CN110685897A

CN110685897A - Plunger pump and corresponding cleaning machine

Info

Publication number: CN110685897A
Application number: CN201910966478.2A
Authority: CN
Inventors: 陆为东; 陈海辉
Original assignee: Suzhou Ousheng Electrical Ltd By Share Ltd
Current assignee: Suzhou Ousheng Electrical Ltd By Share Ltd
Priority date: 2017-06-18
Filing date: 2017-06-18
Publication date: 2020-01-14
Also published as: CN107701388A; CN107701388B

Abstract

The plunger pump is provided with a first water outlet cavity, a second water outlet cavity, a first cavity wall for separating the first water outlet cavity from the second water outlet cavity, and a first through hole penetrating through the first cavity wall to communicate the first water outlet cavity with the second water outlet cavity, wherein the outer end of the first water outlet cavity is provided with a first port, the outer end of the second water outlet cavity is provided with a second port, the projection formed by projecting the first port along a first direction can completely cover the projection formed by projecting the first through hole along the first direction, and the first direction is parallel to the central axis of the first through hole. This design makes things convenient for equipment to go through first port processing, shaping or handle first through-hole.

Description

Plunger pump and corresponding cleaning machine

[ technical field ] A method for producing a semiconductor device

The invention relates to a plunger pump and a corresponding cleaning machine.

[ background of the invention ]

Plunger pump is a common pump, and is very common in the cleaning machine especially domestic cleaning machine field, and the pump cover is equipped with a plurality of play water cavities side by side usually, for making these play water cavities communicate, adopts drill bit or other instrument to directly run through out the water cavity from the pump cover side among the prior art, can leave a tool hole in the pump cover side after having link up these play water cavities, consequently still needs the process and the material of extra shutoff tool hole, the material and the process cost that increase undoubtedly.

[ summary of the invention ]

The invention aims to provide a plunger pump with reduced cost.

In order to solve the technical problems, the invention adopts the following technical scheme: a plunger pump cover is provided with a first water outlet cavity, a second water outlet cavity, a first cavity wall for separating the first water outlet cavity from the second water outlet cavity, and a first through hole penetrating through the first cavity wall to communicate the first water outlet cavity with the second water outlet cavity, wherein the outer end of the first water outlet cavity is provided with a first port, the outer end of the second water outlet cavity is provided with a second port, the projection formed by projecting the first port along a first direction can completely cover the projection formed by projecting the first through hole along the first direction, and the first direction is parallel to the central axis of the first through hole.

The projection that this design first port formed along the projection of first direction projection can shadow completely and cover first through-hole and throw the projection that forms along first direction, makes things convenient for equipment to go through first port processing, shaping or handle first through-hole, avoids producing unnecessary hole to need not to increase shutoff materials such as extra end cap, reduced material and assembly cost.

Furthermore, the plunger pump cover further comprises a third water outlet cavity, a second cavity wall for separating the second water outlet cavity from the third water outlet cavity, and a second through hole penetrating through the second cavity wall to communicate the second water outlet cavity with the third water outlet cavity, wherein a third port is arranged at the outer end of the third water outlet cavity, a projection formed by projecting the second port or the third port along a second direction can completely cover a projection formed by projecting the second through hole along the second direction, and the second direction is parallel to the central axis of the second through hole.

Furthermore, the central axis of the first through hole is parallel to the central axis of the second through hole, the first water outlet cavity, the second water outlet cavity and the third water outlet cavity are arranged in parallel, and the second water outlet cavity is positioned between the first water outlet cavity and the third water outlet cavity.

Furthermore, the first through hole and the second through hole are symmetrically arranged, the first water outlet cavity, the second water outlet cavity and the third water outlet cavity are arranged in parallel, and the third water outlet cavity is positioned between the first water outlet cavity and the second water outlet cavity.

Furthermore, the central axis of the first through hole and the central axis of the second through hole form an included angle of 80-100 degrees, the first water outlet cavity, the second water outlet cavity and the third water outlet cavity are arranged in parallel, and the third water outlet cavity is positioned between the first water outlet cavity and the second water outlet cavity.

Further, the first port, the second port, and the third port are aligned.

Furthermore, the first port, the second port and the third port are arranged in a row.

Furthermore, the first through hole is overlapped with the second through hole in a fifth direction, the fifth direction is perpendicular to the central axis of the first water outlet cavity, and the fifth direction is parallel to the plane where the central axis of the first water outlet cavity and the central axis of the second water outlet cavity are located.

Furthermore, the projection formed by projecting the second port along the second direction can completely cover the projection formed by projecting the second through hole along the second direction, and the second through hole is a drilled hole which obliquely faces the second port; or, the projection of the third port projected along the second direction may completely cover the projection of the second through hole projected along the second direction, and the second through hole is a drilled hole obliquely facing the third port.

