JPS5838642B2 - Seigiyo Ben Sochi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a control valve device used in a hydraulically operated system, and particularly to a control valve device that utilizes a small volume pilot flow to control a large volume main flow.

Generally, in a fluid pressure operating system, when attempting to control a large volume regardless of flow rate control, pressure control, or direction, a small volume pilot flow is used to control a large volume main flow. Control means are often used.

This kind of control means is a system that is somewhat satisfactory in that it is possible to perform a correspondingly large-capacity control operation just by using a relatively small control valve. However, it still has some disadvantages.

That is, the main ones are, so far, the flowmeter (
Or, it is only used for directional control, or at least performs flow rate control and unload control, which is a type of pressure control, and a single control valve device is used for all of these flow rate control, pressure control, and directional control. I can't find anything that would allow me to do this, which means that I have to construct a control valve device that fits each circuit in accordance with the requirements of each circuit. The point is that it is difficult to standardize.

Therefore, if a single control valve device can be freely used for flow control, pressure side (2) or direction control, or a combination of these, this type of control valve device will become a standard. This is extremely advantageous in terms of

Particularly in this case, as has recently been seen in many pump units, etc., all that is required is to stack and install various standardized pilot circumferential valves (2) on the antibacterial valve body. If you can perform the control operation according to the pilot control valve,
It becomes possible to create all kinds of circuit modules while simplifying piping work and facilitating maintenance and inspection, and the effect is further doubled in standardizing this type of control valve device.

From this point of view, the main purpose of the present invention is to provide various standardized pilot control valves for a single control valve device, in other words, throttle valves, flow control valves, etc. The main flow can be adjusted simply by selectively stacking and installing flow rate control valves, pressure control valves such as relief valves and sequence valves, or directional valves such as load nick valves and various directional control valves. The main object of the present invention is to provide an improved control valve device of this type in which each pilot element can have a corresponding function.

Another object of the present invention is to provide a control valve device of this type that can be modularized as a unit by integrally combining an appropriate number of the valve devices. be.

Therefore, in the present invention, in order to achieve the above main objective, two parallel valve holes are bored in the valve body, and two upper and lower annular grooves are opened at the sides of these two valve holes. At the same time, these annular grooves are connected to a supply port and a discharge port opened on the outer surface of the valve body, and on the other hand, a pilot flow supply passage is opened at a predetermined position of the valve mounting seat, which is also formed on the outer surface of the valve body. and a discharge passage 1, respectively, and a spool is slidably inserted into each of the two valve holes to divide the inside of each valve hole into two upper and lower chambers. a center spring is interposed between the spools and the spools to hold the spools at intermediate positions within the valve hole, and keep the spools in a state of blocking communication between the two annular grooves and the valve hole; Each of the spools is provided with a through hole that selectively communicates the two annular grooves with a lower chamber in the valve hole on each side in response to movement in the vertical direction from the intermediate position, and further, The valve body has two take-out ports each communicating with a lower chamber in each of the valve holes through an orifice, and two take-out ports each branching from a portion of the take-out ports located one outlet side of the orifice to which the valve is attached. Two pilot passages that open at predetermined positions of the seat are formed, and a detection orifice is interposed in the middle of each of these pilot passages, and a portion between the external opening and the detection orifice in each pilot passage is provided on each side. This type of control valve device is constructed by communicating with the upper chamber within the valve hole.

In addition, in the present invention, in order to achieve yet another object, in addition to the above-mentioned configuration, two upper and lower annular grooves formed in the valve body are respectively opened on the outer surface of the valve body by a through hole. I let him do it.

Note that examples will be described below that will be helpful in understanding the present invention.

Valve control device 1 according to the present invention shown in FIGS. 1 to 3
The one-piece type consists of a valve body 2, a cover 3 covering the upper part of the valve body, and a sub-plate 4 attached to the lower part, which are integrally connected with bolts 5, 6 and a through bolt 7 to form a It forms two valve bodies.

As shown in FIGS. 4 to 9, the valve body 2 has two valve holes 8, 9 and passages 10, 11 extending vertically in parallel and extending over the valve holes 8.9. two annular grooves 12 and 13 formed in the middle thereof, and communication passages 14 and 15 that communicate with one of the annular grooves 12;
A communication passage 16 that also communicates with the other annular groove 131
, 17, and these communication passages 14 and 16 open on the lower surface of the valve body 2, and the communication passages 15 and 17 open on the upper surface of the valve body 2, respectively.

In this case, the communication passages 14 to 17 are connected to the respective valve holes 8 and 9.
In order to avoid interference with the passages 10, 11 and the annular grooves 12, 13 on the other side, in this embodiment, as shown in FIGS.
3 is expanded into an arc shape to form expanded portions 12a, 13a, while the other side of the annular groove 12 is conversely contracted into an arc shape to form a protruding portion 12b, and these expanded portions 12a, 13
a and the protrusion 12b to connect the communication path 14 to the annular groove 1.
2 toward the lower surface of the valve body 2, and
Similarly, the communicating passages 16 are bored from the expanded part 13a of the annular groove 13 toward the lower surface of the valve body 2, avoiding the annular groove 12, by the protruding part 12b. 9, and the communication passage 15 is arranged symmetrically on the left and right sides of the annular groove 12.
a to a desired position on the upper surface of the valve body 2 using a vertical hole and a horizontal hole while avoiding the annular groove 13, while the communication passage 17 is directly guided from the desired position on the upper surface of the valve body 2 to the annular groove 131. It's worn out.

Further, screw holes 18 and 19 for attaching the cover 3 and sub-plate 4 and a through hole 20 vertically passing through the valve body 2 are bored in the upper and lower surfaces of the valve body 2, respectively.

1 in the valve holes 8 and 9 of the valve body 2.
A central partition wall 23a into which a cylindrical spool 23, 24 having through holes 21, 22 on its sides is slidably inserted as shown in FIG.

24a with chambers 25, 26 and 27. on each side.
It is divided into 28 areas.

The spools 23 and 24 are normally kept in a neutral position with respect to the valve holes 8 and 9.

For this purpose, bushings 29, 30 are fitted into one end of the chambers 27, 28 in the valve holes 8, 9, and guides 31, 32 extending from the bushings are inserted into the spools 23, 24, and the guides 31, 32 extend into the spools 23, 24. Spring receivers 33° and 34 inserted into the proximal end portions of 31° and 32, and one flange at the distal end of 35.
The center springs 39 and 40 are interposed between the spring receivers 37 and 38 which are inserted while maintaining the locked state through the spring receivers 36 and 36, and these spring receivers 33 and 34 are connected to the spools 23 and 23.
The snap ring fitted on the 4th side is 41°421, and
Connect the lower end of the other spring receiver 37°38 to the spool 2.
3, 24 central partition walls 23a.

24a, this center spring 39
, 40 is used to normally maintain the spools 23, 24 in a neutral position with respect to the valve holes 8, 9.

In addition, a through hole 2 is bored through one side of the spools 23 and 24.
1, 22 are in all cases internal passages 43.44
This connects the chambers 25 and 26 side, and the spool 23
．． When 24 is in its neutral position, it is located between the annular grooves 12 and 13 so as not to communicate with them, and is closed by the side walls of the valve holes 8 and 9.

From this point, the through holes 21 and 22 are connected to the spools 23 and 24.
According to the sliding movement of the annular grooves 12 and 13, the chambers 25 and 26 are opened to either the annular groove 12 or 13 depending on the direction of movement.

The cover 3 that closes the upper part of the valve body 2 has a valve mounting seat 45 on its surface side, as shown in FIGS. 10 to 13.
The valve mounting seat 45 has a supply passage 46, a discharge passage 47, two pilot passages 48, 49, and a threaded hole 50 for mounting the valve, each of which is located in one part according to the standard. A mounting hole 51 is opened in alignment with each passage and a mounting hole of the solenoid valve, and a mounting hole 51 is opened in alignment with the threaded hole 18 and through hole 20 on the valve body 2 side (around the cover 3). , 52 is worn.

When the cover 3 is attached to the valve body 2, the supply passage 46, the discharge passage 47, and the two pilot passages 48, 49 are connected to the communication passages 15, 17 on the valve body 2 side and the two pilot passages 48, 49. The supply passage 46 is directed straight downward to the bottom surface so as to be connected to the passages io and 'ii, and the discharge passage 47 and the pilot passage 48.49 are connected to the passages io and 'ii.
The pilot passages 48 and 49 are guided to a predetermined position on the lower surface using vertical holes and horizontal holes, and detection orifices 53 and 54 are screwed into the lower openings of the pilot passages 48 and 49. Tampa orifice separated from 55.56
are each open at the bottom.

As a result, the cover 3 is inserted into the valve body 2 from its mounting hole 51.
It is fixed to the upper part of the valve body 2 by screwing the bolt 5 (see Fig. 2) into the screw hole 18 on the side, and in this state, the supply passage 46 on the cover 3 side connects to the communication passage 15 on the valve body 2 side. The discharge passage 47 is connected to the communication passage 17, and the pilot passage 48 is connected to the passage 10 through the detection orifice 53.
Furthermore, another pilot passage 49 also communicates with the passage 11 via the detection orifice 54, and the middle of these pilot passages 48, 49 communicates with the chambers 27° 2 of the valve holes 8, 9 through tamper orifices 55, 56.
It will be connected to the 8th side.

On the other hand, as shown in FIGS. 14 to 17, the sub-plate 4 attached to the lower part of the valve body 2 includes a joint portion 57 that connects to the valve body 21 and an attachment portion 58 to the outside. Two take-out ports 1-59 and 60 are arranged on the left and right sides passing through the top and bottom, a supply port 61 and a discharge port 62 are arranged symmetrically in the front and rear thereof, and the take-out ports 59 and 60 are arranged symmetrically in the front and rear. Pilot passages 63 and 64 are drilled halfway toward the joint 57, and mounting holes 65 and screws are drilled around these to match the screw holes 19 and through holes 20 on the valve body 2 side. It has a hole 66.

After fitting the lower orifices 67 and 68 (see Fig. 1) of the valve holes 8 and 9 in the valve body 2, bolts 6 (see Fig. 3) are inserted through the mounting holes 65 of the sub-plate 4 into the valve body. By screwing into the screw holes 19 of 2, the sub-plate 4 is fixed to the lower surface of the valve body 2, and at the same time, the extraction ports 59, 60 are connected to the respective orifices 67,
68 to the chambers 25, 2 of the valve holes 8, 9 in the valve body 2
On the 6 side, the pilot passages 63 and 64 coming out from the middle are connected to the through holes io and i1, and the supply port 61 is connected to the annular groove 12.
The discharge port 62 is further connected to the communication passage 14 which communicates with the annular groove 13, and the communication passage 161 which also communicates with the annular groove 13.

