High-precision high-pressure double-cylinder filter

Abstract

The utility model discloses a high-precision high-pressure double-cylinder filter, which relates to the technical field of filters and comprises two cylinder bodies I which are parallel to each other and are vertically arranged, and the top ends of the sides, close to each other, of the two cylinder bodies I are connected with the same three-way pipe; the bottom ends of the sides, close to each other, of the two first barrels are connected with three-way pipes of the same structure, the two three-way pipes face different directions, the two ends of each first barrel are fixedly connected with a box, each box is of a hollow structure, and a driving mechanism is arranged in each box. According to the utility model, the transmission mechanism is driven by the driving mechanism so as to drive the filtering mechanism, and the filter cartridge I and the filter cartridge II which coaxially rotate reversely are adopted, so that the filtering area is increased, and meanwhile, viscous fluid to be filtered can be accelerated to pass through the filter element under the action of centrifugal force generated by rotation, so that the filtering efficiency is further improved; and the rotating filter element can effectively reduce blockage, the service life of the filter element is prolonged, and the replacement frequency and cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically a high-precision, high-pressure dual-cylinder filter. Background Technology

[0002] A high-precision, high-pressure dual-cylinder filter is a device used for liquid filtration. It is designed to meet the high-precision filtration requirements of high-pressure operating environments. These filters are commonly used in hydraulic systems, lubrication systems, or other industrial applications requiring high-precision filtration. For example, in the petroleum industry, they remove impurities from crude oil to improve oil quality; in the chemical industry, they purify various chemical raw materials and reaction products to ensure smooth production processes; in the power industry, they treat cooling water and boiler feedwater to prevent equipment corrosion and scaling; and in the pharmaceutical industry, they ensure sterility and purity during drug production.

[0003] Although high-precision, high-pressure dual-cylinder filters play an important role in many industrial fields, existing filters still have some shortcomings. Since most filters only use a single filter element, low filtration efficiency is a major problem. During filtration, the filtered fluid naturally deposits inside the filter element, reducing the effective filtration area and further affecting filtration efficiency. This not only reduces the overall efficiency of the production line but also increases maintenance costs and time. In addition, filter element clogging can cause the internal pressure of the filter to rise, placing an extra burden on the equipment and potentially causing safety hazards.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this invention is to provide a high-precision, high-pressure dual-cylinder filter to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides a high-precision high-pressure dual-cylinder filter, comprising two parallel and vertically arranged cylinders. The top ends of the two cylinders on their adjacent sides are connected to the same T-pipe, and the bottom ends of the two cylinders on their adjacent sides are connected to the same T-pipe with the same structure. The two T-pipes are oriented differently. Both ends of the cylinders are fixedly connected to a housing, which is a hollow structure. A drive mechanism is provided inside the housing. A transmission mechanism is fixed to one end of the drive mechanism near the inside of the cylinder. The transmission mechanism is coaxial with the cylinder. The end of the transmission mechanism away from the drive mechanism extends into the inside of the cylinder. A filter mechanism is fixed to the end of the transmission mechanism away from the drive mechanism, and the filter mechanism is located inside the cylinder.

[0007] The drive mechanism includes a support block fixedly connected to the inner wall of the bottom of the housing. A motor is fixedly connected to the top of the support block. A bevel gear one is fixedly connected to the output end of the motor. A bevel gear two and a bevel gear three are respectively meshed at the top and bottom of the side of the bevel gear one away from the motor. The bevel gear two, the bevel gear three and the cylinder are coaxially arranged. A cylinder two is fixedly connected to the bottom of the support block. The end of the cylinder two away from the support block extends through the interior of the cylinder one. The cylinder two has a hollow structure and a float ball is provided inside the cylinder two.

[0008] Furthermore, the filtration mechanism inside the cylinder body includes a filter cylinder one and a filter cylinder two arranged coaxially, wherein the cross-sectional radius of the filter cylinder one is larger than the cross-sectional radius of the filter cylinder two and the filter cylinder two is located inside the filter cylinder one. There is a gap between the filter cylinder one and the filter cylinder two. A limiting ring is fixedly connected to the inner arc wall of the cylinder body one. The cross-sectional radius of the inner arc wall of the limiting ring is slightly smaller than the cross-sectional radius of the filter cylinder two. The limiting ring is located closer to the drive mechanism than the filter cylinder two.

