Electrode purging assembly and cooling mechanism

Abstract

The utility model discloses an electrode purging assembly and a cooling mechanism, the motor purging assembly comprises at least one purging pipeline, a hinge piece and a first driving piece, each purging pipeline comprises a first pipeline and a second pipeline, the first end of the first pipeline is communicated with an air supply component, and the second end of the second pipeline is communicated with a second pipeline; the second end of the first pipeline and the first end of the second pipeline are sealed and hinged, and the second end of the second pipeline is provided with at least one blowing nozzle; the driving end of the first driving part is connected with the first pipeline and is configured to drive the first pipeline to move so as to drive the second pipeline to rotate relative to the first pipeline by taking the hinging part as a fulcrum, so that the blowing nozzle blows air to the surface of the graphite electrode along with the moving path of the graphite electrode, and the cleaning effect of attachments on the surface of the graphite electrode is improved; the probability that attachments on the surface of the graphite electrode fall into a crucible mold is reduced, and the quality of a finished graphite crucible is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crucible manufacturing equipment, in particular to an electrode blowing assembly and a cooling mechanism. BACKGROUND

[0002] In the preparation process of a quartz crucible, the surface of a graphite electrode will generate attachments, which will affect the normal work of the graphite electrode; and under the influence of mechanical vibration, airflow and electric arc, the attachments on the surface of the graphite electrode will fall into the crucible mold, affecting the finished product quality of the quartz crucible, so the attachments on the graphite electrode need to be removed in time.

[0003] The existing way of removing the attachments on the surface of the graphite electrode is mostly to set a blowing assembly on the periphery of the graphite electrode, and to blow the surface of the graphite electrode by the blowing assembly to remove the attachments on the surface of the graphite electrode; but the graphite electrode needs to be opened and closed during work, and the blowing nozzle of the existing blowing assembly is usually fixedly arranged, which causes the existing blowing assembly to incompletely blow the surface of the graphite electrode, and the removal effect is not good. CONTENT OF THE INVENTION

[0004] The purpose of the present application is to provide an electrode blowing assembly to solve the problem that the existing blowing assembly incompletely blows the graphite electrode; and another purpose of the present application is to provide a cooling mechanism comprising the electrode blowing assembly.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] In a first aspect, the present application provides an electrode blowing assembly for blowing the surface of a graphite electrode, comprising at least one blowing pipeline, a hinged member and a first driving member, wherein:

[0007] Each blowing pipeline comprises a first pipeline and a second pipeline, the first end of the first pipeline is in communication with a gas supply component, the second end of the first pipeline is sealingly and hingedly connected to the first end of the second pipeline, and the second end of the second pipeline is provided with at least one blowing nozzle;

[0008] The hinged member is configured to mount the second pipeline on an external mechanism;

[0009] The driving end of the first driving member is connected to the first pipeline and is configured to drive the first pipeline to move, so as to drive the second pipeline to rotate relative to the first pipeline with the hinged member as a fulcrum, so that the blowing nozzle follows the movement path of the graphite electrode to blow the surface of the graphite electrode.

[0010] The electrode purging assembly drives the first pipeline to move through the first driving member, and then drives the second pipeline to rotate relative to the first pipeline with the hinge member as the fulcrum, so that the blowing nozzle on the second pipeline follows the movement path of the graphite electrode to blow the surface of the graphite electrode. Compared with the existing graphite electrode blowing method using a fixed blowing nozzle, the graphite electrode blowing method can follow the movement of the graphite electrode for follow-up purging, improve the removal effect of the surface attachments of the graphite electrode, reduce the probability of the surface attachments of the graphite electrode falling into the graphite crucible, and then improve the finished product quality of the graphite crucible.

[0011] Optionally, the electrode purging assembly further comprises a first connecting member, the driving end of the first driving member is fixedly connected with the first connecting member, and the first pipeline is fixedly connected with the first connecting member.

[0012] By arranging the first connecting member, the transmission connection between the first driving member and the first pipeline is realized, and then the first pipeline is driven to move through the first connecting member.

[0013] Optionally, the hinge member comprises a fixed part and a movable part, the fixed part is fixedly installed on the external mechanism, the movable part is rotatably installed on the fixed part, and the second pipeline is fixedly installed on the movable part.