Note that the through holes 69 bored at one of the four corners of the mounting portion 58 indicate mounting holes to the outside.

As a result, the cover 3 and sub-plate 4 are attached to the upper and lower parts of the valve body 2 with bolts 5 and 6, and then these are passed through the respective through holes 20, mounting holes 52, and screw holes 66, and the bolts 7 (See Fig. 2), and then the supply port 61 on the sub-plate side connects from the communication passage 14 on the valve body 2 side to the supply passage 46 on the cover 3 side through the annular groove 12 and the communication passage 15. Similarly, the discharge port 62 is connected from the communication passage 16 to the discharge passage 47 on the cover 3 side via the annular groove 13 and the communication passage 17, while the subplate 4 side extraction port 59, 60
from chambers 25, 26 to internal passages 13, 44 and through holes 21.
, 22 to the annular grooves 12, 13, and furthermore, the pilot passages 48, 49 on the cover 3 side are connected from the passages 10, 11 of the valve body 2 to the pilot passages 63, 64 of the sub-plate 4. The extraction ports 59 and 601 are connected to each other.

Next, the valve assembly 70 used in combination with the control valve device 1 according to the present invention described above will be explained.
For this purpose, it is sufficient to simply use the ones that are already used as build-up type integrated valve units with their own sub-plates. Therefore, only representative ones will be explained here as examples. Make it.

That is, FIG. 18 shows an IJ-F valve for an extraction port, in which a valve body 711 is connected to each passage of a solenoid valve, including a supply hole 72, a discharge hole 73, and an extraction hole 74, 75,
and a mounting hole 76, and each of these extraction holes 74, 7
A relief valve 77 is incorporated between the valve body 81 and the discharge hole 73, respectively, and FIGS. On the other hand, there are supply holes 82, discharge holes 83, and extraction holes 84, 85 according to each passage on the solenoid valve side.
, and the mounting hole 86, and these extraction holes 84°8
Therefore, various valve assemblies 70 are prepared in advance using such means, and these are assembled into the control valve device according to the desired circuit module. After stacking one valve mounting seat 45 on the upper surface of the cover 3 in 1 and placing the solenoid valve 80 on top of it, connect the screw holes 50 and mounting holes 76, 78, and so on with one bolt (Fig. (not shown), they are fixed together as shown in FIG.

In this way, the supply port 61 on the sub-plate 4 side can be connected to a fluid pressure source such as a hydraulic pump, and the discharge port 62 can be connected to a reservoir side such as a tank. , 60 are connected to actuators such as hydraulic motors and hydraulic cylinders, respectively. Therefore, as long as the solenoid valve 80 is in the neutral position, the supply port 61 is normally connected to the valve body 2. At the annular groove 12 from the communication passage 14, the spool 231 is closed, and at the same time, from the annular groove 12 to the communication passage 15 and the supply passage 46 of the cover 3,
Since the solenoid valve name 0 is closed through the supply holes 72, 82-m- of each valve up assembly 70 stacked thereon, no flow occurs at all, and therefore the control valve device 1 It does not even operate.

However, from this state, the solenoid valve 80 is energized and, for example, the supply holes 72 and 8 in the valve assembly 70 are
2-m- is connected to the mounting holes 74, 84-- side, and the other outlet hole 75, 85-m- is connected to the discharge hole 73, 83-- side, first, the pressure fluid from the pressure fluid source is connected. However, the supply port 61 series passage 14-@-shaped groove 12 series passage 1
5 - Supply passage 46 - Supply hole 72, 82 of each valve assembly 70 - Solenoid valve 80 - Also outlet hole 74, 84 of each valve assembly 70 - Pilot passage 48 - Detection orifice 53 - Passage 10 - Pilot The flow flows to the actuator side through the passage 63 and the take-out port 59, and the flow rate is detected as a pilot flow by a detection orifice 53 installed halfway, and the pressure drop is expressed as a differential pressure before and after the flow rate. bring about

Then, the pressure on the inlet side of the detection orifice 53 is guided from the middle of the pilot passage 48 to the chamber 27 side via the damper orifice 55, and the pressure in the chamber 25 is reduced by the pressure drop of the pilot flow from the detection orifice 531. Since the pressure on the chamber 27 side becomes lower by the amount generated, the spool 23 receives a downward thrust due to the pressure difference between the chambers 25 and 27, and begins to move downward.

When the spool 23 begins to move downward, the through hole 21 gradually opens the annular groove 121.

Therefore, from the annular groove 12 to the through hole 2 of the spool 23,
A main flow of pressure fluid is generated through 1-internal passage 43-chamber 25-orifice 67 toward the take-out port 59 side, which merges with the pilot flow at the take-out port 59 and is sent to the actuator side 1.

On the other hand, the return fluid from the actuator is
From pilot passage 64 to passage 11 to detection orifice 5
4 - Pilot passage 49 - Take-out holes 75, 85 of each valve assembly 70 - Solenoid valve 80 - Discharge holes 73, 83 of each valve assembly 70 - m - Discharge passage 47 series passage 17 - Annular groove 13 series passage 16 - Returns to the reservoir side via the discharge port 62, and as in the case of the supply side, the flow rate is detected by the detection orifice 54 as a pilot flow, and the spool is connected to the differential pressure generated before and after the pilot flow. 24 upward one step, and while joining the pilot flow from the actuator through the take-out port 60 - orifice 68 - chamber 26 - internal passage 44 - through hole 22 - annular groove 13, the communication passage 16 and the discharge port 6
2 and back to the reservoir side.

