Liquid extraction valve with overflow function

Abstract

The utility model provides a liquid extraction valve with an overflow function, and belongs to the technical field of mixed fuel supply devices of fuel engines, the liquid extraction valve comprises a valve body, and a control cavity, a negative pressure cavity and a high pressure oil cavity are formed in the valve body; the bottom of the control cavity communicates with the side wall of the negative pressure cavity, and the bottom of the negative pressure cavity communicates with the high-pressure oil cavity. The reversing valve is arranged in the control cavity and can move along the axis of the control cavity; the overflow channel is communicated with the control cavity, and the communicated position of the overflow channel and the control cavity is located at the bottom of the first section of cavity body of the control cavity; the oil inlet channel upwards extends out of the first through hole of the control cavity; the oil outlet channel is communicated with the negative pressure cavity; and the high-pressure oil channel is communicated with the high-pressure oil cavity. Gasoline can be transferred from the auxiliary fuel tank to the main fuel tank, and when the main fuel tank is full of fuel, except for an independent overflow valve between the main fuel tank and the auxiliary fuel tank, the fuel can flow back to the main fuel tank through the valve body.

Description

Technical Field

[0001] The utility model belongs to the technical field of a mixed fuel supply device of a fuel engine, and in particular relates to a liquid pumping valve with an overflow function. Background Art

[0002] In order to increase the driving range, some cars are equipped with two fuel tanks: a main tank and a secondary tank. The main tank is responsible for supplying fuel to the engine, and the secondary tank uses a fuel pump to refill the fuel in the tank into the main tank. When the fuel in the main tank is about to run out, the driver starts the fuel pump to refill the main tank. This method requires not only changes to the vehicle's circuit system due to the addition of a fuel pump;

[0003] And because of the addition of power equipment, the power equipment is prone to failure.

[0004] In the prior art, there is a pumping valve that uses the high-pressure liquid provided by the oil pump of the car (this oil pump is the oil pump for the engine fuel supply) to provide power for the gasoline in the auxiliary tank to enter the main tank, such as the pumping valve disclosed in patent document CN217712779U. In the technical solution of using the pumping valve of the prior art to supply the gasoline in the auxiliary tank to the main tank, the state of the main tank being full of oil still maintains the state of the oil in the auxiliary tank entering the main tank, which places high requirements on the overflow pipe set between the main tank and the auxiliary tank. A slightly larger bending radius of the overflow pipe will directly affect the overflow speed. On the other hand, the overflow pipe set by the main tank and the auxiliary tank bears the overflow demand when the main tank is full of oil, and the overflow is single, which increases the probability of problems in the oil supply system. Utility Model Content

[0005] To this end, the utility model provides a liquid pumping valve with an overflow function to solve the above technical problems.

[0006] The technical solution of the utility model to solve the above problems is as follows:

[0007] A liquid extraction valve with overflow function, comprising:

[0008] The valve body is provided with a control chamber, a negative pressure chamber and a high-pressure oil chamber inside; the bottom of the control chamber is connected to the side wall of the negative pressure chamber, and the bottom of the negative pressure chamber is connected to the high-pressure oil chamber; the control chamber includes a first section of the cavity, the bottom of the first section of the cavity is provided with a second section of the cavity, the inner diameter of the second section of the cavity is smaller than the inner diameter of the first section of the cavity, and the top of the first section of the cavity is provided with a first through hole;

[0009] A reversing valve is arranged in the control cavity and can move along the axis of the control cavity; the reversing valve comprises: a first valve body, the outer diameter of the first valve body is equal to the inner diameter of the first cavity of the control cavity, and the first valve body has a conical bottom; a second valve body is located at the upper part of the first valve body, and the diameter of the second valve body is equal to the aperture of the first through hole, and the second valve body is located in the first through hole; a second through hole is arranged on the reversing valve, the axis of which is parallel to the axis of the control cavity;

[0010] An overflow channel communicates with the control chamber, and the position where the two communicate is located at the bottom of the first section of the control chamber;

[0011] An oil inlet passage extending upward from the first through hole of the control chamber;

[0012] An oil outlet channel communicated with the negative pressure chamber;

[0013] A high-pressure oil channel is communicated with the high-pressure oil chamber.

[0014] In a preferred embodiment, the bottom diameter of the reversing valve is smaller than the inner diameter of the second section of the control chamber.

