CN210716079U

CN210716079U - High-temperature solid-phase material plug valve

Info

Publication number: CN210716079U
Application number: CN201921229288.4U
Authority: CN
Inventors: 张先勇
Original assignee: Yangtze University
Current assignee: Yangtze University
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-06-09
Anticipated expiration: 2029-07-31

Abstract

The utility model provides a high temperature solid phase material plug valve, includes entry transition pipe, valve body, case, drive arrangement, export takeover, a plurality of graphite ring I, a plurality of graphite ring II, backing ring, a plurality of rectangular spring, graphite ring gland, a plurality of sealing fillet, a flange, No. two flange of valve body, a plurality of position sleeve I, spacing support, drive flange and a plurality of position sleeve II. The utility model discloses the biggest advantage lies in having solved the high temperature seal problem through combined seal structure, possesses the good performance of leaking outward and preventing interior leaking simultaneously.

Description

High-temperature solid-phase material plug valve

Technical Field

The utility model relates to a material feeding, the mechanical field of unloading especially relate to a high temperature solid phase material plug valve.

Background

In the industries of metallurgy, coal, chemical industry, environmental protection and the like, a material valve is indispensable important equipment in the process of feeding, discharging or conveying high-temperature solid-phase materials (ash, slag and solid-phase particles). The sealing performance of the material valve in a high-temperature environment is always a key problem which troubles the use. At present, high-temperature material valves, such as a high-temperature material flap valve, a high-temperature star-shaped discharge valve, a high-temperature knife gate valve or a gate valve, are widely applied to occasions with low sealing requirements. Because available sealing modes and sealing materials are limited in a high-temperature environment, in order to improve the sealing effect, more high-temperature material valves assist sealing by means of the accumulation (also called as material sealing) of materials at a valve opening at present; there is also a type of valve that introduces a gas under pressure at the valve port or seal to assist the seal (also referred to as a "gas seal"). These measures can improve the sealing effect, but also have the problems of unstable operation, low reliability, or inconvenient use due to the need of external auxiliary equipment. Under the conditions that the temperature is as high as about 500 ℃ and the requirements on external leakage and internal leakage are high, the material valves of the types are difficult to meet the use requirements or inconvenient to use. In addition, the sealing surfaces of the material valves are small, and the problems that the sealing surfaces are seriously abraded in long-time high-temperature operation exist, so that the sealing pressure is reduced, the long-time operation sealing reliability is poor, and the like.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a high temperature solid phase material plug valve to high temperature material leakproofness problem, through forcing the sealed mode, has great sealed face and longer sealed route simultaneously, has solved material valve outside under the high temperature environment effectively and has leaked and inside leakage scheduling problem.

The utility model discloses an entry transition pipe and valve body, entry transition pipe and valve body are linked together, the valve body comprises valve body connecting pipe and valve body pipe, the valve body connecting pipe is linked together its characterized in that with entry transition pipe and valve body pipe: the valve core, the driving device and the outlet connecting pipe are also included;

the valve core is a hollow pipe which is coaxial with the valve body pipe, the valve core comprises a first valve core pipe and a valve core shaft which are coaxial, the outer diameter of the valve core shaft is smaller than that of the first valve core pipe, and the outer diameter of the first valve core pipe is smaller than the inner diameter of the valve body pipe;

the valve core shaft is connected with the driving device, the inner diameter of the outlet connecting pipe is equal to that of the first valve core pipe, the bottom end of the first valve core pipe is provided with a valve core connecting piece, and the valve core connecting piece is matched and connected with the top end of the outlet connecting pipe.

Further, the valve core also comprises a second valve core pipe, the second valve core pipe is connected with the first valve core pipe and the valve core shaft up and down, the inner diameter of the second valve core pipe is the same as that of the first valve core pipe, and the outer diameter of the second valve core pipe is smaller than that of the first valve core pipe;

the outer diameter of the outlet connecting pipe is equal to that of the second valve core pipe.

Still further, also include several graphite rings I and graphite ring II;

graphite ring I and graphite ring II are the ring of coaxial setting, graphite ring I and graphite ring II's internal diameter equals with No. two case pipe external diameters, graphite ring I and graphite ring II's external diameter equals with the internal diameter of valve body pipe, graphite ring I and graphite ring II link to each other with the wedge structure, graphite ring I and graphite ring II are located between No. two case pipes and the valve body pipe and between export takeover and the valve body pipe.

