Manhole structure applied to liquid storage tank

Abstract

According to the manhole structure applied to the liquid storage tank, the sliding groove is formed in the supporting part, the sliding connecting part matched with the sliding groove is arranged on the manhole cover, and the sliding connecting part can horizontally move in the direction of the sliding groove after stretching into the sliding groove, so that the whole body part is driven to be opened and closed, and rotation or complex mechanical operation is not needed by the structure; therefore, the manhole can be conveniently opened and closed, and the working efficiency is improved. Besides, in order to guarantee the sealing performance of the manhole in the closed state, a cover body sealing groove is formed in the cover body connecting part, when the body part of the manhole cover is completely embedded into the sealing groove, external gas, liquid or solid particles can be effectively prevented from entering the manhole cover, and the stability of the internal environment of the container is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid storage tanks, in particular to a manhole structure applied to liquid storage tanks. Background Art

[0002] In the prior art, manhole covers on liquid storage tanks are typically opened by fastening them to the mounting end of the cover body with bolts or other fasteners. However, this opening method is cumbersome and slow to open. Furthermore, because bolts and other fasteners are prone to rust or damage, the manhole cover cannot be tightly closed, thus affecting the sealing and safety of the liquid storage tank. Therefore, a new manhole structure is needed to simplify the opening method of the manhole cover, increase the opening speed, and ensure the sealing and safety of the liquid storage tank. Summary of the Invention

[0003] In view of this, the utility model provides a manhole structure applied to a liquid storage tank.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A manhole structure applied to a liquid storage tank includes a head and a manhole cover, wherein a protrusion is formed on the head to form a cover mounting end, a manhole is provided on the cover mounting end, the cover mounting end has a support portion and a cover connecting portion, a slide groove and a cover sealing groove are respectively provided on the support portion and the cover connecting portion, the manhole cover has a sliding connection portion and a main body portion corresponding to the slide groove and the cover sealing groove, the sliding connection portion extends into the slide groove and is movably connected to the cover connecting end, and the sliding connection portion drives the main body portion to move in the cover sealing groove during the process of sliding in the slide groove, and the opening and closing of the manhole is controlled during the movement of the main body portion.

[0006] Preferably, the sliding connection portion is arranged in an L-shaped structure, and the sliding connection portion has a connecting end and a sliding end, the connecting end is connected to the main body, and the sliding end extends into the sliding groove and is connected to the cover body mounting end.

[0007] Preferably, the support portion is arranged in a cylindrical shape, the manhole is arranged at the center of the support portion and the cover body connection portion, a sliding bar is protruded on the outer wall of the support portion, the slide groove is opened on the sliding bar, and an isolation portion is protruded on the inner wall of the slide groove. The isolation portion separates the slide groove into a ball mounting portion and a sliding portion, and a through groove connecting the ball mounting portion and the sliding portion is opened on the isolation portion. A number of steel balls are arranged in the ball mounting portion, and the sliding connection portion of the manhole cover extends into the sliding portion and is slidably connected to the cover body mounting end.

[0008] Preferably, one side of the steel ball extends into the sliding portion through the through groove and connects with the sliding connection portion of the manhole cover.

[0009] Preferably, the cover body connecting portion is arranged in a U-shaped structure, the cover body sealing groove is arranged on the inner side of the cover body connecting portion, a sealing gasket is arranged in the cover body sealing groove, and the sealing gasket is respectively sealed with the groove wall of the cover body sealing groove and the main body of the manhole cover.

[0010] Preferably, one end of the support portion protrudes to form a limiting connection end, a connecting rod is provided on the limiting connection end, a limiting hole is provided on the manhole cover, and one end of the connecting rod passes through the limiting hole and is connected to the limiting end.

[0011] Preferably, a limiting nut is provided on one end of the connecting rod passing through the limiting hole, the outer diameter of the limiting nut is larger than the outer diameter of the limiting hole, and the limiting nut limits the position of the manhole cover on the connecting rod.

[0012] Preferably, a screw hole is provided on the position-limiting connection end, and the connecting rod extends into the screw hole and is threadedly connected to the position-limiting connection end.

[0013] The beneficial effects of the present invention are as follows: by providing a sliding groove on the support portion and providing a sliding connection portion on the manhole cover that is compatible with the sliding groove, the sliding connection portion can be inserted into the sliding groove and can move horizontally along the direction of the sliding groove, thereby driving the entire main body to open and close. This structure can achieve convenient opening and closing of the manhole without the need for rotation or complex mechanical operations, thereby improving work efficiency. In addition, to ensure the sealing of the manhole in the closed state, a cover sealing groove is provided on the cover body connection portion. When the main body of the manhole cover is fully embedded in the sealing groove, it can effectively prevent the entry of external gases, liquids or solid particles, thereby ensuring the stability of the internal environment of the container. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Attachment Figure 1 It is a schematic diagram of the connection structure between the head and the manhole cover;

[0016] Attachment Figure 2 For attachment Figure 1 Enlarged view of point A in the middle;

[0017] Attachment Figure 3 This is a schematic diagram of the manhole cover when viewed from above;

