A durable ceramic pump

Abstract

The present invention relates to a durable ceramic pump, which includes a main shaft, a pump body and a bracket, the main shaft is rotatably connected with the bracket through a bearing, a mechanical seal is arranged on the main shaft between the bracket and the pump body, the pump body includes a pump casing and a main impeller and an auxiliary impeller arranged inside the pump casing, the main impeller is arranged at the shaft end of the main shaft, the auxiliary impeller is arranged on the main shaft between the mechanical seal and the main impeller, and the front and rear of the main impeller are respectively provided with a front guard plate and a rear guard plate, an inner hole is arranged on the rear guard plate, and the inner hole is sleeved on the main shaft, and there is a second gap with the main shaft, and the second gap is 5-300mm. The present invention realizes zero leakage of the ceramic pump during operation through mechanical sealing, improves the on-site environment, and at the same time, by increasing the inner hole diameter of the rear guard plate, the slag slurry can flow out from the inner hole of the rear guard plate when the pump is stopped, reducing the deposition of slurry in the pressure reducing cover and the rear guard plate, and adopts a mechanical seal to improve the sealing performance, ensure that the slag slurry has no leakage, reliable operation, and ensure the working efficiency of the ceramic pump.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic pumps, in particular to a durable ceramic pump. Background Art

[0002] Slurry pump refers to a kind of machine that increases the energy of solid-liquid mixed medium by centrifugal force (rotation of pump impeller), and converts electrical energy into kinetic energy and potential energy of the medium. It is mainly applicable to industries such as mining, power plants, dredging, metallurgy, chemical industry, building materials and petroleum.

[0003] The existing ceramic slurry pumps on the market are currently packed with seals, and water is passed through to seal the slurry. When in use, water will drip continuously, causing the site to be dirty and messy. When the pump is stopped, the slurry is deposited in the gap between the stuffing box and the rear guard plate. Since the outer diameter of the auxiliary impeller is relatively large and buried in the deposited slurry, it is difficult to start the pump and the motor is easily burned out. Existing ceramic pumps are generally used in high-abrasion conditions, with a short service life and frequent replacement of accessories. In addition, when repairing the slurry pump, on-site maintenance is more troublesome. The location of the slurry pump may be inconvenient, and it is necessary to manually pull the pulley and the fall chain to move the slurry pump. The slurry pump is heavy and requires more manpower. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a durable ceramic pump.

[0005] The present invention provides a durable ceramic pump adopting the following technical solution:

[0006] A durable ceramic pump comprises a main shaft, a pump body and a bracket, wherein the main shaft is rotatably connected to the bracket through a bearing, one end of the main shaft is drivingly connected to the pump body, and a mechanical seal is provided on the main shaft between the bracket and the pump body;

[0007] The pump body includes a pump casing and a main impeller and a secondary impeller arranged inside the pump casing, the main impeller is arranged at the shaft end of the main shaft, the secondary impeller is arranged on the main shaft between the mechanical seal and the main impeller, a front guard plate is arranged in front of the main impeller, and a rear guard plate is arranged behind the main impeller, the front guard plate, the rear guard plate and the pump casing form a cavity for accommodating the main impeller, the rear guard plate is provided with an inner hole, the inner hole is sleeved on the main shaft, and there is a second gap with the main shaft, and the second gap is 5-300mm.

[0008] By adopting the above technical solution, zero leakage of the ceramic pump during operation is achieved through mechanical sealing, which improves the on-site environment. At the same time, by increasing the inner hole diameter of the rear guard plate, the slag slurry can flow out from the inner hole of the rear guard plate when the pump is stopped, reducing the deposition of slurry in the pressure reducing cover and the rear guard plate.

[0009] Preferably, it also includes a combining plate and a sealing sleeve, the combining plate is arranged on the bracket, the rear guard plate is connected to the combining plate, a sealing sleeve is provided on the main shaft, a pressure reducing cover and a stationary ring seat are provided on the sealing sleeve, the outer edge of the pressure reducing cover is crimped between the combining plate and the rear guard plate, the front end of the pressure reducing cover is connected to the stationary ring seat, and a coolant space is formed between the stationary ring seat, the pressure reducing cover and the mechanical seal.

