Pressure limiting structure of constant pressure water supply device for aquaculture

Abstract

The application is suitable for the technical field of constant pressure water supply device, and provides a constant pressure water supply device pressure limiting structure for breeding, which comprises an upper shell and a lower shell, an adjusting screw and an adjusting nut are arranged in the lower shell; a first motor for driving the adjusting nut to move along the adjusting screw is arranged in the lower shell; an upper limiting switch and a lower limiting switch for limiting control are arranged outside the lower shell; a lever is arranged on the adjusting nut, and the lever is used for triggering the upper limiting switch and the lower limiting switch; a base plate is arranged below the lower shell, and a heat preservation mechanism and a driving mechanism are arranged on the base plate. The constant pressure water supply device pressure limiting structure for breeding provided by the scheme realizes externalization of the upper limiting switch and the lower limiting switch through cooperation of the upper shell, the lower shell, the adjusting screw, the adjusting nut and the lever, and in combination with the optimized square through hole on the lower shell, the shell structure integrity is ensured, and the installation and maintenance difficulty is reduced.

Description

Technical Field

[0001] This invention belongs to the field of constant pressure water supply technology, and particularly relates to a pressure limiting structure for a constant pressure water supply for aquaculture. Background Technology

[0002] In large-scale livestock and poultry farming, constant pressure water supply line is a key device to ensure drinking water for livestock and poultry. It achieves precise control of water supply pressure through an automatic pressure regulation unit to meet the drinking water needs of livestock and poultry at different growth stages.

[0003] Existing document CN206237995U discloses a siphon constant pressure and constant flow automatic water supply device, including a water storage tank, a siphon, and a controller. Both the water storage tank and the siphon are sealed containers, while the controller is a container with an open top. The water storage tank and the siphon are connected by a connecting pipe at the bottom. The siphon has an air inlet pipe at the top and a water outlet pipe at the bottom. The water outlet pipe of the siphon is connected to the bottom of the controller. The air inlet pipe of the siphon extends into the controller from the top opening, and the length of the section of the air inlet pipe extending into the controller is adjustable. A water supply pipe is provided at the bottom of the controller, and the diameter of the water supply pipe is smaller than the diameter of the water outlet pipe of the siphon. A valve is provided on the water supply pipe.

[0004] As an important component of the automatic pressure regulation unit of the constant pressure water supply device, the mechanical limit structure has a lower limit switch responsible for the reference position control, and an upper limit switch to protect the components and prevent the motor or transmission mechanism from being damaged due to overload.

[0005] However, in the existing mechanical limit structure of constant pressure water supply devices, the limit switch and signal line are located inside the pressure regulator cavity. The signal line has a large bending angle, and checking the status of the limit switch requires disassembling the entire pressure regulator, which is cumbersome and reduces the efficiency of installation and maintenance. Summary of the Invention

[0006] This invention provides a pressure limiting structure for a constant pressure water supply device for aquaculture, solving the technical problem mentioned in the background art where the limit switch and signal line of the current mechanical limiting structure of constant pressure water supply devices are located inside the cavity, resulting in cumbersome installation and maintenance operations.

[0007] The present invention adopts the following technical solution.

[0008] A pressure limiting structure for a constant pressure water supply device used in aquaculture includes: an upper housing and a lower housing, wherein an adjusting screw and an adjusting nut are provided inside the lower housing; a first motor disposed inside the lower housing for driving the adjusting nut to move along the adjusting screw; an upper limit switch and a lower limit switch disposed outside the lower housing for limit control; a lever disposed on the adjusting nut for triggering the upper limit switch and the lower limit switch; and a base plate disposed below the lower housing, wherein a heat preservation mechanism and a driving mechanism are provided on the base plate.

[0009] Preferably, the heat preservation mechanism includes: a heat preservation shell disposed on the base plate and capable of accommodating the lower shell; an air cavity is provided on the heat preservation shell, and a plurality of air outlet holes are provided on the inner wall of the air cavity for guiding hot air into the heat preservation shell; a heat insulation box disposed on one side of the heat preservation shell, the heat insulation box being connected to the air cavity through a conduit; and an electric heating tube is provided inside the heat insulation box for heating the incoming air.

