Easily deployable and retractable cable trench cover opening and covering device

Abstract

The present invention discloses a cable well cover opening and covering device that can be easily deployed and retracted, which includes: a main frame; a lifting device that can be hoisted on the main frame; support legs, and the support legs include: movable support legs that can be unfolded and straightened or retracted to the bottom of the main frame; and auxiliary support legs that can be unfolded and straightened, can be height-adjusted, and can also be retracted to the bottom of the main frame; mantis legs that can be unfolded or retracted to the bottom of the main frame; wherein the lower part of each movable support leg is equipped with a first support wheel; the lower part of each auxiliary support leg is equipped with a second support wheel; wherein each mantis leg is provided with a jack; and an auxiliary wheel adjacent to the movable support leg is also provided on the main frame. The present invention can flexibly switch between various forms such as the storage state, the operation state, and the unfolded and movable state, is easy to store and unfold, is easy to move in a small range and a large range, and is also easy to directly push and move itself, saving effort and being convenient, with high flexibility and good usability, and can be widely promoted and applied.

Description

Technical Field

[0001] The present invention relates to the technical field of cable maintenance engineering equipment, and particularly relates to a cable well cover opening and covering device. Background Art

[0002] With the continuous development of power grid engineering construction, overhead lines in urban areas are gradually replaced by underground cables. As a dedicated laying channel for underground cables, cable trench covers are widely used in power grid projects. In order to facilitate the placement of cable routing pulleys during cable laying and provide sufficient space for maintenance workers, cable well covers are generally made square. Among them, ordinary concrete covers have become the main force of cable well covers due to their simple materials, low economic cost, and low manufacturing process requirements. However, they also have the disadvantages of large volume, heavy weight, and difficult to uncover / cover.

[0003] During cable line inspection and maintenance construction, due to the lack of special cable well cover opening tools, construction workers have to manually open and cover the well covers. Due to the limitations of the on-site construction site, the current method of lifting and positioning cable well covers generally relies on crowbars. Especially for cable covers with large specifications and sizes, multiple people are required to apply force together, which is time-consuming, laborious, and extremely inefficient. This method not only requires several workers to cooperate skillfully, but also causes damage to the edges and corners of the cover during the process of prying the cover, making it difficult to reset. It has high requirements for the physical fitness and skill level of construction. If the flipping cooperation is insufficient, it is very easy to cause scratches, bruises, and strains to the workers, and even cause the well cover to fall into the cable well or trench and damage the cable, resulting in major accidents such as short-circuit power outages, affecting personal and equipment safety. This problem is particularly prominent for heavy covers over 150 kg.

[0004] In response to the problem of cable well cover opening and covering operations, many units have conducted useful exploratory research. State Grid Zhejiang Changshan County Power Supply Company developed a simple cable well cover opening device, which uses a combination of an L-shaped bracket and a jack to open the well cover. Ningbo Power Supply Company of State Grid Zhejiang Electric Power Company developed a new type of cable well cover lifting tool, which uses an electric hydraulic device to lift the well cover. Neither of these two devices can move and cannot achieve the relocation and installation of the well cover. State Grid Zhejiang Jiashan County Power Supply Co., Ltd. developed a cable well cover lifting cart, designed an anti-disengagement lifting rod, and used a handcart as a lever to lift the well cover. This device has a certain function of moving the well cover, but it is difficult to operate relying on manpower.

[0005] Generally speaking, the existing research is all some auxiliary tools, which can help cable well cover opening and covering operations to a certain extent in a very limited way, but cannot effectively solve the various practical difficulties faced by cable well cover opening and covering operations, especially cannot balance storage and convenient movement. Summary of the Invention

[0006] Objective of the Invention: In order to overcome the deficiencies existing in the prior art, the present invention provides an easily deployable and retractable cable well cover opening and covering device.

[0007] Technical Solution: The present invention provides an easily deployable and retractable cable well cover opening and covering device, which includes:

[0008] A main frame;

[0009] A hoisting device that can be hoisted on the main frame;

[0010] Support legs, and the support legs include: movable support legs that can be deployed and straightened or retracted to the bottom of the main frame; and auxiliary support legs that can be deployed and straightened, can be height-adjusted, and can also be retracted to the bottom of the main frame;

[0011] Mantis legs that can be deployed or retracted to the bottom of the main frame;

[0012] Wherein, a first support wheel is installed at the lower part of each movable support leg; a second support wheel is installed at the lower part of each auxiliary support leg;

[0013] Wherein, a jack is provided on each mantis leg;

[0014] An auxiliary wheel adjacent to the movable support leg is further provided on the main frame.

