Wellhead sealing device for underground water monitoring

Abstract

The utility model discloses an underground water monitoring well mouth sealing device, which relates to the technical field of underground water monitoring well mouth protection, and comprises a well mouth outer protection cylinder, a sealing mechanism is arranged above the well mouth outer protection cylinder, the sealing mechanism comprises a supporting plate and a limiting disc, and the lower surface of the supporting plate is fixedly connected with two mutually symmetrical connecting rods. The well mouth sealing device is reasonable in design structure, the rubber plug can be pulled out from the inside of the well mouth outer casing by rotating the threaded ring clockwise, then the supporting plate is rotated backwards, the limiting disc and the rubber plug are moved to the rear side of the well mouth outer casing, sealing of a well mouth can be quickly relieved, and on the contrary, the well mouth can be sealed through operation. The purpose of conveniently sealing the well mouth is achieved, and the problems that in the prior art, an underground water monitoring well mouth sealing device generally adopts a plurality of bolts, sealing gaskets and flange plates to seal the detected well mouth, disassembly and assembly are inconvenient, time and labor are wasted, the operation efficiency is reduced, and the operation cost is increased are solved.

Description

Technical Field

[0001] This utility model relates to the field of groundwater monitoring wellhead protection technology, specifically a groundwater monitoring wellhead sealing device. Background Technology

[0002] Groundwater monitoring wellhead sealing devices are core components ensuring the accuracy and long-term stable operation of groundwater monitoring data. Their technological development focuses on optimizing material performance and innovating structural functions. Currently, most mainstream sealing devices employ a collaborative design of composite polymer materials and mechanical structures. Through highly elastic, corrosion-resistant modified rubber or silicone-based composite materials, combined with a multi-layered, stacked sealing ring structure, they effectively address the sealing challenges posed by groundwater temperature variations, chemical erosion, and micro-deformation of the well casing. In terms of mechanical structure, modular, quick-installation sealing components are becoming a technological trend. Utilizing a preload adaptive adjustment mechanism and flange locking system, they enable rapid installation and non-destructive maintenance without damaging the well casing. They are also equipped with annular drainage channels and anti-seepage baffles to prevent backflow of surface runoff. Some advanced devices integrate fiber optic sensors or pressure sensing units to monitor the stress distribution and leakage risk at the sealing interface in real time, optimizing sealing performance through data feedback.

[0003] While existing groundwater monitoring wellhead sealing devices significantly improve the reliability of dynamic sealing in complex geological environments through the deep integration of materials, structure, and monitoring technology, providing key technical support for the standardized construction and long-term operation and maintenance of groundwater monitoring networks, they generally rely on multiple bolts, gaskets, and flanges to seal the wellhead. This method is inconvenient to install and disassemble, time-consuming, labor-intensive, reduces operational efficiency, and increases operating costs. Therefore, we provide a groundwater monitoring wellhead sealing device that addresses these issues. Utility Model Content

[0004] 1) Technical problems to be solved

[0005] This utility model proposes a sealing device for groundwater monitoring wellheads. Through the cooperation between the support plate, connecting rod, rotating block, sliding hole, through hole, sliding rod, limiting block, limiting disc, rubber plug, sealing ring, threaded rod, threaded ring, and limiting hole, it solves the problems of existing groundwater monitoring wellhead sealing devices, which generally use multiple bolts, gaskets, and flanges to seal the wellhead. These devices are inconvenient to assemble and disassemble, time-consuming and labor-intensive, reduce work efficiency, and increase work costs.

[0006] (ii) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a groundwater monitoring wellhead sealing device, comprising an outer casing for the wellhead, a sealing mechanism provided above the outer casing, the sealing mechanism comprising a support plate and a limiting plate, two mutually symmetrical connecting rods fixedly connected to the lower surface of the support plate, rotating blocks rotatably connected to the bottom of the two connecting rods on one side, two mutually symmetrical sliding holes opened on the upper surface of the support plate, a through hole opened on the upper surface of the support plate, sliding rods slidably connected to the inner walls of the two sliding holes, and a limiting block fixedly connected to the top of the sliding rods;

[0008] A rubber plug is fixedly installed on the lower surface of the limiting plate, a sealing ring is fixedly installed on the lower surface of the limiting plate, a threaded rod is fixedly connected to the upper surface of the limiting plate, the top end of the threaded rod passes through a through hole and is threadedly connected to a threaded ring, and a set of equidistant concentric limiting holes are opened on the upper surface of the threaded ring.