Furthermore, the first water outlet cavity, the second water outlet cavity and the third water outlet cavity are arranged in parallel, the third water outlet cavity is positioned between the first water outlet cavity and the second water outlet cavity, the first through hole is drilled after the drill bit enters the first water outlet cavity through the first port, the second through hole is drilled after the drill bit enters the second water outlet cavity through the second port or the second through hole is drilled after the drill bit enters the third water outlet cavity through the third port.

Furthermore, the first water outlet cavity and the second water outlet cavity are arranged in parallel, and the first port is aligned with the second port.

Furthermore, the first through hole comprises a first communicating port and a second communicating port which are positioned at two opposite ends of the first through hole, the first communicating port is positioned between the second communicating port and the first water outlet cavity, the first communicating port and the second communicating port are respectively staggered with the first port in a third direction, the first communicating port and the second communicating port are partially overlapped or staggered in the third direction, and the third direction is perpendicular to the central axis of the first water outlet cavity and is parallel to the plane where the central axis of the first water outlet cavity and the central axis of the second water outlet cavity are positioned.

Furthermore, the plunger pump cover also comprises a first partial stop valve hole which is communicated with the second water outlet cavity and is used for partially accommodating the stop valve, and the first partial stop valve hole extends into the pump cover from the surface of the pump cover.

Furthermore, the first water outlet cavity is communicated with the first part stop valve hole through the first through hole and the second water outlet cavity in sequence.

Furthermore, the plunger pump cover further comprises a third water outlet cavity, a second cavity wall for separating the third water outlet cavity from the second water outlet cavity, and a second through hole penetrating through the second cavity wall to communicate the third water outlet cavity with the second water outlet cavity, wherein the third water outlet cavity is communicated with the first part stop valve hole through the second through hole and the second water outlet cavity in sequence.

Furthermore, the first water outlet cavity, the second water outlet cavity and the third water outlet cavity are arranged in parallel, and the second water outlet cavity is positioned between the first water outlet cavity and the third water outlet cavity.

Furthermore, the first partial stop valve hole comprises a hole main body and a fourth communicating hole, the pump cover further comprises a third cavity wall for separating the second water outlet cavity from the hole main body, and the fourth communicating hole penetrates through the third cavity wall to communicate the second water outlet cavity with the hole main body.

Furthermore, the first partial stop valve hole is partially overlapped with the second water outlet cavity in a fourth direction and is completely staggered with the first water outlet cavity, and the fourth direction is perpendicular to the plane where the central axis of the first water outlet cavity and the central axis of the second water outlet cavity are located.

Furthermore, the plunger pump cover also comprises a third water outlet cavity which is arranged in parallel with the second water outlet cavity, and the first part stop valve hole and the third water outlet cavity are completely staggered in the fourth direction.

Furthermore, the plunger pump cover further comprises a first plunger hole, a second plunger hole, a first communicating hole extending from the first water outlet cavity to the first plunger hole, and a second communicating hole extending from the second water outlet cavity to the second plunger hole, wherein the first port and the first communicating hole are located on two opposite sides of the first water outlet cavity, and the second port and the second communicating hole are located on two opposite sides of the second water outlet cavity.

Further, the first through hole is a bore inclined toward the first port.

Furthermore, the central axis of the first through hole and the central axis of the first water outlet cavity form an included angle of 40-55 degrees.

Furthermore, the first through hole comprises a first communication port and a second communication port which are arranged at two opposite ends of the first through hole, the first communication port is arranged between the second communication port and the first water outlet cavity, and the vertical distance from the center of the first communication port to the first port is smaller than the vertical distance from the center of the second communication port to the first port.

The invention also provides a plunger pump which comprises the plunger pump cover.

Furthermore, the plunger pump cover also comprises a first plug for plugging the first port and a second plug for plugging the second port.

Furthermore, the plunger pump cover also comprises a pump body, a first plunger, a second plunger and a stop valve, wherein the pump body is assembled with the pump cover, the pump body is provided with a first plunger through hole for the first plunger to pass through, a second plunger through hole for the second plunger to pass through, and a second partial stop valve hole for partially accommodating the stop valve.

Furthermore, the plunger pump cover also comprises a first one-way valve which can be arranged in the first water outlet cavity through the first port and a second one-way valve which can be arranged in the second water outlet cavity through the second port.

The invention also provides a cleaning machine which comprises the plunger pump.

