Exhaust and oil mist removal device for filter

Abstract

The utility model relates to the field of hydraulic systems, in particular to an exhaust and oil mist removal device for a filter, which comprises an automatic exhaust valve and an oil mist filtering device which are sequentially arranged and communicated from bottom to top, and a connecting piece for connecting the automatic exhaust valve and the oil mist filtering device is arranged between the automatic exhaust valve and the oil mist filtering device; the automatic exhaust valve is mounted on a filter of the hydraulic system; the oil mist filter device comprises a filter shell, a filter element mounted in the filter shell, a filter air inlet pipe fixedly connected and communicated with the filter shell, and a filter air outlet pipe fixedly connected and communicated with the filter shell; one end of the filtering air inlet pipe is mounted on the automatic exhaust valve through a connecting piece, the other end of the filtering air inlet pipe extends into the filter element, and oil mist introduced into the filter shell from the filtering air inlet pipe is filtered by the filter element and then discharged by the filtering air outlet pipe. According to the technical scheme, it can be guaranteed that gas in the filter is exhausted, and oil mist carried by the gas can be filtered.

Description

Technical Field

[0001] The present application relates to the field of hydraulic systems, and in particular to an exhaust gas degreasing mist removal device for a filter. Background Art

[0002] A hydraulic system is a system that uses oil as a working medium, utilizes the pressure energy of the oil, and drives the hydraulic actuators through control valves and other components. The quality of hydraulic oil has a great impact on the performance of the hydraulic system. To ensure the normal operation of the oil system, it is often necessary to install a hydraulic oil filter (hereinafter referred to as a filter).

[0003] When the hydraulic system is started, there will be air inside the filter, which makes the filter element unable to be fully used and affects the service life of the filter element. In order to solve this problem, the current method is to install an exhaust device on the filter. Although this method can discharge the oil mist in the filter, it cannot filter the discharged oil mist. The discharged oil mist will pollute the air and is also harmful to the human body. Utility Model Content

[0004] The present application provides an exhaust oil mist removal device for a filter, which can not only ensure the discharge of gas in the filter, but also filter the oil mist carried by the gas.

[0005] An exhaust and oil mist removal device for a filter comprises an automatic exhaust valve and an oil mist filter device which are arranged in sequence from bottom to top and are connected, and a connector for connecting the automatic exhaust valve and the oil mist filter device is provided between the automatic exhaust valve and the oil mist filter device;

[0006] The automatic exhaust valve is installed on the filter of the hydraulic system;

[0007] The oil mist filtering device includes a filter housing, a filter element installed in the filter housing, a filter inlet pipe fixedly connected to and communicated with the filter housing, and a filter outlet pipe fixedly connected to and communicated with the filter housing; one end of the filter inlet pipe is installed on the automatic exhaust valve through a connector, and the other end of the filter inlet pipe extends into the filter element. The oil mist entering the filter housing from the filter inlet pipe is filtered by the filter element and then discharged from the filter outlet pipe.

[0008] Preferably, the filter housing comprises an upper housing and a lower housing detachably connected to the upper housing, the filter air inlet pipe is integrally formed on a side of the lower housing away from the opening and one end extends into the interior of the lower housing, and the filter air outlet pipe is integrally formed on a side of the upper housing away from the opening.

[0009] Preferably, the filter element is in the shape of a cylinder with a hollow interior and openings at both ends; a limiting component for fixing the filter element is provided in the filter housing;

[0010] The limiting component comprises:

[0011] The mounting seat is located in the lower shell body, and a mounting opening is provided on the mounting seat. The mounting seat is sleeved on the pipe body extending from the filter inlet pipe to the inside of the filter shell through the mounting opening, and one end of the filter element stands on the mounting seat;

[0012] A top cover is located in the upper housing and covers the other end of the filter element;

[0013] The spring is in a compressed state, with one end abutting against the inner wall of the upper shell body and the other end abutting against the top cover.

