CN218780478U

CN218780478U - Water outlet sealing structure of boiler water pump

Info

Publication number: CN218780478U
Application number: CN202222819220.XU
Authority: CN
Inventors: 李晓慧; 李伟
Original assignee: Jiangsu Lihao Intelligent Technology Co ltd
Current assignee: Jiangsu Lihao Intelligent Technology Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-03-31
Anticipated expiration: 2032-10-26

Abstract

The utility model belongs to the technical field of the water pump technique and specifically relates to a boiler water pump outlet seal structure, including blind flange and pump body flange, blind flange fixed mounting is on pump body flange, be equipped with annular sealed pressure head on blind flange's the bottom surface, the outside of sealed pressure head is equipped with first conical surface, and its lower extreme is equipped with sealed cambered surface, be equipped with first bulge loop and second bulge loop on pump body flange's the connection terminal surface, form the terminal surface annular between first bulge loop and the second bulge loop, install the sealing washer in the terminal surface annular, the sealing washer includes the metal circle portion that is equipped with the cavity on the excircle, the upper end of metal circle portion is equipped with seal ring portion, seal ring portion's hole is equipped with the second conical surface, the cavity intussuseption of metal circle portion is filled with rubber circle portion, the mesopore of metal circle portion and the outside booth clearance fit of second bulge loop, this seal structure simple to operate, the sealing washer is out of shape easily during the installation, the leakproofness is good, can bear higher pressure, high pressure can improve sealed effect, the sealing washer is the contact surface of flowing water with the pump body, corrosion resistance is the metal surface, good.

Description

Water outlet sealing structure of boiler water pump

Technical Field

The utility model belongs to the technical field of the water pump technique and specifically relates to a boiler water pump outlet of a river seal structure.

Background

Along with the improvement of the pressure of the novel boiler, the rated flow of the matched boiler feed pump is greatly improved, and the working pressure of a water outlet of the boiler water pump is correspondingly improved and can reach 20MPa. And high requirements are put forward on the sealing performance of each position of the boiler water pump. The water outlet of the water pump is in flange connection, the connecting part of the water pump can be sealed by a rubber sealing ring, but the rubber sealing ring is easy to age and has poor corrosion resistance. The rubber material is soft, so that the rubber material is easy to deform or lose elasticity under a high-pressure state, and the sealing property is poor. In the metal sealing ring with a part of common structures, the size of the water outlet of the water pump is larger, and the size of the corresponding metal sealing ring is also larger, so that the metal sealing ring is compressed and deformed to realize sealing, and needs a large pressing force, and the sealing requirement at the position cannot be met.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior problem, the utility model provides a sealing structure of a water outlet of a boiler water pump.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a boiler water pump outlet seal structure, includes flange cover and pump body flange, flange cover fixed mounting is equipped with annular sealed pressure head on pump body flange, on the bottom surface of flange cover, the outside of sealed pressure head is equipped with first conical surface, and its lower extreme is equipped with sealed cambered surface, be equipped with first bulge loop and second bulge loop on pump body flange's the connection terminal surface, form the terminal surface annular between first bulge loop and the second bulge loop, install the sealing washer in the terminal surface annular, the sealing washer includes the metal circle portion that is equipped with the cavity on the excircle, the upper end of metal circle portion is equipped with sealed ring portion, sealed ring portion's hole is equipped with the second conical surface, the contained angle of second conical surface and flange cover axis is less than the contained angle of first conical surface and flange cover axis, the cavity intussuseption of metal circle portion is filled with rubber circle portion, the excircle of rubber circle portion is greater than the excircle of metal circle portion, and with the inboard interference fit of first bulge loop, the mesopore of metal circle portion and the outside little clearance fit of second bulge loop, after the flange cover installation, first conical surface is on the second conical surface, and the root of sealed cambered surface butt, the excircle butt of first bulge loop, the top surface of first bulge loop inboard of first bulge loop.

According to another embodiment of the present invention, further comprising, the central hole of the metal ring portion is provided with a third conical surface, and the third conical surface meets the second conical surface.

According to the utility model discloses a further embodiment, further include, be equipped with the terminal surface bulge loop of at least one concentric arrangement on the bottom surface of metal loop portion.

