The utility model discloses a kind of gas-electric dual-function pipeline protection frock and gas-electric dual-function pipeline

Abstract

The present application relates to a kind of gas-electric dual-function pipeline protection frock and gas-electric dual-function pipeline, belong to composite precision forming technical field, solve the problem that there is no frock for the weak part of gas-electric dual-function pipeline in prior art.The gas-electric dual-function pipeline protection frock includes protection main body and pressing part;The protection main body is used to accommodate protection object, and the pressing part is used to fix the protection object in the protection main body, to realize the fixation of the protection object;One end of the protection main body is closed, and is provided with radial through slot, to place the protection object in the through slot;The pressing part is set on the protection main body.The present application realizes the diversification of pipeline function, and a pipeline has both air function and electric function.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of precision forming, and particularly relates to a gas-electric dual-function pipeline protection tool and a gas-electric dual-function pipeline. BACKGROUND

[0002] With the development of aerospace technology, miniaturization and structural weight reduction become more and more important, and the cabin space becomes more and more narrow, so it is required to prepare a pipeline with dual functions of outputting an electric signal and having a ventilation capacity in a narrow space.

[0003] The existing pipeline has a single function, and a ventilation pipeline and an electric signal pipeline are arranged separately, which cannot meet the use requirement in a narrow cabin. And there is no tool for protecting the weak part of the gas-electric dual-function pipeline in the prior art. SUMMARY

[0004] In view of the above analysis, the present application aims to provide a gas-electric dual-function pipeline protection tool and a gas-electric dual-function pipeline, so as to solve the problem that there is no tool for protecting the weak part of the gas-electric dual-function pipeline in the prior art.

[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 gas-electric dual-function pipeline protection tool, which comprises a protection main body and a compression part; the protection main body is used for accommodating a protection object, and the compression part is used for fixing the protection object in the protection main body to realize the fixation of the protection object; one end of the protection main body is closed, and a through slot is arranged on the protection main body in the radial direction of the protection main body, so as to place the protection object in the through slot; and the compression part is sleeved on the protection main body.

[0007] Optionally, the through slot extends from one end of the protection main body to the other end, so that the other end of the protection main body is an open end.

[0008] Optionally, the protection object is a weak part arranged on a gas path main body of a gas-electric dual-function pipeline.

[0009] Optionally, a through hole is arranged on the compression part for the protection main body to pass through, and the compression part and the protection main body are threadedly connected.

[0010] Optionally, a loosening prevention part is further arranged, the loosening prevention part is used for preventing the compression part from loosening, so as to prevent the protection object from moving out of the through slot; and the loosening prevention part is arranged on the outer side of the compression part and close to the open end of the protection main body.

[0011] Optionally, the structure of the loosening prevention part is the same as that of the compression part.

[0012] Optionally, the protection body is obtained after a through slot is processed on the shank of the bolt.

[0013] Optionally, the pressing member is a nut.

[0014] In another aspect, the application also provides a gas-electric dual-function pipeline, comprising a gas path assembly, a thermocouple, a connecting nozzle and an electric connector; the gas path assembly is connected with the connecting nozzle, and is used for realizing the ventilation of the pipeline; the thermocouple is fixed in a groove of the gas path assembly, and a free end thereof is connected with the electric connector, and is used for realizing the electric signal of the pipeline; the gas path assembly comprises a gas path body, and a weak part is arranged on the gas path body, and the weak part is protected by the protection tool.

[0015] Optionally, a sleeve assembly is further arranged outside the gas path body.

[0016] Compared with the prior art, the application can realize at least one of the following beneficial effects:

[0017] (1) The protection tool is arranged, so that the breakage at the weak part in the subsequent turnover and processing process can be effectively prevented.

[0018] (2) The first groove is arranged on the end face of the connecting body, the through hole is arranged along the axial direction of the connecting body, the node of the thermocouple is arranged in the communication position of 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, and the ventilation function of the pipeline is realized. The electric function of the pipeline is realized by arranging the thermocouple, and then the ventilation and electric dual functions are realized.

