Safe anti-backflow well lid

Abstract

The utility model discloses a safe anti-backflow type well lid which comprises a well lid body, a hole is formed in the top of the well lid body, a cover plate is arranged at the bottom of the well lid body and connected with a box body through a rotating shaft, the cover plate is installed on the top of the box body, the hole is located in the top of the box body, and a blocking frame is welded to the side face of the box body. The surface of the blocking frame is attached to the cover plate. According to the safe anti-backflow well lid, the hole is formed in the top of the well lid body, the cover plate is arranged at the bottom of the well lid body and connected with the box body through the rotating shaft, the cover plate is installed at the top of the box body, the hole is located in the top of the box body, the blocking frame is welded to the side face of the box body, the surface of the blocking frame is attached to the cover plate, and the cover plate is attached to the box body upwards through buoyancy; at the moment, water flow does not flow backwards out of the safety well lid through the hole, and the anti-backflow safety well lid has the anti-backflow effect when used and is very convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of manhole covers, and particularly relates to a safety anti-backflow manhole cover. Background Art

[0002] A manhole cover is a device used to cover a road or a deep well at home to prevent people or objects from falling. It can be classified into metal manhole covers, high-strength fiber cement concrete manhole covers, resin manhole covers, etc. Generally, it is circular and can be used in green belts, sidewalks, motor vehicle lanes, docks, alleys, etc.

[0003] The existing safety manhole covers on the market have the following problems in actual use:

[0004] 1. When the traditional safety manhole cover is actually used, since there are water inlet holes on the surface of the safety manhole cover, when there is a lot of water inside the well, the water may flow back out of the manhole cover through the water inlet holes of the safety manhole cover, and it does not have the anti-backflow effect during use, which is rather troublesome.

[0005] 2. During the use of most safety manhole covers, after the safety manhole cover is installed, it is completely embedded inside the inlet. At this time, the gap between the safety manhole cover and the wellhead is small. When it is necessary to open the safety manhole cover, tools such as crowbars are usually required. It is necessary to carry or find suitable tools to open the safety manhole cover during use, which is rather inconvenient. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a safety anti-backflow manhole cover to solve the technical problems raised in the background art.

[0007] To achieve the above purpose, the specific technical solution of the utility model is as follows: A safety anti-backflow manhole cover includes a manhole cover body. A hole is opened at the top of the manhole cover body. A cover plate is provided at the bottom of the manhole cover body. The cover plate is connected to a box body through a rotating shaft. The cover plate is installed on the top of the box body. The hole is located at the top of the box body. A blocking frame is welded on the side surface of the box body. The surface of the blocking frame is attached to the cover plate. A blocking ring is provided at the bottom of the cover plate. The surface of the blocking ring is fixedly connected to a wellhead ring.

[0008] Preferably, a groove is opened at the top of the cover plate. A limiting hole is opened inside the cover plate. The limiting hole is located inside the groove. A shaft rod is sleeved inside the limiting hole. One end of the shaft rod is welded with a crowbar. The crowbar is located inside the groove.

[0009] Preferably, an external threaded rod is welded at the bottom of the manhole cover body. A side plate is welded on the side surface of the box body. The external threaded rod penetrates through the side plate. A nut is installed on the surface of the external threaded rod. One end of the nut is attached to the bottom of the side plate.

[0010] Preferably, a reinforcing block is welded on the surface of the wellhead ring. The reinforcing blocks are distributed in a circular form. An installation ring is welded at the bottom of the reinforcing block, and the installation ring is welded to the wellhead ring at the top.

[0011] Preferably, an internal threaded ring is welded to the inner wall of the retaining ring. An external threaded ring is sleeved inside the internal threaded ring. A filter plate is fixedly connected inside the external threaded ring, and the filter plate is located inside the wellhead ring.

[0012] Preferably, a limiting ring is welded to one end of the external threaded ring. The bottom of the limiting ring is attached to the retaining ring, and the top of the limiting ring is attached to the bottom of the manhole cover body.

[0013] The safety anti-backflow manhole cover of the present invention has the following advantages:

[0014] 1. For this safety anti-backflow manhole cover, by opening a hole at the top of the manhole cover body and providing a cover plate at the bottom of the manhole cover body, the cover plate is connected to the box body through a rotating shaft, the cover plate is installed on the top of the box body, and the hole is located at the top of the box body. A retaining frame is welded to the side of the box body, the surface of the retaining frame is attached to the cover plate, and the opening angle of the cover plate is an acute angle. Also, the material of the cover plate has buoyancy. When using the safety manhole cover, when water flow hits the cover plate, the cover plate fits upward against the box body due to buoyancy, closing the box body and thus closing the hole. At this time, the water flow will not flow back out of the safety manhole cover through the hole, which has an anti-backflow effect during use and is very convenient to use.

