KR20230033976A - Flow rate and a hydraulic control valve using the hydraulic pressure control - Google Patents

Abstract

The present invention relates to a flow rate and hydraulic pressure control valve using the hydraulic pressure control, comprising: a case including an inflow unit connected to a hydraulic pressure source, a discharge unit connected to a cylinder, and a drain unit connected to a storage tank, and having a sleeve insertion groove formed to be concave from one side in a direction to communicate with the inflow unit, the discharge unit, and the drain unit; a sleeve inserted into the sleeve insertion groove, and including a first chamber, a second chamber, and a third chamber, which are respectively connected to the input unit, the discharge unit, and the drain unit, and a first flow path penetrating in a longitudinal direction to connect the first chamber, the second chamber, and the third chamber; a first spool inserted into the first flow path to be able to make a reciprocating sliding motion in a longitudinal direction, and making two or more of the first to third chambers communicate with each other; and a hydraulic pressure control module having one side coming in contact with the first spool, and controlling the reciprocating sliding motion of the first spool by a pressure of a control fluid supplied from outside, and controlling the fluid discharged from the second chamber to the discharge unit into a preset flow rate at a preset pressure. Therefore, cost can be reduced.

Description

Hydraulic control flow and hydraulic control valve {FLOW RATE AND A HYDRAULIC CONTROL VALVE USING THE HYDRAULIC PRESSURE CONTROL}

The present invention relates to a hydraulically controlled flow rate and a hydraulic control valve, and more particularly, to a hydraulically controlled flow rate and a hydraulic pressure control valve capable of adjusting and discharging hydraulic pressure supplied from a hydraulic pressure source to a set flow rate and a set hydraulic pressure.

In general, a pressure reducing valve is a valve that can obtain a secondary control pressure proportional to the electromagnetic force (solenoid force) of an operating source such as a proportional solenoid.

This pressure reducing valve is a secondary control pressure proportional to the pressure current at the point where the pressure from the hydraulic source is equivalent to the electromagnetic force and spring force of the solenoid, the fluid force and spool spring force of the spool, and the force due to the cross-sectional area of the pin embedded in the spool. It is a mechanical component applied to various fields in the industry, such as swash plate control of hydraulic pumps, clutch separation, clamping force control, etc.

Conventional pressure reducing valves have been widely used in the form of manually operated pressure reducing valves that control a constant pressure only with the force of a spring without using a proportional solenoid, but at present, the control range for the secondary control pressure is very wide using a proportional solenoid, The electronic control method establishes a flexible control area.

Korean Patent Registration No. 10-1371105 also discloses an electronic proportional pressure reducing valve. In the electronic proportional pressure reducing valve of Registered Patent No. 10-1371105, a coil receiving current from the outside forms a magnetic force around the flanger to generate thrust for the flanger to move. The thrust generated by the flanger is transmitted to the pin, and the opening amount of the main spool is determined by comparing the sum of the strength of the thrust, the spring reaction force, and the reaction force generated by the area difference in the main spool. The secondary pressure is determined according to the amount of opening, and has a proportional relationship in which the secondary pressure increases as the strength of the electromagnetic force increases.

Korean Patent Publication No. 10-1371105

The present invention provides a hydraulically controlled flow and hydraulic control valve capable of adjusting and discharging hydraulic pressure supplied from a hydraulic source to a set flow rate and a set hydraulic pressure.

According to an embodiment of the present invention, the present invention includes an inlet connected to a hydraulic pressure source, an outlet connected to a cylinder, and a drain connected to a storage tank, and the inlet, the discharge, and the drain A case in which a sleeve insertion groove formed concavely in one direction is formed on either side so as to be in communication with each other; A first chamber, a second chamber, and a third chamber inserted into the sleeve insertion groove and connected to the inlet, the outlet, and the drain, respectively, and the first chamber, the second chamber, and the third chamber. a sleeve formed with a first flow path penetrating along the longitudinal direction to connect; A first spool inserted into the first flow path so as to be reciprocally sliding along the longitudinal direction and communicating with at least two of the first chamber, the second chamber, and the third chamber while performing the reciprocating sliding movement; And one side is in contact with the first spool, and while controlling the reciprocating sliding movement of the first spool by the pressure of the control fluid supplied from the outside, the fluid discharged from the second chamber to the discharge unit is set at a set flow rate and set pressure. It includes a hydraulic control module for adjusting.

