Cover plate opening and closing device

Abstract

The invention provides a cover plate opening and closing device, and the device comprises at least two fixed shafts which are arranged in a cable trench in the width direction of the cable trench, and the fixed shafts extend in the length direction of the cable trench; the jacking rods extend in the width direction of the cable trench, the middles of the at least two jacking rods are hinged to the at least two fixing shafts in a one-to-one correspondence mode, the first ends of the jacking rods are provided with cover plate matching parts, and the connecting rod extends in the width direction of the cable trench and is hinged to the second ends of the at least two jacking rods. When the jacking assembly is in the storage state, the cover plate matching part extends upwards out of the cable trench, and when the jacking assembly is in the storage state, the cover plate matching part is downwards stored in the cable trench; the electric driving piece is in driving connection with the connecting rod so as to drive the jacking assembly to be switched between the jacking state and the storage state. Through the technical scheme provided by the invention, the problem that a large amount of manpower and time are consumed when the cover plate needs to be frequently opened and closed in the prior art can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of cable trenches, and in particular to a cover plate opening and closing device. Background Art

[0002] With the increasing development of domestic urbanization, circuits are generally laid in cable trenches during urban construction, and a cover plate is set on the top of the cable trench to protect the cable trench.

[0003] In the related art, a pry hole is provided on the cable trench cover plate, so that construction workers can use a pry bar in cooperation with the pry hole to pry the cable trench cover plate relative to the cable trench and carry the cable trench cover plate.

[0004] However, the related art uses a pry bar and a pry hole to pry and transport the cover plate, which requires two people to work together to ensure stable transportation, making this transportation method inefficient. When the cover plate needs to be opened and closed frequently, it will consume a lot of manpower and time. Summary of the invention

[0005] The present invention provides a cover plate opening and closing device to solve the problem in the related art that a large amount of manpower and time are consumed when the cover plate needs to be opened and closed frequently.

[0006] The present invention provides a cover opening and closing device, which includes: at least two fixed shafts, which can be arranged in a cable trench along the width direction of the cable trench, the fixed shafts extend along the length direction of the cable trench, and both ends of the fixed shafts can be connected to the cable trench; a lifting assembly, including a connecting rod and at least two lifting rods, the at least two lifting rods extend along the width direction of the cable trench, the middle parts of the at least two lifting rods are hinged to the at least two fixed shafts in a one-to-one correspondence, the first end of the lifting rod is provided with a cover matching portion, the connecting rod extends along the width direction of the cable trench and is hinged to the second ends of the at least two lifting rods, the lifting assembly has a lifting state and a storage state, when the lifting assembly is in the lifting state, the cover matching portion can extend upward from the cable trench, and when the lifting assembly is in the storage state, the cover matching portion can be stored downward into the cable trench; an electric drive component, which can be arranged on the side wall of the cable trench, and the electric drive component is drivingly connected to the connecting rod to drive the lifting assembly to switch between the lifting state and the storage state.

[0007] Furthermore, the electric drive component includes: a cylinder body, extending along the width direction of the cable trench, one end of the cylinder body being movably connected to the cable trench; a telescopic rod, telescopically arranged on the cylinder body along the extension direction of the cylinder body, one end of the telescopic rod facing away from the cylinder body being drivably connected to the connecting rod to drive the jacking assembly to switch between the jacking state and the storage state.

[0008] Furthermore, the cover opening and closing device also includes a cable trench mounting member, which can be set on the wall surface of the cable trench, and one end of the cylinder body is connected to the cable trench mounting member.

[0009] Furthermore, the cylinder body is inclined in the width direction of the cable trench and in the depth direction of the cable trench, one end of the cylinder body is hingedly connected to the cable trench mounting piece, the hinge axis between the cylinder body and the cable trench mounting piece extends along the length direction of the cable trench, and the end of the telescopic rod facing away from the cylinder body is hingedly connected to the connecting rod.

[0010] Furthermore, the cable trench mounting member includes a fixed trench plate and a slider, the fixed trench plate extends along the depth direction of the cable trench, the slider is movably arranged on the fixed trench plate along the extension direction of the fixed trench plate, one end of the cylinder body is connected to the slider, and the end of the telescopic rod facing away from the cylinder body is hinged to the connecting rod.

