TW201537027A - Discharge casing and vertical submersible pump provided with the same - Google Patents

Abstract

It is an object of the present invention to provide a vertical submersible pump capable of properly releasing air from an internal space of a pump body when a water level is recovered. A discharge casing (9) is used in the vertical submersible pump. The discharge casing (9) includes a joining thread portion (18b) formed in at least a part of an outer surface of the discharge casing (9). The joining thread portion (18b) is configured to be threadedly engaged with a female thread portion formed in an inner surface of an outer casing (24). At least one air releasing groove (25) that cuts across a thread of the joining thread portion (18b) is formed in the joining thread portion (18b).

Description

Spit out sleeve and upright type water pump with the discharge sleeve

The present invention relates to an upright type water pump, and more particularly to an upright type water pump that sinks in water in order to attract well water or the like.

According to the third figure, a general deep well pumping device using an upright type water pump is explained. This third figure is a diagram in which the upright type water pump 107 is placed in the well and the ground is represented as a section. Well water 103 at a specific water level exists in the well. Then, in the well water 103, an upright type water pump 107 is provided in a form in which the whole is flooded. The upright type water pump 107 is equipped with an underwater motor 101 at the lower portion, and the pump body 102 is attached to the upper side of the underwater motor 101. The suction sleeve 108 for sucking the well water 103 is mounted on the water motor 101 side. Then, on the opposite side of the suction sleeve 108, a discharge sleeve 109 for supplying the boosted well water by an impeller (not shown) is provided.

The discharge pipe 104 is connected to the discharge sleeve 109, and the discharge pipe 104 extends to the ground. A specific control device 105 is provided in the middle of the discharge pipe 104 on the ground. The control device 105 is provided with a pressure tank that is branched from the discharge pipe 104, a pressure sensor that detects the pressure in the discharge pipe 104, and a control unit that controls the start and stop of the water supply (not shown). Then, on the downstream side of the control device 105, a distal end portion 106 is provided, from which the well water is discharged.

Next, the detailed structure of the pump body 102 will be described based on the fourth figure. The lower portion of the suction sleeve 108 serves as a suction port 110. On the other hand, the upper end portion of the protruding sleeve 109 serves as the discharge port 111. An intermediate sleeve 114 and an upper sleeve 116 are sequentially disposed between the suction sleeve 108 and the protruding sleeve 109, and a hollow cylindrical outer sleeve 124 is further provided on the outer side.

Inside the intermediate sleeve 114, an impeller 113 and a booster 117 are disposed, and the impeller 113 is fixed to a pump shaft 112 that transmits the driving force of the water motor 101. Therefore, the impeller 113 rotates together with the rotation of the pump shaft 112. Further, the example of the fourth figure is a multi-stage pump, and the impeller 113 and the booster 117 are provided with a complex array. The upper end portion of the pump shaft 112 is supported by the bearing 119 provided in the upper sleeve 116 so as to be freely rotatable.

The suction sleeve 108 and the discharge sleeve 109 are connected to the outer sleeve 124 by the screw portions 118a and 118b for connection. Further, inside the discharge sleeve 109, a check valve 120 and a check valve seat 121 in contact therewith are provided. In the upright type water pump after the operation, the weight of the well water in the discharge pipe 104 is applied from above the check valve 120, whereby the well water does not flow backward from the check valve 120. On the other hand, when the operation of the upright type water pump is restarted, the check valve 120 is opened by pressing the check valve 120 from the well water pressurized by the impeller 113.

Next, the operation of the pump body 102 regarding the upright type water pump 107 will be described. When well water is used at the end portion 106, water supply is first started with the well water in the pressure tank. This is because the pre-pressurized well water is maintained in the pressure tank. At the initial stage of the water supply, the pressure in the discharge pipe 104 is almost equal to the pressure in the pressure tank. However, when the water supply is continued, the pressure in the discharge pipe 104 is lowered, and the pressure detected in the pressure tank is lowered. When the pressure is equal to or lower than the specific value, the control unit detects this condition and sends a command to start the operation of the underwater motor 101. When the underwater motor 101 is started, the pump shaft 112 of the pump body 102 is rotationally driven to pressurize the well water and start supplying water to the discharge pipe 104.

