JPS5943282A - Spool-valve - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to spool control valves and more specifically to four-way spool valves controlled by solenoid-operated bar valves. A spool valve is a valve member in the form of a spool, i.e., a spigot connected by a rod, configured to slide axially through a first elongated hole formed in the valve body. There are many boats on the side wall of the long hole, and each of these boats has a
Typically, it is connected to a fluid source and low pressure area and to the specific type of equipment used.

The spool valve member has two terminal positions i1° in the elongated hole.
1 and controls communication between the boards 1 and 1. In one end position of the spool valve valve, the pressure side boat is connected to one of the user side boats 1- and is connected to the other of the user side boats or the user side boats 1-. . At the other end of the device, the boat or discharge ball on the user side connected to the pressure side HI', °-1 is connected to the first,
- Also, the device side boat connected to the discharge boat is now connected to the pressure side boat.

Several types of pilot operated spool valves are known. Some types of pilot-operated spools have three-way pilot valves or three-way pilot valves or three-way control valves.
U pressure fluid - or rJl output 14E force is applied to Lj: on the - side of the vertical piston.
11j-CI7).

The piston is pressurized. In the past, the spool valve member moved in one direction, while the spool valve member ζJ'JI
When the valve is in the open state, a return link force is applied to return the valve bracket to its original position.

Another type of pilot-operated spool fin (with two pistons on the spool): "lt2.1"1
High-pressure fluid acts on the piston, which is made by humans and has a small diameter. moves in one direction.Because the same pressure acts on both pistons (if -, diameter C'), the force acting on Ip ('l?) acts on the smaller piston. J
It is - because it exceeds j. When the piston with the larger diameter ('1) is in the ejection state, the pressure acting on the piston with the smaller diameter returns to its original position.
Return to ¥shi.

Another type of spool valve is 4JJ Pyrono)・-
It has two pistons with the same dimensions as the valve. Set the pilot valve to -H screw I/N to IJII pressure, set the other piston to the #jt' extended state, and move the spool valve part 4'A in one direction. Alternatively, the other piston is pressurized and the force (7) is placed in the ejected state (1) to move the spool valve member down in the other direction. This type of spool valve has been used many times in history (d1 piston is 1-X), and this is one! The side of the bubbles in the middle is crossed +, addition to 7),
If the state or ill is issued, R417 has not been completed.

These known ties! “The spool-valve is each
, ``C'I'F ax and blade point has been set. - Mino 1 small I Jl valve and various fist springs 3 (Φ The spool valve used is 4111:ji!j) μm is coming.L, 751 L\Litan Suburi,
I am afraid that I will run out of work due to fatigue or fatigue.
This binding causes the spool-valve to become inoperable. In addition, a constant force is applied by the return spring), so at very low LEh, the spool warp cannot be applied to the valve.

＼If you use a 9-piece piston with a different J method, the return
It is no longer necessary to use a spring.
It costs a lot of money to produce. If you choose a larger diameter valve, the overall size of the spool valve will be larger, so there is a difference. 1 piston with large diameter
In order to make the pistons smaller than the previous one, two pistons of the same diameter arranged in a skewer are used instead of a large piston. However, (2c),,) 11
``According to the 6th generation's ability, it was expensive to prepare a piston with an additional IJ1.

4-jj control + ff1l It is possible to use a valve, use a return spring, and use two pistons of the same method. 1
-2 or L3 Bairono [・Since the valve and its associated circuit are double-tube, manufacturing costs are high.

The first aspect of the present invention is to use two bistosys of the same J method.
A Nisbourg valve incorporating the fc valve member, which does not require a return spring, and which is constructed to be operable by a square pylon l-φ valve. The spool valve of the present invention therefore has all the advantages and disadvantages mentioned above with respect to known spool valves.

The feature of the spool Hibiki pulp according to the present invention is that the surface of the piston facing in a specific direction is always applied JL:, m=l-ru, both of which are facing in the same direction. 21 is always in the discharge state, and using the control and mountain I valves, both piston discs are -) JC...
) and then pressurize the spool valve part (+) and -JJ.
Move the piston to the other direction, or move both pistons to the full output state of the external force la1. l
I).

It is another object of the invention to provide a directional seal on each piston and always in operation.
This is to provide a four-way grooved valve with a structure 31 to prevent noise.

Other objects and features of the present invention are that the following questions (・ζunderstand/
Let's go.

Here, j'i"("JFigurejm A @ 1id (L Suggau4)l 明Qi1゛f!Jn KExplain.

