CN108518495B

CN108518495B - Control system for double-valve-plate gate valve of pneumatic conveying system and use method

Info

Publication number: CN108518495B
Application number: CN201810369831.4A
Authority: CN
Inventors: 王甲亮
Original assignee: Zhejiang Hailui Valve Co Ltd
Current assignee: Zhejiang Hailui Valve Co ltd
Priority date: 2018-04-24
Filing date: 2018-04-24
Publication date: 2020-05-05
Anticipated expiration: 2038-04-24
Also published as: CN108518495A

Abstract

The invention provides a control system and a use method for a double-valve-plate gate valve of a pneumatic conveying system, and relates to the technical field of double-valve-plate gate valves. Through setting up the pivot, the inboard half arc screw thread of twist grip and valve plate, the pivot includes pivot first screw thread section, pivot changeover portion and pivot second screw thread section, half arc screw thread from last to down through setting up three kinds of screw threads respectively with pivot first screw thread section, pivot changeover portion and pivot second screw thread section are connected, can avoid the sealed face of gate valve plate when closing to lead to the gate valve to close not tight problem owing to excessive friction, and just can accomplish the operation through rotatory handle, and the operation is simple.

Description

Control system for double-valve-plate gate valve of pneumatic conveying system and use method

Technical Field

The invention relates to the technical field of double-gate-plate gate valves, in particular to a control system for a double-gate-plate gate valve of a pneumatic conveying system and a using method of the control system.

Background

The pneumatic gate valve is characterized in that a gate plate is driven by an air cylinder to open or close the valve, a T-shaped gate plate seat adopts a special structure, the gate plate is driven to do circular rotation along the center while moving linearly, a certain self-grinding and polishing cleaning effect is achieved on a sealing surface of a valve seat, so that the circumference of the sealing gate plate can uniformly bear the impact and abrasion of materials, the local damage or abrasion of the gate plate in the long-term operation process is avoided, and the service life of the gate plate is greatly prolonged. Meanwhile, the double gate plates can ensure that two surfaces are sealed and do not leak under the static pressure of the springs, and when one surface of each gate plate has pressure, the other surface can be in closer contact with the sealing seat under the action of the springs so as to achieve the sealing effect.

The main problems of the existing valve in use are the erosion damage of the seal and the flashboard, the valve is suitable for working in a fully open or fully closed state, the erosion and the abrasion are easily caused between the seal surfaces, the seal surface of the flashboard is not tight due to the erosion of a medium, the maintenance is difficult, and the problems are difficult to solve by the prior art.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a control system and a use method for a double-valve-plate gate valve of a pneumatic conveying system, which solve the problems that the seal and the gate plate are damaged by scouring in the use process of the valve at present, the valve is suitable for working in a fully-opened or fully-closed state, the scouring and the abrasion are easily caused between the seal surfaces, the seal surface of the gate plate is not tight due to the scouring of a medium, the maintenance is difficult, and the problems are difficult to solve by the prior art.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a control system for a double-valve-plate gate valve of a pneumatic conveying system comprises a gate valve body, a pneumatic assembly and a controller, wherein the input end of the pneumatic assembly is connected with the output end of the controller through a signal transmission line, the pneumatic assembly is arranged on the inner wall of the gate valve body, a pneumatic assembly fixing shell is arranged at the top end of the gate valve body, a plurality of pneumatic assemblies are arranged inside the pneumatic assembly fixing shell, L-shaped fixing rods are arranged at the bottom ends of the pneumatic assemblies, valve rods are arranged inside the L-shaped fixing rods, a plurality of valve plates are arranged at the bottom end of each valve rod, hard springs are arranged inside the valve plates, protruding blocks are arranged at the bottom ends of the valve plates, an infrared emitter is arranged inside the protruding blocks, semi-arc-shaped threads are arranged inside the valve plates, and a shaft seal is arranged at the bottom end of the pneumatic assembly fixing shell, the bottom of bearing seal is provided with the valve plate activity chamber, the inside of valve rod is provided with the screw thread layer, the middle part of valve rod is provided with the pivot, the pivot includes pivot first screw thread section, pivot changeover portion and pivot second screw thread section, the second screw thread section with the screw thread layer passes through threaded connection, the top of pivot is provided with the twist grip, the pivot first screw thread section passes through threaded connection with a plurality of the valve plate, the bottom of gate valve body is provided with the base, the surface of base is provided with a plurality of slots, and the surface of a plurality of slots is provided with infrared receiver.

Preferably, the height ratio of pivot the height of pneumatic component set casing is at least 10cm big, the pneumatic component set casing with the gate valve body passes through the electric welding and is connected, the pneumatic component set casing is made by high carbon steel.

Preferably, the diameter of the movable cavity of the valve plate is equal to the sum of the diameter of the second threaded section of the rotating shaft and the minimum width of the valve plates, and the number of the valve plates is two.

Preferably, the hard spring is connected with the valve plates through fasteners.

Preferably, the output end of the infrared receiver is connected with the input end of the controller through an analog-to-digital converter.

Preferably, the transition section of the rotating shaft is in a circular truncated cone shape.

Preferably, the diameter of the first thread section of the rotating shaft is at least 0.5cm smaller than that of the second thread section of the rotating shaft.

Preferably, the thread layer with the valve rod is connected through smelting, half arc-shaped screw thread from last to down through setting up three kinds of screw threads respectively with pivot first screw thread section, pivot changeover portion and pivot second screw thread section is connected.

(III) advantageous effects

The invention provides a control system for a double-valve-plate gate valve of a pneumatic conveying system and a using method. The method has the following beneficial effects:

1. this a control system for pneumatic conveying system bivalve board gate valve, through the pivot, the inboard half arc screw thread of twist grip and valve plate, the pivot includes the first screw thread section of pivot, pivot changeover portion and pivot second screw thread section, half arc screw thread from last to down through setting up three kinds of screw threads respectively with the first screw thread section of pivot, pivot changeover portion and pivot second screw thread section are connected, can avoid the sealed face of gate valve plate when closing to lead to the gate valve to close not tight problem because excessive friction, and just can accomplish the operation through rotatory handle, the operation is simple.

2. This a control system for pneumatic conveying system bivalve board floodgate valve, through lug, slot, infra-red transmitter, infrared receiver and controller, infrared receiver's output passes through analog to digital converter and is connected with the input of controller, can audio-visually see out the distance between valve plate and the base upper surface, has improved the security that the gate valve closed, has also avoided pneumatic component to last work after the valve plate closes completely to practice thrift the electric energy.

3. This a control system for pneumatic conveying system bivalve board gate valve, through the stereoplasm spring, the stereoplasm spring passes through the fastener and is connected with a plurality of valve plates, the size of valve plate activity chamber diameter equals the size of pivot second screw thread section diameter and the minimum width size sum of a plurality of valve plates, when making pivot first screw thread section and half arc screw thread pass through threaded connection, two valve plates pass through the stereoplasm spring and shrink to the centre, thereby make the sealed face of both sides all not with the inner wall looks mutual friction of gate valve body, thereby the leakproofness of gate valve has been increased, the life of gate valve has also been prolonged.

4. According to the control system for the double-valve-plate gate valve of the pneumatic conveying system, the height of the rotating shaft is at least 10cm greater than that of the pneumatic component fixing shell, so that the rotating handle is still positioned at the upper part of the pneumatic component fixing shell after the rotating shaft rotates for a plurality of circles; the pneumatic component fixing shell is connected with the gate valve body through electric welding, so that the firmness of the pneumatic component fixing shell is improved; the pneumatic component fixing shell is made of high-carbon steel, and has good physical property, good wear resistance and strong corrosion resistance.

5. This a control system for pneumatic conveying system bivalve board floodgate valve is the round platform form through the pivot changeover portion, can have the effect of a buffering when can be so that the rotation of pivot first thread section and pivot second thread section gets into the inboard half arc screw thread of valve plate, not only saves the power that rotates the twist grip and consume, improves the rotatory stability of pivot moreover, has improved pivot pivoted stability then.

Drawings

FIG. 1 is a schematic view of the overall structure of a gate valve body according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a schematic diagram of a bump structure according to the present invention;

FIG. 4 is a schematic view of the overall structure of the actuating assembly of the present invention;

FIG. 5 is a schematic view of a specific structure of the spindle of the present invention;

FIG. 6 is a flow chart of the controller of the present invention;

FIG. 7 is a power transmission diagram of the rotating shaft of the present invention.

In the figure: 1. a gate valve body; 2. a valve plate movable chamber; 3. a pneumatic component fixing shell; 4. a valve stem; 5. a valve plate; 6. a base; 7. a hard spring; 8. a rotating shaft; 9. rotating the handle; 10. a pneumatic assembly; 11. an L-shaped fixing rod; 12. shaft sealing; 13. a threaded layer; 14. a half-arc thread; 15. a first threaded section of the shaft; 16. a transition section of the rotating shaft; 17. a second thread section of the rotating shaft; 18. a controller; 19. a bump; 20. a slot; 21. an infrared emitter; 22. an infrared receiver.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

The embodiment of the invention provides a control system for a double-valve-plate gate valve of a pneumatic conveying system, which comprises a gate valve body 1, a pneumatic assembly 10 and a controller 18, wherein the input end of the pneumatic assembly 10 is connected with the output end of the controller 18 through a signal transmission line, the pneumatic assembly 10 is arranged on the inner wall of the gate valve body 1, the top end of the gate valve body 1 is provided with a pneumatic assembly fixing shell 3, a plurality of pneumatic assemblies 10 are arranged inside the pneumatic assembly fixing shell 3, the bottom ends of the plurality of pneumatic assemblies 10 are respectively provided with an L-shaped fixing rod 11, the inner sides of the plurality of L-shaped fixing rods 11 are respectively provided with a valve rod 4, the bottom end of the valve rod 4 is provided with a plurality of valve plates 5, the inner sides of the plurality of valve plates 5 are respectively provided with a hard spring 7, the bottom ends of the plurality of valve plates 5 are respectively provided with a lug 19, the bottom of pneumatic component set casing 3 is provided with bearing seal 12, the bottom of bearing seal 12 is provided with valve plate activity chamber 2, the inside of valve rod 4 is provided with screw thread layer 13, the middle part of valve rod 4 is provided with pivot 8, pivot 8 includes pivot first screw thread section 15, pivot changeover portion 16 and pivot second screw thread section 17, second screw thread section 17 passes through threaded connection with screw thread layer 13, the top of pivot 8 is provided with twist grip 9, pivot first screw thread section 15 passes through threaded connection with a plurality of valve plates 5, the bottom of gate valve body 1 is provided with base 6, the surface of base 6 is provided with a plurality of slots 20, the surface of a plurality of slots 20 is provided with infrared receiver 22.

To sum up, this a control system for pneumatic conveying system bivalve board gate valve, through setting up pivot 8, twist grip 9 and the inboard half arc screw thread 14 of valve plate 5, pivot 8 includes pivot first screw thread section 15, pivot changeover portion 16 and pivot second screw thread section 17, half arc screw thread 14 from last to down through setting up three kinds of screw threads respectively with pivot first screw thread section 15, pivot changeover portion 16 and pivot second screw thread section 17 and be connected, can avoid the sealed face of valve plate 5 when closing to lead to the gate valve to close not closely problem because excessive friction, and just can accomplish the operation through twist grip 9, easy operation.

Secondly, through setting up lug 19, slot 20, infrared emitter 21, infrared receiver 22 and controller 18, the output of infrared receiver 22 passes through analog to digital converter and is connected with the input of controller 18, can be audio-visual sees the distance between valve plate 5 and the 6 upper surfaces of base, has improved the security that the gate valve was closed, has also avoided pneumatic component 10 to last work after valve plate 5 closes completely to practice thrift the electric energy.

And, through setting up hard spring 7, hard spring 7 passes through the fastener and is connected with a plurality of valve plates 5, the size of 2 diameters in valve plate activity chamber equals the size of pivot second screw thread section 17 diameter and the minimum width size sum of a plurality of valve plates 5, when making pivot first screw thread section 15 and half arc screw thread 14 pass through threaded connection, two valve plates 5 pass through hard spring 7 and shrink to the centre, thereby make the sealed face of both sides all not with the inner wall looks mutual friction of gate valve body 1, thereby the leakproofness of gate valve has been increased, the life of gate valve has also been prolonged.

Moreover, the height of the rotating shaft 8 is at least 10cm greater than that of the pneumatic component fixing shell 3, so that the rotating handle 9 is still positioned at the upper part of the pneumatic component fixing shell 3 after the rotating shaft 8 rotates for a plurality of circles; the pneumatic component fixing shell 3 is connected with the gate valve body 1 through electric welding, so that the firmness of the pneumatic component fixing shell 3 is improved; the pneumatic component fixing shell 3 is made of high-carbon steel, and has good physical property, good wear resistance and strong corrosion resistance.

And, through the pivot changeover portion 16 is round platform form, can make pivot first screw thread section 15 and pivot second screw thread section 17 have a cushioning effect when rotatory entering half arc screw thread 14 of valve plate 5 inboard, not only save the power that rotates twist grip 9 and consume, improve the rotatory stability of pivot 8 moreover, then improved pivot 8 pivoted stability.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A control system for a dual-valve-plate gate valve of a pneumatic conveying system, which comprises a gate valve body (1), a pneumatic assembly (10) and a controller (18), wherein the input end of the pneumatic assembly (10) is connected with the output end of the controller (18) through a signal transmission line, the pneumatic assembly (10) is arranged on the inner wall of the gate valve body (1), and the control system is characterized in that: the gate valve comprises a gate valve body (1), and is characterized in that a pneumatic component fixing shell (3) is arranged at the top end of the gate valve body (1), a plurality of pneumatic components (10) are arranged inside the pneumatic component fixing shell (3), L-shaped fixing rods (11) are arranged at the bottom ends of the pneumatic components (10), a valve rod (4) is arranged on the inner sides of the L-shaped fixing rods (11), a plurality of valve plates (5) are arranged at the bottom end of the valve rod (4), hard springs (7) are arranged on the inner sides of the valve plates (5), a plurality of convex blocks (19) are arranged at the bottom ends of the valve plates (5), an infrared emitter (21) is arranged inside the convex blocks (19), semi-arc threads (14) are arranged on the inner sides of the valve plates (5), a shaft seal (12) is arranged at the bottom end of the pneumatic component fixing shell (3), and a, a threaded layer (13) is arranged inside the valve rod (4), a rotating shaft (8) is arranged in the middle of the valve rod (4), the rotating shaft (8) comprises a rotating shaft first thread section (15), a rotating shaft transition section (16) and a rotating shaft second thread section (17), the second thread section (17) is in threaded connection with the threaded layer (13), a rotating handle (9) is arranged at the top end of the rotating shaft (8), the rotating shaft first thread section (15) is in threaded connection with the valve plates (5), a base (6) is arranged at the bottom end of the gate valve body (1), a plurality of inserting grooves (20) are formed in the surface of the base (6), and an infrared receiver (22) is arranged on the surface of the inserting grooves (20); the height of the rotating shaft (8) is at least 10cm greater than that of the pneumatic component fixing shell (3), the pneumatic component fixing shell (3) is connected with the gate valve body (1) through electric welding, and the pneumatic component fixing shell (3) is made of high-carbon steel; the diameter of the valve plate movable cavity (2) is equal to the sum of the diameter of the second threaded section (17) of the rotating shaft and the minimum width of the plurality of valve plates (5), and the number of the plurality of valve plates (5) is two.

2. The control system for a dual-valve-plate gate valve of a pneumatic conveying system according to claim 1, characterized in that: the hard spring (7) is connected with the valve plates (5) through fasteners.

3. The control system for a dual-valve-plate gate valve of a pneumatic conveying system according to claim 1, characterized in that: the output end of the infrared receiver (22) is connected with the input end of the controller (18) through an analog-to-digital converter.

4. The control system for a dual-valve-plate gate valve of a pneumatic conveying system according to claim 1, characterized in that: the rotating shaft transition section (16) is in a circular truncated cone shape.

5. The control system for a dual-valve-plate gate valve of a pneumatic conveying system according to claim 1, characterized in that: the diameter of the first rotating shaft thread section (15) is at least 0.5cm smaller than that of the second rotating shaft thread section (17).

6. The control system for a dual-valve-plate gate valve of a pneumatic conveying system according to claim 1, characterized in that: half arc screw thread (14) from last to down through set up three kinds of screw threads respectively with pivot first screw thread section (15), pivot changeover portion (16) and pivot second screw thread section (17) are connected.

7. The use of a control system for a dual-plate gate valve of a pneumatic conveying system according to claim 1, characterized in that: during the use, the valve body defaults to be in a closed state, the gate valve body (1) is opened, the rotating handle (9) is rotated anticlockwise through anticlockwise rotation, the first screw thread section (15) of the rotating shaft is driven, the transition section (16) of the rotating shaft and the second screw thread section (17) of the rotating shaft rotate anticlockwise, then the first screw thread section (15) and the transition section (16) of the rotating shaft rotate out from the semi-arc threads (14) among the flashboards (5) one by one, the width among the flashboards (5) is reduced along with the contraction of the hard spring (7), then the pneumatic component (10) is controlled through the controller (18) to drive the valve rod (4) to ascend, then the valve plate (5) is driven to displace upwards in the inner part of the valve plate movable cavity (2), and therefore; when the gate valve needs to be closed, the pneumatic assembly (10) is controlled by the controller (18) to drive the valve rod (4) to fall, the valve plate (5) is driven to fall, the infrared emitter (21) inside the convex block (19) at the bottom end of the valve plate (5) continuously emits signals to the infrared receiver (22) of the surface slot (20) of the base (6), after the infrared receiver (22) receives the signals, the signals are transmitted to the controller (18) through the analog-to-digital converter, the controller (18) controls the working current of the pneumatic assembly (10) according to the difference of the distance between the infrared emitter (21) and the infrared receiver (22), the current of the pneumatic assembly (10) is larger when the distance is farther, the current of the pneumatic assembly (10) is smaller when the distance is closer, the rotating handle (9) is rotated clockwise when the valve plate (5) is completely closed, and the first thread section (15) of the rotating shaft, The rotating shaft transition section (16) and the rotating shaft second thread section (17) are connected with the threads inside the semi-arc threads (14) one by one, and the hard springs (7) among the valve plates (5) are in a stretching state to complete the action of closing the gate valve.