An electrical control cabinet

Abstract

The present invention belongs to the technical field of electrical control cabinets, and discloses an electrical control cabinet, which includes a cabinet body. A cabinet door is movably connected inside the cabinet body. A connecting frame is fixed inside the cabinet body. An installation frame is arranged inside the connecting frame. A support block is movably connected inside the installation frame. A disassembly and assembly mechanism is installed outside the support block. A limiting mechanism is installed inside the support block. Through the cooperation of structures such as the first limiting rod, the limiting bolt, and the support block, after the device uses three groups of first limiting rods and limiting bolts to connect the installation frame and the connecting frame, the support block is pushed, and the position of the support block is moved between the three groups of first limiting rods, so that the support block is stuck between the three groups of first limiting rods and the limiting bolts through its own shape, thereby avoiding the shaking of the first limiting rod and ensuring the strength of the first limiting rod and the limiting bolt for fixing the installation frame, so as to achieve the purpose of facilitating the device to strengthen the fixation of the connection of the installation frame.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical control cabinets, and specifically relates to an electrical control cabinet. Background Art

[0002] A control cabinet generally refers to a metal cabinet for installing switch electrical appliances that control the operation of electrical appliances. Control cabinets are classified into electrical control cabinets, frequency conversion control cabinets, low-voltage control cabinets, high-voltage control cabinets, water pump control cabinets, power supply control cabinets, explosion-proof control cabinets, elevator control cabinets, PLC control cabinets, fire control cabinets, brick machine control cabinets, etc. Existing electrical control cabinets generally use general finished power distribution cabinet bodies. Guide rails for fixing switch electrical appliances are installed on the support bottom plate of the product power distribution cabinet, or the switch electrical appliances are directly installed on the support bottom plate. A plastic wire trough is installed above and below each row of switch electrical appliances for circuit wiring.

[0003] Patent Publication No. CN113241615A discloses an electrical control cabinet, belonging to the technical field of electrical control. It includes a cabinet body. An assembly layout surface is provided inside the cabinet body. Corresponding auxiliary connection parts are provided on the assembly layout surface. Path expansion parts for controlling the reserved amount of connection wires are symmetrically and movably connected to the auxiliary connection parts. 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. Through the combined action of the auxiliary connection part, the path expansion part, the force point transfer part, and the positioning component and the limiting component, a rigid expansion route is formed to accurately control the reserved amount of connection wires, effectively avoiding the waste of connection wires, greatly improving the neatness and aesthetics of the connection wire layout inside the control cabinet, correspondingly improving the neatness inside the control cabinet, and at the same time having the advantages of good stability, energy conservation and environmental protection, and space saving.

[0004] Installation brackets with holes are usually provided on the inner walls on both sides of the power distribution cabinet. The installation brackets in the prior art cannot freely install the electrical component support plate inside the electrical cabinet and ensure the strength between the connecting parts. Just connecting by means of bolt connecting rods cannot ensure the strength of the connection points. It is necessary to reinforce the connection points and enable the device to be quickly disassembled and assembled to improve the assembly efficiency. Summary of the Invention

[0005] To solve the problems raised in the above background art, 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 includes a cabinet body. A cabinet door is movably connected inside the cabinet body. A connection frame is fixed inside the cabinet body. An installation frame is provided inside the connection frame. A support block is movably connected inside the installation frame. A disassembly and assembly mechanism is installed outside the support block. A limiting mechanism is installed inside the support block;

[0007] The disassembly and assembly mechanism includes a connecting seat, a second limiting rod and a first limiting disc. The connecting seat is fixed to the outside of the support block. A second limiting rod is fixed to the outside of the connecting seat. A first limiting disc is fixed to the outside of the second limiting rod. A second limiting disc is sleeved on the outside of the second limiting rod.

[0008] 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 end of the first limiting member. The second limiting member is fixed to the top end of the second return spring. A winding rod is rotatably connected to the inside of the support block. A connecting line is sleeved on the outside of the winding rod.

