High-temperature-resistant ball valve for conveying high-temperature steam

Abstract

The invention relates to the technical field of ball valves, in particular to a high-temperature-resistant ball valve for high-temperature steam conveying, which comprises a valve body and a valve ball on the inner side of the valve body, two annular grooves are formed in the two ends of the valve body, a plurality of valve seats which are coaxially arranged are movably arranged on the inner sides of the two annular grooves, a sealing ring is arranged on one side of each valve seat, and a sealing ring is arranged on the other side of each valve seat. The inner sides of the two annular grooves are each provided with a transposition abutting mechanism, and the transposition abutting mechanisms are used for alternately applying pressure to the multiple valve seats. According to the ball valve, the valve seats and the sealing rings which are coaxially arranged are arranged, pressure is applied to the valve seats in turn through the transposition abutting mechanism, so that pressure is applied to the sealing rings in turn, the different sealing rings can be adjusted to be pressed on the outer side of the valve ball when the ball valve is in a working state, and therefore the different sealing rings are adjusted to conduct sealing; the maintenance and replacement frequency of the ball valve is greatly reduced, the service life of the ball valve is prolonged, and the maintenance and replacement period of the ball valve is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of ball valves, and particularly to a high-temperature resistant ball valve for high-temperature steam transportation. Background Art

[0002] Ball valves are widely used in industries such as petroleum refining, long-distance pipelines, chemical engineering, paper making, pharmaceuticals, water conservancy, electric power, municipal engineering, and steel. They play a crucial role in the national economy. In high-temperature steam transportation pipelines, the sealing rings of the ball valves in the pipelines are continuously heated by high-temperature steam for a long time. As a result, the volume of the sealing rings is always in an expanded state. When the valve balls are rotated frequently, the sealing rings are prone to accelerated wear under the action of friction.

[0003] After retrieval, a Chinese patent with the publication number: CN213808980U discloses a high-temperature resistant ball valve, which includes a valve body. A first flange is provided on the left surface of the valve body, a second flange is fixedly connected to the right side of the valve body, a mounting post is fixedly connected to the upper surface of the valve body, a sealing sleeve is fixedly connected to the upper surface of the mounting post, a valve stem is movably connected inside the valve body, a sleeve is fixedly connected to the upper surface of the valve stem, a rotating rod is provided inside the sleeve, a valve cavity is provided inside the valve body, a valve ball is fixedly connected to the outer surface of the valve stem and located inside the valve cavity, a ball cavity is opened inside the valve ball, and a protective pad is fixedly connected to the inner wall of the ball cavity.

[0004] Based on the above retrieval and combined with practical problems, it is found that although this high-temperature ball valve can reduce the wear of the valve ball, the sealing ring will still be accelerated in wear due to high temperature. The service life of the sealing ring in a high-temperature working state for a long time is greatly reduced. Therefore, the maintenance and replacement cycle of the ball valve is also greatly shortened, and the ball valve needs to be repaired and replaced more frequently. Each time the ball valve is repaired and replaced, the transportation pipeline needs to be shut down, thus affecting the operation stability of the transportation pipeline. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-temperature resistant ball valve for high-temperature steam transportation to solve the problems raised in the above background art.

[0006] The technical solution of the present invention is: a high-temperature resistant ball valve for high-temperature steam transmission, including a valve body and a valve ball inside it. Two annular grooves are opened at both ends of the valve body. A plurality of coaxially arranged valve seats are movably arranged inside the two annular grooves. A sealing ring is arranged on one side of each valve seat. A position-changing and pressing mechanism is arranged inside the two annular grooves. The position-changing and pressing mechanism is used to alternately apply pressure to a plurality of valve seats; the position-changing and pressing mechanism includes a plurality of position-changing screws rotatably inserted into the annular grooves. A slider is threadedly connected to the outside of each position-changing screw. A sleeve is fixed to one side of each slider. One end of each sleeve is elastically connected to a sliding rod through an extrusion mechanism. And a pressure regulating mechanism is arranged between the plurality of sleeves; the extrusion mechanism includes a first sliding plate fixed to one end of the sliding rod and slidably connected to the inside of the sleeve. The first sliding plate is elastically connected to the inside of the sleeve through a pressure regulating spring.

