CN114321392A - Two-way high-temperature high-pressure self-balancing block valve - Google Patents
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- CN114321392A CN114321392A CN202110434903.0A CN202110434903A CN114321392A CN 114321392 A CN114321392 A CN 114321392A CN 202110434903 A CN202110434903 A CN 202110434903A CN 114321392 A CN114321392 A CN 114321392A
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- 238000007789 sealing Methods 0.000 claims abstract description 139
- 230000000903 blocking effect Effects 0.000 claims abstract description 27
- 239000002131 composite material Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 230000002457 bidirectional effect Effects 0.000 abstract description 10
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention discloses a bidirectional high-temperature high-pressure self-balancing block valve which comprises a valve body, a valve cover, a valve clack and a valve rod, wherein the valve body is provided with a valve seat; a balance hole is arranged on the valve clack or the valve rod; a composite sealing ring is arranged between the inner surface of the valve body and the outer surface of the valve clack; the composite sealing ring sequentially comprises an upper gasket, an upper sealing ring, an upper sub-ring, a lower sub-ring and a lower sealing ring from top to bottom, and a blocking ring is sleeved on the outer side of the upper gasket. The invention has the bidirectional pressure self-balancing and bidirectional self-sealing structure, greatly reduces the operating force for opening and closing the valve, compared with the prior art, not only can obviously reduce the energy consumption of the driving devices of electric, pneumatic and hydraulic valves, but also has reliable sealing, long service life and simple and convenient manufacturing method, and is suitable for various pressure pipelines which flow bidirectionally or unidirectionally; meanwhile, the sealing element is made of high-temperature-resistant and corrosion-resistant materials, and is particularly used for large-diameter high-temperature and high-pressure pipelines in the industries of electric power, petrochemical industry and the like.
Description
Technical Field
The invention relates to a valve, in particular to a bidirectional high-temperature high-pressure self-balancing block valve for blocking or connecting a bidirectional flowing medium pipeline in a high-temperature, high-pressure or corrosive environment.
Background
The valve is an indispensable important mechanical product on a pressure pipeline and is widely applied to the fields of petrifaction, oil fields, metallurgy, thermal power, nuclear power, ships and warships and the like. When the valve is used for high-temperature, high-pressure and large-diameter pipelines, an external bypass auxiliary valve is additionally arranged to release pressure and then the valve can be opened and closed, and the medium pressure not only causes the very difficult operation of the valve, but also easily causes the damage and the leakage of a sealing surface of the valve.
The pressure self-balancing valve can enable the medium pressure acting on the opening and closing piece to be self-balanced through a pressure self-balancing principle, and fundamentally eliminates the influence of the medium pressure on the aspects of the operation performance, the sealing quality, the sealing service life and the like of the valve. The pressure self-balancing valve is an important way for transformation and upgrading of the existing valve product, and the key technology for realizing the pressure self-balancing stop valve is sealing of a pressure self-balancing structure. In the prior art, the pressure self-balancing structure is usually sealed by O-shaped and Y-shaped sealing rings, and the sealing technology can convert medium pressure into pressure self-sealing of the sealing rings to a medium, so that the sealing rings can obtain a very good sealing effect without large sealing pretightening force. However, in practical applications, a large number of high-temperature and high-pressure pipelines flowing in two directions exist in pipeline systems such as petrochemical, oil field, metallurgy or power plant, for example, a high-pressure valve must be arranged in front of a high-pressure water pump for supplying water to a boiler, a mine, an oil well, etc., when the water pump supplies water, the valve needs to be opened to enable the water supply pipeline to be smooth, when the water pump stops supplying water, the valve needs to be closed to prevent the backflow of the high-pressure water, and in the power generation process of a thermal power plant, high-temperature and high-pressure steam generated by a plurality of boilers needs to be respectively sent into a common main pipe through the high-pressure valve, when part of the boiler supplies air, the valve also needs to be closed to prevent the backflow of the high-temperature and high-pressure steam. Because the high-density elastic materials which can be used for manufacturing O-shaped and Y-shaped sealing rings at present are rubber, plastic and the like which are not high in temperature resistance, the existing pressure self-balancing stop valve is only suitable for medium environments below 200 ℃, and cannot be used for high-temperature pressure pipelines with wide areas and large quantities, such as steam and the like.
In order to solve the problems, an invention patent application (application number is 201810862132.3) filed in 2018 by the inventor provides a bidirectional pressure self-balancing stop valve, wherein a composite sealing ring is arranged on a valve clack, and the composite sealing ring sequentially comprises a pressing ring, a blocking ring, an upper gasket, an upper sealing ring, an upper spacer ring, a lower spacer ring and a lower sealing ring from top to bottom. The shape of the lower end face of the compression ring and the shape of the upper end face of the upper gasket are conical faces, inclined faces, planes or spherical faces which extrude the blocking ring towards the inner direction of the valve clack, the shape of the lower end face of the upper gasket and the shape of the upper end face of the upper spacer ring are conical faces, inclined faces or spherical faces which extrude the upper sealing ring towards the outer direction of the valve clack, and the shape of the lower end face of the lower spacer ring and the shape of the upper end face of the valve clack are conical faces, inclined faces or spherical faces which extrude the lower sealing ring towards the outer direction of the valve clack; however, the above valve is complicated in structure, especially, the blocking ring is arranged on the upper gasket, and the upper gasket is arranged on the elastic sealing ring, when the blocking ring is pressed by the pressing ring, the upper gasket slides downwards along the sealing ring due to lack of a limiting measure for the upper gasket, so that the pressing force applied by the pressing ring is difficult to effectively act on the blocking ring, and therefore, enough sealing blocking force is difficult to obtain on the inner circle of the blocking ring and the upper end face of the upper gasket, and therefore, not only is the assembly difficulty great, but also the sealing effect of high-pressure media is directly influenced.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a block valve which is installed on a medium bidirectional flow pipeline under high-temperature, high-pressure or corrosive environment.
The technical scheme is as follows: the bidirectional high-temperature high-pressure self-balancing block valve comprises a valve body, a valve cover, a valve rod and a valve clack, wherein an upper valve body channel, a lower valve body channel and an inner valve body channel communicated with the upper valve body channel and the lower valve body channel are arranged in the valve body; the valve flap valve is characterized by further comprising a composite sealing ring and a blocking ring, wherein the composite sealing ring comprises an upper gasket, an upper sealing ring, an upper split ring, a lower split ring and a lower sealing ring which are sequentially sleeved outside the valve flap from the valve cover to the valve body direction, the blocking ring is sleeved outside the upper gasket, and a balance hole for communicating an inner cavity of the valve flap with an upper cavity of the valve body is formed in the valve flap or the valve rod.
The side end face of the upper gasket is a conical surface, an inclined surface, a plane or a spherical surface which extrudes the blocking ring towards the valve body direction, the lower end face of the upper gasket and the upper end face of the upper sub-ring are in the shapes of a conical surface, an inclined surface or a spherical surface which extrudes the upper sealing ring towards the valve body inner direction, and the lower end face of the lower sub-ring and the upper end face of the valve body are in the shapes of a conical surface, an inclined surface or a spherical surface which extrudes the lower sealing ring towards the valve body inner direction.
The inner surface of the valve body is provided with an annular sealing ring accommodating groove and a blocking ring accommodating groove; the outer surface of the valve clack and the inner surface of the valve body are in clearance fit with the upper gasket, the upper split ring and the lower split ring; a gap is formed between the lower end surface of the upper sub-ring and the upper end surface of the lower sub-ring; the lower end surface of the valve clack and the channel in the valve body are provided with sealing surfaces which are matched, and the sealing surfaces are planes, conical surfaces or spherical surfaces; a pressing piece is arranged between the upper gasket and the valve cover and is in threaded connection with the valve body; the blocking ring, the upper sealing ring and the lower sealing ring are made of flexible graphite or polytetrafluoroethylene materials.
Has the advantages that: compared with the prior art, the invention has the following advantages: the bidirectional pressure self-sealing structure is provided, so that a sealing structure is formed by sealing rings made of low-density, high-temperature-resistant or corrosion-resistant materials, the sealing structure has the advantages of lasting and reliable sealing quality and long sealing service life while obtaining excellent pressure self-sealing characteristics, is simple to assemble, high in reliability, more reasonable in stress relation among the sealing parts, and can be applied to high-temperature and high-pressure or corrosive environments. The medium pressure borne on the valve clack is self-balanced, the valve is easy to operate, the labor intensity of manual operation of the manual valve and the energy consumption of the electric pneumatic valve and the pneumatic valve are reduced, and the valve is suitable for pipelines with large drift diameters and medium bidirectional flow, good in safety and wide in application range.
Drawings
FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic view of the compressive force applied to the upper seal ring during pre-tightening according to the present invention;
FIG. 4 is a schematic view of the compressive force applied to the lower seal ring during pre-tightening according to the present invention;
FIG. 5 is a schematic diagram of the upper seal ring according to the present invention showing the self-sealing stress caused by the medium pressure;
fig. 6 is a schematic diagram of the medium pressure self-sealing stress of the lower sealing ring according to the invention.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
The two-way high-temperature high-pressure self-balancing block valve of the embodiment is shown in fig. 1, and comprises a valve body 1, a valve clack 4, a valve cover 18, a valve rod 19, a pressing piece 17, a blocking ring 13 and a composite sealing ring consisting of an upper gasket 15, an upper sealing ring 11, an upper split ring 10, a lower split ring 9 and a lower sealing ring 7, wherein the blocking ring 13 is sleeved outside the upper gasket 15, and the pressing piece 17 is installed between the upper gasket and the valve cover.
Wherein the valve cover 18 is fixedly connected with the valve body 1, the valve rod 19 passes through the valve cover 18, the lower end of the valve rod is connected with the valve clack 4 and can carry the valve clack 4 to move up and down along the inner surface of the valve body 1, and the opening or closing of the valve is completed.
An upper channel 3, a lower channel 33 and an inner channel 35 communicating the upper channel 3 and the lower channel 33 are arranged in the valve body 1, the valve clack 4 is arranged in a cavity of the valve body 1, and sealing surfaces which are matched with each other are arranged on the upper end surface of the inner channel 35 and the lower end surface of the valve clack 4 and are in the shape of a plane, a conical surface or a spherical surface.
The valve clack 4 or the valve rod 19 is provided with a balance hole 21 for communicating a lower channel 33 positioned below the lower end surface 34 of the valve clack 4 with the valve body upper cavity 16 positioned above the upper end surface 20 of the valve clack 4;
the inner surface of the valve body 1 is provided with an annular sealing ring accommodating groove and a blocking ring accommodating groove, an upper gasket 15, an upper sealing ring 11, an upper split ring 10, a lower split ring 9 and a lower sealing ring 7 are arranged in the sealing ring accommodating groove from top to bottom, and the blocking ring is positioned in the blocking ring accommodating groove;
a gap is formed between the lower end surface 26 of the upper split ring 10 and the upper end surface 27 of the lower split ring 9. The excircle 5 of the valve clack 4 is in clearance fit with the upper gasket 15, the upper split ring 10, the lower split ring 9 and the inner circle of the valve body 1;
the blocking ring 13, the upper sealing ring 11 and the lower sealing ring 7 are made of sealing materials, in this embodiment, in order to achieve the purpose of high temperature resistance, the sealing materials are flexible graphite, and in practical application, different sealing materials can be used as required.
The shape of the end surface 14 on the side of the upper gasket 15 is a conical surface, an inclined surface, a plane or a spherical surface which presses the blocking ring 13 towards the end surface 12 on the side of the valve body 1, and the purpose is to lead the end surface 14 on the side of the upper gasket 15 to press the blocking ring 13 towards the end surface 12 on the side of the valve body 1 by screwing the pressing piece 17, and block a medium channel which continues to flow along the upper gasket 15 and the valve body 1 after a medium permeates into the excircle surface 23 of the upper sealing ring 11;
the lower end surface 22 of the upper gasket 15 and the upper end surface 25 of the upper split ring 10 are in the shape of a conical surface, an inclined surface or a spherical surface which extrudes the upper sealing ring 11 towards the inner direction of the valve body 1; by screwing the pressing piece 17, the upper gasket 15 and the upper split ring 10 jointly extrude the upper sealing ring 11 inwards, the inner circular surface 24 of the upper sealing ring 11 obtains larger sealing pretightening force than the outer circular surface 23 thereof, so that a medium can conveniently extrude the outer circular surface 23 of the upper sealing ring 11 with smaller pretightening force along a gap between the lower end surface 26 of the upper split ring 10 and the upper end surface 27 of the lower split ring 9 and then along a gap between the outer circle of the upper split ring 10 and the inner cavity 8 of the valve body 1, thereby the upper sealing ring 11 is extruded inwards to force the inner circular surface 24 of the upper sealing ring 11 to be further attached to the outer circle 5 of the valve clack 4, the pressure self-sealing of the upper sealing ring 11 on the valve clack 4 is formed, and the stress condition when the upper sealing ring is pretightened is shown in figure 3, wherein N1And N1' represents a pressing force in different directions, N2Representing seal preload;
