High-voltage switch shell welding tool

Abstract

The invention discloses a high-voltage switch shell welding tool, and relates to the technical field of welding tools. The high-voltage switch shell welding tool comprises fixed vertical plates arranged in four directions, an X-axis moving vertical plate and two sets of Y-axis moving vertical plates, the fixed vertical plates and the X-axis moving vertical plates clamp long joints, the high-voltage switch shell welding tool further comprises an outer shaft, one end of the outer shaft is rotationally installed on the fixed vertical plates, the other end of the outer shaft is carried on the X-axis moving vertical plate, and the Y-axis moving vertical plates are arranged on the outer shaft. The outer shaft is positioned in the long section and is concentric with the long section; an elastic inner support structure; according to the welding tool for the high-voltage switch shell, the tension of the two short sections forms a balanced closed loop in a system in an opposite-pulling mode, the force acting on the two sides of the long section is equal in magnitude, opposite in direction and mutually counteracted, it is ensured that the contact pressure of the two short sections and the long section is completely uniform, and a foundation is laid for obtaining the uniform and consistent welding penetration depth; and the coaxiality and the involution precision are fundamentally ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding tooling, in particular to a high-voltage switch shell welding tooling. BACKGROUND

[0002] SF6 gas insulated high-voltage switch in the high-voltage switch shell is a key equipment in the power system, and the SF6 gas insulated high-voltage switch shell bears the important functions of accommodating the arc-extinguishing chamber, insulator, conductor and other core components and providing reliable sealing to ensure the pressure stability and insulation performance of the SF6 insulation gas. Among them, the "expansion part" of the shell, such as the three-way or four-way branch structure (usually welded by the main pipe "long section" and the branch pipe "short section") connecting the busbar, cable terminal or installing the mutual inductor, is a key component for forming a complete airtight cavity and realizing electrical communication and function expansion.

[0003] Such four-way structure 7 is shown in Figure 1 and Figure 2 The welding quality directly determines the overall sealing, mechanical strength and long-term operation reliability of the high-voltage switch shell. In the prior art, the welding of the shell expansion part is usually positioned and fixed by using general tooling. Generally, the long section and the short section are first fixed on the corresponding tooling load seat, and then the load seat is moved to make the long section and the short section close to each other, and the short section is pressed on the long section using the pressure of the cylinder or hydraulic cylinder.

[0004] This way generally has the following problems: the tooling body is under severe stress, the top pressure is completely borne by the tooling frame, and two opposite short sections are pressed from both sides, usually two independent top pressing devices are needed. It is difficult to ensure that the top pressure of the two devices is completely synchronous and equal, which causes uneven stress on both sides of the long section and aggravates the risk of misalignment.

[0005] In addition, the traditional welding sequence is generally to fix the long section and each short section respectively and then try to butt joint them, which lacks effective pre-positioning and elastic adjustment mechanism: before final locking, there is no flexible support mechanism to allow the short section to have a small amount of radial and axial floating to adapt to the alignment of the long section opening. It often needs to use additional jacks, levers and other tools for rough adjustment, which is not only cumbersome and has safety hazards, but also difficult to achieve precise and stress-free butt joint. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides a high-voltage switch shell welding tooling, which solves the problem of uneven stress on both sides of the long section.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a welding fixture for a high-voltage switch housing, comprising fixed vertical plates arranged in four directions, an X-axis movable vertical plate, and two sets of Y-axis movable vertical plates, wherein the fixed vertical plates and the X-axis movable vertical plates clamp a long section; and further comprising: an outer shaft, one end of which is rotatably mounted on the fixed vertical plate, and the other end mounted on the X-axis movable vertical plate, wherein the outer shaft is located within the long section and concentric with the long section; and an elastic inner support structure, wherein the elastic inner support structure is disposed on the Y-axis movable vertical plate, and the elastic inner support structure is capable of supporting the long section. The system includes a short section pre-support, which can also move on the elastic inner support structure to adjust its position; a first counter-pull gear, which is mounted on the outer shaft and opposite to the short section; a pressure plate, which is mounted on the side of the elastic inner support structure near the Y-axis moving plate; and a toothed tie rod, which is mounted on the elastic inner support structure. When the first counter-pull gear rotates with the outer shaft, it can pull the toothed tie rod, causing the toothed tie rod to apply tension to the pressure plate through the elastic inner support structure, forming a state of two sets of short sections pulling against each other.

[0008] Furthermore, it also includes a second counter-rotating gear, and the outer shaft is also provided with an inner shaft. The fixed plate is provided with a drive structure for first driving the outer shaft to rotate and then driving the inner shaft to rotate. The second counter-rotating gear is fixed on the inner shaft. The elastic inner support structure is also provided with a locking structure. The rotation of the inner shaft is used to drive the locking structure to lock the elastic inner support structure, so that the elastic inner support structure no longer has elasticity and maintains the position of the short section in a rigid support posture.

