CN109838564B - Double-seal high-temperature sealing valve and high-temperature combustible gas conveying system - Google Patents
Double-seal high-temperature sealing valve and high-temperature combustible gas conveying system Download PDFInfo
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- CN109838564B CN109838564B CN201910241026.8A CN201910241026A CN109838564B CN 109838564 B CN109838564 B CN 109838564B CN 201910241026 A CN201910241026 A CN 201910241026A CN 109838564 B CN109838564 B CN 109838564B
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- 238000007789 sealing Methods 0.000 title claims abstract description 86
- 230000007246 mechanism Effects 0.000 claims abstract description 67
- 230000009977 dual effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 26
- 239000003034 coal gas Substances 0.000 description 8
- 239000000428 dust Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 238000000197 pyrolysis Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000011280 coal tar Substances 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
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Abstract
The invention relates to the technical field of sealing, and provides a double-sealing high-temperature sealing valve, which belongs to the double-sealing high-temperature sealing valve and comprises: the valve comprises a valve body, a first valve core, a second valve core, a valve rod assembly and an opening and closing mechanism. The valve body has the inner wall of air inlet valve body and is provided with first annular taper plate and second annular taper plate, and opening and shutting mechanism is connected with the one end of valve rod subassembly, and first case and second case coaxial setting are kept away from the one end of opening and shutting mechanism in valve rod subassembly, and when opening and shutting mechanism control valve rod subassembly moved, can make the edge of first case, the edge of second case respectively with first annular taper plate and second annular taper plate sealing contact or separation simultaneously. The sealing valve has good high-temperature sealing performance. The invention also provides a high-temperature combustible gas conveying system, which comprises the double-seal high-temperature sealing valve provided by the invention, and the safety is good.
Description
Technical Field
The invention relates to the technical field of sealing, in particular to a double-sealing high-temperature sealing valve and a high-temperature combustible gas conveying system.
Background
In the field of coal pyrolysis, coal gas contains a large amount of combustible gas, crushed coal pyrolysis and a large amount of dust in the coal gas, so that the dust is filtered off at a high temperature, the temperature of the filtered coal gas is about 400 ℃ generally, more coal tar is separated out on a filter below the temperature, the coal tar is adhered to the coal dust to be blocked and filtered quickly, and even if the coal tar is not separated out, a dust remover is blocked quickly and is only relatively slow.
Then, in order to ensure continuous operation of coal pyrolysis, a spare dust remover must be arranged, so that when one dust remover cannot meet the requirement of dust removal, coal gas is cut into the other dust remover, the previous dust remover needs to be regenerated, the regeneration is possibly contacted with air, the coal gas is cut into the other way, the closed way of valve must be tightly closed, otherwise, the safety of the system cannot be ensured, although the prior art also achieves a certain result, the diameter of the sealing part of the valve exceeds 700mm, the tightness of valve closing cannot be ensured, and a small amount of coal gas still can be strung into the closed system, so that a great potential safety hazard still exists.
In view of this, the present application has been made.
Disclosure of Invention
The invention provides a double-seal high-temperature sealing valve, which aims to solve the problem that the sealing performance of the existing high-temperature sealing valve is difficult to ensure when the size of a sealing part is large.
The invention also provides a high-temperature combustible gas conveying system, which is high in safety.
The invention is realized in the following way:
The invention provides a double-seal high-temperature sealing valve, which comprises: the valve body, the first valve core, the second valve core, the valve rod assembly and the opening and closing mechanism are arranged at the installation part of the opening and closing mechanism,
The valve body has the air inlet, and the inner wall of valve body is close to air inlet department and is provided with first annular taper plate and second annular taper plate along the length direction of valve body, and first case and second case all are located the valve body, and open and shut the mechanism and be connected with the one end of valve rod subassembly for control valve rod subassembly along the length direction motion of valve body, first case, the coaxial one end that sets up in valve rod subassembly and keep away from open and shut the mechanism of second case, when open and shut mechanism control valve rod subassembly motion, can make the edge of first case, the edge of second case respectively with first annular taper plate and second annular taper plate sealing contact or separation simultaneously.