[0019] (3) The first groove is arranged on the end face of the connecting body, the second groove is arranged on the outer surface of the connecting body, and the first groove and the second groove are communicated, so that the thermocouple can be arranged in the first groove and the second groove in order. On the one hand, the risk of short circuit caused by the contact between the thermocouple and other metals is reduced, and on the other hand, the volume of the pipeline is reduced.

[0020] (4) The insulating coating is sprayed on the end face of the first groove, so that the conduction between the connecting body and the thermocouple can be prevented.

[0021] (5) The insertion slot is arranged at the connection position of the connecting body and the gas path body, so that the connection between the connecting body and the gas path body is more firm.

[0022] (6) The insulating part is arranged outside the thermocouple, so that the thermocouple is insulated from other metals of the pipeline, so that the function of transmitting the electric signal of the thermocouple can be realized, and the transmitted electric signal is clear and stable.

[0023] (7) The present application can position and limit the sleeve body on the cabin body by setting the limiting sleeve outside the sleeve body, thereby saving 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 adjacent limiting sleeves, further saving the internal space of the cabin body.

[0024] (8) In the forming method of the pipeline with dual functions of ventilation and power supply, the first sleeve assembly and the second sleeve assembly are not bent and formed before being sleeved into the air path body, but are bent and formed after being sleeved into the air path body, thereby reducing damage to the insulating part outside the thermocouple during sleeving of the first sleeve assembly and the second sleeve assembly, effectively ensuring insulation of the thermocouple and the remaining metal part of the pipeline, and improving the qualification rate of the pipeline with dual functions of ventilation and power supply.

[0025] (9) In the forming method of the pipeline with dual functions of ventilation and power supply, the air tightness and / or insulation test is performed after each operation, so that problems can be found in time and handled in time, thereby improving the forming efficiency and the forming qualification rate.

[0026] (10) The present application is directed to the problem that it is difficult to perform a positive pressure air tightness test when the thermocouple is bonded in the second groove. By using a vacuum bag to perform negative pressure testing, the air tightness test can be completed, and the thermocouple can be protected from damage.

[0027] (11) The present application sets a flow guide, which can limit the airflow from the through hole on the connecting body 1-1 to improve the ventilation effect, and protect the front-end thermocouple.

[0028] (12) The present application sets a weak part to facilitate the breaking and falling off of the pipeline after completing the corresponding function.

[0029] In the present application, the above technical solutions can be combined with each other to realize more preferred combination solutions. 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

[0030] 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:

[0031] Figure 1 Structure diagram of the pipeline with dual functions of ventilation and power supply of the present application;

[0032] Figure 2 Structure diagram of the air path assembly;

[0033] Figure 3 Structure diagram of first sleeve assembly;

[0034] Figure 4 Structure diagram of second sleeve assembly;

[0035] Figure 5 Structure diagram of gas path main body provided with a weak portion (annular groove);

[0036] Figure 6 Structure diagram of protection tool;

[0037] Figure 7 Structure diagram of flow guide;

[0038] Figure 8 Structure diagram of tool electrode of the application;

[0039] Figure 9 Structure diagram of Figure 8 Structure diagram of cross section at A-A;

[0040] Figure 10 Structure diagram of Figure 8 Structure diagram of cross section at B-B;

[0041] Figure 11 Structure diagram of tool electrode of the application when the center line of the discharge end coincides with the central axis of the inner cavity of the stainless steel pipe;

[0042] Figure 12 Structure diagram of tool electrode of the application when the center line deviates from the central axis of the inner cavity of the stainless steel pipe;

[0043] Figure 13 Structure diagram of tool electrode of the application when the discharge end sleeve is on the stainless steel pipe;

[0044] Figure 14 Structure diagram of the movement track of the center point O2 of the discharge end when the discharge end of the tool electrode moves eccentrically around the central axis of the inner cavity of the stainless steel pipe;

[0045] Figure 15 Structure diagram of the movement track of any point O3 on the discharge end when the discharge end of the tool electrode moves eccentrically around the central axis of the inner cavity of the stainless steel pipe;

[0046] Figure 16 Structure diagram of the bearing assembly of the application in cooperation with the stainless steel pipe;

[0047] Figure 17 Structure diagram of the annular groove of the stainless steel pipe of the application;

[0048] Figure 18The structure diagram of the equal-height positioning block, the clamping plate and the stainless steel pipe in the application;

[0049] Figure 19 The structure diagram of the auxiliary bearing block and the stainless steel pipe in the application.