[0009] Furthermore, the first pull gear has teeth on both sides and no teeth in the remaining positions; the second pull gear has teeth on both sides and no teeth in the remaining positions.

[0010] Furthermore, the elastic inner support structure includes a main column, which is fixed on a Y-axis movable vertical plate. The outer surface of the main column is provided with an outer cylinder in a radial pattern. An inner support column is inserted into the outer cylinder, and a spring is sleeved on the portion of the inner support column located inside the outer cylinder.

[0011] Furthermore, the locking structure includes: The carrier plate is located inside the main column. A rack plate is fixed on the side of the carrier plate near the pull gear 2, and the rack plate 2 is located outside the main column. The rack plate 2 is adapted to the pull gear 2. A conical head, which is mounted on the side of the carrier plate away from the rack plate two via a two-degree-of-freedom bracket; An electromagnet is fixed on the side of the conical head away from the carrier plate. The main column is equipped with a disk adapted to the electromagnet, and the area of ​​the disk is larger than that of the electromagnet.

[0012] Furthermore, a second spring is installed on the side of the conical head away from the carrier plate, and the end of the second spring near the disk is fixed inside the main column.

[0013] Further, the double-degree-of-freedom support comprises a Z-axis sliding rod fixed on the carrier plate, a Z-axis sliding block slidingly arranged on the Z-axis sliding rod, and an X-axis sliding rod mounted on the Z-axis sliding block, and the conical head is slidingly arranged on the X-axis sliding rod.

[0014] Further, the X-axis moving vertical plate and the Y-axis moving vertical plate are both provided with a ground rail, and the X-axis moving vertical plate and the Y-axis moving vertical plate are both capable of actively sliding on the ground rail.

[0015] Further, the X-axis moving vertical plate and the fixed vertical plate are both provided with a positioning disc, and a pre-clamping structure is mounted on the positioning disc, and the pre-clamping structure is used for fixing the long section on the positioning disc.

[0016] Further, the driving structure comprises a second bidirectional bevel gear fixed at one end of the outer shaft close to the fixed vertical plate, a first bidirectional bevel gear fixed at one end of the inner shaft close to the fixed vertical plate, a driving bevel gear meshing with the first bidirectional bevel gear or the second bidirectional bevel gear, the driving bevel gear being mounted on a bearing seat, and a motor capable of driving the driving bevel gear to rotate being arranged on the bearing seat, and a cylinder used for pushing and pulling the motor.

[0017] The application has the following beneficial effects: (1) The high-voltage switch shell welding tool balances the pulling force of the two short sections in the system through the pulling mode, so that the tool has small stress and small deformation; most of the force is balanced in the tooth-shaped pulling rod and the pulling gear, and the force transmitted to the tool is very small, so that the tool can be lighter, the rigidity requirement is reduced, the precision is easier to maintain, and the two short sections are symmetrically pulled to the center through the pulling gear, the force acting on the two sides of the long section is equal in size and opposite in direction, and is cancelled out, so that the contact pressure of the two short sections and the long section is completely uniform, which lays a foundation for obtaining uniform welding penetration depth, eliminates welding defects caused by uneven pressure, and the long section is almost not disturbed by additional bending moment, and the initial fixed position is perfectly maintained during the pressing process, so that the coaxiality and the matching precision are fundamentally ensured.

[0018] (2), the high-voltage switch shell welding tool, through the inner support column is connected with the outer cylinder by spring one, when the short section is placed on the elastic inner support structure, the elastic force of spring one can form uniform pre-support to the short section, and when it is necessary to adjust the position of the short section to align the opening of the long section, the operator only needs to manually push slightly along the radial or axial direction of the short section, the inner support column will slide along the outer cylinder within the elastic range of spring one, driving the short section to move synchronously, this process completely relies on the self-adaptive floating of the elastic structure, without the help of jack, crowbar and other additional tools. And after the closure is completed, the locking structure locks the state of the elastic inner support structure, that is, the elastic inner support structure can rigidly support the position of the adjusted short section, improving the stability of the short section.

