Self-locking manhole cover

Abstract

The utility model discloses a self-locking type manhole cover which comprises a ground assembly, a well mouth is formed in the ground assembly, sliding grooves distributed in a circumferential array mode are formed in the inner wall of the well mouth, all the sliding grooves are spirally formed, abutting sliding blocks are arranged in the sliding grooves in an inserted mode, and springs are connected between the abutting sliding blocks and the sliding grooves. The top of the abutting sliding block abuts against a well lid assembly so as to drive the well lid assembly to keep rotating descending, a spiral locking mechanism is arranged at the bottom of the well lid assembly in a protruding mode, a supporting block is arranged on the inner wall of the well mouth in a protruding mode, and a spiral groove corresponding to the spiral locking mechanism is formed in the inner wall of the supporting block so as to drive the well lid assembly to keep spiral locking. According to the self-locking type manhole cover, the sliding grooves are spirally formed in the inner wall of the manhole opening, so that the manhole cover presses the abutting sliding blocks downwards through gravity, the manhole cover synchronously rotates and descends along with the abutting sliding blocks, the spiral blocks are clamped in the spiral grooves to be locked, and the abutting sliding blocks can be buffered and reset through the springs.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover technology, and more specifically to a self-locking manhole cover. Background Technology

[0002] Manhole covers are used to cover deep wells on roads or in homes to prevent people or objects from falling in, and are generally round.

[0003] For example, patent CN220247159U discloses a self-locking manhole cover, including a cover body with a fixed ring movably sleeved on it. A support ring is fixedly installed on the lower side of the fixed ring, and the upper side of the support ring fits against the lower side of the cover body. Two sliding grooves are opened on the inner side wall of the fixed ring. The cover body pushes the inclined surfaces of two trapezoidal blocks, causing the two trapezoidal blocks to enter the two sliding grooves respectively. When the two cover bodies are in place, the two trapezoidal blocks will be horizontally aligned with the two slots, so that the pressure spring can drive the trapezoidal blocks into the slots. In this way, the trapezoidal blocks can be used to fix the cover body, thereby preventing the manhole cover from being lifted when the water in the sewer rushes upward. When it is necessary to remove the manhole cover, the two handles are rotated and moved in the direction that they are close to each other. The two movable plates can then drive the two small strips to move in the direction that they are far apart. The small strips can then press the moving strip, and the manhole cover can be lifted by using the handles.

[0004] In practice, most manhole covers are placed directly on the manhole opening and can be easily taken away, making them easy targets for theft and resulting in the loss of public property.

[0005] It is evident that the aforementioned problems with existing technologies urgently need to be addressed. Utility Model Content

[0006] In view of the above-mentioned problems in the existing technology, one objective of this utility model is to provide a self-locking manhole cover to solve the problems that most manhole covers are placed directly on the manhole opening, can be easily taken away, and are easily stolen.

[0007] To achieve the above objectives, this utility model provides a self-locking manhole cover, comprising a ground assembly with a manhole opening. The inner wall of the manhole opening has grooves arranged in a circular array, each groove spirally oriented. A sliding block is inserted into each groove, and a spring connects the sliding block to the groove. The top of the sliding block abuts against a manhole cover assembly, driving the manhole cover assembly to rotate and descend. A spiral locking mechanism protrudes from the bottom of the manhole cover assembly, and a support block protrudes from the inner wall of the manhole opening. The inner wall of the support block has a spiral groove corresponding to the spiral locking mechanism, driving the manhole cover assembly to remain spirally locked.

[0008] Preferably, the manhole cover assembly includes a manhole cover with a "T"-shaped side profile, and the bottom of the protruding end of the manhole cover is configured as an abutment surface.

[0009] Preferably, the spiral locking mechanism specifically includes a ring-shaped protrusion disposed at the bottom of the abutment surface, and the inner wall of the protrusion is provided with a spiral block.

[0010] Preferably, the ground assembly includes the ground, the wellhead is opened on the outer wall of the ground, and the spring force is less than the weight of the well cover assembly.

[0011] Preferably, the support block forms a "U" shape with the inner wall of the wellhead, and the position of the protrusion corresponds to the "U" shaped groove formed by the support block and the inner wall of the wellhead.