[0015] Preferably, the movable support legs, the auxiliary support legs, and the mantis legs are all hinged to the main frame.

[0016] Preferably, the hoisting device includes a hoisting device body and a hook; wherein the hook is hung on the hoisting device body.

[0017] Preferably, the main frame includes a machine frame and a cross beam located inside the machine frame and slidably connected thereto;

[0018] Wherein, an X-axis guide rail is provided on the machine frame, and a Y-axis guide rail is provided on the cross beam;

[0019] A winch that can move on the cross beam is further provided on the cross beam.

[0020] Preferably, an X-axis moving motor is further fixedly provided on the cross beam.

[0021] Preferably, a Y-axis moving motor is further fixedly provided on the winch.

[0022] Preferably, the winch reciprocates on the cross beam through a gear-rack drive.

[0023] Preferably, the cross beam reciprocates on the machine frame by rolling in a slot through rollers.

[0024] Further preferably, each mobile support leg includes a mobile support leg body, a first air spring, a folding link, and a first support wheel installed at the lower part of the mobile support leg body;

[0025] One end of the folding link is hinged to the main frame, and the other end is hinged to the mobile support leg body;

[0026] One end of the first air spring is hinged to the main frame, and the other end is hinged to the folding link.

[0027] Further preferably, it further includes a plurality of hollow brackets fixedly installed on the main frame for installing each support leg;

[0028] Each hollow bracket is provided with a rotation center hole corresponding to the rotation center of the support leg rotating relative to the main frame; the hollow bracket for installing the mobile support leg is further provided with an arc-shaped limiting groove centered on its rotation center hole;

[0029] Each mobile support leg further includes a bumper rod and an auxiliary transmission link;

[0030] The bumper rod includes a bumper rod center hole, and a first rod body and a second rod body extending outward relative to the bumper rod center hole; the included angle between the first rod body and the second rod body is an obtuse angle;

[0031] The bumper rod is aligned and pin-connected to the rotation center corresponding to the rotation center hole on the corresponding hollow bracket through the bumper rod center hole on it; an auxiliary roller is provided at the outer end of the first rod body of the bumper rod; the outer ends of the second rod body of the bumper rod and one end of the auxiliary transmission link are jointly pin-connected to the arc-shaped limiting groove on the corresponding hollow bracket;

[0032] The other end of the auxiliary transmission link is hinged to the corresponding folding link.

[0033] Preferably, the hollow bracket is a Y-shaped hollow bracket.

[0034] As a preference, each mobile support leg further includes a leg guard fixed on the mobile support leg body.

[0035] As a preference, an auxiliary roller is further provided at the lower end of the leg guard.

[0036] Preferably, each auxiliary wheel is installed on the outer side / outer edge of the corresponding hollow bracket of the mobile support leg through a bearing.

[0037] Further preferably, each auxiliary support leg includes an auxiliary support leg body, a second limiting air spring, and a second support wheel installed at the lower part of the auxiliary support leg body;

[0038] One end of the second limiting air spring is hinged to the main frame, and the other end is hinged to the auxiliary support leg body.

[0039] Preferably, the auxiliary support leg body is an auxiliary support leg body with adjustable height.

[0040] More preferably, each mantis leg includes a mantis leg body;

[0041] The end of the mantis leg body is rotatably connected to the corresponding jack;

[0042] The jack is a jack with a lifting mechanism; the lifting mechanism is a lifting mechanism with a self-locking function.

[0043] More preferably, the upper part of the mantis leg body and the corresponding jack are rotatably sleeved together and fixed by a detachable movable pin;

[0044] The end of the mantis leg body is also provided with a first worm, and the end of the first worm is fixedly connected with a worm handwheel with a self-locking function; the upper part of the jack is provided with a first worm gear meshing with the first worm for transmission.

