Main filter element assembly

Abstract

The utility model discloses a main filter element assembly, and relates to the technical field related to filtration. The filter comprises an upper end cover, a lower end cover, an outer framework, an inner framework, a bypass valve and an auxiliary filter element, the outer framework, a filter layer and the inner framework are fixed between the upper end cover and the lower end cover, and the bypass valve is movably connected in the lower end cover; the bypass valve comprises a valve shell and a valve cylinder fixed to the bottom end of the valve shell in a penetrating mode, a spring is fixed into a first cylinder body and a second cylinder body in the valve shell, a rolling ball is arranged between the end, away from the first cylinder body, of the second cylinder body and an upper port of the valve cylinder, an oil outlet is formed in the periphery of the valve shell outside the rolling ball, and an auxiliary filter element is fixed to the periphery of the valve shell outside the oil outlet. Through the arrangement of the upper end cover, the lower end cover, the bypass valve and the auxiliary filter element, the problem that once the filter layer of the filter element is blocked, the operation of the whole equipment system is easily influenced is solved; and when temporary oil supply is carried out after the filtering layer is blocked, a corresponding auxiliary filtering function is lacked, and a reminding function is lacked.

Description

Technical Field

[0001] The utility model belongs to the technical field related to filtration, and in particular relates to a main filter element assembly. Background Art

[0002] Filter elements are products with filtering and purification functions. They are used to separate impurities from the original fluid and are mainly used for gas-liquid separation, solid-liquid separation, exhaust dust filtration, and environmental protection. Currently, filter elements are mainly divided into materials such as stainless steel filter elements, copper filter elements, titanium filter elements, Hastelloy alloy filter elements, and plastic filter elements. According to the filter medium, they are mainly used in oil filtration, air filtration, water filtration and other fields. They are suitable for machinery, electronics, petroleum, chemical industry, transportation and other fields. However, the relevant filter element structure still has the following disadvantages in actual use:

[0003] When the filter element is working, for example, the oil filter element needs to filter out impurities in the oil to obtain clean oil. Usually, the filter element filtration is mostly outside-in and inside-out, that is, the oil enters from the outside of the filter element, passes through the filter layer and is discharged from the inner cavity. However, once the filter element is used for a long time, the filter layer will block a large amount of impurities. At this time, the filter layer may become clogged. Once the filter layer is clogged, the oil cannot enter. At this time, the downstream equipment cannot get oil supply, and the oiling equipment is still pumping oil, which can easily cause equipment failure. Therefore, a temporary oil supply function is needed to assist use when the filter layer is clogged to avoid equipment damage.

[0004] Secondly, in the context of the above problems, once the filter layer of the filter element is blocked, if temporary oil supply is performed without filtering, impurities in the oil may still affect the operation of the equipment, and external personnel should be reminded in time when the filter layer is blocked and temporary oil supply is performed. Utility Model Content

[0005] The purpose of the utility model is to provide a main filter element assembly, which solves the problems of the filter layer of the filter element being easily affected by the operation of the entire equipment system once it is blocked, and the lack of corresponding auxiliary filtering function and reminder function when temporary oil supply is performed after the filter layer is blocked, by arranging an upper end cover, a lower end cover, a bypass valve, and an auxiliary filter element.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The utility model is a main filter element assembly, comprising an upper end cover, a lower end cover, an outer frame, an inner frame, a bypass valve and an auxiliary filter element. The outer frame, the filter layer and the inner frame are fixed between the upper end cover and the lower end cover, and the outer frame, the filter layer and the inner frame are distributed layer by layer from the outside to the inside. The lower end cover is also movably connected with a bypass valve.

[0008] The bypass valve includes a valve housing and a valve cylinder fixed to the bottom end of the valve housing. Cylinder body 1 and cylinder body 2 are arranged in the valve housing from top to bottom, and the end where cylinder body 1 and cylinder body 2 are close to each other is open. A spring is fixed to the inside of cylinder body 1 and cylinder body 2. A rolling ball is arranged between the end of cylinder body 2 away from cylinder body 1 and the upper end of the valve cylinder, and the rolling ball is arranged in the valve housing. Oil outlets distributed in a ring array are opened through the outer periphery of the valve housing outside the rolling ball, and an auxiliary filter element is fixed to the outer periphery of the valve housing outside the oil outlet.

