CN214305362U - Sediment pneumatic door and coal pulverizer are arranged to coal pulverizer - Google Patents
Sediment pneumatic door and coal pulverizer are arranged to coal pulverizer Download PDFInfo
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- CN214305362U CN214305362U CN202120150272.5U CN202120150272U CN214305362U CN 214305362 U CN214305362 U CN 214305362U CN 202120150272 U CN202120150272 U CN 202120150272U CN 214305362 U CN214305362 U CN 214305362U
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Abstract
The utility model provides a sediment pneumatic door and coal pulverizer are arranged to the coal pulverizer, include: the valve seat comprises an upper valve seat and a lower valve seat which are oppositely arranged at intervals, the upper valve seat is provided with a first sealing surface and a second sealing surface provided with a feeding hole, the lower valve seat is provided with a third sealing surface and a fourth sealing surface provided with a discharging hole, and the distance between the first sealing surface and the third sealing surface is smaller than the distance between the second sealing surface and the fourth sealing surface; the valve core is positioned between the upper valve seat and the lower valve seat and comprises an upper valve plate and a lower valve plate which are oppositely arranged at intervals, and the distance between the upper valve plate and the lower valve plate is greater than the distance between the second sealing surface and the fourth sealing surface; and the pneumatic device is provided with a piston rod, and the piston rod is connected with the valve core and is suitable for driving the valve core to move between the slag discharging channel and the sealing cavity so as to close or open the feeding hole and the discharging hole. Go up the valve plate like this and can support the disk seat with lower valve plate more closely, avoid going up the valve plate deformation to avoid sediment pneumatic door jam, probability of leaking out better.
Description
Technical Field
The utility model relates to a coal pulverizer field particularly, relates to a sediment pneumatic door and a coal pulverizer are arranged to coal pulverizer.
Background
The pebble coal vacuum cleaning system is a system for vacuum cleaning waste pebble coal produced by a coal mill by using negative pressure by utilizing a pneumatic transmission principle. Due to the frequent use of the pebble coal deslagging door, the pebble coal deslagging door is opened and closed for about 50 times every day on average, and the probability of blockage and air leakage of the pebble coal deslagging door is increased. The sediment door deposition is unsmooth frequently appears, closes not strictly to leak hot-blastly, leads to unusual circumstances such as inside coking, has seriously influenced pebble coal negative pressure vacuum system's normal operating, for avoiding the emergence of the frequent emergence of phenomenon such as leaking, jamming of pebble coal sediment door in service, improve equipment reliability, security, urgent need carry out technical transformation to pebble coal sediment pneumatic door.
In view of this, the present invention is provided.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in overcoming prior art's not enough, provides a sediment pneumatic door and coal pulverizer are arranged to the coal pulverizer to solve the easy problem of puckery, leaking wind of current pebble coal row sediment door.
In order to solve the technical problem, the utility model adopts the following basic concept:
the utility model provides a sediment pneumatic door is arranged to coal pulverizer, include:
the valve seat comprises an upper valve seat and a lower valve seat which are oppositely arranged at intervals, the upper valve seat is provided with a first sealing surface and a second sealing surface provided with a feeding hole, the lower valve seat is provided with a third sealing surface and a fourth sealing surface provided with a discharging hole, the first sealing surface and the third sealing surface jointly define a sealing cavity, the second sealing surface and the fourth sealing surface jointly define a slag discharging channel, and the distance between the first sealing surface and the third sealing surface is smaller than the distance between the second sealing surface and the fourth sealing surface;
the valve core is positioned between the upper valve seat and the lower valve seat, the valve core comprises an upper valve plate and a lower valve plate which are oppositely arranged at intervals, and the distance between the upper valve plate and the lower valve plate is greater than the distance between the second sealing surface and the fourth sealing surface;
and the pneumatic device is provided with a piston rod, and the piston rod is connected with the valve core and is suitable for driving the valve core to move between the slag discharge channel and the sealing cavity so as to close or open the feed port and the discharge port.
In the above technical solution, the first sealing surface and the second sealing surface are in an inclined transition; and/or an inclined transition between the third sealing surface and the fourth sealing surface.
