Anti-inclination bracket for mounting pole-mounted direct-current converter transformer

Abstract

The invention relates to the technical field of supports, and particularly discloses an anti-inclination support for mounting a pole-mounted direct current converter transformer, the anti-inclination support comprises four mounting support rods, and the inner sides of the upper ends of the four mounting support rods are jointly provided with a transformer body; mounting plates are arranged on the inner sides of the left mounting supporting rod and the right mounting supporting rod correspondingly, and symmetrical mounting vertical plates are fixedly mounted on the upper end faces of the mounting plates correspondingly. A worm wheel can be driven to rotate under the effect of a worm, a connecting rotating shaft can drive a limiting support block to rotate in the rotating process of the worm wheel, and then the side edge, the upper edge and the lower edge of a transformer body can be supported under the effect of the limiting support block. And the transformer body can be limited and protected, and therefore it is guaranteed that the transformer body does not incline.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of support, in particular to an anti-inclination support for installation of a pole-mounted DC converter transformer. BACKGROUND

[0002] As a key device in high-voltage direct current transmission systems, the DC converter transformer plays a crucial role in the process of electric energy conversion and transmission.

[0003] However, during installation, the DC converter transformer often faces the risk of tilting, which not only may affect its normal operation, but also may pose a threat to the surrounding environment and personnel safety.

[0004] Therefore, how to effectively solve the problem of tilting of the DC converter transformer during installation and ensure its stable operation has become a technical problem to be solved. The traditional support design often ignores this point, resulting in many safety hazards in actual application.

[0005] The traditional installation method often cannot effectively prevent the tilting of the DC converter transformer, therefore, it is particularly important to develop a support that can effectively prevent tilting. SUMMARY

[0006] The purpose of the present application is to provide an anti-inclination support for installation of a pole-mounted DC converter transformer to solve the problems raised in the background.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solution: an anti-inclination support for installation of a pole-mounted DC converter transformer, comprising installation support rods, the number of which is four, the upper end inner side of the four installation support rods is provided with a transformer body in common; The inner side of the left and right two installation support rods is provided with an installation plate, and the upper end surface of the installation plate is fixedly installed with an installation stand in a symmetrical state; The inner side surface of the transversely adjacent two installation stands is rotatably provided with a connecting shaft in a thorn state; The outer side of the connecting shaft is provided with a limiting support block, and the inner side surface of the limiting support block and the outer side surface of the transformer body are in a bonded state.

[0008] Preferably, the lower end outer side surface of the installation support rod is fixedly installed with a cement pile, and the upper end outer side circumferential surface of the installation support rod is provided with a symmetrical half-clamp, two half-clamps form a group, and the half-clamps have a ring structure.

[0009] Preferably, the inner side of one end of the two half clamping rings is fixedly provided with a cylinder, and the circumferential surface of the two cylinders is jointly provided with a convex sliding block.

[0010] Preferably, the outer side of the mounting connecting plate is provided with a first convex sliding groove at equal intervals from one end to the other end, and the end of the convex sliding block away from the half clamping ring is slidingly installed in the first convex sliding groove.

[0011] Preferably, the lower end surface of the two transversely adjacent mounting plates is provided with a through hole, and the inside of the two through holes is jointly slidingly installed with a connecting support plate, both ends of the connecting support plate are fixedly installed with a convex block, and the inner side of the convex block and the lower end surface of the mounting plate between the outer side edge positions of the through hole are fixedly installed with a spring.

[0012] Preferably, a longitudinal connecting plate is fixedly installed between the inner side surfaces of the front and rear mounting plates, and anti-skid mounting rods are fixedly installed at equal intervals on the upper end surfaces of the longitudinal connecting plate, and the upper end surfaces of the anti-skid mounting rods and the transformer body are fixedly connected by bolts.

[0013] Preferably, a rotating shaft is rotatably installed on the inner side upper end and inner side middle part of the two adjacent mounting vertical plates, and a worm gear is fixedly installed on the outer side of one end of the rotating shaft.

[0014] Preferably, a worm gear is rotatably installed on the inner side surface of the inner mounting vertical plate, the worm gear is engaged with the adjacent worm gear, and a knob is fixedly installed on the outer side of one end of the worm gear.

[0015] Preferably, a connecting rotating shaft is fixedly installed on the circumferential surface of the rotating shaft, and the inner side of one end of the connecting rotating shaft away from the rotating shaft is rotatably connected with the limiting support block.

[0016] Preferably, a vertical rod is fixedly installed on the inner upper end surface of the mounting plate, a connecting rod is rotatably installed on the upper end of the vertical rod, a cavity groove is formed in the inner side of one end of the connecting rod away from the vertical rod, a tension spring is fixedly installed in the inner side of the cavity groove, a first sliding rod is fixedly installed on the outer side of one end of the front two tension springs away from the tension spring, a T-shaped connecting rod is fixedly installed on the outer side of one end of the first sliding rod away from the tension spring, a second sliding rod is fixedly installed on the outer side of one end of the rear two tension springs away from the tension spring, a T-shaped installation groove is formed in the upper side surface to the lower end surface of one end of the second sliding rod away from the tension spring, the T-shaped installation groove and the T-shaped connecting rod are engaged, and the lower end surface of the T-shaped installation groove and the T-shaped connecting rod is attached to the upper end surface of the transformer body.

[0017] Compared with the prior art, the present application has the following advantages: 1. The worm can drive the worm gear to rotate, the connecting shaft can rotate with the limiting support block in the process of rotating the worm gear, and the limiting support block can support the side and the upper and lower edge positions of the transformer body, thereby limiting and protecting the transformer body, and ensuring that the transformer body does not tilt.

[0018] 2. The first sliding rod and the second sliding rod can slide in the cavity groove under the action of the tension spring, and the upper end surface of the transformer body can be in a state of abutting under the action of the T-shaped connecting rod and the T-shaped mounting groove, thereby pressing the transformer body downward, further ensuring that the transformer body does not tilt and ensuring the safety of the transformer body.

[0019] 3. The installation plate, the connecting support plate and the spring can change the distance between the two adjacent installation connecting plates, so that the device can be suitable for transformer bodies of different lengths in subsequent operations, thereby changing the practicality and diversity of the device. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0021] Figure 1 is the main structure diagram of the present application; Figure 2 is the component structure diagram of the present application; Figure 3 is the installation support rod structure diagram of the present application; Figure 4 is the installation plate schematic diagram of the present application; Figure 5 is the half clasp ring structure diagram of the present application; Figure 6 is the worm gear and worm structure diagram of the present application; Figure 7 is the installation plate, longitudinal connecting plate and anti-skid installation rod structure diagram of the present application; Figure 8 is the vertical rod, first sliding rod and second sliding rod structure diagram of the present application; Figure 9 is the first sliding rod and second sliding rod structure diagram of the present application.

[0022] Reference signs: 1, cement pile; 2, installation support rod; 3, half clasp; 4, convex sliding block; 5, installation connecting plate; 6, first convex sliding groove; 7, installation plate; 8, through hole; 9, connecting support plate; 10, protruding block; 11, spring; 12, longitudinal connecting plate; 13, anti-skid installation rod; 14, installation vertical plate; 15, rotating shaft; 16, connecting rotating shaft; 17, limiting support block; 18, worm gear; 19, worm; 20, knob; 21, vertical rod; 22, connecting rod; 23, cavity groove; 24, tension spring; 25, first sliding rod; 26, T-shaped connecting rod; 27, second sliding rod; 28, T-shaped installation groove; 29, transformer body. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to 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. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] Please refer to Figures 1 to 9 , the present application provides a technical solution: A kind of anti-inclination support for pole-mounted DC converter transformer installation, including cement pile 1, it needs to be explained that, in the process of operation, the lower half of its cement pile 1 needs to be filled in soil, so as to increase bearing capacity and support force, such as Figure 1 As shown.

[0025] Then, the installation support rod 2 of circular structure is fixedly installed in the inside of the cement pile 1 to the upper end outside, and the number of installation support rod 2 is four, and two groups of symmetrical half clasp 3 are arranged on the upper end outside circumferential surface of each installation support rod 2, as shown in Figure 5 As shown, two adjacent half clasps 3 can be combined into a ring structure, wherein the outside of one end opening is fixedly connected by bolt, and the other end is a U-shaped structure, and a cylinder is arranged in the inside of the U-shaped structure, and the outer circumferential surface of the two adjacent cylinders is provided with a convex sliding block 4, as shown in Figure 5 As shown.

