A method for extending and retracting a cable manhole cover opening and closing device

Abstract

This invention discloses a method for deploying and retracting a cable manhole cover opening device, comprising an unfolding step, a lifting step, and a storage step. The storage step includes: switching the cable manhole cover opening device from its operational state to its unfolded state; and storing the unfolded device. This method allows the cable manhole cover opening device to be directly pushed onto a transport vehicle and cleverly folded and stored on the transport platform. Conversely, it can also be pulled to unfold the folded device from the transport platform. This method cleverly achieves convenient loading and unloading of the device from the transport vehicle while simultaneously folding and unfolding it, saving effort, being convenient, and easy to operate, thus exhibiting high usability.

Description

Technical Field

[0001] This invention relates to the field of cable maintenance engineering equipment technology, specifically to a working method of a cable manhole cover opening and closing device. Background Technology

[0002] With the continuous development of power grid construction, overhead lines in urban areas are gradually being replaced by underground cables. Cable corridors serve as dedicated channels for laying underground cables, and cable trench covers are widely used in power grid projects. To facilitate the placement of cable laying pulleys during cable laying and to provide sufficient space for maintenance personnel, cable manhole covers are generally made in a square shape. Ordinary concrete covers have become the main type of cable manhole cover due to their simple materials, low economic cost, and low manufacturing process requirements. However, they also have disadvantages such as large size, heavy weight, and difficulty in opening / closing.

[0003] During cable line inspection and maintenance, due to the lack of specialized tools for opening cable manhole covers, workers must manually open and close them. Due to site limitations, the current method of lifting and positioning cable manhole covers generally relies on pry bars. This is especially problematic for larger covers, requiring multiple workers to apply force, which is time-consuming, labor-intensive, and extremely inefficient. This method not only demands skilled coordination from several workers but also risks damaging the edges and corners of the cover during prying, making it difficult to reposition. It demands a high level of physical fitness and skill from the workers. Insufficient coordination during prying can easily lead to scratches, bumps, and sprains on workers, or even cause the cover to fall into the cable manhole or trench, damaging cables and causing short circuits and power outages, jeopardizing personal and equipment safety. This problem is particularly pronounced with heavy covers weighing over 150 kg.

[0004] Several organizations have conducted beneficial exploratory research to address the challenges of opening and closing cable manhole covers. The State Grid Changshan County Power Supply Company in Zhejiang Province developed a simple cable manhole cover opening device, using a combination of an L-shaped bracket and a jack to open the cover. The State Grid Zhejiang Provincial Electric Power Company Ningbo Power Supply Company developed a new type of cable manhole cover lifting tool, utilizing an electro-hydraulic device to lift the cover. However, neither of these devices can move the cover, thus hindering its relocation and installation. The State Grid Jiashan County Power Supply Company in Zhejiang Province developed a cable manhole cover lifting trolley with an anti-disengagement lifting rod, using a handcart as a lever to lift the cover. This device has some ability to move the cover, but it is difficult to operate manually.

[0005] Overall, current research consists of auxiliary tools that can provide limited assistance in the opening and closing of cable manhole covers, but they cannot effectively solve the various practical difficulties faced in this operation, especially in terms of both storage and easy relocation. Summary of the Invention

[0006] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a method for the deployment and retraction of a cable manhole cover opening and closing device.

[0007] Technical Solution: This invention provides a method for deploying and retracting a cable manhole cover opening device. The method includes a deployment step, a lifting step, and a retraction step.

[0008] The deployment steps of the cable manhole cover opening device include:

[0009] A1) When the cable manhole cover opening device located on the transport vehicle and in the stored state needs to be unfolded and moved, the cable manhole cover opening device is gradually pulled out of the transport vehicle. When the auxiliary support legs are all in the air, the second limit gas spring is opened by pulling the cable switch, the auxiliary support legs are straightened, and then the height of the auxiliary support legs is adjusted so that the second support wheel on the auxiliary support legs touches the ground.

[0010] A2) Then continue to pull outwards. When all the movable support legs are in the air and the auxiliary wheels are still on the transport vehicle, open the first gas spring and use the folding linkage to straighten the movable support legs. Then pull outwards to make the first support wheel on the movable support leg touch the ground. The cable well cover opening device can then be pulled out as a whole and put into the unfolded state.

[0011] The storage steps for the cable manhole cover opening device include:

[0012] The steps for switching the cable manhole cover opening device from its operational state to its deployed state; and

[0013] The steps for storing the cable manhole cover opening device in its unfolded state;

[0014] The lifting steps for the cable manhole cover opening device include: when the cable manhole cover opening device, which is in the unfolded state, needs to be lifted,

[0015] C1) Move the cable well cover opening device to the lifting position, rotate the mantis leg to make it into a figure eight shape, then lower the jack vertically, and adjust the lifting mechanism of the jack so that the bottom plate of the jack touches the ground.

[0016] C2) By pulling the cable switch to close the second limit gas spring, the auxiliary support leg is automatically retracted to the bottom of the main frame, thereby putting the cable well cover opening device into operation.

[0017] C3) Lifting operation of manhole cover.

[0018] More preferably, in the storage step of the cable manhole cover opening device:

[0019] The step of switching the cable manhole cover opening device from the working state to the unfolded state specifically includes:

[0020] B11) Remove the lifting device;

[0021] B12) Open the second limit gas spring by pulling the cable switch, straighten the auxiliary support leg, adjust the height of the auxiliary support leg so that the auxiliary support leg is the same length as the moving support leg, and make the second support wheel on the auxiliary support leg touch the ground;

[0022] B13) The jack is retracted by the lifting mechanism on the jack, and the mantis legs are rotated to fold and store it at the bottom of the main frame;

[0023] The step of storing the cable manhole cover opening device in its unfolded state specifically includes:

[0024] B21) Push the cable manhole cover opening device to the transport vehicle and make the mobile support leg touch / collide with the transport vehicle platform first. The mobile support leg will automatically retract to the bottom of the main frame through the impact force.

[0025] B22) Continue to push the cable manhole cover opening device. The auxiliary wheel rolls forward on the transport platform of the transport vehicle, causing the center of gravity of the cable manhole cover opening device to move forward continuously. Then, the second limit gas spring is closed by the pull-wire switch, so that the auxiliary support leg is automatically stored at the bottom of the main frame. With continued pushing, the cable manhole cover opening device can be loaded onto the vehicle and put into storage.

[0026] More preferably, the method further includes a small-range movement step and a large-range movement step;

[0027] The steps involved in small-scale movement include:

[0028] D1) When the cable manhole cover lifting device in operation needs to be moved within a small range before or during the lifting operation, the lifting device is indirectly moved and / or rotated by moving the motor and guide rail and / or rotating the winch, thereby obtaining a small range of movement of the lifting device and / or the lifted manhole cover within the space at the bottom of the cable manhole cover lifting device.

[0029] The steps involved in large-scale movement include:

[0030] E1) Before or during the lifting operation, when the cable well cover opening device is in operation, it needs to be moved over a large area. First, the jack is raised by the lifting mechanism on the jack, and the mantis leg is rotated to fold and store it at the bottom of the main frame.

[0031] E2) Open the second limit gas spring by pulling the cable switch, straighten the auxiliary support leg, adjust the height of the auxiliary support leg so that the auxiliary support leg is the same length as the moving support leg, so that the second support wheel on the auxiliary support leg touches the ground, push the cable manhole cover opening device to move as a whole, and obtain a large range of movement of the lifting device and / or the manhole cover that has been lifted.

[0032] More preferably, in the step of storing the cable manhole cover opening device, step B21) specifically includes:

[0033] B21) Push the cable manhole cover opening device to the transport vehicle and make the mobile support leg touch / impact the transport vehicle platform first. Under the action of the impact force, the first gas spring closes and pulls the folding linkage to fold, so that the mobile support leg is automatically stored at the bottom of the main frame.

[0034] More preferably, in the process of storing the cable manhole cover opening device, step B21) specifically includes:

[0035] B21) Push the cable well cover opening device to the transport vehicle and make the contact rod on the mobile support leg touch / impact the transport vehicle platform first. Under the action of the impact force, the contact rod drives the auxiliary transmission link to rotate around the rotation center in the arc-shaped limit groove. At the same time, the first gas spring closes, and the first gas spring and the auxiliary transmission link pull the folding link to fold, so that the mobile support leg is automatically stored at the bottom of the main frame.

[0036] Preferably, the lifting step of the cable manhole cover lifting device further includes, before lifting the manhole cover:

[0037] The steps for attaching the lifting device; and

[0038] The step of moving and / or rotating the lifting device to position the manhole cover hole by moving and / or rotating the winch through a motor and guide rail.

[0039] Preferably, this deployment and retrieval method uses an easy-to-deploy and easy-to-retrieve cable manhole cover opening device, which includes:

[0040] Mainframe rack;

[0041] A lifting device that can be hoisted onto the main frame;

[0042] The support leg includes: a movable support leg that can be extended and retracted to the bottom of the main frame; and an auxiliary support leg that can be extended, retracted and height-adjustable, and retracted to the bottom of the main frame.

[0043] The mantis legs can be unfolded or stored at the bottom of the main unit rack;

[0044] Each movable support leg is equipped with a first support wheel at its lower part; each auxiliary support leg is equipped with a second support wheel at its lower part.

[0045] Each of the mantis's legs is equipped with a jack;

[0046] The main frame is also equipped with auxiliary wheels adjacent to the movable support legs.

[0047] Preferably, the movable support leg, auxiliary support leg, and mantis leg are all hinged to the main frame;

[0048] The main frame includes a frame and a crossbeam located within the frame and slidably connected thereto;

[0049] The crossbeam is also equipped with a winch that can move on the crossbeam; the lifting device can be hung on the hook of the winch.

[0050] The winch moves back and forth on the crossbeam via a gear and rack transmission.

[0051] Preferably, the crossbeam moves back and forth on the machine frame by rolling in the slot via rollers.

[0052] More preferably, it also includes several hollow brackets fixedly installed on the main frame for mounting the various support legs;

[0053] Each hollow support is provided with a rotation center hole corresponding to the rotation center of the support leg relative to the main frame;

[0054] Each movable support leg includes a movable support leg body, a first gas spring, a folding link, and a first support wheel installed on the lower part of the movable support leg body; wherein one end of the folding link is hinged to the main frame and the other end is hinged to the movable support leg body; wherein one end of the first gas spring is hinged to the main frame and the other end is hinged to the folding link.

