KR102422682B1 - Quick opening mechanism of quick opening high temperature spherical sealing shutoff valve - Google Patents

Abstract

The present invention discloses a quick-open mechanism of a quick-opening high-temperature spherical seal shut-off valve, which relates to the field of valves, comprising a valve body, a valve seat, a valve cover, a valve disk, a valve stem and a driving device for driving the valve stem to rotate. In this case, the valve stem and the valve disk are installed and fixedly connected to each other, and the valve body and the valve cover are provided with an air discharge channel for circulating gas, and the valve disk and the valve seat are located in the path of the air discharge channel. and the valve seat is fixedly mounted to the valve body and provided with a first through hole passing through the air discharge channel, the valve disk is provided with a second through hole corresponding to the first through hole, and the air discharge channel is a valve When the disk rotates, it has three states: open when the first through hole and the second through hole overlap each other, semi-open when partially overlapping, and closed when not overlapping. The present invention has the advantage that the reduced pressure fractionation effect is excellent.

Description

Quick opening mechanism of quick opening high temperature spherical sealing shutoff valve

FIELD OF THE INVENTION The present invention relates to the field of valves, and more particularly, to a quick-open mechanism of a quick-opening high-temperature spherical seal shut-off valve.

The conventional high-temperature shut-off valve is used in the scenario where the medium is high-temperature argon gas, the medium temperature is 730℃, the medium pressure is 3MPa, and according to the valve pressure-temperature level comparison, it is DN80, Class1500. Conventional pneumatic, hydraulic, electromagnetic and explosion types of shut-off valves cannot all solve the high pressure problem that occurs when shutting off, so this problem always affects the service life.

In order to overcome the disadvantages of the background art, the present invention provides a quick-open mechanism of a quick-opening high-temperature spherical sealing shut-off valve with excellent reduced-pressure fractionation effect.

The technical solution used by the present invention is a quick-open mechanism of a quick-opening high-temperature spherical sealing shut-off valve, comprising a valve body, a valve seat, a valve cover, a valve disk, a valve stem and a driving device for driving the valve stem to rotate. , the valve stem and the valve disc are coaxially installed and fixedly connected, the valve body and the valve cover are provided with an air discharge channel for circulating gas, and the valve disc and the valve seat are located in the path of the air discharge channel, , the valve seat is fixedly mounted to the valve body and provided with a first through hole passing through the air discharge channel, the valve disk is provided with a second through hole corresponding to the first through hole, and the air discharge channel is a valve disk rotates and has three states: open when the first and second through holes overlap, semi-open when partially overlapping, and closed when not overlapping.

A first inlet for introducing an airflow is installed on the upper surface of the valve cover, a second inlet communicating with the lower portion of the first inlet is installed, and a third inlet symmetrical to the first inlet in the circumferential direction is installed in the valve cover. installed, wherein the third inlet does not communicate with the upper surface of the valve cover, and a first annular groove is provided between the first inlet and the third inlet to communicate both;

A first outlet for discharging the airflow is installed on the lower surface of the valve body, a second outlet communicating with the upper side of the first outlet is installed, and the valve body has a third outlet symmetrical to the first outlet in the circumferential direction installed, wherein the third outlet does not communicate with the lower surface of the valve body, and a second annular groove is provided between the first outlet and the third outlet to communicate both;

The second through hole and the first through hole are all symmetrically distributed in the circumferential direction, and the first inlet, first outlet, one second through hole, and one first through hole four correspond to each other and communicate with each other to form an air discharge channel. and the second inlet, the second outlet, the other first through hole and the other second through hole four correspond to each other and communicate with the first annular groove and the second annular groove to form a fractionation channel for decompression classification .

Both the first through hole and the second through hole use an arc-shaped hole, the included angle of the first through hole is 11.1°, and the included angle of the second through hole is 66.6°.

The valve disk includes a disk body and a cover plate, and mounting grooves for mounting the cover plate are respectively installed on upper and lower opposite sides of the disk body, and a central hole for accommodating a horizontal tube is installed in the disk body, and the cover A spherical seal is used between the plate and the mounting groove.