[0009] Furthermore, the second bevel gear is positioned further away from the first cylinder than the third bevel gear, and both the second and third bevel gears have storage channels extending through them along their respective axial directions. The transmission mechanism includes a rotating shaft first fixedly connected to the inner arc wall of the second bevel gear. The end of the rotating shaft first that is away from the second bevel gear passes through the third bevel gear, the housing, and the first cylinder in sequence, and is positioned inside the first cylinder. The third bevel gear is sleeved on the outside of the rotating shaft first, and the two are rotatably connected to each other. The second rotating shaft is fixedly connected to the side wall of the third bevel gear that is away from the second bevel gear. The second rotating shaft has a hollow structure along its axial direction, and the first rotating shaft rotates inside the second rotating shaft.

[0010] Furthermore, the ends of the rotating shaft one and the rotating shaft two away from the inner wall of the top of the box are respectively installed through the box and the cylinder one to the inside of the cylinder one. The end of the rotating shaft two away from the bevel gear three is engaged with the sleeve shaft one. The sleeve shaft one is installed on the outside of the rotating shaft one. The end of the outer arc wall of the rotating shaft one away from the bevel gear two is fitted with the sleeve shaft two. The sleeve shaft two and the sleeve shaft one rotate and abut against each other.

[0011] Furthermore, a number of locking blocks are fixedly connected to the side wall of the sleeve shaft one near the rotating shaft two, arranged in a circular array along the axis of the sleeve shaft one. A number of slots are provided on the side wall of the rotating shaft two near the sleeve shaft one, arranged in a circular array along the axis of the rotating shaft two. The number of slots corresponds one-to-one with the number of locking blocks. A number of limiting slide bars are fixed on the inner arc wall of the sleeve shaft two, arranged in a circular array along its axial direction. A number of limiting grooves are provided on the outer arc wall of the end of the rotating shaft one away from the bevel gear two, arranged in a circular array along the axial direction of the rotating shaft one. The length direction of the limiting slide bars and the limiting grooves are parallel to the axial direction of the rotating shaft one.

[0012] Furthermore, a fixing bolt is fixedly connected to the center of the end of the rotating shaft away from the bevel gear 2. A fixing cover is threaded to the outside of the fixing bolt. The fixing cover rotates and abuts against the sleeve shaft 2. Both filter cylinder 1 and filter cylinder 2 rotate coaxially on the outer arc wall of the sleeve shaft 2.

[0013] Furthermore, a plurality of support rods are fixedly connected to the inner arc wall of filter cylinder one, near the end of the drive mechanism, and arranged in a ring array along its axial direction. The support rods are all horizontally arranged and the length direction of the support rods is parallel to the radial direction of the rotating shaft one. A plurality of support rods are fixedly connected to the inner arc wall of filter cylinder two, near the end of the drive mechanism, and are arranged in a ring array along its axial direction. The support rods fixedly connected to filter cylinder two are fixedly connected to the outer arc wall of sleeve shaft two, and the support rods fixedly connected to filter cylinder one are fixedly connected to the outer arc wall of sleeve shaft one. Sleeve shaft one does not contact sleeve shaft two.

[0014] Furthermore, both of the cylinders are connected to a tee pipe via pipes, and each pipe is equipped with a valve. The valves in the two pipes located on the same side of the tee pipe and connected to the same cylinder are connected by the same drive shaft. A horizontally arranged fixed rod is fixedly connected to the outside of the drive shaft. The top of the two fixed rods, away from the drive shaft, is rotatably connected to the same horizontally arranged connecting rod. A handle is fixedly connected to the top of one end of the connecting rod.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The drive mechanism drives the transmission mechanism, which in turn drives the filtration mechanism. The coaxial and reverse-rotating filter cartridges one and two increase the filtration area. At the same time, under the action of centrifugal force generated by rotation, the fluid to be filtered with a viscous texture can pass through the filter cartridge more quickly, which further improves the filtration efficiency. The rotating filter cartridge can effectively reduce the occurrence of clogging, extend the service life of the filter cartridge, and reduce the replacement frequency and cost.

