A cryogenic floating ball valve

Abstract

This application relates to the technical field of ball valves, and discloses an ultra-low temperature floating ball valve, which includes a valve body. A perforation is provided on the valve body, and an installation hole communicating with the perforation is provided on the valve body. A sphere is provided on the valve body, and a through hole is provided on the sphere. A valve cover for blocking the installation hole is provided on the valve body. An operating component is provided inside the valve cover, and the operating component is used to drive the sphere to rotate. A first valve seat and a second valve seat are provided on the valve body. A disc spring is provided on the first valve seat, and the disc spring abuts against the hole wall of the perforation, and the first valve seat abuts against the sphere. The staff of this application directly installs the first valve seat, the second valve seat and the sphere into a whole, and installs the whole into the valve body from the installation hole, so that the disc spring can stably drive the first valve seat to move towards the second valve seat, making the installation of the sphere relatively simple, reducing the operation difficulty of the staff, and facilitating the staff to quickly install the sphere.

Description

Technical Field

[0001] The present application relates to the technical field of ball valves, and in particular to a cryogenic floating ball valve. Background Art

[0002] A ball valve is a valve in which a ball is driven by a valve stem and rotates around the axis of the ball valve. The pipeline is cut off or connected by rotating the ball. At the same time, it can also be used for the regulation and control of fluids. The ball valve can be applied to high-temperature or low-temperature occasions.

[0003] In the related art, the ball valve includes a valve body. A perforation is provided on the valve body. A ball is rotatably connected in the perforation. A valve cover is provided on the valve body. An operating component is provided on the valve cover. The operating component is used to drive the ball to rotate. An installation hole for installing the ball is provided on the valve body. The installation hole communicates with the perforation. Two valve seats are provided at the perforation. The ball is located between the two valve seats. A spring is fixedly connected to the valve seat. The spring abuts against the hole wall of the installation hole so that the valve seat abuts against the ball, increasing the sealing performance between the valve seat and the ball.

[0004] The staff first installs the two valve seats and the spring in the perforation, and then uses a special tool to expand the two valve seats, so that the ball is inserted into the two springs from the installation hole to complete the installation of the ball.

[0005] During the installation process of the ball, a special tooling is required, which is difficult for the staff to operate and the operation is relatively complex, which is not conducive to the quick installation of the ball. Summary of the Invention

[0006] In order to improve the problem that the ball is not easy to install, the present application provides a cryogenic floating ball valve.

[0007] A cryogenic floating ball valve provided by the present application adopts the following technical solutions:

[0008] A cryogenic floating ball valve includes a valve body. A perforation is provided on the valve body. An installation hole communicating with the perforation is provided on the valve body. A ball is provided on the valve body. A through hole is provided on the ball. A valve cover for blocking the installation hole is provided on the valve body. An operating component is provided in the valve cover. The operating component is used to drive the ball to rotate. A first valve seat and a second valve seat are provided on the valve body. A disc spring is provided on the first valve seat. The disc spring abuts against the hole wall of the perforation. The first valve seat abuts against the ball.

[0009] By adopting the above technical solution, the staff directly install the first valve seat, the second valve seat and the sphere as a whole, and install the whole into the valve body from the installation hole. Compared with the spring in the background art, the disc spring is not prone to torsion due to the relative movement of the two force application ends, so that the disc spring can stably drive the first valve seat to move towards the second valve seat, making the installation of the sphere relatively simple, without the need for the staff to operate with tools again, reducing the operation difficulty of the staff, and facilitating the staff to quickly install the sphere.

[0010] Optionally, a first valve ring is provided on the first valve seat, a receiving groove is formed on the first valve ring, the disc spring is fixedly connected in the receiving groove, and the disc spring abuts against the hole wall of the installation hole.

[0011] By adopting the above technical solution, since the disc spring is fixedly connected in the receiving groove, the groove wall of the receiving groove limits the disc spring, enabling the disc spring to be stably fixed on the first valve seat and reducing the possibility of separation between the disc spring and the first valve seat.

[0012] Optionally, a fastening bolt is provided on the valve cover, the fastening bolt is threadedly connected to the valve body, a fixed cover is rotatably connected to the valve cover, a placement groove for the fastening bolt to insert is formed on the fixed cover, a fixing plate for blocking the placement groove is slidably connected to the fixed cover, and a locking structure is provided on the fixing plate. When the fixing plate blocks the placement groove, the locking structure locks the fixing plate.

[0013] By adopting the above technical solution, the staff move the fixed cover to place the fastening bolt in the placement groove, then move the fixing plate to block the placement groove, and with the limitation of the locking structure on the fixing plate, it is difficult for external personnel to separate the valve cover and the valve body, reducing the possibility of external personnel deliberately damaging the ball valve, so that the fluid transported in the ball valve can be safer; at the same time, the fastening bolt is located in the placement groove, enabling the staff to determine whether the fastening bolt is tightened, avoiding the possibility of the ball valve loosening due to the fastening bolt not being tightened.

[0014] Optionally, the locking structure includes a locking bar and a stop bar. The locking bar is slidably connected to the fixing plate, a receiving groove for the locking bar to insert is formed on the fixed cover, a locking block is provided on the locking bar, and the stop bar is rotatably connected in the receiving groove. When the locking block is located in the receiving groove, the stop bar can be located on the separation path of the locking block.

[0015] By adopting the above technical solution, the staff member slides the locking bar. Since the stop bar is rotatably connected in the receiving groove, the locking bar pushes the stop bar to rotate, causing the locking block to insert into the receiving groove. At this time, the locking block is located in the receiving groove, making the stop bar on the disengagement path of the locking block, so that the stop bar restricts the locking block from disengaging from the receiving groove, thereby enabling the locking bar to be stably located in the receiving groove, enabling the fixing plate to stably block the placement groove, reducing the possibility of the fastening bolt disengaging from the placement groove, and further preventing external personnel from disassembling the fastening bolt.

[0016] Optionally, a stop spring is provided in the receiving groove, and a stop plate is provided on the stop spring. The stop spring drives the stop plate to abut against the stop bar. When the locking block is located in the receiving groove, the stop plate drives the locking block to abut against the stop bar.

[0017] By adopting the above technical solution, when the locking block is located in the receiving groove, the stop spring drives the stop plate to move, and the stop plate abuts against the locking bar, causing the locking block to move in the direction of the stop bar until the locking block abuts against the stop bar, so that the locking block limits the stop bar, preventing the stop bar from rotating and then being unable to continue limiting the locking block, further limiting the locking bar and reducing the possibility of the locking bar disengaging from the receiving groove.

[0018] Optionally, an operating bar is rotatably connected to the locking bar, and the stop bar is on the rotation path of the operating bar; when the operating bar abuts against the stop bar, the stop bar is not in the movement path of the locking block.

[0019] By adopting the above technical solution, the staff member first presses the locking bar so that the locking block does not abut against the stop bar, that is, the locking block does not restrict the stop bar from rotating, and then rotates the operating bar. Since the stop bar is on the rotation path of the operating bar, the operating bar can drive the stop bar to rotate in the receiving groove, enabling the locking block to be taken out of the receiving groove, so that the staff member does not need to use tools to drive the stop bar to rotate, facilitating the staff member to take out the locking bar from the receiving groove.

[0020] Optionally, a clamping block is provided on the operating bar, and a first card slot for the clamping block to insert is provided on the fixing cover. A second card slot communicating with the receiving groove is provided on the first card slot; when the locking block is not on the rotation path of the stop bar, the clamping block is located in the second card slot, and the operating bar can rotate in the receiving groove.

[0021] By adopting the above technical solution, when the staff inserts the locking bar into the receiving groove, the operating bar is located on the locking bar, and the operating bar moves along with the locking bar, so that the clamping block is located in the first card slot, realizing the locking of the operating bar. Then, the staff presses the locking bar, making the locking block not abut against the stopping bar until the locking block is not on the rotation path of the stopping bar. At this time, the clamping block can be located in the second card slot, realizing the unlocking of the operating bar, allowing the operating bar to rotate in the receiving groove, so as to facilitate the staff to drive the operating bar to rotate and drive the stopping bar to rotate; the staff can unlock the operating bar while pressing the locking bar, enabling the staff to know when to rotate the operating bar, reducing the situation where the operating bar and the stopping bar are jammed due to premature rotation of the operating bar while the stopping bar is not unlocked; at the same time, the clamping block is located in the first card slot, making it difficult for external personnel to directly rotate the operating bar, locking the operating bar and reducing the possibility of the operating bar rotating.

