Hard sealing ball valve with low-temperature protection function

Abstract

The invention discloses a hard sealing ball valve with a low-temperature protection function, which comprises a ball valve first connecting pipe, a ball valve second connecting pipe arranged on the outer side of the ball valve first connecting pipe, a ball valve bead mounted in the ball valve first connecting pipe, a first connecting outer ring, a second connecting outer ring and a second connecting outer ring, a first connecting outer ring is welded and fixed to the outer end of the ball valve first connecting pipe, and a second connecting outer ring is arranged at the outer end of the first connecting outer ring in an attached mode. According to the hard sealing ball valve with the low-temperature protection function, the problems that an existing hard sealing ball valve cannot effectively conduct connection buffering on internal parts, the internal parts cannot be better used for a long time, when the ball valve is used, due to the fact that winter comes, the ball valve is prone to being damaged, the ball valve cannot be better subjected to low-temperature protection, and the service life of the ball valve is prolonged are solved. And in summer, due to the fact that the temperature is too high, automatic protection mechanism opening and effective heat dissipation are not conveniently conducted on the ball valve better, and the ball valve is not suitable for being used in various weathers.

Description

Technical Field

[0001] The invention relates to the technical field of hard-sealed ball valves, in particular to a hard-sealed ball valve with a low-temperature protection function. Background Art

[0002] A ball valve is a valve whose opening and closing part (ball) is driven by the valve stem and rotates around the axis of the ball valve. The ball valve can be opened and closed by rotating 90 degrees. It is easy to operate and has low fluid resistance. It is widely used in the petroleum, chemical, electric power and other industries. Due to its compact structure, reliable sealing and convenient operation, the ball valve occupies an important position in the national economy, such as:

[0003] A hard-sealed ball valve provided by announcement number CN107044546A includes a valve body, a valve stem, a ball, a hard-sealed valve seat and a valve stem driving device, a flow channel is arranged in the valve body, the valve stem and the ball are arranged in linkage, the hard-sealed valve seat is installed in the flow channel and is sealed with the ball, the ball includes sub-balls symmetrically arranged on both sides of the valve stem rotating shaft, the cross-sections of the sub-balls on both sides are arc-shaped and the openings are opposite, the arc-shaped lower end of the sub-ball is a mounting end that is rotationally matched with the mounting end of another sub-ball, and the arc-shaped upper end is a swing end that approaches and moves away from the swing end of another sub-ball, the end of the valve stem and the ball linkage is provided with a guide for guiding the swing end of the ball to approach and rotate, and the swing end of each sub-ball is provided with a linkage cavity for the guide block to extend into, and the valve body is provided with a valve stem linkage part around the valve stem and coaxially with the valve stem. By adopting the above scheme, the present invention provides a hard-sealed ball valve that prolongs the service life of the valve seat, shortens the valve response time, and reduces the starting torque requirement of the valve stem driving device.

[0004] Another example is a new hard-sealed ball valve provided by announcement number CN109268528A, which includes a main valve body and a sub-valve body fixedly connected by bolts, the main valve body includes a main valve seat, the sub-valve body includes a sub-valve seat, the ball valve is connected to the main valve body and the sub-valve body through the main valve seat and the sub-valve seat, respectively, and the top and bottom of the ball valve are respectively provided with an upper rotating unit and a lower rotating unit with the same structure. They respectively include a first valve stem and a second valve stem, which can respectively apply a rotational force to the ball valve to rotate the ball valve, and ensure that the valve stem will not be damaged due to excessive torque, so that the ball valve can be subjected to twice the rotation relative to only one valve stem.

[0005] The above-mentioned prior art solutions have the following defects:

[0006] 1. Although the existing hard-sealed ball valve can shorten the valve response time and reduce the starting torque requirement of the valve stem drive device during use, it cannot effectively connect and buffer the internal parts while rotating to close and open, which is not conducive to better long-term use of the internal parts.

[0007] 2. When using the ball valve, the ball valve is easily damaged due to the coming of winter, and it is not convenient to better protect the ball valve from low temperatures.

