JPWO2020250304A1 - Casing, line pump and casing manufacturing method - Google Patents

Abstract

The casing according to the present invention has a lower casing in which a first connection port to which a first pipe through which a fluid flows is connected is formed on a side surface, and a second casing rotatably provided on the upper surface of the lower casing through which a fluid flows. It is provided with an upper casing in which pipes are connected and a second connection port having a variable angle with the first connection port is formed on a side surface.

Description

The present invention relates to a casing attached to a pipe, a line pump including the casing, and a method for manufacturing the casing.

Conventionally, a line pump provided in the middle of piping inside a housing such as an air conditioner and a floor heating facility has been known. Such a line pump includes an impeller that is driven by a motor and a casing that houses the impeller. Further, the casing is formed at a position where the suction port and the discharge port face each other with the center of the casing in between. That is, the suction port and the discharge port are formed on a center line drawn so as to pass through the center of the rotating surface of the impeller in the casing.

As such a casing, in Patent Document 1, a volute through which a fluid flows toward a discharge port is formed, and a draining portion, which is a starting point at which the volute begins to wind, is formed so as to be located on the rotation direction side of the impeller from the center line. The casing is disclosed. Further, the casing of Patent Document 1 is formed so that the angle formed by the tangent line at the tip of the draining portion and the center line is 90 ° or less. Patent Document 1 aims to improve the formability by reducing the portion of the casing that cannot be released from the molded product with the two dies in the casting of the casing.

Japanese Unexamined Patent Publication No. 7-20897

However, in the casing of the line pump disclosed in Patent Document 1, the suction port and the discharge port are formed on the center line of the casing. That is, the line pump of Patent Document 1 can be applied only when the openings of the pipes connected to the line pump face each other. For this reason, for example, it is difficult for the line pump of Patent Document 1 to be installed in a corner of a housing or a place where an apparatus exists next to it. Further, by avoiding such an arrangement, the length of the pipe becomes long, which makes it difficult to reduce the size of the housing. Therefore, there is a risk of reducing the degree of freedom in design.

The present invention has been made to solve the above problems, and provides a casing, a line pump, and a method for manufacturing a casing, which improves the degree of freedom in design.

The casing according to the present invention has a lower casing in which a first connection port to which a first pipe through which a fluid flows is connected is formed on a side surface, and a second casing rotatably provided on the upper surface of the lower casing through which a fluid flows. It is provided with an upper casing in which pipes are connected and a second connection port having a variable angle with the first connection port is formed on a side surface.

According to the present invention, since the angle formed by the first connection port and the second connection port is variable, it can be applied even when the openings of the pipes connected to the line pump do not face each other. Therefore, the line pump does not limit the installation location, the shape of the housing, and the like. Therefore, the degree of freedom in design can be improved.

It is a perspective view which shows the line pump 100 which concerns on Embodiment 1. FIG. It is sectional drawing which shows the line pump 100 which concerns on Embodiment 1. FIG. It is a top view which shows the lower casing 11 which concerns on Embodiment 1. FIG. It is a side view which shows the lower casing 11 which concerns on Embodiment 1. FIG. It is a bottom view which shows the upper casing 12 which concerns on Embodiment 1. FIG. It is a side view which shows the upper casing 12 which concerns on Embodiment 1. FIG. It is a bottom view which shows the upper casing 112 which concerns on Embodiment 2. FIG. It is sectional drawing which shows the line pump 300 which concerns on Embodiment 3. FIG.

Embodiment 1.
Hereinafter, the casing 1 of the line pump 100 according to the first embodiment will be described with reference to the drawings. FIG. 1 is a perspective view showing a line pump 100 according to the first embodiment. FIG. 2 is a cross-sectional view showing the line pump 100 according to the first embodiment. As shown in FIGS. 1 and 2, the line pump 100 includes a casing 1, a flange 2, a frame 3, a motor 4, and an impeller 5.

