Pneumatic gate valve

Abstract

The utility model provides a pneumatic gate valve. The pneumatic gate valve comprises a valve body, a gate, a driving assembly, a transmission assembly and two bearing assemblies. One side of the valve body is provided with a diversion port; an insertion plate is inserted into the valve body, and the insertion plate can block the flow guide opening; the driving assembly is arranged at one end of the valve body and provided with a driving end. One end of the transmission assembly is connected with the driving end, and the other end is connected with the insertion plate; the two bearing assemblies are oppositely distributed on the two sides of the flow guide opening in the width direction of the valve body, and each bearing assembly is in rolling fit with the two side plate faces of the inserting plate. According to the pneumatic gate valve provided by the utility model, the two bearing assemblies are respectively in rolling fit with the two plate surfaces of the gate to limit the gate in the height direction of the valve body, so that the moving stability of the gate is improved, the friction force of the gate in the moving process is reduced, the loss is reduced, and the service life of the gate is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, concretely relates to a pneumatic gate valve. BACKGROUND

[0002] The pneumatic gate valve is a commonly used pneumatic actuator, and is widely applied to the fields such as material conveying. The gate of the gate valve is always in close contact with the valve seat, a circular port with a certain diameter is formed on the gate, the circular port on the gate is completely separated from the diameter or matched with the diameter by opening and closing the gate, the sealing valve seat is designed as a movable structure, has the functions of wear prevention and automatic compensation, and thus has a longer service life. The valve seat and the gate are always in close contact during the closing and opening processes, so that the valve opening and closing force is stable, and the valve has the characteristics of cutting off medium.

[0003] The existing gate valve is made of steel material, and after long-term use or long-term impact of materials, the gate and the valve seat are worn due to mutual friction, the close fit degree is reduced, and the sealing performance is affected; due to the impact of materials, the valve sealing element is easily worn, the service life is shortened, and the maintenance cost is increased. UTILITY MODEL CONTENTS

[0004] The utility model embodiment provides a pneumatic gate valve, aims at solving the technical problem of the existing technology that the gate valve is easily worn after long-term use and affects the service life.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0006] Provided is a pneumatic gate valve, comprising:

[0007] The valve body is a cuboid component, and a flow guide port is formed in one side surface of the valve body;

[0008] The gate is slidably inserted into the valve body along the length direction of the valve body, and the gate can block the flow guide port;

[0009] The drive assembly is arranged at one end of the valve body, and the drive assembly has a drive end extending into the valve body and extending and retracting along the length direction of the valve body;

[0010] The transmission assembly is connected to one end of the drive end and connected to one side of the gate close to the drive end; and

[0011] The two bearing assemblies are oppositely arranged on both sides of the flow guide port along the width direction of the valve body, and each bearing assembly is in rolling contact with the two side surfaces of the gate.

[0012] In a possible implementation, the bearing assembly comprises a plurality of bearing groups arranged along the length direction of the valve body, each of the bearing groups comprises two oppositely arranged bearing members, and the two bearing members in the same bearing group are respectively in rolling contact with the two side plate surfaces of the insert plate.

[0013] In a possible implementation, the bearing member comprises a rotating bearing, a bolt and a nut, one end of the bolt penetrates through the valve body and is screwed with the nut, the other end of the bolt is fixedly connected with the inner ring of the rotating bearing, the rotating axis of the rotating bearing is parallel to the width direction of the valve body, and the outer ring surface of the rotating bearing is in rolling contact with the plate surface of the insert plate.

[0014] In a possible implementation, a guide plate is arranged at the flow guide opening, and the guide plate is gradually inclined towards the center axis of the flow guide opening from top to bottom along the height direction of the valve body.

[0015] In a possible implementation, the valve body and the guide plate are made of the same material.

[0016] In a possible implementation, the driving assembly comprises a pneumatic actuator, and a piston rod of the pneumatic actuator is connected to the end of the transmission assembly away from the insert plate.

[0017] In a possible implementation, the transmission assembly comprises:

[0018] a Y-shaped joint connected to the piston rod of the pneumatic actuator, and a fixing groove for inserting the insert plate is formed between the two arms of the Y-shaped joint;

[0019] a gasket arranged between the arm of the Y-shaped joint and the plate surface of the insert plate; and

[0020] a pin shaft penetrating through the two arms of the Y-shaped joint, the gasket and the insert plate along the height direction of the valve body.

