Transfer Pump

Abstract

To provide a transfer pump capable of preventing vibration by reducing the number of parts and improving assembly workability. [Solution] In the transfer pump 10, a metal case arrangement part 85 is arranged in an outer pipe part 50, which restricts the movement of the outer pipe part 50 in the axial direction away from the motor 20 and the movement of the outer pipe part 50 in the direction around the axis, and which can position a metal case 110. The metal case 110 has a shape corresponding to the metal case arrangement part 85, and is arranged in the metal case arrangement part 85. A spring 102 is arranged between the housing 40 and the inner pipe 100 as a biasing member that biases the inner pipe 100 toward the metal case 110. The impeller 140 has a three-thread screw 142 as a helical blade part formed in a helical shape, and the helical blade part and the outer pipe part 50 are capable of being fluid lubricated.

Description

[Technical field]

[0001] The present invention relates to a transfer pump capable of transferring liquids, etc. [Background technology]

[0002] A conventional transfer pump has been developed previously by the present applicant, which comprises a housing, an outer pipe portion extending from the housing, an inner pipe extending from the housing and disposed inside the outer pipe portion, a metal case connecting the outer pipe portion and the inner pipe on the side facing away from the housing, a shaft connected to a motor and inserted through the inner pipe and supported by the metal case via metal, and an impeller attached to the side of the shaft opposite the motor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 64-34497 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned transfer pump, multiple metal pieces must be placed inside the inner pipe to prevent vibration, so it was desired to reduce the number of parts to prevent vibration. Also, since the holes in the outer pipe portion and the metal case are aligned and screwed together, the assembly work is time-consuming, so it was desired to improve the ease of assembly.

[0005] SUMMARY OF THE PRESENT DISCLOSURE In view of the above circumstances, an object of the present invention is to provide a transfer pump that can reduce the number of parts, prevent vibration, and improve assembly workability. [Means for solving the problem]

[0006] The device according to claim 1 comprises a housing; an outer pipe portion extending from the housing; an inner pipe extending from the housing and disposed inside the outer pipe portion; a metal case that connects the outer pipe portion and the inner pipe on a side away from the housing; a shaft connected to a motor, inserted through the inner pipe, and supported by the metal case via a metal; an impeller attached to the shaft opposite the motor; A transfer pump comprising: a metal case positioning portion is disposed in the outer pipe portion, the metal case positioning portion restricting movement of the outer pipe portion in an axial direction away from the motor and movement of the outer pipe portion in a direction around the axis and capable of positioning the metal case; The metal case has a shape corresponding to the metal case placement portion and is placed in the metal case placement portion, a biasing member is disposed between the housing and the inner pipe for biasing the inner pipe toward the metal case, The impeller includes a helical blade portion formed in a helical shape, The spiral blade portion and the outer pipe portion are capable of being fluid lubricated.

[0007] In the transfer pump having the above configuration, the metal case is disposed in the metal case placement section, which makes it easier to position the metal case and improves assembly workability. Furthermore, by enabling fluid lubrication between the spiral blade section and the outer pipe section, the amount of metal can be reduced while maintaining strength, and the impeller plays the role of the metal, suppressing vibration. Furthermore, the inner pipe is biased toward the metal case by the biasing member, which helps prevent vibration.

[0008] Therefore, by organically combining the above-mentioned configurations, the number of parts can be reduced, vibration can be prevented, and assembly workability can be improved. [Brief description of the drawings]

[0009] [Figure 1] 1 is a front view of a transfer pump according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a cross-sectional view of a transfer pump according to the embodiment. [Diagram 3] FIG. 4 is an enlarged cross-sectional view of the vicinity of a spring. [Figure 4] FIG. 2 is an enlarged cross-sectional view of the metal case and its surroundings. [Diagram 5] FIG. [Figure 6] 7. (a) is a cross-sectional view of the suction port member, and (b) is a view taken along line VIb in FIG. [Figure 7] FIG. 2A is a perspective view of the suction port member as viewed from above, and FIG. 2B is a perspective view of the suction port member as viewed from below. [Figure 8] FIG. [Figure 9] (a) is a perspective view of the metal case seen from below, and (b) is a perspective view of the metal case seen from above. [Figure 10] FIG. [Figure 11] FIG. 1A is a perspective view of the impeller as viewed from below, and FIG. [Figure 12] FIG. 4 is an explanatory perspective view showing the positional relationship in the vicinity of a metal case. [Figure 13] 13 is a cross-sectional view taken along line XIII-XIII in FIG. 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] An embodiment of the transfer pump of the present invention will be described with reference to the drawings. The transfer pump 10 in this embodiment is generally equipped with a motor 20, a motor casing 22, a housing 40, an outer pipe portion 50, an inner pipe 100, a metal case 110, a shaft 130, and an impeller 140, as shown in Figures 1 to 13, and is used to divide, replenish, transfer, etc., liquid foods.

[0011] The motor 20 is an existing electric motor, and is housed in a motor casing 22. The motor casing 22 is made of synthetic resin, and includes a handle 24 that can be held by hand, an operating switch 26, a power cord 28, and the like.