[0055] Each auxiliary support leg includes an auxiliary support leg body, a second limiting gas spring, and a second support wheel installed on the lower part of the auxiliary support leg body; wherein one end of the second limiting gas spring is hinged to the main frame and the other end is hinged to the auxiliary support leg body; the auxiliary support leg body is an auxiliary support leg body that is height adjustable;

[0056] Each mantis leg includes a mantis leg body; the end of the mantis leg body is rotatably connected to a corresponding jack; the jack is a jack with a lifting mechanism; the lifting mechanism is a lifting mechanism with a self-locking function.

[0057] Furthermore, the hollow bracket for mounting the movable support leg is also provided with an arc-shaped limiting groove centered on its rotation center hole.

[0058] Each movable support leg also includes a contact rod and an auxiliary transmission link; the contact rod includes a contact rod center hole, and a first rod body and a second rod body extending outward relative to the contact rod center hole; the contact rod is aligned with the rotation center hole on the corresponding hollow bracket by a gap pin; the outer end of the second rod body of the contact rod and one end of the auxiliary transmission link are pinned together to the arc-shaped limiting groove on the corresponding hollow bracket; the other end of the auxiliary transmission link is hinged to the corresponding folding link;

[0059] The mantis leg body and the corresponding jack are rotated relative to each other to a certain angle via a worm gear and are then reinforced by a pin. The upper parts of the mantis leg body and the corresponding jack are rotatably fitted together and fixed by a detachable movable pin. The end of the mantis leg body is also provided with a first worm gear, and the end of the first worm gear is fixedly connected to a worm handwheel with a self-locking function. The upper part of the jack is provided with a first worm wheel that meshes and drives the first worm gear.

[0060] Beneficial effects: The extension and retraction method of the cable manhole cover opening and closing device provided by this invention has the following advantages compared with the prior art:

[0061] 1. Based on the cable manhole cover opening and closing method provided by the present invention, the cable manhole cover opening and closing device can be directly pushed and moved to different work locations. It is stable during operation and convenient during movement. It does not require the cooperation of multiple workers, effectively avoiding the occurrence of problems such as the manhole cover falling and being damaged during manual operation, as well as scratches, bumps, and pulls on workers. It greatly improves the safety of equipment, operation and personal safety, and has extremely high safety, versatility and flexibility.

[0062] 2. In the cable manhole cover opening and closing device of the present invention, the mobile small gantry crane is set above the manhole cover to be operated, and the support is adjustable, taking into account both stability and flexibility, so as to facilitate the manhole cover opening and closing operation.

[0063] 3. The cable manhole cover opening and closing device and its retraction method provided by the present invention can realize small-scale and large-scale movement of the manhole cover plate to different degrees / ranges according to the actual application scenario. It is flexible and ingenious, greatly improves the convenience of cable manhole cover opening and closing operations, and can be better applied to more different actual application scenarios.

[0064] 4. In the method for unfolding and retracting the cable manhole cover opening device provided by the present invention, the cable manhole cover opening device can be directly pushed to the transport vehicle (such as an electric engineering vehicle), and cleverly folded and stored on the transport platform by pushing. Conversely, it can also be cleverly unfolded by pulling back, so that the cable manhole cover opening device folded and stored on the transport platform can be unfolded on the ground. This cleverly realizes the simultaneous (on the basis of load-bearing support) of easily and conveniently getting the device on and off the engineering vehicle, and the folding and unfolding of the device can be completed. It is labor-saving, convenient and easy to operate, and has extremely high usability.

[0065] In summary, the present invention provides a method for deploying and retracting a cable manhole cover opening and closing device, which can flexibly switch / convert the cable manhole cover opening and closing device between various states such as storage state, working state, and unfolding and moving state. It is easy to store and unfold, easy to move the hoisted items such as cable manhole covers in a small range and a large range, and it is also easy to push and move directly. It is labor-saving, convenient, highly flexible, easy to use, and can be widely promoted and applied. Attached Figure Description

[0066] Figure 1 A schematic diagram of an easy-to-expand and easy-to-retract cable manhole cover opening device provided in the embodiment;

[0067] Figure 2 This is a schematic diagram of the easy-to-expand and easy-to-retract cable manhole cover opening device provided in this embodiment when it is in the retracted state.

[0068] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0069] Figure 4 This is a schematic diagram of the structure of the easy-to-expand and easy-to-retract cable manhole cover opening and closing device provided in this embodiment when it is in one of the unfolded states (i.e., the unfolded and moving state).

[0070] Figure 5 This is a structural diagram of the easy-to-expand and easy-to-retract cable manhole cover opening and closing device provided in this embodiment when it is in one of the operating states (and small-range movement);

[0071] Figure 6 This is a schematic diagram of the structure of the easy-to-expand and easy-to-retract cable manhole cover opening and closing device provided in this embodiment during a large-scale movement.

[0072] Figure 7 This is a schematic diagram of the easy-to-expand and easy-to-retract cable manhole cover opening and closing device provided in this embodiment when the lifting device is removed;

[0073] Figure 8 for Figure 7 A magnified view of a section at point C. Detailed Implementation

[0074] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The following embodiments do not constitute a limitation on the present invention.

