Well lid opening and closing device

Abstract

The utility model discloses a well lid opening and closing device which comprises a first supporting piece, a second supporting piece, a moving assembly and a clamping hook, the first supporting piece is fixedly connected with the second supporting piece, and an obtuse angle is formed between the first supporting piece and the second supporting piece; the moving assembly is arranged close to the first supporting piece, fixedly installed at the bottom of the second supporting piece and used for achieving the moving function and serving as a lever fulcrum at the same time. The clamping hook is arranged far away from the first supporting piece and fixedly connected with the second supporting piece so as to penetrate through an opening of the well lid to hook the well lid. According to the well lid tilting device, the clamping hook enters a single opening of the well lid, the moving assembly serves as a lever fulcrum, the first supporting piece is pressed downwards, the second supporting piece drives the clamping hook to tilt up, then the well lid can be tilted up, and the well lid can be transported to the outside of a well mouth through the moving assembly after the well lid is tilted up, or the well lid can be transported to the well mouth from the distance to be installed. The operation process is simple, time is saved, and working efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover disassembly and assembly technology, and in particular to a manhole cover opening and closing device. Background Technology

[0002] There are many manhole covers and covers at nuclear power plant sites. Due to the need for pipeline equipment maintenance, they need to be opened and closed frequently so that workers can enter the pipelines to perform related operations.

[0003] Currently, nuclear power plant workers use iron hooks to pull open manhole covers or slabs. However, manhole covers are usually made of ductile iron, which makes them relatively heavy. In particular, the lever method of pulling with iron hooks requires considerable strength, and many slender workers have strained their arms or twisted their backs as a result. In addition, there have been accidents where hands and ankles have been pinched. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a manhole cover opening and closing device.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a manhole cover opening and closing device, including a first support member, a second support member, a moving component, and a hook. The first support member is fixedly connected to the second support member, and an obtuse angle is formed between the first support member and the second support member. The moving component is disposed close to the first support member and fixedly installed at the bottom of the second support member to realize the moving function and act as a lever fulcrum. The hook is disposed away from the first support member and fixedly connected to the second support member to hook the manhole cover through the opening of the manhole cover.

[0006] In some embodiments, the movable component includes a mounting base and at least two pulleys, the two pulleys being rotatably connected to the mounting base, and the mounting base being fixedly connected to the second support member.

[0007] In some embodiments, the hook is an inverted T-shaped or L-shaped structure.

[0008] In some embodiments, the hook is 2.5cm-4cm long and / or 1cm-2.5cm wide.

[0009] In some embodiments, the angle formed between the hook and the second support member is 80°-100°.

[0010] In some embodiments, the hook and the second support are perpendicular to each other.

[0011] In some embodiments, the angle formed between the first support member and the second support member is 90°-120°.

[0012] In some embodiments, the manhole cover opening and closing device further includes reinforcing ribs, which are fixedly connected to the ends of the first support member and the second support member near the hook, respectively, to form a mechanical triangular structure.

[0013] In some embodiments, the manhole cover opening and closing device further includes a storage frame, which is connected to the second support member for placing a fence;

[0014] The manhole cover opening and closing device further includes a baffle, which is connected to the upper middle part of the first support member, and the upper surface of the baffle is perpendicular to the placement surface of the placement frame for the fence to abut against; and / or, the manhole cover opening and closing device further includes a fixing ring, which is connected to the upper middle part of the first support member for securing the fence with a connector.

[0015] In some embodiments, the manhole cover opening and closing device further includes a handle, the handle being fixedly connected to the end of the first support member away from the second support member;

[0016] The manhole cover opening and closing device also includes a plurality of handles, the handles being fixedly connected to the handle; and / or, the manhole cover opening and closing device also includes a plurality of grippers, the grippers being connected to the upper middle part of the first support member.

[0017] By implementing this utility model, the following beneficial effects can be achieved:

[0018] This utility model discloses a manhole cover opening and closing device, comprising a first support member, a second support member, a moving component, and a hook. The first support member is fixedly connected to the second support member, and an obtuse angle is formed between them. The moving component is positioned close to the first support member and fixedly installed at the bottom of the second support member, serving both as a moving component and a lever fulcrum. The hook is positioned away from the first support member and fixedly connected to the second support member, used to pass through an opening in the manhole cover and hook onto the manhole cover. By inserting the hook into a single opening in the manhole cover, the moving component acts as a lever fulcrum. When the first support member is pressed down, the second support member causes the hook to lift, thus lifting the manhole cover. After lifting, the manhole cover can be transported to the outside of the manhole using the moving component, or transported from a distance to the manhole for installation. The operation is simple, time-saving, and highly efficient. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0020] Figure 1 This is one of the structural schematic diagrams of a manhole cover opening and closing device according to an embodiment of this utility model;