[0019] Of course, implementing any product of the present application does not necessarily require all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 SF6 gas insulated high-voltage switch shell in the prior art high-voltage switch shell; Figure 2 is a sectional view of Figure 1 ; Figure 3 is a whole view of the present application; Figure 4 is a schematic view of the present application Figure 3 without installing the Y-axis moving vertical plate; Figure 5 is a schematic view of the fixed vertical plate of the present application; Figure 6 is an enlarged view of area A of the present application Figure 5 ; Figure 7 is a view of the relative position of the pulling structure and the outer shaft of the present application; Figure 8 is an exploded view of the pulling structure of the present application; Figure 9 is a sectional view of the arc-shaped shell of the present application; Figure 10 is a view of the state of the short section assembled on the Y-axis vertical plate of the present application; Figure 11 is an assembly view of the elastic inner support structure and the locking structure of the present application; Figure 12 is a structural schematic view of the double-degree-of-freedom support of the present application; Figure 13 is a view of the cooperation of the toothed pulling rod, the rack plate two and the pulling structure on a single main column of the present application; Figure 14 is a view of the state of the toothed pulling rod on both sides of the pulling structure of the present application; Figure 15The state diagram of the short section pre-fixed on the elastic inner support structure of the application; Figure 16 The position diagram of the elastic inner support structure and the tapered head after adjusting the position of the short section of the application; Figure 17 The assembly diagram of the driving structure of the application; Figure 18 The partial diagram of the application Figure 17 ; Figure 19 The meshing diagram of the driving bevel gear and the second bidirectional bevel gear of the application.

[0021] In the figure, 1, ground rail; 2, tooth-shaped pull rod; 31, fixed vertical plate; 32, X-axis moving vertical plate; 33, Y-axis moving vertical plate; 4, pre-clamping structure; 41, fixed plate; 42, fixed bolt; 43, horizontal plate; 44, sliding groove one; 45, sliding plate; 5, driving structure; 51, air cylinder; 52, motor; 53, first bidirectional bevel gear; 54, second bidirectional bevel gear; 55, driving bevel gear; 56, bearing seat; 57, limiting tooth part; 6, pull structure; 61, arc-shaped shell; 62, limiting cover plate; 63, pull gear one; 631, connecting rod; 64, connecting column; 65, support; 66, pull gear two; 7, four-way structure; 71, long section; 72, first flange; 73, short section; 74, second flange; 8, elastic inner support structure; 81, inner support column; 82, outer cylinder; 83, spring one; 84, main column; 9, locking structure; 91, tapered head; 92, spring two; 93, electromagnet; 94, magnetic disk; 95, double-degree-of-freedom support; 951, Z-axis sliding rod; 952, Z-axis sliding block; 953, X-axis sliding rod; 96, rack plate two; 97, sliding block; 98, carrier plate; 10, positioning disc; 11, outer shaft; 12, inner shaft; 13, pressure plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0023] In the description of the application, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0024] The following is based on Figures 1-19 The high-voltage switch shell welding tool provided by the embodiment of the application is described below.

[0025] Please refer to Figures 1-4 The high-voltage switch shell welding tool provided by the embodiment of the application includes four fixed vertical plates 31, an X-axis moving vertical plate 32, and two groups of Y-axis moving vertical plates 33. The fixed vertical plate 31 is opposite to the X-axis moving vertical plate 32, and the two groups of Y-axis moving vertical plates 33 are opposite to each other. The fixed vertical plate 31 and the X-axis moving vertical plate 32 can clamp the long section 71, and each Y-axis moving vertical plate 33 locks a short section 73. A ground rail 1 is arranged on the ground. The ground rail 1 of the Y-axis moving vertical plate 33 is in the Y-axis direction, and the ground rail 1 of the X-axis moving vertical plate 32 is in the X-axis direction. When fixed, the long section 71 should be fixed first, and then the short section 73 is fixed. Process one: first, fix one end of the long section 71 on the fixed vertical plate 31 (for details of the fixing method, see the description of the pre-clamping structure 4 below), then gradually move the X-axis moving vertical plate 32 on the ground rail 1 in the X-axis direction and close to the fixed vertical plate 31, and then fix the other end of the long section 71 on the X-axis moving vertical plate 32. Process two: support the two short sections 73 on the two Y-axis moving vertical plates 33, and then gradually move the Y-axis moving vertical plates 33 on the ground rail 1 in the Y-axis direction and gradually close to the long section 71. The movement of each vertical plate on the ground rail 1 can be driven by an electric linear guide rail.

[0026] In combination with Figure 7 and Figure 8 , the method for fixing the long section 71 in process one described above is a common method in the prior art. Specifically, a positioning disc 10 is arranged on the fixed vertical plate 31 and the X-axis moving vertical plate 32, and a pre-clamping structure 4 is installed on the positioning disc 10. The pre-clamping structure 4 is used to fix the long section 71 on the positioning disc 10.