[0011] Furthermore, the cable trench installation component also includes a reset component, which is arranged between the slider and the fixed slot plate to apply a reset force to the slider to move toward the notch of the fixed slot plate.

[0012] Furthermore, the cable cover has a maintenance opening corresponding to the electric drive member, and the cover opening and closing device also includes a shielding plate, which is openably and closably arranged at the maintenance opening.

[0013] Furthermore, the cover opening and closing device also includes: a sealing ring, which is arranged around the outer edge of the shielding plate and connected to the shielding plate to seal the gap between the shielding plate and the maintenance opening; and / or a safety lock, which is arranged between the shielding plate and the cable cover, and the safety lock has a protective state of locking the shielding plate and the cable cover and a maintenance state of allowing the shielding plate to be opened and closed.

[0014] Furthermore, the lifting rod includes a bending rod, which includes a first rod segment and a second rod segment that are connected and arranged at an angle, the connection between the first rod segment and the second rod segment is hinged to the fixed axis, the cover plate matching portion is arranged at one end of the first rod segment facing away from the second rod segment, and the connecting rod is hinged to one end of the second rod segment facing away from the first rod segment.

[0015] Furthermore, the cover opening and closing device includes at least two lifting assemblies arranged along the length direction of the cable trench, and the electric drive component is driven and connected to the connecting rods of the at least two lifting assemblies; and / or, the cover mating part includes a cover mounting block and a hinge shaft, the cover mounting block can be connected to the lower surface of the cable trench cover, and the first end of the lifting rod is extended along the length direction of the cable trench, and the hinge shaft is hinged to the cover mounting block.

[0016] By applying the technical solution of the present invention, the cover opening and closing device includes a lifting assembly, an electric drive component and at least two fixed shafts. When the cable trench cover needs to be opened and closed, the electric drive component is used to drive the connecting rod to move, so that the connecting rod applies torque to the second end of the lifting rod, so that the lifting rod rotates around the fixed shaft, so that the first end of the lifting rod drives the cable trench cover to move up and down through the cover mating part to achieve the opening and closing of the cable trench cover. In this process, since the connecting rod can drive at least two lifting rods to rotate, at least two lifting rods are used to open and close the cable trench cover, thereby increasing the force points of the cable trench cover, and the electric drive component is used to provide power to achieve the opening and closing of the cable trench cover, which can improve operating efficiency and operating safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram of a cover opening and closing device provided in an embodiment of the present invention is shown;

[0019] Figure 2 A top view of a cover opening and closing device provided according to an embodiment of the present invention is shown.

[0020] The above drawings include the following reference numerals:

[0021] 1. Cable trench; 2. Cable trench cover;

[0022] 10. Fixed axis;

[0023] 20, lifting assembly; 21, connecting rod; 22, lifting rod; 221, cover plate matching part; 2211, cover plate mounting block; 2212, hinge shaft; 222, bending rod; 2221, first rod section; 2222, second rod section;

[0024] 30. Electric drive member; 31. Cylinder body; 32. Telescopic rod;

[0025] 40. Cable trench mounting parts; 50. Shielding plate; 70. Safety lock;

[0026] X, length direction of the cable trench; Y, width direction of the cable trench. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a cover opening and closing device, which includes a lifting assembly 20, an electric drive member 30 and at least two fixed shafts 10. The at least two fixed shafts 10 can be arranged in the cable trench 1 along the width direction of the cable trench 1. The fixed shafts 10 extend along the length direction of the cable trench 1. Both ends of the fixed shafts 10 can be connected to the cable trench 1. The lifting assembly 20 includes a connecting rod 21 and at least two lifting rods 22. The at least two lifting rods 22 extend along the width direction of the cable trench 1. The middle parts of the at least two lifting rods 22 are hinged to the at least two fixed shafts 10 one by one. A cover plate fitting portion 221 is provided at the first end of the rod 22, and the connecting rod 21 extends along the width direction of the cable trench 1 and is hinged to the second ends of at least two lifting rods 22. The lifting assembly 20 has a lifting state and a storage state. When the lifting assembly 20 is in the lifting state, the cover plate fitting portion 221 can extend upward from the cable trench 1. When the lifting assembly 20 is in the storage state, the cover plate fitting portion 221 can be stored downward into the cable trench 1. The electric drive component 30 can be arranged on the side wall of the cable trench 1, and the electric drive component 30 is driven and connected to the connecting rod 21 to drive the lifting assembly 20 to switch between the lifting state and the storage state.

[0029] The cover opening and closing device provided in this embodiment includes a lifting assembly 20, an electric drive component 30 and at least two fixed shafts 10. When it is necessary to open and close the cable trench cover, the electric drive component 30 is used to drive the connecting rod 21 to move, so that the connecting rod 21 applies torque to the second end of the lifting rod 22, so that the lifting rod 22 rotates around the fixed shaft 10, so that the first end of the lifting rod 22 drives the cable trench cover to move up and down through the cover mating portion 221 to achieve the opening and closing of the cable trench cover. In this process, since the connecting rod 21 can drive at least two lifting rods 22 to rotate, at least two lifting rods 22 are used to open and close the cable trench cover, thereby increasing the force points of the cable trench cover, and the electric drive component 30 is used to provide power to achieve the opening and closing of the cable trench cover, which can improve operating efficiency and operating safety.

[0030] It should be noted that the length direction of the cable trench 1 refers to Figure 2The X direction marked in the figure refers to the width direction of the cable trench 1. Figure 2 The Y direction is marked in .

[0031] like Figure 1 and Figure 2 As shown, the electric drive member 30 includes a cylinder body 31 and a telescopic rod 32. The cylinder body 31 extends along the width direction of the cable trench 1. One end of the cylinder body 31 can be movably connected to the cable trench 1. The telescopic rod 32 is telescopically arranged on the cylinder body 31 along the extension direction of the cylinder body 31. The end of the telescopic rod 32 facing away from the cylinder body 31 is drivingly connected to the connecting rod 21 to drive the jacking assembly 20 to switch between the jacking state and the storage state.

[0032] When the cable trench cover needs to be opened and closed, the telescopic rod 32 moves relative to the cylinder body 31 along the extension direction of the cylinder body 31, so that the connecting rod 21 applies torque to the second end of the lifting rod 22, so that the lifting rod 22 rotates around the fixed axis 10, so that the first end of the lifting rod 22 drives the cable trench cover to move up and down through the cover mating part 221 to realize the opening and closing of the cable trench cover.

[0033] like Figure 1 and Figure 2 As shown, the cover opening and closing device also includes a cable trench mounting member 40, which can be arranged on the wall of the cable trench 1, and one end of the cylinder body 31 is connected to the cable trench mounting member 40. By adopting the above-mentioned cable trench mounting member 40, by arranging the cable trench mounting member 40 on the wall of the cable trench 1, it is convenient to install the cylinder body 31 in the cable trench 1.

[0034] Specifically, the “cable trench mounting member 40 is disposed on the wall surface of the cable trench 1” has the following two embodiments:

[0035] (1) The cable trench mounting member 40 is fixedly mounted on the wall surface of the cable trench 1, one end of the cylinder body is hingedly connected to the cable trench mounting member, the hinge axis between the cylinder body and the cable trench mounting member extends along the length direction of the cable trench, one end of the telescopic rod away from the cylinder body is hingedly connected to the connecting rod, and the cylinder body is inclinedly arranged in the width direction of the cable trench along the depth direction of the cable trench;

[0036] (2) The cable trench mounting member includes a fixed trench plate and a slider. The fixed trench plate is fixedly mounted on the wall surface of the cable trench and extends in the depth direction of the cable trench. The slider is movably arranged on the fixed trench plate along the extension direction of the fixed trench plate. One end of the cylinder body is connected to the slider, and the end of the telescopic rod facing away from the cylinder body is hinged to the connecting rod.

