A spinning connection device and flash spinning equipment

Abstract

This invention provides a spinning connection device and a flash spinning equipment. The connection device includes: a first pipe for conveying spinning solution; a second pipe sleeved outside the first pipe, the outer wall of the first pipe and the inner wall of the second pipe fitting together to form a cavity for conveying a heat-conducting medium, the second pipe having a second inlet and a second outlet communicating with the cavity, the heat-conducting medium transferring heat to the first pipe to heat the spinning solution within the first pipe; a first detection component disposed on the second pipe with its detection end located within the cavity, for measuring the temperature and pressure of the heat-conducting medium within the cavity; and a second detection component disposed on the second pipe with its detection end located within the first pipe, for measuring the temperature and pressure of the spinning solution within the first pipe. The beneficial effects of this invention are: it allows for monitoring the temperature and pressure of the spinning solution during flow and enabling real-time adjustments based on the monitoring results.

Description

Technical Field

[0001] This invention relates to the field of spinning equipment, and particularly to a spinning connection device and a flash spinning device. Background Technology

[0002] The principle of flash spinning is as follows: a polymer solution (i.e., spinning solution) under high temperature and high pressure conditions is released into an environment with normal temperature and pressure through a spinneret. The low-boiling-point solvent rapidly vaporizes and evaporates instantly, while the polymer rapidly solidifies from the liquid state and is stretched by the high-speed solvent gas to form fibers. In existing flash spinning processes, the high-temperature and high-pressure spinning solution needs to reach a critical state before being spun out. The traditional method is to let the spinning solution flow into a depressurization chamber through a pressure reducing plate (i.e., a pressure reducing plate) to reduce pressure, forming a two-phase solution (i.e., the critical state), and then eject it through the spinneret.

[0003] When the spinning solution flows from the mixing device to the nozzle, it needs to be kept under high temperature and high pressure. Therefore, it is necessary to monitor the temperature and pressure of the spinning solution during its flow and make real-time adjustments based on the monitoring results. However, there is no publicly available information in the existing technology to solve this problem. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the aforementioned problems in the prior art, the present invention provides a spinning connection device and a flash spinning equipment.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] A spinning connection device, characterized in that it comprises:

[0009] The first pipeline has a first inlet and a first outlet. The first inlet is connected to a mixing device, and the first outlet is connected to a spinning nozzle for conveying spinning solution.

[0010] The second pipe is sleeved outside the first pipe. The outer wall of the first pipe and the inner wall of the second pipe cooperate to form a cavity for conveying the heat-conducting medium. The second pipe is provided with a second inlet and a second outlet communicating with the cavity. The second inlet is connected to the outlet of the heat-conducting medium circulation device, and the second outlet is connected to the inlet of the heat-conducting medium circulation device. The heat-conducting medium can transfer heat to the first pipe to heat the spinning solution in the first pipe.

[0011] A first detection component is disposed on the second pipe, with the detection end located inside the cavity, for measuring the temperature and pressure of the heat-conducting medium inside the cavity;

[0012] The second detection component is disposed on the second pipe and the detection end is inside the first pipe, and is used to measure the temperature and pressure of the spinning solution in the first pipe.

[0013] Preferably, the first detection component and the second detection component have the same structure. The first detection component includes a first heat insulation sleeve, a first insert, a first gasket, a first sleeve, a first temperature detection unit, and a first pressure detection unit. The second pipe has an installation hole. The first heat insulation sleeve passes through the installation hole, and the lower end face of the first heat insulation sleeve is flush with the lower end face of the installation hole. The first insert is embedded in the first heat insulation sleeve. The first sleeve is inserted into the first insert and is threadedly connected to the first insert. The first temperature detection unit is provided in the first sleeve. The lower end of the first sleeve has a tapered heat-conducting part. The bottom of the first insert has a stepped hole. The first gasket is provided in the stepped hole. The bottom of the first gasket has a first tapered hole corresponding to the tapered heat-conducting part. The outer wall of the tapered heat-conducting part fits against the inner wall of the first tapered hole, and the lower end of the tapered heat-conducting part is located in the cavity. The tapered heat-conducting part transfers the temperature of the heat-conducting medium in the cavity to the first temperature detection unit. The lower outer wall of the tapered heat-conducting part is embedded with the first pressure detection unit.

