Calcium carbide furnace pressure detection device

Abstract

The utility model belongs to the technical field of furnace pressure control, and discloses a calcium carbide furnace pressure detection device which comprises a pressure tapping pipe and a pressure transmitter, one end of the pressure tapping pipe is arranged in a calcium carbide furnace, the other end of the pressure tapping pipe is connected with a pressure measuring end of the pressure transmitter, and the calcium carbide furnace pressure detection device further comprises a cooling assembly. The pressure taking pipe and the pressure transmitter are arranged in the vortex chamber; the vortex tube is arranged in the vortex chamber; the air inlet end of the vortex tube is arranged outside the vortex cavity, the cold air end of the vortex tube faces the pressure tapping tube, the hot air end of the vortex tube is arranged outside the vortex cavity, and connecting flanges are arranged at the connecting ends of the pressure tapping tube and the calcium carbide furnace and the pressure transmitter; according to the scheme, the pressure tapping tube and the pressure transmitter are arranged in the vortex chamber, and the vortex tube is utilized to enable compressed air to generate vortex in the vortex tube to cool the pressure tapping tube; according to the utility model, the problem that the existing furnace pressure detection device is inaccurate in measurement in a high-temperature environment is solved.

Description

Technical Field

[0001] This solution belongs to the field of furnace pressure control technology, specifically involving a furnace pressure detection device for a calcium carbide furnace. Background Technology

[0002] Referring to the background technology in existing announcement number CN207386088U, calcium carbide furnace pressure detection technology can effectively reflect the furnace condition in real time, guiding process personnel in the operation and control of the calcium carbide furnace. Excessive or insufficient furnace pressure is undesirable. Excessive pressure, forming a positive pressure, will cause CO leakage, leading to flames erupting from the furnace cover, potentially causing hoses and other equipment to burn out, as well as personnel poisoning. Conversely, insufficient pressure, forming a negative pressure, can easily cause the material surface temperature to rise, increasing branch current and causing the electrodes to rise, resulting in a deterioration of the furnace condition.

[0003] A closed electric furnace pressure detection device is disclosed in the existing publication CN111649596A, including a pressure tapping pipe, a pressure inlet pipe, a differential pressure transmitter, and a bypass high-pressure purging gas pipe. The pressure tapping pipe is connected to the differential pressure transmitter via the pressure inlet pipe, and the differential pressure transmitter is connected to a PLC controller. The bypass high-pressure purging gas pipe is connected to the PLC controller and the pressure tapping pipe via an electromagnetic on / off valve. The pressure tapping pipe is installed on the furnace cover of the electric furnace, and a sealing end cap is detachably installed on the top of the pressure tapping pipe. The pressure inlet pipe is divided into a front pressure inlet pipe and a rear pressure inlet pipe by a buffer chamber. The pressure tapping pipe is connected to the buffer chamber via the front pressure inlet pipe, and the buffer chamber is connected to the differential pressure transmitter via the rear pressure inlet pipe.

[0004] For example, in the aforementioned furnace pressure detection device, the electric furnace operates at extremely high temperatures, typically reaching several thousand degrees Celsius. The pressure tapping pipe is usually installed on the furnace lid, directly contacting the high-temperature environment inside the furnace. Heat from inside the furnace is transferred to the pressure tapping pipe through thermal conduction and radiation, resulting in its high temperature. The gas inside the sampling pipe undergoes pressure changes due to thermal expansion, causing a deviation from the actual pressure inside the furnace, leading to inaccurate pressure readings from the differential pressure transmitter. Utility Model Content

[0005] The purpose of this solution is to provide a furnace pressure detection device for calcium carbide furnaces to solve the problem of inaccurate measurement by existing furnace pressure detection devices in high-temperature environments.

[0006] To achieve the above objectives, this solution provides a pressure detection device for a calcium carbide furnace, including a pressure tapping pipe and a pressure transmitter. One end of the pressure tapping pipe is located inside the calcium carbide furnace, and the other end is connected to the pressure measuring end of the pressure transmitter. The device also includes a cooling assembly, which comprises:

[0007] The pressure tapping tube and the pressure transmitter are both located in the eddy current chamber.

[0008] A vortex tube is disposed within a vortex chamber; the air inlet of the vortex tube is disposed outside the vortex chamber; the cold air end of the vortex tube faces the pressure tapping pipe; and the hot air end of the vortex tube is disposed outside the vortex chamber.