[0022] Optionally, a moving bar is provided on the fixed cover, a moving spring is provided on the moving bar, a moving groove for inserting the moving bar is opened on the valve cover, and the moving spring drives the moving bar to insert into the moving groove. When the moving bar is inserted into the moving groove, the fixing plate seals the placing groove.

[0023] By adopting the above technical solution, the moving spring drives the moving bar to insert into the moving groove, and the moving bar is limited by the groove wall of the moving groove, so that the moving bar cannot move, and the fixed cover can be fixed on the valve cover, reducing the situation where external personnel forcibly pull open the fixed cover.

[0024] Optionally, an activity hole is opened on the fixed cover, and an activity bar for inserting into the activity hole is slidably connected to the valve cover. When the activity bar is located in the activity hole, the fastening bolt is not in the placing groove.

[0025] By adopting the above technical solution, by sliding the activity bar and inserting the activity bar into the activity hole, the fixed cover and the activity bar can be fixed to each other, reducing the possibility of the fixed cover sliding on the valve cover, further increasing the stability of the fixed cover fixed on the valve cover, and reducing the possibility of external personnel forcibly removing the fixed cover.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The staff directly installs the first valve seat, the second valve seat and the sphere into a whole, and installs the whole into the valve body from the installation hole. Compared with the spring in the background technology, the disc spring is not prone to torsion due to the relative movement of the two force application ends, so that the disc spring can stably drive the first valve seat to move towards the second valve seat, making the installation of the sphere relatively simple, without the need for the staff to operate with tools again, reducing the operation difficulty of the staff, and facilitating the staff to quickly install the sphere.

[0028] 2. The staff slides the locking bar. Since the stop bar is rotatably connected in the receiving groove, the locking bar pushes the stop bar to rotate, causing the locking block to insert into the receiving groove. At this time, the locking block is located in the receiving groove, making the stop bar on the detachment path of the locking block, so that the stop bar restricts the locking block from detaching from the receiving groove, thereby enabling the locking bar to be stably located in the receiving groove, enabling the fixing plate to stably block the placement groove, reducing the possibility of the fastening bolt detaching from the placement groove, and further preventing external personnel from disassembling the fastening bolt. Description of the Drawings

[0029] Figure 1 is a schematic structural diagram of Embodiment 1;

[0030] Figure 2 is a cross-sectional view highlighting the sphere in Embodiment 1;

[0031] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0032] Figure 4 is a schematic structural diagram of Embodiment 2;

[0033] Figure 5 is along Figure 4 a cross-sectional view taken along line B-B in

[0034] Figure 6 is an exploded schematic view highlighting the movable groove in Embodiment 2;

[0035] Figure 7 is along Figure 4 a partial cross-sectional view taken along line C-C in

[0036] Figure 8 is an exploded schematic view highlighting the convex clamping block in Embodiment 2.

[0037] Reference Numerals: 1, valve body; 11, perforation; 12, mounting hole; 13, sphere; 131, through hole; 14, first valve seat; 141, first valve ring; 142, receiving groove; 143, disc spring; 15, second valve seat; 151, second valve ring; 2, valve cover; 21, fastening bolt; 22, operating assembly; 23, movable groove; 231, movable bar; 232, movable spring; 24, moving groove; 3, fixed cover; 31, placement groove; 32, fixing plate; 33, movable hole; 331, movable ring; 34, receiving groove; 341, groove; 342, stop spring; 343, stop plate; 35, first card slot; 351, second card slot; 352, third card slot; 36, moving block; 361, moving bar; 362, moving spring; 4, locking structure; 41, locking bar; 411, locking block; 42, stop bar; 43, operating slot; 431, operating bar; 432, clamping block. Detailed implementation mode

[0038] The following will further elaborate on this application in conjunction with the appended Figures 1-8 drawings.

[0039] Example 1

[0040] This example discloses an ultra-low temperature floating ball valve. Refer to Figure 1 and Figure 2 . An ultra-low temperature floating ball valve includes a valve body 1. A perforation 11 is provided on the surface of the valve body 1, and the perforation 11 allows fluid to pass through. A valve cover 2 is provided on the valve body 1. Two fastening bolts 21 are provided on the valve cover 2. The fastening bolts 21 pass through the valve cover 2 and are threadedly connected to the valve body 1 to realize the mutual fixation of the valve cover 2 and the valve body 1.

