Noise reduction manhole cover

Abstract

The present invention provides a noise reduction inspection manhole cover, which has a simple structure, low cost, simple operation, long service life and can effectively reduce noise. A noise reduction inspection manhole cover comprises a manhole seat and a manhole cover, wherein the inner wall of the manhole seat is provided with a manhole cover support body extending toward the center of a circle, the manhole cover support body is provided with a groove, and a sealing member is provided in the groove; the outer edge of the manhole cover is arranged on the manhole cover support body, a boss is arranged on the lower surface of the manhole cover, and a stepped hole with a larger upper part and a smaller lower part is arranged on the manhole cover, the stepped hole comprises a first step hole and a second step hole, the first step hole is arranged on the manhole cover, and the second step hole is arranged on the boss; more than two fastening components are arranged between the manhole seat and the manhole cover; the fastening components comprise a fastening bolt, a lock nut, a pressure plate, a pin and an end cover; the fastening bolt passes through the first step hole, the second step hole and the pressure plate in sequence and is connected to the lock nut as a whole; the fastening bolt can approach or move away from the center line of the manhole cover along the first step hole and the second step hole, and the two ends of the pressure plate can contact the manhole cover support body and the boss.

Description

Technical Field

[0001] The invention relates to an inspection well cover, in particular to a noise-reducing inspection well cover, and belongs to the technical field of inspection well covers used in municipal engineering. Background Art

[0002] At present, the inspection manhole covers installed on the roads often generate a lot of noise when vehicles pass through their surfaces, affecting the rest of nearby residents and causing complaints from residents.

[0003] In response to the noise problem of manhole covers, many domestic patents have proposed solutions. For example, patent CN206888027U describes adding an elastic pad between the manhole cover and the manhole seat to reduce noise, and there is a card limiter; that is, reducing the metal contact between the manhole cover and the manhole seat, so even if it hits, it will not produce a lot of noise; but the patent only describes reducing the impact between the manhole cover and the manhole seat, and cannot avoid the vibration between the manhole cover and the manhole seat, so the life of the elastic gasket is short. For example, patent CN209211502U describes the use of a three-point spring arm to fasten and lock the manhole cover and the manhole seat, thereby reducing the vibration of the manhole cover and the noise of the manhole cover. However, this patent has the problems of complex structure and high cost. Summary of the invention

[0004] The purpose of the present invention is to provide a noise-reducing inspection manhole cover which has a simple structure, low cost, simple operation, long service life and can effectively reduce noise.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A noise-reducing inspection manhole cover comprises a manhole seat and a manhole cover, wherein the inner wall of the manhole seat is provided with a manhole cover support body extending toward the center of a circle, the manhole cover support body is provided with a groove, and a sealing member is provided in the groove; the outer edge of the manhole cover is arranged on the manhole cover support body, a boss is arranged on the lower surface of the manhole cover, and a stepped hole which is larger at the top and smaller at the bottom is arranged on the manhole cover, the stepped hole comprises a first-step hole and a second-step hole, the first-step hole is arranged on the manhole cover, and the second-step hole is arranged on the boss; more than two fastening assemblies are arranged between the manhole seat and the manhole cover; the fastening assemblies comprise fastening bolts, lock nuts, pressure plates, pins and a cover plate; the fastening bolts pass through the first-step holes, the second-step holes and the pressure plate in sequence and are connected to the lock nuts as a whole; the fastening bolts can approach or move away from the center line of the manhole cover along the first-step holes and the second-step holes, and both ends of the pressure plate can contact the manhole cover support body and the boss.

[0007] The preferred embodiment of the noise reduction inspection manhole cover is that the pressure plate is a bent structure, including a first horizontal section, a second horizontal section and a vertical section, the first horizontal section is in contact with the lower bottom surface of the manhole cover support body, the vertical section is in contact with the lower bottom surface of the boss, the second horizontal section is located between the first horizontal section and the vertical section, and the upper plane of the second horizontal section is convex than the upper plane of the first horizontal section.

[0008] According to the preferred embodiment of the noise reduction inspection well cover, a spring is mounted on the fastening bolt, and both ends of the spring are in contact with the pressure plate and the boss.

[0009] The preferred embodiment of the noise reduction inspection manhole cover comprises a rotation limiting baffle plate I on the lower surface of the manhole cover and a rotation limiting baffle plate II on the lower surface of the pressure plate.

[0010] The preferred embodiment of the noise reduction inspection manhole cover also includes an ear plate assembly, which includes an ear plate and an ear seat. The ear plate is arranged on the circumference of the manhole cover and protrudes away from the center. The ear seat is arranged on the manhole seat and has a recess for accommodating the ear plate. The ear plate is wrapped with a rubber pad.

[0011] In the preferred embodiment of the noise reduction inspection well cover, the outer side of the first step hole and the outer edge of the ear plate are on the same diameter.

[0012] In the preferred embodiment of the noise reduction inspection well cover, a cover plate is provided on the first-step hole.

[0013] The advantages of the present invention are:

[0014] 1. The manhole cover and the manhole seat are fastened by the fastening components and ear plates set on the manhole cover, which can prevent the manhole cover from jumping and thus avoid the generation of noise. In addition, the contact parts between the manhole cover and the manhole seat are provided with seals and rubber pads to further avoid contact between metals and reduce the possibility of noise.

[0015] 2. Using fastening components and ear plates to fasten the manhole cover is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] Figure 1 It is an isometric schematic diagram of an embodiment of the present invention.

[0018] Figure 2 It is a schematic top view of an embodiment of the present invention.

[0019] Figure 3 : A schematic cross-sectional view of an inspection manhole cover according to an embodiment of the present invention.

[0020] Figure 4 : An enlarged partial cross-sectional view of the inspection well cover according to an embodiment of the present invention.

[0021] Figure 5 : Partial enlarged cross-sectional view of the inspection manhole cover. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as a limitation on the present invention.

[0024] like Figure 1 and Figure 2 As shown, a noise reduction inspection manhole cover includes a manhole seat 2 and a manhole cover 1, more than two fastening components 3 and an ear plate component are arranged between the manhole seat 2 and the manhole cover 1, the ear plate component includes an ear plate 11 and an ear seat 12, the ear plate 11 is arranged on the circumference of the manhole cover 1 and protrudes away from the center, the ear seat 12 is arranged on the manhole seat 2 and has a recess for accommodating the ear plate 11, and the ear plate 11 is wrapped with a rubber pad 10.

[0025] like Figure 3 and Figure 4 As shown, the inner wall of the well seat 2 is provided with a manhole cover support body a extending toward the center of the circle, and a groove is provided on the manhole cover support body a, and a seal 4 is provided in the groove, and the seal 4 can be an integral type or a segmented type. The manhole cover 1 is fitted with the manhole cover support surface of the well seat 2 through the seal 4. The outer edge of the manhole cover 1 is arranged on the manhole cover support body a, and a boss b is arranged on the lower surface of the manhole cover. The manhole cover 1 is provided with a stepped hole c that is larger at the top and smaller at the bottom. The stepped hole c includes a first step hole and a second step hole. The first step hole is arranged on the upper surface of the manhole cover 1, and the second step hole is arranged on the boss b; the outer side of the first step hole is on the same diameter as the outer edge of the ear plate 11.

[0026] like Figure 3 and Figure 4 As shown, the fastening assembly 3 includes a fastening bolt 5, a lock nut 8, a pressure plate 6, a pin 7 and a cover plate 14; the fastening bolt 5 passes through the first step hole, the second step hole and the pressure plate 6 in sequence and is connected to the lock nut 8 as a whole, and the lower part of the fastening bolt 5 below the lock nut 8 is provided with a pin 7 perpendicular to its axial direction, and a spring 9 is mounted on the fastening bolt 5, and both ends of the spring 9 are in contact with the pressure plate 6 and the boss B; the fastening bolt 5 can approach or move away from the center line of the manhole cover along the first step hole and the second step hole, and both ends of the pressure plate 6 can be in contact with the manhole cover support body A and the boss B. The first step hole is provided with a cover plate 14, which can be used to ensure the flatness of the surface on the manhole cover 1 and prevent the fastening bolt 5 from loosening.

[0027] In this embodiment, the pressure plate 6 is a bending structure, including a first horizontal section 61, a second horizontal section 62 and a vertical section 63. The first horizontal section 61 is in contact with the lower bottom surface of the manhole cover support body a, and the vertical section 63 is in contact with the lower bottom surface of the boss B. The second horizontal section 62 is located between the first horizontal section 61 and the vertical section 63, and the upper plane of the second horizontal section 62 is convex than the upper plane of the first horizontal section 61.

[0028] In this embodiment, a rotation limiting baffle I15 is provided on the lower surface of the manhole cover 1, and a rotation limiting baffle II16 is provided on the lower surface of the pressure plate 6. When a tool is used to rotate the fastening bolt 5, due to the action of the rotation limiting baffle I15 and the rotation limiting baffle II16, the pressure plate 6 will not rotate when the fastening bolt 5 is rotated.

[0029] like Figure 2 , Figure 3 , Figure 5 As shown, the manhole cover 1 is provided with an ear plate 11 at a position symmetrical to the fastening assembly 3. The ear plate 11 is as shown in FIG. Figure 3 , Figure 5 As shown. The ear plate 11 is inserted into the ear seat 12 on the well seat 2 and can rotate in the ear seat 12, that is, the ear plate 11 rotates in the ear seat 12 when the well cover 1 is opened and closed. When the fastening assembly 3 fastens the well cover 1, the ear plate 11 will be tilted up at this time, so that it will be pressed against the corresponding joint surface of the ear seat 12. In order to avoid metal contact between the ear plate 11 and the ear seat 12, a rubber pad 10 is wrapped on the ear plate 11, so that even if the ear plate 11 and the ear seat 12 are displaced and impacted, no noise will be generated.

[0030] The specific working process of the present invention is as follows:

[0031] When tightening the manhole cover 1, push the fastening bolt 5 along the stepped hole 13 toward the outside of the manhole cover 1, and the accessories on the fastening bolt 5, such as the pressure plate 6, will move outward together with the fastening bolt 5. When the fastening bolt 5 moves to the end of the stepped hole c, use a tool to rotate the fastening bolt 5. Due to the action of the rotation-limiting baffle Ⅰ15 and the rotation-limiting baffle Ⅱ16, the pressure plate 6 will not rotate when the fastening bolt 5 rotates. The rotation of the fastening bolt 5 drives the lock nut 8 to move upward, so that when the fastening bolt 5 is tightened to a certain extent, the pressure plate 6 is pressed against the bottom surface of the manhole cover support surface of the well seat 2, and the manhole cover 1 is pressed and sealed together with the well seat 2. After tightening, the cover plate 14 can be covered on the opening of the manhole cover 1 to ensure the flatness of the surface on the manhole cover 1 and prevent the loosening of the fastening bolt 5.

[0032] When opening the manhole cover 1, the fastening bolt 5 is rotated in the opposite direction. Under the action of the spring 9, the pressure plate 6 moves downward together with the lock nut 8, thereby loosening the manhole cover 1 from the manhole seat. After the fastening bolt 5 is loosened to a certain extent, the fastening bolt 5 is pushed inward toward the center of the manhole cover, that is, along the stepped hole, to drive the pressure plate 6 out of the manhole cover support surface range of the manhole seat. At this time, a special tool can be inserted into the stepped hole c to hook the manhole cover 1 and open the manhole cover 1.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A noise-reducing inspection manhole cover, comprising a manhole seat (2) and a manhole cover (1), characterized in that: The inner wall of the well seat (2) is provided with a well cover support body (a) extending toward the center of the circle, the well cover support body (a) is provided with a groove, and a sealing member (4) is provided in the groove; The outer edge of the manhole cover (1) is arranged on the manhole cover support body (a), a boss (b) is arranged on the lower surface of the manhole cover, and a stepped hole with a larger top and a smaller bottom is arranged on the manhole cover (1), the stepped hole comprising a first step hole and a second step hole, the first step hole is arranged on the manhole cover (1), and the second step hole is arranged on the boss (b); Two or more fastening components (3) are provided between the well seat (2) and the well cover (1); The fastening assembly (3) comprises a fastening bolt (5), a lock nut (8) and a pressure plate (6); the fastening bolt (5) passes through the first step hole, the second step hole and the pressure plate (6) in sequence and is connected to the lock nut (8) as a whole; the fastening bolt (5) can move closer to or farther away from the center line of the manhole cover along the first step hole and the second step hole, and the two ends of the pressure plate (6) can contact the manhole cover support body (a) and the boss (b); It also includes an ear plate assembly, which includes an ear plate (11) and an ear seat (12), wherein the ear plate (11) is arranged on the circumference of the manhole cover (1) and protrudes away from the center, and the ear seat (12) is arranged on the manhole seat (2) and has a recess for accommodating the ear plate (11), and the ear plate (11) is wrapped with a rubber pad (10).

2. The noise reduction manhole cover according to claim 1 is characterized in that: The pressure plate (6) is a bent structure, comprising a first horizontal section, a second horizontal section and a vertical section, the first horizontal section is in contact with the lower bottom surface of the manhole cover support body (a), the vertical section is in contact with the lower bottom surface of the boss (b), the second horizontal section is located between the first horizontal section and the vertical section, and the upper plane of the second horizontal section is convex to the upper plane of the first horizontal section.

3. The noise reduction manhole cover according to claim 1 is characterized in that: A spring (9) is sleeved on the fastening bolt (5), and both ends of the spring (9) are in contact with the pressure plate (6) and the boss (b).

4. The noise reduction manhole cover according to any one of claims 1 to 3, characterized in that: The lower surface of the manhole cover (1) is provided with a rotation limiting baffle plate I (15), and the lower surface of the pressing plate (6) is provided with a rotation limiting baffle plate II (16).

5. The noise reduction manhole cover according to claim 1 is characterized in that: The outer side of the first step hole and the outer edge of the ear plate (11) are on the same diameter.

6. The noise reduction manhole cover according to claim 1 is characterized in that: The first-step hole is provided with a cover plate (14).

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