CN208331265U - A kind of butterfly valve - Google Patents

Abstract

The utility model discloses a kind of butterfly valves, including valve body, valve plate, valve seat and power device, valve seat is fixed on the downstream of cavity, main pulling plate is fixed on valve body, valve shaft is rotatably equipped on main pulling plate, in closed state the valve shaft be located at the top of valve body horizontal center line, connecting support is provided on valve plate, long crank is fixed on valve shaft, connecting shaft is fixed in connecting support, the lower end of long crank is rotatablely installed in connecting shaft, connecting plate is fixed in connecting shaft, short crank is also hinged between main pulling plate and connecting plate, the upper end of short crank is hinged on main pulling plate by the first hinged shaft, the lower end of short crank is hinged on connecting plate by the second hinged shaft, second hinged shaft is located at the upstream side of connecting shaft, connecting shaft is located at the downstream side of long crank-swinging lower dead center, second hinged shaft is located at the downstream side of short crank-swinging lower dead center.When the butterfly valve can open and close the reliability of butterfly valve is not improved, is prolonged the service life with the prooving of valve seat.

Description

A kind of butterfly valve

Technical field

The utility model relates to a kind of butterfly valves, belong to valve technology field.

Background technique

Butterfly valve is called flap valve, is a kind of simple regulating valve of structure, can be used for the switch control of low pressure pipeline medium Butterfly valve refers to that closure member (flap or turnover panel) is disk, and a kind of valve of open and close is reached around valve shaft rotation.And it is current Butterfly valve the problem is that close or open-type valve plate and valve seat between can generate abrasion, in this way long-time service after abrasion meeting Build up the case where causing valve to be not closed completely.

Utility model content

The technical problem to be solved by the utility model is to provide a kind of butterfly valves, when which can open and close not With the prooving of valve seat, the reliability of butterfly valve is improved, is prolonged the service life.

In order to solve the above technical problems, the technical solution of the utility model is: a kind of butterfly valve, including valve body, valve plate, valve seat And power device, circular cavity is provided on the valve body, the valve seat is annular and the downstream for being fixed on cavity, institute It states valve plate and is set to the upstream side in cavity and being located at valve seat, be fixed with main pulling plate on the valve body, which is located at valve body Vertical centerline on and be located at the upstream side of valve plate, be rotatably equipped with valve shaft on the main pulling plate, the left and right ends of the valve shaft Be rotatablely installed on valve body and with valve seal cooperate, in closed state the valve shaft be located at the upper of valve body horizontal center line Side, the upstream side of the valve plate are provided with connecting support, are located at left and right sides of main pulling plate on the valve shaft and are respectively fixed with Long crank is fixed with connecting shaft in the connecting support, and the connecting shaft is located at valve body horizontal center line in closed state The lower end of lower section, the long crank is rotatablely installed in connecting shaft, and the connecting plate vertical with valve plate is fixed in the connecting shaft, The connecting plate is located between two long cranks, and the short crank with the dislocation of long crank, institute are also hinged between main pulling plate and connecting plate The upper end for stating short crank is hinged on main pulling plate by the first hinged shaft, and the lower end of the short crank is hinged on company by the second hinged shaft On fishplate bar, first hinged shaft is located at the upstream side of valve shaft and closer to valve body horizontal center line, and the second hinged shaft is located at connecting shaft Upstream side, connecting shaft is located at the downstream side of long crank-swinging lower dead center in closed state, in closed state the second hinged shaft Positioned at the downstream side of short crank-swinging lower dead center, the power device of driving valve shaft rotation is fixed on the valve body.

As a preferred solution, it is also equipped with auxiliary pulling plate on the valve body, one end of the auxiliary pulling plate is fixed on The upper end of cavity, the other end are mounted on main pulling plate.

As a preferred solution, the upstream side of the valve plate is provided with reinforcing rib.

As a preferred solution, in closed state, the line of centres and the first hinged shaft of the valve shaft and connecting shaft It is parallel with the line of centres of the second hinged shaft.

