CN217270782U - Plunger pump of high-pressure cleaning machine - Google Patents

Abstract

The utility model discloses a high pressure cleaner plunger pump, including cylinder body and casing, water inlet and delivery port have been seted up to the cylinder body front end, the delivery port is in the water inlet top, the cylinder body rear end is connected and transverse arrangement has the plunger chamber with the casing, plunger chamber lower extreme is provided with horizontal water inlet flow way, water inlet flow way and water inlet intercommunication, plunger chamber upper end is provided with horizontal water outlet flow way, water outlet flow way and delivery port intercommunication, install the check valve in the water outlet, the pressure regulating chamber has been seted up on the cylinder body of delivery port top, pressure regulating chamber and delivery port intercommunication, the air-vent valve is installed to the pressure regulating intracavity, pressure regulating chamber downside is provided with the overflow runner with the water inlet intercommunication, the cylinder body rear end is provided with the ejector pin chamber, the ejector pin chamber is in the delivery port rear portion, ejector pin chamber opening is towards the cylinder body circumference outside. This plunger pump, ejector pin chamber position sets up more rationally, has great installation space during parts such as installation ejector pin and micro-gap switch, and the dismouting is comparatively convenient.

Description

Plunger pump of high-pressure cleaning machine

Technical Field

The utility model relates to a plunger pump, in particular to high pressure cleaner plunger pump.

Background

The high-pressure cleaning machine is a device which enables a high-pressure plunger pump to generate high-pressure water through a power device, and the high-pressure water is sprayed out through a spray gun to wash an object. The high-pressure cleaning machine comprises a shell and a cylinder body, wherein a water inlet, a water outlet and a plunger hole are formed in the cylinder body, a piston is arranged in the plunger hole, and a crankshaft and a swing rod which drive a plunger to slide in a reciprocating mode are arranged in the shell. When the high-pressure cleaning machine works, the crankshaft drives the plunger to axially slide in a reciprocating manner, water flowing into the water inlet is firstly sucked into the plunger cavity, and then the water in the plunger cavity is extruded to the water outlet to be sprayed out.

Chinese patent No. 201921175251.8 discloses a high-pressure plunger pump for cleaning machine, has seted up the ejector pin installation cavity on the cylinder body of plunger pump, installs ejector pin, ejector pin spring and ejector pin seat in the ejector pin installation cavity, and micro-gap switch is installed to ejector pin seat outer end, and the ejector pin outer end is just to micro-gap switch's contact. When the cleaning machine is in a power-on state, and the spray gun is switched to a closed state from a water spraying state, water flow of the water outlet is cut off, and water pressure at the water outlet suddenly rises to cause the water pressure at the bottom of the ejector rod mounting cavity to rise, so that the ejector rod moves outwards to push the movable contact, the microswitch changes a switch state, and the motor stops working; when the spray gun is opened again, the water pressure at the water outlet is reduced, the ejector rod is reset, the micro switch changes the switch state again, and the motor works again to pressurize water for cleaning. As shown in the attached figure 5 of the patent, the ejector rod installation cavity faces one side of the shell, the distance between the opening of the ejector rod installation cavity and a bearing seat of the shell is small, and when parts such as an ejector rod and a micro switch are installed, due to the fact that installation space is limited, the installation and the disassembly are difficult.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a high pressure cleaner plunger pump, ejector pin chamber position sets up more rationally, has great installation space during parts such as installation ejector pin and micro-gap switch, and the dismouting is comparatively convenient.

