CN218199833U - Fuel injection pump - Google Patents

Abstract

The utility model provides a fuel injection pump, includes pump main body, the big lid of connecting the container, nozzle, play liquid check valve, main piston rod and the spanner of drive main piston rod up-and-down motion, and nozzle, play liquid check valve set up in the export of pump main body, make the play liquid runner in the pump main body through going out liquid check valve and nozzle intercommunication, form the main piston pressure boost chamber that volume can change between the cavity of main piston rod and pump main body, its characterized in that: the main piston pressurizing cavity is communicated with a liquid outlet one-way valve on the pump main body through a pressurizing valve and a flow passage structure. The continuous pressure pipe is cancelled, so that the liquid spraying device is more suitable for oil spraying, in addition, the oil dripping phenomenon can be reduced due to the liquid outlet one-way valve, and the whole structure is simpler and more universal.

Description

Fuel injection pump

Technical Field

The utility model relates to a atomizer, concretely relates to injection pump.

Background

Most of the existing hydraulic oil injection pumps comprise a pump body, a wrench and a nozzle, liquid storage cavities are arranged in a spray head and the pump body, however, the liquid storage cavities are very small in size and cannot accumulate more liquid, so that the spraying time is short, and the long-time spraying cannot be realized; meanwhile, the design of the appearance structure is single, and diversity cannot be realized.

Through inspection, chinese patent No. CN202122523640.9 discloses an oil spraying bottle, which comprises a bottle body and a nozzle assembly, and is characterized in that: the sprayer component is detachably mounted on the bottle body through the adapter, the sprayer component comprises a main body, the lower end of the main body is connected with an upper end clamping sleeve of the adapter, a pump body is arranged in the bottle body, the upper end of the pump body is connected with the lower end of the main body in a matched mode, an upper piston is arranged in the main body, a nozzle is arranged at the upper end of the front side of the main body, a wrench for driving the upper piston to move up and down is arranged below the nozzle, the nozzle is of a special half-moon-shaped structure, and when the nozzle sprays oil, the oil spray is sprayed in a fan-shaped plane mode. Its structural design is reasonable, the assembly is swift convenient, not only sprays effectually, irritates the oil convenience, but also effective control daily oil mass, uses safe and reliable, the oil spout when being particularly useful for the barbecue, also the oil spout when also can be used to daily dish cooking. The disadvantage is that oil dripping phenomenon exists.

In addition, the applicant discloses a liquid spraying pump in chinese patent with patent application No. CN202110981541.7, which comprises a pump main body, a large cover connected with a container, a nozzle, a liquid outlet one-way valve, a main piston rod and a wrench driving the main piston rod to move up and down, wherein the nozzle and the liquid outlet one-way valve are arranged in an outlet of the pump main body, so that a liquid outlet flow passage in the pump main body is communicated with the nozzle through the liquid outlet one-way valve, and a main piston pressurizing cavity with variable volume is formed between the main piston rod and a cavity of the pump main body, and the liquid spraying pump is characterized in that: the main piston pressurizing cavity is communicated with a liquid outlet one-way valve on the pump main body through a pressurizing valve and a flow passage structure; and the main piston pressurizing cavity is also communicated with a continuous pressure cavity in a continuous pressure pipe hidden in the container through a pressurizing valve and a flow passage structure, the continuous pressure pipe is internally provided with a continuous pressure piston and a continuous pressure spring for keeping the volume of the continuous pressure cavity to be reduced, and the continuous pressure cavity is communicated with the liquid outlet one-way valve through the flow passage structure. The defect is that the structure of the continuous pressure pipe is more suitable for spraying liquid such as water and is not suitable for spraying oil.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to foretell technical current situation and provide a fuel injection pump that structural design is reasonable, be fit for the oil spout, reduce the oil drip phenomenon.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a fuel injection pump, includes pump main part, the big lid of connecting the container, the nozzle, goes out liquid check valve, main piston rod and drive main piston rod up-and-down motion's spanner, and nozzle, play liquid check valve set up in the export of pump main part, make the play liquid runner in the pump main part through going out liquid check valve and nozzle intercommunication, form the main piston booster chamber that the volume can change between the cavity of main piston rod and pump main part, its characterized in that: the main piston pressurizing cavity is communicated with the liquid outlet one-way valve on the pump main body through a pressurizing valve and a flow passage structure.

