KR20160071041A - A linear reciprocating typed piston pump - Google Patents

A linear reciprocating typed piston pump Download PDF

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Publication number
KR20160071041A
KR20160071041A KR1020140178259A KR20140178259A KR20160071041A KR 20160071041 A KR20160071041 A KR 20160071041A KR 1020140178259 A KR1020140178259 A KR 1020140178259A KR 20140178259 A KR20140178259 A KR 20140178259A KR 20160071041 A KR20160071041 A KR 20160071041A
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KR
South Korea
Prior art keywords
piston
control valve
valve
space
flow path
Prior art date
Application number
KR1020140178259A
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Korean (ko)
Inventor
박종오
Original Assignee
박종오
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Publication date
Application filed by 박종오 filed Critical 박종오
Priority to KR1020140178259A priority Critical patent/KR20160071041A/en
Publication of KR20160071041A publication Critical patent/KR20160071041A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N13/00—Lubricating-pumps
    • F16N13/02—Lubricating-pumps with reciprocating piston
    • F16N13/04—Adjustable reciprocating pumps

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reciprocating Pumps (AREA)

Abstract

The present invention relates to a linear reciprocating piston pump in which a valve body (31) is slidably disposed in a housing (32) of the control valve (30) And an outlet port 37 is formed at the center of the inlet port 36. The outlet ports 37 and 38 are spaced from both sides of the inlet port 36 to discharge the compressed air to the outside. The flow paths 40 and 41 are formed in the inner space of the pump head 15 so as to be divided into upper and lower parts by the pistons 13 The flow path 42 is communicated with the inlet port 36 of the control valve and is supplied with compressed air and the flow path 43 is communicated with the control valve 30 And the space portion 45 between the housing 32 and the lower end of the valve body 31 and the space portion 17 provided below the pump head The flow path 44 is communicated with the pilot valve 50 while the flow path 44 is provided in the space portion 46 between the housing 32 of the control valve and the upper end of the valve body 31 and the upper space portion 16 of the pump head The end of the oil passage 42 and the end of the oil passage 44 are selectively connected to the pilot valve 51 by pilot valves 50 and 51 which are communicated with the pilot valve 51 and actuated by the contact when the piston reciprocates, And the compressed air is supplied to the space portions 45 and 46 between the housing of the control valve and the end portion of the piston through the oil passage 44 to change the operating direction of the piston of the control valve.
The present invention simplifies the structure of the control valve operated with compressed air and operates stably, so that the piston pump piston can be linearly reciprocated automatically by the control valve, thereby improving the operational stability of the pump, The reliability of the product is improved, and the manufacturing cost can be reduced.

Description

Description A LINEAR RECIPROCATING TYPE PISTON PUMP

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear reciprocating piston pump for reciprocating a piston reciprocating by compressed air and sucking and discharging the viscous oil under the control of a control valve. To an improved linear reciprocating piston pump for controlling the linear reciprocating movement of the piston by controlling the inflow and outflow.

Generally, when changing automobile engine oil or mission oil, use an oil change device that pumps and supplies oil and removes the oil from the engine or mission quickly and easily. In addition, pumping of a viscous oil, such as the transfer of high viscosity lubricating oil to a dispenser nozzle, or the injection of an automobile oil, must be discharged at high pressure in order to feed oil from the oil storage tank through the hose to the distributor nozzle, Is mainly made by reciprocating pistons.

As such a viscous oil supply pump, linear reciprocating piston pumps are widely used. An example of the piston structure of such a reciprocating piston pump is disclosed in Laid-Open Publication No. 10-2014-0030222 (published on April 11, 2013), which is provided with a pilot valve and which, in response to the operation of the pilot valve, And the piston is reciprocated in the pump cylinder by compressed air to control the supply of the viscous fluid such as oil by controlling the supply of compressed air in the chamber divided by the piston.

