A backflow prevention manhole cover

Abstract

The utility model discloses an anti-backflow manhole cover, which belongs to the technical field of manhole covers and comprises a manhole cover body. A plurality of air passages communicating with the internal and external environments of the manhole cover body are opened on the manhole cover body. The air passages comprise an air outlet portion and a sealing portion that are communicated with each other. The air outlet portion opens toward the inside of the manhole cover, and the sealing portion opens toward the outside of the manhole cover. A plugging component is movably mounted on the manhole cover body, and the plugging component can close the opening of the sealing portion. The plugging component comprises a floating plate, which is made of a foam material with a relatively low density. When the water level at the bottom of the well rises, the floating plate will float upward with the rising water level, thereby driving the plugging member above it to move upward, and finally forming a blockage to prevent the sewage at the bottom of the well from backflowing onto the street.

Description

Technical Field

[0001] The utility model discloses a backflow prevention manhole cover, belonging to the technical field of manhole covers. Background Art

[0002] A manhole cover, scientifically known as a manhole cover, is a device used to cover a deep well on a road or in a home. Its main purpose is to prevent people or objects from falling.

[0003] Currently, existing manhole covers are usually equipped with air ducts, whose main function is to allow rainwater or sewage to enter the well through the manhole cover, and to allow the air inside and outside the well to interact. However, when the amount of rain is large, the existing manhole covers will backflow, and the sewage will flow back to the street through the air duct.

[0004] A solution is now proposed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a backflow prevention manhole cover in order to solve the above-mentioned problem.

[0006] The utility model achieves the above-mentioned purpose through the following technical scheme: a backflow prevention manhole cover, including a manhole cover body, on which a plurality of air ducts connecting the internal and external environments of the manhole cover body are opened, the air ducts include an air outlet portion and a sealing portion that are connected to each other, the air outlet portion opens toward the inside of the manhole cover, and the sealing portion opens toward the outside of the manhole cover, a sealing component is movably installed on the manhole cover body, and the sealing component can close the opening of the sealing portion.

[0007] Preferably, the blocking assembly comprises a floating plate and a plurality of blocking members, one end of the blocking member extends into the sealing portion and can slide in the sealing portion, and the other end of the blocking member is fixedly connected to the floating plate.

[0008] Preferably, the projection surface of the blocking member can completely cover the opening of the sealing portion.

[0009] Preferably, a guide groove is provided in the middle of the manhole cover body, and a guide column is fixedly connected to the middle of the floating plate. The guide column can extend into the guide groove and be slidably connected to the guide groove.

[0010] Preferably, the guide groove has a T-shaped cross section, and a plurality of clips are installed at one end of the guide column away from the floating board. The clips are connected to the guide column via springs, and the clips can squeeze the springs and completely sink into the guide column.

[0011] Preferably, a warning rod is fixed on the blocking member, and the warning rod can pass through the sealing portion and extend to the outside.

[0012] Preferably, the surface of the warning stick is coated with reflective paint.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. Using the buoyancy of water, a movable floating plate is set under the manhole cover. When the water level at the bottom of the well rises, the floating plate will float up, so that the sealing parts on the floating plate can be used to block the opening of the airway to prevent sewage at the bottom of the well from entering the street.

[0015] 2. A warning stick with reflective paint is set on the sealing piece. When the water level rises, the sealing piece rises accordingly, causing the warning stick to extend to the outside of the manhole cover to remind people around that the water level at the bottom of the well is too high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a front view structural schematic diagram of the utility model;

[0018] Figure 3 For the utility model Figure 2 A-axis cross-sectional structural diagram;

[0019] Figure 4 This is a schematic diagram of the plugging component structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the floating board of the utility model in a raised state;

[0021] Figure 6 It is a schematic internal cross-sectional view of the floating board of the utility model in a raised state.

[0022] Figure numerals: 1. manhole cover body; 2. air outlet; 3. sealing part; 4. floating plate; 5. blocking part; 6. guide groove; 7. guide column; 8. clamping part; 9. spring; 10. warning stick. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] like Figure 1 , Figure 2 , Figure 3 As shown, a backflow prevention manhole cover includes a manhole cover body 1, and a plurality of air passages are opened on the manhole cover body 1 to connect the internal and external environments of the manhole cover body 1. The air passages include an air outlet 2 and a sealing part 3 that are connected to each other. The air outlet 2 opens toward the inside of the manhole cover, and the sealing part 3 opens toward the outside of the manhole cover. A plugging component is movably installed on the manhole cover body 1, and the plugging component can close the opening of the sealing part 3. The plugging component of this product is made of low-density foam material. When the water level at the bottom of the well rises, the plugging component will also float up. Figure 5 and Figure 6 As shown, after the blocking component floats up, it blocks the opening of the sealing part 3 toward the outside of the manhole cover to prevent sewage at the bottom of the well from flowing back onto the street.

[0025] like Figure 4 As shown, the plugging assembly includes a floating plate 4 and a plurality of plugging members 5. One end of the plugging member 5 extends into the sealing portion 3 and can slide in the sealing portion 3. The other end of the plugging member 5 is fixedly connected to the floating plate 4. The floating plate 4 has a large area and can provide a large buoyancy. When the water level at the bottom of the well rises, when the water level rises to contact the floating plate 4, since the floating plate 4 is made of a low-density foam material, it will float upward with the water level. In the process of the floating plate 4 floating upward, it will drive the plugging member 5 to float up. After floating up a certain distance, as shown in FIG. Figure 5 and Figure 6 As shown, the blocking member 5 will block the opening of the sealing part 3, thereby blocking the communication between the inside and outside of the manhole cover and preventing backflow. At the same time, the projection surface of the blocking member 5 can completely cover the opening of the sealing part 3. This design can ensure that the blocking member 5 can seal the opening connecting the sealing part 3 with the outside world without dead angles, thereby improving the sealing effect.

[0026] In such Figure 3 and Figure 6As shown, a guide groove 6 is opened in the middle of the manhole cover body 1, and a guide column 7 is fixedly connected to the middle of the floating plate 4. The guide column 7 can be extended into the guide groove 6 and is slidably connected with the guide groove 6. By arranging the guide column 7 and the guide groove 6 that cooperate with each other, the movement direction of the plugging assembly is specified. In the process of the overall floating of the plugging assembly, it is guided by the guide groove 6 and the guide column 7, and the movement process of the plugging assembly will not be skewed.

[0027] For example Figure 3 and Figure 4 As shown, the guide groove 6 has a "T"-shaped cross-section, and a plurality of clips 8 are installed at one end of the guide column 7 away from the floating plate 4. The clips 8 are connected to the guide column 7 by springs 9. The clips 8 can squeeze the springs 9 and completely immerse in the guide column 7. By setting the clips 8, the guide column 7 can be overlapped on the table surface of the guide groove 6 using the clips 8. When installing the blocking component, the clips 8 can be squeezed to compress the springs 9 and completely immerse in the guide column 7. Then, the guide column 7 is inserted into the guide groove 6 and pushed inward. After pushing a certain distance, the clips 8 pass over the narrower part of the guide groove 6 and enter the wider part of the "T"-shaped cross-section. At this time, the clips 8 are not affected by the inner wall of the guide groove 6, and the springs 9 begin to reset, thereby ejecting the clips 8, so that the clips 8 overlap the table surface in the guide groove 6 to prevent the blocking component from falling.

[0028] Refer to Figure 5 As shown, a warning stick 10 is fixed on the sealing member 5, and the warning stick 10 can pass through the sealing portion 3 and extend to the outside. When the water level at the bottom of the well rises and pushes the sealing component to float up, the warning stick 10 will be extended to the outside of the manhole cover, thereby forming a protruding mark on the manhole cover to remind that the water level at the bottom of the well is too high. The surface of the warning stick 10 of this product is coated with reflective paint, which can reflect cars and other light sources, which is conducive to identifying the warning stick 10 in a night environment.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A backflow prevention manhole cover, comprising a manhole cover body, characterized in that: The manhole cover body is provided with a plurality of air passages connecting the internal and external environments of the manhole cover body. The air passages include an air outlet portion and a sealing portion which are connected to each other. The air outlet portion opens toward the inside of the manhole cover, and the sealing portion opens toward the outside of the manhole cover. A sealing component is movably installed on the manhole cover body, and the sealing component can close the opening of the sealing portion.

2. The anti-backflow manhole cover according to claim 1, characterized in that: The blocking assembly comprises a floating plate and a plurality of blocking members, one end of the blocking member extends into the sealing portion and can slide in the sealing portion, and the other end of the blocking member is fixedly connected to the floating plate.

3. The anti-backflow manhole cover according to claim 2, characterized in that: The projection surface of the blocking piece can completely cover the opening of the sealing portion.

4. The anti-backflow manhole cover according to claim 3, characterized in that: A guide groove is provided in the middle of the manhole cover body, and a guide column is fixedly connected to the middle of the floating plate. The guide column can extend into the guide groove and be slidably connected to the guide groove.

5. The anti-backflow manhole cover according to claim 4, characterized in that: The guide groove has a T-shaped cross section. A plurality of clips are installed at one end of the guide column away from the floating plate. The clips are connected to the guide column via springs. The clips can squeeze the springs and completely sink into the guide column.

6. The anti-backflow manhole cover according to claim 2, characterized in that: A warning rod is fixed on the blocking piece, and the warning rod can pass through the sealing part and extend to the outside.

7. The anti-backflow manhole cover according to claim 6, characterized in that: The surface of the warning stick is coated with reflective paint.

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