Spacer and pump device

Abstract

To provide a spacer that allows a vertical pump to be used regardless of whether there is a base or not, with a simple structure, and provide a casing unit, and a pump device.SOLUTION: A spacer 13 fastened to casing flanges 34, 35 formed on a pump casing 21, comprises a spacer part 41 in which an opening 41a fluidly connected to the casing flanges 34, 35 is formed, and leg parts 42 that are provided in the spacer part 41 and can be anchored to an installation surface.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention is a spacer used in a vertical pump. Sa and and pump devices. [Background technology]

[0002] A known pump device is a vertical pump in which the rotation axis is oriented along the direction of gravity. Such pump devices include types that are anchored using a base as an installation surface and types that do not have a base. Pump devices that can be used both with and without a base are also known. Pump devices that use spacers or other components to improve the strength of the pump flange are also known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 63-031283 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, in a pump device in which the presence or absence of a base is determined depending on the model (type), different parts must be used, which poses a problem of increased capital investment for parts manufacturing and management of products and parts.

[0005] For example, if a pump device is designed to be usable with or without a base, it would be necessary to adjust the flange formed on the casing to accommodate bolt holes, making it difficult to convert from a casing with holes to a casing without holes. Furthermore, the casing seating surface would need to be adjusted, requiring a seat for the base in the product. Because the casing is formed by casting, there is a risk of porosity and the weight of the casting increases. Furthermore, because unnecessary components are formed in the casing even when a base is not used, there is a problem of increased manufacturing costs when a pump device without a base is created.

[0006] Therefore, the present invention provides a space-saving vertical pump that can be used with or without a base with a simple configuration. Sa and The object of the present invention is to provide a pump device. [Means for solving the problem]

[0007] A spacer according to one aspect of this embodiment is a spacer that is fastened to a casing flange formed on a pump casing, and includes a spacer portion having an opening that fluidly connects to the casing flange, and legs that are provided on the spacer portion and can be anchored to an installation surface. [Effects of the Invention]

[0008] According to the present invention, a space-saving vertical pump can be provided with a simple structure and can be used with or without a base. Sa and and a pumping device. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a side view showing a configuration of a pump device according to an embodiment of the present invention. [Figure 2] FIG. [Figure 3] 2 is a perspective view showing the configuration of a casing unit including a pump casing and a spacer used in the pump device. FIG. [Figure 4]FIG. [Figure 5] FIG. 10 is a cross-sectional view showing a modified example of the spacer. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, examples of the spacer 13, the casing unit, and the pump device 1 according to the embodiment will be described with reference to FIGS.

[0011] Fig. 1 is a side view showing the configuration of a pump device 1 according to an embodiment of the present invention. Fig. 2 is a top view showing the configuration of the pump device 1. Fig. 3 is a perspective view showing the configuration of a casing unit including a pump casing 21 and a spacer 13 used in the pump device 1. Fig. 4 is a perspective view showing the configuration of the spacer 13. Fig. 5 is a cross-sectional view schematically showing a modified example of the spacer 13.

[0012] 1, the pump device 1 is a vertical pump installed with its axial direction aligned with the direction of gravity. The pump device 1 includes a motor 11, a pump 12, a spacer 13, and a packing 14.

[0013] The motor 11 includes a motor casing 11a, a stator provided in the motor casing 11a, a rotor rotatable relative to the stator, and a motor shaft 11b fixed to the rotor. The motor casing 11a of the motor 11 is fixed to the pump 12.

[0014] The pump 12 includes a pump casing 21, a casing cover 22 that covers the pump casing 21, and an impeller 23 that is housed in the pump casing 21. The pump 12 is connected to a pipe flange 100a of the pipe 100.

[0015] The pump casing 21 comprises a casing portion 31 forming a pump chamber, a suction portion 32 communicating with the pump chamber, a discharge portion 33 communicating with the pump chamber, a suction flange 34 formed at the end of the suction portion 32, and a discharge flange 35 formed at the end of the discharge portion 33.

