Position sensor for explosion-proof electric actuator

Abstract

The utility model discloses a kind of position sensors for explosion-proof electric actuator, it is related to position sensor technical field, including explosion-proof casing, position sensor main body and the electric actuator main body installed on explosion-proof casing, further include: the adjusting unit and positioning unit between being arranged in explosion-proof casing and position sensor main body;Adjusting unit includes strip box, screw rod, supporting block, support sleeve and strip cover, two strip boxes are symmetrically fixed and set on the outer wall of opposite sides of explosion-proof casing;Positioning unit includes group joint block, support strip, support spring, knob and insert rod, group joint block is fixedly arranged at the center of strip cover side and extends into explosion-proof casing by strip gap.This utility model, strip cover plate drives positioning unit and position sensor main body to enter and exit explosion-proof casing by strip gap, and equipment is mobilized in and outside explosion-proof casing to position sensor main body, and it is simple and flexible to operate.

Description

Technical Field

[0001] This utility model relates to the field of position sensor technology, and in particular to a position sensor for an explosion-proof electric actuator. Background Technology

[0002] An electric actuator is a drive device that provides linear or rotary motion. It utilizes a driving energy source and operates under the action of a control signal. The actuator uses liquid, gas, electricity, or other energy sources and converts them into driving force through a motor, cylinder, or other device. Electric actuators internally incorporate position sensors, torque sensors, electrode protection devices, logic control devices, digital communication modules, and PID control modules, all enclosed in a compact housing.

[0003] Publication number CN202302211U discloses a position sensing system for an electric actuator. The system includes a position sensor and a processor. The signal output terminal of the position sensor is electrically connected to the signal input terminal of the processor, and the control signal output terminal of the processor is electrically connected to the control signal input terminal of a frequency converter driver. The position sensor includes a Hall sensor and a potentiometer, used to obtain the rotation angle signals of the motor shaft and the output shaft, respectively. The position sensor and processor are housed within an intrinsically safe explosion-proof enclosure. This invention combines the advantages of both a Hall sensor and a potentiometer, complementing their respective disadvantages. When powered externally, the Hall sensor collects the position signal; when no external power is available, the potentiometer collects the position signal. This eliminates the need for battery power and improves the accuracy of valve positioning.

[0004] While the above solutions can improve the accuracy of position signal acquisition on electric actuators, the position sensor is located inside an explosion-proof enclosure, making it difficult to disassemble and maintain independently. Therefore, we propose an explosion-proof position sensor for electric actuators. Utility Model Content

[0005] The main purpose of this utility model is to provide a position sensor for an explosion-proof electric actuator. By setting an adjustment unit and a positioning unit, it solves the problem of the difficulty of disassembling and maintaining the position sensor separately when it is located inside the explosion-proof housing.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: a position sensor for an explosion-proof electric actuator, comprising an explosion-proof housing, a position sensor body and an electric actuator body mounted on the explosion-proof housing, and further comprising: an adjustment unit and a positioning unit disposed between the explosion-proof housing and the position sensor body;

[0007] The adjustment unit includes a strip box, a lead screw, a support block, a support sleeve, and a strip cover plate. Two strip boxes are symmetrically fixed on opposite outer walls of the explosion-proof housing. The lead screw is mounted on one of the strip boxes via a bearing. Two support blocks are provided and located inside the two strip boxes respectively. One support block is threadedly connected to the lead screw. Two support sleeves are fixed on the end faces of the two support blocks respectively. The strip cover plate is fixed on the end faces of the two support sleeves extending to the outside of the strip box. A strip notch is provided on the surface of the explosion-proof housing near the strip cover plate.

[0008] The positioning unit includes a connecting block, a support bar, a support spring, a toggle block, and a plug rod. The connecting block is fixedly disposed at the center of the side of the strip-shaped cover plate and extends into the explosion-proof housing through a strip-shaped notch. A positioning groove is provided at the center of the side of the connecting block. The support bar is placed on the positioning groove. The position sensor body is installed on the end face of the support bar. Two strip-shaped grooves are symmetrically provided on the side of the connecting block, and the strip-shaped grooves are connected to the positioning groove. The two support springs are respectively fixedly disposed in the two strip-shaped grooves. The toggle block is fixedly disposed on the end face of the support spring. Positioning holes are provided at both ends of the support bar. The plug rod is embedded in the side of the toggle block, with one end extending movably into the positioning hole, and the other end of the plug rod located inside the support spring.

