JP2748083B2 - Self-cleaning type variable constant flow rate control lift valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve device having an automatic throttle control flow path installed in a fluid transport pipeline, and exhibits an effect as a variable constant flow control valve convenient for planned water supply and distribution. In addition to providing a lift valve device structure that is simple and easy to operate even if the size and pressure are increased, in practical use, there is no slight strong drift or turbulence near the valve opening. It is another object of the present invention to provide an epoch-making valve device which is free from vibration phenomena and shock phenomena (including cavitation phenomena) and operates to self-clean the clogging caused by earth and sand, dust and the like. In this specification, the language of water is a generic term for liquid.

[0002]

2. Description of the Related Art Generally, when a valve device is used as a simple on-off valve, for example, a butterfly valve, a gate valve, and the like may be sufficient, but the shape of the valve opening is generally irregular. The flow passing through the valve opening is likely to be deviated or turbulent, inducing vibration and impact phenomena, accompanied by rapid erosion and breakage of the valve main part, or extreme noise and vibration,
There was a problem that they struggled with the measures. On the other hand, lift valves have a structure that can be adapted in an ideal shape for the purpose of adjusting the flow rate, but if care is not taken, they cannot be used due to the deviation of the receiving pressure. Therefore, conventionally, various methods have been adopted, such as using a double-seat type to balance the axial thrust, and in a single-seat type lift valve, reducing the axial thrust by providing a balance piston unit integrated with the valve shaft. While being applied.

[0003]

However, the conventional lift valve device still has a number of problems.
As described above, in the case of a high pressure type or a large diameter type, the means for reducing the axial thrust is not simple, there is a disadvantage that the manufacturing cost is unnecessarily increased, and in controlling the flow rate in a pipe line with severe pressure fluctuation, Countermeasures are not easy. Further, as a problem in practical use, similar to other types of valve devices, clogging accidents such as earth and sand and dust due to narrowing of a valve opening when adjusting to a small amount of water is a difficult problem.

According to the present invention, it is possible to eliminate the clogging accident at the valve opening part by always making the rotation power extremely small, stabilizing the flow control performance, and adding the unique operation of the flow control valve body. It is an object of the present invention to obtain a simple valve device that can perform the above operation.

[0005]

Means for solving the problems of the present invention have been described above with respect to the essential points, and will be further described below with reference to the drawings of one embodiment. FIG. 1 shows a flow control valve member 7 formed upstream of a flow control valve valve opening b.
In the valve box composed of the valve box 1 having the opening and the sliding valve side valve box cover 2, a flow control valve opening b is provided between the flow control valve seat surface 3 and the corresponding flow control valve member 7. Is formed between the closing surface member 4 of the slide valve and the cylindrical member 11 of the slide valve corresponding thereto. Then, the gentle flow chamber c is sandwiched between the valve opening b and the valve opening d.
Is configured.

A bag chamber g formed between the slide valve end member 10 and the slide valve side valve box cover 2 is communicated with the inlet flow passage a through the communication member 17 through the seal member 14. At the same time, the balance spring 13 is interposed to form an automatic throttle adjustment flow path at the slide valve opening d. The flow control valve member 7 is pressed against the stepped portion 6q of the valve shaft 6 in a watertight and slidable manner by a spring 9 having a predetermined force. Note that the relationship between the pressure receiving areas of the flow control valve member 7 and the sliding valve end side member 10 is basically substantially equal, and in the present embodiment, the total thrust of both surfaces of each valve during operation. Is set so that the valve member 10 has a slightly higher priority.

[0007] In FIGS. 2 and 3, the flow rate adjusting valve member 27 on the downstream side of the flow control valve valve opening b; are shown that is configured to 47. Further , in FIG. 3, the valve opening b;
In order to make the shape of the flow path d uniform, the fitting surface of the end portion 51m is set to the inside. Therefore, in order to minimize the difference in pressure receiving area before and after the slide valve, its tip is made as thin as possible,
Care has been taken to eliminate the adverse effects. Note that FIG.
And in the embodiment of FIG. 3, both sides of each valve during operation
The thrust of the valve members 27 and 47 is slightly higher
It is desirable to set

[0008]

[Action] Observing the action according to FIG.
Since the flow control valve element 7 is fully opened and there is almost no differential pressure between the primary pressure and the secondary pressure, the sliding valve portion is also almost fully opened. Accordingly, the flow is maintained at the predetermined maximum flow rate, and the inlet flow path a → the flow control valve opening b → the gentle flow chamber c
It flows in the order of the sliding valve opening d, the outlet collecting channel e, and the outlet channel f. In this state, the force of the balancing spring 13 in the direction of opening the valve opening d is caused by the difference between the pressure of the bag chamber g acting on the pressure receiving surface before and after the sliding valve end side member 10, that is, the pressure of the inlet channel a and the gentle flow chamber c. Which is due to the flow resistance at the flow control valve opening b.

