Inspection well cover opening device

Abstract

The invention discloses an inspection well lid opening device, and relates to the technical field of well lids, and the inspection well lid opening device is technically characterized by comprising a hook part, a plurality of vertical grooves are formed in the hook part, a movable rod is slidably connected to the hook part, a plurality of hinge parts are arranged on the movable rod, and clamping rods are rotatably connected to the hinge parts; a second spring is installed on the side wall between the clamping rod and the movable rod, limiting blocks are fixedly connected to the bottom side walls of the multiple vertical grooves correspondingly, a containing cavity is formed in the hook piece, one end of the movable rod extends into the containing cavity, a third rotating rod is rotationally connected to the side wall of the containing cavity, and the third rotating rod is rotationally connected to the side wall of the third rotating rod. A third rotating rod is fixedly connected with a gear, the gear is connected with a toothed plate in an engaged mode, the hook piece can be rapidly inserted into a well lid hole and limited, the component is effectively prevented from being separated from a well lid, and the hook piece is rapidly separated from the well lid when the well lid is placed.

Description

Technical Field

[0001] The present invention relates to the technical field of manhole covers, and more particularly to a manhole cover opening device. Background Art

[0002] In recent years, with the unprecedented development of urban construction and the continuous laying of lines such as telecommunications, electricity, water supply and drainage pipelines, the use of manholes has been increasing. In order to be firm and anti-theft, manhole covers are made with heavy quality and installed tightly. Due to the large self-weight of the manhole cover, when it is rolled over by heavy vehicles during temporary traffic, it fits tightly with the wellbore. When the pipeline needs to be maintained or an emergency occurs and the manhole cover needs to be opened, it is often impossible to open it immediately, and the work plan cannot be carried out on time, seriously affecting work efficiency, so an opening device is needed.

[0003] In order to facilitate the staff to open the manhole cover and prevent the influence of the raised surface of the manhole cover on pedestrians. An opening hole is provided on the surface of the existing manhole cover, and the opening hole penetrates through the manhole cover. When the staff needs to open the manhole cover, a pull rod or the like is used to extend into the wellbore from the opening hole to hook and lift the manhole cover. However, due to safety considerations, the diameter of the opening hole is relatively short, and the hook is not easy to insert. When the hook is inserted into the opening hole and hooks the manhole cover, since the hook cannot clamp the manhole cover, the hook is easily slipped out of the opening hole during the opening process of the manhole cover, resulting in the failure of opening the manhole cover, and it may also damage the manhole cover. Therefore, in order to solve the above technical problems, the present invention provides a manhole cover opening device. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides a manhole cover opening device that can easily insert the hook member into the hole and limit its position, effectively preventing the hook member from detaching from the manhole cover.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solution: A manhole cover opening device, including a hook member, a plurality of vertical grooves are provided on the hook member, a movable rod is slidably connected to the hook member, a plurality of hinge members are provided on the movable rod, and a clamping rod is rotatably connected to each of the plurality of hinge members. A second spring is installed on the side wall between the clamping rod and the movable rod. A limiting block is fixedly connected to the bottom side wall of each of the plurality of vertical grooves. A receiving cavity is provided on the hook member. One end of the movable rod extends into the receiving cavity. A third rotating rod is rotatably connected to the side wall of the receiving cavity. A gear is fixedly connected to the third rotating rod. The gear is meshed with a rack. The bottom side wall of the rack is fixedly connected with a pressing rod. The pressing rod slides up and down in the receiving cavity through a sliding member. A plurality of gear grooves are provided on the movable rod. The plurality of gear grooves are arranged vertically and equidistantly. The plurality of gear grooves are meshed with the gear. A connecting rope is provided at the upper end of the hook member. One end of the connecting rope is provided with a lever, and a rotating bracket is provided on the lever.

[0008] Preferably: The sliding member includes two limiting grooves, the two limiting grooves are oppositely arranged on the receiving cavity, and a connecting block is slidably connected to each of the two limiting grooves. The two connecting blocks are fixedly connected to the side wall of the pressing rod.

[0009] Preferably: Connecting rings are provided at both ends of the connecting rope, and the two connecting rings are respectively fixedly connected to the upper end of the hook member and one end of the lever.

[0010] Preferably: The rotating bracket includes a fixed base, a base rod, two mounting plates and a connecting sleeve. The fixed base and the two mounting plates are respectively located at both ends of the base rod. A first placing groove is provided on the fixed base. A rotating groove is provided on the first placing groove. Two rotating sliders are provided in the rotating groove. The two rotating sliders are fixedly connected to the side wall of the base rod. The two mounting plates are arranged in an L shape. A first rotating rod is rotatably connected to the side wall between the two mounting plates. Opposite side walls of the two first rotating rods are fixedly connected to the side wall of the connecting sleeve. The lever is slidably arranged in the connecting sleeve, and a fixing structure is provided on the connecting sleeve.

[0011] Preferably: The fixing structure includes a second placing groove, the second placing groove is provided on the connecting sleeve, a second rotating rod is rotatably connected to the side wall of the second placing groove, a rotating plate is fixedly connected to the second rotating rod, a locking block is fixedly connected to the bottom side wall of the rotating plate, a first spring is fixedly connected to the upper side wall of the rotating plate, and one end of the first spring is fixedly connected to the upper side wall of the second placing groove. A plurality of locking grooves are provided on the lever. The plurality of locking grooves are arranged horizontally and equidistantly.

[0012] Preferably: The left side wall and the right side wall of the locking block are both inclined.

[0013] Preferably, a ball groove is provided on the bottom side wall of the placement groove 1, the ball groove is arranged in a ring shape, a plurality of balls are arranged in the ball groove, and the plurality of balls are in contact with the bottom side wall of the base rod.

[0014] Preferably, the lever is a telescopic rod with adjustable length, and the lever is made of metal.

[0015] Preferably, the plurality of vertical grooves are arranged in a ring array, and the plurality of clamping rods are arranged in a ring array.

[0016] Preferably, the connecting piece is composed of two plates and a round rod, the two plates are fixedly connected to the movable rod, the round rod is fixedly connected between the two plates, and the clamping rod is rotatably connected to the round rod.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides a manhole cover opening device, which has the following beneficial effects:

[0019] 1. By arranging a movable rod on the hook, a plurality of clamping rods and a second spring are arranged on the movable rod, each second spring is located in a vertical groove, and a limit block is arranged at the bottom end of the vertical groove. When the hook is inserted into the hole of the manhole cover, the clamping rod can be squeezed into the vertical groove by the wall of the manhole cover. After the hook is fully inserted into the hole of the manhole cover, the plurality of clamping rods are spread open by the elastic force of the second spring, so as to play a role of limiting, thereby preventing the hook from being separated from the manhole cover when the manhole cover is pulled up;

[0020] 2. By setting a component to push the hook out of the hole of the manhole cover, when the manhole cover is placed on the ground, the extrusion rod is squeezed and moves upward, the tooth plate moves up with the extrusion rod, and the tooth plate rotates with the gear, thereby causing multiple gear grooves to move downward, thereby causing the movable rod to move downward. Similarly, under the squeezing of the limit block, the clamping rod is again received into the vertical groove. Without the restriction of the clamping rod, the hook is squeezed out of the hole of the manhole cover, and the operator does not need to operate again, which is more convenient for the placement of the manhole cover;

[0021] 3. By setting a rotating bracket for adjusting the direction of the hook, the base rod can rotate in the placement slot through the action of the rotating slot and the rotating slider. After the manhole cover is pulled up, the lever is rotated horizontally to open the manhole cover from the pipe opening without the need for operators to move it, further reducing the workload of operators;

[0022] 4. Through the setting of the fixed structure, the lever can be fixed after the left and right lengths of the lever are adjusted. The setting of the first spring can press the rotating plate to rotate downward, thereby pressing the lock block into the lock groove. When the lever is rotated left and right, the lock groove can rotate left and right to push the lock block upward. Without the restriction of the lock block, the position of the lever can be adjusted back and forth so that the hook member can be adjusted above the manhole cover hole.

