Explosion-proof valve position switch

Abstract

The utility model provides an explosion-proof valve position switch which comprises an indication cover assembly which comprises an upper cover, a compression bolt, an indication cover outer shell, a clamping groove, an indication cover shade, a clamping block, an indication cover inner shell and a fixing bolt. According to the utility model, the indication cover shell is compressed by the compression bolt, and when the position of the tail end of the stroke of the automatic control valve is not accurate, the compression bolt can be loosened, and the indication cover shell is manually rotated, so that the indication cover shade is driven to rotate, and the shade part completely covers a corresponding area. The wiring terminals are segmented according to functions, are small in size and can be flexibly and compactly installed in the valve position switch, the overall size of the valve position switch is reduced, and the field installation and use space is saved. When the upper cover is disassembled and the threads of the fixing bolt are completely separated from the threads of the mounting hole of the body, the fixing bolt cannot be continuously matched with the threads of the upper cover to rotate due to the existence of the counterbore structure of the upper cover without the interference of human factors, so that the fixing bolt cannot be continuously screwed out.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve position switch, especially to an explosion -proof valve position switch, belongs to valve position switch technical field. BACKGROUND

[0002] Valve position switch is the key field instrument in automatic control system, is used for detecting valve switch state and this state with switch quantity signal output to external or remote monitoring equipment. Valve position switch is connected with automatic control valve, converts the position state of automatic control valve into electric signal and exports to control terminal, simultaneously through valve position switch indicating cover shows the position state of automatic control valve to field user. Valve position switch is various, including contact type and proximity type etc., is widely used in various industrial control fields.

[0003] The existing valve position switch has the following problems when using:

[0004] 1, indicating cover shell is directly fixed on the upper cover through bolt, leading to indicating cover position can not be adjusted. When the automatic control valve operating position has error, indicating cover can not completely cover the corresponding area, thereby affecting the indication accuracy of switch.

[0005] 2, the wiring terminal of valve position switch is 8-bit integral design, length and size are big, occupy more space inside valve position switch, and wiring hole is located at both sides, further increase the overall size of valve position switch.

[0006] 3, when disassembling the upper cover of valve position switch, fixed bolt is easy to completely fall off from the upper cover, which brings inconvenience to maintenance and operation.

[0007] Therefore, an explosion -proof valve position switch is provided. UTILITY MODEL CONTENTS

[0008] Therefore, the utility model provides an explosion -proof valve position switch to solve or alleviate one of the technical problems in the prior art, at least to provide a beneficial choice.

[0009] The technical scheme of the utility model embodiment is realized as follows: an explosion -proof valve position switch, including indicating cover assembly, the indicating cover assembly includes upper cover, compression bolt, indicating cover shell, clamping groove, indicating cover shade, clamping block, indicating cover inner shell and fixed bolt, the top of the upper cover is connected with compression bolt in symmetry screw thread, the top of the upper cover is installed with indicating cover shell, the bottom of the indicating cover shell is opened in symmetry with clamping groove, the inside of the clamping groove is inserted with clamping block, one side of the clamping block is fixedly connected with indicating cover shade, the inside of the indicating cover shade is rotatably connected with indicating cover inner shell, the inner side wall of the upper cover is provided with fixed bolt,

[0010] The bottom of the indicating cover assembly is provided with main body assembly.

[0011] Further preferably, the main body assembly comprises a switch main body, a threaded hole and a countersunk hole.

[0012] The bottom of the upper cover is fixedly connected with a switch main body, the inside of the switch main body is uniformly provided with a countersunk hole, and the bottom of the countersunk hole is provided with a threaded hole.

[0013] Further preferably, the fixing bolt is threadedly connected to the inside of the threaded hole.

[0014] Further preferably, the switch main body is symmetrically provided with a wiring hole on one side.

[0015] Further preferably, the inside wall of the switch main body is symmetrically mounted with a wiring terminal.

[0016] Further preferably, the bottom of the switch main body is fixedly connected with a support.

[0017] Further preferably, the inside wall of the switch main body is rotatably connected with a central shaft, the outside wall of the central shaft is fixedly connected with a gear, the outside wall of the gear is engaged with a cam, and the top end of the central shaft is fixedly connected with an indicating cover inner shell.

[0018] Further preferably, the inside wall of the switch main body is mounted with an induction switch, and the induction switch is arranged on one side of the cam.

[0019] The embodiment of the utility model has the following advantages due to the adoption of the above technical scheme.

[0020] 1. The utility model discloses a pressure bolt for pressing the indicating cover shell, when the automatic control valve stroke end position is not accurate, the pressure bolt can be loosened, the indicating cover shell is manually rotated, the indicating cover cover is rotated, and the cover part completely covers the corresponding area.

