JP3749407B2 - Blockage avoidance type pump gate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pump gate having a pump that opens and closes a water channel and drains water on one side of a closed water channel to the other side, and in particular, avoids blockage in which the pump is provided with a non-clog type or screw type spiral pump. It relates to a mold pump gate.
[0002]
[Prior art]
Conventionally, for example, in a place where a tributary flows into a river (main stream), a gate for opening and closing the tributary is installed on the tributary side. When the river increases due to heavy rain or the like, the river is prevented from flowing back to the tributary by closing the gate. On the other hand, the water that flows from the upstream of the tributary when the gate is closed is forcibly drained to the river side (downstream side) by the pump.
[0003]
Among these types of gates, in order to save space, there is a pump gate having a structure in which the drain pump is attached to the gate itself.
[0004]
However, the conventional pump gate has a structure in which water flows between the impellers of the rotating pump regardless of whether the vertical pump or the horizontal pump is used as the pump. Then, if large dust is sucked in, the impeller becomes clogged and breaks down. For this reason, a large-scale dust removal facility (automatic dust remover or the like) must be installed on the upstream side of the pump gate, resulting in high construction costs and operation costs.
[0005]
[Problems to be solved by the invention]
Therefore, in view of the above points, a vortex pump gate 200 using a vortex pump as shown in FIG. 9 is conceivable as a pump gate that can drain even a large garbage and simplify or omit the dust removal equipment. The vortex pump gate 200 is provided with an impeller housing portion 217 at a lower portion of a flow passage casing 215 attached to the frame body 35. The impeller 219 is housed in the impeller housing portion 219 and driven by a submersible motor 223. 14 is configured to pump water to the flap valve 227 for drainage. However, this vortex pump gate 200 is superior in terms of non-blocking property, but has a relatively low pump efficiency and is not suitable for drainage at a high head, and the impeller housing portion outside the flow path casing 215. Since it is necessary to have 217, the pump gate facility itself has a drawback of increasing the size.
[0006]
Therefore, the object of the present invention is not only to simplify or omit the dust removal equipment, but also to drain even large dust, and to drain water with higher efficiency and higher head than the vortex pump gate, or to make the gate equipment itself compact. It is to provide a pump gate capable of achieving the above.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention uses a non-clog pump or a screw-type centrifugal pump as a pump gate pump , and the non-clog pump or the screw-type centrifugal pump has a rotation axis of an impeller as a horizontal axis. By installing in such a manner, the impeller avoiding type pump gate was configured by being attached to the pump gate so that the rotating surface of the impeller was substantially parallel to the surface of the pump gate .
The blockage avoidance type pump gate does not reach the non-blocking property of the pump gate using the vortex pump, but has a high blockage avoidance property, and the non-clog pump gate can reduce the size of the gate itself. The gate has high efficiency and high head performance.
Further, the blockage avoidance type pump gate according to the present invention is such that the non-clog pump or the screw-type spiral pump includes a casing that forms a pump flow path, and an impeller is housed in a lower portion of the casing, A drive means for rotationally driving the impeller is attached to the outside of the accommodated casing.
Further, the blockage avoidance type pump gate according to the present invention incorporates a drain pump into the gate itself for opening and closing the water channel, and the water on one side of the closed water channel is operated by operating the pump with the water channel closed by the gate. In the pump gate configured to drain water, a non-clog pump or a screw-type centrifugal pump is used as the pump, and the non-clog pump or the screw-type centrifugal pump includes a casing that forms a pump flow path. The impeller is housed in the casing, and driving means for rotationally driving the impeller is attached to the outside of the casing housing the impeller.
Moreover, the blockage avoidance type pump gate according to the present invention is characterized in that the drive means is configured to contact river water downstream of the blockage avoidance type pump gate.
Also, in the blockage avoidance type pump gate according to the present invention, the drive means is installed at a position below the discharge port at the end of the pump flow path and where drainage discharged from the discharge port is applied. Features.
The material of the impeller of the non-clog pump or screw spiral pump may be an elastic material. The impeller shape of the pump may be a single blade or a plurality of blades.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing a non-clog pump gate 100 according to a first embodiment of the present invention, and FIG. 2 is a perspective view of the non-clog pump gate 100 as viewed from the opposite side. As shown in both figures, the non-clog pump gate 100 is configured by connecting and fixing two unit-type non-clog pumps 10 and 10 of the same standard in parallel and attaching frame members 40 and 40 to both sides thereof. A non-clog pump N is used as a drainage pump attached to each of the unit-type non-clog pumps 10, 10. Each component will be described below.
[0009]
3A and 3B are diagrams showing a single unit type non-clog pump 10, in which FIG. 3A is a schematic sectional side view, and FIG. 3B is a schematic sectional view taken along line AA in FIG. FIG. 4 is a perspective view showing a state in which the upstream surface of the frame 35 is cut away in one unit type non-clog pump 10 in the state shown in FIG.
[0010]
As shown in FIGS. 3, 4, 1, and 2, this unit type non-clog pump 10 has a pump flow path (suction flow path 29) in the back side of a box-shaped frame 35 that is open on the downstream side. And the casing 15 forming the discharge flow path 31), the impeller 19 is housed in the lower part of the casing 15, and the speed reducer 21 is attached to the outside of the impeller housing portion so as to be connected to the impeller 19; A submersible electric motor (driving means) 23 is mounted on the speed reducer 21, and a suction port 14 is provided in a portion of the frame body 35 facing the impeller 19 to constitute a non-clog pump N. A backflow prevention valve (flap valve) 27 is attached to the discharge port 25 at the end of the discharge channel 31. The impeller 19 may be a single blade or a shape having a plurality of blades.
[0011]
Here, the impeller 19 is installed so that the rotation shaft 20 thereof is a horizontal axis (horizontal), so that the rotation surface of the impeller 19 is on the surface of the frame 35 (that is, the surface of the non-clog pump gate 100). It is made to be substantially parallel to the line. Since the diameter of the impeller 19 is large in the non-clog pump N, the thickness of the frame body 35 (that is, the thickness of the non-clog pump gate 100) is increased when the impeller 19 is installed so that the rotation shaft 20 is vertical (vertical). It becomes considerably thicker and the weight is increased, and the pump gate equipment is enlarged accordingly, and the construction cost of the pump gate is increased. Therefore, in this embodiment, the impeller 19 is installed as described above, thereby reducing the thickness of the entire frame 35 (that is, the entire non-clog pump gate 100), reducing its weight, and reducing the size of the pump gate equipment. The construction cost was also reduced.
[0012]
Further, the submersible electric motor (driving means) 23 in this embodiment is configured so as to protrude from the downstream surface of the frame body 35 so as to be in contact with the downstream river water, and at the same time, the reverse flow. The prevention valve 27 is opened and the drainage discharged from the discharge port 25 is placed, that is, below the discharge port 25.
[0013]
Then, the non-clog pump gate 100 is lowered into the water channel 1 by the vertical driving means (not shown) provided above the lifting members 41, 41 shown in FIG. 1 to close the water channel 1, and the water channel 1 flows backward from the downstream side. Block incoming water. At this time, the backflow prevention valve 27 remains closed. On the other hand, in order to drain the water flowing from the upstream side to the downstream side, when the impeller 19 is rotated by driving the underwater motor 23 shown in FIG. 3, centrifugal force is applied to the fluid in the space in which the impeller 19 is accommodated. The upstream water that is generated and pumped by the centrifugal force and sucked from the suction port 14 is drained downstream by opening the backflow prevention valve 27 from the discharge port 25 via the suction flow channel 29 and the discharge flow channel 31. .
[0014]
Here, since the non-clog pump N having a large passage area in the impeller is used as a drainage pump in the present invention, even if a large dust is sucked together with water from the suction port 14, this dust is not between the impeller 19. Then, the centrifugal force is applied to the discharge passage 31 and drained as it is, so that even large dust can be drained without clogging the pump. Therefore, installation of a large dust removal facility (automatic dust remover, etc.) that has conventionally been required to be installed upstream of the non-clog pump gate 100 can be simplified or omitted, thereby reducing construction cost and operation cost. .
[0015]
As described above, when the non-clog pump N is used as a pump incorporated in the pump gate, the non-blocking property is slightly inferior to that of the vortex pump, but the height of the head is increased and the efficiency is improved. In addition, the motor efficiency is reduced by improving efficiency, the external impeller housing is not required compared to the vortex pump gate, and the impeller manufacturing cost is lower than that of the screw type spiral pump. , Lighter weight, lower price, and more compact. Therefore, this non-clog pump is most suitable when particularly compact, light weight and low price are required.
[0016]
FIGS. 5A and 5B are perspective views showing screw type spiral pump gates 100-2a and 100b according to the second embodiment of the present invention, respectively. In these embodiments, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In the figure, the difference from the above embodiment is that a screw-type spiral pump S is used instead of the non-clog pump N as a pump for drainage.
[0017]
FIG. 6 is a diagram showing one unit-type horizontal-axis screw-type centrifugal pump 10-2a used in the screw-type centrifugal pump gate 100-2a shown in FIG. 5A. FIG. FIG. 6B is a perspective view of the frame body 35 of one unit-type horizontal-axis screw spiral pump 10-2a in the state shown in FIG. 6A. FIG. 7 is a diagram showing one unit type vertical screw type centrifugal pump 10-2b used in the screw type centrifugal pump gate 100-2b shown in FIG. 5B. FIG. 7B is a cross-sectional view, FIG. 7B is a view as seen from the front of the frame body 35, and FIG. 7C is a view as seen from the discharge side.
[0018]
As shown in FIGS. 5, 6, and 7, these unit type screw type centrifugal pumps 10-2 a and 10-2 b accommodate the impeller 19-2 of the screw type centrifugal pump S in the casing 15, A reduction gear 21 is attached to the outside of the impeller housing so as to be connected to the impeller 19-2, an underwater electric motor (drive means) 23 is attached on the reduction gear 21, and the impeller 19- of the frame 35 is attached. A suction port 14 is provided in a portion facing 2 to configure a screw type spiral pump S. This screw type centrifugal pump S is a pump having a special single-blade impeller 19-2 in which a screw and a centrifugal blade are integrated, and foreign matter is axially centered on the suction side tip of the impeller 19-2. This has the effect of guiding to the side, and the introduced foreign matter is reliably discharged on the blade. The impeller 19-2 may be installed so as to be either an orthogonal axis or a parallel axis with respect to the surface of the pump gate. The impeller shape may be a single blade or a shape having a plurality of blades.
[0019]
Then, when the underwater motor 23 is driven to rotate the impeller 19-2, a centrifugal force is generated in the fluid in the space in which the impeller 19-2 is accommodated, and the centrifugal force causes the water to be pumped up and sucked from the suction port 14. The upstream water is drained to the downstream side by opening the backflow prevention valve 27 from the discharge port 25 via the suction flow path 29 and the discharge flow path 31, but in the present invention, the impeller 19- is used as a drainage pump. Since the screw-type centrifugal pump S having a large passage area in 2 is used, even if a large dust is sucked from the suction port 14 together with water, the dust passes between the impellers 19-2 and is subjected to centrifugal force. Since it is transported to the discharge channel 31 and drained as it is, it can be drained without clogging the pump with large dust. Therefore, it is not necessary to install a large dust removal equipment (such as an automatic dust remover) that has been required to be installed upstream of the screw type spiral pump gates 100-2a, b, and the dust removal equipment can be simplified or omitted. As a result, the construction cost and the operation cost can be reduced.
[0020]
As described above, when the screw-type spiral pump S is used as a pump incorporated in the pump gate, the non-occlusion is slightly inferior to the vortex pump, but the height of the head is higher than that of the non-clog pump N, and the efficiency is also improved. It is further improved than the non-clog pump N. Therefore, this screw type centrifugal pump is most suitable when high head and high efficiency are required.
[0021]
By the way, if dust removal equipment is simplified or omitted from the above, there is a high possibility that dust will be discharged by this non-clog pump gate 100 or screw type spiral pump gate 100-2a, b, and impellers 19, 19- There is a high possibility that dust will collide with 2. Therefore, as the material of the impellers 19 and 19-2, an elastic material such as a soft rubber or a synthetic resin is used in addition to the conventional castings and steel plates, and the dust is temporarily transferred to the impellers 19 and 19-2. You may make it relieve the impact and galling to the power transmission parts, such as a reduction gear, when clogged and the pump is restrained rapidly. In some cases, only the blade surfaces of the impellers 19 and 19-2 may be made of an elastic material.
[0022]
The submersible electric motor 23 is in contact with the water on the downstream side, so that it is cooled by this, and is also cooled by the drainage discharged from the discharge port 25, so that the cooling can be performed effectively.
[0023]
In the above embodiment, the pump gate is configured by connecting and fixing a plurality of (two) unit type non-clog pumps 10 and 10, so depending on the width of the pump gate and the amount of drainage required depending on the water channel. Not only can the unit type non-clog pumps 10 of the same standard be easily connected by connecting one or more units, but the unit type non-clog pumps 10 to be manufactured can be of one type or structure. Designing and manufacturing is easy because only a small amount of wastewater and different types of drainage heads need to be produced. The same applies to the unit type screw type centrifugal pumps 10-2a and 10b.
[0024]
However, the present invention is not limited to the unit type, and as shown in FIG. 8, the non-clog pump N is disposed at a desired position of one frame 35-3 constituting the non-clog pump gate 100-3. It may be attached. The same applies to the screw-type spiral pump gate.
[0025]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims. For example, the number of non-clog pumps or screw spiral pumps to be attached may be one or three or more. In addition to the electric motor, the driving means for driving the pump may be any other driving means such as a hydraulic motor. The speed reducer may be attached when necessary, and the transmission system may be any means such as a gear system, a belt system, or a chain system.
[0026]
【The invention's effect】
As described in detail above, the present invention has the following excellent effects. (1) Since a non-clog pump or a screw-type spiral pump is used as a pump for draining the pump gate, even large dust can be drained, dust removal equipment can be simplified or omitted, and the entire equipment can be downsized. However, maintenance is also easy, and construction costs and operating costs can be reduced. In particular, when a non-clog pump is used, it is effective in further reducing the size, weight and cost. In particular, when a screw-type centrifugal pump is used, higher head and higher efficiency can be realized.
[0027]
{Circle around (2)} When the material of the impeller is made of an elastic material, even when the pump is abruptly restrained by dust or the like, it is possible to alleviate the impact and galling on the power transmission unit such as a speed reducer.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a non-clog pump gate 100 according to a first embodiment of the present invention.
FIG. 2 is a perspective view of the non-clog pump gate 100 as viewed from the opposite side.
3A and 3B are diagrams showing a single unit type non-clog pump 10, in which FIG. 3A is a schematic side sectional view, and FIG. 3B is a schematic AA sectional view of FIG. .
4 is a perspective view showing a state in which the upstream surface of the frame body 35 of the unit type non-clog pump 10 is cut away. FIG.
FIGS. 5 (a) and 5 (b) are perspective views showing screw type spiral pump gates 100-2a and 100b according to the second embodiment of the present invention.
6A and 6B are diagrams showing one unit-type horizontal shaft screw type centrifugal pump 10-2a, FIG. 6A is a schematic side sectional view, and FIG. 6B is a state shown in FIG. 5A. It is a perspective view of the frame 35 of one unit type screw type centrifugal pump 10-2.
7A and 7B are diagrams showing a unit type vertical shaft screw type centrifugal pump 10-2b, FIG. 7A is a schematic sectional view, and FIG. 7B is a unit type vertical shaft screw type centrifugal pump 10-; FIG. 2B is a view from the front, and FIG. 7C is a view from the discharge side.
FIG. 8 is a perspective view showing a non-clog pump gate 100-3 according to another embodiment.
FIG. 9 is a side sectional view showing a vortex pump gate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water channel 100 Non-clog pump gate 10 Unit type non-clog pump N Non-clog pump 14 Suction port 15 Casing 19 Impeller 20 Rotating shaft 21 Orthogonal shaft speed reducer 23 Underwater electric motor (drive means)
25 Discharge port 27 Backflow prevention valve (Flap valve)
35 Frame 100-2a Horizontal-axis screw-type centrifugal pump gate 100-2b Vertical-axis screw-type centrifugal pump gate 10-2a Unit-type horizontal-axis screw-type centrifugal pump 10-2b Unit-type vertical-axis screw-type centrifugal pump S Screw type Centrifugal pump 19-2 Impeller 100-3 Non-clog pump gate 35-3 Frame

Claims (6)

In a pump gate configured to drain water on one side of a closed water channel by incorporating a drain pump into the gate itself for opening and closing the water channel and operating the pump with the gate closed by the gate ,
Using a non-clog pump or a screw-type centrifugal pump as the pump ,
In addition, the non-clog pump or the screw-type spiral pump is installed so that the rotating surface of the impeller is substantially parallel to the surface of the pump gate by being installed so that the rotating shaft of the impeller is a horizontal axis. A blockage-avoidance pump gate characterized by being attached to the gate. The non-clog pump or the screw-type spiral pump includes a casing that forms a pump flow path. 2. The blockage avoidance type pump gate according to claim 1, wherein the drive means is attached. In a pump gate configured to drain water on one side of a closed water channel by incorporating a drain pump into the gate itself for opening and closing the water channel and operating the pump with the gate closed by the gate ,
Using a non-clog pump or a screw-type centrifugal pump as the pump,
The non-clog pump or the screw-type spiral pump includes a casing that forms a pump flow path. The impeller is housed in the casing, and the impeller is driven to rotate outside the casing that houses the impeller. A blockage avoidance type pump gate characterized in that it is configured by attaching means. 4. The blockage avoidance type pump gate according to claim 2, wherein the drive means is configured to contact river water downstream of the blockage avoidance type pump gate. 5. 4. The blockage avoidance according to claim 2, wherein the driving means is installed at a position below the discharge port at the end of the pump flow path and where drainage discharged from the discharge port is applied. Type pump gate. The blockage avoidance type pump gate according to any one of claims 1 to 5, wherein a material of an impeller of the non-clog pump or the screw-type spiral pump is an elastic material.

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