[0008] 3. In summer, due to the high temperature, it is not convenient to open the automatic protection mechanism of the ball valve better and dissipate heat effectively, and it is not suitable for use in various weather conditions. Therefore, the present invention provides a hard-sealed ball valve with low-temperature protection function to solve the above-mentioned problems. Summary of the invention

[0009] The purpose of the present invention is to provide a hard-sealed ball valve with a low-temperature protection function to solve the problems raised in the above background technology that the existing hard-sealed ball valve cannot effectively connect and buffer the internal parts, is not convenient for long-term use of the internal parts, is easily damaged when the ball valve is used due to the coming of winter, and is not convenient for better low-temperature protection of the ball valve. In summer, the temperature is too high and it is not convenient to better open the automatic protection mechanism of the ball valve, effectively dissipate heat, and is not suitable for use in various weather conditions.

[0010] To achieve the above object, the present invention provides the following technical solution: a hard-sealed ball valve with low temperature protection function, comprising: a first connecting pipe of the ball valve, a second connecting pipe of the ball valve arranged outside the first connecting pipe of the ball valve, and a ball valve bead installed inside the first connecting pipe of the ball valve, and further comprising:

[0011] A first connecting outer ring, the outer end of the first connecting pipe of the ball valve is welded and fixed with the first connecting outer ring, and the outer end of the first connecting outer ring is fitted with the second connecting outer ring, and the insides of the first connecting outer ring and the second connecting outer ring are both installed with threaded rods, the outer surfaces of the threaded rods are provided with nuts, the inside of the ball valve bead is provided with a ball valve through groove, and the lower end of the first connecting pipe of the ball valve is connected to the insulation bottom plate;

[0012] A connecting tube is fixedly arranged at the middle part of the upper end of the first connecting tube of the ball valve, and a first protective plate is arranged on the outer side of the connecting tube, the outer end of the first protective plate is rotatably connected to the second protective plate, and the insides of the first protective plate and the second protective plate are both provided with insulation tubes, a motor is arranged at the upper end of the first protective plate, a side protective outer plate is penetrated and connected to the inside of the first protective plate, a connecting groove is opened at the inner upper end of the second protective plate, and a T-shaped groove is opened on the lower side of the connecting groove.

[0013] As a preferred technical solution of the present invention, the ball valve groove also includes a spacer column arranged at the upper end of the ball valve groove, and a connecting groove is opened inside the spacer column, a blocking block is arranged inside the connecting groove, and a spring is installed on the outer surface of the blocking block, a supporting pressure rod is arranged at the upper end of the blocking block, and a handle rod is arranged at the upper end of the supporting pressure rod, and a connecting top cover connected to the connecting tube is arranged on the outer side of the supporting pressure rod.

[0014] As a preferred technical solution of the present invention, the blocking block is arranged at equal angles on the outer surface of the lower end of the supporting pressure rod, and a groove structure matching the blocking block is opened at equal angles inside the connecting groove, and the supporting pressure rod is relatively slidably connected to the spacer column through a spring.

[0015] As a preferred technical solution of the present invention, the motor also includes a stabilizing support rod arranged at the lower end of the motor, and a ring block is installed on the outer surface of the stabilizing support rod, and the outer end of the ring block is fixedly connected to the stabilizing rod, and the outer end of the ring block is provided with a fixing rod.

[0016] As a preferred technical solution of the present invention, the stabilizing support rod is connected to the collar block by means of threads, and the collar block is connected to the second protective plate by means of sliding through the stabilizing rod.

[0017] As a preferred technical solution of the present invention, the collar block is fixedly connected to the side protection outer plate through a fixing rod, and the side protection outer plate is connected to the first protection plate in a sliding manner.

[0018] As a preferred technical solution of the present invention, the stabilizing support rod also includes a protective block arranged at the lower end of the stabilizing support rod, and a mounting disc fixedly connected to the stabilizing support rod is arranged inside the protective block, a limiting disc is arranged at the outer end of the mounting disc, and a first support rod is installed at the outer end of the limiting disc, a second support rod is arranged inside the first support rod, and a stabilizing outer block is installed at the outer end of the second support rod, and a T-shaped outer plate is arranged at the outer end of the stabilizing outer block.

[0019] As a preferred technical solution of the present invention, the mounting disc and the limiting disc are connected in a meshing manner, and the limiting disc is fixedly connected to the first support rod.