As a preferred solution, the valve plate includes plate body, and the quantity of the connecting support is for two and bent with length Handle meaning is corresponding, and the periphery of the plate body is welded with cyclization, should cooperate with cyclization and valve seat.

As a preferred solution, the valve body includes the ontology of tubular, and the upstream side of ontology and lower right side are all provided with It is equipped with connecting flange, the fixing seat for fixing main pulling plate is provided on the ontology, is respectively arranged at left and right sides of ontology Filler mounting cylinder is provided with the bearing block being arranged concentrically with filler mounting cylinder on the connecting flange, and the both ends of the valve shaft are passed through Filler mounting cylinder and bearing block are worn, airtight and watertight padding is installed in filler mounting cylinder, is fixed on bearing block and facilitates valve shaft rotation Bearing is mounted with the power device on one of bearing block, the end transmission connection of the power device and valve shaft.

As a preferred solution, the protruding ring with valve plate cooperation is provided in the upstream side of the valve seat.

After above-mentioned technical proposal, the effect of the utility model is: since the valve plate is set in cavity and position In being fixed with main pulling plate on the upstream side of valve seat, the valve body, which is located in the vertical centerline of valve body and is located at valve The upstream side of plate is rotatably equipped with valve shaft on the main pulling plate, and the left and right ends rotational installation of the valve shaft is on valve body and and valve Body sealing cooperation, in closed state the valve shaft be located at the top of valve body horizontal center line, the upstream side of the valve plate is set It is equipped with connecting support, is located at left and right sides of main pulling plate on the valve shaft and is respectively fixed with long crank, it is solid in the connecting support Surely there is connecting shaft, the connecting shaft is located at the lower section of valve body horizontal center line in closed state, and the lower end of the long crank turns It is dynamic to be installed in connecting shaft, the connecting plate vertical with valve plate is fixed in the connecting shaft, which is located at two long cranks Between, the short crank with the dislocation of long crank is also hinged between main pulling plate and connecting plate, the upper end of the short crank passes through first Hinged shaft is hinged on main pulling plate, and the lower end of the short crank is hinged on connecting plate by the second hinged shaft, first hinged shaft position In valve shaft upstream side and closer to valve body horizontal center line, the second hinged shaft is located at the upstream side of connecting shaft, in closed state Connecting shaft is located at the downstream side of long crank-swinging lower dead center, and the second hinged shaft is located at short crank-swinging lower dead center in closed state Downstream side is fixed with the power device of driving valve shaft rotation on the valve body.For the butterfly valve when opening, power device drives valve shaft Rotation, valve shaft rotate when just by long crank handle turns connecting shaft rotate, and due under closed state connecting shaft be in lower dead center Downstream side, therefore, when long crank-swinging can first pass through lower dead center, in this way, long crank just will drive valve plate decline and principle valve seat Direction it is mobile, be thus detached from valve seat, then valve shaft continues to be driven to rotate, since the length of long crank is long, short crank Length it is short, and the second hinged shaft is located at the upstream side of connecting shaft, and therefore, the swing angle of long crank can be less than the pendulum of short crank Dynamic angle opens valve plate gradually, thus complete in this way, rotating valve plate itself also around connecting shaft while rotation further around valve shaft At the opening operation of valve plate.Similarly, it is the negative actuation of breakdown action when closed state, is resetted in display valve plate overturning, will When close to valve seat, connecting shaft generates one and vacillates downwards around just not only one upward displacement of generation after bottom dead center Dynamic is unique, in this way, valve plate just and downward downstream integrally upward according to above-mentioned resultant displacement move closer to valve seat and finally with Valve base sealing, and when valve plate and valve base sealing, long crank has bypassed lower dead center, and long crank will generate one downstream to valve plate The component in direction, and then valve seat is compressed, which will not wear between valve plate and valve seat when opening and closing, because This, the reliability of butterfly valve is higher, and the service life is longer.

Again due to being also equipped with auxiliary pulling plate on the valve body, one end of the auxiliary pulling plate is fixed on the upper end of cavity, separately One end is mounted on main pulling plate, and the main pulling plate of drawing which can assist pulls valve shaft with main pulling plate jointly, avoids valve Shaft distortion, it is ensured that valve plate reliably rotates.

