Protective device of speed reducer for working in deep well

Abstract

The invention relates to the technical field of speed reducers, in particular to a protection device of a speed reducer for working in a deep well, which comprises a bearing seat, a sealing assembly and a protection assembly, a first flange is arranged on the bearing seat, a second flange is attached to the right end of the first flange, and a plurality of locking bolts are arranged between the first flange and the second flange; a second shell is arranged at the left end of the bearing seat, a first shell is arranged at the left end of the second shell, a base is arranged at the left end of the first shell, a plurality of supporting blocks are arranged at the left end of the base, and a plurality of fixing seats are arranged at the left end of the base. The lower end of the fixing seat is attached to the base, the first shell, the second shell and the bearing seat, and a protection assembly is arranged on the fixing seat. When the device is used, the locking bolt can be conveniently sealed and protected through the arranged sealing assembly, the situation that the locking bolt is exposed outside for a long time to be rusted, and later dismounting and overhauling are affected is avoided, and the overhauling and maintaining convenience of workers is improved.

Description

Technical Field

[0001] The invention relates to the technical field of reducers, in particular to a protective device for a reducer used in deep well work. Background Art

[0002] Due to the great depth of deep wells and the low level of groundwater (oil), deep well pumps are required to deliver sufficiently large torque to the screw. Due to the narrow inner diameter of deep wells, traditional reducers are difficult to match with deep well pumps and arrange them stably in a narrow space. It is also difficult to provide a large torque to the screw through the reducer, and it is difficult to raise the groundwater (oil) with a low level to a sufficiently large head and output it to the surface.

[0003] When the existing reducer is in use, the locking bolt is indeed sealed, and it is easy to rust when exposed to the outside for a long time, which affects the later disassembly and maintenance. In addition, when the reducer is descending, the shell is easy to collide with the well wall and cause damage. Therefore, the present invention provides a protective device for a reducer for deep well work to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a protective device for a reducer used in deep well work, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A protective device for a reducer for deep well work, comprising a bearing seat, a sealing assembly and a protective assembly, wherein the bearing seat is provided with a first flange, the right end of the first flange is fitted with a second flange, a plurality of locking bolts are provided between the first flange and the second flange, and a sealing assembly is provided at the right end of the bearing seat corresponding to the locking bolts, the left end of the bearing seat is provided with a second shell, the left end of the second shell is provided with a first shell, the left end of the first shell is provided with a base, the left end of the base is provided with a plurality of support blocks, the left end of the base is provided with a plurality of fixing seats, the lower end of the fixing seat is fitted with the base, the first shell, the second shell and the bearing seat, a protective assembly is provided on the fixing seat, and an expansion assembly is provided at the left end of the fixing seat.

[0006] As a further solution of the present invention, the protective assembly includes a first slide groove, a first slider, a second spring and a protective plate. The end of the fixed seat away from the first shell is slidably connected to the first slider. The other end of the first slider is provided with a protective plate, and a first slide groove is provided on the fixed seat corresponding to the first slider. The first shell, the second shell and the bearing seat can be protected by the provided protective plate to prevent the reducer from colliding with the well wall during the descent and causing damage, thereby improving the service life.

[0007] As a further solution of the present invention, a plurality of second springs are provided in the first slide groove, one end of the second spring is fixedly connected to the first slide groove, and the other end of the second spring is fixedly connected to the first slider, so that the elastic potential energy of the arranged second spring can provide a buffering effect to the protective plate.

[0008] As a further scheme of the present invention, the expansion component includes a second slide groove, a second slider, a cylinder, a connecting plate, a probe and an arc plate. The left end of the fixed seat is slidably connected to the second slider, and the left end of the fixed seat is provided with a second slide groove corresponding to the second slider. The upper end of the second slider is provided with a cylinder, and the other end of the cylinder is fixedly connected to the second slide groove. The left end of the second slider is provided with a connecting plate, the left end of the connecting plate is provided with a probe, and the left end of the connecting plate is also provided with an arc plate. When the reducer is in the process of descending, the path of the descent process can be observed through the arranged probe. When an obstacle is found, the cylinder is started to drive the second slider, the connecting plate and the arc plate to expand outward, and the arc plate thereby pushes away the obstacle to ensure smooth descent of the reducer.

