CN116951121A

CN116951121A - Pneumatic gate valve

Info

Publication number: CN116951121A
Application number: CN202311044301.XA
Authority: CN
Inventors: 贺燕麒
Original assignee: Changsha Dingzhi Intelligent Technology Co ltd
Current assignee: Changsha Dingzhi Intelligent Technology Co ltd
Priority date: 2023-08-18
Filing date: 2023-08-18
Publication date: 2023-10-27

Abstract

The invention relates to the field of gate valves, in particular to a pneumatic gate valve, which comprises a valve body and a channel for materials to pass through, wherein a valve plate is installed in the channel in a matched manner, a containing cavity for containing the valve plate when the channel is opened is formed in the valve body, a power device connected with the valve plate is arranged on the valve body and used for driving the valve plate to move, a baffle ring is arranged at the position corresponding to the valve plate in the channel, a sealing ring is arranged on the side surface of the baffle ring corresponding to the valve plate, the sealing ring comprises a sealing end and a fixed end, the sealing end is used for sealing between the baffle ring and the valve plate, the fixed end is embedded in the side surface of the baffle ring, a pressing device is arranged in the channel and used for pressing the valve plate on the sealing end, the sealing between the valve plate and the baffle ring is ensured through the sealing ring and the pressing device, leakage is reduced, and stable operation of the device is ensured.

Description

Pneumatic gate valve

Technical Field

The invention relates to a gate valve, in particular to a pneumatic gate valve.

Background

The pneumatic gate valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like, and because some pneumatic gate valves are used for conveying granular media, granular objects in the media easily block the sealing parts of the valve body and the opening and closing member, or wear the sealing parts of the valve body and the opening and closing member to influence the sealing effect, gas leakage is easily caused, and meanwhile, in the long-time use process, some sealing members are easy to fall off to cause the poor sealing effect.

The utility model discloses a closed pneumatic push-pull valve of publication No. CN201539592U, discloses a pneumatic push-pull valve through installing the sealing washer in valve plate sealing department for promote pneumatic push-pull valve's leakproofness, but its adoption conventional sealing washer is after long-time use, and the sealing washer is shrink, ageing, under the extrusion of valve plate a lot of, just leads to the sealing washer to drop easily, and influences the leakproofness.

Disclosure of Invention

The invention aims to solve the technical problems that: in the long-time use process, the problem that the pneumatic gate valve sealing ring falls off is caused.

In order to solve the technical problems, the invention adopts the following technical scheme:

firstly, provide a pneumatic push-pull valve, including the valve body to and set up the passageway that supplies the material to pass through, the valve plate is installed to passageway internal fit, set up on the valve body and be used for holding the valve plate and open the chamber that holds when passageway, be provided with the power device who is connected with the valve plate on the valve body for drive the valve plate and remove, its characterized in that, the position department that corresponds the valve plate in the passageway is provided with the baffle ring, and the side that the baffle ring corresponds the valve plate is provided with the sealing washer, the sealing washer is including the stiff end that is used for sealed and is used for preventing to drop, the sealing end is used for sealing between baffle ring and the valve plate, the stiff end is embedded in the baffle ring side, the extending direction of stiff end is the flaring form, be provided with closing device in the passageway for compress tightly the valve plate on the stiff end, power device includes the cylinder, the cylinder is connected with the valve plate for drive the valve plate along the direction of delivery who is perpendicular to passageway removes, the cylinder is located the both sides that hold the chamber relatively with the passageway.

Further, the compressing device comprises a rotating cylinder, a plurality of rotating cylinders are arranged at circumferential positions of the outer side face of the valve body, rotating shafts of the rotating cylinders penetrate through the side faces of the valve body and extend into the channels, eccentric shafts are sleeved on the rotating shafts of the rotating cylinders, bearings are sleeved on the eccentric shafts, and the valve plate is located between the eccentric shafts and the baffle rings.

Further, an annular sealing plate is arranged between the side surface, far away from the valve plate, of the baffle ring and the channel.

Further, an annular gap matched with the shape of the fixed end is formed in the side face of the baffle ring and used for accommodating the fixed end.

Further, the section of the sealing ring is trapezoid, the small end of the trapezoid is a sealing end, and the large end of the trapezoid is a fixed end.

