CN213541347U - Hard-to-hard bidirectional butterfly valve - Google Patents

Abstract

The utility model discloses a hard-to-touch two-way butterfly valve, which relates to the technical field of butterfly valves and comprises a valve body, a valve rod, a valve seat, a butterfly plate, a sealing ring and a pressing plate, wherein an annular cavity is arranged inside the valve seat, a gap corresponding to the opening of the annular cavity is arranged on the valve body, one end of the gap is communicated with the annular cavity through a telescopic pipe, the other end of the gap is communicated with an air tap, an annular push plate is arranged in the annular cavity, and one end of the annular push plate extends to the gap; the valve seat is provided with a sealing ring, the valve seat is provided with a conical inclined surface, the sealing ring is provided with a conical inclined surface, the conical inclined surface corresponds to the valve seat, and the annular boss is arranged on one side of the valve seat on the valve body and is connected with the valve seat through a corrugated pipe. The utility model discloses have through directly set up the toroidal cavity on the disk seat and set up annular push pedal in it to when improving the reverse pressure-bearing of butterfly plate and the identical seal between the disk seat, simple structure, the effectual effect of two-way seal.

Description

Hard-to-hard bidirectional butterfly valve

Technical Field

The utility model relates to a butterfly valve technical field, more specifically say, it relates to a bump two-way butterfly valve hard.

Background

Most valves of the pipe network system are mainly used for cutting off and adjusting media, the valves account for large specific gravity and large using amount in the whole system, the valves are required to be high in durability and cost performance, meanwhile, the valves can be adjusted and cut off when the media flow in the forward direction, the media can be prevented from flowing backwards when differential pressure is changed or maintained, and the valves have a bidirectional cutting-off function. The butterfly valve is an important valve type, and has the advantages of reasonable structure, large flow area and energy conservation. When the butterfly valve is used at present, under the condition of forward sealing, the butterfly plate deforms towards the direction which is favorable for sealing under the action of medium force, the forward sealing performance is good generally, when the butterfly valve bears pressure reversely, the medium enables the butterfly plate to deform towards the direction which is unfavorable for sealing, the reverse pressure bearing capacity is poor, and the sealing effect is also poor.

If a chinese patent with patent publication No. CN102537381B discloses a two-way hard seal butterfly valve, including a valve body, a valve seat, a butterfly plate, a sealing ring, a pressing plate, the sealing ring is installed on the butterfly plate through the pressing plate, the inner wall of the valve body is provided with a rubber ring seat and a valve seat, a U-shaped rubber ring is installed in the annular cavity formed by the rubber ring seat, the valve seat and the valve body, a groove of the U-shaped rubber ring and the inner wall of the valve body form an annular seal cavity, a channel is provided on the valve body corresponding to the annular seal cavity, a connecting pipe communicated with the channel is provided on the valve body, a teflon seal ring is filled between the valve seat and the valve body, a teflon seal ring is filled between the inner wall of the rubber ring seat and the valve seat, an axial gap is left on the valve seat along the inner wall of the valve body, and a guide.

According to the technical scheme, water, hydraulic oil or nitrogen with certain pressure is used for filling the annular sealing cavity, and the pressed U-shaped rubber ring pushes the valve seat to move axially, so that reliable bidirectional hard sealing is realized. However, in the technical scheme, the cavity is arranged in the rubber ring and is independently arranged with the valve seat, so that the condition that the normal effect cannot be achieved due to pressure leakage is easy to occur, the structure is complex, and the manufacturing cost is high.

In view of the above problems, it is desirable to provide a hard-to-hard bidirectional butterfly valve which has a simple structure and can also achieve a reliable bidirectional hard sealing function.

Disclosure of Invention

To this problem in the practical application, the utility model aims to provide a bump two-way butterfly valve firmly, concrete scheme is as follows:

a hard-to-touch two-way butterfly valve comprises a valve body, a valve rod, a valve seat, a butterfly plate, a sealing ring and a pressing plate, wherein the valve seat is installed on the inner wall of the valve body, the sealing ring is installed on the butterfly plate through the pressing plate, the valve seat is installed on the inner wall of the valve body in a floating mode, an annular cavity is formed in the valve seat, a gap corresponding to the opening of the annular cavity is formed in the valve body, one end of the gap is communicated with the annular cavity through a telescopic pipe, the other end of the gap is communicated with an air nozzle, an annular push plate is arranged in the annular cavity, one end of the annular push plate extends to the gap, and a piston is arranged;

one end, close to the sealing ring, of the valve seat is set to be a conical inclined surface, one end, close to the valve seat, of the sealing ring is set to be a conical inclined surface corresponding to the valve seat, an annular boss is arranged on one side, located on the valve seat, of the valve body, and the annular boss is connected with the valve seat through a corrugated pipe.