[0007] Preferably, the extrusion mechanism includes a limiting ring fixed to the inside of the sleeve and a second sliding plate fixed to one end of the pressure regulating spring. The second sliding plate is slidably connected to the inside of the sleeve, and one end of the second sliding plate is in contact with one end of the limiting ring.

[0008] Preferably, the pressure regulating mechanism includes a fixing ring fixed to the outside of the valve body. An annular cavity is opened inside the fixing ring. And an adjusting cylinder communicated with the annular cavity is arranged on the outside of the fixing ring. One end of the adjusting cylinder is threadedly connected with an adjusting screw. One end of the adjusting screw is rotatably connected with an adjusting sliding plate. The adjusting sliding plate is slidably matched with the inside of the adjusting cylinder. One end of the inside of the plurality of sleeves is communicated with the annular cavity through a connecting pipe.

[0009] Preferably, one end of each position-changing screw is fixed with a gear located outside the valve body. One end of the outside of the valve body is rotatably connected with a rotating ring. A plurality of teeth are uniformly fixed to one end of the rotating ring. And the rotating ring is engaged with the plurality of gears through the plurality of teeth.

[0010] Preferably, a guiding groove is opened at the position of one end of the valve body corresponding to each position-changing screw. A guiding slider slidably matched with the inside of the guiding groove is fixed to the outside of each slider.

[0011] Preferably, a chamfer is arranged at the edge position on one side of each valve seat.

[0012] Preferably, a roller is rotatably connected to one end of each sliding rod.

[0013] Preferably, a spherical surface adapted to the outside of the valve ball is arranged on one side of the plurality of sealing rings.

[0014] Preferably, locking mechanisms for locking the rotating ring are provided at both ends of the valve body. The locking mechanisms include fixing plates fixed to one side of the valve body. A locking screw is threadedly connected to the middle position of the fixing plate. One end of the locking screw is rotatably connected to a pressing plate. A plurality of locking teeth are provided on one side of the pressing plate, and the plurality of locking teeth are respectively engaged with a plurality of teeth. Two guide rods are fixed to one side of the pressing plate, and both of the two guide rods are slidably inserted into the interior of the fixing plate.

[0015] Preferably, the upper and lower ends of the valve ball are respectively rotatably connected to the valve body through an upper rotating shaft and a lower rotating shaft. An anti-misoperation mechanism is provided between the upper rotating shaft and the valve body. The anti-misoperation mechanism includes a fixed cylinder fixed to the outer side of the valve body, a spline sleeve shaft fixed to the outer side of the upper rotating shaft, and a spline sleeve rotatably sleeved on the outer side of the upper rotating shaft. A lever is fixed to the outer side of the spline sleeve, and the lower side of the lever is elastically connected to the upper end of the fixed cylinder through a return spring.

[0016] The present invention provides a high-temperature resistant ball valve for high-temperature steam transportation through improvement. Compared with the prior art, it has the following improvements and advantages: Firstly: By arranging a plurality of coaxially arranged valve seats and sealing rings, and then through a transposition pressing mechanism, pressure is applied to the plurality of valve seats in rotation, so as to apply pressure to the plurality of sealing rings in rotation. Therefore, when the ball valve is in a working state, different sealing rings can be adjusted to be pressed tightly outside the valve ball, so as to adjust different sealing rings for sealing, greatly reducing the maintenance and replacement times of the ball valve, extending the service life of the ball valve, extending the maintenance and replacement cycle of the ball valve, and reducing the maintenance and replacement times of the ball valve can reduce the pipeline shutdown time, thus ensuring the long-term stable operation of the pipeline.

[0017] Secondly: Through the pressure regulating mechanism of the present invention, the pressure of each pressing mechanism can be adjusted, so as to adjust the pressure of the plurality of rollers in the transposition pressing mechanism on the valve seat, and further adjust the pressure between the sealing ring and the valve ball. Before the valve ball needs to be rotated to open the valve, the pressure between the sealing ring and the valve ball is reduced through the pressure regulating mechanism, so as to reduce the friction force between the two. Therefore, when the valve ball is frequently rotated to open and close, the wear of the sealing ring can be effectively reduced, thus extending the service life of the sealing ring, and further extending the maintenance and replacement cycle of the ball valve and reducing the maintenance and replacement times of the ball valve.

