A silicon carbide ceramic stuffing box for slurry pump

Abstract

The present invention provides a silicon carbide ceramic stuffing box for a slurry pump, which comprises a metal shell, a bonding layer and an inner lining layer from outside to inside, wherein the metal shell and the inner lining layer are bonded and fixed by the bonding layer, wherein the inner lining layer is formed into an annular structure by connecting a plurality of fan-shaped inner lining units end to end in the circumferential direction, wherein the inner lining unit comprises a vertical connection plate, a main annular splicing plate and a central special-shaped splicing plate from outside to inside along the radial direction of the inner lining layer, wherein the vertical connection plate, the main annular splicing plate and the central special-shaped splicing plate are fixedly connected end to end along the radial direction of the inner lining unit. The present invention provides a silicon carbide ceramic stuffing box for a slurry pump with a spliced ​​inner lining that is easy to produce, easy to assemble and has a good sealing effect.

Description

Technical Field

[0001] The invention relates to the technical field of slurry pumps, in particular to a silicon carbide ceramic stuffing box for slurry pumps. Background Art

[0002] The stuffing box is an internal component used to seal the silicon carbide ceramic pump. The through hole in the middle of the stuffing box is used to install the bearing sleeve, and the concave cavity on one side is used to fill the stuffing to seal the shaft and prevent the conveying medium from leaking from the shaft. The existing stuffing box is usually an integral sealing structure, which has high production requirements and is inconvenient to assemble. The inner lining on the concave side is generally a steel lining, which contacts the auxiliary impeller of the ceramic pump and is prone to wear and corrosion. However, since the existing stuffing pump is an integral structure, maintenance personnel cannot disassemble and replace it in time, which consumes a lot of costs.

[0003] Therefore, it is necessary to design a silicon carbide ceramic stuffing box for a slurry pump with a spliced ​​liner that is easy to produce, easy to assemble, and has a good sealing effect. Summary of the invention

[0004] The purpose of the present invention is to provide a silicon carbide ceramic stuffing box for a slurry pump with a spliced ​​liner which is easy to produce, simple to assemble and has a good sealing effect.

[0005] The above technical purpose of the present invention is achieved through the following technical scheme: a silicon carbide ceramic stuffing box for a slurry pump, which includes a metal shell, a bonding layer and an inner lining layer from the outside to the inside, the metal shell and the inner lining layer are bonded and fixed by the bonding layer, the inner lining layer is composed of a plurality of fan-shaped lining units connected end to end circumferentially to form an annular structure, the lining unit includes a vertical connecting plate, a main annular splicing plate and a central special-shaped splicing plate from the outside to the inside along the radial direction of the lining layer, the vertical connecting plate, the main annular splicing plate and the central special-shaped splicing plate are fixedly connected end to end along the radial direction of the lining unit.

[0006] By adopting the above technical scheme, the annular silicon carbide ceramic lining plate is formed into a complete annular structure by connecting a number of fan-shaped lining units end to end along the circumference of the lining plate. At the same time, the lining unit is fixedly connected end to end along the radial direction of the lining unit by the vertical connecting plate, the main annular splicing plate and the central special-shaped splicing plate, forming a four-way splicing and interlocking connection mode, which improves the connection stability of the lining plate, reduces the difficulty of processing and assembly operations of the lining plate, and improves the casting strength.

[0007] As a further configuration of the present invention, one end of the vertical connecting plate is clamped and fixed to the main annular splicing plate, and the angle between the vertical connecting plate and the main annular splicing plate is 80°-100°.

[0008] By adopting the above technical solution, the vertical connecting plate and the main annular splicing plate are fixed by snapping, which is convenient for assembly. In addition, the angle between the vertical connecting plate and the main annular splicing plate matches the structure of the metal shell, which can improve the sealing of the packing.