As an improvement, the flow channel structure at least comprises transverse flow channels, the transverse flow channels are distributed in the pump main body, the outlet of the main piston pressurization cavity is used as a boundary, the transverse flow channel at the front section is a liquid outlet flow channel and used for communicating the outlet of the main piston pressurization cavity with a liquid outlet one-way valve, and the transverse flow channel at the middle and rear sections is sealed by a sealing column.

The booster pump is characterized in that a booster valve is arranged at the upper end of a main piston boosting cavity of the pump main body and comprises a booster valve seat, a through hole is longitudinally formed in the booster valve seat, the outer wall of the booster valve seat is fixed with the inner wall of the main piston boosting cavity of the pump main body in a sealing mode, a reducing section is arranged at the upper end of the booster valve seat, a liquid outlet hole is transversely formed in the upper portion of the reducing section, a booster valve core is of a silica gel sleeve structure and is sleeved outside the reducing section of the booster valve seat, the thickness of the upper portion, corresponding to the liquid outlet hole, of the booster valve core is reduced, a main piston rod is coaxially arranged below the booster valve, the main piston rod is a hollow rod with a wide upper end and a narrow lower end, the upper end of the main piston rod is a hollow main piston, the outer wall of the main piston abuts against the inner wall of the main piston boosting cavity of the pump main piston rod, a main valve is arranged at the bottom of the inner cavity of the upper end of the main piston rod, the lower end of the main piston rod penetrates through a large cover to be connected with a suction pipe, and a main working spring is supported between the upper end of the main piston rod and the booster valve seat.

Furthermore, the lower end of the big cover is provided with an internal thread structure connected with the container, and the middle part of the upper end surface of the big cover is convexly provided with an outer ring matched and clamped with the lower end opening of the pump main body and an inner ring for the lower end of the main piston rod to penetrate through.

Further, the spanner is installed in the front side of pump main part, the below of nozzle, and the well upper portion of spanner is connected with the pump main part through pin joint structure to the inboard of messenger's spanner pushes away the foot and passes the wall guiding hole of pump main part, contradicts in the lower bottom surface of the upper end main piston of piston rod, realizes being connected with main piston rod, through pulling the spanner, can realize that main piston rod reciprocates.

The improved pump is characterized in that a mounting seat for mounting the liquid outlet check valve is arranged on the front side of the upper end of the pump main body, the liquid outlet check valve comprises a small liquid outlet valve seat and a small liquid outlet valve seat cover, the small liquid outlet valve seat cover is fixedly arranged in the mounting seat and fixedly connected with the small liquid outlet valve seat in a clamping manner, a small liquid outlet valve and a small liquid outlet valve spring are arranged in the small liquid outlet valve seat, the nozzle is mounted at the front end of the mounting seat, and the aperture of the nozzle is 0.5-0.7 mm.

The pump main part is equipped with a shell and upper cover outward, and the shell shroud is outside the pump main part, and the lower extreme and the container of shell offset, and the front side of shell is equipped with corresponding to the position of spanner and dodges the mouth, and the upper cover lid is established and is closed ultrasonic welding fixed with the upper end of shell in pump main part top, is equipped with the trompil that supplies the nozzle to stretch out in the front side of upper cover and shell.

And finally, the flow channel structure is also provided with a longitudinal flow channel communicated with the transverse flow channel, the longitudinal flow channel of the upper part is distributed on the pump main body, the longitudinal flow channel of the lower part is distributed in the large cover, and the longitudinal flow channel of the upper part and the longitudinal flow channel of the lower part are mutually communicated in a sealing way.