Each surface of the valve disc in contact with the valve seat and valve cover is sprayed with a metal film layer.

The first annular groove and the second annular groove are each two and are symmetrically distributed in the circumferential direction.

The metal film layer is tungsten carbide.

The valve stem includes an upper valve stem and a lower valve stem, both of which are fixed to upper and lower sides of the center of the valve disk, the upper valve stem and the valve disk are both installed in a hollow and communicated with both, and the upper valve stem has a valve stem core assembly inserted therein and coaxially installed;

A lip sealing ring is installed between the lower valve stem and the valve body, between the valve stem core assembly and the upper valve stem, and between the upper valve stem and the valve cover, and is filled with lubricating sealing grease.

An upper bracket is mounted to the valve cover, the upper valve stem is rotatably mounted to the upper bracket, and an anti-rotation plate is installed between the valve stem core assembly and the upper bracket to connect them and bend them.

A connection cap is installed on the upper valve stem, the connection cap surrounds the valve stem core assembly, and a rotational coupling is used between the two, and a pointer is mounted on the valve stem core assembly, and a pointer is mounted on the outer surface of the connection cap. For this purpose, a color code corresponding to the pointer is installed.

Advantageous effects of the present invention are as follows. In this technical solution, the driving device drives the valve stem to rotate, the valve stem also drives the valve disk to rotate in a chamber formed in the valve cover and the valve seat, and when the valve disk rotates, the second through hole is air exhausted Three states of overlapping, partially overlapping, and non-overlapping of the channel are generated, and these three states correspond to the opening, partial opening and closing of the shut-off valve of the present invention, respectively, to the hot argon gas passing through the air exhaust channel. It has the advantages of providing continuous interval injection for the

BRIEF DESCRIPTION OF THE DRAWINGS It is a structural schematic diagram of the quick opening mechanism of the quick opening high temperature spherical sealing shut-off valve of the embodiment of this invention.
2 is a plan view of a valve cover;
3 is a cross-sectional view taken along line AA of FIG. 2 .
4 is a cross-sectional view taken along line BB of FIG. 3 .
5 is a plan view of the valve seat;
6 is a cross-sectional view taken along CC of FIG. 5 .
7 is a plan view of the valve disk;
FIG. 8 is a cross-sectional view of DD of FIG. 7 .
9 is a cross-sectional view of the valve body;
FIG. 10 is a cross-sectional view of EE of FIG. 9 .
11 is a structural schematic diagram of a valve stem, a valve disk, and a valve stem core assembly.
12 is a square wave diagram of the switching time of a high temperature quick opening spherical sealing shutoff valve.
13 is a partially enlarged view of A of FIG. 1 .

Hereinafter, an embodiment of the present invention will be further described with reference to the accompanying drawings.

As shown in the figure, in the quick opening mechanism of the quick opening high temperature spherical seal shutoff valve, the valve body (1), the valve seat (2), the valve cover (3), the valve disk (4), the valve stem (5) and a driving device (6) for driving the valve stem (5) to rotate, wherein the valve stem (5) and the valve disk (4) are installed and fixedly connected to each other, and the valve body (1) and the valve cover (3) is provided with an air discharge channel through which the gas flows, the valve disk 4 and the valve seat 2 are located in the path of the air discharge channel, and the valve seat 2 is the valve body 1 ) and a first through hole 21 that penetrates through the air exhaust channel is installed, and the valve disk 4 is provided with a second through hole 41 corresponding to the first through hole 21, and the air The discharge channel has three states: open when the valve disk 4 rotates and the first through hole 21 and the second through hole 41 overlap, semi-open when partially overlapping, and closed when not overlapped. Have; In this technical solution, the driving device drives the valve stem to rotate, the valve stem also drives the valve disk to rotate in the chamber formed in the valve cover and the valve seat, and when the valve disk rotates, the second through hole is air exhausted Three states of overlapping, partially overlapping, and non-overlapping of the channel occur, and these three states correspond to the opening, partial opening and closing of the shut-off valve of the present invention, respectively, and are directed to the hot argon gas passing through the air exhaust channel. It provides continuous interval injection for the

