CN115143291A

CN115143291A - Bidirectional sealing butterfly valve

Info

Publication number: CN115143291A
Application number: CN202210851977.9A
Authority: CN
Inventors: 陈永裁; 陈永煌; 项秀莲; 王志欢; 宋冯欢
Original assignee: Bsg Fluid Technology Co ltd
Current assignee: Bsg Fluid Technology Co ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-10-04

Abstract

The invention discloses a two-way sealing butterfly valve, and particularly relates to the relevant technical field of butterfly valves. The bidirectional sealing butterfly valve can ensure the sealing performance of the butterfly valve plate after being closed, realizes bidirectional sealing, has obvious improvement on the sealing effect and the reliability compared with the traditional butterfly valve, and utilizes water pressure to apply force along the closing state of the valve to a gear along with the increase of the side pressure of water inlet when the valve is turned from the opening state to the closing state by arranging the auxiliary closing component, thereby avoiding the leakage of the valve and further improving the sealing effect.

Description

Bidirectional sealing butterfly valve

Technical Field

The invention relates to the technical field of butterfly valves, in particular to a bidirectional sealing butterfly valve.

Background

A butterfly valve, also called a flap valve, is a regulating valve with simple structure, and can be used for on-off control of low-pressure pipeline media, namely a valve with a closing part (valve clack or butterfly plate) as a disc and rotating around a valve shaft to achieve opening and closing.

At present, in the design of a known butterfly valve, a sealing pair structure of the butterfly valve is almost sealed through a soft sealing structure (a sealing ring form), however, after the butterfly valve is used for a long time, the problems of internal leakage, poor sealing effect, short service life and the like easily occur, the existing butterfly valve cannot be screwed more and more tightly when being closed, when the valve is in a closed state, reverse pressure can cause the butterfly plate to be pushed reversely to cause leakage, and the effect of bidirectional sealing of a pipeline cannot be achieved, so that the butterfly valve with the bidirectional sealing function is provided.

Disclosure of Invention

The invention mainly aims to provide a bidirectional sealing butterfly valve which can effectively solve the problems that the existing butterfly valve is easy to leak inwards and cannot achieve the bidirectional sealing effect.

In order to achieve the purpose, the invention adopts the technical scheme that:

a two-way sealing butterfly valve comprises a valve body, wherein a function box is arranged at the top of the valve body, an auxiliary closing component for assisting in closing the valve is arranged inside the function box, a valve rod is arranged in the middle of the function box and the valve body, a driving device for controlling the valve rod to rotate is arranged at the top of the valve rod, a disc plate fixedly connected with the valve rod is arranged in the middle of the valve body, an elastic sealing system is arranged on the water inlet side of the disc plate, and a butterfly valve component and a connecting component for controlling the butterfly valve component to open and close are arranged on the water outlet side of the disc plate;

specifically, the auxiliary tightening component is used for applying thrust in the direction of closing the butterfly valve to the valve rod by using water pressure on the water inlet side when the butterfly valve is in a closed state, the butterfly valve component is controlled by the connecting component to be synchronously closed and sealed when the butterfly plate is in the closed state, and the butterfly valve component is controlled by the connecting component to be synchronously opened when the butterfly plate is in an open state.

Preferably, the elastic sealing system comprises two water inlet side sliding chutes arranged at the top and the bottom of the inner wall of the valve body and a stop plate arranged between the two water inlet side sliding chutes in a sliding manner, and buffer springs fixedly connected with the stop plate are arranged in the two water inlet side sliding chutes;

the barrier plate is including intaking the side ring board, the top and the bottom of intaking the side ring board all are equipped with into water side slide, and two intake side slide respectively slidable mounting intake between the side spout, two buffer spring fixed connection is respectively intake the one end that the dish board was kept away from to the side spout, the inner chamber middle part of intaking the side ring board is equipped with two mutual perpendicularity and integrated into one piece's well core plate, and junction between two well core plates is equipped with the disk, the one end that the side ring board of intaking is close to the dish board is equipped with into water side sealing washer.

