JP2544182B2 - Lift valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECT OF THE INVENTION "Industrial field of application" The present invention relates to a lift valve device provided with a flow path for automatic throttle adjustment interposed in a fluid transportation pipeline, and a variable constant flow rate adjustment convenient for planned water supply / distribution. With the effects of the valve device,
Even if the valve is increased in size, the operating power of the on-off valve is small, and there is no significant uneven flow or turbulence near the valve opening of the on-off valve. The purpose is to obtain a lift valve device that is also free from phenomena (including cavitation phenomenon).

 In addition, the term "water" in this specification is a general term for a fluid.

"Prior Art" Generally, when a valve device is used as a mere opening / closing valve, a structure such as a butterfly valve or a gate valve that does not cause an opening / closing operation seems to be sufficient. The shape of is generally irregular, and the flow passing through the valve opening tends to be uneven flow or turbulent flow.Therefore, a vibration phenomenon or a shock phenomenon is induced, causing rapid erosion or destruction of the valve main portion or There was a problem that it was accompanied by tremendous noise and vibration, and it was difficult to deal with it.

In exchange, the 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 will be unusable due to deviations in the pressure reception.

Therefore, conventionally, this type of valve is a double-seat lift valve to balance the axial thrust, and a single-seat lift valve is provided with a balance piston part integrated with the valve shaft to reduce the axial thrust. , Has been applied while adopting various methods.

[Problems to be Solved by the Invention] However, many problems still remain in the conventional lift valve device. First, as described above, in the high-pressure type and large-diameter type, the axial thrust reducing means has a disadvantage in that the manufacturing cost is unnecessarily increased because of a considerable structural disadvantage. Moreover, it is not easy to control the flow rate in the pipeline where the pressure fluctuates drastically.

In the present invention, due to the effect of the slow flow chamber c, damage to the vicinity of the shutoff valve portion (opening / closing valve portion) is eliminated, the turning power at all times is extremely small, and the flow rate control performance is structurally stable. The purpose is to obtain a convenient large lift valve device.

B. Configuration of the Invention "Means for Solving the Problems" The main points of the means for solving the problems of the present invention have been described above, but the present invention will be further described based on the drawings of one embodiment.

In FIG. 1, a shut-off valve seat 3 and a shut-off valve 7 corresponding to the shut-off valve seat 3 are provided in a valve box including a valve box 1 having an artificial flow path a and an outlet flow path f, and a slide valve side valve box lid 2. Is formed between the slide valve valve seat 4 and the corresponding slide valve tubular member 11 and a slide valve valve opening d is formed between the slide valve valve seat 4 and the corresponding tubular member 11 of the slide valve. The slow flow chamber c is configured so as to be sandwiched between the valve opening b and the valve opening d.

Further, the bag chamber g formed between the slide valve 10 and the slide valve side valve box lid 2 via the seal member 14 is communicated with the artificial flow path a by the communication passage 17, and the balance spring 13 is also provided. Is installed, an automatic throttle control flow path is formed at the slide valve opening d. The pressure receiving areas of the shutoff valve 7 and the slide valve 10 are made substantially equal, and at the time of the shutoff or just before the shutoff, both valve body parts are brought into contact with and integrated with each other to balance the axial thrust and at the same time for the shutoff valve operation. The structure is basically free from the turning force of the handle 15.

It should be noted that FIG. 1 shows an embodiment of a product in which a shutoff valve opening / closing screw member 16 is provided in the lower portion of the valve box to facilitate disassembly and inspection of the valve device at a facility site.

Although the embodiment shown in FIG. 3 lacks the convenience of overhauling by closing the shutoff valve on the upstream side, it has an external screw type structure which is preferably adopted for general valves. In this case, as in the embodiment shown in FIG. 1, the valve shaft is rotated up and down by the handle to open and close the shutoff valve, and
By turning the handle 55, the shut-off valve 47 together with the valve shaft 46
Is a structure for opening and closing by moving up and down. Similar to FIG. 1, at the time of shutoff, the shutoff valve 47 and the slide valve 50 contact each other through the intermediate ring washer 49 and are integrated with the valve shaft 46, so that the steering force is balanced by the balance of the axial thrust. Is obvious.

