KR100484057B1 - Improved impeller for self-primimg pump, assembly structure thereof and self-primimg pump containing the same - Google Patents

Abstract

The present invention relates to an improved impeller for a self-priming pump and an assembly structure thereof and a self-priming pump including the same.

The impeller according to the present invention has the same center as the core portion including the axial hole, the first rim and the first rim connected to the inner circumference by a plurality of radial first baffles in a straight line extending from the outer circumference of the core portion, and a plurality of straight lines. It consists of a second rim having a diameter smaller than the first rim is located in contact with at least one of the upper and lower surfaces of the upper surface of the first baffle,

The self-priming pump according to the present invention comprises first and second casings in which the suction opening and / or the discharge opening are selectively formed, the impeller according to the present invention, one or a plurality of annular members, and the impeller driving means. ,

The improved impeller for the self-priming pump according to the present invention is a non-closed or semi-closed type, which generates a strong suction pressure and a discharge pressure during rotation, and there is almost no fear of blockage even when foreign matter is present in the fluid. Direct pump consisting of the pump assembly structure and the driving means of the present invention is applied to the less noise and vibration, relatively simple configuration shows a relatively large head and markedly increased discharge pressure and discharge flow rate, dismantling of the pipe during maintenance It is possible to inspect the inside of the pump without any need for it.

Description

IMPROVED IMPELLER FOR SELF-PRIMIMG PUMP, ASSEMBLY STRUCTURE THEREOF AND SELF-PRIMIMG PUMP CONTAINING THE SAME}

The present invention relates to an improved impeller for a self-priming pump, an assembly structure thereof, and a self-priming pump including the same. More specifically, the present invention relates to a plurality of self-priming pumps having a relatively high head, a high discharge flow rate, a relatively simple structure, and good durability. It relates to a single impeller and its assembly structure and a self-priming pump including the same.

In general, a pump is a fluid machine that receives power from a driver such as a motor, an engine, a turbine, or the like to transport a fluid such as a liquid or a gas through a pipe, or pumps a fluid in a low pressure container into a high pressure container through the pipe. Say. Pumps were initially used in coal mine drainage, ships and pumping, and are now widely used in buildings, waterworks, sewerage, drainage, agricultural irrigation, industrial water, power plants, and various plants. Pumps are widely used for transporting not only water but also special fluids such as petroleum, various chemicals or pulp and viscous sludge.

The pumps can be classified into reciprocating pumps, rotary pumps, centrifugal pumps, axial pumps, friction pumps, and other pumps, depending on their structure.The pumps can be classified into feedwater pumps, shallow well pumps, deep well pumps, etc. Occasionally, devices that draw vacuum by drawing air or other gases from a vessel are specially vacuum pumps.

It can also be roughly divided into non-suction pumps which require priming during initial operation of the pump and self-suction pumps which do not require them.

An example of a conventional self-priming pump is shown in FIG. 7, which is a single stage having an upper casing 30 having a suction hole 31 and a discharge hole 32, a radial wing and a rim. stage: The impeller 40, the lower casing 20 which has the annular groove 21, and the motor 10 are comprised. The shaft 11 of the motor 10 penetrating the center of the lower casing 20 is inserted into the shaft hole 42 and the key insertion groove 41 of the impeller 40 via the key 12. Fixing screw 35 is to screw the flange portion of the upper casing 30 and the lower casing 20, reference numeral 36 is a drain cock.

Referring to the operation of the conventional self-priming pump through the illustrated example, when the impeller 40 is rotated in the counterclockwise direction by the motor 10 annular suction opening (not shown) formed in the upper casing (30) The negative pressure is applied to the part and water is sucked, and the sucked water is transferred along the annular groove 21 of the lower casing 20 opposite the impeller 40, and then the annular discharge opening formed in the upper casing 30 ( And then extruded through the discharge hole 32.

In another modification, in the configuration of FIG. 7, the annular groove is also formed in the upper casing, or one surface of the impeller facing the lower casing of the impeller is formed as a closed surface, and a circular through hole for fluid passage is provided at several places of the closed surface. It is also possible to form a plurality of perforations, or to form an annular groove only in the upper casing, and to form one surface of the impeller facing the lower casing of the impeller as a closed surface and not to form an annular groove in the lower casing.

However, the above-described conventional self-priming pumps have a simple configuration and have a small installation area and do not require a pick-up for initial operation. However, all of them employ a single stage impeller and an annular groove configuration. As a result, there is a problem that the head is relatively low and the discharge pressure and discharge flow rate are low.

Therefore, there has long been a need in the art for a more efficient self-suction pump having a relatively simple configuration, a small installation area, and having a larger head, a higher discharge pressure, and a larger discharge flow rate.

