Butterfly valve

Abstract

The utility model provides a butterfly valve, which relates to the technical field of butterfly valve structures and comprises a first valve seat, a second valve seat, a sealing component, a fastening component and an adjusting component. The adjusting assembly is connected with the first valve seat and the second valve seat at the same time and used for adjusting the gap between the first valve seat and the second valve seat in the axial direction. According to the butterfly valve, the sealing performance can be adjusted through the adjusting assembly, so that under the condition that the sealing performance of the butterfly valve in a dry powder environment is guaranteed, it is guaranteed that opening and closing are flexible and reliable, resistance in the opening and closing process of the butterfly valve is reduced, and it is guaranteed that the sealing performance of the butterfly valve and the service life of the butterfly valve can be guaranteed after multiple times of opening and closing.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valve structures, and in particular to a butterfly valve. Background Art

[0002] A spray dryer, also known as a spray drying machine, is a new type of high-efficiency drying process equipment. It can turn materials such as solutions, emulsions, suspensions, and pastes into powders, fine and medium-grained products through spray drying.

[0003] In existing production, most use centrifugal spray dryers. After air passes through filters and heating devices, it enters the hot air distributor at the top of the drying chamber. The hot air passing through the hot air distributor enters the drying chamber evenly in a spiral shape. At the same time, the feed liquid is sent to the centrifugal spray head installed at the top by a pump. The feed liquid is sprayed into extremely small mist-like droplets, greatly increasing the specific surface area of contact between the feed liquid and the hot air. The small droplets and the hot air flow downward in parallel, and the water is quickly evaporated and dried into granular products in a very short time, and is collected at the bottom of the tower and in the cyclone separator. The waste gas is discharged to the outside. The dried finished product is collected. In the pollinator discharge pipe at the lower part of the tower body and the lower part of the cyclone separator, it should be replaced before the pollinator discharge pipe is filled. When replacing the pollinator discharge pipe, the butterfly valve above must be closed first before proceeding.

[0004] After research by the inventor, it is found that there is a pneumatic butterfly valve at both the upper and lower parts of the discharge pipe connected to some existing dryers. One of the two valves is always in a closed state to keep the cyclone separator always in a sealed state. However, during the long-term discharging process, the two valves are frequently opened and closed for a long time, which easily affects the sealing performance of the butterfly valve and the service life of the butterfly valve. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a butterfly valve that can improve the sealing performance and service life of the installed butterfly valve.

[0006] In a first aspect, the utility model provides a butterfly valve, comprising:

[0007] A first valve seat;

[0008] A second valve seat, the first valve seat and the second valve seat are sequentially connected axially, and an installation space is defined between the first valve seat and the second valve seat;

[0009] A sealing assembly, the sealing assembly is installed in the installation space, the sealing assembly includes a butterfly valve core and a sealing ring, both end faces of the sealing ring are in contact with the first valve seat and the second valve seat respectively, and the outer peripheral surface of the butterfly valve core is in contact with the inner peripheral surface of the sealing ring;

[0010] A fastening assembly, the first valve seat and the second valve seat are tightly connected through the fastening assembly;

[0011] Adjusting assembly, which is connected to the first valve seat and the second valve seat simultaneously and is used to adjust the axial clearance between the first valve seat and the second valve seat.

[0012] In an alternative embodiment, the first valve seat is provided with a plurality of adjusting screw holes, the axial direction of the adjusting screw holes is parallel to the axial direction of the first valve seat, the adjusting assembly includes a plurality of adjusting screws, and the plurality of adjusting screws are respectively installed in the adjusting screw holes in a one-to-one correspondence, and the end of the adjusting screw away from its head abuts against the end face of the second valve seat.

[0013] In an alternative embodiment, the plurality of adjusting screw holes are arranged at equal intervals, and the axes of the plurality of adjusting screw holes all pass through a preset path, the preset path is circular and its axis is coaxial with the axes of the first valve seat and the second valve seat.

[0014] In an alternative embodiment, the number of the plurality of adjusting screw holes and the adjusting screws is four.

[0015] In an alternative embodiment, the adjusting assembly further includes a plurality of locking nuts, the adjusting screws are threadedly connected with the locking nuts, and the locking nuts are located between the first valve seat and the heads of the adjusting screws.

[0016] In an alternative embodiment, the adjusting assembly further includes a plurality of first anti-loosening washers, each first anti-loosening washer is sleeved on an adjusting screw and abuts against the first valve seat and the locking nut respectively.

