CN117570217A - Double-channel parallel double-flashboard gate valve - Google Patents
Double-channel parallel double-flashboard gate valve Download PDFInfo
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- CN117570217A CN117570217A CN202410062864.XA CN202410062864A CN117570217A CN 117570217 A CN117570217 A CN 117570217A CN 202410062864 A CN202410062864 A CN 202410062864A CN 117570217 A CN117570217 A CN 117570217A
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- valve
- valve seat
- sleeve
- assembly
- flow channel
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- 238000002955 isolation Methods 0.000 claims abstract description 16
- 230000000712 assembly Effects 0.000 claims abstract description 8
- 238000000429 assembly Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 56
- 238000012856 packing Methods 0.000 claims description 30
- 230000006835 compression Effects 0.000 claims description 18
- 238000007906 compression Methods 0.000 claims description 18
- 210000004907 gland Anatomy 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 5
- 230000009977 dual effect Effects 0.000 claims 9
- 239000000945 filler Substances 0.000 claims 1
- 239000001307 helium Substances 0.000 abstract description 46
- 229910052734 helium Inorganic materials 0.000 abstract description 46
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract description 46
- 239000002826 coolant Substances 0.000 abstract description 18
- 125000006850 spacer group Chemical group 0.000 abstract description 10
- 239000007789 gas Substances 0.000 abstract description 9
- 238000001816 cooling Methods 0.000 description 5
- 230000011218 segmentation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- F16K3/0209—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 the valve having a particular passage, e.g. provided with a filter, throttle or safety device
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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
-
- 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
- F16K3/18—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 by movement of the closure 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
- 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
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
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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)
- Sliding Valves (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a double-channel parallel double-flashboard gate valve, belongs to the technical field of nuclear power valves, and aims to solve the problem of how to intercept a medium in a helium coolant loop pipeline of a high-temperature gas cooled reactor. The valve body is internally provided with an inner valve seat assembly and an outer valve seat which are sleeved inside and outside, the medium inlet and the medium outlet of the valve body are respectively internally provided with a main inner hole, the main inner hole is internally provided with a spacer bush, when the valve is opened, the valve plate valve clack assembly is respectively abutted against and sealed with the outer valve seats at two sides, the spacer bush is respectively abutted against and sealed with the inner valve seat assemblies at two sides, and two sides of the spacer bush form independent hot end flow channels and cold end flow channels; because the medium pressure in the helium hot-end flow channel and the medium pressure in the helium cold-end flow channel are similar, the isolation sleeve and the inner valve seat assembly only need to resist high temperature, and the valve body only needs to resist high pressure, so that the limitation of a high-temperature high-pressure helium coolant is greatly relieved, and the coolant loop pipeline can be rapidly cut off when the coolant loop pipeline is broken or the steam generator is broken.
Description
Technical Field
The invention belongs to the technical field of nuclear power valves, and particularly relates to a double-channel parallel double-flashboard gate valve.
Background
The nuclear power unit is a basic power generation unit composed of a nuclear reactor and facilities such as a matched turbine generator, and the like, and currently, a nuclear power reactor type technology has been developed to a fourth generation high temperature gas cooled reactor technology. The high-temperature gas cooled reactor takes helium as a coolant, low-temperature helium flows between fuel bodies to become high-temperature helium, the high-temperature helium releases heat through the steam generator, medium water is changed into high-temperature steam, and the high-temperature steam drives the turbine generator to generate power.
The high temperature gas cooled reactor and the steam generator are connected through a helium cold end pipeline and a hot end pipeline to form a coolant loop, the cold end pipeline is filled with low temperature helium with the pressure of 7.9-8.1 MPa and the temperature of 250 ℃, the low temperature helium flows through the fuel body to absorb heat to form high temperature helium with the pressure of 8.1MPa and the temperature of 750 ℃, and the high temperature helium flows back to the steam generator through the hot end pipeline with the inner diameter of more than 700 mm.
