Pump shell of slurry pump and slurry pump

Abstract

The utility model relates to the technical field of slurry pumps, and provides a slurry pump casing which comprises a volute, a pump casing, a first annular rib plate, a rear protection plate and a first annular sealing rubber rope, a first annular abutting face is arranged on the outer wall of the volute close to a first opening, the volute is sleeved with the pump casing, the first annular rib plate is arranged at a third opening of the pump casing, and the second annular rib plate is arranged at a fourth opening of the pump casing. One end of the first annular rib plate is provided with a second annular abutting surface, the second annular abutting surface is opposite to the first annular abutting surface, the rear protection plate is arranged in the first opening, the rear protection plate is provided with a first annular protruding edge, and the first annular protruding edge is located between the first annular abutting surface and the second annular abutting surface; the first annular sealing rubber rope is arranged between the first annular protruding edge and the first annular abutting face, the inner diameter of the first annular rib plate is smaller than that of the first annular sealing rubber rope, and the outer diameter of the first annular rib plate is larger than that of the first annular sealing rubber rope. By means of the technical scheme, the problems that in the prior art, a slurry pump is poor in stability and short in service life are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of slurry pumps, and specifically to a slurry pump casing and a slurry pump. Background Art

[0002] Slurry pumps are widely used in industries such as power, metallurgy, and coal to transport abrasive slurries containing solid particles. The working environment in these industries is usually very harsh, and slurry pumps need to face high wear, high corrosion, and complex and changeable working conditions. However, due to the shell structure and overall structural design of existing slurry pumps, their own strength and durability still need to be improved, which limits their application in various complex working conditions. Especially in highly wearable and highly corrosive environments, the service life and reliability of slurry pumps are challenged. Utility Model Content

[0003] The utility model provides a slurry pump casing and a slurry pump, which solve the problems of poor environmental adaptability and short service life of the slurry pump in the prior art.

[0004] The technical solution of the utility model is as follows: a slurry pump casing, comprising:

[0005] The volute has a first opening and a second opening on both sides respectively, and the outer wall of the volute has a first annular abutment surface adjacent to the first opening.

[0006] A pump casing is sleeved outside the volute, and two sides of the pump casing are respectively provided with a third opening and a fourth opening.

[0007] A first annular rib plate is arranged at the third opening of the pump housing, one end of the first annular rib plate has a second annular abutting surface, and the second annular abutting surface is opposite to the first annular abutting surface.

[0008] A rear guard plate is arranged in the first opening, the outer wall of the rear guard plate is in contact with the inner wall of the first opening, the rear guard plate has a first annular convex edge, and the first annular convex edge is located between the first annular abutting surface and the second annular abutting surface.

[0009] The first annular sealing rope is arranged between the first annular protrusion and the first annular abutting surface, the inner diameter of the second annular abutting surface is smaller than the inner diameter of the first annular sealing rope, the outer diameter of the second annular abutting surface is larger than the outer diameter of the first annular sealing rope, the diameter of the first opening is larger than the inner diameter of the second annular abutting surface, and the diameter of the first opening is smaller than the outer diameter of the second annular abutting surface.

[0010] As a further technical solution,

[0011] The outer wall of the volute has a third annular abutment surface adjacent to the second opening.

[0012] A second annular rib is disposed at the fourth opening of the pump housing, one end of the second annular rib has a fourth annular abutting surface, the third annular abutting surface is opposite to the fourth annular abutting surface,

[0013] A front guard plate is arranged in the second opening, the outer wall of the front guard plate is in contact with the inner wall of the second opening, the front guard plate has a second annular convex edge, and the second annular convex edge is located between the third annular abutting surface and the fourth annular abutting surface.

[0014] The second annular sealing rope is arranged between the second annular protrusion and the third annular abutting surface, the inner diameter of the fourth annular abutting surface is smaller than the inner diameter of the second annular sealing rope, the outer diameter of the fourth annular abutting surface is larger than the outer diameter of the second annular sealing rope, the diameter of the second opening is larger than the inner diameter of the fourth annular abutting surface, and the diameter of the second opening is smaller than the outer diameter of the fourth annular abutting surface.

