JPH09189072A - Vacuum transport device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact vacuum transport device which can scoop in contaminated water, etc., continuously and whose vacuum producing means is free from risk of sucking in the contaminated water. SOLUTION: A submerged pump 34 is installed in the lower part of a tank 33, and the tip of a suction pipe 21 is protruded in the middle in vertical direction of the tank 33, and a suction part 43 is installed in the upper part of the tank 33. A plate 35 is installed between the suction part 43 and the tip of the suction pipe 21 so that partitioning is made, and the airin the tank is sucked by a vacuum producing means 45 through an opening 38 in the plate 35. Most of the contaminated water, etc. dropped into the tank 33 and splashed runs against the plate 35 and precipitates so that it does not reach the suction part 43.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cleaning, inspecting, repairing and exchanging sewer pipes buried in the ground.
The present invention relates to a vacuum transfer device using a vacuum pump used for a circulation drainage device for sewage pipe work, etc. that prevents sewage and the like from flowing into the work section.

[0002]

2. Description of the Related Art Sediment, sludge and foreign matter are accumulated in a sewer pipe buried in the ground after many years of use. Therefore, it is necessary to remove and clean the accumulated sediment, sludge and foreign matter.

Further, the sewer pipe buried in the ground is subject to cracks and defective joints due to changes with time. Especially when the sewer pipe is a fume pipe, it corrodes and has holes.
For this reason, it is necessary to inspect the inside of the sewer pipe and periodically repair or replace it.

As described above, in order to clean, inspect, repair, replace, etc. the sewer pipe, equipment is inserted into the sewer pipe of the work section, or a worker enters and works. The use of sewage must be discontinued during the working period.

In order to solve this, for example, a circulating drainage system for sewer pipe work disclosed in Japanese Utility Model Publication No. 6-13890 is proposed.

As shown in FIG. 6, this circulation drainage system for sewer pipe work uses a portion 1a between the first manhole 2 and the second manhole 3 of the sewer pipe 1 as a working section, and below the working section. The upstream portion 1b and the downstream portion 1c of the water pipe 1a
A water-stopping plug 4 is provided to prevent sewage from flowing into the sewer pipe 1a of the working section.

The suction pipe 6 of the pump 5 installed on the ground is located in the upstream portion 1b, and the discharge pipe 7 of the pump 5 is located in the downstream portion 1c. The sewage, etc. is bypassed to the downstream side.

According to such a drainage system for drainage work, since sewage does not flow into the drainage pipe of the working section even if sewage is used, the drainage pipe of the working section is cleaned and inspected while using the sewage. Can perform work such as repair and replacement.

Since the above-mentioned circulation drainage system for sewer pipes sucks in and discharges (ie, conveys) sewage containing foreign matters,
A screen 8 is provided on the suction pipe 6 so that foreign matter contained in dirty water or the like is collected by the screen 8 so as not to be sucked into the pump 5.

Since the above-mentioned screen 8 is clogged, it is necessary to regularly clean or replace the screen 8, which is a troublesome work, and when cleaning or converting the screen 8, sewage flows out and odors are emitted. Since it leaks to the surroundings and is environmentally unfavorable, it is conceivable to use a vacuum transfer device instead of the pump 5.

As the above-mentioned vacuum transfer device, there is known a device in which a vacuum pump sucks dirty water or the like into the tank with a negative pressure in the tank and discharges the dirty water or the like in the tank using an underwater pump.

[0012]

A vacuum transfer device used for a circulation drainage device for sewer pipe work is capable of continuously sucking sewage in order to enable use of sewage, and is compact because it is installed on a road. Required to be present.

However, in the conventional vacuum transfer device, suction and discharge are alternately repeated, and a device for separating air and liquid is provided in the connection line between the tank and the vacuum pump so that the liquid is not sucked by the vacuum pump. In the former case, the sewage cannot be continuously sucked in, and in the latter case, the whole apparatus becomes large due to the apparatus for separating air and liquid.

Therefore, an object of the present invention is to provide a vacuum transfer device which can solve the above-mentioned problems.

