CN217233877U

CN217233877U - Water pump packing gland

Info

Publication number: CN217233877U
Application number: CN202220594300.7U
Authority: CN
Inventors: 钟伟; 吴艺; 凌茂星; 梁勇
Original assignee: Guangxi Liuzhou Iron and Steel Group Co Ltd
Current assignee: Guangxi Liuzhou Iron and Steel Group Co Ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-08-19
Anticipated expiration: 2032-03-18

Abstract

The utility model discloses a water pump packing gland, which relates to the technical field of water pump sealing and comprises a first cover body and a second cover body which are made of steel, wherein the first cover body is provided with a first half cover plate and a first half circular compression ring which are connected into a whole; the butt joint position of the first cover body and the second cover body is arranged on the short side of the gland, the butt joint position is of a concave-convex structure which is embedded with each other along the circumferential direction, and the first cover body and the second cover body are fixedly connected through a positioning pin which is axially connected with the butt joint position. The utility model provides a current water pump packing gland when having tight packing, be crowded problem complicated of splitting and replacement process easily.

Description

Water pump packing gland

Technical Field

The utility model belongs to the technical field of the water pump seal technique and specifically relates to a water pump packing gland.

Background

The water pump can produce great pressure in the work process, and the liquid in order to avoid flowing through the pump body outwards oozes from pump shaft and pump body clearance under this pressure effect, can adopt water pump packing to center on the pump shaft filling gap usually to be equipped with pump body bolt with water pump packing gland and compress tightly water pump packing, in order to play sealed effect, thereby prevent the seepage. The traditional water pump packing gland is manufactured by adopting an integral cast iron forming method and comprises a cover plate and a pressing ring connected to one end face of the cover plate, wherein a through hole matched with a pump shaft is coaxially formed in the cover plate pressing ring, a positioning hole for mounting a pump body bolt is formed in the wide edge of the cover plate, and the end face of the pressing ring is a plane perpendicular to the axis of the gland or a curved surface with a slight radian. The water pump packing gland of this kind of structure has following not enough: 1. in the use process, the gland is easy to crack by squeezing when the packing is tightened, and a new gland can be installed only by taking down the machine and removing the coupler, so that the process is complex and the working time is reduced; 2. when tight packing, can't be effectual crowd packing to axle sleeve department, sealing performance is relatively poor, leads to the water pump too much for a long time to begin again to leak, has influenced the normal operating of equipment.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a water pump packing gland, when current water pump packing gland exists tight packing, the problem complicated by crowded fracture and replacement process easily can be solved to this kind of gland.

In order to solve the above problem, the utility model discloses a technical scheme is: the water pump packing gland comprises a first cover body and a second cover body which are made of steel, wherein the first cover body is provided with a first half cover plate and a first semicircle pressure ring which are connected into a whole; the butt joint position of the first cover body and the second cover body is arranged on the short side of the gland, the butt joint position is a concave-convex structure which is embedded with each other along the circumferential direction, and the first cover body and the second cover body are fixedly connected through a positioning pin which is axially connected with the butt joint position.

Among the above-mentioned water pump packing gland's the technical scheme, more specific technical scheme can also be: the working surfaces of the first semicircular pressure ring and the second semicircular pressure ring are conical surfaces which are inclined inwards.

Further, the inclination angle of the conical surface is 45 °.

Furthermore, first half apron with half apron of second is symmetrical structure, concave-convex structure's bulge sets up on first semicircle clamping ring or the second semicircle clamping ring, a lateral wall of concave-convex structure's concave part is the interior face of first half apron or the half apron of second.

Furthermore, the outer ends of the long edges of the first half cover plate and the second half cover plate are provided with positioning openings.

Further, the steel material is Q235.

Furthermore, the locating pin is provided with one section external screw thread section, the one end of locating pin is opened there is the terminal surface groove.

Further, the outer diameter of the external thread section of the positioning pin is larger than the diameter of the cylindrical section.

Further, the diameter of the cylindrical section is 8 mm.

