Protection equipment of mine hoist

Abstract

The utility model relates to the technical field of mine hoists, and discloses a mine hoist protection device which comprises a second shell, the outer wall of the second shell is fixedly connected with a fixing rod, the outer wall of the fixing rod is fixedly connected with a fixing block, a sliding groove is formed in the fixing block, and the inner wall of the sliding groove is slidably connected with a sliding block. A positioning block is fixedly connected to the outer wall of the sliding block, a connecting ring is slidably connected to the outer wall of the second shell, a first shell is fixedly connected to the side, away from the second shell, of the connecting ring, a mounting block is fixedly connected to the interior of the first shell, a screw is in threaded connection with the interior of the mounting block, and a silencing pad is in threaded connection with the outer wall of the screw. According to the utility model, through the special structural design of the second mute groove and the first mute groove, the vibration energy is consumed, the generation of noise is inhibited, the tight and uniform contact between the brake component and the shaft is ensured through self-adaptive positioning, the collision and uneven friction caused by poor contact during braking are avoided, and the noise generated by collision is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to mine hoist technical field especially relates to a protection device of mine hoist. BACKGROUND

[0002] In the production operation environment of coal mine, the electromechanical equipment such as belt conveyor, coal feeder, main shaft hoist and winch is the core equipment to guarantee the smooth operation of coal mining, transportation and material lifting. And as the key guarantee component for the safe and stable operation of these equipment, the performance of the brake directly relates to the reliability and safety of the whole production system. Especially the positioning device in the brake, it plays an indispensable role in ensuring the effective braking between the brake component and the equipment shaft.

[0003] The existing protection device is fixed in design, and the flexibility and adaptive ability are low, so it is difficult to accurately adjust and position according to the shafts of different sizes and shapes. This problem may cause the brake component and the shaft to fail to achieve the ideal matching state during the braking operation. In the braking process, the contact area between the brake component and the shaft cannot be kept stable, and the friction stress is seriously uneven. This not only greatly reduces the braking efficiency, but also makes it difficult for the equipment to brake in place in time and accurately when it needs to stop running, thereby causing the coal to accumulate and leak during transportation, and seriously affecting the production and transportation efficiency of coal. UTILITY MODEL CONTENTS

[0004] In order to make up for the above shortcomings, the utility model provides a protection device of mine hoist, which aims at improving the problem of low flexibility and adaptive ability of the positioning device in the prior art, and the problem of difficult accurate adjustment and positioning according to the shafts of different sizes and shapes.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a protection device of mine hoist, comprising an outer shell two, the outer wall of the outer shell two is fixedly connected with a fixed rod, the outer wall of the fixed rod is fixedly connected with a fixed block, the inner part of the fixed block is provided with a sliding groove, the inner wall of the sliding groove is slidably connected with a sliding block, the outer wall of the sliding block is fixedly connected with a positioning block, the side of the fixed block close to the positioning block is provided with an elastic component, the outer wall of the outer shell two is slidably connected with a connecting ring, the side away from the outer shell two of the connecting ring is fixedly connected with an outer shell one, the inner part of the outer shell one is fixedly connected with a mounting block, the inner part of the mounting block is threadedly connected with a screw, and the outer wall of the screw is threadedly connected with a sound-absorbing pad.

[0006] Further, the elastic component comprises a spring three, the outer wall of the spring three is arranged on the side of the fixed block close to the positioning block, and one end of the spring three is fixedly connected to the outer wall of the positioning block.

[0007] Further, the outer shell two outer wall fixedly connected with shell three, shell three inside fixedly connected with rotating rod, rotating rod outer wall rotationally connected with the clamping plate one, the clamping plate one outer wall slidingly connected in the connecting ring outer wall.

[0008] Further, the rotating rod outer wall rotationally connected with the clamping plate two, the clamping plate two outer wall slidingly connected in the connecting ring outer wall.

[0009] Further, the spring one one end fixedly connected in the clamping plate one inside one side, the spring one other end fixedly connected in the clamping plate two inside one side is arranged on the shell three upper.

[0010] Further, the clamping plate one outer wall rotationally connected in the shell three inside, the clamping plate two outer wall rotationally connected in the shell three inside.