[0015]

[Means for Solving the Problems and Actions / Effects] The first invention is to provide a submersible pump 34 in a lower portion of a tank 33, an intake portion 43 in an upper portion of the tank 33, and a suction pipe in an upper and lower intermediate portion of the tank 33. In the vacuum transfer device in which the distal end portion of 21 is projected, the discharge pipe 22 connected to the submersible pump 34 is projected to the outside of the tank 33, and the vacuum generating means 45 is connected to the suction portion 43, the suction portion 43 is The vacuum transfer device is characterized in that a large number of intake small holes 42 are formed in an annular intake chamber 41 along the inner surface of the tank 33.

According to the first invention, a large number of intake small holes 4 are provided.
The air in the tank 33 is sucked from the upper suction portion 43 by the vacuum generating means 45 through the annular suction chamber 41 provided with 2, and the inside of the tank 33 is sucked into the tank 33 by using the suction pipe 21 as a negative pressure. It is possible to discharge the sucked dirty water in the tank 33 to the outside of the tank 33 by the submersible pump 34. In the present invention, the intake portion 43 provided on the upper portion of the tank 33 is provided with a large number of intake small holes 42 on the inner surface of the annular intake chamber 41.
Therefore, there is no need for a large-scale device for separating air and liquid between the tank and the vacuum generating means.
Not only is the structure simple, but even if a large amount of air is sucked by the vacuum generating means 45, it is sucked from a large number of small suction holes 42 provided on the inner surface of the annular suction chamber 41, so it is sucked from one small suction hole 42. The amount of air to be discharged is very small and the flow velocity is slow, the dirty water in the tank 33 is not sucked from the intake small holes 42, and the vacuum generating means 45 is not stopped by the dirty water, so that the continuous operation is continuously performed. Can inhale dirty water.

In the second aspect of the invention, the submersible pump 34 is provided in the lower part of the tank 33, the intake part 43 is provided in the upper part of the tank 33, and the tip end part of the suction pipe 21 is projected to the upper and lower intermediate parts of the tank 33. In the vacuum transfer device in which the discharge pipe 22 connected to the pump 34 is projected to the outside of the tank 33 and the vacuum generating means 45 is connected to the suction part 43, the suction part 43 on the inner surface of the tank 33 and the tip part of the suction pipe 21. A plate 35 having an opening 38 is provided between the above and the inside of the tank 33, and the inside of the tank 33 is partitioned into an upper chamber 36 having an intake portion 43, a distal end portion of the suction pipe 21, and a lower chamber 37 having a submersible pump 34. It is a vacuum transfer device.

According to the second aspect of the invention, the air in the tank 33 is passed through the plate 35 having the opening 38 to the upper chamber 36.
Suction water is sucked into the tank 33 from the tip portion of the suction pipe 21 provided in the lower chamber 37 by sucking the vacuum generation means 45 from the suction portion 43 of the tank 33, and sucking the waste water in the tank 33. Tank 33 with submersible pump 34
Can be discharged outside. In the present invention, the tank 33 is partitioned by the plate 35 into the upper chamber 36 having the intake portion 43 and the lower end chamber 37 having the front end portion of the suction pipe 21 and the submersible pump 34, and the upper chamber 36 and the lower chamber 37.
Are connected to each other through the opening 38 of the plate 35, most of the sewage and the like that has fallen and scattered in the lower chamber 37 does not hit the plate 35 and fall into the upper chamber 36. It is possible to prevent the sewage and the like from being sucked together with the air from 43, so that the sewage and the like can be prevented from being sucked into the vacuum generating means 45. Further, since the plate 35 is provided, the distance between the liquid surface such as dirty water and the intake portion 43 can be reduced, and thus the height of the tank 33 can be reduced.

In a third aspect of the invention, a submersible pump 34 is provided in the lower portion of the tank 33, an intake portion 43 is provided in the upper portion of the tank 33, and the tip end portion of the suction pipe 21 is projected to the upper and lower intermediate portions of the tank 33 so that In the vacuum transfer device in which the discharge pipe 22 connected to the pump 34 is projected to the outside of the tank 33 and the vacuum generating means 45 is connected to the suction part 43, the projecting portion 21a of the suction pipe 21 is substantially vertical from the upper part of the tank 33. The vacuum transfer device is characterized in that it is projected into the tank 33.