[0009] Preferably, the adjustment unit further includes a guide rod, which is fixedly mounted on another strip box and movably passes through another support block.

[0010] Preferably, a turntable is fixedly installed on the end face of the lead screw located outside the strip box.

[0011] Preferably, the actuating block and the insert rod are arranged in a one-to-one correspondence with the strip groove.

[0012] Preferably, the support spring and the lead screw are arranged perpendicular to each other.

[0013] Preferably, mounting holes are provided at the corners of the bottom surface of the explosion-proof housing.

[0014] Compared with the prior art, the position sensor for an explosion-proof electric actuator of this utility model has the following advantages:

[0015] 1. In this utility model, by setting an adjustment unit, after the position sensor body is assembled onto the strip cover plate through the positioning unit, by holding and rotating the screw in both directions outside the strip box, one of the support blocks connected to the screw threadedly can be driven by the force to move the support sleeve on the strip box to adjust the exposed area. The strip cover plate then drives the positioning unit and the position sensor body to enter and exit the explosion-proof housing through the strip notch. The other support block can slide and move on the guide rod to cooperate with the adjustment of the support sleeve and the strip cover plate and provide auxiliary support for them. The equipment makes it simple and flexible to adjust the position sensor body inside and outside the explosion-proof housing.

[0016] 2. In this utility model, by setting a positioning unit, the assembly block fixedly set at the center of the side of the strip cover plate can move in and out of the strip notch. By pulling open the two actuating blocks in the two strip grooves, the support spring is compressed in the strip groove. The insert rod embedded in the side of the actuating block moves into the strip groove. The support bar is unobstructed and can be placed in the positioning groove at the center of the side of the assembly block. After releasing the actuating block, the support spring returns to its original shape and can drive the insert rod into the positioning groove and insert it into the positioning hole at the end face of the support bar. The position sensor body is limited and assembled onto the assembly block along with the support bar. The equipment allows for simple and flexible disassembly and assembly of the position sensor body. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a position sensor for an explosion-proof electric actuator according to this utility model;

[0019] Figure 2 This is a top view schematic diagram of the position sensor for an explosion-proof electric actuator according to this utility model;

[0020] Figure 3 This utility model Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0021] Figure 4 This utility model Figure 2 Schematic diagram of the cross-sectional structure at point BB;

[0022] Figure 5 This is a side view of the position sensor for an explosion-proof electric actuator according to the present invention.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Explosion-proof enclosure;

[0025] 2. Adjustment unit; 201. Strip box; 202. Lead screw; 203. Support block; 204. Support sleeve; 205. Strip cover plate; 206. Guide rod;

[0026] 3. Positioning unit; 301. Assembly block; 302. Support bar; 303. Support spring; 304. Actuating block; 305. Insert rod;

[0027] 4. Position sensor body;

[0028] 5. Main body of the electric actuator;

[0029] 6. Turntable. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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 a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0033] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4As shown, a position sensor for an explosion-proof electric actuator includes an explosion-proof housing 1, a position sensor body 4, and an electric actuator body 5 mounted on the explosion-proof housing 1. It also includes an adjustment unit 2 and a positioning unit 3 disposed between the explosion-proof housing 1 and the position sensor body 4.

[0034] The adjustment unit 2 includes a strip box 201, a lead screw 202, a support block 203, a support sleeve 204, and a strip cover plate 205. Two strip boxes 201 are symmetrically fixed on the outer walls of opposite sides of the explosion-proof housing 1. The lead screw 202 is embedded in one of the strip boxes 201 through a bearing. There are two support blocks 203, which are located in the two strip boxes 201 respectively. One of the support blocks 203 is threadedly connected to the lead screw 202. Two support sleeves 204 are fixedly fixed on the end faces of the two support blocks 203 respectively. The strip cover plate 205 is fixedly fixed on the end faces of the two support sleeves 204 extending to the outside of the strip box 201. A strip notch is opened on the side surface of the explosion-proof housing 1 near the strip cover plate 205.

