A modular power distribution switch that can be assembled underground

Abstract

This invention discloses a modular power distribution switch that can be assembled in underground mines, belonging to the field of underground power distribution switch technology. It includes a base, an extension base, a movable connecting frame, a fixed connecting frame, support rods, and a telescopic structure. The extension base is slidably connected to the inner side of the base along its height direction. When the extension base extends from the top of the base, it expands the space inside the base. Mounting slots are equidistantly spaced from top to bottom on the inner wall of the rear side of the base. The movable connecting frame is connected to the mounting slots via the telescopic structure. When the extension base is raised, the movable connecting frame extends from the mounting slots under the action of the telescopic structure. Two sets of support rods are installed on both sides of the base. When the extension base is raised, the two sets of support rods are opened by a spreading assembly and become flush with the bottom of the base. This invention allows for free combination of the number and specifications of the power distribution switch body according to the layout of electrical equipment in different underground areas and actual power demand, meeting the diverse power requirements of complex underground environments.

Description

Technical Field

[0001] This invention belongs to the field of underground power distribution switch technology, specifically an underground modular power distribution switch that can be assembled. Background Technology

[0002] In modern mining operations, numerous electrical devices such as ventilation fans, hoists, and coal mining machines need to be operated underground. The huge power demand means that workers often need to use multiple power distribution switches for power distribution and control. However, most traditional underground power distribution switches adopt a fixed structure design, which cannot be flexibly selected and adjusted according to the actual layout of electrical equipment and power demand.

[0003] This leads to workers having to connect a single power distribution switch to multiple electrical devices during actual use. On the one hand, overloading the power supply can easily cause the power distribution switch to overheat, short circuit, or other faults, increasing the risk of fires and other safety accidents. On the other hand, due to the centralized connection of electrical devices, the difficulty of troubleshooting and repairing a fault increases significantly, which not only delays production but may also cause secondary safety problems due to improper operation during emergency repairs. Summary of the Invention

[0004] This invention overcomes the shortcomings of existing technologies and proposes a modular power distribution switch that can be assembled underground. This invention is achieved through the following technical solution:

[0005] A modular power distribution switch that can be assembled in an underground well includes a base, an extension seat, a movable connecting frame, a fixed connecting frame, a support rod, and a telescopic structure. The base is a box structure with an open top, and the extension seat is a box structure with an open bottom. The front side of the extension seat is adjacent to the front side of the base, and both the front side of the base and the front side of the extension seat are openable. The extension seat is slidably connected to the inside of the base along the height direction. When the extension seat extends from the top of the base, it expands the space inside the base.

[0006] Mounting slots are provided at equal intervals from top to bottom on the inner wall of the rear side of the base. A movable connecting frame is connected to the mounting slot through a telescopic structure. A fixed connecting frame is fixedly installed at equal intervals from top to bottom on the inner wall of the rear side of the extension base. Both the movable connecting frame and the fixed connecting frame are used to install multiple power distribution switch bodies. When the extension base is raised, the movable connecting frame extends out of the mounting slot under the action of the telescopic structure, and then the power distribution switch body is installed on the movable connecting frame.

[0007] Two sets of support rods are installed on each side of the base, and a spreading component is installed on each side of the base. The spreading component is installed in conjunction with the corresponding support rod. When the extension seat is raised, the spreading component makes the two sets of support rods gradually spread outward in a figure-eight shape until the two sets of support rods are in a straight line and flush with the bottom of the base.

[0008] Furthermore, the movable connecting frame includes a wide plate, a narrow plate, and a middle plate, with the middle plate connecting the wide plate and the narrow plate, and the wide plate and the narrow plate being parallel.

[0009] Furthermore, the telescopic structure includes an L-shaped top rod, a rotating shaft, an L-shaped insert rod, and a slot; first springs are symmetrically fixedly connected to the inner wall of the mounting slot, one end of each of the two first springs is fixedly connected to the narrow plate of the movable connecting frame, an L-shaped top rod is fixedly connected to the top of the narrow plate, a rotating shaft is rotatably connected inside the base, a first gear is fixedly connected to one end of the rotating shaft, a first threaded rod is fixedly connected to the other end of the rotating shaft, a first threaded slider is threaded to one end of the first threaded rod, an L-shaped insert rod is fixedly connected to the bottom end of the first threaded slider, and a slot is provided at the end of the narrow plate near the first threaded slider; the L-shaped insert rod cooperates with the slot for insertion and fixation.