[0037] In this embodiment, if Figure 1 and Figure 2As shown, the cylinder body 31 is tilted in the width direction of the cable trench 1 and in the depth direction of the cable trench 1. One end of the cylinder body 31 is hingedly connected to the cable trench mounting member 40. The hinge axis 2212 of the cylinder body 31 and the cable trench mounting member 40 extends along the length direction of the cable trench 1. The end of the telescopic rod 32 away from the cylinder body 31 is hingedly connected to the connecting rod 21. When the cable trench cover needs to be opened and closed, the telescopic rod 32 moves relative to the cylinder body 31 along the extension direction of the cylinder body 31. At this time, the telescopic rod 32 applies a reaction force to the cylinder body 31 to drive the cylinder body 31 to swing relative to the cable trench mounting member 40, and the connecting rod 21 applies a torque to the second end of the lifting rod 22, so that the lifting rod 22 rotates around the fixed axis 10, so that the first end of the lifting rod 22 drives the cable trench cover to move up and down through the cover matching portion 221 to realize the opening and closing of the cable trench cover.

[0038] In other embodiments, the cable trench mounting member 40 includes a fixed trench plate and a slider, the fixed trench plate extends in the depth direction of the cable trench 1, the slider is movably arranged on the fixed trench plate along the extension direction of the fixed trench plate, one end of the cylinder body 31 is connected to the slider, and the end of the telescopic rod 32 that is away from the cylinder body 31 is hinged to the connecting rod 21. When it is necessary to open and close the cable trench cover, the telescopic rod 32 moves relative to the cylinder body 31 along the extension direction of the cylinder body 31. At this time, the telescopic rod 32 applies a reaction force to the cylinder body 31, so that the cylinder body 31 drives the slider to move along the extension direction of the fixed trench plate, and the connecting rod 21 applies a torque to the second end of the lifting rod 22, so that the lifting rod 22 rotates around the fixed axis 10, so that the first end of the lifting rod 22 drives the cable trench cover to move up and down through the cover mating portion 221 to realize the opening and closing of the cable trench cover.

[0039] Specifically, the cable trench mounting member 40 further includes a reset member, which is disposed between the slider and the fixed slot plate to apply a reset force to the slider to move toward the slot of the fixed slot plate. By using the reset member disposed between the slider and the fixed slot plate, a reset force is applied to the slider to move toward the slot of the fixed slot plate, so that when the electric drive member 30 unloads the force, the slider is facilitated to move upward and reset.

[0040] like Figure 1 and Figure 2 As shown, the cable cover has a maintenance opening corresponding to the electric drive member 30, and the cover opening and closing device also includes a shielding plate 50, which is openably and closably arranged at the maintenance opening.

[0041] When the electric drive component 30 needs to be inspected, the shielding plate 50 is opened to inspect the electric drive component through the maintenance port. When the internal structure of the cable trench 1 does not need to be inspected, the maintenance port is closed using the shielding plate 50 to protect the electric drive component 30.

[0042] like Figure 1 and Figure 2As shown, the cover opening and closing device also includes a sealing ring, which is arranged around the outer edge of the shielding plate 50 and connected to the shielding plate 50 to seal the gap between the shielding plate 50 and the maintenance opening.

[0043] Among them, a sealing ring is used to surround the outer edge of the shielding plate 50 and connected to the shielding plate 50 to seal the gap between the shielding plate 50 and the maintenance port, which can prevent external water or small animals from entering the cable trench 1 through the gap between the shielding plate 50 and the maintenance port and causing damage.

[0044] like Figure 1 and Figure 2 As shown, the cover opening and closing device further includes a safety lock 70, which is arranged between the shielding plate 50 and the cable cover plate. The safety lock 70 has a protection state of locking the shielding plate 50 and the cable cover plate and a maintenance state of allowing the shielding plate 50 to be opened and closed. When there is no need to inspect the internal structure of the cable trench 1, the safety lock 70 is used to lock the shielding plate 50 and the cable cover plate to prevent non-staff from opening the shielding plate 50 at will, thereby improving the protection reliability of the shielding plate 50.

[0045] like Figure 1 and Figure 2 As shown, the lifting rod 22 includes a bending rod 222, and the bending rod 222 includes a first rod segment 2221 and a second rod segment 2222 that are connected and set at an angle. The connection between the first rod segment 2221 and the second rod segment 2222 is hinged to the fixed shaft 10, and the cover plate matching portion 221 is arranged at one end of the first rod segment 2221 away from the second rod segment 2222, and the connecting rod 21 is hinged to one end of the second rod segment 2222 away from the first rod segment 2221.

