CN111577495A - Low-response diesel electric switch valve with double oil tanks completely isolated from air - Google Patents
Low-response diesel electric switch valve with double oil tanks completely isolated from air Download PDFInfo
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- CN111577495A CN111577495A CN202010277842.7A CN202010277842A CN111577495A CN 111577495 A CN111577495 A CN 111577495A CN 202010277842 A CN202010277842 A CN 202010277842A CN 111577495 A CN111577495 A CN 111577495A
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- air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0076—Details of the fuel feeding system related to the fuel tank
- F02M37/0088—Multiple separate fuel tanks or tanks being at least partially partitioned
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0023—Valves in the fuel supply and return system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0076—Details of the fuel feeding system related to the fuel tank
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention discloses a low-response diesel electric switch valve for double oil tanks, which is completely isolated from air, belongs to the technical field of on-off control of oil supply system pipelines for the double oil tanks of a diesel vehicle, and aims to design a low-response diesel electric switch valve for the double oil tanks, which is completely isolated from air, and realize automatic selection and switching of the two oil tanks without user operation. A low-response diesel electric switch valve with double oil tanks completely isolated from air comprises a valve body, a sealing plunger, a diaphragm, a retainer ring, a transmission shaft, a bearing and a motor, wherein the transmission shaft is driven by an electrode to rotate to drive a sealing plunger 2 to move up and down so as to seal an oil inlet and outlet channel, and the response is quick. The automatic on-off of the oil supply system pipeline on the premise of full air isolation is realized.
Description
Technical Field
The invention belongs to the technical field of on-off control of oil supply system pipelines for double oil tanks of a diesel vehicle, and particularly relates to a low-response diesel electric switch valve which is used for the double oil tanks and is completely isolated from air.
Background
The temperature difference between south and north of China is large, and the temperature in south is above zero and the temperature in north is below zero in spring and autumn; the tractor for running and transporting in the south and north can run in the subzero and subzero areas, the subzero area in the north needs to use minus diesel oil, and the subzero area in the south needs to use zero diesel oil; therefore, such vehicles are generally equipped with two fuel tanks, which are filled with minus diesel fuel and zero diesel fuel, respectively.
The traditional vehicle double-oil-tank system is provided with a mechanical switch on-off valve in the pipelines of two oil tanks, and the on-off of the pipelines between the two oil tanks is controlled through manual operation, so that the use of negative diesel oil in a zero environment is ensured, and the use of zero diesel oil in a zero environment is ensured. The valve needs manual operation of a driver for parking and getting off, and the vehicle running on the highway is not changed and dangerous, so that inconvenience is brought to the user.
The conventional electric switch valve for the diesel vehicle generally has a relatively high response speed, and the electric valve with the response level has high requirements on application conditions such as cleanliness and the like within a millisecond level; the response speed of an electric switch on-off valve for a diesel vehicle oil supply system is not too high, and can be within a second level, and meanwhile, the cleanliness of diesel oil is not good before a diesel oil filter. The application environment characteristics of the diesel vehicle oil supply system are contradictory to the application requirements of the conventional vehicle electric switch valve.
The conventional switch on-off valve generally adopts sealing elements such as O-shaped rings or oil seals to seal and isolate an oil way and outside air, and the sealing elements are worn to cause the risk of sealing failure in long-term use, so that air enters the oil way. The design life of a diesel vehicle is more than 80 km and is generally used for more than 10 years, so that the switch valve used on the diesel vehicle has to solve the problem of sealing failure caused by abrasion. The oil supply system of the diesel vehicle adopts the oil delivery pump to pump oil under negative pressure, and the system is particularly sensitive to air leakage, the condition of insufficient power can occur in a slightly air-leaked engine, and the condition of incapability of starting or automatic flameout can occur in a seriously air-leaked engine, so that the problem of air entering must be solved by a switch valve used on the diesel vehicle.
Disclosure of Invention
In view of the above problems, the present invention is to design a low-response diesel electric switch valve for dual fuel tanks, which is fully isolated from air, and which does not require user operation to realize automatic selection and switching of two fuel tanks. When the ambient temperature is higher than-4 ℃, one path of the switching valve is conducted; when the ambient temperature is lower than 4 ℃ above zero, the other path of the switching valve is conducted. The air and the diesel oil are completely isolated by the diaphragm, and the risk that the air enters the diesel oil is avoided.