[0010] Furthermore, a second threaded rod is rotatably connected to the inner wall of the base, and the extension seat is threadedly connected to the second threaded rod. The back of the extension seat abuts against the L-shaped top rod, and a small rack is fixedly connected to the back of the extension seat. The small rack is intermittently meshed with the first gear.

[0011] Furthermore, the wide plate is a closed hollow structure; a push plate is slidably and sealingly connected to the inner wall of the wide plate, and a protrusion is connected to the side wall of the push plate. The protrusion extends out of the wide plate and is fixedly connected to an extrusion plate, and the protrusion is slidably and sealingly connected to the wide plate; both the push plate and the extrusion plate are parallel to the wide plate; the upper end of the extrusion plate extends through the outer side of the top of the middle plate, and the extrusion plate is slidably connected to the middle plate; threaded holes are equidistantly opened at the top end of the extrusion plate; a fourth spring is fixedly connected between the push plate and the inner wall of the wide plate; hydraulic oil is injected between the inside of the wide plate and the push plate;

[0012] An extension block is slidably and sealed to one end of the wide plate. One end of the extension block extends into the hollow part of the wide plate. The extension block has a cavity inside. There is a circular hollow structure on the inner wall of the extension block. A retractable annular airbag is fixedly connected to the circular hollow structure. A telescopic rod is fixedly connected to the inner wall of the cavity. The telescopic end of the telescopic rod passes through the annular airbag and is fixedly connected to the inner wall of the annular airbag. A rubber block is fixedly connected to the end of the telescopic rod that extends out of the annular airbag. The extension block is equipped with a flow component, through which hydraulic oil enters the cavity.

[0013] Furthermore, the end near the hollow part of the wide plate is a block structure, with two flow components in opposite directions installed on the upper and lower sides of the block structure respectively.

[0014] Furthermore, the flow assembly includes a flow hole, a receiving hole, a piston, and a cross hole; the side of the block structure closest to the cavity is the inner wall, and the side of the block structure furthest from the cavity is the outer wall. The flow hole of the upper flow assembly is opened on the inner wall of the block structure, and the cross hole of the upper flow assembly is opened on the outer wall of the block structure; the flow hole of the lower flow assembly is opened on the outer wall of the block structure, and the cross hole of the lower flow assembly is opened on the inner wall of the block structure; the flow hole and the cross hole of the same flow assembly are connected through the receiving hole; a second spring is fixedly connected to the inner wall of the receiving hole, and a piston is slidably connected to the inner wall of the receiving hole. One end of the piston is fixedly connected to the second spring, and the other end of the piston contacts the inner wall of the corresponding flow hole; the inner diameter of the flow hole is smaller than the inner diameter of the receiving hole, the outer diameter of the piston is smaller than the inner diameters of the receiving hole and the cross hole, and the outer diameter of the piston is larger than the inner diameter of the flow hole.

[0015] Furthermore, the expansion assembly includes a large gear, a connecting rod symmetrically rotatably connected to the inner wall of the base, a washer rotatably connected to one end of the connecting rod, and a large gear slidably connected to one end of the connecting rod; large racks are symmetrically fixedly connected to both sides of the extension seat; the large gear and the large rack mesh with each other; a third spring is sleeved on one end of the connecting rod, and the two sides of the third spring are fixedly connected to one side of the large gear and the washer, respectively; a driving bevel gear is rotatably connected to one end of the connecting rod, and the large gear and the driving bevel gear are rubbed together on their respective sides; a third threaded rod is symmetrically rotatably connected to the inner sides of both sides of the base, a driven bevel gear is fixedly connected to the top of the third threaded rod, and the driving bevel gear and the driven bevel gear mesh with each other; a third threaded slider is threadedly connected to one end of the third threaded rod, and the two ends of the third threaded slider are hinged to one end of the support rod.

[0016] Furthermore, a groove is provided in the middle of the support rod, and fixed columns are fixedly connected to both sides of the base, with the groove and the fixed columns being slidably connected.

[0017] Furthermore, a main door is symmetrically and rotatably connected to one side of the base, and a secondary door is slidably connected inside the main door. The top of the secondary door is rotatably connected to one side of the extension seat, and the axis of the connection between the main door and the base coincides with the axis of the connection between the secondary door and the extension seat.

[0018] The base has assembly slots and assembly strips on both sides, and the sizes of the assembly slots and assembly strips are compatible.