The above technical purpose of the present invention can be achieved by the following technical solutions: a plunger pump of a high-pressure cleaning machine comprises a cylinder body and a shell, wherein the front end of the cylinder body is provided with a water inlet and a water outlet, the water outlet is positioned above the water inlet, the rear end of the cylinder body is connected with the shell and is transversely provided with plunger cavities, the lower end of the plunger cavity is provided with a transverse water inlet flow passage, the water inlet flow passage is communicated with the water inlet, the upper end of the plunger cavity is provided with a transverse water outlet flow passage, the water outlet flow passage is communicated with the water outlet, a check valve is arranged in the water outlet, the water inlet flow passage is communicated with the plunger cavity through a water inlet check valve cavity, the plunger cavity is communicated with the water outlet flow passage through a water outlet check valve cavity, a pressure regulating cavity is arranged on the cylinder body above the water outlet and is communicated with the water outlet, a pressure regulating valve is arranged in the pressure regulating cavity, the lower side of the pressure regulating cavity is provided with an overflow flow passage communicated with the water inlet, the rear end of the cylinder body is provided with a mandril cavity, the mandril cavity is positioned at the rear part of the water outlet, the opening of the mandril cavity faces to the circumferential outer side of the cylinder body, ejector rods, ejector rod springs and ejector rod seats are installed in the ejector rod cavities, micro switches matched with the ejector rods are installed on the outer sides of the ejector rod seats, the bottoms of the ejector rod cavities are communicated with water outlets in the outer ends of the check valves through communicating flow channels, and backflow flow channels communicated with the pressure regulating cavities are arranged in the middle of the ejector rod cavities.

Through above-mentioned technical scheme, the cylinder body is the cylinder body circumference face except that other four faces of preceding terminal surface and rear end face direction, and ejector pin chamber opening is towards the cylinder body circumference outside, means that ejector pin chamber axis is parallel or is close parallel with the bearing frame axis on the casing. The ejector pin chamber sets up like this and makes ejector pin chamber opening can not drive the bearing frame towards the protrusion on the casing, when avoiding installing ejector pin and micro-gap switch, because ejector pin chamber axis is towards the bearing frame lateral surface, makes the distance between convex bearing frame and the ejector pin chamber opening less, and installation space between the two is less, forms the interference between ejector pin and micro-gap switch and the bearing frame lateral surface during the installation, influences ejector pin and micro-gap switch's installation. The ejector pin chamber orientation changes the back, and ejector pin chamber opening no longer faces the bearing frame lateral surface, and ejector pin and micro-gap switch can be followed the cylinder body circumference outside and installed to the ejector pin chamber on, and operating space is bigger, and it is more convenient to install.

Preferably, the axis of the ram cavity is parallel to the axis of the bearing block.

Through above-mentioned technical scheme, when installing ejector pin and other parts to the ejector pin intracavity, ejector pin and other parts can not and bearing frame lateral surface between take place to interfere, installation space is great, and it is comparatively convenient to install. Meanwhile, the ejector rod cavity is arranged in such a way, so that the arrangement of the backflow flow channel and the communication flow channel is simpler.

Preferably, the backflow channel is arranged along the axis of the water outlet, and the projection of the backflow channel on the longitudinal plane is positioned in the water outlet.

Through the technical scheme, when the backflow flow channel is processed, the hole can be directly drilled in the water outlet along the axis direction, the pressure regulating cavity and the ejector rod cavity are drilled through, and the backflow flow channel is formed.

Preferably, the communicating flow passage comprises a first communicating flow passage, a second communicating flow passage and a third communicating flow passage, the first communicating flow passage is obliquely communicated with the water outlet at the outer end of the check valve and the middle part of the pressure regulating cavity, the third communicating flow passage is communicated with the bottom of the ejector rod cavity along the axis direction of the plunger cavity, and the second communicating flow passage is obliquely communicated with the middle part of the pressure regulating cavity and the third communicating flow passage.

Through the technical scheme, the first communication flow channel can communicate the water outlet of the outer end of the check valve with the middle of the pressure regulating cavity, and is communicated with the bottom of the ejector rod cavity through the second communication flow channel and the third communication flow channel, so that the ejector rod can control the motor according to the water pressure at the water outlet of the outer end of the check valve, the motor and the spray gun can work synchronously, the motor works when the spray gun is opened, and the motor stops working when the spray gun is closed.

