JPS628697Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) This invention relates to a flow rate control valve used for example to adjust the flow rate of water pipes. This invention relates to a flow rate regulating valve which, when a small hole having a large diameter on the outer periphery is clogged with foreign matter such as dust, can be removed by cleaning the small hole.

(Prior art) As a conventional valve of this type, for example,
The one disclosed in Publication No. 15864 is known.
As shown in Fig. 1, this has an inlet 2a on one side,
The inside of the valve box 1a having the outlet 3a on the other side is connected from above by an upper partition wall 4a and a lower partition wall 5a, which are fixed laterally to the inner wall of the valve box at a predetermined interval in the vertical direction. An inlet chamber 7a having an inlet 2a and an outlet chamber 8a having an outlet 3a
A hollow cylindrical valve body 10a with open upper and lower ends is inserted into the three chambers 6a, 7a, 8a so as to be slidable vertically through both the partition walls 4a, 5a. The lower part of the circumferential wall of the valve body 10a is formed as a flow rate control part 23a having a large number of tapered small holes 22a with a larger diameter on the outer circumferential side, and the middle part is non-porous and can block the inflow chamber 7a. Fully closed part 2
4a, and the upper part thereof is formed as a fluid introduction part 26a having a plurality of openings 25a larger than the small holes 22a.

Then, the flow rate control unit 23a is located in the inflow chamber 7a, and the fluid from the inflow port 7a is introduced into the valve body 10a through the small hole 22a, and the flow rate is in the open state where the fluid flows out from the inside of the valve body 10a to the outflow chamber 3a. To adjust the flow rate control section 2 located in the inflow chamber 7a, slide the valve body 10a downward from this state.
The opening number of the small hole 22a of 3a is decreased to reduce the flow rate, and from this reduced state, the valve body 10a is slid upward to increase the opening number of the small hole 22a to increase the flow rate. The flow rate is adjusted by increasing or decreasing the numerical aperture of the small holes 22a of the flow rate control section 23a. Next, the small hole 2 that was clogged with foreign matter during the flow rate adjustment.
When cleaning the valve body 2a, the valve body 10a is slid downward to bring its lower end into contact with the bottom wall of the outflow chamber 8a, and the fluid introduction part 26a of the valve body 10a is positioned in the inflow chamber 7a. As a result, the fluid in the inflow chamber 7a is introduced into the valve body 10a from the opening 25a of the fluid introduction part 26a, and further flows from the inside of the valve body 10a to the outside of the valve body 10a through the small hole 22a. When passing through, the small hole 22a is cleaned to remove foreign matter clogging the small hole 22a, and the removed foreign matter flows out through the outflow chamber 8a to the outflow port 3a. To achieve the fully closed state, the valve body 10a is slid upward to position the fully closed portion 24a in the inflow chamber 7a. This results in
The flow of fluid from the inlet 2a is completely blocked.

By the way, in the conventional valve, when switching from the flow rate adjustment state to the cleaning state for removing foreign matter clogged in the small hole 22a, or when switching from the cleaning state to the flow rate adjustment state, the flow rate control section 23a where the small hole 22a is located and the fluid introduction part 2 with the opening 25a.
Since the fully closed part 24a between the valve body 6a and the valve body 6a always passes through the inflow chamber 7a, the flow of fluid from the inlet port 2a into the valve body 10a is temporarily stopped, resulting in a drastic change in the flow rate of the fluid. , there is a problem that a red water phenomenon occurs.

(Technical Problem) Therefore, the technical problem of this invention is to prevent the fully closed part from passing through the inflow chamber during the above switching.