[0019] The beneficial effects of this invention compared to the prior art are as follows:

[0020] 1. Flexible and modular design, adaptable to complex power usage scenarios: By setting up a sliding extension seat, a movable connecting frame, and a fixed connecting frame, rotating the second threaded rod raises the extension seat, which removes the restriction on the movable connecting frame, making it easy to assemble multiple power distribution switch bodies via the movable connecting frame; This flexible assembly method allows for free combination of the number and specifications of power distribution switch bodies according to the layout of electrical equipment in different underground areas and actual power usage needs, changing the limitations of traditional power distribution switch structures that are fixed and cannot be selected as needed, effectively solving the problem of one power distribution switch connecting multiple electrical devices, and meeting the diverse power usage requirements of complex underground environments.

[0021] 2. Enhanced stability and safe operation of equipment: When the extension seat rises, a series of transmission structures, including a large rack, a large gear, a driving bevel gear, and a driven bevel gear, drive the support rod to gradually expand outward in a figure-eight shape until it becomes a straight line, increasing the contact area between the base and the ground. Even in complex geological conditions and frequent mechanical vibrations underground, it can effectively prevent the power distribution switch body from shaking or shifting. Compared with traditional power distribution switches, the stability is significantly improved, providing a solid guarantee for the stable operation of underground electrical equipment.

[0022] 3. Multiple safety protections reduce accident risks: When assembling the power distribution switch body, after the movable connecting frame is stable, the mounting bolts on the power distribution switch body are fixed through the threaded holes. The compression plate compresses the hydraulic oil to push the extension block to move. At the same time, the hydraulic oil compresses the annular airbag to release pressure, and the rubber block will squeeze the second threaded rod, preventing workers from accidentally rotating the second threaded rod before disassembling the power distribution switch, thus avoiding damage caused by the extension seat squeezing the movable connecting frame or the power distribution switch body. In addition, the L-shaped plug and slot insertion design further ensures the stability of the movable connecting frame, preventing shaking during subsequent installation or use and causing safety accidents, greatly reducing safety hazards in the underground power distribution process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall, unexpanded external structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the external structure of the invention after overall expansion;

[0025] Figure 3 This is a schematic diagram of the internal structure of the base and extension seat of the present invention being connected together;

[0026] Figure 4 This is a schematic diagram of the internal structure of the base of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the movable connecting frame inside the base of the present invention after it has been extended.

[0028] Figure 6This is a schematic diagram of the structure of the back of the extension base of the present invention;

[0029] Figure 7 This is a partial cross-sectional view of one side of the base of the present invention;

[0030] Figure 8 for Figure 7 Enlarged view of point A in the middle;

[0031] Figure 9 This is an anatomical diagram of the active bevel gear and the large gear of the present invention;

[0032] Figure 10 This is an anatomical diagram of the connecting rod and gasket of the present invention;

[0033] Figure 11 This is a schematic diagram of a partial cross-sectional view of the top of the base;

[0034] Figure 12 This is a schematic diagram of the overall structure of the mobile connecting frame of the present invention;

[0035] Figure 13 This is a partial cross-sectional view of one side of the movable connecting frame of the present invention;

[0036] Figure 14 This is a partial cross-sectional view of the other side of the movable connecting frame of the present invention;

[0037] Figure 15 This is a partial cross-sectional view of one side of the extension block of the present invention;

[0038] Figure 16 This is a schematic diagram of the extension block structure of the present invention.

[0039] In the diagram: 1. Base; 2. Extension seat; 3. Movable connecting frame; 4. Fixed connecting frame; 5. Support rod; 6. Mounting slot; 7. First spring; 8. L-shaped top rod; 9. Rotating shaft; 10. First gear; 11. First threaded rod; 12. First threaded slider; 13. L-shaped insertion rod; 14. Slot; 15. Power distribution switch body; 16. Wide plate; 17. Narrow plate; 18. Middle plate; 21. Push plate; 22. Extrusion plate; 23. Threaded hole; 24. Fourth spring; 31. Extension block; 32. Cavity; 33. Annular airbag; 34. Telescopic rod; 36. Rubber block; 41. Flow hole; 42. Receiving hole; 43. Second spring; 44. Piston; 45. Cross hole; 51. Second threaded rod; 52. Small rack; 53. Large rack; 61. Connecting rod; 62. Washer; 63. Large gear; 64. Third spring; 65. Driving bevel gear; 66. Third threaded rod; 67. Driven bevel gear; 68. Third threaded slider; 69. Slide groove; 610. Fixed column; 81. Main door; 82. Secondary door. Detailed Implementation