The temperature and pressure of helium coolant are limited to exceed the design upper limit of conventional valves, and no valve is arranged on a coolant loop pipeline of the high-temperature gas cooled reactor nuclear power unit. Once the helium gas coolant loop pipeline or the steam generator is broken and the steam loop of the nuclear power unit is in water loss accident, the helium gas coolant loop pipeline cannot be cut off rapidly, and a large amount of medium is lost.
Disclosure of Invention
The invention aims to provide a double-channel parallel double-flashboard gate valve, which is used for solving the problem that a valve is not installed on a helium coolant loop pipeline of a high-temperature gas cooled reactor nuclear power unit. Once the helium coolant loop pipe is broken or the steam generator is broken, the helium coolant loop pipe cannot be cut off rapidly, and a large amount of medium loss is caused. The technical scheme adopted by the invention is as follows:
a double-channel parallel double-flashboard gate valve comprises a valve body, a valve rod and a valve cover; the valve body is provided with a valve cavity, a medium inlet, a medium outlet and a stop control port of the valve body are communicated through the valve cavity, an inner valve seat assembly and an outer valve seat which are sleeved inside and outside are arranged in the medium inlet and the medium outlet respectively, a first high-temperature flow passage is formed in the inner valve seat assembly in the medium inlet, a first low-temperature flow passage is formed between the inner valve seat assembly in the medium inlet and the outer valve seat, a third high-temperature flow passage is formed in the inner valve seat assembly in the medium outlet, a third low-temperature flow passage is formed between the inner valve seat assembly in the medium outlet and the outer valve seat, a valve cover seals the stop control port, the lower end of a valve rod penetrates through the valve cover and is connected with a flashboard valve clack assembly, the valve rod is in sliding sealing fit with the valve cover through a packing assembly, a hydraulic cylinder is connected with the valve cover through a bracket, a piston rod of the hydraulic cylinder is connected with the upper end of the valve rod through a coupler, a main inner hole is arranged on the flashboard valve clack assembly, a spacer sleeve is arranged in the main inner hole, a second high-temperature flow passage is formed in the spacer sleeve, and a second low-temperature flow passage is formed between the spacer sleeve and the main inner hole;
when the valve is opened, two end surfaces of the flashboard valve clack assembly are respectively abutted and sealed with the two outer valve seats, two end surfaces of the isolation sleeve are respectively abutted and sealed with the two inner valve seat assemblies, the first low-temperature flow channel, the second low-temperature flow channel and the third low-temperature flow channel are sequentially communicated, and the first high-temperature flow channel, the second high-temperature flow channel and the third high-temperature flow channel are sequentially communicated; when the valve is closed, the hydraulic cylinder drives the flashboard valve clack assembly to slide downwards through the valve rod, two end faces of the flashboard valve clack assembly respectively abut against and seal with the inner valve seat assemblies and the two outer valve seats on two sides, and the first high-temperature flow channel, the first low-temperature flow channel, the third high-temperature flow channel and the third low-temperature flow channel are closed.
Further, the inner valve seat assembly comprises a supporting inner sleeve and an inner valve seat body, the supporting inner sleeve and the inner valve seat body are coaxially aligned, a plurality of first compression springs are arranged between the supporting inner sleeve and the inner valve seat body, the supporting inner sleeve and the inner valve seat body are in sealing connection through a first corrugated pipe, a first supporting sleeve is sleeved on the periphery of the supporting inner sleeve, the supporting inner sleeve is connected with the first supporting sleeve through a plurality of rib structures, a flowing space is formed between the supporting inner sleeve and the first supporting sleeve, and the periphery of the first supporting sleeve is in matched connection with a corresponding medium inlet or medium outlet.
Further, a second supporting sleeve is arranged in the outer valve seat, the second supporting sleeve is connected with the outer valve seat through a plurality of rib structures, a flowing space is formed between the second supporting sleeve and the outer valve seat, and the outer periphery of the inner valve seat body is in sliding fit with the inner periphery of the corresponding second supporting sleeve.
