CN219570888U - Check butterfly valve capable of being cut off rapidly - Google Patents

Abstract

The utility model discloses a quick-cut check butterfly valve, which comprises a valve body, a butterfly plate and a valve rod, wherein the valve body is provided with an upper shaft hole and a lower shaft hole which are coaxial, the valve rod is rotatably arranged on the upper shaft hole and the lower shaft hole, the butterfly plate is mounted on the valve rod in a linkage manner, a valve seat is arranged in the valve body, a bracket is further arranged on the valve body, and an actuator is mounted on the bracket; the valve rod comprises a valve shaft and a driving shaft, two ends of the valve shaft are respectively arranged in an upper shaft hole and a lower shaft hole in a rotating mode, one end of the driving shaft, far away from the actuator, penetrates into the upper shaft hole, driving protrusions are integrally arranged at the position, close to the periphery, of one end of the driving shaft, close to the periphery, of the upper shaft hole, and a movable groove used for enabling the driving protrusions to circumferentially move and a stop block used for propping against the driving protrusions are integrally arranged at one end, located in the upper shaft hole, of the valve shaft. The utility model has the functions of stopping and stopping, realizes the dual-purpose effect of a valve, not only can reduce the use cost and the pipeline volume, but also can ensure the safe sealing when the pump is stopped for a long time or repaired.

Description

A Quick Cut-off Check Butterfly Valve

technical field

The utility model relates to the technical field of valves, in particular to a fast cut-off check butterfly valve.

Background technique

Check valves are usually used at the pump outlets of various pump stations in the fields of iron and steel, metallurgy, electric power, petrochemical, chemical, tap water, papermaking, pharmaceuticals, environmental protection, water supply and drainage, and municipal construction. Check valve, also known as one-way valve or check valve, is an automatic opening and closing valve that does not require manpower or other actions. It relies on the flow of the pipeline medium itself to open or close the valve. It is mainly used to prevent the medium in the pipeline from Backflow.

However, in actual use, in order to stop the pump for a long time or perform pump repairs, it is usually equipped with a stop valve and a check valve for use together, and the combination of the two can ensure a safe seal. However, the use of these two valves together is not only costly, but also increases the volume of the pipeline, which is greatly restricted by the environment.

Utility model content

The purpose of this utility model is to provide a fast cut-off check butterfly valve. The utility model has the functions of cut-off and check, and realizes the effect of one valve with two functions. Wide range, and can ensure a safe seal when the pump is shut down for a long time or the pump is repaired.

In order to achieve the above purpose, the utility model provides the following technical solutions: a fast cut-off check butterfly valve, including a valve body, a butterfly plate and a valve stem, the valve body is provided with a coaxial upper shaft hole and a lower shaft hole, The valve stem is rotatably arranged on the upper shaft hole and the lower shaft hole, the butterfly plate is mounted on the valve stem in linkage, and the valve body is provided with a valve seat for forming a sealing fit with the butterfly plate, and the valve body There is also a bracket on the bracket, and an actuator for driving the valve stem to rotate is installed on the bracket; the valve stem includes a valve shaft connected to the butterfly plate and a drive shaft connected to the output end of the actuator, and the valve shaft The two ends of the drive shaft are respectively rotated and set in the upper shaft hole and the lower shaft hole. The end of the drive shaft away from the actuator goes deep into the upper shaft hole, and the end of the drive shaft extending into the upper shaft hole is provided with a driving protrusion near the outer periphery. One end of the valve shaft located in the upper shaft hole is integrally provided with a movable groove for the circumferential movement of the driving protrusion and a stopper for abutting against the driving protrusion.

By adopting the above technical scheme, when the check function is in effect, the actuator does not work, the driving protrusion on the drive shaft is located in the movable groove of the valve shaft, and the driving protrusion on the drive shaft is separated from the stopper on the valve shaft, and the medium passes through The pressure pushes the butterfly plate to open the valve, and at the same time, under the action of the medium and the self-weight of the butterfly plate, the butterfly plate is pressed against the valve seat to close the valve; when the function is stopped, the actuator drives the drive shaft to rotate, and the drive shaft drives the drive protrusion to rotate , when the driving protrusion is in contact with the stopper on the valve shaft, the kinetic energy will be transmitted to the stopper, so that the stopper will drive the valve shaft to rotate, thereby realizing the rotation of the butterfly plate until the sealing surface of the butterfly plate and the sealing surface of the valve seat are tight , to achieve a safe seal of the valve. Therefore, the utility model has the functions of cut-off and check, and realizes the effect of one valve with two functions, which can not only reduce the cost of use, reduce the volume of the pipeline, and have a wider application range, but also ensure the safety of the pump when it is stopped for a long time or repaired. seal.