Preferably, the inner end of the ejector rod seat extends into the ejector rod cavity, and the inner end of the ejector rod is arranged inside the inner end of the ejector rod seat in a sliding mode.

Through the technical scheme, the ejector rod slides in the inner end of the ejector rod seat, the ejector rod cannot rub against the inner wall of the ejector rod cavity on the cylinder body when sliding, the cylinder body can be prevented from being abraded by the ejector rod in the repeated sliding process, and the cylinder body is prevented from being damaged. The cylinder body overall cost is higher, and it is comparatively troublesome to change, and ejector pin seat cost is lower, change comparatively more conveniently relatively, can effectively reduce the maintenance cost of plunger pump.

Preferably, the mounting seat is installed in the ejector rod seat outside, and micro-gap switch installs in the mounting seat, and the mounting seat passes through the bolt to be fixed in ejector rod seat outer end.

Through the technical scheme, the micro switch can be conveniently fixed at the outer end of the ejector rod seat, and the micro switch is convenient to disassemble.

Preferably, the pressure regulating cavity is internally provided with a valve seat, a valve rod, a valve core and a pressure regulating spring, the periphery of the lower end of the valve seat is attached and sealed with the inner wall of the pressure regulating cavity, an annular groove is formed between the outer side surface of the valve seat and the inner wall of the pressure regulating cavity, and the first communicating flow passage and the second communicating flow passage are communicated with the annular groove.

Through the technical scheme, the water flow at the water outlet of the outer end of the check valve can flow more smoothly after the annular groove is arranged, firstly enters the annular groove through the first communication flow channel, then enters the second communication flow channel through the annular groove, and finally enters the ejector rod cavity through the third communication flow channel.

Compared with the prior art, the beneficial effects of the utility model are that: through changing ejector pin chamber opening orientation for can not take place to interfere with on the casing during part installation such as ejector pin between the convex bearing frame, make part installations such as ejector pin more convenient.

Drawings

FIG. 1 is a perspective view of an embodiment;

FIG. 2 is a perspective view of the water inlet and outlet in the embodiment;

FIG. 3 is a perspective view of the front end of the cylinder block in the embodiment;

FIG. 4 is a perspective view of the rear end of the cylinder block in the embodiment;

FIG. 5 is a schematic sectional view of the cylinder body passing through the water outlet axis in the embodiment;

FIG. 6 is a schematic longitudinal sectional view of the cylinder body passing through the axis of the pressure regulating valve chamber in the embodiment;

FIG. 7 is a schematic cross-sectional view of the cylinder body of the embodiment taken through the axis of the ram cavity.

Reference numerals are as follows: 1. a cylinder body; 2. a housing; 3. a water inlet; 4. a water outlet; 5. a plunger cavity; 6. a water inlet flow channel; 7. a water outlet flow channel; 8. a check valve; 9. a water inlet one-way valve cavity; 10. a water outlet one-way valve cavity; 11. a pressure regulating cavity; 12. a pressure regulating valve; 13. an overflow channel; 14. a ram cavity; 15. a top rod; 16. a push rod spring; 17. a jack rod seat; 18. a microswitch; 19. a flow passage is communicated; 20. a return flow channel; 21. a bearing seat; 22. the first flow channel is communicated; 23. a second communication flow channel; 24. a third communicating flow passage; 25. a mounting seat; 26. a bolt; 27. a valve seat; 28. a valve stem; 29. a valve core; 30. a pressure regulating spring; 31. an annular groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