Further, the two sides of the valve cavity are respectively provided with a sliding groove, the two sides of the flashboard valve clack assembly are respectively provided with sliding strips, and the two sliding strips are vertically matched with the two sliding grooves in a one-to-one correspondence manner.
Further, the valve cover and the valve body are in sealing connection through a sealing ring and a winding gasket.
Further, a stuffing box is arranged on the valve cover, the stuffing assembly is arranged in the stuffing box, the stuffing gland is connected with the valve cover through a plurality of connecting bolts, and the stuffing assembly is pressed on the bottom surface of the stuffing box by the stuffing gland.
Further, the connecting bolt is sleeved with the bushing, the bushing is sleeved with the disc spring group, one end of the connecting bolt penetrates through the flange hole in the packing gland to be connected with the valve cover, the bushing is in sliding fit with the flange hole of the packing gland, the other end of the connecting bolt is provided with the connecting nut, the upper end of the bushing is provided with the flange structure, and the connecting nut presses the disc spring group on the packing gland through the flange structure.
Further, the packing assembly is formed by sequentially superposing a first formed graphite packing set, a spacing ring, a second formed graphite packing set and a packing seat ring from top to bottom.
Further, the flashboard valve clack subassembly includes two main seal body structures of bilateral symmetry, is equipped with the segmentation hole on the main seal body structure, be equipped with interior body seal structure in the segmentation hole, interior body seal structure links to each other through a plurality of rib structures with corresponding main seal body structure, and two interior body seal structure axial alignment, two interior body seal structure pass through second bellows sealing connection, and two interior body seal structure and second bellows constitute the spacer sleeve, and the segmentation hole axial alignment of two main seal body structures constitutes the main hole is equipped with a plurality of second compression springs between two main seal body structures, and two main seal body structures link to each other through a plurality of locating pins.
Further, the plurality of second compression springs form two groups of spring groups which are circumferentially and uniformly arranged, wherein one group of spring groups is coaxial with the two outer valve seats when the valve is opened, and the other group of spring groups is coaxial with the two outer valve seats when the valve is closed.
Compared with the prior art, the invention has the beneficial effects that:
the invention simultaneously controls the on-off of the cold end pipeline and the hot end pipeline of the helium cooling loop of the high-temperature gas-cooled reactor nuclear power unit, when the valve is opened, the first low-temperature runner, the second low-temperature runner and the third low-temperature runner are sequentially communicated to form the helium cold end runner, the first high-temperature runner, the second high-temperature runner and the third high-temperature runner are sequentially communicated to form the helium hot end runner, the helium hot end runner and the helium cold end runner form an inner-outer sleeved relationship, high-temperature helium with the pressure of 8.1MPa and the temperature of 750 ℃ circulates in the helium hot end runner, low-temperature helium with the pressure of 7.9-8.1 MPa and the temperature of 250 ℃ circulates in the helium cold end runner, the medium pressure in the helium hot end runner is similar to that in the helium cold end runner, and the isolation sleeve and the inner valve seat component only need to resist high temperature, the limitation of the high-temperature high-pressure helium cooling loop is greatly relieved, the gate valve provided by the invention can realize that the helium cooling loop is broken in the helium cooling loop pipeline or the steam generator and the steam cooling loop of the nuclear power unit is cut off, and the loss of the medium is avoided.
Drawings
FIG. 1 is a front cross-sectional view of the present invention;
FIG. 2 is a left side cross-sectional view of the present invention;
FIG. 3 is an enlarged view at A of FIG. 1;
FIG. 4 is an enlarged view at B of FIG. 2;
FIG. 5 is a cross-sectional view of an outer valve seat;
FIG. 6 is a left side view of the outer valve seat;
FIG. 7 is a cross-sectional view of the inner valve seat assembly;
FIG. 8 is a left side view of the inner valve seat assembly;
FIG. 9 is a cross-sectional view of a gate valve flap assembly;
FIG. 10 is a left side view of the gate valve flap assembly;
fig. 11 is a schematic structural view of the valve body.
