Method for assembling a multifunctional tube and multifunctional tube

Abstract

The present application relates to a kind of multifunctional pipeline assembly method and multifunctional pipeline, belong to composite precision forming technical field, solve the single function of existing pipeline, the pipeline of ventilation pipeline and electric signal is set apart, cannot satisfy the use demand in narrow cabin problem.The assembly method of the multifunctional pipeline, comprising the following steps: step 1: connecting the gas path main body with the connecting seat, obtain gas path assembly;Step 2: the insulation part is set in the outside of thermocouple, and thermocouple is fixed on the connecting seat;Step 3: sleeve assembly is set in the outside of gas path main body and thermocouple;Step 4: connecting the gas path main body with the pipe mouth;Step 5: the free end of thermocouple is connected with electric connector, obtain multifunctional pipeline.The present application realizes the diversification of pipeline function, a pipeline has both ventilation function, and has electric function.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of precision forming, in particular to a multifunctional pipeline assembly method and multifunctional pipeline. BACKGROUND

[0002] With the development of aerospace technology, miniaturization and structural weight reduction become increasingly important, and the cabin space becomes increasingly narrow, so it is required to prepare a pipeline that can output an electrical signal and has a ventilation function in a narrow space.

[0003] The existing pipeline has a single function, and the ventilation pipeline and the electrical signal pipeline are separately arranged, which cannot meet the use requirements in the narrow cabin. SUMMARY

[0004] In view of the above analysis, the present application aims to provide a multifunctional pipeline assembly method and multifunctional pipeline to solve the problem that the existing pipeline has a single function, the ventilation pipeline and the electrical signal pipeline are separately arranged, and cannot meet the use requirements in the narrow cabin.

[0005] The purpose of the present application is mainly realized through the following technical solutions:

[0006] On the one hand, the present application provides a multifunctional pipeline assembly method, comprising the following steps:

[0007] Step 1: connecting the air path main body and the connecting seat to obtain an air path assembly;

[0008] Step 2: sleeving the insulation part on the outside of the thermocouple and fixing the thermocouple on the connecting seat;

[0009] Step 3: sleeving the sleeve assembly on the outside of the air path main body and the thermocouple;

[0010] Step 4: connecting the air path main body and the pipe mouth;

[0011] Step 5: connecting the free end of the thermocouple and the electrical connector to obtain a multifunctional pipeline.

[0012] Optionally, the step 2 comprises the following steps:

[0013] Step 21: placing the node of the thermocouple at the communication between the first groove and the axial through hole on the end face of one end of the connecting main body of the connecting seat, and suspending the node;

[0014] Step 22: sleeving the insulation part on the thermocouple;

[0015] Step 23: fixing the thermocouple in the second groove on the side surface of the connecting main body.

[0016] Optionally, the step 22 comprises sequentially sleeving the plurality of insulation units on the thermocouple.

[0017] Optionally, the step 3 comprises the following steps:

[0018] Step 31: sleeving the first sleeve assembly outside the gas path body and the thermocouple;

[0019] Step 32: sleeving the second sleeve assembly outside the gas path body and the thermocouple, downstream of the first sleeve assembly.

[0020] Optionally, the step 31 further comprises: if there is a damaged insulation unit during the sleeving of the first sleeve assembly, removing the damaged insulation unit and re-sleeving the subsequent insulation units after the subsequent insulation units are arranged in order.

[0021] Optionally, the material of the insulation part is alumina ceramic.

[0022] Optionally, the insulation unit is a hollow cylinder.

[0023] Optionally, the length of the insulation unit is 5mm, the inner diameter is 0.5mm, and the outer diameter is 1mm.

[0024] Optionally, the thermocouple is a platinum rhodium wire.

[0025] In another aspect, the application also provides a multifunctional pipeline, which is assembled by using the above-mentioned assembly method, and comprises a gas path assembly, a thermocouple, a first sleeve assembly, a second sleeve assembly, a pipe connector, and an electrical connector; the gas path assembly is connected with the pipe connector, and is used for realizing the ventilation of the pipeline; the thermocouple is fixed in the second groove of the gas path assembly, and the free end thereof is connected with the electrical connector, and is used for realizing the electrical signal of the pipeline; the gas path assembly comprises a connecting seat and a gas path body, and the first sleeve assembly and the second sleeve assembly are both sleeved outside the gas path body.

[0026] Compared with the prior art, the application can at least realize one of the following beneficial effects:

[0027] (1) The assembly method of the application can obtain a multifunctional pipeline, which comprises a gas path assembly, a thermocouple, a first sleeve assembly, a second sleeve assembly, a pipe connector, and an electrical connector; wherein a first groove for placing the thermocouple is arranged on the connecting main body, so that the axial through hole arranged on the connecting main body can provide a gas passage, and the connecting end for providing an electrical signal can be provided, so that the pipeline connector of the application has gas-electric dual functions.

[0028] (2) The application realizes the venting function of the pipeline by setting the first groove on the end face of the connecting body, setting the through hole along the axial direction of the connecting body, and suspending the node of the thermocouple at the communication between the first groove and the through hole, so that the gas can enter the through hole and the gas path body through the gap between the node and the connecting body.

[0029] (3) The application realizes the venting function of the pipeline by setting the first groove on the end face of the connecting body, setting the second groove on the outer surface of the connecting body, and connecting the first groove and the second groove, so that the thermocouple can be placed in the first groove and the second groove in order, on the one hand, reducing the risk of short circuit caused by the contact between the thermocouple and other metals, on the other hand, reducing the volume of the pipeline as a whole.

[0030] (4) The application can prevent the connecting body from being in conduction with the thermocouple by spraying an insulating coating on the end face of the first groove.

[0031] (5) The application can make the connection between the connecting body and the gas path body more firm by setting the slot at the connection between the connecting body and the gas path body.

[0032] (6) The application can make the thermocouple insulated from other metals of the pipeline by setting the insulating part outside the thermocouple, so as to realize the function of transmitting electric signals by the thermocouple, and make the transmitted electric signals clear and stable.

[0033] (7) The application can position and limit the sleeve body on the cabin body by setting the limiting sleeve outside the sleeve body, so as to save the internal space of the cabin body. By reasonably setting the spacing between the multiple limiting sleeves, other lines or components can pass through the gap between the adjacent limiting sleeves, further saving the internal space of the cabin body.

[0034] (8) In the forming method of the pipeline with the venting and power transmission dual functions, the first sleeve assembly and the second sleeve assembly are not bent and formed before being sleeved into the gas path body, but are bent and formed after being sleeved into the gas path body, which reduces the damage to the insulating part outside the thermocouple during the sleeving process of the first sleeve assembly and the second sleeve assembly, effectively ensures the insulation of the thermocouple and the remaining metal parts of the pipeline, and improves the qualification rate of the pipeline with the venting and power transmission dual functions.

[0035] (9) In the forming method of the pipeline with the venting and power transmission dual functions, the air tightness and / or insulation test is performed after each operation, which can timely find the problem and timely process, improving the forming efficiency and forming qualification rate.

[0036] (10) The present application is directed to the problem that it is difficult to carry out the positive pressure air tightness test when the thermocouple is bonded in the second groove, and the vacuum bag is used to carry out the negative pressure test, which can ensure the completion of the air tightness test and protect the thermocouple from being damaged.

[0037] (11) The present application sets the flow guide, which can limit the airflow from the through hole on the connecting body 1-1 to enter, improve the ventilation effect, and protect the front-end thermocouple.

[0038] (12) The present application sets the weak part, which facilitates the realization of the pipeline after the corresponding function is broken off.

[0039] (13) The present application sets the protection tool, which can effectively prevent the fracture at the weak part in the subsequent turnover and processing process.

[0040] In the present application, the above-mentioned technical solutions can be combined with each other to realize more preferred combination schemes. Other features and advantages of the present application will be described in the subsequent specification, and some advantages will become apparent from the specification or by implementing the present application. BRIEF DESCRIPTION OF DRAWINGS

[0041] The accompanying drawings are included to provide a further understanding of the application and are incorporated herein and constitute a part of the application. The drawings illustrate embodiments of the application and, together with the description, serve to explain the principles of the application. In the drawings:

[0042] Figure 1 Structure diagram of the pipeline with ventilation and power supply functions of the present application;

[0043] Figure 2 Structure diagram of the gas path assembly;

[0044] Figure 3 Structure diagram of the first sleeve assembly;

[0045] Figure 4 Structure diagram of the second sleeve assembly;

[0046] Figure 5 Structure diagram of the gas path body provided with a weak part (annular groove);

[0047] Figure 6 Structure diagram of the protection tool;

[0048] Figure 7 Structure diagram of the flow guide;

[0049] Figure 8 Structure diagram of the tool electrode of the present application;

[0050] Figure 9 Structure diagram of the Figure 8 Cross-sectional view at A-A in the present application;

[0051] Figure 10 Figure 1 is a schematic diagram of the cross section of the tool electrode of the present application; Figure 8 Figure 2 is a schematic diagram of the cross section of the tool electrode of the present application;

[0052] Figure 11 Figure 3 is a schematic diagram of the structure of the tool electrode of the present application when the center line of the discharge end of the tool electrode coincides with the central axis of the inner cavity of the stainless steel pipe;

[0053] Figure 12 Figure 4 is a schematic diagram of the structure of the tool electrode of the present application when the center line of the discharge end of the tool electrode deviates from the central axis of the inner cavity of the stainless steel pipe;

[0054] Figure 13 Figure 5 is a schematic diagram of the cross section of the tool electrode of the present application when the discharge end of the tool electrode is sleeved on the stainless steel pipe;

[0055] Figure 14 Figure 6 is a schematic diagram of the movement trajectory of the center point O2 of the discharge end of the tool electrode of the present application when the discharge end of the tool electrode moves eccentrically around the central axis of the inner cavity of the stainless steel pipe;

[0056] Figure 15 Figure 7 is a schematic diagram of the movement trajectory of any point O3 of the discharge end of the tool electrode of the present application when the discharge end of the tool electrode moves eccentrically around the central axis of the inner cavity of the stainless steel pipe;

[0057] Figure 16 Figure 8 is a schematic diagram of the structure of the bearing assembly of the present application and the stainless steel pipe;

[0058] Figure 17 Figure 9 is a schematic diagram of the structure of the annular groove of the stainless steel pipe of the present application;

[0059] Figure 18 Figure 10 is a schematic diagram of the structure of the equal-height positioning block, the clamping plate and the stainless steel pipe of the present application;

[0060] Figure 19 Figure 11 is a schematic diagram of the structure of the auxiliary bearing block and the stainless steel pipe of the present application.

