HOUSING, LINE PUMP AND METHOD FOR MAKING A HOUSING

Abstract

A housing according to the present disclosure comprises a lower housing formed with a first connection port on one side of the lower housing, wherein the first connection port is connectable to a first tube through which a fluid flows, and an upper housing rotatably provided on a top side of the lower housing, wherein the upper housing is formed with a second connection port on one side of the upper housing, wherein the second connection port is connectable to a second tube through which the fluid flows, the second connection port forming a variable angle with the first connection port.

Description

Technical field

[0001] The present invention relates to a housing to be attached to pipes, a line pump including the housing, and a method for manufacturing the housing. Technological background

[0002] A related type of line pump is known to be installed somewhere along a pipe within the housing of an air conditioning system, underfloor heating system, or other installation. This line pump comprises a rotating impeller or turbine, driven by a motor, and a housing in which the turbine is located. The housing has a suction port and an outlet port positioned opposite each other with respect to the center of the housing. This means that the suction port and the outlet port are located on the centerline that passes through the center of the plane in which the turbine rotates within the housing.

[0003] A housing of this type, as described above, is disclosed in patent reference 1. This housing contains a spiral along which a fluid flows towards the outlet, and an outlet section is designed such that it is offset from the center line in the direction of rotation of the impeller. The outlet section represents a starting point from which the spiral begins to wind up. Furthermore, the housing disclosed in patent reference 1 is designed such that the angle formed between the center line and the line tangent to the pointed end of the outlet section is less than or equal to 90°. Patent reference 1 aims to improve formability by omitting a portion of the housing from which a cast article cannot be smoothly removed from two molds. List of citations from patent literature

[0004] Patent literature 1: Unexamined Japanese patent application with publication no. JP H07 - 208 397 A Summary of the invention: Technical problem

[0005] However, in the housing of a line pump disclosed in patent literature 1, the suction port and the outlet port are located on a center line of the housing. This means that the line pump in patent literature 1 is only applicable to housings where the openings of the pipes connected to the line pump face each other. Given this, it is difficult to install the line pump disclosed in patent literature 1, for example, in a corner of the housing or in a location where a device is close to the line pump. Avoiding such installations, as described above, results in an increase in the pipe length. This makes it difficult to reduce the size of the housing. Therefore, it is possible that the design flexibility could be reduced.

[0006] The present invention was made to solve the above-mentioned problems, and it is an object of the present invention to provide a housing that improves design flexibility, a line pump and a method for manufacturing the housing. Solution to the problem

[0007] A housing according to an embodiment of the present disclosure comprises: a lower housing formed with a first connection port on one side of the lower housing, wherein the first connection port is connected to a first tube through which a fluid flows; and an upper housing rotatably provided on a top side of the lower housing, wherein the upper housing is formed with a second connection port on one side of the upper housing, wherein the second connection port is connected to a second tube through which the fluid flows, the second connection port forming a variable angle with the first connection port. Advantageous effects of the invention

[0008] According to one embodiment of the present disclosure, since the first and second connection ports form a variable angle, the housing is also applicable in cases where the opening connections of pipes to be connected to a line pump do not face each other. Thus, the line pump is not limited to being installed in a specific location, having a particular housing shape, or other specific conditions. Therefore, design flexibility can be improved. Brief description of the drawings [ Fig. 1] Fig. Figure 1 shows a perspective view illustrating a line pump 100 according to embodiment 1. [ Fig. 2] Fig. Figure 2 shows a cross-sectional view illustrating the line pump 100 according to embodiment 1. [ Fig. 3] Fig. Figure 3 shows a top view illustrating a lower housing 11 according to embodiment 1. [ Fig. 4] Fig. Figure 4 shows a side view illustrating the lower housing 11 according to embodiment 1. [ Fig. 5] Fig. Figure 5 shows a bottom view illustrating an upper housing 12 according to embodiment 1. [ Fig. 6] Fig. Figure 6 shows a side view illustrating the upper housing 12 according to embodiment 1. [ Fig. 7] Fig. Figure 7 shows a bottom view illustrating an upper housing 112 according to embodiment 2. [ Fig. 8] Fig. Figure 8 shows a cross-sectional view illustrating a line pump 300 according to embodiment 3. Description of the embodiments: Embodiment 1