[0026] Then, the installation connecting plate 5 in vertical state is arranged on the outside of the installation support rod 2, and the first convex sliding groove 6 is opened at equal intervals on the side surface of the installation connecting plate 5 close to the half clasp 3, and the convex sliding block 4 is slidably installed in the inside of the corresponding first convex sliding groove 6, so that the installation connecting plate 5 can be combined with the half clasp 3 through the convex sliding block 4.

[0027] In use, first, the position of the cement pile 1 is fixed and determined, and then fixedly connected with the installation support rod 2. Secondly, the two half clamping rings 3 of the same structure are combined together, and then the convex slide block 4 is slidably installed in the first convex slide groove 6. Then, the adjacent two half clamping rings 3 are fixedly connected at one end of the opening by using the bolt and nut structure, so that the installation connecting plate 5 is in a fixed state, and the height from the bottom surface meets the height of the subsequent installation. In use, the convex slide block 4 and the first convex slide groove 6 can be matched and slid according to the situation, and the installation connecting plate 5 is in a fixed state by increasing the structure.

[0028] Secondly, the installation plate 7 is fixedly installed at the lower end surface of each installation connecting plate 5 by using the bolt and nut structure, as shown in Figure 4

[0029] The two adjacent installation plates 7 can be combined into a longer support structure, and the through hole 8 is formed in the inner side of the lower end surface of each installation plate 7. Because the inner side of the lower end surface of the installation plate 7 protrudes outward, the through hole 8 can be formed, as shown in Figure 4

[0030] The connection support plate 9 is slidably installed between the adjacent two through holes 8 and the outer side, and the U-shaped convex block 10 is fixedly installed at the left and right end edges of the connection support plate 9, as shown in Figure 4

[0031] A plurality of springs 11 are fixedly installed between the inner side of the convex block 10 and the outer side edge position of the through hole 8, as shown in Figure 4

[0032] Therefore, in use, the span of the site is large, which causes the distance between the two adjacent installation support rods 2 to be too large. Therefore, in use, the adjacent end of the installation plate 7 can be gradually in a state of moving away under the action of the installation connecting plate 5, and the installation plate 7 and the connection support plate 9 can be in a state of being pulled under the action of the spring 11, so that the connection support plate 9 cannot be randomly pulled out, thereby ensuring the stability of the structure. Moreover, through the cooperation of the connection support plate 9 and the spring 11, the adjacent two installation plates 7 have a certain elastic connection effect. In the installation process, even if the distance between the two adjacent installation support rods 2 changes due to the large span of the site, the installation plate 7 can be adjusted accordingly under the elastic action of the spring 11, so as to maintain the overall stability and firmness. At the same time, this elastic connection effect can also reduce the influence of external force impact or vibration and other factors on the installation structure to a certain extent, thereby improving the reliability and service life of the entire anti-inclination support. ​​​​

[0033] A plurality of anti-skid mounting rods 13 are fixedly installed on the upper end surface of the longitudinal connecting plate 12 at equal intervals. During use, the transformer body 29 needs to be supported, so that the longitudinal connecting plate 12 can provide an upward supporting force, and the anti-skid mounting rod 13 can be attached to the lower end surface of the transformer body 29, thereby realizing the stability and firmness of the transformer body 29 during installation.

[0034] The design of the anti-skid mounting rod 13 not only enhances the attachment to the lower end surface of the transformer body, but also prevents sliding during installation or use. The anti-skid mounting rod 13 is made of high-strength wear-resistant alloy steel, which has excellent strength and hardness, can maintain the stability and reliability of the structure during long-term use, has good corrosion resistance, can effectively resist external environmental erosion, and prolongs the service life of the anti-inclination support. At the same time, the high-strength wear-resistant alloy steel is relatively light in weight, facilitating transportation and installation, reducing construction difficulty and cost, and further improving the carrying capacity of the entire installation structure.

