JPH0254462B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an on-off valve that opens and closes a flow path using a disk that pivots across the flow path, and more specifically, relates to an on-off valve that opens and closes a flow path using a disk that pivots across the flow path. The present invention relates to an on-off valve that opens and closes a flow path by means of a disk that slides in a rotating manner between inner facing surfaces having a seat ring.

[Conventional technology]

Conventionally, various types of on-off valves of this type have existed from the viewpoint of improving sealing performance, dealing with the characteristics of the target fluid, or improving the mechanism for the purpose of improving the on-off function. Little effort had been made to the compactness of the overall structure, ease of assembly and disassembly, and ease of transport and installation to the installation site.

[Problem that the invention seeks to solve]

Incidentally, recently, garbage disposal systems have been developed in which vacuum collection and transportation is carried out by directly connecting the dust chute or garbage inlet of an apartment complex or building, etc., to a garbage disposal site using a transportation pipe buried underground. When installing a shut-off valve in an underground trench, there are restrictions on installation and work space in underground trenches, and the situation becomes even more cramped when pipes for other purposes coexist, so it is desirable that the shut-off valve body be as compact as possible. In addition, the drive device must be transported separately.
They wanted a design that could be easily assembled on site. In addition, many of them are relatively difficult or complicated to disassemble, and a more compact structure has been desired in terms of adjustment and maintenance.

Therefore, the purpose of this invention is to make the overall structure easy to disassemble and reassemble without impairing the original opening/closing function, to be compact, to be able to be transported separately from the drive device, and to be mechanically simple and easy to maintain. The purpose is to provide an on-off valve that can be easily opened and closed.

[Means for solving problems]

This invention is not constrained by the conventional orientation of technical improvement that focuses only on opening/closing functions or performance, but is intended to make the overall structure more compact and to facilitate installation, adjustment, maintenance, etc. The tubular body has a two-part structure, and is fixed and integrated by a fastening member at the abutting protrusion provided radially outward from the disk rotation surface, thereby making it possible to disassemble it and opening and closing the flow path. The mounting structure of the disk and its drive structure have also been devised.
That is, the disk in this invention is removably fixed to a sleeve fitted into a shaft removably installed between both bodies, and is rotated by rotation of the sleeve to open and close the flow path. .

The shaft has small diameter portions at both ends attached to shaft receivers that are removably fixed to receivers protruding from the piping connection flanges of each body with fastening members at positions substantially diametrically opposed to the abutting edges of the bodies. It is removably fixed by a threaded member screwed onto a threaded portion protruding from the shaft receiver. Note that a plurality of thin plate-shaped shims are interposed between the abutting protruding edges and between the shaft receiving inner surface and the large diameter end face of the sleeve and shaft.

That is, the present invention has a two-part structure in which a seat ring is provided on the inner facing surface on which the disc for opening and closing the flow path rubs in a rotating state. It has a tubular body fixed by a tightening member, and a substantially U-shaped notch protrudes from the piping connection flange of each body at a position substantially diametrically opposed to the abutting protrusion. A shaft receiver is removably fixed to the shaft receiver with a tightening member, and a threaded member is mounted on the shaft receiver at the small diameter portions at both ends and is threaded into the threaded portion protruding outward from the shaft receiver. A rotatable sleeve is fitted into the removably mounted shaft, and a plurality of thin plate-shaped shims are inserted between the abutting protruding edges and between the shaft receiving surface and the end face of the sleeve and large diameter portion of the shaft. The intervening disc, which is approximately elliptical in shape, is fitted into the shaft or sleeve at the end edge of the ellipse in the short axis direction, and is removably fixed to the sleeve, with one part in the long axis direction having a through hole that matches the diameter of the flow path. An on-off valve that has a hole and the other side is a closed part, and the sleeve is connected to a drive device such as an air cylinder that is removably provided to the body or a drive device that is provided separately from the body and the sleeve via an interlocking mechanism. . In addition, the disk has a substantially elliptical shape with one part in the long axis direction having a through hole that matches the flow path diameter and the other part having a closed part, and is rotatably fitted into the shaft or sleeve at the edge in the short axis direction. At the same time, it is removably fixed to a sleeve, and this sleeve is either removably fixed to the body or connected to a drive device provided separately from the body via an interlocking mechanism.

[Effect]

Therefore, when installing in a transport pipe buried underground, each element of the on-off valve, such as the body and disk, and the drive device can be transported to the installation site separately. When assembling, for example, each tubular body is attached to a transport pipe, a disk is inserted between the bodies, a sleeve fitted onto the shaft is attached to this disk, the shaft is mounted on a shaft holder via a shim, and then the shaft The receiver is fitted into a substantially U-shaped receiver protruding from the piping connection flange of the body, and the abutting edges of the tubular body are fastened with a fastening member with a shim interposed between them, and finally the above-mentioned By connecting the drive device to the sleeve via an interlocking mechanism, it can be easily assembled on site. Further, if the sleeve-fitting shaft is attached to the disk in advance together with the shaft receiver, and the disk is attached to the tubular body to the transport pipe, it is possible to assemble the disk more easily on site.

On the other hand, when disassembling it, the disk can be removed along with the shaft by removing the tightening member on the butting edge and removing the shaft holder from the approximately U-shaped notch, and the tubular body can be removed with the piping still attached. , can be easily disassembled. Furthermore, since the disk can be easily removed along with the shaft, it is extremely easy to replace the seat ring installed on the body, and maintenance is also easy.

Furthermore, since multiple thin plate-shaped shims are interposed between the abutting edges and between the shaft receiving inner surface and the sleeve and shaft large diameter end surfaces, even if the seat ring is worn and the sealing performance is degraded, The sealing performance can be adjusted by removing an appropriate number of shims and finely adjusting the distance between the inner surfaces of the body facing each other without replacing the entire seat ring.

〔Example〕

1 to 9 show an embodiment of the on-off valve according to the present invention, which is an example of application to the vacuum garbage collection and transportation system described above. 1 and 2 are each body with a two-part structure, and Figure 3 (details of body 1)
As shown in the figure, each has a piping connection flange 1a, 2a on its outer surface, and an abutment ridge provided radially outward from the disk rotation surface on the inner facing surface 1b, 2b, respectively. The parts 1c and 2c are fixed and integrated with bolts and nuts 3.
Reference numeral 4 denotes a plurality of thin plate-shaped shims (see FIG. 4a) interposed between the abutting protruding edges 1c and 2c. Further, annular recesses 1d and 2 formed on the inner facing surfaces 1b and 2b.
Seat rings 5 and 6 are provided at d. 7 is
A pair of lubricating oil supply devices are provided to the seat rings 5 and 6 at opposite positions in the diametrical direction of the bodies 1 and 2. Reference numeral 8 denotes a disk for opening and closing the flow passage that rotates by sliding against the seat rings 5 and 6 between the inner facing surfaces 1b and 2b of the bodies 1 and 2, and has a generally elliptical overall shape as shown in FIG. and has a through hole 8a that matches the flow path diameter in one part in the longitudinal direction,
The other portion is a closed portion 8b. Therefore, the position of the disk 8 in FIG. 2 shows the fully open state of the flow path. The details of the mounting structure of this disk 8 are shown in FIG. The disk 8 is fitted into the shaft 9 through an insertion hole 8c (see Fig. 5) formed at the edge of the short axis of the ellipse, and is removably fixed to a sleeve 10 which is rotatably fitted into the shaft. has been done. As shown in the figure, the sleeve 10 has a divided structure consisting of a sleeve 10a and a sleeve 10b, both of which have a mounting flange at one end.
is removably fixed to the mounting flanges of the sleeves 10a and 10b with bolts and nuts. Reference numeral 11 denotes oilless bearings that maintain rotation of the sleeve 10 relative to the shaft 9, and are fitted and set at both ends of the sleeves 10a and 10b, respectively. Reference numeral 12 denotes a shaft holder, which has colliding protruding edges 1c and 2c of the bodies 1 and 2.
Approximately U protrudes from piping connection flanges 1a and 2a of each body at a position approximately diametrically opposed to
It is fixed to the receiving parts 1e and 2e, which have letter-shaped notches, with bolts and nuts. The shaft 9 is mounted by inserting small diameter portions at both ends into the shaft receiver 12, and is secured by tightening a screw portion 9a protruding from the shaft receiver 12 with a nut 13. By tightening the nut 13, the shaft receiver 12 is brought into contact with the large diameter end surface 9b of the shaft 9.
Furthermore, between the inner surface of the shaft receiver 12 on the body 1 side, the large-diameter end surface 9b of the shaft 9, and the sleeve end surface, there are provided shims of the same thickness and the same number as the shims 4 narrowed between the abutting protruding edges 1c and 2c. A ring-shaped shim 14 (see FIG. 4b) is interposed therebetween. Therefore, if the seat rings 5 and 6 wear out and the sealing performance deteriorates, remove an appropriate number of shims 4 and 14 to slightly reduce the distance between the inner facing surfaces 1b and 2b of the bodies 1 and 2. By adjusting, the sealing performance can be adjusted. Practically speaking, 3 to 3 0.2mm thick shims
Approximately 5 sheets are interposed and adjustments are made within that range.