[0017] 2. By pulling the lever, the two fixed rods rotate, which in turn causes the valves on the same side of the three-way pipe to open and close synchronously. This allows the filtration equipment on both sides to work alternately, avoiding downtime for maintenance and improving work efficiency. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the internal structure of one of the cylinders in a high-precision, high-pressure dual-cylinder filter.

[0019] Figure 2 A top view showing the connection relationship between the drive mechanism and the transmission mechanism in a high-precision, high-pressure dual-cylinder filter.

[0020] Figure 3This is a schematic diagram showing the connection relationship between the drive mechanism, transmission mechanism and filtration mechanism in a high-precision, high-pressure dual-cylinder filter.

[0021] Figure 4 This is an enlarged view of the drive mechanism in a high-precision, high-pressure dual-cylinder filter.

[0022] Figure 5 An exploded view of the transmission mechanism in a high-precision, high-pressure dual-cylinder filter;

[0023] Figure 6 This is a schematic diagram of the overall structure of a high-precision, high-pressure dual-cylinder filter.

[0024] In the picture:

[0025] 10. Cylinder body 1; 11. Box body; 12. T-joint; 13. Fixing rod; 14. Connecting rod; 15. Handle;

[0026] 20. Motor; 21. Bevel gear one; 22. Bevel gear two; 23. Bevel gear three; 24. Support block; 25. Cylinder two; 26. Float;

[0027] 30. Filter cartridge one; 31. Filter cartridge two; 32. Support rod; 33. Limiting ring;

[0028] 40. Rotating shaft one; 41. Rotating shaft two; 42. Sleeve shaft one; 43. Sleeve shaft two. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see the appendix Figure 1 To be continued Figure 6The high-precision high-pressure dual-cylinder filter provided by this utility model includes two parallel and vertically arranged cylinders 10. The top of the two cylinders 10 on the side close to each other is connected to the same three-way pipe 12. The bottom of the two cylinders 10 on the side close to each other is connected to the same three-way pipe 12 with the same structure. The two three-way pipes 12 have different orientations. Both ends of the cylinders 10 are fixedly connected to a box 11. The box 11 has a hollow structure. A driving mechanism is provided inside the box 11. A transmission mechanism is fixed at the end of the driving mechanism that is close to the inside of the cylinders 10. The transmission mechanism is coaxial with the cylinders 10. The end of the transmission mechanism that is away from the driving mechanism extends into the inside of the cylinders 10. A filtering mechanism is fixed at the end of the transmission mechanism that is away from the driving mechanism. The filtering mechanism is located inside the cylinders 10.

[0031] The drive mechanism includes a support block 24 fixedly connected to the inner wall of the bottom of the housing 11. A motor 20 is fixedly connected to the top of the support block 24. A bevel gear 21 is fixedly connected to the output end of the motor 20. A bevel gear 22 and a bevel gear 23 are respectively meshed at the top and bottom of the side of the bevel gear 21 away from the motor 20. The bevel gear 22, bevel gear 23 and the cylinder 10 are coaxially arranged. A cylinder 25 is fixedly connected to the bottom of the support block 24. The end of the cylinder 25 away from the support block 24 extends into the interior of the cylinder 10. The cylinder 25 has a hollow structure and a float 26 is provided inside the cylinder 25.

[0032] It should be noted that the position of the three-way pipe 12 near the drive mechanism is set to the top. The three-way pipe 12 located at the top is used as the inlet, and the three-way pipe 12 located at the bottom is used as the outlet. After the liquid to be filtered enters from the three-way pipe 12 at the top, it flows into the filter mechanism inside the cylinder 10 along the pipe.

[0033] The drive mechanism drives the transmission mechanism to rotate, which in turn drives the filter mechanism to rotate inside the first cylinder 10, enhancing the filtration effect. The second cylinder 25 and the float 26 are used to adjust the working state according to the change of liquid level inside the cylinder. That is, when the filter mechanism on one side is blocked, the flow rate at this point will inevitably decrease. As the fluid continuously flows in, the pressure inside the first cylinder 10 on that side increases, so the fluid is more likely to flow into the second cylinder 25, thereby causing the float 26 to float.

[0034] Furthermore, a pressure switch is provided at the bottom of the support block 24. The pressure switch is electrically connected to the motor 20. When the float 26 touches the pressure switch, the motor 20 is turned off to reduce energy consumption. Furthermore, an alarm device can be set to remind the operator to switch the flow direction of the fluid and to maintain the filter cartridge 1 30 and filter cartridge 2 31. A retaining ring is provided at the bottom opening of the cartridge 2 25 to prevent the float 26 from falling out and to allow liquid to enter.

[0035] Please see the appendix Figure 1To be continued Figure 6 The present invention provides a technical solution: the filtration mechanism inside the cylinder 10 includes a filter cylinder 30 and a filter cylinder 31 arranged coaxially, wherein the cross-sectional radius of the filter cylinder 30 is larger than the cross-sectional radius of the filter cylinder 31 and the filter cylinder 31 is located inside the filter cylinder 30, and there is a gap between the filter cylinder 30 and the filter cylinder 31. A limiting ring 33 is fixedly connected to the inner arc wall of the cylinder 10. The cross-sectional radius of the inner arc wall of the limiting ring 33 is slightly smaller than the cross-sectional radius of the filter cylinder 31, and the limiting ring 33 is set closer to the drive mechanism than the filter cylinder 31.

[0036] It should be noted that when the fluid flows into the first cylinder 10 through the pipe, the limiting ring 33 will initially limit the flow of the fluid, so that the fluid first contacts the second filter cylinder 31. The cross-sectional radius of the filter holes on the side wall of the second filter cylinder 31 is smaller than that of the filter holes on the side wall of the first filter cylinder 30. When the fluid flows into the second filter cylinder 31, larger impurities and particles are filtered out. The fluid after the initial filtration by the second filter cylinder 31 continues to flow to the first filter cylinder 30, where even smaller impurities and particles are further filtered out.

[0037] Please see the appendix Figure 1 To be continued Figure 6 The present invention provides a technical solution: the second bevel gear 22 is located further away from the first cylinder 10 than the third bevel gear 23, and the second bevel gear 22 and the third bevel gear 23 are respectively provided with a storage channel along their respective axial directions. The transmission mechanism includes a rotating shaft 40 fixedly connected to the inner arc wall of the second bevel gear 22. The end of the rotating shaft 40 away from the second bevel gear 22 passes through the third bevel gear 23, the box 11, and the first cylinder 10 in sequence and is disposed inside the first cylinder 10. The third bevel gear 23 is sleeved on the outside of the rotating shaft 40 and the two are rotatably connected to each other. The side wall of the third bevel gear 23 away from the second bevel gear 22 is coaxially fixedly connected to the second rotating shaft 41. The second rotating shaft 41 is hollow along its axial direction, and the first rotating shaft 40 rotates inside the second rotating shaft 41.

[0038] The ends of the rotating shaft 40 and the rotating shaft 41 away from the top inner wall of the housing 11 are respectively inserted through the housing 11 and the cylinder 10 to the inside of the cylinder 10. The end of the rotating shaft 41 away from the bevel gear 23 is engaged with the sleeve shaft 42. The sleeve shaft 42 is sleeved on the outside of the rotating shaft 40. The end of the outer arc wall of the rotating shaft 40 away from the bevel gear 22 is sleeved with the sleeve shaft 43. The sleeve shaft 43 and the sleeve shaft 42 rotate and abut against each other.

[0039] It should be noted that: the rotation of bevel gear 22 drives the rotation of shaft 1 40, while bevel gear 3 23 does not rotate with shaft 1 40. Bevel gear 3 23 drives shaft 2 41 to rotate. Under the meshing of bevel gear 1 21, bevel gear 22 and bevel gear 3 23 form a coaxial and reverse rotation. Shaft 1 40 passes through the storage channels of bevel gear 22 and bevel gear 3 23 in sequence.

[0040] During installation, first, sleeve 42 is fitted onto rotating shaft 40 and slid along the axis of rotating shaft 40 until it abuts against rotating shaft 41. Then, sleeve 43 is fitted onto rotating shaft 40 and slid along the axis of rotating shaft 40 until it abuts against sleeve 42.