[0061] Reference signs:

[0062] 1. Gas path assembly; 1-1. Connecting body; 1-2. Gas path body; 1-3. Through hole; 1-4. First groove; 1-5. Second groove; 1-6. First opening groove; 1-7. Protrusion; 2. First sleeve assembly; 2-1. First sleeve body; 2-2. First limiting sleeve; 2-3. Connecting sleeve; 3. Second sleeve assembly; 3-1. Second sleeve body; 3-2. Second limiting sleeve; 4. Thermocouple; 5. Connecting nozzle; 6. Electrical connector; 7. Weak point; 8. 8-1. Protective fixture; 8-2. Clamping component; 8-3. Anti-loosening component; 8-4. Through groove; 9. Guide component; 9-1. Guide body; 9-2. Guide cap; 9-3. Guide hole; 10. Tool electrode; 11. Worktable; 12. Height positioning block; 13. Auxiliary bearing block; 14. Clamping plate; 15. Transmission rod; 101. Discharge end; 102. Working end; 103. Non-working end; 104. Conductive end; 16. Machining direction; 17. Eccentric motion direction;

[0063] H1, wall thickness of the stainless steel pipe; H2, wall thickness of the annular groove; α, bevel angle; S 11 S 12 S 13 S 14 1. Actual clearance values ​​between four points selected on the circular working end of the tool electrode and the outer end face of the stainless steel tube; S2. Machining clearance; O1. Center point of the discharge end; O2. Center point of the inner cavity of the stainless steel tube; O3. Points selected on the discharge end. Detailed Implementation

[0064] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0065] Example 1

[0066] A specific embodiment of the present invention discloses a pipeline with dual functions of ventilation and power supply, such as... Figure 1 As shown, the system includes a gas path assembly 1, a first sleeve assembly 2, a second sleeve assembly 3, a thermocouple 4, a connector 5, and an electrical connector 6. The gas path assembly 1 is connected to the connector 5 to allow gas to flow through the pipeline. The thermocouple 4 is fixed to the gas path assembly 1, and its free end is connected to the electrical connector 6 to provide an electrical signal for the pipeline. The first sleeve assembly 2 and the second sleeve assembly 3 are fitted over the gas path assembly 1 and the thermocouple 4 to protect them.

[0067] like Figure 2As shown, the gas path assembly 1 comprises a connecting seat and a gas path body 1-2. The connecting seat comprises a connecting body 1-1, the connecting body 1-1 is provided with an axial through hole 1-3, one end of the connecting body 1-1 is connected with the gas path body 1-2, and the end face of the other end is provided with a first groove 1-4 for placing the thermocouple 4, the first groove 1-4 is in the shape of "one", and the length thereof is equal to the outer diameter of the connecting body 1-1. The through hole 1-3 is in communication with the first groove 1-4.

[0068] The first sleeve assembly 2 and the second sleeve assembly 3 are both sleeved outside the gas path body 1-2 and the thermocouple 4, for protecting the gas path body 1-2 and the thermocouple 4, and the second sleeve assembly 3 is located downstream of the first sleeve assembly 2.

[0069] In a preferred embodiment, the end face of the connecting body 1-1 provided with the first groove 1-4 is provided with an insulating coating, so as to prevent the connecting body 1-1 from being in conduction with the thermocouple 4.

[0070] The side face of the connecting body 1-1 is provided with a second groove 1-5, the second groove is parallel to the axial direction of the connecting body 1-1, and extends from one end of the connecting body 1-1 to the other end. The number of the second grooves 1-5 is two, and both are in communication with the first groove. The two second grooves are symmetrically arranged relative to the through hole.

[0071] In a possible embodiment, the connecting seat further comprises a protrusion 1-7, which is arranged at one end of the connecting body 1-1 connected with the gas path body 1-2, and the protrusion 1-7 is circumferentially arranged along the outer surface of the connecting body 1-1. The connecting body 1-1 is provided with external threads, so as to be connected with other components (such as a flow guide). The protrusion plays a limiting role to prevent over-tightening. The protrusion 1-7 is provided with a radial opening slot.

[0072] Specifically, the opening slot comprises a first opening slot 1-6 and a second opening slot. The number of the first opening slot 1-6 and the second opening slot is both two. The two first opening slots 1-6 and the two second opening slots are alternately and uniformly distributed in the circumferential direction. Among them, the two first opening slots 1-6 are respectively in communication with the two second grooves, so as to facilitate the thermocouple 4 to pass through. The two second opening slots are used for the overall installation of the pipeline. Exemplarily, the protrusion 1-7 is in the structure of a flange plate.

[0073] Further, the connection between the connecting body 1-1 and the gas path body 1-2 is provided with a welding slot (not shown in the figure). Through the above arrangement, the welding of the connecting body 1-1 and the gas path body 1-2 can be more reliable.

[0074] The other end of the gas path body 1-2 is connected with a pipe nozzle 5. Specifically, the gas path body 1-2 is a stainless steel pipe with a diameter of 2 mm and a wall thickness of 0.5 mm.

[0075] As shown in FIG. 1, the gas path assembly 1 comprises a connecting seat and a gas path body 1-2. The connecting seat comprises a connecting body 1-1, the connecting body 1-1 is provided with an axial through hole 1-3, one end of the connecting body 1-1 is connected with the gas path body 1-2, and the end face of the other end is provided with a first groove 1-4 for placing the thermocouple 4, the first groove 1-4 is in the shape of "one", and the length thereof is equal to the outer diameter of the connecting body 1-1. The through hole 1-3 is in communication with the first groove 1-4. Figure 3As shown, the first sleeve assembly 2 includes a first sleeve body 2-1, a first limiting sleeve 2-2, and a connecting sleeve 2-3. The first sleeve body 2-1 is a hollow tube, which is fitted onto the outside of the gas path body 1-2 to protect the gas path body 1-2 and the thermocouple 4. The first limiting sleeve 2-2 is a hollow tube, which is fitted onto the outside of the first sleeve body 2-1 to position and limit the first sleeve body 2-1 on the cabin, thereby positioning and limiting the gas-electric dual-function pipeline on the cabin. Specifically, the bottom of the limiting portion of the first limiting sleeve 2-2 is coated and adhered to the cabin wall. The connecting sleeve 2-3 is fitted onto the outside of the first sleeve body 2-1, at one end of the first sleeve body 2-1, and is connected to the connecting body 1-1.

[0076] In a preferred embodiment, there are multiple first limiting sleeves 2-2, which are arranged sequentially along the length of the first sleeve body 2-1, with gaps between adjacent first limiting sleeves for installing and limiting other components, thereby achieving the purpose of making reasonable use of space and arranging components in an orderly manner. The size of the gaps can be determined according to the components that need to be installed and limited.

[0077] In one possible implementation, the first limiting sleeve 2-2 and the connecting sleeve 2-3 are fixedly connected to the first sleeve body 2-1. For example, by welding.

[0078] In addition, the connecting sleeve 2-3 is fixedly connected to the connecting body 1-1, thereby realizing the connection between the first sleeve assembly 2 and the gas circuit assembly 1.

[0079] In one specific embodiment, the first sleeve body 2-1 is a stainless steel pipe with a diameter of 5mm and a wall thickness of 0.8mm.

[0080] The second bushing assembly 3 is located downstream of the first bushing assembly 2 to achieve segmented protection. For example... Figure 4 As shown, it includes a second sleeve body 3-1 and a second limiting sleeve 3-2. The second sleeve body 3-1 is a hollow tube and is located outside the gas passage body 1-2 to protect the gas passage body 1-2 and the thermocouple 4. The second limiting sleeve 3-2 is a hollow tube and is fitted onto the outside of the second sleeve body 3-1 to limit the second sleeve body 3-1 to the cabin.

[0081] Specifically, the main body 3-1 of the second sleeve is a stainless steel pipe with a diameter of 4mm and a wall thickness of 0.3mm.

[0082] The second limiting sleeve 3-2 is a stainless steel tube with a diameter of 5mm and a wall thickness of 0.5mm.

[0083] In a preferred embodiment, such as Figure 5As shown, a weak portion 7 is arranged between the first sleeve assembly 2 and the second sleeve assembly 3 on the gas path main body 1-2, so as to facilitate the breakage and falling off of the pipeline after the completion of the corresponding functions. Specifically, the weak portion 7 is an annular groove arranged circumferentially along the outer surface of the gas path main body 1-2, that is, the wall thickness of the gas path main body 1-2 at the position where the weak portion is arranged is smaller than the wall thickness of the gas path main body 1-2 at the position where the weak portion is not arranged. For example, the wall thickness of the gas path main body 1-2 at the position where the weak portion is not arranged is 0.5 mm, and the wall thickness of the gas path main body 1-2 at the position where the weak portion is arranged is 0.2 mm, and the depth of the annular groove is 0.3 mm.

