Vibration cooling device for bearing bush of steam turbine

Abstract

The utility model discloses a steam turbine bearing bush vibration cooling device, and belongs to the field of steam turbine bearing bush vibration detection devices.The steam turbine bearing bush vibration cooling device comprises a probe body, a wire is arranged on one side of the probe body, and the outer side of the probe body is fixedly sleeved with a cooling frame; air inlet connecting pipes and air outlet connecting pipes which are symmetrically distributed are arranged on the sides, close to the wire, of the cooling frame and the probe body, air outlet pipes and first air inlet pipes are arranged at the ends of the air outlet connecting pipes and the air inlet connecting pipes respectively, and splicing assemblies are arranged between the air outlet pipes and the first air inlet pipes and the air outlet connecting pipes and the air inlet connecting pipes in the same group. According to the utility model, the first air inlet pipe is connected with the air compressor in the prior art, compressed air is guided into the shell and the cooling frame of the probe body through the cooperation of the second air inlet pipe and the first air inlet pipe by the air compressor, and air with heat is discharged through the air outlet pipe, so that the effect of cooling the probe body can be achieved; and the probe body is prevented from being damaged due to high temperature.

Description

Technical Field

[0001] The present application relates to the field of turbine bearing vibration detection devices, and more specifically, to a turbine bearing vibration cooling device. Background Art

[0002] Steam turbine generator sets are key production equipment in power plants. Their operating conditions are directly related to safe production and the economic benefits of enterprises. Therefore, effective status detection and fault diagnosis are of great significance. Steam turbine generator sets are typical rotating machinery. Their bearing vibration signals are usually measured through bearing vibration probes. Vibration probes are important components for measuring the vibration of mechanical equipment. Their working conditions directly affect the safe operation of the equipment.

[0003] Some existing vibration probes are not equipped with cooling structures on the outside. The vibration probes may generate a lot of heat when in use. If the vibration probes are damaged due to excessive temperature, they will not be able to accurately monitor the vibration of the equipment, which may lead to equipment failure or even serious accidents. Therefore, in order to solve the above problems, we propose a turbine bearing vibration cooling device. Utility Model Content

[0004] In order to solve the above problems, the present application provides a turbine bearing vibration cooling device, which adopts the following technical solution:

[0005] A turbine bearing vibration cooling device comprises a probe body, a conducting wire is provided on one side of the probe body, a cooling frame is fixedly sleeved on the outer side of the probe body, the cooling frame and the probe body are both provided with an inlet connecting pipe and an outlet connecting pipe which are symmetrically distributed near the conducting wire, the ends of the outlet connecting pipe and the inlet connecting pipe are respectively provided with an outlet pipe and a first inlet pipe, a splicing assembly is provided between the outlet pipe and the first inlet pipe and the same group of outlet connecting pipes and inlet connecting pipes, the side wall of the conducting wire is sleeved with a mounting column, a placement block is fixedly installed on the side wall of the mounting column, and a cover plate is hingedly connected to the top of the placement block, an arc groove is provided on the opposite side of the cover plate and the placement block, and a filter pressure reducing valve is provided between the cover plate and the placement block, two two-way joints are fixedly installed at both ends of the filter pressure reducing valve, two of the first inlet pipes are fixedly connected to the opposite end of the two-way joints in the same group, and the other end of the two-way joints is fixedly connected to the second inlet pipe, and a fixing assembly is provided between the cover plate and the placement block.

