Manhole balancer with simple structure

Abstract

The utility model discloses a manhole balancer with a simple structure, which comprises a pressure container, a manhole cover is arranged on one side of the pressure container, a first hinge plate is arranged at the bottom of the manhole cover, a rotating shaft is arranged on one side of the first hinge plate, and torsional springs are arranged at two ends of the rotating shaft. A second hinge plate is arranged at the ends, away from each other, of the torsional springs, the second hinge plate is connected to the pressure container, the torsional springs apply force to the manhole cover, and the force of the torsional springs and the force needed for opening the manhole cover are balanced. According to the manhole cover, a worker can conveniently open the manhole cover in a more labor-saving manner.

Description

Technical Field

[0001] The utility model relates to the technical field of opening and closing devices for manhole covers, in particular to a manhole balancer with a simple structure. Background Art

[0002] A manhole is an opening in a building or piece of equipment, primarily used for personnel entry and exit, inspection, maintenance, or installation. It typically has a cover to ensure safety and prevent the ingress of foreign objects. Manholes are commonly found in pipelines, storage tanks, shafts, and other locations. Conventional manhole covers are made of thick metal sheets and are very heavy. Opening the cover is laborious and requires multiple people to lift it simultaneously.

[0003] In practical applications, several improvements have been proposed to reduce the workload on operators. For example, some manhole covers are constructed of lightweight materials to reduce weight, while others incorporate auxiliary tools such as levers and pulleys to help operators more easily open the covers. While these methods have alleviated operational difficulties to some extent, they still have significant limitations. Utility Model Content

[0004] The present application provides a manhole balancer with a simple structure, which makes it easier for workers to open the manhole cover with less effort.

[0005] This application provides a manhole balancer with a simple structure, which adopts the following technical solutions:

[0006] A manhole balancer with a simple structure includes a pressure vessel, a manhole cover is provided on one side of the pressure vessel, a first hinge plate is provided at the bottom of the manhole cover, a rotating shaft is provided on one side of the first hinge plate, torsion springs are provided at both ends of the rotating shaft, a second hinge plate is provided at one end of the torsion spring away from each other, the second hinge plate is connected to the pressure vessel, and the torsion spring applies force to the manhole cover so that the force of the torsion spring is balanced with the force required to open the manhole cover.

[0007] By adopting the above technical solution, the utility model designs a manhole balancer with a simple structure. When in use, the manhole cover and the first hinge plate are connected to each other, the first hinge plate is further connected to the rotating shaft, the pressure vessel and the second hinge plate are connected to each other, and the second hinge plate and the rotating shaft are simultaneously connected through a torsion spring. The torsion spring is used to apply force. When the force of the torsion spring and the force required to open the manhole cover reach a balance, it will be very labor-saving to open the manhole cover. Only a small force needs to be applied to the manhole cover to open it.

[0008] Preferably, the first hinge plate is fixed to the manhole cover and the rotating shaft respectively by welding.

[0009] By adopting the above technical solution, a firm connection is achieved between the first hinge plate, the manhole cover and the rotating shaft, which improves the stability and reliability of the structure and ensures that the manhole cover will not loosen or fall off during the opening and closing process. At the same time, the baffle transmits the force of the torsion spring.

[0010] Preferably, an adjustment plate is provided on one side of the torsion spring away from the rotating shaft, a plurality of adjustment holes are opened on the adjustment plate, and the torsion spring has two force rods, one abuts against the first hinge plate, and the other is inserted into the adjustment hole.

[0011] By adopting the above technical solution, during use, the design of the adjustment plate and the adjustment hole allows the preload force of the torsion spring to be flexibly adjusted, thereby achieving a balancing effect under different opening force requirements, thereby improving the applicability and reliability of the manhole balancer.