The first object of the present invention is to generate a strong suction pressure and discharge pressure during rotation, and even if there is a solid foreign matter or contaminants in the fluid as a non-clog, there is almost no concern about the blockage phenomenon during operation of the pump. It is to provide an improved impeller for the self-priming pump.

The second object of the present invention is to display a relatively large head and a markedly increased discharge pressure and discharge flow rate in a relatively simple configuration, it is possible to inspect the inside of the pump without dismantling the pipe during maintenance, and during the initial operation It is to provide a self-priming pump assembly structure for accommodating the improved impeller for the self-priming pump according to the first object of the present invention, which is easy to use, reliable, and has low noise and vibration because of no introduction. .

It is a third object of the present invention to provide a self-priming pump comprising an improved assembly structure according to the second object of the present invention described above.

The first object of the present invention described above can be effectively achieved by a single-stage impeller of an integral or separate type (non-integrated).

The second object of the present invention described above can be effectively achieved by the improved self-contained pump impeller receiving assembly consisting of the multistage impeller, the annular member, and the upper and lower casings containing the same.

The third object of the present invention can be effectively achieved by the above-described improved self-priming pump including impeller receiving assembly structure for self-priming pump and impeller rotating means.

Hereinafter, the present invention will be described in detail with reference to the drawings.

Figure 1a is an exploded perspective view of the main portion of the self-priming pump 100 according to an embodiment of the present invention, the self-priming pump 100 according to the present invention is a multi-stage impeller (1), the upper casing 20, the annular member 10, 10a, the lower casing 30, and the impeller drive means 70 are comprised.

First, the multi-stage impeller 1 according to the present invention will be described with reference to FIG. 1C, which is a perspective view showing the multi-stage impeller used for the self-suction pump of FIG. 1A. It consists of an impeller (2) and a second two-stage impeller (3), each of the two-stage impeller (2, 3) is a large diameter first rim (4), small diameter second rim (4a), key groove (drawings) Cylindrical core part (not shown) including shaft hole 7 with unsigned), a plurality of extending from the outer periphery of the core part to the inner periphery of the first rim 4 of the large diameter described above. Straight first radial baffle 5 without inclination angle and straight second radial baffle 5a without a plurality of inclination angles extending from the outer circumference of the core portion to the inner circumference of the second rim 4a of small diameter. (As shown in FIG. 2A or in a shape having an inclined gradient or a predetermined inclination angle, or FIG. 6A It may be formed of a collar in the form of spiral with the inclination angle and the inclination gradient at the same time, as shown, to improve the lift and discharge pressure to consist of all of them is within the scope of the invention).

Here, in the example shown in FIG. 1A, the linear first radial baffle 5 and the linear second radial baffle 5a are formed at the same position to coincide with each other, but the present invention is not limited thereto, and the present invention is not limited thereto. It may be formed alternately.

The illustrated example shows an example of a separate, non-integral configuration, in which a first two-stage impeller 2 and a second two-stage impeller 3 are formed in the first rim 4 of the large diameter described above. It is fixed by an appropriate fixing means (not shown), such as a fixing screw, a laser welding part, etc. through a part (not shown).

However, as shown in Fig. 1c, the multi-stage impeller 1 according to the present invention may be formed in one piece instead of in a separate manner. In the illustrated example, the first rim 4 having a large diameter is integrally formed as a single body. At the same time, two second rims 4a having a small diameter are also formed integrally with the first rim 4 described above. However, it is, of course, also within the scope of the present invention that the two second rims 4a of small diameter can be separated and fixed by appropriate fixing means on the same axis above and below the first rim 4 above. .

The multi-stage impeller 1 of the present invention is made of stainless steel (SUS), aluminum or an alloy thereof, high strength and high-strength engineering plastics or ceramic materials, and high hardness anti-corrosion-plated carbon steel, etc., because the entire stage is a liquid contact part. Can be formed.

FIG. 1B is a detailed cross-sectional view of the assembled state of the A part in FIG. 1A (assembly structure according to the present invention), and FIGS. 1D and 1E respectively show the bottom surface of the upper casing 20 which can be used in the self-priming pump of FIG. 1A. As a perspective view and a bottom view, it demonstrates with FIG. 1A for convenience of description.

First, the upper casing 20 has a flange 25 which protrudes inwardly in which a plurality of screw holes 23 are formed at the periphery thereof, and the suction hole 21 and the discharge hole 22 are formed on the upper surface thereof. The suction hole 21 and the discharge hole 22 communicate with the annular suction opening 21a and the annular discharge opening 22a which are opened in the bottom surface 28 of the upper casing 20.