The utility model is further provided that the driving protrusion is a fan-shaped structure extending from the center of the drive shaft to the outer periphery, the stopper is a fan-shaped structure extending from the center of the valve shaft to the outer periphery, and the radian of the movable groove is larger than that of the driving protrusion. starting arc.

By adopting the above technical scheme, the clutch structure is simple and reliable, the action is stable, and the processing is very convenient.

The utility model is further provided that, when the butterfly plate is in contact with the valve seat, a reserved angle of 5° is set between one side of the driving protrusion and one side of the stopper.

By adopting the above-mentioned technical scheme, setting the reserved included angle can not only reduce the requirement of processing accuracy, facilitate processing and production, but also prevent the driving protrusion from crushing the stopper and causing local damage when the valve is closed for a long time.

The utility model is further configured that the central axis of the valve stem is set away from the central axis of the valve body, and the valve seat is set obliquely to the central axis of the valve body, so that the inner wall of the valve seat forms a conical surface, and the central axis of the valve stem Set away from the central axis of the butterfly plate.

By adopting the above technical solution, the opening torque of the valve is lower, the friction when the valve is opened and closed under high pressure is reduced, and the service life is longer.

The utility model is further provided that, the inner wall of the valve is provided with a limiting block for limiting the opening of the butterfly plate.

By adopting the above technical solution, the opening stroke of the butterfly plate can be limited, and collision with the inner wall of the valve when the butterfly plate is fully opened can be avoided, thereby causing damage to components.

The utility model is further configured that a pressure ring and a sealing ring are provided on the butterfly plate, the pressure ring is connected to the butterfly plate through a plurality of screws, the sealing ring is sandwiched between the pressure ring and the butterfly plate, and The outer circle of the sealing ring protrudes from the outer periphery of the butterfly plate to form a sealing fit with the inner peripheral surface of the valve seat.

By adopting the above technical solution, not only the sealing performance when the valve is closed can be improved, but also the detachable design of the sealing ring facilitates the replacement of the aging sealing ring during subsequent maintenance.

The utility model is further set as that, the butterfly plate is provided with a first mounting sleeve and a second mounting sleeve symmetrically arranged with the valve shaft, the first mounting sleeve is keyed to the valve shaft, and the second mounting sleeve The sleeve is linked with the valve shaft through fasteners.

By adopting the above technical scheme, the linkage between the valve shaft and the butterfly plate can be realized, and the connection structure is simple and reliable, and the production is very convenient.

The utility model is further configured to include an upper sealing assembly and a lower sealing assembly respectively arranged on the upper shaft hole and the lower shaft hole, the upper sealing assembly includes a gland, a gland, a sealing packing, The inner end of the upper shaft hole is provided with a first limit step, the gland is connected to the bracket through bolts and the pressure sleeve, sealing packing, washer and upper sleeve are pressed against the first limit. position step; the lower seal assembly includes an end cover, a support sleeve and a lower shaft sleeve sleeved on the outer periphery of the valve stem, and a second limit step is provided at the inner end of the lower shaft hole, and the end cover is installed by screws Press the support sleeve and the lower shaft sleeve on the second limit step at the position corresponding to the outer end of the valve body, and the support sleeve is also provided with a support flange for pressing against the end of the valve stem.

By adopting the above technical solution, not only the sealing performance between the valve stem and the valve body can be improved, but also the frictional force is small, which reduces the opening and closing torque of the valve.

The utility model is further configured to include an upper dustproof cover and a lower dustproof cover set on the outer periphery of the valve stem, the upper dustproof cover is sandwiched between the upper shaft sleeve and the first installation sleeve, and the lower dustproof cover The dust jacket is sandwiched between the lower shaft sleeve and the second installation sleeve.

By adopting the above technical solution, the sealing performance between the valve stem and the valve body can be further improved, so that it can work stably in harsh environments.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is the schematic cross-sectional view of K-K full close in Fig. 1;

Fig. 3 is a schematic cross-sectional view of fully open K-K in Fig. 1;

Fig. 4 is a schematic structural view of the sealing assembly of the utility model;

Fig. 5 is a structural schematic diagram of the lower sealing assembly of the present invention;

Fig. 6 is a schematic diagram of the state when the utility model is fully closed as a whole;

Fig. 7 is a schematic view of the state when the utility model is fully opened as a whole.

In the figure: 1. Valve body; 2. Butterfly plate; 3. Valve stem; 4. Upper shaft hole; 5. Lower shaft hole; 6. Valve seat; 7. Bracket; 8. Actuator; 9. Valve shaft; 10 , driving shaft; 11, driving protrusion; 12, movable groove; 13, stopper; 14, reserved angle; 15, limit block; 16, pressure ring; 17, sealing ring; 18, first installation sleeve; 19. Second installation sleeve; 20. Upper sealing assembly; 21. Lower sealing assembly; 22. Gland; 23. Compression sleeve; 24. Sealing packing; 25. Gasket; 26. Upper shaft sleeve; 27. First limit Step; 28, end cover; 29, support sleeve; 30, lower shaft sleeve; 31, second limit step; 32, support flange; 33, upper dust cover; 34, lower dust cover.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Embodiment: A quick cut-off check butterfly valve as shown in accompanying drawings 1 to 7, comprising a valve body 1, a butterfly plate 2 and a valve stem 3, the valve body 1 is provided with a coaxial upper shaft hole 4 and The lower shaft hole 5, the valve stem 3 is rotatably arranged on the upper shaft hole 4 and the lower shaft hole 5, the butterfly plate 2 is mounted on the valve stem 3 in linkage, and the valve body 1 is provided with a The plate 2 constitutes the valve seat 6 with sealing fit, the valve seat 6 is integrated with the valve body 1, and the valve body 1 is also provided with a bracket 7, which is directly installed on the valve body 1 by bolts, and the bracket 7 is installed There is an actuator 8 for driving the valve stem 3 to rotate, and the actuator 8 is a motor or an air cylinder or a hydraulic cylinder; the valve stem 3 includes a valve shaft 9 connected to the butterfly plate 2 and a drive connected to the output end of the actuator 8 Shaft 10, the two ends of the valve shaft 9 are respectively rotated and arranged in the upper shaft hole 4 and the lower shaft hole 5, the end of the drive shaft 10 away from the actuator 8 goes deep into the upper shaft hole 4, and the drive shaft 10 extends into One end of the upper shaft hole 4 is integrally provided with a driving protrusion 11 near the outer periphery, and one end of the valve shaft 9 located in the upper shaft hole 4 is integrally provided with a movable groove 12 for the circumferential movement of the driving protrusion 11 and for connecting with the driving protrusion 11. The stopper 13 against which the driving projection 11 abuts, that is, the movable groove 12 and the stopper 13 form a complete circle. When the check function is used, the actuator 8 does not work, the driving protrusion 11 on the drive shaft 10 is located in the movable groove 12 of the valve shaft 9, and the driving protrusion 11 on the drive shaft 10 is separated from the stopper 13 on the valve shaft 9 , the valve is opened by pushing the butterfly plate 2 through the pressure of the medium, and at the same time, the butterfly plate 2 is pressed against the valve seat 6 under the action of the medium and the self-weight of the butterfly plate 2 to close the valve; when the function is stopped, the actuator 8 drives the drive shaft 10 Rotate, the drive shaft 10 drives the drive protrusion 11 to rotate, and when the drive protrusion 11 is in contact with the stopper 13 on the valve shaft 9, the kinetic energy is transmitted to the stopper 13, so that the stopper 13 drives the valve shaft 9 to rotate, thereby realizing the butterfly plate 2 until the sealing surface of the butterfly plate 2 is pressed against the sealing surface of the valve seat 6 to realize the safety sealing of the valve. Therefore, the utility model has the functions of cut-off and check, and realizes the effect of one valve with two functions, which can not only reduce the cost of use, reduce the volume of the pipeline, and have a wider application range, but also ensure the safety of the pump when it is stopped for a long time or repaired. seal.

As shown in accompanying drawings 2 and 3, the driving protrusion 11 is a fan-shaped structure extending from the center of the drive shaft 10 to the outer periphery, and the stopper 13 is a fan-shaped structure extending from the center of the valve shaft 9 to the outer periphery, and the The radian of the movable groove 12 is larger than that of the driving protrusion 11 , and in this embodiment, the structure of the driving protrusion 11 is the same as that of the stopper 13 . The clutch structure is simple and reliable, the action is stable, and the processing is very convenient.

As shown in Figure 2, when the butterfly plate 2 is in contact with the valve seat 6, there is a reserved space with an angle of 5° between one side of the driving protrusion 11 and one side of the stopper 13. Angle 14. Setting the reserved included angle 14 can not only reduce the processing accuracy requirements, facilitate processing and production, but also prevent the driving protrusion 11 from crushing the stopper 13 when the valve is closed for a long time, causing local damage. It is worth mentioning that the reserved angle 14 may not be set.