[0015] In a preferred embodiment, when the reversing valve is at the highest position in the control chamber, the top surface of the second valve body is in contact with the top surface of the oil inlet passage.

[0016] In a preferred embodiment, a third through hole communicating with the control chamber is provided on the valve body, and a blocking cover is provided in the third through hole; the blocking cover comprises:

[0017] A cover bottom, serving as the top of the first section of the cavity, wherein the first through hole is arranged on the cover bottom;

[0018] A cover cylinder connected to the upper surface of the cover bottom, the inner diameter of the cover cylinder is equal to the diameter of the first through hole, a fourth through hole whose axis is not parallel to the axis of the first through hole is further arranged on the cylinder wall of the cover cylinder, and the space inside the cover cylinder is a part of the oil inlet passage;

[0019] The cover top is connected to the upper surface of the cover tube and is located in the third through hole.

[0020] In a preferred embodiment, the bottom of the control chamber is connected to the side wall of the negative pressure chamber through a plurality of transition chambers, and the diameter of the transition chamber gradually decreases from the second section of the chamber to the negative pressure chamber.

[0021] In a preferred embodiment, the bottom of the negative pressure chamber is connected to the high-pressure oil chamber via a fifth through hole, and the diameter of the fifth through hole is much smaller than the inner diameter of the high-pressure oil chamber.

[0022] In a preferred embodiment, the bottom of the negative pressure chamber is a conical bottom protruding into the chamber, and the five through holes are located at the center of the conical bottom.

[0023] In a preferred embodiment, the inlet end of the oil outlet channel is located at the bottom of the negative pressure chamber.

[0024] In a preferred embodiment, the inlet end of the oil outlet channel is funnel-shaped and the end surface close to the inlet is larger, and the inlet end of the oil outlet channel is sleeved outside the conical bottom of the negative pressure chamber.

[0025] In a preferred embodiment, the gap between the inner wall surface of the inlet end of the oil outlet channel and the conical bottom of the negative pressure chamber is 1 to 3 times the inner diameter of the fifth through hole.

[0026] The present application provides a liquid pumping valve with an overflow function, comprising a valve body, in which a control chamber, a negative pressure chamber and a high-pressure oil chamber are arranged; the bottom of the control chamber is connected to the side wall of the negative pressure chamber, and the bottom of the negative pressure chamber is connected to the high-pressure oil chamber; the control chamber comprises a first section of the chamber, the bottom of the first section of the chamber is provided with a second section of the chamber, the inner diameter of the second section of the chamber is smaller than the inner diameter of the first section of the chamber, and a first through hole is arranged at the top of the first section of the chamber; a reversing valve is arranged in the control chamber and can move along the axis of the control chamber; the reversing valve comprises: a first section of the valve body, the outer diameter of the first section of the valve body is the same as the outer diameter of the first section of the chamber The inner diameters of the cavities are equal, and the first valve body has a conical bottom; the second valve body is located at the upper part of the first valve body, and the diameter of the second valve body is equal to the aperture of the first through hole, and the second valve body is located in the first through hole; the reversing valve is provided with a second through hole whose axis is parallel to the axis of the control cavity; the overflow channel is communicated with the control cavity, and the position where the two communicate is located at the bottom of the first cavity of the control cavity; the oil inlet channel extends upward from the first through hole of the control cavity; the oil outlet channel is communicated with the negative pressure cavity; the high-pressure oil channel is communicated with the high-pressure oil cavity. When in use, the overflow channel is connected to the overflow pipe of the main oil tank, and when the main oil tank is full of gasoline, the gasoline enters the valve body from here; the oil inlet channel is connected to the auxiliary oil tank, and the gasoline in the auxiliary oil tank flows into the valve body through the oil inlet channel; the high-pressure oil channel is connected to the original vehicle high-pressure oil pipe; the oil outlet channel is connected to the main oil tank, and is the interface for the gasoline in the auxiliary oil tank to flow into the main oil tank under the action of the liquid extraction valve. The pumping valve provided in the present application can realize the transfer of gasoline from the auxiliary tank to the main tank, and when the main tank is full, in addition to a separate overflow valve between the main tank and the auxiliary tank, the fuel can flow back to the main tank through the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0028] Figure 1 A schematic diagram of the structure of the valve body provided in Example 1;

