KR20170057699A - Rotary Type Knife Gate Valve - Google Patents

Rotary Type Knife Gate Valve Download PDF

Info

Publication number
KR20170057699A
KR20170057699A KR1020150161137A KR20150161137A KR20170057699A KR 20170057699 A KR20170057699 A KR 20170057699A KR 1020150161137 A KR1020150161137 A KR 1020150161137A KR 20150161137 A KR20150161137 A KR 20150161137A KR 20170057699 A KR20170057699 A KR 20170057699A
Authority
KR
South Korea
Prior art keywords
knife gate
valve
transmission gear
inlet
valve body
Prior art date
Application number
KR1020150161137A
Other languages
Korean (ko)
Other versions
KR101767522B1 (en
Inventor
안찬우
강동훈
김항기
추헌재
박상원
Original Assignee
동아대학교 산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 동아대학교 산학협력단 filed Critical 동아대학교 산학협력단
Priority to KR1020150161137A priority Critical patent/KR101767522B1/en
Publication of KR20170057699A publication Critical patent/KR20170057699A/en
Application granted granted Critical
Publication of KR101767522B1 publication Critical patent/KR101767522B1/en

Links

Images

Classifications

    • 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
    • F16K3/22—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 sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—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 sealing faces shaped as surfaces of solids of revolution with cylindrical valve 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
    • F16K3/22—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 sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—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 sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/26—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 sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in 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
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/53—Mechanical actuating means with toothed gearing
    • F16K31/535—Mechanical actuating means with toothed gearing for rotating valves

Landscapes

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

Abstract

The present invention relates to a rotary knife gate valve capable of reducing the overall size of a valve by minimizing the space limitation by allowing a curved plate-shaped knife gate to rotate in the valve body to open and close the flow passage, The rotary knife gate valve includes an inlet port through which a fluid flows into each of a front portion and a rear portion and a discharge port through which fluid is discharged, and a cylindrical valve chamber is formed between the inlet port and the outlet port to communicate with the inlet port and the outlet port. Wow; A curved plate-shaped knife gate rotatably installed in the valve chamber of the valve body and having a valve hole communicating with the inlet port on one side of the side surface; And rotating means for reciprocally rotating the knife gate at a predetermined angle.

Description

[0001] The present invention relates to a rotary type knife gate valve,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve, and more particularly, to a rotary knife gate valve in which a knife gate of a curved plate type (for example, a semicircular plate) rotates and opens and closes a flow path of a valve body.

In general, a valve is used to control and shut off the flow of fluid in the transfer or supply of a fluid by using a pipe, and is manufactured and used in various forms. Among them, knife gate valves are used to control high-viscosity fluids and to transfer and block pulp, cement, sludge and other powder. The knife gate valve is configured such that the edge of the gate is formed like a blade so as to be closed while cutting the fluid at the time of closing.

Normally, a knife gate valve, which is a shutoff plate having a blade end, descends by the action of a hydraulic cylinder, a pneumatic cylinder, or a motor and is seated in a gate groove formed at a lower end of the valve body, thereby blocking the flow path of the valve body .

However, since the conventional knife gate valve has a larger overall size of the knife gate than the flow passage size (tube diameter) of the valve body, the size of the valve becomes larger, the installation space is limited, foreign substances are likely to remain in the gate groove, There is a problem that a flow loss occurs due to vortex in the groove.

Registration No. 10-1415215 (Registered on June 26, 2014) Registered Utility Model No. 20-0387304 (Registered on June 6, 2005)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a knife gate structure in which a knife gate is formed in a curved plate shape (for example, a semicircular plate) The present invention provides a rotary knife gate valve capable of reducing the overall size of a valve to minimize spatial constraints, eliminating the residue of foreign matter in the flow passage, and minimizing vortex phenomenon to improve flow efficiency.

According to an aspect of the present invention, there is provided a rotary knife gate valve comprising: an inlet port through which a fluid flows into a front portion and a discharge port through which fluid is discharged; a cylindrical valve chamber between the inlet port and the outlet port; A valve body formed to communicate with an inlet and an outlet; A curved plate-shaped knife gate rotatably installed in the valve chamber of the valve body and having a valve hole communicating with the inlet port on one side of the side surface; And rotating means for reciprocally rotating the knife gate at a predetermined angle.

According to the present invention, since the knife gate of a curved surface (for example, semicircular) rotates in the valve body to open and close the flow path, the total size of the valve can be reduced to minimize the spatial restriction, The vortex phenomenon can be minimized and the flow efficiency can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional top view of a rotary knife gate valve according to an embodiment of the present invention in a closed state; FIG.
Fig. 2 is a cross-sectional view showing a state in which the flow path of the knife gate valve of Fig. 1 is opened.
Fig. 3 is a longitudinal sectional view seen from the front of the knife gate valve of Fig. 1; Fig.
4 is a perspective view showing a knife gate of the knife gate valve of FIG.
Fig. 5 is a longitudinal sectional view of the knife gate of Fig. 4;
6 is a perspective view showing another embodiment of the knife gate of the knife gate valve according to the present invention.
7 is a longitudinal sectional view of the knife gate of Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a rotary knife gate valve according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 5 show a rotary knife gate valve according to an embodiment of the present invention. 1 to 3, a rotary knife gate valve according to an embodiment of the present invention includes a valve body 10 having a flow path formed therein, A knife gate 20 for opening and closing, and a rotating means for reciprocally rotating the knife gate 20 in both directions at a predetermined angle.

The valve body 10 is formed such that an inlet 11 through which a fluid flows into each of the front portion and a rear portion and a discharge port 12 through which the fluid is discharged are formed in a straight line so as to face each other, A cylindrical valve chamber 13 communicating with the inlet 11 and the outlet 12 is formed. The inlet (11) and outlet (12) of the valve body (10) are respectively connected to the piping.

The stopper 15 is provided at a rear portion of the valve chamber 13 of the valve body 10 at a portion communicating with the discharge port 12 for contacting the both ends of the knife gate 20 and determining the opening and closing positions of the knife gate 20 As shown in Fig.

The knife gate 20 is rotatably installed in the valve chamber 13 of the valve body 10 and has a curved surface 21 formed on one side of the side surface to open a valve hole 21 communicating with the inlet 11. [ For example, a semi-circular plate. In this embodiment, the knife gate 20 is configured to rotate about an axis that is vertically upright on the valve body 10.

4 and 5, the lower surface of the knife gate 20 is open, but the upper surface is closed by a mount plate 23 in the form of a semicircular plate. On the upper surface of the mount plate 23, a rotating shaft portion 24 coupled to the rotating means is formed so as to protrude upward. Therefore, when the rotational force is transmitted to the rotary shaft portion 24 by the rotating means, the knife gate 20 reciprocates in both directions at a predetermined angle about the rotary shaft portion 24.

The valve hole 21 of the knife gate 20 communicates with the inlet 11 or is closed by the side surface of the valve chamber 13. The size of the valve hole 21 is approximately equal to the size of the inlet 11 . The knife gate 20 is formed with a concave recess 22 at a position spaced apart from the valve hole 21 by a predetermined distance and the groove 22 is formed such that the knife gate 20 closes the inlet 11 It is located at the position corresponding to the inlet 11. The groove 22 is formed in a dome shape to mitigate vibrations and shocks caused by the pressure of the fluid when the inlet 11 is closed, thereby preventing breakage or damage of the valve.

The knife gate 20 may have a shape formed by a semicircular curved surface whose flat plate is bent backward as in this embodiment. However, as shown in Figs. 6 and 7, a curved plate bent in a semicircular shape may have a semicircular curved surface As shown in FIG. When the entire knife gate 20 has a concave semicircular curved surface shape, the fluid is returned in the tangential direction while striking the surface of the knife gate 20, so that vibration and shock due to the pressure of the fluid can be further alleviated .

It is preferable that the knife gate 20 has a sharp-pointed shape at both ends so as to smoothly rotate even with a small force when cutting a viscous fluid.

3, the rotating means for rotating the knife gate 20 includes a drive shaft 31 rotatably installed through the valve body 10 and rotated by an external force applied from the outside, A driving gear 32 coupled to the driving shaft 31 to rotate and a first transmission gear 33 coupled to the driving gear 32 to rotate; A second transmission gear 34 which rotates together with the first transmission gear 33 and a second transmission gear 34 which meshes with the second transmission gear 34 and rotates by receiving a rotational force from the second transmission gear 34, And a handle 36 coupled to an end of the drive shaft 31 at the outside of the valve body 10 so as to be held by a person by hand.

The drive shaft 31 coupled to the handle 36 is rotated and the rotational force of the drive shaft 31 is transmitted to the drive gear 32 The first transmission gear 33 and the second transmission gear 34 are sequentially transmitted to the gate shaft gear 35 so that the knife gate 20 rotates around the rotary shaft portion 24.

The rotary knife gate valve of the present invention thus constituted operates as follows.

The groove 22 of the knife gate 20 is positioned at a position facing the inlet 11 in a state where the knife gate 20 closes the inlet 11 of the valve body 10, 11).

When the valve is to be opened in this state, when the person holds the handle 36 by hand and rotates, the drive shaft 31 and the drive gear 32 rotate and the rotational force is transmitted to the first transmission gear 33 and the second transmission gear 33. [ And is transmitted to the gate shaft gear 35 through the pinion gear 34 to rotate the knife gate 20.

2, when the knife gate 20 rotates and the valve hole 21 reaches a position where the valve hole 21 coincides with the inlet 11, one end of the knife gate 20 is located near the outlet 12 The rotation of the knife gate 20 is restricted while the passage of the valve body 10 is opened. The fluid introduced through the inlet port 11 of the valve body 10 is discharged to the outside through the outlet port 12. [

As described above, the rotary type knife gate valve of the present invention can reduce the total size of the valve by minimizing the spatial constraint by opening and closing the flow passage while the curved (for example, semicircular) knife gate 20 rotates in the valve body 10 It is possible to eliminate the residue of the foreign matter in the flow path, minimize the vortex phenomenon, and improve the flow efficiency.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the appended claims. And it is to be understood that such modified embodiments belong to the scope of protection of the present invention defined by the appended claims.

10: valve body 11: inlet
12; Outlet 13: valve chamber
15: stopper 20: knife gate
21: valve hole 22: groove
23: Mount plate 24:
31: drive shaft 32: drive gear
33: first transmission gear 34: second transmission gear
35: gate shaft gear 36: handle

Claims (8)

A cylindrical valve chamber (13) is provided between the inlet (11) and the outlet (12), and an inlet (11) for introducing fluid into each of the front portion and the rear portion and an outlet And a valve body (10) formed to communicate with the discharge port (12);
A curved plate-shaped knife gate 20 rotatably installed in the valve chamber 13 of the valve body 10 and having a valve hole 21 communicating with the inlet 11 at one side thereof, Wow;
And rotating means for reciprocally rotating the knife gate (20) by a predetermined angle. 2. The valve mechanism according to claim 1, wherein the rotating means comprises: a drive shaft (31) rotatably installed through the valve body (10) and rotatable by an external force externally applied; A first transmission gear 33 coupled to the drive gear 32 and rotated together with the first transmission gear 33 and a second transmission gear 33 connected coaxially with the first transmission gear 33, And a gate shaft gear 35 coupled to the knife gate 20 and coupled to the second transmission gear 34 to receive a rotational force from the second transmission gear 34. The second transmission gear 34, ) Of the knife gate valve. [3] The apparatus according to claim 2, wherein the rotating means further comprises a handle (36) coupled to an end of the drive shaft (31) outside the valve body (10) Typical knife gate valve. 3. The apparatus according to claim 2, wherein the upper surface of the knife gate (20) is closed by a mount plate (23) in the form of a semicircular plate, and the gate shaft gear And the rotary shaft portion (24) is formed so as to protrude upward. The knife gate according to claim 1, wherein the knife gate (20) is formed with a dome-shaped groove (22) recessed rearward at a position spaced apart from the valve hole (21) Is located at a position corresponding to the inlet (11) when closing the inlet (11). The rotary knife gate valve according to claim 1, wherein both ends of the knife gate (20) have a pointed shape in a blade shape. The rotary knife gate valve according to claim 1, wherein the knife gate (20) is formed by a semicircular curved surface bent backward in a semicircular shape. The apparatus according to claim 1, wherein an opening / closing position of the knife gate (20) is determined at a portion of the valve body (10) which is in communication with the discharge port (12) And the two stoppers (15) are formed so as to protrude.
KR1020150161137A 2015-11-17 2015-11-17 Rotary Type Knife Gate Valve KR101767522B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150161137A KR101767522B1 (en) 2015-11-17 2015-11-17 Rotary Type Knife Gate Valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150161137A KR101767522B1 (en) 2015-11-17 2015-11-17 Rotary Type Knife Gate Valve

Publications (2)

Publication Number Publication Date
KR20170057699A true KR20170057699A (en) 2017-05-25
KR101767522B1 KR101767522B1 (en) 2017-08-11

Family

ID=59050770

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150161137A KR101767522B1 (en) 2015-11-17 2015-11-17 Rotary Type Knife Gate Valve

Country Status (1)

Country Link
KR (1) KR101767522B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111609160A (en) * 2020-06-02 2020-09-01 吴恒 Water tap with water leakage-free belt pressurizing function

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3047006B2 (en) * 1996-10-30 2000-05-29 鐘紡株式会社 Curtain interlining and manufacturing method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111609160A (en) * 2020-06-02 2020-09-01 吴恒 Water tap with water leakage-free belt pressurizing function

Also Published As

Publication number Publication date
KR101767522B1 (en) 2017-08-11

Similar Documents

Publication Publication Date Title
NO338629B1 (en) Device for injecting fluid into an oil well
KR101403700B1 (en) Knife stopping water valve
CN109695748B (en) Duplex valve device
KR101767522B1 (en) Rotary Type Knife Gate Valve
CN105736806A (en) Butterfly valve
CN205618790U (en) Butterfly valve
CN206522502U (en) A kind of hard sealing hand rotary valve
KR200431986Y1 (en) Angle check valve
RU2485377C2 (en) Compact flap valve
JP2000179713A (en) Valve device
JP2007321960A (en) Two-way valve and door check device
CN208793706U (en) A kind of lining fire safe type high temperature tee joint butterfly valve
CN206487911U (en) A kind of antiseep swing check valve
KR101238422B1 (en) Guide structure of Knife gate valve
KR20110076081A (en) Closing valve
CN104832660B (en) A kind of two-way soft sealing butterfly valve of screw rod keying
KR100831921B1 (en) Cushion check valve
CN111623134A (en) Valve ball structure and ball valve switch thereof
CN201434092Y (en) Large offset butterfly valve
CN211231616U (en) Convenient-to-open and-close screw rod for valve
CN109654231B (en) Protective device for valve
RU70699U1 (en) BALL VALVE
CN203421232U (en) Inclined-clack type check valve free of striking
KR20220045321A (en) Cylindrical rotary central opening and closing gate valve
CN210344317U (en) Butterfly valve with lower limiting device

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant