High-temperature lead-bismuth liquid alloy regulating valve

Abstract

The utility model relates to the technical field of valves, and discloses a high-temperature lead bismuth liquid alloy regulating valve which comprises a valve body and a temperature control assembly arranged on the peripheral side of the valve body, the temperature control assembly comprises a heat insulation shell, a heat exchange channel, a temperature monitoring structure and a controller, and the heat insulation shell is arranged on the peripheral side of the valve body; a temperature control cavity of a hollow structure is formed between the opposite faces of the heat insulation shell and the valve body. The heat exchange channel is arranged in the temperature control cavity, and the input end and the output end of the heat exchange channel penetrate through the peripheral side of the heat insulation shell to be connected to the temperature compensation unit. The temperature monitoring structure is arranged in the temperature control chamber; the controller is connected to the temperature monitoring structure and the temperature compensation unit. The valve body can be controlled to be in a relatively stable temperature range under any operation working condition by adjusting the temperature in the temperature control cavity, high-temperature creep loss caused by the valve body in different use environments and operation working conditions is avoided, and therefore the working efficiency of the conveying system is effectively improved on the premise that the service life of the valve body is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a regulating valve for high-temperature lead-bismuth liquid alloy. Background Art

[0002] High-temperature lead-bismuth liquid alloy has the characteristics of slow flow, high density, strong scouring property, toxicity and harmfulness, etc. When it flows in the conveying system, the scouring damage rate of the valve on the pipeline changes with the conveying temperature of the medium. Especially when the opening degree of the valve reaches the optimal operating condition, the heat-absorbing density of the valve body is the largest, resulting in easy creep loss of the valve body under high-temperature conditions, affecting the service life of the valve; and when the temperature of this type of medium decreases, it is easy to condense into a solid, so there is no allowance for medium residue inside the valve. Usually, only a regulating valve is arranged on the pipeline to change the flow rate and pressure.

[0003] However, the existing regulating valves cannot meet the conveying requirements of high-temperature lead-bismuth liquid alloy, that is, they cannot ensure that the valve body is within a relatively stable temperature range under different use environments and operating conditions; therefore, in order to prevent high-temperature creep loss of the valve body, the opening degree of the valve body will not be adjusted to the optimal operating condition for a long time, which seriously affects the working efficiency of the conveying system. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a regulating valve for high-temperature lead-bismuth liquid alloy to ensure that the valve body is within a relatively stable temperature range under different use environments and operating conditions, so as to improve the working efficiency of the conveying system on the premise of ensuring the service life of the valve body.

[0005] A regulating valve for high-temperature lead-bismuth liquid alloy, the regulating valve includes a valve body, as well as a valve flap arranged at the opening and closing end of the valve body and a valve rod for driving the valve flap to move. A high-temperature resistant sealing structure is arranged between the valve rod and the valve body. A temperature control assembly is arranged on the outer periphery of the valve body. The temperature control assembly includes:

[0006] A heat insulation shell, which is arranged on the outer peripheral side of the valve body, and a temperature control chamber with a hollow structure is formed between the opposite surfaces of the heat insulation shell and the valve body;

[0007] A heat exchange channel, which is arranged in the temperature control chamber, and the input end and the output end of the heat exchange channel respectively penetrate the outer peripheral side of the heat insulation shell and are connected to a temperature compensation unit;

[0008] A temperature monitoring structure, which is arranged in the temperature control chamber;

[0009] A controller, which is connected to the temperature monitoring structure and the temperature compensation unit.

[0010] Optionally, the heat exchange channel includes a heat source pipeline and / or a cold source pipeline.

[0011] Optionally, the heat source pipeline is provided with a hollow structure in the heat insulation housing.

[0012] Optionally, the cold source pipeline is provided with several sections, and is uniformly arranged on the outer peripheral side of the valve body along the axial direction of the valve stem in the temperature control chamber.

[0013] Optionally, the cold source pipeline includes a heat exchange section and a connection section;

[0014] The heat exchange section is arranged in the temperature control chamber, and connection parts are respectively arranged at both ends of the heat exchange section through the heat insulation housing.

[0015] The connection section communicates the connection parts of two or more adjacent heat exchange sections.

[0016] Optionally, the heat exchange section is arranged as a corrugated pipe, and the corrugated pipe is detachably installed in the temperature control chamber.

[0017] Optionally, the temperature compensation unit includes a heat source and / or a cold source, wherein;

[0018] The output end of the heat source is connected to the heat input end of the heat source pipeline, and the input end of the heat source is connected to the cold output end of the heat source pipeline;

[0019] The output end of the cold source is connected to the cold input end of the cold source pipeline, and the input end of the cold source is connected to the heat output end of the cold source pipeline.

[0020] Optionally, the temperature monitoring structure at least includes a temperature sensor;

[0021] The temperature measuring probe of the temperature sensor is arranged in the temperature control chamber.

[0022] Optionally, the heat insulation housing is arranged as an integrally cast ceramic structure.

[0023] The beneficial effects that the present utility model can produce include:

[0024] The high-temperature lead-bismuth liquid alloy regulating valve provided by the present utility model includes a temperature control assembly arranged on the outer periphery of the valve body. The temperature control assembly includes a heat insulation housing, a heat exchange channel, a temperature compensation unit, a temperature monitoring structure and a controller, so that the controller controls the temperature compensation unit to send corresponding heat exchange media into the heat exchange channel according to the actual temperature value monitored by the temperature monitoring structure, to adjust the temperature inside the temperature control chamber, and further control the valve body to be within a relatively stable temperature range under any operating conditions, avoiding high-temperature creep loss caused to the valve body under different use environments and operating conditions, and thus effectively improving the working efficiency of the conveying system on the premise of ensuring the service life of the valve body. Description of the Drawings

[0025] Figure 1 Structural schematic diagram of the regulating valve of the present utility model;

[0026] Figure 2 In the present utility model Figure 1 Structural schematic diagram of the temperature control component;

[0027] Figure 3 Schematic diagram of the control principle framework of the regulating valve in the present utility model;

[0028] In the figure: 1, valve body; 2, valve flap; 3, valve stem; 4, temperature control component; 41, heat insulation housing; 42, temperature control chamber; 43, heat source pipeline; 44, cold source pipeline; 441, heat exchange section; 442, connection section; 45, temperature compensation unit; 46, temperature monitoring structure; 47, controller. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] Please refer to Figure 1 As shown, the present utility model provides a high-temperature lead-bismuth liquid alloy regulating valve. The regulating valve includes a valve body 1, a valve flap 2 provided at the opening and closing end of the valve body 1, and a valve stem 3 for driving the movement of the valve flap 2. A high-temperature resistant sealing structure is provided between the valve stem 3 and the valve body 1. A temperature control component 4 is provided on the outer periphery of the valve body 1. The temperature control component 4 includes a heat insulation housing 41, a heat exchange channel, a temperature compensation unit 45, a temperature monitoring structure 46, and a controller 47 (using a single-chip microcomputer); wherein, the heat insulation housing 41 is provided on the outer peripheral side of the valve body 1, and a hollow-structured temperature control chamber 42 is formed between the opposite surfaces of the heat insulation housing 41 and the valve body 1; the heat exchange channel is provided in the temperature control chamber 42, and the input end and the output end of the heat exchange channel respectively penetrate through the outer peripheral side of the heat insulation housing 41 and are connected to the temperature compensation unit 45; the temperature monitoring structure 46 is provided in the temperature control chamber 42 for real-time monitoring of the temperature of the valve body 1 under any operating conditions; such as Figure 3As shown, the controller 47 is connected to the temperature monitoring structure 46 and the temperature compensation unit 45. The controller 47 can control the temperature compensation unit 45 to send a corresponding heat exchange medium into the heat exchange channel according to the actual temperature value monitored by the temperature monitoring structure 46, so as to adjust the temperature inside the temperature control chamber 42, and further control the valve body 1 to be within a relatively stable temperature range under any operating conditions, avoiding high-temperature creep losses caused to the valve body 1 under different use environments and operating conditions, thereby effectively improving the working efficiency of the conveying system on the premise of ensuring the service life of the valve body 1.

[0031] In the above, as Figure 2 shown, the heat exchange channel includes two types: a heat source pipeline 43 and / or a cold source pipeline 44. Specifically, the temperature compensation unit 45 includes a heat source and / or a cold source. The output end of the heat source is connected to the hot input end of the heat source pipeline 43, and the input end of the heat source is connected to the cold output end of the heat source pipeline 43; the output end of the cold source is connected to the cold input end of the cold source pipeline 44, and the input end of the cold source is connected to the hot output end of the cold source pipeline 44. In this embodiment, as Figure 2 shown, by designing a double-layer pipeline, it is convenient for the controller 47 to control the temperature compensation unit 45 to select and connect at least one of the heat source pipeline 43 or the cold source pipeline 44 to adjust the temperature of the temperature control chamber 42; at the same time, when the change range of the flow rate of the conveying medium adjusted by the regulating valve is too frequent, it will increase the temperature difference change range of the valve body 1 during the operation stage. At this time, it can be controlled that the temperature compensation unit 45 selects to synchronously connect the heat source pipeline 43 and the cold source pipeline 44 to accurately compensate the temperature of the temperature control chamber 42. Therefore, compared with the adjustment method of switching the heat source and the cold source of the single-layer pipeline, the temperature compensation accuracy can be improved. It should be particularly noted that the temperature compensation unit 45 is equipped with corresponding medium delivery pumps, electronic control valves and complete pipeline facilities for both the heat source and the cold source; in addition, a temperature compensator, such as an electric heater, is additionally provided for the heat source to timely compensate the lost temperature during the heat exchange process of the heat source; a refrigeration structure, such as a cooling tower, is equipped for the cold source. The medium output from the cold source pipeline 44 is first cooled by the cooling tower and then returned to the cold source for recycling, comprehensively ensuring the efficient operation of the temperature compensation unit 45.

[0032] In the above, the heat insulation housing 41 is set as an integrally cast ceramic structure, and the heat source pipeline 43 is hollowed out and arranged in the heat insulation housing 41. For example, a honeycomb-structured hollow cavity is formed inside the heat insulation housing 41 during the casting process, and air holes penetrating the outer periphery of the heat insulation housing 41 are respectively reserved at both ends of the honeycomb-structured hollow cavity to serve as the hot input end and the cold output end of the heat source pipeline 43, which not only ensures the heat insulation performance but also optimizes the space layout. At the same time, when the ambient temperature of the valve body 1 is lower than the temperature of the conveying medium inside it, a hot medium can be introduced into the heat source pipeline 43 to further block the temperature loss of the conveying medium inside the valve body 1.

[0033] In the above, the cold source pipeline 44 is provided with several sections, and is uniformly arranged on the outer peripheral side of the valve body 1 along the axial direction of the valve stem 3 in the temperature control chamber 42 to achieve uniform heat exchange, effectively avoiding local high-temperature creep loss of the valve body 1 due to uneven heating during the heat exchange process. Specifically, the cold source pipeline 44 includes a heat exchange section 441 and a connection section 442; the heat exchange section 441 is arranged in the temperature control chamber 42, and connection parts are respectively provided at both ends thereof through the heat insulation housing 41, and the connection section 442 is responsible for connecting the connection parts of two or more adjacent heat exchange sections 441 to each other. This structural design enables several sections of the cold source pipeline 44 to be connected to each other in a serpentine structure, allowing the cold source to flow through each section of the cold source pipeline 44 in sequence to achieve gradual and sufficient heat exchange; or the liquid inlet end and the liquid outlet end of several sections of the cold source pipeline 44 can be respectively connected centrally, prompting the cold source to rush into each section of the cold source pipeline 44 synchronously to achieve the effect of rapid heat exchange.

[0034] In this embodiment, as Figure 2 shown, in order to fully exploit the maximum efficiency of the cold source during the heat exchange process, several sections of the cold source pipeline 44 are specifically connected in a serpentine structure, thereby effectively extending the effective heat exchange duration of the cold source in the temperature control chamber 42; at the same time, in order to further improve the uniformity of heating of the valve body 1, the liquid inlet end of the cold source is arranged on the side close to the discharge port of the valve body 1, so that the cold source and the high-temperature medium inside the valve body 1 flow in the opposite direction in the initial stage, optimizing the heat exchange effect.

[0035] In the above, as Figure 2 shown, the heat exchange section 441 is set as a corrugated pipe, and this structure can effectively prevent the pipeline from breaking due to heat deformation, greatly improving the durability of the pipeline. And the corrugated pipe is installed in the temperature control chamber 42 in a detachable manner, providing great convenience for subsequent replacement and maintenance work.

[0036] Furthermore, the temperature monitoring structure 46 at least includes a temperature sensor; the temperature measuring probe of the temperature sensor is arranged in the temperature control chamber 42; in addition, the temperature monitoring structure 46 is equipped with a power supply and a digital display operation screen for the temperature sensor. With the help of the digital display operation screen, not only can the actual temperature value monitored by the temperature sensor be intuitively displayed, but also the monitoring range of the temperature sensor can be conveniently set. Once the temperature sensor captures that the actual temperature value in the temperature control chamber 42 exceeds the preset monitoring range, the controller 47 will immediately activate the temperature compensation unit 45 to achieve intelligent temperature control, which can be applicable to different usage environments and operating conditions.

Claims

1. A high-temperature lead-bismuth liquid alloy regulating valve, the regulating valve comprising a valve body (1), a valve flap (2) arranged at an opening and closing end of the valve body (1), and a valve stem (3) for driving the valve flap (2) to move, a high-temperature resistant sealing structure being arranged between the valve stem (3) and the valve body (1), and characterized in that: A temperature control component (4) is arranged on the outer periphery of the valve body (1), and the temperature control component (4) comprises: A heat-insulating shell (41) is disposed on the outer peripheral side of the valve body (1), and forms a temperature-control chamber (42) with a hollow structure between the opposing surfaces of the heat-insulating shell (41) and the valve body (1); A heat exchange channel is provided in the temperature control chamber (42), and an input end and an output end of the heat exchange channel respectively penetrate the outer peripheral side of the heat insulation shell (41) and are connected to the temperature compensation unit (45); A temperature monitoring structure (46) is disposed in the temperature control chamber (42); A controller (47) is connected to the temperature monitoring structure (46) and the temperature compensation unit (45).

2. The high temperature lead-bismuth liquid alloy regulating valve according to claim 1, characterized in that: The heat exchange channel comprises a heat source pipeline (43) and / or a cold source pipeline (44).

3. The high temperature lead-bismuth liquid alloy regulating valve according to claim 2, characterized in that: The heat source pipeline (43) is hollowed out and arranged in the heat-insulating shell (41).

4. The high temperature lead-bismuth liquid alloy regulating valve according to claim 2, characterized in that: The cold source pipeline (44) is provided with a plurality of sections and is evenly arranged on the outer peripheral side of the valve body (1) along the axial direction of the valve stem (3) in the temperature control chamber (42).

5. The high temperature lead-bismuth liquid alloy regulating valve according to claim 4, characterized in that: The cold source pipeline (44) comprises a heat exchange section (441) and a connecting section (442); The heat exchange section (441) is arranged in the temperature control chamber (42), and both ends of the heat exchange section (441) respectively penetrate the heat insulation shell (41) and are provided with connection parts; The connecting section (442) connects the connecting parts of two or more adjacent heat exchange sections (441).

6. The high temperature lead-bismuth liquid alloy regulating valve according to claim 5, characterized in that: The heat exchange section (441) is configured as a bellows, and the bellows can be detachably installed in the temperature control chamber (42).

7. The high temperature lead-bismuth liquid alloy regulating valve according to claim 2, characterized in that: The temperature compensation unit (45) comprises a heat source and / or a cold source, wherein; The output end of the heat source is connected to the hot input end of the heat source pipeline (43), and the input end of the heat source is connected to the cold output end of the heat source pipeline (43); The output end of the cold source is connected to the cold input end of the cold source pipeline (44), and the input end of the cold source is connected to the hot output end of the cold source pipeline (44).

8. The high temperature lead-bismuth liquid alloy regulating valve according to claim 1, characterized in that: The temperature monitoring structure (46) comprises at least a temperature sensor; The temperature measuring probe of the temperature sensor is arranged in the temperature control chamber (42).

9. The high temperature lead-bismuth liquid alloy regulating valve according to claim 1, characterized in that: The heat-insulating housing (41) is configured as an integrally cast ceramic structure.

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