The invention also provides a cleaning machine, which comprises a plunger pump, wherein the plunger pump comprises a pump cover, the pump cover is provided with a first water outlet cavity, a second water outlet cavity, a first cavity wall for separating the first water outlet cavity from the second water outlet cavity, and a first through hole penetrating through the first cavity wall to communicate the first water outlet cavity with the second water outlet cavity, the first water outlet cavity is provided with a first port, the second water outlet cavity is provided with a second port, the cleaning machine further comprises a first one-way valve capable of being arranged in the first water outlet cavity through the first port and a second one-way valve capable of being arranged in the second water outlet cavity through the second port, the projection formed by projecting the first through hole along a first direction comprises the projection formed by projecting the first port along the first direction, and the first direction is parallel to the central axis of the first through hole.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

FIG. 1 is a perspective view of a plunger pump of the present invention;

FIG. 2 is a schematic diagram of the pump cover, check valve, and plug of the present invention separated from each other;

FIG. 3 is a perspective view of the pump cover of the present invention at an angle;

FIG. 4 is a perspective view of another angle of the pump cover (directly opposite to the first through hole) according to the present invention;

FIG. 5 is a perspective view of yet another angle (directly opposite the first partial stop valve opening) of the pump cap of the present invention;

FIG. 6 is a cross-sectional view of FIG. 5 (the cross-section is the plane of the central axis of the first outlet chamber and the central axis of the first outlet chamber);

FIG. 7 is a schematic view of a pump cover and a stop valve of the present invention (with a check valve and a plug installed on the pump cover);

FIG. 8 is an angled perspective view of the pump body of the present invention;

FIG. 9 is an exploded view of the shaft, first bearing, swashplate and thrust bearing of the present invention;

FIG. 10 is another angled view of FIG. 9;

FIG. 11 is a cross-sectional view of the plunger pump of the present invention;

fig. 12 is a partially enlarged view of fig. 11.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

A cleaning machine is a common cleaning device and is commonly used for cleaning automobiles, particularly small cars, walls, floors, booths and the like. The cleaning machine comprises a plunger pump, a shell, wheels, a handle, a water inlet pipe with a water joint, a water outlet hose with a joint and a water gun. The wheels are located at the bottom of the washer for moving the washer. The handle is connected to the housing and is disposed on a top or side of the washing machine for moving the washing machine. The shell can be a plastic shell or a metal shell, and the plunger pump is contained in the shell. The water inlet pipe is used for externally connecting a water source such as tap water and introducing the external water source into the plunger pump. The water outlet hose is used for connecting the plunger pump and the water gun and spraying water pressed out by the plunger pump through the water gun.

Referring to fig. 1 to 12, the plunger pump includes a swash plate 1, a motor 2, a first bearing 30, a second bearing 31, a thrust bearing 4, a stop valve 50, an oil cylinder 60, a pump body 61, a pump cover 7, and a plurality of plunger assemblies 8. The rated power of the motor 2 is between 700w and 3500w, such as 750w, 1000w, 1500w, 2000w, 2200w and 2500w, the motor 2 includes a stator 20, a rotor 21 and a cooling fan 22, the cooling fan 22 and the swash plate 1 are located on two opposite sides of the motor 2, the rotor 21 includes a rotating shaft 23 and a rotor winding 24 located on the periphery of the rotating shaft 23, a first bearing 30 and a second bearing 31 are located on two opposite sides of the rotor winding 24, the motor 2 further includes a fan housing 25 for accommodating the cooling fan 22, the cooling fan 22 and the second bearing 31 are located in the fan housing 25, the fan housing 25 has an air inlet 250 facing the cooling fan 22, a projection projected along a sixth direction of the cooling fan 22 and a projection projected along the sixth direction of the air inlet 250 are at least partially overlapped, and the sixth direction is parallel to the rotating shaft 23. The pivot hole 10 has been seted up to swash plate 1, pivot 23 insert in pivot hole 10 for drive swash plate 1 rotates, and plunger subassembly 8 directly or indirectly supports to press in swash plate 1 in order to prevent swash plate 1 along pivot 23 to axial displacement, stands upside down and gets rid of after plunger subassembly 8 supports directly or indirectly to pressing swash plate 1, and swash plate 1 can be along the downward landing of pivot 23 under self action of gravity. The plunger pump is inverted, namely the plunger pump is in the following position states: the plunger pump motor shaft 23 is in a vertical position and the swash plate 1 is on the upper side of the thrust bearing 4. The stop valve 50 is a one-way valve with good sealing performance, can well maintain water pressure after the gun is shut down, and is beneficial to maintaining pressure during the gun is shut down so as to keep the gun of the cleaning machine shut down.