Compared with the prior art, the utility model has the advantages of: on original structure basis, cancelled continuous pressing pipe, made liquid spray device be fit for the oil spout more, in addition, owing to there is a play liquid check valve, can reduce the oil drip phenomenon, overall structure simplifies more and general, and the main part can be used in this application very much, also can use on the hydrojet pump of original design, makes product nimble, variety more.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

fig. 2 is an exploded view of an embodiment of the present invention;

fig. 3 (a) -3 (e) are schematic diagrams illustrating the operation of the embodiment of the present invention;

wherein (a) is an initial state; (b) In order to pull the wrench, the main piston rod moves upwards, the main valve is closed, and the booster valve is opened; (c) the liquid in the pressurizing cavity of the main piston is sprayed out through the one-way valve; (d) When the pressure at the liquid passage B is reduced, the liquid outlet one-way valve is closed instantly; (e) When the wrench is loosened, the main piston rod moves downwards, the main valve is opened, and the oily liquid in the container is sucked into the pump main body.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1, 2, 3 (a) -3 (e), an oil injection pump includes a pump body 1, a large cover 2 connected to a container 8, a nozzle 3, a liquid outlet check valve 4, a main piston rod 5 and a wrench 6 for driving the main piston rod 5 to move up and down, wherein the nozzle 3 and the liquid outlet check valve 4 are arranged in an outlet of the pump body 1, so that a liquid outlet channel C in the pump body 1 is communicated with the nozzle 3 through the liquid outlet check valve 4, a main piston pressurizing cavity a with a variable volume is formed between the main piston rod 5 and a cavity of the pump body 1, and the channel structure is that the main piston pressurizing cavity a is communicated with the liquid outlet check valve 4 on the pump body 1 through a pressurizing valve 70 and a liquid outlet channel B, so that when the wrench 6 is pressed, the main piston rod 5 moves up, the main piston pressurizing valve 70 is opened, the liquid in the main piston pressurizing cavity a flows to the liquid outlet check valve 4 through the liquid outlet channel B, and the liquid outlet check valve 4 can be ejected from the nozzle 3.

In this embodiment, the transverse flow channels are distributed in the pump main body 1, the outlet 72 of the main piston pressurizing cavity a is used as a boundary, the transverse flow channel of the front section is used as a liquid outlet flow channel B, the transverse flow channel of the middle and rear sections can be sealed by a silica gel sealing column 10, the cavity of the pump main body 1 is the upper end of the main piston pressurizing cavity a and is provided with a pressurizing valve, the pressurizing valve comprises a pressurizing valve seat 7, the pressurizing valve seat 7 is longitudinally provided with a through hole, the outer wall of the pressurizing valve seat 7 is fixed with the inner wall of the cavity of the pump main body 1 in a sealing manner, the upper end of the pressurizing valve seat 7 is a diameter-reduced section, the upper part of the diameter-reduced section is transversely provided with a liquid outlet hole 71, the pressurizing valve core 70 is of a silica gel sleeve structure, the pressurizing valve core 70 is sleeved outside the diameter-reduced section of the pressurizing valve seat 7, the thickness of the upper part of the pressurizing valve core 70 corresponding to the liquid outlet hole 71 is reduced, and thus, when the pressure in the main piston pressurizing cavity a increases, the upper part of the pressurizing valve core 70 corresponding to the liquid outlet hole 71 can be squeezed and opened, namely the pressurizing valve is opened. The main piston rod 5 is coaxially arranged below the booster valve, the main piston rod 5 is a hollow rod with a wide upper end and a narrow lower end, the upper end of the main piston rod 5 is a hollow main piston 52, the outer wall of the main piston 52 is in sealing and abutting contact with the inner wall of a main piston boosting cavity A of the pump body 1, an elastic valve seat 53 is arranged at the bottom of an inner cavity of the main piston 52 at the upper end of the main piston rod 5 around an opening position, the elastic valve seat 53 is of a sleeve seat structure, the side wall of the sleeve seat is grooved to increase the elasticity of the sleeve seat, a flange for limiting the sliding-out of the valve core is arranged on the inner wall of the sleeve seat, and a ball is arranged in the elastic valve seat 53 to serve as the main valve core 50, so that a main valve is formed, and the structure is a conventional one-way ball valve. The lower end of the main piston rod 5 is connected with the suction pipe 9 through the big cover 2, the end of the suction pipe 9 is fixed with a filter screen seat 91, and a main working spring 51 is supported between the upper end of the main piston rod 5 and the booster valve seat 7, so that the main piston rod 5 has a tendency of moving downwards all the time.

The pump body 1 and the large cover 2 are assembled together, and can be assembled together by adopting a snap connection manner, namely, the pump body 1 and the large cover 2 are connected together by arranging a bayonet and a clamping foot at the connection position respectively.