[0021] 2. The utility model discloses a wiring terminal segmented according to functions, and the terminal size is small, which can be flexibly and compactly installed in the valve position switch, thereby reducing the overall size of the valve position switch, saving the installation and use space, and arranging the wiring hole of the valve position switch on one side of the valve position switch to further reduce the overall size of the valve position switch.

[0022] 3. When the upper cover is disassembled, when the threaded connection of the fixing bolt is completely disengaged from the threaded hole of the body mounting hole, the fixing bolt cannot continue to rotate with the upper cover thread cooperation due to the existence of the upper cover countersunk hole structure without human factors interference, so that the fixing bolt cannot continue to be rotated out. At the same time, due to the cooperation of the upper cover threaded hole and the non-threaded section of the fixing bolt, the fixing bolt also cannot fall off from the upper cover mounting hole, thereby facilitating the installation and operation of the valve position switch.

[0023] The above summary is intended to illustrate the application and is not intended to be limiting thereof. Further aspects, embodiments and features of the application will become apparent from the detailed description in conjunction with the accompanying drawings and the following description. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0025] Figure 1 is a structural diagram of the present application;

[0026] Figure 2 is an internal structure diagram of the switch main body of the present application;

[0027] Figure 3 is a structure diagram of the threaded hole and the counterbore hole of the present application;

[0028] Figure 4 is a structure diagram of the indicating cover cover of the present application;

[0029] Figure 5 is a structure diagram of the indicating cover shell of the present application.

[0030] Reference signs: 10, indicating cover assembly; 11, upper cover; 12, compression bolt; 13, indicating cover shell; 14, clamping groove; 15, indicating cover cover; 16, clamping block; 17, indicating cover inner shell; 18, fixing bolt; 20, main body assembly; 21, switch main body; 22, support; 23, wiring hole; 24, wiring terminal; 25, center shaft; 26, gear; 27, cam; 28, induction switch; 29, threaded hole; 210, counterbore hole. DETAILED DESCRIPTION

[0031] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0032] The embodiments of the present application will be described in detail below with reference to the drawings.

[0033] As Figures 1-5The utility model discloses an explosion -proof valve position switch, including indicating cover subassembly 10, indicating cover subassembly 10 includes upper cover 11, compression bolt 12, indicating cover shell 13, clamping groove 14, indicating cover shade 15, clamping block 16, indicating cover inner shell 17 and fixed bolt 18, the top symmetry of upper cover 11 is connected with compression bolt 12, and the top of upper cover 11 is installed with indicating cover shell 13, and the bottom of indicating cover shell 13 is opened with the symmetry clamping groove 14, and the inside of clamping groove 14 is inserted with clamping block 16, and one side of clamping block 16 is fixedly connected with indicating cover shade 15, and the inside of indicating cover shade 15 is rotatably connected with indicating cover inner shell 17, and the inner side wall of upper cover 11 is provided with fixed bolt 18,

[0034] The bottom of the indicating cover assembly 10 is provided with a main body assembly 20.

[0035] In this embodiment, specifically: the main body assembly 20 includes a switch main body 21, a threaded hole 29, and a countersunk hole 210.

[0036] The bottom of the upper cover 11 is fixedly connected with the switch main body 21, the switch main body 21 is uniformly provided with the countersunk hole 210 in the inside, the bottom of the countersunk hole 210 is provided with the threaded hole 29, and the fixed bolt 18 cannot continue to threadedly cooperate with the upper cover 11 and rotate due to the existence of the countersunk hole 210 structure without human factors interference, so that it is ensured that the fixed bolt 18 will not continue to be unscrewed.

[0037] In this embodiment, specifically: the fixed bolt 18 is threadedly connected in the inside of the threaded hole 29, and when the fixed bolt 18 is completely disengaged from the threaded hole 29, the fixed bolt 18 will not fall off from the upper cover 11 due to the cooperation of the threaded hole 29 and the fixed bolt 18 without a threaded segment, so that the installation and operation of the valve position switch are facilitated.

[0038] In this embodiment, specifically: one side of the switch main body 21 is symmetrically provided with a wiring hole 23, and the wiring hole 23 is arranged on one side of the valve position switch, further reducing the overall size of the valve position switch.

[0039] In this embodiment, specifically: the inner side wall of the switch main body 21 is symmetrically provided with a wiring terminal 24, and the wiring terminal 24 is segmented according to functions, and the terminal size is small, which can be flexibly and compactly installed in the valve position switch, reducing the overall size of the valve position switch.

[0040] In this embodiment, specifically: the bottom of the switch main body 21 is fixedly connected with a bracket 22, and the bracket 22 is installed on an automatic control valve.

[0041] In this embodiment, specifically: the inner side wall of the switch body 21 is rotatably connected with a center shaft 25, the outer side wall of the center shaft 25 is fixedly connected with a gear 26, the outer side wall of the gear 26 is engaged with a cam 27, the top end of the center shaft 25 is fixedly connected with the indicating cover inner shell 17, the center shaft 25 of the valve position switch rotates to drive the gear 26 on the shaft, and the gear 26 drives the cam 27 engaged therewith to rotate.

[0042] In this embodiment, specifically: the inner side wall of the switch body 21 is rotatably connected with a center shaft 25, the outer side wall of the center shaft 25 is fixedly connected with a gear 26, the outer side wall of the gear 26 is engaged with a cam 27, the top end of the center shaft 25 is fixedly connected with the indicating cover inner shell 17, the center shaft 25 of the valve position switch rotates to drive the gear 26 on the shaft, and the gear 26 drives the cam 27 engaged therewith to rotate.

[0043] In this embodiment, specifically: the inner side wall of the switch body 21 is rotatably connected with a center shaft 25, the outer side wall of the center shaft 25 is fixedly connected with a gear 26, the outer side wall of the gear 26 is engaged with a cam 27, the top end of the center shaft 25 is fixedly connected with the indicating cover inner shell 17, the center shaft 25 of the valve position switch rotates to drive the gear 26 on the shaft, and the gear 26 drives the cam 27 engaged therewith to rotate.

[0044] When the stroke end position of the automatic control valve is not accurate enough, the user loosens the indicating cover pressing bolt 12, manually rotates the indicating cover shell 13, thereby driving the indicating cover shade 15 to rotate, so that the shade part completely covers the corresponding area.

[0045] The wiring terminal 24 is segmented according to functions, has small terminal size, can be flexibly and compactly installed in the valve position switch, reduces the overall size of the valve position switch, saves the installation and use space on site, and the valve position switch wiring hole 23 is arranged on one side of the valve position switch, so that the overall size of the valve position switch is further reduced.

[0046] When the upper cover 11 is disassembled, when the threaded hole 29 is completely disengaged from the engagement of the fixed bolt 18, the fixed bolt 18 cannot continue to be screwed out due to the existence of the countersunk hole 210 structure without human factors interference, so that it is ensured that the fixed bolt 18 will not continue to be screwed out. At the same time, due to the cooperation of the threaded hole 29 and the non-threaded section of the fixed bolt 18, the fixed bolt 18 will not fall off from the upper cover 11, facilitating the installation and operation of the valve position switch.

[0047] The above merely illustrates the specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of various changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An explosion-proof valve positioner switch comprising an indicator cap assembly (10), characterized by: The indicating cover assembly (10) comprises an upper cover (11), a compression bolt (12), an indicating cover shell (13), a clamping groove (14), an indicating cover cover (15), a clamping block (16), an indicating cover inner shell (17) and a fixing bolt (18); the top of the upper cover (11) is symmetrically connected with the compression bolt (12), the top of the upper cover (11) is provided with the indicating cover shell (13), the bottom of the indicating cover shell (13) is symmetrically provided with the clamping groove (14), the inside of the clamping groove (14) is inserted with the clamping block (16), one side of the clamping block (16) is fixedly connected with the indicating cover cover (15), the inside of the indicating cover cover (15) is rotatably connected with the indicating cover inner shell (17), and the inner side wall of the upper cover (11) is provided with the fixing bolt (18). The bottom of the indicating cover assembly (10) is provided with a main body assembly (20).

2. An explosion-proof valve positioner according to claim 1, characterized in that: The main body assembly (20) comprises a switch main body (21), a threaded hole (29) and a countersunk hole (210). The bottom of the upper cover (11) is fixedly connected with the switch main body (21), the inside of the switch main body (21) is uniformly provided with the countersunk hole (210), and the bottom of the countersunk hole (210) is provided with the threaded hole (29).

3. An explosion-proof valve positioner according to claim 2, characterized in that: The fixing bolt (18) is threadedly connected in the threaded hole (29).

4. An explosion-proof valve positioner according to claim 2, wherein: One side of the switch main body (21) is symmetrically provided with a wiring hole (23).

5. An explosion-proof valve positioner according to claim 2, wherein: The inner side wall of the switch main body (21) is symmetrically provided with a wiring terminal (24).

6. An explosion-proof valve positioner according to claim 2, wherein: The bottom of the switch main body (21) is fixedly connected with a support (22).

7. An explosion-proof valve positioner according to claim 2, wherein: The inner side wall of the switch main body (21) is rotatably connected with a center shaft (25), the outer side wall of the center shaft (25) is fixedly connected with a gear (26), the outer side wall of the gear (26) is engaged with a cam (27), and the top end of the center shaft (25) is fixedly connected with the indicating cover inner shell (17).

8. An explosion-proof valve positioner according to claim 7, characterized in that: The inner side wall of the switch main body (21) is provided with an induction switch (28), and the induction switch (28) is arranged on one side of the cam (27).

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