Intelligent electromechanical integrated box-type substation

Abstract

The application discloses a kind of intelligent electromechanical integrated box-type substation, belong to intelligent high-voltage power grid equipment technical field, this intelligent electromechanical integrated box-type substation, including the installation hole being opened in the installation plate of corner through, and installation plate top surface is fixedly connected with support frame, the top surface corner of support frame is fixedly connected with horizontal adjustment support assembly, and horizontal adjustment support assembly top is installed with substation main body, the bottom center of substation main body is fixedly connected with connecting seat, and connecting seat other end is installed with multidirectional vibration isolation component, for the dynamic protection of substation main body.The application is by using horizontal adjustment support assembly and multidirectional vibration isolation component, can ensure that substation main body always maintains preset installation posture and structural integrity during long-term service, prevent substation main body internal high-voltage component and wiring terminal from loosening due to vibration or box deformation, reduce the risk of electrical fault such as poor contact, false alarm and even short-circuit trip.

Description

Technical Field

[0001] This invention belongs to the field of intelligent high-voltage power grid equipment technology, specifically relating to an intelligent electromechanical integrated box-type substation. Background Technology

[0002] Intelligent electromechanical integrated prefabricated substations are modern substation equipment that integrates electrical, mechanical, automation, and intelligent functions. They combine the compact and modular design advantages of traditional prefabricated substations with intelligent control and monitoring technologies, making the equipment more efficient, reliable, and intelligent. This meets the needs of modern power systems for intelligent management, remote monitoring, and automated operation. Compared to traditional substations, intelligent prefabricated substations have intelligent functions such as self-diagnosis, remote monitoring, and automatic control, reducing manual intervention. Through real-time monitoring and fault self-diagnosis, they reduce human error and maintenance costs.

[0003] During installation and service, existing prefabricated substations may experience structural deformation due to uneven stress caused by foundation settlement. This damages the sealing structure of the prefabricated substation, allowing rainwater and dust to enter and corrode internal electrical components. Furthermore, when exposed to ground vibrations (such as from roadside vehicles or nearby construction), the combined vibrations (vertical and horizontal) can be transmitted to the substation, causing high-voltage components and terminals to loosen. This can lead to minor issues like poor contact and false alarms in equipment self-diagnosis, or more serious electrical faults such as short circuits and tripping, increasing maintenance costs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an intelligent electromechanical integrated prefabricated substation.

[0005] The technical solution adopted to solve the above technical problems is: an intelligent electromechanical integrated box-type substation, including a mounting plate with mounting holes through the corners, and a support frame fixedly connected to the top surface of the mounting plate. A horizontal adjustment support component is fixedly connected to the corners of the top surface of the support frame, and the substation body is installed on the top of the horizontal adjustment support component. A connecting seat is fixedly connected to the center of the bottom of the substation body, and a multi-directional vibration isolation component is installed at the other end of the connecting seat for dynamic protection of the substation body.

[0006] Through the above technical solutions, during the installation phase, the horizontal adjustment support component completes adaptive leveling, and the multi-directional vibration isolation component adapts synchronously to attitude changes; during the service phase, the multi-directional vibration isolation component acts as a primary energy absorption structure to resist three-dimensional vibration, and the horizontal adjustment support component acts as a secondary energy absorption structure to supplement and absorb residual vibration. At the same time, the leveling mechanism maintains the horizontal attitude of the enclosure, ensuring the attitude stability of the substation main body throughout the entire process from installation to long-term service.

[0007] Furthermore, the horizontal adjustment support assembly includes several fixed seats, which are located at the corners of the top surface of the support frame. The fixed seats are connected and fixed to the support frame. The top of the fixed seat has a U-shaped hollow structure, and two wedge blocks are provided in the inner cavity of the fixed seat. The fixed seat and the wedge blocks are slidably connected.

[0008] Furthermore, the two wedge blocks are located on the top sides of the fixed base respectively, and a through groove is opened through the top of the wedge blocks. At the same time, a T-shaped plate is provided between the through grooves of the two wedge blocks. The two ends of the T-shaped plate are located in the through grooves of the two wedge blocks respectively, and the T-shaped plate is slidably connected to the wedge blocks.

