Anti-freezing ball valve for low-temperature environment

Abstract

The anti-freezing ball valve used in the low-temperature environment comprises an installation bottom plate, a heat preservation box and a ball valve body, heating blocks are fixedly installed at the front end and the rear end of the ball valve body respectively, heating cavities are formed in the heating blocks, first electric heating pipes are fixedly installed on the inner side walls of the heating cavities, and second electric heating pipes are fixedly installed on the inner side walls of the first electric heating pipes. The side end of the first electric heating pipe is fixedly connected with a power interface, and a control panel used for controlling the first electric heating pipe is fixedly installed at the side end of the ball valve body. A water inlet part at the front end of the ball valve body fixedly communicates with a preheating pipe through a connecting flange, an electric heater is fixedly installed on the front side of the lower end of the heat preservation box, a second electric heating pipe is fixedly installed on the inner side of the electric heater, a protective cover is fixedly installed on the outer side of the heat preservation box, and a driving motor is fixedly installed on the inner side wall of the protective cover. According to the utility model, cold resistance and freezing prevention of the ball valve main body are realized, and meanwhile, the preheating efficiency of a medium discharged into the ball valve main body is further improved.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, specifically to an antifreeze ball valve for low-temperature environments. Background Technology

[0002] The opening and closing element of a ball valve is a ball with a circular through-hole. The ball is driven by the valve stem and rotates around the axis of the ball valve. When the ball rotates to a specific position (usually ninety degrees), the channel on it will align with or offset from the channel of the valve body, thereby realizing the opening and closing of the fluid.

[0003] The main functions of ball valves in piping systems include: Cutting off the medium: By rotating the ball, the fluid in the pipeline can be quickly cut off, achieving media isolation and cutoff. Distributing the medium: Ball valves, such as three-way ball valves, can flexibly distribute the medium, diverting it from one pipeline to multiple different pipelines. Changing the direction of medium flow: By adjusting the rotation angle of the ball, the flow direction of the medium can be changed to meet different process requirements. Ball valves can be classified according to different criteria, such as by structure (floating ball valves and fixed ball valves); by pressure (high-pressure ball valves, medium-pressure ball valves, and low-pressure ball valves); and by flow path type (full-bore ball valves and reduced-bore ball valves). Different types of ball valves have different characteristics and applicable ranges.

[0004] However, in practical applications, ordinary ball valves are insufficient to withstand the extreme cold in industries operating in low-temperature environments, such as polar research equipment and cryogenic liquid storage and transportation systems. Frequent valve freezing issues lead to pipeline blockages and fluid transport interruptions, not only delaying production but also potentially causing safety hazards. Summary of the Invention

[0005] The purpose of this invention is to provide an anti-freezing ball valve for cryogenic environments, addressing the issues raised in the background section regarding the inadequacy of ordinary ball valves to withstand extreme cold in industries operating in cryogenic environments, such as polar research equipment and cryogenic liquid storage and transportation systems. Frequent valve freezing problems cause pipeline blockages and fluid transport interruptions, not only delaying production but also potentially posing safety hazards.

[0006] To achieve the above objectives, this utility model provides the following technical solution: including a mounting base plate, an insulation box, and a ball valve body. Heating blocks are fixedly installed at the front and rear ends of the ball valve body, and a heating chamber is opened inside the heating block. A first electric heating tube is fixedly installed on the inner side wall of the heating chamber. A power interface is fixedly connected to the side end of the first electric heating tube. A control panel for controlling the first electric heating tube is fixedly installed on the side end of the ball valve body.

[0007] The ball valve body has a preheating pipe fixedly connected to the front inlet via a connecting flange. An electric heater is fixedly installed on the front side of the lower end of the insulation box. A second electric heating tube is fixedly installed inside the electric heater. A protective cover is fixedly installed on the outer side of the insulation box. A drive motor is fixedly installed on the inner wall of the protective cover. A first synchronous pulley is fixedly installed on the outer curved surface of the inner drive shaft of the drive motor. A second synchronous pulley is connected to the outer end of the first synchronous pulley via a synchronous belt. A stirring shaft is fixedly installed in the middle of the second synchronous pulley. A stirring paddle is fixedly installed on the outer curved surface of the middle of the stirring shaft. An inlet for discharging heat transfer fluid into the insulation box is fixedly connected to the upper end of the insulation box.

[0008] Preferably, the insulation box and the ball valve body are fixedly installed on the upper end of the mounting base plate. The mounting base plate has four through holes at its four corners, which are symmetrically distributed at the four corners of the mounting base plate.

[0009] Preferably, there are two heating blocks, which are symmetrically distributed at the front and rear ends of the ball valve body, and a temperature sensor for monitoring the internal temperature of the heating chamber is fixedly installed inside the heating chamber.

[0010] Preferably, the power interface is fixedly installed through the side of the ball valve body.

[0011] Preferably, the preheating pipe is fixedly installed through the middle of the insulation box, and a temperature sensor for monitoring the internal temperature of the insulation box is fixedly installed inside the insulation box.

[0012] Preferably, the second heating element extends inward to the bottom of the insulation box, and the inner drive shaft of the drive motor is rotatably connected to the outer wall of the insulation box via a rotating shaft.

[0013] Preferably, the stirring shafts are rotatably connected to the middle of the upper and lower ends of the heat preservation box through rotating shafts, and there are several stirring paddles, which are symmetrically distributed in sequence with respect to the outer curved surface of the middle of the stirring shafts. The upper end of the liquid inlet is interference-fitted with a sealing plug.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] When the first heating element is turned on, it works with the heating block to heat the outer end of the ball valve body, effectively preventing the ball valve body from freezing in low-temperature environments. This ensures that the ball valve body can still open and close normally under extreme low-temperature conditions. Simultaneously, the heat transfer fluid is discharged into the insulation box through the inlet. When the heat transfer fluid is discharged into the insulation box, the second heating element is turned on by the electric heater. When the second heating element is turned on, it heats the heat transfer fluid inside the insulation box. When the heat transfer fluid inside the insulation box is heated, it heats the preheating tube. When the preheating tube is heated, it preheats the medium discharged into the ball valve body. By preheating the medium, the internal temperature of the ball valve body is increased, preventing the medium from freezing inside the ball valve body. This achieves the anti-freezing function of the ball valve body, making the ball valve body suitable for various low-temperature working conditions. Whether it is ultra-low temperature liquid gas transportation or outdoor pipeline systems in cold regions, it can exhibit good working performance.

[0016] This invention also enables the activation of a drive motor when the heat transfer fluid is heated. When the drive motor is activated, it drives the first synchronous wheel to rotate, which in turn drives the second synchronous wheel to rotate. The second synchronous wheel then drives the stirring shaft, which in turn drives the stirring paddle. The stirring paddle's rotation stirs and mixes the heat transfer fluid inside the insulation box, improving its heating efficiency. This achieves both cold-resistant and freeze-proof properties for the ball valve body and further enhances the preheating efficiency of the medium discharged into the ball valve body. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an antifreeze ball valve for low-temperature environments according to this utility model. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the overall structure of an antifreeze ball valve for low-temperature environments according to this utility model. Figure 2 ;

[0019] Figure 3 This is a cross-sectional schematic diagram of the overall structure of an antifreeze ball valve for low-temperature environments according to this utility model.

[0020] In the diagram: 1. Mounting base plate; 2. Insulation box; 3. Ball valve body; 4. Heating block; 5. Heating chamber; 6. First electric heating element; 7. Power interface; 8. Control panel; 9. Preheating tube; 10. Electric heater; 11. Protective cover; 12. Drive motor; 13. First synchronous pulley; 14. Second synchronous pulley; 15. Stirring shaft; 16. Stirring paddle; 17. Liquid inlet; 18. Second electric heating element. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-3 This utility model provides a technical solution for an antifreeze ball valve for low-temperature environments: it includes a mounting base plate 1, an insulation box 2, and a ball valve body 3. The insulation box 2 and the ball valve body 3 are respectively fixedly installed on the upper end of the mounting base plate 1. The mounting base plate 1 has four through holes at its four corners, which are symmetrically distributed at the four corners of the mounting base plate 1, so that the mounting base plate 1 can be installed and fixed by mounting bolts through the mounting holes.