In addition, the hydraulic control module includes a protrusion formed on one side to be inserted into the sleeve insertion groove, a hollow portion formed through the protrusion toward the protrusion from the other side so that the sleeve can be inserted into the protrusion, and the control a valve body including a control fluid inlet formed to communicate with the hollow portion at another side so that the fluid can flow into the hollow portion when the fluid is introduced; It is inserted into the hollow so as to be slidably movable by the control fluid, and one side is in contact with the other side of the first spool to provide a pressing force for pushing the first spool while sliding in the one direction when the control fluid is supplied. a second spool to; and a pressure control member provided at the other side of the hollow portion to adjust the pressure while providing a pressure greater than the pressure of the control fluid to the second spool.

In addition, the second spool may include a base body having a circular or polygonal columnar cross section crossing the longitudinal direction; a first spool body extending from one side of the base body and having a circular or polygonal cross section crossing the longitudinal direction; and a second spool body extending from the other side of the base body and having a circular or polygonal cross section crossing the longitudinal direction, wherein the cross section crossing the longitudinal direction of the first spool body has a size of the base body. Is formed larger than the size of the cross section crossing the longitudinal direction of the second spool body, the size of the cross section crossing the longitudinal direction of the second spool body is formed larger than the size of the cross section crossing the longitudinal direction of the base body, the first The size of the cross section of the first spool body and the size of the cross section of the second spool body are formed to be different from each other.

In addition, when the control fluid flows in, the pressure receiving area on the side of the first spool body is larger than that on the side of the second spool body so that the second spool can slide in a direction pushing the first spool. do.

In addition, the first spool may include a first spool body in the form of a column extending long and having a circular or polygonal cross section crossing the longitudinal direction; and a plurality of splices spaced apart from the other side of the first spool body to one side by a set distance, protruding from the outer circumferential surface of the first spool body and extending along the circumferential direction of the first spool body. include

In addition, any one of the plurality of splices blocks between the first chamber and the second chamber, and another one of the plurality of splices blocks between the second chamber and the third chamber. block

Also, a pressure receiving area of any one splend that blocks between the first chamber and the second chamber is smaller than that of another splend that blocks between the second chamber and the third chamber.

In addition, the pressure control member is provided with a portion inserted into the other side of the hollow portion, the pressure control block through which a hollow hole is formed along the longitudinal direction; a first elastic member having one side in contact with the other side of the second spool and the other side being inserted into the hollow hole, and providing a pressing force to press the second spool; a pressing pin, a portion of one side of which is inserted into the first elastic member, and the other side is in contact with the other side of the first elastic member so as to press the first elastic member; And a part is inserted into the hollow hole so that one side comes into contact with the pressure pin, and the rest protrudes out of the pressure control block, reciprocates in the longitudinal direction of the hollow hole by rotation, and adjusts the pressing force of the first elastic member. It includes a fastening member to

Details of other embodiments are included in the detailed description and drawings.

The hydraulically controlled flow and hydraulic control valve according to the present invention has the following effects.

First, since the flow rate and hydraulic pressure of the fluid supplied from the hydraulic source can be adjusted using other external hydraulic pressure instead of the hydraulic source, it can be applied in place of the conventional pressure reducing valve using a solenoid valve, thereby reducing costs. there is.

Second, by adjusting the ratio of the pressure receiving area of the first spool, where the first spool generates a force pushing the second spool, and the pressure receiving area, where the second spool generates a force pushing the first spool, the control fluid The set pressure of the fluid discharged into the cylinder according to the pressure of can be adjusted within various ranges.

1 is a cross-sectional view of a hydraulically controlled flow and hydraulic control valve according to an embodiment of the present invention.
FIG. 2 is an enlarged view of portion A of FIG. 1 .
3 is a cross-sectional view of a sleeve according to an embodiment of the present invention.
4 is a front view of a first spool according to an embodiment of the present invention.
5 is an enlarged view of a cross section of a hydraulic control module according to an embodiment of the present invention.
6 is a front view of a second spool according to an embodiment of the present invention.
7 is an enlarged view of a cross section of a pressure control member according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. This invention may be embodied in many different forms and is not limited to the embodiments set forth herein.

