WO2016112763A1

WO2016112763A1 - Water-lubricated high-pressure plunger pump and handheld high-pressure jet apparatus

Info

Publication number: WO2016112763A1
Application number: PCT/CN2015/097282
Authority: WO
Inventors: 蒋祖光
Original assignee: 沃尔科技有限公司
Priority date: 2015-01-15
Filing date: 2015-12-14
Publication date: 2016-07-21

Abstract

Disclosed are a water-lubricated high-pressure plunger pump and a handheld high-pressure jet apparatus. The high-pressure plunger pump comprises a shell (10) provided with through-holes. A cylinder block (20) is provided in the through-hole and provide with cylinder bores (21) in a circumferential array. A water inlet end cover (30) is provided at one end of the through-hole and a water outlet end cover (40) is provided at the other end of the through-hole. A return stroke plate (50) is provided between the cylinder block and the water inlet end cover (30) and a port plate (60) is provided between the cylinder block and the water outlet end cover (40). The water inlet end cover (30) is provided with a water inlet channel (31) communicated with the external and the water inlet channel (31) is communicated with a water inlet (61) in the port plate. The water outlet end cover (40) is provided with a water outlet channel (41) communicated with the external and the water outlet channel (41) is communicated with a water outlet (62) in the port plate. The high-pressure plunger pump is mainly applied to small hydraulic device, especially a handheld high-pressure jet apparatus, and solves the problem of inconvenience in water channel design.

Description

Water-lubricated high-pressure piston pump and hand-held high-pressure injection device

This application is required to be submitted to the China Patent Office on January 15, 2015, the application number is 201520051004.2, the utility model name is “water-lubricated high-pressure piston pump and hand-held high-pressure injection device”, and submitted to China on January 15, 2015. The Patent Office, Application No. 201510036847.X, the entire disclosure of which is hereby incorporated by reference in its entirety in its entirety in its entirety in the the the the the the the the the the

Technical field

The invention relates to the field of hydraulic technology, in particular to a water-lubricated high-pressure piston pump and a hand-held high-pressure injection device.

Background technique

The high-pressure plunger pump performs reciprocating piston movement in the cylinder bore of the cylinder through its plunger to realize liquid suction and boost pumping, and the cylinder of the high-pressure piston pump is generally installed inside the casing, and the casing mainly includes the casing. And end caps at both ends of the housing. The water inlet and the water outlet of the existing high-pressure plunger pump are generally disposed at the same end cover, and the water inlet and the water outlet can directly correspond to the cylinder hole of the cylinder.

In the process of realizing and using the existing high-pressure piston pump, the inventors have found that at least the following problems exist in the prior art: since the water inlet and the water outlet are designed on the same end cover, the design of the water flow channel is difficult, especially When the high-pressure plunger pump needs to be miniaturized, the water flow channel is more difficult to design; in addition, if the miniaturized high-pressure piston pump is applied to the hand-held high-pressure injection device, such as a hand-held high-pressure fire extinguishing device, a hand-held high voltage Flushing equipment, etc., because the water outlet of the hand-held high-pressure injection device needs to be designed at the front end, and at this time, the water inlet is also designed at the front end, which inevitably leads to inconvenient carrying and inconvenient installation of the product.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a water-lubricated high-pressure plunger pump and a hand-held high-pressure injection device, which can better perform water. Flow channel design.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

A water-lubricated high-pressure piston pump includes a housing having a through hole, wherein the through hole is provided with a cylinder body, and the cylinder body is provided with a cylinder hole according to a circumferential array, and one end of the through hole is provided with a water outlet cover, the other end is provided with a water outlet end cover, a returning disc is arranged between the cylinder body and the water inlet end cover, and a distribution plate is arranged between the cylinder body and the water outlet end cover; The water inlet cover is provided with a water inlet passage communicating with the outside, the water inlet passage is in communication with the water inlet hole on the distribution plate; and the water outlet end cover is provided with a water outlet passage communicating with the outside. The water outlet channel is in communication with a water outlet hole on the distribution plate.

Further, a side gap is formed between the cylinder and the casing, and the water inlet passage communicates with the water inlet hole on the distribution plate through the side gap.

Further, the water outlet end cover is further provided with a water guiding passage, one end of the water guiding passage communicates with the water inlet hole on the distribution plate, and the other end passes through the side between the cylinder body and the casing A gap is in communication with the water inlet passage.

Preferably, the water inlet of the water inlet passage is disposed at a cylindrical side of the water inlet end cover.

Further, a communication hole is disposed on the cylinder body in the axial direction, and the water inlet passage is further communicated with the water inlet hole of the distribution plate through the communication hole.