[0009] A housing 1 of a line pump 100 according to an embodiment 1 will be described below with reference to the drawings. Fig. Figure 1 shows a perspective view illustrating the line pump 100 according to embodiment 1. Fig. Figure 2 shows a cross-sectional view illustrating the line pump 100 according to embodiment 1. As shown in the Fig. 1 and Fig. As illustrated in Figure 2, the line pump 100 comprises the housing 1, a flange 2, a frame 3, a motor 4 and an impeller 5. (Housing 1)

[0010] Housing 1 is hollow. A fluid flows within housing 1. Housing 1 comprises a lower housing 11 and an upper housing 12. The lower housing 11 forms the lower part of housing 1. The upper housing 12 forms the upper part of housing 1. (Lower case 11)

[0011] Fig. Figure 3 shows a top view illustrating the lower housing 11 according to embodiment 1. Fig. Figure 4 shows a side view illustrating the lower housing 11 according to embodiment 1. As shown in the Fig. 3 and Fig. As illustrated in Figure 4, the lower housing 11 comprises a lower pipe connection section 21, a pipe section 22, a lower connection section 23 and a bracket 24. (Lower pipe connection section 21)

[0012] The lower pipe connection section 21 is an essentially circular part that forms the side of the lower housing 11 and is provided with legs that support the line pump 100. The lower pipe connection section 21 is designed with a first connection port 31, which has an opening. The lower pipe connection section 21 connects to an opening port of a first pipe 301, which is an inlet pipe through which a fluid is introduced into the line pump 100. It should be noted that the first pipe 301 could not be the inlet pipe, but could be an outlet pipe through which a fluid is discharged from the line pump 100. (Pipe section 22)

[0013] The pipe section 22 has a hollow, tubular shape. At one end, the pipe section 22 is connected to the lower pipe connection section 21. A fluid introduced from the first connection port 31 flows into the pipe section 22. The pipe section 22 has a shape that extends obliquely downwards from one end of the pipe section 22, where it is connected to the lower pipe connection section 21, and then extends almost horizontally. At another end of the pipe section 22, and at its upper midpoint, a lower opening port 32 is formed, opening in the vertical direction. (Lower connecting section 23)

[0014] The lower connecting section 23 is provided on the pipe section 22 such that the lower connecting section 23 surrounds the lower opening connection 32 formed on the pipe section 22. The lower connecting section 23 comprises a circumferential edge section 41, a fitting section 42, a lower mounting circle section 43, and lower mounting sections 44. The circumferential edge section 41 is a part that surrounds the outer circumference of the lower opening connection 32 and is formed at a height higher than the fitting section 42 and the lower mounting circle section 43. The fitting section 42 is a part that surrounds the outer circumference of the circumferential edge section 41 and is formed at a height higher than the lower mounting circle section 43. It should be noted that the fitting section 42 could be provided with a sealing material. For example, the sealing material is a gasket or an O-ring.Assuming the sealing material is circular, its inner diameter is equal to the outer diameter of the circumferential edge section 41. The lower mounting circular section 43 is a part that surrounds the outer circumference of the fitting section 42. As described above, the lower connecting section 23 has three height levels and is designed such that the height decreases in steps from the center.