[0084] The thermocouple 4 is used for transmitting an electric signal, and a node for generating and sending an electric signal is arranged on the thermocouple 4, and an insulating portion is arranged outside the thermocouple 4. The thermocouple 4 is in a wire shape, and is preferably a platinum-rhodium wire. The node is arranged at the communication position of the first groove and the through hole, and is arranged in a suspended manner. The above arrangement has the advantage that the gas can enter the through hole and the gas path main body through the gap between the node and the connecting seat, and the ventilation function is realized.

[0085] In a possible manner, the thermocouple 4 located on both sides of the node is fixed in the two second grooves respectively, and the free end of the thermocouple 4 is connected with the electric connector 6. Exemplarily, the thermocouple 4 is fixed in the second groove by means of adhesion. The adhesive used can be J303 glue.

[0086] Specifically, the material of the insulating portion is alumina ceramic. The advantage of using alumina ceramic is that the application environment of the pipeline of the present application is a high-temperature environment, and alumina has good high-temperature resistance and will not be aged due to high temperature, and can have good insulation effect.

[0087] In a preferred manner, the insulating portion includes a plurality of insulating units, and the plurality of insulating units are arranged in sequence along the length direction of the thermocouple 4. The insulating portion is arranged in a segmented manner. The present embodiment realizes the segmented arrangement of the insulating portion by arranging the insulating portion to include a plurality of insulating units, which facilitates the subsequent bending and forming of the pipeline, and the insulating portion is not easily damaged in the bending and forming process. Exemplarily, the insulating unit is a hollow cylinder, the length is 5 mm, the inner diameter is 0.5 mm, and the outer diameter is 1 mm. The material of the insulating unit is alumina ceramic.

[0088] Since the frontmost end of the gas path assembly is in a high-temperature environment, the connecting seat at the frontmost end of the gas path assembly is made of a high-temperature-resistant alloy material, the gas path main body is made of stainless steel material, the circuit part uses a thermocouple (platinum-rhodium wire) to transmit an electric signal, and the end uses an electric connector to transmit an electric signal, so that the circuit part and the gas path part are required to be insulated during the pipeline design and manufacturing process, and at the same time, the components of the pipeline are required to have a limiting and positioning auxiliary function in a narrow cabin to meet the final use requirements.

[0089] In addition, the pipe with the dual functions of air passage and electricity passage in the embodiment further comprises a flow guide 9. The flow guide 9 is arranged at the end of the connecting body 1-1 with the first groove 1-4, and is used to guide the air flow into the through hole of the connecting body 1-1. As shown in Figure 7 The flow guide 9 comprises a flow guide body 9-1 and a flow guide cap 9-2 arranged at one end of the flow guide body 9-1.

[0090] The flow guide body 9-1 is in a cylindrical shape, and a flow guide hole 9-3 penetrating through the flow guide body 9-1 and the flow guide cap 9-2 is arranged on the flow guide body 9-1. The flow guide hole 9-3 is arranged in an axial direction and is a through hole. The flow guide hole 9-3 is internally provided with an internal thread, so as to realize the threaded connection with the connecting body 1-1. After the flow guide is installed on the connecting body 1-1, the end surface of the flow guide cap 9-2 is higher than the end surface of the connecting body 1-1 with the first groove, so as to form a flow guide channel. The air flow first enters the flow guide channel, and then is guided into the through hole of the connecting body 1-1.

[0091] Embodiment two

[0092] In another specific embodiment of the present application, a forming method of the air-electric dual function pipe is disclosed, which is used to form the pipe with the dual functions of air passage and electricity passage in the embodiment one.

[0093] Before forming the air-electric dual function pipe, each component, such as the connecting seat, the first sleeve assembly, the second sleeve assembly, etc., is first machined and formed. After each component is machined and formed, the entire air-electric dual function pipe is not formed integrally, but each component is assembled first, so as to ensure that each component can be smoothly assembled, and then the entire air-electric dual function pipe is formed integrally.

[0094] The machining of the connecting seat is described in the embodiment three, and the forming of the first sleeve assembly 2 and the second sleeve assembly 3 is described below.

[0095] The first sleeve assembly 2 is formed by the following method:

[0096] Step 1: the length of the first sleeve body 2-1 is calculated, and the blank is sawn and cut, and the flat end is deburred;

[0097] Step 2: a plurality of first limiting sleeves 2-2 are cut, and the blank is sawn and cut, and the flat end is deburred;

[0098] Step 3: the connecting sleeve 2-3 is machined and formed;

[0099] Step 4: the first sleeve body is marked, and the plurality of first limiting sleeves 2-2 and the first sleeve body 2-1 are welded as a whole by cold welding. When each first limiting sleeve is welded, only four points are welded from front to back and from top to bottom, and the welding is firm. The welding current is controlled to avoid the occurrence of welding bumps in the first sleeve body 2-1 during welding;

[0100] Step 5: The connecting sleeve is sleeved on one end of the first sleeve body and welded; the welding method is the same as step 4.

[0101] The second sleeve assembly 3 is formed by the following method:

[0102] Step 1: Calculate the length of the second sleeve body 3-1, saw cut the blank, and remove the burrs at the flat end.

[0103] Step 2: Cut the second limiting sleeve 3-2, and remove the burrs at the flat end.

[0104] Step 3: The second limiting sleeve 3-2 is sleeved on the second sleeve body 3-1 and welded; attention should be paid to the fact that the tube wall is too thin and is easy to be welded through, and a copper rod is needed inside.

[0105] The assembly method of the gas-electric dual-function pipeline includes the following steps:

[0106] Step 1: Connect the gas path body with the connecting seat to obtain a gas path assembly.

[0107] Step 2: The insulating part is sleeved on the outside of the thermocouple, and the thermocouple is fixed on the connecting seat. Specifically as follows:

[0108] Step 21: The node of the thermocouple is placed at the communication between the first groove and the through hole on the connecting body of the connecting seat, and is suspended;

[0109] Step 22: A plurality of insulating units are sequentially sleeved on the thermocouple, so as to realize sleeving the insulating part on the thermocouple;

[0110] Step 23: The thermocouple is fixed in the second groove on the connecting body.

[0111] Step 3: The sleeve assembly is sleeved on the outside of the gas path body and the thermocouple, specifically as follows:

[0112] Step 31: The first sleeve assembly is sleeved on the outside of the gas path body and the thermocouple;

[0113] Step 32: The second sleeve assembly is sleeved on the outside of the gas path body and the thermocouple, downstream of the first sleeve assembly.

[0114] Further, step 31 further includes: if there is a damaged insulating unit during sleeving the first sleeve assembly, the damaged insulating unit is removed, and the subsequent insulating units are arranged smoothly and then sleeved again.

[0115] Step 4: The gas path body is connected with the pipe mouth.

[0116] Step 5: The free end of the thermocouple is connected with the electric connector to obtain a gas-electric dual-function pipeline.

[0117] The forming method of the gas-electric dual-function pipeline of the embodiment comprises the following steps:

[0118] Step 1: insert one end of the gas path main body 1-2 into the welding slot of the connecting main body 1-1, and weld them together by argon arc welding to obtain a gas path assembly 1. When welding, a 10mm allowance is left between the gas path main body 1-2 and the connecting main body 1-1, which aims to meet the minimum pipeline size of the air passage and forming function.

[0119] Step 2: weld the other end of the gas path main body 1-2 with the connecting nozzle 5, and conduct a positive pressure air tightness test on the gas path assembly 1 to check the air tightness of the weld between the connecting main body 1-1 and the gas path main body 1-2. After the air tightness is qualified, the weld is checked for passability by 0.5mm iron wire to ensure that the through hole on the connecting main body after welding can pass air. Ensure that the through hole on the connecting main body after welding can pass air, remove the connecting nozzle 5 and the reserved allowance to ensure that the subsequent sleeve can be smoothly sleeved. If the air tightness is unqualified, find out the reason until the air tightness is qualified.

[0120] Step 3: fix the thermocouple.

[0121] Spray an insulating coating on the end face of the connecting main body 1-1 provided with the first groove 1-4, place the node of the thermocouple 4 at the communication between the first groove 1-4 and the through hole 1-3 on the connecting main body 1-1, and suspend the thermocouple 4, and then sleeve the insulating part on the thermocouple 4. Then, the thermocouple 4 is fixed in the first groove 1-4 and the second groove 1-5 by J303 adhesive. After the bonding is completed, the insulation of the thermocouple 4 and other metal parts of the pipeline is measured.

[0122] Step 4: after confirming the insulation of the thermocouple 4 and other metals of the pipeline, the first sleeve assembly 2 is sleeved outside the gas path main body 1-2 and the thermocouple 4. Specifically as follows:

[0123] Two people operate to straighten the thermocouple 4, and slowly sleeve the first sleeve assembly 2. If it is found that some insulating units outside the thermocouple 4 are damaged during the sleeving process, the first sleeve assembly 2 can be slowly removed, the damaged insulating units can be removed, and then the subsequent insulating units can be re-sleeved after being arranged smoothly. During the entire sleeving process, the thermocouple 4 cannot be bent or damaged. After the sleeving is completed, the resistance is measured to ensure the insulation of the thermocouple 4 and other metal parts of the pipeline. If it is not insulated, the first sleeve assembly 2 is removed and re-sleeved. After confirming the insulation, the first sleeve assembly 2 and the connecting main body 1-1 are welded, and the resistance is measured again after the welding is completed to confirm whether it is insulated. If it is not insulated, find out the reason until it is insulated.

[0124] Step 5: sleeve the second sleeve assembly 3 outside the gas path main body 1-2 and the thermocouple 4, the first sleeve assembly 2, and the connecting main body 1-1.