[0010] Preferably, the diameter of the auxiliary impeller is smaller than the diameter of the pressure reducing cover, there is a gap between the auxiliary impeller and the pressure reducing cover, the gap is 5-300 mm, and the first gap is connected to the second gap.

[0011] By adopting the above technical solution, the gap between the auxiliary impeller and the pressure reducing cover is enlarged, which makes it easier to start the pump. At the same time, the centrifugal force of the liquid flowing out through the auxiliary impeller is reduced, thereby reducing the scouring of the pressure reducing cover.

[0012] Preferably, the mechanical seal includes a dynamic ring, a static ring, a spring and a spring push ring, the static ring is connected to the static ring seat, the dynamic ring is arranged on the inner side of the static ring and connected to the sealing sleeve, the spring is arranged on the inner side of the dynamic ring, and the spring push ring is arranged between the dynamic ring and the spring.

[0013] By adopting the above technical solution, a mechanical seal is used, and the dynamic ring and the static ring are in close contact along the axial direction by a spring to achieve the sealing purpose, thereby improving the sealing performance, ensuring that the slag slurry does not leak, operating reliably, and ensuring the working efficiency of the ceramic pump.

[0014] Preferably, it also includes a mobile positioning device, which includes a universal wheel and a support plate. The lower end of the bracket is fixedly connected to a base plate, and a mounting plate is connected to the lower surface of the base plate. The mounting plate is connected to the support plate through a pneumatic cylinder, and a mounting hole is provided on the support plate. The universal wheel passes through the mounting hole and is connected to the mounting plate.

[0015] By adopting the above technical solution, the ceramic pump that needs to be repaired can be easily moved by setting a mobile positioning device, and the mobile and fixed modes can be set for easy use.

[0016] Preferably, the front guard plate and the rear guard plate are both metal shells, a front guard plate ceramic lining and a rear guard plate ceramic lining are respectively provided on the inner sides of the front guard plate and the rear guard plate, and a pump casing ceramic lining is provided on the inner side of the pump casing.

[0017] By adopting the above technical solution, ceramic liners are arranged in the front guard plate, the rear guard plate and the pump casing, and the ceramic structure has high wear resistance, which greatly improves the service life of the ceramic pump.

[0018] Preferably, a first partition layer is provided between the front guard plate and the front guard plate ceramic lining, a second partition layer is provided between the rear guard plate and the rear guard plate ceramic lining, and a third partition layer is provided between the pump casing and the pump casing ceramic lining.

[0019] By adopting the above technical solution, by setting the first partition layer, the second partition layer and the third partition layer, the vibration of the ceramic lining and the metal shell is well buffered, and has a good shock-absorbing and noise-reducing effect. At the same time, it also has a good bonding effect, and the ceramic lining and the metal shell are firmly bonded.

[0020] Preferably, the first interlayer, the second interlayer and the third interlayer are made of epoxy resin AB glue.

[0021] By adopting the above technical solution, the epoxy resin AB glue has high bonding strength, high hardness, high chemical resistance, and also has an anti-yellowing effect.

[0022] In summary, the present invention has the following beneficial technical effects:

[0023] 1. The durable ceramic pump described in the present invention achieves zero leakage of the ceramic pump during operation through mechanical sealing, improves the on-site environment, and is easy to start the pump by reducing the outer diameter of the auxiliary impeller. At the same time, the centrifugal force of the liquid flowing out through the auxiliary impeller is reduced, thereby reducing the scouring of the pressure reducing cover. By increasing the inner hole diameter of the rear guard plate, the slag slurry can flow out from the inner hole of the rear guard plate when the pump is stopped, thereby reducing the deposition of slurry in the pressure reducing cover and the rear guard plate. In addition, a mechanical seal is adopted, and the dynamic ring and the static ring are in close contact along the axial direction by a spring to achieve the sealing purpose, thereby improving the sealing performance, ensuring that the slag slurry has no leakage, and the operation is reliable, thereby ensuring the working efficiency of the ceramic pump.

