Farm sewage pool top cover structure

Abstract

The utility model discloses a top cover structure of a farm sewage pool. The top cover structure comprises an assembly seat, an assembly cover with a sealing rubber ring, a lifting seat and a retractable clamping plate, the assembling seat is embedded in the top of a sewage pool and is provided with an inner port in the center; the assembling cover is hinged to the assembling base and seals the inner through opening through the sealing rubber ring. The lifting base is installed in a sinking groove in the assembly cover, an assembly cavity is formed in the lifting base, and the multiple sets of contraction clamping plates are distributed in the radial direction. And a positioning through hole is formed in the side wall of the positioning ring seat at the top of the assembly seat and nested with the contraction clamping plate. The lifting assembly and the telescopic assembly drive the lifting base and the telescopic clamping plate to move correspondingly. According to the design, through an exquisite lifting and stretching mechanism, the sealing performance is improved, harmful gas leakage is prevented, opening is easy, daily maintenance is convenient, and the requirements for environmental protection and working environment improvement are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related technical field of breeding industry, specifically is a farm sewage pool top cover structure. BACKGROUND

[0002] The sewage produced in the operation process of the farm is an inevitable byproduct of the breeding business. The sewage of the farm contains a large amount of organic matter, microorganisms and nitrogen and phosphorus nutrients, and if it is directly discharged without treatment, it will cause serious pollution to the surrounding water and environment. In order to solve this problem, the farm usually sets up a special sewage pool to collect and treat these sewage. The top cover structure of the sewage pool is very important, which is directly related to the efficiency of sewage treatment and the effectiveness of environmental protection.

[0003] At present, in the field of sewage treatment of the farm, the sewage pool usually adopts the traditional well cover type top cover structure. The main problem of this structure is that its sealing performance is poor, which cannot effectively prevent the escape of foul-smelling gas and harmful substances (such as methane, ammonia, etc.) inside the sewage pool. Due to the volatilization of these gases, not only the surrounding air environment is polluted, causing peculiar smell trouble, but also the health of the workers may be harmed, and even an explosive hazardous environment may be formed under certain conditions.

[0004] In addition, the traditional well cover is usually made of heavy materials such as concrete or metal, which not only increases the difficulty and cost of installation and maintenance, but also because of its strong fixation, once the sewage pool needs to be checked or maintained, it becomes extremely difficult and time-consuming to remove and replace these heavy well covers. UTILITY MODEL CONTENT

[0005] In view of the above shortcomings in the prior art, the utility model aims to provide a farm sewage pool top cover structure. The sealing performance is improved to prevent the escape of harmful gases, and it also has the advantages of easy operation and maintenance, which not only meets the basic needs of sewage treatment in the farm, but also makes positive contributions to environmental protection and improvement of the working environment in the farm.

[0006] The technical scheme adopted by the utility model to achieve the above-mentioned purpose is: a farm sewage pool top cover structure, comprising an assembly seat, an assembly cover, a lifting seat, a contraction clamping plate, the assembly seat is buried in the top of the sewage pool, and an inner through hole is formed in the center of the assembly seat, the assembly cover is arranged in the assembly seat, and a sealing rubber ring for plugging the inner through hole is assembled on the outer edge of the assembly cover, a connecting piece is fixedly connected to the top of the assembly cover, and the connecting piece is hingedly connected with the outer edge of the assembly seat.

[0007] The upper surface of the assembly cover is provided with an assembly groove, the lifting seat is slidingly installed in the assembly groove and is lifted along the vertical direction, an assembly cavity is formed in the lifting seat, a plurality of groups of contraction clamping plates are slidingly installed in the assembly cavity and are distributed along the radial direction of the assembly cavity, a positioning ring seat is fixedly connected to the top outer edge of the assembly seat, and a positioning through hole is formed in the side wall of the positioning ring seat and is nested and connected with the contraction clamping plate.

[0008] The lifting assembly is linked with the lifting seat and drives the lifting seat to move up and down, and the telescopic assembly is linked with the contraction clamping plate and drives the contraction clamping plate to move telescopically.

[0009] In some embodiments, in order to ensure that the sealing rubber ring of the assembly cover can effectively seal the inner through hole of the assembly seat and ensure that the sealing rubber ring can be stably assembled at the bottom outer edge of the assembly cover, the following technical solutions are provided.