[0045] Beneficial effects: The easy-to-expand and easy-to-receive cable well cover opening and covering device provided by the present invention, on the one hand, provides a cable well cover opening and covering device in the form of a gantry crane. The mobile small gantry hanger is arranged above the well cover to be operated, and the support can be adjusted, taking into account both stability and flexibility, which is convenient for the operation of opening and covering the well cover; on the other hand, based on the structural configuration of the easy-to-expand and easy-to-receive cable well cover opening and covering device provided by the present invention, it can realize small-range and large-range movement of the well cover to different degrees / ranges according to the actual application scenario, which is flexible and ingenious, greatly improving the convenience of the cable well cover opening and covering operation and being able to better adapt to more different actual application scenarios; thirdly, the structure of the present invention is reasonable and the construction is ingenious. The cable well cover opening and covering device can be directly pushed to a transport vehicle (such as a power engineering vehicle), and it can be smoothly folded and stored on the transport platform by simply pushing. Conversely, it can also be unfolded on the ground by pulling back, skillfully realizing the easy / convenient loading and unloading of the device onto and off the engineering vehicle, and at the same time realizing the folding and storage and the unfolding on the ground of the device on the basis of having a load-bearing support, which is labor-saving, convenient and easy to operate, and has extremely high usability; fourthly, based on the structural configuration of the easy-to-expand and easy-to-receive cable well cover opening and covering device provided by the present invention, it can be directly pushed and moved to different operation locations. It is stable during operation and convenient during movement, and does not require the cooperation of multiple staff, effectively avoiding problems such as the artificial operation of the well cover falling and being damaged and the staff being scratched, bruised, or strained, greatly improving the safety of equipment, operation, and personnel, and having extremely high versatility and flexibility.

[0046] Generally speaking, based on the structure and configuration provided by the present invention, it is possible to flexibly realize the flexible switching / conversion of the cable manhole cover lifting and covering device among various forms such as the storage state, the operation state, and the unfolded and mobile state. It is easy to store and unfold, easy to move within a small range and move a hoisted object such as a cable manhole cover over a large range. It is also easy to directly push and move itself, saving effort and being convenient, with high flexibility and good usability, and can be widely promoted and applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 A schematic structural diagram of an easily unfoldable and foldable cable manhole cover lifting and covering device provided for the embodiment;

[0048] Figure 2 A schematic structural diagram of the easily unfoldable and foldable cable manhole cover lifting and covering device provided for the embodiment in the storage state;

[0049] Figure 3 For Figure 2 A partial enlarged view of part A in

[0050] Figure 4 A schematic structural diagram of the easily unfoldable and foldable cable manhole cover lifting and covering device provided for the embodiment in one of the unfolded states (i.e., the unfolded and mobile state);

[0051] Figure 5 A schematic structural diagram of the easily unfoldable and foldable cable manhole cover lifting and covering device provided for the embodiment in one of the operation states (and moving within a small range);

[0052] Figure 6 A schematic structural diagram of the easily unfoldable and foldable cable manhole cover lifting and covering device provided for the embodiment during one of the large-range movements;

[0053] Figure 7 A schematic structural diagram of the easily unfoldable and foldable cable manhole cover lifting and covering device provided for the embodiment with the lifting device removed;

[0054] Figure 8 For Figure 7 A partial enlarged view of part C in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0055] The following further describes the present invention in detail in conjunction with the embodiments and the drawings. The following embodiments do not limit the present invention.

[0056] An easily unfoldable and foldable cable manhole cover lifting and covering device provided in this embodiment, as shown in Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , includes:

[0057] Main frame 9;

[0058] Lifting device 17 that can be hoisted on the main frame 9;

[0059] Support legs, the support legs include: Movable support legs 3 that can be deployed and straightened or retracted to the bottom of the main frame 9; and Auxiliary support legs 20 that can be deployed and straightened, can be height-adjusted, and can also be retracted to the bottom of the main frame 9;

[0060] Mantis legs 14 that can be deployed or retracted to the bottom of the main frame 9;

[0061] Among them, a first support wheel 1 is installed at the lower part of each movable support leg 3; a second support wheel 21 is installed at the lower part of each auxiliary support leg 20;

[0062] Among them, a jack 16 is provided on each mantis leg 14;

[0063] An auxiliary wheel 4 adjacent to the movable support leg 3 is also provided on the main frame 9.

[0064] In this embodiment, each of the movable support legs 3, each of the auxiliary support legs 20, and each of the mantis legs 14 are hinged to the main frame 9.

[0065] In this embodiment, the lifting device 17 includes a lifting device body and a hook 18; among them, the hook 18 is hung on the lifting device body.

