Open impeller flow guide structure for horizontal self-priming pump

Abstract

The utility model relates to the technical field of self-priming pumps, in particular to an open impeller flow guide structure for a horizontal self-priming pump, which comprises an impeller body and a flow guide component. The impeller body comprises a connecting part used for being connected with a main shaft, and the impeller body rotates to form an impeller runner; the flow guide component comprises a flow guide plate body and two arc-shaped guide vanes, the flow guide plate body and the impeller body are coaxially arranged, the two arc-shaped guide vanes are arranged in the circumferential direction of the flow guide plate body, the two arc-shaped guide vanes are both arranged on the outer side of the impeller body, the two arc-shaped guide vanes are arranged in a staggered mode in the radial direction, and a guide vane channel is formed between every two adjacent arc-shaped guide vanes. A guide vane passageway is formed on the outer side of the arc-shaped guide vane, an inlet of the guide vane passageway is communicated with an outlet of the impeller passageway, and an outlet of the guide vane passageway is communicated with the guide vane passageway. The utility model is favorable for discharging the gas-liquid mixture, reducing the vibration of the pump, prolonging the service life of the pump and reducing the noise.

Description

Technical Field

[0001] The utility model relates to the technical field of self-priming pumps, in particular to an open impeller flow guide structure for a horizontal self-priming pump. Background Art

[0002] The self-priming pump has the advantages of compact structure, convenient operation, stable operation, easy maintenance, high efficiency and long service life. After the self-priming pump is started normally, the impeller sucks in the liquid stored in the liquid inlet flow channel and the air in the suction pipeline together, and they are completely mixed in the impeller. Under the action of centrifugal force, the liquid carries the gas to the outer edge of the impeller, forming a white foam belt with a certain thickness and a high-speed rotating liquid ring on the outer edge of the impeller, and the gas-liquid mixture enters the gas-liquid separation chamber. At this time, due to the sudden decrease in flow rate, the lighter gas is separated from the mixed gas and liquid, and the gas continues to rise and discharge through the pump body outlet. The degassed liquid returns to the liquid storage chamber and enters the impeller again through the reflux hole, and mixes again with the gas sucked from the suction pipeline inside the impeller, and flows to the outer edge of the impeller under the action of the high-speed rotating impeller. As this process goes on over and over again, the air in the suction pipeline continues to decrease until the gas is sucked out and the self-priming process is completed, and the pump is put into normal operation.

[0003] However, during the self-priming process of the horizontal self-priming pump, after the gas forms a gas-liquid mixture in the pump's inlet flow channel, it flows out through the outlet section where the pump body's partition tongue is located, enters the pump body's gas-liquid separation chamber, discharges the gas, and returns to the impeller flow channel after liquid separation to continue working until the gas is exhausted and self-priming is achieved. In order to more effectively discharge the gas-liquid mixture, the designer generally controls the gap between the impeller blades and the pump body's partition tongue to be very small, which causes a large reaction force when the tip of the impeller blade passes through the pump body's partition tongue, resulting in excessive radial force, causing large vibration of the pump, severely shortening the life of the pump's mechanical seal, and causing large noise during pump operation that affects the environment. Utility Model Content

[0004] In view of the defects of the prior art, the utility model provides an open impeller guide structure for a horizontal self-priming pump, which is provided with a wear-resistant plate and a guide component. The impeller cooperates with the wear-resistant plate and the guide component, and more than two arc-shaped guide vanes are provided on the guide component to form a guide vane channel, so as to facilitate the discharge of the gas-liquid mixture to the edge of the impeller, reduce the vibration of the impeller, extend the service life of the impeller, and reduce noise.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is an open impeller guide structure for a horizontal self-priming pump, including an impeller body and a guide component; the impeller body includes a connecting portion for connecting to a main shaft, and the impeller body rotates to form an impeller flow channel; the guide component includes a guide plate body coaxially arranged with the impeller body and two arc-shaped guide vanes arranged in the circumferential direction of the guide plate body, the two arc-shaped guide vanes are both arranged on the outside of the impeller body, and the two arc-shaped guide vanes are staggered in the radial direction to form a guide vane channel between adjacent arc-shaped guide vanes, and a guide vane flow channel is formed on the outside of the arc-shaped guide vanes, the inlet of the guide vane channel is connected to the outlet of the impeller flow channel, and the outlet of the guide vane channel is connected to the guide vane flow channel.

