Purifying and recycling equipment for treatment of breeding tail water

Abstract

The invention discloses purification and recycling equipment for treatment of breeding tail water, the purification and recycling equipment comprises a base, a frame arranged at the top of the base and a tank body mounted in the frame, the top of the base is fixedly connected with a vertical plate, the vertical plate is located on the back surface of the frame, and the interior of the frame is fixedly connected with a sleeve. The rear end of the sleeve penetrates through the vertical plate and is movably connected with the vertical plate, the frame can carry the tank body to swing with the sleeve as the axis, a transmission structure is arranged on the back face of the vertical plate, the transmission structure can drive the sleeve to rotate in a reciprocating mode, and the transmission structure comprises a connecting plate fixedly connected to the back face of the base. The surfaces of the connecting plates are movably connected with rotating wheels through bearings. By designing a tank body structure capable of swinging, impurities on the surface of the filter element are not cleaned only by back flushing, and the flushing effect is improved. And the tank body can swing, so that the water flow direction can be changed, the washing force on the surface of the filter element is increased, and the impurities can be discharged more effectively.

Description

Technical Field

[0001] The invention relates to the technical field of aquaculture tail water treatment, in particular to a purification and reuse device for aquaculture tail water treatment. Background Art

[0002] Aquaculture tailwater treatment is an important environmental issue, which is of great significance for protecting water resources, maintaining ecological balance and promoting the sustainable development of aquaculture. With the rapid development of aquaculture, the problem of aquaculture tailwater discharge has become increasingly prominent. Untreated aquaculture tailwater directly discharged into the environment will pollute the water body, affect water quality safety, and further threaten the ecological environment and human health. Therefore, effective treatment of aquaculture tailwater to achieve standard discharge or resource utilization is an important measure to ensure the sustainable development of aquaculture.

[0003] For example, the patent application number published on the China Patent Network is: 202021168717.4, and the patent name is: Aquaculture tailwater treatment equipment, which solves the problem that the current aquaculture tailwater treatment construction is mainly through the filling medium, which is mostly sand and gravel, and other high-density filter materials, so as to block and filter the particulate pollutants in the tailwater, but this method cannot be stirred during operation. Usually, after a short period of operation, the matrix will be blocked, which significantly reduces the filtration treatment efficiency. The aquaculture tailwater treatment equipment includes a tailwater treatment cylinder, and a total of five sets of anti-blocking mechanisms are installed inside the tailwater treatment cylinder. Because the rectangular opening is less impacted by the tailwater flow discharged from the tailwater discharge pipe port, a large amount of particulate pollutants flowing into the rectangular opening will gather at the opening end below the rectangular opening, while the tailwater continues to permeate through the filter matrix and be discharged. Through this design, the time period of the filter matrix from high permeability to blockage to low permeability is greatly increased.

[0004] However, the cleaning method of existing treatment equipment is relatively simple, which mainly uses back flushing to flush out the filtered impurities attached to the surface of the filter element. The filter element can penetrate the liquid, resulting in a decrease in the water flow pressure at the tail end of the filter element, affecting the flushing effect.

[0005] Therefore, it is necessary to design and transform the purification and reuse equipment for aquaculture effluent treatment. Summary of the invention

[0006] In order to solve the problems raised in the above-mentioned background technology, the purpose of the present invention is to provide a purification and reuse equipment for aquaculture effluent treatment, which has the advantage of improving the cleaning efficiency and solves the problem that the cleaning method of the existing treatment equipment is relatively single, mainly through back flushing to flush out the filtered impurities attached to the surface of the filter element, and the filter element can penetrate the liquid, resulting in a decrease in the water flow pressure at the tail end of the filter element, affecting the flushing effect.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a purification and reuse device for aquaculture tail water treatment, comprising a base;

[0008] a frame disposed on top of the base;

[0009] A tank mounted inside the frame;

[0010] The top of the base is fixedly connected with a vertical plate, and the vertical plate is located on the back of the frame. The interior of the frame is fixedly connected with a sleeve, and the rear end of the sleeve passes through the vertical plate and is movably connected with the vertical plate. The frame can carry the tank body and swing around the sleeve as the axis. A transmission structure is provided on the back of the vertical plate, and the transmission structure can drive the sleeve to rotate reciprocatingly.