[0014] By cooperating the fixed part and the movable part and fixing the second pipeline on the movable part, the rotation of the second pipeline relative to the fixed part is realized, and a hinge member with a simple structure is provided.

[0015] Optionally, the second end of the first pipeline and the first end of the second pipeline are sealingly and hingedly connected through a second connecting member.

[0016] By arranging the second connecting member, the sealing and hingedly connecting between the first pipeline and the second pipeline is realized.

[0017] Optionally, the blowing nozzle is installed on the second end of the second pipeline through a universal joint, and the universal joint is configured to adjust the blowing angle of the blowing nozzle.

[0018] By installing the blowing nozzle on the second pipeline through the universal joint, the blowing angle of the blowing nozzle can be flexibly adjusted, so that the blowing nozzle is at a suitable blowing angle.

[0019] In a second aspect, the application further provides a cooling mechanism, which comprises a cooling plate, a second driving member and at least one set of the electrode purging assembly.

[0020] The driving end of the second driving member is connected with the cooling plate and is configured to drive the cooling plate to lift and lower, the cooling plate is provided with a relief hole for the graphite electrode to pass through, the cooling plate is provided with a cooling channel, and a cooling medium is introduced into the cooling channel;

[0021] The electrode purging assembly is installed on the cooling plate.

[0022] The electrode blowing assembly proposed in the application can follow the movement of the graphite electrode to perform follow-up blowing, thereby improving the removal effect of the attachments on the surface of the graphite electrode; the cooling mechanism drives the cooling plate to rise and fall through the second driving member, and then adjusts the cooling plate to a proper distance from the opening of the crucible mold, which can effectively improve the splashing or lifting of the quartz sand when the graphite electrode is arcing, reduce the bubbling of the inner layer of the crucible, and effectively improve the finished product quality of the crucible through the arrangement of the electrode blowing assembly and the cooling plate.

[0023] Optionally, the cooling mechanism further comprises an auxiliary blowing unit or a surrounding fence.

[0024] When the cooling mechanism comprises the auxiliary blowing unit, the auxiliary blowing unit comprises a plurality of nozzles, the plurality of nozzles are uniformly arranged around the avoiding hole, and are configured to simultaneously spray air upward toward the central axis of the avoiding hole.

[0025] The plurality of nozzles simultaneously spray air upward toward the central axis of the avoiding hole, which can form a conical air curtain around the avoiding hole. When the electrode blowing assembly blows the attachments on the electrode, the lifted attachments have the risk of falling into the crucible mold below from the avoiding hole. The air curtain formed by the air sprayed by the plurality of nozzles can block the lifted attachments from falling into the crucible mold below, thereby further improving the finished product quality of the crucible.

[0026] When the cooling mechanism comprises the surrounding fence, the surrounding fence is arranged around the avoiding hole and extends upward by a predetermined height.

[0027] When the electrode blowing assembly blows the attachments on the electrode, the lifted attachments have the risk of falling into the crucible mold below from the avoiding hole. At this time, the surrounding fence extending upward by a predetermined height can block the lifted attachments from falling into the crucible mold below, thereby further improving the finished product quality of the crucible.

[0028] Optionally, the cooling mechanism further comprises a plurality of graphite electrodes, and the plurality of graphite electrodes can rise and fall relative to the cooling plate and open and close.

[0029] Each graphite electrode is electrically connected to the power supply component through a copper woven belt.

[0030] Compared with the copper wire connection mode, the copper woven belt is used to electrically connect the graphite electrode and the power supply component, which can avoid the pulling between the original copper wire and the opening and closing mechanism for controlling the graphite electrode, reduce the stress of the opening and closing mechanism, and prolong the service life of the opening and closing mechanism. In addition, the overall layout of the copper woven belt is neat, maintenance is convenient, and safety is high.

[0031] Optionally, the cooling channel comprises at least two independently arranged cooling flow channels, and one of the cooling flow channels is arranged around the avoiding hole.

[0032] By independently setting at least two cooling flow channels, and one of the cooling flow channels is arranged around the avoiding hole, the temperature of the avoiding hole which is relatively high can be rapidly cooled, in addition, the independently set cooling flow channels can shorten the length of a single cooling flow channel and can independently control the flow rate of the cooling medium in a single cooling flow channel, thereby improving the cooling effect of the cooling plate.