[0021] Figure 2 yes Figure 1 The second schematic diagram of the manhole cover opening and closing device;

[0022] Figure 3 yes Figure 1 Left view of the manhole cover opening and closing device;

[0023] Figure 4 yes Figure 1 A schematic diagram of the hook structure in the middle;

[0024] Figure 5 yes Figure 1 A schematic diagram illustrating the method of transporting the manhole cover opening and closing device to the railing;

[0025] Figure 6 yes Figure 1 One of the schematic diagrams illustrating a method for opening a hingeless manhole cover using a manhole cover opening and closing device.

[0026] Figure 7 yes Figure 6 Schematic diagram two of the method for opening a hingeless manhole cover using a manhole cover opening and closing device;

[0027] Figure 8 yes Figure 6 Schematic diagram three of the methods for opening hingeless manhole covers using the manhole cover opening and closing device;

[0028] Figure 9 yes Figure 6 Schematic diagram four of the method for opening a hingeless manhole cover using a manhole cover opening and closing device;

[0029] Figure 10 yes Figure 1 One of the schematic diagrams illustrating the method of opening a hinged manhole cover using a manhole cover opening and closing device;

[0030] Figure 11 yes Figure 10 Schematic diagram two of the method for opening a hinged manhole cover using a manhole cover opening and closing device;

[0031] Figure 12 yes Figure 10 The third schematic diagram of the method for opening a hinged manhole cover using a manhole cover opening and closing device;

[0032] Figure 13 yes Figure 10 The fourth diagram illustrates the method of opening a hinged manhole cover using a manhole cover opening and closing device. Detailed Implementation

[0033] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0035] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a chemical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] See Figures 1 to 13 One embodiment of this utility model discloses a manhole cover opening and closing device, applicable to the opening and closing of manhole cover 9, and also applicable to the opening and closing of other covers such as grating covers. The manhole cover 9 and the cover plate are provided with at least one hole. For example, to facilitate opening, closing, and movement, the manhole cover 9 is designed with a cross-shaped opening 91, 3cm-5cm long and 2cm-3cm wide.

[0038] like Figures 1 to 3 As shown, the manhole cover opening and closing device includes a first support member 1, a second support member 2, a moving component 3, and a hook 4. The first support member 1 and the second support member 2 are fixedly connected, and an obtuse angle is formed between them. The moving component 3 is located close to the first support member 1 and is fixedly installed at the bottom of the second support member 2 to achieve the moving function and also act as a lever fulcrum. The hook 4 is located away from the first support member 1 and is fixedly connected to the second support member 2 to hook the manhole cover 9 through the opening 91.

[0039] Specifically, the first support member 1 is welded and fixed to the second support member 2, and the hook 4 is welded and fixed to the end of the second support member 2 away from the first support member 1. The first support member 1 can be a long rod or a long plate, and the second support member 2 can be a short rod or a short plate. The length of the first support member 1 is greater than the length of the second support member 2. For example, the length of the first support member 1 is 1.5 times or 2 times the length of the second support member 2.

[0040] The first support member 1, the movable component 3, and the second support member 2 satisfy the lever principle, with the point of force on the movable component 3, which also acts as the fulcrum. Pressing down on the first support member 1 causes it to rotate downwards around the movable component 3, while the second support member 2 rotates upwards; that is, both the first and second support members 1 and 2 can rotate around the movable component 3. The hook 4 is used to hook the manhole cover 9. The hook 4 passes through the opening 91 of the manhole cover 9, hooks the manhole cover 9, and moves upwards with the second support member 2, prying up the manhole cover 9. When necessary, the movable component 3 removes the manhole cover 9.

[0041] In some embodiments, the movable component 3 includes a mounting base 31 and at least two pulleys 32. The two pulleys 32 are rotatably connected to the mounting base 31, and the mounting base 31 is fixedly connected to the second support member 2. The pulleys 32 act as movable components, enabling the device to move, and also serve as lever fulcrums. The mounting base 31 includes a pulley 32 base and a mounting plate. The pulley 32 base is fixedly connected to the mounting plate, and the pulleys 32 are rotatably connected to the pulley 32 base. The mounting plate is fixedly connected to the second support member 2. The connections between the mounting base 31, the pulley 32 base, and the second support member 2 are welded. The number of pulleys 32 can be set according to actual needs, and can be three, four, five, etc. All pulleys 32 are axially aligned and perpendicular to the second support member 2. Correspondingly, the mounting plate is perpendicular to the second support member 2.

