JPH07101067B2 - Lift type control valve device with automatic constant flow rate adjustment - Google Patents

Description

Detailed Description of the Invention a. OBJECT OF THE INVENTION "Industrial field of use" The present invention relates to a lift type control valve device which is provided in a fluid transportation pipeline and has a function of automatic constant flow rate adjustment.

"Prior Art" Generally, when the valve device is used for a flow control valve,
When there is little fluctuation in water pressure on the primary side or secondary side of the pipeline and there is no need to take care of the accuracy of flow rate adjustment, it is sufficient to adjust the butterfly valve, gate valve, cocks, etc. to an appropriate throttle.

However, when the pipe line conditions become complicated, or when precision is required for flow rate adjustment, the valve device changes in a complicated manner, and the main valve may be changed by a pilot type control device or a combination of various actuators and sensors. You are forced to install an automatic control device.

Therefore, in the field of conventional valve devices of this kind, it has come to be seen a compact, lift-type flow control valve which is versatile and adaptable, which is based on the technical idea aiming at a simple theory and a simple structure. This is not the case.

[Problems to be Solved by the Invention] As described above, the conventional flow rate control valve device, in the field of the valve device whose price is relatively high, sees a product having an operation and performance suitable for the purpose of use. You can However, for a relatively small valve device, under the conventional technical concept of this type, a lift type flow control valve having a simple and inexpensive structure and also having a function of a variable automatic bottom flow rate control suitable for various purposes. There was no reason to create.

This invention, based on a simple theory,
The purpose of the invention is to obtain an automatic constant flow rate adjustment lift type control valve device that is configured as an integrated structure that is a simple combination that does not bulky with the manufacturing cost, and that exerts a function suitable for use and management. To do.

B. Structure of the Invention "Means for Solving the Problems" The invention will be described based on an embodiment shown in FIG.
In a valve box 1 having an inlet diameter section flow path a and an outlet diameter section flow path g having the same center straight line X, the inside of the inlet flow path b formed by the partition wall section 11 is closed along the flow direction. A lift type flow rate control valve 5 is installed,
A lift-type slide valve 7 is provided in the corresponding outlet flow path f via the adjusting opening c and the valve seat 12 and tightens against the flow direction.

Further, in each of the main part structures, the central straight line Y shared by them is formed so as to be substantially orthogonal to the above-mentioned central straight line X in the central portion of the valve box, and the fitting with the upper lid 2 in the valve box 1 is performed. Structure suitable for concentric machining and assembling means for a series of the constituent parts such as the valve box cylinder part 13 for sealingly and slidably fitting the part 14, the valve seat part 12, and the slide valve 7 Is configured.

Now, the threaded portion 15s of the bearing member 15 of the upper lid 2 has a threaded portion 4
The valve adjusting knob 4 is appropriately screwed by s, and the screw portion 4t in the opposite direction to the screw portion 4s on the knob 4 has a screw portion.
The valve shaft member 6 is screwed by 6t. The lower part of the bearing member 15 is provided with a slitting portion 16 as a rotation stopping means, and a rotation stopping pin 17 is set on the valve shaft member 6, so that the knob 4 can be rotated in a single range. If rotated, the scale plate shown in FIGS. 3 (A) and 3 (B)
The flow control valve 5 is vertically opened and closed while tracing the pointer 19 with the pointer 19.

Also, the required balance spring 9 is provided in the intermediate flow path d and in the hollow chamber portion of the slide valve 7 so that the flow rate control valve 5 and the slide valve 7 are provided.
The bag chamber h interposed between the end face member 7h and the valve box bottom wall member 3 is connected to the inlet flow path b by a short-circuit flow path m such as a casting hole. Then, the function of a simple automatic throttle adjusting passage is added to the slide valve opening e.

The abutment member 8 prevents the valve 7 from overshooting when the flow control valve 5 is shut off, that is, when the sliding valve 7 is closed, and because of the abutment, the two members (5 and 7) are integrated. Valve adjustment knob 4 depending on the balance of pressure acting up and down
It plays an important role not to load useless turning power on the, and its effect is remarkable.