Further, in a preferred embodiment of the present invention, the opening and closing mechanism, the first annular cone plate, and the second annular cone plate are configured to: when the opening and closing mechanism controls the valve rod assembly to move to the position closest to the air inlet, the edge of the first valve core is in sealing contact with the first annular conical plate, the edge of the second valve core is in sealing contact with the second annular conical plate, and when the opening and closing mechanism controls the valve rod assembly to move in the direction away from the air inlet, the first valve core is separated from the first annular conical plate, and the second valve core is separated from the second annular conical plate.
Further, in a preferred embodiment of the present invention, the edge of the first valve core is a first flange, the first flange is matched with the first annular cone plate, the edge of the second valve core is a second flange, and the second flange is matched with the second annular cone plate.
Further, in the preferred embodiment of the present invention, the valve body includes a valve body, a valve seat and a guide seat which are sequentially connected, the guide seat is closer to the air inlet relative to the valve seat, and the first annular taper plate and the second annular taper plate are both disposed on the inner wall of the valve seat.
Further, in a preferred embodiment of the present invention, a guide post mounting portion is provided at a middle portion of the guide seat, a guide hole is provided at the guide post mounting portion, a guide post is provided at a middle portion of the first valve core, and the guide post passes through the guide hole.
Further, in the preferred embodiment of the present invention, the valve seat is provided with an air seal channel, the first annular cone plate contacts the first valve core, and when the second annular cone plate contacts the second valve core, the first annular cone plate, the second annular cone plate, the first valve core and the second valve core enclose a sealing cavity, and the air seal channel is communicated with the sealing cavity.
Further, in the preferred embodiment of the present invention, the dual-seal high-temperature sealing valve includes an opening and closing mechanism mounting portion connected to an end of the valve body remote from the air inlet, the opening and closing mechanism being disposed in the opening and closing mechanism mounting portion, the opening and closing mechanism including a control lever connected to the valve rod assembly through a buffer mechanism.
Further, in a preferred embodiment of the present invention, the valve rod assembly includes a first valve rod and a second valve rod, the second valve rod is sleeved outside the first valve rod, one end of the control rod is connected with the first valve rod through a buffer mechanism, the middle part of the first valve core is connected with the first valve rod, the middle part of the second valve core is connected with the second valve rod, the buffer mechanism includes a first spring, a second spring and a connecting piece, the control rod is connected with the first valve rod through the connecting piece, the control rod is movable relative to the connecting piece, the first spring is disposed in the connecting piece and between the control rod and the first valve rod, the second spring is disposed between the connecting piece and the second valve rod, and opposite ends of the second spring are respectively abutted with ends of the connecting piece and the second valve rod.
Further, in a preferred embodiment of the present invention, the connecting member includes a connecting sleeve, a movable member, and a connecting disc, one end of the movable member is movably clamped in the connecting sleeve, the movable member is connected with the control lever, the connecting disc is arranged at one end of the connecting sleeve far away from the movable member, the connecting disc is connected with the first valve rod, and the first spring is arranged between the movable member and the connecting disc;
further, in a preferred embodiment of the present invention, the connecting member further includes a pressing piece, the pressing piece is connected to the connecting sleeve through an adjusting screw, an end cover is disposed at an end portion of the second valve rod, which is close to the buffer mechanism, the first valve rod penetrates through the pressing piece and the end cover, and opposite ends of the second spring are respectively abutted to the pressing piece and the end cover.
The invention provides a high-temperature combustible gas conveying system which comprises the double-seal high-temperature sealing valve.