As shown in Figure 6, the central axis of the valve stem 3 is set away from the central axis of the valve body 1, and the valve seat 6 is arranged obliquely to the central axis of the valve body 1, so that the inner wall of the valve seat 6 forms a conical surface, and the The central axis of the valve stem 3 deviates from the central axis of the butterfly plate 2. This design makes the opening torque of the valve lower, reduces the friction when the valve is opened and closed under high pressure, and has a longer service life.

As shown in FIG. 7 , the inner wall of the valve body 1 is provided with a limiting block 15 for limiting the opening of the butterfly plate 2 , and the limiting block 15 is welded on the inner wall of the valve body 1 . The limit block 15 can limit the opening stroke of the butterfly plate 2 and prevent the butterfly plate 2 from colliding with the inner wall of the valve body 1 when the butterfly plate 2 is fully opened, thereby causing damage to parts.

As shown in Figure 6, the butterfly plate 2 is provided with a pressure ring 16 and a sealing ring 17, the pressure ring 16 is connected to the butterfly plate 2 through a plurality of screws, and the sealing ring 17 is clamped on the pressure ring 16 Between the butterfly plate 2 and the outer circle of the sealing ring 17 protrudes from the outer periphery of the butterfly plate 2 to form a sealing fit with the inner peripheral surface of the valve seat 6 . This design can not only improve the sealing performance when the valve is closed, but also the detachable design of the sealing ring 17 facilitates replacement of the aging sealing ring 17 during subsequent maintenance.

As shown in Figure 1, the butterfly plate 2 is provided with a first mounting sleeve 18 and a second mounting sleeve 19 that are symmetrically arranged to match the valve shaft 9, and the first mounting sleeve 18 is keyed to the valve shaft 9 , the second installation sleeve 19 is linked with the valve shaft 9 through fasteners (pins), wherein the first installation sleeve 18 and the second installation sleeve 19 are welded on the butterfly plate 2, or integrated with the butterfly plate 2 Structure, the first mounting sleeve 18 and the second mounting sleeve 19 are triangular in cross-section, and both have a round hole in the middle for the valve shaft 9 to pass through. This design can realize the linkage between the valve shaft 9 and the butterfly plate 2, and the connection structure is simple and reliable, and the production is very convenient.

As shown in accompanying drawings 1, 4, and 5, it also includes an upper seal assembly 20 and a lower seal assembly 21 respectively arranged on the upper shaft hole 4 and the lower shaft hole 5, and the upper seal assembly 20 includes a Gland 22, gland 23, sealing packing 24, gasket 25 and upper shaft sleeve 26, the inner end of the upper shaft hole 4 is provided with a first limit step 27, and the gland 22 is connected to the bracket 7 through bolts And compress the pressure sleeve 23, sealing packing 24, gasket 25 and upper shaft sleeve 26 on the first limiting step 27; the lower sealing assembly 21 includes an end cover 28 and a support sleeve 29 sleeved on the outer periphery of the valve stem 3 , the lower shaft sleeve 30, the inner end of the lower shaft hole 5 is provided with a second limit step 31, the end cover 28 is installed on the position of the corresponding outer end of the valve body 1 by screws and the supporting sleeve 29 and the lower shaft sleeve 30 is compressed on the second limit step 31 , and the support sleeve 29 is also provided with a support flange 32 for pressing against the end of the valve stem 3 . This design can not only improve the sealing performance between the valve stem 3 and the valve body 1, but also has small friction force, which reduces the opening and closing torque of the valve.

As shown in accompanying drawing 4 and accompanying drawing 5, also comprise the upper dustproof cover 33 and the lower dustproof cover 34 that are sleeved on the outer periphery of valve stem 3, described upper dustproof cover 33 is sandwiched between upper shaft sleeve 26 and the first Between the installation sleeves 18, the lower dust-proof sleeve 34 is sandwiched between the lower shaft sleeve 30 and the second installation sleeve 19, and the outer ends of the two dust-proof sleeves have the same limit steps that are pressed against the corresponding shaft holes. The limiting convex edge of the dust cover is used to prevent the entire sliding of the dust cover into the inner cavity of the valve body 1. This design can further improve the sealing performance between the valve stem 3 and the valve body 1, so that it can work stably in harsh environments.