Preferably, the communication hole is spaced apart from the cylinder bore in a circumferential direction.

Preferably, the bore of the cylinder bore is larger than the bore of the communication bore.

Preferably, the diameter of the communication hole is 0.5 to 0.8 times the aperture of the cylinder hole.

Further, the return disk is provided with a plunger shoe assembly inserted into the cylinder bore.

Further, the inner end surface of the water inlet end cover is a sloped surface, and the plunger shoe assembly is attached to the inclined surface to move.

Preferably, the water-lubricated high-pressure piston pump is a small high-pressure plunger pump, the water inlet end cap is a high-pressure piston pump installation end, and the water outlet end cover is a high-pressure plunger pump pump water end.

Further, the water inlet end cover is provided with a first shaft hole through which the drive shaft passes, the first shaft hole is provided with a first bearing, and the water inlet passage is worn from the outer end of the first bearing To the inner end of the first bearing.

Further, the water outlet end cover is provided with a second shaft hole for mounting a drive shaft, and the second shaft hole is provided with a second bearing, and the water guiding passage passes from the inner end of the second bearing to the first The outer end of the two bearings.

A hand-held high-pressure injection device comprising a base and a hand-held portion, wherein the base is provided with a motor, and further comprises a water-lubricated high-pressure plunger pump according to the above technical solution, the water-lubricated high-pressure plunger pump The inlet cover is assembled with the base.

The water-lubricated high-pressure plunger pump provided by the invention has a water inlet end cover and a water outlet end cover respectively disposed at two ends of the through hole on the casing, and a returning plate, a cylinder body and a water outlet are arranged between the cylinder body and the water inlet end cover A flow distribution plate is arranged between the end caps; a water inlet passage is arranged on the water inlet end cover, and a water outlet channel is arranged on the water outlet end cover, the water inlet channel is connected with the water inlet hole of the distribution plate, and the water outlet channel and the water outlet hole of the distribution plate Connected. Therefore, the influent water can be sucked through the cylinder bore of the cylinder, and the effect of the water-lubricated high-pressure plunger pump on the water inlet pressure is achieved. In the water-lubricated high-pressure plunger pump provided by the present invention, since the water inlet passage and the water outlet passage are respectively designed on the inlet end cover and the outlet end cover, water flow can be respectively performed on the inlet end cover and the outlet end cover. The channel design increases the design space of the water flow channel, so that the water flow channel design can be better.

Further, in the water-lubricated high-pressure piston pump provided by the present invention, the water in the water inlet passage passes through the cylinder and reaches the water inlet hole, so that the water entering the water inlet hole can cool the cylinder. After the high-pressure piston pump is miniaturized, the overall heat dissipation area is small due to its small size, and it is easy to overheat during high-speed operation. After the solution provided by the present invention, the cylinder can be cooled well. Therefore, it functions to protect the high pressure plunger pump.

Furthermore, when the water-lubricated high-pressure piston pump provided by the present invention is mounted on the hand-held high-pressure injection device, the water inlet end cap of the water-lubricated high-pressure piston pump is connected with the machine base, thereby making the water inlet end The water inlet of the cover can be located at the rear end of the hand-held high pressure injection device, thereby facilitating the carrying and installation of the hand held high pressure injection device.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in the drawings Other drawings may also be obtained from these drawings without the use of creative labor.

Figure 1 is a cross-sectional view of a high pressure piston pump in accordance with an embodiment of the present invention;

Figure 2 is a partial enlarged view of part I of Figure 1;

Figure 3 is a partial enlarged view of a portion II of Figure 1;

Figure 4 is a partial enlarged view of a portion III of Figure 1;

Figure 5 is a cross-sectional view of a cylinder block in accordance with an embodiment of the present invention;

Figure 6 is a right side view of Figure 5;

Figure 7 is a cross-sectional view of the first bearing in the embodiment of the present invention;

Figure 8 is a right side view of Figure 7;

Figure 9 is a front elevational view of the high pressure injection device in accordance with an embodiment of the present invention;

Figure 10 is a cross-sectional view taken along line A-A of Figure 9;

Reference mark:

10-shell, 20-cylinder, 21-cylinder bore, 22-side clearance, 23-communication bore, 30-inlet end cap, 31-inlet passage, 32-first shaft bore, 33-first Bearing, 34-inner end face, 35-bearing face, 36-through groove, 40-outlet end cover, 41-outlet passage, 42-water passage, 43-second shaft hole, 44-second bearing, 45-waterproof Ream, 50-return plate, 51-plunger shoe assembly, 60-distribution plate, 61-inlet hole, 62-outlet hole, 63-end gap, 64-inlet clearance, 70-stop plate, 80- Mechanical seal assembly, 1-frame, 2-handle, 3-motor, 4-water lubricated high pressure piston pump.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Example 1