[0075] This embodiment provides a method for extending and retracting a cable manhole cover opening and closing device, which uses an easy-to-extend and easy-to-retract cable manhole cover opening and closing device, such as... Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the lifting device includes:

[0076] 9 mainframe racks;

[0077] Lifting device 17 that can be hoisted onto the main frame 9;

[0078] The support leg includes: a movable support leg 3 that can be extended and straightened or retracted to the bottom of the main frame 9; and an auxiliary support leg 20 that can be extended and straightened, height-adjustable, and retracted to the bottom of the main frame 9.

[0079] The mantis legs 14 can be unfolded or stored at the bottom of the main unit rack 9;

[0080] Each movable support leg 3 is equipped with a first support wheel 1 at its lower part; each auxiliary support leg 20 is equipped with a second support wheel 21 at its lower part.

[0081] Each of the mantis legs 14 is equipped with a jack 16;

[0082] The main frame 9 is also equipped with auxiliary wheels 4 adjacent to the movable support legs 3.

[0083] In this embodiment, each movable support leg 3, each auxiliary support leg 20, and each mantis leg 14 are hinged to the main frame 9.

[0084] In this embodiment, the lifting device 17 includes a lifting device body and a hook 18; wherein the hook 18 is mounted on the lifting device body.

[0085] In this embodiment, as Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the main frame 9 includes a frame 13 and a crossbeam 11 located within and slidably connected to the frame 13; wherein the frame 13 is provided with an X-axis guide rail, and the crossbeam 11 is provided with a Y-axis guide rail 12; the crossbeam 11 is also provided with a winch 10 that can move on the crossbeam 11. The aforementioned lifting device 17 can be hung on the hook of the winch 10. The frame 13 is a frame / main frame containing an X-axis guide rail.

[0086] In this embodiment, as Figure 1 and Figure 4 As shown, an X-axis moving motor 6 is also fixedly mounted on the crossbeam 11; a Y-axis moving motor 8 is also fixedly mounted on the winch 10. In this embodiment, specifically, the winch 10 reciprocates on the crossbeam 11 via a gear and rack transmission; and the crossbeam 11 reciprocates on the machine frame 13 by rollers rolling in the slot.

[0087] In this embodiment, as Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, specifically, each movable support leg 3 includes a movable support leg body, a first gas 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 bottom of the main frame 9, and the other end is hinged to the side wall of the movable support leg body; wherein one end of the first gas 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 gas spring 5 is hinged to the folding link 22. Specifically, in this embodiment, the other end of the first gas spring 5 is hinged to the portion of the folding link 22 adjacent to the folding point.

[0088] In this embodiment, as Figures 1 to 7 As shown, it also includes several hollow brackets 23 fixedly installed on the main frame 9 for mounting the various support legs. Each movable support leg 3 and each auxiliary support leg 20 is rotatably and foldably mounted on the main frame 9 via the corresponding hollow bracket 23; or, in other words, each movable support leg 3 and each auxiliary support leg 20 is hinged to the main frame 9 through a rotation center hole on the corresponding hollow bracket 23, and is rotatably and foldably relative to the main frame 9 and the hollow bracket 23 with the rotation center corresponding to the rotation center hole.

[0089] In this embodiment, as Figure 8As shown, specifically, each hollow bracket 23 is provided with a rotation center hole 230 corresponding to the rotation center of the corresponding support leg relative to the main frame 9; the hollow bracket 23 used to install the movable support leg 3 is also provided with an arc-shaped limiting groove 231 with its rotation center hole as the center; or it can be said that each hollow bracket 23 is provided with a rotation center hole 230 corresponding to the rotation center hole 230 when the corresponding support leg is rotated and stored to the bottom of the main frame 9 for rotation folding / rotation folding.

[0090] In this embodiment, combined with Figure 7 and Figure 8 As shown, each movable support leg 3 also includes a contact rod 7 and an auxiliary transmission link 24; the contact rod 7 includes a contact rod center hole 70, and a first rod body 71 and a second rod body 72 extending outward relative to the contact rod center hole 70; the contact rod 7 is aligned with the corresponding rotation center hole on the hollow bracket 23 through the contact rod center hole 70 and the corresponding rotation center hole, or it can be said that the contact rod 7 is rotatably connected to the corresponding rotation center through a bearing or a saw; the outer end of the second rod body 72 of the contact rod 7 and one end of the auxiliary transmission link 24 are pinned together to the arc-shaped limiting 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.

[0091] In some preferred embodiments, the angle between the first rod 71 and the second rod 72 is an obtuse angle to improve force transmission.

[0092] In some preferred embodiments, specifically, such as Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the outer end of the first rod 71 of the impact rod 7 is also provided with an auxiliary roller. This structure not only helps to buffer the impact and makes folding and storage smoother and more natural, but also plays a role in rolling assistance and force support when the support leg and the cable well cover opening device are pushed forward on the transport platform of the transport vehicle (such as the tipping platform of the engineering vehicle) during the folding and storage process.

[0093] Specifically in this embodiment, such as Figure 1 and Figure 2 As shown, each movable support leg 3 also includes a leg guard plate 2 fixed to the movable support leg body. This structure helps to cushion impacts and extend the life of the support leg. In some preferred embodiments, such as Figure 1 and Figure 2As shown, the lower end of the leg guard plate 2 is also provided with auxiliary rollers. This structure plays a rolling assistance and force support role in pushing the support leg and the cable well cover opening device together on the transport platform of the transport vehicle (such as the tipping platform of the engineering vehicle) during the folding and storage process.