[0015] Each of the lower mounting sections 44 is a portion that projects outwards from the lower mounting section 43 relative to the line pump 100. For example, three lower mounting sections 44 are provided. One of the lower mounting sections 44 is positioned opposite one end of the pipe section 22. The other two lower mounting sections 44 are positioned at 90° angles to the first lower mounting section 44 in different directions. The lower mounting sections 44 are positioned on the same circumference. It should be noted that there could be two lower mounting sections 44, or four or more lower mounting sections 44. Each of the lower mounting sections 44 is formed with a lower bolt hole 45 extending in the vertical direction. A bolt 46 is inserted into the lower bolt hole 45.For example, the lower bolt hole 45 is a through hole through which the bolt 46 is inserted and passes. (Bracket 24)

[0016] The bracket 24 provides a seat at the bottom of the pipe section 22 and is positioned at the lowest section of the line pump 100 for placement on the ground or in other locations. The bracket 24 stabilizes the center of gravity of the line pump 100. This prevents the line pump 100 from tipping over during installation or assembly. (Upper case 12)

[0017] Fig. Figure 5 shows a bottom view illustrating the upper housing 12 according to embodiment 1. Fig. Figure 6 shows a side view illustrating the upper housing 12 according to embodiment 1. As shown in the Fig. 5 and Fig. As illustrated in Figure 6, the upper housing 12 comprises a vane bearing section 51, an upper joint or connecting section 52 and an upper pipe connecting section 53. (Impeller bearing section 51)

[0018] The impeller bearing section 51, for example, has a spiral shape that coils from the center to the outer side. The outer end of the spiral shape extends laterally. The impeller bearing section 51 has a hollow interior in which the impeller 5 is mounted. An upper opening 61 is formed in the center of the bottom of the impeller bearing section 51 and opens vertically. The upper opening 61 has a diameter equal to the outer diameter of the fitting section 42 of the pipe section 22. The impeller 5 rotates within the impeller bearing section 51 such that a fluid flowing into the impeller bearing section 51 from the upper opening 61 flows along the spiral shape and is discharged. (Upper connecting section 52)

[0019] The upper connecting section 52 is provided in the impeller bearing section 51 such that the upper connecting section 52 surrounds the outer circumference of the upper opening connection 61 formed in the impeller bearing section 51. The upper connecting section 52 comprises an upper mounting circle section 62 and upper mounting sections 63. The upper mounting circle section 62 is a part that surrounds the outer circumference of the upper opening connection 61. The upper mounting sections 63 project outwards from the upper mounting circle section 62 relative to the line pump 100. For example, eight upper mounting sections 63 are provided. The upper mounting sections 63 are designed to be spaced apart from each other at an angle of 45° and are positioned on the same circumference with a diameter equal to that of the circle on which the lower mounting sections 44 are positioned.With this positioning, when the lower connecting section 23 and the upper connecting section 52 are connected to each other, each of the lower mounting sections 44 is positioned in accordance with any one of the upper mounting sections 63. In this case, since the lower housing 11 and the upper housing 12 are rotatable, each of the lower mounting sections 44 is brought into suitable alignment with another of the upper mounting sections 63.

[0020] It can be stated that the upper mounting sections 63 could be designed to be spaced apart from each other at an angle other than 45°, for example at 90°, 60° or any fraction of 360°. In such a case, four upper mounting sections 63 are provided if the upper mounting sections 63 are spaced apart from each other at an angle other than 90°, or six upper mounting sections 63 are provided if the upper mounting sections 63 are spaced apart from each other at an angle of 60°.Furthermore, if one of the lower fastening sections 44 is in a position corresponding to one of the upper fastening sections 63, and each of the remaining lower fastening sections 44 can be aligned with the position of any of the upper fastening sections 63, then the upper fastening sections 63 might not be equidistant from each other. Each of the upper fastening sections 63 is formed with an upper bolt hole 64 extending in the vertical direction. The bolt 46 is inserted into the upper bolt hole 64. For example, the upper bolt hole 64 is formed with an internal thread in the upper portion of the upper bolt hole 64. (Upper pipe connection section 53)