[0010] The inner through hole is provided with a first step surface and a second step surface arranged from outside to inside and from top to bottom, the bottom outer edge of the assembly cover is provided with an assembly ring groove, the sealing rubber ring comprises a first rubber ring and a second rubber ring arranged in the assembly ring groove and sealingly matched with the first step surface and the second step surface respectively, and an assembly ring seat for fixing the first rubber ring and the second rubber ring is fixedly nested in the assembly ring groove.

[0011] In some embodiments, in order to ensure that the lifting seat can be stably assembled in the assembly groove of the assembly cover, and to ensure that the contraction clamping plate, the lifting assembly and the telescopic assembly can be stably assembled in the assembly groove or the assembly cavity, the following technical solutions are provided.

[0012] The inner wall of the assembly groove is uniformly fixedly connected with a plurality of groups of vertically arranged guide sliding rails, the bottom outer edge of the lifting seat is fixedly connected with a guide ring seat, the guide ring seat is slidingly combined with the guide sliding rails, a limiting ring seat that is matched with the outer wall of the lifting seat is fixedly arranged at the top of the assembly groove, and the guide ring seat is arranged below the limiting ring seat; the top of the lifting seat is fixedly connected with a mounting cover plate for blocking the assembly cavity.

[0013] In some embodiments, in order to ensure that the contraction clamping plate can stably slide in the assembly cavity and to ensure that the telescopic assembly can be stably assembled in the assembly cavity and drive the telescopic movement of each group of contraction clamping plates, the following technical solutions are provided.

[0014] The bottom of the assembly cavity is provided with a radially arranged guide sliding groove, and the inner side end of the retractable clamping plate is fixedly connected with a guide sliding seat which is in sliding combination with the guide sliding groove; the telescopic assembly comprises a rotating disc, a first hand wheel, a plurality of connecting rods, and a worm gear and a worm which are in matched combination, the rotating disc is rotatably installed at the shaft center of the assembly cavity, the two ends of the connecting rod are respectively hingedly connected with the retractable clamping plate and the outer edge of the rotating disc, the worm gear is fixedly connected to the rotating disc, the worm is rotatably installed in the inner wall of the mounting cover plate, and the first hand wheel is rotatably installed on the mounting cover plate and is in power connection with the worm.

[0015] In some embodiments, in order to ensure that the lifting assembly is stably installed in the assembly cover and the lifting seat, and to ensure that the lifting assembly can stably lift the lifting seat, the following technical solutions are provided.

[0016] The lifting seat comprises a threaded sleeve and a second hand wheel, an assembly shaft and a threaded shaft which are fixedly connected in sequence from top to bottom, the assembly shaft is rotatably installed at the shaft center of the rotating disc and the worm gear, the second hand wheel is rotatably installed on the mounting cover plate and arranged outside the mounting cover plate, the threaded sleeve is fixedly installed at the shaft center of the assembly sink, and the threaded shaft is arranged in the assembly sink and rotatably connected with the threaded sleeve.

[0017] The assembly cover and the inner through opening connection of the assembly seat are provided with two groups of sealing rubber rings, realizing double-layer sealing effect of the assembly cover on the inner through opening, and effectively avoiding the leakage of toxic gas and odor in the sewage tank. The two groups of sealing rubber rings are fixed through the assembly ring seat, facilitating disassembly, replacement and adjustment of the opening and closing posture of the assembly cover. The lifting seat, the retractable clamping plate, the lifting assembly and the telescopic assembly matched on the assembly cover cooperate to enable the retractable clamping plate to be inserted into the positioning through hole on the assembly seat, and to exert downward force on the assembly cover and the sealing rubber ring, further improve the contact area of the sealing rubber ring and the inner through opening, improve the sealing effect on the sewage tank, and facilitate the adjustment of the opening and closing posture of the assembly cover. The components are assembled in a detachable manner, which has the advantages of convenient operation and maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure of the utility model is shown in the figure;

[0019] Figure 2 The structure of the utility model is shown in the figure;

[0020] Figure 3 The structure of the utility model is shown in the figure; Figure 2

[0021] Figure 4 The structure of the utility model is shown in the figure; Figure 3

[0022] ​​Figure 5 Assembled in the Figure 3 Structure schematic view of the assembled cover, lifting seat, contraction clamping plate, lifting assembly and telescopic assembly;

[0023] Figure 6 Assembled in the Figure 3 Structure schematic view of the disassembled cover;

[0024] Figure 7 Structure schematic view of the assembled cover, lifting seat, contraction clamping plate, lifting assembly and telescopic assembly.