[0009] As a further configuration of the present invention, a T-shaped groove is provided on the upper surface of the main annular splicing plate along the radial direction of the inner lining layer, and the T-shaped groove is away from the center of the main annular splicing plate. A T-shaped slider matching the shape and position of the T-shaped groove is provided at the end of the vertical connecting plate.

[0010] By adopting the above technical solution and adopting a T-shaped structure, the operation is convenient and the connection is stable.

[0011] As a further configuration of the present invention, the T-shaped slide groove 1 is fan-shaped, and the T-shaped slide groove 1 is coaxial with the main annular splicing plate.

[0012] By adopting the above technical scheme, the fan-shaped T-type slide groove and the T-type slider matching the T-type slide groove are also fan-shaped. When inserting, the short arc side of the fan-shaped T-type slider first contacts the long arc side of the fan-shaped T-type slide groove first. The sliding range is large, which is convenient for insertion and installation. The fan-shaped slide groove has a guiding effect on the slider, which can effectively improve the splicing efficiency.

[0013] As a further configuration of the present invention, it also includes a locking piece, which is L-shaped, and a protrusion 1 and a protrusion 2 are respectively arranged on the two sides of the L-shape of the locking piece, a locking hole 1 matching the protrusion 1 is arranged on the side of the main annular splicing plate facing the concave cavity, and a locking hole 2 matching the protrusion 2 is arranged on the side of the vertical connecting plate facing the concave cavity.

[0014] By adopting the above technical solution, the angle between the main annular splicing plate and the vertical connecting plate is relatively large, and the connection is easily detached by simply plugging in. Therefore, a locking piece is provided, and a protrusion 1 and a protrusion 2 are respectively provided on the locking piece. The protrusion 1 and the protrusion 2 are respectively inserted into the locking holes of the main annular splicing plate and the vertical connecting plate to achieve the function of locking connection.

[0015] As a further configuration of the present invention, the first and second protrusions are T-shaped protrusions, the locking piece is a polytetrafluoroethylene locking piece, and a curved surface is provided on one side of the locking piece pointing to the concave cavity.

[0016] By adopting the above technical scheme, the T-shaped protrusion can improve the tightness of the connection, and polytetrafluoroethylene is acid and alkali resistant, the angle between the main annular splicing plate and the vertical connecting plate is not easy to wear, and the working conditions of the silicon carbide ceramic pump can be achieved. Polytetrafluoroethylene has a certain elasticity, which makes it easy to operate when the T-shaped protrusion is inserted into the locking hole. It can also provide a buffer for the slight movement between the main annular splicing plate and the vertical connecting plate, thereby increasing the stability of the stuffing pump. The side of the locking piece pointing to the concave cavity is set to an arc shape to facilitate the flow of the packing. In addition, the locking piece blocks the connection gap between the main annular splicing plate and the vertical connecting plate, thereby improving the sealing of the stuffing box.

[0017] As a further configuration of the present invention, elastic sealing members are provided in the locking hole one and the locking hole two.

[0018] By adopting the above technical solution, the sealing performance of the device is improved.

[0019] As a further configuration of the present invention, a T-shaped groove 2 is provided on the upper surface of the main annular splicing plate along the radial direction of the inner lining layer, and the T-shaped groove 2 is close to the center of the main annular splicing plate. A T-shaped slider 2 matching the size and shape of the T-shaped groove 2 is provided at the end of one end of the central special-shaped splicing plate.

[0020] By adopting the above technical solution, the T-shaped connection structure can improve the stability of the connection.

[0021] As a further configuration of the present invention, the central special-shaped splicing plate is an integrated silicon carbide ceramic structure, the central special-shaped splicing plate is Z-shaped, and the thickness of the lining layer is 5-12 mm.

[0022] By adopting the above technical solution, the wear resistance of the stuffing box is improved, the processing difficulty of the lining plate is reduced, the thickness of the ceramic lining layer is 5-12mm, and the wear resistance of the ceramic lining layer is improved.

