Filter with overflow valve structure

Abstract

The utility model belongs to the technical field of filters, and particularly relates to a filter with an overflow valve structure, which comprises a shell, an oil inlet is communicated and fixed at the top of the shell, a one-way valve is arranged in the oil inlet, an overflow pipeline with an opening on one side is arranged on the left side of the shell, and a through hole is arranged on the inner wall of the left side of the shell. An overflow opening is formed in the inner wall of the left side of the shell. The rotary knob is unlocked, the rotary knob is rotated to drive the lead screw to rotate, the adjusting rod is in threaded connection with the lead screw, and the end of the adjusting rod is fixedly connected with the sliding block, so that rotation of the lead screw can be converted into linear motion of the adjusting rod under the limiting effect of the sliding groove on the sliding block; the adjusting rod moves to drive the sliding blocks connected with the adjusting rod to slide in the sliding groove, then the distance between the two sliding blocks is changed, the spring between the two sliding blocks is compressed, when the spring is compressed, the elastic force of the spring is increased, the pressure needed for opening the overflow valve is also increased, and flexible adjustment and stable keeping of the opening pressure of the overflow valve are achieved.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically to a filter with an overflow valve structure. Background Technology

[0002] A filter is an accessory that uses filter paper to filter impurities or gases. It generally refers to automotive filters, which are engine components.

[0003] Chinese patented invention CN210239891U discloses an engine filter. This engine filter includes a housing with an oil inlet at the top. A support plate is located inside the housing, and an annular filter plate is fixedly connected to its surface. The annular filter plate is fixedly installed on the inner wall of the housing, and its surface has filter holes. A spring is fixedly installed on the upper surface of the support plate, and a conical check valve is fixedly connected to the end of the spring away from the support plate. Filter paper is fixedly installed inside the housing on the lower surface of the support plate. The engine filter has a connection hole on its housing surface that matches an overflow valve. When the filter components inside the filter become clogged, causing oil accumulation, and the pressure reaches the spring force of the overflow valve, the oil flows from the connection hole through the overflow pipe into the bottom oil reservoir and out through the oil outlet, achieving pressure reduction. The oil undergoes four filtrations, improving filtration efficiency.

[0004] However, this device still has some problems. In actual use, the most prominent one is that the spring force of the overflow valve is not adjustable. During the long-term use of the filter, the spring force gradually weakens. Once the spring force weakens, the opening pressure of the overflow valve will change, and the originally set pressure protection mechanism will not be able to execute accurately. This may cause a series of problems. For example, if the overflow valve opens prematurely before the filter reaches a severely clogged state, some unfiltered oil will flow directly into the engine, affecting the engine's lubrication and performance. Or, if the filter is already severely clogged and the pressure is far beyond the normal range, the overflow valve may not open in time due to insufficient spring force, resulting in excessively high internal pressure in the filter, which may cause the filter to rupture, oil leakage, and other safety hazards. Therefore, we have proposed a filter with an overflow valve structure to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a filter with an overflow valve structure, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] A filter with an overflow valve includes a housing. The top of the housing is connected to and fixed with an oil inlet, which contains a one-way valve. The left side of the housing has an overflow pipe with one side open. A through hole is formed on the left inner wall of the housing, and an overflow port is formed on the left inner wall of the housing. An overflow valve is provided on the overflow port. Sliding grooves are formed on both inner walls of the overflow pipe. Two sliders are slidably connected to the two sliding grooves. Two springs are fixedly connected between the two sliders. One side of one of the sliders is fixedly connected to one side of the overflow valve. A lead screw is rotatably connected to one inner wall of the overflow pipe. An adjusting rod is threaded onto the lead screw. The end of the adjusting rod is fixedly connected to one side of the other slider. The end of the lead screw extends outside the overflow pipe and is welded with a knob. The bottom of the housing is connected to and fixed with an oil outlet.

[0008] Furthermore, the knob is provided with multiple locking grooves, and a rectangular block is fixedly connected to one side of the overflow pipe.

[0009] Furthermore, a positioning rod is welded to the bottom of the rectangular block, and a locking pin is slidably connected to the positioning rod.

[0010] Furthermore, a tension spring is fixedly connected between the top of the locking pin and the bottom of the rectangular block, and the tension spring is movably sleeved on the positioning rod.