It is advised that the drawings are schematic and not drawn to scale. Relative dimensions and proportions of parts in the drawings are shown exaggerated or reduced in size for clarity and convenience in the drawings, and any dimensions are illustrative only and not limiting. In addition, the same reference numerals are used to indicate similar features in the same structural elements or parts appearing in two or more drawings.

The embodiments of the present invention specifically represent ideal embodiments of the present invention. As a result, various variations of the diagram are expected. Therefore, the embodiment is not limited to the specific shape of the illustrated area, and includes, for example, modification of the shape by manufacturing.

Hereinafter, with reference to FIGS. 1 to 7, a hydraulically controlled flow rate and hydraulic pressure control "eve" according to an embodiment of the present invention will be described.

A hydraulically controlled flow and hydraulic control valve 10 according to an embodiment of the present invention includes a case 100, a sleeve 200, a first spool 300 and a hydraulic control module 400.

Although not specifically shown in the drawings, the case 100 includes an inlet (not shown) connected to a hydraulic source, an outlet (not shown) connected to a cylinder, and a drain (not shown) connected to a storage tank. are equipped

The hydraulic source may be, for example, a hydraulic tank, and hydraulic oil of the hydraulic source is supplied through the inlet (not shown).

On either side of the case 100, a sleeve insertion groove 110 communicating with the inlet part (not shown), the discharge part (not shown), and the drain part (not shown) is formed concavely in one direction by a set depth. do.

The sleeve 200 is inserted into the sleeve insertion groove 110 . The sleeve 200 is elongated and includes a columnar sleeve body 210 having a circular or polygonal cross section crossing the longitudinal direction. A plurality of O-ring grooves 211, 212, 213, 214 spaced apart by a set distance along the length direction of the sleeve body 210 are formed on the outer circumferential surface of the sleeve body 210. O-rings are provided in the plurality of O-ring grooves 211 , 212 , 213 , and 214 to maintain airtightness between the sleeve 200 and the case 100 .

A first chamber 230, a second chamber 240, and a third chamber 250, 260 spaced apart by a set distance in the longitudinal direction are formed inside the sleeve body 210. In addition, a first flow path 220 connecting the first chamber 230, the second chamber 240, and the third chambers 250 and 260 and penetrating along the longitudinal direction of the sleeve body 210 is formed. do.

The first chamber 230 is connected to the inlet (not shown), the second chamber 240 is connected to the outlet (not shown), and the third chambers 250 and 260 are connected to the drain It is connected to a part (not shown). Therefore, when hydraulic fluid is supplied from the inlet source, it flows into the first chamber 230 through the inlet (not shown), and flows into the second chamber 240 and the third chamber along the first flow path 220. (250, 260).

Meanwhile, in the third chambers 250 and 260, an elastic member provided area (corresponding to 260) is formed in an area corresponding to a set depth from the other side of the sleeve body 210, in which an elastic member is provided. A second elastic member 301 covering a part of the first spool 300 is provided in the elastic member providing area 260 . This will be described in more detail later.

The first spool 300 is inserted into the first passage 220 of the sleeve 200 so as to be reciprocally sliding along the longitudinal direction. The first spool 300 communicates with at least two of the first chamber 230 , the second chamber 240 , and the third chambers 250 and 260 while performing a reciprocating sliding movement. Specifically, the first chamber 230 and the second chamber 240 are communicated with each other or the second chamber 240 and the third chambers 250 and 260 are communicated with each other.

The hydraulic control module 400 provides the force for operating the first spool 300 to achieve such an operation. The operating method of the first spool 300 will be described in more detail later.

The first spool 300 includes a first spool body 310 , a support plate 320 , and a plurality of splends 330 , 340 , 350 , and 360 . The first spool body 310 is elongated and is formed in the shape of a column having a circular or polygonal cross section intersecting in the longitudinal direction.

The support plate 320 is formed on either side of the first spool body 310 . In this embodiment, the support plate 320 is formed on the other side of the first spool body 310 . As will be described in detail later, the first spool 300 receives a pressing force from the second spool 413 of the hydraulic control module 400 . Accordingly, one side of the second spool 413 contacts the first spool 300 , and specifically, one side of the second spool 413 contacts the support plate 320 .