[0009] Through the above technical solution, when the support surface tilts due to foundation settlement during the initial installation or later, the gravity of the substation body will drive the wedge blocks, T-plates, and No. 1 slide rods in the components to work together, so that the connecting plate and the equipment on it will undergo adaptive tilt compensation in the horizontal direction. This allows the substation body to restore and maintain a horizontal posture, avoiding structural deformation of the enclosure due to uneven stress, thus protecting the enclosure's sealing structure and preventing rainwater and dust from intruding and causing corrosion of internal components.

[0010] Furthermore, the bottom end of the T-shaped plate is rotatably connected to the fixed seat, and the top two sides of the wedge block are inclined. The inclined surface of the wedge block is slidably connected to a first sliding rod, and the bottom end of the first sliding rod is inclined and matches the inclined surface of the wedge block. At the same time, the first sliding rod is slidably connected to the fixed seat. A Z-shaped plate is provided on the top of the first sliding rod, and a connecting plate is fixedly connected to the top of the Z-shaped plate. The top ends of several first sliding rods located at the corners of the support frame are in contact with the Z-shaped plate and the connecting plate respectively, and the several first sliding rods are symmetrically distributed diagonally between each other.

[0011] Through the above technical solution, after the horizontal adjustment support component is leveled, its internal wedge blocks, T-plates and other components can maintain sliding constraints under high-frequency vibration, ensuring that the leveled state does not become unstable due to vibration. Furthermore, the mounting seat and slider at the top of the connecting plate form a "double-degree-of-freedom sliding pair" through the first and second fixing rods and the first and second springs. This pair mechanism can work together to absorb the composite vibration energy in the horizontal direction, forming a functional complement to the multi-directional vibration isolation component located at the center of the equipment, thus constituting a more comprehensive secondary protection system.

[0012] Furthermore, a first fixing rod is fixedly connected to both sides of the top of the connecting plate, and a slider is slidably connected through the first fixing rod. At the same time, a first spring is fixedly connected between the slider and the connecting plate. Two second fixing rods are fixedly connected between the two sliders located on both sides of the top of the connecting plate, and mounting bases are slidably connected through the two second fixing rods. Meanwhile, the corner of the bottom of the substation body is located in the mounting base, and a second spring is fixedly connected between the mounting base and the slider.

[0013] The above technical solution relies entirely on mechanical transmission to achieve leveling and auxiliary energy absorption, eliminating the need for electrical components such as motors, sensors, and control modules. This results in higher reliability in harsh outdoor environments such as high temperatures, rain, snow, and dust, and reduces electrical failure points.

[0014] Furthermore, the multi-directional vibration isolation component includes a fixed plate fixedly connected to the bottom end of the connecting seat, and the first sliding rod is arranged in a cross-shaped structure. At the same time, a connecting rod is fixedly connected to the center line of the bottom of the cross end of the fixed plate. A through hole is opened at the point where the center line of the support frame intersects perpendicularly with the center line of the cross end of the fixed plate, and a spherical block is arranged in the through hole. The spherical block is rotatably connected to the support frame.

[0015] Furthermore, the end of the connecting rod away from the fixed plate is slidably connected to the spherical block, and a No. 3 spring is fixedly connected between the connecting rod and the spherical block. A No. 2 sliding rod is rotatably connected to both sides of the cross end of the fixed plate, and a sleeve is slidably connected to the end of the No. 2 sliding rod away from the fixed plate. The sleeve is rotatably connected to the outer wall of the fixed seat, and a No. 4 spring is fixedly connected between the No. 2 sliding rod and the sleeve.

[0016] The above technical solutions fundamentally avoid a series of chain failures caused by substation tilting, seal failure, and loose components, significantly improving equipment reliability and durability, and reducing maintenance needs and costs due to environmental factors.