In any of the above solutions, the first sealing surface and/or the second sealing surface and/or the third sealing surface and/or the fourth sealing surface are metal hard sealing surfaces.
In any one of the above technical solutions, the upper valve seat includes an upper valve seat body and a first metal hard sealing body, a part of the upper valve seat body forms the first sealing surface, another part of the upper valve seat body is provided with the feed port, a mounting groove is formed around the feed port, the first metal hard sealing body is disposed in the mounting groove, and the first metal hard sealing body forms the second sealing surface; and/or
The lower valve seat comprises a lower valve seat body and a second metal hard sealing body, wherein the third sealing surface is formed in one partial area of the lower valve seat body, the discharge port is formed in the other partial area of the lower valve seat body, an installation groove is formed in the periphery of the discharge port, the second metal hard sealing body is arranged in the installation groove, and the fourth sealing surface is formed on the second metal hard sealing body.
In any one of the above technical solutions, the upper valve plate has a first abutting sealing surface and a first flow guiding inclined surface, one side of the first abutting sealing surface is opposite to the second sealing surface, the first flow guiding inclined surface is located on one side of the first abutting sealing surface, which is far away from the second sealing surface, and the first flow guiding inclined surface is transitionally engaged with the edge of the first abutting sealing surface and extends obliquely towards the direction far away from the first abutting sealing surface; and/or
The lower valve plate is provided with a second abutting sealing surface and a second flow guide inclined surface, one side of the second abutting sealing surface is opposite to the fourth sealing surface, the second flow guide inclined surface is located on one side, deviating from the fourth sealing surface, of the second abutting sealing surface, the second flow guide inclined surface is in transitional connection with the edge, leaning against the sealing surface, of the second abutting sealing surface, and extends in an inclined mode towards the direction far away from the second abutting sealing surface.
In any one of the above technical solutions, the valve core further includes:
the upper valve plate and the lower valve plate are respectively provided with a connecting groove, and the connecting block extends into the connecting grooves of the upper valve plate and the lower valve plate to connect the upper valve plate and the lower valve plate;
the connecting ring is located between the upper valve plate and the lower valve plate and sleeved on the connecting block, a connecting handle is formed on the side wall of the connecting ring, and the connecting handle is connected with the piston rod.
In any one of the above technical solutions, the connecting ring abuts against the upper valve plate and the lower valve plate, and the valve core further includes a positioning pin, and the positioning pin is connected with the upper valve plate, the connecting ring and the lower valve plate.
In any of the above technical solutions, the method further includes: the middle shell body, pneumatic means includes the cylinder, the cylinder with be connected through middle shell body between the disk seat, the part of piston rod is located in the cylinder, another part process middle shell body stretches into in the disk seat, packing seal assembly locates in the middle shell body, packing seal assembly includes filler, gland and spring, wherein, the filler set up in the packing intracavity that middle shell body formed, the gland stretches into the packing intracavity and the extrusion the filler, the one end of spring supports and leans on middle shell body, and the other end supports and promotes the gland.
In any one of the above technical solutions, the pneumatic device has an electromagnetic switch, and the air intake or exhaust of the cylinder is controlled by the electromagnetic switch.
The utility model also provides a coal pulverizer, include as above-mentioned any one technical scheme the sediment pneumatic door is arranged to the coal pulverizer.