The embodiment of the present invention provides a water-lubricated high-pressure plunger pump. As shown in FIG. 1 , the high-pressure plunger pump includes a housing 10 having a through hole, and a cylinder 20 is disposed in the through hole, and the cylinder 20 is circumferentially The array is provided with a cylinder hole 21 (the cylinder hole 21 is as shown in FIG. 5 or FIG. 6). In order to facilitate the design of the water flow passage, the two end covers are respectively designed as the water inlet end cover 30 and the water outlet end cover 40. Specifically, as shown in FIG. 1, one end of the through hole in the casing 10 is provided with a water inlet end cover 30, that is, the right end of the through hole in FIG. 1 is provided with a water inlet end cover 30, the cylinder body 20 and the water inlet end cover 30. A return tray 50 is disposed between the return tray 50 and a plunger shoe assembly 51 inserted into the cylinder bore 21, and the piston movement in the cylinder bore 21 by the plunger shoe assembly 51 can pressurize the water flow; The other end of the through hole 10 is provided with a water outlet end cover 40, that is, the left end of the through hole in FIG. 1 is provided with a water end cover 40, and a distribution plate 60 is disposed between the cylinder block 20 and the water outlet end cover 40, and the distribution plate 60 is disposed on the distribution plate 60. The water inlet hole 61 and the water outlet hole 62 are provided. When the cylinder 20 rotates, the cylinder hole 21 absorbs water corresponding to the position of the water inlet hole 61, and the cylinder hole 21 is squeezed when it corresponds to the position of the water outlet hole 62. .

In the embodiment of the present invention, as shown in FIG. 2 and FIG. 3, the water inlet end cover 30 is provided with a water inlet passage 31 which can communicate with the outside, and the water outlet end cover 40 is provided with a water outlet passage 41 which can communicate with the outside. And the water outlet passage 41 communicates with the water outlet hole 62 on the distribution plate 60, and the water inlet passage 31 passes through the side gap 22 between the cylinder block 20 and the casing 10 (the side gap 22 is as shown in FIG. 4) and the distribution plate The water inlet hole 61 of the 60 is connected, so that the water entering from the water inlet passage 31 can enter the water inlet hole 61 of the front end through the side gap 22, and the water-lubricated high-pressure plunger pump is realized at the water inlet end cover 30. And the water inlet and outlet cover 40 respectively enter and exit water, so that the water flow channel design can be respectively performed on the water inlet end cover 30 and the water outlet end cover 40, thereby increasing the design space of the water flow channel, thereby enabling better design of the water flow channel. . The water inlet hole 61, which is referred to in the embodiment of the present invention, enters the water inlet hole 61, and indicates the water inlet hole 61 where the water flow arrives. As long as the piston movement of the plunger shoe assembly 51 causes a negative pressure in the cylinder hole 21, the water inlet hole can be The water flow at 61 is sucked into the cylinder bore 21.

Moreover, after the water-lubricated high-pressure piston pump is miniaturized, the overall heat dissipation area is small due to its small size, and it is easy to overheat during high-speed operation. After the solution provided by the embodiment of the present invention, the water is introduced from the water. The water entering the passage 31 passes through the cylinder 20 and reaches the water inlet hole 61, so that the cylinder 20 can be cooled well. The role of a water-lubricated high-pressure plunger pump.

In order to make the water inlet hole 61 on the distribution plate 60 communicate with the side gap 22 well, as shown in FIG. 3, the water outlet end cover 40 is further provided with a water guiding channel 42 at one end of the water guiding channel 42. The water inlet hole 61 on the distribution plate 60 communicates with the other end in communication with the side gap 22, so that the water guiding passage 42 can communicate with the water inlet passage 31 through the side gap 22 between the cylinder block 20 and the casing 10. The design manner of the water guiding channel 42 in the embodiment of the present invention includes but is not limited to the following solutions:

1. As shown in FIG. 3, the outlet end cover 40 is provided with a second shaft hole 43 for mounting a drive shaft, and the second shaft hole 43 is provided with a second bearing 44, and the water guiding passage 42 is designed to be from the inner end of the second bearing 44. After being worn to the outer end of the second bearing 44, it communicates with the water inlet hole 61 of the valve plate 60, so that the second bearing 44 can be lubricated and cooled while being in the water. Specifically, as shown in FIG. 3, the cylinder block 20 is shown. A distribution plate 60 and a thrust plate 70 are disposed between the distribution plate 60 and the thrust plate 70, and an end surface gap 63 is provided between the distribution plate 60 and the thrust plate 70. The end surface gap 63 communicates with the side gap 22 and The second shaft hole 43, wherein the second shaft hole 43 is a part of the water guiding passage 42, can pass from the inner end of the second bearing 44 to the outer end of the second bearing 44, passes through the outer end of the second bearing 44, and passes through the water outlet. The through hole formed inside the end cover 40 communicates with the water inlet hole 61, which is also a part of the water guiding passage 42.

