JP2000080715A - Manhole pump system, height adjusting mechanism used therefor and universal joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manhole pump system capable of loading various kinds of equipment piping, etc., without requiring any means such as welding, etc., in the case the manhole pump system is constructed and having small pressure loss to facilitate the disassembly/assembly. SOLUTION: Soil water is led to the inside of a manhole main body 2 as a main section of a manhole pump system from an inlet pipe A, the soil water is pumped up with at least one sewage pump out of two underwater sewage pumps P1 and P2 arranged to the inside bottom section thereof, and it is pumped to a specific water supply part by a water supply pipe B provided to the outside by passing through a side wall of the manhole main body 2 through an outlet pipe 7, an adjusting pipe 8 and a collecting pipe 9. In that case, a piping is constituted of a synthetic resin pipe and, at the same time, the adjusting pipe 8 is so constituted that it can adjust the height. At least a universal joint 30 is provided to the front end of the collecting pipe 9, and the mounting direction between a horizontal pipe line connected to the water supply pipe B and the collecting pipe 9 is made adjustable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of laying sewer pipes on relatively uneven terrain.
The present invention relates to a manhole pump system that is applied to a case where sewage is pumped from a lowland to a highland, or a case where it is more efficient to pump a short distance due to a longer pipe length under natural flow.

[0002]

2. Description of the Related Art Wastewater treatment by sewerage is rapidly spreading in agricultural, mountain, and fishing villages. However, in agricultural, mountain, and fishing villages with complex terrain and houses with elevation differences,
Since the natural flow method alone is not sufficient, as shown in FIG. 5, sewage from the inflow pipe A is introduced into the manhole M by natural flow, and the sewage in the introduced manhole M is pumped up by the submerged sewage pump P to remove the manhole. A manhole pump system is used in which water is supplied to a water pipe B provided outside M and the water is fed to a predetermined water destination by the water pipe B.

In this manhole pump system, basically, an assembling manhole is installed on a public road or the like, and two detachable underwater sewage pumps are installed at an inner bottom of the manhole. In the state of the amount of water, one of them is used as a spare and the other one is used as a spare, and by alternately operating, the wastewater flowing into the manhole via the inflow pipe A is pumped up and pumped in a predetermined direction, When the amount of water flowing into the manhole increases and it becomes impossible to adjust the water level with only one underwater sewage pump (in a state where the water level exceeds the planned water level), another underwater sewage pump is used in combination.

The submersible sewage pumps, valves and other equipment used in this manhole pump system and the associated piping are in an environment where they come into contact with raw sewage and are easily corroded. In order to feed the water together with water without removing impurities, stainless steel materials are mainly used in consideration of the internal pressure received by the pump pressure.

[0005]

The equipment and piping in such a manhole pump system made of stainless steel are excellent in corrosion resistance, pressure resistance and the like.
On the other hand, since it is heavy, it has a problem in that it is extremely complicated to carry in, move, and attach it to the site, which requires labor. In addition, stainless steel pipes are expensive and welding is indispensable at the time of on-site construction, so the construction itself can not be handled by the level of water supply work, it requires cost to install a manhole pump system, and welding work in a narrow manhole Therefore, there is a problem that workability is poor. Also,
In piping work in a manhole, etc., it is inevitable that an error in construction will occur, but it is difficult to correct the stainless steel pipe.

Further, when sewage is supplied to the manhole above the planned water level, the sewage is pumped up by two submerged sewage pumps and sent out to a water pipe. The system adopts a system in which the pipe is connected to the water pipe, and is directly supplied to the pipe in a horizontal state in the manhole. That is, since the horizontal tank pipe and the vertical tank pipe communicate with each other in a substantially orthogonal state, a pressure drop occurs at the orthogonal section, which causes turbulence in the water flow and lowers the pump efficiency. Have the above problem.

In view of the above situation, the present invention does not require any means such as welding when mounting a submersible sewage pump or piping in a manhole, so that it can be used on a scale of a water supply work, and can be installed in a manhole. It is intended to provide a manhole pump system that is extremely easy to perform.

Another object of the present invention is to provide a manhole pump system capable of supplying water while minimizing pressure loss in a water supply path.