[0017] The beneficial effects of the present invention are as follows: (1) The present invention adopts a horizontal adjustment support component to achieve adaptive leveling and vibration-assisted energy absorption. The mechanical transmission of the T-plate, wedge block and No. 1 slide rod is driven by the gravity of the substation body itself to automatically compensate for the slight unevenness of the installation base surface and complete the tilt correction. There is no need for manual measurement and manual adjustment of bolts, which greatly reduces the requirements for the leveling accuracy of the construction base surface and the professionalism of the operators, and improves the installation efficiency. At the same time, the slider and No. 1 fixed rod, the mounting seat and No. 2 fixed rod in the component form a double-degree-of-freedom sliding pair. With the elastic deformation of No. 1 and No. 2 springs, it can efficiently absorb the composite vibration energy in the horizontal direction, provide horizontal vibration protection for the substation body, and reduce the transmission of vibration to the inside of the box. The sliding constraint of the wedge block and T-plate and the diagonal symmetrical distribution design of No. 1 slide rod allow the leveling mechanism to only make slight floating when the ground vibrates and the foundation settles slightly, without becoming unstable. It always maintains the posture support for the substation body and avoids leveling failure due to vibration.

[0018] (2) This invention adopts a multi-directional vibration isolation component. The spherical block rolls in the through hole and the No. 3 spring extends vertically, which effectively absorbs vertical vibration (such as the vertical force of foundation settlement and ground impact). The universal sliding of the No. 2 slide rod and the sleeve is combined with the elastic deformation of the No. 4 spring, which effectively suppresses the inertial displacement in the X and Y directions in the horizontal plane (such as the horizontal vibration caused by vehicle driving and construction). This solves the defect of traditional vibration isolation structures that can only protect against vibration in one direction. The component is fixed to the connecting seat at the bottom center of the substation body. The No. 2 slide rod and the sleeve are both connected by universal rotation. When the horizontal adjustment support component is leveled, the component can simultaneously rotate universally and slide the slide rod to adapt to the attitude adjustment of the box. It will not generate additional structural stress due to leveling, and protect the structural integrity of the connection between the component and the box. It can be combined with the remote monitoring and self-diagnosis functions of the intelligent box substation to realize unmanned dynamic protection, which perfectly meets the needs of modern intelligent high voltage power grid for equipment efficiency, intelligence and low manual dependence. Attached Figure Description

[0019] Figure 1 This is a first-view structural schematic diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the second perspective structure of the present invention;

[0021] Figure 3 This is a first-view structural diagram of the top component of the support frame of the present invention;

[0022] Figure 4 This is a second-view structural diagram of the support frame top component of the present invention;

[0023] Figure 5 This is a schematic diagram of the top component structure of the fixing base of the present invention;

[0024] Figure 6 This is a schematic diagram of the connection between the first sliding rod and the wedge block of the present invention;

[0025] Figure 7 This is a schematic diagram of the connection between the first sliding rod and the Z-shaped plate of the present invention;

[0026] Figure 8 yes Figure 2 A magnified structural diagram at point A;

[0027] Figure 9 yes Figure 3 A magnified structural diagram at point B;

[0028] Figure 10 yes Figure 4 A magnified structural diagram at point C.

[0029] Reference numerals: 11. Mounting plate; 12. Mounting hole; 13. Support frame; 14. Substation main body; 15. Connecting seat; 2. Horizontal adjustment support assembly; 21. Fixed seat; 22. T-shaped plate; 23. Wedge block; 24. Through slot; 25. No. 1 sliding rod; 26. Z-shaped plate; 27. Connecting plate; 28. No. 1 fixed rod; 29. ​​No. 1 spring; 210. Slider; 211. No. 2 fixed rod; 212. No. 2 spring; 213. Mounting seat; 3. Multi-directional vibration isolation assembly; 31. Through hole; 32. Spherical block; 33. Connecting rod; 34. No. 3 spring; 35. Fixed plate; 36. No. 2 sliding rod; 37. No. 4 spring; 38. Sleeve. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0031] like Figures 1-7 As shown in this embodiment, an intelligent electromechanical integrated box-type substation includes a mounting plate 11 with mounting holes 12 extending through its corners. A support frame 13 is fixedly connected to the top surface of the mounting plate 11. A horizontal adjustment support assembly 2 is fixedly connected to the corner of the top surface of the support frame 13. The horizontal adjustment support assembly 2 includes several fixed seats 21, which are located at the corners of the top surface of the support frame 13. The fixed seats 21 are connected and fixed to the support frame 13. During installation, the horizontal adjustment support assembly 2 performs adaptive leveling, and the multi-directional vibration isolation assembly 3 adapts synchronously to the attitude change. During service, the multi-directional vibration isolation assembly 3 acts as a primary vibration absorber. The structure can resist three-dimensional vibration. The horizontal adjustment support component 2 serves as a secondary energy absorption structure to supplement and absorb residual vibration. At the same time, the leveling mechanism maintains the horizontal posture of the box body. From installation to long-term service, the posture stability of the substation body 14 is guaranteed. The top of the fixed seat 21 is set with a U-shaped hollow structure, and two wedge blocks 23 are set in the inner cavity of the fixed seat 21. The two wedge blocks 23 are located on the top two sides of the fixed seat 21, and the top of the wedge blocks 23 is provided with a through groove 24. At the same time, a T-shaped plate 22 is set between the through grooves 24 of the two wedge blocks 23. The bottom end of the T-shaped plate 22 is rotatably connected to the fixed seat 21, and the top two sides of the wedge blocks 23 are inclined.

