A slurry pump with an automatic cleaning function

Abstract

The present invention discloses a slurry pump with an automatic cleaning function. The method comprises the following steps: providing an intercepting plate at the discharge end of the pump body, the intercepting plate being semi-annular and adapted to the junction of the straight pipe part and the curved pipe part of the pump body; a plurality of cavities are provided inside the intercepting plate, a reset spring is installed on the top of the cavity, the other end of the reset spring is connected to a slider, the bottom of the slider is connected to an intercepting needle, the intercepting needle passes through the intercepting plate and can slide up and down; a limit bin is provided on the side wall of the cavity, a spring piece is fixedly connected to the inner wall of the limit bin, and the end of the spring piece is connected to the limit head; the intercepting needle can automatically collect flexible impurities in the slurry, and when the intercepted flexible impurities reach a certain amount, the intercepting needle and the slider move upward under the impact of the slurry, and the intercepted flexible impurities are separated from the intercepting needle and discharged from the pump body, thereby achieving the effect of collecting flexible impurities and automatically discharging impurities, and effectively preventing the flexible impurities from accumulating in the slurry pump and affecting the working performance of the slurry pump.

Description

Technical Field

[0001] The present invention relates to the field of slurry pumps, in particular to a slurry pump with an automatic cleaning function. Background Art

[0002] Slurry pumps are centrifugal pumps, primarily suitable for conveying high-lift slurries from zinc hydrometallurgy, where corrosion, wear, high temperatures, cavitation, and erosion are common. Existing slurry pumps are mostly made of cast iron or stainless steel. They utilize centrifugal force to increase the energy of the solid-liquid mixture, converting electrical energy into kinetic and potential energy, thereby pumping the slurry within the pipeline.

[0003] However, in actual use of the existing slurry pump, when flexible materials such as rubber, cotton, and plastic cloth are mixed into the slurry, after the slurry containing these flexible materials flows through the slurry pump for a long time, some of the flexible materials in the slurry are prone to accumulate in the flow-through components or impeller flow channels of the slurry pump, which may seriously cause the slurry pump to shut down. Especially in the pump body with a volute structure, when some of the flexible materials in the slurry flow to the outlet position after acceleration, they are prone to get hung at the junction of the vertical part and the curved part of the volute, or they cannot be discharged smoothly after entering the volute again, resulting in the accumulation of flexible impurities in the pump body, which seriously affects the normal operation of the slurry pump.

[0004] The Chinese patent with the relevant announcement number CN216518657U discloses a slurry pump with a slurry drainage function, which has an automatic drainage structure at the output port of the slurry pump. A drainage pin is used to pass through the drainage hole to push the debris at the output port, so that it is discharged from the slurry pump along with the slurry, which plays a certain dredging role. However, the drainage pin extending from the drainage hole can often only drain hard and agglomerated debris. When it pushes against a flexible material, it often cannot achieve the drainage effect due to the certain deformation of the flexible material. In addition, the radially extended drainage pin is also easily hit by the hard particles in the high-speed flowing slurry and cannot be retracted smoothly, causing damage to the sewage discharge structure. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a slurry pump with an automatic cleaning function to solve the technical problem that the slurry pump in the prior art is difficult to avoid the accumulation of flexible impurities in the pump body during actual use.

[0006] A slurry pump with automatic cleaning function, the slurry pump includes a front housing 1 and a rear housing 2, the rear end of the rear housing 2 is fixedly connected to the pump shaft box 16, the pump shaft runs through the pump shaft box 16, the pump shaft passes through the rear housing 2 and is connected to the impeller, the front housing 1 is provided with a liquid inlet; a pump body 3 is arranged between the front housing 1 and the rear housing 2, the pump body 3 is in the shape of a volute, and a blocking plate 7 is fixed to the discharge end of the pump body 3, the blocking plate 7 is semi-annular and is adapted to the junction of the straight pipe part and the curved pipe part of the pump body 3; a plurality of cavities are provided inside the blocking plate 7, a return spring 13 is installed at the top of the cavity, the other end of the return spring 13 is connected to the slider 9, the bottom of the slider 9 is connected to the blocking needle 8, the blocking needle 8 passes through the blocking plate 7 and can slide up and down; a limit bin 10 is provided on the side wall of the cavity, and a spring 11 is fixedly connected to the inner wall of the limit bin 10, and the end of the spring 11 is connected to the limit head 12.