(Casing 1)
The casing 1 is hollow, and a fluid flows inside the casing 1. Further, the casing 1 has a lower casing 11 forming the lower part of the casing 1 and an upper casing 12 forming the upper part of the casing 1.

(Lower casing 11)
FIG. 3 is a top view showing the lower casing 11 according to the first embodiment. FIG. 4 is a side view showing the lower casing 11 according to the first embodiment. As shown in FIGS. 3 and 4, the lower casing 11 has a lower pipe connecting portion 21, a pipe portion 22, a lower joining portion 23, and a mounting base 24.

(Lower pipe connection 21)
The lower pipe connection portion 21 is a substantially circular member that constitutes the side surface of the lower casing 11 and is provided with legs that support the line pump 100. The lower pipe connection portion 21 is formed with an open first connection port 31. The opening of the first pipe 301, which is an introduction pipe for introducing a fluid into the line pump 100, is connected to the lower pipe connection portion 21. The first pipe 301 may be a discharge pipe for discharging the fluid from the line pump 100 instead of the introduction pipe.

(Pipe 22)
The tube portion 22 has a hollow tubular shape. The lower pipe connection portion 21 is connected to one end of the pipe portion 22, and the fluid introduced from the first connection port 31 flows inside. The pipe portion 22 is shaped so as to incline downward from one connected end of the lower pipe connecting portion 21 and then extend substantially horizontally. A lower opening 32 opened in the vertical direction is formed at the other end and the center of the upper portion of the pipe portion 22.

(Lower joint 23)
The lower joint portion 23 is provided in the pipe portion 22 so as to surround the lower opening 32 formed in the pipe portion 22. The lower joint portion 23 has an edge portion 41, a fitting portion 42, a lower fastening circular portion 43, and a lower fastening portion 44. The edge portion 41 is a member that surrounds the outer periphery of the lower opening 32, and is formed higher than the fitting portion 42 and the lower fastening circular portion 43. The fitting portion 42 is a member that surrounds the outer periphery of the edge portion 41, and is formed higher than the lower fastening circular portion 43. The fitting portion 42 may be provided with a sealing material. The sealing material is, for example, a packing or an O-ring, and if it is a circular sealing material, the inner diameter of the sealing material is equal to the outer diameter of the edge 41. The lower fastening circular portion 43 is a member that surrounds the outer circumference of the fitting portion 42. In this way, the lower joint portion 23 is divided into three stages in height, and is formed so as to be lowered in order from the center.

The lower fastening portion 44 is a member that protrudes from the lower fastening circular portion 43 to the outside of the line pump 100. For example, three lower fastening portions 44 are provided, one is provided at a position facing one end of the pipe portion 22, and two are provided at intervals of 90 ° in different directions from the lower fastening portion 44. It is provided in a vacant position. Each lower fastening portion 44 is located on the same circumference. The number of lower fastening portions 44 may be two or four or more. Further, each lower fastening portion 44 is formed with a lower bolt hole 45 into which a bolt 46 is inserted extending in the vertical direction. The lower bolt hole 45 is, for example, a through hole through which the bolt 46 is inserted.

(Mounting base 24)
The mounting base 24 is a pedestal provided at the lower part of the pipe portion 22, located at the lowermost part of the line pump 100, and placed on the floor or the like. The mounting base 24 stabilizes the center of gravity of the line pump 100. This makes it possible to prevent the line pump 100 from tipping over when the line pump 100 is installed at the installation position.

(Upper casing 12)
FIG. 5 is a bottom view showing the upper casing 12 according to the first embodiment. FIG. 6 is a side view showing the upper casing 12 according to the first embodiment. As shown in FIGS. 5 and 6, the upper casing 12 has an impeller housing portion 51, an upper joint portion 52, and an upper pipe connecting portion 53.