[0040] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0041] See Figures 1 to 16 This embodiment proposes a modular power distribution switch that can be assembled in an underground well, including a base 1, an extension seat 2, a movable connecting frame 3, a fixed connecting frame 4, a support rod 5, and a telescopic structure; the base 1 is a box structure with an open top, and the extension seat 2 is a box structure with an open bottom. The front side of the extension seat 2 is adjacent to the front side of the base 1, and both the front side of the base 1 and the front side of the extension seat 2 are openable structures; the extension seat 2 is slidably connected to the inside of the base 1 along the height direction, and when the extension seat 2 extends from the top of the base 1, the space inside the base 1 can be expanded.

[0042] Mounting slots 6 are provided at equal intervals from top to bottom on the inner wall of the rear side of the base 1. A movable connecting frame 3 is connected to the mounting slot 6 through a telescopic structure. A fixed connecting frame 4 is fixedly installed at equal intervals from top to bottom on the inner wall of the rear side of the extension seat 2. Both the movable connecting frame 3 and the fixed connecting frame 4 are used to install multiple power distribution switch bodies 15. When the extension seat 2 is raised, the movable connecting frame 3 extends out from the mounting slot 6 under the action of the telescopic structure, and the power distribution switch body 15 can be installed on the movable connecting frame 3.

[0043] Two sets of support rods 5 are installed on each side of the base 1, and opening components are installed on each side of the base 1. The opening components are installed in conjunction with the corresponding support rods 5. When the extension seat 2 is raised, the center of gravity of the entire combined power distribution switch moves upward. The opening components make the two sets of support rods 5 gradually open outward in a figure-eight shape until the two sets of support rods 5 are in a straight line and flush with the bottom of the base 1. This increases the contact area between the bottom of the base 1 and the ground, thereby making the entire combined power distribution switch more stable.

[0044] Specifically, the movable connecting frame 3 includes a wide plate 16, a narrow plate 17 and a middle plate 18. The middle plate 18 is connected between the wide plate 16 and the narrow plate 17. The wide plate 16 and the narrow plate 17 are parallel. Through the wide plate 16, the narrow plate 17 and the middle plate 18, the movable connecting frame 3 forms an I-shaped structure as a whole. The wide plate 16 is a closed hollow structure.

[0045] The telescopic structure includes an L-shaped top rod 8, a rotating shaft 9, an L-shaped insert rod 13, and a slot 14. First springs 7 are symmetrically fixed to the inner wall of the mounting groove 6. One end of each of the two first springs 7 is fixedly connected to a narrow plate 17 of the same movable connecting frame 3. An L-shaped top rod 8 is fixedly connected to the top of the narrow plate 17. A rotating shaft 9 is rotatably connected inside the base 1. A first gear 10 is fixedly connected to one end of the rotating shaft 9, located at the top of the L-shaped top rod 8. A first threaded rod 11 is fixedly connected to the other end of the rotating shaft 9. A first threaded slider 12 is threaded to one end of the first threaded rod 11. An L-shaped insert rod 13 is fixedly connected to the bottom end of the first threaded slider 12. A slot 14 is provided at the end of the narrow plate 17 near the first threaded slider 12. The L-shaped insert rod 13 and the slot 14 cooperate for insertion and fixation.

[0046] A push plate 21 is slidably and sealingly connected to the inner wall of the wide plate 16 of the movable connecting frame 3. A protrusion is connected to the side wall of the push plate 21. The protrusion extends out of the wide plate 16 and is fixedly connected to an extrusion plate 22. The protrusion and the wide plate 16 are slidably and sealingly connected. The push plate 21 and the extrusion plate 22 are both parallel to the wide plate 16. The upper end of the extrusion plate 22 passes through the outer side of the top of the middle plate 18 and is slidably connected to the middle plate 18. Threaded holes 23 are equidistantly opened at the top of the extrusion plate 22. A fourth spring 24 is fixedly connected between the push plate 21 and the inner wall of the wide plate 16. Hydraulic oil is injected between the inside of the wide plate 16 and the push plate 21.