[0021] In a possible implementation, the valve body further comprises a sealing assembly, and the sealing assembly comprises:

[0022] two pressing plates arranged in the valve body along the height direction of the valve body, and an insertion channel is formed between the two pressing plates, and the insert plate is slidingly arranged in the insertion channel; and

[0023] a sealing ring arranged on the inner wall of the insertion channel and tightly abutting against the insert plate.

[0024] In a possible implementation, one end of each of the two pressing plates towards the insertion channel is provided with a receiving groove, and the sealing ring is arranged in the two receiving grooves;

[0025] The sealing assembly further comprises a fastener which passes through the pressing plate and is used for fixing the sealing ring.

[0026] In a possible implementation, the valve body extends outward along the width direction of the valve body, and an extension plate is arranged on the outwardly extended portion of the valve body.

[0027] Compared with the prior art, the pneumatic plug valve provided by the utility model drives the transmission assembly to move through the driving end of the driving assembly, drives the plug to move along the length direction of the valve body, and blocks the flow guide opening of the valve body until the plug, in the whole moving process, the bearing assembly is in rolling fit with the two plate surfaces of the plug respectively to limit the plug in the height direction of the valve body, improve the moving stability of the plug, reduce the friction force of the plug in the moving process, reduce the loss, prolong the service life of the plug, the bearing assembly can also support the plug, ensure the sealing state of the plug and the flow guide opening in the moving process, ensure that the material does not leak, and improve the use effect of the pneumatic plug valve. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0029] Figure 1 The front view structural schematic of the pneumatic plug valve provided by an embodiment of the utility model Figure 1 ;

[0030] Figure 2 The front view structural schematic of the pneumatic plug valve provided by an embodiment of the utility model Figure 2 ;

[0031] Figure 3 The front view structural schematic of the pneumatic plug valve provided by an embodiment of the utility model Figure 1 ;

[0032] Figure 4 The front view structural schematic of the pneumatic plug valve provided by an embodiment of the utility model Figure 2 ;

[0033] Figure 5 The side view structural schematic of the pneumatic plug valve provided by an embodiment of the utility model Figure 1 ;

[0034] Figure 6 The structure schematic of the bearing part used in the utility model Figure 1 ;

[0035] Figure 7 The structure schematic of the bearing part used in the utility model Figure 3Structure diagram of A-A perspective view adopted in the application;

[0036] Figure 8 For Figure 4 Structure diagram of B-B perspective view adopted in the application;

[0037] Figure 9 For Figure 1 Structure diagram of deflector adopted in the application;

[0038] Figure 10 For Figure 9 Structure diagram of C-C perspective view adopted in the application.

[0039] BRIEF DESCRIPTION OF DRAWINGS

[0040] 1. valve body; 11. deflector; 111. mounting plate; 112. inclined plate; 12. extension plate; 121. connecting hole;

[0041] 2. plug plate;

[0042] 3. drive assembly; 31. pneumatic actuator; 311. piston rod;

[0043] 4. transmission assembly; 41. Y joint; 42. gasket; 43. pin shaft;

[0044] 5. bearing assembly; 51. bearing; 511. rotary bearing; 512. bolt; 513. nut;

[0045] 6. sealing assembly; 61. pressing plate; 62. sealing ring; 63. fastener. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects of the application to be solved more clear and obvious, the application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the application and do not limit the application.

[0047] The technical solutions in the embodiments of the application will be described clearly and completely below in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the application and its application or use. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0048] It should be noted that the terms "length", "width", "height", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. The orientation terms "inner" and "outer" refer to the inner and outer of the contour of each component itself.

[0049] It should also be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing", "setting" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] For the convenience of description, spatial relative terms such as "above", "upper", "upper surface", "upper", etc. can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "above" other devices or structures will be positioned "below" or "below" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways, and the spatial relative description used herein is interpreted accordingly.

[0051] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In addition, the meaning of "multiple", "several" is two or more, unless otherwise explicitly specified and limited.