[0125] Downstream of pipe assembly 2. The precautions for fitting it in are the same as for fitting the first pipe assembly 2. After fitting, measure the resistance to ensure insulation between thermocouple 4 and the rest of the metal parts of the pipe. After confirming insulation, weld the second pipe assembly 3 to the connecting body 1-1. After welding, measure the resistance again to confirm insulation. If there is no insulation, find the cause until insulation is achieved.

[0126] Step 6: According to the design requirements, bend the first sleeve assembly 2 and the second sleeve assembly 3 into shape slowly and carefully. After bending, measure the resistance to ensure that the thermocouple 4 and the rest of the metal parts of the pipeline are insulated. Use J303 adhesive to bond and fix the first sleeve assembly 2 and the second sleeve assembly 3 together to obtain a pipeline with both pneumatic and electrical functions.

[0127] Step 7: Conduct an airtightness test on the pipeline with both pneumatic and electrical functions.

[0128] Since the thermocouple 4 is bonded to the second groove 1-5 of the connecting body 1-1 at this time, it is difficult to conduct a positive pressure airtightness test. In a preferred embodiment, all parts before the weld at the nozzle 5 can be inserted into the airtightness test piece, the opening is sealed with sealing putty, and the airtightness test is conducted by drawing a negative pressure. Specifically, the airtightness test piece can be a vacuum bag.

[0129] Step 8: Connect the free end of thermocouple 4 to electrical connector 6, measure the resistance, and ensure that thermocouple 4 and the rest of the metal parts of the pipeline are insulated.

[0130] Example 3

[0131] One specific embodiment of the present invention discloses a pipe connector, such as... Figure 2 As shown, the pipe connector includes a connector body 1-1 for ventilation and placement of thermocouples and a protrusion 1-7.

[0132] The structure of the connecting body 1-1 is the same as in Embodiment 1. The connecting body 1-1 is provided with an axial through hole 1-3. One end of the connecting body 1-1 is connected to the gas passage body 1-2, and the end face of the other end is provided with a first groove 1-4 for placing the thermocouple 4. The first groove 1-4 is in the shape of an "I" and its length is equal to the outer diameter of the connecting body 1-1. The through hole 1-3 communicates with the first groove 1-4.

[0133] In a preferred embodiment, the end face of the connecting body 1-1 with the first groove 1-4 is provided with an insulating coating to prevent the connecting body 1-1 from conducting with the thermocouple 4.

[0134] In addition, the connecting body 1-1 is provided with external threads for connection with other components (such as flow guides). The connecting body 1-1 is made of high-temperature resistant alloy material.

[0135] Further, a second groove 1-5 for placing the thermocouple 4 is arranged on the side of the connecting body 1-1, which is parallel to the axial direction of the connecting body 1-1 and extends from one end of the connecting body 1-1 to the other end. The second groove 1-5 is two in number and communicates with the first groove. The two second grooves are symmetrically arranged with respect to the through hole. The thermocouple 4 extends from the first groove 1-4 into the second groove 1-5, and then extends along the length direction of the gas path body 1-2 while being close to the gas path body 1-2 and located outside the gas path body 1-2.

[0136] The protrusion 1-7 is arranged on one end of the connecting body 1-1 and circumferentially arranged on the outer surface of the connecting body 1-1. The protrusion functions as a limiting part to prevent over-tightening. The end of the connecting body 1-1 provided with the protrusion 1-7 is connected with the gas path body 1-2.

[0137] In a possible implementation, the protrusion 1-7 is provided with a radial opening groove. The opening groove is used for the thermocouple to pass through and for the installation of the pipeline. Specifically, the opening groove includes a first opening groove 1-6 and a second opening groove. The number of the first opening groove 1-6 and the second opening groove is two. The two first opening grooves 1-6 and the two second opening grooves are alternately and uniformly distributed in the circumferential direction. The two first opening grooves 1-6 respectively communicate with the two second grooves to facilitate the thermocouple 4 to pass through. The two second opening grooves are used for the overall installation of the pipeline. Exemplarily, the protrusion 1-7 is a flange structure.

[0138] Embodiment Four

[0139] In another specific embodiment of the present application, a processing method of a connecting seat of a gas-electric dual-function pipeline is disclosed, which is used for processing the connecting seat of the embodiment one and includes the following steps:

[0140] Step 1: turning the outer shape of the connecting seat by a lathe, i.e. the connecting body and the protrusion on one end of the connecting body, and the external thread on the connecting body.

[0141] Step 2: processing the through hole on the connecting body.

[0142] The through hole on the connecting body is processed by an electric spark processing method with the other end of the connecting body (i.e. the end surface of the end not including the protrusion) as a reference.

[0143] Step 3: processing the second groove on both sides of the connecting body, the opening groove on the protrusion and the first groove on the connecting body, which specifically includes the following steps:

[0144] The same base as step 2 is adopted, i.e. still taking the end face of the other end of the connecting body (i.e. the end not including the protrusion) as the base, first, the second grooves on both sides of the connecting body and the two first opening slots on the protrusion are simultaneously machined by electric spark machining; second, the two second opening slots on the protrusion are machined by electric spark machining; and finally, the first groove on the connecting body is machined by electric spark machining.

[0145] The size tolerance of the first groove and the second groove needs to be strictly controlled during machining, so that the thermocouple with the sleeved insulation part (alumina ceramic) will not protrude from the groove after being placed in the groove.

[0146] Embodiment five

[0147] Since the weak part 7 is provided on the gas path body 1-2, the weak part is prone to breakage during subsequent turnover and machining. Based on the above consideration, the embodiment provides a protection tool 8 for protecting the weak part in the embodiment one.

[0148] As shown in Figure 6 , the protection tool includes a protection body 8-1 for accommodating the weak part 7 on the gas path body 1-2 and a pressing member 8-2 for fixing the gas path body 1-2 in the protection body 8-1 to achieve fixation of the weak part 7. The pressing member 8-2 is sleeved on the protection body 8-1.

[0149] Specifically, one end of the protection body 8-1 is closed, and a through slot 8-4 is provided on the protection body 8-1 in the radial direction of the protection body 8-1. One end of the gas path body 1-2 passes through the through slot 8-4 until the weak part 7 is located in the through slot 8-4.

[0150] Considering that the gas path body 1-2 is relatively long, if the end of the gas path body 1-2 needs to pass through the through slot to place the weak part in the through slot, the operation is inconvenient. Therefore, in a preferred embodiment, the through slot 8-4 extends from one end of the protection body 8-1 to the other end of the protection body 8-1, so that the other end of the protection body 8-1 is an open end. Since the through slot 8-4 extends from one end of the protection body 8-1 to the other end of the protection body 8-1, during use, it is not necessary to pass the end of the gas path body 1-2 through the through slot. It is only necessary to make the weak part 7 enter from the opening at the other end of the protection body 8-1 to achieve that the weak part 7 is located in the through slot 8-4, which greatly improves the convenience of operation.

[0151] In a possible embodiment, the pressing member 8-2 is provided with a through hole for the protection body to pass through. The pressing member 8-2 and the protection body 8-1 are threadedly connected. Exemplarily, the outer surface of the protection body is provided with external threads, and the through hole of the pressing member is provided with internal threads.

[0152] Preferably, the protection tool further comprises a locking piece 8-3. The locking piece 8-3 is arranged outside the pressing piece 8-2, close to the open end of the protection body 8-1, for preventing the pressing piece 8-2 from loosening, so as to prevent the weak part from moving out of the through slot 8-4 of the protection body 8-1. The locking piece 8-3 can have the same structure as the pressing piece, or can have other structures, as long as it can prevent the pressing piece from loosening.

[0153] In order to reduce the processing difficulty, the protection body 8-1 of the embodiment can adopt a bolt, and an axial through slot is formed by processing a through slot along the length direction of the bolt. The locking piece and the pressing piece can both adopt a nut.

[0154] Embodiment six

[0155] Another specific embodiment of the present application provides a processing method of an annular groove, which is used for processing the weak part of the gas-electric dual-function pipeline of the first embodiment.

[0156] The present embodiment adopts an electric spark processing mode to solve the problem that it is difficult to process an annular groove on an ultra-fine long and thin tubular part with high precision.

[0157] Specifically, the method comprises using a plurality of electric spark processing point positions of a tool electrode arranged circumferentially around the workpiece to process the annular groove on the workpiece surface.

[0158] Among them, the same electric spark processing point position comprises a working state and a non-working state, when the distance between the electric spark processing point position and the workpiece surface is greater than the threshold value, the electric spark processing point position is in the non-working state;

[0159] When the distance between the electric spark processing point position and the workpiece surface is less than or equal to the threshold value, the electric spark processing point position is in the working state;

[0160] Among them, the threshold value is the discharge distance between the electric spark processing point position and the workpiece surface that meets the processing requirement.

[0161] Among them, the discharge end 101 comprises a plurality of electric spark processing point positions arranged circumferentially around the workpiece, and the plurality of electric spark processing point positions arranged circumferentially around the workpiece can be continuously and uninterruptedly distributed circumferentially around the workpiece, or can be discontinuously distributed circumferentially around the workpiece, as long as it can realize the continuous processing and forming of the annular groove on the workpiece surface.

[0162] In one possible implementation, one end of the tool electrode 10 is annular, that is, the plurality of electric spark processing point positions arranged circumferentially around the workpiece form a continuous annular shape, as shown in Figures 8-13As shown, the inner circular end of the circular ring is matched with the shape of the annular groove, that is, the inner circular end is convex, and the annular groove is concave, and the cross-sectional size of the convex is the same as the cross-sectional shape of the concave; the other end of the tool electrode 10 is a conductive end 104, which is electrically connected with an output end of a power supply device arranged on a machine tool, so as to introduce current and transmit the current to the inner circular end; at this time, the inner circular end is a discharge end 101, so as to realize the machining of the annular groove on the machined surface through the working state of the plurality of circumferentially arranged electric spark machining points of the discharge end 101.