In addition, the support plate 320 serves to pressurize the second elastic member 301 provided while surrounding the other side of the first spool 300 when pressing force is transmitted from the second spool 413 .

The size of the cross section crossing the longitudinal direction of the support plate 320 is larger than that of the cross section crossing the longitudinal direction of the first spool body 310 .

The plurality of splens 330, 340, 350, and 360 are spaced apart from the support plate 320 toward one side of the first spool body 310 by a set interval, and the first spool body 310 It protrudes from the outer circumferential surface. In this embodiment, a first spool land 330, a second spool land 340, a third spool land 350, and a fourth spool land 360 are formed.

The splands 330 , 340 , 350 , and 360 protrude from the outer circumferential surface of the first spool body 310 and extend along the circumferential direction of the first spool body 310 . The outer circumferential surfaces of the splands 330 , 340 , 350 , and 360 are formed to contact the inner circumferential surface of the first flow path 220 .

Among the spool lands 330 , 340 , 350 , and 360 , the fourth spool land 360 is formed on one side of the first spool body 310 . One or a plurality of sealing member grooves 361 are formed on the outer circumferential surface of the fourth spool land 360, and a sealing member (not shown) such as an o-ring is coupled to the sealing member grooves 361. do.

An outer circumferential surface of the fourth spool land 360 contacts an inner circumferential surface of one side of the first flow path 220 . When the fluid is introduced into the sleeve 200 through the inlet (not shown), the sealing member (not shown) provided in the fourth spool land 360 causes the fluid to flow into the sleeve 220 and the sleeve 220 . It is possible to prevent water from leaking between the fourth splens 360 .

The first splint 330 blocks between the second chamber 220 and the third chambers 250 and 260, and the third splint 350 blocks the first chamber 210 and the 2 Block the chamber 220. Therefore, according to the movement of the first spool 300, the first chamber 210 and the second chamber 220 communicate with each other or the second chamber 220 and the third chambers 250 and 260 communicate with each other. do.

2, when the first spool 300 is inserted into the sleeve 200, the second elastic member 301 is between the first spool 300 and the sleeve 200. are provided The second elastic member 301 surrounds the other side of the first spool 300 and is provided in the elastic member provision area.

The hydraulic control module 400 controls the flow rate and hydraulic pressure of the fluid supplied through the inlet (not shown) to a set flow rate and a set pressure so that the fluid can be discharged to the cylinder.

The hydraulic control module 400 receives control hydraulic pressure from a separate external or internal supply source. One side of the hydraulic control module 400 is in contact with the other side of the first spool 300, and when the control hydraulic pressure is supplied, a force for sliding the first spool 300 in one direction is provided.

The hydraulic control module 400 includes a valve body 410, a second spool 420 and a pressure control member 430.

The valve body 410 is connected to the case 100, receives the control hydraulic pressure from the outside, and has a protrusion 411, a hollow part 413, and a control hydraulic pressure inlet 415.

The protrusion 411 is formed on either side of the valve body 410 and is inserted into the sleeve insertion groove 110 . As the protrusion 411 is inserted into the sleeve insertion groove 110 , the hydraulic control module 400 is connected to the case 100 .

The hollow part 413 is formed from the other side of the valve body 410 facing the protruding part 411 through the protruding part 411 . The hollow part 413 includes a first hollow 413a, a second hollow 413b, and a third hollow 413c.

The first hollow 413a is concave by a set length in a direction from the other side of the valve body 410 toward the protrusion 411 so that the pressure control member 430 can be inserted therein.

The second hollow 413b is inserted into the second spool 430 . The second hollow 413b extends from one end of the first hollow 413a toward the protrusion 411 by a set length. The size of the cross section crossing the longitudinal direction of the second hollow 413b is smaller than the size of the cross section crossing the longitudinal direction of the first hollow 413a.

Referring to FIG. 5 , the third hollow 413c is inserted into the other side of the sleeve 200 when the protrusion 411 is inserted into the sleeve insertion groove 110 . The third hollow 413c is penetrating from one end of the second hollow 413b to the protrusion 411 . The size of the cross section crossing the longitudinal direction of the third hollow 413c is larger than the size of the cross section crossing the longitudinal direction of the second hollow 413b. And it is formed smaller than the size of the cross section crossing the longitudinal direction of the first hollow (413a).

The control fluid inlet 415 formed in the valve body 410 includes a first control fluid inlet 415a and a second control fluid inlet 415b. The first control fluid introduction path 415a is formed into the valve body 410 from another side of the valve body 410 . In this embodiment, as shown in FIG. 5 , the first control fluid inlet passage 415a is formed in a direction parallel to the hollow part 413 .

The second control fluid inlet 415b is formed to communicate with the second hollow 413b while communicating with the first fluid inlet 415a. In this embodiment, as shown in FIG. 5 , the second control fluid inflow path 415b is formed from another side of the valve body 410 to the inside of the valve body 410, and the second control fluid The inlet 415b is formed in a direction crossing the first control fluid inlet 415a.

The second control fluid inlet 415b is connected in communication with the first control fluid inlet 415a at a position spaced apart from one side by a set distance, and the other side of the second control fluid inlet 415b is It is connected in communication with the second hollow (413b).

The second spool 420 is inserted into the hollow part 413 of the valve body 410 . Specifically, it is inserted into the second hollow 413 so as to be reciprocally sliding, and a part of one side of the second spool 420 protrudes into the third hollow 413c, and the second spool 420 A part of the other side protrudes into the first hollow 413a.

The second spool 420 includes a base body 421 , a first spool body 423 and a second spool body 425 . The base body 421 is formed in the shape of a column having a circular or polygonal cross section crossing the longitudinal direction.

The first spool body 423 extends along the longitudinal direction from either one side or the other side of the base body 421, and is formed in a columnar shape having a circular or polygonal cross section crossing the longitudinal direction. The size of the cross section crossing the longitudinal direction of the first spool body 423 is larger than that of the cross section crossing the longitudinal direction of the base body 421 .

The second spool body 425 extends along the longitudinal direction from one side and the other side of the base body 421, and is formed in the shape of a column having a circular or polygonal cross section crossing the longitudinal direction. The size of the cross section crossing the longitudinal direction of the second spool body 425 is also larger than that of the cross section crossing the longitudinal direction of the base body 421 .

Meanwhile, the size of the cross section of the first spool body 423 and the size of the cross section of the second spool body 425 are formed to be different from each other. The second spool 420 is configured to slide in a direction in which the second spool 420 pushes the first spool 300 when the control fluid is introduced from the control fluid inlet 415. The pressure receiving area of the first spool body 423 side is larger than the pressure receiving area of the second spool body 425 side.

The second spool 420 further includes a fixing protrusion 427 . The fixing protrusion 427 protrudes from the other side of the second spool body 425 . The fixing protrusion 427 is also formed in a columnar shape with a circular or polygonal cross section crossing the longitudinal direction, and the size of the cross section of the fixing protrusion 427 is smaller than that of the second spool body 425. do. The fixing protrusion 427 serves to fix one side of the first elastic member 433 of the pressure adjusting member 430 .

The pressure adjusting member 430 provides a pressing force to the second spool 420 so as to adjust the hydraulic pressure of the control fluid, and adjusts the pressing force provided to the second spool 420 . The pressure control member 430 is provided in the first hollow 413a of the hollow part 413 .

The pressure control member 430 includes a pressure control block 431, a first elastic member 433, a pressure pin 435 and a fastening member 437.

A portion of the pressure control block 431 is provided by being inserted into the other side of the hollow part 413, specifically, the first hollow part 413a, and a hollow hole 431a penetrating along the longitudinal direction is formed. . A second protrusion 431b inserted into the first hollow part 413a is formed on one side of the pressure control block 431 .

The first elastic member 433 has one side in contact with the second spool 420 and the other side inserted into the hollow hole 431a. The first elastic member 433 is provided as a spring having elastic force that is compressed and stretched. In this embodiment, the first elastic member 433 provides a tensile force as a pressing force for pressing the second spool 420 .

The pressing pin 435 is inserted into the hollow hole 431a while being coupled to the other side of the first elastic member 433 . One side of the pressure pin 435 is wrapped around the first elastic member 433, and the other side contacts the other side of the first elastic member 433 and the fastening member 437 at the same time.

