JPH07150623A - Vacuum valve - Google Patents

Abstract

PURPOSE:To prevent the abrasion in a rolling diaphragm by forming the rolling diaphragm of a large diameter section as part bound to a valve operation chamber, a small diameter section as part bound to a plunger and a taper section as a middle part in a free state before the assembly. CONSTITUTION:A rolling diaphragm 31 consisting of a large diameter section 32A as one end side part, a small diameter section 32B as the other end side part and a taper section 32C as a middle part is formed of a rubber elastic body. An opening flange section 31A of the diaphragm 31 are held and borne between joint sections of housings 21 and 22 forming a valve operation chamber 25 of a vacuum valve 15, and the bottom section 31B is fixed to a plunger 30. In addition, the plunger 30 is moved up and down by balance between spring force of a spring 26 and vacuum pressure, and when a valve body 24 makes operation of opening and shutting, the large diameter section 32A side of the diaphragm 31 is bound to the inside of the housing 22, and the small diameter section 32B moves up and down while binding it to the outside of the plunger 30 in a state to fold at the taper section 32C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a vacuum type waste water collecting device,
The present invention relates to a vacuum valve suitable for constituting a vacuum type chemical liquid transportation device and the like.

[0002]

2. Description of the Related Art Conventionally, as a vacuum valve, Japanese Patent Publication No. 2-503128
There is one as described in the publication. In this conventional technique, a connecting portion between a suction pipe communicating with a tank and a vacuum discharging pipe communicating with a vacuum source can be opened and closed, and a valve body for opening and closing the connecting portion, and a plunger connected with the valve body are provided. The valve working chamber that accommodates the plunger is interposed between the valve working chamber and the plunger, and one end can be crimped to the inner surface of the valve working chamber and the other end can be crimped to the outer surface of the plunger. A rolling diaphragm, a closing force applying unit that is built in the valve working chamber to apply a closing force to the valve body, and a controller unit that applies a vacuum pressure to the valve working chamber to apply an opening force to the valve body. To have.

FIG. 6B is a schematic view showing the plunger 1, the valve working chamber 2, the rolling diaphragm 3, and the closing force applying spring. The rolling diaphragm 3 has a bottomed cylindrical shape as shown in FIG. 6 (A) in a free state before assembly, and its opening flange portion 3A is clamped and supported between the housings 2A and 2B of the valve working chamber 2. , Its bottom portion 3B is fixed to the plunger 1.

As a result, in the rolling diaphragm 3, when the plunger 1 moves up and down by the balance between the spring force of the closing force applying spring 4 and the vacuum pressure applied to the valve working chamber 2, the valve body is opened and closed. As described above, the one end side portion is crimped to the inner surface of the valve working chamber 2, and the other end portion is crimped to the outer surface of the plunger 1 while being folded back at the intermediate portion, and is vertically moved together with the plunger 1. At this time, the rolling diaphragm 3 moves between the one end side portion and the other end side portion so as to roll the intermediate folded portion.

[0005]

However, in the prior art, since the rolling diaphragm 3 has a straight cylindrical shape in a free state before assembly, the bending inner surface of the intermediate folded portion of the rolling diaphragm 3 during use. They rub against each other and wear. Therefore, there are the following problems.

When the rolling diaphragm 3 is worn, slippage at the folded-back portion deteriorates and excessive force is required to roll the folded-back portion, making it difficult or impossible to open / close the valve.

When the rolling diaphragm 3 is partially worn, the valve body tilts and opens and closes, and the valve body does not close completely and leaks.

In order to avoid the above, it is necessary to frequently replace the rolling diaphragm with a short cycle.

It is an object of the present invention to secure opening / closing stability of a vacuum valve for a long period of time and to significantly reduce maintenance labor.

[0010]

SUMMARY OF THE INVENTION According to the present invention, a valve body for opening and closing a communication part between a suction pipe communicating with a tank and a vacuum discharge pipe communicating with a vacuum source, and a valve for opening and closing the communication part, and a valve A plunger that is connected to the body, a valve working chamber that houses the plunger, and a valve working chamber that is interposed between the valve working chamber and the plunger, and one end side of which can be crimped to the inner surface of the valve working chamber and the other end side Is a rolling diaphragm that can be crimped to the outer surface of the plunger, a closing force applying unit that is built in the valve operating chamber and applies a closing force to the valve body, and a vacuum pressure is applied to the valve operating chamber to open the valve body. In a vacuum valve configured to have a controller that applies force, the rolling diaphragm has a large-diameter portion on one end side that can be crimped to the inner surface of the valve working chamber in a free state before assembly. , The other end that can be crimped to the outer surface of the plunger is small Parts, in which those of the middle portion was made to be a tapered portion.