[0163] In a possible implementation, the discharge end 101 is a rigid structure, and the discharge end 101 is sleeved on the outer end surface of the gas path main body 1-2. Specifically, the gas path main body 1-2 is a stainless steel pipe. During machining, the stainless steel pipe is electrically connected with another output end of the power supply device, and the tool electrode 10 moves eccentrically around the inner cavity central axis of the stainless steel pipe; wherein, during the eccentric movement of the tool electrode 10, the distance between the inner circular end surface of the discharge end 101 and the machined end surface of the stainless steel pipe is constantly changing; when the distance between the electric spark machining point and the machined surface is greater than a threshold value, the electric spark machining point is in a non-working state, and at this time, the electric spark machining point is a non-working end 103; when the distance between the electric spark machining point and the machined surface is less than or equal to the threshold value, the electric spark machining point is in a working state, and at this time, the electric spark machining point is a working end 102; in this way, the working state and the non-working state of the same electric spark machining point are changed, and the working states of all the electric spark machining points together realize the machining of the annular groove on the machined surface, that is, the position of the working end 102 constantly changes in the inner circular end surface of the discharge end 101, and the circular discharge end of the tool electrode moves eccentrically around the inner cavity central axis of the stainless steel pipe for one revolution, and all the working ends form a continuous circular annular discharge end circumferentially around the machined part, so as to avoid the discharge end 101 of the tool electrode 10 in a continuous machining state, and further reduce the loss of the tool electrode 10.

[0164] Among them, the circular annular discharge end 101 of the tool electrode 10 includes a plurality of working ends 102 distributed in a ring shape, and the plurality of working ends 102 are in a non-synchronous and non-continuous machining state when the discharge end moves eccentrically around the inner cavity central axis of the stainless steel pipe for machining; and the machining tracks of the plurality of working ends together constitute the annular groove of the machined part.

[0165] Specifically, after the eccentric movement of the tool electrode 10 for one round, all the end faces of the discharge end 101 participate in the electric spark machining, that is, all the working ends 102 constitute the complete discharge end 101, and the machining tracks of all the working ends 102 constitute the annular groove of the stainless steel pipe; along the deflection movement direction of the tool electrode 10, the working ends 102 present a "circumferential movement" phenomenon on the discharge end 101, that is, the positions of the working ends 102 are different at different times, so that the machining of all the working ends 102 is realized alternately and orderly, and the machining direction 16 is the circumferential direction around the outer end face of the stainless steel pipe, and the plane where the circumferential direction is located is perpendicular to the central axis in the inner cavity of the stainless steel pipe.

[0166] In the formula, the judgment basis of whether the discharge end 101 is the working end 102 is whether the distance between the discharge end 101 and the machined surface of the stainless steel pipe is greater than 50 μm, if not, the discharge end 101 is the working end 102, if yes, the discharge end 101 is the non-working end 103.

[0167] Specifically, the tool electrode 10 is installed on the machine tool, and during machining, the machine tool drives the tool electrode 10 to make eccentric movement, so that the discharge end 101 of the tool electrode surrounds the end face of the stainless steel pipe to perform electric spark machining, and the machining direction 16 is the circumferential direction around the outer end face of the stainless steel pipe, and the central line of the circumferential direction coincides with the central axis in the inner cavity of the stainless steel pipe.

[0168] Specifically, before the eccentric movement of the tool electrode 10, the center of the inner circular end of the discharge end 101 of the tool electrode 10 needs to be adjusted to coincide with the central axis of the stainless steel pipe, and there is a clearance between the discharge end 101 and the outer end face of the stainless steel pipe, that is, the diameter of the inner circular end of the discharge end 101 is greater than the outer diameter of the stainless steel pipe, for example, the diameter of the inner circular end is 10-20 mm, which is 5-10 times of the outer diameter of the stainless steel pipe. In this way, the value of the single-sided feed amount O1O2 can be determined during electric spark machining.

[0169] In the formula, the single-sided feed amount O1O2 satisfies:

[0170] O1O2=S1+(H1-H2)-S2

[0171] In the formula, O1 represents the center point of the discharge end 101 of the tool electrode 10;

[0172] O2 represents the center point of the inner cavity of the stainless steel pipe;

[0173] H1 is the wall thickness of the stainless steel pipe;

[0174] H2 is the wall thickness of the annular groove;

[0175] S1 is the clearance between the discharge end 101 and the outer end face of the stainless steel pipe;

[0176] S2 is the machining gap, that is, the closest distance between the working end 102 and the end face of the stainless steel pipe 01 when the tool electrode 10 is eccentrically moved.

[0177] S1 satisfies:

[0178]

[0179] S1 satisfies: 11 , S 12 , S 13 , S 14 are the actual excess gap values between the four points selected on the discharge end 101 of the tool electrode 10 and the outer end face of the stainless steel pipe, and the four points are uniformly distributed on the discharge end 101.

[0180] For example, S 11 , S 12 , S 13 , S 14 are 2.055 mm, 2.060 mm, 2.065 mm, and 2.050 mm, respectively, and S1 = 2.058 mm.

[0181] S2 is the machining gap, that is, the closest distance between the working end 102 and the end face of the stainless steel pipe 01 when the tool electrode 10 is eccentrically moved.

[0182] For example, S2 = 10 μm; H1 = 0.5 mm, H2 = 0.3 mm, and S1 = 2.058 mm, and O1O2 = 2.248 mm.

[0183] S 11 , S 12 , S 13 , S 14 , wherein if the four values are equal, the center of the inner circular end of the discharge end 101 of the tool electrode 10 coincides with the central axis of the inner cavity of the stainless steel pipe.

[0184] S 11 , S 12 , S 13 , S 14 , wherein after the center of the discharge end 101 of the tool electrode 10 coincides with the central axis of the inner cavity of the stainless steel pipe by adjusting the machine tool, the closer the four values of S 11 , S 12 , S 13 , S 14 are, the more accurate the value of S1 is, and the more accurate the single-sided feed amount O1O2 is, so that the machining gap accuracy can be ensured during the eccentric movement of the tool electrode 10, and the machining depth of the working end 102 is ensured to ensure the size accuracy of the annular groove machined.

[0185] Specifically, after the center of the discharge end 101 of the tool electrode 10 coincides with the axis of the inner cavity of the stainless steel pipe, the tool electrode 10 is driven to perform eccentric motion by the machine tool, and the detailed process is as follows.

[0186] The movement trajectories of the center point O1 of the discharge end 101 of the tool electrode 10 and the center point O2 of the inner cavity of the stainless steel pipe are described as follows.

[0187] The tool electrode 10 is moved so that O1 is away from O2 by a distance of O1O2, and at this time, the distance between O1 and O2 is O1O2.

[0188] O1 is rotated around O2 with O1O2 as the radius, and at this time, the trajectory of O1 is a circle, as shown in Figure 14 , the center of the circle is O2, and the radius is O1O2.

[0189] During the movement of O1, when the closest distance between the end face of the discharge end 101 and the surface of the stainless steel pipe reaches 10 μm, the power supply device is started to deliver pulse voltage to the tool electrode 10 and the stainless steel pipe, and the surface metal of the stainless steel pipe is etched away at a machining speed of 0.04 g / min until the distance between O1 and O2 is O1O2, and then O1 performs circular motion around O2.

[0190] To further illustrate the movement trajectory of the tool electrode 10, an arbitrary point O3 on the discharge end 101 is selected, and the trajectory of O3 is described as follows.

[0191] The tool electrode 10 is moved so that O3 moves towards O2 by a distance of O1O2.

[0192] When O1 rotates around O2, at this time, as shown in Figure 15 , the trajectory of O3 is a circle with the initial position of O3 as the center and O1O2 as the radius.

[0193] During the movement of O3, when the closest distance between the end face of the discharge end 101 and the surface of the stainless steel pipe reaches 10 μm, the power supply device is started to deliver pulse voltage to the tool electrode 10 and the stainless steel pipe, and the surface metal of the stainless steel pipe is etched away at a machining speed of 0.04 g / min until the movement distance of O3 reaches O1O2, and then O3 performs circular motion with its initial position as the center.

[0194] In this way, in the eccentric movement of the tool electrode 10, the distance between the inner circular end face of the discharge end 101 and the outer end face of the stainless steel pipe is constantly changing, the distance between each part of the inner circular end face of the discharge end 101 and the outer end face of the stainless steel pipe is achieved from close to far, and then the discharge end 101 is changed from the working state to the non-working state, that is, the dynamic change between the working end 102 and the non-working end 103 is achieved.

[0195] The discharge end 101 and the outer end face of the stainless steel pipe 01 have a clearance gap, which ensures that the non-working end 103 at the discharge end 101 has a non-machining gap between the non-working end 103 and the end face of the stainless steel pipe, and then ensures that the pulse voltage released at the non-working end 103 cannot etch the metal on the surface of the stainless steel pipe. In this way, when the tool electrode 10 is eccentrically moved, the dynamic change between the working end 102 and the non-working end 103 can be achieved.

[0196] The conductive end 104 of the tool electrode 10 is electrically connected to an output end of a power supply device provided on the machine tool, and the stainless steel pipe is electrically connected to another output end of the power supply device. The power supply device includes a pulse power supply, and the two output ends are respectively connected to the positive and negative electrodes of the pulse power supply to output a pulse voltage.