[0017] In an alternative embodiment, the fastening assembly includes a plurality of connecting screws, the first valve seat is evenly provided with a plurality of first mounting holes along its circumferential direction, the second valve seat is evenly provided with a plurality of second mounting holes along its circumferential direction, and the plurality of first mounting holes and the second mounting holes are arranged in a one-to-one correspondence;

[0018] One of the first mounting hole and the second mounting hole is a threaded hole, and the other is a through hole, and the connecting screw penetrates through the first mounting hole and the second mounting hole to tightly connect the first valve seat and the second valve seat.

[0019] In an alternative embodiment, the first mounting hole is a threaded hole, the connecting screw sequentially passes through the second mounting hole and the first mounting hole, the fastening assembly further includes a plurality of anti-loosening nuts, the connecting screw is threadedly connected with the anti-loosening nuts, and the anti-loosening nuts are located at one end of the first valve seat away from the second valve seat.

[0020] In an alternative embodiment, two anti-loosening nuts are threadedly connected to each connecting screw.

[0021] In an alternative embodiment, the fastening assembly further includes a plurality of second anti-loosening washers, each connecting screw is sleeved with a second anti-loosening washer, the second anti-loosening washer is located between the head of the connecting screw and one end of the second valve seat away from the first valve seat, and / or the second anti-loosening washer is located between the anti-loosening nut and one end of the first valve seat away from the second valve seat.

[0022] A butterfly valve provided by an embodiment of the present utility model includes a first valve seat, a second valve seat, a sealing assembly, a fastening assembly, and an adjusting assembly. The adjusting assembly is connected to both the first valve seat and the second valve seat simultaneously, and is used to adjust the axial clearance between the first valve seat and the second valve seat. The butterfly valve of this embodiment can adjust the sealing performance through the adjusting assembly to ensure the sealing performance of the butterfly valve in a dry powder environment, ensure flexible and reliable opening and closing, reduce the resistance during the opening and closing process of the butterfly valve, and ensure the sealing performance and service life of the butterfly valve after multiple openings and closings. Description of the Drawings

[0023] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of the butterfly valve provided by the embodiment of the present utility model from the first perspective;

[0025] Figure 2 It is a schematic structural diagram of the butterfly valve provided by the embodiment of the present utility model from the second perspective;

[0026] Figure 3 It is a schematic cross-sectional view of the butterfly valve provided by the embodiment of the present utility model.

[0027] Reference numerals: 1 - butterfly valve; 100 - first valve seat; 110 - adjusting screw hole; 120 - first mounting hole; 200 - second valve seat; 210 - second mounting hole; 300 - mounting space; 400 - sealing assembly; 410 - butterfly valve core; 420 - sealing ring; 510 - adjusting screw; 520 - locking nut; 530 - first anti-loosening spring washer; 610 - connecting screw; 620 - anti-loosening nut; 630 - second anti-loosening spring washer. Detailed Embodiments

[0028] In order to make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0029] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0030] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0032] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0033] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The following will introduce in detail the specific structure of a butterfly valve provided by the embodiments of the present invention and the corresponding technical effects brought thereby with reference to the patent drawings.

[0035] Please refer to Figures 1 - 3 , a butterfly valve 1 provided by an embodiment of the present invention includes a first valve seat 100, a second valve seat 200, a sealing assembly 400, a fastening assembly, and an adjusting assembly.

[0036] The first valve seat 100 and the second valve seat 200 are axially connected in sequence, and an installation space 300 is defined between the first valve seat 100 and the second valve seat 200. A sealing assembly 400 is installed in the installation space 300. The sealing assembly 400 includes a butterfly valve core 410 and a sealing ring 420. The two end faces of the sealing ring 420 are respectively abutted against the first valve seat 100 and the second valve seat 200, and the outer peripheral surface of the butterfly valve core 410 is abutted against the inner peripheral surface of the sealing ring 420. Specifically, the first valve seat 100 and the second valve seat 200 are connected by a fastening assembly fastener, and the adjusting assembly is connected to both the first valve seat 100 and the second valve seat 200 at the same time. The adjusting assembly is used to adjust the axial clearance between the first valve seat 100 and the second valve seat 200.