Further, the cross section of sealing washer is trapezoidal, the tip on the trapezoid is sealed end, the tip on the trapezoid is the stiff end, all be provided with a plurality of annular archs on stiff end medial surface and the lateral surface, the breach side corresponds bellied position department and has seted up the annular groove of adaptation.

Further, the sizes of the protrusions on the fixed end are different, and the size distribution of the protrusions is sequentially reduced along the direction from the sealed end to the fixed end.

Further, the inner side surface and the outer side surface of the fixed end are provided with first steps.

Further, second steps are arranged on the inner side face and the outer side face of the fixed end, and third steps are arranged on the second steps towards the direction of the fixed end.

Further, a connector is arranged at the joint of the air cylinder and the valve plate, the valve plate is movably connected with the connector through a pin shaft, a reset spring is sleeved on the pin shaft, and the reset spring is used for connecting the valve plate with the connector.

The invention has the following beneficial effects: according to the invention, the sealing effect is realized by arranging the sealing ring between the valve plate and the baffle ring, so that the valve plate and the baffle ring are not in direct rigid contact, the abrasion is reduced, the service life is prolonged, the valve plate is pressed on the sealing ring by the pressing device, and a good sealing effect is realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of the present embodiment;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is an enlarged view at A of FIG. 3;

FIG. 4 is a schematic view of a compressing apparatus according to the present embodiment;

FIG. 5 is a schematic structural view of a first embodiment of a seal ring;

FIG. 6 is a schematic structural view of a second embodiment of a seal ring;

FIG. 7 is a schematic structural view of a third embodiment of a seal ring;

FIG. 8 is a schematic structural view of a fourth embodiment of a seal ring;

fig. 9 is a schematic diagram of a connection relationship between a valve plate and a cylinder in the present embodiment.

Detailed Description

The invention will be better explained by the following detailed description of the embodiments with reference to the drawings.

It should be noted that all the directional indicators in the embodiments of the present invention are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The invention provides a pneumatic gate valve, as shown in figure 1, comprising a valve body 20, wherein a channel 21 is arranged on the valve body 20, the channel 21 is used for allowing materials to pass through, and the transfer of the materials is realized, wherein a valve plate 22 is arranged in the valve body 20, the valve plate 22 is used for opening and closing the channel 21, when the valve plate 22 is positioned in the channel 21, the channel 21 is closed, when the valve plate 22 is misplaced with the channel 21, the channel 21 is opened, and the materials pass through, in the embodiment, a containing cavity 10 is arranged on the valve body 20, wherein the containing cavity 10 is used for containing the situation when the valve plate 22 is opened by the channel 21.

Specifically, as shown in fig. 1 and 2, in this embodiment, the accommodating chamber 10 is disposed at the upper portion of the valve body 20, the channel 21 is disposed at the lower portion of the valve body 20, the material is transported from right to left, the valve plate 22 moves up and down between the accommodating chamber 10 and the channel 21, in order to drive the valve plate 22 to move, the cylinder 60 is mounted on the top of the valve body 20, the cylinder 60 is connected with the valve plate 22 through the side surface of the valve body 20, when the cylinder 60 is shortened, the valve plate 22 moves up and enters the accommodating chamber 10, and when the cylinder 60 is extended, the cylinder 60 moves toward the channel 21, wherein the cylinder 60 and the channel 21 are located at two opposite sides of the accommodating chamber 10.

In order to improve the sealing effect between the valve plate 22 and the channel 21, as shown in fig. 2 and 3, in this embodiment, an adaptive baffle ring 24 is disposed in the channel 21, and the outer side of the baffle ring 24 is in sealing connection with the side surface of the channel 21, wherein when the valve plate 22 moves into the channel 21, the side surface of the valve plate 22 is attached to the side surface of the baffle ring 24 at this time, so as to realize the sealing of the valve plate 22 to the channel 21, and in order to further improve the sealing effect, a sealing ring 30 is mounted on the side surface of the baffle ring 24 in contact with the valve plate 22, and the sealing ring 30 is used for sealing the gap between the valve plate 22 and the baffle ring 24.