[0024] 2. The durable ceramic pump described in the present invention has ceramic liners on the front guard plate, the rear guard plate and the pump casing. The ceramic structure has high wear resistance, which greatly improves the service life of the ceramic pump.

[0025] 3. The durable ceramic pump described in the present invention is convenient for moving the ceramic pump that needs to be repaired by providing a mobile positioning device, and the mobile and fixed modes can be set for easy use.

[0026] 4. The durable ceramic pump described in the present invention has a good buffering effect on the vibration of the ceramic liner and the metal shell by arranging the first partition layer, the second partition layer and the third partition layer between the ceramic liner and the metal shell, has a good shock-absorbing and noise-reducing effect, and also has a good bonding effect, firmly bonding the ceramic liner and the metal shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of part of the internal structure of the present invention.

[0028] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of A.

[0029] Figure 3 It is a structural schematic diagram of the present invention in a mobile state.

[0030] Figure 4 It is a structural schematic diagram of the present invention in a fixed state.

[0031] Description of reference numerals: 1. spindle; 2. bracket; 3. bearing;

[0032] 4. Mechanical seal; 41. Dynamic ring; 42. Static ring; 43. Spring; 44. Spring push ring;

[0033] 5. Pump casing; 51. Pump casing ceramic lining;

[0034] 6. Main impeller; 7. Auxiliary impeller; 71. First gap;

[0035] 8. Front guard plate; 81. Ceramic lining of front guard plate;

[0036] 9. Rear guard plate; 91. Ceramic lining of rear guard plate; 92. Second gap;

[0037] 10. Combination plate; 11. Sealing sleeve; 12. Pressure reducing cover; 13. Stationary ring seat; 14. Universal wheel; 15. Support plate; 16. Bottom plate; 17. Mounting plate. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-2 The present invention is described in further detail.

[0039] The embodiment of the present invention discloses a durable ceramic pump. Figure 1 A durable ceramic pump includes a main shaft 1, a pump body and a bracket 2. The main shaft 1 is rotatably connected to the bracket 2 through a bearing 3. One end of the main shaft 1 is transmission-connected to the pump body. A mechanical seal 4 is provided on the main shaft 1 between the bracket 2 and the pump body.

[0040] The pump body includes a pump casing 5 and a main impeller 6 and an auxiliary impeller 7 arranged inside the pump casing 5. The main impeller 6 is arranged at the end of the main shaft 1, and the auxiliary impeller 7 is arranged on the main shaft 1 between the mechanical seal 4 and the main impeller 6. A front guard plate 8 is arranged in front of the main impeller 6, and a rear guard plate 9 is arranged behind the main impeller 6. The front guard plate 8, the rear guard plate 9 and the pump casing 5 form a cavity for accommodating the main impeller 6. The rear guard plate 9 is provided with an inner hole, and the inner hole is sleeved on the main shaft 1, and there is a second gap 92 with the main shaft 1. The diameter of the inner hole is enlarged, and the second gap 92 is 85mm. By increasing the inner hole diameter of the rear guard plate 9, the inner diameter is equal to the diameter of the auxiliary impeller 7. When the pump is stopped, the slag slurry can flow out from the inner hole of the rear guard plate 9, reducing the deposition of slurry in the pressure reducing cover 12 and the rear guard plate 9. The mechanical seal realizes zero leakage of the ceramic pump during operation, improving the on-site environment.

[0041] Specifically, it also includes a combining plate 10 and a sealing sleeve 11. The combining plate 10 is arranged on the bracket 2. The rear guard plate 9 is connected to the combining plate 10. The sealing sleeve 11 is provided on the main shaft 1. The sealing sleeve 11 is provided with a pressure reducing cover 12 and a stationary ring seat 13. The outer edge of the pressure reducing cover 12 is crimped between the combining plate 10 and the rear guard plate 9. The front end of the pressure reducing cover 12 is connected to the stationary ring seat 13. A coolant space is formed between the stationary ring seat 13, the pressure reducing cover 12 and the mechanical seal 4.