Preferably, the connecting assembly comprises two water outlet side sliding grooves arranged at the top and the bottom of the inner wall of the valve body, a connecting plate arranged between the two water outlet side sliding grooves in a sliding manner, and a connecting piece arranged between the connecting plate and the butterfly valve assembly;

the connecting plate comprises a water outlet side annular plate, a water outlet side sliding plate used for being matched with a water outlet side sliding groove is fixedly installed at the top and the bottom of the water outlet side annular plate, a fixing plate in the horizontal direction is fixedly installed in the middle of one end, close to the disc plate, of the water outlet side annular plate, a T-shaped sliding groove is formed in the middle of the fixing plate, a T-shaped sliding block is installed in the T-shaped sliding groove in a sliding mode, one end, far away from the fixing plate, of the T-shaped sliding block is rotatably connected with the disc plate, and a vertical rod is arranged in the middle of an inner cavity of the water outlet side annular plate;

the connecting piece includes fixed mounting in the horizontal plate at pole setting middle part, the one end that the pole setting was kept away from to the horizontal plate is rotated and is installed two first fixed arms, and the one end that the horizontal plate was kept away from to every first fixed arm all rotates and installs the second fixed arm.

Preferably, the one end outside that the dish board is close to the dish board is kept away from to play water side ring plate is equipped with C style of calligraphy sealing washer, and one side of C style of calligraphy sealing washer is equipped with the breach that holds the fixed plate.

Preferably, the butterfly valve subassembly includes the axostylus axostyle of vertical fixed mounting at the valve body middle part, the surface upper portion and the lower part of axostylus axostyle all are equipped with the stationary blade, and equal fixedly connected with can follow the axostylus axostyle on the stationary blade and be the axle center pivoted butterfly valve block, two the one end that the butterfly valve block is close to each other all is equipped with central sealing pad, and two the one end that the butterfly valve block is close to coupling assembling all is equipped with the connecting seat of using with the cooperation of second fixed arm.

Preferably, one end of the butterfly valve plate, which is close to the connecting assembly, is provided with two semi-annular sealing rings, the inner wall of the valve body is provided with a sealing pair matched with the semi-annular sealing rings for use, and the contact surfaces of the sealing pair and the semi-annular sealing rings are all arranged to be inclined planes.

Preferably, supplementary tight subassembly of shutting is including the inlet tube of joint between valve body and function box, and the inlet tube is close to the one end of function box and extends to the function box inner chamber, the inlet tube be located the function box the partial inner chamber be equipped with the piston and with piston fixed connection's dead lever, and the dead lever runs through the inlet tube and extends to the function box in, piston and inlet tube are located and are equipped with coil spring between the one end inner wall of function box, the one end that the inlet tube was kept away from to the dead lever is equipped with the base, and the top of base is equipped with the rack, the partial surface middle part that the valve rod is located the function box is equipped with the gear, and rack and gear engagement.

Preferably, the elastic force provided by the spiral spring is equal to the water pressure value in the valve body when the butterfly valve is in the opening state.

Preferably, the both sides of valve body all are equipped with the flange that is used for installing the valve body, and are in the installation state, and the rivers direction is along the directional butterfly valve subassembly of dish board.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the butterfly valve, the connecting assembly and the butterfly valve assembly are arranged, after the valve is closed, the disc plate rotates by taking the valve rod as an axis, so that the disc plate is separated from the water inlet side sliding groove, the water inlet side sliding groove is pushed to move towards the disc plate under the action of the elastic force of the buffer spring and the water inlet pressure of the water inlet side, the water inlet side sliding groove is made to be tightly attached to the disc plate, a better sealing effect can be achieved by matching the water inlet side sealing ring and the disc plate, meanwhile, the connecting plate can be pulled back by matching the second fixing arm and the first fixing arm, the C-shaped sealing ring is made to be tightly attached to the disc plate, a sealing effect is achieved, at the moment, the second fixing arms mutually connected are located on the same straight line with the first fixing arm, namely, the second fixing arm is in a completely tightened state, the sealing performance after the butterfly valve block is closed is guaranteed, the bidirectional sealing is achieved, and compared with the traditional butterfly valve, the sealing effect and the reliability of the butterfly valve are remarkably improved.