As shown in figures 1-7, a high pressure cleaner plunger pump, includes cylinder body 1 and casing 2, and 1 rear end of cylinder body is connected with casing 2, and water inlet 3 and delivery port 4 have been seted up to 1 front end of cylinder body, and water inlet 3 and delivery port 4 all are in 1 front end left side of cylinder body, and delivery port 4 is in water inlet 3 tops. The lower part of the front end of the cylinder body 1 is transversely provided with a water inlet flow passage 6, and the inlet water flow passage 6 is communicated with the water inlet 3. The upper part of the front end of the cylinder body 1 is transversely provided with a water outlet flow passage 7, and the water outlet flow passage 7 is communicated with the water outlet 4. The rear end of the cylinder body 1 is provided with a plunger cavity 5, and the plunger cavity 5 is transversely arranged in the middle of the rear end of the cylinder body 1. The lower part of the front end of the cylinder body 1 is also provided with a water inlet one-way valve cavity 9, the water inlet one-way valve cavity 9 is vertically communicated with the water inlet runner 6, and the communicating hole is positioned at the bottom of the water inlet one-way valve cavity 9. The upper part of the cylinder body 1 is provided with a water outlet one-way valve cavity 10, the bottom of the water outlet one-way valve cavity 10 is communicated with the plunger cavity 5, and the side surface of the water outlet one-way valve cavity 10 is communicated with the water outlet flow passage 7. A plunger and a crankshaft are arranged in the shell 2, and the crankshaft drives the plunger to slide in the plunger cavity 5 in a reciprocating mode, so that water is pressurized and pumped out. The housing 2 has a bearing seat 21 projecting outwardly from a side surface thereof, and a crankshaft end is mounted in the bearing seat 21 through a bearing.

Install check valve 8 in the delivery port 4, pressure regulating chamber 11 has been seted up to perpendicular delivery port 4 axis above the delivery port 4, install air-vent valve 12 in the pressure regulating chamber 11, ejector pin chamber 14 has been seted up to perpendicular delivery port 4 axis and pressure regulating chamber 11 axis on the valve body of delivery port 4 rear side, ejector pin chamber 14 is towards the cylinder body 1 circumference outside to be parallel with the axis direction of bearing frame 21, make ejector pin chamber 14 opening can not face the bearing frame 21 on the casing 2, make to have great installation space when installing the part in ejector pin chamber 14. A mandril seat 17, a mandril 15 and a mandril spring 16 are arranged in the mandril cavity 14, a microswitch 18 matched with the mandril 15 is arranged at the outer side of the mandril seat 17, and the bottom of the mandril cavity 14 is communicated with the water outlet 4 at the outer end of the check valve 8 through a communicating flow passage 19. The middle part of the ejector rod cavity 14 is provided with a return flow passage 20 communicated with the pressure regulating cavity 11. When the outside water supply of plunger pump work, if when the spray gun of being connected with delivery port 4 is closed, water pressure in the water route between delivery port 4 and the spray gun can rise suddenly, water pressure after the rising can make check valve 8 close, check valve 8 cuts off delivery port and play water runner 7, water in the play water runner 7 is no longer to delivery port 4 flow, water pressure after the rising simultaneously can be used 15 ends of ejector pin through intercommunication runner 19, make ejector pin 15 remove to ejector pin seat 17 outer end direction, the contact of micro-gap switch 18 is moved in the top, change micro-gap switch 18's on-off state, make the motor stop work. When the spray gun is opened again, the water pressure in the pipeline between the spray gun and the water outlet 4 is reduced, the ejector rod 15 is reset under the action of the ejector rod spring 16 and is separated from the contact with the microswitch 18, and the motor works again to drive the plunger pump to supply water outwards. The arrangement of the backflow channel 20 enables water in the middle of the plunger cavity 5 to be discharged into the water outlet channel 7 or absorb water from the water outlet channel 7, so that the water pressure in the middle of the ejector rod cavity 14 is consistent with the water pressure in the water outlet channel 7, and the phenomenon of pressure build-up is avoided, and the sliding of the ejector rod 15 is prevented from being influenced. The axis of the backflow flow channel 20 coincides with the axis of the water outlet 4, and when the backflow flow channel 20 is arranged, only holes need to be drilled from the inside of the water outlet 4 to the direction of the ejector rod cavity 14, the backflow flow channel and the ejector rod cavity are communicated, and the backflow flow channel is convenient to process.