The present technical solution further discloses a high temperature quick opening spherical sealing shutoff valve, comprising a valve body (1), a valve seat (2), a valve cover (3), a valve disc (4), a valve stem (5) and a valve stem ( 5) a drive device (6) that drives the valve to rotate, wherein the valve stem (5) is equipped with a friction adjusting mechanism for adjusting the friction force between the valve disc (4) and the valve seat (2);

The valve stem 5 and the valve disk 4 are coaxially installed and fixedly connected, and the valve body 1 and the valve cover 3 are provided with an air exhaust channel for circulating gas, and the valve disk 4 ) and the valve seat 2 are located in the path of the air discharge channel, and the valve seat 2 is fixedly mounted to the valve body 1 and provided with a first through hole 21 penetrating through the air discharge channel, , The valve disk 4 is provided with a second through hole 41 corresponding to the first through hole 21, and the valve disk 4 rotates in the air discharge channel, and the first through hole 21 and the second The through hole 41 has three states: open when overlapping, semi-opening when overlapping partially, and closed when not overlapping, in this technical solution, the driving device drives the valve stem to rotate, and the valve stem also drives the valve disk to rotate in the chamber formed in the valve cover and the valve seat, and when the valve disk rotates, the second through hole generates three states of overlapping, partially overlapping and non-overlapping with the air exhaust channel, These three states correspond to the opening, partial opening, and closing of the shut-off valve of the present invention, respectively, and provide continuous interval injection of hot argon gas passing through the air discharge channel, excellent working stability, and excellent decompression fractionation effect. It has excellent advantages.

The drive device uses a motor and drives the valve stem and valve disk to rotate, the valve disk has two arc-shaped second through holes, and the valve seat has two first through holes, the outer arc and inner arc of radius is respectively equal to the radius of the second aperture of the valve disc, when the valve disc rotates, when the first aperture of the valve seat overlaps the second aperture of the valve disc, air flow can pass through, and the valve opens become; When partially overlapped, it is referred to as semi-open or semi-closed; If not fully overlapped, it is referred to as closure; The opening and closing of the valve is determined according to whether the first through hole of the valve seat and the second through hole of the valve disc overlap.

A first inlet 31 for introducing an air flow is installed on the upper surface of the valve cover 3 , and a second inlet 32 communicating with the lower portion of the first inlet 31 is installed, and the valve cover 3 ) is provided with a third inlet 33 symmetrical to the first inlet 31 in the circumferential direction, and the third inlet 33 does not communicate with the upper surface of the valve cover 3 , and the first inlet 31 ) and the third inlet (33) is provided with a first annular groove (34) for communicating both;

A first outlet 11 for discharging an airflow is installed on a lower surface of the valve body 1 , and a second outlet 12 communicating with the first outlet 11 is installed above the first outlet 11 , and the valve body 1 ) is provided with a third outlet 13 that is symmetrical to the first outlet 11 in the circumferential direction, and the third outlet 13 does not communicate with the lower surface of the valve body 1, and the first outlet 11 ) and the third outlet 13 is provided with a second annular groove 14 for communicating both;

The second through hole 41 and the first through hole 21 are all symmetrically distributed in the circumferential direction, and the first inlet 31 , the first outlet 11 , one second through hole 41 and one The four first through holes 21 correspond to each other and communicate with each other to form an air discharge channel, and the second inlet 32 , the second outlet 12 , the other first through hole 21 and the other second The four through holes 41 correspond to each other and communicate with the first annular groove 34 and the second annular groove 14 to form a fractionation channel for decompression fractionation; The fractionation channel of the valve cover and the valve body are both auxiliary channels, and have the function of fractionation and pressure equalization, and the hot gas enters the first inlet of the valve cover from the upper pipe, and there are two flow directions after the first inlet, One flow direction flows directly from the second inlet 32 down to the upper plane of the valve disk, and a second flow direction flows through the first annular groove to the third inlet and then to the valve disk, where the first annular groove There are two When the airflow of the first inlet and the third inlet communicate with the second through hole of the valve disc, the airflow flows through the valve disc into the first through hole of the valve seat, and again through the second annular groove of the valve body It flows to the first outlet and is finally discharged to act as a decompression fractionation.