On the other hand, when the end portion 106 is closed, the well water is supplied to the pressure tank, and the pressure in the pressure tank and the discharge pipe 104 rises. This rising pressure is detected by the pressure sensor. When the pressure in the pressure tank and the discharge pipe 104 rises to a specific value, the control unit stops the underwater motor 101 and stops pumping water from the pump body 102. At this time, the well water supplied in the discharge pipe 104 is held in the discharge sleeve 109 and the discharge pipe 104 by the action of the check valve 120 provided in the pump body 102.

However, the above prior art has the following problems. That is to say, in order to start the pumping of the upright type water pump 107, the inside of the pump body 102 must be filled with well water. When the new upright type water pump 107 is installed, there is no well water on the check valve 120, so as the well water enters, the check valve 120 is opened, and the inside air of the pump body 102 remaining under the check valve 120 is left. It is discharged to the outside. On the other hand, even if the upright type water pump 107 is operated again to pump water, the weight of the well water is applied to the upper portion of the check valve 120, so the check valve 120 is not opened and the air is not discharged.

The situation as described above occurs, for example, when the water level of the well water 103 becomes lower than the suction port 110. That is to say, while the water level is lowered, the internal body of the pump body 102 is charged. The full well water will drain the inside of the pump body 102. Thereafter, even if the well water level is restored to a higher level than the discharge port 111, the air inside the pump body 102 is not discharged to the outside, that is, in an air lock state, the well water 103 cannot be pumped. In order to restore this condition, each time the upright type water pump 107 is lifted to the ground, it is necessary to remove the well water in the discharge pipe 104. Therefore, as a precondition for the use of the upright type water pump 107, the water level of the well water 103 is often located above the pump suction port 110.

In order to solve the above problem, as shown in part B of the fourth figure, it is proposed to provide a small hole 122 in the side of the upper sleeve 116. Thereby, even in the case where the water level of the well water 103 falls below the suction port 110 and is restored again, the air in the pump body 102 is discharged to the outside through the small hole 122, thereby preventing the air lock from being generated (refer to the patent document). 1).

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Unexamined Patent Publication No. Hei 2-7393

However, the above-described prior art upright type water pump also has the following problems. That is to say, in the operation of the upright type water pump, the well water pressurized by the small holes 122 is often ejected. When the upright type water pump 107 is installed in the case of an alarm, the outer peripheral surface of the upright type water pump 107 is close to the well wall, so that the discharge flow F is in the vicinity of the well wall, and there is a possibility that the well wall is damaged.

In order to solve the above problems, it has been proposed to provide a cover 123 for flowing the discharge flow F in the vertical direction (see FIGS. 5 and 6). However, in this case, the number of parts is increased and the number of jobs is increased. Further, when the cover 123 is attached to the outside of the outer sleeve 124, the outer diameter of the pump body 102 is increased. Therefore, it will interfere with the borehole wall, and as a result, the borehole has to be enlarged. The upright type water pump 107 which is the object of the present invention can be set at a depth of about 150 m, and the excavation of the well is deeper than this. In this case, an extra period of work and an amount of work are required, so the upright type water pump 107 cannot be efficiently set.

The present invention aims to solve the problems as described above, and an object thereof is to provide an upright type water pump which does not damage the well wall and does not enlarge the outer diameter of the pump, and can appropriately be used from the pump body when restoring the well water level. The interior space discharges air.

In order to solve the above problems, the first means of the structure is a discharge sleeve for an upright type water pump, wherein at least a part of the outer surface of the discharge sleeve is formed with a connection screw portion, and the connection screw portion is screwed. The female screw on the inner surface of the outer sleeve has at least one air discharge groove formed in the connecting screw portion to cross the screw of the connecting screw portion.