However, the reversing valve conventionally used in the lubricating oil distribution system employs a valve structure in which a plurality of parts are assembled to control the supply of compressed air into the pump cylinder in response to the pilot valve installed in the pump cylinder to operate the piston There is a problem that the malfunction of the pump due to the frequent failure of the reversing valve or the stoppage of the operation is frequent so that the reliability of the pump operation is low and the manufacturing cost is increased due to the complicated structure of the reversing valve.

Open Patent No. 10-2014-0030222 (published on April 11, 2014)

It is an object of the present invention to provide a linear reciprocating piston pump for supplying a viscous fluid such as the above-mentioned conventional oil, which employs a simplified piston to solve the problem of the control valve for controlling the operation of the piston, And to provide a linear reciprocating piston pump with a control valve with improved operational reliability.

In order to achieve the above object, a linear reciprocating piston pump according to the present invention comprises: a pump body formed with an internal space for sucking and discharging a viscous fluid; a pump body mounted on a pump head above the pump body, A control valve installed on a side of the pump head to selectively open and close a compressed air passage so as to control the reciprocating movement of the piston, and a piston rod of the piston, And a lower end of the piston rod is tubular and the inner space forms a flow path and a port is formed on an upper end side surface of the pump body,

The control valve includes a valve body slidably disposed in the housing, an inlet port through which compressed air flows from the outside is formed in the housing, and an outlet port through which compressed air is discharged to the outside is formed at both sides of the inlet port. In addition,

Wherein a portion of the flow paths communicates with upper and lower side space portions divided by a piston in an inner space of the pump head, the flow path being connected to the inlet of the control valve The compressed air is always supplied to be communicated,

The flow path communicates with the pilot valve provided in the space portion between the housing of the control valve and the lower end portion of the valve body and the space portion under the pump head while the flow path communicates with the space portion between the housing of the control valve and the upper end portion of the valve body And a pilot valve provided in an upper space portion of the pump head,

The end portions of the flow path and the end portions of the flow path are selectively communicated by the pilot valve by the pilot valves operated by the contact in the reciprocating motion of the piston and are selectively supplied to the space portions between the housing of the control valve and the end portion of the piston through the flow path, So that the operation direction of the piston of the control valve is switched.

The valve body is formed with three small diameter small diameter portions so that a space is formed between the valve body and the inner side surface of the housing. An inlet port through which compressed air flows from the outside is formed at the center of the valve body, The space formed between the small diameter portions and the inner side surface of the housing by the movement of the valve body to the left and right sides is arranged to selectively communicate with the inlet and the outlet, To be supplied and discharged.

The pilot valves are provided with valve pins protruding from upper and lower side space portions of the pump head in the piston incorporated therein. When the piston of the pump head contacts the pilot valve pin when the piston moves up and down, The upper end portion of the flow path is selectively communicated with the end portion of the flow path so that the compressed air is supplied to the space portion between the housing of the control valve and the upper and lower ends of the piston through the flow path so that the movement direction of the piston of the control valve is switched Lt; / RTI >

In addition, the inner ends of the flow paths are disposed at positions close to the left and right sides of the inlet port of the control valve so that the inlet port communicates with any one of the flow paths as the valve body of the control valve moves up and down, Is configured to communicate with one of the outlets.

According to the present invention, since the structure of the control valve operated by compressed air is simplified and operated stably, the piston of the piston pump can be linearly reciprocated automatically by the control valve, thereby improving the operational stability of the pump, The reliability of the product is improved by reducing the possibility of occurrence of a failure, and the manufacturing cost can be reduced.

1 shows a schematic use example of a linear reciprocating piston pump for supplying a viscous fluid to a distributor;
2 is a schematic cross-sectional view of a linear reciprocating piston pump with an improved control valve according to the present invention.
3 is a schematic plan view showing the flow path of the control valve of FIG. 2;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings which illustrate an embodiment of a linear reciprocating piston pump having an improved control valve according to the present invention.

