A device for setting a hydraulic pressure safety mechanism

Abstract

The present invention discloses a setting device for a water pressure insurance mechanism. The device includes: a water pressure rod group, which includes: a water pressure rod, a water pressure spring, a spring support cylinder, a clamping plate and a base body; the water pressure rod sleeving the spring support cylinder and the water pressure spring is fixed on the base body and the clamping plate; a limiting groove is provided on the water pressure rod; the water pressure rod can move axially; a setting group, which includes: a rotating shaft and a cam; the rotating shaft penetrates through the base body and the clamping plate; the cam is sleeved on the periphery of the rotating shaft; the top of the water pressure rod and the top of the rotating shaft are located outside the sealing cavity; rotating the rotating shaft can drive the cam to rotate; a circuit on-off group, which includes: a sleeve, a water pressure rotating rod, a water pressure rotating piece, a contact piece group; the cam is in contact with the water pressure rotating piece, when the cam rotates, it drives the water pressure rotating piece to move into the limiting groove for limiting; the rotation of the water pressure rotating piece drives the water pressure rotating rod and the sleeve to rotate; a spacer is provided on the sleeve, and the rotation of the spacer can control the on-off of the contact piece group; the setting device for the water pressure insurance mechanism of the present invention is convenient to operate and has a simple mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of water pressure safety mechanisms, and in particular to a water pressure safety mechanism setting device. Background Art

[0002] The hydraulic safety mechanism is widely used in mines, mostly in mine safety devices and separation action devices, and mainly plays a safety role. At present, the setting method of the hydraulic safety mechanism is mainly to manually press the hydraulic rod and manually turn the hydraulic rotating piece to rotate the hydraulic rotating piece into the limit structure on the hydraulic rod, so as to realize the axial constraint of the hydraulic rod and complete the setting of the hydraulic safety mechanism. Since the hydraulic safety mechanism is installed in the sealed mine shell (sealed cavity), if the hydraulic safety mechanism after installation needs to be reset, the mine shell section must be disconnected or the hydraulic mechanism must be taken out from the mine shell before manual setting (i.e., manually press the hydraulic rod and manually turn the hydraulic rotating piece). However, in the process of testing, it is necessary to manually simulate the hydraulic pressure of the hydraulic mechanism frequently. For safety reasons, if it needs to be reset, the hydraulic safety mechanism must be taken out from the sealed cavity or the sealed cavity section must be disconnected for reset. This method increases the workload, reduces productivity, and causes a series of problems such as product sealing reliability.

[0003] There is currently no effective solution to the problem that in the prior art, the water pressure safety mechanism must be removed from the sealing cavity or the sealing cavity end must be disconnected for resetting, which increases the workload, reduces production efficiency, and causes problems in product sealing reliability. Summary of the invention

[0004] A water pressure safety mechanism setting device is provided in an embodiment of the present invention to solve the problem in the prior art that the water pressure safety mechanism must be removed from the sealing cavity or the sealing cavity end must be disconnected for resetting, which increases the workload, reduces production efficiency, and causes product sealing reliability.

[0005] To achieve the above object, the present invention provides a device for setting a hydraulic pressure insurance mechanism. The device includes: a hydraulic pressure rod group, which includes a hydraulic pressure rod, a hydraulic pressure spring, a spring support cylinder, a clamping plate, and a base body; the hydraulic pressure rod penetrates through the base body, the base body is located in a sealed cavity, the top of the hydraulic pressure rod is located outside the sealed cavity, and the spring support cylinder and the hydraulic pressure spring are sleeved outside the hydraulic pressure rod and below the bottom of the base body; the clamping plate is arranged at the bottom of the spring support cylinder, and the hydraulic pressure rod penetrates through the clamping plate; a limiting groove is arranged on the hydraulic pressure rod and below the bottom of the clamping plate; the hydraulic pressure rod can move axially; a setting group, which includes a rotating shaft and a cam; the rotating shaft penetrates through the base body and the clamping plate; the cam is sleeved outside the rotating shaft and below the bottom of the clamping plate; the top of the rotating shaft is located outside the sealed cavity; a circuit on-off group, which includes a sleeve, a hydraulic pressure rotating rod, a hydraulic pressure rotating piece, and a contact piece group; the sleeve is located at the bottom of the base body; the bottom of the sleeve is fixedly connected to the top of the hydraulic pressure rotating rod, and the hydraulic pressure rotating rod penetrates through the clamping plate; the hydraulic pressure rotating piece is sleeved outside the hydraulic pressure rotating rod and below the bottom of the clamping plate, and the cam is in contact with the hydraulic pressure rotating piece, and is used for driving the hydraulic pressure rotating piece to rotate when the cam rotates so that the hydraulic pressure rotating piece moves into the limiting groove for limiting; a spacer is arranged on the sleeve, and is used for controlling the on-off of the contact piece group when the sleeve rotates; the contact piece group is fixedly connected to the bottom of the base body.