Again since the upstream side of the valve plate is provided with reinforcing rib, which can be improved the intensity of valve plate.

Again since the valve plate includes plate body, and the quantity of the connecting support is for two and corresponding with long crank meaning, should The periphery of plate body is welded with cyclization, should be cooperated with cyclization and valve seat, the structure of this turnover panel can be more convenient to process, ontology Size is small and precision prescribed is low, and can individually process with cyclization, and difficulty of processing is low.

Again due to being provided with the protruding ring with valve plate cooperation in the upstream side of the valve seat, the protruding ring is structurally reasonable, Small with contact area when the cooperation of turnover panel, sealing effect is more preferable.

Detailed description of the invention

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

Fig. 1 is the structure sectional view of the valve body of the utility model embodiment；

Fig. 2 is the left-hand partial sectional view of Fig. 1；

Fig. 3 is the cross-sectional view of valve plate closed state；

Fig. 4 is status diagram when valve plate is just lifted off a seat；

Fig. 5 is the status diagram after valve plate turns an angle；

Fig. 6 is the status diagram after valve plate turns an angle；

Fig. 7 is status diagram when valve plate fully opens；

In attached drawing: 1. valve bodies；101. ontology；102. connecting flange；2. valve seat；201. protruding ring；3. attachment base；4. filler Mounting cylinder；5. bearing block；6. valve shaft center line；7. valve body horizontal center line；8. main pulling plate；9. valve plate；901. plate body；902. matching Cyclization；10. assisting pulling plate；11. reinforcing rib；12. valve shaft；13. connecting shaft；14. the first hinged shaft；15. the second hinged shaft；16. long bent Handle；17. short crank；18. connecting support；19. connecting plate.

Specific embodiment

The utility model is described in further detail below by specific embodiment.

As shown in Figures 1 to 7, a kind of butterfly valve, including valve body 1, valve plate 9, valve seat 2 and power device, on the valve body 1 It is provided with circular cavity, the valve seat 2 is annular and the downstream for being fixed on cavity, is set in the upstream side of the valve seat 2 It is equipped with the protruding ring 201 cooperated with valve plate 9.The protruding ring 201 can reduce the contact surface with valve plate 9, improve sealing effect, drop Low difficulty of processing.

The valve plate 9 is set to the upstream side in cavity and being located at valve seat 2, and it is in Fig. 3 that upstream side is mentioned in the present embodiment Drawing on the left of, downstream side be Fig. 3 state under drawing on the right side of.And what is mentioned in the present embodiment is with shape in Fig. 1 up and down It is determined under state.

Main pulling plate 8 is fixed on the valve body 1, the fixed form of the main pulling plate 8 is to fix a company in the top of valve body 1 The upper end of joint chair 3, main pulling plate 8 is fixed on attachment base 3.The main pulling plate 8 is located in the vertical centerline of valve body 1 and is located at valve plate 9 upstream side,

Be rotatably equipped with valve shaft 12 on the main pulling plate 8, the rotational installation of the left and right ends of the valve shaft 12 on valve body 1 and with The sealing of valve body 1 cooperates, and in the present embodiment, the valve body 1 includes the ontology 101 of tubular, the upstream side of ontology 101 and lower right side It is provided with connecting flange 102, the fixing seat for fixing main pulling plate 8, the left and right of ontology 101 are provided on the ontology 101 Two sides are respectively arranged with filler mounting cylinder 4, are provided with the bearing being arranged concentrically with filler mounting cylinder 4 on the connecting flange 102 Seat 5, the both ends of the valve shaft 12 run through filler mounting cylinder 4 and bearing block 5, are equipped with airtight and watertight padding, bearing in filler mounting cylinder 4 It is fixed with the bearing for facilitating valve shaft 12 to rotate on seat 5, is mounted with the power device on one of bearing block 5, power dress It sets and is sequentially connected with the end of valve shaft 12.The power device can be pneumatic or motor or hydraulic power, above-mentioned three A power is traditional rotary power in valve industry and machinery industry, such as can pneumatically use rotary cylinder, hydraulic Power can be using revolution hydraulic power unit, these power are all to choose on the market.