The beneficial effects of the invention are as follows: when the double-seal high-temperature sealing valve is used, due to the fact that two groups of seals are arranged, namely the first valve core is matched with the first annular conical plate, the second valve core is matched with the second annular conical plate, the sealing performance of the sealing valve in a high-temperature environment can be effectively improved, and particularly when the diameter of a sealing part (namely the size of the valve core) exceeds 700mm, good sealing performance can be ensured, and phenomena of air leakage and air leakage are avoided. In addition, in the preferred embodiment of the invention, on the basis of two seals, a gas seal channel and a gas seal cavity are additionally arranged, and the effect of sealing and preventing cross gas can be further enhanced by preventing the communication of combustible gas by using gas which does not react with gas such as nitrogen and the like. When the double-seal high-temperature valve seat provided by the invention is applied to conveying coal gas after coal pyrolysis, the occurrence of safety accidents can be effectively avoided.
The invention also provides a high-temperature combustible gas conveying system, which comprises the double-seal high-temperature sealing valve. Therefore, the safety is high.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a dual seal high temperature seal valve provided by an embodiment of the present invention;
FIG. 2is an enlarged view of area A of FIG. 1;
FIG. 3 is an enlarged view of region B of FIG. 1;
Fig. 4 is an enlarged view of region C in fig. 3.
Icon: 100-double-seal high-temperature sealing valve; 101-an air inlet; 102-an air outlet; 110-valve body; 111-a first spool; 112-a second valve core; 113-a guide seat; 114-a guide hole; 116-a guide post; 118-valve body; 121-sealing the cavity; 130-an opening and closing mechanism mounting part; 150-valve seat; 150 a-a first valve seat; 150 b-a second valve seat; 151-a first annular cone plate; 152-a second annular cone plate; 153-gas seal channel; 154-stone mill packing; 163-a first flange; 164-a second flange; 170-a valve stem assembly; 171-a first valve stem; 172-a second valve stem; 173-end cap; 180-an opening and closing mechanism; 181-control lever; 190-a buffer mechanism; 191-a first spring; 192-a second spring; 193-connector; 194-connecting sleeves; 195-a movable member; 196-connecting plate; 197-tabletting; 198-adjusting the screw.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
As shown in fig. 1 to 3, the present embodiment provides a double-seal high-temperature sealing valve 100 including: the valve body 110, the opening and closing mechanism mounting portion 130, the first valve element 111, the second valve element 112, the valve stem assembly 170, and the opening and closing mechanism 180.
Specifically, the opening and closing mechanism mounting portion 130 is connected with the valve body 110, the valve body 110 is provided with an air inlet 101 and an air outlet 102, the air inlet 101 is arranged at one end of the valve body 110 far away from the opening and closing mechanism mounting portion 130, the air outlet 102 is arranged on the side wall of the valve body 110, a first annular conical plate 151 and a second annular conical plate 152 are arranged on the side wall of the valve body 110 along the length direction of the side wall, the opening and closing mechanism 180 is arranged in the opening and closing mechanism mounting portion 130, the opening and closing mechanism 180 is connected with one end of the valve rod assembly 170 and is used for controlling the valve rod assembly 170 to move along the length direction of the valve body 110, the first valve core 111 and the second valve core 112 are coaxially arranged at one end of the valve rod assembly 170 far away from the opening and closing mechanism 180, and when the opening and closing mechanism 180 controls the valve rod assembly 170 to move, the edge of the first valve core 111 and the edge of the second valve core 112 are respectively in sealing contact with or separation with the first annular conical plate 151 and the second annular conical plate 152.
It should be noted that, the opening and closing mechanism 180 in the present application is an existing structure, and the existing gas sealing valves all have the same opening and closing mechanism as the structure of the present application, and the specific structure and working principle thereof all belong to the prior art, and are not repeated herein.