Still further, the device also comprises a backing ring;

the backing ring is a circular ring arranged along the circumferential direction of the second valve core pipe, the inner diameter of the backing ring is equal to the outer diameter of the second valve core pipe, the outer diameter of the backing ring is equal to the inner diameter of the valve body pipe, the backing ring is positioned between the second valve core pipe and the valve body pipe and between the outlet connecting pipe and the valve body pipe, and the backing ring is arranged on the graphite ring I and the graphite ring II.

Still further, the spring also comprises a rectangular spring;

the rectangular springs are vertically arranged along the circumferential direction of the second valve core pipe, are positioned between the second valve core pipe and the valve body pipe and between the outlet connecting pipe and the valve body pipe, and are positioned on the backing ring.

Furthermore, the device also comprises a graphite ring gland;

the graphite ring gland is composed of a circular tube and a circular ring cover, the inner diameter of the circular tube is equal to the outer diameter of the second valve core tube, the outer diameter of the circular tube is equal to the inner diameter of the valve body tube, the circular ring cover is a hollow circular ring arranged along the circumferential direction of the second valve core tube and is vertically connected with the circular tube, and the outer diameter of the circular ring cover is larger than the outer diameter of the valve body tube;

the pipe of graphite ring gland is located between No. two case pipes and the valve body pipe and between export takeover and the valve body pipe, the pipe of graphite ring gland sets up on rectangular spring, the ring lid of graphite ring gland is located outside valve body pipe top port and the export takeover bottom port.

Still further, the sealing strip is also included;

a valve core groove is axially formed in the outer side of the first valve core pipe, the valve core groove is matched with a sealing insertion strip, and the thickness of the sealing insertion strip is larger than the distance from the outer wall of the first valve core pipe to the inner wall of the valve body pipe.

Furthermore, the valve body further comprises a first connecting flange, a second connecting flange, a plurality of positioning sleeves I, a limiting bracket, a driving connecting flange and a plurality of positioning sleeves II;

the two ends of the valve body pipe are respectively provided with a first valve body connecting flange and a second valve body connecting flange, and the circular ring covers arranged on the graphite ring pressing covers at the two ends of the valve body pipe are respectively connected with the first valve body connecting flange and the second valve body connecting flange through bolts;

a limiting support is arranged at the joint of the second valve core pipe and the valve core shaft, the limiting support is fixed on the first connecting flange of the valve body through bolts, a plurality of positioning sleeves I are sleeved outside the bolts between the limiting support and the first connecting flange of the valve body, a driving device connecting flange is arranged at the bottom of the driving device, the driving device connecting flange is fixed on the limiting support through bolts, a driving device connecting piece communicated with an inner hole of the driving device is arranged at the bottom of the driving device, the valve core shaft is inserted into the inner hole of the driving device through the driving device connecting piece, and the annular cover is positioned between the limiting support and the first connecting flange of the valve body;

an outlet connecting pipe connecting ring is arranged at the bottom end of the outlet connecting pipe along the circumferential direction, the outlet connecting pipe connecting ring is fixed on the second connecting flange of the valve body through bolts, a plurality of positioning sleeves II are sleeved outside the bolts between the outlet connecting pipe connecting ring and the second connecting flange of the valve body, and the annular cover is positioned between the outlet connecting pipe connecting ring and the second connecting flange of the valve body.

Furthermore, the bottom end of the outlet connecting pipe, the top end of the inlet transition pipe and the joint of the inlet transition pipe and the valve body connecting pipe are provided with connecting flanges.

Further, the driving device is a gear rack swing cylinder which drives the valve core to rotate through air pressure or hydraulic pressure.