[0006] Optionally, the hydraulic pressure rod group further includes a hydraulic pressure film; the hydraulic pressure film is located in the base body and is fixedly connected to the hydraulic pressure rod, and is used for driving the hydraulic pressure rod to move axially when the external hydraulic pressure value reaches the set value of the hydraulic pressure film.

[0007] Optionally, the setting group further includes a sealing ring; a plurality of sealing rings are arranged and sleeved outside the rotating shaft, and are used for realizing the sealing between the rotating shaft and the base body.

[0008] Optionally, the setting group further includes a nut; the nut is used for pressing the cam on the rotating shaft.

[0009] Optionally, the circuit on-off group further includes a torsion spring; the torsion spring is sleeved outside the hydraulic pressure rotating rod.

[0010] Optionally, the spring support cylinder is located at the top of the clamping plate; the hydraulic pressure spring sleeves the spring support cylinder and the hydraulic pressure rod; the top surface of the hydraulic pressure spring abuts against the bottom surface of the base, and the bottom surface of the hydraulic pressure spring abuts against the top surface of the clamping plate; the height of the spring support cylinder is less than the height of the hydraulic pressure spring.

[0011] Optionally, the water pressure rod group further includes: a cover plate; the cover plate is used to fixedly seal the water pressure rod and the base body.

[0012] Optionally, it further includes: a rotating device; the rotating device is used to rotate the rotating shaft.

[0013] Optionally, an insulating layer is coated on the periphery of the spacer.

[0014] Optionally, the contact piece group is of a metal structure.

[0015] Advantages of the present invention:

[0016] The present invention provides a water pressure insurance mechanism setting device, which includes: a water pressure rod group, and the water pressure rod group includes: a water pressure rod, a water pressure spring, a spring support cylinder, a clamping plate and a base body; the water pressure rod sleeving the spring support cylinder and the water pressure spring is fixed on the base body and the clamping plate; a limiting groove is provided on the water pressure rod and below the bottom of the clamping plate; the top of the water pressure rod is located outside the sealing cavity; the water pressure rod can move axially; a setting group, and the setting group includes: a rotating shaft and a cam; the rotating shaft penetrates through the base body and the clamping plate; the cam is sleeved below the bottom of the clamping plate and outside the periphery of the rotating shaft; the top of the rotating shaft is located outside the sealing cavity; rotating the rotating shaft can drive the cam to rotate; a circuit on-off group, and the circuit on-off group includes: a sleeve, a water pressure rotating rod, a water pressure rotating piece, and a contact piece group; the cam is in contact with the water pressure rotating piece, and is used to drive the water pressure rotating piece to rotate when the cam rotates so that the water pressure rotating piece moves into the limiting groove for limiting; the rotation of the water pressure rotating piece drives the water pressure rotating rod and the sleeve to rotate; a spacer is provided on the sleeve, and is used to rotate the spacer when the sleeve rotates to control the on-off of the contact piece group; the contact piece group is fixedly connected to the bottom of the base body. The water pressure insurance mechanism setting device of the present invention is convenient to operate and has a simple structure, and can realize rotating the rotating shaft of the water pressure insurance mechanism outside the sealing cavity, thereby driving the water pressure rotating piece to move into the limiting groove to stop the axial movement of the water pressure rod, axially limiting the water pressure rod, and ensuring that the spacer rotates out of the contact piece group to make the contact piece group energized, completing the setting of the water pressure insurance mechanism, and avoiding the problems of large workload, low productivity and unreliable sealing caused by disconnecting the sealing cavity section or taking out the water pressure insurance mechanism from the sealing cavity. Description of the drawings

