CN220609456U - Filter with bypass state monitoring function - Google Patents

Abstract

The filter with the bypass state monitoring function comprises a filter body and a bypass shell; a bypass channel is arranged in the bypass shell, two ports of the bypass channel are respectively plugged by a first plug and a second plug, a low-pressure through hole and a high-pressure through hole are arranged on the side wall of the bypass channel, and the low-pressure through hole and the high-pressure through hole are respectively correspondingly communicated with the outlet end and the inlet end of the filter body; the bypass channel is internally provided with an indication rod and a one-way valve structure, the end face of the first plug is provided with a limiting sliding hole which is movably spliced by the indication rod and is in sliding sealing with the indication rod, the one-way valve structure can be shifted along the bypass channel under the condition that the pressure of the high-pressure through hole is larger than that of the low-pressure through hole, so that the low-pressure through hole and the high-pressure through hole are communicated in the bypass shell, and the indication rod is pushed to move to expose out of the first plug; the filter can timely display bypass opening information to maintenance personnel, and the guarantee and maintainability of the filter are improved.

Description

Filter with bypass state monitoring function

Technical Field

The utility model relates to the technical field of oil filtration, in particular to a filter with a bypass state monitoring function.

Background

After the common oil filter is used for a certain time, the pressure difference between the front and the rear of the inlet and the outlet of the filter element is increased due to the gradual accumulation of the filter materials, and after the pressure difference between the front and the rear reaches a certain value, an oil bypass valve connected in parallel is opened, so that the oil flows from a bypass to avoid system flow interruption; however, when the bypass valve is opened, no feedback information is provided, the maintainer does not know that the standby bypass valve is opened, and the maintenance filter cannot be cleaned in time, so that a large amount of unfiltered oil enters the downstream of the system, and hidden danger is caused to downstream accessories.

Disclosure of Invention

In order to overcome the defects in the background art, the utility model discloses a filter with a bypass state monitoring function, which can timely display bypass opening information to maintenance personnel and improve the guarantee and maintainability of the filter.

In order to achieve the aim of the utility model, the utility model adopts the following technical scheme:

a filter with bypass state monitoring function comprises a filter body and a bypass shell; a bypass channel is arranged in the bypass shell, two ports of the bypass channel are respectively blocked by a first plug and a second plug, a low-pressure through hole and a high-pressure through hole are respectively arranged on the side wall of the bypass channel, which is close to the first plug and the second plug, and the low-pressure through hole and the high-pressure through hole are respectively correspondingly communicated with the outlet end and the inlet end of the filter body; be equipped with the pilot lever in the bypass passageway to and be in normal position and block low pressure through-hole and high pressure through-hole intercommunication and take reset function's check valve structure, the terminal surface of first end cap is equipped with the activity of adaptation pilot lever and pegs graft, and with the spacing slide hole of pilot lever sliding seal, the check valve structure can be shifted along the bypass passageway by the pressure that high pressure through-hole is greater than low pressure through-hole, makes low pressure through-hole and high pressure through-hole communicate in the bypass casing, and promotes the pilot lever removal to expose outside the first end cap.

Further, the outer end face center of the first plug is provided with a groove, an indicator is arranged in the groove, the limiting sliding hole penetrates through the bottom of the groove, and the outer end of the indicating rod is correspondingly connected with the indicator.

Further, the outer terminal surface central authorities of indicator are equipped with countersunk head through-hole, the outer end pole wall of pilot rod is equipped with first external screw thread, countersunk head through-hole's through-hole inner wall is equipped with the internal thread of adaptation external screw thread, countersunk head through-hole's counter bore is equipped with the locking swivel nut with the outer end correspondence spiro union of pilot rod.

Further, a sliding sleeve part sleeved with the indication rod is integrally arranged on the inner end surface of the first plug, and the sliding sleeve part and the indication rod are in sliding sealing through a spring return sealing ring.

Further, the shaft that the pilot rod is close to low pressure through-hole is equipped with the convex shoulder piece, the outer wall of sliding sleeve portion is equipped with second external screw thread and spiro union and has tightly decided the swivel nut, the bilateral symmetry of sliding sleeve portion is equipped with two shell fragments, the one end clamping of shell fragment is fixed in between first end face and the tight swivel nut in the end face, the other end of shell fragment extends along the pilot rod axial to when being close to the convex shoulder piece, bend earlier and be close to the pilot rod, bend again and keep away from the pilot rod and form V-arrangement folded end, and the minimum distance of two shell fragment V-arrangement folded ends is less than the external diameter of convex shoulder piece.

Further, the first plug and the second plug are respectively in threaded connection with two ports of the bypass channel, and sealing gaskets are arranged between the outer walls of the first plug and the second plug and the inner wall of the bypass channel.

Further, the check valve structure contains valve rod, valve plug and cover and locates the reset spring of valve rod body, and the bypass passageway inner wall diameter reduction that is located between low pressure through-hole and the high pressure through-hole is equipped with the ring boss, the valve plug is close to the one end conflict seal of low pressure through-hole with the ring boss, the one end that the valve rod is close to the second end cap is connected with first locating part, first locating part corresponds conflict with reset spring's one end, the body clearance cover of valve rod is equipped with the stop collar, the inner of stop collar is folded inwards and corresponds conflict with reset spring's the other end, the outer end of stop collar is folded outwards and corresponds the conflict with the other end of ring boss, the other end and the valve plug of valve rod correspond to be connected.

Further, the ring boss is arranged to be an inner ring sleeve part and an outer ring sleeve part which are inserted, sealed and fixed, the outer ring sleeve part is integrally connected with the bypass shell, and the valve plug and the limiting sleeve are respectively in corresponding conflict with two ends of the inner ring sleeve part.

Further, both ends of valve rod respectively with valve plug and first locating part threaded connection.

Further, the sleeve wall of the limit sleeve is provided with a plurality of flow holes.

Due to the adoption of the technical scheme, the utility model has the following beneficial effects:

according to the filter with the bypass state monitoring function disclosed by the utility model, when the pressure difference between the front part and the rear part of the filter element is increased, the one-way valve structure moves, so that the high-pressure through hole and the low-pressure through hole are directly communicated through the bypass channel for pressure relief, one end of the indicating rod can be pushed out of the first plug, thereby prompting maintenance personnel that the bypass is opened, and the filter is maintained in time, so that the maintainability of the filter is greatly improved, and hidden danger and other adverse problems caused by unfiltered oil to the use of accessories at the downstream of the system due to untimely maintenance are avoided.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of the portion A of FIG. 1;

fig. 3 is a schematic structural view of the check valve structure.

In the figure: 1. a bypass housing; 2. a bypass passage; 3. an indication rod; 301. a shoulder block; 4. a first plug; 401. a groove; 402. a sliding sleeve part; 5. a second plug; 6. a one-way valve structure; 601. a valve stem; 602. a valve plug; 603. a return spring; 604. a first limiting member; 605. a limit sleeve; 606. a limiting disc; 607. an inner collar sleeve portion; 7. a filter body; 8. a low pressure via; 9. a high pressure through hole; 10. an indicator; 11. a locking screw sleeve; 12. tightly fixing the screw sleeve; 13. a spring plate; 14. and (5) returning the sealing ring by the spring.

Detailed Description

In the description, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc., the drawings merely correspond to the drawings of the present utility model, and in order to facilitate description of the present utility model, it is not indicated or implied that the device or element referred to must have a specific azimuth:

the filter with the bypass state monitoring function described in connection with fig. 1 comprises a filter body 7 and a bypass housing 1; a bypass channel 2 is arranged in the bypass shell 1, and two ends of the bypass channel 2 are respectively blocked by a first plug 4 and a second plug 5; according to the requirement, the first plug 4 and the second plug 5 are respectively in threaded connection with two ports of the bypass channel 2, so that the disassembly, the assembly and the maintenance are convenient, and sealing gaskets are arranged between the outer walls of the first plug 4 and the second plug 5 and the inner wall of the bypass channel 2 to prevent oil leakage; the bypass channel 2 is provided with a low-pressure through hole 8 and a high-pressure through hole 9 near the channel side walls of the first plug 4 and the second plug 5 respectively, the low-pressure through hole 8 and the high-pressure through hole 9 are correspondingly communicated with the outlet end and the inlet end of the filter body 7 respectively, and the bypass channel 2 and the inlet and outlet channels of the filter body 7 are arranged in parallel to play a standby role;

