WO2020007175A1

WO2020007175A1 - Single-plunger high-pressure spraying pump

Info

Publication number: WO2020007175A1
Application number: PCT/CN2019/090984
Authority: WO
Inventors: 林江; 周海杰
Original assignee: 宁波亿林节水科技股份有限公司
Priority date: 2018-07-03
Filing date: 2019-06-12
Publication date: 2020-01-09
Also published as: CN208441983U

Abstract

Disclosed is a single-plunger high-pressure spraying pump, comprising a valve body (10) and a water inlet connector (60), and an electric motor (70), wherein the valve body (10) comprises a valve cavity (11); an upper portion of the valve cavity (11) is provided with a water inlet channel (111), and the upper portion at the right side thereof is provided with a water outlet channel (112); the water inlet channel (111) is provided with a one-way water inlet valve (20), and the water outlet channel (112) is provided with a one-way water outlet valve (30); an upper end of the water inlet channel (111) is connected to the water inlet connector (60); a piston (40) capable of vertically moving is provided inside the valve cavity (11); a lower portion of the piston (40) is connected to a piston rod (41), and the piston rod (41) penetrates, in a sealing-fit manner, from the valve body to the exterior below the valve body (10); and an eccentric sleeve (71) is provided on a power output shaft of the electric motor (70), and the eccentric sleeve (71) is connected to a lower end portion of the piston rod (41). The spraying pump is provided with a small volume and a simple structure.

Description

Single plunger high pressure spray pump

Technical field

The invention relates to the technical field of pumps, in particular to a single-plunger high-pressure spray pump.

Background technique

It is generally hot and humid outdoors in summer. Due to the openness of the environment, air conditioning equipment is not suitable. A high-pressure spray device can be installed outdoors. After adding water to high pressure, spray water mist into the air through a fine nozzle, and use the natural evaporation of the water mist to achieve a cooling effect. The implementation of this cooling method requires a high-pressure plunger pump. Therefore, the development of a small power, compact size, small flow, high conversion efficiency plunger pump is the core component to solve the above problems. Most of the existing plunger pumps on the market are made of metal finishing and contain components such as lubricating oil cylinders. They have the disadvantages of complex structure, high cost, and high maintenance requirements, which hinder the promotion and use of high-pressure spray devices to the majority of household users.

Summary of the invention

The object of the present invention is to provide a single-plunger high-pressure spray pump, which has the characteristics of small size and simple structure.

The technical scheme adopted by the present invention is: a single-plunger high-pressure spray pump, which includes a valve body, a water inlet joint, and a motor. The valve body includes a valve cavity. A water outlet channel, the water inlet channel is provided with a one-way water inlet valve, the water outlet channel is provided with a one-way water outlet valve, the upper end of the water inlet channel is connected to the water inlet joint, and at the same time, a piston capable of moving up and down is arranged in the valve cavity A piston rod is connected to the lower part of the piston, and the piston rod is tightly fitted to the outside of the valve body, and an eccentric sleeve is provided on the power output shaft of the motor, and the eccentric sleeve is connected to the lower end of the piston rod. .

A bearing is sleeved on the eccentric sleeve, and a groove is provided on a side surface of a lower end portion of the piston rod, and an outer ring of the bearing is caught in the groove.

The one-way water inlet valve includes a water inlet valve stem whose lower end is located in the valve cavity and whose upper end is located in the water inlet channel. The large head is bowl-shaped and matched with the opening of the lower end of the water inlet channel, and is fixed to the water inlet. A fixed sleeve at the upper end of the valve stem, and a first return spring supported at both ends between the fixed sleeve and the lower portion of the water inlet channel, respectively.

The one-way water outlet valve includes a water-retaining bowl having a U-shaped longitudinal section and located at an opening at the left end of the water outlet channel, so that the water-retaining bowl has a second return spring that has a tendency to move to the left.

A water outlet connector is disposed in the water outlet channel to the right of the second return spring.