[0027] In this embodiment, the pre-clamping structure 4 includes a fixed plate 41 welded or bolted on the positioning disc 10. A horizontal plate 43 is arranged at one end of the fixed plate 41 away from the center of the positioning disc 10. A sliding groove one 44 is formed on the horizontal plate 43. A sliding plate 45 is arranged in the sliding groove one 44 and can slide along the sliding groove one 44. The sliding plate 45 can rotate after being slid to a suitable position. When the sliding plate 45 is rotated and opened, the first flange 72 of the long section 71 can be placed between the sliding plate 45 and the fixed plate 41. Then, the fixed bolt 42 is used to lock the sliding plate 45 and the fixed plate 41, so as to achieve the purpose of locking the long section 71 between the fixed vertical plate 31 and the X-axis moving vertical plate 32.

[0028] In combination with Figures 7-14As shown, in order to achieve the above-mentioned process two, the purpose of achieving the state of two short sections 73 being pressed on the long section 71 in a pulling manner and the short sections 73 being able to completely match the openings on the long section 71, the high-voltage switch shell welding tool provided by the embodiment of the present application further comprises an outer shaft 11, an elastic inner support structure 8, a pulling structure 6, a pressure plate 13 and a toothed pulling rod 2.

[0029] One end of the outer shaft 11 is rotatably installed on the fixed vertical plate 31 and can actively rotate on the fixed vertical plate 31, and the other end is loaded on the X-axis moving vertical plate 32, and the outer shaft 11 is located in the long section 71 and concentric with the long section 71. The pulling structure 6 comprises a pulling gear one 63, which is installed on the outer shaft 11 and opposite to the short section 73. When the outer shaft 11 rotates, it can drive the pulling gear one 63 to rotate, and the rotating force of the pulling gear one 63 is the pulling force of the two short sections 73.

[0030] The above-mentioned elastic inner support structure 8 is arranged on the Y-axis moving vertical plate 33 and has elasticity, which can pre-support the short section 73. Based on this elasticity, the supported short section 73 can be adjusted in the radial and axial directions, which is convenient for matching the openings of the long section 71.

[0031] In order to achieve the above-mentioned pulling, the above-mentioned pressure plate 13 is installed on one side of the elastic inner support structure 8 close to the Y-axis moving vertical plate 33, and the toothed pulling rod 2 is installed on the elastic inner support structure 8. When the pulling gear one 63 rotates with the outer shaft 11, it can pull the toothed pulling rod 2, so that the toothed pulling rod 2 applies a pulling force to the pressure plate 13 through the elastic inner support structure 8. Further, the pulling force can press the two short sections 73 on the long section 71 in a pulling manner. Through the pulling, the pulling force of the two short sections 73 forms a balanced closed loop in the system, so that the force on the tool is small and the deformation is small. Most of the force is balanced internally between the toothed pulling rod 2 and the pulling gear one 63, and the force transmitted to the tool is very small. Therefore, the tool can be lighter, the rigidity requirement is reduced, the precision is easier to maintain, and the two short sections 73 are symmetrically pulled to the center through the pulling gear one 63. The force acting on the two sides of the long section 71 is equal in size and opposite in direction, and is cancelled out, which ensures that the contact pressure of the two short sections 73 and the long section 71 is completely uniform, lays a foundation for obtaining uniform welding penetration depth, eliminates welding defects caused by uneven pressure, and the long section 71 is almost not disturbed by additional bending moments, and its initial fixed position is perfectly maintained during the pressing process, which fundamentally guarantees the coaxiality and matching precision.

[0032] Regarding the above process two, (1) first, the two groups of short sections 73 are pre-supported on the Y-axis moving vertical plate 33 through the elastic inner support structure 8, and the Y-axis moving vertical plate 33 is gradually moved close to the long section 71 on the ground rail 1 until the short section 73 contacts the long section 71; (2) the position of the short section 73 is manually fine-tuned so that the short section 73 is matched with the opening of the long section 71; (3) the two short sections 73 are controlled to be pressed on the long section 71 in the form of pulling, so as to fix the relative position of the long section 71 and the short section 73.

[0033] Therefore, the high-voltage switch shell welding tool provided by the embodiment of the present application can first pre-support the short section 73, so that the position of the short section 73 can be fine-tuned, and then the short section 73 is pressed on the long section 71 in the form of pulling after fine-tuning, that is, the accuracy of matching is ensured, and the pressing degree of the short section 73 is ensured in the form of pulling.

[0034] Combining Figures 7-14 As shown in the figure, in order to further strengthen the support for the short section 73 in space after the pulling is completed, and ensure the stability of the short section 73 during the welding process of the worker, a locking structure 9 capable of converting the elastic support of the elastic inner support structure 8 into rigid support after the pulling is completed is also arranged, an inner shaft 12 is further arranged in the outer shaft 11, the inner shaft 12 is concentric with the outer shaft 11, and both have the ability of free circumferential rotation, the pulling gear two 66 is fixed on the inner shaft 12, and the inner shaft 12 rotates to drive the locking structure 9 to lock the elastic inner support structure 8, so that the elastic inner support structure 8 no longer has elasticity, thereby realizing the process of converting the elastic support of the elastic inner support structure 8 into rigid support, and realizing the process of locking the position of the short section 73 in the form of rigid support.

