Electrical control cabinet

Abstract

The invention belongs to the technical field of electric control cabinets, and discloses an electric control cabinet which comprises a cabinet body, a cabinet door is movably connected in the cabinet body, a connecting frame is fixed in the cabinet body, a mounting frame is arranged in the connecting frame, a supporting block is movably connected in the mounting frame, and a dismounting mechanism is mounted outside the supporting block. Through cooperation of structures such as first limiting rods, limiting bolts and the supporting blocks, the device can push the supporting blocks to move the positions of the supporting blocks among the three groups of first limiting rods after the mounting frame and the connecting frame are connected through the three groups of first limiting rods and the limiting bolts, and then the supporting blocks are driven to move to the positions among the three groups of first limiting rods; the supporting blocks are clamped among the three groups of first limiting rods and limiting bolts through the shapes of the supporting blocks, so that the first limiting rods are prevented from shaking, the strength of fixing the mounting frame by the first limiting rods and the limiting bolts is ensured, and the purpose of reinforcing and fixing the connecting part of the mounting frame by the device is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of electric control cabinets, in particular to an electric control cabinet. Background Art

[0002] A control cabinet usually refers to a metal cabinet used to install switchgear that controls the operation of electrical appliances. Control cabinets are divided into electrical control cabinets, frequency conversion control cabinets, low-voltage control cabinets, high-voltage control cabinets, water pump control cabinets, power control cabinets, explosion-proof control cabinets, elevator control cabinets, PLC control cabinets, fire control cabinets, brick machine control cabinets, etc. according to their functions. Existing electrical control cabinets generally use general finished distribution cabinets. Guide rails for fixing switchgear are installed on the supporting base plate of the product distribution cabinet, or the switchgear is directly installed on the supporting base plate. A plastic wire trough is installed above and below each row of switchgear for circuit wiring.

[0003] The patent publication number is CN113241615A, which discloses an electrical control cabinet, belonging to the field of electrical control technology, including a cabinet body, an assembly layout surface is arranged in the cabinet body, an auxiliary connection part is correspondingly arranged on the assembly layout surface, a path expansion part for controlling the reserved amount of the connecting line is symmetrically and movably connected to the auxiliary connection part, a force point transfer part is connected between the path expansion part and the auxiliary connection part, a positioning component and a limiting component are connected between the auxiliary connection part and the path expansion part, and a rigid expansion route is formed through the combined action of the auxiliary connection part, the path expansion part, the force point transfer part, the positioning component and the limiting component, and the reserved amount of the connecting line is accurately controlled, which effectively avoids the waste of the connecting line, greatly improves the neatness and aesthetics of the connection line arrangement in the control cabinet, and correspondingly improves the neatness of the inside of the control cabinet, and at the same time has the advantages of good stability, energy saving and environmental protection, and space saving.

[0004] The inner walls on both sides of the distribution cabinet usually have mounting brackets with holes. The mounting brackets in the prior art cannot ensure the strength between the connecting parts after the electrical component support plate is freely installed in the electrical cabinet. The strength of the connection cannot be guaranteed by connecting the rods only by bolts. The connection needs to be reinforced and the device needs to be quickly disassembled and assembled to improve the efficiency of assembly. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides an electrical control cabinet.

[0006] To achieve the above object, the present invention provides the following technical solution: an electrical control cabinet, comprising a cabinet body, a cabinet door movably connected to the interior of the cabinet body, a connecting frame fixed to the interior of the cabinet body, a mounting frame arranged inside the connecting frame, a supporting block movably connected to the interior of the mounting frame, a disassembly mechanism installed outside the supporting block, and a limiting mechanism installed inside the supporting block; The disassembly and assembly mechanism comprises a connecting seat, a second limiting rod and a first limiting plate, wherein the connecting seat is fixed to the outside of the supporting block, the second limiting rod is fixed to the outside of the connecting seat, the first limiting plate is fixed to the outside of the second limiting rod, and the second limiting plate is sleeved on the outside of the second limiting rod; The limiting mechanism includes a first limiting member, a second limiting member and a second return spring, the first limiting member is movably connected to the inside of the support block, the second limiting member is movably connected to the inside of the support block, a second return spring is fixed to the top of the first limiting member, a second limiting member is fixed to the top of the second return spring, a winding rod is rotatably connected to the inside of the support block, and a connecting line is sleeved on the outside of the winding rod.