A pressure relief channel is provided on a side wall of the left end opening of the water outlet channel, the pressure relief channel is provided with a pressure relief valve, and an upper end opening of the pressure relief channel communicates with an upper end of the water inlet channel.

The pressure relief valve includes a sealing ball matched with a lower end opening of the pressure relief channel, so that the sealing ball has a third return spring with a downward movement tendency.

The valve body is prepared by integrally molding a plastic that becomes soft after heating.

The piston rod is provided with an oil seal and / or a water seal matching the valve cavity.

A sealing sleeve body is fixed on the housing of the motor, the sealing sleeve body is connected to the valve body through a "U" pin, and the oil seal and / or the water seal is located in the sealing sleeve body.

Compared with the prior art, the invention has the advantages of small size and simple structure. The single-plunger high-pressure spray pump of the present invention uses a crank-link mechanism to drive the piston to reciprocate, continuously replenishes water into the valve cavity, and then pressurizes and sprays out through a water outlet channel, and the piston is single, so the structure is relatively simple. At the same time, there is no need to use common oil cylinders and other components, which greatly reduces the volume of the spray pump and the cost of preparation.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is further described below with reference to the drawings and embodiments:

FIG. 1 is a front sectional view of an embodiment of the present invention.

In the picture:

10, valve body, 11, valve cavity, 111, water inlet channel, 1111, step, 112, water outlet channel, 12, pressure relief channel;

20, one-way water inlet valve, 21, water inlet valve stem, 22, big head, 23, fixed sleeve, 24, first return spring;

30. One-way water outlet valve, 31, water retaining bowl, 32, second return spring, 33, water outlet;

40, piston, 41, piston rod, 411, card slot, 412, oil seal, 413, water seal;

50, pressure relief valve, 51, sealing ball, 511, sealing ball seat, 52, third return spring;

60. Water inlet joint;

70, motor, 71, eccentric sleeve, 72, bearing;

80. Sealing sleeve body;

90. "U" pin.

detailed description

The embodiment is shown in FIG. 1: a single-plunger high-pressure spray pump includes a valve body 10, a water inlet joint 60, and a motor 70. The water inlet 60 communicates with a water source.

Further speaking:

The valve body 10 includes a valve cavity 11. In this embodiment, the valve cavity 11 extends in the up-down direction and is preferably cylindrical. The valve chamber 11 is provided with a water inlet passage 111 at an upper portion and a water outlet passage 112 at an upper portion on the right side. The water inlet channel 111 is provided with a one-way water inlet valve 20, and the water outlet channel 112 is provided with a one-way water outlet valve 30. The upper end of the water inlet passage 111 is connected to the water inlet joint 60. At the same time, a piston 40 capable of moving up and down is provided in the valve cavity 11. A piston rod 41 is connected to the lower portion of the piston 40, and the piston rod 41 is tightly fitted to the outside of the valve body 10. And, an eccentric sleeve 71 is provided on the power output shaft of the motor 70, and the eccentric sleeve 71 is connected to the lower end portion of the piston rod 41. That is, after the motor 70 works, the eccentric sleeve 71 rotates, which drives the piston rod 41 to move up and down, and the piston 40 moves up and down in the valve cavity 11. When the piston 40 moves downward, the one-way water inlet valve 20 is opened and the one-way water outlet valve 30 is closed, and water in the water inlet joint 60 is drawn into the valve cavity 11; when the piston 40 moves upwards At this time, the one-way water inlet valve 20 is closed and the one-way water outlet valve 30 is opened. After the water in the valve cavity 11 is pressurized by the piston 40, it is ejected from the water outlet passage 112. In this way, the complicated parts of the hydraulic oil cylinder are avoided, and the single-piston structure is used, which greatly reduces the complexity of the spray pump, and also reduces the volume and cost of the product.

optimized:

A bearing 72 is sleeved on the eccentric sleeve 71. A locking groove 411 is formed on a side surface of a lower end portion of the piston rod 41, and an outer ring of the bearing 72 is caught in the locking groove 411. In this way, the friction between the eccentric sleeve 71 and the piston rod 41 is made smaller, which is more beneficial to the movement of the piston 40.