[0042] Specifically, the diameter of the auxiliary impeller 7 is smaller than the diameter of the pressure reducing cover 12, and there is a first gap 71 between the auxiliary impeller 7 and the pressure reducing cover 12. The outer diameter of the auxiliary impeller 7 is reduced to 2 / 3 of the original, and the gap 71 is 80 mm. The outer diameter of the auxiliary impeller 7 is reduced, and the gap 71 between the auxiliary impeller 7 and the pressure reducing cover 12 is enlarged, which makes it easy to start the pump. At the same time, the centrifugal force of the liquid flowing out through the auxiliary impeller 7 is reduced, thereby reducing the scouring of the pressure reducing cover 12.

[0043] Specifically, refer to Figure 2 The mechanical seal 4 includes a dynamic ring 41, a static ring 42, a spring 43 and a spring push ring 44. The static ring 42 is connected to the static ring seat 13. The dynamic ring 41 is arranged on the inner side of the static ring 42 and connected to the sealing sleeve 11. The spring 43 is arranged on the inner side of the dynamic ring 41. The spring push ring 44 is arranged between the dynamic ring 41 and the spring 43. A mechanical seal is adopted. The dynamic ring 41 and the static ring 42 are in close contact along the axial direction by the spring 43 to achieve the sealing purpose, thereby improving the sealing performance, ensuring that the slag slurry has no leakage, and the operation is reliable, which ensures the working efficiency of the ceramic pump.

[0044] The moving ring 41 and the stationary ring 42 are generally made of different wear-resistant materials, one soft and one hard, such as graphite, polytetrafluoroethylene, cemented carbide, ceramics, tungsten carbide, silicon nitride, and steel. When the main shaft 1 rotates, it can drive the moving ring 41 to rotate together. Under the action of the spring 43, the moving ring 41 is pressed against the stationary ring 42 through a layer of oil film to achieve a sealing effect. The spring push ring 44 uses an adjusting screw (not shown in the figure) to adjust the pressure of the spring 43 to adjust the sealing degree between the moving ring 41 and the stationary ring 42.

[0045] Specifically, refer to Figure 3 and Figure 4 , also includes a mobile positioning device, the mobile positioning device includes a universal wheel 14 and a support plate 15, the lower end of the bracket 2 is fixedly connected to a base plate 16, and a mounting plate 17 is connected to the lower surface of the base plate 16, the mounting plate 17 is connected to the support plate 15 through a pneumatic cylinder 18, and a mounting hole is provided on the support plate 15, and the universal wheel 14 is connected to the mounting plate 17 through the mounting hole. When moving, the pneumatic cylinder 18 is retracted, driving the support plate 15 to retract, and the universal wheel 14 touches the ground, so that the ceramic pump can be moved. After moving to the specified position, the piston rod of the pneumatic cylinder 18 is extended, driving the support plate 15 to move downward until the universal wheel 14 leaves the ground. By setting the mobile positioning device, it is convenient to move the ceramic pump, and the mobile and fixed modes can be set, which is convenient to use.

[0046] Specifically, the front guard plate 8, the rear guard plate 9 and the pump casing 5 are all metal shells, and a front guard plate ceramic lining 81 and a rear guard plate ceramic lining 91 are respectively provided on the inner sides of the front guard plate 8 and the rear guard plate 9, and a pump casing ceramic lining 51 is provided on the inner side of the pump casing 5. At the same time, ceramic liners are provided inside the front guard plate 8, the rear guard plate 9 and the pump casing 5. The ceramic structure has high wear resistance, which greatly improves the service life of the ceramic pump.

[0047] Specifically, a first partition is provided between the front guard plate 8 and the front guard plate ceramic lining 81, a second partition is provided between the rear guard plate 9 and the rear guard plate ceramic lining 91, and a third partition is provided between the pump casing 5 and the pump casing ceramic lining 51. By arranging the first partition, the second partition and the third partition, the vibration of the ceramic lining and the metal shell is well buffered, and the effect of shock absorption and noise reduction is well achieved. At the same time, there is also a good bonding effect, and the ceramic lining and the metal shell are firmly bonded.