[0009] Furthermore, the bottom end of the wellhead outer casing is fixedly connected to the wellhead with cement, and the side of the rotating block near the wellhead outer casing is fixedly connected to the outer surface of the wellhead outer casing.

[0010] Furthermore, the upper surface of the limiting disc is fixedly connected to the bottom end of the slide rod, the outer surface of the rubber plug is in contact with the inner wall of the wellhead outer casing, and the lower surface of the threaded ring is rotatably connected to the upper surface of the support plate.

[0011] Furthermore, a limiting mechanism is provided above the sealing mechanism. The limiting mechanism includes a support frame, the lower surface of which is fixedly connected to the upper surface of the support plate, and a second through hole is provided on the upper surface of the support frame.

[0012] Furthermore, the inner top wall of the support frame is fixedly connected to two mutually symmetrical sliding cylinders, and the bottom end of each of the two sliding cylinders is provided with a sliding cavity.

[0013] Furthermore, an elastic element is fixedly connected to the inner top wall of the sliding cavity, and a sliding rod is fixedly connected to the bottom end of the elastic element. The outer surface of the sliding rod is slidably connected to the inner side wall of the sliding cavity.

[0014] Furthermore, a limiting ring is fixedly connected to the bottom end of the sliding rod, and a set of equidistant and concentric limiting posts are fixedly connected to the lower surface of the limiting ring, with each of the limiting posts being inserted into a limiting hole.

[0015] (iii) Beneficial effects:

[0016] Compared with existing technologies, this groundwater monitoring wellhead sealing device has the following advantages:

[0017] I. This groundwater monitoring wellhead sealing device allows the rubber plug to be pulled out from inside the wellhead outer casing by rotating the threaded ring clockwise. Then, rotating the support plate backward moves the limiting plate and the rubber plug to the rear side of the wellhead outer casing, quickly releasing the wellhead seal. Conversely, rotating clockwise seals the wellhead. This device achieves the purpose of conveniently sealing the wellhead and solves the problem that existing groundwater monitoring wellhead sealing devices generally use multiple bolts, gaskets, and flanges to seal the wellhead, which is inconvenient to disassemble and assemble, time-consuming and labor-intensive, reduces operational efficiency, and increases operating costs.

[0018] II. This groundwater monitoring wellhead sealing device uses an external force to push the limiting ring upward, which in turn drives the sliding rod to slide upward inside the sliding cavity. At the same time, it causes the limiting pin to move out of the limiting hole and applies a compressive force to the elastic element, which can release the threaded ring from its limiting position. After the wellhead is sealed, the external force acting on the limiting ring is released. Under the elastic characteristics of the elastic element, the limiting pin is driven to insert into the limiting hole to limit the threaded ring. This achieves the purpose of convenient threaded ring limiting in this device and solves the problem of the threaded ring rotating unexpectedly due to external force, causing the wellhead to not seal properly. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a three-dimensional front view structural diagram of the present invention;

[0021] Figure 2 This is a three-dimensional structural exploded view of the sealing mechanism of this utility model;

[0022] Figure 3 This is a three-dimensional structural exploded view of the limiting mechanism of this utility model;

