JP2546820Y2 - Split flow valve with operation guide mechanism - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diverter valve capable of diverting or collecting a fluid.

[0002]

2. Description of the Related Art Conventionally, a flow collecting valve has a structure in which two divided spools are provided in a valve box in order to have a pressure compensating function. This conventional flow collecting valve has a structure as shown in FIGS. 3 and 4 of the drawings. FIG. 3 is a sectional view showing a state at the time of flow splitting, and FIG. 4 is a sectional view showing a state at the time of flow collecting. It has become.

[0003] As shown in these figures, two split spools (2) and (3) are provided in a valve box (1). Conventionally, the split spools (2) and (3) are provided with two split spools. Each is provided with a central hook (k), which is operated in the state of maximum separation when the central hooks (k) are crossed each other at the time of branching, while this central hook (k) is operated at the time of confluence. Are made to operate in the closest state in which they are brought into contact with each other's front surface.

The fluid flows as indicated by the arrows in the figure, and at the time of branching, the fluid entering from the main port (4) enters the left and right spool inner chambers (5) and (6) respectively with fixed throttle holes (7) and (6). 8), the split spool (2)
From the differential pressure adjusting holes (9) and (10) in (3), the branch port (1
1) and (12). On the other hand, at the time of collection, the fluid entering from the branch ports (11) and (12) flows in the opposite direction to the above and collects and flows into the main port (4). .

[0005]

SUMMARY OF THE INVENTION The above-mentioned conventional flow collecting valve is divided into two spools (2) and (3).
, There is no action to accurately guide the moving direction of the entire spool, and therefore, there is a major drawback that the center shift occurs and it is difficult to smoothly operate the spool. .

[0006] Further, in the conventional flow collecting valve, since the moving distance of the separation / contact is relatively narrow, it is necessary to enlarge the entire valve in order to increase the moving distance, and it is difficult to make the valve compact. ing. Further, in the conventional collecting flow valve, the left and right split spools (2) and (3) rotate simultaneously during operation due to the presence of the central hook portion (k), and the split spools (2) and (3) are rotated by the rotational energy. This has the disadvantage that the balance of the received fluid pressure is lost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the conventional flow collecting valve.
Providing a new and useful split flow valve with an operation guide mechanism that improves the smooth operation of the split spool, has excellent split flow accuracy, can be compactly designed, and can rotate the left and right split spools independently. It is assumed that.

[0008]

As a result of various studies to achieve the above object, as means for connecting the two split spools in a detachable manner, a piston type, that is, a circular type is used.
A connecting opening protruding in a cylindrical shape is provided, and a connecting insertion portion which is slidably inserted into the connecting opening is provided on the other side, and the connecting opening and the connecting insert are slidably assembled. If they did, they would find that this structure would work as an excellent operation guide mechanism (guide), and that a very high degree of effect would be obtained.

[0009] The present invention, in one of the main ports and two divided spool comprising disjunctive freely provided min current flow valve in the valve box and a two branch ports, the one split spool cylinder A divergent flow valve with an operation guide mechanism, characterized in that it has a connection opening protruding in a shape, and has a connection insertion portion in which the other split spool is slidably inserted into the connection opening. , Is the gist.

FIGS. 1 and 2 are sectional views showing the structure of the diversion / collection valve of the present invention. FIG. 1 shows the case of diversion, and FIG. 2 shows the case of diversion. As shown in these figures, also in the present invention, the valve box (1) has one main port (4) and two branch ports (11) and (12), and the valve box chamber provided therebetween. , Two split spools (2) and (3) are incorporated in such a manner that they can be freely attached and detached.

One of the split spools (2) (left side in the figure) has a cylindrical connecting opening (13) at the center end thereof, and the other (right side in the figure) split spool (2). 3) has a connection insertion portion (14) that is slidably inserted into the connection opening (13). The distal end of the connecting insertion portion (14) has a stopper larger than the diameter of the connecting opening (13) in order to determine the maximum separation distance between the split spools (2) and (3).

The end springs (15) and the center spring (16) shown in the drawings are auxiliary members provided so that the integral spools (2) and (3) can be smoothly moved integrally and separated from each other. Without these, they have the function of a flow collecting valve, but without the end spring (15) and the central spring (16), they can move integrally and separate at the time of flow splitting, and can move integrally at the time of flow collecting. It is difficult to move quickly, approaching movements, and even initial movements that require agility.

According to the present invention, the separation and separation of the split spool (2) and the split spool (3), that is, the split spool (2)
Since the distance variation between (3) is performed by a piston method, that is, by sliding the connection opening (13) and the connection insertion part (14), the split spools (2) and (3) are unified. At the same time, since the split spools (2) and (3) are integrated, the smooth operation of the split spools (2) and (3) is improved even when the split spools (2) and (3) move left and right. In addition,
It is needless to say that the connection opening (13) and the connection insertion part (14) as the operation guide mechanism are desirably finished precisely and neatly.

[0014]

Operation First, the operation at the time of split flow will be described with reference to FIG. As shown by the arrows in FIG. 1, the fluid enters the spool inner chambers (5) and (6) from the fixed throttle holes (7) and (8) through the main port (4). At this time, the two divided spools (2) and (3) are fixed in a state of extending left and right by a pressure difference (differential pressure between the main port and the spool inner chamber) before and after the fixed throttle holes (7) and (8). It stops at the position where the pressures in the spool inner chamber (5) and the spool inner chamber (6) are balanced. Spool inner room (5) (6)
The fluid that has entered flows out of the differential pressure adjusting holes (9) and (10) and flows out to the branch ports (11) and (12).