[0021] The upper pipe connection section 53 forms the side of the upper housing 12 and is connected to the end section of the impeller bearing section 51, which extends laterally. The upper pipe connection section 53 is provided with a second connection port 65 with an opening. Similar to the lower pipe connection section 21, the upper pipe connection section 53 is an essentially circular part provided with legs that support the line pump 100. The angle formed between the first connection port 31 and the second connection port 65 is adjusted in the manner described above by modifying the upper mounting sections 63, which are to be aligned with the lower mounting sections 44. The upper pipe connection section 53 connects to a second pipe 302, which is an outlet pipe through which fluid is discharged from the line pump 100.It should be noted that, contrary to the description given above, if the first pipe 301 to be connected to the lower pipe connection section 21 is not an inlet pipe but an outlet pipe, then the second pipe 302 could be an inlet pipe instead of an outlet pipe.

[0022] A method for manufacturing the housing 1 by connecting the lower housing 11 to the upper housing 12 is now described. First, a worker selects several of the upper mounting sections 63 corresponding to the lower mounting sections 44 such that the first connecting port 31 and the second connecting port 65 form a desired angle. Next, the worker aligns the lower mounting sections 44 with the positions of the corresponding selected upper mounting sections 63 and then fits the fitting section 42 of the lower housing 11 into the upper mounting circular section 62 of the upper housing 12. This fitting connects the lower housing 11 and the upper housing 12 in the form of a push-fit connection. The worker then inserts the bolt 46 from the lower bolt hole 45 of each of the lower mounting sections 44 and tightens the bolt 46 in the thread. on the inside of the upper bolt hole 64 of the upper fastening section 63, which is aligned with the position of the lower fastening section 44. In this way, the worker connects the lower housing 11 to the upper housing 12 and can thereby manufacture the housing 1.

[0023] It can be observed that the lower bolt hole 45 could be formed with an internal thread, while the upper bolt hole 64 could be designed to serve as a through hole. In this case, a worker inserts the bolt 46 into the upper bolt hole 64 and then tightens the bolt 46 in the thread formed on the inside of the lower bolt hole 45. Furthermore, both the lower bolt hole 45 and the upper bolt hole 64 could be designed to serve as through holes. In this case, a worker tightens a nut onto the bolt 46, which is inserted from either the lower bolt hole 45 or the upper bolt hole 64. It can be observed that at this time, the space between the lower housing 11 and the upper housing 12 is tightly sealed if the fitting section 42 is filled with a sealing material.

[0024] As in Fig. As illustrated in Figure 2, the flange 2 is a flanged section provided on the top of the upper housing 12, connecting the upper housing 12 to the frame 3. The frame 3 is positioned above the upper housing 12 to support the motor 4. The motor 4 is located in the upper section of the frame 3, is driven by a rotating shaft, and comprises a shaft 71. The impeller 5 is located in the impeller bearing section 51 of the upper housing 12 and is connected to the shaft 71 of the motor 4. The impeller 5 is rotated by the drive of the motor 4 and exerts a centrifugal force on a fluid in the impeller bearing section 51 to deliver the fluid towards the upper pipe connection section 53.

[0025] The operation of the line pump 100 will now be described. First, fluid flowing from the first pipe 301 flows to pipe section 22 through the first connecting port 31 of the lower housing 11, which is connected to the first pipe 301. Next, the fluid flowing to pipe section 22 is forced upwards into the impeller bearing section 51 of the upper housing 12. At this point, the impeller 5, which is located in the impeller bearing section 51 of the upper housing 12, rotates to exert a centrifugal force on the fluid in the impeller bearing section 51.The fluid, which is subjected to centrifugal force, is then delivered in the direction of the upper pipe connection section 53 such that the fluid flows along the worm shape of the impeller bearing section 51, and is then discharged from the second pipe 302 from the second connection port 65, which forms an angle with the first connection port 31, the angle having already been set.

[0026] According to embodiment 1, the housing 1 comprises the lower housing 11, which is formed with the first connection port 31 on the side of the lower housing 11. The first connection port 31 is connected to the first pipe 301 through which a fluid flows. The housing 1 further comprises the upper housing 12, which is rotatably mounted on the top of the lower housing 11. The upper housing 12 is formed with the second connection port 65 on the side of the upper housing 12. The second connection port 65 is connected to the second pipe 302 through which a fluid flows and forms a variable angle with the first connection port 31. Due to this configuration, the line pump 100 is also applicable in cases where the opening ports of the pipes connected to the line pump 100 do not face each other.Therefore, the 100 line pump is not limited to being installed in a specific location, having a particular housing shape or design, or to other special conditions. This allows for improved design flexibility.

[0027] According to embodiment 1, the lower housing 11 and the upper housing 12 are fixed to one another by inserting the bolt 46 into each of the lower bolt holes 45 and into any one of the upper bolt holes 64 corresponding to each of the lower bolt holes 45. Therefore, the lower housing 11 and the upper housing 12 can be fixed tightly to one another in a state in which the angle formed between the first connecting port 31 and the second connecting port 65 has already been set.

[0028] Furthermore, according to embodiment 1, the lower housing 11 and the upper housing 12 are connected to each other by means of a pipe connection. This connection aligns the center of the lower opening 32 and the center of the upper opening 61 when the lower housing 11 and the upper housing 12 are attached to each other. Therefore, the shaft alignment between the lower housing 11 and the upper housing 12 is simplified.

[0029] It can be noted that, as described for the fitting section 42, a sealing material could be provided between the lower housing 11 and the upper housing 12 to tightly seal the space between them. This sealing material provides a more reliable and tight seal for the space between the lower housing 11 and the upper housing 12. Therefore, it prevents fluid from leaking from the area where the circumferential edge section 41 is fitted into the upper opening port 61.

[0030] The capacity of the line pump 100 can be changed simply by altering the amount of fluid introduced into the line pump 100 and the amount of fluid delivered to the impeller 5. Therefore, only the dimensions of the impeller 5 and the first connection port 31, which is connected to the first pipe 301, need to be changed. Accordingly, the capacity of the line pump 100 is changed by simply replacing the impeller 5 and the lower housing 11, which is formed with the first connection port 31. It is not necessary to replace the upper housing 12. This means that the upper housing 12 can be used as a universal part between line pumps with different capacities. In the conventional method, it is necessary to change the dimensions of the entire housing when changing the capacity of the line pump.In contrast to the prior art method, the line pump of embodiment 1 can be used as a common component between line pumps with different capacities. Thus, in cases where line pumps with different capacities are prepared, the consumption of materials for the molds can be reduced. Design 2

[0031] Fig. Figure 7 shows a bottom view illustrating an upper housing 112 according to embodiment 2. As in Fig. As illustrated in Figure 7, embodiment 2 differs from embodiment 1 in that the upper bolt holes 164, which are formed in an upper housing 112, are longitudinal holes extending in a circumferential direction. In embodiment 2, identical parts to those in embodiment 1 are designated by the same reference numerals, and therefore their descriptions are omitted. The main differences compared to embodiment 1 are described below.

[0032] In embodiment 1, the upper connecting section 52 comprises the upper mounting sections 63, which project outwards from the upper mounting circle section 62. In contrast, in embodiment 2, an upper connecting section 152 does not include an upper mounting section projecting outwards from an upper mounting circle section 162. The upper mounting circle section 162 has a circular shape with a larger radial dimension than that of the upper mounting circle section 62 in embodiment 1. The upper bolt holes 164 formed on the upper mounting circle section 162 are elongated holes, each of which has a shape that is elongated in the circumferential direction and extends along the circle.