[0018] Attachment Figure 4 For attachment Figure 3 Cross-sectional view at the middle BB. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] The utility model provides the following technical solutions:

[0022] As attached Figure 1-4 As shown, the utility model discloses a manhole structure that is easy to open and close, including a head 1 and a manhole cover 3, a cover mounting end 4 is protruded on the head 1, a manhole 2 is provided on the cover mounting end 4, the cover mounting end 4 has a support portion 5 and a cover connecting portion 6, a slide groove 7 and a cover sealing groove 8 are respectively provided on the support portion 5 and the cover connecting portion 6, the manhole cover 3 has a sliding connection portion 9 and a main body portion 10 corresponding to the slide groove 7 and the cover sealing groove 8, the sliding connection portion 9 extends into the slide groove 7 and is movably connected to the cover connecting end, and the sliding connection portion 9 drives the main body portion 10 to move in the cover sealing groove 8 during the sliding process in the slide groove 7, and the opening and closing of the manhole 2 is controlled during the movement of the main body portion 10. Specifically, in this design, by providing a chute 7 on the support portion 5 and providing a sliding connection portion 9 on the manhole cover 3 that is compatible with the chute 7, the sliding connection portion 9 can be inserted into the chute 7 and horizontally moved along the direction of the chute 7, thereby driving the entire main body 10 to open and close. This structure does not require rotation or complex mechanical operations, and can achieve convenient opening and closing of the manhole 2, thereby improving work efficiency. In addition, in order to ensure the sealing of the manhole 2 in the closed state, a cover sealing groove 8 is provided on the cover connection portion 6. When the main body 10 of the manhole cover 3 is fully embedded in the sealing groove, it can effectively prevent the entry of external gases, liquids or solid particles, thereby ensuring the stability of the internal environment of the container.

[0023] Specifically, the sliding connection portion 9 is welded to the main body 10 and is arranged in an L-shaped structure. The sliding connection portion 9 has a connecting end 24 and a sliding end 25. The connecting end 24 is connected to the main body 10, and the sliding end 28 extends into the chute 7 and connects to the cover mounting end 4. In this embodiment, the stable connection between the connecting end 24 and the main body 10 ensures the integrity and safety of the manhole cover 3 during the opening and closing process, while the precise fit between the sliding end 25 and the chute 7 makes the sliding operation smoother and more accurate, effectively avoiding the possibility of jamming or misalignment during the opening and closing process.

[0024] Furthermore, the support portion 5 is provided in a cylindrical shape, and the manhole 2 is provided through the center of the support portion 5 and the cover body connection portion 6. A sliding bar 11 is welded on the outer wall of the support portion 5, and the slide groove 7 is provided on the sliding bar 11. An isolation portion 12 is protruded on the inner wall of the slide groove 7. The isolation portion 12 separates the slide groove 7 into a ball mounting portion 13 and a sliding portion 14. A through groove 15 is provided on the isolation portion 12 to connect the ball mounting portion 13 and the sliding portion 14. A plurality of steel balls 16 are provided in the ball mounting portion 13. The sliding connection portion 9 of the manhole cover 3 extends into the sliding portion 14 and is slidably connected to the cover body mounting end 4. One side of the steel ball 16 extends into the sliding portion 14 through the through groove 15 and is connected to the sliding connection portion 9 of the manhole cover 3. Specifically, in this embodiment, the cylindrical design of the support portion 5 not only enhances the stability of the structure, but also provides a smoother sliding trajectory for the manhole cover 3. In this embodiment, the sliding bars 11 are symmetrically arranged on both sides of the support portion 5 so that the sliding connection portion 9 can move smoothly within the chute 7 on both sides, improving the stability of the sliding. The provision of the isolation portion 12 divides the chute 7 into a ball mounting portion 13 and a sliding portion 14. This design not only ensures the stable installation of the steel balls 16, but also greatly reduces the friction of the manhole cover 3 during the sliding process through the rolling action of the steel balls 16, thereby further improving the convenience and efficiency of opening and closing the manhole 2. The steel balls 16 in the ball mounting portion 13 are connected to the sliding portion 14 through the through groove 15. When the sliding connection portion 9 slides within the sliding portion 14, the steel balls 16 roll with it, providing lubrication and support. This design not only extends the service life of the manhole cover 3, but also ensures the smoothness and reliability of the opening and closing process. Furthermore, a plug can be provided at one end of the ball mounting portion 13 to block the ball mounting portion 13 and prevent the steel balls 16 from falling out.

[0025] Furthermore, the cover body connecting portion 6 is arranged in a U-shaped structure, the cover body sealing groove 8 is arranged on the inner side of the cover body connecting portion 6, and a sealing gasket 17 is arranged in the cover body sealing groove 8, and the sealing gasket 17 is sealed with the groove wall of the cover body sealing groove 8 and the main body 10 of the manhole cover 3 respectively. Specifically, in this embodiment, the U-shaped structural design of the cover body connecting portion 6 provides a stable installation space for the sealing gasket 17, ensuring the stability of the sealing gasket 17. The provision of the sealing gasket 17 effectively enhances the sealing performance of the manhole 2 in the closed state, further prevents the entry of external gas, liquid or solid particles, and ensures the stability of the internal environment of the container. In addition, the sealing gasket 17 is sealed with the main body 10 of the manhole cover 3 and the groove wall of the cover body sealing groove 8, which not only ensures the tightness of the seal, but also improves the durability of the sealing gasket 17 and extends its service life. The material of the sealing gasket 17 can be rubber or graphite gasket.

