JPS6131075Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve device, and more particularly to a valve device that can be incorporated into piping for flowing cement compositions, other fluids, slurries, and the like.

A typical method for placing concrete underwater is a method using tremie pipes. It has a funnel at the top end and an open bore at the bottom end.
This is a method of pouring concrete by guiding the concrete to the place under water using a steel pipe called a tremie pipe of about 30 cm.

When placing concrete using the concrete method, if the concrete is simply poured into the tremie pipe, the concrete will separate due to water entering the tremie pipe, and the concrete will not serve its purpose. Before pouring concrete, a sponge or plunger is placed in the tremie pipe to cut off contact between the concrete and water, and the plug is plugged.Concrete is poured on top of this, and the sponge or plunger, which descends due to the weight of the concrete, is placed at the bottom end of the tremie pipe. I'm trying to drain it from there.

However, when plugging with a sponge or plunger, there is no valve device to prevent concrete from flowing out even if the tremie pipe is carried to another location and concrete is poured after completion of pouring at one location. As a result, the tremie pipe cannot be transported and the scope of construction is limited.

A rigid outer tube with a large number of through holes in the side wall, a flexible inner tube housed within the outer tube, and an opening/closing device provided at the lower end of the inner tube that can open the inner tube underwater. A tremie tube equipped with
140307), the above problem can be solved. However, in this tremie pipe, the inner pipe is constantly constricted by the action of water pressure, so the inner pipe is worn away by the concrete, resulting in low durability of the inner pipe. Further, the opening/closing device has a structure in which the inner tube is held between a pair of plates, and it is difficult to seal the inner tube with a uniform pressing force over the longitudinal direction of the plates.

Therefore, an object of the present invention is to provide a valve device that can improve durability and sealing performance and can be applied to concrete and other fluids.

The present invention is a valve device that communicates with and shuts off a first pipe and a second pipe that are arranged at an interval in the axial direction, the valve device being arranged over the interval and connecting the first and second pipes. a cylindrical elastic body fixed to each of the first and second tubes; a coupling ring disposed radially outward of the elastic body with a space therebetween and locked to the first and second tubes at both ends; a bendable and extensible member disposed within the space to narrow the elastic body;
and means for bending the member.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG.
2 and the second pipe 14 are provided to communicate with each other and to cut off communication between the pipe 14 and the second pipe 14. The first tube 12 and the second tube 14 are arranged with a distance L between them in the axial direction. In the example shown in FIG. 1, the lower part of the second tube 14 is a free end,
No other pipe is connected to this pipe 14, and the second pipe 14
is moved toward the first tube 12 as described below, and the distance L in this case is the distance before the second tube 14 is moved.

The valve device 10 includes an elastic body 16 and a coupling 18.
, a bendable and extensible member 20, and means 22 for bending this member 20.

The first pipe 12 and the second pipe 14 are formed of cylindrical steel pipes having the same diameter. first tube 12
is, for example, the tremie tube itself or a tube connected to the tremie tube. Both tubes 12, 14 are provided with thick mounting portions 24 extending radially outward at opposite ends thereof.This mounting portion 24 has an inclined surface 26 tapering toward the open end. It has a cylindrical portion 27 surrounding this inclined surface 26.

The elastic body 16 is made of rubber or flexible plastic and has a cylindrical shape. In the illustrated example, the inner diameter of the elastic body 16 is equal to the inner diameter of the first and second tubes 12,14. As a result, flow loss at the portion of the elastic body 16 is reduced, and wear of the elastic body 16 can be reduced. The elastic body 16 is arranged over the distance L, and both ends thereof are applied to the inclined surfaces 26 of the attachment parts 24 of the first and second tubes, and the elastic bodies 16
An annular fixing ring 28 is press-fitted into the cylindrical portion 27 of
Each end of the elastic body 16 has an inclined surface 26 and a fixing ring 2.
It is held between 8 and 8.

The coupling ring 18 includes a first member 30 and a second member 32, each of which is cylindrical in shape. The coupling ring 18 is arranged radially outwardly of the elastic body 16 with a space 33 in between. In the illustrated example, each member of the coupling ring 18 has a thick locking portion 34 extending radially inward at one end facing the pipe, and a thick locking portion 34 extending radially inward at the other end. Each locking portion 34 is locked to the outside in the axial direction of the mounting portion 24 of the opposing pipe, and a nut 38 is screwed into a bolt 36 passing through both flanges 35. , both members 30 and 32 are coupled, and a space 33 is formed between a pair of opposing mounting portions 2.
4.

The bendable member 20 is arranged within the space 33 to constrict the elastic body 16. As shown in FIG. 2, this member 20 consists of two substantially triangular links 40, 42 made of a highly rigid material such as steel. An eye 43 is provided at the apex portion of the link body 42, the apex portion 41 of the other link body 40 is rotatably penetrated by the eye 43, and both link bodies 40, 42 are pivotally connected at the apex portion. ing. Both link bodies 40 and 42 are arranged so that the apex portions are spaced apart from the opposite sides A and B of the apex portions in the axial direction of the elastic body 16. This configuration of the bendable and extensible member 20 makes it easier to squeeze the elastic body 16.

