JPH0426894Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a two-pressure output valve that outputs two high and low fluid pressures from one valve.

[Prior art] The inventors of the present invention first determined the height of two valves from one valve.
A two-pressure output valve that outputs two fluid pressures was developed in 1983.
-166589 (see Utility Model Application Publication No. 1-72612).

The previously proposed two-pressure output valve has the advantage of being able to output two high and low fluid pressures from one valve, but because it lacks consideration for pressure setting operations, the two fluid pressures are controlled by separate handles. In addition, there are cases where the fluid pressure must be set in a predetermined order, making the pressure setting operation cumbersome.

[Problem to be solved by the invention] The problem to be solved by the invention is to provide a two-pressure output valve that allows easy pressure setting operations and allows two high and low fluid pressures to be set with one handle regardless of the order. It is about providing.

[Means for Solving the Problems] In order to solve the above problems, the two-pressure output valve of the present invention is provided in a passage that switches the pressure fluid output port A to the supply port P and the discharge port R for communication. Supply valve seats 20, 73 and discharge valve seats 31, 74
and supply valve bodies 27, 75 that open and close these valve seats.
and a feedback chamber 2 which includes discharge valve bodies 32 and 76 and a pressure regulating section 12 that sets the fluid pressure of the output port A, and to which the fluid of the output port is fed back.
The valve bodies 27, 75 and 32, 76 are driven depending on the magnitude of the acting force of the fluid pressures 7, 83 and the output from the pressure regulating section 12, and the valve seats 20, 73, 3 are driven.
In the valve that opens and closes 1 and 74, the pressure regulating section 1
2 is a pressure regulating piston 25 that is slidably provided on the side of the feedback chambers 27 and 83 in the main body 24 of the pressure regulating part 12 and outputs a force opposing the acting force of the feedback fluid pressure; a switching piston 26 slidably provided on the opposite side of the feedback chambers 27, 83 of the pressure regulating piston 25; and a pressure regulating chamber 28 between the pistons 25, 26 partitioned by these pistons 25, 26. , a pressure chamber 29 on the opposite side of the pressure regulation chamber 25 divided by the switching piston 26, a pressure setting spring 30 contracted in the pressure regulation chamber 25, and a high pressure setting that regulates the positions of both sliding ends of the switching piston 26. Member 58 and low pressure setting member 3
7, the pressure fluid is supplied to and discharged from the pressure chamber 29, and the switching piston 26 is connected to the high pressure setting section 58 and the low pressure setting section 3.
7, a dummy cap 34 which is mounted on the main body 24 and rotates to move the low pressure setting member 37 forward and backward with respect to the main body 24; A handle 35 that rotates to move the high pressure setting member 58 forward and backward relative to the main body 24, and a low pressure lock that is provided between the dummy cap 34 and the main body 24 and locks and unlocks the low pressure setting member 37 by sliding in the axial direction. The high pressure locking portion 41, 51 is provided between the handle 35 and the dummy cap 34 and locks and unlocks the high pressure setting member 58 by sliding in the axial direction.

[Operation] When the low pressure lock section is slid to release the lock of the low pressure setting member by the low pressure lock section and the handle is rotated, the dummy cap, which rotates together with the handle due to the lock of the high pressure lock section, Low pressure is set by moving the low pressure setting member back and forth,
After setting the pressure, the low pressure setting member is locked by the low pressure lock section. In this case, the high pressure setting member is locked by the high pressure lock portion and rotates together with the handle and the dummy cap, so the set pressure does not change.

On the other hand, when the high pressure lock section is slid to release the lock of the high pressure setting section by the high pressure lock section and the handle is rotated, the dummy cap is locked by the low pressure lock section and does not rotate, so the high pressure setting member moves forward and backward. A high pressure is set, and after the pressure is set, the high pressure setting member is locked by the high pressure locking portion. in this case,
Since the dummy cap does not rotate, the low pressure setting does not change.

Therefore, with one handle, two heights can be adjusted.
The two pressures can be set in any order.

When pressure fluid is not supplied to the pressure chamber, the switching piston contacts the low pressure setting member with the biasing force of the pressure setting spring, and the pressure from the pressure regulating section is determined by the small biasing force of the pressure setting spring at the contact position of the switching piston. The output sets the fluid pressure at the output port to a low pressure.