[0046] Among them, by connecting the first rod segment 2221 and the second rod segment 2222 at an angle, the size of the lifting rod 22 in the width direction of the cable trench is reduced while the lengths of the first rod segment 2221 and the second rod segment 2222 remain unchanged, so that the cover opening and closing device has a compact structure and helps to achieve structural miniaturization.

[0047] In this embodiment, the length of the second rod segment 2222 is greater than that of the first rod segment 2221, so that the lifting rod 22 forms a lever structure. According to the lever principle, applying a driving force to the long arm end of the lever structure (i.e., the end of the second rod segment 2222 away from the first rod segment 2221) can enable the short arm end of the lever structure (i.e., the end of the first rod segment 2221 away from the second rod segment 2222) to output a force greater than the driving force, thereby achieving a labor-saving effect.

[0048] In this embodiment, the second rod segment 2222 adopts an arc-shaped structure, and the middle portion of the second rod segment 2222 protrudes in a direction away from the first rod segment 2221, so that the movement trajectory of the lifting rod 22 is smoother and the movement resistance is reduced.

[0049] like Figure 1 and Figure 2 As shown, the cover opening and closing device includes at least two lifting assemblies 20 arranged along the length direction of the cable trench 1, and the electric drive member 30 is drivingly connected to the connecting rods 21 of the at least two lifting assemblies 20.

[0050] Among them, since the electric drive component 30 is driven and connected with the connecting rod 21 of at least two jacking assemblies 20, at least two jacking assemblies 20 are used to open and close the cable trench cover, and the force points of the cable trench cover are increased. Therefore, only one electric drive component 30 is required to perform one action to drive at least two jacking assemblies 20 to realize the opening and closing of the cable trench cover, saving the number of driving components and simplifying the driving action.

[0051] like Figure 1 and Figure 2 As shown, the cover plate matching part 221 includes a cover plate mounting block 2211 and a hinge shaft 2212. The cover plate mounting block 2211 can be connected to the lower surface of the cable trench cover plate 2. The hinge shaft 2212 is provided with the first end of the jacking rod 22 extending along the length direction of the cable trench 1. The hinge shaft 2212 is hinged to the cover plate mounting block 2211. The cover plate matching part 221 with the above structure is connected to the lower surface of the cable trench cover plate 2 by the cover plate mounting block 2211, which can further prevent the cable trench cover plate from falling and improve the operation safety.

[0052] The cover opening and closing device provided in this embodiment has the following beneficial effects:

[0053] (1) The force points of the cable trench cover are increased, so that only one electric drive member 30 needs to be moved once to drive at least two lifting assemblies 20 to open and close the cable trench cover, thereby saving the number of drive components and simplifying the drive action;

[0054] (2) The lifting rod 22 has a labor-saving effect based on the lever principle.

[0055] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0057] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0058] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0059] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cover opening and closing device, characterized in that: The cover opening and closing device comprises: At least two fixed shafts (10) can be arranged in the cable trench (1) in a row along the width direction of the cable trench (1), the fixed shafts (10) extend along the length direction of the cable trench (1), and both ends of the fixed shafts (10) can be connected to the cable trench (1); A lifting assembly (20) comprises a connecting rod (21) and at least two lifting rods (22), wherein the at least two lifting rods (22) extend along the width direction of the cable trench (1), the middle parts of the at least two lifting rods (22) are hingedly connected to the at least two fixed shafts (10) in a one-to-one correspondence, the first end of the lifting rod (22) is provided with a cover plate matching portion (221), the connecting rod (21) extends along the width direction of the cable trench (1) and is hingedly connected to the second ends of the at least two lifting rods (22), the lifting assembly (20) has a lifting state and a storage state, when the lifting assembly (20) is in the lifting state, the cover plate matching portion (221) can extend upward from the cable trench (1), when the lifting assembly (20) is in the storage state, the cover plate matching portion (221) can be stored downward into the cable trench (1); The electric drive component (30) can be arranged on the side wall of the cable trench (1), and the electric drive component (30) is drivingly connected to the connecting rod (21) to drive the lifting assembly (20) to switch between the lifting state and the storage state.