The spool valve selected to illustrate the structure of the present invention comprises a valve body 10, in which an elongated hole 11 is formed.

The - end of the elongated hole 11 is closed by an end tab v-) 12.
1, and the other end is closed by an end brake 113, and the end brakes 1, 12 and 13 are fixed on the valve body 10 using appropriate fixing means (1' shown) to prevent fluid from leaking. In this embodiment, the valve body 10υ7 has two ports 14, 15, 16, 17, 18 and 19 formed in the side wall of the elongated hole 11. (J, -1'mu-j or six annular seals 20, 21 and 22 molded from plastic)
is protruded in the direction of the cliff diameter JJ' in the elongated hole 11, and one seal is completely positioned between two adjacent t'-1-, or two seals cross over the boat 17. 3, seals 20, 21 and 22i-1 placed in the lateral position
The assembly consisting of the sole and the spacer is held apart by a spacer (not shown), and the assembly consisting of the sole and the spacer is recessed in the inner wall of the elongated hole 11 and accommodated in two annular recesses. Elongated hole 1 with reference ring 23
Jl is held in place within 1.

The bow h18 installed on the valve body 10 is r+-q
The boats 14, 17, and 19 are adapted to connect to a source of pressurized fluid, such as compressed air, while the boats 14, 17, and 19 are connected to a low pressure region such as the atmosphere, where the subject of the controlled flow is air, or a stored fluid. is connected to a reservoir in which the liquid is a liquid. Bows 1-15 and 716 are connected to working equipment controlled by main spool fist valves on either side of a piston (not shown) housed in the cylinder.

The Sfur Pal '7' WM material 26, which is arranged to slide in the elongated hole 11 in the axial direction, is equipped with two pistons 27 and 28 of the same diameter, and the pistons 27 and 28 are connected to a rod. 29. Pistons 27 and 28 are slidably inserted into slot 11 - and rod 2
9 is slidably seated in the annular seals 20, 21 and 22. Note that rod 29 is sized to slide through annular seals 20, 21, and 22 without leaking fluid. The rod 29 has two regions 30 of reduced diameter spaced radially inwardly from the annular seals 20, 21, and 22. Valve member 26 is movable between two end positions shown in FIGS. 1 and 2. In the terminal position shown in FIG.
to °C working equipment side port.

-1 and 16, and the discharge boat 14 communicates with the work equipment side boat 15 through the elongated hole 11.

When the valve member 26 is moved to the position shown in FIG.
Communicate with.

The piston 27 cooperates with the end grate 12 to define a chamber 33 within the elongated hole 11, and the same piston 27 also cooperates with the annular seal 2CI to define an annular chamber 34 within the elongated hole 11. There is.

Similarly, the piston 28 cooperates with the end plate 13 to define the chamber 35, and the same piston 28
cooperates with the annular seal 22 to define an annular chamber 36. Valve body l.

A passageway 37 extending longitudinally within is formed into a short branch passageway 38.
It is always in communication with the pressure side boat 18 through the elongated hole 11. The passageway 37 is connected at one end with a passageway 39 formed in the end plate 13, and the passageway 39 is located between the passageway 37 and the elongated hole 35. therefore,
The pressure side boat 18 always communicates with the chamber 35 through the elongated hole 11 and the passages 38, 37, and 39 at all positions where the valve iη≦reduction 26.

The annular chamber 34 is in constant communication with a low pressure region (atmosphere or reservoir) through the vent boat 19 at all positions of the valve member 26. Therefore, piston 28
A high pressure always acts on one surface of the piston 27, that is, the right side in the drawing, and a low pressure always acts on the surface of the piston 27 facing in the same direction as the surface of the piston 28. Please understand that there are. A longitudinally extending passageway 40 extends from the annular passageway 36 to a passageway 41 formed in the end plate 12 , which extends into the chamber 33 , thereby allowing the valve member 26 chamber 33 and annular passage 36 at all positions of
There is always communication between them.

The movement of the spool valve bulb 26 is operated by a solenoid.Pilot φ valve 44 F Yo! l) The three-way pilot valve 44 is mounted on the spool valve body 10 in a fluid-tight manner. A hole 45 having five boats 46, 47 and 49 is formed in the body of the pilot valve 44. Among the six boats, boat 46 is the passage 37,!
Two lines are connected, so the pressure side bow +-1
It is always in communication with 8. The boat 47 is in constant communication with the low pressure side area (population or reservoir). The boat 48 cooperates with a passage 49 formed in the valve body 10 and a passage 50 formed in the end brake +-12 to communicate with the gap between the hole 45 and the chamber 33. It is functioning.