The rotating shaft 23 passes through the inner ring 300 of the first bearing 30 and is fixed with the inner ring 300, the swash plate 1 is located between the first bearing 30 and the plunger assembly 8, and the plunger assembly 8 directly or indirectly presses against the swash plate 1 so that the swash plate 1 presses against the inner ring 300 of the first bearing 30. In this embodiment, the plunger assembly 8 indirectly presses against the swash plate 1, and after the plunger pump is inverted and the indirect pressing of the plunger assembly 8 against the swash plate 1 is removed, the swash plate 1 can slide down along the rotating shaft 23 under the action of self gravity.

Thrust bearing 4 assembles in sloping cam plate 1, and thrust bearing 4 is located between sloping cam plate 1 and plunger subassembly 8, and plunger subassembly 8 supports to press in thrust bearing 4 and indirectly support to press in sloping cam plate 1, stands upside down and gets rid of plunger subassembly 8 and to thrust bearing 4 support after, and sloping cam plate 1 and thrust bearing 4 can be along the landing downwards of pivot 23 under self action of gravity. The swash plate 1 is located between the first bearing 30 and the thrust bearing 4, and the plunger assembly 8 is pressed against the thrust bearing 4 and indirectly pressed against the swash plate 1, so that the swash plate 1 is pressed against the inner ring 300.

The swash plate 1, the thrust bearing 4 and the first bearing 30 are positioned in the oil cylinder 60, the rotating shaft 23 extends into the oil cylinder 60, and the outer ring 301 of the first bearing 30 is fixed with the oil cylinder 60.

The plunger assembly 8 includes a plunger (the plunger pump of the present embodiment is a three-plunger pump, and for convenience of description, the plunger may be divided into a first plunger 80, a second plunger 81, and a third plunger (not shown)), a retainer ring provided at one end of the plunger (including a first retainer ring 82 provided on the first plunger 80, a second retainer ring 83 provided on the second plunger 81, and a third retainer ring (not shown) provided on the third plunger), and a return spring sleeved on the plunger (including a first return spring 84 sleeved on the first plunger 80, a second return spring 85 sleeved on the second plunger 81, and a third return spring (not shown) sleeved on the third plunger), and the return spring presses the retainer ring toward the thrust bearing 4 so that the plunger presses the thrust bearing 4. In this embodiment, the thrust bearing 4 is a thrust ball bearing, the thrust bearing 4 includes a first ring 40, a second ring 41, a ball retainer 42 located between the first ring 40 and the second ring 41, and a plurality of balls 43 located on the ball retainer 42, the ball retainer 42 is annular, the second ring 41 is located between the first ring 40 and the plunger assembly 8, the plunger assembly 8 abuts against the second ring 41 and indirectly abuts against the swash plate 1, when the plunger pump is inverted and the second ring 41 is removed from the plunger assembly 8, the swash plate 1 and the thrust bearing 4 can fall off from the rotating shaft 23 under the action of their own gravity, the plunger assembly 8 directly or indirectly abuts against the swash plate 1 to prevent the swash plate 1 from moving along the rotating shaft 23 in a direction away from the motor 2, when the plunger pump is inverted and the plunger assembly 8 is removed from directly or indirectly abutting against the swash plate 1, the swash plate 1 may fall off the rotary shaft 23 by its own weight. When the plunger pump is inverted and the pressing of the plunger assembly 8 on the thrust bearing 4 is removed, the swash plate 1 and the thrust bearing 4 can fall under the action of self gravity. The swash plate 1 is constrained in a predetermined position relative to the rotary shaft 23 by direct or indirect pressing thereof by the plunger assembly 8. After the direct or indirect pressing of the plunger assembly 8 against the swash plate 1 is removed, the swash plate 1 is in an unseated state on the rotating shaft 23, that is, the swash plate 1 can move in the axial direction of the rotating shaft 23.

The swash plate 1 includes a first annular flange 11, a second annular flange 12, a third annular flange 13, an annular tilting body 14, and a plurality of reinforcing ribs 15 (see fig. 9, there are 8 reinforcing ribs 15, these reinforcing ribs 15 surround the periphery of the third annular flange 13), the outer diameter of the second annular flange 12 is smaller than that of the first annular flange 11, a first ring 40 is assembled on the first annular flange 11, a second ring 41 surrounds the second annular flange 12, the first annular flange 11 and the third annular flange 13 are located on opposite sides of the annular tilting body 14, the first ring 40 abuts against the inclined surface 140 of the annular tilting body 14, and the reinforcing ribs 15 are respectively connected with the third annular flange 13 and the annular tilting body 14. The third annular flange 13 is pressed against the inner ring 300 of the first bearing 30.