Furthermore, one end of the annular push plate, which extends into the gap, is set as an extension end, and one end of the annular push plate, which is positioned in the annular cavity, is set as a push end, wherein,

the shape of the extending end is matched with the gap;

the shape of the pushing end is matched with that of the annular cavity;

the extension end is evenly provided with a plurality of groups along the circumference of the pushing end.

Furthermore, the annular cavity is of a cavity structure with an L-shaped section, and one end of the L-shaped structure, which is close to the sealing ring, is of an inclined cavity structure matched with the conical inclined surface of the valve seat.

Furthermore, the pushing end is of an L-shaped structure matched with the annular cavity, and the length of one end, close to the sealing ring, of the L-shaped structure of the pushing end is not larger than half of the length of one end, close to the sealing ring, of the annular cavity.

Furthermore, a limiting fixed seat is arranged on the other side of the valve seat on the valve body;

the side surface of one side of the limiting fixed seat, which faces the valve seat, is provided with a conical inclined surface, and the side surface of one side of the valve seat, which is close to the limiting fixed seat, is provided with a conical inclined surface corresponding to the limiting fixed seat.

Furthermore, the fixed limiting seat is connected with the valve seat through a guide pin, and the guide pin is used for limiting the movement of the valve seat along the circumferential direction of the valve seat.

Furthermore, sealing pieces are arranged at the connecting positions of the valve seat, the valve body and the telescopic pipe.

Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model discloses a directly set up the toroidal cavity and set up annular push pedal in it on the disk seat to when improving the reverse pressure-bearing of butterfly plate and the identical seal between the disk seat, simple structure, the both-way seal is effectual.

Drawings

Fig. 1 is a schematic front view of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;

fig. 3 is a partially enlarged view of the point B in fig. 2 according to the present invention.

Reference numerals: 1. a valve body; 2. a valve stem; 3. a valve seat; 4. a butterfly plate; 5. a seal ring; 6. pressing a plate; 7. an annular cavity; 8. a gap; 9. a telescopic pipe; 10. an air tap; 11. a ring-shaped push plate; 111. an extension end; 112. a pushing end; 12. a piston; 13. an annular boss; 14. a bellows; 15. a limiting fixed seat; 16. and a guide pin.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the embodiments of the present invention are not limited thereto.

As shown in fig. 1-3, a hard-to-hard two-way butterfly valve comprises a valve body 1, a valve rod 2, a valve seat 3, a butterfly plate 4, a seal ring 5 and a pressure plate 6, wherein the valve body 1 comprises a channel wall surface, the valve seat 3 is arranged on the inner wall of the channel wall surface of the valve body 1, and establish to float between the passageway wall of disk seat 3 and valve body 1 and install, butterfly plate 4 is connected with the linkage of valve rod 2, sealing washer 5 is installed on butterfly plate 4 through clamp plate 6, the one end that is close to sealing washer 5 on the disk seat 3 is established to the awl inclined plane, the one end that is close to disk seat 3 on the sealing washer 5 is established to the awl inclined plane corresponding with disk seat 3, the one side that is located disk seat 3 on the valve body 1 is provided with annular boss 13, annular boss 13 is connected with disk seat 3 through bellows 14, the one end that valve rod 2 extends valve body 1 is connected with operating device, operating device drives the rotation of valve rod 2, in order to realize opening and. Preferably, the operating mechanism can be a manual driving structure and an electric driving structure, wherein the manual driving structure adopts a handle and the like, and the electric driving structure adopts a motor and the like. Thus, the mutual pressure between the valve seat 3 and the sealing ring 5 is utilized and the reverse acting force of the corrugated pipe 14 is combined, so that the bidirectional sealing function of the butterfly valve can be basically realized.