The utility model has the advantages that: the plug valve for the high-temperature solid-phase material has the greatest advantage of solving the problem of high-temperature sealing, and has excellent anti-leakage and anti-inner-leakage performances through the combined sealing structure. The plug valve for high-temperature solid-phase materials has good sealing performance on materials at the temperature of 500 ℃, can bear higher sealing pressure, and has better sealing effect than common high-temperature flap valves, star-shaped dischargers, high-temperature knife gate valves or gate valves. The sealing unit of the high-temperature solid-phase material plug valve has an automatic abrasion compensation function, and is high in sealing reliability and long in service life; the valve core with the embedded seal is arranged through a reasonable installation gap, so that the problem of high-temperature locking can be avoided while the good sealing performance is ensured. Meanwhile, when the high-temperature solid-phase material plug valve is completely opened, the drift diameter of the flow channel is consistent with that of the pipeline, the flow resistance is small, and the plug valve is not easy to block.

Drawings

FIG. 1 is a schematic cross-sectional structural view of a plug valve for high-temperature solid-phase materials according to the present invention;

FIG. 2 is a schematic structural view of a plug valve for high temperature solid phase materials in a closed state according to the present invention;

FIG. 3 is a schematic view of an open state structure of a plug valve for high temperature solid phase materials according to the present invention;

FIG. 4 is a right side view schematically illustrating a plug valve for high temperature solid phase materials according to the present invention;

FIG. 5 is a schematic view of a left side of a plug valve for high temperature solid phase materials according to the present invention;

FIG. 6 is a schematic perspective view of a plug valve for high temperature solid phase materials according to the present invention;

FIG. 7 is a schematic view of a sealing unit structure of a plug valve for high temperature solid phase materials according to the present invention;

FIG. 8 is a schematic view of a valve core structure of a plug valve for high temperature solid phase materials according to the present invention;

FIG. 9 is a schematic structural diagram of a graphite ring I and a graphite ring II of the plug valve for high temperature solid phase materials provided by the present invention;

FIG. 10 is a schematic partial enlarged cross-sectional view of a plug valve for high temperature solid phase materials according to the present invention, shown in FIG. 1;

fig. 11 is a schematic partial enlarged cross-sectional structure view of a plug valve for high-temperature solid-phase materials according to the present invention, which is shown in fig. 2;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

As shown in fig. 1-11, the utility model provides a high temperature solid phase material plug valve, including entry transition pipe 1 and valve body 14, entry transition pipe 1 and valve body 14 are linked together, valve body 14 comprises valve body connecting pipe 141 and valve body pipe 142, valve body connecting pipe 141 will enter the mouth transition pipe 1 and valve body pipe 142 are linked together, its characterized in that: the valve core 10, the driving device 4 and the outlet connecting pipe 12 are also included;

the valve core 10 is a hollow pipe coaxially arranged with the valve body pipe 142, the valve core 10 comprises a first valve core pipe 101 and a valve core shaft 103 which are coaxially arranged, the outer diameter of the valve core shaft 103 is smaller than that of the first valve core pipe 101, and the outer diameter of the first valve core pipe 101 is smaller than the inner diameter of the valve body pipe 142;

a flow channel hole 1011 is formed in the side face of the first valve core pipe 101 and located at the joint of the valve body connecting pipe 141 and the valve body pipe 142, the valve core shaft 103 is connected with the driving device 4, the inner diameter of the outlet connecting pipe 12 is equal to that of the first valve core pipe 101, a valve core connecting piece 1013 is arranged at the bottom end of the first valve core pipe 101, and the valve core connecting piece 1013 is matched with and connected with the top end of the outlet connecting pipe 12.

The valve core 10 further comprises a second valve core tube 102, the second valve core tube 102 is vertically connected with a first valve core tube 101 and a valve core shaft 103, the inner diameter of the second valve core tube 102 is the same as that of the first valve core tube 101, and the outer diameter of the second valve core tube 102 is smaller than that of the first valve core tube 101;

the outer diameter of the outlet connecting pipe 12 is equal to that of the second valve core pipe 102.

Also comprises a plurality of graphite rings I8 and II 9;

the graphite ring I8 and the graphite ring II9 are coaxially arranged circular rings, the inner diameters of the graphite ring I8 and the graphite ring II9 are equal to the outer diameter of the second valve core tube 102, the outer diameters of the graphite ring I8 and the graphite ring II9 are equal to the inner diameter of the valve body tube 142, the graphite ring I8 and the graphite ring II9 are connected in a wedge-shaped structure, and the graphite ring I8 and the graphite ring II9 are located between the second valve core tube 102 and the valve body tube 142 and between the outlet connecting tube 12 and the valve body tube 142.