[0012] Preferably, the spiral groove is specifically formed on the inner wall of the "U" shape formed by the support block and the inner wall of the wellhead, and corresponds to the spiral block.

[0013] Preferably, the top of the manhole cover has a slot.

[0014] Beneficial effects:

[0015] Compared with the prior art, the self-locking manhole cover provided by this utility model has the following beneficial effects:

[0016] 1. The spiral grooves on the inner wall of the wellhead allow the sliding blocks inside to rotate and descend under pressure. This causes the top cover to press down on the sliding blocks under gravity, resulting in synchronous rotation and descent of the sliding blocks. The springs inside the grooves provide cushioning, allowing the sliding blocks to reset.

[0017] 2. The spiral block on the inner wall of the bottom protrusion of the manhole cover and the spiral groove on the inner wall of the support block are kept in correspondence. When the manhole cover is rotated and lowered, the spiral block can be locked inside the spiral groove, so that the manhole cover cannot be pulled out directly, thus achieving the purpose of locking. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the structure of a self-locking manhole cover provided in an embodiment of the present utility model;

[0020] Figure 2This is a structural schematic diagram of a front view cross-section of a self-locking manhole cover provided in an embodiment of the present utility model;

[0021] Figure 3 A schematic diagram of the structure of the ground component provided in an embodiment of this utility model.

[0022] Key reference numerals:

[0023] 1. Manhole cover assembly; 2. Ground assembly; 101. Manhole cover; 102. Abutment surface; 103. Protrusion; 104. Spiral block; 201. Ground; 202. Manhole opening; 203. Slide groove; 204. Abutment slider; 205. Support block; 206. Spiral groove. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] like Figure 1-3 As shown, a self-locking manhole cover includes a ground component 2, on which a manhole opening 202 is provided. The inner wall of the manhole opening 202 has grooves 203 arranged in a circular array, each groove 203 being spirally oriented. An abutment slider 204 is inserted into the groove 203, and a spring connects the abutment slider 204 and the groove 203. The top of the abutment slider 204 abuts against a manhole cover component 1, driving the manhole cover component 1 to rotate and descend. A spiral locking mechanism protrudes from the bottom of the manhole cover component 1. A support block 205 protrudes from the inner wall of the manhole opening 202, and a spiral groove 206 corresponding to the spiral locking mechanism is provided on the inner wall of the support block 205 to drive the manhole cover component 1 to remain spirally locked.

[0026] The main purpose of this self-locking manhole cover is to allow the sliding blocks 204 inside the manhole 101 to rotate and descend under pressure through the spiral grooves 203 on the inner wall of the manhole 102. This allows the top of the manhole cover 101 to press down on the sliding blocks 204 under gravity, thus causing the sliding blocks 204 to rotate and descend synchronously. The springs inside the grooves 203 provide cushioning, allowing the sliding blocks 204 to reset. Furthermore, the spiral blocks 104 on the inner wall of the bottom protrusion 103 of the manhole cover 101 and the spiral grooves 206 on the inner wall of the support block 205 are aligned, so that when the manhole cover 101 rotates and descends, the spiral blocks 104 can engage inside the spiral grooves 206, preventing the manhole cover 101 from being pulled out directly, thus achieving a locking effect.

[0027] In the technical solution provided by this utility model, by Figure 1 , Figure 2 and Figure 3It is known that the manhole cover assembly 1 includes a manhole cover 101 with a "T"-shaped side profile, and the bottom of the protruding end of the manhole cover 101 is set as an abutment surface 102 for abutting the top of each abutment slider 204 to support the manhole cover 101, so that the manhole cover 101 rotates and slides down as each abutment slider 204 rotates and slides down.

[0028] Furthermore, the spiral locking mechanism specifically includes a ring-shaped protrusion 103 located at the bottom of the contact surface 102, and a spiral block 104 is provided on the inner wall of the protrusion 103. As the manhole cover 101 rotates and slides down with the rotation of each contact slider 204, the spiral block 104 can slide into the spiral groove 206, thereby achieving the locking effect.