[0016] The casing portion 31 forms a pump chamber, such as a volute-shaped one, that houses the impeller 23. The top surface of the casing portion 31 has an opening that allows the impeller 23 to be inserted, and bolt holes 31a are formed around the opening into which bolts, which are fastening members that secure the casing cover 22, are inserted. Note that the bolt holes 31a may be holes into which bolts are inserted, or may be female threads into which the bolts are screwed.

[0017] Suction section 32 extends, for example, from the lower end of casing section 31 toward the outer circumferential surface of casing section 31. Suction section 32 forms a flow path from the primary side to the pump chamber of casing section 31. The central axis of the opening at the end of suction section 32 opposite casing section 31 extends in a direction perpendicular to the central axis of casing section 31 (the rotation axis of impeller 23 and the rotation axis of motor shaft 11b of motor 11).

[0018] Discharge portion 33 extends, for example, from a part of the outer peripheral surface of casing portion 31 in a direction perpendicular to the central axis (the rotation axis of impeller 23 and the rotation axis of motor shaft 11b of motor 11) of casing portion 31. For example, the opening at the end of suction portion 32 and the opening at the end of discharge portion 33 are arranged coaxially.

[0019] The suction flange 34 is formed integrally with the suction portion 32 on the outer peripheral surface of the end of the suction portion 32. The suction flange 34 has bolt holes (first bolt holes) 34a through which bolts serving as fastening members are inserted. The suction flange 34 has support legs 34b that protrude downward from the lower end of the suction portion 32. The lower surfaces of the support legs 34b are formed flat. For example, two support legs 34b are formed on the suction flange 34 side by side in a direction perpendicular to both the central axis of the opening at the end of the suction portion 32 and the direction of gravity. The support legs 34b can be grounded.

[0020] The discharge flange 35 is formed integrally with the discharge portion 33 on the outer peripheral surface of the end of the discharge portion 33. The discharge flange 35 has bolt holes (first bolt holes) 35a through which a plurality of bolts serving as fastening members are inserted. The discharge flange 35 has support legs 35b that protrude downward from the lower end of the suction portion 32. The lower surfaces of the support legs 35b are formed flat. For example, two support legs 35b (a pair) are formed on the discharge flange 35 side by side in a direction perpendicular to both the central axis of the opening at the end of the discharge portion 33 and the direction of gravity. The support legs 35b can be grounded. That is, when the spacer 13 is not used, the support legs 34b of the suction flange 34 and the support legs 35b of the discharge flange 35 support the pump device 1 by being grounded.

[0021] The suction flange 34 and the discharge flange 35 are casing flanges and are formed, for example, in the same shape.

[0022] The casing cover 22 closes an opening formed in the upper part of the casing portion 31 of the pump casing 21. The casing cover 22 has a shaft sealing member such as a mechanical seal that seals the motor shaft 11b. The casing cover 22 has a lower end fastened to the pump casing 21 in the axial direction and an upper end fastened to the motor casing 11a.

[0023] The impeller 23 has, for example, a pair of shrouds and a plurality of blades. The impeller 23 is fixed to the motor shaft 11b and housed in the pump chamber. The impeller 23 has an inlet port facing the suction section 32 and an outlet port formed on the outer periphery. The impeller 23 rotates in conjunction with the rotation of the motor shaft 11b, thereby sucking in water from the inlet port and discharging pressurized water from the outlet port.

[0024] The spacer 13 is disposed, for example, between the pipe flange 100a of the pipe 100 and the casing flanges (suction flange 34, discharge flange 35), and is fastened to the pipe flange 100a and the casing flanges 34, 35. The spacer 13, together with the pump casing 21, constitutes a casing unit. For example, the spacer 13, the pipe flange 100a, and the casing flanges 34, 35 are fastened together by fastening members 99 such as bolts and nuts.

[0025] The spacer 13 includes a spacer portion 41 and a pair of legs 42 integrally formed below the spacer portion 41. The spacer portion 41 is formed with an opening 41a communicating with the pipe 100 and the suction portion 32, and with the pipe 100 and the discharge portion 33, and with a plurality of bolt holes (second bolt holes) 41b arranged around the opening 41a. The opening 41a is formed with an inner diameter equal to or larger than the maximum diameter of the pipe 100, the suction portion 32, and the discharge portion 33 to which it is intended to be attached, so that the pipe 100, the suction portion 32, and the discharge portion 33 can be connected with pipes 100 having different diameters, for example. Note that the opening 41a may be formed with a female thread on its inner circumferential surface so that a male-threaded pipe 100 can be screwed thereto, as shown in FIG. 5.