[0010] Preferably, the heat preservation mechanism further includes an air supply mechanism for supplying air to the heat insulation box, the air supply mechanism including: an air guide shell fixedly connected to the heat insulation box via a connecting pipe; an air inlet on the air guide shell for introducing external air; a rotating rod rotatably mounted in the air guide shell via a bearing; and fan blades fixed on the rotating rod for introducing external air into the heat insulation box.

[0011] Preferably, the drive mechanism includes: a second motor fixed to the base plate; a first spline tube rotatably mounted on the base plate via a bearing seat; both the output shaft of the second motor and the first spline tube are fixed with meshing first bevel teeth for transmitting the driving force of the second motor; an electric telescopic rod fixed to the base plate, with an assembly plate fixed to the push rod of the electric telescopic rod; an assembly frame fixed to the assembly plate, with a spline rod rotatably mounted on the assembly frame via a bearing, the bottom end of the spline rod being inserted into the first spline tube for power transmission; and both the spline rod and the rotating rod are fixed with meshing second bevel teeth.

[0012] Preferably, an adjustment plate is provided above the assembly plate, one end of the adjustment plate is fixedly connected to a detachable cover on the insulation shell, a limit block is fixed at the bottom of the cover, and a limit groove is provided on the insulation shell into which the limit block can be inserted for positioning.

[0013] Preferably, the assembly plate is provided with an assembly shell, and a second spline tube is rotatably installed in the assembly shell via a bearing. The top end of the second spline tube is fixedly connected to the adjusting plate, and the spline rod can be inserted into the second spline tube to drive the adjusting plate to rotate.

[0014] Preferably, the assembly plate is symmetrically fixed with sliding rods, and a sleeve block and a spring are sleeved on the sliding rods. The sleeve block is fixedly connected to the assembly shell, and the two ends of the spring are in contact with the sleeve block and the assembly plate, respectively.

[0015] Preferably, the bottom of the adjusting plate is symmetrically fixed with support columns, the bottom end of the support columns is inlaid with balls, and the top of the assembly shell is provided with an annular groove that matches the balls.

[0016] Preferably, a temperature controller is provided on one side of the heat insulation box, and the temperature controller is electrically connected to the heating element. The second motor is provided with a protective shell, which is fixedly connected to the base plate to protect the second motor.

[0017] Preferably, the lower housing has a square through hole, the lever extends through the square through hole to the outside of the lower housing, and both the upper limit switch and the lower limit switch are located outside the lower housing.

[0018] Compared with related technologies, the pressure limiting structure of the constant pressure water supply device for aquaculture provided by the present invention has the following beneficial effects: By using the upper and lower housings in conjunction with adjusting screws, adjusting nuts, and levers, the upper and lower limit switches are externally mounted. Combined with the optimized square through-hole on the lower housing, this ensures the integrity of the housing structure while reducing the difficulty of installation and maintenance. Through the linkage of the insulation shell, heat insulation box, electric heating tube, and gas supply mechanism, stable heat preservation of the lower housing is achieved, reducing the impact of low-temperature environments on the equipment. With the cooperation of the second motor, electric telescopic rod, and spline and bevel gear structure in the drive mechanism, the lifting and rotation of the cover are realized. Combined with the detachable design of the filter mechanism, the convenience of inspection and maintenance is further improved. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of a pressure limiting structure for a constant pressure water supply device for aquaculture provided by the present invention; Figure 2 This is a schematic diagram of the main sectional view of a pressure limiting structure for a constant pressure water supply device for aquaculture provided by the present invention; Figure 3 for Figure 2 An enlarged structural diagram of part A shown in the figure; Figure 4 for Figure 2 An enlarged structural diagram of part B shown in the figure; Figure 5 for Figure 2 An enlarged structural diagram of section C shown in the figure; Figure 6 for Figure 2 An enlarged structural diagram of part D shown in the figure; Figure 7 This is a three-dimensional structural diagram of the upper and lower shells in this invention; Figure 8 This is a cross-sectional view of the upper and lower shells in this invention. Figure 9 This is a cross-sectional view of the lower shell in this invention; Figure 10 This is a schematic diagram of the structure after the shell cover and the insulation shell are separated in this invention.