Reference numeral 15 denotes a drive device for rotating the disk 8, and a rear end edge 15a having a through hole is inserted into a pivot pin 16 to be rotatably supported. In this example, an air cylinder was used. The pivot pin 16 is mounted on the free end of a mounting arm 17 whose one end is fixed to the approximately U-shaped receiving portions 1e and 2e with bolts and nuts, and is fixed by tightening with nuts 18 at both ends of the threaded portion. Further, the pivot pin 16 has a stepped shape, and after passing through the rear edge 15a of the drive device 15, a collar 19 is fitted into this step. Further, the tip of the telescopic rod of the drive device 15 has a substantially Y-shaped connecting fitting 20, and this connecting fitting 20 has a connecting pin 21.
and is connected to the torque arm 22. This torque arm 22 is fixed to the sleeve 10a by welding or the like (see FIG. 6).

Reference numerals 23 and 24 indicate limit switches that control opening and closing of the flow passage by the disk 8, and are directly set to operate at each fixed position of the torque arm 22 corresponding to the fixed position of the flow passage opening and closing of the disk 8. , are each fixed to a mounting plate 25 fixed to the receiving portion 1e of the body 1. 26 is disk 8
It is an expanded metal guard provided from the viewpoint of protection and safety of maintenance work, etc. It has a divided structure with the outer edge bordered by a band plate 27, and the two bodies are connected by a fixed plate 28, and an angle plate etc. It is fixed at an appropriate location on the body.

Next, the seat structure of the disk 8 will be explained in detail by taking the body 1 side as an example. FIG. 7 is a longitudinal cross-sectional view of the joint portion 1f indicated by the broken line in FIG. are for attaching the aforementioned lubricating oil supply device 7, and are formed at diametrically opposed positions on the outer peripheral portion of the body 1 from the inwardly facing surface 1b. The joint portion 1f is formed with a horizontal hole 1g for attaching and fixing the lubricating oil supply device 7, and a vertical hole 1h that is continuous with the horizontal hole 1g and communicates with the bottom surface of the annular recess 1d. As shown in FIG. 8, the seat ring 5 fitted and set in the annular recess 1d has a generally ring-shaped rubber sheet 5a with a generally convex longitudinal section having steps on both sides, and a rubber sheet 5a on both sides. Consisting of ring-shaped scrapers 5b and 5c installed at the step, and a ring-shaped metal core 5d embedded integrally within the rubber sheet 5a, the upper surface of the rubber sheet 5a that comes into pressure contact with the disk 8 is Annular groove 5e
However, an annular groove 5f is formed on the bottom surface. In addition, communication holes 5g are provided at appropriate intervals in the circumferential direction of the seat ring 5 to communicate the annular grooves 5e and 5f through the core bar 5d.

Therefore, in the actual sheet state, as shown in FIG. 9, the lubricating oil from the lubricating oil supply device 7 is uniformly supplied to the annular groove 5e on the upper surface via the annular groove 5f and the communication hole 5g, so that the annular The groove 5e is always in a state of oil accumulation, which can eliminate the chattering phenomenon caused by the material of the rubber sheet 5a against the metal disk 8, and can therefore minimize the sliding resistance when the disk 8 is opened and closed. It is also possible to achieve a precise seal. The scrapers 5b and 5c are used to prevent dust from entering or getting caught in the sealing surface of the rubber sheet 5a, and are dimensionally spaced between the rubber sheet 5a and the disk 8 so as not to impede the precise sealing of the rubber sheet 5a to the disk 8. It is installed with a small gap between the two. However, in consideration of the fact that the scrapers 5b, 5c themselves will rub against the disk 8 if the rubber sheet 5a wears out, in this example, ultra-high density polyethylene having self-lubricating properties is used as the material for the scrapers 5b, 5c. Further, the material is not limited to this, and a metal material softer than the disk 8 can also be used. Furthermore, nitrile rubber (NBR) with excellent oil resistance is used for the rubber sheet 5a. In addition, since the rubber sheet 5a has a built-in core metal 5d, it has rigidity in terms of shape in relation to the scrapers 5b and 5c, and the fear of the rubber sheet 5a popping out due to vacuum pressure during opening and closing of the disk 8 can be eliminated. .

Note that this seat structure is applicable not only to the above-mentioned disk mounting structure, but also not only to an on-off valve having a simply rotating disk, but also to various types of valves. The lubricating oil supply machine in this example employs a cartridge type automatic lubricating type that gradually pushes out the lubricating oil using gas pressure generated within the container, but is of course not limited to this. Also, the oil supply route is merely an example.

In addition, in order to rotate the disk, that is, rotate the sleeve, we adopted a mechanism in which the air cylinder was pivoted to a mounting arm fixed to the body, and the telescopic rod of the air cylinder was connected to a torque arm fixed to the sleeve. However, the invention is not limited to this, but the rotational force of the motor may be converted into the telescopic movement of the rod, and this telescopic rod may be connected to a torque arm, or the sleeve and the telescopic rod of the air cylinder may be connected by a pinion rack method. Alternatively, various drive forms can be adopted, such as installing a drive device such as an air cylinder or a motor separately from the body, and connecting the sleeve and the drive device by a chain transmission system or a link mechanism system. A system in which the drive device is installed separately from the body is particularly advantageous depending on the circumstances of the installation location.

〔Effect of the invention〕

As mentioned above, the on-off valve according to the present invention allows the on-off valve main body and the drive device to be carried in and installed separately, and is easy to install even in locations with limited installation or installation work space, such as underground piping. Furthermore, since the disk mounting structure is simple and the body and body can be easily disassembled and assembled, it is possible to provide an on-off valve whose adjustment and maintenance of each part are much simpler than conventional products.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view of an embodiment of the on-off valve according to the present invention, FIG. 2 is a front view thereof, and FIG. 3a is a front view of the body 1 on the side of the pipe connection flange.
FIG. 3b is a longitudinal sectional view of the body 1, FIG. 3c is a half front view of the inward facing surface of the body 1, and FIG. 4a is a shim 4.
Fig. 4b is an enlarged plan view of the shim 14, Fig. 5 is a plan view of the disk, Fig. 6 is an enlarged schematic view of the shaft portion, and Fig. 7 is an enlarged view of the seat ring fitting part of the body 1. 8 is an enlarged longitudinal sectional view of the seat ring, and FIG. 9 is a partial state diagram showing the seat structure of the disk on the body 1 side. 1, 2...Body, 1a, 2a...Piping connection flange, 1b, 2b...Inner facing surface, 1c, 2
c... Collision ridge, 1e, 2e... Receiving part, 5...
Seat ring, 8...Disk, 8a...Through hole, 8b...Closing part, 9...Shaft, 9a...
Threaded portion, 10a, 10b... Sleeve, 12...
Shaft holder.

Claims (1)

[Scope of Claims] 1. A two-piece structure in which a seat ring is provided on the inner facing surface on which the disk for opening and closing the flow path slides in a rotating state, and a colliding ridge provided radially outward from the disk rotating surface. It has a tubular body that is fixed by a tightening member at the portion thereof, and a substantially U-shaped notch protrudes from the piping connection flange of each body at a position substantially diametrically opposed to the abutting protrusion. In the receiving department where I was,
The shaft receiver is removably fixed by a tightening member, and can be removed by a threaded member that is mounted on the shaft receiver at the small diameter portions at both ends and is screwed into the threaded portion that protrudes outward from the shaft receiver. A rotatable sleeve is inserted into the shaft provided in the shaft, and a plurality of thin plate-shaped shims are interposed between the abutting protruding edges and between the shaft receiving inner surface and the end face of the sleeve and the large diameter portion of the shaft, The approximately elliptical disk is fitted into the shaft or sleeve at the edge of the ellipse in the short axis direction, and is removably fixed to the sleeve, with one part in the long axis direction having a through hole that matches the flow path diameter, and the other part having a through hole that matches the diameter of the flow path. An on-off valve having a closed portion and a driving device such as an air cylinder removably provided to the body or a driving device provided separately from the body and the sleeve connected via an interlocking mechanism. 2. The on-off valve according to claim 1, wherein the sleeve has a two-part structure, and a disk fitted into the shaft is removably fixed to opposing mounting flanges of both sleeves by a tightening member. 3. The on-off valve according to claim 1 or 2, wherein the sleeve has a torque arm, the outer end of which is removably connected to the telescopic rod end of the drive device.