similarly, the lower end surface 28 of the lower sub-ring 9 and the upper end surface 31 of the valve body 1 are shaped as a conical surface, an inclined surface or a spherical surface which extrudes the lower sealing ring 7 towards the inner direction of the valve body 1, and the lower sub-ring 9 and the valve body 1 extrude the lower sealing ring 7 inwards together by screwing the pressing piece 17The inner circular surface 30 of the lower sealing ring 7 obtains a larger sealing pretightening force than the outer circular surface 29, so that a medium can conveniently permeate the outer circular surface 29 of the lower sealing ring 7 with a smaller pretightening force along a gap between the lower end surface 26 of the upper sub-ring 10 and the upper end surface 27 of the lower sub-ring 9 and then along a gap between the outer circle of the lower sub-ring 9 and the inner cavity 8 of the valve body 1 to form extrusion towards the inner direction of the lower sealing ring 7, so that the inner circular surface 30 of the lower sealing ring 7 is further tightly attached to the outer circle 5 of the valve clack 4 to form pressure self-sealing of the lower sealing ring 7 on the valve clack 4, and the stress condition when the lower sealing ring is pretightened is shown in figure 4, wherein N is1And N1' represents a pressing force in different directions, N2Representing seal preload;
a gap is formed between the lower end surface 26 of the upper sub-ring 10 and the upper end surface 27 of the lower sub-ring 9, so that a medium is conveniently extruded upwards along the lower end surface 26 of the upper sub-ring 10, the upper sealing ring 11 is forced to be further attached to the lower end surface 22 of the upper gasket 15, and the pressure self-sealing of the upper sealing ring 11 on the lower end surface 22 of the upper gasket 15 is formed; the medium is extruded downwards along the upper end face 27 of the lower sub-ring 9, so that the lower sealing ring 7 is further tightly attached to the upper end face 31 of the valve body 1, and the pressure self-sealing of the lower sealing ring 7 on the upper end face 31 of the valve body 1 is formed.
After the block valve is connected with a pressure pipeline, when the valve is in a closed state, if a medium enters from the lower channel 33, the medium enters into the upper cavity 16 of the valve body through the balance hole 21, so that the upper end surface 20 and the lower end surface 34 of the valve clack are subjected to a pair of forces which are opposite in direction and mutually offset along the axial direction of the valve clack 4, and the self-balance of the axial pressure of the medium along the valve clack 4 is realized; if the medium enters from the upper channel 3, the pressure of the medium acts on the excircle surface 5 of the valve clack to form mutually counteracted radial force, and the radial pressure self-balance of the medium along the excircle surface 5 of the valve clack is realized. When the valve is in an opening state, under the pulling of the valve rod 19, the valve clack 4 is lifted, and the medium flows out from the valve body outlet along the channel 35 in the valve body until the valve is completely opened.
The valve rod 19 pushes the valve clack to move downwards along the inner surface of the valve body, so that the second sealing surface on the lower end surface 34 of the valve clack is tightly attached to the sealing surface on the upper end surface of the inner channel 35 of the valve body to realize sealing, the valve is in a turn-off state at the moment, and when pressure media enter from the upper channel 3 of the valve body, the pressure of the mediaThe self-sealing principle is shown in fig. 5: wherein N is3And N3' represents the adhesion force of the medium in different directions, N4Represents the pressure of the medium; the pressure medium flows upwards through the gap between the valve clack excircle 5 and the valve body inner circle 6, the pressure medium extrudes through the inner circle surface 30 of the lower sealing ring 7 under the action of the pretightening force, then flows into the excircle surface 23 of the upper sealing ring 11 with smaller pretightening force along the gap between the valve clack excircle 5 and the inner circle of the lower split ring 9, the gap between the upper end surface 27 of the lower split ring 9 and the lower end surface 26 of the upper split ring 10 and the gap between the excircle of the upper split ring 10 and the valve body inner cavity 8 in sequence, the medium flowing into the lower end surface 26 of the upper split ring 10 extrudes the upper sealing ring 11 along the lower end surface 26 of the upper split ring 10 to form the pressure self-sealing of the upper sealing ring 11 to the lower end surface 22 of the upper sealing ring 15 and also to block the medium channel between the upper sealing ring 11 and the upper sealing ring 15, so that the medium flowing into the excircle surface 23 of the upper sealing ring 11 forms the inward extrusion of the upper sealing ring 11, the inner circle surface 24 of the upper sealing ring 11 is forced to further cling to the outer circle 5 of the valve clack 4, and the pressure of the upper sealing ring 11 on the valve clack 4 is formed to be self-sealing.