By adopting such a structure, the upright type water pump functions as follows. That is, when the well water level is lowered to a lower level than the suction port, air flows into the pump body. Even if the upright type water pump is kept running, the water level of the well water will rise due to the air lock, and the water in the upright type water will sink into the well water, and the internal air of the pump can be discharged to the outside through the air discharge groove. Therefore, even if the well water level changes for the pump body, there will be no air lock.

Further, since the air discharge groove is formed along the longitudinal direction of the upright type water pump, the number of parts or the number of operations does not increase, and the influence of the jet flow during the operation of the pump on the well wall is excluded. Furthermore, since the outer diameter of the pump does not increase, it is not necessary to enlarge the caliper. Therefore, when digging a well, it is possible to expand the caliper for work and shorten the construction period.

The structure employed by the second means is attached to the structure of the first means, wherein the air discharge groove is formed to be parallel to the central axis direction of the discharge sleeve.

The structure employed by the third means is attached to the structure of the first means or the second means, wherein the bottom of the air discharge groove is located deeper than the bottom of the thread.

The structure adopted by the fourth means is added to any one of the first means to the third means, wherein the cross-sectional shape of the air discharge groove is selected from the group consisting of a rectangle, a circle, a diamond, an ellipse, a triangle, and a semicircle. Select at least one shape.

The structure adopted by the fifth means is an upright type water pump having: an suction sleeve having a suction port for sucking water; an impeller for boosting water; an intermediate sleeve covering the impeller; and being attached to the first means to the fourth a spouting sleeve of any structure of the means; an upper sleeve disposed between the spout sleeve and the intermediate sleeve; a check valve disposed inside the spout sleeve; and an outer sleeve covering the intermediate sleeve And the outer circumference of the upper casing.

The structure adopted by the sixth means is a combination body for the discharge sleeve and the outer sleeve of the upright type water pump, wherein at least a part of the outer surface of the discharge sleeve is formed with a connecting screw portion inside the outer sleeve At least a part of the surface is formed with a female screw portion screwed to the connecting screw portion, and at least one of the connecting screw portion and the female screw portion is formed with a transverse thread to One less air drain.

1, 101‧‧‧ underwater motor

2, 102‧‧‧ pump body

4, 104‧‧‧ spit out piping

8, 108‧‧‧Inhalation casing

9, 109‧‧‧ spout casing

10, 110‧‧ ‧ suction inlet

11, 111‧‧‧ spitting

12, 112‧‧‧ pump axis

13, 113‧‧‧ impeller

14, 114‧‧‧ intermediate casing

16, 116‧‧‧ upper casing

17, 117‧‧‧ booster

18a, 18b, 118a, 118b‧‧‧Connected screw

19, 119‧ ‧ bearing

20, 120‧‧‧ check valve

21, 121‧‧‧ check valve seat

24, 124‧‧‧ outer casing

25‧‧‧Air Drainage Ditch

25a‧‧‧ bottom

26‧‧‧ mesh parts

103‧‧‧ Well water

105‧‧‧Control device

106‧‧‧End

107‧‧‧Upright water pump

122‧‧‧Small hole

123‧‧‧ Cover

F‧‧‧Spout flow

L‧‧‧ center axis

The first figure is a cross-sectional view of an upright type water pump according to an embodiment of the present invention.

The second figure is a view showing a discharge sleeve for the upright type water pump disclosed in the first figure, wherein the second (A) diagram is a sectional view of the DD line of the second (B) diagram, and the second (B) The figure is a cross-sectional view along the central axis L, and the second (C) is a front view of the air discharge ditch on the front side.

The third picture is the overall structure of the well pump equipment.

The fourth figure is a cross-sectional view of a prior art upright type water pump.

The fifth figure is a partial enlarged view of the improved prior art upright type underwater pump, wherein the fifth (A) figure is an enlarged view corresponding to the position of the B part of the fourth figure, and the fifth (B) figure is the fifth ( A) A cross-sectional view of the CC line of the figure.

The sixth figure is a diagram illustrating the flow direction of the prior art discharge stream disclosed in the fifth diagram.