[0032] like Figures 2-7As shown, a sliding rod 25 is slidably connected to the inclined surface of the wedge block 23, and the bottom end of the sliding rod 25 is inclined to match the inclined surface of the wedge block 23. The sliding rod 25 is also slidably connected to the fixed seat 21. A Z-shaped plate 26 is provided at the top of the sliding rod 25, and a connecting plate 27 is fixedly connected to the top of the Z-shaped plate 26. A fixing rod 28 is fixedly connected to both sides of the top of the connecting plate 27, and a slider 210 is slidably connected to the fixing rod 28. A spring 29 is fixedly connected between the slider 210 and the connecting plate 27. During the initial installation or later when the support surface tilts due to foundation settlement, the gravity of the substation main body 14 will drive the wedge block 23 and the T-shaped plate 25 within the assembly. 2. The linkage of the No. 1 slide bar 25 and other mechanisms causes the connecting plate 27 and the equipment on it to undergo adaptive tilt compensation in the horizontal direction, thereby allowing the substation body 14 to restore and maintain a horizontal posture, avoiding structural deformation of the box due to uneven force, thus protecting the sealing structure of the box and preventing rainwater and dust from entering and causing corrosion of internal components. Two No. 2 fixing rods 211 are fixedly connected between the two sliders 210 on both sides of the top of the connecting plate 27, and the two No. 2 fixing rods 211 are slidably connected through the mounting base 213. At the same time, the bottom corner of the substation body 14 is located in the mounting base 213, and a No. 2 spring 212 is fixedly connected between the mounting base 213 and the slider 210.

[0033] like Figures 1-10As shown, the tops of several sliding rods 25 located at the corners of the support frame 13 are in contact with the Z-shaped plate 26 and the connecting plate 27, respectively. The sliding rods 25 are symmetrically distributed diagonally in pairs. The two ends of the T-shaped plate 22 are located within the through slots 24 of two wedge-shaped blocks 23, and the T-shaped plate 22 is slidably connected to the wedge-shaped blocks 23. Simultaneously, the fixing seat 21 is slidably connected to the wedge-shaped blocks 23. The substation body 14 is mounted on the top of the horizontal adjustment support assembly 2, and a connecting seat 15 is fixedly connected to the center of the bottom of the substation body 14. After leveling, the wedge-shaped blocks 23, T-shaped plates 22, and other components inside the horizontal adjustment support assembly 2 can maintain sliding constraints under high-frequency vibration, ensuring that the leveled state does not become unstable due to vibration. Furthermore, the mounting seat 213 on the top of the connecting plate 27 and the slider 210 are connected by the first and second fixing rods 2... Springs 11 and 212 form a "two-degree-of-freedom sliding pair". This pair can absorb the composite vibration energy in the horizontal direction in a coordinated manner. It complements the multi-directional vibration isolation component 3 located in the center of the equipment, forming a more comprehensive secondary protection system. The other end of the connecting seat 15 is equipped with the multi-directional vibration isolation component 3 for dynamic protection of the substation body 14. The multi-directional vibration isolation component 3 includes a fixing plate 35 fixedly connected to the bottom end of the connecting seat 15. The fixing plate 35 is arranged in a cross shape. At the same time, a connecting rod 33 is fixedly connected to the center line of the bottom of the cross end of the fixing plate 35. The leveling and auxiliary energy absorption are achieved by mechanical transmission throughout the process. There is no need for electrical components such as motors, sensors, and control modules. The reliability of operation is higher in harsh outdoor environments such as high temperature, rain, snow, and dust, and the number of electrical failure points is reduced.

