A new manhole sealing device
By combining the end cap body with the clamping rod using an eccentric block design, the problems of time-consuming disassembly and incomplete sealing of the inspection hole sealing device are solved, enabling rapid installation and disassembly and ensuring the reliability and safety of the seal.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANRUI GRP ZHENGZHOU CEMENT CO LTD
- Filing Date
- 2025-08-08
- Publication Date
- 2026-07-07
AI Technical Summary
Existing inspection hole sealing devices are time-consuming to install and disassemble, have poor sealing, and are prone to damage. In particular, bolt-type sealing methods suffer from problems such as improper tightening leading to poor sealing and bolt stripping failure.
The design adopts an eccentric block combined with the end cap body and the clamping rod, and uses the eccentric principle of the eccentric block to achieve a tight seal. The detachable connection of the snap-fit seat and the connecting rod simplifies the installation and disassembly process.
It enables quick installation and removal of inspection holes, ensuring reliable sealing, reducing labor intensity, and improving safety and work efficiency.
Smart Images

Figure CN224466633U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sealing device technology, specifically to a novel inspection hole sealing device. Background Technology
[0002] Inspection holes are reserved holes on containers for safety inspection and testing, such as manholes, handholes, and threaded pipe plug inspection holes. Manholes and handholes also serve the functions of installing internal parts and maintenance. Threaded pipe plug inspection holes are structures with pipe seats with standard tapered pipe threads and fitted with sealing plugs or caps. For safety reasons, containers with an inner diameter > 1000mm should have at least one manhole; containers with an inner diameter > 500mm should have one manhole or two handholes; containers with an inner diameter > 300mm should have two handholes. Inspection holes need to be sealed under normal conditions. Existing storage tank inspection hole seals mostly use bolt seals and cap seals. The installation and disassembly of bolt-fixed inspection holes are time-consuming. If the bolts are not tightened properly, leaks can easily occur due to poor sealing. Over-tightening the bolts can cause the cap to deform or the bolt threads to strip and fail. Replacing the fixing bolts or remaking the inspection hole is time-consuming and labor-intensive. Therefore, this technical solution is proposed for improvement. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of existing technologies where inspection holes are inconvenient to disassemble after sealing, and to provide a new type of inspection hole sealing device.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a novel inspection hole sealing device, comprising an end cap body disposed on an inspection hole of a tank, a snap-fit seat disposed on the side of the inspection hole of the tank, a pressing rod disposed above the end cap body, an eccentric block disposed at the end of the pressing rod, and the eccentric block being movably connected to the snap-fit seat.
[0005] Furthermore, an auxiliary block is provided on the side of the end cap body, a connecting hole is provided in the middle of the auxiliary block, a connecting rod is provided inside the connecting hole, and the bottom of the connecting rod is detachably connected to a connecting seat provided on the tank body.
[0006] Furthermore, an operating lever is provided at the middle position of the clamping rod, and an oblong hole is provided at the end of the operating lever for connection with the connecting rod.
[0007] Furthermore, two sets of the card holders are arranged opposite each other, and the upper part of the card holder is provided with a connection port, the bottom of the connection port being lower than the upper part of the end cap body.
[0008] Furthermore, the eccentric block is an arc-shaped block protruding from the side of the clamping rod, and the eccentric block is engaged inside the connection port.
[0009] Furthermore, a handle is provided at the middle position of the end cap body.
[0010] The beneficial effects of this utility model embodiment are as follows: A clamping rod is provided above the end cap body, and an eccentric block is provided at the end of the clamping rod. The eccentric block is an arc-shaped block protruding from the side of the clamping rod. By utilizing the eccentric principle of the eccentric block, the end cap body is subjected to downward pressure, thereby achieving a tight seal with the inspection hole of the tank. When it is necessary to open the end cap body for inspection or maintenance, the connecting rod is first removed, the operating rod is rotated in the opposite direction to make the eccentric block exit from the connection port, the connecting seat is then sealed first, and then the connecting rod is rotated to lift the end cap body upward to complete the disassembly. This solves the problems of time-consuming installation and disassembly, poor sealing, and easy damage in the existing inspection hole sealing method. It is simple to operate, has reliable sealing, and is convenient to install and disassemble, effectively improving the safety and work efficiency of the container inspection hole. Attached Figure Description
[0011] Figure 1 This is a top view of the structure of this utility model;
[0012] Figure 2 This is a side view of the structure of this utility model;
[0013] In the diagram: 1. End cap body; 101. Handle; 102. Auxiliary block; 2. Clamping rod; 201. Operating rod; 202. Eccentric block; 3. Snap-fit seat; 301. Connecting port; 4. Connecting rod; 401. Base. Detailed Implementation
[0014] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely for explaining the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.
[0015] See Figures 1 to 2 This utility model discloses a novel inspection hole sealing device, mainly including an end cap body 1 set on the inspection hole of the tank. The end cap body 1 is mainly rectangular. A sealing groove is provided at the lower part of the end cap body 1 to form a sealing effect with the protruding part on the inspection hole. A sealing strip is provided inside the sealing groove. A snap-fit seat 3 is provided on the side of the tank body of the inspection hole. Two sets of snap-fit seats 3 are arranged opposite each other. A connection port 301 is provided at the upper part of the snap-fit seat 3. The connection port 301 is a C-shaped opening, which facilitates the insertion of the clamping rod 2 from the side. The bottom of the connection port 301 is lower than the upper part of the end cap body 1, which provides a suitable space and position for the subsequent snap-fit of the eccentric block 202 and ensures the use effect.