[0009] As a further solution of the present invention, the sealing assembly includes a sealing cover, a first sleeve is symmetrically provided at the front and rear ends of the right end of the bearing seat, the right end of the first sleeve is slidably connected to the moving block, the right end of the moving block is provided with a sealing cover, the right end of the sealing cover is fitted with the first flange, and the locking bolt is sealed and protected by the sealing cover to prevent the locking bolt from being exposed to the outside for a long time and rusting, which affects the subsequent disassembly and maintenance, thereby improving the convenience of inspection and maintenance for the staff.

[0010] As a further scheme of the present invention, a first bearing is provided at the right end of the bearing seat, and a threaded rod is provided at the right end of the first bearing, which is threadedly connected to the moving block, and a first bevel gear is provided on the threaded rod. The upper end of the first bevel gear is engaged with the second bevel gear, and the upper end of the second bevel gear is provided with a first rotating rod that passes through the first sleeve, and the first rotating rod is provided with a second bearing fixedly connected to the first sleeve. By rotating the first rotating rod, the second bevel gear can be driven to rotate, and the second bevel gear thereby drives the first bevel gear and the threaded rod to rotate, and the threaded rod thereby drives the moving block and the sealing cover to move toward the locking bolt position.

[0011] As a further scheme of the present invention, a third bevel gear is provided at the upper end of the first rotating rod, and the fourth bevel gear is meshed on the third bevel gear. A second rotating rod is provided at one end of the two fourth bevel gears close to each other, and a rotating sleeve is provided on the second rotating rod. A limiting assembly is provided at the right end of the bearing seat corresponding to the rotating sleeve. A fixed cover is provided at the upper end of the first sleeve corresponding to the first rotating rod, the third bevel gear and the fourth bevel gear. The second rotating rod passes through the fixed cover, and the second rotating rod is provided with a third bearing fixedly connected to the inner wall of the fixed cover. The second rotating rod and the fourth bevel gear are driven to rotate by rotating the rotating sleeve, and the fourth bevel gear thereby drives the third bevel gear, the first rotating rod and the second bevel gear to rotate.

[0012] As a further solution of the present invention, the limit assembly includes a limit block, a limit groove, a connecting rod, a second sleeve, a first spring and a fixed block. The limit block is clamped on the rotating sleeve, and a number of limit grooves corresponding to the limit block are provided on the rotating sleeve. A connecting rod is provided at the upper end of the limit block, and the second sleeve is sleeved on the connecting rod. A fixed block is provided at the upper end of the second sleeve, and the left end of the fixed block is fixedly connected to the bearing seat. The limit block is separated from the limit groove by pulling the connecting rod upward, thereby facilitating the rotation of the rotating sleeve.

[0013] As a further solution of the present invention, a first spring is provided in the second sleeve, the upper end of the first spring is fixedly connected to the top end of the second sleeve, and the lower end of the first spring is fixedly connected to the connecting rod. The elastic potential energy of the first spring is convenient for driving the limit block to return to its original position, and the limit block is thereby inserted into the limit groove. The limit block thereby limits the rotating sleeve and the second rotating rod to prevent the second rotating rod from rotating and causing the sealing cover to loosen.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. When the present invention is used, the provided sealing assembly facilitates sealing and protecting the locking bolts, thereby preventing the locking bolts from being exposed to the outside for a long time and rusting, which may affect the later disassembly and maintenance, thereby improving the convenience of maintenance and repair for the staff.

[0015] 2. When the present invention is used, the protective assembly is provided to protect the first housing, the second housing and the bearing seat during the descent of the reducer, thereby preventing the reducer from colliding with the well wall during the descent and causing damage, thereby increasing the service life.

[0016] 3. When the present invention is used, when the reducer is in the process of descending, the expansion component can be arranged to push away obstacles in the descending path during the descending process, thereby ensuring smooth descent of the reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic diagram of the structure of a protective device for a reducer used in deep well work.

[0018] Figure 2 The figure is a schematic diagram of the cross-sectional structure of a protective device for a reducer used in deep well work.

[0019] Figure 3 A protective device for a reducer used in deep well work Figure 2 Schematic diagram of the left side.

[0020] Figure 4 A protective device for a reducer used in deep well work Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0021] Figure 5 A protective device for a reducer used in deep well work Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0022] Figure 6 A protective device for a reducer used in deep well work Figure 3 Schematic diagram of the enlarged structure at point C in the middle.

[0023] In the figure: 1, bearing seat; 101, first flange; 2, second flange; 201, locking bolt; 3, first housing; 4, second housing; 5, base; 501, support block; 6, sealing assembly; 601, sealing cover; 602, first sleeve; 603, moving block; 604, first bearing; 605, threaded rod; 606, first bevel gear; 607, second bevel gear; 608, first rotating rod; 609, second bearing; 610, fixed cover; 611, third bevel gear; 612, fourth bevel gear; 613, second rotating rod ; 614, the third bearing; 615, the rotating sleeve; 7, the limiting assembly; 701, the limiting block; 702, the limiting groove; 703, the connecting rod; 704, the second sleeve; 705, the first spring; 706, the fixing block; 8, the fixing seat; 9, the protective assembly; 901, the first slide groove; 902, the first slider; 903, the second spring; 904, the protective plate; 10, the expansion assembly; 1001, the second slide groove; 1002, the second slider; 1003, the cylinder; 1004, the connecting plate; 1005, the probe; 1006, the arc plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0025] In the present invention, the word "exemplary" is used to mean "used as an example, illustration or description". Any embodiment described as "exemplary" in the present invention is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present invention.

[0026] Example See also Figures 1 to 6 In an embodiment of the present invention, a protective device for a reducer for deep well work includes a bearing seat 1, a sealing assembly 6 and a protective assembly 9. The bearing seat 1 is provided with a first flange 101, and the right end of the first flange 101 is fitted with a second flange 2. A plurality of locking bolts 201 are provided between the first flange 101 and the second flange 2, and a sealing assembly 6 is provided at the right end of the bearing seat 1 corresponding to the locking bolts 201. The left end of the bearing seat 1 is provided with a second shell 4, the left end of the second shell 4 is provided with a first shell 3, the left end of the first shell 3 is provided with a base 5, and the left end of the base 5 is provided with a plurality of support blocks 501. The left end of the base 5 is provided with a plurality of fixing seats 8, and the lower end of the fixing seat 8 is fitted with the base 5, the first shell 3, the second shell 4 and the bearing seat 1, and the fixing seat 8 is provided with a protective assembly 9, and the left end of the fixing seat 8 is provided with an expansion assembly 10.

[0027] Specifically, the sealing component 6 is provided to facilitate sealing and protecting the locking bolt 201, so as to prevent the locking bolt 201 from being exposed to the outside for a long time and rusting, which may affect the subsequent disassembly and maintenance, thereby improving the convenience of inspection and maintenance for the staff; the protective component 9 is provided to protect the first shell 3, the second shell 4 and the bearing seat 1 during the descent of the reducer, so as to prevent the reducer from colliding with the well wall during the descent and causing damage, thereby improving the service life; when the reducer is in the descent process, the expansion component 10 is provided to push away obstacles that appear in the descent path during the descent process, thereby ensuring the smooth descent of the reducer.

[0028] The sealing assembly 6 includes a sealing cover 601 , and a first sleeve 602 is symmetrically arranged at the front and rear ends of the right end of the bearing seat 1 . The right end of the first sleeve 602 is slidably connected to a moving block 603 . The right end of the moving block 603 is provided with a sealing cover 601 , and the right end of the sealing cover 601 is in contact with the first flange 101 .

[0029] Specifically, the locking bolt 201 is sealed and protected by the provided sealing cover 601, so as to prevent the locking bolt 201 from being exposed to the outside for a long time and rusting, which may affect the subsequent disassembly and maintenance, thereby improving the convenience of maintenance and repair for the staff.

[0030] A first bearing 604 is provided at the right end of the bearing seat 1, and a threaded rod 605 is provided at the right end of the first bearing 604. The threaded rod 605 is threadedly connected to the moving block 603. A first bevel gear 606 is provided on the threaded rod 605. The upper end of the first bevel gear 606 is meshed with a second bevel gear 607. The upper end of the second bevel gear 607 is provided with a first rotating rod 608 that passes through the first sleeve 602. The first rotating rod 608 is provided with a second bearing 609 fixedly connected to the first sleeve 602.

[0031] Specifically, by rotating the first rotating rod 608 , the second bevel gear 607 is driven to rotate, and the second bevel gear 607 drives the first bevel gear 606 and the threaded rod 605 to rotate, and the threaded rod 605 drives the moving block 603 and the sealing cover 601 to move toward the locking bolt 201 .

[0032] A third bevel gear 611 is provided at the upper end of the first rotating rod 608, and the fourth bevel gear 612 is meshed on the third bevel gear 611. A second rotating rod 613 is provided at one end of the two fourth bevel gears 612 that are close to each other. A rotating sleeve 615 is provided on the second rotating rod 613, and a limiting assembly 7 is provided at the right end of the bearing seat 1 corresponding to the rotating sleeve 615. A fixed cover 610 is provided at the upper end of the first sleeve 602 corresponding to the first rotating rod 608, the third bevel gear 611 and the fourth bevel gear 612. The second rotating rod 613 penetrates the fixed cover 610, and a third bearing 614 fixedly connected to the inner wall of the fixed cover 610 is provided on the second rotating rod 613.

[0033] Specifically, the second rotating rod 613 and the fourth bevel gear 612 are driven to rotate by rotating the rotating sleeve 615, and the fourth bevel gear 612 thereby drives the third bevel gear 611, the first rotating rod 608 and the second bevel gear 607 to rotate.

[0034] The limiting assembly 7 includes a limiting block 701, a limiting groove 702, a connecting rod 703, a second sleeve 704, a first spring 705 and a fixed block 706. The limiting block 701 is clamped on the rotating sleeve 615, and a plurality of limiting grooves 702 are provided on the rotating sleeve 615 corresponding to the limiting block 701. A connecting rod 703 is provided at the upper end of the limiting block 701, and a second sleeve 704 is sleeved on the connecting rod 703. A fixed block 706 is provided at the upper end of the second sleeve 704, and the left end of the fixed block 706 is fixedly connected to the bearing seat 1.

[0035] Specifically, the connection rod 703 is pulled upward to separate the limiting block 701 from the limiting groove 702 , thereby facilitating the rotation of the rotating sleeve 615 .

[0036] A first spring 705 is disposed in the second sleeve 704 . The upper end of the first spring 705 is fixedly connected to the top end of the second sleeve 704 , and the lower end of the first spring 705 is fixedly connected to the connecting rod 703 .

[0037] Specifically, the elastic potential energy of the first spring 705 is convenient for driving the limit block 701 to return to its original position, so that the limit block 701 is inserted into the limit groove 702. The limit block 701 limits the rotating sleeve 615 and the second rotating rod 613 to prevent the second rotating rod 613 from rotating and causing the sealing cover 601 to loosen.

[0038] The protective assembly 9 includes a first slide groove 901, a first slider 902, a second spring 903 and a protective plate 904. The end of the fixed seat 8 away from the first shell 3 is slidably connected to the first slider 902, the other end of the first slider 902 is provided with a protective plate 904, and a first slide groove 901 is provided on the fixed seat 8 corresponding to the first slider 902.

[0039] Specifically, the protective plate 904 can be provided to protect the first housing 3, the second housing 4 and the bearing seat 1, so as to prevent the reducer from being damaged by collision with the well wall during the descent process, thereby increasing the service life.

[0040] A plurality of second springs 903 are disposed in the first sliding groove 901 . One end of the second spring 903 is fixedly connected to the first sliding groove 901 , and the other end of the second spring 903 is fixedly connected to the first sliding block 902 .

[0041] Specifically, the elastic potential energy of the second spring 903 can provide a buffering effect to the protective plate 904 .

