CN214534582U - High-temperature high-pressure sleeve type self-sealing structure regulating valve - Google Patents

Abstract

A high-temperature high-pressure sleeve type self-sealing structure regulating valve comprises an upper valve cover, a screwed plug, a set screw, a pressure ring, a split retainer ring, an outer forming sealing gasket, an inner forming sealing gasket, a balance cylinder, a valve plug, a sleeve, a valve seat, a graphite winding gasket, a valve body, a piston ring and a valve rod, its characterized in that, disk seat, sleeve, balanced jar install inside the valve body in proper order, it is sealed with graphite winding pad static between disk seat and the valve body, it is sealed to have the twice piston ring between valve plug and the balanced jar, go up the valve gap and utilize outer shaping gasket to form the self sealss with the valve body, go up the valve gap and utilize inner shaping gasket self sealss with balanced jar, split retaining ring, outer shaping gasket combination constitution outer positioning, inner shaping gasket, clamping ring, holding screw, the location in the plug combination, two location constitution valve overall structure location are connected, compare with prior art, the beneficial effects of the utility model: simple structure, the leakproofness is strong, and the application is strong, and it is convenient to change, reduces intensity of labour, saves expense, longe-lived.

Description

High-temperature high-pressure sleeve type self-sealing structure regulating valve

Technical Field

The utility model relates to a sleeve governing valve field especially relates to a telescopic self sealss structure governing valve of high temperature high pressure.

Background

The regulating valve is also called a control valve, and in the field of industrial automation process control, the final control element for changing the process parameters of medium flow, pressure, temperature, liquid level and the like by power operation through receiving the control signal output by a regulating control unit. Generally consisting of an actuator and a valve.

Generally, the upper valve cover of the valve is connected with the valve body through bolts, the upper valve cover is connected with the valve body through bolts, the bolts compress a sealing gasket between the upper valve cover and the valve body to overcome medium pressure to form sealing, in a high-temperature and high-pressure valve, the specifications of the bolts are generally selected greatly, generally, the bolts of the upper valve cover of the valve of ANSI2500 DN200 reach 12M 56, the materials are Cr-Mo alloy steel, the price is high, and the bolts are required to be subjected to flaw detection to prevent defects.

Normally, the strength and sealing test of the valve body is carried out at normal temperature, the temperature of the valve body can reach more than 550 ℃ after a medium is introduced into the valve body, so that thermal expansion and cold shrinkage and concentrated stress are generated due to large temperature change, the sealing force is changed, sometimes a user needs to screw a valve cover bolt for the second time during starting to prevent leakage, individual users directly use the valve on line, and finally the sealing gasket is damaged due to leakage.

The seal between balancing cylinder and the valve plug is usually compressed tightly for graphite packing, but because the scouring of medium under high temperature and high pressure environment to and the little leakage quantity very easily leads to graphite packing to damage during the motion, finally loses sealed effect.