The utility model discloses in, pneumatic means work is in order to drive the plug and move between seal chamber and slag discharge passageway, in detail, drive plug motion to seal chamber when pneumatic means, make the case open feed inlet and discharge gate, the cinder can be discharged from feed inlet and discharge gate, drive plug motion to slag discharge passageway when pneumatic means, make the case close feed inlet and discharge gate, wherein, the distance between first sealed face and the third sealed face is less than the distance between second sealed face and the fourth sealed face, the case is after moving to seal chamber from slag discharge passageway like this, go up the valve plate and can support the disk seat more closely with lower valve plate, the cinder on avoiding going up the valve plate is driven to between last valve plate and the disk seat, avoid going up the valve plate deformation, thereby avoid sediment pneumatic valve jam, the probability of leaking out of wind better, and the utility model discloses more existing connect through the spring coupling to go up, The scheme of lower valve plate, the spring takes place fatigue damage, the problem of elastic failure easily after long-term the use to lead to the sealed not tight problem of upper and lower valve plate, and the utility model discloses a design that the distance between first sealed face and the third sealed face is less than the distance between the sealed face of second and the fourth sealed face realizes the sealed of case, and sealed reliability is higher, and uses for a long time and also can effectively guarantee the leakproofness.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic cross-sectional view of a slag discharge pneumatic door of a coal pulverizer according to the present invention;
fig. 2 is a partially enlarged structural view of a portion a shown in fig. 1.
In the figure: 100. a slag discharge pneumatic door of the coal mill; 101. a feed inlet; 102. a discharge port; 103. sealing the cavity; 104. a slag discharge channel; 110. a valve seat; 1101. a first sealing surface; 1102. a second sealing surface; 1103. a third sealing surface; 1104. a fourth sealing surface; 111. an upper valve seat; 1111. an upper seat body; 1112. a first metal hard seal; 112. a lower valve seat; 1121. a lower valve seat body; 1122. a second metal hard seal;
120. a valve core; 121. an upper valve plate; 1211. a first abutting sealing surface; 1212. a first diversion inclined plane; 122. a lower valve plate; 1221. a second abutting sealing surface; 1222. a second diversion inclined plane; 123. connecting blocks; 124. a connecting ring; 125. a connecting handle;
130. a pneumatic device; 131. a piston rod; 132. a cylinder;
140. a middle housing; 150. a packing seal assembly; 151. a filler; 152. a gland; 153. a spring.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 and 2, the present invention provides a slag discharge pneumatic door 100 for a coal pulverizer, which comprises a valve seat 110, a valve core 120 and a pneumatic device 130.
Specifically, the valve seat 110 includes an upper valve seat 111 and a lower valve seat 112 which are oppositely and separately arranged, the upper valve seat 111 has a first sealing surface 1101 and a second sealing surface 1102 provided with the feeding hole 101, the lower valve seat 112 has a third sealing surface 1103 and a fourth sealing surface 1104 provided with the discharging hole 102, wherein the first sealing surface 1101 and the third sealing surface 1103 jointly define the sealing cavity 103, the second sealing surface 1102 and the fourth sealing surface 1104 jointly define the slag discharge passage 104, and the distance between the first sealing surface 1101 and the third sealing surface 1103 is smaller than the distance between the second sealing surface 1102 and the fourth sealing surface 1104.
The pneumatic device 130 has a piston rod 131, and the piston rod 131 is connected to the valve core 120 and adapted to drive the valve core 120 to move between the slag discharge passage 104 and the sealed chamber 103 to close or open the feeding hole 101 and the discharging hole 102.
In the present invention, the pneumatic device 130 works to drive the valve plug 120 to move between the sealed cavity 103 and the slag discharge passage 104, in detail, when the pneumatic device 130 drives the valve plug 120 to move to the sealed cavity 103, so that the valve plug 120 opens the feeding hole 101 and the discharge hole 102, the cinder can be discharged from the feeding hole 101 and the discharge hole 102, when the pneumatic device 130 drives the valve plug 120 to move to the slag discharge passage 104, so that the valve plug 120 closes the feeding hole 101 and the discharge hole 102, wherein the distance between the first sealing surface 1101 and the third sealing surface 1103 is smaller than the distance between the second sealing surface 1102 and the fourth sealing surface 1104, so that after the valve plug 120 moves from the slag discharge passage 104 to the sealed cavity 103, the upper valve plate 121 and the lower valve plate 122 can be more closely abutted against the valve seat 110, thereby preventing the cinder on the upper valve plate 121 from being driven to between the upper valve plate 121 and the valve seat 110, and preventing the upper valve plate 121 from deforming, thereby better preventing the slag discharge pneumatic valve from being jammed, Probability of leaking out, and the utility model discloses the more current scheme of passing through spring 153 and connecting upper and lower valve plate 122, the problem of fatigue damage, elasticity inefficacy takes place easily after spring 153 uses for a long time to lead to the sealed not tight problem of upper and lower valve plate 122, and the utility model discloses a design that the distance between sealed face 1101 of first sealed face 1101 and the third sealed face 1103 is less than the distance between sealed face 1102 of second and the sealed face 1104 of fourth realizes the sealed of case 120, and sealed reliability is higher, and uses for a long time and also can effectively guarantee the leakproofness.
In some embodiments, a ramping transition between the first and second sealing surfaces 1101, 1102 and/or a ramping transition between the third and fourth sealing surfaces 1103, 1104 is provided. The inclined transition is utilized to avoid the clamping stagnation of the movement of the valve core 120 and ensure the smoothness of the movement of the valve core 120.
In some embodiments, the first and/or second sealing surfaces 1101, 1102, 1103, 1104 and/or the fourth sealing surface are metal hard sealing surfaces. The metal hard sealing surface has a more reliable sealing effect, and further prevents coal slag from being stuck between the valve seat 110 and the valve core 120.
In some embodiments, the upper seat 111 comprises an upper seat body 1111 and a first metal hard seal body 1112, a part of the upper seat body 1111 forms the first sealing surface 1101, another part of the upper seat body 1111 is provided with the feed port 101, and a mounting groove is formed around the feed port 101, the first metal hard seal body 1112 is arranged in the mounting groove, and the first metal hard seal body 1112 is formed with the second sealing surface 1102; and/or
The lower valve seat 112 includes a lower valve seat body 1121 and a second metal hard seal body 1122, a part of the lower valve seat body 1121 forms the third sealing surface 1103, the other part of the lower valve seat body 1121 is provided with the discharge port 102, a mounting groove is provided around the discharge port 102, the second metal hard seal body 1122 is provided in the mounting groove, and the second metal hard seal body 1122 is formed with a fourth sealing surface 1104.
In this embodiment, the upper valve seat 111 includes an upper valve seat body 1111 and a first metal hard sealing body 1112, and the first metal hard sealing body 1112 is installed on the upper valve seat body 1111, so that the replaceability of the first metal hard sealing body 1112 is realized, the upper valve seat 111 is prevented from being made of a metal hard sealing material with high cost as a whole, and the cost is saved.
Therein, it is worth noting that the first sealing surface 1101 is an upper seat body 1111, which may not require a specific metal hard seal.
The lower valve seat 112 is similar in structure and will not be described in detail herein.
In some embodiments, the upper valve plate 121 has a first abutting sealing surface 1211 and a first flow-directing ramp 1212, the first abutting sealing surface 1211 being on a side opposite the second sealing surface 1102, the first flow-directing ramp 1212 being located on a side of the first abutting sealing surface 1211 facing away from the second sealing surface 1102, and the first flow-directing ramp 1212 transitioning with an edge of the first abutting sealing surface 1211 and extending obliquely away from the first abutting sealing surface 1211; and/or
The lower valve plate 122 has a second abutting sealing surface 1221 and a second diversion chamfer 1222, one side of the second abutting sealing surface 1221 is opposite to the fourth sealing surface 1104, the second diversion chamfer 1222 is located on one side of the second abutting sealing surface 1221 facing away from the fourth sealing surface 1104, and the second diversion chamfer 1222 transitions with an edge of the second abutting sealing surface 1221 and extends obliquely away from the second abutting sealing surface 1221.
In the present embodiment, on the one hand, the cinder is not easy to be retained between the upper valve plate 121 and the lower valve plate 122 by the first diversion inclined surface 1212 and the second diversion inclined surface 1222, on the other hand, the weight of the upper valve plate 121 and the lower valve plate 122 is greatly reduced, the load of the pneumatic device 130 is reduced, and the valve core 120 may be driven by the pneumatic device 130 more easily and in a labor-saving manner.
In some embodiments, the valve cartridge 120 further includes a connecting block 123 and a connecting ring 124.