As shown in figure 3, in closed state the valve shaft center line 6 of the valve shaft 12 be located at the upper of 1 horizontal center line of valve body Side, the upstream side of the valve plate 9 are provided with connecting support 18, and the left and right sides that main pulling plate 8 is located on the valve shaft 12 is distinguished It is fixed with long crank 16, the quantity of long crank 16, which is two, can preferably drive valve plate 9 to act, solid in the connecting support 18 Surely there is connecting shaft 13, the connecting shaft 13 is located at the lower section of valve body horizontal center line 7 in closed state, the long crank 16 Lower end is rotatablely installed in connecting shaft 13, the connecting plate 19 vertical with valve plate 9 is fixed in the connecting shaft 13, the connecting plate 19 Between two long crank 16, the short crank 17 with the dislocation of long crank 16 is also hinged between main pulling plate 8 and connecting plate 19, it is short The quantity of crank 17 is a pair, and the upper end of the short crank 17 is hinged on main pulling plate 8 by the first hinged shaft 14, two short cranks 17 are located at the two sides of main pulling plate 8, and the lower end of the short crank 17 is hinged on connecting plate 19 by the second hinged shaft 5, and described first Hinged shaft 14 is located at the upstream side of valve shaft 12 and closer to valve body horizontal center line 7, and the second hinged shaft 5 is located at the upstream of connecting shaft 13 Side, connecting shaft 13 is located at the downstream side (i.e. the left side of drawing) that long crank 16 swings lower dead center in closed state, in closed form The second hinged shaft 5 is located at the downstream side that short crank 17 swings lower dead center under state, is fixed with what driving valve shaft 12 rotated on the valve body 1 Power device.

As shown in Fig. 3 to Fig. 7, auxiliary pulling plate 10 is also equipped on the valve body 1, one end of the auxiliary pulling plate 10 is fixed on The upper end of cavity, the other end are mounted on main pulling plate 8, which can be with auxiliary pulling valve shaft 12, by assisting pulling plate 10 and main pulling plate 8 jointly cooperation drawing valve shaft 12, make valve shaft 12 movement as far as possible reduce deformation, guarantee rotational action it is smooth.

As shown in figure 3, the valve plate 9 includes plate body 901, the quantity of the connecting support 18 be two and with long crank 16 Meaning is corresponding, and the periphery of the plate body 901 is welded with cyclization 902, should cooperate with cyclization 902 and valve seat 2.The valve plate 9 it is upper Trip side is provided with reinforcing rib 11.The reinforcing rib 11 is fixed on plate body 901,

In closed state, the line of centres and the first hinged shaft 14 and the second hinged shaft 5 of the valve shaft 12 and connecting shaft 13 The line of centres is parallel.

The working principle of the utility model is: as shown in figure 3, the sealing cooperation of the protruding ring 201 of valve plate 9 and valve seat 2, makes butterfly Valve is closed；

As shown in figure 4, power device drives valve shaft 12 to rotate, make the long rotation counterclockwise of crank 16, what is rotated counterclockwise In the process, the lower dead center that long crank 16 can gradually rotate thus drives connecting shaft 13 to generate one downwards and to the right (upstream Side) componental movement, thus separate valve plate 9 and valve seat 2 and there is certain spacing.

Rotate long crank 16 as shown in figure 5, valve shaft 12 continues to rotate, due in the rotation of long crank 16 and short crank 17 The heart is different and length is different, and long crank 16 rotates an angle [alpha], and the angle that short crank 17 rotates is necessarily greater than α in this way, valve plate 9 It just not only rotates around valve shaft 12, while also being rotated around connecting shaft 13, and since valve plate 9 has first moved right a certain distance, make Have certain spacing between valve plate 9 and valve seat 2, when valve plate 9 is rotated around valve shaft 12, turnover panel at a distance from valve seat 2 increasingly Far, and this distance keeps valve plate 9 much smoother by valve seat 2, shown in Fig. 3, valve plate 9 it is original be sized larger than valve seat 2 inner hole, but since turnover panel and valve seat 2 have a certain distance, then only having part to pass through in valve seat 2 when valve plate 9 rotates Hole, as long as then the chord length at the position that valve plate 9 passes through is less than hole size.