The one-way water inlet valve 20 includes: a water inlet valve stem 21 whose lower end is located in the valve cavity 11 and whose upper end is located in the water inlet channel 111. The large head 22 is bowl-shaped and matches the lower end of the water inlet channel 111. A fixing sleeve 23 fixed to the upper end of the water inlet valve rod 21, and first return springs 24 supported at both ends between the fixing sleeve 23 and the lower portion of the water inlet passage 111, respectively. Wherein, in order to cooperate with the large head 22, the diameter of the lower end opening of the water inlet channel 111 must be smaller than the diameter of the water inlet channel 111. That is, the lower end opening of the water inlet channel 111 adopts a beam opening design, and the large head 22 is located below the lower end opening of the water inlet channel 111. The diameter of the large head 22 is larger than the diameter of the water inlet valve stem 21. That is, the diameter of the large head 22 is larger than the diameter of the lower end opening of the water inlet channel 111, and the diameter of the water inlet valve stem 21 is the same as the diameter of the lower end opening of the water inlet channel 111. Since the lower end opening of the water inlet channel 111 adopts a beam opening design, the lower end of the first return spring 24 can be supported on the upper edge of the lower end opening of the water inlet channel 111. The first return spring 24 causes the water inlet valve lever 21 to move upward. In this way, in normal times, the large head 22 seals the lower end opening of the water inlet channel 111; only when the piston 40 moves downward, the large head 22 moves downward against the pressure of the first return spring 24, and the water inlet channel 111 The lower opening is open.

The one-way water outlet valve 30 includes a water blocking bowl 31 having a U-shaped longitudinal section and located at the left end opening of the water outlet passage 112, so that the water blocking bowl 31 has a second return spring 32 that moves to the left. Similarly, the opening at the left end of the water outlet channel 112 is also designed with a beam opening. Thus, in normal times, the second return spring 32 forces the water retaining bowl 31 to seal the left end opening of the water outlet channel 112; only after the piston 40 moves upward, the water with pressure causes the water retaining bowl 31 to overcome the second reset. The pressure of the spring 32 moves to the right, and the left end opening of the water outlet channel 112 is opened.

A water outlet connector 33 is disposed in the water outlet channel 112 to the right of the second return spring 32. The water outlet joint 33 can prevent the water blocking bowl 31 from coming out of the water outlet passage 112 and can also provide support for the right end of the second return spring 32.

A pressure relief channel 12 is provided on a side wall opened at the left end of the water outlet channel 112. The pressure relief channel 12 is provided with a pressure relief valve 50, and an upper end of the pressure relief channel 12 is opened to communicate with an upper end of the water inlet channel 111.

The pressure relief valve 50 includes a sealing ball 51 that is matched with the lower end opening of the pressure relief channel 12, and the sealing ball 51 has a third return spring 52 that has a downward movement tendency. Similarly, the lower end opening of the pressure relief channel 12 adopts a beam opening design. At the same time, a horizontal step 1111 can be provided on the side of the water inlet channel 111, the upper end of the third return spring 52 can be supported on the step 1111, and the lower end of the third return spring 52 can be supported on a sealed ball seat. 511, and the sealing ball 51 can be fixed on the lower part of the sealing ball seat 511. In this way, when the pressure in the valve cavity 11 is too large, the sealing ball 51 can be moved upward to communicate the left end opening of the water outlet passage 112 with the upper end of the water inlet passage 111, and quickly reduce the pressure in the valve cavity 11. .

Continue to optimize:

The valve body 10 is prepared by integrally molding a plastic that becomes soft after heating. In this way, the difficulty of preparation is further reduced.