[0014] Preferably, the lower end face of the first pad is in contact with the bottom inner end face of the first heat insulation sleeve.

[0015] Preferably, a fixing ring and a locking nut are fitted around the first sleeve from bottom to top, the fixing ring and the second pipe are fixed by screws, and the first sleeve and the locking nut are threaded together.

[0016] Preferably, the inner wall of the first pipe extends downward to form a guide portion, and a limiting groove is formed on the outer wall of the first pipe. The end of the guide portion is located in the limiting groove. Both ends of the second pipe are also provided with positioning elements that limit the installation of the first pipe. The positioning elements include a first sealing gasket, a first pressure ring, and a first end cap. The inner walls of both ends of the second pipe are provided with a first sealing step. The first sealing gasket is provided in the first sealing step. The end face of the first sealing gasket is fitted with the first pressure ring. The first pressure ring is sleeved on the outside of the first pipe, and the outer wall of the first pressure ring is fitted with the inner wall of the first sealing step. The end of the first pipe is provided with a second sealing step. The inner wall of the second sealing step is fitted with the inner wall of the first sealing gasket. The first end cap is sleeved on the outside of the first pipe, and the inner wall of the first end cap is threadedly connected to the outer wall of the second pipe.

[0017] Preferably, the spinning nozzle includes a nozzle body, a sleeve, and an elastic pressure regulating component. The nozzle body is hollow inside and has a first opening at one end and a spray hole at the other end. The sleeve is fixedly installed inside the first opening. The elastic pressure regulating component includes a pressure regulating rod, a pressure regulating plate, and a spring coaxially arranged with the sleeve. The sleeve is hollow inside and has a second opening at one end. The inner wall of the second opening has a thread that connects to the outer wall of the first pipe. The pressure regulating plate is located inside the sleeve and is slidably connected to the sleeve. The pressure regulating plate divides the inside of the sleeve to form a first pressure regulating chamber. The pressure regulating rod is fixedly connected to the end of the pressure regulating plate near the spray hole. The end of the pressure regulating rod passes through the sleeve and faces the spray hole. The spring is sleeved on the pressure regulating rod. One end of the spring abuts against the inner wall of the sleeve, and the other end abuts against the end face of the pressure regulating plate. The spring has a tendency to push the pressure regulating plate away from the spray hole.

[0018] Preferably, a conical pressure regulating cavity is provided between the sleeve and the nozzle body, the front end of the conical pressure regulating cavity is provided with the spray hole, and the end of the pressure regulating rod is provided with a conical pressure regulating head. When the compression of the spring changes, the gap between the outer wall of the conical pressure regulating head and the inner wall of the conical pressure regulating cavity changes, thereby adjusting the flow rate of the spray hole.

[0019] Preferably, the outer wall of the pressure regulating plate is provided with an annular sealing groove, and a sealing ring is provided in the annular sealing groove, and the sealing ring is fitted to the inner wall of the sleeve.

[0020] Preferably, both the pressure regulating plate and the sleeve are provided with pressure equalization holes that communicate with the pressure regulating cavity.

[0021] The present invention also provides a flash spinning apparatus, including the spinning connection device described in any of the above claims, and further including a mixing device and a spinning device located at both ends of the spinning connection device.

[0022] (III) Beneficial Effects

[0023] The beneficial effects of this invention are as follows: Using the above technical solution, the first pipe is connected to the mixing device, and the second pipe is sleeved outside the first pipe. The second pipe is filled with a heat-conducting medium, which can heat the spinning solution in the first pipe in real time. Simultaneously, a first detection unit and a second detection unit are provided. The first detection unit is used to measure the temperature and pressure of the heat-conducting medium in real time, and the second detection unit is used to measure the temperature and pressure of the spinning solution in real time. This allows for monitoring of the temperature and pressure of the spinning solution as it flows from the mixing device to the nozzle, ensuring that the spinning solution always maintains a high temperature and high pressure state, facilitating real-time adjustment of the temperature and pressure of the spinning solution. Attached Figure Description

[0024] Figure 1This is a schematic diagram of a spinning connection device;

[0025] Figure 2 This is a schematic diagram of the installation of the first detection unit;

[0026] Figure 3 for Figure 2 Enlarged diagram of section A in the middle;

[0027] Figure 4 This is a schematic diagram of the installation of the second detection unit;

[0028] Figure 5 This is a structural schematic diagram of the positioning component;

[0029] Figure 6 This is a schematic diagram of the installation of the first and second pipes;

[0030] Figure 7 This is a schematic diagram of the nozzle structure.

