CN111188683A

CN111188683A - High-pressure pump

Info

Publication number: CN111188683A
Application number: CN202010179446.0A
Authority: CN
Inventors: 蒋志; 杨锋
Original assignee: Zhejiang Youjia Agricultural Machinery Technology Co Ltd
Current assignee: Zhejiang Youjia Agricultural Machinery Technology Co Ltd
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2020-05-22
Anticipated expiration: 2040-03-16
Also published as: CN111188683B

Abstract

The invention provides a high-pressure pump, and belongs to the technical field of water pumps. The high-pressure pump solves the problems that the water pumping pressure of the existing high-pressure pump is unstable and the existing high-pressure pump cannot be automatically started and stopped. The high-pressure pump comprises an engine and a pump head, wherein the pump head is provided with a water inlet hole and a water outlet hole which are communicated with each other, the pump head is provided with a pressure regulating valve which is positioned between the water inlet hole and the water outlet hole and used for regulating the pressure of water outlet, and the pump head is also provided with a start-stop device which is used for stopping the engine when the water outlet hole has overpressure and is used for starting the agricultural machinery when the pressure of the water outlet hole. The invention has the advantages of stable water outlet pressure, good energy-saving effect, long service life and the like.

Description

High-pressure pump

Technical Field

The invention belongs to the technical field of water pumps, relates to a pressure pump, and particularly relates to a high-pressure pump.

Background

In modern agricultural technology, field plant protection spraying is an important link, and the current field plant protection spraying technology mainly comprises airplane aviation operation, a spray rod type spraying machine, manual spraying, suspension or suspension spraying and the like.

For example, chinese patent literature discloses a large-arm spread multi-rotor suspension type pesticide spraying device [ application No.: 201810970505.9, respectively; application publication No.: CN108910048A ], which comprises a movable rack and one or a set of independent suspension brackets, wherein the suspension brackets are distributed with a plurality of rotors, each rotor is fixed on the suspension bracket through a rotation axis, and the lower end of each rotation axis is provided with one or a set of nozzles, each nozzle is connected in sequence and arranged on a high-pressure cartridge, or each nozzle is connected with a medicine box through a high-pressure cartridge, the medicine box is fixed on the movable rack, a high-pressure pump is arranged between the high-pressure cartridge and the medicine box, and the medicine liquid in the box is pumped into the cartridge through the high-pressure pump and sprayed through each nozzle.

The large-arm multi-rotor suspension type pesticide spraying device is the same as other conventional pesticide spraying devices in that a high-pressure pump is required to deliver pesticide liquid, the conventional high-pressure pump comprises an engine, a pump shaft and a pump head, the engine drives the pump shaft to rotate, the pump shaft drives a pump wheel fixedly connected with the pump shaft to rotate, so that the pesticide liquid enters the pump head from a water inlet end of the pump head and then flows out from a water outlet hole, the water outlet hole is connected with a pesticide tube, the pesticide liquid is sprayed through a valve (generally an electromagnetic valve) and a nozzle arranged on the pesticide tube, in the using process, the spraying effect of the nozzle is poor due to overhigh pressure in the water outlet hole, and a switch pulling piece arranged on the engine needs to be manually rotated to start and stop the engine, so that the operation is inconvenient, in the using process, when the valve is closed and liquid feeding is not needed, the engine is, the service life is shortened.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a high-pressure pump which can adjust the water outlet pressure and has a start-stop function.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a high-pressure pump, includes engine and pump head, the pump head have inlet opening and apopore of intercommunication each other, its characterized in that, the pump head on be equipped with and be located the air-vent valve in order to adjust water pressure between inlet opening and the apopore, the pump head on still be equipped with when the apopore superpressure with stop engine work, the apopore pressure is normal with starting the device that opens and stops of starting agricultural machinery work.