In use, as shown in fig. 1, the dual-seal high-temperature sealing valve 100 of the present embodiment controls the opening and closing mechanism 180 to move the valve rod assembly 170 downward, so that the first valve core 111 abuts against the first annular conical plate 151, and the second valve core 112 abuts against the second annular conical plate 152, so that the dual-seal high-temperature sealing valve 100 can be closed, and controls the opening and closing mechanism 180 to move the valve rod assembly 170 upward, so that the first valve core 111 is separated from the first annular conical plate 151, and the second valve core 112 is separated from the second annular conical plate 152, so that the dual-seal high-temperature sealing valve 100 is opened. Due to the fact that two groups of seals are arranged, namely the first valve core 111 is matched with the first annular conical plate 151, the second valve core 112 is matched with the second annular conical plate 152, the sealing performance of the sealing valve under the high-temperature environment can be effectively improved, and particularly when the diameter of a sealing part exceeds 700mm, good sealing performance can be ensured, and phenomena of air leakage and air leakage are avoided.
Further, in the present embodiment, the opening and closing mechanism 180, the first annular taper plate 151, the second annular taper plate 152 are configured to: the opening and closing mechanism 180 controls the valve rod assembly 170 to move closest to the air inlet 101, the edge of the first valve core 111 is in sealing contact with the first annular conical plate 151, the edge of the second valve core 112 is in sealing contact with the second annular conical plate 152, and when the opening and closing mechanism 180 controls the valve rod assembly 170 to move in a direction away from the air inlet 101, the first valve core 111 is separated from the first annular conical plate 151, and the second valve core 112 is separated from the second annular conical plate 152. Thus, as can be seen from fig. 3, the respective annular cone plates are arranged in such a manner that the bottom ends extend in a direction approaching the middle of the intake port 101, and the edge of each valve spool is higher than the bottom end of the corresponding annular cone plate.
Of course, in other embodiments of the invention, the opening and closing mechanism 180, the first annular tapered plate 151, and the second annular tapered plate 152 may also be configured such that when the opening and closing mechanism 180 controls the valve rod assembly 170 to move furthest from the air inlet 101, the first valve element 111 contacts the first annular tapered plate 151, the second valve element 112 contacts the second annular tapered plate 152, and when the opening and closing mechanism 180 controls the valve rod assembly 170 to move in a direction approaching the air inlet 101, the first valve element 111 is separated from the first annular tapered plate 151, and the second valve element 112 is separated from the second annular tapered plate 152. Thus, the corresponding specific structure should be that the annular conical plates are arranged in such a way that the top end is closer to the middle of the valve body 110 than the bottom end, and the edge of each valve core is lower than the bottom end of the corresponding annular conical plate.
More specifically, in this embodiment, the shape of the second case towards the one side of air inlet is big-end-down loudspeaker form, overlaps on first case, and first case includes contact tray, strengthening rib and connecting portion, and the one end of connecting portion is connected with the middle part of contact tray, and the other end and the valve rod subassembly of connecting portion are connected, and the strengthening rib sets up in the one side that the contact tray is close to connecting portion to be connected with connecting portion simultaneously, the edge of contact tray be used for with first annular taper plate sealing contact.
Further, the first annular conical plate 151 and the second annular conical plate 152 are made of materials with good deformability and relatively small rigidity, so that when each conical plate is sealed with the corresponding valve core, partial gaps can be compensated, and the sealing performance is relatively good.
Specifically, the opening and closing mechanism 180 includes a control lever 181, and the control lever 181 is connected to the valve stem assembly 170 through a buffer mechanism 190. When the opening and closing mechanism 180 controls the control rod 181 to move up and down, the problem of reduced sealing performance caused by overlarge impact when the valve core is contacted with the valve seat is avoided under the action of the buffer mechanism 190. The valve rod assembly comprises a first valve rod 171 and a second valve rod 172, the second valve rod 172 is sleeved outside the first valve rod 171, one end of a control rod 181 is connected with the first valve rod 171 through a buffer mechanism 190, the middle part of a first valve core 111 is connected with the first valve rod 171, the middle part of a second valve core 112 is connected with the second valve rod 172, the buffer mechanism 190 comprises a first spring 191, a second spring 192 and a connecting piece 193, the control rod 181 is connected with the first valve rod 171 through the connecting piece 193, the control rod 181 is movable relative to the connecting piece 193, the first spring 191 is arranged in the connecting piece 193 and is located between the control rod 181 and the first valve rod 171, the second spring 192 is arranged between the connecting piece 193 and the second valve rod 172, and the opposite ends of the second spring 192 are respectively abutted with the end parts of the connecting piece 193 and the second valve rod 172.
