shield 1. The transparent area 10 is located on the movement path of the pointer 30, and when the pointer 30 is located in the transparent area 10, the angle scale 11 is located in the indicating direction of the pointer 30. The indicator 3 is installed on the main shaft 4, and the main shaft 4 comprises an input part for connecting a valve actuator.

[0036] The valve actuator is installed on the valve and is used to drive the valve to open or close or to adjust the opening degree of the valve by receiving force from a control system or an operator. The input part of the main shaft 4 is connected with the valve actuator to rotate synchronously with the valve actuator. The input part of the main shaft 4 can be installed on the valve actuator by welding, pin shaft connection, spline connection, etc., so that the main shaft 4 rotates synchronously with the valve actuator.

[0037] The pointer mark can be printed, engraved or adhered on the indicator 3.

[0038] The valve feedback device provided by the present application can enable the operator to see the position of the pointer 30 from the transparent area 10 of the shield 1 and read the angle scale 11 value of the valve rotation from the indicating direction of the pointer 30, so as to obtain the opening and closing angle of the valve. The shell 2 and the shield 1 are connected through a buckle, and the connecting structure is arranged between the shell 2 and the shield 1, which increases the convenience of installation between the shell 2 and the shield 1, avoids the exposure of the connecting member and improves the appearance quality of the valve feedback device.

[0039] In an optional arrangement of the transparent area 10 and the angle scale 11, the transparent area 10 and the angle scale 11 are located on the top surface and / or the side surface of the shield 1, and the angle scale 11 is located on one side of the transparent area 10. The transparent area 10 on the top surface is arranged as shown in Figure 7The fan-shaped or other convenient observation shape shown, and the structure of small inside and large outside, is conducive to the transparent area 10 to better show the rotation track of the pointer 30, the angle scale 11 is distributed along the inside arc of the transparent area 10, and the tip of the pointer 30 points to the angle scale 11, which is conducive to accurately indicating the rotation angle of the pointer 30, and the top surface is set to facilitate observation. The transparent area 10 on the side can be set as Figure 8 The rectangular or other convenient observation shape shown, and the tip of the pointer 30 points to the angle scale 11 located below the transparent area 10.

[0040] Among them, the transparent area 10 and the angle scale 11 can be arranged only on the top surface or the side surface of the shield 1, or both on the top surface and the side surface of the shield 1 to expand the observation angle.

[0041] In an optional embodiment of the buckle, the buckle includes a clamping corner 12 and a clamping interface 20. Among them, the clamping corner 12 can be arranged on the inside of the shield 1, and the clamping interface 20 is arranged on the shell 2, as shown in Figure 2 Or, the clamping corner 12 is arranged on the shell 2, and the clamping interface 20 is arranged on the inside of the shield 1. Both of the two clamping modes in the embodiments of the application can realize quick and convenient clamping between the shell 2 and the shield 1.

[0042] In an optional embodiment in which the clamping corner 12 cooperates with the clamping interface 20, the clamping corner 12 is a resilient protruding structure arranged on the inside of the shield 1, the clamping interface 20 is arranged in a necked opening, the clamping corner 12 is clamped into the clamping interface 20 after being squeezed, and is stably arranged in the clamping interface 20 under the limitation of the necked opening.

[0043] In an optional embodiment, a groove is formed on the outside of the shell 2, and the groove is provided with a sealing ring 25, and the shield 1 abuts against the outside of the sealing ring 25. As shown in Figure 2 The sealing ring 25 forms a sealing structure between the shield 1 and the shell 2, and increases the sealing effect between the shield 1 and the shell 2.

[0044] In an optional embodiment, the shell 2 includes an upper shell 21 and a lower shell 22 that are oppositely connected, the upper shell 21 and the lower shell 22 are connected by an anti-escape screw 5, and a first elastic member 50 is sleeved on the part of the anti-escape screw 5 between the end portion on the outside of the shell 2 and the upper shell 21. The end portion of the anti-escape screw 5 on the inside of the shell 2 is provided with a protruding structure, as shown in Figure 4The size of the convex structure is larger than the bolt hole in the upper shell 21 to prevent the anti-loosening screw 5 from being loosened from the upper shell 21. When the upper shell 21 needs to be opened, such as when the valve transmitter needs to be opened for wiring, after the anti-loosening screw 5 is loosened, the first elastic member 50 drives the anti-loosening screw to be popped up from the upper shell 21, as shown in Figure 4 , so that the operating personnel can identify the loosening state of the anti-loosening screw 5, thereby improving the operating efficiency.

[0045] In an optional embodiment, the first elastic member 50 is a coil spring. Please refer to FIGS. 3 and Figure 4 The coil spring has the characteristics of gradually increasing in outer diameter from top to bottom, with the upper end abutting against the anti-loosening screw 5 and the lower end abutting against the shell 2, thereby having good support stability and being conducive to increasing the support stability of the anti-loosening screw 5 when being tightened or loosened.

[0046] In an optional embodiment, the main shaft 4 is provided with an angle sensor 40, which is in communication connection with a controller for monitoring the valve opening degree. As shown in Figure 1 The angle sensor 40 can be fixed on the main shaft 4 by means of bolt connection, clamping or adhesion, etc., to detect the rotation angle of the main shaft 4 in real time and feed back the detection value to the controller. The controller can be a PC or other display terminal arranged in a remote control room, so that the remote operating personnel can master the valve opening degree in real time.

[0047] In an optional embodiment, the main shaft 4 is sequentially provided with a first cam 41 and a second cam 42 in the axial direction, the first cam 41 and the second cam 42 are staggered in the circumferential direction, and the shell 2 is provided with a first switch 23 and a second switch 24. The first cam 41 is provided with a first contact portion, and the first cam 41 controls the first switch 23 to be closed or disconnected when the first contact portion is in contact with the control button of the first switch 23. The second cam 42 is provided with a second contact portion, and the second cam 42 controls the second switch 24 to be closed or disconnected when the second contact portion is in contact with the control button of the second switch 24. The relative positions of the first cam 41 and the second cam 42 and the first switch 23 and the second switch 24 interact to realize the point signal detection output of the valve position.

[0048] The first contact portion is located at the distal end of the first cam 41, and the second contact portion is located at the distal end of the second cam 42. The first cam 41 and the second cam 42 convert the rotation of the main shaft 4 into a change in the distance from the first switch 23 and the second switch 24. The closing or opening of the first switch 23 and the second switch 24 is converted into an electrical signal and transmitted to the controller to feed back the opening and closing state of the valve to the controller, so that the remote operator can master the opening degree of the valve in real time. The first switch 23 and the second switch 24 are inductive switches or mechanical switches.

[0049] The included angle between the first cam 41 and the second cam 42 can be an acute angle, a right angle or an obtuse angle.

[0050] In an optional embodiment, the main shaft 4 is further provided with a first gear 43 and a second gear 44. The inside of the first cam 41 is provided with a first gear ring 410 which is separably engaged with the first gear 43. The inside of the second cam 42 is provided with a second gear ring which is separably engaged with the second gear 44. Figures 5 to 6 As shown in FIG. 5, the first gear 43 is fixed on the main shaft 4 by means of spline or the like. The first gear ring 410 in the inside of the first cam 41 is engaged with the outside of the first gear 43. At this time, the first gear 43 and the first cam 41 can rotate synchronously. When it is necessary to adjust the included angle between the first cam 41 and the second cam 42, the first cam 41 is moved to separate the first gear 43 from the first gear ring 410. After the first cam 41 is rotated by the required angle relative to the first gear 43, the first gear ring 410 is engaged with the outside of the first gear 43 again. The second gear 44 and the second cam 42 can adopt the above-mentioned engagement mode between the first gear 43 and the first cam 41.

[0051] In an optional embodiment, a second elastic member 45 in a compressed state is arranged between the first cam 41 and the second cam 42. The first cam 41 abuts against the first gear 43, and the second cam 42 abuts against the second gear 44. When it is necessary to adjust, the second elastic member 45 is compressed to separate the first gear 43 from the first cam 41 and / or the second gear 44 from the second cam 42. After the adjustment is completed, the first cam 41 abuts against the first gear 43 again and the second cam 42 abuts against the second gear 44 again under the elastic action of the second elastic member 45.

[0052] In addition, in view of sealing, sealing rings are arranged at the abutting portions of the upper shell 21 and the lower shell 22, the abutting portions of the shroud 1 and the upper shell 21, and the portion of the main shaft 4 extending out of the lower shell 22.

[0053] According to the need, the above technical solutions can be combined to achieve the best technical effect.

[0054] The above is only the principle and the preferred embodiment of the present application. It should be pointed out that for ordinary skilled in the art, on the basis of the principle of the present application, a number of other variants can also be made, and should be considered as the protection scope of the present application.

Claims

1. A valve positioner, characterized by, The utility model relates to a kind of valve positioner, including: Shield, the shield is equipped with transparent area, one side of the transparent area is equipped with angle scale; Shell, the shell is connected with the shield by buckle, the buckle is located between the shell and the shield; Pointer, the pointer is at least partially located in the shield, the pointer is installed with pointer or is equipped with pointer mark towards the shield side, the transparent area is located in the movement path of the pointer, the angle scale is located in the indicating direction of the pointer when the pointer is located in the transparent area; Main shaft, the pointer is installed on the main shaft, the main shaft includes input part for connecting valve actuator.

2. The valve annunciator of claim 1, wherein The transparent area and the angle scale are located on the top surface and / or side surface of the shield, and the angle scale is located on one side of the transparent area.

3. The valve annunciator of claim 1, wherein The buckle includes a clamping corner and a clamping interface that are clamped together. The clamping corner is arranged on the inner side of the shield, and the clamping interface is arranged on the shell. Alternatively, the clamping corner is arranged on the shell, and the clamping interface is arranged on the inner side of the shield.

4. The valve positioner of claim 3 wherein, A groove is formed on the outer side of the shell, and a sealing ring is arranged in the groove. The shield abuts the outer side of the sealing ring.

5. The valve positioner of claim 1 wherein, The shell includes an upper shell and a lower shell that are connected by an anti-disengagement screw. The anti-disengagement screw is sleeved with a first elastic member between the end portion on the outer side of the shell and the upper shell.

6. The valve annunciator of claim 5, wherein The first elastic member is a torsion spring.

7. The valve annunciator of claim 1, wherein An angle sensor is installed on the main shaft, and the angle sensor is communicatively connected to a controller that monitors the valve opening.

8. The valve annunciator according to any one of claims 1-7, wherein The main shaft is sequentially provided with a first cam and a second cam in the axial direction. The first cam and the second cam are arranged in a staggered manner in the circumferential direction. A first switch and a second switch are installed in the shell. The first cam is provided with a first contact portion. When the first contact portion of the first cam is in contact with the control button of the first switch, the first switch is controlled to be turned on or off. The second cam is provided with a second contact portion. When the second contact portion of the second cam is in contact with the control button of the second switch, the second switch is controlled to be turned on or off.

9. The valve annunciator of claim 8, wherein, The main shaft is further provided with a first gear and a second gear. The interior of the first cam is provided with a first gear ring that is separably engaged with the first gear. The interior of the second cam is provided with a second gear ring that is separably engaged with the second gear.

10. The valve annunciator of claim 9, wherein A second elastic member in a compressed state is arranged between the first cam and the second cam, so that the first cam abuts the first gear, and the second cam abuts the second gear.

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