(Technical Means) The technical means taken to solve the above-mentioned technical problem is to provide a flow control section in which a large number of tapered small holes with a larger diameter on the outer circumferential side are bored in the middle part of the valve body. The upper part on the communication chamber side from the flow rate control part is formed as a fluid introduction part having a plurality of openings larger than the small holes, and the lower part on the outflow chamber side from the flow rate control part is formed in the inflow chamber. is formed into a completely closed part with no holes that can be shut off, and when the lower end of the valve body comes into contact with the bottom wall of the outflow chamber, the fluid introduction part is located in the inflow chamber, and the flow rate control part is located in the outflow chamber. It is configured so that the

(Operation of technical means) As the valve body is constructed so that the upper part serves as the fluid introduction part, the middle part serves as the flow rate control part, and the lower part serves as the fully closed part, as described above, cleaning is possible from the flow rate adjustment state. In either case, when switching from the cleaning state to the flow adjustment state, the fully closed part no longer passes through the inlet chamber, thus eliminating the phenomenon of temporary suspension of fluid flow as in the past. doesn't happen.

(Special effect) Because the fluid does not stop temporarily as mentioned above,
It is possible to reliably prevent the red water phenomenon from occurring. In addition, in conventional models, the fully closed part is formed in the middle of the valve body, so the fully closed position of the valve body can be adjusted by, for example, touching the top end of the valve body to the top wall of the valve box or a separately provided stopper. However, according to the valve of this invention, the fully closed part is formed at the bottom of the valve body, so the fully closed position of the valve body can be determined by It becomes possible to securely determine the position by making use of contact with the upper wall of the valve box, etc.

(Example) Examples of this invention will be described below.

In FIG. 2, 1 is a valve box, and the inlet 2 of this valve box 1 is connected to an upstream pipe line, and the outlet port 3 is connected to a downstream pipe line. The inside of the valve box 1 is partitioned from above into a communication chamber 6, an inflow chamber 7, and an outflow chamber 8 by partition walls 4 and 5 fixed to the inner wall of the valve box at a predetermined interval in the vertical direction. A hollow cylindrical valve body 10 whose upper and lower ends are open is fitted into the three chambers 6, 7, and 8 so as to penetrate through the partition walls 4 and 5 and to be slidable in the vertical direction. The valve body 10 is formed as a flow rate control part 12 in which a large number of tapered small holes 11 with a larger diameter on the outer peripheral side are bored in the middle part of the peripheral wall, and a plurality of openings 13 larger than the small holes 11 in the upper part of the peripheral wall. It is formed as a fluid introduction part 14 with individual holes, and the lower part of the peripheral wall is formed as a completely closed part 15 with no holes that can shut off the inflow chamber 7.

Reference numeral 17 denotes a valve stem, the lower end of which is fixed to a rib 18 provided at the upper end of the valve body 10 by a mounting member 19 and a mounting pin 20. The upper end of the valve stem 17 passes through the upper cover 21 fixed to the valve case 1, and the male thread 22 formed on the upper part is screwed into the female thread 25 of the sleeve 24 arranged on the upper wall of the stand 23 fixed to the upper part of the upper cover 21. are doing. The sleeve 24 has a thrust ring 26 on its outer periphery protruding from the stand 23.
A handle 27 is fitted thereinto, a nut 28 is screwed thereto, and the stand 23 is rotatably supported. Reference numeral 30 denotes a rotation prevention member fixed to the valve stem 17 by means such as a key.The rotation prevention member 30 prevents rotation of the valve stem 17 by fitting a stop portion 31 into a vertical guide groove 32 provided on the opposing inner surface of the stand. is being prevented. On the other hand, a recess 33 is provided in the bottom wall of the outflow chamber in the valve box 1, and the lower end of the valve body 10 can be fitted into the recess 33. 34 is a lower lid fixed to the recess 33. And valve body 1
When the lower end of 0 is fitted into the recess 33, the introduction section 14 is connected to the inflow chamber 7, and the flow rate control section 12 is connected to the outflow chamber 8.
They are now located in different locations. In the partition walls 4 and 5, 36 and 37 are sealing members, in the upper and lower lids 21 and 34, 39, 40 and 41 are sealing members, and 42 is a presser plate for the sealing member.

Next, the operation of the above embodiment will be explained.