Swash plate 1 and pivot 23 clearance fit, be equipped with first flat position 100 in the pivot hole 10, pivot 23 is equipped with the second flat position 230 that is used for driving swash plate 1 pivoted that corresponds first flat position 100, radiator fan 22 is fixed in the one end of pivot 23, radiator fan 22 is located the opposite both ends of pivot 23 with second flat position 230, first flat position 100 faces second flat position 230, when pivot 23 rotates, first flat position 100 transmits the turning force for second flat position 230, in order to drive swash plate 1 through second flat position 230 and rotate. The rotating shaft hole 10 comprises a first hole section 101, a second hole section 102 and a first step surface 103 located between the first hole section 101 and the second hole section 102, the first flat position 100 is arranged in the first hole section 101, the diameter of the first hole section 101 is smaller than that of the second hole section 102, the rotating shaft 23 comprises a first shaft section 231, a second shaft section 232 and a second step surface 233 located between the first shaft section 231 and the second shaft section 232, the first shaft section 231 is located at the tail end of the rotating shaft 23, the second flat position 230 is arranged on the outer side of the first shaft section 231, the first shaft section 231 is inserted into the first hole section 101, the second shaft section 232 is inserted into the second hole section 102, and the diameter of the first shaft section 231 is smaller than that of the second shaft section 232. The first shaft section 231 is in clearance fit with the first bore section 101, and the diameter of the first shaft section 231 is 0.02mm to 0.08mm, preferably 0.03mm or 0.04mm smaller than the diameter of the first bore section 101; the second shaft section 232 is in clearance fit with the second hole section 102, and the diameter of the second shaft section 232 is 0.01mm to 0.06mm, preferably 0.02mm smaller than that of the second hole section 102; above clearance has been taken into account and has been made things convenient for dismouting and pivot 23 to the steady drive of sloping cam plate 1, realizes that pivot 23 can be stable drive sloping cam plate 1 rotates, can relax the directness with sloping cam plate 1 cover on pivot 23, can relax the directness after getting rid of the plunger subassembly when needs are dismantled and take off sloping cam plate 1 from pivot 23. The first step surface 103 is opposite to the second step surface 233 at a distance, and the distance between the first step surface 103 and the second step is 0.25mm to 1mm, preferably 0.5 mm. The first shaft section 231 has a diameter of 14mm and the second shaft section 232 has a diameter of 15 mm.

The pump body 61 is fixed between the oil cylinder 60 and the pump cover 7, the pump body 61 is provided with a plurality of plunger through holes, and the pump body 61 is provided with a water inlet 611 facing one side and a water outlet 612 facing the opposite side; the pump body 61 is integrally provided with a water inlet pipe 613 extending towards one side and a water outlet pipe 614 extending towards the opposite side, the water inlet 611 is located at the end of the water inlet pipe 613, and the water outlet 612 is located at the end of the water outlet pipe 614.

In the present embodiment, the swash plate 1 is limited to a predetermined position with respect to the rotating shaft 23 by the plunger assembly 8 indirectly pressing against it, and further, the plunger assembly 8 indirectly presses against the swash plate 1 by pressing against the thrust bearing 4 so that the swash plate 1 is limited to a predetermined position with respect to the rotating shaft 23. After the plunger assemblies 8 are removed, the swash plate 1 is in an un-positioned state relative to the rotating shaft 4, and the swash plate 1 and the thrust bearing 4 can be directly taken off from the rotating shaft 23; in the prior art, the swash plate 1 cannot be directly taken down after the abutting pressure of the plunger assembly 8 is removed, and the swash plate 1 can be taken down from the rotating shaft 23 only by removing a locking mechanism or tight interference meshing between the swash plate 1 and the rotating shaft 23.

The pump cover 7 is provided with a first water outlet cavity 70, a second water outlet cavity 71, a third water outlet cavity 72, a first cavity wall 73, a second cavity wall 74, a first through hole 75 and a second through hole 76, the first cavity wall 73 separates the first water outlet cavity 70 from the second water outlet cavity 71, the second cavity wall 74 separates the second water outlet cavity 71 from the third water outlet cavity 72, the first through hole 75 penetrates through the first cavity wall 73 to communicate the first water outlet cavity 70 with the second water outlet cavity 71, the second through hole 76 penetrates through the second cavity wall 74 to communicate the second water outlet cavity 71 with the third water outlet cavity 72, the outer end of the first water outlet cavity 70 is provided with a first port 700, the outer end of the second water outlet cavity 71 is provided with a second port 710, the outer end of the third water outlet cavity 72 is provided with a third port 720, a projection formed by projecting the first port 700 along a first direction can completely cover a projection formed by projecting the first through hole 75 along the first direction, the first direction is parallel to a central axis 75A of the first through hole, the central axis a of the first through hole 75 is perpendicular to the rotating shaft 23, and the projection projected along the first direction by the first through hole 75 includes the projection projected along the first direction by the first port 700. The central axis C of the first water outlet cavity 70 is perpendicular to the rotating shaft 23, the central axis D of the second water outlet cavity 71 is perpendicular to the rotating shaft 23, the central axis E of the third water outlet cavity 72 is perpendicular to the rotating shaft 23, the central axis C of the first water outlet cavity 70 is parallel to the central axis E of the third water outlet cavity 72, and the central axis D of the second water outlet cavity 71 is parallel to the central axis E of the third water outlet cavity 72.