[0025] In the figure: 1 assembly seat, 11 inner through port, 111 first step surface, 112 second step surface, 12 positioning ring seat, 121 positioning through hole, 13 gasket ring, 131 reinforcing rib plate, 14 hinged seat, 15 arc-shaped leakage hole, 2 assembly cover, 21 connecting piece, 221 first rubber ring, 222 second rubber ring, 23 assembly groove, 231 guide sliding rail, 232 limiting ring seat, 24 assembly ring groove, 25 assembly ring seat, 3 lifting seat, 31 assembly cavity, 311 guide sliding groove, 32 guide ring seat, 33 mounting cover plate, 4 contraction clamping plate, 41 limiting protrusion, 42 guide sliding seat, 51 threaded sleeve, 52 No. 2 hand wheel, 53 assembly shaft, 54 threaded shaft, 61 rotating disc, 62 No. 1 hand wheel, 621 driving bevel gear, 63 connecting rod, 64 worm wheel, 65 worm, 651 transmission bevel gear. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Please refer to Figures 1-7 , the top cover structure of the farm sewage pool comprises an assembly seat 1, an assembly cover 2, a lifting seat 3 and a contraction clamping plate 4. The assembly seat 1 is embedded in the top of the sewage pool, and an inner through port 11 is formed in the center of the assembly seat 1. The assembly cover 2 is arranged in the assembly seat 1, and a sealing rubber ring for plugging the inner through port 11 is arranged on the outer edge of the assembly cover 2. A connecting piece 21 is fixedly connected to the top of the assembly cover 2, and the connecting piece 21 is hingedly connected to the outer edge of the assembly seat 1.

[0028] The upper surface of the assembly cover 2 is provided with an assembly groove 23. The lifting seat 3 is slidably installed in the assembly groove 23 and moves up and down in the vertical direction. The interior of the lifting seat 3 is provided with an assembly cavity 31. Multiple sets of shrinking plates 4 are slidably installed in the assembly cavity 31 and distributed radially along the assembly cavity 31. The top outer edge of the assembly seat 1 is fixedly connected with a positioning ring seat 12. The side wall of the positioning ring seat 12 is provided with a positioning through hole 121 that is nested and inserted with the shrinking plates 4.

[0029] It also includes a lifting component and a telescopic component. The lifting component is linked with the lifting seat 3 and drives the lifting seat 3 to move up and down. The telescopic component is linked with the shrinking plate 4 and drives the shrinking plate 4 to move forward and backward.

[0030] The bottom of the mounting base 1 is embedded in the top of the sewage tank, and it is cast into a unified whole with the top wall of the sewage tank by concrete. To ensure the stability of the mounting base 1 installed on the top wall of the sewage tank, the mounting base 1 and the internal opening 11 inside it allow personnel to easily enter and exit the sewage tank for cleaning and maintenance. A gasket 13 is fixed to the outer edge of the bottom of the mounting base 1, and reinforcing ribs 131 are provided on the upper and lower sides of the gasket 13 to be fixed to the outer wall of the mounting base 1. The gasket 13 and the reinforcing ribs 131 are cast into the top wall of the sewage tank by concrete. Since the gasket 13 and the reinforcing ribs 131 can increase the contact area between the mounting base 1 and the concrete layer, the stability of the casting construction of the mounting base 1 is ensured, and the odor and toxic gases in the sewage tank can be effectively prevented from spreading outward from the connection between the mounting base 1 and the top wall of the sewage tank.

[0031] A hinge seat 14 is also fixed to the outside of the mounting base 1 so that the connector 21 fixed to the mounting cover 2 is hinged to the hinge seat 14, which can control the rotation of the mounting cover 2 around the hinge seat 14 to control the opening and closing posture of the inner opening 11 of the mounting base 1.

[0032] It should also be noted that, since the mounting cover 2 is hinged to one side of the mounting base 1, in order to avoid the movement interference between the mounting cover 2 and the inner opening 11 of the mounting base 1 during the flipping process, there is an assembly gap between the mounting base 1 and the mounting cover 2 (the two are not in direct contact) to ensure that the mounting cover 2 can be flipped normally without being limited by the mounting base 1. The sealing effect of the mounting cover 2 on the inner opening 11 is mainly achieved by the sealing rubber ring.