[0035] The positioning unit 3 includes a connecting block 301, a support bar 302, a support spring 303, a toggle block 304, and a plug rod 305. The connecting block 301 is fixedly installed at the center of the side of the strip cover plate 205 and extends into the explosion-proof housing 1 through a strip notch. A positioning groove is provided at the center of the side of the connecting block 301. The support bar 302 is placed on the positioning groove. The position sensor body 4 is installed on the end face of the support bar 302. Two strip grooves are symmetrically provided on the side of the connecting block 301, and the strip grooves are connected to the positioning groove. Two support springs 303 are fixedly installed in the two strip grooves respectively. The toggle block 304 is fixedly installed on the end face of the support spring 303. Positioning holes are provided at both ends of the support bar 302. The plug rod 305 is embedded in the side of the toggle block 304 and one end extends movably into the positioning hole. The other end of the plug rod 305 is located inside the support spring 303.

[0036] Furthermore, the adjustment unit 2 also includes a guide rod 206, which is fixedly mounted on another strip box 201 and moves through another support block 203.

[0037] Furthermore, a turntable 6 is fixedly installed on the end face of the lead screw 202 located outside the strip box 201.

[0038] Furthermore, mounting holes are provided at the corners of the bottom surface of the explosion-proof housing 1.

[0039] The adjustment unit 2 makes it easy and flexible to move the position sensor body 4 inside and outside the explosion-proof housing 1. Example

[0040] like Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As shown, a position sensor for an explosion-proof electric actuator includes an explosion-proof housing 1, a position sensor body 4, and an electric actuator body 5 mounted on the explosion-proof housing 1. It also includes an adjustment unit 2 and a positioning unit 3 disposed between the explosion-proof housing 1 and the position sensor body 4.

[0041] The adjustment unit 2 includes a strip box 201, a lead screw 202, a support block 203, a support sleeve 204, and a strip cover plate 205. Two strip boxes 201 are symmetrically fixed on the outer walls of opposite sides of the explosion-proof housing 1. The lead screw 202 is embedded in one of the strip boxes 201 through a bearing. There are two support blocks 203, which are located in the two strip boxes 201 respectively. One of the support blocks 203 is threadedly connected to the lead screw 202. Two support sleeves 204 are fixedly fixed on the end faces of the two support blocks 203 respectively. The strip cover plate 205 is fixedly fixed on the end faces of the two support sleeves 204 extending to the outside of the strip box 201. A strip notch is opened on the side surface of the explosion-proof housing 1 near the strip cover plate 205.

[0042] The positioning unit 3 includes a connecting block 301, a support bar 302, a support spring 303, a toggle block 304, and a plug rod 305. The connecting block 301 is fixedly installed at the center of the side of the strip cover plate 205 and extends into the explosion-proof housing 1 through a strip notch. A positioning groove is provided at the center of the side of the connecting block 301. The support bar 302 is placed on the positioning groove. The position sensor body 4 is installed on the end face of the support bar 302. Two strip grooves are symmetrically provided on the side of the connecting block 301, and the strip grooves are connected to the positioning groove. Two support springs 303 are fixedly installed in the two strip grooves respectively. The toggle block 304 is fixedly installed on the end face of the support spring 303. Positioning holes are provided at both ends of the support bar 302. The plug rod 305 is embedded in the side of the toggle block 304 and one end extends movably into the positioning hole. The other end of the plug rod 305 is located inside the support spring 303.

[0043] Furthermore, the adjustment unit 2 also includes a guide rod 206, which is fixedly mounted on another strip box 201 and moves through another support block 203.

[0044] Furthermore, the actuating block 304 and the insert rod 305 are arranged in a one-to-one correspondence with the strip groove.

[0045] Furthermore, the support spring 303 and the lead screw 202 are arranged perpendicular to each other.

[0046] Furthermore, mounting holes are provided at the corners of the bottom surface of the explosion-proof housing 1.

[0047] The positioning unit 3 makes it easy and flexible to disassemble and assemble the position sensor body 4 separately.