2. The auxiliary closing component is arranged, when the valve is in an opening state, the pressure of water at the water inlet side can not move the pushing fixed rod, the pushing fixed rod is in a stable state, when the valve is turned to a closing state from the opening state, the spiral spring can be contracted along with the increase of the pressure at the water inlet side, so that the fixed rod, the base and the rack are pushed to the gear, the water pressure is utilized to apply a force along the closing state of the valve to the gear, the leakage of the valve is avoided, and the sealing effect is further improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention in a closed state;

FIG. 3 is a cross-sectional view of the present invention in the closed position;

FIG. 4 is a schematic view of the overall structure of the barrier plate of the present invention;

FIG. 5 is a schematic view of the internal structure of the present invention in the open state;

FIG. 6 is a cross-sectional view of the present invention in the open position;

FIG. 7 is a schematic view of the connection plate and the connection member of the present invention;

FIG. 8 is a schematic view of the overall structure of the connector of the present invention;

FIG. 9 is a schematic view of the overall structure of the butterfly valve assembly of the present invention;

FIG. 10 is an enlarged view of the structure of FIG. 6 at A in accordance with the present invention;

FIG. 11 is a schematic view of the connection assembly, butterfly valve assembly and disk plate of the present invention;

FIG. 12 is a schematic view showing the internal structure of the functional compartment of the present invention;

fig. 13 is an enlarged view of the structure at B in fig. 12 according to the present invention.

In the figure: 1. a valve body; 11. a sealing pair; 2. a function box; 3. an auxiliary cinching assembly; 31. a water inlet pipe; 32. a piston; 33. fixing the rod; 34. a coil spring; 35. a base; 36. a rack; 37. a gear; 4. a valve stem; 5. a drive device; 6. a plate; 7. an elastomeric sealing system; 71. a blocking plate; 711. a water inlet side ring plate; 712. a water inlet side sliding plate; 713. a center plate; 714. a wafer; 715. a water inlet side sealing ring; 72. a water inlet side chute; 73. a buffer spring; 8. a connecting assembly; 81. a water outlet side chute; 82. a connecting plate; 821. a water outlet side ring plate; 822. a fixing plate; 823. a T-shaped slider; 824. a water outlet side sliding plate; 825. c-shaped sealing rings; 826. erecting a rod; 83. a connecting member; 831. a horizontal plate; 832. a first fixed arm; 833. a second fixed arm; 9. a butterfly valve assembly; 91. a shaft lever; 92. a butterfly valve plate; 93. a fixing sheet; 94. a semi-annular seal ring; 95. a central seal pad; 96. a connecting seat.

Detailed Description

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

Example one

As shown in fig. 1, the embodiment discloses a bidirectional sealing butterfly valve, which includes a valve body 1, wherein flanges for mounting the valve body 1 are disposed on both sides of the valve body 1, and in a mounted state, a water flow direction is directed to a butterfly valve assembly 9 along a butterfly plate 6, a function box 2 is disposed on the top of the valve body 1, valve rods 4 are disposed in the middle of the function box 2 and the valve body 1, a driving device 5 for controlling the rotation of the valve rods 4 is disposed on the top of the valve rods 4, the butterfly plate 6 fixedly connected to the valve rods 4 is disposed in the middle of the valve body 1, an elastic sealing system 7 is disposed on a water inlet side of the butterfly plate 6, and a butterfly valve assembly 9 and a connecting assembly 8 for controlling the opening and closing of the butterfly valve assembly 9 are disposed on a water outlet side of the butterfly plate 6; wherein, the rotation of the valve rod 4 is controlled by the driving device 5, which is the conventional design of the butterfly valve in the prior art, and the driving is manual driving in the figure, and can also be electromagnetic driving, and the details are not described here;

in addition, in practice, when the disc plate 6 is in a closed state, the butterfly valve assembly 9 is controlled through the connecting assembly 8 to enable the butterfly valve assembly 9 to be synchronously closed and sealed, and when the disc plate 6 is in an open state, the butterfly valve assembly 9 is controlled through the connecting assembly 8 to enable the butterfly valve assembly 9 to be synchronously opened.