[0015] 2. For this safety anti-backflow manhole cover, by opening a groove at the top of the cover plate and opening a limiting hole inside the cover plate, the limiting hole is located inside the groove, and a shaft rod is sleeved inside the limiting hole. A crowbar is welded to one end of the shaft rod, and the crowbar is located inside the groove. When the safety anti-backflow manhole cover is in use and it is necessary to open the manhole cover body, the end of the crowbar can be lifted using the rotation effect provided by the shaft rod, and then the manhole cover body can be opened using the crowbar as a force application point, which is very convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the wellhead ring structure of the present invention;

[0019] Figure 3 Schematic diagram of the groove structure of the present utility model;

[0020] Figure 4 Schematic diagram of the box body structure of the present utility model;

[0021] Figure 5 Schematic diagram of the crowbar structure of the present utility model;

[0022] Figure 6 Schematic diagram of the filter plate structure of the present utility model.

[0023] Explanation of the markings in the figure: 1. Installation ring; 2. Reinforcing block; 3. Wellhead ring; 4. Manhole cover body; 5. Retaining ring; 6. Hole; 7. Box body; 8. Side plate; 9. External threaded rod; 10. Nut; 11. Cover plate; 12. Retaining frame; 13. Groove; 14. Limit hole; 15. Crowbar; 16. Shaft rod; 17. Limit ring; 18. External threaded ring; 19. Filter plate; 20. Internal threaded ring. Detailed implementation manners

[0024] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0025] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present utility model.

[0026] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0027] In the embodiments of the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0028] The following disclosure provides many different embodiments or examples for implementing different structures of the embodiments of the present utility model. To simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0029] To better understand the purpose, structure and function of the present utility model, the following further describes in detail a safety anti-backflow manhole cover of the present utility model with reference to the drawings.

[0030] As Figures 1-6 shown, a safety anti-backflow manhole cover of the present utility model includes a manhole cover body 4. A hole 6 is opened at the top of the manhole cover body 4. A cover plate 11 is provided at the bottom of the manhole cover body 4. The cover plate 11 is connected to a box body 7 through a rotating shaft. The cover plate 11 is installed on the top of the box body 7. The hole 6 is located at the top of the box body 7. A retaining frame 12 is welded on the side of the box body 7. By installing the retaining frame 12, the maximum angle at which the cover plate 11 can be opened can be controlled by using the retaining frame 12, so that the opening angle of the cover plate 11 is always an acute angle. Furthermore, when the cover plate 11 is lifted by water, its movement position is restricted, which is very convenient to use. The surface of the retaining frame 12 is attached to the cover plate 11. A retaining ring 5 is provided at the bottom of the cover plate 11. The surface of the retaining ring 5 is fixedly connected to the wellhead ring 3. By installing the retaining ring 5, the retaining ring 5 can provide a limiting effect for the manhole cover body 4, so that the manhole cover body 4 will not fall into the wellhead, which is very convenient to use.

[0031] A groove 13 is opened at the top of the cover plate 11. A limiting hole 14 is opened inside the cover plate 11. The limiting hole 14 is located inside the groove 13. A shaft rod 16 is sleeved inside the limiting hole 14. One end of the shaft rod 16 is welded with a crowbar 15. The crowbar 15 is located inside the groove 13. By installing the crowbar 15, when it is necessary to open the manhole cover body 4, one end of the crowbar 15 can be lifted by using the rotating effect provided by the shaft rod 16, and then the manhole cover body 4 can be opened by using the crowbar 15 as a force application point, which is very convenient to use.

[0032] The bottom of the manhole cover body 4 is welded with an external threaded rod 9, and the side of the box body 7 is welded with a side plate 8. The external threaded rod 9 passes through the side plate 8, and a nut 10 is installed on the surface of the external threaded rod 9. One end of the nut 10 abuts against the bottom of the side plate 8. By installing the external threaded rod 9, passing the external threaded rod 9 through the side plate 8, and installing the nut 10 on the external threaded rod 9, an installation effect can be provided for the box body 7, enabling the box body 7 to have the effects of installation and disassembly, which is very convenient to use.

[0033] Reinforcing blocks 2 are welded on the surface of the wellhead ring 3. The reinforcing blocks 2 are distributed in a circular form. The bottom of the reinforcing block 2 is welded with a mounting ring 1, and the top of the mounting ring 1 is welded with the wellhead ring 3. By installing the reinforcing blocks 2, the strength between the mounting ring 1 and the wellhead ring 3 can be improved by using the reinforcing blocks 2, making the strength of the wellhead relatively high and the stability strong during use.