[0035] Preferably, the driving structure 5 for driving the outer shaft 11 to rotate first and then driving the inner shaft 12 to rotate is arranged on the fixed vertical plate 31, which is characterized by controlling the pulling gear one 63 to pull the two groups of short sections 73 first, and then controlling the locking structure 9 to lock the elasticity of the elastic inner support structure 8, that is, the short section 73 is first axially tensioned, and then the short section 73 is further rigidly supported by the elastic inner support structure 8, so as to ensure the position stability of the short section 73 during welding, and avoid shaking of the short section 73.

[0036] Preferably, the two sides of the pulling gear one 63 are provided with tooth portions, and the remaining positions are toothless.

[0037] The pulling gear one 63 is provided with tooth portions only on the two sides, and the purpose is that when the pulling gear one 63 and the pulling gear two 66 are in the initial position, the tooth-shaped pulling rods 2 on the two groups of short sections 73 are respectively moved to the positions directly below and directly above the pulling gear one 63, and the toothless part can avoid interference with the movement path of the tooth-shaped pulling rods 2.

[0038] As Figure 11As shown, the elastic inner support structure 8 mentioned above comprises a main column 84 (the toothed opposite pull rod 2 is fixed on the main column 84), the main column 84 is preferably a transverse cylindrical structure, the main column 84 is fixed on the Y-axis moving vertical plate 33, the outer surface of the main column 84 is provided with an outer cylinder 82 in a radial manner, the inner support column 81 is inserted in the outer cylinder 82, the part of the inner support column 81 located in the outer cylinder 82 is sleeved with the spring one 83, in the pre-fixing stage of the elastic inner support structure 8 to the short section 73, due to the action of the spring one 83, each inner support column 81 can move axially in the inner part of the outer cylinder 82, so that the position of the short section 73 in this stage can be slightly adjusted, for reference Figure 15 , the initial state of the short section 73 supported on the elastic inner support structure 8, after the short section 73 approaches the long section 71, the position of the short section 73 needs to be adjusted, at this time, the position is manually adjusted, for example, in Figure 16 , the position adjustment of the short section 73 is completed in the state shown, at this time, the short section 73 is closed on the opening of the long section 71, at this time, the rotation of the opposite pull gear one 63 is controlled, the two short sections 73 are pulled tightly on the long section 71, then the rotation of the opposite pull gear two 66 is controlled, the state that the locking structure 9 locks the elastic inner support structure 8 is realized, that is, the elastic inner support structure 8 at this time maintains Figure 16 , the state of rigidly supporting the short section 73.

[0039] It should be noted that the diameter of the circle composed of the ends of the plurality of inner support columns 81 away from the main column 84 should be equal to the inner diameter of the short section 73, when the short section 73 is sleeved outside the virtual circular structure composed of the plurality of inner support columns 81, each spring one 83 is essentially not compressed or stretched.

[0040] As shown in Figure 11 and Figure 12 , the locking structure 9 mentioned above comprises a carrier plate 98, a conical head 91 and an electromagnet 93.

[0041] The carrier plate 98 is located in the main column 84, the carrier plate 98 can slide axially in the main column 84, the side of the carrier plate 98 close to the opposite pull gear two 66 is fixed with a rack plate two 96, the lower part of the rack plate two 96 is provided with a sliding block 97, the sliding block 97 can slide in the main column 84, and a part of the rack plate two 96 is located outside the main column 84, the rack plate two 96 is matched with the opposite pull gear two 66, when the opposite pull gear two 66 rotates, the rack plate two 96 can be pulled to make the carrier plate 98 slide along the axial direction of the main column 84, the conical head 91 is installed on the side of the carrier plate 98 away from the rack plate two 96 through a two-degree-of-freedom support 95, the electromagnet 93 is fixed on the side of the conical head 91 away from the carrier plate 98, the main column 84 is provided with a magnetic disk 94 matched with the electromagnet 93, and the area of the magnetic disk 94 is larger than that of the electromagnet 93.

