Air separation low-temperature liquid flow guide device

Abstract

The invention discloses an air separation low-temperature liquid flow guiding device which comprises a valve body, flow guiding pipes are arranged at the two ends of the valve body in a matched mode, the valve body and the flow guiding pipes are connected in a sealed mode through flange structures, a first channel allowing low-temperature liquid to flow through is formed in the valve body, and a flow adjusting assembly is arranged on the valve body. The flow adjusting assembly is used for adjusting and controlling the flowing state of low-temperature liquid in the first channel, and a second channel adjacent to the first channel is further formed in the valve body. The second channel is formed in the valve body, warm water is connected into a pipeline connector at an opening of the second channel to serve as a defrosting medium, a second threaded rod can be driven to axially move in a second internal threaded block by rotating an adjusting knob, a second piston is pushed to move in the second channel, opening and closing of the defrosting channel and flow speed adjustment of the warm water are achieved, and efficient defrosting of the valve body is achieved; and long-term stable operation of the device under a low-temperature diversion working condition is ensured.

Description

Technical Field

[0001] This invention relates to the field of cryogenic liquid transport technology, and more specifically, to a cryogenic liquid diversion device for air separation. Background Technology

[0002] In the cryogenic liquid transport system of air separation equipment, the flow guiding device, as the core component for precise flow of cryogenic liquid, is widely used in industrial gas preparation, cryogenic energy storage, metallurgy, chemical industry and other industrial fields. Its flow guiding stability, flow control accuracy and adaptability to cryogenic conditions directly determine the overall operating efficiency and safety of the air separation system. However, most cryogenic liquid flow guiding devices for air separation adopt a single flow guiding channel structure, which can only realize basic cryogenic liquid guidance and simple flow regulation functions. In actual cryogenic operation, due to the continuous flow of cryogenic liquid through the channel, frost and ice formation are prone to occur on the valve body and the inner wall of the flow guiding channel, and the frost layer will continue to thicken over time.

[0003] Traditional cryogenic liquid diversion devices for air separation typically lack a targeted defrosting structure. When cryogenic liquid is continuously diverted, frost easily forms on the valve body surface and adheres for a long time, which gradually affects the diversion performance of the device. In fact, the accumulation of frost may even lead to a decrease in the sealing performance of component connection parts. Some simple devices use external heating elements for defrosting, which not only has low heat transfer efficiency and is prone to uneven local heating, but also affects sealing performance and connection strength, causing both media loss and safety hazards. Therefore, there is an urgent need to develop a cryogenic liquid diversion device for air separation that combines flow regulation and efficient defrosting stability. Summary of the Invention

[0004] The purpose of this invention is to provide a cryogenic liquid diversion device for air separation, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cryogenic liquid diversion device for air separation, comprising a valve body: Both ends of the valve body are equipped with guide pipes, and the valve body and the guide pipes are sealed together by a flange structure. The valve body has a first channel for the flow of cryogenic liquid, and the valve body is equipped with a flow regulating component, which is used to regulate the flow state of cryogenic liquid in the first channel. The valve body also has a second channel adjacent to the first channel. The second channel is used to introduce the defrosting medium. The valve body is equipped with an on / off adjustment component adapted to the second channel. The on / off adjustment component is used to control the on / off state of the second channel and the flow state of the defrosting medium. The inner wall of the first channel is equipped with a heat-conducting component.

[0006] Preferably, the heat-conducting component includes a spiral heat-conducting plate, the inner wall of the first channel is provided with a spiral groove, the spiral heat-conducting plate is embedded in the inner wall of the spiral groove, one end of the spiral heat-conducting plate passes through the second channel and is fixedly connected to a limiting heat-conducting plate, and the outer wall of the limiting heat-conducting plate is fixedly connected to the inner wall of the second channel.

[0007] Preferably, the on / off adjustment assembly includes a second internally threaded block fixedly installed on the outside of the valve body, the second internally threaded block being internally threaded with a second threaded rod, one end of the second threaded rod extending to the outside of the valve body and equipped with an adjustment knob, and the other end extending into the second channel and fixedly connected with a second piston.

[0008] Preferably, the flange structure includes a first flange fixedly installed at both ends of the valve body, and a second flange fixedly installed at the end of the guide pipe, wherein the first flange and the second flange are fitted together and fixedly connected by bolts.