Next, when the flow control valve element 7 is brought closer to the valve seat surface portion 3 for flow control, the pressure in the gentle flow chamber c naturally decreases as the resistance of the valve opening b increases, and the balancing spring 13 At the same time that the sliding valve cylindrical member 11
11m approaches the end face 4m of the sliding valve closing surface member 4 and becomes an automatic throttle control flow passage just enough for its flow state, and is stabilized. In this state, the bias pressure acting downstream of the flow control valve member 7, that is, upward in the drawing, is a slight flow resistance at the flow control valve opening b, and the acting force on the valve shaft is Minor. Further, when the flow control valve member 7 is shortly before the cutoff or reaches the cutoff, the flow control valve boss 8 and the end faces 8i; 12i of the slide valve boss 12 come into contact with each other. Thus, the present invention provides a means for balancing axial thrust according to the present invention. Therefore, by these actions, the turning force for operating the handle is light throughout the entire process.

When the flow rate is adjusted to a small amount of water, the flow passage area of the flow control valve opening b becomes narrow, and
When the clogging phenomenon occurs due to dust or the like, the internal pressure of the gentle flow chamber c decreases instantaneously, and the slide valve shifts and displaces so as to narrow the slide valve opening d. Numeral 12i abuts on the end face 8i of the flow control valve boss to push down the valve member 7, and at the same time flushes the flow downstream to eliminate the clogging of the valve opening b. Further, when clogging occurs in the slide valve opening d, the internal pressure of the gentle flow chamber c instantaneously rises, so that the slide valve body is instantly pushed up to expand the valve opening d and move toward the downstream side. Rinse and generate flow to eliminate the clogging phenomenon. Therefore, according to the present invention, a lift valve device which is light in valve operation and has a function of steadily preventing clogging, in addition to excellent constant flow characteristics, is obtained.

The operation will be described with reference to FIG. In the illustrated state, the flow control valve member 27 is almost fully opened,
Since the differential pressure is small as in FIG. 1, the sliding valve portion is also almost fully opened. Accordingly, the flow is maintained at the predetermined maximum flow rate, and in substantially the same manner as in FIG.
It flows in the order of the sliding valve opening d, the outlet collecting channel e, and the outlet channel f. Next, when the valve member 27 is brought closer to the valve seat surface portion 23 for flow rate adjustment, the resistance of the valve opening b increases and the internal pressure of the gentle flow chamber c decreases as in the operation state of FIG. The balance of 33 is broken, and the slide valve portion is operated to correct it, and the opening d of the portion is narrowed, and the flow state is appropriately stabilized. When the valve member 27 is clogged, the internal pressure of the gentle flow chamber c is instantaneously reduced, and the valve member 27 is pushed up to expand the flow path, to be washed out and to start the flow to remove it.

[0012] operation in Figure 3 is substantially similar to that of FIG. 2 are in Igai screw type where the threaded portion of the flow-rate regulating valve operation is employed, therefore, the valve member 47 the valve shaft 4
Move up and down without turning with 6 to adjust the constant flow value.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described with reference to the drawings. FIG. 1 shows a flow control valve member 7 provided upstream (inlet side) of a flow control valve opening b. Water on the upstream side is shut off by the valve member 7.
A valve box screw 16 for opening and closing the valve is provided at the bottom of the valve box so that the main part of the valve device can be easily disassembled and inspected. Therefore, the valve shaft 6 rotates with the handle 15.

FIG. 2 shows a flow control valve member 27 provided downstream (outlet side) of the flow control valve opening b. The valve operation is as described in the operation section. The one in Figure 3
Although the configuration of the valve box and each valve section is almost the same as that of FIG. 2,
Since the external screw type is applied and the handle screw 55s is provided on the handle 55 for opening and closing the valve, the valve shaft supporting member 5
In conjunction with the action of the key groove portion 56k of No. 6, the valve shaft 46 only moves up and down without turning. Further, in this embodiment, a structure in which the valve seat surface portion 43 and the closing surface member 44 are arranged in one plane in order to arrange the flow path is applied. Therefore, a thin member is considered for the edge portion 51m. Have been. In adopting this embodiment, it is convenient to use a special material for that part especially when handling a liquid which is extremely worn or corroded. In addition, if the end portion is formed in a double cylindrical shape and is configured to allow retreat when the front end comes into contact, the valve seat surface portion can be aligned in one plane, and the flow becomes more uniform.