An upright type underwater pump according to an embodiment of the present invention will be described below with reference to the accompanying drawings. In addition, the invention of arbitrarily combining the individual constituent elements described below also includes the technical idea of being the object of the present invention.

[Overall summary]

An overall outline of an upright type underwater pump according to an embodiment of the present invention will be described with reference to the first and second drawings. Further, since the deep well pumping device including the upright type water pump is commonly disclosed as the third figure in the prior art, the description is omitted here. Further, although the well water is used in detail in the following description, the object to be used is not limited to well water, and various types of liquids can be used as objects.

The upright type water pump has a pump body 2 at the upper part and a water motor 1 (partial part) at the lower part. The pump body 2 is sequentially provided from below: a suction pipe 8 for sucking the well water; an intermediate casing 14 for accommodating the impeller 13; an upper casing 16 supporting the pump bearing 19; and a discharge sleeve disposed at the upper casing 16 Tube 9. Further, the outer sleeve 24 having a hollow cylindrical shape is further provided, and the suction sleeve 8, the intermediate sleeve 14, the upper sleeve 16, and the discharge sleeve 9 are covered from the outside.

The suction sleeve 8 and the discharge sleeve 9 are coaxial with the outer sleeve 24, and are coupled by the fastening screw portions 18a and 18b. Therefore, the outer diameters of the suction sleeve 8 and the discharge sleeve 9 are substantially the same as the outer diameter. The inner diameters of the side sleeves 24 are equal. Further, in the present embodiment, since the discharge sleeve 9 and the outer sleeve 24 are characterized, the description will first be made from the discharge sleeve 9 and the outer sleeve 24.

[spit the casing]

The discharge sleeve 9 is provided at the upper end portion of the pump body 2, and is a sleeve for supplying the well water to the discharge pipe 4. The discharge sleeve 9 is composed of a hollow cylindrical large diameter portion on the lower side, a hollow cylindrical small diameter portion on the upper side, and a hollow truncated cone portion that integrally connects the large diameter portion and the small diameter portion. Then, the upper end of the small diameter portion serves as the discharge port 11, and the discharge pipe 4 is connected to the discharge port 11.

A female screw is formed on the inner surface of the discharge port 11, and the male screw formed on the outer peripheral surface of the discharge pipe 4 is screwed. Further, on the inner surface of the lower end of the discharge sleeve 9, a groove for supporting the check valve seat 21 is formed along the circumferential direction. That is, the outer peripheral portion of the annular check valve seat 21 is fitted into the groove.

[Connecting screw part]

At least a part of the outer peripheral surface of the large diameter portion of the discharge sleeve 9 is formed with a connecting screw portion 18b. The connecting screw portion 18b is for connecting the discharge sleeve 9 and the outer sleeve 24. The connecting screw portion 18b of the present embodiment is formed over the entire diameter portion. However, the connecting screw portion 18b may be formed only in a part of the lower portion of the large diameter portion or a part above, or a part of the intermediate portion.

[air discharge ditch]

An air discharge groove 25 is formed in a part of the connection screw portion 18b of the discharge sleeve 9. The air discharge groove 25 is a groove for releasing air in the upper sleeve 16 to be described later to the outside, and is formed to extend in the vertical direction so as to cross the connecting screw portion 18b. In particular, in the present embodiment, it is formed in the direction along the central axis L of the discharge sleeve 9 (that is, in the vertical direction). However, the air discharge groove 25 of the present invention is not limited thereto, and may be formed to be slightly inclined at the connection screw portion 18b. In other words, if it is a structure that crosses the thread and connects to the outside. Of course, in consideration of the easiness of processing, although it is advantageous in parallel to the direction of the center axis L of the discharge sleeve 9, it is not limited thereto.

The cross-sectional shape of the air discharge groove 25 of the present embodiment is substantially rectangular as shown in the second (A) diagram. Therefore, it can also be circular, diamond, elliptical, triangular, semicircular Wait for any profile shape. Further, the air discharge groove 25 of the present embodiment is normally in a state of being in communication with the outside. Therefore, when the pump body 2 is normally operated, the pressurized well water in the intermediate sleeve 14 and the upper sleeve 16 leaks to the outside through the air discharge groove 25. This leakage may have an effect on the performance of the pump, so specific actions may be taken to close the air discharge channel 25. For example, consider an opening/closing valve that is set to be closed under the well water pressure during operation, and whose air pressure is not closed during the operation stop, in the air discharge groove 25.