[0042] like Figure 4 As shown, in some embodiments, the hook 4 has an inverted T-shape or L-shape structure. The hook 4 corresponds to the opening 91 on the manhole cover 9 so as to be inserted into the manhole cover 9. The horizontal section of the T-shaped or L-shaped hook 4 serves as the locking part to lock and limit the manhole cover 9 and the cover plate.

[0043] In some embodiments, the hook 4 is 2.5cm-4cm long and / or 1cm-2.5cm wide, adapting to the size of the opening 91 on the manhole cover 9. For example, the hook 4 is 2.5cm, 3cm, 4cm long, etc., and 1cm, 2cm, 2.5cm wide, etc. Understandably, in some other embodiments, the size of the hook 4 corresponds to the size of the opening 91 of the manhole cover 9 or other cover plate that needs to be opened and closed, so that the hook 4 can enter the opening 91 and hook onto the manhole cover 9 or other cover plate.

[0044] In some embodiments, the angle formed between the hook 4 and the second support member 2 is 80°-100°. For example, 80°, 90°, or 100°. Preferably, in this embodiment, the hook 4 and the second support member 2 are perpendicular to each other. That is, the angle formed between the hook 4 and the second support member 2 is 90°.

[0045] In some embodiments, the angle formed between the first support member 1 and the second support member 2 is 90°-120°. For example, 90°, 100°, 120°, etc. This ensures that the manhole cover 9 can be opened more than 90° after the handle 81 is placed on the ground.

[0046] In some embodiments, the manhole cover opening and closing device further includes reinforcing ribs 5, which are fixedly connected to the ends of the first support member 1 and the second support member 2 near the hook 4 to form a mechanical triangular structure. The reinforcing ribs 5 enhance the stability of the manhole cover opening and closing device.

[0047] During on-site operations, specifically when the manhole cover 9 is open or closed, a safety barrier 10 is required to safely enclose the work area. Typically, the safety barrier 10 is carried by the workers, increasing their workload and labor burden. To solve this problem, this utility model provides the following structure:

[0048] like Figures 1 to 3 and Figure 5 As shown, in some embodiments, the manhole cover opening and closing device further includes a storage frame 6, which is connected to the second support member 2 for placing the fence 10. The storage frame 6 may include a base plate 61 and a side frame 62. The upper part of the base plate 61 is a storage surface for placing the fence 10. The side frame 62 is used for limiting and preventing the fence 10 from sliding out. The manhole cover opening and closing device also includes a baffle 71, which is connected to the upper middle part of the first support member 1, and the upper surface of the baffle 71 is perpendicular to the storage surface of the storage frame 6 for the fence 10 to abut against. And / or, the manhole cover opening and closing device also includes a fixing ring 72, which is connected to the upper middle part of the first support member 1 for securing the fence 10 with a connector. The fence 10 is transported by loading it into the storage frame 6. When transporting the fence 10, the baffle 71 is used to abut the fence 10, serving as a barrier. The fixing ring 72 is used to secure the fence 10 via connectors, limiting the swaying of the safety fence 10 during transport. The baffle 71 and fixing ring 72 are structural components that maintain the stability of the fence 10 and can be configured according to actual needs. Specifically, there are the following three embodiments:

[0049] First embodiment: as follows Figure 5 As shown, the manhole cover opening and closing device also includes a storage frame 6 and a baffle 71. The storage frame 6 is connected to the second support member 2 for placing the fence 10. The baffle 71 is connected to the upper middle part of the first support member 1, and the upper surface of the baffle 71 is perpendicular to the storage surface of the storage frame 6 for the fence 10 to abut against. Figure 5 The first embodiment is a schematic diagram of a method for transporting the manhole cover opening and closing device's guardrail 10. The guardrail 10 in the diagram is a simplified schematic showing its placement position, not its specific structure. Furthermore, the guardrail 10 is existing technology, and this invention does not limit its structure. The second embodiment further includes a storage frame 6 and a fixing ring 72. The storage frame 6 is connected to the second support member 2 for placing the guardrail 10, and the fixing ring 72 is connected to the upper middle part of the first support member 1 for securing the guardrail 10 via a connector. The third embodiment is a combination of the first and second embodiments. The manhole cover opening and closing device further includes a storage frame 6, a baffle 71, and a fixing ring 72, with the connection method described above, and will not be repeated.