[0041] Refer to Figure 2 . An installation hole 12 communicating with the perforation 11 is provided on the surface of the valve body 1. The installation hole 12 is square, and the processing steps are few. A sphere 13 is provided in the installation hole 12, and a through hole 131 is provided on the sphere 13. When the through hole 131 is aligned with the perforation 11, the valve body 1 is opened; when the sphere 13 blocks the perforation 11, the valve body 1 is closed.

[0042] Refer to Figure 2 and Figure 3 . A first valve seat 14 and a second valve seat 15 are provided on the valve body 1, and the sphere 13 is located between the first valve seat 14 and the second valve seat 15. A first valve ring 141 is fixedly connected to the surface of the first valve seat 14 away from the second valve seat 15. A receiving groove 142 is provided on the surface of the first valve ring 141 away from the first valve seat 14, and a disc spring 143 is fixedly connected in the receiving groove 142. A second valve ring 151 is fixedly connected to the surface of the second valve seat 15. The first valve seat 14 and the second valve seat 15 are made of polychlorotrifluoroethylene, and both the first valve ring 141 and the second valve ring 151 are made of metal.

[0043] Refer to Figure 2 and Figure 3 . First, the first valve seat 14, the sphere 13 and the second valve seat 15 are combined, and then the first valve seat 14, the sphere 13 and the second valve seat 15 are installed into the perforation 11 from the opening of the installation hole 12. The disc spring 143 abuts against the bottom wall of the receiving groove 142 and the hole wall of the installation hole 12, and the second valve seat 15 abuts against the hole wall of the installation hole 12, so that the sphere 13 can be fixed in the installation hole 12 and the sphere 13 can rotate in the installation hole 12. The sphere 13 can float within a small range and move by the elastic force of the disc spring 143. Due to the pressure of the medium in the perforation 11 pushing the sphere 13 to abut against the second valve seat 15, the sealing of the perforation 11 by the sphere 13 and the second valve seat 15 is realized

[0044] Refer to Figure 2, an operating component 22 is provided on the valve cover 2, and the operating component 22 is used to drive the sphere 13 to rotate, so as to facilitate the staff to control the opening and closing of the ball valve.

[0045] The implementation principle of Embodiment 1 is: Since the disc spring 143 is arranged in the accommodation groove 142, the disc spring 143 can drive the first valve seat 14 to move towards the second valve seat 15, so that the disc spring 143 can realize the sealing of the sphere 13.

[0046] Embodiment 2

[0047] Refer to Figure 4 and Figure 5 , the difference between this embodiment and Embodiment 1 is that a fixed cover 3 is provided on the outer surface of the valve cover 2, and two placement grooves 31 are opened on the surface of the fixed cover 3 for the fastening bolts 21 to be inserted. Two fixing plates 32 are slidably connected to the fixed cover 3, and each fixing plate 32 can block a different placement groove 31. When the fastening bolts 21 are fully installed, the fastening bolts 21 can be inserted into the placement grooves 31; when the fastening bolts 21 are not fully installed, the fastening bolts 21 cannot be inserted into the placement grooves 31.

[0048] Refer to Figure 5 and Figure 6 , an activity groove 23 is opened on the valve cover 2, an activity spring 232 is fixedly connected to the bottom wall of the activity groove 23, and an activity bar 231 is fixedly connected to the surface of the activity spring 232 away from the bottom wall of the activity groove 23. An activity ring 331 is fixedly connected to the fixed cover 3, and an activity hole 33 for the activity bar 231 to be inserted is opened on the surface of the activity ring 331. When the activity bar 231 is inserted into the activity hole 33, the fastening bolts 21 are not in the placement grooves 31, so as to facilitate the staff to turn the fastening bolts 21.

[0049] Refer to Figure 7 , a locking structure 4 is provided on the fixing plate 32, and the locking structure 4 is used to limit the sliding of the fixing plate 32. The locking structure 4 includes a locking bar 41 and a stopping bar 42, and the locking bar 41 is slidably connected to the fixing plate 32. A receiving groove 34 for the locking bar 41 to be inserted is opened on the surface of the fixed cover 3, and a groove 341 is opened on the groove wall of the receiving groove 34. The groove 341 extends along the length direction of the receiving groove 34 and does not penetrate to the surface of the fixed cover 3. The stopping bar 42 is rotatably connected in the groove 341, that is, the stopping bar 42 can rotate towards the bottom wall of the receiving groove 34, so that the stopping bar 42 cannot rotate out of the receiving groove 34.

