Novel manhole cover applied to stirring tank

Abstract

The utility model provides a new manhole cover applied to the stirring tank, through setting up the cover mounting seat between the seat body mounting part and the cover body of tank body, realize the detachable and the turnover design of manhole cover assembly. The setting of cover mounting seat not only provides stable support for the turnover of manhole cover, but also effectively guarantees the sealing performance of tank body through the double sealing structure of first sealing positioning unit and second sealing positioning unit. Among them, the design of first step structure and second step structure makes the sealing piece can be tightly pressed in between, thereby preventing the medium leakage inside and outside the tank. At the same time, the use of fastener further enhances the connection strength between cover mounting seat and seat body mounting part, ensures the stability and safety of manhole cover assembly. In addition, the design of this new manhole cover is also convenient for maintenance and overhaul, when needing to enter the inside of tank, only needs to loosen the fastener, overturns the cover, can greatly improve the work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mixing tank technology, and specifically to a novel manhole cover for use in mixing tanks. Background Technology

[0002] In the prior art, the manhole cover on the mixing tank is usually directly installed on the tank body. This type of manhole cover is cumbersome to disassemble and install. After long-term use, the part of the tank body used to install the manhole cover will wear down, resulting in a decrease in sealing performance and affecting the normal use of the mixing tank. Summary of the Invention

[0003] In view of this, the present invention provides a novel manhole cover for use in mixing tanks.

[0004] To achieve the above objectives, this utility model provides the following technical solution: Preferably, a rotating connection portion protrudes from one side of the cover, a rotating groove is formed on the rotating connection portion, a rotating end protrudes from the cover mounting base, the rotating end extends into the rotating groove and connects with the cover, a rotating shaft is provided through the rotating end and the two side walls of the rotating groove, and a torsion spring is provided on the rotating shaft.

[0005] The beneficial effects of this utility model are as follows: By setting a cover mounting seat between the tank body and the cover body, a detachable and flip-up design for the manhole cover assembly is achieved. The cover mounting seat not only provides stable support for the flipping of the manhole cover, but also effectively ensures the sealing performance of the tank through the dual sealing structure of the first and second sealing positioning units. The design of the first and second stepped structures allows the seal to be tightly pressed between them, thereby preventing leakage of media inside and outside the tank. At the same time, the use of fasteners further enhances the connection strength between the cover mounting seat and the base mounting part, ensuring the stability and safety of the manhole cover assembly. Furthermore, this novel manhole cover design facilitates maintenance and repair; when it is necessary to enter the tank, simply loosen the fasteners and flip the cover, greatly improving work efficiency. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0007] Appendix Figure 1 This is a schematic diagram of the structure of this utility model; Appendix Figure 2 For the appendix Figure 1 Enlarged view of point A in the middle. Detailed Implementation

[0008] 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.

[0009] The present invention will now be further described with reference to the accompanying drawings.

[0010] This utility model provides the following technical solution: As attached Figure 1-2As shown, this utility model discloses a novel manhole cover for a mixing tank, comprising a manhole cover assembly 2 disposed on a tank body 1. The manhole cover assembly 2 includes a cover body 3 and a cover body mounting base 4. The cover body 3 is rotatably disposed on the cover body mounting base 4, and the cover body mounting base 4 is detachably disposed on the tank body 1. A first sealing and positioning unit 5 is disposed between the cover body mounting base 4 and the tank body 1, and a second sealing and positioning unit 6 is disposed between the cover body mounting base 4 and the cover body 3. The first sealing and positioning unit 5 includes a seat mounting portion 7 protruding from the tank body 1 and a first stepped structure formed on the inner wall of the cover body mounting base 4. 8. The seat mounting part 7 is arranged in a ring structure. A through hole 9 communicating with the interior of the tank 1 is provided on the seat mounting part 7. A second step structure 10 corresponding to the first step structure 8 is provided on the outer wall of the seat mounting part 7. The first step structure 8 overlaps the second step structure 10. A sealing element 11 and a fastener 12 are provided between the first step structure 8 and the second step structure 10. The first step structure 8 and the second step structure 10 press the sealing element 11 together. The fastener 12 passes through the first step structure 8 and the second step structure 10 to connect the cover mounting seat 4 to the seat mounting part 7. Specifically, in this design, by providing a cover mounting seat 4 between the seat mounting part 7 of the tank 1 and the cover 3, the detachable and flip-up design of the manhole cover assembly 2 is achieved. The cover mounting seat 4 not only provides stable support for the flipping of the manhole cover, but also effectively ensures the sealing performance of the tank 1 through the double sealing structure of the first sealing positioning unit 5 and the second sealing positioning unit 6. The design of the first stepped structure 8 and the second stepped structure 10 allows the seal 11 to be tightly pressed between them, thus preventing leakage of the medium inside and outside the tank 1. Meanwhile, the use of fasteners 12 further enhances the connection strength between the cover mounting base 4 and the base mounting part 7, ensuring the stability and safety of the manhole cover assembly 2. Furthermore, this new manhole cover design facilitates maintenance and repair; when it is necessary to enter the tank 1, simply loosen the fasteners 12 and flip the cover 3, greatly improving work efficiency.