[0035] In addition, the combination of the longitudinal connecting plate 12 and the anti-skid mounting rod 13 forms a stable support system, which can ensure that the transformer body remains horizontal even in complex environmental conditions, avoiding safety hazards caused by inclination.

[0036] Symmetrical installation upright plates 14 are fixedly installed on the upper end surface of the installation plate 7, and symmetrical rotating shafts 15 are rotatably installed on the inner sides of two adjacent installation upright plates 14. Worm gears 18 are fixedly installed on one end of the rotating shaft 15 and located on the outer side of the installation upright plate 14, and worm rods 19 are rotatably installed on the outer side surface of the installation upright plate 14. The worm rod 19 and the adjacent worm gear 18 are in meshing state, as shown in Figure 6 .

[0037] Then, a knob 20 is fixedly installed on one end of the worm rod 19 for rotating the worm rod 19.

[0038] Secondly, symmetrical connecting rotating shafts 16 are fixedly installed on the outer circumferential surface of both ends of the rotating shaft 15, and limit support blocks 17 are rotatably installed on the inner sides of the two adjacent connecting rotating shafts 16 away from the rotating shaft 15.

[0039] It should be noted that the position of the limit support block 17 and the connecting rotating shaft 16 is rotatably connected by a strong damping device, The structure of the strong damping device is mainly composed of damping springs, damping grease and rotating friction plates. The damping springs are tightly wrapped outside the connecting shaft 16, one end of which is fixedly connected with the connecting shaft 16, and the other end is connected with the inner wall of the limiting support block 17. This design enables the damping springs to provide stable resistance when rotating the connecting shaft 16 and the limiting support block 17, effectively slows down the rotation speed, avoids equipment damage or safety hazards caused by sudden rotation, and at the same time, the damping grease is filled on the contact surface of the rotating friction plate, further increasing the rotation resistance and improving the stability and safety of the device.

[0040] Therefore, during use, the operator can rotate the knob 20 to drive the worm 19 to rotate. The meshing relationship between the worm 19 and the worm gear 18 enables the worm gear 18 to drive the rotating shaft 15 to rotate. With the rotation of the rotating shaft 15, the connecting shaft 16 also rotates, thereby driving the limiting support block 17 to swing around the connecting shaft 16 as the axis. Since the limiting support block 17 and the connecting shaft 16 are connected by the strong damping device, the swinging speed of the limiting support block 17 is effectively controlled during rotation, avoiding equipment damage or safety hazards that may be caused by rapid rotation.

[0041] This design not only improves the stability of operation, but also makes the entire anti-inclination support more safe and reliable during use. By adjusting the position of the limiting support block 17, precise control of the installation angle of the pole-mounted HVDC converter transformer can be achieved, thereby effectively preventing it from tilting during installation and ensuring stable operation of the equipment. At the same time, the structure of the anti-inclination support is reasonable, easy to install and maintain, reduces the use cost, and improves the work efficiency.

[0042] Then, a vertical stand 21 is fixedly installed on the inner side of each mounting plate 7 at the upper end edge position. It should be noted that during operation and use, the stand 21 can be modified into a telescopic structure according to the situation to adapt to transformers of different heights, as shown in Figure 1 .

[0043] The inner side of the upper end of the stand 21 is rotatably installed with a connecting rod 22. The end of the connecting rod 22 away from the stand 21 is provided with a cavity slot 23, and a tension spring 24 is fixedly installed in the cavity slot 23, as shown in Figure 9 .

[0044] As shown in Figure 9 , the left end of each tension spring 24 on the right side is fixedly installed with a first sliding rod 25, and the right end of the first sliding rod 25 is slidingly installed in the cavity slot 23, and the left end of the first sliding rod 25 is fixedly installed with a T-shaped connecting rod 26.

[0045] And the right end of the left side of the tension spring 24 is fixedly installed with the second slide rod 27, and the upper end surface to the lower end surface of the second slide rod 27 is provided with a T-shaped installation slot 28, and in use, the T-shaped connecting rod 26 can be slidably connected in the T-shaped installation slot 28 to form an integral structure, and then the upper end surface of the transformer body 29 can be in a state of adhesion.

[0046] Therefore, in use, when the bracket needs to be fixedly installed with the transformer body 29, the operator can manually move the two sides of the T-shaped connecting rod 26 and the second slide rod 27 towards each other, so that the tension spring 24 is stretched and deformed.