A plurality of annular members 10a are formed on one side of the bottom surface in a direction orthogonal to the extension line, avoiding the extension line of the suction opening 21a and the discharge opening 22a of the upper casing 20. It is fixed by the fixing screw 82 screwed to the threaded hole (11). Subsequently, the outer surface of the second rim 4a of the first two-stage impeller 2 in the multi-stage impeller 1 according to the present invention is located opposite the arc-shaped inner surface of the annular member 10a. .

The lower casing 30 has a flange 31 having a plurality of threaded holes 32 formed at its periphery, and a shaft hole 33 penetrates through the central bottom 35 thereof, and the annular member 10a described above. The other annular member 10 is fixed to the one side region corresponding to with the fixing screw 82 screwed into the plurality of screw holes (11). Accordingly, the outer surface of the second rim 4a of the second two-stage impeller 3 in the multi-stage impeller 1 according to the present invention as shown in FIG. 1A is in the arc image of the annular member 10 described above. It is located opposite the side.

The large fixing screw 81 includes a housing 50 in which the upper casing 20 and the lower casing 30, the connecting plate 40 below the lower casing 30, and the coupler 60 are accommodated. Fixing at the same time, any impeller drive means 70 such as a motor is installed on one side of the housing 50 described above.

As shown in FIGS. 1D and 1E, a concave hole 24 may be formed in the central portion of the upper casing 20, and one end of the shaft 85 may be positioned via a rolling bearing nut 83. The shaft 85 is fixed to the plural-stage impeller 1 of the present invention by the key 84 to rotate together.

A stop ring 86 is inserted at one end of the outer circumference of the shaft 85 inserted through the shaft hole 33 formed at the center of the bottom 35 of the lower casing 30, and leaks of water and fluid are below. A mechanical seal 87 is located to effectively prevent it. A bearing 88 is installed around the shaft 85 between the intermediate plate 40 and the housing 50, and a stop ring 89 is mounted around the shaft inside the housing 50.

On the other hand, the length of the annular member 10, 10a is the suction opening described above from the semicircular length reaching the center of each of the suction opening 21a and the discharge opening 22a of the upper casing 20 described above. It can be formed in various lengths up to 1/3 arc-shaped length to reach the end of the (21a) and the discharge opening (22a), the shape of both ends of the annular member (10, 10a) may be formed at right angles, For the sake of smooth fluid flow and thus vibration reduction, the end faces of both ends may be formed as straight inclined surfaces as shown, or may have a rounded curved gradient.

In the example shown in FIGS. 1A-1E, when the multistage impeller 1 according to the invention is rotated clockwise from the upper casing 20 toward the lower casing 30 by means of the impeller driving means 70. The negative pressure is applied to the annular suction opening 21a portion of the upper casing 20 so that the suction hole 21 and the suction hole 21 are separated from the three o'clock end region (when viewed from the front of the upper casing 20) of the annular member 10a. The fluid is sucked through the annular suction opening 21a, and the sucked fluid is pressurized while rotating through the space between the first and second radial baffles 5, 5a of the first two-stage impeller 2 and the second two-stage impeller After exiting into the space between the first and second radial baffles 5, 5a of (3), the annular member 10 provided on one side of the lower casing 30 (the position corresponding to the annular member 10a described above). Is further pressurized by one side end positioned in the 9 o'clock region of It is discharged to the discharge hole 22 via the space part between the 1st and 2nd radial baffles 5 and 5a of the two stage impeller 2 and the annular discharge opening 22a of the upper casing 20 in order.

In the example shown in FIGS. 1A to 1E, both the suction hole 21 and the discharge hole 22 are formed in the upper casing 20, and the baffles 5 and 5a of the multi-stage impeller 1 of the present invention are fluids. It is a non-clog type that is open in both directions so that the blockage by foreign substances or contaminants in the container can be prevented, and the annular members 10 and 10a are located opposite to each other on one side of the same position in the same direction. It should be noted that the present invention is not limited thereto.

2A to 2C are partial cutaway perspective views of the multistage impeller 1a according to the second embodiment of the present invention, which may be preferably used for the self-priming pump of FIG. 1a, respectively, and the multistage impeller shown in FIG. As a plan view of 1a) and a cross-sectional view taken along line II of FIG. 2b, the essential configuration thereof is the same as the configuration shown in FIG. 1a described above.

The multi-stage impeller 1a according to the invention in the illustrated example consists of a first two-stage impeller 2 and a second two-stage impeller 3, with each two-stage impeller 2, 3 having a large diameter first rim. The large diameter first rim (4) from the outer periphery of the cylindrical core portion (6) comprising a shaft hole (7) having a second groove (4a) and a small diameter second rim (4a); The point where the first radial baffle 5 is formed without a plurality of inclination angles extending to the inner circumference of s) is the same as the case shown in FIG. 1A, but the small diameter described above from the outer circumference of the core part 6 The second radial baffle 5a, which extends to the inner circumference of the second rim 4a, is formed to be inclined in a straight line at a predetermined angle with its bottom face coinciding with the top surface of the first radial baffle 5 to lift and discharge. In addition to improving the pressure, there is a difference in that it is configured to have a cutting effect on solid foreign substances or contaminants in the fluid. . The inclination angle or the inclination gradient of the second radial baffle 5a having the plurality of inclination gradients described above can be appropriately selected as necessary in consideration of the use, performance, etc. of the pump in relation to the head lift, discharge pressure, flow rate, etc. required by those skilled in the art. As a matter of design only, various possible structures are also within the scope of the present invention.

Here, the first two-stage impeller (2) and the second two-stage impeller (3) through the screw hole (8) of the screw hole forming portion 8 formed at a predetermined constant interval on the first rim (4) of large diameter It is interlocked and fixed by the fixing screw 15 inserted.

3A is a perspective view of a multistage impeller 1b according to a third embodiment of the present invention, which may be preferably used in the self-priming pump of FIG. 1A, and FIG. 3B is an upper casing when the multistage impeller of FIG. 3A is applied. As a bottom perspective view showing the bottom surface of 20, since the configuration is essentially the same as that of Figs. 1A to 1E, only substantial differences will be described.

The multi-stage impeller 1b of the present invention shown in FIG. 3a consists of only one multi-stage integral impeller, each having a large diameter of the first rim 4 and the upper and lower surfaces of the first rim 4 described above. Cylindrical core portion 6 comprising two small rims 4a of small diameter to be formed, a shaft hole 7 having a key groove (not shown), and the above-described outer periphery of the core portion 6 described above. The core part 6 consists of a plurality of linear radial baffles 5 extending up to the inner circumference of the first rim 4 of large diameter, unlike the multi-stage impeller 1 shown in FIGS. 1A and 1C. There are no plurality of second radial baffles extending from the outer circumference of the inner edge to the inner circumference of the small diameter second rim 4a.

In the illustrated example, the plural-stage impeller 1b is integrally formed, but it may be a form that is coupled by a coupling means such as a fixing screw.

On the bottom of the upper casing 20 to which the multi-stage impeller 1b of FIG. 3A is applied, a protruding bottom 27 is formed in an area defined by the second rim 4a having a small diameter. An annular space portion 27a is formed between the outer circumferential portion of the portion 27 and the curved inner surface of the annular member 10a in which the small diameter rim 4a is rotatably positioned. The annular suction opening 21a and the annular discharge opening 22a are formed symmetrically with each other at the periphery of the circular concave portion 24, which is an axial tip accommodating portion, which may be formed at the center portion of the protruding bottom portion 27 described above. Although not shown, the discharge hole and the suction hole outside the upper casing 20 may be withdrawn to a position facing each other or perpendicular to each other.

Although not shown, a protruding bottom is formed on the bottom of the lower casing, and the annular space portion in which the second small rim 4a of the other diameter is rotatably positioned between the annular member is installed.

Looking at the exploded perspective view of the main portion of the self-priming pump 100a according to another preferred embodiment of the present invention shown in Figure 4a, the self-priming pump 100a according to the present invention is a multi-stage impeller (1c) as in the case of FIG. , The upper casing 20, the annular members 10, 10a, the lower casing 30, and the impeller driving means 70.

The multi-stage impeller 1c according to the fourth embodiment of the present invention will be described with reference to FIG. 4b, which is a perspective view of the multi-stage impeller 1c used for the self-suction pump 100a of FIG. 4a. (1c) consists of a first two-stage impeller (2) and a second two-stage impeller (3) and a stationary intermediate plate (9) interposed therebetween, each of the two-stage impellers (2,3) having a large diameter first Cylindrical core portion 6 comprising a rim 4, a second diameter rim 4a of small diameter, and a shaft hole 7 having a key groove (not shown), from the outer periphery of the core portion 6 described above. A plurality of linear first radial baffles 5 extending up to the inner circumference of the first large rim 4 and the second small rim 4a as described above from the outer circumference of the core portion 6. Although a plurality of linear second radial baffles 5a extending in the inner circumference of the second radial baffle 5a (in the illustrated example, the second radial baffles 5a are formed in a straight flat shape without an inclination angle, It may, of course, be formed in the form of a straight or spiral feather with an inclination angle and / or an inclination gradient, which is also within the scope of the present invention).

The stationary intermediate plate 9 interposed between the first two-stage impeller 2 and the second two-stage impeller 3 has a flange 9b extending outward from the outer diameter of the large diameter second rims 4, 4. In the flange 9b, a plurality of threaded holes 9a are formed and sandwiched between the upper casing 20 and the lower casing 30, and then fixed simultaneously by a large fixing screw (for example, reference numeral 81 in FIG. 1B). do. Thus, the first two-stage impeller 2 and the second two-stage impeller 3 are formed in a separate type independent of each other, the intermediate plate 9 is fixed regardless of the rotation of the drive shaft, the second rim 4a of small diameter An opening is formed in a region defined by the inner circumferential region of) so that the fluid can move, preferably between the second rim 4a of the small diameter and the first rim 4 of the large diameter. An annular hole 9c for fluid passage is also formed in the region. The linear second radial baffles 5a, 5a of the first two-stage impeller 2 and the second two-stage impeller 3 are preferably formed at exactly opposite positions, and the second radial baffles 5a, 5a are In addition, the bottom and top surfaces of the second radial baffles 5a and 5a may be formed at the same positions facing each other, but the inclination angle and / or the slope may be assembled. In the state is formed in the same direction with each other.

The first radial baffle 5 and the second radial baffle 5a and the second rim 4a of each of the first two-stage impeller 2 and the second two-stage impeller 3 are integral with each other, or fixing means such as screws. It can be any of the separated types joined by.

Referring back to FIG. 4A and substantially different from FIG. 1A, only the suction hole 21 and the annular suction opening (not shown) are formed in the upper casing 20, and the discharge hole 34 and the annular discharge opening are formed. 34a is formed in the lower casing 30, and the annular member 10 and the annular member 10a are arrange | positioned above and below the impeller 1c in the area which is mutually symmetrical.

Therefore, in the example shown in FIG. 4A, when the multi-stage impeller 1c according to the present invention is rotated clockwise by the impeller driving means 70 (the intermediate plate 9 is fixed not to rotate), the upper casing ( A negative pressure is applied to a portion of the annular suction opening (not shown) formed in the three o'clock region (viewed from the front of the upper casing 20 outside), and the region adjacent to the three o'clock region of the annular member 10a. The fluid is sucked through the suction hole 21 and the annular suction opening (not shown), and the sucked fluid is pressurized in an area adjacent to the three o'clock region of the annular member 10a so that the second of the first two-stage impeller 2 is sucked. Between the space between the radial baffles 5a and the second radial baffle 5a of the second two-stage impeller 3 via an opening (not shown) in the center of the fixed intermediate plate 9 and the annular hole 9c. After exiting while rotating clockwise from the space portion, the second two-stage impeller 3 1 annular member 10 provided on one side of the lower casing 30 (downward position corresponding to the region symmetrical with the annular member 10a described above) while rotating clockwise along the space between the radial baffles 5. It is further pressurized by one side end of the 3 o'clock direction, and is discharged to the discharge hole 34 via the annular discharge opening 34a formed in the 3 o'clock region of the lower casing 30. As a result, the fluid sucked through the suction hole 21 of the upper casing 20 is transferred through the discharge hole 34 of the lower casing 30.

In the example shown in FIG. 4A, the suction hole 21 and the discharge hole 34 are formed in the upper casing 20 and the lower casing 30, respectively, and the multi-stage impeller 1c of the present invention includes a baffle 5a. The baffle 5 is partially open by the intermediate plate 9 so that the blockage by foreign matter or contaminants in the fluid can be prevented. semiclog type, and the annular members 10 and 10a are each positioned in a line symmetrical region in the front-rear direction of the impeller 1c, but it should be noted that the present invention is not limited thereto.

Another type of multistage impeller 1d according to the invention which can be applied to the example shown in FIG. 4a is shown in FIG. 4c.

In the basic configuration of the multi-stage impeller 1d according to the fifth embodiment of the present invention shown in FIG. 4C, the outer periphery of the intermediate plate 9 coincides with the outer periphery of the first and second two-stage impellers 2, 3. They are fixed together by a fixing screw 15 or the like, so that the intermediate plate 9 also rotates together by the rotation of the drive shaft, and the multistage impeller 1a of the present invention shown in FIG. Substantially the same. The intermediate plate 9 and the first and second two-stage impellers 2 and 3 can be made in one piece, and the central region of the intermediate plate 9 defined by the second rims 4a and 4a The same is true of openings (not shown) that allow fluid to pass therethrough. Alternatively, it is preferable to form the annular hole 9c for fluid passage in one region between the first rim 4 and the second rim 4a. In addition, as another modified multistage impeller according to the present invention, the second radial baffle 5a is formed on either or both of the second rims 4a and 4a of the first and second two-stage impellers 2 and 3. The structure as shown in FIG. 3A which is not made is mentioned, and this also goes within the scope of the present invention.