[0031] [Explanation of Labels in the Attached Image]

[0032] 1. First pipe; 11. First inlet; 12. First outlet; 13. Limiting groove; 14. Second sealing step.

[0033] 2. Second pipe; 21. Cavity; 22. Second inlet; 23. Second outlet; 24. Guide section; 25. First sealing step; 200. Mounting base; 201. Seal; 202. Pipe unit.

[0034] 3. First detection component; 31. First heat insulation sleeve; 32. First insert; 321. Stepped hole; 33. First gasket; 34. First sleeve; 341. Tapered heat-conducting part; 35. First temperature detection unit; 36. First pressure detection unit; 37. Retaining ring; 38. Locking nut.

[0035] 4. Second detection component,

[0036] 5. Positioning component; 51. First sealing gasket; 52. First pressure ring; 53. First end cap.

[0037] 6. Spinning nozzle; 61. Nozzle body; 611. First opening; 612. Nozzle; 62. Sleeve; 621. Second opening; 622. First pressure regulating chamber; 63. Elastic pressure regulating assembly; 631. Pressure regulating rod; 6311. Conical pressure regulating head; 632. Pressure regulating plate; 6321. Sealing ring; 633. Spring; 64. Pressure equalizing hole.

[0038] 7. Conical pressure regulating chamber,

[0039] 8. Insulation sleeve. Detailed Implementation

[0040] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Please refer to Figure 1 This invention provides a spinning connection device, including a first pipe 1, a second pipe 2, a first detection unit, and a second detection unit. The first pipe 1 is used to transport spinning solution. Specifically, the first pipe 1 has a first inlet 11 and a first outlet 12. The first inlet 11 is connected to a mixing device, and the first outlet 12 is connected to a spinning nozzle 6. To facilitate heating of the spinning solution in the first pipe 1 and ensure its flow within the first pipe 1, the second pipe 2 is fitted outside the first pipe 1. The outer wall of the first pipe 1 and the inner wall of the second pipe 2 cooperate to form a cavity 21 for transporting a heat-conducting medium. To facilitate the transport of the heat-conducting medium, the second pipe 2 has a second inlet 22 and a second outlet 23 communicating with the cavity 21. The second inlet 22 is connected to the outlet of a heat-conducting medium circulation device, and the second outlet 23 is connected to the inlet of the heat-conducting medium circulation device. The heat-conducting medium can transfer heat to the first pipe 1 to heat the spinning solution within it. The first detection component 3 is mounted on the second pipe 2, with its detection end located inside the cavity 21, and is used to measure the temperature and pressure of the heat-conducting medium inside the cavity 21. The second detection component 4 is mounted on the second pipe 2, with its detection end inside the first pipe 1, and is used to measure the temperature and pressure of the spinning solution inside the first pipe 1. The spinning solution flows into the first pipe 1 from the mixing device and is sprayed out from the nozzle to form spun fibers. The first detection component 3 and the second detection component 4 monitor the temperature and pressure of the heat-conducting medium and the spinning solution in real time, respectively, to facilitate the control of the temperature and pressure inside the first pipe 1 and the second pipe 2.

