JP3475378B2 - Separation flow valve - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic circuit or a pneumatic circuit in which a fluid flowing from one collecting port is split into a plurality of dividing ports, while a fluid flowing from the dividing port is collected into a collecting port. The present invention relates to a branching / collecting valve capable of collecting a flow.

[0002]

2. Description of the Related Art Conventionally, for example, in a hydraulic circuit, oil is diverted from one pipe to a plurality of pipes, or
It was necessary to collect a plurality of pipes into a single pipe. Therefore, for example, as shown in FIG. 10, when the oil is split from one pipe body 6 into the two pipe bodies 7a and 7b, the pipe joint 5 may be used. However, according to such a pipe joint 5, the pressure of the one pipe body 7a or 7b becomes high, and the flow may be biased.

For this reason, in the case where the flow rate is biased to only one of the split ports, in order to quickly recover the flow rates of both of the split ports to be approximately the same, the branching and collecting valve 10 as shown in FIGS. 11 and 12 is used. Has been devised.

This branching / collecting valve 10 has one collecting port 1
2 and two split ports 14a and 14b are provided, and the oil flowing from the collecting port 12 is divided into two split ports 14a.
And 14b, while two split ports 14
It is a branching / collecting valve for collecting the oil flowing from a and 14b to the collecting port 12, and each split port 14a is provided by a spool 18 provided in the hollow portion 16 between the collecting port 12 and the two split ports 14a and 14b. 14b is a branching / collecting valve with a pressure compensation function capable of controlling the flow rates so that the flow rate ratios of 14 and 14b become substantially constant.

According to such a branching / collecting valve 10, when the pressure of one of the dividing ports 14a and 14b is increased in comparison with the pressure of the other when dividing or collecting the oil. , The spool 18 is slid so that the hole 26a or 26b is squeezed, so that the split port 14
The hydraulic pressures of a and 14b can be kept the same. Therefore, the flow rates of the split ports 14a and 14b can always be kept equal and the hydraulic circuit can operate normally.

Further, according to the flow dividing / collecting valve 10, when the oil is divided from the collecting port 12 into the two dividing ports 14a and 14b, the pressure of the oil flowing from the collecting port 12 causes two sliding members to flow. 20a and 20b are maximally separated, and the oil is divided from the dividing ports 14a and 14b to the collecting port 1
In the case of converging to two, two sliding members 20a and 2a
0b comes closest to the maximum. Therefore, it can be used as a flow control valve with pressure compensation in a form corresponding to each of the splitting and the collecting.

[0007]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
When the oil is split from the collecting port 12 to the split ports 14a and 14b by 0, as shown in FIG. 13, when the spool 18 is biased toward the sliding member 20b side, the recess 28b is closed and the oil is split into ports. It will not flow until 14b. In such a case, the oil gradually escapes from the slight clearance between the sliding member 20b and the main body 15, and the spool 18 gradually slides toward the sliding member 20a. The spool 18 gradually slides toward the sliding member 20a and then returns to a neutral position as shown in FIG. 11 and becomes stable. In this way, since only a small amount of oil escapes from the slight clearance between the sliding member 20b and the main body 15,
The hydraulic equipment connected to the pipe body 13b could not operate immediately.

Therefore, the present inventor has arrived at the present invention as a result of intensive research to solve such problems.

[0009]

The gist of the branching-and-collecting valve of the present invention is that it has at least one collecting port and a plurality of dividing ports, and the fluid flowing from the collecting port is divided into the plurality of dividing ports. A diversion / collection valve that diverts the fluid that has flowed in from the plurality of split ports to the collection port while diverting the flow to the port, and a throttle unit corresponding to each split port between the collection port and the plurality of split ports. Is provided, and the flow rate can be controlled so that the pressure drop in the plurality of throttle portions is kept substantially constant and the flow rate ratio of each divided port is substantially constant, in the case of closing the throttle portion, the fluid is A hole is provided for extracting from the collecting port to the dividing port or from the dividing port to the collecting port.