[0033] After the assembly cover 2 is embedded in the inner through hole 11, the telescopic assembly is controlled to drive the retractable clamping plate 4 to extend into the assembly cavity 31 and be inserted into the positioning through hole 121 of the positioning ring seat 12. Then the lifting assembly is controlled to drive the lifting seat 3 and the retractable clamping plate 4 assembled thereon to ascend synchronously, so that the retractable clamping plate 4 abuts against the top wall of the positioning through hole 121. Correspondingly, the retractable clamping plate 4 can apply a reverse downward force to the assembly cover 2, so that the assembly cover 2 can press and deform the sealing rubber ring assembled thereon, increase the contact area of the sealing rubber ring with the inner through hole 11 of the assembly seat 1, and avoid leakage of odor and toxic gas in the sewage tank from the connection between the assembly cover 2 and the inner through hole 11.

[0034] When the assembly cover 2 is opened to facilitate personnel to enter and exit the sewage tank or to clean the sewage tank, the above-mentioned closing mode of the assembly cover 2 is reversed. First, the lifting seat 3 and the retractable clamping plate 4 are controlled to descend to cancel the downward force applied to the assembly cover 2 and the sealing rubber ring. Then the retractable clamping plate 4 is controlled to retract to cancel the limiting action of the positioning through hole 121. After that, the assembly cover 2 and the components assembled thereon can be rotated upward around the hinge seat 14.

[0035] It should be further pointed out that the outer end of each retractable clamping plate 4 is fixedly connected with a limiting protrusion 41. After the retractable clamping plate 4 extends into the positioning through hole 121 and ascends under the action of the lifting assembly, the limiting protrusion 41 can effectively prevent the retractable clamping plate 4 from sliding out of the positioning through hole 121.

[0036] To avoid the influence of rain, snow and dust accumulated on the inner side of the positioning ring seat 12 on the normal opening and closing of the assembly cover 2, arc-shaped drain holes 15 are uniformly provided on the assembly seat 1. The arc-shaped drain holes 15 are arranged between the positioning ring seat 12 and the inner through hole 11, and the precipitation and dust can be discharged outside the assembly seat 1 through the arc-shaped drain holes 15.

[0037] To ensure that the sealing rubber ring of the assembly cover 2 can effectively seal the inner through hole of the assembly seat 1 and ensure that the sealing rubber ring can be stably assembled at the outer edge of the bottom of the assembly cover 2, the following technical solutions are provided.

[0038] The inner through hole 11 is provided with a first step surface and a second step surface 112 arranged in sequence from outside to inside and from top to bottom. The bottom outer edge of the assembly cover 2 is provided with an assembly ring groove 24. The sealing rubber ring comprises a first rubber ring 221 and a second rubber ring arranged in the assembly ring groove 24 and in sealing contact with the first step surface and the second step surface 112 respectively. The assembly ring groove 24 is further fixedly nested with an assembly ring seat 25 for fixing the first rubber ring 221 and the second rubber ring.

[0039] The first step surface and the second step surface 112 are in sealing contact with the first rubber ring 221 and the second rubber ring, realizing double-layer sealing effect of the assembly cover 2 on the inner through hole 11, which can effectively prevent the toxic gas and odor in the sewage tank from leaking out.

[0040] The cross section of the first rubber ring 221 and the second rubber ring is provided in one of Y-shaped structure and Z-shaped structure or a combination of both, to ensure that it can be stably nested in the assembly ring groove 24. The assembly ring seat 25 is placed in the assembly ring groove 24 and further fixed to the first rubber ring 221 and the second rubber ring, to avoid falling out of the assembly ring groove 24. At the same time, the assembly ring seat 25 is fixed to the assembly cover 2 by bolts.

[0041] In order to ensure that the assembly ring seat 25 interferes with the inner through port 11 when the assembly cover 2 drives the assembly ring seat 25 to overturn, an assembly gap is also provided between the assembly ring seat 25 and the inner through port 11.

[0042] In order to ensure that the lifting seat 3 can be stably assembled in the assembly sink groove 23 of the assembly cover 2, and to ensure that the shrinkage clamping plate 4, the lifting assembly and the telescopic assembly are stably assembled in the assembly sink groove 23 or the assembly cavity 31, the following technical solutions are provided.

[0043] The inner wall of the assembly sink groove 23 is uniformly fixed with a plurality of vertically arranged guide rails 231. The bottom outer edge of the lifting seat 3 is fixedly connected with a guide ring seat 32, and the guide ring seat 32 and the guide rails 231 are in sliding combination. The top of the assembly sink groove 23 is fixedly connected with a limiting ring seat 232 which is in close contact with the outer wall of the lifting seat 3, and the guide ring seat 32 is arranged below the limiting ring seat 232. The top of the lifting seat 3 is fixedly connected with a mounting cover plate 33 for sealing the assembly cavity 31.

[0044] The combination of the guide ring seat 32 and the guide rails 231 can ensure the stable lifting of the lifting seat 3 in the vertical direction, and the limiting ring seat 232 is used to limit the lifting seat 3 assembled in the assembly sink groove 23, to avoid the lifting seat 3 from being separated from the assembly sink groove 23. The limiting ring seat 232 is fixed to the assembly sink groove 23 by bolts, which facilitates the disassembly and assembly of the lifting seat 3 and other components installed in the assembly sink groove 23.

[0045] The mounting cover plate 33 can open the assembly cavity 31 inside the lifting seat 3, facilitating the disassembly and assembly of the shrinkage clamping plate 4, the telescopic assembly and the lifting assembly in the assembly cavity 31.

[0046] In order to ensure that the shrinkage clamping plate 4 can stably slide in the assembly cavity 31, and to ensure that the telescopic assembly is stably assembled in the assembly cavity 31 and drives the telescopic movement of each group of shrinkage clamping plates 4, the following technical solutions are provided.

[0047] The bottom of the assembly cavity 31 is provided with a radially arranged guide sliding groove 311, and the inner side end of the retractable clamping plate 4 is fixedly connected with a guide sliding seat 42 which is in sliding combination with the guide sliding groove 311; the telescopic assembly comprises a rotating disc 61, a first hand wheel 62, a plurality of connecting rods 63, and a worm wheel 64 and a worm shaft 65 which are in matched combination, the rotating disc 61 is rotatably installed at the shaft center of the assembly cavity 31, the two ends of the connecting rod 63 are respectively hingedly connected with the retractable clamping plate 4 and the outer edge of the rotating disc 61, the worm wheel 64 is fixedly connected to the rotating disc 61, the worm shaft 65 is rotatably installed in the inner wall of the mounting cover plate 33, and the first hand wheel 62 is rotatably installed on the mounting cover plate 33 and is in power connection with the worm shaft 65.

[0048] The matched combination of the guide sliding groove 311 and the guide sliding seat 42 can ensure that the retractable clamping plate 4 stably slides along the radial direction of the assembly cavity 31, so as to control the telescopic posture of the retractable clamping plate 4; when the operation of the first hand wheel 62 drives the worm shaft 65 to rotate, the worm wheel 64 and the rotating disc 61 can be driven to stably operate, and then each group of retractable clamping plates 4 can be driven to synchronously perform telescopic movement through the connecting rod 63.

[0049] The first hand wheel 62 is arranged outside the mounting cover plate 33, and the bottom shaft center of the first hand wheel 62 is fixedly connected with a driving bevel gear 621 which is arranged in the assembly cavity 31, and the end of the worm shaft 65 is fixedly connected with a transmission bevel gear 651 which is in meshing connection with the driving bevel gear 621; when the first hand wheel 62 is operated to rotate, the worm shaft 65 can be driven to stably operate through the combination of the driving bevel gear 621 and the transmission bevel gear 651.

[0050] The combination of the worm wheel 64 and the worm shaft 65 also has a self-locking effect, that is, the power at the end of the worm wheel 64 cannot be reversely transmitted to the worm shaft 65, that is, the worm shaft 65 can lock the movement of the worm wheel 64, so that when the telescopic posture adjustment of the retractable clamping plate 4 is completed, each retractable clamping plate 4 always remains at a specific telescopic posture. It can avoid invalid sliding of the retractable clamping plate 4

[0051] In order to ensure that the lifting assembly is stably installed in the assembly cover 2 and the lifting seat 3, and to ensure that the lifting assembly can stably lift the lifting seat 3, the following technical solutions are provided.

[0052] The lifting seat 3 comprises a threaded sleeve 51 and a second hand wheel 52, an assembly shaft 53 and a threaded shaft 54 which are fixedly connected in sequence from top to bottom, the assembly shaft 53 is rotatably installed at the shaft center of the rotating disc 61 and the worm wheel 64, the second hand wheel 52 is rotatably installed on the mounting cover plate 33 and is arranged outside the mounting cover plate 33, the threaded sleeve 51 is fixedly installed at the shaft center of the assembly sink groove 23, and the threaded shaft 54 is arranged in the assembly sink groove 23 and is in screw connection with the threaded sleeve 51.

[0053] Since the assembly shaft 53 is in rotational combination with the rotating disc 61 and the worm gear 64 in the telescopic assembly, the independent operation of both will not cause motion interference to each other, ensuring the independence of the operation of both, when the second hand wheel 52 drives the assembly shaft 53 and the threaded shaft 54 to operate, the threaded shaft 54 can rotate in the threaded sleeve 51 to operate, thereby driving the lifting seat 3 and the whole lifting movement of the components installed therein.