[0050] In some embodiments, the manhole cover opening and closing device further includes a handle 81, which is fixedly connected to the end of the first support member 1 away from the second support member 2. The manhole cover opening and closing device also includes a plurality of grips 82, which are fixedly connected to the handle 81; and / or, the manhole cover opening and closing device further includes a plurality of handles 83, which are connected to the upper middle part of the first support member 1. The handle 81 facilitates holding the operating device, allowing force to be applied to the handle 81 to perform corresponding actions. The grips 82 prevent the handle 81 from directly contacting the ground when the device is laid down. Direct contact with the ground by the handle 81 can easily cause injury to the back of the hand if not careful or if a novice user lacks awareness of safety precautions. The grips 82 provide a new gripping point, preventing injury and making it easier to lift the device. The handles 83 facilitate stable operation of the operating device and assist in applying force. In actual operation, to prevent the manhole cover 9 from being flipped up or closed too quickly, the operator needs to apply force; the handles 83 provide a point of force application. The force is applied by pressing down on the handle 81 with both hands. The force acts on the pulley 32, which serves as a fulcrum. The force is then transmitted to the hook 4 through the second support 2, using the lever principle to lift the manhole cover 9. The handle 81, grip 82, and grab 83 can be configured according to actual needs. Specifically, there are the following three embodiments:

[0051] First embodiment: The manhole cover opening and closing device further includes a handle 81 and several grips 82. The handle 81 is fixedly connected to the end of the first support member 1 away from the second support member 2, and the grips 82 are fixedly connected to the handle 81. For easy and stable placement after being laid down, there can be two grips 82. Second embodiment: The manhole cover opening and closing device further includes a handle 81 and several handles 83. The handle 81 is fixedly connected to the end of the first support member 1 away from the second support member 2, and the handles 83 are connected to the upper middle part of the first support member 1. Third embodiment: A combination of the first and second embodiments, the manhole cover opening and closing device further includes a handle 81, several grips 82, and several handles 83, with the connection method as described above, and will not be repeated.

[0052] This utility model's manhole cover opening and closing device combines the functions of opening and closing two types of manhole covers 9 and cover plates, as well as transporting the safety fence 10. It can reduce workload and prevent workers from twisting or straining their ankles. For example, the manhole cover opening and closing device of this utility model operates on both hingeless and hinged manhole covers 9, with the following respective usage methods:

[0053] When opening the hingeless manhole cover 9 grating cover in the same way, as Figure 6 As shown, first push the device to the side of the manhole cover 9, then align the hook 4 with the opening 91 of the manhole cover 9, and then press down the device to make the hook 4 enter the opening 91 of the manhole cover 9. Figure 7 As shown, the rotating device moves to the front of the manhole cover 9 and faces it directly, while the pulley 32 is on the ground, allowing the hook 4 to engage the manhole cover 9. Figure 8 As shown, grip handle 81 and press down firmly to pry up the manhole cover 9. Finally, as... Figure 9 As shown, the device pulls away the manhole cover 9. Because the device operates on the principle of a lever that saves effort, it allows workers to open the manhole cover 9 with less strain, making it easy for even slender workers to operate. When the manhole cover 9 is closed, the device moves it to the manhole opening, aligns it with the opening, and slowly places it in place. Once correctly positioned, the device is rotated to the side of the manhole cover 9, and then the device is lifted, causing the hook 4 to disengage from the opening 91 of the manhole cover 9, thus completing the process.

[0054] When opening the hinged manhole cover 9, if Figure 10 As shown, first push the device to the side of the manhole cover 9, then align the hook 4 with the opening 91 of the manhole cover 9, and then press down the device to make the hook 4 enter the opening 91 of the manhole cover 9. Figure 11 As shown, the rotating device moves to directly above the manhole cover 9 and the pulley 32 rests on the manhole cover 9, allowing the hook 4 to engage the manhole cover 9. Figure 12 As shown, finally, grasp handle 81 and press down firmly, simultaneously applying force to gripper 83 to pry up manhole cover 9. Then pull manhole cover 9 backward, as shown. Figure 13 As shown, the manhole cover 9 is flipped up so that its surface forms an acute angle with the ground. Under the combined effect of its own weight and the limiting effect of the device, the manhole cover 9 can be effectively prevented from falling over.