According to the utility model discloses a further embodiment, further include, be equipped with the guide ring on the bottom surface of blind flange, the hole of guide ring and the little clearance fit of excircle of first bulge loop.

According to the utility model discloses a further embodiment, further include, be equipped with at least one seal ring groove on the excircle of first bulge loop, install rubber seal in the seal ring groove.

The beneficial effects of the utility model are that, this seal structure simple to operate, the sealing washer is out of shape easily during the installation, has synthesized metal seal and rubber seal's advantage, and the leakproofness is good, can bear higher pressure, and high pressure can improve sealed effect, and the sealing washer is the metal covering with the contact surface of the interior flowing water of pump body, and corrosion resistance is good.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a partial schematic view of the utility model when not connected and locked;

FIG. 2 is an enlarged view at X in FIG. 1;

FIG. 3 is an enlarged view at Y in FIG. 2;

fig. 4 is a partial schematic view of the connection of the present invention.

In the figure, a flange cover 1, a sealing pressure head 11, a first conical surface 111, a guide ring 12, a sealing arc surface 112, a pump body flange 2, a first convex ring 21, a second convex ring 22, an end surface annular groove 23, a sealing ring 3, a metal ring part 31, a rubber ring part 32, a sealing ring part 311, a second conical surface 312, a third conical surface 313 and an end surface convex ring 314.

Detailed Description

Fig. 1-4 are the utility model discloses a structural schematic diagram, a boiler water pump outlet seal structure, including flange lid 1 and pump body flange 2, flange lid 1 fixed mounting is equipped with annular sealed pressure head 11 on pump body flange 2 on the bottom surface of flange lid 1, the outside of sealed pressure head 11 is equipped with first conical surface 111, and its lower extreme is equipped with sealed cambered surface 112, be equipped with first bulge loop 21 and second bulge loop 22 on the connection terminal surface of pump body flange 2, form terminal surface annular groove 23 between first bulge loop 21 and the second bulge loop 22, install sealing washer 3 in the terminal surface annular groove 23, sealing washer 3 includes the metal circle portion 31 that is equipped with the cavity on the excircle, the upper end of metal circle portion 31 is equipped with sealed ring portion 311, sealed ring portion 311's hole is equipped with second conical surface 312, the contained angle of second conical surface 312 and flange lid 1 axis is less than the contained angle of first conical surface 111 and flange lid 1 axis, the cavity intussuseption of metal circle portion 31 is filled with rubber circle portion 32, the excircle of rubber ring portion 32 is greater than the excircle of metal 31, and the inboard of first bulge loop 21 inboard interference fit of second conical surface 111 and the terminal surface 21, the sealed ring portion 21 outside the sealed flange lid 21 butt of the installation of the outer side of the first bulge loop 21, the sealed ring portion 21 outside the installation of the outer side butt of the first bulge loop portion 21, the sealed ring portion of the outer side butt of flange 21.

The first conical surface 111 and the sealing cambered surface 112 are precisely processed, so that the surface smoothness is high, and the sealing effect is improved.

The metal ring portion 31 is made of soft metal, and the main body is of a thin-walled structure. The cavity of the metal ring part 31 is filled with a rubber ring part 32, and the metal ring part 31 is elastically supported. The outer circumference of the metal ring portion 31 is fitted with the inner side of the first male ring 21 with a small clearance.

The sealing ring part 311 is thickened, so that the position where the sealing arc surface 112 abuts against the sealing ring 3 is close to the middle part of the sealing ring 3.

The contact position of the excircle of the sealing ring part 311 and the rubber ring part 32 is provided with a large arc angle, so that the sealing ring part 311 is easier to deform.

Preferably, the central hole of the metal ring portion 31 is provided with a third tapered surface 313, and the third tapered surface 313 is connected with the second tapered surface 312. The structure of the metal ring part 31 is optimized, the occupation ratio of the rubber ring part 32 is reduced, and the metal ring part 31 is convenient to manufacture.

Preferably, at least one end face convex ring 314 is concentrically arranged on the bottom surface of the metal ring part 31. By arranging the end face convex ring 314, the bottom face of the metal ring part 31 is attached to the end face annular groove 23 more tightly, and the sealing effect is improved.