A pylon to valve armature or pylon 1 valve armature 53 is mounted so as to be axially movable in the hole 45, and the movement of said armature or armature 53 is controlled by the solenoid 5.
4. When the solenoid 54 is de-energized (see FIG. 1), the armature 53 is held in its lowest position by the action of a spring (not shown) (C), and in this position the boat 46 is closed and the boat is closed. ) 47 is open.

As a result, chamber 33 is in fluid communication with the outside through passageways 50, 49, and 48, hole 45, and vent boat 47. When the solenoid 54 is energized, the armature 53 moves to its highest position (see Figure 2).
, in this position, the hoard 47 is closed and the L5 boat 46 is open. As a result, the chamber 33 is pressurized from the pressure side boat 18 through two passages 38 and 37 in the elongated hole 11, through the boat 46, the hole 45, the boat 48, and the passages 49 and 50.

When the solenoid 54 is deenergized, a spring acts to return the armature 53 to the lowered position (see FIG. 1).

The operation of the spool valve according to the present invention will be explained as follows.

When solenoid 54 is deenergized, a low pressure is applied to chamber 3.
3 and 36. This is because the chamber 36 is always in communication with the chamber 33 and the vent-boat 4 of the pilot valve 44 is connected to the chamber 33 or the pilot valve 44.
This is because it communicates with 7. The same low pressure always prevails in the annular chamber 34, while the high pressure coming from the boat 18 always prevails in the annular chamber 35.
It's all over the place. 1 straddles, bis l-n 2
The lower pressures acting on both sides of the piston 28 are balanced, but the IE t acting on both back-to-back sides of the piston 28
Since y is unbalanced, a force will be exerted that moves the valve member 26 to the left to the distal position shown in FIG. When the solenoid 54 is energized, high pressure fluid flows into the chambers 33 and 36 because the chicken bars 33 and 36 are connected to the pressure supply through the Byron-valve-boat 46. A low pressure continues to prevail in the annular chamber 34, and a high pressure continues to prevail in the chamber 35. The high pressures acting on both sides of piston 28 are balanced, but the pressures acting on back-to-back sides of piston 27 are not balanced, so that the high pressures acting on both sides of piston 28 are not balanced, so that the pressures acting on both sides of piston 28 are not balanced, so that the high pressures acting on both sides of piston 28 are balanced, and the pressures acting on both back-to-back sides of piston 27 do not balance, so A force appears that moves the valve oil 26 toward the valve.

The pistons 27 and 28 are provided with annular seals 55 and 56, respectively, which are fitted between the outer circumferential surface of the piston and the inner circumferential surface of the elongated hole 11, which are capable of sliding on each other. Sleeping. The seals 55 and 56 are tip-shaped seals having a U-shaped cross section L2. 55 stickers,
The open side of the U-shape faces towards the chamber 35, while the seal 56 is shaped like a U-shape i.
The opening side of the +< shape is placed so as to face the force of the chicken bar 35. Since the seals 55 and 56 each have the shape described above, they function only in one direction.

That is, the seal 55 prevents fluid from leaking from the chamber 33 toward the annular chamber 34, but does not conversely prevent fluid from leaking from the annular chamber 34 toward the chamber 33. On the other hand, the seal 56
It prevents leakage of fluid toward the annular chamber 36, but does not prevent fluid leakage from the annular chamber 36 toward the chamber 35. When the spool valve is in the position shown in FIG. 1, the seal 56 is activated to prevent fluid leakage;
It was easy to understand that the seal 56 was in an inoperative state in this case, and that no differential pressure would occur after nfJ across the seal 56.
Let's fall. On the other hand, when the spool valve is in the position shown at 8 in FIG. 2, seal 56 is inactive, but seal 55 is activated. Therefore, since each seal is in active MCC for only a portion of the time that the spool valve is in operation, the service life of the seal can be significantly extended over a valve construction in which the seal is in constant actuation. The reason for this is that a seal that is constantly in operation deforms and wears out, and thus loses its sealing ability more quickly than a seal that is intermittently in operation.

Although in the above embodiment the spool valve member 26 has been described as consisting of pistons 27 and 28 connected together by a rod 29, the two pistons and rods each have a diameter of 1". :lte14 (-゛atsu-C is also good. 逍' :tlIn the scope of claims (・1ゝゝゝ? --,11,II ) river; 1iBI L”su)
> 27 The upper part of the 28th line extends between 27 and 28. fi: monode7) even): < 1. It may have a physical (C-tied "C" or "σ") C.