2. As shown in FIG. 3, between the water outlet end cover 40 and the distribution plate 60, a water inlet gap 64 is provided at the water inlet hole 61, and the water inlet gap 64 communicates with the water inlet hole 61 and the side gap 22, This water inlet gap 64 is a form of the water intake passage 42.

The embodiment of the present invention simultaneously adopts the design manners of the above two water guiding channels 42.

Of course, as shown in FIG. 2, the water inlet end cover 30 is also provided with a first shaft hole 32 through which the drive shaft passes, and the first shaft hole 32 is provided with a first bearing 33 for cooling and lubricating the first bearing. 33. The embodiment of the present invention passes the water inlet passage 31 from the outer end of the first bearing 33 to the inner end of the first bearing 33.

The final course of the water inlet passage 31 in Fig. 2 is transmitted from the outer end of the first bearing 33 to the inner end of the first bearing 33, thereby achieving communication with the side gap 22, in fact, without the need for lubrication first In the case of the bearing 33, the water inlet passage 31 can also be directly passed out from the inner end surface 34 of the water inlet end cover 30 to achieve communication with the side gap 22 without To pass through the first bearing 33, this solution is not shown in the drawings because it is not an optimal solution.

In the embodiment of the present invention, the water entering from the water inlet passage 31 mainly flows through the side gap 22 to the water inlet hole 61 of the distribution plate 60, and the cooling of the cylinder block 20 is also enhanced in order to increase the water flow path, as shown in FIGS. 5 and 6. The embodiment of the present invention further provides a communication hole 23 in the axial direction of the cylinder block 20, and the communication hole 23 can communicate with the water inlet passage 31 and the water inlet hole 61 of the distribution plate 60, and the water flow passes through the communication hole 23 The cylinder 20 and the plunger shoe assembly 51 can be cooled to provide protection for the water lubricated high pressure piston pump. In order to improve the cooling effect, in the embodiment of the present invention, the communication hole 23 and the cylinder hole 21 are spaced apart in the circumferential direction. Generally, 10 holes are made in the circumferential direction, 5 of which are the communication holes 23, and 5 are the cylinder holes 21. Further, the cylinder bore 21 is spaced apart from the communication hole 23.

In general, the plunger shoe assembly 51 is slidably attached to the swash plate. To make the high pressure plunger pump more compact, as shown in FIGS. 1 and 2, the embodiment of the present invention will be inserted into the water inlet cap 30. The end face 34 is designed as a bevel so that the plunger shoe assembly 51 can be fitted to the bevel to move, thus, in contrast to the prior art, the embodiment of the invention eliminates the swash plate, so that the water-lubricated high-pressure plunger pump It is even more compact.

In the embodiment of the invention, the water-lubricated high-pressure plunger pump is preferably a small high-pressure plunger pump, and the small high-pressure plunger pump is mainly used on the hand-held spray device to realize the injection of the high-pressure liquid, so that the water inlet end can be closer to the holding. In the embodiment, the water inlet end cover 30 is designed as a high pressure piston pump installation end, and the water outlet end cover 40 is a water pump end of the high pressure piston pump pump, thereby facilitating the carrying and installation of the high pressure injection device.

Since the water inlet end cover 30 also needs to be fixedly installed, as shown in FIG. 1, the water inlet of the water inlet passage 31 is disposed at the side of the cylindrical surface of the water inlet end cover 30, so that the water inlet pipe can be conveniently combined with The inlet connection is not subject to interference that needs to be fixedly mounted on the high pressure piston pump at the inlet end.