[0009]

In order to achieve these objects, a manhole pump system according to a first aspect of the present invention includes a manhole body having a required inner diameter and height having an inspection lid, and a manhole body mainly comprising the inspection hole. An inflow pipe for supplying sewage, a plurality of submerged sewage pumps installed near the inner bottom of the manhole main body, and a water supply pipe for supplying sewage pumped by the submerged sewage pump to a water pipe provided outside the manhole main body. When constructing the manhole pump system with the piping in the tank, all the piping in the tank is made of synthetic resin pipes, and the heights of the outlets of the plurality of submerged sewage pumps are adjusted by starting up the pipes at each outlet. Check valves and change valves are connected in sequence through the adjustment mechanism, and the sewage supplied from each change valve is collected by a collecting pipe of the required shape. A straight pipe in the tank is formed, and the upper end of the collecting pipe is connected to the water pipe provided outside the manhole main body through a pipe in the tank such as a universal joint and a bend pipe. Things.

The height adjusting mechanism used in the manhole pump system according to the third aspect of the present invention includes a manhole body having a required inner diameter and a height having an inspection lid, an inflow pipe for supplying sewage to the manhole body. A manhole comprising: a plurality of submerged sewage pumps installed near the inner bottom of the manhole main body; and an in-tank pipe for sending sewage pumped by the submerged sewage pump to a water pipe provided outside the manhole main body. In the pump system, an inner peripheral part near the lower end receives one end of a vertical tank pipe connected to the submerged sewage pump, and has an adjusting pipe of a required length equipped with a rubber ring for maintaining watertightness. A connecting short pipe having a lower end capable of receiving the upper end of the adjusting pipe in a watertight state, and having a flange on the outer periphery of the upper end opening; A band member for mounting fixed to the peripheral portion,
A pair of connecting rods having a base end held by the band member and having a thread formed at an upper end, a cylindrical nut having a required length to be engaged with the external thread of the connecting rod, and a flange of the connecting short pipe; And a pair of bolts of a required length that penetrate through the bolt insertion hole formed at the end and engage a male screw formed at the tip thereof with the cylindrical nut.

The universal joint used in the manhole pump system according to the ninth aspect of the present invention is a manhole main body having an inspection lid having a required inner diameter and height, and an inflow pipe for supplying sewage to the manhole main body. A plurality of submerged sewage pumps installed near the inner bottom of the manhole, and a pipe in a tank for supplying sewage pumped by the submerged sewage pump to a water pipe provided outside the manhole. In a manhole pump system, a collecting pipe having a required shape for collecting sewage pumped by each of the submerged sewage pumps, and a flanged joint having a spherical surface on an outer peripheral portion for receiving an upper short pipe of the collecting pipe in a watertight state. It has a main body and a plate portion to be joined to the flange of the joint main body, and can be overlapped with the spherical surface at a required interval. The sewage pumped by the holding member having a spherical portion and a connecting short pipe member having a spherical surface at a lower end portion interposed in a spherical gap formed between the joint body and the holding member is maintained in a watertight state. In a desired direction.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A manhole pump system according to the present invention basically includes a manhole body having a required inside diameter and a height having an inspection window that appears on the ground surface, and an inflow pipe for supplying sewage to the manhole body. And two underwater sewage pumps installed near the inner bottom of the manhole main body, and a pipe in the tank for sending sewage pumped by the submersible sewage pump to a water pipe provided outside the manhole main body. Be composed.

Each of the manhole bodies is made of concrete, and has a bottom plate having a required thickness and diameter, a plurality of cylinders stacked on the bottom plate, an adjusting cylinder provided at the top of the cylinder, and It consists of an inspection lid provided on the adjustment cylinder.
00-1800mm, height of each cylinder is usually 500-1
Each cylinder is sequentially stacked to a required height of about 250 mm.

The submersible sewage pump installed in the main body of the manhole basically has two pumps having the same capacity arranged near the inner bottom of the main body of the manhole, and has a diameter of about 50 to 150 mm. Basically, the pumps are operated alternately, but the manhole pump system is always operated automatically and unmanned, so if another failure occurs and the water level exceeds the planned water level, the other one will be driven. The number of submersible sewage pumps installed in the interior is determined by the size of the manhole, and may be two or more, three or four, or more.