[0006] Furthermore, the guide vane channel gradually contracts from the inlet to the outlet.

[0007] Based on the above technical solution, the medium can enter the inlet of the wider guide vane channel more smoothly, and flow along the guide vane channel to the outlet of the narrower guide vane channel for discharge. The inlet size can better collect the gas-liquid mixture.

[0008] Furthermore, the arc-shaped guide vane includes a first arc-shaped guide vane and a second arc-shaped guide vane, and the first arc-shaped guide vane and the second arc-shaped guide vane are evenly distributed in the circumferential direction of the guide plate body.

[0009] Based on the above technical solution, the two guide vanes are evenly arranged, which can effectively balance the radial force and further reduce the vibration of the pump.

[0010] Further, the first arc-shaped guide vane has a first arc-shaped segment and a second arc-shaped segment which are separated from each other, the second arc-shaped guide vane has a third arc-shaped segment and a fourth arc-shaped segment which are separated from each other, a first guide vane channel is formed between the first arc-shaped segment and the third arc-shaped segment, and a second guide vane channel is formed between the second arc-shaped segment and the fourth arc-shaped segment;

[0011] The first arc segment is arranged outside the third arc segment, and the end of the third arc segment is offset toward the center of the guide plate body; the second arc segment is arranged inside the fourth arc segment, and the end of the second arc segment is offset toward the center of the guide plate body.

[0012] Based on the above technical solution, the guide vane is inclined toward the center of the circle so that the inlet area is large. This inclined guide vane shape can collect the gas-liquid mixture well. The radial size of the guide vane inlet can also be cut as needed, so that the guide vane inlet size varies with the impeller diameter. Impellers with different heads can use the same guide vane blank, further reducing costs.

[0013] Furthermore, an outer side wall of the first arc-shaped guide vane is provided with a lead-out portion, and the lead-out portion forms an outlet of the guide vane flow channel.

[0014] Furthermore, the outlet portion includes a convex portion bent from the outer side wall toward the outer edge of the guide plate body.

[0015] Based on the above technical solution, the streamlined structure of the outlet portion can reduce the impact and resistance of the medium on the first arc-shaped guide vane to a certain extent, which can not only improve the efficiency of discharging the medium, but also reduce vibration.

[0016] Furthermore, the open impeller guide structure includes a wear-resistant plate, and the end surface of the arc-shaped guide vane facing away from the guide plate body abuts against the wear-resistant plate to form a cavity between the wear-resistant plate and the guide plate body, and the impeller body is accommodated inside the cavity.

[0017] Furthermore, a wear-resistant plate return hole is provided on the wear-resistant plate near the outer diameter of the impeller flow channel, and the wear-resistant plate return hole is communicated with the impeller flow channel.

[0018] Based on the above technical solution, after the self-priming is completed and the pump works normally, because the pressure near the outlet of the impeller flow channel is relatively high, if the reflux hole is opened at the low pressure of the impeller flow channel, the reflux pressure difference during normal operation of the pump is large, the reflux amount is large, and the volume loss will be large. Setting the reflux hole of the wear-resistant plate near the outer diameter of the impeller flow channel can reduce the reflux liquid pressure difference and reduce the volume loss of the pump during normal operation.

[0019] Furthermore, the impeller body is an open impeller.

[0020] Based on the above technical solution, the impeller body uses an open impeller that is conducive to the full mixing of gas and liquid. The open impeller cooperates with the wear-resistant plate to form an impeller flow channel. Wear-resistant plate reflux holes are arranged on the wear-resistant plate near the outer diameter of the impeller flow channel. The number of wear-resistant plate reflux holes is designed according to the pump flow and exhaust volume requirements. The reflux point is located within the outlet of the impeller flow channel, so that the reflux liquid can achieve rapid gas-liquid mixing with the air in the impeller.

[0021] Furthermore, a mounting hole is provided on the deflector body.

[0022] Based on the above technical solution, the installation hole is provided to facilitate the detachable connection of the guide plate body with other structures, thereby facilitating the fixation and installation of the guide components, so that the operation of the entire device is more stable.

[0023] The beneficial effects of the utility model are as follows: two arc-shaped guide vanes are arranged in the circumferential direction of the outer side of the impeller body to form a guide vane channel on the outer side of the impeller body; the inlet of the guide vane channel collects the gas-liquid mixture, and the gas-liquid mixture is led out from the outlet of the guide vane channel, that is, the guide vane channel can guide the gas-liquid mixture from the impeller flow channel to the guide vane flow channel in a direction and regularly, so as to effectively reduce the vibration of the blade tip of the impeller body, thereby reducing the vibration of the pump, extending the service life of the pump, and reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural schematic diagram of an embodiment of the utility model when applied to a horizontal self-priming pump;

[0025] Figure 2 This is a schematic structural diagram of a flow guide component in one embodiment of the utility model;

[0026] Figure 3 A side view of a flow guide component in one embodiment of the utility model;

[0027] In the figure:

[0028] 100, impeller body, 110, connecting part,

[0029] 200, guide component, 210, guide plate body, 211, outer edge of the guide plate body, 212, mounting hole, 220, arc guide vane, 221, first arc guide vane, 2211, first arc segment, 2212, second arc segment, 2213, outlet, 222, second arc guide vane, 2221, third arc segment, 2222, fourth arc segment,

[0030] 300, wear-resistant plate, 310, wear-resistant plate return hole,

[0031] 10. Main shaft, 20. Pump body, 30. Pump cover, 40. Sealing assembly,

[0032] 5. impeller flow channel, 51. outlet of impeller flow channel, 6. guide vane channel, 61. inlet of guide vane channel, 62. outlet of guide vane channel, 7. guide vane flow channel, 8. liquid inlet flow channel. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0034] See also Figure 1 , shows an open impeller flow guide structure for a horizontal self-priming pump in one embodiment of the utility model, which includes an impeller body 100 and a flow guide component 200, which cooperate to guide the medium. In specific applications, Figure 1 The schematic diagram shows the structure of the impeller structure in this embodiment installed inside the pump body 20 . A liquid inlet channel 8 is provided inside the pump body 20 , and the liquid enters the pump body 20 through the liquid inlet channel 8 .

[0035] In this embodiment, the impeller body 100 of the impeller structure includes a connecting portion 110 for connecting to the main shaft 10. In a specific configuration, the main shaft 10 is connected to a driving device (not shown in the figure), and the driving device drives the main shaft 10 to rotate, thereby driving the impeller body 100 to rotate to form an impeller flow channel 5, and the medium enters the impeller flow channel 5 from the liquid inlet flow channel 8.

[0036] See also Figure 2 The guide component 200 includes a guide plate body 210 coaxially arranged with the impeller body 100 and two arc-shaped guide vanes 220 arranged in the circumferential direction of the guide plate body 210, that is, Figure 2 The first arc guide vane 221 and the second arc guide vane 222 are shown in the figure. Both arc guide vanes 220 are arranged outside the impeller body 100, and the two arc guide vanes 220 are staggered in the radial direction to form a guide vane channel 6 between adjacent arc guide vanes 220, and a guide vane flow channel 7 is formed outside the arc guide vanes 220. The inlet 61 of the guide vane channel is connected with the outlet 51 of the impeller flow channel, and the outlet 62 of the guide vane channel is connected with the guide vane flow channel 7. When the impeller body 100 rotates, the medium is guided from the guide vane channel 6 to the guide vane flow channel 7 through the impeller flow channel 5.

[0037] The impeller structure for the horizontal self-priming pump is provided with two arc-shaped guide vanes 220 in the outer circumferential direction of the impeller body 100 to form a guide vane channel 6 on the outer side of the impeller body 100. The inlet 61 of the guide vane channel collects the gas-liquid mixture and leads the gas-liquid mixture out from the outlet 62 of the guide vane channel, that is, the guide vane channel 6 can guide the gas-liquid mixture from the impeller flow channel 5 to the guide vane flow channel 7 in a directional and regular manner, so as to effectively reduce the vibration of the blade tip of the impeller body 100, thereby reducing the vibration of the pump, extending the service life of the pump, and reducing noise. In addition, the outlet 62 of the guide vane channel makes the liquid flow out more smoothly, speeds up the self-priming process, and thus can improve the efficiency of the horizontal self-priming pump.

[0038] In one embodiment, the guide vane channel 6 gradually contracts from the inlet 61 of the guide vane channel to the outlet 62 of the guide vane channel. In this way, the medium can more smoothly enter the inlet 61 of the guide vane channel with a wider size, and converge along the guide vane channel 6 to the outlet 62 of the guide vane channel with a narrower size for discharge. The guide vane is inclined toward the center of the circle so that the inlet area is large. This inclined guide vane shape can collect the gas-liquid mixture well. The radial size of the guide vane inlet can also be cut as needed, so that the guide vane inlet size varies with the impeller diameter, and the impellers with different heads can use the same guide vane blank.

[0039] In one embodiment, the arc guide vane 220 includes a first arc guide vane 221 and a second arc guide vane 222, and the first arc guide vane 221 and the second arc guide vane 222 are evenly distributed in the circumferential direction of the guide plate body 210. In this way, the first arc guide vane 221 and the second arc guide vane 222 evenly arranged in the circumferential direction can effectively collect the gas-liquid mixture and introduce the mixture into the guide vane channel 6. Preferably, in this embodiment, the two guide vanes are evenly arranged, which can effectively balance the radial force and further reduce the vibration of the pump. It should be noted that the even arrangement in this embodiment means that the first arc guide vane 221 and the second arc guide vane 222 have the same length and curvature, and the second arc guide vane 222 includes a structure in which the first arc guide vane 221 is rotated 180 degrees and then displaced in the diameter direction.

[0040] Continue to see Figure 2 In one embodiment, the first arc-shaped guide vane 221 has a first arc-shaped segment 2211 and a second arc-shaped segment 2212 which are separated from each other, and the second arc-shaped guide vane 222 has a third arc-shaped segment 2221 and a fourth arc-shaped segment 2222 which are separated from each other. A first guide vane channel is formed between the first arc-shaped segment 2211 and the third arc-shaped segment 2221, and a second guide vane channel is formed between the second arc-shaped segment 2212 and the fourth arc-shaped segment 2222; Figure 2 As shown, the first arc segment 2211 is arranged on the outside of the third arc segment 2221, and the end of the third arc segment 2221 is offset to the center of the guide plate body 210, so that the inlet size of the first guide vane channel is larger than the outlet size, that is, it gradually shrinks and converges from the inlet to the outlet, which is more conducive to collecting the gas-liquid mixture; the second arc segment 2212 is arranged on the inside of the second arc segment 2212, and the end of the second arc segment 2212 is offset to the center of the guide plate body 210, so that the inlet size of the second guide vane channel is larger than the outlet size, that is, it gradually shrinks and converges from the inlet to the outlet, which is more conducive to collecting the gas-liquid mixture.

[0041] In one embodiment, the outer wall of the first arc-shaped guide vane 221 is provided with an outlet portion 2213, and the outlet portion 2213 forms an outlet of the guide vane flow channel 7. In one embodiment, the outlet portion 2213 includes a convex portion bent from the outer wall toward the outer edge 211 of the guide plate body. In this embodiment, the streamlined structure of the outlet portion 2213 can reduce the impact and resistance of the medium on the first arc-shaped guide vane 221 to a certain extent, which can not only improve the efficiency of discharging the medium, but also reduce vibration.

[0042] In one embodiment, the open impeller guide structure includes a wear-resistant plate 300, and the end surface of the arc guide vane 220 facing away from the guide plate body 210 abuts against the wear-resistant plate 300 to form a cavity between the wear-resistant plate 300 and the guide plate body 210, and the impeller body 100 is accommodated inside the cavity.

[0043] In one embodiment, a wear-resistant plate reflux hole 310 is provided on the wear-resistant plate 300 near the outer diameter of the impeller flow channel 5, and the wear-resistant plate reflux hole 310 is connected to the impeller flow channel 5. After the self-priming is completed to make the pump work normally, because the pressure near the outlet 51 of the impeller flow channel is relatively high, if the reflux hole is opened at the low pressure of the impeller flow channel, the reflux pressure difference during normal operation of the pump is large, the reflux amount is large, and the volume loss will be large. In this embodiment, the wear-resistant plate reflux hole 310 is set on the wear-resistant plate 300 near the outer diameter of the impeller flow channel 5, which can reduce the reflux liquid pressure difference and reduce the pump volume loss during normal operation.