[0018] Thirdly: Through the anti-misoperation mechanism of the present invention, only when the lever is pressed down and rotated can the valve ball be driven to rotate. When the lever is not pressed down and is collided or misoperated, it will not transmit the rotational torque to the valve ball. Therefore, misoperation or collision is avoided from causing the valve ball to rotate, thus avoiding unnecessary wear of the sealing ring and further extending the maintenance and replacement cycle of the ball valve. Description of the Drawings

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 Schematic diagram of the three-dimensional structure of the present invention; Figure 2 Schematic diagram of the first sectional structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged structure diagram of part A in; Figure 4 Schematic diagram of the internal structure of the sleeve in the present invention; Figure 5 Schematic diagram of the second sectional structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged structure diagram of part B in; Figure 7 Schematic diagram of the structure of the ball valve in the closed state of the present invention; Figure 8 For the present invention Figure 1 Enlarged structure diagram of part C in.

[0021] Reference numerals: 1. Valve body; 2. Valve ball; 3. Annular groove; 4. Valve seat; 5. Sealing ring; 6. Chamfer; 7. Upper rotating shaft; 8. Lower rotating shaft; 101. Transposition screw; 102. Slide block; 103. Sleeve; 104. Slide rod; 105. Roller; 106. First slide plate; 107. Second slide plate; 108. Pressure regulating spring; 109. Guide slide block; 110. Guide groove; 111. Gear; 112. Tooth; 113. Rotating ring; 114. Limiting ring; 201. Adjusting cylinder; 202. Adjusting screw; 203. Adjusting slide plate; 204. Fixed ring; 205. Connecting pipe; 206. Annular cavity; 301. Fixed plate; 302. Locking screw; 303. Pressing plate; 304. Locking tooth; 305. Guide rod; 401. Spline sleeve shaft; 402. Spline sleeve; 403. Pushing rod; 404. Return spring; 405. Fixed cylinder. Specific embodiments

[0022] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0023] The present invention provides a high-temperature resistant ball valve for high-temperature steam transmission by improvement. The technical solution of the present invention is as follows: As Figures 1 to 8 shown, the embodiment of the present invention provides a high-temperature resistant ball valve for high-temperature steam transmission, including a valve body 1 and a valve ball 2 inside it. Two annular grooves 3 are opened at both ends of the valve body 1. A plurality of coaxially arranged valve seats 4 are movably arranged inside the two annular grooves 3. A sealing ring 5 is arranged on one side of each valve seat 4. A spherical surface adapted to the outer side of the valve ball 2 is arranged on one side of the plurality of sealing rings 5. A position-changing and pressing mechanism is arranged inside the two annular grooves 3. The position-changing and pressing mechanism is used to alternately apply pressure to the plurality of valve seats 4; the position-changing and pressing mechanism includes a plurality of position-changing screw rods 101 rotatably inserted into the annular groove 3. A slider 102 is threadedly connected to the outer side of each position-changing screw rod 101. A sleeve 103 is fixed to one side of each slider 102. One end of each sleeve 103 is elastically connected to a sliding rod 104 through an extrusion mechanism. One end of each sliding rod 104 is rotatably connected to a roller 105, and a pressure adjusting mechanism is arranged between the plurality of sleeves 103; the extrusion mechanism includes a first sliding plate 106 fixed to one end of the sliding rod 104 and slidably connected to the inside of the sleeve 103. The first sliding plate 106 is elastically connected to the inside of the sleeve 103 through a pressure regulating spring 108. The extrusion mechanism includes a limiting ring 114 fixed to the inside of the sleeve 103 and a second sliding plate 107 fixed to one end of the pressure regulating spring 108. The second sliding plate 107 is slidably connected to the inside of the sleeve 103, and one end of the second sliding plate 107 is in contact with one end of the limiting ring 114.

