Electro-pneumatic valve positioner convenient for circuit connection

Abstract

The utility model discloses an electro-pneumatic valve positioner convenient for circuit connection, which belongs to the technical field of electro-pneumatic valve positioners and comprises a valve positioner main body, a junction box is arranged on the outer surface of the valve positioner main body, and a quick connection mechanism is arranged on the upper surface of the junction box. An observation mechanism is arranged in an inner cavity of the quick connecting mechanism, a movable rod is pulled outwards to drive a limiting rod to move outwards to extrude a connecting spring and leave an inner cavity of a protruding rod, at the moment, the protruding rod loses fixed limiting, the protruding rod is held to drive an observation window to be turned over to be opened, and an access hole is exposed, so that an operator can conveniently conduct connection or reinforcement treatment on a circuit; the operation is simple and trouble-saving, is suitable for the situation that the local part needs simple line connection, maintenance and the like, and compared with the traditional tedious operation that line inspection and connection can be carried out only after the whole box cover is completely opened, the operation is more convenient, and the operation time is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric valve positioners, and more specifically, to an electric valve positioner facilitating connection of circuits. Background Art

[0002] An electric valve positioner is a device used to control the accurate position of a valve. It is widely applied in an automatic control system in particular. It can convert an electric signal output by a controller into mechanical motion so as to drive the valve to a desired position. It completes the wiring work by connecting multiple electric wires through a junction box.

[0003] Chinese Patent Grant Publication No.: CN 210128113 U provides a unidirectional electric valve positioner, which includes a valve positioner main body. A junction box is arranged on the valve positioner main body. A box cover is arranged on the junction box. A fixing cavity is formed inside the box cover. A fixing block, a positioning rod, a limiting block, a return spring, a steel wire rope and a buckle are arranged inside the fixing cavity. For this unidirectional electric valve positioner, through the contact between the insertion rod on the box cover and the circular groove on the junction box, the connection position between the box cover and the junction box is limited, so that the positioning rod on the box cover is convenient to contact with the groove inside the junction box. Since the return spring contracts, it will push the limiting block to drive the positioning rod to contact with the groove, so that the box cover is fixed on the junction box. By pulling the buckle, the steel wire rope drives the positioning rod to move and makes the positioning rod disengage from the groove, thus opening the box cover to facilitate the installation and connection of circuits.

[0004] During the actual use of the prior art, during the use of the electric valve positioner, operators need to regularly check the connection status of the circuits to ensure the safety of circuit connection. Since operators need to open the entire box cover every time they check the circuits or perform connection operations on local circuits, fully opening the box cover will increase the complexity of the operation for operators and consume more time. Therefore, an electric valve positioner facilitating connection of circuits is proposed. Content of the Utility Model

[0005] 1. Technical Problem to be Solved

[0006] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide an electric valve positioner facilitating connection of circuits. By pulling the moving rod outwards to drive the limiting rod to move outwards to extrude the connection spring and leave the inner cavity of the convex rod, at this time the convex rod loses the fixed limit. Hold the convex rod to drive the observation window to flip open, exposing the maintenance port, which is convenient for operators to connect or reinforce the circuits. This operation is simple and labor-saving, and is applicable to situations where local simple circuit connection, maintenance, etc. are required. Compared with the traditional cumbersome operation of fully opening the entire box cover to perform circuit inspection and connection, it is more convenient and reduces the operation time.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present utility model adopts the following technical solution.

[0009] An electric valve positioner facilitating connection of circuits, comprising a valve positioner main body, on the outer surface of which a junction box is provided, on the upper surface of which a quick connection mechanism is provided, and inside the cavity of which an observation mechanism is provided; the quick connection mechanism includes a box cover movably connected to the upper surface of the junction box, an insertion rod is inserted through the inner cavity of the box cover, one end of the insertion rod is fixedly connected to a round handle, and a spring is sleeved on the outer surface of the insertion rod; the observation mechanism includes an observation window hinged to the inner cavity of the box cover, a convex rod is fixedly connected to the upper surface of the observation window, a limiting rod is inserted through the inner cavity of the convex rod, one end of the limiting rod is fixedly connected to a moving rod, and a connecting spring is sleeved on the outer surface of the moving rod.