[0011] Furthermore, the locking pin engages with one of the multiple locking slots.

[0012] Furthermore, the adjusting rod has a threaded hole, and the adjusting rod is threadedly connected to the lead screw through the threaded hole.

[0013] Compared with the prior art, the present invention provides a filter with an overflow valve structure, which has the following advantages:

[0014] This invention utilizes an unlocking knob. Rotating the knob drives the lead screw to rotate. Since the adjusting rod is threadedly connected to the lead screw, and the end of the adjusting rod is fixedly connected to the slider, the rotation of the lead screw is converted into linear motion of the adjusting rod under the limiting effect of the sliding groove on the slider. The movement of the adjusting rod causes the slider connected to it to slide within the sliding groove, thereby changing the distance between the two sliders. This compresses the spring between the two sliders. When the spring is compressed, the spring force increases, and the pressure required to open the overflow valve also increases, thus achieving flexible adjustment and stable maintenance of the overflow valve opening pressure. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2This is a schematic diagram of the inclined three-dimensional structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the cut-open three-dimensional structure of the shell of this utility model;

[0018] Figure 4 This is a partial three-dimensional structural diagram of the shell of this utility model.

[0019] Figure 5 This is a partial three-dimensional structural diagram of the present invention.

[0020] In the diagram: 1. Housing; 2. Oil inlet; 3. Check valve; 4. Oil outlet; 5. Overflow port; 6. Overflow pipe; 7. Through hole; 8. Overflow valve; 9. Slide groove; 10. Slider; 11. Spring; 12. Lead screw; 13. Adjusting rod; 14. Knob; 15. Locking groove; 16. Rectangular block; 17. Positioning rod; 18. Locking pin; 19. Tension spring. Detailed Implementation

[0021] 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. Example

[0022] like Figure 1-5As shown, an embodiment of the present invention discloses a filter with an overflow valve structure, comprising a housing 1, an oil inlet 2 connected and fixed to the top of the housing 1, a one-way valve 3 disposed inside the oil inlet 2, an overflow pipe 6 with one side open on the left side of the housing 1, a through hole 7 and an overflow port 5 on the left side inner wall of the housing 1, an overflow valve 8 disposed on the overflow port 5, and sliding grooves 9 on both sides of the inner wall of the overflow pipe 6, with two sliders 10 slidably connected to the two sliding grooves 9, and two springs 11 fixedly connected between the two sliders 10. One side of one of the two sliders 10 is fixedly connected to one side of the overflow valve 8, and a lead screw 12 is rotatably connected to one side of the inner wall of the overflow pipe 6, with an adjusting rod 13 threadedly connected to the lead screw 12, the end of the adjusting rod 13 being connected to the other slider 10. One side of block 10 is fixedly connected, the end of screw 12 extends to the outside of overflow pipe 6 and is welded with knob 14, the bottom of housing 1 is connected to and fixed with oil outlet 4, unlock knob 14, by rotating knob 14, the screw 12 is driven to rotate. Since the adjusting rod 13 is threadedly connected to screw 12 and the end of adjusting rod 13 is fixedly connected to slider 10, under the limiting action of slide groove 9 on slider 10, the rotation of screw 12 will be converted into linear motion of adjusting rod 13. The movement of adjusting rod 13 will drive the slider 10 connected to it to slide in slide groove 9, thereby changing the distance between the two sliders 10, thereby compressing spring 11 between the two sliders 10. When spring 11 is compressed, the elastic force of spring 11 increases, and the pressure required to open overflow valve 8 also increases, realizing flexible adjustment and stable maintenance of the opening pressure of overflow valve 8.

[0023] In some embodiments, the knob 14 is provided with a plurality of locking grooves 15, and a rectangular block 16 is fixedly connected to one side of the overflow pipe 6. The rectangular block 16 serves as a support.

[0024] In some embodiments, a positioning rod 17 is welded to the bottom of the rectangular block 16, and a locking pin 18 is slidably connected to the positioning rod 17.

[0025] In some embodiments, a tension spring 19 is fixedly connected between the top of the locking pin 18 and the bottom of the rectangular block 16. The tension spring 19 is movably sleeved on the positioning rod 17, and the positioning rod 17 serves a positioning function.

[0026] In some embodiments, the locking pin 18 engages with one of the plurality of locking slots 15.

[0027] In some embodiments, the adjusting rod 13 is provided with a threaded hole, and the adjusting rod 13 is threadedly connected to the lead screw 12 through the threaded hole. Under the biting force of the threaded hole and the lead screw 12, the adjusting rod 13 can be fixed after moving to a suitable position.

[0028] Working principle or structural principle: During use, oil enters the housing 1 through the oil inlet 2 and the one-way valve 3. When the filter components inside the filter become clogged, causing oil accumulation, when the pressure reaches the spring force value of the overflow valve 8, the oil will exert a sufficiently large force on the overflow valve 8 to overcome the spring force of the spring 11, causing the overflow valve 8 to open. The oil flows from the connecting hole through the overflow pipe 6 and through the through hole 7 into the oil storage chamber at the bottom of the housing 1, and flows out from the oil outlet 4, achieving the purpose of pressure reduction. After long-term use, when it is necessary to adjust the opening pressure of the overflow valve 8, the operator moves the locking pin 18. The locking pin 18 slides on the positioning rod 17 and compresses the tension spring 19, causing the locking pin 18 to separate from one of the multiple locking grooves 15. By rotating the knob 14, the screw 12 is driven to rotate. Because the adjusting rod 13 and the screw... The screw 12 is threaded, and the end of the adjusting rod 13 is fixedly connected to the slider 10. Under the limiting action of the slide groove 9 on the slider 10, the rotation of the screw 12 will be converted into the linear motion of the adjusting rod 13. The movement of the adjusting rod 13 will drive the slider 10 connected to it to slide in the slide groove 9, thereby changing the distance between the two sliders 10, thus compressing the spring 11 between the two sliders 10. When the spring 11 is compressed, the elastic force of the spring 11 increases, and the pressure required to open the overflow valve 8 also increases, realizing the flexible adjustment and stable maintenance of the opening pressure of the overflow valve 8. After adjustment, the force on the locking pin 18 is released, and the tension spring 19, which is in a compressed state, returns to its original position. The tension spring 19 drives the locking pin 18 to engage with another locking groove 15 among the multiple locking grooves 15, thereby fixing the knob 14 and preventing accidental rotation.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A filter with an overflow valve, comprising a housing (1), characterized in that: The top of the housing (1) is connected to and fixed with an oil inlet (2), and a one-way valve (3) is provided inside the oil inlet (2). An overflow pipe (6) with one side open is provided on the left side of the housing (1). A through hole (7) is opened on the inner wall of the left side of the housing (1). An overflow port (5) is opened on the inner wall of the left side of the housing (1). An overflow valve (8) is provided on the overflow port (5). Slide grooves (9) are opened on both sides of the inner wall of the overflow pipe (6). Two sliders (10) are slidably connected on the two slide grooves (9). The two sliders (10) are fixed together. Two springs (11) are connected. One side of one of the two sliders (10) is fixedly connected to one side of the overflow valve (8). A screw (12) is rotatably connected to the inner wall of one side of the overflow pipe (6). An adjusting rod (13) is threaded onto the screw (12). The end of the adjusting rod (13) is fixedly connected to one side of the other slider (10) of the two sliders (10). The end of the screw (12) extends to the outside of the overflow pipe (6) and is welded with a knob (14). The bottom of the housing (1) is connected to and fixed with an oil outlet (4).

2. The filter with overflow valve structure according to claim 1, characterized in that: The knob (14) has multiple locking grooves (15), and a rectangular block (16) is fixedly connected to one side of the overflow pipe (6).

3. The filter with overflow valve structure according to claim 2, characterized in that: A positioning rod (17) is welded to the bottom of the rectangular block (16), and a locking pin (18) is slidably connected to the positioning rod (17).

4. The filter with overflow valve structure according to claim 3, characterized in that: A tension spring (19) is fixedly connected between the top of the locking pin (18) and the bottom of the rectangular block (16), and the tension spring (19) is movably sleeved on the positioning rod (17).

5. The filter with an overflow valve structure according to claim 4, characterized in that: The locking pin (18) engages with one of the locking slots (15) among a plurality of locking slots (15).

6. The filter with an overflow valve structure according to claim 5, characterized in that: The adjusting rod (13) has a threaded hole, and the adjusting rod (13) is threadedly connected to the lead screw (12) through the threaded hole.

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