[0009] Preferably, the first flange has a first fixing hole on its edge, and the second flange has a second fixing hole on its edge that matches the first fixing hole. Bolts are inserted into the first fixing hole and the second fixing hole to fix the two flanges.

[0010] Preferably, the flow regulating component includes a first internally threaded block fixedly installed on the radially outer side of the valve body. The first internally threaded block is internally threaded with a first threaded rod. One end of the first threaded rod extends to the outer side of the valve body and is equipped with a rotating disk, while the other end extends into the first channel and is fixedly connected with a first piston.

[0011] Preferably, the first channel is a straight-through channel that runs through the valve body, with its two ends opening to the middle of the first flange at both ends of the valve body, and the cross-section of the first piston is adapted to the flow cross-section of the first channel.

[0012] Preferably, both ends of the second channel are connected to the radial outer side of the valve body, and each opening is fixedly installed with a pipe joint for connecting to an external medium conveying pipeline. The on / off adjustment component is located outside the valve body and between the two pipe joints.

[0013] Preferably, the cross-section of the second piston is adapted to the flow cross-section of the second channel, and the second channel is arranged parallel to the first channel.

[0014] Preferably, both the spiral heat-conducting plate and the limiting heat-conducting plate are made of copper.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention opens a second channel in the valve body, and the pipe joint at the opening is connected to warm water as the defrosting medium. Rotating the adjustment knob can drive the second threaded rod to move axially in the second internal thread block, and push the second piston to move in the second channel, thereby realizing the opening and closing of the defrosting channel and the adjustment of the warm water flow rate, achieving efficient defrosting of the valve body and ensuring the long-term stable operation of the device under low temperature flow conditions.

[0016] Furthermore, by embedding a spiral heat-conducting plate in the inner wall of the first channel, the present invention enables the spiral heat-conducting plate and the limiting heat-conducting plate to quickly transfer the heat of the warm water in the second channel, so that the heat is evenly covered on the inner wall of the first channel, further preventing the valve body from frosting due to the continuous flow of low-temperature liquid, and enabling the device to operate stably for a long time under low-temperature conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the air separation cryogenic liquid guiding device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the valve body in the air separation cryogenic liquid guiding device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the valve body in the air separation cryogenic liquid guiding device according to another perspective of an embodiment of the present invention; Figure 4 This is a cross-sectional structural diagram of the valve body in the air separation cryogenic liquid diversion device according to an embodiment of the present invention.

[0018] In the diagram: 101, valve body; 102, first flange; 103, first fixing hole; 104, guide pipe; 105, second flange; 106, second fixing hole; 107, first internal threaded block; 108, first threaded rod; 109, rotating disc; 110, first piston; 111, first channel; 112, second channel; 113, pipe joint; 114, second internal threaded block; 115, second threaded rod; 116, adjusting knob; 117, second piston; 118, spiral groove; 119, spiral heat-conducting plate; 120, limiting heat-conducting plate. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1 An embodiment of the present invention provides a cryogenic liquid diversion device for air separation, comprising: a valve body 101.

[0021] Among them, such as Figure 1 and Figure 4 As shown, both ends of the valve body 101 are equipped with guide pipes 104. The valve body 101 and the guide pipes 104 are sealed together by a flange structure. A first channel 111 for the flow of cryogenic liquid is opened in the valve body 101. A flow regulating component is installed on the valve body 101. The flow regulating component is used to regulate the flow state of cryogenic liquid in the first channel 111.

[0022] Reference Figure 1 -and Figure 2 The flange structure includes a first flange 102 fixedly installed at both ends of the valve body 101, and a second flange 105 fixedly installed at the end of the guide pipe 104. The first flange 102 and the second flange 105 are fitted together and fixedly connected by bolts. The edge of the first flange 102 is provided with a first fixing hole 103, and the edge of the second flange 105 is provided with a second fixing hole 106 that matches the first fixing hole 103. Bolts are inserted into the first fixing hole 103 and the second fixing hole 106 to fix the two together. The first flange 102 is used to connect the valve body 101 and the guide pipe 104, and the first fixing hole 103 provides an assembly point for the fixed connection of the two.