Since the technical scheme is used, compared with the prior art, the utility model following beneficial effect has:

1. the gland adopts the two half formula structures of being made by steel, convenient to detach and installation, convenient assembling, and the replacement process is simple, has improved the work prescription, and at the locating pin at the concave convex structure's that the gland short border circumference set up butt joint position and axial connection butt joint position, guaranteed the reliability that the gland is connected, the phenomenon of being crowded and splitting can not appear, has promoted the life of gland, reduces the number of times of overhauing.

2. The working surface of the pressure ring is designed into a conical surface, so that the radial extrusion force to packing is increased, the packing sealing effect is better, and frequent water leakage can be effectively avoided.

3. The concave-convex structure design of the butt joint part of the gland ensures accurate butt joint, can improve the loading and unloading efficiency, and has no relative movement between the two covers and firm integral structure.

4. The outer ends of the long edges of the two half cover plates are provided with positioning openings for positioning pump body bolts pressing the gland, so that the disassembly and assembly speed of the gland is improved.

5. The locating pin sets up external screw thread section and end face slot, the quick assembly disassembly round pin body of being convenient for.

Drawings

Fig. 1 is a schematic structural diagram of the packing gland of the water pump.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a schematic view of the positioning pin.

Fig. 4 is a sectional view taken in the direction of a-a in fig. 1.

The reference numbers indicate: 1. a first cover body; 1-1, a first half cover plate; 1-2, a first semicircular pressing ring; 2. a second cover body; 2-1, a second half cover plate; 2-2, a second semicircular pressure ring; 3. positioning pins; 3-1, cylindrical section; 3-2, external thread section; 3-3, end face grooves; 4. a working surface; 5. positioning the opening; 6. a projection; 7. a recessed portion; 8. a threaded hole; 9. a first positioning hole; 10. a second positioning hole; 11. a pump shaft bore.

Detailed Description

The invention will be described in more detail with reference to the following embodiments:

the water pump packing gland that fig. 1 and fig. 2 show is split type structure, and it includes and makes first lid 1, second lid 2 and two locating pins 3 by steel, and the steel of two lids of this embodiment adopts Q235, and the gland is pieced together to first lid 1 and the 2 circumference butt joints of second lid, and two lids pass through two locating pins 3 fixed connection. The first cover body 1 is provided with a first semi-cover plate 1-1 and a first semi-circular press ring 1-2 which are connected into a whole, and the second cover body 2 is also provided with a second semi-cover plate 2-1 and a second semi-circular press ring 2-2 which are connected into a whole. For convenience of processing and installation, the butt joint part of the first cover body 1 and the second cover body 2 is arranged on the short side of the gland, the first half cover plate 1-1 and the second half cover plate 2-1 are of symmetrical structures, and the outer ends of the long sides of the first half cover plate 1-1 and the second half cover plate 2-1 are provided with positioning openings 5 for positioning bolts of the pump body. The butt joint part of the first cover body 1 and the second cover body 2 is a concave-convex structure which is mutually embedded along the circumferential direction, a convex part 6 of the concave-convex structure is arranged on the first semicircular pressure ring 1-2, the convex part 6 circumferentially protrudes out of the first semicircular cover plate 1-1, the radial thickness and curvature of the convex part 6 are consistent with those of the first semicircular pressure ring 1-2, and the axial length of the convex part is half of that of the first semicircular pressure ring 1-2; concave part 7 of concave-convex structure is arranged on second semicircular press ring 2-2, concave part 7 matches with convex part 6, and one side wall of concave part 7 is the inner plate surface of second half apron 2-1. The convex part 6 of the first cover body 1 is completely embedded into the concave part 7 of the second cover body 2, and each abutting surface is tightly attached to form a complete gland after abutting and splicing. The two convex parts 6 of the present embodiment are both provided on the first semi-circular pressure ring 1-2, and the two concave parts 7 are both provided on the second semi-circular pressure ring 2-2. In other embodiments, the convex portions 6 and the concave portions 7 can be completely exchanged, or alternatively arranged on different semicircular compression rings. When the cover is processed, the complete gland can be processed firstly, and then the first cover body 1 and the second cover body 2 which are independent and provided with the n-shaped butt joint parts are formed by cutting according to the designed concave-convex structure.

