CN111536255A

CN111536255A - High-pressure ball valve

Info

Publication number: CN111536255A
Application number: CN202010364912.2A
Authority: CN
Inventors: 董丽春; 黄延军; 邵玉刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-08-14

Abstract

The invention discloses a high-pressure ball valve which comprises a valve body, wherein a channel and a mounting hole are arranged in the valve body, the left end of the channel is an inlet, and the right end of the channel is an outlet; the valve body is provided with an upper end cover and a lower end cover at the upper end opening and the lower end opening of the mounting hole respectively; a valve rod is rotationally connected in the lower end cover, and a ball core is arranged at the upper end of the valve rod; a mandrel with the lower end fixedly connected with the transmission disc is rotatably connected in the upper end cover, a fan-shaped cutting groove is formed in the upper end cover, and the upper end of the mandrel is positioned in the valve block; the baffle plate divides the fan-shaped cutting groove into a first sealed chamber and a second sealed chamber; a valve disc is rotationally connected in the valve block; a left threaded sleeve is arranged in the valve body, a left valve seat barrel is connected in the left threaded sleeve in a sliding mode, a left connecting rod is hinged to the transmission disc, a left convex rod is fixedly mounted at the other end of the left connecting rod, a left convex shoulder is arranged on the outer side face of the left valve seat barrel, and a left spring is arranged between the left threaded sleeve and the left convex shoulder; the high-pressure ball valve has no abrasion during the opening and closing processes.

Description

High-pressure ball valve

Technical Field

The invention belongs to the technical field of pipeline valves, and particularly relates to a high-pressure ball valve.

Background

At present, ball valves are widely applied to industries such as petroleum, chemical industry, electric power, metallurgy, papermaking and the like. The traditional ball valve generally adopts soft sealing, is limited by sealing materials, has small applicable temperature range, low high temperature, high pressure and corrosion resistance and short service life, and can not meet the special working condition that a high-performance ball valve is used as a starting and closing piece when high parameters are required, so that a hard sealing ball valve is adopted. The existing hard sealing ball valve generally comprises a valve body, a valve cover, a valve ball, a valve seat and a valve rod, wherein the valve ball at the lower end of the valve rod is driven to rotate by rotating the valve rod when in use, so that a through hole on the valve ball corresponds to or is staggered with a flow passage of the valve, and the opening or closing of the ball valve is realized. Under high pressure, the sealing force between the valve seat and the valve ball is large, the valve ball generates friction with the valve seat in the rotating process, the abrasion is serious, leakage is easy to cause, the working reliability of the ball valve is reduced, and the service life of the ball valve is shortened.

Disclosure of Invention

It is an object of the present invention to provide a high pressure ball valve which is not only wear free during opening and closing.

In order to achieve the purpose, the invention provides the following technical scheme:

a high-pressure ball valve comprises a valve body, wherein a left-right through channel is arranged in the valve body, the left end of the channel is an inlet, the right end of the channel is an outlet, and the pressure of the inlet is greater than that of the outlet; the valve body is internally provided with a mounting hole along the direction vertical to the channel, an upper end cover is arranged at the opening of the upper end of the mounting hole, and a lower end cover is arranged at the opening of the lower end of the mounting hole; a valve rod is rotationally connected in the lower end cover, and the upper end of the valve rod is positioned in the mounting hole and is provided with a ball core for controlling the on-off of the channel; an installation cavity is formed between the upper end of the valve body and the upper end cover, and a transmission disc is rotatably connected to the upper end of the ball core in the installation cavity; a mandrel with the lower end fixedly connected with the transmission disc is rotatably connected in the upper end cover, a fan-shaped cutting groove is formed in the upper end cover by taking the mandrel as the center, a baffle plate extending into the fan-shaped cutting groove is arranged on the side surface of the mandrel, a valve block is fixedly mounted at the upper end of the fan-shaped cutting groove on the upper end cover, and the upper end of the mandrel is located in the valve block; the baffle plate divides the fan-shaped cutting groove into a first sealed chamber and a second sealed chamber; the valve block is rotatably connected with a valve disc, when the valve disc rotates to a first position, the first chamber is communicated with the inlet of the passage, the second chamber is communicated with the outlet of the passage, when the valve disc rotates to a second position, the first chamber is communicated with the outlet of the passage, and the second chamber is communicated with the inlet of the passage; a left threaded sleeve is arranged at the left end of the channel in the valve body, and a left valve seat cylinder is connected in the left threaded sleeve in a sliding manner along the axial direction of the channel; a left limiting groove communicated with the channel and the mounting cavity is formed in the valve body along the axial direction of the left valve seat cylinder, a left connecting rod is hinged to the transmission disc, a left convex rod penetrating through the left limiting groove and extending into the channel is fixedly mounted at the other end of the left connecting rod, a left convex shoulder is arranged on the outer side surface of the left valve seat cylinder along the radial direction, and a left spring used for forcing the left convex shoulder to be tightly pressed on the left convex rod is arranged between the left threaded sleeve and the left convex shoulder; when the valve disc is in the first position, the right end of the left valve seat cylinder leaves the ball core, and when the valve disc is in the second position, the right end of the left valve seat cylinder is pressed on the ball core.

Through the technical scheme, when the high-pressure ball valve is opened from a closed state or closed from an opened state, the valve disc is controlled to rotate to a first position, the first cavity is communicated with the inlet, the second cavity is communicated with the outlet, pressure liquid at the inlet enters the first cavity to push the baffle to rotate, the baffle drives the mandrel to rotate when rotating, the mandrel drives the transmission disc to rotate, the transmission disc drives the left convex rod to drive the left valve seat cylinder to move leftwards through the left connecting rod when rotating, so that the right end of the left valve seat cylinder leaves the ball core, then the valve rod is rotated to drive the ball core to rotate for 90 degrees to open or close the channel, then the valve disc is controlled to rotate to a second position, the first cavity is communicated with the outlet, the second cavity is communicated with the inlet, the pressure liquid at the inlet enters the second cavity to push the baffle to rotate reversely, the mandrel is driven to rotate reversely when the baffle rotates reversely, and the mandrel drives the transmission disc to rotate, the transmission disc pulls the left convex rod to move rightwards through the left connecting rod, the left spring resets, and the right end of the left valve seat cylinder is tightly pressed on the ball core, so that the opening or closing of the ball valve is completed.

In a further technical scheme, a right threaded sleeve is arranged at the right end of a channel in the valve body, and a right valve seat cylinder is connected in the right threaded sleeve in a sliding manner along the axial direction of the channel; a right limiting groove communicated with the channel and the mounting cavity is formed in the valve body along the axial direction of the right valve seat cylinder, a right connecting rod is hinged to the transmission disc, the other end of the right connecting rod is fixedly provided with a right convex rod penetrating through the right limiting groove and extending into the channel, a right convex shoulder is arranged on the outer side surface of the right valve seat cylinder along the radial direction, and a right spring used for forcing the right convex shoulder to tightly press the right convex shoulder is arranged between the right threaded sleeve and the right convex shoulder; when the valve disc is in the first position, the left end of the right valve seat cylinder leaves the ball core, and when the valve disc is in the second position, the left end of the right valve seat cylinder is pressed on the ball core.