The communication flow passage 19 includes a first communication flow passage 22, a second communication flow passage 23, and a third communication flow passage 24. The first communication flow passage 22, the axis of the water outlet 4 and the axis of the pressure regulating cavity 11 are positioned on the same plane, and the first communication flow passage 22 is obliquely communicated with the water outlet 4 at the outer end of the check valve 8 and the middle part of the pressure regulating cavity 11. And the third communicating flow channel 24 is positioned on the right side of the water outlet 4 and is communicated with the bottom of the ejector rod cavity 14 along the axis direction of the water outlet 4, and the outer end of the third communicating flow channel 24 is blocked by a plug. The axis of the second communication flow passage 23, the axis of the pressure regulating cavity 11 and the axis of the water outlet one-way valve cavity 10 are positioned on the same plane, and the second communication flow passage 23 is obliquely communicated with the middle part of the pressure regulating cavity 11 and the third communication flow passage 24. The bottom of the ejector rod cavity 14 can be communicated with the water outlet 4 at the outer end of the check valve 8 through the first communication flow passage 22, the second communication flow passage 23 and the third communication flow passage 24, so that the water pressure of the water outlet 4 at the outer end of the check valve 8 can act on the bottom of the ejector rod 15.

The inner end of the ejector rod seat 17 extends into the ejector rod cavity 14, and the inner end of the ejector rod 15 is arranged inside the inner end of the ejector rod seat 17 in a sliding mode, so that the inner end of the ejector rod 15 is prevented from contacting with the inner end of the ejector rod seat 17 when sliding and not contacting with the inner wall of the ejector rod cavity 14, and abrasion of the inner wall of the ejector rod cavity 14 caused by reciprocating sliding of the ejector rod 15 is avoided. Ejector pin 15 and ejector pin seat 17 need not whole cylinder body 1 to replace like this when cooperating later stage ejector pin 15 or ejector pin seat 17 and taking place wearing and tearing, and the maintenance cost is lower, and it is more convenient to operate.

The mount pad 25 is installed in the ejector pin seat 17 outside, and micro-gap switch 18 is installed in mount pad 25, and mount pad 25 passes through bolt 26 to be fixed in ejector pin seat 17 outer end, is provided with the bolt groove on the ejector pin seat 17 outer peripheral face, is provided with the bolt hole that supplies bolt 26 to pass on the mount pad 25, and the bolt is inserted and is established in bolt hole and bolt inslot to realize fixing between the two.

The pressure regulating chamber 11 is provided with a valve seat 27, a valve rod 28, a valve core 29 and a pressure regulating spring 30. The bottom of the pressure regulating cavity 11 is communicated with the water inlet 3 through an overflow flow passage 13. The valve seat 27 is fixed in the pressure regulating cavity 11 through threads, the valve rod 28 is arranged in the valve seat 27 in a sliding mode, the valve core 29 is installed at the lower end of the valve rod 28 and tightly pressed at the upper end of the overflow flow channel 13, the upper end of the valve rod 28 is abutted against the pressure regulating spring 30, and the water outlet pressure can be regulated by changing the compression amount of the pressure regulating spring 30. When the water pressure in the water outlet flow passage 7 is higher than the water pressure set by the pressure regulating valve 12, the valve core 29 moves upward under the action of the water pressure and is separated from the upper end of the overflow flow passage to be collided, and the water flow in the water outlet flow passage 7 returns to the water inlet 3 through the overflow flow passage 13.

The outer peripheral surface of the lower end of the valve seat 27 is attached and sealed with the inner wall of the pressure regulating cavity 11, an annular groove 31 is formed between the outer side surface of the valve seat 27 above the attaching position and the inner wall of the pressure regulating cavity 11, and the upper ends of the first communicating flow channel 22 and the second communicating flow channel 23 are communicated with the annular groove 31, so that water flow in the communicating flow channel 19 is smoother.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.