[0033] Optionally, the cooling mechanism further comprises a heat insulation unit, which is fixedly arranged at the side of the cooling plate and between the cooling plate and the second driving member, and is configured to provide heat insulation protection for the second driving member.

[0034] By arranging the heat insulation unit, heat insulation protection is provided for the second driving member, and the service life of the second driving member is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a structural schematic diagram of an electrode purging assembly provided by an embodiment of the present application;

[0036] Figure 2 is a three-dimensional structural schematic diagram of a cooling mechanism provided by an embodiment of the present application;

[0037] Figure 3 is a structural schematic diagram of a cooling flow channel of a cooling mechanism provided by an embodiment of the present application;

[0038] Figure 4 is an assembly schematic diagram of a cooling mechanism provided by an embodiment of the present application.

[0039] Figures 1 to 4 The following reference signs are included in the drawings:

[0040] Electrode purging assembly 10: purging pipeline 11, first pipeline 110, second pipeline 111, blowing nozzle 112, universal joint 113, hinged member 12, fixed part 120, movable part 121, first driving member 13, first connecting member 14, second connecting member 15;

[0041] Graphite electrode 20, copper braid 21;

[0042] Crucible mold 30;

[0043] Cooling plate 40: avoiding hole 41, cooling channel 42, cooling flow channel 420;

[0044] Second driving member 50: motor 51, transmission assembly 52, lifting lead screw 53, limiting member 54. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0046] In the preparation process of the quartz crucible, the surface of the graphite electrode will produce attachments, which will affect the normal work of the graphite electrode; and under the influence of mechanical vibration, airflow and electric arc, the attachments on the surface of the graphite electrode will fall into the crucible mold, affecting the finished product quality of the quartz crucible, so the attachments on the graphite electrode need to be removed in time.

[0047] At present, the existing graphite electrode surface attachment removal method is mostly to set a blowing assembly on the periphery of the graphite electrode, and to blow the surface of the graphite electrode through the blowing assembly to remove the attachments on the surface of the graphite electrode; but the graphite electrode needs to be implemented with opening and closing action in the working process, and the blowing nozzle of the existing blowing assembly is usually fixedly arranged, which causes the existing blowing assembly to not sweep the surface of the graphite electrode thoroughly, and the removal effect is not good.

[0048] Therefore, in the first aspect, the application provides an electrode blowing assembly, please refer to Figure 1 and Figure 4 The electrode blowing assembly 10 provided by the embodiments of the application is used for blowing the surface of the graphite electrode 20, which comprises at least one blowing pipeline 11, a hinged part 12 and a first driving part 13. Each blowing pipeline 11 comprises a first pipeline 110 and a second pipeline 111. The first end of the first pipeline 110 is connected with a gas supply part in communication. The second end of the first pipeline 110 is sealingly and hingedly connected with the first end of the second pipeline 111. The second end of the second pipeline 111 is provided with at least one blowing nozzle 112. The hinged part 12 is configured to mount the second pipeline 111 on an external mechanism. The driving end of the first driving part 13 is connected with the first pipeline 110 and is configured to drive the first pipeline 110 to move, so as to drive the second pipeline 111 to rotate relative to the first pipeline 110 with the hinged part 12 as a fulcrum, so that the blowing nozzle 112 follows the moving path of the graphite electrode 20 to blow the surface of the graphite electrode 20.

[0049] Specifically, the electrode blowing assembly 10 comprises two blowing pipelines 11 arranged at intervals, so as to expand the blowing area and improve the blowing effect on the graphite electrode 20.

[0050] It can be seen that the electrode blowing assembly 10 proposed by the application drives the first pipeline 110 to move through the first driving part 13, and then drives the second pipeline 111 to rotate relative to the first pipeline 110 with the hinged part 12 as a fulcrum, so that the blowing nozzle 112 on the second pipeline 111 blows the surface of the graphite electrode 20 along the moving path of the graphite electrode 20. Compared with the existing graphite electrode blowing method using a fixed blowing nozzle, the graphite electrode blowing method can follow the movement of the graphite electrode for blowing, improve the removal effect of the attachments on the surface of the graphite electrode 20, reduce the probability of the attachments on the surface of the graphite electrode 20 falling into the crucible mold 30, and then improve the finished product quality of the graphite crucible.

[0051] As an embodiment, the electrode purge assembly 10 further includes a first connecting member 14 , a driving end of the first driving member 13 is fixedly connected to the first connecting member 14 , and the first pipeline 110 is fixedly connected to the first connecting member 14 .

[0052] Specifically, the first driving member 13 adopts a stepping motor or a servo motor, which can be adjusted in real time and accurately controlled.

[0053] like Figure 1 As shown, the first driving member 13 drives the first connecting member 14 along the first direction ( Figure 1 The second pipeline 111 is mounted on the external mechanism via the hinge 12. Driven by the first pipeline 110, the second pipeline 111 rotates relative to the first pipeline 110 with the hinge 12 as a fulcrum, so that the blowing nozzle 112 on the second pipeline 111 follows the moving path of the graphite electrode 20 and blows air to the surface of the graphite electrode 20. Figure 1 Taking one of the second pipelines 111 as an example, two dotted lines indicate the range of rotation of the second pipeline 111 with the hinge 12 as the fulcrum.

[0054] It can be seen that by providing the first connecting member 14 , a transmission connection between the first driving member 13 and the first pipeline 110 is achieved, and then the first connecting member 14 drives the first pipeline 110 to move.

[0055] As an embodiment, the hinge 12 includes a fixed portion 120 and a movable portion 121 . The fixed portion 120 is fixedly mounted on the external mechanism. The movable portion 121 is rotatably mounted on the fixed portion 120 . The second pipeline 111 is fixedly mounted on the movable portion 121 .

[0056] It can be seen that by cooperating with the fixed portion 120 and the movable portion 121 and fixing the second pipeline 111 on the movable portion 121, the rotation of the second pipeline 111 relative to the fixed portion 120 is achieved, providing a hinge 12 with a simple structure.

[0057] As an embodiment, the second end of the first pipeline 110 and the first end of the second pipeline 111 are sealed and hingedly connected via a second connecting member 15 . The second connecting member 15 can be an adjustable spherical universal joint.

[0058] It can be seen that by providing the second connecting member 15 , a sealed connection between the first pipeline 110 and the second pipeline 111 is achieved.

[0059] As an embodiment, the blowing nozzle 112 is installed at the second end of the second pipeline 111 through a universal joint 113 , and the universal joint 113 is configured to adjust the blowing angle of the blowing nozzle 112 .

[0060] It can be seen that the blowing nozzle 112 is installed on the second pipeline 111 through the universal joint 113, and the blowing angle of the blowing nozzle 112 can be flexibly adjusted, so that the blowing nozzle 112 is at a suitable blowing angle.

[0061] In a second aspect, the application provides a cooling mechanism, please refer to 2 and Figure 4 As shown in the figure, the cooling mechanism provided by the embodiment of the application comprises a cooling plate 40, a second driving member 50, and at least one set of electrode blowing assembly 10. The driving end of the second driving member 50 is connected to the cooling plate 40 and is configured to drive the cooling plate 40 to rise and fall. The cooling plate 40 is provided with a relief hole 41 for the graphite electrode 20 to pass through. The cooling plate 40 is provided with a cooling channel 42 in which a cooling medium is introduced. The electrode blowing assembly 10 is installed on the cooling plate 40. Specifically, the cooling medium can be a cooling liquid (such as water) or a cooling gas (such as nitrogen), which is not limited in the embodiment of the application.

[0062] It can be seen that the electrode blowing assembly 10 provided by the application can follow the movement of the graphite electrode 20 for follow-up blowing, improving the removal effect of the adhering matter on the surface of the graphite electrode. The cooling mechanism drives the cooling plate 40 to rise and fall through the second driving member 50, and then adjusts the cooling plate 40 to a suitable distance from the opening of the crucible mold (the adjustment time and distance can be determined according to the raw material conditions and process parameters, etc.), which can effectively improve the splashing or lifting of quartz sand when the graphite electrode is arcing, reduce the bubbling of the inner layer of the crucible, and effectively improve the finished product quality of the crucible through the arrangement of the electrode blowing assembly 10 and the cooling plate 40.

