CN217927258U

CN217927258U - Electric full-bore double-eccentric half-ball valve

Info

Publication number: CN217927258U
Application number: CN202222201454.8U
Authority: CN
Inventors: 赵州; 赵紫光; 赵宸; 赵举川; 韦丽花; 赵东州
Original assignee: Henan Black Horse Industry Co ltd
Current assignee: Henan Black Horse Industry Co ltd
Priority date: 2022-08-20
Filing date: 2022-08-20
Publication date: 2022-11-29
Anticipated expiration: 2032-08-20

Abstract

The utility model relates to the technical field of ball valves, in particular to an electric full-bore double-eccentric half ball valve, which comprises a half ball valve; an elastic sealing mechanism is arranged in the connecting pipe positioned on the front side, the elastic sealing mechanism comprises a sealing sleeve, a connecting ring, a ring body and a mounting ring which are sequentially arranged from back to front, a plurality of guide rods are fixed on the front side wall of the connecting ring, limiting blocks are fixed at the front ends of the guide rods, and springs are sleeved on the guide rods; through the elastic sealing mechanism who sets up: under the effect of spring promptly for the rear end of seal cover supports the sprue on the tight case, makes to be connected between seal cover and the sprue more inseparable, and the situation that appears wearing and tearing under the long-term use of seal cover, under the elastic force effect of spring, the rear end of seal cover can support tight sprue all the time, thereby has improved the leakproofness of being connected between seal cover and the sprue, thereby can avoid the situation that the fluid in the valve body appears leaking, has guaranteed the leakproofness of this hemisphere valve.

Description

Electric full-bore double-eccentric half-ball valve

Technical Field

The utility model relates to a ball valve technical field specifically is an electronic full latus rectum double-eccentric half-ball valve.

Background

The electric full-bore double-eccentric half ball valve is an electric valve with nominal bore and eccentric sealing surface, and is a novel ball valve type, so that the problems of precipitation, easy scaling and blockage of media such as slurry, mixed flow liquid, dust and the like in pipeline transportation in industrial production, untight closing of the valve and the like are solved;

the utility model patent with the publication number of CN201922029112.0 discloses a double-eccentric half ball valve, which comprises a valve body, wherein the valve body comprises a first through hole, a second through hole and a third through hole, the first through hole and the second through hole are symmetrically arranged at the left end and the right end of the valve body, and the third through hole is arranged at the upper end of the valve body; the bottom of the valve body is provided with a mounting seat, the upper end of the mounting seat is rotatably provided with a hemisphere, the right side of the hemisphere is provided with a protective sealing ring, and the protective sealing ring and the valve body are of an integrally formed structure; a sealing element is arranged between the protective sealing ring and the hemispheroid; the sealing element between the hemisphere and the valve body is fixed through the connecting bolt on the valve seat, namely, the maintenance and the replacement of the sealing element can be realized from the outer side of the valve body, and the valve is convenient and fast; the double-eccentric half ball valve has simple structure, safe use process, convenient installation, material saving, long service life and convenient maintenance;

although the double-eccentric half ball valve is convenient for maintaining and replacing the sealing element, in the using process of the device, due to abrasion between the valve core and the sealing element caused by rotation of the valve core, the valve core and the sealing element are not tightly connected under long-term use, the sealing performance of the ball valve is affected, and the condition of fluid leakage in the ball valve is easily caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electronic full latus rectum double-eccentric hemisphere valve to solve the problem that proposes among the above-mentioned background art.

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

an electric full-bore double-eccentric half-ball valve comprises a half-ball valve, wherein the half-ball valve comprises a hollow valve body, two connecting pipes are fixed on the outer wall of the valve body, flange plates are fixed at the tail ends of the connecting pipes, and a valve seat is arranged at the upper part of the outer wall of the valve body; an electric actuator is arranged above the valve seat;

a valve rod sealing mechanism is arranged in the valve seat and comprises a valve rod, an output shaft of the electric actuator is coaxially connected with the valve rod in a key mode, a sealing block is fixed on the valve rod, a sealing ring is fixed on the bottom surface of the sealing block, and a plurality of gaskets are sleeved on the valve rod above the sealing ring;

the elastic sealing mechanism comprises a sealing sleeve, a connecting ring, a ring body and a mounting ring which are sequentially arranged from back to front, a plurality of guide rods are fixed on the front side wall of the connecting ring, limiting blocks are fixed at the front ends of the guide rods, and springs are sleeved on the guide rods.

