Insulation protection device for disconnecting link of disconnecting switch

Abstract

The invention relates to the technical field of disconnecting switch disconnecting links, in particular to an insulation protection device for a disconnecting switch disconnecting link. The insulation protection device comprises a first adjusting mechanism, a second adjusting mechanism, an insulation protection shell and a transmission mechanism, the first adjusting mechanism is rotatably connected with the second adjusting mechanism, the second adjusting mechanism is rotatably connected with the transmission mechanism, and the transmission mechanism is detachably connected with the insulation protection shell. And the insulating protective shell is used for wrapping a silica gel insulator of the disconnecting link of the disconnecting switch. According to the invention, manual close-range insulation protection operation on the disconnecting switch knife switch is not needed, the operation difficulty and the safety risk of insulation protection can be reduced, the operation efficiency can be improved, and good insulation protection can be carried out on the disconnecting switch knife switch.

Description

Technical Field

[0001] The present application relates to the technical field of isolating switch knife switches, and in particular to an insulation protection device for isolating switch knife switches. Background Art

[0002] During the use of the current isolating switch knife switch, there is a risk of short circuit due to the lack of good insulation protection. At the same time, the isolating switch knife switch is usually set at a certain height from the ground, so there is also the problem of difficulty in performing insulation protection operations. In the related insulation protection technology, it is necessary to manually move a ladder or wear a sling device to the vicinity of the isolating switch knife switch for insulation protection. This operation method is cumbersome and inefficient, and the operator is more likely to be at risk of electric shock if he is too close to the isolating switch knife switch. Therefore, in the related technology, there are problems of difficulty in operation, low efficiency and high safety risks during the insulation protection operation. Summary of the Invention

[0003] The present application provides an insulation protection device for an isolating switch knife switch to solve one or more technical problems existing in the prior art and at least provide a beneficial option or create conditions.

[0004] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by practice of the present application.

[0005] According to one aspect of an embodiment of the present application, an insulation protection device for an isolating switch is provided. The insulation protection device includes a first adjustment mechanism, a second adjustment mechanism, an insulation protection housing, and a transmission mechanism. The first adjustment mechanism is rotatably connected to the second adjustment mechanism, the second adjustment mechanism is rotatably connected to the transmission mechanism, and the transmission mechanism is detachably connected to the insulation protection housing. The insulation protection housing is used to enclose a silicone insulator of the isolating switch.

[0006] In which, the original state of the insulating protective shell is a closed state. When the insulating protective shell is converted from the original state to the open state, the insulating protective shell is stretched open by the transmission mechanism to allow the silicone insulator to enter the insulating protective shell. When the transmission mechanism is reset, the insulating protective shell returns to the closed state to form insulation protection for the isolating switch knife switch.

[0007] In one embodiment of the present application, based on the aforementioned solution, the transmission mechanism includes an angle adjustment device, a U-shaped rod, a bending piece, and a connecting rod; the angle adjustment device is connected to the U-shaped rod and the second adjustment mechanism, the bending piece is provided at the end of the U-shaped rod, and the bending piece is detachably connected to the insulating protective shell; the connecting rod is connected to the U-shaped rod and the surface of the insulating protective shell;

[0008] When the insulating protective shell is converted from the original state to the opened state, the bending piece contacts the inner side of the insulating protective shell, and the bending piece moves outward to increase the angle of the U-shaped rod, so that the insulating protective shell is opened;

[0009] When the bending piece moves inward to reset, the angle of the U-shaped rod decreases, so that the insulating protective shell returns to a closed state, thereby forming insulating protection for the disconnector knife switch.

[0010] In one embodiment of the present application, based on the aforementioned scheme, the insulating protective shell includes a locking block and an engaging piece engaged with the locking block, and the locking block and the engaging piece are respectively arranged on the two side shells of the insulating protective shell. When the insulating protective shell is stretched open, the locking block is separated from the engaging piece, and when the insulating protective shell is restored to a closed state, the locking block is engaged with the engaging piece to lock the insulating protective shell.