As shown in Figure 6 and Figure 7, valve shaft 12, which continues rotation, gradually increases the opening angle of turnover panel, the plate face of final valve plate 9 In level, to fully open.

Valve plate 9 is closed with the movement of unlatching completely on the contrary, this is not described in detail again.

Embodiment described above is only the description to the preferred embodiment of the present invention, not as the limit to the scope of the invention It is fixed, on the basis of not departing from design spirit of the present invention, to various modifications and transformation that technical solution of the present invention is made, it should all fall Enter in the protection scope that claims of the present invention determines.

Claims (7)

1. a kind of butterfly valve, including valve body, valve plate, valve seat and power device, it is characterised in that: be provided with circle on the valve body Cavity, the valve seat is annular and is fixed on the downstream of cavity, and the valve plate is set in cavity and is located at the upper of valve seat Side is swum, is fixed with main pulling plate on the valve body, which is located at the upstream side in the vertical centerline of valve body and being located at valve plate, It is rotatably equipped with valve shaft on the main pulling plate, the left and right ends rotational installation of the valve shaft cooperates on valve body and with valve seal, In closed state the valve shaft be located at the top of valve body horizontal center line, the upstream side of the valve plate is provided with connection branch , it is located at left and right sides of main pulling plate on the valve shaft and is respectively fixed with long crank, is fixed with connecting shaft in the connecting support, The connecting shaft is located at the lower section of valve body horizontal center line in closed state, and the lower end of the long crank is rotatablely installed in connection On axis, the connecting plate vertical with valve plate is fixed in the connecting shaft, which is located between two long cranks, main pulling plate and The short crank with the dislocation of long crank is also hinged between connecting plate, the upper end of the short crank is hinged on main drawing by the first hinged shaft On plate, the lower end of the short crank is hinged on connecting plate by the second hinged shaft, and first hinged shaft is located at the upstream side of valve shaft And closer to valve body horizontal center line, the second hinged shaft is located at the upstream side of connecting shaft, and connecting shaft is located at long bent in closed state Handle swings the downstream side of lower dead center, and the second hinged shaft is located at the downstream side of short crank-swinging lower dead center, the valve in closed state The power device of driving valve shaft rotation is fixed on body.

2. a kind of butterfly valve as described in claim 1, it is characterised in that: be also equipped with auxiliary pulling plate on the valve body, the auxiliary One end of pulling plate is fixed on the upper end of cavity, and the other end is mounted on main pulling plate.

3. a kind of butterfly valve as claimed in claim 2, it is characterised in that: the upstream side of the valve plate is provided with reinforcing rib.

4. a kind of butterfly valve as claimed in claim 3, it is characterised in that: in closed state, in the valve shaft and connecting shaft Heart line is parallel with the line of centres of the first hinged shaft and the second hinged shaft.

5. a kind of butterfly valve as claimed in claim 4, it is characterised in that: the valve plate includes plate body, the number of the connecting support Amount is for two and corresponding with long crank meaning, and the periphery of the plate body is welded with cyclization, should cooperate with cyclization and valve seat.

6. a kind of butterfly valve as claimed in claim 5, it is characterised in that: the valve body includes the ontology of tubular, the upstream of ontology Side and lower right side are provided with connecting flange, and the fixing seat for fixing main pulling plate, the left and right of ontology are provided on the ontology Two sides are respectively arranged with filler mounting cylinder, and the bearing block being arranged concentrically with filler mounting cylinder, institute are provided on the connecting flange The both ends for stating valve shaft are equipped with airtight and watertight padding in filler mounting cylinder and bearing block, filler mounting cylinder, are fixed on bearing block Facilitate the bearing of valve shaft rotation, is mounted with the power device on one of bearing block, the end of the power device and valve shaft Transmission connection.

7. a kind of butterfly valve as claimed in claim 6, it is characterised in that: be provided in the upstream side of the valve seat and match with valve plate The protruding ring of conjunction.