Multi-station programmed operating mechanism

Abstract

The utility model discloses a multi-station programmed operating mechanism which comprises an installation supporting system, a main shaft transmission system and a transmission output system, and the transmission output system comprises a transmission shaft installed on the installation supporting system and at least one switch transmission plate rotatably installed on the transmission shaft. The main shaft transmission system comprises a main shaft rotationally mounted on the mounting and supporting system, at least one crank arm fixed on the main shaft and an operation board, an operation hole for inserting an operation handle is formed in the operation board, and a shifting mechanism for shifting the switch transmission plate to rotate is arranged between the switch transmission plate and the crank arm. According to the utility model, the disconnecting switch and the grounding switch of the switch cabinet can be operated in sequence according to a specified program, the misoperation risk is avoided, the switch cabinet has good adaptability, the structure is compact, the size is small, the performance is stable, the safety is high, the engineering adaptability is strong, the serialization degree is high, the installation, the operation, the maintenance, the disassembly and the replacement are easy, and the old switch cabinet can be transformed. The method can be used in novel switch cabinet manufacturing.

Description

TECHNICAL FIELD

[0001] The utility model belongs to 3.6kV~40.5kV high voltage switch cabinet field, especially relate to a kind of multi-station programmed operating mechanism suitable for switching device and control device. BACKGROUND

[0002] High voltage switch cabinet is switching device and control device, it is according to the relevant standard of certain line scheme to be assembled together with relevant primary and secondary equipment and become a kind of high voltage complete distribution device, in power plant and distribution station as control and protection generator, transformer and high voltage line, also can be used as the starting and protection of large high voltage alternating current motor.

[0003] At present, the 3.6kV~40.5kV air insulation high voltage switch cabinet of each substation operation and each manufacturer production and supply is divided into armored moving type and armored fixed type according to structural form.The characteristics of armored fixed type metal-enclosed switch cabinet are: high voltage circuit breaker and other main electrical components are fixedly installed, connection is reliable, power supply is reliable. Due to the difference of user's habit and demand, armored fixed type switch cabinet has obvious market requirement, and is used in large quantities. However, the control circuit of fixed type switch cabinet is less, occupies large space, brings inconvenience to production, storage and maintenance, and manual direct operation is mainly used, when equipment fails and needs to be overhauled, high voltage circuit breaker and other components are not easy to replace, and it is inconvenient to overhaul, computer intelligent operation and management cannot be realized, and it is difficult to realize more complex control logic.

[0004] With the development of power grid infrastructure construction and power energy investment, the demand for electrical complete equipment increases year by year, the product upgrading speed accelerates, the intelligentization, primary and secondary integration technology and integrated integration of electrical equipment have been obviously improved, which includes the collection and monitoring of distribution network data, distribution geographic information system and demand management, intelligent switch cabinet is born, intelligent switch cabinet is based on the ordinary switch cabinet with analog instrument and relay as monitoring and control equipment, cooperates with new intelligent instrument, realizes the monitoring of voltage, current, active power, reactive power, power factor, frequency, electric quantity and other electrical parameters of each power supply and distribution circuit, the monitoring of the breaking state and fault information of circuit breaker, the control of the breaking state of circuit breaker, cooperates with various perfect remote monitoring software, realizes the functions such as "four remote".

[0005] The intelligent switch cabinet changes the concept of the traditional switch cabinet, has the characteristics of multifunction, digitization, networking, intelligence, compact structure, easy maintenance and the like, can meet the future needs of the electric power industry, has the advantages of preventing / avoiding accidents, reducing equipment maintenance and repair time, realizing data resource sharing and the like. However, the basis for realizing the intelligence of the fixed switch cabinet is the electrification of the operation of the switch cabinet. For the armored fixed switch cabinet, the typical scheme includes that the upper isolation switch, the upper grounding switch, the lower isolation switch and the grounding switch all need to realize the electric operation, and the intelligence (intelligent control) of the switch cabinet can be better realized. Since there are many manufacturers of the armored fixed switch cabinet, the use amount is large and wide, the cabinet types are not unified, the operation modes are not unified, the installation sizes of the internal components of the switch cabinet are greatly different, and the schemes are various, so it is difficult to realize the electric operation of the armored fixed switch cabinet, especially the electric reform of the old switch cabinet.