Specifically, the bottom end and the top end of the first valve rod 171 extend out of the second valve rod 172, the bottom end of the first valve rod 171 is connected with the connecting portion of the first valve core 111, and the upper middle portion of the second valve core 112 is sleeved on the outer wall of the end portion of the second valve rod 172.
When the opening and closing mechanism 180 acts, two springs respectively contact the first valve core 111 with the first annular conical plate 151, the second valve core 112 contacts the second annular conical plate 152 to generate a buffer effect, and meanwhile, when the valve is sealed, the valve can compensate expansion caused by heat and contraction caused by cold, so that the valve is protected. This arrangement further prevents the sealing performance of the sealing valve from being affected by the high-force contact.
In the embodiment of the invention, in order to further enhance the sealing performance, a sealing mechanism is generally arranged between the first valve rod and the second valve rod and between the second valve rod and the valve body at the junction of the opening and closing mechanism mounting part and the valve body.
Specifically, the connecting member 193 includes a connecting sleeve 194, a movable member 195, and a connecting plate 196, one end of the movable member 195 is movably clamped in the connecting sleeve 194, the movable member 195 is connected with the control rod 181, the connecting plate 196 is disposed at one end of the connecting sleeve 194 far away from the movable member 195, the connecting plate 196 is connected with the first valve rod 171, and the first spring 191 is disposed between the movable member 195 and the connecting plate 196. When the opening and closing mechanism 180 operates, the control rod 181 presses down the movable member 195, so that the movable member 195 further presses down the first spring 191, then the first spring 191 further presses down the connecting disc 196, and simultaneously presses down the second spring 192, the connecting disc 196 presses down the first valve rod 171, and the second spring 192 presses down the second valve rod 172. In this way, a damping effect is achieved for the two spools when they are in contact with the two annular conical plates, respectively, by the first spring 191 and the second spring 192.
Further, the connecting piece 193 further comprises a pressing piece 197, the pressing piece 197 is connected with the connecting sleeve 194 through an adjusting screw 198, an end cover 173 is arranged at the end part, close to the buffer mechanism 190, of the second valve rod 172, the first valve rod 171 penetrates through the pressing piece 197 and the end cover 173, and two opposite ends of the second spring 192 are respectively abutted against the pressing piece 197 and the end cover 173.
The pressing piece 197 and the adjusting screw 198 are arranged, and the two valve cores can be approximately equal in pressure when the two annular conical plates are respectively pressed by adjusting the adjusting screw 198.
Further, the valve body 110 includes a valve body 118, a valve seat 150 and a guide seat 113 connected in sequence, the guide seat 113 is closer to the air inlet 101 relative to the valve seat 150, and the first annular conical plate 151 and the second annular conical plate 152 are both disposed on the inner wall of the valve seat 150.
The particular arrangement of the valve body 110 facilitates assembly of the entire sealing valve.
Preferably, in the present embodiment, the valve seat 150 includes a first valve seat 150a and a second valve seat 150b, the first annular cone plate 151 is disposed on an inner wall of the first valve seat 150a, and the second annular cone plate 152 is disposed on an inner wall of the second valve seat 150 b. The two valve seats 150 are provided, so that each annular conical plate can independently act when contacting with the corresponding valve core, and the annular conical plates cannot interfere with each other.
The first valve seat 150a, the second valve seat 150b, and the guide seat 113 are connected to the valve body 118 by bolts. The side of the first valve seat 150a contacting the valve body 118, the side of the second valve seat 150b contacting the first valve seat, and the side of the guide seat 113 contacting the second valve seat 150b are all provided with mounting grooves, and stone mill packing 154 is arranged in the mounting grooves for sealing.