GB19147 stipulates that zero diesel oil is used at the ambient temperature of above-zero 4 ℃, so the use amount of negative diesel oil can be saved to the maximum extent by setting the valve switching temperature limit value to be above-zero 4 ℃, and the use cost of diesel oil for users can be reduced because the negative diesel oil is expensive.
The technical scheme of the invention is realized as follows:
a low-response diesel electric switch valve with double oil tanks completely isolated from air comprises a valve body 1, a sealing plunger 2, a diaphragm 3, a retainer ring 4, a transmission shaft 5, a bearing 6 and a motor 7.
The valve body 1 is provided with an oil inlet channel 1.1 and an oil outlet channel 1.2. The bottom end of the sealing plunger 2 is arranged between the oil inlet channel 1.1 and the oil outlet channel 1.2 to separate the oil inlet channel and the oil outlet channel; the lower part of the transmission shaft 5 is connected with the upper end of the sealing plunger 2 through threads, and the upper part of the transmission shaft 5 is fixed through a bearing 6 and is connected with a motor 7; the diaphragm 3 is arranged on the sealing plunger 2, the edge of the diaphragm is fixed on the valve body 1, and the interior of the valve body 1 is divided into an upper part and a lower part; the retainer ring 4 is arranged on the diaphragm 3 to seal the interior of the valve body; the oil outlet channel 1.2 is provided with a pressure balance hole 1.3.
Specifically, the transmission shaft 5 is provided with a thread tooth 5.1 and a thread groove 5.2 which are matched with a threaded hole in the center of the sealing plunger 2;
the top arcs of the oil inlet channel 1.1 and the top arcs of the oil outlet channel 1.2 are parallel, and the drift diameter of the oil outlet channel 1.2 is larger than that of the oil inlet channel 1.1; preferably, the channel 1.1 has a diameter Φ 8mm and the channel 1.2 has a diameter Φ 12 mm.
The bottom end of the sealing plunger 2 exceeds the bottom arc of the channel 1.1 by 2mm, so that the tightness of the channel 1.1 is ensured.
Preferably, the height of the thread tooth 5.1 on the transmission shaft 5 is 1mm, the height of the thread groove 5.2 is 1mm, and the thread tooth 5.1 and the thread groove 5.2 are both rectangular; the uppermost thread of the transmission shaft 5 is 10mm away from the top end of the retainer ring 4.
Preferably, the diameter of the pressure equalizing hole 1.3 is Φ 3 mm.
The motor 7 can rotate in the forward direction and the reverse direction, and the rotating speed is 3 circles/second, so that the moving speed of the sealing plunger 2 is 6 mm/s.
The invention has the beneficial effects that:
when the environment temperature is higher than-4 ℃, the electric switch valve in the zero-number oil tank pipeline is opened, and the electric switch valve in the negative-number oil tank pipeline is closed, so that the zero-number diesel oil is supplied to the engine. When the environmental temperature is lower than 4 ℃ above zero, the electric switch valve in the zero-number oil tank pipeline is closed, and the electric switch valve in the negative-number oil tank pipeline is opened, so that the negative-number diesel oil is supplied to the engine.
Drawings
Fig. 1 is a low-response diesel electric switch valve for a dual fuel tank of the present invention, which is completely isolated from air.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
A low-response diesel electric switch valve with double oil tanks completely isolated from air comprises a valve body 1, a sealing plunger 2, a diaphragm 3, a retainer ring 4, a transmission shaft 5, a bearing 6 and a motor 7. The valve body 1 is provided with a channel 1.1, a channel 1.2 and a pressure balance hole 1.3. The transmission shaft 5 is provided with a thread tooth 5.1 and a thread groove 5.2.
The liquid flow direction flows from channel 1.1 to channel 1.2, and no reverse flow is allowed. The flow of the diesel oil supply system is 500L/h, and in order to ensure the flow resistance under the flow, the drift diameter of the channel 1.1 is phi 8 mm. When the switch valve is opened, in order to ensure that the oil pressure in the channel 1.1 is quickly released, the drift diameter of the channel 1.2 is phi 12 mm.
The top arc of the channel 1.1 is equal to the top arc of the channel 1.2, so that the bottom arc of the channel 1.1 is 4mm higher than the bottom arc of the channel 1.2. When the switch valve is in a closed state, the distance between the bottom end of the sealing plunger 2 and the bottom arc of the channel 1.2 is 2mm, and the channel 1.2 is low pressure, so that the axial direction of the plunger 2 is not pressurized by upward diesel oil in the space of 2mm, the friction force of thread teeth can be reduced, and the torque force requirement of the motor 7 is further reduced. The bottom end of the sealing plunger 2 exceeds the bottom arc of the channel 1.1 by 2mm, and the 2mm ensures the tightness of the channel 1.1.
In order to ensure that the pressures above and below the membrane 3 are basically equivalent, the pressure balance hole 1.3 communicates the space below the membrane with the channel 1.2, and the channel 1.2 is low pressure and basically equal to atmospheric pressure; due to the influence of the surface tension of the liquid, the diameter of the pressure balance hole 1.3 between phi 1mm and phi 2mm can cause unsmooth pressure transmission due to the blockage of the hole by the surface tension of the diesel oil, so the diameter of the pressure balance hole 1.3 is set to be phi 3 mm.
The height of the thread teeth 5.1 on the transmission shaft 5 is 1mm, and the height of the thread grooves 5.2 is 1 mm. The thread tooth 5.1 and the thread groove 5.2 are both rectangular in shape, so that the tooth profile can withstand large axial forces. When the switch valve is in a closed state, the uppermost thread of the transmission shaft 5 is 10mm away from the top end of the retainer ring 4, and the 10mm ensures the movement stroke of the sealing plunger 2.
The motor 7 can rotate in forward and reverse directions, the rotating speed is 3 circles/second, the moving speed of the sealing plunger 2 is 6mm/s, and therefore the opening and closing response time of the switch valve is 1.67 s.
The diaphragm 3 and the sealing plunger 2 are molded into a whole, the diaphragm 3 is pressed on the valve body 1 by the retainer ring 4, and a closed space is formed below the diaphragm 3 and the valve body 1 and is completely isolated from the outside air.
The bearing 6 up end and motor 7 contact, bearing 6 lower extreme face and transmission shaft 5 contact, and bearing 6 does not transmit the axial force of transmission shaft 5 inside motor 7 for the shell body of motor 7, transmission shaft 5. When the transmission shaft 5 rotates, the bearing 6 can reduce the rotation friction force between the transmission shaft 5 and the motor 7.
Example (b):
as shown in fig. 1, when the switch valve needs to be opened, the motor 7 rotates forward, the transmission shaft 5 rotates 5 circles to lift the sealing plunger 2 by 10mm through threads, and the channel 1.1 is communicated with the channel 1.2; when the switch valve needs to be closed, the motor 7 rotates reversely, the transmission shaft 5 rotates 5 circles to drop the sealing plunger 2 by 10mm through threads, and the channel 1.1 and the channel 1.2 are closed.
Claims (9)
1. A low-response diesel electric switch valve with full air isolation for double oil tanks is characterized by comprising: the valve comprises a valve body (1), a sealing plunger (2), a diaphragm (3), a retainer ring (4), a transmission shaft (5), a bearing (6) and a motor (7);
an oil inlet channel (1.1) and an oil outlet channel (1.2) are arranged on the valve body (1). The bottom end of the sealing plunger (2) is arranged between the oil inlet channel (1.1) and the oil outlet channel (1.2) and can separate the oil inlet channel from the oil outlet channel; the lower part of the transmission shaft (5) is connected with the upper end of the sealing plunger (2) through threads, and the upper part of the transmission shaft (5) is fixed through a bearing (6) and is connected with a motor (7); the diaphragm (3) is arranged on the sealing plunger (2), the edge of the diaphragm is fixed on the valve body (1), and the interior of the valve body (1) is divided into an upper part and a lower part; the retainer ring (4) is arranged on the diaphragm (3) to seal the interior of the valve body; the oil outlet channel (1.2) is provided with a pressure balance hole (1.3).
2. The air-tight low-response diesel electric switch valve for double fuel tanks according to claim 1, characterized in that the drive shaft (5) has a thread tooth (5.1) and a thread groove (5.2) which are engaged with a threaded hole in the center of the sealing plunger (2).
3. The air-isolated low-response diesel electric switch valve for the double oil tanks according to claim 1, characterized in that the top arcs of the oil inlet channel (1.1) and the oil outlet channel (1.2) are flat, and the drift diameter of the oil outlet channel (1.2) is larger than that of the oil inlet channel (1.1).
4. The air-insulated low-response diesel electric switch valve for the double oil tanks according to claim 3, characterized in that the drift diameter of the oil inlet channel (1.1) is 8mm, and the drift diameter of the oil outlet channel (1.2) is 12 mm.
5. The low-response diesel electric switch valve for double fuel tanks totally isolated from air according to claim 4, characterized in that the bottom end of the sealing plunger (2) exceeds the bottom arc of the channel (1.1) by 2 mm.
6. The air-insulated low-response diesel electric switch valve for the double fuel tank according to claim 2, wherein the height of the thread tooth (5.1) on the transmission shaft (5) is 1mm, the height of the thread groove (5.2) is 1mm, and the thread tooth (5.1) and the thread groove (5.2) are both rectangular.
7. The air-tight low-response diesel electric switch valve for a dual fuel tank according to claim 6, wherein the uppermost thread of the driving shaft (5) is spaced 10mm from the top of the retainer (4).
8. The low-response diesel electric switch valve for double fuel tanks totally isolated from air according to claim 4, characterized in that the diameter of the pressure balancing hole (1.3) is 3 mm.
9. The air-insulated low-response diesel electric switch valve for double fuel tanks according to claim 7, characterized in that the motor (7) can rotate in both forward and reverse directions at a rotation speed of 3 revolutions per second, so that the movement speed of the sealing plunger (2) is 6 mm/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010277842.7A CN111577495A (en) | 2020-04-10 | 2020-04-10 | Low-response diesel electric switch valve with double oil tanks completely isolated from air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010277842.7A CN111577495A (en) | 2020-04-10 | 2020-04-10 | Low-response diesel electric switch valve with double oil tanks completely isolated from air |
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| Publication Number | Publication Date |
|---|---|
| CN111577495A true CN111577495A (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010277842.7A Pending CN111577495A (en) | 2020-04-10 | 2020-04-10 | Low-response diesel electric switch valve with double oil tanks completely isolated from air |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6321776B1 (en) * | 2000-04-24 | 2001-11-27 | Wayne L. Pratt | Double diaphragm precision throttling valve |
| CN2510677Y (en) * | 2001-10-23 | 2002-09-11 | 朱建 | Blocking-free, low-power-consumption, high-reliable, IC card gas meter motor-driving valve |
| JP2005054954A (en) * | 2003-08-07 | 2005-03-03 | Tokyo Keiso Co Ltd | Control valve |
| CN2775414Y (en) * | 2005-03-02 | 2006-04-26 | 重庆明光燃气设备有限公司 | Linear step motor control valve for gas meter |
| CN103925399A (en) * | 2014-05-07 | 2014-07-16 | 西安交通大学 | Diaphragm-type pneumatic proportional pressure reducing valve of edge cam driven by servo motor directly |
| CN105889588A (en) * | 2016-04-21 | 2016-08-24 | 杭州艾诺流体控制仪表有限公司 | Lining fluorine self-operated double-seat pressure adjusting valve |
| CN207762260U (en) * | 2018-01-17 | 2018-08-24 | 西南大学 | A kind of unidirectional autocontrol valve |
| CN209414719U (en) * | 2018-12-20 | 2019-09-20 | 中国化学工业桂林工程有限公司 | A kind of relief valve of material-compound tank |
-
2020
- 2020-04-10 CN CN202010277842.7A patent/CN111577495A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6321776B1 (en) * | 2000-04-24 | 2001-11-27 | Wayne L. Pratt | Double diaphragm precision throttling valve |
| CN2510677Y (en) * | 2001-10-23 | 2002-09-11 | 朱建 | Blocking-free, low-power-consumption, high-reliable, IC card gas meter motor-driving valve |
| JP2005054954A (en) * | 2003-08-07 | 2005-03-03 | Tokyo Keiso Co Ltd | Control valve |
| CN2775414Y (en) * | 2005-03-02 | 2006-04-26 | 重庆明光燃气设备有限公司 | Linear step motor control valve for gas meter |
| CN103925399A (en) * | 2014-05-07 | 2014-07-16 | 西安交通大学 | Diaphragm-type pneumatic proportional pressure reducing valve of edge cam driven by servo motor directly |
| CN105889588A (en) * | 2016-04-21 | 2016-08-24 | 杭州艾诺流体控制仪表有限公司 | Lining fluorine self-operated double-seat pressure adjusting valve |
| CN207762260U (en) * | 2018-01-17 | 2018-08-24 | 西南大学 | A kind of unidirectional autocontrol valve |
| CN209414719U (en) * | 2018-12-20 | 2019-09-20 | 中国化学工业桂林工程有限公司 | A kind of relief valve of material-compound tank |
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Application publication date: 20200825 |
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