Disclosure of Invention

The utility model provides a telescopic self sealss structure governing valve of high temperature high pressure, a series of technical problem that brings in order to solve traditional sealed form, the utility model relates to a telescopic self sealss structure governing valve of high temperature high pressure will go up the sealed design between valve gap and the valve body and be self sealss structure, and the pressure that utilizes the medium will go up the valve gap and the valve body is sealed. Meanwhile, the sealing area defined by the balance cylinder and the valve cover is larger than that defined by the valve plug and the valve seat, so that the balance cylinder is integrally stressed downwards, the balance cylinder is limited and connected in series with the sleeve and the valve seat, and finally the sealing gasket under the valve seat is pressed to seal with the valve body. Dynamic seal between valve plug and the balance cylinder is pure metal seal, and the sealing washer is the piston ring formula, and the piston ring is pressed to balance cylinder inner wall by self bulging force and forms sealed specific pressure, has the clearance simultaneously between piston ring and the valve plug, and the medium gets into behind piston ring and the valve plug clearance outside inflation auxiliary seal under the medium pressure effect. Meanwhile, the sleeve structure can be changed to adapt to different pressure differences or medium occasions as required.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a high-temperature high-pressure sleeve type self-sealing structure regulating valve comprises an upper valve cover, a plug, a set screw, a pressure ring, a split retainer ring, an outer forming seal gasket, an inner forming seal gasket, a balance cylinder, a valve plug, a sleeve, a valve seat, a graphite winding gasket, a valve body, a piston ring and a valve rod, and is characterized in that the valve rod is in threaded connection with the valve plug and then is prevented from loosening by spot welding, the upper end of the valve rod is connected with an execution mechanism, the valve rod and the valve plug form a movable component of the valve, the valve seat, the sleeve and the balance cylinder are sequentially arranged in the valve body, the balance cylinder, the sleeve and the valve seat are in limiting series connection with a spigot, which are mutually positioned and constrained, the valve seat is arranged on the plane of the valve body, the valve plug is sequentially in clearance fit with the balance cylinder and the sleeve when moving downwards, a conical sealing surface at the bottom of the valve plug is matched with a conical surface of the valve seat, the valve seat is positioned at the lower part of the valve body, and the valve seat and the valve body are statically sealed by the graphite winding gasket, two piston ring seals are arranged between the valve plug and the balance cylinder, the upper valve cover passes through the valve rod cover and is arranged on the valve body, the wedge-shaped surface of the outer forming sealing gasket is in contact fit with the positioning sealing surface of the upper valve cover, the split retaining ring is arranged on the outer forming sealing gasket, the flange of the split retaining ring is in installation fit with the valve body, the upper valve cover and the valve body form self-sealing by utilizing an outer forming sealing gasket, a set screw passes through the upper valve cover and is screwed into the valve body, the top of the set screw is provided with a plug for positioning, the bottom end of the set screw presses a pressing ring to downwards press the inner forming sealing gasket, the inner forming sealing gasket is in contact seal with the wedge-shaped sealing surface of the balance cylinder, the upper valve cover and the balance cylinder form self-sealing by utilizing an inner forming sealing gasket, meanwhile, the sealing area limited by the seal of the balance cylinder and the upper valve cover is larger than the sealing area limited by the valve plug and the valve seat, the split retaining ring and the outer forming sealing gasket are combined to form the upper valve cover and are positioned outside the valve body, the inner forming sealing gasket, the upper valve cover and the balance cylinder are positioned outside the valve body, The upper valve cover and the balance cylinder are positioned in the balance cylinder by the compression ring, the set screw and the plug combination, and the two positioning components are connected in a positioning manner by the whole valve structure.

The outer forming sealing gasket and the inner forming sealing gasket are wedge-shaped sealing rings with a certain angle, and the angle is 30-45 degrees.

The outer forming sealing gasket and the inner forming sealing gasket are made of graphite nickel-sandwiched wires.

The pressure of the outer and inner shaped gaskets is derived from the pressure of the medium.

The split retainer ring is of a 4-segment structure.

The sleeve valve medium is liquid.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the high-temperature high-pressure sleeve type self-sealing structure regulating valve has the advantages that the wedge-shaped outer forming sealing gasket and the split check ring are selectively used between the upper valve cover and the valve body, the upper valve cover and the valve body are sealed by utilizing the pressure of a medium, the larger the medium pressure is, the better the sealing performance is, the valve does not need to worry about the influence of the pressure on sealing, the sealing performance in a high-temperature high-pressure environment is strong, the leakage is not easy, the practicability is high, and the application range is wide.

2) A telescopic self sealss structure governing valve of high temperature high pressure adopts the sealed pad self sealss that takes shape in the wedge between upper valve cover and the balance cylinder, utilizes the pressure of medium to accomplish sealedly, and sealed pad can be along with the pressure grow deformation increase of medium, and sealed effect is stronger, has avoided medium pressure too big and sealed the inefficacy, has improved sealed effect, and application range is wider.

3) The utility model provides a telescopic self sealss structure governing valve of high temperature high pressure, dynamic seal between valve plug and the balanced jar is sealed for pure metal, the sealing washer is the piston ring type, the piston ring is by self bulging force, press to balanced jar inner wall and form sealed specific pressure, there is the clearance simultaneously between piston ring and the valve plug, the medium gets into outside inflation auxiliary seal under the medium pressure effect behind piston ring and the valve plug clearance, along with medium pressure is big more, the piston ring bulging force is big more, sealed specific pressure between piston ring and the balancing bar is big more, its sealed effect, its sealing mechanism is simple better, sealing performance is good, the piston ring is movable seal, along with the valve plug removes, and according to the sealed proportion inferior between the atress adjustment valve plug and the balanced jar of different valve plug positions, its regulating power is strong, prevent that leakage ability is strong.