[0011] In one embodiment of the present application, based on the aforementioned scheme, the angle adjustment device includes a knob, a gear and a pad block; the pad block is connected to the gear and the U-shaped rod; the knob is engaged with the second adjustment mechanism and is rotationally connected to the gear, and the direction of the U-shaped rod is adjusted by the knob.

[0012] In one embodiment of the present application, based on the aforementioned scheme, the second adjustment mechanism includes a rotating block and a first connecting rod; the rotating block is provided with a spiral groove, the knob is embedded in the spiral groove, and is rotatably connected to the gear; the rotating block is sleeved on one end of the first connecting rod, and the other end of the first connecting rod is connected to the first adjustment mechanism.

[0013] In one embodiment of the present application, based on the above solution, the first adjustment mechanism includes a rotatable device and a second connecting rod, and the rotatable device is fixedly connected to the first connecting rod and rotatably connected to the second connecting rod.

[0014] In one embodiment of the present application, based on the above solution, the rotatable device includes an adjustable block and a rotatable block, the rotatable block is fixedly connected to the first connecting rod and is rotatably connected to the adjustable block; the adjustable block is sleeved on the second connecting rod and is rotatably connected to the second connecting rod;

[0015] Wherein, the length of the first connecting rod is 1 meter to 3 meters, and the length of the second connecting rod is 1 meter to 3 meters.

[0016] The beneficial effects of the present application are: through the rotational connection between the first adjustment mechanism and the second adjustment mechanism, the direction of the transmission mechanism rotationally connected to the second adjustment mechanism is adjustable, and the second adjustment mechanism is rotatably connected to the transmission mechanism, so that the transmission mechanism can be adjusted in direction in multiple dimensions (or multiple degrees of freedom), and since the transmission mechanism is detachably connected to the insulating protective shell, the insulation protection direction and angle of the insulating protective shell can be adjusted.

[0017] Based on this, the operator can protect the isolating switch knife switch by holding the first adjustment mechanism and adjusting the direction and angle of the insulating protective shell to the appropriate position. When the insulating protective shell touches the silicone insulator of the isolating switch knife switch, the insulating protective shell is first stretched open by the silicone insulator to a certain space. At the same time, the transmission mechanism also stretches the insulating protective shell, so that the insulating protective shell is converted from the original state to the open state. When the silicone insulator completely enters the range of the insulating protective shell, the transmission mechanism will automatically reset, so that the insulating protective shell returns to the closed state, thereby forming insulation protection for the isolating switch knife switch.

[0018] When forming insulation protection, by wrapping the silicone insulator, the upper and lower blades of the isolating switch can be insulated and protected due to the presence of the insulating protective shell. Because if there is a conductor between the upper and lower blades, such as an animal touching the upper and lower blades at the same time, there will be a risk of short circuit, causing safety risks and unnecessary losses. Therefore, the insulation protection device of the present application does not require manual close-range insulation protection operations on the isolating switch blades, which can not only reduce the difficulty and safety risks of insulation protection operations, but also improve operational efficiency and provide good insulation protection for the isolating switch blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the following briefly describes the drawings required for describing the embodiments. Obviously, the drawings described are only part of the embodiments of this application, not all of them. Those skilled in the art can also derive other design solutions and drawings based on these drawings without inventive effort.

[0020] Figure 1 1 is an overall structural diagram of an insulating protective housing of an insulating protection device for an isolating switch according to an embodiment of the present application in a closed state;

[0021] Figure 2 1 is a structural diagram of an insulating protective housing of an insulating protection device for an isolating switch according to an embodiment of the present application in an open state;

[0022] Figure 3 Schematic diagram of an insulating protective housing and a transmission mechanism according to an embodiment of the present application;

[0023] Figure 4 is a schematic diagram of an angle adjustment device according to an embodiment of the present application;

[0024] Figure 5 is a schematic diagram of a second adjustment mechanism according to an embodiment of the present application;

[0025] Figure 6 is a schematic diagram of a first adjustment mechanism according to an embodiment of the present application;

[0026] Figure 7 This is another schematic diagram of the insulating protective housing and the transmission mechanism according to an embodiment of the present application.

