JPH073866A - Cut-off valve of vacuum valve used for vacuum type sewerage system - Google Patents

Abstract

PURPOSE:To remove easily a bonnet of a shutoff valve for a vacuum type sewerage service vacuum valve. CONSTITUTION:A vacuum type sewerage service vacuum valve 5 is installed in a sewerage pit 4. A shutoff valve, which is used for its maintenance service, is installed in parallel to the vacuum valve. An angle valve 8 is adopted for the structure of this shutoff valve. A valve box 8a of this angle valve 8 is fixed with the sewerage pit and impossible to be removed. As a bonnet 13, which covers the valve box 8a, is mounted to the valve box 8a with a bonnet coupling mechanism, the bonnet 13 can be mounted and removed easily so as to solve the problem. When the bonnet 13 is removed, it is possible to inspect and clean the sewerage in the same fashion with an ordinary catch basin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve for shutting off vacuuming of a vacuum valve used in a vacuum sewer system.

[0002]

2. Description of the Related Art Generally, sewers are generally allowed to flow naturally, but in the case of a wide drainage area and a flat area, a pump station is exceptionally provided for pumping. By the way, recently, the adoption of a vacuum sewer system provided with a vacuum pumping station has been proposed in an area with an upslope topography.

That is, as shown in FIG. 6, the drainage from the home 1 is evacuated by a vacuum tank 3 provided with a vacuum pump 2 and is pushed down by the expanded air in the pipeline (which flows down). It is a facility (simply called evacuation), and a sewage system 4 with a vacuum valve is provided in the middle of the pipeline. The vacuum valve 5 of the dirty water box 4 is automatically opened and closed to intermittently suck the waste water to the vacuum pump station.

Therefore, the drainage water from the home 1 flows into the inflow pipe 6
First, it collects in sewage masu 4. When a certain amount of this drainage is accumulated, the vacuum valve 5 is opened and the drainage pipe 7 is evacuated and flows into the vacuum tank 3. In addition, this vacuum tank 3
Communicates with the sewage treatment plant via a pressure pump.

By the way, the vacuum valve 5 is constructed to be opened and closed automatically without the use of power by means of a water level sensor or the like, so maintenance thereof is indispensable. However, in the vacuum tank 3, there are many other dirty water with vacuum valves 4
The operation of the vacuum tank 3 cannot be stopped in order to maintain one vacuum valve 5, and thus the angle valve that performs a partitioning action is provided between the vacuum valve 5 and the vacuum tank 3. (Valve in which the inlet and the outlet of the valve box are orthogonal to each other and the flow direction changes to a right angle) 8 is required. Therefore, the angle valve 8 is normally open, but when the specific vacuum valve 5 is maintained, it is closed to shut off the vacuum drawing from the vacuum tank 3 (for example, Japanese Patent Laid-Open No. Hei 3). -247,827).

The sewage system 4 with a vacuum valve will be further described. As shown in FIG. 7, a horizontal partition plate 9 is provided on the masu body 4a of the sewage masu 4 and divides it into an upper chamber and a lower chamber. Moreover, mass on top of the main body 4a of about 1 ^m phi sailing -
The lid 10 is covered. The lower chamber of the main body 4a serves as a drainage reservoir, and the upper chamber serves as a machine chamber for the vacuum valve 5 and the angle valve 8.

The angle valve 8 is fixed to a partition plate 9. That is, the foot portion of the valve box 8a of the angle valve 8 is fixed by the shaped steel beam 11 that supports the partition plate 9 and cannot be easily removed. Further, the angle valve 8 is provided with a long valve rod 12,
The valve rod 12 penetrates a bonnet 13 that covers the valve box 8a. In addition, in FIG. 7, 14 is a concrete for forming a deep groove.
The bottom portion, 15 is a vacuum suction tube.

[0008]

By the way, in a normal natural-flow-type sewer, it is obligatory to install a cleaning / inspection manhole at a place where the flow changes at a right angle. Therefore, even in the vacuum sewer system, since the flow changes at a right angle in the direction of the angle valve 8 (see FIG. 1), it is preferable that the angle valve itself also has a cleaning / inspection function. On the other hand, the bonnet 13 of the angle valve 8 is removed, and an inspection ball (having a diameter slightly smaller than the pipe diameter) is inserted from here to check the vacuum state of the outflow pipe 7 while moving the inside of the outflow pipe 7. Is also done.