[0063] As an optional implementation, Figure 2 Two sets of electrode blowing assemblies 10 are arranged in the center of the relief hole 41, which are symmetrically arranged. In this way, follow-up blowing can be achieved on both sides of the relief hole, and 360-degree blowing can be achieved outside the relief hole 41, so that the graphite electrode above the relief hole can be blown in all directions.

[0064] As an implementation, the cooling mechanism further comprises an auxiliary blowing unit (not shown in the figure). The auxiliary blowing unit comprises a plurality of nozzles, which are uniformly arranged around the relief hole 41 and are configured to simultaneously spray gas upward toward the central axis of the relief hole 41. The plurality of nozzles simultaneously spray gas upward toward the central axis of the relief hole 41, which can form a conical gas curtain around the relief hole 41. When the electrode blowing assembly 10 blows the adhering matter on the graphite electrode 20, the adhering matter that is lifted has the risk of falling from the relief hole 41 into the crucible mold below. The gas curtain formed by the plurality of nozzles can block the adhering matter from falling into the crucible mold below, further improving the finished product quality of the crucible.

[0065] The cooling mechanism further comprises a fence (not shown in the figure) arranged around the avoiding hole 41 and extending upward by a predetermined height. When the electrode blowing assembly 10 blows the attachments on the graphite electrode 20, the raised attachments have the risk of falling into the lower crucible mold from the avoiding hole 41. At this time, the fence extending upward by a predetermined height can block the raised attachments from falling into the lower crucible mold, further improving the finished product quality of the crucible.

[0066] As shown in Figure 4 As an embodiment, the cooling mechanism further comprises a plurality of graphite electrodes 20, which can be lifted and opened and closed relative to the cooling plate 40. Each graphite electrode 20 is electrically connected to the power supply component through a copper braid 21.

[0067] It can be seen that, compared with the copper wire connection mode, the copper braid 21 is used to electrically connect the graphite electrode 20 and the power supply component, which can avoid the pulling between the original copper wire and the opening and closing mechanism for controlling the graphite electrode 20, reduce the stress of the opening and closing mechanism, and prolong the service life of the opening and closing mechanism. In addition, the overall layout of the copper braid 21 is neat, easy to maintain, and high in safety.

[0068] As shown in Figure 3 and Figure 4 As an embodiment, the cooling channel 42 comprises at least two independently arranged cooling flow channels 420, and one of the cooling flow channels 420 is arranged around the avoiding hole 41.

[0069] Specifically, the cooling channel 42 comprises three independently arranged cooling flow channels 420, one of which is arranged around the avoiding hole 41, and the other two are arranged on both sides of the avoiding hole 41.

[0070] Specifically, the first end of each cooling flow channel 420 is provided with a water inlet joint, and the second end of each cooling flow channel 420 is provided with a water outlet joint.

[0071] It can be seen that, by independently arranging at least two cooling flow channels 420, and one of the cooling flow channels 420 is arranged around the avoiding hole 41, the temperature of the avoiding hole 41 which is relatively high can be quickly cooled. In addition, the independently arranged cooling flow channels 420 can shorten the length of a single cooling flow channel 420 and can independently control the flow rate of the cooling medium in a single cooling flow channel 420, thereby improving the cooling effect of the cooling plate 40.

[0072] As an embodiment, the cooling mechanism further comprises a heat insulation unit (not shown in the figure) fixedly arranged on the side of the cooling plate 40 and between the cooling plate 40 and the second driving member 50, configured to insulate and protect the second driving member 50.

[0073] Specifically, the heat insulation unit is a heat insulation plate vertically arranged between the cooling plate 40 and the second driving member 50.

[0074] By arranging the heat insulation unit, the heat insulation protection of the second driving member 50 is realized, and the service life of the second driving member 50 is prolonged.

[0075] As an implementation manner, the second driving member 50 includes two sets of driving assemblies, and the two sets of driving assemblies are arranged at opposite outer sides of the cooling plate 40. Each set of driving assembly includes a motor 51, a transmission assembly 52 and a lifting lead screw 53. The driving end of the motor 51 is in transmission connection with the lifting lead screw 53 through the transmission assembly 52. The motor 51 is configured to drive the lifting lead screw 53 to lift through the transmission assembly 52. The top end of the lifting lead screw 53 is connected to the cooling plate 40, so as to drive the cooling plate 40 to lift through the lifting of the lifting lead screw 53.