[0012] Preferably, the torsion spring is inserted into the adjusting hole and the force rod is sleeved with an O-shaped rubber ring, and the O-shaped rubber ring is used to increase the friction between the torsion spring and the adjusting hole, so that the force rod is not easy to fall off.

[0013] By adopting the above technical solution, the connection between the torsion spring and the adjustment hole is made more firm and reliable during use, effectively preventing the force rod from accidentally falling off due to external vibration or improper operation, and ensuring the stability and safety of the manhole balancer.

[0014] Preferably, the second hinge plate is provided with two locking holes, and the locking holes are used for threaded connection of locking bolts.

[0015] By adopting the above technical solution, when in use, two locking holes are provided on the second hinge plate, and the locking holes are used to thread the locking bolts. When adjusting the torsion spring force, the adjustment plate is rotated by a tool. When the adjustment plate is rotated into place, the locking bolts are screwed into the locking holes and the adjustment holes to lock the adjustment plate.

[0016] Preferably, a connecting plate is provided between the second hinge plates, and the second hinge plates are fixed to each other via the connecting plate and then fixed to the pressure vessel by welding.

[0017] By adopting the above technical solution, when in use, a connecting plate is set between the second hinge plates and is fixed to each other through the connecting plate and then welded to the pressure vessel, thereby enhancing the connection strength and stability between the second hinge plates, improving the structural reliability of the entire device, and making the manhole cover more stable and reliable during the opening and closing process.

[0018] Preferably, the manhole cover is provided with a fixing structure, which includes a plurality of first fixing frames provided on the manhole cover, the first fixing frames having grooves for fixing, a second fixing frame provided on the pressure vessel, and the second fixing frame provided with a fixing rod formed by two round rods fixed to each other, one end of the fixing rod is fixed in the second fixing frame, and the other end is provided between the two first fixing frames, and the end of the fixing rod provided on the first fixing frame is threadedly connected with a fixing bolt.

[0019] By adopting the above technical solution, the fixing structure provided on the manhole cover can effectively improve the stability of the manhole cover during use, preventing other external forces from causing the manhole cover to loosen or accidentally open. Specifically, the cooperation between the multiple first fixing frames and the second fixing frames allows the fixing rod to be firmly fixed between the second fixing frames, and then pass through the first fixing frames. The threaded connection of the fixing bolt prevents the fixing rod from falling off.

[0020] Preferably, a handle is provided on the manhole cover, and the handle makes it convenient for staff to open the manhole cover.

[0021] By adopting the above technical solution, when in use, providing a handle on the manhole cover can significantly improve the convenience of operation, allowing workers to open or close the manhole cover more easily, thereby improving work efficiency and safety.

[0022] In summary, this application has the following beneficial effects:

[0023] 1. This utility model is a manhole balancer with a simple structure. By arranging two hinge plates at the bottom of the manhole cover and torsion springs at both ends of the rotating shaft, the force of the torsion springs is balanced with the force required to open the manhole cover, thereby achieving easy opening and closing of the manhole cover and reducing the difficulty and labor intensity of operation.

[0024] 2. This utility model is a manhole balancer with a simple structure. The torsion spring can flexibly adjust the force of the torsion spring through the design of the adjustment plate and the adjustment hole, ensuring the smooth opening and closing of the manhole cover under different working conditions, thereby improving the flexibility and reliability of use.

[0025] 3. The utility model designs a manhole balancer with a simple structure. The locking hole and locking bolt provided on the second hinge plate can ensure that the torsion spring is locked after the force is adjusted, thereby avoiding other accidents caused by insufficient torsion spring force. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of an embodiment;

[0027] Figure 2 An enlarged schematic diagram showing an adjustment plate in the embodiment;

[0028] Figure 3 A schematic diagram showing the structure of an O-shaped rubber ring in the embodiment;