[0009] Preferably, a limiting seat is fixed to the outside of the mounting bracket. A third limiting rod is movably connected to the inside of the limiting seat. A first return spring is sleeved on the outside of the third limiting rod. A limiting block is fixed to the outside of the third limiting rod.

[0010] Preferably, there are four groups of the connecting seats, and the connecting seats are symmetrically distributed about the central axis of the support block. The outer wall of the second limiting rod is attached to the inner wall of the second limiting disc. The second limiting rod and the second limiting disc are slidably connected. The diameter of the second limiting disc is larger than that of the first limiting disc.

[0011] Preferably, there are four groups of the limiting seats, and the limiting seats are symmetrically distributed about the central axis of the mounting bracket. A limiting groove is formed at the end of the limiting seat close to the connecting seat. The diameter of the limiting groove is larger than those of the second limiting disc and the first limiting disc.

[0012] Preferably, there are two groups of the third limiting rods, which are symmetrically distributed about the central axis of the limiting seat. The outer wall of the third limiting rod is attached to the inner wall of the limiting seat. The third limiting rod and the limiting seat are slidably connected. The first return spring is used to press the third limiting rod and the limiting block and keep them in a moving trend inward.

[0013] 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. A dial block is fixed to the top end of the trigger member.

[0014] Preferably, the first limiting member and the support block are slidably connected. The second limiting member and the support block are slidably connected. The second return spring is used to press the first limiting member and the second limiting member and keep them in a moving trend outward. There are two groups of the winding rods, and the winding rods are symmetrically distributed about the device of the support block. The top end of the connecting line is fixed to the second limiting member. The bottom end of the connecting line is fixed to the first limiting member.

[0015] Preferably, a number of groups of teeth are provided on the outer wall of the trigger member. The trigger member is meshed and connected with the gear. The outer wall of the trigger member is attached to the inner wall of the support block, and the trigger member is slidably connected with the support block.

[0016] Preferably, a first limiting rod is arranged inside the mounting frame. A limiting bolt is threadedly connected to the outside of the first limiting rod. A limiting plate is fixed to the outside of the support block. A heat dissipation and wire slot is provided at the top of the mounting frame. An electrical control element is fixed to the outside of the mounting frame.

[0017] Preferably, limiting holes are provided on the outer wall of the connecting frame. A number of groups of the limiting holes are arranged at equal intervals. Three groups of the first limiting rods are provided. Two groups of the limiting bolts are symmetrically distributed about the central axis of the first limiting rod. Two groups of the support blocks are symmetrically distributed about the central axis of the mounting frame. The support block is slidably connected with the mounting frame. Two groups of the limiting plates are symmetrically distributed about the central axis of the support block. A number of groups of the electrical control elements are provided.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] Through the cooperation of structures such as the first limiting rod, the limiting bolt, and the support block, the device can connect the mounting frame and the connecting frame with three groups of the first limiting rods and the limiting bolts, and then push the support block to move the position of the support block between the three groups of the first limiting rods, so that the support block is stuck between the three groups of the first limiting rods and the limiting bolts by its own shape, thereby preventing the first limiting rod from shaking and ensuring the strength of the first limiting rod and the limiting bolt for fixing the mounting frame, so as to achieve the purpose of facilitating the device to strengthen the fixation at the connection of the mounting frame.

[0020] Through the cooperation of structures such as the connection seat, the second limiting rod, and the first limiting disc, the device can drive the first limiting disc to move when pushing the support block. After the first limiting disc presses the limiting block, the limiting block contracts inward, and after the first limiting disc passes, the first return spring resets the limiting block, so that the limiting block is stuck at the bottom of the first limiting disc, thereby limiting the first limiting disc, connecting the support block and the mounting frame, and further ensuring that the position of the support block will not deviate, further ensuring the purpose of strengthening the fixation.

[0021] 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

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall internal structure of the present invention;

[0024] Figure 3 It is a right side structural schematic diagram of the mounting frame of the present invention;

[0025] Figure 4 It is a schematic diagram of a partial cross-sectional structure of the mounting frame of the present invention;

[0026] Figure 5 It is a schematic diagram of the disassembly and assembly mechanism structure of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the limiting mechanism of the present invention;

[0028] 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;

[0029] Figure 8 It is a partial structural schematic diagram of the limiting mechanism of the present invention.

