CN204007983U - A kind of mechanical differential pressure pickup for fuel filter - Google Patents
A kind of mechanical differential pressure pickup for fuel filter Download PDFInfo
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- CN204007983U CN204007983U CN201420401422.5U CN201420401422U CN204007983U CN 204007983 U CN204007983 U CN 204007983U CN 201420401422 U CN201420401422 U CN 201420401422U CN 204007983 U CN204007983 U CN 204007983U
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- valve rod
- electrode
- differential pressure
- connector
- fuel filter
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Abstract
The utility model provides a kind of mechanical differential pressure pickup for fuel filter, comprises valve rod and the electrode be located in connector, and the end inner sleeve of described valve rod has switch, and the other end of described switch is positioned in the middle of two electrodes and contacts with their ends; The outside of described valve rod is provided with spring, and one end of described spring is connected with the lateral wall of valve rod, the other end is connected with orienting sleeve; The outside of described orienting sleeve is provided with the base for support electrode, and described orienting sleeve and base are all fixedly arranged in connector; The periphery cover that is positioned at the valve rod of junction, high and low pressure chamber has lip-type packing.Between the high and low pressure chamber of machinery differential pressure pickup inside, adopt lip-type packing to be set in valve rod periphery and seal, improved the accuracy of reporting to the police; Between electrode and switch, for some contact, conduction property is good, can not produce permanent strain, and minimizing affects the factor of starting differential pressure, improves its warning sensitivity and accuracy, thereby protects fuel filter better.
Description
Technical field
The utility model relates to sensor technical field, is specifically related to a kind of mechanical differential pressure pickup for fuel filter.
Background technology
Fuel filter on diesel motor in use for some time, the impurity being filtered can build up, and be attached to cartridge surface, make the resistance of filter core become large, as can not be in time it changed or be cleaned, can make the power of engine decline, seriously can cause engine normally not use.But be mainly the subjective judgement that relies on user the period that fuel filter is changed or cleaned, rule of thumb carry out periodically changed or cleaned filter core, it can not judge the congestion situations of fuel oil fitering element exactly, so can cause two kinds of situations: once being that filter core does not arrive and replaced in advance serviceable life, cause unnecessary waste; The 2nd, filter core has arrived serviceable life, and is not changed in time, has influence on the normal work of engine.So judge at present the congestion situations of filter element with mechanical differential pressure pickup, its basis for estimation is poor according to the turnover oil side pressure of filter cleaner, when filter cleaner oil inlet and outlet pressure reduction, reach the warning pressure reduction of differential pressure pickup, machinery differential pressure pickup provides a switching signal to ECU, ECU can remind driver's renew cartridge more in time, can make the life-span of filter core obtain maximum performance use, reduce environmental pollution.
Existing mechanical differential pressure pickup structure as shown in Figure 1, be mainly by electrode 1, valve rod 3, connect the valve block 19 of two electrodes and be located at spring 7, the rubber diaphragm 18 that valve rod 3 outsides are connected with valve rod, and for the back up pad 17 of fixedly rubber diaphragm, spring, spring base 16 etc., but there is following problem in it:
1, warning pressure reduction out of true: it is to determine its starting differential pressure by spring, rubber diaphragm and endoporus roughness, but because very difficult control of precision of rubber diaphragm causes pressure reduction inaccurate;
2, the easy false alarm of poor reliability: owing to being connected by valve block between two electrodes, and the stressed easy generation permanent strain of valve block there will be false alarm after distortion;
3,, owing to being subject to the impact of diesel oil impurity, spring is easily stuck and cause and do not report to the police or false alarm.
Utility model content
The purpose of this utility model is to provide a kind of mechanical differential pressure pickup for fuel filter, improves its functional reliability and vibration resistance.
The technical solution of the utility model is: a kind of mechanical differential pressure pickup for fuel filter, comprise valve rod and the electrode be located in connector, the end inner sleeve of described valve rod has switch, and the other end of described switch is positioned in the middle of two electrodes and contacts with their ends; The outside of described valve rod is provided with spring, and one end of described spring is connected with the lateral wall of valve rod, the other end is connected with orienting sleeve; The outside of described orienting sleeve is provided with the base for support electrode, and described orienting sleeve and base are all fixedly arranged in connector; The periphery cover that is positioned at the valve rod of junction, high and low pressure chamber has lip-type packing.