As a preferred technical scheme of the present invention, a sealing hole communicated with the interior of the valve body is formed in the connecting pipe located at the front side, a through groove is formed at the front side of the sealing hole, and a mounting groove is formed in the flange plate located at the front side; the shaft hole is formed in the valve seat, the sealing groove is formed above the shaft hole, and the annular groove is formed in the bottom surface of the sealing groove.

As the utility model discloses preferred technical scheme, the inside that shaft hole and seal groove and extend to the valve body is passed to the bottom of valve rod, sealed piece is located the seal groove and supports the bottom surface of tight seal groove, the sealing ring inserts to the annular, and is a plurality of the packing ring all is located the seal groove.

As the preferred technical scheme of the utility model, the sealing sleeve is fixedly connected with the connecting ring, the ring body is fixedly connected with the mounting ring, the sealing sleeve passes through the sealing hole, and the connecting ring is in sliding connection with the through groove; the ring body is hollow structure, the front end of guide arm passes the ring body and extends to in the ring body, the stopper is located the ring body, the both ends of spring are supported ring body and go-between tightly respectively.

As the utility model discloses preferred technical scheme, the outer wall of valve body is located below department and is equipped with the fixing base, bolt fixedly connected with fixed disk is passed through to the below of fixing base, the coaxial sealing rod that is fixed with of top surface of fixed disk, the sealing rod passes the fixing base and extends to in the valve body.

As the preferable technical proposal of the utility model, the top end of the sealing rod is coaxially fixed with an insert rod, and the bottom end of the valve rod is coaxially fixed with an insert block; the valve comprises a valve body and is characterized in that a valve core is arranged inside the valve body, a first jack is formed in the position, located at the top end, of the valve core, an insertion block is in insertion fit with the first jack, a second jack is formed in the position, located at the bottom end, of the valve core, an insertion rod is in insertion fit with the second jack, a blocking block is fixed on the outer wall of the valve core, and the front side wall of the blocking block is attached to the rear end of a sealing sleeve.

As the utility model discloses preferred technical scheme, the inserted bar with the cross sectional shape of second jack all is circular, the inserted block with the cross sectional shape of first jack all is regular hexagon.

As the utility model discloses preferred technical scheme, through bolt fixedly connected with support on the outer wall of disk seat, electric actuator passes through bolt fixed connection with the support.

As the preferable technical proposal of the utility model, the two sides of the top surface of the valve seat are both tightly welded with threaded columns, and the threaded columns are all in threaded connection with nuts; the utility model discloses a valve rod, including valve rod, mounting block, clamping ring, seal groove and clamping ring, be close to top department on the valve rod and be equipped with the mounting block, the bottom surface of mounting block is fixed with the clamping ring, the valve rod passes mounting block and clamping ring and rotates with mounting block and clamping ring to be connected, the clamping ring passes the seal groove and supports the packing ring that tightly lies in the top.

As the utility model discloses preferred technical scheme, the whole shape of packing ring is the O type, the packing ring adopts the rubber material to make.

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

1. through the elastic sealing mechanism who sets up: under the effect of spring promptly for the rear end of seal cover supports the sprue on the tight case, makes the seal cover more inseparable with being connected between the sprue, and the situation that appears wearing and tearing under the long-term use of seal cover, under the spring action of spring, the rear end of seal cover can support tight sprue all the time, thereby has improved the sealing nature of being connected between seal cover and the sprue, thereby can avoid the situation that the fluid in the valve body appears leaking, has guaranteed the leakproofness of this hemisphere valve.