[0047] At this time, the T-shaped connecting rod 26 will slide out of the T-shaped installation slot 28, so that the connecting rod 22 can rotate around the vertical rod 21.

[0048] Then, the operator can adjust the state of the connecting rod 22 according to the specific size and shape of the transformer body 29, so that it perfectly fits the upper end surface of the transformer body 29.

[0049] After completion, the operator makes the T-shaped connecting rod 26 and the second slide rod 27 fit together, and at this time the tension spring 24 will recover under the action of its own deformation.

[0050] So that the T-shaped connecting rod 26 and the T-shaped installation slot 28 can better fit together, and then the transformer pump body 29 can be pressed to work, so as to realize the whole protection work.

[0051] Working principle: First, the position of the cement pile 1 is fixed and determined, and then the support rod 2 is fixedly connected, and then the two half clamping rings 3 of the same structure are combined together, and then the convex slide block 4 is slidably installed in the first convex slide groove 6, and then the adjacent two half clamping rings 3 are fixedly connected by using the structure of the bolt and the nut at one end of the opening, so that the installation connecting plate 5 is in a fixed state, and the height from the bottom surface meets the height of the subsequent installation. In use, the convex slide block 4 and the first convex slide groove 6 can be matched and slid according to the situation, and the installation connecting plate 5 is in a fixed state by increasing the structure.

[0052] In the process of use, the span of the site is large, which causes the distance between the two adjacent installation support rods 2 to be too large, so that in the process of use, the adjacent end of the installation plate 7 can be gradually away from the state under the action of the installation connecting plate 5, and the installation plate 7 and the connecting support plate 9 can be ensured to be in a pulling state under the action of the spring 11, and the connecting support plate 9 cannot be randomly pulled out, thereby ensuring the stability of the structure. Moreover, through the cooperation of the connecting support plate 9 and the spring 11, the adjacent two installation plates 7 have a certain elastic connection effect. In the installation process, even if the distance between the two adjacent installation support rods 2 changes due to the large span of the site, the installation plate 7 can be adjusted accordingly under the elastic action of the spring 11, thereby maintaining the overall stability and firmness.

[0053] The operator can drive the worm 19 to rotate by rotating the knob 20, and the meshing relationship between the worm 19 and the worm gear 18 enables the worm gear 18 to drive the rotating shaft 15 to rotate. With the rotation of the rotating shaft 15, the connecting rotating shaft 16 also rotates, thereby driving the limiting support block 17 to swing around the connecting rotating shaft 16, and thereby abutting the outer side of the transformer body 29, so as to realize the supporting operation.

[0054] Then, the operator can manually move the two T-shaped connecting rods 26 and the second sliding rod 27 towards each other, so that the tensile spring 24 is stretched and deformed.

[0055] At this time, the T-shaped connecting rod 26 will slide out of the T-shaped mounting slot 28, so that the connecting rod 22 can rotate around the vertical rod 21.

[0056] Subsequently, the operator can adjust the state of the connecting rod 22 according to the specific size and shape of the transformer body 29, so that it perfectly abuts the upper end surface of the transformer body 29.

[0057] After completion, the operator makes the T-shaped connecting rod 26 and the second sliding rod 27 engage together, and at this time the tensile spring 24 will recover under the action of its own deformation.

[0058] So that the T-shaped connecting rod 26 and the T-shaped mounting slot 28 can better engage together, thereby being able to press the transformer body 29, thereby realizing the overall protection operation.

[0059] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An anti-tilt bracket for installation on a pole-mounted DC converter transformer, characterized by: The system includes four mounting support rods (2), and the transformer body (29) is provided on the inner side of the upper end of the four mounting support rods (2). The inner sides of the two mounting support rods (2) are provided with mounting plates (7), and the upper surfaces of the mounting plates (7) are fixedly mounted with symmetrical mounting plates (14). The inner sides of the two horizontally adjacent mounting plates (14) are each provided with a connecting shaft (16) in a stinger state. A limiting bracket block (17) is provided on the outer side of the connecting shaft (16), and the inner side of the limiting bracket block (17) and the outer side of the transformer body (29) are in a close fit.