[0020] As a preferred technical solution of the present invention, the first support rod and the second support rod are connected in a threaded manner, and the thread directions at the front and rear ends of the second support rod are opposite.

[0021] As a preferred technical solution of the present invention, the stabilizing outer block is connected to the T-shaped outer plate in a rotating manner, and the T-shaped outer plate is connected to the second protective plate in a sliding manner.

[0022] Compared with the prior art, the invention has the following beneficial effects: the hard-sealed ball valve with low-temperature protection function solves the problems that the existing hard-sealed ball valve cannot effectively connect and buffer the internal parts, is not convenient for better long-term use of the internal parts, is easy to be damaged in winter when the ball valve is used, is not convenient for better low-temperature protection of the ball valve, is not convenient for better opening of the automatic protection mechanism of the ball valve in summer due to excessively high temperature, effectively dissipates heat, and is not suitable for use in various weather conditions;

[0023] 1. The blocking block is arranged at equal angles on the outer surface of the lower end of the support pressure rod, and a groove structure that matches the blocking block is opened at equal angles inside the connecting groove, and the support pressure rod is relatively slidably connected with the spacer column through a spring. The blocking block is connected to the spacer column through the setting of the blocking block. When the support pressure rod is rotated, the support pressure rod can drive the ball valve bead to rotate through the spacer column, which is convenient for adjusting the switch of the ball valve. At the same time, when rotating, the spring is extended and retracted, and the blocking block slides inside the spacer column, so that the ball valve bead is stably fitted with the inner wall of the first connecting pipe of the ball valve, so as to buffer the inside during rotation, thereby increasing the service life of the parts;

[0024] 2. The T-shaped outer plate is connected to the second protective plate in a sliding manner. By starting the motor, the motor drives the stabilizing support rod to rotate, and the collar block slides on the outer surface of the stabilizing support rod. When the collar block slides, a connecting groove is provided at the inner upper end of the second protective plate, and a T-shaped groove is provided on the lower side of the connecting groove. The stabilizing rod slides inside the T-shaped groove following the collar block, and the collar block drives the side protective outer plate to slide inside the second protective plate, thereby opening the left and right ends of the ball valve. By moving the side protective outer plate, the ball valve can be closed at both ends at the same time, thereby increasing the protection and improving the low-temperature protection degree.

[0025] 3. By rotating the stabilizing support rod, the mounting disc will rotate accordingly, and the mounting disc will drive the limiting disc to rotate, so that the second support rod will move inside the first support rod. At the same time, the stabilizing outer block will rotate inside the T-shaped outer plate, so that the T-shaped outer plate will move in the T-slot inside the second protective plate, so that the second protective plate will rotate at the outer end of the first protective plate, so that the second protective plate will tilt. When the second protective plate is rotated, when it is open, the outer end of the ball valve will be opened for heat dissipation, which is convenient for use in summer. In winter, the stabilizing support rod will be rotated in the opposite direction, so as to close the outer end of the ball valve for protection, which plays a role in low temperature protection. Automatic opening and closing improves the level of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the connection between the first protective plate and the second protective plate of the present invention;

[0028] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the connection between the second protective plate and the thermal insulation bottom plate of the present invention;

[0029] Figure 4 It is a schematic diagram of the overall cross-sectional structure of the connection between the first connecting pipe of the ball valve and the through groove of the ball valve of the present invention;

[0030] Figure 5 This is a schematic diagram of the overall cross-sectional structure of the connection between the thermal insulation bottom plate and the second protective plate of the present invention;

[0031] Figure 6 This is a schematic diagram of the overall explosion structure of the first support rod and the second support rod connected to each other in the present invention;

[0032] Figure 7 This is a schematic diagram of the overall cross-sectional structure of the connection between the connecting tube and the protection block of the present invention;

[0033] Figure 8 For the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0034] Fig. 9 It is a schematic diagram of the overall explosion structure of the ball valve ball and the supporting pressure rod connected to each other in the present invention;

[0035] Fig.10 For the present invention Figure 7 Enlarged structural diagram at B in the middle.