According to the third aspect of the invention, the air in the tank 33 is sucked from the suction portion 43 by the vacuum generating means 45 to make the inside of the tank 33 a negative pressure so that sewage and the like is discharged from the upper portion of the tank 33 along the protruding portion 21a. It is possible to fall almost vertically and suck it into the tank 33, and drain the sucked dirty water in the tank 33 to the outside of the tank 33 by the submersible pump 34. In the present invention, the sewage discharged from the tip of the suction pipe 21 is directed away from the intake section 43 provided in the upper portion of the tank 33, so that the sewage is hardly sucked from the intake section 43. Further, since the air in the tank 33 also flows along the falling direction of sewage or the like, it is possible to prevent the sewage or the like from being sucked into the vacuum generating means 45 without being sucked by the air further sucked from the intake section 43. It can be prevented.

In a fourth aspect of the present invention, a submersible pump 34 is provided in the lower portion of the tank 33, an intake portion 43 is provided in the upper portion of the tank 33, and a tip end portion of the suction pipe 21 is protruded to an upper and lower intermediate portion of the tank 33. In the vacuum transfer device in which the discharge pipe 22 connected to the pump 34 is projected to the outside of the tank 33, and the vacuum generation means 45 is connected to the suction part 43, the receiving portion having a vertical cross section in the lower part of the tank 33. Member 47
Is provided so that the top portion 47a thereof is located directly below the tip end portion of the suction pipe 21.

According to the fourth aspect of the invention, the air in the tank 33 is sucked from the suction portion 43 by the vacuum generating means 45 to make the inside of the tank 33 a negative pressure and the dirty water and the like dropped from the tip of the suction pipe 21 are received by the receiving member. After hitting the top of 47, the flow momentum is reduced and sucked into the tank, and dirty water or the like can be discharged into the tank 33 by the submersible pump 34. In the present invention, the sewage and the like that has fallen from the tip of the suction pipe 21 is provided in the intake portion 43 provided in the upper portion of the tank 33.
It is possible to prevent sewage and the like from being sucked into the vacuum generating means 45 without splashing or scattering to the surrounding air.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION

(Structure of Circulation Drainage Device for Sewer Pipe Work) As shown in FIG. 1, a first sewer pipe 11 and a second sewer pipe 12 are opened in a first manhole 10, and a second sewer pipe 12 is a second sewer pipe. The third sewer pipe 14 opens into the manhole 13, the second manhole 13 opens into the third manhole 15, and the third sewer pipe 14 opens into the third manhole 15.
The sewer pipe 16 is open, and each sewer pipe is continuously buried in the ground through each manhole. Sewage or the like flows from the first sewer pipe 11 toward the fourth sewer pipe 16.

The third sewer pipe 14 serves as a working section,
The upstream side of the third sewer pipe 14, that is, the second sewer pipe 1
2, an upstream water stop plug 17 is provided on the outflow side that opens to the second manhole 13, and opens to the downstream side of the third sewer pipe 14, that is, the third manhole 15 of the fourth sewer pipe 16. A downstream water stop plug 18 is provided on the inflow side. This prevents sewage from flowing into the third sewer pipe 14, which is the working section, from the upstream sewer pipe.

It should be noted that the inflow side and the outflow side of the third sewer pipe 14 and the outflow side of the second sewer pipe 12 are not provided with the water stop plugs.
The reason why the water blocking plug is provided on the inflow side of the lower sewer pipe 16 is that the worker enters and leaves the second and third manholes 13 and 15 when working the third sewer pipe 14.

A vacuum transfer device 20 according to the present invention is installed on the ground, and a suction pipe 21 of the vacuum transfer device 20 is passed through a pipe 17a provided inside the upstream side water blocking plug 17 to a second lower part. The water pipe 12 is in open communication, and the discharge pipe 22 is in open communication with the fourth sewer pipe 16 through a pipe 18 a provided inside the downstream water stop plug 18.

A submersible pump, for example, a submersible grinder pump 23 is provided in the first manhole 10, and a discharge pipe 24 thereof is connected to the discharge pipe 22. Also, the second
A net 25 is provided on the inflow side of the sewer pipe 12 that opens to the first manhole 10.

