Manhole cover opening and closing mechanism of circular heat preservation water tank

Abstract

The utility model discloses a manhole cover opening and closing mechanism of a circular heat preservation water tank, which relates to the technical field of heat preservation water tanks and comprises a water tank top cover and a manhole cover, a manhole matched with the manhole cover is arranged at the center inside the water tank top cover, and a rotating block is rotatably connected inside the manhole cover. When the manhole cover needs to be opened, the rotating block and the manhole cover are separated from each other through a key, at the moment, the hand wheel is rotated, the hand wheel drives the rotating block and the rotating cam to rotate, and under rotation of the rotating cam, the two sets of connecting plates are driven to be separated from limiting of the inner side of the water tank top cover; the manhole cover can be opened relative to the water tank top cover, when the manhole cover needs to be closed, a user only needs to reversely rotate the hand wheel, the two sets of connecting plates are inserted into the inner side of the water tank top cover, and therefore the manhole cover and the water tank top cover are clamped and limited mutually, and the opening and closing portability of the manhole cover is effectively improved; therefore, the overall working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal insulation water tanks, in particular to a circular thermal insulation water tank manhole cover opening and closing mechanism. Background Art

[0002] The insulated water tank is different from the stainless steel fire water tank. The insulated water tank refers to the addition of special industrial and thermal insulation materials in the interlayer of the water tank so that the water tank can maintain a certain temperature to meet life or industrial needs. The insulated water tank can be divided into stainless steel insulated water tank, pressure insulated water tank, and fiberglass insulated water tank according to the different materials used and processed. A manhole is set on the top of the insulated water tank, which is convenient for the staff to inspect and observe the inside of the insulated water tank. The insulated water tank can be divided into square water tank and round water tank according to its shape.

[0003] In the prior art, the manhole is closed by a manhole cover, but the connection stability between the manhole cover and the manhole is poor, and the overall connection is more complicated, which leads to a decrease in the opening and closing speed of the manhole cover, thereby reducing the overall work efficiency. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a circular insulated water tank manhole cover opening and closing mechanism to solve the technical problems in the prior art that the connection stability between the manhole cover and the manhole is poor and the overall connection is more complicated, which leads to a decrease in the opening and closing speed of the manhole cover, thereby reducing the overall work efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a circular insulated water tank manhole cover opening and closing mechanism, comprising a water tank top cover and a manhole cover, a manhole matching the manhole cover is provided at the central position inside the water tank top cover, a rotating block is rotatably connected inside the manhole cover, a rotating cam is fixed at the bottom of the rotating block, connecting plates matching the inside of the water tank top cover are movably connected on both sides of the rotating cam, sliding grooves slidably connected to the connecting plates are provided on both sides of the manhole cover, and connecting grooves matching the connecting plates are provided on both sides of the water tank top cover, universal limit balls extending to the inside of the rotating cam are fixed on the inner sides of the two groups of connecting plates, sliding grooves matching the universal limit balls are provided at the inner edge of the rotating cam, and the cross-sections of the universal limit balls and the sliding grooves are circular.

[0006] By adopting the above technical solution, the manhole cover and the water tank top cover are rotatably connected through a hinge seat. When the manhole cover needs to be opened, first use the key to release the limit between the rotating block and the manhole cover. At this time, rotate the handwheel, so that the handwheel drives the rotating block and the rotating cam to rotate. Under the rotation of the rotating cam, drive the two connecting plates to release the limit on the inner side of the water tank top cover, so that the manhole cover can be opened relative to the water tank top cover. When the manhole cover needs to be closed, just rotate the handwheel in the reverse direction to insert the two connecting plates into the inner side of the water tank top cover, so that the manhole cover and the water tank top cover are engaged and limited to each other. As can be seen from the above, the overall opening and closing of the present invention is relatively convenient, effectively improving the portability of opening and closing the manhole cover, thereby improving the overall work efficiency.

[0007] The present invention is further configured such that a handwheel is fixed to the outside of the rotating block, and a lock body is provided inside the rotating block.

[0008] By adopting the above technical solution, the handwheel facilitates the rotation of the rotating block and the rotating cam.

[0009] The present invention is further configured such that one side between the manhole cover and the water tank top cover is rotatably connected through a hinge seat.

[0010] By adopting the above technical solution, the hinge seat facilitates the rotation between the manhole cover and the water tank top cover.

[0011] In summary, the present invention mainly has the following beneficial effects: The manhole cover and the water tank top cover of the present invention are rotatably connected through a hinge seat. When the manhole cover needs to be opened, first use the key to release the limit between the rotating block and the manhole cover. At this time, rotate the handwheel, so that the handwheel drives the rotating block and the rotating cam to rotate. Under the rotation of the rotating cam, drive the two connecting plates to release the limit on the inner side of the water tank top cover, so that the manhole cover can be opened relative to the water tank top cover. When the manhole cover needs to be closed, just rotate the handwheel in the reverse direction to insert the two connecting plates into the inner side of the water tank top cover, so that the manhole cover and the water tank top cover are engaged and limited to each other. As can be seen from the above, the overall opening and closing of the present invention is relatively convenient, effectively improving the portability of opening and closing the manhole cover, thereby improving the overall work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0013] Figure 2 is a sectional view of the present invention;

[0014] Figure 3 is for the present invention Figure 2 magnified view of part A;

[0015] Figure 4 This is a partially enlarged structural schematic diagram of the present utility model.

