CN112178231A - Air bag sealed high-temperature high-pressure knife gate valve - Google Patents
Air bag sealed high-temperature high-pressure knife gate valve Download PDFInfo
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- CN112178231A CN112178231A CN202011162577.4A CN202011162577A CN112178231A CN 112178231 A CN112178231 A CN 112178231A CN 202011162577 A CN202011162577 A CN 202011162577A CN 112178231 A CN112178231 A CN 112178231A
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- 238000007789 sealing Methods 0.000 claims abstract description 74
- 238000007599 discharging Methods 0.000 claims abstract description 26
- 238000012423 maintenance Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims description 27
- 230000002457 bidirectional effect Effects 0.000 claims description 20
- 239000000945 filler Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 9
- 239000007789 gas Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000012856 packing Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0227—Packings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0281—Guillotine or blade-type valves, e.g. no passage through the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/16—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/36—Features relating to lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention relates to an air bag sealed high-temperature high-pressure knife gate valve, which comprises: the knife gate valve body mainly comprises a feeding body and a discharging body; the valve plate is arranged between the feeding body and the discharging body in a sliding mode; the piston rod of the cylinder is connected with the valve plate through a valve push rod and used for pushing the valve plate to reciprocate; the maintenance cavity shell is arranged outside the valve push rod, a first sealing cavity is formed between one part of the maintenance cavity shell and the outer wall of the feeding body, and the bottom end of the first sealing cavity is in open contact with the valve plate; the rear cavity shell is arranged on the other side opposite to the overhaul cavity shell, a second sealing cavity is formed between the rear cavity shell and the outer wall of the feeding body, and the bottom end of the second sealing cavity is in open contact with the valve plate; and the two air bags are respectively packaged in the first sealing cavity and the second sealing cavity. The invention is not only suitable for realizing the condition of quick opening and closing under high temperature and high pressure, but also has excellent sealing effect and is not easy to damage.
Description
Technical Field
The invention relates to a knife gate valve, in particular to an air bag sealed high-temperature high-pressure knife gate valve which is suitable for realizing the condition of quick opening and closing under high temperature and high pressure and has excellent sealing effect.
Background
At present, all large-caliber knife gate valves (namely knife gate valves with the caliber above DN 500) in the market have the defects that the requirements of bearing high temperature and high pressure and quick opening and closing within 5 seconds can not be met simultaneously. This is because the knife gate valves with the caliber above DN500 all have the following problems:
firstly, the temperature bearing capacity of the knife gate valve is 120 ℃ at most, the pressure bearing capacity of the knife gate valve is 0.6MPa at most, and the temperature bearing capacity and the pressure bearing capacity of the knife gate valve are lower and lower along with the increase of the caliber; secondly, the opening and closing characteristics of the knife gate valve are poor, the opening and closing time is longer when the caliber is larger, and quick opening and closing are difficult to realize; the sealing effect is not good and the sealing structure is easy to damage; fourthly, the service life of the valve plate push rod is short due to the influence of materials.
Due to the defects, the large-caliber knife gate valve cannot be quickly opened, closed and applied in some special fields, and cannot meet the use requirements under some special working conditions, so that the knife gate valve which can bear high temperature and high pressure, can be quickly opened, closed and has a good sealing effect is urgently needed.
Disclosure of Invention
In view of the above problems, the present invention aims to provide an air bag sealing type high-temperature and high-pressure knife gate valve, which is not only suitable for realizing the fast opening and closing condition under high temperature and high pressure, but also has excellent sealing effect and is not easy to damage.
In order to achieve the purpose, the invention adopts the following technical scheme: an air bag sealed high-temperature high-pressure knife gate valve, comprising: the knife gate valve body mainly comprises a feeding body and a discharging body, and a guide chute perpendicular to the material flow direction is formed between the feeding body and the discharging body; the valve plate is arranged in a guide sliding groove between the feeding body and the discharging body in a sliding mode and used for opening and closing a feeding hole between the feeding body and the discharging body; a piston rod of the bidirectional linear cylinder is connected with the valve plate through a valve push rod and used for pushing the valve plate to reciprocate along the guide sliding chute; the maintenance cavity shell is arranged outside the valve push rod to surround the valve push rod inside the maintenance cavity shell, the lower part of one side, adjacent to the knife gate valve body, of the maintenance cavity shell is connected with the outer wall of the material discharging body in a sealing mode, a first sealing cavity is formed between the upper part of the same side of the maintenance cavity shell and the outer wall of the material feeding body after being bent downwards, and the bottom end of the first sealing cavity is in open contact with the valve plate; the rear cavity shell is arranged on the other side opposite to the overhaul cavity shell, the lower part of one side, adjacent to the knife gate valve body, of the rear cavity shell is connected with the outer wall of the material discharging body in a sealing mode, the upper part of the same side of the rear cavity shell is bent downwards and then forms a second sealing cavity with the outer wall of the material feeding body, and the bottom end of the second sealing cavity is in open contact with the valve plate; and the air bags are respectively packaged in the first sealing cavity and the second sealing cavity, and air nozzles of the air bags are connected with an external air source.