[0010] Furthermore, a wiring terminal is provided at the bottom of the inner cavity of the junction box, and the observation window is made of a transparent material.

[0011] Furthermore, a plurality of raised blocks are provided on the upper surface of the box cover, and the raised blocks are integrally formed with the box cover.

[0012] Furthermore, a plurality of grooves are provided on the outer surface of the junction box, and the insertion rod and the spring both move within the grooves.

[0013] Furthermore, one end of the spring is fixedly connected to the round handle, and the other end of the spring away from the round handle is fixedly connected to the inner side wall of the junction box.

[0014] Furthermore, a supporting ring is fixedly connected to the inner cavity of the box cover, and the lower surface of the observation window abuts against the upper surface of the supporting ring.

[0015] Furthermore, the upper end of the convex rod is semi-circular in shape, the limiting rod moves within the inner cavity of the convex rod, and the outer surface of the moving rod is movably connected to the inner cavity of the box cover.

[0016] Furthermore, one end of the connecting spring is fixedly connected to the limiting rod, and the other end of the connecting spring away from the limiting rod is fixedly connected to the inner wall of the box cover.

[0017] 3. Advantageous Effects

[0018] Compared with the prior art, the advantages of the present utility model are as follows:

[0019] (1) This solution pulls the moving rod outward to drive the limit rod to move outward to squeeze the connection spring and leave the inner cavity of the protruding rod. At this time, the protruding rod loses its fixed limit. Holding the protruding rod drives the observation window to flip open, revealing the inspection port, which is convenient for operators to connect or reinforce the line. This operation is simple and convenient, and is suitable for local situations where simple line connection and maintenance are required. Compared with the traditional cumbersome operation of fully opening the entire box cover to check and connect the line, it is more convenient and reduces the operation time.

[0020] (2) This solution pulls the round handle outward to drive the rod and one end of the spring to move outward. When the rod moves outward and leaves the inner cavity of the box cover, the box cover loses its fixed limit and can be directly removed, which is convenient for operators to perform large-scale line replacement operations. Compared with the traditional bolt installation method, this connection method eliminates the cumbersome manual twisting operation and can quickly install and remove the box cover without the help of external tools, which is convenient for operators to quickly connect lines. This method is suitable for when all lines need to be reconnected or new wiring terminals need to be replaced.

[0021] (3) This solution can directly check the circuit connection status on the wiring terminals in the junction box through the observation window, so as to determine whether the circuit connection is correct. Compared with the traditional operation of opening the box cover to check, it is more intuitive and reduces tedious operations and time consumption. Brief Description of the Figures

[0022] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 is a schematic diagram of the partial structure of the utility model;

[0024] Figure 3 is a schematic diagram of the partial structure section of the utility model;

[0025] Figure 4 For the utility model Figure 3 -A enlarged structural diagram;

[0026] Figure 5 This is a schematic diagram of the partial structure of the utility model.

[0027] Description of the numbers in the figure:

[0028] 1. Valve positioner body; 2. Junction box; 201. Wiring terminal; 3. Quick connection mechanism; 301. Box cover; 302. Protrusion; 303. Groove; 304. Insert rod; 305. Round handle; 306. Spring; 4. Observation mechanism; 401. Observation window; 402. Support ring; 403. Protrusion; 404. Limit rod; 405. Moving rod; 406. Connecting spring. Detailed implementation mode

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model; obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work belong to the scope of protection of the present utility model.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is 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 cannot be understood as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; 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 communication inside two elements. 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 situations.

