JP2012246941A - Header pipe and sewage pump facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a header pipe and a sewage pump facility, capable of reducing material cost and installation construction cost, improving construction performance and construction quality, and reducing maintenance management cost and repair construction cost as an effective space is secured.SOLUTION: Two inlet passages 11, 12 have respectively inlets ports directed downward. An outlet passage 21 has one outlet port directed upward, and is communicated with upper parts of the inlet passages 11, 12. Valve seats 7, 8 are provided in the respective inlet passages 11, 12. Ball valve bodies 2, 3 or cylinder valve bodies are movably provided between the outlet passages 21 in the inlet passages 11, 12 and the respective valve seats 7, 8, and constitute check valves for preventing a back flow from the outlet port to each inlet port together with the respective valve seats 7, 8. The inlet passage is provided with an air vent valve 22.

Description

  The present invention relates to a header pipe and a sewage pump facility.

  As shown in FIG. 6, the general pump facility mainly includes an inflow pipe 31, pumps 32 (two units), riser pipes 33 (two), check valves 34 (two sets), and air vent valves 35 (two sets). ), Stop valve 36 (two sets), header pipe 1 (one), and pressure feed pipe 37 (for example, in manhole pump stations, it is included in civil engineering work and often laid in advance) .

  For example, in the manhole pumping station, the construction error of the conventional header pipe (construction company side construction) and the pressure feed pipe (civil engineering company construction: laid) is different by one digit. There is a header pipe construction error of about several degrees and a pressure feed pipe construction error of about a dozen degrees in the misalignment angle between the header pipe core and the pressure feed pipe core. There is a difference of about several millimeters in pipe construction error and about several centimeters in pressure feeding pipe construction error. The construction error of the pressure feed pipe is often due to the construction error of manhole assembly, manhole cover position, laying pipe line and so on.

  In addition, 2 sets of guide pipes, 2 pump pulling chains, 2 sets of pump cables, 1 set of water level gauge, inflow baffle, steps, etc. are incorporated, so the effective space is narrow.

Sewer New Technology Promotion Organization Sewer Manhole Pump Facility Technical Manual June 1997 (P11 Figure 2-5 Example of pump equipment and assembly type manhole)

  As shown in FIG. 6, in the above-described conventional technology, there are many piping materials, which increases the material cost and the installation work cost.

  Due to the cause of the construction error, the connection work is very difficult, an unreasonable force is applied to the connected piping, and there is a problem in workability and construction quality.

  2 guide pipes, 2 pump pulling chains, 2 pump cables, 1 set of water level gauge, inflow baffle, steps, etc. are installed, and there are many accessories, so maintenance costs and repairs due to narrow effective space The construction costs also required significant costs.

  The present invention has been made paying attention to such a problem. By adding the functions of a check valve and an air vent valve to the header pipe, the check valve and the air vent valve become unnecessary. Moreover, since it is preferable not to submerge the valves, it is desirable to install the water stop valve in a non-submerged portion above the inflow pipe.

  However, unlike the swing type check valve, the ball type check valve has almost no troubles such as damage to the valve and biting of foreign matter. By connecting the header pipe directly to the pump outlet, one riser pipe is connected. The purpose is to provide a header pipe and sewage pump facility that can reduce material costs and installation costs, improve workability and construction quality, and reduce maintenance costs and renovation costs by securing effective space. .

  In order to achieve the above object, a header pipe according to the present invention has two inflow ports each having an inflow passage facing downward, and one outflow port having an outflow passage facing upward, and an upper portion of the inflow passage An outflow passage communicating with each other, a valve seat provided in each inflow passage, and a retreat passage in the upper part of the inflow passage and each valve seat. It has a ball valve body or a cylindrical valve body having a check valve function to prevent backflow to the inlet, and is characterized in that an air vent valve is provided so as to protrude in the lateral direction of the inflow path.

  In the header pipe according to the present invention, the air vent valve protrudes in the lateral direction upstream from the ball valve body seated on the valve seat, and opens and closes the air vent hole in the valve body housing portion having the air vent hole in the upper portion. It is preferable to have an air vent ball valve body provided as possible.

  The header pipe according to the present invention may be provided as a simple type so as to be movable in the inflow passage between the valve seats, with the ball valve body or the cylindrical valve body being one.

  The sewage pump facility according to the present invention includes a manhole, the header pipe provided inside the manhole, a submersible pump connected to each inlet and sending water inside the manhole to the inlet, and a flow of the header pipe It has a riser pipe connected to the outlet, and a water stop valve.

  In the present invention, the check valve and the air vent valve are eliminated, and the header pipe is provided with respective functions. The header pipe mainly includes three T-shaped pipes and two check valve function ball valve bodies or cylindrical valve bodies 2. And two ball valve bodies for air venting.