The inflow pipe for supplying raw sewage into the main body of the manhole and the water pipe for sending sewage pumped by the submerged sewage pump to a required portion are made of a material having excellent corrosion resistance. It is preferable that a baffle plate is provided in the main body of the manhole, and the inflowing raw sewage is smoothly fed to the inner bottom.

A pipe in the tank for sending the inflowing raw sewage to the water pipe is provided with a vertical pipe in the tank for pushing up the sewage discharged from the submerged sewage pump to the upper part of the manhole, and a pipe perpendicular to the pipe in the tank. And a horizontal tank passage communicating with the water supply pipe in a state, and each of these tank passages is formed of a synthetic resin pipe, preferably a hard vinyl chloride resin pipe.

On the other hand, the height adjusting mechanism used in the manhole pump system of the present invention receives one end of a vertical tank passage connected to the submerged sewage pump at a lower end opening,
And an adjusting pipe fitted with a rubber ring for holding the pipe in the tank received at the lower end inner periphery in a watertight manner, and the upper end of the adjusting pipe is received in a watertight state in the lower end opening, and on the outer periphery of the upper end opening. A connecting short pipe having a flange, a band member mounted and fixed to the outer peripheral portion of the vertical in-tank pipe, and a pair of connecting rods having a base end held by the band member and having a thread formed at an upper end thereof. And a cylindrical nut having a required length to be engaged with the external thread of the connecting rod; and a male screw formed at a distal end portion of the cylindrical nut which penetrates a bolt insertion hole formed in a flange of the connecting short pipe. And a pair of bolts of a required length to be engaged with the bolt.

The adjusting tube constituting the adjusting mechanism has an outer peripheral portion near the lower end opening bulged outward integrally with the inner peripheral surface,
A rubber ring of a required shape is mounted in a concave portion formed on the inner peripheral surface, the upper end portion is reduced in diameter through a shoulder portion, and the outer peripheral surface of the opening is tapered so as to be inclined toward the opening edge side. .

In the connecting short pipe, a ring-shaped flange is integrally formed on the outer peripheral portion of the upper end of the cylindrical short pipe, and the flange and the outer peripheral portion of the short pipe are integrally connected by a reinforcing rib. In addition, the vicinity of the upper end of the short pipe is reduced in diameter through a step, and a bolt insertion hole is formed in the flange at a required interval.

The band member is attached to an outer peripheral portion of a vertical conduit in the tank by bolts, and a central portion of a band-shaped plate having a required width and length is curved into a semicircle to form a curved portion. Is formed of a pair of front and rear members formed with.

The connecting rod is provided with a screw rod having a thread formed at the upper end at the center of the upper edge of the plate-like body, and is integrally provided in a vertical state. An elongated hole is formed in the direction, so that the mounting width in the left-right direction can be adjusted within a required range.

The lower end of the cylindrical nut having the required length is engaged with a male screw formed at the distal end of the connecting rod. The upper end of the cylindrical nut is formed on the flange of the connecting short pipe. The tip of the bolt penetrating through the inserted bolt insertion hole is engaged, and when the bolt is tightened in a state where the band member is fixed to the outer peripheral portion of the vertical channel in the tank, the connecting rod and the bolt are connected in the cylindrical nut. As a result, the degree of insertion between the adjusting pipe and the pipe end of the vertical tank pipe connected to the submersible sewage pump is adjusted, and the height of the tank pipe can be freely adjusted. .

On the other hand, the universal joint used in the manhole pump system according to the present invention includes a collecting pipe having a required shape for collecting the sewage pumped by the respective submerged sewage pumps, and a watertight watertight pipe. It has a flanged joint body having a spherical surface on the outer periphery, and a plate portion joined to the flange of the joint body, and is provided with a required interval with respect to the spherical surface so as to be water-tightly overlapped. And a connecting short tube member having a spherical surface at a lower end portion interposed in a spherical gap formed between the joint body and the pressing member.