[0023] As a further configuration of the present invention, the lining unit is a silicon carbide ceramic plate, and two fan-shaped straight sides of the lining unit are respectively provided with convex strips and concave grooves, and the positions and sizes of the convex strips and the concave grooves are matched.

[0024] By adopting the above technical solution, the two side edges of the lining unit are connected end to end, and the convex strips are embedded in the grooves to form an interlocking structure, which is simple in structure and easy to assemble.

[0025] The beneficial effects of this program are:

[0026] 1. The silicon carbide ceramic stuffing box for the slurry pump of the present invention is provided with a metal metal shell, a bonding layer and an inner lining layer in sequence from the outside to the inside. The inner lining layer is a silicon carbide ceramic guard plate formed by reaction sintering. The silicon carbide ceramic guard plate and the metal metal shell are sealed and bonded by a bonding layer formed by filling a resin adhesive. The silicon carbide ceramic guard plate has excellent wear resistance and corrosion resistance, and the service life of the device is long.

[0027] 2. The silicon carbide ceramic guard plate of the inner lining layer of the present invention is connected in the form of splicing. On the one hand, due to the advantage of silicon carbide ceramics being light in weight, they are tightly connected and not easy to fall off after being spliced ​​together; on the other hand, the four-way interlocking splicing method is adopted for connection, which greatly reduces the production difficulty and facilitates the assembly operation.

[0028] 3. The silicon carbide ceramic guard plate of the present invention includes three parts: a main annular splicing plate, a vertical connecting plate and a central special-shaped splicing plate. The angle between the main annular splicing plate and the vertical connecting plate is relatively large. Not only is a radial interlocking embedding connection adopted in the form of a fan-shaped T-shaped slide groove and a slider, but a locking piece is also adopted for auxiliary connection. The locking piece is respectively provided with a protrusion 1 and a protrusion 2. The protrusion 1 and the protrusion 2 are respectively inserted into the locking holes of the main annular splicing plate and the vertical connecting plate to achieve a fixed connection. At the same time, the side of the locking piece pointing to the concave cavity is arranged in an arc shape to facilitate the flow of filler. In addition, the locking piece blocks the connection gap between the main annular splicing plate and the vertical connecting plate, thereby improving the sealing of the stuffing box.

[0029] 4. The connecting groove between the main annular splicing plate and the vertical connecting plate of the present invention is a fan-shaped T-shaped slide groove, and the slider matching the slide groove is a fan-shaped T-shaped slider. When inserting, the short arc side of the fan-shaped slider first contacts the long arc side of the fan-shaped slide groove. The sliding range is large, which is convenient for insertion and installation. The fan-shaped slide groove has a guiding effect on the slider, thereby improving the splicing efficiency.

[0030] 5. The center special-shaped splicing plate of the present invention is radially interlocked with the fan-shaped T-shaped groove, which is convenient for timely disassembly and replacement after wear and tear, saving costs. The thickness of the ceramic lining layer is 5-12mm, which further improves the wear resistance of the ceramic lining layer.

[0031] 6. If the diameter of the stuffing box of the present invention is 600-800 mm, this solution can be an integrated structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 It is a schematic diagram of the external structure of the silicon carbide ceramic stuffing box for the slurry pump of the present invention;

[0034] Figure 2 It is a schematic diagram of the explosion structure of the silicon carbide ceramic stuffing box for the slurry pump of the present invention;

[0035] Figure 3 It is a schematic diagram of the explosion structure of the lining unit of the silicon carbide ceramic stuffing box for the slurry pump of the present invention;

[0036] Figure 4 It is a schematic diagram of the half-section structure of the silicon carbide ceramic stuffing box for the slurry pump of the present invention.