[0042] In this embodiment, to facilitate the design of the structure of the first detection component 3 and the second detection component 4, and to simplify the structure for easy installation, the first detection component 3 and the second detection component 4 have the same structure. Specifically, refer to... Figure 2 , Figure 3 as well as Figure 4The first detection component 3 includes a first heat insulation sleeve 31, a first insert 32, a first gasket 33, a first sleeve 34, a first temperature detection unit 35, and a first pressure detection unit 36. Since the heat transfer medium flows inside the second pipe 2, and the temperature of the heat transfer medium is higher than the temperature of the outer wall of the second pipe 2, in order to avoid affecting the detection results of the first temperature detection unit 35 during temperature detection, direct contact between the first temperature detection unit 35 and the outer wall of the second pipe 2 should be avoided. Therefore, an installation hole is provided on the second pipe 2, and the first heat insulation sleeve 31 is inserted into the installation hole. The first heat insulation sleeve 31 is made of heat insulation material, such as glass fiber or aerogel felt, which can isolate the influence of the temperature of the outer wall of the second pipe 2 on the first temperature detection unit 35. When installing the first heat insulation sleeve 31, the lower end face of the first heat insulation sleeve 31 is flush with the lower end face of the installation hole. In order to facilitate the installation of the first sleeve 34 and to ensure that the first sleeve 34 has a certain connection strength after installation, a first insert 32 is embedded in the first heat insulation sleeve. The first sleeve 34 is inserted into the first insert 32 and is connected to the first insert 32 by threads. The first insert 32 is made of metal. The first sleeve 34 is equipped with a first temperature detection unit 35. The temperature of the heat-conducting medium is transferred to the first temperature detection unit 35 through the first sleeve 34, thereby detecting the temperature of the heat-conducting medium. The first temperature detection unit 35 can be a temperature sensor. To increase the contact area between the first sleeve 34 and the heat-conducting medium, a tapered heat-conducting part 341 is provided at the lower end of the first sleeve 34. To facilitate the installation of the first sleeve 34 and ensure the sealing effect after the first sleeve 34 is installed, a stepped hole 321 is opened at the bottom of the first insert 32. A first gasket 33 is provided in the stepped hole 321. The bottom of the first gasket 33 has a first tapered hole corresponding to the tapered heat-conducting part 341. The outer wall of the tapered heat-conducting part 341 fits against the inner wall of the first tapered hole, and the lower end of the tapered heat-conducting part 341 is located in the cavity 21. The first gasket 33 is made of a flexible material, such as high-temperature resistant silicone, which can undergo a certain degree of deformation. The connection is made by threads. When the first sleeve 34 is installed, the inner wall of the first gasket 33 can be squeezed to deform the first gasket 33, ensuring that the first sleeve 34 remains sealed after being inserted into the second pipe 2. The conical heat-conducting part 341 transfers the temperature of the heat-conducting medium in the cavity 21 to the first temperature detection unit 35. In order to facilitate the detection of the pressure in the heat-conducting medium, a first pressure detection unit 36 ​​is embedded in the lower outer wall of the conical heat-conducting part 341. The internal wiring of the first pressure detection unit 36 ​​is connected to the first sleeve 34 through wires. The first pressure detection unit 36 ​​can be a high-temperature resistant pressure sensor.

[0043] Furthermore, in this embodiment, since the first insert 32 is made of metal, to avoid contact between the heat-conducting medium and the first insert 32, which could affect the detection results, the lower end face of the first pad 33 is fitted with the bottom inner end face of the first heat insulation sleeve 31. Even further, to prevent axial movement of the first heat insulation sleeve 31 and the first sleeve 34 after installation, refer to... Figure 1 A retaining ring 37 is fitted onto the first sleeve 34. The retaining ring 37 is connected to the second pipe 2 by a screw, and a locking nut 38 is threaded onto the first sleeve 34. (Refer to...) Figure 4 Since the second detection component 4 and the first detection component 3 adopt the same structure, the structure of the second detection component 4 will not be described in detail.