[0023] Heating blocks 4 are fixedly installed at the front and rear ends of the ball valve body 3, and there are two heating blocks 4, which are symmetrically distributed at the front and rear ends of the ball valve body 3. A heating chamber 5 is opened inside the heating block 4, and a temperature sensor for monitoring the internal temperature of the heating chamber 5 is fixedly installed inside the heating chamber 5. A first electric heating tube 6 is fixedly installed on the inner side wall of the heating chamber 5. A power interface 7 is fixedly connected to the side end of the first electric heating tube 6, and the power interface 7 is fixedly installed through the side end of the ball valve body 3, so that the first electric heating tube 6 is provided with working power through the power interface 7. A control panel 8 for controlling the first electric heating tube 6 is fixedly installed on the side end of the ball valve body 3.

[0024] The inlet portion of the ball valve body 3 is fixedly connected to a preheating pipe 9 via a connecting flange, and the preheating pipe 9 is fixedly installed through and in the middle of the insulation box 2. An electric heater 10 is fixedly installed on the lower front side of the insulation box 2, and a temperature sensor for monitoring the internal temperature of the insulation box 2 is fixedly installed inside the insulation box 2. A second electric heating tube 18 is fixedly installed inside the electric heater 10, and the second electric heating tube 18 extends inward to the bottom of the insulation box 2. A protective cover 11 is fixedly installed on the outside of the insulation box 2, and a drive motor 12 is fixedly installed on the inner wall of the protective cover 11. The inner drive shaft of the drive motor 12 is rotatably connected to the outer wall of the insulation box 2 via a rotating shaft. A first synchronous pulley 13 is fixedly installed on the outer curved surface of the inner drive shaft of the motor 12. The outer end of the first synchronous pulley 13 is connected to a second synchronous pulley 14 via a synchronous belt. A stirring shaft 15 is fixedly installed in the middle of the second synchronous pulley 14. The stirring shaft 15 is rotatably connected to the middle of the upper and lower ends of the heat preservation box 2 via a rotating shaft. A stirring paddle 16 is fixedly installed on the outer curved surface of the middle of the stirring shaft 15. There are several stirring paddles 16, which are symmetrically distributed in sequence with respect to the outer curved surface of the middle of the stirring shaft 15. An inlet 17 for discharging heat transfer liquid into the heat preservation box 2 is fixedly connected to the upper end of the heat preservation box 2. A sealing plug is interference-fitted to the upper end of the inlet 17.

[0025] Working principle: In use, this utility model provides power to the first heating element 6 through the power interface 7. When the first heating element 6 is powered, it is turned on by the control panel 8. When the first heating element 6 is turned on, it works with the heating block to heat the outer end of the ball valve body 3, effectively preventing the ball valve body 3 from freezing in low-temperature environments and ensuring that the ball valve body 3 can still open and close normally under extreme low-temperature conditions. At the same time, the heat transfer fluid is discharged into the heat preservation box 2 through the liquid inlet 17. When the heat transfer fluid is discharged into the heat preservation box 2, the second heating element 18 is turned on by the electric heater 10. When the heating element 18 is turned on, it heats the heat-conducting liquid inside the insulation box 2. When the heat-conducting liquid inside the insulation box 2 is heated, it heats the preheating tube 9. When the preheating tube 9 is heated, it preheats the medium discharged into the ball valve body 3. By preheating the medium, the temperature inside the ball valve body 3 is increased, preventing the medium from freezing inside the ball valve body 3. This achieves the anti-freezing function of the ball valve body 3, making the ball valve body 3 suitable for various low-temperature working conditions. Whether it is ultra-low temperature liquid gas transportation or outdoor pipeline systems in cold regions, it can show good working performance.