(Imperial wheel storage section 51)
The impeller housing portion 51 has, for example, a vortex shape that winds outward from the center, and the outer end portion of the vortex shape extends sideways. Further, the impeller storage portion 51 has a hollow inside, and the impeller 5 is housed inside. An upper opening 61 opened in the vertical direction is formed in the impeller storage portion 51 and in the lower center of the impeller storage portion 51. The diameter of the upper opening 61 is equal to the outer diameter of the fitting portion 42 of the pipe portion 22. As the impeller 5 rotates, the impeller storage section 51 discharges the fluid flowing from the upper opening 61 into the impeller storage section 51 so as to follow the vortex shape.

(Upper joint 52)
The upper joint portion 52 is provided in the impeller storage portion 51 so as to surround the outer periphery of the upper opening 61 formed in the impeller storage portion 51. Further, the upper joint portion 52 has an upper fastening circular portion 62 and an upper fastening portion 63. The upper fastening circular portion 62 is a member that surrounds the outer circumference of the upper opening 61. The upper fastening portion 63 projects from the upper fastening circular portion 62 to the outside of the line pump 100. Eight upper fastening portions 63 are provided, for example, and each upper fastening portion 63 is formed at an interval of 45 °, and has the same diameter as the circle in which each lower fastening portion 44 is located. Located on the circumference. As a result, when the lower joint portion 23 and the upper joint portion 52 are joined, each of the lower fastening portions 44 is positioned so as to correspond to one of the upper fastening portions 63. Further, at this time, since the lower casing 11 and the upper casing 12 are rotatable, the upper fastening portion 63 corresponding to each lower fastening portion 44 is appropriately changed.

The upper fastening portions 63 may be formed at intervals of about a divisor of 360, such as 90 ° or 60 °, instead of the interval of 45 °. In this case, four upper fastening portions 63 are provided if the interval is 90 °, and six are provided if the interval is 60 °. Further, when one of the lower fastening portions 44 is in a position corresponding to one of the upper fastening portions 63, all the other lower fastening portions 44 are in the position of one of the upper fastening portions 63. The upper fastening portions 63 may not be provided at equal intervals as long as the shapes can be matched. Further, each upper fastening portion 63 is formed with an upper bolt hole 64 into which a bolt 46 is inserted extending in the vertical direction. The upper bolt hole 64 is formed with, for example, a female screw having a groove on the surface.

(Upper piping connection 53)
The upper pipe connecting portion 53 constitutes the side surface of the upper casing 12 and is connected to the end portion of the impeller housing portion 51 extending toward the side. The upper pipe connection portion 53 is a substantially circular member having a second connection port 65 formed therein and provided with legs for supporting the line pump 100, similarly to the lower pipe connection portion 21. Here, the angle formed by the first connection port 31 and the second connection port 65 is adjusted by changing the upper fastening portion 63 corresponding to each lower fastening portion 44 as described above. Is. A second pipe 302, which is a discharge pipe for discharging a fluid from the line pump 100, is connected to the upper pipe connection portion 53. As described above, when the first pipe 301 connected to the lower pipe connection portion 21 is not an introduction pipe but an discharge pipe, the second pipe 302 may be an introduction pipe instead of the discharge pipe. ..

Here, a method of joining the lower casing 11 and the upper casing 12 to manufacture the casing 1 will be described. First, the operator selects the upper fastening portion 63 corresponding to the lower fastening portion 44 so that the angle formed by the first connecting port 31 and the second connecting port 65 becomes a desired angle. Next, the operator aligns the lower fastening portion 44 with the selected upper fastening portion 63, and fits the fitting portion 42 of the lower casing 11 into the upper fastening circular portion 62 of the upper casing 12. As a result, the lower casing 11 and the upper casing 12 are joined in an inlay shape. Then, the operator inserts the bolt 46 from the lower bolt hole 45 of the lower fastening portion 44, and inserts the bolt 46 into the female screw formed in the upper bolt hole 64 of the upper fastening portion 63 in which the lower fastening portion 44 is aligned. Tighten. In this way, the operator can join the lower casing 11 and the upper casing 12 to manufacture the casing 1.