[0015] As a further technical solution, the pump housing includes:

[0016] Front half pump housing,

[0017] The rear half pump casing, the front half pump casing and the rear half pump casing are respectively located on both sides of the volute, and the front half pump casing and the rear half pump casing are connected by bolts to form the pump casing.

[0018] As a further technical solution,

[0019] The volute has a volute outlet pipe portion,

[0020] The pump casing has a pump casing outlet pipe portion, the pump casing outlet pipe portion is sleeved outside the volute casing outlet pipe portion, and there is a gap between the pump casing outlet pipe portion and the volute casing outlet pipe portion.

[0021] Also includes,

[0022] An adjusting bolt is threadedly arranged on the outlet pipe portion of the pump casing, and one end of the adjusting bolt extends into the gap and contacts the outer wall of the outlet pipe portion of the volute casing.

[0023] As a further technical solution,

[0024] The pump housing has an annular portion, and the pump housing outlet pipe portion is located at the edge of the annular portion.

[0025] The pump housing has a plurality of first reinforcing ribs, and the plurality of first reinforcing ribs are distributed along the circumference of the annular portion.

[0026] The pump casing also has a second reinforcing rib plate, and the second reinforcing rib plate is close to the outlet pipe portion of the pump casing.

[0027] As a further technical solution,

[0028] The second reinforcing rib plate is arranged at an angle to the conveying direction of the pump casing outlet pipe portion, and the second reinforcing rib plate has an intersection with at least two of the first reinforcing rib plates.

[0029] As a further technical solution,

[0030] The pump housing is provided with a lifting eye screw connection portion.

[0031] As a further technical solution,

[0032] The number of the eyebolt connection parts is three, and the three eyebolt connection parts are distributed in a triangle.

[0033] As a further technical solution,

[0034] The edges of the front half pump casing and the rear half pump casing are each provided with a plurality of connecting ears, and the connecting ears are used to connect the front half pump casing and the rear half pump casing to each other.

[0035] A slurry pump is also proposed, comprising the slurry pump casing, and further comprising:

[0036] An impeller is rotatably mounted on the rear guard plate, and the impeller is located in the volute.

[0037] A shaft body is rotatably arranged on the pump housing, one end of the shaft body is connected to the impeller,

[0038] A front guard plate is arranged in the second opening, and a channel is provided in the middle of the front guard plate.

[0039] an inlet short pipe, arranged on the fourth opening, the inlet short pipe being communicated with the channel,

[0040] An outlet short pipe is arranged at the outlet of the pump casing.

[0041] The working principle and beneficial effects of the utility model are:

[0042] In the utility model, the volute is one of the core components of the pump casing, and the first opening and the second opening on both sides thereof provide installation positions for key components such as the rear guard plate, the impeller, the front guard plate, and the inlet short pipe, respectively, so that the structural layout of the entire pump is more reasonable. The pump casing is sleeved outside the volute, which provides physical protection for the volute, reduces the damage to it by external environmental factors, and improves the stability of use in complex environments such as high temperature and high pressure. The flow-through parts inside the pump casing are prone to wear, cavitation and other phenomena. When worn to a certain extent, the internal slurry sometimes leaks out. At this time, the pump casing can avoid slurry splashing, prevent high-temperature slurry or corrosive slurry from causing harm to the human body, and improve safety in use. The setting of the first annular abutment surface provides an accurate positioning reference for the installation of the rear guard plate and the first annular sealing rubber rope, ensuring the accuracy and stability of the sealing structure. The setting of the first annular rib plate at the third opening enhances the structural strength of the pump casing from the outside, and can effectively resist the influence of internal fluid pressure and external forces. The first annular sealing rubber rope is arranged between the first annular convex edge and the first annular abutting surface, forming a reliable sealing structure, preventing the leakage of slurry during the operation of the pump, and ensuring the working efficiency and reliability of the pump, especially the first annular abutting surface and the second annular abutting surface are opposite, and the first annular sealing rubber rope is completely within the action surface range of the two, so when the first annular abutting surface and the second annular abutting surface generate a force, the first annular sealing rubber rope is fully and evenly stressed, so that the sealing is better. This whole set of structures cooperates with each other, laying a solid foundation for the stable operation of the entire slurry pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0044] Figure 1 This is a side view of the structure of the utility model;