[0052] Please refer to Figures 1 to 10The pneumatic plug valve provided by the utility model is described. The pneumatic plug valve comprises a valve body 1, a plug 2, a driving assembly 3, a transmission assembly 4 and two bearing assemblies 5. The valve body 1 is a cuboid component, and a flow guide opening is formed in one side of the valve body 1; the plug 2 is slidably arranged in the valve body 1 along the length direction of the valve body 1, and the plug 2 can block the flow guide opening; the driving assembly 3 is arranged at one end of the valve body 1, and the driving assembly 3 has a driving end which extends into the valve body 1 and is retractable along the length direction of the valve body 1; the transmission assembly 4 is connected with the driving end at one end and connected with one side of the plug 2 close to the driving end at the other end; the two bearing assemblies 5 are oppositely arranged at the two sides of the flow guide opening along the width direction of the valve body 1, and each bearing assembly 5 is in rolling fit with the two side plate surfaces of the plug 2.

[0053] In the embodiment, the valve body 1 has a box-shaped structure, one side of the valve body 1 is open, a cover plate is arranged at the opening, the cover plate is provided with the flow guide opening, and an inlet and outlet interface is further arranged on the valve body 1, which is prior art and will not be described in detail.

[0054] It should be noted that the height direction, the length direction and the width direction of the valve body 1 are based on the cuboid structure of the valve body 1, and when the valve body 1 is horizontally placed, the height direction is the vertical direction, and the length direction and the width direction are in the horizontal plane and perpendicular to each other.

[0055] It should be noted that the solid arrow in Figure 2 indicates the length direction of the valve body 1, and the dashed arrow indicates the width direction of the valve body 1, Figure 3 the solid arrow in

[0056] Compared with the prior art, the pneumatic plug valve provided by the embodiment can drive the transmission assembly 4 to move through the driving end of the driving assembly 3, drive the plug 2 to move along the length direction of the valve body 1 through the transmission assembly 4, block the flow guide opening of the valve body 1 until the plug 2, limit the plug 2 in the height direction of the valve body 1 through the rolling fit between the two bearing assemblies 5 and the two plate surfaces of the plug 2 in the whole moving process, improve the moving stability of the plug 2, reduce the friction of the plug 2 in the moving process, reduce the loss, prolong the service life of the plug 2, support the plug 2 through the bearing assembly 5, ensure the sealing state of the plug 2 and the flow guide opening in the moving process, ensure that the material does not leak, and improve the use effect of the pneumatic plug valve.

[0057] In some embodiments, reference can be made to Figure 1 and Figure 2The bearing assembly 5 comprises a plurality of bearing groups arranged along the length direction of the valve body 1, each bearing group comprising two bearing pieces 51 arranged oppositely, and the two bearing pieces 51 in the same bearing group are respectively in rolling contact with the two side plate surfaces of the plug plate 2. The arrangement of the plurality of bearing groups enables the plug plate 2 to be in rolling contact with the plurality of bearing pieces 51, thereby improving the supporting effect on the plug plate 2 and enabling the plug plate 2 to move stably. The bearing piece 51 and the plug plate 2 are in rolling contact, and the friction is small, thereby reducing the abrasion of the plug plate 2 during the movement of the plug plate 2 and prolonging the service life of the plug plate 2.

[0058] In some embodiments, referring to Figure 6 The bearing piece 51 comprises a rotating bearing 511, a bolt 512 and a nut 513. One end of the bolt 512 penetrates through the valve body 1 and is screwed with the nut 513. The other end of the bolt 512 is fixedly connected with the inner ring of the rotating bearing 511. The rotating axis of the rotating bearing 511 is parallel to the width direction of the valve body 1. The outer ring of the rotating bearing 511 is in rolling contact with the plate surface of the plug plate 2. The bolt 512 is fixed on the side wall of the valve body 1. The nut 513 and the bolt 512 are screwed to fix the bolt 512. The inner ring surface of the rotating bearing 511 is connected with the bolt 512 to fix the position of the rotating bearing 511, thereby avoiding the change of the position of the rotating surface during the rolling contact with the plug plate 2, improving the supporting effect on the plug plate 2 and ensuring the stable movement of the plug plate 2.