the bypass channel 2 is internally provided with an indication rod 3 and a one-way valve structure 6 which is positioned at home to block the communication between the low-pressure through hole 8 and the high-pressure through hole 9 and has a reset function, the existing structure of the one-way valve structure 6 is relatively mature, and the one-way valve structure can be turned on unidirectionally when being pressed and reset and blocked when the pressure disappears; the end face of the first plug 4 is provided with a limiting sliding hole which is movably inserted into the indication rod 3 and is in sliding seal with the indication rod 3, so that the indication rod 3 can move flexibly in the axial direction, and is always sealed with the first plug 4 to prevent leakage; the one-way valve structure 6 can be shifted along the bypass channel 2 under the condition that the pressure of the high-pressure through hole 9 is greater than that of the low-pressure through hole 8, so that the low-pressure through hole 8 and the high-pressure through hole 9 are communicated in the bypass shell 1, and the indication rod 3 is pushed to move to be exposed out of the first plug 4, thereby prompting maintenance personnel that bypass is opened, timely maintenance on the filter is needed, greatly improving the maintainability of the filter, and avoiding hidden danger and other adverse problems caused by unfiltered oil to the use of accessories at the downstream of the system due to untimely maintenance; when the pressure difference between the high pressure through hole 9 and the low pressure through hole 8 disappears after maintenance of the filter or is insufficient to open the check valve structure 6, the indication rod 3 can also be manually pushed from the outside, so that the indication rod 3 is also reset to be indicated next time.

As shown in fig. 2, a groove 401 is arranged in the center of the outer end surface of the first plug 4 according to needs, an indicator 10 is arranged in the groove 401, the indicator 10 is hidden and protected in the groove 401, a limiting sliding hole penetrates through the bottom of the groove 401, the outer end of the indicator rod 3 is correspondingly connected with the indicator 10, the indicator can move outwards along with the indicator rod 3, the indicator 10 has a better warning effect relative to the indicator rod 3, and a certain limiting effect is achieved on resetting of the indicator rod 3; in addition, the outer terminal surface central authorities of indicator 10 are equipped with countersunk through-hole, and the outer end pole wall of pilot rod 3 is equipped with first external screw thread, and countersunk through-hole's through-hole inner wall is equipped with the internal thread of adaptation external screw thread, is convenient for the dismouting of indicator 10 and maintains, is equipped with the locking swivel nut 11 with the corresponding spiro union of outer end of pilot rod 3 in countersunk through-hole's the counter bore, prevents that the indicator 10 screw thread from loosening and dropping.

As shown in fig. 2, according to the need, a sliding sleeve part 402 sleeved with the indication rod 3 is integrally arranged on the inner end surface of the first plug 4, sliding sealing is performed between the sliding sleeve part 402 and the indication rod 3 through a spring return sealing ring 14, the rebound tension force of the spring return sealing ring 14 ensures that the spring return sealing ring cannot move along with the indication rod 3 generally, an O-shaped sealing ring can be arranged for improving the sliding sealing effect, a plurality of O-shaped sealing rings can be arranged, and the axial limiting is performed through a plurality of spring return sealing rings 14; in addition, the shaft of the indication rod 3, which is close to the low-pressure through hole 8, is provided with a shoulder block 301, the outer wall of the sliding sleeve part 402 is provided with a second external thread and is in threaded connection with a tight threaded sleeve 12, two elastic sheets 13 are symmetrically arranged on two sides of the sliding sleeve part 402, one end of each elastic sheet 13 is clamped and fixed between the inner end face of the first plug 4 and the tight threaded sleeve 12, the elastic sheets 13 are convenient to disassemble and maintain, the other end of each elastic sheet 13 extends along the axial direction of the indication rod 3, when the elastic sheets approach the shoulder block 301, the elastic sheets are bent to be close to the indication rod 3, then are bent to be far away from the indication rod 3 to form a V-shaped folded end, the minimum distance between the V-shaped folded ends of the two elastic sheets 13 is smaller than the outer diameter of the shoulder block 301, namely, when the shoulder block 301 moves along the indication rod 3 to pass through the V-shaped folded end, the indication rod 3 is required to overcome the deformation force of the elastic sheets 13, no matter the indication rod 3 is exposed or reset, the elastic sheets 3 are required to be moved axially, and the indication rod 3 is prevented from moving axially due to unexpected vibration, so that a safety effect is achieved.