In other embodiments of the present invention, a sealing gasket with high temperature resistance may be used for sealing.
Further, the edge of the first valve core 111 is a first flange 163, the first flange 163 is matched with the first annular cone plate 151, the edge of the second valve core 112 is a second flange 164, the second flange 164 is matched with the second annular cone plate 152, and when in sealing, the first flange 163 is in sealing contact with the first annular cone plate 151, and the second flange 164 is in sealing contact with the second annular cone plate 152.
The flange and the valve seat form linear seal at the sealing part, the gap is small, and the sealing effect is relatively high.
Further, the edge of the valve body 110, which is close to the air inlet 101, is also provided with a guide seat 113.
The guide seat 113 is mainly used for facilitating the positioning of the valve seat 150 when the whole sealing valve is assembled.
Further, a guide post mounting portion (not shown) is provided at the middle of the guide seat 113, a guide hole 114 is provided at the guide post mounting portion, a guide post 116 is provided at the middle of the first valve element 111, and the guide post 116 passes through the guide hole 114.
When the double-seal high-temperature sealing valve 100 is installed, the guide post 116 is inserted into a hole provided in advance in the target position. The double-seal high-temperature sealing valve 100 can be installed at a target position with high accuracy.
Further, the valve seat 150 is provided with an air seal channel 153, in this embodiment, the air seal channel 153 is disposed on the second valve seat 150b, the first annular cone plate 151 contacts the first valve core 111, when the second annular cone plate 152 contacts the second valve core 112, the first annular cone plate 151, the second annular cone plate 152, the first valve core 111 and the second valve core 112 enclose a sealing cavity 121, and the air seal channel 153 communicates with the sealing cavity 121.
When the sealing valve is used, after each valve core is correspondingly contacted with each annular conical plate, a hot inert gas source or a hot water vapor source is introduced into the gas sealing channel 153, so that the inert gas and the water vapor are filled into the sealing cavity 121, and only possible inert gas escapes to the outside of the sealing cavity by means of relative high pressure, so that the gas cannot flow in series in the sealing cavity, and the effect of isolating the outside gas from channeling is achieved. Particularly, when the sealing valve provided by the invention is applied to a gas pipeline, gas can be effectively prevented from entering.
In summary, the dual-seal high-temperature valve seat provided by the invention has the advantages that two groups of seals are arranged, namely, the first valve core is matched with the first annular conical plate, and the second valve core is matched with the second annular conical plate, so that the sealing performance of the sealing valve in a high-temperature environment can be effectively improved, and particularly when the diameter of a sealing part (namely, the size of the valve core) exceeds 700mm, the good sealing performance can be ensured, and the phenomena of air leakage and air leakage are avoided. When the double-seal high-temperature valve seat provided by the invention is applied to conveying coal gas after coal pyrolysis, the occurrence of safety accidents can be effectively avoided.
In addition, in the preferred embodiment of the invention, on the basis of two seals, a gas seal channel and a gas seal cavity are additionally arranged, and the effect of sealing and preventing cross gas can be further enhanced by preventing the communication of combustible gas by using gas which does not react with gas such as nitrogen and the like.