[0042] The expansion component 10 includes a second slide groove 1001, a second slider 1002, a cylinder 1003, a connecting plate 1004, a probe 1005 and an arc plate 1006. The left end of the fixed seat 8 is slidably connected to the second slider 1002. The left end of the fixed seat 8 is provided with a second slide groove 1001 corresponding to the second slider 1002. The upper end of the second slider 1002 is provided with a cylinder 1003. The other end of the cylinder 1003 is fixedly connected to the second slide groove 1001. The left end of the second slider 1002 is provided with a connecting plate 1004. The left end of the connecting plate 1004 is provided with a probe 1005, and the left end of the connecting plate 1004 is also provided with an arc plate 1006.

[0043] Specifically, when the reducer is in the process of descending, the probe 1005 can be used to observe the path of the descent. When an obstacle is found, the cylinder 1003 is started to drive the second slider 1002, the connecting plate 1004 and the arc plate 1006 to expand outward, and the arc plate 1006 pushes away the obstacle to ensure smooth descent of the reducer.

[0044] The working principle of the present invention is: When the present invention is in use, the connecting rod 703 is pulled upward to drive the limiting block 701 to separate from the limiting groove 702, the connecting rod 703 compresses the first spring 705, and then the rotating sleeve 615 is rotated to drive the second rotating rod 613 and the fourth bevel gear 612 to rotate, the fourth bevel gear 612 thereby drives the third bevel gear 611, the first rotating rod 608 and the second bevel gear 607 to rotate, the second bevel gear 607 thereby drives the first bevel gear 606 and the threaded rod 605 to rotate, the threaded rod 605 thereby drives the moving block 603 and the sealing cover 601 to move toward the position of the locking bolt 201, the sealing cover 601 thereby seals and protects the locking bolt 201, prevents the locking bolt 201 from being exposed to the outside for a long time and rusting, which affects the later disassembly and maintenance, and improves the convenience of maintenance and repair for the staff, and when the locking bolt 201 is sealed, the connecting rod 703 is loosened, and the elastic force of the first spring 705 Under the action of , the limit block 701 is driven to return to its original position, and the limit block 701 is inserted into the limit groove 702. The limit block 701 limits the rotating sleeve 615 and the second rotating rod 613 to prevent the second rotating rod 613 from rotating and causing the sealing cover 601 to loosen. The protective plate 904 structure and the elastic potential energy of the second spring 903 are used in combination to protect the first shell 3, the second shell 4 and the bearing seat 1 during the descent of the reducer, so as to prevent the reducer from colliding with the well wall during the descent and causing damage, thereby improving the service life. When the reducer is in the descent process, the probe 1005 can be used to observe the path during the descent process. When an obstacle is found, the cylinder 1003 is started to drive the second slider 1002, the connecting plate 1004 and the arc plate 1006 to expand outward, and the arc plate 1006 pushes away the obstacle to ensure the smooth descent of the reducer.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A protective device for a speed reducer for deep well operation, comprising a bearing seat (1), a sealing assembly (6) and a protective assembly (9), characterized in that: The bearing seat (1) is provided with a first flange (101), the right end of the first flange (101) is fitted with a second flange (2), a plurality of locking bolts (201) are provided between the first flange (101) and the second flange (2), and a sealing assembly (6) is provided at the right end of the bearing seat (1) corresponding to the locking bolts (201), the left end of the bearing seat (1) is provided with a second shell (4), the left end of the second shell (4) is provided with a first shell (3), the left end of the first shell (3) is provided with a base (5), the left end of the base (5) is provided with a plurality of supporting blocks (501), the left end of the base (5) is provided with a plurality of fixing seats (8), the lower end of the fixing seat (8) is fitted with the base (5), the first shell (3), the second shell (4) and the bearing seat (1), the fixing seat (8) is provided with a protective assembly (9), and the left end of the fixing seat (8) is provided with an expansion assembly (10).