[0023] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and to be implemented in accordance with the content of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the drawings. The specific implementation manners of the present invention are given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and form a part of this application. The schematic 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:

[0025] Figure 1 is a schematic three-dimensional structure diagram of the present invention;

[0026] Figure 2 is a schematic front sectional structure diagram of the present invention;

[0027] Figure 3 is a schematic side sectional structure diagram of the present invention;

[0028] Figure 4 is an enlarged partial structure diagram of A of the present invention;

[0029] Figure 5 is an enlarged partial structure diagram of B of the present invention;

[0030] Figure 6 is a schematic three-dimensional structure diagram of the accommodation cavity in the present invention;

[0031] Figure 7 is a schematic first top sectional view of the hook member in the present invention;

[0032] Figure 8 is a schematic structural diagram of the second top sectional view of the component in the present invention;

[0033] Figure 9 is a schematic top sectional view of the fixed seat in the present invention.

[0034] In the figure:

[0035] 1. Fixed base; 101. First placement groove; 102. Rotation groove; 103. Rotation slider; 104. Ball groove; 105. Ball; 2. Base rod; 3. Mounting plate; 301. First rotating rod; 4. Connecting sleeve; 401. Second placement groove; 402. Second rotating rod; 403. Rotating plate; 404. First spring; 405. Locking block; 5. Lever; 501. Locking groove; 6. Connecting rope; 7. Hook member; 701. Movable rod; 702. Vertical groove; 703. Clamping rod; 704. Second spring; 705. Limiting block; 706. Accommodation cavity; 707. Gear groove; 708. Third rotating rod; 709. Gear; 710. Toothed plate; 711. Extrusion rod; 8. Connecting block; 9. Limiting groove; 10. Connecting ring. Detailed implementation mode

[0036] The principles and features of the present invention will be described below in conjunction with the attached drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention. In the following paragraphs, the present invention will be described more specifically by way of example with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of conveniently and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0037] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0039] Embodiment 1:

[0040] Please combine Figures 1 to 9As shown in the figure, the present invention provides a manhole cover opening device. A manhole cover opening device includes a hook member 7. A plurality of vertical grooves 702 are formed in the hook member 7. A movable rod 701 is slidably connected to the hook member 7. A plurality of hinge members are provided on the movable rod 701. Clamping rods 703 are rotatably connected to the plurality of hinge members. A second spring 704 is installed on the side wall between the clamping rod 703 and the movable rod 701. Limit blocks 705 are fixedly connected to the bottom side walls of the plurality of vertical grooves 702. A receiving cavity 706 is formed in the hook member 7. One end of the movable rod 701 extends into the receiving cavity 706. A third rotating rod 708 is rotatably connected to the side wall of the receiving cavity 706. A gear 709 is fixedly connected to the third rotating rod 708. The gear 709 is meshed with a toothed plate 710. A pressing rod 711 is fixedly connected to the bottom side wall of the toothed plate 710. The pressing rod 711 slides up and down in the receiving cavity 706 through a sliding member. A plurality of gear grooves 707 are formed in the movable rod 701. The plurality of gear grooves 707 are arranged vertically and equidistantly. The plurality of gear grooves 707 are meshed with the gear 709. A connecting rope 6 is provided at the upper end of the hook member 7. One end of the connecting rope 6 is provided with a lever 5. A rotating bracket is provided on the lever 5;

[0041] When in use, the hook member 7 is directly inserted into the hole on the manhole cover. Under the extrusion of the inner wall of the hole, the unfolded clamping rods 703 will rotate inward simultaneously, and the second spring 704 is forced to compress. When the clamping rods 703 are completely inserted into the manhole cover hole, under the elastic force of the second spring 704, the plurality of clamping rods 703 will expand outward, and the clamping rods 703 abut against the side walls around the manhole cover hole, so as to play a limiting role and prevent the hook member 7 from separating from the manhole cover hole when opening the cover. Then, under the position limitation of the limit block 705, when the manhole cover is lifted, the gravity of the manhole cover will not press the clamping rod 703 to continue moving downward. When the manhole cover is placed on the ground, the pressing rod 711 contacts the ground first. The gravity of the manhole cover has a downward pressing force on the pressing rod 711, causing the pressing rod 711 to move upward. While the pressing rod 711 moves upward, it drives the toothed plate 710 to move, so that the gear 709 meshed with the toothed plate 710 rotates. Further, under the action of the gear groove 707, the movable rod 701 is driven to move downward. The downward movement of the movable rod 701 drives the clamping rod 703 to move together. The clamping rod 703 moves closer to the movable rod 701 under the extrusion of the side wall of the limit block 705, so that the clamping rod 703 is received into the vertical groove 702. Without the restriction of the clamping rod 703, the hook member 7 will move out of the manhole cover hole, and the manhole cover will directly fall off.