For example, in the hydraulic circuit, when the oil is divided by such a branching / collecting valve, the oil first flows from the pipe body connected to the collecting port side into the collecting port, and flows to one throttle portion. And oil flowing to the other throttle. The oil that has flowed to one of the throttles drops in pressure and then flows to one of the split ports. On the other hand, the oil that has flowed to the other throttle portion flows to the other split port after the pressure has dropped. In this way, the oil that has flowed in from the collecting port is split into the two split ports and flows into the two pipes connected to the split ports.

Here, in such a branching-and-collecting valve of the present invention, oil is drained from the collecting port to the dividing port or from the dividing port to the collecting port through the drain hole even when only one throttle portion is closed. Since oil is drained through the drain hole, oil flows through the pipe connected to this split port,
The actuator connected to the tube operates quickly. Further, even when one of the throttles is closed, the flow rate is maintained, and the flow rates of both split ports can be quickly returned so as to be the same.

Further, the gist of the branching / collecting valve of the present invention is that in the branching / collecting valve of the present invention, a direction in which the plurality of throttle portions are provided and the flow of the fluid in the collecting port or the dividing port is blocked. A spool capable of squeezing the squeezed portion by sliding is provided, and at the time of the diverting, as the pressure of one split port increases compared to the pressure of the other split port, it corresponds to the other split port. On the other hand, while narrowing the throttle portion, at the time of collecting the flow, the throttle portion corresponding to one of the split ports is throttled as the pressure of one of the split ports increases as compared with the pressure of the other split port.

In such a branching-and-collecting valve of the present invention, when the spool is biased to one side and only one throttle portion is closed in dividing the oil from the collecting port to the dividing port, the oil flows from the drain hole to the dividing port. Be pulled out. Since oil is drained through the drain hole, oil flows through the pipe connected to the split port, and the actuator connected to the pipe operates quickly without waiting for the spool to return to the neutral state. Further, the spool quickly returns to the neutral position. Since the spool quickly returns to the neutral position, the flow rates of the two split ports are kept the same. In addition,
Even when the spool is biased to one side when collecting the oil from the split port to the collecting port, the spool that is not at the target stop position is operated to the target stop position while the oil is drained from the drain hole. Further, the spool can be quickly returned to the neutral position. After the spool is quickly returned to the neutral position in this way, normal flow rate adjusting operation is performed. The normal flow rate adjusting operation will be described below.

In such a branching / collecting valve, normally, the two throttles have the same throttling degree and the same pressure drop, so that the oil flowing from the collecting port is equally split into the two dividing ports. To be At this time, since the differential pressure between the collecting port and one of the split ports is the same as the differential pressure between the collecting port and the other split port, the two split ports have the same hydraulic pressure.

However, for example, the pressure of one of the split ports becomes higher than that of the other split port due to the influence of the hydraulic equipment connected to the downstream side of the tubular body on the side of the one split port, etc. The pressure drop may be reduced and the flow rate at one split port may be reduced. In this case, the spool slides as the pressure in one split port increases as compared with the pressure in the other split port, and the throttle portion corresponding to the other split port is throttled. As the throttle portion corresponding to the other split port is throttled, the pressure of the other split port increases and the pressure drop decreases. The throttle part corresponding to the other split port is 2
The pressures in the two split ports are throttled until they are the same, the pressure drops in the two throttles are the same, and the flow rates in the two split ports are kept the same. The pressure drop referred to here is
It is the pressure drop due to the throttle portion and means the differential pressure between the collecting port and the dividing port.

Next, when the oil is collected by such a branching / collecting valve, the oil first flows into the one dividing port from the pipe body connected to the one dividing port and is connected to the other dividing port. Oil flows from the rotating pipe to the other split port. The oil that has flowed into one of the divided ports flows into the collecting port after the pressure is reduced by the throttle portion corresponding to the one of the divided ports. On the other hand, the oil that has flown into the other split port flows into the collecting port after the pressure drops due to the throttle portion corresponding to the other split port. In this way, the oil that has flowed in from the two split ports is collected in the collecting port and flows into the pipe body connected to the collecting port.

Here, in this branching / collecting valve, when the flow rate is controlled so that the flow rate of one of the divided ports and the flow rate of the other divided port are kept the same, normally, the throttles in the two throttle parts are used. Are the same and the pressure drops are the same, so the flow rates of the two split ports are the same. At this time, the differential pressure between the one divided port and the collecting port is the same as the differential pressure between the other divided port and the collecting port, so that the two divided ports have the same pressure.

