Continuous and automatic quick opening device for hand hole cover of sand filter

Abstract

The utility model discloses a quick-opening device for a hand hole cover of a continuous automatic sand filter, and relates to the technical field of sand filters, the quick-opening device comprises a sand filter shell and a quick-opening assembly, the top of the sand filter shell is fixedly connected with a top cover, the quick-opening assembly is arranged on the upper surface of the top cover, the quick-opening assembly comprises a bearing cylinder, and the bearing cylinder is fixedly connected with the sand filter shell. The bearing cylinder is fixedly connected to the upper surface of the top cover, a hand hole cover is connected to the inner wall of the bearing cylinder in an inserted mode and used for sealing the bearing cylinder, a rotary locking assembly used for rotating the hand hole cover is arranged on the outer wall of the bearing cylinder, and the rotary locking assembly comprises a rotary quick-opening lantern ring. According to the utility model, the hand hole cover can be easily unlocked and opened by rotating the quick-opening lantern ring, the operation is simple, complicated tools are not needed, the time and manpower required for opening the hand hole cover are greatly saved, the working efficiency of equipment maintenance is improved, and the operation such as inspection, maintenance and cleaning of the interior of the continuous automatic sand filter is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of sand filter technology, specifically to a quick-opening device for the hand hole cover of a continuous automatic sand filter. Background Technology

[0002] In industrial water treatment and many other fields involving fluid filtration and purification, continuous automatic sand filters are one of the key pieces of equipment. Traditional continuous automatic sand filter handhole cover designs and their associated opening and closing mechanisms have many inconveniences and shortcomings.

[0003] In terms of ease of operation, traditional handhole covers typically use bolts or complex snap-fit ​​structures for sealing and securing. For example, common bolt tightening methods require operators to use tools to tighten or loosen multiple bolts one by one, a process that is extremely tedious and time-consuming. In the maintenance of large sand filter equipment clusters, frequent operation of multiple handhole covers can significantly impact overall production efficiency due to accumulated time costs. Moreover, this method demands a high level of skill from operators, as even slight errors can lead to bolt damage or uneven sealing. Furthermore, in situations with limited space or emergency repairs, traditional tool operation is difficult to implement, further exacerbating the operational challenges.

[0004] In terms of sealing performance, traditional handhole cover sealing structures are relatively simple. They often rely solely on the contact between a simple rubber gasket or sealing pad and the housing to achieve a seal, lacking effective auxiliary sealing and positioning mechanisms. During long-term operation of sand filters, factors such as fluid pressure fluctuations, temperature changes, and equipment vibration can easily lead to seal failure due to the simplistic sealing structure. Once the seal is inadequate, the filter media inside the sand filter may leak, affecting not only the normal operation of the equipment but also potentially polluting the surrounding environment. Simultaneously, external impurities may enter the equipment, interfering with the filtration process, reducing filtration efficiency, shortening the lifespan of the filter media, increasing equipment maintenance costs and operational risks, and in severe cases, even causing the entire sand filter system to malfunction and shut down, resulting in significant economic losses for production and operation. Utility Model Content

[0005] The purpose of this invention is to provide a quick-opening device for the hand hole cover of a continuous automatic sand filter, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A quick-opening device for the hand hole cover of a continuous automatic sand filter includes a sand filter housing and a quick-opening assembly. A top cover is fixedly connected to the top of the sand filter housing, and the quick-opening assembly is provided on the upper surface of the top cover.

[0008] The quick-opening assembly includes a receiving cylinder, which is fixedly connected to the upper surface of the top cover. A handhole cover is inserted into the inner wall of the receiving cylinder, and the handhole cover is used to seal the receiving cylinder.

[0009] The outer wall of the receiving cylinder is provided with a locking assembly for rotating the handhole cover. The rotating locking assembly includes a rotating quick-opening collar, the inner wall of which is fixedly connected to a limiting sealing post. The outer wall of the receiving cylinder has an oblique sealing groove, the inner wall of which is movably connected to the outer wall of the limiting sealing post. The outer wall of the handhole cover has a mating slot, one end of which, passing through the oblique sealing groove, is inserted into the inner wall of the mating slot. A sealing rubber ring is fixedly connected to the outer wall of the handhole cover near the bottom. A limiting groove is fixedly connected to the bottom end of the oblique sealing groove. An adaptive oblique groove is formed at the top of the inner wall of the mating slot.

[0010] A further improvement of this utility model is that the rotating quick-opening collar is movably sleeved on the outer wall of the receiving cylinder.

[0011] Using the above technical solution, when the handhole cover needs to be opened, simply grasp the rotating quick-opening collar and rotate it counterclockwise to lift it up. This design cleverly utilizes the combination of rotation and linear motion. Guided by specific inclined sealing grooves and limiting groove structures, the limiting and closing post on the inner wall of the rotating quick-opening collar can move orderly from the initial locked position to the unlocked position, and during this process, the cooperation between various components is tight and smooth. Compared with traditional handhole cover opening methods, there is no need to use a large number of tools for tedious disassembly and unlocking operations, greatly reducing the labor intensity of operators. For example, opening the handhole cover of some traditional sand filters may require the use of wrenches and other tools to loosen multiple bolts one by one, which is not only time-consuming but also requires a high level of skill from the operator. However, the quick-opening device of this invention allows even non-technical personnel to quickly master the opening method and complete the opening action of the handhole cover in a short time. For continuous automatic sand filters that require frequent equipment maintenance and inspection, this can significantly improve overall work efficiency, reduce equipment downtime, and thus ensure the continuity of production or processing.