4) The high-temperature high-pressure sleeve type self-sealing structure regulating valve has the advantages that the upper valve cover is connected without bolts, the positioning combination of the outer forming sealing gasket and the split retainer ring and the positioning combination of the inner forming sealing gasket, the compression ring, the set screw and the screwed plug are matched, positioned, installed and connected, the bolt positioning connection is saved, a large amount of installation cost is saved, the screwing degree of a secondary check bolt is not needed when the valve is opened, the labor intensity of field operators is reduced, a large amount of labor time is saved, and the production operation rate is improved.

5) The high-temperature high-pressure sleeve type self-sealing structure regulating valve has the advantages that the inner and outer combined positioning connection mode is adopted between the valve cover and the valve body instead of the static fixed connection of the bolt connection, the whole regulation of the valve is more flexible, the problem that the service performance of the valve cannot be regulated due to the fixed connection state of the bolt is avoided, the pressure of the valve is in a dynamic regulation process, the service functions of all elements in the valve are protected, the maintenance time of the valve is saved, and the service life of the valve is prolonged.

6) The utility model provides a telescopic self sealss structure governing valve of high temperature high pressure, the sealed seal area who prescribes a limit to of balancing cylinder and valve gap is greater than the seal area that valve plug and disk seat prescribe a limit to, so to the balancing cylinder the direction of the pressure differential that produces through medium pressure all the time downwards, the inside whole atress of valve is downwards, because balancing cylinder and sleeve, the spacing series connection of three tang of disk seat, final atress is pressed on sealed pad and the sealed face of valve body circular cone contact under the disk seat, make the whole sealing performance of valve better, the ability of cutting off the medium circulation is stronger, the difficult phenomenon that takes place medium "break the drip".

7) The high-temperature high-pressure sleeve type self-sealing structure regulating valve is more reasonable in overall valve structure, more convenient to operate, less in requirement on operators, lower in requirement on working environment and better in adaptability.

Drawings

Fig. 1 is a sectional view of the high-temperature high-pressure sleeve type self-sealing regulating valve structure of the utility model.

In the figure: 1. upper valve cover 2, screw plug 3, set screw 4, press ring 5, split retainer ring 6, internal formed sealing gasket 7, external formed sealing gasket 8, balance cylinder 9, valve plug 10, sleeve 11, valve seat 12, graphite wound gasket 13, valve body 14, piston ring 15, valve rod

