KR200283523Y1 - knife gate valve - Google Patents

Abstract

The present invention relates to a knife gate valve that is opened and closed automatically and manually.

In particular, a screw rod formed with a screw, a screw groove is formed to correspond to the screw inward and a plurality of moving projections outwardly projected outwardly, and an upper portion of the inner pipe to which a manual handle and a hydraulic cylinder are connected to the upper part, and is in close contact with the moving projection. It consists of a configuration including the appearance that the plurality of moving grooves are formed inside to move up and down.

Accordingly, the moving protrusion of the inner tube and the moving groove of the exterior are in close contact with each other so that the gate moves up and down quickly and smoothly, and the opening and closing means of the gate is composed of two parts to continuously control and block the flow of the proper fluid. Provides a knife gate valve that works to improve work efficiency.

Description

Knife gate valve

The present invention relates to a gate valve configured to open and close a valve by two means, automatic and manual, and means for blocking the flow of fluid is divided into an opening and closing means operated manually and an opening and closing means operated automatically. When one of the opening and closing means is abnormal, the other opening and closing means can be used, and it is designed to continuously open and close the valve without interrupting the continuous flow of fluid.

In general, the knife gate valve is a device connected between the tube and the tube to block and open and close the flow of the fluid, mainly used as a means for controlling the liquid in the form of a mixture of fluid and other substances and jelly state It has been used to control or open the flow path of the pipe line to transfer or block the fluid, pulp, sludge, cement and the like.

As shown in FIG. 1, a conventional night gate valve includes a valve body 1 coupled between a conduit and a gate inserted into the valve body 1 to control the inflow and outflow of fluid while moving up and down ( 2) and the opening and closing handle 3 which is connected to the upper part of the gate 2 and installed so as to adjust the up and down movement of the gate.

However, such a knife gate valve is difficult to replace and install when the gate valve is replaced in case of an abnormality of the opening device, when the fluid is flowing or when the installation position of the gate valve is located underground or in an uncomfortable place. If the valve opening / closing action occurs frequently, the opening / closing handle (3) controlled by the gate friction is worn, which may cause water leakage on the upper part of the valve body. Hung handle operation is difficult and the precision is not accurate flow control according to the rise and fall of the gate is not made due to the problem of fluid flow and blocking is not smooth.

In addition, when the flow rate of the fluid is manipulated, the rise and fall length of the gate 2 cannot be checked from the outside, so that the supply amount of the fluid cannot be adjusted and shut off, and a high pressure is generated in the movement of the fluid. As the control of the gate 2 becomes difficult, and as the pipeline increases in size, high pressure is generated in proportion to its diameter, so that the operation of the gate 2 becomes more difficult. A problem has occurred.

An object of the present invention for improving the above problems is that the difficulty of valve control by manual opening and closing means when the frictional force or adhesive force of the fluid is large, it is necessary to open and close the replacement means, which can block the flow rate of the fluid It consists of the opening and closing means operated manually and the opening and closing means operated by automatic means that one opening and closing means can be opened and closed continuously by using another opening and closing means immediately when an abnormality such as failure or malfunction occurs. It is to provide a knife gate valve to enable a continuous operation, so that the opening and closing operation of the gate can be quickly and smoothly.

1 is a perspective view showing a conventional knife gate valve.

Figure 2a is a partial cross-sectional view showing a knife gate valve according to the present invention.

Figure 2b is a partial cross-sectional view showing a knife gate valve according to the present invention.

3 is a cross-sectional view taken along the AA cutting line of the knife gate valve according to the present invention.

<Code Description of Main Parts of Drawing>

10 ... screw rod 11 ... screw

20 Interior 21 Screw groove

22 ... gate 26 ... hydraulic cylinder

30.Appearance

In order to achieve the above object, the present invention provides a knife gate valve in which a through hole is opened and closed while the gate is moved up and down, and the gate is installed at the bottom, and an outwardly protruding screw is formed by the moving distance of the gate up and down. A screw rod, and a screw groove is formed on the inner side to engage with the screw, a plurality of moving protrusions are formed to protrude outward in the longitudinal direction on the outer circumference, the upper manual handle operated by the manual movement to raise and lower the screw rod And an inner tube connected to a hydraulic cylinder so that the screw rod is automatically raised and lowered by a screw, and a plurality of moving grooves formed in the longitudinal direction to move upward and downward in close contact with the moving projection of the inner tube. Is done.