[0037] It should be noted that for the butterfly valve 1 installed on the discharge pipe of the spray dryer in the prior art, since the opening and closing of the butterfly valve 1 are very frequent during the continuous production process, and the butterfly valve 1 is mainly used in the liquid material environment, generally, the first valve seat 100 and the second valve seat 200 of the butterfly valve 1 will be completely locked by fasteners, so that the inner peripheral surface of the sealing ring 420 protrudes towards the butterfly valve core 410 until the butterfly valve core 410 cannot protrude any further to ensure the sealing performance of the butterfly valve 1. When the protrusion degree of the sealing ring 420 is relatively large, it will increase the wear of the butterfly valve core 410 during opening and closing, and also make the sealing ring 420 too hard to lose its resilience, resulting in the situation of sealing failure, thus affecting the service life.

[0038] It cannot adjust the protrusion degree of the inner peripheral surface of the sealing ring 420 towards the butterfly valve core 410 by adjusting the axial clearance between the first valve seat 100 and the second valve seat 200.

[0039] When applied to the discharge pipe of the spray dryer in the environment of dried powder, during the opening and closing process of the butterfly valve 1, the dried powder will make the resistance of the butterfly valve core 410 during opening and closing larger. Therefore, the new valve cannot ensure the sealing performance after being used for a short time, thus affecting the service life.

[0040] In a butterfly valve 1 provided in this embodiment, the axial gap between a first valve seat 100 and a second valve seat 200 can be adjusted through an adjusting assembly, so as to adjust the degree of extrusion of a sealing ring 420 between the first valve seat 100 and the second valve seat 200. And when the butterfly valve 1 provided in this embodiment is applied to the discharge pipe of a spray dryer, since it is in a dry powder environment, different from the liquid environment, it is not necessary to completely lock the first valve seat 100 and the second valve seat 200 so that the protruding degree of the sealing ring 420 towards the outer peripheral surface of the butterfly valve core 410 is the largest. The axial gap between the first valve seat 100 and the second valve seat 200 can be adjusted through the adjusting assembly to adjust the protruding degree of the sealing ring 420, so as to avoid completely locking the first valve seat 100 and the second valve seat 200 through a fastening assembly, so that the sealing ring 420 protrudes to the maximum extent under the pressing action of the first valve seat 100 and the second valve seat 200, resulting in the situation that the sealing ring 420 becomes too hard and loses its resilience, leading to seal failure. The sealing performance of the butterfly valve 1 in this embodiment can be adjusted to ensure the sealing performance of the butterfly valve 1 in a dry powder environment, ensure flexible and reliable opening and closing, reduce the resistance during the opening and closing process of the butterfly valve 1, and ensure the sealing performance and service life of the butterfly valve 1 after multiple opening and closings.

[0041] Specifically, the first valve seat 100 is provided with a plurality of adjusting screw holes 110, the axial direction of the adjusting screw holes 110 is parallel to the axial direction of the first valve seat 100, the adjusting assembly includes a plurality of adjusting screw rods 510, and the plurality of adjusting screw rods 510 are correspondingly installed in the adjusting screw holes 110. The end of the adjusting screw rod 510 away from its head abuts against the end surface of the second valve seat 200. It can be understood that by rotating the adjusting screw rod 510 in the adjusting screw hole 110, the screw can move axially, thereby adjusting the axial gap between the first valve seat 100 and the second valve seat 200, and thus adjusting the situation of the first valve seat 100 and the second valve seat 200 squeezing the sealing ring 420.

[0042] It should be noted that the plurality in this embodiment refers to a quantity of two or more.

[0043] Optionally, in order to ensure that the axial gaps between the first valve seat 100 and the second valve seat 200 at various positions are relatively uniform, the plurality of adjusting screw holes 110 are arranged at equal intervals, and the axes of the plurality of adjusting screw holes 110 all pass through a preset path. The preset path is circular and its axis is coaxial with the axes of the first valve seat 100 and the second valve seat 200.

[0044] Specifically, in this embodiment, the number of the adjusting screw holes 110 and the adjusting screw rods 510 is four. Of course, in some other embodiments, the number of the adjusting screw holes 110 and the adjusting screw rods 510 can also be 2, 3, 5 or 6.

[0045] Specifically, the adjusting assembly further includes a plurality of locking nuts 520. Each adjusting screw 510 is threadedly connected with a locking nut 520. The locking nut 520 is located between the first valve seat 100 and the head of the adjusting screw 510. Specifically, the connection strength between the adjusting screw 510 and the first valve seat 100 can be effectively ensured by the locking nut 520.

[0046] It should be noted that in order to shake the dried material powder in the discharge pipe into the receiving belt connected to the discharge pipe, a vibration device is also installed on the spray dryer. Under the action of the vibration device, it is easy for the fasteners on the existing butterfly valve 1 to become loose.