Further, as shown in the second (A) diagram, the bottom portion 25a of the air discharge groove 25 is located deeper than the bottom of the thread of the connecting screw portion 18b. This is because even in the case where the discharge sleeve 9 and the outer sleeve 24 are screwed, the air discharge groove 25 is not blocked by the thread of the outer sleeve 24. Although the thickness of the side wall of the discharge sleeve 9 at this position is thinned by the air discharge groove 25, the depth of the air discharge groove 25 is determined in such a size as to ensure the required strength. Further, in the illustrated example, although the air discharge groove 25 is formed one, it is also possible to provide, for example, that the second air discharge groove is displaced by 180 degrees along the circumferential direction of the discharge sleeve 9, and three air discharges may be provided. Ditch at every 120 degrees. Of course, although it is also possible to provide more than four air discharge grooves, it is not desirable to set the necessary number or more in consideration of the above well water leakage. However, if the function of closing the air discharge groove 25 is added as needed, a plurality of air discharge grooves may be provided.

As described above, the air discharge groove 25 of the present embodiment is formed in the discharge sleeve 9. However, the present invention is not limited thereto, that is, even if another air discharge groove is provided in the female screw portion of the outer sleeve 24, the same effect can be expected. However, in the case where the other air discharge groove is provided in the outer sleeve 24, the inner surface of the outer sleeve 24 needs to be grooved, which is difficult to process compared to the outer surface of the discharge sleeve 9. Further, it is also considered that the thickness of the side wall of the outer sleeve 24 is also thinner than the thickness of the side wall of the discharge sleeve 9. Therefore, in the case of ensuring the processing means and the thickness of the side wall, an air discharge groove may be provided in the outer sleeve 24.

Further, it is also conceivable to form the air discharge groove in both the discharge sleeve 9 and the outer sleeve 24, and in particular, the circumferential position of the air discharge groove 25 of the connected discharge sleeve 9 and the air of the outer sleeve can be made. When the positions of the discharge grooves in the circumferential direction are the same, an air discharge groove having a larger sectional area can be formed. Moreover, even in the case where it is necessary to form the air discharge groove having a depth of the screw height of the connecting screw portion 18b and the female screw portion, if the circumferential positions of the air discharge grooves are aligned, the air discharge groove having a sufficient sectional area can be secured. . Therefore, the spouting sleeve 9 and The strength of the outer sleeve 24 is reduced. However, since the circumferential positional relationship after the connection between the discharge sleeve 9 and the outer sleeve 24 needs to be fixed, it is necessary to make a specific ingenuity.

[check valve]

Inside the discharge sleeve 9, a check valve 20 and a check valve seat 21 that abuts against the check valve 20 are provided. The check valve 20 is formed in a substantially circular shape in plan view, and has a vertical cross-sectional shape in a trapezoidal center portion and a substantially L-shaped outer peripheral portion. This check valve 20 is supported by the discharge sleeve 9 by a support mechanism not shown. On the other hand, the check valve seat 21 is an annular member having a substantially S-shaped cross-sectional shape. The outermost peripheral portion of the check valve seat 21 is fitted into the circumferential groove formed by the inner surface of the discharge sleeve 9, and the check valve seat 21 is supported by the discharge sleeve 9.

The check valve 20 is a metal member that floats from the check valve seat 21 with a press from the lower side, and can flow well water or air upward. Especially in the case of a new upright type water pump, the check valve 20 is not filled with well water, and even with a small pressing force, the check valve 20 is opened. On the other hand, even in the upright type water pump after one transportation, the well water in the discharge pipe 4 is retained on the check valve 20. Therefore, the well water weight is applied to the check valve 20 to close the check valve 20 so that the well water does not flow back from the check valve 20 to the lower side. Thereafter, the operation of the upright type water pump is reopened without generating an air lock, and the well water pressurized by the impeller 13 is pressed against the check valve 20 from below, and the check valve 20 is opened to reopen the water supply.