The connecting ring 124 is located between the upper valve plate 121 and the lower valve plate 122 and sleeved on the connecting block 123, a connecting handle 125 is formed on the side wall of the connecting ring 124, and the connecting handle 125 is connected with the piston rod 131.
Adopt connecting block 123 to connect upper valve plate 121 and lower valve plate 122, it is more reliable to connect like this, and connecting block 123 is difficult to take place deformation, make the distance between upper valve plate 121 and the lower valve plate 122 keep unchangeable, thereby it leads to the distance between upper valve plate 121 and the lower valve plate 122 to diminish to have avoided upper valve plate 121 and lower valve plate 122 to compress each other in the long-term use, guarantee that upper valve plate 121 and lower valve plate 122 and sealed face closely support and lean on, and then guarantee to arrange the sealed reliability of sediment pneumatic door.
The connecting ring 124 is designed to be sleeved on the connecting block 123, the outer wall of the connecting ring 124 is provided with the connecting handle 125, the piston rod 131 is connected with the connecting part, thus the piston drives the connecting block 123 to move through the connecting ring 124, and further drives the upper valve plate 121 and the lower valve plate 122 to move together, and the connecting structure is simpler and firmer.
Further, in order to reduce the load of the pneumatic device 130, the connecting block 123 is provided as a hollow structure, so that the weight of the connecting block 123 is effectively reduced, and the weight of the valve element 120 is further reduced, so that the valve element 120 can be driven by the pneumatic device 130 more easily and in a labor-saving manner.
Further, hollow position mounting spring 153 of connecting block 123 is provided, so that the elastic force of spring 153 acts on upper valve plate 121 and lower valve plate 122, and further upper valve plate 121 and lower valve plate 122 abut against the sealing surface, thereby achieving reliable sealing.
Further, coupling ring 124 abuts against upper valve plate 121 and lower valve plate 122, and valve core 120 further includes a positioning pin that connects upper valve plate 121, coupling ring 124, and lower valve plate 122. The connecting ring 124 is locked by the positioning pin, and the rotation of the connecting ring 124 is avoided, thereby ensuring the reliability of the piston rod 131 driving the valve plug 120.
In some embodiments, the pulverizer extraction pneumatics door 100 further includes an intermediate housing 140 and a packing seal assembly 150.
The pneumatic device 130 includes a cylinder 132, the cylinder 132 is connected to the valve seat 110 through an intermediate housing 140, a portion of the piston rod 131 is located in the cylinder 132, and another portion extends into the valve seat 110 through the intermediate housing 140.
The packing seal assembly 150 is disposed in the middle housing 140, the packing seal assembly 150 includes a packing 151, a gland 152, and a spring 153, wherein the packing 151 is disposed in a packing 151 cavity formed by the middle housing 140, the gland 152 extends into the packing 151 cavity and presses the packing 151, one end of the spring 153 abuts against the middle housing 140, and the other end abuts against and pushes the gland 152. In detail, the sealing packing 151 of the piston rod 131 adopts a graphite molding packing, and the sealing form adopts progressive spring 153 for elastic compensation, so that the daily maintenance work is reduced, and the stability and reliability of the piston sealing are realized.
The connecting part of the valve plate and the air cylinder 132 is sealed by adopting a forming filler 151, and after the sealing is worn, the valve plate is contracted by matching with a spring 153, so that the valve plate is sealed for a long time and has good performance.
In some embodiments, the pneumatic device 130 has an electromagnetic switch by which the cylinder 132 is controlled to intake or exhaust air. Therefore, the opening and closing processes of the slag discharging pneumatic door 100 of the coal mill are controlled by magnetic induction switch signals, the return air of the air cylinder 132 is directly exhausted, the opening and closing of the cold and hot state can be flexibly realized, the operation is convenient, and the opening and closing processes can be realized within 3 s.
Further, to reduce noise, the pneumatic device 130 is provided with a silencer.
The utility model also provides a coal pulverizer, arrange sediment pneumatic door 100 including any one of the above-mentioned embodiment coal pulverizer.
One embodiment
The embodiment provides a slag discharge pneumatic door 100 of a coal mill, wherein the slag discharge pneumatic door 100 of the coal mill is in butt-clamp connection, the whole pneumatic door is of a frame structure and mainly comprises a frame, a track, a door plate, a driving device, a sealing device, a control device and the like and a control box part, the door frame is integrally cast, and the door plate is made of high-alloy stainless steel.
In detail, the door frame forms a valve seat 110, the door panel forms a valve core 120, the valve core 120 is positioned in the valve seat 110 and can move along the valve seat 110 under the driving of a driving device, the valve core 120 comprises a main valve plate and an auxiliary valve plate which are arranged at intervals up and down, the main valve plate is mainly used for opening and closing sealing, and the auxiliary valve plate is used for auxiliary sealing to ensure tightness.
The frame inner sealing surface and the door plate sealing surface are made of wear-resistant hard alloy materials and have good mechanical performance and wear resistance, the frame inner sealing surface is tightly contacted with the door plate sealing surface, and the opening, closing and sealing of the slag discharge door are completed by the driving device. The slag discharge door is arranged perpendicular to the pipeline, and the stroke is controlled by a magnetic induction switch arranged on the main device. Wherein, the driving device is a magnetic cylinder 132, and a rapid exhaust silencer is used for realizing rapid switching.
The upper valve plate 122 and the lower valve plate 122 are respectively provided with a flow guide inclined plane, so that the double valve plates of the slag discharge pneumatic door 100 of the coal mill are designed into anti-blocking and anti-blocking self-flow types, and the valve plates are provided with special self-flow anti-abrasion designs in the valve cavities, so that the problems of erosion abrasion and ash blocking of the valve plates can be effectively solved.
The piston pushes the sealing material to adopt a graphite molding packing, and the sealing form adopts progressive spring 153 for elastic compensation.
The slag discharge pneumatic door 100 of the coal mill of the embodiment has the following advantages:
1. the deslagging pneumatic door 100 of the coal mill has good mechanical property and wear resistance, and solves the problems that a sealing surface is easy to wear due to material erosion, hot air leaks and the service life is short;
2. the slag discharge pneumatic door 100 of the coal mill has low switching noise, realizes the switching process within 3s, and has flexible opening and closing in cold and hot states, no ash blocking and convenient operation;
3. the valve plate is provided with a special self-flowing anti-abrasion design in the valve cavity, and the problems of erosion abrasion and ash blocking of the valve plate can be effectively solved.
The above is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, but the present invention is not limited to the above embodiments, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the technical scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still belong to the scope of the present invention.
Claims (10)
1. The utility model provides a sediment pneumatic door is arranged to coal pulverizer which characterized in that includes:
the valve seat comprises an upper valve seat and a lower valve seat which are oppositely arranged at intervals, the upper valve seat is provided with a first sealing surface and a second sealing surface provided with a feeding hole, the lower valve seat is provided with a third sealing surface and a fourth sealing surface provided with a discharging hole, the first sealing surface and the third sealing surface jointly define a sealing cavity, the second sealing surface and the fourth sealing surface jointly define a slag discharging channel, and the distance between the first sealing surface and the third sealing surface is smaller than the distance between the second sealing surface and the fourth sealing surface;
the valve core is positioned between the upper valve seat and the lower valve seat, the valve core comprises an upper valve plate and a lower valve plate which are oppositely arranged at intervals, and the distance between the upper valve plate and the lower valve plate is greater than the distance between the second sealing surface and the fourth sealing surface;
and the pneumatic device is provided with a piston rod, and the piston rod is connected with the valve core and is suitable for driving the valve core to move between the slag discharge channel and the sealing cavity so as to close or open the feed port and the discharge port.
2. The coal pulverizer slagging pneumatic door of claim 1,
the first sealing surface and the second sealing surface are in inclined transition; and/or
The third sealing surface and the fourth sealing surface are in inclined transition.
3. The coal pulverizer slagging pneumatic door according to claim 1 or 2, wherein the first and/or second and/or third and/or fourth sealing surface is a metal hard sealing surface.
