Explosion-proof electrical instrument

Abstract

The utility model discloses an explosion-proof electrical instrument which comprises an electrical instrument body, a cable is arranged on the top surface of the electrical instrument body in an extending mode, an explosion-proof pipe is arranged on the outer side of the cable, and a quick connection mechanism is arranged between the bottom end of the explosion-proof pipe and the electrical instrument body. The quick connection mechanism comprises a clamping sleeve, a clamping pipe, a movable hole, a clamping block, a clamping groove, a control sleeve, a rotating sleeve and a protruding block, the clamping sleeve is fixed to the bottom end of the explosion-proof pipe, the clamping pipe is fixed to the top face of the electrical instrument body, and the quick connection mechanism of the explosion-proof electrical instrument is matched with the clamping pipe in an inserted mode through the clamping sleeve and the clamping pipe and is combined with the slidable clamping block and the tension spring structure; the explosion-proof pipe is quickly disassembled and assembled, the problem that a traditional integrated explosion-proof pipe is difficult to overhaul is solved, the explosion-proof safety is kept, and the maintenance convenience is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrical instrument, more specifically, it relates to an explosion -proof electrical instrument. BACKGROUND

[0002] In the flammable and explosive environment such as petroleum chemical industry, natural gas, coal mine, electrical instrument is usually connected with external equipment through cable to ensure signal transmission and power supply safety, since such place exists explosion risk, traditional protection mode usually adopts explosion -proof tube to concentrate the cable and is bunched up to insulate the damage of spark, high temperature or corrosive medium to cable, explosion -proof tube usually adopts integrated design, cannot be split flexibly, lead to when later maintenance or cable replacement, must whole dismount explosion -proof tube, not only operation is tedious, also can destroy original sealing property and explosion -proof performance;

[0003] In the long -term operation process of electrical instrument, cable can appear aging, short circuit or signal interference etc., need regular maintenance or replacement, but the non - detachable characteristic of traditional explosion -proof tube makes that maintenance path is blocked by pipe wall, and technician cannot directly touch internal cable, if forcibly remove explosion -proof tube, not only increase workload, also can cause sealing failure due to repeated dismounting, influence explosion -proof safety;If do not remove, then maintenance efficiency is greatly reduced, even can miss hidden danger due to limited operation space, this contradiction seriously restricts the maintenance convenience and long -term reliability of explosion -proof electrical instrument. UTILITY MODEL CONTENTS

[0004] (I) technical problem solved

[0005] In view of the problems in the prior art, the utility model provides an explosion -proof electrical instrument to solve the technical problems mentioned in the background art.

[0006] (II) technical scheme

[0007] In order to achieve the above object, the utility model provides the following technical scheme: an explosion -proof electrical instrument, including electrical instrument body, the top surface of electrical instrument body extends and is equipped with cable, the outer side of cable is equipped with explosion -proof tube, the bottom end between explosion -proof tube and electrical instrument body is provided with quick -coupling mechanism, the quick -coupling mechanism includes clamping sleeve, clamping pipe, movable hole, clamping block, clamping groove, control sleeve, rotating sleeve and lug, clamping sleeve is fixed in the bottom end of explosion -proof tube, clamping pipe is fixed on the top surface of electrical instrument body, movable hole is provided with multiple groups and is distributed on the outer wall of fixed sleeve, clamping block slides in multiple groups movable holes, clamping groove is provided with multiple groups and is distributed on the outer wall of clamping pipe, control sleeve is provided with multiple groups and moves on the outer wall of clamping sleeve, rotating sleeve rotates on the outer wall of clamping sleeve, lug is provided with multiple groups and is distributed on the top surface of rotating sleeve.

[0008] The utility model further provides for, the inner wall of carding sleeve is equipped with positioning strip, the outer wall of carding pipe is equipped with positioning groove, positioning strip and positioning groove all are equipped with multiple and sliding connection, realize quick accurate alignment installation.

[0009] The utility model further provides for, the top of carding sleeve is equipped with soft pad, enhances sealing performance and buffers connection impact.

[0010] The utility model further provides for, multiple carding block insides all are connected with tension spring, ensure that carding block automatic reset and keep stable carding.

