KR101373366B1 - Boiler soot blower poppet valve - Google Patents

Abstract

The present invention provides a soot blower popper valve comprising a valve body having a path for connecting an entrance formed at a lower end and an exit formed on one side wall; an opening and closing member penetrating the upper surface of the valve body to be arranged on the path and opening and closing the path via vertical movement; and a lever part for vertically moving the opening and closing member by having one end part connected to one side of the upper end of the valve body to be able to rotate, having a middle part connected to the upper end of the opening and closing member, and having an operating bar connected to the other end part, thereby forming rotational momentum via an external force exerted on the operating bar. According to the soot blower poppet valve of the present invention, a pushing force sufficient for using a small motor can be ensured and a sufficient lever ratio can be obtained, thereby preventing load on a motor because the soot blower popper valve has a lever structure having the fulcrum and lever effect applied thereto to open and close the valve by generating rotational momentum via the pushing force of a driving part arranged on the transfer path of the driving part to be transferred. And not only the poppet valve is opened and closed correctly and stably but also the supply and interruption of steam is conducted correctly.

Description

Boiler Soot Blower Poppet Valve

The present invention relates to a boiler soot blower poppet valve, and more particularly to a boiler soot blower poppet valve for opening and closing the valve to supply steam by the operation of a lever to form a rotation momentum by an external force.

In general, a large boiler for coal-fired power generation using coal as fuel delivers high-temperature, high-pressure steam energy generated by burning fuel in a boiler to generate electrical energy.

In this process, ash is generated as a combustion material as ash is burned in the boiler furnace. Ash is melted by high temperature combustion heat, and the molten ash is cooled and adsorbed on the boiler inner wall or boiler tube. They accumulate in soot, and the deposits can grow to several meters of clinker.

Since the accumulation hinders the heat transfer of the steam generating tube, a soot blower for removing the accumulation of the outer surface of the tube or the inner wall of the boiler by injecting high-pressure air or high-pressure steam is periodically operated.

The soot blower must open the valve so that the steam (fluid) of high temperature and high pressure can be injected through the injection unit, and close the valve again when the injection is completed, which requires about 1 ton of force to open and close the valve.

However, the conventional poppet valve of the soot blower is designed to open the poppet valve by pressing a simple bar with a rectangular shape protruding upwards, so that sufficient power cannot be obtained. Since a force of about 400 kg may be opened when a soot blower is applied, there is a problem that a large load is applied to the motor.

In addition, the configuration of the gear mechanism, the gearbox, the motor, the lance tube, etc., is lifted up a few mm at the moment when a large force of about 300 to 400 kg is applied from the top to the bottom through the gearbox bottom to open the poppet valve. The reason for this is that the above configurations are mounted on rack gears in an almost unfixed configuration in engagement with the pinion gear, and are heard because a lot of force is applied from the bottom up when opening the poppet valve.

However, the action of such a force not only reduces the stability, durability and reliability in the operation of the soot blower, but also has a problem in that it is difficult to open the poppet valve smoothly.

Korea Patent Registration: 20-0405560 (Notice date 2006. 01. 10)

Korea Patent Registration: 20-0403921 (Notice dated Dec. 14, 2005)

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems,

The object of the present invention is to smoothly open and close the valve with a small force by applying the lever principle of the lever to generate the rotation momentum in response to the external force applied in the horizontal direction, the opening and closing operation of the valve is performed accurately and stably, the motor It is to provide a boiler soot blower poppet valve to prevent the load from being applied.

The soot blower poppet valve of the present invention provided to achieve the above object includes a valve body having an inlet formed at a lower end thereof and a passage connecting an outlet formed at one side wall thereof; An opening / closing member disposed in the passage through the upper surface of the valve body and opening and closing the passage through a vertical movement; One end is rotatably coupled to the upper end side of the valve body, the center portion is coupled to the upper end of the opening and closing member is coupled to the operation bar receiving the external force at the other end to form a rotation moment by the external force applied to the operation bar It includes; lever portion for vertically moving the opening and closing member.

Here, the operation bar is characterized in that it receives an external force applied in the horizontal direction.

In addition, the operation bar is projected upward from the other end of the lever portion is bent in a curved shape toward the external force is applied, characterized in that the roller is rotatably coupled to the front end.

And, the bottom of the other end of the lever portion is characterized in that the buffer spring for providing an elastic force.

The opening and closing member is a hollow stem guide member installed through the upper surface of the valve body, a pressure regulating member coupled to the outer circumferential surface of the lower end of the stem guide member to regulate the pressure of steam, and at the center of the stem guide member. A valve stem inserted and coupled to the lever part and vertically moved by the pressing force of the lever part; a sealing member provided between the valve stem and the stem guide member to prevent leakage of steam; and a bottom surface and the stem guide member of the lever part. It is provided between the elastic member for imparting an elastic force to the valve stem.

Here, the passage of the valve body is provided with a valve seat for opening and closing the passage, the valve stem is a guide bar penetrating the center of the stem guide member, a disk coupled to the lower end of the guide bar in contact with the valve seat, the guide It is coupled to the upper end of the bar consists of a fixing member for fixing the guide bar to the lever portion, characterized in that the passage is opened and closed depending on the contact between the disk and the valve seat according to the vertical movement of the valve stem.

An air relief valve is connected to a surface of the valve body opposite to the outlet, and the air relief valve is closed when the opening and closing member is opened, and is opened when the opening and closing member is closed to supply and block external air. do.

According to the soot blower poppet valve of the present invention, a lever structure applying the lever principle of opening and closing the valve by generating rotation momentum by the pushing force of the driving unit disposed on the conveying path of the driving unit is sufficiently pushed even by using a small motor. The force can be secured and a sufficient lever ratio can be obtained so that the load is not generated in the motor, and the opening and closing operation of the poppet valve is made accurately and stably, and the supply and shutoff operation of steam is made accurately.

1 is a perspective view showing a soot blower poppet valve according to an embodiment of the present invention.
Figure 2 is an exploded perspective view showing a soot blower poppet valve according to an embodiment of the present invention.
Figure 3 is a side view showing a state in which the driving unit of the soot blower according to an embodiment of the present invention to press the lever of the poppet valve.
4 is an enlarged cross-sectional view illustrating main parts of the poppet valve in the state shown in FIG. 3;
FIG. 5 is a side view illustrating a state in which pressing force is released to a lever of a poppet valve by reversing a driving part of a soot blower according to an exemplary embodiment of the present invention; FIG.
FIG. 6 is an enlarged cross-sectional view illustrating main parts of the poppet valve in the state shown in FIG. 4; FIG.

These and other objects, features and other advantages of the present invention will become more apparent by describing in detail preferred embodiments of the present invention with reference to the accompanying drawings. Hereinafter, a soot blower poppet valve of the present invention will be described in detail with reference to the accompanying drawings. For purposes of this specification, like reference numerals in the drawings denote like elements unless otherwise indicated.

1 is a perspective view showing a soot blower poppet valve according to an embodiment of the present invention, Figure 2 is an exploded perspective view showing a soot blower poppet valve according to an embodiment of the present invention.

As shown in FIGS. 1 and 2, the soot blower poppet valve 100 according to the present invention includes a valve body 110, an opening / closing member 120, and a lever part 140.

The valve body 110 has an inlet 111 formed at the lower end thereof, an outlet 112 is formed at one side wall, and a passage 113 connecting the inlet 111 and the outlet 112 is formed therein.

In addition, a fixing block 114 is formed at one end of the valve body 110 to hinge the one end of the lever 130, and a fastening hole communicating with the passage 113 at the center of the upper surface of the valve body 110. 115 is formed, the valve seat 116 for opening and closing the passage is coupled to the center of the passage 113 of the valve body (110).

In addition, a steam generator (not shown) is connected to the inlet 111 of the valve body 110, and a steam guide pipe 500 for guiding steam to the injection unit 400 is connected to the outlet of the valve body 100. Connected.

The opening and closing member 120 is coupled to the hollow stem guide member 121 fastened to the fastening hole 115 formed at the center of the upper surface of the valve body 110 and the outer circumferential surface of the lower end of the stem guide member 121 to improve the pressure of steam. A pressure adjusting member 122 for adjusting and a valve stem 123 inserted into the center of the stem guide member 121 and having an upper end coupled to the lever part 140 and a lower end contacting the lower portion of the valve seat 116; Sealing member 127 and the valve stem is inserted into the valve stem 123 to prevent the leakage of steam between the valve stem 123 and the stem guide member 121 by sealing the inside of the top of the stem guide member 121, It is provided on the outside of the upper end of the 123 and includes an elastic member 130 for imparting an elastic force to the valve stem 123.

Here, the stem guide member 121 is formed of a hollow tube threaded on the outer peripheral surface of the central portion in the longitudinal direction so that the upper end is protruded to the outside of the valve body 110 and the lower end is installed in the passage 113 which is the interior of the valve body 110 It is formed is fastened to the fastening hole 115 of the valve body.

Then, the pressure regulating member 122 is coupled to the lower end of the stem guide member 121 to adjust the pressure of the steam supplied by adjusting the separation distance with the valve seat 116.

And, the valve stem 123 penetrates the center of the stem guide member 121, the upper end is exposed to the top of the stem guide member 121, the lower guide bar 124 is exposed to the lower portion of the stem guide portion 121 And a disk 125 coupled to the lower end of the guide bar 124 and positioned below the valve seat 116, and coupled to the upper end of the guide bar 124 to guide the guide bar 124 to the lever part 140. It includes a fixing member 126 for fixing.

The sealing member 127 is fitted to the outside of the guide bar 124 to seal the inside of the upper end of the stem guide member 121 and a plurality of packings 128 and a stem guide to impart a tightening force to the packing 128. The packing nut 129 is fastened to the inner circumferential surface of the upper end of the member 121.

The elastic member 130 is positioned below the fixing member 126 of the valve stem 123 and coupled to the upper end of the guide bar 124 to transfer the pressing force of the lever unit 140 to the elastic spring 133. A spring washer 131 and an elastic adjustment member 132 fastened to the outside of the upper end of the stem guide member 121 and provided inside the elastic spring 133 to cover the sealing member 127, and a spring washer 131. And an elastic spring 133 coupled between the elastic control member 132 to impart an elastic force to the guide bar 124.

The lever unit 140 has a hinge coupling hole 142 formed at one end thereof, and a fixing block 114 and a hinge 143 formed at one side of the upper end of the valve body 110 are coupled to each other, and a pin coupling hole 144 is formed at the center thereof. And a horizontal bar 141 coupled to the fixing member 126 and the pin 145 to fix the guide bar 124, and an operation bar 146 coupled to the other end of the horizontal bar 141 to receive an external force. .

Here, the operation bar 146 has a curved shape toward one end of the horizontal bar 141 to receive the external force applied in the horizontal direction and to obtain a large rotation moment even in the small external force.

In addition, the curved operation bar 146 is formed in a U-shape erected on the left and right sides in a state where the lower end is connected, the roller 147 is rotatably coupled to the front end. The roller 147 is rotatably coupled between the operation bars 146 that are erected on both sides to receive the maximum external force applied thereto.

In addition, an external force is applied to the operation bar 146 on the bottom of the other end of the horizontal bar 141 to give an elastic force so that the horizontal bar 141 does not collide with the bottom surface when a rotation moment of pressing the other end of the horizontal bar 141 occurs. A shock absorbing spring 148) is provided.

Here, the buffer spring 148 is also used for the purpose of precisely controlling the operation of the poppet valve because the poppet valve does not accurately control the high-temperature, high-pressure steam because the steam is exposed to the outside or the wearer's tube is worn out. That is, when the poppet valve is closed while the external force applied to the operation bar 146 is removed, the other ends of the elastic spring 133 and the horizontal bar 141 which impart elastic force to the guide bar 124 of the valve stem. Due to the dual structure of the shock absorbing spring 148 to give the elastic force is a fast and accurate closing operation of the poppet valve.

Meanwhile, the air relief valve 150 is connected to the other side wall facing the outlet 112 in the passage 113 of the valve body 110.

The air relief valve 150 is closed by the internal pressure of the valve body when the opening and closing member is opened so that the steam supplied from the steam generating unit is supplied to the injection unit through the outlet 112 without being discharged to the outside. When closed, the valve body is automatically opened due to a decrease in the internal pressure, thereby introducing external air into the injection unit 400, and drying the moisture present in the injection unit 400 with the introduced air to the injection unit 400. ) It prevents rust on inner circumferential surface.

The air relief valve 150 has a body portion 151 coupled to the other side wall of the poppet valve, an opening and closing member 152 inserted into the body portion 151 and squeezed by an appropriate length, and the body portion 151. It is provided in the interior of the elastic member 153 to provide a restoring force to the opening and closing member 152, and is located at the rear end of the opening and closing member 152 inserted into the body portion 151 to remove the opening and closing member 152 Nut 154 to prevent.

When the poppet valve is opened and the internal pressure acts, the air relief valve 150 moves the opening / closing member 152 by the internal pressure to close the air relief valve 150. Then, steam is supplied through the open poppet valve, and when the supplied steam is injected through the injection unit 400, moisture is generated inside the injection unit 400. Subsequently, when the poppet valve is closed to lower the internal pressure of the poppet valve, the elastic coefficient of the elastic member 153 of the air relief valve acts relatively larger than the internal pressure of the poppet valve to move the opening / closing member 152. Open the air relief valve 150. Subsequently, outside air is introduced through the open air relief valve 150, and the introduced air dries moisture generated in the injection unit 400.

3 is a side view illustrating a state in which the driving unit of the soot blower is pushed forward to press the lever of the poppet valve according to an embodiment of the present invention, and FIG. 4 is an enlarged main view illustrating the operation of the poppet valve in the state of FIG. 3. 5 is a side view illustrating a state in which the driving part of the soot blower is reversed and the pressing force is released to the lever of the poppet valve, and FIG. 6 is an operation of the poppet valve in the state of FIG. 4. It is an enlarged cross-sectional view showing the main part.

Referring to Figures 3 to 6 will be described the operation of the soot blower poppet valve.

First, the soot blower supports the driving unit 200 and the driving unit 200 to reduce and transmit the rotational force of the rotating motor by receiving power from the outside, and converts the rotational movement of the driving unit 200 into a linear movement to drive the driving unit 200. ) Is transferred to the front and rear conveying unit 300, the injection unit 400 is rotatably coupled to the driving unit 200 receives the rotational force of the driving unit 200 and is entered into the boiler by the transfer of the driving unit 200 It includes.

And, the injection unit 400 is connected to the steam guide pipe 500, the steam guide pipe 500 is connected to the outlet 112 of the poppet valve, the steam generator (not shown) in the inlet 111 of the poppet valve ) Is connected.

In addition, the body 110 of the poppet valve is positioned below the transfer part 300, and the operation bar 146 of the lever part 140 is disposed on the transfer path through which the driving part 200 is transferred, and the operation bar 146. The shock absorbing spring 148 coupled to the bottom surface of the soot blower is installed to be supported on the housing bottom surface.

As shown in FIG. 3, when the power supply is applied and the driving unit 200 is driven, the transfer unit 300 receiving the rotational force of the driving unit 200 converts the rotational movement of the driving unit 200 into a linear movement. The driving unit 200 is transferred. At this time, the driving unit 200 to be advanced by the transfer unit 300 pushes the operation bar 146 disposed in the transfer path.

And, as shown in Figure 4 operating bar 146 received the pushing force of the drive unit 200 is rotated around the hinge by the pressing force of the drive unit 200 to generate a rotation moment, the operation of the operating bar 146 The rotation moment is to press the guide bar 124 of the valve stem coupled to the center of the horizontal bar 141.

Subsequently, the guide bar 124 being pressed down lowers the disk 125 of the valve stem which is in contact with the valve seat 116 to close the passage so as to be spaced apart from the valve seat 116 to open the passage 113 of the poppet valve. Will be opened.

Subsequently, steam of the steam generator is discharged to the outlet 112 through the open passage 113 of the poppet valve and is supplied to the injection unit 400 through the steam guide pipe 500 connected to the outlet 112 so that the injection unit ( Injection is performed through the nozzle of 400). In addition, the injection unit 400 is inserted into the boiler with the transfer of the driving unit 200 and the steam injected by the nozzle of the injection unit 400 is injected into the inner wall of the boiler to clean the inner wall.

At this time, the air relief valve 150 connected to the poppet valve is closed by the internal pressure of the poppet valve.