When pressure fluid is supplied to the pressure chamber from the supply/discharge valve, the switching piston comes into contact with the high pressure setting member, and the output from the pressure regulating section is determined by the large setting biasing force of the pressure setting spring at the contact position of the switching piston. The fluid pressure at the output port is set to high pressure.

Therefore, by supplying and discharging pressure fluid to the pressure chamber, two high and low fluid pressures can be output from one valve, and these fluid pressures can be set at two high and low pressure settings with one handle. A desired pressure can be set by moving the member back and forth to adjust the biasing force of the pressure setting spring.

[Embodiment] Figures 1 and 2 show a first embodiment of the present invention in which a two-pressure output valve is a direct-acting type. It is equipped with a fluid supply/discharge valve 13 and is mounted on a manifold block 14. The valve body 16 of the main valve 11 includes a supply passage 17 of the manifold block 14 and an output passage 1 of the manifold block 14.
8 and discharge passage 19, a pressure fluid supply port P, an output port A, a discharge port R, and a supply valve seat 2 in a passage that communicates ports P and A.
0 and opens and closes the valve seat 20.
is biased by a return spring 22 in the direction of closing the valve seat.

The main body 24 of the pressure regulating section 12 has a feedback chamber 27 communicating with the output port A on the main valve 11 side and a discharge port between the pistons 25 and 26 by a pressure regulating piston 25 and a switching piston 26 that slide inside. R
A pressure regulating chamber 28 communicating with the pressure chamber 28 and a pressure chamber 2 outside the pressure regulating chamber 28
A pressure setting spring 30 is compressed between the pistons 25 and 26, and a discharge valve seat 31 in a passage that communicates the feedback chamber 27 and the pressure adjustment chamber 28 is opened in the pressure adjustment piston 25. Supply valve body 2
1 and is opposed to a discharge valve body 32 formed integrally with the valve body 1 .

A dummy cap 34 and a handle 35 are successively attached to the bonnet 24a of the main body 24, a low pressure lock ring 36 is loosely fitted to the lower outer periphery, a low pressure setting member 37 is screwed to the top wall, and a low pressure setting member 37 is screwed to the top wall. A circumferential groove 38 is formed in the vicinity, and a low pressure lock portion 39 is formed at the connection portion with the flange 24b (see FIG. 2).

The dummy cap 34 has a protrusion 45 having a high-pressure lock part 41 on the outer periphery of the top wall, an engaging part 42 on the end face on the opening side, notches 43 in the middle part of the peripheral wall, and a locking groove 44 on the peripheral wall on the opening side. , the notch 43 and the protrusion 45
An annular locking part 46 is provided in between, and a cylinder part 47 having a hexagonal outer shape protrudes inward from the center of the top wall, and the cylinder part 47 is connected to the concave part 37 of the same shape in the low pressure setting member 37.
Pin 4 loosely inserted into a and inserted into the notches 43, 43
8, 48 are fitted into the circumferential groove 38, so that they can only rotate relative to the bonnet 24a.

The handle 35 has a shaft portion 50 at the center of the top wall.
is equipped with a high-pressure lock part 51 on the inside of the top wall and protrusions 52, 52 on the inner wall of the lower end, and when attached to the dummy cap 34 by loosely inserting it into the recess 34a of the dummy cap 34 of the shaft part 50, the protrusions 52, 52 are engaged. Stop part 4
6, the high-pressure lock parts 51 and 41 are locked, and when the dummy cap 34 is pulled out slightly to release the lock between the protrusions 52 and 52 and the lock part 46, the high-pressure lock parts 41 and 51 are unlocked. be done.

The low pressure locking ring 36 is attached to the dummy cap 34.
protrusions 54, 54 that lock in the locking grooves 44 of
6, when the protrusions 54, 54 are engaged with the locking groove 44, the engaging parts 42 and 55 are engaged and the low pressure locking parts 39 and 56 are locked, and the protrusions 54, 54 and the locking groove 44 are pulled out slightly. When the lock is released, the lock of the low pressure lock parts 39 and 56 is released, but
The engaging portions 42 and 55 are engaged.