[0012] A further improvement of this utility model is that: a positioning groove is provided at the bottom of the hand hole cover, and a positioning post that mates with the positioning groove is fixedly connected to the inner wall of the receiving cylinder.

[0013] A further improvement of this utility model is that the outer wall of the positioning column is movably connected to the inner wall of the positioning groove.

[0014] A further improvement of this utility model is that: an internal reinforcing ring is fixedly connected to the outer wall of one end of the limiting and closing column near the rotating quick-opening collar, and the inner wall of the internal reinforcing ring is movably connected to the inner wall of the receiving cylinder.

[0015] A further improvement of this utility model is that: a water inlet pipe is fixedly connected to the center of the upper surface of the top cover, and a drain pipe is fixedly connected to the bottom end of the filter housing.

[0016] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0017] This utility model provides a quick-opening device for the handhole cover of a continuous automatic sand filter. By rotating the quick-opening collar, the handhole cover can be easily unlocked and opened. The operation is simple and does not require complicated tools, which greatly saves the time and manpower required to open the handhole cover, improves the work efficiency of equipment maintenance, and facilitates the inspection, repair and cleaning of the inside of the continuous automatic sand filter.

[0018] This utility model provides a quick-opening device for the handhole cover of a continuous automatic sand filter. During the closing process, rotating the quick-opening collar drives the limiting sealing column to rotate and press down, causing the handhole cover to move slightly downward and compress the sealing rubber ring. At the same time, the positioning column cooperates with the positioning groove, and the bottom of the handhole cover seals the inclined sealing groove and limiting groove on the outer shell. The synergistic effect of multiple aspects ensures good sealing performance when the handhole cover is closed, effectively preventing internal liquid leakage or external impurities from entering the sand filter, thus ensuring the normal operation of the sand filter and the stability of the treated water quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the quick-opening component structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the receiving cylinder structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the rotating quick-opening collar structure of this utility model.

[0023] In the diagram: 1. Sand filter housing; 2. Quick-opening assembly; 3. Handhole cover; 4. Sealing rubber ring; 5. Connecting slot; 6. Receiving cylinder; 7. Rotary quick-opening collar; 8. Angled closing groove; 9. Limiting groove; 10. Internal reinforcing ring; 11. Limiting closing post; 12. Top cover; 13. Water inlet pipe; 14. Drain pipe; 15. Positioning groove; 16. Positioning post. Detailed Implementation

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 based on the specific circumstances.

[0025] The present invention will be further described in detail below with reference to embodiments:

[0026] like Figure 1-4 As shown, this utility model provides a quick-opening device for the hand hole cover of a continuous automatic sand filter, including a sand filter housing 1 and a quick-opening assembly 2. A top cover 12 is fixedly connected to the top of the sand filter housing 1, and the quick-opening assembly 2 is provided on the upper surface of the top cover 12.

[0027] The quick-opening assembly 2 includes a receiving cylinder 6, which is fixedly connected to the upper surface of the top cover 12. A handhole cover 3 is inserted into the inner wall of the receiving cylinder 6, and the handhole cover 3 is used to seal the receiving cylinder 6.

[0028] The outer wall of the receiving cylinder 6 is provided with a locking assembly for rotating the handhole cover 3. The rotating locking assembly includes a rotating quick-opening collar 7, the inner wall of which is fixedly connected to a limiting sealing post 11. The outer wall of the receiving cylinder 6 is provided with an oblique sealing groove 8, the inner wall of which is movably connected to the outer wall of the limiting sealing post 11. The outer wall of the handhole cover 3 is provided with a docking slot 5, one end of which of the limiting sealing post 11 passes through the oblique sealing groove 8 and is inserted into the inner wall of the docking slot 5. A sealing rubber ring 4 is fixedly connected to the outer wall of the handhole cover 3 near the bottom. A limiting groove 9 is fixedly connected to the bottom end of the oblique sealing groove 8. An adaptive oblique groove is provided at the top of the inner wall of the docking slot 5.

[0029] like Figure 1-4 As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, the rotating quick-opening collar 7 is movably sleeved on the outer wall of the receiving cylinder 6.

[0030] The bottom of the handhole cover 3 is provided with a positioning groove 15, and the inner wall of the receiving cylinder 6 is fixedly connected with a positioning post 16 that mates with the positioning groove 15.

[0031] The outer wall of the positioning post 16 is movably inserted into the inner wall of the positioning groove 15.

[0032] The outer wall of the limiting and closing column 11 near the rotating quick-opening collar 7 is fixedly connected to an internal reinforcing ring 10, and the inner wall of the internal reinforcing ring 10 is movably connected to the inner wall of the receiving cylinder 6.

[0033] A water inlet pipe 13 is fixedly connected to the center of the upper surface of the top cover 12, and a drain pipe 14 is fixedly connected to the bottom of the filter housing 1.

[0034] The working principle of the quick-opening device for the hand hole cover of this continuous automatic sand filter will be explained in detail below.

[0035] like Figure 1-4 As shown, when it is necessary to open the handhole cover 3, the operator holds the rotating quick-opening collar 7, then rotates it counterclockwise and lifts it. At this time, the limiting sealing post 11 on the inner wall of the rotating quick-opening collar 7 will slide on the inner wall of the limiting groove 9 towards the oblique sealing groove 8, and move upward during the sliding process. When the limiting sealing post 11 slides on the inner wall of the oblique sealing groove 8, it will also slide from the matching oblique groove. When it slides to the top of the inner wall of the oblique sealing groove 8, one end of the limiting sealing post 11 will also just overlap the top of the inner wall of the docking slot 5. Then, the handhole cover 3 can be lifted up to remove it from the receiving cylinder 6 and thus open it.

[0036] When closing the handhole cover 3, insert it into the receiving cylinder 6 and align the docking slot 5 with the limiting sealing post 11. When the handhole cover 3 moves down to the top of the inner wall of the docking slot 5 and overlaps with the outer wall of the limiting sealing post 11, the positioning groove 15 engages with the positioning post 16. Then, rotate the quick-opening collar 7 clockwise, causing it to move the limiting sealing post 11 from the inner wall of the inclined sealing groove 8 towards the limiting groove 9, until the bottom surface of the limiting sealing post 11 overlaps with the bottom surface of the inner wall of the limiting groove 9, thus completing the locking of the handhole cover 3. During the rotation of the limiting sealing post 11, since it rotates downwards, it will compress the inner wall of the matching inclined groove of the docking slot 5, causing the handhole cover 3 to move slightly downwards and compressing the sealing rubber ring 4 to improve the sealing performance.

[0037] Meanwhile, the oblique sealing groove 8 and the limiting groove 9 will be sealed by the bottom outer wall of the handhole cover 3.

[0038] A positioning post 16 for sealing the docking slot 5 is fixedly connected in the receiving tube 6 at a position corresponding to the bottom end of the docking slot 5. After the hand hole cover 3 is closed, the positioning post 16 can effectively maintain the sealing effect on the docking slot 5.

[0039] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A quick-opening device for the handhole cover of a continuous automatic sand filter, comprising a sand filter housing (1) and a quick-opening assembly (2), characterized in that: The top of the filter housing (1) is fixedly connected to a top cover (12), and a quick-opening assembly (2) is provided on the upper surface of the top cover (12). The quick-opening assembly (2) includes a receiving cylinder (6), which is fixedly connected to the upper surface of the top cover (12). A handhole cover (3) is inserted into the inner wall of the receiving cylinder (6), and the handhole cover (3) is used to seal the receiving cylinder (6). The outer wall of the receiving cylinder (6) is provided with a locking assembly for rotating the handhole cover (3). The rotating locking assembly includes a rotating quick-opening collar (7). The inner wall of the rotating quick-opening collar (7) is fixedly connected to a limiting closing post (11). The outer wall of the receiving cylinder (6) is provided with an oblique closing groove (8). The inner wall of the oblique closing groove (8) is movably connected to the outer wall of the limiting closing post (11). The outer wall of the handhole cover (3) is provided with a docking slot (5). One end of the limiting closing post (11) passes through the oblique closing groove (8) and is inserted into the inner wall of the docking slot (5). The outer wall of the handhole cover (3) near the bottom is fixedly connected with a sealing rubber ring (4). The bottom end of the oblique closing groove (8) is fixedly connected with a limiting groove (9). The top of the inner wall of the docking slot (5) is provided with an adapting oblique groove.

2. The quick-opening device for the handhole cover of a continuous automatic sand filter according to claim 1, characterized in that: The rotating quick-opening collar (7) is movably sleeved on the outer wall of the receiving cylinder (6).

3. The quick-opening device for the handhole cover of a continuous automatic sand filter according to claim 1, characterized in that: The bottom end of the handhole cover (3) is provided with a positioning groove (15), and the inner wall of the receiving cylinder (6) is fixedly connected with a positioning post (16) that mates with the positioning groove (15).

4. The quick-opening device for the handhole cover of a continuous automatic sand filter according to claim 3, characterized in that: The outer wall of the positioning post (16) is movably inserted into the inner wall of the positioning groove (15).

5. The quick-opening device for the handhole cover of a continuous automatic sand filter according to claim 1, characterized in that: The outer wall of the limiting and closing column (11) near the rotating quick-opening collar (7) is fixedly connected to an internal reinforcing ring (10), and the inner wall of the internal reinforcing ring (10) is movably connected to the inner wall of the receiving cylinder (6).

6. The quick-opening device for the handhole cover of a continuous automatic sand filter according to claim 1, characterized in that: A water inlet pipe (13) is fixedly connected to the center of the upper surface of the top cover (12), and a drain pipe (14) is fixedly connected to the bottom end of the filter housing (1).

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