[0041] Please see the appendix Figure 1 To be continued Figure 6 This utility model provides a technical solution: a plurality of locking blocks are fixedly connected to the side wall of the first sleeve shaft 42 near the second rotating shaft 41, arranged in a circular array along the axis of the first sleeve shaft 42; a plurality of slots are provided on the side wall of the second rotating shaft 41 near the first sleeve shaft 42, arranged in a circular array along the axis of the second rotating shaft 41, with each slot corresponding to a locking block; a plurality of limiting slide bars are fixed on the inner arc wall of the second sleeve shaft 43, arranged in a circular array along its axial direction; a plurality of limiting grooves are provided on the outer arc wall of the first rotating shaft 40 away from the second bevel gear 22, arranged in a circular array along the axial direction of the first rotating shaft 40; the length directions of the limiting slide bars and the limiting grooves are parallel to the axial direction of the first rotating shaft 40.

[0042] It should be noted that the length direction of the locking block is parallel to the axis of the sleeve shaft 42. The locking block and the slot facilitate the installation and disassembly of the rotating shaft 41 and the sleeve shaft 42. At the same time, the split structure reduces the overall weight and reduces the difficulty of initial installation and later maintenance and replacement.

[0043] The limiting slide bar on the inner arc wall of sleeve shaft 2 43 corresponds one-to-one with the limiting slide groove on the outer arc wall of rotating shaft 1 40, and the limiting slide bar slides in the limiting slide groove. This facilitates installation and disassembly, and also facilitates torque transmission between rotating shaft 1 40 and sleeve shaft 2 43.

[0044] Please see the appendix Figure 1 To be continued Figure 6 The present invention provides a technical solution: a fixing bolt is fixedly connected to the center of the end of the rotating shaft 40 away from the bevel gear 22, and a fixing cover is threaded on the outside of the fixing bolt. The fixing cover and the sleeve shaft 43 rotate and abut against each other. The filter cylinder 30 and the filter cylinder 31 both rotate coaxially on the outer arc wall of the sleeve shaft 43.

[0045] It should be noted that the fixing cover and fixing bolts are used to support the entire transmission mechanism and prevent the first sleeve 42 and the second sleeve 43 from falling off.

[0046] Please see the appendix Figure 1 To be continued Figure 6This utility model provides a technical solution: a plurality of support rods 32 are fixedly connected to the inner arc wall of the filter cylinder 30 near the drive mechanism at one end. The support rods 32 are arranged in a ring array along their axial direction. The length direction of the support rods 32 is parallel to the radial direction of the rotating shaft 40. A plurality of support rods 32 are fixedly connected to the inner arc wall of the filter cylinder 31 near the drive mechanism at one end. The support rods 32 fixedly connected to the filter cylinder 31 are fixedly connected to the outer arc wall of the sleeve shaft 43. The support rods 32 fixedly connected to the filter cylinder 30 are fixedly connected to the outer arc wall of the sleeve shaft 42. The sleeve shaft 42 does not contact the sleeve shaft 43.

[0047] It should be noted that: the first sleeve shaft 42 drives the first filter cylinder 30 to rotate through the support rod 32, and the second sleeve shaft 43 drives the second filter cylinder 31 to rotate through the support rod 32. The support rods 32 fixed on the first filter cylinder 30 and the second filter cylinder 31 are not located in the same horizontal plane.

[0048] Please see the appendix Figure 1 To be continued Figure 6 This utility model provides a technical solution: both of the cylinders 10 are connected to the tee pipe 12 through pipes, and each pipe is equipped with a valve. The valves in the two pipes located on the same side of the tee pipe 12 and connected to the same cylinder 10 are connected through the same drive shaft. A horizontally arranged fixed rod 13 is fixedly connected to the outside of the drive shaft. The top of the two fixed rods 13, which are respectively away from the drive shaft, is rotatably connected to the same horizontally arranged connecting rod 14. A handle 15 is fixedly connected to the top of one end of the connecting rod 14.

[0049] It should be noted that: since the initial deflection angles of the two fixed rods 13 relative to the transmission shaft are the same, when the handle 15 is pulled, the two fixed rods 13 rotate synchronously under the action of the connecting rod 14, thereby changing the working state of the valve in the pipeline.

[0050] Furthermore, the valves located on both sides of the three-way pipe 12 have opposite initial states, and the valves installed in the two pipes on the same cylinder 10 have the same working state, so that the opening and closing of the inlet and outlet of the same cylinder 10 can be controlled synchronously.

