JPH0637245Y2 - Rapid air valve with strainer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a rapid air valve equipped with a strainer that is installed in the middle of a pipeline such as agricultural water or sewage.

[Prior Art] The rapid air valve is closed to originally repair the pipeline or perform new piping work, etc. to temporarily stop water flow, and then discharge the air filled in the pipeline when refilling water. The main purpose is to discharge air and gas dissolved in water or air dissolved in water naturally due to other conditions such as the gradient of pipelines, and there are multiple reasons for installation. )
The float valve body 4a, which is of a standard type defined by the above, and can be moved up and down by being constrained by the guide 3a provided in the valve box 2a. By the way, even in the case of the same pipeline, if solids are mixed in, such as agricultural water and sewage, a strainer is installed on the pipeline side to prevent solids from entering in order to continue normal operation of the valve. There must be. As an example of prior art relating to this, there is a "quick air valve for sewage / agricultural water" (Japanese Utility Model Publication No. 61-23732, Fig. 5). This device floats as shown
33 A spherical float valve element 4a is provided in a cage 34 whose bottom portion is connected with an upper portion through a connecting rod, and this cage has a mesh shape, and a step portion is formed at the upper opening edge, and a small air is formed at the center of the step portion. The target is an air valve on which a valve body having holes 6a is mounted. In addition, a strainer case 35 is installed between the air valve body and the lower casing in order to prepare for the case where polluted water such as sewage flows through the pipeline. I try not to enter. As a result of this configuration, the cage 34 moves up in conjunction with the float 33 first, so that water does not reach the small air hole valve seat, there is no risk of clogging or damage, the product life is extended, and accurate operation is always maintained. You can get it. In addition, with regard to elimination of clogging by backwashing, various proposals for improvement have been found in various fields. For example, in backwashing a strainer that crosses the pipeline at the suction part of the condensate pump, when the strainer stretched diagonally across the pipeline in the past has clogged due to foreign matter, one toward the strainer surface What was spraying the washing water from the spray nozzle of
Actually opened 62-1692 which has been changed to injection from multiple injection nozzles
No. 76 gazette, in a device that separates and removes impurities through sugar solution in a room containing an ion exchange resin, both are discharged together when the mud accumulated on the ion exchange resin is backwashed and removed. There is also Japanese Utility Model Laid-Open No. 60-35743, which deals with the problem of the problem.

[Problems to be solved by the invention] The conventional technology listed above should prevent foreign matter such as dust contained in agricultural water and sewage from entering the valve seat. Fine foreign matter attached to the outside of the cage 34 (on the side opposite to the valve seat) may cause clogging and significantly reduce the bending function. In this prior art, as an embodiment for preventing clogging, the cleaning water inflow portion 10b is provided to wash away the foreign matter causing the clogging, but the float valve body 4a is operated by the action of the float 33 together with the cage 34. The float valve body fits into the cage and overlaps closely when the cage moves so as not to be submerged in the cage because it moves together. It cannot be said that the jetting force does not reach and the function of forcibly exfoliating foreign matter adhering to the outer surface is severely lacking. In addition, in order to wash out the clogging of the strainer 4 near the bottom, it cannot help deciding that the strainer 4 is too weak. Further, the technical improvement relating to backwashing in other fields exemplified above does not give any suggestion in terms of improving the backwashing power itself and is not worth reference.

Also, in order to use it for pipelines containing foreign matter in this way, it is necessary to specially manufacture a quick air valve whose design has been changed separately, but it is provided in another form because it is much less demanded than the water supply pipeline. Doing so does not endure the complexity and is economically unfavorable.

Further, as shown in FIG. 5, in the case of the conventional technique, clean water is required for washing, and therefore the water supply pipe must be located nearby. However, since there is not always a water supply line near the sewer line or the agricultural water line, and it is more common that there is no such a line, the air valve having such a configuration cannot be applied.

In order to solve the problems described above, the present invention is a known rapid air valve for normal fresh water, and can be applied to a pipeline for foreign water mixed with agricultural water / sewage, Moreover, it is an object of the present invention to provide a novel structure in which even if it is installed in a place where fresh water for washing is not provided, the washing action is sufficiently performed, the valve is prevented from clogging due to the inclusion of foreign matter, and this effect can be maintained forever.

[Means for Solving the Problem] A rapid air valve equipped with a strainer according to the present invention is provided with a repair valve 14 which is installed in the middle of a pipeline to open and close communication with running water, and is constrained to guide in a valve box. The body of the fresh water air valve that opens and closes communication with the outside air by the float valve body 4 that can be lifted and lowered is diverted as it is, and the strainer case 8 is interposed between the repair valve 14 and the rapid air valve 1, and the strainer A plurality of injection ports 9 for injecting the cleaning water are opened from the upper inner peripheral surface of the strainer case 8 toward the inner surface of the strainer 7 that crosses the flow path in the case 8 on the side of the rapid air valve, and the valve in the repair valve 14 is opened. body
A plurality of second injection ports 12 for injecting toward the outer surface of the strainer 7 on the side of the rapid air valve are opened at the center of the 16 and pressure water can be independently opened and closed to the injection ports 9 and the second injection ports 12, respectively. The above-mentioned problems are solved by connecting the supply pipe 17 for cleaning water and the second inflow passage 13 for cleaning water, respectively.

In addition to this configuration, an opening / closing valve 18 and a strainer 19 are provided to connect the cleaning water inflow pipe 17 connected to the strainer case 8 to the inside of the repair valve 14 and open / close the communication of the cleaning water inflow pipe 17 with the pipeline water. The second injection port 12 is inserted into the valve body 16 while being interposed.
It is a very desirable embodiment that a second washing water inflow passage 13 that communicates with the second washing water inflow passage 13 is provided, and a sub valve 25 that connects the second washing water inflow passage 13 and the inside of the repair valve 14 is opened and closed. .

[Operation] FIG. 1 is a plan view of the embodiment of the present application, FIG. 2 is a front view of the AA cross section of FIG. 1, and FIG. 3 is a front view of the same BB cross section. In the figure, a quick air valve 1 is guided 3 in a valve box 2.
The float valve body 4 is held so that the float valve body 4 can be lifted up and down.

Since the function of the quick air valve is achieved by opening and closing the large air port 5 and the small air port 6, if foreign matter is mixed in the water entering from the water filling port provided at the bottom bottom of the guide, the valve function will be exerted. In order to defeat the purpose of mounting the blocking valve, a strainer 7 is stretched over the pipeline for agricultural water / sewage to prevent foreign matter from entering. The strainer 7 is built in the strainer case 8 and has a function of filtering foreign matter when water passes from a lower pipe (not shown) through the repair valve 14. As a result, fine foreign substances that are filtered and adhered to the outer surface (pipe side) of the strainer 7 block the mesh to prevent water from advancing and retreating, but from the strainer case 8 to the inner surface (float valve body side) of the strainer. Since the cleaning water is directly injected from the plurality of injection ports 9, foreign matter on the outer surface of the strainer is scattered due to this water force, and the normal mesh is restored. Another action for assisting this main action occurs from the second injection port 12 for injecting washing water (dirt water in the pipe) toward the outer surface (pipe side) of the strainer 7 as shown in FIG. Water is guided through the second cleaning water flow path 13 that opens from the repair valve toward the strainer case and is jetted upward. Due to this separate action, sewage is taken out from the pipeline side of the closed repair valve and sprayed on the outer surface of the strainer to further wash away the solid matter that has been locked on the outer surface, so that foreign substances are thoroughly washed away. The cleaning action is closer to perfection.
This action is the basic action of the present invention, but if there is no pipeline for introducing clean water for washing near the strainer case, it will flow through the pipeline of sewage and agricultural water equipped with a quick air valve. There is no choice but to use the dirty water itself for cleaning. In order to solve this problem, the repair valve 14
The opening / closing valve 18 and the strainer 17 are provided in the middle of the inflow pipe, while the washing water inflow pipe 17 that is openable and closable and communicates with the upper injection port of the strainer 7 is opened in the lower part of the strainer 7. A washing water outflow passage 11 is provided at the bottom of the strainer case 8. As a result, sewage is taken out from the closed conduit side of the repair valve 14 to be purified and sprayed from the inner surface to the outer surface of the strainer, and the solid matter adhering to the outer surface is washed away and discharged from the washing water outflow passage 11.

[Embodiment] An embodiment of the present application will be described with reference to FIGS. 1 to 3 while avoiding duplication with the previous section.

In FIGS. 2 and 3, the repair valve 14 is in communication with the pipeline, and is closed during inspection and repair of the rapid air valve 1 and the strainer case 8 to interrupt the running water so as not to hinder the work. In this example, the valve body 16 is rotated in the valve box 15 to open and close the valve. The cleaning water inflow pipe 17 constitutes the cleaning water inflow pipe 17 which opens in the body of the valve box 15 and opens the injection port 9 toward the inner surface of the strainer case 8 (on the side of the float valve body) and the opening / closing valve 18 and the strainer. 19 and are installed in the conduit.

The central axis of the injection port 9 is formed at an angle such that the extension of the central axis of the injection port 9 passes on the right (left) side of the central axis so as not to intersect with the central axis of the strainer 7. A washing water outflow pipe 20 is attached to the lower part of the strainer case together with an opening / closing valve 21 to form a washing water outflow passage 11.

Therefore, in order to backwash foreign matter that has clogged the outer surface of the strainer 7, the repair valve 14 is closed and the opening / closing valve 21 is opened to discharge the water in the valve box 2 of the quick air valve and the strainer case 8 to the outside. After that, open the on-off valve 18 and open the valve box 15 from the flow path.
The jet water collides from the jet outlet 9 toward the inner surface of the strainer via the washing water inflow pipe 17, and the water penetrating the strainer is discharged from the washing water outflow passage 11.

FIG. 3 is a front view of the BB cross section of FIG. 1, and from FIG.
It corresponds to a cross section rotated by 90 ° and shows a second cleaning function added to further enhance the first cleaning function described so far.

In the figure, one of the valve bodies 16 of the repair valve 14 (the left side in the figure) is rotatably supported by the valve box 15, and the other (the right side in the figure) is a valve shaft 22.
Is pivoted by. The auxiliary valve rod 23 is located at the center of the valve shaft 22.
Is independently slidably inserted and its valve body side (left side in the figure)
Reduces the diameter to form a communication passage 24, and further expands the tip to form a sub valve 25, which forms a valve mechanism that opens and closes with a sub valve seat 26 provided on the valve body. Since the other side of the sub valve rod 23 is always biased to the right side in the drawing by the spring 27, the sub valve seat 26 is in pressure contact with the end surface of the valve shaft 22 at this position. The second injection port 12 is opened toward the bottom of the outer surface of the strainer 7, and the second washing water inflow passage 13 for sending water to the strainer 7 is formed by penetrating the partially thickened body of the valve body 16. Therefore, the inflow passage is opened and closed with the left and right sliding of the auxiliary valve rod 23, and the second injection action is exhibited. The sliding of the auxiliary valve rod 23 to the left side is realized by the manual operation of the lever 28 that pushes the inside of the valve shaft leftward in the figure against the biasing force of the spring 27 (two-dot chain line in the figure). For the transmission of manual movements,
A lever U-shaped lever head 29 is attached to the lower part of the lever 28, while a valve shaft head 29a is attached to the tip of the valve shaft 22. The valve shaft head portion 29a is formed by joining two lateral U-shaped members in parallel with each other at a distance and joining them in a planar U-shape. The lever head portion 29 is fitted into this distance and only one end thereof is pin 30. Is pivotally supported by. The lever head 29 comes into contact with the tip of the auxiliary valve rod 23 and balances with the urging force of the spring 27.
When the lever 28 is pushed in, the lever head 29 moves as shown by the chain double-dashed line to push the auxiliary valve rod 23 into the valve box 15 and open the auxiliary valve.