[0011] Furthermore, the cross-sectional shape of the seat mounting part 7 is convex. The second stepped structure 10 has two stepped surfaces 13 and a connecting surface 14 disposed between the stepped surfaces 13. The connecting surface 14 is provided with external threads. The first stepped structure 8 has two seat stepped surfaces 15 corresponding to the stepped surfaces 13 and a seat connecting surface 16 disposed between the seat stepped surfaces 15. The seat connecting surface 16 is provided with internal threads. The seat connecting surface 16 and the connecting surface 14 are threadedly connected. The sealing element 11 is disposed between the stepped surface 13 and the corresponding seat stepped surface 15. Specifically, in this embodiment, the design of the two stepped surfaces 13 and the connecting surface 14 of the second stepped structure 10 allows for a tighter fit with the first stepped structure 8. Through the threaded connection, a firm connection can be achieved between the seat connecting surface 16 and the connecting surface 14, while facilitating disassembly and reinstallation. This design not only improves the sealing performance of the manhole cover but also makes the manhole cover less prone to loosening or damage during long-term use. In addition, the seal 11 is disposed between the stepped surface 13 and the corresponding seat stepped surface 15, which can effectively prevent media leakage and ensure the normal operation of the tank 1.

[0012] Furthermore, the cover mounting base 4 has a through hole 17. The second sealing positioning unit 6 includes an annular sealing groove 18 on the inner wall of the through hole 17 near the cover 3 and an annular sealing ring 19 disposed within the annular sealing groove 18. The annular sealing ring 19 has an elliptical cross-sectional shape and is bonded and fixed to the inner wall of the annular sealing groove 18. An annular sealing end 20 protrudes from the end face of the cover 3 near the cover mounting base 4. The annular sealing end 20 has a trapezoidal cross-sectional shape and presses the annular sealing ring 19 into the annular sealing groove 18. Specifically, in this embodiment, the design of the second sealing positioning unit 6 further enhances the sealing performance of the manhole cover. The annular sealing groove 18 and the annular sealing ring 19 allow for a tighter sealing structure between the cover 3 and the cover mounting base 4. The elliptical annular sealing ring 19 design not only accommodates minor deformations of the cover 3 during installation but also ensures the durability of the sealing effect. Meanwhile, the pressing action between the annular sealing end 20 and the annular sealing ring 19 further improves the reliability of the seal. This design not only effectively prevents leakage of the medium inside and outside the tank 1, but also ensures that the manhole cover maintains good sealing performance during long-term use. In addition, the adhesive fixing method between the annular sealing ring 19 and the annular sealing groove 18 not only ensures the stability of the sealing element 11, but also facilitates replacement and maintenance, thereby extending the service life of the manhole cover.

[0013] Furthermore, the annular sealing end 20, with a trapezoidal cross-sectional shape, has an inclined annular surface 21. This inclined annular surface 21 is located on the outer ring side of the annular sealing end 20, and its inclination direction is such that the end of the outer ring side of the inclined sealing end closest to the cover 3 is inclined towards the center of the through hole 17 in the seat. Specifically, in this embodiment, the design of the inclined annular surface 21 allows the annular sealing end 20 to better cooperate with the annular sealing ring 19 during installation, forming a tighter sealing structure. When the cover 3 is pressed onto the cover mounting base 4, the inclined annular surface 21 gradually slides and presses along the inner wall of the annular sealing ring 19, thereby ensuring the uniformity and reliability of the sealing effect. This design not only improves the sealing performance of the manhole cover but also reduces sealing failure problems caused by improper installation or long-term use.

