A hydraulic system respirator

Abstract

A kind of hydraulic system respirator, including cylinder, bottom plate is fixedly connected with the lower end of cylinder, top cover is covered with the upper end of cylinder, the center of bottom plate is fixedly connected with air pipe, filter particle is filled in the gap between air pipe and cylinder, a plurality of air holes are opened in bottom plate, sleeve is sleeved with air pipe, sleeve is fixedly connected with swivel, a plurality of discharge holes and air holes are opened in swivel, each discharge hole and each air hole are staggered arrangement, swivel is abutted on bottom plate, each discharge hole and air hole correspond with each air hole, filter hole plate is arranged in air hole.This utility model is used to solve the problem that filter particle is easy to drop into oil tank and pollute oil in oil tank.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic station technology, and its feature is a breather for a hydraulic system. Background Technology

[0002] The hydraulic oil tank breather, also known as the hydraulic oil tank air filter, is a core component of the hydraulic system's oil tank. Its primary function is to filter the air entering and exiting the tank, balance the air pressure inside and outside the tank, prevent impurities from contaminating the oil, and avoid cavitation in the system. When the oil level in the tank drops and air is drawn in, the breather uses its built-in filter element to remove dust, particles, and other impurities from the air, preventing them from entering the tank and contaminating the hydraulic oil, thus protecting precision hydraulic components such as pumps and valves from wear. Because the breather uses filter particles that also filter moisture from the air, it needs to be replaced with new particles periodically. Therefore, the breather must be removed from the top of the tank for particle replacement. If not installed carefully, there is a high chance that silica gel will fall directly into the tank through the interface, directly contaminating the oil inside. Utility Model Content

[0003] The purpose of this invention is to provide a hydraulic system breather to solve the problem that filter particles can easily fall into the oil tank and contaminate the oil inside.

[0004] To solve the above problems, the technical solution of this utility model is as follows: A hydraulic system breather includes a cylinder with a base plate fixedly connected to its lower end and a top cover covering its upper end. A vent pipe is fixedly connected to the center of the base plate, and filter particles are filled in the gap between the vent pipe and the cylinder. Multiple vent holes are provided on the base plate, and a sleeve is fitted over the vent pipe. The sleeve is fixedly connected to a rotating ring. Multiple discharge holes and vent holes are provided on the rotating ring, and the discharge holes and vent holes are arranged alternately. The rotating ring abuts against the base plate, and each discharge hole and vent hole corresponds to each vent hole. A filter plate is provided inside each vent hole.

[0005] Furthermore, a connecting rod is provided inside the vent pipe. The upper end of the connecting rod is fixedly connected to a top plate placed on the vent pipe opening, and the lower end of the connecting rod is fixedly connected to a float. Multiple air passage holes are provided on the top plate.

[0006] Furthermore, a plug is fixedly connected to the connecting rod above the float.

[0007] Furthermore, the plug is shaped like a frustum.

[0008] Furthermore, a guide cone is fitted over the vent pipe, which is located inside the cylinder and abuts against the bottom plate, with each vent hole arranged around the guide cone.

[0009] Furthermore, it also includes a baffle cap that can be fastened to the vent pipe, with a magnet fixedly connected to the baffle cap and a magnetic iron sheet fixedly connected to the top cover. The baffle cap is attracted to the magnetic iron sheet by the magnet.

[0010] Furthermore, the cylinder is made of a transparent material, and the filter particles are color-changing silica gel.

[0011] The beneficial effects of this utility model are as follows: 1. This utility model utilizes a staggered switching structure of "rotating ring-discharge hole-vent hole." Under normal conditions, the filter plate within the vent hole can firmly block air-filtering particles, ensuring stable ventilation and filtration function. When replacing particles, simply rotate the rotating ring to align the discharge hole with the vent hole on the bottom plate, allowing the air-filtering particles to be discharged along a specific path. Furthermore, the discharge channel is completely separated from the vent pipe, preventing particles from entering the oil tank. During the filling process, a magnetic baffle cap quickly seals the vent pipe opening, and the guide cone outside the vent pipe guides particles to evenly fill the gaps, further preventing new particles from accidentally entering the vent pipe. The entire replacement process does not require removing the breather, achieving "particles do not contact the oil tank interface and do not enter the oil," fundamentally solving the contamination risks of traditional replacement methods, effectively ensuring hydraulic oil cleanliness, and extending the service life of core system components.