[0006] In addition, in order to ensure safety and facilitate operation, the relevant national standards, industry standards and users have proposed the demand for mechanical interlocking of the fixed switch cabinet; the interlocking should be arranged between different elements of the fixed switch cabinet, and the mechanical interlocking is preferentially adopted, and the operation and interlocking requirements are as follows:

[0007] (1) Only when the circuit breaker is in the open position, the isolation switch can be operated to open and close.

[0008] (2) If the isolation switch itself has a grounding switch, the interlocking should be arranged to ensure the program of the action of the two, and the insulation level requirement in the movement process should also be considered.

[0009] (3) Only when the isolation switches on both sides of the circuit breaker are in the closed, open or grounded state, the circuit breaker can be operated. Practical new type content

[0010] The utility model discloses a kind of multi-station programmatic operating mechanisms which can realize multi-station, programmatic operation between multiple components in switch cabinet.

[0011] The utility model discloses a kind of multi-station programmatic operating mechanisms which can realize multi-station, programmatic operation between multiple components in switch cabinet.

[0012] The utility model discloses a switch cabinet is provided with the mechanism, the mechanism is arranged in the switch cabinet, and the mechanism is used for realizing the sequential operation between the disconnecting switch and the grounding switch in the switch cabinet according to the prescribed procedure.

[0013] The utility model discloses a main shaft drive system includes the cam for with microswitch cooperation realizes electrical interlocking, the cam is fixed at the end of main shaft.

[0014] The utility model discloses the operation hole is four and along the even distribution of the circumference of operation disc, the switch drive plate and the crank are two or more and along the length direction of respective axle parallel interval arrangement, and each crank is even distribution along the circumference of main shaft, and the crank is with switch drive plate one to one, and the dialing mechanism is located between each crank and corresponding switch drive plate.

[0015] The utility model discloses the dialing mechanism includes the roller of being arranged at the distal end of crank and the notch of being arranged on the roller rolling groove of switch drive board, the roller rolling groove is adapted with the roller, and through the rotation of operating handle operation disc drive crank rotation makes the roller enter roller rolling groove to dial switch drive board rotation.

[0016] The utility model is equipped with the upper stop axle of being located above and the lower stop axle of being located below on the installation support system and close to operation disc to limit the angle of operating handle up and down rotation. The angle is preferably 90 DEG.

[0017] The utility model discloses the installation support system is by a plurality of mounting plates through detachable connecting structure and is composed of detachable clamping plate type structure.

[0018] Compared with the prior art, the utility model has the following remarkable effects:

[0019] (1) the utility model realizes the sequential operation between the disconnecting switch and the grounding switch in the switch cabinet according to the prescribed procedure, and the mechanism has good adaptability with the switch cabinet, and the mechanism is compact in structure, small in size, stable in performance, high in safety, strong in engineering adaptability and high in serialization degree, is convenient for installation, operation, maintenance, disassembly and replacement, can reform the old switch cabinet, and can directly adopt in the manufacture of new switch cabinet.

[0020] (2) The utility model integrates the operation sequence of the disconnector and the grounding switch, and sequentially opens the corresponding operation position of the switch, as long as the mechanical design sequence of the upper grounding switch, the lower grounding switch, the upper disconnector and the lower disconnector is carried out, the possibility of misoperation between the disconnector and the grounding switch can be completely avoided from the structure, the mechanical interlocking between the upper grounding switch, the lower grounding switch, the upper disconnector and the lower disconnector is not needed, and the misoperation between the switches can be prevented; It is superior to the requirements of the current national, industry and other standards.

[0021] (3) The utility model supports the electric operation of the sequential control, in addition to the initial position and the final position of the output crank of the transmission plate of the upper grounding switch, the lower grounding switch, the upper disconnector and the lower disconnector, the length of the external connecting rod and the type of the switch are different, and the other parameter designs are same, a unified parameter design method is provided for realizing the programmed and electric operation of the multiple components between the switch cabinet.

[0022] (4) The utility model can be modularized combination, covers the scheme of installing two grounding switches, two disconnectors and a circuit breaker in the fixed switch cabinet, according to the design requirements, the grounding switch or the disconnector can be reduced at will, and the programmed operation can also be realized.