In this way, when main flows occur on both the supply side and the discharge side, their flow rates are detected by the orifices 67 and 68, respectively, as in the case of each pilot flow, and the pressure is determined relative to the flow rate in the form of a differential pressure across the front and back. cause a drop.

Therefore, on the supply side, the pressure on the side of the chamber 25 increases due to the differential pressure 1 generated by the orifice 6γ, and the pressure on the spool 23 increases.
receives an upward thrust from this differential pressure, and the spool 23 comes to rest at a position where this upward thrust and the downward thrust from the pilot flow detection orifice 53 are balanced. As the opening area of the annular groove 13 of the through hole 22 in the spool 241 increases, the pressure in the chamber 26 and the take-out port 60 decreases. The pressure drop in the chamber 26 is greater than the pressure drop in the section 60, and therefore, this difference causes the spool 24 to have a lower thrust due to the pressure drop of the sensing orifice 54 in the pilot flow. It will come to rest at a position balanced with the upward thrust of 24.

The balancing condition for the spools 23, 24 is that the cross-sectional area of the spools 23, 24 is a1 center spring 39.4.
The set load of 0 is set to Kx1, and the pressure of the extraction port 60 is set to Po1.
Expressing the differential pressure due to the orifices 67 and 681 as △P1 and the differential pressure due to the detection orifices 53 and 541 as △P2 in a simplified formula, the supply side...△P2・a=K
x+△P1・a discharge side・・・・・・(Po−△P1)・
a=Kx+(Po-△P2)・a,A,,P2・a−K
x+ΔP1・a, both of which are expressed by the same equation.

In this equation, when comparing the set load Kx of the center spring 39.40 and the upward thrust ΔP1·a of the spools 23, 24 due to the differential pressure of the orifice 67.68,
If the former is negligibly smaller than the latter by 1, then the above equation can be rewritten as △P2 cow △P1, and therefore, the spool 23
The differential pressure caused by the detection orifice 53 and the differential pressure caused by the orifice 67 are also detected by the spool 24.
In other words, when the differential pressure by 1 and the differential pressure by the orifice 68 are equal to 1, in other words, the spools 23, 2
Assuming that the chambers 25°27 and 26.281 at both ends of the center spring 4 are at rest at a position where the pressures acting on them are equal, and the set load Kx of the center spring 39°40 has a certain value (however, It is assumed that the load change due to the constant is negligible), it can be rewritten using the simplified formula % formula %, and in this case, the detection orifice 53
Although the differential pressure due to the orifice 671 and the differential pressure due to the detection orifice 54 and the differential pressure due to the orifice 68 are not equal, the forces acting on the spools 23 and 24 are balanced at the point where the latter is smaller than the former by Tax. , these spools 23, 24 are stationary.

In addition, so far, in the solenoid valve 80, the supply holes 72, 82 of the valve assembly 70 are connected to one side of the outlet holes 74, 84, and the other outlet holes 75, 85 are connected to the exhaust hole 7.
3.83-1-+ Case 1 when connected 1 Finally, we have described the control operation of the control valve device 1 according to the present invention, but when the solenoid valve 80 is switched in the opposite direction and the communication relationship is reversed 1 Since the valve-resistant device 1 is configured symmetrically, it is easy to understand that the control operation is exactly the same as in the previous case, only that the moving directions of the spools 23 and 24 are reversed. I can do it.

In addition to the above, the differential pressure △P2 generated by the detection orifices 53 and 54 and the differential pressure △P1 generated by the orifice 67°681 are inversely proportional to the square of the area of each orifice, and the flow rate of the fluid flowing through the orifice is Regardless of the pressure that the , orifice 67
, 68 is given as 81. Therefore, the detection orifice 53 and the orifice 67, and the detection orifice 54 and the orifice 68
It can be seen that by appropriately selecting the area ratio between 2 and 2, it is possible to control the large volume main flow Ql with the small volume pilot flow Q2 at a constant ratio.

For this reason, when the valve assembly 70 is stacked between the control valve device 1 according to the present invention and the solenoid valve 80, for example, the IJ IJ-F valve for the outlet port as shown in FIG. Figures 19 and 20
If a flow control valve for the take-out port as shown in the figure is used, the switching operation of the solenoid valve 80 causes the fluid pressure source to flow from the supply port 61 of the control valve device 1 to the continuous passage 14 - the annular groove 12 - the continuous passage 15 - Supply passage 46 - supply holes 72, 82 of valve assembly 70 - solenoid valve 80 - also outlet hole 74.8 of valve assembly 70
4 or 75, 85 is adjusted to a predetermined flow rate by the flow control valve 87 of the valve assembly 70, and then detected from the pilot passage 48 or 49 of the control valve device 1. Orifice 53 or 54 - Passage 10 or 11 - Pilot passage 63 or 64 - Output port 59 or 6
Since it passes through 0 and is sent to the actuation side, at that time,
A differential pressure corresponding to the pilot flow rate controlled by the flow control valve 87 of the valve assembly 70 is generated before and after the detection orifice 53 or 54, and therefore, the spool 23 or 24 has a constant ratio to this pilot flow rate. As a result, the control valve device 1 according to the present invention operates as a flow control valve, and also switches the solenoid valve 80 to the neutral position. If a load of more than a predetermined value is applied to the actuator from the locked state, the load pressure will be applied to the pilot passage 63- from one of the take-out ports, for example, the take-out port 59 side.
Passage 10 - Detection orifice 53 - Pilot passage 48 - IJ
- act on the valve 77 to push open the IJ valve 77 and release the pressure fluid from the discharge holes 73, 83 to the discharge holes 83, 73 on the opposite side (the left and right discharge holes in the valve assembly 70). Holes 73, 73 and discharge hole 83.
83 are kept in communication with each other through a discharge passage within the solenoid valve 80 by mounting a solenoid valve 80 on the valve assembly 70.