Further, the seal member 10 provided at the bottom of the valve box is not always necessary when the present invention and the valve device are used only in the range of constant flow rate adjustment, but is effective in the case of strict valve shutoff. is there. Of course, it has a structure in which a seal member such as an O-ring and a bellowram, which are known in the prior art, can be widely used.

Further, the embodiment shown in FIG. 2 is almost the same as that shown in FIG. 1, but is a relatively large product, the valve box portion of which is cast iron and the main portion of which is finished with a corrosion resistant material or the like. Was illustrated. Due to the size of the valve lift, if the cylindrical scale plate of the opening meter is a spiral scale as shown in FIG. 3 (C), a more precise opening is indicated.

Therefore, according to the implementation of the present invention, with a simple component configuration,
Since the manufacturing cost is low and the simple assembling method, maintenance and inspection are not bothersome, and the function of automatic constant flow rate adjustment lift type control valve device can be sent to the market of those skilled in the art. is there.

[Operation] When the operation is observed according to FIG. 1, the lift-type flow rate control valve 5 is now in the fully opened state, and therefore, the flow is maintained at a predetermined maximum flow rate, while the inlet flow passage a → the inlet flow. Path b → flow rate control opening c → intermediate flow path d → slide valve opening e
→ The outlet flow path f → the outlet caliber flow path g flow in this order. Under this state, the force of the counterbalancing spring 9 in the direction of opening the slide valve opening e causes a difference in pressure between the intermediate flow passage d and the bag chamber h, that is, the inlet flow passage b, which act on the pressure receiving surfaces before and after the end surface member 7h. Is balanced. Not only the pressure difference but also the flow path resistance at the flow control opening c.

Next, in order to adjust the flow rate, the valve adjustment knob 4 is rotated and
When the opening c is narrowed down by the flow rate control valve 5, the flow passage resistance naturally increases, so the pressure in the flow passage d on the downstream side decreases, and the balance by the spring 7 is broken, and at the same time, the tip of the slide valve. The portion approaches the closed surface portion, and the opening portion e becomes an automatic throttle adjusting passage that is commensurate with the flow state and becomes stable.

It should be noted that when the flow control valve 5 is shut off, that is, when the sliding valve 7 is completely closed, the contact member 8 of the valve 7 is projected on the tip end surface of the flow control valve 5 to prevent unnecessary overtravel. At the same time, the pressures above and below the integrated valves (5 and 7) are balanced so that no extra force is required to operate the valve adjustment knob 4.

Then, as illustrated in FIGS. 3A and 3B,
In the range around the valve adjustment knob 4, the advantage of guiding a highly accurate scale is exhibited.

[Examples] Examples of the present invention will be specifically described with reference to the drawings.

FIG. 1 shows a valve box 1 with a flanged inlet port and outlet port aligned on a center straight line X, and a slide valve 5 from the upper side.
Is inserted, a balance spring 9 is fitted thereinto, a valve shaft member 6 supporting the flow rate adjusting valve 5 and a valve adjusting knob 4 are screwed in a complex manner, and an upper lid 2 having a rotation stopping means is covered. ,
The lift type control valve device with automatic bottom flow rate adjustment is shown, in which the knob 4 can be rotated as required to freely select the flow rate value.

In addition, 10 is a diaphragm applied as a sealing member.

FIG. 2 shows an automatic constant flow rate adjusting lift type control valve device having a rich function for a comparatively large-sized example product in which a corrosion resistant material is applied to a main part.

A product having a highly accurate opening such as a scale plate illustrated in FIG. 3 (C) can be made, which is very convenient in use.

C. As described above, the lift type flow control valve device according to the embodiment of the present invention is compact, simple, and structured as compared with the conventional various flow control valve devices, and the manufacturing cost is low, which is simple. Since it is a built-in means, maintenance is not required, and it is a convenient product that exhibits rich automatic constant flow rate adjustment function in use.