[0051] Working principle:

[0052] The liquid to be filtered enters from the upper three-way pipe 12, which serves as the inlet. The fluid then flows into the inner cylinder 10 along the pipe. Inside the inner cylinder 10, the fluid first encounters the limiting ring 33, which restricts the fluid and allows it to enter the filter cartridge 31. At this point, larger impurities and particles in the fluid are initially filtered out.

[0053] When motor 20 starts, its output drives bevel gear 21 to rotate. Bevel gear 21 meshes with bevel gear 22 and bevel gear 23. Since they are coaxially arranged, bevel gear 22 and bevel gear 23 rotate in opposite directions. The rotation of bevel gear 22 drives shaft 40 to rotate, and bevel gear 23 drives shaft 41 to rotate. The rotation of shaft 40 and shaft 41 is transmitted to filter cartridge 30 and filter cartridge 31 through sleeve shaft 42 and sleeve shaft 43, respectively, so that they rotate inside cylinder 10. This rotational motion enhances the filtration effect because the rotating filter cartridge can better disperse the fluid and increase the contact opportunity between the fluid and the filter pores.

[0054] When the filter mechanism on one side becomes clogged, the flow rate on that side decreases and the pressure inside the first cylinder 10 increases. At this time, the fluid is more likely to rush into the second cylinder 25, causing the float 26 to float. The rise of the float 26 touches the pressure switch, which is electrically connected to the motor 20. Therefore, the motor 20 is turned off to reduce energy consumption.

[0055] When the handle 15 is pulled, the connecting rod 14 causes the two fixed rods 13 to rotate synchronously, thereby synchronously controlling the opening and closing of the inlet and outlet of the same cylinder 10, thus adjusting the flow direction of the fluid.

Claims

1. A high-precision, high-pressure dual-cylinder filter, comprising two parallel and vertically arranged cylindrical bodies (10), the top ends of the two cylindrical bodies (10) on their adjacent sides are connected to the same three-way pipe (12), the bottom ends of the two cylindrical bodies (10) on their adjacent sides are connected to the same three-way pipe (12) with the same structure, the two three-way pipes (12) having different orientations, and a housing (11) fixedly connected to both ends of the cylindrical bodies (10), the housing (11) having a hollow structure, characterized in that: The housing (11) is provided with a drive mechanism. A transmission mechanism is fixed at one end of the drive mechanism that is close to the inside of the cylinder (10). The transmission mechanism is coaxially arranged with the cylinder (10). The end of the transmission mechanism that is away from the drive mechanism extends into the inside of the cylinder (10). A filter mechanism is fixed at the end of the transmission mechanism that is away from the drive mechanism. The filter mechanism is located inside the cylinder (10). The drive mechanism includes a support block (24) fixedly connected to the inner wall of the bottom of the housing (11). A motor (20) is fixedly connected to the top of the support block (24). A bevel gear (21) is fixedly connected to the output end of the motor (20). A bevel gear (22) and a bevel gear (23) are respectively meshed at the top and bottom of the side of the bevel gear (21) away from the motor (20). The bevel gear (22), bevel gear (23) and the cylinder (10) are coaxially arranged. A cylinder (25) is fixedly connected to the bottom of the support block (24). The end of the cylinder (25) away from the support block (24) extends into the interior of the cylinder (10). The cylinder (25) is hollow and a float (26) is provided inside the cylinder (25).

2. The high-precision, high-pressure dual-cylinder filter as described in claim 1, characterized in that: The filtration mechanism inside the cylinder (10) includes a filter cylinder (30) and a filter cylinder (31) arranged coaxially. The cross-sectional radius of the filter cylinder (30) is greater than that of the filter cylinder (31), and the filter cylinder (31) is located inside the filter cylinder (30). There is a gap between the filter cylinder (30) and the filter cylinder (31). A limiting ring (33) is fixedly connected to the inner arc wall of the cylinder (10). The cross-sectional radius of the inner arc wall of the limiting ring (33) is slightly smaller than that of the filter cylinder (31). The limiting ring (33) is located closer to the drive mechanism than the filter cylinder (31).

