Well lid with inner lid

Abstract

The utility model relates to a well lid with an inner lid, the well lid comprises a well seat, a driving mechanism, a bearing support and a sealing plate, the bearing support is arranged on the well seat, the sealing plate is arranged on the bearing support, the bearing support comprises a supporting plate, a first observation hole is formed in the supporting plate, and a second observation hole is formed in the sealing plate. And the driving mechanism is used for driving the sealing plate to shield the first observation hole or avoid the first observation hole. According to the device, small-size foreign matters can be effectively prevented from entering a well, and the condition in the well can be quickly observed when needed.

Description

Technical Field

[0001] The present application relates to the field of manhole covers, and in particular to a manhole cover with an inner cover. Background Art

[0002] As an essential component of urban infrastructure, manhole covers are widely used in fields such as tap water, telecommunications, electricity, gas, heat, fire protection, and sanitation. With economic development, the upgrading of infrastructure construction has also driven the development of manhole cover technology. To improve safety, some manhole covers that frequently need to be opened for observation or maintenance, such as power manhole covers, will have an internal anti-fall device installed. Anti-fall devices are generally divided into two types: one is a fully enclosed sealing plate structure used to prevent small foreign objects from falling into the well, and the other is a bracket structure with a mesh that can support people or animals while allowing personnel to observe the conditions inside the well.

[0003] While fully enclosed seals effectively prevent small foreign objects from entering the well, they must be removed entirely to observe the well interior, a cumbersome and time-consuming process. Mesh-perforated brackets, while convenient for observing the well interior, cannot completely prevent small foreign objects from entering due to the presence of the mesh, posing a potential safety hazard. Utility Model Content

[0004] In order to solve the technical problem that the anti-fall device in the prior art cannot take into account both observation and blocking the entry of small foreign objects, the present application provides a manhole cover with an inner cover.

[0005] The present application provides a manhole cover with an inner cover, which adopts the following technical solution:

[0006] A manhole cover with an inner cover includes a manhole seat, a driving mechanism, a supporting bracket and a sealing plate. The supporting bracket is arranged on the manhole seat, and the sealing plate is arranged on the supporting bracket. The supporting bracket includes a base, and a first observation hole is opened on the base. The driving mechanism is used to drive the sealing plate to block the first observation hole or avoid the first observation hole.

[0007] By adopting the above technical solution, the anti-fall safety of the manhole cover is improved. When it is necessary to prevent small foreign objects from entering the well, the driving mechanism can be used to drive the sealing plate to block the first observation hole. When it is necessary to observe the situation in the well, the driving mechanism can be used to drive the sealing plate to avoid the first observation hole. The sealing plate can be easily switched between states and is easy to operate.

[0008] Optionally, the driving mechanism includes a bearing and a rotating shaft, the rotating shaft is fixed to the inner ring of the bearing, the outer ring of the bearing is arranged on the support plate, and the sealing plate is arranged on the rotating shaft.

[0009] By adopting the above technical solution, the sealing plate can rotate relative to the supporting plate through the bearing and the rotating shaft, thereby achieving the shielding and avoiding of the first observation hole. The structure is simple, convenient for processing and manufacturing, and easy to operate.

[0010] Optionally, the driving mechanism includes a handle, and the handle is provided on the rotating shaft.

[0011] By adopting the above technical solution, the sealing plate is rotated by rotating the handle, which makes the operation convenient and labor-saving.

[0012] Optionally, there are multiple first observation holes, and the sealing plate is provided with multiple second observation holes, the second observation holes are used to align and connect with the first observation holes, and the rotating shaft is used to drive the sealing plate to rotate until the second observation holes are aligned with the first observation holes.

[0013] By adopting the above technical solution and opening multiple first observation holes and second observation holes, the observation field of view can be maximized and the operation process is simplified. The state conversion of the sealing plate can be achieved by rotating a short distance, which is simple and quick to operate.