[0012] 2. For extreme scenarios where the oil level rises abnormally due to a malfunctioning tank level sensor, this invention features a linked sealing structure of "float-connecting rod-plug" to actively block oil overflow paths. When the oil level rises, the float, driven by buoyancy, moves the connecting rod upwards simultaneously, initially sealing the vent pipe opening through the top plate. As the oil level continues to rise, the frustum-shaped plug penetrates deeper into the vent pipe. This frustum structure not only guides the plug to precisely embed into the opening, preventing displacement or jamming during sealing, but also enhances the sealing effect by increasing the contact area with the inner wall of the vent pipe, forming a double seal of "top plate + plug." Compared to traditional breathers without an anti-overflow structure, this design automatically prevents oil from overflowing from the vent pipe, avoiding environmental pollution, equipment corrosion, and hydraulic system pressure imbalance caused by oil leaks, significantly improving the safety and reliability of the system operation. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a three-dimensional structural diagram of the present invention. Figure 2 This is a three-dimensional structural diagram of the present invention. Figure 3 This is a cross-sectional structural diagram of the present invention.

[0014] In the diagram: 1. Magnetic sheet; 2. Top cover; 3. Cylinder; 4. Bottom plate; 5. Vent hole; 6. Discharge hole; 7. Filter plate; 8. Pipe plug; 9. Float; 10. Connecting rod; 11. Vent pipe; 12. Sleeve; 13. Rotary ring; 14. Vent hole; 15. Top plate; 16. Material stop cap; 17. Magnet; 18. Filtered particles; 19. Hydraulic oil tank; 20. Vent hole; 21. Guide cone pipe. Detailed Implementation

[0015] 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.

[0016] like Figures 1 to 3 As shown, a hydraulic system breather includes a cylinder 3, a base plate 4 fixedly connected to the lower end of the cylinder 3, a top cover 2 covering the upper end of the cylinder 3, a vent pipe 11 fixedly connected to the center of the base plate 4, filter particles 18 filling the gap between the vent pipe 11 and the cylinder 3, multiple vent holes 20 opened on the base plate 4, a sleeve 12 covering the vent pipe 11, the sleeve 12 being fixedly connected to a rotating ring 13, multiple discharge holes 6 and vent holes 5 opened on the rotating ring 13, the discharge holes 6 and vent holes 5 being arranged alternately, the rotating ring 13 abutting against the base plate 4, each discharge hole 6 and vent hole 5 corresponding to each vent hole 20, and a filter plate 7 provided in the vent hole 5.

[0017] Under normal conditions, the vent 5 of the rotating ring 13 corresponds to the vent 20 of the bottom plate 4. The filter plate 7 inside the vent 5 effectively blocks the air particles 18 in the gap between the vent pipe 11 and the cylinder 3, preventing the air particles 18 from entering the vent pipe 11 or the oil tank through the vent 20. At this time, outside air enters the oil tank sequentially through the top cover 2, the air particles 18 (filtering moisture and dust), the filter plate 7, the vent 5, the vent 20 of the bottom plate 4, and the vent pipe 11. At the same time, the air inside the oil tank can be discharged in the reverse direction, forming a complete and effective ventilation and filtration channel, realizing the core functions of balancing the air pressure inside and outside the oil tank and purifying the air. When it is necessary to replace the filter particles 18, rotate the rotating ring 13 which is fixedly connected to the sleeve so that the discharge holes 6 arranged alternately on the rotating ring 13 are aligned with the ventilation holes 20 of the bottom plate 4. The filter particles 18 are discharged from the device through the ventilation holes 20 and discharge holes 6 under the action of gravity. When refilling the new filter particles 18, open the top cover 2, seal the opening of the ventilation pipe 11 with the cap, and then pour in the new filter particles 18 to prevent the particles from accidentally entering the ventilation pipe 11. This method allows for the replacement of the filter particles 18 without removing the entire respirator from the oil tank, solving the problem of particles falling into the oil tank and contaminating the oil in traditional removal-type replacements. Under normal conditions, the combination of the filter plate 7 and the vent 5 ensures smooth airflow while effectively blocking the filter particles 18, balancing filtration efficiency and structural stability. During the discharge and feeding processes, the design of switching the rotating ring 13 and sealing the vent pipe 11 provides double protection against particles entering the oil tank, greatly improving the safety and convenience of maintenance operations, while simplifying the maintenance process and increasing work efficiency.