[0006] By adopting the above technical solution, when the equipment is used, the staff places the filter pressure reducing valve in the arc groove opened on the opposite side of the placement block and the cover plate. Then, the staff flips the cover plate to make the cover plate fit with the top of the placement block, and splices the cover plate and the placement block through the fixing assembly, which can play the role of positioning and fixing the filter pressure reducing valve. Then, the staff fixes the first air inlet pipe and the air outlet pipe with the same group of air inlet connecting pipes and air outlet connecting pipes through the splicing assembly, which can play the role of fixing the first air inlet pipe and the air outlet pipe. The staff connects the two first air inlet pipes to the two-way joints on the same side, connects the second air inlet pipe to the other two-way joint, and makes the second air inlet pipe away from the filter pressure reducing valve. One end of the pressure valve is connected to an air compressor in the prior art, and air is compressed by the air compressor for refrigeration. The refrigerated air enters the second air inlet pipe, and the cold air enters the filter pressure reducing valve through a two-way joint. The filter pressure reducing valve filters impurities and water vapor in the cold air and can also regulate the pressure. The filtered cold air enters the probe body shell and the cooling frame respectively through the first air inlet pipe, which can cool the probe body and help prevent the probe body from being damaged by high temperature. The air with heat is discharged through the air outlet pipe, so that cold air is always maintained in the probe body shell and the cooling frame, which is beneficial to improving the cooling effect of the equipment.

[0007] Furthermore, the splicing assembly includes nuts sleeved on the side walls of the first air inlet pipe and the air outlet pipe, the side walls of the first air inlet pipe and the air outlet pipe close to one end of the probe body are fixedly sleeved with a retaining ring, the first air inlet pipe and the air outlet pipe close to one end of the probe body are fixedly installed with a cannula, and the side walls of the air outlet connecting pipe and the air inlet connecting pipe are provided with threaded teeth matching the nuts in the same group.

[0008] By adopting the above technical solution, the staff places the inserts installed at the ends of the first air inlet pipe and the air outlet pipe into the same group of air inlet connecting pipes and air outlet connecting pipes, and then rotates the nut to make the nut screw into the threaded threads opened on the outside of the air inlet connecting pipe and the air outlet connecting pipe, and blocks it with the retaining ring, so as to fix and splice the first air inlet pipe and the air outlet pipe.

[0009] Furthermore, the fixing assembly includes a card block fixedly installed on the bottom end of the cover plate, a card slot matching the card block is provided at the top of the placement block, a movable slot is provided on an inner wall on one side of the card slot, a fixing block is slidably installed in the movable slot, a spring is fixedly connected between the inner wall on the side of the fixing block away from the card block and opposite to the movable slot, a fixing slot matching the fixing block is provided on the side wall of the card block, a toggle rod is fixedly installed on the side of the fixing block away from the filter pressure reducing valve, and the toggle rod slides through the movable slot at one end away from the fixed block.

[0010] By adopting the above technical scheme, the staff places the filter pressure reducing valve in the arc groove opened on the opposite side of the placement block and the cover plate, and then the staff flips the cover plate to make the cover plate fit with the top of the placement block, and moves the clamping block installed at the end of the cover plate into the clamping groove opened on the top of the placement block, and the clamping block pushes the fixed block to slide into the movable groove, and the fixed block pushes the spring to contract. When the clamping block is completely engaged with the clamping groove, the fixed block returns to its original position under the elastic force of the spring, and the end of the fixed block is engaged with the fixed groove opened on the side wall of the clamping block, which can play the role of fixing the clamping block, and then play the role of splicing the cover plate and the placement block. The arc groove is provided with a rubber pad to protect the filter pressure reducing valve. When the filter pressure reducing valve needs to be removed, the staff pulls the fixed block to slide into the movable groove by the toggle rod to disengage the fixed block from the clamping block, and then the cover plate can be flipped to disengage from the placement block, thereby achieving the effect of removing the filter pressure reducing valve.

[0011] Furthermore, the top and bottom of the fixed block away from the clamping block are fixedly installed with limit blocks, and the top inner wall and the bottom inner wall of the movable groove are provided with limit grooves matching the limit blocks of the same group.

[0012] By adopting the above technical solution, when the fixed block slides in the movable groove, the fixed block slides in the limiting groove with the limiting block. The cooperation between the limiting block and the limiting groove helps to prevent the fixed block from leaving the movable groove and helps to maintain the sliding stability of the fixed block.

[0013] Furthermore, the side wall of the wire is provided with a rubber sleeve distributed in a linear array, and two symmetrically distributed support rings are fixedly installed on the side wall of the rubber sleeve, and the cross-section of the support ring is a double hole, and the first air inlet pipe, the air outlet pipe and the second air inlet pipe are all located in the support ring on the same side.