[0020] Reference numerals: 1. Upper housing; 2. Lower housing; 3. Adjusting screw; 4. Adjusting nut; 5. First motor; 6. Upper limit switch; 7. Lower limit switch; 8. Lever; 9. Base plate; 10. Insulation shell; 11. Air chamber; 12. Heat insulation box; 13. Conduit; 14. Shell cover; 15. Heating element; 16. Air guide shell; 17. Connecting pipe; 18. Rotating rod; 19. Fan blade; 20. First spline tube; 21. Second motor; 22. ... 23. First bevel gear; 24. Assembly plate; 25. Assembly frame; 26. Spline rod; 27. Second bevel gear; 28. Adjusting plate; 29. ​​Assembly shell; 20. Second spline tube; 31. Slide rod; 32. Sleeve block; 33. Spring; 34. Support column; 35. Ball bearing; 36. Groove block; 37. Connecting plate; 38. Mounting shell; 39. Filter plate; 40. Temperature controller; 41. Protective shell; 42. Limiting groove; 43. Limiting block; 44. Electric telescopic rod. Detailed Implementation

[0021] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] This invention provides a pressure limiting structure for a constant pressure water supply device used in aquaculture, such as... Figure 1-10 As shown, the pressure limiting structure of the constant pressure water supply device for aquaculture includes: an upper shell 1 and a lower shell 2, wherein the lower shell 2 is provided with an adjusting screw 3 and an adjusting nut 4; a first motor 5 is provided in the lower shell 2 to drive the adjusting nut 4 to move along the adjusting screw 3; an upper limit switch 6 and a lower limit switch 7 are provided outside the lower shell 2 for limit control; a lever 8 is provided on the adjusting nut 4, which is used to trigger the upper limit switch 6 and the lower limit switch 7; and a base plate 9 is provided below the lower shell 2, wherein the base plate 9 is provided with a heat preservation mechanism and a driving mechanism.

[0023] In this embodiment, when in use, the first motor 5 starts and drives the adjusting screw 3 to rotate. The adjusting screw 3 drives the adjusting nut 4 to move up and down along its axis. The adjusting nut 4 synchronously drives the lever 8 to move. When the lever 8 moves to the corresponding position, it triggers the upper limit switch 6 or the lower limit switch 7 to realize the limit control of pressure adjustment. At the same time, the upper limit switch 6 can protect the first motor 5 and related transmission mechanisms and reduce the possibility of overload damage. The insulation mechanism on the base plate 9 can provide insulation protection for the lower shell 2 in low-temperature environments, reducing the impact of moisture condensation inside the lower shell 2 on equipment operation. The drive mechanism can work with relevant components to realize the lifting and rotation of the shell cover 14, providing convenience for the maintenance of the internal components of the upper shell 1 and the lower shell 2 without disassembling the entire equipment. This structure, through the rational layout of the upper limit switch 6, lower limit switch 7, and related signal lines, reduces the operational difficulty during installation and improves installation efficiency. At the same time, it makes the status of the limit switches more intuitive and reduces tedious steps in the maintenance process. In addition, the structural integrity of the lower housing 2 is guaranteed, and its shear resistance during high-pressure water flushing is improved, which helps to extend the service life of the equipment.

[0024] In a further preferred embodiment of the present invention, the heat preservation mechanism includes: a heat preservation shell 10 disposed on the base plate 9 and capable of accommodating the lower shell 2; an air cavity 11 is provided on the heat preservation shell 10, and a plurality of air outlet holes are provided on the inner wall of the air cavity 11 for guiding hot air into the heat preservation shell 10; a heat insulation box 12 disposed on one side of the heat preservation shell 10, the heat insulation box 12 being connected to the air cavity 11 through a conduit 13; and an electric heating tube 15 is provided inside the heat insulation box 12 for heating the incoming air.