[0014] Optionally, the size of the sealing plate is equal to the size of the first observation hole.

[0015] By adopting the above technical solution, the size of the sealing plate is equal to that of the first observation hole. The sealing plate is equivalent to the hole cover of the first observation hole, has a small volume, and is easy to process.

[0016] Optionally, the driving mechanism includes a rotating handle and a fixed shaft provided on the support plate, the sealing plate is provided on the rotating handle, and the rotating handle is rotatably mounted on the fixed shaft.

[0017] By adopting the above technical solution, the sealing plate is rotated by rotating the rotating handle, which makes the operation convenient and labor-saving.

[0018] Optionally, a shaft sleeve is provided on the fixed shaft, the shaft sleeve can slide along the fixed shaft, the shaft sleeve can rotate around the fixed shaft, and the rotating handle and the sealing plate are provided on the shaft sleeve.

[0019] By adopting the above technical solution, when the first observation hole is closed, the handle contacts the shaft sleeve and the sealing plate is embedded in the first observation hole. When the first observation hole is to be opened, the sealing plate is driven by the handle to slide along the fixed axis until the sealing plate is disengaged from the first observation hole, and then the sealing plate is rotated to open the first observation hole. The operation is convenient and ensures the sealing of the first observation hole when the sealing plate blocks the first observation hole.

[0020] Optionally, the driving mechanism includes a push plate provided on the sealing plate, a guide rail is provided on the support plate, and the push plate is used to drive the sealing plate to move along the guide rail to block or avoid the first observation hole.

[0021] By adopting the above technical solution, the closing plate is driven to move horizontally by the handle, the operation is convenient and labor-saving, the guide rail structure is simple, and the processing is convenient.

[0022] Optionally, a locking ring is provided on the sealing plate, and a locking hook is provided on the supporting plate, and the locking hook is used to hook the locking ring to lock the sealing plate.

[0023] By adopting the above technical solution, the locking hook and the locking ring relatively lock the sealing plate, so that the sealing plate will not move arbitrarily due to reasons such as vibration of the well seat, thereby affecting the sealing of the first observation hole.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. It can effectively prevent small foreign objects from entering the well and can quickly observe the situation inside the well when needed;

[0026] 2. Maximize the observation field of view and simplify the operation process. Only a short rotation distance is required to achieve the state conversion of the sealing plate, which is easy and quick to operate;

[0027] 3. The sealing plate is equivalent to the hole cover of the first observation hole, which is small in size and easy to process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an explosion diagram of Example 1 of the present application.

[0029] Figure 2 It is a structural diagram of Example 2 of the present application.

[0030] Figure 3 It is along Figure 2 Cross-section view in the AA direction.

[0031] Figure 4 It is a structural diagram of Example 3 of the present application.

[0032] Figure 5 It is along Figure 4 Cross-sectional view along the middle BB direction.

[0033] Explanation of the accompanying reference numerals: 1. Well seat; 2. Driving mechanism; 21. Bearing; 22. Rotating shaft; 23. Handle; 24. Fixed shaft; 25. Bearing boss; 26. Bushing; 3. Load-bearing bracket; 31. Support plate; 32. First observation hole; 4. Closing plate; 41. Second observation hole; 42. Locking ring; 5. Rotating handle; 6. Push plate; 7. Guide rail; 8. Lock hook. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-5 This application is described in further detail.

[0035] Example 1:

[0036] Example 1 of the present application discloses a manhole cover with an inner cover. Figure 1 , including a well seat 1, a drive mechanism 2, a bearing bracket 3 and a sealing plate 4. The direction of gravity is set to the downward direction. The bearing bracket 3 is fixedly installed on the well seat 1 and is located below the well seat 1. The bearing bracket 3 includes a support plate 31. The support plate 31 is a circular plate. The support plate 31 is provided with a plurality of first observation holes 32 evenly distributed along the circumference. The minimum spacing between adjacent first observation holes 32 is greater than the cross-sectional width of the first observation hole 32. A bearing boss 25 is protruding from the center of the support plate 31. A connecting through hole is formed on the support plate 31 and the bearing boss 25. The drive mechanism 2 is installed in the through hole. The bearing bracket 3 is used to support people or objects to prevent them from falling into the well.

[0037] Reference Figure 1 The drive mechanism 2 includes a bearing 21 and a rotating shaft 22. The bearing 21 is press-fitted into the through-hole of the bearing boss 25, securing the outer ring of the bearing 21 to the support plate 31. The rotating shaft 22 is press-fitted into the bearing 21, securing the inner ring of the bearing 21 to the bearing 21. The rotating shaft 22 is rotatable relative to the support plate 31. The rotating shaft 22 passes through the support plate 31 and extends in both the vertical and horizontal directions. A handle 23 is fixed to the rotating shaft 22 and is located above the support plate 31. The handle 23 is made of stainless steel with an anti-slip surface treatment.

[0038] Reference Figure 1 The sealing plate 4 is fixedly mounted on the rotating shaft 22 and is located below the support plate 31. That is, the operator stands on the support plate 31 and turns the handle 23, which drives the sealing plate 4 to rotate. The sealing plate 4 has the same dimensions as the support plate 31 and is provided with a plurality of second observation holes 41. The number, size, and distribution of the second observation holes 41 are the same as those of the first observation holes 32.

[0039] The operating principle of the manhole cover with an inner cover in Example 1 of the present application is as follows: when an operator needs to observe the situation inside the manhole, the operator rotates the handle 23, thereby rotating the sealing plate 4, so that the second observation hole 41 is aligned with the first observation hole 32, and the first observation hole 32 is in an open state, allowing the operator to observe the situation inside the manhole through the observation hole. When it is necessary to prevent small foreign objects from entering the manhole, the operator rotates the handle 23, thereby rotating the sealing plate 4, so that the second observation hole 41 is offset from the first observation hole 32, and the first observation hole 32 is in a closed state.

[0040] Example 2:

[0041] Reference Figure 2 and Figure 3Unlike Example 1, in this embodiment, only a first observation hole 32 is provided on the support plate 31, and the size of the sealing plate 4 is equal to that of the first observation hole 32. The drive mechanism 2 includes a handle 5 and a fixed shaft 24. The fixed shaft 24 is fixedly mounted at the center of the support plate 31 and extends in the vertical direction. A sleeve 26 is provided on the sliding sleeve of the fixed shaft 24. The handle 5 and the sealing plate 4 are integrally formed on the sleeve 26 and are located above the support plate 31, allowing the sleeve 26 to rotate around the fixed shaft 24 and move up and down along the fixed shaft 24.

[0042] The implementation principle of the manhole cover with an inner cover in Example 2 of the present application is as follows: when the operator wants to observe the situation in the well, he lifts the handle 5, so that the sleeve 26 moves up a distance along the fixed shaft 24 until the sealing plate 4 is completely separated from the first observation hole 32, and then the handle 5 is rotated to make the sealing plate 4 avoid the first observation hole 32; when it is necessary to prevent small foreign objects from entering the well, the operator rotates the handle 5 until the sealing plate 4 is aligned with the first observation hole 32, and moves the handle 5 downward until the sleeve 26 contacts the upper end surface of the support plate 31, and then the sealing plate 4 is just embedded in the first observation hole 32.