[0011] Further, the damping pad inner wall rotationally connected with the friction lining, the friction lining outer wall is equipped with the mute slot two, the friction lining inner wall fixedly connected with the brake shoe one, the brake shoe one inner wall fixedly connected with the brake shoe two, the brake shoe two outer wall is equipped with the mute slot one.

[0012] Further, the positioning block outer wall slidingly connected in the fixed block outer wall, the shell one outer wall is equipped with the heat dissipation groove.

[0013] The utility model has the advantages of:

[0014] 1, the utility model discloses a mute slot two and mute slot one pass through special structure design, break the vibration propagation path, consume vibration energy, inhibit the noise generation, and the damping pad itself can also absorb part noise, reduce noise to the outside propagation, create relatively quiet operating environment for mine hoist, and the self -adaptation positioning device is composed of fixed block, sliding slot, sliding block, positioning block and spring three, and the positioning block can slide in the sliding slot under the driving of sliding block according to the actual size and shape of shaft, and is accurately attached to the surface of shaft under the elastic action of spring three, realizes accurate positioning to different size shafts, and this accurate positioning ensures that the brake part is closely and uniformly contacted with the shaft, avoids the collision and uneven friction caused by bad contact when braking, thereby reduces the noise generated by collision, and guarantees stable and reliable braking effect simultaneously.

[0015] 2、The utility model discloses, through design one quick fixing device replace existing screw installation, can obviously simplify installation process, and traditional screw installation needs to twist screw one by one, and the operation is complicated and time -consuming, through buckle type convenient connection mode, can realize quick assembly, and the installation time is greatly reduced, and the installation efficiency is improved, and the manpower cost is saved, when the equipment daily maintenance and cleaning, quick fixing device advantage is obvious, and the maintenance personnel can easily dismantle relevant parts, and the equipment shell is quickly opened, and it is convenient to check, clean and replace internal brake parts, sound -proof pad etc. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic diagram of the protection equipment of mine hoist that the utility model proposes;

[0017] Figure 2 It is a part of shell structure schematic diagram of the protection equipment of mine hoist that the utility model proposes;

[0018] Figure 3 It is Figure 2 The enlarged view of A in

[0019] Figure 4 It is a sound -proof pad part structure schematic diagram of the protection equipment of mine hoist that the utility model proposes

[0020] Figure 5 It is a fixed block part structure schematic diagram of the protection equipment of mine hoist that the utility model proposes

[0021] Figure 6 It is the enlarged view of B in Figure 3

[0022] Legend:

[0023] 1, shell one;2, connecting ring;3, shell two;4, brake shoe one;5, friction lining;6, mute slot one;7, spring one;8, clamping plate one;9, shell three;10, rotating rod;11, mute slot two;12, clamping plate two;13, mounting block;14, screw;15, brake shoe two;16, fixed rod;17, fixed block;18, sliding block;19, spring three;20, positioning block;21, sliding groove;22, sound -proof pad;23, heat dissipation groove. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.​

[0025] Referring to Figure 1 , Figure 3 and Figure 4 , the utility model provides a kind of embodiment of protective equipment of mine hoist: a kind of protective equipment of mine hoist, including shell two 3, fixedly connected with fixed rod 16 on the outer wall of shell two 3, fixedly connected with fixed block 17 on the outer wall of fixed rod 16, the inside of fixed block 17 is equipped with sliding slot 21, sliding block 18 is slidably connected in the inner wall of sliding slot 21, fixedly connected with locating block 20 on the outer wall of sliding block 18, fixed block 17 is close to the side of locating block 20 and is provided with elastic component, the outer wall of shell two 3 is slidably connected with connecting ring 2, fixedly connected with shell one 1 on the side of connecting ring 2 away from shell two 3, fixedly connected with mounting block 13 in the inside of shell one 1, screw 14 is screw-connected in the inside of mounting block 13, sound-absorbing pad 22 is screw-connected on the outer wall of screw 14;Elastic component includes spring three 19, spring three 19 is set on the side of fixed block 17 close to locating block 20 on the outer wall, and one end of spring three 19 is fixedly connected on the outer wall of locating block 20;Rotatably connected with friction lining 5 on the inner wall of sound-absorbing pad 22, the outer wall of friction lining 5 is equipped with mute slot two 11, fixedly connected with brake shoe one 4 on the inner wall of friction lining 5, fixedly connected with brake shoe two 15 on the inner wall of brake shoe one 4, and mute slot one 6 is equipped on the outer wall of brake shoe two 15;Locating block 20 is slidably connected on the outer wall of fixed block 17, and the outer wall of shell one 1 is equipped with heat dissipation groove 23.