When the pressure medium enters from the lower channel 33 of the valve body, the principle of medium pressure self-sealing is shown in fig. 6: wherein N is3And N3' represents the adhesion force of the medium in different directions, N4Representing the pressure of a medium, the pressure medium is transmitted to the upper cavity 16 of the valve body through a balance hole 21 arranged on the valve clack 4 or the valve rod 19, the pressure medium flows downwards through a gap between the inner circle of the upper gasket 15 and the outer circle 5 of the valve clack, the pressure medium extrudes through the inner circle surface 24 of the upper gasket 11 under the action of a pretightening force because the upper gasket 11 is acted by the pretightening force, then the pressure medium flows into the surface 29 of the lower gasket 7 with smaller pretightening force along the gap between the outer circle 5 of the valve clack and the inner circle of the upper split ring 10, the gap between the lower end surface 26 of the upper split ring 10 and the upper end surface 27 of the lower split ring 9 and the gap between the outer circle of the lower split ring 9 and the inner cavity 8 of the valve body in sequence, the pressure self-sealing of the upper end surface 31 of the valve body 1 by the lower gasket 7 is formed by extruding along the downward direction of the upper end surface 27 of the lower split ring 9, and the medium channel of the upper end surface 31 of the lower gasket 7 and the valve body 1 is blocked, so as to flow into the outer circumferential surface 29 of the lower seal ring 7The medium forms downward extrusion towards the inner direction of the lower sealing ring 7, so that the inner circle surface 30 of the lower sealing ring 7 is further tightly attached to the outer circle 5 of the valve clack 4, and the pressure self-sealing of the lower sealing ring 7 on the valve clack 4 is formed.
In summary, since the pressing force of the pressing seal ring is a self-sealing force formed by the medium pressure itself, the pressing force is more reliable with the rise of the medium pressure, and the sealing effect is not only irrelevant to the magnitude of the medium pressure, but also irrelevant to the magnitude of the sealing pre-tightening force of the inner circular surface 24 of the upper seal ring 11 or the inner circular surface 30 of the lower seal ring 7 on the outer circular surface 5 of the valve flap 4, therefore, the seal ring can be made of a loose and high-temperature-resistant elastic material to realize the self-sealing of the medium pressure, and meanwhile, although the abrasion of the outer circular surface 5 of the valve flap 4 on the inner circular surface 24 of the upper seal ring 11 or the inner circular surface 30 of the lower seal ring 7 can cause the reduction of the sealing pre-tightening force of the present invention, the reduction of the sealing effect of the present invention can not be caused. The invention does not only realize sealing by extruding between parts and sealing elements, but also enables the sealing elements to obtain enough material density by screwing the pressing element 17, and sealing pretightening force which is far less than medium pressure is formed on the inner circular surface 24 of the upper sealing ring 11, the inner circular surface 30 of the lower sealing ring 7 and the outer circular surface 5 of the valve clack 4, thus obtaining durable and reliable sealing quality and sealing service life.
The result of testing the block valve of the invention under the conditions that the valve diameter is 250mm, the sealing test pressure is more than or equal to 42MPa, and the duration is more than or equal to 60s shows that the block valve realizes zero leakage, and the required operating torque of the valve is less than 450 N.m, which is only 1/20 of the valve in the prior art, therefore, the block valve has excellent sealing property and small operating torque, and is suitable for pipelines with large diameters.
The above description is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that several modifications and decorations can be made without departing from the principle of the present invention, for example, the upper gasket may be a single part or a combination of multiple parts, the upper gasket, the pressing member and the valve cover may be made as a single part, the number and combination of the sealing members may be various, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A two-way high-temperature high-pressure self-balancing block valve comprises a valve body (1), a valve cover (18), a valve rod (19) and a valve clack (4), wherein a valve body upper channel (3), a valve body lower channel (33) and a valve body inner channel (35) for communicating the valve body upper channel (3) and the valve body lower channel (33) are arranged in the valve body; a composite sealing ring and a blocking ring (13) are arranged between the valve body (1) and the valve clack (4); the valve is characterized in that the composite sealing ring comprises an upper gasket (15), an upper sealing ring (11), an upper split ring (10), a lower split ring (9) and a lower sealing ring (7) which are sequentially sleeved outside the valve clack from the valve cover to the valve body direction, and the blocking ring (13) is sleeved outside the upper gasket (15); and a balance hole (21) for communicating the valve clack inner cavity (36) with the valve body upper cavity (16) is formed in the valve clack (4) or the valve rod (19).