[0030] 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

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] As Figures 1 to 8 shown, the present invention provides an electrical control cabinet, which includes 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. An installation frame 4 is arranged inside the connecting frame 3. A support block 7 is movably connected inside the installation frame 4. A disassembly and assembly mechanism 8 is installed outside the support block 7. A limiting mechanism 9 is installed inside the support block 7. A first limiting rod 5 is arranged inside the installation 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 support block 7. A heat dissipation and wire slot 11 is opened at the top of the installation frame 4. Electrical control components 12 are fixed to the outside of the installation frame 4. Limiting holes are opened on the outer wall of the connecting frame 3. There are several groups of limiting holes arranged at equal intervals. There are three groups of first limiting rods 5. There are two groups of limiting bolts 6 symmetrically distributed about the central axis of the first limiting rod 5. There are two groups of support blocks 7 symmetrically distributed about the central axis of the installation frame 4. The support block 7 and the installation frame 4 are slidably connected. There are two groups of limiting plates 10 symmetrically distributed about the central axis of the support block 7. There are several groups of electrical control components 12.

[0033] Adopting the above solution: By pushing the support block 7, the position of the support block 7 is moved between the three groups of first limiting rods 5, so that the support block 7 is stuck between the three groups of first limiting rods 5 and the limiting bolts 6 through its own shape, thereby avoiding the shaking of the first limiting rod 5 and ensuring the strength of the first limiting rod 5 and the limiting bolt 6 for fixing the installation frame 4. Users can wind and arrange the wiring of the electrical control components 12 through the heat dissipation and wire slot 11. The heat dissipation and wire slot 11 is of a hollow design, improving the heat dissipation performance of the device.

[0034] As Figures 1 to 5 shown, the disassembly and assembly mechanism 8 includes a connecting seat 801, a second limiting rod 802 and a first limiting disc 803. The connecting seat 801 is fixed to the outside of the support block 7. A second limiting rod 802 is fixed to the outside of the connecting seat 801. A first limiting disc 803 is fixed to the outside of the second limiting rod 802. A second limiting disc 804 is sleeved on the outside of the second limiting rod 802. There are four groups of connecting seats 801. 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 is in contact with the inner wall of the second limiting disc 804. The second limiting rod 802 and the second limiting disc 804 are slidably connected. The diameter of the second limiting disc 804 is larger than the diameter of the first limiting disc 803.

[0035] As Figures 1 to 5 shown, there are four limit seats 805 fixed to the outside of the mounting bracket 4. The limit seats 805 are symmetrically distributed about the central axis of the mounting bracket 4. A limit groove is provided at the end of the limit seat 805 close to the connecting seat 801. The diameter of the limit groove is larger than the diameters of the second limit disc 804 and the first limit disc 803. A third limit rod 806 is movably connected inside the limit seat 805. A first return spring 807 is sleeved on the outside of the third limit rod 806. A limit block 808 is fixed to the outside of the third limit rod 806. There are two groups of the third limit rods 806 symmetrically distributed about the central axis of the limit seat 805. The outer wall of the third limit rod 806 is in contact with the inner wall of the limit seat 805. The third limit rod 806 is slidably connected to the limit seat 805. The first return spring 807 is used to squeeze the third limit rod 806 and the limit block 808 and keep them in a moving trend inward.

[0036] With the above solution: When the pushing support block 7 drives the first limit disc 803 to move, after the first limit disc 803 squeezes the limit block 808, the limit block 808 contracts inward. After the first limit disc 803 passes, the first return spring 807 resets the limit block 808, so that the limit block 808 is stuck at the bottom of the first limit disc 803, thereby limiting the first limit disc 803, connecting the support block 7 and the mounting bracket 4, and ensuring that the position of the support block 7 will not become disengaged. And when disassembling, continue to press the support block 7, so that the second limit disc 804 squeezes the limit block 808, the limit block 808 contracts inward. After the second limit disc 804 passes, the first return spring 807 resets the limit block 808, and then the limit block 808 jacks up the second limit disc 804, so that the second limit disc 804 contacts the first limit disc 803. At this time, pulling the support block 7 can disengage the support block 7 from between the three first limit rods 5, and then disassemble the mounting bracket 4.