An annular cavity 7 is formed in the valve seat 3, a gap 8 corresponding to an opening of the annular cavity 7 is formed in the valve body 1, one end of the gap 8 is communicated with the annular cavity 7 through a telescopic pipe 9, the other end of the gap is communicated with an air tap 10, an annular push plate 11 is arranged in the annular cavity 7, one end of the annular push plate 11 extends to the gap 8, and a piston 12 is arranged at one end entering the gap 8. Preferably, the piston 12 is connected to the valve body 1 by a seal, which may be a high temperature resistant seal 5, such as a teflon seal. Like this, when butterfly plate 4 bears the backpressure, through air cock 10 towards punching press in clearance 8 for piston 12 removes towards the direction of being close to disk seat 3, drives whole annular push pedal 11 simultaneously and removes and extrude disk seat 3 towards the direction of disk seat 3, makes disk seat 3 along the axial displacement of 1 inner walls of valve body right, in order to compensate butterfly plate 4 the elastic deformation of production makes the sealed face of disk seat 3 and sealing washer 5 coincide the extrusion, seals with the reverse pressure-bearing of guaranteeing the butterfly valve, under normal two-way seal, has strengthened the sealed effect when reverse seal.

One end of the annular push plate 11, which extends into the gap 8, is set as an extension end 111, and one end of the annular push plate 11, which is positioned in the annular cavity 7, is set as a pushing end 112, wherein the shape of the extension end 111 is matched with that of the gap 8; the shape of the pushing end 112 matches the shape of the annular cavity 7; the extension ends 111 are uniformly provided with a plurality of groups along the circumferential direction of the pushing end 112. Preferably, the extension end 111 and the gap 8 are provided with a cylindrical structure, and the pushing end 112 is provided with an annular plate-shaped structure, so as to ensure that the whole structure is normally realized in function. Meanwhile, as the extension end 111 is uniformly provided with a plurality of groups along the circumferential direction of the pushing end 112, the pushing end 112 can uniformly extrude the valve seat 3, and the valve seat 3 and the sealing ring 5 are extruded in a matched manner at all angles.

The annular cavity 7 is of a cavity structure with an L-shaped section, and one end of the L-shaped structure, which is close to the sealing ring 5, is of an inclined cavity structure matched with the conical inclined surface of the valve seat 3. The pushing end 112 is provided with an L-shaped structure matched with the annular cavity 7, and the length of one end, close to the sealing ring 5, of the L-shaped structure of the pushing end 112 is not more than half of the length of one end, close to the sealing ring 5, of the annular cavity 7. Preferably, the L-shaped structures of the annular cavity 7 and the pushing end 112 are both bent structures with an angle greater than 90 ° to fit the conical slope of the valve seat 3. Like this, can guarantee annular push pedal 11 and valve seat 3 phase-match, when guaranteeing that annular push pedal 11 exerts the effect of power to valve seat 3, the power is concentrated and is exerted in 3 right-hand members of valve seat to guarantee the normal effect of remedying of power.

A limiting fixed seat 15 is arranged on the other side of the valve seat 3 on the valve body 1; the side surface of one side of the limiting fixed seat 15, which faces the valve seat 3, is set to be a conical inclined surface, and the side surface of one side of the valve seat 3, which is close to the limiting fixed seat 15, is set to be a conical inclined surface corresponding to the limiting fixed seat 15. Wherein, spacing fixing base 15 establishes to the annular structure of adaptation valve body 1 inner wall to fixed set up in on the valve body 1 inner wall. And, preferably, spacing fixing base 15 adopts hard high temperature resistant material. Like this, when butterfly plate 4 bears forward or backpressure, disk seat 3 receives reaction force, when appearing moving along 1 width direction of valve body, spacing fixing base 15 not only can restrict disk seat 3's sliding distance, simultaneously because spacing fixing base 15 establishes to the awl inclined plane with the opposite face of disk seat 3, when disk seat 3 and spacing fixing base 15 clash each other, slant reaction force is applyed to disk seat 3 to spacing fixing base 15, can strengthen butterfly plate 4 equally when bearing backpressure, the leakproofness between butterfly plate 4 and the disk seat 3.

The fixed limit seat is connected with the valve seat 3 through a guide pin 16, and the guide pin 16 is used for limiting the movement of the valve seat 3 along the circumferential direction. The guide pin 16 is arranged to prevent the valve seat 3 from sliding along the inner wall of the valve body 1 in the circumferential direction due to vibration during use.

And sealing sheets are arranged at the connecting positions of the valve seat 3, the valve body 1 and the telescopic pipe 9. Preferably, a high-temperature-resistant sealing material such as a polytetrafluoroethylene sealing material is also used for the sealing sheet. The telescopic pipe 9 is used for satisfying the movement of the valve seat 3 along the circumferential direction and the axial direction, and the sealing piece is arranged to ensure the sealing performance of the telescopic pipe 9 when the telescopic pipe 9 is connected with the valve seat 3 and the valve body 1.