Further, since the required power for valve operation as a variable flow rate control valve that can be freely changed is extremely small, it can be economically incorporated into a device for automatic operation, remote unmanned operation, and the like, which is highly effective.

[Brief description of drawings]

1 and 2 are vertical sectional views showing an embodiment of the present invention. In FIG. 3, (A) is a bird's eye view showing the relationship between the cylindrical scale plate 18 and the fixed pointer 19 in the embodiment of FIG. 1, and (B) is the scale plate developed. An example is given. (C) shows an example of developing the scale plate in the embodiment of FIG. In the drawing, 1,21 …… Valve box, 2,22 …… Top lid, 3,23 …… Bottom wall member, 4,
24 …… Valve adjustment knob, 5,25 …… Flow control valve, 6,26 …… Valve shaft member, 7,27 …… Sliding valve, 8,28 …… Abutting member, 9,29 ……
Balance spring, 10,30 …… Seal member, 11,31 …… Valve box bulkhead, 12,32 …… Valve seat, 13,33 …… Valve box cylinder, 1
4,34 …… Valve box fitting part, 15,35 …… Bearing member, 16,36 ……
Sliding part, 17,37 …… Rotation stop pin, 18,38 …… Cylindrical scale plate, 19,39 …… Pointer, 4s, 24s …… Valve adjustment knob screw, 4t, 24t …… Valve adjustment Knob reverse screw part, 6t, 26t ……
Reverse valve shaft thread, 7h, 27h ... Slip valve end face member, a ... Inlet diameter passage, b ... Inlet passage, c ... Flow control opening,
d ... Intermediate flow passage, e ... Sliding valve opening, f ... Outlet passage, g ... Outlet diameter passage, h ... Bag chamber, m ... Short-circuit passage.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 51-111531 (JP, U) JP 57-57729 (JP, B2) JP 61-49539 (JP, B2) JP 57- 37796 (JP, B2)

Claims (2)

[Claims] 1. In a flow rate control valve device, an inlet diameter channel (a) and an outlet diameter channel (g) of a valve box (1, 21) are aligned on the same channel center straight line X, Lift type flow control valve (5,25) and control opening (c) provided in the inlet flow path (b)
And the lift type slide valve (7, 27) and the slide valve opening (e) provided correspondingly in the outlet flow path (f) share a central straight line Y, The valve box partition (11, 31) is formed so as to be substantially orthogonal to X, and in the tubular inner chamber of the slide valve (7, 27), the end face member (7h, 7h) of the slide valve (7, 27) is formed. The slide valve (7,27) is installed between the inner surface of (27h) and the end surface (5p, 32p) of the flow control valve or valve seat facing it.
The opening (e) of the slide valve is always provided with a counterbalancing spring (9, 29) that acts in the direction of opening with a predetermined force, and the end face members (7h, 27h) of the slide valve and the valve box constant wall member (3). , 23), and the bag chamber (h) formed between the
By making the opening (e) to form an automatic throttle adjusting flow path by communicating with the inlet flow path (b), and by operating the flow path adjusting valve (5, 25) to just before the deadline, When the valve body is brought close to the valve seat portion (12, 32), the tip end portion of the valve body and the tip end portion of the contact member (8, 28) provided on the slide valve are preferentially contacted, and at the same time, An automatic flow control valve (5,25) characterized in that the total downstream load is basically free from the turning force of the valve adjustment knobs (4,24). Constant flow rate adjustable lift type control valve device. 2. A valve shaft member (6,26) fitted with a flow rate control valve (5,25) and a bearing member (15,25) provided on an upper lid (2,22) of a valve box (1,21). 35) and a structure in which a rotation stopping means is provided, and at the same time, the adjusting knobs (4, 24) of the flow rate adjusting valve (5, 25), the bearing member (15, 35) and the valve shaft member (6). , 2
6. An automatic constant flow rate adjusting lift type control valve device according to claim 1, characterized in that a screwing means that operates with a compound pitch by screw parts in mutually opposite directions is provided between the above and 6). .