[0054] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

[0055] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A structure for the roof of a sewage pond in a livestock farm, characterized in that: The assembly includes an assembly base (1), an assembly cover (2), a lifting seat (3), and a shrink plate (4). The assembly base (1) is embedded in the top of the sewage tank, and an inner opening (11) is provided at the center of the assembly base (1). The assembly cover (2) is arranged in the assembly base (1), and a sealing ring for sealing the inner opening (11) is fitted on the outer edge of the assembly cover (2). A connector (21) is fixedly connected to the top of the assembly cover (2), and the connector (21) is hinged to the outer edge of the assembly base (1). An assembly groove (23) is provided on the upper surface of the assembly cover (2), and the lifting seat (3) is slidably installed in the assembly groove (23) and moves along the edge of the assembly cover (2). The vertical lifting mechanism is provided with an assembly cavity (31) inside the lifting seat (3). Multiple sets of retractable plates (4) are slidably installed in the assembly cavity (31) and distributed radially along the assembly cavity (31). A positioning ring seat (12) is fixedly connected to the top outer edge of the assembly seat (1). A positioning through hole (121) is provided on the side wall of the positioning ring seat (12) and nested with the retractable plate (4). The mechanism also includes a lifting component and a telescopic component. The lifting component is linked with the lifting seat (3) and drives the lifting seat (3) to move up and down. The telescopic component is linked with the retractable plate (4) and drives the retractable plate (4) to move forward and backward.

2. The structure for the top cover of a livestock farm wastewater pond according to claim 1, characterized in that: The top of the inner opening (11) is provided with a first step surface and a second step surface (112) arranged sequentially from the outside to the inside and from the top to the bottom. The bottom outer edge of the assembly cover (2) is provided with an assembly ring groove (24). The sealing ring includes a first ring (221) and a second ring arranged in the assembly ring groove (24) and respectively maintaining a sealed fit with the first step surface and the second step surface (112). The assembly ring groove (24) is also fixedly nested with an assembly ring seat (25) for fixing the first ring (221) and the second ring.

3. The structure for the top cover of a livestock farm wastewater pond according to claim 1, characterized in that: The inner wall of the assembly sink (23) is uniformly fixed with multiple sets of vertically arranged guide rails (231). The bottom outer edge of the lifting seat (3) is fixed with a guide ring seat (32), and the guide ring seat (32) and the guide rails (231) maintain a sliding combination. The top of the assembly sink (23) is fixedly fitted with a limiting ring seat (232) that fits against the outer wall of the lifting seat (3). The guide ring seat (32) is arranged below the limiting ring seat (232). The top of the lifting seat (3) is fixed with an installation cover plate (33) for sealing the assembly cavity (31).

4. The structure for the top cover of a livestock farm sewage tank according to claim 3, characterized in that: The bottom of the assembly cavity (31) is provided with a radially arranged guide groove (311). The inner end of the retractable plate (4) is fixedly connected to a guide slide (42) that maintains a sliding combination with the guide groove (311). The telescopic assembly includes a rotating disk (61), a first handwheel (62), multiple sets of connecting rods (63), and a worm gear (64) and a worm (65) that maintain a matching combination. The rotating disk (61) is rotatably installed at the axis of the assembly cavity (31). The two ends of the connecting rod (63) are respectively hinged to the outer edge of the retractable plate (4) and the rotating disk (61). The worm gear (64) is fixedly connected to the rotating disk (61). The worm (65) is rotatably installed on the inner wall of the mounting cover plate (33). The first handwheel (62) is rotatably installed on the mounting cover plate (33) and is poweredly connected to the worm (65).

5. The structure for the top cover of a livestock farm sewage tank according to claim 4, characterized in that: The lifting seat (3) includes a threaded sleeve (51) and a second handwheel (52), an assembly shaft (53), and a threaded shaft (54) fixedly connected from top to bottom. The assembly shaft (53) is rotatably mounted on the axis of the rotating disk (61) and the worm gear (64). The second handwheel (52) is rotatably mounted on the mounting cover plate (33) and arranged on the outside of the mounting cover plate (33). The threaded sleeve (51) is fixedly mounted on the axis of the assembly groove (23). The threaded shaft (54) is arranged in the assembly groove (23) and is screwed to the threaded sleeve (51).

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