As shown in fig. 3, when some powder particles are conveyed, the materials are prevented from being adhered to the channel 21, at this time, an annular sealing plate 23 is arranged between the side surface of the baffle ring 24 far away from the valve plate 22 and the channel 21, the annular sealing plate 23 is used for sealing the corner between the baffle ring 24 and the channel 21, the materials are prevented from being accumulated on the side surface of the baffle ring 24, and under the action of the sealing plate 23, the materials can pass along the side surface of the sealing plate 23, so that the materials cannot be accumulated on the channel 21, and the waste is reduced.

Specifically, in this embodiment, as shown in fig. 5, the sealing ring 30 includes a sealing end 31 and a fixed end 32, where the side surface of the baffle ring 24 is provided with an annular gap 50 adapted to the fixed end 32, where the fixed end 32 is embedded into the gap 50, the sealing end 31 is located at the outer end, and meanwhile, the sealing end 31 is flared toward the extending direction of the fixed end 32, so as to ensure that the sealing ring 30 is not easy to fall off from the gap 50, ensure that the sealing ring 30 has a sealing effect for a long time, and when the side surface of the valve plate 22 coincides with the side surface of the baffle ring 24, the sealing end 31 has a sealing effect between the valve plate 22 and the baffle ring 24.

Specifically, as shown in fig. 4, in order to improve the sealing effect of the sealing end 31, a plurality of rotary cylinders 40 are disposed at the circumferential position of the outer side surface of the valve body 20 corresponding to the channel 21, wherein the rotary shafts of the rotary cylinders 40 all penetrate through the side surfaces of the valve body 20 and extend into the channel 21, the rotary shafts of the rotary cylinders 40 are sleeved with eccentric shafts 41, the rotary cylinders 40 drive the eccentric shafts 41 to rotate, the valve plates 22 are located between the eccentric shafts 41 and the baffle rings 24, when the eccentric shafts 41 rotate, gaps exist between the proximal ends of the eccentric shafts 41 and the valve plates 22, the distal ends of the eccentric shafts 41 push the valve plates 22 to be pressed on the sealing end 31, and in order to prevent abrasion, the eccentric shafts 41 are sleeved with bearings 42, contact with the valve plates 22 through the bearings 42, so that abrasion is reduced, and a silencing effect is achieved.

In this embodiment, as shown in fig. 1, the cross section of the channel 21 is rectangular, and the bearings 42 disposed on the left and right sides of the channel 21 of the rotary cylinder 40 can also serve to guide the movement of the valve plate 22, specifically, first, the eccentric shaft 41 rotates so that the proximal end faces the valve plate 22, at this time, the side surfaces of the bearings 42 on the eccentric shaft 41 just contact with the side surfaces of the valve plate 22, and during the downward movement of the valve plate 22, the bearings 42 on the left and right sides guide the downward movement of the valve plate 22, so that the movement of the valve plate 22 is more stable.

Meanwhile, under the action of the eccentric shaft 41, in the process of overlapping the valve plate 22 with the baffle ring 24, the valve plate 22 can be firstly not tightly attached to the sealing end 31, a certain gap can exist between the valve plate 22 and the sealing end, abrasion to the sealing ring 30 is reduced, the service life is prolonged, and when the valve plate 22 moves in place, the eccentric shaft 41 rotates at the moment to enable the distal end to be in contact with the valve plate 22, so that the valve plate 22 is tightly pressed on the sealing ring 30 to realize sealing.

In order to ensure that the valve plate 22 is smoothly pressed on the sealing ring 30, as shown in fig. 9, a connector 63 is arranged at the joint of the air cylinder 60 and the valve plate 22, the valve plate 22 and the connector 63 are movably connected through a pin shaft 62, wherein the valve plate 22 can slide along the pin shaft 62, when the valve plate 22 is pressed on the sealing ring 30, the valve plate 22 moves on the pin shaft 62, meanwhile, in order to enable the valve plate 22 to return when the valve plate 22 is retracted, a return spring 61 is sleeved on the pin shaft 62, the return spring 61 is used for connecting the valve plate 62 and the connector 63, and when the eccentric shaft 41 does not press the valve plate 22, the return spring 61 pushes the valve plate 22 to return to the initial position, so that a certain gap exists between the return spring and the sealing ring 30.