A female screw may be formed in the lower bolt hole 45, and an upper bolt hole 64 may be formed as a through hole. In this case, the operator inserts the bolt 46 from the upper bolt hole 64 and tightens the bolt 46 into the female screw formed in the lower bolt hole 45. Further, both the lower bolt hole 45 and the upper bolt hole 64 may be formed as through holes. In this case, the operator tightens the nut to the bolt 46 inserted from either the lower bolt hole 45 or the upper bolt hole 64. At this time, if the fitting portion 42 is provided with a sealing material, the space between the lower casing 11 and the upper casing 12 is sealed.

As shown in FIG. 2, the flange 2 is a flange-shaped member provided above the upper casing 12 and connecting the upper casing 12 and the frame 3. The frame 3 is provided above the upper casing 12 and supports the motor 4. The motor 4 is provided on the upper part of the frame 3 and is rotationally driven, and has a shaft 71. The impeller 5 is provided inside the impeller storage portion 51 of the upper casing 12 and is connected to the shaft 71 of the motor 4. The impeller 5 rotates when the motor 4 is driven, applies centrifugal force to the fluid in the impeller housing portion 51, and sends it to the upper pipe connecting portion 53 side.

Here, the operation of the line pump 100 will be described. First, the fluid flowing from the first pipe 301 flows from the first connection port 31 of the lower casing 11 to which the first pipe 301 is connected to the pipe portion 22. Next, the fluid flowing through the pipe portion 22 is pushed up by the impeller accommodating portion 51 of the upper casing 12. At this time, the impeller 5 provided in the impeller storage portion 51 of the upper casing 12 rotates to apply centrifugal force to the fluid in the impeller storage portion 51. Then, the fluid to which the centrifugal force is applied is sent to the upper pipe connection portion 53 side along the vortex shape of the impeller storage portion 51, and the angle formed with the first connection port 31 is adjusted. It is discharged from the connection port 65 of the above to the second pipe 302.

According to the first embodiment, the casing 1 includes a lower casing 11 having a first connection port 31 formed on a side surface to which a first pipe 301 through which a fluid flows is connected. Further, the casing 1 is rotatably provided on the upper surface of the lower casing 11, and the second connection port 65 to which the second pipe 302 through which the fluid flows is connected and the angle formed with the first connection port 31 is variable. Is provided with an upper casing 12 formed on the side surface. As a result, the line pump 100 can be applied even when the openings of the pipes connected to the line pump 100 do not face each other. Therefore, the installation location, the shape of the housing, and the like of the line pump 100 are not limited. Therefore, the degree of freedom in design can be improved.

Further, according to the first embodiment, the bolt 46 is inserted into the lower bolt hole 45 and any of the upper bolt holes 64 corresponding to the lower bolt holes 45, and the lower casing 11 and the upper casing 12 are fixed. Will be done. Therefore, the lower casing 11 and the upper casing 12 can be securely fixed in a state where the angle formed by the first connection port 31 and the second connection port 65 is adjusted.

Further, according to the first embodiment, the lower casing 11 and the upper casing 12 are joined in an inlay shape. As a result, when the lower casing 11 and the upper casing 12 are attached, the centers of the lower opening 32 and the upper opening 61 coincide with each other. Therefore, it is easy to align the lower casing 11 and the upper casing 12.

In addition, like the above-mentioned fitting portion 42, a sealing material may be provided between the lower casing 11 and the upper casing 12 to seal the space between the lower casing 11 and the upper casing 12. As a result, the space between the lower casing 11 and the upper casing 12 is more reliably sealed. Therefore, it is possible to prevent the fluid from leaking from the portion where the edge portion 41 and the upper opening 61 are fitted.