[0043] Example 3:

[0044] Reference Figure 4 and Figure 5 , different from Example 1, in this embodiment, only one first observation hole 32 is provided on the support plate 31, and the size of the sealing plate 4 is slightly larger than the size of the first observation hole 32. The driving mechanism 2 includes a push plate 6 fixedly mounted on the sealing plate 4. A guide rail 7 is fixedly connected to the support plate 31, and two guide rails 7 are provided. The guide rail 7 is L-shaped, and the sealing plate 4 is slidably mounted between the two guide rails 7. The L-shaped guide rail 7 and the upper end surface of the support plate 31 clamp the sealing plate 4 in the middle to limit the upward movement of the sealing plate 4. A locking ring 42 is fixedly mounted on the upper end surface of the sealing plate 4, and a locking hook 8 is movably mounted on the support plate 31. The two guide rails 7 are connected at one end close to the locking hook 8, which is used to limit the movement stroke of the sealing plate 4 toward the locking hook 8.

[0045] The implementation principle of the manhole cover with an inner cover in Example 3 of the present application is: when the operator wants to observe the situation inside the well, the lock hook 8 and the lock ring 42 are unlocked, and the push plate 6 is pushed to move the sealing plate 4 in the direction away from the lock hook 8 until the sealing plate 4 avoids the first observation hole 32; when it is necessary to prevent small foreign objects from entering the well, the operator pushes the push plate 6 to move the sealing plate 4 in the direction close to the lock hook 8 until the sealing plate 4 is aligned with the first observation hole 32.

[0046] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A manhole cover with an inner cover, characterized in that: The invention comprises a well seat (1), a driving mechanism (2), a bearing bracket (3) and a sealing plate (4), wherein the bearing bracket (3) is arranged on the well seat (1), the sealing plate (4) is arranged on the bearing bracket (3), the bearing bracket (3) comprises a supporting plate (31), a first observation hole (32) is provided on the supporting plate (31), and the driving mechanism (2) is used for driving the sealing plate (4) to cover the first observation hole (32) or avoid the first observation hole (32).

2. The manhole cover with an inner cover according to claim 1, characterized in that: The driving mechanism (2) comprises a bearing (21) and a rotating shaft (22), wherein the rotating shaft (22) is fixed to the inner ring of the bearing (21), the outer ring of the bearing (21) is arranged on the supporting plate (31), and the sealing plate (4) is arranged on the rotating shaft (22).

3. The manhole cover with an inner cover according to claim 2, characterized in that: The driving mechanism (2) comprises a handle (23), and the handle (23) is provided on the rotating shaft (22).

4. The manhole cover with an inner cover according to claim 2, characterized in that: A plurality of first observation holes (32) are provided, and a plurality of second observation holes (41) are provided on the sealing plate (4). The second observation holes (41) are used to align and communicate with the first observation holes (32), and the rotating shaft (22) is used to drive the sealing plate (4) to rotate until the second observation holes (41) are aligned with the first observation holes (32).

5. The manhole cover with an inner cover according to claim 1, characterized in that: The size of the sealing plate (4) is equal to the size of the first observation hole (32).

6. The manhole cover with an inner cover according to claim 5, characterized in that: The driving mechanism (2) comprises a rotating handle (5) and a fixed shaft (24) provided on the support plate (31); the sealing plate (4) is provided on the rotating handle (5); and the rotating handle (5) is rotatably mounted on the fixed shaft (24).

7. The manhole cover with an inner cover according to claim 6, characterized in that: A shaft sleeve (26) is sleeved on the fixed shaft (24), the shaft sleeve (26) can slide along the fixed shaft (24), the shaft sleeve (26) can rotate around the fixed shaft (24), and the rotating handle (5) and the sealing plate (4) are arranged on the shaft sleeve (26).

8. The manhole cover with an inner cover according to claim 1, characterized in that: The driving mechanism (2) comprises a push plate (6) provided on the sealing plate (4), a guide rail (7) being provided on the support plate (31), and the push plate (6) is used to drive the sealing plate (4) to move along the guide rail (7) to block or avoid the first observation hole (32).

9. The manhole cover with an inner cover according to claim 8, characterized in that: A locking ring (42) is provided on the sealing plate (4), and a locking hook (8) is provided on the supporting plate (31). The locking hook (8) is used to hook the locking ring (42) to lock the sealing plate (4).

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