According to the high-pressure pump, the pressure regulating valve is arranged on the pump head, when the pressure of the water outlet hole is increased, the pressure regulating valve plays a role in regulating the pressure so as to reduce the pressure of the water outlet hole, so that the water outlet pressure is stable, and the stable spraying effect of the nozzle is ensured; the engine can be controlled to start and stop according to the water outlet hole pressure by the start-stop device, idle consumption of the engine is avoided, fuel consumption is reduced, the energy-saving effect is good, the abrasion of internal parts is less, and the service life is long.

In the above high pressure pump, the pressure regulating valve and the start-stop device are integrated into a whole. Therefore, the structure is compact, the volume is reduced, and the installation and the arrangement are convenient.

In foretell high-pressure pump, the pump head in be equipped with the intermediate chamber and supply the mounting hole of pressure regulating valve installation, the inner of mounting hole be linked together with the apopore, the pump head in be equipped with the water hole of crossing of intercommunication intermediate chamber and apopore and the pressure relief vent of intercommunication intermediate chamber and pressure regulating valve.

In the above high pressure pump, the water through hole is provided with a first check valve for allowing water to flow from the water outlet hole to the intermediate cavity, and the pressure relief hole is provided with a second check valve for allowing water to flow from the intermediate cavity to the pressure relief valve. The arrangement of the one-way valve I and the one-way valve II determines the flow direction of water, turbulence is avoided, the pressure regulating valve works stably, and the pressure of outlet water is stable.

In foretell high-pressure pump, the air-vent valve include the valve rod, go up the valve body and be the lower valve body of tube-shape, last valve body and lower valve body all link firmly in the mounting hole sealedly, last valve body be tube-shape and top and have the top cap, the bottom of going up the valve body is connected in the top of lower valve body, the valve rod pass the top cap setting, valve rod and top cap between be equipped with the elasticity that spring and spring provided and make the bottom of valve rod have the trend of sealing in lower valve body all the time, lower valve body radially run through have a plurality of to communicate in the income water hole of relief pressure hole, the valve rod inlay be equipped with seal ring one and the valve rod that seals in lower valve body have the liquid chamber that leads to in the income water hole between the lower valve body of seal ring one.

In the high-pressure pump, a water return hole communicated with the water outlet hole is arranged in the pump head, a water return gap communicated with the water return hole is arranged between the upper valve body and the lower valve body and the mounting hole, a one-way valve III enabling water to flow from the water outlet hole to the water outlet gap is arranged in the water return hole, the lower valve body is provided with a water return through hole which is radially communicated with the water return gap, a sealing ring II is embedded in the valve rod, the sealing ring II is arranged closer to the top of the valve rod than the sealing ring I, the water return through hole is arranged between the sealing ring I and the sealing ring II, the valve rod is provided with an annular groove which is arranged between the sealing ring I and the sealing ring II and communicated with the water return through hole, the start-stop device is arranged between the outer end, extending out of the upper valve body, of the valve rod and a switch trip piece arranged on the engine, and the start-stop device drives the switch trip piece to rotate to stop the engine after the water, after the valve rod is reset, the start-stop device drives the switch trip piece to rotate so as to start the engine.

In the above high-pressure pump, the pump head is fixedly connected with a support, the start-stop device comprises a connecting rod, the lower end of the connecting rod is hinged to the support, the outer end of the valve rod is hinged to a rod body, close to the lower end, of the connecting rod, and a driving part is connected between the upper end of the connecting rod and the switch pulling part.

In the above high pressure pump, the upper end of the connecting rod is hinged with a hook. The engine can be manually controlled to start and stop through the hook, and the use is convenient.

As another aspect, in the above high pressure pump, the pump head is fixedly connected to a support, the start/stop device includes a connecting rod, a gear is fixedly connected to a lower end of the connecting rod, a rack is disposed at an outer end of the valve rod, the connecting rod is hinged to the support and is engaged with the rack, and a driving member is connected between an upper end of the connecting rod and the switch trip member.