Further, when changing the capacity of the line pump 100, the amount of fluid introduced into the line pump 100 and the amount of fluid sent out by the impeller 5 need only be changed. Therefore, the impeller 5 and the first pipe Only the dimensions of the first connection port 31 to which the 301 is connected need to be changed. Therefore, when changing the capacity of the line pump 100, only the lower casing 11 on which the impeller 5 and the first connection port 31 are formed is changed, and the upper casing 12 does not need to be changed. That is, the upper casing 12 can be a common component even between line pumps having different capacities. On the other hand, in the prior art, when changing the capacity of the line pump, it was necessary to change the dimensions of the casing as a whole. On the other hand, the line pump of the first embodiment can be a common part even between line pumps having different capacities. Therefore, when preparing line pumps having different capacities, a casting type is used. Material consumption can be suppressed.

Embodiment 2.
FIG. 7 is a bottom view showing the upper casing 112 according to the second embodiment. As shown in FIG. 7, the second embodiment is different from the first embodiment in that the upper bolt hole 164 formed in the upper casing 112 is an elongated hole long in the circumferential direction. In the second embodiment, the same parts as those in the first embodiment are designated by the same reference numerals, the description thereof will be omitted, and the differences from the first embodiment will be mainly described.

The upper joint portion 52 of the first embodiment has an upper fastening portion 63 protruding outward from the upper fastening circle portion 62, whereas the upper joining portion 152 of the third embodiment has an upper fastening circle. It does not have an upper fastening portion that protrudes outward from the portion 162. Further, the upper fastening circular portion 162 is a circle having a longer radial direction than the upper fastening circular portion 62 of the first embodiment. The upper bolt hole 164 formed in the upper fastening circular portion 162 is an elongated hole that is long in the circumferential direction and has a shape along the circle.

According to the second embodiment, the upper bolt hole 164 is an elongated hole that is long in the circumferential direction and has a shape along a circle. As a result, in the upper bolt hole 164, the range corresponding to the lower bolt hole 45 formed in the lower casing 11 becomes larger. That is, the upper casing 112 and the lower casing 11 can rotate along the upper bolt hole 164 formed as an elongated hole even when the bolt 46 is fastened to the upper bolt hole 164 and the lower bolt hole 45. .. Thereby, the angle formed by the first connection port 31 and the second connection port 65 can be finely adjusted. That is, in the second embodiment, the connection direction between the pipes can be finely adjusted as compared with the first embodiment. Therefore, the degree of freedom in design can be further improved. In the second embodiment, the upper bolt hole 164 is an elongated hole, but the lower bolt hole 145 may be an elongated hole. In this case as well, the connection direction between the pipes can be finely adjusted as in the second embodiment. Therefore, the degree of freedom in design can be further improved.

Embodiment 3.
FIG. 8 is a cross-sectional view showing the line pump 300 according to the third embodiment. As shown in FIG. 8, the third embodiment is different from the first embodiment in that the upper casing 212 and the frame 203 are integrally formed. In the third embodiment, the same parts as those in the first embodiment are designated by the same reference numerals, the description thereof will be omitted, and the differences from the first embodiment will be mainly described.

The upper casing 212 of the third embodiment is integrally formed with the frame 203. Therefore, unlike the first embodiment, the upper casing 212 and the frame 203 do not need to be fastened with bolts via flanges. Therefore, in the third embodiment, the flange can be omitted.

According to the third embodiment, the flange is not provided on the line pump 300. Therefore, the height of the entire line pump 300 is lower than that of the first embodiment by the height of the flange. Therefore, the line pump 300 can be easily installed even when it is installed in a space where the height direction is limited.

Also, in general, the line pump can perform the designed operation by providing the impeller connected to the shaft of the motor at the specified position of the casing. For this reason, the motor must be properly positioned in order for the line pump to perform the designed operation. On the other hand, positioning of the motor is not easy because it is necessary to consider the positional relationship between the motor and the frame and the positional relationship between the frame and the casing. Here, in the line pump 300 of the third embodiment, the frame 203 is integrally formed with the casing 201. Therefore, when the motor 4 is attached, if it is connected to the frame 203 at the correct position, it is also connected to the casing 201 at the correct position. Therefore, the motor 4 can be positioned more easily.