[0066] In this embodiment, as Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 shown, the main frame 9 includes a frame 13, and a cross beam 11 located inside the frame 13 and slidably connected thereto; among them, an X-axis guide rail is provided on the frame 13, and a Y-axis guide rail 12 is provided on the cross beam 11; a winch 10 that can move on the cross beam 11 is also provided on the cross beam 11. The above-mentioned lifting device 17 can be hung on the hook of the winch 10. Among them, the frame 13 is a frame / main frame frame containing an X-axis guide rail.

[0067] In this embodiment, as Figure 1 and Figure 4 shown, an X-axis moving motor 6 is also fixedly provided on the cross beam 11; a Y-axis moving motor 8 is also fixedly provided on the winch 10. In this embodiment, specifically, the winch 10 reciprocates on the cross beam 11 through gear-rack transmission; among them, the cross beam 11 reciprocates on the frame 13 by rolling in the slot through rollers.

[0068] In this embodiment, as Figure 1 , Figure 2 , Figure 4 ,Figure 5 , Figure 6 and Figure 7 As shown in Figure 5 , Figure 6 , and Figure 7 , specifically, each mobile support leg 3 includes a mobile support leg body, a first air spring 5, a folding link 22, and a first support wheel 1 installed at the lower part of the mobile support leg body. One end of the folding link 22 is hinged to the bottom of the main frame 9, and the other end is hinged to the side wall of the mobile support leg body. One end of the first air spring 5 is hinged to the bottom of the main frame 9, and the other end is hinged to the folding link 22. In some preferred embodiments, the other end of the first air spring 5 is hinged to the folding link 22. Specifically, in this embodiment, the other end of the first air spring 5 is hinged to a position of the folding link 22 adjacent to the folding part.

[0069] In this embodiment, as shown in Figures 1 to 7 Figures 1 to 7 , it further includes a plurality of hollow brackets 23 fixedly installed on the main frame 9 for installing each support leg. Each mobile support leg 3 and each auxiliary support leg 20 are rotatably foldable / rotatably foldablely installed on the main frame 9 through the corresponding hollow brackets 23; that is to say, each mobile support leg 3 and each auxiliary support leg 20 are hinged to the main frame 9 through the rotation center holes on the corresponding hollow brackets 23, and rotate and fold / rotate and fold relative to the main frame 9 and the hollow brackets 23 with the rotation center corresponding to the rotation center holes.

[0070] In this embodiment, as shown in Figure 8 Figure 8 , specifically, each hollow bracket 23 is provided with a rotation center hole 230 corresponding to the rotation center of the corresponding support leg rotating relative to the main frame 9; the hollow bracket 23 for installing the mobile support leg 3 is further provided with an arc-shaped limit groove 231 centered on its rotation center hole; of course, it can also be said that each hollow bracket 23 is provided with a rotation center hole 230 corresponding to the rotation and folding / rotation and folding when the corresponding support leg rotates and is received at the bottom of the main frame 9.

[0071] In this embodiment, in combination with Figure 7 and Figure 8As can be seen, each mobile support leg 3 further includes a collision rod 7 and an auxiliary transmission connecting rod 24; the collision rod 7 includes a collision rod central hole 70, and a first rod body 71 and a second rod body 72 extending outward relative to the collision rod central hole 70; the collision rod 7 is pivotally connected to the corresponding rotation center of the rotation center hole position through the collision rod central hole 70 thereon and the alignment clearance of the rotation center hole position on the corresponding hollow bracket 23, that is to say: the collision rod 7 is rotatably connected to the corresponding rotation center of the rotation center hole position through the collision rod central hole 70 thereon and the alignment clearance of the rotation center hole position on the corresponding hollow bracket 23 by means of a bearing or a cotter; the outer end of the second rod body 72 of the collision rod 7 and one end of the auxiliary transmission connecting rod 24 are jointly pivotally connected to the arc-shaped limit groove 231 on the corresponding hollow bracket 23; the other end of the auxiliary transmission connecting rod 24 is hinged to the corresponding folding connecting rod 22.

[0072] In some preferred embodiments, the included angle between the first rod body 71 and the second rod body 72 is an obtuse angle for better force transmission.