In a further technical scheme, the upper end of the valve block is provided with an installation groove, the valve disc is rotatably connected in the installation groove, the upper end of the installation groove of the valve block is fixedly provided with a cover plate, and the central position of the valve disc is provided with a convex shaft penetrating through the cover plate; a first through hole for communicating the inlet with the bottom of the mounting groove and a second through hole for communicating the outlet with the bottom of the mounting groove are formed in the valve block, the upper end cover and the valve body; a first annular groove and a second annular groove are formed in the side face of the mandrel, and a third through hole and a fourth through hole are formed in the mandrel and are used for communicating the first annular groove with the first cavity and communicating the second annular groove with the second cavity; a fifth through hole for communicating the first annular groove with the bottom of the mounting groove and a sixth through hole for communicating the second annular groove with the bottom of the mounting groove are formed in the valve block; a first communicating groove and a second communicating groove are formed in the lower end face of the valve disc; when the valve disc is located at the first position, the first through hole is communicated with the fifth through hole through the first communicating groove, and the second through hole is communicated with the sixth through hole through the second communicating groove; when the valve disc is located at the second position, the first through hole is communicated with the sixth through hole, and the second through hole is communicated with the fifth through hole.

In a further technical scheme, a left annular groove communicated with the first through hole is formed in the inner side wall, close to the left end of the channel, of the valve body, and a right annular groove communicated with the second through hole is formed in the inner side wall, close to the right end of the channel, of the valve body; the lateral wall of left side swivel nut is equipped with the left through-hole with left annular intercommunication, the lateral wall of right swivel nut is equipped with the right through-hole with right annular intercommunication.

In a further technical scheme, a first handle is fixedly installed at the upper end of the protruding shaft.

In a further technical scheme, a second handle is fixedly installed at the lower end of the valve rod.

Advantageous effects

Compared with the prior art, the technical scheme of the invention has the following advantages:

(1) when the ball valve is opened or closed, the left valve seat cylinder and the right valve seat cylinder retract firstly, so that the ball core is not in contact friction with the left valve seat cylinder and the right valve seat, the friction force can be reduced, the abrasion is reduced, and the service life is prolonged.

(2) The invention realizes the control of the extension or retraction of the left valve seat cylinder and the right valve seat cylinder by utilizing the pressure of the medium flowing in the channel, and the first handle only controls the reversing of the through hole and does not directly connect the left valve seat cylinder and the right valve seat cylinder mechanically, so the required torque is small.

Drawings

FIG. 1 is a cross-sectional view of the present invention with the valve ball in a closed position;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken at B-B of FIG. 1;

FIG. 4 is a cross-sectional view taken at C-C of FIG. 1;

FIG. 5 is a cross-sectional view taken at D-D of FIG. 1;

FIG. 6 is a cross-sectional view of the left and right seat cylinders in a retracted state when switching from the closed to the open position in accordance with the present invention;

FIG. 7 is a cross-sectional view taken at A-A of FIG. 6;

FIG. 8 is a cross-sectional view taken at B-B of FIG. 6;

FIG. 9 is a cross-sectional view taken at C-C of FIG. 6;

FIG. 10 is a cross-sectional view taken at D-D of FIG. 6;

FIG. 11 is a cross-sectional view of the present invention in an open position;

FIG. 12 is a cross-sectional view taken at A-A of FIG. 11;

FIG. 13 is a cross-sectional view taken at B-B of FIG. 11;

FIG. 14 is a cross-sectional view taken at C-C of FIG. 11;

fig. 15 is a cross-sectional view taken at D-D in fig. 11.

Detailed Description

Referring to fig. 1-15, a high-pressure ball valve includes a valve body 12, a left-right through passage 121 is provided in the valve body 12, a left end of the passage 121 is an inlet, and a right end thereof is an outlet, and a pressure of the inlet is greater than a pressure of the outlet; a mounting hole 122 is formed in the valve body 12 along a direction perpendicular to the channel 121, an upper end cover 11 is mounted at an upper end opening of the mounting hole 122 of the valve body 12, and a lower end cover 2 is mounted at a lower end opening of the mounting hole 122; a valve rod 21 is rotatably connected in the lower end cover 2, the upper end of the valve rod 21 is positioned in the mounting hole 122 and is provided with a ball core 1 for controlling the on-off of the channel 121, and the lower end of the valve rod 21 is fixedly provided with a second handle 13; an installation cavity 123 is formed between the upper end of the valve body 12 and the upper end cover 11, and a transmission disc 4 is rotatably connected to the upper end of the ball core 1 in the installation cavity 123; a mandrel 7 with the lower end fixedly connected with the transmission disc 4 is rotatably connected in the upper end cover 11, a fan-shaped cutting groove 701 is formed in the upper end cover 11 by taking the mandrel 7 as the center, a baffle plate 75 extending into the fan-shaped cutting groove 701 is arranged on the side surface of the mandrel 7, a valve block 16 is fixedly mounted at the upper end of the fan-shaped cutting groove 701 on the upper end cover 11, and the upper end of the mandrel 7 is located in the valve block 16; the baffle 75 divides the scallop cutting 701 into a sealed first chamber 73 and a sealed second chamber 74; a valve disc 55 is rotatably connected to the valve block 16, such that when the valve disc 55 is rotated to a first position, the first chamber 73 communicates with the inlet of the passage 121, the second chamber 74 communicates with the outlet of the passage 121, and when the valve disc 55 is rotated to a second position, the first chamber 73 communicates with the outlet of the passage 121, and the second chamber 74 communicates with the inlet of the passage 121.

A left threaded sleeve 9b is arranged at the left end of the channel 121 in the valve body 12, and a left valve seat cylinder 3b is connected in the left threaded sleeve 9b in a sliding manner along the axial direction of the channel 121; a left limiting groove 12a communicated with the channel 121 and the mounting cavity 123 is formed in the valve body 12 along the axial direction of the left valve seat cylinder 3b, a left connecting rod 15b is hinged to the transmission disc 4, a left protruding rod 6b penetrating through the left limiting groove 12a and extending into the channel 121 is fixedly mounted at the other end of the left connecting rod 15b, a left convex shoulder 3b1 is arranged on the outer side surface of the left valve seat cylinder 3b along the radial direction, and a left spring 10b used for forcing the left convex shoulder 3b1 to be pressed on the left protruding rod 6b is arranged between the left threaded sleeve 9b and the left convex shoulder 3b 1; when the valve disc 55 is in the first position, the right end of the left seat cylinder 3b is away from the ball core 1, and when the valve disc 55 is in the second position, the right end of the left seat cylinder 3b is pressed against the ball core 1.

A right threaded sleeve 9a is arranged at the right end of the channel 121 in the valve body 12, and a right valve seat cylinder 3a is connected in the right threaded sleeve 9a in a sliding manner along the axial direction of the channel 121; a right limiting groove 12b communicated with the channel 121 and the mounting cavity 123 is formed in the valve body 12 along the axial direction of the right valve seat barrel 3a, a right connecting rod 15a is hinged to the transmission disc 4, a right protruding rod 6a penetrating through the right limiting groove 12b and extending into the channel 121 is fixedly mounted at the other end of the right connecting rod 15a, a right shoulder 3a1 is arranged on the outer side surface of the right valve seat barrel 3a along the radial direction, and a right spring 10a used for forcing the right shoulder 3a1 to press the right protruding rod 6a is arranged between the right threaded sleeve 9a and the right shoulder 3a 1; when the valve disc 55 is in the first position, the left end of the right seat cylinder 3a is away from the ball core 1, and when the valve disc 55 is in the second position, the left end of the right seat cylinder 3a is pressed against the ball core 1.