[0014] By adopting the above technical solution, the side wall of the wire is provided with a rubber sleeve, and the rubber sleeve side wall support ring facilitates the placement of the first air inlet pipe, the air outlet pipe and the second air inlet pipe, which helps to avoid entanglement between the first air inlet pipe, the air outlet pipe and the second air inlet pipe.

[0015] Furthermore, shock absorbing blocks distributed in a ring array are fixedly installed on the outside of the cooling frame, and a protective plate is fixedly installed on the side of the shock absorbing blocks away from the cooling frame.

[0016] By adopting the above technical solution, the outer side of the cooling frame plays a role of protecting the cooling frame through the arrangement of multiple groups of shock-absorbing blocks and protective plates, and further plays a role of protecting the probe body.

[0017] Furthermore, a heat-conducting ring is provided on the fixed sleeve outside the probe body, and the heat-conducting ring is located in the cooling frame.

[0018] By adopting the above technical solution, the heat dissipation is accelerated by setting the heat conduction ring on the outer side of the probe body.

[0019] In summary, this application includes the following beneficial technical effects:

[0020] (1) In the utility model, the first air inlet pipe is connected to the air compressor of the prior art. The compressed air of the air compressor is introduced into the shell and cooling frame of the probe body through the cooperation of the second air inlet pipe and the first air inlet pipe, and the air with heat is discharged through the air outlet pipe, which can play a role in cooling the probe body, helping to avoid damage to the probe body due to high temperature and facilitating subsequent continuous use.

[0021] (2) In the present invention, a filter pressure reducing valve is provided between the first air inlet pipe and the second air inlet pipe to filter compressed air impurities and water vapor, thereby helping to prevent water vapor from entering the interior of the probe body and facilitating the subsequent stable use of the probe body.

[0022] (3) In the present invention, the filter pressure reducing valve is placed in an arc groove opened on one side of the placement block and the cover plate, and the cover plate and the placement block are spliced ​​by a fixing assembly, so as to fix the filter pressure reducing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a turbine bearing vibration cooling device;

[0024] Figure 2 It is a cross-sectional view of the utility model;

[0025] Figure 3 For this utility model Figure 2 A magnified view of middle;

[0026] Figure 4 For this utility model Figure 2 Enlarged view of B.

[0027] Description of the numbers in the figure:

[0028] 1. Probe body; 2. Cooling frame; 3. Protective plate; 4. Nut; 5. First air inlet pipe; 6. Two-way connector; 7. Placement block; 8. Slot; 9. Block; 10. Cover plate; 11. Filter pressure reducing valve; 12. Mounting column; 13. Second air inlet pipe; 14. Support ring; 15. Rubber sleeve; 16. Wire; 17. Air outlet pipe; 18. Fixing block; 19. Spring; 20. Movable slot; 21. Intubation tube. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0030] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] See also Figure 1-4A turbine bearing vibration cooling device comprises a probe body 1, a conductor 16 is arranged on one side of the probe body 1, a cooling frame 2 is fixedly sleeved on the outer side of the probe body 1, an air inlet connecting pipe and an air outlet connecting pipe are symmetrically arranged on the cooling frame 2 and the probe body 1 near the side of the conductor 16, an air outlet pipe 17 and a first air inlet pipe 5 are arranged at the ends of the air outlet connecting pipe and the air inlet connecting pipe, respectively, a splicing assembly is arranged between the air outlet connecting pipe 17 and the first air inlet connecting pipe 5 and the same group of air outlet connecting pipes and air inlet connecting pipes, the splicing assembly comprises a nut 4 sleeved on the side walls of the first air inlet pipe 5 and the air outlet pipe 17, the first air inlet pipe 5 and the air outlet pipe 17 are connected to each other, and the air outlet connecting pipe 17 is connected to the first air inlet pipe 5 and the air outlet pipe 17. A retaining ring is fixedly mounted on the side wall near one end of the probe body 1, and a plug 21 is fixedly installed on the first air inlet pipe 5 and the air outlet pipe 17 near one end of the probe body 1. The side walls of the air outlet connecting pipe and the air inlet connecting pipe are provided with threaded teeth matching the nut 4 of the same group. When the equipment is in use, the staff places the plug 21 installed at the ends of the first air inlet pipe 5 and the air outlet pipe 17 into the air inlet connecting pipe and the air outlet connecting pipe of the same group, and then rotates the nut 4 to make the nut 4 screwed into the threaded teeth provided on the outside of the air inlet connecting pipe and the air outlet connecting pipe, and the retaining ring is used to block the first air inlet pipe 5 and the air outlet pipe 17, so as to fix and splice the first air inlet pipe 5 and the air outlet pipe 17.