[0073] In some preferred embodiments, specifically, as Figure 1 , Figure 2 , Figure 7 and Figure 8 shown, an auxiliary roller is further provided at the outer end of the first rod body 71 of the collision rod 7. This structural configuration not only helps to buffer the impact, making the folding and storage smoother and more natural, but also plays a role of rolling assistance and force support during the folding and storage process of the support leg, pushing the whole of it and the cable well cover opening and closing device forward on the transport platform of the transport vehicle (such as the tipping platform of an engineering vehicle).

[0074] Specifically in this embodiment, as Figure 1 and Figure 2 shown, each mobile support leg 3 further includes a leg guard plate 2 fixed on the mobile support leg body. This structural configuration helps to buffer the impact and extend the service life of the support leg. In some preferred embodiments, as Figure 1 and Figure 2 shown, an auxiliary roller is further provided at the lower end of the leg guard plate 2. This structural configuration plays a role of rolling assistance and force support during the folding and storage process of the support leg, pushing the whole of it and the cable well cover opening and closing device forward on the transport platform of the transport vehicle (such as the tipping platform of an engineering vehicle).

[0075] In this embodiment, the hollow bracket 23 is a Y-shaped hollow bracket. In some preferred embodiments, some or all of the Y-shaped hollow brackets further extend outward with extension parts for installing other components such as auxiliary wheels 4. In this embodiment, in combination with Figure 7 and Figure 8As can be seen, on each hollow bracket 23 for installing the movable support leg 3, there is an extension for installing other components such as the auxiliary wheel 4 extending outward.

[0076] Each of the above-mentioned auxiliary wheels 4 is installed on the outer side / outer edge of the hollow bracket 23 corresponding to the movable support leg 3 through a bearing. That is to say, each auxiliary wheel 4 is installed on the extension of the hollow bracket 23 corresponding to the movable support leg 3 through a bearing.

[0077] In this embodiment, specifically as Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 shown, each auxiliary support leg 20 includes an auxiliary support leg body, a second limit gas spring 19, and a second support wheel 21 installed at the lower part of the auxiliary support leg body;

[0078] One end of the second limit gas spring 19 is hinged to the bottom of the main frame 9, and the other end is hinged to the side wall of the auxiliary support leg body. The auxiliary support leg body is an auxiliary support leg body that can be height-adjusted.

[0079] In this embodiment, as Figures 1 to 7 shown, each praying mantis leg 14 includes a praying mantis leg body; the end of the praying mantis leg body is rotatably connected to the corresponding jack 16; the jack 16 is a jack with a lifting mechanism 15; the lifting mechanism 15 is a lifting mechanism with a self-locking function.

[0080] In some embodiments, the praying mantis leg body is hinged to the corresponding jack 16.

[0081] In this embodiment, the praying mantis leg body and the corresponding jack 16 are relatively rotated by a certain angle through a worm and worm gear and then reinforced by a pin. Specifically, the upper part of the praying mantis leg body and the corresponding jack 16 are rotatably sleeved together and fixed by a detachable movable pin (not shown in the figure).

[0082] In this embodiment, specifically as Figure 2 and Figure 3 shown, a first worm 351 that can rotate relative to it is horizontally provided at the end of the praying mantis leg body, and a worm handwheel 350 with a self-locking function is fixedly connected to the end of the first worm 351; a first worm gear 352 meshing with the first worm 351 is provided at the upper part of the jack 16. In this structural configuration, pull out the movable pin, rotate the worm handwheel 350, through the relative transmission of the first worm gear 352 and the first worm 351, make the jack rotate relative to the praying mantis leg body to the required angle, and then further insert the movable pin back to strengthen the fixation.

[0083] Taking the above embodiment as an example, the working principle / working process of the easy-to-unfold and easy-to-store cable well cover opening and covering device provided in this embodiment is as follows:

[0084] When the cable well cover opening and covering device in the stored state on the transport vehicle needs to be unfolded and moved, the unfolding steps include:

[0085] A1) Gradually pull out the cable well cover opening and covering device from the transport vehicle starting from the side corresponding to the praying mantis legs 14. When all the auxiliary support legs 20 are off the ground, open the second limit gas spring 19 through the pull wire switch, and the auxiliary support legs 20 straighten, and then adjust the height of the auxiliary support legs 20 so that the second support wheels 21 on the auxiliary support legs 20 touch the ground;

[0086] A2) Then continue to pull out. When the moving support legs 3 are all off the ground and the auxiliary wheels 4 are still resting on the transport vehicle, open the first gas spring 5 and cooperate with the folding connecting rod 22 to straighten the moving support legs 3, and cooperate with pulling out to make the first support wheels 1 on the moving support legs 3 touch the ground, and the cable well cover opening and covering device can be pulled out as a whole and in the unfolded state;

[0087] When the cable well cover opening and covering device in the unfolded state needs to perform a lifting operation, hang the lifting device 17 (wherein: the lifting device 17 is hung on the hook of the winch 10), and move and / or rotate the winch 10 through the motor and guide rails (X-axis moving motor 6 and Y-axis moving motor 8, and X-axis guide rail and Y-axis guide rail 12), so as to indirectly move and / or rotate the lifting device 17 to locate the manhole cover hole position (that is: drive the winch 10 to move in the frame 13 of the main frame 9 through the X-axis moving motor 6 and Y-axis moving motor 8, and the X-axis guide rail and Y-axis guide rail 12, so as to indirectly move and / or rotate the lifting device 17 in the XY plane to locate the manhole cover hole position), and the lifting operation steps include:

[0088] C1) Move the cable well cover opening and covering device to the lifting work position, rotate the praying mantis legs 14 to make them in a V shape, and then lower the jack 16 vertically, and adjust the lifting mechanism 15 of the jack 16 so that the bottom flat plate of the jack touches the ground;

[0089] C2) Close the second limit gas spring 19 through the pull wire switch, so that the auxiliary support legs 20 are automatically retracted to the bottom of the main frame 9, so that the cable well cover opening and covering device is in the working state;

[0090] C3) Perform the lifting operation of the manhole cover.

[0091] When the cable well cover opening and covering device in the working state needs to be switched to the unfolded state (also known as the unfolded moving state), the steps include:

[0092] B11) Remove the lifting device 17;

[0093] B12) Open the second limit gas spring 19 through the pull wire switch, straighten the auxiliary support leg 20, adjust the height of the auxiliary support leg 20 so that the auxiliary support leg 20 is of the same length as the movable support leg 3, and make the second support wheel 21 on the auxiliary support leg 20 touch the ground;

[0094] B13) Retract the jack through the lifting mechanism 15 on the jack 16, and rotate the praying mantis leg 14 and the jack 16 to fold and store them at the bottom of the main frame 9;

[0095] When the cable well cover opening and covering device in the deployed state (which can also be called the deployed moving state) needs to be stored, the steps include:

[0096] B21) Push the cable well cover opening and covering device to a transport vehicle (such as a power engineering vehicle) and make the movable support leg (3) first touch / impact the transport vehicle platform (such as the tipping platform of the engineering vehicle). Due to the impact force, the movable support leg 3 automatically retracts to the bottom of the main frame 9; it can also be said that: B21) Push the cable well cover opening and covering device to a transport vehicle (such as a power engineering vehicle) and make the movable support leg 3 first touch / impact the transport vehicle platform (such as the tipping platform of the engineering vehicle). Under the action of the impact force, the first gas spring 5 closes and pulls the folding link 22 to fold, so that the movable support leg 3 automatically retracts to the bottom of the main frame 9; further, it can also be: B21) Push the cable well cover opening and covering device to a transport vehicle (such as a power engineering vehicle) and make the bumper rod 7 on the movable support leg 3 first touch / impact the transport vehicle platform (such as the tipping platform of the engineering vehicle). Under the action of the impact force, while the bumper rod 7 drives the auxiliary transmission link 24 to rotate around the rotation center in the arc-shaped limit groove 231, the first gas spring 5 closes, and the first gas spring 5 and the auxiliary transmission link 24 jointly pull the folding link 22 to fold, so that the movable support leg 3 automatically retracts to the bottom of the main frame 9;

[0097] B22) Continue to push the cable well cover opening and covering device. The auxiliary wheel 4 rolls forward under the force on the transport platform of the transport vehicle, so that the center of gravity of the cable well cover opening and covering device continuously moves forward. After its center of gravity moves to the transport platform, then close the second limit gas spring 19 through the pull wire switch, so that the auxiliary support leg 20 automatically retracts to the bottom of the main frame 9; with continuous pushing, the cable well cover opening and covering device can be loaded onto the vehicle as a whole and be in the stored state.

