Pre-charge air cleaner

Abstract

The utility model belongs to filter technical field, concretely relates to a pre -press air cleaner, the utility model discloses from top to bottom in turn includes the outer cover, base and connecting seat, is set up on the lateral wall of outer cover and has the air hole, and the lower extreme of connecting seat is used for being connected with oil tank, the inside of outer cover is equipped with the air filter core for carrying out the filtration to the air of entering oil tank, be equipped with the air inlet hole on the base, and the air inlet hole is equipped with the air inlet valve assembly that can be on -off this air inlet hole, be equipped with the exhaust pipe on connecting seat, and the exhaust valve assembly that can be on -off this exhaust pipe in the exhaust pipe. The application is through setting up the air inlet valve assembly and exhaust valve assembly, to make can respectively to predetermined air pressure and predetermined exhaust pressure carry out pressure regulation, thereby greatly increased practicality.

Description

Technical Field

[0001] This utility model belongs to the field of filter technology, specifically relating to a pre-compressed air filter. Background Technology

[0002] Air filters are usually installed on the oil tank for two reasons: first, to filter the air entering the oil tank, preventing impurities and dust from entering and ensuring the cleanliness of the oil in the tank; second, because the hydraulic pump draws oil, the pressure inside the oil tank will decrease, and the air filter, which is connected to the atmosphere, can maintain the pressure balance inside the oil tank.

[0003] Currently, the air filters widely used in the industry are mostly bidirectional, meaning that the air inlet and outlet of the air filter are the same channel. This makes it inconvenient to adjust the intake or exhaust pressure separately, resulting in poor practicality. Utility Model Content

[0004] The purpose of this invention is to provide a pre-compression air filter that addresses the problem that existing air filters have the same inlet and outlet, making it inconvenient to adjust the inlet or outlet pressure separately and resulting in poor practicality.

[0005] A pre-compressed air filter includes, from top to bottom, an outer cover, a base, and a connecting seat. The side wall of the outer cover has a vent hole, and the lower end of the connecting seat is used to connect to the oil tank.

[0006] The outer casing is equipped with an air filter element for filtering the air entering the oil tank. The base is provided with an air inlet, and an air inlet valve assembly that can open and close the air inlet is provided at the air inlet.

[0007] The connector is provided with an exhaust pipe, and an exhaust valve assembly capable of switching the exhaust pipe on and off is located inside the exhaust pipe.

[0008] Furthermore, the intake valve assembly is located inside the air filter element, and the intake valve assembly includes a stud, a sealing valve sleeve, a first elastic element, and a second elastic element;

[0009] The base is provided with an annular support member, and the air inlet on the base is located inside the annular support member; the stud is fixed on the base and is located inside the annular support member.

[0010] The sealing valve sleeve is fitted onto the stud, and the sealing valve sleeve can slide along the axial direction of the stud;

[0011] The two ends of the first elastic element abut against the inner wall of the outer cover and the top surface of the sealing valve sleeve, respectively. The two ends of the second elastic element abut against the bottom surface of the sealing valve sleeve and the base, respectively. The predetermined intake pressure of the intake valve assembly can be changed by adjusting the elastic potential energy of the first and second elastic elements.

[0012] The annular support on the base has a connecting hole inside. When in use, if the pressure inside the oil tank is less than the predetermined intake pressure, the sealing valve sleeve opens the connecting hole so that the intake valve assembly is in the open state; if the pressure inside the oil tank is greater than the predetermined intake pressure, the sealing valve sleeve blocks the connecting hole so that the intake valve assembly is in the closed state.

[0013] Furthermore, the stud is located at the center of the base.

[0014] Furthermore, the upper end of the air filter abuts against the inner wall of the outer cover, and the lower end is fixed to the base.