[0042] In this embodiment, the end of the plurality of inner support columns 81 close to the conical head 91 contacts the conical head 91, and Figure 16The position of the short section 73 is adjusted in the shown state, and the adjustment method is as follows: the staff manually pushes the short section 73 along each radial direction of the short section 73, so that the short section 73 is aligned with the opening of the long section 71, and in this process, the inner wall of the short section 73 pushes the inner support column 81, the inner support column 81 pushes the conical head 91, and because the conical head 91 can move vertically and horizontally on the carrier plate 98 through the double-degree-of-freedom support 95, the position of the conical head 91 and the electromagnet 93 changes with the position change of the inner support column 81, as shown in Figure 15 and Figure 16 are different positions of the conical head 91 in different states, but the center of the conical head 91 is always at the center of the short section 73.

[0043] When the rack plate two 96 is pulled by the pull gear two 66, the carrier plate 98 can pull the conical head 91 through the double-degree-of-freedom support 95, so that the conical head 91 can exert pressure on the inner wall of the inner support column 81, and at this time, the electromagnet 93 is controlled to be energized, the electromagnet 93 is attracted to the magnetic disc 94, thereby locking the spatial position of the conical head 91, and in the case that the position of the conical head 91 is locked, the extension length of each inner support column 81 is maintained in the state after the position of the short section 73 is adjusted, that is, the inner support column 81 can support the short section 73 at the adjusted position.

[0044] As shown in Figure 12 The double-degree-of-freedom support 95 described above includes a Z-axis sliding rod 951 fixed on the carrier plate 98, a Z-axis sliding block 952 slidingly arranged on the Z-axis sliding rod 951, an X-axis sliding rod 953 installed on the Z-axis sliding block 952, and the conical head 91 slidingly arranged on the X-axis sliding rod 953.

[0045] Preferably, in order to ensure that the conical head 91 can be axially reset when it is not subjected to the pulling force of the carrier plate 98, a second spring 92 is installed on the side of the conical head 91 away from the carrier plate 98, and one end of the second spring 92 close to the magnetic disc 94 is fixed in the main column 84 (it should be noted that the radial reset of the conical head 91 relies on the first spring 83 on the inner support column 81).

[0046] In addition, it should be noted that the pull structure 6 in the embodiment also includes an arc-shaped shell 61 located on the outer shaft 11, and the upper and lower sides of the arc-shaped shell 61 are fixed with a limiting cover plate 62 through a connecting column 64. The outer shaft 11 is rotatably installed on the arc-shaped shell 61 through a bearing. Actually, two groups of pull gears one 63 are arranged, and two toothed pull rods 2 are also arranged on the elastic inner support structure 8 in a single short section 73, and the two toothed pull rods 2 are symmetrically arranged on the main column 84 of the elastic inner support structure 8, so as to keep the force stable during pulling.

[0047] The arc-shaped shell 61 is fixed on the positioning disc 10 through the support 65, and the two opposite draw gears 63 are fixed through the connecting rod 631 which is located on the two sides of the opposite draw gear 63. The position does not affect the toothed draw rod 2 entering the opposite draw gear 63 above and below, nor does it affect the subsequent rack plate 96 entering the opposite draw gear 66 above and below. The rotation angle of the opposite draw gear 63 and the opposite draw gear 66 is very small, so even if the two gears rotate, they will not touch the connecting rod 631, that is, the connecting rod 631 will not affect the draw action of the opposite draw gear 63 and the opposite draw gear 66.

[0048] In combination Figures 17-19 As shown, in order to achieve the purpose of driving the outer shaft 11 to rotate first and then driving the inner shaft 12 to rotate, the driving structure 5 includes a second double bevel gear 54, a first double bevel gear 53, a driving bevel gear 55 and a cylinder 51.

[0049] In this embodiment, the second double bevel gear 54 is fixed on the outer shaft 11 near one end of the fixed vertical plate 31, the first double bevel gear 53 is fixed on the inner shaft 12 near one end of the fixed vertical plate 31, the driving bevel gear 55 is engaged with the first double bevel gear 53 or the second double bevel gear 54, the driving bevel gear 55 is installed on the bearing seat 56, the bearing seat 56 is provided with a motor 52 capable of driving the driving bevel gear 55 to rotate, and the cylinder 51 is used to push and pull the motor 52. When the cylinder 51 pushes the motor 52, the bearing seat 56 drives the driving bevel gear 55 to engage with the second double bevel gear 54, at this time the driving bevel gear 55 is in a state of rotating the outer shaft 11 through the second double bevel gear 54. When the cylinder 51 pulls the motor 52, the bearing seat 56 drives the driving bevel gear 55 to engage with the first double bevel gear 53, at this time the driving bevel gear 55 is in a state of rotating the inner shaft 12 through the first double bevel gear 53, that is, the independent rotation of the inner shaft 12 and the outer shaft 11 can be realized.