[0026] For example, bolt holes 41b are configured to allow attachment even to suction flange 34 and discharge flange 35 of pump casing 21 having different bore diameters. As a specific example, bolt holes 41b are formed larger than bolt holes 34a of suction flange 34 and bolt holes 35a of discharge flange 35. Note that bolt holes 41b are round holes, but may also be elongated holes or the like. Spacer 13 is, for example, a casting formed by FC. Spacer 13 is fixed to pump casing 21, for example, with a pair of legs 42 facing the pump casing 21 (the side facing the center of pump 12).

[0027] The leg 42 includes a wall 42a extending in the direction of gravity from the spacer 41, a seat 42b extending horizontally at the lower end of the wall 42a, and a protrusion 42c formed on the seat 42b and protruding upward. The leg 42 is grounded. The leg 42 can be anchored to an installation surface such as a base.

[0028] The wall portion 42a is molded integrally with the spacer portion 41 and is disposed below the spacer portion 41. The wall portions 42a of the pair of leg portions 42 are formed inclined with respect to the direction of gravity so that the gap between them narrows from the lower end side toward the upper end side.

[0029] The seat 42b has a recess 42d on its underside. The seat 42b also has a bolt hole (anchor bolt hole) 42e through which an anchor bolt is inserted to secure the leg 42 to the installation surface. The seat 42b may have a base seat surface for anchoring without having the bolt hole 42e. The recess 42d is recessed upward from the underside of the seat 42b, for example. The recess 42d also opens on the side of the seat 42b opposite the protruding direction of the seat 42b.

[0030] The protrusion 42c protrudes upward from the upper surface of the seat 42b. The distance between the protrusions 42c of the pair of legs 42 is formed slightly larger than the distance between the outer surfaces of a pair of support legs (a pair of support legs 34b and a pair of support legs 35b) formed on the casing flanges (suction flange 34 and discharge flange 35) in the opposing direction. In other words, the pair of support legs 34b and 35b are formed to be able to be positioned between the pair of protrusions 42c. By abutting against the pair of support legs 34b and 35b, the protrusion 42c guides the relative positions of the casing flanges (suction flange 34 and discharge flange 35) and the spacer 13 in the width direction and the circumferential position around the central axis of the opening of the casing flanges (suction flange 34 and discharge flange 35).

[0031] When the spacer 13 is attached to the casing flanges (suction flange 34, discharge flange 35) and the spacer 13, a gap is generated between the lower surfaces of the support legs 34b, 35b and the upper surface of the seat 42b. That is, the distance from the center of the opening 41a of the spacer 13 to the upper surface of the seat 42b is greater than the distance from the center of the opening of the casing flanges (suction flange 34, discharge flange 35) to the support legs 34b, 35b.

[0032] The packing 14 is provided between a pair of support legs 34b, 35b of the casing flanges (suction flange 34, discharge flange 35) and the seat portions 42b of a pair of leg portions 42 of the spacer 13. The packing 14 is made of an elastically deformable material such as rubber. The packing 14 supports the pair of support legs 34b, 35b and prevents or suppresses vibrations of the motor 11 or pump 12 from being transmitted to the seat portions 42b via the support legs 34b, 35b. In other words, the packing 14 reduces or damps vibrations generated by the motor 11 or pump 12. For example, the thickness of the packing 14 is thicker than the distance between the lower surfaces of the support legs 34b, 35b and the upper surface of the seat portions 42b when the spacer 13 is attached to the casing flange.

[0033] Next, the dimensional relationship between the pump casing 21 and the pair of spacers 13 will be described with reference to Figure 2. In the following description, the pump casing 21 and the pair of spacers 13 will be described in a position where they are fastened together by fastening members 99.