However, for example, the pressure of one of the split ports becomes higher than that of the other split port due to the influence of hydraulic equipment connected to the downstream side of the pipe body on the one split port side, etc. The pressure drop may increase and the flow rate at one split port may increase. In this case, the spool slides as the pressure in one split port increases as compared with the pressure in the other split port, and the throttle portion corresponding to the one split port is throttled. As the throttle portion corresponding to one of the split ports is throttled, the pressure drop decreases. The throttle portion corresponding to one split port is throttled until the same pressure drop as the throttle portion corresponding to the other split port is achieved, and the flow rates of the two split ports are kept the same.

In this way, when the oil is split from the collecting port to the two dividing ports or when the oil is collected from the dividing port to the collecting port, the flow rates of the two dividing ports are kept equal, The flow rates of the two pipes connected to the split port are kept equal. The invention according to the present application is not limited to the one in which the branching valve of the type for controlling the flow rate so as to keep the flow rate of the one split port and the flow rate of the other split port the same is provided with the vent hole. Also included is a type of branching / collecting valve that has a vent hole so as to control the flow rate of one split port and the flow rate of the other split port to be 1: 2, 1: 2.5 or 1: 3. .

Further, the gist of the branching / collecting valve of the present invention is that, in the branching / collecting valve of the present invention, the spool is separable or approachable in the sliding direction, and each has the throttle portion. It is configured to include a pair of sliding members. Here, the spool referred to here only needs to be configured to include a pair of sliding members each having a narrowed portion, and includes a spool used by being combined with other parts. . Further, the pair of sliding members is not limited to having the same shape, and the number thereof is not limited, and refers to members that can slide and be separated or approach each other.

In a hydraulic circuit, for example, such a branching / collecting valve of the present invention, when oil is split from the collecting port to a pair of dividing ports, slides in a pair by the pressure of the oil flowing from the collecting port. When the members are maximally separated from each other and the oil is collected from the split port to the collecting port, the pair of sliding members are maximally brought close to each other. In such a state, by sliding the spool, the throttle portion is throttled so that the pressures of the pair of divided ports are kept the same.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a branching and collecting valve according to the present invention will be described in detail with reference to the drawings.

In FIGS. 1, 2 and 3, reference numeral 34 is a flow dividing valve according to the present invention. This diversion valve 34 is 1
Number of collection ports 12 and two division ports 14a and 1
4b, which divides the oil flowing from the collecting port 12 into the two dividing ports 14a and 14b, while collecting the oil flowing from the two dividing ports 14a and 14b into the collecting port 12. And the collective port 12
16 between the two split ports 14a and 14b
Each split port 14a by the spool 18 provided in the
14b is a branching / collecting valve with a pressure compensation function capable of controlling the flow rates so that the flow rate ratios of 14 and 14b become substantially constant. In addition, in the branching / collecting valve 34 of the present invention, the hollow chamber 22 of the main body 15 is
A drain hole 36a that allows oil to be drained from a to the split port 14a and a drain hole 36b that allows oil to drain from the hollow chamber 22b to the split port 14b are provided.

In the hollow portion 16, the spool 18 has the collecting port 12 or the dividing ports 14a and 14b.
It is composed of two sliding members 20a and 20b that slide in the direction perpendicular to the oil flow direction and are separated or approaching each other. The sliding member 20a has a hollow chamber 22a, and a hole 24a and a hole (throttle portion) 26 communicating with the hollow chamber 22a.
a is provided, the oil flowing in from the collecting port 12 enters the hollow chamber 22a through the hole 24a, and exits from the hollow chamber 22a through the hole 26a to the recess 28a.
It is configured to flow up to 4a and flow out to the outside.
Further, the sliding member 20b is also configured similarly to the sliding member 20a. It should be noted that the sliding member 20a and 20b are arranged so that they are stable at appropriate positions where oil can flow.
a spring 30a that connects a to the inner wall of the hollow portion 16, and a spring 30b that connects the sliding member 20b to the inner wall of the hollow portion 16,
A spring 32 that connects the sliding member 20a and the sliding member 20b.
Is provided.