[0050] In order to realize that when the driving bevel gear 55 is separated from the first double bevel gear 53 and gradually approaches the second double bevel gear 54, the first double bevel gear 53 can remain in a non-rotating state (this non-rotating state represents that the opposite draw gear 63 does not rotate to pull the toothed draw rod 2 with inherent force), and vice versa, in order to realize that when the driving bevel gear 55 is separated from the second double bevel gear 54 and gradually approaches the first double bevel gear 53, the second double bevel gear 54 can remain in a non-rotating state (this non-rotating state represents that the opposite draw gear 66 does not rotate), in this embodiment, limit teeth 57 are fixed on both sides of the bearing seat 56, which are used to block the double bevel gear (any one of the second double bevel gear 54 and the first double bevel gear 53) that is not engaged with the driving bevel gear 55.

[0051] In use (working), step one, first lock one end of the long section 71 on the fixed vertical plate 31 through the pre-clamping structure 4, then gradually move the X-axis moving vertical plate 32 on the ground rail 1 in the X-axis direction and close to the fixed vertical plate 31, and then use the pre-clamping structure 4 on the X-axis moving vertical plate 32 to fix the other end of the long section 71, so as to realize the position fixation of the whole long section 71. Step two, support the two short sections 73 on the elastic inner support structure 8 on the two Y-axis moving vertical plates 33 respectively, then gradually move the Y-axis moving vertical plate 33 on the ground rail 1 in the Y-axis direction and gradually close to the long section 71, until the short section 73 contacts the long section 71, at this time the tooth-shaped counter-pulling rod 2 has reached the position of the counter-pulling gear one 63, and the rack plate two 96 has reached the position of the counter-pulling gear two 66, the staff manually pushes the short section 73 along each radial direction of the short section 73 to align the short section 73 with the opening of the long section 71, in this process, the inner wall of the short section 73 pushes the inner support column 81, the inner support column 81 pushes the conical head 91, and since the conical head 91 can move vertically and horizontally on the carrier plate 98 through the double-degree-of-freedom support 95, the position of the conical head 91 and the electromagnet 93 changes with the position change of the inner support column 81, until the short section 73 is aligned with the opening of the long section 71, for example Figure 17 In this state, the short section 73 is completely aligned with the opening of the long section 71, at this time the control driving structure 5 drives the outer shaft 11 to rotate, so that the counter-pulling gear one 63 can pull the tooth-shaped counter-pulling rod 2, thereby the main column 84 pulls the pressure plate 13 to press the second flange 74 to press the whole short section 73 on the long section 71, thus completing the counter-pulling action, that is, completing the initial fixation of the short section 73; Step three, control the inner shaft 12 to rotate by the driving structure 5, when the rack plate two 96 is pulled by the counter-pulling gear two 66, the carrier plate 98 can pull the conical head 91 through the double-degree-of-freedom support 95, so that the conical head 91 can exert pressure on the inner wall of the inner support column 81, then control the electromagnet 93 to be electrified, the electromagnet 93 is adsorbed on the magnetic disc 94, thereby locking the spatial position of the conical head 91, in the case that the position of the conical head 91 is locked, the extension length of each inner support column 81 is maintained in the state after adjusting the position of the short section 73, that is, the inner support column 81 can rigidly support the short section 73 at the adjusted position, ensuring the stability of the short section 73 during welding.

[0052] In summary, the process of pre-supporting, fine-tuning, counter-pulling and locking can be realized, which not only ensures the balanced stress of the long section 71, but also maintains the precision of the joint.

[0053] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other presenters can develop. It is also possible, however, that only a single element can be present. It is further noted that such a term as "comprising" is intended to mean that the embodiments include the recited elements, but not excluding other elements. "Consisting essentially of when used herein in relation to a composition, means that the composition includes the recited elements, and can include additional elements, so long as the additional elements do not materially alter the basic and novel characteristics of the claimed composition. "Consisting of" when used herein in relation to a composition, means that the composition includes the recited elements, and no additional elements.

[0054] The preferred embodiments of the application disclosed above are only to help explain the principles of the present application. The preferred embodiments do not describe all the details of the present application, nor limit the present application to only the specific embodiments described. It is apparent that many modifications and variations can be made to the present application based on the content of the present disclosure. The present disclosure selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A welding fixture for a high-voltage switch housing, characterized in that, Including fixed vertical plates (31) arranged in four directions, X-axis movable vertical plates (32) and two sets of Y-axis movable vertical plates (33), the fixed vertical plates (31) and the X-axis movable vertical plates (32) clamp the long section (71), and also including: An outer shaft (11) is rotatably mounted on a fixed vertical plate (31) at one end and mounted on an X-axis movable vertical plate (32) at the other end. The outer shaft (11) is located inside a long section (71) and is concentric with the long section (71). The elastic inner support structure (8) is located on the Y-axis movable vertical plate (33). The elastic inner support structure (8) can pre-support the short section (73). The short section (73) can also move on the elastic inner support structure (8) to adjust the position of the short section (73). Pull-up gear one (63), said pull-up gear one (63) is mounted on the outer shaft (11) and is opposite to the short section (73); Pressure plate (13), said pressure plate (13) is installed on the side of the elastic inner support structure (8) near the Y-axis moving vertical plate (33); Toothed tie rod (2) is mounted on elastic inner support structure (8). When the tie gear (63) rotates with the outer shaft (11), it can pull the toothed tie rod (2), so that the toothed tie rod (2) applies tension to the pressure plate (13) through the elastic inner support structure (8), forming a state of two sets of short sections (73) pulling against each other.