[0094] 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 also have extensions extending outward for mounting other components such as auxiliary wheels 4. In this embodiment, combined with Figure 7 and Figure 8 As shown, each hollow bracket 23 on which the movable support leg 3 is installed has an extension for installing other components such as the auxiliary wheel 4.

[0095] Each of the aforementioned auxiliary wheels 4 is mounted on the outer side / outer edge of the hollow bracket 23 corresponding to the movable support leg 3 via bearings. Alternatively, each auxiliary wheel 4 can be described as being mounted on the extension of the hollow bracket 23 corresponding to the movable support leg 3 via bearings.

[0096] In this embodiment, specifically as follows: Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, each auxiliary support leg 20 includes an auxiliary support leg body, a second limiting gas spring 19, and a second support wheel 21 installed on the lower part of the auxiliary support leg body;

[0097] One end of the second limiting 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 a height-adjustable auxiliary support leg body.

[0098] In this embodiment, as Figures 1 to 7 As shown, each mantis leg 14 includes a mantis leg body; the end of the mantis leg body is rotatably connected to a 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.

[0099] In some embodiments, the mantis leg body and the corresponding jack 16 are hinged.

[0100] In this embodiment, the mantis leg body and the corresponding jack 16 are rotated relative to each other to a certain angle via a worm gear and then reinforced by a pin. Specifically, the upper parts of the mantis leg body and the corresponding jack 16 are rotatably fitted together and fixed by a detachable movable pin (not shown in the figure).

[0101] In this embodiment, specifically as follows: Figure 2 and Figure 3 As shown, the end of the mantis leg body is also provided with a first worm gear 351 that is laterally rotatable relative to it. The end of the first worm gear 351 is fixedly connected to a worm gear handwheel 350 with a self-locking function. The upper part of the jack 16 is provided with a first worm wheel 352 that meshes and drives the first worm gear 351. With this structure, by pulling out the movable pin and rotating the worm gear handwheel 350, the jack can be rotated relative to the mantis leg body to the required angle through the relative transmission of the first worm wheel 352 and the first worm gear 351. Then, the movable pin is further inserted to strengthen the fixation.

[0102] This embodiment provides a method for deploying and retracting a cable manhole cover opening device. The method includes a deployment step, a lifting step, and a storage step.

[0103] The deployment steps of the cable manhole cover opening device include:

[0104] A1) When the cable manhole cover opening device located on the transport vehicle and in the stored state needs to be unfolded and moved, the cable manhole cover opening device is gradually pulled out from the side corresponding to the mantis leg 14 on the transport vehicle. When the auxiliary support leg 20 is completely airborne, the second limit gas spring 19 is opened by pulling the cable switch, the auxiliary support leg 20 is straightened, and then the height of the auxiliary support leg 20 is adjusted so that the second support wheel 21 on the auxiliary support leg 20 touches the ground.

[0105] A2) Then continue to pull outwards. When the movable support leg 3 is completely airborne and the auxiliary wheel 4 is still on the transport vehicle, open the first gas spring 5 and cooperate with the folding linkage 22 to straighten the movable support leg 3. Then pull outwards to make the first support wheel 1 on the movable support leg 3 touch the ground. The cable well cover opening device can be pulled out as a whole and put into the unfolded state.

[0106] The storage steps for the cable manhole cover opening device include:

[0107] The steps for switching the cable manhole cover opening device from its operational state to its deployed state (also known as the deployed and moving state); and

[0108] The steps for storing the cable manhole cover opening device in its unfolded state;

[0109] The lifting steps for the cable manhole cover opening device include: when the cable manhole cover opening device, which is in the unfolded state, needs to be lifted,

[0110] C1) Move the cable well cover opening device to the lifting position, rotate the mantis leg 14 to make it into a figure eight shape, and then lower the jack 16 vertically, and adjust the lifting mechanism 15 of the jack 16 so that the bottom plate of the jack touches the ground.

[0111] C2) By pulling the switch to close the second limit gas spring 19, the auxiliary support leg 20 is automatically retracted to the bottom of the main frame 9, thereby putting the cable well cover opening device into operation.

[0112] C3) Lifting operation of manhole cover.

[0113] In some preferred embodiments, the storage step of the cable manhole cover opening device includes:

[0114] The step of switching the cable manhole cover opening device from the working state to the unfolded state (also known as the unfolded moving state) specifically includes:

[0115] B11) Remove the lifting device 17;

[0116] B12) Open the second limit gas spring 19 by pulling the cable switch, the auxiliary support leg 20 straightens, adjust the height of the auxiliary support leg 20 so that the auxiliary support leg 20 is the same length as the movable support leg 3, so that the second support wheel 21 on the auxiliary support leg 20 touches the ground;

[0117] B13) The jack is retracted by the lifting mechanism 15 on the jack 16, and the mantis leg 14 and the jack 16 are rotated to fold and store it at the bottom of the main frame 9.