1, the linear reciprocating piston pump 1 according to the present invention is connected to the oil tank 2 as viscous fluid, and is connected to the piston pump 1 (1) by compressed air supplied from a compressed air supply source 3, Is used to suck the oil of the tank 2 and to discharge it to the distributor 5. [ The piping (6) for supplying compressed air to the piston pump (1) in the compressed air supply source (3) is provided with at least one filter (7) for removing foreign substances which may be contained in the compressed air, A valve 8 and a pressure regulator 9 for opening and closing the pressure regulator 9 are normally provided.

2 to 3, the linear reciprocating piston pump 1 according to the present invention includes a pump body 10 having an internal space for sucking and discharging the viscous fluid, A pump head 15 mounted on the upper side of the pump head 15 and installed to be reciprocatable in the internal space 14 of the piston 13 and a side of the pump head for selectively controlling the reciprocating motion of the piston 13, And includes a control valve 30 that opens and closes. The inner space of the cylinder 14 is divided by the piston 13 into a variable upper space portion 16 and a lower space portion 17. [

The lower end of the pump body 10 is directly connected to the oil tank or connected to the tank through a hose to receive the oil sucked into the internal space according to the operation of the piston. To allow oil to enter the pump body, but not to discharge.

A piston rod 18 of the piston 13 is disposed in the inner space of the pump body and a seal member 21 is provided on the outer surface of the piston rod to divide the inner space of the pump body in an airtight manner, The lower end portion is formed in a tubular shape so that the inner space forms the oil passage 19 and is laterally opened at the upper end of the oil passage to allow the oil to flow into the space between the inner side of the pump body and the piston rod, And is then discharged to the outside through the port 20 formed in the casing.

A check valve 23 is provided at the lower end of the piston rod so that the oil sucked into the internal space of the pump body flows into the oil passage 24 formed by the internal space of the piston rod and does not flow backward.

When the piston 13 moves upward in the pump apparatus having such a structure, the oil passage 19 inside the pump body, which is divided by the piston rod 18, becomes low in pressure, The oil is introduced through the check valve 12 and the oil contained in the space between the outer surface of the piston rod 18 and the inner surface of the pump body 10 above the seal member 21 of the piston rod 18 flows through the port 20.

Then, when the piston 13 is moved downward, the flow passage 19, which is the internal space of the pump body 10, is blocked by the check valve 12 at the lower end, while the check valve (not shown) provided at the lower end of the piston rod 23 are opened so that the oil contained in the lower space inside the piston rod flows into the space between the piston rod and the inside surface of the pump body through the internal space of the piston rod through the check valve 23 provided at the lower end of the piston rod 18 . In this state, as described above, when the piston moves upward again, the oil contained in the space between the piston rod and the inner surface of the pump body is discharged through the port 20, and thus the viscous oil is pumped by the reciprocating movement of the piston .

The upward and downward reciprocating movement of the piston is performed by controlling the compressed air passage by the control valve 30 in which the valve body 31 is slidably disposed in the housing 32.

The valve body 31 is formed with three small diameter small diameter portions 33, 34 and 35 so that a space is formed between the valve body 31 and the inner side surface of the housing 32. The housing 32 is formed with an inlet port 36 through which compressed air flows from the outside and is formed with discharge ports 37 and 38 spaced from both sides thereof to discharge compressed air to the outside. The spaces formed between the small diameter portions 33, 34 and 35 and the inner side surface of the housing 30 are selectively placed in communication with the inlet port 36 and the outlet ports 37 and 38, So that the compressed air can be selectively supplied and discharged.

Compressed air flow passages 40, 41, 42, 43, 44 are formed on the side of the pump head 15 opposed to the control valve 32 so as to extend in the vertical direction, that is, in the longitudinal direction of the pump head . Since it is practically difficult to form the flow path in the form of a hole, the flow path is formed in the form of a groove on the outer surface of the pump head, and then the cover 45 is hermetically fixed thereon, .