[0025] In this embodiment, when the lower shell 2 needs to be kept warm in a low-temperature environment, the electric heating tube 15 is activated to heat the air inside the heat insulation box 12. At the same time, the second motor 21 drives the first spline tube 20 to rotate through the first bevel tooth 22. The first spline tube 20 drives the spline rod 25 to rotate. The spline rod 25 drives the rotating rod 18 and the fan blade 19 to rotate through the second bevel tooth 26. The fan blade 19 draws in external air through the air guide shell 16 and sends it into the heat insulation box 12. The heated air enters the air chamber 11 through the conduit 13 and is then evenly sent into the heat insulation shell 10 through the air outlet, thereby achieving the heating and heat preservation of the lower shell 2. When it is necessary to inspect the internal components of the lower housing 2, the electric telescopic rod 43 is activated. Its push rod extends and drives the assembly plate 23 to rise. The spline rod 25 slides upward along the first spline tube 20, causing the two second bevel teeth 26 to separate. At the same time, the adjusting plate 27 drives the housing cover 14 to rise synchronously. The housing cover 14 separates from the heat insulation housing 10. The spring 32 is compressed by the sleeve block 31 under the gravity of the housing cover 14. The assembly housing 28 contacts the assembly plate 23 to achieve support. The spline rod 25 is inserted into the second spline tube 29. The second motor 21 is activated to drive the adjusting plate 27 and the housing cover 14 to rotate, which is convenient for personnel to operate. This insulation mechanism uses hot air circulation to insulate the lower shell 2, reducing the impact of internal moisture condensation into ice on equipment operation in low-temperature environments. The temperature controller 39 can assist in regulating the heating temperature and improve the adaptability of the insulation. The filter plate 38 inside the air guide shell 16 can filter dust and impurities in the air, reducing dust accumulation inside the equipment. The drive mechanism, in conjunction with the lifting and rotating of the shell cover 14, allows for maintenance without disassembling the entire equipment, reducing maintenance difficulty. The protective shell 40 can protect the second motor 21 and extend the service life of the components.

[0026] In a further preferred embodiment of the present invention, the heat preservation mechanism further includes an air supply mechanism for supplying air to the heat insulation box 12. The air supply mechanism includes: an air guide shell 16 fixedly connected to the heat insulation box 12 via a connecting pipe 17; an air inlet for introducing external air on the air guide shell 16; a rotating rod 18 rotatably mounted in the air guide shell 16 via a bearing; and a fan blade 19 fixed on the rotating rod 18 for introducing external air into the heat insulation box 12.

[0027] In this embodiment, when the heat preservation mechanism needs to supply air, the rotating rod 18 drives the fan blade 19 to rotate under the action of external driving force. The fan blade 19 generates airflow suction, which draws external air into the air guide shell 16 through the air inlet on the air guide shell 16. The airflow is then transported to the heat insulation box 12 through the connecting pipe 17, providing a gas source basis for subsequent air heating and air supply to the heat preservation shell 10. The air entering the heat insulation box 12 is heated after contacting the heating tube 15. The heated air is introduced into the air cavity 11 on the heat insulation shell 10 through the conduit 13, and then evenly distributed into the interior of the heat insulation shell 10 through the air outlet on the inner wall of the air cavity 11, forming a constant temperature environment around the lower shell 2, reducing the impact of low temperature on the internal components and moisture of the lower shell 2. The air supply mechanism, through the cooperation of the fan blade 19 and the air guide shell 16, achieves stable air introduction and delivery, providing reliable support for the realization of the heat preservation function. The structural design of the air guide shell 16 makes the airflow introduction path smooth and reduces airflow resistance. At the same time, the air inlet can filter some large particulate impurities. In conjunction with the subsequent filter plate 38, it reduces the probability of dust entering the equipment, which helps to maintain the cleanliness of the heat insulation box 12 and the air chamber 11, and ensures the long-term stable operation of the heat preservation mechanism.

[0028] In a further preferred embodiment of the present invention, the driving mechanism includes: a second motor 21 fixed on the base plate 9; a first spline tube 20 rotatably mounted on the base plate 9 via a bearing seat; first bevel teeth 22 that mesh with each other are fixed on the output shaft of the second motor 21 and the first spline tube 20 for transmitting the driving force of the second motor 21; an electric telescopic rod 43 fixed on the base plate 9, and an assembly plate 23 fixed on the push rod of the electric telescopic rod 43; an assembly frame 24 fixed on the assembly plate 23, and a spline rod 25 rotatably mounted on the assembly frame 24 via a bearing, the bottom end of the spline rod 25 being inserted into the first spline tube 20 for power transmission; and second bevel teeth 26 that mesh with each other are fixed on the spline rod 25 and the rotating rod 18.

[0029] In this embodiment, when air needs to be supplied to the insulation mechanism, the second motor 21 starts, and its output shaft drives the first spline tube 20 to rotate through the meshing first bevel teeth 22. The first spline tube 20 drives the spline rod 25 to rotate synchronously through spline engagement. The spline rod 25 then drives the rotating rod 18 to rotate through the meshing second bevel teeth 26. The rotating rod 18 drives the fan blade 19 to rotate to generate airflow and supply air to the heat insulation box 12.