[0032] Embodiment 1:

[0033] Please refer to Figures 1-4 , which includes a valve positioner main body 1. A junction box 2 is arranged on the outer surface of the valve positioner main body 1. A quick connection mechanism 3 is arranged on the upper surface of the junction box 2, including a box cover 301 movably connected to the upper surface of the junction box 2. A plug rod 304 is inserted through the inner cavity of the box cover 301. One end of the plug rod 304 is fixedly connected with a round handle 305, and a spring 306 is sleeved on the outer surface of the plug rod 304;

[0034] Specifically, a terminal 201 is arranged at the bottom of the inner cavity of the junction box 2. A plurality of raised blocks 302 are arranged on the upper surface of the box cover 301. The raised blocks 302 are integrally formed with the box cover 301. A plurality of grooves 303 are formed on the outer surface of the junction box 2. The plug rod 304 and the spring 306 both move in the grooves 303. One end of the spring 306 is fixedly connected with the round handle 305, and the end of the spring 306 away from the round handle 305 is fixedly connected with the inner side wall of the junction box 2;

[0035] Furthermore, when all the circuits need to be reconnected or new terminal blocks are to be replaced, the position of the inspection opening is relatively small at this time, and the operation is restricted. The round handle 305 can be pulled outwards to drive one end of the insertion rod 304 and the spring 306 to move outwards. When the insertion rod 304 moves outwards and leaves the inner cavity of the box cover 301, the box cover 301 loses its fixed limit and can be directly removed, facilitating the operator to perform large-scale circuit replacement operations. Compared with the traditional bolt installation method, this connection method eliminates the cumbersome manual screwing operation and can achieve the quick installation and disassembly of the box cover 301 without the aid of external tools, facilitating the operator to quickly connect the circuits. This operation is applicable to large-scale circuit connection operations. Completely opening the box cover 301 can avoid restricted operation and facilitate the operator to better connect the circuits.

[0036] Embodiment 2:

[0037] Please refer to Figures 1-5 , which is the second embodiment of the present utility model. Based on the previous embodiment, an observation mechanism 4 is provided inside the cavity of the quick connection mechanism 3, including an observation window 401 hinged inside the box cover 301. A convex rod 403 is fixedly connected to the upper surface of the observation window 401. A limiting rod 404 is inserted through the inner cavity of the convex rod 403. One end of the limiting rod 404 is fixedly connected to a moving rod 405. A connecting spring 406 is sleeved on the outer surface of the moving rod 405. A supporting ring 402 is fixedly connected inside the box cover 301;

[0038] Specifically, the observation window 401 is made of a transparent material. The lower surface of the observation window 401 abuts against the upper surface of the supporting ring 402. The upper end of the convex rod 403 is semicircular. The limiting rod 404 moves inside the inner cavity of the convex rod 403. The outer surface of the moving rod 405 is movably connected to the inner cavity of the box cover 301. One end of the connecting spring 406 is fixedly connected to the limiting rod 404, and the end of the connecting spring 406 away from the limiting rod 404 is fixedly connected to the inner wall of the box cover 301;

[0039] Furthermore, the operator can check the circuit connection status on the terminal block 201 inside the junction box 2 in real time through the observation window 401. The observation window 401 is made of a transparent material such as transparent glass or transparent plastic, and the operator can choose according to the actual situation, so as to judge whether the circuit connection is correct. When a single circuit becomes loose or needs to be connected separately, at this time, the moving rod 405 is pulled outwards to drive the limiting rod 404 to move outwards, squeezing the connecting spring 406 and leaving the inner cavity of the convex rod 403. At this time, the convex rod 403 loses its fixed limit. Hold the convex rod 403 and drive the observation window 401 to flip open, exposing the inspection opening, facilitating the operator to connect or reinforce the circuit. This operation is simple and labor-saving, and is applicable to situations where local simple circuit connection, maintenance, etc. are required. The operator can make a reasonable choice according to the actual circuit connection requirements.