[0024] Furthermore, the pressure adjusting mechanism includes a fixing ring 204 fixed to the outer side of the valve body 1. An annular cavity 206 is opened inside the fixing ring 204. An adjusting cylinder 201 communicated with the annular cavity 206 is arranged on the outer side of the fixing ring 204. An adjusting screw rod 202 is threadedly connected to one end of the adjusting cylinder 201. One end of the adjusting screw rod 202 is rotatably connected to an adjusting sliding plate 203. The adjusting sliding plate 203 is slidably adapted to the inside of the adjusting cylinder 201. One end of the inner sides of the plurality of sleeves 103 is communicated with the annular cavity 206 through a connecting pipe 205; Through the pressure regulating mechanism, the pressure of each extrusion mechanism can be adjusted, thereby adjusting the pressure of the multiple rollers 105 in the transposition tightening mechanism on the valve seat 4, and further adjusting the pressure between the sealing ring 5 and the valve ball 2. Before the valve ball 2 needs to be rotated to open the valve, the pressure between the sealing ring 5 and the valve ball 2 is reduced through the pressure regulating mechanism, thereby reducing the friction force between the two. Therefore, when the valve ball 2 is frequently rotated to open and close, the wear of the sealing ring 5 can be effectively reduced, thereby extending the service life of the sealing ring 5, further extending the maintenance and replacement cycle of the ball valve, and reducing the number of maintenance and replacement times of the ball valve.

[0025] Further, one end of each transposition screw 101 is fixedly provided with a gear 111 located outside the valve body 1. One end of the valve body 1 is rotatably connected with a rotating ring 113. One end of the rotating ring 113 is evenly fixed with a plurality of teeth 112, and the rotating ring 113 is engaged with the plurality of gears 111 through the plurality of teeth 112; Through the rotating ring 113 and the plurality of teeth 112 at one end thereof, the plurality of transposition screws 101 can be driven to rotate synchronously, so that the plurality of rollers 105 can be driven to roll synchronously along one side of the valve seat 4, thereby uniformly applying a thrust force to one side of the valve seat 4, ensuring that the sealing ring 5 is fully attached to the surface of the valve ball 2, and improving the sealing effect.

[0026] Further, a guiding groove 110 is provided at the position of the valve body 1 corresponding to each transposition screw 101. A guiding slider 109 that is slidably adapted to the inner side of the guiding groove 110 is fixedly provided on the outer side of each slider 102; Through the sliding adaptation of the guiding slider 109 and the guiding groove 110, the slider 102 can be kept moving in a straight line, so that the sleeve 103 and the sliding rod 104 are perpendicular to one side of the valve seat 4, thereby ensuring a stable thrust force applied to the valve seat 4.

[0027] Further, a chamfer 6 is provided at the edge position on one side of each valve seat 4.

[0028] When the roller 105 moves from one valve seat 4 to an adjacent valve seat 4, the chamfer 6 facilitates the smooth transition of the roller 105 and prevents the roller 105 from hitting the side of the valve seat 4.

[0029] Further, locking mechanisms for locking the rotating ring 113 are provided at both ends of the valve body 1. The locking mechanism includes a fixing plate 301 (as Figure 8 shown) fixed on one side of the valve body 1. A locking screw 302 is threadedly connected to the middle position of the fixing plate 301. One end of the locking screw 302 is rotatably connected to a pressing plate 303. A plurality of locking teeth 304 are provided on one side of the pressing plate 303. The plurality of locking teeth 304 are respectively engaged with the plurality of teeth 112. Two guide rods 305 are fixed on one side of the pressing plate 303. Both of the two guide rods 305 are slidably inserted into the inside of the fixing plate 301; Rotate the locking screw 302 of the rotation locking mechanism. The locking screw 302 drives the pressing plate 303 to move through the thread, so that a plurality of locking teeth 304 on one side of the pressing plate 303 are adapted to the teeth 112 at one end of the rotating ring 113, thereby locking the rotating ring 113 and preventing it from rotating.

[0030] Further, the upper and lower ends of the valve ball 2 are respectively rotatably connected to the valve body 1 through the upper rotating shaft 7 and the lower rotating shaft 8. An anti-misoperation mechanism is arranged between the upper rotating shaft 7 and the valve body 1. The anti-misoperation mechanism includes a fixed cylinder 405 (as Figure 6 shown) fixed on the outer side of the valve body 1, a spline sleeve shaft 401 fixed on the outer side of the upper rotating shaft 7, and a spline sleeve 402 movably sleeved on the outer side of the upper rotating shaft 7. A lever 403 is fixed on the outer side of the spline sleeve 402, and the lower side of the lever 403 is elastically connected to the upper end of the fixed cylinder 405 through a return spring 404; Through the anti-misoperation mechanism, only when the lever 403 is pressed down and rotated can the valve ball 2 be driven to rotate. When the lever 403 is not pressed down and is collided or misoperated, it will not transfer the rotational torque to the valve ball 2. Therefore, the rotation of the valve ball 2 caused by misoperation or collision is avoided, thereby avoiding unnecessary wear of the sealing ring 5 and further extending the maintenance and replacement cycle of the ball valve.