[0037] In the figure, 1, metal shell, 2, adhesive layer, 3, lining layer, 4, lining unit, 5, vertical connecting plate, 6, main annular splicing plate, 7, center special-shaped splicing plate, 8, T-type slide groove one, 9, T-type slider one, 10, locking piece, 11, protrusion one, 12, protrusion two, 13, locking hole one, 14, locking hole two, 15, arc surface, 16, elastic sealing part, 17, T-type slide groove two, 18, T-type slider two, 19, convex strip, 20, groove. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figure 1-4 The present invention provides a silicon carbide ceramic stuffing box for a slurry pump, which comprises a metal shell 1, a bonding layer 2 and an inner lining layer 3 from outside to inside, wherein the metal shell 1 and the inner lining layer 3 are bonded and fixed by the bonding layer 2, wherein the inner lining layer 3 comprises a plurality of fan-shaped inner lining units 4, wherein the two straight sides of the fan-shaped inner lining unit 4 are respectively provided with convex strips 19 and grooves 20, wherein the convex strips 19 match the grooves 20 in position and size, and the convex strips 19 are embedded in the grooves 20 to form an interlocking circumferential end-to-end connection to form an annular structure, wherein the inner lining unit 4 comprises a vertical connecting plate 5, a main annular splicing plate 6 and a central special-shaped splicing plate 7 from outside to inside along the radial direction of the inner lining layer 3, wherein the vertical connecting plate 5, the main annular splicing plate 6 and the central special-shaped splicing plate 7 are fixedly connected end to end along the radial direction of the inner lining unit 4, the central special-shaped splicing plate 7 is an integrated silicon carbide ceramic structure, the central special-shaped splicing plate 7 is Z-shaped, and the thickness of the inner lining layer is 5-12 mm.

[0040] Specifically, one end of the vertical connecting plate 5 is clamped and fixed to the main annular splicing plate 6, and the angle between the vertical connecting plate 5 and the main annular splicing plate 6 is 80°-100°.

[0041] Specifically, a T-shaped groove 8 is provided on the upper surface of the main annular splicing plate 6 along the radial direction of the inner lining layer 3, and the T-shaped groove 8 is far away from the center of the main annular splicing plate 6. A T-shaped slider 9 matching the shape and position of the T-shaped groove 8 is provided at the end of the vertical connecting plate 5. The T-shaped groove 8 is fan-shaped and coaxial with the main annular splicing plate 6.

[0042] Specifically, it also includes a locking piece 10, which is L-shaped, and a protrusion 11 and a protrusion 12 are respectively arranged on the two sides of the L-shape of the locking piece 10, a locking hole 13 matching the protrusion 11 is arranged on the side of the main annular splicing plate 6 facing the concave cavity, and a locking hole 14 matching the protrusion 12 is arranged on the side of the vertical connecting plate 5 facing the concave cavity, and the protrusion 11 and the protrusion 12 are both T-shaped protrusions. The locking piece 10 is a polytetrafluoroethylene locking piece, and a curved surface 15 is arranged on the side of the locking piece 10 pointing to the concave cavity, and elastic sealing members 16 are arranged in the locking holes 13 and 14.

[0043] Specifically, a T-shaped groove 17 is provided on the upper surface of the main annular splicing plate 6 along the radial direction of the inner lining layer 3, and the T-shaped groove 17 is close to the center of the main annular splicing plate 6. A T-shaped slider 18 matching the size and shape of the T-shaped groove 17 is provided at the end of one end of the central special-shaped splicing plate 7.

[0044] Working principle: The annular silicon carbide ceramic lining plate is formed into a complete annular structure by embedding and clamping a number of fan-shaped lining units 4 along the circumference of the lining plate. At the same time, the lining unit 4 is composed of a vertical connecting plate 5, a main annular splicing plate 6 and a central special-shaped splicing plate 7. The three parts are embedded and clamped along the radial direction of the lining unit 4 by T-slots and T-blocks to form a four-way splicing interlocking connection, which improves the connection stability of the lining plate. Since the angle between the main annular splicing plate 6 and the vertical connecting plate 5 is large, not only the fan-shaped T-slot and slider are used for radial interlocking embedding connection, but also the locking piece 10 is used for auxiliary connection, which improves the connection tightness of the lining plate unit. This solution reduces the difficulty of processing and assembly operations of the lining plate, and the lining plate can be disassembled after wear, saving maintenance costs.