[0037] As 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 inside the support block 7, and the second limiting member 902 is movably connected inside the support block 7. The top of the first limiting member 901 is fixed with the second return spring 903, and the top of the second return spring 903 is fixed with the second limiting member 902. A winding rod 904 is rotatably connected inside 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 in a moving-outward trend. There are two sets of winding rods 904, and the winding rods 904 are symmetrically distributed about the device of the support block 7. The top of the connecting line 905 is fixed with the second limiting member 902, and the bottom of the connecting line 905 is fixed with the first limiting member 901.

[0038] As Figures 1 to 8 As shown, a connecting line 905 is sleeved outside the winding rod 904, and a gear 906 is fixed outside the winding rod 904. A trigger member 907 is movably connected outside the support block 7. A dial block 908 is fixed at the top of the trigger member 907. A number of sets of teeth are provided on the outer wall of the trigger member 907. The trigger member 907 is meshed with the gear 906. The outer wall of the trigger member 907 is attached to the inner wall of the support block 7, and the trigger member 907 is slidably connected to the support block 7.

[0039] Adopting the above scheme: When inserting the support block 7, pressing the dial block 908 causes the trigger member 907 to move downward and drive the gear 906 to rotate. Then, the rotation of the gear 906 drives the winding rod 904 to rotate, so that the winding rod 904 winds the connecting line 905, and then contracts the first limiting member 901 and the second limiting member 902. After inserting the support block 7 and releasing the hand, the second return spring 903 pushes and expands the first limiting member 901 and the second limiting member 902, so that the first limiting member 901 and the second limiting member 902 are located at one end of the three first limiting rods 5. Then, the support block 7 is limited by the first limiting rods 5, and the exposed lengths of the first limiting member 901 and the second limiting member 902 are the radii of the first limiting rods 5, so that when the first limiting member 901 contacts the second limiting member 902 below, it can wrap one of the middle first limiting rods 5, thereby improving the strength of strengthening and fixing the first limiting rods 5.

[0040] Working principle and usage process of the present invention: By pushing the support block 7, the position of the support block 7 is moved between the three groups of first limiting rods 5, so that the support block 7 is stuck between the three groups of first limiting rods 5 and the limiting bolts 6 through its own shape, thereby avoiding the shaking of the first limiting rods 5 and ensuring the strength of the first limiting rods 5 and the limiting bolts 6 for fixing the mounting frame 4. When pushing the support block 7, the first limiting disc 803 is driven to act, so that after the first limiting disc 803 presses the limiting block 808, the limiting block 808 contracts inward, and after the first limiting disc 803 passes, the first return spring 807 resets the limiting block 808, so that the limiting block 808 is stuck at the bottom of the first limiting disc 803, thereby limiting the first limiting disc 803 and connecting the support block 7 and the mounting frame 4, thereby ensuring that the position of the support block 7 will not become detached. And when disassembling, continue to press the support block 7, so that the second limiting disc 804 presses the limiting block 808, the limiting block 808 contracts inward, and after the second limiting disc 804 passes, the first return spring 807 resets the limiting block 808, and then the limiting block 808 jacks up the second limiting disc 804, so that the second limiting disc 804 contacts the first limiting disc 803. At this time, pulling the support block 7 can detach the support block 7 from between the three groups of first limiting rods 5, thereby disassembling the mounting frame 4. And when inserting the support block 7, pressing the dial block 908 makes the trigger 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 the connecting wire 905, thereby contracting the first limiting member 901 and the second limiting member 902. After the insertion of the support block 7 is completed and the hand is released, 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 and the second limiting member 902 are located at one end of the three groups of first limiting rods 5, thereby limiting the support block 7 through the first limiting rods 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 contacts the second limiting member 902 below, the middle first limiting rod 5 can be wrapped, thereby improving the strength of strengthening and fixing the first limiting rod 5. The user can wind and arrange the wiring of the electrical control component 12 through the heat dissipation slot 11. The heat dissipation slot 11 is of a hollow design, which improves the heat dissipation performance of the device.