As shown in FIG. 5, when the injection of steam is completed, the driving unit 200 moves backward by the transfer of the transfer unit 300, and as shown in FIG. 6, the operation bar 146 of the lever unit 140 is As the external force applied to the drive unit 200 is removed, it is restored to its original position, and the guide bar 124 of the valve stem which is pressed at the same time as the restoration of the operation bar 146 is raised, thereby the disk stem 125 of the valve stem. Is in contact with the valve seat 116 to close the passage 113 of the poppet valve. At this time, the valve stem 123 and the lever unit 140 is quickly and accurately restored to the original position by the restoring force of the elastic spring 133 and the buffer spring 148, and the closing operation of the poppet valve is made quickly and accurately do.

Subsequently, when the poppet valve is closed to lower the internal pressure of the poppet valve, the elastic force of the elastic member 153 of the air relief valve 150 is greater than the lower internal pressure of the poppet valve to open / close the member 152 of the air relief valve. This causes the air relief valve 150 to be opened, and external air is introduced through the open air relief valve 150 to dry the moisture generated in the injection unit 400.

As described above, the present invention has a lever structure that opens and closes the valve by rotational moment generated by the pushing force of the driving unit which is disposed in the conveying path of the driving unit, thereby ensuring sufficient pushing force even by using a small motor. It is possible to obtain the ratio of the lever, so that no load is generated on the motor, and the opening and closing operation of the poppet valve is not only accurate and stable, but also the supply and shutoff of the steam is made accurately.

Although the preferred embodiments of the present invention have been described, the present invention is not limited to the specific embodiments described above. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the appended claims, And equivalents may be resorted to as falling within the scope of the invention.

100: poppet valve 110: valve body
111: entrance 112: exit
113: passage 114: fixed block
115: fastening hole 116: valve seat
120: opening and closing member 121: stem guide member
122: pressure regulating member 123: valve stem
124: guide bar 125: disc
126: fixing member 127: sealing member
128: packing 129: packing nut
130: elastic member 131: spring washer
132: elastic adjustment member 133: elastic spring
140: lever portion 141: horizontal bar
142: hinge coupling hole 143: hinge
144: pin coupling hole 145: pin
146: operation bar 147: roller
148: buffer spring 150: air relief valve
151: body portion 152: opening and closing member
153: elastic member 154: nut
200: drive unit 300: transfer unit
400: injection unit 500: steam guide pipe

Claims (7)

A valve body having a passage connecting the inlet formed at the lower end and the outlet formed at one side wall therein and having a valve seat for opening and closing the passage in a passage between the inlet and the outlet; An opening / closing member disposed in the passage through the upper surface of the valve body and opening / closing the valve seat of the passage through vertical movement; One end is rotatably coupled to the upper end side of the valve body, the center portion is coupled to the upper end of the opening and closing member is coupled to the operation bar receiving the external force at the other end to form a rotation moment by the external force applied to the operation bar And a lever unit for vertically moving the opening and closing member.
The opening and closing member is a hollow stem guide member installed to penetrate the upper surface of the valve body, a pressure regulating member coupled to the outer peripheral surface of the lower end of the stem guide member to regulate the pressure of steam, and is inserted into the center of the stem guide member An upper end is coupled to the lever part and is vertically moved by the pressing force of the lever part, a sealing member provided between the valve stem and the stem guide member to prevent leakage of steam, and between the bottom surface of the lever part and the stem guide member. And an elastic member provided to impart an elastic force to the valve stem, wherein the valve stem includes a guide bar penetrating the valve seat through the center of the stem guide member, a disk coupled to the lower end of the guide bar and contacting the valve seat; Including a fixing member coupled to the upper end of the guide bar for fixing the guide bar to the lever portion, Soot blower poppet valve which comprises a passage which is opened and closed depending on the presence or absence of contact with the valve seat disk in accordance with the vertical movement of the probe system. The method of claim 1,
The operation bar is a soot blower poppet valve, characterized in that receiving an external force applied in the horizontal direction. 3. The method of claim 2,
The actuating bar is protruded upward from the other end of the lever portion is curved in a curved direction toward the external force applied, soot blower poppet valve, characterized in that the roller is rotatably coupled to the front end. The method of claim 1,
Soot blower poppet valve, characterized in that the buffer spring for providing an elastic force to the bottom of the other end of the lever portion. delete delete The method of claim 1,
An air relief valve is connected to a surface of the valve body opposite to the outlet, and the air relief valve is closed when the opening and closing member is opened, and is opened when the opening and closing member is closed to supply and block external air. Suit blower poppet valve.

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