2. A protective device for a reducer for deep well operation according to claim 1, characterized in that: The sealing assembly (6) comprises a sealing cover (601). A first sleeve (602) is symmetrically arranged at the front and rear ends of the right end of the bearing seat (1). The right end of the first sleeve (602) is slidably connected to a moving block (603). The right end of the moving block (603) is provided with a sealing cover (601). The right end of the sealing cover (601) is in contact with the first flange (101).

3. A protective device for a reducer for deep well operation according to claim 2, characterized in that: A first bearing (604) is provided at the right end of the bearing seat (1), a threaded rod (605) is provided at the right end of the first bearing (604), the threaded rod (605) is threadedly connected to the moving block (603), a first bevel gear (606) is provided on the threaded rod (605), the upper end of the first bevel gear (606) is meshed with a second bevel gear (607), a first rotating rod (608) penetrating the first sleeve (602) is provided at the upper end of the second bevel gear (607), and a second bearing (609) fixedly connected to the first sleeve (602) is provided on the first rotating rod (608).

4. A protective device for a reducer for deep well operation according to claim 3, characterized in that: A third bevel gear (611) is provided at the upper end of the first rotating rod (608), and a fourth bevel gear (612) is meshed on the third bevel gear (611). A second rotating rod (613) is provided at one end of the two fourth bevel gears (612) close to each other, and a rotating sleeve (615) is provided on the second rotating rod (613). A limiting assembly (7) is provided at the right end of the bearing seat (1) corresponding to the rotating sleeve (615). A fixed cover (610) is provided at the upper end of the first sleeve (602) corresponding to the first rotating rod (608), the third bevel gear (611) and the fourth bevel gear (612). The second rotating rod (613) passes through the fixed cover (610), and a third bearing (614) fixedly connected to the inner wall of the fixed cover (610) is provided on the second rotating rod (613).

5. The protective device for a reducer for deep well operation according to claim 4, characterized in that: The limiting assembly (7) comprises a limiting block (701), a limiting groove (702), a connecting rod (703), a second sleeve (704), a first spring (705) and a fixed block (706); the limiting block (701) is clamped on the rotating sleeve (615); a plurality of limiting grooves (702) are provided on the rotating sleeve (615) corresponding to the limiting block (701); a connecting rod (703) is provided at the upper end of the limiting block (701); the second sleeve (704) is sleeved on the connecting rod (703); a fixed block (706) is provided at the upper end of the second sleeve (704); and the left end of the fixed block (706) is fixedly connected to the bearing seat (1).

6. A protective device for a reducer for deep well operation according to claim 5, characterized in that: A first spring (705) is provided in the second sleeve (704); the upper end of the first spring (705) is fixedly connected to the top end of the second sleeve (704); and the lower end of the first spring (705) is fixedly connected to the connecting rod (703).

7. The protective device for a reducer for deep well operation according to claim 1, characterized in that: The protection component (9) comprises a first slide groove (901), a first slider (902), a second spring (903) and a protection plate (904); one end of the fixed seat (8) away from the first shell (3) is slidably connected to the first slider (902); the other end of the first slider (902) is provided with a protection plate (904); and the fixed seat (8) is provided with a first slide groove (901) corresponding to the first slider (902).

8. The protective device for a reducer for deep well operation according to claim 7, characterized in that: A plurality of second springs (903) are arranged in the first sliding groove (901), one end of the second spring (903) is fixedly connected to the first sliding groove (901), and the other end of the second spring (903) is fixedly connected to the first sliding block (902).

9. The protective device for a reducer for deep well operation according to claim 1, characterized in that: The expansion component (10) comprises a second slide groove (1001), a second slider (1002), a cylinder (1003), a connecting plate (1004), a probe (1005) and an arc plate (1006); the left end of the fixed seat (8) is slidably connected to the second slider (1002); the left end of the fixed seat (8) is provided with a second slide groove (1001) corresponding to the second slider (1002); the upper end of the second slider (1002) is provided with a cylinder (1003); the other end of the cylinder (1003) is fixedly connected to the second slide groove (1001); the left end of the second slider (1002) is provided with a connecting plate (1004); the left end of the connecting plate (1004) is provided with a probe (1005); and the left end of the connecting plate (1004) is also provided with an arc plate (1006).

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