[0030] When it is necessary to inspect the internal components of the equipment, the electric telescopic rod 43 is activated, and its push rod extends to drive the assembly plate 23 to rise. The assembly plate 23 drives the spline rod 25 to slide upward along the first spline tube 20 through the assembly frame 24, so that the spline rod 25 separates from the second bevel tooth 26 on the rotating rod 18. At the same time, the assembly plate 23 drives the relevant connecting parts and the shell cover 14 to rise synchronously, realizing the separation of the shell cover 14 from the insulation shell 10.

[0031] The drive mechanism, through the second motor 21 and the bevel gear and spline structure, achieves stable power transmission and provides reliable driving force for the operation of the air supply mechanism; the electric telescopic rod 43, in conjunction with the mounting plate 23, can flexibly control the lifting and lowering of the cover 14, and the subsequent rotation operation can facilitate equipment maintenance.

[0032] In a further preferred embodiment of the present invention, an adjustment plate 27 is provided above the assembly plate 23. One end of the adjustment plate 27 is fixedly connected to a detachable cover 14 on the insulation shell 10. A limiting block 42 is fixed at the bottom of the cover 14. A limiting groove 41 is provided on the insulation shell 10 into which the limiting block 42 can be inserted for positioning.

[0033] In this embodiment, when installing the cover 14, the limiting block 42 at the bottom of the cover 14 is aligned with the limiting groove 41 on the insulation shell 10, and the limiting block 42 is inserted into the limiting groove 41 to complete the initial positioning of the cover 14 and the insulation shell 10, so that the cover 14 can accurately cover the top opening of the insulation shell 10, which provides convenience for subsequent fixing operations. When the shell cover 14 needs to be opened for maintenance, the drive mechanism drives the assembly plate 23 to rise. The assembly plate 23 drives the adjustment plate 27 to rise synchronously through the relevant connection structure. The adjustment plate 27 pulls the shell cover 14 upward, so that the limit block 42 is dislodged from the limit groove 41, thereby realizing the separation of the shell cover 14 from the insulation shell 10. Subsequently, the shell cover 14 can be moved by rotating the adjustment plate 27 to avoid the maintenance passage.

[0034] In a further preferred embodiment of the present invention, the assembly plate 23 is provided with an assembly shell 28, and a second spline tube 29 is rotatably installed in the assembly shell 28 via a bearing. The top end of the second spline tube 29 is fixedly connected to the adjusting plate 27, and the spline rod 25 can be inserted into the second spline tube 29 to drive the adjusting plate 27 to rotate.

[0035] In this embodiment, after the shell cover 14 separates from the heat insulation shell 10 and rises to the set height, the spline rod 25 rises with the assembly plate 23 and inserts into the second spline tube 29 to form a spline fit. At this time, the power output by the second motor 21 is transmitted to the spline rod 25 through the first bevel tooth 22 and the first spline tube 20, and the spline rod 25 drives the second spline tube 29 to rotate.

[0036] The top end of the second spline tube 29 is fixedly connected to the adjusting plate 27. Its rotation will directly drive the adjusting plate 27 to rotate synchronously. The adjusting plate 27 will then pull the shell cover 14 to rotate around the axis of the second spline tube 29, moving the shell cover 14 to one side of the heat insulation shell 10, avoiding the maintenance openings of the upper shell 1 and the lower shell 2, making it convenient for personnel to maintain the internal components. This structure achieves flexible switching of power transmission through the detachable connection between the spline rod 25 and the second spline tube 29, ensuring power transmission during heat preservation and gas supply, while also meeting the rotation requirements of the cover 14 during maintenance. The assembly shell 28 provides stable support for the second spline tube 29, and the bearing installation method reduces the frictional resistance when the second spline tube 29 rotates, making the rotation process of the adjustment plate 27 smoother.

[0037] In a further preferred embodiment of the present invention, a sliding rod 30 is symmetrically fixed on the assembly plate 23, and a sleeve block 31 and a spring 32 are sleeved on the sliding rod 30. The sleeve block 31 is fixedly connected to the assembly shell 28, and the two ends of the spring 32 are in contact with the sleeve block 31 and the assembly plate 23 respectively.