The inner tube according to the present invention, the manual handle is characterized in that the rotating projection protruding inwardly in the longitudinal direction along the outer periphery is formed so as to be rotatable in place.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention, as shown in Figure 2a, the gate 22 for controlling the fluid and the screw rod 10 is connected to the gate 22, the inner and outer pipes are rotated to the screw rod 10 and the screw rod 10 20 and the inner tube 20 is largely divided into an exterior 30 installed so as to slide up and down.

The gate 22 is formed to have a size corresponding to a predetermined shape of the through hole 40 so that the through hole 40 may be sealed to control or block a supply amount of the flowing fluid.

The inner end of the screw rod 10, the inner tube 20 and the predetermined length is formed in a shape that can block the through-hole 40 in the bottom portion and extends in connection with the gate 22 A screw 11 having a plurality of threads so as to be rotatable is formed to have a length corresponding to a moving distance of the gate 22.

In addition, the screw 11 connected to the screw rod 10, the inner side of the manual handle 24, so as to reduce the frictional resistance generated when the manual handle 24 moves while contacting the inner tube 20. It is preferable to add oil to reduce the frictional resistance, such as grease or lubrication, to the screw groove 21 formed in the inner side of the screw groove 21 and the inner tube 20.

On the other hand, in the inner tube 20, the screw groove 21 is projected inward to the inner side so that the screw rod 10 is raised and lowered to be engaged with the screw thread of the screw 11 so as to correspond to the screw 11. Is formed, the outer side is in close contact with the exterior 30, the plurality of moving projections 23 are formed so as to protrude outward in the longitudinal direction so that up and down movement is possible, and the manual handle 24 is installed on the top. The manual handle 24 is formed with a screw groove 21 which is rotatably coupled with the screw 11 inward, the screw groove 21 is in close contact with the screw 11 and rotates the screw rod 10 ) Is configured to rise and fall.

Here, as shown in Figure 3, the moving projection 23 formed in the longitudinal direction around the outer periphery of the inner tube 20 is formed to be in close contact with the moving groove 31 formed on the inner side of the exterior (30). And, as it moves in the vertical direction along the moving groove 31 prevents the inner tube 20 is separated from the exterior 30 or rotated to the left and right, the screw rod 10 is fixed to the inner tube 20 is fixed to the rotation ) Also, it can be moved up and down vertically.

In addition, the inner tube 20 has a connecting tube 25 connected to the hydraulic cylinder 26 so that the screw rod 10 engaged with the inner tube 20 can be lifted and lowered automatically. 20) is fixedly installed on the top. The hydraulic cylinder 26 is fixed to the fixed portion 41 and in the state fixed to the fixed portion 41 by raising and lowering the connecting pipe 25 by the forward and backward action of the rod 27. The inner tube 20 is configured to move up and down.

In addition, the upper portion of the inner tube 20, the rotary protrusion 28 is formed along the outer circumference so as to protrude inward so that the manual handle 24 can be rotated in place, in the state sandwiched in the rotary protrusion 28 At the bottom of the manual handle 24 so as to be rotatable, a recess formed in the rotatable protrusion 28 to be rotatable is formed along the outer circumference thereof.

On the other hand, the outer surface 30, as shown in Figure 3, in close contact with the moving projections 23 of the inner tube 20, a plurality of moving grooves 31 to move in the vertical direction up and down inwards. It is formed in the longitudinal direction and the inner tube 20 is fixed to move up and down sliding.

In addition, at the position where the gate 22 and the through-hole 40 are in contact with each other, a Teflon or rubber packing (not shown) is installed to reduce damage occurring during opening and closing and prevent abrasion, and to prevent foreign substances from entering from the outside. You may also do it.

Referring to the operation of the present invention made of such a configuration as follows.

First, when operating with the manual handle 24, when the manual handle 24 is rotated while the manual handle 24 is rotated in the state sandwiched in the rotary projection 28 in the upper portion of the inner tube (20). The screw rod 21 is rotated. At this time, while the screw groove 21 formed inside the manual handle 24 and the screw 11 of the screw rod 10 are engaged, the screw rod 10 is screwed by the rotation of the manual handle 24. The gate 22 connected to the bottom of the screw rod 10 and moved in the vertical direction along the screw thread direction of the c) is moved vertically together to open and close the through hole 40.