[0040] Working principle: During the use of the device, the operator can check the line connection status on the terminal 201 in the junction box 2 in real time through the observation window 401, so as to judge whether the line connection is correct. When a single circuit line becomes loose or needs to be connected separately, pull the moving rod 405 outwards at this time to drive the limit rod 404 to move outwards, squeeze the connecting spring 406 and leave the inner cavity of the convex rod 403. At this time, the convex rod 403 loses its fixed limit. Hold the convex rod 403 and drive the observation window 401 to flip open, revealing the maintenance port, which is convenient for the operator to connect or reinforce the line. This operation is simple and labor-saving, and is suitable for situations where simple line connection, maintenance, etc. are required locally. Compared with the traditional cumbersome operation of completely opening the entire box cover 301 to check and connect the line, it is more convenient and simple. When all the lines need to be reconnected or new terminals are replaced, the position of the maintenance port is relatively small at this time, and the operation is relatively restricted. The round handle 305 can be pulled outwards to drive the insertion rod 304 and one end of the spring 306 to move outwards. When the insertion rod 304 moves outwards and leaves the inner cavity of the box cover 301, the box cover 301 loses its fixed limit and can be directly removed, which is convenient for the operator to perform large-scale line replacement operations. Compared with the traditional bolt installation method, this connection method eliminates the cumbersome manual screwing operation and can complete the quick installation and disassembly operation of the box cover 301 without the aid of external tools, which is convenient for the operator to quickly connect the line.

[0041] The above is only the preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An electric valve positioner that is easy to connect to a circuit, comprising a valve positioner body (1), characterized in that: The outer surface of the valve positioner body (1) is provided with a junction box (2), the upper surface of the junction box (2) is provided with a quick connection mechanism (3), and the inner cavity of the quick connection mechanism (3) is provided with an observation mechanism (4); The quick connection mechanism (3) comprises a box cover (301) movably connected to the upper surface of the junction box (2), a plug rod (304) is inserted into the inner cavity of the box cover (301), a round handle (305) is fixedly connected to one end of the plug rod (304), and a spring (306) is sleeved on the outer surface of the plug rod (304); The observation mechanism (4) comprises an observation window (401) hinged on the inner cavity of the box cover (301), the upper surface of the observation window (401) is fixedly connected with a protruding rod (403), the inner cavity of the protruding rod (403) is penetrated by a limiting rod (404), one end of the limiting rod (404) is fixedly connected with a moving rod (405), and the outer surface of the moving rod (405) is sleeved with a connecting spring (406).

2. The electric valve positioner that is easy to connect lines according to claim 1 is characterized in that: A wiring terminal (201) is arranged at the bottom of the inner cavity of the junction box (2), and the observation window (401) is made of a transparent material.

3. The electric valve positioner that is easy to connect lines according to claim 1 is characterized in that: A plurality of protruding blocks (302) are provided on the upper surface of the box cover (301), and the protruding blocks (302) and the box cover (301) are integrally formed.

4. The electric valve positioner that is easy to connect lines according to claim 1 is characterized in that: The outer surface of the junction box (2) is provided with a plurality of grooves (303), and the insertion rod (304) and the spring (306) both move in the grooves (303).

5. The electric valve positioner that is easy to connect lines according to claim 1 is characterized in that: One end of the spring (306) is fixedly connected to the round handle (305), and one end of the spring (306) away from the round handle (305) is fixedly connected to the inner wall of the junction box (2).

6. The electric valve positioner that is easy to connect lines according to claim 1, characterized in that: A supporting ring (402) is fixedly connected to the inner cavity of the box cover (301), and the lower surface of the observation window (401) abuts against the upper surface of the supporting ring (402).

7. The electric valve positioner that is easy to connect lines according to claim 1, characterized in that: The upper end of the protruding rod (403) is semicircular in shape, the limiting rod (404) moves in the inner cavity of the protruding rod (403), and the outer surface of the moving rod (405) is movably connected to the inner cavity of the box cover (301).

8. The electric valve positioner that is easy to connect lines according to claim 1, characterized in that: One end of the connecting spring (406) is fixedly connected to the limiting rod (404), and one end of the connecting spring (406) away from the limiting rod (404) is fixedly connected to the inner wall of the box cover (301).

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