[0027] Reference numerals

[0028] First adjusting mechanism 1, rotatable device 11, adjustable block 111, rotatable block 112, second connecting rod 12, second adjusting mechanism 2, rotating block 21, first connecting rod 22, spiral groove 23, insulating protective shell 3, locking block 31, fitting 32, shell 33, inner edge 34, semicircular groove 35, circular groove 36, transmission mechanism 4, angle adjustment device 41, knob 411, gear 412, pad block 413, U-shaped rod 42, bending piece 43, connecting rod 44, disconnector knife switch 5, silicone insulator 51, upper knife switch 52, lower knife switch 53. DETAILED DESCRIPTION

[0029] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0030] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, many specific details are provided so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps etc. can be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0031] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically separate entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or micro-controller node devices.

[0032] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.

[0033] It should be noted that the term "plurality" used in this document refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0034] The following is a detailed description of the implementation details of the technical solution of the embodiment of the present application:

[0035] According to one aspect of an embodiment of the present application, an insulation protection device for an isolating switch knife switch is provided. Figure 1 FIG1 is an overall structural diagram of an insulating protective housing 3 of an insulating protective device for an isolating switch according to an embodiment of the present application in an original state or a closed state (or reset state). Figure 2 This is a diagram showing the overall structure of the insulating protective housing 3 of the insulating protective device for the isolating switch knife switch in the open state, which is described in detail as follows:

[0036] The insulation protection device includes a first adjustment mechanism 1, a second adjustment mechanism 2, an insulation protection shell 3, and a transmission mechanism 4. The first adjustment mechanism 1 is rotatably connected to the second adjustment mechanism 2, the second adjustment mechanism 2 is rotatably connected to the transmission mechanism 4, and the transmission mechanism 4 is detachably connected to the insulation protection shell 3. The insulation protection shell 3 is used to enclose the silicone insulator 51 of the disconnector 5.

[0037] Among them, the original state of the insulating protective shell 3 is a closed state. When the insulating protective shell 3 is converted from the original state to the open state, the insulating protective shell 3 is stretched open by the transmission mechanism 4 to allow the silicone insulator 51 to enter the insulating protective shell 3. When the transmission mechanism 4 is reset, the insulating protective shell 3 returns to the closed state to form insulation protection for the isolating switch knife switch 5.

[0038] Specifically, the first adjusting mechanism 1 and the second adjusting mechanism 2 are rotatably connected, so that the direction of the transmission mechanism 4 rotatably connected to the second adjusting mechanism 2 is adjustable, and the second adjusting mechanism 2 is rotatably connected to the transmission mechanism 4, so that the transmission mechanism 4 can be adjusted in direction in multiple dimensions (or multiple degrees of freedom), and since the transmission mechanism 4 is detachably connected to the insulating protective shell 3, the insulation protection direction and angle of the insulating protective shell 3 can be adjusted.

[0039] Based on this, the operator can protect the isolating switch knife switch 5 by holding the first adjustment mechanism 1 and adjusting the direction and angle of the insulating protective shell 3 to the appropriate position. When the insulating protective shell 3 touches the silicone insulator 51 of the isolating switch knife switch 5, the insulating protective shell 3 is first stretched open by the silicone insulator 51 to a certain space. At the same time, the transmission mechanism 4 also stretches the insulating protective shell 3, so that the insulating protective shell 3 is converted from the original state to the open state. When the silicone insulator 51 completely enters the range of the insulating protective shell 3, the transmission mechanism 4 will automatically reset, so that the insulating protective shell 3 is restored to the closed state, thereby forming insulation protection for the isolating switch knife switch 5.

[0040] When forming insulation protection, by wrapping the silicone insulator 51, the upper knife switch 52 and the lower knife switch 53 of the isolating switch knife switch 5 can be insulated and protected due to the presence of the insulating protective shell 3. Because if there is a conductor between the upper knife switch 52 and the lower knife switch 53, such as an animal touching the upper knife switch and the lower knife switch at the same time, there will be a risk of short circuit, causing safety risks and unnecessary losses. Therefore, the insulation protection device of the present application does not require manual close-range insulation protection operations on the isolating switch knife switch 5, which can reduce the difficulty and safety risks of insulation protection operations, improve operating efficiency, and provide good insulation protection for the isolating switch knife switch 5.