[0016] A clamping rod 2 is provided on the top of the end cap body 1. An eccentric block 202 is provided at the end of the clamping rod 2. The eccentric block 202 is an arc-shaped block protruding from the side of the clamping rod 2, which can achieve a good snap-fit with the connection port 301 of the snap-fit seat 3. During actual installation, the eccentric block 202 is snapped into the inside of the connection port 301. By rotating the clamping rod 2, the eccentric principle of the eccentric block 202 applies downward pressure to the end cap body 1, thereby achieving a tight seal with the inspection hole of the tank. This sealing method is simple to operate, eliminating the need for cumbersome bolt tightening operations like traditional bolt seals, greatly saving installation and disassembly time. At least two sets of clamping rods 2 are provided along the length of the end cap body 1, arranged opposite each other to ensure sealing during tightening. To further enhance the stability of the connection between the end cap body 1 and the tank, an auxiliary block 102 is provided on the side of the end cap body 1. 102 is located on the other side of the end cap body 1. A connecting hole is provided in the middle of the auxiliary block 102. A connecting rod 4 is provided inside the connecting hole. The bottom of the connecting rod 4 is detachably connected to the connecting seat 401 provided on the tank body. The connecting rod 4, the auxiliary block 102, and the connecting seat 401 can be screwed together to facilitate control of the clamping strength. The detachable connection method can be flexibly operated according to actual needs. When it is necessary to open the end cap body 1 for inspection or maintenance, simply remove the connecting rod 4 from the connecting seat 401. During installation, connect the connecting rod 4 to the connecting seat 401 to ensure the end cap body 1 is stable on the tank body.
[0017] An operating rod 201 is located at the middle of the clamping rod 2. The end of the operating rod 201 has a slotted hole for connection with the connecting rod 4. This slotted hole provides sufficient space for the connection between the operating rod 201 and the connecting rod 4, making operation of the clamping rod 2 more flexible and convenient. When rotating the clamping rod 2 for sealing or releasing operations, the operating rod 201 can move within a certain range on the connecting rod 4 through the slotted hole, avoiding operational difficulties caused by structural limitations and improving the overall operational performance of the device. Furthermore, the operating rod 201 and the eccentric block 202 are connected by... The included angle setting allows for different degrees of downward pressure of the eccentric block 202 when rotating the operating rod 201, resulting in different effects when the clamping rod 2 and the connecting rod 4 are engaged. Furthermore, a nut can be installed on the connecting rod 4 above the auxiliary block 102 to further pressurize the side of the end cover body 1, ensuring a sealing effect, reducing the possibility of bolt stripping failure, and greatly improving the performance. When disassembling the end cover body 1, the connecting seat 401 can be sealed first, and then the connecting rod 4 can be rotated to lift the end cover body 1 upwards to complete the disassembly, reducing labor intensity.
[0018] In addition, a handle 101 is provided in the middle of the end cap body 1. The handle 101 makes it convenient for workers to carry and operate the end cap body 1. Especially when opening or closing the end cap body 1, workers can apply force by holding the handle 101 to complete the operation more easily, which further improves work efficiency.
[0019] In practical use, when sealing the inspection hole of the container is required, first place the end cap body 1 on the inspection hole of the tank body, ensuring that the end cap body 1 is aligned with the inspection hole. Then, insert the eccentric block 202 at the end of the clamping rod 2 into the connection port 301 of the snap-fit seat 3. By rotating the operating rod 201, the clamping rod 2 is rotated. The eccentric action of the eccentric block 202 causes the end cap body 1 to be subjected to downward pressure, thereby achieving a tight seal with the inspection hole of the tank body. Then, pass the connecting rod 4 through the oblong hole and the auxiliary block to connect it to the connecting seat 401 on the tank body, which serves as a preliminary positioning and fixing function. Finally, lock the connecting rod. 4. To control the sealing effect, when it is necessary to open the end cover body 1 for inspection or maintenance, first remove the connecting rod 4, rotate the operating rod 201 in the opposite direction to make the eccentric block 202 exit from the connection port 301, then seal the connecting seat 401 first, then rotate the connecting rod 4 to lift the end cover body 1 upwards to complete the disassembly. Hold the handle 101 to remove the end cover body 1 from the inspection hole. This solves the problems of time-consuming installation and disassembly, poor sealing, and easy damage in the existing inspection hole sealing methods. It is simple to operate, has reliable sealing, and is convenient to install and disassemble, effectively improving the safety and work efficiency of container inspection holes.
[0020] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0021] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0022] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.
[0023] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.
Claims
1. A novel inspection hole sealing device, comprising an end cap body disposed on an inspection hole of a tank, characterized in that: A snap-fit seat is provided on the side of the inspection hole of the tank body, and a clamping rod is provided on the top of the end cover body. An eccentric block is provided at the end of the clamping rod, and the eccentric block is movably connected to the snap-fit seat.
2. The novel inspection hole sealing device according to claim 1, characterized in that: An auxiliary block is provided on the side of the end cap body, and a connecting hole is provided in the middle of the auxiliary block. A connecting rod is provided inside the connecting hole, and the bottom of the connecting rod is detachably connected to a connecting seat provided on the tank body.
3. The novel inspection hole sealing device according to claim 2, characterized in that: An operating lever is provided at the middle position of the clamping rod, and an oblong hole is provided at the end of the operating lever for connection with the connecting rod.
4. The novel inspection hole sealing device according to claim 1, characterized in that: Two sets of card holders are arranged opposite each other. The upper part of the card holder is provided with a connection port, and the bottom of the connection port is lower than the upper part of the end cap body.
5. The novel inspection hole sealing device according to claim 4, characterized in that: The eccentric block is an arc-shaped block that protrudes from the side of the clamping rod, and the eccentric block is engaged inside the connection port.
6. The novel inspection hole sealing device according to claim 1, characterized in that: A handle is provided in the middle of the end cap body.