[0011] As a preferred embodiment of the present invention, the transmission structure includes a connecting plate fixedly connected to the back side of the base, the surface of the connecting plate is movably connected to a rotating wheel via a bearing, the surface of the sleeve is fixedly connected to a sleeve plate located on the front side of the rotating wheel, a protrusion is provided on the front side of the rotating wheel and the protrusion extends to the interior of the sleeve plate and is slidably connected to the sleeve plate, and the protrusion can be used to drive the sleeve plate to swing back and forth during the rotation of the rotating wheel.

[0012] As a preferred embodiment of the present invention, both sides of the back side of the base are fixedly connected with brackets, the inner side of the bracket is movably connected with a reciprocating screw through a bearing, one side of the bracket is fixedly connected with a transmission motor, the transmission motor can drive the reciprocating screw to rotate, the surface of the reciprocating screw is threadedly connected with a tooth plate, the back side of the rotating wheel is fixedly connected with a gear located on the back side of the connecting plate, the gear is located at the bottom of the tooth plate and meshes with the tooth plate.

[0013] As a preferred embodiment of the present invention, extension rods are fixedly connected to both sides of the tooth plate, and a roller is movably connected to the side of the extension rod away from the tooth plate through a pin, and the bottom of the roller is flush with the bottom of the base.

[0014] As a preferred embodiment of the present invention, both sides of the bottom of the frame are fixedly connected with spring plates, a side of the spring plate away from the frame is in contact with the top of the base, and the spring plate is elastic.

[0015] As a preferred embodiment of the present invention, one side of the interior of the tank body is connected to a filter element, and the interior of the tank body is movably connected to a threaded component through a bearing, and scrapers are threadedly connected on both sides of the surface of the threaded component, and the scrapers are sleeved on the surface of the filter element and are slidably connected to the filter element.

[0016] As a preferred embodiment of the present invention, a transmission rod is fixedly connected to the back side of the vertical plate, and the side of the transmission rod away from the vertical plate sequentially passes through the sleeve and the tank body and extends to the interior of the tank body. A linkage structure is provided at one end of the transmission rod located inside the tank body, and the linkage structure can drive the threaded assembly to rotate.

[0017] As a preferred embodiment of the present invention, the linkage structure includes a pawl fixedly connected to the front end of the transmission rod, the interior of the tank body is fixedly connected to a crossbeam located on the back side of the threaded assembly, the surface of the crossbeam is movably connected to a ratchet through a bearing, the pawl is located at the top of the ratchet and meshes with the ratchet, the front side of the ratchet and the surface of the threaded assembly are fixedly connected to a bevel cone, and the bevel cones mesh with each other.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention improves the flushing effect by designing a swingable tank structure, which no longer relies solely on backwashing to clean impurities on the surface of the filter element. Since the tank can swing, it helps to change the direction of water flow and increase the flushing force on the surface of the filter element, thereby more effectively discharging impurities.

[0020] 2. The present invention uses the cooperation between the rotating wheel and the sleeve plate, as well as the protrusion design on the rotating wheel, so that the sleeve can drive the frame and the tank body to swing back and forth when the rotating wheel rotates, thereby simplifying the transmission structure. This design avoids complex mechanical transmission, making the structure of the entire equipment more concise and easy to maintain.

[0021] 3. The present invention drives the reciprocating screw to rotate through the transmission motor, and then drives the reciprocating motion of the tooth plate and the gear, providing stable power for the swing of the casing and the tank body, and enhancing the automation of the equipment. The use of the transmission motor enables the equipment to automatically perform cleaning operations, reducing manual intervention.

[0022] 4. The present invention reduces frictional resistance. The design of the roller enables the toothed plate to slide more smoothly during movement, reduces frictional resistance between the toothed plate and the base, and improves the stability of the device. The roller is flush with the bottom of the base, which helps to maintain the balance of the device and prevents shaking during the swinging process.