[0118] The step of storing the cable manhole cover opening device in its unfolded state specifically includes:

[0119] B21) Push the cable manhole cover opening device to the transport vehicle (such as an electric engineering vehicle) and make the movable support leg 3 touch / collide with the transport vehicle platform (such as the tipping platform of an engineering vehicle). The movable support leg 3 is automatically stored at the bottom of the main frame 9 by the impact force.

[0120] B22) Continue pushing the cable manhole cover opening device. The auxiliary wheel 4 rolls forward on the transport platform of the transport vehicle, causing the center of gravity of the cable manhole cover opening device to move forward continuously. After the center of gravity moves to the transport platform, the second limit gas spring 19 is closed by pulling the cable switch, so that the auxiliary support leg 20 is automatically stored at the bottom of the main frame 9. With continued pushing, the cable manhole cover opening device can be loaded onto the vehicle as a whole and put into storage.

[0121] In some preferred embodiments, the method further includes a small-range movement step and a large-range movement step;

[0122] The steps involved in small-scale movement include:

[0123] D1) When the cable manhole cover lifting device in operation needs to move within a small range before lifting (preparing to lift) or during lifting, such as moving the lifting device 17 within a small range to position the manhole cover hole or moving the manhole cover to be lifted, the winch 10 is moved and / or rotated by the motor and guide rails (X-axis moving motor 6 and Y-axis moving motor 8, as well as X-axis guide rail and Y-axis guide rail 12), thereby indirectly moving and / or rotating the lifting device 17, so as to achieve a small range of movement of the lifting device 17 and / or the lifted manhole cover within the bottom space of the main frame 9 of the cable manhole cover lifting device;

[0124] The steps involved in large-scale movement include:

[0125] E1) Before the cable manhole cover lifting device in operation is lifted (preparing to lift) or when it needs to be moved over a large area (moving the lifting device 17 over a large area, such as moving the positioning manhole cover hole over a large area, or moving the manhole cover being lifted over a large area), the lifting mechanism 15 on the jack 16 is used to retract the jack, and the mantis leg 14 and the jack 16 are rotated to fold and store it at the bottom of the main frame 9.

[0126] E2) Open the second limit gas spring 19 by pulling the cable switch, straighten the auxiliary support leg 20, adjust the height of the auxiliary support leg 20 so that the auxiliary support leg 20 is the same length as the moving support leg 3, so that the second support wheel 21 on the auxiliary support leg 20 touches the ground, push the cable well cover opening device to move as a whole, and obtain a large range of movement of the lifting device 17 and / or the well cover that has been lifted.

[0127] In this embodiment, the cable manhole cover lifting device adopts a method of same-side folding and storage support legs, namely movable support leg 3, auxiliary support leg 20, and mantis leg 14 for auxiliary support. When lifting, the span direction of the equipment is the width direction of the manhole cover, which greatly reduces the external size of the lifting device.

[0128] Meanwhile, the hole positioning of the manhole cover before lifting is achieved using X-axis moving motor 6 and Y-axis moving motor 8, which is very convenient, efficient and precise. After lifting, if a large range of movement is required, the mantis leg 14 can be retracted and the auxiliary support leg 20 can be opened to move the cable manhole cover opening device as a whole to achieve a large range of coarse adjustment. If a small range of movement is required, the X-axis moving motor 6 and Y-axis moving motor 8 can be used to achieve a small range of fine adjustment.

[0129] In some preferred embodiments, step B21) of the step of storing the cable manhole cover opening device in its unfolded state specifically includes:

[0130] B21) Push the cable manhole cover opening device to the transport vehicle (such as an electric engineering vehicle) and make the movable support leg 3 touch / impact the transport vehicle platform (such as the tipping platform of an engineering vehicle). Under the impact force, the first gas spring 5 closes and pulls the folding linkage 22 to fold, so that the movable support leg 3 is automatically stored at the bottom of the main frame 9.

[0131] In some preferred embodiments, step B21) of the step of storing the cable manhole cover opening device in its unfolded state specifically includes:

[0132] B21) Push the cable manhole cover opening device to the transport vehicle (such as an electric engineering vehicle) and make the contact 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, the contact rod 7 drives the auxiliary transmission link 24 to rotate around the rotation center in the arc-shaped limiting groove 231. At the same time, the first gas spring 5 closes, and the first gas spring 5 and the auxiliary transmission link 24 together pull the folding link 22 to fold, so that the movable support leg 3 is automatically stored at the bottom of the main frame 9.

[0133] In some preferred embodiments, the lifting step of the cable manhole cover opening device further includes, before lifting the manhole cover:

[0134] The steps of attaching the lifting device 17 (wherein: the lifting device 17 is attached to the hook of the winch 10); and

[0135] The step of moving and / or rotating the winch 10 by means of motors 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) to indirectly move and / or rotate the lifting device 17 to position the manhole cover hole. That is, the step of driving the winch 10 to move within the frame 13 of the main frame 9 by means of X-axis moving motor 6 and Y-axis moving motor 8, and X-axis guide rail and Y-axis guide rail 12 to indirectly move and / or rotate the lifting device 17 in the XY plane to position the manhole cover hole.

[0136] The first support wheel in this text may also be called a movable support wheel. The second support wheel in this text may also be called an auxiliary support wheel. The " / " in this text indicates "or". The first worm gear in this text may also be called a directional worm gear. The first worm in this text may also be called a directional worm.