[0045] Figure 2 For this utility model Figure 1 Middle A is a schematic diagram of a partially enlarged structure;

[0046] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0047] Figure 4 This is a schematic diagram of the cross-sectional explosion structure of the utility model;

[0048] Figure 5 It is a schematic diagram of the cross-sectional structure of the volute outlet pipe portion and the pump casing outlet pipe portion of the utility model;

[0049] In the figure: 1-volute, 11-first opening, 12-second opening, 13-first annular abutment surface, 14-third annular abutment surface, 15-volute outlet pipe portion, 2-pump casing, 21-third opening, 22-fourth opening, 23-front half pump casing, 24-rear half pump casing, 25-pump casing outlet pipe portion, 26-annular portion, 3-first annular rib, 31-second annular abutment surface, 4-rear guard plate, 41-first annular flange, 5-first annular sealing rubber rope, 6-second annular rib, 61-fourth annular abutment surface, 7-front guard plate, 71-second annular flange, 72-channel, 81-second annular sealing rubber rope, 82-adjusting bolt, 83-first reinforcing rib plate, 84-second reinforcing rib plate, 85-eye screw connection portion, 86-connecting ear, 91-impeller, 92-shaft body, 93-inlet short pipe, 94-outlet short pipe. DETAILED DESCRIPTION

[0050] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0051] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0052] In this article, it should be noted that, 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0053] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0054] like Figure 1-5As shown, the utility model proposes a slurry pump casing, including a volute 1, a pump casing 2, a first annular rib plate 3, a rear guard plate 4 and a first annular sealing rubber rope 5. The volute 1 has a first opening 11 and a second opening 12 on both sides, and the outer wall of the volute 1 has a first annular abutment surface 13 adjacent to the first opening 11. The pump casing 2 is sleeved outside the volute 1, and the pump casing 2 has a third opening 21 and a fourth opening 22 on both sides. The first annular rib plate 3 is arranged at the third opening 21 of the pump casing 2, and one end of the first annular rib plate 3 has a second annular abutment surface 31, and the second annular abutment surface 31 is opposite to the first annular abutment surface 13. The rear guard plate 4 is arranged In the first opening 11, the outer wall of the rear guard plate 4 fits with the inner wall of the first opening 11, and the rear guard plate 4 has a first annular convex edge 41, which is located between the first annular abutting surface 13 and the second annular abutting surface 31, and the first annular sealing rope 5 is arranged between the first annular convex edge 41 and the first annular abutting surface 13, the inner diameter of the second annular abutting surface 31 is smaller than the inner diameter of the first annular sealing rope 5, and the outer diameter of the second annular abutting surface 31 is larger than the outer diameter of the first annular sealing rope 5, the diameter of the first opening 11 is larger than the inner diameter of the second annular abutting surface 31, and the diameter of the first opening 11 is smaller than the outer diameter of the second annular abutting surface 31.

[0055] In this embodiment, Figure 4As shown, the volute 1 is one of the core components of the pump housing, and the first opening 11 and the second opening 12 on both sides thereof provide installation positions for key components such as the rear guard plate 4, the impeller 91, the front guard plate 7, the inlet short pipe 93, etc., respectively, so that the structural layout of the entire pump is more reasonable. The pump housing 2 is sleeved outside the volute 1, providing physical protection for the volute 1, reducing the damage to it by external environmental factors, and improving the stability of use in complex environments such as high temperature and high pressure. The internal flow parts of the pump housing 2 are prone to wear, cavitation and other phenomena. When worn to a certain extent, the internal slurry sometimes leaks out. At this time, the pump housing 2 can avoid slurry splashing, avoid high-temperature slurry or corrosive slurry from causing harm to the human body, and improve the safety of use. The setting of the first annular abutment surface 13 provides an accurate positioning reference for the installation of the rear guard plate 4 and the first annular sealing rubber rope 5, ensuring the accuracy and stability of the sealing structure. The setting of the first annular rib plate 3 at the third opening 21 enhances the structural strength of the pump housing from the outside, and can effectively resist the influence of internal fluid pressure and external forces. The first annular sealing rubber rope 5 is arranged between the first annular convex edge 41 and the first annular abutting surface 13, forming a reliable sealing structure, preventing the leakage of slurry during the operation of the pump, and ensuring the working efficiency and reliability of the pump, especially the first annular abutting surface 13 and the second annular abutting surface 31 are opposite, and the first annular sealing rubber rope 5 is completely within the action surface range of the two, so that when the first annular abutting surface 13 and the second annular abutting surface 31 generate an action force, the first annular sealing rubber rope 5 is completely stressed and the force is evenly applied, so that the sealing performance is better, the diameter of the first opening 11 is larger than the inner diameter of the second annular abutting surface 31, and the diameter of the first opening 11 is smaller than the outer diameter of the second annular abutting surface 31, so that the joint between the rear guard plate 4 and the first opening 11 is located within the range of the second annular abutting surface 31, so that there is better sealing performance. This set of structures cooperates with each other, laying a solid foundation for the stable operation of the entire slurry pump.

[0056] Further, the outer wall of the volute 1 is provided with a third annular abutting surface 14 adjacent to the second opening 12, the second annular rib 6 is arranged at the fourth opening 22 of the pump casing 2, one end of the second annular rib 6 is provided with a fourth annular abutting surface 61, the third annular abutting surface 14 is opposite to the fourth annular abutting surface 61, the front guard plate 7 is arranged in the second opening 12, the outer wall of the front guard plate 7 is in contact with the inner wall of the second opening 12, the front guard plate 7 has a second annular convex edge 71, the second annular convex edge 71 is located between the third annular abutting surface 14 and the fourth annular abutting surface 61, the second annular sealing rope 81 is arranged between the second annular convex edge 71 and the third annular abutting surface 14, the inner diameter of the fourth annular abutting surface 61 is smaller than the inner diameter of the second annular sealing rope 81, the outer diameter of the fourth annular abutting surface 61 is larger than the outer diameter of the second annular sealing rope 81, the diameter of the second opening 12 is larger than the inner diameter of the fourth annular abutting surface 61, and the diameter of the second opening 12 is smaller than the outer diameter of the fourth annular abutting surface 61.

[0057] In this embodiment, the third annular abutment surface 14 on the outer wall of the volute 1 adjacent to the second opening 12 also provides precise positioning for the installation of the front guard plate 7 and the second annular sealing rubber rope 81. The second annular rib plate 6 is arranged at the fourth opening, which enhances the structural strength of the pump casing 2 on this side, and together with the first annular rib plate 3, ensures the stability of the pump casing 2 from both sides. The cooperation between the second annular ridge 71 and the second annular sealing rubber rope 81 ensures the sealing of this side to prevent slurry leakage. The diameter of the second opening 12 is larger than the inner diameter of the fourth annular abutment surface 61, and the diameter of the second opening 12 is smaller than the outer diameter of the fourth annular abutment surface 61, so that the joint between the front guard plate 7 and the second opening 12 is located within the range of the fourth annular abutment surface 61, so that there is better sealing. This symmetrical sealing structure design enables the pump casing to withstand pressure from different directions during operation, thereby improving the overall performance and reliability of the pump.

[0058] Furthermore, the pump casing 2 includes a front half pump casing 23 and a rear half pump casing 24 , which are respectively located on both sides of the volute 1 , and the front half pump casing 23 and the rear half pump casing 24 are connected by bolts to form the pump casing 2 .

[0059] In this embodiment, during the routine maintenance and overhaul of the pump, this structure makes the disassembly and installation of the pump housing 2 extremely convenient. When it is necessary to inspect, repair or replace the impeller 91, shaft body 92 and other components inside the pump housing, the staff can easily separate the front half pump housing 23 and the rear half pump housing 24 without large-scale disassembly of the entire pump housing, which greatly reduces the maintenance cost and difficulty. At the same time, the bolt connection method is simple and reliable, which can ensure the structural strength and sealing of the pump housing after assembly, and ensure the stability of the pump during operation.

[0060] Furthermore, the volute 1 has a volute outlet pipe portion 15, and the pump casing 2 has a pump casing outlet pipe portion 25. The pump casing outlet pipe portion 25 is sleeved outside the volute outlet pipe portion 15, and there is a gap between the pump casing outlet pipe portion 25 and the volute outlet pipe portion 15. It also includes an adjusting bolt 82, which is threadedly arranged on the pump casing outlet pipe portion 25, and one end of the adjusting bolt 82 extends into the gap and contacts the outer wall of the volute outlet pipe portion 15.