The lower end of the big cover 2 is provided with an internal thread structure connected with the container 8 such as various bottle bodies, the container 8 can contain edible oil, the middle part of the upper end surface of the big cover 2 is convexly provided with an outer ring 21 which is matched and spliced with the lower end opening of the pump main body 1 and an inner ring 22 for the lower end of the main piston rod 5 to penetrate, and the sealing connection is realized by combining a sealing ring. Spanner 6 is installed in the front side of pump main part 1, the below of nozzle 3, and the well upper portion of spanner 6 is connected with pump main part 1 through pin joint structure to the inboard that makes spanner 6 pushes away foot 61 and passes the wall guiding hole of pump main part 1, contradicts bottom surface under the upper end main piston 52 of piston rod 5, realizes being connected with main piston rod 5, through pulling spanner 6, can realize that main piston rod 5 reciprocates. The front side of the upper end of the pump main body 1 is provided with a mounting seat 4a for mounting the liquid outlet check valve 4, the liquid outlet check valve 4 comprises a small liquid outlet valve seat 41 and a small liquid outlet valve seat cover 42, the small liquid outlet valve seat cover 42 is fixedly arranged in the mounting seat 4a, the small liquid outlet valve seat cover 42 is fixedly connected with the small liquid outlet valve seat 41 in a buckling manner, a small liquid outlet valve 43 and a small liquid outlet valve spring 44 are arranged in the small liquid outlet valve seat 41, the nozzle 3 is mounted at the front end of the mounting seat 4a, and the aperture of the nozzle 3 is 0.5-0.7 mm. Pump main part 1 is equipped with a shell 11 and upper cover 12 outward, and shell 11 shroud is outside pump main part 1, and the lower extreme and the container of shell 11 offset, and the front side of shell 11 is equipped with corresponding to the position of spanner 6 and dodges the mouth, and upper cover 12 lid is established in pump main part 1 top and the upper end of shell 11 and is closed ultrasonic welding fixed, is equipped with the trompil that supplies nozzle 3 to stretch out in the front side of upper cover 12 and shell 11.

In order to provide the versatility of the components, the flow path structure is also provided with a longitudinal flow path C which is communicated with the transverse flow path, the longitudinal flow path C of the upper part is distributed on the pump body 1, the longitudinal flow path C of the lower part is distributed in the large cover 2, and the longitudinal flow path of the upper part and the longitudinal flow path of the lower part are mutually communicated in a sealing way. Thus, the main body 1 can be used in the present application, and also can be used on a liquid spraying pump designed originally, so that the product is more flexible and diversified.

The specific working principle is as follows:

pulling the wrench 6 downwards, as shown in fig. 3 (B), the main piston rod 5 overcomes the elastic force of the main working spring 51 to move upwards under the action of the wrench, the main piston 52 also moves upwards to close the main valve instantly, at the same time, the pressure increasing valve is opened due to the pressure increase of the pressure increasing cavity a of the main piston, a part of the oily liquid in the pressure increasing cavity a of the main piston flows to the liquid outlet one-way valve 4 through the liquid outlet flow channel B, as shown in fig. 3 (c), when the pressure at the liquid channel B increases to a certain value, the liquid is conducted to the liquid outlet one-way valve 4 through the liquid, so that the liquid outlet one-way valve 4 is opened, and the liquid is sprayed out through the nozzle 3; as shown in fig. 3 (d), after the oily liquid in the pressurizing cavity a of the main piston is ejected, the pressure at the liquid passage B is reduced, and when the pressure is lower than the pressure for opening the liquid outlet check valve 4, the liquid outlet check valve 4 is closed instantly; as shown in fig. 3 (e), when the wrench 6 is loosened, the main piston rod 5 moves downward under the action of the main working spring 51, the volume of the main piston pressurizing chamber a becomes larger, the pressure decreases, the main valve element 50 can be opened, and the oil liquid in the container is sucked into the main piston pressurizing chamber a of the pump main body 1 through the suction pipe 9, so that the next preparation is made.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and embellishments can be made without departing from the technical principle of the present invention, and these improvements and embellishments should also be regarded as the protection scope of the present invention.