[0137] The method for deploying and retracting the cable manhole cover opening device described in this article can also be called the method for deploying and retracting a retractable cable manhole cover opening device, or the method for deploying and retracting a retractable cable manhole cover plate opening device, or simply the method for deploying and retracting a cable manhole cover opening device. The cable manhole cover opening device described in this article can also be called a cable manhole cover plate opening device. The term "retractable" can also be called "easy-to-deploy and easy-to-retract." The term "deployed state" can also be called "deployed and movable state."

[0138] This invention protects the shape, structure, and construction of the easy-to-open and retractable cable manhole cover opening device, as well as the method for opening and retracting the cable manhole cover opening device. The above embodiments do not constitute a limitation of this invention. Various changes and modifications made by those skilled in the art without departing from the technical concept of this invention all fall within the protection scope of this invention.

Claims

1. A method for extending and retracting a cable manhole cover opening and closing device, characterized in that, The method includes the following steps: unfolding the cable manhole cover opening device, lifting the cable manhole cover opening device, and storing the cable manhole cover opening device. The deployment steps of the cable manhole cover opening device include: A1) When the cable manhole cover opening device located on the transport vehicle and in the storage state needs to be unfolded and moved, the cable manhole cover opening device is gradually pulled out of the transport vehicle. When the auxiliary support leg (20) is completely airborne, the second limit gas spring (19) is opened by pulling the cable switch, the auxiliary support leg (20) is straightened, and then the height of the auxiliary support leg (20) is adjusted so that the second support wheel (21) on the auxiliary support leg (20) touches the ground. A2) Then continue to pull outwards. When the movable support leg (3) is completely airborne and the auxiliary wheel (4) is still on the transport vehicle, open the first gas spring (5) and cooperate with the folding linkage (22) to straighten the movable support leg (3). Then pull outwards to make the first support wheel (1) on the movable support leg (3) touch the ground. The cable well cover opening device can be pulled out as a whole and put into the unfolded state. The storage steps for the cable manhole cover opening device include: The steps for switching the cable manhole cover opening device from its operational state to its deployed state; and The steps for storing the cable manhole cover opening device in its unfolded state; The lifting steps for the cable manhole cover opening device include: when the cable manhole cover opening device, which is in the unfolded state, needs to be lifted, C1) Move the cable well cover opening device to the lifting position, rotate the mantis leg (14) to make it into a figure eight shape, and then lower the jack (16) vertically, and adjust the lifting mechanism (15) of the jack (16) so that the bottom plate of the jack touches the ground. C2) By pulling the cable switch to close the second limit gas spring (19), the auxiliary support leg (20) is automatically retracted to the bottom of the main frame (9), thereby putting the cable well cover opening device into operation. C3) Lifting operation of manhole cover.

2. The method for extending and retracting the cable manhole cover opening and closing device according to claim 1, characterized in that: In the storage step of the cable manhole cover opening device: The step of switching the cable manhole cover opening device from the working state to the unfolded state specifically includes: B11) Remove the lifting device (17); B12) Open the second limit gas spring (19) by pulling the cable switch, straighten the auxiliary support leg (20), adjust the height of the auxiliary support leg (20) so that the auxiliary support leg (20) is the same length as the moving support leg (3), so that the second support wheel (21) on the auxiliary support leg (20) touches the ground; B13) The jack is retracted by the lifting mechanism (15) on the jack (16), and the mantis leg (14) is rotated to fold and store it at the bottom of the main frame (9); The step of storing the cable manhole cover opening device in its unfolded state specifically includes: B21) Push the cable well cover opening device to the transport vehicle and make the mobile support leg (3) touch / impact the transport vehicle platform first. The mobile support leg (3) is automatically stored at the bottom of the main frame (9) by the impact force. B22) Continue to push the cable manhole cover opening device, and the auxiliary wheel (4) rolls forward on the transport platform of the transport vehicle, so that the center of gravity of the cable manhole cover opening device moves forward continuously. Then, the second limit gas spring (19) is closed by the pull wire switch, so that the auxiliary support leg (20) is automatically stored at the bottom of the main frame (9). With continued pushing, the cable manhole cover opening device can be loaded onto the vehicle as a whole and put into storage.

3. The method for extending and retracting the cable manhole cover opening and closing device according to claim 1, characterized in that: The method also includes steps for small-scale movement and steps for large-scale movement; The steps involved in small-scale movement include: D1) When the cable manhole cover lifting device in operation needs to move within a small range before or during the lifting operation, the motor and guide rail move and / or rotate the winch (10), thereby indirectly moving and / or rotating the lifting device (17) to achieve a small range of movement of the lifting device (17) and / or the lifted manhole cover within the space at the bottom of the cable manhole cover lifting device. The steps involved in large-scale movement include: E1) When the cable well cover opening device in operation needs to be moved over a large area before or during the lifting operation, the jack is first raised by the lifting mechanism (15) on the jack (16), and the mantis leg (14) is rotated to fold and store it at the bottom of the main frame (9). E2) Open the second limit gas spring (19) by pulling the cable switch, straighten the auxiliary support leg (20), adjust the height of the auxiliary support leg (20) so that the auxiliary support leg (20) is the same length as the moving support leg (3), so that the second support wheel (21) on the auxiliary support leg (20) touches the ground, push the cable well cover opening device to move as a whole, and obtain a large range of movement of the lifting device (17) and / or the well cover that has been lifted.