[0197] During machining, the discharge end 101 of the tool electrode 10 and the stainless steel pipe are immersed in a liquid medium with a certain degree of insulation. For example, the medium is kerosene, mineral oil or deionized water. When the pulse voltage is applied to the discharge end 101 and the stainless steel pipe, the liquid medium at the closest point between the stainless steel pipe and the discharge end 101 at that time is broken down to form a discharge channel. Because the cross-sectional area of the channel is very small, the discharge time is very short, so that the energy is highly concentrated (10-10 6 W / mm), and the instantaneous high temperature generated in the discharge area is sufficient to melt or even evaporate the metal on the surface of the stainless steel pipe, so as to form a small pit. After the first pulse discharge ends, a second pulse breaks down the discharge at another closest point after a very short interval. In this way, the tool electrode 10 continuously feeds the stainless steel pipe, and its shape is finally replicated on the stainless steel pipe to form the required machined surface. During machining, although a small part of the total energy is also released to the tool electrode 10, causing the tool electrode 10 to be worn, by the eccentric movement of the discharge end 101 of the tool electrode 10 around the central axis of the inner cavity of the stainless steel pipe, the working end 102 at the discharge end 101 is constantly changing position. In this way, by avoiding continuous machining of the working end 102, the wear of the tool electrode 10 is reduced, and then the working end 102 of the discharge end 101 maintains a relatively complete shape at each moment of machining, improving the machining precision.

[0198] For example, during machining, the electrical parameters satisfy:

[0199] The pulse width is 30-60μs, the pulse interval is 20-30μs, the average machining current is 0.8-2A, and the average machining voltage is 30-60V.

[0200] Specifically, during machining, the tool electrode 10 is controlled to eccentrically move by the machine tool, and the stainless steel pipe is kept stationary.

[0201] The tool electrode 10 is connected with a driving device arranged on the machine tool, and the driving device comprises a transmission rod 15. During machining, the machine tool controls the transmission rod 15 to swing, and the tool electrode 10 is driven to eccentrically move by the transmission rod 15.

[0202] Specifically, the transmission rod 15 swings clockwise in a swing plane ZY which is parallel to the plane where the discharge end 101 is located, so that the tool electrode 10 is eccentrically moved around the central axis of the inner cavity of the stainless steel pipe.

[0203] For example, during machining, the non-electric parameters satisfy:

[0204] The swing speed of the transmission rod 15 is 0.4-0.6rpm, the machining gap is 10-50μm, the machining speed is 0.02-0.045g / min, and the single-side feeding amount is 2.214-2.316mm.

[0205] Specifically, as shown in Figure 16 , the stainless steel pipe is clamped by being placed on the equal-height positioning blocks 12 and the auxiliary bearing blocks 13.

[0206] The two equal-height positioning blocks 12 are used to clamp the two sides of the to-be-machined position of the stainless steel pipe, so as to ensure the stability of the to-be-machined position of the stainless steel pipe during machining. For example, the distance between the two equal-height positioning blocks 12 is 30mm.

[0207] The two equal-height positioning blocks 12 are placed between the two auxiliary bearing blocks 13, and the two auxiliary bearing blocks 13 are used to support and position the two ends of the stainless steel pipe, so as to further ensure the stability of the stainless steel pipe during machining.

[0208] As shown in Figures 18-19 , the upper end faces of the equal-height positioning blocks 12 and the auxiliary bearing blocks 13 are flush, and the upper end faces of the equal-height positioning blocks 12 and the auxiliary bearing blocks 13 are provided with V-shaped grooves, and the stainless steel pipe is placed in the V-shaped grooves to limit the stainless steel pipe.

[0209] Further, the clamping plate 14 is covered on the V-shaped grooves and is clamped on the equal-height positioning blocks 12 to limit the stainless steel pipe and further improve the stability of the stainless steel pipe. For example, the angle of the V-shaped groove is 60°-90°, and the depth is 5-10mm.

[0210] Wherein, before placing the stainless steel pipe on the equal-height positioning block 12, first need to use the machine tool to find the tool electrode 10, and then put the stainless steel pipe into the discharge end 101 of the tool electrode 10, and finally use the equal-height positioning block 12, the auxiliary bearing block 13 and the clamping plate 14 to clamp the stainless steel pipe, and find the stainless steel pipe through the equal-height positioning block 12 and the auxiliary bearing block 13.

[0211] Specifically, after the tool electrode 10 is found, the positions of the equal-height positioning block 12 and the auxiliary bearing block 13 on the machine tool are adjusted by the machine tool XYZ axis to find the stainless steel pipe, so as to ensure that the inner cavity axis of the stainless steel pipe coincides with the center line of the discharge end 101 of the tool electrode 10, so as to determine the value of the single-sided feed amount O1O2, and further improve the machining precision.

[0212] Wherein, the finding process of the stainless steel pipe is as follows.

[0213] First, first fix the two equal-height positioning blocks 12 and the two auxiliary bearing blocks 13 on the workbench 9 of the machine tool, and then use the dial indicator to find the parallelism of the side surface with the machine tool X axis, and the parallelism error is ≤0.01mm.

[0214] Before placing the stainless steel pipe on the equal-height positioning block 12, first put the stainless steel pipe into the discharge end 101 of the tool electrode 10, and then place the stainless steel pipe on the equal-height positioning block 12 and the auxiliary bearing block 13, so as to find the stainless steel pipe through the equal-height positioning block 12 and the auxiliary bearing block 13.

[0215] Wherein, one end of the transmission rod 15 is connected with the tool electrode 10, and is parallel to the center line of the discharge end 101 of the tool electrode 10; during the machining process, the other end of the transmission rod 15 is installed on the machine tool, so as to drive the transmission rod 15 to swing through the machine tool, and then drive the tool electrode 10 to move through the transmission rod 15, so as to realize the eccentric motion of the discharge end 101 of the tool electrode 10 around the inner cavity axis of the stainless steel pipe.

[0216] In this way, the discharge end 101 of the tool electrode 10 eccentrically moves around the inner cavity axis of the stainless steel pipe for one cycle, so as to complete the machining of the annular groove of the stainless steel pipe, realize one-time machining, and significantly improve the machining efficiency.

[0217] Compared with the prior art, the discharge end 101 of the tool electrode 10 of the present application comprises a plurality of electric spark machining point positions arranged circumferentially around the workpiece to be machined, the same electric spark machining point position comprises a working state and a non-working state, and when the tool electrode is electric spark machining on the annular groove of the workpiece to be machined, the distance between the electric spark machining point position and the machined surface is constantly changing, so that the working state and the non-working state are changed, and the working state of the plurality of electric spark machining point positions arranged circumferentially around the workpiece to be machined realizes the machining of the annular groove on the machined surface, so that the discharge end 101 of the tool electrode 10 is avoided to be in a continuous machining state, and the wear of the tool electrode 10 is reduced.

[0218] The plurality of electric spark machining point positions arranged circumferentially around the workpiece to be machined form a continuous circular ring, the inner circular end of the circular ring matches the shape of the annular groove, and the circular ring is eccentrically moved on the outer end surface of the stainless steel pipe, and in this process, the distance between the inner circular end surface of the discharge end 101 and the machined surface is constantly changing; when the inner circular end surface of the discharge end 101 is close to the machined surface, the end surface of the discharge end 101 is the working end 102, and when the end surface is away from the machined surface, the end surface changes to the non-working end 103, so that the dynamic change between the working end 102 and the non-working end 103 is realized, the working end 102 of the tool electrode 10 is avoided to be in a continuous machining state, the wear of the working end 102 of the tool electrode 10 is greatly reduced, the wear of the tool electrode 10 is less than or equal to 1%, and the deformation of the working end surface of the tool electrode 10 is reduced, so that the machining precision of the annular groove of the stainless steel pipe is improved.

[0219] The discharge end 101 of the tool electrode 10 of the present application is eccentrically moved on the super-fine long stainless steel pipe, and during machining, the distance between the discharge end 101 and the super-fine long stainless steel pipe changes from large to small, and then from small to large, in the process of changing from large to small, metal scraps are generated between the discharge end 101 and the stainless steel pipe, at this time, part of the metal scraps are discharged through the machining gap with the working fluid, and in the process of changing from small to large, the distance between the discharge end 101 and the stainless steel pipe can be increased by nearly 200 times, which significantly improves the efficiency of discharging metal scraps, so that the metal scraps are avoided to be accumulated at the discharge end 101 due to the discharging not in time, thereby reducing the wear of the tool electrode 10, and avoiding the risk of short circuit caused by the direct connection of the tool electrode 10 with the stainless steel pipe through the metal scraps.

[0220] By eccentrically moving the discharge end 101 of the tool electrode 10 on the super-fine long stainless steel pipe, the metal scraps can be efficiently discharged, and the electric spark machining with a smaller machining gap is realized, so that the machining current and the machining voltage value can be reduced, the machining cost is reduced, and the annular groove with a lower surface roughness can be obtained.

[0221] As Figure 17As shown, by adjusting the value of the single-sided feed amount, the annular grooves of different wall thicknesses can be machined, and by adjusting the shape of the discharge end 101 of the tool electrode 10, the dimensions of different bevel angles a can be machined, laying a foundation for rapid production and batch production of products.

[0222] The discharge end 101 of the tool electrode 10 of the present application moves eccentrically around the central axis of the inner cavity of the ultra-slim stainless steel pipe for one cycle, thereby completing the machining of the annular groove of the ultra-slim stainless steel pipe, achieving one-time machining, and significantly improving the machining efficiency.

[0223] By eccentric movement of the discharge end 101 of the tool electrode 10 around the central axis of the inner cavity of the stainless steel pipe, the single-sided feed amount of each end face of the discharge end 101 is the same, ensuring the consistency of the machining depth of the annular groove, thereby improving the machining precision of the annular groove.