[Operation] When the action is observed in FIG. 1, the shutoff valve 7 is now in the fully opened state, and therefore, the flow is maintained at a predetermined maximum flow rate, and the artificial flow path a → the shutoff valve opening. b → gentle flow chamber c
→ Sliding valve valve opening d → outlet flow passage e → outlet flow passage f in this order.

In this state, the slide valve valve opening d of the balance spring 13
The force in the opening direction is balanced with the pressure difference between the bag chamber g, that is, the artificial flow channel a, and the pressure in the slow flow chamber c, which act on the pressure-receiving surfaces before and after the slide valve 10. This is due to the flow path resistance at b.

Next, when the shutoff valve 7 is brought closer to the valve seat 3 for flow rate control, the pressure in the slow flow chamber c decreases as the resistance of the shutoff valve opening b naturally increases, and the balance by the balance spring 13 is broken. The end portion 11m of the tubular member 11 of the slide valve is the slide valve seat 4
4m of the valve seat surface of, and becomes an automatic throttle control flow path corresponding to the opening degree of the shutoff valve and becomes stable (that is, it exhibits a constant flow rate function). In these states, the bias pressure acting downstream of the shutoff valve 7, that is, upward in the drawing, is a slight flow resistance at the shutoff valve opening b, so there is no practical problem.

Furthermore, when the shut-off valve 7 is on the verge of shut-off, as is apparent from FIG. 1, the end edge portion 11m of the tubular member 11 of the slide valve,
While leaving a gap between the sliding valve seat 4 and the valve seat surface 4m,
The shutoff valve boss portion 8 and the sliding valve boss portion 12 are preferentially abutted and integrated via the intermediate ring washer 9 to form a shape that surrounds the valve shaft collar portion 6p without hugging, and the shaft according to the present invention It forms a thrust balancing means and is basically free from the turning power of the shut-off valve operating handle 15. Due to these actions, the steering operation is light to the idling wind throughout the entire stroke.

Therefore, in combination with the excellent constant flow rate characteristic of the lift valve device according to the present invention, it has excellent effects in each industrial field such as reduction of power for valve operation and durability of main screw portions.

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

In FIG. 1, a shut-off valve opening / closing screw member 16 is provided at the bottom of the valve box so that water on the primary side, that is, the upstream side is shut off by a shut-off valve 7 so that the main part of the valve device can be easily disassembled and inspected. I showed you Therefore, although the valve shaft 6 rotates together with the handle 15, the present valve device enters the shut-off stroke, and both valve bodies of the pressure receiving portion abut and integrate at the boss portions 8 and 12 via the intermediate ring washer 9. At that time, the thrust in the axial direction is balanced, and at the same time, the valve body portion is configured to be free from the turning force of the valve shaft 6.

In FIG. 2, a shutoff valve opening / closing screw member 36 is provided near the handle 35 to simplify the sliding valve portion. The valve actuation is similar to that of FIG.

The structure of the valve box and each valve body of Fig. 3 is almost the same as that of Fig. 1, but the external screw method is applied and the shutoff valve opening / closing screw member 55s is on the handle 55, so the key Structure 56k
Combined with the action of, the valve shaft 46 does not rotate but only moves up and down. Therefore, the shutoff valve boss portion 48 and the slide valve boss portion 52 are
The intermediate ring washer 49 and the valve shaft collar portion 46p contact each other, and the valve shaft 46
Even if they are integrated with each other, the thrust in the axial direction is balanced in the vertical direction, so that the turning force of the handle 55 is free, and the same light steering operation as in FIG. 1 can be realized.

Although the intermediate ring washer 49 is left in the drawing, it is needless to say that the intermediate ring washer 49 can be omitted and used as the valve shaft flange portion 46p. Further, 45w shows an example of a support plate for preventing the diaphragm member from being pressure-bonded to the partition member 45 due to high pressure when a diaphragm plate is applied to the seal member 54. Further, although the serrated flow path portion 44t is shown in the slide valve valve seat 44, it shows an application example of flow path improving means for reducing cavitation, which is often used especially for large valve devices. .