[0011] The utility model further provides for, multiple tension spring bottom ends all are fixed with connecting block, multiple connecting block inner walls all are fixed with guide block, the outer wall of carding sleeve is equipped with guide groove, guide groove is equipped with multiple and is connected with multiple guide block sliding respectively, guarantee carding block movement track accurate.

[0012] The utility model further provides for, multiple control sleeve outer walls all are equipped with arc slot, control carding block sliding and realize quick locking or unlocking.

[0013] The utility model further provides for, multiple control sleeve outer walls all are equipped with outer ring, multiple carding block insides all are equipped with inner groove, multiple inner grooves are connected with multiple outer rings sliding respectively, ensure that control sleeve and carding block linkage reliable.

[0014] The utility model further provides for, the outer wall of carding sleeve is fixed with abutting sleeve, the outer wall of abutting sleeve is equipped with multiple and is equipped with abutting groove, provides additional locking point and enhances the stability of connection, multiple connecting block outer sides all are fixed with limiting rod and are connected with carding block sliding.

[0015] (Three) beneficial effects

[0016] Compared with the prior art, the utility model provides a kind of explosion-proof electrical instrument, with following beneficial effects:

[0017] 1, the quick coupling mechanism of the explosion-proof electrical instrument is inserted into the cooperation of carding sleeve and carding pipe, in combination with the structure of slidable carding block and tension spring, the quick disassembly of explosion-proof pipe is realized, the problem of traditional integrated explosion-proof pipe maintenance difficulty is solved, explosion-proof safety is retained, and maintenance convenience is significantly improved.

[0018] 2, control sleeve is cooperated with arc slot by outer ring, drives carding block to move accurately along movable hole when rotating, ensure the reliability of carding, prevent misoperation by limiting structure, so that disassembly process is more controllable.

[0019] 3. The combination design of the abutment sleeve and the soft pad forms a buffer seal when snapped together, which not only reduces the impact of mechanical impact on the cable, but also enhances the explosion-proof performance of the connection. At the same time, the elastic deformation of the soft pad further improves the sealing effect and effectively prevents the penetration of explosive gases. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an explosion-proof electrical instrument according to the present invention;

[0021] Figure 2 This is a cross-sectional view of the quick-connect mechanism in this utility model.

[0022] Figure 3 This is a cross-sectional view of the control sleeve in this utility model;

[0023] Figure 4 This is a cross-sectional view of the guide groove in this utility model;

[0024] Figure 5 This is a cross-sectional view of the snap-fit ​​sleeve in this utility model.

[0025] In the diagram: 1. Electrical instrument body; 2. Cable; 3. Explosion-proof pipe; 4. Snap-fit ​​sleeve; 5. Snap-fit ​​pipe; 6. Movable hole; 7. Snap-fit ​​block; 8. Snap-fit ​​groove; 9. Control sleeve; 10. Rotating sleeve; 11. Protrusion; 12. Positioning strip; 13. Positioning groove; 14. Soft pad; 15. Tension spring; 16. Connecting block; 17. Guide block; 18. Guide groove; 19. Arc groove; 20. Outer ring; 21. Inner groove; 22. Abutment sleeve; 23. Abutment groove; 24. Limiting rod. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Please see Figures 1-5The utility model provides an explosion -proof electrical instrument, including electrical instrument body 1, the top surface of electrical instrument body 1 extends and is equipped with cable 2, the outside of cable 2 is equipped with explosion -proof pipe 3, and the bottom end between electrical instrument body 1 and explosion -proof pipe 3 is provided with quick -connect mechanism, and quick -connect mechanism includes clamping sleeve 4, clamping pipe 5, movable hole 6, clamping block 7, clamping groove 8, control sleeve 9, rotating sleeve 10 and lug 11, clamping sleeve 4 is fixed at the bottom end of explosion -proof pipe 3, clamping pipe 5 is fixed at the top surface of electrical instrument body 1, movable hole 6 is provided with multiple groups and is distributed in the fixed sleeve outer wall, clamping block 7 slides in multiple movable hole 6, clamping groove 8 is provided with multiple groups and is distributed in the outer wall of clamping pipe 5, control sleeve 9 is provided with multiple groups and moves in the outer wall of clamping sleeve 4, rotating sleeve 10 rotates in the outer wall of clamping sleeve 4, and lug 11 is provided with multiple groups and is distributed in the top surface of rotating sleeve 10.

