Well lid with multiple transmission

Abstract

The present application provides a kind of well lid with multi-connected transmission device, belong to well lid technical field, including for fitting installation in the lid body of well mouth, further include for fastening the transmission device in the installation step of lid body in the well mouth, and several slide rods, all slide rods are arranged in the form of annular array below the lid body, slide rod can slide along the radial of well, when driving the overall rotation of transmission device, all slide rods extend towards well wall, and at least part of slide rod can be supported on well wall, to fix the well lid.The present application adopts multiple transmission structures, ingeniously carries out linkage adjustment installation, can be quickly and conveniently installed, at the same time, fully guarantee the firmness, reliability of well lid.

Description

Technical Field

[0001] This invention relates to the field of manhole cover technology, and in particular to a manhole cover with a multi-drive transmission device. Background Technology

[0002] In roads, squares, and other locations, drainage or sewage wells are installed for drainage purposes. With social development and improved urban construction standards, many sewage or drainage wells are now constructed using concrete pouring or mortar leveling to improve drainage efficiency and prevent collapse and blockage due to loose soil. However, for the crucial supporting facility of manhole covers, most are still round cast iron covers, primarily made of ductile iron. Therefore, unlike machined disc-shaped parts, their diameter has a significant tolerance, and the setting of the manhole opening also has considerable tolerance, not accurate to the millimeter level. To ensure installation... When installing manhole covers, the fit between the cover and the manhole opening is usually a relatively large clearance. Currently, manhole covers are typically installed by simply dropping them onto the mounting platform at the manhole opening. This method is simple and easy to implement. However, in daily life, a problem often arises: these manhole covers, regardless of their installation location, tend to become noticeably loose, sometimes to a considerable degree. This causes many covers to warp, creating significant safety hazards. Furthermore, because the covers can be easily pulled out, some are displaced, occasionally resulting in falls or theft. Summary of the Invention

[0003] The purpose of this invention is to provide a manhole cover with a multi-drive device to solve the technical problem that the installation of manhole covers is not secure enough in the prior art.

[0004] To achieve the above objectives, the present invention provides a manhole cover with a multi-drive mechanism, comprising a cover body for fitting into and installing at the manhole opening, a drive mechanism for fastening the cover body within an installation step at the manhole opening, and a plurality of sliding rods arranged in a circular array below the cover body. The sliding rods are slidable along the radial direction of the manhole. When the drive mechanism is rotated as a whole, all sliding rods extend toward the manhole wall, and at least some of the sliding rods are able to press against the manhole wall to fix the manhole cover.

[0005] Furthermore, the transmission device includes a threaded transmission component and a mounting block, the mounting block being located below the center of the bottom of the cover, and one end of the slide rod being slidably mounted in the mounting block;

[0006] The threaded transmission component includes a driving stud and a driven threaded sleeve. The driving stud is rotatably mounted on the central axis of the cover body, and the top end of the driven threaded sleeve is threadedly engaged with the bottom end of the driving stud. The two are connected as one unit by the elastic force of a coaxially arranged cylindrical bearing spring, so that the driving stud and the driven threaded sleeve will not rotate relative to each other within a set torque range. When the driving stud is driven to rotate, the entire threaded transmission component will rotate synchronously with it.

[0007] Furthermore, the driven threaded sleeve has a cylindrical cavity with an open top at its upper end, and the open end of the cylindrical cavity has a stop portion; the bottom end of the driving stud has an annular limiting disc, the top of the cylindrical bearing spring located in the cylindrical cavity, and the limiting disc slidingly installed in the cylindrical cavity abuts against the limiting disc, and the limiting disc is in close contact with the inner end face of the stop portion.

[0008] Furthermore, the driven threaded sleeve has several protrusions arranged in a ring array on the circumferential direction at the bottom end. The outer surface of each protrusion includes an involute surface. When the driven threaded sleeve rotates synchronously in the forward direction with the threaded transmission component, each involute surface pushes one end of the slide rod that is in contact with it outward so as to abut against the well wall.