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

as shown in figure 1, the high-temperature high-pressure sleeve type self-sealing structure regulating valve comprises an upper valve cover 1, a plug 2, a set screw 3, a pressing ring 4, a split retainer ring 5, an inner forming seal gasket 6, an outer forming seal gasket 7, a balance cylinder 8, a valve plug 9, a sleeve 10, a valve seat 11, a graphite winding gasket 12, a valve body 13, a piston ring 14 and a valve rod 15, wherein the valve rod 15 and the valve plug 9 are connected in a threaded manner and then are prevented from loosening through spot welding, the upper end of the valve rod 15 is used for being connected with an executing mechanism, the valve rod 15 and the valve plug 9 form a movable component of the valve, the valve rod 15 and the valve plug 9 can move up and down in the valve body 13 in a smooth manner through the driving of the executing mechanism to complete the opening and closing actions of the valve, the valve seat 11, the sleeve 10 and the balance cylinder 8 are sequentially installed in the valve body 13, the balance cylinder 8, the sleeve 10 and the valve seat 11 are in limiting series connection with three stop openings of the sleeve 10 and the valve seat 11 which are mutually positioned and constrained, and the valve seat 11 and the sleeve 10, The balance cylinders 8 are assembled in contact with each other and are tightly installed in the inner cavity of the valve body 13, the axes of the valve seat 11, the sleeve 10 and the balance cylinder 8 are superposed, the coaxiality is good, the valve plug 9 is ensured to slide up and down along a common axis, the valve seat 11 is installed on the plane of the valve body, the valve plug 9 is in clearance fit with the balance cylinder 8 and the sleeve 10 in sequence when moving downwards, the conical sealing surface at the bottom of the valve plug 9 is in fit sealing with the conical surface of the valve seat 11, the up-and-down sliding of the valve plug 9 is restrained by the balance cylinder 8 and the sleeve 10, the balance cylinder 8 and the sleeve 10 have a guiding function on the valve plug 9, the ensured valve plug 9 slides up and down along the central axis, and the restrained guiding of the balance cylinder 8 and the sleeve 10 can lead the valve plug 9 and the valve rod 15 to be automatically centered, the valve plug 9 and the valve seat 11 are in automatic centering contact fit to form a main cutting sealing part of the valve, and the conical sealing surface is tighter, the valve is not easy to leak, the assembly of the form is favorable for alignment and assembly of the valve plug 9 and the valve rod 15, the action is accurate, the opening and closing of the valve are ensured, the valve seat 11 is positioned at the lower part of the valve body, the graphite winding pad 12 is used for static sealing between the valve seat 11 and the valve body 13, the graphite winding pad 12 has good compressibility and good sealing performance, certain clearance compensation can be performed, the phenomenon that the medium in the valve body 13 leaks is ensured, two piston rings 14 are arranged between the valve plug 9 and the balance cylinder 8 for sealing, the medium pressure in the valve body 13 is in a real-time changing state, the piston rings 14 can change the expansion form according to the change of the medium pressure, the larger the medium pressure is, the larger the expansion change rate is, the larger the contact area between the piston rings 14 and the balance cylinder 8 is, the larger the sealing specific pressure formed by the self expansion force of the piston rings 14 pressing the inner wall of the balance cylinder 8 is, the sealing between the valve plug 9 and the balance cylinder 8 is tighter, the sealing performance is better, meanwhile, a gap exists between the piston ring 14 and the valve plug 9, a medium enters the gap between the piston ring and the valve plug and expands outwards under the action of medium pressure to assist sealing, the piston ring 14 moves up and down along with the valve plug 9 and can change the self-expansion coefficient according to the change of external force in the sliding process, the piston ring 14 is ensured to be always tightly attached to the inner wall of the balance cylinder 8, a dynamic sliding sealing strip is formed, the sealing of the valve is ensured, the valve cover 1 is suitable for various high-pressure and vibration occasions, the valve cover 1 penetrates through the valve rod 15 to cover the valve body 13, the wedge surface of the outer forming sealing gasket 7 is in contact fit with the positioning sealing surface of the upper valve cover 1, the split retaining ring 5 is arranged on the outer forming sealing gasket 7, the flange of the split retaining ring 5 is arranged and matched with the valve body 13, the upper valve cover 1 and the valve body 13 form self-sealing by the outer forming sealing gasket 7, the medium pressure in the valve body 13 changes, the upper valve cover 1 is propped against, upward pressure is applied to the upper valve cover 1, the wedge-shaped contact surface of the upper valve cover 1 and the outer forming sealing gasket 7 is subjected to the upward pressure, the outer forming sealing gasket 7 is compressed and deformed, so that the outer forming sealing gasket 7 is matched with the upper valve cover 1 and the valve body 13 more tightly, the appearance of the outer forming sealing gasket 7 is changed along with the change of the pressure of a medium, the outer forming sealing gasket is in a dynamic contact sealing state and is in a self-sealing state without external force fixation, the self-sealing is completed without external force fixation, the fastening screw 3 penetrates through the upper valve cover 1 and is screwed into the valve body 13, the screwed plug 2 is arranged at the top of the fastening screw 3 for positioning, the bottom end of the fastening screw 3 presses the pressing ring 4 downwards to press the inner forming sealing gasket 6, the inner forming sealing gasket 6 is in contact sealing with the wedge-shaped sealing surface of the balancing cylinder 8, the upper valve cover 1 and the balancing cylinder 8 form self-sealing by utilizing the inner forming sealing gasket 6, the pressure of the inner forming sealing gasket 6 comes from the fastening force of the fastening screw 3 and the medium pressure, double force is superposed and applied to the inner forming sealing gasket 6, the inner forming sealing gasket 6 is compressed and deformed, the volume of the inner forming sealing gasket 6 is changed through the change of medium pressure, the inner forming sealing gasket 6 is in real-time dynamic contact sealing to complete the sealing between the balance cylinder 8 and the upper valve cover 1, meanwhile, the sealing area defined by the sealing of the balance cylinder 8 and the upper valve cover 1 is larger than the sealing area defined by the valve plug 9 and the valve seat 11, so that the balance cylinder 8 is integrally stressed downwards, the balance cylinder 8 is limited and connected in series with three rabbets of the sleeve 10 and the valve seat 11, finally, the pressure presses the graphite winding pad 12 and the conical sealing surface below the valve seat 11 to realize the sealing of the whole valve, the split retainer ring 5 and the outer forming sealing gasket 7 are combined to form the upper valve cover 1 and the outer positioning of the valve body 13, the inner forming sealing gasket 6, the pressure ring 4, the fastening screw 3 and the screw plug 2 are combined to form the upper valve cover 1 and the inner positioning of the balance cylinder 8, the two positioning components form the positioning connection of the whole valve structure, when the medium pressure is increased, the upper valve cover 1 moves upwards to extrude the outer forming sealing gasket 7 to form sealing due to the pressure difference between the inside and the outside of the valve, the outer forming sealing gasket 7 is attached to the split retaining ring 5, the upward pressure of the upper valve cover 1 is pressed on the valve body 13 through the split retaining ring 5, so that the upper valve cover 1 is fixed on the valve body 13 in the upward direction, meanwhile, the upper valve cover 1 presses the upper valve cover 1 on the pressure ring 4 and the inner forming sealing gasket 6 through the set screw 3 and the plug 2, and then the pressure is limited through the three stop ports of the balance cylinder 8, the sleeve 10 and the valve seat 11 in series, the pressure of the set screw 3 is transmitted to the installation plane of the valve body 13, so that the upper valve cover 1, the pressure ring 4, the inner forming sealing ring 6, the balance cylinder 8, the sleeve 10 and the valve seat 11 are fixedly installed through positioning, and meanwhile, because of a static fixing structure connected by fasteners is not provided, the whole valve component is in a dynamic fixing state, the inner and outer formed sealing gaskets are compressed by medium pressure to adjust the fixed state of the inner and outer formed sealing gaskets, so that the valve can always keep the stable fixed state and the sealing condition is good.