[0030] The inner wall of clamping sleeve 4 is provided with positioning strip 12, the outer wall of clamping pipe 5 is provided with positioning groove 13, and the positioning strip 12 and the positioning groove 13 are slidably connected, so that the clamping sleeve 4 and the clamping pipe 5 are quickly and accurately positioned and installed.

[0031] The top end of clamping sleeve 4 is provided with soft pad 14, which provides buffering and sealing effect during connection, to prevent external medium from penetrating.

[0032] The inner side of the plurality of clamping blocks 7 is connected with a plurality of tension springs 15, the plurality of tension springs 15 provides a restoring force for the clamping blocks 7, and ensures that the clamping blocks 7 always have a tendency to be clamped inward.

[0033] The bottom end of the plurality of tension springs 15 is fixedly provided with a plurality of connecting blocks 16, the inner wall of the plurality of connecting blocks 16 is fixedly provided with a plurality of guide blocks 17, the outer wall of the clamping sleeve 4 is provided with a plurality of guide grooves 18, the plurality of guide grooves 18 are slidably connected with the plurality of guide blocks 17 respectively, and the guide blocks 17 slide along the guide grooves 18 to limit the movement track of the clamping blocks 7.

[0034] The outer wall of the plurality of control sleeves 9 is provided with a plurality of arc grooves 19, the plurality of arc grooves 19 provides a sliding space for the clamping blocks 7, and realizes the radial movement of the clamping blocks 7.

[0035] The outer wall of the plurality of control sleeves 9 is provided with a plurality of outer rings 20, the inner side of the plurality of clamping blocks 7 is provided with a plurality of inner grooves 21, the plurality of inner grooves 21 are slidably connected with the plurality of outer rings 20 respectively, and the outer ring 20 and the inner groove 21 are matched to realize the driving of the clamping blocks 7 by the control sleeve 9.

[0036] The outer wall of the clamping sleeve 4 is fixedly provided with an abutting sleeve 22, the abutting sleeve 22 is provided with a plurality of abutting grooves 23, the outer side of the plurality of connecting blocks 16 is fixedly provided with a plurality of limiting rods 24 and is slidably connected with the clamping blocks 7, the abutting groove 23 provides a final locking position for the clamping blocks 7, and ensures that the connection is stable.

[0037] In the embodiment, when the explosion-proof pipe 3 needs to be connected, the clamping sleeve 4 and the clamping pipe 5 are inserted through positioning of the plurality of positioning grooves 13 and the positioning strips 12, and at the same time, the plurality of control sleeves 9 are rotated to make the plurality of clamping blocks 7 slide into the arc-shaped grooves 19, the plurality of pull springs 15 are pulled to make the plurality of clamping blocks 7 clamped in the plurality of clamping grooves 8, respectively, the rotating sleeve 10 is rotated to make the plurality of protrusions 11 push the plurality of clamping blocks 7 to slide along the movable holes 6, respectively, the plurality of limiting rods 24 drive the guide blocks 17 to slide along the guide grooves 18, the plurality of clamping blocks 7 push the clamping pipe 5 to extrude the soft pad 14, and the plurality of clamping blocks 7 are clamped in the plurality of abutting grooves 23, respectively, to be locked, so that the explosion-proof pipe 3 is quickly connected.

[0038] More specifically, when the explosion-proof pipe 3 needs to be disassembled, the rotating sleeve 10 is rotated to remove the abutment of the plurality of protrusions 11 on the clamping blocks 7, so as to remove the pushing of the plurality of clamping blocks 7 on the clamping pipe 5, the plurality of control sleeves 9 are pulled to drive the clamping blocks 7 to slide along the movable holes 6 to be separated from the abutting grooves 23, and at the same time, the plurality of control sleeves 9 are rotated to make the plurality of clamping blocks 7 separated from the arc-shaped grooves 19, so that the plurality of clamping blocks 7 are separated from the clamping grooves 8 and stretch the plurality of pull springs 15, and then the explosion-proof pipe 3 can be disassembled.