[0014] Preferably, the mounting seat comprises an annular supporting plate, an inner circular plate fixed to the inner circle of the supporting plate, and an outer circular plate fixed to the outer circle of the supporting plate, and a U-shaped groove is formed between the supporting plate, the inner circular plate and the outer circular plate;

[0015] The inner circular plate is sleeved on the pipe body of the filter air inlet pipe extending into the interior of the filter housing through the mounting opening formed by the inner circular plate itself;

[0016] One end of the filter element stands on a supporting plate.

[0017] Preferably, a support plate is fixedly connected to a side of the support plate away from the U-shaped groove, and a sealing ring is installed on a side of the support plate facing the installation opening.

[0018] Preferably, the top cover comprises a pressing plate pressed on an end of the filter element away from the mounting seat, and a limiting ring fixed to the pressing plate, wherein the limiting ring is sleeved on the outside of the filter element.

[0019] Preferably, a side of the pressure plate away from the limiting ring is recessed toward the limiting ring to form a groove, and one end of the spring is located in the groove.

[0020] Preferably, the automatic exhaust valve comprises:

[0021] The valve body is a hollow barrel-shaped structure. A first guide hole and a first air hole are opened on the top of the valve body. The first guide hole is located at the center of the top of the valve body.

[0022] A partition is fixedly connected to the valve body to divide the interior of the valve body into an upper chamber and a lower chamber. A second guide hole and a second air hole are opened on the partition, and the second guide hole is located at the center of the partition;

[0023] The ejector pin comprises a lower cylindrical rod and an upper cylindrical rod which are integrally formed and coaxially arranged, wherein the diameter of the lower cylindrical rod is larger than that of the upper cylindrical rod, the upper cylindrical rod is slidably inserted into the first guide hole, and the lower cylindrical rod is slidably inserted into the second guide hole;

[0024] The valve is hollow inside and open at one end, the open end of the valve is fixed to the inner top wall of the valve body, and the first air hole is covered inside, a valve port is opened on the valve, the upper cylindrical rod passes through the valve port, and the size of the lower cylindrical rod is larger than the valve port;

[0025] A float is located in the upper chamber and fixed to the lower cylindrical rod, with a gap between the float and the valve body;

[0026] Lubricating oil is filled in the valve body and slightly overflows the partition. Under normal conditions, the float rises, causing the end of the lower cylindrical rod to abut against the valve to close the valve port.

[0027] The exhaust valve inlet pipe has one end fixed to the outer wall of the bottom of the valve body and the other end connected to the filter of the hydraulic system. A one-way valve for only gas to pass through is installed on the exhaust valve inlet pipe;

[0028] The exhaust valve air outlet pipe is fixedly connected to the outer wall of the top of the valve body and covers the first air outlet hole inside.

[0029] Preferably, the lower cylindrical rod and the side opposite to the valve port are both processed with chamfers for sealing.

[0030] Preferably, the connecting piece is a clamp or a clamp; and the pipe openings of the filter air inlet pipe and the exhaust valve air outlet pipe are both fixedly connected with a mounting plate for fixing the connecting piece.

[0031] In summary, this application includes the following beneficial technical effects:

[0032] When gas is generated in the filter, the automatic exhaust valve opens, and the gas enters the oil mist filter device through the automatic exhaust valve. After filtration, the gas is directly discharged into the atmosphere, and the oil mist carried in the gas is filtered and collected to prevent air pollution and harm to the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a cross-sectional view of the exhaust oil mist removal device in normal working condition;

[0034] Figure 2 It is a cross-sectional view showing the internal structure of the valve body;

[0035] Figure 3 It is a schematic diagram of the exhaust and oil mist removal structure of the exhaust oil mist removal device;

[0036] Figure 4 It is a schematic diagram of the structure of the mounting seat;

[0037] Figure 5 It is a schematic diagram showing the structure of the top cover.

[0038] Description of reference numerals: 1. automatic exhaust valve; 11. valve body; 111. first guide hole; 112. first air outlet hole; 12. partition plate; 121. second guide hole; 122. second air outlet hole; 13. ejector pin; 131. lower cylindrical rod; 132. upper cylindrical rod; 14. valve; 141. valve port; 15. float; 16. exhaust valve air inlet pipe; 17. exhaust valve air outlet pipe; 18. upper chamber; 19 , lower chamber; 2, oil mist filtering device; 21, filter housing; 211, upper housing; 212, lower housing; 22, filter element; 23, filter inlet pipe; 24, filter outlet pipe; 25, mounting seat; 251, supporting plate; 252, inner circular plate; 253, outer circular plate; 254, supporting plate; 26, top cover; 261, pressure plate; 262, limit ring; 263, groove; 27, spring; 3, connecting parts. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-4 This application is described in further detail.

[0040] The embodiment of the present application discloses an exhaust gas degreasing mist device for a filter. Figure 1 The exhaust and oil mist removal device includes an automatic exhaust valve 1 and an oil mist filter device 2 which are arranged in sequence from bottom to top and are connected. A connector 3 for connecting the automatic exhaust valve 1 and the oil mist filter device 2 is provided between the automatic exhaust valve 1 and the oil mist filter device 2. The automatic exhaust valve 1 is installed on the filter of the hydraulic system. When gas is generated in the filter, the gas is discharged from the automatic exhaust valve 1 to the oil mist filter device 2 and then discharged into the atmosphere after being filtered.

[0041] The automatic exhaust valve 1 comprises a valve body 11 , a partition plate 12 , a ejector pin 13 , a valve 14 , a float 15 , lubricating oil (not shown in the figure), an exhaust valve air inlet pipe 16 and an exhaust valve air outlet pipe 17 .

[0042] Reference Figure 1 and Figure 2 The valve body 11 is a hollow barrel structure, specifically enclosed by a top plate, a side plate, and a bottom plate, and the bottom is funnel-shaped. A first guide hole 111 and a first air hole 112 are provided on the top plate of the valve body 11. The first guide hole 111 is located at the center of the top plate, and a plurality of first air holes 112 are provided around the first guide hole 111.

[0043] The partition 12 is fixedly connected to the valve body 11, dividing the interior of the valve body 11 into an upper chamber 18 and a lower chamber 19. The space of the upper chamber 18 is larger than that of the lower chamber 19. A second guide hole 121 and a second air hole 122 are opened on the partition 12. The second guide hole 121 is located at the center of the partition 12, and a plurality of second air holes 122 are arranged around the second guide hole 121.

[0044] The ejector pin 13 includes a lower cylindrical rod 131 and an upper cylindrical rod 132 which are integrally formed and coaxially arranged. The diameter of the lower cylindrical rod 131 is larger than that of the upper cylindrical rod 132. The upper cylindrical rod 132 is slidably inserted into the first guide hole 111, and the lower cylindrical rod 131 is slidably inserted into the second guide hole 121.

[0045] Reference Figure 1 and Figure 2 The valve 14 is cylindrical, hollow inside and open at one end. The open end of the valve 14 is fixed to the inner top plate of the valve body 11, and covers the first air hole 112 inside. The valve 14 is provided with a valve port 141. The upper cylindrical rod 132 passes through the valve port 141. The size of the lower cylindrical rod 131 is larger than the valve port 141. When the lower cylindrical rod 131 abuts against the valve 14, a seal is formed between the two to close the valve port 141. In order to further improve the sealing performance, the opposite side of the lower cylindrical rod 131 and the valve port 141 are both chamfered.

[0046] The float 15 is cylindrical, located in the upper chamber 18 and fixed to the outer wall of the lower cylindrical rod 131. There is a gap between the float 15 and the valve body 11 to facilitate the passage of gas. Lubricating oil is filled in the valve body 11, filling the lower chamber 19 and slightly overflowing the partition 12 to the upper chamber 18, so that the float 15 floats on the lubricating oil and creates a gap with the partition 12.