5A is a perspective view of a self-suction pump 100b in the form of a positive suction in accordance with another exemplary embodiment of the present invention, and FIG. 5B is an assembly structure 200 according to the present invention which is a main part of FIG. 5A. As an exploded perspective view, since the essential structure is the same as the example shown in FIGS. 1A-1E, only the difference is demonstrated.

The self-suction pump 100b of the present invention, shown in FIG. 5A, has a pump assembly structure 200, a drive unit 70 such as a motor, a coupler 60, and a bed 80 as an optional component. It consists of

The pump assembly 200 according to the present invention shown in FIG. 5B has an upper casing having an annular suction opening 21a communicating with the suction hole 21 and an annular discharge opening 21b communicating with the discharge hole 34. 20, a multi-stage impeller 1e according to the sixth embodiment of the present invention, an annular suction opening communicating with the single annular member 10 interposed between the impeller 1e and the suction hole 21 It consists of the lower casing 30 which has 34b and the annular discharge opening 34a which communicates with the discharge hole 34 together.

The multi-stage impeller 1e of the present invention according to the illustrated example is composed of two sets, and each two-stage impeller 2,3 is arranged to protrude about only one annular member 10 and is mutually separated or It can be configured in one piece. The radial baffles 5, 5a are shown as being straight, with no inclination angle and / or inclination gradient, respectively, but the radial baffles 5a of each impeller 2,3 have respective inclination angles and / or inclination gradients combined. It may form in the same direction mutually in a state, and this is also in the area of the present invention.

In the example shown in FIGS. 5A and 5B, the upper casing 20 and the lower casing 30 are positioned at positions in which the suction hole 21 and the discharge hole 34 are symmetric about the recessed hole 24 and the shaft hole 33. Are formed at the same time, respectively, and the multi-stage impeller 1e of the present invention is a non-clog type in which the baffles 5 and 5a are open in both directions to prevent the blockage by foreign matter or contaminants in the fluid. ), A single annular member 10 is fixed in the region between each two-stage impeller 2 and 3 and the annular member 10 is connected to the upper casing 20 through a threaded hole 11 formed on its outer surface. And / or screwed into the inner periphery of the flanges 25, 31 of the lower casing 30. In addition, both ends of the single annular member 10 may be a wedge shape or a round shape for a right angled end surface or for noise reduction.

Therefore, in the example shown in FIGS. 5A and 5B, when the multi-stage impeller 1e according to the present invention is rotated counterclockwise by the impeller driving means 70, the upper casing 20 and the lower casing 30 are rotated. A negative pressure is simultaneously applied to the annular suction openings 21a and 34b respectively formed in a total of two in each of the 9 o'clock directions (as viewed from the outside of the upper casing 20 front), so that the annular member 10 Fluid is simultaneously sucked through the suction hole 21 and the annular suction openings 21a and 34b from an area adjacent to the nine o'clock region to counterclockwise through the space between the radial baffles 5 and 5a of the impellers 2 and 3. Flows in a direction, and is pressurized in an area adjacent to the three o'clock region of the annular member 10 so that the upper casing 20 and the lower casing are separated from the space between the radial baffles 5, 5a of the impellers 2, 3. A total of two formed in each of the three o'clock region of 30 Via a type discharge opening (21b) and (34a) to be discharged in one discharge hole (34). As a result, the fluid sucked through the suction hole 21 in communication with the upper casing 20 and the lower casing 30 simultaneously discharges the discharge hole 34 in communication with the upper casing 20 and the lower casing 30. Conveyed through.

Therefore, it is possible to implement a high efficiency self-priming pump having a much higher head and discharge pressure and discharge flow rate than the self-priming pump of the single suction single discharge type.

6A is an exploded perspective view of the multi-stage impeller 1f according to the seventh embodiment of the present invention, and FIG. 6B is a cross-sectional view of the lower casing 30 to which the impeller 1f of FIG. 6A is applied, the configuration of which has been described above. It is essentially the same as the configuration of the various examples, so only the substantial differences will be described.

Compared to the multi-stage impeller 1a of the present invention shown in FIG. 2A, the impeller 1e of FIG. 6A has a non-radial second baffle 5a extending from the core portion 6 to the second rim 4a. It is formed in a spiral shape and is particularly suitable for the transport of high viscosity fluid. In addition, since the horizontal length of the second rim 4a is formed to be much longer than the horizontal length of the first rim 4, it is suitable to exert a strong conveying force, and the lower casing 30 also The second bottom portion 35a is formed by the cylindrical wall 37 again in the center of the first bottom portion 35 so as to accommodate the second rim 4a portion of the multistage impeller 1e of this type. The shaft hole 33 is formed in the center of the 2nd bottom part 35a.

Although not shown, the upper casing is of a similar form, and of course, the annular suction opening and the annular discharge opening are formed.