[0224] The discharge end 101 of the tool electrode 10 has the same shape as the annular groove, i.e., the discharge end 101 is convex, and the annular groove is concave. The cross-sectional dimension of the convex shape is the same as the cross-sectional shape of the concave shape. Therefore, after the discharge end 101 of the tool electrode 10 moves eccentrically around the central axis of the inner cavity of the ultra-slim stainless steel pipe for one cycle, the depth and bevel angle of the machined annular groove are the required annular groove depth and bevel angle, and the machining precision is significantly improved.

[0225] The present application discards the traditional turning machining method of the ultra-slim stainless steel pipe, and uses the working end 102 of the tool electrode 10 to discharge and remove the metal on the surface of the ultra-slim stainless steel pipe to machine the annular groove. That is, during the machining process, the tool electrode 10 does not contact the surface of the ultra-slim stainless steel pipe, and does not cause deformation of the ultra-slim stainless steel pipe, overcoming the problem of damage to the ultra-slim stainless steel pipe caused by cutting force.

[0226] The present application uses the eccentric movement of the discharge end 101 of the tool electrode 10 around the central axis of the inner cavity of the ultra-slim stainless steel pipe to machine the annular groove of the ultra-slim stainless steel pipe. That is, during the machining process, the ultra-slim stainless steel pipe does not need to be moved, and the annular groove can be machined on the outer surface of the ultra-slim stainless steel pipe, overcoming the problem of poor coaxiality during the rotation of the ultra-slim stainless steel pipe, which affects the machining precision.

[0227] During machining, the ultra-slim stainless steel pipe is only placed in the V-shaped groove on the equal-height positioning block 12 and the auxiliary bearing block 13, and the upper surface of the ultra-slim stainless steel pipe is limited by the clamping plate 14, so that the clamping and positioning of the ultra-slim stainless steel pipe can be realized. The clamping is convenient, and the stability of the ultra-slim stainless steel pipe during machining can be ensured.

[0228] The specific steps are as follows:

[0229] Step 1: Adjust the position of the tool electrode 10 by using the machine tool, so that the plane where the discharge end 101 of the tool electrode 10 is located is perpendicular to the worktable surface 11 of the machine tool;

[0230] Specifically, the worktable surface 11 of the machine tool is a horizontal plane, and the tool electrode 10 is vertically installed on the machine tool and connected with a transmission rod installed on the machine tool.

[0231] Step 2: Use the bearing assembly to clamp the gas path body 1-2 and align the gas path body 1-2.

[0232] Specifically, the gas path body 1-2 is a stainless steel pipe. First, fix two pieces of equal-height positioning blocks 12 and two pieces of auxiliary bearing blocks 13 on the worktable surface 11, and use a dial indicator to align the side surface parallel to the X-axis of the machine tool, and use the machine tool to adjust the position of the equal-height positioning blocks 12 and the auxiliary bearing blocks 13, wherein the parallelism error is ≤0.01mm.

[0233] Then place the stainless steel pipe on the equal-height positioning blocks 12, and before placing, first pass the stainless steel pipe through the inner circle end of the lower end of the tool electrode 10, and ensure that the stainless steel pipe is in a horizontal position through the equal-height positioning blocks 12, and the distance between the two equal-height positioning blocks 12 is 30mm.

[0234] Then place the two ends of the stainless steel pipe on the auxiliary bearing blocks 13, and finally fix it with a clamping plate 14.

[0235] Step 3: Adjust the center line of the discharge end 101 of the tool electrode 10 to coincide with the central axis of the inner cavity of the stainless steel pipe by using the machine tool.

[0236] Specifically, first, adjust the position of the stainless steel pipe by moving the bearing assembly in the X-axis direction by using the machine tool, so that the to-be-processed position of the stainless steel 6 is located in the discharge end 101 of the tool electrode 10.

[0237] Then, by using the automatic centering module of the machine tool, measure the values of S 11 , S 12 , S 13 , S 14 If the four values are equal or the error is within ±0.02mm, the center of the discharge end 101 of the tool electrode 10 coincides with the central axis of the inner cavity of the stainless steel pipe, if not, continue to adjust the position of the bearing assembly by using the machine tool until the requirements are met.

[0238] Step 4: Use kerosene and water as working fluid, and use the tool electrode 10 to perform electric spark machining on the stainless steel pipe.

[0239] Specifically, step 4 includes the following steps:

[0240] Step 41: eccentrically moving the discharge end 101 of the tool electrode 10 around the central axis of the inner cavity of the stainless steel pipe;

[0241] Specifically, the machine tool swings the transmission rod 15 in the YZ plane, and then controls the discharge end 101 of the tool electrode 10 to eccentrically move around the central axis of the inner cavity of the stainless steel pipe through the transmission rod 15. The eccentric movement direction 17 is shown in Figure 14 .

[0242] The swing speed of the transmission rod 15 is 0.5 rpm;

[0243] S 11 、S 12 、S 13 、S 14 The actual measured values are 2.055 mm, 2.060 mm, 2.065 mm, and 2.050 mm, and at this time, S1=2.058 mm;

[0244] The processing gap S2 is 10 μm;

[0245] The single-sided feed amount O1O2=S1+(H1-H2)-S2=2.058+(0.5-0.3)-0.01=2.248 mm;

[0246] The processing speed is 0.04 g / min.

[0247] Step 42: when the tool electrode 10 is eccentrically moved, the tool electrode 10 is powered to perform electric spark machining.

[0248] Specifically, the electrical parameters satisfy:

[0249] The pulse width is 40 μs, the pulse interval is 26 μs, the average processing current is 1 A, and the average processing voltage is 40 V.

[0250] The above processing method is used to process the annular grooves of #01-#10 ultra-fine long stainless steel pipes, and the processing parameters are shown in Table 1.

[0251] Table 1 Processing parameters

[0252]

[0253] Processing requirements: the wall thickness of the annular groove is 0.3±0.05 mm, and the bevel angle α is 90°.

[0254] The detection results are shown in Table 2.

[0255] Table 2 Detection results

[0256]

[0257] Wherein, the electrode consumption ratio is E / W*100%, wherein, E is the diameter size variation of the discharge end of the tool electrode, and W is the initial diameter size of the inner end of the tool electrode.

[0258] As shown in Table 2, the average value of the groove depth of the annular grooves of the 10 pieces of stainless steel pipes processed by the present application is 0.2146mm, the standard deviation is 0.01427, the dispersion coefficient is 0.07, the annular groove angle is 90°, the average value of the annular groove wall thickness is 0.299mm, the standard deviation is 0.006681, and the dispersion coefficient is 0.02. It can be seen that the processing method of the present application can realize the annular groove processing of the ultra-fine long stainless steel pipe, and the processed annular groove has high precision and stability, and will not damage the ultra-fine long stainless steel pipe, and the tool electrode has small loss.

[0259] Generally, the ratio of diameter to length reaches 1:100-150, which belongs to the ultra-fine long shaft. For example, the outer diameter of the stainless steel pipe used in a certain aviation product is 2mm, the inner diameter is 1mm, and the length is 1-1.2m. The ratio of the outer diameter to the length of the stainless steel pipe is 1:500-600, which belongs to the ultra-fine long stainless steel pipe. Generally, an annular groove needs to be processed on the ultra-fine long steel pipe. The annular groove is an annular groove, which is used to separate the product fairing body from the product guidance system when the product reaches the predetermined height and position.

[0260] Due to the small diameter and thin wall thickness of the ultra-fine stainless steel pipe, and the wall thickness of the annular groove position is even thinner, such as 0.3±0.05mm, the important dimensions cannot be obtained by direct measurement. When a V-shaped annular groove is processed at a certain position of the ultra-fine long stainless steel pipe, it is difficult to ensure the wall thickness size of the annular groove position by using the traditional turning processing method. This is because the longer the length, the greater the centrifugal force caused by the rotation of the workpiece, and the worse the coaxiality of the workpiece. In addition, the cutting force generated is easy to cause deformation of the ultra-fine long stainless steel pipe.

[0261] If the existing electric spark processing device is used to process the annular groove of the ultra-fine long stainless steel pipe, the ultra-fine long stainless steel pipe needs to be rotated, and then the tool electrode is used to continuously advance on the surface of the ultra-fine long stainless steel pipe for processing. However, due to the long length of the ultra-fine long stainless steel pipe, the centrifugal force caused by the rotation of the workpiece will be greater, and the coaxiality of the workpiece will be worse, which will also make it difficult to ensure the wall thickness size of the annular groove position. In addition, part of the total energy is released to the tool electrode during processing, which will cause tool loss. The shape of the lost tool electrode is finally replicated on the ultra-fine long stainless steel pipe, which seriously affects the processing precision of the annular groove.

[0262] The wall thickness of the annular groove position is thin, the positioning requirement and the machining precision requirement are relatively high, and the important dimension cannot be obtained by direct measurement; when the annular groove is machined at a certain position of the ultra-fine long stainless steel pipe, it is difficult to guarantee the wall thickness dimension of the annular groove position by using the traditional turning machining device, and even if the existing electric spark machining device is used, it is also difficult to guarantee the wall thickness dimension of the annular groove position.

[0263] The annular groove is machined by the following machining device. The machining device comprises a tool electrode 10, a bearing assembly and a driving assembly installed on a machine tool, wherein the bearing assembly is used for clamping the stainless steel pipe, and the driving assembly is used for driving the tool electrode 10 to eccentrically move around the central axis of the inner cavity of the stainless steel pipe, so as to realize electric spark machining of the annular groove of the stainless steel pipe, thereby solving the problem that the annular groove is difficult to be machined on the ultra-fine long stainless steel pipe.