[0034] An internal threaded ring 20 is welded to the inner wall of the retaining ring 5. An external threaded ring 18 is sleeved inside the internal threaded ring 20. A filter plate 19 is fixedly connected inside the external threaded ring 18. The filter plate 19 is located inside the wellhead ring 3. By installing the filter plate 19, the water entering the wellhead ring 3 can be filtered by using the filter plate 19, so that larger garbage will not enter the sewer, which is very convenient to use.

[0035] A limiting ring 17 is welded to one end of the external threaded ring 18. The bottom of the limiting ring 17 abuts against the retaining ring 5, and the top of the limiting ring 17 abuts against the bottom of the manhole cover body 4. By installing the limiting ring 17, a limiting effect can be provided for the external threaded ring 18 by using the limiting ring 17, so that the external threaded ring 18 will not fall into the wellhead ring 3, having a protective effect during use.

[0036] The working principle of this safety anti-backflow manhole cover: When using the safety anti-backflow manhole cover, the mounting ring 1 and the wellhead ring 3 should first be installed in the appropriate positions. Subsequently, the external threaded ring 18 is installed inside the internal threaded ring 20 until the limiting ring 17 abuts against the top of the retaining ring 5 to position the external threaded ring 18. At this time, the filter plate 19 will be installed. Then, the external threaded rod 9 is passed through the side plate 8, and a nut 10 is installed on the surface of the external threaded ring 18 until one end of the nut 10 abuts against the bottom of the side plate 8 to fix the box body 7. Then, the manhole cover body 11 can be placed inside the inlet ring until the bottom of the manhole cover body 11 abuts against the top of the limiting ring 17. During the use of the safety anti-backflow manhole cover, water flow will enter the wellhead ring 3 through the holes 6. When the water flow hits the manhole cover 11, the manhole cover 11 floats upward and abuts against the box body 7 through buoyancy, closing the box body 7 and thus closing the holes 6. At this time, the water flow will not flow back out of the safety manhole cover through the holes 6, having an anti-backflow effect during use and being very convenient to use. When it is necessary to open the manhole cover body 4, one end of the crowbar 15 can be lifted by using the rotating effect provided by the shaft rod 16, and then the manhole cover body 4 can be opened by using the crowbar 15 as a force application point, which is very convenient to use.

[0037] It is understood that the present utility model is described by means of some embodiments. Those skilled in the art will be aware that, without departing from the spirit and scope of the present utility model, various changes or equivalent substitutions can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A safety anti-backflow manhole cover, comprising a manhole cover body (4), characterized in that: A hole (6) is formed at the top of the manhole cover body (4). A cover plate (11) is provided at the bottom of the manhole cover body (4). The cover plate (11) is connected to a box body (7) through a rotating shaft. The cover plate (11) is installed on the top of the box body (7). The hole (6) is located at the top of the box body (7). A blocking frame (12) is welded to the side surface of the box body (7). The surface of the blocking frame (12) is attached to the cover plate (11). A blocking ring (5) is provided at the bottom of the cover plate (11). The surface of the blocking ring (5) is fixedly connected to a wellhead ring (3).

2. The safety anti-backflow manhole cover according to claim 1, characterized in that: A groove (13) is formed at the top of the cover plate (11). A limiting hole (14) is formed inside the cover plate (11). The limiting hole (14) is located inside the groove (13). A shaft rod (16) is sleeved inside the limiting hole (14). One end of the shaft rod (16) is welded to a crowbar (15). The crowbar (15) is located inside the groove (13).

3. The safety anti-backflow manhole cover according to claim 1, characterized in that: An external threaded rod (9) is welded to the bottom of the manhole cover body (4). A side plate (8) is welded to the side surface of the box body (7). The external threaded rod (9) penetrates through the side plate (8). A nut (10) is installed on the surface of the external threaded rod (9). One end of the nut (10) is attached to the bottom of the side plate (8).

4. The safety anti-backflow manhole cover according to claim 1, characterized in that: Reinforcing blocks (2) are welded to the surface of the wellhead ring (3). The reinforcing blocks (2) are distributed in a circular form. An installation ring (1) is welded to the bottom of the reinforcing blocks (2). The installation ring (1) is welded to the wellhead ring (3) at the top.

5. The safety anti-backflow manhole cover according to claim 1, characterized in that: An internal threaded ring (20) is welded to the inner wall of the blocking ring (5). An external threaded ring (18) is sleeved inside the internal threaded ring (20). A filter plate (19) is fixedly connected inside the external threaded ring (18). The filter plate (19) is located inside the wellhead ring (3).

6. The safety anti-backflow manhole cover according to claim 5, characterized in that: A limiting ring (17) is welded to one end of the external threaded ring (18). The bottom of the limiting ring (17) is attached to the blocking ring (5). The top of the limiting ring (17) is attached to the bottom of the manhole cover body (4).

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