[0033] According to embodiment 2, the upper bolt holes 164 are elongated holes, each having a shape that is elongated in the circumferential direction and extends along the circle. In this structure, the upper bolt holes 164 have a larger acceptable area for the lower bolt holes 45 formed in the lower housing 11. This means that even when the bolt 46 is tightened in the upper bolt hole 164 and the lower bolt hole 45, the upper housing 112 and the lower housing 11 can still rotate along the upper bolt hole 164, which is formed in an elongated shape. Because of this structure, the angle formed between the first connecting port 31 and the second connecting port 65 can be finely adjusted. This means that embodiment 2 allows for finer adjustment of the direction in which the tubes are connected compared to embodiment 1.Therefore, the design flexibility can be further improved. It should be noted that in embodiment 2, the upper bolt holes are 164 elongated holes; however, the lower bolt holes could instead be 145 elongated holes. This allows for a finer adjustment of the direction in which the pipes are to be connected, similar to embodiment 2. Therefore, the design flexibility can be further improved. embodiment 3

[0034] Fig. Figure 8 shows a cross-sectional view illustrating a line pump 300 according to embodiment 3. As in Fig.As illustrated in Figure 8, embodiment 3 differs from embodiment 1 in that an upper housing 212 and a frame 203 are formed integrally. In embodiment 3, identical parts to those in embodiment 1 are designated by the same reference numerals, and their descriptions are therefore omitted. The main differences compared to embodiment 1 are described below.

[0035] In embodiment 3, the upper housing 212 is formed integrally with the frame 203. Therefore, unlike in embodiment 1, the upper housing 212 and the frame 203 do not need to be fastened together with a bolt via a flange. Consequently, a flange can be omitted in embodiment 3.

[0036] According to embodiment 3, the line pump 300 is not provided with a flange. Accordingly, the overall height of the line pump 300 is reduced by the height of the flange compared to embodiment 1. Therefore, the line pump 300 can be easily installed, even in rooms with limited headroom.

[0037] In general, in a line pump, the impeller connected to the motor shaft is positioned in a predetermined location within the housing to ensure proper operation. Therefore, the motor must be positioned accurately for the line pump to operate as intended. However, positioning the motor is not straightforward, as it requires considering the relative positions of the motor and the frame, as well as the relative positions of the frame and the housing. In the line pump 300 of embodiment 3, the frame 203 is integrally formed with the housing 201. In this configuration, once the motor 4 is correctly connected to the frame 203 during assembly, it is also correctly connected to the housing 201. This simplifies the positioning of the motor 4. Reference symbol list

[0038] 1: Housing, 2: Flange, 3: Frame, 4: Motor, 5: Impeller, 11: Lower housing, 12: Upper housing, 21: Lower pipe connection section, 22: Pipe section, 23: Lower connection section, 24: Bracket, 31: First connection port, 32: Lower opening port, 41: Circumferential edge section, 42: Fitting section, 43: Lower mounting circle section, 44: Lower mounting section, 45: Lower bolt hole, 46: Bolt, 51: Impeller bearing section, 52: Upper connection section, 53: Upper pipe connection section, 61: Upper opening port, 62: Upper mounting circle section, 63: Upper mounting section, 64: Upper bolt hole, 65: Second connection port, 71: Shaft, 100: Line pump, 112: Upper housing 145: lower bolt hole, 152: upper connecting section, 162: upper mounting circle section, 164: upper bolt hole, 201: housing, 203: frame, 212: upper housing, 300: line pump, 301: first pipe, 302: second pipe