In implementing the present invention, due to its design,
Alternatively, in practice, it is needless to say that the operating handle can be attached to the opposite side, the valve shaft can be turned sideways, and an O-ring, an oil seal, a diaphragm plate, a velofram, or the like can be applied to the sealing member. Further, it is convenient in terms of work to use springs such as a balance spring and a flow rate control valve spring by storing a spring member compressed to a predetermined value in a telescopic double tubular sheath. Note that 5w in FIG. 1 indicates that when a diaphragm plate is applied to the sealing member, the member is a partition member 5 due to high pressure or the like.
An example of a support plate for preventing pressure bonding to the substrate is shown. In addition, although the saw-tooth-shaped channel portion 4t is illustrated in the closing surface member 4, it shows an application example of more strict cavitation reducing means often used particularly for large-sized valve devices.

[0016]

As described above, the valve device of the present invention
While utilizing the advantages of the lift valve structure drastically, the problems of conventional various valve devices accompanying large size and high pressure have been largely solved,
Due to its constant flow rate characteristics and the effect of lightening of the rotating power and the effect of preventing clogging of the valve opening, for example, agricultural water and civil engineering water for which the application should allow some soil, dust, etc. in the system. It can be applied to flow control valve devices in various industries, such as a solar system that can easily use low power even in areas or remote remote areas where power sources cannot be obtained. This is a great achievement.

[Brief description of the drawings]

FIG. 1 is an overall cross-sectional view showing one embodiment of the present invention.

FIG. 2 is an overall cross-sectional view showing one embodiment of the present invention.

FIG. 3 is an overall cross-sectional view showing one embodiment of the present invention.

[Explanation of symbols]

1; 21; 41: valve box; 2: 22; 42: sliding valve side valve box cover; 3: 23; 43: flow control valve valve seat surface;
24; 44: sliding valve closing surface member; 4t: serrated flow path portion; 5: 25; 45: partition member; 5w: diaphragm support plate; 6; 26; 46: valve shaft; 6q: valve shaft stepped portion; 6 s; 26 s; 46 s: valve shaft thread portion 7; 27; 47: flow control valve member;
48i: Flow control valve boss end face, 9: Flow control valve spring, 10; 30; 5
0: Sliding valve end side member, 11; 31; 51: Sliding valve cylindrical member, 11m; 31m; 51m: Sliding valve cylindrical member end edge, 12; 32; 52: Sliding valve boss, 12i;
2i; 52i: End face of the sliding valve boss portion; 13; 33; 53
... balance spring, 14; 34; 54 ... seal member,
15; 35; 55: handle, 55s: handle screw portion, 16: valve case screw portion, 36; 56: valve shaft support member, 56k: key groove portion, 17; 37; 57: communication passage.
a: inlet flow path, b: flow control valve valve opening, c: slow flow chamber, d: sliding valve valve opening, e: outlet collecting flow path, f: outlet flow path, g: bag chamber.

Claims (2)

(57) [Claims] A slide valve portion for performing an automatic throttle control operation is provided downstream (outlet side) corresponding to a flow control valve portion provided upstream (inlet side) of a valve device, and a slide valve portion is provided in the middle thereof. In the variable constant flow control valve device in which the flow chamber (c) is formed, the flow control valve member (7; 27; 47) has a structure that allows retreat by a change in the internal pressure of the slow flow chamber (c). In addition to the configuration, the valve member (11; 3) slides on the partition member (5; 25; 45) attached to the valve box (1; 21; 41).
1; 51) is hermetically and slidably fitted through a sealing member (14; 34; 54), and the end portion (1) of the tubular member is fitted.
1m; 31m; 51m) and the sliding valve closing surface member (4; 24; 44) facing the sliding valve valve opening (d) to form a sliding valve end side member (10; 30; 50). And the flow control valve member (7; 27; 47) between the valve shaft (6; 2).
6; 46), a balancing spring (13; 33; 53) acting in the direction of always opening the valve opening (d) with a predetermined force is interposed, and the sliding valve end member (10; 30; 50) is interposed. The bag chamber (g), which is formed between the sliding valve side valve box lid (2; 22; 42) and the sliding valve side lid, is communicated with the inlet channel (a) through the communication passage (17; 37; 57). By forming the automatic throttle control flow path in the valve opening (d), the function of constantly variable flow control is exhibited, and at the same time, the flow control valve opening (b) and the slide valve opening (d) are not clogged. A self-cleaning operation type variable constant flow control lift valve device characterized in that each time the valve element automatically performs an appropriate opening operation, it is flushed downstream to generate a flow, even if it occurs. 2. The flow control valve is constituted by minimizing the difference in pressure receiving area between the slide valve end side member (10; 30; 50) and the flow control valve member (7; 27; 47). When operating from just before the deadline to the deadline,
The flow control valve boss (8; 28; 48) and the slide valve boss (12; 32; 52) are abutted and integrated, so that the turning power of the control valve operating handle (15; 35; 55) is small. The self-cleaning operation type variable constant flow rate control lift valve device according to claim 1, wherein: