CN216430531U

CN216430531U - Knife switch valve

Info

Publication number: CN216430531U
Application number: CN202122314669.6U
Authority: CN
Inventors: 沈坤地; 林政庆; 沈鍾潜; 沈哲平
Original assignee: Huaxin Precision Valve Taechnology Co ltd; Hangzhou Huayue Intelligent Technology Co ltd
Current assignee: Huaxin Precision Valve Taechnology Co ltd; Hangzhou Huayue Intelligent Technology Co ltd
Priority date: 2021-09-10
Filing date: 2021-09-24
Publication date: 2022-05-03
Anticipated expiration: 2031-09-24
Also published as: TWM621203U

Abstract

The utility model provides a knife switch valve contains stand, driving source, valve body, seal assembly, sealing flange and knife switch board. The driving source is arranged at one end of the support frame. The valve body is arranged at the other end of the support frame and is provided with a valve, a flashboard channel and a packing groove. The gate passage communicates with the valve and has a first inner diameter, and the packing groove communicates with the gate passage and has a second inner diameter greater than the first inner diameter. The sealing assembly comprises a sealing support member, a packing and a leakage stopping member. The seal support has a first and second joined body section, the first body section being located in the gate passage and the second body section being located in the packing pocket. The packing and the leakage stopping piece are arranged in the packing groove. The sealing flange is arranged on the valve body and is abutted against the sealing assembly. The shutter plate is connected to the drive source and displaceably extends into the shutter passage.

Description

Knife switch valve

Technical Field

The utility model relates to a fluid control valve, in particular to knife switch valve.

Background

In daily life there is a wide variety of objects to be transported, wherein the transport demand for bulk objects exists in various fields, such as the transport of powdery, granular objects of ores, coal, grains, sand, cement, food materials and even various industrial raw materials. At present, methods for transporting bulk materials can be broadly classified into three major categories, mechanical transportation, fluid pipe transportation, and container transportation, according to the transportation principle.

Wherein the container transportation requires a lot of manual cooperation and thus cannot be completed fully automatically. Mechanical transport involves complex mechanical arrangements, is often limited in its applicability by space requirements, and is also less able to avoid contamination of the surrounding environment. The fluid pipeline transportation can transport objects by taking fluid as a carrier in a closed pipeline, has high transportation efficiency, small occupied area, low cost and less pollution, and can be fully automated.

In practical applications, the transportation method can be selected according to the material characteristics of the transported object, and the fluid pipeline transportation has the excellent characteristics, so that the fluid pipeline transportation is one of the most widely used object transportation methods at present.

The fluid pipeline transportation can be divided into liquid medium transportation or gaseous medium transportation according to the transportation carrier. The fluid pipeline conveying of the gaseous medium conveying object is based on the gas dynamics applied to object conveying, and the gas dynamics applied to the micro object conveying has high conveying efficiency, is easy to realize automation and is not easy to cause environmental pollution. The mass of powder and particle body which need to be converted many times in the production process of the automatic continuous process has small volume (0.5-10 mm)³) The monomer is extremely light in weight and is subject to gas blowing, so that the powdery and granular objects are particularly suitable for gas-dynamic application in object transportation in gaseous media.

In a pipeline for transporting objects by using gaseous medium according to gas dynamics, a knife valve is usually configured to control the opening and closing of the pipeline, so as to control the input or output of the objects in the pipeline according to the requirement. However, when the knife gate is located under the pipeline and has to bear the weight of the object to be conveyed for a long time, the tightness and smoothness of the knife gate may be affected, and therefore, it is necessary to provide a knife gate which can operate stably and has satisfactory tightness.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a knife switch valve can stabilize function and sealing performance and accord with the demand.

To achieve the above object, the present invention provides a knife gate valve, which comprises:

a support frame;

a driving source, which is arranged at one end of the supporting frame;

the valve body is arranged at the other end of the support frame and is provided with a valve, a flashboard channel and a filling groove, the flashboard channel is communicated with the valve and is provided with a first inner diameter, the filling groove is communicated with the flashboard channel and is provided with a second inner diameter, and the second inner diameter is larger than the first inner diameter;

a seal assembly, comprising:

a seal support having a first and a second joined trunk portion, the first trunk portion being located within the gate passage and the second trunk portion being located within the packing pocket;

at least one filler arranged in the filler groove; and

the leakage-stopping piece is arranged in the packing groove;

the sealing flange is arranged on the valve body and abuts against the sealing assembly; and

a shutter plate connected to the driving source and movably inserted into the shutter passage.

The gate valve is disposed in the gate passage, wherein the gate passage extends in a first direction through the valve body, and the gate passage extends in a second direction perpendicular to the first direction.

The above gate valve, wherein the filler is a braided ring structure formed by braiding a plurality of fibers.

In the above-described gate valve, the packing has a laminated structure in which a plurality of sheets are laminated.

The above knife gate valve, wherein the packing is of a single structure.

In the above knife switch valve, the number of the fillers is two, and the two fillers are respectively disposed on two different sides of the leakage stopping member.

In the above knife gate valve, the sealing flange has a flange portion and a pressing portion connected with each other, the pressing portion is located at a central position of one side of the flange portion, the flange portion is connected to the valve body, and the pressing portion extends into the packing groove and presses against the sealing assembly.

In the aforementioned gate valve, a joint of the gate passage and the packing groove has an abutting shoulder, and a joint of the first body section and the second body section of the sealing support abuts against the abutting shoulder.

The support frame comprises a plate body and a plurality of support legs, the driving source is arranged on one side of the plate body, one ends of the support legs are arranged on the other side of the plate body, and the valve body is arranged at the other ends of the support legs.

In the aforementioned knife switch valve, the driving source includes a pneumatic cylinder and a driving rod, one end of the driving rod is located in the pneumatic cylinder in a telescopic displacement manner, and the other end of the driving rod is connected to the knife switch plate.

In the above knife switch valve, a through hole is disposed at the center of the plate body, and the driving rod passes through the through hole and can linearly displace within a range surrounded by the plurality of support legs.

Therefore, the sealing component is provided with the sealing support piece comprising the first body section and the second body section, the second body section of the sealing support piece can generate radial force with the filler and the leakage stopping piece simultaneously to exert the sealing effect, and the first body section can keep the shape to stably support the knife board, so that the smooth action of the knife board and the sealing performance of the whole knife valve are ensured.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

Drawings

Fig. 1 is a partially exploded perspective view of an embodiment of a knife gate valve according to the present invention;

fig. 2 is a perspective assembly view of an embodiment of a knife gate valve of the present invention;

fig. 3 is a first schematic plan view of an embodiment of the knife gate valve of the present invention;

fig. 4 is a second schematic plan view of an embodiment of a knife gate valve of the present invention;

FIG. 5 is an enlarged partial view of the circled portion 5 of FIG. 4;

fig. 6 is a schematic perspective view of a seal support member according to an embodiment of the knife gate valve of the present invention.

Wherein the reference numerals

10 support frame

11: plate body

111: through hole

12: support leg

20 driving source

21: pneumatic cylinder

22 drive rod

30: valve body

31: valve

32 gate passage

33 packing groove

34 against the shoulder

40 sealing assembly

41 sealing support

411 first torso

412 second torso part

42, filler

43 leak stopping member

50: sealing flange

51 flange part

52 pressing part

60 knife switch board

D1 first direction

D2 second direction

Detailed Description

The following describes the structural and operational principles of the present invention in detail with reference to the accompanying drawings:

referring to fig. 1 to 6, fig. 1 is a schematic perspective exploded view of a partial structure of a knife switch valve according to an embodiment of the present invention; fig. 2 is a perspective assembly view of an embodiment of a knife gate valve of the present invention; fig. 3 is a first schematic plan view of an embodiment of the knife gate valve of the present invention; fig. 4 is a second schematic plan view of an embodiment of a knife gate valve of the present invention; FIG. 5 is an enlarged partial view of the circled portion 5 of FIG. 4; fig. 6 is a schematic perspective view of a seal support member according to an embodiment of the knife gate valve of the present invention.

The utility model discloses knife switch valve is suitable for and sets up in order to change the state of opening and close of pipeline in the pipe network of transported substance material. The utility model discloses an embodiment of knife switch valve contains support frame 10, driving source 20, valve body 30, seal assembly 40 and knife switch board 60. The driving source 20 and the valve body 30 are disposed on the holder 10, the knife plate 60 is driven by the driving source 20 to be displaceable in the valve body 30 to open and close the valve 31 of the valve body 30, and the sealing assembly 40 is disposed on a displacement path of the knife plate 60 to support the knife plate 60 and provide a sealing effect.

Referring to fig. 1 and 2, in an embodiment, the supporting frame 10 is a hollow frame body for fixing the driving source 20 and the valve body 30 and providing a space for accommodating the knife switch plate 60 when the knife switch plate is separated from the valve 31. In this embodiment, the holder 10 includes a plate 11 and a leg 12, wherein one side of the plate 11 is provided for the driving source 20, one end of the leg 12 is disposed on the other side of the plate 11, and the valve body 30 is connected to the other end of the leg 12. It should be noted that, in the embodiment shown in fig. 1 and fig. 2, the supporting frame 10 is composed of a plate 11 and four cylindrical supporting legs 12, the plate 11 is a rectangular plate, and the four supporting legs 12 are disposed at four corners of the plate 11, but the invention is not limited thereto.

In the embodiment of configuring the valve body 30 with different space requirements or specifications, the shape of the plate body 11 and the shape or number of the legs 12 can be changed to meet different requirements, for example, the legs 12 can be changed to two flat plates and disposed on two opposite sides of the plate body 11 to form the support frame 10.

The driving source 20 is disposed at one end of the holder 10 and connected to the knife plate 60. Referring to fig. 1 and 2, in an embodiment, the driving source 20 is a Pneumatic driving source, in this embodiment, the Knife Gate Valve is a Pneumatic Knife Gate Valve (KGVP), but the present invention is not limited thereto.

Referring to fig. 1 and 2, the driving source 20 includes a pneumatic cylinder 21 and a driving rod 22, one end of the driving rod 22 is movably disposed in the pneumatic cylinder 21, and the other end of the driving rod 22 is connected to the knife plate 60 and is telescopically displaced outside the pneumatic cylinder 21. Here, the cylinder 21 of the driving source 20 is fixed to one side of the plate 11 of the support frame 10, and the plate 11 has a through hole 111 at a central position thereof through which the driving rod 22 passes to be telescopically displaceable on the other side of the plate 11. When the pneumatic cylinder 21 is actuated, the driving rod 22 drives the knife switch 60 to linearly displace within the range surrounded by the supporting legs 12.

In one embodiment, the driving source 20 is a Manual driving source (not shown), in this embodiment, the Knife Gate Valve is a Manual Knife Gate Valve (KGVM), but the present invention is not limited thereto.

Here, the driving source 20 includes a manual rotating plate, a screw rod and a nut, the manual rotating plate is pivotally connected to one side of the plate 11 of the supporting frame 10, the screw rod is pivotally connected to the other side of the plate 11 and is connected to the manual rotating plate to be driven by the manual rotating plate, and the nut is threadedly installed outside the screw rod and is connected to the knife switch 60. When the manual turntable rotates, the screw is driven to rotate, and the nut screwed on the screw can generate linear displacement along the screw and synchronously drive the knife gate 60 to move in a stretching manner.

Referring to fig. 1 to 4, in one embodiment, the valve body 30 is disposed at the other end of the holder 10 and has a valve 31, a shutter passage 32, and a packing groove 33. Herein, the valve body 30 is fixed to the other end of the leg 12 of the holder 10, the valve 31 of the valve body 30 penetrates the valve body 30, the shutter passage 32 communicates with the valve 31 and has a first inner diameter, and the packing groove 33 communicates with the shutter passage 32 and has a second inner diameter greater than the first inner diameter.

Referring to fig. 3 and 4, in some embodiments, the junction of the ram channel 32 and the packing groove 33 forms an abutment shoulder 34 due to the difference in inner diameter.

Referring to fig. 3 and 4, in some embodiments, the connection direction of the two ends of the valve 31 is the first direction D1, that is, the valve 31 penetrates the valve body 30 along the first direction D1, and the gate passage 32 extends along the second direction D2 perpendicular to the first direction D1, but the invention is not limited thereto.

Referring to fig. 3-6, in some embodiments, the sealing assembly 40 is disposed in the packing groove 33 and cooperates with the sealing flange 50 to ensure the sealing effect between the knife gate 60 and the valve body 30. Herein, the sealing assembly 40 includes a sealing support 41, at least one packing 42 and a leakage stopper 43. The sealing support 41, the packing 42 and the leakage stopper 43 are sequentially accommodated in the packing groove 33 in a close contact manner, wherein the sealing support 41 is located in the ram channel 32 and partially in the ram channel 32 compared with the packing 42 and the leakage stopper 43. And sealing flange 50 is attached to valve body 30 and is pressed against seal assembly 40.