(Operation of Circulation Drainage Device for Sewage Pipe Work) Since it is as described above, the sewage and the like flowing into the first manhole 10 and accumulated therein is sucked by the submersible grinder pump 23,
The water is discharged from the discharge pipe 24 through the discharge pipe 22 to the downstream side of the downstream water stop plug 18. The discharge pipe 24 of the submersible grinder pump 23 may be directly arranged on the sewer pipe on the downstream side of the downstream water stop plug 18. For example, the discharge pipe 24 is projected to the manhole downstream of the third manhole 15, and the manhole is drained to the sewer pipe.

Since the submersible grinder pump 23 has an excellent discharge capacity, it can pump sewage up to the ground even if the lift is large in a deep manhole. The submersible grinder pump 23 has the ability to crush large foreign matters such as wood chips. It does not clog because it has

A level sensor 27 is provided near the upstream side of the upstream water stop plug 17, and outputs a signal when the water level in the second drain pipe 12 reaches a predetermined height. The vacuum transfer device 20 is driven by this signal, and the sewage and the like in the second sewage pipe 12 is drained to the downstream side from the downstream water stop plug 18 through the pipe 17a, the suction pipe 21 and the discharge pipe 22, and the pipe 18a. To do.

In other words, even if wastewater such as sewage in the first manhole 10 is drained by the underwater grinder pump 23, sewage and the like flows from the drainage mass of each house into the second sewer pipe 12 through the drainage pipe 26. When a certain amount of sewage or the like is accumulated in the second sewage pipe 12, the vacuum transfer device 20 is driven to drain it.

(Structure of Vacuum Conveying Device) As shown in FIG.
A lower plate 32 is attached to the lower part of the tank 33 to form a sealed tank 33. A submersible pump 34 is attached to the central portion of the lower plate 32, and the discharge pipe 22 connected to the discharge port of the submersible pump 34 projects outside the cylinder body 30.

As shown in FIGS. 2 and 3, a plate 35 is fixed in parallel to the upper plate 31 and the lower plate 32 near the upper part of the inner surface of the cylindrical body 30, and the plate 35 forms an upper chamber 36 inside the tank 33. It is partitioned into the lower chamber 37. An opening 38 is formed in the center of the plate 35 to form an upper chamber 36.
And a lower chamber 37 are communicated with each other, and a ring-shaped downward piece 39 is provided on the lower surface of the opening edge of the opening portion 38 of the plate 35 to drain water.

As shown in FIGS. 2 and 3, a link body 40 having a hook shape in section and a ring-like plane shape is attached to the upper surface of the plate 35 and a portion of the inner surface of the cylindrical body 33 near the upper portion of the inner surface of the cylindrical body 33. The chamber 41 is formed. A large number of small intake holes 42 are formed on the inner surface 40a and the upper surface 40b of the ring body 40 to form an intake portion 43.

An intake pipe 44 is connected to the annular intake chamber 41, the intake pipe 44 is connected to the intake portion of the vacuum generating means 45, and an exhaust pipe 46 is connected to the exhaust portion of the vacuum generating means 45.
The exhaust pipe 46 is connected to the fourth sewer pipe 16 from the third manhole 15 shown in FIG.
The air is exhausted to the sewer pipe 16 of.

The suction pipe 21 is the upper plate 31 of the tank 33,
It penetrates through the plate 35 and projects into the lower chamber 37, and the projecting portion 21a is vertical. As shown in FIGS. 2 and 4, a receiving member 47 is attached to a portion of the lower plate 32 that faces the protruding portion 21a of the suction pipe 21. The receiving member 47 has a mountain shape with the one side piece 48 and the other side piece 49, and the top portion 47a thereof coincides with the center of the protruding portion 21a of the suction pipe 21. The receiving member 47 may have a conical shape. That is, the receiving member 47 may have a vertical cross-section that is substantially mountain-shaped.