The utility model discloses a concrete implementation principle does: when the butterfly plate 4 bears the positive pressure, the gap 8 does not need to be pressurized, the sealing ring 5 with the triple eccentric structure is screwed into the valve seat 3, and the elastic deformation generated by the butterfly plate 4 bearing the positive pressure is beneficial to the sealing of the butterfly valve; when butterfly plate 4 bears reverse pressure, pressurize in clearance 8 through air cock 10, pressurized piston 12 promotes annular push pedal 11 and removes towards the direction of sealing washer 5, and extrude disk seat 3, make disk seat 3 along 1 inner wall of valve body axial displacement right, in order to compensate the elastic deformation that butterfly plate 4 produced, make disk seat 3 coincide with the sealed face extrusion of sealing washer 5, in order to guarantee that the reverse pressure-bearing of butterfly valve is sealed, the two-way seal structure of whole butterfly valve is simple, and the manufacturing is convenient, the two-way sealed effect of improvement butterfly valve that simultaneously can be fine.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (7)

1. The utility model provides a bump two-way butterfly valve hard, includes valve body (1), valve rod (2), disk seat (3), butterfly plate (4), sealing washer (5) and clamp plate (6), disk seat (3) install in on valve body (1) inner wall, install through clamp plate (6) sealing washer (5) on butterfly plate (4), its characterized in that, disk seat (3) float install in on the inner wall of valve body (1), just annular cavity (7) have been seted up to the inside of disk seat (3), set up on valve body (1) with the corresponding clearance (8) of opening of annular cavity (7), the one end of clearance (8) through flexible pipe (9) with annular cavity (7) intercommunication, the other end intercommunication has air cock (10), establish annular push pedal (11) in annular cavity (7), the one end of annular push pedal (11) extends to clearance (8), and one end entering the gap (8) is provided with a piston (12);

the improved valve is characterized in that one end, close to the sealing ring (5), of the valve seat (3) is arranged to be a conical inclined surface, one end, close to the valve seat (3), of the sealing ring (5) is arranged to be a conical inclined surface corresponding to the valve seat (3), the valve body (1) is arranged on one side of the valve seat (3) and provided with an annular boss (13), and the annular boss (13) is connected with the valve seat (3) through a corrugated pipe (14).

2. A hard two-way butterfly valve according to claim 1, characterised in that the end of the annular push plate (11) extending into the gap (8) is designated as an extension end (111) and the end of the annular push plate (11) located in the annular cavity (7) is designated as a push end (112), wherein,

the shape of the extension end (111) matches the gap (8);

the shape of the pushing end (112) is matched with that of the annular cavity (7);

the extension end (111) is uniformly provided with a plurality of groups along the circumferential direction of the pushing end (112).

3. The hard-to-hard bidirectional butterfly valve according to claim 2, wherein the annular cavity (7) is a cavity structure with an L-shaped cross section, and one end of the L-shaped cavity structure close to the sealing ring (5) is a slant cavity structure matched with the conical slope of the valve seat (3).

4. The hard-to-hard two-way butterfly valve according to claim 3, wherein the pushing end (112) is provided with an L-shaped structure matched with the annular cavity (7), and the length of one end, close to the sealing ring (5), of the L-shaped structure of the pushing end (112) is not more than half of the length of one end, close to the sealing ring (5), of the annular cavity (7).

5. The hard-to-hard bidirectional butterfly valve according to claim 1, wherein a limit fixing seat (15) is arranged on the valve body (1) at the other side of the valve seat (3);

the side surface of one side of the limiting fixed seat (15) facing the valve seat (3) is provided with a conical inclined surface, and the side surface of one side of the valve seat (3) close to the limiting fixed seat (15) is provided with a conical inclined surface corresponding to the limiting fixed seat (15).

6. A hard-on-hard two-way butterfly valve according to claim 5, characterized in that the limit fixing seat (15) is connected with the valve seat (3) through a guide pin (16), and the guide pin (16) is used for limiting the movement of the valve seat (3) along the circumferential direction.

7. The hard-to-hard two-way butterfly valve according to claim 1, characterized in that sealing plates are arranged at the connecting positions of the valve seat (3) and the valve body (1) and the telescopic pipe (9).

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