[0047] One end of the exhaust valve inlet pipe 16 is fixedly connected to the bottom of the valve body 11, i.e., the outer wall of the bottom plate, and the other end is connected to the filter of the hydraulic system. A one-way valve (not shown in the figure) is installed on the exhaust valve inlet pipe 16. In the embodiment of the present application, a ball valve can be used, which is mainly used to prevent the lubricating oil from splashing out when the device is dismantled. The exhaust valve outlet pipe 17 is fixedly connected to the top of the valve body 11, i.e., the outer wall of the top plate, and covers the first air outlet 112 inside.

[0048] Reference Figure 1 Under normal conditions, that is, when the equipment is working normally, the lubricating oil makes the float 15 float up, the end of the lower cylindrical rod 131 abuts against the valve 14 to form a seal, and the automatic scheduling valve is in a closed state; refer to Figure 3 When gas is generated in the filter, the gas enters the lower chamber 19 from the exhaust valve inlet pipe 16, and then enters the upper chamber 18 through the second air outlet 122, so that the air pressure in the upper chamber 18 continues to increase. After reaching the critical point, the float 15 drives the ejector pin 13 to sink. At this time, the seal formed at the abutment between the ejector pin 13 and the valve 14 is released, that is, the automatic exhaust valve 1 is in the open state, and the gas is discharged into the oil mist separator through the valve port 141 and the first air outlet 112 in sequence.

[0049] Reference Figure 3The oil mist filtering device 2 includes a filter housing 21, a filter element 22, a filter air inlet pipe 23, a filter air outlet pipe 24 and a limit assembly; wherein the filter housing 21 includes an upper housing 211 and a lower housing 212 detachably connected to the upper housing 211 (not shown in the figure), and the detachable connection method can be a threaded connection or a snap-on connection, etc., so as to replace the filter element 22; the filter element 22 is cylindrical with a hollow interior and openings at both ends; the filter air inlet pipe 23 is integrally formed on a side of the lower housing 212 away from the opening, and one end of the filter air inlet pipe 23 extends to the interior of the lower housing 212 and is connected to the lower housing 212; the filter air outlet pipe 24 is integrally formed on a side of the upper housing 211 away from the opening, and is connected to the upper housing 211.

[0050] The connecting piece 3 for connecting the automatic exhaust valve 1 and the oil mist filter device 2 can be a clamp or a clamp; a mounting plate is fixedly connected at the pipe openings of the filter air inlet pipe 23 and the exhaust valve air outlet pipe 17, and the two mounting plates are abutted and locked by the connecting piece 3. A sealing ring can be provided between the two mounting plates as needed.

[0051] Reference Figure 3 and Figure 4 The limiting assembly includes a mounting seat 25, a top cover 26 and a spring 27; wherein the mounting seat 25 is located in the lower shell 212, and specifically includes an annular supporting plate 251, an inner circular plate 252 fixedly connected to the inner circle of the supporting plate 251, and an outer circular plate 253 fixedly connected to the outer circle of the supporting plate 251. A U-shaped groove is formed between the supporting plate 251, the inner circular plate 252 and the outer circular plate 253. The mounting opening formed by the inner circular plate 252 is sleeved on the tube body extending from the filter inlet pipe 23 to the inside of the filter shell 21 through its own enclosure. One end of the filter element 22 is placed upright on the supporting plate 251, and an annular supporting plate 254 is fixedly connected to the side of the supporting plate 251 away from the U-shaped groove. The supporting plate 254 is processed with an annular groove on the side facing the filter inlet pipe 23, and a sealing ring is installed in the annular groove. When the mounting seat 25 is installed on the filter inlet pipe 23, the sealing ring is pressed between the two to play a sealing role.