the first through hole 21 and the second through hole 41 both use arc-shaped holes, the included angle of the first through hole 21 is 11.1°, and the included angle of the second through hole 41 is 66.6°;

5ms의 반개방 시간, 180°-66.6°×0.45=51.03

51ms의 폐쇄 시간이 필요하다. The valve drive device chooses electromagnetic speed control three-phase asynchronous motor, the speed control range is 125 times/minute-1250 times/minute; When the second aperture of the valve disc and the first aperture of the valve seat fully overlap, the valve is fully open, when partially overlapped, the valve is half-opened or semi-closed, when not fully overlapped, the valve is closed, and the valve disc Since the two second through-holes of and the two first through-holes of the valve seat are both symmetrically distributed in the circumferential direction, it is sufficient to calculate the degree of coincidence of one approximate square hole. the included angle of the second aperture of the valve disk is 66.6°, the included angle of the first aperture of the valve seat is 11.1°, and the fully open included angle is 66.6°-11.1°×2=44.4°; The valve function of this embodiment is a fully open time of 20 ms, rotation time per degree of 20 ms ÷ 44.4° = 0.45 ms/degree, 0.45 × 11.1 = 4.995

Half-open time of 5 ms, 180°-66.6°×0.45=51.03

A closing time of 51 ms is required.

The calculation of the motor rotation speed is as follows. The motor pulley and the valve stem pulley have the same diameter, so the speed of both is the same. The valve stem and the valve disk rotate synchronously as one piece. The time the valve disk rotates one revolution is 360÷44.4×0.02=0.162 seconds, the number of revolutions per minute is 60÷0.162=370 times/minute, the valve opening time required by the customer is 0.02 seconds, and the closing time is 0.05 seconds Satisfying the smaller high demands. 12, the valve stem 5 includes an upper valve stem 52 and a lower valve stem 53, both of which are fixed on upper and lower sides of the center of the valve disc 4, and the upper The valve stem 52 and the valve disc 4 are both hollow and are in communication with each other, and the upper valve stem 52 is provided with a valve stem core assembly 7 inserted therein and installed coaxially, the valve The upper end of the stem core assembly 7 and the upper end of the upper valve stem 52 are sealedly coupled, and an inlet pipe 71 and an outlet pipe 72 are installed at the upper end of the valve stem core assembly 7, and the inner A pipeline is installed for inflow and outflow of cooling water into and out of the upper valve stem and valve disc to cool the upper valve stem and valve disc.

The pipeline includes an inlet channel 73 and an outlet channel 74 , the inlet channel 73 being located at the central position of the axis of the valve stem core assembly 7 and extending at the distal end inside the valve disc 4 . a horizontal pipe 75 is installed, a gap is installed between the circumferential surface of the valve stem core assembly 7 and the inner wall of the valve stem 5, and the outlet water An outlet hole 76 for communicating the channel 74 is installed, the cooling water enters the inlet channel from the inlet pipe, and goes down all the way into the valve disc through the horizontal pipe, and after cooling the valve disc, the cooling water gradually flows into the valve disc After entering the gap between the inner wall of the upper valve stem and the valve stem core assembly, it enters the water outlet channel from the water outlet hole, and is finally discharged from the water outlet pipe.

The valve body (1) and the valve cover (3) are all sealed mounted with a steel plate (8), and a gap is provided between the steel plate (8) and the valve body (1) and the valve cover (3), respectively, A plurality of pipe connection ports 81 for introducing and discharging cooling water are installed on the steel plate 8, and the cooling water enters from one side and flows out from the other side, absorbs heat on the way, lowers the temperature, and cools the valve body and valve cover It works.