[0061] In this embodiment, the volute 1 and the pump casing 2 are matched at the outlet through tolerance. Due to the characteristics of the volute structure, the center of gravity of the volute is often biased toward the pump outlet side, which makes it difficult to ensure the matching clearance between the volute and the front and rear pump casings, thereby increasing the pump head and loss. Under normal circumstances, the center of the volute coincides with the center of the pump casing. When the deviation between the volute 1 and the pump casing 2 is too large, it will cause the volute to interfere with the pump casing, seriously affecting the operation of the water pump. By adjusting the adjusting bolt 82, the distance and position relationship between the volute and the pump casing can be controlled, reducing the adverse effects caused by the volute sinking, and improving the overall stability.

[0062] Furthermore, the pump casing 2 has an annular portion 26, the pump casing outlet pipe portion 25 is located at the edge of the annular portion 26, the pump casing outlet pipe portion 25 is tangent to the annular portion 26, the pump casing 2 has a plurality of first reinforcing ribs 83, and the plurality of first reinforcing ribs 83 are distributed along the circumference of the annular portion 26. The pump casing 2 also has a second reinforcing rib 84, and the second reinforcing rib 84 is close to the pump casing outlet pipe portion 25.

[0063] In this embodiment, Figure 1 As shown, the design of the pump casing outlet pipe 25 being tangent to the annular portion 26 allows the fluid to enter the pump casing outlet pipe 25 more smoothly when flowing out from the inside of the pump casing, reducing the resistance and energy loss during the fluid flow. A plurality of first reinforcing ribs 83 are distributed circumferentially along the annular portion 26, which greatly enhances the structural strength of the pump casing 2 near the outlet. During the operation of the pump, the outlet needs to withstand greater fluid pressure and impact force, and the first reinforcing ribs 83 can effectively disperse these forces to prevent the pump casing 2 from deforming or rupturing at this location. The second reinforcing ribs 84 are arranged close to the pump casing outlet pipe 25, further enhancing the structural stability of the outlet. This complete set of structural designs ensures that the slurry can flow out safely and efficiently at the outlet of the pump, improving the overall performance of the pump.

[0064] Furthermore, the second reinforcing rib plate 84 is arranged at an angle to the conveying direction of the pump casing outlet pipe portion 25 , and the second reinforcing rib plate 84 has an intersection with at least two first reinforcing rib plates 83 .

[0065] In this embodiment, the second reinforcing rib plate 84 is set at an angle to the conveying direction of the pump casing outlet pipe 25. This unique design plays an important role. When the fluid flows out of the pump casing outlet pipe 25, it will generate a certain impact force and pressure on the pipe. The angle setting of the second reinforcing rib plate 84 can disperse these forces in different directions, thereby reducing the local stress of the pump casing outlet pipe. At the same time, the second reinforcing rib plate 84 has an intersection with at least two first reinforcing rib plates 83. This cross connection makes the structure of the pump casing 2 more stable. During the operation of the pump, the various reinforcing rib plates can support each other and jointly bear the forces from the internal fluid and the external environment, effectively preventing the pump casing 2 from being deformed or damaged at key parts, and improving the reliability and service life of the pump.

[0066] Furthermore, the pump housing 2 has an eye screw connection portion 85 .

[0067] In this embodiment, the arrangement of the lifting screw connection part 85 on the pump casing 2 provides great convenience for the lifting of the pump casing. During the installation and transportation of the pump, the pump casing needs to be moved to a specified position. The existence of the lifting screw connection part 85 allows the staff to easily lift and move the pump casing using a sling. This design facilitates the on-site installation and commissioning of the pump and improves work efficiency. At the same time, the position and number of the lifting screw connection part 85 are carefully designed to ensure the safety and stability of the lifting process and avoid damage to the pump casing due to improper lifting.

[0068] Furthermore, there are three eyebolt connection parts 85, and the three eyebolt connection parts 85 are distributed in a triangle.

