JP2018091230A - Hand pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hand pump capable of improving the operability of an operation lever.SOLUTION: A hand pump 1 includes: a base portion 11 installed in a deep well 100; a cylinder 21 which is installed in the deep well 100 and is connected to a lower end of the base portion 11; a piston 22 which is provided in a cylinder 21; a piston rod 14 which is connected to the piston 22, and is provided over the base portion 11 and the inside of the cylinder 21; a shaft body 31 which is connected to an upper end of the piston rod 14 at one end so as to rotate around an axis in a direction orthogonal to an axial direction of the piston rod 14; a coupling member 32 which is rotatably connected to the base portion 11 on one end side, and is rotatably connected to the other end of the shaft body 31 at the other end; and an operation lever 16 which is fixed to one end of the coupling member 32.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hand pump installed in a well or a water tank.

  Currently, a technique using a submersible pump for deep wells is known for pumping up well water in deep wells. Such a submersible pump is arranged in the well water of a deep well and supplies well water to the secondary side. However, in the configuration in which the well water is pumped using the submersible pump, the well water cannot be pumped in the event of a power failure or when there is no power supply due to the installation location.

  Therefore, there is a demand for a hand pump for deep wells that can arrange pistons and cylinders within the applicable well diameter. Further, as a hand pump, a technology is known in which a piston rod connecting shaft fixed to a piston is connected to an operation lever via a link mechanism, and the shaft reciprocates in the vertical direction by operation of the operation lever (for example, , See Patent Document 1). Also known is a so-called tandem hand pump technology in which a submersible pump is provided below the cylinder.

JP2015-21484A

  However, when the hand pump is used in a deep well, the distance from the operation lever to the piston and the cylinder becomes long, and the connecting shaft becomes long. When the connecting shaft becomes longer, a load in the horizontal direction is applied when the connecting shaft moves up and down, and the volume of water during pumping increases, so the load applied to the operation lever increases. For this reason, there exists a problem that the force required for operation of an operation lever becomes large and the operativity of a hand pump falls.

  Then, an object of this invention is to provide the hand pump which can improve the operativity of an operation lever.

  In order to solve the above problems and achieve the object, the hand pump of the present invention is configured as follows.

  According to one aspect of the present invention, a hand pump includes a base installed in a deep well, a cylinder installed in the deep well and connected to a lower end of the base, and a piston provided in the cylinder. The piston rod is connected to the piston and provided in the base and the cylinder, and one end is connected to the upper end of the piston rod so as to be rotatable about an axis perpendicular to the axial direction of the piston rod. A connecting member whose one end is rotatably connected to the base and the other end is rotatably connected to the other end of the shaft, and an operating lever fixed to the one end of the connecting member And comprising

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the hand pump which can improve the operativity of an operation lever.

Explanatory drawing which shows the structure of the hand pump which concerns on one Embodiment of this invention. Explanatory drawing which shows operation | movement of the same hand pump.

  Hereinafter, the hand pump 1 which concerns on one Embodiment of this invention is demonstrated using FIG.1 and FIG.2. FIG. 1 is an explanatory diagram showing a configuration of a hand pump 1 according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing an operation of a link mechanism 15 accompanying an operation of an operation lever 16 of the hand pump 1.

  As shown in FIG. 1, the hand pump 1 is installed in the deep well 100 and configured to be able to pump the well water 110 of the deep well 100. The hand pump 1 includes a base 11, a connecting pipe 12 connected to the lower end of the base 11, a pump part 13 connected to the lower end of the connecting pipe 12, a piston rod 14 that drives the pump part 13, and a piston rod 14. A link mechanism 15 connected to the control unit 15, an operation lever 16 for operating the link mechanism 15, and a submersible pump 17 provided at the lower end of the pump unit 13. In addition, the structure which does not have the submersible pump 17 may be sufficient as the hand pump 1.

  The base 11 is configured in a cylindrical shape that can connect the connecting pipe 12 to the lower end. The base 11 is fixed to a pedestal 101 provided at the opening of the deep well 100, for example. The base 11 is fixed to the pedestal 101 so that the lower end of the base 11 faces the water surface. As shown in FIG. 2, the base portion 11 is relative to the insertion hole 11 a provided at the upper end, the bearing 11 b provided in the insertion hole 11 a, the discharge port 11 c provided in the upper outer surface, and the discharge port 11 c. And a support portion 11d provided on the outer surface on the upper side. Such a base 11 constitutes a discharge casing of pumped water.