Claims

[1] Housing (1, 201) which features: a lower housing (11) which is provided with downwardly projecting legs and which is formed with a first connecting port (31) on one side of the lower housing (11), wherein the first connecting port (31) is connectable to a first tube (301) through which a fluid flows; and an upper housing (12, 112, 212) which is provided with downwardly projecting legs and which is rotatably provided on a top side of the lower housing (11), wherein the upper housing is formed with a second connecting port (65) on one side of the upper housing (12, 112, 212), wherein the second connecting port (65) is connectable to a second tube (302) through which the fluid flows, wherein the second connecting port (65) forms a variable angle with the first connecting port (31). [2] Housing (1, 201) according to claim 1, wherein in the lower housing (11) a plurality of lower bolt holes (45, 145) are formed, into each of which a bolt (46) is inserted, wherein the plurality of lower bolt holes (45, 145) are arranged on the same circumference and extend in a vertical direction, in the upper housing (12, 112, 212) a plurality of upper bolt holes (64, 164) are formed, into each of which the bolt (46) is inserted, wherein the plurality of upper bolt holes (64, 164) are arranged on a uniform circumference with a diameter equal to that of a circle on which the plurality of lower bolt holes (45, 145) are arranged, wherein the plurality of upper bolt holes (64, 164) extend in a vertical direction, and the lower housing (11) and the upper housing (12, 112, 212) are fixed to each other by inserting the bolt (46) into each of the plurality of lower bolt holes (45, 145) and any of the plurality of upper bolt holes (64, 164) corresponding to each of the plurality of lower bolt holes (45, 145). [3] Housing (1,201) according to claim 2, wherein each of the plurality of lower bolt holes (45, 145) or of the plurality of upper bolt holes (64,164) is an elongated hole extending in a circumferential direction. [4] Housing (1,201) according to one of claims 1 to 3, wherein the lower housing (11) and the upper housing (12, 112, 212) are connected to each other in the form of a pipe push-fit connection. [5] Housing (1,201) according to any one of claims 1 to 4, wherein a sealing material is provided between the lower housing (11) and the upper housing (12, 112,212) to tightly seal a space between the lower housing (11) and the upper housing (12, 112, 212). [6] Housing (1,201) according to any one of claims 1 to 5, wherein the lower housing (11) has a pipe section (22) extending laterally, and having a lower pipe connection section (21) which is connected to the pipe section (22) and which is formed with the first connection port (31), and wherein the upper housing (12, 112, 212) has a vane bearing section (51) which extends to the side and which has an inner section in which the vane (5) is mounted, and the lower pipe connection section (21) is provided with the legs of the lower housing (11), and the upper pipe connection section (53) is provided with the legs of the upper housing (12, 112, 212). [7] Line pump (100, 300) which has: a housing (1, 201) according to one of claims 1 to 6; a motor (4) which is provided above the housing (1,201), wherein the motor (4) is arranged to be driven in a rotating manner; and a vane wheel (5) which is housed in the casing (1, 201) which is connected to the motor (4) and which is arranged to be rotated by the motor (4). [8] Line pump (100, 300) according to claim 7, which further comprises a frame (3, 203) configured to connect the motor (4) and the housing (1, 201), wherein the upper housing (12, 112, 212) and the frame (3, 203) are formed integrally. [9] Method for manufacturing a housing (1, 201) by connecting a lower housing (11) having downwardly projecting legs and having a first connecting port (31) on one side of the lower housing (11), wherein the first connecting port (31) is connectable to a first tube (301) through which a fluid flows, and an upper housing (12, 112, 212) having downwardly projecting legs and rotatably mounted on a top side of the lower housing (11), wherein the upper housing (12, 112, 212) has a second connecting port (65) on one side of the upper housing (12, 112, 212), wherein the second connecting port (65) is connectable to a second tube (302) through which the fluid flows, the method comprising the steps: Selecting from a plurality of upper bolt holes (64, 164) formed in the upper housing (12, 112, 212) any one of the plurality of upper bolt holes (64, 164) corresponding to any one of lower bolt holes (45, 145) formed in the lower housing (11), wherein the lower bolt holes (45, 145) are arranged on an equal circumference and extend in a vertical direction, wherein the plurality of upper bolt holes (64, 164) are arranged on an equal circumference with a diameter equal to that of a circle on which the lower bolt holes (45, 145) are arranged, wherein the plurality of upper bolt holes (64, 164) extend in a vertical direction; Installing the lower housing (11) into the upper housing (12, 112, 212); and Tightening a bolt (46) by using each of the lower bolt holes (45, 145) and any selected one of the plurality of upper bolt holes (64, 164), corresponding to each of the lower bolt holes (45, 145).

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