However, in the conventional angle valve 8,
It is not easy to remove the valve box 8a fixed to the partition plate 9. Moreover, since the bonnet 13 and the valve box 8a are attached and sealed by a large number of bolts, the bonnet 13 can be removed easily. It takes about 1 ^m
It becomes difficult to perform the inspection work with the inspection ball inside the φ manhole cover 10, and of course, the angle valve 8 itself is regarded as a meeting place, and no devise has been made to perform the cleaning / inspection function.
There was a problem.

Further, in the conventional angle valve 8, the vacuum valve 5
If the angle valve 8 is to be opened after completion of the maintenance, there is a problem that the valve body of the angle valve 8 is heavy due to the vacuum pressure and the valve opening operation becomes heavy. Further, the conventional angle valve 8 has a problem that the protruding support pillar for maintaining the valve opening is not set on the valve box or the bonnet, so that it is easy to lose and the handling thereof is troublesome.

[0011]

The present invention has been made in order to solve these problems, and the gist thereof is as follows: 1) With a vacuum valve divided by a partition plate in the upper and lower chambers. A sewage chamber is provided with a vacuum shut-off sluice valve, the sluice valve is provided with a valve box, a bonnet covering the valve box, a valve rod penetrating the bonnet and sliding in the vertical direction, and the valve rod. A valve body provided at the lower end of the valve rod and a handle provided at the upper end of the valve rod, and a bayonet coupling mechanism and a bonnet rotation mechanism are provided between the bonnet and the valve box fixed to the partition plate. It is a sluice valve used in a vacuum sewer system characterized by having a lock mechanism for stopping, and 2)
The upper and lower chambers are separated by partition plates, and a sewage tank with a vacuum valve is provided with an angle valve with a horizontal inlet and a vertical outlet to serve as a vacuum shutoff valve for the vacuum valve. When,
A bonnet that covers the valve box, a valve rod that penetrates the bonnet and slides in the vertical direction, and a valve body that is provided at the lower end of the valve rod and has a funnel-shaped vertical outlet upper end as a valve seat, A bayonet coupling mechanism and a locking mechanism for a bonnet rotation stop between a bonnet and a valve box which is composed of a handle that is rotatable at the upper end of the valve rod and is retained. It is in an angle valve used in a vacuum type sewer system characterized in that
In the lower chamber, a sewage box with a vacuum valve separated by a partition plate, an angle valve having a horizontal inlet and a vertical outlet is provided as a vacuum shutoff valve for the vacuum valve, and the angle valve is a substantially funnel-shaped valve box, A bonnet that covers the valve box, a valve rod that penetrates the bonnet and slides in the vertical direction, and a valve body that is provided at the lower end of the valve rod and has a funnel-shaped vertical outlet upper end as a valve seat, A handle which is rotatable at the upper end of the valve rod and is retained, and the bonnet is provided with an upward boss on which the valve rod is slidable in the vertical direction, and a male screw is provided on the outer periphery of the boss. In the angle valve used in the vacuum sewer system, which is characterized in that female threads are provided on the inner circumference of the inner recess of the handle, and these screws are screwed together to crimp and separate the valve body. 4) Horizontally fill the upper and lower chambers with a vacuum valve, which are separated by a partition plate. And a vacuum shutoff valve of a vacuum valve by providing an angle valve having a vertical outlet, and the angle valve includes a substantially funnel-shaped valve box, a bonnet that covers the valve box, and a bonnet that penetrates the bonnet and extends vertically. From a sliding valve rod, a valve body provided at the lower end of the valve rod and having a funnel-shaped vertical outlet upper end as a valve seat, and a handle that is rotatable at the upper end of the valve rod and is retained. The pivot support piece is provided on the upper surface of the bonnet, and the pivot support piece and the upper surface of the hood,
An angle valve used in a vacuum sewer system, characterized in that a pivot shaft provided at the base of a column supporting the handle is supported to allow the column to be raised and lowered.

[0012]

The present invention will be described in detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 is a vertical sectional view of the whole embodiment of the present invention, and FIG.
1 is an operation view of a main part of FIG. 1, FIG. 3 is a plan view taken along the line A-A of FIG. 2, FIG. 4 is a detailed view of the main part, FIG. 5 is a main part view, and FIG.
6B is a vertical cross-sectional view and FIG. 6C is a side view, and the same portions as FIGS. 6 and 7 showing a conventional example are omitted.