[0041] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0042] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. 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: A cabinet door (2) is movably connected inside the cabinet body (1). A connecting frame (3) is fixed inside the cabinet body (1). An installation frame (4) is arranged inside the connecting frame (3). A support block (7) is movably connected inside the installation frame (4). A disassembly and assembly mechanism (8) is installed outside the support block (7). A limiting mechanism (9) is installed inside the support block (7). The disassembly and assembly mechanism (8) includes a connecting seat (801), a second limiting rod (802) and a first limiting disc (803). The connecting seat (801) is fixed outside the support block (7). A second limiting rod (802) is fixed outside the connecting seat (801). A first limiting disc (803) is fixed outside the second limiting rod (802). A second limiting disc (804) is sleeved outside the second limiting rod (802). A limiting seat (805) is fixed outside the installation frame (4). A third limiting rod (806) is movably connected inside the limiting seat (805). A first return spring (807) is sleeved outside the third limiting rod (806). A limiting block (808) is fixed outside the third limiting rod (806). 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 inside the support block (7). The second limiting member (902) is movably connected inside the support block (7). A second return spring (903) is fixed at the top end of the first limiting member (901). The second return spring (903) is fixed at the top end of the second limiting member (902). A winding rod (904) is rotatably connected inside the support block (7). A connecting line (905) is sleeved outside the winding rod (904).

2. The electrical control cabinet according to claim 1, characterized in that: There are four groups of the connecting seats (801). 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) is in contact with the inner wall of the second limiting disc (804). The second limiting rod (802) and the second limiting disc (804) are slidably connected. The diameter of the second limiting disc (804) is larger than the diameter of the first limiting disc (803).

3. The electric control cabinet according to claim 2, wherein: There are four groups of the limiting seats (805). The limiting seats (805) are symmetrically distributed about the central axis of the installation frame (4). A limiting groove is formed at the end of the limiting seat (805) close to the connecting seat (801). The diameter of the limiting groove is larger than the diameters of the second limiting disc (804) and the first limiting disc (803).

4. The electrical control cabinet according to claim 2, characterized in that: There are two groups of the third limiting rods (806) which are symmetrically distributed about the central axis of the limiting seat (805). The outer wall of the third limiting rod (806) is in contact with 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 in a moving trend inward.

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

6. 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 in a tendency to move outward. There are two sets of winding rods (904), and the winding rods (904) are symmetrically distributed about the device of the support block (7). The top end of the connecting line (905) is fixed to the second limiting member (902), and the bottom end of the connecting line (905) is fixed to the first limiting member (901).

7. The electric control cabinet according to claim 5, characterized in that: A number of groups of teeth are provided on the outer wall of the trigger member (907), the trigger member (907) is meshed with the gear (906), the outer wall of the trigger member (907) is attached to the inner wall of the support block (7), and the trigger member (907) is slidably connected to the support block (7).

8. The electrical control cabinet according to claim 1, wherein: A first limiting rod (5) is provided 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 support block (7), a heat dissipation slot (11) is provided at the top end of the mounting frame (4), and an electrical control component (12) is fixed to the outside of the mounting frame (4).

9. The electrical control cabinet according to claim 8, characterized in that: Limit holes are provided on the outer wall of the connecting frame (3), and a number of groups of the limit holes are equally spaced. There are three sets of the first limiting rods (5), two sets of the limiting bolts (6) are symmetrically distributed about the central axis of the first limiting rod (5), two sets of the support blocks (7) are symmetrically distributed about the central axis of the mounting frame (4), the support blocks (7) are slidably connected to the mounting frame (4), two sets of the limiting plates (10) are symmetrically distributed about the central axis of the support blocks (7), and a number of groups of the electrical control components (12) are provided.

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