[0009] Furthermore, a stop block is fixed to one end of the slide rod, and the stop block is connected to the inner cavity wall of the mounting block into which the slide rod is slidably inserted by a return spring, so that when the threaded transmission component rotates in the reverse direction, all slide rods can be pulled back to the mounting block by the return spring, thereby realizing the reset of the slide rod.

[0010] Furthermore, each sliding rod is provided with a slot along its length, and a guide rod is slidably installed through each slot. The top end of the guide rod is slidably installed in a groove opened on the bottom end face of the cover, and the groove is arranged along the radial direction of the cover.

[0011] When the slide rod comes into contact with the well wall, the driven threaded sleeve can no longer rotate in the forward direction, causing relative threaded transmission between the driving stud and the driven stud. Under the restriction of the guide rod, the driven threaded sleeve can only move upward, so that all the slide rods can move upward and then firmly fit against the end face of the well wall stop below the mounting step.

[0012] Beneficial effects: The manhole cover described in this invention, in addition to the traditional manhole cover form, is specially equipped with a corresponding transmission device to achieve quick, firm and reliable installation of the manhole cover. Simply place the cover over the manhole opening, stand directly on the cover to pre-tighten it, and then rotate the threaded transmission component to make multiple sliding rods extend radially inside the manhole and abut against the manhole wall, thereby achieving a fixed connection of the manhole cover. Since the manhole cover is actually not just a thin disc structure, but has an array of sliding rods that can be hooked and attached to the inside of the manhole, it effectively prevents the cover from falling off the manhole opening and avoids the safety hazards caused by significant displacement of the manhole cover. Moreover, this installation structure, which clamps the cover and the sliding rod between the wellhead mounting platform and the well wall stop end face, can largely ensure that the cover does not shake at the wellhead. It can even be locked directly on the active stud, or a special wrench slot can be set on the nut of the active stud, so that ordinary tools cannot turn the active stud. All of these can play a certain degree of anti-theft effect, and cannot be easily hooked and dragged away like existing well covers.

[0013] Moreover, even if the construction error of the well opening size is extremely large, the cover can still be firmly installed due to the telescopic effect of the sliding rod, making it more adaptable. However, if a traditional well cover encounters a large error in the well opening size, the installation of the well cover will be obviously loose, and even some of its edges may fall into the well, causing the well cover to tilt upwards and easily be overturned by pedestrians. Attached Figure Description

[0014] The accompanying drawings used in the following description of the embodiments or prior art will be briefly introduced. The drawings in the following description are only some embodiments of the present invention and do not represent all specific structures or principles.

[0015] Figure 1 This is a schematic diagram of an installation structure according to the present invention;

[0016] Figure 2 This is a schematic diagram showing the separation between the mounting block and the cover before the cover is secured to the wellhead;

[0017] Figure 3 This is a partial top view of the structure of the driven threaded sleeve and the sliding rod.

[0018] The following are the labels in the diagram: Well wall 1, Well wall stop end face 101, Well opening 2, Installation step 201, Cover body 3, Threaded transmission component 4, Driving stud 401, Driven threaded sleeve 402, Protrusion 4021, Involute surface 402101, Cylindrical bearing spring 403, Limiting plate 404, Stop part 405, Mounting block 5, Inner cavity 501, Slide rod 6, Stop block 601, Return spring 7, Guide rod 8. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-2 The manhole cover with multi-drive device in this embodiment mainly includes a cover body 3 for fitting into the manhole opening 2. This cover body 3 can be regarded as a conventional manhole cover, that is, a simple round cast iron cover. The difference is that the manhole cover in this embodiment also includes a drive device for fastening the cover body 3 into the installation step 201 of the manhole opening 2, as well as several sliding rods 6. The sliding rods 6 are mainly used to fix the manhole cover to avoid the problem of unstable installation that often occurs when using traditional manhole cover installation. Specifically, in this embodiment, all the sliding rods 6 are arranged in a circular array and evenly distributed below the cover 3. These sliding rods 6 can slide along the radial direction of the well. When the installer rotates the entire drive transmission device, all the sliding rods 6 can extend toward the well wall 1, and at least some of the sliding rods 6 can press against the well wall 1. For wells used in standard operations, all the sliding rods 6 can press against the well wall 1 to better fix the well cover and prevent it from loosening. In particular, it avoids the bad situation where the well cover is much smaller than the well opening 2 because it is easy to install, which could cause the well cover to even flip 30 degrees or more.