As shown in fig. 3, according to the need, the one-way valve structure 6 comprises a valve rod 601, a valve plug 602 and a return spring 603 sleeved on the shaft of the valve rod 601, a ring boss is arranged on the inner wall of a bypass channel 2 between a low-pressure through hole 8 and a high-pressure through hole 9 in a reducing way, the valve plug 602 is in abutting sealing with one end of the ring boss, which is close to the low-pressure through hole 8, one end of the valve rod 601, which is close to a second plug 5, is connected with a first limiting piece 604, which can be particularly connected through threads, so as to ensure detachable installation, the first limiting piece 604 is in abutting connection with one end of the return spring 603, a limiting sleeve 605 is sleeved on the shaft gap of the valve rod 601, the gap between the limiting sleeve 605 and the valve rod 601 is convenient for fluid circulation, the inner end of the limiting sleeve 605 is folded inwards and is in abutting connection with the other end of the return spring 603, a plurality of through holes are formed in the sleeve wall of the limiting sleeve 605, sufficient flow is ensured through the through holes, the outer end of the limiting sleeve 605 is folded outwards and in abutting against the other end of the ring boss, the other end of the valve rod 601 is in abutting connection with the valve plug 602, which is particularly can be connected through threads, so that the detachable installation can be ensured, the rod end of the rod can also be screwed and positioned through a fixed limiting disc 606; when the valve plug 602 is pressed, the disengaging ring boss moves towards the first plug 4 and pushes the indicating rod 3 to move, at the moment, the reset spring 603 is compressed because the valve rod 601 moves along with the valve plug 602, the low-pressure through hole 8 and the high-pressure through hole 9 are communicated through the bypass channel 2, when the pressure difference disappears, the reset spring 603 rebounds, and the valve rod 601 drives the valve plug 602 to return to abut against the ring boss to seal, so that the bypass channel 2 is blocked; in order to prevent the valve plug 602 from position deviation during moving and resetting, the end face of the valve plug 602 can be integrally connected with a positioning sleeve matched with the inner wall of the annular boss, so that the positioning sleeve is ensured not to be separated from the annular boss, and the valve plug 602 is radially positioned;

according to the requirement, the ring boss is set to be an inner ring sleeve portion 607 and an outer ring sleeve portion which are fixed in a plugging and sealing manner, the outer ring sleeve portion is integrally connected with the bypass shell 1, the valve plug 602 and the limit sleeve 605 respectively correspond to and abut against two ends of the inner ring sleeve portion 607, the inner ring sleeve portion 607 enables the one-way valve structure 6 to be an independent structure, and the one-way valve structure can be installed in the bypass channel 2 after being independently assembled outside.

The utility model has not been described in detail in the prior art, and it is apparent to those skilled in the art that the utility model is not limited to the details of the above-described exemplary embodiments, but that the utility model can be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the above-described embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (10)

1. A filter with bypass state monitoring function is characterized in that: comprises a filter body (7) and a bypass housing (1); a bypass channel (2) is arranged in the bypass shell (1), two ports of the bypass channel (2) are respectively blocked by a first plug (4) and a second plug (5), the side walls of the bypass channel (2) close to the first plug (4) and the second plug (5) are respectively provided with a low-pressure through hole (8) and a high-pressure through hole (9), and the low-pressure through hole (8) and the high-pressure through hole (9) are respectively correspondingly communicated with the outlet end and the inlet end of the filter body (7); be equipped with in bypass passageway (2) pilot rod (3) to and be in normal position and block low pressure through-hole (8) and high pressure through-hole (9) intercommunication and take reset function's check valve structure (6), the terminal surface of first end cap (4) is equipped with adaptation pilot rod (3) activity grafting, and with pilot rod (3) sliding seal's spacing slide hole, check valve structure (6) can receive high pressure through-hole (9) to be greater than the pressure of low pressure through-hole (8) and shift along bypass passageway (2), make low pressure through-hole (8) and high pressure through-hole (9) communicate in bypass casing (1), and promote pilot rod (3) removal and expose outside first end cap (4).