[0042] On the basis of Embodiment 1, the solution in Embodiment 1 is further refined and introduced in combination with the following specific working methods. For details, see the following description.

[0043] Embodiment 2:

[0044] The rotating bracket includes a fixed base 1, a base rod 2, two mounting plates 3 and a connecting sleeve 4. The fixed base 1 and the two mounting plates 3 are respectively located at both ends of the base rod 2. A first placement groove 101 is formed on the fixed base 1, and a rotating groove 102 is formed on the first placement groove 101. Two rotating sliders 103 are arranged in the rotating groove 102, and the two rotating sliders 103 are fixedly connected to the side wall of the base rod 2. The two mounting plates 3 are arranged in an L shape, and a first rotating rod 301 is rotatably connected to the side walls between the two mounting plates 3. The opposite side walls of the two first rotating rods 301 are fixedly connected to the side wall of the connecting sleeve 4. The lever 5 is slidably arranged in the connecting sleeve 4, and a fixing structure is provided on the connecting sleeve 4;

[0045] The setting of the rotating bracket serves the function of using the rotating bracket as a rotation fulcrum for the lever 5 to open the manhole cover. By pressing down on the lever 5 at one end of the principle hook member 7, the manhole cover can be lifted with a very small force. Since the base rod 2 is rotatably connected to the fixed base 1 through the rotating sliders 103, after the manhole cover is lifted, the lever 5 can be rotated, so that the manhole cover can be rotated to one side of the pipeline, and there is no need to use manual handling anymore.

[0046] Embodiment Three:

[0047] The fixing structure includes a second placement groove 401 formed on the connecting sleeve 4. A second rotating rod 402 is rotatably connected to the side wall of the second placement groove 401. A rotating plate 403 is fixedly connected to the second rotating rod 402. A locking block 405 is fixedly connected to the bottom side wall of the rotating plate 403. A first spring 404 is fixedly connected to the upper side wall of the rotating plate 403. One end of the first spring 404 is fixedly connected to the upper side wall of the second placement groove 401. A plurality of locking grooves 501 are formed on the lever 5, and the plurality of locking grooves 501 are arranged horizontally and equidistantly. The left and right side walls of the locking block 405 are both inclined.

[0048] By rotating the lever 5 clockwise or counterclockwise, the side walls of the locking block 405 are subjected to the extrusion force of the side walls of the rotating locking grooves 501, so that the locking block 405 moves upward and moves out of the locking groove 501. At this time, the lever 5 can be moved back and forth to adjust the lengths of the levers 5 on both sides of the connecting sleeve 4, and further move the hook member 7 above the manhole cover hole. Moreover, such an adjustment method can also adjust the force used for opening the cover later. The longer the length of the lever 5 away from the hook member 7, the more labor-saving. When fixing the lever 5, rotate the locking groove 501 below the locking block 405. The first spring 404 can push the rotating plate 403 downward, so as to press the locking block 405 in the locking groove 501, thereby preventing the lever 5 from sliding back and forth;

[0049] A ball groove 104 is formed on the bottom side wall of the placement groove 101. The ball groove 104 is arranged in a ring shape. A plurality of balls 105 are arranged in the ball groove 104. The plurality of balls 105 are in contact with the bottom side wall of the base rod 2. Since the balls 105 perform rolling motion rather than sliding rotation in the ball groove 104, the frictional resistance is greatly reduced, making the rotation of the base rod 2 smoother.