[0018] Furthermore, a connecting rod 10 is provided inside the vent pipe 11. The upper end of the connecting rod 10 is fixedly connected to a top plate 15 placed on the opening of the vent pipe 11. The top plate is larger than the opening of the vent pipe 11. The lower end of the connecting rod 10 is fixedly connected to a float 9. Multiple vent holes 14 are provided on the top plate. The connecting rod 10 inside the vent pipe 11 fixes the top plate and the float 9. The top plate is placed on the opening of the vent pipe 11 and has multiple vent holes 14. Under normal conditions, the float 9 hangs down under the action of gravity, and the vent holes 14 on the top plate keep the opening of the vent pipe 11 unobstructed, without affecting the normal operation of the venting and filtering channel. When the liquid level in the oil tank rises abnormally, the float 9 floats upward under the buoyancy of the oil, driving the connecting rod 10 and the top plate to rise synchronously until the top plate tightly fits against the opening of the vent pipe 11, forming a blockage and blocking the path of the oil from the vent pipe 11. Automatic protection against oil spillage is achieved, avoiding environmental pollution and equipment damage caused by oil leakage; the vent hole 14 on the top plate is designed to ensure that the ventilation function is not interfered with under normal conditions; the gravity-buoyancy linkage structure of the float 9 realizes the automation of the sealing action without manual intervention, thereby improving the operational safety and reliability of the hydraulic system.

[0019] Furthermore, a rubber plug 8 is fixedly connected to the connecting rod 10 above the float 9. The float 9 is generally made of hard plastic, which is not as effective as rubber in sealing. Therefore, a plug is installed on the connecting rod 10 to improve the sealing effect on the vent pipe 11.

[0020] Furthermore, the plug 8 is shaped like a frustum. When the float 9 moves the plug 8 toward the opening of the vent pipe 11, the frustum-shaped conical structure can act as an automatic guide, allowing the plug 8 to be precisely aligned with the opening of the vent pipe 11 and smoothly embedded. At the same time, the frustum-shaped side forms a tight seal with the inner wall of the vent pipe 11, increasing the sealing contact area.

[0021] Furthermore, a guide cone tube 21 is fitted over the vent pipe 11. The guide cone tube 21 is located inside the cylinder 3 and abuts against the bottom plate 4. The various vent holes 20 are evenly distributed on the lower outer periphery of the guide cone tube 21. When the rotating ring 13 is rotated so that the discharge hole 6 aligns with the vent hole 20, the filter particles 18 between the vent pipe 11 and the cylinder 3 slide down along the conical surface of the guide cone tube 21 under the action of gravity and converge to the surrounding vent holes 20. They are then quickly discharged through the discharge hole 6, preventing the filter particles 18 from accumulating at the bottom of the cylinder 3. This makes the discharge of waste filter particles 18 smoother and more thorough, reducing residue. At the same time, it shortens the discharge time, further improving the efficiency of filter particle 18 replacement and reducing maintenance workload.

