JP4788959B2 - Pump device and cyclone type foreign matter removing device - Google Patents

Description

  The present invention relates to a foreign matter removing device that removes foreign matter mixed in a liquid pumped up by a pump, and a pump device including the foreign matter removing device.

Examples of the pump that pumps up liquids such as water, cleaning liquid, and grinding liquid include those integrated with an electric motor that drives the pump, such as the pump described in Patent Document 1 below, or separate from each other. There are various modes such as an electric motor and a pump connected by a coupling. In any type of pump, if foreign matter such as sludge, sand, stone, etc. is mixed in the liquid to be pumped, wear due to contact with foreign matter on the sliding part of the pump, or biting of foreign matter into the gap in the pump. Various problems occur, such as the pump locking due to intrusion. Therefore, for example, if a filter is provided at the suction port of the pump, foreign matter mixed in the liquid is filtered and entry into the pump is prevented.
JP 2000-303986 A

However, if the filter is too coarse, the foreign matter is not sufficiently filtered, and if it is too fine, the filter is clogged and the filter needs to be frequently replaced. For this reason, it is necessary to use an eye filter according to the particle size of the foreign matter mixed in the liquid. Intrusions are generated. Also, if the pump is installed in a liquid and is a submersible pump that pumps up the liquid, it is difficult to replace even if clogging occurs, so a filter cannot be provided, and foreign matter enters the pump. It is inevitable that problems such as a decrease in the pump life due to the above will occur.
The present invention has been made in the background of the above circumstances, and an object of the present invention is to provide an apparatus capable of removing foreign matters mixed in a liquid without using a filter.

The above problem is that a device connected to a pump for pumping liquid and removing foreign matter mixed in the liquid sucked into the pump has (a) a circular cross-sectional shape extending in the vertical direction, at least at the lower part. A main body part that is a conical part whose diameter gradually decreases toward the bottom, (b) a top plate that closes the upper end opening of the main body part, and (c) an outflow that extends vertically through the center part of the top plate. A plurality of inlets formed at a plurality of positions spaced apart from each other in the circumferential direction at the upper portion of the cylinder and (d) the body portion, through the circumferential wall of the upper portion and inclined with respect to the radial direction of the body portion (E) a foreign substance exclusion port formed at the lower end of the main body, (f) an open / close body that opens and closes the foreign substance exclusion port, and (g) a liquid that flows up and down in the outflow cylinder. A pull-up member that receives upward force from the liquid while allowing it to flow out through the cylinder; (h) the pull-up member A defining portion for defining a descending end of the member; and (i) connecting the pulling member and the opening / closing body, and determining a distance between the lifting member and the opening / closing body, the descending end of the lifting member being the defining portion The opening and closing body is spaced apart from the foreign object exclusion port in a state defined by the above, and a connection device that defines a distance at which the opening and closing body closes the foreign object removal port as the lifting member is lifted, closing the opening and closing member is said foreign object removing port by occasionally lifting force exerted on the lifting member from the liquid flowing through the outflow tube is transmitted via the connection device, the opening and closing when not in operation of the pump This is solved by a cyclone-type foreign substance removing device in which the body opens the foreign substance exclusion port.
The whole body part may be a conical part, the upper part may be a straight cylindrical part having a constant diameter, and at least a part of the part following the cylindrical part may be a conical part. When the main body portion includes a cylindrical portion and a conical portion, the inflow port is preferably formed in the cylindrical portion.
The cyclone type foreign matter removing apparatus according to the present invention can be connected to various types of pumps such as a centrifugal pump, an axial flow pump, and a reciprocating pump.

The cyclone type foreign matter removing apparatus according to the present invention is disposed in a liquid, and when the pump is operated, the liquid flows in from the outside of the main body through a plurality of inflow ports. Since it is formed to be inclined with respect to the direction, a vortex flow in a direction determined by the direction of the inclination is generated. Since the inflow port is provided in the upper part of the main body, the liquid flows downward while swirling between the peripheral wall of the main body and the outflow tube. The liquid is sucked upward by the suction action of the pump at the center of the main body, flows into the outflow cylinder, and is sucked into the pump. Foreign substances mixed in the liquid are separated by the centrifugal force of the vortex. Since at least the lower part of the main body part is a conical part with a gradually decreasing diameter as it goes downward, the flow rate of the vortex increases toward the lower part, the centrifugal force increases, and the foreign matter is separated well. It moves downward along the slope of the liquid and settles without being sucked into the pump. A foreign substance exclusion port is provided at the lower end of the main body, but when the pump is operated, the opening / closing body is opened by transmitting the rising force applied to the pull-up member from the liquid flowing out through the outflow cylinder through the connecting device. Since the foreign substance exclusion port is closed, the inflow of liquid from the foreign substance exclusion port is prevented, and the foreign substance settles well.
When the pump is stopped, no upward force can be applied to the pulling member, so that the opening / closing body opens the foreign matter exclusion port, is separated, and the deposited foreign matter is discarded outside the main body.
As described above, according to the cyclone type foreign matter removing apparatus according to the present invention, the liquid sucked up by the pump is swirled, and the foreign matter is separated by centrifugal force. Can be satisfactorily avoided. In addition, when the liquid to be pumped by the pump is water, it becomes easy to make drinking water by improving the foreign matter removal property at the time of pumping.
In addition, the lifting member and the connecting device are open / close body opening / closing devices that use the pumping of the liquid by the pump and automatically open / close the foreign object exclusion port in the open / close body in conjunction with the operation / stop of the pump. In addition, a simple and highly reliable opening / closing member opening / closing device can be obtained without the need for a hydraulic actuator or a control device therefor, which can be manufactured at low cost.
The inflow port is desirably formed at a position above the opening in the main body portion of the outflow tube, but is not essential, and the inflow port may be provided below the opening in the main body portion of the outflow tube. For example, between the inlet and the opening in the main body of the outflow cylinder, a member that allows the vortex generated in the main body due to the inflow of liquid from the inlet once downward and then allowed to flow into the outflow cylinder is provided, It is possible to separate the foreign matter by the centrifugal force of the eddy current and to precipitate it.

