JPS6133340Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve cooling device for a gate valve.

In other words, in a gate valve configured to open and close by vertically moving a valve body in a valve box through which fluid flows, when the fluid is at a high temperature, the valve body can be efficiently cooled from inside with cooling water. To absorb heat from the corresponding parts on the valve body side and the seat side of the valve box, to prevent the occurrence of thermal expansion and distortion in those parts, and to maintain a highly accurate valve function, so that it can be carried out suitably. It is something.

Next, the embodiment shown in the drawings will be described.

Fig. 1 shows a front view of the entire gate valve.A lining 4 made of heat-resistant material is applied to the inner circumferential surface of the valve box A through which fluid flows, and a lining 4 of heat-resistant material is provided at the middle part of the valve box A. Both seats 1, 1 facing each other are formed, and a sealed valve storage case a is connected and extended from the periphery of both seats 1, 1 to the upper part of the valve box A, and the valve is inserted from inside the valve storage case a. Two guide rails 5, 5 are installed in parallel on both sides of the seats 1, 1 of the box A, and fixed integrally on both sides of each of the two valve bodies B, B, which are brought close to each other in parallel. The provided protrusions 7, 7 are slidably fitted into the grooves 5a, 5a of the guide rails 5, 5 on both sides, and the outer surfaces of both valve bodies B, B corresponding to the seats 1, 1 side are made of heat-resistant material. It is constructed by applying linings 3, 3 of.

Hydraulic or pneumatic fluid cylinders 6 are installed at the upper and lower ends of the four guide rails 5 and at the intermediate outer sides, respectively, and the tips of piston rods 6a extending from each fluid cylinder 6 are connected to the sides of the guide rails 5. The four guide rails 5 are installed so that they can be moved laterally by the three fluid cylinders 6, and the valve housing case a has an inlet 8 at the upper front. There are outlet ports 9 on both sides,
9 are respectively installed and fluid is supplied from the inlet 8, it can be press-fitted between the valve bodies B and B from inside the valve storage case a, and it can also be discharged from the discharge ports 9, 9. Cooling water or inert gas can also be supplied for cooling.

Both valve bodies B, B are each formed into a hollow shape, and two pipes 10, 11 for supporting and supplying and discharging cooling water are connected to the upper part of both valve bodies B, B. The inside of the pipe 10 forms a guide wall 12 that can guide the cooling water flowing in from the pipe 10 so that it circulates inside in a whirlpool shape and is discharged from the pipe 11. is slidably inserted into the upper part of the valve storage case a, and each pipe 10, 10,
The upper end portions of 11, 11 are connected to the support fitting 13.

Indicators 15 on both inner sides of the support frame 14 erected above the valve storage case a
The support metal fitting 13 is installed so that it can move up and down along the upper and lower parts of the indicator 15, and limit switches LS1 and LS2 that can be brought into contact with the contacts 16 and 16 on the sides of the support metal fitting 13 are installed. The lower end of the valve stem 19, which can be moved up and down by operating the handle 18 of the driver 17 installed above the valve 14, is connected to the support fitting 13, and the connectors 20, 20, 21,
The upper parts of the pipes 10, 10, 11, 11 are connected to 21, and the cooling water supply caps 22, 22 and the drain cap 2 are installed on the upper part of the support frame 14.
3, 23 and the connectors 20, 20, 21, 2
1 and flexible pull tubes 24, 24, 25,
25 to form a continuous connection. However, when the valve stem 19 is lowered while operating the handle 18,
Both valve bodies B, B are pushed down through the pipes 10, 10, and both valve bodies B, B descending along the guide rails 5, 5, 5, 5 are seated as shown in FIGS. 2 and 3. 1, 1 and the valve is closed.

In that case, if the fluid is high temperature, the supply nozzle 2
By supplying cooling water from 2 and 22, the cooling water is circulated in a whirlpool in both valve bodies B and B, and is drained from drain fittings 23 and 23 to drain both valve bodies B and B.
can be cooled, thereby allowing the valve body B,
Heat is absorbed from the seat 1, 1 side corresponding to B, preventing thermal expansion and distortion from occurring in that portion, and highly accurate valve function can be maintained. Also, when fluid is pressurized through the supply port 8, the fluid flows into the valve storage case a.
The fluid fills between the two valve bodies B, B, and the fluid pressure presses both the valve bodies B, B against the seat side to improve the sealing effect, and the fluid is discharged from the discharge ports 9, 9. Can be done. In addition, if cooling water or inert gas is supplied through the supply port 8, the valve bodies B, B can be cooled in the case of high temperatures, and the highly accurate valve function can be maintained as described above.

Furthermore, when the valves are closed, when each fluid cylinder 6 is actuated to pull each guide rail 5 outward, the valve bodies B, B that engage with the guide rail 5 are moved to the seat 1,
The valve bodies B and B are pressed against the 1 side, resulting in a high level of sealing accuracy.Also, when opening and closing the valve, if each fluid cylinder 6 is stopped and each guide rail 5 is placed on the inward side, the valve bodies B and B are This means that it can move up and down without touching the seats 1 and 1 side.

In this way, the present invention is a gate valve configured to open and close valve bodies B, B in orthogonal directions within a valve box A through which fluid flows, by vertically moving the valve bodies B, B, in which both cavity-shaped valve bodies B are close to each other and are parallel to each other. A flow path is provided inside the cavity of the valve body A by a guide wall 12, and the outer surface of the valve body B, B, which corresponds to the seats 1, 1 of the valve body A at the outermost periphery of the valve body A, is provided. The seats 1 and 1 are lined with heat-resistant material 3 and 3, respectively, and cooling water is circulated and drained inside the cavities of both valve bodies B and B that move up and down. Even if high-temperature fluid exists in the main pipeline, the heat-resistant material linings 3, 3 located on the seats 1, 1 side of the valve box A prevent heat from being directly transmitted to the valve bodies B, B. Even if the valve bodies B, B are cooled efficiently by circulation of internal cooling water, the outermost periphery of the valve bodies B, B corresponds to seats 1, 1 of the valve body A. There are no linings 3, 3 on the outer surface of the valve body, which absorbs heat from the seats 1, 1 of the corresponding valve box A, and prevents thermal expansion and distortion in that area. It has the advantage of being able to maintain a highly accurate valve function with good sealing performance and can be suitably implemented.

[Brief explanation of the drawing]

The drawings show an embodiment, and FIG. 1 is a front view of the entire gate valve, FIG. 2 is a central vertical sectional view of FIG. 1, FIG. 3 is an enlarged view of a part of FIG. 2, and FIG. FIG. 3 is a sectional view of the valve body taken along the - line in FIG. 2; A...Valve box, a...Valve storage case, B...Valve body, 1...Seat, 3...Lining, 6...Fluid cylinder, 10...Pipe, 11...Pipe, 14...Support frame , 16... contact, 20
……connector.

Claims (1)

[Scope of utility model registration request] In a gate valve that opens and closes by moving a valve body up and down along a guide rail disposed perpendicular to the fluid within the valve box, the guide rail is configured to be movable by a cylinder formed outwardly. The insides of the valve bodies disposed close to each other in parallel are each formed into a hollow shape to circulate cooling water therein, and
A valve cooling device for a gate valve, in which the seat side of the valve body is lined with a heat-resistant material except for the outer surface of the valve body that corresponds to the seat of the valve body at the outermost periphery of the valve body.