[0031] Working principle: When the ball valve is initially installed and used, rotate the rotating ring 113. The rotating ring 113 drives the rotation of multiple teeth 112 on one side of it, and through the meshing of the multiple teeth 112 with multiple gears 111, it drives the synchronous rotation of the multiple gears 111. The multiple gears 111 respectively drive the synchronous rotation of multiple displacement screws 101 of the displacement and clamping mechanism. The multiple displacement screws 101 drive the synchronous movement of multiple sliders 102 through threads respectively, so that the multiple sliders 102 move synchronously towards the axis direction of the valve body 1. The multiple sliders 102 drive the multiple sleeves 103 and the slide rods 104 to move synchronously towards the axis line of the valve body 1, thereby driving the multiple rollers 105 to roll to one side of the smallest valve seat 4. One end of the second slide plate 107 of the extrusion mechanism abuts against one end of the limit ring 114, and the pressure regulating spring 108 is in a compressed state. Therefore, the pressure regulating spring 108 can transfer the elastic force to the roller 105 through the first slide plate 106 and the slide rod 104, so that the roller 105 applies pressure to one side of the smallest valve seat 4. This valve seat 4 transfers the pressure to the sealing ring 5 on the other side of it, so that the smallest sealing ring 5 is pressed tightly on the outside of the valve ball 2. At this time, the other two sealing rings 5 only contact the outside of the valve ball 2 and are not pressed tightly against the outside of the valve ball 2. Therefore, at this time, only the smallest sealing ring 5 seals the gap between the valve ball 2 and the valve body 1. As the use time progresses, the high-temperature steam continuously heats the sealing ring 5, and the volume of the sealing ring 5 expands. When the valve ball 2 is rotated after the sealing ring 5 expands, it will cause the friction force between the sealing ring 5 and the valve ball 2 to increase, so that the shearing force on the surface of the sealing ring 5 increases when the valve ball 2 rotates. After frequently rotating the valve ball 2, it is easy to cause the sealing ring 5 to deform and reduce the sealing performance; When the sealing performance of the sealing ring 5 deteriorates, only need to rotate the rotating ring 113. Through the above principle, drive the synchronous rotation of multiple displacement screws 101 of the displacement and clamping mechanism, thereby driving each slide rod 104 to move outwards synchronously, so as to drive the roller 105 at one end of each slide rod 104 to roll from one side of the smallest valve seat 4 to one side of an outer ring valve seat 4, thereby canceling the thrust on the smallest valve seat 4 and transferring the thrust to an outer ring valve seat 4, so that an outer ring sealing ring 5 is pressed tightly on the outside of the valve ball 2, so that an outer ring sealing ring 5 seals the gap between the valve ball 2 and the valve body 1. When the sealing performance of an outer ring sealing ring 5 deteriorates, apply thrust to an outermost ring valve seat 4 through the above principle again, so that an outermost ring sealing ring 5 is pressed tightly on the outside of the valve ball 2. Therefore, different sealing rings 5 can be adjusted for sealing when the ball valve is in a working state, greatly reducing the maintenance and replacement times of the ball valve, extending the service life of the ball valve, extending the maintenance and replacement cycle of the ball valve, and reducing the maintenance and replacement times of the ball valve can reduce the pipeline shutdown time, thus ensuring the long-term stable operation of the pipeline; Hydraulic oil is filled at the positions of the inner sides of multiple sleeves 103 away from the sliding rod 104, and the adjusting cylinder 201 and the annular cavity 206 are both filled with hydraulic oil. To improve the sealing effect, rotate the adjusting screw 202 of the pressure adjusting