A sealing ring 9 is installed between the valve disk 4, the valve cover 3, and the valve seat 2, respectively, and the sealing ring 9 has an inner and an oil injection hole 91 for communicating the sealing ring 9 is installed in the valve cover 3 and the valve seat 2 including the outside; When the valve disk rotates at high speed, it rubs against the sealing ring of the valve cover and the valve seat in plane, and in order to reduce the friction coefficient, the friction is changed to lubricating friction, so that the lubricant is applied to the sealing surface of the valve seat and the valve cover. flowing, the sealing surface is machined with an R-shaped oil storage tank, not shown; Glass oil cups should be placed on both the valve cover and the outside of the valve seat, and if there is no oil, replenish immediately; The oil cup must be placed in a horizontal position above the sealing surface so that the lubricant can enter the sealing surface by gravity.

The valve disk 4 includes a disk body 42 and a cover plate 43, and mounting grooves 44 for mounting the cover plate 43 are installed on both upper and lower sides of the disk body 42, respectively. , a spherical seal is used between the cover plate 43 and the mounting groove 44, and as shown in FIG. 13, the disk body 41 is provided with a central hole 45 for accommodating a horizontal tube; A metal film layer 46 is sprayed on each surface of the valve disc 4 in contact with the valve seat 2 and the valve cover 3; The metal film layer 46 uses tungsten carbide, and due to the high-speed rotation of the valve disc and valve seat, valve cover sealing pair, the sealing surface uses ultrasonic spray welding WC hard material, the hardness is HRC60 or more, the hardness is has a high and wear-resistant action, and in this embodiment, after inserting the horizontal tube of the valve stem core assembly into the central hole, and fixing the cover plate to the mounting groove through the bolt, it is located on the upper surface of the valve stem and the disk body The cover plate is fixed through welding so that the valve disc and the valve stem are integrally formed.

An upper bracket 35 is mounted on the valve cover 3 , a lower bracket 15 is mounted on the valve body 1 , and the upper valve stem 52 is rotatably connected to the upper bracket 35 . is mounted, the lower valve stem 53 is rotatably mounted to the lower bracket 15 , and the friction control mechanism is mounted between the lower bracket 15 and the lower valve stem 53 , and the friction control The mechanism includes a plurality of adjustment seats (10) and a check nut (101), the adjustment seat (10) is rotatably coupled to the outer periphery of the lower valve stem (53), the adjustment seat (10) The outer periphery and the lower bracket 15 are screwed together, and the lower bracket 15 is equipped with a rotation preventing block 102 corresponding to the adjustment seat 10; The rotation speed of the valve disk is very high, about 370 times/min, the sealing surfaces of the valve disk and the valve seat rub against each other during the opening and closing of the valve, and the magnitude of the friction force is directly proportional to the positive pressure and the coefficient of friction; In order to reduce the positive pressure, it is necessary to adjust the gap between the two sealing pairs, and when the gap is large, the friction force is small, it is easy to leak, and the valve cannot be sealed; When the gap is small or there is no gap, the friction force is increased, and the ideal state is that the gap can be rubbed, but the friction force is adjusted to be very small; This embodiment can pull the lower valve stem up and down through the adjustment seat; By adjusting the sealing pair gap between the valve disk and the valve seat, the effect of adjusting the sealing friction force of the valve disk can be achieved.

a connecting cap 51 is installed on the upper valve stem 52, and the connecting cap 51 surrounds the valve stem core assembly 7;

Thrust ball bearings 103 are respectively installed between the adjustment seat 10 and the lower valve stem 53 and between the connecting cap 51 and the valve stem core assembly 7;

A deep groove ball bearing 104 is installed between the upper valve stem 52 and the upper bracket 35; All of these ball bearings must be greased and lubricated when installed.

Between the lower valve stem (53) and the valve body (1), between the valve stem core assembly (7) and the upper valve stem (52), and between the upper valve stem (52) and the valve cover (3), a lip sealing ring (105) ) installed, filled with lubricating sealing grease, to reduce the friction force of the high-speed rotating sealing pair, add oil lubricant to the sealing surface to reduce the friction coefficient, so that it is easy to rotate, prolongs the service life; Since the upper valve stem rotates at high speed in the valve cover and the lower valve stem rotates at high speed in the valve body, in order to prevent external exposure of high-temperature and high-pressure gas, the quick-opening valve must be equipped with a mechanical sealing ring, and each set contains three reinforced high-temperature RPTFE rib sealing rings with a skeleton, and an O-shaped sealing ring made of fluororubber material is added to the outside of each rib sealing ring. Fill the lip sealing ring with molybdenum disulfide high temperature lubricant.