[0034] L1 denotes the distance between the casing surfaces of pump casing 21, that is, the distance between the main surface of suction flange 34 facing spacer 13 and the main surface of discharge flange 35 facing spacer 13. Furthermore, L2 denotes the distance between bolt holes 42e formed in leg portions 42 of a pair of spacers 13, for example, the distance between the centers of bolt holes 42e of leg portions 42 of a pair of spacers 13. Distance L2 is smaller than distance L1.

[0035] Furthermore, W1 denotes the distance between the ends of the pump casing 21 and the motor 11 of the pump device 1, which is the maximum width on the circumferential outer surfaces thereof, and W2 denotes the distance between a pair of bolt holes 42e formed in a pair of legs 42 of one spacer 13, for example, the distance between the centers of the bolt holes 42e of the pair of spacers 13. Here, distance W1 is, for example, the distance between the ends in the same direction as distance W2. In this embodiment, distance W1 is, for example, the distance between a part of the outer circumferential surface of the pump casing 21 and an end of an electrical box provided in the motor 11 in a direction perpendicular to the rotation center of the impeller 23. Distance W2 is shorter than distance W1.

[0036] The pump device 1 configured in this manner can be attached in any manner by selectively using, for example, the spacer 13. Therefore, the spacer 13 can improve the degree of freedom in the attachment method of the pump device 1.

[0037] For example, when the spacer 13 is not used, the pump device 1 has the suction flange 34 and the discharge flange 35 connected to the pipe 100. In this case, for example, by making the distance from the installation surface to the central axis of the pipe 100 the same as the distance from the lower ends of the support legs 34b, 35b of the suction flange 34 and the discharge flange 35 to the central axis of the opening at the end of the discharge portion 33, the support legs 34b, 35b are grounded when the suction flange 34 and the discharge flange 35 are connected to the pipe 100. As a result, the pump device 1 is supported by the pipe 100 and the suction flange 34 and the discharge flange 35. As another example, by making the distance from the installation surface to the central axis of the pipe 100 greater than the distance from the lower ends of the support legs 34b, 35b of the suction flange 34 and the discharge flange 35 to the central axis of the opening at the end of the discharge portion 33, the pump device 1 is supported by the pipe 100.

[0038] Furthermore, for example, when the spacer 13 is used, the pump device 1 connects the suction flange 34 and the discharge flange 35 to the pipe flange 100a of the pipe 100 via the spacer 13. The spacer 13 is grounded to the installation surface. Alternatively, the spacer 13 is anchored to the base, which is the installation surface, with anchor bolts or the like. In this way, the pump device 1 is supported by the pipe 100 and the spacer 13, or is supported by the pipe 100 and the spacer 13 and then fixed to the installation surface.

[0039] Therefore, the pump device 1 can be used for both models that do not require anchoring and models that do. In other words, the pump device 1 as a product can be used with or without anchoring (with or without a base). Because the pump 12 can be used regardless of whether anchoring is required, there is no need to provide the pump casing 21 with a seat with a base, allowing for dual use, reducing the risk of voids and the weight (cast weight) of the pump casing 21. Therefore, there is no need to vary the shape of the pump casing 21 depending on whether anchoring is required. Furthermore, there is no need to use dedicated molds when casting the pump casing 21 or dedicated components for the pump casing 21. This eliminates the need to increase the number of models, thereby reducing investment amounts such as initial costs.

[0040] Furthermore, the spacer 13 can be made into an integral casting structure by integrating the spacer portion 41 and the pair of legs 42, thereby reducing the number of parts. The spacer 13 can also be used to adjust the distance between the casing flanges (suction flange 34 and discharge flange 35) and the piping 100, rather than for anchoring or support.

[0041] Furthermore, since the spacer 13 can be used for both the suction flange 34 and the discharge flange 35, the spacer 13 can be used for both purposes. Furthermore, the convex portion 42c of the spacer 13 can guide the position of the spacer 13 in the width direction relative to the casing flange and the position of the spacer 13 in the circumferential direction of the casing flange. Furthermore, the relative position of the spacer 13 and the pump 12 (pump casing 21) can be adjusted by the abutment of the support legs 34b, 35b and the convex portion 42c, which improves the ease of installation of the pump device 1.

[0042] Furthermore, in the pump device 1, by providing the packing 14 between the spacer 13 and the pump casing 21, it is possible to suppress vibration and noise caused by vibration.