[0007] Preferably, a limiting seat is fixed outside the mounting frame, a third limiting rod is movably connected inside the limiting seat, a first return spring is sleeved outside the third limiting rod, and a limiting block is fixed outside the third limiting rod.

[0008] Preferably, four groups of connecting seats are provided, and the connecting seats are symmetrically distributed about the central axis of the support block. The outer wall of the second limiting rod fits the inner wall of the second limiting plate. The second limiting rod and the second limiting plate are slidably connected, and the diameter of the second limiting plate is larger than the diameter of the first limiting plate.

[0009] Preferably, four groups of the limit seats are provided, and the limit seats are symmetrically distributed about the central axis of the mounting frame. The limit seats are provided with limit grooves near the connecting seat ends, and the diameter of the limit grooves is greater than the diameters of the second limit plate and the first limit plate.

[0010] Preferably, the third limit rod is provided with two groups symmetrically distributed about the central axis of the limit seat, the outer wall of the third limit rod fits the inner wall of the limit seat, the third limit rod and the limit seat are slidably connected, and the first return spring is used to squeeze the third limit rod and the limit block and keep them moving inward.

[0011] Preferably, a gear is fixed to the outside of the winding rod, a trigger member is movably connected to the outside of the support block, and a shift block is fixed to the top of the trigger member.

[0012] Preferably, the first limit member and the support block are slidably connected, the second limit member and the support block are slidably connected, the second return spring is used to squeeze the first limit member and the second limit member and keep them moving outward, the winding rod is provided with two groups, the winding rod is symmetrically distributed with respect to the support block, the second limit member is fixed to the top end of the connecting line, and the first limit member is fixed to the bottom end of the connecting line.

[0013] Preferably, the outer wall of the trigger member is provided with a plurality of groups of teeth, the trigger member is meshingly connected with a gear, the outer wall of the trigger member fits the inner wall of the support block, and the trigger member is slidably connected with the support block.

[0014] Preferably, a first limit rod is provided inside the mounting frame, the external thread of the first limit rod is connected to a limit bolt, a limit plate is fixed to the outside of the support block, a heat dissipation cable groove is opened at the top of the mounting frame, and an electrical control element is fixed to the outside of the mounting frame.

[0015] Preferably, the outer wall of the connecting frame is provided with limiting holes, and the limiting holes are arranged in several groups and are distributed at equal intervals. The first limiting rods are arranged in three groups, and the limiting bolts are arranged in two groups and are symmetrically distributed about the central axis of the first limiting rods. The support blocks are arranged in two groups and are symmetrically distributed about the central axis of the mounting frame. The support block and the mounting frame are slidably connected, and the limiting plates are arranged in two groups and are symmetrically distributed about the central axis of the support block. The electrical control elements are arranged in several groups.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention cooperates with structures such as the first limit rod, the limit bolt, and the support block, so that the device can use three groups of first limit rods and limit bolts to connect the mounting frame to the connecting frame, and then push the support block to move the position of the support block between the three groups of first limit rods, so that the support block is stuck between the three groups of first limit rods and the limit bolts through its own shape, thereby avoiding the first limit rod from shaking and ensuring the strength of the first limit rod and the limit bolt to fix the mounting frame, thereby achieving the purpose of facilitating the device to strengthen the fixation of the mounting frame connection.

[0017] The present invention arranges the cooperation of structures such as a connecting seat, a second limiting rod, and a first limiting plate, so that the device can drive the first limiting plate to move when pushing the supporting block, so that after the first limiting plate squeezes the limiting block, the limiting block contracts inwardly, and after the first limiting plate passes, the first reset spring resets the limiting block, so that the limiting block is stuck at the bottom end of the first limiting plate, and then the first limiting plate is limited, so that the supporting block and the mounting frame are connected, thereby ensuring that the position of the supporting block will not be separated, and further ensuring the purpose of strengthening fixation.