Each of the outer ends of the groove-shaped flow paths 40 and 41 communicates with the upper and lower space portions 16 and 17 divided by the piston 13 in the inner space of the pump head at upper and lower ends. The inner ends of the flow paths 40 and 41 are disposed at positions close to the left and right sides of the inlet 36 of the control valve 30 so that the valve body 31 of the control valve moves upward Communicates with one of the flow paths 40 and 41 while the other flow path which is not communicated communicates with one of the discharge ports 37 and 38. [

The flow path 42 always communicates with the inlet 36 of the control valve and is supplied with compressed air.

The outer ends of the oil passages 40 and 41 are also in communication with both side space portions divided by the piston in the cylinder of the pump head so that the compressed air introduced through the inlet port 36 flows through the oil passage 40 The upper space 16 on the opposite side of the pump head communicates with the outside through the oil passage 41 and the discharge port 38 so that the piston 13 moves upward.

In contrast, when the valve body 31 of the control valve 30 moves and the inlet port 36 communicates with the flow path 41, the compressed air introduced through the inlet port passes through the flow path 41, While the lower space 17 on the opposite side thereof communicates with the discharge port 37 through the oil passage 40 to move the piston downward.

 The flow path 43 is connected to a space portion 45 between the housing 32 of the control valve 30 and the lower end of the valve body 31 and a pilot valve The flow path 44 communicates with a pilot valve (not shown) provided in the space portion 46 between the housing 32 of the control valve and the upper end of the valve body 31 and the upper space portion 16 of the pump head 51).

The lower space portion 17 indicated by red in the drawing, the flow path 42 is a portion to which compressed air is supplied and the discharge port 38 communicated with the upper space portion 16 is shown in sky blue, The marked portion indicates the flow path 43 communicating with the space portion 46 on the upper side of the control valve and the pink portion indicates the flow path 44 communicating with the space portion 45 below the control valve.

Both end portions of the flow path 42 communicate with the pilot valves 50 and 51, respectively. The pilot valves 50 and 51 are provided with valve pins 57 and 58 protruding into the upper and lower space portions 16 and 17 of the pump head at the pistons 55 and 56 incorporated therein The piston 55 of the pilot valve 50 moves upward so that the upper end of the oil passage 42 and the oil passage 44 And the compressed air is supplied to the space 45 between the housing of the control valve and the lower end of the piston to move the piston of the control valve downward.

The piston 56 of the pilot valve 51 is moved to move the oil passage 42 to the lower space portion 17 by moving the piston 13 downward and coming into contact with the projecting pin 58 provided in the lower space portion 17, The compressed air of the flow path 42 flows into the space 46 between the housing of the control valve and the upper end of the piston and the piston of the control valve moves in the opposite direction .

As the piston 13 automatically reciprocates linearly with the supply of the compressed air controlled by the control valve, the viscous fluid flows through the tubular piston rod to the port 20 ). ≪ / RTI >

The present invention can be used to easily and quickly exchange or supply the viscous fluid automatically, such as automobile engine oil or mission oil.

1: piston pump 10: pump body
12: Check valve 13: Piston
14: internal space 15: pump head
16, 17: Space part 18: Piston rod
19: Euro 20: Port
21: Seal member 23: Check valve
24: EURO 30: Control valve
31: valve body 32: housing
33, 34, 35: Small diameter portion 36: Inlet portion
37, 38: outlet 40, 41, 42, 43, 44:
50, 51: Pilot valve 57, 58: Valve pin
55, 56: Piston

Claims (4)