[0017] Figure 1 is the front view of the water pressure insurance mechanism setting device provided by the embodiment of the present invention;

[0018] Figure 2 is the top view of the water pressure insurance mechanism setting device provided by the embodiment of the present invention;

[0019] Figure 3 is a structural schematic diagram of a hydraulic rod group provided by an embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of the structure of a setting group provided in an embodiment of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of a circuit on-off group provided in an embodiment of the present invention.

[0022] Explanation of symbols:

[0023] Hydraulic rod-1, hydraulic spring-2, spring support tube-3, splint-4, base-5, limit groove-6, hydraulic membrane-7, cover plate-8, rotating shaft-9, cam-10, sealing ring-11, nut-12, sleeve-13, hydraulic rotating rod-14, hydraulic rotating plate-15, contact plate group-16, spacer plate-17, torsion spring-18. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The hydraulic safety mechanism is widely used in mines, and is mostly used in mine safety devices and separation action devices, mainly for safety. At present, the setting method of the hydraulic safety mechanism is mainly to manually press down the hydraulic rod 1, manually turn the hydraulic rotating piece 15, and rotate the hydraulic rotating piece 15 to the limit structure on the hydraulic rod 1, so as to realize the axial constraint of the hydraulic rod 1 and complete the setting of the hydraulic safety mechanism. Since the hydraulic safety mechanism is installed in the sealed mine shell (sealed cavity), if the hydraulic safety mechanism after installation needs to be reset, the mine shell section must be disconnected or the hydraulic mechanism must be taken out from the mine shell before manual setting (i.e., manually press down the hydraulic rod 1 and manually turn the hydraulic rotating piece 15). However, in the process of testing, it is necessary to manually simulate the hydraulic pressure of the hydraulic mechanism frequently. For safety reasons, if it needs to be reset, the hydraulic safety mechanism must be taken out from the sealed cavity or the sealed cavity section must be disconnected for reset. This method increases the workload, reduces productivity, and causes a series of problems such as product sealing reliability.

[0026] Therefore, the present invention provides a water pressure safety mechanism setting device which is easy to operate and has a simple structure, and can realize resetting of the water pressure safety mechanism outside the sealed cavity.

[0027] Figure 1It is the front view of a water pressure insurance mechanism provided by an embodiment of the present invention. Figure 2 It is the top view of a water pressure insurance mechanism provided by an embodiment of the present invention. As Figure 1 and Figure 2 shown, the device includes:

[0028] A water pressure rod group. Figure 3 It is the structural schematic diagram of the water pressure rod group provided by an embodiment of the present invention. As Figure 3 shown, the water pressure rod group includes:

[0029] A water pressure rod 1, a water pressure spring 2, a spring support cylinder 3, a clamping plate 4 and a base body 5; the water pressure rod 1 penetrates through the base body 5, the base body 5 is located in a sealed cavity, the top of the water pressure rod 1 is located outside the sealed cavity, and the spring support cylinder 3 and the water pressure spring 2 are sleeved outside the water pressure rod 1 and at the bottom of the base body 5; the clamping plate 4 is arranged at the bottom of the spring support cylinder 3, and the water pressure rod 1 penetrates through the clamping plate 4; a limiting groove 6 is arranged on the water pressure rod 1 and under the bottom of the clamping plate 4; the water pressure rod 1 can move axially.

[0030] In an alternative embodiment, the base body 5 is of a cylindrical structure, the water pressure rod 1 is of a longitudinally long cylindrical structure, the water pressure rod 1 penetrates through the base body 5 to form a Chinese character "zhong" structure, the base body 5 is located in a sealed cavity, and the top of the water pressure rod 1 is located outside the sealed cavity, so that an operator can manually press the water pressure rod 1; the water pressure rod 1 after penetrating through the base body 5 penetrates through the clamping plate 4, and the clamping plate 4 is located under the bottom of the base body 5, that is, there is a certain distance between the bottom of the base body 5 and the top of the clamping plate 4.