[0038] In this embodiment, when it is necessary to inspect the internal components of the lower housing 2, the electric telescopic rod 43 is activated, and its push rod extends to drive the assembly plate 23 to rise. The assembly plate 23 drives the spline rod 25 to slide upward along the first spline tube 20, so that the two second bevel teeth 26 are separated. At the same time, the adjusting plate 27 rises synchronously with the assembly plate 23, driving the shell cover 14 to gradually separate from the heat insulation shell 10. After the shell cover 14 is separated, its gravity is transmitted to the assembly shell 28 through the adjusting plate 27. The assembly shell 28 drives the sleeve block 31 to slide down along the slide rod 30. The sleeve block 31 compresses the spring 32 to make it elastically deformed until the bottom of the assembly shell 28 contacts the upper surface of the assembly plate 23 to achieve support. During this process, the spline rod 25 is simultaneously inserted into the second spline tube 29 to form a transmission engagement. When the cover 14 rises to the set height, the second motor 21 is started. Its output shaft drives the first spline tube 20 to rotate through the first bevel gear 22. The first spline tube 20 drives the spline rod 25 to rotate through spline engagement. The spline rod 25 then drives the second spline tube 29 to rotate, thereby driving the adjusting plate 27 and the cover 14 to rotate, clearing the maintenance passage and making it convenient for personnel to open the upper cover 1 for maintenance operations.

[0039] The maintenance process uses the electric telescopic rod 43 and the second motor 21 to lift and rotate the cover 14, exposing the maintenance area without disassembling the entire equipment, thus reducing the difficulty of operation; the slide rod 30 provides guidance for the sleeve block 31 to ensure the smooth movement of the assembly shell 28, and at the same time assists the assembly shell 28 in quick positioning and support.

[0040] In a further preferred embodiment of the present invention, the bottom of the adjusting plate 27 is symmetrically fixed with support columns 33, the bottom end of the support column 33 is inlaid with a ball bearing 34, and the top of the assembly shell 28 is provided with an annular groove adapted to the ball bearing 34.

[0041] In this embodiment, when the second spline tube 29 drives the adjusting plate 27 to rotate, the support column 33 at the bottom of the adjusting plate 27 rotates synchronously with it. The ball bearing 34 at the bottom of the support column 33 is embedded in the annular groove at the top of the assembly shell 28 and rolls along the annular groove to guide the rotation of the adjusting plate 27.

[0042] The cooperation between the support column 33 and the ball bearing 34 can share part of the weight of the adjustment plate 27 and the cover 14, reduce the radial pressure on the second spline tube 29, prevent the second spline tube 29 from deforming or wearing due to uneven force, and ensure the stability of power transmission.

[0043] In a further preferred embodiment of the present invention, a temperature controller 39 is provided on one side of the heat insulation box 12. The temperature controller 39 is electrically connected to the heating element 15. A protective shell 40 is provided on the outside of the second motor 21. The protective shell 40 is fixedly connected to the base plate 9 to protect the second motor 21.

[0044] In this embodiment, when the insulation mechanism is running, the temperature controller 39 controls the start and stop of the heating tube 15 and the adjustment of the heating power according to the preset temperature range, so that the temperature inside the insulation shell 10 is maintained in a suitable range and moisture is prevented from condensing inside the lower shell 2.

[0045] During the operation of the second motor 21, its outer protective shell 40 forms a shield to prevent dust and debris in the breeding environment from directly contacting the second motor 21, thereby reducing the interference of external factors on the operation of the second motor 21.

[0046] In a further preferred embodiment of the present invention, a square through hole is provided on the lower housing 2, the lever 8 extends through the square through hole to the outside of the lower housing 2, and the upper limit switch 6 and the lower limit switch 7 are both disposed outside the lower housing 2.

[0047] In this embodiment, when the constant pressure water supply device is working, the first motor 5 drives the adjusting screw 3 to rotate, which drives the adjusting nut 4 to move up and down along the adjusting screw 3. The adjusting nut 4 drives the lever 8 to move synchronously. The lever 8 passes through the square through hole on the lower housing 2 and moves outside the housing. When it moves to the corresponding position, it triggers the upper limit switch 6 or the lower limit switch 7 to realize the limit control of pressure regulation. Both the upper limit switch 6 and the lower limit switch 7 are arranged outside the lower housing 2. The signal lines can be neatly arranged along the outer wall of the housing without being hidden inside the cavity, which reduces the bending angle of the signal lines. At the same time, when checking the working status of the limit switches, there is no need to disassemble the lower housing 2; they can be observed directly from the outside. This structural design optimizes the structural integrity of the lower housing 2. The size of the square through hole avoids a significant impact on the housing strength and improves the shear resistance of the lower housing 2 during high-pressure water flushing. The external placement of the limit switch and signal line reduces the wiring difficulty during installation and makes subsequent maintenance operations more convenient, which helps to improve the overall efficiency of equipment installation and maintenance.