) - IJ on the opposite side IJ - I assembled in valve 77
J IJ- check valve 78 which also serves as main valve - extraction hole 75,
85 - Pilot passage 49 - Detection orifice 54 - Passage 11 - Pilot passage 64 Flows to the opposite side of the actuator through the take-out port 60, and this pressure fluid flow is used as a pilot flow to generate a pressure difference before and after the detection orifice 53.54. , one spool 23 is switched upward and the other spool 24 is switched downward, so that the annular groove 1
While supplying pressure fluid to the negative pressure side of the actuator from 2, the fluid on the pressure side is returned from the annular groove 13 to the reservoir side, and in this way, the control valve device 1 according to the present invention can work as an overload relief valve, In the same manner, valve assemblies 7 with various functions such as a throttle valve, sequence valve, or load check valve will be described below.
(selectively stacking 0), the control valve device 1
It is possible to provide large-capacity functions for each type of device.

In the control valve device 1 described above, by removing the cover 3 and sub-plate 4 from the valve body 2 and thereby replacing the detection orifices 53, 54 and orifices 67, 68, the degree of amplification of the main flow relative to the pilot flow can be changed. Alternatively, the opening area of the detection orifices 53, 54 may be made variable by turning an adjustment screw 53a from the outside, as shown in FIG. 1A1, for example.

In this way, the ability to arbitrarily select the opening areas of the detection orifices 53, 54 and 67, 68 is not a problem when considered as a simple module, but it is very important when trying to perform program control. That's true.

In addition, this control valve device 1) has chamber 27.2.
8 are connected to the respective pilot passages 48 and 491 through damper orifices 55 and 56, which are intended to alleviate the shock that occurs when the spools 23 and 24 are switched.

The above has only described the single control valve device 1, but as shown in FIGS. 22 and 23, for example, a separate lower part with only the extraction port 1-59, 60 bored outside the sub-plate 4 is provided. A cover 3a is prepared in advance, and a connecting hole 97 is formed to pass through the valve body 2 laterally, as shown by chain lines in FIGS. 4, 8, and 9, respectively. Through-holes 98, 99 leading the annular groove 12, 13 towards the outer side of the valve body 2 are bored therein, so that the control valve device 11 with the sub-plate 4 has 1 instead of this sub-plate 4. By applying the control valve device 1a with the cover 3a attached, keeping the respective through holes 98 and 99 in a communicating state, and integrally connecting them with the connecting bolt 100 passed through the connecting hole 97, 2. It is also possible to construct a series or more control valve arrangements.

In addition, the control valve device described so far can be used as is if a main relief valve or unload valve is incorporated in the fluid pressure source, for example, a hydraulic pump. However, if the hydraulic pump does not have these functions, a control valve device for main relief and unloading is required.

As this control valve device 101, for example, those shown in FIGS. 24 to 27 may be used.

That is, like the side valve device 1, this uses a valve body 102, a cover 103, and a sub-plate 104, and integrally connects these with poles 105, 106 and a through bolt 107, In addition, a valve hole 108 and a passage 110 penetrating through the valve body 1021 in the axial direction, and an annular groove 113 located midway through the valve hole 108 are bored, respectively, and a side surface opposite to the inside of the valve hole 108 is formed. A spool 123 having a through hole 121 is slidably inserted into the spool 123 and held at the lowermost position of the normal valve hole 108 by a spring 139 interposed between the spool 123 and the inner wall of the cover 103. V'''・(In state 1, spool 123
The communication between the through hole 121 on the side and the annular groove 113 is cut off, and the through hole 121 is rubbed once so that the annular groove 113 side opens by one degree as the spool 123 moves upward.

The annular groove 113 is connected to the lower surface of the annular groove 113 via the communicating passage 116 bored through the valve body 1021 and the discharge port 162 of the sub-plate 104 on the one hand, and through the communicating passage 117 similarly bored through the valve body 102 and the cover on the other hand. 10
One predetermined position on the upper surface of the valve mounting seat 145 was opened through the discharge passage 147 bored through 31 holes, and the lower chamber 125 partitioned by the spool 123 was bored from the orifice 167 into the sub-plate 104. Through the supply port 161 to the lower surface thereof, and at the same time from the middle of the supply port 161 to the pilot passage 163 and the passage 110 on the valve body 102 side, and from the supply passage 146 bored in the cover 103 through the single detection orifice 153. A predetermined position on the valve mounting seat 145 is opened, and the middle of the supply passage 146 is communicated with the upper chamber 126 partitioned by the spool 123 via the damper orifice 155.