The present invention has been described with reference to preferred embodiments;
Add a little bit of history - 4: Yes. L7/9-and-
(, (C-determined or 'h-determined implementation i% t\!Ukome-determined 7,
~ It's easy to understand `` [5 Let's take care of it.

4. Figure 7) Simplified iii 7:,: Explanation Figure 1 shows the 1jη+1 of the Sublu valve related to this investigation.
12. of·! +1 Nen G-n2 Illustrated kI Susatsuno facing i
This figure shows the state in which the valve member occupies the position of force among both end positions on the right side.Second
The diagram is shown in FIG.
i Figure C, /< )L part +'(/J'ff'l
Jgl! 'i+ tree,'f1. H position ii'i
) indicates the state where t is valued at 111; -, 1
−.

Explanation of sign υ 10 Valve body, 11 Oblong hole, 12, 13 Gu1
Part 14 Bree-1・, ] 4, Ko 5, 16, 17,
18. 19 Boat, 20, 2] 1, 22 Annular sole, 23・Sna,・F・risig, 26・Spool Italian valve part (), 27, 28 Bi
Me, ]・n・, 29・VI
-1, 30・Antitussive with small direct fl, 33.35 Chi1>Bar, 34.36 Circular Chi)・Number-837...
Long passage, 38 Short branch passage, 39 passage, 4-0
,,, ,! t Koi passage, 41 passage, 44 square bi■7 noto-barzo, 45 hole, 46, 47, 48
Bau+-149,50...Aisle, 53...Pilot...
Valve part 4'a・54・Solenoid, 55;56・
Circular,,-,)1 Attorney's Attorney 1. Narumi Yokomizo

Claims (1)

[Scope of Claims] (1) It has the following components: an elongated hole and a plurality of boats formed in the valve body along the long axis, one of the plurality of boats. a valve body configured to be a pressure side boat connected to a source of pressurized fluid; Surido r]] Noh,
a spool valve member having a first piston at one end and a second piston at the other end; and applying a constant high fluid pressure to one side of the first piston. means; a second piston facing in the same direction as said one surface of the first piston;
A constant low fluid pressure is applied to one side of the piston of i=J'
, a means for IJll and a spool at one end position.
simultaneously applying a high fluid IE force to the other of each of the first and second pistons to move the valve member, or each of the first and second pistons to move the spool valve assembly to the other end position; A spool valve comprising control means for simultaneously applying a low fluid pressure to the other side of the spool valve. (2) Always apply high fluid pressure to the first piston.
a chamber adjacent to the respective side of each piston, characterized in that the means for applying the pressure side boat and the chamber adjacent to one side of the first piston are provided with a passageway for constant communication between the pressure side boat and the chamber adjacent to one side of the first piston; A spool valve according to claim 1. (5) the control means is adapted to control the fluid flow of l'JJ between the pressure side boat and the chamber adjacent to the other side of the second piston; 3. A spool valve according to claim 2, characterized in that the spool valve is provided with a passage which provides constant communication between the chamber adjacent to the surface. (4) The control means communicates with the low jI-, area 1
・As mentioned above, how many boats are connected to 1.
and a fifth boat that communicates with the second piston 1) adjacent to the other iYi, i of the second piston, and a control valve that communicates with the sixth boat and the low pressure region. Interchange L between the lower boat and the pressure side boat 1.
7. The spool valve according to claim 6, wherein said control valve is operated to communicate with the spool valve I. (5) It is confirmed that the control valve is a control valve with an armature r- that responds to the solenoid's I stop.
4. The spool valve according to claim 4, wherein a't is the specified range. (6) The spool valve according to claim 3J↓'1, wherein the passage is provided within the valve body. (7) Feature 1 characterized in that the first and second pistons are made in the same J method. 'l'Itf'?
A spool valve according to item 1 of the requested scope. (8) An annular seal is fitted between each piston and the inner wall of the elongated hole through which the piston moves, and the annular seal is inserted into the piston from the chamber adjacent to the outer surface in the longitudinal direction of the piston. Noto? It is a one-way sole that prevents the flow of fluid toward the inner surface facing the horn;
The force surface of the first piston is the longitudinal outer surface of the first piston, and the force surface of the second piston is the longitudinal inner surface of the second piston. ! 1
．． Characteristics of 'l' 1. 1. A spool pipe valve according to claim 1.