[0009] The principle of this solution is as follows: by placing the pressure tapping pipe and pressure transmitter in the vortex chamber, the compressed air is made to generate vortices in the vortex tube, thereby dividing the compressed air into two parts: cold air and hot air. The cold air end faces the pressure tapping pipe to cool it down, while the hot air end is discharged to the outside of the vortex chamber, thereby reducing the temperature of the pressure tapping pipe and pressure transmitter and solving the problem of inaccurate measurement of existing furnace pressure detection devices in high-temperature environments.

[0010] The effect of this solution is that it solves the problem of inaccurate measurement of existing furnace pressure detection devices in high-temperature environments. By cooling the pressure tapping tube, the pressure deviation caused by the thermal expansion of gas in the pressure tapping tube due to high temperature is reduced, enabling the pressure transmitter to measure the actual pressure in the calcium carbide furnace more accurately, thereby improving the accuracy of furnace pressure detection.

[0011] Furthermore, the connection ends of the pressure tapping pipe to the calcium carbide furnace and the pressure transmitter are all equipped with connecting flanges.

[0012] The principle and effect of this solution are: to make the connection between the pressure tapping tube and the calcium carbide furnace and pressure transmitter more stable and sealed, to prevent high-temperature gas from leaking from the connection, to ensure stable gas pressure in the pressure tapping tube, and to reduce pressure measurement deviation caused by gas leakage.

[0013] Furthermore, the pressure tapping pipe is vertically arranged and is located vertically at the top of the furnace chamber of the calcium carbide furnace, and the nominal diameter of the pressure tapping pipe is 50mm.

[0014] The principle and effect of this scheme are as follows: By vertically installing the pressure tapping pipe at the top of the calcium carbide furnace, smooth gas flow within the pipe is ensured, reducing pressure fluctuations caused by gas accumulation and improving measurement stability. The nominal diameter of the pressure tapping pipe is 50mm, which ensures sufficient gas flow to guarantee accurate measurement by the pressure transmitter, while preventing uneven gas pressure distribution within the pipe due to excessive diameter.

[0015] Furthermore, it also includes a PID controller, a frequency converter, and a coarse air blower. The PID controller is electrically connected to the pressure transmitter and is used to receive the pressure value measured by the pressure transmitter and compare it with a preset pressure value, and generate a control signal through a PID algorithm. The frequency converter is electrically connected to the PID controller and the drive motor of the coarse air blower. The frequency converter adjusts the speed of the drive motor according to the control signal sent by the PID controller. The exhaust port of the coarse air blower is connected to the flue gas outlet of the calcium carbide furnace through a duct.

[0016] The principle and effect of this scheme are as follows: The pressure transmitter measures the pressure value inside the calcium carbide furnace in real time and transmits it to the PID controller. The controller compares the real-time pressure value with the preset pressure value and generates a control signal based on the PID algorithm. After receiving this signal, the frequency converter adjusts the speed of the rough air blower drive motor accordingly. The rough air blower is connected to the flue gas outlet of the calcium carbide furnace through a duct, and its speed change directly affects the air extraction volume, thereby adjusting the pressure inside the calcium carbide furnace.

[0017] Furthermore, it also includes a flow guiding assembly located within the vortex chamber. The flow guiding assembly includes a sleeve and a support. The outer wall of the sleeve is slidably connected to the support. The sleeve has several through holes. The pressure tapping pipe is located inside the sleeve. The cold air end of the vortex tube is connected to an air supply pipe through a pipeline. The free end of the air supply pipe is located inside the sleeve.

[0018] The principle and effect of this solution are as follows: Although the aforementioned solution places the pressure tapping tube in the vortex chamber and cools it through the cold air end of the vortex tube, the cold air is mainly concentrated around the outlet of the air supply pipe, and cannot effectively cool the rest of the pressure tapping tube simultaneously. This limited local cooling effect leads to uneven temperature drop across the pressure tapping tube, thus affecting the accuracy of pressure measurement. This solution utilizes the sliding connection between the sleeve and the support, as well as the through-holes on the sleeve, to evenly distribute the cold air from the cold air end of the vortex tube within the sleeve. Finally, the air is sprayed out through the through-holes on the sleeve to circumferentially cool the pressure tapping tube, achieving a better cooling effect. The cold air flows out through the through-holes within the sleeve, forming a uniform cooling airflow and reducing the temperature of the pressure tapping tube.