Aspects of the Invention

  In the following, the invention that is claimed to be claimable in the present application (hereinafter referred to as “claimable invention”. The claimable invention is at least the “present invention” to the invention described in the claims. Some aspects of the present invention, including subordinate concept inventions of the present invention, superordinate concepts of the present invention, or inventions of different concepts) will be illustrated and described. As with the claims, each aspect is divided into sections, each section is numbered, and is described in a form that cites the numbers of other sections as necessary. This is for the purpose of facilitating the understanding of the claimable invention, and is not intended to limit the combinations of the constituent elements constituting the claimable invention to those described in the following sections. In other words, the claimable invention should be construed in consideration of the description accompanying each section, the description of the embodiments, etc., and as long as the interpretation is followed, another aspect is added to the form of each section. In addition, an aspect in which constituent elements are deleted from the aspect of each item can be an aspect of the claimable invention.

  In each of the following terms, (1) corresponds to claim 1, (4) corresponds to claim 2, (7) corresponds to claim 3, (8) and (9), Are combined in claim 4, (12) and (13) are combined in claim 5, (14) is in claim 6, (18) is in claim 7, Each corresponds.

(1) A device that is connected to a pump that pumps liquid and removes foreign matters mixed in the liquid sucked into the pump,
A body portion having a circular cross-sectional shape and extending in the vertical direction, at least a conical portion whose diameter gradually decreases as the lower portion is directed downward;
A top plate that closes the upper end opening of the main body,
An outflow tube extending vertically through the center of the top plate,
A cyclone type including a plurality of inlets formed at a plurality of positions spaced apart from each other in the circumferential direction at the upper part of the main body part and penetrating the peripheral wall of the upper part and inclined with respect to the radial direction of the main body part Foreign matter removal device.
(2) The cyclone type foreign matter removing device according to (1), wherein the inflow port is formed in the peripheral wall of the main body portion so as to penetrate the peripheral wall in the thickness direction.
For example, when the peripheral wall is thin, the inflow port can be formed by bending a part of the peripheral wall or attaching a separate liquid introduction member. However, the inflow port described in this section has the thickness of the peripheral wall. Therefore, it is easy to form, and there is no fear of disturbing the swirling of the liquid in the main body, and a good vortex can be generated in the main body.
(3) The cyclone type foreign matter removing device according to (1) or (2), wherein three or more inflow ports are formed at equiangular intervals.
If three or more inlets are evenly arranged in the circumferential direction on the peripheral wall of the main body, there is a radial clearance between the portion of the main body provided with the inlet and the member surrounding the main body. Even if it is small, the liquid can flow well into the main body through the inlet. For example, it may be difficult to increase the cross-sectional area as in a deep well, and it may be unavoidable that the gap between the main body and the inner peripheral surface of the deep well becomes narrow. If it is provided at a position that is biased in the circumferential direction, the liquid in the deep well concentrates in one place in the circumferential direction of the main body, and the pressure around the deep well side opening of the inlet increases and flows into the main body. It is hard to do. On the other hand, if three or more inflow ports are formed at equiangular intervals, the liquid is dispersed in the circumferential direction of the main body portion and flows into the main body portion from the inflow port. The pressure does not increase and can flow in easily. The cyclone type foreign matter removing apparatus of this section is suitable for removing foreign matters when pumping liquid from a liquid pumping target portion having a small diameter, such as a deep well or a pipe.
(4) a foreign matter exclusion port formed at the lower end of the main body,
The cyclone type foreign matter removing device according to any one of (1) to (3), comprising an opening / closing body that opens and closes the foreign matter exclusion port.
If a foreign substance exclusion port is provided at the lower end of the main body, foreign substances can be easily eliminated from this, but this foreign substance exclusion port prevents the inflow of liquid from the foreign substance exclusion port when pumping up the liquid. It needs to be closed to prevent it.
The opening / closing of the foreign substance exclusion port by the opening / closing body may be performed manually by an operator, or may be automatically performed by the opening / closing body opening / closing device. In the former case, the operator removes the foreign matter by opening the foreign matter removal port by removing the opening / closing body from the foreign matter removal port or rotating it. Since the foreign substance exclusion port is provided at the lower end of the main body part, the foreign substance deposited below the main body part can be easily removed. The opening / closing body opening / closing device that automatically opens and closes the opening / closing body is suitable for places where it is difficult to manually open and close the opening / closing body, for example, when a cyclone type foreign material removal device is provided in a deep well. By placing the pump in the open position when the pump is stopped and in the closed position when the pump is operating, foreign matter can be automatically removed from the main body every time the pump is stopped. In this case, the main body portion may have a foreign object storage space that can store a foreign object separated during one pump operation, and can be made small. The automatic opening / closing body opening / closing device can be considered as a foreign matter automatic discharge device that automatically discharges the foreign matter separated in the main body. If manual operation by an operator is possible, a manually operated opening / closing body opening / closing device may be provided.
(5) The main body part includes a straight cylinder-like accumulation cylinder that extends coaxially from the lower end of the cone part below the cone part and accumulates and stores the foreign matter collected by the cone part. The cyclone type foreign matter removing apparatus according to item (4), wherein the foreign matter exclusion port is formed at the lower end of the cyclone type.
In the cyclone type foreign matter removing apparatus of this section, it is assumed that the lower part of the main body part is a conical part and the lower end part of the main body part is a deposition cylinder.
(6) An opening penetrating in the vertical direction is provided in the vicinity of the boundary between the accumulation cylinder and the conical section, and allows the foreign matter collected by the conical section to settle into the accumulation cylinder, while the liquid in the conical section The cyclone type foreign matter removing device according to item (5), wherein a swirl suppressing member is provided that suppresses swirling from being transmitted to the liquid in the accumulation cylinder.
The liquid in the accumulation cylinder is agitated, and the foreign matter once settled is wound up, moves backward to the conical portion side, and is well avoided.
(7) a lifting member provided in the vicinity of the outflow cylinder so as to be movable up and down, and receiving a rising force from the liquid while allowing the liquid to flow out through the outflow cylinder;
A defining portion for defining a descending end of the lifting member;
The pull-up member and the open / close body are connected to each other, and the distance between the pull-up member and the open / close body is set so that the open / close body is separated from the foreign object exclusion port in a state where the lower end of the pull-up member is defined by the defining portion. A cyclone-type foreign matter removal device according to any one of (4) to (6), including a connecting device that is spaced downward and defines a distance at which the opening / closing body closes the foreign matter removal port as the lifting member rises apparatus.
The defining portion may abut the lifting member to define the lowering end, or indirectly define the lowering end by contacting a member that moves integrally with the lifting member, for example, an opening / closing body or a connecting device. It may be a thing.