[0043] Furthermore, by making the bolt holes 41b of the spacer 13 larger or elongated than the bolt holes 34a, 35a of the suction flange 34 and the discharge flange 35, the spacer 13 can be used for casing flanges of different diameters. That is, the spacer 13 can be used for pumps 12 of different diameters. Note that, in order to configure the spacer 13 to be used for casing flanges of different diameters without making the bolt holes 41b of the spacer 13 larger or elongated than the bolt holes 34a, 35a of the suction flange 34 and the discharge flange 35, the spacer 13 may be configured to have more bolt holes 41b than the plurality of bolt holes 34a, 35a of the casing flanges. That is, among the plurality of bolt holes 41b formed in the spacer 13, the same number of bolt holes 41b as the number of bolt holes 34a of the suction flange 34 (the number of bolt holes 35a of the discharge flange 35) that are arranged in the same manner as the plurality of bolt holes 41b of the casing flange to be fastened may be configured to be fastened to the plurality of bolt holes 41b of the casing flange. That is, by forming a plurality of bolt holes 41b in the spacer 13 for each bolt hole 34a, 35a of the casing flange, the plurality of bolt holes 41b of the spacer 13 and the plurality of bolt holes 34a, 35a of the casing flange may be fastened with bolts or the like, regardless of whether the casing flanges have different diameters.

[0044] The thickness and number of packings 14 can be adjusted and used to adjust the height of the spacer 13 and the casing flange. That is, the packings 14 can also function as an adjustment member for adjusting the height of the spacer 13 and the casing flange. Note that the pump device 1 may be configured to use a shim or the like made of a metal material in addition to or instead of the packings 14 as an adjustment member for adjusting the height of the spacer 13 and the casing flange.

[0045] Furthermore, the recess 42d provided in the seat portion 42b of the spacer 13 can improve the ease of removing a core and the like when casting the spacer 13. Furthermore, the recess 42d can prevent voids, sink marks, and the like from occurring in the seat portion 42b, the protrusion 42c, and the like, and can reduce the amount of material used to mold the spacer 13.

[0046] Furthermore, by setting the dimensional relationships of the pump device 1 such that the distances are L1>L2 and W1>W2, the spacer 13 can be located inside the pump casing 21, so the installation area of ​​the pump device 1 is not increased by the spacer 13.

[0047] The present invention is not limited to the above-described embodiments, and various modifications can be made in the implementation stage without departing from the spirit of the invention. Furthermore, the embodiments may be implemented in appropriate combinations, in which case the combined effects can be obtained. Furthermore, the above-described embodiments include various inventions, and various inventions can be extracted by combining selected elements from the disclosed elements. For example, if the problem can be solved and the desired effect can be obtained even if some elements are deleted from all elements shown in the embodiments, the configuration from which these elements are deleted can be extracted as an invention. The following is a description equivalent to the invention described in the original claims of the present application. [1] A spacer fastened to a casing flange formed on a pump casing, a spacer portion having an opening formed therein that is fluidly connected to the casing flange; a leg portion provided on the spacer portion and capable of being anchored to an installation surface; A spacer comprising: [2] The spacer according to [1], wherein the spacer portion and the leg portion are of an integral structure. [3] At least one of the spacer portion and the leg portion has a convex portion that abuts against a part of the pump casing around the central axis of the casing flange and determines the position of the pump casing around the central axis. A spacer as described in [2]. [4] A pump casing having a casing portion that houses an impeller and a casing flange provided on the casing portion; spacer portions fastened to the casing flanges, each having an opening fluidly communicating with the fastened casing flange, and a leg portion provided on the spacer portion and capable of being anchored to an installation surface; A casing unit comprising: [5] The casing unit according to [4], wherein the spacer is provided between the casing flange and a pipe fixed to the casing flange. [6] The casing flange has a plurality of first bolt holes; the spacer portion has a plurality of second bolt holes around the opening, The casing unit described in [5], wherein the second bolt holes are larger in shape than the first bolt holes and are provided in the same number as the plurality of first bolt holes, or are provided in a greater number than the plurality of first bolt holes and are fastened to the plurality of first bolt holes in the same number as the plurality of first bolt holes. [7] At least one of the spacer portion and the leg portion has a convex portion, The casing unit according to [6], wherein the pump casing can abut against the protrusion around the central axis of the casing flange. [8] Two casing flanges are provided on the pump casing, The leg portion has an anchor bolt hole formed therein into which an anchor bolt is inserted, A casing unit as described in [7], wherein the width of the anchor bolt holes formed in the leg portions of the spacers fastened to the two casing flanges, respectively, in the arrangement direction of the spacers, is smaller than the casing face-to-face dimension of the pump casing. [9] The anchor bolt holes are formed in pairs in the leg portion, aligned in a direction perpendicular to the central axis of the casing flange, [8] A casing unit according to [8], wherein the width of the two anchor bolt holes is smaller than the maximum width of the pump casing and the motor fixed to the pump casing.