In the above high pressure pump, the driving member is a steel rope, a pull rod or an iron chain.

Compared with the prior art, this high-pressure pump compact structure, the installation is arranged conveniently, and small in size is applicable to on the equipment that needs the high-pressure pump to spray the operation such as agricultural machinery, sanitation car, convenient to use has the engine and opens the function automatically, and is energy-conserving effectual, and long service life, and has a water pressure regulating function for it is stable to go out water pressure, has guaranteed stable effect of spraying.

Drawings

Fig. 1 is a perspective view of the high-pressure pump.

Fig. 2 is a longitudinal sectional view of a pump head in the present high pressure pump.

Fig. 3 is a transverse cross-sectional view of the pump head in the present high pressure pump.

Fig. 4 is an enlarged view of the structure of fig. 2 at circle a.

Fig. 5 is an enlarged view of the structure of fig. 3 at circle B.

Fig. 6 is a schematic structural view of the start-stop device in embodiment 2.

In the figure, 1, an engine; 2. a pump head; 3. a water inlet hole; 4. a water outlet hole; 5. a middle cavity; 6. water passing holes; 7. a pressure relief hole; 8. a one-way valve I; 9. a second one-way valve; 10. a valve stem; 11. an upper valve body; 12. a lower valve body; 13. a top cover; 14. a spring; 15. a water inlet hole; 16. a first sealing ring; 17. a liquid passing cavity; 18. a water return hole; 19. a water return gap; 20. a one-way valve III; 21. a water return through hole; 22. a second sealing ring; 23. an annular groove; 24. a switch trip member; 25. a support; 26. a connecting rod; 27. a driver; 28. hooking; 29. a gear; 30. a rack.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example 1

As shown in fig. 1 and 2, the high pressure pump includes an engine 1 and a pump head 2, the pump head 2 has a water inlet hole 3 and a water outlet hole 4 which are communicated with each other, the pump head 2 is provided with a pressure regulating valve which is positioned between the water inlet hole 3 and the water outlet hole 4 and used for regulating the pressure of the water outlet, the pump head 2 is further provided with a start-stop device which stops the engine 1 when the pressure of the water outlet hole 4 is over-pressure and starts the engine to work when the pressure of the water outlet hole 4 is normal. In order to have compact structure and convenient manufacture and installation, the pressure regulating valve and the start-stop device are integrated into a whole.

In further detail, the pump head 2 is provided with a middle cavity 5 and a mounting hole for installing a pressure regulating valve, the inner end of the mounting hole is communicated with the water outlet hole 4, the pump head 2 is provided with a water through hole 6 for communicating the middle cavity 5 with the water outlet hole 4 and a pressure relief hole 7 for communicating the middle cavity 5 with the pressure regulating valve, in the embodiment, the pump head 2 is provided with three connecting pipes which are connected with plugs in parallel and in threaded connection at the top ends, inner cavities of the connecting pipes are communicated with each other to form the middle cavity 5, the water through hole 6 is provided with a one-way valve I8 for enabling water to flow from the water outlet hole 4 to the middle cavity 5, and the pressure relief hole 7 is provided with a one-way valve. The arrangement of the middle cavity 5, the water through hole 6 and the pressure relief hole 7 optimizes the water path arrangement, so that the working stability of the pressure regulating valve is good, and the pressure regulating valve is convenient to install in the installation hole; when water is normally supplied, water flows to the pressure regulating valve through the water through hole 6, the middle cavity 5 and the pressure relief hole 7, the pressure regulating valve cannot work due to insufficient water pressure, water cannot return from the inner end of the mounting hole, and water can normally flow out from the water outlet hole 4; when the pressure of the water outlet hole 4 is increased, water flows to the middle cavity 5 from the water passing hole 6 and then flows to the pressure regulating valve through the pressure relief hole 7, the pressure regulating valve works, and the water after pressure relief flows into the water outlet hole 4 again from the inner end of the mounting hole, so that the water outlet pressure of the water outlet hole 4 is stable.