The air bag sealed high-temperature and high-pressure knife gate valve preferably further comprises a supporting shell, the supporting shell surrounds the valve push rod and the outside of the piston rod of the bidirectional linear cylinder, one end of the supporting shell is connected with the end plate on the other side of the overhaul cavity shell, and the cylinder body of the bidirectional linear cylinder is fixed to the outside of the other end of the supporting shell.
The air bag sealed high-temperature and high-pressure knife gate valve is characterized in that a sealing cover is preferably arranged outside the end plate on the other side of the overhaul cavity shell, a filler is sealed in the sealing cover, one end of a valve push rod is connected with the valve plate, and the other end of the valve push rod sequentially penetrates through the end plate on the other side of the overhaul cavity shell, the filler and the sealing cover and then is connected with a piston rod of the bidirectional linear cylinder.
Preferably, the other end of the valve push rod is connected with a piston rod of the bidirectional linear cylinder through a connecting piece, and the diameter of the connecting piece is larger than that of the valve push rod and the piston rod.
The air bag sealed high-temperature and high-pressure knife gate valve is characterized in that an access hole is preferably formed in the bottom of the access cavity shell, and an access cover is detachably mounted on the access hole.
The air bag sealed high-temperature and high-pressure knife gate valve is characterized in that a rear end cover is detachably mounted on the other side of the rear cavity shell, and a first sealing element is arranged at the joint of the rear end cover and the rear cavity shell.
The air bag sealed high-temperature and high-pressure knife gate valve is characterized in that the first sealing cavity and the second sealing cavity are of right-angled trapezoid structures with upper ends and lower ends open, air bag cover plates are arranged at the upper ends of the first sealing cavity and the second sealing cavity, one ends of the air bag cover plates are fixedly connected with the outer wall of the material inlet body, the other ends of the air bag cover plates are fixedly connected with the overhaul cavity shell and the rear cavity shell respectively, and second sealing parts are arranged at the joints of the air bag cover plates and the overhaul cavity shell and the rear cavity shell.
In the airbag-sealed high-temperature and high-pressure knife gate valve, a third sealing element is preferably embedded in the upper edge of the material discharging body, so that the material discharging body and the valve plate form a sealing effect at a contact interface of the material discharging body and the valve plate.
Due to the adoption of the technical scheme, the invention has the following advantages: 1. the invention has simple structure, low manufacturing cost and convenient operation, and can be automatically controlled in the whole process. 2. The air bag can bear good sealing effect under the conditions of high temperature and high pressure because of the special material and the capability of being filled with different pressure gases. 3. The invention avoids the friction between the air bag and the valve plate because the air bag is almost not contacted with the valve plate in the moving process of the valve plate, thereby greatly prolonging the service life. 4. The valve plate of the invention has no contact with the air bag in motion, and the friction force between the valve push rod and the maintenance cavity shell is very small under the action of the filler, so that the valve plate can be quickly opened and closed under the action of the thrust of the cylinder. 5. The friction force generated in the movement of the valve plate is small, so that the requirements on the thrust and the power of the used power source cylinder are lower, the cost is low, the power is small, the energy consumption is low, and the energy is saved. 6. The piston rod of the automatic gate valve can not enter the interior of the knife gate valve body all the time, so that the pollution of materials for opening the automatic gate valve body to the piston rod can be effectively avoided, the piston rod is effectively protected, and the service life of the piston rod is prolonged.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic top view of the present invention;
fig. 3 is a partially enlarged view of the portion a of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the system 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. Furthermore, the terms "first," "second," "third," and the like are used to define elements only for convenience in distinguishing between the elements, and if not otherwise stated, are not to be construed as indicating or implying any relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings 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 to 3, the present invention provides an air bag sealed high-temperature high-pressure knife gate valve, comprising: the knife gate valve body 17 mainly comprises a feeding body 171 and a discharging body 172, and a guide chute perpendicular to the material flow direction is formed between the feeding body 171 and the discharging body 172; a valve plate 9 slidably disposed in the guide chute between the feeding body 171 and the discharging body 172 for opening and closing the feeding port between the feeding body 171 and the discharging body 172; a piston rod 2 of the bidirectional linear cylinder 1 is connected with a valve plate 9 through a valve push rod 4 and is used for pushing the valve plate 9 to reciprocate along a guide sliding chute; the maintenance cavity shell 18 is arranged outside the valve push rod 4 to surround the valve push rod 4 inside, the lower part of one side, adjacent to the knife gate valve body 17, of the maintenance cavity shell 18 is connected with the outer wall of the discharging body 172 in a sealing mode, the upper part of the same side of the maintenance cavity shell 18 is bent downwards to form a first sealing cavity with the outer wall of the feeding body 171, and the bottom end of the first sealing cavity is in open contact with the valve plate 9; the rear cavity shell 19 is arranged on the other side opposite to the overhaul cavity shell 18, the lower part of one side, adjacent to the knife gate valve body 17, of the rear cavity shell 19 is connected with the outer wall of the discharging body 172 in a sealing mode, the upper part of the same side of the rear cavity shell 19 is bent downwards and then forms a second sealing cavity with the outer wall of the feeding body 171, and the bottom end of the second sealing cavity is in open contact with the valve plate 9; the air bags 12 are respectively packaged in the first sealing cavity and the second sealing cavity, and air nozzles 16 of the two air bags 12 are connected with an external air source.
In the above embodiment, preferably, the airbag-sealed high-temperature and high-pressure knife gate valve further comprises a support housing 7, the support housing 7 surrounds the valve push rod 4 and the piston rod 2 of the bidirectional linear cylinder 1, one end of the support housing 7 is connected with the other end plate of the service chamber housing 18, and the cylinder body of the bidirectional linear cylinder 1 is fixed outside the other end of the support housing 7.
In the above embodiment, preferably, a sealing cover 5 is arranged outside the other end plate of the service chamber housing 18, a packing 6 is sealed in the sealing cover 5, one end of the valve push rod 4 is connected with the valve plate 9, the other end of the valve push rod 4 passes through the other end plate of the service chamber housing 18, the packing 6 and the sealing cover 5 in sequence and then is connected with the piston rod 2 of the bidirectional linear cylinder 1, and the packing 6 is used for reducing friction between the valve push rod 4 and the service chamber housing 18 in the reciprocating motion.
In the above embodiment, preferably, the other end of the valve push rod 4 is connected with the piston rod 2 of the bidirectional linear cylinder 1 through the connecting piece 3, and the diameter of the connecting piece 3 is larger than the diameters of the valve push rod 4 and the piston rod 2, so as to limit the stroke of the valve push rod 4, and prevent the piston rod 2 of the bidirectional linear cylinder 1 from entering the inside of the knife gate valve body 17, so that the piston rod 2 is not polluted by the material, and the influence on the piston rod 2 is effectively avoided, thereby prolonging the service life.
In the above embodiment, preferably, the bottom of the service chamber housing 18 is provided with a service hole, the service hole is detachably provided with the service cover 8, and the equipment can be serviced through the service hole by removing the service cover.
In the above embodiment, preferably, the rear cover 11 is detachably mounted on the other side of the rear cavity housing 19, and the first sealing member 10 is disposed at the junction of the rear cover 11 and the rear cavity housing 19.
In the above embodiment, preferably, the first sealing cavity and the second sealing cavity are both in a right-angled trapezoid structure with an upper end and a lower end open, and the upper ends of the first sealing cavity and the second sealing cavity are both provided with the airbag cover plate 13, one end of each of the two airbag cover plates 13 is fixedly connected with the outer wall of the feeding body 171, the other end of each of the two airbag cover plates 13 is fixedly connected with the maintenance cavity housing 18 and the rear cavity housing 19 respectively, and the joints of the two airbag cover plates 13 with the maintenance cavity housing 18 and the rear cavity housing 19 are both provided with the second sealing member 14.
In the above embodiment, it is preferable that the third sealing member 15 is embedded in the upper edge of the discharging body 172, so that the discharging body 172 and the valve plate 9 form a sealing function at the contact interface therebetween.