[0029] Figure 2 Schematic diagram of the structure of the pumping valve when gasoline is transferred from the auxiliary tank to the main tank in Example 1;

[0030] Figure 3 It is a structural schematic diagram of the liquid extraction valve in Example 1 when gasoline overflows from the main fuel tank to the valve body and then flows back to the main fuel tank;

[0031] Figure 4 This is a structural schematic diagram of the valve body and pipeline interface connection method provided in Example 1. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0033] Example 1

[0034] This embodiment provides a liquid pumping valve with overflow function, referring to Figures 1 to 4 ,Include:

[0035] The valve body 100 is provided with a control chamber 3, a negative pressure chamber 5 and a high pressure oil chamber 7 inside; the bottom of the control chamber 3 is connected to the side wall of the negative pressure chamber 5, and the bottom of the negative pressure chamber 5 is connected to the high pressure oil chamber 7; the control chamber 3 includes a first section cavity 31, a second section cavity 32 is provided at the bottom of the first section cavity 31, the inner diameter of the second section cavity 32 is smaller than the inner diameter of the first section cavity 31, and a first through hole 105 is provided at the top of the first section cavity 31;

[0036] The reversing valve 9 is arranged in the control chamber 3 and can move along the axis of the control chamber 3; the reversing valve 9 comprises: a first valve body 92, the outer diameter of the first valve body 92 is equal to the inner diameter of the first cavity 31 of the control chamber 3, and the first valve body 92 has a conical bottom; a second valve body 91 is located at the upper part of the first valve body 92, and the diameter of the second valve body 92 is equal to the aperture of the first through hole 105, and the second valve body 92 is located in the first through hole 105; the reversing valve 9 is provided with a second through hole 93 whose axis is parallel to the axis of the control chamber 3;

[0037] The overflow channel 8 is communicated with the control chamber 3, and the position where the two communicate is located at the bottom of the first section of the cavity 31 of the control chamber 3;

[0038] The oil inlet passage 2 extends upward from the first through hole 105 of the control chamber 3;

[0039] The oil outlet channel 11 is connected to the negative pressure chamber 5;

[0040] The high-pressure oil passage 12 is communicated with the high-pressure oil chamber 7 .

[0041] When in use, the overflow channel 8 of the liquid extraction valve is connected to the overflow pipe of the main fuel tank of the vehicle. When the main fuel tank is full of gasoline, the gasoline enters the valve body 100 from here; the oil inlet channel 2 is connected to the auxiliary fuel tank of the vehicle, and the gasoline in the auxiliary fuel tank flows into the valve body 100 through the oil inlet channel 2; the high-pressure oil channel 12 is connected to the original vehicle's high-pressure oil pipe; the oil outlet channel 11 is connected to the main fuel tank, and is the interface for the gasoline in the auxiliary fuel tank to flow into the main fuel tank under the action of the liquid extraction valve.

[0042] When the gasoline in the main tank is insufficient, the reversing valve 9 falls to the bottom of the control chamber 3, and the gasoline in the auxiliary tank flows into the second through hole 93 provided on the reversing valve 9 through the oil inlet channel 2 and reaches the bottom of the control chamber 3. At this time, the liquid in the pumping valve flows in the direction of reference Figure 2 :

[0043] The high-pressure gasoline from the original high-pressure oil pipe is injected into the high-pressure oil chamber 7. The oil outlet diameter of the high-pressure oil chamber 7 is less than 1mm. When the high-pressure gasoline passes through this place, the gasoline flow rate is greatly increased;

[0044] High-pressure and high-speed gasoline enters the negative pressure chamber 5, forming a large negative pressure area at the bottom of the negative pressure chamber 5;

[0045] The pressure in the control chamber 3 is maintained at the normal atmospheric pressure value. Under the action of high-pressure and high-speed gasoline, a relative negative pressure is formed at the bottom of the control chamber 3, so that the gasoline in the control chamber 3 is quickly filled and flows into the negative pressure chamber 5.

[0046] The gasoline in the negative pressure chamber 5 is injected into the main fuel tank through the oil outlet channel 11, and the gasoline is transferred from the auxiliary fuel tank to the main fuel tank.