The lower branch pipes constituting the collecting pipe communicate with the upper end of the switching valve, respectively. There is no particular restriction on the crossing angle of each lower branch pipe, and the vertical branch pipes communicating with a plurality of submerged sewage pumps are not limited. Automatically determined by the distance between the pipes in the tank.

The universal joint connected to the upper short pipe of the collecting pipe is composed of a joint main body, a holding member and a connecting short pipe member. The joint main body has a cylindrical shape with a spherical surface formed on the outer periphery. The outer periphery of the short pipe is curved so that the arc becomes larger toward the top, forming a spherical surface, and a flange is integrally formed at the base end of the short pipe. With multiple bolt insertion holes,
A concave portion is formed in a ring shape on the outer periphery of the upper end of the spherical surface, and an O-ring is attached to the concave portion.

The holding member has a plate portion which is joined to the upper surface of the flange of the joint body, and has a spherical portion which can be overlapped at a required interval with respect to the spherical surface of the joint body. A bolt insertion hole corresponding to the bolt insertion hole formed in the joint body is also formed in the plate portion.

The connecting short pipe member is an inverted funnel-shaped one in which a spherical surface interposed in a spherical gap formed between the joint body and the holding member is integrally provided at a lower end of a cylindrical short pipe. The thickness of the spherical surface has substantially the same width as the gap formed between the joint body and the holding member, and the joint body, the holding member, and the connecting short pipe member are all assembled in a watertight state. It is.

[0028]

According to the manhole pump system of the present invention, a plurality of submerged sewage pumps installed near the inner bottom of the manhole are pumped up by a single or combined operation of a plurality of vertical sewage pumps arranged in the manhole. A horizontal tank line formed through a collecting pipe after passing through any one of the pipes in the tank (during operation of one of the submersible sewage pumps) or a plurality (during operation of the submersible sewage pump together) When penetrating through the side wall of the manhole and supplying water to a predetermined water supply destination with a water supply pipe arranged outside the manhole,
Since the pipes in the tank constituting the vertical and horizontal pipes in the tank both use synthetic resin pipes, the piping work can be easily carried out without any work such as welding.

In this case, the height of the vertical tank pipe constituting the pipe in the tank can be easily and easily adjusted, and the sewage pumped from the submerged sewage pump is passed through the vertical tank pipe. In supplying the water to the water pipe, the wastewater from the plurality of submerged sewage pumps is collected once and supplied to the water pipe using the collecting pipe, so that the wastewater can be efficiently supplied to the water pipe.

[0030]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a manhole pump system according to the present invention will be described.
Embodiments will be specifically described with reference to the accompanying drawings.
You. The manhole pump system 1 of the present invention is shown in FIG.
Basically, assembling type manhole main body 2,
An inflow pipe A for supplying raw sewage into the manhole main body 2,
Two underwater devices installed on the bottom of the manhole body 2
Sewage pump P₁And P _TwoAnd the submersible sewage pump P₁Or /
And P_TwoSewage pumped out by manhole 2
Water pipe B to be fed to
It is composed of a continuous pipe in the tank.

The manhole body 2 has, for example, a height of about 1
A plurality of concrete cylinders 2a having a size of 500 mm x an inner diameter of 1200 mm are sequentially stacked on a bottom slab 2b set on a base crushed stone, and an adjustment ring 2c having a height of 400 mm is provided on the uppermost cylinder 2a. An inspection lid 3 that appears on the ground surface is attached to the upper part of the body 2c so as to be freely opened and closed.

The two underwater sewage pumps P ₁ and P ₂ are installed at the inner bottom of the manhole body 2.
A slab 5 is provided to guide the inflowed sewage into the pit 4 by appropriately turning.

In the pit 4, a suction nozzle n provided below each of the submersible sewage pumps P ₁ and P ₂ is immersed therein.
This is for effectively sucking up sewage together with foreign substances.

The inflow pipe A is connected to a short pipe a fixedly penetrated to the side wall of the manhole main body 2 by a flexible pipe, and adjusts a slight displacement between the inflow pipe A and the inflow port of the manhole main body 2. The raw sewage from the inflow pipe A is configured so that the baffle plate 6 provided at the inflow port in the manhole main body 2 can reduce the momentum and flow in the wastewater appropriately. .