[0023] 5. The present invention provides a buffering effect. The design of the spring plate enables the frame to be buffered to a certain extent during the swinging process, reducing the impact on the base and extending the life of the equipment. The elastic effect of the spring plate helps to reduce the wear of the equipment, thereby extending the service life of the entire equipment.

[0024] 6. The present invention can clean the surface of the filter element while the tank body is swinging through the cooperation of the threaded assembly and the scraper, thereby improving the cleaning efficiency and enhancing the practicability of the equipment. This design makes the equipment not only suitable for treating aquaculture tail water, but also can be applied to other fields that require filtration and cleaning.

[0025] 7. The present invention uses a linkage structure design so that the rotation of the transmission rod can drive the threaded assembly to rotate, thereby driving the scraper to clean the filter element, thereby simplifying the operation process. This design avoids additional transmission devices, making the entire cleaning process more concise and efficient.

[0026] 8. The present invention enables the transmission rod to drive the threaded assembly to rotate in one direction through the cooperation of the pawl and the ratchet wheel, thus avoiding the adverse effect of reverse rotation on the equipment and enhancing the reliability of the equipment. The meshing design of the helical cone makes the transmission more stable and reliable, and improves the operating efficiency of the entire equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 It is a right view structural schematic diagram of the present invention;

[0029] Figure 3 It is a rear view structural schematic diagram of the present invention;

[0030] Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention;

[0031] Figure 5 It is a rear view schematic diagram of a local structure of the present invention;

[0032] Figure 6 For the present invention Figure 4 Enlarged structural diagram at A in the middle.

[0033] In the figure: 1. base; 2. frame; 3. tank body; 4. vertical plate; 5. sleeve; 6. transmission structure; 7. connecting plate; 8. rotating wheel; 9. sleeve plate; 10. bracket; 11. reciprocating screw; 12. transmission motor; 13. tooth plate; 14. gear; 15. extension rod; 16. roller; 17. spring plate; 18. filter element; 19. threaded assembly; 20. scraper; 21. transmission rod; 22. pawl; 23. crossbeam; 24. ratchet; 25. bevel tooth cone. DETAILED DESCRIPTION

[0034] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0035] like Figures 1 to 6 As shown, the present invention provides a purification and reuse device for aquaculture tail water treatment, comprising a base 1;

[0036] A frame 2 is arranged on the top of the base 1;

[0037] The tank body 3 installed inside the frame 2 can clean the filter element 18 by reverse flushing. Reverse flushing belongs to the prior art. The filter element 18 can be flushed by injecting water in the reverse direction through the drain pipe. It is not innovative, so it is not described. The water inlet is provided by the water inlet pipe on one side of the tank body, which can be connected with the pipeline in the prior art. The water pressure in the pipeline can meet the input pressure requirement of the liquid. In the prior art, the liquid is mainly pumped in by a pump body, but the pump body is part of the pipeline system.

[0038] A vertical plate 4 is fixedly connected to the top of the base 1, and the vertical plate 4 is located on the back of the frame 2. A sleeve 5 is fixedly connected to the inside of the frame 2. The rear end of the sleeve 5 passes through the vertical plate 4 and is movably connected to the vertical plate 4. The frame 2 can carry the tank body 3 and swing around the sleeve 5 as the axis. A transmission structure 6 is provided on the back of the vertical plate 4, and the transmission structure 6 can drive the sleeve 5 to rotate reciprocatingly. Elastic bellows are installed on both sides of the tank body 3, so when the equipment is swinging, the bellows can be deformed and remain connected. The risk of rupture caused by excessive swinging can be overcome by selecting high-strength materials and replacing them.

[0039] refer to Figure 3 The transmission structure 6 includes a connecting plate 7 fixedly connected to the back of the base 1, and the surface of the connecting plate 7 is movably connected to a rotating wheel 8 through a bearing. The surface of the sleeve 5 is fixedly connected to a sleeve plate 9 located in front of the rotating wheel 8. A protrusion is provided on the front of the rotating wheel 8 and the protrusion extends to the inside of the sleeve plate 9 and is slidably connected to the sleeve plate 9. During the rotation of the rotating wheel 8, the sleeve plate 9 can be driven to swing back and forth by the protrusion.

[0040] As a technical optimization solution of the present invention, through the cooperation of the rotating wheel 8 and the sleeve plate 9, and the protrusion design on the rotating wheel 8, the sleeve 5 can drive the frame 2 and the tank body 3 to swing back and forth when the rotating wheel 8 rotates, simplifying the transmission structure 6. This design avoids complex mechanical transmission, making the structure of the entire device more concise and easy to maintain.

[0041] refer to Figure 3 , brackets 10 are fixedly connected to both sides of the back of the base 1, and a reciprocating screw 11 is movably connected to the inner side of the bracket 10 through a bearing, and a transmission motor 12 is fixedly connected to one side of the bracket 10. The transmission motor 12 can drive the reciprocating screw 11 to rotate. A toothed plate 13 is threadedly connected to the surface of the reciprocating screw 11, and a gear 14 located on the back of the connecting plate 7 is fixedly connected to the back of the rotating wheel 8. The gear 14 is located at the bottom of the toothed plate 13 and meshes with the toothed plate 13.

[0042] As a technical optimization solution of the present invention, the transmission motor 12 drives the reciprocating screw 11 to rotate, thereby driving the reciprocating motion of the tooth plate 13 and the gear 14, providing a stable power for the swing of the sleeve 5 and the tank body 3, thereby enhancing the automation of the equipment. The use of the transmission motor 12 enables the equipment to automatically perform the cleaning operation, reducing manual intervention.

[0043] refer to Figure 3 Extension rods 15 are fixedly connected to both sides of the tooth plate 13. A roller 16 is movably connected to the side of the extension rod 15 away from the tooth plate 13 through a pin. The bottom of the roller 16 is flush with the bottom of the base 1.

[0044] As a technical optimization solution of the present invention, the design of the roller 16 reduces the friction resistance, so that the tooth plate 13 can slide more smoothly during the movement, reduce the friction resistance between the tooth plate 13 and the base 1, and improve the stability of the device. The roller 16 is flush with the bottom of the base 1, which helps to maintain the balance of the device and prevent shaking during the swinging process.

[0045] refer to Figure 3 Both sides of the bottom of the frame 2 are fixedly connected with spring plates 17, and the side of the spring plate 17 away from the frame 2 is in contact with the top of the base 1, and the spring plate 17 is elastic.

[0046] As a technical optimization solution of the present invention, a buffering effect is provided. The design of the spring plate 17 enables the frame 2 to obtain a certain buffer during the swinging process, reduces the impact on the base 1, and prolongs the life of the equipment. The elastic effect of the spring plate 17 helps to reduce the wear of the equipment, thereby prolonging the service life of the entire equipment.

[0047] refer to Figure 3 One side of the tank body 3 is connected to a filter element 18, and a threaded component 19 is movably connected to the inside of the tank body 3 through a bearing. Scrapers 20 are threadedly connected to both sides of the surface of the threaded component 19. The scraper 20 is sleeved on the surface of the filter element 18 and is slidably connected to the filter element 18.

[0048] As a technical optimization solution of the present invention, through the cooperation of the threaded assembly 19 and the scraper 20, the surface of the filter element 18 can be cleaned while the tank body 3 is swinging, thereby improving the cleaning efficiency and enhancing the practicability of the equipment. This design makes the equipment not only suitable for treating aquaculture tail water, but also can be applied to other fields that require filtration and cleaning.

[0049] refer to Figure 6 A transmission rod 21 is fixedly connected to the back of the vertical plate 4. The side of the transmission rod 21 away from the vertical plate 4 passes through the sleeve 5 and the tank body 3 in sequence and extends to the inside of the tank body 3. A linkage structure is provided at one end of the transmission rod 21 located inside the tank body 3, and the linkage structure can drive the threaded assembly 19 to rotate.

[0050] As a technical optimization solution of the present invention, through the design of the linkage structure, the rotation of the transmission rod 21 can drive the threaded assembly 19 to rotate, thereby driving the scraper 20 to clean the filter element 18, simplifying the operation process. This design avoids additional transmission devices, making the entire cleaning process more concise and efficient.

[0051] refer to Figure 6 The linkage structure includes a pawl 22 fixedly connected to the front end of the transmission rod 21, and the interior of the tank body 3 is fixedly connected to a crossbeam 23 located on the back of the threaded component 19. The surface of the crossbeam 23 is movably connected to a ratchet 24 through a bearing. The pawl 22 is located at the top of the ratchet 24 and meshes with the ratchet 24. The front side of the ratchet 24 and the surface of the threaded component 19 are fixedly connected with a bevel cone 25, and the bevel cones 25 mesh with each other.

[0052] As a technical optimization solution of the present invention, the transmission rod 21 can drive the threaded assembly 19 to rotate in one direction through the cooperation of the pawl 22 and the ratchet 24, thereby avoiding the adverse effect of reverse rotation on the device and enhancing the reliability of the device. The meshing design of the helical cone 25 makes the transmission more stable and reliable, and improves the operating efficiency of the entire device.

[0053] The working principle and use process of the present invention are as follows: first, the various components on the surface of the equipment are mainly used for decoration to improve the overall aesthetics of the equipment and at the same time fit the existing equipment more closely. It is mainly used to reflect how the existing equipment is used to control the equipment. When the equipment is started, the aquaculture tail water is introduced into the tank body 3. A filter element 18 is arranged in the tank body 3. The filter element 18 filters the tail water to remove impurities and pollutants therein. As the filtration proceeds, a layer of filtered impurities will gradually accumulate on the surface of the filter element 18. In order to clean these impurities, the equipment adopts a unique swinging and rotating mechanism. Specifically, the transmission motor 12 starts to work, driving the reciprocating screw 11 to rotate. The tooth plate 13 threadedly connected to the surface of the reciprocating screw 11 moves back and forth under the rotation of the screw. The bottom of the tooth plate 13 is meshed with the gear 14 on the back of the runner 8. Therefore, the reciprocating movement of the tooth plate 13 will drive the gear 14 and the runner 8 to rotate. The protrusion arranged on the front of the runner 8 is slidably connected to the sleeve plate 9. As the runner 8 rotates, the protrusion will push the sleeve plate 9 to swing back and forth. The sleeve 5 is fixedly connected to the surface of the sleeve 5, so the swing of the sleeve 5 will drive the entire frame 2 and the tank body 3 to swing around the sleeve 5 as the axis. This swing helps to flush the impurities on the surface of the filter element 18 and improve the cleaning effect. At the same time, the threaded component 19 inside the tank body 3 also starts to work, and the transmission rod 21 drives the threaded component 19 to rotate through the linkage structure. The linkage structure includes a pawl 22 and a ratchet 24. The pawl 22 is fixedly connected to the front end of the transmission rod 21, and the ratchet 24 is movably connected to the inside of the tank body 3 through a bearing. On the crossbeam 23, the pawl 22 and the ratchet 24 are meshed with each other, and the beveled cone 25 on the front of the ratchet 24 is also meshed with the beveled cone 25 on the surface of the threaded component 19. Therefore, the rotation of the ratchet 24 will drive the threaded component 19 to rotate, and the scraper 20 on the surface of the threaded component 19 moves with the rotation of the threaded component 19. The scraper 20 is sleeved on the surface of the filter element 18 and is slidably connected to the filter element 18. The movement of the scraper 20 will further clean the impurities on the surface of the filter element 18 to ensure the continuous filtering effect of the filter element 18.