4. The coal pulverizer slagging pneumatic door of claim 3,
the upper valve seat comprises an upper valve seat body and a first metal hard sealing body, wherein a part of area of the upper valve seat body forms the first sealing surface, the other part of area is provided with the feed inlet, a mounting groove is arranged on the periphery of the feed inlet, the first metal hard sealing body is arranged in the mounting groove, and the first metal hard sealing body forms the second sealing surface; and/or
The lower valve seat comprises a lower valve seat body and a second metal hard sealing body, wherein the third sealing surface is formed in one partial area of the lower valve seat body, the discharge port is formed in the other partial area of the lower valve seat body, an installation groove is formed in the periphery of the discharge port, the second metal hard sealing body is arranged in the installation groove, and the fourth sealing surface is formed on the second metal hard sealing body.
5. The coal pulverizer slagging pneumatic door according to claim 1 or 2,
the upper valve plate is provided with a first abutting sealing surface and a first flow guide inclined surface, one side of the first abutting sealing surface is opposite to the second sealing surface, the first flow guide inclined surface is positioned on one side, away from the second sealing surface, of the first abutting sealing surface, and the first flow guide inclined surface is in transition joint with the edge of the first abutting sealing surface and extends obliquely towards the direction away from the first abutting sealing surface; and/or
The lower valve plate is provided with a second abutting sealing surface and a second flow guide inclined surface, one side of the second abutting sealing surface is opposite to the fourth sealing surface, the second flow guide inclined surface is located on one side, deviating from the fourth sealing surface, of the second abutting sealing surface, the second flow guide inclined surface is in transitional connection with the edge, leaning against the sealing surface, of the second abutting sealing surface, and extends in an inclined mode towards the direction far away from the second abutting sealing surface.
6. The coal pulverizer slagging pneumatic valve according to claim 1 or 2, wherein the valve cartridge further comprises:
the upper valve plate and the lower valve plate are respectively provided with a connecting groove, and the connecting block extends into the connecting grooves of the upper valve plate and the lower valve plate to connect the upper valve plate and the lower valve plate;
the connecting ring is located between the upper valve plate and the lower valve plate and sleeved on the connecting block, a connecting handle is formed on the side wall of the connecting ring, and the connecting handle is connected with the piston rod.
7. The coal pulverizer slagging pneumatic door of claim 6,
the connecting ring abuts against the upper valve plate and the lower valve plate, and the valve core further comprises a positioning pin which is connected with the upper valve plate, the connecting ring and the lower valve plate.
8. The coal pulverizer slagging pneumatic door according to claim 1 or 2, further comprising:
the pneumatic device comprises an air cylinder, the air cylinder is connected with the valve seat through the middle shell, one part of the piston rod is positioned in the air cylinder, the other part of the piston rod extends into the valve seat through the middle shell,
the packing sealing assembly is arranged in the middle shell and comprises packing, a gland and a spring, wherein the packing is arranged in a packing cavity formed by the middle shell, the gland extends into the packing cavity and extrudes the packing, one end of the spring is abutted against the middle shell, and the other end of the spring is abutted against and pushes the gland.
9. The coal pulverizer slagging pneumatic door according to claim 8, wherein the pneumatic device has an electromagnetic switch by which the cylinder is controlled to intake or exhaust air.
10. A coal pulverizer comprising the coal pulverizer extraction pneumatic gate of any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120150272.5U CN214305362U (en) | 2021-01-20 | 2021-01-20 | Sediment pneumatic door and coal pulverizer are arranged to coal pulverizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120150272.5U CN214305362U (en) | 2021-01-20 | 2021-01-20 | Sediment pneumatic door and coal pulverizer are arranged to coal pulverizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214305362U true CN214305362U (en) | 2021-09-28 |
Family
ID=77828315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120150272.5U Active CN214305362U (en) | 2021-01-20 | 2021-01-20 | Sediment pneumatic door and coal pulverizer are arranged to coal pulverizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214305362U (en) |
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2021
- 2021-01-20 CN CN202120150272.5U patent/CN214305362U/en active Active
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