[0016] In the figure: 1. Water tank top cover; 2. Manhole cover; 3. Rotating block; 4. Rotating cam; 5. Connecting plate; 6. Universal limiting ball; 7. Handwheel; 8. Lock body; 9. Hinge seat. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0018] Next, according to the overall structure of the present utility model, its embodiments will be described.

[0019] A manhole cover opening and closing mechanism for a circular heat-insulated water tank, as Figures 1-4 shown, includes a water tank top cover 1 and a manhole cover 2. A manhole matching the manhole cover 2 is opened at the center position inside the water tank top cover 1. A rotating block 3 is rotatably connected inside the manhole cover 2. A rotating cam 4 is fixed to the bottom of the rotating block 3. Two sides of the rotating cam 4 are movably connected with connecting plates 5 matching the inside of the water tank top cover 1. Slide grooves for sliding connection with the connecting plates 5 are opened on both sides inside the manhole cover 2, and connection grooves matching the connecting plates 5 are opened on both sides inside the water tank top cover 1. Universal limiting balls 6 extending into the rotating cam 4 are fixed to the inner sides of the two groups of connecting plates 5. A slide groove matching the universal limiting balls 6 is opened at the edge position inside the rotating cam 4, and the cross-sections of the universal limiting balls 6 and the slide groove are circular. When it is necessary to open the manhole cover 2, first, the lock body 8 is opened with a key to release the limit between the rotating block 3 and the manhole cover 2. At this time, the handwheel 7 is rotated, so that the handwheel 7 drives the rotating block 3 and the rotating cam 4 to rotate. Under the rotation of the rotating cam 4, the two groups of connecting plates 5 are driven to disengage from the limit on the inner side of the water tank top cover 1, so that the manhole cover 2 can be opened relative to the water tank top cover 1.

[0020] Please refer to Figure 1 , Figure 2 and Figure 3 , a handwheel 7 is fixed to the outside of the rotating block 3, and a lock body 8 is arranged inside the rotating block 3. By setting the above structure in the present utility model, the handwheel 7 facilitates the rotation of the rotating block 3 and the rotating cam 4.

[0021] Please refer to Figure 1 and Figure 2 , one side between the manhole cover 2 and the water tank top cover 1 is rotatably connected through a hinge seat 9. By setting the above structure in the present utility model, the hinge seat 9 facilitates the rotation between the manhole cover 2 and the water tank top cover 1.

[0022] The working principle of the present utility model is as follows: When in use, the manhole cover 2 and the water tank top cover 1 are rotatably connected through a hinge seat 9, and thus the manhole cover 2 can be opened;

[0023] When it is necessary to open the manhole cover 2, first use the key to open the lock body 8 to disengage the rotation block 3 from the manhole cover 2. At this time, rotate the handwheel 7, so that the handwheel 7 drives the rotation block 3 and the rotation cam 4 to rotate. Under the rotation of the rotation cam 4, the two connecting plates 5 are driven to disengage the limit of the inner side of the water tank top cover 1, so that the manhole cover 2 can be opened relative to the water tank top cover 1;

[0024] When it is necessary to close the manhole cover 2, just rotate the handwheel 7 in the reverse direction to insert the two connecting plates 5 into the inner side of the water tank top cover 1, so that the manhole cover 2 and the water tank top cover 1 are engaged and limited with each other. As can be seen from the above, the overall opening and closing of the present utility model is relatively convenient, effectively improving the portability of the opening and closing of the manhole cover 2, thereby improving the overall work efficiency.

[0025] Although the embodiments of the present utility model have been shown and described, the specific embodiments are only explanations of the present utility model and do not limit the utility model. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations without creative contributions to the embodiments according to needs, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. A circular insulated water tank manhole cover opening and closing mechanism, comprising a water tank top cover (1) and a manhole cover (2), characterized in that: A manhole matching the manhole cover (2) is provided at the center of the water tank top cover (1); a rotating block (3) is rotatably connected to the inside of the manhole cover (2); a rotating cam (4) is fixed to the bottom of the rotating block (3); and connecting plates (5) matching the inside of the water tank top cover (1) are movably connected to both sides of the rotating cam (4).

2. The circular thermal insulation water tank manhole cover opening and closing mechanism according to claim 1, characterized in that: Both sides of the manhole cover (2) are provided with sliding grooves that are slidably connected to the connecting plate (5), and both sides of the water tank top cover (1) are provided with connecting grooves that match the connecting plate (5).

3. The circular insulated water tank manhole cover opening and closing mechanism according to claim 1 is characterized in that: A universal limiting ball (6) extending into the interior of the rotating cam (4) is fixed to the inner side of the two groups of connecting plates (5); a sliding groove cooperating with the universal limiting ball (6) is provided at the inner edge of the rotating cam (4); and the cross-sections of the universal limiting ball (6) and the sliding groove are circular.

4. The circular insulated water tank manhole cover opening and closing mechanism according to claim 1, characterized in that: A hand wheel (7) is fixed on the outside of the rotating block (3), and a lock body (8) is arranged inside the rotating block (3).

5. The circular thermal insulation water tank manhole cover opening and closing mechanism according to claim 1, characterized in that: One side between the manhole cover (2) and the water tank top cover (1) is rotatably connected via a hinge seat (9).

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