[0069] In this embodiment, Figure 1 As shown, the three lifting screw connection parts 85 are designed to be distributed in a triangle. The three lifting screw connection parts 85 can be specifically divided into a left lifting screw connection part, a middle lifting screw connection part, and a right lifting screw connection part. The required lifting screw connection part 85 can be selected for lifting according to actual installation requirements. When the pump needs to be vertically exported, it is lifted through the middle lifting screw connection part. When the pump needs to be horizontally exported at the lower part, it is lifted through the left lifting screw connection part. When the pump needs to be horizontally exported at the upper part, it is lifted through the right lifting screw connection part, thereby realizing the selection of multiple state positions.

[0070] Furthermore, the edges of the front half pump housing 23 and the rear half pump housing 24 are each provided with a plurality of connecting ears 86 , and the connecting ears 86 are used to connect the front half pump housing 23 and the rear half pump housing 24 to each other.

[0071] In this embodiment, several connecting ears 86 around the edges of the front half pump casing 23 and the rear half pump casing 24 are key components for assembling the pump casing 2. The connecting ears are connected together by bolts and other connecting parts to ensure the structural strength and sealing of the pump casing 2 after assembly. During the operation of the pump, the connecting ears 86 need to withstand the pressure from the internal fluid and various external forces. The design and distribution of these connecting ears enable the front half pump casing and the rear half pump casing to be tightly connected together to form a solid whole. This structural design ensures the stability and reliability of the pump casing during operation and prevents leakage or deformation caused by loose connections.

[0072] A slurry pump is also proposed, comprising a slurry pump casing, an impeller 91, a shaft 92, a front guard plate 7, an inlet short pipe 93 and an outlet short pipe 94, the impeller 91 is rotatably set on the rear guard plate 4, the impeller 91 is located in the volute 1, the shaft 92 is rotatably set on the pump casing 2, one end of the shaft 92 is connected to the impeller 91, the front guard plate 7 is set in the second opening 12, and a channel 72 is provided in the middle of the front guard plate 7, the inlet short pipe 93 is set on the fourth opening 22, the inlet short pipe 93 is connected to the channel 72, and the outlet short pipe 94 is set at the outlet of the pump casing 2.

[0073] In this embodiment, the impeller 91, as the core component of the pump, is rotatably arranged on the rear guard plate 4 and is located in the volute 1, and drives the slurry to flow by rotation. The shaft 92 is rotatably arranged on the pump casing 2, and one end is connected to the impeller 91, which transmits the power of the motor to the impeller 91, so that the impeller 91 can rotate at high speed. The front guard plate 7 is installed in the second opening 12, and the middle channel 72 is connected to the inlet short pipe 93, providing a channel for the entry of the slurry. The inlet short pipe 93 is arranged on the fourth opening 22 to introduce the slurry into the pump casing. The outlet short pipe 94 is arranged at the outlet of the pump casing 2 to output the slurry treated by the pump to a designated location. The various components of this whole system work together to achieve efficient transportation of the slurry and meet the needs of slurry treatment in industrial production.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A slurry pump casing, characterized in that: include, A volute (1) has a first opening (11) and a second opening (12) on both sides respectively, and an outer wall of the volute (1) has a first annular abutment surface (13) adjacent to the first opening (11). A pump casing (2) is sleeved outside the volute (1), and two sides of the pump casing (2) are respectively provided with a third opening (21) and a fourth opening (22). A first annular rib plate (3) is arranged at the third opening (21) of the pump housing (2), one end of the first annular rib plate (3) having a second annular abutment surface (31), the second annular abutment surface (31) being opposite to the first annular abutment surface (13), A rear guard plate (4) is arranged in the first opening (11), the outer wall of the rear guard plate (4) is in contact with the inner wall of the first opening (11), the rear guard plate (4) has a first annular convex edge (41), and the first annular convex edge (41) is located between the first annular abutting surface (13) and the second annular abutting surface (31). The first annular sealing rubber rope (5) is arranged between the first annular protrusion (41) and the first annular abutting surface (13); the inner diameter of the second annular abutting surface (31) is smaller than the inner diameter of the first annular sealing rubber rope (5); the outer diameter of the second annular abutting surface (31) is larger than the outer diameter of the first annular sealing rubber rope (5); the diameter of the first opening (11) is larger than the inner diameter of the second annular abutting surface (31); and the diameter of the first opening (11) is smaller than the outer diameter of the second annular abutting surface (31).