[0050] Refer to Figure 7, a stop spring 342 is fixedly connected to the bottom wall of the receiving groove 34. A stop plate 343 is provided in the receiving groove 34, and the stop plate 343 is fixedly connected to the surface of the stop spring 342 away from the bottom wall of the receiving groove 34. The stop spring 342 drives the stop plate 343 to move away from the bottom wall of the receiving groove 34, that is, when the stop plate 343 is located in the receiving groove 34, the stop spring 342 is in a compressed state. A locking block 411 is integrally formed on the surface of the locking bar 41, and only the locking bar 41 can pass between the stop bar 42 and the groove wall of the receiving groove 34 away from the groove 341. An inclined surface is formed on the surface of the locking block 411 facing the bottom wall of the receiving groove 34, and the distance between the inclined surface and the bottom wall of the groove 341 gradually decreases along the direction from the locking block 411 to the bottom wall of the receiving groove 34.

[0051] Referring to Figure 5 and Figure 7 , the staff drives the locking bar 41 to abut against the bottom wall of the receiving groove 34. At this time, the locking block 411 is not on the rotation path of the stop bar 42, and the stop bar 42 normally falls. Then, the stop spring 342 drives the locking bar 41 to move through the stop plate 343, so that the locking bar 41 moves away from the bottom wall of the receiving groove 34 until the locking block 411 abuts against the stop bar 42, realizing the fixation of the locking bar 41. At this time, the fixing plate 32 completely blocks the opening of the placement groove 31.

[0052] Referring to Figure 7 and Figure 8 , an operation groove 43 is formed on the surface of the locking bar 41, and an operation bar 431 is rotatably connected to the groove wall of the operation groove 43. A clamping block 432 is integrally formed on the surface of the operation bar 431. A first clamping groove 35 communicating with the receiving groove 34 is formed on the surface of the fixing cover 3 where the receiving groove 34 is opened, and the first clamping groove 35 allows the clamping block 432 to be inserted. A second clamping groove 351 is formed on the groove wall of the first clamping groove 35, and the second clamping groove 351 allows the clamping block 432 to pass through. A third clamping groove 352 communicating with the second clamping groove 351 is formed on the surface of the fixing cover 3. When the locking bar 41 is located in the receiving groove 34, the clamping block 432 can be located in the first clamping groove 35. When the clamping block 432 is located in the second clamping groove 351, the locking block 411 is not on the rotation path of the stop bar 42. When the clamping block 432 is located in the third clamping groove 352, the locking block 411 can be disengaged from the receiving groove 34.

[0053] Referring to Figure 7 and Figure 8 , the staff presses the locking bar 41 to disengage the locking block 411 from the rotation path of the stop bar 42. At this time, the clamping block 432 can pass through the second clamping groove 351. The staff rotates the operation bar 431 to drive the stop bar 42 to rotate, so that the stop bar 42 is not on the disengaging path of the locking block 411, facilitating the staff to take out the locking bar 41 from the receiving groove 34.

[0054] Reference Figure 5 As shown in Figure 5 , a moving block 36 is fixedly connected to the fixed cover 3, and a moving bar 361 is integrally formed on the surface of the moving block 36. Two moving grooves 24 are formed on the outer surface of the valve cover 2, and both of the two moving grooves 24 are for inserting the moving bar 361. A moving spring 362 is fixedly connected to the surface of the moving block 36 away from the moving bar 361, and the moving spring 362 drives the moving block 36 to insert into the moving groove 24. When the moving block 36 is inserted into the moving groove 24, the moving spring 362 is in a compressed state, and at this time, the fastening bolt 21 is located in the placement groove 31.

[0055]

[0056] The implementation principle of Embodiment 2 is as follows: First, the staff presses the locking bar 41 to move the block 432 to a position where it can rotate to the second card slot 351, then rotates the operating bar 431 to drive the stop bar 42 to rotate until the stop bar 42 is not on the detachment path of the locking block 411, then takes out the locking bar 41 from the accommodation groove 34, and finally slides the fixed plate 32 and rotates the fixed cover 3 to disengage the fastening bolt 21 from the placement groove 31.