[0029] Furthermore, the ground component 2 includes a ground surface 201, and a manhole 202 is opened on the outer wall of the ground surface 201. The spring force is less than the weight of the manhole cover component 1, so that when the manhole cover 101 is placed on each abutting slider 204, the spring can be driven to contract, causing the abutting slider 204 to slide along the slide groove 203. The spring's rebound force can also reset the top of the abutting slider 204 to the top of the slide groove 203 when the top of the abutting slider 204 is not pressed down by the manhole cover 101.

[0030] Furthermore, the support block 205 and the inner wall of the well opening 202 form a "U" shape, and the position of the protrusion 103 corresponds to the groove of the "U" shape formed by the support block 205 and the inner wall of the well opening 202, so that the protrusion 103 can be locked and fixed during the rotation and locking process of the well cover 101 to avoid displacement.

[0031] Furthermore, the spiral groove 206 is specifically formed on the inner wall of the "U" shape formed by the inner wall of the support block 205 and the wellhead 202, and corresponds to the spiral block 104, so that the spiral block 104 can be inserted into the spiral groove 206 for locking.

[0032] Furthermore, the top of the manhole cover 101 is provided with a slot, so that when workers need to open the manhole cover 101, they can use tools such as shovels to insert into the slot and rotate to open the manhole opening 202.

[0033] Working principle: After the staff has finished inspecting the wellhead 202, they only need to place the well cover 101 directly in front of the wellhead 202 so that the contact surface 102 can contact each contact slider 204.

[0034] This allows each abutting slider 204 to be pressed down by the weight of the manhole cover 101 and rotate and slide down along the slide groove 203, thereby causing the manhole cover 101 to also rotate and slide down.

[0035] This causes the spiral block 104 to spirally engage along the spiral groove 206, thereby achieving a locking effect on the manhole cover 101;

[0036] When workers need to open the manhole 202 for inspection, they only need to use tools such as shovels to insert into the slots opened on the top of the manhole cover 101 and then rotate it to open the manhole cover 101.

[0037] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A self-locking manhole cover, characterized in that, The device includes a ground assembly (2), on which a wellhead (202) is provided. The inner wall of the wellhead (202) is provided with grooves (203) arranged in a circular array. Each groove (203) is spirally arranged. An abutting slider (204) is inserted into the groove (203). A spring is provided between the abutting slider (204) and the groove (203). A well cover assembly (1) is abutted against the top of the abutting slider (204) to drive the well cover assembly (1) to rotate and descend. A spiral locking mechanism is provided at the bottom of the well cover assembly (1). A support block (205) is provided on the inner wall of the wellhead (202). A spiral groove (206) is provided on the inner wall of the support block (205) corresponding to the spiral locking mechanism to drive the well cover assembly (1) to remain spirally locked.

2. The self-locking manhole cover according to claim 1, characterized in that, The manhole cover assembly (1) includes a manhole cover (101) with a "T"-shaped side profile, and the bottom of the protruding end of the manhole cover (101) is configured as an abutment surface (102).

3. The self-locking manhole cover according to claim 2, characterized in that, The spiral locking mechanism specifically includes a ring-shaped protrusion (103) disposed at the bottom of the abutment surface (102), and a spiral block (104) is disposed on the inner wall of the protrusion (103).

4. The self-locking manhole cover according to claim 1, characterized in that, The ground assembly (2) includes a ground surface (201), the wellhead (202) is opened on the outer wall of the ground surface (201), and the spring force is less than the weight of the well cover assembly (1).

5. The self-locking manhole cover according to claim 3, characterized in that, The support block (205) forms a "U" shape with the inner wall of the wellhead (202), and the position of the protrusion (103) corresponds to the "U" shaped groove formed by the support block (205) and the inner wall of the wellhead (202).

6. The self-locking manhole cover according to claim 5, characterized in that, The spiral groove (206) is specifically formed on the inner wall of the "U" shape formed by the inner wall of the support block (205) and the wellhead (202), and corresponds to the spiral block (104).

7. The self-locking manhole cover according to claim 2, characterized in that, The top of the manhole cover (101) is provided with a slot.

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