Horizontal self-priming pump

Abstract

The invention relates to the technical field of self-priming pumps, in particular to a horizontal self-priming pump which comprises a pump body, a wear-resisting plate, a flow guide component, a shaft and an impeller. The wear-resisting plate is arranged at an outlet of the liquid inlet runner; the flow guide component comprises a flow guide plate body and more than two arc-shaped guide vanes which are uniformly distributed in the circumferential direction of the flow guide plate body, the arc-shaped guide vanes are arranged in a staggered manner, a guide vane channel is formed between every two adjacent arc-shaped guide vanes, an inlet of each guide vane channel is communicated with the liquid inlet runner, and an outlet of each guide vane channel is communicated with the gas-liquid separation cavity; the shaft extends into the pump body and is connected with a driving device; the impeller is connected with the shaft, is arranged between the wear-resisting plate and the guide plate body and is located on the inner side of the arc-shaped guide vane, and the impeller rotates to lead fluid in the liquid inlet flow channel to the tip end of the impeller and send the fluid to the gas-liquid separation cavity through the guide vane channel. Gas-liquid mixtures can be discharged easily, vibration of the pump is reduced, the service life of the pump is prolonged, and noise is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of self-priming pumps, and particularly to a horizontal self-priming pump. Background Art

[0002] Self-priming pumps have the advantages of compact structure, convenient operation, stable operation, easy maintenance, high efficiency, long service life, etc. After a self-priming pump is normally started, 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 and flows towards the outer edge of the impeller. A white foam belt with a certain thickness and a high-speed rotating liquid ring are formed on the outer edge of the impeller. The gas-liquid mixture enters the gas-liquid separation chamber. At this time, due to the sudden decrease in flow velocity, the lighter gas is separated from the gas-liquid mixture, and the gas continues to rise and is discharged through the pump body discharge port. The degassed liquid returns to the liquid storage chamber and enters the impeller again through the return hole, and is mixed with the gas sucked from the suction pipeline inside the impeller again. Under the action of the high-speed rotating impeller, it flows towards the outer edge of the impeller again. As this process continues cyclically, the air in the suction pipeline is continuously reduced until all the gas is sucked out, completing the self-priming process, and the pump then enters normal operation.

[0003] However, during the self-priming process of a horizontal self-priming pump, after a gas-liquid mixture is formed in the liquid inlet flow channel of the pump, it flows out through the outlet section where the pump body tongue is located, enters the gas-liquid separation chamber of the pump body, the gas is discharged, and the separated liquid returns to the impeller flow channel to continue working until all the gas is exhausted to achieve self-priming. In order to more effectively discharge the gas-liquid mixture, designers generally control the gap between the impeller blades and the pump body tongue to be very small, which causes a large reaction force when the tip of the impeller blade passes through the pump body tongue, resulting in excessive radial force, causing large vibration of the pump, severely shortening the service life of the mechanical seal of the pump, and the pump running with a large noise, affecting the environment. Summary of the Invention

[0004] In view of the defects of the prior art, the present invention provides a horizontal self-priming pump, which is provided with a wear-resistant plate and a guiding component. The impeller is arranged between the wear-resistant plate and the guiding plate body, and two or more arc-shaped guide vanes are arranged on the guiding component to form a guide vane channel, so as to facilitate the discharge of the gas-liquid mixture, reduce the vibration of the pump, extend the service life of the pump, and reduce the noise.

[0005] To achieve the above object, the technical solution provided by the present invention is a horizontal self-priming pump, which includes a pump body, a wear-resistant plate, a flow guiding component, a shaft, and an impeller. The pump body is provided with a liquid inlet flow channel; the wear-resistant plate is arranged at the outlet of the liquid inlet flow channel; the flow guiding component is arranged on the wear-resistant plate, and the flow guiding component includes a flow guiding plate body and two or more evenly distributed arc-shaped guide vanes arranged in the circumferential direction of the flow guiding plate body. The arc-shaped guide vanes are arranged in a staggered manner to form a guide vane channel between adjacent arc-shaped guide vanes. The inlet of the guide vane channel is communicated with the liquid inlet flow channel, and the outlet of the guide vane channel is communicated with the gas-liquid separation chamber; the shaft extends into the pump body, and the shaft is connected with a driving device; the impeller is connected with the shaft, and the impeller is arranged between the wear-resistant plate and the flow guiding plate body and is located inside the arc-shaped guide vanes. The impeller rotates to lead the fluid in the liquid inlet flow channel to the tip of the impeller and send it to the gas-liquid separation chamber through the guide vane channel.