3. The high-precision, high-pressure dual-cylinder filter as described in claim 1, characterized in that: The second bevel gear (22) is located further away from the first cylinder (10) than the third bevel gear (23). The second bevel gear (22) and the third bevel gear (23) are respectively provided with a storage channel along their respective axes. The transmission mechanism includes a rotating shaft (40) fixedly connected to the inner arc wall of the second bevel gear (22). The end of the rotating shaft (40) away from the second bevel gear (22) passes through the third bevel gear (23), the box (11), and the first cylinder (10) in sequence and is set inside the first cylinder (10). The third bevel gear (23) is sleeved on the outside of the rotating shaft (40) and the two are rotatably connected to each other. The side wall of the third bevel gear (23) away from the second bevel gear (22) is fixedly connected to the second rotating shaft (41) coaxially. The second rotating shaft (41) is hollow along its axis. The first rotating shaft (40) rotates inside the second rotating shaft (41).

4. The high-precision, high-pressure dual-cylinder filter as described in claim 3, characterized in that: The ends of the first rotating shaft (40) and the second rotating shaft (41) away from the top inner wall of the box (11) are respectively inserted through the box (11) and the first cylinder (10) to the inside of the first cylinder (10). The end of the second rotating shaft (41) away from the third bevel gear (23) is engaged with the first sleeve shaft (42). The first sleeve shaft (42) is sleeved on the outside of the first rotating shaft (40). The end of the outer arc wall of the first rotating shaft (40) away from the second bevel gear (22) is sleeved with the second sleeve shaft (43). The second sleeve shaft (43) and the first sleeve shaft (42) rotate and abut against each other.

5. The high-precision, high-pressure dual-cylinder filter as described in claim 4, characterized in that: On the side wall of the sleeve shaft one (42) near the rotating shaft two (41), a number of locking blocks are fixedly connected in a ring array along the axis of the sleeve shaft one (42). On the side wall of the rotating shaft two (41) near the sleeve shaft one (42), a number of slots are provided in a ring array along the axis of the rotating shaft two (41). The number of slots corresponds one-to-one with the number of locking blocks. On the inner arc wall of the sleeve shaft two (43), a number of limiting slides are fixed in a ring array along its axial direction. On the outer arc wall of the end of the rotating shaft one (40) away from the bevel gear two (22), a number of limiting grooves are provided in a ring array along the axial direction of the rotating shaft one (40). The length direction of the limiting slides and the limiting grooves are parallel to the axial direction of the rotating shaft one (40).

6. The high-precision, high-pressure dual-cylinder filter as described in claim 4, characterized in that: A fixing bolt is fixedly connected to the center of the end of the rotating shaft one (40) away from the bevel gear two (22). A fixing cover is threaded on the outside of the fixing bolt. The fixing cover rotates and abuts against the sleeve shaft two (43). The filter cylinder one (30) and the filter cylinder two (31) rotate coaxially on the outer arc wall of the sleeve shaft two (43).

7. The high-precision, high-pressure dual-cylinder filter as described in claim 6, characterized in that: Several support rods (32) are fixedly connected to the inner arc wall of filter cylinder one (30) near the end of the drive mechanism. They are arranged in a ring array along the axial direction. The support rods (32) are all horizontally arranged and the length direction of the support rods (32) is parallel to the radial direction of the rotating shaft one (40). Several support rods (32) are fixedly connected to the inner arc wall of filter cylinder two (31) near the end of the drive mechanism. They are arranged in a ring array along the axial direction. The support rods (32) fixedly connected to filter cylinder two (31) are fixedly connected to the outer arc wall of sleeve shaft two (43). The support rods (32) fixedly connected to filter cylinder one (30) are fixedly connected to the outer arc wall of sleeve shaft one (42). Sleeve shaft one (42) does not contact sleeve shaft two (43).

8. The high-precision, high-pressure dual-cylinder filter as described in claim 1, characterized in that: Both of the cylinders (10) are connected to the tee pipe (12) through pipes. Each pipe is equipped with a valve. The valves in the two pipes located on the same side of the tee pipe (12) and connected to the same cylinder (10) are connected through the same drive shaft. A horizontally arranged fixed rod (13) is fixedly connected to the outside of the drive shaft. The top of the two fixed rods (13) away from the drive shaft is rotatably connected to the same horizontally arranged connecting rod (14). A handle (15) is fixedly connected to the top of one end of the connecting rod (14).

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