JP2988494B2 - Through conduit valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to gas and liquid
The present invention relates to a shutoff valve that opens and closes a conduit through which powder flows.

[0002]

2. Description of the Related Art A through conduit valve is a type of a gate valve in which a valve element moves vertically with respect to a valve box port.
A valve configured to flow and shut off a fluid. That is, in this valve, the valve body is slid so that the opening of the valve body corresponds to the valve box port, the valve is fully opened and the fluid flows, and the closed part of the valve body is fully closed corresponding to the valve box port. To shut off fluid. To seal the fluid of this conventional through conduit valve, the valve box sheet retainer surrounds the valve box port and holds the valve box sheet, and a primary seal is attached to the valve box sheet to seal the fluid.

[0003]

However, in the above-mentioned conventional through conduit valve, powder or the like accumulated in the opening of the valve body when the valve body is fully opened stops at the opening of the valve body when fully closed. This powder or the like enters the gap of the valve box from the opening of the valve body and accumulates on the bottom of the valve box. For this reason, there has been a problem that powder and the like accumulate in the valve box and hinder opening and closing of the valve. Therefore, conventionally, an opening lid is provided at the lower part of the valve box,
When a certain amount of powder or the like has accumulated, the opening lid has been opened to remove the powder. However, such an operation is very troublesome, and when the number of valves is large, the operation is difficult.

The present invention has been made to solve such a conventional problem, and has as its object to provide a through conduit valve in which powder does not accumulate in a valve box.

[0005]

SUMMARY OF THE INVENTION A through conduit valve according to the present invention has an opening and a closing portion, and a fully open position in which the opening corresponds to a valve box port and a fully closed position in which the closing portion corresponds to a valve box port. A valve body movably provided over the valve body, a pair of valve box sheet retainers arranged in the valve box on the upstream side and the downstream side of the valve body to respectively hold a valve box sheet, and a valve provided on the valve box sheet. A primary seal that seals between the valve box seat and the valve body around the box port, and an opening of the valve body and the valve box port provided in the valve box seat retainer with the valve body in the fully closed position. A secondary seal is provided around the periphery to seal between the valve body and the valve box seat retainer.

[0006]

According to the present invention, when the opening of the valve body is in the fully closed position by the secondary seal provided on the valve box seat retainer,
It is possible to prevent powder or the like accumulated in the opening from entering the gap of the valve box.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a through conduit valve, and FIG. 2 is a front view of a valve box seat retainer viewed from a valve body side. The valve box 2 of the through conduit valve 1 has a U-shaped cross section, and an inlet 3 communicating with a pipe in the horizontal direction at the center of the side of the valve box 2 and an outlet 4 (however, the inlet 3 and the outlet The part 4 may be reversed.) And a lid 5 is provided on the upper part.
Is attached.

A valve body 6 is housed in the center of the valve box 2. A valve stem 7 is mounted on the upper part of the valve body 6, and a handle 8 is provided on the upper part of the valve stem 7. By operating the handle 8, the valve body 6 moves up and down. ing.

A pair of valve box seat retainers 9A and 9B are disposed on the upstream side and the downstream side of the valve body 6 so as to sandwich the valve body 6. The valve box seat retainers 9A and 9B are shown in FIG.
A through hole 10 is formed eccentric downward, and a fitting portion 11 is formed on the outer periphery of the through hole 10 so that the inlet 3 and the outlet 4 have valve box seat retainers 9A and 9B. Are formed so as to be attached from the inside of the valve box 2 respectively.
In addition, the inlet part 3, the outlet part 4, the through-hole 10, etc. are connected to form a valve box port 12.

The through holes 10 are formed inside the valve box seat retainers 9A and 9B.
A circular valve box sheet 13 is held on the outer periphery of the valve case. The method of holding the valve box sheet 13 is as follows.
14 is provided, and a spring 15 is fitted into the bottom of the fitting groove 14,
The spring 15 is fitted and held from above. Therefore,
The valve box sheet 13 is urged toward the valve 6. A first surface for sealing powder or the like on the peripheral surface of the valve box sheet 13 on the valve element 6 side.
The next seal 16 is fitted to seal between the valve box seat retainers 9A and 9B and the valve body 6.

An oval secondary seal 16 is further provided on the inner and outer peripheral portions of the valve box seat retainers 9A and 9B. The secondary seal 16 includes an opening 6A of the valve body 6 in a state where the valve body 6 is in the fully closed position, and the valve body 6 and the valve box seat retainers 9A and 9B so as to surround the periphery of the valve box port 12. Seal between

The operation of the above configuration will be described below. The valve element 6 moves between a fully open position where the opening 6A corresponds to the valve box port 12 and a fully closed position where the closing part 6B corresponds to the valve box port 12. FIG. 1 shows the fully closed position of the valve element 6, in which the powder or the like flowing into the inlet 3 is sealed by the primary seal 16. Then, by operating the handle 8 from the fully closed position of the valve body 6, the valve body 6 is pushed down, and the valve body 6 is moved to the fully open position with the opening 6A corresponding to the valve box port 12. As a result, powder or the like flows in from the inlet 3 and flows out to the outlet 4 through the valve box port 12. During that time, the powder and the like are sealed by the primary seal 16 so that the powder and the like do not enter the gap of the valve box 2.

When the valve body 6 is returned from the fully open position to the fully closed position in FIG. 1, powder and the like accumulate in the opening 6A of the valve body 6. In the case of a conventional through conduit valve, the powder accumulated in the opening 6A enters the gap of the valve box 2 because it is not sealed, and accumulates at the bottom of the valve box 2, and in the worst case, the accumulated powder. The valve body 6 does not operate with the powder. However, in the case of the present embodiment, the powder and the like in the opening 6A are sealed by the secondary seal 16 and do not enter the gap of the valve box 2. Therefore, the powder does not accumulate in the valve box 2, and it is possible to eliminate a malfunction due to the valve powder and the like.

[0014]

As described above, according to the present invention, the powder accumulated in the opening of the valve element by the secondary seal provided in the valve box seat retainer enters the gap of the valve box by the above configuration. Can be prevented, malfunction of the valve due to powder or the like can be prevented, and maintenance of the valve can be facilitated.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a through conduit valve according to an embodiment of the present invention.

FIG. 2 is a front view of a valve box seat retainer viewed from a valve body side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Through conduit valve 2 Valve box 6 Valve 6A Opening 6B Closed section 9A Valve box seat retainer 9B Valve box seat retainer 12 Valve box port 13 Valve box seat 16 Primary seal 17 Secondary seal

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-151675 (JP, A) JP-A-61-256075 (JP, A) Fully open Showa 61-70654 (JP, U) Really open Showa 62- 163665 (JP, U) Fully open 1987-163666 (JP, U) Fully open 1-146074 (JP, U) Fully open 55-89865 (JP, U) Fully open 60-45974 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F16K 3/00-3/36

Claims (1)

(57) [Claims] 1. A valve body having an opening and a closing part, wherein the valve body is movably provided between a fully open position in which the opening corresponds to the valve box port and a fully closed position in which the closing part corresponds to the valve box port. A pair of valve box sheet retainers arranged in the valve box on the upstream and downstream sides of the valve body and respectively holding the valve box sheet, and a valve box sheet and a valve body provided around the valve box port provided on the valve box sheet. A primary seal that seals the gap between the valve body and the valve box seat retainer around the opening of the valve body and the valve box port in a state where the valve body is provided in the valve box seat retainer and the valve body is in the fully closed position. A through conduit valve having a secondary seal to be sealed.