mechanism. The rotation of the adjusting screw 202 drives the adjusting slide plate 203 to move downward through the thread, pressing the hydraulic oil at the lower end of the inner side of the adjusting cylinder 201 into the inner side of the annular cavity 206, and then respectively pressing it into the inner ends of multiple sleeves 103 through multiple connecting pipes 205. After the hydraulic oil is pressed into the inner ends of the sleeves 103, the pressure on the second slide plate 107 is increased, causing the second slide plate 107 to move towards the first slide plate 106 position, thereby compressing the pressure regulating spring 108 more, increasing the thrust of the pressure regulating spring 108 on the first slide plate 106 and the sliding rod 104, increasing the pressure of the roller 105 on the valve seat 4, and thus increasing the pressure of the sealing ring 5 on the outer side of the valve ball 2, thereby improving the sealing performance; to reduce the wear and deformation of the sealing ring 5, before rotating the valve ball 2 each time, first rotate the adjusting screw 202 of the pressure adjusting mechanism. The adjusting screw 202 drives the adjusting slide plate 203 to slide inside the adjusting cylinder 201 through the thread, causing the adjusting slide plate 203 to slide towards the upper end of the adjusting cylinder 201, thereby increasing the space at the lower end of the inner side of the adjusting cylinder 201, and thus forming a negative pressure state in the space at the lower end of the inner side of the adjusting cylinder 201. At this time, the hydraulic oil at the inner end of each sleeve 103 can be sucked into the inner side of the annular cavity 206 through the connecting pipe 205, and then sucked into the lower end of the inner side of the adjusting cylinder 201. At this time, the hydraulic oil at the inner end of the sleeve 103 decreases, the pressure of the hydraulic oil on the second slide plate 107 decreases, and the second slide plate 107 will move towards the position of the limiting ring 114, thereby reducing the compression of the pressure regulating spring 108, reducing the thrust exerted by the pressure regulating spring 108 on the first slide plate 106 and the sliding rod 104, and reducing the pressure exerted by the roller 105 on the valve seat 4. When rotating the valve ball 2 at this time, the friction between the sealing ring 5 and the outer side of the valve ball 2 can be greatly reduced, thereby reducing the wear and deformation of the sealing ring 5, extending the service life of the sealing ring 5, further extending the maintenance and replacement cycle of the ball valve, and reducing the number of maintenance and replacement times of the ball valve; To prevent the valve ball 2 from being accidentally rotated, which may cause unnecessary wear between the valve ball 2 and the sealing ring 5, when the valve ball 2 needs to be rotated, the lever 403 of the anti-misoperation mechanism is pressed. The lever 403 drives the spline sleeve 402 to move downward and compresses the return spring 404, so that the spline sleeve 402 is sleeved outside the spline shaft 401. Thus, the rotational torque of the spline sleeve 402 can be transmitted to the spline shaft 401, and then transmitted to the upper rotating shaft 7. When the lever 403 is rotated, the rotational torque can be transmitted to the valve ball 2 through the spline sleeve 402, the spline shaft 401 and the upper rotating shaft 7, thereby driving the valve ball 2 to rotate and completing the opening and closing operation of the ball valve. After the lever 403 is released, the spline sleeve 402 and the lever 403 will be pushed up under the elastic force of the return spring 404, so that the spline sleeve 402 and the spline shaft 401 are separated. At this time, when the lever 403 is rotated, the rotational torque will not be transmitted to the upper rotating shaft 7, thus avoiding accidental rotation of the valve ball 2, further reducing the wear of the sealing ring 5, and further extending the maintenance and replacement cycle of the ball valve.