[0007] During operation, the above-mentioned slurry pump can intercept flexible impurities in the slurry through the blocking needle. When the flexible impurities reach a certain amount, the impact force on the blocking needle becomes greater, causing the slider to push the limit head upward. When the slider moves upward, it drives the blocking needle upward, so that the flexible impurities break away from the blocking needle and are discharged from the pump body.

[0008] Furthermore, the top end of the limiting head 12 is an arc surface, and the bottom end is a flat surface.

[0009] Furthermore, a guide bar 14 is provided in the cavity, and the slider 9 can slide up and down along the guide bar 14 .

[0010] Furthermore, the bottom end of the blocking plate 7 is an inclined surface.

[0011] Furthermore, the blocking needles 8 are arranged with the middle one being shorter and the two sides being longer.

[0012] The present invention is further configured such that a front guard plate 4 is provided between the pump body 3 and the front shell 1, a mounting ring 5 is fixedly connected to the front guard plate 4, a blocking bar 6 is fixed on the mounting ring 5, the blocking bars 6 are distributed in a ring-shaped manner on the mounting ring 5, and the blocking bars 6 are arc-shaped and the arc-shaped part is facing the direction of the slurry source.

[0013] Furthermore, the barrier bar 6 is connected to the mounting ring 5 via elastic legs 61 .

[0014] Furthermore, the elastic legs 61 are spring steel sheets.

[0015] Furthermore, a cutting edge 62 is provided on the top of the barrier bar 6 .

[0016] Furthermore, a mounting seat 15 is connected to the bottom end of the pump shaft box 16 .

[0017] Furthermore, an adjusting screw 17 is provided at the middle position of the front end of the mounting seat 15 .

[0018] Furthermore, the part of the slurry pump that contacts the slurry is made of sintered ceramics of silicon nitride combined with silicon carbide, making it suitable for media with strong abrasiveness and high solid content.

[0019] In summary, the present invention mainly has the following beneficial effects:

[0020] 1. The present invention provides a blocking plate for collecting flexible impurities at one end of the output port of the slurry pump. When the flexible impurities move in the pump body, the part of the flexible impurities that is not discharged from the pump body in time will be intercepted by the blocking needles on the blocking plate, effectively preventing the flexible impurities from accumulating in the pump body and being entangled on the impeller. At the same time, the blocking needle will automatically discharge the impurities after intercepting a certain amount of flexible impurities, and discharge the intercepted and collected flexible impurities out of the pump body, which can further prevent the accumulation of flexible impurities at the output end of the pump body, thereby achieving the effect of collecting and automatically discharging flexible impurities, and effectively preventing the accumulation of impurities in the slurry pump and affecting the working performance of the slurry pump;

[0021] 2. The present invention arranges a mounting ring and a blocking bar on the inner wall of the front guard plate. The blocking bar can hook longer flexible impurities, and then cut and split the longer flexible impurities under the impact of high-speed flowing particles in the slurry, effectively reducing the accumulation and transportation of longer flexible impurities in the pump body; the setting of the cutting edge further improves the efficiency of cutting and splitting longer flexible impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A perspective view of a slurry pump according to the present invention;

[0023] Figure 2 This is an internal stereoscopic view of the slurry pump of the present invention;

[0024] Figure 3 A three-dimensional diagram of the pump body of the present invention;

[0025] Figure 4 This is a three-dimensional view of the pump body from another perspective of the present invention;

