Anti-theft inspection well cover

Abstract

The utility model discloses an anti-theft inspection well cover which comprises a well column and an inspection well cover body arranged on the well column, a bolt is arranged in a groove hole in the center of the inspection well cover body, a special-shaped groove is formed in the inclined face of the lower end of the bolt, an L-shaped through groove penetrating through an inspection well cover body is formed in the middle of the inspection well cover body, and an L-shaped sliding rod is arranged in the L-shaped through groove in a sliding mode. Linkage assemblies are arranged at the two ends of the upper end face of the well column. When the inspection well cover is pressed downwards, the linkage assemblies are driven to push the L-shaped sliding rods to be inserted into the special-shaped grooves. When the inspection well cover is pressed downwards, the linkage assembly is driven to push the L-shaped sliding rod to be inserted into the special-shaped groove, the rack b can be inserted into the inspection well cover, meanwhile, the L-shaped sliding rod is inserted into the special-shaped groove, double locking is achieved, the safety of the well cover is improved, the polygonal groove holes are formed in the bolts, non-workers are prevented from opening the well cover arbitrarily, and the safety of the inspection well cover is improved. And the economic loss caused by theft of the well lid is reduced.

Description

Technical Field

[0001] The utility model relates to the field of manhole cover production, in particular to an anti-theft manhole cover. Background Art

[0002] With the acceleration of my country's economic development, the construction of public facilities in cities has also accelerated, and public facilities in cities need to install manhole covers, which provides a good development prospect and broad market consumption for the development of the manhole cover industry. However, most of the existing manhole covers are concrete manhole covers and iron manhole covers, and iron manhole covers have a certain recycling value, which has attracted the attention of criminals.

[0003] In a comparative document of a drainage manhole cover proposed with publication number CN217174928U, it is specifically proposed that "it includes a manhole cover body, one end of the manhole cover body is hinged with a mounting platform, and a locking assembly is arranged in the mounting platform; two sliders in the locking assembly slide on the screw rod, and the internal threads of the two sliders are opposite; the two sliders are hinged with an insert on one side close to the center of the mounting platform; the insert is placed on the bottom surface of the through hole of the mounting platform, and a groove is arranged on the manhole cover body facing the through hole, and the groove and the lower bottom surface of the through hole are located in the same plane."

[0004] The above-mentioned comparative document also has the following defects: the purpose of locking the manhole cover is achieved by rotating the screw to bring the two sliders closer together and driving the insert to insert into the through hole to fix it. However, the inventors found that the locking effect of the manhole cover in the device is not good. On this basis, we proposed an anti-theft manhole cover. Utility Model Content

[0005] The purpose of the utility model is to provide an anti-theft manhole cover to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A theft-proof manhole cover comprises a manhole column and a manhole cover arranged on the manhole column, a bolt is arranged in a slot hole at the center of the manhole cover, a special-shaped slot is arranged on the inclined surface of the lower end of the bolt, an L-shaped through slot penetrating the manhole cover body is arranged in the middle of the manhole cover, an L-shaped slide bar is slidably arranged in the L-shaped through slot, linkage components are arranged at both ends of the upper end surface of the manhole column, and when the manhole cover is pressed down, the linkage component is driven to push the L-shaped slide bar into the special-shaped slot.

[0008] Preferably, the linkage assembly includes a cavity body arranged on the well column, a gear rotatably arranged in the cavity body, a rack a and a rack b respectively meshing with the gear, and a return spring fixedly arranged at the lower end of the rack a.

[0009] As a preference, a slide groove a is provided at the upper end of the inner wall of the cavity, a slide groove b is provided at the right end face of the inner wall of the cavity, the rack a is slidably set on the slide groove a, and the rack b is slidably set on the slide groove b.

[0010] As a preference, the slotted hole is provided with an internal thread corresponding to the external thread of the bolt.

[0011] As a preference, the end of the L-shaped sliding rod close to the bolt is provided with a trapezoidal inclined surface, and the trapezoidal inclined surface matches the special-shaped groove.

[0012] As another preferred embodiment, a polygonal slot is provided on the upper end surface of the bolt.

[0013] Beneficial effects of the utility model:

[0014] The utility model discloses that when the manhole cover is pressed down, the linkage assembly is driven to push the L-shaped slide bar into the special-shaped groove, so that the rack b can be inserted into the manhole cover, and at the same time, the L-shaped slide bar is inserted into the special-shaped groove, which is double locked and increases the safety of the manhole cover. A polygonal slot hole is arranged on the bolt to prevent non-staff from opening the manhole cover without authorization, thereby reducing the economic loss caused by the theft of the manhole cover.

[0015] In summary, the device has the advantages of high anti-theft performance and convenient operation, and is particularly suitable for the field of manhole cover production technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the axonometric structure proposed by the utility model.

[0018] Figure 2 This is a schematic cross-sectional view of the structure of the utility model.

[0019] Figure 3 This is a schematic diagram of the enlarged structure of part A proposed by the utility model.

[0020] Figure 4 This is a schematic cross-sectional view of the structure of the utility model.