When using the control valve device 1, the valve mounting seat 145 and the supply port IJ
The valve assemblies 70, which are IJ-) valves, are stacked, one treinoid valve 80 is placed on top of the valve assemblies 70, and these are integrally assembled with bolts, and the supply port 161 is connected to one fluid pressure source, and the discharge port 162 This is done by communicating one each on the reservoir side.

Therefore, according to this device, by switching the solenoid valve 80 and connecting the supply hole and the discharge hole of the valve assembly 70, the pressure fluid from the fluid pressure source is first flowed as a pilot flow from the supply port 161 to the pilot flow. Passage 163 - Passage 110 - Detection orifice 153 -
Supply passage 146 Supply hole of half assembly 70 - Threinoid valve 80 - Discharge hole of valve assembly 70 - Discharge passage 147 Series passage 117 - Annular groove 113 Communication passage 11
6 - The flow from the reservoir side through the discharge port 162 generates a differential pressure across the detection orifice 153 to switch the spool 123 upward, and the through hole 121 is connected to the annular groove 11.
3 to provide a main flow of pressure fluid from the fluid pressure source to the reservoir side 1 through the supply port 161 - orifice 167 - chamber 125 internal passage 143 - through hole 121 - annular groove 113 communication hole 116 - discharge port 162. , 1 Therefore, it can be used as an unloading valve,
Also, during operation, the solenoid valve 80 cuts off communication between the supply hole and the discharge hole in the valve assembly 701, so that when the pressure of the fluid pressure source abnormally increases, it is sensed and the valve assembly is activated. The relief valve 70 opens, and as before, a pilot flow is created from the supply port 161 through the detection orifice 153 and the relief valve of the valve assembly 70 toward the reservoir, thereby switching the spool 123 upward. This provides a main flow directly from the supply port 161 to the reservoir side through the through hole 121, and in this way it can also be used as a main relief valve.

Note that in such an unload/main IJ valve 1, there is no need to control the flow rate, so the orifice 167 may be made as large as possible or may be omitted.

The above has described the control valve device 101 for the unload/main IJ/F valve when used as a single unit. Like, exhaust port 162
In addition, by using a cover 103a that opens the supply port 161 to the inner surface that is the joint surface with the valve body 102,
In addition, as shown by the chain lines in FIG. 24, the connecting hole 197 that passes through the valve body 102 in the lateral direction, the supply port 161 on the cover 103a side, and the annular groove 113 are guided through the outer surface of the valve body 102, respectively. The through holes 9B, 19B and the through holes 99, 199 are bored in the control valve device 101a for unloading and main relief, and the through holes 9B, 19B and the through holes 99, 199 are connected to the general control valve device 1. These are connected so as to maintain communication with each other, and then they are integrally connected with bolts 100, and then the second
As shown in Figure 9 and Figure 30, both are integrated 1.
It is also possible to use this combination.

In addition, the upper i1i city IJffl valve devices 101, 101a have a valve hole 10 in a valve body 102, as shown in FIGS. 31 to 33 and FIGS. 34 to 36, for example.
When another annular groove 113a is bored in the part 8,
The opening of the through hole 121 facing the annular groove 1131 is first on the spool 123 side, and the annular groove 113a side 1 is
This annular groove 113 is provided with a through hole 121a that opens
a to the outer surface of the valve body 1021 through the carryover port N62a, and to the cover 10 from the communication passage 117a to the pilot passage 148 on the other hand.
When the solenoid valve 80 connects the supply passage 146 to the pilot passage 148 by guiding the valve mounting seat 145 to a predetermined position 1 on the upper surface of the valve mounting seat 145, first, the fluid pressure source is connected to the supply port 161 - the pilot passage 163 -. Passage 11
- Detection orifice 153 - Supply passage 146 - Supply hole of valve assembly 70 Solenoid valve 80 - Take-out hole of valve assembly 70 - Pilot passage 148 Continuous passage 117a Carryover port 1 via annular groove 113a
62a side, and by guiding this pilot flow through another circuit 1 from the carryover port N62a, it is connected before and after the detection orifice 153.
A corresponding differential pressure is generated, and accordingly, the spool 123 is moved upward to the corresponding position to open its through hole 121a toward the annular groove 113a, and this time, from the supply port 161 to the through hole 121a of the spool 123 and the annular groove 113a. The carryover port N
62a to the next circuit, this 1
Therefore, the control valve device 101.degree. 101a can also be provided with a carryover function.

Up to now, the control valve device of the present invention has been explained by taking the sub-plate type as an example, but for example, the third control valve device has been explained.
As seen in FIG. 7 and FIG. 38, the supply port 161 of the cover 103a in the control valve device 101af
is also opened on its lower surface, and this and the control valve device 1a are connected to the respective through holes 98, 198 and through holes 99, 1.
In order to maintain communication between the two control valve devices 101a, the through hole 99 is opened externally from the outer surface of the control valve device 1a at the end, and a carryover port 162a in the control valve device 101a is also provided. It is also possible to form a bracket-type multiple control valve device by opening on the outer surface thereof and integrally connecting these with the bracket 96 with a connecting bolt 100.

Above, we have explained the present invention based on the basic usage example 1, but it can also be applied to other fluid pressure operating systems by partially changing it or using a different assembly. obtain.

That is, FIGS. 39 and 40 show the solenoid valve 80.
An example is shown in which a conventionally known multiple control valve or near control valve is used instead.