In the drawings, 1, 2, outer valve seat, 3, chute, 4, inner valve seat assembly, 5, valve flap assembly, 6, valve cover, 7, packing assembly, 8, packing gland, 9, valve stem, 10, bracket, 11, hydraulic cylinder, 12, coupler, 13, winding gasket, 14, sealing ring, 15, connecting bolt, 16, packing seat, 17, second molded graphite packing set, 18, spacer ring, 19, disc spring set, 20, bushing, 21, connecting nut, 22, second support sleeve, 23, first bellows, 24, inner valve seat body, 25, support inner sleeve, 26, first support sleeve, 27, first compression spring, 28, second compression spring, 29, second bellows, 30, main seal structure, 31, inner tube seal structure, 32, locating pin, 33, slide bar, 34, valve cavity, 35, medium inlet, 36, medium outlet, 37, stop control port, 38.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The connection mentioned in the invention is divided into fixed connection and detachable connection, wherein the fixed connection is a conventional fixed connection mode such as folding connection, rivet connection, bonding connection, welding connection and the like, the detachable connection comprises a conventional detachable mode such as bolt connection, buckle connection, pin connection, hinge connection and the like, and when a specific connection mode is not limited, at least one connection mode can be found in the conventional connection mode by default to realize the function, and the person skilled in the art can select the function according to the needs. For example: the fixed connection is welded connection, and the detachable connection is bolted connection.
The present invention will be described in further detail below with reference to the accompanying drawings, the following examples being illustrative of the present invention and the present invention is not limited to the following examples.
Examples: as shown in fig. 1-11, a double-channel parallel double-gate valve comprises a valve body 1, a valve rod 9 and a valve cover 6; the valve body 1 is provided with a valve cavity 34, a medium inlet 35, a medium outlet 36 and a stop control port 37 of the valve body 1 are communicated through the valve cavity 34, an inner valve seat assembly 4 and an outer valve seat 2 which are sleeved inside and outside are arranged in the medium inlet 35 and the medium outlet 36, a first high-temperature flow channel is formed in the inner valve seat assembly 4 in the medium inlet 35, a first low-temperature flow channel is formed between the inner valve seat assembly 4 in the medium inlet 35 and the outer valve seat 2, a third high-temperature flow channel is formed in the inner valve seat assembly 4 in the medium outlet 36, a third low-temperature flow channel is formed between the inner valve seat assembly 4 in the medium outlet 36 and the outer valve seat 2, the valve cover 6 seals the stop control port 37, the lower end of the valve rod 9 penetrates through the valve cover 6 and is connected with the valve disc assembly 5, the valve rod 9 is in sliding sealing fit with the valve cover 6 through a packing assembly 7, a piston rod of the hydraulic cylinder 11 is connected with the valve cover 6 through a support 10, a piston rod of the hydraulic cylinder 11 is connected with the upper end of the valve rod 9 through a coupling 12, a main inner hole is arranged on the valve disc assembly 5, an isolation sleeve 38 is arranged in the main inner hole, the isolation sleeve 38 is connected with the main hole through an isolation rib 38, the main hole is connected with the main hole through an isolation sleeve 38, and a plurality of low-temperature isolation sleeve 38 is formed between the main hole and the second high-temperature isolation sleeve 38 through a plurality of isolation sleeve structures;
when the valve is opened, a piston rod of the hydraulic cylinder 11 is retracted, two end surfaces of the flashboard valve clack assembly 5 are respectively abutted and sealed with the two outer valve seats 2, two end surfaces of the isolation sleeve 38 are respectively abutted and sealed with the two inner valve seat assemblies 4, the first low-temperature flow channel, the second low-temperature flow channel and the third low-temperature flow channel are sequentially communicated, and the first high-temperature flow channel, the second high-temperature flow channel and the third high-temperature flow channel are sequentially communicated; when the valve is closed, a piston rod of the hydraulic cylinder 11 extends out, the hydraulic cylinder 11 drives the flashboard valve clack assembly 5 to slide downwards through the valve rod 9, two end faces of the flashboard valve clack assembly 5 respectively abut against and seal the two inner valve seat assemblies 4 and the two outer valve seats 2, and the first high-temperature flow channel, the first low-temperature flow channel, the third high-temperature flow channel and the third low-temperature flow channel are closed.