[0029] Explanation of the accompanying drawings: 1. Pressure vessel; 2. Manhole cover; 3. First hinge plate; 4. Rotating shaft; 5. Torsion spring; 6. Second hinge plate; 7. Adjustment plate; 8. Adjustment hole; 9. O-ring; 10. Locking hole; 11. Locking bolt; 12. Connecting plate; 13. Fixing structure; 131. First fixing frame; 132. Second fixing frame; 133. Fixing rod; 134. Fixing bolt; 14. Handle. DETAILED DESCRIPTION

[0030] The present invention will be described in further detail below with reference to the accompanying drawings. Like components are denoted by like reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "bottom," and "top" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0031] Example 1

[0032] The utility model discloses a manhole balancer with a simple structure. Figure 1 and Figure 2 As shown, the pressure vessel 1 includes a manhole cover 2 provided on one side of the pressure vessel 1. A first hinge plate 3 is provided at the bottom of the manhole cover 2. A rotating shaft 4 is provided on one side of the first hinge plate 3. The first hinge plate 3 is welded to the manhole cover 2 and the rotating shaft 4. A torsion spring 5 is provided at each end of the rotating shaft 4. A second hinge plate 6 is provided at the end of the torsion spring 5 that is away from each other. The second hinge plate 6 is connected to the pressure vessel 1. The torsion spring 5 applies a force to the manhole cover 2, balancing the force of the torsion spring 5 and the force required to open the manhole cover 2. This simplifies the structure, reduces costs, and improves safety and reliability.

[0033] An adjustment plate 7 is provided on the side of the torsion spring 5 away from the rotating shaft 4. The main function of the adjustment plate 7 is to adjust the force applied by the torsion spring 5 to the manhole cover 2 according to the weight and size of the manhole cover 2, so that the manhole cover 2 can be opened with less effort. A plurality of adjustment holes 8 are provided on the adjustment plate 7. The torsion spring 5 has two force rods, one of which abuts against the first hinge plate 3 and the other is inserted into the adjustment hole 8. The second hinge plate 6 is provided with two locking holes 10, which are used to thread locking bolts 11. When adjusting the force of the torsion spring 5, the adjustment plate 7 is rotated with a tool. When the adjustment plate 7 is rotated into place, the locking bolts 11 are screwed into the locking holes 10 and the adjustment hole 8 to lock the adjustment plate 7. Two locking holes 10 are provided. When the force rod of the torsion spring 5 is rotated to the position of one of the locking holes 10, the adjustment plate 7 can be locked through the other locking hole 10. A connecting plate 12 is provided between the second hinge plates 6. The second hinge plates 6 are fixed to each other through the connecting plate 12 and then fixed to the pressure vessel 1 by welding. The main function of the connecting plate 12 is to connect the two second hinge plates 6 to keep the second hinge plates 6 stable.

[0034] The manhole cover 2 is provided with a fixing structure 13, which includes a plurality of first fixing frames 131 provided on the manhole cover 2, a groove being provided in the middle of the first fixing frame 131, a second fixing frame 132 being provided on the pressure vessel 1, the second fixing frame 132 being cylindrical and being fixedly connected to the pressure vessel 1, a fixing rod 133 formed by two round rods fixedly connected to each other is provided on the second fixing frame 132, the fixing rod 133 being T-shaped, the two ends of the fixing rod 133 being sleeved between the two second fixing frames 132, and the other end being placed In the groove of the first fixing frame 131, the end of the fixing rod 133 set on the first fixing frame 131 is threadedly connected with a fixing bolt 134. After the end of the fixing rod 133 is placed in the groove, the fixing bolt 134 is used to threadably connect with the end of the fixing rod 133. The first fixing frame 131 and the second fixing frame 132 are respectively set at multiple positions of the manhole cover 2 and the pressure vessel 1. After the fixing bolt 134 is fixed, the fixing rod 133 cannot move along the direction of the rod length, thereby fixing the manhole cover 2.