[0023] (5) The design, trial production and batch production of the transmission device of the utility model provide the design parameters of interchangeable parts, and the transmission device processing parts are unified, so that investment and equipment cost are saved. BRIEF DESCRIPTION OF DRAWINGS

[0024] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0025] Figure 1 It is the front view of the utility model;

[0026] Figure 2 It is the top view of the utility model;

[0027] Figure 3 It is the front view of the operation disc of the utility model;

[0028] Figure 4 It is the side view of the crank of the utility model;

[0029] Figure 5 It is the front view of the crank of the utility model;

[0030] Figure 6 It is the structure schematic view of the crank of the utility model along the circumference of the main shaft;

[0031] Figure 7 It is the front view of the upper grounding switch output plate of the utility model;

[0032] Figure 8 This is a front view of the grounding and switching output board of this utility model;

[0033] Figure 9 This is a front view of the upper isolation and separation output plate of this utility model;

[0034] Figure 10 This is a front view of the lower isolation and separation output plate of this utility model;

[0035] Figure 11 This is one of the schematic diagrams illustrating the motion principle of this utility model;

[0036] Figure 12 This is the second schematic diagram of the motion principle of this utility model;

[0037] Figure 13 This is a schematic diagram of the working logic of this utility model.

[0038] In the diagram: 1-Mounting support system, 2-Main spindle drive system, 3-Transmission output system; 4-Upper stop shaft, 5-Upper operating hole, 6-Lower operating hole, 7-Lower stop shaft, 8-Roller rolling groove, 9-Operating handle, 1.1-Left side plate, 1.2-Double-ended bolt, 1.3-Right side plate, 1.4-First positioning sleeve, 1.5-Support plate, 1.6-Mounting plate, 1.7-Reinforcing bent plate, 1.8-Welding nut, 1.9-Nut, 2.1-First shaft end retaining ring. 2.2-Main shaft, 2.3-Second positioning sleeve, 2.4-Shaft pin, 2.5-Crank arm, 2.6-Roller, 2.7-Operating panel, 2.8-Bearing sleeve, 2.9-Cam, 2.10-First bolt, 3.1-Second bolt, 3.2-Second shaft end retaining ring, 3.3-Third positioning sleeve, 3.4-Drive shaft, 3.5-Upper grounding switch drive plate, 3.6-Lower grounding switch drive plate, 3.7-Lower disconnecting switch drive plate, 3.8-Upper disconnecting switch drive plate. Detailed Implementation

[0039] The present invention will now be described in detail with reference to the embodiments and accompanying drawings to help those skilled in the art better understand the inventive concept of the present invention. However, the scope of protection of the claims of the present invention is not limited to the following embodiments. For those skilled in the art, all other embodiments obtained without creative effort without departing from the inventive concept of the present invention are within the scope of protection of the present invention.

[0040] like Figures 1-13As shown, this utility model discloses a multi-station programmed operating mechanism, comprising a mounting support system 1, a spindle transmission system 2, and a transmission output system 3. The mounting support system 1 consists of a left side plate 1.1, a double-ended bolt 1.2, a right side plate 1.3, a first positioning sleeve 1.4, a support plate 1.5, a mounting plate 1.6, a reinforcing bent plate 1.7, a welding nut 1.8, and a nut 1.9. This mounting support system is a detachable clamp-type structure composed of several mounting plates connected by a detachable connection structure. Welded nuts are provided in locations where manual or tool installation is difficult, ensuring convenient assembly and disassembly of the system. The spindle transmission system 2 and the transmission output system 3 are mounted on it.

[0041] The spindle drive system 2 includes a spindle 2.2 rotatably mounted on the mounting support system 1 via a bearing sleeve 2.8, a crank arm 2.5 fixed on the spindle 2.2, an operating disc 2.7, and a cam 2.9 for electrical interlocking with a micro switch. The spindle 2.2 has a hexagonal cross-section, and the mounting holes for the operating disc 2.7 and the crank arm 2.5 are hexagonal and fit with the spindle 2.2. When the spindle 2.2 rotates, the operating disc 2.7, the crank arm 2.5, and the spindle 2.2 rotate together as a unit. A second positioning sleeve 2.3 mounted on the spindle 2.2 ensures that the distance between the crank arm 2.5 and the operating disc 2.7 is within a specified range. A first bolt 2.10 and a first shaft end retaining ring 2.1 are mounted at both ends of the spindle 2.2, ensuring that the spindle 2.2 is reliably mounted on the mounting support system. In the manual mechanism, cam 2.9 mainly performs the function of electrical interlocking. When the operating mechanism completes the power supply or power outage operation, cam 2.9 presses the micro switch to turn on the power or releases the micro switch to turn off the power, issuing a command or signal to prevent misoperation or malfunction.