First embodiment

As shown in fig. 5, the cross section of the sealing ring 30 is in a trapezoid-like shape between the sealing end 31 and the fixed end 32, wherein the small end of the trapezoid is a sealing end 31 and the valve plate 22, the large end of the trapezoid is the fixed end 32, and the trapezoid is installed in the notch 50, wherein when the fixed end 32 is embedded in the notch 50, the size of the opening of the notch 50 is smaller than that of the large end of the fixed end 32 because the fixed end 32 is gradually enlarged towards the inside of the notch 50, and the sealing ring 30 is still blocked in the notch 50 under the condition that the sealing ring 30 is contracted or deformed after long-term use.

Second embodiment

As shown in fig. 6, a trapezoid-like shape is formed between the sealing end 31 and the fixed end 32 in the cross section of the sealing ring 30, wherein the small end of the trapezoid is the sealing end 31 and the valve plate 22, the large end of the trapezoid is the fixed end 32, the trapezoid is installed in the notch 50, a plurality of annular protrusions 33 are installed on the inner side surface and the outer side surface of the fixed end 32, annular grooves 34 are formed in the positions, corresponding to the protrusions 33, of the side surfaces of the notch 50, of the protrusions 33, the grooves 34 are matched with each other, the protrusions 33 extend into the grooves 34, and the sealing ring 30 is not easy to fall off from the notches 50 under the action of the protrusions 33.

Specifically, during long-term use, if the sealing ring 30 is retracted, the protrusion 33 may be separated from the corresponding groove 34, but due to the different positions of the protrusion 33 at the fixed end 32, the corresponding widths are different, for example, the distance between the protrusions 33 near the large end in the inner side and the outer side of the fixed end 32 is larger than the distance between the protrusions 33 far from the large end, as shown in fig. 5, in this embodiment, the distance between the upper and lower protrusions 33 at the rightmost side is larger than the distance between the two protrusions 33 in the middle, and then, by analogy, during the process of retracting the sealing ring 30, the protrusion 33 near the large end moves into the next groove 34 to realize continuous clamping, and particularly, when the sealing ring 30 is detached, the protrusion 33 at the rightmost side moves into the groove 34 in the middle to ensure that the sealing ring 30 is not easy to separate.

In order to ensure that each protrusion 33 can be smoothly clamped into the next groove 33, the sizes of the protrusions 33 are different, and the sizes of the protrusions 33 decrease along the extending direction of the sealing end 31 towards the fixed end 32, so that the protrusions 33 can be smoothly clamped into the next groove 34, and the sealing ring 31 is conveniently installed into the notch 50, the large end of the fixed end 31 is in a convex arc shape, so that the sealing ring 30 is conveniently plugged into the notch 50.

Third embodiment

As shown in fig. 7, the inner side and the outer side of the fixed end 32 are provided with first steps 35, under the action of the first steps 35, the fixed end 35 is ensured to be stably embedded in the notch 50, and the sealing ring 30 can be caused to fall off only when the width of the first steps 35 is smaller than or close to the width of the opening of the notch 50 after the sealing ring 30 is contracted to a certain extent.

Fourth embodiment

As shown in fig. 8, the second step 36 and the third step 37 are disposed on the inner side and the outer side of the fixed end 32, and by disposing two steps, the sealing ring 30 can be more stably installed in the notch 50, when the sealing ring 30 contracts inwards, the second step 36 may be caused to fall off from the opening in the notch 50, but at this time, the third step 37 may be clamped to the position of the original second step 36, so as to realize continuous clamping, thereby preventing the sealing ring 30 from falling off.

In summary, as shown, the seal ring 30 with the flared sealing end 31 extending toward the fixed end 32 can effectively fix the seal ring in the notch 50, because the rubber material adopted by the common seal ring is made, the service life of the rubber seal ring is generally more than 1000 hours under the common working environment, and the rubber seal ring may have defects of shrinking, hardening or aging to fall off from the installation position, so that the seal ring exposed to the outside is easy to fall off from the installation position due to aging and shrinking in the state of repeatedly pressing and loosening the valve plate, the seal ring is scrapped due to the fact that the service life is not reached, and the pneumatic gate valve has no sealing effect, so that the maintenance cost is increased.