The upper end of the valve block 16 is provided with an installation groove 161, the valve disc 55 is rotatably connected in the installation groove 161, the upper end of the installation groove 161 of the valve block 16 is fixedly provided with a cover plate 162, the central position of the valve disc 55 is provided with a protruding shaft 5 penetrating through the cover plate 162, and the upper end of the protruding shaft 5 is fixedly provided with a first handle 14; first through

holes

16b, 11b and 12b for communicating the inlet with the bottom of the mounting groove 161 and second through

holes

16a, 11a and 12a for communicating the outlet with the bottom of the mounting groove 161 are formed in the valve block 16, the upper end cover 11 and the valve body 12; a first annular groove 71 and a second annular groove 72 are formed in the side face of the mandrel 7, and a third through hole 7a for communicating the first annular groove 71 with the first chamber 73 and a fourth through hole 7b for communicating the second annular groove 72 with the second chamber 74 are formed in the mandrel 7; a fifth through hole 16c for communicating the first ring groove 71 with the bottom of the mounting groove 161 and a sixth through hole 16d for communicating the second ring groove 72 with the bottom of the mounting groove 161 are formed in the valve block 16; a first communicating groove 5b and a second communicating groove 5a are formed in the lower end surface of the valve disc 55; when the valve disc 55 is at the first position, the first through hole communicates with the fifth through hole 16c, and the second through hole communicates with the sixth through hole 16 d; when the valve disc 55 is in the second position, the first through hole communicates with the sixth through hole 16d, and the second through hole communicates with the fifth through hole 16 c.

In addition, a left ring groove 12b1 communicated with the first through hole 12b is arranged on the inner side wall close to the left end of the channel 121 in the valve body 12, and a right ring groove 12a1 communicated with the second through hole 12a is arranged on the inner side wall close to the right end of the channel 121; the side wall of the left screw sleeve 9b is provided with a left through hole 9b1 communicated with the left ring groove 12b1, and the side wall of the right screw sleeve 9a is provided with a right through hole 9a1 communicated with the right ring groove 12a 1.

As depicted in FIG. 1, the high pressure ball valve is now closed and valve disc 55 is in the second position; when the high-pressure ball valve needs to be opened, the valve disc 55 is driven to rotate 90 degrees to a first position through the first handle 14 and the protruding shaft 5, at this time, the first chamber 73 is communicated with the inlet through the third through hole 7a, the first annular groove 71, the fifth through hole 16c, the first connecting groove 5b and the first through hole, the second chamber 74 is communicated with the outlet through the fourth through hole 7b, the second annular groove 72, the sixth through hole 16d, the second connecting groove 5a and the second through hole, pressure liquid at the inlet enters the first chamber 73 to push the baffle 75 to rotate, the baffle 75 drives the mandrel 7 to rotate when rotating, the mandrel 7 drives the transmission disc 4 to rotate, the transmission disc 4 drives the left protruding rod 6b to drive the left valve seat cylinder 3b to move leftwards to compress the left spring 10b when rotating, so that the right end of the left valve seat cylinder 3b leaves the ball core 1, meanwhile, the right protruding rod 6a is driven by the right connecting rod 15a to drive the right valve seat cylinder 3a to move rightwards to compress the right spring 10a, the left end of the right valve seat cylinder 3a leaves the ball core 1, then the valve rod 21 is rotated to drive the ball core 1 to rotate 90 degrees to open the channel 121, then the valve disc 55 is driven to rotate 90 degrees to a second position through the first handle 14 and the convex shaft 5, at the moment, the first chamber 73 is communicated with the inlet through the third through hole 7a, the first annular groove 71, the fifth through hole 16c, the second communicating groove 5a and the second through hole, the second chamber 74 is communicated with the outlet through the fourth through hole 7b, the second annular groove 72, the sixth through hole 16d, the first communicating groove 5b and the first through hole, pressure liquid at the inlet enters the second chamber 74 to push the baffle 75 to rotate reversely, the baffle 75 drives the mandrel 7 to rotate reversely, the mandrel 7 drives the transmission disc 4 to rotate reversely, the transmission disc 4 pulls the left convex rod 6b to move rightwards through the left connecting rod 15b, the left spring 10b is reset, the right end of the left valve seat cylinder 3b is tightly pressed on the ball core 1, meanwhile, the right convex rod 6a is pulled by the right connecting rod 15a to move leftwards, the right spring 10a is reset, and the left end of the right valve seat cylinder 3a is pressed on the ball core 1, so that the opening of the ball valve is completed.

As depicted in FIG. 11, with the high pressure ball valve in the open position, valve disc 55 is in the second position; when the high-pressure ball valve needs to be closed, the valve disc 55 is driven to rotate 90 degrees to a first position through the first handle 14 and the protruding shaft 5, at this time, the first chamber 73 is communicated with the inlet through the third through hole 7a, the first annular groove 71, the fifth through hole 16c, the first connecting groove 5b and the first through hole, the second chamber 74 is communicated with the outlet through the fourth through hole 7b, the second annular groove 72, the sixth through hole 16d, the second connecting groove 5a and the second through hole, pressure liquid at the inlet enters the first chamber 73 to push the baffle 75 to rotate, the baffle 75 drives the mandrel 7 to rotate when rotating, the mandrel 7 drives the transmission disc 4 to rotate, the transmission disc 4 drives the left protruding rod 6b to drive the left valve seat cylinder 3b to move leftwards to compress the left spring 10b when rotating, so that the right end of the left valve seat cylinder 3b leaves the ball core 1, meanwhile, the right protruding rod 6a is driven by the right connecting rod 15a to drive the right valve seat cylinder 3a to move rightwards to compress the right spring 10a, the left end of the right valve seat cylinder 3a leaves the ball core 1, then the valve rod 21 is rotated to drive the ball core 1 to rotate 90 degrees to close the channel 121, then the valve disc 55 is driven to rotate 90 degrees to a second position through the first handle 14 and the convex shaft 5, at the moment, the first chamber 73 is communicated with the inlet through the third through hole 7a, the first annular groove 71, the fifth through hole 16c, the second communicating groove 5a and the second through hole, the second chamber 74 is communicated with the outlet through the fourth through hole 7b, the second annular groove 72, the sixth through hole 16d, the first communicating groove 5b and the first through hole, pressure liquid at the inlet enters the second chamber 74 to push the baffle 75 to rotate reversely, the baffle 75 drives the mandrel 7 to rotate reversely, the mandrel 7 drives the transmission disc 4 to rotate reversely, the transmission disc 4 pulls the left convex rod 6b to move rightwards through the left connecting rod 15b when rotating, the left spring 10b is reset, the right end of the left valve seat cylinder 3b is tightly pressed on the ball core 1, meanwhile, the right convex rod 6a is pulled by the right connecting rod 15a to move leftwards, the right spring 10a is reset, and the left end of the right valve seat cylinder 3a is tightly pressed on the ball core 1, so that the closing of the ball valve is completed.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A high-pressure ball valve comprises a valve body, wherein a left-right through channel is arranged in the valve body, the left end of the channel is an inlet, the right end of the channel is an outlet, and the pressure of the inlet is greater than that of the outlet; the valve body is internally provided with a mounting hole along the direction vertical to the channel, an upper end cover is arranged at the opening of the upper end of the mounting hole, and a lower end cover is arranged at the opening of the lower end of the mounting hole; a valve rod is rotationally connected in the lower end cover, and the upper end of the valve rod is positioned in the mounting hole and is provided with a ball core for controlling the on-off of the channel; the ball valve is characterized in that an installation cavity is formed between the upper end of the valve body and the upper end cover, and a transmission disc is rotatably connected to the upper end of the ball core in the installation cavity; a mandrel with the lower end fixedly connected with the transmission disc is rotatably connected in the upper end cover, a fan-shaped cutting groove is formed in the upper end cover by taking the mandrel as the center, a baffle plate extending into the fan-shaped cutting groove is arranged on the side surface of the mandrel, a valve block is fixedly mounted at the upper end of the fan-shaped cutting groove on the upper end cover, and the upper end of the mandrel is located in the valve block; the baffle plate divides the fan-shaped cutting groove into a first sealed chamber and a second sealed chamber; the valve block is rotatably connected with a valve disc, when the valve disc rotates to a first position, the first chamber is communicated with the inlet of the passage, the second chamber is communicated with the outlet of the passage, when the valve disc rotates to a second position, the first chamber is communicated with the outlet of the passage, and the second chamber is communicated with the inlet of the passage; a left threaded sleeve is arranged at the left end of the channel in the valve body, and a left valve seat cylinder is connected in the left threaded sleeve in a sliding manner along the axial direction of the channel; a left limiting groove communicated with the channel and the mounting cavity is formed in the valve body along the axial direction of the left valve seat cylinder, a left connecting rod is hinged to the transmission disc, a left convex rod penetrating through the left limiting groove and extending into the channel is fixedly mounted at the other end of the left connecting rod, a left convex shoulder is arranged on the outer side surface of the left valve seat cylinder along the radial direction, and a left spring used for forcing the left convex shoulder to be tightly pressed on the left convex rod is arranged between the left threaded sleeve and the left convex shoulder; when the valve disc is in the first position, the right end of the left valve seat cylinder leaves the ball core, and when the valve disc is in the second position, the right end of the left valve seat cylinder is pressed on the ball core.