[0009] Furthermore, an O-ring is provided on the port sleeve of the upper end cover, a ring groove 1 is provided at the bottom end of the upper end cover, a ring groove 2 is provided at the upper end of the lower end cover, and the upper ends of the outer skeleton, the filter layer and the inner skeleton are all extended into the ring groove 1 and fixed to the upper end cover, and the lower ends of the outer skeleton, the filter layer and the inner skeleton are all extended into the ring groove 2 and fixed to the lower end cover.

[0010] Furthermore, the lower end cover is provided with a vertical through-hole 1 and a through-hole 2, and the through-hole 1 is located above the through-hole 2 and is connected to the through-hole 2. The inner diameter of the through-hole 1 is smaller than the inner diameter of the through-hole 2, and threaded grooves are provided on the inner wall of the through-hole 1 and the inner wall of the lower part of the through-hole 2.

[0011] Furthermore, an end head is fixed to the bottom end of the valve cylinder, a limiting ring is fixed to the middle part of the valve cylinder, the outer periphery of the valve cylinder and the outer periphery of the end head above the limiting ring are both provided with threads, a sealing ring is also provided on the outside of the valve cylinder on the limiting ring, the upper area of ​​the valve cylinder above the sealing ring is screwed into the first port and fixed, and the end head is screwed into the second port and fixed.

[0012] Furthermore, the lower end cover is also provided with oil inlets distributed in a circular array on the circumferential side, and the oil inlets are connected to the through hole 2. The lower area of ​​the valve cylinder below the limit ring and above the end head is located in the through hole 2 connected to the oil inlet, and the valve cylinder in this area is also provided with a through hole for oil inlet.

[0013] Furthermore, a pressure sensor is fixed on the inner end surface of the cylinder one, a pressure rod is fixed on the inner end surface of the cylinder two, the upper end of the pressure rod extends into the cylinder two, and the pressure sensor is electrically connected to an external alarm.

[0014] Furthermore, the radius of the rolling ball is greater than the inner cavity radius of the valve cylinder and the second cylinder body, and the valve housing and the auxiliary filter element are both located in the inner cavity of the inner skeleton.

[0015] The utility model has the following beneficial effects:

[0016] The utility model solves the problem that once the filter layer of the filter element is blocked, the operation of the entire equipment system is easily affected by the arrangement of the upper end cover, the lower end cover and the bypass valve. First, during normal oil filtering, the oil enters from the outside of the outer frame, passes through the outer frame, the filter layer and the inner frame in sequence, and flows out from the port of the upper end cover to complete the entire filtering process. Once the filter layer blocks too many impurities and the oil outside the filter layer cannot enter, the pressure of the oil supply at this time forces the oil to enter from the oil inlet of the lower end cover, enter the valve cylinder, and squeeze out the ball upward. At this time, the oil is discharged from the oil outlet of the valve housing, passes through the auxiliary filter element, enters the inner frame, and then flows out from the port of the upper end cover. The entire process does not affect the movement of the entire equipment system. When the filter layer is blocked, it can still supply oil stably and will not damage the equipment.

[0017] The utility model solves the problems of lack of corresponding auxiliary filtering function and lack of reminder function when temporary oil supply is carried out after the filter layer is blocked by arranging a bypass valve and an auxiliary filter element; when the bypass valve is used for oil supply, the oil enters from the lower end cover, enters the valve cylinder, and displaces the ball upward, and the oil flows out from the oil outlet of the valve shell, is filtered by the auxiliary filter element, and then enters the inner cavity of the inner skeleton, which can ensure that the oil is still filtered during temporary auxiliary oil supply, and in the process of the ball being displaced upward by the oil, the spring is compressed, and the second cylinder approaches the first cylinder. At this time, the pressure rod will contact the pressure sensor, and send a signal to the external alarm in time, indicating that the filtering function of the filter layer can no longer be used and needs to be replaced in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0019] Figure 1 It is a three-dimensional diagram of a main filter element assembly;

[0020] Figure 2 This is a cross-sectional view of the outer skeleton, filter layer, and inner skeleton;

[0021] Figure 3 This is a cross-sectional view of the connection between the exoskeleton, filter layer, upper end cover, and lower end cover;

[0022] Figure 4 is a cross-sectional view of the upper end cover;

[0023] Figure 5 It is the structural diagram of the lower end cover;

[0024] Figure 6 is a cross-sectional view of the lower end cover;

[0025] Figure 7 This is the structural diagram of the bypass valve;

[0026] Figure 8 It is a cross-sectional view of the bypass valve and the auxiliary filter element;

[0027] Figure 9 It is a cross-sectional connection diagram of cylinder one and cylinder two.