If the load on the branch port (12) increases and the flow deteriorates, the pressure on the branch port (12) and the pressure in the spool inner chamber (6) increase, so that the spool inner chamber (5) increases. The pressure balance between (6) is broken. When the pressure balance is lost, the entire spool moves integrally to the lower spool inner chamber (5). Due to this movement, the differential pressure adjusting hole (9) is narrowed, the pressure in the spool inner chamber (5) rises, and the entire spool moves until the pressures in the spool inner chambers (5), (6) are balanced to maintain the balance. .

Therefore, the pressure difference between the main port (4) and the spool inner chamber (5) and between the main port (4) and the spool inner chamber (6), that is, the pressure difference before and after the fixed throttle holes (7) and (8) are the same. Thus, the outflow amount of the branch port (11) and the outflow amount of the branch port (12) are maintained at a constant ratio. That is, at the time of split flow, it functions as a pressure compensation for keeping the differential pressure before and after the fixed throttle holes (7) and (8) constant regardless of the load fluctuation.

Next, the operation at the time of flow collection will be described with reference to FIG. As indicated by the arrows in FIG.
1) Spool inner chamber (5) through differential pressure adjusting hole (9)
And flows into the spool inner chamber (6) from the branch port (12) through the differential pressure adjusting hole (10). The fluid in the spool inner chambers (5) and (6) is supplied to the fixed throttle holes (7), respectively.
Through (8), they merge at the main port (4) and flow out. At this time, due to the pressure difference between the fixed throttle holes (7) and (8), the split spools (2) and (3) are fixed in the closest state, and at a position where the pressures in the spool inner chambers (5) and (6) are balanced. Stop.

If the load on the branch port (12) increases and the flow rate to the branch port (12) increases, the pressure between the branch port (12) and the spool inner chamber (6) increases. The pressure balance between the inner chambers (5) and (6) is lost. Due to the pressure imbalance, the entire spool moves integrally to the spool inner chamber (5) having a lower pressure, and this movement narrows the differential pressure adjusting hole (10) to suppress the inflow. The pressure in 6) is reduced, and the entire spool moves and maintains balance until the spool inner chambers (5) and (6) equilibrate.

Therefore, the pressure difference between the spool inner chamber (5) and the main port (4), and between the spool inner chamber (6) and the main port (4), that is, the pressure difference before and after the fixed throttle holes (7) and (8) is the same. Thus, the inflow amount of the branch port (11) and the inflow amount of the branch port (12) are maintained at a constant ratio. In other words, even at the time of confluence, it acts as a pressure compensator for keeping the differential pressure across the fixed throttle holes (7) and (8) constant irrespective of load fluctuations.

The present invention min current flow valve, in order to exert such pressure compensation function described above, the sliding distance as the most important split spool (2) (3) operating guide mechanism for facilitating integral movement of It has a connecting sliding structure of a long piston type of is the improvement of the minute current flow accuracy is achieved.

[0021]

[Effects of the present invention] The effects of the present invention are listed below. (A) Since there is a piston-type operation guide mechanism that is precisely and neatly finished, the two split spools are unified, and an integral spool operation is achieved. (B) Therefore, misalignment as in the prior art can be prevented, the spool can be operated smoothly, and the accuracy of collecting and collecting current is improved.

(C) At the time of flow collection, the connecting insertion portion is inserted deeply into the inner space of the other spool, so that the spool movement distance during the flow splitting and flow collection can be long. Therefore, when the moving distance is designed to be the same as that of the conventional hook type, the present invention can be designed to be quite compact. (D) In the conventional hook type, the balance of the left and right split spools is lost due to the rotational energy because all the spools rotate simultaneously during operation. However, in the structure of the present invention, the left and right split spools can rotate independently because they can rotate independently. Can absorb energy. As described above, the present invention has various excellent effects, has high accuracy of the pressure compensation function, and exhibits extremely remarkable usefulness as a novel flow collecting valve.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a diversion / collection valve of the present invention, showing a state at the time of diversion.

FIG. 2 is a cross-sectional view of the flow collecting valve of the present invention, showing a state at the time of flow collection.

FIG. 3 is a cross-sectional view of a conventional flow collecting valve, showing a state of flow splitting.

FIG. 4 is a cross-sectional view of a conventional split flow valve, showing a state at the time of flow collection.

[Description of sign]

 (1) Valve box (2) Split spool (3) Split spool (4) Main port (5) Spool inner chamber (6) Spool inner chamber (7) Fixed throttle hole (8) Fixed throttle hole (9) Differential pressure adjustment Hole (10) Differential pressure adjusting hole (11) Branch port (12) Branch port (13) Connection opening (14) Connection insertion part (15) End spring (16) Central spring

Claims (1)

(57) [Scope of request for utility model registration] 1. A split flow valve comprising two split spools provided in a valve box having one main port and two branch ports so as to be freely separated from each other, and one of the split spools has a cylindrical shape.
A split flow valve with an operation guide mechanism, comprising: a projecting connection opening; and a connection insertion portion in which the other split spool is slidably inserted into the connection opening.