Also comprises a backing ring 7;

the backing ring 7 is a circular ring arranged along the circumference of the second valve core tube 102, the inner diameter of the backing ring 7 is equal to the outer diameter of the second valve core tube 102, the outer diameter of the backing ring 7 is equal to the inner diameter of the valve body tube 142, the backing ring 7 is positioned between the second valve core tube 102 and the valve body tube 142 and between the outlet connecting tube 12 and the valve body tube 142, and the backing ring 7 is arranged on the graphite ring I8 and the graphite ring II 9.

Also comprises a rectangular spring 6;

the rectangular springs 6 are vertically arranged along the circumferential direction of the second valve core pipe 102, the rectangular springs 6 are located between the second valve core pipe 102 and the valve body pipe 142 and between the outlet connecting pipe 12 and the valve body pipe 142, and the rectangular springs 6 are located on the backing ring 7.

The graphite ring gland bush is also included 5;

the graphite ring gland 5 is composed of a circular tube 51 and an annular cover 52, the inner diameter of the circular tube 51 is equal to the outer diameter of the second valve core tube 102, the outer diameter of the circular tube 51 is equal to the inner diameter of the valve body tube 142, the annular cover 52 is a hollow circular ring arranged along the circumferential direction of the second valve core tube 102 and is vertically connected with the circular tube 51, and the outer diameter of the annular cover 52 is larger than the outer diameter of the valve body tube 142;

the circular tube 51 of the graphite ring gland 5 is located between the second valve core tube 102 and the valve body tube 142 and between the outlet connection tube 12 and the valve body tube 142, the circular tube 51 of the graphite ring gland 5 is arranged on the rectangular spring 6, and the circular ring cover 52 of the graphite ring gland 5 is located outside the top end port of the valve body tube 142 and the bottom end port of the outlet connection tube 12.

Further comprising a sealing fillet 11;

a valve core groove 1012 is axially arranged on the outer side of the first valve core pipe 101, the valve core groove 1012 is matched with the sealing insertion strip 11, and the thickness of the sealing insertion strip 11 is larger than the distance from the outer wall of the first valve core pipe 101 to the inner wall of the valve body pipe 142.

The valve body connecting flange structure further comprises a first valve body connecting flange 15, a second valve body connecting flange 16, a plurality of positioning sleeves I2, a limiting bracket 3, a driving connecting flange 17 and a plurality of positioning sleeves II 13;

the two ends of the valve body 142 are respectively provided with a first valve body connecting flange 15 and a second valve body connecting flange 16, and the circular ring covers 52 arranged on the graphite ring pressing covers 5 at the two ends of the valve body 142 are respectively connected with the first valve body connecting flange 15 and the second valve body connecting flange 16 through bolts;

a limiting support 3 is arranged at the joint of the second valve core pipe 102 and the valve core shaft 103, the limiting support 3 is fixed on the first valve body connecting flange 15 through bolts, a plurality of positioning sleeves I2 are sleeved outside the bolts between the limiting support 3 and the first valve body connecting flange 15, a driving device connecting flange 17 is arranged at the bottom of the driving device 4, the driving device connecting flange 17 is fixed on the limiting support 3 through bolts, a driving device connecting piece 41 communicated with an inner hole of the driving device 4 is arranged at the bottom of the driving device 4, the valve core shaft 103 is inserted into the inner hole of the driving device 4 through the driving device connecting piece 41, and the annular cover 52 is positioned between the limiting support 3 and the first valve body connecting flange 15;

an outlet connecting pipe connecting ring 121 is circumferentially arranged at the bottom end of the outlet connecting pipe 12, the outlet connecting pipe connecting ring 121 is fixed on the second valve body connecting flange 16 through bolts, a plurality of positioning sleeves II13 are sleeved outside the bolts between the outlet connecting pipe connecting ring 121 and the second valve body connecting flange 16, and the annular cover 52 is positioned between the outlet connecting pipe connecting ring 121 and the second valve body connecting flange 16.

And the bottom end of the outlet connecting pipe 12, the top end of the inlet transition pipe 1 and the joint of the inlet transition pipe 1 and the valve body connecting pipe 141 are provided with connecting flanges.