The projection of the second port 710 projected along a second direction may completely cover the projection of the second through hole 76 projected along the second direction, the second direction is parallel to the central axis B of the second through hole 76, and the projection of the second through hole 76 projected along the second direction includes the projection of the second port 710 projected along the second direction. The first water outlet cavity 70, the second water outlet cavity 71 and the third water outlet cavity 72 are arranged in parallel, the second water outlet cavity 71 is located between the first water outlet cavity 70 and the third water outlet cavity 72, and the central axis A of the first through hole 75 is parallel to the central axis B of the second through hole 76. The first port 700, the second port 710, and the third port 720 are aligned, and the first port 700, the second port 710, and the third port 720 are arranged in a row. The first through hole 75 overlaps the second through hole 76 in a fifth direction, the fifth direction is perpendicular to the central axis C of the first water outlet cavity 70, the fifth direction is parallel to the plane where the central axis C of the first water outlet cavity 70 and the central axis D of the second water outlet cavity 71 are located, the fifth direction is inclined to the central axis a of the first through hole 75, and an included angle between the central axis a of the first through hole 75 and the fifth direction is 35-50 degrees. The first through hole 75 is a bore inclined toward the first port 700. The central axis A of the first through hole 75 and the central axis C of the first water outlet cavity 70 form an included angle of 40 to 55 degrees. The vertical distance from the center of the first communication port 750 to the first port 700 is smaller than the vertical distance from the center of the second communication port 751 to the first port 700 by 3.5mm to 6 mm. The first bore 75 is drilled by a drill bit through the first port 700 into the first exit chamber 70 and the second bore 76 is drilled by a drill bit through the second port 710 into the second exit chamber 71. The first through hole 75 is an inclined hole penetrating the first cavity wall 73, the first through hole 75 faces the first port 700, and the second through hole 76 faces the second port 710. The second through-hole 76 extends obliquely through the second chamber wall 74. The second through hole 76 may be a bore that is angled toward the second port 710. The first and second through

holes

75, 76 may also be milled holes, laser drilled holes, etc., preferably drilled holes.

First through-hole 75 is the round hole, including first intercommunication mouth 750 and the second intercommunication mouth 751 that is located its opposite both ends, first intercommunication mouth 750 is located between second intercommunication mouth 751 and the first exhalant chamber 70, first intercommunication mouth 750 and second intercommunication mouth 751 stagger completely with first port 700 respectively in a third direction, first intercommunication mouth 750 overlaps or staggers completely with second intercommunication mouth 751 in the third direction partially, third direction perpendicular to first exhalant chamber 70 axis C and be on a plane with second exhalant chamber 71 axis D place in first exhalant chamber 70 axis C. The first communication port 750 is obliquely opposed to the second communication port 751, and the second communication port 751 is exposed to the first port 700 via the first communication port 750. The second through hole 76 is a circular hole, the second through hole 76 includes a third communication port 760 and a fourth communication port 761 located at opposite ends thereof and obliquely facing each other, the third communication port 760 is located between the fourth communication port 761 and the second outlet chamber 71, and the fourth communication port 761 is exposed to the second port 710 via the third communication port 760 or the third communication port 760 is exposed to the third port 720 via the fourth communication port 761. The first through-hole 75 is parallel to the second through-hole 76, which facilitates more efficient formation of the through-hole.

It can also be designed as follows: the projection projected by the third port 720 along the second direction can completely cover the projection projected by the second through hole 76 along the second direction, the first through hole 75 and the second through hole 76 are symmetrically arranged, an included angle of 80-100 degrees is formed between a central axis a of the first through hole 75 and a central axis B of the second through hole 76, the projection projected by the third port 720 along the second direction can completely cover the projection projected by the second through hole 76 along the second direction, the second through hole 76 is a drill hole obliquely facing the third port 720, the second through hole 76 is drilled after a drill enters the third water outlet cavity 72 through the third port 720, the second through hole 76 is an oblique hole facing the third port 720, and the third communication port 760 is exposed to the third port 720 through the fourth communication port 761.