2. The two-way high-temperature high-pressure self-balancing block valve according to claim 1, wherein the side end surface (14) of the upper gasket (15) is a conical surface, an inclined surface, a flat surface or a spherical surface which presses the blocking ring (13) towards the valve body (1), the lower end surface (22) of the upper gasket (15) and the upper end surface (25) of the upper split ring (10) are conical surfaces, inclined surfaces or spherical surfaces which press the upper sealing ring (11) towards the inner direction of the valve body (1), and the lower end surface (28) of the lower split ring (9) and the upper end surface (31) of the valve body (1) are conical surfaces, inclined surfaces or spherical surfaces which press the lower sealing ring (7) towards the inner direction of the valve body.
3. The two-way high-temperature high-pressure self-balancing block valve of claim 1, characterized in that the inner surface of the valve body (1) is provided with an annular sealing ring accommodating groove and a blocking ring accommodating groove.
4. The two-way high-temperature high-pressure self-balancing block valve according to claim 1, characterized in that the outer surface of the valve flap (4) and the inner surface of the valve body are in clearance fit with the upper gasket (15), the upper split ring (10) and the lower split ring (9).
5. The two-way high temperature and pressure self-balancing shut-off valve according to claim 1, characterized in that a gap is provided between the lower end surface (26) of the upper split ring (10) and the upper end surface (27) of the lower split ring (9).
6. A two-way high-temperature high-pressure self-balancing block valve according to claim 1, wherein the lower end surface of the valve flap (4) and the channel (35) in the valve body have matching sealing surfaces, and the sealing surfaces are flat surfaces, conical surfaces or spherical surfaces.
7. The two-way high-temperature and high-pressure self-balancing block valve is characterized in that a pressing piece (17) is installed between the upper gasket (15) and the valve cover (18), and the pressing piece (17) is in threaded connection with the valve body (1).
8. The two-way high-temperature high-pressure self-balancing block valve according to claim 1, wherein the blocking ring (13), the upper sealing ring (11) and the lower sealing ring (7) are made of flexible graphite or polytetrafluoroethylene materials.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110434903.0A CN114321392A (en) | 2021-04-22 | 2021-04-22 | Two-way high-temperature high-pressure self-balancing block valve |
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| CN202110434903.0A CN114321392A (en) | 2021-04-22 | 2021-04-22 | Two-way high-temperature high-pressure self-balancing block valve |
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| CN114321392A true CN114321392A (en) | 2022-04-12 |
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| CN107131353A (en) * | 2017-04-25 | 2017-09-05 | 中国船舶重工集团公司第七二五研究所 | A kind of two-way low operational torque high-pressure stop valve |
| CN108708979A (en) * | 2018-08-01 | 2018-10-26 | 周君 | Bidirection press self-balance stop valve |
| CN218347942U (en) * | 2021-04-22 | 2023-01-20 | 南京新视界阀门科技有限公司 | Two-way high-temperature high-pressure self-balancing block valve |
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2021
- 2021-04-22 CN CN202110434903.0A patent/CN114321392A/en active Pending
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|---|---|---|---|---|
| US4328974A (en) * | 1980-02-19 | 1982-05-11 | White Richard E | Stuffing box packing system and method |
| WO2008113264A1 (en) * | 2007-03-21 | 2008-09-25 | Mingguo Dong | Sealing device and crawler with said sealing device |
| CN101806363A (en) * | 2010-04-30 | 2010-08-18 | 南京理工大学 | High-pressure high-temperature two-way balance stop valve |
| CN204140905U (en) * | 2014-09-28 | 2015-02-04 | 西安广核阀门有限公司 | The sealing configuration of a kind of high-pressure stop valve valve gap and valve body |
| CN205090076U (en) * | 2015-10-10 | 2016-03-16 | 福建省大通互惠阀门有限公司 | Valve rod packing structure of valve |
| CN107131353A (en) * | 2017-04-25 | 2017-09-05 | 中国船舶重工集团公司第七二五研究所 | A kind of two-way low operational torque high-pressure stop valve |
| CN108708979A (en) * | 2018-08-01 | 2018-10-26 | 周君 | Bidirection press self-balance stop valve |
| CN218347942U (en) * | 2021-04-22 | 2023-01-20 | 南京新视界阀门科技有限公司 | Two-way high-temperature high-pressure self-balancing block valve |
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