Example 2

The embodiment of the invention provides a water-lubricated high-pressure plunger pump, in particular to a water-lubricated high-pressure plunger pump for lubricating a bearing, as shown in FIG. 1 , comprising a housing 10 having a through hole, and a through hole is provided therein The cylinder block 20 is provided with a cylinder bore 21 (the cylinder bore 21 is as shown in FIG. 5 or FIG. 6) on the cylinder block 20, and the water inlet end cover 30 and the water outlet end cover 40 are respectively disposed at two ends of the through hole. A water distribution tray 60 is disposed between the cylinder block 20 and the water outlet end cover 40. The water inlet end cover 30 is provided with a water inlet passage 31 communicating with the outside, and the water outlet end cover 40 is provided with a water outlet passage 41 communicating with the outside. The water inlet passage 31 communicates with the water inlet hole 61 of the flow regulating disk 60 through the side gap 22 between the cylinder 20 and the casing 10 (the side gap 22 is as shown in FIG. 4). In order to be able to complete the liquid pressurization, the present invention is provided with a returning disc 50 between the cylinder block 20 and the water inlet end cap 30, and the returning spool 50 is provided with a plunger shoe assembly 51 inserted into the cylinder bore 21. The two end caps are respectively designed as the water inlet end cover 30 and the water outlet end cover 40, so that the water flow passage can be more conveniently designed, and the water inlet passage 31 on the water inlet end cover 30 and the water outlet passage 41 on the water outlet end cover 40 can be designed. The working principle of the plunger shoe assembly 51 is similar to that of the embodiment 1, and will not be described herein.

As shown in FIG. 3, the water outlet end cover 40 of the embodiment of the present invention is provided with a shaft hole for mounting a drive shaft, and a bearing hole is provided at the shaft hole. The shaft hole in this embodiment is the second shaft hole 43 in the present invention. The bearing is the second bearing 44. In order to better lubricate and cool the second bearing 44, the water outlet end cover 40 is further provided with a water guiding passage 42 from the second bearing 44. After the end is passed to the outer end of the second bearing 44, it communicates with the water inlet hole 61 of the valve plate 60, so that the water flow can pass through the second bearing 44 and enter the water inlet hole 61, thereby achieving water lubrication and cooling of the second bearing 44. The utility model has the functions of protecting the second bearing 44 and prolonging the service life.

The bearing in the embodiment of the invention adopts a rolling bearing, so that the water in the entire shaft hole can lubricate and cool the rolling bearing.

The water guiding passage 42 may be, but not limited to, the following design: as shown in FIG. 1 and FIG. 3, a distribution plate 60 and a thrust plate 70, a distribution plate 60 and a thrust stop are sequentially disposed between the cylinder 20 and the water outlet end cover 40. An end face gap 63 at the water inlet hole 61 is provided between the disks 70, and the end face gap 63 communicates with the side gap 22 between the cylinder block 20 and the casing 10, and the second shaft hole 43. As a result, the water flowing out from the side gaps 22 can sequentially pass through the end face gap 63 and the second shaft hole 43, thereby achieving cooling and lubrication of the second bearing 44.

As shown in FIG. 3, the above second shaft hole 43 is a part of the water guiding passage 42 through which the water flow passes from the inner end of the second bearing 44 to the outer end of the second bearing 44, and the water flows into the second. After the shaft hole 43 passes through the remaining portion of the water guiding passage 42 to enter the distribution plate 60 The water inlet hole 61, wherein the remaining portion of the water guiding passage 42 may be a through hole formed inside the water outlet end cover 40, the through hole simultaneously communicating with the second shaft hole 43 and the water inlet hole 61, of course, the water outlet end cover here 40 includes both the end cap body and the outlet body mounted to the outlet end cap 40.

Of course, the end face gap 63 in addition to directing water flow to the bearing for lubrication and cooling, the end face gap 63 in the embodiment of the present invention also communicates with the water inlet hole 61, and the side gap 22 between the cylinder block 20 and the casing 10. The water inlet hole 61 can be made to communicate with the side gap 22, so that water flowing out from the side gap 22 can directly enter the water inlet hole 61 through the end face gap 63.

In order to make the water inflow more smooth, as shown in FIG. 3, the embodiment of the present invention further provides a water inlet gap 64 at the water inlet hole 61 between the water outlet end cover 40 and the distribution plate 60, and the water inlet gap 64 is equivalent to The water inlet passage 42 has no bearing lubrication and cooling effect, the water inlet gap 64 communicates with the water inlet hole 61, and the side gap 22 between the cylinder block 20 and the casing 10, so that the water flowing out from the side gap 22 can also be It enters the water inlet hole 61 through the water inlet gap 64.

As shown in FIG. 3, in order to prevent the water in the second shaft hole 43 from directly entering the water inlet hole 61, the embodiment of the present invention further provides a water barrier rib 45 between the water inlet gap 64 and the second shaft hole 43. The water at the second shaft hole 43 must be lubricated and cooled by the bearing before entering the water inlet hole 61, thereby ensuring the lubrication and cooling effect of the bearing. Of course, the water barrier rib 45 in the embodiment of the present invention is preferably disposed on the water outlet end cover 40, and the water barrier rib 45 is sealingly engaged with the distribution plate 60.

Example 3

The embodiment of the invention provides a water-lubricated high-pressure plunger pump, in particular to a water-lubricated high-pressure plunger pump for lubricating a bearing. As shown in FIG. 1 , the high-pressure plunger pump comprises a housing 10 having a through hole. A cylinder 20 is disposed in the hole, and a cylinder bore 21 is arranged on the cylinder 20 in a circumferential array (the cylinder bore 21 is as shown in FIG. 5 or FIG. 6), and the water inlet end cover 30 and the water outlet end cover are respectively disposed at two ends of the through hole. 40. A returning disc 50 is disposed between the cylinder block 20 and the water inlet end cover 30. The returning spool 50 is provided with a plunger shoe assembly 51 inserted into the cylinder bore 21; the water inlet end cap 30 is provided with an external connection Inlet passage 31, the end cap of the present invention having one end of the return disc 50 The water inlet passage 31 is provided on the upper side, so that the water flow passage can be designed more conveniently. Of course, the best way is to design the inlet channel 31 and the outlet channel 41 on the two end caps respectively, for example to facilitate the removal of high pressure water, the embodiment of the invention preferably is provided on the outlet cap 40 with the exterior Connected water outlet channel 41. Specifically, the design of the water inlet channel 31 and the water outlet channel 41 and the working principle of the plunger shoe assembly 51 can be implemented with reference to the embodiment 1, and details are not described herein again.

In order to enable the water of the water inlet passage 31 to enter the cylinder bore 21, the embodiment of the present invention is provided with a distribution plate 60 and a thrust plate 70 between the outlet end cover 40 and the cylinder block 20, and the water inlet passage 31 passes through the cylinder block 20. The side gap 22 between the housing 10 and the housing 10 (the side gap 22 is as shown in FIG. 4) communicates with the water inlet hole 61 of the valve plate 60, so that the water of the water inlet passage 31 can enter through the side gap 22. It goes to the water inlet hole 61 of the distribution plate 60 to enter the cylinder bore 21.

In order to drive the water-lubricated high-pressure piston pump, as shown in FIG. 2, the water inlet end cover 30 of the embodiment of the present invention further has a shaft hole through which the drive shaft passes, and a bearing is disposed at the shaft hole. The shaft hole is the first shaft hole 32 in the present invention, and the bearing is the first bearing 33 in the invention. The water inlet passage 31 passes from the outer end of the first bearing 33 to the inner end of the first bearing 33 to introduce water into the shell. Inside the body 10, in this way, after entering the water inlet passage 31, the water needs to flow through the first bearing 33 to enter the water-lubricated high-pressure piston pump, thereby realizing water lubrication of the first bearing 33 by the incoming water flow. And cooling, to protect the first bearing 33, to extend the service life.

In order to prevent water leakage at the first bearing 33, as shown in FIGS. 1 and 2, the embodiment of the present invention provides a mechanical seal assembly 80 located outside the first bearing 33 between the inlet end cap 30 and the drive shaft, Sealing can be performed by the mechanical seal assembly 80 without leakage of water at the first axial bore 32 in the middle of the inlet end cap 30.

In order to facilitate the design of the water flow channel, as shown in FIG. 7 and FIG. 8, the first bearing 33 in the embodiment of the present invention selects the sliding bearing, and the supporting surface 35 of the sliding bearing supporting the driving shaft is provided with a through groove 36, that is, sliding. The inner circumferential surface of the bearing that matches the outer peripheral surface of the drive shaft is provided with a through groove 36. Here, the through groove 36 is a part of the water inlet passage 31, and passes through the through groove 36 from the outer end of the first bearing 33 to the first bearing 33. Inner end, will Water is introduced into the interior of the housing 10.

The through grooves 36 in the embodiment of the present invention are spaced apart from each other on the support surface 35. Specifically, three spaced through grooves 36 may be provided in the support surface 35. In order to ensure the water lubricity and wear resistance of the sliding bearing, the sliding bearing in the embodiment of the present invention is made of a reinforced plastic such as PEEK (polyetheretherketone, English name polyetheretherketone).