2. A slurry pump casing according to claim 1, characterized in that: The outer wall of the volute (1) has a third annular abutment surface (14) adjacent to the second opening (12). A second annular rib plate (6) is arranged at a fourth opening (22) of the pump housing (2), one end of the second annular rib plate (6) having a fourth annular abutment surface (61), the third annular abutment surface (14) being opposite to the fourth annular abutment surface (61), A front guard plate (7) is arranged in the second opening (12), the outer wall of the front guard plate (7) is in contact with the inner wall of the second opening (12), the front guard plate (7) has a second annular convex edge (71), and the second annular convex edge (71) is located between the third annular abutting surface (14) and the fourth annular abutting surface (61). The second annular sealing rubber rope (81) is arranged between the second annular protrusion (71) and the third annular abutting surface (14); the inner diameter of the fourth annular abutting surface (61) is smaller than the inner diameter of the second annular sealing rubber rope (81); the outer diameter of the fourth annular abutting surface (61) is larger than the outer diameter of the second annular sealing rubber rope (81); the diameter of the second opening (12) is larger than the inner diameter of the fourth annular abutting surface (61); and the diameter of the second opening (12) is smaller than the outer diameter of the fourth annular abutting surface (61).

3. A slurry pump casing according to claim 1, characterized in that: The pump housing (2) comprises: Front half pump housing (23), The rear half pump casing (24), the front half pump casing (23) and the rear half pump casing (24) are respectively located on both sides of the volute (1), and the front half pump casing (23) and the rear half pump casing (24) are connected by bolts to form the pump casing (2).

4. A slurry pump casing according to claim 1, characterized in that: The volute (1) has a volute outlet pipe portion (15), The pump casing (2) has a pump casing outlet pipe portion (25), the pump casing outlet pipe portion (25) is sleeved outside the volute casing outlet pipe portion (15), and a gap is provided between the pump casing outlet pipe portion (25) and the volute casing outlet pipe portion (15). Also includes, An adjusting bolt (82) is threadedly arranged on the pump casing outlet pipe portion (25), and one end of the adjusting bolt (82) extends into the gap and contacts the outer wall of the volute casing outlet pipe portion (15).

5. A slurry pump casing according to claim 4, characterized in that: The pump housing (2) has an annular portion (26), and the pump housing outlet pipe portion (25) is located at the edge of the annular portion (26). The pump housing (2) has a plurality of first reinforcing rib plates (83), wherein the plurality of first reinforcing rib plates (83) are distributed along the circumference of the annular portion (26). The pump casing (2) also has a second reinforcing rib plate (84), wherein the second reinforcing rib plate (84) is close to the pump casing outlet pipe portion (25).

6. A slurry pump casing according to claim 5, characterized in that: The second reinforcing rib plate (84) is arranged at an angle to the conveying direction of the pump casing outlet pipe portion (25), and the second reinforcing rib plate (84) has an intersection with at least two of the first reinforcing rib plates (83).

7. A slurry pump casing according to claim 1, characterized in that: The pump housing (2) is provided with a lifting eye screw connection portion (85).

8. A slurry pump casing according to claim 7, characterized in that: There are three eyebolt connection parts (85), and the three eyebolt connection parts (85) are distributed in a triangle.

9. A slurry pump casing according to claim 3, characterized in that: The front half pump casing (23) and the rear half pump casing (24) are provided with a plurality of connecting ears (86) on their four sides, and the connecting ears (86) are used to connect the front half pump casing (23) and the rear half pump casing (24) to each other.

10. A slurry pump, comprising a slurry pump casing according to any one of claims 1 to 9, characterized in that: Also includes, An impeller (91) is rotatably mounted on the rear guard plate (4), and the impeller (91) is located in the volute (1). A shaft body (92) is rotatably disposed on the pump housing (2), one end of the shaft body (92) being connected to the impeller (91). A front guard plate (7) is arranged in the second opening (12), and a channel (72) is provided in the middle of the front guard plate (7). an inlet short tube (93) disposed on the fourth opening (22), the inlet short tube (93) being in communication with the channel (72), An outlet short pipe (94) is arranged at the outlet of the pump casing (2).

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