In order to realize that the butterfly valve can be sealed by the elastic sealing system 7 after being closed, as shown in fig. 2, the elastic sealing system 7 comprises two water inlet side sliding chutes 72 arranged at the top and the bottom of the inner wall of the valve body 1 and a blocking plate 71 slidably mounted between the two water inlet side sliding chutes 72, wherein the two water inlet side sliding chutes 72 are symmetrical about the axis of the valve body 1, so that the blocking plate 71 can accept and accept uniformly, sliding is facilitated, abrasion is reduced at the same time, and buffer springs 73 fixedly connected with the blocking plate 71 are arranged in the two water inlet side sliding chutes 72; when the butterfly valve is closed, the buffer spring 73 is in a compressed state, the blocking plate 71 and the disc plate 6 can be tightly attached to each other by utilizing the elastic force provided by the buffer spring 73, so that a sealing effect is achieved, in addition, as can be seen from the figure 3, when the butterfly valve is in a closed state, water enters from the left side of the blocking plate 71, and under the action of water pressure, the blocking plate 71 is further tightly attached to the disc plate 6 for sealing.

In order to achieve a better sealing effect, as shown in fig. 4, the blocking plate 71 includes a water inlet side ring plate 711, water inlet side sliding plates 712 are disposed at the top and the bottom of the water inlet side ring plate 711, the two water inlet side sliding plates 712 are slidably mounted between the two water inlet side sliding grooves 72 respectively, and the two buffer springs 73 are fixedly connected to one ends of the two water inlet side sliding grooves 72 away from the disc plate 6 respectively, so that the blocking plate 71 can slide in the valve body 1 and the water inlet side ring plate 711 can be tightly attached to the disc plate 6 by using the elastic force of the buffer springs 73, so as to seal, in addition, a water inlet side sealing ring 715 is disposed at one end of the water inlet side ring plate 711 close to the disc plate 6, and after tight attachment, the water inlet side sealing ring 715 can be matched with the disc plate 6 to achieve a better sealing effect;

furthermore, the middle part of the inner cavity of the water inlet side ring plate 711 is provided with two central plates 713 which are mutually perpendicular and integrally formed, the connecting part between the two central plates 713 is provided with the wafer 714, and the wafer 714 and the central plate 713 are utilized, so that the water pressure of the water inlet side is utilized to push the water inlet side ring plate 711 while the influence degree on water flow is small, and a further sealing effect is achieved.

In order to achieve the effect of bidirectional sealing, as shown in fig. 9, the butterfly valve assembly 9 of the present invention includes a shaft rod 91 vertically and fixedly installed in the middle of the valve body 1, fixing pieces 93 are respectively installed on the upper portion and the lower portion of the outer surface of the shaft rod 91, and butterfly valve plates 92 capable of rotating around the shaft rod 91 are respectively and fixedly connected to the fixing pieces 93, in practice, when the disk plate 6 rotates, the connecting assembly 8 drives the two butterfly valve plates 92 to rotate around the shaft rod 91, so as to open and close the butterfly valve plates 92;

in order to ensure the sealing performance between the two butterfly valve plates 92 in the closed state, the central sealing gaskets 95 are arranged at the ends, close to each other, of the two butterfly valve plates 92, so that when the butterfly valve plates 92 are closed, the two central sealing gaskets 95 are attached to each other, the central sealing gaskets 95 between the butterfly valve plates 92 can achieve a sealing effect, and water leakage is avoided.

Further, one end of the butterfly valve plate 92 close to the connecting component 8 is provided with two semi-annular sealing rings 94, the inner wall of the valve body 1 is provided with a sealing pair 11 matched with the semi-annular sealing rings 94 for use, and the contact surfaces of the sealing pair 11 and the semi-annular sealing rings 94 are all set to be inclined surfaces, wherein the sealing pair 11 is fixed on the inner wall of the valve body 1, and when the butterfly valve plate 92 is in a closed state, the semi-annular sealing rings 94 are attached to the inclined surfaces of the sealing pair 11 to maintain the sealing between the butterfly valve plate 92 and the side wall of the valve body 1.