[0057] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the field to which this application belongs. The words "first", "second", "third" and similar terms used in the specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. The words "a" or "an" and the like do not denote a limitation of quantity, but mean that there is at least one. The words "comprising" or "including" and the like mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "upper", "lower", "left", "right" and the like are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly. The above are only the preferred embodiments of this application and are not used to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the design concept of this application shall be included in the protection scope of this application.

Claims

1. A cryogenic floating ball valve, comprising a valve body (1), the valve body (1) being provided with a through hole (11), the valve body (1) being provided with a mounting hole (12) communicating with the through hole (11), the valve body (1) being provided with a ball (13), the ball (13) being provided with a through hole (131), the valve body (1) being provided with a valve cover (2) for blocking the mounting hole (12), the valve cover (2) being provided with an operating component (22), the operating component (22) being used for driving the ball (13) to rotate, characterized in that: The valve body (1) is provided with a first valve seat (14) and a second valve seat (15); the first valve seat (14) is provided with a disc spring (143); the disc spring (143) abuts against the hole wall of the through hole (11); and the first valve seat (14) abuts against the ball (13); The valve cover (2) is provided with a fastening bolt (21), and the fastening bolt (21) is threadedly connected to the valve body (1). The valve cover (2) is rotatably connected with a fixing cover (3), and the fixing cover (3) is provided with a placement groove (31) for inserting the fastening bolt (21). The fixing cover (3) is slidably connected with a fixing plate (32) for blocking the placement groove (31), and the fixing plate (32) is provided with a locking structure (4). When the fixing plate (32) blocks the placement groove (31), the locking structure (4) realizes locking of the fixing plate (32); The locking structure (4) comprises a locking strip (41) and a stop strip (42), wherein the locking strip (41) is slidably connected to the fixing plate (32), the fixing cover (3) is provided with a receiving groove (34) for inserting the locking strip (41), the locking strip (41) is provided with a locking block (411), the stop strip (42) is rotatably connected to the receiving groove (34), and when the locking block (411) is located in the receiving groove (34), the stop strip (42) can be located on a disengagement path of the locking block (411); A stop spring (342) is provided in the receiving groove (34), a stop plate (343) is provided on the stop spring (342), the stop spring (342) drives the stop plate (343) to abut against the stop strip (42), and when the locking block (411) is located in the receiving groove (34), the stop plate (343) drives the locking block (411) to abut against the stop strip (42); The locking bar (41) is rotatably connected to an operating bar (431), and the stop bar (42) is located on a rotation path of the operating bar (431); when the operating bar (431) abuts against the stop bar (42), the stop bar (42) is not in a moving path of the locking block (411); The operating bar (431) is provided with a card block (432); the fixed cover (3) is provided with a first card slot (35) for inserting the card block (432); the first card slot (35) is provided with a second card slot (351) connected to the receiving slot (34); when the locking block (411) is not on the rotation path of the stop bar (42), the card block (432) is located in the second card slot (351), and the operating bar (431) can rotate in the receiving slot (34).

2. The ultra-low temperature floating ball valve according to claim 1, characterized in that: The first valve seat (14) is provided with a first valve ring (141), the first valve ring (141) is provided with a receiving groove (142), the disc spring (143) is fixedly connected in the receiving groove (142), and the disc spring (143) abuts against the hole wall of the mounting hole (12).

3. The ultra-low temperature floating ball valve according to claim 1, characterized in that: The fixed cover (3) is provided with a moving bar (361), and the moving bar (361) is provided with a moving spring (362). The valve cover (2) is provided with a moving groove (24) for the moving bar (361) to be inserted. The moving spring (362) drives the moving bar (361) to be inserted into the moving groove (24). When the moving bar (361) is inserted into the moving groove (24), the fixed plate (32) blocks the placement groove (31).

4. The ultra-low temperature floating ball valve according to claim 1, characterized in that: The fixed cover (3) is provided with a movable hole (33), and the valve cover (2) is slidably connected with a movable bar (231) for inserting into the movable hole (33). When the movable bar (231) is located in the movable hole (33), the fastening bolt (21) is not located in the placement groove (31).

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