When the invention is used, the working process is as follows:
when the materials do not need to pass through the knife gate valve body 17 (namely, when the knife gate valve body 17 is turned off), the bidirectional linear cylinder 1 is led in gas at the moment so as to extend the piston rod 2, so that the valve plate 9 in the overhaul cavity shell 18 moves linearly until the feed port is sealed, and then the bidirectional linear cylinder stops moving, an external gas source is started so as to enable clean air to enter the air bag 12, so that the air bag 12 deforms and expands, and is tightly attached to the feed body 171, the discharge body 172, the overhaul cavity shell 18, the rear cavity shell 19 and the valve plate 9 to form a sealing effect, so that a contact interface between the feed body 171 and the valve plate 9 is tightly sealed, the sealing effect of the sealing form is good, high temperature and high pressure can be borne, and when the pressure required by the working condition of a use environment is high, the pressure of the gas filled in the air bag 12 can; meanwhile, in the movement process of the valve plate 9, the air bag 12 is not inflated, and the size is small, so that the air bag is almost not in contact with the moving valve plate 9, the friction between the air bag 12 and the valve plate 9 is avoided, and the service life of the air bag 12 is prolonged; and because there is not serious close contact between valve plate 9 and the body 17 of the knife gate valve, the valve push rod 14 has reduced the friction with examining and repairing the cavity shell 18 under the lubricating action of the packing 6, therefore the valve plate 9 can realize the fast movement through the function of the two-way straight line cylinder 1, thus make the body 17 of the knife gate valve realize the fast closing.
When the material is required to be discharged from the discharging body 172 through the feeding body 171 (i.e. when the knife gate valve body 17 is opened), firstly, the gas in the air bag 12 is discharged through the air tap 16, then the bidirectional linear cylinder 1 is reversely charged so as to contract the piston rod 2, and the contraction is stopped until the valve plate 9 completely enters the inspection cavity shell 18, so that the knife gate valve body 17 is opened, and the material is discharged from the discharging body 172 through the feeding body 171. In the contraction process of the valve push rod 14, the friction between the valve push rod 14 and the overhaul cavity shell 18 is reduced under the lubricating action of the filler 6, so that the valve plate 9 can rapidly move under the action of the bidirectional linear cylinder 1, and the knife gate valve body 17 is rapidly opened; meanwhile, in the contraction process of the valve push rod 14, because the gas in the air bag 12 is exhausted, the volume of the air bag 12 is small enough to be almost not contacted with the valve plate 9, the friction between the air bag 12 and the valve plate 9 is avoided, and the service life of the air bag 12 is prolonged.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides an air bag sealed high temperature high pressure knife gate valve which characterized in that includes:
the knife gate valve body (17) mainly comprises a material inlet body (171) and a material outlet body (172), and a guide chute perpendicular to the material flow direction is formed between the material inlet body (171) and the material outlet body (172);
the valve plate (9) is arranged in a guide sliding groove between the feeding body (171) and the discharging body (172) in a sliding mode and is used for opening and closing a feeding hole between the feeding body (171) and the discharging body (172);
the piston rod (2) of the bidirectional linear cylinder (1) is connected with the valve plate (9) through a valve push rod (4) and used for pushing the valve plate (9) to reciprocate along the guide sliding groove;
the maintenance cavity shell (18) is arranged outside the valve push rod (4) so as to surround the valve push rod (4) inside the maintenance cavity shell, the lower part of one side, adjacent to the knife gate valve body (17), of the maintenance cavity shell (18) is connected with the outer wall of the material outlet body (172) in a sealing mode, a first sealing cavity is formed between the upper part of the same side of the maintenance cavity shell (18) and the outer wall of the material inlet body (171) after being bent downwards, and the bottom end of the first sealing cavity is in open contact with the valve plate (9);
the rear cavity shell (19) is arranged on the other side opposite to the overhaul cavity shell (18), the lower part of one side, adjacent to the knife gate valve body (17), of the rear cavity shell (19) is connected with the outer wall of the material discharging body (172) in a sealing mode, a second sealing cavity is formed between the upper part of the same side of the rear cavity shell (19) and the outer wall of the material feeding body (171) after the upper part of the same side of the rear cavity shell is bent downwards, and the bottom end of the second sealing cavity is in open contact with the valve plate (9);
and the air bags (12) are respectively packaged in the first sealing cavity and the second sealing cavity, and the air nozzles (16) of the air bags (12) are connected with an external air source.