The driving device 4 is a gear and rack swing cylinder which drives the valve core 10 to rotate through air pressure or hydraulic pressure.

High-temperature materials enter from the inlet transition pipe 1, a flow passage hole is formed in one side of the valve core 10 and is matched with the inlet of the valve body connecting pipe 141, and the valve core 10 is in a connection state (opening) as shown in fig. 2, so that the materials can flow into the valve core 10 and flow out from the outlet connecting pipe 12. Fig. 3 shows the closed state, in which the valve element 10 is rotated 180 ° with respect to the valve body 14, and the flow passage hole 1011 is located opposite to the inlet of the valve body 14. The rotation of the valve element 10 is effected by a 4-drive device (rack and pinion oscillating cylinder).

The key to the performance of the high-temperature solid-phase material cock valve is the sealing property. The sealing has two requirements, namely, the internal channel of the valve is sealed with the outside, namely, the leakage is prevented; and secondly, when the valve is in a closed state, the upstream channel and the downstream channel are sealed, namely, internal leakage is prevented. The graphite ring gland 5, the rectangular spring 6, the backing ring 7, the graphite ring I8, the graphite ring II9, the sealing insertion strip 11 and the valve core 10 form a set of sealing units.

The leakage is prevented by a sealing assembly mainly composed of a graphite ring I8 and a graphite ring II9 through the compression of a graphite ring gland 5, and the graphite ring I8 and the graphite ring II9 are of wedge-shaped structures. Under the pressing action of the graphite ring gland 5, the graphite ring I8 and the graphite ring II9 expand and are respectively clung to the outer wall of the valve core 10 and the outer wall of the valve body 14 to generate contact force, so that sealing is realized. For better sealing effect, the graphite rings I8 and II9 in the wedge structure are in multiple groups, and four groups are adopted in the example. Rectangular spring 6 and backing ring 7's effect make the graphite ring subassembly be in the state that compresses tightly all the time, and rectangular spring 6 is in compression state during initial installation, and the graphite ring may produce wearing and tearing when opening and close the operation many times, can realize automatic compensation under rectangular spring 6's effect this moment, and graphite ring gland 5 also has certain regulation stroke, when rectangular spring 6 is too lax after long-time operation, can make graphite ring gland 5 compress tightly rectangular spring 6 once more through the bolt tightening. The graphite rings I8 and II9 are made of flexible graphite materials through pressing and can resist temperature of 500 ℃.

The inner leakage prevention mainly comprises a valve core 10 and a sealing fillet 11 embedded on the valve core. The seal fillet 11 is made of tin bronze material, and is arranged in a plurality of strips along the circumferential direction of the spool 10 and penetrates to both side lands, five strips being arranged in this example (the number may be increased appropriately depending on the size of the spool diameter of 10). The enveloping surface formed by the sealing insertion strips 11 is closely matched with the inner cylindrical surface of the valve body 14, and the matching clearance is smaller than the matching clearance between the outer cylindrical surface of the valve core 10 body and the inner cylindrical surface of the valve body 14, so that the contact area of the matching surfaces is reduced, and the valve core 10 is prevented from being locked by thermal expansion under the action of high temperature. A plurality of sealing fillets 11 mate with the inner cylindrical surface of the valve body 14 and cooperate with the graphite ring faces at the shoulder of the valve core 10 to block any internal leakage paths that may occur.

The valve core 10 is of a hollow structure, materials enter the valve core from a valve port and then flow out of the butted outlet connecting pipe 12, the drift diameter of the interior of the valve core 10 is consistent with that of the outlet connecting pipe 12, the flow resistance is reduced to the maximum extent, and the materials are prevented from being accumulated; on the other hand, the hollow structure of the valve core 10 can also reduce the weight of the valve core. The inlet transition duct 1 is intended for on-site installation and may be oriented at different angles to the upstream pipeline, and this example illustrates only one orientation. For the use occasions of feeding and discharging materials only depending on the gravity of the materials, the materials are vertically arranged; if the upstream is pressure delivery, the mounting orientation can be unlimited.