An upper liquid level sensor 50 is provided near the upper part of the lower chamber 37 of the cylindrical body 33, and a lower liquid level sensor 51 is provided near the lower part. This upper liquid level sensor 5
0 is located below the lowermost portion (tip portion) of the protruding portion 21a of the suction pipe 21, and the lower liquid level sensor 51 is located above the discharge portion of the submersible pump 34.

As shown in FIG. 5, the level sensor 2
7. The signals from the upper liquid level sensor 50 and the lower liquid level sensor 51 are input to the controller 52, and the controller 52 drives the submersible pump 34 and the vacuum generating means 45 based on the input signals.

Specifically, when a signal is input from the level sensor 27, the controller 52 drives the vacuum generating means 45 to collect dirty water in the tank 33 so that the liquid level is higher than the height of the upper liquid level sensor 50. Then, the upper liquid level sensor 50 outputs a signal and the controller 52 drives the submersible pump 34,
When the liquid level in the tank 33 becomes lower than or equal to the lower liquid level sensor 51, the controller 52 stops the submersible pump 34.

Because of this, when the vacuum transfer device 20 is driven, the liquid level in the tank 33 is between the lower liquid level sensor 51 and the upper liquid level sensor 50.

(Conveying Operation by Vacuum Conveying Device 20) When the vacuum generating means 45 is driven, the air in the tank 33 is sucked through the intake pipe 44, the annular intake chamber 41, and the small intake hole 42 to make the inside of the tank 33 negative. Pressure. By this, the suction pipe 21
More dirty water is sucked into the tank 30.

As described above, the intake portion 43 is provided near the upper portion of the tank 33, the tip portion of the suction pipe 21 is located below the intake portion 43, and the annular intake chamber 4 is provided.
Since a large number of intake small holes 42 are formed on the inner surface 40a and the upper surface 40b of one, even if a sufficient amount of air is sucked by the intake pipe 44, the amount of air sucked from one intake small hole 42 is reduced. The amount is extremely small, the flow velocity is slow, and the dirty water in the tank 33 is not sucked from the small intake hole 42.

Further, the inside of the tank 33 is partitioned by a plate 35 into an upper chamber 36 and a lower chamber 37, the upper chamber 36 and the lower chamber 37 communicate with each other through an opening 38, and the upper chamber 36 is provided with an intake portion 43. However, since the tip of the intake pipe 21 projects into the lower chamber 36, most of the sewage and the like scattered when it falls into the tank 33 from the tip of the intake pipe 21 hits the plate 35 and falls downward. As described above, the scattered sewage or the like does not reach the intake portion 43 as described above, and liquid water or the like is not sucked into the vacuum generating means 45.
Further, since dirty water or the like attached to the lower surface of the plate 35 falls downward along the ring-shaped downward piece 39, it is prevented from flowing around the opening 38 toward the upper chamber 36.

Further, since the projecting portion 21a of the suction pipe 21 projects vertically into the tank 33 from the upper plate 31 of the tank 33, dirty water or the like from the suction pipe 21 passes through the projecting portion 21a and goes straight to the tank 33. Since it falls inside, dirty water or the like is not sucked by the flow of air sucked from the air intake portion 43.

Further, since the lower plate 32 of the tank 33 is provided with the mountain-shaped receiving member 47, and the dirty water and the like dropped from the suction pipe 21 is dropped to the top portion 47a of the receiving member 47, the spilled water and the like can be removed. Since it is reduced by the receiving member 47 and scattered, the sewage and the like will not be scattered to the suction portion 43.

Since the upper liquid level sensor 50 is provided and the submersible pump 34 is driven by a signal from the upper liquid level sensor 50, the liquid level of sewage in the tank 33 does not exceed the upper liquid level sensor 50. Since the liquid level sensor 50 is located below the tip of the suction pipe 21, dirty water or the like does not collect in the tank 33 at a height higher than the tip of the suction pipe 21.

The liquid level in the tank 33 is the submersible pump 3.
The submersible pump 34 is stopped by the signal from the lower liquid level sensor 51 when the position is below the suction part of No. 4, so that the submersible pump 34 does not suck air.