On the other hand, when operating as a hydraulic cylinder 26, as shown in Figure 2b, first operates the hydraulic cylinder 26 connected to the connecting pipe 25 connected to the upper portion of the inner tube 20. At this time, the hydraulic cylinder 26 retracts the rod 27 connected to the hydraulic cylinder 26, and as a result, the connecting pipe 25 connected to the rod 27 is raised to engage with the inner tube 20. The screw rod 10 is raised and lowered so that the gate 22 connected to the bottom of the screw rod 10 is raised to open the through hole 40. On the contrary, as shown in FIG. 2A, the hydraulic cylinder ( When the 26 advances the rod 27, the connecting pipe 25 connected to the rod 27 is lowered and thus the screw rod 10 engaged with the inner tube 20 is lowered to lower the screw rod 10. The through hole 40 is closed by the gate 22 connected to the bottom of the lower portion.

Here, when the gate 22 is operated by the hydraulic cylinder 26, the screw groove 21 formed inside the manual handle 24 is brought into contact with the upper end of the screw 11 so that the gate 22 is closed. ) Is moved to the lowest end of the through hole 40 and the rod 27 of the hydraulic cylinder 26 is advanced as much as possible so that the gate 22 completely seals the through hole 40.

The present invention, when operating the opening and closing of the fluid by the manual handle 24 or the hydraulic cylinder 26, it is configured to determine whether the valve opening and closing even by looking at the height of the inner tube 20 or screw rod 10 from the outside There is an advantage that the user can adjust and block the amount of fluid supplied.

According to the present invention, when a fluid having a large friction force or a fluid having a high viscous force has difficulty in controlling a fluid or when a high hydraulic pressure is generated, a difficulty of opening and closing is generated by the manual handle 24 and thus a manual handle 24 In this case, since the control by the force is strong, in this case, the hydraulic cylinder 26 is operated by replacing the manual handle 24, so that the gate 22 may be opened or closed regardless of the type of fluid.

In addition, the present invention, as the opening and closing means of the gate 22, divided into two manual opening and closing means by the automatic opening and closing means by the cylinder by using the other opening and closing means when an abnormality occurs in one opening and closing means, There is an advantage to improve the efficiency of work by enabling the continuous opening and closing work.

In addition, according to the present invention, a moving protrusion 23 is formed in the inner tube 20 and the moving groove 31 is formed in the exterior 30 to be in close contact with the moving protrusion 23 and moves up and down. Leakage of a certain part due to the pressure of the, there is an advantage that the operation of raising and lowering the gate is made smoothly and quickly.

As such, according to the present invention, the moving projection of the inner tube and the moving groove of the exterior are closely contacted to move up and down, so that the gate can be moved up and down smoothly and quickly, and high water pressure generated when controlling a large flow pipe or high pressure fluid In this case, the hydraulic cylinder is used instead of the manual handle to open and close the gate to prevent water leakage and to prevent the gate from sliding and maintain high watertightness. It is possible that the user can easily control and block the amount of fluid supplied.

In addition, the present invention enables manual opening and closing by a manual handle and automatic opening and closing by a hydraulic cylinder, so that when opening or closing is impossible due to one failure or malfunction, it is possible to control and block the flow of fluid using the other. There is an excellent effect such that the work efficiency can be improved by continuous work.

Claims (2)

In the knife gate valve that the through hole 40 is opened and closed while the gate 22 is moved up and down, a screw rod (10) having a screw 11 connected to the bottom and having a screw thread, and A screw groove 21 engaged with the screw 11 is formed on the inner side, and a plurality of moving protrusions 23 are formed to protrude outward in the longitudinal direction on the outer circumference thereof, and the screw rod 10 is lifted on the upper side. An inner tube 20 in which a manual handle 24 which is operated by a manual downward operation and a hydraulic cylinder 26 which is connected to the screw rod 10 to move up and down automatically are installed, and Knife gate valve, characterized in that the inner tube (20) is configured to include an exterior (30) is formed so as to move up and down, the moving groove 31 corresponding to the moving projection 23 in close contact. The knife gate valve of claim 1, wherein the inner tube (20) is provided with a rotary protrusion (28) protruding inwardly along an outer circumference thereof so that the manual handle (24) rotates in place.