[0048] Specifically, the first interlayer, the second interlayer and the third interlayer are made of epoxy resin AB glue. The epoxy resin AB glue has high bonding strength, high hardness, high chemical resistance, and also has an anti-yellowing effect.

[0049] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. 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.

[0050] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A durable ceramic pump, characterized in that: The pump comprises a main shaft (1), a pump body and a bracket (2), wherein the main shaft (1) is rotatably connected to the bracket (2) via a bearing (3), one end of the main shaft (1) is drivingly connected to the pump body, and a mechanical seal (4) is provided on the main shaft (1) between the bracket (2) and the pump body; The pump body comprises a pump casing (5) and a main impeller (6) and an auxiliary impeller (7) arranged inside the pump casing (5); the main impeller (6) is arranged at the shaft end of the main shaft (1); the auxiliary impeller (7) is arranged on the main shaft (1) between the mechanical seal (4) and the main impeller (6); a front guard plate (8) is arranged in front of the main impeller (6); a rear guard plate (9) is arranged behind the main impeller (6); the front guard plate (8), the rear guard plate (9) and the pump casing (5) form a cavity for accommodating the main impeller (6); an inner hole is provided on the rear guard plate (9); the diameter of the inner hole is equal to the diameter of the auxiliary impeller (7); the inner hole is sleeved on the main shaft (1) and has a second gap (92) with the main shaft (1); the second gap (92) is 5-300 mm; It also includes a coupling plate (10) and a sealing sleeve (11), wherein the coupling plate (10) is arranged on the bracket (2), the rear guard plate (9) is connected to the coupling plate (10), a sealing sleeve (11) is arranged on the main shaft (1), a pressure reducing cover (12) and a stationary ring seat (13) are arranged on the sealing sleeve (11), an outer edge of the pressure reducing cover (12) is crimped between the coupling plate (10) and the rear guard plate (9), a front end of the pressure reducing cover (12) is connected to the stationary ring seat (13), and a cooling liquid space is formed between the stationary ring seat (13), the pressure reducing cover (12) and the mechanical seal (4); The diameter of the auxiliary impeller (7) is smaller than the diameter of the pressure reducing cover (12); a first gap (71) exists between the auxiliary impeller (7) and the pressure reducing cover (12); the first gap (71) is 80 mm, and the first gap (71) is connected to the second gap (92); The mechanical seal (4) comprises a moving ring (41), a stationary ring (42), a spring (43) and a spring push ring (44); the stationary ring (42) is connected to the stationary ring seat (13); the moving ring (41) is arranged on the inner side of the stationary ring (42) and connected to the sealing sleeve (11); the spring (43) is arranged on the inner side of the moving ring (41); and the spring push ring (44) is arranged between the moving ring (41) and the spring (43).

2. A durable ceramic pump according to claim 1, characterized in that: The invention also comprises a mobile positioning device, the mobile positioning device comprising a universal wheel (14) and a support plate (15), the lower end of the bracket (2) being fixedly connected to a base plate (16), the lower surface of the base plate (16) being connected to a mounting plate (17), the mounting plate (17) being connected to the support plate (15) via a pneumatic cylinder (18), the support plate (15) being provided with a mounting hole, the universal wheel (14) passing through the mounting hole and being connected to the mounting plate (17).

3. A durable ceramic pump according to claim 1, characterized in that: The front guard plate (8), the rear guard plate (9) and the pump casing (5) are all metal casings; a front guard plate ceramic lining (81) and a rear guard plate ceramic lining (91) are provided on the inner sides of the front guard plate (8) and the rear guard plate (9), respectively; and a pump casing ceramic lining (51) is provided on the inner side of the pump casing (5).

4. A durable ceramic pump according to claim 3, characterized in that: A first partition layer is provided between the front guard plate (8) and the front guard plate ceramic lining (81), a second partition layer is provided between the rear guard plate (9) and the rear guard plate ceramic lining (91), and a third partition layer is provided between the pump casing (5) and the pump casing ceramic lining (51).

5. A durable ceramic pump according to claim 4, characterized in that: The first interlayer, the second interlayer and the third interlayer are made of epoxy resin AB glue.

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