[0015] Furthermore, the exhaust valve assembly includes a spherical plug, a base, and a third elastic element;

[0016] The exhaust pipe includes a first segment pipe and a second segment pipe. The inner diameter of the second segment pipe is adapted to the size of the spherical plug, and an exhaust groove is formed on the inner wall of the second segment pipe. At the junction of the first segment pipe and the second segment pipe, the end of the first segment pipe is adapted to the shape of the spherical plug, and the inner diameter of the first segment pipe is smaller than the radius of the spherical plug. The base is fixed inside the second segment pipe, and a third elastic element abuts between the spherical plug and the base. The predetermined exhaust pressure can be changed by adjusting the potential energy of the third elastic element.

[0017] When in use, when the pressure in the oil tank is less than the predetermined exhaust pressure, the spherical plug seals the inner diameter of the first section of the pipe, and the exhaust valve assembly is in the closed state; when the pressure in the oil tank is greater than the predetermined exhaust pressure, the third elastic element is compressed to make the spherical plug a certain distance away from the inner diameter of the first section of the pipe, and the exhaust valve assembly is in the open state.

[0018] Furthermore, the base and the connecting seat are fixed together by a threaded connection.

[0019] Furthermore, a sealing ring is provided between the base and the connecting seat.

[0020] Furthermore, the connecting seat is connected to the oil tank by screws.

[0021] Furthermore, the outer cover and the base are fixed together by a threaded connection.

[0022] Furthermore, the outer cover is snapped onto the base using a snap-fit ​​mechanism.

[0023] The beneficial effects of this utility model are as follows:

[0024] This application improves the practicality of the device by providing an intake valve assembly and an exhaust valve assembly, which enable pressure regulation of predetermined intake pressure and predetermined exhaust pressure respectively.

[0025] During use, by adjusting the predetermined inlet and outlet pressures, the inlet valve assembly is open and the outlet valve assembly is closed when the pressure in the tank is lower than the predetermined inlet pressure. This improves the pump's self-priming capability, maintains the stability of the liquid in the tank, and prevents pump cavitation or other malfunctions caused by oscillations or disturbances in the tank. When the pressure in the tank exceeds the predetermined outlet pressure, the outlet valve assembly automatically opens to release air until the pressure in the tank equals the predetermined outlet pressure, at which point the outlet valve assembly automatically closes. This cycle protects the hydraulic system and extends the working cycle and service life of the oil and components. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this embodiment.

[0027] Figure 2 This is a schematic diagram of the enlarged structure of part A.

[0028] Figure 3 This is a schematic diagram of the exhaust valve assembly.

[0029] Figure label:

[0030] 1-Outer cover, 11-Ventilation hole, 2-Base, 21-Air inlet, 22-Annular support, 23-Connecting hole, 3-Connecting seat, 31-Exhaust pipe, 311-First section pipe, 312-Second section pipe, 313-Exhaust groove, 4-Air filter element, 5-Intake valve assembly, 51-Stud, 52-Sealing valve sleeve, 53-First elastic element, 54-Second elastic element, 6-Exhaust valve assembly, 61-Spherical plug, 62-Base, 63-Third elastic element, 7-Sealing ring. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0032] To address the problem that existing air filters have the same inlet and outlet, making it inconvenient to adjust the inlet or outlet pressure separately and resulting in poor practicality, this embodiment provides a pre-compression air filter.

[0033] like Figures 1 to 3 As shown, the pre-compressed air filter provided in this embodiment includes an outer cover 1, a base 2, and a connecting seat 3.

[0034] The upper end of the base 2 is fixedly connected to the outer cover 1, and the lower end of the base 2 is fixedly connected to the upper end of the connecting seat 3. The lower end of the connecting seat 3 is used to connect to the oil tank.

[0035] Preferably, the connecting seat 3 can be connected to the oil tank by screws.

[0036] Preferably, the outer cover 1 and the base 2 can be fixed by a threaded connection, or the outer cover 1 can be directly snapped onto the base 2 by a snap-fit.