In this embodiment, since it is necessary to open and close the valve element 16 and the auxiliary valve 25 to be opened and closed in any combination, as shown in FIGS. A guide 32 having a guide hole 31 is attached, and the lever 28 is inserted into the guide hole.

The relationship between the position of the lever 28 and the opening and closing of the valve is shown in FIG.
Table 1 shows a, b, c and d separately.

After cleaning, if the on-off valves 18 and 21 are closed and only the sub-valve 26 is opened, the strainer case 8 and the valve box 2 of the quick air valve 1 are gradually filled with water, and the quick air valve is closed quietly. There is no fear of water or water splashing outside. After that, since the top and bottom of the repair valve 14 are in a pressure equalized state, the valve element 16 can be opened with a light operating force.

[Advantage of the Invention] Since the invention of the present application has the above-described configuration, the standard rapid air valve standardized for water supply pipelines can be applied as it is to wastewater pipelines containing a lot of foreign substances such as agricultural water and sewage. ,
It is suitable for a valve production system with a large mass production effect and is economically advantageous. In addition, even if there is no water supply pipe near the pipe and clean water for washing cannot be obtained, the purpose of washing can be achieved by adding some auxiliary structure, and valve function due to clogging of solids It prevents the deterioration and realizes long-term function maintenance superior to the conventional technology.

[Brief description of drawings]

FIG. 1 is a plan view of the present invention, and FIG. 2 is A in FIG.
-A sectional front view, FIG. 3 is a front sectional view taken along the line BB in FIG. 1, and FIG. 4 is a perspective view showing a standard type of quick air valve.
FIG. 5 is a front sectional view showing a conventional technique. 1 ... Rapid air valve, 2 ... Valve box 3 ... Guide, 4 ... Float valve body 7 ... Strainer, 8 ... Strainer case 9 ... Injection port, 10 ... Washing water inflow passage 11 ... Washing Water outflow path, 12 …… Second injection port 13 …… Second washing water inflow path

Claims (2)

[Scope of utility model registration request] 1. A float valve body (4) which is interposed in the middle of a pipeline and which opens and closes communication with running water and is opened and closed by a float valve body (4) which is constrained by a guide in a valve box and can be raised and lowered. In the rapid air valve, the strainer case 8 is interposed between the repair valve 14 and the rapid air valve 1, and the strainer case 8 is directed toward the inner surface on the rapid air valve side of the strainer 7 that traverses the flow path in the strainer case 8. A plurality of injection ports 9 for injecting washing water are opened from the inner peripheral surface of the upper end of the valve body 16 and the valve body 16 in the repair valve 14 is opened.
A plurality of second injection ports 12 for injecting toward the outer surface of the strainer 7 on the side of the rapid air valve are opened at the center of the strainer 7, and pressure water is supplied to each of the injection port 9 and the second injection port 12 so as to be independently openable and closable. A rapid air valve equipped with a strainer, characterized in that a cleaning water inflow pipe (17) and a second cleaning water inflow passage (13) are connected to each other. 2. The opening / closing valve 18 and the strainer according to claim 1, wherein the cleaning water inflow pipe 17 connected to the strainer case 8 communicates with the inside of the repair valve 14, and the cleaning water inflow pipe 17 opens and closes the communication with the pipeline water. A second cleaning water inflow passage 13 communicating with the second injection port 12 is bored in the valve body 16 while interposing 19 and the second cleaning water inflow passage 13 and the repair valve 14 inside. A rapid air valve equipped with a strainer characterized in that a sub valve 25 communicating with the valve is opened and closed.