Valve position indicator

Abstract

The utility model relates to a valve position indicator. Comprising a shell, a reed switch assembly, a rotary disc assembly and a deep groove ball bearing. The shell is composed of a shell rear cover, a shell main part and a sealing device, the shell rear cover and the shell main part are connected with each other, a first cavity is formed between the shell rear cover and the shell main part, and the reed switch assembly is located in the first cavity; a second cavity is formed between the side, away from the shell rear cover, of the shell main part and the valve, and the shell main part and the valve are connected through a third screw and a third spring gasket. The shell main part is connected with the valve through a third bolt and a third sealing gasket to form a unified sealing boundary to jointly bear the pressure and temperature of a valve medium. The rotary disc assembly is located in the second cavity, and the deep groove ball bearing is located between the shell main part and the rotary disc assembly. The valve position signal detection device can be used as a valve position signal detection device and can play a role in indicating whether the valve is closed or opened in place or not.

Description

Technical Field

[0001] The utility model relates to the technical field of valve position signal detection, and specifically relates to a valve position indicator. Background Technique

[0002] With the continuous development of automation technology, in order to reduce the labor intensity of workers and improve work efficiency, the demand for electric valves in all walks of life is increasing. When using an electric valve, it is not only necessary to achieve automatic control of the valve action, but also to detect whether the valve is opened or closed to a specified position. Some automation equipment in the fields of atomic energy, aerospace, petroleum, chemical industry, light industry, food, etc. needs to transport special liquids with toxicity, corrosiveness, high temperature, high pressure, etc. Due to the danger of these liquids, during operation, it is required to be completely leak-free, and at the same time, it is often necessary to automatically open and close the valve to control the liquid. This requires a driving device to drive the valve to open and close automatically, and at the same time, it is necessary to ensure that the transported liquid is leak-free. Currently, a shielded valve electric driving device is widely used.

[0003] The shielded valve electric driving device mainly consists of a shielded three-phase AC asynchronous motor and a gear reducer. The output shaft of the valve driving device is directly connected to the valve core of the valve (such as a ball valve), and it is impossible to directly judge the open and closed states of the valve externally. Since it is relatively difficult to accurately control the angular stroke of a three-phase AC asynchronous motor, it is very necessary to detect whether the valve is fully opened or fully closed during the process of automatically controlling the opening and closing of the valve. For the shielded valve electric driving device, it is currently impossible to use a servo motor and a stepping motor to accurately control the angular stroke, especially in high-temperature and high-pressure working conditions, and only a three-phase AC asynchronous motor can be used to drive. In order to avoid the valve not being fully opened or closed in place and ensure accurate control of the valve, it is very necessary to set a valve opening and closing position indicator on the valve. Content of the Utility Model

[0004] In view of the defects of the prior art, the utility model provides a valve position indicator, which can be used as a valve position signal detection device and can play a role in indicating whether the valve is fully closed or opened. It is mainly applicable to valve types that rotate 90° to open or close, such as ball valves.

[0005] In order to achieve the above purpose, the technical solution provided by the utility model is a valve position indicator, which includes a housing, a reed switch assembly, a rotary disk assembly and a deep groove ball bearing;

[0006] The housing is composed of a housing rear cover, a housing main body and a sealing device. The housing rear cover and the housing main body are connected to each other, and there is a first cavity between the housing rear cover and the housing main body. The reed switch assembly is located in the first cavity;

[0007] There is a second cavity between the side of the main housing away from the housing back cover and the valve, and the main housing and the valve are connected by a third screw and a third spring washer. The main housing and the valve are coupled through a third bolt and a third sealing gasket to form a unified sealing boundary, jointly bearing the valve medium pressure and temperature.

[0008] The rotary disk assembly is located in the second cavity, and the deep groove ball bearing is located between the main housing and the rotary disk assembly.

[0009] Further, the housing back cover and the main housing are connected by a second screw and a second spring washer.

[0010] Further, the sealing device is a sealing ring, the sealing ring is an O-ring, and the O-ring includes a first group of sealing rings and a second group of sealing rings.

[0011] Further, on the main housing, the surface parallel to the rotation axis of the main housing and close to the inner surface of the inner ring of the deep groove ball bearing is the first surface, the first groove surface is located on the first surface, the shaft retaining ring is located on the first groove surface, the surface on the main housing and perpendicular to the first surface is the second surface, one side surface of the inner ring of the deep groove ball bearing abuts against the shaft retaining ring, and the other side surface of the inner ring of the deep groove ball bearing abuts against the second surface;

[0012] On the rotary disk, the surface parallel to the rotation axis of the rotary disk and close to the outer surface of the outer ring of the deep groove ball bearing is the third surface, the second groove surface is located on the third surface, the hole retaining ring is located on the second groove surface, the surface on the rotary disk and perpendicular to the third surface is the fourth surface, one side surface of the outer ring of the deep groove ball bearing abuts against the hole retaining ring, and the other side surface of the outer ring of the deep groove ball bearing abuts against the fourth surface.

[0013] Further, it further includes an electrical connector, and the electrical connector is connected to the main housing by a first screw and a first spring washer.

[0014] Further, the reed switch assembly includes a reed switch, a reed switch frame, a gland and a lead wire, the reed switch frame is located between the gland and the main housing, the gland is connected to the main housing by a fourth screw and a fourth spring washer, and there is a third cavity between the gland and the main housing.

[0015] Further, it further includes an adjusting gasket, and the adjusting gasket is located between the reed switch frame and the main housing. The adjusting gasket is used to adjust the axial position of the reed switch.

[0016] There are side grooves provided on the reed switch frame. The reed switches are arranged in the side grooves of the reed switch frame and are connected to the external electric control system through lead wires passing through the inner cavity of the electric connector. There are two reed switches, and the two reed switches are respectively located in the two side grooves of the reed switch frame, with one as a spare while the other is in use. The reed switch assembly is fixed to the inner side of the main housing part through a gland, a fourth screw, a fourth spring washer and an adjusting washer, and the adjusting washer is used to adjust the axial position of the reed switch.

[0017] Further, the rotary disk assembly includes a rotary disk and a permanent magnet, and the permanent magnet is installed on the rotary disk; the permanent magnet rotates with the rotary disk. When the permanent magnet approaches the reed switch, the reed switch will emit a signal to indicate that the valve is in a fully closed or fully open state.

[0018] Further, the rotary disk is in a circular ring shape, and four convex parts protruding from the edge part of the rotary disk are arranged at intervals in the circumferential direction of the rotary disk. Among them, permanent magnet mounting holes are provided on two of the convex parts on the same diameter, and the permanent magnet mounting holes are used for installing the permanent magnet.

[0019] Further, an uneven claw surface is provided at one end of the rotary disk close to the valve, and the rotary disk assembly is connected to the valve core of the valve through the uneven claw surface. When the valve core of the valve rotates, it will drive the rotation of the rotary disk. When the permanent magnet on the rotary disk rotates to a position close to the reed switch, the reed switch will emit a signal to indicate that the valve has been fully closed or fully opened. The utility model can be used as a valve position signal detection device and can play a role in indicating whether the valve is closed or opened in place.

[0020] The beneficial effects of the utility model: During the opening and closing process of the valve, the main housing part and the valve form a unified sealing boundary through bolts and sealing gaskets, and jointly bear the medium transportation, control the system pressure and high temperature; the rotary disk assembly is connected to the valve core of the valve through an uneven claw structure. When the valve opening changes, it will drive the rotary disk assembly to rotate; when the permanent magnet arranged on the rotary disk assembly rotates to the position of the reed switch, the reed switch will have a closing action, connect the electrical circuit and emit a signal that the valve has been fully opened or fully closed. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a valve position indicator in an embodiment of the utility model;

[0022] Figure 2 is Figure 1 right view;

[0023] Figure 3 is Figure 1 left view;

[0024] Figure 4Schematic diagram of the structure of the main housing component in an embodiment of the present utility model;

[0025] Figure 5 Side view of the reed switch assembly in an embodiment of the present utility model;

[0026] Figure 6 Front view of the reed switch assembly in an embodiment of the present utility model;

[0027] Figure 7 Side view of the rotary disk assembly in an embodiment of the present utility model;

[0028] Figure 8 Front view of the rotary disk assembly in an embodiment of the present utility model;

[0029] Figure 9 3D view of the rotary disk assembly in an embodiment of the present utility model.

[0030] In the figure:

[0031] 100, housing, 110, housing rear cover, 120, main housing component, 121, first surface, 122, first groove surface, 123, second surface, 130, electrical connector, 140, first screw, 141, first spring washer, 150, second screw, 151, second spring washer, 160, first group of sealing rings, 170, second group of sealing rings, 180, third screw, 181, third spring washer,

[0032] 200, reed switch assembly, 210, gland, 220, fourth screw, 221, fourth spring washer, 230, reed switch, 240, reed switch frame, 250, adjusting gasket, 260, shaft retaining ring, 270, lead wire,

[0033] 300, rotary disk assembly, 310, rotary disk, 311, third surface, 312, second groove surface, 313, fourth surface, 314, convex and concave claw surface, 320, permanent magnet, 330, hole retaining ring,

[0034] 400, deep groove ball bearing, 500, valve. Detailed implementation manners

[0035] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific implementation manners of the present utility model will be given in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0036] Reference Figures 1-9 , showing a valve position indicator in an embodiment of the present utility model, which is applied to an electric valve driven by a shielded valve electric drive device. In addition to the application scenario in this embodiment, the valve position indicator can also be used in other occasions that require indicating the open and closed states of the valve. It includes a housing 100, a reed switch assembly 200, a rotary disk assembly 300, and a deep groove ball bearing 400;

[0037] The housing 100 is composed of a housing rear cover 110, a housing main body 120, and a sealing device. The housing rear cover 110 and the housing main body 120 are connected to each other. There is a first cavity between the housing rear cover 110 and the housing main body 120, and the reed switch assembly 200 is located in the first cavity;

[0038] There is a second cavity between the side of the housing main body 120 away from the housing rear cover 110 and the valve 500. The housing main body 120 and the valve 500 are connected by a third screw 180 and a third spring washer 181. The housing main body 120 is connected to the valve 500 through a third bolt 180 and a third sealing washer 181 to form a unified sealing boundary, jointly bearing the valve medium pressure and temperature.

[0039] The rotary disk assembly 300 is located in the second cavity, and the deep groove ball bearing 400 is located between the housing main body 120 and the rotary disk assembly 300.

[0040] Further, the housing rear cover 110 and the housing main body 120 are connected by a second screw 150 and a second spring washer 151.

[0041] Further, the sealing device is a sealing ring, the sealing ring is an O-ring, and the O-ring includes a first group of sealing rings 160 and a second group of sealing rings 170.

[0042] Further, on the housing main body 120, the surface parallel to the rotation axis of the housing main body 120 and close to the inner surface of the inner ring of the deep groove ball bearing 400 is the first surface 121. The first groove surface 122 is located on the first surface 121, and the shaft retaining ring 260 is located on the first groove surface 122. The surface on the housing main body 120 and perpendicular to the first surface 121 is the second surface 123. One side surface of the inner ring of the deep groove ball bearing 400 abuts against the shaft retaining ring 260, and the other side surface of the inner ring of the deep groove ball bearing 400 abuts against the second surface 123;

[0043] On the rotating disk 310, the surface parallel to the axis of rotation of the rotating disk 310 and close to the outer surface of the outer ring of the deep groove ball bearing 400 is the third surface 311. The second groove surface 312 is located on the third surface 311. The snap ring for hole 330 is located on the second groove surface 312. The surface on the rotating disk 310 and perpendicular to the third surface 311 is the fourth surface 313. One side surface of the outer ring of the deep groove ball bearing 400 abuts against the snap ring for hole 330, and the other side surface of the outer ring of the deep groove ball bearing 400 abuts against the fourth surface 313.

[0044] Further, it further includes an electrical connector 130. The electrical connector 130 is connected to the main housing 120 through a first screw 140 and a first spring washer 141.

[0045] Further, the reed switch assembly 200 includes a reed switch 230, a reed switch frame 240, a gland 210, and a lead wire 270. The reed switch frame 240 is located between the gland 210 and the main housing 120. The gland 210 is connected to the main housing 120 through a fourth screw 220 and a fourth spring washer 221. There is a third cavity between the gland 210 and the main housing 120.

[0046] Further, it further includes an adjusting gasket 240. The adjusting gasket 240 is located between the reed switch frame 240 and the main housing 120. The adjusting gasket 240 is used to adjust the axial position of the reed switch 230.

[0047] The reed switch frame 240 is provided with side grooves. The reed switch 230 is arranged in the side grooves of the reed switch frame 240 and is connected to the external electric control system through the lead wire 270 passing through the inner cavity of the electrical connector 130. There are two reed switches 230, and the two reed switches 230 are respectively located in the two side grooves of the reed switch frame 240, one for use and one for backup. The reed switch assembly 200 is fixed to the inner side of the main housing 120 through the gland 210, the fourth screw 220, the fourth spring washer 221, and the adjusting gasket 250. The adjusting gasket 250 is used to adjust the axial position of the reed switch 230.

[0048] Further, the rotating disk assembly 300 includes a rotating disk 310 and a permanent magnet 320. The permanent magnet 320 is installed on the rotating disk 310; the permanent magnet 320 rotates with the rotating disk 310. When the permanent magnet 320 approaches the reed switch 230, the reed switch 230 will send out a signal to indicate that the valve 500 is in a fully closed or fully open state.

[0049] Further, the rotary disk 310 is annular, and four convex portions protruding from the edge portion of the rotary disk 310 are arranged at intervals in the circumferential direction of the rotary disk 310. Permanent magnet mounting holes are provided on two of the convex portions on the same diameter, and the permanent magnet mounting holes are used for mounting the permanent magnets 320.