The angle valve 8 of this embodiment is used in a vacuum sewer system, and the angle valve 8
Is Masu with vacuum valve sewage mounted 4, for example, a diameter of about 1 ^m phi, a depth of about 2 ^m concrete - has become preparative made cylinder masu.

First, the outline of the angle valve 8 will be described. Valve casing 8a is formed in a substantially funnel shape with a rigid PVC, the horizontal inlet 20 and vertical outlet 21, they become respectively difference mouth shape, PVC pipe outside diameter of about 90 ^mm phi via a joint It can be adhesively bonded. In this valve box 8a,
A hard vinyl chloride bonnet 13 is detachably covered, and a stainless steel valve rod 12 having a stroke of about 110 ^mm is provided at the center of the bonnet 13 in the vertical direction a.
Is slidably penetrated through. At the lower end of this valve rod 12,
A disc-shaped rubber valve body 22 is fixed. The valve body 22 has a valve seat at the upper end of the vertical outlet 21 which is squeezed into a funnel shape of the valve box 8a. At the upper end of the valve rod 12, a handle 23 that is capable of retaining and rotating is attached, and the handle 23 is gripped to pull up or push in the valve body 22.

Therefore, according to this angle valve 8,
Normally, the valve body 22 is pulled up, the horizontal inlet 20 and the vertical outlet 21 are opened, and the drainage flows in the c direction. However, when maintaining the adjacent vacuum valve 5 (see FIG. 6), The handle 23 is gripped and the valve body 22 is pushed in, and the valve body 22 is pressed against the valve seat to close the valve. as a result,
Vertical outlet 21 communicating with the vacuum tank 3 (see FIG. 6)
The vacuum from is cut off.

Next, each part of the angle valve 8 will be described in detail. The bonnet 13 covers the valve box 8a as follows. That is, the bonnet 13 is composed of an inverted cup-shaped top plate 24 and cylindrical legs 25, and a flange 26 is provided on the outer periphery of the top plate 24 so as to project. This flange 26
Is mounted on the upper opening 27 of the valve box 8a, and the cylindrical foot 25 is closely fitted to the upper opening 27 via an O-ring 28. The four notches 29 and the valve box side tongue piece 3 are provided on the inner circumference of the upper opening 27.
0 is provided, and four bonnet side tongues 31 that engage with these notches 29 and valve box side tongues 30 are provided on the outer periphery of the cylindrical foot 25, so-called bayonet coupling mechanism. Are configured.

A knob piece 32 projects from the upper surface of the top plate 24 to the outer peripheral surface thereof, and a stopper piece 33 projects from the outer peripheral surface of the upper opening 27. This knob piece 32
Of the bonnet 1
The normal rotation of 3 is stopped. Also, the top plate 24
From the upper surface to the outer peripheral surface, a U-shaped pivot support piece 34 in side view is provided on the opposite side of the knob piece 32. A vertical reversing stop piece 35 is formed on the lower end of the pivot support piece 34 protruding from the top plate 24, and on the outer peripheral surface of the upper opening 27, on the opposite side of the stopper piece 33,
A horizontal reverse stop piece 36 is provided so as to project. As shown in FIG. 4, these vertical reverse rotation stop pieces 35 and horizontal reverse rotation stop pieces 36 are adapted to stop the reverse rotation of the bonnet 13 by shallow claw engagement. Therefore, these reverse rotation stop pieces 35 and 36 are positioned or, together with the forward rotation stopper, serve as a lock mechanism for preventing reverse rotation of the bonnet.

Therefore, in order to cover the bonnet 13 on the valve box 8a, the bonnet side tongue piece 31 is fitted into the notch 29, and then the knob piece 32 is gripped to rotate the bonnet 13 to the right by 40 °. Then, the vertical reverse rotation stop piece 35 is rotated over the horizontal reverse rotation stop piece 36, and the hanging portion of the knob piece 32 is brought into contact with the stopper piece 33. As a result, the bonnet 1
3 is locked in the valve box 8a. To remove the bonnet 13, the reverse operation may be performed, but the shallow claws of the vertical reverse rotation stop piece 35 and the horizontal reverse rotation stop piece 36 may be removed (the removing method will be described later), and the reverse rotation may be performed. Therefore, the valve box 8
The bonnet 13 can be easily attached to and detached from a and the angle valve 8 itself can be easily used as a meeting room.

Next, the screwing 41 between the handle 23 and the bonnet 13 will be described. Upward and downward bosses 37 and 38 are formed in the central portion of the top plate 24 of the bonnet 13, and the valve rod 12 penetrates these bosses 37 and 38 slidably in the vertical direction. A gland packing 39 is fitted in the inner circumference of the upward boss 37, and the valve rod 12 penetrates through the gland packing 39.
The gland packing 39 is held by a packing pressing collar 40. Therefore, even if the valve rod 12 penetrates the bonnet 13 slidably, the vacuum in the angle valve 8 is not impaired. Reference numeral 47 is a pin that integrates the upward boss 37 and the packing pressing collar 40.

A male screw is provided on the outer periphery of the upward boss 37, and a female screw is provided on the inner recess of the handle 23, and these screws are screwed together 41. When the valve body 22 is crimped to the valve seat, the handle 23 is rotated and crimped by the screw 41 to close the valve. Also,
When the valve body 22 that is evacuated and becomes heavy is separated from the valve seat, the handle 23 can be rotated in the opposite direction and the valve can be easily opened by utilizing the force reduction by the screw. The valve rod 12 and the valve body 22 do not rotate when the handle 23 rotates. In addition, the valve body 22 that has opened is as shown by the chain line in FIG.
It is pulled up until it comes into contact with the downward boss 38.

Next, the protrusion supporting column 42 for maintaining the valve opening will be described. The angle valve 8 of this embodiment is always open. Therefore, the valve body 22 is always pulled up from the valve seat, so that the handle 23 is raised, the bonnet 1
A pier support post 42 is required between 3 and the handle 23.

The projecting support column 42 has a long-sided column 42a and a short-sided base portion 42b which are L-shaped, and each of which is composed of a semi-cylindrical body and a U-shaped tubular body. 42a embraces and fits the valve rod 12, and the short side base portion 42b
Covers the pivot support piece 34. A pivot 43 is laterally provided on the short side base 42b.
Is rotatably supported by being sandwiched between the pivot support piece 34 and the upper surface of the bonnet 13. A receiving piece 44 projects from a portion of the pivot support piece 34 that protrudes from the top plate 24.

In the bearing space formed by the pivot support piece 34 and the upper surface of the bonnet 13, the pivot 43 has the bonnet 1
3 is a space that can slide in the radial direction b, and a small narrow portion 45 formed by a pair of small protrusions is formed at the entrance of this bearing space. Therefore, the pivot 43 is prevented from slipping out of the bearing space. When the pivot 43 is placed on the narrow portion 45, the pivot support piece 34 is slightly lifted by the resin elasticity from the valve box 8a, and the vertical reverse stop piece 35 and the horizontal reverse stop piece 36 are disengaged.

Therefore, in order to set the projecting support column 42 on the bonnet 13, before the bonnet 13 is covered with the valve box 8a, the pivot 43 is inserted from the downward opening protruding from the top plate 24 of the pivot support piece 34. Inserted and short side base 42
The axis support 34 is covered with b. Next, the pivot 43 is attached to the narrow portion 4.
Push it over 5 and insert it into the bearing space. Then, the handle 23 can be supported by erecting the long side post 42a. Further, when the long side post 42a is tilted in the direction of FIG. 2d, the pivot 43 is slid outward in the b direction and tilted. At this time, since the short side base portion 42b contacts the receiving piece 44, it cannot fall down any more. Therefore, the support column 42 can be easily handled without being lost. Further, the tilted long side column 42a may be used as a wrench for the bayonet connecting operation of the valve box 8a and the bonnet 13. A ridge 46 is provided on the lower side of the projecting support column 42 so as to be wrapped around and fitted into the upper boss 37. Although the present embodiment has been described with the angle valve, the present invention is not limited to this and may be a sluice valve such as a slice valve or a gate valve.

[0025]

According to the present invention, since the valve box and the bonnet are attached / detached by the bayonet connection, the attachment / detachment of the bonnet is facilitated, and the maintenance work of the sewer system is facilitated. Even if the flow changes at a right angle between the horizontal entrance and the vertical exit, it can be inspected and cleaned in the same manner as in the hall. The valve body is pulled up and down by grasping the handle and sliding the valve rod in the up and down direction. Even if the stroke is long, there is no problem in opening and closing the valve, and of course, it does not interfere with the valve seat. Since the crimping and separating are performed by the screw, the operation can be easily performed even when the vacuum pressure is applied. A pivot is provided at the base of the projecting support column, and the projecting support column can be raised and lowered freely on the bonnet about this pivot, so that the projecting support column can be easily handled.

[Brief description of drawings]

FIG. 1 is an overall vertical cross-sectional view of an embodiment of the present invention.

FIG. 2 is an operation diagram of a main part of FIG.

FIG. 3 is a plan view from A of FIG.

FIG. 4 is a detailed view of a main part.

FIG. 5 is a view showing a supporting pillar.

FIG. 6 is a conventional example.

FIG. 7 is a conventional example.

[Explanation of symbols]

4 ... dirt water, 5 ... vacuum valve, 8 ... angle valve, 8a ... valve box, 9 ... partition plate, 12 ... valve rod, 13 ... bonnet, 20
... Horizontal entrance, 21 ... Vertical exit, 23 ... Handle, 29 ...
Notch, 30 ... Valve box side tongue, 31 ... Bonnet side tongue,
32 ... Knob piece, 33 ... Stopper piece, 35 ... Vertical reverse stop piece, 36 ... Horizontal reverse stop piece

Claims (4)

[Claims] 1. A sewage box with a vacuum valve, which is divided into upper and lower chambers by a partition plate, is provided with a sluice valve for vacuum shutoff, the sluice valve having a valve box, and a bonnet covering the valve box. ,
A valve rod that penetrates the bonnet and slides in the vertical direction;
A valve body provided at the lower end of the valve rod and a handle provided at the upper end of the valve rod, and a bayonet coupling mechanism between a valve box fixed to the partition plate and a bonnet, and , A sluice valve for use in a vacuum sewer system, which is equipped with a lock mechanism to prevent bonnet rotation. 2. A sewage box with a vacuum valve, which is partitioned by a partition plate in the upper and lower chambers, is provided with an angle valve having a horizontal inlet and a vertical outlet to serve as a vacuum shutoff valve for the vacuum valve. A funnel-shaped valve box, a bonnet that covers the valve box, a valve rod that penetrates the bonnet and slides in the vertical direction, and a funnel-shaped vertical outlet upper end that is provided at the lower end of the valve rod. A bayonet coupling mechanism between a valve body fixed to the partition plate and a bonnet, and a valve body which is a seat, and a handle which is rotatable at the upper end of the valve rod and is retained. An angle valve used in a vacuum sewer system, which is equipped with a lock mechanism to prevent bonnet rotation. 3. A sewage box with a vacuum valve, which is divided into upper and lower chambers by a partition plate, is provided with an angle valve having a horizontal inlet and a vertical outlet to serve as a vacuum shutoff valve for the vacuum valve. A funnel-shaped valve box, a bonnet that covers the valve box, a valve rod that penetrates the bonnet and slides in the vertical direction, and a funnel-shaped vertical outlet upper end that is provided at the lower end of the valve rod. A valve body serving as a seat, and a handle that is rotatable at the upper end of the valve rod and is retained, and the bonnet is provided with an upward boss that allows the valve rod to slide vertically. Used in a vacuum sewer system characterized in that a male thread is provided on the outer circumference of the boss, a female thread is provided on the inner circumference of the inner recess of the handle, and these threads are screwed together to crimp and separate the valve body. Angle valve. 4. A sewage box with a vacuum valve, which is divided into upper and lower chambers by a partition plate, is provided with an angle valve having a horizontal inlet and a vertical outlet to serve as a vacuum shutoff valve for the vacuum valve. A funnel-shaped valve box, a bonnet that covers the valve box, a valve rod that penetrates the bonnet and slides in the vertical direction, and a funnel-shaped vertical outlet upper end that is provided at the lower end of the valve rod. A valve body serving as a seat and a handle that is rotatable at the upper end of the valve rod and is retained. A pivot support piece is provided on the upper surface of the bonnet, and the pivot support piece and the top surface of the bonnet are provided. An angle valve used in a vacuum sewer system, characterized in that a pivot shaft provided at a base portion of a supporting column for supporting the handle is supported so that the supporting column can be raised and lowered.