[0052] Reference Figure 3 and Figure 5 The top cover 26 is located in the upper shell 211, and specifically includes a pressure plate 261 that is pressed on the end of the filter element 22 away from the mounting seat 25, and a limit ring 262 fixed to the pressure plate 261. The limit ring 262 is sleeved on the outside of the filter element 22 and is mainly used to limit the movement of the filter element 22. The side of the pressure plate 261 away from the limit ring 262 is recessed toward the limit ring 262 and forms a groove 263; the spring 27 is always in a compressed state, with one end against the inner wall of the upper shell 211 and the other end against the groove 263 of the pressure plate 261, and is mainly used to cooperate with the top cover 26 and the mounting seat 25 to fix the filter element 22.

[0053] After passing through the filter inlet pipe 23, the gas enters the filter element 22 for filtration, and the filtered gas is discharged into the atmosphere through the filter outlet pipe 24, while the oil mist carried in the gas is adsorbed on the filter element 22. As the adsorption amount increases, the liquefied oil is gathered in the U-shaped groove of the mounting seat 25 for collection so as to be recycled and cleaned.

[0054] The implementation principle of the embodiment of the present application is as follows: under normal conditions, that is, when the equipment is working normally, the lubricating oil causes the float 15 to float up, the end of the lower cylindrical rod 131 abuts against the valve 14 to form a seal, and the automatic exhaust valve is in a closed state; when gas is generated in the filter, the gas enters the lower chamber 19 from the exhaust valve inlet pipe 16, and then enters the upper chamber 18 through the second air outlet 122, so that the air pressure in the upper chamber 18 continues to increase. After reaching the critical point, the float 15 drives the ejector pin 13 to sink. At this time, the seal formed at the abutment between the ejector pin 13 and the valve 14 is released, that is, the automatic exhaust valve 1 is in an open state, and the gas is discharged into the oil mist separator through the valve port 141 and the first air outlet 112 in turn, and then discharged into the atmosphere after filtration.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An exhaust gas degreasing device for a filter, characterized in that: It comprises an automatic exhaust valve (1) and an oil mist filter device (2) which are arranged in sequence from bottom to top and are connected, and a connecting piece (3) for connecting the automatic exhaust valve (1) and the oil mist filter device (2) is provided between the automatic exhaust valve (1) and the oil mist filter device (2); The automatic exhaust valve (1) is installed on the filter of the hydraulic system; The oil mist filtering device (2) comprises a filter housing (21), a filter element (22) installed in the filter housing (21), a filter air inlet pipe (23) fixedly connected to and connected to the filter housing (21), and a filter air outlet pipe (24) fixedly connected to and connected to the filter housing (21); one end of the filter air inlet pipe (23) is installed on the automatic exhaust valve (1) through a connecting piece (3), and the other end of the filter air inlet pipe (23) extends into the filter element (22); the oil mist entering the filter housing (21) from the filter air inlet pipe (23) is filtered by the filter element (22) and then discharged from the filter air outlet pipe (24).

2. The exhaust gas degreasing device for a filter according to claim 1, characterized in that: The filter housing (21) comprises an upper housing (211) and a lower housing (212) detachably connected to the upper housing (211); a filter air inlet pipe (23) is integrally formed on a side of the lower housing (212) away from an opening and one end of the filter air inlet pipe (23) extends into the interior of the lower housing (212); and a filter air outlet pipe (24) is integrally formed on a side of the upper housing (211) away from the opening.

3. The exhaust gas degreasing device for a filter according to claim 2, characterized in that: The filter element (22) is in the shape of a cylinder with a hollow interior and openings at both ends; a limiting component for fixing the filter element (22) is provided in the filter housing (21); The limiting component comprises: A mounting seat (25) is located in the lower housing (212), and a mounting opening is provided on the mounting seat (25). The mounting seat (25) is sleeved on the pipe body of the filter air inlet pipe (23) extending into the interior of the filter housing (21) through the mounting opening, and one end of the filter element (22) stands on the mounting seat (25); A top cover (26) is located in the upper housing (211) and covers the other end of the filter element (22); The spring (27) is in a compressed state, with one end abutting against the inner wall of the upper shell (211) and the other end abutting against the top cover (26).