2. Through the valve stem sealing mechanism that sets up: the sealing block is matched with the sealing groove, and the sealing ring is matched with the annular groove, so that the connection between the valve rod and the valve seat is more tight, the connection sealing property between the valve rod and the valve seat is improved, and the problem that fluid in the valve body seeps out through the outer side of a gap between the valve rod and the valve seat is avoided.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a sectional view of the whole structure of the present invention;

FIG. 3 is a cross-sectional view of the semi-spherical valve of the present invention;

FIG. 4 is a sectional view of the valve body of the present invention;

fig. 5 is an exploded view of the valve stem sealing mechanism of the present invention;

fig. 6 is a schematic structural view of the elastic sealing mechanism of the present invention;

fig. 7 is a structural sectional view of the elastic sealing mechanism of the present invention;

fig. 8 is an enlarged schematic view of a portion a in fig. 7 according to the present invention.

In the figure:

1. a half ball valve; 11. a valve body; 12. a connecting pipe; 121. a flange plate; 122. sealing the hole; 123. a through groove; 124. mounting grooves; 13. a valve core; 131. a first jack; 132. a second jack; 14. blocking; 15. a fixed seat; 16. fixing the disc; 17. a sealing rod; 171. a rod is inserted; 18. a valve seat; 181. a threaded post; 182. a nut; 183. a shaft hole; 184. a ring groove; 185. a sealing groove; 19. a support;

2. a valve stem sealing mechanism; 21. a valve stem; 211. inserting a block; 22. a sealing block; 23. a seal ring; 24. a gasket; 25. mounting a block; 26. pressing a ring;

3. an elastic sealing mechanism; 31. a connecting ring; 32. sealing sleeves; 33. a guide bar; 34. a limiting block; 35. a spring; 36. a mounting ring; 37. a ring body;

4. an electric actuator.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The embodiment provides a technical scheme:

referring to fig. 1-4, an electric full-bore double-eccentric half ball valve includes a half ball valve 1, the half ball valve 1 includes a hollow valve body 11, two connecting pipes 12 are fixed on the outer wall of the valve body 11, and flanges 121 are fixed at the ends of the connecting pipes 12; a sealing hole 122 communicated with the interior of the valve body 11 is formed in the connecting pipe 12 positioned on the front side, a through groove 123 is formed in the front side of the sealing hole 122, and a mounting groove 124 is formed in the flange plate 121 positioned on the front side; through the sealing hole 122, the through groove 123 and the mounting groove 124, the elastic sealing mechanism 3 is convenient to mount, and therefore the sealing between the valve core 13 and the sealing sleeve 32 can be better.

Specifically, a valve seat 18 is arranged at the upper part of the outer wall of the valve body 11; a shaft hole 183 is formed in the valve seat 18, a sealing groove 185 is formed above the shaft hole 183, and a ring groove 184 is formed in the bottom surface of the sealing groove 185; the arrangement of the shaft bore 183, the seal groove 185 and the ring groove 184 facilitates installation of the valve stem seal mechanism 2,

specifically, an electric actuator 4 is arranged above the valve seat 18; through the electric actuator 4 who sets up, be convenient for drive valve rod 21 and rotate, through the rotation of valve rod 21, be convenient for drive case 13 and rotate, be convenient for adjust the position of sprue 14, conveniently adjust opening and close of hemisphere valve 1.

Specifically, a fixing seat 15 is arranged on the lower portion of the outer wall of the valve body 11, a fixing disk 16 is fixedly connected below the fixing seat 15 through a bolt, a sealing rod 17 is coaxially fixed on the top surface of the fixing disk 16, the sealing rod 17 penetrates through the fixing seat 15 and extends into the valve body 11, an insertion rod 171 is coaxially fixed at the top end of the sealing rod 17, the sealing rod 17 is coaxially and tightly welded with the insertion rod 171 and the fixing disk 16, an insertion block 211 is coaxially fixed at the bottom end of the valve rod 21, and the insertion block 211 is coaxially and tightly welded with the valve rod 21; a valve core 13 is arranged in the valve body 11, a first jack 131 is formed at the top end of the valve core 13, an insert block 211 is in inserted fit with the first jack 131, a second jack 132 is formed at the bottom end of the valve core 13, an insert rod 171 is in inserted fit with the second jack 132, a blocking block 14 is fixed on the outer wall of the valve core 13, the valve core 13 and the blocking block 14 are of an integrally formed structure, and the front side wall of the blocking block 14 is attached to the rear end of the sealing sleeve 32; the insertion rod 171 is arranged to support the valve core 13, so that the valve core 13 can rotate in the valve body 11, and the position of the valve core 13 can be adjusted to control the flow of the fluid in the valve body 11.

In this embodiment, the cross-sectional shape of inserted bar 171 and second jack 132 all is circular, and the cross-sectional shape of inserted block 211 and first jack 131 all is regular hexagon, and when electric actuator 4 drove valve rod 21 and rotates, because of inserted block 211 inserts to first jack 131 in, can drive case 13 synchronous rotation, this design is convenient for valve rod 21 and rotates case 13 simultaneously, makes things convenient for the dismouting of valve rod 21 and case 13.

In this embodiment, a bracket 19 is fixedly connected to the outer wall of the valve seat 18 through a bolt, the electric actuator 4 is fixedly connected to the bracket 19 through a bolt, and the bracket 19 provides a supporting point and a mounting point for the electric actuator 4, so that the electric actuator 4 is convenient to mount and fix.

It should be added that the valve body 11, the connecting pipe 12, the flange 121, the fixing seat 15, and the valve seat 18 in this embodiment are integrally formed, and the integrally formed structure has better structural strength, so that the service life of the hemispherical valve 1 can be prolonged, and the sealing performance of the hemispherical valve 1 can be improved.

Referring to fig. 5, the valve seat 18 is provided with the valve stem sealing mechanism 2 therein. The valve rod sealing mechanism 2 comprises a valve rod 21, an output shaft of the electric actuator 4 is coaxially connected with the valve rod 21 in a key mode, a sealing block 22 is fixed on the valve rod 21, a sealing ring 23 is fixed on the bottom surface of the sealing block 22, the valve rod 21, the sealing ring 23 and the sealing block 22 are of an integrally formed structure, and a plurality of gaskets 24 are sleeved on the valve rod 21 above the sealing ring 23; the bottom end of the valve rod 21 passes through the shaft hole 183 and the sealing groove 185 and extends into the valve body 11, the sealing block 22 is positioned in the sealing groove 185 and abuts against the bottom surface of the sealing groove 185, the sealing ring 23 is inserted into the annular groove 184, and the gaskets 24 are positioned in the sealing groove 185; on one hand, the sealing block 22 is matched with the sealing groove 185, and the sealing ring 23 is matched with the annular groove 184, so that the connection between the valve rod 21 and the valve seat 18 is tighter, and the connection sealing performance between the valve rod 21 and the valve seat 18 is improved; on the other hand, the plurality of gaskets 24 provide a further leakage-proof effect, and the connection sealing performance between the valve rod 21 and the valve seat 18 is improved.

In the present embodiment, threaded columns 181 are tightly welded at both sides of the top surface of the valve seat 18, and nuts 182 are screwed on the threaded columns 181; the valve rod 21 is provided with a mounting block 25 near the upper part, a press ring 26 is fixed on the bottom surface of the mounting block 25, the valve rod 21 penetrates through the mounting block 25 and the press ring 26 and is rotatably connected with the mounting block 25 and the press ring 26, and the press ring 26 penetrates through the sealing groove 185 and abuts against the gasket 24 located above.

In this embodiment, the gasket 24 is O-shaped, the gasket 24 is made of rubber, and the rubber gasket 24 can provide a better sealing effect in the sealing groove 185, so as to improve the connection sealing performance between the valve rod 21 and the valve seat 18.

Referring to fig. 6-8, the elastic sealing mechanism 3 is disposed in the front connecting tube 12. The elastic sealing mechanism 3 comprises a sealing sleeve 32, a connecting ring 31, a ring body 37 and a mounting ring 36 which are sequentially arranged from back to front, a plurality of guide rods 33 are fixed on the front side wall of the connecting ring 31, a limiting block 34 is fixed at the front end of each guide rod 33, the rear ends of the guide rods 33 are tightly welded with the connecting ring 31, the limiting blocks 34 are fixedly connected with the guide rods 33 through bolts, and springs 35 are sleeved on the guide rods 33; the sealing sleeve 32 is fixedly connected with the connecting ring 31, the sealing sleeve 32 is tightly welded with the connecting ring 31, the ring body 37 is fixedly connected with the mounting ring 36, the ring body 37 is tightly welded with the mounting ring 36, the sealing sleeve 32 penetrates through the sealing hole 122, and the connecting ring 31 is slidably connected with the through groove 123; the ring body 37 is of a hollow structure, the front end of the guide rod 33 penetrates through the ring body 37 and extends into the ring body 37, the limiting block 34 is positioned in the ring body 37, and two ends of the spring 35 respectively abut against the ring body 37 and the connecting ring 31; under the elastic action of the spring 35, a thrust is applied to the sealing sleeve 32 and the connecting ring 31, when the valve core 13 rotates to enable the blocking block 14 to be attached to the sealing sleeve 32, the blocking block 14 can press the sealing sleeve 32, and the spring 35 can be compressed, so that the sealing sleeve 32 is connected with the blocking block 14 more tightly.