The high pressure setting member 58 is connected to the switching piston 26 at one end.
The switching piston 2 is provided with a stopper 59 that comes into contact with
6 and the low pressure setting member 37 is screwed onto the cylindrical portion 47 of the dummy cap 34, and its flat end portion is inserted into a hole of the same shape in the shaft portion 50 of the handle 35.

On the other hand, in the supply/discharge valve 13, the input port 61 and the output port 62 communicate with each other due to the excitation of the solenoid, and the discharge port 6
3 is closed, and when the solenoid is de-energized, the output port 62 and the discharge port 63 communicate with each other, and the input port 61 is closed.
The input port 61 communicates with the supply port P, the output port 62 communicates with the pressure chamber 29, and the discharge port 63 communicates with the discharge port R, respectively.

Reference numeral 65 in FIG. 1 is a pressure gauge that displays the fluid pressure of the output port A.

Next, the operation for setting the low pressure and high pressure of the two-pressure output valve will be described.

FIG. 1 shows that the dummy cap 34 is locked to the bonnet 24a via the low pressure locking ring 36 by the low pressure locking parts 39 and 56 and the engaging parts 42 and 55, and the handle 35 is locked by the high pressure locking parts 41 and 51. The dummy cap 34 is shown in a locked state.

Pull out the low pressure lock ring 36 slightly and remove the protrusion 5.
4, 54 and the locking groove 44, the low pressure locking portions 39 and 56 are unlocked.
When the handle 35 is rotated, the dummy cap 34
The low pressure setting member 37 rotates together with the low pressure setting member 37 and is screwed onto the bonnet 24a.
moves back and forth in the pressure chamber 29 to set a low pressure, and after setting the low pressure, the low pressure locking ring 36 is pushed in to lock the low pressure locking parts 39 and 56. In this case, the high pressure setting member 58 rotates together with the handle 35 and the dummy cap 34, so even if the high pressure is previously set by the operation described below, the set pressure will not change.

When the handle 35 is slightly pulled out with the low pressure lock parts 39 and 56 locked, the engagement between the protrusions 52 and 52 and the locking part 46 and the lock between the high pressure lock parts 41 and 51 are released, but the dummy cap 34 Engagement of engagement parts 42 and 55 and low pressure locking parts 39 and 5
It is locked to the bonnet 24a by a lock No. 6.

When the handle 35 is rotated, the high pressure setting member 58, which rotates together with the handle 35, advances and retreats by screwing into the stationary dummy cap 34 to set the high pressure.After setting, the handle 35 is pushed in to lock the high pressure. 41 and 51 are locked. In this case, the dummy cap 34 and the low pressure setting member 37 are connected to the low pressure lock part 3.
Since the low pressure setting member 37 is locked by 9 and 56 and the engaging parts 42 and 55 and does not rotate, both high and low pressure can be set with one handle 35, and there are no restrictions on the order of setting. Never.

The pressure chamber 2 is energized by the solenoid of the supply/discharge valve 13.
When pressurized air is supplied to the pressure chamber 9, the switching piston 26 comes into contact with the stopper 59 of the high pressure setting member 58, and the fluid pressure at the output port A is set to a high pressure determined by the large biasing force of the pressure setting spring 30. When the pressurized air is discharged, the switching piston 26 comes into contact with the low pressure setting member 37, and the fluid pressure at the output port A is set to a low pressure determined by the small biasing force of the pressure setting spring 30.

FIG. 3 shows a second embodiment of the present invention in which a two-pressure output valve is a pilot-driven type, and the valve body 72 of the main valve 71 of the second embodiment has a pressure fluid supply port P, an output port A, The valve seat 7 is provided with a supply valve seat 73 and a discharge valve seat 74 that are formed to face a discharge port R and a through hole that communicates these ports.
Supply valve seat 75 and discharge valve seat 76 that open and close 3, 74
slides airtight within a valve chamber formed in a retainer 77 that closes both ends of the through hole and a drive portion 78, and is biased in the closing direction of the valve seat by return springs 79, 79.

A valve rod 81 that drives the valve bodies 75 and 76 has a driving piston 82 , and the driving portion 78 has a driving piston 82 .
2 into a feedback chamber 83 on the main valve side and a pilot chamber 84 on the opposite side, the feedback chamber 83 communicates with the output port A, and the valve body 75,
76 is associated to close valve seats 73 and 74 together when drive piston 82 is in the neutral position shown.