Further, described electrode is pyramidal structure, the hemispherical dome structure of the end of described switch for matching with electrode tip.
Preferred technical scheme, between described electrode and switch for point contacts.
Further, when ground connection, switch and valve rod are structure as a whole, and its material is metal; When earth-free, switch and valve rod are Split type structure, and the material of valve rod is nonmetallic materials.
The structure that electrode tip is connected with power supply has two kinds, and wherein a kind of structure is: described electrode is arranged in connector, is provided with O-ring seals and seals between electrode and connector; Between described connector and connector, rivet, and its junction is provided with O-ring seals and seals.
Another kind of structure is: described electrode is arranged in electrode tip holder, is provided with O-ring seals and seals between the bottom of electrode and electrode tip holder; Between described electrode tip holder and connector, rivet, and its junction is provided with O-ring seals and seals; The end of described electrode is provided with wiring board, and described wiring board is connected with connector by wire.
Preferably, described wiring board is welded on two electrodes, in described electrode tip holder, is provided with casting glue.
Described wire overcoat has corrugated tube.
Mechanical differential pressure pickup of the present utility model is connected on fuel filter, and its high pressure port A communicates with the oil inlet end (dirty oil) of fuel filter, low-pressure port B communicates with the oil outlet end (absolute oil) of fuel filter; And connect device and be connected with power supply to switch on power and carry out work.When filter cleaner is blocked by well cuts in the course of the work, in the high and low pressure chamber of mechanical differential pressure pickup inside, form pressure reduction, when reaching setting value, pressure reduction can promote the valve rod of lip-shaped sealed ring is housed and drives switch to be moved to the left together, the domed ends of switch is left the tapered end of electrode and is made between two electrodes to disconnect, thereby report to the police, now the ECU of engine starts to point out driver to carry out replacing filter cleaner.
The beneficial effects of the utility model have:
1, between the high and low pressure chamber of mechanical differential pressure pickup inside, adopt lip-type packing to be set in valve rod periphery and seal, due to the good airproof performance of lip-type packing, when low pressure, friction force is little, and can auto-compensation after a small amount of wearing and tearing, long service life; In addition, when high-pressure side oil pressure is larger, its sealing effectiveness is better, thereby has improved the accuracy of reporting to the police.
2, in slipper seal, lip-type packing sealing effectiveness, than the good sealing effect of O type circle, has been avoided causing the poor warning pressure reduction that reaches of oil pressure also can not report to the police because its high and low pressure side oil circuit being communicated after the wearing and tearing of O type circle.
3. the electrode in the utility model adopts pyramidal structure, and O type circle is housed on electrode seals, and has improved its sealing property; In addition, the end of switch is hemisphere form, and between electrode and switch, for some contact, its conduction property is reliable, and minimizing affects the factor of starting differential pressure, improves its warning sensitivity and accuracy, thereby protects better fuel filter; And between electrode and switch, can not produce permanent strain, can not produce false alarm situation.
4. the switch in the utility model is metal material, and valve rod can be metal or nonmetal structure, can be integral structure or split-type structural between them, thereby meets ground connection or earth-free requirement.
5. in the bottom of spring, increase orienting sleeve, make valve rod be positioned at center, hole, valve rod drives switch not setover between two electrodes, improves the precision of starting differential pressure.
6. mechanical differential pressure pickup of the present utility model and power supply link can be changed, and also can adopt wiring board to change connection simultaneously, thereby have improved mechanical differential pressure pickup adaptability.
Accompanying drawing explanation
Fig. 1 is existing mechanical differential pressure pickup structural representation.
Fig. 2 is the first example structure schematic diagram of the present utility model.
Fig. 3 is the second example structure schematic diagram of the present utility model.
In figure: 1-electrode, 2-switch, 3-valve rod, 4-lip-type packing, 5-O type circle, 6-connector, 7-spring, 8-orienting sleeve, 9-base, 10-connector, 11-electrode tip holder, 12-casting glue, 13-corrugated tube, 14-connector, 15-wiring board, 16-spring base, 17-back up pad, 18-rubber diaphragm, 19-valve block, A-high pressure port, B-low-pressure port.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the utility model is further described.
As shown in accompanying drawing 2,3, the high pressure port A of mechanical differential pressure pickup of the present utility model communicates with the oil inlet end of fuel filter (dirty oil), low-pressure port B communicates with the oil outlet end (absolute oil) of fuel filter.When filter cleaner produce to block and while making to produce pressure reduction between mechanical differential pressure pickup high and low pressure chamber, the valve rod that can promote to be equipped with lip-shaped sealed ring drives switch to be moved to the left, and makes between two electrodes to disconnect, and alarm driver carried out replacing filter cleaner.
Be illustrated in figure 2 the first structure for the mechanical differential pressure pickup of fuel filter: valve rod 3 is located in connector 6, electrode 1 is arranged in connector 10, is provided with O-ring seals 5 and seals between electrode 1 and connector 10; Between described connector 10 and connector 6, rivet, and its junction is provided with O-ring seals and seals;
Switch 2 is sheathed on the inside of valve rod 3, and the other end of switch 2 is positioned in the middle of two electrodes 1 and contacts with their ends; The outside of described valve rod 3 is provided with spring 7, and one end of described spring 7 is connected with the lateral wall of valve rod 3, the other end is connected with orienting sleeve 8; The outside of described orienting sleeve 8 is provided with the base 9 for support electrode 1, and described orienting sleeve 8 is all fixedly arranged in connector 6 with base 9; The periphery cover that is positioned at the valve rod 3 of junction, high and low pressure chamber has lip-type packing 4.
Further, described electrode 1 is pyramidal structure, and the end of switch 2 is the hemispherical dome structure that matches with electrode 1 end, between electrode 1 and switch 2, for putting, contacts.
Further, when ground connection, switch 2 is structure as a whole with valve rod 3, and its material is metal; When earth-free, switch 2 is Split type structure with valve rod 3, and the material of valve rod is nonmetallic materials.
Be illustrated in figure 3 the mechanical differential pressure pickup the second structure for fuel filter: valve rod 3 is located in connector 6, and electrode 1 is arranged in electrode tip holder 11, is provided with O-ring seals 5 and seals between electrode 1 and electrode tip holder 11; Between described electrode tip holder 11 and connector 6, rivet, and its junction is provided with O-ring seals and seals; The end of two electrodes 1 is welded with wiring board 15, and described wiring board 15 is connected with connector 14 by wire, is provided with casting glue 12 in electrode tip holder 11, and wire overcoat has corrugated tube 13.
Switch 2 is sheathed on the inside of valve rod 3, and the other end of switch 2 is positioned in the middle of two electrodes 1 and contacts with their ends; The outside of described valve rod 3 is provided with spring 7, and one end of described spring 7 is connected with the lateral wall of valve rod 3, the other end is connected with orienting sleeve 8; The outside of described orienting sleeve 8 is provided with the base 9 for support electrode 1, and described orienting sleeve 8 is all fixedly arranged in connector 6 with base 9; The periphery cover that is positioned at the valve rod 3 of junction, high and low pressure chamber has lip-type packing 4.
Further, described electrode 1 is pyramidal structure, and the end of switch 2 is the hemispherical dome structure that matches with electrode 1 end, between electrode 1 and switch 2, for putting, contacts.
Further, when ground connection, switch 2 is structure as a whole with valve rod 3, and its material is metal; When earth-free, switch 2 is Split type structure with valve rod 3, and the material of valve rod is nonmetallic materials.
Above embodiment is not limited only to protection domain of the present utility model, all based on basic thought of the present utility model, modify or change all belong to protection domain of the present utility model.