The fastening member 437 is provided with a bolt 437a and a nut 437b. The bolt 437a reciprocates along the longitudinal direction by rotation, and one side of the bolt 437a is in contact with the other side of the pressing pin 435. When the bolt 437a pushes the pressure pin 435 by rotation, the pressure pin 435 compresses the first elastic member 433 . That is, the compressive force of the first elastic member 433 is controlled by the fastening member 437, and accordingly, the pressure of the control fluid moving the second spool 420 is adjusted.

Looking at the operation process of the hydraulically controlled flow rate and hydraulic control valve having the configuration as described above is as follows.

First, fluid having a hydraulic pressure of a certain pressure supplied through the hydraulic source (not shown) is introduced into the first chamber 230 through the inlet (not shown). Control fluid is introduced into the control fluid inlet 415 of the hydraulic control module 400 to adjust the set pressure of the fluid introduced through the inlet (not shown).

The control fluid flows into the second hollow 413b provided with the second spool 420 along the control fluid inlet 415 . The second spool 420 slides in one direction by the control fluid because the pressure receiving area of the first spool body 423 is larger than that of the second spool body 425 .

As the second spool 420 slides in one direction, it provides a pushing force (pressing force) to the first spool 300, and the first spool 300 also slides in one direction.

In an initial state before the control fluid is input, the chamber of the first chamber 230 is shielded by the third spool land 350 of the first spool 300 . However, when the first spool 300 is moved in one direction by the second spool 420, the first chamber 230 and the second chamber 240 are momentarily connected, and the second chamber ( 240) and the third chambers 250 and 260 are shielded. Pressure is momentarily transferred from the first chamber 230 to the second chamber 240, and this pressure is transferred to the first spool land 330. At this time, when the sum of the elastic force of the first elastic member 433 and the force due to the pressure generated from the first spool body 423 is equal to the force due to the pressure transmitted to the first spool land 330 Until then, the connection between the first chamber 230 and the second chamber 240 is separated.

At this time, since the pressure receiving area of the first spool land 330 is larger than that of the third spool land 350, the first spool 300 is formed by the fluid flowing into the second chamber 240. Due to the pressure formed, the first spool 300 slides in the other direction. In addition, while the first spool 300 slides in the other direction, a pushing force (pressing force) is provided to the second spool 420 . At the same time, when the first spool 300 slides in one direction, it is compressed, so that the tensile force generated in the second elastic member 301 is added, so that the second spool 420 slides in the other direction.

When the first spool 300 slides in one direction, the first chamber 230 and the second chamber 240 are again shielded by the third spool land 350, and momentarily the second chamber 240 and the third chambers 250 and 260 are connected. At this time, while a part of the fluid filling the second chamber 240 flows into the third chambers 250 and 260, the flow rate of the fluid in the second chamber 240 is adjusted.

As such, the force generated by the difference between the pressure receiving area of the first spool body 423 and the pressure receiving area of the second spool body 425 generated by the second spool 420 (the second spool 420 is The force that pushes the first spool 300) and the difference between the pressure receiving area of the first splen 330 and the pressure receiving area of the third splen 350 in the first spool 300 The first spool 300 performs a reciprocating sliding movement until the force (the force by which the first spool 300 pushes the second spool 420) becomes equivalent.

And while the first spool 300 slides back and forth, the second chamber 240 further receives fluid from the first chamber 230 or drains fluid to the third chambers 250 and 260. while adjusting the set flow rate and the set oil pressure to be discharged.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. will be.

Therefore, the embodiments described above should be understood as illustrative and not restrictive in all aspects, and the scope of the present invention is indicated by the claims to be described later, from the meaning and scope of the claims and their equivalent concepts. All changes or modified forms derived should be construed as being included in the scope of the present invention.