A pump head 15 mounted on a pump head at an upper portion of the pump body and provided with a piston 13 capable of reciprocating in an inner space 14, the pump body 15 having an inner space for sucking and discharging the viscous fluid, A control valve 30 mounted on a side of the pump head for selectively opening and closing a compressed air flow path to control the reciprocating movement of the piston 13, 18 are arranged so as to divide the internal space in an airtight manner and the lower end portion of the piston rod is tubular and the internal space forms the flow passage 19 and the port 20 is formed on the upper end side surface of the pump body As a result,
A valve body 31 is slidably disposed in the housing 32 of the control valve 30. An inlet 36 through which the compressed air flows from the outside is formed at the center of the housing 32, Respectively, so that compressed air is discharged to the outside,
Compressed air flow passages 40, 41, 42, 43 and 44 are formed on the side of the pump head 15 opposed to the control valve 32. Each of the flow passages 40, (16) and (17) divided by the piston (13) in the inner space of the control valve (15), and the flow path (42) is always in communication with the inlet (36) ≪ / RTI &
The flow path 43 includes a space 45 between the housing 32 of the control valve 30 and the lower end of the valve body 31 and a pilot valve 50 provided in the space 17 below the pump head. While the flow path 44 communicates with the pilot valve 51 provided in the space portion 46 between the housing 32 of the control valve and the upper end portion of the valve body 31 and the upper space portion 16 of the pump head, Respectively,
The end of the flow path 42 and the end of the flow path 44 are selectively communicated by the pilot valve and the flow path 44 is opened by the pilot valve 50 or 51 operated by the contact in the reciprocating motion of the piston Wherein the compressed air is supplied to the space portions (45, 46) between the housing of the control valve and the end portion of the piston so that the operation direction of the piston of the control valve is switched. The valve body according to claim 1, wherein the valve body (31) is formed with three small diameter small diameter portions (33, 34, 35) so that a space is formed between the valve body (31) An inlet port 36 through which compressed air flows from the outside is formed at the center and discharge ports 37 and 38 for discharging the compressed air to the outside are formed at both sides of the inlet port 36, The spaces formed between the small diameter portions 33, 34 and 35 and the inner side surface of the housing 30 by the movement are arranged to selectively communicate with the inlet port 36 and the discharge ports 37 and 38, respectively, And the second piston is connected to the second piston. The valve apparatus according to claim 2, wherein the pilot valves (50) and (51) are provided with valve pins (57) protruding from upper and lower side space portions (16,17) of the pump head in the pistons (55) And the pistons 55 and 56 of the pilot valves 50 and 51 are in contact with the pilot valve pins 57 and 58 when the piston 13 of the pump head moves up and down The upper end portion of the oil passage 42 and the end portion of the oil passage 44 are selectively communicated with each other so as to communicate with the space portions 45 and 46 between the housing of the control valve and the upper and lower ends of the piston through the oil passage 44, And the direction of movement of the piston of the control valve is switched. The control valve according to claim 3, wherein the inner ends of the flow paths (40, 41) are disposed at positions close to the left and right sides of the inlet port (36) of the control valve (30) so that the valve body Wherein the inlet port is in communication with any one of the flow passages 40 and 41 while the other unconnected flow path is in communication with one of the outlet ports 37 and 38. The linear reciprocating piston pump according to claim 1,
KR1020140178259A 2014-12-11 2014-12-11 A linear reciprocating typed piston pump KR20160071041A (en)

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KR1020140178259A KR20160071041A (en) 2014-12-11 2014-12-11 A linear reciprocating typed piston pump

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Application Number Priority Date Filing Date Title
KR1020140178259A KR20160071041A (en) 2014-12-11 2014-12-11 A linear reciprocating typed piston pump

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KR20160071041A true KR20160071041A (en) 2016-06-21

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KR1020140178259A KR20160071041A (en) 2014-12-11 2014-12-11 A linear reciprocating typed piston pump

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140030222A (en) 2011-04-27 2014-03-11 그라코 미네소타 인크. Method to prevent debris build-up on reciprocating air motor pilot valves

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140030222A (en) 2011-04-27 2014-03-11 그라코 미네소타 인크. Method to prevent debris build-up on reciprocating air motor pilot valves

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