[0026] Specifically, the shell two 3 is an important supporting structure of the whole protection device, which plays a role in connecting and fixing other components, and provides a stable mounting base for internal components. The outer wall of the shell two 3 is fixedly connected with a fixing rod 16, which is used to stably mount a fixing block 17 on the shell two 3, so that the fixing block 17 maintains a relatively fixed positional relationship with the shell two 3, ensuring the normal implementation of subsequent positioning and adjustment functions. The outer wall of the fixing rod 16 is fixedly connected with the fixing block 17, which is not only a carrier of the sliding groove 21, but also provides mounting positions for the sliding block 18, the positioning block 20 and the elastic assembly, and is a key component for realizing the flexible movement and positioning function of the positioning block 20. The fixing block 17 is internally provided with a sliding groove 21, which provides a sliding track for the sliding block 18, so that the sliding block 18 can smoothly slide in the sliding groove 21, thereby driving the positioning block 20 to adjust the position to adapt to mine hoist shafts of different sizes and shapes. The inner wall of the sliding groove 21 is slidably connected with the sliding block 18, which can move flexibly in the sliding groove 21, and the positioning block 20 fixedly connected to the outer wall of the sliding block 18 moves accordingly, realizing accurate positioning of the mine hoist shaft, improving the fitting precision between the brake components and the shaft. The outer wall of the sliding block 18 is fixedly connected with the positioning block 20, which can adjust the position under the driving of the sliding block 18 according to the actual situation of the mine hoist shaft, tightly fit the shaft, and provide a precise positioning basis for accurate braking of the brake shoe one 4 and the brake shoe two 15, ensuring stable and reliable braking effect. The side of the fixing block 17 close to the positioning block 20 is provided with an elastic assembly, which includes a spring three 19. The outer wall of the spring three 19 is arranged on the side of the fixing block 17 close to the positioning block 20, and one end is fixedly connected to the outer wall of the positioning block 20. The spring three 19 plays a role in buffering and self-adaptive adjustment. When the positioning block 20 contacts shafts of different sizes or shapes, the spring three 19 can deform elastically to make the positioning block 20 better fit the surface of the shaft, enhance the stability and adaptability of positioning, and reduce the impact force caused by collision, protecting the device components. The outer wall of the shell two 3 is slidably connected with a connecting ring 2, which realizes the relative sliding connection between the shell one 1 and the shell two 3, so that they can not only maintain a connection relationship, but also move relatively within a certain range, facilitating the adjustment of the position and state of the device according to actual use requirements. The side of the connecting ring 2 away from the shell two 3 is fixedly connected with the shell one 1, and the shell one 1 and the shell two 3 together constitute the external protective structure of the protection device, protecting the interior from the interference and damage of the external environment, and providing mounting space for internal components such as the mounting block 13. The inner wall of the shell one 1 is fixedly connected with the mounting block 13, which is used to fix the screw 14 and provide a stable mounting position for the screw 14, ensuring that the screw 14 can be accurately mounted in the shell one 1, and then fixing the sound-absorbing pad 22. The inner wall of the mounting block 13 is threadedly connected with the screw 14, which is firmly mounted in the shell one 1 through the threaded connection with the mounting block 13, ensuring that the sound-absorbing pad 22 remains stable during the operation of the device and plays its sound-absorbing role.The outer wall of the screw 14 is threadedly connected with a sound-absorbing pad 22, which is mainly used to reduce the noise generated during the operation of the equipment. The inner wall of the sound-absorbing pad 22 is rotatably connected with a friction lining 5. When the brake shoe one 4 and the brake shoe two 15 are in contact with the shaft of the mine hoist to brake, the sound-absorbing pad 22 can absorb part of the vibration energy generated by friction, reduce the propagation of noise, and the inner wall of the sound-absorbing pad 22 is rotatably connected with the friction lining 5. The friction lining 5 directly contacts with the shaft of the mine hoist during braking, and generates braking force by using its friction characteristics to make the shaft stop rotating. At the same time, the mute slot two 11 opened on the outer wall of the friction lining 5 can disrupt the vibration propagation path, further inhibit the generation of noise, and the outer wall of the friction lining 5 is provided with the mute slot two 11. The mute slot two 11 changes the propagation mode of vibration on the surface of the friction lining 5 through special structural design, consumes vibration energy, effectively reduces the noise generated by friction, improves the quietness of equipment operation, and the inner wall of the friction lining 5 is fixedly connected with the brake shoe one 4. The brake shoe one 4 works cooperatively with the brake shoe two 15 to tightly hold the shaft of the mine hoist during braking, generates strong friction force, and realizes the braking of the shaft, which is one of the key components to ensure the safe stop of the mine hoist. The inner wall of the brake shoe one 4 is fixedly connected with the brake shoe two 15, which cooperates with the brake shoe one 4 to increase the contact area and friction force with the shaft, improve the braking effect, and the mute slot one 6 opened on the outer wall of the brake shoe two 15 can also play a role in dispersing and absorbing vibration energy, reducing the noise generated during braking. The outer wall of the brake shoe two 15 is provided with the mute slot one 6, and the mute slot one 6 and the mute slot two 11 work together to consume vibration energy from different positions and angles, thereby minimizing the noise generated during braking and creating a relatively quiet operating environment for the mine hoist. The outer wall of the positioning block 20 is slidingly connected to the outer wall of the fixed block 17. This connection ensures the smoothness of the positioning block 20 sliding on the fixed block 17, enhances the stability of the positioning block 20 during positioning, and ensures the positioning accuracy is not affected. The outer wall of the outer shell one 1 is provided with a heat dissipation slot 23, which can increase the heat dissipation area of the outer shell one 1, speed up the dissipation of heat generated during equipment operation, avoid the influence of overheating on the performance and service life of the equipment, and ensure the stability and reliability of the equipment during long-time operation.