The horizontal pipe 75 uses a hollow shaft, and the circumferential surface of the inflow channel 73 and the horizontal pipe 75 communicates with each other.

The valve stem core assembly includes a hollow main pipe (78) and a hollow branch pipe (77), inserting the hollow branch pipe into the hollow main pipe (78) with a gap therebetween, to obtain the hollow branch pipe It is used as a channel, and the gap between the hollow branch pipe and the hollow main pipe 78 is used as an outlet channel.

An upper bracket 35 is mounted on the valve cover 3 , the upper valve stem 52 is rotatably mounted on the upper bracket 35 , and the valve stem core assembly 7 and the upper bracket 35 are rotatably mounted. ) between the two are connected and the anti-rotation plate 351 is installed to be bent; When the lip ring and the upper valve stem rotate, friction is generated and torque is created, and there is a coolant pipe joint and connecting pipe at the top of the valve stem core assembly, which does not allow rotation of the valve stem core assembly, so the upper bracket and Install the anti-rotation plate on top of the valve stem core.

A connecting cap 51 is installed on the upper valve stem 52 , and the connecting cap 51 surrounds the valve stem core assembly 7 and uses a rotational coupling between the two, and The color code corresponding to the pointer is installed on the outer surface for recognition, and to stop the valve in the closed position, the pointer is mounted on the upper part of the valve stem core assembly, and red and blue are located at the corresponding positions of the outer circle of the connecting cap. etc. are painted in different color codes.

In the description of the present invention, the terms “central”, “longitudinal”, “transverse”, “top”, “bottom”, “front”, “after”, “left”, “right”, “vertical”, “ The orientation or positional relationship indicated by “horizontal”, “top”, “bottom”, “inside”, “outside”, etc. is based on the orientation or positional relationship shown in the drawings, and is merely for explaining the present invention and simplifying the description. It should be understood that it should not be construed as limiting the present invention, as it does not indicate or imply that the device or element to be displayed must have a specified direction and be configured and operated in the specified direction. In addition, the terms “first” and “second” are used only for the purpose of description and should not be construed as indicating or implying relative importance.

In the description of the present invention, the terms “mounted”, “connected to each other”, “connected”, “fixed”, etc. are to be understood in a broad sense unless otherwise clearly defined or limited. , for example, may be fixedly connected, detachably connected, or integrally connected; may be mechanically connected or electrically connected; It may be directly connected, it may be indirectly connected through an intermediate medium, or it may be a communication between the two elements. For those of ordinary skill in the art, specific meanings of the terms in the present invention can be understood based on specific circumstances. In addition, unless otherwise specified in the description of the present invention, the meaning of “a plurality” is two or more than two.

Each engineer has described the present invention according to the above specific embodiments, but it should be understood that the inventive concept of the present invention is not limited to the present invention, and all modifications using the inventive concept are included in the scope of protection of the patent right of this patent.

Claims (10)