The water sewage pump P ₁ of the two manhole entity 2, P ₂ are each suction nozzle n and the motor M
By an elevator mechanism (not shown) is lowered hanging manhole mainly 2 seated in the vicinity of the bottom plate 2b, can be easily joined with the pipe at the outlet of the water sewage pump P _1, P ₂ this seat with, also, underwater sewage pump P _1, P
By pulling up ₂ , the pipe can be separated from the outlet pipe.

The outlet pipes 7 of the submerged sewage pumps P ₁ and P ₂ ,
Each of the outlet pipes 7 is vertically raised upward by a bend pipe, and the upper end of the raised outlet pipe 7 is inserted into a receptacle at the lower end of the adjusting pipe 8 to be tightly connected, and then checked above the outlet pipe 7. A valve C ₁ and a change valve C ₂ are sequentially installed, and then, at the upper end thereof, each submerged sewage pump P ₁ ,
The collecting pipe 9 of the inverted Y-shaped in order to merge the sewage pumped by the P ₂ provided, perpendicular intracisternal line piping from the outlet of the water sewage pumps P _1, P ₂ up to the collecting pipe 9 It was done.

The upper end of the collecting pipe 9 is bent at a right angle by a bend pipe 10, and then a connecting pipe 11 and a connecting pipe 12 provided with a rubber ring for holding one end of the connecting pipe 11 in a watertight state. , A horizontal pipe in the tank is formed by the universal joint 13 and the connecting pipe 14 communicating with the water supply pipe B, and the vertical pipe in the tank and the horizontal pipe in the tank intersect at right angles by the universal joint 13. It is configured such that the mounting position of can be adjusted within a required range.

The inflow pipe A, the pipe in the manhole main body 2 and the water supply pipe B are composed of a hard vinyl chloride resin pipe in principle.

As shown in FIG. 2, the adjusting tube 8 has a cylindrical shape as a whole. The outer peripheral portion near the lower end is swelled outward integrally with the inner peripheral surface by blow molding to form an inner peripheral surface. A rubber ring R of a required shape is mounted in the concave portion formed at the same time, and the upper end is gently reduced in diameter via the shoulder 8a.
An outlet pipe 7 that is tapered so that the outer peripheral surface of the opening is inclined toward the opening edge, and communicates with a submerged sewage pump.
Is held in a watertight state by the rubber ring R.

[0040] The upper end of the adjusting tube 8 intended to communicate with the check valve C ₁ via a short connection pipe 15, the short connection tube 15 is cylindrical in the upper end outer peripheral portion of the short pipe 15a ring-shaped flange 15b And the inner peripheral surface near the upper portion of the cylindrical short tube 15a is reduced in diameter through a step, the upper end of the adjusting tube 8 is received, and the opening edge is closely attached to the step. By doing so, a watertight state can be maintained.

The adjusting pipe 8 has a required length, and is configured so that the overall height of the vertical tank pipe can be adjusted by adjusting the receiving depth of the outlet pipe 7. The adjusting mechanism for adjusting the height is a band member to be attached and fixed to the outer peripheral portion of the adjusting pipe 8, the connecting short pipe 15, and the outlet pipe 7 constituting the vertical tank pipe. 16, the base end portion is held by the band member 16,
A pair of connecting rods 17 each having a thread formed at an upper end thereof, a cylindrical nut 19 having a required length to be engaged with the external thread 17c of the connecting rod 17, and a bolt inserted through a flange 15b of the connecting short pipe 15. It consists of a pair of bolts 20 of a required length that penetrates the hole 15 c and engages a male screw formed at the tip with the cylindrical nut 19.

The band member 16 is, as shown in FIG.
A pair of strips 16a, 16b having the required width and length
Is bent in a semicircular shape to form a curved portion 16c, and through-holes for bolt insertion are formed in the straight portions at both ends, so that each curved portion 16c is connected to the outlet tube 7c. Is tightened to the outer peripheral portion by a bolt 18 and a nut 18a.

At this time, the base ends 17a of the pair of connecting rods 17 are held between the pair of band-shaped plates 16a and 16b. The base end portion 17a is formed of a plate-like body, and a hole for inserting the bolt 21 is formed in each of the plate-like bodies. At least one of the holes has a lateral direction as is clear from FIG. The long hole 17b is used.