[0028] Reference numerals:

[0029] 1. Upper end cover; 101. O-ring; 102. Ring groove 1; 2. Lower end cover; 201. Oil inlet; 202. Ring groove 2; 203. Port 1; 204. Port 2; 3. Exoskeleton; 4. Endoskeleton; 5. Filter layer; 6. Bypass valve; 601. Valve housing; 6011. Oil outlet; 602. Valve cylinder; 6021. Limiting ring; 6022. Sealing ring; 6023. End cap; 603. Cylinder body 1; 6031. Pressure sensor; 604. Cylinder body 2; 6041. Pressure rod; 605. Ball; 606. Spring; 7. Auxiliary filter element. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] See also Figure 1-9 As shown, the utility model is a main filter element assembly, including an upper end cover 1, a lower end cover 2, an outer frame 3, an inner frame 4, a bypass valve 6 and an auxiliary filter element 7. The outer frame 3, the filter layer 5 and the inner frame 4 are fixed between the upper end cover 1 and the lower end cover 2, and the outer frame 3, the filter layer 5 and the inner frame 4 are distributed layer by layer from the outside to the inside. The lower end cover 2 is also movably connected to the bypass valve 6;

[0032] The main structure of the filter element is formed by the outer frame 3, the filter layer 5 and the inner frame 4 fixed between the upper end cover 1 and the lower end cover 2. It is also composed of a conventional filter element. A bypass valve 6 is installed in the lower end cover 2. When the filter layer 5 is blocked after long-term use, temporary oil inlet operation is carried out through the bypass valve 6.

[0033] The bypass valve 6 includes a valve housing 601 and a valve cylinder 602 fixed to the bottom end of the valve housing 601. A cylinder 1 603 and a cylinder 2 604 are arranged from top to bottom in the valve housing 601. The ends of the cylinders 1 603 and 604 that are close to each other are open. A spring 606 is fixed to the interiors of the cylinders 1 603 and 604. A ball 605 is provided between the end of the cylinder 2 604 away from the cylinder 1 603 and the upper end of the valve cylinder 602. The ball 605 is arranged in the valve housing 601. Oil outlets 6011 distributed in an annular array are formed through the outer periphery of the valve housing 601 outside the ball 605. An auxiliary filter element 7 is fixed to the outer periphery of the valve housing 601 outside the oil outlets 6011.

[0034] The bypass valve 6 is first composed of a valve cylinder 602 and a valve housing 601 that are interconnected to form the main outer shell part. The valve housing 601 is partially located in the inner skeleton 4, and the valve cylinder 602 is partially located in the lower end cover 2. The cylinder body 1 603 is fixed to the inner top of the valve housing 601. When the oil enters the interior of the valve cylinder 602, the pressure of the oil will displace the ball 605 upward. At this time, the spring 606 is compressed, and the cylinder body 2 604 moves up close to the cylinder body 1 603. After the oil squeezes out the ball 605, it is discharged from the oil outlet 6011, and then filtered out from the auxiliary filter element 7 and enters the inner cavity of the inner skeleton 4.

[0035] The port jacket of the upper end cover 1 is provided with an O-ring 101, the bottom end of the upper end cover 1 is provided with a ring groove 102, the upper end of the lower end cover 2 is provided with a ring groove 202, and the upper ends of the outer frame 3, the filter layer 5 and the inner frame 4 are all extended into the ring groove 102 and fixed to the upper end cover 1, and the lower ends of the outer frame 3, the filter layer 5 and the inner frame 4 are all extended into the ring groove 202 and fixed to the lower end cover 2;

[0036] The upper end cover 1 is connected to the downstream equipment and cooperates with the O-ring 101 to increase the sealing. The distribution of the ring groove 102 and the ring groove 2 202 helps to limit the position of the upper and lower ends of the outer skeleton 3, the filter layer 5 and the inner skeleton 4, making their fixation with the upper end cover 1 and the lower end cover 2 more stable.

[0037] A first through-hole 203 and a second through-hole 204 are vertically formed in the lower end cover 2. The first through-hole 203 is located above and communicates with the second through-hole. The inner diameter of the first through-hole 203 is smaller than that of the second through-hole 204. Threaded grooves are provided on the inner wall of the first through-hole 203 and the inner wall of the lower portion of the second through-hole 204.