10: hydraulically controlled flow and hydraulic control valve
100: case
110: sleeve insertion groove
200: sleeve
210: sleeve body
211, 212, 213, 214: O-ring groove
230: first chamber
240: second chamber 250, 260: third chamber
300: first spool
310: first spool body
320: support plate
330: first spland
340: second spland
350: third splend
360: 4th spland
400: hydraulic control module
410: valve body
420: second spool
430: pressure control member

Claims (8)

It has an inlet part connected to a hydraulic pressure source, a discharge part connected to a cylinder, and a drain part connected to a storage tank, and is formed concavely in one direction from either side so as to communicate with the inlet part, the discharge part, and the drain part. A case in which a sleeve insertion groove is formed;
A first chamber, a second chamber, and a third chamber inserted into the sleeve insertion groove and connected to the inlet, the outlet, and the drain, respectively, and the first chamber, the second chamber, and the third chamber. a sleeve formed with a first flow path penetrating along the longitudinal direction to connect;
A first spool inserted into the first flow path so as to be reciprocally sliding along the longitudinal direction and communicating with at least two of the first chamber, the second chamber, and the third chamber while performing the reciprocating sliding movement; and
One side is in contact with the first spool, and controls the reciprocating sliding movement of the first spool by the pressure of the control fluid supplied from the outside while controlling the fluid discharged from the second chamber to the discharge unit to a set flow rate and a set pressure. A hydraulically controlled flow and hydraulic control valve comprising a hydraulic control module to do. According to claim 1,
The hydraulic control module,
A protrusion formed on one side to be inserted into the sleeve insertion groove, a hollow portion formed through the protrusion from the other side toward the protrusion so that the sleeve can be inserted into the protrusion, and when the control fluid flows into the hollow portion a valve body including a control fluid inlet formed to communicate with the hollow part at another side so as to be able to;
It is inserted into the hollow so as to be slidably movable by the control fluid, and one side is in contact with the other side of the first spool to provide a pressing force for pushing the first spool while sliding in the one direction when the control fluid is supplied. a second spool to; and
A hydraulically controlled flow and hydraulic control valve comprising a pressure control member provided on the other side of the hollow portion to adjust the pressure while providing a pressure greater than the pressure of the control fluid to the second spool. According to claim 2,
The second spool,
A base body in the form of a column having a circular or polygonal cross section crossing the longitudinal direction;
a first spool body extending from one side of the base body and having a circular or polygonal cross section crossing the longitudinal direction; and
A second spool body in the form of a column extending from the other side of the base body and having a circular or polygonal cross section crossing the longitudinal direction,
The size of the cross section crossing the longitudinal direction of the first spool body is larger than the size of the cross section crossing the longitudinal direction of the base body, and the size of the cross section crossing the longitudinal direction of the second spool body is the base It is formed larger than the size of the cross section crossing the longitudinal direction of the body,
A hydraulically controlled flow and hydraulic control valve in which the size of the cross section of the first spool body and the cross section of the second spool body are formed to be different from each other. According to claim 3,
When the control fluid is introduced, the hydraulic pressure area of the first spool body is larger than that of the second spool body so that the second spool can slide in a direction pushing the first spool. Controlled flow and hydraulic control valves. According to claim 2,
The first spool,
A first spool body in the form of a column extending long and having a circular or polygonal cross section crossing the longitudinal direction; and
A plurality of splends are formed spaced apart from the other side toward one side of the first spool body by a set distance, and protrude from the outer circumferential surface of the first spool body to extend along the circumferential direction of the first spool body. Hydraulically controlled flow and hydraulic control valves. According to claim 5,
Any one of the plurality of splices blocks between the first chamber and the second chamber, and another one of the plurality of splices blocks between the second chamber and the third chamber. Hydraulically controlled flow and hydraulic control valves. According to claim 6,
A hydraulically controlled flow rate in which the pressure receiving area of any one splend blocking between the first chamber and the second chamber is smaller than the pressure receiving area of the other splend blocking between the second chamber and the third chamber. and a hydraulic control valve. According to claim 2,
The pressure control member,
A pressure control block having a part inserted into the other side of the hollow part and having a hollow hole penetrating along the longitudinal direction;
a first elastic member having one side in contact with the other side of the second spool and the other side being inserted into the hollow hole, and providing a pressing force to press the second spool;
a pressing pin, a portion of one side of which is inserted into the first elastic member, and the other side is in contact with the other side of the first elastic member so as to press the first elastic member; and
One side is inserted into the hollow hole so that one side comes into contact with the pressure pin and the other protrudes out of the pressure control block, reciprocates in the longitudinal direction of the hollow hole by rotation and adjusts the pressing force of the first elastic member A hydraulically controlled flow and hydraulic control valve including a fastening member.

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