A cylindrical nut 19 is engaged with a male screw 17c at the upper end of the connecting rod 17 whose base end 17a is held by the band member 16, and the cylindrical nut 19 and the flange of the short pipe 15 which is always connected. 15b so as to be located below 15b.
The length has been adjusted.

In this state, the bolt 20 is inserted from above the flange 15 b of the short connection pipe 15, and the external thread 20 a of the bolt is engaged with the cylindrical nut 19. In this case, of course, the external thread 17c of one connecting rod 17 is used.
Is a right-hand thread and the other male thread 20a of the other bolt 20 is a left-hand thread. A kind of turnbuckle is formed by the above-mentioned connection, and the band member 16 is turned by turning the cylindrical nut 19 or the bolt 20. And the distance between the short pipe 15 and the flange 15b of the connection short pipe 15 can be adjusted. In the figure, 22 is a the check valve C ₁ and integral flange.

[0046] wherein the vertical upper held and adjusting tube 8 by the height adjusting mechanism, a flange for preventing the backflow of water into the water sewage pump P ₂ in the stop underwater sewage pump P ₁ during operation Check valve C ₁ and a change valve C comprising a ball valve with a flange for switching the sewage path and stopping water when checking the check valve C _1.
2 is connected.

The lower branch pipe 9a of the change valve C ₂ of the upper end side collecting pipe 9, as is apparent from FIG. 1, 9b and is flanged, thereby enabling merging of sewage from water sewage pump P _1, P ₂ I have.

As can be seen from FIG. 4, the branch pipe 9 has a bifurcated lower branch pipe 9a, 9b, which forms an inverted Y-shape as the angle of the center line of the pipe diameter, and is uniformly bent inward at an angle of 45 °. However, the head crosses at an angle of 90 ° at the upper end portion, whereby the head loss caused by the merge of the sewage is effectively suppressed.

The upper short pipe 9c above the collecting pipe 9 has
A bend pipe 10 bent at an angle of 90 ° is provided via a tubular universal joint 30 described below.

As shown in FIG. 4, the universal joint 30 has a receiving portion 3 for receiving the upper short pipe 9c of the collecting pipe 9 therein.
1b, and the outer peripheral portion is curved in an arc shape to form a spherical surface 3
1a, a joint body 31 having a flange 31c, and a plate portion 32 overlapping the flange surface of the joint body 31.
b, a restraining member 32 having a spherical portion 32a that can be overlapped with the spherical shape 31a while maintaining a predetermined gap, and a spherical gap formed between the joint body 31 and the restraining member 32 And a connecting short pipe member 33 having a spherical lower end portion 33a interposed in the X. The connecting short pipe member 33 has a spherical lower end portion 33a having the joint main body 31.
And the holding member 32 so as to be able to turn at a swing angle within a predetermined range.

An upper short pipe 9a above the collecting pipe 9 is fitted and held in the joint body 31, and a bend pipe 10 bent at an angle of 90 ° is attached to the upper end of the connecting short pipe member 33. The direction of the bend tube 10 can be freely changed within a predetermined range from a horizontal direction to an obliquely upward direction.

The swing angle of the connecting short tube member 33 is
Inclined surface 32c formed inside the opening edge of holding member 32
Therefore, the swing angle can be adjusted by freely selecting the inclination angle of the inclined surface 32c. A spherical lower end 33 of the connecting short pipe member 33 is provided on the outer periphery of the spherical surface 31a of the joint body 31.
An O-ring 34 is mounted to keep the connection with the “a” watertight.

The bend tube 10 bent at an angle of 90 ° as described above.
Is horizontally connected by a connection pipe 11, a connection pipe 12 having a rubber ring for holding one end of the connection pipe 11 in a watertight state, a universal joint 13 and a connection pipe 14 communicating with the water supply pipe B. The universal joint 13 is configured so that the mounting position of the vertical tank pipeline and the horizontal tank pipeline that intersect at right angles by the universal joint 13 can be adjusted within a required range. ing.

The horizontal conduit in the tank having such a configuration can have its directionality determined within a predetermined range by the universal joint 13 and the connecting pipe 12, so that a space entering a manhole for work is avoided. The structure of the universal joint 13 is basically the same as that of the universal joint 30 described above.

In the above embodiment, the manhole body 2
The number of the submersible sewage pumps arranged in the inside is described as two, and the shape of the collecting pipe 9 is described as an inverted Y-shape. It is natural that the shape of the collecting pipe differs depending on the number of submerged sewage pumps installed.

[0056]

The manhole pump system according to the present invention comprises an assembled manhole body, an inflow pipe for supplying sewage to the manhole body, and a plurality of submerged sewage pumps installed near the inner bottom of the manhole body. In constructing a manhole pump system with a pipe in a tank for sending sewage pumped by the submerged sewage pump to a water pipe provided outside the manhole main body, all of the pipes in the tank were made of synthetic resin pipes. By using flanged joints for each synthetic resin pipe, piping work can be performed without any welding means, greatly shortening the manhole pump system construction period and building it at economical cost. Can be.

In the construction of a vertical pipe in the tank from the outlet of the submerged sewage pump to the collecting pipe, a height adjusting mechanism is interposed in the middle of the pipe, so that the pipe is assembled. Even if there is some error in the height dimension between the height of the manhole and the outlet of the submersible sewage pump, the error can be easily and easily absorbed to construct the piping in the tank.

Further, even if a plurality of submerged sewage pumps are operated simultaneously when sewage of a planned water level or more flows into the manhole, sewage pumped from each submerged sewage pump is merged into one through a collecting pipe. Since the water is supplied to the water pipe later, the head loss is suppressed and the pumping efficiency of the submersible sewage pump is not impaired.

Further, in the construction of the piping in the tank, a universal joint is interposed at the connection portion between the vertical piping in the tank and the horizontal piping in the tank. Even if there is a slight error in the mounting angle between the tank and the pipe inside the tank, the error can be easily absorbed and there is no risk of disturbing the piping work. , Making internal inspections and other operations more advantageous.

The height adjusting mechanism used in the manhole pump system according to the present invention is mounted and fixed to an adjusting pipe of a required length, a connecting short pipe joined to the adjusting pipe, and an outer peripheral portion of a vertical pipe line in the tank. A band member, a pair of connecting rods whose base ends are held by the band member, a cylindrical nut of a required length engaging with the external thread of the connecting rod, and a flange of the connecting short pipe, With a very simple configuration consisting of a pair of bolts of a required length for engaging a male screw formed at the tip with the cylindrical nut, the height of the vertical tank line can be freely adjusted. .

The universal joint used in the manhole pump system according to the present invention includes a collecting pipe having a required shape for collecting sewage pumped by a plurality of submerged sewage pumps, a flanged joint body communicating with the collecting pipe. A very simple structure comprising a holding member disposed on the joint body at a required interval and a connecting short pipe member interposed in a gap formed between the joint body and the holding member. Thereby, the connection between the horizontal tank pipe and the vertical tank pipe can be smoothly performed.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a manhole pump system of the present invention.

FIG. 2 is a schematic explanatory view of a height adjusting mechanism used in the manhole pump system of the present invention.

FIG. 3 is a sectional view of a main part of the height adjusting mechanism shown in FIG. 2;

FIG. 4 is a sectional view of a main part of a universal joint used in the manhole pump system of the present invention.

FIG. 5 is an explanatory diagram of a conventional sewer pump system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Manhole pump system 2 Manhole main body 3 Inspection window 7 Outlet pipe 8 Adjusting pipe 9 Collecting pipe 10 Bend pipe 13, 30 Universal joint 15 Connection short pipe 16 Band member 17 Connecting rod 19 Cylindrical nut 20, 21 Bolt 31 Joint body 32 Holding member 33 connecting the short pipe member A inlet pipe B the water pipe P _1, P ₂ water sewage pump

Claims (9)