[0031] The spring support cylinder 3 and the water pressure spring 2 are sleeved outside the water pressure rod 1 and at the bottom of the base body 5;

[0032] Specifically, the spring support cylinder 3 is located at the top of the clamping plate 4; the water pressure spring 2 sleeves the spring support cylinder 3 and the water pressure rod 1; the top surface of the water pressure spring 2 abuts against the bottom surface of the base, and the bottom surface of the water pressure spring 2 abuts against the top surface of the clamping plate 4; the height of the spring support cylinder 3 is less than the height of the water pressure spring 2.

[0033] A limiting groove 6 is arranged on the water pressure rod 1 and under the bottom of the clamping plate 4; the water pressure rod 1 can move axially;

[0034] In an alternative embodiment, the water pressure rod group further includes: a water pressure film 7; the water pressure film 7 is located inside the base body 5, and the water pressure film 7 is fixedly connected to the water pressure rod 1, and is used to drive the water pressure rod 1 to move axially when the external water pressure value reaches the set value of the water pressure film 7. In another alternative embodiment, the water pressure rod 1 can also be manually pressed to make the water pressure rod 1 move axially, specifically, the water pressure rod 1 is moved to a position where the limit groove 6 on the water pressure rod 1 is located below the bottom of the base body 5.

[0035] In an alternative embodiment, the water pressure rod group further includes: a cover plate 8; the cover plate 8 is used to seal and fix the water pressure rod 1 and the base body 5. Specifically, in the present invention, the cover plate 8 is arranged on the top of the base body 5.

[0036] Figure 4 is a schematic structural diagram of the setting group provided by the embodiment of the present invention, as Figure 4 shown, the setting group includes: a rotating shaft 9 and a cam 10; the rotating shaft 9 penetrates through the base body 5 and the clamping plate 4; the cam 10 is sleeved around the rotating shaft 9 and is located below the bottom of the clamping plate 4; the top of the rotating shaft 9 is located outside the sealing cavity;

[0037] In the present invention, the rotating shaft 9 is a longitudinally long cylindrical structure, and the top of the rotating shaft 9 is located outside the sealing cavity, so that the rotating shaft 9 can be operated outside the sealing cavity;

[0038] In an alternative embodiment, the setting group further includes: a nut 12; the nut 12 is used to press the cam 10 against the rotating shaft 9. In the present invention, the nut 12 is located at the bottom of the cam 10.

[0039] In an alternative embodiment, it further includes: a rotating device; the rotating device is used to rotate the rotating shaft 9. Specifically, by rotating the rotating shaft 9 through the rotating device, the cam 10 installed on the rotating shaft 9 can be driven to rotate.

[0040] In an alternative embodiment, the setting group further includes: a sealing ring 11; a plurality of sealing rings 11 are provided, and the plurality of sealing rings 11 are sleeved around the rotating shaft 9 for realizing the sealing between the rotating shaft 9 and the base body 5. Specifically, in the present invention, 2 sealing rings 11 are provided, and the 2 sealing rings 11 are sleeved around the rotating shaft 9 and are located inside the base body 5, so as to ensure the sealing performance between the base body 5 and the rotating shaft 9.

[0041] Figure 5 is a schematic structural diagram of the circuit on-off group provided by the embodiment of the present invention, as Figure 5As shown, the circuit on-off group includes: a sleeve 13, a water pressure rotating rod 14, a water pressure rotating piece 15, and a contact piece group 16; the sleeve 13 is located at the bottom of the base body 5, the bottom of the sleeve 13 is fixedly connected to the top of the water pressure rotating rod 14, and the water pressure rotating rod 14 penetrates through the clamping plate 4; a water pressure rotating piece 15 is sleeved outside the water pressure rotating rod 14 and below the bottom of the clamping plate 4, and the cam 10 is in contact with the water pressure rotating piece 15 for driving the water pressure rotating piece 15 to rotate when the cam 10 rotates so that the water pressure rotating piece 15 moves into the limit groove 6 for limiting; a spacer 17 is arranged on the sleeve 13 for controlling the on-off of the contact piece group 16 when the sleeve 13 rotates; the contact piece group 16 is fixedly connected to the bottom of the base body 5.