[0044] In this embodiment, to facilitate sealing after the first pipe 1 and the second pipe 2 are installed, it is necessary to limit the installation of the first pipe 1 and the second pipe 2 to prevent rotation after installation. (See reference...) Figure 4 A guide portion 24 is formed by a partial downward extension of the inner wall of the first pipe 1. A limiting groove 13 is formed on the outer wall of the first pipe 1, and the end of the guide portion 24 is located within the limiting groove 13, thereby restricting the rotation of the first pipe 1 and the second pipe 2. For sealing after the first pipe 1 and the second pipe 2 are connected, refer to... Figure 5 , Figure 6 At both ends of the second pipe 2, positioning components 5 are provided for installation and positioning of the first pipe 1. Specifically, the positioning component 5 includes a first sealing gasket 51, a first pressure ring 52, and a first end cap 53. The inner walls of both ends of the second pipe 2 are provided with a first sealing step 25, within which the first sealing step 25 contains the first sealing gasket 51. The end face of the first sealing gasket 51 is fitted with the first pressure ring 52, which is sleeved on the outside of the first pipe 1, with its outer wall fitting against the side wall of the first sealing step 25. To facilitate the connection between the first end cap 53 and the second pipe 2, the first end cap 53 is sleeved on the outside of the first pipe 1, with its inner wall threaded to the outer wall of the second pipe 2. The end of the first pipe 1 is provided with a second sealing step 14, the inner wall of which fits against the inner wall of the first sealing gasket 51. To facilitate contact and sealing between the first pressure ring 52 and the inner wall of the first sealing step 25, the inner wall of the first sealing step 25 is designed as a conical surface. Similarly, the outer wall of the first pressure ring 52 is also designed as a conical surface. When the first end cap 53 and the second pipe 2 are tightened, the first pressure ring 52 is compressed, and the first sealing gasket 51 is also compressed, thereby sealing the cavity 21. In this embodiment, to avoid the influence of external temperature on the internal temperature of the second pipe 2, refer to... Figure 1 , Figure 6 A heat insulation sleeve 8 is also installed outside the second pipe 2.

[0045] In this embodiment, since both the first detection unit and the second detection unit are installed on the second pipe 2, for ease of installation, refer to [reference needed]. Figure 1 The second pipe 2 includes a mounting base 200, a sealing element 201, and a pipe unit 202. The first detection unit and the second detection unit are both fixed on the mounting base 200. The mounting base 200 has a cavity that communicates with the pipe unit 202. In order to achieve sealing after the second pipe 2 is installed, a sealing element 201 is provided between the mounting base 200 and the pipe units 202 at both ends. The sealing element 201 is made of high temperature resistant silicone material. The mounting base 200, the pipe unit 202, and the sealing element 201 are connected by threads. In some embodiments, the second pipe 2 can also be integrally formed by casting.

[0046] The present invention also provides a flash spinning apparatus, including the spinning connecting device described above, and further including a mixing device and a spinning device located at both ends of the spinning connecting device. It has all the beneficial effects of the spinning connecting device, and therefore will not be described in detail here. The first inlet 11 of the first pipe 1 is connected to the mixing device, and the first outlet 12 of the first pipe 1 is connected to the spinning device.

[0047] In this embodiment, the nozzle is designed to facilitate the spraying of the spinning solution, referring to... Figure 7 The spinning nozzle 6 includes a nozzle body 61, a sleeve 62, and an elastic pressure regulating component 63. The nozzle body 61 is hollow and has a first opening 611 at one end and a spray hole 612 at the other end. The spinning solution enters the nozzle body 61 through the first opening 611 and is sprayed out through the spray hole 612. Further, to adjust the pressure at the spray hole 612, an elastic pressure regulating component 63 is provided. A sleeve 62 is fixedly installed inside the first opening 611 for mounting the elastic pressure regulating component 63. Specifically, the elastic pressure regulating component includes a pressure regulating rod 631 coaxially arranged with the sleeve 62, a pressure regulating plate 632, and a spring 633. The sleeve 62 is hollow and has a second opening 621 at one end. The inner wall of the second opening 621 has threads connecting to the outer wall of the first pipe 1. The pressure regulating plate 632 is located within the sleeve 62. The sleeve 62 is slidably connected to the pressure regulating plate 632, which divides the interior of the sleeve 62 to form a first pressure regulating chamber 622. A pressure regulating rod 631 is fixedly connected to one end of the pressure regulating plate 632 near the nozzle 612. The end of the pressure regulating rod 631 passes through the sleeve 62 and faces the nozzle 612. A spring 633 is fitted onto the pressure regulating rod 631. One end of the spring 633 abuts against the inner wall of the sleeve 62, and the other end abuts against the end face of the pressure regulating plate 632. The spring 633 has a tendency to push the pressure regulating plate 632 away from the nozzle 612. The pressure regulating rod 631 is positioned directly opposite the nozzle 612. Compressing the spring 633 adjusts the gap between the outer wall of the pressure regulating rod 631 and the nozzle 612, thereby adjusting the flow rate at the nozzle 612.