Claims (9)

1. A fast-cut check butterfly valve, comprising a valve body (1), a butterfly plate (2) and a valve stem (3), the valve body (1) is provided with a coaxial upper shaft hole (4) and The lower shaft hole (5), the valve stem (3) is rotatably arranged on the upper shaft hole (4) and the lower shaft hole (5), and the butterfly plate (2) is mounted on the valve stem (3) in linkage, so The valve body (1) is provided with a valve seat (6) for forming a sealing fit with the butterfly plate (2), the valve body (1) is also provided with a bracket (7), and the bracket (7) An actuator (8) for driving the valve stem (3) to rotate is installed on it; the feature is that: the valve stem (3) includes a valve shaft (9) connected with the butterfly plate (2) and a valve shaft (9) connected with the actuator (8) ) connected to the output end of the drive shaft (10), the two ends of the valve shaft (9) are respectively rotated in the upper shaft hole (4) and the lower shaft hole (5), and the drive shaft (10) is far away from the execution One end of the device (8) goes deep into the upper shaft hole (4), and one end of the drive shaft (10) protrudes into the upper shaft hole (4) and is integrally provided with a driving protrusion (11) near the outer periphery, and the valve shaft (9 ) is located at one end of the upper shaft hole (4) and is integrally provided with an active groove (12) for circumferentially moving the driving protrusion (11) and a stopper (13) for abutting against the driving protrusion (11). 2. A quick cut-off check butterfly valve according to claim 1, characterized in that: the drive protrusion (11) is a fan-shaped structure extending from the center of the drive shaft (10) to the outer periphery, and the stopper ( 13) is a fan-shaped structure extending from the center of the valve shaft (9) to the outer periphery, and the arc of the movable groove (12) is larger than the arc of the driving protrusion (11). 3. A fast shut-off check butterfly valve according to claim 1 or 2, characterized in that: when the butterfly plate (2) abuts against the valve seat (6), one of the driving protrusions (11) A reserved angle (14) of 5° is set between the side and one side of the block (13). 4. A fast shut-off check butterfly valve according to claim 1, characterized in that: the central axis of the valve stem (3) is set away from the central axis of the valve body (1), and the valve seat (6) is inclined to The central axis of the valve body (1) is set so that the inner wall of the valve seat (6) forms a conical surface, and the central axis of the valve stem (3) is set away from the central axis of the butterfly plate (2). 5. A fast shut-off check butterfly valve according to claim 4, characterized in that: the inner wall of the valve body (1) is provided with a limit block for limiting the opening of the butterfly plate (2) (15). 6. A fast shut-off check butterfly valve according to claim 4, characterized in that: said butterfly plate (2) is provided with a pressure ring (16) and a sealing ring (17), said pressure ring (16 ) is connected to the butterfly plate (2) through a plurality of screws, the sealing ring (17) is sandwiched between the pressure ring (16) and the butterfly plate (2), and the outer circle of the sealing ring (17) protrudes Out of the outer periphery of the butterfly plate (2) to form a sealing fit with the inner peripheral surface of the valve seat (6). 7. A fast shut-off check butterfly valve according to claim 1, characterized in that: the butterfly plate (2) is provided with a first mounting sleeve (18) symmetrically arranged to match the valve shaft (9). ) and the second installation sleeve (19), the first installation sleeve (18) is keyed to the valve shaft (9), and the second installation sleeve (19) is linked to the valve shaft (9) through fasteners. 8. A fast shut-off check butterfly valve according to claim 1, characterized in that it further comprises an upper sealing assembly (20) and a lower sealing assembly (20) respectively arranged on the upper shaft hole (4) and the lower shaft hole (5). A sealing assembly (21), the upper sealing assembly (20) includes a gland (22), a gland (23), a sealing packing (24), a gasket (25) and an upper shaft sleeve sleeved on the outer periphery of the valve stem (3) (26), the inner end of the upper shaft hole (4) is provided with a first limit step (27), the gland (22) is connected to the bracket (7) by bolts and the pressure sleeve (23), seal Packing (24), washer (25) and upper shaft sleeve (26) are compressed on the first limit step (27); the lower sealing assembly (21) includes an end cover (28) and sleeved on the valve stem ( 3) The support sleeve (29) and the lower shaft sleeve (30) on the outer periphery, the inner end of the lower shaft hole (5) is provided with a second limit step (31), and the end cover (28) is installed on the The valve body (1) corresponds to the position of the outer end and presses the support sleeve (29) and the lower shaft sleeve (30) on the second limit step (31), and the support sleeve (29) is also provided with a Tighten the support flange (32) at the end of the stem (3). 9. A fast shut-off check butterfly valve according to claim 8, characterized in that: it also includes an upper dust jacket (33) and a lower dust jacket (34) sleeved on the outer periphery of the valve stem (3), The upper dustproof cover (33) is sandwiched between the upper shaft sleeve (26) and the first installation sleeve (18), and the lower dustproof cover (34) is sandwiched between the lower shaft sleeve (30) and the second installation sleeve. between sets of (19).