When the pump is inactive, no lifting force is applied to the pulling member, and it is located at the lower end position, and the opening / closing body opens the foreign object exclusion port. However, if the pump is operated, the lifting force is applied to the pulling member. The opening / closing body closes the foreign substance exclusion port, and the liquid is introduced from the inflow port of the main body to generate a vortex. The liquid that has flowed into the main body is sucked into the pump through the outflow tube. Therefore, the ascending force surely acts on the lifting member provided in the vicinity of the outflow cylinder and is pulled up. The lifting member is preferably provided in the outflow tube, but may be located outside the outflow tube as long as it is lifted by the force of the liquid flowing out through the outflow tube. When the pump is stopped, the lifting member and the opening / closing body are lowered by its own weight, the opening / closing body opens the foreign substance exclusion port, is separated, and the deposited foreign substance is discarded outside the main body. In addition, in order to ensure the lowering of the pull-up member and the opening / closing body, it is also possible to apply the urging force of an elastic member such as a spring downward.
The lifting member and the connecting device are open / close body opening / closing devices that use the pumping of the liquid by the pump and automatically open and close the foreign substance exclusion port in conjunction with the operation and stop of the pump. A pressure actuator and its control device are not required, and it can be manufactured at a low cost, and a simple and reliable opening / closing member opening / closing device can be obtained.
(8) The cyclone type foreign matter removing device according to (7), wherein the lifting member is provided so as to be movable up and down inside the outflow cylinder.
(9) The cyclone as set forth in (8), wherein the lifting member is a blade member provided with blades oriented to cause the liquid flowing in the outflow tube to swirl in the direction opposite to the swirling direction of the liquid in the main body. Mold foreign matter removal device.
The liquid that has flowed into the outflow cylinder hits the blades and is prevented from turning. For this reason, there is little or no swirling of the liquid when sucked into the pump from the outflow tube, and the reduction in efficiency of the pump due to the presence of swirling can be reduced or eliminated.
It is desirable that the blade just stops the swirling of the liquid flowing into the outflow cylinder from the main body.
Further, it is desirable that the number of blades is two or three or more.
If the lifting member is a blade member, the number of parts can be reduced. However, the same member is not essential, and the blade member may be provided separately from the lifting member. In that case, the blade member may be provided with its position fixed inside the outflow tube. Further, the pull-up member may be a member that receives a rising force from the liquid while allowing the liquid to flow out through the outflow cylinder, and is provided outside the outflow cylinder even if provided in the outflow cylinder. For example, it has a lattice shape and is arranged so as to be able to move up and down in a posture perpendicular to the axis of the outflow cylinder. On the downward surface of the portion forming the lattice, positive pressure (strictly speaking, liquid passing between the lattices) At least one of receiving a negative pressure (strictly, a pressure lower than the pressure of the liquid passing between the lattices) on the upward surface.
(10) The opening / closing body is a cone having a convex cone surface having a smaller cross-sectional area toward the top, and the upper end of the cone is connected to the lower end of the connection device. A cyclone-type foreign matter removing device according to claim 1.
(11) The cyclone type foreign matter removing apparatus according to (10), wherein a concave cone surface corresponding to the convex cone surface of the cone is formed at a lower end portion of the accumulation cylinder.
When the lifting member is raised, the convex cone surface fits into the concave cone surface, and the foreign object exclusion port is securely closed by the guide action and wedge action of each inclined surface, and the foreign substance exclusion port is inserted into the main body part during pump operation. It is avoided that liquid flows into the water.
(12) The cyclone type foreign matter removing device according to any one of (7) to (11), wherein the connecting device includes a connecting member that fixedly connects the lifting member and the opening / closing body.
(13) The connection member is a connection shaft that is substantially rigid, and the connection shaft is fitted to a bearing member provided on at least one of the outflow tube and the main body portion so as to be slidable in the axial direction. The cyclone type foreign matter removing device according to item (12), wherein the bearing member includes an opening penetrating in the vertical direction.
According to the connecting shaft, the lifting member and the opening / closing body can be easily connected. The connecting shaft is supported by being fitted to the bearing member, moves stably in the axial direction, and reliably closes the foreign substance exclusion port without tilting the opening / closing body.
(14) The cyclone foreign object according to (13), wherein the bearing member includes a first bearing member provided in the outflow tube and a second bearing member provided in an intermediate portion in the axial direction of the main body. Removal device.
The connecting shaft is supported by the bearing member at two locations separated in the axial direction, and is moved more stably in the axial direction, and the pulling member is moved in the vertical direction.
(15) The cyclone type foreign matter removing device according to (14), wherein the first bearing member is in contact with the lifting member and constitutes the defining portion that defines a descending end of the lifting member.
Since the first bearing member also serves as the defining portion, the number of parts can be reduced, and the cyclone type foreign matter removing device can be simply configured.
(16) The main body includes a straight cylindrical stacking cylinder that extends coaxially from a lower end of the conical section below the conical section and stores foreign substances collected by the conical section and stores the accumulated foreign bodies. The foreign matter removal port is formed at the lower end of the first member, and the second bearing member is provided in the vicinity of the boundary between the accumulation cylinder and the conical portion, and the foreign matter collected by the conical portion in an opening penetrating in the vertical direction (14) or (15), which constitutes a swirl suppression member that allows the liquid to settle in the accumulation cylinder while suppressing the swirling of the liquid in the conical portion from being transmitted to the liquid in the accumulation cylinder. Cyclone type foreign matter removal device.
Since the second bearing member also serves as a turning restraining member, the number of parts can be reduced, and the cyclone type foreign matter removing device can be simply configured.
(17) A relative rotation prevention device is provided between the first bearing member and the connection shaft, the relative rotation preventing device preventing the relative rotation between the first bearing member and the connection shaft while allowing the relative movement between the first bearing member and the connection shaft. ) The cyclone type foreign matter removing device according to any one of the items
It is also possible to provide a relative rotation preventing device between the second bearing member and the connecting shaft. However, in that case, if rotational torque acts on the lifting member, the connecting shaft is elastically twisted, and rotational vibration may occur in the lifting member. Therefore, it is desirable to provide the relative rotation preventing device as close to the pull-up member as possible. In particular, when the lifting member is a blade member, the swirling of the liquid flowing in the outflow cylinder can be stably suppressed.
(18) a submerged pump installed in the liquid to pump up the liquid;
A cyclone type foreign matter removing device according to any one of (1) to (17) connected to a suction port of the submerged pump.
The effect described in any one of the items (1) to (17) is obtained in the cyclone type foreign matter removing device for the pump device described in this item.
As described above, it is difficult to filter a foreign substance by providing a filter for a submerged pump. However, a cyclone type foreign substance removing device can remove a foreign substance without using a filter, and a pump device that is easy to maintain. can get.
In a motor / pump-integrated pump device in which a pump is disposed at the center of the motor, the pump rotation speed is generally high. Therefore, the pump is disposed in the liquid and the bearing of the rotating shaft is lubricated by the pumped liquid. However, in this case, foreign matter removal by a cyclone-type foreign matter removing device is particularly effective because foreign matter intrusion into the bearing surface is likely to cause failure and life reduction.
(19) The pump device according to item (18), wherein the submerged pump has a generally cylindrical shape, has the suction port at the lower end and the discharge port at the upper end, and is connected coaxially with the cyclone type foreign matter removing device. .
The pump device described in this section has a small cross-sectional area, such as a deep well or a thin long pipe, and is coaxially installed in a long liquid pumping target portion, and can pump up the liquid while removing foreign matters. It is suitable for separation of foreign matters such as sand when pumping liquid from a well and pipe sludge when pumping liquid from a pipe.

  Hereinafter, embodiments of the claimable invention will be described in detail with reference to the drawings. In addition to the following examples, the claimable invention can be practiced in various modifications based on the knowledge of those skilled in the art, including the aspects described in the above [Aspect of the Invention] section. .

  FIG. 1 shows a pump device as an embodiment of the claimable invention. The pump device pumps water from the deep well 10. The submersible pump 14 is a submerged pump that is installed in water and pumps water, and a cyclone-type foreign matter removing device 16 connected to a suction port of the submersible pump 14. Including. The submersible pump 14 is an integrated pump in which a pump is disposed at the center of an electric motor serving as a drive source, and the electric motor and the pump are integrated. This type of integrated pump is described in, for example, Japanese Patent Application Laid-Open No. 2000-303986, and will be briefly described.

  As shown in FIG. 2, the submersible pump 14 includes an electric motor 24 including a stator 20 and a rotor 22, a hollow cylindrical pump case 26 that is a pump body, a rotary blade 30, a guide blade 32, and a return passage 34. Is integrated with the multistage centrifugal pump 36, and generally has a cylindrical shape. The stator 20 is formed by winding a coil 42 around a stator core 40 and is hermetically sealed in a sealed container 44 provided integrally with the pump case 26. The rotor 22 is formed by fixing a plurality of permanent magnets 52 at equiangular intervals on an outer peripheral surface of a yoke 50 as a rotor body that is a hollow cylinder made of a magnetic material, and is disposed concentrically in the pump case 26. Both ends are rotatably supported by radial thrust bearings 54, respectively. Each of these radial thrust bearings 54 includes a bearing metal 56 fixed to the yoke 50 and a bearing metal 58 fixed to the pump case 26, is a slide bearing, does not include a shaft seal device, and is pumped by the submersible pump 14. The water thus formed forms a water curtain between the sliding surfaces of the bearing metals 56 and 58 and functions as a lubricant.

  The rotary blade 30 is fixed to the inner peripheral surface of the yoke 50 of the rotor 22, and the guide blade 32 is fixed to the outer peripheral surface of the fixed shaft 60 supported concentrically by the pump case 26. The fixed shaft 60 is fixed to the suction pipe 62 and the discharge pipe 64 fixed to both ends of the pump case 26, and a plurality of blades 30 and 32 are alternately arranged in the axial direction of the fixed shaft 60. A return passage 34 is formed on the inner peripheral side. When a current is supplied to the coil 42, the rotor 22 is rotated by the interaction between the magnetic field formed in the stator 20 and the magnetic field of the permanent magnet 52 of the rotor 22, and the suction pipe 62 is opened at the front end. Water is sucked into the pump case 26 through a plurality of openings 68 provided at the proximal end of the suction port 66 and the suction pipe 62. This water flows into the inner peripheral side of the rotary blade 30 and is discharged from the outer peripheral side, flows into the outer peripheral portion of the guide blade 32, and increases in pressure while being guided to the inner peripheral side by the return passage 34, and again. By flowing into the inner peripheral portion of the rotary blade 30 and repeating the operation, water is discharged at a high pressure from the inner peripheral portion of the guide blade 32 at the final stage, and a plurality of openings 70 provided at the proximal end portion of the discharge pipe 64 are provided. And discharged from a discharge port 72 which is a front end opening of the discharge pipe 64. Each of the suction pipe 62 and the discharge pipe 64 is provided with a radially outward flange 74 and flange 76 at the tip opening, and the water discharged from the discharge pipe 64 is detachably fixed to the flange 76. 78 (see FIG. 1) and sent. The submersible pump 14 is disposed in the water of the deep well 10 in a posture in which the rotation axis is parallel to the vertical direction, the suction port 66 is positioned at the lower end, and the discharge port 72 is positioned at the upper end.

The cyclone type foreign matter removing device 16 will be described.
As shown in FIG. 3, the main body 90 of the cyclone-type foreign matter removing device 16 has a cylindrical shape with a circular cross section, extends in the vertical direction, and includes a cylindrical portion 92, a conical portion 94, and a deposition cylinder 96. . The cylindrical portion 92 is provided at the upper portion of the main body portion 90, and is a straight tube having a constant diameter. The conical portion 94 is provided below the cylindrical portion 92, and the diameter is linear as it goes downward from the lower end of the cylindrical portion 92. It has a shape that is gradually reduced. The accumulation cylinder 96 is a straight cylinder that is provided below the conical portion 94 so as to extend coaxially from the lower end of the conical portion 94 and has a constant diameter.

  The upper end opening of the main body 90 is closed by the top plate 100, and the outflow tube 102 extends in the vertical direction through the central portion of the top plate 100. The outflow tube 102 has a bottomed cylindrical shape, and its bottom portion 104 is disposed in the main body 90. As shown in FIGS. 3 and 6, a plurality of openings 106 penetrates in the vertical direction, and an appropriate interval is provided. In this apparatus, the apparatus is provided at equiangular intervals, and allows the inflow of water from the main body 90 into the outflow tube 102. A radially outward flange 110 is formed at the periphery of the opening at the upper end of the outflow tube 102 that protrudes upward from the main body 90, and a bolt or the like is appropriately attached to the flange 74 of the suction pipe 62 of the submersible pump 14. The coupling means 112 is detachably coupled. Thereby, the cyclone type foreign matter removing device 16 is coaxially connected to the suction port 66 of the submersible pump 14, and the outflow cylinder 102 is communicated with the suction pipe 62. The flange 110 of the outflow cylinder 102 constitutes a connecting portion for connecting the cyclone type foreign matter removing device 16 to the submersible pump 14, and this pump device is coaxially disposed in the deep well 10.

  As shown in FIGS. 3 and 4, the peripheral wall 118 of the main body 90 has a plurality of upper end portions adjacent to the top plate 100 of the cylindrical portion 92 in the cyclone-type foreign matter removing device 16. The four inflow ports 120 are formed at equiangular intervals. As shown in FIG. 4, each of these inlets 120 is a spiral that penetrates the peripheral wall 118 in the thickness direction, that is, from the outer peripheral surface to the inner peripheral surface, and is axisymmetric with respect to the axis of the cylindrical portion 92. In the AA cross-sectional view in FIG. 3, it is formed along a spiral that turns counterclockwise from the outer peripheral surface of the peripheral wall 118 toward the inner peripheral surface. Each of the four inlets 120 is formed in the peripheral wall 118 and is inclined with respect to the radial direction of the main body 90. As shown in FIG. 3, the four inflow ports 120 are long in the direction parallel to the axis of the main body 90, but are formed at positions above the bottom 104 of the outflow tube 102.

  As shown in FIG. 3, a foreign substance removal port 130 is formed at the lower end of the accumulation cylinder 96 of the main body 90. The foreign substance exclusion port 130 is opened and closed by a cone 132 that is an open / close body. The cone 132 has a circular cross-sectional shape, and the outer peripheral surface thereof is a convex cone surface 134 having a smaller cross-sectional area toward the top, and a concave cone surface 136 corresponding to the convex cone surface 134 at the lower end portion of the stacking cylinder 96. Is formed. The foreign object exclusion port 130 is defined by the concave cone surface 136, and the foreign object exclusion port 130 is closed by fitting the cone 132 to the foreign material exclusion port 130. The cone 132 is formed with a bottomed hole 139 that opens to the bottom or bottom surface of the cone 132 to reduce weight.

  The cone 132 is connected to the blade member 140 by a connecting shaft 138. As shown in FIGS. 3 and 5, the blade member 140 includes a plurality of, for example, two blades 142, and is provided so as to be movable up and down inside the outflow tube 102. The blades 142 are provided at positions separated from each other in the diameter direction of the blade member 140, and are twisted so that the upper end and the lower end are at right angles, and are inclined with respect to the axis of the outflow tube 102. Is allowed to pass from below to the top, that is, the passage of water flowing from the cyclone type foreign matter removing device 16 to the submersible pump 14 side, and at that time, the difference in pressure acting on both surfaces (the downward surface and the upward surface) of the blade 142 Receive ascending force from the water. The blade member 140 is also a lifting member. Further, the direction of twisting of the two blades 142 is such that the water flowing upward from below in the outflow tube 102 causes a counterclockwise turn in a plan view, as indicated by an arrow in FIG.

  The connecting shaft 138 that connects the blade member 140 and the cone 132 is substantially a rigid body. In the foreign matter removing apparatus 16, for example, the connecting shaft 138 is made of a rust-resistant metal such as stainless steel or copper. The connecting shaft 138 is fitted in a first bearing member 150 provided in the outflow cylinder 102 and a second bearing member 152 provided in a boundary portion between the conical portion 94 and the accumulation cylinder 96 so as to be slidable in the axial direction. The lower end of the blade member 140 is fitted and fixed to the upper end portion of the connection shaft 138, and the upper end of the cone 132 is fitted and fixed to the lower end portion. A sliding bearing bush 154 is fitted to the center of the bottom 104 of the outflow tube 102 to form the first bearing member 150 together with the bottom 104, and a plurality of openings 106 have openings through which the first bearing member 150 penetrates in the vertical direction. Constitute. The bush 154 is made of a material that does not easily rust, for example, stainless steel, copper, or synthetic resin, and the connection shaft 138 is fitted so as to be slidable in the axial direction.

  The descending end of the blade member 140 is defined by contacting the first bearing member 150. The first bearing member 150 constitutes a defining portion, and the connection shaft 138 determines the distance between the blade member 140 and the cone 132 in a state where the blade member 140 is in contact with the first bearing member 150 and is positioned at the lower end position. The cone 132 is spaced downward from the foreign object exclusion port 130 and is located at an open position where the foreign object exclusion port 130 is opened. As the blade member 140 is raised, the convex cone surface 134 is fitted to the concave cone surface 136, and the cone It is assumed that the body 132 has a length that is defined as a distance at which the foreign substance exclusion port 130 is closed.

  In addition, as shown in FIG. 6, a relative rotation preventing device 160 is provided between the first bearing member 150 and the connecting shaft 138 to prevent relative rotation between the first bearing member 150 and the connecting shaft 138 while allowing relative movement between the two. Yes. The relative rotation preventing device 160 is provided on the connecting shaft 138 and is fitted in a groove 162 as an engaging portion extending in the axial direction and a bush 154 for a sliding bearing in the radial direction, and one end thereof is directed to the connecting shaft 138 side. And a key 164 constituting an engaging portion that is protruded and fitted in the groove 162 so as to be relatively movable in the axial direction.

  As shown in FIG. 3, the main body 170 of the second bearing member 152 has a thick plate shape with a circular cross section, and is fitted and fixed to a boundary portion between the conical portion 94 and the stacking cylinder 96. . A slide bearing bush 172 is fitted in the center of the main body 170, and the connection shaft 138 is fitted so as to be slidable in the axial direction, and a plurality of openings 174 penetrating the main body 170 in the vertical direction are provided. It is formed at equiangular intervals around the 170 axis. Each of the openings 174 has, for example, a sector shape in cross section, and allows the foreign matter collected by the conical portion 94 to settle into the accumulation cylinder 96. The bush 172 is also made of a material that does not easily rust, like the plain bearing bush 154.

  As shown in FIG. 3, the wall on the outer peripheral side that defines the opening 174 of the main body 170 has a very thin thickness (dimension in the radial direction of the main body 170) at the upper end and is thicker toward the lower side, and the inner peripheral surface is closer to the lower side. The inclined surface is oriented to approach the axis of the second bearing member 152. Further, the fitting portion into which the bush 172 and the central bush 172 of the main body 170 are fitted is made as thin as possible at the upper end and thicker as it goes downward, and away from the axis of the second bearing member 152 as it goes downward on the outer surface. An inclined surface is provided. Further, the partition part that partitions the opening 174 of the main body 170 has a substantially triangular cross-sectional shape perpendicular to the radial direction of the main body 170, and the two side surfaces that define the opening 174 are separated from each other toward the lower side. The inclined surface is oriented.

  In the pump device configured as described above, when not operating, as shown by a two-dot chain line in FIG. 3, the blade member 140 is located at the lower end position, the cone 132 is located at the open position, and the foreign object exclusion port 130 is in an open state. If the multistage centrifugal pump 36 is operated by the electric motor 24 to draw water from the deep well 10, a flow of water from the lower side to the upper side is generated in the main body 90, and the outflow cylinder passes from the main body 90 through the opening 106. The air flows into 102 and is sucked into the multistage centrifugal pump 36 from the suction port 66. At this time, the two blades 142 receive the force of water flowing upward from below, but since the rotation of the blade member 140 is prevented by the relative rotation preventing device 160, the blade member 140 is simply pulled upward. It becomes. As a result, the cone 132 connected by the connecting shaft 138 is also moved upward, the convex cone surface 134 is fitted to the concave cone surface 136, and foreign matter is excluded by the guide action and wedge action due to the inclination of the faces 134 and 136. The mouth 130 is securely closed. This position is the closed position of the cone 132.

  As a result, the water in the deep well 10 flows into the main body 90 from the four inlets 120 provided in the main body 90. Since these inflow ports 120 are formed along the spiral, the water flowing into the main body 90 through the inflow port 120 as shown by arrows in FIGS. 3 and 4 is shown by arrows in FIG. As shown in the figure, the foreign substance removing device 16 swirls counterclockwise (clockwise in plan view) when viewed from the bottom (AA cross-sectional view in FIG. 3) in the direction determined by the direction of the vortex, and vortex is generated. The inflow port 120 is entirely provided above the bottom portion 104 of the outflow cylinder 102 and is located above the opening 106 provided in the bottom portion 104, so that the vortex flows downward as shown by a solid line in FIG. In addition, although the inflow port 120 is provided in the straight cylindrical portion 92, a conical portion 94 is provided below the inflow port 120, and the diameter of the main body portion 90 becomes smaller as it goes downward. , Underwater foreign matter such as sand 180 is separated by centrifugal force, guided and dropped by the inclined inner peripheral surface of the conical portion 94, and passes through the opening 174 of the second bearing member 152 into the accumulation cylinder 96. Settling and depositing.

  Each surface such as the side surface of the opening 174 of the second bearing member 152 is an inclined surface, and the thickness of the upper end of each of the outer peripheral portion, the central shaft fitting portion, and the partition portion of the opening 174 is extremely thin. Therefore, the sand 180 that sinks in the vicinity thereof does not remain on the second bearing member 180 but is guided by the inclined surface and falls into the accumulation cylinder 96. The swirling of the water in the conical portion 94 is suppressed by the second bearing member 152 from being transmitted to the water in the accumulation cylinder 96, and the foreign matter that has settled in the accumulation cylinder 96 is agitated and wound up again. Backward movement toward the portion 94 is avoided. In the cyclone type foreign matter removing apparatus 16, the second bearing member 152 also serves as a turning suppression member.

  The water in the main body 90 flows into the outflow cylinder 102 due to the suction action of the multistage centrifugal pump 36, but flows into the outflow cylinder 102 through the opening 106 in a state in which it swirls in the same direction as the downward swiveling. To do. The blades 142 are twisted in such a direction that the water flowing from the bottom to the top in the outflow cylinder 102 is swung counterclockwise in a plan view, and the swirling direction is the swirl direction of the vortex generated by the inclination of the inlet 120. The opposite is true. Therefore, the water flowing into the outflow cylinder 102 while turning is just stopped by the action of the blades 142, and the water is sucked into the multistage centrifugal pump 36 in a state of flowing substantially in the vertical direction. The blade 142 has a size and a twist angle set to a size that just stops the swirling of the water flowing into the outflow cylinder 102.

  If the submersible pump 14 is stopped, the flow of water disappears, the ascending force does not act on the blade 142, the blade member 140 and the cone 132 move downward due to their own weight, and the blade member 140 is moved to the first bearing member 150. The cone 132 is located at the open position and the foreign object exclusion port 130 is opened. Thereby, the accumulation cylinder 96 is opened, and the accumulated foreign matters such as the sand 180 are discarded in the water. The space in the accumulation cylinder 96 is a foreign matter storage space. In the cyclone type foreign matter removing device 16, the blade member 140 and the connecting shaft 138 automatically move the cone 132 in conjunction with the operation and stop of the submersible pump 14. The opening / closing body opening / closing device is configured to move to the open position and the closed position to open / close the foreign object exclusion port 130.

  In this way, in the present pump device, when water is pumped up by the submersible pump 14, the water is swirled, and the foreign matter is separated and removed by centrifugal force, so that it enters the multistage centrifugal pump 36 without using a filter. Foreign matter to be reduced is reduced, and the life reduction of the submersible pump 14 and the occurrence of pump lock are favorably avoided. In particular, since the radial thrust bearing 54 that supports the rotor 22 in the electric motor 24 is lubricated by the water curtain formed between the sliding surfaces of the bearing metals 56 and 58, a foreign matter removing effect can be effectively obtained.

  The foreign matter separation effect by swirling the water and generating the vortex is confirmed by experiments. This experiment is performed, for example, using an experimental apparatus schematically shown in FIG. In this experimental apparatus, a cylinder 202 having a circular cross section is arranged in the water tank 200 in the vertical direction, and a cyclone generating cylinder 204 is arranged in the cylinder 202. The cylinder 202 does not have a bottom. The cyclone generating cylinder 204 includes a cylindrical portion 206 and a conical portion 208 similar to the cylindrical portion 92 and the conical portion 94 of the main body 90 of the cyclone type foreign matter removing apparatus 16, and the cylindrical portion 206 has a plurality of flow paths along the spiral. An inlet 210 is formed, and the opening of the cone portion 208 is closed by a bottomed foreign matter receiving tube 212. Further, the upper end opening of the cylindrical portion 206 is closed by a top plate. In the pump 216, the tip end of the suction pipe 218 is disposed in the cylindrical part 206, and the tip end of the discharge pipe 220 is placed in a sand filter cloth 222 disposed in the water tank 200.

  During the experiment, sand is poured into the cylinder 202. This sand is beach sand having different particle sizes, and sand of the same weight is prepared for each type. Then, the pump 216 is operated to pump up the water in the cylinder 202 and discharge it into the sand filter cloth 222. The water in the cylinder 202 flows into the cyclone generating cylinder 204 from the inlet 210 to generate a vortex, and the sand mixed in the water is separated by centrifugal force. Then, it is pumped up together and filtered by sand filter cloth 222. Therefore, the flow rate of the water pumped up by the pump 216 is changed to a plurality of types, the water mixed with the sand is pumped up for each flow rate, and the particle size of the sand collected by the sand filter cloth 222 is measured to be in a plurality of ranges. Divide and weigh the sand belonging to each range. The flow rate is set based on the vacuum at the suction port 226 of the pump 216 detected by the vacuum gauge 224 and the pressure at the discharge port 230 detected by the pressure gauge 228. From this measurement result, the larger the flow rate, the larger the amount of sand collected on the sand filter cloth 222, that is, the sand that is not separated in the cyclone generating cylinder 204 and sucked by the pump 216, but the particle size is the same. It was confirmed that only a small particle size of sand was obtained, and the same foreign matter removing effect was obtained regardless of the flow rate.

  It has been confirmed by experiments that even if the foreign matter is removed by the cyclone type foreign matter removing device, the head loss is small. This experiment is performed using, for example, an experimental apparatus schematically shown in FIG. 8. As shown in FIG. 8A, the suction pipe 254 is connected from the water tank 250 by the pump 252 without providing a cyclone generating cylinder. Then, water is pumped up and discharged from the discharge pipe 256 to the flow meter 258, and the vacuum at the suction port 260 is detected by the vacuum gauge 262. Reference numeral 264 denotes a pressure gauge that detects the pressure of the discharge port 266.