[0048] In this embodiment, to facilitate the adjustment of the pressure at the nozzle 612, specifically, refer to... Figure 7 A conical pressure regulating chamber 7 is provided between the sleeve 62 and the nozzle body 61. A nozzle 612 is located at the front end of the conical pressure regulating chamber 7, and a conical pressure regulating head 6311 is located at the end of the pressure regulating rod 631. When the spinning solution flows in from the first pipe 1, it pushes the pressure regulating plate 632, compressing the spring 633. The change in the compression of the spring 633 alters the gap between the outer wall of the conical pressure regulating head 6311 and the inner wall of the conical pressure regulating chamber 7, thereby adjusting the flow rate of the nozzle 612. To facilitate pressure changes in the spinning solution after it passes through the first pressure regulating chamber 622 and the conical pressure regulating chamber 7 from the first pipe 1, pressure equalization holes 64 communicating with the pressure regulating chambers are provided on both the pressure regulating plate 632 and the sleeve 62. Furthermore, to prevent the pressure regulating plate 632 from shaking during movement, an annular sealing groove is provided on the outer wall of the pressure regulating plate 632, and a sealing ring 6321 is provided within the annular sealing groove. The sealing ring 6321 is fitted snugly against the inner wall of the sleeve 62. In this embodiment, to ensure stable spinning of the spinning solution after it is ejected from the nozzle 612, the gap between the outer wall of the conical pressure regulating head 6311 and the inner wall of the conical pressure regulating cavity 7 is less than or equal to 0.1 mm. Preferably, in this embodiment, the gap between the outer wall of the conical pressure regulating head 6311 and the inner wall of the conical pressure regulating cavity 7 is equal to 0.08 mm, and the gap can be adjusted by adjusting the pressure in the first pipe 1 according to actual needs.

[0049] The working principle of this invention is as follows: the first inlet 11 of the first pipe 1 is connected to the mixing device, the first outlet 12 of the first pipe 1 is connected to the spinning nozzle 6, the second inlet 22 of the second pipe 2 is connected to the outlet of the heat transfer medium circulation device, and the second outlet 23 of the second pipe 2 is connected to the inlet of the heat transfer circulating medium, thereby realizing the circulation of the heat transfer medium. The first detection component 3 and the second detection component 4 respectively monitor the temperature and pressure of the heat transfer medium and the spinning solution in real time to ensure normal spinning operation.

[0050] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The scope of protection of this invention does not involve any improvement to the software and methods.

[0051] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention's specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A spinning connection device, characterized in that, include: The first pipeline has a first inlet and a first outlet. The first inlet is connected to a mixing device, and the first outlet is connected to a spinning nozzle for conveying spinning solution. The second pipe is sleeved outside the first pipe. The outer wall of the first pipe and the inner wall of the second pipe cooperate to form a cavity for conveying the heat-conducting medium. The second pipe is provided with a second inlet and a second outlet communicating with the cavity. The second inlet is connected to the outlet of the heat-conducting medium circulation device, and the second outlet is connected to the inlet of the heat-conducting medium circulation device. The heat-conducting medium can transfer heat to the first pipe to heat the spinning solution in the first pipe. A first detection component is disposed on the second pipe, with the detection end located inside the cavity, for measuring the temperature and pressure of the heat-conducting medium inside the cavity; The second detection component is disposed on the second pipe and the detection end is inside the first pipe, used to measure the temperature and pressure of the spinning solution in the first pipe; The spinning nozzle includes a nozzle body, a sleeve, and an elastic pressure regulating component. The nozzle body is hollow inside and has a first opening at one end and a spray hole at the other end. The sleeve is fixedly installed inside the first opening. The elastic pressure regulating component includes a pressure regulating rod, a pressure regulating plate, and a spring coaxially arranged with the sleeve. The sleeve is hollow inside and has a second opening at one end. The inner wall of the second opening has a thread that connects to the outer wall of the first pipe. The pressure regulating plate is located inside the sleeve and is slidably connected to the sleeve. The pressure regulating plate divides the inside of the sleeve to form a first pressure regulating chamber. The pressure regulating rod is fixedly connected to the end of the pressure regulating plate near the spray hole. The end of the pressure regulating rod passes through the sleeve and faces the spray hole. The spring is sleeved on the pressure regulating rod. One end of the spring abuts against the inner wall of the sleeve, and the other end abuts against the end face of the pressure regulating plate. The spring has a tendency to push the pressure regulating plate away from the spray hole. Both the pressure regulating plate and the sleeve are provided with pressure equalization holes that communicate with the pressure regulating cavity.