[0041] In some embodiments, the transmission mechanism 4 includes an angle adjustment device 41, a U-shaped rod 42, a bending piece 43, and a connecting rod 44; the angle adjustment device 41 is connected to the U-shaped rod 42 and the second adjustment mechanism 2, the bending piece 43 is provided at the end of the U-shaped rod 42, and the bending piece 43 is detachably connected to the insulating protective shell 3; the connecting rod 44 is connected to the U-shaped rod 42 and the surface of the insulating protective shell 3;

[0042] When the insulating protective shell 3 is converted from the original state to the open state, the bending piece 43 contacts the inner side of the insulating protective shell 3, and the bending piece 43 moves outward to increase the angle of the U-shaped rod 43, so that the insulating protective shell 3 is opened;

[0043] When the bending piece 43 moves inward to reset, the angle of the U-shaped rod 42 decreases, so that the insulating protective shell 3 returns to a closed state, thereby forming insulating protection for the disconnector knife switch 5.

[0044] Specifically, the schematic diagram of the transmission mechanism 4 and the insulating protective shell 3 is as follows Figure 3 As shown, the angle (or opening) of the U-shaped rod 42 is increased by sliding the bending piece 43 along the inner side of the insulating protective shell 3, that is, moving outward. At this time, the angle between the two side shells of the insulating protective shell 3 is also increased, so that the insulating protective shell 3 is stretched open (that is, as shown in FIG. Figure 2 or Figure 7 As shown in FIG. 1 , when the angle between the two side shells 33 reaches a certain angle (e.g., an angle of 30 degrees or more), the disconnector 5 can enter the range formed by the insulating protective shell 3, that is, the silicone insulator 51 can enter the insulating protective shell 3. The connecting rod 44 is used to enable the transmission mechanism 4 to contact the insulating protective shell 3, preventing the risk of the insulating protective shell 3 falling.

[0045] Since both side shells 33 of the insulating protective shell 3 are provided with semicircular grooves 35 for resetting the bent piece 43, when the bent piece slides a certain distance along the inner edge 34 of the insulating protective shell and enters the semicircular groove 35, the bent piece 43 will slide inward, thereby reducing the angle of the U-shaped rod 42, so that the insulating protective shell 3 is restored to the closed state, that is, the transmission mechanism 4 is now reset. Figure 3 As shown, the two semicircular grooves 35 are closed and contacted to form a complete circular groove 36. At this time, the silicone insulator 51 has completely entered the insulating protective shell 3, thereby blocking the connection between the upper knife switch 52 and the lower knife switch 53 of the isolating switch knife switch 5, forming an insulating protection for the isolating switch knife switch 5.

[0046] In some embodiments, the insulating protective shell 3 includes a locking block 31 and an interlocking piece 32 engaged with the locking block. The locking block 31 and the interlocking piece 32 are respectively arranged on the two side shells 33 of the insulating protective shell 3. When the insulating protective shell 3 is stretched open, the locking block 31 is separated from the interlocking piece 32. When the insulating protective shell 3 is restored to a closed state, the locking block 31 is engaged with the interlocking piece 32 to lock the insulating protective shell 3.

[0047] Specifically, continue to refer to Figure 3 As shown, Figure 3 The locking block 31 and the insert 32 are also included. The locking block 31 and the insert 32 are respectively arranged on the shells 33 on both sides of the insulating protective shell 3. When the insulating protective shell 3 is opened, Figure 2 or Figure 7 As shown, the locking block 31 is separated from the insert 32. When the insulating protective housing 3 is restored to the closed state, the locking block 31 is inserted into the insert 32. Figure 1 or Figure 3 As shown, at this time, the two side shells 33 of the insulating protective shell 3 are locked, which can prevent the two side shells 33 from being stretched apart due to external force factors, such as animals, etc., and can maintain the stability of this state after the insulating protection is formed, and is not easily destroyed.