Such a diverter valve 34 is usually shown in FIG.
As in the case of the conventional branching / collecting valve 10 shown in FIG. 1, the operation of dividing or collecting the oil is performed. That is, when the oil is split, as shown in FIG. 1, first, the oil flows from the pipe body 11 connected to the collecting port 12 side into the collecting port 12, and enters the hollow chamber 22a from the hole 24a. The oil enters the hollow chamber 22b from 24b. Here, the two sliding members 20a and 20b are in a state where they are separated from each other by a force applied by the pressure of the oil that has entered from the collecting port 12. The oil that has entered the hollow chamber 22a through the hole 24a is
Through the recess 28a or through the vent 36a to the split port 14a. On the other hand, from the hole 24b to the hollow chamber 22
The oil that has entered b flows from the hole 26b through the recess 28b or through the drain hole 36b to the split port 14b. In this way, the oil that has flowed in from the collecting port 12 is split into the split ports 14a and 14b, and flows into the pipes 13a and 13b, respectively.

Here, in the flow dividing valve 34, the hole 26a is formed.
Or 26b is narrowed or opened to the maximum depending on the positional relationship with the recess 28a or 28b, but normally the positions of the sliding member 20a and the sliding member 20b are symmetrical, so the holes 26a and 26b are not. Have the same aperture. Therefore, normally, the oil that has flowed in from the collecting port 12 is evenly divided into the split ports 14a and 14b. When the oil flowing from the collecting port 12 is equally divided into the dividing ports 14a and 14b, the differential pressure between the collecting port 12 and the dividing port 14a is
Since it is the same as the differential pressure with b, the split ports 14a and 14
b is the same pressure.

However, for example, due to the influence of hydraulic equipment connected to the downstream side of the pipe 13b, the split port 14
The pressure of b is higher than that of the split port 14a, the pressure drop to the collecting port 12 is small, and the split port 1
The flow rate of 4b may decrease. In this case, the pressure in the hollow chamber 22b increases as compared with the pressure in the hollow chamber 22a, so that the entire spool 18 begins to slide toward the hollow chamber 22a. As the entire spool 18 slides toward the hollow chamber 22a, the hole 26a is disengaged from the recess 28a and the hole 26a is gradually closed. As the hole 26a is gradually closed, the pressure in the hollow chamber 22a increases and the entire spool 18 slides toward the hollow chamber 22a until the pressure in the hollow chamber 22a becomes the same as the pressure in the hollow chamber 22b. Becomes Since the pressure in the hollow chamber 22a becomes the same as the pressure in the hollow chamber 22b, the pressure drops in the holes 26a and 26b become the same, and
The flow rates of 6a and 26b are kept the same. Holes 26a and 26
By keeping the flow rate of b the same, the split port 14
The flow rates of a and 14b remain the same. Even when the pressure of the split port 14a becomes higher than that of the split port 14b, the split ports 14a and
The flow rate of 4b remains the same.

Next, when the oil is to be collected by such a branching / collecting valve 34, as shown in FIG.
Oil flows from a into the split port 14a, and oil flows from the pipe body 13b into the split port 14b. The oil that has flowed into the split port 14a is discharged from the hole 26a or the discharge hole 36a.
Enters the hollow chamber 22a, flows out from the hole 24a, and flows to the collecting port 12. On the other hand, the oil that has flowed into the split port 14b is discharged from the hole 26b or the vent hole 36a into the hollow chamber 22b.
Enters, flows out from the hole 24b, and flows to the collecting port 12. Here, the two sliding members 20a and 20b are in a state of being maximally approached by being given a force by the pressure of the oil flowing from the split ports 14a and 14b. In this way, the oil that has flowed in from the split ports 14a and 14b is collected in the collecting port 12 and flows into the pipe 12.

Here, in the distribution valve 34, as in the case of dividing the oil, the holes 26a and 26b usually have the same degree of throttling. Therefore, normally, the flow rates of oils flowing from the split ports 14a and 14b are the same. If the flow rates of the oils flowing from the split ports 14a and 14b are the same, the differential pressure between the split port 14a and the collecting port 12 is the same as the differential pressure between the split port 14b and the collecting port 12. The split ports 14a and 14b have the same pressure.