[0026] Figure 5 A perspective view of a blocking plate according to the present invention;

[0027] Figure 6 A three-dimensional view of the barrier plate of the present invention from another perspective;

[0028] Figure 7 This is a cross-sectional internal view of the blocking plate of the present invention:

[0029] Figure 8 For the present invention Figure 7 A partial enlarged schematic diagram;

[0030] Figure 9 A three-dimensional diagram of the limiting head and the spring piece of the present invention;

[0031] Figure 10 A perspective view of the front guard plate of the present invention;

[0032] Figure 11 A three-dimensional diagram of the mounting ring of the present invention;

[0033] Figure 12 It is an enlarged schematic diagram of the barrier strip of the present invention.

[0034] In the figure: 1. Front shell; 2. Rear shell; 3. Pump body; 4. Front guard plate; 5. Mounting ring; 6. Blocking bar; 61. Elastic support foot; 62. Cutting edge; 7. Blocking plate; 8. Blocking needle; 9. Slider; 10. Limiting bin; 11. Shrapnel; 12. Limiting head; 13. Return spring; 14. Guide strip; 15. Mounting seat; 16. Pump shaft box; 17. Adjusting screw. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0036] Example 1

[0037] A slurry pump with automatic cleaning function, which includes a front casing 1 and a rear casing 2. The rear end of the rear casing 2 is fixedly connected to the pump shaft box 16. A pump shaft runs through the pump shaft box 16, and the pump shaft passes through the rear casing 2 and is connected to the impeller. A liquid inlet is provided on the front casing 1; a pump body 3 is provided between the front casing 1 and the rear casing 2. The pump body 3 is in the shape of a volute. A blocking plate 7 is fixed to the discharge end of the pump body 3. The blocking plate 7 is semi-annular and is adapted to the junction of the straight pipe part and the curved pipe part of the pump body 3. The bottom end of the blocking plate 7 is Slanted surface; a plurality of cavities are provided inside the blocking plate 7, a return spring 13 is installed on the top of the cavity, the other end of the return spring 13 is connected to the slider 9, a guide bar 14 is provided in the cavity, the slider 9 can slide up and down along the guide bar 14, the bottom of the slider 9 is connected to the blocking needle 8, the blocking needle 8 passes through the blocking plate 7 and can slide up and down; a limit bin 10 is provided on the side wall of the cavity, and a spring piece 11 is fixedly connected to the inner wall of the limit bin 10, and the end of the spring piece 11 is connected to the limit head 12, the top of the limit head 12 is an arc surface, and the bottom end is a plane.

[0038] During operation, the above-mentioned slurry pump can intercept flexible impurities in the slurry through the blocking needle. When the flexible impurities reach a certain amount, the impact force on the blocking needle becomes greater, causing the slider to push the limit head upward. When the slider moves upward, it drives the blocking needle upward, so that the flexible impurities are separated from the blocking needle and discharged from the pump body; the setting of the guide strip can prevent the slider and the blocking needle from getting stuck; the bottom end of the blocking plate is set as an inclined surface, which can make the flexible impurities that have separated from the blocking needle move upward along the inclined surface, avoiding the flexible impurities from being re-involved in the pump body; the setting of the limit head with an arc surface at the top and a flat surface at the bottom can make the force required to move the slider and the blocking needle upward greater, and the force required to reset smaller.

[0039] Example 2

[0040] Furthermore, on the basis of Example 1, the blocking needles 8 are arranged in a manner of being shorter in the middle and longer on both sides.

[0041] Because the central portion of the interceptor plate has a large interception and filtration area for slurry, it easily collects more flexible impurities, and the slurry flows quickly, subjecting it to greater impact force. However, the interception and filtration areas on the sides are smaller, resulting in poor filtration efficiency and slower slurry flow. Shortening the central interceptor pin can reduce the impact force on flexible impurities after entanglement, effectively preventing deformation and thus extending its service life. Lengthening the interceptor pins on both sides can improve filtration efficiency.