The invention simultaneously controls the on-off of the cold end pipeline and the hot end pipeline of the helium coolant loop of the high-temperature gas cooled reactor nuclear power unit, when the valve is opened, the first low-temperature runner, the second low-temperature runner and the third low-temperature runner are sequentially communicated to form the helium cold end runner, the first high-temperature runner, the second high-temperature runner and the third high-temperature runner are sequentially communicated to form the helium hot end runner, the helium hot end runner and the helium cold end runner form an inner-outer sleeved relationship, high-temperature helium with the pressure of 8.1MPa and the temperature of 750 ℃ circulates in the helium hot end runner, low-temperature helium with the pressure of 7.9-8.1 MPa and the temperature of 250 ℃ circulates in the helium cold end runner, the medium pressure in the helium hot end runner is similar to that in the helium cold end runner, the isolation sleeve 38 and the inner valve seat component 4 only need to resist high temperature, the valve body 1 only needs to resist high pressure, the limitation of the high-temperature high-pressure helium coolant loop is greatly relieved, the gate valve provided by the invention is realized, and the rapid loss of the coolant loop can be avoided when the helium coolant loop pipeline or the nuclear power generator steam generator breaks and the steam generator cuts off the steam loop, and the large loss of the coolant loop occurs.
The inner valve seat assembly 4 comprises a support inner sleeve 25 and an inner valve seat body 24, the support inner sleeve 25 and the inner valve seat body 24 are coaxially aligned, a plurality of first compression springs 27 are arranged between the support inner sleeve 25 and the inner valve seat body 24, the support inner sleeve 25 and the inner valve seat body 24 are in sealing connection through a first corrugated pipe 23, a first support sleeve 26 is sleeved on the periphery of the support inner sleeve 25, the support inner sleeve 25 is connected with the first support sleeve 26 through a plurality of rib structures, a flowing space is formed between the support inner sleeve 25 and the first support sleeve 26, and the periphery of the first support sleeve 26 is in matched connection with a corresponding medium inlet 35 or medium outlet 36. The first supporting sleeve 26 is matched with the corresponding spigot of the medium inlet 35 or the medium outlet 36 and is firmly welded, the accurate positioning of the supporting inner sleeve 25 is realized, the supporting inner sleeve 25 provides thrust to the inner valve seat body 24 towards the valve cavity 34 through a plurality of first compression springs 27, the inner valve seat assembly 4 and the isolating sleeve 38 are convenient to compress and seal, the supporting inner sleeve 25 and the inner valve seat body 24 are in sealed connection through the first corrugated pipe 23, the first corrugated pipe 23 is used for compensating the displacement between the supporting inner sleeve 25 and the inner valve seat body 24, the effective sealing can be obtained when the axial distance between the supporting inner sleeve 25 and the inner valve seat body 24 is changed, the first corrugated pipe 23 has elasticity and can isolate the medium of the inner channel and the outer channel, the medium pressure of the hot end flow channel is higher than the medium pressure of the cold end flow channel (the pressure loss caused by the medium flowing in the steam generator), the size designed by the sealing surface pitch diameter of the inner valve seat body 24 is small, the effective acting diameter of the first corrugated pipe 23 is large, and the medium pressure difference of the cold end flow channel acts on the sealing surface of the inner valve seat body 24 to the effective acting on the ring of the effective diameter of the first corrugated pipe 23 to form a circular thrust medium area of the sealing surface of the inner valve seat body 24. Together with the spring force of the first plurality of compression springs 27, as the specific sealing pressure of the sealing surface of the inner valve seat assembly 4.