The piston rod 41 is provided with an oil seal 412 and / or a water seal 413 corresponding to the valve cavity 11. In this way, the sealing between the piston rod 41 and the lower portion of the valve chamber 11 is achieved in a relatively simple manner.

A sealing body 80 is fixed on the casing of the motor 70. The seal sleeve body 80 is connected to the valve body 10 through a “U” pin 90, and the oil seal 412 and / or the water seal 413 is located in the seal sleeve body 80. In this way, since the "U" pin 90 is easy to disassemble and assemble, the difficulty of product maintenance is reduced.

The above is only a preferred embodiment of the present invention, and thus does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly used in other related The technical field is included in the patent protection scope of the present invention.

Claims

The single-plunger high-pressure spray pump includes a valve body (10), a water inlet joint (60), and a motor (70). The valve body (10) includes a valve cavity (11), and the valve cavity (11) The upper part is provided with a water inlet channel (111), and the upper right side is provided with a water outlet channel (112). The water inlet channel (111) is provided with a one-way water inlet valve (20), and the water outlet channel (112) is provided with a one-way A water outlet valve (30), an upper end of the water inlet passage (111) is connected to the water inlet joint (60), and a piston (40) capable of moving up and down is provided in the valve cavity (11). A piston rod (41) is connected to the lower part, and the piston rod (41) is tightly fitted to the outside of the valve body (10), and an eccentric sleeve (71) is provided on the power output shaft of the motor (70). The eccentric sleeve (71) is connected to the lower end portion of the piston rod (41).
The single-plunger high-pressure spray pump according to claim 1, characterized in that: a bearing (72) is sleeved on the eccentric sleeve (71), and a groove is provided on a side surface of a lower end portion of the piston rod (41) (411), the outer ring of the bearing (72) is caught in the slot (411).
The single-plunger high-pressure spray pump according to claim 1, wherein the one-way water inlet valve (20) comprises: a lower end located in the valve cavity (11) and an upper end located in the water inlet passage (111) A water inlet valve stem (21), a bowl-shaped large head (22) matching the lower end opening of the water inlet passage (111), a fixing sleeve (23) fixed to the upper end of the water inlet valve stem (21), and The two ends are respectively supported by a first return spring (24) between the fixing sleeve (23) and a lower portion of the water inlet channel (111).
The single-plunger high-pressure spray pump according to claim 1, characterized in that: the one-way water outlet valve (30) comprises: a block having a U-shaped longitudinal section and located at the left end opening of the water outlet passage (112) The water bowl (31) has a second return spring (32) for the water retaining bowl (31) to move to the left.
The single-plunger high-pressure spray pump according to claim 4, wherein a water outlet connector (33) is provided in the water outlet channel (112) to the right of the second return spring (32).
The single-plunger high-pressure spray pump according to claim 4, characterized in that: a pressure relief channel (12) is provided on a side wall of the left end opening of the water outlet channel (112), and the pressure relief channel (12) is provided with A pressure relief valve (50), and an upper end of the pressure relief channel (12) is opened to communicate with an upper end of the water inlet channel (111).
The single-plunger high-pressure spray pump according to claim 6, characterized in that the pressure relief valve (50) comprises: a sealing ball (51) matched with a lower end opening of the pressure relief channel (12), so that the pressure relief valve (50) The sealing ball (51) has a third return spring (52) which has a tendency to move downward.
The single-plunger high-pressure spray pump according to claim 1, characterized in that the valve body (10) is prepared by integrally molding a plastic that becomes soft after heating.
The single-plunger high-pressure spray pump according to claim 1, characterized in that: the piston rod (41) is provided with an oil seal (412) and / or a water seal (413) matching the valve cavity (11).
The single-plunger high-pressure spray pump according to claim 9, characterized in that: a sealing sleeve body (80) is fixed on a casing of the motor (70), and the sealing sleeve body (80) passes through a "U" -shaped pin (90) is connected to the valve body (10), and the oil seal (412) and / or the water seal (413) is located in the sealing sleeve body (80).