[0036] In the figure: 1. first connecting pipe of ball valve; 2. first connecting outer ring; 3. second connecting pipe of ball valve; 4. second connecting outer ring; 5. threaded rod; 6. nut; 7. ball valve ball; 8. ball valve groove; 9. spacer column; 10. connecting groove; 11. supporting pressure rod; 12. blocking block; 13. spring; 14. connecting top cover; 15. handle bar; 16. connecting tube; 17. first protective plate; 18. second protective plate; 19. insulation pipe; 20. insulation bottom plate; 21. motor; 22. stabilizing support rod; 23. collar block; 24. stabilizing rod; 25. fixing rod; 26. protective block; 27. mounting disc; 28. limiting disc; 29. ​​first supporting rod; 30. second supporting rod; 31. stabilizing outer block; 32. T-shaped outer plate; 33. side protective outer plate; 34. T-shaped slot; 35. connecting slot. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-10The present invention provides a technical solution: a hard-sealed ball valve with low-temperature protection function, comprising a first connecting pipe 1 of the ball valve, a second connecting pipe 3 of the ball valve arranged outside the first connecting pipe 1 of the ball valve, and a ball valve bead 7 installed inside the first connecting pipe 1 of the ball valve, and further comprising: a first connecting outer ring 2, the first connecting outer ring 2 is welded and fixed to the outer end of the first connecting pipe 1 of the ball valve, and the second connecting outer ring 4 is fitted to the outer end of the first connecting outer ring 2, and the first connecting outer ring 2 and the second connecting outer ring 4 are both installed with threaded rods 5 inside, such as Figure 1 and Figure 4 In the embodiment, a nut 6 is provided on the outer surface of the threaded rod 5, a ball valve groove 8 is provided inside the ball valve bead 7, and the lower end of the first connecting pipe 1 of the ball valve is connected to the insulation bottom plate 20; by rotating the handle rod 15, the handle rod 15 drives the support pressure rod 11 to rotate, so that the support pressure rod 11 drives the ball valve bead 7 to rotate, and at this time, the ball valve groove 8 and the second connecting pipe 3 of the ball valve are horizontally opened, so that water is transported to the other end of the second connecting pipe 3 of the ball valve through the second connecting pipe 3 of the ball valve for discharge, as shown in the specific example. Figure 2 and Figure 5 In the figure, a connecting cylinder 16 is fixedly arranged at the middle part of the upper end of the first connecting tube 1 of the ball valve, and a first protective plate 17 is arranged on the outer side of the connecting cylinder 16, and the outer end of the first protective plate 17 is rotatably connected to the second protective plate 18, and the insides of the first protective plate 17 and the second protective plate 18 are both provided with insulation pipes 19, and a motor 21 is arranged at the upper end of the first protective plate 17, and the inside of the first protective plate 17 is penetrated by a side protective outer plate 33, and the outer end of the ball valve is protected by the first protective plate 17, the second protective plate 18 and the insulation bottom plate 20, and at the same time, the setting of the insulation pipe 19 can well insulate the outer end of the ball valve, thereby providing low temperature protection.

[0039] Specific as Figure 7 and Fig. 9In the embodiment, the ball valve groove 8 also includes a spacer column 9 arranged at the upper end of the ball valve groove 8, and a connecting groove 10 is opened inside the spacer column 9, a blocking block 12 is arranged inside the connecting groove 10, and a spring 13 is installed on the outer surface of the blocking block 12, a support pressure rod 11 is arranged at the upper end of the blocking block 12, and a handle rod 15 is arranged at the upper end of the support pressure rod 11, and a connecting top cover 14 connected to the connecting tube 16 is arranged on the outer side of the support pressure rod 11, and the blocking block 12 is arranged at equal angles on the outer surface of the lower end of the support pressure rod 11, and a spring 13 is opened inside the connecting groove 10 at equal angles to match the blocking block 12. The groove structure is provided, and the support pressure rod 11 is connected to the spacer column 9 by a spring 13 for relative sliding. The block block 12 is connected to the spacer column 9 by setting the block block 12. When the support pressure rod 11 is rotated, the support pressure rod 11 can drive the ball valve bead 7 to rotate through the spacer column 9, which is convenient for adjusting the switch of the ball valve. At the same time, when rotating, the spring 13 is extended and retracted, and the block block 12 is slid inside the spacer column 9, so that the ball valve bead 7 is stably fitted with the inner wall of the first connecting pipe 1 of the ball valve, thereby buffering the inside during rotation, thereby increasing the service life of the parts.

[0040] Specific as Figure 3 and Figure 6In the embodiment, the motor 21 further comprises a stabilizing support rod 22 arranged at the lower end of the motor 21, and a collar block 23 is installed on the outer surface of the stabilizing support rod 22, and a stabilizing rod 24 is fixedly connected to the outer end of the collar block 23, and a fixing rod 25 is arranged at the outer end of the collar block 23, the stabilizing support rod 22 and the collar block 23 are connected in a threaded manner, and the collar block 23 is connected to the second protective plate 18 in a sliding manner through the stabilizing rod 24, the collar block 23 is fixedly connected to the side protective outer plate 33 through the fixing rod 25, and the side protective outer plate 33 is connected to the first The protective plate 17 is connected in a sliding manner, and the stabilizing support rod 22 also includes a protective block 26 arranged at the lower end of the stabilizing support rod 22, and a mounting disc 27 fixedly connected to the stabilizing support rod 22 is arranged inside the protective block 26, and a limiting disc 28 is arranged at the outer end of the mounting disc 27, and a first support rod 29 is installed at the outer end of the limiting disc 28, a second support rod 30 is arranged inside the first support rod 29, and a stabilizing outer block 31 is installed at the outer end of the second support rod 30, and a T-shaped outer plate 32 is arranged at the outer end of the stabilizing outer block 31, and the mounting disc 27 is provided with a limiting disc 28. The mounting disc 27 is connected to the limiting disc 28 in an engaging manner, and the limiting disc 28 is fixedly connected to the first support rod 29, the first support rod 29 is connected to the second support rod 30 in a threaded manner, and the threads at the front and rear ends of the second support rod 30 are in opposite directions, the stabilizing outer block 31 is connected to the T-shaped outer plate 32 in a rotating manner, and the T-shaped outer plate 32 is connected to the second protective plate 18 in a sliding manner, and by starting the motor 21, the motor 21 drives the stabilizing support rod 22 to rotate, and at the same time the collar block 23 is in the stabilizing support The outer surface of the rod 22 slides. When the ring block 23 slides, a connecting groove 35 is opened at the upper end of the inner part of the second protective plate 18, and a T-shaped groove 34 is opened on the lower side of the connecting groove 35. The stabilizing rod 24 slides inside the T-shaped groove 34 along with the ring block 23, and the ring block 23 drives the side protective outer plate 33 to slide inside the second protective plate 18, thereby opening the left and right ends of the ball valve. By moving the side protective outer plate 33, the two sides of the ball valve can be closed at the same time, thereby increasing the protection and improving the low-temperature protection degree.

[0041] Specific as Figure 8 and Fig.10When the stabilizing support rod 22 is rotated at the same time, the mounting disc 27 is rotated accordingly, and the mounting disc 27 drives the limiting disc 28 to rotate, thereby moving the second support rod 30 inside the first support rod 29, and at the same time, the stabilizing outer block 31 is rotated inside the T-shaped outer plate 32, so that the T-shaped outer plate 32 moves in the T-shaped slot 34 inside the second protective plate 18, so that the second protective plate 18 is rotated at the outer end of the first protective plate 17, thereby tilting the second protective plate 18, and rotating the second protective plate 18. When it is open, the outer end of the ball valve will be opened for heat dissipation, which is convenient for use in summer. In winter, the stabilizing support rod 22 will be rotated in the opposite direction, so as to close the outer end of the ball valve for protection, play a role in low temperature protection, and automatically open and close to improve the level of automation. This is the method of using the hard-sealed ball valve with low temperature protection function.