Preferably, the end surface convex ring 314 is provided with two rings, which are respectively close to the outer circle and the middle hole of the metal ring part 31. The end face raised ring 314 is arc-shaped.

Preferably, a guide ring 12 is arranged on the bottom surface of the flange cover 1, and an inner hole of the guide ring 12 is in small clearance fit with an outer circle of the first convex ring 21. Through setting up guide ring 12, when making the installation of blind flange 1, guarantee that sealed pressure head 11 aligns with sealing washer 3, the contact is more accurate, and sealed effect is better.

Preferably, at least one sealing ring groove is formed in the outer circle of the first convex ring 21, and a rubber sealing ring is installed in the sealing ring groove. Further improving the sealing effect.

When the sealing ring is installed, the sealing ring 3 is pressed in the end face ring groove 23, and the outer circle of the rubber ring part 32 is abutted against the inner side of the first convex ring 21. The lid 1 is then attached, and the upper portion of the seal ring portion 311 abuts against the first tapered surface 111. When the fastening members are sequentially and gradually tightened around the flange cover 1, the upper portion of the sealing ring portion 311 is expanded outward by the pressure of the first tapered surface 111 until it abuts against the inner side of the first male ring 21. The sealing curved surface 112 presses the root of the second tapered surface 312. The rubber ring portion 32 also presses the inner side surface of the first projecting ring 21 when the seal ring portion 311 is deformed, and is partially extruded. The central hole of the metal ring portion 31 deforms to abut against the outer side surface of the second projecting ring 22, and the bottom surface thereof abuts against the bottom surface of the end-face ring groove 23. Until the bottom surface of the flange cover 1 abuts against the top surface of the first convex ring 21, the flange cover 1 is installed in place, and the metal ring part 31, the flange cover 1 and the pump body flange 2 form multiple sealing, so that the sealing effect is ensured. When the water pump operates, under the high pressure effect, the sealing surface can further increase contact pressure, guarantees sealed effect.

The foregoing description is intended to be illustrative, rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations, or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a boiler water pump outlet seal structure, includes flange lid (1) and pump body flange (2), flange lid (1) fixed mounting is on pump body flange (2), characterized by, is equipped with annular sealed pressure head (11) on the bottom surface of flange lid (1), the outside of sealed pressure head (11) is equipped with first conical surface (111), and its lower extreme is equipped with sealed cambered surface (112), be equipped with first bulge loop (21) and second bulge loop (22) on the connection terminal surface of pump body flange (2), form terminal surface annular (23) between first bulge loop (21) and second bulge loop (22), install sealing washer (3) in terminal surface annular (23), sealing washer (3) are equipped with metal ring portion (31) of cavity on including the excircle, the upper end of metal ring portion (31) is equipped with sealed ring portion (311), the contained angle of sealed ring portion (311) is equipped with second cone (312), the contained angle of second cone (312) and flange lid (1) axis is less than the contained angle of first conical surface (111) and flange lid (1) and the contained angle of flange lid (1), the inboard clearance fit of metal ring portion (31), the outside rubber ring portion (31) is filled with the clearance of second ring portion (32), the clearance fit in the outside of the rubber ring portion (31), after the flange cover (1) is installed in place, the first conical surface (111) is pressed on the second conical surface (312), the sealing arc surface (112) abuts against the root of the second conical surface (312), the outer circle of the sealing ring portion (311) abuts against the inner side of the first convex ring (21), and the bottom surface of the flange cover (1) abuts against the top surface of the first convex ring (21).

2. The boiler water pump outlet seal structure as set forth in claim 1, wherein the central hole of the metal ring portion (31) is provided with a third tapered surface (313), and the third tapered surface (313) is connected to the second tapered surface (312).

3. The boiler water pump outlet seal structure as set forth in claim 1, wherein at least one end surface convex ring (314) concentrically arranged is provided on a bottom surface of the metal ring portion (31).

4. The boiler water pump outlet seal structure of claim 1, wherein a guide ring (12) is provided on the bottom surface of the flange cover (1), and an inner hole of the guide ring (12) is in small clearance fit with an outer circle of the first convex ring (21).

5. The boiler water pump outlet seal structure of claim 4, wherein the first bulge loop (21) is provided with at least one seal ring groove on the outer circle, and a rubber seal ring is arranged in the seal ring groove.