Claims (8)

1. The utility model provides a fuel injection pump, includes pump main body, the big lid of connecting the container, nozzle, play liquid check valve, main piston rod and the spanner of drive main piston rod up-and-down motion, and nozzle, play liquid check valve set up in the export of pump main body, make the play liquid runner in the pump main body through going out liquid check valve and nozzle intercommunication, form the main piston pressure boost chamber that volume can change between the cavity of main piston rod and pump main body, its characterized in that: the main piston pressurizing cavity is communicated with a liquid outlet one-way valve on the pump main body through a pressurizing valve and a flow passage structure.

2. The fuel injection pump of claim 1, wherein: the flow channel structure at least comprises transverse flow channels, the transverse flow channels are distributed in the pump main body, the outlet of the main piston pressurization cavity is used as a boundary, the transverse flow channel at the front section is a liquid outlet flow channel and used for communicating the outlet of the main piston pressurization cavity with the liquid outlet one-way valve, and the transverse flow channels at the middle and rear sections are sealed by sealing columns.

3. The fuel injection pump of claim 2, wherein: the booster valve is characterized in that a booster valve is arranged at the upper end of a main piston booster cavity of the pump main body and comprises a booster valve seat, a through hole is longitudinally formed in the booster valve seat, the outer wall of the booster valve seat is fixed with the inner wall of the main piston booster cavity of the pump main body in a sealing mode, a reducing section is arranged at the upper end of the booster valve seat, a liquid outlet hole is transversely formed in the upper portion of the reducing section, the booster valve core is of a silica gel sleeve structure and is sleeved outside the reducing section of the booster valve seat, the thickness of the upper portion, corresponding to the liquid outlet hole, of the booster valve core is reduced, a main piston rod is coaxially arranged below the booster valve, the main piston rod is a hollow rod with a wide upper end and a narrow lower end, the upper end of the main piston rod is provided with a hollow main piston, the outer wall of the main piston abuts against the inner wall of the main piston booster cavity of the pump main piston rod and is sealed with the upper end of the booster valve seat, a main valve is arranged at the bottom of the inner cavity of the main piston rod in an opening position, the main piston rod penetrates through a large cover and is connected with a suction pipe, and a main working spring is supported between the upper end of the main piston rod and the booster valve seat.

4. The fuel injection pump of claim 3, wherein: the lower end of the big cover is provided with an internal thread structure connected with the container, and the middle part of the upper end surface of the big cover is convexly provided with an outer ring which is matched and clamped with the lower end opening of the pump main body and an inner ring for the lower end of the main piston rod to penetrate through.

5. The fuel injection pump of claim 4, wherein: the spanner is installed in the front side of pump main part, the below of nozzle, and the well upper portion of spanner is connected with the pump main part through pin joint structure to the inboard of messenger's spanner pushes away the foot and passes the wall guiding hole of pump main part, contradicts bottom surface under the upper end main piston of piston rod, realizes being connected with main piston rod, through pulling the spanner, can realize that main piston rod reciprocates.

6. The injection pump of any one of claims 1 to 5, wherein: the liquid outlet check valve comprises a small liquid outlet valve seat and a small liquid outlet valve seat cover, the small liquid outlet valve seat cover is fixedly arranged in the mounting seat, the small liquid outlet valve seat cover is fixedly connected with the small liquid outlet valve seat in a buckling mode, a small liquid outlet valve and a small liquid outlet valve spring are arranged in the small liquid outlet valve seat, the nozzle is arranged at the front end of the mounting seat, and the aperture of the nozzle is 0.5-0.7 mm.

7. The fuel injection pump of claim 6, wherein: the pump main part is equipped with a shell and upper cover outward, and the shell shroud is outside the pump main part, and the lower extreme and the container of shell offset, and the front side of shell is equipped with corresponding to the position of spanner and dodges the mouth, and the upper cover lid is established and is closed ultrasonic welding fixed with the upper end of shell in pump main part top, is equipped with the trompil that supplies the nozzle to stretch out in the front side of upper cover and shell.

8. The fuel injection pump of claim 6, wherein: the flow passage structure is also provided with a longitudinal flow passage communicated with the transverse flow passage, the longitudinal flow passage of the upper part is distributed on the pump main body, the longitudinal flow passage of the lower part is distributed in the large cover, and the longitudinal flow passage of the upper part and the longitudinal flow passage of the lower part are mutually communicated in a sealing way.

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