[0006] Further, a cut-off tongue part is provided at the outlet of the liquid inlet flow channel, and the cut-off tongue part and the wear-resistant plate enclose to form a flow guiding chamber.

[0007] Further, a wear-resistant plate return hole is opened at the wear-resistant plate near the tip of the impeller. One side of the wear-resistant plate return hole is communicated with the flow guiding chamber, and the other side of the wear-resistant plate return hole is communicated with the cavity inside the arc-shaped guide vanes.

[0008] 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 return hole is opened at the low-pressure part of the impeller flow channel, the return pressure difference during the normal operation of the pump is relatively large, the return flow is relatively large, and the volumetric loss will be very large. Setting the wear-resistant plate return hole at the wear-resistant plate near the outer diameter of the impeller flow channel can reduce the return liquid pressure difference and reduce the volumetric loss of the pump during normal operation.

[0009] Further, a pump body return hole is opened at the bottom of the cut-off tongue part of the pump body. One side of the pump body return hole is communicated with the gas-liquid separation chamber, and the other side of the pump body return hole is communicated with the flow guiding chamber.

[0010] Based on the above technical solution, a pump body return hole is arranged at the low point at the lower end of the pump body. The liquid separated in the gas-liquid separation chamber can pass through the pump body return hole at the bottom and re-enter the impeller flow channel through the flow guiding chamber to participate in the self-priming cycle. That is, the pump body return hole re-introduces the pressurized medium from the lower end of the pump body into the impeller flow channel to reduce the gas content in the return medium and achieve rapid self-priming.

[0011] Further, the guide vane channel gradually contracts from the inlet to the outlet.

[0012] Further, the impeller is an open impeller.

[0013] Based on the above technical solution, the horizontal self-priming pump is provided with an open impeller which 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 impeller flow channel outlet, so that the reflux liquid can achieve rapid gas-liquid mixing with the air in the impeller.

[0014] 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.

[0015] 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.

[0016] Further, the first arc-shaped guide vane has a first end and a second end facing away from each other, the second arc-shaped guide vane has a third end and a fourth end facing away from each other, a first guide vane channel is formed between the first end and the third end, and a second guide vane channel is formed between the second end and the fourth end.

[0017] The first end is arranged on the outside of the third end, and the third end is offset toward the center of the guide plate body; the second end is arranged on the inside of the fourth end, and the second end is offset toward the center of the guide plate body.

[0018] 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. The same guide vane blank can be used for impellers with different heads.

[0019] Furthermore, the arc-shaped guide vane abuts against the wear-resistant plate.

[0020] Furthermore, the pump body is detachably connected to a pump cover, the pump cover is connected to the shaft, and the shaft is connected to a driving device to drive the impeller to rotate.

[0021] Advantages of the present invention: In the horizontal self-priming pump of the present invention, two or more evenly distributed arc-shaped guide vanes are arranged in the circumferential direction on the outer side of the impeller to form a guide vane channel outside the impeller. The inlet of the guide vane channel collects the gas-liquid mixture and leads out the gas-liquid mixture from the outlet. That is, the guide vane channel can direct the gas-liquid mixture from the liquid inlet channel to the gas-liquid separation cavity in a directional and regular manner, effectively reducing the vibration at the tip of the impeller, thereby reducing the vibration of the pump, extending the service life of the pump, and reducing noise. Moreover, the evenly distributed arc-shaped guide vanes can effectively balance the radial force of the impeller, making the pump operate smoothly. In addition, the outlet of the guide vane channel makes the liquid outflow smoother, accelerating the self-priming process, and thus improving the efficiency of the pump. Brief Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of a horizontal self-priming pump in an embodiment of the present invention; Figure 2 It is a partial enlarged view of the position of the guide vane component and the impeller in an embodiment of the present invention; Figure 3 It is a schematic structural diagram of a guide vane component in an embodiment of the present invention; Figure 4 It is a side view of the guide vane component in an embodiment of the present invention; In the figure: 100, pump body, 110, liquid inlet channel, 111, outlet, 120, tongue part, 121, pump body return hole, 130, pump cover, 140, sand cleaning hole, 200, wear-resistant plate, 210, wear-resistant plate return hole, 300, guide vane component, 310, guide vane plate body, 320, arc-shaped guide vane, 321, first arc-shaped guide vane, 3211, first end, 3212, second end, 3213, lead-out part, 322, second arc-shaped guide vane, 3221, third end, 3222, fourth end, 400, shaft, 500, impeller, 600, sealing assembly, a, guide vane channel, a1, first guide vane channel, a2, second guide vane channel, b, gas-liquid separation cavity, c, diversion cavity, d, cavity, e, impeller flow channel, f, guide vane flow channel. Detailed Embodiments