[outer casing]

The outer sleeve 24 is a sleeve that covers the above-described discharge sleeve 9, suction sleeve 8, intermediate sleeve 14, and upper sleeve 16. The connection between the discharge sleeve 9 and the outer sleeve 24 is performed by the above-described connection screw portion 18b. Therefore, a female screw portion screwed to the connecting screw portion 18b is formed on the inner surface of the upper end portion of the outer sleeve 24. Further, a female screw portion is also formed on the inner surface of the lower end portion of the outer sleeve 24, and the connecting screw portion 18a of the suction sleeve 8 is screwed to the female screw portion.

[suction sleeve]

Next, the suction sleeve 8 will be explained. The suction sleeve 8 is provided at the lower end portion of the pump body 2, and is connected to the underwater motor 1. A suction port 10 is formed in the suction sleeve 8, and water is sucked in from the suction port 10. A connecting screw portion 18a is formed on the outer peripheral surface of the upper end portion of the suction sleeve 8, and is screwed to the outer sleeve 24.

Further, inside the suction sleeve 8, a hollow inverted truncated mesh member is provided 26. This mesh member 26 is for preventing large foreign matter from entering the impeller 13. Therefore, a large number of holes are formed in the surface of the mesh member 26, through which the well water passes, and the entry of large foreign matter can be prevented. However, this mesh member 26 is not an essential component of the present invention.

[intermediate casing]

The intermediate sleeve 14 houses an impeller 13 and a booster 17 for boosting the well water. In other words, the impeller 13 is rotated in accordance with the rotation of the pump shaft 12, which will be described later, to impart velocity energy outward in the radial direction to the well water. The well water to which this speed energy is applied is boosted by the booster 17 and supplied to the impeller 13 of the next stage. The intermediate sleeve 14 together with the impeller 13 and the booster 17 forms a boosting passage for the well water. Further, the pump body 2 of the present embodiment is a multi-stage pump, and the impeller 13 and the booster 17 are provided with a plurality of arrays. Since the intermediate sleeve 14 of the present embodiment is provided with each of the impellers 13 and the booster 17, respectively, the number of intermediate sleeves 14 corresponding to the number of stages is juxtaposed along the central axis L.

[upper casing]

Next, the upper sleeve 16 will be explained. The upper sleeve 16 is a sleeve disposed between the intermediate sleeve 14 and the discharge sleeve 9. The upper sleeve 16 has a hollow cylindrical shape and houses a bearing 19 for supporting the pump shaft 12 therein. That is, the bearing support mechanism extends from the inner wall surface of the upper sleeve 16 in the direction of the center axis L, and the bearing 19 is supported at the position of the center axis L.

[help axis]

Inside the pump body 2, a pump shaft 12 is disposed along the center axis L. This pump shaft 12 is a rotating shaft for rotating the impeller 13 and connecting it to the underwater motor 1. The pump shaft 12 is coupled to the axis of rotation of the water motor 1 by a curve. Then, the upper end portion of the pump shaft 12 is supported to be freely rotated by the bearing 19 in the upper sleeve 16 described above.

[The role of air discharge ditch]

Next, a function of the air discharge groove 25, which is a characteristic portion of the present embodiment, will be described. The air discharge groove 25 is formed between the outer peripheral surface of the lower end portion of the discharge sleeve 9 and the inner peripheral surface of the upper end portion of the outer sleeve 24. Then, the lower end portion of the air discharge groove 25 communicates with the space inside the upper sleeve 16, and the upper end portion of the air discharge groove 25 communicates with the outer space of the pump body 2. Therefore, even when the discharge sleeve 9 is coupled to the outer sleeve 24, the inner space of the upper sleeve 16 and the outer space are constantly communicated through the air discharge groove 25.