[0027] Referring to Figure 1 and Figure 2 , the outer wall of the outer shell two 3 is fixedly connected with the outer shell three 9, the inner wall of the outer shell three 9 is fixedly connected with the rotating rod 10, the outer wall of the rotating rod 10 is rotatably connected with the clamping plate one 8, and the outer wall of the clamping plate one 8 is slidingly connected to the outer wall of the connecting ring 2. The outer wall of the rotating rod 10 is rotatably connected with the clamping plate two 12, and the outer wall of the clamping plate two 12 is slidingly connected to the outer wall of the connecting ring 2. The outer shell three 9 is provided with a spring one 7 at the top, one end of the spring one 7 is fixedly connected to the inner side of the clamping plate one 8, and the other end of the spring one 7 is fixedly connected to the inner side of the clamping plate two 12. The outer wall of the clamping plate one 8 is rotatably connected to the inner wall of the outer shell three 9, and the outer wall of the clamping plate two 12 is rotatably connected to the inner wall of the outer shell three 9.

[0028] Specifically, the outer wall of the shell two 3 is fixedly connected with the shell three 9, the shell three 9 provides a mounting space and a support structure, which is closely connected with the shell two 3, enhances the structural stability of the whole protection device, enables the internal components to work cooperatively, the inner wall of the shell three 9 is fixedly connected with the rotating rod 10, the rotating rod 10 serves as the rotating shaft of the clamping plate one 8 and the clamping plate two 12, provides the center and support for them to rotate, ensures that the clamping plate one 8 and the clamping plate two 12 can stably rotate around them, and further realizes the installation effect, the outer wall of the rotating rod 10 is rotatably connected with the clamping plate one 8, the clamping plate one 8 can flexibly rotate around the rotating rod 10, and the outer wall thereof is slidably connected to the outer wall of the connecting ring 2, when the connecting ring 2 slides on the outer wall of the shell two 3, the clamping plate one 8 can move along with it and adjust the position through the rotation of itself, during the installation or use of the device, the clamping plate one 8 can play a role in auxiliary positioning and limiting to prevent the connecting ring 2 from excessively sliding, and ensure that the relative position between the connecting ring 2 and the shell two 3 is kept within a reasonable range, the outer wall of the clamping plate one 8 is slidably connected to the outer wall of the connecting ring 2, which can create conditions for the clamping plate one 8 to clamp the connecting ring 2, the outer wall of the rotating rod 10 is rotatably connected with the clamping plate two 12, the clamping plate two 12 also rotates around the rotating rod 10 and cooperates with the clamping plate one 8, in terms of function, the clamping plate two 12 is similar to the clamping plate one 8, realizes the quick installation between the shell one 1 and the shell two 3, the outer wall of the clamping plate two 12 is slidably connected to the outer wall of the connecting ring 2, so that the clamping end of the clamping plate two 12 is clamped to the outer wall of the connecting ring 2, and the fixing effect is realized, the upper portion of the shell three 9 is provided with the spring one 7, one end of the spring one 7 is fixedly connected to the inner side of the clamping plate one 8, and the other end thereof is fixedly connected to the inner side of the clamping plate two 12, the spring one 7 plays a role in elastic connection and buffering, and provides elastic force for the clamping plate one 8 and the clamping plate two 12, one end of the spring one 7 is fixedly connected to the inner side of the clamping plate one 8, this connection mode enables the elastic force of the spring one 7 to directly act on the clamping plate one 8, and the clamping plate one 8 will return to the original position after losing the stress, thereby creating conditions for the next fixation, the other end of the