A plurality of bendable and extensible members 20 are provided, and as shown in FIG. 3, they are arranged in the circumferential direction. Link body 4
0 and 42 are such that when a plurality of link bodies arranged in the circumferential direction are bent inward as shown in FIG. 4, they do not interfere with each other and are located inward at this time. The apex portion is formed so as to narrow the elastic body 16 without any gap.

The free length L ₁ of the bendable and extensible member 20 is the distance L between the opposing attachment parts 24 of the two pipes 12 and 14.
Formed slightly larger. Then, the member 20 including the pair of link bodies 40 and 42 is arranged within the interval formed by the pair of attachment parts 24, the lower link body 42 is brought into contact with the lower attachment part 24, and the upper link body 40 is brought into contact with the upper link body 40. When brought into contact with the mounting portions 24 of the link bodies, both link bodies are restrained by both mounting portions, and as a result, the apex portions are held in a state slightly protruding inward in the radial direction, as shown in Fig. 1. . At this time, it is preferable to determine the size of the link body so that the vertex portion contacts the elastic body 16 and receives a slight force directed outward in the radial direction from the elastic body 16. As a result, the pair of link bodies 40 and 42 are positioned by the pair of attachment parts 24 and the elastic body 16. Although it is preferable that the two link bodies 40 and 42 are swingably fixed to the mounting portion 24 on each side, in the above configuration,
This fixation is not absolutely necessary.

The bendable and extensible member 48 shown in FIG. 5 consists of two link bodies 40, 42 and a rod 50 pivotally attached to the apex portions of both links. Since the bendable and extensible member includes the rod 50, as shown on the right side of the figure, when the elastic body 16 is squeezed, the elastic body can be brought into close contact over the length _L2 in the axial direction, thereby preventing the fluid from flowing. The blocking effect increases.

The means 22 for bending the bendable member is a hydraulic jack. As shown in FIG. 1, there are four grooves 5 (only two shown in the figure) extending in the axial direction in the locking portion 34 of the first member 30 of the coupling ring 18.
2 are opened, and a hydraulic jack is arranged in each groove 52, the cylinder of which is pivotally connected to the stop 34, and the piston rod of which is pivotally connected to the attachment part 24 of the first tube 12. As a result, when the piping 54 connected to the hydraulic jack is connected to a pump on a work boat (not shown) or the like above and pressure fluid is supplied to the hydraulic jack, the piston rod expands and the coupling 18 and the second pipe are connected. 14 and rise. As a result of this rise, as shown in FIG. The pipe 14 of No. 2 is cut off. When the supply of pressure fluid to the hydraulic jack is cut off, coupling 1
8 and the second tube 14 descend, and the bendable member 2
0 is pushed out by the elastic force of the elastic body 16, or when the bendable member 20 is fixed to the mounting part 24 at the top and bottom, it is stretched by the mounting part 24 and returns to the state shown in FIG.

In the example above, the second tube 14 is movable.
Therefore, it can be applied to cases where the valve device 10 is attached to the lowermost end of a tremie tube. Alternatively, if the second tube 14 is fixed, or both tubes 12,
If 14 is installed horizontally, the second tube 14
Instead of moving the member 20, the member 20 can be bent by configuring one or both of the link bodies 40, 42 of the bendable and extensible member 20 to be pushed in with a hydraulic jack.

According to the present invention, since the elastic body opens the road when the fluid is flowing, wear of the elastic body can be reduced. Moreover, since the elastic body is sealed by squeezing the elastic body from the periphery using a bendable and extensible member, the airtightness can be improved.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the valve device according to the present invention, Figure 2 is a front view of the bendable member, and Figures 3 and 4 are sectional views taken along line 3-3 in Figure 1. ,
Figure 3 shows the elastic body in an open state, Figure 4 shows the elastic body in a closed state, and Figure 5 is a sectional view showing another example of the valve device, with the left half showing the bendable member in the open state. The right half shows the closed state, and FIG. 6 is a cross-sectional view showing the state in which the valve device of FIG. 1 shuts off the pipe. 10; Valve device, 12, 14; Pipe, 16; Elastic body, 18; Coupling, 20, 48; Flexible member, 40, 42; Link body, 50; Rod body.

Claims (1)

[Claims for Utility Model Registration] (1) A valve device for communicating with and shutting off first pipes arranged at intervals in an axial direction, the valve device being arranged over said intervals, said first pipes and a cylindrical elastic body fixed to the second tube, respectively, and arranged with a space radially outward of the elastic body,
a coupling ring that is respectively locked to the first and second tubes at both ends thereof; and a bendable and extensible member disposed within the space to squeeze the elastic body;
and means for bending the member. (2) The first and second tubes and the elastic body have the same inner diameter.
The valve device described in paragraph (1). (3) The bendable and extensible member is two substantially triangular links that are pivotally connected to each other at their apex portions, and the apex portions extend from the opposite side of the apex portion in the axial direction of the elastic body. The valve device according to claim (1) of the utility model registration, comprising two link bodies arranged at a distance from each other, and a plurality of bendable and extensible members arranged in the circumferential direction. (4) The valve device according to claim (3) of the utility model registration, wherein the apex portions of the two link bodies are pivotally connected via a rod extending in the axial direction. (5) The valve device according to claim 1, wherein the coupling ring is movable in the axial direction, and the bendable member is bent by the movement of the coupling ring.