The outer valve seat 2 is internally provided with a second supporting sleeve 22, the second supporting sleeve 22 is connected with the outer valve seat 2 through a plurality of rib structures, a flowing space is formed between the second supporting sleeve 22 and the outer valve seat 2, and the outer periphery of the inner valve seat body 24 is in sliding fit with the inner periphery of the corresponding second supporting sleeve 22. The second support sleeve 22 is used to provide guidance for axial movement of the inner valve seat body 24.
The two sides of the valve cavity 34 are respectively provided with a sliding groove 3, the two sides of the flashboard valve clack assembly 5 are respectively provided with sliding strips 33, and the two sliding strips 33 are in one-to-one vertical sliding fit with the two sliding grooves 3 to provide guidance for the vertical movement of the flashboard valve clack assembly 5.
The valve cover 6 and the valve body 1 are in sealing connection through the sealing ring 14 and the winding gasket 13, the sealing ring 14 is a C-shaped sealing ring, and the valve cover 6 and the valve body 1 are in double sealing through the sealing ring 14 and the winding gasket 13 so as to ensure stable and reliable sealing.
The valve cover 6 is provided with a stuffing box, the stuffing assembly 7 is arranged in the stuffing box, the stuffing gland 8 is connected with the valve cover 6 through a plurality of connecting bolts 15, and the stuffing gland 8 presses the stuffing assembly 7 on the bottom surface of the stuffing box.
The connecting bolt 15 is sleeved with the bushing 20, the bushing 20 is sleeved with the disc spring set 19, one end of the connecting bolt 15 penetrates through the flange hole in the packing gland 8 to be connected with the valve cover 6, the bushing 20 is in sliding fit with the flange hole of the packing gland 8, the other end of the connecting bolt 15 is provided with the connecting nut 21, the upper end of the bushing 20 is provided with the flange structure, and the connecting nut 21 presses the disc spring set 19 on the packing gland 8 through the flange structure. The disc spring group 19 can effectively prevent the connecting bolt 15 from loosening, provide pretightening force for the packing assembly 7, enable the packing assembly 7 to be effectively compressed, and avoid leakage at the packing assembly 7.
The packing assembly 7 is formed by sequentially stacking a first molded graphite packing set, a spacer ring 18, a second molded graphite packing set 17 and a packing retainer 16 from top to bottom.
The flashboard valve clack assembly 5 comprises two main sealing body structures 30 which are bilaterally symmetrical, a segmented inner hole is formed in each main sealing body structure 30, an inner pipe body sealing structure 31 is arranged in each segmented inner hole, each inner pipe body sealing structure 31 is connected with the corresponding main sealing body structure 30 through a plurality of rib structures, the two inner pipe body sealing structures 31 are axially aligned, the two inner pipe body sealing structures 31 are in sealing connection through a second corrugated pipe 29, the two inner pipe body sealing structures 31 and the second corrugated pipe 29 form a spacer sleeve 38, the segmented inner holes of the two main sealing body structures 30 are axially aligned to form the main inner hole, a plurality of second compression springs 28 are arranged between the two main sealing body structures 30, and the two main sealing body structures 30 are connected through a plurality of positioning pins 32. The flashboard valve clack assembly 5 consists of two main sealing body structures 30, a second corrugated pipe 29, a plurality of positioning pins 32 and a plurality of second compression springs 28, wherein the plurality of second compression springs 28 are used for expanding the two main sealing body structures 30, so that the flashboard valve clack assembly 5 is tightly pressed against the inner valve seat assemblies 4 and the outer valve seats 2 on two sides, and sealing is convenient and leakage is avoided. A plurality of second compression springs 28 are uniformly distributed between the two main seal body structures 30 to provide a primary sealing specific pressure for the outer sealing surface of the outer valve seat 2. When the valve is closed, the outer valve seat 2 realizes the sealing of the cold end flow passage under the combined action of the cold end medium pressure and the spring force of the second compression springs 28.