[0023] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0024] See Figure 1 and Figure 2 , which shows a schematic structural diagram of a horizontal self-priming pump in an embodiment of the present invention. It includes a horizontal self-priming pump, which includes a pump body 100, a wear-resistant plate 200, a flow guiding component 300, a shaft 400, and an impeller 500. The impeller 500, the wear-resistant plate 200, and the flow guiding component 300 are arranged inside the pump body 100, and the impeller 500 is installed on the shaft 400. The pump body 100 is provided with a liquid inlet flow channel 110; the wear-resistant plate 200 is arranged at the outlet 111 of the liquid inlet flow channel 110; the flow guiding component 300 includes a flow guiding plate body 310 and two or more evenly distributed arc-shaped guide vanes 320 arranged in the circumferential direction of the flow guiding plate body 310. In this embodiment, a way of arranging two arc-shaped guide vanes 320 is shown. The arc-shaped guide vanes 320 are arranged in a staggered manner to form a guide vane channel a between adjacent arc-shaped guide vanes 320. The inlet of the guide vane channel a is communicated with the liquid inlet flow channel 110, and the outlet of the guide vane channel a is communicated with the gas-liquid separation chamber b; the shaft 400 extends into the pump body 100, and the shaft 400 is connected with a driving device; the impeller 500 is connected with the shaft 400, and the impeller 500 is arranged between the wear-resistant plate 200 and the flow guiding plate body 310 and inside the arc-shaped guide vanes 320. The impeller 500 rotates to lead the fluid in the liquid inlet flow channel 110 to the tip of the impeller 500 and send it to the gas-liquid separation chamber b through the guide vane channel a.

[0025] The above horizontal self-priming pump is provided with two or more arc-shaped guide vanes 320 in the circumferential direction on the outer side of the impeller 500 to form a guide vane channel a on the outer side of the impeller 500. The inlet of the guide vane channel a collects the gas-liquid mixture and leads out the gas-liquid mixture from the outlet. That is, the guide vane channel a can direct the gas-liquid mixture from the liquid inlet flow channel 110 to the gas-liquid separation chamber b in a directional and regular manner, so as to effectively reduce the vibration at the tip of the impeller 500, thereby reducing the vibration of the pump, prolonging the service life of the pump, and reducing noise. In addition, the outlet of the guide vane channel a makes the liquid flow out more smoothly, speeds up the self-priming process, and thus can improve the efficiency of the pump.

[0026] In an embodiment, a tongue partition 120 is provided at the outlet 111 of the liquid inlet flow channel 110, and the tongue partition 120 and the wear-resistant plate 200 enclose to form a flow guiding chamber c.

[0027] See Figure 1 and Figure 2, in one embodiment, a wear-resistant plate return hole 210 is provided near the tip of the impeller on the wear-resistant plate 200. The location near the tip of the impeller is the outer diameter of the impeller flow path e. One side of the wear-resistant plate return hole 210 communicates with the diversion cavity c, and the other side of the wear-resistant plate return hole 210 communicates with the cavity d inside the arc-shaped guide vane 320. After the self-priming is completed and the pump operates normally, since the pressure near the outlet of the impeller flow path e is relatively high, if the return hole is opened at the low-pressure part of the impeller flow path e, the return pressure difference during the normal operation of the pump is relatively large, the return flow rate is relatively large, and the volumetric loss will be very large. In this embodiment, the wear-resistant plate return hole 210 is provided on the wear-resistant plate 200 near the outer diameter of the impeller flow path e, which can reduce the return liquid pressure difference and reduce the pump volumetric loss during normal operation.