In the present embodiment, the sealing sleeve 32 is adapted to the sealing hole 122, which can increase the sealing performance of the connection between the sealing sleeve 32 and the sealing hole 122, so as to avoid the fluid from penetrating through the gap between the sealing sleeve 32 and the sealing hole 122.

It should be noted that the electric actuator 4 in the present embodiment is conventional and will not be described herein.

Before the valve body 11 is used, a user firstly puts the valve core 13 into the valve body 11, simultaneously, the user penetrates the sealing rod 17 through the fixing seat 15 and penetrates the insert rod 171 through the second insertion hole 132, simultaneously, the user fixes the fixing disc 16 on the fixing seat 15 through bolts, then, the user penetrates the valve rod 21 through the shaft hole 183 and allows the insert block 211 to penetrate through the first insertion hole 131, simultaneously, the sealing block 22 to be inserted into the sealing groove 185, the sealing ring 23 is synchronously inserted into the annular groove 184, simultaneously, the user penetrates the valve rod 21 and arranges a plurality of gaskets 24 into the sealing groove 185, at the moment, the user penetrates the press ring 26 through the sealing groove 185, simultaneously, the threaded column 181 penetrates through the mounting block 25, the user synchronously tightens the nut 182 on the threaded column 181, and the press ring 26 tightly and presses the gaskets 24; next, a user passes the sealing sleeve 32 through the sealing hole 122, the connecting ring 31 and the ring body 37 are located in the through groove 123, and finally, the user fixes the mounting ring 36 in the mounting groove 124 through bolts;

during the specific use, the user firstly switches on the power supply of the electric actuator 4, the electric actuator 4 starts to work, the output shaft of the electric actuator 4 rotates to drive the valve rod 21 to rotate, the valve rod 21 rotates to drive the valve core 13 to rotate, when the blocking block 14 rotates, the blocking block 14 abuts against the sealing sleeve 32, under the abutting action of the blocking block 14, the sealing sleeve 32 moves towards one side, at the moment, the sealing sleeve 32 drives the connecting ring 31 to move, the guide rod 33 moves synchronously, the spring 35 is compressed simultaneously, and under the elastic action of the spring 35, the sealing sleeve 32 is more tightly connected with the blocking block 14.

The foregoing shows and describes the basic principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an electronic full latus rectum double-eccentric hemisphere valve, includes hemisphere valve (1), its characterized in that: the hemispherical valve (1) comprises a hollow valve body (11), two connecting pipes (12) are fixed on the outer wall of the valve body (11), flange plates (121) are fixed at the tail ends of the connecting pipes (12), and a valve seat (18) is arranged at the upper part of the outer wall of the valve body (11); an electric actuator (4) is arranged above the valve seat (18);

a valve rod sealing mechanism (2) is arranged in the valve seat (18), the valve rod sealing mechanism (2) comprises a valve rod (21), an output shaft of the electric actuator (4) is in coaxial key connection with the valve rod (21), a sealing block (22) is fixed on the valve rod (21), a sealing ring (23) is fixed on the bottom surface of the sealing block (22), and a plurality of gaskets (24) are sleeved on the valve rod (21) above the sealing ring (23);

be located the front side be equipped with elastic sealing mechanism (3) in connecting pipe (12), elastic sealing mechanism (3) are including seal cover (32), go-between (31), ring body (37) and collar (36) that set gradually from back to front, the preceding lateral wall of go-between (31) is fixed with a plurality of guide arms (33), the front end of guide arm (33) is fixed with stopper (34), all overlap on guide arm (33) and be equipped with spring (35).

2. The electric full-bore double-eccentric hemispherical valve as claimed in claim 1, wherein: a sealing hole (122) communicated with the interior of the valve body (11) is formed in the connecting pipe (12) positioned on the front side, a through groove (123) is formed in the front side of the sealing hole (122), and a mounting groove (124) is formed in the flange plate (121) positioned on the front side; shaft holes (183) are formed in the valve seat (18), a sealing groove (185) is formed above the shaft holes (183), and a ring groove (184) is formed in the bottom surface of the sealing groove (185).

3. The electric full-bore double-eccentric hemispherical valve as claimed in claim 2, wherein: the bottom end of the valve rod (21) penetrates through the shaft hole (183) and the sealing groove (185) and extends into the valve body (11), the sealing block (22) is located in the sealing groove (185) and abuts against the bottom surface of the sealing groove (185), the sealing ring (23) is inserted into the annular groove (184), and the gaskets (24) are located in the sealing groove (185).

4. The electric full-bore double-eccentric hemispherical valve as claimed in claim 1, wherein: the sealing sleeve (32) is fixedly connected with the connecting ring (31), the ring body (37) is fixedly connected with the mounting ring (36), the sealing sleeve (32) penetrates through the sealing hole (122), and the connecting ring (31) is in sliding connection with the through groove (123); the ring body (37) is of a hollow structure, the front end of the guide rod (33) penetrates through the ring body (37) and extends into the ring body (37), the limiting block (34) is located in the ring body (37), and two ends of the spring (35) are tightly abutted to the ring body (37) and the connecting ring (31) respectively.

5. The electric full-bore double-eccentric hemispherical valve as claimed in claim 1, wherein: the outer wall of valve body (11) is located below department and is equipped with fixing base (15), bolt fixedly connected with fixed disk (16) is passed through to the below of fixing base (15), the coaxial sealing rod (17) that is fixed with of top surface of fixed disk (16), sealing rod (17) pass fixing base (15) and extend to in valve body (11).

6. The electric full-bore double-eccentric hemispherical valve according to claim 5, wherein: an insert rod (171) is coaxially fixed at the top end of the sealing rod (17), and an insert block (211) is coaxially fixed at the bottom end of the valve rod (21); the improved valve is characterized in that a valve core (13) is arranged inside the valve body (11), a first insertion hole (131) is formed in the position, located at the top end, of the valve core (13), an insertion block (211) is in insertion fit with the first insertion hole (131), a second insertion hole (132) is formed in the position, located at the bottom end, of the valve core (13), an insertion rod (171) is in insertion fit with the second insertion hole (132), a blocking block (14) is fixed on the outer wall of the valve core (13), and the front side wall of the blocking block (14) is attached to the rear end of the sealing sleeve (32).

7. The electric full-bore double-eccentric hemispherical valve as claimed in claim 6, wherein: the cross-sectional shapes of the insert rod (171) and the second insert hole (132) are both circular, and the cross-sectional shapes of the insert block (211) and the first insert hole (131) are both regular hexagons.

8. The electric full-bore double-eccentric hemispherical valve as claimed in claim 1, wherein: the outer wall of the valve seat (18) is fixedly connected with a support (19) through a bolt, and the electric actuator (4) is fixedly connected with the support (19) through a bolt.

9. The electric full-bore double-eccentric hemispherical valve as claimed in claim 1, wherein: threaded columns (181) are tightly welded on two sides of the top surface of the valve seat (18), and nuts (182) are connected to the threaded columns (181) in a threaded mode; be equipped with installation piece (25) near top department on valve rod (21), the bottom surface of installation piece (25) is fixed with clamping ring (26), valve rod (21) pass installation piece (25) and clamping ring (26) and with installation piece (25) and clamping ring (26) rotation connection, clamping ring (26) pass seal groove (185) and support and tightly be located packing ring (24) of top.

10. The electric full-bore double-eccentric hemispherical valve as claimed in claim 1, wherein: the overall shape of the gasket (24) is O-shaped, and the gasket (24) is made of rubber.