[0019] Furthermore, the through holes are evenly arrayed along the circumferential direction of the center of the sleeve, and multiple sets of through holes are arrayed along the length of the sleeve.

[0020] The principle and effect of this solution are as follows: by uniformly arranging the through holes along the circumference of the sleeve and arranging multiple sets of through holes along the length of the sleeve, the cold air can evenly cover the outer wall of the pressure tapping tube, and the cold air can be evenly sprayed out from all directions of the sleeve, thereby cooling the pressure tapping tube in all directions.

[0021] Furthermore, the inner wall of the sleeve is provided with a reversing plate, the reversing plate is inclined, and the free end of the air supply pipe faces the reversing plate.

[0022] The principle and effect of this solution are as follows: An inclined reversing plate is installed on the inner wall of the sleeve, with the free end of the air supply duct facing the reversing plate. When cold air is ejected from the air supply duct, the cold air acts on the inclined reversing plate, generating a force that causes the reversing plate to rotate the sleeve on the support. As the sleeve rotates, cold air is ejected circumferentially, thus enveloping the outer wall of the pressure tapping pipe. This allows the cold air to be more evenly distributed throughout the entire sleeve, avoiding the problem of poor localized cooling caused by concentrated airflow.

[0023] Furthermore, nozzles are symmetrically arranged on the upper and lower sides of the bracket, and the nozzles are connected to the cold air end of the vortex tube through pipes.

[0024] The principle and effect of this solution are as follows: by setting nozzles on the bracket, when cold air is sprayed out from the nozzles, a reaction force is generated according to Newton's third law, which pushes the bracket and sleeve to move along the length of the pressure tapping pipe. This allows the cold air to not only be evenly distributed around the pressure tapping pipe, but also to cover different positions of the pressure tapping pipe by moving the sleeve, thus achieving a more comprehensive and uniform cooling effect.

[0025] Furthermore, two push-button switches are symmetrically arranged in the eddy current chamber along the length of the pressure tapping tube. The bracket is used to abut the push-button switches, and the push-button switches are electrically connected to the controller of the eddy current tube.

[0026] The principle and effect of this solution are as follows: Two push-button switches are used to control the nozzles of the bracket separately. When the bracket moves to its extreme position on one side, it will trigger one of the push-button switches, which in turn controls the vortex tube to supply air to the nozzle on that side, causing the bracket to move to the other side. When the bracket moves to the other side, it will trigger the other push-button switch, which again controls the vortex tube to supply air to the nozzle on that side, causing the bracket to move to the other side. Through the cooperation of the push-button switches and the bracket, the bracket drives the sleeve to reciprocate along the length of the pressure tapping tube, thereby reciprocatingly cooling the pressure tapping tube.

[0027] Furthermore, the contact surface between the bracket and the sleeve is provided with a slide rail, which is a circumferentially arranged slide rail, and the outer wall of the sleeve is slidably connected to the slide rail; the vortex chamber is provided with a guide groove, which is arranged along the length direction of the pressure tapping tube, and the bracket is slidably connected to the guide groove.

[0028] The principle and effect of this solution are as follows: the slide rail is used to guide the rotation of the sleeve; the guide groove is used to provide positioning and guidance for the support to move along the length of the pressure tapping tube. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the internal structure of a calcium carbide furnace pressure detection device according to the present invention. Figure 1 ;

[0030] Figure 2 This is a schematic diagram of the internal structure of a calcium carbide furnace pressure detection device according to the present invention. Figure 2 ;

[0031] Figure 3 This is a schematic diagram of the flow guiding component of this utility model.

[0032] The corresponding labels in the attached diagram are as follows: pressure tap 1, connecting flange 11, pressure transmitter 2, calcium carbide furnace 3, cooling assembly 4, vortex chamber 41, vortex tube 42, air inlet 421, cold air end 422, hot air end 423, air supply pipe 43, flow guide assembly 5, sleeve 51, through hole 511, bracket 52, reversing plate 53, nozzle 54, and push switch 55. Detailed Implementation

[0033] The following will describe the concept and technical effects of this utility model clearly and completely with reference to the embodiments, so as to fully understand the purpose, features and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model.

[0034] Example 1:

[0035] Please see Figure 1A pressure detection device for a calcium carbide furnace includes a pressure tapping tube 1 and a pressure transmitter 2. The pressure transmitter 2 is a diaphragm-type capillary pressure transmitter, so that the pressure of the measured medium acts on the isolation diaphragm of the diaphragm. The diaphragm is usually made of a thin metal film with good elasticity, and the diaphragm will undergo corresponding elastic deformation when the pressure changes. The diaphragm is connected to the sensitive element of the transmitter through the filling liquid in the capillary tube. The filling liquid is generally silicone oil or fluorinated oil, which has the characteristics of small thermal temperature coefficient, non-freezing at low temperature, non-volatile and non-vaporizing at high temperature, and viscosity that does not change significantly with temperature, and can accurately transmit the deformation of the diaphragm to the sensitive element of the transmitter. One end of the pressure tapping tube 1 is located inside the calcium carbide furnace 3, and the other end is connected to the pressure measuring end of the pressure transmitter 2. The pressure tapping tube 1 is set vertically and is located vertically at the top of the furnace chamber of the calcium carbide furnace 3. The pressure tapping tube 1 is a DN50 pressure tapping tube. The connection ends of the pressure tapping pipe 1 with the calcium carbide furnace 3 and the pressure transmitter 2 are all equipped with connecting flanges 11 to ensure the sealing of the connection and prevent pressure leakage. It also includes a cooling assembly 4, which comprises an eddy current chamber 41 and an eddy current tube 42. The pressure tapping pipe 1 and the pressure transmitter 2 are both located inside the eddy current chamber 41, and the eddy current tube 42 is located inside the eddy current chamber 41. The air inlet end 421 of the eddy current tube 42 is located outside the eddy current chamber 41, the cold air end 422 of the eddy current tube 42 faces the pressure tapping pipe 1, and the hot air end 423 of the eddy current tube 42 is located outside the eddy current chamber 41. When an alternating magnetic field passes through a conductor, an induced current, i.e., an eddy current, is generated inside the conductor. According to Joule's law, eddy currents generate heat when flowing in a conductor. This heat is dissipated through conduction, convection, and radiation, thus achieving cooling. By applying eddy currents to air at approximately 0.5 MPa at room temperature, the temperature at the cold end can be reduced to below 0°C, and the heat source is exhausted outside the sealed casing 27. In a diaphragm-type capillary pressure transmitter, the eddy current tube 42 typically consists of an electromagnetic coil that generates an alternating magnetic field and a metal component capable of generating eddy currents. An alternating current is passed through the electromagnetic coil, generating an alternating magnetic field. This magnetic field acts on appropriate metal components within the transmitter, inducing eddy currents and achieving a cooling effect.

[0036] The specific working principle is as follows: By placing the pressure tapping pipe 1 and the pressure transmitter 2 inside the eddy current chamber 41, the compressed air is made to generate eddies in the eddy current tube 42, thereby dividing the compressed air into two parts: cold air and hot air. The cold air end faces the pressure tapping pipe 1 to cool it down, while the hot air end is discharged to the outside of the eddy current chamber 41, thereby reducing the temperature of the pressure tapping pipe 1 and the pressure transmitter 2, and solving the problem of inaccurate measurement of existing furnace pressure detection devices in high-temperature environments.

[0037] The system also includes a PID controller, a frequency converter, and a coarse air blower. The PID controller is electrically connected to the pressure transmitter 2. The PID controller receives the pressure value measured by the pressure transmitter 2 and compares it with a preset pressure value, generating a control signal through a PID algorithm. The frequency converter is electrically connected to the PID controller and the drive motor of the coarse air blower. The frequency converter adjusts the speed of the drive motor according to the control signal sent by the PID controller. The exhaust port of the coarse air blower is connected to the flue gas outlet of the calcium carbide furnace 3 via a duct. Through the above device, closed-loop PID regulation of the pressure inside the calcium carbide furnace 3 is achieved. The PID control algorithm finely regulates the pressure, ensuring that the pressure quickly and accurately stabilizes within the desired setpoint range regardless of changes in the pressure setpoint or external disturbances, meeting the requirements for precise pressure control in various applications such as industrial production. The various components in the PID control work together: the derivative component suppresses oscillations, the integral component eliminates steady-state errors, and the proportional component provides a fast response. Together, they enhance the stability of the entire pressure control system, reducing pressure fluctuations and instability, and ensuring the smooth and safe operation of the production process. When faced with complex situations such as changes in operating conditions and load, the PID negative feedback mechanism can adaptively adjust the control strategy, enabling the system to maintain good control performance and strong robustness. It does not require frequent manual intervention, thus reducing manual management costs.

[0038] Example 2:

[0039] Please see Figure 2 and Figure 3 The differences between this embodiment and the previous embodiment are as follows:

[0040] It also includes a flow guiding assembly 5 disposed within the vortex chamber 41. The flow guiding assembly 5 includes a sleeve 51 and a support 52. The outer wall of the sleeve 51 is slidably connected to the support 52. A slide rail (not shown in the figure) is provided on the contact surface between the support 52 and the sleeve 51. The slide rail is a circumferentially arranged slide rail. The outer wall of the sleeve 51 is slidably connected to the slide rail. The sleeve 51 rotates circumferentially within the support 52 along the slide rail. The sleeve 51 is provided with a plurality of through holes 511. The through holes 511 are evenly arrayed along the circumferential direction of the center of the sleeve 51, and multiple sets of through holes 511 are arrayed along the length of the sleeve 51. By evenly arraying the through holes 511 along the circumferential direction of the center of the sleeve 51 and along the length of the sleeve 51, the flow guiding assembly 5 can achieve the desired effect. The sleeve 511 has multiple sets of through holes along its length, allowing cold air to evenly cover the outer wall of the pressure tapping tube 1. This ensures the cold air is evenly ejected from all directions of the sleeve 51, providing comprehensive cooling for the pressure tapping tube 1. The pressure tapping tube 1 is located inside the sleeve 51. The cold air end of the vortex tube 42 is connected to an air supply pipe 43 via a pipe. The free end of the air supply pipe 43 is located inside the sleeve 51. The inner wall of the sleeve 51 is equipped with a reversing plate 53, which is inclined. The free end of the air supply pipe 43 faces the reversing plate 53. When cold air is ejected from the air supply pipe 43, it acts on the inclined reversing plate 53, generating a force that causes the reversing plate 53 to rotate the sleeve 51 on the support 52. As the sleeve 51 rotates, cold air is ejected circumferentially, thus enveloping the outer wall of the pressure tapping tube 1. This allows the cold air to be more evenly distributed throughout the sleeve 51, avoiding the problem of poor local cooling due to concentrated airflow.

[0041] To enable the support 52 to drive the sleeve 51 to reciprocate along the length of the pressure tapping pipe 1, thereby reciprocatingly cooling the pressure tapping pipe 1, two symmetrically arranged nozzles 54 are provided on both the upper and lower sides of the support 52. The nozzles 54 are connected to the cold air end of the vortex tube 42 through pipes. Two push switches 55 are symmetrically arranged in the vortex chamber 41 along the length of the pressure tapping pipe 1. The support 52 is used to abut against the push switches 55. The push switches 55 are electrically connected to the controller of the vortex tube 42. The two push switches 55 are used to control the nozzles 54 on the support 52 respectively. A guide groove (not shown in the figure) is provided in the vortex chamber 41. The guide groove is arranged along the length of the pressure tapping pipe 1. The support 52 is slidably connected to the guide groove. The guide groove is used to provide positioning and guidance for the support to move along the length of the pressure tapping pipe.

[0042] Specific working principle: By setting nozzles 54 on the bracket 52, when cold air is sprayed from the nozzles 54, a reaction force is generated according to Newton's third law, thereby pushing the bracket 52 and sleeve 51 to move along the length of the pressure tapping pipe 1. This allows the cold air to not only be evenly distributed around the pressure tapping pipe 1, but also to cover different positions of the pressure tapping pipe 1 by moving the bracket 52 and sleeve 51, achieving a more comprehensive and uniform cooling effect. When the bracket 52 moves to the extreme position on one side, it will touch one of the push-button switches 55. The controller then controls the vortex tube 42 to supply air to the nozzle 54 on that side, causing the bracket 52 to move to the other side. When the bracket 52 moves to the other side, it will touch another push-button switch 55. Then, the controller again controls the vortex tube 42 to supply air to the nozzle 54 on that side, causing the bracket 52 to move to the other side. Through the cooperation of the push-button switches 55 and the bracket 52, the bracket 52 drives the sleeve 51 to reciprocate along the length of the pressure tapping pipe 1, thereby reciprocating the cooling of the pressure tapping pipe 1.

[0043] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A calcium carbide furnace pressure detection device, comprising a pressure tapping pipe (1) and a pressure transmitter (2), one end of the pressure tapping pipe (1) is arranged in a calcium carbide furnace (3), and the other end is connected with a pressure measuring end of the pressure transmitter (2), characterized in that, Further comprising a cooling assembly (4), the cooling assembly (4) comprises: A vortex chamber (41), the pressure tapping pipe (1) and the pressure transmitter (2) are arranged in the vortex chamber (41); A vortex tube (42) is arranged in the vortex chamber (41); the air inlet end (421) of the vortex tube (42) is arranged outside the vortex chamber (41), the cold air end (422) of the vortex tube (42) faces the pressure tapping pipe (1), and the hot air end (423) of the vortex tube (42) is arranged outside the vortex chamber (41).

2. The calcium carbide furnace pressure detection device according to claim 1, characterized in that: The connecting end of the pressure tapping pipe (1) and the calcium carbide furnace (3) and the pressure transmitter (2) is provided with a connecting flange (11).

3. The calcium carbide furnace pressure detection device according to claim 1, characterized in that: The pressure tapping pipe (1) is vertically arranged, and the pressure tapping pipe (1) is vertically arranged on the top of the hearth of the calcium carbide furnace (3), and the nominal diameter of the pressure tapping pipe (1) is 50mm.

4. The calcium carbide furnace pressure detection device according to claim 1, characterized in that: Further comprising a PID controller, a frequency converter and a coarse gas fan, the PID controller is electrically connected with the pressure transmitter (2), the PID controller is used for receiving the pressure value measured by the pressure transmitter (2) and comparing with the preset pressure value, and generating a control signal through a PID algorithm; the frequency converter is electrically connected with the PID controller and the driving motor of the coarse gas fan, the frequency converter adjusts the rotating speed of the driving motor according to the control signal sent by the PID; the air outlet of the coarse gas fan is communicated with the flue gas outlet of the calcium carbide furnace (3) through a wind pipe.

5. The calcium carbide furnace pressure detection device according to claim 1, characterized in that: Further comprising a guide assembly (5) arranged in the vortex chamber (41), the guide assembly (5) comprises a sleeve (51) and a support (52), the outer wall of the sleeve (51) is slidably connected with the support (52), the sleeve (51) is provided with a plurality of through holes (511), the pressure tapping pipe (1) is arranged in the sleeve (51), and the cold air end of the vortex tube (42) is connected with a air supply pipe (43) through a pipeline.

6. The calcium carbide furnace pressure detection device according to claim 5, characterized in that: The through holes (511) are uniformly arranged along the circumferential direction of the center of the sleeve (51), and a plurality of groups of through holes (511) are arranged along the length direction of the sleeve (51).

7. The calcium carbide furnace pressure detection device according to claim 6, characterized in that: The inner wall of the sleeve (51) is provided with a reversing plate (53), the reversing plate (53) is arranged obliquely, and the free end of the air supply pipe (43) faces the reversing plate (53).

8. The calcium carbide furnace pressure detection device according to claim 7, characterized in that: The upper and lower sides of the support (52) are symmetrically provided with nozzles (54), and the nozzles (54) are communicated with the cold air end of the vortex tube (42) through a pipeline.

9. A calcium carbide furnace pressure detection device according to claim 8, characterized in that: Two pressing switches (55) are symmetrically arranged along the length direction of the pressure tapping pipe (1) in the vortex chamber (41), the support (52) is used for abutting against the pressing switch (55), and the pressing switch (55) is electrically connected with the controller of the vortex tube (42).

10. The calcium carbide furnace pressure detection device of claim 9, wherein: The contact surface of the support (52) and the sleeve (51) is provided with a slide rail, the slide rail is a circumferentially arranged slide rail, the outer wall of the sleeve (51) is slidably connected with the slide rail; a guide groove is arranged in the vortex chamber (41), the guide groove is arranged along the length direction of the pressure tapping pipe (1), and the support (52) is slidably connected with the guide groove.

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