In the pilot section 86 of the second embodiment, the input port 87 of the valve section is connected to the supply port P of the main valve 71, and the output port 88 is connected to the supply port P of the main valve 71.
The valve is substantially the same as the direct-acting type valve of the first embodiment except that the valve is connected directly to the pilot chamber 84 and the discharge port 89 is directly connected to the outside.
The same reference numerals as those in the figures are given and detailed explanations are omitted.

The high pressure and low pressure setting operations in the second embodiment are the same as in the first embodiment, so detailed explanations will be omitted.

[Effect of the invention] The two-pressure output valve of the present invention locks or releases the low pressure lock between the dummy cap and the pressure regulating part, and locks or releases the high pressure lock between the handle and the dummy cap. Move the high and low pressure setting members forward and backward separately using the handle.
Since the low-pressure and high-pressure fluid pressures can be set to desired pressures regardless of the order, the operability of pressure setting of the two-pressure output valve can be greatly improved.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view of the main part of the first embodiment of the present invention, Fig. 2 is a cutaway exploded perspective view of the main part of the pressure regulating section, and Fig. 3
The figure is a longitudinal sectional front view of main parts of a second embodiment of the present invention. 11, 71... Main valve, 12... Pressure regulating section, 13...
...Supply/discharge valve, 20,73...Supply valve seat, 21,75
... Supply valve body, 25 ... Pressure regulating piston, 26 ...
Switching piston, 27, 83... Feedback chamber, 28... Pressure regulation chamber, 29... Pressure chamber, 30...
Pressure setting spring, 31, 74...Discharge valve seat, 32,
76...Discharge valve body, 34...Dummy cap, 3
5... Handle, 37... Low pressure setting member, 39,
56...Low pressure lock part, 41, 51...High pressure lock part, 58...High pressure setting member, P...Supply port, A...Output port, R...Discharge port.

Claims (1)

[Claims for Utility Model Registration] Supply valve seats 20, 73 and discharge valve seats 31, 74 provided in a passage that switches and communicates a pressure fluid output port A with a supply port P and a discharge port R;
A feedback chamber 27 is provided with supply valve seats 27, 75 and discharge valve bodies 32, 76 that open and close these valve seats, and a pressure regulating section 12 that sets the fluid pressure of the output port A, and to which the fluid of the output port is fed back. ，
The valve bodies 27, 75 and 3 may be
2, 76 to drive the valve seats 20, 73 and 31, 7.
In the valve that opens and closes 4, the pressure regulating section 12 generates a counterforce against the acting force of the feedback fluid pressure, which is slidably provided on the side of the feedback chambers 27, 83 in the main body 24 of the pressure regulating section 12. A pressure regulating piston 25 for output, a switching piston 26 slidably provided on the side opposite to the feedback chambers 27, 83 of the pressure regulating piston 25 in the main body 24, and a switching piston 26 partitioned by these pistons 25, 26. A pressure regulation chamber 28 between both pistons 25 and 26 and a pressure regulation chamber 2 partitioned by a switching piston 26
5, a pressure setting spring 30 contracted in the pressure regulating chamber 25, and the switching piston 2.
6, a high pressure setting member 58 and a low pressure setting member 37 that regulate the positions of both sliding ends of the switching piston 26, and a high pressure setting member 58 that supplies and discharges pressure fluid to and from the pressure chamber 29 to control the switching piston 26.
and a supply/discharge valve 13 that is moved in a direction to come into contact with the low pressure setting part 37; a dummy cap 34 that is mounted on the main body 24 and moves the low pressure setting member 37 forward and backward with respect to the main body 24 by rotation; The high pressure setting member 58 is
a handle 35 for advancing and retreating from the main body 24;
Low pressure lock parts 39, 56 are provided between the dummy cap 34 and the main body 24 and lock and unlock the low pressure setting member 37 by sliding in the axial direction.
and high pressure lock parts 41 and 5 provided between the handle 35 and the dummy cap 34 and locking and unlocking the high pressure setting member 58 by sliding in the axial direction.
A two-pressure output valve comprising: 1.