2. The high-voltage switch housing welding fixture according to claim 1, characterized in that, It also includes a second counter-rotating gear (66), and the outer shaft (11) is also provided with an inner shaft (12). The fixed plate (31) is provided with a drive structure (5) for first driving the outer shaft (11) to rotate and then driving the inner shaft (12) to rotate. The second counter-rotating gear (66) is fixed on the inner shaft (12). The elastic inner support structure (8) is also provided with a locking structure (9). The inner shaft (12) rotates to drive the locking structure (9) to lock the elastic inner support structure (8), so that the elastic inner support structure (8) no longer has elasticity and maintains the position of the short section (73) in a rigid support posture.

3. The high-voltage switch housing welding fixture according to claim 2, characterized in that, The pull-back gear 1 (63) has teeth on both sides and no teeth in the rest of the position; The pull-back gear 2 (66) has teeth on both sides, and no teeth in the other positions.

4. The high-voltage switch housing welding fixture according to claim 2, characterized in that, The elastic inner support structure (8) includes a main column (84), which is fixed on the Y-axis movable vertical plate (33). The outer surface of the main column (84) is provided with an outer cylinder (82) in a radial pattern. An inner support column (81) is inserted into the outer cylinder (82), and a spring (83) is sleeved on the part of the inner support column (81) located inside the outer cylinder (82).

5. The high-voltage switch housing welding fixture according to claim 4, characterized in that, The locking structure (9) includes: Carrier plate (98), the carrier plate (98) is located inside the main column (84), and rack plate two (96) is fixed on the side of the carrier plate (98) near the pull gear two (66), and rack plate two (96) is located outside the main column (84), and rack plate two (96) is adapted to pull gear two (66); A conical head (91) is mounted on the side of the carrier plate (98) away from the rack plate (96) via a two-degree-of-freedom bracket (95); An electromagnet (93) is fixed on the side of the conical head (91) away from the carrier plate (98). The main column (84) is provided with a disk (94) adapted to the electromagnet (93), and the area of ​​the disk (94) is larger than that of the electromagnet (93).

6. The high-voltage switch housing welding fixture according to claim 5, characterized in that, A second spring (92) is installed on the side of the conical head (91) away from the carrier plate (98), and the end of the second spring (92) near the disk (94) is fixed inside the main column (84).

7. The high-voltage switch housing welding fixture according to claim 6, characterized in that, The dual-degree-of-freedom support (95) includes a Z-axis slide bar (951), which is fixed on the carrier plate (98). A Z-axis slider (952) is slidably disposed on the Z-axis slide bar (951), and an X-axis slide bar (953) is mounted on the Z-axis slider (952). A conical head (91) is slidably disposed on the X-axis slide bar (953).

8. The high-voltage switch housing welding fixture according to claim 1, characterized in that, Both the X-axis movable vertical plate (32) and the Y-axis movable vertical plate (33) have a ground rail (1), and both the X-axis movable vertical plate (32) and the Y-axis movable vertical plate (33) can actively slide on the ground rail (1).

9. The high-voltage switch housing welding fixture according to claim 1, characterized in that, Both the X-axis movable plate (32) and the fixed plate (31) are provided with positioning plates (10), and the positioning plates (10) are equipped with pre-clamping structures (4). The pre-clamping structures (4) are used to fix the long section (71) on the positioning plates (10).

10. A welding fixture for a high-voltage switch housing according to claim 2, characterized in that, The driving structure (5) includes: The second bidirectional bevel gear (54) is fixed to one end of the outer shaft (11) near the fixed plate (31); The first bidirectional bevel gear (53) is fixed at one end of the inner shaft (12) near the fixed vertical plate (31); An active bevel gear (55) meshes with a first bidirectional bevel gear (53) or a second bidirectional bevel gear (54). The active bevel gear (55) is mounted on a bearing housing (56), and the bearing housing (56) is provided with a motor (52) capable of driving the active bevel gear (55) to rotate. Cylinder (51), which is used to push and pull motor (52).

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