[0012] The motor casing 22 is connected to the housing 40 via a fastening nut 30. The housing 40 is made of metal (stainless steel) and has an insertion hole 42 formed along the axial direction, and the rotating shaft 21 of the motor 20 and the shaft 130 are connected inside using an existing joint 46, bearing 48, etc.

[0013] The housing 40 has an outwardly projecting flange portion 44 .

[0014] The lower end of the insertion hole 42 has a step portion 43 capable of receiving a spring 102, which will be described later.

[0015] In this embodiment, the outer pipe portion 50 is made up of a ferrule tee 60, an outer pipe 70, and a clamp 90.

[0016] The Ferrule tee 60 is an existing T-shaped tee, and has a vertical section 60a extending in the up-down direction and a discharge port section 60b extending in the horizontal direction. The vertical section 60a has flange sections 61, 62, and 63 that protrude outward from the top and bottom ends and at three locations on the free end side of the discharge port.

[0017] The outer pipe 70 is made of metal and formed into a cylindrical shape, and has a flange portion 71 that protrudes outward at its upper end and an intake port 72 at its lower end.

[0018] In this embodiment, the outer pipe 70 is formed by welding the upper end of an intake port member 80 to the lower end of a main body member 75 formed in a cylindrical shape, and they are integrated together.

[0019] The main body member 75 has the flange portion 71 described above.

[0020] As shown in Figures 6 and 7, the suction port member 80 is cylindrical and has a thicker tube thickness than the main body member 75. The inside of the upper part is provided with a tapered section 81 which is tapered in diameter and increases in diameter toward the top, and the upper end part has a tube thickness approximately the same as that of the main body member 75.

[0021] The tapered portion 81 is provided with a relief portion 82 which is cut into a crescent shape by end milling.

[0022] Four horizontal holes 83 penetrating in the pipe thickness direction are formed near the tapered portion 81 of the suction port member 80. The horizontal holes 83 communicate with the drainage hole 119 of the metal case 110 to facilitate the flow of drainage liquid.

[0023] The lower end of the suction port member 80 is formed with four cutout portions 84 .

[0024] A step surface 86 formed on the lower side of the relief portion 82 restricts movement of the metal case 110 toward the lower end side.

[0025] The relief portion 82 restricts movement of the metal case 110 in the direction around the axis of the outer pipe portion 50 .

[0026] From the above, the outer pipe section 50 is provided with a metal case positioning section 85 which restricts the axial movement of the outer pipe section 50 away from the motor 20 and the axial movement of the outer pipe section 50, and which is capable of positioning the metal case 110.

[0027] 5 etc., includes a pair of curved arms 91 pivotally supported by hinges 92, and a clamping tool 93 disposed on one of the curved arms 91. The clamp 90 clamps the parts to be connected with the curved arms 91 and fastens and connects them with the clamping tool 93.

[0028] The flange portion 44 of the housing 40 and the upper flange portion 61 of the ferrule tee 60 are connected via a ferrule gasket 64 and a clamp 90 (see FIG. 2).

[0029] The lower flange portion 62 of the ferrule tee 60 and the flange portion 71 of the main body member 75 are connected via a ferrule gasket 64 and a clamp 90 (see FIG. 2).

[0030] The inner pipe 100 is made of metal, formed into a cylindrical shape, and attached to the insertion hole 42 of the housing 40 so as to be slidable in the up-down direction (the axial direction of the housing 40).

[0031] A spring 102 serving as a biasing member is disposed between the step portion 43 of the housing 40 and the upper end surface of the inner pipe 100, and biases the inner pipe 100 downward (towards the metal case 110).

[0032] The metal case 110 is made of metal, and as shown in FIGS. 8, 9, etc., includes an insertion hole 111, an insertion portion 115 into which the inner pipe 100 is inserted, and a positioning portion .

[0033] The insertion hole 111 has a large inner diameter portion 112 , a medium inner diameter portion 113 formed to have a smaller diameter than the large inner diameter portion 112 , and a small inner diameter portion 114 formed to have a smaller diameter than the medium inner diameter portion 113 .

[0034] The insertion portion 115 is formed in a cylindrical shape, and is capable of receiving the lower end surface of the inner pipe 100 at a step surface portion between the large inner diameter portion 112 and the medium inner diameter portion 113 .

[0035] The positioning portion 116 has an outer shape resembling a cross pillar and includes a high step portion 117 that protrudes radially outward, and a low step portion 118 that protrudes lower than the high step portion 117.

[0036] The lower surface of the high step portion 117 abuts against the step surface 86 of the outer pipe portion 50, restricting downward movement (in the axial direction of the outer pipe portion 50), and the circumferential surface of the high step portion 117 abuts against the relief portion 82 of the outer pipe portion 50, restricting movement in the rotational direction (around the axis of the outer pipe portion 50).

[0037] A liquid drain hole 119 is formed from the lower step portion 118 toward the insertion hole 111 and inclined with respect to the axis of the outer pipe portion 50 .

[0038] The metal case 110 has a shape corresponding to the metal case arrangement portion 85, and is arranged in the metal case arrangement portion 85. The lower end of the inner pipe 100 is inserted into an insertion portion 115 of the metal case 110, and the outer pipe portion 50 and the inner pipe 100 are connected by the metal case 110 on the lower side (the side away from the housing 40).