Further, since the opening portion 38 of the plate 35 is the central portion of the tank 33 and a large number of small intake holes 42 are formed along the inner surface of the annular intake chamber 41 of the intake portion 43, the tank In the lower chamber 37 of 33, air is stored in the tank 33.
Since air is evenly sucked along the inner surface, the air in the lower chamber 37 of the tank 33 is efficiently sucked by the vacuum generating means 45, and dirty water or the like can be sucked efficiently into the tank 33 through the suction pipe 21.

In addition, the intake part 43 is formed by forming a large number of small intake holes 42 on the inner surface of the annular intake chamber 41,
The inside of the tank 33 is covered by the plate 35 in the upper chamber 36 and the lower chamber 37
By partitioning into, it is possible to reliably prevent the vacuum generation means 45 from sucking dirty water or the like sucked into the tank 33.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a circulation device for sewer pipe work showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a vacuum transfer device.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a control circuit diagram.

FIG. 6 is an explanatory diagram of a conventional circulation device for sewer pipe work.

[Explanation of symbols]

 10 ... 1st manhole 11 ... 1st sewer pipe 12 ... 2nd sewer pipe 13 ... 2nd manhole 14 ... 3rd sewer pipe 15 ... 3rd manhole 16 ... 4th sewer pipe 17 ... Upstream side Water stop plug 18 ... Downstream water stop plug 20 ... Vacuum transfer device 21 ... Suction pipe 21a ... Projection part 22 ... Discharge pipe 33 ... Tank 34 ... Submersible pump 35 ... Plate 36 ... Upper chamber 37 ... Lower chamber 38 ... Opening Part 41 ... Annular intake chamber 42 ... Intake small hole 43 ... Intake part 44 ... Intake pipe 45 ... Vacuum generating means 47 ... Receiving member 47a ... Apex 50 ... Upper liquid level sensor 51 ... Lower liquid level sensor 52 ... Controller.

Claims (4)

[Claims] 1. A submersible pump (3) at the bottom of the tank (33).
4) is provided, an intake part (43) is provided above the tank (33), the tip of the suction pipe (21) is projected to the upper and lower intermediate parts of the tank (33), and connected to the submersible pump (34). In a vacuum transfer device in which a discharge pipe (22) is projected to the outside of a tank (33) and a vacuum generating means (45) is connected to the suction section (43), the suction section (43) is connected to the tank (33). A vacuum transfer apparatus, characterized in that a large number of intake small holes (42) are formed in an annular intake chamber (41) along an inner surface. 2. A submersible pump (3) at the bottom of the tank (33).
4) is provided, an intake part (43) is provided above the tank (33), the tip of the suction pipe (21) is projected to the upper and lower intermediate parts of the tank (33), and connected to the submersible pump (34). A vacuum transfer device in which a discharge pipe (22) is projected to the outside of a tank (33) and a vacuum generating means (45) is connected to the suction part (43), wherein the suction part (43) on the inner surface of the tank (33). A plate (35) having an opening (38) between the suction pipe (21) and an upper chamber (36) having an intake part (43) inside the tank (33). ) And a lower chamber (37) having a submersible pump (34). 3. A submersible pump (3) at the bottom of the tank (33).
4) is provided, an intake part (43) is provided above the tank (33), the tip of the suction pipe (21) is projected to the upper and lower intermediate parts of the tank (33), and connected to the submersible pump (34). In a vacuum transfer device in which a discharge pipe (22) is projected to the outside of a tank (33) and a vacuum generating means (45) is connected to the suction part (43), a protruding portion (21a) of the suction pipe (21) is Tank (3
A vacuum transfer device characterized in that it is projected substantially vertically from the upper part of 3) into the tank (33). 4. A submersible pump (3) at the bottom of the tank (33).
4) is provided, an intake part (43) is provided above the tank (33), the tip of the suction pipe (21) is projected to the upper and lower intermediate parts of the tank (33), and connected to the submersible pump (34). In a vacuum transfer device in which a discharge pipe (22) is projected to the outside of a tank (33), and a vacuum generating means (45) is connected to the suction part (43), a vertical cross section is substantially mountainous at the bottom of the tank (33). The top portion (47a) of the shaped receiving member (47) has a suction pipe (2).
A vacuum transfer device characterized in that it is provided directly below the tip of 1).