[0014] Furthermore, the edge of the cover 3 protrudes to form a sheet-like annular positioning portion 22. The cover mounting base 4 is provided with an annular connecting portion 23 corresponding to the annular positioning portion 22. Bolts are provided between the annular positioning portion 22 and the annular connecting portion 23, and the annular positioning portion 22 and the annular connecting portion 23 are fixed together by bolts. Specifically, in this embodiment, the design of the annular positioning portion 22 and the annular connecting portion 23 provides additional stability to the manhole cover. Tightly connecting the annular positioning portion 22 and the annular connecting portion 23 with bolts not only enhances the connection strength between the cover 3 and the cover mounting base 4 but also effectively prevents loosening caused by vibration or external impact. This design allows the manhole cover to maintain stable sealing performance during long-term use, while also facilitating disassembly and reinstallation, providing convenience for the maintenance and repair of the tank 1. In addition, the sheet-like annular positioning portion 22 design allows the cover 3 to be positioned more accurately during installation, thereby improving installation efficiency and accuracy.

[0015] Furthermore, a rotating connecting part 24 protrudes from one side of the cover 3, and a rotating groove 25 is formed on the rotating connecting part 24. A rotating end 26 protrudes from the cover mounting base 4, and the rotating end 26 extends into the rotating groove 25 and connects to the cover 3. A rotating shaft 27 is provided through the rotating end 26 and the two side walls of the rotating groove 25. Specifically, in this embodiment, the design of the rotating connecting part 24 and the rotating end 26 realizes the flipping function of the cover 3. By connecting the rotating end 26 to the rotating groove 25 through the rotating shaft 27, not only can the cover 3 be flexibly flipped on the cover mounting base 4, but the stability and smoothness of the flipping process are also ensured.

[0016] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those 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 to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A novel manhole cover for a mixing tank, comprising a manhole cover assembly disposed on the tank body, the manhole cover assembly comprising a cover body and a cover body mounting base, the cover body being rotatably disposed on the cover body mounting base, characterized in that: The cover mounting base is detachably mounted on the tank body. A first sealing and positioning unit is provided between the cover mounting base and the tank body, and a second sealing and positioning unit is provided between the cover mounting base and the cover body. The first sealing and positioning unit includes a seat mounting portion protruding from the tank body and a first stepped structure formed on the inner wall of the mounting base. The seat mounting portion is arranged in a ring structure. A mounting portion through hole communicating with the interior of the tank body is opened on the seat mounting portion. A second stepped structure corresponding to the first stepped structure is provided on the outer wall of the seat mounting portion. The first stepped structure overlaps the second stepped structure. A sealing element and a fastener are provided between the first stepped structure and the second stepped structure. The first stepped structure and the second stepped structure press the sealing element together. The fastener passes through the first stepped structure and the second stepped structure to connect the cover mounting base and the seat mounting portion.

2. The novel manhole cover for use in a mixing tank according to claim 1, characterized in that: The cross-sectional shape of the seat mounting part is convex. The second stepped structure has two stepped surfaces and a connecting surface between the stepped surfaces. The connecting surface is provided with external threads. The first stepped structure has two corresponding stepped surfaces of the seat and a seat connecting surface between the stepped surfaces of the seat. The seat connecting surface is provided with internal threads. The seat connecting surface and the connecting surface are threaded together. The sealing element is provided between the stepped surface and the corresponding seat stepped surface.

3. The novel manhole cover for use in a mixing tank according to claim 1, characterized in that: The cover mounting base has a through hole. The second sealing and positioning unit includes an annular sealing groove on the inner wall of the through hole near the cover and an annular sealing ring disposed in the annular sealing groove. The annular sealing ring has an elliptical cross-sectional shape. The annular sealing ring is bonded and fixed to the inner wall of the annular sealing groove. An annular sealing end protrudes from the end face of the cover near the cover mounting base. The annular sealing end has a trapezoidal cross-sectional shape and presses the annular sealing ring into the annular sealing groove.

4. The novel manhole cover for use in a mixing tank according to claim 3, characterized in that: The annular sealing end, which has a trapezoidal cross-sectional shape, has an inclined annular surface. The inclined annular surface is located on the outer ring side of the annular sealing end, and the inclined direction of the inclined annular surface is such that the end of the outer ring side of the inclined sealing end near the cover body is inclined towards the center of the through hole of the seat body.

5. The novel manhole cover for a mixing tank according to claim 1, characterized in that: The edge of the cover protrudes to form a sheet-like annular positioning part. The cover mounting base is provided with an annular connecting part corresponding to the annular positioning part. A bolt is provided between the annular positioning part and the annular connecting part. The annular positioning part and the annular connecting part are fixed together by bolts.

6. The novel manhole cover for use in a mixing tank according to claim 1, characterized in that: A rotating connection part protrudes from one side of the cover, and a rotating groove is formed on the rotating connection part. A rotating end protrudes from the cover mounting base, and the rotating end extends into the rotating groove and connects with the cover. A rotating shaft is provided through the rotating end and the two side walls of the rotating groove, and a torsion spring is provided on the rotating shaft.

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