[0034] The side wall of the wire 16 is sleeved with rubber sleeves 15 distributed in a linear array, and two symmetrically distributed support rings 14 are fixedly installed on the side wall of the rubber sleeve 15, and the cross-section of the support ring 14 is a double hole. The first air inlet pipe 5, the air outlet pipe 17 and the second air inlet pipe 13 are all located in the support ring 14 on the same side. The side wall of the wire 16 is arranged through the rubber sleeve 15, and the side wall support ring 14 of the rubber sleeve 15 is convenient for placing the first air inlet pipe 5, the air outlet pipe 17 and the second air inlet pipe 13, which helps to avoid entanglement between the first air inlet pipe 5, the air outlet pipe 17 and the second air inlet pipe 13.

[0035] The side wall of the wire 16 is sleeved with a mounting column 12, and a placement block 7 is fixedly installed on the side wall of the mounting column 12, and a cover plate 10 is hinged on the top of the placement block 7, and an arc groove is provided on the opposite side of the cover plate 10 and the placement block 7, and a filter pressure reducing valve 11 is provided between the cover plate 10 and the placement block 7, and two-way joints 6 are fixedly installed at both ends of the filter pressure reducing valve 11, two first air inlet pipes 5 are fixedly connected to the opposite end of the same group of two-way joints 6, and the other end of the two-way joint 6 is fixedly connected to the second air inlet pipe 13, and a fixing component is provided between the cover plate 10 and the placement block 7, and a fixing component is provided between the cover plate 10 and the placement block 7. The component includes a card block 9 fixedly installed at the bottom end of the cover plate 10, a card slot 8 matching the card block 9 is opened on the top of the placement block 7, a movable slot 20 is opened on the inner wall of one side of the card slot 8, a fixed block 18 is slidably installed in the movable slot 20, a spring 19 is fixedly connected between the inner wall of the fixed block 18 on the side away from the card block 9 and opposite to the movable slot 20, a fixed slot matching the fixed block 18 is opened on the side wall of the card block 9, a toggle rod is fixedly installed on the side of the fixed block 18 away from the filter pressure reducing valve 11, and the end of the toggle rod away from the fixed block 18 slides through the movable slot 20.

[0036] The staff places the filter pressure reducing valve 11 in the arc groove opened on the opposite side of the placement block 7 and the cover plate 10. Then, the staff flips the cover plate 10 to make the cover plate 10 fit with the top of the placement block 7, and moves the block 9 installed at the end of the cover plate 10 into the slot 8 opened at the top of the placement block 7. The block 9 pushes the fixed block 18 to slide into the movable slot 20, and the fixed block 18 pushes the spring 19 to contract. When the block 9 is completely engaged with the slot 8, the fixed block 18 returns to its original position under the elastic force of the spring 19, and the end of the fixed block 18 is engaged with the fixed groove opened on the side wall of the block 9, which can play the role of fixing the block 9, and then play the role of splicing the cover plate 10 and the placement block 7. The arc groove is provided with a rubber pad to protect the filter pressure reducing valve 11.