  The simple header pipe can be mainly composed of two bent pipes, one T-shaped pipe, and one check valve function ball or one cylindrical valve body.

  According to the present invention, by adding the check valve and air vent valve functions to the header pipe, the check valve and the air vent valve become unnecessary, and the riser pipes are combined into one so that the material cost and installation work can be reduced. It is possible to provide a header pipe and a sewage pump facility that can reduce costs, improve workability and construction quality, and reduce maintenance costs and renovation costs by securing an effective space.

It is a longitudinal cross-sectional view of the header pipe | tube of embodiment of this invention. (A) It is the sectional view on the AA line of FIG. (b) It is the longitudinal cross-sectional view which changed the ball valve body into the cylindrical valve body. It is a longitudinal cross-sectional view of the sewage pump facility of the embodiment of the present invention. (A) Plan view of a conventional sewage pump facility (b) FIG. 4 is a plan view of the sewage pump facility in FIG. 3. It is a longitudinal cross-sectional view which shows the simplified header pipe | tube of other embodiment of this invention. It is a longitudinal cross-sectional view of the conventional sewage pump facility.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a header pipe 1 according to an embodiment of the present invention. The check valve of the header pipe 1 is mainly composed of ball valve bodies 2 and 3, T-shaped pipes 1a, 1b and 1c, flanges 1d to 1h, mekura flanges 1i and 1j, outflow prevention rods 13 to 16, and flanges Are fastened with bolts and packings, respectively. The air vent valve mainly includes air vent ball valve bodies 17 and 18 and valve body storage portions 19 and 20.

  The header tube is not made of cast steel formed from lost wax castings, but can be processed with commercially available stainless steel pipes, so it can be easily manufactured, has a short production time, and is inexpensive to manufacture. Suitable for varieties and small volume production.

  The header pipe 1 is formed with inflow ports 5 and 6 on the primary side, and an outflow port 4 on the secondary side. Cylindrical valve seats 7 and 8 are provided in the vicinity of the inflow ports 5 and 6. , 12 are formed with retreat paths 9, 10 for retracting the ball valve bodies 2, 3. One end of the valve seats 7 and 8 is chamfered to receive the ball valve bodies 2 and 3 with the surface, thereby improving the sitting and making the ball valve bodies 2 and 3 stable. The inflow passages 11 and 12 have a minimum pressure loss due to the shape of the passage with few protrusions.

  The ball valve bodies 2 and 3 are inserted and accommodated from the retreat paths 9 and 10, and the ball valve body outer diameter is formed larger than the diameter of the valve seats 7 and 8 so as not to flow out to the inflow ports 5 and 6. Since the ball valve bodies 2 and 3 are rubber balls made of NBR or the like, there is no leakage, the operation sound is reduced, and since they are spherical, there is no entanglement of the fiber and the like and it is not closed.

  In order to guide the ball valve bodies 2 and 3 to the retreat paths 9 and 10 and prevent the outflow to the outflow port 4, outflow prevention rods 13 to 16 are provided to prevent outflow to the outflow port 4. The interval between the outflow prevention rods 13, 14 and 15, 16 is set smaller than the diameter of the ball valve bodies 2, 3 so as not to flow out to the outflow port 4, and the diameter of the set foreign matter is set to the same diameter as the inflow ports 5, 6. is doing.

 As described above, the header pipe 1 mainly includes the two inflow passages 11 and 12, the outflow passage 23, the valve seats 7 and 8, the ball valve bodies 2 and 3, the air vent ball valve bodies 17 and 18 and the valve. It has body storage portions 19 and 20. The two inflow channels 11 and 12 have inflow ports 5 and 6 facing downward, respectively, and the one outflow channel 23 facing upward has an outflow port 4 and communicates with the upper portions of the inflow channels 11 and 12. ing. The valve seats 7 and 8 are provided in the vicinity of the inflow passages 11 and 12.

  The ball valve bodies 2 and 3 are movably provided between the retraction paths 9 and 10 above the inflow paths 11 and 12 and the valve seats 7 and 8. The ball valve bodies 2 and 3 together with the valve seats 7 and 8 constitute a check valve that prevents backflow from the outlet 4 to the inlets 5 and 6. The air vent valve is provided so as to protrude in the lateral direction of the inflow passage.

  The air vent valve includes air vent ball valve bodies 17 and 18, valve body storage portions 19 and 20, and air vent holes 21 and 22. The valve body storage portion is provided so as to project laterally upstream from the ball valve bodies 2 and 3 and has an air vent hole at an upper portion thereof, and accommodates an air vent ball valve body provided so as to be able to open and close the air vent hole. ing.