[0054] In summary, the purification and reuse equipment for aquaculture tailwater treatment, by designing a swingable tank body 3 structure, no longer relies solely on backwashing to clean impurities on the surface of the filter element 18, thereby improving the flushing effect. Since the tank body 3 can swing, it helps to change the direction of the water flow, increase the flushing force on the surface of the filter element 18, and thus more effectively discharge impurities. The filter element can save the effect of disassembling it by backwashing, scraping and cleaning, and vibrating flushing. At the same time, the filter element can also be replaced by turning the knob after the entire shell is opened.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A purification and recycling device for aquaculture tail water treatment, comprising a base (1); A frame (2) disposed on the top of the base (1); A tank (3) mounted inside the frame (2); Features: The top of the base (1) is fixedly connected to a vertical plate (4), the vertical plate (4) is located on the back of the frame (2), the interior of the frame (2) is fixedly connected to a sleeve (5), the rear end of the sleeve (5) passes through the vertical plate (4) and is movably connected to the vertical plate (4), the frame (2) can carry the tank body (3) and swing around the sleeve (5) as the axis, and a transmission structure (6) is arranged on the back of the vertical plate (4), and the transmission structure (6) can drive the sleeve (5) to rotate back and forth.

2. The purification and recycling equipment for aquaculture tail water treatment according to claim 1, characterized in that: The transmission structure (6) comprises a connecting plate (7) fixedly connected to the back of the base (1); the surface of the connecting plate (7) is movably connected to a rotating wheel (8) via a bearing; the surface of the sleeve (5) is fixedly connected to a sleeve plate (9) located on the front of the rotating wheel (8); a protrusion is provided on the front of the rotating wheel (8) and the protrusion extends to the inside of the sleeve plate (9) and is slidably connected to the sleeve plate (9); during the rotation of the rotating wheel (8), the sleeve plate (9) can be driven to swing back and forth by the protrusion.

3. The purification and recycling equipment for aquaculture tail water treatment according to claim 2, characterized in that: Both sides of the back side of the base (1) are fixedly connected to brackets (10), the inner side of the bracket (10) is movably connected to a reciprocating screw (11) via a bearing, one side of the bracket (10) is fixedly connected to a transmission motor (12), the transmission motor (12) can drive the reciprocating screw (11) to rotate, the surface of the reciprocating screw (11) is threadedly connected to a toothed plate (13), the back side of the rotating wheel (8) is fixedly connected to a gear (14) located on the back side of the connecting plate (7), the gear (14) is located at the bottom of the toothed plate (13) and meshes with the toothed plate (13).

4. The purification and recycling equipment for aquaculture tail water treatment according to claim 3, characterized in that: Extension rods (15) are fixedly connected to both sides of the tooth plate (13); a side of the extension rod (15) away from the tooth plate (13) is movably connected to a roller (16) via a pin; the bottom of the roller (16) is flush with the bottom of the base (1).

5. The purification and recycling equipment for aquaculture tail water treatment according to claim 1, characterized in that: Both sides of the bottom of the frame (2) are fixedly connected with spring plates (17), the side of the spring plate (17) away from the frame (2) is in contact with the top of the base (1), and the spring plate (17) is elastic.

6. The purification and recycling equipment for aquaculture tail water treatment according to claim 1, characterized in that: One side of the interior of the tank body (3) is connected to a filter element (18), and the interior of the tank body (3) is movably connected to a threaded component (19) via a bearing. Both sides of the surface of the threaded component (19) are threadedly connected to scrapers (20), and the scrapers (20) are sleeved on the surface of the filter element (18) and are slidably connected to the filter element (18).

7. The purification and recycling equipment for aquaculture tail water treatment according to claim 6, characterized in that: A transmission rod (21) is fixedly connected to the back of the vertical plate (4); the side of the transmission rod (21) away from the vertical plate (4) passes through the sleeve (5) and the tank body (3) in sequence and extends to the inside of the tank body (3); a linkage structure is provided at one end of the transmission rod (21) located inside the tank body (3); and the linkage structure can drive the threaded assembly (19) to rotate.

8. The purification and recycling equipment for aquaculture tail water treatment according to claim 7, characterized in that: The linkage structure comprises a ratchet pawl (22) fixedly connected to the front end of a transmission rod (21); a crossbeam (23) located at the back of a threaded assembly (19) is fixedly connected inside the tank body (3); a ratchet (24) is movably connected to the surface of the crossbeam (23) via a bearing; the ratchet pawl (22) is located at the top of the ratchet (24) and meshes with the ratchet (24); a beveled cone (25) is fixedly connected to the front of the ratchet (24) and the surface of the threaded assembly (19); and the beveled cones (25) mesh with each other.

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