4. The method for extending and retracting the cable manhole cover opening and closing device according to claim 2, characterized in that: In the process of storing the cable manhole cover opening device, step B21) specifically includes: B21) Push the cable well cover opening device to the transport vehicle and make the mobile support leg (3) touch / impact the transport vehicle platform first. Under the impact force, the first gas spring (5) closes and pulls the folding link (22) to fold, so that the mobile support leg (3) is automatically stored at the bottom of the main frame (9).

5. The method for extending and retracting the cable manhole cover opening and closing device according to claim 2, characterized in that: In the process of storing the cable manhole cover opening device, step B21) specifically includes: B21) Push the cable well cover opening device to the transport vehicle and make the contact rod (7) on the mobile support leg (3) touch / impact the transport vehicle platform first. Under the action of the impact force, the contact rod (7) drives the auxiliary transmission link (24) to rotate around the rotation center in the arc-shaped limit groove (231). At the same time, the first gas spring (5) closes, and the first gas spring (5) and the auxiliary transmission link (24) pull the folding link (22) to fold, so that the mobile support leg (3) is automatically stored at the bottom of the main frame (9).

6. The method for extending and retracting the cable manhole cover opening and closing device according to claim 1, characterized in that: The lifting steps of the cable manhole cover opening device include, before lifting the manhole cover, the following: The steps for attaching the lifting device (17); and The step of indirectly moving and / or rotating the lifting device (17) by moving and / or rotating the winch (10) via a motor and guide rail to position the manhole cover hole.

7. The method for extending and retracting the cable manhole cover opening and closing device according to any one of claims 1 to 6, characterized in that: This deployment and retrieval method utilizes an easy-to-deploy and easy-to-retrieve cable manhole cover opening device, which includes: Mainframe (9); A lifting device (17) that can be hoisted onto the main frame (9); The support leg includes: a movable support leg (3) that can be extended and straightened or retracted to the bottom of the main frame (9); and an auxiliary support leg (20) that can be extended and straightened and is height-adjustable or retracted to the bottom of the main frame (9); The mantis legs (14) can be unfolded or stored at the bottom of the main unit rack (9); Each movable support leg (3) is equipped with a first support wheel (1) at its lower part; each auxiliary support leg (20) is equipped with a second support wheel (21) at its lower part; Each of the mantis legs (14) is equipped with a jack (16); The main frame (9) is also provided with auxiliary wheels (4) adjacent to the movable support leg (3).

8. The method for extending and retracting the cable manhole cover opening and closing device according to claim 7, characterized in that: The movable support leg (3), auxiliary support leg (20) and mantis leg (14) are all hinged to the main frame (9); The main frame (9) includes a frame (13) and a crossbeam (11) located inside the frame (13) and slidably connected thereto; The crossbeam (11) is also provided with a winch (10) that can move on the crossbeam (11); the lifting device (17) can be hung on the hook of the winch (10); The winch (10) reciprocates on the crossbeam (11) via a rack and pinion drive; and / or The crossbeam (11) moves back and forth on the machine frame (13) by rolling in the slot via rollers.

9. The method for extending and retracting the cable manhole cover opening and closing device according to claim 8, characterized in that: It also includes several hollow brackets (23) that are fixedly installed on the main frame (9) for mounting the various support legs; Each hollow support (23) is provided with a rotation center hole (230) corresponding to the rotation center of the support leg relative to the main frame (9); Each movable support leg (3) includes a movable support leg body, a first gas spring (5), a folding link (22), and a first support wheel (1) installed on 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 gas spring (5) is hinged to the main frame (9), and the other end is hinged to the folding link (22); Each auxiliary support leg (20) includes an auxiliary support leg body, a second limiting gas spring (19), and a second support wheel (21) installed on the lower part of the auxiliary support leg body; wherein 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 height adjusted. Each mantis leg (14) includes a mantis leg body; the end of the mantis leg body is rotatably connected to a 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.

10. The method for extending and retracting the cable manhole cover opening and closing device according to claim 9, characterized in that: The hollow bracket (23) used to install the movable support leg (3) is also provided with an arc-shaped limiting groove (231) with its rotation center hole as the center; Each movable support leg (3) also includes a contact rod (7) and an auxiliary transmission link (24); the contact rod (7) includes a contact rod center hole (70), and a first rod body (71) and a second rod body (72) extending outward relative to the contact rod center hole (70); the contact rod (7) is aligned with the rotation center hole on the hollow bracket (23) by the contact rod center hole (70) and the corresponding rotation center hole on the hollow bracket (23) and pinned to the corresponding rotation center hole; the outer end of the second rod body (72) of the contact rod (7) and one end of the auxiliary transmission link (24) are pinned together to the arc-shaped limiting 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); The mantis leg body and the corresponding jack (16) are rotated relative to each other to a certain angle by a worm gear and are then reinforced by a pin. The upper parts of the mantis leg body and the corresponding jack (16) are rotatably connected as one unit and fixed by a detachable movable pin. The end of the mantis leg body is also provided with a first worm (351), and the end of the first worm (351) is fixed with a worm handwheel (350) with a self-locking function. The upper part of the jack (16) is provided with a first worm wheel (352) that meshes with the first worm (351) for transmission.

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