Example 4

The embodiment of the present invention provides a water-lubricated high-pressure plunger pump. As shown in FIG. 1 , the high-pressure plunger pump includes a housing 10 having a through hole, and a cylinder 20 is disposed in the through hole, and the cylinder 20 is circumferentially The array is provided with a cylinder hole 21 (the cylinder hole 21 is as shown in FIG. 5 or FIG. 6), and the water inlet end cover 30 and the water outlet end cover 40 are respectively disposed at two ends of the through hole, and the cylinder body 20 and the water inlet end cover 30 are disposed between the array. There is a return tray 50. The return tray 50 is provided with a plunger shoe assembly 51 inserted into the cylinder bore 21, and a distribution plate 60 is disposed between the cylinder block 20 and the outlet end cover 40. In order to facilitate the design of the water flow channel, the water inlet end cover 30 is provided with a water inlet passage 31 which can communicate with the outside, and the water outlet end cover 40 is provided with a water outlet passage 41 which can communicate with the outside, due to the water inlet. The end cover 30 is not on the same side as the distribution plate 60. In order to allow the water entering the water inlet passage 31 to enter the cylinder bore 21 through the distribution plate 60, as shown in Figs. 5 and 6, the embodiment of the present invention also refills the cylinder block 20. A communication hole 23 is provided, and the water inlet passage 31 communicates with the water inlet hole 61 of the distribution plate 60 through the communication hole 23. In this way, the water can sequentially pass through the water inlet passage 31, the communication hole 23, and the water inlet hole 61 of the distribution plate 60, thereby realizing the design of the water inlet passage 31 on the rear end cover, thereby facilitating the high pressure of the water lubrication. The plunger pump is used on a hand-held high pressure spray device to enable it to be carried and installed better.

The water coming out of the communication hole 23 can directly reach the water inlet hole 61 through the end surface gap 63 between the distribution plate 60 and the thrust plate 70. Of course, the embodiment of the present invention further provides the following scheme: as shown in FIG. 3, at the water outlet end. The cover 40 is further provided with a water guiding passage 42. One end of the water guiding passage 42 communicates with the water inlet hole 61 on the distribution tray 60, and the other end passes through the communication hole 23 and the side gap 22 at the same time (the side gap 22 is as shown in FIG. 4). The water inlet passages 31 are respectively communicated with each other, so that the water flow passages are used to guide the water flow to the water inlet holes 61. The design of the specific water guiding channel 42 can be referred to, but not limited to, the scheme of the water guiding channel 42 in Embodiment 1 and Embodiment 2, and details are not described herein again.

In addition to the communication hole 23, the water inlet passage 31 in the embodiment of the present invention can also communicate with the water inlet hole 61 of the distribution plate 60 through the side gap 22 between the cylinder block 20 and the casing 10, so that the water inlet passage 31 comes out. Water can also pass through the side gap 22 to the water inlet opening 61 of the distribution plate 60.

After the embodiment of the present invention is used, the water flow can also cool the cylinder block 20 and the plunger shoe assembly 51 when passing through the communication hole 23, thereby realizing the protection of the water-lubricated high-pressure piston pump. In order to improve the cooling effect, the communication hole 23 and the cylinder hole 21 are spaced apart in the circumferential direction according to the embodiment of the present invention. Generally, 10 holes are made in the circumferential direction, 5 of which are the communication holes 23 and 5 are the cylinder holes 21, Further, the cylinder bore 21 is spaced apart from the communication hole 23.

In order to ensure the flow rate of the high pressure piston pump, it is necessary to make the cylinder bore 21 large enough. For this reason, the embodiment of the present invention designs the bore of the cylinder bore 21 to be larger than the bore diameter of the communication hole 23, so that most of the space on the cylinder block 20 is used in the cylinder. On the hole 21, ensure its flow. Of course, in the case of balancing the cooling and the flow rate, the embodiment of the present invention has the aperture of the communication hole 23 being 0.5 times to 0.8 times the aperture of the cylinder hole 21, and is generally selected to be 0.5 times, 0.6 times, 0.7 times or 0.8 times.

Example 5

The embodiment of the present invention provides a hand-held high-pressure injection device. As shown in FIG. 9 and FIG. 10, the high-pressure injection device includes a base 1 and a hand-held portion 2, and a motor 3 is disposed in the base 1, and the motor 3 is generally charged. The battery is powered by a battery or powered by a DC battery. In order to realize the hand-held solution of the water-lubricated high-pressure injection device, the embodiment of the present invention further includes any one of the water-lubricated high-pressure plunger pumps 4 mentioned in Embodiments 1 to 4. And the water inlet end cap 30 of the water-lubricated high-pressure piston pump 4 mentioned above is connected to the frame 1 for assembly.