The rotary motion of the valve core 10 in this example is driven by the driving device 4 (a rack and pinion swing cylinder), the rotation angle of the rack and pinion swing cylinder is 0-180 degrees, 0 degrees corresponds to a valve-open state, 180 degrees corresponds to a valve-closed state, the rack and pinion swing cylinder can be driven by air pressure/hydraulic pressure, the driving torque is large, and meanwhile, automatic control can be conveniently realized. The valve core 10 may be driven by other means, such as electric cylinder driving or lever type manual driving, which is not listed in this example.

The positioning sleeve I2 and the positioning sleeve II13 are used for adjusting the axial position of the valve core 10 during installation, so that the flow passage hole 1011 of the valve core 10 is aligned with the inlet of the valve body 14. The limiting bracket 3 on the positioning sleeve I2 is used for installing and positioning the driving device 4.

The valve body 14, the valve core 10, the backing ring 7, the inlet transition pipe 1 and the outlet connecting pipe 12 of the high-temperature solid-phase material plug valve are made of metal materials which can resist high temperature, such as stainless steel 304 and 316 or alloy steel 12CrMoR, the corrosive materials are 304 or 316, and the non-corrosive materials can be 12 CrMoR.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. The utility model provides a plug valve of high temperature solid phase material, includes entry transition pipe (1) and valve body (14), entry transition pipe (1) and valve body (14) are linked together, valve body (14) comprise valve body connecting pipe (141) and valve body pipe (142), valve body connecting pipe (141) will enter the mouth transition pipe (1) and valve body pipe (142) are linked together, its characterized in that: the valve also comprises a valve core (10), a driving device (4) and an outlet connecting pipe (12);

the valve core (10) is a hollow pipe coaxially arranged with the valve body pipe (142), the valve core (10) comprises a first valve core pipe (101) and a valve core shaft (103) which are coaxially arranged, the outer diameter of the valve core shaft (103) is smaller than that of the first valve core pipe (101), and the outer diameter of the first valve core pipe (101) is smaller than that of the valve body pipe (142);

a flow channel hole (1011) is formed in the position, located at the interface of a valve body connecting pipe (141) and a valve body pipe (142), of the side face of the first valve core pipe (101), the valve core shaft (103) is connected with the driving device (4), the inner diameter of the outlet connecting pipe (12) is equal to that of the first valve core pipe (101), a valve core connecting piece (1013) is arranged at the bottom end of the first valve core pipe (101), and the valve core connecting piece (1013) is matched with and connected with the top end of the outlet connecting pipe (12).

2. The plug valve of high temperature solid phase material of claim 1, wherein:

the valve core (10) further comprises a second valve core pipe (102), the second valve core pipe (102) is connected with the first valve core pipe (101) and the valve core shaft (103) up and down, the inner diameter of the second valve core pipe (102) is the same as that of the first valve core pipe (101), and the outer diameter of the second valve core pipe (102) is smaller than that of the first valve core pipe (101);

the outer diameter of the outlet connecting pipe (12) is equal to that of the second valve core pipe (102).

3. The plug valve of high temperature solid phase material of claim 2, wherein:

also comprises a plurality of graphite rings I (8) and a plurality of graphite rings II (9);

graphite ring I (8) and graphite ring II (9) are the ring of coaxial setting, the internal diameter of graphite ring I (8) and graphite ring II (9) equals with No. two case pipes (102) external diameter, the external diameter of graphite ring I (8) and graphite ring II (9) equals with the internal diameter of valve body pipe (142), graphite ring I (8) and graphite ring II (9) link to each other with the wedge structure, graphite ring I (8) and graphite ring II (9) are located between No. two case pipes (102) and valve body pipe (142) and between export (12) and valve body connecting pipe (142).

4. A plug valve of high temperature solid phase material according to claim 3, wherein:

also comprises a backing ring (7);

the cushion ring (7) is a circular ring arranged along the circumferential direction of the second valve core pipe (102), the inner diameter of the cushion ring (7) is equal to the outer diameter of the second valve core pipe (102), the outer diameter of the cushion ring (7) is equal to the inner diameter of the valve body pipe (142), the cushion ring (7) is positioned between the second valve core pipe (102) and the valve body pipe (142) and between the outlet connecting pipe (12) and the valve body pipe (142), and the cushion ring (7) is arranged on the graphite ring I (8) and the graphite ring II (9).