[0023] During assembly, one of the second flanges 105 of each guide pipe 104 is respectively fitted to one of the first flanges 102 on the valve body 101. Then, bolts are passed through the first fixing hole 103 on the first flange 102 and the second fixing hole 106 on the second flange 105 and tightened, thereby achieving a firm and sealed connection between the guide pipe 104 and the valve body 101. One of the second flanges 105 of the guide pipe 104 away from the valve body 101 is used to dock with the cryogenic liquid storage device to introduce cryogenic liquid.

[0024] Furthermore, such as Figure 2 and Figure 4 As shown, the flow regulating assembly includes a first internally threaded block 107 fixedly installed on the radially outer side of the valve body 101. The first internally threaded block 107 is internally threadedly connected to a first threaded rod 108. One end of the first threaded rod 108 extends to the outer side of the valve body 101 and is equipped with a rotating disk 109. The other end extends into the first channel 111 and is fixedly connected to a first piston 110. The first channel 111 provides a channel space for the flow of cryogenic liquid. The first channel 111 is opened inside the valve body 101, and the opening of the first channel 111 is connected to the middle of the first flange 102, so that the cryogenic liquid in the guide pipe 104 can smoothly enter the first channel 111 and flow. The rotating disk 109 facilitates the operator to apply force to drive the first threaded rod 108 to rotate. The first piston 110 is used to regulate the flow state of the first channel 111.

[0025] Reference Figure 4 The first channel 111 is a straight channel that runs through the valve body 101. Its two ends are connected to the middle of the first flange 102 at both ends of the valve body 101. The cross-section of the first piston 110 is adapted to the flow cross-section of the first channel 111. The design of the first channel 111 ensures that the cryogenic liquid can flow smoothly in a straight line after entering the first channel 111 from the guide pipe 104, reducing the resistance caused by the bend in the flow channel. The cross-section of the first piston 110 is precisely adapted to the flow cross-section of the first channel 111, thereby achieving sealing and flow regulation of the first channel 111.

[0026] In this embodiment, as Figure 3 and Figure 4 As shown, the valve body 101 also has a second channel 112 adjacent to the first channel 111. The second channel 112 is used to introduce the defrosting medium and to provide channel space for the flow of warm water. Its two openings are respectively connected to the radial outer side of the valve body 101 and the first internal thread block 107, which facilitates the entry and exit of warm water. The valve body 101 is equipped with an on / off adjustment component adapted to the second channel 112. The on / off adjustment component is used to control the on / off state of the second channel 112 and the flow state of the defrosting medium. The inner wall of the first channel 111 is equipped with a heat-conducting component.

[0027] The on / off adjustment assembly is located outside the valve body 101 and between two pipe joints 113. The on / off adjustment assembly includes a second internal threaded block 114 fixedly installed on the outside of the valve body 101. The second internal threaded block 114 is internally threaded with a second threaded rod 115. One end of the second threaded rod 115 extends to the outside of the valve body 101 and is equipped with an adjustment knob 116. The other end extends into the second channel 112 and is fixedly connected with a second piston 117. Both ends of the second channel 112 are connected to the radial outside of the valve body 101, and pipe joints 113 for connecting to external media conveying pipelines are fixedly installed at the openings.

[0028] When the on / off adjustment component is in use, the adjustment power is transmitted by rotating the second threaded rod 115 on the second internal threaded block 114 to push the second piston 117, which is fixedly connected to one end of the valve body 101, to reciprocate in the second channel 112, thereby adjusting the flow state of the second channel 112 and realizing the opening and closing of the warm water flow and the adjustment of the flow rate. Its adjustment knob 116 makes it easy for the operator to apply force to drive the second threaded rod 115 to rotate.

[0029] Specifically, the cross-section of the second piston 117 is adapted to the flow cross-section of the second channel 112, the second channel 112 is arranged parallel to the first channel 111, and the cross-section of the second piston 117 is adapted to the flow cross-section of the second channel 112, so as to realize the efficient on / off control and flow rate regulation of the second channel 112 by the second piston 117.

[0030] like Figure 4 As shown, the heat-conducting assembly includes a spiral heat-conducting plate 119. The inner wall of the first channel 111 is provided with a spiral groove 118. The spiral heat-conducting plate 119 is embedded in the inner wall of the spiral groove 118. One end of the spiral heat-conducting plate 119 passes through the second channel 112 and is fixedly connected to a limiting heat-conducting plate 120. The outer wall of the limiting heat-conducting plate 120 is fixedly connected to the inner wall of the second channel 112.