Since the water inlet end cap 30 of the water-lubricated high-pressure piston pump is connected to the base 1, the water inlet on the water inlet end cover 30 can be located at the rear end of the hand-held high-pressure injection device, thereby facilitating the hand-held high pressure. Carrying and installation of the spray device.

In addition, in the water-lubricated high-pressure plunger pump and the hand-held high-pressure injection device in the embodiment of the present invention, the water in the water inlet passage 31 passes through the cylinder 20 and reaches the water inlet hole 61, so that the entering water can be opposite to the cylinder block. 20 is cooled. After the water-lubricated high-pressure piston pump is miniaturized, the overall heat dissipation area is small due to its small size, and it is easy to overheat during high-speed operation. After the solution provided by the present invention, the cylinder can be well The body 20 is cooled to function as a high pressure piston pump that protects the water from lubrication.

The embodiments of the present invention are mainly used in miniaturized hydraulic equipment, especially hand-held high-pressure injection devices, such as hand-held high-pressure fire extinguishing equipment and hand-held high-pressure washing equipment.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. All should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

A water-lubricated high-pressure plunger pump comprising a housing having a through hole, wherein the through hole is provided with a cylinder body, and the cylinder body is provided with a cylinder bore according to a circumferential array, wherein the through hole is One end is provided with a water inlet end cover, the other end is provided with a water outlet end cover, a returning disc is arranged between the cylinder body and the water inlet end cover, and a distribution plate is arranged between the cylinder body and the water outlet end cover Wherein, the water inlet end cover is provided with a water inlet passage communicating with the outside, the water inlet passage is in communication with the water inlet hole on the distribution plate; and the water outlet end cover is provided to be connectable to the outside And a water outlet passage communicating with the water outlet hole on the distribution plate.
The water-lubricated high-pressure plunger pump according to claim 1, wherein a side gap is formed between the cylinder and the casing, and the water inlet passage passes through the side gap and the distribution The inlet holes on the tray are connected.
The water-lubricated high-pressure plunger pump according to claim 1 or 2, wherein the water outlet end cover is further provided with a water guiding passage, one end of the water guiding passage is connected with the water inlet hole on the distribution plate The other end communicates with the water inlet passage through a side gap between the cylinder and the casing.
A water-lubricated high-pressure plunger pump according to any one of claims 1 to 3, wherein a water inlet of said water inlet passage is provided at a cylindrical side portion of said water inlet end cap.
A water-lubricated high-pressure plunger pump according to any one of claims 1 to 4, wherein said cylinder body is provided with a communication hole in the axial direction, and said water inlet passage also passes through said communication hole and said The inlet holes of the distribution plate are connected.
A water-lubricated high-pressure plunger pump according to claim 5, wherein said communication hole is spaced apart from said cylinder bore in a circumferential direction.
A water-lubricated high-pressure plunger pump according to claim 5 or 6, wherein a diameter of said cylinder bore is larger than an aperture of said communication hole.
The water-lubricated high-pressure plunger pump according to claim 7, wherein the diameter of the communication hole is 0.5 to 0.8 times the diameter of the cylinder bore.
A water-lubricated high-pressure piston pump according to any one of claims 1-8, wherein said returning disc is provided with a plunger shoe assembly inserted into said cylinder bore.
A water-lubricated high-pressure plunger pump according to claim 9, wherein The inner end surface of the water inlet end cover is a sloped surface, and the plunger shoe assembly is attached to the inclined surface to move.
A water-lubricated high-pressure plunger pump according to any one of claims 1 to 10, wherein said water-lubricated high-pressure plunger pump is a small high-pressure plunger pump, and said inlet end cap is a high-pressure plunger pump The installation end, the outlet end cover is a water pump end of the high pressure piston pump.
The water-lubricated high-pressure plunger pump according to any one of claims 1 to 11, wherein the water inlet end cover is provided with a first shaft hole through which the drive shaft passes, and the first shaft hole is provided There is a first bearing that passes from the outer end of the first bearing to the inner end of the first bearing.
The water-lubricated high-pressure piston pump according to any one of claims 1 to 11, wherein the water outlet end cover is provided with a second shaft hole for mounting a drive shaft, and the second shaft hole is provided with a second portion. a bearing, the water guiding passage is passed from an inner end of the second bearing to an outer end of the second bearing.
A hand-held high-pressure injection device comprising a base and a hand-held portion, wherein the machine is provided with a motor, characterized in that it further comprises a water-lubricated high-pressure plunger pump according to any one of claims 1-13, The water inlet end cap of the water-lubricated high-pressure piston pump is connected to the base.