First, a case in which flow rate adjustment is performed will be explained. As shown in FIG. 2, the flow rate control section 1 of the valve body 10
From the fully open state where handle 2 is located in the inflow chamber 7,
When the valve body 10 is slid upward by rotating the valve 7, the opening number of the small hole 11 of the flow rate control section 12 located in the inflow chamber 7 gradually decreases, and the flow rate becomes small. On the other hand, when the handle 27 is rotated in the opposite direction from this reduced state and the valve body 10 is slid downward, the opening number of the small hole 11 gradually increases and the flow rate increases. The flow rate is adjusted by increasing or decreasing the opening number of the small holes 11 of the flow rate control section 12. Next, the case of cleaning the small hole 11 will be explained. Handle 2 as shown in Figure 3.
7 in the opposite direction to slide the valve body 10 downward and fit its lower end into the recess 33 to position the fluid introduction part 14 in the inflow chamber 7 and the flow rate control part 12 in the outflow chamber 8. . Then, the fluid from the inlet 2 is introduced into the valve body through the opening 13, and further flows from the inside of the valve body 10 through the small hole 11 to the outside of the valve body, and then flows through the outflow chamber 8. It flows out to the outlet 3, but when passing through the small hole 11, the small hole is cleaned and the small hole 11
Remove foreign objects stuck in the After removing the foreign matter, the valve body 10 is slid upward and the flow rate control unit 1 is again
2 in the inflow chamber 7, the same flow rate adjustment as described above becomes possible. Therefore, even when cleaning is performed to remove foreign matter after adjusting the flow rate, or when adjusting the flow rate after cleaning, the phenomenon of temporary stoppage of the flow as in the conventional case does not occur. Moreover, the above-mentioned operation can be performed only by vertically sliding the valve body 10, which simplifies the structure of the valve and facilitates its operation. To fully close the valve body 10, rotate the handle 27.
2 to position the fully closed part 15 in the inlet chamber 7 as shown by the chain line in FIG. This blocks the flow of fluid from the inlet 2, resulting in a fully closed state.

In the embodiment described above, when cleaning the small hole 11, the lower end of the valve body 10 was fitted into the recess 33, but this configuration is not necessarily required, and the lower end is simply inserted into the outflow chamber 8. It may be brought into contact with the bottom wall of the

[Brief explanation of the drawing]

FIG. 1 is a vertical side view of a conventional device, FIG. 2 is a vertical side view of an embodiment of the invention, and FIG. 3 is a vertical side view showing the same operating state. 1...Valve box, 2...Inflow port, 3...Outflow port,
4, 5... Partition wall, 6... Communication chamber, 7... Inflow chamber, 8... Outflow chamber, 10... Valve body, 11... Small hole, 12... Flow rate control section, 13... Opening, 14...
...Fluid introduction part, 15...Fully closed part.

Claims (1)

[Scope of utility model registration request] The interior of the valve box, which has an inlet on one side and an outlet on the other side, is communicated from above with an upper partition wall and a lower partition wall that are fixed horizontally to the inner wall of the valve box at a predetermined interval in the vertical direction. , a hollow cylindrical valve body partitioned into an inflow chamber having the inflow port and an outflow chamber having the outflow port, and having upper and lower ends open in the three chambers, is slidable vertically through both the partition walls. In the flow control valve fitted into the valve body, the middle part of the peripheral wall of the valve body is formed in a flow control part having a large number of tapered small holes with a larger diameter on the outer circumferential side, and communicates with the flow control part. The upper part on the chamber side is formed in a fluid introduction part having a plurality of openings larger than the small hole, and the lower part on the outflow chamber side from the flow rate control part is a completely closed part with no holes capable of blocking the inflow chamber. and is configured such that when the lower end of the valve body abuts the bottom wall of the outflow chamber, the fluid introduction part is located in the inflow chamber and the flow rate control part is located in the outflow chamber. Characteristic flow control valve.