  The insertion hole 11a has an inner diameter through which the piston rod 14 can be inserted. The insertion hole 11a has a fixing groove for fixing the bearing 11b. The bearing 11b is fixed to the insertion hole 11a and supports the piston rod 14 so as to be slidable. The bearing 11b is configured to be able to support a load in the radial direction of the piston rod 14. The bearing 11 b seals between the base 11 and the piston rod 14. The bearing 11b is made of, for example, a resin material that does not affect water quality.

  The discharge port 11c discharges the pumped water. For example, as shown in FIG. 1, a discharge pipe 11e is fixed to the discharge port 11c. The support portion 11d is provided on the outer surface of the base portion 11 and extends upward. The tip of the support portion 11d supports a shaft body 31 (to be described later) of the link mechanism 15. A rotation shaft serving as a rotation center when the operation lever 16 is operated is supported.

  One end of the connecting pipe 12 is connected to the lower end of the base 11, and the other end is connected to the upper end of a cylinder 21 described later of the pump unit 13. The connecting pipe 12 fluidly connects between the base 11 and the cylinder 21. The connecting pipe 12 arranges the piston rod 14 in the internal space, and forms a well water flow path from the cylinder 21 to the base 11 in the internal space. The length of the connecting pipe 12 is appropriately set by connecting a plurality of pipes, for example, according to the depth of the deep well 100.

  The pump unit 13 includes a cylinder 21, a piston 22 provided in the cylinder 21, a first check valve provided at the lower end of the cylinder 21, and a second check valve provided in the piston 22. ing.

  The cylinder 21 is configured in a cylindrical shape whose axial center extends along the vertical direction. The lower end of the cylinder 21 is connected to the submersible pump 17. The cylinder 21 is provided with a first check valve at the lower end in the cylinder 21. The cylinder 21 has a precipitation valve at the upper end.

  The cylinder 21 constitutes a suction chamber inside the cylinder 21 and below the piston 22, and constitutes a discharge chamber inside the cylinder 21 and above the piston 22.

  The inner peripheral surface of the cylinder 21 is configured so that the piston 22 can slide. In the cylinder 21, the surface roughness of the inner peripheral surface and the circularity with respect to the axial center are formed with a predetermined accuracy. Here, the predetermined accuracy is an accuracy capable of preventing water leakage between the piston 22 and the cylinder 21 in the reciprocating motion of the piston 22, and can be set as appropriate according to the performance of the hand pump 1.

  The piston 22 is connected to the lower end of the piston rod 25. The piston 22 is provided in the piston yoke and the piston yoke, and has a piston seal that slides on the inner peripheral surface of the cylinder 21. The piston 22 is provided with a second check valve in the piston yoke.

  The piston rod 14 is a cylindrical shaft. A piston yoke is fixed to the lower end of the piston rod 14. The piston rod 14 is disposed across the base 11, the connecting pipe 12, and the cylinder 21, and extends to the outside of the base 11 through the insertion hole 11 a of the base 11. The upper end of the piston rod 14 is connected to a part of the link mechanism 15.

  The link mechanism 15 includes a shaft body 31, a connecting member 32, and a rotating shaft 33. One end of the shaft body 31 is connected to the upper end of the piston rod 14 via the rotating shaft 33. The shaft body 31 has an upper end connected to the connecting member 32 via the rotation shaft 33 at the other end. In other words, the length of the shaft body 31 is configured such that the distance between the centers of the rotating shafts 33 arranged at both ends of the shaft body 31 is longer than the movement distance of the piston rod 14 in the axial direction. Here, the moving distance in the axial direction of the piston rod 14 is a distance between the top dead center and the bottom dead center of the piston 22.

  The connecting member 32 is connected to the support portion 11 d of the base portion 11 through the rotating shaft 33 at the midway portion on one end side. The operation lever 16 is fixed to one end of the connecting member 32. The other end of the connecting member 32 is connected to the shaft body 31 via the rotating shaft 33.

  The rotating shaft 33 is disposed along a direction in which the axial direction is orthogonal to the axial direction of the piston rod 14. The rotating shaft 33 rotatably supports the shaft body 31 and the connecting member 32. The rotating shaft 33 is a pin, for example.

  In such a link mechanism 15, the connecting member 32 connected to the support portion 11 d rotates around the rotation shaft 33 of the support portion 11 d, so that the shaft body 31 connected to the connecting member 32 is connected to the piston rod 14. The shapes of the shaft body 31 and the connecting member 32 are set so that the shaft body 31 can move up and down the piston rod 14 while rotating about the rotation shaft 33. As shown in FIG. 2, the link mechanism 15 is configured such that when the piston 22 reciprocates between the top dead center and the bottom dead center, the upper end of the shaft body 31 connected to the connecting member 32 is connected to the connecting member 32. The shape of the shaft body 31 and the connecting member 32 is set so that the shaft 31 and the connecting member 32 can rotate around an arc-shaped locus having the other end of the connecting member 32 as a radius with the rotating shaft 33 connected to the support portion 11d as the center.

  The link mechanism 15 is located on one side in the direction orthogonal to the axial direction of the piston rod 14 at the top dead center and the bottom dead center of the piston 22 at the upper end of the shaft body 31. The shapes of the shaft body 31 and the connecting member 32 are set so that the shaft body 31 can rotate on an arcuate locus located on the other side in the direction orthogonal to the axial direction of the piston rod 14 in the middle of the dead center.

  Preferably, the link mechanism 15 is positioned in the direction perpendicular to the axial direction of the piston rod 14, that is, in the horizontal direction, at the top dead center and the bottom dead center of the piston 22 from the central axis of the piston rod 14 to the position of the upper end of the shaft body 31. And the maximum difference in three distances between the distance from the center axis of the piston rod 14 to the position of the upper end of the shaft body 31 at the intermediate position between the top dead center and the bottom dead center of the piston 22. The ratio when divided by the average of the distance is set within 30%. Here, the position of the upper end of the shaft body 31 is the connecting portion 35 of the shaft body 31 and the connecting member 32 in FIG.

  More preferably, the link mechanism 15 is configured such that the distance from the central axis of the piston rod 14 to the position of the upper end of the shaft body 31 at the top dead center and bottom dead center of the piston 22 in the horizontal direction, In addition, the distance from the central axis of the piston rod 14 to the position of the upper end of the shaft body 31 at the middle position of the bottom dead center is set to be the same.

  The operation lever 16 is fixed to one end of the connecting member 32. The operation lever 16 is a linear or curved rod-like member formed to a predetermined length.

  The submersible pump 17 is configured such that when the submersible motor is driven, the impeller in the pump casing is driven to pump water. The submersible pump 17 is fluidly connected to the cylinder 21 and configured to allow pumped water to the cylinder 21.

  The operation of the connecting portion 35 at the upper end of the shaft body 31 and the end portion of the connecting member 32 that are connected by the rotating shaft 33 in accordance with the vertical movement of the piston 22 of the hand pump 1 configured as described above will be described with reference to FIG. explain. The connecting portion 35 at the bottom dead center of the piston 22 is located on one side in a direction orthogonal to the central axis C of the piston rod 14, as indicated by reference numeral 35-1. Next, when the operating lever 16 is operated in a direction in which the piston 22 is directed toward the top dead center, the connecting member 32 is rotated, the connecting portion 35 is moved upward in a circular arc, and is orthogonal to the central axis C. It moves to the other side, and is located at a position farthest from the central axis C in this direction, as indicated by reference numeral 35-2, at an intermediate point between the top dead center and the bottom dead center. When the operating lever 16 is further operated, the connecting portion 35 moves upward in a circular arc from the intermediate point, and at the top dead center in the direction orthogonal to the central axis C, as shown by reference numeral 35-3. Move to the side.