The second compression springs 28 form two sets of springs which are arranged uniformly circumferentially, one set being coaxial with the two outer valve seats 2 when the valve is open and the other set being coaxial with the two outer valve seats 2 when the valve is closed. The present embodiment gives a specific arrangement of the second compression springs 28, and two sets of circumferentially evenly arranged spring sets facilitate valve seat sealing both when opening and when closing the valve.
The above embodiments are only illustrative of the present invention and do not limit the scope thereof, and those skilled in the art may also make modifications to parts thereof without departing from the spirit of the invention.
Claims (10)
1. The utility model provides a binary channels parallel double flashboard gate valve which characterized in that: comprises a valve body (1), a valve rod (9) and a valve cover (6); the valve body (1) is provided with a valve cavity (34), a medium inlet (35), a medium outlet (36) and a stop control port (37) of the valve body (1) are communicated through the valve cavity (34), an inner valve seat assembly (4) and an outer valve seat (2) which are sleeved inside and outside are arranged in the medium inlet (35) and the medium outlet (36), a first high-temperature flow channel is formed in the inner valve seat assembly (4) in the medium inlet (35), a first low-temperature flow channel is formed between the inner valve seat assembly (4) in the medium inlet (35) and the outer valve seat (2), a third high-temperature flow channel is formed in the inner valve seat assembly (4) in the medium outlet (36), a third low-temperature flow channel is formed between the inner valve seat assembly (4) in the medium outlet (36) and the outer valve seat (2), the stop control port (37) is sealed by the valve rod (6), the lower end of the valve rod (9) penetrates through the valve cover (6) and is connected with the valve disc valve clack assembly (5), the valve rod (9) in a sliding sealing fit with the valve cover (6) through the filler assembly (7), the valve rod (11) is connected with the valve cover (11) through the bracket (10) through the valve clack assembly (5), the valve rod (11) is connected with the inner hole (3) through the valve rod (5) through the inner hole of the valve sleeve (12), a second high-temperature flow passage is formed in the isolation sleeve (38), and a second low-temperature flow passage is formed between the isolation sleeve (38) and the main inner hole;
when the valve is opened, two end surfaces of the flashboard valve clack assembly (5) are respectively abutted and sealed with the two outer valve seats (2), two end surfaces of the isolation sleeve (38) are respectively abutted and sealed with the two inner valve seat assemblies (4), the first low-temperature flow channel, the second low-temperature flow channel and the third low-temperature flow channel are sequentially communicated, and the first high-temperature flow channel, the second high-temperature flow channel and the third high-temperature flow channel are sequentially communicated; when the valve is closed, the hydraulic cylinder (11) drives the flashboard valve clack assembly (5) to slide downwards through the valve rod (9), two end faces of the flashboard valve clack assembly (5) are respectively abutted against and sealed with the two inner valve seat assemblies (4) and the two outer valve seats (2), and the first high-temperature flow channel, the first low-temperature flow channel, the third high-temperature flow channel and the third low-temperature flow channel are closed.
2. The dual channel parallel double gate valve of claim 1, wherein: the inner valve seat assembly (4) comprises a supporting inner sleeve (25) and an inner valve seat body (24), the supporting inner sleeve (25) and the inner valve seat body (24) are coaxially aligned, a plurality of first compression springs (27) are arranged between the supporting inner sleeve (25) and the inner valve seat body (24), the supporting inner sleeve (25) and the inner valve seat body (24) are in sealing connection through a first corrugated pipe (23), a first supporting sleeve (26) is sleeved on the periphery of the supporting inner sleeve (25), the supporting inner sleeve (25) is connected with the first supporting sleeve (26) through a plurality of rib structures, a flowing space is formed between the supporting inner sleeve (25) and the first supporting sleeve (26), and the periphery of the first supporting sleeve (26) is connected with a corresponding medium inlet (35) or medium outlet (36) in a matched mode.