[0031] The spiral groove 118 provides an embedding mounting point for the spiral heat-conducting plate 119, ensuring that the spiral heat-conducting plate 119 fits tightly against the inner wall of the first channel 111, maximizing the heat-conducting contact area. This allows the heat from the warm water in the second channel 112 to be quickly and evenly transferred to the inner wall of the first channel 111, preventing frost formation on the inner wall of the first channel 111 due to poor local heat transfer. The spiral structure of the heat-conducting plate extends the heat transfer path, allowing heat to be evenly distributed on the inner wall of the first channel 111, while not affecting the smooth flow of the low-temperature liquid. 19 passes through the second channel 112 and connects to the limiting heat-conducting plate 120. The limiting heat-conducting plate 120 is fixed to the inner wall of the second channel 112. On the one hand, it can firmly fix the spiral heat-conducting plate 119 to prevent it from shifting or falling off due to the flow of low-temperature liquid or vibration of the device. On the other hand, the limiting heat-conducting plate 120 can increase the contact area with the warm water in the second channel 112, quickly absorb the heat of the warm water and transfer it to the spiral heat-conducting plate 119, improve the overall heat conduction efficiency, realize the efficient conduction and utilization of defrosting heat, and further eliminate the frosting phenomenon in the first channel 111.

[0032] It should be noted that both the spiral heat-conducting plate 119 and the limiting heat-conducting plate 120 are made of copper. Copper has excellent thermal conductivity, which is far superior to that of ordinary metals. By using copper to manufacture the spiral heat-conducting plate 119 and the limiting heat-conducting plate 120, the heat transfer efficiency is greatly improved, so that the heat of the warm water in the second channel 112 can be quickly absorbed by the limiting heat-conducting plate 120 and transferred to the spiral heat-conducting plate 119.

[0033] Based on the above technical solution, the working steps of this solution are summarized as follows: In this embodiment, the core of the device consists of a valve body 101, a guide pipe 104, a flow regulating component, a defrost on / off regulating component, and a heat conduction component. The valve body 101 and the guide pipe 104 are connected by a first flange 102, a second flange 105, and bolts. The cryogenic liquid is introduced into one of the guide pipes 104 from the storage device and flows through the first channel 111 inside the valve body 101. Rotating the rotating disk 109 can drive the first threaded rod 108 to move axially within the first internal thread block 107, thereby pushing the first piston 110 to reciprocate within the first channel 111. By changing the effective flow cross section of the first channel 111, the flow rate of the cryogenic liquid can be precisely controlled, and the first piston 110 can move to the end of the channel to complete the complete opening and closing of the guide channel.

[0034] The second channel 112, which is adjacent to the first channel 111 inside the valve body 101, is a defrosting channel. The pipe joint 113 at its opening is connected to warm water as the defrosting medium. Rotating the adjustment knob 116 can drive the second threaded rod 115 to move axially within the second internal thread block 114, pushing the second piston 117 to move within the second channel 112, thereby realizing the opening and closing of the defrosting channel and the adjustment of the warm water flow rate.

[0035] The spiral heat-conducting plate 119 on the inner wall of the first channel 111 is embedded in the spiral groove 118 and one end passes through the second channel 112 and is connected to the limiting heat-conducting plate 120. The copper spiral heat-conducting plate 119 and the limiting heat-conducting plate 120 can quickly transfer the heat of the warm water in the second channel 112, so that the heat evenly covers the inner wall of the first channel 111, preventing the valve body 101 from frosting due to the continuous flow of low temperature liquid, and ensuring the stable operation of the device under low temperature conditions.

[0036] In summary, this air separation cryogenic liquid diversion device, by setting a second channel 112 adjacent to the first channel 111 inside the valve body 101, and in conjunction with the linkage structure of the pipe joint 113, the second internal threaded block 114, the second threaded rod 115, the adjusting knob 116, and the second piston 117, can connect warm water through the pipe joint 113 and flexibly control the opening and closing of the warm water channel and the flow rate of the warm water, thereby achieving efficient defrosting of the valve body 101 and ensuring long-term stable operation of the device under cryogenic diversion conditions. In addition, by embedding a spiral heat-conducting plate 119 on the inner wall of the first channel 111, the spiral heat-conducting plate 119 and the limiting heat-conducting plate 120 can quickly transfer the heat of the warm water in the second channel 112, so that the heat evenly covers the inner wall of the first channel 111, further preventing the valve body 101 from frosting due to continuous cryogenic liquid diversion, and ensuring long-term stable operation of the device under cryogenic conditions.