Referring to fig. 5 and 6, the sealing support 41 is a hollow structure having a through opening, and the shape of the through opening depends on the shape of the knife plate 60, and the shape of the through opening corresponds to the external shape of the knife plate 60 for the knife plate 60 to pass through and to be attached to the external surface of the knife plate 60. Further, the seal holder 41 is integrally formed by joining the first trunk 411 and the second trunk 412, the appearance and size of the first trunk 411 correspond to the shape of the shutter passage 32 in the second direction D2, and the appearance of the second trunk 412 corresponds to the shape of the packing groove 33 in the second direction D2. In this embodiment, since the gate passage 32 and the packing groove 33 have a different inner diameter, the appearance of the sealing support 41 is similar to a T-shape. The first trunk 411 of the sealing support 41 is received in the gate passage 32, the second trunk 412 is received in the packing groove 33, and the joint of the first trunk 411 and the second trunk 412 is correspondingly abutted against the abutting shoulder 34.

In some embodiments, the sealing support 41 is made of Polytetrafluoroethylene (PTFE) to provide good corrosion resistance, insulation, high and low temperature resistance, self-lubrication and surface non-stickiness of the sealing assembly 40, but the present invention is not limited thereto.

Referring to fig. 5 and 6, in some embodiments, the sealing assembly 40 includes at least one filler 42, but the present invention is not limited thereto. The amount of packing 42 may also be two, three or more when the valve body 30 is sized differently or has different sealing requirements.

Further, in some embodiments, the filler 42 is a soft filler, which means a filler that can deform after being compressed, and the filler 42 is deformed by applying a force to the filler 42, so that the filler 42 can be tightly attached to the filler groove 33, thereby ensuring the sealing effect.

In some embodiments, the filler 42 is a braided ring structure formed by braiding a plurality of fibers, but the present invention is not limited thereto. Here, the packing 42 is integrally woven in a ring shape to be received in the packing groove 33 and to be fitted over the outer surface of the knife board 60.

In embodiments where the filler 42 is a woven ring structure formed by weaving a plurality of fibers, the fibers may be, but are not limited to, natural fibers, mineral fibers, synthetic fibers, ceramic fibers, or metal fibers. The synthetic fiber may also be, but not limited to, polytetrafluoroethylene fiber, carbon fiber, phenolic fiber, and aramid fiber.

In some embodiments, the filler 42 is a laminated structure made up of a plurality of laminated sheets. In this embodiment, the filler 42 is formed by coating an adhesive on asbestos or fiber cloth and then laminating, bonding or winding the asbestos or fiber cloth, and the filler 42 can be produced by press vulcanization, but the present invention is not limited thereto.

In some embodiments, the filler 42 is a molded filler. Herein, the filler 42 is a single structure made of a soft filler material by molding.

In embodiments where the filler 42 is a laminated filler or a molded filler, the filler 42 is made of a non-fibrous material. Herein, the filler 42 is made of soft graphite (expanded graphite), thereby providing the filler 42 with characteristics of compactness, impermeability, excellent self-wettability, and high temperature resistance. However, the present invention is not limited thereto. In other embodiments where the filler 42 is made of a non-fibrous material, the filler 42 may also be a rubber, an engineering plastic, or a metal material.

In some embodiments, the leakage stopping member 43 is a ring structure, and the leakage stopping member 43 is accommodated in the packing groove 33 and abuts against the packing 42 and is sleeved on the knife switch plate 60. Here, the leakage stopper 43 may be made of, but not limited to, nitrile rubber (NBR), ethylene propylene rubber (EPDM), silicone rubber (silica), fluorocarbon rubber (FKM), perfluorinated rubber (FFKM), or urethane rubber (PU).

Referring to fig. 5 and 6, in some embodiments, the sealing flange 50 is disposed on the valve body 30 and abuts against the sealing assembly 40. Here, the sealing flange 50 has a flange portion 51 and a pressing portion 52, the pressing portion 52 is formed to protrude from a central position of one side of the flange portion 51, the sealing flange 50 is locked to the valve body 30 by the flange portion 51, the pressing portion 52 extends into the packing groove 33 and presses against the sealing assembly 40, and the sealing assembly 40 is elastically deformed to tightly abut against the packing groove 33 by the pressing force of the pressing portion 52 on the sealing assembly 40, thereby generating a sealing effect.

It should be noted that, since the sealing assembly 40 of the present invention is provided with the sealing support 41, the second trunk portion 412 of the sealing support 41, the packing 42 and the leakage stopping member 43 can be deformed in the first direction D1 when the sealing flange 50 applies a pressing force in the second direction D2, so as to generate a sealing effect synchronously. In addition, since the seal support 41 further includes the first body 411, and the first body 411 extends into the gate passage 32 and is not abutted or supported in the second direction D2, when the sealing flange 50 applies a pressing force in the second direction D2, the first body 411 of the seal support 41 can be kept abutted against the gate plate 60 without any deformation, so that the gate plate 60 is stably supported, the strength of the gate plate 60 is improved, the possibility of deformation of the gate plate 60 due to stress is reduced, and the sealing performance between the gate plate 60 and the valve body 30 is further ensured besides the operation stability of the gate plate 60 is improved.