[0047] When the gasoline in the main tank is full, the gasoline flows from the main tank along the overflow valve through the overflow channel 8 into the bottom of the control chamber 3. Under the action of buoyancy and pressure, the reversing valve 9 is pushed to the top of the control chamber 3. At this time, the liquid in the pumping valve flows in the reference direction. Figure 3 :

[0048] The high-pressure gasoline from the original high-pressure oil pipe is injected into the high-pressure oil chamber 7. The oil outlet diameter of the high-pressure oil chamber 7 is less than 1mm. When the high-pressure gasoline passes through this place, the gasoline flow rate is greatly increased;

[0049] High-pressure and high-speed gasoline enters the negative pressure chamber 5, forming a large negative pressure area at the bottom of the negative pressure chamber 5;

[0050] The pressure in the control chamber 3 is maintained at the normal atmospheric pressure value. Under the action of high-pressure and high-speed gasoline, a relative negative pressure is formed at the bottom of the control chamber 3, so that the gasoline in the control chamber 3 is quickly filled and flows into the negative pressure chamber 5.

[0051] The gasoline in the negative pressure chamber 5 is injected into the main fuel tank through the oil outlet channel 11, and the gasoline is transferred from the auxiliary fuel tank to the main fuel tank.

[0052] This embodiment provides a preferred implementation method: the bottom diameter of the reversing valve 9 is smaller than the inner diameter of the second cavity 32 of the control cavity 3. When the gasoline in the main fuel tank is insufficient, the bottom of the reversing valve 9 is inserted into the second cavity 32 to achieve the closure of the liquid circuit here.

[0053] In this embodiment, when the reversing valve 9 is in the highest position in the control chamber 3, the top surface of the second valve body 91 fits against the top surface of the oil inlet channel 2, thereby closing the liquid path from the oil inlet channel 2 to the control chamber 3, so that the liquid in the overflow channel 8 can enter the control chamber 3 faster.

[0054] This embodiment provides a preferred implementation: a third through hole 1 communicating with the control chamber 3 is provided on the valve body 100, and a blocking cover 10 is provided in the third through hole 1; the blocking cover 10 comprises:

[0055] The cover bottom 103 is used as the top of the first section of the cavity 31, and the first through hole 105 is provided on the cover bottom 103;

[0056] The cover tube 102 is connected to the upper surface of the cover bottom 103. The inner diameter of the cover tube 102 is equal to the diameter of the first through hole 105. A fourth through hole 104 whose axis is not parallel to the axis of the first through hole 105 is also provided on the wall of the cover tube 102. The space inside the cover tube 102 is a part of the oil inlet channel 2.

[0057] The cover top 101 is connected to the upper surface of the cover tube 102 and is located in the third through hole 1 .

[0058] When assembling the liquid extraction valve of this embodiment, after the reversing valve 9 is placed in the valve body 100, the blocking cover 10 is inserted into the third through hole 1. The assembly method is simple and convenient. A sealing groove is provided in the axial direction of the cover top 101, and a sealing ring is installed in the sealing groove before the valve body 100 is inserted to achieve sealing of the liquid extraction valve 100.

[0059] This embodiment provides a preferred implementation: the bottom of the control chamber 3 is connected to the side wall of the negative pressure chamber 5 through a plurality of transition chambers 4, and the diameter of the transition chamber 4 gradually decreases from the second section of the cavity 32 to the negative pressure chamber 5.

[0060] This embodiment provides a preferred implementation method: the bottom of the negative pressure chamber 5 is connected to the high-pressure oil chamber 7 through the fifth through hole 6, and the diameter of the fifth through hole 6 is much smaller than the inner diameter of the high-pressure oil chamber 7, for example, 0.5 mm to 1 mm, so when the high-pressure gasoline passes through here, the gasoline flow rate can be greatly improved.

[0061] This embodiment provides a preferred implementation: the bottom of the negative pressure chamber 5 is a conical bottom protruding into the chamber, and the fifth through hole 6 is located at the center of the conical bottom.

[0062] In this embodiment, in order to better achieve negative pressure oil suction, the inlet end 1101 of the oil outlet channel 11 is located at the bottom of the negative pressure chamber 5. Further, the inlet end 1101 of the oil outlet channel 11 is funnel-shaped and the end surface close to the inlet is larger, and the inlet end 1101 of the oil outlet channel 11 is sleeved outside the conical bottom of the negative pressure chamber 5. Further, the gap between the inner wall surface of the inlet end 1101 of the oil outlet channel 11 and the conical bottom of the negative pressure chamber 5 is 1 to 3 times the inner diameter of the fifth through hole 6.