Claims (8)
1. the mechanical differential pressure pickup for fuel filter, comprise valve rod (3) and the electrode (1) be located in connector (6), it is characterized in that: the end inner sleeve of described valve rod (3) has switch (2), the other end of described switch (2) is positioned in the middle of two electrodes (1) and contacts with their ends; The outside of described valve rod (3) is provided with spring (7), and one end of described spring (7) is connected with the lateral wall of valve rod (3), the other end is connected with orienting sleeve (8); The outside of described orienting sleeve (8) is provided with the base (9) for support electrode (1), and described orienting sleeve (8) is all fixedly arranged in connector (6) with base (9); The periphery cover that is positioned at the valve rod (3) of junction, high and low pressure chamber has lip-type packing (4).
2. a kind of mechanical differential pressure pickup for fuel filter according to claim 1, is characterized in that: described electrode (1) is pyramidal structure the hemispherical dome structure of the end of described switch (2) for matching with electrode (1) end.
3. a kind of mechanical differential pressure pickup for fuel filter according to claim 1 and 2, is characterized in that: between described electrode (1) and switch (2) for point contacts.
4. a kind of mechanical differential pressure pickup for fuel filter according to claim 1, is characterized in that: when ground connection, switch (2) is structure as a whole with valve rod (3), and its material is metal; When earth-free, switch (2) is Split type structure with valve rod (3), and the material of valve rod is nonmetallic materials.
5. a kind of mechanical differential pressure pickup for fuel filter according to claim 1, is characterized in that: described electrode (1) is arranged in connector (10), electrode (1) and connector (10) between be provided with O-ring seals (5) and seal; Between described connector (10) and connector (6), rivet, and its junction is provided with O-ring seals and seals.
6. a kind of mechanical differential pressure pickup for fuel filter according to claim 1, it is characterized in that: described electrode (1) is arranged in electrode tip holder (11), between the bottom of electrode (1) and electrode tip holder (11), be provided with O-ring seals (5) and seal; Between described electrode tip holder (11) and connector (6), rivet, and its junction is provided with O-ring seals and seals; The end of described electrode (1) is provided with wiring board (15), and described wiring board (15) is connected with connector (14) by wire.
7. a kind of mechanical differential pressure pickup for fuel filter according to claim 6, is characterized in that: it is upper that described wiring board (15) is welded on two electrodes (1), is provided with casting glue (12) in described electrode tip holder (11).
8. a kind of mechanical differential pressure pickup for fuel filter according to claim 6, is characterized in that: described wire overcoat has corrugated tube (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420401422.5U CN204007983U (en) | 2014-07-21 | 2014-07-21 | A kind of mechanical differential pressure pickup for fuel filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420401422.5U CN204007983U (en) | 2014-07-21 | 2014-07-21 | A kind of mechanical differential pressure pickup for fuel filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204007983U true CN204007983U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420401422.5U Active CN204007983U (en) | 2014-07-21 | 2014-07-21 | A kind of mechanical differential pressure pickup for fuel filter |
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| Country | Link |
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| CN (1) | CN204007983U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111198064A (en) * | 2018-11-16 | 2020-05-26 | 雅玛信过滤器株式会社 | Differential pressure detection device |
-
2014
- 2014-07-21 CN CN201420401422.5U patent/CN204007983U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111198064A (en) * | 2018-11-16 | 2020-05-26 | 雅玛信过滤器株式会社 | Differential pressure detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HEFEI WAL FUEL SYSTEM CO., LTD. Free format text: FORMER NAME: WAL FUEL SYETEMS (HEFEI) LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 230601 No. 59 Buddha Road, Hefei economic and Technological Development Zone, Anhui, China Patentee after: Hefei Weir oil-fired system limited company Address before: 230601 No. 59 Buddha Road, Hefei economic and Technological Development Zone, Anhui, China Patentee before: WAL Fuel Syetems (Hefei) Ltd. |
|
| CP03 | Change of name, title or address |
Address after: 230000 No. 59 Buddha Road, Hefei economic and Technological Development Zone, Anhui Patentee after: Anhui Weil Low Carbon Technology Co., Ltd Address before: 230601 No. 59 Buddha Road, Hefei economic and Technological Development Zone, Anhui, China Patentee before: Hefei Weir oil-fired system limited company |
|
| CP03 | Change of name, title or address |