[0042] The transmission output system 3 includes a transmission shaft 3.4 mounted on the mounting support system 1 and switch transmission plates rotatably mounted on the transmission shaft 3.4. The cross-section of the transmission shaft 3.4 is circular, and the mounting holes of each switch transmission plate are circular. Each switch transmission plate rotates on the transmission shaft 3.4 under the support of the transmission shaft 3.4. The third positioning sleeve 3.3 mounted on the transmission shaft 3.4 can ensure that the distance between each switch transmission plate is within a specified range. The second bolt 3.1 and the second shaft end retaining ring 3.2 are mounted at both ends of the transmission shaft 3.4, which can ensure that the transmission shaft 3.4 is reliably mounted on the mounting support system 1.

[0043] The operating panel 2.7 has four operating holes for inserting the operating handle 9, which are evenly distributed around the circumference of the operating panel 2.7. In this embodiment, there are two or more switch transmission plates and crank arms, which are arranged side by side at intervals along the length of their respective axes. Each crank arm is evenly distributed around the circumference of the main shaft, and each crank arm corresponds to a switch transmission plate. A toggle mechanism for rotating the switch transmission plate is provided between the switch transmission plate and the crank arm 2.5. Specifically, there are four crank arms 2.5 and four switch transmission plates. The four switch transmission plates are arranged in sequence as the upper grounding switch transmission plate 3.5, the lower grounding switch transmission plate 3.6, the lower isolating switch transmission plate 3.7, and the upper isolating switch transmission plate 3.8. Each crank arm corresponds to one switch transmission plate, that is, the four crank arms 2.5 from left to right correspond to the upper grounding switch transmission plate 3.5, the lower grounding switch transmission plate 3.6, the lower isolating switch transmission plate 3.7, and the upper isolating switch transmission plate 3.8, respectively. The actuating mechanism is located between each crank arm 2.5 and its corresponding switch transmission plate. The actuating mechanism includes a roller 2.6 located at the far end of the crank arm 2.5 and a notch-shaped roller rolling groove 8 located on the switch transmission plate. The roller rolling groove 8 is adapted to the roller 2.6. By rotating the operating handle 9 to turn the operating disk 2.7, the crank arm 2.5 is rotated, causing the roller 2.6 to enter the roller rolling groove 8, thereby actuating the switch transmission plate to rotate.

[0044] An upper stop shaft 4 is provided on the mounting support system 1 and near the operation panel 2.7, and a lower stop shaft 7 is provided above it to limit the angle of vertical rotation of the operation handle 9. In this embodiment, the angle is 90°.

[0045] like Figure 11 , Figure 12 As shown, the operating handle 9 is inserted into the upper operating hole 5 or the lower operating hole 6 directly opposite the mechanism. When the operating handle 9 is inserted into the upper operating hole 5, under the obstruction of the upper stop shaft 4, the operating handle 9 can only move downwards. Rotating the operating handle 9 downwards by 90 degrees rotates the other operating holes on the operating panel 2.7 to the position of the upper operating hole 5, and then removing the operating handle 9; then inserting the operating handle 9 back into the upper operating hole 5, and rotating the operating handle 9 downwards by 90 degrees to the stop position, allows for intermittent clockwise rotation of the four operating holes on the operating panel 2.7; conversely... When the operating handle 9 is inserted into the lower operating hole 6, the operating handle 9 is rotated upwards by 90 degrees to the stop position, and then the operating handle 9 is removed. Then the operating handle 9 is inserted into the upper operating hole 5, and the operating panel 2.7 can be rotated counterclockwise intermittently. If the operating handle 9 is not removed, the single operating hole of the operating panel 2.7 can be rotated forward and backward by 90 degrees repeatedly. At the same time, the design of the mechanism ensures that only two operating hole positions (upper operating hole 5 and lower operating hole 6) appear on the operating panel 2.7 at any time, and the operating handle 9 can be inserted to operate.

[0046] like Figures 4-6As shown, four crank arm transmission pairs, consisting of pin 2.4, crank arm 2.5, and roller 2.6, are installed. Viewed from the front, they are evenly spaced on the left side of the control panel 2.7. Viewed from the side, the crank arm transmission pairs are evenly distributed around a 360-degree circumference. Figure 11 , Figure 12 As shown, the structure and motion principle of the transmission system are as follows: When the operating disk 2.7 is rotated by the operating handle 9, the rotation direction, rotation sequence and intermittent pattern of each crank arm transmission pair are consistent with those of the operating disk 2.7. When the operating handle 9 can be inserted into the upper operating hole 5 or the lower operating hole 6 of the operating disk 2.7 to manually operate the mechanism, the rollers 2.6 on the crank arm transmission pair rotate into the roller rolling groove 8, which sequentially drives the upper grounding switch transmission plate 3.5, the lower grounding switch transmission plate 3.6, the lower isolating switch transmission plate 3.7 and the upper isolating switch transmission plate 3.8 corresponding to each crank arm transmission pair to rotate, thus completing the operation of the isolating switch and the grounding switch.

[0047] The upper grounding switch transmission plate 3.5, lower grounding switch transmission plate 3.6, lower disconnecting switch transmission plate 3.7, and upper disconnecting switch transmission plate 3.8 on the transmission shaft rotate around the transmission shaft 3.4. Viewed from the front, the four switch transmission plates are equidistant and correspond one-to-one with the crank arm transmission pairs. That is, the four crank arm transmission pairs, composed of the pin 2.4, crank arm 2.5, and roller 2.6, together with the upper grounding switch transmission plate 3.5, lower grounding switch transmission plate 3.6, lower disconnecting switch transmission plate 3.7, and upper disconnecting switch transmission plate 3.8, form four single-pin external grooved wheel mechanisms.

[0048] When the operating handle 9 is inserted into the operating panel 2.7 and the four operating holes of the operating panel are rotated clockwise intermittently, the four single-pin external grooved wheel mechanisms move in the same direction, sequence, and intermittent pattern as the operating panel 2.7. The rotation of the upper grounding switch transmission plate 3.5, lower grounding switch transmission plate 3.6, lower isolating switch transmission plate 3.7, and upper isolating switch transmission plate 3.8 outputs the set angle. When a reasonable output length is designed for each switch transmission plate, it can drive the rotating switch crank arms of the upper grounding switch, lower grounding switch, lower isolating switch, and upper isolating switch, together with their respective connecting rods, to form a four-bar linkage. This allows for the operation of closing and opening the upper grounding switch, lower grounding switch, lower isolating switch, and upper isolating switch. It also allows for the reasonable sequencing of the upper grounding switch, lower grounding switch, lower isolating switch, and upper isolating switch, forming a multi-station programmed operating mechanism to complete the power supply or de-energization operation of the switchgear.

[0049] The power supply and de-energization of the switchgear have a strict operating sequence, which is described in detail below:

[0050] Power outage operation: First, disconnect the circuit breaker, then disconnect the lower isolating switch → disconnect the upper isolating switch → close the lower grounding switch → close the upper grounding switch to complete the power outage operation.

[0051] Power supply operation: First, open the upper grounding switch → open the lower grounding switch → close the upper isolating switch → close the lower isolating switch, and then close the circuit breaker to complete the power supply operation.

[0052] Viewed from the front, this mechanism, through the arrangement of switch transmission plates and the definition of the rotation direction and angle of the operating panel 2.7 and the rotation direction and angle of the crank arm transmission pair, enables power outage and power supply operations of the switch cabinet. It also allows for maintenance, inspection, and debugging of each switch. Its operational logic diagram is shown below. Figure 13 .

[0053] Power supply operation:

[0054] Insert the operating handle 9 into the upper operating hole 5 of the operating panel 2.7, rotate the operating panel 2.7 clockwise 90°, turn on the grounding switch, and remove the operating handle 9;

[0055] Insert the operating handle 9 into the upper operating hole 5 of the operating panel 2.7, rotate the operating panel 2.7 clockwise 90°, turn off the grounding switch, and remove the operating handle 9;

[0056] Insert the operating handle 9 into the upper operating hole 5 of the operating panel 2.7, rotate the operating panel 2.7 clockwise 90°, then close the isolation switch and remove the operating handle 9.

[0057] Insert the operating handle 9 into the upper operating hole 5 of the operating panel 2.7, rotate the operating panel 2.7 clockwise 90°, then close the isolation switch and remove the operating handle 9.

[0058] After completing the operation of the disconnecting switch and grounding switch, close the circuit breaker and power is supplied.

[0059] Power outage procedures:

[0060] Circuit breaker, then:

[0061] Insert the operating handle 9 into the lower operating hole 6 of the operating panel 2.7, rotate the operating panel 2.7 counterclockwise 90°, → disconnect the isolating switch, and remove the operating handle 9;

[0062] Insert the operating handle 9 into the upper operating hole 6 of the operating panel 2.7, rotate the operating panel 2.7 counterclockwise 90°, → disconnect the isolating switch, and remove the operating handle 9;

[0063] Insert the operating handle 9 into the upper operating hole 6 of the operating panel 2.7, rotate the operating panel 2.7 counterclockwise 90°, then close the grounding switch and remove the operating handle 9.

[0064] Insert the operating handle 9 into the upper operating hole 6 of the operating panel 2.7, rotate the operating panel 2.7 counterclockwise 90°, then close the grounding switch and remove the operating handle 9; power outage complete.

[0065] Maintenance, inspection and debugging:

[0066] After the power outage is completed: Insert the operating handle 9 into the upper operating hole 5 or the lower operating hole 6 of the operating panel 2.7. The operating handle 9 can be rotated 90° forward / reverse to complete the opening / closing operation of a single switch, or the switching operation between switches can be completed in sequence. This facilitates the maintenance, inspection and debugging of each switch.

[0067] This utility model allows for modular assembly, covering a maximum of two grounding switches, two disconnect switches, and one circuit breaker installed in a fixed switchgear. Depending on design requirements, the number of grounding switches or disconnect switches can be arbitrarily reduced. Programmed operation is also possible: a 90-degree rotation of the control panel creates an independent operating unit, with a separate module for the transmission device, operating a single switch. Similarly, a 180-degree rotation of the control panel allows for two separate modules, and a 270-degree rotation allows for three separate modules. Examples include isolation cabinets with only disconnect switches and incoming line cabinets without lower grounding switches.

Claims

1. A multi-station programmed operating mechanism, characterized in that: The system includes a mounting support system, a spindle drive system, and a transmission output system. The transmission output system includes a drive shaft mounted on the mounting support system and at least one switch drive plate rotatably mounted on the drive shaft. The spindle drive system includes a spindle rotatably mounted on the mounting support system, at least one crank arm fixed on the spindle, and an operating disk. The operating disk has an operating hole for inserting an operating handle, and an actuating mechanism for rotating the switch drive plate is provided between the switch drive plate and the crank arm.

2. The multi-station programmed operating mechanism according to claim 1, characterized in that: The operation holes are four in number and are evenly distributed along the circumference of the operation disc. The switch transmission plate and the crank arm are two or more in number and are arranged side by side at intervals along the length of their respective axes. Each crank arm is evenly distributed along the circumference of the main shaft, and each crank arm corresponds to a switch transmission plate. The toggle mechanism is located between each crank arm and its corresponding switch transmission plate.

3. The multi-station programmed operating mechanism according to claim 2, characterized in that: The spindle drive system includes a cam for electrical interlocking with a micro switch, the cam being fixed to the end of the spindle.

4. The multi-station programmed operating mechanism according to claim 3, characterized in that: The actuation mechanism includes a roller located at the distal end of the crank arm and a notch-shaped roller rolling groove on the switch transmission plate. The roller rolling groove is adapted to the roller. By rotating the control plate with the operating handle, the crank arm is rotated, causing the roller to roll into the roller rolling groove, thereby actuating the switch transmission plate.

5. The multi-station programmed operating mechanism according to claim 4, characterized in that: The mounting support system has an upper stop shaft located above the control panel and a lower stop shaft located below the control panel to limit the angle of vertical rotation of the control handle.

6. The multi-station programmed operating mechanism according to claim 5, characterized in that: The angle is 90°.

7. The multi-station programmed operating mechanism according to claim 6, characterized in that: The installation support system is a detachable clamp-type structure composed of several mounting plates connected by a detachable connection structure.

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