[0042] In the present invention, the top of the water pressure rotating rod 14 penetrates into the bottom of the sleeve 13 to achieve the fixed connection between the water pressure rotating rod 14 and the sleeve 13; the bottom of the water pressure rotating rod 14 penetrates through the clamping plate 4, and a water pressure rotating piece 15 is sleeved outside the water pressure rotating rod 14 and below the bottom of the clamping plate 4, and the cam 10 is in contact with the water pressure rotating piece 15. When the rotating shaft 9 is rotated by a rotating device, the rotating shaft 9 drives the cam 10 to rotate. Since the cam 10 is in contact with the water pressure rotating piece 15, the water pressure rotating piece 15 is driven to rotate, and one end of the water pressure rotating piece 15 will move into the limit groove 6 of the water pressure rod 1 to achieve the axial limit of the water pressure rod 1. Further, since the water pressure rotating piece 15 is sleeved on the water pressure rotating rod 14, when the water pressure rotating piece 15 rotates, it will drive the water pressure rotating rod 14 to rotate. And since the water pressure rotating rod 14 is fixedly connected to the sleeve 13, when the water pressure rotating rod 14 rotates, it will drive the sleeve 13 to rotate. A spacer 17 is arranged on the top of the sleeve 13 for controlling the on-off of the contact piece group 16 when the sleeve 13 rotates; the contact piece group 16 is fixedly connected to the bottom of the base body 5.

[0043] Specifically, when the spacer 17 rotates into the contact piece group 16, the contact piece group 16 is in a closed state, and when the spacer 17 rotates out of the contact piece group 16, the contact piece group 16 is in a connected state. When the contact piece group 16 is in the connected state, the contact piece group 16 controls each component to complete the established actions.

[0044] In an alternative embodiment, an insulating layer is coated on the periphery of the spacer 17. The contact piece group 16 is of a metal structure. Thus, when the spacer 17 rotates into the contact piece group 16, the insulating layer contacts the metal, so that the contact piece group 16 is in a closed state. The base body 5 is of a metal structure. When the spacer 17 rotates out of the contact piece group 16, the metal no longer contacts the insulating layer, and further the contact piece group 16 is in a conducting state, and all the circuits connected to the contact piece group 16 are in a powered-on state.

[0045] In an alternative embodiment, the circuit on-off group further includes: a torsion spring 18; the torsion spring 18 is sleeved on the periphery of the water pressure rotating rod 14.

[0046] The following is illustrated by a specific embodiment:

[0047] When the external water pressure value reaches the set value of the water pressure film 7, the water pressure film 7 drives the water pressure rod 1 to move axially (specifically, the water pressure rod 1 is moved to the position where the limit groove 6 on the water pressure rod 1 is located below the bottom of the base body 5). By rotating the rotating shaft 9 clockwise through the rotating device, the rotating shaft 9 rotates and further drives the cam 10 thereon to rotate. The cam 10 contacts the water pressure rotating piece 15, and further drives the water pressure rotating piece 15 to rotate, so that the water pressure rotating piece 15 rotates into the limit groove 6 to realize the axial limit of the water pressure rod 1. When the water pressure rotating piece 15 rotates, it drives the water pressure rotating rod 14 and the sleeve 13 to rotate in sequence, and further rotates the spacer 17 on the sleeve 13 out of the contact piece group 16. The contact piece group 16 is in a conducting state, and all the circuits connected to the contact piece group 16 are in a powered-on state.

[0048] On the contrary, by rotating the rotating shaft 9 counterclockwise through the rotating device, the rotating shaft 9 rotates and further drives the cam 10 thereon to rotate. The cam 10 contacts the water pressure rotating piece 15, and further drives the water pressure rotating piece 15 to rotate, so that the water pressure rotating piece 15 rotates out of the limit groove 6 and no longer axially limits the water pressure rod 1. When the water pressure rotating piece 15 rotates, it drives the water pressure rotating rod 14 and the sleeve 13 to rotate in sequence, and further rotates the spacer 17 on the sleeve 13 into the contact piece group 16. The insulating layer of the spacer 17 contacts the metal layer of the contact piece group 16, and the contact piece group 16 is in a closed state, and all the circuits connected to the contact piece group 16 are in a powered-off state.