[0048] The working principle of this utility model is as follows:

[0049] The connecting block 301, fixedly positioned at the center of the side of the strip-shaped cover plate 205, moves in and out of the strip-shaped notch. By pulling open the two actuating blocks 304 within the two strip-shaped grooves, the support spring 303 is compressed within the grooves. The insert rod 305, embedded on the side of the actuating block 304, moves into the groove, and the support strip 302, no longer obstructed, is placed into the positioning groove at the center of the side of the connecting block 301. After releasing the actuating block 304, the support spring 303 deforms and returns to its original position, causing the insert rod 305 to enter the positioning groove and insert into the positioning hole on the end face of the support strip 302. The sensor body 4 is assembled onto the assembly block 301 along with the support bar 302. It holds and rotates the screw 202 in both directions outside the strip box 201. One of the support blocks 203, which is threaded to the screw 202, is driven by the force to move the support sleeve 204 on the strip box 201 to adjust the exposed area. The strip cover plate 205 then moves the positioning unit 3 and the position sensor body 4 through the strip notch to enter and exit the explosion-proof housing 1. The other support block 203 slides and moves on the guide rod 206 to cooperate with the adjustment of the support sleeve 204 and the strip cover plate 205 and to provide auxiliary support for them.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A position sensor for an explosion-proof electric actuator, comprising an explosion-proof housing (1), a position sensor body (4), and an electric actuator body (5) mounted on the explosion-proof housing (1), characterized in that, Also includes: An adjustment unit (2) and a positioning unit (3) are disposed between the explosion-proof housing (1) and the position sensor body (4); The adjustment unit (2) includes a strip box (201), a lead screw (202), a support block (203), a support sleeve (204), and a strip cover plate (205). The two strip boxes (201) are symmetrically fixed on the outer walls of opposite sides of the explosion-proof housing (1). The lead screw (202) is installed on one of the strip boxes (201) by bearing. There are two support blocks (203) and they are located in the two strip boxes (201) respectively. One of the support blocks (203) is threadedly connected to the lead screw (202). The two support sleeves (204) are fixed on the end faces of the two support blocks (203) respectively. The strip cover plate (205) is fixed on the end faces of the two support sleeves (204) extending to the outside of the strip box (201). The explosion-proof housing (1) has a strip notch on the side surface near the strip cover plate (205). The positioning unit (3) includes a connecting block (301), a support bar (302), a support spring (303), a toggle block (304), and a plug rod (305). The connecting block (301) is fixedly installed at the center of the side of the strip cover plate (205) and extends into the explosion-proof housing (1) through a strip notch. A positioning groove is provided at the center of the side of the connecting block (301). The support bar (302) is placed on the positioning groove. The position sensor body (4) is installed on the end face of the support bar (302). The assembly block (301) has two symmetrical strip grooves on its side, and the strip grooves are connected to the positioning grooves. The two support springs (303) are respectively fixed in the two strip grooves. The actuating block (304) is fixed in the end face of the support spring (303). The support bar (302) has positioning holes at both ends. The insert rod (305) is embedded in the side of the actuating block (304) and one end of it extends movably into the positioning hole. The other end of the insert rod (305) is located inside the support spring (303).

2. The position sensor for an explosion-proof electric actuator according to claim 1, characterized in that: The adjustment unit (2) also includes a guide rod (206), which is fixedly mounted on another strip box (201) and moves through another support block (203).

3. The position sensor for an explosion-proof electric actuator according to claim 1, characterized in that: A turntable (6) is fixedly installed on the end face of the lead screw (202) located outside the strip box (201).

4. The position sensor for an explosion-proof electric actuator according to claim 1, characterized in that: The actuating block (304) and the insert rod (305) are arranged in a one-to-one correspondence with the strip groove.

5. The position sensor for an explosion-proof electric actuator according to claim 1, characterized in that: The support spring (303) and the lead screw (202) are arranged perpendicular to each other.

6. The position sensor for an explosion-proof electric actuator according to claim 1, characterized in that: The explosion-proof housing (1) has mounting holes at the corners of its bottom surface.

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