[0048] In some embodiments, the angle adjustment device 41 includes a knob 411, a gear 412 and a pad 413; the pad 413 is connected to the gear 412 and the U-shaped rod 42; the knob 411 is engaged with the second adjustment mechanism 2 and is rotatably connected to the gear 412, and the direction of the U-shaped rod 42 is adjusted by the knob 411.

[0049] Specifically, if Figure 4 As shown, Figure 4 This is a schematic diagram of the angle adjustment device 41, where a knob 411 is in contact with a gear 412, rotatably connected to adjust the angular direction of the U-shaped rod 42. A spacer 413 is connected to the gear 412 and the U-shaped rod 42. The knob 411 engages with the second adjustment mechanism 2, enabling the second adjustment mechanism 2 to adjust the direction of the angle adjustment device 41. Rotating the knob 411 also adjusts the direction of the U-shaped rod 42, and thus the direction of the insulating protective housing 3.

[0050] In some embodiments, the second adjustment mechanism 2 includes a rotating block 21 and a first connecting rod 22; the rotating block 21 is provided with a spiral groove 23, the knob 411 is embedded in the spiral groove 23, and is rotatably connected to the gear 412; the rotating block 21 is sleeved on one end of the first connecting rod 22, and the other end of the first connecting rod 22 is connected to the first adjustment mechanism 1.

[0051] Specifically, if Figure 5 As shown, Figure 5 This is a schematic diagram of the second adjustment mechanism 2, wherein a spiral groove 23 is provided within the rotating block 21 for receiving a knob 411. The knob 411 engages within the spiral groove 23 and is rotatably connected to the gear 412. The rotating block 21 is sleeved onto the first connecting rod 22, allowing the rotating block 21 to rotate to adjust the direction of the transmission mechanism 4.

[0052] In some embodiments, the first adjustment mechanism 1 includes a rotatable device 11 and a second connecting rod 12. The rotatable device 11 is fixedly connected to the first connecting rod 12 and is rotatably connected to the second connecting rod 22. The rotatable device 11 includes an adjustable block 111 and a rotatable block 112. The rotatable block 112 is fixedly connected to the first connecting rod 22 and is rotatably connected to the adjustable block 111. The adjustable block 111 is sleeved on the second connecting rod 12 and is rotatably connected to the second connecting rod 12.

[0053] The length of the first connecting rod 22 is 1 meter to 3 meters, and the length of the second connecting rod 12 is 1 meter to 3 meters.

[0054] Specifically, the rotatable device 11 includes an adjustable block 111 and a rotatable block 112. Figure 6 As shown, Figure 6 This is a schematic diagram of the first adjustment mechanism 1. The adjustable block 111 and the rotatable block 112 can rotate, and the adjustable block 111 and the second connecting rod 12 can also rotate. In this way, the angle and direction of the first connecting rod 12 can be adjusted from multiple dimensions, thereby adjusting the direction of the transmission mechanism 4 and the insulating protective shell 3. Among them, the length of the first connecting rod 22 and the length of the second connecting rod 12 can be arbitrarily set between 1 meter and 3 meters. The advantage of this is that the operator only needs to hold the second connecting rod 12 to perform insulation protection on the disconnector knife switch 5 in the air, without having to perform protection operations at close range. This improves the efficiency of the insulation protection operation and reduces the difficulty and safety risks of the operation.

[0055] In summary, based on the structure of the insulation protection device for the isolating switch knife switch, the present application has designed a new insulation protection operation method. After the operator adjusts the angle of the insulation protection device, that is, adjusts the angle and direction of the first adjustment mechanism 1, the second adjustment mechanism 2, the insulation protection shell 3 and the transmission mechanism 4 to the appropriate position and fixes them, the insulation protection device can be held on the ground to perform insulation protection operations. During the insulation protection operation, the insulation protection shell 3 will automatically open and close due to the transmission mechanism 4, so as to complete the wrapping (insulation protection) of the isolating switch knife switch 5. The present application has the technical effect of reducing the difficulty of insulation protection operations and safety risks, improving operation efficiency and providing good insulation protection for the isolating switch knife switch.