[0039] In summary, when the explosion-proof pipe 3 needs to be connected, the clamping sleeve 4 and the clamping pipe 5 are inserted through positioning of the plurality of positioning grooves 13 and the positioning strips 12, and at the same time, the plurality of control sleeves 9 are rotated to make the plurality of clamping blocks 7 slide into the arc-shaped grooves 19, the plurality of pull springs 15 are pulled to make the plurality of clamping blocks 7 clamped in the plurality of clamping grooves 8, respectively, the rotating sleeve 10 is rotated to make the plurality of protrusions 11 push the plurality of clamping blocks 7 to slide along the movable holes 6, respectively, the plurality of limiting rods 24 drive the guide blocks 17 to slide along the guide grooves 18, the plurality of clamping blocks 7 push the clamping pipe 5 to extrude the soft pad 14, and the plurality of clamping blocks 7 are clamped in the plurality of abutting grooves 23, respectively, to be locked, so that the explosion-proof pipe 3 is quickly connected.

[0040] When the explosion-proof pipe 3 needs to be disassembled, the rotating sleeve 10 is rotated to remove the abutment of the plurality of protrusions 11 on the clamping blocks 7, so as to remove the pushing of the plurality of clamping blocks 7 on the clamping pipe 5, the plurality of control sleeves 9 are pulled to drive the clamping blocks 7 to slide along the movable holes 6 to be separated from the abutting grooves 23, and at the same time, the plurality of control sleeves 9 are rotated to make the plurality of clamping blocks 7 separated from the arc-shaped grooves 19, so that the plurality of clamping blocks 7 are separated from the clamping grooves 8 and stretch the plurality of pull springs 15, and then the explosion-proof pipe 3 can be disassembled.

[0041] In all the above-mentioned solutions, the connection between the two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection or other known connection mode, which will not be described here. In the above, whenever there is a fixed connection, welding is preferred. Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof electrical instrument comprising an electrical instrument body (1), characterized by: The electric instrument body (1) top surface extends out and is provided with a cable (2), the cable (2) is provided with an explosion-proof tube (3) outside, the explosion-proof tube (3) bottom end and electric instrument body (1) between setting up quick -joint mechanism, the quick -joint mechanism includes clamping sleeve (4), clamping pipe (5), movable hole (6), clamping block (7), clamping groove (8), control sleeve (9), rotating sleeve (10) and lug (11), clamping sleeve (4) is fixed in the explosion-proof tube (3) bottom end, clamping pipe (5) is fixed on the top surface of electric instrument body (1), movable hole (6) is provided with multiple groups and is distributed in the fixed sleeve outer wall, clamping block (7) slides in multiple movable hole (6), clamping groove (8) is provided with multiple groups and is distributed in the outer wall of clamping pipe (5), control sleeve (9) is provided with multiple groups and is active in the outer wall of clamping sleeve (4), rotating sleeve (10) rotates in the outer wall of clamping sleeve (4), lug (11) is provided with multiple groups and is distributed in the top surface of rotating sleeve (10).

2. An explosion-proof electrical instrument according to claim 1, characterized in that: The inner wall of the clamping sleeve (4) is provided with a positioning strip (12), and the outer wall of the clamping pipe (5) is provided with a positioning groove (13), the positioning strip (12) and the positioning groove (13) are provided with multiple groups and are connected slidingly.

3. An explosion-proof electrical instrument according to claim 2, characterized in that: The top end of the clamping sleeve (4) is provided with a soft pad (14).

4. An explosion-proof electrical instrument according to claim 3, characterized in that: Multiple groups of the clamping block (7) are connected with a tension spring (15) on the inner side.

5. An explosion-proof electrical instrument according to claim 4, characterized in that: multiple sets The bottom end of the tension spring (15) is fixedly provided with a connecting block (16), and the inner wall of the connecting block (16) is fixedly provided with a guide block (17).

6. An explosion-proof electrical instrument according to claim 5, characterized in that: Multiple groups of the control sleeve (9) are provided with an arc-shaped groove (19) on the outer wall.

7. An explosion-proof electrical instrument according to claim 6, characterized in that: multiple sets The outer wall of the control sleeve (9) is provided with an outer ring (20), and the inner side of the clamping block (7) is provided with an inner groove (21).

8. An explosion-proof electrical instrument according to claim 7, characterized in that: The outer wall of the clamping sleeve (4) is fixedly provided with an abutting sleeve (22), which is provided with multiple groups and is provided with an abutting groove (23) on the outer wall, and the outer side of the connecting block (16) is fixedly provided with a limiting rod (24) and is connected with the clamping block (7) slidingly.

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