[0055] Understandably, in this embodiment Figures 1 to 13The dimensions of the manhole cover opening and closing device shown are only a schematic representation of a feasible technical solution and are not actual dimensions. The actual dimensions of the manhole cover opening and closing device can be set according to the dimensions of the manhole cover or other cover plates. Similarly, the size ratio of the manhole cover opening and closing device to the manhole cover 9 does not represent the actual size ratio. To achieve labor saving, the distance between the hook 4 and the moving component 3 can be greater than the distance between the opening of the manhole cover 9 and the geometric center of the manhole cover 9. Furthermore, the distance between the hook 4 and the moving component 3 is ≥1 / 2 the length of the manhole cover 9, which can save even more labor. Generally, the manhole cover 9 or other cover plates, such as grating covers, are generally disc-shaped or nearly disc-shaped, and the distance between the hook 4 and the moving component 3 is ≥ the radius of the manhole cover 9. The dimensions of the manhole cover opening and closing device and the manhole cover 9 are not shown in the above-mentioned dimensions diagram. By implementing this utility model, the following beneficial effects are achieved:

[0056] This utility model's manhole cover opening and closing device uses a hook 4 to enter a single opening 91 of the manhole cover 9. The moving component 3 acts as a lever fulcrum. When the first support 1 is pressed down, the second support 2 leads the hook 4 to lift, thus lifting the manhole cover 9. After lifting, the manhole cover 9 can be transported to the outside of the manhole using the moving component 3, or transported from a distance to the manhole for installation. The operation is simple, saves time, and has high work efficiency.

[0057] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, without departing from the concept of the present utility model, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made. These all fall within the protection scope of the present utility model, that is, the embodiments described "in some embodiments" can be freely combined with any of the embodiments above and below. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A device for opening and closing a manhole cover, characterized in that, The device includes a first support member (1), a second support member (2), a moving component (3), and a hook (4). The first support member (1) is fixedly connected to the second support member (2), and an obtuse angle is formed between the first support member (1) and the second support member (2). The moving component (3) is located close to the first support member (1) and is fixedly installed at the bottom of the second support member (2) to realize the moving function and act as a lever fulcrum. The hook (4) is located away from the first support member (1) and is fixedly connected to the second support member (2) to hook the manhole cover (9) through the opening (91).

2. The cover opening and closing device according to claim 1, characterized by The movable component (3) includes a mounting base (31) and at least two pulleys (32), the two pulleys (32) being rotatably connected to the mounting base (31) respectively, and the mounting base (31) being fixedly connected to the second support member (2).

3. The cover opening and closing device according to claim 1, characterized by The hook (4) has an inverted T-shaped or L-shaped structure.

4. The cover opening and closing device according to claim 3, characterized in that, The hook (4) is 2.5cm-4cm long and / or 1cm-2.5cm wide.

5. The cover opening and closing device according to claim 1, characterized by The angle between the hook (4) and the second support (2) is 80°-100°.

6. The cover opening and closing device according to claim 5, characterized in that, The hook (4) is perpendicular to the second support (2).

7. A cover opening and closing device according to any one of claims 1 to 6, characterized in that, The angle between the first support member (1) and the second support member (2) is 90°-120°.

8. The cover opening and closing device according to any one of claims 1 to 6, characterized in that, The manhole cover opening and closing device also includes reinforcing ribs (5), which are fixedly connected to the ends of the first support member (1) and the second support member (2) near the hook (4) to form a mechanical triangular structure.

9. The cover opening and closing device according to any one of claims 1 to 6, characterized in that, The manhole cover opening and closing device also includes a storage frame (6), which is connected to the second support member (2) for placing a fence (10); The manhole cover opening and closing device also includes a baffle (71), which is connected to the upper middle part of the first support member (1), and the upper surface of the baffle (71) is perpendicular to the placement surface of the placement frame (6) for the fence (10) to abut against; and / or, the manhole cover opening and closing device also includes a fixing ring (72), which is connected to the upper middle part of the first support member (1) for binding the fence (10) by a connector.

10. The cover opening and closing device according to any one of claims 1 to 6, characterized in that, The manhole cover opening and closing device also includes a handle (81), which is fixedly connected to the end of the first support member (1) away from the second support member (2); The manhole cover opening and closing device also includes a plurality of handles (82), which are fixedly connected to the handle (81); and / or, the manhole cover opening and closing device also includes a plurality of grippers (83), which are connected to the upper middle part of the first support member (1).

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