[0098] When small-range movement is required, the steps include:

[0099] D1) Before the cable well cover lifting device in the working state starts the lifting operation (preparing for lifting) or needs to move a small distance during the lifting operation (moving the lifting device 17 a small distance, such as moving the positioning manhole cover hole position a small distance, or moving the lifted manhole cover a small distance), the winch 10 is moved and / or rotated through the motor and guide rails (X-axis moving motor 6 and Y-axis moving motor 8, and X-axis guide rail and Y-axis guide rail 12), so as to indirectly move and / or rotate the lifting device 17, and obtain a small-distance movement of the lifting device 17 and / or the lifted manhole cover within the bottom space of the main frame 9 of the cable well cover lifting and covering device;

[0100] When a large-distance movement is required, the steps include:

[0101] E1) When the cable well cover lifting and covering device in the working state needs to move a large distance before the lifting operation (preparing for lifting) or during the lifting operation (moving the lifting device 17 a large distance, such as moving the positioning manhole cover hole position a large distance, or moving the lifted manhole cover a large distance), first, the jack is retracted through the lifting mechanism 15 on the jack 16, and the praying mantis legs 14 and the jack 16 are rotated and folded and stored at the bottom of the main frame 9;

[0102] E2) The second limit gas spring 19 is opened through the pull wire switch, the auxiliary support leg 20 is straightened, the height of the auxiliary support leg 20 is adjusted so that the auxiliary support leg 20 is equal in length to the moving support leg 3, the second support wheel 21 on the auxiliary support leg 20 touches the ground, and the cable well cover lifting and covering device is pushed to move as a whole, obtaining a large-distance movement of the lifting device 17 and / or the lifted manhole cover.

[0103] In this embodiment, the cable well cover lifting and covering device adopts the method of folding and storing the support legs on the same side, namely, the moving support leg 3, the auxiliary support leg 20 and the praying mantis legs 14 for auxiliary support. During lifting, the span direction of the equipment is the width direction of the manhole cover, which greatly reduces the external dimension of the lifting and covering device.

[0104] At the same time, for the positioning of the manhole cover hole position before lifting, the X-axis moving motor 6 and the Y-axis moving motor 8 are used for positioning, which is very convenient, efficient and accurate; after lifting, if a large-distance movement is required, the praying mantis legs 14 can be retracted, the auxiliary support legs 20 can be opened, and the cable well cover lifting and covering device can be moved as a whole to achieve a large-distance rough adjustment; if a small-distance movement (that is, a small-distance movement) is required, the X-axis moving motor 6 and the Y-axis moving motor 8 can be used to move to achieve a small-distance fine adjustment.

[0105] The first support wheel described in the text can also be called the moving support wheel. The second support wheel described in the text can also be called the auxiliary support wheel. The " / " described in the text means "or". The first worm gear described in the text can also be called the rotation direction worm gear. The first worm described in the text can also be called the rotation direction worm.

[0106] The cable well cover opening and covering device described in the text can also be called a cable manhole cover opening and covering device. The retractable type described in the text can also be called the easy-to-expand and easy-to-retract type. The unfolded state described in the text can also be called the unfolded moving state.

[0107] What the present invention protects are the shape, structure and configuration of the provided easy-to-expand and easy-to-retract cable well cover opening and covering device, and the unfolding and retracting working method (which can also be called the unfolding and retracting method or working method) of the provided cable manhole cover opening and covering device. The above embodiments do not constitute a limitation to the present invention. Various changes and modifications made by relevant staff within the scope not deviating from the technical idea of the present invention all fall within the protection scope of the present invention.

