CN216766115U

CN216766115U - Lip seal for piston type flushing valve

Info

Publication number: CN216766115U
Application number: CN202220083749.7U
Authority: CN
Inventors: 季旭
Original assignee: Yangzhong Huasen Seals Co ltd
Current assignee: Yangzhong Huasen Seals Co ltd
Priority date: 2022-01-13
Filing date: 2022-01-13
Publication date: 2022-06-17
Anticipated expiration: 2032-01-13

Abstract

The utility model discloses a lip-shaped sealing element for a piston type flushing valve, and relates to the technical field of sealing elements. The utility model comprises a lip seal installation seat, a lip seal cover plate arranged at the other side of the lip seal installation seat, a fixing bolt used for connecting the lip seal installation seat and the lip seal cover plate, a lip-shaped sealing ring arranged between the lip seal installation seat and the lip seal cover plate, a piston movably connected with the lip seal installation seat, a connecting spring connected at one end of the piston, and a sealing cover connected with the other end of the connecting spring through an adjusting mechanism; the adjusting mechanism comprises an adjusting bolt in threaded connection with the sealing cover, a movable plate fixedly connected to the other end of the adjusting bolt, a first locking groove formed in the top of a nut of the adjusting bolt, and a second locking groove formed in the outer side wall of the sealing cover. According to the utility model, the distance between the movable plate and the sealing cover is controlled by rotating the adjusting bolt, so that the compression amount of the connecting spring is adjusted, and the adjustment amount is more accurate.

Description

Lip seal for piston type flushing valve

Technical Field

The utility model belongs to the technical field of sealing elements, and particularly relates to a lip-shaped sealing element for a piston type flushing valve.

Background

During operation of the flush valve, the piston member reciprocates with the lip seal in the piston member. A dynamic barrier is established between the upper pressure chamber and the discharge port below the piston member. The lip-shaped sealing ring is sealed by deforming the lip mouth under the action of hydraulic pressure to make the lip mouth tightly attached to the sealing surface. The higher the hydraulic pressure is, the tighter the lip edge is attached to the sealing surface, and the lip edge has certain automatic compensation capability after being worn. Such seals are commonly used for reciprocating dynamic seals, commonly known as Y-and V-seals.

Present lip type sealing washer all control through the spring and the dynamics between the piston, and change the decrement of spring, generally through quantity and the thickness that changes the adjusting shim, but the thickness of gasket is certain, can't control the decrement of spring accurately to the gasket is placed between sealed lid and mount pad, and it is comparatively complicated to change.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a lip-shaped sealing element for a piston type flushing valve, which solves the problems that the compression amount of a spring cannot be accurately controlled in the prior art, and a gasket is arranged between a sealing cover and a mounting seat, so that the replacement is complicated.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model relates to a lip-shaped sealing element for a piston-type flushing valve, which comprises a lip seal mounting seat, a lip seal cover plate arranged at the other side of the lip seal mounting seat, a fixing bolt used for connecting the lip seal mounting seat and the lip seal cover plate, a lip-shaped sealing ring arranged between the lip seal mounting seat and the lip seal cover plate, a piston movably connected with the lip seal mounting seat, a connecting spring connected at one end of the piston, and a sealing cover connected with the other end of the connecting spring through an adjusting mechanism;

the adjusting mechanism comprises an adjusting bolt in threaded connection with the sealing cover, a movable plate fixedly connected to the other end of the adjusting bolt, a first fixed locking groove formed in the top of a nut of the adjusting bolt, a second fixed locking groove formed in the outer side wall of the sealing cover, the inner diameter of the first fixed locking groove is matched with the inner diameter of the second fixed locking groove, and the central axes of the first fixed locking groove and the second fixed locking groove are overlapped.

Preferably, be equipped with a plurality of regulator along circumference on the lip seals the mount pad, the regulator includes along axially extended cavity, and the inner of cavity is through seting up the first through-hole that seals the mount pad at the lip and the second through-hole intercommunication on the lip type sealing washer.

Preferably, the piston is arranged in the cavity, one end of the piston is provided with a thread, the end provided with the thread of the piston penetrates and extends to the other side of the lip-shaped sealing ring, and the outer surface of the piston is in threaded connection with a nut.

Preferably, the sealing cover comprises a mounting plate and a sealing plate fixedly connected to the end face of the mounting plate, and the outer diameter of the sealing plate is matched with the inner diameter of the cavity.

Preferably, four groups of threaded holes which are distributed at equal intervals are formed in the outer side wall of the mounting plate of the sealing cover, and first fixing screws are connected to the inner threads of the threaded holes.