Further, in the lift valve device according to the present invention, it is said that the sliding valve opens and automatically performs the cleaning action at the time when the clogging occurs in the sliding valve opening d that serves as the automatic throttle control passage. There are outstanding advantages that deserve special mention.

C. As described above, the lift valve device according to the present invention makes use of the advantages of the lift valve device and at the same time alleviates the drawbacks of the various valve devices of the related art due to the increase in size. For example, even in the case of remote frontiers where the power source cannot be taken, it is possible to easily employ a solar system with low power consumption, further, there is no vibration or shock, no clogging, etc. It shows the excellent effect of the above and shows great results in water management.

[Brief description of drawings]

The drawings are longitudinal sectional views of one embodiment of the present invention, in each of FIG. 1, FIG. 2, and FIG. In each drawing, 1; 21; 41 …… Valve box, 2; 22; 42 …… Sliding valve side valve box lid, 3; 23; 43 …… Cutoff valve seat, 4; 24; 44 …… Sliding valve valve Seat, 4m; 24m; 44m …… Valve seat surface, 44t …… Sawtooth channel section, 5; 25; 45 …… Separator member, 45w …… Diaphragm support plate, 6; 26; 46 …… Valve shaft, 6s ; 26s; 46s …… Valve shaft screw part, 6p; 26p; 46p …… Valve shaft collar part, 7; 27; 47 …… Shutoff valve, 8; 28; 48 …… Shutoff valve boss part, 9; 29; 49 ...... Intermediate ring washer, 9i; 29i; 49i …… End face, 10; 30; 50 …… Slide valve, 11; 31; 51 …… Cylindrical member, 11m; 31m; 51m …… Cylindrical member edge, 12; 32; 52 …… Slip valve boss, 12i; 32i; 52i …… End of boss, 13; 33; 53 …… Balance spring, 14; 34; 54 …… Seal member, 15; 35; 55 …… Handle, 55s ...... Shutoff valve opening / closing screw member, 16; 36 ...... Shutoff valve opening / closing screw member, 56 ...... Grooved bush, 56k ...... Key groove part, 17; 37; 57 ...... Communication passage. a: inlet flow path, b: shutoff valve valve opening, c: slow flow chamber,
d ... Sliding valve valve opening, e ... Exit collecting flow path, f ... Exit flow path, g ... Bag chamber.

 ─────────────────────────────────────────────────── ─── Continuation of front page Jury Chairman Yoshio Kimura Judge Judge Haruo Hayashi Judge Toshiharu Yamagishi (56) References

Claims (1)

(57) [Claims] 1. A shutoff valve (7; 27; 47) in a valve box (1; 21; 41).
A slide valve (10; 30; 50) is provided opposite to, and a tubular member (11; 31; 51) of the slide valve is inserted through a seal member (14; 34; 54) to a partition member of the valve box. (5; 25; 45) is slidably and slidably fitted on the tubular member (11; 31; 51) and the sliding valve seat (4; 24; 44) corresponding thereto. A valve valve opening (d) is formed, the slide valve (10; 30; 50) and the slide valve seat (4; 24; 4).
4) Or between the shutoff valve (7; 27; 47), the valve opening (d)
A balance spring (13; 33; 53) that acts in the direction that always opens the valve is installed, and between the slide valve (10; 30; 50) and the slide valve side valve box cover (2; 22; 42). A lift valve device in which the enclosed bag chamber (g) is communicated with the artificial flow path (a) by a communication path (17; 37; 57), and an automatic throttle control flow path is formed in the valve opening (d). In, the pressure receiving area of the cutoff valve (7; 27; 47) and the pressure receiving area of the slide valve (10; 30; 50) are formed to be almost equal, and the cutoff valve (7; 27; 47) is just before the cutoff. When operated to approach the shutoff valve seat (3; 23; 43), the shutoff valve boss (8; 28; 48) and the slide valve boss (12; 32; 52) directly or in the middle The valve washer (9; 29; 49) is preferentially abutted and integrated via a ring washer (9; 29; 49) so as not to apply axial thrust to the valve shaft (6; 26; 46) and to operate the shutoff valve (15; 35; 55) Lift valve characterized by being configured to be free from the turning power apparatus.