[0021] As one of the specific implementation details, please refer to [link / reference]. Figure 1-2 This transmission device includes a threaded transmission component 4 and a mounting block 5. The mounting block 5 is located below the center of the bottom of the cover 3. One end of the slide rod 6 is slidably installed in the mounting block 5 so as to slide and extend along the radial directions of the well. Meanwhile, the threaded transmission component 4 in this embodiment specifically includes a driving stud 401 and a driven threaded sleeve 402. The driving stud 401 is rotatably installed on the central axis of the cover 3, while the top end of the driven threaded sleeve 402 is threadedly engaged with the bottom end of the driving stud 401. That is, the two are threadedly connected, forming a threaded connection, and also require installation via their threaded pair, which will be explained in detail later. Furthermore, the driving stud 401 and the driven threaded sleeve 402 can actually perform the aforementioned threaded pair transmission under specific conditions, while under normal conditions, they are a single unit; if one of them is rotated, the entire threaded transmission component 4 rotates. Specifically, as... Figure 2As shown, the cylindrical bearing spring 403, which is set on the same axis, is connected as a whole by its elasticity. Because of the elasticity, the two are pressed together by the axis and become a whole. This ensures that the threaded transmission component 4 will not rotate relative to each other within the set torque range. At this time, when the driving stud 401 is driven to rotate, the entire threaded transmission component 4 will rotate synchronously with it, and the above-mentioned threaded transmission pair will not operate.

[0022] Furthermore, based on the above structure, a cylindrical cavity with an open top needs to be machined at the upper end of the driven threaded sleeve 402, and the open end of the cylindrical cavity has a stop portion 405. At the same time, the bottom end of the driving stud 401 has an annular limiting disc 404, and the top of the cylindrical bearing spring 403 located in the cylindrical cavity abuts against the limiting disc 404 which is slidably installed in the cylindrical cavity. Moreover, the limiting disc 404 is in close contact with the inner end face of the stop portion 405, so that the driving stud 401 and the driven threaded sleeve 402 can be a whole under normal conditions, and there is no relative movement between the two.

[0023] Continue reading Figure 2 In order to drive all slide rods 6 to extend from mounting block 5 when driven threaded sleeve 402 rotates, in particular, as Figure 3 As shown, several protrusions 4021 are arranged in a ring array on the circumferential direction at the bottom end of the driven threaded sleeve 402. The outer surface of each protrusion 4021 includes an involute surface 402101. When the driven threaded sleeve 402 rotates synchronously in the forward direction with the threaded transmission component 4, one end of the slide rod 6 that is in contact with each involute surface 402101 will naturally move outward and be pushed outward. Finally, the free end of the slide rod 6 abuts against the well wall 1 and gets stuck on the well wall 1. At this time, the driven threaded sleeve 402 will be unable to continue rotating.

[0024] In addition, such as Figure 2A stop block 601 is fixed to one end of the slide rod 6. The stop block 601 and the inner cavity 501 of the mounting block 5 into which the slide rod 6 is slidably inserted can be connected by a return spring 7, so that when the threaded transmission component 4 rotates in the reverse direction, all slide rods 6 can be pulled back to the mounting block 5 by the return spring 7, thereby realizing the reset of the slide rod 6. In addition, a slot is opened along the length direction of each slide rod 6, and a guide rod 8 is slidably installed through each slot. The top end of the guide rod 8 is slidably installed in a groove opened on the bottom end face of the cover 3. The groove is arranged radially along the cover 3. As long as the cover 3 is pre-pressed and stationary, the slide rod 6 can only move along the direction of the groove under the restriction of the guide rod 8, so that the slide rod 6 can extend and retract. When the slide rod 6 comes into contact with the well wall 1, the driven threaded sleeve 402 can no longer continue to rotate in the forward direction. Therefore, the internal rotation of the threaded transmission component 4 will occur, overcoming the elastic force of the cylindrical compression spring, so that the driving stud 401 and the driven stud will have relative threaded transmission, which can move along the axis. Under the restriction of the guide rod 8, the well cover is pre-pressed and cannot move. The driven threaded sleeve 402 can only move upward. During the upward movement of the slide rod 6, it will be firmly attached to the end face 101 of the well wall 1 below the installation step 201, so that the driving stud 401 is tightened and the cover 3 is firmly fixed on the well opening 2, which is not easy to overturn.