[0028] See Figure 1 and Figure 2 , in one embodiment, a pump body return hole 121 is provided at the bottom of the tongue portion 120 of the pump body 100. One side of the pump body return hole 121 communicates with the gas-liquid separation cavity b, and the other side of the pump body return hole 121 communicates with the diversion cavity c. In this embodiment, a pump body return hole 121 is provided at the lowest point at the lower end of the pump body 100. The liquid separated inside the gas-liquid separation cavity b can pass through the pump body return hole 121 at the bottom, re-enter the impeller flow path e through the diversion cavity c, and participate in the self-priming cycle. That is, the pump body return hole 121 re-introduces the pressurized medium from the lower end of the pump body 100 into the impeller flow path e to reduce the gas content in the return medium and achieve rapid self-priming. Specifically, when setting, the size of the return hole can be controlled according to the design requirements, and the hole opening can be completed.

[0029] See Figure 3 and Figure 4 , in one embodiment, the guide vane passage a gradually contracts from the inlet to the outlet. With this setting, the medium can enter the inlet of the guide vane passage a with a wider size more smoothly, and converge along the guide vane passage a to be discharged from the outlet of the guide vane passage a with a narrower size, which is beneficial to collecting the gas-liquid mixture.

[0030] See Figure 1 and Figure 3 , in one embodiment, the impeller 500 is an open impeller. In this embodiment, the horizontal self-priming pump is provided with an open impeller that is beneficial to the full mixing of gas and liquid. The open impeller and the wear-resistant plate 200 cooperate to form an impeller flow path. A wear-resistant plate return hole 210 is provided on the wear-resistant plate 200 near the outer diameter of the flow path of the impeller 500. The number of the wear-resistant plate return holes 210 is designed according to the pump flow rate and gas discharge requirements. The return point is located within the impeller flow path outlet, allowing the return liquid to achieve rapid gas-liquid mixing with air inside the impeller.

[0031] See Figure 3 and Figure 4, in one embodiment, the arc-shaped guide vane 320 includes a first arc-shaped guide vane 321 and a second arc-shaped guide vane 322, and the first arc-shaped guide vane 321 and the second arc-shaped guide vane 322 are evenly distributed in the circumferential direction of the deflector body 310. With such an arrangement, the first arc-shaped guide vane 321 and the second arc-shaped guide vane 322 evenly arranged in the circumferential direction can effectively collect the gas-liquid mixture and introduce the mixture into the guide vane channel a and the gas-liquid separation chamber b of the pump body. 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-shaped guide vane 321 and the second arc-shaped guide vane 322 have the same length and radian, and the second arc-shaped guide vane 322 includes the structure after the first arc-shaped guide vane 321 rotates 180 degrees and is offset in the diameter direction.

[0032] See Figure 3 and Figure 4 , in one embodiment, the first arc-shaped guide vane 321 has a first end 3211 and a second end 3212 facing away from each other, and the second arc-shaped guide vane 322 has a third end 3221 and a fourth end 3222 facing away from each other. A first guide vane channel a1 is formed between the first end 3211 and the third end 3221, and a second guide vane channel a2 is formed between the second end 3212 and the fourth end 3222, so that the inlet size of the first guide vane channel a1 is larger than the outlet size, that is, it gradually contracts and converges from the inlet to the outlet, which is more conducive to the collection of the gas-liquid mixture; the first end 3211 is arranged outside the third end 3221, and the third end 3221 is offset towards the center of the deflector body 310; the second end 3212 is arranged inside the fourth end 3222, and the second end 3212 is offset towards the center of the deflector body 310, so that the inlet size of the second guide vane channel a2 is larger than the outlet size, that is, it gradually contracts and converges from the inlet to the outlet, which is more conducive to the collection of the gas-liquid mixture.

[0033] It should be noted that the inclination of the guide vane towards the center of the circle results in a large inlet area. This inclined guide vane shape can well collect the gas-liquid mixture, and the radial dimension of the guide vane inlet can also be cut according to needs, so that the guide vane inlet size changes with the impeller diameter, and the same guide vane blank can be used for impellers with different head.

[0034] See Figure 2, a guide vane flow passage f is formed in the first arc-shaped guide vane 321 and the second arc-shaped guide vane 322. The guide vane flow passage f is communicated with the outlet of the guide vane passage a. In one embodiment, an outlet portion 3213 is provided on the outer side wall of the first arc-shaped guide vane 321. The outlet portion 3213 forms the outlet of the guide vane flow passage f, and the outlet of the guide vane flow passage f is communicated with the gas-liquid separation chamber b. In one embodiment, the outlet portion 3213 includes a convex portion that bends from the outer side wall to the outer edge of the deflector body 310. In this embodiment, the streamlined structure of the outlet portion 3213 can reduce the impact and resistance of the medium on the first arc-shaped guide vane 321 to a certain extent, which can not only improve the efficiency of discharging the medium but also reduce vibration.