[0042] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0043] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hard-sealed ball valve with low-temperature protection function, comprising: A first ball valve connecting pipe (1), a second ball valve connecting pipe (3) arranged outside the first ball valve connecting pipe (1), and a ball valve ball (7) installed inside the first ball valve connecting pipe (1), characterized in that it also includes: A first connecting outer ring (2), the outer end of the first connecting pipe (1) of the ball valve is welded and fixed with the first connecting outer ring (2), and the outer end of the first connecting outer ring (2) is fitted with a second connecting outer ring (4), and threaded rods (5) are installed inside the first connecting outer ring (2) and the second connecting outer ring (4), and nuts (6) are provided on the outer surfaces of the threaded rods (5), a ball valve groove (8) is provided inside the ball valve bead (7), and the lower end of the first connecting pipe (1) of the ball valve is connected to a heat-insulating bottom plate (20); A connecting tube (16) is fixedly arranged at the middle of the upper end of the first connecting tube (1) of the ball valve, and a first protective plate (17) is arranged on the outer side of the connecting tube (16), the outer end of the first protective plate (17) is rotatably connected to the second protective plate (18), and the first protective plate (17) and the second protective plate (18) are both provided with insulation tubes (19) inside, a motor (21) is arranged at the upper end of the first protective plate (17), a side protective outer plate (33) is penetrated and connected inside the first protective plate (17), a connecting groove (35) is provided at the inner upper end of the second protective plate (18), and a T-shaped groove (34) is provided on the lower side of the connecting groove (35).

2. A hard-sealed ball valve with low-temperature protection function according to claim 1, characterized in that: The ball valve groove (8) further comprises a spacer column (9) arranged at the upper end of the ball valve groove (8), and a connecting groove (10) is provided inside the spacer column (9), a blocking block (12) is provided inside the connecting groove (10), and a spring (13) is installed on the outer surface of the blocking block (12), a supporting pressure rod (11) is provided at the upper end of the blocking block (12), and a handle rod (15) is provided at the upper end of the supporting pressure rod (11), and a connecting top cover (14) connected to the connecting tube (16) is provided on the outer side of the supporting pressure rod (11).

3. A hard-sealed ball valve with low-temperature protection function according to claim 2, characterized in that: The blocking block (12) is arranged at an equal angle on the outer surface of the lower end of the supporting pressure rod (11), and a groove structure matching the blocking block (12) is opened at an equal angle inside the connecting groove (10), and the supporting pressure rod (11) is relatively slidably connected to the spacer column (9) through a spring (13).

4. The hard-sealed ball valve with low-temperature protection function according to claim 1, characterized in that: The motor (21) further comprises a stabilizing support rod (22) arranged at the lower end of the motor (21), and a collar block (23) is installed on the outer surface of the stabilizing support rod (22), and the outer end of the collar block (23) is fixedly connected to a stabilizing rod (24), and the outer end of the collar block (23) is provided with a fixing rod (25).

5. The hard-sealed ball valve with low-temperature protection function according to claim 4, characterized in that: The stabilizing support rod (22) is connected to the collar block (23) in a threaded manner, and the collar block (23) is connected to the second protection plate (18) in a sliding manner via the stabilizing rod (24).

6. The hard-sealed ball valve with low-temperature protection function according to claim 4, characterized in that: The collar block (23) is fixedly connected to the side protection outer plate (33) via a fixing rod (25), and the side protection outer plate (33) is connected to the first protection plate (17) in a sliding manner.

7. The hard-sealed ball valve with low-temperature protection function according to claim 1, characterized in that: The stabilizing support rod (22) further comprises a protective block (26) arranged at the lower end of the stabilizing support rod (22), and a mounting disc (27) fixedly connected to the stabilizing support rod (22) is arranged inside the protective block (26), a limiting disc (28) is arranged at the outer end of the mounting disc (27), and a first support rod (29) is installed at the outer end of the limiting disc (28), a second support rod (30) is arranged inside the first support rod (29), and a stabilizing outer block (31) is installed at the outer end of the second support rod (30), and a T-shaped outer plate (32) is arranged at the outer end of the stabilizing outer block (31).

8. The hard-sealed ball valve with low-temperature protection function according to claim 7, characterized in that: The mounting disc (27) and the limiting disc (28) are connected in a meshing manner, and the limiting disc (28) is fixedly connected to the first support rod (29).

9. The hard-sealed ball valve with low-temperature protection function according to claim 7, characterized in that: The first support rod (29) and the second support rod (30) are connected in a threaded manner, and the thread directions of the front and rear ends of the second support rod (30) are opposite.

10. The hard-sealed ball valve with low-temperature protection function according to claim 7, characterized in that: The stabilizing outer block (31) is connected to the T-shaped outer plate (32) in a rotating manner, and the T-shaped outer plate (32) is connected to the second protective plate (18) in a sliding manner.

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