As shown in fig. 1, the outer shaped seal 7 and the inner shaped seal 6 are wedge shaped seals with an angle of 30-45 °.

The outer forming sealing gasket 7 and the inner forming sealing gasket 6 are made of graphite nickel-sandwiched wires.

As shown in fig. 1, the pressure of the outer shaped seal 7 and the inner shaped seal 6 comes from the medium pressure, and the self-sealing process is completed by the medium pressure combined with the characteristics of the wedge-shaped seal itself.

As shown in fig. 1, the split retainer ring 5 has a 4-split structure, and through the split structure, the opening degree of the split retainer ring 5 can be adjusted according to the pressure of a medium, so as to ensure the fixation of the outer forming seal gasket 7, and through the split structure, the dynamic fixation structure of the upper valve cover is adjusted, so that the upper valve cover is dynamically fixed on the valve body.

The sleeve valve medium is liquid.

The utility model relates to a telescopic self sealss structure governing valve of high temperature high pressure's theory of operation is: the regulating valve combines an external positioning seal with an internal plug 2, a set screw 3, a press ring 4 and an internal forming seal 6 through an external split retainer ring 5 and the external forming seal 7 to form an internal positioning seal, the external positioning seal is combined with an internal positioning seal two compartments, the upper valve cover 1, the plug 2, the set screw 3, the press ring 4, the split retainer ring 5, the internal forming seal 6, the external forming seal 7, a balance cylinder 8, a valve plug 9, a sleeve 10, a valve seat 11 and a graphite winding pad 12 of the integral valve are fixed on a valve body 13, the structure extrudes the external forming seal 7 by the upward movement of the upper valve cover 1 due to the pressure difference between the inside and the outside of the valve along with the increase of medium pressure, the pressure of the external forming seal 7 is increased, the deformation amount is increased, the sealing of the upper valve cover 1 and the valve body 13 is completed, and the pressure difference between the inlet and the outlet of the valve is downward due to the increase of the medium pressure inside the valve body 13, the medium pushes down balance cylinder 8 with sleeve 10, valve seat 11 wholly, extrudes graphite winding 12 and forms sealedly, accomplishes the lower part of valve and seals, and seal member piston ring 14 between balance cylinder 8 and valve plug 9 is along with the increase of medium pressure, and piston ring 14 inflation pressure is big more, and the deflection is big more, guarantees that balance cylinder 8 and valve plug 9 seal better.

The following examples are carried out on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[ examples ] A method for producing a compound

As shown in fig. 1, according to design requirements, parts such as an upper valve cover 1, a plug 2, a set screw 3, a pressure ring 4, a split retainer ring 5, an inner formed sealing gasket 6, an outer formed sealing gasket 7, a balance cylinder 8, a valve plug 9, a sleeve 10, a valve seat 11, a graphite wound gasket 12, a valve body 13, a piston ring 14, a valve rod 15 and the like are processed.

As shown in figure 1, the valve seat 11, the sleeve 10 and the balance cylinder 8 are sequentially installed in the valve body 13, the graphite winding pad 12 is sealed between the valve body 13 and the valve seat 11, the sleeve 10 and the balance cylinder 8 are in stop connection in series.