[0037] In this embodiment, the base 2 and the connecting seat 3 are preferably fixed by a threaded connection. Furthermore, to ensure the sealing performance between the base 2 and the connecting seat 3, a sealing ring 7 can be provided between the base 2 and the connecting seat 3.

[0038] In this embodiment, the outer cover 1 has a ventilation hole 11 on its side wall, and the outer cover 1 has an air filter 4 inside.

[0039] Specifically, the upper end of the air filter element 4 can abut against the inner wall of the outer cover 1, and the lower end of the air filter element 4 can be fixed to the base 2. By providing a vent hole 11 on the outer cover 1, air can easily enter the interior of the outer cover 1, thereby facilitating the filtration of the air entering the oil tank by the air filter element 4 inside the outer cover 1, so as to minimize the contamination of the oil by impurities in the air.

[0040] In this embodiment, the base 2 is provided with an air inlet 21, and an air inlet valve assembly 5 is provided at the air inlet 21 that can open and close the air inlet 21.

[0041] In this embodiment, the intake valve assembly 5 is located inside the air filter element 4. The intake valve assembly 5 includes a stud 51, a sealing valve sleeve 52, a first elastic element 53, and a second elastic element 54. An annular support 22 is provided on the base 2, and the air intake hole 21 on the base 2 is located inside the annular support 22. The stud 51 in the intake valve assembly 5 is fixed to the base 2 and located inside the annular support 22. Preferably, the stud 51 can be positioned at the center of the base 2. The sealing valve sleeve 52 in the intake valve assembly 5 is fitted onto the stud 51, and the sealing valve sleeve 52 can slide along the axial direction of the stud 51. In the intake valve assembly 5, the two ends of the first elastic element 53 abut against the inner wall of the outer cover 1 and the upper top surface of the sealing valve sleeve 52, respectively. The two ends of the second elastic element 54 abut against the lower bottom surface of the sealing valve sleeve 52 and the base 2, respectively. By adjusting the elastic potential energy of the first elastic element 53 and the second elastic element 54, the predetermined intake pressure of the intake valve assembly 5 can be changed. The annular support member 22 on the base 2 has a connecting hole 23 inside. During use, when the pressure inside the oil tank is less than the predetermined intake pressure, the sealing valve sleeve 52 opens the connecting hole 23 to make the intake valve assembly open; when the pressure inside the oil tank is greater than the predetermined intake pressure, the sealing valve sleeve 52 blocks the connecting hole 23 to make the intake valve assembly closed.

[0042] In this embodiment, the connecting seat 3 is provided with an exhaust pipe 31, and an exhaust valve assembly 6 that can switch the exhaust pipe 31 on and off is provided inside the exhaust pipe 31.

[0043] The exhaust valve assembly 6 in this embodiment includes a spherical plug 61, a base 62, and a third elastic element 63. The exhaust pipe 31 in this embodiment includes a first segment pipe 311 and a second segment pipe 312. The inner diameter of the second segment pipe 312 is adapted to the size of the spherical plug 61, and an exhaust groove 313 is formed on the inner wall of the second segment pipe 312. At the junction of the first segment pipe 311 and the second segment pipe 312, the end of the first segment pipe 311 is adapted to the shape of the spherical plug 61, and the inner diameter of the first segment pipe 311 is smaller than the radius of the spherical plug 61. The base 62 in the exhaust valve assembly 6 is fixed inside the second segment pipe 312, and the third elastic element 63 abuts between the spherical plug 61 and the base 62. In this embodiment, the predetermined exhaust pressure can be changed by adjusting the potential energy of the third elastic element 63.

[0044] When in use, when the pressure in the oil tank is less than the predetermined exhaust pressure, the spherical plug 61 blocks the inner diameter of the first section pipe 311, and the exhaust valve assembly 6 is in the closed state; when the pressure in the oil tank is greater than the predetermined exhaust pressure, the third elastic element 63 is compressed to make the spherical plug 61 a certain distance away from the inner diameter of the first section pipe 311, and the exhaust valve assembly 6 is in the open state.