[0050] The above is only the preferred embodiment of the present invention, and does not impose any form of limitation on the present invention; any ordinary technician in the industry can smoothly implement the present invention according to the illustrations in the specification and the above description; however, any minor changes, modifications, and equivalent variations made by those skilled in the art within the scope of the technical solution of the present invention by using the technical content disclosed above are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications, and variations made to the above embodiments based on the essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A manhole cover opening device, comprising a hook (7), characterized in that: The hook member (7) is provided with a plurality of vertical grooves (702), a movable rod (701) is slidably connected to the hook member (7), the movable rod (701) is provided with a plurality of hinged members, a plurality of the intersection members are rotatably connected to a clamping rod (703), a second spring (704) is installed on the side wall between the clamping rod (703) and the movable rod (701), a limiting block (705) is fixedly connected to the bottom side wall of the plurality of vertical grooves (702), a receiving cavity (706) is provided on the hook member (7), one end of the movable rod (701) extends into the receiving cavity (706), and a third rotating rod (708) is rotatably connected to the side wall of the receiving cavity (706) The third rotating rod (708) is fixedly connected with a gear (709), and the gear (709) is meshedly connected with a toothed plate (710). The bottom side wall of the toothed plate (710) is fixedly connected with an extrusion rod (711), and the extrusion rod (711) slides up and down in the accommodating cavity (706) through a sliding member. The movable rod (701) is provided with a plurality of gear grooves (707), and the plurality of gear grooves (707) are arranged vertically and equidistantly. The plurality of gear grooves (707) are meshedly connected with the gear (709). A connecting rope (6) is provided at the upper end of the hook (7), and a lever (5) is provided at one end of the connecting rope (6), and a rotating bracket is provided on the lever (5).

2. A manhole cover opening device according to claim 1, characterized in that: The sliding member comprises two limiting grooves (9), the two limiting grooves (9) are arranged opposite to each other on the accommodating cavity (706), and connecting blocks (8) are slidably connected in the two limiting grooves (9), and the two connecting blocks (8) are fixedly connected to the side walls of the extrusion rod (711).

3. A manhole cover opening device according to claim 2, characterized in that: Both ends of the connecting rope (6) are provided with connecting rings (10), and the two connecting rings (10) are respectively fixedly connected to the upper end of the hook (7) and one end of the lever (5).

4. A manhole cover opening device according to claim 3, characterized in that: The rotating bracket comprises a fixed base (1), a base rod (2), two mounting plates (3) and a connecting sleeve (4); the fixed base (1) and the two mounting plates (3) are respectively located at two ends of the base rod (2); a placement groove (101) is provided on the fixed base (1); a rotation groove (102) is provided on the placement groove (101); two rotating sliders (103) are provided in the rotation groove (102); the two rotating sliders (103) are fixedly connected to the side wall of the base rod (2); the two mounting plates (3) are arranged in an L shape; a first rotating rod (301) is rotatably connected to the side wall between the two mounting plates (3); the two first rotating rods (301) are fixedly connected to the side wall of the connecting sleeve (4) opposite to the side wall; the lever (5) is slidably arranged in the connecting sleeve (4); and a fixing structure is provided on the connecting sleeve (4).

5. A manhole cover opening device according to claim 4, characterized in that: The fixing structure comprises a second placement groove (401), wherein the second placement groove (401) is provided on the connecting sleeve (4), a second rotating rod (402) is rotatably connected to the side wall of the second placement groove (401), a rotating plate (403) is fixedly connected to the second rotating rod (402), a locking block (405) is fixedly connected to the bottom side wall of the rotating plate (403), a first spring (404) is fixedly connected to the upper side wall of the rotating plate (403), one end of the first spring (404) is fixedly connected to the upper side wall of the second placement groove (401), and a plurality of locking grooves (501) are provided on the lever (5), and the plurality of locking grooves (501) are horizontally equidistantly arranged.

6. A manhole cover opening device according to claim 5, characterized in that: The left side wall and the right side wall of the locking block (405) are both arranged in an inclined shape.

7. A manhole cover opening device according to claim 6, characterized in that: A ball groove (104) is provided on the bottom side wall of the placement groove 1 (101), the ball groove (104) is arranged in an annular shape, a plurality of balls (105) are arranged in the ball groove (104), and the plurality of balls (105) are in contact with the bottom side wall of the base rod (2).

8. A manhole cover opening device according to claim 7, characterized in that: The lever (5) is a telescopic rod with adjustable length, and the lever (5) is made of metal.

9. A manhole cover opening device according to claim 8, characterized in that: The plurality of vertical grooves (702) are arranged in a ring array, and the plurality of clamping rods (703) are arranged in a ring array.

10. A manhole cover opening device according to claim 9, characterized in that: The connecting piece is composed of two plates and a round rod, the two plates are fixedly connected to the movable rod (701), the round rod is fixedly connected between the two plates, and the clamping rod (703) is rotatably connected to the round rod.

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