1 Casing, 2 Flange, 3 Frame, 4 Motor, 5 Impeller, 11 Lower Casing, 12 Upper Casing, 21 Lower Piping Connection, 22 Pipe, 23 Lower Join, 24 Mounting Base, 31 First Connection, 32 Lower opening, 41 Edge, 42 Fitting, 43 Lower fastening circle, 44 Lower fastening, 45 Lower bolt hole, 46 bolt, 51 Impeller casing, 52 Upper casing, 53 Upper piping connection, 61 Upper Opening, 62 Upper fastening circle, 63 Upper fastening, 64 Upper bolt hole, 65 Second connection port, 71 shaft, 100 line pump, 112 Upper casing, 145 Lower bolt hole, 152 Upper joint, 162 Upper fastening circle Parts, 164 upper bolt holes, 201 casing, 203 frame, 212 upper casing, 300 line pump, 301 first pipe, 302 second pipe.

The casing according to the present invention has a lower casing in which a first connection port to which a first pipe through which a fluid flows is connected is formed on a side surface and a leg protruding downward is provided, and a lower casing is rotatably formed on the upper surface of the lower casing. With the upper casing provided, the second pipe through which the fluid flows is connected, the second connection port having a variable angle with the first connection port is formed on the side surface , and the leg protruding downward is provided. , Equipped with.

Claims (8)

A lower casing with a first connection port formed on the side to which the first pipe through which the fluid flows is connected,
A second pipe rotatably provided on the upper surface of the lower casing, to which the second pipe through which the fluid flows is connected, and a second connection port having a variable angle with the first connection port is formed on the side surface. A casing and a casing that comprises. The lower casing
Multiple lower bolt holes into which bolts are inserted are lined up on the same circumference and are formed so as to extend in the vertical direction.
The upper casing
A plurality of upper bolt holes into which the bolts are inserted are formed so as to extend in the vertical direction so as to be arranged on the same circumference having the same diameter as the circle in which the lower bolt holes are arranged.
The casing according to claim 1, wherein the bolt is inserted into each of the lower bolt holes and one of the upper bolt holes corresponding to the lower bolt holes, and the lower casing and the upper casing are fixed. .. Each of the lower bolt holes or the upper bolt holes
The casing according to claim 2, which is an elongated hole long in the circumferential direction. The lower casing and the upper casing
The casing according to any one of claims 1 to 3, which is joined in an inlay shape. Between the lower casing and the upper casing
The casing according to any one of claims 1 to 4, wherein a sealing material for sealing a space between the lower casing and the upper casing is provided. The casing according to any one of claims 1 to 5.
A motor provided on the upper part of the casing and driven to rotate,
A line pump including an impeller housed in the casing, connected to the motor, and rotated by the motor. A frame for connecting the motor and the casing is further provided.
The upper casing and the frame
The line pump according to claim 6, which is integrally formed. A lower casing having a first connection port formed on the side surface to which the first pipe through which the fluid flows is connected and a second pipe through which the fluid flows are rotatably provided on the upper surface of the lower casing. A method for manufacturing a casing in which a second connecting port is joined to an upper casing formed on a side surface.
In the upper casing, the circle and the diameter of the lower bolt holes are arranged so as to correspond to the respective lower bolt holes formed so as to be aligned on the same circumference and extend in the vertical direction. A step of selecting one of the upper bolt holes from a plurality of upper bolt holes formed so as to be aligned on the same circumference and extend in the vertical direction.
The step of fitting the lower casing into the upper casing,
A method of manufacturing a casing comprising a step of tightening a bolt using each of the lower bolt holes and the upper bolt holes selected so that the respective lower bolt holes correspond to each other.

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