[0026] Furthermore, one end of the support portion 5 protrudes to form a limiting connection end 18, a connecting rod 19 is provided on the limiting connection end 18, a limiting hole 21 is provided on the manhole cover 3, and one end of the connecting rod 19 passes through the limiting hole 21 and is connected to the limiting end 20. Specifically, in this embodiment, the connection rod 19 is provided to guide the opening and closing of the manhole cover 3, and a limit nut 22 is provided on one end of the connection rod 19 passing through the limit hole 21. The outer diameter of the limit nut 22 is larger than the outer diameter of the limit hole 21. The limit nut 22 limits the position of the manhole cover 3 on the connection rod 19 and prevents the manhole cover 3 from falling off after the manhole 2 is fully opened. In addition, the connection rod 19 is provided with a screw structure, and the limit nut 22 can be screwed in and out along the connection rod 19. Therefore, when the manhole cover 3 seals the manhole 2, by tightening the limit nut 22 toward the limit end 20, the manhole cover 3 is tightly pressed against the cover body sealing groove 8, further enhancing the sealing performance of the manhole 2 in the closed state. This design not only improves the safety of the manhole 2 structure, but also facilitates user operation and maintenance.

[0027] Furthermore, the position-limiting connection end 18 has a screw hole, into which the connecting rod 19 extends for threaded connection with the position-limiting connection end 18. Specifically, in this embodiment, the threaded connection between the connecting rod 19 and the position-limiting connection end 18 simplifies installation and removal of the connecting rod 19 while ensuring a secure and stable connection. This design not only facilitates replacement or repair of the manhole cover 3 when necessary, but also improves the maintainability and reusability of the entire structure.

[0028] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A manhole structure for a liquid storage tank, comprising a head and a manhole cover, wherein the head protrudes to form a cover mounting end, and the cover mounting end is provided with a manhole, characterized in that: The cover mounting end has a supporting portion and a cover connecting portion, and a sliding groove and a cover sealing groove are respectively provided on the supporting portion and the cover connecting portion. The manhole cover has a sliding connecting portion and a main body portion corresponding to the sliding groove and the cover sealing groove. The sliding connecting portion extends into the sliding groove and is movably connected to the cover connecting end. The sliding connecting portion drives the main body portion to move in the cover sealing groove during the sliding process in the sliding groove, and the opening and closing of the manhole is controlled during the movement of the main body portion.

2. The manhole structure for a liquid storage tank according to claim 1, characterized in that: The sliding connection portion is arranged in an L-shaped structure and has a connecting end and a sliding end. The connecting end is connected to the main body portion, and the sliding end extends into the sliding groove and is connected to the cover body mounting end.

3. The manhole structure for a liquid storage tank according to claim 1, characterized in that: The support part is arranged in a cylindrical shape, and the manhole is arranged at the center of the support part and the cover body connection part. The outer wall of the support part protrudes to form a sliding bar, and the slide groove is opened on the sliding bar. The inner wall of the slide groove protrudes to form an isolation part. The isolation part separates the slide groove into a ball mounting part and a sliding part. A through groove connecting the ball mounting part and the sliding part is opened on the isolation part. A number of steel balls are arranged in the ball mounting part. The sliding connection part of the manhole cover extends into the sliding part and is slidably connected to the cover body mounting end.

4. The manhole structure for a liquid storage tank according to claim 3, characterized in that: One side of the steel ball extends into the sliding portion through the through groove and is connected to the sliding connection portion of the manhole cover.

5. The manhole structure for a liquid storage tank according to claim 1, characterized in that: The cover body connecting portion is arranged in a U-shaped structure, the cover body sealing groove is arranged on the inner side of the cover body connecting portion, and a sealing gasket is arranged in the cover body sealing groove. The sealing gasket is respectively sealed with the groove wall of the cover body sealing groove and the main body of the manhole cover.

6. The manhole structure for a liquid storage tank according to claim 1, characterized in that: One end of the support portion protrudes to form a limiting connection end, a connecting rod is provided on the limiting connection end, a limiting hole is provided on the manhole cover, and one end of the connecting rod passes through the limiting hole and is connected to the limiting end.

7. The manhole structure for a liquid storage tank according to claim 6, characterized in that: A limiting nut is provided on one end of the connecting rod passing through the limiting hole. The outer diameter of the limiting nut is larger than the outer diameter of the limiting hole. The limiting nut limits the position of the manhole cover on the connecting rod.

8. The manhole structure for a liquid storage tank according to claim 6, characterized in that: A screw hole is provided on the position-limiting connection end, and the connecting rod extends into the screw hole and is threadedly connected to the position-limiting connection end.

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