Claims (7)

1. A plunger pump of a high-pressure cleaning machine comprises a cylinder body (1) and a shell (2), wherein the front end of the cylinder body (1) is provided with a water inlet (3) and a water outlet (4), the water outlet (4) is positioned above the water inlet (3), the rear end of the cylinder body (1) is connected with the shell (2) and is transversely provided with plunger cavities (5), the lower end of each plunger cavity (5) is provided with a transverse water inlet runner (6), the water inlet runners (6) are communicated with the water inlet (3), the upper end of each plunger cavity (5) is provided with a transverse water outlet runner (7), the water outlet runners (7) are communicated with the water outlet (4), a check valve (8) is arranged in each water outlet (4), the water inlet runners (6) are communicated with the plunger cavities (5) through water inlet one-way valve cavities (9), the plunger cavities (5) are communicated with the water outlet runners (7) through water outlet one-way valve cavities (10), a pressure regulating cavity (11) is arranged on the cylinder body (1) above the water outlet (4), pressure regulating chamber (11) and delivery port (4) intercommunication, install air-vent valve (12) in pressure regulating chamber (11), pressure regulating chamber (11) downside is provided with overflow runner (13) with water inlet (3) intercommunication, and cylinder body (1) rear end is provided with ejector pin chamber (14), characterized by: ejector pin chamber (14) are in delivery port (4) rear portion, ejector pin chamber (14) opening is towards the cylinder body (1) circumference outside, install ejector pin (15), ejector pin spring (16) and ejector pin seat (17) in ejector pin chamber (14), ejector pin seat (17) outside install with ejector pin (15) complex micro-gap switch (18), delivery port (4) intercommunication in ejector pin chamber (14) bottom through intercommunication runner (19) and check valve (8) outer end, ejector pin chamber (14) middle part is provided with backflow runner (20) with pressure regulating cavity (11) intercommunication.

2. The high pressure cleaner plunger pump of claim 1, wherein: the axis of the ejector rod cavity (14) is parallel to the axis of the bearing seat (21).

3. The high pressure cleaner plunger pump of claim 1, wherein: the backflow flow channel (20) is arranged along the axis of the water outlet (4), and the projection of the backflow flow channel (20) on the longitudinal plane is positioned in the water outlet (4).

4. The high pressure cleaner plunger pump of claim 1, wherein: the communicating flow channel (19) comprises a communicating flow channel I (22), a communicating flow channel II (23) and a communicating flow channel III (24), the communicating flow channel I (22) is obliquely communicated with the middle part of the pressure regulating cavity (11) and the water outlet (4) at the outer end of the check valve (8), the communicating flow channel III (24) is communicated with the bottom of the ejector rod cavity (14) along the axis direction of the plunger cavity (5), and the communicating flow channel II (23) is obliquely communicated with the middle part of the pressure regulating cavity (11) and the communicating flow channel III (24).

5. The high pressure cleaner plunger pump of claim 1, wherein: the inner end of the ejector rod seat (17) extends into the ejector rod cavity (14), and the inner end of the ejector rod (15) is arranged inside the inner end of the ejector rod seat (17) in a sliding mode.

6. The high pressure cleaner plunger pump of claim 1, wherein: the outer side of the ejector rod seat (17) is provided with a mounting seat (25), the microswitch (18) is arranged in the mounting seat (25), and the mounting seat (25) is fixed at the outer end of the ejector rod seat (17) through a bolt (26).

7. The high pressure cleaner plunger pump of claim 4, wherein: install disk seat (27), valve rod (28), case (29) and pressure regulating spring (30) in pressure regulating chamber (11), disk seat (27) lower extreme periphery and pressure regulating chamber (11) inner wall laminating are sealed, form ring channel (31) between disk seat (27) lateral surface and pressure regulating chamber (11) inner wall, and intercommunication runner one (22) and intercommunication runner two (23) all communicate with ring channel (31).

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