In order to facilitate the control of the butterfly valve assembly 9 by using the disc plate 6 and the connecting assembly 8, as shown in fig. 6, the connecting assembly 8 includes two water outlet side chutes 81 disposed at the top and bottom of the inner wall of the valve body 1, a connecting plate 82 slidably mounted between the two water outlet side chutes 81, and a connecting member 83 disposed between the connecting plate 82 and the butterfly valve assembly 9; wherein, the connecting plate 82 is connected with the dish plate 6, when the dish plate 6 is closed, the connecting plate 82 is close to the dish plate 6 by pulling the dish plate 6, thereby the connecting piece 83 is used for closing and sealing the two butterfly valve plates 92.

Further, as shown in fig. 7, 8 and 11, the connection plate 82 includes a water outlet side ring plate 821, a water outlet side sliding plate 824 for cooperating with the water outlet side sliding groove 81 is fixedly installed at the top and the bottom of the water outlet side ring plate 821, a horizontal fixing plate 822 is fixedly installed in the middle of one end of the water outlet side ring plate 821 close to the disc plate 6, a T-shaped sliding groove is formed in the middle of the fixing plate 822, a T-shaped sliding block 823 is slidably installed in the T-shaped sliding groove, one end of the T-shaped sliding block 823 far away from the fixing plate 822 is rotatably connected with the disc plate 6, and a vertical rod 826 is arranged in the middle of an inner cavity of the water outlet side ring plate 821; wherein, T shape slider 823 rotates to be connected at the edge that dish board 6 is close to the one end of connecting plate 82, and when dish board 6 opened or closed, T shape slider 823 can slide in fixed plate 822 to the position of usable dish board 6 control connection board 82, and then realize opening and closing of control butterfly valve piece 92 through connecting piece 83.

And connecting piece 83 includes the horizontal plate 831 of fixed mounting in pole setting 826 middle part, the one end that the pole setting 826 was kept away from to horizontal plate 831 rotates and installs two first fixed arms 832, and the one end that every first fixed arm 832 kept away from horizontal plate 831 all is equipped with second fixed arm 833, two butterfly valve block 92 are close to the one end of coupling assembling 8 and all are equipped with the connecting seat 96 of using with the cooperation of second fixed arm 833, second fixed arm 833 rotates with connecting seat 96 and is connected promptly, and connecting seat 96 is installed in the middle part of butterfly valve block 92, can make butterfly valve block 92 realize opening and closing through second fixed arm 833.

When the two butterfly valve plates 92 are switched between the closed state and the open state, the displacement of the butterfly valve plates 92 in the horizontal direction is certainly smaller than the radius of the disk plate 6, so the second fixing arm 833 is connected with the first fixing arm 832 in a movable connection manner, and the lengths of the second fixing arm 833 and the first fixing arm 832 are such that when the disk plate 6 and the butterfly valve plates 92 are closed, the second fixing arms 833 connected with each other are in the same straight line with the first fixing arm 832;

therefore, under the condition, after the dish plate 6 is opened, even if the distance that the water outlet side ring plate 821 moves is greater than the displacement of the connecting seat 96 in the horizontal direction, a certain included angle can be formed between the second fixing arm 833 and the first fixing arm 832 which are rotatably connected, so that the butterfly valve sheet 92 can be opened to the maximum state without influencing the flow of water, and simultaneously, the butterfly valve assembly 9 can be opened and closed by matching the dish plate 6 with the connecting assembly 8.

In order to further improve the leakproofness between play water side ring plate 821 and the dish board 6, it is equipped with C style of calligraphy sealing washer 825 to go out the one end outside that water side ring plate 821 kept away from dish board 6 and is close to dish board 6, and one side of C style of calligraphy sealing washer 825 is equipped with the breach that holds fixed plate 822, when dish board 6 is in the closed condition, dish board 6 is hugged closely to usable C style of calligraphy sealing washer 825, reach sealed effect, and through being provided with C style of calligraphy sealing washer 825 that has certain elasticity, when closing the butterfly valve, can make coupling assembling 8 hug closely connecting plate 82 all the time, reach excellent sealed effect.

It should be noted that, in this embodiment, in addition to the buffer spring 73, the elastic sealing system 7, the connecting assembly 8 and the butterfly valve assembly 9 are made of PEEK material.

PEEK (polyetheretherketone) is a high polymer composed of repeating units containing one ketone bond and two ether bonds in a main chain structure, and belongs to a special high polymer material. Has the physical and chemical properties of high temperature resistance, chemical corrosion resistance and the like, is a semi-crystalline polymer material, can be used as a high temperature resistant structural material and an electrical insulating material, and can be compounded with glass fiber or carbon fiber to prepare a reinforcing material. Generally, a polyaryl ether high polymer obtained by condensation with aromatic dihydric phenol is adopted. The elastic sealing system 7, the connecting assembly 8 and the butterfly valve assembly 9 made of polyether-ether-ketone are not easy to corrode, and have high mechanical strength and long service life.

The specific implementation scenario of this embodiment is as follows:

when the butterfly valve is opened from a closed state: only the valve rod 4 needs to be rotated through the driving device 5, so that the disc plate 6 rotates by 90 degrees, in the process, as the disc plate 6 rotates by taking the valve rod 4 as an axis, a force in the water inlet direction can be applied to the blocking plate 71 through the disc plate 6, the buffer spring 73 is contracted, and meanwhile, the T-shaped sliding block 823 can slide in the fixing plate 822, so that the position of the connecting plate 82 can be controlled by the disc plate 6 to move to one side of the butterfly valve assembly 9, and therefore the two butterfly valve plates 92 are pushed to be opened;

when the butterfly valve is changed from the opening state to the closing state: only the valve rod 4 needs to be rotated by the driving device 5, and the valve rod rotates 90 degrees along the closing direction of the valve, in this process, because the disc plate 6 rotates by taking the valve rod 4 as an axis, the disc plate 6 is separated from the water inlet side sliding chute 72, under the action of the elastic force of the buffer spring 73 and the water inlet pressure of the water inlet side, the water inlet side sliding chute 72 is pushed to move towards the disc plate 6, and the water inlet side sliding chute 72 is enabled to be tightly attached to the disc plate 6, a better sealing effect can be achieved by matching the water inlet side sealing ring 715 with the disc plate 6, meanwhile, through the matching of the second fixing arm 833 and the first fixing arm 832, the connecting plate 82 can be pulled back by the disc plate 6, and the C-shaped sealing ring 825 is enabled to be tightly attached to the disc plate 6, so as to achieve the sealing effect, at this time, the second fixing arm 833 mutually connected with each other is located on the same straight line with the first fixing arm 832, namely, in a completely tightened state, and the sealing performance after the butterfly valve sheet 92 is closed is ensured.

Example two

The embodiment is realized on the basis of the first embodiment, the same parts of the first embodiment are not explained, and the difference between the first embodiment and the second embodiment is that an auxiliary closing component 3 for assisting in closing the valve is arranged in the functional box 2, specifically, the auxiliary closing component 3 is used for applying thrust in the direction of closing the butterfly valve to the valve rod 4 by using water pressure at the water inlet side when the butterfly valve is in the closed state, so that the butterfly valve disclosed by the invention is always ensured to be in the closed state, and the possibility of leakage is reduced.

Specifically, as shown in fig. 12 and 13, the auxiliary tightening assembly 3 includes a water inlet pipe 31 connected between the valve body 1 and the function box 2, and one end of the water inlet pipe 31 close to the function box 2 extends into an inner cavity of the function box 2, water in the valve body 1 can enter the water inlet pipe 31, a part of the inner cavity of the water inlet pipe 31 in the function box 2 is provided with a piston 32 and a fixing rod 33 fixedly connected with the piston 32, the fixing rod 33 extends into the function box 2 through the water inlet pipe 31, a coil spring 34 is arranged between inner walls of one ends of the piston 32 and the water inlet pipe 31 in the function box 2, one end of the fixing rod 33 far away from the water inlet pipe 31 is provided with a base 35, a rack 36 is arranged at the top of the base 35, a gear 37 is arranged in the middle of a part of an outer surface of the valve rod 4 in the function box 2, and the rack 36 is engaged with the gear 37.

It should be noted that, in this embodiment, the elastic force provided by the coil spring 34 is equal to the water pressure value in the valve body 1 when the butterfly valve is in the open state, that is, it is ensured that the pressure of the water at the water inlet side does not move to push the fixing rod 33 when the valve is in the open state, and when the valve is closed, the coil spring 34 is compressed to move the fixing rod 33 because the pressure at the water inlet side is increased.

The specific implementation scenario of this embodiment is as follows: when the valve is in an open state, the pressure of water at the water inlet side can not push the fixed rod 33 to move, the fixed rod is in a stable state, when the valve is turned from the open state to the closed state, the spiral spring 34 can be contracted along with the increase of the pressure at the water inlet side, so that the fixed rod 33, the base 35 and the rack 36 are pushed to the gear 37, the gear 37 is applied with a force along the closed state of the valve by using the water pressure, the leakage of the valve is avoided, and the sealing effect is further improved. In addition, when the disc plate 6 is in the closed state, the C-shaped sealing ring 825 is tightly attached to the disc plate 6 and blocks the disc plate 6 by the water outlet side chute 81, so that the attaching degree of the C-shaped sealing ring 825 and the disc plate 6 is further improved.

The foregoing shows and describes the general principles and features of the present invention, together with the 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 invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a two way seal butterfly valve, includes valve body (1), its characterized in that: the valve is characterized in that a function box (2) is arranged at the top of the valve body (1), an auxiliary tight closing component (3) for assisting in tightly closing a valve is arranged inside the function box (2), a valve rod (4) is arranged in the middle of the function box (2) and the valve body (1), a driving device (5) for controlling the rotation of the valve rod (4) is arranged at the top of the valve rod (4), a disc plate (6) fixedly connected with the valve rod (4) is arranged in the middle of the valve body (1), an elastic sealing system (7) is arranged on the water inlet side of the disc plate (6), and a butterfly valve component (9) and a connecting component (8) for controlling the opening and closing of the butterfly valve component (9) are arranged on the water outlet side of the disc plate (6);

specifically, supplementary tight subassembly (3) of closing is used for utilizing the water pressure of the side of intaking to exert the thrust of closing the butterfly valve direction for valve rod (4) under the butterfly valve is in the closed condition, dish board (6) are through coupling assembling (8) control butterfly valve subassembly (9) when closed condition and make butterfly valve subassembly (9) close sealedly in step, dish board (6) are through coupling assembling (8) control butterfly valve subassembly (9) when open condition and make butterfly valve subassembly (9) open in step.

2. A bi-directional sealing butterfly valve according to claim 1, wherein: the elastic sealing system (7) comprises two water inlet side sliding chutes (72) arranged at the top and the bottom of the inner wall of the valve body (1) and a blocking plate (71) installed between the two water inlet side sliding chutes (72) in a sliding manner, and buffer springs (73) fixedly connected with the blocking plate (71) are arranged in the two water inlet side sliding chutes (72);

the baffle (71) including intaking side ring board (711), the top and the bottom of intaking side ring board (711) all are equipped with into water side slide board (712), and two intake side slide board (712) sliding installation respectively between two intake side spout (72), two buffer spring (73) fixed connection respectively is in the one end that dish board (6) were kept away from in two intake side spout (72), the inner chamber middle part of intaking side ring board (711) is equipped with two mutually perpendicular and integrated into one piece's well board (713), and the junction between two well board (713) is equipped with disk (714), the one end that intakes side ring board (711) is close to dish board (6) is equipped with into water side sealing washer (715).