[0023] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0024] In the diagram: 1. Outer casing at the wellhead; 2. Sealing mechanism; 201. Support plate; 202. Connecting rod; 203. Rotating block; 204. Sliding hole; 205. Through hole; 206. Sliding rod; 207. Limiting block; 208. Limiting disc; 209. Rubber plug; 210. Sealing ring; 211. Threaded rod; 212. Threaded ring; 213. Limiting hole; 3. Limiting mechanism; 301. Support frame; 302. Second through hole; 303. Sliding cylinder; 304. Sliding cavity; 305. Elastic element; 306. Sliding rod; 307. Limiting ring; 308. Limiting column. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1-4 As shown, this utility model provides a technical solution: a groundwater monitoring wellhead sealing device, including a wellhead outer casing 1, a sealing mechanism 2 above the wellhead outer casing 1, the sealing mechanism 2 including a support plate 201 and a limiting plate 208, two mutually symmetrical connecting rods 202 fixedly connected to the lower surface of the support plate 201, and rotating blocks 203 rotatably connected to the bottom of the two connecting rods 202 on one side, two mutually symmetrical sliding holes 204 opened on the upper surface of the support plate 201, a through hole 205 opened on the upper surface of the support plate 201, sliding rods 206 slidably connected to the inner sidewalls of the two sliding holes 204, a limiting block 207 fixedly connected to the top of the sliding rod 206, and a limiting plate 207 fixedly installed on the lower surface of the limiting plate 208. The device includes a rubber plug 209, a sealing ring 210 fixedly installed on the lower surface of the limiting plate 208, a threaded rod 211 fixedly connected to the upper surface of the limiting plate 208, a threaded ring 212 threadedly connected to the top of the threaded rod 211 through a through hole 205, and a set of equidistant concentric limiting holes 213 opened on the upper surface of the threaded ring 212. The bottom end of the wellhead outer casing 1 is fixedly connected to the wellhead with cement. The side of the rotating block 203 near the wellhead outer casing 1 is fixedly connected to the outer surface of the wellhead outer casing 1. The upper surface of the limiting plate 208 is fixedly connected to the bottom end of the sliding rod 206. The outer surface of the rubber plug 209 is in contact with the inner wall of the wellhead outer casing 1. The lower surface of the threaded ring 212 is rotatably connected to the upper surface of the support plate 201.

[0027] The diameter of the threaded rod 211 here is smaller than the diameter of the through hole 205, and the diameter of the threaded rod 211 here is smaller than the diameter of the second through hole 302.

[0028] By rotating the threaded ring 212 clockwise, the threaded rod 211 moves upward, simultaneously causing the two symmetrical sliding rods 206 to slide upward and the limiting plate 208 to move vertically upward. This allows the rubber plug 209 to be pulled out from inside the wellhead outer casing 1. Then, by rotating the support plate 201 backward, the limiting plate 208 and the rubber plug 209 are moved to the rear side of the wellhead outer casing 1, which can quickly release the wellhead seal. Conversely, the operation can seal the wellhead. This device achieves the purpose of conveniently sealing the wellhead and solves the problem that existing groundwater monitoring wellhead sealing devices generally use multiple bolts, gaskets, and flanges to seal the wellhead, which is inconvenient to disassemble and assemble, time-consuming and labor-intensive, reduces work efficiency, and increases operating costs.

[0029] A limiting mechanism 3 is provided above the sealing mechanism 2. The limiting mechanism 3 includes a support frame 301. The lower surface of the support frame 301 is fixedly connected to the upper surface of the support plate 201. A second through hole 302 is opened on the upper surface of the support frame 301. Two mutually symmetrical sliding cylinders 303 are fixedly connected to the inner top wall of the support frame 301. A sliding cavity 304 is opened at the bottom end of each of the two sliding cylinders 303. An elastic element 305 is fixedly connected to the inner top wall of the sliding cavity 304. A sliding rod 306 is fixedly connected to the bottom end of the elastic element 305. The outer surface of the sliding rod 306 is slidably connected to the inner side wall of the sliding cavity 304. A limiting ring 307 is fixedly connected to the bottom end of the sliding rod 306. A set of equidistant concentric limiting posts 308 are fixedly connected to the lower surface of the limiting ring 307. All of the limiting posts 308 are inserted into the limiting hole 213.

[0030] The diameter of the hole in the limiting ring 307 is larger than the diameter of the threaded rod 211, and the material of the elastic element 305 is preferably a spring.

[0031] By applying an external force to push the limiting ring 307 upward, the sliding rod 306 slides upward inside the sliding cavity 304, while the limiting pin 308 moves out of the limiting hole 213. The elastic element 305 is compressed, which releases the limiting force on the threaded ring 212. After the wellhead is sealed, the external force on the limiting ring 307 is released. Under the elastic characteristics of the elastic element 305, the limiting pin 308 is inserted into the limiting hole 213 to limit the threaded ring 212. This achieves the purpose of limiting the threaded ring 212, and solves the problem of the threaded ring 212 rotating unexpectedly due to external force, causing poor wellhead sealing.

[0032] Working principle: In use, an external force is first applied to push the limiting ring 307 upward, which in turn causes the sliding rod 306 to slide upward inside the sliding cavity 304. Simultaneously, the limiting pin 308 moves out of the limiting hole 213, and the elastic element 305 is compressed, releasing the threaded ring 212 from its limiting position. After wellhead sealing, the external force on the limiting ring 307 is released. Under the elastic properties of the elastic element 305, the limiting pin 308 is inserted into the limiting hole 213, limiting the threaded ring 212. This achieves the purpose of conveniently limiting the threaded ring 212. When the limiting mechanism 3 releases the limiting of the sealing mechanism 2, the threaded ring 212 is rotated clockwise, which in turn drives the threaded rod 211 to move upward. At the same time, the two mutually symmetrical sliding rods 206 slide upward, and the limiting plate 208 moves vertically upward, so that the rubber plug 209 is pulled out from the inside of the wellhead outer casing 1. Then, the support plate 201 is rotated backward, which moves the limiting plate 208 and the rubber plug 209 to the rear side of the wellhead outer casing 1, which can quickly release the wellhead seal. The reverse operation can seal the wellhead, thus achieving the purpose of convenient wellhead sealing of this device.

[0033] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to 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.

[0034] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A groundwater monitoring wellhead sealing device comprising a wellhead casing (1), characterised in that: A sealing mechanism (2) is provided above the wellhead outer casing (1). The sealing mechanism (2) includes a support plate (201) and a limiting plate (208). Two mutually symmetrical connecting rods (202) are fixedly connected to the lower surface of the support plate (201). Rotating blocks (203) are rotatably connected to the bottom of the two connecting rods (202) on one side. Two mutually symmetrical sliding holes (204) are opened on the upper surface of the support plate (201). A through hole (205) is opened on the upper surface of the support plate (201). Sliding rods (206) are slidably connected to the inner walls of the two sliding holes (204). A limiting block (207) is fixedly connected to the top of the sliding rod (206). A rubber plug (209) is fixedly installed on the lower surface of the limiting plate (208), a sealing ring (210) is fixedly installed on the lower surface of the limiting plate (208), a threaded rod (211) is fixedly connected to the upper surface of the limiting plate (208), the top end of the threaded rod (211) passes through a through hole (205) and is threadedly connected to a threaded ring (212), and a set of equidistant concentric limiting holes (213) are opened on the upper surface of the threaded ring (212).

2. A groundwater monitoring wellhead seal apparatus as claimed in claim 1, wherein: The bottom end of the wellhead outer casing (1) is fixedly connected to the wellhead by cement, and the rotating block (203) is fixedly connected to the outer surface of the wellhead outer casing (1) on one side near the wellhead outer casing (1).

3. A groundwater monitoring wellhead seal apparatus as claimed in claim 2, wherein: The upper surface of the limiting plate (208) is fixedly connected to the bottom end of the slide rod (206), the outer surface of the rubber plug (209) is in contact with the inner wall of the wellhead outer casing (1), and the lower surface of the threaded ring (212) is rotatably connected to the upper surface of the support plate (201).

4. The groundwater monitoring wellhead sealing device according to claim 3, characterized in that: A limiting mechanism (3) is provided above the sealing mechanism (2). The limiting mechanism (3) includes a support frame (301). The lower surface of the support frame (301) is fixedly connected to the upper surface of the support plate (201). A second through hole (302) is provided on the upper surface of the support frame (301).

5. A groundwater monitoring wellhead sealing device according to claim 4, characterized in that: The inner top wall of the support frame (301) is fixedly connected to two mutually symmetrical sliding cylinders (303), and the bottom end of each of the two sliding cylinders (303) is provided with a sliding cavity (304).

6. A groundwater monitoring wellhead sealing device according to claim 5, characterized in that: An elastic element (305) is fixedly connected to the inner top wall of the sliding cavity (304), and a sliding rod (306) is fixedly connected to the bottom end of the elastic element (305). The outer surface of the sliding rod (306) is slidably connected to the inner side wall of the sliding cavity (304).

7. A groundwater monitoring wellhead sealing device according to claim 6, characterized in that: The bottom end of the sliding rod (306) is fixedly connected to a limiting ring (307), and a set of equidistant concentric limiting posts (308) are fixedly connected to the lower surface of the limiting ring (307), and all of the limiting posts (308) are inserted into the limiting hole (213).

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