As shown in fig. 1, the valve rod 15 is bolted with the valve plug 9 and then fixed by spot welding, the piston ring 14 is installed at the sealing opening of the valve plug 9, and the whole valve is movably installed in the valve body 13.

As shown in fig. 1, the upper valve cover 1 passes through the valve rod 15 to cover, the split retainer ring 5 and the outer formed sealing gasket 7 are assembled on the positioning sealing position between the upper valve cover 1 and the valve body 13, meanwhile, the screw plug 2, the set screw 3, the pressing ring 4 and the inner formed sealing gasket 6 are assembled on the positioning sealing position between the upper valve cover 1 and the balance cylinder 8, and the whole valve body is fixedly connected.

And (3) connecting a water pipe, carrying out a hydrostatic test, then testing the tightness of the sleeve regulating valve, then opening the valve to test the adjustability of the sleeve regulating valve, and finally purging, sealing and storing for later use.

The utility model discloses in use, simple structure, convenient to use, the application is strong, and it is convenient to change, has saved a large amount of bolted connections, has reduced operating personnel's intensity of labour, has saved the change expense, and self sealss structure strengthens along with medium pressure's increase simultaneously, and the leakproofness of valve is better, and life is longer.

Claims (6)

1. A high-temperature high-pressure sleeve type self-sealing structure regulating valve comprises an upper valve cover, a plug, a set screw, a pressure ring, a split retainer ring, an outer forming seal gasket, an inner forming seal gasket, a balance cylinder, a valve plug, a sleeve, a valve seat, a graphite winding gasket, a valve body, a piston ring and a valve rod, and is characterized in that the valve rod is in threaded connection with the valve plug and then is prevented from loosening by spot welding, the upper end of the valve rod is connected with an execution mechanism, the valve rod and the valve plug form a movable component of the valve, the valve seat, the sleeve and the balance cylinder are sequentially arranged in the valve body, the balance cylinder, the sleeve and the valve seat are in limiting series connection with a spigot, which are mutually positioned and constrained, the valve seat is arranged on the plane of the valve body, the valve plug is sequentially in clearance fit with the balance cylinder and the sleeve when moving downwards, a conical sealing surface at the bottom of the valve plug is matched with a conical surface of the valve seat, the valve seat is positioned at the lower part of the valve body, and the valve seat and the valve body are statically sealed by the graphite winding gasket, two piston ring seals are arranged between the valve plug and the balance cylinder, the upper valve cover passes through the valve rod cover and is arranged on the valve body, the wedge-shaped surface of the outer forming sealing gasket is in contact fit with the positioning sealing surface of the upper valve cover, the split retaining ring is arranged on the outer forming sealing gasket, the flange of the split retaining ring is in installation fit with the valve body, the upper valve cover and the valve body form self-sealing by utilizing an outer forming sealing gasket, a set screw passes through the upper valve cover and is screwed into the valve body, the top of the set screw is provided with a plug for positioning, the bottom end of the set screw presses a pressing ring to downwards press the inner forming sealing gasket, the inner forming sealing gasket is in contact seal with the wedge-shaped sealing surface of the balance cylinder, the upper valve cover and the balance cylinder form self-sealing by utilizing an inner forming sealing gasket, meanwhile, the sealing area limited by the seal of the balance cylinder and the upper valve cover is larger than the sealing area limited by the valve plug and the valve seat, the split retaining ring and the outer forming sealing gasket are combined to form the upper valve cover and are positioned outside the valve body, the inner forming sealing gasket, the upper valve cover and the balance cylinder are positioned outside the valve body, The upper valve cover and the balance cylinder are positioned in the balance cylinder by the compression ring, the set screw and the plug combination, and the two positioning components are connected in a positioning manner by the whole valve structure.

2. The high temperature and pressure sleeve-type self-sealing regulating valve as claimed in claim 1, wherein the outer and inner formed gaskets are wedge-shaped seals with an angle of 30 ° to 45 °.

3. The high temperature and high pressure sleeve-type self-sealing regulating valve as claimed in claim 1, wherein the outer and inner formed gaskets are made of graphite wire with nickel.

4. The high temperature, high pressure sleeve-type self-sealing regulator valve as claimed in claim 1, wherein the pressure of said outer and inner shaped gaskets is derived from the pressure of the medium.

5. The sleeve-type self-sealing regulating valve with high temperature and pressure as claimed in claim 1, wherein the split retainer ring has a 4-piece structure.

6. The high temperature and pressure sleeve-type self-sealing regulating valve as claimed in claim 1, wherein the sleeve valve medium is a liquid.

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