[0025] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A manhole cover with a multi-drive mechanism, comprising a cover body (3) for fitting into a manhole opening (2), characterized in that, It also includes a transmission device for fastening the cover (3) in the mounting step (201) of the wellhead (2), and a number of slide rods (6). All slide rods (6) are arranged in a circular array below the cover (3). The slide rods (6) can slide along the radial direction of the well. When the transmission device is driven to rotate as a whole, all slide rods (6) extend toward the well wall (1), and at least some slide rods (6) can press against the well wall (1) to fix the well cover. The transmission device has a threaded transmission component (4) and a mounting block (5). The mounting block (5) is located below the center of the bottom of the cover (3). One end of the slide rod (6) is slidably installed in the mounting block (5). The threaded transmission component (4) includes a driving stud (401) and a driven threaded sleeve (402). The driving stud (401) is rotatably mounted on the central axis of the cover (3). The top end of the driven threaded sleeve (402) is threadedly fitted to the bottom end of the driving stud (401). The two are connected by the elastic force of a coaxial cylindrical bearing spring (403) so that the driving stud (401) and the driven threaded sleeve (402) will not rotate relative to each other within the set torque range. When the driving stud (401) is driven to rotate, the entire threaded transmission component (4) will rotate synchronously with it. The driven threaded sleeve (402) has a cylindrical cavity with an open top at its upper end, and the open end of the cylindrical cavity has a stop (405); the bottom end of the driving stud (401) has an annular limiting disc (404), and the limiting disc (404) is located at the top of the cylindrical bearing spring (403) inside the cylindrical cavity. The stop (405) abuts against the limiting disc (404) which is slidably installed inside the cylindrical cavity, and the limiting disc (404) is in close contact with the inner end face of the stop (405). The driven threaded sleeve (402) has a number of protrusions (4021) arranged in a ring array on the circumferential direction at the bottom end. The outer surface of each protrusion (4021) includes an involute surface (402101). When the driven threaded sleeve (402) rotates synchronously in the forward direction with the threaded transmission component (4), each involute surface (402101) pushes one end of the slide rod (6) that is in contact with it outward so as to abut against the well wall (1).

2. The manhole cover with multi-drive device according to claim 1, characterized in that, A stop block (601) is fixed on one end of the slide rod (6). The stop block (601) is connected to the inner cavity wall (501) of the mounting block (5) into which the slide rod (6) is slidably inserted by a return spring (7). When the threaded transmission component (4) rotates in the reverse direction, all slide rods (6) can be pulled by the return spring (7) and retracted into the mounting block (5) to achieve the reset of the slide rod (6).

3. The manhole cover with multi-drive device according to claim 1, characterized in that, Each slide rod (6) is also provided with a slot along its length, and a guide rod (8) is slidably installed through each slot. The top end of the guide rod (8) is slidably installed in a groove opened on the bottom surface of the cover (3), and the groove is arranged along the radial direction of the cover (3). When the slide rod (6) comes into contact with the well wall (1), the driven threaded sleeve (402) can no longer continue to rotate in the forward direction, so that the driving stud (401) and the driven threaded sleeve undergo relative thread transmission. Under the restriction of the guide rod (8), the driven threaded sleeve (402) can only move upward, so that all the slide rods (6) can move upward and then firmly fit against the well wall stop end face (101) below the mounting step (201).

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