Accordingly, when the multi-stage impeller 1e is rotated, the liquid is caused by the centrifugal force generated by the impeller having the same shape as the impeller 1 in FIG. 1A, and the spiral second inside the second rim 4a on the left side in the drawing. It is sucked at a high speed through the baffle 5a and this velocity energy is converted into a high pressure energy through the spiral second baffle 5a inside the second rim 4a on the right side of the drawing, and is discharged, thus transferring efficiency of a high viscosity fluid. Will be higher.

As described above, the improved impeller for the self-priming pump according to the present invention generates a strong suction pressure and a discharge pressure during rotation, and is transported as a non-clog or a semi-closed type that is both open. Even if solid foreign matter or contaminants are present in the target fluid, there is almost no possibility of blockage during operation of the pump.In this case, since the pump assembly structure and the motor as the driving means can be connected directly, the noise and vibration are relatively low. Its simple configuration enables the display of relatively large heads and markedly increased discharge pressures and discharge flow rates.It is possible to check the inside of the pump without dismantling the pipes during maintenance. This is high.

Although the present invention has been described in detail with reference to preferred embodiments and examples according to the present invention, it is only for illustrating the present invention and is not intended to limit the present invention, and those skilled in the art will be able to make various changes without departing from the scope of the present invention. It is to be noted that variations and modifications are of course possible, as well as within the scope of the present invention.

Figure 1a is an exploded perspective view of the main portion of the self-priming pump according to a preferred embodiment of the present invention.

FIG. 1B is a cross sectional view of the assembled portion A in FIG. 1A.

FIG. 1C is a perspective view of a multiple stage impeller in accordance with a first embodiment of the present invention that may be preferably used in the self-priming pump of FIG. 1A.

FIG. 1D is a perspective view showing the bottom surface of the upper casing with the annular member used in the self-priming pump of FIG. 1A mounted. FIG.

FIG. 1E is a bottom view of the upper casing of FIG. 1D with the annular member unmounted. FIG.

FIG. 2A is a partially cutaway perspective view of a multi-stage impeller according to a second embodiment of the present invention that may be preferably used in the self-priming pump of FIG. 1A. FIG.

FIG. 2B is a plan view of the multistage impeller shown in FIG. 2A. FIG.

FIG. 2C is a cross-sectional view taken along line II of FIG. 2B.

3A is a perspective view of a multi-stage impeller according to a third embodiment of the present invention, which may be preferably used in the self-priming pump of FIG. 1A.

3B is a perspective view illustrating the bottom of the upper casing when the multi-stage impeller of FIG. 3A is applied.

4A is an exploded perspective view illustrating main parts of a self-priming pump according to another exemplary embodiment of the present invention.

4B is a perspective view of a multi-stage impeller according to a fourth embodiment of the present invention for use in the self-priming pump of FIG. 4A.

4C is a perspective view of a multi-stage impeller according to a fifth embodiment of the present invention for use in the self-priming pump of FIG. 4A.

Figure 5a is an exploded perspective view of the main portion of the self-priming pump according to another preferred embodiment of the present invention.

5B is a perspective exploded perspective view of FIG. 5A, in which a multi-stage impeller according to a sixth embodiment of the present invention is shown.

6A is an exploded perspective view of a multi-stage impeller according to a seventh embodiment of the present invention.

6B is a cross-sectional view of the lower casing to which the impeller of FIG. 6A is applied.

7 is an exploded perspective view of the main portion of a conventional self-priming pump for receiving a conventional single stage impeller.

-Explanation of symbols for the main parts of the drawings-

1, 1a to 1f: multi-stage impeller according to a preferred embodiment of the present invention

2: first-stage impeller 3: second-stage impeller

4: first figure 4a: second figure

5: first radial baffle 5a: second radial baffle

6: core portion 7: shaft

7a: keyway 8: screw hole forming portion

9,91,92: intermediate plate 9a: threaded hole

9b: flange 9c, 9d: annular hole

10, 10a: annular member 11: screw hole

20: upper casing

21: suction hole 21a: annular suction opening

22: discharge hole 22a: annular discharge opening

23: screw hole 24: concave hole

25: flange 27: protrusion bottom

28: bottom portion 28a: annular space portion

30: lower casing

31: flange 32: screw hole

33: shaft hole 34: discharge hole

34a: annular discharge opening 35: bottom

36: projection 37a: annular suction opening

40: connecting plate 50: housing

60: coupler 70: drive means (motor)

81: large set screw 82: annular member set screw

83: nut for rolling bearing 84: key

85: axis 86: stop ring

87: mechanical seal 88: bearing

89: stop ring

100, 100a, 100b: self-priming pump according to one preferred embodiment of the present invention