5. The plug valve of high temperature solid phase material of claim 4, wherein:

also comprises a plurality of rectangular springs (6);

the rectangular springs (6) are vertically arranged along the circumferential direction of the second valve core pipe (102), the rectangular springs (6) are positioned between the second valve core pipe (102) and the valve body pipe (142) and between the outlet connecting pipe (12) and the valve body pipe (142), and the rectangular springs (6) are positioned on the backing ring (7).

6. A plug valve of high temperature solid phase material according to claim 5, characterized in that:

the graphite ring gland bush (5);

the graphite ring gland (5) consists of a circular tube (51) and a circular ring cover (52), the inner diameter of the circular tube (51) is equal to the outer diameter of the second valve core tube (102), the outer diameter of the circular tube (51) is equal to the inner diameter of the valve body tube (142), the circular ring cover (52) is a hollow circular ring arranged along the circumferential direction of the second valve core tube (102) and is vertically connected with the circular tube (51), and the outer diameter of the circular ring cover (52) is larger than the outer diameter of the valve body tube (142);

the circular tube (51) of the graphite ring gland (5) is located between the second valve core tube (102) and the valve body tube (142) and between the outlet connecting tube (12) and the valve body tube (142), the circular tube (51) of the graphite ring gland (5) is arranged on the rectangular spring (6), and the circular ring cover (52) of the graphite ring gland (5) is located outside the top end port of the valve body tube (142) and the bottom end port of the outlet connecting tube (12).

7. The plug valve of high temperature solid phase material of claim 6, wherein:

also comprises a plurality of sealing fillets (11);

a plurality of valve core grooves (1012) are axially formed in the outer side of the first valve core pipe (101), the valve core grooves (1012) are matched with the sealing insertion strip (11), and the thickness of the sealing insertion strip (11) is larger than the distance from the outer wall of the first valve core pipe (101) to the inner wall of the valve body pipe (142).

8. A plug valve of high temperature solid phase material according to any one of claims 2 to 7, wherein:

the valve body connecting device also comprises a first valve body connecting flange (15), a second valve body connecting flange (16), a plurality of positioning sleeves I (2), a limiting bracket (3), a driving device connecting flange (17) and a plurality of positioning sleeves II (13);

a first valve body connecting flange (15) and a second valve body connecting flange (16) are respectively arranged at two ends of the valve body pipe (142), and circular ring covers (52) arranged on graphite ring pressing covers (5) at two ends of the valve body pipe (142) are respectively connected with the first valve body connecting flange (15) and the second valve body connecting flange (16) through bolts;

a limit bracket (3) is arranged at the joint of the second valve core tube (102) and the valve core shaft (103), the first connecting flange (15) of the valve body fixes the limiting bracket (3) through bolts, a plurality of positioning sleeves I (2) are sleeved outside the bolts between the limiting bracket (3) and the first connecting flange (15) of the valve body, the bottom of the driving device (4) is provided with a driving device connecting flange (17), the driving device connecting flange (17) is fixed on the limiting bracket (3) by bolts, the bottom of the driving device (4) is provided with a driving device connecting piece (41) communicated with an inner hole of the driving device (4), the valve core shaft (103) is inserted into an inner hole of the driving device (4) through the driving device connecting piece (41), the circular ring cover (52) is positioned between the limiting bracket (3) and the first connecting flange (15) of the valve body;

an outlet connecting pipe connecting ring (121) is arranged at the bottom end of the outlet connecting pipe (12) along the circumferential direction, the outlet connecting pipe connecting ring (121) is fixed on the second connecting flange (16) of the valve body through bolts, a plurality of positioning sleeves II (13) are sleeved outside the bolts between the outlet connecting pipe connecting ring (121) and the second connecting flange (16) of the valve body, and the annular cover (52) is located between the outlet connecting pipe connecting ring (121) and the second connecting flange (16) of the valve body.

9. The plug valve of high temperature solid phase material of claim 8, wherein:

and the bottom end of the outlet connecting pipe (12), the top end of the inlet transition pipe (1) and the joint of the inlet transition pipe (1) and the valve body connecting pipe (141) are respectively provided with a connecting flange.

10. The plug valve of high temperature solid phase material of claim 9, wherein:

the driving device (4) is a gear and rack swing cylinder which drives the valve core (10) to rotate through air pressure or hydraulic pressure.