[0042] Example 3

[0043] Furthermore, on the basis of Example 1, a front guard plate 4 is provided between the pump body 3 and the front shell body 1, and a mounting ring 5 is fixedly connected inside the front guard plate 4, and a blocking bar 6 is fixed on the mounting ring 5. The blocking bars 6 are distributed in a ring-shaped manner on the mounting ring 5, and the blocking bars 6 are arc-shaped and the arc-shaped part faces the direction of the slurry source. The blocking bar 6 is connected to the mounting ring 5 through an elastic support foot 61, and the elastic support foot 61 is preferably a spring steel sheet, and a cutting edge 62 is provided on the top of the blocking bar 6.

[0044] The setting of the elastic support feet can make the barrier bar have a certain elastic deformation, which can prevent the barrier bar from being damaged by hard impurities; the setting of the cutting edge can cut the flexible impurities moving at high speed into pieces, thereby improving the efficiency of discharging them from the pump body, and is especially effective for longer flexible impurities.

[0045] The slurry pump can be positioned by the mounting base 15 connected to the bottom end of the pump shaft box 16. An adjusting screw 17 is provided at the middle position of the front end of the mounting base 15, and the inclination angle of the rear housing can be adjusted by adjusting the screw to achieve the purpose of conveniently fine-tuning the direction of the liquid inlet end of the slurry pump.

[0046] The part of the slurry pump that contacts the slurry is made of sintered ceramics of silicon nitride combined with silicon carbide, making it suitable for media with strong abrasiveness and high solid content.

[0047] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A slurry pump with automatic cleaning function, characterized by: The slurry pump comprises a front casing and a rear casing, the rear end of the rear casing is fixedly connected to the pump shaft box, the pump shaft passes through the pump shaft box, the pump shaft passes through the rear casing and is connected to the impeller, and the front casing is provided with a liquid inlet; a pump body is provided between the front casing and the rear casing, the pump body is in the shape of a volute, and an blocking plate is fixed to the discharge end of the pump body, the blocking plate is semi-annular and is adapted to the junction of the straight pipe part and the curved pipe part of the pump body; a number of cavities are provided inside the blocking plate, a return spring is installed at the top of the cavity, the other end of the return spring is connected to a slider, the bottom of the slider is connected to an blocking needle, the blocking needle passes through the blocking plate and can slide up and down; a limit bin is provided on the side wall of the cavity, and a spring is fixedly connected to the inner wall of the limit bin, and the end of the spring is connected to a limit head; The top end of the limit head is a curved surface, and the bottom end is a flat surface; The bottom end of the blocking plate is an inclined surface.

2. The slurry pump with automatic cleaning function according to claim 1, characterized in that: A guide bar is provided in the cavity, and the slider can slide up and down along the guide bar.

3. The slurry pump with automatic cleaning function according to claim 1, characterized in that: The blocking needles are arranged with the middle one being shorter and the two sides being longer.

4. The slurry pump with automatic cleaning function according to claim 1, characterized in that: A front guard plate is provided between the pump body and the front shell, a mounting ring is fixedly connected inside the front guard plate, a blocking bar is fixed on the mounting ring, the blocking bars are distributed in a ring-shaped manner on the mounting ring, the blocking bars are arc-shaped and the arc-shaped part faces the direction of the slurry source.

5. The slurry pump with automatic cleaning function according to claim 4, characterized in that: The barrier strip is connected to the mounting ring via elastic legs.

6. The slurry pump with automatic cleaning function according to claim 5, characterized in that: The elastic supporting feet are spring steel sheets.

7. The slurry pump with automatic cleaning function according to claim 4, characterized in that: A cutting edge is provided on the top of the barrier strip.

8. The slurry pump with automatic cleaning function according to any one of claims 1 to 7, characterized in that: The part of the slurry pump that contacts the slurry is made of sintered ceramics composed of silicon nitride and silicon carbide.

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