[0045] The above is a detailed introduction to a silicon carbide ceramic stuffing box for a slurry pump provided by the present invention. This article uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A silicon carbide ceramic stuffing box for a slurry pump, characterized in that: The invention comprises, from outside to inside, a metal shell (1), an adhesive layer (2) and an inner lining layer (3); the metal shell (1) and the inner lining layer (3) are bonded and fixed by the adhesive layer (2); the inner lining layer (3) is composed of a plurality of fan-shaped inner lining units (4) connected end to end in a circumferential direction to form an annular structure; the inner lining unit (4) comprises, from outside to inside along the radial direction of the inner lining layer (3), a vertical connecting plate (5), a main annular splicing plate (6) and a central special-shaped splicing plate (7); the vertical connecting plate (5), the main annular splicing plate (6) and the central special-shaped splicing plate (7) are fixedly connected end to end along the radial direction of the inner lining unit (4); One end of the vertical connection plate (5) is fixedly connected to the main annular splicing plate (6), and the included angle between the vertical connection plate (5) and the main annular splicing plate (6) is 80°-100°; It also includes a locking piece (10), the locking piece (10) is L-shaped, and a first protrusion (11) and a second protrusion (12) are respectively arranged on two sides of the L-shape of the locking piece (10); a first locking hole (13) matching the first protrusion (11) is arranged on the side of the main annular splicing plate (6) facing the concave cavity, and a second locking hole (14) matching the second protrusion (12) is arranged on the side of the vertical connecting plate (5) facing the concave cavity; The upper surface of the main annular splicing plate (6) is provided with a T-shaped slide groove (8) along the radial direction of the inner lining layer (3), and the T-shaped slide groove (8) is away from the center of the main annular splicing plate (6). The end of the vertical connecting plate (5) is provided with a T-shaped sliding block (9) that matches the shape and position of the T-shaped slide groove (8); The T-shaped slide groove 1 (8) is fan-shaped and is coaxial with the main annular splicing plate (6).

2. The silicon carbide ceramic stuffing box for a slurry pump according to claim 1, characterized in that: The first protrusion (11) and the second protrusion (12) are both T-shaped protrusions, the locking piece (10) is a polytetrafluoroethylene locking piece, and a curved surface (15) is provided on the side of the locking piece (10) pointing to the concave cavity.

3. The silicon carbide ceramic stuffing box for a slurry pump according to claim 2, characterized in that: Elastic sealing components (16) are arranged in the locking hole one (13) and the locking hole two (14).

4. The silicon carbide ceramic stuffing box for a slurry pump according to claim 1, characterized in that: The upper surface of the main annular splicing plate (6) is provided with a T-shaped slide groove (17) along the radial direction of the inner lining layer (3), and the T-shaped slide groove (17) is close to the center of the main annular splicing plate (6). The end of one end of the central special-shaped splicing plate (7) is provided with a T-shaped sliding block (18) whose size and shape match the T-shaped slide groove (17).

5. The silicon carbide ceramic stuffing box for a slurry pump according to claim 1, characterized in that: The central special-shaped splicing plate (7) is an integrated silicon carbide ceramic structure, the central special-shaped splicing plate (7) is Z-shaped, and the thickness of the lining layer is 5-12 mm.

6. The silicon carbide ceramic stuffing box for a slurry pump according to claim 1, characterized in that: The lining unit (4) is a silicon carbide ceramic plate, and two fan-shaped straight sides of the lining unit (4) are respectively provided with convex strips (19) and concave grooves (20), and the positions and sizes of the convex strips (19) and the concave grooves (20) match each other.

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