[0035] Continue to refer to Figure 1 , in one embodiment, the pump body 100 is detachably connected with a pump cover 130. The pump cover 130 is connected to the shaft 400 through a sealing assembly 600. The shaft 400 is connected with a driving device (not shown in the figure) to drive the impeller 500 to rotate, and the rotation of the impeller 500 forms an impeller flow passage e.

[0036] In one embodiment, the arc-shaped guide vane 320 abuts against the wear-resistant plate 200. Specifically, when setting, the flow guiding component 300 is pressed by the pump cover 130, and the end surface of the arc-shaped guide vane 320 of the flow guiding component 300 on the side far from the deflector body 310 abuts against the wear-resistant plate 200.

[0037] As Figure 1 shown, in this embodiment, the shaft 400 extends into the pump body 100. The shaft 400 is connected with a driving device, which is horizontally installed and has a rear-pull structure, facilitating the disassembly of the rotor component for replacement and repair; the bearing component adopts a general standard design to improve the standardization degree of the pump; through the design of common parts and reasonable hydraulic planning, the standardization degree of the pump is improved.

[0038] Refer to Figure 1 , in one embodiment, since the structure of the pump body 100 is complex, a sand cleaning hole 140 is provided on the end surface of the pump body 100, and sand cleaning treatment can be carried out after the casting of the pump body 100 is completed.

[0039] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0041] In the present invention, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature. It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate 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 an intermediate element at the same time. The terms "vertical", "horizontal", "above", "below", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

Claims

1. Horizontal self-priming pump, characterized by: include The pump body is provided with a liquid inlet channel; A wear-resistant plate, arranged at the outlet of the liquid inlet channel; A guide component, comprising a guide plate body and two or more equally distributed arc guide vanes arranged in the circumferential direction of the guide plate body, wherein the arc guide vanes are staggered to form a guide vane channel between adjacent arc guide vanes, wherein the inlet of the guide vane channel is communicated with the liquid inlet flow channel, and the outlet of the guide vane channel is communicated with the gas-liquid separation chamber; A shaft extending into the pump body, the shaft being connected to a driving device; An impeller is connected to the shaft. The impeller is arranged between the wear-resistant plate and the guide plate body and is located inside the arc-shaped guide vane. The impeller rotates to guide the fluid in the liquid inlet channel to the tip of the impeller and delivers it to the gas-liquid separation chamber through the guide vane channel.

2. The horizontal self-priming pump according to claim 1, characterized in that: The outlet of the liquid inlet channel is provided with a tongue portion, and the tongue portion and the wear-resistant plate are surrounded to form a guide cavity.

3. The horizontal self-priming pump according to claim 2, characterized in that: The wear-resistant plate is provided with a wear-resistant plate return hole near the impeller tip, one side of the wear-resistant plate return hole is connected to the guide cavity, and the other side of the wear-resistant plate return hole is connected to the cavity inside the arc-shaped guide vane.

4. The horizontal self-priming pump according to claim 2, characterized in that: A pump body reflux hole is provided at the bottom of the partition tongue portion of the pump body, one side of the pump body reflux hole is communicated with the gas-liquid separation chamber, and the other side of the pump body reflux hole is communicated with the guide chamber.

5. The horizontal self-priming pump according to claim 1, characterized in that: The guide vane channel gradually contracts from the inlet to the outlet.

6. The horizontal self-priming pump according to claim 1, characterized in that: The impeller is an open impeller.

7. The 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.

8. The horizontal self-priming pump according to claim 7, characterized in that: The first arc-shaped guide vane has a first end and a second end facing away from each other, the second arc-shaped guide vane has a third end and a fourth end facing away from each other, a first guide vane channel is formed between the first end and the third end, and a second guide vane channel is formed between the second end and the fourth end; The first end is arranged on the outside of the third end, and the third end is offset toward the center of the guide plate body; the second end is arranged on the inside of the fourth end, and the second end is offset toward the center of the guide plate body.

9. The horizontal self-priming pump according to claim 1, characterized in that: The arc-shaped guide vane abuts against the wear-resistant plate.

10. The horizontal self-priming pump according to claim 1, characterized in that: The pump body is detachably connected to a pump cover, the pump cover is connected to the shaft, and the shaft is connected to a driving device to drive the impeller to rotate.

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