3. The dual channel parallel double gate valve of claim 2, wherein: the outer valve seat (2) is internally provided with a second supporting sleeve (22), the second supporting sleeve (22) is connected with the outer valve seat (2) through a plurality of rib structures, a flowing space is formed between the second supporting sleeve (22) and the outer valve seat (2), and the outer periphery of the inner valve seat body (24) is in sliding fit with the inner periphery of the corresponding second supporting sleeve (22).
4. The dual channel parallel double gate valve of claim 1, wherein: sliding grooves (3) are respectively arranged on two sides of the valve cavity (34), sliding strips (33) are respectively arranged on two sides of the flashboard valve clack assembly (5), and the two sliding strips (33) are vertically matched with the two sliding grooves (3) in a sliding mode in a one-to-one correspondence mode.
5. The dual channel parallel double gate valve of claim 1, wherein: the valve cover (6) is connected with the valve body (1) in a sealing way through a sealing ring (14) and a winding gasket (13).
6. A dual channel parallel double gate valve as defined in claim 3, wherein: the valve cover (6) is provided with a stuffing box, the stuffing assembly (7) is arranged in the stuffing box, the stuffing gland (8) is connected with the valve cover (6) through a plurality of connecting bolts (15), and the stuffing gland (8) presses the stuffing assembly (7) on the bottom surface of the stuffing box.
7. The dual channel parallel double gate valve of claim 6, wherein: the connecting bolt (15) is sleeved with a bushing (20), the bushing (20) is sleeved with a disc spring set (19), one end of the connecting bolt (15) penetrates through a flange hole in the packing gland (8) to be connected with the valve cover (6), the bushing (20) is in sliding fit with the flange hole of the packing gland (8), the other end of the connecting bolt (15) is provided with a connecting nut (21), the upper end of the bushing (20) is provided with a flange structure, and the connecting nut (21) presses the disc spring set (19) on the packing gland (8) through the flange structure.
8. The dual channel parallel double gate valve of claim 1, wherein: the packing assembly (7) is formed by sequentially superposing a first formed graphite packing set, a spacing ring (18), a second formed graphite packing set (17) and a packing seat ring (16) from top to bottom.
9. A dual channel parallel double gate valve according to any of claims 1-8, wherein: the flashboard valve clack assembly (5) comprises two main sealing body structures (30) which are bilaterally symmetrical, wherein a segmented inner hole is formed in the main sealing body structures (30), an inner pipe body sealing structure (31) is arranged in the segmented inner hole, the inner pipe body sealing structure (31) is connected with the corresponding main sealing body structures (30) through a plurality of rib structures, the two inner pipe body sealing structures (31) are axially aligned, the two inner pipe body sealing structures (31) are in sealing connection through a second corrugated pipe (29), the two inner pipe body sealing structures (31) and the second corrugated pipe (29) form an isolation sleeve (38), the segmented inner holes of the two main sealing body structures (30) are axially aligned to form the main inner hole, a plurality of second compression springs (28) are arranged between the two main sealing body structures (30), and the two main sealing body structures (30) are connected through a plurality of positioning pins (32).
10. The dual channel parallel double gate valve of claim 9, wherein: the second compression springs (28) form two groups of springs which are uniformly distributed circumferentially, wherein one group of springs is coaxial with the two outer valve seats (2) when the valve is opened, and the other group of springs is coaxial with the two outer valve seats (2) when the valve is closed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410062864.XA CN117570217B (en) | 2024-01-17 | 2024-01-17 | Double-channel parallel double-flashboard gate valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410062864.XA CN117570217B (en) | 2024-01-17 | 2024-01-17 | Double-channel parallel double-flashboard gate valve |
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| CN117570217B CN117570217B (en) | 2024-04-05 |
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| CN117570217B (en) | 2024-04-05 |
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