[0047] One end of the wide plate 16 is slidably sealed to an extension block 31. The inner end of the extension block 31 extends into the hollow part of the wide plate 16. The extension block 31 has a cavity 32 inside. The inner wall of the extension block 31 has a circular hollow structure. A telescopic annular airbag 33 is fixedly connected to the circular hollow structure. A telescopic rod 34 is fixedly connected to the inner wall of the cavity 32. The telescopic end of the telescopic rod 34 passes through the circular hole in the middle of the annular airbag 33 and is fixedly connected to the inner wall of the annular airbag 33. A rubber block 36 is fixedly connected to the end of the telescopic rod 34 that extends out of the annular airbag 33. The end of the extension block 31 near the hollow part of the wide plate 16 is a block structure. Two flow components in opposite directions are respectively installed on the upper and lower sides of the block structure.

[0048] The flow assembly includes a flow hole 41, a receiving hole 42, a piston 44, and a cross hole 45. The side of the block structure closest to the cavity 32 is the inner wall, and the side of the block structure away from the cavity 32 is the outer wall. The flow hole 41 of the upper flow assembly is formed on the inner wall of the block structure, and the cross hole 45 of the upper flow assembly is formed on the outer wall of the block structure; the flow hole 41 of the lower flow assembly is formed on the outer wall of the block structure, and the cross hole 45 of the lower flow assembly is formed on the inner wall of the block structure. Above; the flow hole 41 and the cross hole 45 of the same flow component are connected by a receiving hole 42; a second spring 43 is fixedly connected to the inner wall of the receiving hole 42, and a piston 44 is slidably connected to the inner wall of the receiving hole 42. One end of the piston 44 is fixedly connected to the second spring 43, and the other end of the piston 44 contacts the inner wall of the corresponding flow hole 41; wherein, the inner diameter of the flow hole 41 is smaller than the inner diameter of the receiving hole 42, the outer diameter of the piston 44 is smaller than the inner diameter of the receiving hole 42 and the cross hole 45, and the outer diameter of the piston 44 is larger than the inner diameter of the flow hole 41.

[0049] A second threaded rod 51 is rotatably connected to the inner wall of the base 1. The second threaded rod 51 is close to one end of the rubber block 36. When the rubber block 36 extends under the action of the telescopic rod 34, the rubber block 36 squeezes the second threaded rod 51, thereby braking the second threaded rod 51. The extension seat 2 is threadedly connected to the second threaded rod 51. The back of the extension seat 2 abuts against the L-shaped top rod 8. A small rack 52 is fixedly connected to the back of the extension seat 2. The small rack 52 is intermittently meshed with the first gear 10. Large racks 53 are symmetrically fixedly connected to both sides of the extension seat 2.

[0050] The expansion assembly includes a large gear 63. A connecting rod 61 is symmetrically rotatably connected to the inner wall of the base 1. One end of the connecting rod 61 is rotatably connected to a washer 62, and the large gear 63 is slidably connected to the other end of the connecting rod 61. The large gear 63 meshes with a large rack 53. A third spring 64 is sleeved on one end of the connecting rod 61. The two sides of the third spring 64 are fixedly connected to one side of the large gear 63 and the washer 62, respectively. A driving bevel gear 65 is rotatably connected to one end of the connecting rod 61. The large gear 63 and the driving bevel gear 65 are close to each other. The base 1 is symmetrically connected to the friction connection on one side, and the two sides of the base 1 are symmetrically connected to the third threaded rod 66. The top of the third threaded rod 66 is fixedly connected to the driven bevel gear 67. The driving bevel gear 65 is meshed with the driven bevel gear 67. One end of the third threaded rod 66 is threadedly connected to the third threaded slider 68. The two ends of the third threaded slider 68 are hinged to one end of the support rod 5. The middle of the support rod 5 is provided with a sliding groove 69. The two sides of the base 1 are fixedly connected to the fixed column 610. The sliding groove 69 is slidably connected to the fixed column 610.

[0051] A main door 81 is symmetrically and rotatably connected to one side of the base 1. A secondary door 82 is slidably connected inside the main door 81. The top of the secondary door 82 is rotatably connected to one side of the extension seat 2. The connection between the main door 81 and the base 1 coincides with the connection between the secondary door 82 and the extension seat 2.

[0052] It should be noted that the main door 81 and the secondary door 82 mentioned above are quick-release doors. All of the above structures meet the explosion-proof requirements and can still maintain sufficient strength and explosion-proof gaps after extension and retraction. The electrical clearances and creepage distances of the equipment still meet the standards, and the circuit energy of the safety equipment is always limited to the safe range.

[0053] The base 1 has assembly slots and assembly strips on both sides. The sizes of the assembly slots and assembly strips are compatible. If there are multiple power distribution switchgear in the construction area, the assembly slot on one side of one base 1 can be assembled with the assembly strip on the other side of another base 1 to enhance the stability of multiple power distribution switchgear.

[0054] The working principle of the modular power distribution switch that can be assembled in an underground mine, as described in this embodiment, is as follows:

[0055] When miners need to use multiple power distribution switch bodies 15 (the ambient gas concentration must be below 1%, and the upstream power supply must be cut off first), they first need to rotate the second threaded rod 51. The rotation of the second threaded rod 51 causes the extension seat 2 to rise. The rise of the extension seat 2 will affect the following components: the large gear 63, the first gear 10, and the L-shaped top rod 8.

[0056] The rise of the extension seat 2 drives the large gear 63 to rotate via the large racks 53 on both sides. The rotation of the large gear 63 drives the driving bevel gear 65 to rotate through friction. The third spring 64 is in a compressed state, and the friction between the large gear 63 and the driving bevel gear 65 comes from the third spring 64. The driving bevel gear 65 drives the driven bevel gear 67 to rotate, which in turn causes the third threaded slider 68 to descend. The descent of the third threaded slider 68 causes one end of the two support rods 5 to descend together. Since the support rods 5 have a groove 69 in the middle and are restricted by the fixed column 610, the two sets of support rods 5 gradually extend outward in a V-shape until the two support rods 5 are in a straight line. If the extension seat 2 rises to a certain position, the large rack 53 still drives the large gear 63 to rotate, but when the third threaded slider 68 descends to the lowest point, the large gear 63 compresses the third spring 64 and cannot drive the driving gear 65 to rotate. The extension of the extension seat 2 not only increases the space between the base 1 and the extension seat 2, but also allows for the combination of more power distribution switch bodies 15 for miners to use. When the extension seat 2 is extended, the two sets of support rods 5 are spread out and form a straight line. At this time, the contact area between the bottom of the base 1 and the ground increases, making the entire power distribution switch more stable.

[0057] The rise of the extension seat 2 first causes the L-shaped top rod 8 to disengage from the limitation of the extension seat 2. Therefore, the movable connecting frame 3 moves under the elastic force of the first spring 7, thereby moving the movable connecting frame 3 out of the mounting slot 6, which facilitates the subsequent assembly of the power distribution switch body 15. In order to ensure the stability of the movable connecting frame 3, the extension seat 2 continues to move. The movement of the extension seat 2 begins to drive the first gear 10 to rotate through the engagement of the pinion 52 (before this, the pinion 52 is not engaged with the first gear 10). The rotation of the first gear 10 drives the rotating shaft 9 to rotate, which in turn causes the first threaded rod 11 to rotate. The first threaded rod 11 drives the first threaded slider 12 and the L-shaped plug 13 to move towards one end of the movable connecting frame 3 until the L-shaped plug 13 is inserted into the slot 14. At this time, the movable connecting frame 3 is limited by the L-shaped plug 13, thereby ensuring the stability of the movable connecting frame 3 and preventing shaking during the subsequent installation or use of the power distribution switch body 15.

[0058] Once the movable connecting frame 3 is stable, the power switch body 15 can be assembled. The mounting bolts on the power switch body 15 are fixed in the threaded hole 23. Since the threaded hole 23 is opened on the extrusion plate 22, and the extrusion plate 22 and the protrusion can only move along the thickness direction of the movable connecting frame 3, as the mounting bolts are tightened, the extrusion plate 22 drives the push plate 21. The push plate 21 compresses the hydraulic oil and compresses the fourth spring 24. Since the liquid is incompressible, the hydraulic oil pushes the extension block 31 to move. The extension block 31 moves to the end of the movable connecting frame 3. As the pressure of the hydraulic oil continues to increase, when the movable connecting frame 3 can no longer move, the hydraulic oil pushes the piston 44 of the bottom flow component, causing it to squeeze the second spring 43. At this time, the hydraulic oil enters the cavity 32 through the receiving hole 42 and the cross hole 45 of the bottom flow component. Furthermore, an annular airbag 33 is installed in the cavity 32. The annular airbag 33 is compressed by hydraulic oil. At the same time, the telescopic end of the telescopic rod 34 is stretched by the annular airbag 33. After the extension block 31 is displaced, the rubber block 36 at one end of the telescopic rod 34 is directly facing the second threaded rod 51 inside the base 1. As the telescopic rod 34 extends, the rubber block 36 compresses the second threaded rod 51. When the power distribution switch body 15 on the movable connecting frame 3 has not been removed, the rubber block 36 will always compress the second threaded rod 51. This can prevent the worker from rotating the second threaded rod 51 without removing the power distribution switch body 15, which could cause the extension seat 2 to compress the movable connecting frame 3 or damage the power distribution switch body 15. That is, the rubber block 36 has the function of preventing disassembly of the power distribution switch body 15 on the movable connecting frame 3.

[0059] If there are multiple modular power distribution switches that can be assembled in the construction area, the assembly slot on one side of one base 1 can be assembled with the assembly strip on one side of another base 1 to enhance stability.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular combined distribution switchboard, which is assembled downhole, characterized in that, Including base (1), extension seat (2), moving connecting frame (3), fixed connecting frame (4), brace (5) and telescopic structure;The base (1) is the box structure of top open, the extension seat (2) is the box structure of bottom open, the front side of extension seat (2) is adjacent with the front side of base (1), and the front side of base (1) and the front side of extension seat (2) are all openable structure;Extension seat (2) is slidably connected in the inside of base (1) along the height direction, when extension seat (2) is stretched out from the top of base (1), the space in base (1) is expanded; The installation groove (6) is opened in the rear side inner wall of base (1) from top to bottom equidistantly, the moving connecting frame (3) is connected in the installation groove (6) by telescopic structure;The moving connecting frame (3) includes wide plate (16), narrow plate (17) and intermediate plate (18), the intermediate plate (18) is connected between wide plate (16) and narrow plate (17), and the wide plate (16) is parallel with the narrow plate (17);Telescopic structure includes L type top rod (8), pivot (9), L type plug rod (13) and plug groove (14);The first spring (7) is fixedly connected on the inner wall of installation groove (6) symmetrically, one end of two first springs (7) is fixedly connected with the narrow plate (17) of moving connecting frame (3), the top end of narrow plate (17) is fixedly connected with L type top rod (8), the pivot (9) is rotatably connected in the inside of base (1), one end of pivot (9) is fixedly connected with first gear (10), the other end of pivot (9) is fixedly connected with first threaded rod (11), one end of first threaded rod (11) is threadedly connected with first threaded sliding block (12), the bottom end of first threaded sliding block (12) is fixedly connected with L type plug rod (13), one end of narrow plate (17) close to first threaded sliding block (12) is provided with plug groove (14);L type plug rod (13) is matched with plug groove (14) for plug fixing; The fixed connecting frame (4) is fixedly installed on the rear side inner wall of extension seat (2) from top to bottom equidistantly;The moving connecting frame (3) and the fixed connecting frame (4) are all used for installing multiple power distribution switch bodies (15);When extension seat (2) is raised, the moving connecting frame (3) is stretched out from installation groove (6) under the action of telescopic structure, and then the power distribution switch body (15) is installed on moving connecting frame (3); Two groups of brace (5) are installed on the both sides of base (1) respectively, the base (1) is provided with brace opening assembly on both sides, and the brace opening assembly is installed in cooperation with the corresponding brace (5);When extension seat (2) is raised, the two groups of brace (5) are gradually opened outwards in the shape of eight characters through the brace opening assembly, until the two groups of brace (5) are in the shape of one character and are flush with the bottom of base (1).

2. A modular combined distribution switch for downhole use according to claim 1, characterised in that The second threaded rod (51) is rotatably connected on the inner wall of base (1), the extension seat (2) is threadedly connected with the second threaded rod (51), the back of extension seat (2) is abutted with L type top rod (8), the back of extension seat (2) is fixedly connected with small rack (52), and the small rack (52) is intermittently engaged with first gear (10).