  Further, as shown in FIG. 8 (b), the cylinder 270 is arranged in the vertical direction in the water tank 250, and the cylindrical portion 274 and the conical portion 276 (the lower end is the same as the inlet 120) are formed. Closed) in the cylinder 270, the tip of the suction pipe 280 of the pump 252 is placed in the cyclone generation cylinder 278, and water is pumped up through the cyclone generation cylinder 278 to suck in The vacuum at the mouth 260 is detected by the vacuum gauge 262. The tube 270 does not have a bottom. Whether or not the cyclone generating cylinder 278 is provided, the distance between the center of the pump 252 and the water surface of the water tank 250 is the same, and the lengths of the suction pipes 254 and 280 are also the same. The upper end opening of the cylindrical portion 274 is closed by a top plate.

  The difference between the vacuum at the suction port 260 when the cyclone generating cylinder 278 is not provided and the vacuum at the suction port 260 when the cyclone generating cylinder 278 is provided is a loss head, and the flow rate of the water pumped up by the pump 252 is divided into a plurality of types. When the head loss is detected for each flow rate, the head loss increases as the flow rate increases. However, the loss head size is practically unaffected and has little effect on the pumping performance of the pump 252. Was confirmed.

  In addition, the pump from which the foreign matter in the liquid is removed by the cyclone type foreign matter removing device according to the present invention is not limited to the submersible pump, and may be a pump that pumps the liquid outside the liquid. Further, the pump is not limited to an integrated pump, and may be a pump provided separately from the motor. Further, the pump is not limited to a deep well pump, and may be a line pump provided in a line-shaped pipe such as an electric well pump or a pipeline. .

It is a front view (partial cross section) which shows the state by which the pump apparatus which is one embodiment of the claimable invention is arrange | positioned in a deep well. It is a front view (partial cross section) which shows the submersible pump of the pump apparatus shown in FIG. It is front sectional drawing which shows the cyclone type foreign material removal apparatus of the pump apparatus shown in FIG. It is AA sectional drawing of the cyclone type foreign material removal apparatus shown in FIG. 3, and is bottom sectional drawing in the part in which the inflow port of the main-body part was formed. It is a top view which shows the blade | wing member of the said cyclone type foreign material removal apparatus. It is a top sectional view showing a relative rotation preventing device of the cyclone type foreign matter removing device. It is a front view which shows roughly the experimental apparatus for confirming the foreign material removal effect by a cyclone type foreign material removal apparatus. FIG. 8 (a) is an experimental device for measuring the loss head at the time of foreign matter removal by the cyclone type foreign matter removing device, FIG. 8 (a) is an experimental device without a cyclone generating cylinder, and FIG. It is a front view which shows each experimental apparatus schematically.

Explanation of symbols

  14: Submersible pump 16: Cyclone-type foreign matter removing device 24: Electric motor 90: Main body portion 92: Cylindrical portion 94: Conical portion 96: Deposition tube 102: Outflow tube 120: Inlet port 130: Foreign material removal port 132: Cone 138: Connection shaft 140: blade member

Claims (5)

A device that is connected to a pump that pumps liquid and removes foreign matters mixed in the liquid sucked into the pump,
A body portion having a circular cross-sectional shape and extending in the vertical direction, at least a conical portion whose diameter gradually decreases as the lower portion is directed downward;
A top plate that closes the upper end opening of the main body,
An outflow tube extending vertically through the center of the top plate,
A plurality of inlets formed in the upper part of the main body part at a plurality of positions spaced apart from each other in the circumferential direction, penetrating the peripheral wall of the upper part and inclined with respect to the radial direction of the main body part;
A foreign substance exclusion port formed at the lower end of the main body,
An open / close body that opens and closes the foreign object exclusion port;
A lifting member provided in the outflow cylinder so as to be movable up and down, and receiving a rising force from the liquid while allowing the liquid to flow out through the outflow cylinder;
A defining portion for defining a descending end of the lifting member;
The pull-up member and the open / close body are connected to each other, and the distance between the pull-up member and the open / close body is set so that the open / close body is separated from the foreign object exclusion port in a state where the lower end of the pull-up member is defined by the defining portion. And a connecting device that defines a distance at which the opening / closing body closes the foreign substance removal port as the pulling member rises, and when the pump is operated, the pulling member from the liquid flowing out through the outflow cylinder cyclone said opening and closing member closes the foreign object removing port, at the time of non-operation of said pump, wherein said opening and closing member opens the foreign object removing port by lifting force applied to is transmitted via the connection device Mold foreign matter removal device.   2. The blade member according to claim 1, wherein the pull-up member is a blade member provided with a blade in a direction that causes the liquid flowing in the outflow tube to swirl in a direction opposite to a swirling direction of the liquid in the main body. Cyclone type foreign matter removal device.   The connection device includes a connection shaft that fixedly connects the lifting member and the opening / closing body and is substantially rigid, and the connection shaft is provided on at least one of the outflow tube and the main body. The cyclone type foreign matter removing device according to claim 1 or 2, wherein the bearing member is slidably fitted in an axial direction, and the bearing member has an opening penetrating in a vertical direction.   4. The cyclone type according to claim 3, wherein the bearing member includes a first bearing member provided in the outflow tube and a second bearing member provided in an intermediate portion in the axial direction of the main body portion. Foreign matter removal device. A submerged pump installed in the liquid to pump the liquid;
A pump device comprising: the cyclone type foreign matter removing device according to any one of claims 1 to 4 connected to a suction port of the submerged pump.

Images