[0018] The present invention cooperates with structures such as the first limit piece, the second limit piece, and the second return spring so that when the device is inserted into the support block, the trigger piece is pressed to move downward to drive the gear to rotate, and the rotation of the gear drives the winding rod to rotate so that the winding rod reels the connecting line, thereby contracting the first limit piece and the second limit piece. After the insertion of the support block is completed, the user can release the hand, and the second return spring pushes the first limit piece and the second limit piece to expand, so that the first limit piece and the second limit piece are located at one end of the three groups of first limit rods, and the support block is limited by the first limit rod, thereby achieving the purpose of facilitating the device to improve the firmness of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall internal structure of the present invention; Figure 3 It is a right side structural schematic diagram of the mounting frame of the present invention; Figure 4 It is a schematic diagram of a partial cross-sectional structure of the mounting frame of the present invention; Figure 5 It is a schematic diagram of the disassembly and assembly mechanism structure of the present invention; Figure 6 It is a schematic diagram of the structure of the limiting mechanism of the present invention; Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure of the local section at point A in the middle; Figure 8 It is a partial structural schematic diagram of the limiting mechanism of the present invention.

[0020] In the figure: 1. cabinet body; 2. cabinet door; 3. connecting frame; 4. mounting frame; 5. first limiting rod; 6. limiting bolt; 7. supporting block; 8. disassembly and assembly mechanism; 801. connecting seat; 802. second limiting rod; 803. first limiting plate; 804. second limiting plate; 805. limiting seat; 806. third limiting rod; 807. first return spring; 808. limiting block; 9. limiting mechanism; 901. first limiting member; 902. second limiting member; 903. second return spring; 904. winding rod; 905. connecting wire; 906. gear; 907. trigger member; 908. shifting block; 10. limiting plate; 11. heat dissipation cable trough; 12. electrical control element. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figures 1 to 8 As shown, the present invention provides an electrical control cabinet, including a cabinet body 1, a cabinet door 2 is movably connected inside the cabinet body 1, a connecting frame 3 is fixed inside the cabinet body 1, a mounting frame 4 is arranged inside the connecting frame 3, a supporting block 7 is movably connected inside the mounting frame 4, a disassembly mechanism 8 is installed outside the supporting block 7, a limiting mechanism 9 is installed inside the supporting block 7, a first limiting rod 5 is arranged inside the mounting frame 4, a limiting bolt 6 is threadedly connected to the outside of the first limiting rod 5, a limiting plate 10 is fixed to the outside of the supporting block 7, and a top of the mounting frame 4 is provided with a There is a heat dissipation cable groove 11, an electrical control element 12 is fixed to the outside of the mounting frame 4, a limiting hole is opened on the outer wall of the connecting frame 3, and the limiting holes are arranged in several groups and are distributed at equal intervals. The first limiting rod 5 is provided with three groups, and the limiting bolts 6 are provided with two groups that are symmetrically distributed about the central axis of the first limiting rod 5. The support block 7 is provided with two groups that are symmetrically distributed about the central axis of the mounting frame 4. The support block 7 and the mounting frame 4 are slidably connected, and the limiting plates 10 are provided with two groups that are symmetrically distributed about the central axis of the support block 7. Several groups of electrical control elements 12 are provided.

[0023] The above scheme is adopted: by pushing the support block 7, the position of the support block 7 is moved between the three groups of first limit rods 5, so that the support block 7 is stuck between the three groups of first limit rods 5 and the limit bolts 6 due to its own shape, thereby avoiding the first limit rods 5 from shaking and ensuring the strength of the first limit rods 5 and the limit bolts 6 to fix the mounting frame 4. The user can wind and organize the wiring of the electrical control component 12 through the heat dissipation cable trough 11. The heat dissipation cable trough 11 is hollow in design, which improves the heat dissipation performance of the device.