[0039] Since the inner pipe 100 is biased toward the metal case 110 by the spring 102 serving as a biasing member, the connection between the inner pipe 100 and the metal case 110 is strengthened.

[0040] As described above, the shaft 130 is connected to the rotating shaft 21 of the motor 20 by using the existing joint 46, bearing 48, etc. The shaft 130 passes through the inner pipe 100 and the metal case 110, and is supported rotatably with respect to the insertion hole 111 of the metal case 110 via the metal 132.

[0041] An impeller 140 is attached to the lower end of the shaft 130.

[0042] The impeller 140 has a mounting hole 141 formed penetrating in the axial direction. A pin groove 143 is formed in the mounting hole 141. In this embodiment, a pin 135 is inserted into the pin groove 143 and the pin groove 134 formed in the shaft 130, thereby preventing the impeller 140 from rotating.

[0043] The impeller 140 has an outer circumferential surface formed with a triple-start screw 142 as a helical blade portion.

[0044] The outer surface of the triple-start screw 142 and the inner surface of the suction port member 80 that constitutes the outer pipe 70 are capable of being fluid lubricated.

[0045] From the above, the spiral blade portion and the outer pipe portion 50 can be fluid lubricated.

[0046] The following describes how the transfer pump 10 is used. The suction port 72 of the outer pipe portion 50 is inserted into an 18 L can (18L can), a bag-in-box (a 20 L cardboard plastic container), or the like, and the liquid is transferred to a desired container, etc.

[0047] After transportation, the clamp 90 can be released, and the housing 40, the ferrule tee 60, and the outer pipe 70 can be disassembled and cleaned.

[0048] The transfer pump 10 having the above configuration includes a housing 40 and An outer pipe portion 50 extending from the housing 40; an inner pipe 100 extending from the housing 40 and disposed inside the outer pipe portion 50; a metal case 110 that connects the outer pipe portion 50 and the inner pipe 100 on the side away from the housing 40; a shaft 130 connected to the motor 20, inserted through the inner pipe 100, and supported by the metal case 110 via a metal 132; an impeller 140 attached to the shaft 130 on the opposite side to the motor 20; A transfer pump comprising: A metal case arrangement portion 85 is disposed in the outer pipe portion 50, the metal case arrangement portion 85 restricting movement of the outer pipe portion 50 in the axial direction away from the motor 20 and in the axial direction of the outer pipe portion 50 and capable of positioning the metal case 110. The metal case 110 is shaped to correspond to the metal case placement portion 85 and is placed in the metal case placement portion 85. A spring 102 is disposed between the housing 40 and the inner pipe 100 as a biasing member for biasing the inner pipe 100 toward the metal case 110. The impeller 140 includes a triple-start screw 142 as a helical blade portion formed in a helical shape. The spiral blade portion and the outer pipe portion 50 are capable of being fluid lubricated.

[0049] In the transfer pump 10 configured as described above, by disposing the metal case 110 in the metal case disposing portion 85, the positioning of the metal case 110 is easy, and the workability of assembly can be improved. Furthermore, by allowing the spiral blade portion and the outer pipe portion 50 to be fluid lubricated, the number of metals 132 can be reduced while maintaining strength, and the impeller 140 plays the role of the metal 132, suppressing vibration. Furthermore, by using a biasing member to bias the inner pipe 100 toward the metal case 110, vibration prevention is supported.

[0050] Therefore, by organically combining the above-mentioned configurations, the number of parts can be reduced, vibration can be prevented, and assembly workability can be improved.

[0051] The transfer pump of the present invention is not limited to the above-mentioned configuration. In other words, various design modifications are possible without departing from the gist of the present invention. The following are examples of modified embodiments.

[0052] For example, it may be equipped with a battery to provide a cordless transfer pump. [Explanation of symbols]

[0053] 10. Transfer pump 20 Motor 40 Housing 50 Outer pipe section 85 Metal case placement section 100 Inner pipe 102 Spring 110 Metal Case 130 Shaft 132 Metal 140 Impeller 142 3-thread screw

Claims

[Claim 1] Housing and an outer pipe portion extending from the housing; an inner pipe extending from the housing and disposed inside the outer pipe portion; a metal case that connects the outer pipe portion and the inner pipe on a side away from the housing; a shaft connected to a motor, inserted through the inner pipe, and supported by the metal case via a metal; an impeller attached to the shaft opposite the motor; A transfer pump comprising: a metal case positioning portion is disposed in the outer pipe portion, the metal case positioning portion restricting movement of the outer pipe portion in an axial direction away from the motor and movement of the outer pipe portion in a direction around the axis and capable of positioning the metal case; The metal case has a shape corresponding to the metal case placement portion and is placed in the metal case placement portion, a biasing member is disposed between the housing and the inner pipe for biasing the inner pipe toward the metal case, The impeller includes a helical blade portion formed in a helical shape, A transfer pump, characterized in that the spiral blade portion and the outer pipe portion are capable of being fluid lubricated.

Images