[0047] However, under the action of the locking nut 520 in this embodiment, the connection strength between the adjusting screw 510 and the first valve seat 100 can be ensured, and at the same time, the gap between the first valve seat 100 and the second valve seat 200 can also be adjusted by screwing the locking nut 520.

[0048] Specifically, in this embodiment, the adjusting assembly further includes a plurality of first anti-loosening washers 530. Each first anti-loosening washer 530 is sleeved on an adjusting screw 510 and abuts against the first valve seat 100 and the locking nut 520 respectively. Specifically, the two end faces of the first anti-loosening washer 530 in the axial direction abut against the locking nut 520 and the first valve seat 100 respectively.

[0049] It can be understood that the first anti-loosening washer 530 has a certain elasticity. Therefore, the first anti-loosening washer 530 can play a buffering role between the locking nut 520 and the first valve seat 100.

[0050] Specifically, in this embodiment, the fastening assembly includes a plurality of connecting screws 610. The first valve seat 100 is uniformly provided with a plurality of first mounting holes 120 along its own axis. The second valve seat 200 is uniformly provided with a plurality of second mounting holes 210 along its own axis. The plurality of first mounting holes 120 and the plurality of second mounting holes 210 are arranged in one-to-one correspondence. One of the first mounting hole 120 and the second mounting hole 210 is a threaded hole, and the other of the first mounting hole 120 and the second mounting hole 210 is a through hole. The connecting screw 610 penetrates into the first mounting hole 120 and the second mounting hole 210 to fasten the connection between the first valve seat 100 and the second valve seat 200.

[0051] Through the above-mentioned plurality of connecting screws 610, the connection strength between the first valve seat 100 and the second valve seat 200 can be effectively ensured, and the gap between the first valve seat 100 and the second valve seat 200 can be ensured to remain unchanged.

[0052] Specifically, in this embodiment, the number of the first mounting holes 120 and the second mounting holes 210 is six, and the first mounting holes 120 on the first valve seat 100 and the adjusting screw holes 110 on the first valve seat 100 are arranged at intervals.

[0053] It is understandable that by connecting the screw rod 610, the first valve seat 100 is threadedly connected to the second valve seat 200, which can ensure the connection strength between the first valve seat 100 and the second valve seat 200.

[0054] Specifically, the first mounting hole 120 is a threaded hole. The connecting screw rod 610 sequentially passes through the second mounting hole 210 and the first mounting hole 120. The fastening assembly further includes a plurality of check nuts 620. The check nut 620 is threadedly connected to the connecting screw rod 610, and the check nut 620 is located at one end of the first valve seat 100 away from the second valve seat 200.

[0055] In this embodiment, two check nuts 620 are threadedly connected to the connecting screw rod 610. The two check nuts 620 are used to achieve the double check function to ensure the connection strength between the first valve seat 100 and the second valve seat 200. Of course, in some other alternative embodiments, the number of check nuts 620 can also be one or three.

[0056] Optionally, the fastening assembly further includes a plurality of check washers. A second check washer 630 is sleeved on each connecting screw rod 610. The second check washer 630 is located between the head of the connecting screw rod 610 and one end of the second valve seat 200 away from the first valve seat 100, and / or the second check washer 630 is located between the check nut 620 and one end of the first valve seat 100 away from the second valve seat 200.

[0057] Specifically, in this embodiment, two second check washers 630 are sleeved on each connecting screw rod 610. One of the second check washers 630 is located between the head of the connecting screw rod 610 and one end of the second valve seat 200 away from the first valve seat 100, and the other is located between the check nut 620 and one end of the first valve seat 100 away from the second valve seat 200.

[0058] It is understandable that the butterfly valve 1 provided in this embodiment can adjust the degree of extrusion of the sealing ring 420 by the first valve seat 100 and the second valve seat 200 by adjusting the gap between the first valve seat 100 and the second valve seat 200, so as to realize the adjustable convex degree of the sealing ring 420 towards the butterfly valve core 410, ensuring the sealing performance of the valve and reliable opening and closing. The wear of the butterfly valve 1 during opening and closing is small, which greatly prolongs the service life of the butterfly valve 1. Multiple check functions prevent the connecting parts from loosening and falling off and prevent the valve gap from changing. Adjusting the sealing gap of the sealing ring 420 can ensure the resilience at the sealing point (surface) of the sealing ring 420, prevent the sealing ring 420 from being pressed too tightly at one time, the resilience at the sealing point (surface) of the sealing ring 420 is too hard and the resilience fails, and the sealing point (surface) of the sealing ring 420 is damaged by the valve core. After improvement, it effectively prevents the butterfly valve 1 from being damaged due to excessive resistance.