[0032] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high temperature resistant ball valve for high temperature steam transportation, comprising a valve body (1) and a valve ball (2) inside the valve body, characterized in that: Two annular grooves (3) are provided at both ends of the valve body (1), a plurality of coaxially arranged valve seats (4) are movably provided inside the two annular grooves (3), a sealing ring (5) is provided on one side of each valve seat (4), and a shifting and tightening mechanism is provided inside the two annular grooves (3), the shifting and tightening mechanism being used to apply pressure to the plurality of valve seats (4) in rotation; The transposition and tightening mechanism comprises a plurality of transposition screws (101) rotatably inserted into the annular groove (3), the outer side of each transposition screw (101) being threadedly connected to a slider (102), one side of each slider (102) being fixed with a sleeve (103), one end of each sleeve (103) being elastically connected to a slide rod (104) via an extrusion mechanism, and a pressure regulating mechanism being arranged between the plurality of sleeves (103); The extrusion mechanism comprises a first slide plate (106) fixed to one end of a slide rod (104) and slidably connected to the inner side of a sleeve (103); the first slide plate (106) is elastically connected to the inner side of the sleeve (103) via a pressure regulating spring (108).

2. The high temperature resistant ball valve for high temperature steam transportation according to claim 1, characterized in that: The extrusion mechanism comprises a limiting ring (114) fixed to the inner side of the sleeve (103) and a second slide plate (107) fixed to one end of the pressure regulating spring (108); the second slide plate (107) is slidably connected to the inner side of the sleeve (103), and one end of the second slide plate (107) is in contact with one end of the limiting ring (114).

3. The high temperature resistant ball valve for high temperature steam transportation according to claim 1, characterized in that: The pressure regulating mechanism comprises a fixing ring (204) fixed to the outside of the valve body (1), an annular cavity (206) is provided inside the fixing ring (204), and an adjusting cylinder (201) connected to the annular cavity (206) is provided outside the fixing ring (204), one end of the adjusting cylinder (201) is threadedly connected to an adjusting screw (202), one end of the adjusting screw (202) is rotatably connected to an adjusting slide plate (203), the adjusting slide plate (203) is slidably fitted with the inner side of the adjusting cylinder (201), and the inner ends of the plurality of sleeves (103) are all connected to the annular cavity (206) via a connecting pipe (205).

4. The high temperature resistant ball valve for high temperature steam transportation according to claim 1, characterized in that: A gear (111) located outside the valve body (1) is fixed to one end of each of the transposition screws (101); one end of the outer side of the valve body (1) is rotatably connected to a rotating ring (113); a plurality of teeth (112) are evenly fixed to one end of the rotating ring (113); and the rotating ring (113) meshes with the plurality of gears (111) via the plurality of teeth (112).

5. The high temperature resistant ball valve for high temperature steam transportation according to claim 1, characterized in that: A guide groove (110) is provided at one end of the valve body (1) at a position corresponding to each transposition screw (101), and a guide slider (109) is fixed on the outer side of each slider (102) and is slidably matched with the inner side of the guide groove (110).

6. The high temperature resistant ball valve for high temperature steam transportation according to claim 1, characterized in that: One side of each valve seat (4) is provided with a chamfer (6) at the edge position.

7. The high temperature resistant ball valve for high temperature steam delivery according to claim 1, characterized in that: One end of each sliding rod (104) is rotatably connected to a roller (105).

8. The high temperature resistant ball valve for high temperature steam delivery according to claim 1, characterized in that: One side of each of the plurality of sealing rings (5) is provided with a spherical surface adapted to the outer side of the valve ball (2).

9. The high temperature resistant ball valve for high temperature steam delivery according to claim 4, characterized in that: Both ends of the valve body (1) are provided with locking mechanisms for locking the rotating ring (113), the locking mechanisms comprising a fixing plate (301) fixed to one side of the valve body (1), a locking screw (302) being threadedly connected at the middle section of the fixing plate (301), one end of the locking screw (302) being rotatably connected to a pressing plate (303), a plurality of locking teeth (304) being provided on one side of the pressing plate (303), the plurality of locking teeth (304) respectively meshing with the plurality of teeth (112), two guide rods (305) being fixed to one side of the pressing plate (303), the two guide rods (305) being slidably inserted into the interior of the fixing plate (301).

10. The high temperature resistant ball valve for high temperature steam transportation according to claim 1, characterized in that: The upper and lower ends of the valve ball (2) are rotatably connected to the valve body (1) via an upper rotating shaft (7) and a lower rotating shaft (8), respectively; an anti-accidental touch mechanism is provided between the upper rotating shaft (7) and the valve body (1); the anti-accidental touch mechanism comprises a fixed cylinder (405) fixed to the outside of the valve body (1), a spline sleeve (401) fixed to the outside of the upper rotating shaft (7), and a spline sleeve (402) movably sleeved on the outside of the upper rotating shaft (7); a lever (403) is fixed to the outside of the spline sleeve (402); and the lower side of the lever (403) is elastically connected to the upper end of the fixed cylinder (405) via a return spring (404).

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