It should be understood that the above description of the specific embodiments of the present invention is only for illustrating the technical route and features of the present invention, and is for enabling those skilled in the art to understand the present invention and implement it accordingly, but the present invention is not limited to the above-described specific embodiments. All changes or modifications that come within the scope of the appended claims are intended to be embraced therein.

Claims

1. The pneumatic gate valve comprises a valve body (20) and a channel (21) for materials to pass through, wherein the channel (21) is internally provided with a valve plate (22) in a matched manner, the valve body (20) is provided with a containing cavity (10) for containing the valve plate (22) when the channel (21) is opened, the valve body (20) is provided with a power device connected with the valve plate (22) for driving the valve plate (22) to move, the pneumatic gate valve is characterized in that the position of the channel (21) corresponding to the valve plate (22) is provided with a baffle ring (24), the side surface of the baffle ring (24) corresponding to the valve plate (22) is provided with a sealing ring (30), the sealing ring (30) comprises a sealing end (31) for sealing and a fixed end (32) for preventing falling, the sealing end (31) is used for sealing between the baffle ring (24) and the valve plate (22), the fixed end (32) is internally embedded on the side surface of the baffle ring (24), the sealing end (31) is in a shape towards the extending direction of the fixed end (32), the channel (21) is internally provided with a pressing device for pressing the valve plate (22) corresponding to the side surface of the valve plate (22) and a sealing end (31) along the direction perpendicular to the direction of a delivery cylinder (60), the cylinder (60) is located on opposite sides of the receiving chamber (10) from the channel (21).

2. The pneumatic gate valve according to claim 1, wherein the pressing device comprises a rotary cylinder (40), a plurality of rotary cylinders (40) are arranged at circumferential positions of the outer side surface of the valve body (20) corresponding to the channel (21), rotary shafts of the rotary cylinders (40) penetrate through the side surfaces of the valve body (20) and extend into the channel (21), eccentric shafts (41) are sleeved on the rotary shafts of the rotary cylinders (40), bearings (42) are sleeved on the eccentric shafts (41), and the valve plate (22) is located between the eccentric shafts (41) and the baffle rings (24).

3. A pneumatic gate valve according to claim 1, characterized in that an annular closing plate (23) is mounted between the side of the baffle ring (24) remote from the valve plate (22) and the channel (21).

4. A pneumatic gate valve according to claim 1, wherein the baffle ring (24) is provided with an annular recess (50) on the side surface thereof, which is adapted to the shape of the fixed end (32), for receiving the fixed end (32).

5. A pneumatic gate valve according to claim 4, wherein the cross section of the sealing ring (30) is trapezoidal, the small end of the trapezoid is a sealing end (31), and the large end of the trapezoid is a fixed end (32).

6. The pneumatic gate valve according to claim 4, wherein the cross section of the sealing ring (30) is trapezoid, the small end on the trapezoid is a sealing end (31), the large end on the trapezoid is a fixed end (32), a plurality of annular protrusions (33) are arranged on the inner side surface and the outer side surface of the fixed end (32), and an adaptive annular groove (34) is formed in the position, corresponding to the protrusions (33), of the side surface of the notch (50).

7. A pneumatic gate valve according to claim 6, characterized in that the protrusions (33) on the fixed end (32) are of different sizes, the size distribution of the protrusions (33) decreasing in sequence in the direction of the sealed end (31) towards the fixed end (32).

8. A pneumatic gate valve according to claim 4, wherein the fixed end (32) is provided with a first step (35) on the inner and outer sides.

9. A pneumatic gate valve according to claim 4, characterized in that the inner side and the outer side of the fixed end (32) are provided with second steps (36), and the second steps (36) are provided with third steps (37) in the direction of the fixed end (32).

10. The pneumatic gate valve according to claim 1, wherein a connector (63) is arranged at the joint of the air cylinder (60) and the valve plate (22), the valve plate (22) is movably connected with the connector (63) through a pin shaft (62), a return spring (61) is sleeved on the pin shaft (62), and the return spring (61) is used for connecting the valve plate (62) with the connector (63).