For example, as shown in FIG.
Through-holes 92, 93 bored in communication with the extraction holes γ4, 84--75.85--, and mounting holes similarly drilled in combination with those screw holes 50 or mounting holes 76.86--1. As shown in FIG.
48, or supply hole 7 in valve assembly 70
2, 82, a through hole 92a bored in communication with the discharge holes 73, 83--1 and the transaction holes 75, 85--1.

93a, 94a, and a mounting hole 95 drilled in conjunction with their screw holes 150 or mounting holes 76.86--1.
using a connecting plate 90a having a
On the valve mounting seat 45 in a, or on the top of the valve assembly 70 stacked thereon, there is also a control valve device 101 as well as the other connecting plate 90a.
The through holes 92, 93, and 92a are mounted on the valve mounting seat 145 at 101a or the top of the valve assembly 70 stacked thereon.

The control valve device 1, 1a according to the present invention is achieved by connecting the multiplex control valve or the near control valve 93a with piping and using the through hole 94a as a carryover port for the pilot.

This example shows that 101.101a can also be implemented by multiple control valves or near control valves.

In particular, in this case, these control valve devices 1. la.

101.101a, the detection orifices 53, 54, and 153 can be opened by opening the detection orifices 53, 54, and 153, since the linear control valve itself can control the flow rate of the working fluid by its operation amount 1, as is well known. The flow rate of the pilot flow is controlled according to the operating amount of the near control valve while maintaining the same temperature, and accordingly, the detection orifices 53, 5
By controlling the differential pressure that occurs before and after 4,153, it becomes possible to freely select the flow rate of the main flow.

Further, the control valve device 1, 1a according to the present invention 1 has two passages 48a from the middle of the pilot passage as its upper cover, as shown in FIG. 43, for example.

48a' and passages 49b and 49b', and by combining this with a known servo solenoid valve 80a whose opening degree can be controlled by a current amount of 1, a control valve device is constructed. 1, 1a through the supply hole 72°82-m of the valve assembly 70 to the port P of the solenoid valve 80a, for example, a switching operation to the left of the solenoid valve 80a) Accordingly, from port A to passage 83a - variable detection orifice portion 53' - port A' - pipe 89a - passage 4
8a'-passage 10-pilot passage 63 to the extraction port 59 side, and at this time, the differential pressure generated from the front and rear of the variable orifice portion 53' is on the one hand taken out from the passage 79a and the valve assembly 70 from port A. Hole 74
, 84-- and the chamber 27 side through the passage 48a, and the other side from the take-out port 59 through the orifice 67 to the chamber 25 side, thereby causing the spool
While moving the fluid downward, a main flow is provided from the annular groove 12 through the through hole 21 toward the take-out port 59 side, and at the same time, the return fluid from the take-out port 60 is first made into a pilot flow, and then the fluid flows from the pilot passage 64 to the passage. 11-Aisle 49
b'-pipe 89b-port B'-variable orifice portion 54'-passage 88b-port B-port R-discharge hole 73° of valve assembly 70 83--discharge passage 47-
It is returned to the reservoir side via the annular groove 13, and at this time, the differential pressure 1 generated between the front and rear of the variable orifice portion 54' is accompanied by the spool 24 being moved upward in the same manner as before, , provides a main flow from the extraction port 60 through the through hole 22 and the annular groove 13 and returns directly to the reservoir z41J, and in this way, the amount of current applied to the solenoid valve 80a increases depending on its variable orifice portion 53'.
, 54', while controlling the opening degree of the main flow with respect to the pilot flow, it is also possible to arbitrarily change the flow rate amplification rate of the main flow and use this as a servo valve.

In this case, the detection orifices 53 and 54 interposed in the portions 1 of the passages 48a' and 49b' may be omitted.
When an IJ valve or the like is installed, one detection orifice for the lowest sensitivity may be required.