4. The exhaust gas degreasing device for a filter according to claim 3, characterized in that: The mounting seat (25) comprises a circular supporting plate (251), an inner circular plate (252) fixedly connected to the inner circle of the supporting plate (251), and an outer circular plate (253) fixedly connected to the outer circle of the supporting plate (251), wherein a U-shaped groove is formed between the supporting plate (251), the inner circular plate (252) and the outer circular plate (253); The inner circular plate (252) is sleeved on the pipe body of the filter air inlet pipe (23) extending into the interior of the filter housing (21) through the mounting opening formed by the inner circular plate (252) enclosed by itself; One end of the filter element (22) stands on a supporting plate (251).

5. The exhaust gas degreasing mist device for a filter according to claim 4, characterized in that: A support plate (254) is fixedly connected to the side of the support plate (251) away from the U-shaped groove, and a sealing ring is installed on the side of the support plate (254) facing the installation opening.

6. The exhaust gas degreasing mist device for a filter according to claim 3, characterized in that: The top cover (26) comprises a pressing plate (261) pressed on one end of the filter element (22) away from the mounting seat (25), and a limiting ring (262) fixedly connected to the pressing plate (261), wherein the limiting ring (262) is sleeved on the outside of the filter element (22).

7. The exhaust gas degreasing device for a filter according to claim 6, characterized in that: The side of the pressure plate (261) away from the limiting ring (262) is recessed toward the limiting ring (262) to form a groove (263), and one end of the spring (27) is located in the groove (263).

8. The exhaust gas degreasing mist device for a filter according to claim 1, characterized in that: The automatic exhaust valve (1) comprises: The valve body (11) is a hollow barrel-shaped structure. A first guide hole (111) and a first air outlet hole (112) are provided on the top of the valve body (11). The first guide hole (111) is located at the center of the top of the valve body (11). A partition (12) is fixedly connected to the valve body (11) to divide the interior of the valve body (11) into an upper chamber (18) and a lower chamber (19). A second guide hole (121) and a second air outlet hole (122) are provided on the partition (12). The second guide hole (121) is located at the center of the partition (12). The ejector pin (13) comprises a lower cylindrical rod (131) and an upper cylindrical rod (132) which are integrally formed and coaxially arranged, the diameter of the lower cylindrical rod (131) being larger than that of the upper cylindrical rod (132), the upper cylindrical rod (132) being slidably inserted into the first guide hole (111), and the lower cylindrical rod (131) being slidably inserted into the second guide hole (121); The valve (14) is hollow inside and has an open end. The open end of the valve (14) is fixedly connected to the inner top wall of the valve body (11) and covers the first air hole (112) inside. The valve (14) is provided with a valve port (141). The upper cylindrical rod (132) passes through the valve port (141). The size of the lower cylindrical rod (131) is larger than the valve port (141). A float (15) is located in the upper chamber (18) and is fixed to the lower cylindrical rod (131), and a gap exists between the float (15) and the valve body (11); Lubricating oil is filled in the valve body (11) and slightly overflows the partition (12). Under normal conditions, the float (15) floats upward, causing the end of the lower cylindrical rod (131) to abut against the valve (14) to close the valve port (141); The exhaust valve air inlet pipe (16) has one end fixedly connected to the outer wall of the bottom of the valve body (11) and the other end connected to the filter of the hydraulic system. A one-way valve for only allowing gas to pass is installed on the exhaust valve air inlet pipe (16); The exhaust valve air outlet pipe (17) is fixedly connected to the outer wall of the top of the valve body (11) and covers the first air outlet hole (112) inside.

9. The exhaust gas degreasing mist device for a filter according to claim 8, characterized in that: The lower cylindrical rod (131) and the valve port (141) are both machined with chamfers on the opposite sides thereof for sealing.

10. The exhaust gas degreasing mist device for a filter according to claim 8, characterized in that: The connecting piece (3) is a clamp or a clamp; the pipe openings of the filter air inlet pipe (23) and the exhaust valve air outlet pipe (17) are both fixedly connected with a mounting plate for fixing the connecting piece (3).

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