3. A bi-directional sealing butterfly valve according to claim 1, wherein: the connecting assembly (8) comprises two water outlet side sliding grooves (81) arranged at the top and the bottom of the inner wall of the valve body (1), a connecting plate (82) installed between the two water outlet side sliding grooves (81) in a sliding mode, and a connecting piece (83) arranged between the connecting plate (82) and the butterfly valve assembly (9);

the connecting plate (82) comprises a water outlet side annular plate (821), a water outlet side sliding plate (824) used for being matched with the water outlet side sliding groove (81) is fixedly installed at the top and the bottom of the water outlet side annular plate (821), a horizontal fixing plate (822) is fixedly installed in the middle of one end, close to the disc plate (6), of the water outlet side annular plate (821), a T-shaped sliding groove is formed in the middle of the fixing plate (822), a T-shaped sliding block (823) is installed in the T-shaped sliding groove in a sliding mode, one end, far away from the fixing plate (822), of the T-shaped sliding block (823) is rotatably connected with the disc plate (6), and a vertical rod (826) is arranged in the middle of an inner cavity of the water outlet side annular plate (821);

the connecting piece (83) comprises a horizontal plate (831) fixedly installed in the middle of a vertical rod (826), two first fixing arms (832) are installed at one ends, far away from the vertical rod (826), of the horizontal plate (831) in a rotating mode, and a second fixing arm (833) is installed at one end, far away from the horizontal plate (831), of each first fixing arm (832) in a rotating mode.

4. A bi-directional sealing butterfly valve according to claim 3, wherein: go out water side ring board (821) and keep away from the one end outside that dish board (6) are close to dish board (6) and be equipped with C style of calligraphy sealing washer (825), and one side of C style of calligraphy sealing washer (825) is equipped with the breach that holds fixed plate (822).

5. A bi-directional sealing butterfly valve according to claim 3, wherein: butterfly valve subassembly (9) include axostylus axostyle (91) of vertical fixed mounting in valve body (1) middle part, the surface upper portion and the lower part of axostylus axostyle (91) all are equipped with stationary blade (93), and equal fixedly connected with can follow axostylus axostyle (91) as axle center pivoted butterfly valve block (92) on stationary blade (93), two the one end that butterfly valve block (92) are close to each other all is equipped with central sealing pad (95), two the one end that butterfly valve block (92) are close to coupling assembling (8) all is equipped with connecting seat (96) of using with second fixed arm (833) cooperation.

6. A bidirectional sealing butterfly valve according to claim 5, characterized in that: one end of the butterfly valve plate (92) close to the connecting component (8) is provided with two semi-annular sealing rings (94), the inner wall of the valve body (1) is provided with a sealing pair (11) matched with the semi-annular sealing rings (94) for use, and the contact surfaces of the sealing pair (11) and the semi-annular sealing rings (94) are all arranged to be inclined planes.

7. A bi-directional sealing butterfly valve according to claim 1, characterized in that: supplementary tight subassembly (3) of shutting down is including connecting inlet tube (31) of knot between valve body (1) and function case (2), and inlet tube (31) one end that is close to function case (2) extends to function case (2) inner chamber, inlet tube (31) are located the partial inner chamber in function case (2) and are equipped with piston (32) and dead lever (33) with piston (32) fixed connection, and dead lever (33) run through inlet tube (31) and extend to in function case (2), piston (32) and inlet tube (31) are located and are equipped with coil spring (34) between the one end inner wall in function case (2), the one end that inlet tube (31) were kept away from in dead lever (33) is equipped with base (35), and the top of base (35) is equipped with rack (36), valve rod (4) are located the partial surface middle part in function case (2) and are equipped with gear (37), and rack (36) and gear (37) meshing.

8. A bi-directional sealing butterfly valve according to claim 8, wherein: the elastic force provided by the spiral spring (34) is equal to the water pressure value in the valve body (1) when the butterfly valve is in an opening state.

9. A bi-directional sealing butterfly valve according to claim 1, wherein: the two sides of the valve body (1) are provided with flanges for installing the valve body (1), and the water flow direction points to the butterfly valve assembly (9) along the disc plate (6) in an installation state.