KR101467890B1 - A knife gate valve having debris leak-barrier function using ejector - Google Patents

A knife gate valve having debris leak-barrier function using ejector Download PDF

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Publication number
KR101467890B1
KR101467890B1 KR20140117720A KR20140117720A KR101467890B1 KR 101467890 B1 KR101467890 B1 KR 101467890B1 KR 20140117720 A KR20140117720 A KR 20140117720A KR 20140117720 A KR20140117720 A KR 20140117720A KR 101467890 B1 KR101467890 B1 KR 101467890B1
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KR
South Korea
Prior art keywords
packing member
knife gate
ejector
space portion
fluid
Prior art date
Application number
KR20140117720A
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Korean (ko)
Inventor
김재환
Original Assignee
일메테크 주식회사
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Priority to KR20140117720A priority Critical patent/KR101467890B1/en
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Publication of KR101467890B1 publication Critical patent/KR101467890B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
    • F16K3/0227—Packings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
    • F16K3/0281—Guillotine or blade-type valves, e.g. no passage through the valve member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Valves (AREA)

Abstract

The present invention relates to a knife gate valve equipped with a foreign substance leakage prevention function using an ejector. According to the disclosed knife gate valve equipped with the foreign substance leakage prevention function using the ejector, a space portion is formed by which an upper packing member and a lower packing member are vertically separated in a packing seal of a valve body, and an ejector module is configured to install a sensing module in the space portion and to be connected to the space portion, thereby increasing pressure by force of a fluid flow in an isolated path when the path is isolated in the down direction of a knife gate and effectively discharging air or water in which a fluid component is contained by operating the ejector module.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a knife gate valve having a foreign matter leakage prevention function using an ejector,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a knife gate valve having a function of preventing the leakage of foreign substances by using an ejector. More specifically, the present invention relates to a knife gate valve And more particularly, to a knife gate valve having a foreign matter leakage prevention function using an ejector that minimizes the flow of fluid through the guide hole when the knife gate moves up and down to control the transfer amount of the fluid.

Generally, a knife gate valve is connected to a pipe to block and open the flow of fluid. Such a knife gate valve controls or opens and closes a flow path of a pipe body to be used for transferring or blocking fluid mixed with sludge such as a wire, a vinyl piece or a coal combustible material such as a paper mill or a thermal power plant as well as fluid, pulp and cement . For example, in a thermal power plant, coal powder used to produce electricity is transported with air, and a knife gate valve is installed in the pipe body to control the amount of coal powder transferred as needed.

The conventional knife gate valve includes a valve body coupled between pipes, a knife gate inserted into the valve body to move up and down, a cylinder for operating the knife gate, a cylinder rod and an air pump, And a plurality of packing members closely adhered to the periphery to maintain airtightness are stacked in multiple stages. The conventional knife gate valve is operated to shut off or open the passage of the pipe while the knife gate is raised or lowered according to the operation of the elevating means, thereby controlling the amount of the fluid transferred along the pipe.

The conventional knife gate valve maintains airtightness by stacking the packing members closely contacting the periphery of the knife gate to maintain the airtightness in a multi-stage manner to prevent leakage of the fluid components. However, The inner side portion of the knife gates may be worn down due to the repeated rise / fall of the knife gates, so that the airtightness of the knife gates may be deteriorated. Particularly, in the state where the airtight state is lowered, the pressure due to the fluid flow is raised when the channel is shut down due to the falling of the knife gate, and the fluid is pushed up to the upper part of the packing member through the gap of the guide hole, There was a problem of leakage of the components. As a countermeasure thereto, a knife gate valve of Utility Model No. 20-0383913 of Korea Register is disclosed as a prior art document.

The present invention has been proposed in order to solve the above-mentioned problems of the previously proposed methods. It is an object of the present invention to provide a valve body in which the upper packing member and the lower packing member are separated from each other, The module is installed and the ejector module communicating with the space portion is constructed so that the pressure of the fluid in the passage blocked in the state in which the passage is blocked by the falling of the knife gate is raised by the fluid force, When the fluid is pushed upward through the minute clearance of the guide hole to increase the pressure of the space portion, the ejector module is operated so that the air or water containing the rotational component of the fluid can be effectively exhausted. And to provide a knife gate valve having a function of preventing foreign matter leakage using the knife gate valve.

In addition, the present invention can minimize the amount of ash that can be flowed out to the upper part of the packing member during the passage blocking process of the knife gate by evacuating air or water containing the rotational component of the space portion to a specific place through operation of the ejector module Another object of the present invention is to provide a knife gate valve having an anti-foreign material leakage function using an ejector, which can effectively prevent equipment breakage due to leakage.

According to an aspect of the present invention, there is provided a knife gate valve having a foreign matter leakage prevention function using an ejector,

A guide hole formed between the pipings to form a passage through which the fluid can move, a guide hole inserted into the knife gate to move up and down in a direction perpendicular to the passage to open and close the passage, The upper packing member and the lower packing member are vertically separated and spaced from each other in the packing chamber of the upper packing member and the lower packing member to form a stepped space portion inside the spaced space between the upper packing member and the lower packing member, A valve body for maintaining a predetermined pressure state predetermined between the packing members;

A pressing and fixing unit fastened to the upper portion of the valve body to press and fix the upper packing member closely attached to the periphery of the knife gate to maintain airtightness;

A lifting means having a cylinder rod engaged with the knife gate and the connector, a cylinder operating to drive the lifting and lowering of the cylinder rod, and an air pump supplying air required for driving the cylinder;

A sensing module installed in the space portion of the valve body for sensing a pressure state between the upper packing member and the lower packing member; And

The pressure of the fluid that is intercepted by the knife gate is lowered to close the passage through which the fluid can move, and the pressure of the fluid is increased. When the pressure of the fluid is applied to the lower packing member, And an ejector module for discharging air or water containing a spin component of the fluid flowing into the space portion in response to a case where the pressure state is exceeded, thereby operating to maintain a predetermined pressure state predetermined in the space portion And is characterized by its constitution.

Preferably, the valve body includes:

The upper packing member and the lower packing member may be formed of at least one or more of an upper packing member and a lower packing member which are separated from each other and separated from each other in the packing chamber.

More preferably, the upper packing member and the lower packing member are made of the same material,

And can act as a guide so that the linear structure of the knife gate can be maintained in a state where the packing chamber is vertically separated and spaced apart.

[0018] Preferably,

Air can be supplied from the air pump of the elevating means so that a predetermined pressure state set in advance for maintaining the separated state between the upper packing member and the lower packing member can be maintained.

More preferably, the ejector module includes:

An inlet port connected to the space portion of the valve body for opening and closing by the solenoid valve, a nozzle through which the supplied driving fluid is injected at a sonic speed, and air or water containing the rotational component of the space portion, And is discharged to a diffuser which mixes with a driving fluid injected at a sonic speed and forms an outlet.

Even more preferably, the ejector module includes:

The valve body may be integrally formed on one side of the valve body, or may be of an external type of a separated type.

According to the knife gate valve having a function of preventing the leakage of foreign substances using the ejector proposed in the present invention, the upper packing member and the lower packing member are vertically separated from each other and formed in the packing chamber of the valve body, The module is installed and the ejector module communicating with the space portion is constructed so that the pressure of the fluid in the passage blocked in the state in which the passage is blocked by the falling of the knife gate is raised by the fluid force, And when the fluid is pushed up through the minute gap of the guide hole to raise the pressure of the space portion, the operation of the ejector module can effectively exhaust the air or water containing the fluid component of the fluid .

In addition, according to the present invention, air or water containing the rotational component of the space portion is exhausted to a specific place through the operation of the ejector module, thereby minimizing the rotational component that can be flowed out to the upper portion of the packing member in the process of shutting off the passage of the knife gate So that equipment damage due to leakage can be effectively prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a knife gate valve having a foreign matter leakage prevention function using an ejector according to an embodiment of the present invention; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a knife gate valve,
3 is a perspective view of a vertical cross-sectional view of a knife gate valve having a foreign matter leakage prevention function using an ejector according to an embodiment of the present invention.
4 is a view showing a space portion of a knife gate valve having a function of preventing foreign matter leakage using an ejector according to an embodiment of the present invention and an installation structure of upper and lower packing members.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an ejector module,
6 is a view for explaining an operating state of an ejector module of a knife gate valve having a function of preventing foreign matter leakage using an ejector according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order that those skilled in the art can easily carry out the present invention. In the following detailed description of the preferred embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In the drawings, like reference numerals are used throughout the drawings.

In addition, in the entire specification, when a part is referred to as being 'connected' to another part, it may be referred to as 'indirectly connected' not only with 'directly connected' . Also, to "include" an element means that it may include other elements, rather than excluding other elements, unless specifically stated otherwise.

FIG. 1 is a front view of a knife gate valve having a foreign matter leakage prevention function using an ejector according to an embodiment of the present invention. FIG. 2 is a cross- 3 is a perspective view of a vertical cross-sectional view of a knife gate valve having a function of preventing foreign matter leakage using an ejector according to an embodiment of the present invention, and FIG. FIG. 4 is a view showing a space portion of a knife gate valve having a function of preventing foreign matter leakage using an ejector according to an embodiment of the present invention and an installation structure of upper and lower packing members. 1 to 4, a knife gate valve 100 having a function of preventing foreign matter leakage using an ejector according to an embodiment of the present invention includes a valve body 110, a pressing and fixing unit 120, An elevating unit 130, a sensing module 140, and an ejector module 150. [

The valve body 110 is provided between the pipes through which the fluid flows and forms a passage 111 through which the fluid can move. The valve body 110 is vertically moved in the direction perpendicular to the passage 111 by inserting the knife gate 112, The upper packing member 115 and the lower packing member 116 are vertically separated from each other in the upper packing chamber 114 where the knife gate 112 is inserted, And a stepped space portion 117 is formed in the spaced space between the upper packing member 115 and the lower packing member 116 so as to form a gap between the upper packing member 115 and the lower packing member 116 So that a predetermined pressure state set in advance is maintained.

3 and 4, the valve body 110 includes an upper packing member 115 and a lower packing member 116 which are vertically separated and spaced apart from each other in a packing chamber 114, The member (115) and the lower packing member (116) may each be composed of at least one or more. Here, the upper packing member 115 and the lower packing member 116 serve as guides so that the linear structure of the knife gate 112 can be maintained in a state where the upper packing member 115 and the lower packing member 116 are vertically separated and spaced apart from each other in the packing chamber 114. The space portion 117 is formed in the upper portion of the upper packing member 115 and the lower packing member 116 so that the predetermined pressure state can be maintained for maintaining the separated space between the upper packing member 115 and the lower packing member 116. [ 133 to receive air.

The pressurizing and fixing unit 120 is configured to press and fix the upper packing member 115 which is fastened to the upper portion of the valve body 110 and closely attached to the periphery of the knife gate 112 to maintain the airtightness. The pressurizing and fixing unit 120 is constructed of a valve body 110 having a GLAND structure that is fastened and fixed using a nut and a screw. Here, the structure of the pressing structure corresponds to a structure generally applied to an ordinary knife gate valve, and thus a detailed description thereof will be omitted.

The elevating means 130 includes a cylinder rod 131 which is fastened to the knife gate 112 by a connector (not shown), a cylinder 132 which is operated to drive the elevating and lowering of the cylinder rod 131, And an air pump 133 for supplying air required for driving the air pump 133. The elevating means 130 corresponds to a generally applicable structure for lifting or lowering a knife gate provided on a conventional knife gate valve, and thus a detailed description thereof will be omitted.

The sensing module 140 is installed in the space portion 117 of the valve body 110 to detect a pressure state between the upper packing member 115 and the lower packing member 116. The sensing module 140 senses a pressure state of the space 117 between the upper packing member 115 and the lower packing member 116 and is provided as information for operation of the ejector module 150 to be described later .

As the knife gate 112 is lowered to close the passage 111 through which the fluid can move, the ejector module 150 is operated so that the pressure of the blocked fluid is raised and the increased pressure is applied to the lower packing member 116 When the pressure of the space portion 117 sensed by the sensing module 140 exceeds a preset specific pressure state, air or water containing a rotational component of the fluid flowing into the space portion 117 is exhausted, (117) is maintained in a predetermined pressure state preset in advance. 5, the ejector module 150 includes an inlet 151 connected to the space 117 of the valve body 110 and opened and closed by a solenoid valve (not shown) A nozzle 152 in which a supplied driving fluid is injected at a sonic speed and an air or water containing a spin component of the space portion 117 are mixed with a driving fluid injected at a sonic velocity in a mixing chamber 153 of an inlet 151 And is discharged to a diffuser 155 which forms an outlet 154. Here, the ejector module 150 may be constructed of a single-nozzle type sound velocity ejector, and may be either an embedded type integrally formed on one side of the valve body 110, or an external type separate type. That is, the ejector module 150 may be configured to integrate the structure of the ejector module 150 into the shape of the valve body 110, or to separate the ejector module 150 from the connecting line (not shown) And may be configured as an external form that is separated by connection and connection.

FIG. 5 is a sectional view of an ejector module applied to a knife gate valve having a foreign matter leakage prevention function using an ejector according to an embodiment of the present invention. Referring to FIG. 5, the ejector module 150 includes an inlet 151 connected to the space 117 of the valve body 110, a nozzle 152 through which the supplied driving fluid is injected at a sonic speed, The air or water containing the spin component of the portion 117 is mixed with the driving fluid injected at a sonic velocity in the mixing chamber 153 of the inlet 151 and discharged to the diffuser 155 forming the outlet 154 .

FIG. 6 is a view for explaining an operating state of an ejector module of a knife gate valve having a function of preventing foreign matter leakage using an ejector according to an embodiment of the present invention. FIG. As shown in FIG. 6, the knife gate valve 100 having the function of preventing the leakage of foreign substances using the ejector according to the embodiment of the present invention includes a passage 111 through which the knife gate 112 is raised, The predetermined pressure state preset in the space portion 117 between the upper packing member 115 and the lower packing member 116 is maintained as the fluid smoothly moves along the passage 111. [ At this time, when the knife gate 112 is lowered and the passage 111 through which the fluid can move is closed, the pressure is raised by the fluid force of the fluid in the blocked passage 111, 116 and the fluid is pushed upward through the minute clearance of the guide hole 113, so that the pressure of the space 117 exceeds a preset specific pressure state. When the pressure of the space portion 117 sensed by the sensing module 140 installed in the space portion 117 exceeds a preset specific pressure state, that is, when the pressure in the space portion 117 increases The air or water containing the rotational component of the fluid flowing into the space portion 117 corresponding to the case where the air or the water containing the rotational component reaches the limit pressure through which the air or water is leaked through the clearance of the upper packing member 115 Or the water is exhausted. The predetermined pressure state set in advance is maintained in the space portion 117 and the upper packing member 115 and the lower packing member 116 in the separated state are kept in a hermetic state with the knife gate 112, Can be minimized.

The present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics of the invention.

100: a knife gate valve according to an embodiment of the present invention
110: valve body 111: passage
112: knife gate 113: guide ball
114: packing chamber 115: upper packing member
116: Lower packing member 117:
120: pressure fixing unit 130: elevating means
131: cylinder rod 132: cylinder
133: air pump 140: sensing module
150: ejector module 151: inlet
152: nozzle 153: mixing chamber
154: outlet 155: diffuser

Claims (6)

A guide 111 which is installed between the pipings and forms a passage 111 through which the fluid can move and a knife gate 112 is inserted and moves up and down in a direction perpendicular to the passage 111 to open and close the passage 111 An upper packing member 115 and a lower packing member 116 are vertically separated and spaced apart from each other in a packing chamber 114 at an upper end portion where the knife gate 112 is inserted, A stepped space portion 117 is formed in the spaced space between the packing member 115 and the lower packing member 116 to form a predetermined space between the upper packing member 115 and the lower packing member 116 A valve body (110) for maintaining a pressure state;
A pressure fixing part 120 fastened to the upper part of the valve body 110 to press and fix the upper packing member 115 which is tightly fitted around the knife gate 112 to maintain the airtightness;
A cylinder 132 which is connected to the knife gate 112 and is connected to the cylinder 131 by a connector, a cylinder 132 which is operated to drive the vertical load of the cylinder rod 131, A lifting means (130) having an air pump (133) for making an air flow;
A sensing module 140 installed in the space portion 117 of the valve body 110 for sensing a pressure state between the upper packing member 115 and the lower packing member 116; And
As the knife gate 112 is lowered to close the passageway 111 through which the fluid can move, the pressure of the shut-off fluid is increased, and the increased pressure is applied to the lower packing member 116, The air or water containing the rotational component of the fluid flowing into the space portion 117 is exhausted to correspond to the case where the pressure of the space portion 117 detected from the space portion 117 exceeds the preset specific pressure state, And an ejector module (150) operable to maintain a predetermined pressure state preset in the ejector (117).
The valve according to claim 1, wherein the valve body (110)
The upper packing member 115 and the lower packing member 116 constitute an upper packing member 115 and a lower packing member 116 which are vertically separated and spaced apart from each other in the packing chamber 114, Wherein the ejector has a function of preventing leakage of foreign matter.
3. The apparatus of claim 2, wherein the upper packing member (115) and the lower packing member (116)
And a knife gate valve having a function of preventing the leakage of foreign matter by using the ejector, characterized in that the knife gate valve (112) acts as a guide to maintain the linear structure of the knife gate (112) .
The display device according to any one of claims 1 to 3, wherein the space portion (117)
Air is supplied from the air pump 133 of the elevating means 130 so that a predetermined pressure state set in advance for maintaining the separate separation state between the upper packing member 115 and the lower packing member 116 can be maintained A knife gate valve having a function of preventing foreign matter leakage by using an ejector.
The apparatus of claim 4, wherein the ejector module (150)
An inlet 151 connected to the space portion 117 of the valve body 110 and controlled by the solenoid valve to be opened and closed, a nozzle 152 through which the supplied driving fluid is injected at a sonic speed, The air or water containing the ash component of the air is mixed with the driving fluid injected at the sonic velocity in the mixing chamber 153 of the inlet 151 and discharged to a diffuser 155 which forms the outlet 154. [ And a knife gate valve having a function of preventing foreign matter leakage using an ejector.
The ejector according to claim 5, wherein the ejector module (150)
The knife gate valve according to any one of the preceding claims, wherein the valve body (110) is integrally formed on one side of the valve body (110).
KR20140117720A 2014-09-04 2014-09-04 A knife gate valve having debris leak-barrier function using ejector KR101467890B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101823553B1 (en) * 2017-08-08 2018-01-31 (주)팬웨스트인터내셔널 Knife Gate Valve
KR102060688B1 (en) * 2018-05-02 2019-12-30 김건호 Knife gate valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200383913Y1 (en) 2005-02-22 2005-05-10 (주)현우산업 Knife gate valve
KR100915341B1 (en) 2008-08-18 2009-09-03 (주)이진엔지니어링 Knife gate valve
JP2011080536A (en) 2009-10-07 2011-04-21 Fuji Koki Corp Ejector device
KR20120110427A (en) * 2011-03-29 2012-10-10 (주)현우산업 Knife gate valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200383913Y1 (en) 2005-02-22 2005-05-10 (주)현우산업 Knife gate valve
KR100915341B1 (en) 2008-08-18 2009-09-03 (주)이진엔지니어링 Knife gate valve
JP2011080536A (en) 2009-10-07 2011-04-21 Fuji Koki Corp Ejector device
KR20120110427A (en) * 2011-03-29 2012-10-10 (주)현우산업 Knife gate valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101823553B1 (en) * 2017-08-08 2018-01-31 (주)팬웨스트인터내셔널 Knife Gate Valve
WO2019031654A1 (en) * 2017-08-08 2019-02-14 주식회사 팬웨스트인터내셔널 Knife gate valve
KR102060688B1 (en) * 2018-05-02 2019-12-30 김건호 Knife gate valve

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