[0024] like Figures 1 to 5 As shown, the disassembly and assembly mechanism 8 includes a connecting seat 801, a second limiting rod 802 and a first limiting plate 803. The connecting seat 801 is fixed to the outside of the supporting block 7. The second limiting rod 802 is fixed to the outside of the connecting seat 801. The first limiting plate 803 is fixed to the outside of the second limiting rod 802. The second limiting rod 802 is sleeved with a second limiting plate 804 on the outside. The connecting seat 801 is provided with four groups. The connecting seat 801 is symmetrically distributed about the central axis of the supporting block 7. The outer wall of the second limiting rod 802 fits the inner wall of the second limiting plate 804. The second limiting rod 802 and the second limiting plate 804 are slidably connected. The diameter of the second limiting plate 804 is larger than the diameter of the first limiting plate 803.

[0025] like Figures 1 to 5 As shown, the mounting frame 4 is externally fixed with a limiting seat 805, and the limiting seat 805 is provided with four groups. The limiting seats 805 are symmetrically distributed about the central axis of the mounting frame 4, and a limiting groove is provided at the end of the limiting seat 805 close to the connecting seat 801, and the diameter of the limiting groove is larger than the diameters of the second limiting plate 804 and the first limiting plate 803. The limiting seat 805 is internally movably connected with a third limiting rod 806, and the third limiting rod 806 is externally sleeved with a first return spring 807. The third limiting rod 806 is externally fixed with a limiting block 808, and the third limiting rod 806 is provided with two groups symmetrically distributed about the central axis of the limiting seat 805, and the outer wall of the third limiting rod 806 fits the inner wall of the limiting seat 805, and the third limiting rod 806 is slidably connected to the limiting seat 805, and the first return spring 807 is used to squeeze the third limiting rod 806 and the limiting block 808 and keep them moving inward.

[0026] The above scheme is adopted: by driving the first limit plate 803 to move when pushing the support block 7, so that after the first limit plate 803 squeezes the limit block 808, the limit block 808 contracts inward, and after the first limit plate 803 passes, the first return spring 807 resets the limit block 808, so that the limit block 808 is stuck at the bottom end of the first limit plate 803, and then the first limit plate 803 is limited, so that the support block 7 and the mounting frame 4 are connected, thereby ensuring that the position of the support block 7 will not be dislocated When removing, continue to press the support block 7 so that the second limit plate 804 squeezes the limit block 808, and the limit block 808 shrinks inward. After the second limit plate 804 passes, the first reset spring 807 resets the limit block 808, and then the second limit plate 804 is lifted up by the limit block 808, so that the second limit plate 804 and the first limit plate 803 are in contact. At this time, pull the support block 7 to separate the support block 7 from between the three groups of first limit rods 5, and then remove the mounting frame 4.

[0027] like Figures 1 to 8As shown, the limiting mechanism 9 includes a first limiting member 901, a second limiting member 902 and a second return spring 903. The first limiting member 901 is movably connected to the inside of the support block 7, and the second limiting member 902 is movably connected to the inside of the support block 7. The second return spring 903 is fixed to the top of the first limiting member 901, and the second return spring 903 is fixed to the top of the second limiting member 902. A winding rod 904 is rotatably connected to the inside of the support block 7. The first limiting member 901 is slidably connected to the support block 7, and the second limiting member 902 is slidably connected to the support block 7. The second return spring 903 is used to squeeze the first limiting member 901 and the second limiting member 902 and keep them moving outward. Two groups of winding rods 904 are provided, and the winding rods 904 are symmetrically distributed with respect to the device of the support block 7. The second limiting member 902 is fixed to the top of the connecting line 905, and the first limiting member 901 is fixed to the bottom of the connecting line 905.

[0028] like Figures 1 to 8 As shown, the outer sleeve of the winding rod 904 is provided with a connecting line 905, the outer part of the winding rod 904 is fixed with a gear 906, the outer part of the support block 7 is movably connected with a trigger member 907, the top of the trigger member 907 is fixed with a shift block 908, the outer wall of the trigger member 907 is provided with a plurality of groups of teeth, the trigger member 907 and the gear 906 are meshingly connected, the outer wall of the trigger member 907 fits the inner wall of the support block 7, and the trigger member 907 and the support block 7 are slidably connected.

[0029] The above scheme is adopted: when inserting the support block 7, pressing the dial block 908 makes the trigger member 907 move downward to drive the gear 906 to rotate, and then the rotation of the gear 906 drives the winding rod 904 to rotate so that the winding rod 904 winds up the connecting line 905, and then the first limit member 901 and the second limit member 902 are contracted. After the insertion of the support block 7 is completed, the hand is released, and the second return spring 903 pushes the first limit member 901 and the second limit member 902 to expand, so that the first limit member 901 and the second limit member 902 are located at one end of the three groups of first limit rods 5, and then the support block 7 is limited by the first limit rod 5, and the exposed length of the first limit member 901 and the second limit member 902 is the radius of the first limit rod 5, so that when the first limit member 901 and the second limit member 902 below are in contact, the middle first limit rod 5 can be wrapped, thereby improving the strength of strengthening and fixing the first limit rod 5.

[0030] The working principle and use process of the present invention are as follows: by pushing the support block 7, the position of the support block 7 is moved between the three groups of first limit rods 5, so that the support block 7 is stuck between the three groups of first limit rods 5 and the limit bolts 6 through its own shape, thereby avoiding the first limit rods 5 from shaking and ensuring the strength of the first limit rods 5 and the limit bolts 6 to fix the mounting frame 4. When pushing the support block 7, the first limit plate 803 is driven to move, so that after the first limit plate 803 squeezes the limit block 808, the limit block 808 contracts inwardly, and after the first limit plate 803 passes, the first return spring 807 moves the limit block 808 The first limit plate 803 is reset, so that the limit block 808 is stuck at the bottom end of the first limit plate 803, and then the first limit plate 803 is limited, so that the support block 7 is connected to the mounting frame 4, so as to ensure that the position of the support block 7 will not be separated, and when removing, the support block 7 is continued to be pressed, so that the second limit plate 804 squeezes the limit block 808, and the limit block 808 shrinks inwardly, and after the second limit plate 804 passes, the first reset spring 807 resets the limit block 808, and then the second limit plate 804 is lifted up by the limit block 808, so that the second limit plate 804 and the first limit plate 803 are in contact. At this time, the support block 7 can be pulled to separate the support block 7 from between the three groups of first limiting rods 5, thereby removing the mounting frame 4, and when inserting the support block 7, pressing the dial block 908 causes the trigger member 907 to move downward to drive the gear 906 to rotate, and then the rotation of the gear 906 drives the winding rod 904 to rotate so that the winding rod 904 winds up the connecting line 905, thereby contracting the first limiting member 901 and the second limiting member 902. After completing the insertion of the support block 7, let go, and the second return spring 903 pushes the first limiting member 901 and the second limiting member 902 to expand, so that the first limiting member 901 The second limiting member 902 is located at one end of the three groups of first limiting rods 5, and the support block 7 is limited by the first limiting rod 5, and the exposed length of the first limiting member 901 and the second limiting member 902 is the radius of the first limiting rod 5, so that when the first limiting member 901 and the second limiting member 902 below are in contact, the middle first limiting rod 5 can be wrapped, thereby improving the strength of strengthening the fixation of the first limiting rod 5, and the user can wind and organize the wiring of the electrical control component 12 through the heat dissipation cable groove 11. The heat dissipation cable groove 11 is hollow in design, which improves the heat dissipation performance of the device.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electrical control cabinet, comprising a cabinet body (1), characterized in that: The cabinet body (1) is movably connected to a cabinet door (2), a connecting frame (3) is fixed to the cabinet body (1), a mounting frame (4) is arranged inside the connecting frame (3), a supporting block (7) is movably connected to the mounting frame (4), a disassembly mechanism (8) is installed outside the supporting block (7), and a limiting mechanism (9) is installed inside the supporting block (7); The disassembly and assembly mechanism (8) comprises a connecting seat (801), a second limiting rod (802) and a first limiting plate (803); the connecting seat (801) is fixed to the outside of the supporting block (7); the second limiting rod (802) is fixed to the outside of the connecting seat (801); the first limiting plate (803) is fixed to the outside of the second limiting rod (802); and the second limiting plate (804) is sleeved on the outside of the second limiting rod (802); The limiting mechanism (9) comprises a first limiting member (901), a second limiting member (902) and a second return spring (903); the first limiting member (901) is movably connected to the inside of the support block (7); the second limiting member (902) is movably connected to the inside of the support block (7); the second return spring (903) is fixed to the top end of the first limiting member (901); the second return spring (903) is fixed to the top end of the second return spring (903); a winding rod (904) is rotatably connected to the inside of the support block (7); and a connecting line (905) is sleeved on the outside of the winding rod (904).