[0045] This embodiment, through the structural design of the intake valve assembly 5 and the exhaust valve assembly 6, can independently regulate the predetermined intake pressure and the predetermined exhaust pressure, thereby increasing the practicality of the device.

[0046] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pre-compressed air filter, characterized in that: From top to bottom, it includes an outer cover, a base, and a connecting seat. The side wall of the outer cover has ventilation holes, and the lower end of the connecting seat is used to connect to the oil tank. The outer casing is equipped with an air filter element for filtering the air entering the oil tank. The base is provided with an air inlet, and an air inlet valve assembly that can open and close the air inlet is provided at the air inlet. The connector is provided with an exhaust pipe, and an exhaust valve assembly capable of switching the exhaust pipe on and off is located inside the exhaust pipe.

2. The pre-compressed air filter according to claim 1, characterized in that: The intake valve assembly is located inside the air filter element, and the intake valve assembly includes a stud, a sealing valve sleeve, a first elastic element, and a second elastic element. The base is provided with an annular support member, and the air inlet on the base is located inside the annular support member; the stud is fixed on the base and is located inside the annular support member. The sealing valve sleeve is fitted onto the stud, and the sealing valve sleeve can slide along the axial direction of the stud. The two ends of the first elastic element abut against the inner wall of the outer cover and the top surface of the sealing valve sleeve, respectively. The two ends of the second elastic element abut against the bottom surface of the sealing valve sleeve and the base, respectively. The predetermined intake pressure of the intake valve assembly can be changed by adjusting the elastic potential energy of the first and second elastic elements. The annular support on the base has a connecting hole inside. When in use, if the pressure inside the oil tank is less than the predetermined intake pressure, the sealing valve sleeve opens the connecting hole so that the intake valve assembly is in the open state; if the pressure inside the oil tank is greater than the predetermined intake pressure, the sealing valve sleeve blocks the connecting hole so that the intake valve assembly is in the closed state.

3. The pre-compressed air filter according to claim 2, characterized in that: The stud is located at the center of the base.

4. The pre-compressed air filter according to any one of claims 1-3, characterized in that: The upper end of the air filter abuts against the inner wall of the outer cover, and the lower end is fixed to the base.

5. The pre-compressed air filter according to claim 1, characterized in that: The exhaust valve assembly includes a spherical plug, a base, and a third elastic element; The exhaust pipe includes a first segment pipe and a second segment pipe. The inner diameter of the second segment pipe is adapted to the size of the spherical plug, and an exhaust groove is formed on the inner wall of the second segment pipe. At the junction of the first segment pipe and the second segment pipe, the end of the first segment pipe is adapted to the shape of the spherical plug, and the inner diameter of the first segment pipe is smaller than the radius of the spherical plug. The base is fixed inside the second segment pipe, and a third elastic element abuts between the spherical plug and the base. The predetermined exhaust pressure can be changed by adjusting the potential energy of the third elastic element. When in use, when the pressure in the oil tank is less than the predetermined exhaust pressure, the spherical plug seals the inner diameter of the first section of the pipe, and the exhaust valve assembly is in the closed state; when the pressure in the oil tank is greater than the predetermined exhaust pressure, the third elastic element is compressed to make the spherical plug a certain distance away from the inner diameter of the first section of the pipe, and the exhaust valve assembly is in the open state.

6. The pre-compressed air filter according to any one of claims 1, 2, 3 or 5, characterized in that: The base and the connecting seat are fixed together by a threaded connection.

7. The pre-compressed air filter according to claim 6, characterized in that: A sealing ring is provided between the base and the connecting seat.

8. The pre-compressed air filter according to claim 1, characterized in that: The connector is connected to the oil tank by screws.

9. The pre-compressed air filter according to claim 1, characterized in that: The outer cover is fixed to the base by a threaded connection.

10. The pre-compressed air filter according to claim 1, characterized in that: The outer cover is snapped onto the base using a snap-fit ​​mechanism.

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