[0037] After the filter pressure reducing valve 11 is placed, the staff connects the two first air inlet pipes 5 to the two-way joints 6 on the same side, connects the second air inlet pipe 13 to the other two-way joint 6, and connects the second air inlet pipe 13 to the air compressor in the prior art at one end away from the filter pressure reducing valve 11. The air is compressed by the air compressor for refrigeration, and the refrigerated air enters the second air inlet pipe 13, and the cold air enters the filter pressure reducing valve 11 through the two-way joint 6. The filter pressure reducing valve 11 plays a role in filtering impurities and water vapor in the cold air and can also play a role in regulating the pressure. The filtered cold air enters the probe body 1 shell and the cooling frame 2 respectively through the first air inlet pipe 5, which can play a role in cooling the probe body 1, which helps to prevent the probe body 1 from being damaged by high temperature, and the air with heat is discharged through the air outlet pipe 17, so that there is always cold air in the probe body 1 shell and the cooling frame 2, which is beneficial to improving the cooling effect of the equipment.

[0038] When the filter pressure reducing valve 11 needs to be disassembled, the staff pulls the fixed block 18 to slide into the movable groove 20 by the toggle rod, so that the fixed block 18 and the clamping block 9 are disengaged, and then the cover plate 10 can be flipped and disengaged from the placement block 7, so that the filter pressure reducing valve 11 can be disassembled.

[0039] Limit blocks are fixedly installed on the top and bottom of the end of the fixed block 18 away from the clamping block 9, and the inner walls of the top and bottom ends of the movable groove 20 are provided with limit grooves matching the limit blocks of the same group. When the fixed block 18 slides in the movable groove 20, the fixed block 18 slides in the limit groove with the limit block. The cooperation between the limit block and the limit groove helps to prevent the fixed block 18 from detaching from the movable groove 20 and helps to maintain the sliding stability of the fixed block 18.

[0040] Shock-absorbing blocks distributed in a circular array are fixedly installed on the outside of the cooling frame 2, and a protective plate 3 is fixedly installed on the side of the shock-absorbing blocks away from the cooling frame 2. The outside of the cooling frame 2 plays a role of protecting the cooling frame 2 and further plays a role of protecting the probe body 1 through the arrangement of multiple groups of shock-absorbing blocks and protective plates 3. A heat-conducting ring is fixedly provided on the outside of the probe body 1, and the heat-conducting ring is located in the cooling frame 2. The heat dissipation on the outside of the probe body 1 is accelerated by the arrangement of the heat-conducting ring.

[0041] The implementation principle of the embodiment of the present application is as follows: when the device is used, the staff places the filter pressure reducing valve 11 in the arc groove opened on the opposite side of the placement block 7 and the cover plate 10. Then, the staff turns over the cover plate 10 to make the cover plate 10 fit with the top of the placement block 7, and splices the cover plate 10 and the placement block 7 through a fixing assembly, which can play the role of positioning and fixing the filter pressure reducing valve 11. Then, the staff fixes the first air inlet pipe 5 and the air outlet pipe 17 with the same group of air inlet connecting pipes and air outlet connecting pipes through a splicing assembly, which can play the role of fixing the first air inlet pipe 5 and the air outlet pipe 17. The staff connects the two first air inlet pipes 5 to the two-way joints 6 on the same side, connects the second air inlet pipe 13 to another two-way joint 6, and makes the second air inlet pipe 1 The end away from the filter pressure reducing valve 11 is connected to an air compressor in the prior art. The air is compressed by the air compressor for refrigeration. The refrigerated air enters the second air inlet pipe 13. The cold air enters the filter pressure reducing valve 11 through the two-way joint 6. The filter pressure reducing valve 11 plays a role in filtering impurities and water vapor in the cold air and can also play a role in regulating the pressure. The filtered cold air enters the shell of the probe body 1 and the cooling frame 2 respectively through the first air inlet pipe 5, which can play a role in cooling the probe body 1, which helps to prevent the probe body 1 from being damaged by high temperature. The air with heat is discharged through the air outlet pipe 17, so that the shell of the probe body 1 and the cooling frame 2 always keep cold air, which is beneficial to improving the cooling effect of the equipment.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A turbine bearing vibration cooling device, comprising a probe body (1), characterized in that: A conductor (16) is provided on one side of the probe body (1); a cooling frame (2) is fixedly sleeved on the outer side of the probe body (1); the cooling frame (2) and the probe body (1) are both provided with symmetrically distributed air inlet connecting pipes and air outlet connecting pipes on the side close to the conductor (16); an air outlet pipe (17) and a first air inlet pipe (5) are provided at the ends of the air outlet connecting pipe and the air inlet connecting pipe, respectively; a splicing assembly is provided between the air outlet pipe (17) and the first air inlet pipe (5) and the same group of air outlet connecting pipes and air inlet connecting pipes; a mounting column (12) is sleeved on the side wall of the conductor (16); and the side wall of the mounting column (12) is fixedly sleeved. A placement block (7) is installed, and a cover plate (10) is hinged on the top of the placement block (7), an arc groove is provided on the opposite side of the cover plate (10) and the placement block (7), and a filter pressure reducing valve (11) is provided between the cover plate (10) and the placement block (7), two-way joints (6) are fixedly installed at both ends of the filter pressure reducing valve (11), two of the first air intake pipes (5) are fixedly connected to the opposite end of the two-way joints (6) in the same group, and the other end of the two-way joint (6) is fixedly connected to the second air intake pipe (13), and a fixing component is provided between the cover plate (10) and the placement block (7).