[0076] Of course, the second driving member 50 can also be an oil cylinder, an air cylinder, a linear module, a chain lifting module, a synchronous belt lifting module or a rack and pinion lifting module, etc.

[0077] As an implementation manner, the second driving member 50 further includes a limiting member 54, which is configured to limit the lifting stroke of the lifting lead screw 53.

[0078] Specifically, the limiting member 54 is any one of a contact sensor or a non-contact sensor arranged at a preset height in cooperation with the lifting lead screw 53.

[0079] The above examples only illustrate the basic principles and characteristics of the present application, and the present application is not limited by the above examples. Various changes and modifications of the present application can be made without departing from the spirit and scope of the present application, and these changes and modifications all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An electrode purge assembly for purging the surface of a graphite electrode, characterized in that: The electrode purge assembly includes at least one purge pipeline, a hinge and a first drive member, wherein: Each of the purge pipelines includes a first pipeline and a second pipeline, wherein the first end of the first pipeline is connected to the air supply component, the second end of the first pipeline is sealed and hingedly connected to the first end of the second pipeline, and the second end of the second pipeline is provided with at least one blowing nozzle; The hinge is configured to mount the second conduit on an external mechanism; The driving end of the first driving member is connected to the first pipeline and is configured to drive the first pipeline to move, thereby driving the second pipeline to rotate relative to the first pipeline with the hinge as a fulcrum, so that the blowing nozzle follows the moving path of the graphite electrode to blow air on the surface of the graphite electrode.

2. The electrode purge assembly according to claim 1, characterized in that: The electrode purge assembly further includes a first connecting member, a driving end of the first driving member is fixedly connected to the first connecting member, and the first pipeline is fixedly connected to the first connecting member.

3. The electrode purge assembly according to claim 1, characterized in that: The hinge comprises a fixed portion and a movable portion, the fixed portion is fixedly mounted on the external mechanism, the movable portion is rotatably mounted on the fixed portion, and the second pipeline is fixedly mounted on the movable portion.

4. The electrode purge assembly according to claim 1, characterized in that: The second end of the first pipeline is sealed and hingedly connected to the first end of the second pipeline through a second connecting piece.

5. The electrode purge assembly according to claim 1, characterized in that: The blowing nozzle is installed at the second end of the second pipeline through a universal joint, and the universal joint is configured to adjust the blowing angle of the blowing nozzle.

6. A cooling mechanism, characterized in that: The cooling mechanism comprises a cooling plate, a second driving member and at least one set of electrode purge assemblies according to any one of claims 1 to 5, wherein: The driving end of the second driving member is connected to the cooling plate and is configured to drive the cooling plate to move up and down. The cooling plate is provided with an avoidance hole for the graphite electrode to pass through. The cooling plate is provided with a cooling channel, and a cooling medium is passed through the cooling channel. The electrode purge assembly is mounted on the cooling plate.

7. The cooling mechanism according to claim 6, characterized in that: The cooling mechanism further includes an auxiliary purge unit or a barrier; When the cooling mechanism includes an auxiliary purge unit, the auxiliary purge unit includes a plurality of nozzles, the plurality of nozzles are evenly arranged around the avoidance hole and are configured to simultaneously spray upward toward the central axis of the avoidance hole; When the cooling mechanism includes a fence, the fence is arranged around the avoidance hole and extends upward to a predetermined height.

8. The cooling mechanism according to claim 6, characterized in that: The cooling mechanism further comprises a plurality of graphite electrodes, which can be raised and lowered and opened and closed relative to the cooling plate; Each of the graphite electrodes is electrically connected to a power supply component via a copper braided belt.

9. The cooling mechanism according to claim 6, wherein: The cooling channel includes at least two independently arranged cooling channels, and one of the cooling channels is arranged around the avoidance hole.

10. The cooling mechanism according to claim 6, wherein: The cooling mechanism further includes a heat insulation unit, which is fixedly arranged on a side of the cooling plate and located between the cooling plate and the second driving member, and is configured to provide heat insulation protection for the second driving member.

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