[0059] In specific implementation, the rotating bearing 511 is a deep groove ball bearing.

[0060] It should be noted that the rotating axes of the two rotating bearings 511 in the same bearing assembly 5 are parallel to each other and have opposite rotation directions.

[0061] In some embodiments, referring to Figure 1 , Figure 9 and Figure 10 A guide plate 11 is arranged at the flow guide opening. The guide plate 11 is inclined from top to bottom along the height direction of the valve body 1 to the direction close to the central axis of the flow guide opening. The inward inclination of the guide plate 11 can guide the flow of the fluid, reduce the impact force of the fluid on the plug plate 2 and reduce the abrasion of the plug plate 2.

[0062] In specific implementation, referring to Figure 9 and Figure 10 The guide plate 11 comprises a mounting plate 111 and four inclined plates 112. The mounting plate 111 is fixedly connected with the valve body 1. The mounting plate 111 cooperates with the cover plate to seal the opening of the valve body 1. A rectangular opening is formed in the middle of the mounting plate 111. The four inclined plates 112 are respectively arranged at the four sides of the opening, and the four inclined plates 112 are inclined from top to bottom along the height direction of the valve body 1 to the direction close to the axis of the opening. The bottom ends of the four inclined plates 112 enclose the flow guide opening, and the plug plate 2 can seal the flow guide opening.

[0063] In some embodiments, the valve body 1 and the flow guide plate 11 are made of the same material. The valve body 1 and the flow guide plate 11 are made of the same material, which prolongs the service life of the flow guide plate 11 and is easy to process, thereby saving costs.

[0064] In specific implementation, the valve body 1 and the flow guide plate 11 are made of corrosion-resistant and high-strength materials, which can be stainless steel. The plug 2 is made of wear-resistant and corrosion-resistant materials.

[0065] In some embodiments, referring to Figures 1 to 4 , the drive assembly 3 includes a pneumatic actuator 31, and a piston rod 311 of the pneumatic actuator 31 is connected to an end of the transmission assembly 4 away from the plug 2. The pneumatic actuator 31 receives compressed air and drives the piston rod 311 to move, and the pneumatic actuator 31 has a fast response speed, thereby improving control efficiency.

[0066] In some embodiments, referring to Figure 3 , the transmission assembly 4 includes a Y-shaped joint 41, a gasket 42, and a pin shaft 43. One end of the Y-shaped joint 41 is connected to the piston rod 311 of the pneumatic actuator 31, and two arms of the Y-shaped joint 41 form a fixed groove for inserting the plug 2; the gasket 42 is arranged between the arms of the Y-shaped joint 41 and the plate surface of the plug 2; and the pin shaft 43 penetrates the two arms of the Y-shaped joint 41, the gasket 42, and the plug 2 in the height direction of the valve body 1. The transmission assembly 4 provided in the embodiment has a simple structure, and the two plate surfaces of the plug 2 are in contact with the fixed groove of the Y-shaped joint 41, and the pin shaft 43 penetrates the Y-shaped joint 41 and the plug at the same time, thereby achieving stable connection and large contact area. The gasket 42 can increase the stress area of the plug 2, avoid local damage of the plug 2, and prolong the service life.

[0067] In some embodiments, referring to Figure 1 and Figure 8 , the valve body 1 further comprises a sealing assembly 6, and the sealing assembly 6 includes two pressing plates 61 and a sealing ring 62. The two pressing plates 61 are arranged in the valve body 1 in the height direction of the valve body 1, and a plug-in channel is formed between the two pressing plates 61, and the plug 2 is slidingly arranged in the plug-in channel; and the sealing ring 62 is arranged on the inner wall of the plug-in channel and tightly abuts against the plug 2. The two pressing plates 61 provide the plug-in channel, and the sealing ring 62 is arranged at the plug-in channel and slidingly seals the plug 2, so that the plug 2 is in a sealed state before plugging the flow guide hole, and the area of the valve body 1 except the area of the flow guide hole is in a sealed state, thereby improving the sealing performance of the valve body 1 and avoiding fluid leakage.