However, for example, due to the influence of hydraulic equipment connected on the downstream side of the pipe 13b, the split port 14
The pressure of b becomes higher than that of the split port 14a, the pressure drop to the collecting port 12 increases, and the split port 14
The flow rate of b may increase. In this case, the pressure in the hollow chamber 22b increases as compared with the pressure in the hollow chamber 22a, so that the entire spool 18 begins to slide toward the hollow chamber 22a. As the entire spool 18 slides toward the hollow chamber 22a, the hole 26b is disengaged from the recess 28b and the hole 26b is gradually closed. As the hole 26b is gradually closed, the pressure in the hollow chamber 22b rises, and the entire spool 18 slides toward the hollow chamber 22a until the pressure in the hollow chamber 22b becomes equal to the pressure in the hollow chamber 22a. Becomes Since the pressure in the hollow chamber 22b becomes the same as the pressure in the hollow chamber 22a, the pressure drops in the holes 26a and 26b become the same, and
The flow rates of 6a and 26b are kept the same. Holes 26a and 26
By keeping the flow rate of b the same, the split port 14
The flow rates of a and 14b remain the same. Even when the pressure of the split port 14a becomes higher than that of the split port 14b, the split ports 14a and
The flow rate of 4b remains the same.

In this way, when the oil is split from the collecting port 12 into the dividing ports 14a and 14b, or from the dividing ports 14a and 14b.
In the case of collecting into two, the split ports 14a and 1
The flow rate of 4b is kept uniform, and the flow rates of the tubes 13a and 13b are kept uniform.

The general operation of the flow-dividing valve 34 has been described in detail above, but the operation peculiar to the flow-dividing valve 34 of the present invention will be described below.

In such a branching / collecting valve 34, for example, when the hydraulic equipment connected to the division ports 14a and 14b is a cylinder, the spool 18 is biased toward the sliding member 20b side as shown in FIG. At times, the recess 28b is closed, and oil will not flow from the hole 26b to the split port 14b.

However, the oil in the hollow chamber 22b is drained 36b.
Through to the split port 13b. Since the oil flows through the drain hole 36b to the split port 14b,
The cylinder connected to the pipe body 13b is a spool 18
Operates quickly without waiting for the to return to the neutral position.

According to such a diverter valve 34, even if the spool 18 is biased to one side and the recess 28b is closed and the flow rate is biased, the oil can be drained from the drain hole 36a or 36b. Therefore, the cylinder connected to the pipe body 13a or 13b can be quickly operated without stopping. Further, the spool 18 can be quickly returned to the neutral position while draining oil from the drain hole 36a or 36b. Therefore, the two split ports 14a and 14
It is possible to quickly return to the state where the flow rate of b is kept the same.

Although one embodiment of the present invention has been described above, the flow distribution valve according to the present invention can be implemented in other modes.

For example, the distribution valve of the present invention may be a distribution valve 40 as shown in FIG. This diversion valve
It is provided with drain holes 38a and 38b for draining oil. As shown in FIG. 4, the hole 38b is provided along the sliding surface of the inner wall of the main body 15 with the spool 18,
Even if the spool 18 is biased to one side, the oil can be drained to or from the split port 14b. Although illustration is omitted, a hole 38a symmetrical to the hole 38b is provided on the opposite side of the spool 18 from the hole 38b side.

Further, the distribution valve of the present invention may be a distribution valve 42 as shown in FIG. This branching / collecting valve is provided with drain holes 44a and 44b for draining oil. As shown in FIG. 5, the hole 44b is provided along the tip of the hollow portion 16 from the sliding surface of the inner wall of the main body 15 with the spool 18, and the spool 18 is biased to one side to the maximum extent. Even when it is in close contact with the tip, the oil can be drained to the split port 14b.
Although illustration is omitted, a hole 44a symmetrical to the hole 44b is provided on the opposite side of the spool 18 from the hole 44b side.

Next, the distribution valve of the present invention may be a distribution valve 46 as shown in FIG. This diversion valve is provided with drain holes 48a and 48b for draining oil. As shown in FIG. 6, the hole 48b is provided in the spool 18
It is provided along the sliding surface with the inner wall of the main body 15 of the main body of the oil, and even if the spool 18 is biased to one side,
It is configured so that it can be pulled out to 4b. In addition,
Although illustration is omitted, a hole 48a symmetrical to the hole 48b is provided on the opposite side of the spool 18 from the hole 48b side.

Further, the distribution valve of the present invention may be a distribution valve 50 as shown in FIG. This branching / collecting valve is provided with vent holes 52a and 52b and vent holes 54a and 54b. As shown in FIG. 7, the hole 52b is provided along the sliding surface of the spool 18 with the inner wall of the main body 15, and the hole 54b is provided in the sliding member 20b so as to be continuous with the hole 52b. Therefore, even if the spool 18 is biased to one side, the oil can be drained to the split port 14b. Although illustration is omitted, a hole 52a symmetrical to the hole 52b is provided on the opposite side of the spool 18 from the hole 52b side. Further, a hole 54a symmetrical to the hole 54b is provided on the opposite side of the spool 18 from the hole 54b side.

Although the branching and collecting valve which can be used for both branching and collecting has been described above, the structure of the branching and collecting valve according to the present invention may be used for the branching valve or the collecting valve. For example, the flow dividing valve 60 shown in FIG. 8 is configured such that sliding members 62a and 62b similar to the sliding members 20a and 20b of the flow dividing valve 10 are fixed by a fixing member 64 at a position where they can be used as a flow dividing valve. . Further, the flow collecting valve 66 shown in FIG. 9 has a sliding member 6 similar to the sliding members 20 a and 20 b of the branching and collecting valve 10.
8a and 68b are fixed by a fixing member 70 at a position where they can be used as a flow dividing valve. It should be noted that the two sliding members may be separated or approachable and may be fixed by a screw or the like, and may be appropriately changed to a flow dividing valve or a flow collecting valve.

Although various embodiments of the flow-dividing valve according to the present invention have been described above with reference to the drawings, the flow-dividing valve according to the present invention is not limited to those shown in the drawings.

For example, the branching / collecting valve according to the present invention is not limited to the one used in a hydraulic circuit, but may be used in a fluid other than oil. Further, the shape of the collecting port or the dividing port of the branching and collecting valve according to the present invention is not particularly limited,
Anything that can connect a pipe and allow a fluid to pass therethrough may be used. Further, the shape and structure of the narrowed portion are not limited to those described above, and may be a gap formed by combining two or more parts. Further, the shape and structure of the spool are not limited to those described above, and may be a combination of three or more parts. Further, the pair of sliding members each having a narrowed portion are not limited to those described above, and may have different shapes. Also,
The number is not particularly limited to two. Further, it may be a sliding member provided with a tubular member in the hollow portion of the main body and separated or approaching each other within the tubular member.

The branching / collecting valve according to the present invention is limited to a branching / collecting valve of a type for controlling the flow rate so as to keep the flow rate of one split port and the flow rate of the other split port the same. Instead of setting the flow rate of one split port to the flow rate of the other split port to 1: 2, 1: 2.5 or 1
It is also possible to provide a branching valve of a type in which the flow rate is controlled so as to maintain the ratio to 3 or the like with a vent hole. Note that the configuration of the flow collecting valve that makes the flow rate of the one dividing port different from the flow rate of the other dividing port is, for example, the hole 2 in the flow collecting valve 34 shown in FIG.
4a is made wider than the fluid passage area of the hole 24b, and the spool 18 is biased toward the hollow chamber 22b to form the hole 26
It becomes possible by narrowing b.

In addition, the present invention can be carried out in a mode in which various improvements, modifications and variations are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention.

[0046]

According to the branching / collecting valve of the present invention, the fluid can be drained from the vent hole even when the passage to one of the division ports or the passage from the one of the division ports is closed. . Therefore, the actuator connected to this split port can be quickly operated without stopping.

A spool having a plurality of throttles and capable of restricting the throttles by sliding in the direction in which the fluid flow of the collecting port or the dividing ports is blocked is provided. While increasing the pressure of the other split port, the throttling part corresponding to the other split port is throttled, while the pressure of one of the split ports is increased compared to the pressure of the other split port when collecting. According to the branching / collecting valve of the present invention, which is characterized in that the throttle portion corresponding to one of the split ports is narrowed, the spool is biased to one side and the passage to the one split port or Even if the passage is closed and the flow rate is uneven, oil can be drained from the drain hole. Therefore, without waiting for the spool to return to the normal position, the actuator connected to this split port can be quickly operated without stopping.

Further, according to the branching / collecting valve, the spools are separable or approachable in the sliding direction, and each of the spools is provided with a pair of sliding members having a throttle portion. When splitting oil from the collecting port to two split ports, the pair of sliding members are separated by the pressure of the oil flowing from the collecting port to the maximum extent, and the oil is collected from the split port to the collecting port. In such a case, the pair of sliding members will be closest to each other. Therefore, it can be used as a flow rate control valve in a form corresponding to each of the flow dividing and the flow collecting.

[Brief description of drawings]

FIG. 1 is a front cross-sectional view showing a distribution valve according to the present invention.

FIG. 2 is a front sectional view showing a usage state of the branching and collecting valve shown in FIG.

FIG. 3 is a front sectional view showing a usage state of the branching and collecting valve shown in FIG.

FIG. 4 is a partially crushed front sectional view showing another embodiment of the branching and collecting valve according to the present invention.

FIG. 5 is a partially crushed front sectional view showing still another embodiment of the branching and collecting valve according to the present invention.

FIG. 6 is a partially crushed front sectional view showing still another embodiment of the branching / collecting valve according to the present invention.

FIG. 7 is a partially crushed front sectional view showing still another embodiment of the branching / collecting valve according to the present invention.

FIG. 8 is a front sectional view showing still another embodiment of the branching / collecting valve according to the present invention.

FIG. 9 is a front sectional view showing still another embodiment of the branching / collecting valve according to the present invention.

FIG. 10 is a view showing a conventional diversion pipe, which is a plan sectional view showing an example of FIG. 10A, and FIG. 10B is a plan sectional view showing another example.

FIG. 11 is a front sectional view showing a conventional branching / collecting valve.

FIG. 12 is a front cross-sectional view showing a usage state of the branching and collecting valve shown in FIG. 11.

FIG. 13 is a front cross-sectional view showing a usage state of the branching and collecting valve shown in FIG. 11.

[Explanation of symbols]

34, 40, 42, 46, 50, 60, 66; branching and collecting valves 11, 13a, 13b; pipe body 12; collecting ports 14a, 14b; dividing port 15; body 16; hollow part 18; spools 20a, 20b; Moving members 26a, 26b; Holes (throttle portions) 36a, 36b, 38a, 38b, 44a, 44b, 4
8a, 48b, 52a, 52b, 54a, 54b; holes

Claims (3)

(57) [Claims] 1. At least one collecting port and a plurality of dividing ports, wherein the fluid flowing from the collecting port is branched to the plurality of dividing ports while the fluid flowing from the plurality of dividing ports is divided. A branching-and-collecting valve for collecting the flow to the collecting port, a throttle part corresponding to each divided port is provided between the collecting port and the plurality of divided ports, and the pressure drop of the plurality of throttle parts is kept substantially constant. Is a branching / collecting valve capable of controlling the flow rate such that the flow rate of each split port is substantially constant, and a hollow portion between the gather port and the plurality of split ports.
And having the plurality of throttle portions, the collecting port
Alternatively, the hollow portion is provided in a direction that blocks the flow of fluid in the split port.
A spool that can squeeze the throttle by sliding inside
And the spool is separable or approachable in its sliding direction.
And each of them has the above-mentioned throttle part to make a pair and
It is configured with a sliding member connected with each other, and the pressure of one split port divides the other split
As the port pressure increases, the other split port
While squeezing the throttle part that corresponds to the
The pressure in one split port is
Throttle corresponding to one split port as
In minute current flow valve for throttling a case where the narrowed portion is closed vent hole to pull fluid from the to split port or the split port from the set port to said collection port is provided in the flow the fluid through the vent hole A branching and collecting valve characterized by that. 2. One of the collecting ports is provided,
The branching / collecting valve according to claim 1, wherein two split ports are provided . 3. The fluid is oil and the split port
The branching / collecting valve according to claim 1 or 2, to which a hydraulic device is connected .