As shown in fig. 2 and 4, the pressure regulating valve comprises a valve rod 10, an upper valve body 11 and a cylindrical lower valve body 12, wherein the upper valve body 11 and the lower valve body 12 are hermetically and fixedly connected in a mounting hole, in this embodiment, an O-ring sealed on the inner wall of the mounting hole is embedded in the outer wall of the upper valve body 11, the upper valve body 11 is cylindrical, the top end of the upper valve body 11 is provided with a top cover 13, the bottom end of the upper valve body 11 is connected to the top of the lower valve body 12, the valve rod 10 is arranged by penetrating through the top cover 13, a spring 14 is arranged between the valve rod 10 and the top cover 13, the spring 14 is sleeved on the valve rod 10, and the bottom end of the valve rod 10 always tends to be sealed on the lower valve body 12, here, the bottom end of the valve rod 10 is embedded with a sealing ring, the inner wall of the lower valve body 12 is provided with a conical surface for the sealing ring to abut against so as to ensure an ideal sealing effect, the bottom end of the upper valve body 11 radially protrudes out of the inner wall of the lower valve body 12 so as to play a role of blocking the valve rod 10, and the failure of the spring 14 caused by the displacement transition of the valve rod 10 is avoided; the lower valve body 12 is provided with two water inlet holes 15 communicated with the pressure relief holes 7 in a radial penetrating manner, the outer wall of the lower valve body 12 is embedded with O-shaped rings positioned at the upper end and the lower end of the water inlet holes 15, the valve rod 10 is embedded with a sealing ring 16 sealed on the lower valve body 12, and the valve rod 10 is provided with a liquid passing cavity 17 communicated with the water inlet holes 15 between the lower part of the sealing ring 16 and the lower valve body 12.

High-pressure water in the pressure relief hole 7 enters the liquid passing cavity 17 from the water inlet hole 15, so that the valve rod 10 is pushed to overcome the elastic force of the spring 14 to axially displace, the bottom end of the valve rod 10 is separated from the lower valve body 12, the high-pressure water is subjected to the pressure reduction effect of the pressure regulating valve at the moment, and the water flows to the mounting hole and the water outlet hole 4 from the lower valve body 12 to be discharged, so that the water discharge pressure is stable; the size of the water pressure in the liquid passing cavity 17 determines the size of the axial displacement of the valve rod 10, namely the size of the opening degree between the bottom end of the valve rod 10 and the lower valve body 12, so that the pressure regulating effect is achieved, and the water outlet pressure is stable.

As shown in fig. 3 and 5, a water return hole 18 communicated with the water outlet hole 4 is arranged in the pump head 2, a water return gap 19 communicated with the water return hole 18 is arranged between the upper valve body 11 and the lower valve body 12 and the mounting hole, a one-way valve three 20 enabling water to flow from the water outlet hole 4 to the water outlet gap is arranged in the water return hole 18, the lower valve body 12 is provided with a water return through hole 21 radially communicated with the water return gap 19, a sealing ring two 22 is embedded in the valve rod 10, the sealing ring two 22 is arranged closer to the top of the valve rod 10 than the sealing ring one 16, the water return through hole 21 is arranged between the sealing ring one 16 and the sealing ring two 22, the valve rod 10 is provided with an annular groove 23 positioned between the sealing ring one 16 and the sealing ring two 22 and communicated with the water return through hole 21, the start-stop device is arranged between the outer end of the valve rod 10 extending out of the upper valve body 11 and a switch toggle piece 24 arranged on the, the start-stop device drives the switch trip piece 24 to rotate so that the engine 1 stops working, and when the valve rod 10 is reset, the start-stop device drives the switch trip piece 24 to rotate so that the engine 1 is started.