[0021] Figure 5 This is a schematic diagram of the enlarged structure of part B proposed by the utility model.

[0022] Figure 6 This is a schematic diagram of the bolt axonometric structure proposed by the utility model.

[0023] In the figure: 1-well column; 2-manhole cover; 3-slot hole; 4-bolt; 5-inclined surface; 6-special-shaped groove; 7-L-type through groove; 8-L-type slide rod; 9-linkage assembly; 41-polygonal slot hole; 81-trapezoidal inclined surface; 91-hollow cavity; 92-gear; 93-rack a; 94-rack b; 95-reset spring; 96-slide a; 97-slide b. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Embodiment 1

[0026] Reference Figure 1-6 A theft-proof manhole cover, wherein a bolt 4 is arranged in a slot hole 3 at the center of the manhole cover 2, a special-shaped slot 6 is arranged on the inclined surface 5 at the lower end of the bolt 4, an L-shaped through slot 7 penetrating the main body of the manhole cover 2 is arranged in the middle of the manhole cover 2, an L-shaped slide bar 8 is slidably arranged in the L-shaped through slot 7, linkage components 9 are arranged at both ends of the upper end surface of the well column 1, and when the manhole cover 2 is pressed down, the linkage component 9 is driven to push the L-shaped slide bar 8 to insert into the special-shaped slot 6.

[0027] Reference Figure 2-5 The linkage assembly 9 includes a cavity body 91 disposed on the well column 1, a gear 92 rotatably disposed in the cavity body 91, a rack a93 and a rack b94 respectively meshing with the gear 92, and a return spring 95 fixedly disposed at the lower end of the rack a93. A slide groove a96 is disposed at the upper end of the inner wall of the cavity body 91, and a slide groove b97 is disposed at the right end surface of the inner wall of the cavity body 91. The rack a93 is slidably disposed on the slide groove a96, and the rack b94 is slidably disposed on the slide groove b97.

[0028] It is worth mentioning here that by pressing down the rack a93, the gear 92 is driven to rotate, thereby driving the rack b94 to slide into the manhole cover 2, so that the manhole cover 2 is fixed on the manhole column 1.

[0029] Reference Figure 4 The end of the L-shaped slide bar 8 close to the bolt 4 is provided with a trapezoidal inclined surface 81 , and the trapezoidal inclined surface 81 matches the special-shaped groove 6 .

[0030] It is worth mentioning here that the bolt 4 is limited in position in the manhole cover 2 by matching the trapezoidal inclined surface 81 with the special-shaped groove 6 , and the rack b94 is further clamped on the manhole cover 2 .

[0031] Reference Figure 6The slotted hole 3 is provided with an internal thread corresponding to the external thread of the bolt 4. The upper end surface of the bolt 4 is provided with a polygonal slotted hole 41.

[0032] In this embodiment, a polygonal slot is provided on the bolt to prevent unauthorized opening by non-staff, thereby reducing the economic losses caused by the theft of the manhole cover. At the same time, a professional can turn the bolt 4 to push open the L-shaped slide rod 8 and the rack b94, so that the manhole cover 2 can be taken out.

[0033] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art under the technical guidance of the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A manhole cover for preventing theft, comprising a manhole column (1) and a manhole cover (2) arranged on the manhole column (1), characterized in that: A bolt (4) is arranged in the slot hole (3) at the center of the manhole cover (2); a special-shaped slot (6) is arranged on the inclined surface (5) at the lower end of the bolt (4); an L-shaped through slot (7) penetrating the main body of the manhole cover (2) is arranged in the middle of the manhole cover (2); an L-shaped slide bar (8) is slidably arranged in the L-shaped through slot (7); linkage components (9) are arranged at both ends of the upper end surface of the well column (1); when the manhole cover (2) is pressed down, the linkage component (9) is driven to push the L-shaped slide bar (8) to insert into the special-shaped slot (6).

2. The anti-theft manhole cover according to claim 1, characterized in that: The linkage assembly (9) comprises a hollow body (91) arranged on the well column (1), a gear (92) rotatably arranged in the hollow body (91), a rack a (93) and a rack b (94) respectively meshed with the gear (92), and a return spring (95) fixedly arranged at the lower end of the rack a (93).

3. The anti-theft manhole cover according to claim 2, characterized in that: A slide groove a (96) is provided at the upper end of the inner wall of the cavity body (91), and a slide groove b (97) is provided at the right end surface of the inner wall of the cavity body (91). The rack a (93) is slidably provided on the slide groove a (96), and the rack b (94) is slidably provided on the slide groove b (97).

4. The anti-theft manhole cover according to claim 1, characterized in that: The slotted hole (3) is provided with an internal thread corresponding to the external thread of the bolt (4).

5. The anti-theft manhole cover according to claim 1, characterized in that: The upper end surface of the bolt (4) is provided with a polygonal slot hole (41).

6. The anti-theft manhole cover according to claim 1, characterized in that: The end of the L-shaped sliding rod (8) close to the bolt (4) is provided with a trapezoidal inclined surface (81), and the trapezoidal inclined surface (81) matches the special-shaped groove (6).

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