[0038] An end cap 6023 is fixed to the bottom end of the valve cylinder 602, and a limit ring 6021 is fixed to the middle of the valve cylinder 602. Threads are provided on the outer periphery of the valve cylinder 602 and the end cap 6023 above the limit ring 6021. A sealing ring 6022 is also sleeved on the valve cylinder 602 on the limit ring 6021. The upper area of ​​the valve cylinder 602 above the sealing ring 6022 is screwed into the first port 203 and fixed therein. The end cap 6023 is screwed into the second port 204 and fixed therein.

[0039] When installing the bypass valve 6, insert the valve housing 601 from under the lower end cover 2 until the valve housing 601 enters the inner cavity of the inner skeleton 4, rotate the component below the end head 6023, so that the upper part of the valve cylinder 602 is screwed into the port 1 203, and the end head 6023 is simultaneously screwed into the port 2 204 until the sealing ring 6022 is pressed against the upper end surface of the port 2 204 to increase the sealing performance. The setting of the limit ring 6021 also indicates that it is screwed into the specified position. The installation of the bypass valve 6 is then completed. The auxiliary filter element 7 is then installed on the outside of the valve housing 601, and then the lower end cover 2 is assembled with the outer skeleton 3, the filter layer 5 and the inner skeleton 4.

[0040] The lower end cap 2 is also provided with oil inlets 201 arranged in a circular array, and the oil inlets 201 are connected to the second through-hole. The lower region of the valve cylinder 602, located below the retaining ring 6021 and above the end 6023, is located within the second through-hole connected to the oil inlet 201. The valve cylinder 602 in this region is also provided with a through-hole for oil inlet.

[0041] When the oil cannot enter through the filter layer 5, the oil enters from the oil inlet 201 of the lower end cover 2, and then enters the valve cylinder 602 from the oil inlet hole on the valve cylinder 602 until the interior of the valve cylinder 602 is filled, and then the ball 605 is squeezed into the valve housing 601.

[0042] A pressure sensor 6031 is fixed on the inner end surface of the first cylinder 603, and a pressure rod 6041 is fixed on the inner end surface of the second cylinder 604. The upper end of the pressure rod 6041 extends into the second cylinder 604. The pressure sensor 6031 is electrically connected to an external alarm.

[0043] When the oil enters the valve cylinder 602 and displaces the ball 605, the spring 606 is compressed, and the cylinder 2 604 moves closer to the cylinder 1 603. At this time, the pressure rod 6041 will contact the pressure sensor 6031, and send a signal to the external alarm in time, indicating that the filtering function of the filter layer 5 is no longer usable and needs to be replaced in time.

[0044] The radius of the ball 605 is larger than the inner radius of the valve cylinder 602 and the second cylinder body 604, so that the ball 605 will not completely enter the second cylinder body 604 and the valve cylinder 602; the valve housing 601 and the auxiliary filter element 7 are both located in the inner cavity of the inner skeleton 4.

[0045] The specific working principle of the present invention is as follows: first, the upper end cover 1 is connected to the downstream equipment and cooperates with the O-ring 101 to increase the sealing performance. The upper end cover 1 is used for oil outlet use. During normal oil filtering, the oil enters from the outside of the outer skeleton 3, passes through the outer skeleton 3, the filter layer 5, and the inner skeleton 4 in sequence, until it flows out from the port of the upper end cover 1, completing the entire filtering process; once the impurities blocked by the filter layer 5 are too many and the oil outside the filter layer 5 cannot enter, the pressure of the oil supply at this time forces the oil to enter from the oil inlet 201 of the lower end cover 2, and then enter the valve cylinder 602 from the oil inlet through-hole on the valve cylinder 602, until the interior of the valve cylinder 602 is filled, and then the ball 60 is squeezed out. 5 is moved upward, and part of the oil passes through the gap between the ball 605 and the valve cylinder 602. At this time, the oil is discharged from the oil outlet 6011 of the valve housing 601, passes through the auxiliary filter element 7, enters the inner skeleton 4, and then flows out from the port of the upper end cover 1, completing the temporary auxiliary oil supply operation; at the same time, when the oil enters the valve cylinder 602 to displace the ball 605, the spring 606 is compressed, and the cylinder 2 604 approaches the cylinder 1 603. At this time, the pressure rod 6041 will contact the pressure sensor 6031, and a signal will be sent to the external alarm in time, indicating that the filtering function of the filter layer 5 is no longer usable and needs to be replaced in time, which serves as a reminder.

[0046] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions described in the aforementioned embodiments, any equivalent replacement of some of the technical features therein, and any modification, equivalent replacement, and improvement made are within the scope of protection of the present invention.

Claims

1. A main filter element assembly, comprising an upper end cover (1), a lower end cover (2), an outer frame (3), an inner frame (4), a bypass valve (6) and an auxiliary filter element (7), characterized in that: An outer frame (3), a filter layer (5) and an inner frame (4) are fixed between the upper end cover (1) and the lower end cover (2), and the outer frame (3), the filter layer (5) and the inner frame (4) are distributed layer by layer from the outside to the inside, and a bypass valve (6) is movably connected in the lower end cover (2); The bypass valve (6) includes a valve housing (601) and a valve cylinder (602) fixed to the bottom end of the valve housing (601). The valve housing (601) is provided with a cylinder body 1 (603) and a cylinder body 2 (604) from top to bottom, and the end where the cylinder body 1 (603) and the cylinder body 2 (604) are close to each other is open. A spring (606) is fixed inside the cylinder body 1 (603) and the cylinder body 2 (604). A rolling ball (605) is provided between the end of the second cylinder (604) away from the first cylinder (603) and the upper end of the valve cylinder (602), and the rolling ball (605) is provided in the valve housing (601). The outer periphery of the valve housing (601) outside the rolling ball (605) is provided with oil outlets (6011) distributed in a ring array, and an auxiliary filter element (7) is fixed to the outer periphery of the valve housing (601) outside the oil outlets (6011).

2. The main filter element assembly according to claim 1, characterized in that: The port outer sleeve of the upper end cover (1) is provided with an O-ring (101), the bottom end of the upper end cover (1) is provided with an annular groove 1 (102), the upper end of the lower end cover (2) is provided with an annular groove 2 (202), and the upper ends of the outer frame (3), the filter layer (5) and the inner frame (4) are all extended into the annular groove 1 (102) and fixed to the upper end cover (1), and the lower ends of the outer frame (3), the filter layer (5) and the inner frame (4) are all extended into the annular groove 2 (202) and fixed to the lower end cover (2).

3. The main filter element assembly according to claim 1, characterized in that: A through-hole 1 (203) and a through-hole 2 (204) are vertically penetrated in the lower end cover (2), and the through-hole 1 (203) is located above the through-hole 2 and communicates with the through-hole 2. The inner diameter of the through-hole 1 (203) is smaller than the inner diameter of the through-hole 2 (204), and thread grooves are provided on the inner wall of the through-hole 1 (203) and the inner wall of the lower portion of the through-hole 2 (204).

4. The main filter element assembly according to claim 3, characterized in that: The bottom end of the valve cylinder (602) is fixed with an end head (6023), the middle part of the valve cylinder (602) is fixed with a limiting ring (6021), the outer periphery of the valve cylinder (602) and the outer periphery of the end head (6023) above the limiting ring (6021) are both provided with threads, and the valve cylinder (602) on the limiting ring (6021) is also provided with a sealing ring (6022), the upper area of ​​the valve cylinder (602) above the sealing ring (6022) is screwed into the first port (203) and fixed, and the end head (6023) is screwed into the second port (204) and fixed.

5. The main filter element assembly according to claim 4, characterized in that: The lower end cover (2) is also provided with oil inlets (201) distributed in a ring array on its circumference, and the oil inlets (201) are connected to the second through hole. The lower area of ​​the valve cylinder (602) below the limit ring (6021) and above the end head (6023) is located in the second through hole connected to the oil inlet (201), and the valve cylinder (602) in this area is also provided with a through hole for oil inlet.

6. The main filter element assembly according to claim 1, characterized in that: A pressure sensor (6031) is fixed on the inner end surface of the cylinder body 1 (603), and a pressure rod (6041) is fixed on the inner end surface of the cylinder body 2 (604). The upper end of the pressure rod (6041) extends into the cylinder body 2 (604), and the pressure sensor (6031) is electrically connected to an external alarm.

7. The main filter element assembly according to claim 1, characterized in that: The radius of the rolling ball (605) is greater than the inner cavity radius of the valve cylinder (602) and the second cylinder body (604), and the valve housing (601) and the auxiliary filter element (7) are both located in the inner cavity of the inner skeleton (4).

Images