Claims

1. An easy-to-open-and-close device for the cover of a cable well that can be easily unfolded and folded, characterized in that, Comprising: Main frame (9); Lifting device (17) that can be hoisted on the main frame (9); Support legs, the support legs comprising: Movable support legs (3) that can be deployed and straightened or retracted to the bottom of the main frame (9); And auxiliary support legs (20) that can be deployed and straightened, can be height-adjusted, and can also be retracted to the bottom of the main frame (9); Mantis legs (14) that can be deployed or retracted to the bottom of the main frame (9); Wherein a first support wheel (1) is installed at the lower part of each movable support leg (3); a second support wheel (21) is installed at the lower part of each auxiliary support leg (20); Wherein a jack (16) is provided on each mantis leg (14); An auxiliary wheel (4) adjacent to the movable support leg (3) is further provided on the main frame (9); The main frame (9) includes a frame (13), and a cross beam (11) located inside the frame (13) and slidably connected thereto; Wherein an X-axis guide rail is provided on the frame (13), and a Y-axis guide rail (12) is provided on the cross beam (11); A winch (10) that can move on the cross beam (11) is further provided on the cross beam (11); Each movable support leg (3) includes a movable support leg body, a first air spring (5), a folding link (22), and a first support wheel (1) installed at the lower part of the movable support leg body; Wherein one end of the folding link (22) is hinged to the main frame (9), and the other end is hinged to the movable support leg body; Wherein one end of the first air spring (5) is hinged to the main frame (9), and the other end is hinged to the folding link (22); It further includes a plurality of hollow brackets (23) fixedly installed on the main frame (9) for installing each support leg; A rotation center hole position (230) corresponding to the rotation center of the support leg relative to the main frame (9) is provided on each hollow bracket (23); an arc-shaped limit groove (231) centered on its rotation center hole position is further provided on the hollow bracket (23) for installing the movable support leg (3); Each movable support leg (3) further includes a bumper rod (7) and an auxiliary transmission link (24); The bumper rod (7) includes a bumper rod center hole (70), and a first rod body (71) and a second rod body (72) extending outward relative to the bumper rod center hole (70); the included angle between the first rod body (71) and the second rod body (72) is an obtuse angle; The bumper rod (7) is pin-connected with a clearance in the rotation center hole position corresponding to the rotation center of the hollow bracket (23) through the bumper rod center hole (70) on it; an auxiliary roller is provided at the outer end of the first rod body (71) of the bumper rod (7); the outer ends of the second rod body (72) of the bumper rod (7) and one end of the auxiliary transmission link (24) are jointly pin-connected to the arc-shaped limit groove (231) on the corresponding hollow bracket (23); The other end of the auxiliary transmission link (24) is hinged to the corresponding folding link (22); Each auxiliary support leg (20) includes an auxiliary support leg body, a second limit air spring (19), and a second support wheel (21) installed at the lower part of the auxiliary support leg body; One end of the second limiting gas spring (19) is hinged to the main frame (9), and the other end is hinged to the auxiliary support leg body; The auxiliary support leg body is an auxiliary support leg body that can be adjusted in height.

2. The easy-to-expand and easy-to-receive cable well cover opening and covering device according to claim 1, characterized in that: Among them, the movable support leg (3), the auxiliary support leg (20) and the praying mantis leg (14) are all hinged to the main frame (9); and / or The hoisting device (17) includes a hoisting device body and a hook (18); wherein the hook (18) is hung on the hoisting device body.

3. The quick-opening and quick-closing device for the cable well cover according to claim 1, characterized in that: An X-axis moving motor (6) is also fixedly provided on the cross beam (11); and / or A Y-axis moving motor (8) is also fixedly provided on the winch (10); and / or The winch (10) reciprocates on the cross beam (11) through a gear-rack drive; and / or The cross beam (11) reciprocates on the machine frame (13) by rolling in the notch through rollers.

4. The easily deployable and retractable cable well cover opening and covering device according to claim 1, characterized in that: The hollow bracket (23) is a Y-shaped hollow bracket; and / or Each movable support leg (3) further includes a leg guard plate (2) fixed to the movable support leg body; and / or An auxiliary roller is further provided at the lower end of the leg guard plate (2); Each auxiliary wheel (4) is installed on the outer side / outer edge of the hollow bracket (23) corresponding to the movable support leg (3) through a bearing.

5. The quick-opening and quick-closing device for the cable well cover according to claim 1, characterized in that: Each praying mantis leg (14) includes a praying mantis leg body; The end of the praying mantis leg body is rotatably connected to the corresponding jack (16); The jack (16) is a jack with a lifting mechanism (15); the lifting mechanism (15) is a lifting mechanism with a self-locking function.

6. The easy-to-open and close device for the cable well cover of the expandable and retractable type according to claim 5, characterized in that: The upper part of the praying mantis leg body and the corresponding jack (16) are rotatably sleeved together and fixed by a detachable movable pin; A first worm (351) is further provided at the end of the praying mantis leg body, and a worm handwheel (350) with a self-locking function is fixedly connected to the end of the first worm (351); a first worm gear (352) meshing with the first worm (351) is provided at the upper part of the jack (16).

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