[0264] Specifically, one end of the tool electrode 10 is in the form of a circular ring, the inner circle end of the circular ring matches the shape of the annular groove, the other end of the tool electrode 10 is a conductive end 104, and the conductive end 104 is electrically connected with an output end of a power supply device arranged on the machine tool, so as to introduce current and transmit the current to the inner circle end. At this time, the inner circle end is a discharge end 101, and the discharge end 101 is sleeved on the outer end surface of the stainless steel pipe. During machining, the stainless steel pipe is electrically connected with another output end of the power supply device, and the discharge end 101 of the tool electrode 10 eccentrically moves around the central axis of the inner cavity of the stainless steel pipe. During the eccentric movement of the tool electrode 10, the distance between the end surface of the discharge end 101 and the end surface of the stainless steel pipe to be machined is constantly changing. When the distance is 10-50 μm, it is in working state, that is, working end 102, and when the distance is greater than 50 μm, it is in non-working state, that is, non-working end 103. The machining tracks of all working ends 102 together constitute the annular groove of the ultra-fine long stainless steel pipe.

[0265] The center of the inner circle end of the discharge end 101 of the tool electrode 10 coincides with the central axis of the inner cavity of the stainless steel pipe, and there is a clearance between the discharge end 101 and the outer end surface of the stainless steel pipe. The diameter of the end surface of the discharge end 101 is 20 mm, which is 10 times the outer diameter of the stainless steel pipe, so as to facilitate the determination of the value of the single-sided feed amount O1O2. During machining, the tool electrode 10 is swung by the driving assembly, and at this time, the discharge end 101 of the tool electrode 10 is in the eccentric movement state around the central axis of the inner cavity of the stainless steel pipe.

[0266] The automatic centering module on the machine tool is used to measure S 11 , S 12 , S 13 , S 14 are respectively 2.055 mm, 2.060 mm, 2.065 mm and 2.050 mm. At this time, S1=2.058 mm.

[0267] Wherein, S2=10μm; H1=0.5mm, H2=0.3mm, S1=2.058mm, at this time, O1O2=2.248mm.

[0268] Wherein, after the center of the discharge end 101 of the tool electrode 10 is adjusted to coincide with the inner cavity axis of the stainless steel pipe, the tool electrode 10 is in eccentric motion state under the action of the driving assembly.

[0269] Wherein, the conductive end 104 of the tool electrode 10 is electrically connected with an output end of the power supply device arranged on the machine tool, and the stainless steel pipe is electrically connected with another output end of the power supply device, wherein the power supply device includes a pulse power source, and the two output ends are respectively connected with the positive and negative poles of the pulse power source to output pulse voltage.

[0270] Wherein, during the machining process, the electrical parameters satisfy:

[0271] The pulse width is 40μs, the pulse interval is 26μs, the average machining current is 1A, and the average machining voltage is 40V.

[0272] Specifically, the above-mentioned driving assembly includes a transmission rod 15, one end of the transmission rod 15 is connected with the tool electrode 10, and the other end of the transmission rod 15 is installed on the machine tool, and the transmission rod 15 can be controlled to swing through the machine tool, so as to drive the discharge end 101 of the tool electrode 10 to make eccentric motion around the inner cavity axis of the stainless steel pipe. Wherein, the stainless steel pipe remains stationary during machining.

[0273] Wherein, during the machining process, the non-electrical parameters satisfy:

[0274] The swing speed of the transmission rod 15 is 0.5rpm, the machining gap S2 is 10μm, the machining speed is 0.04g / min, and the single-sided feed amount O1O2 is 2.248mm.

[0275] Specifically, the bearing assembly includes an equal-height positioning block 12 and an auxiliary bearing block 13 installed on the machine tool, so as to place the stainless steel pipe on the equal-height positioning block 12 and the auxiliary bearing block 13 to clamp the stainless steel pipe.

[0276] Wherein, two equal-height positioning blocks 12 are provided, and the two equal-height positioning blocks 12 are respectively located on both sides of the to-be-machined position of the stainless steel pipe, and the distance between the two equal-height positioning blocks 12 is 30mm.

[0277] Wherein, two auxiliary bearing blocks 13 are provided, and the two equal-height positioning blocks 12 are located between the two auxiliary bearing blocks 13, so as to support and position the two ends of the stainless steel pipe through the two auxiliary bearing blocks 13.

[0278] The upper end faces of the equal-height positioning block 12 and the auxiliary bearing block 13 are flush, and the upper end faces of the equal-height positioning block 12 and the auxiliary bearing block 13 are provided with V-shaped grooves, and the stainless steel pipe is placed in the V-shaped grooves to limit the stainless steel pipe.

[0279] Further, the equal-height positioning block 12 is further provided with a clamping plate 14, the clamping plate 14 covers the V-shaped groove and is clamped on the equal-height positioning block 12 to limit the stainless steel pipe and further improve the stability of the stainless steel pipe.

[0280] Wherein, before placing the stainless steel pipe on the equal-height positioning block 12, first need to find the tool electrode 10, and then the stainless steel pipe is inserted into the discharge end 101 of the tool electrode 10, and finally the equal-height positioning block 12, the auxiliary bearing block 13 and the clamping plate 14 are used to clamp the stainless steel pipe, and the stainless steel pipe is found by the equal-height positioning block 12 and the auxiliary bearing block 13.

[0281] Wherein, one end of the transmission rod 15 is connected with the tool electrode 10, and is parallel to the center line of the discharge end 101 of the tool electrode 10; in the process of machining, the other end of the transmission rod 15 is installed on the machine tool, so that the machine tool drives the transmission rod 15 to swing, and then the tool electrode 10 is driven by the transmission rod 15 to move, so that the discharge end 101 of the tool electrode 10 moves eccentrically around the central axis of the inner cavity of the stainless steel pipe.

[0282] In this way, the discharge end 101 of the tool electrode 10 moves eccentrically around the central axis of the inner cavity of the stainless steel pipe for one cycle, and the machining of the annular groove of the stainless steel pipe is completed, which realizes one-time machining and significantly improves the machining efficiency.

[0283] Those skilled in the art can understand that all or part of the processes of the above-mentioned embodiments can be completed by a computer program instructing related hardware, and the program can be stored in a computer readable storage medium, such as a magnetic disk, an optical disk, a read-only memory or a random access memory.

[0284] The present application provides a new pipe structure capable of meeting the functions of ventilation and sending electric signals by analyzing the narrow space and the corresponding functional requirements, and selecting a plurality of small-diameter stainless steel pipes to form the pipe body and the sleeve assembly, which can meet the minimum space and positioning requirements, and the selected thermocouple wire structure can meet the insulation requirements, and the novel and reasonable setting of the corresponding pipe welding, sleeve and bending steps, as well as the insulation detection for each step, can effectively form the pipe shape and simultaneously ensure the insulation performance of the parts, achieving the two functions of ventilation and sending electric signals of the pipe.

[0285] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An assembly method of a multi-functional duct for satisfying dual requirements of ventilation and power supply in a narrow cabin of an aerospace vehicle, characterized in that, The method comprises the following steps: Step 1: connecting the gas path main body with the connecting seat to obtain a gas path assembly; Step 2: sleeving the insulation part on the outside of the thermocouple and fixing the thermocouple on the connecting seat; Step 3: sleeving the sleeve assembly on the outside of the gas path main body and the thermocouple; Step 4: connecting the gas path main body with the pipe nozzle; Step 5: connecting the free end of the thermocouple with the electric connector to obtain a multifunctional pipeline. The step 2 comprises the following steps: Step 21: placing the node of the thermocouple at the communication position between the first groove and the axial through hole on the end face of one end of the connecting main body of the connecting seat and suspending the node; Step 22: sleeving the insulation part on the thermocouple; Step 23: fixing the thermocouple in the second groove on the side surface of the connecting main body. The sleeve assembly is used for protecting the gas path main body and the thermocouple and positioning and limiting the gas-electric multifunctional pipeline on the cabin body.

2. The method of assembling a multifunctional tube according to claim 1, wherein The step 22 comprises sleeving a plurality of insulation units on the thermocouple in sequence.

3. The method of assembling a multifunctional tube according to claim 2, wherein The step 3 comprises the following steps: Step 31: sleeving the first sleeve assembly on the outside of the gas path main body and the thermocouple; Step 32: sleeving the second sleeve assembly on the outside of the gas path main body and the thermocouple downstream of the first sleeve assembly.

4. The method of assembling a multifunctional tube according to claim 3, wherein The step 31 further comprises: if there is a damaged insulation unit during sleeving of the first sleeve assembly, removing the damaged insulation unit and sleeving the following insulation units again after the following insulation units are arranged smoothly.

5. The method of assembling a multifunctional tube of claim 1, wherein, The material of the insulation part is alumina ceramic.

6. The method of assembling a multifunctional tube of claim 2, wherein, The insulation unit is a hollow cylinder.

7. The method of assembling a multifunctional tube according to claim 6, wherein The length of the insulation unit is 5 mm, the inner diameter is 0.5 mm and the outer diameter is 1 mm.

8. The method of assembling a multifunctional tube of claim 1, wherein, The thermocouple is a platinum rhodium wire.

9. A multifunctional tube, characterized by The multifunctional pipeline is obtained by assembling the assembling method of any one of claims 1-8 and comprises a gas path assembly, a thermocouple, a first sleeve assembly, a second sleeve assembly, a pipe nozzle and an electric connector. The gas path assembly is connected with the pipe nozzle and is used for realizing ventilation of the pipeline; the thermocouple is fixed in the second groove of the gas path assembly and the free end of the thermocouple is connected with the electric connector and is used for realizing electric signal of the pipeline; The gas path assembly comprises a connecting seat and a gas path main body, and the first sleeve assembly and the second sleeve assembly are both sleeved on the outside of the gas path main body.

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