Even if the upright type water pump of the present embodiment is operated once, the well water in the discharge pipe 4 is retained on the check valve 20 by the action of the check valve 20. In this state, for any reason, if the well water level is lowered below the suction casing 8, the air enters the intermediate casing 14 or the upper casing 16. Therefore, the well water in these intermediate casing 14 or upper casing 16 will be drained. Thereafter, the well water enters from the suction casing 8 in the case where the well water level is restored. At this time, in the case of the conventional upright type water pump 107 in which the air discharge groove 25 is not formed, since the passage of the air discharge is not formed, the well water does not enter the pump body 102, that is, an air lock is generated. Although there is no problem in the discharge of air from the check valve 120, the check valve 120 applies the weight of the well water from the upper portion, so that the air pressure cannot be completely opened, so the air cannot be discharged.

However, in the case of the upright type water pump of the present embodiment, since the air discharge groove 25 described above is formed, the air in the intermediate sleeve 14 and the upper sleeve 16 is gradually released to the outside as the well water enters. space. Finally, the upright water pump is completely immersed in the well water, and the air inside the pump body 2 is completely discharged to the outside. In this way, the air lock can be completely avoided.

As described above, the internal air of the pump body 2 can be discharged frequently, and even if the water level of the well water changes, there is no need to worry about the air lock. Further, since the direction of the air discharge groove 25 is substantially parallel to the well wall, the number of parts or the number of operations does not increase, and the bad influence of the discharge flow F during the pump operation on the well wall can be eliminated. Furthermore, since it is not necessary to increase the outer diameter of the pump, it is not necessary to enlarge the caliper. As a result, when digging a well, it is possible to carry out the work without expanding the caliper, and it is also possible to shorten the construction period.

Moreover, the above-described effect is an example of an effect achieved by the upright type underwater pump of the present embodiment, and the present invention may achieve effects other than these. Therefore, the technical idea and technical scope of the present invention should not be construed as limiting the effects according to the above technical effects. Further, the individual constituent elements described in the embodiments of the invention are not necessarily required to be combined, and any combination of individual constituent elements is established, and is also contemplated by the present application. Therefore, even if a combination of specific constituent elements is not explicitly stated, it should be construed as a disclosure of all combinations.

[Industrial availability]

The present invention can be utilized in an upright type water pump that is used in the water.

9‧‧‧Spit out casing

11‧‧‧Exporting

18b‧‧‧Connected screw

25‧‧‧Air Drainage Ditch

25a‧‧‧ bottom

L‧‧‧ center axis

Claims (6)

A discharge sleeve for an upright type water pump, wherein at least a part of an outer surface of the discharge sleeve is formed with a connection screw portion, and the connection screw portion is screwed to the female screw of the inner surface of the outer sleeve, The connecting screw portion is formed with at least one air discharge groove that crosses the screw of the connecting screw portion. The discharge sleeve according to claim 1, wherein the air discharge groove is formed to be parallel to a central axis direction of the discharge sleeve. The discharge sleeve according to claim 1 or 2, wherein the bottom of the air discharge groove is located deeper than the bottom of the thread. The discharge sleeve according to claim 1 or 2, wherein the cross-sectional shape of the air discharge groove is at least one selected from the group consisting of a rectangle, a circle, a diamond, an ellipse, a triangle, and a semicircle. shape. An upright type water pump, which is attached to the discharge sleeve according to claim 1 or 2, comprising: an suction sleeve having a suction port for sucking water; an impeller for boosting the water; and an intermediate sleeve covering The impeller; an upper sleeve disposed between the discharge sleeve and the intermediate sleeve; a check valve disposed inside the discharge sleeve; and an outer sleeve covering the intermediate sleeve and the upper sleeve The periphery. An assembly for a discharge sleeve and an outer sleeve of an upright type water pump, wherein at least a portion of an outer surface of the discharge sleeve is formed with a coupling screw portion, and at least a portion of an inner surface of the outer sleeve is formed At least one of the connecting screw portion and the female screw portion is formed with at least one air discharge groove that is transversely threaded, in the female screw portion that is screwed to the connecting screw portion.