2. An anti-tilt mount for a pole-mounted DC converter transformer installation according to claim 1, characterized in that: Cement piles (1) are fixedly installed on the lower outer surface of the mounting support rod (2), and symmetrical semi-clamping rings (3) are provided on the upper outer circumferential surface of the mounting support rod (2). The semi-clamping rings (3) are arranged in pairs and form a ring structure.

3. An anti-tilt mount for a pole-mounted DC converter transformer installation according to claim 2, characterized in that: A cylinder is fixedly installed on the inner side of one end of each of the two semi-clamping rings (3), and a convex slider (4) is installed on the circumference of the two cylinders. An installation connecting plate (5) is provided on the inner side of the mounting support rod (2).

4. The anti-tilt bracket for pole-mounted DC converter transformer installation according to claim 3, characterized in that: The outer side of the mounting connecting plate (5) is provided with a first convex groove (6) at equal intervals from one end to the other. The end of the convex slider (4) away from the half-clamp (3) is slidably installed inside the first convex groove (6). The lower end of the mounting connecting plate (5) and the upper end of the adjacent mounting plate (7) are fixedly connected by bolts.

5. The anti-tilt bracket for pole-mounted DC converter transformer installation according to claim 1, characterized in that: A through-hole (8) is provided on the lower end face of each of the two horizontally adjacent mounting plates (7). A connecting support plate (9) is slidably installed inside the two horizontally adjacent through-holes (8). A protrusion (10) is fixedly installed at both ends of the connecting support plate (9). A spring (11) is fixedly installed between the inner side of the protrusion (10) and the lower end face of the mounting plate (7) and at the outer edge of the through-hole (8).

6. The anti-tilt bracket for mounting a pole-mounted DC converter transformer according to claim 1, characterized in that: A longitudinal connecting plate (12) is fixedly installed between the inner sides of the two mounting plates (7) at the front and rear. Anti-slip mounting rods (13) are fixedly installed at equal intervals on the upper surface of the longitudinal connecting plate (12). The upper surface of the anti-slip mounting rods (13) and the transformer body (29) are fixedly connected by bolts.

7. The anti-tilt bracket for pole-mounted DC converter transformer installation according to claim 1, characterized in that: A rotating shaft (15) is rotatably mounted on the upper inner side and the middle inner side of each of the two adjacent mounting plates (14). A worm gear (18) is fixedly mounted on one end of the rotating shaft (15) and on the outer side of the mounting plate (14).

8. The anti-tilt bracket for pole-mounted DC converter transformer installation according to claim 1, characterized in that: A worm gear (19) is rotatably mounted on the inner side of the mounting plate (14). The worm gear (19) meshes with the adjacent worm wheel (18). A knob (20) is fixedly mounted on one end of the outer side of the worm gear (19).

9. An anti-tilt bracket for mounting a pole-mounted DC converter transformer according to claim 7, characterized in that: A connecting shaft (16) is fixedly installed on the circumferential surface of the rotating shaft (15). The inner side of the end of the connecting shaft (16) away from the rotating shaft (15) is rotatably connected to the limiting bracket block (17).

10. An anti-tilt bracket for mounting a pole-mounted DC converter transformer according to claim 9, characterized in that: The upper surface of the mounting plate (7) is fixedly mounted with a vertical rod (21). The upper end of the vertical rod (21) is rotatably mounted with a connecting rod (22). The end of the connecting rod (22) away from the vertical rod (21) is provided with a cavity groove (23). The cavity groove (23) is fixedly mounted with a tension spring (24). The outer end of the two front tension springs (24) is fixedly mounted with a first slide rod (25). The end of the first slide rod (25) away from the tension spring (24) is fixedly mounted with a T-shaped connecting rod (26). The outer end of the two rear tension springs (24) is fixedly mounted with a second slide rod (27). The upper side of the end of the second slide rod (27) away from the tension spring (24) is provided with a T-shaped mounting groove (28) from the upper side to the lower end. The T-shaped mounting groove (28) and the T-shaped connecting rod (26) engage. The lower end of the T-shaped mounting groove (28) and the T-shaped connecting rod (26) are in contact with the upper end of the transformer body (29).

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