[0059] In summary, a butterfly valve 1 provided by an embodiment of the present utility model includes a first valve seat 100, a second valve seat 200, a sealing assembly 400, a fastening assembly, and an adjusting assembly. The adjusting assembly is connected to both the first valve seat 100 and the second valve seat 200, and is used to adjust the axial clearance between the first valve seat 100 and the second valve seat 200. For the butterfly valve 1 of this embodiment, the sealing performance can be adjusted through the adjusting assembly, so as to ensure the sealing performance of the butterfly valve 1 in a dry powder environment, ensure flexible and reliable opening and closing, reduce the resistance during the opening and closing process of the butterfly valve 1, and ensure the sealing performance and service life of the butterfly valve 1 after multiple opening and closing operations.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A butterfly valve, characterized in that, Comprising: A first valve seat; A second valve seat, the first valve seat and the second valve seat are axially connected in sequence, and an installation space is defined between the first valve seat and the second valve seat; A sealing assembly, the sealing assembly is installed in the installation space, the sealing assembly includes a butterfly valve core and a sealing ring, both end faces of the sealing ring are abutted against the first valve seat and the second valve seat respectively, and the outer peripheral surface of the butterfly valve core is abutted against the inner peripheral surface of the sealing ring; A fastening assembly, the first valve seat and the second valve seat are fastened and connected through the fastening assembly; An adjusting assembly, the adjusting assembly is connected to both the first valve seat and the second valve seat simultaneously, and is used for adjusting the gap between the first valve seat and the second valve seat in the axial direction.

2. The butterfly valve according to claim 1, wherein: The first valve seat is provided with a plurality of adjusting screw holes, the axial direction of the adjusting screw holes is parallel to the axial direction of the first valve seat, the adjusting assembly includes a plurality of adjusting screws, and the plurality of adjusting screws are respectively installed in the adjusting screw holes in a one-to-one correspondence, and one end of the adjusting screw away from its head abuts against the end face of the second valve seat.

3. The butterfly valve according to claim 2, wherein: The plurality of adjusting screw holes are evenly spaced, and the axes of the plurality of adjusting screw holes all pass through a preset path, the preset path is circular and the axis is coaxial with the axes of the first valve seat and the second valve seat.

4. The butterfly valve according to claim 3, wherein: The number of the plurality of adjusting screw holes and the adjusting screws is four.

5. The butterfly valve according to claim 2, wherein: The adjusting assembly further includes a plurality of locking nuts, the adjusting screws are threadedly connected with the locking nuts, and the locking nuts are located between the first valve seat and the heads of the adjusting screws.

6. The butterfly valve according to claim 5, wherein: The adjusting assembly further includes a plurality of first anti-loosening spring washers, each first anti-loosening spring washer is sleeved on one adjusting screw and respectively abuts against the first valve seat and the locking nut.

7. The butterfly valve according to claim 1, wherein: The fastening assembly includes a plurality of connecting screws, the first valve seat is evenly provided with a plurality of first mounting holes along its circumferential direction, the second valve seat is evenly provided with a plurality of second mounting holes along its circumferential direction, and the plurality of first mounting holes and the second mounting holes are arranged in a one-to-one correspondence; One of the first mounting hole and the second mounting hole is a threaded hole, and the other is a through hole, and the connecting screw penetrates into the first mounting hole and the second mounting hole to fasten and connect the first valve seat and the second valve seat.

8. The butterfly valve according to claim 7, wherein: The first mounting hole is a threaded hole, the connecting screw sequentially passes through the second mounting hole and the first mounting hole, the fastening assembly further includes a plurality of anti-loosening nuts, the connecting screw is threadedly connected with the anti-loosening nuts, and the anti-loosening nuts are located at one end of the first valve seat away from the second valve seat.

9. The butterfly valve according to claim 8, wherein: Two anti-loosening nuts are threadedly connected to each connecting screw.

10. The butterfly valve according to claim 8, wherein: The fastening assembly further includes a plurality of second anti-loosening washers, each of the connecting screws is sleeved with the second anti-loosening washer, the second anti-loosening washer is located between the head of the connecting screw and the end of the second valve seat away from the first valve seat, and / or the second anti-loosening washer is located between the anti-loosening nut and the end of the first valve seat away from the second valve seat.

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