2. The airbag-sealed high-temperature and high-pressure knife gate valve according to claim 1, characterized by further comprising a support housing (7), wherein the support housing (7) is enclosed outside the valve push rod (4) and the piston rod (2) of the bidirectional linear cylinder (1), one end of the support housing (7) is connected with the other end plate of the service chamber housing (18), and the cylinder body of the bidirectional linear cylinder (1) is fixed outside the other end of the support housing (7).
3. The air bag sealed high-temperature and high-pressure knife gate valve according to claim 1, characterized in that a sealing cover (5) is arranged outside the other end plate of the maintenance cavity housing (18), a filler (6) is sealed in the sealing cover (5), one end of the valve push rod (4) is connected with the valve plate (9), and the other end of the valve push rod (4) is connected with the piston rod (2) of the bidirectional linear cylinder (1) after sequentially passing through the other end plate of the maintenance cavity housing (18), the filler (6) and the sealing cover (5).
4. The air bag sealed high-temperature high-pressure knife gate valve according to claim 1, characterized in that the other end of the valve push rod (4) is connected with the piston rod (2) of the bidirectional linear cylinder (1) through a connecting piece (3), and the diameter of the connecting piece (3) is larger than the diameters of the valve push rod (4) and the piston rod (2).
5. The air bag sealed high-temperature and high-pressure knife gate valve according to any one of claims 1 to 4, characterized in that an access hole is formed in the bottom of the access chamber shell (18), and an access cover (8) is detachably mounted on the access hole.
6. The airbag-sealed high-temperature and high-pressure knife gate valve according to any one of claims 1 to 4, characterized in that a rear end cover (11) is detachably mounted on the other side of the rear cavity housing (19), and a first sealing member (10) is arranged at the joint of the rear end cover (11) and the rear cavity housing (19).
7. The air bag sealed high-temperature and high-pressure knife gate valve according to any one of claims 1 to 4, wherein the first sealing cavity and the second sealing cavity are of right-angle trapezoidal structures with upper ends and lower ends open, air bag cover plates (13) are arranged at the upper ends of the first sealing cavity and the second sealing cavity, one ends of the two air bag cover plates (13) are fixedly connected with the outer wall of the material inlet body (171), the other ends of the two air bag cover plates (13) are fixedly connected with the service cavity shell (18) and the rear cavity shell (19) respectively, and second sealing elements (14) are arranged at the joints of the two air bag cover plates (13) with the service cavity shell (18) and the rear cavity shell (19).
8. The airbag-sealed high-temperature and high-pressure knife gate valve according to any one of claims 1 to 4, characterized in that a third sealing member (15) is embedded in the upper edge of the material-discharging body (172), so that the material-discharging body (172) and the valve plate (9) form a sealing function at the contact interface therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011162577.4A CN112178231A (en) | 2020-10-27 | 2020-10-27 | Air bag sealed high-temperature high-pressure knife gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011162577.4A CN112178231A (en) | 2020-10-27 | 2020-10-27 | Air bag sealed high-temperature high-pressure knife gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112178231A true CN112178231A (en) | 2021-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011162577.4A Pending CN112178231A (en) | 2020-10-27 | 2020-10-27 | Air bag sealed high-temperature high-pressure knife gate valve |
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| CN (1) | CN112178231A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113743491A (en) * | 2021-08-27 | 2021-12-03 | 广东电网有限责任公司 | Monitoring method, monitoring device and monitoring system for closing state of grounding knife switch |
Citations (11)
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| CN206682338U (en) * | 2017-04-24 | 2017-11-28 | 福建捷斯特阀门制造有限公司 | A kind of tilted back type formula ceramics double-gate plate valve |
| CN213451788U (en) * | 2020-10-27 | 2021-06-15 | 北京洁绿环境科技股份有限公司 | Air bag sealed high-temperature high-pressure knife gate valve |
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| CN113743491A (en) * | 2021-08-27 | 2021-12-03 | 广东电网有限责任公司 | Monitoring method, monitoring device and monitoring system for closing state of grounding knife switch |
| CN113743491B (en) * | 2021-08-27 | 2024-02-27 | 广东电网有限责任公司 | Monitoring method, monitoring device and monitoring system for closing state of grounding disconnecting link |
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