[0037] All parts not described in this invention are the same as or can be implemented using existing technology. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cryogenic liquid diversion device for air separation, characterized in that, Including valve body (101): Both ends of the valve body (101) are equipped with guide pipes (104), and the valve body (101) and the guide pipes (104) are sealed together by a flange structure. A first channel (111) for the flow of cryogenic liquid is opened in the valve body (101), and a flow regulating component is installed on the valve body (101). The flow regulating component is used to regulate the flow state of cryogenic liquid in the first channel (111). The valve body (101) is also provided with a second channel (112) adjacent to the first channel (111). The second channel (112) is used to introduce the defrosting medium. The valve body (101) is equipped with an on / off adjustment component adapted to the second channel (112). The on / off adjustment component is used to control the on / off state of the second channel (112) and the flow state of the defrosting medium. The inner wall of the first channel (111) is equipped with a heat-conducting component.

2. The air separation cryogenic liquid guiding device according to claim 1, characterized in that: The heat-conducting component includes a spiral heat-conducting plate (119). The inner wall of the first channel (111) is provided with a spiral groove (118). The spiral heat-conducting plate (119) is embedded in the inner wall of the spiral groove (118). One end of the spiral heat-conducting plate (119) passes through the second channel (112) and is fixedly connected to a limiting heat-conducting plate (120). The outer wall of the limiting heat-conducting plate (120) is fixedly connected to the inner wall of the second channel (112).

3. The air separation cryogenic liquid guiding device according to claim 1, characterized in that: The on / off adjustment assembly includes a second internal threaded block (114) fixedly installed on the outside of the valve body (101). The second internal threaded block (114) is internally threaded with a second threaded rod (115). One end of the second threaded rod (115) extends to the outside of the valve body (101) and is equipped with an adjustment knob (116). The other end extends into the second channel (112) and is fixedly connected with a second piston (117).

4. The air separation cryogenic liquid guiding device according to claim 1, characterized in that: The flange structure includes a first flange (102) fixedly installed at both ends of the valve body (101) and a second flange (105) fixedly installed at the end of the guide pipe (104). The first flange (102) and the second flange (105) are fitted together and fixedly connected by bolts.

5. The air separation cryogenic liquid guiding device according to claim 4, characterized in that: The first flange (102) has a first fixing hole (103) on its edge, and the second flange (105) has a second fixing hole (106) on its edge that matches the first fixing hole (103). Bolts are inserted into the first fixing hole (103) and the second fixing hole (106) to fix the two.

6. The air separation cryogenic liquid guiding device according to claim 1, characterized in that: The flow regulating assembly includes a first internal threaded block (107) fixedly installed on the radially outer side of the valve body (101). The first internal threaded block (107) is internally threaded with a first threaded rod (108). One end of the first threaded rod (108) extends to the outer side of the valve body (101) and is equipped with a rotating disk (109). The other end extends into the first channel (111) and is fixedly connected with a first piston (110).

7. The air separation cryogenic liquid guiding device according to claim 6, characterized in that: The first channel (111) is a straight channel that passes through the valve body (101), with its two ends opening to the middle of the first flange (102) at both ends of the valve body (101). The cross section of the first piston (110) is adapted to the flow cross section of the first channel (111).

8. The air separation cryogenic liquid guiding device according to claim 1, characterized in that: The two ends of the second channel (112) are connected to the radial outside of the valve body (101), and a pipe joint (113) for connecting to an external medium conveying pipeline is fixedly installed at each opening. The on / off adjustment component is located outside the valve body (101) and between the two pipe joints (113).

9. The air separation cryogenic liquid guiding device according to claim 3, characterized in that: The cross section of the second piston (117) is adapted to the flow cross section of the second channel (112), and the second channel (112) is arranged parallel to the first channel (111).

10. The air separation cryogenic liquid guiding device according to claim 2, characterized in that: Both the spiral heat-conducting plate (119) and the limiting heat-conducting plate (120) are made of copper.

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