[0049] Advantages of the present invention:

[0050] The setting device of the hydraulic pressure safety mechanism of the present invention is convenient to operate and has a simple structure. It can rotate the rotating shaft 9 of the hydraulic pressure safety mechanism outside the sealed cavity, thereby driving the hydraulic pressure rotating piece 15 to move into the limiting groove 6 to stop the axial movement of the hydraulic pressure rod 1, axially limit the hydraulic pressure rod 1, and ensure that the spacer 17 rotates out of the contact piece group 16 to energize the contact piece group 16, completing the setting of the hydraulic pressure safety mechanism, and avoiding the problems of large workload, low productivity and unreliable sealing caused by disconnecting the sealed cavity section or removing the hydraulic pressure safety mechanism from the sealed cavity.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water pressure insurance mechanism setting device, characterized in that, Comprising: A water pressure rod group, the water pressure rod group comprising: a water pressure rod, a water pressure spring, a spring support cylinder, a clamping plate and a base body; the water pressure rod penetrates through the base body, the base body is located inside a sealing cavity, the top of the water pressure rod is located outside the sealing cavity, and the spring support cylinder and the water pressure spring are sleeved around the water pressure rod and below the bottom of the base body; the clamping plate is arranged at the bottom of the spring support cylinder, and the water pressure rod penetrates through the clamping plate; a limiting groove is arranged on the water pressure rod and below the bottom of the clamping plate; the water pressure rod can move axially; A setting group, the setting group comprising: a rotating shaft and a cam; the rotating shaft penetrates through the base body and the clamping plate; the cam is sleeved around the rotating shaft and below the bottom of the clamping plate; the top of the rotating shaft is located outside the sealing cavity; A circuit on-off group, the circuit on-off group comprising: a sleeve, a water pressure rotating rod, a water pressure rotating piece, and a contact piece group; the sleeve is located at the bottom of the base body, the bottom of the sleeve is fixedly connected to the top of the water pressure rotating rod, and the water pressure rotating rod penetrates through the clamping plate; the water pressure rotating piece is sleeved outside the water pressure rotating rod and below the bottom of the clamping plate, and the cam is in contact with the water pressure rotating piece, and is used for driving the water pressure rotating piece to rotate when the cam rotates so that the water pressure rotating piece moves into the limiting groove for limiting; a spacer is arranged on the sleeve, and is used for when the sleeve rotates, the spacer rotates to control the on-off of the contact piece group; the contact piece group is fixedly connected to the bottom of the base body; The water pressure rod group further comprises: a water pressure film; The water pressure film is located inside the base body, and the water pressure film is fixedly connected to the water pressure rod, and is used for driving the water pressure rod to move axially when the external water pressure value reaches the set value of the water pressure film; The setting group further comprises: a sealing ring; A plurality of the sealing rings are sleeved around the rotating shaft, and are used for realizing the sealing between the rotating shaft and the base body.

2. The device according to claim 1, wherein The setting group further comprises: a nut; The nut is used for pressing the cam tightly on the rotating shaft.

3. The device according to claim 1, wherein The circuit on-off group further comprises: a torsion spring; The torsion spring is sleeved around the water pressure rotating rod.

4. The device according to claim 1, wherein: The spring support cylinder is located at the top of the clamping plate; the water pressure spring sleeves the spring support cylinder and the water pressure rod; the top surface of the water pressure spring abuts against the bottom surface of the base body, and the bottom surface of the water pressure spring abuts against the top surface of the clamping plate; the height of the spring support cylinder is less than the height of the water pressure spring.

5. The device according to claim 1, characterized in that, The water pressure rod group further comprises: a cover plate; The cover plate is used for sealing and fixing the water pressure rod and the base body.

6. The device according to claim 1, wherein Further comprising: A rotating device; The rotating device is used for rotating the rotating shaft.

7. The device according to claim 1, wherein: An insulating layer is coated on the periphery of the spacer.

8. The device according to claim 7, wherein: The contact piece group is of a metal structure.

Images