As described above, according to the present invention, small-capacity pilot valves and various solenoid valves having various functions can be stacked on top of the single unit as the valve assembly 70, or the topmost one can be connected. By stacking the holding plates 90 and connecting them to various control valves, each function, that is, flow rate control, pressure side leg or direction control, can be achieved.
Not only can it be used as a large-capacity commercial valve device that has multiple functions, but it is also necessary to connect them in combination to make it suitable for use as a power unit. This makes it possible to make this type of control valve device versatile and easy to standardize1, making it possible to make hydraulic equipment smaller, lighter, and simpler; Inside, the main flow rate is constantly detected by the orifice, and the differential pressure across the main orifice that occurs according to the main flow rate is fed back to the spool, so the pressure is amplified to a certain extent relative to the pilot flow rate. The main flow rate can be given, and in this case, the spool always maintains an opening degree that fits the main flow rate due to orifice 1, so it maintains extremely good responsiveness as a control valve device. This is possible.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the control valve device according to the present invention 1, which is in the form of a sub-plate, and FIG. 1A is a
FIG. 3 is a partial diagram showing an example of a case where the detection orifice is rubbed variablely from the outside. Figure 2 is a plan view of the control valve device, Figure 3 is a bottom view of the same, Figure 4 is a longitudinal sectional front view showing only the valve body, Figure 5 is a top view of the same, and Figure 6 is a bottom view of the same. Figure 7 is
The longitudinal cross-sectional side view taken from the line ■-■ in FIG. 4, FIGS. 8 and 9 are
10 is a vertical sectional front view of the cover, 11 is a plan view of the same as above, 12 is a bottom view of the cover,
Figure 13 is a longitudinal side view taken from the line X--X in Figure 10, Figure 14 is a longitudinal front view of the sub-plate,
Figure 5 is a plan view of the same as above, Figure 16 is a bottom view of the same, Figure 17 is a vertical side view taken from the FIG. 21 is a diagram showing an example of a valve assembly used in combination with the control valve device of the invention, and FIG. Figure 22 is a side view showing an example of the use of two control valve devices, Figure 23 is a top bottom view of the same, and Figure 24 is a main plate in the form of a sub-plate. 25 is a plan view of the same, FIG. 26 is a bottom view thereof, and FIG. 27 is XX in FIG. 24. ■-Longitudinal side view taken from line XXVII, No. 2
Fig. 8 is a longitudinal sectional front view of the lower cover used in place of the sub-plate, and Fig. 29 is a diagram showing the case where the control valve device of Fig. 1 is used in combination with a control valve device for the main relief and unload valve. A side view showing an example, FIG. 30 is a bottom view of the same as above,
FIG. 31 is a longitudinal sectional front view showing an example of a control valve device for the main relief/unload valve shown in FIG. 24 that also has a carryover function, FIG. 32 is a plan view of the same, and FIG. is xxxu-xxxu in Figure 31 1
34, a cross-sectional plan view taken from the line, shows the control valve device 1 for the main IJ IJ-fu and unload valve used in combination with the control valve device shown in FIG. 35 and 36 are longitudinal sectional front views showing an example of the case where the
-xxxv line and XXXVI-XXXVI line; Fig. 37 is a side view showing an example of use of the control valve device according to the present invention as a bracket type; Fig. 38
Figure 39 is a bottom view of the same as above; Figure 39 is a side view showing an example of use when controlling the control valve device according to the present invention 1 using a multi-type control valve or a near control valve instead of a solenoid valve; The figure is a plan view of the same as above, Figures 41 and 42 are plan views showing an example of a connecting plate used in that case, and Figure 43 is a diagram showing a case in which the control valve device of the present invention is used as a servo valve. FIG. 1.1a, 101.101a... Control valve device. 23.24,123...Spool, 45,145
...... Valve mounting seat, 46,146... Supply passage, 47°147... Discharge passage, 48,148
...Pilot passage, 48a, 48a'...
・Aisle, 49...Pilot passage, 49b, 4
9b'...Aisle, 53°53a, 153...
-...Detection orifice, 54...Detection orifice, 59...Takeout port, 60...Takeout port, 61, 161...Supply port, 62°162. ...Discharge port, 162a...
Carryover port, 67... Orifice, 68
... Orifice, 98,198 ... Through hole, 99,199 ... Through hole.

Claims (1)

[Scope of Claims] 1. Two parallel valve holes are bored in the valve body, and the peripheral surface of these two valve holes is opened to form two upper and lower annular grooves. on the one hand to a supply port and a discharge port opened on the outer surface of the valve body, and on the other hand to a pilot supply passage and a discharge passage opened at predetermined positions of the valve mounting seat, which are also formed on the outer surface of the valve body, Further, a spool is slidably inserted into each of the two valve holes to divide the inside of each valve hole into two upper and lower chambers, and one space between each spool and the valve body is located between the two chambers. A center spring is interposed to hold each spool at an intermediate position within the valve hole and to keep the spools in a state of blocking communication between the two annular grooves and the valve hole. According to the movement in the vertical direction from 1 to 1, a through hole is selectively formed in the two annular grooves to communicate with the upper and lower chambers in the valve hole on each side, and further, a through hole is formed in each of the valve bodies. There are two take-out ports that lead to the lower chambers in each of the valve holes through the orifices, and two take-out ports that branch out from a portion of the take-out ports that is located on the exit side of the orifice to a predetermined position of the valve mounting seat. A detection orifice is interposed in the middle of each pilot passage, and a portion of each pilot passage between the external opening and the detection orifice is inserted into the valve hole on each side. A control valve device consisting of one upper chamber communicating with the other. 2 Two parallel valve holes are bored in one pair of valve bodies, and two valve holes are opened at the sides of these two valve holes to form two upper and lower annular grooves. On the one hand, these annular grooves are used as a supply port and a discharge port opened on the outer periphery of the valve body, and on the other hand, as a pilot supply passage and a discharge passage opened at predetermined positions of the valve mounting seat, which are also formed on the outer surface of the valve body. A slidable spool is inserted into each of the two valve holes to divide the inside of each valve hole into two upper and lower chambers, and one spool is inserted between each spool and the valve body. At this position, a center spring is interposed to hold both the spools at intermediate positions within the valve hole and to keep these spools from communicating with the two annular grooves and the valve hole.
In this case, a through hole is bored through which the two annular grooves are selectively communicated with the lower chamber in the valve hole on each side according to the movement in the vertical direction from the intermediate position. , the valve body 1
This includes two take-out ports each communicating with a lower chamber in each of the valve holes through an orifice, and a portion of each take-out port located on the exit side of the orifice branching off from a portion of the take-out port that leads to the valve. Two pilot passages that open at a predetermined position of the mounting seat are formed, and a detection orifice is interposed in the middle of each of these pilot passages, and the portion between the external opening and the detection orifice in each pilot passage is formed on each side. The valve hole is connected to the upper chamber in the valve hole, and is configured in this manner.
In order to enable the valve devices to be used in conjunction with each other, the side-tilt valve device is provided with two through holes that open the two annular grooves to the outer surface of the valve body.