[0068] In some embodiments, referring to Figure 3 and Figure 8The two pressing plates 61 are provided with accommodating grooves at one end of the insertion channel, and the sealing ring 62 is arranged in the two accommodating grooves; the sealing assembly 6 further comprises a fastener 63 which penetrates the pressing plate 61 and is used for fixing the sealing ring 62. The accommodating grooves can limit the sealing ring 62, ensure the stable fixation of the sealing ring 62, and the fastener 63 is a hexagonal bolt with a nut. After the fastener 63 penetrates the pressing plate 61, the nut and the hexagonal bolt are matched to clamp and fix the sealing ring 62, so that the sealing ring 62 is always in sealing sliding with the insertion plate 2.

[0069] In some embodiments, referring to Figure 8 The valve body 1 is provided with an extension plate 12 extending outward along the width direction of the valve body 1, and the extension plate 12 is provided with a connecting hole 121 for connecting the flow guide plate 11 and the extension plate 12. The connecting hole 121 facilitates the connection of the cover plate and the mounting plate 111 with the valve body 1, and also facilitates the fixation of the flow guide plate 11, improves the sealing effect in the valve body 1, and reduces the installation difficulty.

[0070] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pneumatic plug valve characterized by, include: The valve body is a rectangular parallelepiped component, and a flow guide port is provided on one side of the valve body; A slide plate is slidably inserted into the valve body along the length of the valve body, and the slide plate can block the flow port; A drive assembly is disposed at one end of the valve body, the drive assembly having a drive end that extends into the valve body and extends and retracts along the length direction of the valve body; A transmission assembly, one end of which is connected to the drive end, and the other end of which is connected to the side of the insert plate near the drive end; and Two bearing assemblies are distributed opposite each other on both sides of the flow guide port along the width direction of the valve body, and each bearing assembly is in rolling engagement with the two side plates of the insert plate.

2. The pneumatic plug valve as set forth in claim 1, wherein, The bearing assembly includes multiple bearing groups arranged at intervals along the length of the valve body. Each bearing group includes two bearing components arranged opposite to each other. The two bearing components in the same bearing group are respectively in rolling engagement with the two side plates of the insert plate.

3. The pneumatic plug valve as set forth in claim 2, wherein, The bearing component includes a rotating bearing, a bolt, and a nut. One end of the bolt passes through the valve body and is screwed to the nut. The other end of the bolt is fixedly connected to the inner ring of the rotating bearing. The rotation axis of the rotating bearing is parallel to the width direction of the valve body. The outer ring surface of the rotating bearing is in rolling contact with the surface of the insert plate.

4. The pneumatic plug valve as set forth in claim 1, wherein, A guide plate is provided at the flow inlet, and the guide plate gradually tilts from top to bottom towards the central axis of the flow inlet along the height direction of the valve body.

5. The pneumatic plug valve as set forth in claim 1, wherein, The valve body and the guide plate are made of the same material.

6. The pneumatic plug valve as set forth in claim 1, wherein, The drive assembly includes a pneumatic actuator, the piston rod of which is connected to the end of the transmission assembly away from the insert plate.

7. The pneumatic plug valve as set forth in claim 6, wherein The transmission assembly includes: A Y-type connector, one end of which is connected to the piston rod of the pneumatic actuator, and a fixing groove is formed between the two arms of the Y-type connector for insertion into the insert plate; A gasket is disposed between the support arm of the Y-type connector and the plate surface of the insert; and The pin passes sequentially through the two arms of the Y-shaped connector, the gasket, and the insert plate along the height direction of the valve body.

8. The pneumatic plug valve as set forth in claim 1, wherein, The valve body is also provided with a sealing assembly, which includes: Two pressure plates are spaced apart within the valve body along its height, forming an insertion channel between them. The insertion plate is slidably inserted into the insertion channel. A sealing ring is provided on the inner wall of the insertion channel and fits tightly against the insertion plate.

9. The pneumatic plug valve as set forth in claim 8, wherein, Each of the two pressure plates has a receiving groove at one end facing the insertion channel, and the sealing ring is disposed in the two receiving grooves; The sealing assembly also includes fasteners that pass through the pressure plate and are used to secure the sealing ring.

10. The pneumatic plug valve as set forth in claim 4, wherein, The valve body has an extension plate extending outward along its width direction, and the extension plate has a connection hole to connect the guide plate and the extension plate.

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