Quick opening comprising a valve body (1), a valve seat (2), a valve cover (3), a valve disc (4), a valve stem (5) and a drive device (6) that drives the valve stem (5) to rotate A rapid opening mechanism of a high-temperature spherical sealing shut-off valve, comprising:
The valve stem 5 and the valve disk 4 are coaxially installed and fixedly connected, and the valve body 1 and the valve cover 3 are provided with an air exhaust channel for circulating gas, and the valve disk 4 ) and the valve seat 2 are located in the path of the air discharge channel, the valve seat 2 is fixedly mounted to the valve body 1 and a first through hole 21 penetrating through the air discharge channel is installed, , The valve disk 4 is provided with a second through hole 41 corresponding to the first through hole 21, and the valve disk 4 rotates in the air discharge channel, and the first through hole 21 and the second The through hole 41 has three states: open when overlapping, semi-open when partially overlapping, and closed when not overlapping,
A first inlet 31 for introducing an airflow is installed on the upper surface of the valve cover 3 , and a second inlet 32 communicating with the lower portion of the first inlet 31 is installed, and the valve cover 3 ) is provided with a third inlet 33 symmetrical to the first inlet 31 in the circumferential direction, the third inlet 33 does not communicate with the upper surface of the valve cover 3, and the first inlet 31 ) and the third inlet (33) is provided with a first annular groove (34) for communicating both;
A first outlet 11 for discharging an airflow is installed on a lower surface of the valve body 1 , and a second outlet 12 communicating with the first outlet 11 is installed above the first outlet 11 , and the valve body 1 ) is provided with a third outlet 13 symmetrical to the first outlet 11 in the circumferential direction, and the third outlet 13 does not communicate with the lower surface of the valve body 1, and the first outlet 11 ) and the third outlet 13 is provided with a second annular groove 14 for communicating both;
The second through hole 41 and the first through hole 21 are all symmetrically distributed in the circumferential direction, and the first inlet 31 , the first outlet 11 , one second through hole 41 and one The four first through holes 21 communicate with each other to form an air discharge channel, and the second inlet 32 , the second outlet 12 , the other first through hole 21 and the other second The four through holes 41 correspond to each other and communicate with the first annular groove 34 and the second annular groove 14 to form a fractionation channel for decompression fractionation. machine. According to claim 1, wherein the first through-hole (21) and the second through-hole (41) both use an arc-shaped hole, the included angle of the first through-hole (21) is 11.1 °, the second through-hole (41) The quick-opening mechanism of the quick-opening high-temperature spherical sealing shut-off valve, characterized in that the narrow angle is 66.6°. According to claim 1, wherein the valve disk (4) includes a disk body (42) and a cover plate (43), the upper and lower both sides of the disk body (42) mounting grooves for mounting the cover plate (43) ( 44) are respectively installed, and a center hole 45 for accommodating a horizontal tube is installed in the disk body 42, and a spherical seal is used between the cover plate 43 and the mounting groove 44. A quick-opening mechanism of a fast-opening high-temperature spherical sealing shut-off valve. 4. The quick-opening high-temperature spherical sealing shut-off valve according to claim 3, characterized in that each surface of the valve disc (4) in contact with the valve seat (2) and the valve cover (3) is sprayed with a metal film layer (46). of the rapid opening mechanism. The quick opening mechanism of a quick opening high temperature spherical seal shutoff valve according to claim 1, characterized in that the first annular groove (34) and the second annular groove (14) are each two and are symmetrically distributed in the circumferential direction. 5. The quick opening mechanism of a quick opening high temperature spherical seal shutoff valve according to claim 4, characterized in that the metal film layer (46) is tungsten carbide. 2. The valve stem (5) according to claim 1, wherein the valve stem (5) comprises an upper valve stem (52) and a lower valve stem (53), both of which are fixed on both upper and lower sides of the center of the valve disk (4), the upper valve stem (52) and the valve disk (4) are both hollow and communicated, and the upper valve stem (52) is provided with a valve stem core assembly (7) inserted therein and installed coaxially;
Between the lower valve stem (53) and the valve body (1), between the valve stem core assembly (7) and the upper valve stem (52), and between the upper valve stem (52) and the valve cover (3), a lip sealing ring (105) ) is installed, and the quick opening mechanism of the fast opening high temperature spherical sealing shutoff valve, characterized in that it is filled with lubricating sealing grease. 8. The valve stem core assembly (7) according to claim 7, wherein an upper bracket (35) is mounted on the valve cover (3), and the upper valve stem (52) is rotatably mounted on the upper bracket (35). ) and the upper bracket (35), connecting both and a fast opening mechanism of a fast opening high temperature spherical sealing shut-off valve, characterized in that the anti-rotation plate (351) is installed to be bent. The method according to claim 7, wherein a connecting cap (51) is installed on the upper valve stem (52), the connecting cap (51) surrounds the valve stem core assembly (7) and a rotational coupling is used between the two, and the A pointer 79 is mounted on the valve stem core assembly 7, and a color code corresponding to the pointer is installed on the outer surface of the connection cap 51 for recognition. quick opening mechanism. delete

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