[0034] like Figures 2-10 As shown, the end of the connecting rod 33 away from the fixed plate 35 is slidably connected to the spherical block 32, and a No. 3 spring 34 is fixedly connected between the connecting rod 33 and the spherical block 32. The two sides of the cross end of the fixed plate 35 are rotatably connected to the No. 2 sliding rod 36, and the end of the No. 2 sliding rod 36 away from the fixed plate 35 is slidably connected to the sleeve 38. The sleeve 38 is rotatably connected to the outer wall of the fixed seat 21. This fundamentally avoids a series of chain failures caused by the tilting of the substation body 14, sealing failure, and loose components, significantly improving the reliability and durability of the equipment, and reducing maintenance needs and costs caused by environmental factors. A No. 4 spring 37 is fixedly connected between the No. 2 sliding rod 36 and the sleeve 38. A through hole 31 is opened at the point where the center line of the support frame 13 intersects perpendicularly with the center line of the cross end of the fixed plate 35, and a spherical block 32 is set in the through hole 31. At the same time, the spherical block 32 is rotatably connected to the support frame 13.

[0035] The working principle of this embodiment is as follows: First, the mounting plate 11 and its top components are placed on the surface of the foundation to be installed. Then, the mounting holes 12 at the corners of the mounting plate 11 are fixed to the foundation using bolts. Subsequently, the bottom corners of the substation body 14 are aligned with the inner cavity of the mounting base 213, and the connecting base 15 at the bottom of the substation body 14 is connected and fixed to the fixing plate 35. At this time, the connecting base 15 drives the fixing plate 35 to press down, causing the spherical block 32 to rotate omnidirectionally along the inner wall of the through hole 31, and simultaneously compressing the No. 3 spring 34.

[0036] At the same time, the Z-shaped plate 26 slides down along the first sliding rod 25 under the gravity of the substation body 14, driving the T-shaped plate 22 to slide in the through groove 24 of the wedge block 23, forcing the wedge block 23 to slide along the fixed seat 21 and causing the connecting plate 27 to rotate with the connection point with the fixed seat 21 as the origin. This causes the connecting plate 27 and the substation body 14 on top to undergo adaptive tilt compensation in the horizontal direction, thereby realizing dynamic leveling of the mounting surface of the substation body 14. At this time, the second sliding rod 36 and the sleeve 38 on both sides of the cross end of the fixed plate 35 rotate relative to each other to adapt to the lateral displacement generated by the substation body 14 during the horizontal leveling process.

[0037] When the foundation settles or the ground vibrates (such as due to roadside vehicles or surrounding construction), the multi-directional vibration isolation component 3 initiates a three-dimensional dynamic response. The spherical block 32 rolls omnidirectionally within the through hole 31, releasing vertical impact energy. The third spring 34 elastically extends and retracts along the connecting rod 33 to absorb vertical vibration. The second slide rod 36 slides relative to the sleeve 38 and deflects around the omnidirectional rotation node. The fourth spring 37 compresses or stretches synchronously to suppress inertial displacement in the X and Y directions in the horizontal plane. At the same time, the wedge block 23 in the horizontal adjustment support component 2 maintains sliding constraint with the T-shaped plate 22, and the Z-shaped plate 26 floats slightly along the first slide rod 25 to ensure that the leveling mechanism does not become unstable due to high-frequency vibration. This maintains the attitude stability and structural integrity of the substation body 14 under dynamic loads. At the same time, the mounting base 213 on the top of the connecting plate 27 slides relative to the second fixed rod 211, while the slider 210 slides relative to the first fixed rod 28. Together, they form a two-degree-of-freedom sliding pair. The first spring 29 and the second spring 212 deform synchronously and work together to absorb the composite vibration energy in the horizontal direction, forming a secondary energy absorption mechanism that complements the multi-directional vibration isolation component 3. This ensures that the substation body 14 is always in the preset installation posture during long-term service, preventing the substation body 14 from tilting, the internal component wiring from loosening, and the seal from failing.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A smart electromechanical integrated box-type substation, comprising a mounting plate (11) with mounting holes (12) extending through its corners, and a support frame (13) fixedly connected to the top surface of the mounting plate (11), characterized in that: A horizontal adjustment support assembly (2) is fixedly connected to the corner of the top surface of the support frame (13), and a substation body (14) is installed on the top of the horizontal adjustment support assembly (2). A connecting seat (15) is fixedly connected to the center of the bottom of the substation body (14), and a multi-directional vibration isolation assembly (3) is installed on the other end of the connecting seat (15) for dynamic protection of the substation body (14).