[0063] This embodiment also provides a structural implementation of the connection between the valve body 100 and the pipeline interface 200 : the pipeline interface 200 passes through the pipeline hole on the fixing plate 302 , and the fixing plate 302 is fixed to the valve body 100 by screws 301 .

[0064] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the technical solution.

[0065] In this technical solution, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this technical solution can be understood according to specific circumstances.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present technical solution. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they contradict each other.

[0067] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A liquid pumping valve with overflow function, characterized in that: Include: The valve body is provided with a control chamber, a negative pressure chamber and a high-pressure oil chamber inside; the bottom of the control chamber is connected to the side wall of the negative pressure chamber, and the bottom of the negative pressure chamber is connected to the high-pressure oil chamber; the control chamber includes a first section of the cavity, the bottom of the first section of the cavity is provided with a second section of the cavity, the inner diameter of the second section of the cavity is smaller than the inner diameter of the first section of the cavity, and the top of the first section of the cavity is provided with a first through hole; A reversing valve is arranged in the control cavity and can move along the axis of the control cavity; the reversing valve comprises: a first valve body, the outer diameter of the first valve body is equal to the inner diameter of the first cavity of the control cavity, and the first valve body has a conical bottom; a second valve body is located at the upper part of the first valve body, and the diameter of the second valve body is equal to the aperture of the first through hole, and the second valve body is located in the first through hole; a second through hole is arranged on the reversing valve, the axis of which is parallel to the axis of the control cavity; An overflow channel communicates with the control chamber, and the position where the two communicate is located at the bottom of the first section of the control chamber; An oil inlet passage extending upward from the first through hole of the control chamber; An oil outlet channel communicated with the negative pressure chamber; A high-pressure oil channel is communicated with the high-pressure oil chamber.

2. The liquid extraction valve according to claim 1, characterized in that: The bottom diameter of the reversing valve is smaller than the inner diameter of the second section of the control chamber.

3. The liquid extraction valve according to claim 1, characterized in that: When the reversing valve is at the highest position in the control chamber, the top surface of the second valve body is in contact with the top surface of the oil inlet passage.

4. The liquid extraction valve according to claim 3, characterized in that: The valve body is provided with a third through hole communicating with the control chamber, and a blocking cover is provided in the third through hole; the blocking cover comprises: A cover bottom, serving as the top of the first section of the cavity, wherein the first through hole is arranged on the cover bottom; A cover cylinder connected to the upper surface of the cover bottom, the inner diameter of the cover cylinder is equal to the diameter of the first through hole, a fourth through hole whose axis is not parallel to the axis of the first through hole is further arranged on the cylinder wall of the cover cylinder, and the space inside the cover cylinder is a part of the oil inlet passage; The cover top is connected to the upper surface of the cover tube and is located in the third through hole.

5. The liquid extraction valve according to claim 1, characterized in that: The bottom of the control chamber is connected to the side wall of the negative pressure chamber through a plurality of transition chambers, and the diameter of the transition chamber gradually decreases from the second section of the chamber to the negative pressure chamber.

6. The liquid extraction valve according to claim 1, characterized in that: The bottom of the negative pressure chamber is connected to the high pressure oil chamber via a fifth through hole, and the diameter of the fifth through hole is much smaller than the inner diameter of the high pressure oil chamber.

7. The liquid extraction valve according to claim 6, characterized in that: The bottom of the negative pressure cavity is a conical bottom protruding into the cavity, and the five through holes are located at the center of the conical bottom.

8. The liquid extraction valve according to claim 7, characterized in that: The inlet end of the oil outlet channel is located at the bottom of the negative pressure chamber.

9. The liquid extraction valve according to claim 8, characterized in that: The inlet end of the oil outlet channel is funnel-shaped and the end surface close to the inlet is larger. The inlet end of the oil outlet channel is sleeved outside the conical bottom of the negative pressure chamber.

10. The liquid extraction valve according to claim 9, characterized in that: The gap between the inner wall surface of the inlet end of the oil outlet channel and the conical bottom of the negative pressure chamber is 1 to 3 times the inner diameter of the fifth through hole.

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