[Claims] 1. A manhole main body having a required inside diameter and height having an inspection lid, an inflow pipe for supplying sewage to the manhole main body, and a plurality of submerged sewage pumps installed near an inner bottom of the manhole main body. When constructing a manhole pump system with a pipe in a tank for sending sewage pumped by the submersible sewage pump to a water pipe provided outside the manhole, all the pipes in the tank are made of synthetic resin pipes. A check valve and a change valve are sequentially connected via an adjusting mechanism for adjusting the height of the outlets of the plurality of submerged sewage pumps by starting up the pipes, and the sewage supplied from each change valve is formed in a required shape. To form a vertical pipe in the tank, and connect the upper end of the pipe with a manhole through a pipe in the tank such as a universal joint and a bend pipe. Manhole pump system, characterized by being configured to connect to the water pipe provided outside the body. 2. The in-tank pipe is made of a synthetic resin pipe, has a flange joint, and has a structure that can be disassembled and assembled freely and can be connected in a watertight manner. Item 4. The manhole pump system according to Item 1. 3. A manhole main body having a required inner diameter and height having an inspection lid, an inflow pipe for supplying sewage to the manhole main body, and a plurality of submerged sewage pumps installed near an inner bottom of the manhole main body. A manhole pump system comprising: an in-tank pipe for sending sewage pumped by the submersible sewage pump to a water supply pipe provided outside the manhole main body; a vertical line connected to the submersible sewage pump at an inner peripheral portion near a lower end. It has an adjusting pipe of a required length equipped with a rubber ring for receiving one end of a pipe inside the tank and keeping it watertight, and a lower end capable of receiving the upper end of the adjusting pipe in a watertight state. A connection short pipe having a flange on the outer periphery of the upper end opening; a band member attached to and fixed to the outer periphery of the vertical tank pipe; a base end held by the band member; A pair of connecting rods having a male thread formed thereon, a cylindrical nut having a required length to be engaged with the external thread of the connecting rod, and a bolt insertion hole formed in a flange of the connecting short pipe, and a distal end portion thereof. A height adjusting mechanism for use in a manhole pump system, comprising a pair of bolts of a required length for engaging the formed male screw with the cylindrical nut. 4. The adjusting tube according to claim 1, wherein an outer peripheral portion near a lower end opening is bulged outward integrally with an inner peripheral surface, and a rubber ring having a required shape is mounted in a concave portion formed on the inner peripheral surface. The height adjustment mechanism used for the manhole pump system according to claim 3, characterized in that: 5. The adjusting tube according to claim 3, wherein an upper end portion is reduced in diameter through a shoulder portion, and the outer peripheral surface of the opening portion is tapered so as to be inclined toward an opening edge side. A height adjustment mechanism used in the manhole pump system according to the above item. 6. The connecting short pipe has a ring-shaped flange integrally formed on an outer peripheral portion of an upper end of a cylindrical short pipe, and a diameter near an upper end of the short pipe is reduced through a step. The height adjusting mechanism according to claim 3, wherein a bolt insertion hole is formed in the flange at a predetermined interval. 7. A band member comprising a pair of front and rear members having a curved portion formed by bending a central portion of a band-shaped plate having a required width and length into a semicircular shape. A height adjustment mechanism used in the manhole pump system according to the above item. 8. The connecting rod is provided with a screw rod having a thread formed on an upper end at a central portion of an upper edge of the plate-like body, and is integrally provided in a vertical state. The height adjusting mechanism used in the manhole pump system according to claim 3, wherein a long hole is formed in the manhole pump system. 9. A manhole main body having an inspection lid having a required inner diameter and height, an inflow pipe for supplying sewage to the manhole main body, and a plurality of submerged sewage pumps installed near an inner bottom of the manhole main body. And a pipe in the tank for sending sewage pumped by the submersible sewage pump to a water pipe provided outside the manhole main body, wherein the sewage pumped by each of the submersible sewage pumps is integrated into one. A collecting pipe having a required shape to be assembled, a joint body with a flange having a spherical surface on an outer peripheral portion for receiving an upper short pipe of the collecting pipe in a watertight state, and a plate portion joined to the flange of the joint body; A holding member having a spherical portion that can be overlapped with a required interval with respect to the spherical surface, and a spherical member formed between the joint body and the holding member. Universal joint using the wastewater that is pumped by the short connection tube member having a spherical surface on the lower end portion to be interposed manhole pump system characterized in that to maintain the watertight configured to send out a desired direction between.