[0048] To further improve the performance of this device, in addition to the above-mentioned solutions, this solution also includes the following embodiments: In another embodiment of the present invention, the air supply mechanism includes a filter mechanism for filtering dust and impurities. The filter mechanism includes: a separable mounting shell 37 disposed within the air guide shell 16, wherein a filter plate 38 is provided within the mounting shell 37 for filtering dust and impurities in the air; and a groove block 35 fixed on the mounting shell 37, wherein a connecting plate 36 is fixed within the groove block 35 by bolts, and the top of the connecting plate 36 is fixedly connected to the assembly plate 23.

[0049] In this embodiment, when the air supply mechanism is running, external air enters through the air inlet of the air guide shell 16 and passes through the filter plate 38 inside the mounting shell 37. The filter plate 38 filters the dust and impurities in the air, reducing the amount of dust entering the heat insulation box 12, the air chamber 11 and the heat insulation shell 10, thus providing a clean air source for the stable operation of the heat insulation mechanism. When the filter plate 38 needs to be cleaned or replaced, the electric telescopic rod 43 is activated to drive the assembly plate 23 to rise. The assembly plate 23 drives the connecting plate 36 to rise synchronously. The connecting plate 36 pulls the mounting shell 37 from the air guide shell 16 through the groove block 35, so that the mounting shell 37 is exposed to the outside, which is convenient for personnel to operate. The filtration mechanism achieves air filtration through filter plate 38, which helps maintain the cleanliness of the equipment interior and reduces the impact of dust accumulation on components such as heating element 15 and fan blade 19. The separable design of mounting shell 37 and air guide shell 16, combined with the linkage between connecting plate 36 and assembly plate 23, allows the mounting shell 37 to be removed without additional disassembly of complex structures, simplifying the cleaning and replacement process of filter plate 38 and improving the convenience of equipment maintenance. At the same time, the bolt-fixed connection method facilitates the disassembly and fixing of mounting shell 37.

[0050] In summary, compared with related technologies, by using the upper housing 1 and lower housing 2 in conjunction with the adjusting screw 3, adjusting nut 4 and lever 8 to externally mount the upper limit switch 6 and lower limit switch 7, combined with the optimized square through hole on the lower housing 2, the integrity of the housing structure is ensured while reducing the difficulty of installation and maintenance. Through the linkage of the insulation shell 10, heat insulation box 12, electric heating tube 15 and gas supply mechanism, stable heat preservation of the lower housing 2 is achieved, reducing the impact of low temperature environment on the equipment. With the cooperation of the second motor 21, electric telescopic rod 43 and spline and bevel gear structure in the drive mechanism, the lifting and rotation of the cover 14 is realized. Combined with the separable design of the filter mechanism, the convenience of inspection and maintenance is further improved.

[0051] It is worth noting that this technical solution is closely optimized to address the core pain points of the existing mechanical limit structure of constant pressure water supply devices. The upper limit switch 6, lower limit switch 7 and related signal lines, which were originally located inside the cavity, are moved to the outside of the lower housing 2. Combined with the optimized square through hole on the lower housing 2, this not only avoids the limit module "passing through" the outer shell and damaging the structural strength of the housing, but also solves the problem of insufficient shear resistance of the traditional structure, thereby improving the service life of the equipment in high-pressure water flushing scenarios.

[0052] In terms of functional expansion, this solution integrates auxiliary mechanisms such as heat preservation, drive, and filtration through modular design to form a collaborative working system: the heat preservation mechanism achieves hot air circulation through the cooperation of electric heating tube 15, fan blade 19 and air chamber 11, and combined with the intelligent control of temperature controller 39, it adapts to the usage requirements of low-temperature breeding environment; the detachable mounting shell 37 and filter plate 38 in the filtration mechanism, together with the linkage lifting of the assembly plate 23, can complete the cleaning and replacement of filter plate 38 without additional tools, reducing the impact of dust accumulation inside the equipment on the stability of operation.