2. The cover opening and closing device according to claim 1, characterized in that: The electric drive member (30) comprises: A cylinder body (31) extends along the width direction of the cable trench (1), and one end of the cylinder body (31) can be movably connected to the cable trench (1); A telescopic rod (32) is telescopically arranged on the cylinder body (31) along the extension direction of the cylinder body (31), and one end of the telescopic rod (32) facing away from the cylinder body (31) is drivingly connected to the connecting rod (21) to drive the lifting assembly (20) to switch between the lifting state and the storage state.

3. The cover opening and closing device according to claim 2, characterized in that: The cover opening and closing device also includes a cable trench mounting member (40), which can be arranged on the wall surface of the cable trench (1), and one end of the cylinder body (31) is connected to the cable trench mounting member (40).

4. The cover opening and closing device according to claim 3, characterized in that: The cylinder body (31) is arranged obliquely in the width direction of the cable trench (1) and in the depth direction of the cable trench (1); one end of the cylinder body (31) is hingedly connected to the cable trench mounting member (40); a hinge axis (2212) between the cylinder body (31) and the cable trench mounting member (40) extends along the length direction of the cable trench (1); and one end of the telescopic rod (32) facing away from the cylinder body (31) is hingedly connected to the connecting rod (21).

5. The cover opening and closing device according to claim 3, characterized in that: The cable trench mounting member (40) comprises a fixed trench plate and a slider, wherein the fixed trench plate extends in the depth direction of the cable trench (1), and the slider is movably arranged on the fixed trench plate along the extension direction of the fixed trench plate, one end of the cylinder body (31) is connected to the slider, and one end of the telescopic rod (32) facing away from the cylinder body (31) is hinged to the connecting rod (21).

6. The cover opening and closing device according to claim 5, characterized in that: The cable duct installation member (40) further comprises a reset member, which is arranged between the slider and the fixed slot plate to apply a reset force to the slider to move toward the slot of the fixed slot plate.

7. The cover opening and closing device according to claim 1, characterized in that: The cable cover plate has a maintenance opening arranged corresponding to the electric drive member (30), and the cover plate opening and closing device also includes a shielding plate (50), and the shielding plate (50) is arranged at the maintenance opening in an openable and closable manner.

8. The cover opening and closing device according to claim 7, characterized in that: The cover opening and closing device also includes: a sealing ring, arranged around the outer edge of the shielding plate (50) and connected to the shielding plate (50) to seal the gap between the shielding plate (50) and the maintenance opening; and / or, A safety lock (70) is arranged between the shielding plate (50) and the cable cover plate, and the safety lock (70) has a protection state for locking the shielding plate (50) and the cable cover plate, and a maintenance state for allowing the shielding plate (50) to be opened and closed.

9. The cover opening and closing device according to claim 1, characterized in that: The lifting rod (22) comprises a bending rod (222), and the bending rod (222) comprises a first rod segment (2221) and a second rod segment (2222) which are connected and arranged at an angle, the connection between the first rod segment (2221) and the second rod segment (2222) is hinged to the fixed shaft (10), the cover plate matching portion (221) is arranged at an end of the first rod segment (2221) that is away from the second rod segment (2222), and the connecting rod (21) is hinged to an end of the second rod segment (2222) that is away from the first rod segment (2221).

10. The cover opening and closing device according to claim 1, characterized in that: The cover opening and closing device comprises at least two lifting assemblies (20) arranged along the length direction of the cable trench (1), and the electric drive member (30) is drivingly connected to the connecting rods (21) of the at least two lifting assemblies (20); and / or, The cover plate matching portion (221) comprises a cover plate mounting block (2211) and a hinge shaft (2212); the cover plate mounting block (2211) can be connected to the lower surface of the cable trench cover plate (2); the hinge shaft (2212) is provided with a first end of the lifting rod (22) extending along the length direction of the cable trench (1); and the hinge shaft (2212) is hinged to the cover plate mounting block (2211).

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