[0044] In one embodiment, the impeller body 100 is an open impeller. In this embodiment, the impeller body uses an open impeller that is conducive to full mixing of gas and liquid. The open impeller cooperates with the wear-resistant plate 300 to form an impeller flow channel 5. Wear-resistant plate reflux holes 310 are arranged on the wear-resistant plate 300 near the outer diameter of the impeller flow channel 5. The number of wear-resistant plate reflux holes 310 is designed according to the pump flow rate and exhaust volume requirements. The reflux point is located within the outlet 51 of the impeller flow channel, so that the reflux liquid can achieve rapid gas-liquid mixing with the air in the impeller.

[0045] In one embodiment, a mounting hole 212 is provided on the guide plate body 210. This arrangement facilitates the detachable connection of the guide plate body 210 with other structures, thereby facilitating the fixing and installation of the guide component 200, so that the entire device operates more stably.

[0046] In one embodiment, the pump body 20 is detachably connected to a pump cover 30 , the pump cover 30 is connected to the main shaft 10 via a sealing assembly 40 , and the main shaft 10 is connected to a driving device to drive the impeller body 100 to rotate.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

Claims

1. An open impeller flow guide structure for a horizontal self-priming pump, characterized in that: include An impeller body, comprising a connection portion for connecting to a main shaft, wherein the impeller body rotates to form an impeller flow channel; A flow guide component, comprising a flow guide plate body coaxially arranged with the impeller body and two arc-shaped guide vanes arranged in the circumferential direction of the flow guide plate body, the two arc-shaped guide vanes are arranged outside the impeller body, and the two arc-shaped guide vanes are staggered in the radial direction, so that a guide vane channel is formed between adjacent arc-shaped guide vanes, and a guide vane flow channel is formed outside the arc-shaped guide vanes, the inlet of the guide vane channel is communicated with the outlet of the impeller flow channel, and the outlet of the guide vane channel is communicated with the guide vane flow channel; The open impeller guide structure includes a wear-resistant plate, and the end surface of the arc-shaped guide vane facing away from the guide plate body abuts against the wear-resistant plate to form a cavity between the wear-resistant plate and the guide plate body, and the impeller body is accommodated inside the cavity; the wear-resistant plate is provided with a wear-resistant plate return hole near the outer diameter of the impeller flow channel, and the wear-resistant plate return hole is connected to the impeller flow channel.

2. The open impeller flow guide structure for a horizontal self-priming pump according to claim 1, characterized in that: The guide vane channel gradually contracts from the inlet to the outlet.

3. The open impeller flow guide structure for a horizontal self-priming pump according to claim 1, characterized in that: The arc-shaped guide vanes include first arc-shaped guide vanes and second arc-shaped guide vanes, and the first arc-shaped guide vanes and the second arc-shaped guide vanes are evenly distributed in the circumferential direction of the guide plate body.

4. The open impeller flow guide structure for a horizontal self-priming pump according to claim 3, characterized in that: The first arc-shaped guide vane has a first arc-shaped segment and a second arc-shaped segment which are separated from each other, the second arc-shaped guide vane has a third arc-shaped segment and a fourth arc-shaped segment which are separated from each other, a first guide vane channel is formed between the first arc-shaped segment and the third arc-shaped segment, and a second guide vane channel is formed between the second arc-shaped segment and the fourth arc-shaped segment; The first arc segment is arranged outside the third arc segment, and the end of the third arc segment is offset toward the center of the guide plate body; the second arc segment is arranged inside the fourth arc segment, and the end of the second arc segment is offset toward the center of the guide plate body.

5. The open impeller flow guide structure for a horizontal self-priming pump according to claim 4, characterized in that: The outer side wall of the first arc-shaped guide vane is provided with a lead-out portion, and the lead-out portion forms an outlet of the guide vane flow channel.

6. The open impeller flow guide structure for a horizontal self-priming pump according to claim 5, characterized in that: The outlet portion includes a convex portion bent from the outer side wall toward the outer edge of the guide plate body.

7. An open impeller flow guide structure for a horizontal self-priming pump according to any one of claims 1 to 6, characterized in that: The impeller body is an open impeller.

8. An open impeller flow guide structure for a horizontal self-priming pump according to any one of claims 1 to 6, characterized in that: The guide plate body is provided with a mounting hole.

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