[0053] Meanwhile, while maintaining a compact structure, this technical solution achieves flexible switching of power transmission and effective protection of components through a combination of spline connection, bevel gear transmission and elastic buffer structure design. This not only improves installation efficiency but also reduces the complexity of later maintenance operations, fully meeting the multiple requirements of equipment reliability, convenience and adaptability in large-scale livestock and poultry farming scenarios. Furthermore, the connection methods and component selection of each mechanism conform to standardized design principles, facilitating mass production and practical application promotion.

Claims

1. A pressure limiting structure for a constant pressure water supply device used in aquaculture, characterized in that, include: The upper housing and the lower housing are provided with an adjusting screw and an adjusting nut. A first motor is disposed within the lower housing to drive the adjusting nut to move along the adjusting screw; An upper limit switch and a lower limit switch are installed outside the lower housing for limit control; A lever is provided on the adjusting nut, the lever being used to trigger the upper limit switch and the lower limit switch; A base plate is located below the lower housing, and the base plate is equipped with a heat preservation mechanism and a driving mechanism; The drive mechanism includes: a second motor fixed to the base plate; a first spline tube rotatably mounted on the base plate via a bearing seat; both the output shaft of the second motor and the first spline tube are fixed with meshing first bevel teeth for transmitting the driving force of the second motor; an electric telescopic rod fixed to the base plate, with an assembly plate fixed to the push rod of the electric telescopic rod; an assembly frame fixed to the assembly plate, with a spline rod rotatably mounted on the assembly frame via a bearing, the bottom end of the spline rod being inserted into the first spline tube for power transmission; and both the spline rod and the rotating rod are fixed with meshing second bevel teeth. An adjustment plate is provided above the assembly plate. One end of the adjustment plate is fixedly connected to a detachable cover on the insulation shell. A limit block is fixed at the bottom of the cover. A limit groove is provided on the insulation shell for inserting the limit block for positioning. An assembly shell is provided on the assembly plate. A second spline tube is rotatably installed inside the assembly shell via a bearing. The top end of the second spline tube is fixedly connected to the adjustment plate. A spline rod can be inserted into the second spline tube to drive the adjustment plate to rotate. Sliding rods are symmetrically fixed on the assembly plate. A sleeve block and a spring are sleeved on the sliding rod. The sleeve block is fixedly connected to the assembly shell. The two ends of the spring contact the sleeve block and the assembly plate respectively. The lower housing has a square through hole, through which the lever extends to the outside of the lower housing. Both the upper limit switch and the lower limit switch are located outside the lower housing.

2. The pressure limiting structure of the constant pressure water supply device for aquaculture as described in claim 1, characterized in that, The insulation mechanism includes: A heat-insulating shell is disposed on the base plate and can accommodate the lower shell; The heat insulation shell is provided with an air cavity, and the inner wall of the air cavity is provided with several air outlets for guiding hot air into the heat insulation shell. A heat insulation box is disposed on one side of the heat insulation shell, and the heat insulation box is connected to the air cavity through a conduit. The insulated box is equipped with an electric heating element for heating the incoming air.

3. The pressure limiting structure of the constant pressure water supply device for aquaculture as described in claim 2, characterized in that, The insulation mechanism further includes a gas supply mechanism for supplying gas to the insulation box, the gas supply mechanism comprising: An air guide shell that is fixedly connected to the heat insulation box via a connecting pipe; The air guide shell is provided with an air inlet for introducing external air; The rotating rod, mounted inside the air guide housing, is rotated via a bearing. The rotating rod is fixed with fan blades, which are used to guide outside air into the heat insulation box.

4. The pressure limiting structure of the constant pressure water supply device for aquaculture as described in claim 3, characterized in that, The bottom of the adjustment plate is symmetrically fixed with support columns, and the bottom end of the support columns is inlaid with balls. The top of the assembly shell is provided with an annular groove that matches the balls.

5. The pressure limiting structure of the constant pressure water supply device for aquaculture as described in claim 4, characterized in that, A temperature controller is provided on one side of the heat insulation box. The temperature controller is electrically connected to the heating element. A protective shell is provided on the outside of the second motor. The protective shell is fixedly connected to the base plate to protect the second motor.

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