The pump cover 7 further includes a first partial cut-off valve hole 77 for partially receiving the cut-off valve 50, the first partial cut-off valve hole 77 communicates with the second outlet chamber 71, and the first partial cut-off valve hole 77 extends from the surface of the pump cover 7 into the pump cover 7. The first water outlet cavity 70 is communicated with the first partial stop valve hole 77 through the first through hole 75 and the second water outlet cavity 71 in sequence, and the third water outlet cavity 72 is communicated with the first partial stop valve hole 77 through the second through hole 76 and the second water outlet cavity 71 in sequence. The first partial cut-off valve hole 77 comprises a hole main body 770 and a fourth communication hole 771, the pump cover 7 further comprises a third cavity wall 78 for separating the second water outlet cavity 71 from the hole main body 770, and the fourth communication hole 771 penetrates through the third cavity wall 78 to communicate the second water outlet cavity 71 with the hole main body 770. The first partial stop valve opening 77 partially overlaps the second outlet chamber 71 and is completely offset from the first outlet chamber 70 in a fourth direction perpendicular to the plane of the central axis C of the first outlet chamber 70 and the central axis D of the second outlet chamber 71, and the first partial stop valve opening 77 is completely offset from the third outlet chamber 72 in the fourth direction. The fourth direction is parallel to the rotation axis 23.

Pump cover 7 further includes a first plunger hole 790, a second plunger hole 791, a third plunger hole 792, a first communication hole 793, a second communication hole 794, a third communication hole 795, a first water inlet hole 796, a second water inlet hole 797, a third water inlet hole 798, the first water inlet hole 796 extending to the first communication hole 793, the first water inlet hole 796 partially housing the first water inlet valve, the second water inlet hole 797 extending to the second communication hole 794, the second water inlet hole 797 partially housing the second water inlet valve 7957, the third water inlet hole 798 extending to the third communication hole 795, the third water inlet hole 798 partially housing the third water inlet valve, the first plunger hole 790 indirectly communicating with the first outlet chamber 70, the second plunger hole 791 indirectly communicating with the second outlet chamber 7971, the third plunger hole 792 indirectly communicating with the third outlet chamber 72, the first communication hole 3 extending from the first outlet chamber 70 to the first plunger hole 790, the second outlet hole 794 extending from the second outlet chamber 7971 to the plunger hole 791, the third communication hole 795 extends from the third water outlet chamber 72 to the third plunger hole 792, the first port 700 and the first communication hole 793 are located on opposite sides of the first water outlet chamber 70, the second port 710 and the second communication hole 794 are located on opposite sides of the second water outlet chamber 71, and the third port 720 and the third communication hole 795 are located on opposite sides of the third water outlet chamber 72.

The plunger pump further comprises a first plug 51, a second plug 52 and a third plug 53, wherein the first plug 51, the second plug 52 and the third plug 53 can be independent or integrated, the first plug 51 is in threaded connection with threads in the first water outlet cavity 70, the second plug 52 is in threaded connection with threads in the second water outlet cavity 71, the third plug 53 is in threaded connection with threads in the third water outlet cavity 72, the first plug 51 blocks the first port 700, the second plug 52 blocks the second port 710, the third plug 53 blocks the third port 720, the pump body 61 is assembled with the pump cover 7, and the pump body 61 is provided with a first plug through hole 615 for the first plug 80 to pass through, a second plug through hole 616 for the second plug 81 to pass through, a third plug through hole 618 for the third plug to pass through, and a second partial stop valve hole 619 for partially accommodating the stop valve 50. The first partial shut-off valve bore 77 is opposite the second partial shut-off valve bore 619, which forms a complete shut-off valve bore to accommodate the entire shut-off valve 50. The plunger pump also includes a first one-way valve 54 that is loadable into the first outlet chamber 70 through the first port 700, a second one-way valve 55 that is loadable into the second outlet chamber 71 through the second port 710, and a third one-way valve 56 that is loadable into the third outlet chamber 72 through the third port 720. The first check valve 54, the second check valve 55, and the third check valve 56 may be independent or integrated.

When the plunger pump works, liquid (for example, water) enters the plunger pump through the water inlet pipe 613, then the liquid is divided into three paths, one path of the liquid enters the first communicating hole 793 through the first water inlet hole 796, enters the first water outlet cavity 70 through the first communicating hole 793 and the first one-way valve 54 in sequence under the pressurization of the first plunger 80, and then enters the second water outlet cavity 71 through the first communicating hole 75; one path of liquid enters the second communicating hole 794 from the second water inlet hole 797, and after the second plunger 81 is pressurized, the other path of liquid enters the second water outlet cavity 71 through the second communicating hole 794 and the second one-way valve 55 in sequence; one path of liquid enters the third communicating hole 795 through the third water inlet 798, sequentially enters the third water outlet cavity 72 through the third communicating hole 795 and the third one-way valve 56 under the pressurization of the third plunger, and then enters the second water outlet cavity 71 through the second communicating hole 76; the liquid merged into the second water outlet cavity 71 further flows downstream through the stop valve 50, then further flows through the water outlet pipe 614 after passing through the stop valve 50, and finally is sprayed out by the water gun.