3. A modular combined distribution switch for downhole use according to claim 2, characterised in that, The wide plate (16) is a closed hollow structure; a push plate (21) is in sliding seal connection with the inner wall of the wide plate (16), the side wall of the push plate (21) is connected with a protruding block, the protruding block extends out of the wide plate (16) and is fixedly connected with an extrusion plate (22), the protruding block is in sliding seal connection with the wide plate (16); the push plate (21) and the extrusion plate (22) are parallel to the wide plate (16); the upper end of the extrusion plate (22) penetrates through the top outer side of the middle plate (18), and the extrusion plate (22) is in sliding connection with the middle plate (18); a threaded hole (23) is equidistantly formed in the top end of the extrusion plate (22); a fourth spring (24) is fixedly connected between the push plate (21) and the inner wall of the wide plate (16); hydraulic oil is injected between the inside of the wide plate (16) and the push plate (21); One end of the wide plate (16) is in sliding seal connection with an extension block (31), the inner side of one end of the extension block (31) extends into the hollow of the wide plate (16), a cavity (32) is formed in the inside of the extension block (31), the inner wall of the extension block (31) is circular hollow structure at one position, a retractable annular air bag (33) is fixedly connected at the circular hollow structure, a telescopic rod (34) is fixedly connected to the inner wall of the cavity (32), the telescopic end of the telescopic rod (34) penetrates through the annular air bag (33) and is fixedly connected to the inner wall of the annular air bag (33), the end of the telescopic rod (34) extending out of the annular air bag (33) is fixedly connected with a rubber block (36); the extension block (31) is provided with a flow assembly, and the hydraulic oil enters the cavity (32) through the flow assembly.

4. A modular combined distribution switch for downhole use according to claim 3, wherein, The end close to the hollow of the wide plate (16) is a block structure, and two opposite flow assemblies are respectively installed on the upper and lower sides of the block structure.

5. A modular combined distribution switch for downhole use according to claim 4, wherein, The flow assembly comprises a flow hole (41), a containing hole (42), a piston (44) and a cross hole (45); the side close to the cavity (32) of the block structure is an inner wall, and the side away from the cavity (32) of the block structure is an outer wall; the flow hole (41) of the flow assembly located on the upper side is formed on the inner wall of the block structure, and the cross hole (45) of the flow assembly located on the upper side is formed on the outer wall of the block structure; the flow hole (41) of the flow assembly located on the lower side is formed on the outer wall of the block structure, and the cross hole (45) of the flow assembly located on the lower side is formed on the inner wall of the block structure; the flow hole (41) and the cross hole (45) of the same flow assembly are in communication through the containing hole (42); the second spring (43) is fixedly connected to the inner wall of the containing hole (42), the piston (44) is in sliding connection with the inner wall of the containing hole (42), one end of the piston (44) is fixedly connected with the second spring (43), and the other end of the piston (44) is in contact with the inner wall of the corresponding flow hole (41); the inner diameter of the flow hole (41) is smaller than the inner diameter of the containing hole (42), the outer diameter of the piston (44) is smaller than the inner diameters of the containing hole (42) and the cross hole (45), and the outer diameter of the piston (44) is larger than the inner diameter of the flow hole (41).

6. A well down combinable combined distribution switch according to claim 1, characterized in that, The distraction assembly comprises a large gear (63), the inner wall of the base (1) is symmetrically connected with a connecting rod (61) in rotation, one end of the connecting rod (61) is rotatably connected with a gasket (62), and one end of the connecting rod (61) is slidably connected with the large gear (63); the two sides of the extension base (2) are symmetrically fixedly connected with large racks (53); the large gear (63) is meshedly connected with the large rack (53), one end of the connecting rod (61) is sleeved with a third spring (64), the two sides of the third spring (64) are fixedly connected with the large gear (63) and one side of the gasket (62) respectively, one end of the connecting rod (61) is rotatably connected with a driving bevel gear (65), the side, which is close to each other, of the large gear (63) and the driving bevel gear (65) is frictionally connected, the two sides of the base (1) are symmetrically rotatably connected with third threaded rods (66), the top end of the third threaded rod (66) is fixedly connected with a driven bevel gear (67), the driving bevel gear (65) is meshedly connected with the driven bevel gear (67), one end of the third threaded rod (66) is threadedly connected with a third threaded sliding block (68), and the two ends of the third threaded sliding block (68) are hingedly connected with one end of the supporting rod (5).

7. A modular combined distribution switch for downhole use according to claim 6, characterised in that, The middle part of the supporting rod (5) is provided with a sliding groove (69), and the two sides of the base (1) are fixedly connected with fixed columns (610); the sliding groove (69) is slidably connected with the fixed columns (610).

8. A modular combined distribution switch for downhole use according to claim 1, wherein, One side of the base (1) is symmetrically rotatably connected with a main door (81), the inside of the main door (81) is slidably connected with a secondary door (82), the top end of the secondary door (82) is rotatably connected with one side of the extension base (2), and the connecting positions of the main door (81) and the base (1) and the connecting positions of the secondary door (82) and the extension base (2) are coaxial; The two sides of the base (1) are respectively provided with an assembling groove and an assembling strip, and the assembling groove and the assembling strip are adapted in size.

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