[0050] Further, a concavo-convex claw surface 314 is provided at one end of the rotary disk 310 close to the valve 500, and the rotary disk assembly 300 is connected to the valve core of the valve 500 through the concavo-convex claw surface 312. When the valve core of the valve 500 rotates, it will drive the rotation of the rotary disk 310. When the permanent magnet 320 on the rotary disk 310 rotates to a position close to the reed switch 230, the reed switch 230 will send out a signal, indicating that the valve 500 is fully closed or fully opened. The utility model can be used as a valve position signal detection device and can play a role in indicating whether the valve is closed or opened in place.

[0051] In the description of the present utility model, it should be understood that the terms "axis", "coaxial", "vertical", "side surface", "inner side", "outer side", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0052] In addition, the terms "first", "second", "third", "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0053] In the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0054] In the present utility model, unless otherwise clearly stipulated and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature. It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element present. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element present at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manners.

Claims

1. A valve position indicator, characterized in that: It includes a housing, a reed switch assembly, a rotary disk assembly and a deep groove ball bearing; The housing is composed of a housing rear cover, a housing main body and a sealing device. The housing rear cover and the housing main body are connected to each other. There is a first cavity between the housing rear cover and the housing main body, and the reed switch assembly is located in the first cavity; There is a second cavity between the side of the housing main body away from the housing rear cover and the valve. The housing main body and the valve are connected by a third screw and a third spring washer; The housing main body is connected to the valve through a third bolt and a third sealing gasket to form a unified sealing boundary, and jointly bears the valve medium pressure and temperature; The rotary disk assembly is located in the second cavity, and the deep groove ball bearing is located between the housing main body and the rotary disk assembly.

2. The valve position indicator according to claim 1, wherein: The housing rear cover and the housing main body are connected by a second screw and a second spring washer.

3. A valve position indicator according to claim 1, characterized in that: The sealing device is a sealing ring, and the sealing ring is an O-ring. The O-ring includes a first group of sealing rings and a second group of sealing rings.

4. A valve position indicator according to claim 1, characterized in that: On the housing main body, the surface parallel to the rotation axis of the housing main body and close to the inner surface of the inner ring of the deep groove ball bearing is the first surface. The first groove surface is located on the first surface, and the shaft retaining ring is located on the first groove surface. The surface on the housing main body perpendicular to the first surface is the second surface. One side surface of the inner ring of the deep groove ball bearing abuts against the shaft retaining ring, and the other side surface of the inner ring of the deep groove ball bearing abuts against the second surface; On the rotary disk, the surface parallel to the rotation axis of the rotary disk and close to the outer surface of the outer ring of the deep groove ball bearing is the third surface. The second groove surface is located on the third surface, and the hole retaining ring is located on the second groove surface. The surface on the rotary disk perpendicular to the third surface is the fourth surface. One side surface of the outer ring of the deep groove ball bearing abuts against the hole retaining ring, and the other side surface of the outer ring of the deep groove ball bearing abuts against the fourth surface.

5. A valve position indicator according to claim 1, characterized in that: It also includes an electrical connector, and the electrical connector is connected to the housing main body through a first screw and a first spring washer.

6. A valve position indicator according to claim 1, characterized in that: The reed switch assembly includes a reed switch, a reed switch frame, a gland and a lead wire. The reed switch frame is located between the gland and the housing main body. The gland is connected to the housing main body through a fourth screw and a fourth spring washer. There is a third cavity between the gland and the housing main body.

7. A valve position indicator according to claim 6, characterized in that: It also includes an adjusting gasket, and the adjusting gasket is located between the reed switch frame and the housing main body. The adjusting gasket is used to adjust the axial position of the reed switch; The reed switch frame is provided with side grooves. The reed switch is arranged in the side grooves of the reed switch frame and is connected to the external electronic control system through the lead wire passing through the inner cavity of the electrical connector. There are two reed switches, and the two reed switches are respectively located in the two side grooves of the reed switch frame, one for use and one for backup. The reed switch assembly is fixed on the inner side of the housing main body through the gland, the fourth screw, the fourth spring washer and the adjusting gasket, and the adjusting gasket is used to adjust the axial position of the reed switch.

8. A valve position indicator according to claim 1, characterized in that: The rotating disk assembly includes a rotating disk and a permanent magnet. The permanent magnet is installed on the rotating disk. The permanent magnet rotates with the rotating disk. When the permanent magnet approaches the reed switch, the reed switch will emit a signal to indicate that the valve is in a fully closed or fully open state.

9. The valve position indicator according to claim 8, wherein: The rotating disk is annular. Four protruding parts that protrude from the edge part of the rotating disk are arranged at intervals in the circumferential direction of the rotating disk. Among them, permanent magnet mounting holes are provided on two of the protruding parts on the same diameter. The permanent magnet mounting holes are used for mounting permanent magnets.

10. A valve position indicator according to claim 8, characterized in that: An uneven claw surface is provided at one end of the rotating disk close to the valve. The rotating disk assembly is connected to the valve core through the uneven claw surface.

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