[0035] The manhole cover 2 is also provided with a handle 14, which makes it convenient for the staff to open the manhole cover 2. The handle 14 can be made of metal, which has a good grip and durability. The design of the handle 14 can be diversified, such as a straight handle type, an arc handle type, etc., to meet the needs of different operators.

[0036] Working Principle: This utility model features a simple manhole balancer. By rationally designing the structure of the manhole balancer, the elastic force of the torsion spring 5 is balanced with the force required to open the manhole cover 2, enabling easy opening and closing of the manhole cover 2, allowing workers to open the manhole cover 2 with less effort. This design not only simplifies the structure and reduces costs, but also improves operational safety and reliability.

[0037] Example 2

[0038] like Figure 3 As shown, the difference between this embodiment and the above embodiment is that: in order to prevent the boosting rod from falling off, an O-shaped rubber ring 9 is provided on the boosting rod in which the torsion spring 5 is inserted into the adjustment hole 8. The O-shaped rubber ring 9 has good wear resistance and sealing properties, and can effectively increase the friction between the torsion spring 5 and the adjustment hole 8, making the boosting rod more stable.

[0039] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A manhole balancer with a simple structure, characterized by: The invention comprises a pressure vessel (1), a manhole cover (2) is provided on one side of the pressure vessel (1), a first hinge plate (3) is provided at the bottom of the manhole cover (2), a rotating shaft (4) is provided on one side of the first hinge plate (3), torsion springs (5) are provided at both ends of the rotating shaft (4), a second hinge plate (6) is provided at one end of the torsion spring (5) away from each other, the second hinge plate (6) is connected to the pressure vessel (1), and the torsion spring (5) applies force to the manhole cover (2) so that the force of the torsion spring (5) and the force required to open the manhole cover (2) are balanced.

2. A manhole balancer with a simple structure according to claim 1, characterized in that: The first hinge plate (3) is fixed to the manhole cover (2) and the rotating shaft (4) respectively by welding.

3. A manhole balancer with a simple structure according to claim 1, characterized in that: An adjustment plate (7) is provided on the side of the torsion spring (5) away from the rotating shaft (4), and a plurality of adjustment holes (8) are opened on the adjustment plate (7). The torsion spring (5) has two force rods, one of which is abutted against the first hinge plate (3) and the other is inserted into the adjustment hole (8).

4. A manhole balancer with a simple structure according to claim 1, characterized in that: The torsion spring (5) is inserted into the force-adding rod in the adjustment hole (8) and is sleeved with an O-shaped rubber ring (9). The O-shaped rubber ring (9) is used to increase the friction between the torsion spring (5) and the adjustment hole (8), so that the force-adding rod is not easy to fall off.

5. A manhole balancer with a simple structure according to claim 1, characterized in that: The second hinge plate (6) is provided with two locking holes (10), and the locking holes (10) are used for threaded connection of locking bolts (11).

6. A manhole balancer with a simple structure according to claim 1, characterized in that: A connecting plate (12) is provided between the second hinge plates (6), and the second hinge plates (6) are fixed to each other via the connecting plate (12) and then fixed to the pressure vessel (1) by welding.

7. The manhole balancer with a simple structure according to claim 1, characterized in that: The manhole cover (2) is provided with a fixing structure (13), the fixing structure (13) comprising a plurality of first fixing frames (131) provided on the manhole cover (2), the first fixing frames (131) having grooves for fixing, a second fixing frame (132) provided on the pressure vessel (1), a fixing rod (133) formed by two round rods fixedly connected to each other provided on the second fixing frame (132), one end of the fixing rod (133) being fixed in the second fixing frame (132), and the other end being provided between the two first fixing frames (131), and the end of the fixing rod (133) provided on the first fixing frame (131) being threadedly connected with a fixing bolt (134).

8. The manhole balancer with a simple structure according to claim 1, characterized in that: The manhole cover (2) is provided with a handle (14), and the handle (14) facilitates the staff to open the manhole cover (2).

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