2. The filter with bypass condition monitoring function according to claim 1, wherein: the outer end face center of the first plug (4) is provided with a groove (401), an indicator (10) is arranged in the groove (401), the limiting sliding hole penetrates through the bottom of the groove (401), and the outer end of the indicating rod (3) is correspondingly connected with the indicator (10).

3. The filter with bypass condition monitoring function according to claim 2, characterized in that: the anti-loosening screw sleeve is characterized in that a countersunk through hole is formed in the center of the outer end face of the indicator (10), a first external thread is formed in the outer end rod wall of the indicator rod (3), an internal thread matched with the external thread is formed in the inner wall of the countersunk through hole, and an anti-loosening screw sleeve (11) which is correspondingly screwed with the outer end of the indicator rod (3) is arranged in a counter bore of the countersunk through hole.

4. The filter with bypass condition monitoring function according to claim 1, wherein: the inner end face of the first plug (4) is integrally provided with a sliding sleeve part (402) sleeved with the indication rod (3), and the sliding sleeve part (402) and the indication rod (3) are in sliding sealing through a spring return sealing ring (14).

5. The filter with bypass condition monitoring function according to claim 4, wherein: the utility model discloses a low-pressure gauge is characterized in that a shaft body of an indication rod (3) close to a low-pressure through hole (8) is provided with a shoulder block (301), the outer wall of a sliding sleeve part (402) is provided with a second external thread and is connected with a tight screw sleeve (12) in a screwed mode, two elastic pieces (13) are symmetrically arranged on two sides of the sliding sleeve part (402), one end clamping of each elastic piece (13) is fixed between the inner end face of a first plug (4) and the tight screw sleeve (12), the other end of each elastic piece (13) extends along the axial direction of the indication rod (3), and when the other end approaches to the shoulder block (301), the other end is bent to be close to the indication rod (3) firstly, then bent to be far away from the indication rod (3) to form a V-shaped folded end, and the minimum distance between the V-shaped folded ends of the two elastic pieces (13) is smaller than the outer diameter of the shoulder block (301).

6. The filter with bypass condition monitoring function according to claim 1, wherein: the first plug (4) and the second plug (5) are respectively in threaded connection with two ports of the bypass channel (2), and sealing gaskets are arranged between the outer walls of the first plug (4) and the second plug (5) and the inner wall of the bypass channel (2).

7. The filter with bypass condition monitoring function according to claim 1, wherein: the one-way valve structure (6) comprises a valve rod (601), a valve plug (602) and a reset spring (603) sleeved on the valve rod body of the valve rod (601), a ring boss is arranged on the inner wall of a bypass channel (2) between a low-pressure through hole (8) and a high-pressure through hole (9), the valve plug (602) is in interference seal with one end of the ring boss, which is close to the low-pressure through hole (8), one end of the valve rod (601), which is close to a second plug (5), is connected with a first limiting part (604), one end of the first limiting part (604) is in interference with one end of the reset spring (603), a limit sleeve (605) is sleeved on the rod body clearance sleeve of the valve rod (601), the inner end of the limit sleeve (605) is folded inwards and is in interference with the other end of the reset spring (603), the outer end of the limit sleeve (605) is folded outwards and is in interference with the other end of the ring boss, and the other end of the valve rod (601) is in interference with the other end of the valve rod (602).

8. The filter with bypass condition monitoring function according to claim 7, wherein: the annular boss is arranged to be an inner annular sleeve part (607) and an outer annular sleeve part which are fixed in a plugging and sealing mode, the outer annular sleeve part is integrally connected with the bypass shell (1), and the valve plug (602) and the limit sleeve (605) are respectively in corresponding collision with two ends of the inner annular sleeve part (607).

9. The filter with bypass condition monitoring function according to claim 7, wherein: both ends of the valve rod (601) are respectively in threaded connection with the valve plug (602) and the first limiting piece (604).

10. The filter with bypass condition monitoring function according to claim 7, wherein: the sleeve wall of the limit sleeve (605) is provided with a plurality of flow holes.