Preferably, the locking device comprises a second fixing screw, the outer diameter of the second fixing screw is matched with the inner diameter of the first locking groove, and the groove bottom of the second fixing screw is larger than the depth of the first locking groove plus the depth of the second locking groove.

Preferably, the outer diameter of the movable plate is equal to the inner diameter of the cavity, and the movable plate is abutted against the connecting spring.

The utility model has the following beneficial effects:

the utility model adds the piston on the back of the lip seal, when the pressure of the seal cavity (medium cavity) changes, the utility model can realize the balance of the lip caliber radial force under different seal pressure conditions through the acting force transmission path of 'seal medium pressure change → medium acting force change acting on the piston → movable plate acting on the back of the lip seal pressing force change → lip mouth holding force change → lip mouth radial force balance', the lip caliber radial force balance is realized, the overlarge lip mouth radial force is avoided, the service life of the lip seal is prolonged, and the distance between the movable plate and the seal cover is controlled by rotating the adjusting bolt, thereby adjusting the compression amount of the connecting spring, when the adjustment is completed, the second fixing screw penetrates through the first fixing locking groove and the second fixing locking groove to fix the adjusting bolt in turn, and then fixed with the fly leaf, through above-mentioned operation, conveniently adjust the compression volume of connecting spring, and the volume of adjusting is more accurate.

Drawings

FIG. 1 is a schematic view of the general construction of a lip seal for a piston-type flushometer of the present invention;

FIG. 2 is a schematic view of the back of the seal of a lip seal configuration for a piston-type flushometer of the present invention;

FIG. 3 is an enlarged schematic view of structure A of FIG. 1 of a lip seal for a piston-type flushometer in accordance with the present invention;

FIG. 4 is a schematic front view of a lip seal cover for a piston-type flushometer of the present invention;

fig. 5 is a schematic view of a lip seal adjusting bolt for a piston-type flushometer according to the present invention.

In the figure: 1. a lip seal mounting base; 2. a lip seal cover plate; 3. fixing the bolt; 4. a lip-shaped seal ring; 5. a piston; 6. a nut; 7. a connecting spring; 8. a sealing cover; 9. adjusting the bolt; 10. a movable plate; 11. a first locking groove; 12. a second locking groove; 13. a threaded hole; 14. a first set screw.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

Referring to fig. 1-5, the present invention is a lip seal for a piston-type flush valve, including a lip seal mounting seat 1, a lip seal cover plate 2 provided with the other side of the lip seal mounting seat 1, a fixing bolt 3 for connecting the lip seal mounting seat 1 and the lip seal cover plate 2, a lip-shaped seal ring 4 provided between the lip seal mounting seat 1 and the lip seal cover plate 2, a piston 5 movably connected with the lip seal mounting seat 1, a connecting spring 7 connected with one end of the piston 5, and a seal cover 8 connected with the other end of the connecting spring 7 through an adjusting mechanism;

the adjusting mechanism comprises an adjusting bolt 9 in threaded connection with the sealing cover 8, a movable plate 10 fixedly connected to the other end of the adjusting bolt 9, a first fixed locking groove 11 formed in the top of a nut of the adjusting bolt 9, a second fixed locking groove 12 formed in the outer side wall of the sealing cover 8, and the inner diameter of the first fixed locking groove 11 is matched with that of the second fixed locking groove 12, and the central axes of the first fixed locking groove and the second fixed locking groove coincide with each other.

The lip seal mounting seat 1 is provided with a plurality of pressure regulating devices along the circumferential direction, each pressure regulating device comprises a cavity extending along the axial direction, and the inner end of each cavity is communicated with the second through hole of the corresponding 4 lip type sealing ring through the first through hole formed in the lip seal mounting seat 1.

Piston 5 sets up in the cavity, and the screw thread has been seted up to piston 5's one end, and piston 5 sets up the opposite side that the screwed one end runs through to extend to lip type sealing washer 4, and surface threaded connection has nut 6, fixes lip type sealing washer 4 and piston 5 through nut 6.

The sealing cover 8 comprises a mounting plate and a sealing plate fixedly connected to the end face of the mounting plate, the outer diameter of the sealing plate is matched with the inner diameter of the cavity, and the cavity is sealed through the sealing plate.

Four groups of threaded holes 13 which are distributed at equal intervals in an annular mode are formed in the outer side wall of the mounting plate of the sealing cover 8, first fixing screws 14 are connected to the inner threads of the threaded holes 13, and the sealing cover 8 is fixed on the outer surface of the lip seal mounting seat 1 through the first fixing screws 14.