In some embodiments, when the knife gate valve uses different conveying mediums of the conveying pipe network, the material of the packing 42 of the sealing assembly 40 can be changed according to the property of the conveying medium, the operating temperature of the conveying pipe network, the operating pressure of the conveying pipe network and the conveying speed, so that the material, the quantity and the position configuration of the packing 42 of the sealing assembly 40 can be changed.

Referring to fig. 4 and 5, in the embodiment shown in fig. 4 and 5, the sealing assembly 40 includes a sealing support 41, two packings 42, and a leakage stopper 43. In this embodiment, the sealing support 41 of the sealing assembly 40 is also disposed at the boundary between the packing groove 33 and the gate passage 32, wherein one packing 42 abuts against the second trunk 412 of the sealing support 41, and the leakage stopper 43 abuts against and is disposed between the two packings 42.

In some embodiments, to improve the sealing performance of the sealing assembly 40, when the sealing assembly 40 includes two fillers 42, the two fillers 42 are not limited to the same material and structure, and the two fillers 42 may also be different materials or different composition structures. By combining the fillers 42 of different materials or structures through the difference of the lateral pressure coefficients and the rebound resilience of the fillers 42 of different materials or structures, the sealing effect of the sealing assembly 40 can be further improved. For example, the two fillers 42 may be used in combination of soft graphite and asbestos filler or carbon fiber filler, respectively.

In addition, in some embodiments of the present invention, since the packing 42 is deformed by the force applied by the pressing portion 52 of the sealing flange 50, and the sealing flange 50 and the components of the sealing assembly 40 are distributed in different second directions D2, when the sealing assembly 40 is provided with a plurality of packings 42, the pressure applied to the packing 42 closer to the sealing flange 50 is the greatest, and the pressure applied to the packing 42 farther from the sealing flange 50 is gradually reduced, so that the packing 42 with a small deformation amount can be disposed at a position close to the sealing flange 50, and the packing 42 with a large deformation amount can be disposed at a position far from the sealing flange 50, thereby the packings 42 in different positions have different force differences, but the generated deformation can be closer, so that the sealing performance of the sealing assembly 40 as a whole is more uniform, thereby achieving the best sealing state.

Naturally, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and it is intended that all such changes and modifications be considered as within the scope of the appended claims.

Claims

1. A knife gate valve, comprising:

a support frame;

a driving source, which is arranged at one end of the supporting frame;

a seal assembly, comprising:

at least one filler arranged in the filler groove; and

the leakage-stopping piece is arranged in the packing groove;

2. The knife valve of claim 1, wherein the valve gate extends through the valve body in a first direction and the gate passage extends in a second direction perpendicular to the first direction.

3. The knife valve of claim 1, wherein the filler is a braided ring structure formed by braiding a plurality of fibers.

4. The knife valve of claim 1, wherein the filler is a laminated structure of a plurality of laminated sheets.

5. The knife valve of claim 1, wherein the filler is of a monolithic construction.

6. The knife gate valve of claim 1, wherein the number of the packing is two, and the two packings are respectively disposed on two different sides of the leakage-stopping member.

7. The knife gate valve of claim 1, wherein the sealing flange has a flange portion and a pressing portion connected with each other, the pressing portion is located at a central position of one side of the flange portion, the flange portion is connected to the valve body, and the pressing portion extends into the packing groove and presses against the sealing member.

8. The knife valve of claim 1, wherein the junction of the gate passage and the packing pocket has an abutment shoulder against which the junction of the first and second segments of the seal support abuts.

9. The knife gate valve of claim 1, wherein the holder comprises a plate and a plurality of legs, the driving source is disposed on one side of the plate, one end of the legs is disposed on the other side of the plate, and the valve body is disposed on the other end of the legs.

10. The knife valve of claim 9, wherein the drive source comprises a pneumatic cylinder and a drive rod, one end of the drive rod being telescopically displaceable within the pneumatic cylinder and the other end being connected to the knife plate.

11. The knife valve of claim 10, wherein the plate has a through hole at a central location, and the driving rod passes through the through hole and is linearly displaceable within a range surrounded by the plurality of legs.