The first cover body 1 and the second cover body 2 are fixedly connected through a positioning pin 3 axially connecting the butt joint parts. As shown in FIG. 3, in order to facilitate later maintenance, disassembly and assembly, the positioning pin 3 is provided with a section of external thread section 3-2, the external thread section 3-2 extends to one end of the positioning pin 3, the rest part of the positioning pin 3 is a cylindrical section 3-1, the diameter of the cylindrical section 3-1 is 8mm, and the external diameter of the external thread section 3-2 of the positioning pin 3 is larger than that of the cylindrical section 3-1. An end surface groove 3-1 is formed on the positioning pin 3 close to the external thread section 3-2, and the end surface groove 3-1 is a straight open groove. In order to be matched with and install the positioning pin 3, the protruding part 6 of the first semicircular compression ring 1-2 is provided with a first positioning hole 9, the second half cover plate 2-1 is provided with a threaded hole 8 in threaded connection with the external threaded section 3-2 of the positioning pin 3, the positioning pin 3 is prevented from loosening and falling off, and meanwhile, the second semicircular compression ring 2-2 is provided with a second positioning hole 10 which is coaxial with the threaded hole 8.

In order to improve the sealing performance of the packing to the water pump, the working surfaces 4 of the first semicircular pressure ring 1-2 and the second semicircular pressure ring 2-2 of the gland are designed to be conical surfaces which are inclined towards the inside of the pump shaft hole 11 of the gland, and the inclination angle of the conical surfaces is 45 degrees, which is shown in figure 4. The resultant force of the inclined working surface 4 of the pressure ring acting on the packing is decomposed into an axial force and a radial force. Wherein radial force extrudes the packing to the axle sleeve for the axle sleeve is pressed close to more to the packing, and the leak protection effect is better.

When the water pump packing gland is used, a water pump shaft is arranged between the first cover body 1 and the second cover body 2, the first cover body 1 and the second cover body 2 are spliced to form a main body, and then the two positioning pins 3 are screwed in to fixedly connect the first cover body 1 and the second cover body 2, so that a complete and firm gland is obtained. Then install the packing on the water pump axle to tighten the gland through the pump body bolt and seal.

Claims

1. The utility model provides a water pump packing gland which characterized in that: the gland comprises a first cover body and a second cover body, wherein the first cover body and the second cover body are made of steel, the first cover body is provided with a first half cover plate and a first half circular pressure ring which are connected into a whole, the second cover body is provided with a second half cover plate and a second half circular pressure ring which are connected into a whole, and the gland is formed by the first cover body and the second cover body in a butt joint mode in the circumferential direction; the butt joint position of the first cover body and the second cover body is arranged on the short side of the gland, the butt joint position is of a concave-convex structure which is embedded with each other along the circumferential direction, and the first cover body and the second cover body are fixedly connected through a positioning pin which is axially connected with the butt joint position.

2. The water pump packing gland according to claim 1, characterized in that: the working surfaces of the first semicircular pressure ring and the second semicircular pressure ring are conical surfaces which are inclined inwards.

3. The water pump packing gland according to claim 2, characterized in that: the inclination angle of the conical surface is 45 degrees.

4. The water pump packing gland according to claim 3, characterized in that: first half apron with half apron of second is symmetrical structure, concave-convex structure's bulge sets up on first semicircle clamping ring or the second semicircle clamping ring, a lateral wall of concave-convex structure's concave part does the interior face of first half apron or the half apron of second.

5. The water pump packing gland according to claim 4, wherein: the outer ends of the long edges of the first half cover plate and the second half cover plate are provided with positioning openings.

6. The water pump packing gland according to claim 5, characterized in that: the steel material adopts Q235.

7. The water pump packing gland according to any one of claims 1 to 6, wherein: the locating pin is provided with one section external screw thread section, the one end of locating pin is opened there is the terminal surface groove.

8. The water pump packing gland according to claim 7, wherein: the outer diameter of the external thread section of the positioning pin is larger than the diameter of the cylindrical section.

9. The water pump packing gland according to claim 8, wherein: the diameter of the cylindrical section is 8 mm.