2. The spinning connection device according to claim 1, characterized in that, The first detection component and the second detection component have the same structure. The first detection component includes a first heat insulation sleeve, a first insert, a first gasket, a first sleeve, a first temperature detection unit, and a first pressure detection unit. The second pipe has an installation hole. The first heat insulation sleeve passes through the installation hole, and the lower end face of the first heat insulation sleeve is flush with the lower end face of the installation hole. The first insert is embedded in the first heat insulation sleeve. The first sleeve is inserted into the first insert and is threadedly connected to the first insert. The first temperature detection unit is located inside the first sleeve. The lower end of the first sleeve has a tapered heat-conducting part. The bottom of the first insert has a stepped hole. The first gasket is located inside the stepped hole. The bottom of the first gasket has a first tapered hole corresponding to the tapered heat-conducting part. The outer wall of the tapered heat-conducting part fits against the inner wall of the first tapered hole, and the lower end of the tapered heat-conducting part is located in the cavity. The tapered heat-conducting part transfers the temperature of the heat-conducting medium in the cavity to the first temperature detection unit. The lower outer wall of the tapered heat-conducting part is embedded with the first pressure detection unit.

3. The spinning connection device according to claim 2, characterized in that, The lower end face of the first pad is in contact with the bottom inner end face of the first heat insulation sleeve.

4. A spinning connection device according to claim 2, characterized in that, The first sleeve is fitted with a fixing ring and a locking nut from bottom to top. The fixing ring and the second pipe are fixed by screws, and the first sleeve and the locking nut are threaded together.

5. A spinning connection device according to claim 2, characterized in that, The inner wall of the first pipe extends downward to form a guide portion. A limiting groove is formed on the outer wall of the first pipe. The end of the guide portion is located in the limiting groove. Both ends of the second pipe are also provided with positioning components that limit the installation of the first pipe. The positioning components include a first sealing gasket, a first pressure ring, and a first end cap. The inner walls of both ends of the second pipe are provided with a first sealing step. The first sealing gasket is provided in the first sealing step. The end face of the first sealing gasket is fitted with the first pressure ring. The first pressure ring is sleeved on the outside of the first pipe, and the outer wall of the first pressure ring is fitted with the inner wall of the first sealing step. The end of the first pipe is provided with a second sealing step. The inner wall of the second sealing step is fitted with the inner wall of the first sealing gasket. The first end cap is sleeved on the outside of the first pipe, and the inner wall of the first end cap is threadedly connected to the outer wall of the second pipe.

6. The spinning connection device according to claim 1, characterized in that, A conical pressure regulating chamber is provided between the sleeve and the nozzle body. The front end of the conical pressure regulating chamber is provided with the spray hole. The end of the pressure regulating rod is provided with a conical pressure regulating head. When the compression of the spring changes, the gap between the outer wall of the conical pressure regulating head and the inner wall of the conical pressure regulating chamber changes, thereby adjusting the flow rate of the spray hole.

7. A spinning connection device according to claim 1, characterized in that, The outer wall of the pressure regulating plate is provided with an annular sealing groove, and a sealing ring is provided in the annular sealing groove. The sealing ring is fitted to the inner wall of the sleeve.

8. A flash spinning apparatus, comprising the spinning connection device according to any one of claims 1-5, characterized in that, It also includes a mixing device and a spinning device located at both ends of the spinning connection device.

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