200: assembly structure according to one embodiment of the present invention

Claims (11)

A core portion including an axial hole, a first rim having an inner circumference connected by a plurality of linear first baffles extending from an outer circumference of the core portion, and having the same center as the first rim, It consists of a first two-stage impeller and a second two-stage impeller positioned in contact with each of the upper and lower surfaces of the linear baffle forming surface of each of the second rim having a diameter smaller than the first rim, The first two-stage impeller and the second two-stage impeller are formed in a separate or integral type coupled by a fixing means Plural impeller for self-primimg pumps. 2. The multistage impeller of claim 1 wherein said second rim is connected by a plurality of radial second baffles extending from the outer periphery of the core portion. 3. The multistage impeller of claim 2, wherein each of said plurality of radial second baffles extends in the same direction at the same position as each of said plurality of radial first baffles. 3. The method of claim 2, wherein each of the plurality of radial second baffles is connected to each of the plurality of radial first baffles, and each of the plurality of radial first baffles has a straight line, a spiral shape, a straight line having a constant tilt angle, or a constant slope gradient. Multi-stage impeller for self-priming pump formed in a curved shape having. delete The intermediate plate having an outer periphery coinciding between the first two-stage impeller and the second two-stage impeller is interposed, and the intermediate plate has a region defined by the second rim. And an annular hole for fluid passage in one region between the first rim and the second rim, wherein the annular hole is formed on a region corresponding to the annular discharge opening. An upper casing having a discharge opening symmetrically positioned in the suction opening, and having an annular member mounted on one side of the inner circumference such that the center is located on a line orthogonal to the extension line of the suction opening and the discharge opening; A multistage impeller according to claim 1 rotatable by a drive means; It consists of a lower casing having an axial hole in the center and an annular member mounted on one side of the inner circumference, The outer circumference of the second rim of the impeller is located opposite to the arcuate inner surface of the two annular members, and the annular member mounted on the upper casing and the annular member mounted on the lower casing are the same. Self-contained pump assembly structure located in the same one region corresponding to each other in the direction. An upper casing having a suction opening and having an annular member mounted on one inner peripheral side thereof so that one end thereof is located above one side adjacent to the suction opening; A multistage impeller according to claim 1 rotatable by a drive means; It is composed of a lower casing having an annular member which is mounted on one side of the inner circumference thereof so that one end is located below one side adjacent to the discharge opening and has a discharge opening and an axial hole, The outer periphery of the second rim of the impeller is positioned opposite the arcuate inner surface of the annular member, and the annular member mounted on the upper casing and the annular member mounted on the lower casing are respectively impellers. And the suction opening and the discharge opening are located symmetrically with respect to the axial hole of the impeller. An upper casing having an annular suction opening and an annular discharge opening; A core portion including an axial hole, a first rim in which the inner circumference is connected by a plurality of linear first baffles extending from the outer circumference of the core portion, and a plurality of linear rims extending from the outer circumference of the core portion. Two sets of two-stage impellers composed of one second rim having a diameter smaller than the first rim formed on only one surface of the first rim connected to the inner circumference by a radial second baffle are formed in one pair, A multistage impeller rotatable by the drive means; A lower casing having an annular suction opening and an annular discharge opening and an axial hole; Consists of only one annular member which is fixed to the inner circumference of the flange of the upper casing and / or the lower casing and is located between predetermined intervals of the two sets of multistage impellers, The annular suction opening of the upper casing and the annular suction opening of the lower casing are located in the same one region corresponding to each other in the same direction and communicate with one suction opening simultaneously, and the annular discharge opening of the upper casing and the The annular discharge openings of the lower casing are located in the same one side area corresponding to each other in the same direction and communicate with one discharge opening simultaneously. The annular suction opening and the annular discharge opening formed in each of the upper casing and the lower casing are located symmetrically with respect to the axial hole of the multistage impeller, and both ends of the annular member are the annular suction opening and the annular opening, respectively. Respectively located in the upper and lower regions adjacent to the discharge opening Self-priming pump assembly structure of the positive suction positive discharge type. A first casing in which an annular member is mounted on one side of the inner circumference; A second casing having an annular suction opening and an annular discharge opening positioned opposite each other about the shaft hole and the shaft hole; It is composed of a multi-stage impeller according to any one of claims 7 to 9, The outer circumferential surface of the core portion of the multi-stage impeller is positioned to face the arc-shaped inner surface of the annular member mounted to the first casing, and both ends of the circular member are respectively the suction opening and the discharge opening of the second casing. Self-contained pump assembly structure located in the upper or lower region adjacent to. A self-priming pump comprising a self-priming pump assembly structure according to any one of claims 7 to 9 and a driving means for rotating the impeller.