When the valve is closed and liquid feeding is not needed, namely the water outlet hole 4 is closed, the engine 1 still works to enable the water pressure at the water outlet hole 4 to be continuously increased, high-pressure water can flow to the middle cavity 5 from the water passing hole 6 and then enters the liquid passing cavity 17 from the water inlet hole 15 through the pressure relief hole 7, the valve rod 10 is pushed to overcome the elastic force of the spring 14 to axially displace, and the high-pressure water continuously pressurized by the water outlet hole 4 enters the annular groove 23 of the valve rod 10 through the water return hole 18, the water return gap 19 and the water return through hole 21, so that the valve rod 10 is pushed to continuously move axially outwards to overcome the elastic force of the spring 14, the outer end of the valve rod 10 drives the switch pulling piece 24 to rotate through the starting and stopping device to enable the engine 1 to stop working; when the valve is opened, water is discharged from the water outlet hole 4, the elastic force of the spring 14 enables the valve rod 10 to move inwards and reset, and the outer end of the valve rod 10 drives the switch trip piece 24 to rotate through the starting and stopping device, so that the engine 1 is restarted.

As shown in fig. 2, the pump head 2 is fixedly connected with a support 25, the start-stop device comprises a connecting rod 26 with a lower end hinged with the support 25, the outer end of the valve rod 10 is hinged on the rod body of the connecting rod 26 close to the lower end, and a driving member 27 is connected between the upper end of the connecting rod 26 and the switch trip member 24. The valve rod 10 moves outwards to drive the upper end of the connecting rod 26 to move upwards, so that the driving piece 27 drives the switch driving piece 24 to rotate, the engine 1 stops working, the valve rod 10 moves downwards to reset to drive the upper end of the connecting rod 26 to move downwards, the driving piece 27 drives the switch driving piece 24 to rotate, and the engine 1 is restarted. The upper end of the connecting rod 26 is hinged with a hook 28, the starting and stopping of the engine 1 can be manually controlled through the hook 28, and the use is convenient. In this embodiment, the driving member 27 may also be a pull rod or an iron chain during actual manufacturing.

Example 2

As shown in fig. 6, the present embodiment has the same structure and principle as those of embodiment 1, except that in this embodiment, a support 25 is fixedly connected to the pump head 2, the start-stop device includes a connecting rod 26, a gear 29 is fixedly connected to a lower end of the connecting rod 26, a rack 30 is provided at an outer end of the valve rod 10, the connecting rod 26 is hinged to the support 25, the gear 29 is meshed with the rack 30, a driving member 27 is connected between an upper end of the connecting rod 26 and the switch toggle member 24, and the driving member 27 is a steel cable. The outward movement of the valve rod 10 causes the rack 30 to drive the gear 29 to rotate, so that the upper end of the connecting rod 26 moves downwards, the driving member 27 drives the switch trip member 24 to rotate, the engine 1 stops working, the downward movement of the valve rod 10 is reset to drive the upper end of the connecting rod 26 to move upwards, the driving member 27 drives the switch trip member 24 to rotate, and the engine 1 restarts.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. The utility model provides a high-pressure pump, includes engine (1) and pump head (2), pump head (2) intake opening (3) and apopore (4) that communicate each other have, its characterized in that, pump head (2) on be equipped with and be located the air-vent valve in order to adjust water pressure between intake opening (3) and apopore (4), pump head (2) on still be equipped with when apopore (4) superpressure with stop engine (1) work, apopore (4) pressure normally with the start-stop device that starts the agricultural machinery work.

2. The high pressure pump of claim 1, wherein the pressure regulating valve and the start/stop device are integrated.

3. A high-pressure pump according to claim 1 or 2, characterized in that the pump head (2) is provided with an intermediate chamber (5) and a mounting hole for mounting a pressure regulating valve, the inner end of the mounting hole is communicated with the water outlet hole (4), the pump head (2) is provided with a water through hole (6) for communicating the intermediate chamber (5) and the water outlet hole (4) and a pressure relief hole (7) for communicating the intermediate chamber (5) and the pressure regulating valve.