Including the second set screw, the external diameter size of second set screw and the internal diameter size phase-match of first solid locked groove 11, the tank bottom of second set screw is greater than the degree of depth of first solid locked groove 11 and the degree of depth of second solid locked groove 12, through the second set screw, runs through first solid locked groove 11 and second solid locked groove 12 in proper order to this will fix adjusting bolt 9.

The outer diameter of the movable plate 10 is equal to the inner diameter of the cavity, the movable plate 10 abuts against the connecting spring 7, and the position of the movable plate 10 is adjusted to adjust the compression amount of the connecting spring 7.

The working principle of the utility model is as follows: by additionally arranging the piston 5 on the back of the lip seal, when the pressure of a sealing cavity (a medium cavity) is changed, the lip seal can realize the balance of the radial force of the lip mouth under different sealing pressure conditions through an acting force transmission path of 'sealing medium pressure change → medium acting force change on the piston 5 → movable plate 10 acting on the back pressing force change of the lip seal → lip mouth holding force change → lip mouth radial force balance', avoid overlarge radial force of the lip mouth, prolong the service life of the lip seal, control the distance between the movable plate 10 and the sealing cover 8 by rotating the adjusting bolt 9, further adjust the compression amount of the connecting spring 7, and sequentially penetrate through the first fixing and locking groove 11 and the second fixing and locking groove 12 by the second fixing bolt after the adjustment is finished so as to fix the adjusting bolt 9 and further fix the movable plate 10, thereby facilitating the adjustment of the compression amount of the connecting spring 7 through the above operations, and the amount of adjustment is more accurate.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A lip seal for a piston-type flushometer, characterized by: the device comprises a lip seal mounting seat (1), a lip seal cover plate (2) arranged on the other side of the lip seal mounting seat (1), a fixing bolt (3) used for connecting the lip seal mounting seat (1) and the lip seal cover plate (2), a lip-shaped sealing ring (4) arranged between the lip seal mounting seat (1) and the lip seal cover plate (2), a piston (5) movably connected with the lip seal mounting seat (1), a connecting spring (7) connected with one end of the piston (5), and a sealing cover (8) connected with the other end of the connecting spring (7) through an adjusting mechanism;

the adjusting mechanism comprises an adjusting bolt (9) in threaded connection with the sealing cover (8), a movable plate (10) fixedly connected to the other end of the adjusting bolt (9), a first fixed locking groove (11) formed in the top of a nut of the adjusting bolt (9), and a second fixed locking groove (12) formed in the outer side wall of the sealing cover (8), wherein the inner diameter of the first fixed locking groove (11) is matched with the inner diameter of the second fixed locking groove (12), and the central axes of the first fixed locking groove and the second fixed locking groove coincide with each other.

2. The lip seal for a piston-type flushometer according to claim 1, characterized in that the lip seal mounting seat (1) is provided with a plurality of pressure regulating means in the circumferential direction, said pressure regulating means comprising an axially extending cavity, the inner end of which communicates with the second through-hole of the lip seal ring (4) via a first through-hole provided in the lip seal mounting seat (1).

3. The lip seal for a piston-type flushing valve according to claim 2, characterized in that the piston (5) is arranged in a cavity, one end of the piston (5) is threaded, the threaded end of the piston (5) extends through to the other side of the lip seal (4), and the outer surface is threaded with a nut (6).

4. A lip seal for a piston-type flushometer according to claim 3, characterized in that the sealing cover (8) comprises a mounting plate and a sealing plate fixedly attached to the end face of the mounting plate, the sealing plate having an outer diameter dimensioned to match the inner diameter of the cavity.

5. The lip seal for a piston-type flushing valve according to claim 4, characterized in that the outer side wall of the mounting plate of the sealing cover (8) is provided with four groups of threaded holes (13) distributed at equal intervals in a ring shape, and the threaded holes (13) are internally and threadedly connected with first fixing screws (14).

6. The lip seal for a piston-type flushing valve of claim 5, comprising a second set screw having an outer diameter dimension matching an inner diameter dimension of the first locking groove (11), the groove bottom of the second set screw being larger than the depth of the first locking groove (11) plus the depth of the second locking groove (12).

7. Lip seal for a piston-type flushing valve according to claim 6, characterized in that the outer diameter of the movable plate (10) is of the same size as the inner diameter of the cavity, the movable plate (10) abutting against the connecting spring (7).