[0011]

[Function] Since the rolling diaphragm has a large diameter portion on one end side, a small diameter portion on the other end side, and a taper portion on the middle portion in a free state before assembly, bending of the intermediate folded portion of the rolling diaphragm during use The inner surfaces do not contact each other and wear due to friction does not occur.

As described above, even if the valve is repeatedly opened and closed, the rolling diaphragm is not worn, and the opening and closing stability of the valve can be ensured for a long period of time.

As a result, the rolling diaphragm replacement period can be lengthened, and the maintenance labor can be greatly reduced.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram showing a vacuum type waste water collecting device, FIG. 2 is a schematic diagram showing a vacuum valve, FIG. 3 is a sectional view showing a controller section, and FIG. 4 is another sectional view showing a controller section. 5
FIG. 6 is a cross-sectional view showing a state before and after assembly of a rolling diaphragm, and FIG. 6 is a cross-sectional view showing a state before and after assembly of a conventional rolling diaphragm.

As shown in FIG. 1, the vacuum type sewage collecting apparatus 10 has a sewage inflow pipe 12 connected to a tank 11, a suction pipe 13 communicating with the tank 11, and a vacuum discharge pipe 14 communicating with a vacuum source. Vacuum valve that can open and close the connection between
Have five.

That is, the sewage discharged from each home or the like flows into the tank 11 through the natural-flow-type sewage inflow pipe 12. Then, when the dirty water is collected in the tank, the vacuum valve 15 is opened, and the dirty water in the tank 11 is sucked through the suction pipe 13. Then, this dirty water is sucked into the vacuum discharge pipe 14 through the vacuum valve 15, collected in a water collecting tank on the vacuum pump, and then sent to a sewage treatment plant or the like by a pressure pump.

The vacuum valve 15 connects the first and second housings 21 and 22 to the band clamp 2 as shown in FIGS.
The valve body 24, the valve working chamber 25, the spring 26, and the controller portion 27 are integrally formed.

The valve body 24 opens and closes a connecting passage 28 which constitutes a connecting portion between the suction pipe 13 and the vacuum discharge pipe 14.

The valve working chamber 25 includes a valve valve body 24 and a valve rod 29.
The cup-shaped plunger 30 connected via the is slidably accommodated.

The spring 26 is the plunger 30 of the valve working chamber 25.
It is built in the upper chamber and exerts a spring force on the plunger 30 to give a closing force to the valve body 24.

As shown in FIGS. 2 and 5B, the vacuum valve 15 includes a rolling diaphragm 31 formed of a rubber-like elastic material such as natural rubber or elastomer between the valve working chamber 25 and the plunger 30. Is intervening. Rolling diaphragm 31
5 has a bottomed cylindrical shape as shown in FIG. 5 (A), its opening flange portion 31A is clamped and supported between the connecting portions of both housings 21 and 22, and its bottom portion 31B is fixed to the plunger 30. . One end of the rolling diaphragm 31 can be crimped to the inner surface of the housing 22 forming the valve working chamber 25, and the other end of the rolling diaphragm 31 can be crimped to the outer surface of the plunger 30.

As a result, the rolling diaphragm 31 has one end when the plunger 30 moves up and down due to the balance between the spring force of the spring 26 and the vacuum pressure applied to the valve operating chamber 25 to open and close the valve valve body 24. The side part is the valve working chamber 2
While being crimped to the inner surface of the housing 22 which constitutes 5, the other end side portion is crimped to the outer surface of the plunger 30 and is vertically moved together with the plunger 30 while being folded back at the intermediate portion. At this time, the rolling diaphragm 3
1 moves between the one end side portion and the other end side portion so as to roll the intermediate folded portion.

However, in this embodiment, the rolling diaphragm 31 is (a) the valve working chamber 25 in the free state before assembly.
The large-diameter portion 32A is one end side portion that can be crimped to the inner surface of the housing 22, and the small-diameter portion 32B is the other end portion that can be crimped to the outer surface of the plunger 30.
An intermediate portion between A and 32B is a tapered portion 32C. As a result, the rolling diaphragm 31 prevents contact between the bent inner surfaces of the intermediate folded-back portion and wear due to rubbing thereof during use, as will be described later in detail.

The controller unit 27 applies a vacuum pressure to the valve working chamber 25 to apply an opening force to the valve valve body 24 when the level of dirty water in the tank 11 rises, and opens the vacuum valve 15 to the suction pipe 13. The vacuum exhaust pipe 14 is made conductive.

The controller unit 27 is constructed as follows. The controller unit 27, as shown in FIG.
The fifth cylinder-shaped cases 51 to 55 are integrally formed with bolts. Normally, the fourth case 54 is integrated with the second housing 22 of the vacuum valve 15 by the band clamp 36.

The controller 27 has a water level detection pipe connection port 56 to which a water level detection pipe 37 communicating with the tank 11 is connected via a hose 38. The water level detection pipe connection port 56 is connected to the first case 51 via a diaphragm 59. A small through hole is provided in the diaphragm 59 so that pressure can be transmitted.

Further, the controller unit 27 has a vacuum pressure connection port 57 to which the vacuum discharge pipe 14 is connected via a hose 41.
Is provided in the third case 53.

Further, the controller section 27 has an atmospheric pressure connection port 58 to which the atmosphere communication pipe 43 is connected via a hose 44.
Is provided in the third case 53.

The first case 51 and the second case 52 are connected via a water level detection diaphragm 60. A push button composed of a plunger 61, a spring 63, and an elastic cover 62 is provided on the upper part of the first case 51 so that the water level detection diaphragm 60 can be manually displaced. The second case 52 has a plunger 65 under the diaphragm 60.
However, it is provided so as to reach the detection valve 68 installed in the third case 53. A shaft seal such as an O-ring 67 is provided around the insertion portion of the plunger 65 into the chamber 83 so that air does not leak into the upper chamber 83 as a pressure control chamber formed by the second case 52 and the third case 53. It is provided.

The detection valve 68 is arranged in the chamber 83 and is operated by the plunger 65 so that the vacuum force can be introduced into the chamber 83. That is, the third case 53 is provided with the passage 57A communicating with the vacuum pressure connection port 57, and the detection valve 68 can open and close the opening of the passage 57A to the chamber 83. The detection valve 68 is provided with a tongue piece 68B capable of closing the opening of the passage 57A at the tip of the leaf spring 68A, and when the leaf spring 68A is elastically pushed by the plunger 61, the tongue piece 68B.
Is separated from the opening of the passage 57A to open the opening, and the room 8
It is possible to introduce a vacuum force into the inside of 3. Reference numeral 66 is a return spring of the plunger 65.

Valve seats 72 and 73 are provided in the fourth case 54 and the fifth case 55, and an upper chamber 85 of the fourth case 54 is provided.
Communicates with the atmosphere through the passage 92, and the fifth case 5
The lower chamber 87 of No. 5 communicates with the vacuum discharge pipe through a passage 91. The chamber 86 formed by the lower part of the fourth case 54 and the upper part of the fifth case 55 has a passage 93 in the working chamber 25 of the vacuum valve body.
Through. The valve element 71 provided between the two valve seats 72 and 73 functions as a three-way valve so as to guide either the atmosphere or the vacuum to the chamber 86 by moving up and down. The valve body 71 is connected to a three-way valve diaphragm 70 provided between the third case 53 and the fourth case 54, and a compression spring 69 is provided above the diaphragm 70 and is pressed against the valve seat 73 of the fifth case 55. Has been. Third case 5
3 is provided with a partition wall, but partly has a communication port 88, and when the detection valve 68 is activated and opened, the upper chamber 83
The vacuum pressure applied to the lower chamber 84 is communicated with the lower chamber 84. Further, a needle valve 74 is provided in the upper chamber 83 of the third case 53 so that the atmosphere gradually enters through the needle valve 74.

The controller section 27 of the vacuum valve operates as follows. When the water level in the tank 11 rises, the water level detection pipe 37,
Since the air pressure in the hose 38 and the water level detection diaphragm upper chamber 81 rises and the water level detection diaphragm lower chamber 82 communicates with the atmosphere, the water level detection diaphragm 60 having a pressure difference is displaced downward.

The plunger 65 provided in the lower portion of the water level detecting diaphragm 60 is pushed by the displacement of the diaphragm 60 and is displaced downward so that the detecting valve 68 provided in the upper chamber 83 of the third case 53 is pushed downward to be opened.

The third case chamber 8 is activated by the operation of the detection valve 68.
The diaphragms 3 and 84 are evacuated and the lower chamber 85 of the three-way valve diaphragm 70 communicates with the atmosphere, so that the diaphragm 70 having a pressure difference is pulled downward, and the valve body 71 also rises accordingly. The chamber 86 that moves from the valve seat 73 of the fifth case 55 to the valve seat 72 of the fourth case 54 and communicates with the working chamber 25 of the vacuum valve body is brought into a vacuum state. As a result, the vacuum valve body is opened, and the dirty water in the tank is removed from the vacuum discharge pipe.
It is discharged to 4.

When the liquid in the tank is discharged, the water level is lowered, the pressurization of the water level detecting diaphragm 60 is lowered, and it is pushed back by the spring 66 provided on the plunger 65, and accordingly, the detection valve 68 is set to the first position. Close to state.

Since the atmosphere contained in the vacuum in the chamber 83 of the third case 53 is taken in through the needle valve 74,
After a slight time lag, the atmosphere is restored, the pressure difference between the two sides of the three-way valve diaphragm 70 disappears, and the spring 69 pushes the valve back to its original state. The chamber is closed and the chamber communicating with the working chamber 25 of the vacuum valve body is brought to the atmospheric state. As a result, the vacuum valve body is closed.

However, according to this embodiment, there are the following effects. Since the rolling diaphragm 31 has a large diameter portion 32A at one end, a small diameter portion 32B at the other end, and a taper portion 32C at the intermediate portion in the free state before assembly, the intermediate folded portion of the rolling diaphragm 31 during use. The inner surfaces of the curved surface do not contact each other, and wear due to friction does not occur.

As described above, even if the valve 15 is repeatedly opened and closed, the rolling diaphragm 31 is not worn and the opening and closing stability of the valve 15 can be secured for a long period of time.

As described above, the replacement period of the rolling diaphragm 31 can be lengthened, and the maintenance labor can be greatly reduced.

In the vacuum valve 15, if the housing 22 is attached with the rolling diaphragm 31 attached to the plunger 30, the rolling diaphragm 31
Since the rubber-like elastic body constituting the above has a large slip resistance, it is necessary to apply a lubricant for easy assembly. The rolling diaphragm 31 may be configured by using a rubber-like elastic body of a type in which a lubricant such as silicon oil is previously kneaded in the molding step instead of the lubricant and the lubricant bleeds.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific structure of the present invention is not limited to this embodiment, and changes in design within the scope not departing from the gist of the present invention can be made. Even if it exists, it is included in the present invention. For example, the specific configuration of the controller unit is not limited to that of the above embodiment.

[0042]

As described above, according to the present invention, in the vacuum valve, the opening and closing stability of the valve can be ensured for a long period of time, and the maintenance labor can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a vacuum type waste water collecting device.

FIG. 2 is a schematic diagram showing a vacuum valve.

FIG. 3 is a cross-sectional view showing a controller unit.

FIG. 4 is another cross-sectional view showing the controller unit.

FIG. 5 is a cross-sectional view showing a state before and after assembly of a rolling diaphragm.

FIG. 6 is a cross-sectional view showing a state before and after assembly of a conventional rolling diaphragm.

[Explanation of symbols]

 11 Tank 13 Suction Pipe 14 Vacuum Evacuation Pipe 15 Vacuum Valve 24 Valve Body 25 Valve Working Chamber 26 Closing Force Applying Spring 27 Controller Part 31 Rolling Diaphragm 32A Large Diameter Part 32B Small Diameter Part 32C Taper Part

Claims (1)

[Claims] 1. A valve body that opens and closes a connecting portion between a suction pipe communicating with a tank and a vacuum discharge pipe communicating with a vacuum source, and a plunger connected to the valve body. The valve working chamber that accommodates the plunger is interposed between the valve working chamber and the plunger, and one end can be crimped to the inner surface of the valve working chamber and the other end can be crimped to the outer surface of the plunger. A rolling diaphragm, a closing force applying unit that is built in the valve working chamber to apply a closing force to the valve body, and a controller unit that applies a vacuum pressure to the valve working chamber to apply an opening force to the valve body. In a vacuum valve having, the rolling diaphragm can be crimped to a large diameter portion and an outer surface of the plunger in a free state before assembling so that one end side portion that can be crimped to the inner surface of the valve working chamber can be crimped. The other end side part is the small diameter part,
A vacuum valve characterized in that the intermediate portion thereof is a tapered portion.