4. A high-pressure pump according to claim 3, characterized in that the water through hole (6) is provided with a one-way valve one (8) for allowing water to flow from the water outlet hole (4) to the intermediate chamber (5), and the pressure relief hole (7) is provided with a one-way valve two (9) for allowing water to flow from the intermediate chamber (5) to the pressure relief valve.

5. The high-pressure pump according to claim 4, wherein the pressure regulating valve comprises a valve rod (10), an upper valve body (11) and a cylindrical lower valve body (12), the upper valve body (11) and the lower valve body (12) are hermetically and fixedly connected in the mounting hole, the upper valve body (11) is cylindrical and has a top cover (13) at the top end, the bottom end of the upper valve body (11) is connected to the top of the lower valve body (12), the valve rod (10) penetrates through the top cover (13), a spring (14) is arranged between the valve rod (10) and the top cover (13) and provided with elastic force, so that the bottom end of the valve rod (10) tends to be sealed in the lower valve body (12), the lower valve body (12) radially penetrates through a plurality of water inlet holes (15) communicated with the pressure relief hole (7), a sealing ring (16) sealed in the lower valve body (12) is embedded in the valve rod (10), and the valve rod (10) is arranged below and below the sealing ring (16) and the lower valve ring (16) and the valve rod (10) is embedded in the sealing A liquid passing cavity (17) communicated with the water inlet hole (15) is arranged between the valve bodies (12).

6. The high-pressure pump according to claim 5, wherein a water return hole (18) communicated with the water outlet hole (4) is formed in the pump head (2), a water return gap (19) communicated with the water return hole (18) is formed between the upper valve body (11) and the lower valve body (12) and the mounting hole, a check valve III (20) enabling water to flow from the water outlet hole (4) to the water outlet gap (19) is arranged in the water return hole (18), the lower valve body (12) is provided with a water return through hole (21) which is radially communicated with the water return gap (19), a sealing ring II (22) is embedded in the valve rod (10), the sealing ring II (22) is arranged closer to the top of the valve rod (10) than the sealing ring I (16), the water return through hole (21) is formed between the sealing ring I (16) and the sealing ring II (22), and the valve rod (10) is provided with a water return through hole (21) which is communicated with the water return through hole (21) and is formed between the sealing ring I (16) and the sealing ring II (22 Annular groove (23), start and stop the device and install in valve rod (10) and stretch out between the outer end of valve body (11) and the switch that engine (1) had trip piece (24), after water return hole (18), return water clearance (19), return water through-hole (21) intake in order to drive valve rod (10) move outward start-stop the device drive switch trip piece (24) rotate and make engine (1) stop work, after valve rod (10) reset start-stop the device drive switch trip piece (24) rotate and make engine (1) start.

7. A high pressure pump according to claim 6, wherein the pump head (2) is fixedly connected with a bracket (25), the start-stop device comprises a connecting rod (26) with a lower end hinged with the bracket (25), the outer end of the valve rod (10) is hinged on a rod body of the connecting rod (26) close to the lower end, and a driving piece (27) is connected between the upper end of the connecting rod (26) and the switch trip piece (24).

8. A high-pressure pump according to claim 7, characterized in that the upper end of the connecting rod (26) is hinged to a hook (28).

9. A high pressure pump according to claim 6, wherein the pump head (2) is fixedly connected with a support (25), the start-stop device comprises a connecting rod (26), the lower end of the connecting rod (26) is fixedly connected with a gear (29), the outer end of the valve rod (10) is provided with a rack (30), the connecting rod (26) is hinged on the support (25), the gear (29) is meshed with the rack (30), and a driving member (27) is connected between the upper end of the connecting rod (26) and the switch toggle member (24).

10. A high-pressure pump according to claim 7, characterized in that the driving member (27) is a steel cable or a tie rod or an iron chain.