While the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims

1. The utility model provides a plunger pump, is equipped with first out the water cavity, the second goes out the water cavity, the first chamber wall of the first play water cavity of interval and second play water cavity, runs through the first through-hole that the first chamber wall goes out the water cavity with first play water cavity of intercommunication and second, and the outer end in first play water cavity is equipped with first port, and the outer end in second play water cavity is equipped with second port, its characterized in that: the projection formed by projecting the first port along a first direction can completely cover the projection formed by projecting the first through hole along the first direction, and the first direction is parallel to the central axis of the first through hole.

2. The plunger pump of claim 1, wherein: the water outlet device also comprises a third water outlet cavity, a second cavity wall for separating the second water outlet cavity from the third water outlet cavity, and a second through hole penetrating through the second cavity wall to communicate the second water outlet cavity with the third water outlet cavity, wherein a third port is arranged at the outer end of the third water outlet cavity, the projection formed by projecting the second port or the third port along a second direction can completely cover the projection formed by projecting the second through hole along the second direction, and the second direction is parallel to the central axis of the second through hole.

3. The plunger pump of claim 2, wherein: the first through hole is overlapped with the second through hole in a fifth direction, the fifth direction is perpendicular to the central axis of the first water outlet cavity, and the fifth direction is parallel to the plane where the central axis of the first water outlet cavity and the central axis of the second water outlet cavity are located.

4. The plunger pump of claim 2, wherein: the first water outlet cavity, the second water outlet cavity and the third water outlet cavity are arranged in parallel, the third water outlet cavity is located between the first water outlet cavity and the second water outlet cavity, the projection formed by projecting the second port along the second direction can completely cover the projection formed by projecting the second through hole along the second direction, the first through hole is a drill hole which is inclined towards the first port, the second through hole is a drill hole which is inclined towards the second port, the first through hole is drilled out through the first port, the second through hole is drilled out through the second port, and the central axis of the first through hole is parallel to the central axis of the second through hole.

5. The plunger pump of claim 9, wherein: the first through hole is drilled after the drill bit enters the first water outlet cavity through the first port, the second through hole is drilled after the drill bit enters the second water outlet cavity through the second port or the second through hole is drilled after the drill bit enters the third water outlet cavity through the third port.

6. The plunger pump of claim 2, wherein: the first through hole comprises a first communication port and a second communication port which are positioned at two opposite ends of the first through hole, the first communication port is positioned between the second communication port and the first water outlet cavity, the second communication port is exposed to the first port through the first communication port, the first communication port and the second communication port are completely staggered with the first port in a third direction, the first communication port and the second communication port are partially overlapped or completely staggered in the third direction, and the third direction is perpendicular to the central axis of the first water outlet cavity and is parallel to the plane where the central axis of the first water outlet cavity and the central axis of the second water outlet cavity are positioned; the second through hole comprises a third communication port and a fourth communication port which are positioned at two opposite ends of the second through hole, the third communication port is positioned between the fourth communication port and the second water outlet cavity, and the fourth communication port is exposed to the second port through the third communication port or the third communication port is exposed to the third port through the fourth communication port.

7. The plunger pump of claim 2, wherein: the first end opening and the first communicating hole are located on two opposite sides of the first water outlet cavity, the second end opening and the second communicating hole are located on two opposite sides of the second water outlet cavity, the third end opening and the third communicating hole are located on two opposite sides of the third water outlet cavity, and the first end opening, the second end opening and the third end opening are aligned.

8. The plunger pump of claim 2, wherein: the pump body is provided with a first plunger through hole for the first plunger to pass through, a second plunger through hole for the second plunger to pass through, a third plunger through hole for the third plunger to pass through, and a second partial stop valve hole for the second plunger to pass through, the first water outlet cavity sequentially passes through the first through hole and the second water outlet cavity and is communicated with the first partial stop valve hole for the stop valve to pass through, and the third water outlet cavity sequentially passes through the second through hole, The second water outlet cavity is communicated with the first part stop valve hole.

9. The plunger pump of claim 2, wherein: the water outlet device also comprises a first one-way valve, a second one-way valve, a third one-way valve, a first plug for plugging the first port, a second plug for plugging the second port and a third plug for plugging the third port, wherein the first one-way valve is arranged in the first water outlet cavity from the first port, the second one-way valve is arranged in the second water outlet cavity from the second port, and the third one-way valve is arranged in the third water outlet cavity from the third port.

10. A cleaning machine is characterized in that: comprising a plunger pump according to any one of claims 1 to 9.