2. The intelligent electromechanical integrated prefabricated substation according to claim 1, characterized in that, The horizontal adjustment support assembly (2) includes several fixed seats (21), and the several fixed seats (21) are located at the corners of the top surface of the support frame (13). At the same time, the fixed seats (21) are connected and fixed to the support frame (13). The top of the fixed seat (21) is set with a U-shaped hollow structure, and two wedge blocks (23) are set in the inner cavity of the fixed seat (21). The fixed seat (21) and the wedge blocks (23) are slidably connected.

3. The intelligent electromechanical integrated prefabricated substation according to claim 2, characterized in that, The two wedge blocks (23) are located on the top sides of the fixed base (21) respectively, and the top of the wedge blocks (23) is provided with a through groove (24). At the same time, a T-shaped plate (22) is provided between the through grooves (24) of the two wedge blocks (23). The two ends of the T-shaped plate (22) are located in the through grooves (24) of the two wedge blocks (23) respectively, and the T-shaped plate (22) is slidably connected to the wedge blocks (23).

4. The intelligent electromechanical integrated prefabricated substation according to claim 3, characterized in that, The bottom end of the T-shaped plate (22) is rotatably connected to the fixed seat (21), and the top two sides of the wedge block (23) are inclined. The inclined surface of the wedge block (23) is slidably connected to the first slide rod (25), and the bottom end of the first slide rod (25) is inclined and matches the inclined surface of the wedge block (23). At the same time, the first slide rod (25) is slidably connected to the fixed seat (21). The top of the first slide rod (25) is provided with a Z-shaped plate (26), and the top of the Z-shaped plate (26) is fixedly connected with a connecting plate (27). The top ends of several first slide rods (25) located at the corners of the support frame (13) are in contact with the Z-shaped plate (26) and the connecting plate (27) respectively, and the several first slide rods (25) are symmetrically distributed diagonally between each other.

5. The intelligent electromechanical integrated prefabricated substation according to claim 4, characterized in that, A first fixing rod (28) is fixedly connected to the top two sides of the connecting plate (27), and a slider (210) is slidably connected through the first fixing rod (28). At the same time, a first spring (29) is fixedly connected between the slider (210) and the connecting plate (27). Two second fixing rods (211) are fixedly connected between the two sliders (210) located on the top two sides of the connecting plate (27), and a mounting base (213) is slidably connected through the two second fixing rods (211). At the same time, the corner of the bottom of the substation body (14) is located in the mounting base (213), and a second spring (212) is fixedly connected between the mounting base (213) and the slider (210).

6. The intelligent electromechanical integrated prefabricated substation according to claim 2, characterized in that, The multi-directional vibration isolation component (3) includes a fixed plate (35) fixedly connected to the bottom end of the connecting seat (15), and the fixed plate (35) is arranged in a cross shape. At the same time, a connecting rod (33) is fixedly connected to the center line of the bottom of the cross end of the fixed plate (35). A through hole (31) is opened at the point where the center line of the support frame (13) intersects the center line of the cross end of the fixed plate (35) perpendicularly. A spherical block (32) is arranged in the through hole (31), and the spherical block (32) is rotatably connected to the support frame (13).

7. The intelligent electromechanical integrated prefabricated substation according to claim 6, characterized in that, The end of the connecting rod (33) away from the fixed plate (35) is slidably connected to the spherical block (32), and a No. 3 spring (34) is fixedly connected between the connecting rod (33) and the spherical block (32). The two sides of the cross end of the fixed plate (35) are rotatably connected to the No. 2 slide rod (36), and the end of the No. 2 slide rod (36) away from the fixed plate (35) is slidably connected to the sleeve (38), and the sleeve (38) is rotatably connected to the outer wall of the fixed seat (21). A No. 4 spring (37) is fixedly connected between the No. 2 slide rod (36) and the sleeve (38).

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