2. The electrical control cabinet according to claim 1, characterized in that: The mounting frame (4) is externally fixed with a limiting seat (805), the limiting seat (805) is internally movably connected with a third limiting rod (806), the third limiting rod (806) is externally sleeved with a first return spring (807), and the third limiting rod (806) is externally fixed with a limiting block (808).

3. The electrical control cabinet according to claim 1, characterized in that: The connecting seats (801) are provided in four groups. The connecting seats (801) are symmetrically distributed about the central axis of the support block (7). The outer wall of the second limiting rod (802) fits the inner wall of the second limiting plate (804). The second limiting rod (802) and the second limiting plate (804) are slidably connected. The diameter of the second limiting plate (804) is greater than the diameter of the first limiting plate (803).

4. The electrical control cabinet according to claim 2, characterized in that: Four groups of the limiting seats (805) are provided, and the limiting seats (805) are symmetrically distributed about the central axis of the mounting frame (4). The limiting seats (805) are provided with limiting grooves at the ends close to the connecting seats (801), and the diameter of the limiting grooves is greater than the diameters of the second limiting plate (804) and the first limiting plate (803).

5. The electrical control cabinet according to claim 2, characterized in that: The third limiting rod (806) is provided with two groups symmetrically distributed about the central axis of the limiting seat (805); the outer wall of the third limiting rod (806) fits the inner wall of the limiting seat (805); the third limiting rod (806) and the limiting seat (805) are slidably connected; the first return spring (807) is used to squeeze the third limiting rod (806) and the limiting block (808) and keep them moving inward.

6. The electrical control cabinet according to claim 1, characterized in that: A gear (906) is fixed to the outside of the reeling rod (904), a trigger member (907) is movably connected to the outside of the support block (7), and a shifting block (908) is fixed to the top of the trigger member (907).

7. The electrical control cabinet according to claim 1, characterized in that: The first limiting member (901) is slidably connected to the support block (7), the second limiting member (902) is slidably connected to the support block (7), the second return spring (903) is used to squeeze the first limiting member (901) and the second limiting member (902) and keep them moving outward, two groups of winding rods (904) are provided, and the winding rods (904) are symmetrically distributed with respect to the support block (7), the second limiting member (902) is fixed to the top end of the connecting line (905), and the first limiting member (901) is fixed to the bottom end of the connecting line (905).

8. The electrical control cabinet according to claim 6, characterized in that: The outer wall of the trigger member (907) is provided with a plurality of groups of teeth, the trigger member (907) and the gear (906) are meshingly connected, the outer wall of the trigger member (907) fits against the inner wall of the support block (7), and the trigger member (907) and the support block (7) are slidably connected.

9. The electrical control cabinet according to claim 1, characterized in that: A first limiting rod (5) is arranged inside the mounting frame (4), the first limiting rod (5) is externally threadedly connected to a limiting bolt (6), a limiting plate (10) is fixed to the outside of the support block (7), a heat dissipation cable groove (11) is provided at the top of the mounting frame (4), and an electrical control element (12) is fixed to the outside of the mounting frame (4).

10. The electrical control cabinet according to claim 9, characterized in that: The outer wall of the connecting frame (3) is provided with a plurality of limit holes, the limit holes are arranged in a plurality of groups and are distributed at equal intervals, the first limit rod (5) is arranged in three groups, the limit bolts (6) are arranged in two groups and are symmetrically distributed about the central axis of the first limit rod (5), the support block (7) is arranged in two groups and are symmetrically distributed about the central axis of the mounting frame (4), the support block (7) and the mounting frame (4) are slidably connected, the limit plates (10) are arranged in two groups and are symmetrically distributed about the central axis of the support block (7), and the electrical control elements (12) are arranged in a plurality of groups.

Images