2. A turbine bearing vibration cooling device according to claim 1, characterized in that: The splicing assembly comprises a nut (4) sleeved on the side walls of the first air inlet pipe (5) and the air outlet pipe (17); a retaining ring is fixedly sleeved on the side walls of the first air inlet pipe (5) and the air outlet pipe (17) at one end close to the probe body (1); a cannula (21) is fixedly installed on the end of the first air inlet pipe (5) and the air outlet pipe (17) close to the probe body (1); and the side walls of the air outlet connecting pipe and the air inlet connecting pipe are provided with threaded teeth matching the nut (4) of the same group.

3. A turbine bearing vibration cooling device according to claim 1, characterized in that: The fixing assembly comprises a clamping block (9) fixedly mounted on the bottom end of the cover plate (10); a clamping groove (8) matching the clamping block (9) is provided at the top end of the placement block (7); a movable groove (20) is provided on one inner wall of the clamping groove (8); a fixing block (18) is slidably mounted in the movable groove (20); a spring (19) is fixedly connected between the inner wall of the side of the fixing block (18) away from the clamping block (9) and opposite to the movable groove (20); a fixing groove matching the fixing block (18) is provided on the side wall of the clamping block (9); a toggle rod is fixedly mounted on the side of the fixing block (18) away from the filter pressure reducing valve (11); and the end of the toggle rod away from the fixing block (18) slides through the movable groove (20).

4. A turbine bearing vibration cooling device according to claim 3, characterized in that: Limit blocks are fixedly mounted on the top and bottom of one end of the fixed block (18) away from the clamping block (9), and the top inner wall and the bottom inner wall of the movable groove (20) are provided with limit grooves matching the limit blocks of the same group.

5. The turbine bearing vibration cooling device according to claim 1, characterized in that: The side wall of the wire (16) is sleeved with a rubber sleeve (15) distributed in a linear array, and the side wall of the rubber sleeve (15) is fixedly mounted with two symmetrically distributed support rings (14), and the cross section of the support ring (14) is a double hole, and the first air inlet pipe (5), the air outlet pipe (17) and the second air inlet pipe (13) are all located in the support ring (14) on the same side.

6. A turbine bearing vibration cooling device according to claim 1, characterized in that: Shock-absorbing blocks distributed in a ring array are fixedly mounted on the outside of the cooling frame (2), and a protective plate (3) is fixedly mounted on the side of the shock-absorbing blocks away from the cooling frame (2).

7. The turbine bearing vibration cooling device according to claim 1, characterized in that: A heat-conducting ring is provided on the fixed sleeve outside the probe body (1), and the heat-conducting ring is located inside the cooling frame (2).

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