The invention also provides a high-temperature combustible gas conveying system which comprises the double-seal high-temperature sealing valve. Therefore, the safety is high.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A dual seal high temperature seal valve comprising: the valve body, the opening and closing mechanism installation part, the first valve core, the second valve core, the valve rod assembly and the opening and closing mechanism,
The valve body is provided with an air inlet, a first annular taper plate and a second annular taper plate are arranged on the inner wall of the valve body, close to the air inlet, along the length direction of the valve body, both the first valve core and the second valve core are positioned in the valve body, the opening and closing mechanism is connected with one end of the valve rod assembly and used for controlling the valve rod assembly to move along the length direction of the valve body, the first valve core and the second valve core are coaxially arranged at one end, far away from the opening and closing mechanism, of the valve rod assembly, and when the opening and closing mechanism controls the valve rod assembly to move, the edge of the first valve core and the edge of the second valve core can be respectively contacted with or separated from the first annular taper plate and the second annular taper plate in a sealing manner;
The double-seal high-temperature sealing valve comprises an opening and closing mechanism mounting part, wherein the opening and closing mechanism mounting part is connected with one end of the valve body, which is far away from the air inlet, the opening and closing mechanism is arranged in the opening and closing mechanism mounting part, the opening and closing mechanism comprises a control rod, and the control rod is connected with the valve rod assembly through a buffer mechanism;
the valve rod assembly comprises a first valve rod and a second valve rod, the second valve rod is sleeved outside the first valve rod, one end of the control rod is connected with the first valve rod through the buffer mechanism, the middle part of the first valve core is connected with the first valve rod, the middle part of the second valve core is connected with the second valve rod, the buffer mechanism comprises a first spring, a second spring and a connecting piece, the control rod is connected with the first valve rod through the connecting piece, the control rod is movable relative to the connecting piece, the first spring is arranged in the connecting piece and is positioned between the control rod and the first valve rod, the second spring is arranged between the connecting piece and the second valve rod, and the opposite ends of the second spring are respectively abutted with the end parts of the connecting piece and the second valve rod;
The connecting piece comprises a connecting sleeve, a movable piece and a connecting disc, one end of the movable piece is movably clamped in the connecting sleeve, the movable piece is connected with the control rod, the connecting disc is arranged at one end of the connecting sleeve, which is far away from the movable piece, the connecting disc is connected with the first valve rod, and the first spring is arranged between the movable piece and the connecting disc;
the connecting piece still includes the preforming, the preforming pass through adjusting screw with the adapter sleeve is connected, the second valve rod is close to buffer gear's tip is provided with the end cover, first valve rod pass the preforming with the end cover, the relative both ends of second spring respectively with the preforming reaches the end cover butt.
2. The dual seal high temperature seal valve of claim 1, wherein the opening and closing mechanism, the first annular cone plate, the second annular cone plate are configured to: when the valve rod assembly is controlled to move to the nearest position to the air inlet, the edge of the first valve core is in sealing contact with the first annular conical plate, the edge of the second valve core is in sealing contact with the second annular conical plate, and when the valve rod assembly is controlled to move in the direction away from the air inlet, the first valve core is separated from the first annular conical plate, and the second valve core is separated from the second annular conical plate.
3. The dual seal high temperature seal valve of claim 1, wherein the edge of the first spool is a first flange that mates with the first annular cone plate and the edge of the second spool is a second flange that mates with the second annular cone plate.
4. The dual seal high temperature seal valve of claim 1, wherein the valve body comprises a valve body, a valve seat and a guide seat which are sequentially connected, the guide seat is closer to the air inlet relative to the valve seat, and the first annular conical plate and the second annular conical plate are both arranged on the inner wall of the valve seat.
5. The double-seal high-temperature sealing valve according to claim 4, wherein a guide post installation part is arranged in the middle of the guide seat, a guide hole is arranged in the guide post installation part, a guide post is arranged in the middle of the first valve core, and the guide post penetrates through the guide hole.
6. The dual seal high temperature seal valve of claim 4, wherein the valve seat is provided with a gas seal channel, the first annular cone plate is in contact with the first valve element, the first annular cone plate, the second annular cone plate, the first valve element and the second valve element enclose a seal cavity when the second annular cone plate is in contact with the second valve element, and the gas seal channel is in communication with the seal cavity.
7. A high temperature combustible gas delivery system comprising a double seal high temperature seal valve as claimed in any one of claims 1 to 6.
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| CN201910241026.8A CN109838564B (en) | 2019-03-28 | 2019-03-28 | Double-seal high-temperature sealing valve and high-temperature combustible gas conveying system |
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| CN109838564A (en) | 2019-06-04 |
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