spring one 7 is fixedly connected to the inner side of the clamping plate two 12, which ensures that the spring one 7 can also exert effective elastic force on the clamping plate two 12, so that the clamping plate two 12 cooperates with the clamping plate one 8 under the action of the spring one 7 to jointly position and limit the connecting ring 2, the outer wall of the clamping plate one 8 is rotatably connected in the shell three 9, this connection mode ensures the flexibility of the clamping plate one 8 to rotate in the shell three 9, and also limits the rotation range of the clamping plate one 8, so that it can rotate within a specified angle, avoiding affecting the normal operation of the device due to excessive rotation, the outer wall of the clamping plate two 12 is rotatably connected in the shell three 9, which is similar to the clamping plate one 8, provides stable rotating support for the clamping plate two 12, and ensures that it can flexibly rotate in the shell three 9.

[0029] Working principle: when installing the shell one 1 and the shell two 3, first, the connecting ring 2 is sleeved on the outer wall of the shell two 3, since the connecting ring 2 and the shell two 3 are slidingly connected, so the position can be flexibly adjusted, at this time, the clamping plate one 8 and the clamping plate two 12 on the shell three 9 play a role, the clamping plate one 8 and the clamping plate two 12 rotate around the rotating rod 10 respectively, and the outer walls of them are slidingly connected on the outer wall of the connecting ring 2, the clamping plate one 8 and the clamping plate two 12 are rotated to the appropriate angle, so that they clamp the connecting ring 2, under the elastic force of the spring one 7, the clamping plate one 8 and the clamping plate two 12 are tightly attached to the connecting ring 2, so that the quick installation of the shell one 1 and the shell two 3 is realized, when disassembling, external force is applied to overcome the elastic force of the spring one 7, so that the clamping plate one 8 and the clamping plate two 12 are separated from the connecting ring 2, after losing the pressure, under the action of the spring one 7, the clamping plate one 8 and the clamping plate two 12 return to the original position, creating conditions for the next installation, when the mine hoist needs to be braked, the positioning block 20 plays a key role in the whole braking process, the sliding block 18 in the fixed block 17 slides in the sliding groove 21, drives the positioning block 20 to move, the positioning block 20 can be accurately attached to the surface of the shaft according to the actual size and shape of the shaft of the mine hoist, under the self-adaptive adjustment of the elastic assembly spring three 19, after positioning, the brake shoe one 4 and the brake shoe two 15 tightly hold the shaft of the mine hoist under the action of external force, strong friction force is generated between the brake shoe one 4 and the brake shoe two 15 and the shaft, so that the brake of the shaft is realized, the mine hoist stops running, during the operation of the equipment, the brake shoe one 4 and the brake shoe two 15 and the shaft friction will produce vibration and noise, at this time, the sound-absorbing pad 22, the mute slot one 6 and the mute slot two 11 work cooperatively to reduce the noise, the sound-absorbing pad 22 is installed inside the shell one 1, it can absorb part of the vibration energy generated by friction, the mute slot two 11 on the outer wall of the friction lining 5 and the mute slot one 6 on the outer wall of the brake shoe two 15, through special structural design, disrupt the vibration propagation path, consume vibration energy, effectively suppress noise generation, reduce noise propagation to the outside, at the same time, the heat dissipation groove 23 opened on the outer wall of the shell one 1 increases the heat dissipation area of the shell one 1, speeds up the heat dissipation during the operation of the equipment, avoids the influence of overheating on the performance and service life of the equipment, ensures the stability and reliability of the equipment during long-time operation.

[0030] Finally, it should be pointed out that: the above only preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A protection device of a mine hoist comprising a housing (2), characterized in that: The outer shell two (3) is fixedly connected with a fixed rod (16), the outer wall of the fixed rod (16) is fixedly connected with a fixed block (17), the inner part of the fixed block (17) is provided with a sliding groove (21), the inner wall of the sliding groove (21) is slidably connected with a sliding block (18), the outer wall of the sliding block (18) is fixedly connected with a positioning block (20), the fixed block (17) is provided with an elastic component close to the positioning block (20), the outer wall of the outer shell two (3) is slidably connected with a connecting ring (2), the side, away from the outer shell two (3), of the connecting ring (2) is fixedly connected with an outer shell one (1), the inner part of the outer shell one (1) is fixedly connected with a mounting block (13), the inner part of the mounting block (13) is threadedly connected with a screw (14), and the outer wall of the screw (14) is threadedly connected with a sound-absorbing pad (22).

2. A mine hoist protection device according to claim 1, characterised in that: The elastic component comprises a spring three (19), the outer wall of the spring three (19) is arranged on the side, close to the positioning block (20), of the fixed block (17), and one end of the spring three (19) is fixedly connected to the outer wall of the positioning block (20).

3. A mine hoist protection device according to claim 1, characterized in that: The outer wall of the outer shell two (3) is fixedly connected with an outer shell three (9), the inner part of the outer shell three (9) is fixedly connected with a rotating rod (10), the outer wall of the rotating rod (10) is rotatably connected with a clamping plate one (8), and the outer wall of the clamping plate one (8) is slidably connected to the outer wall of the connecting ring (2).

4. A mine hoist protection device according to claim 3, characterised in that: The outer wall of the rotating rod (10) is rotatably connected with a clamping plate two (12), and the outer wall of the clamping plate two (12) is slidably connected to the outer wall of the connecting ring (2).

5. A mine hoist protection device according to claim 4, characterised in that: The upper part of the outer shell three (9) is provided with a spring one (7), one end of the spring one (7) is fixedly connected to the inner side of the clamping plate one (8), and the other end of the spring one (7) is fixedly connected to the inner side of the clamping plate two (12).

6. A mine hoist protection device according to claim 5, characterised in that: The outer wall of the clamping plate one (8) is rotatably connected in the inner part of the outer shell three (9), and the outer wall of the clamping plate two (12) is rotatably connected in the inner part of the outer shell three (9).

7. A mine hoist protection apparatus according to claim 1, characterized in that: The inner wall of the sound-absorbing pad (22) is rotatably connected with a friction lining (5), the outer wall of the friction lining (5) is provided with a mute groove two (11), the inner wall of the friction lining (5) is fixedly connected with a brake shoe one (4), the inner wall of the brake shoe one (4) is fixedly connected with a brake shoe two (15), and the outer wall of the brake shoe two (15) is provided with a mute groove one (6).

8. A mine hoist protection device according to claim 1, characterized in that: The outer wall of the positioning block (20) is slidably connected to the outer wall of the fixed block (17), and the outer wall of the outer shell one (1) is provided with a heat dissipation groove (23).

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