[0026] Simultaneously, when the heat transfer fluid is heated, the drive motor 12 is activated by control. When the drive motor 12 is activated, it drives the first synchronous wheel 13 to rotate. When the first synchronous wheel 13 rotates, it drives the second synchronous wheel 14 to rotate. When the second synchronous wheel 14 rotates, it drives the stirring shaft 15 to rotate. When the stirring shaft 15 rotates, it drives the stirring paddle 16 to rotate. When the stirring paddle 16 rotates, it stirs and mixes the heat transfer fluid inside the insulation box 2. When the heat transfer fluid is stirred and mixed, the heating efficiency of the heat transfer fluid is improved. Thus, while the ball valve body 3 is protected from cold and freezing, the preheating efficiency of the medium discharged into the ball valve body 3 is further improved.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-temperature environment antifreeze ball valve, characterized in that: The device includes a mounting base plate (1), an insulation box (2), and a ball valve body (3). Heating blocks (4) are fixedly installed at the front and rear ends of the ball valve body (3). A heating chamber (5) is opened inside the heating block (4). A first electric heating tube (6) is fixedly installed on the inner side wall of the heating chamber (5). A power interface (7) is fixedly connected to the side end of the first electric heating tube (6). A control panel (8) for controlling the first electric heating tube (6) is fixedly installed on the side end of the ball valve body (3). The ball valve body (3) has a preheating pipe (9) fixedly connected to the front water inlet via a connecting flange. An electric heater (10) is fixedly installed on the front side of the lower end of the insulation box (2). A second electric heating tube (18) is fixedly installed inside the electric heater (10). A protective cover (11) is fixedly installed on the outside of the insulation box (2). A drive motor (12) is fixedly installed on the inner wall of the protective cover (11). A first synchronous pulley (13) is fixedly installed on the outer curved surface of the inner drive shaft of the drive motor (12). A second synchronous pulley (14) is connected to the outer end of the first synchronous pulley (13) via a synchronous belt. A stirring shaft (15) is fixedly installed in the middle of the second synchronous pulley (14). A stirring paddle (16) is fixedly installed on the outer curved surface of the middle part of the stirring shaft (15). An inlet (17) for discharging heat transfer liquid into the interior of the insulation box (2) is fixedly connected to the upper end of the insulation box (2).

2. The antifreeze ball valve for low-temperature environments according to claim 1, characterized in that: The heat preservation box (2) and the ball valve body (3) are respectively fixedly installed on the upper end of the mounting base plate (1). The mounting base plate (1) has four mounting holes through the four corners, which are symmetrically distributed at the four corners of the mounting base plate (1).

3. The antifreeze ball valve for low-temperature environments according to claim 2, characterized in that: There are two heating blocks (4), which are symmetrically distributed at the front and rear ends of the ball valve body (3). A temperature sensor for monitoring the internal temperature of the heating chamber (5) is fixedly installed inside the heating chamber (5).

4. The antifreeze ball valve for low-temperature environments according to claim 3, characterized in that: The power interface (7) is fixedly installed through the ball valve body (3) on the side.

5. The antifreeze ball valve for low-temperature environments according to claim 4, characterized in that: The preheating pipe (9) is fixedly installed through the middle of the heat preservation box (2), and a temperature sensor for monitoring the internal temperature of the heat preservation box (2) is fixedly installed inside the heat preservation box (2).

6. The antifreeze ball valve for low-temperature environments according to claim 5, characterized in that: The second heating element (18) extends inward to the bottom of the heat preservation box (2), and the inner drive shaft of the drive motor (12) is rotatably connected to the outer wall of the heat preservation box (2) via a rotating shaft.

7. The antifreeze ball valve for low-temperature environments according to claim 6, characterized in that: The stirring shaft (15) is rotatably connected to the middle of the upper and lower ends of the heat preservation box (2) through a rotating shaft. There are several stirring paddles (16), which are symmetrically distributed in sequence with respect to the outer curved surface of the middle part of the stirring shaft (15). The upper end of the liquid inlet (17) is press-fitted with a sealing plug.

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