[0022] Furthermore, it also includes a baffle cap 16 that can be fastened to the vent pipe 11. A magnet 17 is fixedly connected to the baffle cap 16, and a magnetic iron sheet 1 is fixedly connected to the top cover 2. The baffle cap 16 is attracted to the magnetic iron sheet by the magnet 17. When new filtered air particles 18 are poured in, the baffle cap 16 attached to the top cover 2 is removed and fastened to the opening of the vent pipe 11 to quickly seal the vent pipe 11 and prevent the newly poured filtered air particles 18 from accidentally entering the vent pipe 11. The baffle cap 16 is attracted to the magnetic iron sheet 1 of the top cover 2 by its own fixed magnet 17. When not in use, it can be directly attached to the top cover 2 without additional storage. The problem of new filter particles 18 accidentally entering the vent pipe 11 and contaminating the oil during the injection process has been solved, and the protection of the feeding process has been further improved. The magnetic adsorption design of the magnet 17 makes the material stop cap 16 easy to pick up and can effectively prevent loss, avoiding the problems of easy omission and inconvenient storage of traditional sealing parts, and significantly improving the convenience and continuity of maintenance operations.

[0023] Furthermore, the cylinder is made of a transparent material, and the filter particles 18 are color-changing silica gel, which is blue when not absorbing moisture and turns red when saturated with moisture. The respirator is made of a transparent material, facilitating direct observation of the state of the internal filter particles 18 (color-changing silica gel). The color-changing silica gel has the property of changing color upon absorbing moisture; it is its initial color when not absorbing moisture, and its color changes significantly after reaching saturation. This color change can be directly observed through the transparent shell, allowing for judgment on whether the filter particles 18 need to be replaced. This allows for real-time monitoring of the moisture saturation state of the filter particles 18 without disassembling the respirator, enabling accurate judgment of replacement timing and avoiding the impact of blind disassembly or delayed replacement on filtration efficiency. The combination of the transparent shell and the color-changing silica gel makes monitoring the state of the filter particles 18 more intuitive and convenient, further simplifying the maintenance process and ensuring that the intake filtration of the hydraulic system is always in an effective state.

[0024] The embodiments described in this specification are merely examples of implementations of the inventive concept. The scope of protection of this utility model should not be considered as limited to the specific forms described in the embodiments. The scope of protection of this utility model also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A hydraulic system breather, characterized in that: The device includes a cylinder with a base plate fixedly connected to its lower end and a top cover covering its upper end. A vent pipe is fixedly connected to the center of the base plate, and filter particles are filled in the gap between the vent pipe and the cylinder. Multiple vent holes are provided on the base plate, and a sleeve is fitted over the vent pipe. The sleeve is fixedly connected to a rotating ring. Multiple discharge holes and vent holes are provided on the rotating ring, and the discharge holes and vent holes are arranged alternately. The rotating ring rests against the base plate, and each discharge hole and vent hole corresponds to each vent hole. A filter plate is provided inside the vent holes.

2. A hydraulic system breather according to claim 1, characterized in that: A connecting rod is installed inside the vent pipe. The upper end of the connecting rod is fixedly connected to a top plate placed on the vent pipe opening. The top plate is larger than the vent pipe opening. A float is fixedly connected to the lower end of the connecting rod. Multiple air passage holes are opened on the top plate.

3. A hydraulic system breather according to claim 2, characterized in that: A rubber plug is fixedly connected to the connecting rod above the float.

4. A hydraulic system breather according to claim 3, characterized in that: The plug is shaped like a frustum.

5. A hydraulic system breather according to any one of claims 1 to 4, characterized in that: A guide cone is fitted over the vent pipe. The guide cone is located inside the cylinder and rests against the bottom plate. Various vent holes are arranged around the guide cone.

6. A hydraulic system breather according to any one of claims 1 to 4, characterized in that: It also includes a baffle cap that can be fastened to the vent pipe, a magnet is fixedly connected to the baffle cap, and a magnetic iron sheet is fixedly connected to the top cover. The baffle cap is attracted to the magnetic iron sheet by the magnet.

7. A hydraulic system breather according to any one of claims 1 to 4, characterized in that: The cylinder is made of a transparent material, and the filter particles are color-changing silica gel.

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