  According to the hand pump 1 configured in this manner, the piston rod 14 and the connecting member 32 are provided with the shaft body 31 which is a joint member connected via the rotating shaft 33, and the shaft body 31 is mounted on the piston 22. Configure longer than the distance between the dead center and the bottom dead center. With this configuration, the shaft body 31 can minimize the rotation angle of the connecting portion 35 around the end connected to the piston rod 14 when the piston 22 moves up and down. As a result, it is possible to prevent the shaft body 31 from being inclined with respect to the piston rod 14 in the up-and-down movement, so that the load required to operate the operation lever 16 can be reduced as much as possible.

  Further, the hand pump 1 has a connecting portion when the connecting portion of the support portion 11d and the connecting member 32 is a fulcrum, the end portion of the operation lever 16 is a power point, and the connecting portion 35 of the shaft body 31 and the connecting member 32 is an action point. 35 moves along an arcuate locus. The link mechanism 15 is set so that the shaft body 31 rotates so that the arcuate locus intersects the central axis C of the piston rod 14. The link mechanism 15 has the above-described configuration in the horizontal position at the top dead center and the bottom dead center of the connecting portion 35 and the horizontal position at the intermediate point between the top dead center and the bottom dead center of the connecting portion 35. Thus, the load applied to the piston rod 14 becomes substantially uniform in the horizontal direction.

  For this reason, it is possible to prevent an uneven load from being applied to the bearing 11b by the piston rod 14 as much as possible, and to prevent the piston rod 14 from interfering with the insertion hole 11a of the base portion 11 as much as possible. It is possible to prevent a load from being applied. As a result, it is possible to prevent the piston rod 14, the bearing 11b, and the like from being worn, and it is possible to improve the life of the hand pump 1.

  As described above, according to the hand pump 1 according to the embodiment of the present invention, the operability of the operation lever 16 can be improved and the life can be improved.

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. In addition, the embodiments may be appropriately combined as much as possible, and in that case, the combined effect can be obtained. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the column of the effect of the invention Can be obtained as an invention.

  DESCRIPTION OF SYMBOLS 1 ... Pump, 11 ... Base part, 11a ... Insertion hole, 11b ... Bearing, 11c ... Discharge port, 11d ... Support part, 11e ... Discharge pipe, 12 ... Connection pipe, 13 ... Pump part, 14 ... Piston rod, 15 ... Link Mechanism 16 ... Operating lever 17 ... Submersible pump 21 ... Cylinder 22 ... Piston 25 ... Piston rod 31 ... Shaft body 32 ... Connecting member 33 ... Rotating shaft 35 ... Connecting part 100 ... Deep well 101 ... pedestal, 110 ... well water.

Claims (7)

A base installed in a deep well;
A cylinder installed in the deep well and connected to the lower end of the base;
A piston provided in the cylinder;
A piston rod connected to the piston and provided within the base and the cylinder;
A shaft body, one end of which is connected to the upper end of the piston rod so as to be rotatable around an axis perpendicular to the axial direction of the piston rod;
One end side is rotatably connected to the base, and the other end is rotatably connected to the other end of the shaft body;
An operation lever fixed to the one end of the connecting member;
Hand pump equipped with.   The hand pump according to claim 1, wherein the axial length of the shaft body is longer than a distance between a top dead center and a bottom dead center of the piston.   The hand pump according to claim 2, wherein the base includes a bearing that supports the piston rod.   When the piston reciprocates between the top dead center and the bottom dead center by operating the operation lever, the other end of the shaft connected to the connecting member is connected to the piston rod. The hand pump according to claim 2, wherein the hand pump is rotated around an arcuate locus centering on the one end and the one end of the connecting member and having the other end of the connecting member as a radius.   The other end of the shaft is located on one side of the top dead center and the bottom dead center of the piston in a direction perpendicular to the axial direction, and is intermediate between the top dead center and the bottom dead center of the piston. The hand pump according to claim 4, which is located on the other side in a direction orthogonal to the axial direction at a point.   The distance in the direction perpendicular to the axial direction from the axial direction when the other end of the shaft is located on one side of the top dead center and the bottom dead center of the piston in the direction perpendicular to the axial direction. Is the same distance as the distance in the direction perpendicular to the axial direction from the axial direction when positioned on the other side of the direction perpendicular to the axial direction between the top dead center and the bottom dead center of the piston The hand pump according to claim 5.   The hand pump according to claim 1, further comprising a submersible pump connected to a lower end of the cylinder.