  As shown in FIG. 3, the sewage pump facility mainly includes a manhole 30, a submersible pump 32 provided in the manhole 30, a header pipe 1, and a riser pipe 33 connected to the header pipe. The submersible pump 32 is connected to each of the inflow ports 5 and 6, and sends the sewage inside the manhole 30 to the inflow ports 5 and 6.

  In such a configuration, the seated ball valve bodies 2 and 3 are smoothly pushed up vertically by the discharge pressure (dynamic pressure) at the start of the pump and stored in the retreat spaces 9 and 10.

  When the pump is stopped, the ball valve bodies 2 and 3 stored in the retreat paths 9 and 10 start to drop due to their own weight set so as to overcome the backflow sewage discharge pressure (dynamic pressure) from the pressure feed pipe 37, From the middle of the descent, the backflow sewage discharge pressure (dynamic pressure) is also applied, and the valve seats 7 and 8 are securely pressed.

  Adopting a cylindrical valve body 3A instead of the ball valves 2 and 3 is also effective. The loss prevention plates 13 and 14 required for the ball valve body are not necessary, and unlike the ball valve body, a fine outer diameter machining can be easily performed, which is economical.

  Since the cylindrical valve body 3A has a low descending speed, there is little foreign matter biting, and there is an effect of reducing water hammer (water hammer) like a commercially available slowly closing check valve such as a counterweight type.

  The air vent valve includes air vent ball valve bodies 17 and 18 and valve body storage portions 19 and 20. In a state in which air is mixed upstream from the inflow passages 11 and 12, the air is continuously discharged from the air vent holes 21 and 22 until the pump discharge sewage is filled in the valve body storage portion, and the pump discharge sewage is When the valve body accommodating portions 17 and 18 are entered, the air vent ball valve bodies 17 and 18 are raised by the pump discharge pressure (dynamic pressure) and are pressure-bonded to the air vent holes 21 and 22. When the pump stops, the ball valve body falls by its own weight, returns to its original state, and a series of operations ends.

  The outer diameter of the air vent ball valve body is about 30 mm. The cylindrical inner diameter of the valve body storage portions 19 and 20 is about 40 mm, the diameter of the passage through which the valve body storage portions 19 and 20 communicate with the inflow passages 11 and 12 and the diameter of the air vent holes 21 and 22 are about 25 mm. Jumping out of the valve body storage parts 17 and 18 is prevented.

  As shown in FIG. 5, the simple header pipe has only a ball valve element 3 or a cylindrical valve element 3A and a valve seat 7, only with a function of preventing the backflow to other pumps that are not operated in the single pump alternate operation. The ball valve body or the cylindrical valve body may be movably provided between the valve seats 7 and 8 in the ball valve body inflow passages 11 and 12.

  By using the header pipe according to the present invention as shown in FIGS. 4 (a) and 4 (b), the rising angle of the rising pipe A can be freely set by using one rising pipe. The eccentric amount B of the riser 33 is also possible, and the construction error, which was a problem of the prior art, is absorbed, and the workability and construction quality are improved. As a result, excessive stress is not applied to the piping.

DESCRIPTION OF SYMBOLS 1 Header pipe 1a, 1b, 1c T-shaped pipe 1d-1g Flange 1h, 1i Mekura flange 2,3 Ball valve body 3A Cylindrical valve body 4 Outflow port 5,6 Inlet port 7,8 Valve seat 9,10 Retraction path 11, DESCRIPTION OF SYMBOLS 12 Inflow path 13,14,15,16 Outflow prevention rod 17,18 Air vent ball valve body 19,20 Valve body accommodating part 21,22 Air vent hole 23 Outflow path

30 Manhole 31 Inflow pipe 32 Pump 33 Rise pipe 34 Check valve 35 Air vent valve 36 Water stop valve 37 Pressure feed pipe

Claims (4)

  Two inflow passages each having an inflow port facing downward, one outflow passage having an upward outflow port communicating with an upper portion of the inflow passage, a valve seat provided in each inflow passage, and the inflow A ball valve body or a cylindrical valve that is configured to be movable between a retraction path at the top of the path and each valve seat, and constitutes a check valve together with each valve seat to prevent backflow from the outlet to each inlet. A header pipe, characterized in that an air vent valve is provided which protrudes in a lateral direction of the inflow passage.   The air vent valve includes a valve body housing portion having an air vent hole in an upper portion thereof, and an air vent ball valve body provided inside the valve body housing portion so that the air vent hole can be opened and closed. Item 1. A header tube according to item 1.   The header pipe according to claim 1, wherein the ball valve body or the cylindrical valve body is formed of one, and is provided so as to be movable in the inflow path between the valve seats.   A manhole, a header pipe according to claim 1, 2 or 3 provided inside the manhole, and a submersible pump connected to each inflow port and sending water inside the manhole to the inflow port and the outflow port A sewage pump facility comprising a connected riser.

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