[0056] Furthermore, the above figures are merely illustrative of the processes included in the methods according to exemplary embodiments of the present application and are not intended to be limiting. It is readily understood that the processes illustrated in the above figures do not indicate or limit the temporal order of these processes. Furthermore, it is readily understood that these processes can be executed synchronously or asynchronously across multiple modules.

[0057] It should be understood that the present application is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be performed without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. An insulation protection device for an isolating switch, characterized in that: The insulation protection device includes a first adjustment mechanism, a second adjustment mechanism, an insulation protection shell, and a transmission mechanism. The first adjustment mechanism is rotatably connected to the second adjustment mechanism, the second adjustment mechanism is rotatably connected to the transmission mechanism, and the transmission mechanism is detachably connected to the insulation protection shell. The insulation protection shell is used to enclose the silicone insulator of the disconnector knife switch. In which, the original state of the insulating protective shell is a closed state. When the insulating protective shell is converted from the original state to the open state, the insulating protective shell is stretched open by the transmission mechanism to allow the silicone insulator to enter the insulating protective shell. When the transmission mechanism is reset, the insulating protective shell returns to the closed state to form insulation protection for the isolating switch knife switch.

2. The insulation protection device for the isolating switch according to claim 1, characterized in that: The transmission mechanism includes an angle adjustment device, a U-shaped rod, a bending piece, and a connecting rod; the angle adjustment device is connected to the U-shaped rod and the second adjustment mechanism, the bending piece is provided at the end of the U-shaped rod, and the bending piece is detachably connected to the insulating protective shell; the connecting rod is connected to the U-shaped rod and the surface of the insulating protective shell; When the insulating protective shell is converted from the original state to the opened state, the bending piece contacts the inner side of the insulating protective shell, and the bending piece moves outward to increase the angle of the U-shaped rod, so that the insulating protective shell is opened; When the bending piece moves inward to reset, the angle of the U-shaped rod decreases, so that the insulating protective shell returns to a closed state, thereby forming insulating protection for the disconnector knife switch.

3. The insulation protection device for the isolating switch according to claim 2, characterized in that: The insulating protective shell includes a locking block and an engaging piece engaged with the locking block. The locking block and the engaging piece are respectively arranged on the two side shells of the insulating protective shell. When the insulating protective shell is stretched open, the locking block is separated from the engaging piece. When the insulating protective shell is restored to a closed state, the locking block is engaged with the engaging piece to lock the insulating protective shell.

4. The insulation protection device for the isolating switch according to claim 2, characterized in that: The angle adjustment device includes a knob, a gear and a pad block; the pad block is connected to the gear and the U-shaped rod; the knob is engaged with the second adjustment mechanism and is rotationally connected to the gear, and the direction of the U-shaped rod is adjusted by the knob.

5. The insulation protection device for the isolating switch according to claim 4, characterized in that: The second adjustment mechanism includes a rotating block and a first connecting rod; the rotating block is provided with a spiral groove, the knob is embedded in the spiral groove, and is rotationally connected to the gear; the rotating block is sleeved on one end of the first connecting rod, and the other end of the first connecting rod is connected to the first adjustment mechanism.

6. The insulation protection device for the isolating switch according to claim 5, characterized in that: The first adjusting mechanism includes a rotatable device and a second connecting rod. The rotatable device is fixedly connected to the first connecting rod and is rotatably connected to the second connecting rod.

7. The insulation protection device for the isolating switch according to claim 6, characterized in that: The rotatable device includes an adjustable block and a rotatable block, wherein the rotatable block is fixedly connected to the first connecting rod and is rotatably connected to the adjustable block; the adjustable block is sleeved on the second connecting rod and is rotatably connected to the second connecting rod; Wherein, the length of the first connecting rod is 1 meter to 3 meters, and the length of the second connecting rod is 1 meter to 3 meters.

Images