2. The high-pressure ball valve according to claim 1, wherein a right threaded sleeve is arranged at the right end of the channel in the valve body, and a right valve seat cylinder is connected in the right threaded sleeve in a sliding manner along the axial direction of the channel; a right limiting groove communicated with the channel and the mounting cavity is formed in the valve body along the axial direction of the right valve seat cylinder, a right connecting rod is hinged to the transmission disc, the other end of the right connecting rod is fixedly provided with a right convex rod penetrating through the right limiting groove and extending into the channel, a right convex shoulder is arranged on the outer side surface of the right valve seat cylinder along the radial direction, and a right spring used for forcing the right convex shoulder to tightly press the right convex shoulder is arranged between the right threaded sleeve and the right convex shoulder; when the valve disc is in the first position, the left end of the right valve seat cylinder leaves the ball core, and when the valve disc is in the second position, the left end of the right valve seat cylinder is pressed on the ball core.

3. The high-pressure ball valve according to claim 2, wherein the upper end of the valve block is provided with a mounting groove, the valve disc is rotatably connected in the mounting groove, the valve block is fixedly provided with a cover plate at the upper end of the mounting groove, and a protruding shaft penetrating through the cover plate is arranged at the center of the valve disc; a first through hole for communicating the inlet with the bottom of the mounting groove and a second through hole for communicating the outlet with the bottom of the mounting groove are formed in the valve block, the upper end cover and the valve body; a first annular groove and a second annular groove are formed in the side face of the mandrel, and a third through hole and a fourth through hole are formed in the mandrel and are used for communicating the first annular groove with the first cavity and communicating the second annular groove with the second cavity; a fifth through hole for communicating the first annular groove with the bottom of the mounting groove and a sixth through hole for communicating the second annular groove with the bottom of the mounting groove are formed in the valve block; a first communicating groove and a second communicating groove are formed in the lower end face of the valve disc; when the valve disc is at the first position, the first through hole is communicated with the fifth through hole, and the second through hole is communicated with the sixth through hole; when the valve disc is located at the second position, the first through hole is communicated with the sixth through hole, and the second through hole is communicated with the fifth through hole.

4. The high-pressure ball valve according to claim 3, wherein a left ring groove communicating with the first through hole is provided on an inner side wall of the valve body near the left end of the passage, and a right ring groove communicating with the second through hole is provided on an inner side wall of the valve body near the right end of the passage; the lateral wall of left side swivel nut is equipped with the left through-hole with left annular intercommunication, the lateral wall of right swivel nut is equipped with the right through-hole with right annular intercommunication.

5. The high pressure ball valve of claim 4, wherein a first handle is fixedly mounted to an upper end of said protruding shaft.

6. The high pressure ball valve of claim 5, wherein a second handle is fixedly mounted to a lower end of the valve stem.