[10] A casing unit as described in [7], which is provided with an adjustment member disposed between the leg and the casing flange and which adjusts the height of the spacer and the casing flange.

[11] A casing unit according to any one of [5] to

[10] , in which an impeller is housed; a motor connected to the impeller and fixed to the casing unit; A pump device comprising: [Explanation of symbols]

[0048] 1...pump device, 11...motor, 11a...motor casing, 11b...motor shaft, 12...pump, 13...spacer, 14...packing, 21...pump casing, 22...casing cover, 23...impeller, 31...casing portion, 31a...bolt hole, 32...suction portion, 33...discharge portion, 34...suction flange (casing flange), 34a...bolt hole (first bolt hole), 34b...support leg, 35...discharge flange (casing flange), 35a...bolt hole (first bolt hole), 35b...support leg, 41...spacer portion, 41a...opening, 41b...bolt hole (second bolt hole), 42...leg portion, 42a...wall portion, 42b...seat portion, 42c...convex portion, 42d...recess, 42e...bolt hole (anchor bolt hole), 99...fastening member, 100...piping, 100a...piping flange.

Claims

1. A spacer fastened to a casing flange formed on a pump casing, a spacer portion having an opening formed therein that is fluidly connected to the casing flange; a leg portion provided on the spacer portion and capable of being anchored to an installation surface; Equipped with the spacer portion and the leg portion are integrally formed, At least one of the spacer portion and the leg portion has a convex portion that abuts against a part of the pump casing around the central axis of the casing flange.

2. a casing unit including: a pump casing having a casing portion that houses an impeller and a casing flange provided on the casing portion; spacer portions that are fastened to the casing flanges and have openings that are fluidly continuous with the fastened casing flanges; and a spacer that is fastened to the spacer portion and has legs that can be anchored to an installation surface; a motor connected to the impeller and fixed to the casing unit; Equipped with the spacer portion and the leg portion are integrally formed, At least one of the spacer portion and the leg portion has a protrusion that abuts against a part of the pump casing around the central axis of the casing flange.

3. the casing flange has a plurality of first bolt holes; the spacer portion has a plurality of second bolt holes around the opening, 3. The pump device according to claim 2, wherein the second bolt holes are larger in shape than the first bolt holes and are provided in the same number as the plurality of first bolt holes, or are provided in a greater number than the plurality of first bolt holes and are fastened to the same number of the plurality of first bolt holes as the plurality of first bolt holes.

4. Two casing flanges are provided on the pump casing, The leg portion has an anchor bolt hole formed therein into which an anchor bolt is inserted, 4. The pump device according to claim 3, wherein a width of the anchor bolt holes formed in the leg portions of the spacers fastened to the two casing flanges, respectively, in the arrangement direction of the spacers is smaller than a casing face-to-face dimension of the pump casing.

5. The anchor bolt holes are formed in pairs in the leg portion and aligned in a direction perpendicular to the central axis of the casing flange, 5. The pump device according to claim 4, wherein the width of the two anchor bolt holes is smaller than the maximum width of the pump casing and the motor fixed to the pump casing.

6. A pump device as described in claim 2, wherein the casing flange has a flat underside and a support leg protruding downward.

7. The pump device according to claim 2 , further comprising an adjustment member disposed between the leg portion and the casing flange, for adjusting the height of the spacer and the casing flange.

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