[0050] Reference signs:

[0051] 1, gas path assembly; 1-1, connecting main body; 1-2, gas path main body; 1-3, through hole; 1-4, first groove; 1-5, second groove; 1-6, first open slot; 1-7, protrusion; 2, first sleeve assembly; 2-1, first sleeve main body; 2-2, first limiting sleeve; 2-3, connecting sleeve; 3, second sleeve assembly; 3-1, second sleeve main body 3-1; 3-2, second limiting sleeve; 4, thermocouple; 5, connecting nozzle; 6, electrical connector; 7, weak part; 8, protective tool; 8-1, protective main body; 8-2, pressing part; 8-3, anti-loosening part; 8-4, through slot; 9, flow guide part; 9-1, flow guide main body; 9-2, flow guide cap; 9-3, flow guide hole; 10, tool electrode; 11, workbench surface; 12, equal-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 movement direction;

[0052] H1, wall thickness of the stainless steel pipe; H2, wall thickness of the annular groove; α, oblique angle; S 11 , S 12 , S 13 , S 14 , actual excess gap value between four selected points on the circular working end of the tool electrode and the outer end surface of the stainless steel pipe; S2, machining gap; O1, center point of the discharge end; O2, center point of the inner cavity of the stainless steel pipe; O3, selected point on the discharge end. DETAILED DESCRIPTION

[0053] The preferred embodiments of the application will be described in detail below with reference to the drawings, wherein the drawings constitute a part of the application and serve to explain the principles of the embodiments of the application, but are not used to limit the scope of the application.

[0054] Embodiment one

[0055] One specific embodiment of the application discloses a pipe line with double functions of ventilation and electricity, like Figure 1As shown, it comprises a gas path assembly 1, a first sleeve assembly 2, a second sleeve assembly 3, a thermocouple 4, a connector nozzle 5 and an electrical connector 6. The gas path assembly 1 is connected with the connector nozzle 5 for realizing the ventilation of the pipeline. The thermocouple 4 is fixed on the gas path assembly 1, and its free end is connected with the electrical connector 6 for realizing the power signal of the pipeline. The first sleeve assembly 2 and the second sleeve assembly 3 are sleeved outside the gas path assembly 1 and the thermocouple 4 for protecting the gas path assembly 1 and the thermocouple 4.

[0056] As shown, Figure 2 The gas path assembly 1 comprises the connecting seat and the gas path body 1-2 of the first embodiment. The connecting seat comprises a connecting body 1-1, and an axial through hole 1-3 is arranged on the connecting body 1-1. 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 its length 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.

[0057] 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.

[0058] In a preferred embodiment, an insulating coating is arranged on the end face of the connecting body 1-1 provided with the first groove 1-4, so as to prevent the connecting body 1-1 from being in conduction with the thermocouple 4.

[0059] A second groove 1-5 is arranged on the side face of the connecting body 1-1. 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 they are both in communication with the first groove. The two second grooves are symmetrically arranged relative to the through hole.

[0060] In a possible embodiment, the connecting seat further comprises a protrusion 1-7 arranged on the end of the connecting body 1-1 connected with the gas path body 1-2. The protrusion 1-7 is circumferentially arranged along the outer surface of the connecting body 1-1. An external thread is arranged on the connecting body 1-1 for connecting with other components (such as a flow guide). The protrusion plays a limiting role to prevent over-tightening. A radial opening slot is arranged on the protrusion 1-7.

[0061] 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 for facilitating the passage of the thermocouple 4. 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.

[0062] Further, a welding slot (not shown in the figure) is arranged at the connection between the connection body 1-1 and the gas path body 1-2. Through the above arrangement, the welding between the connection body 1-1 and the gas path body 1-2 can be more reliable.

[0063] The other end of the gas path body 1-2 is connected with the connector 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.

[0064] As shown in Figure 3 , 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 sleeved outside the gas path body 1-2 and used to protect the gas path body 1-2 and the thermocouple 4. The first limiting sleeve 2-2 is a hollow tube, which is sleeved outside the first sleeve body 2-1 and used to position and limit the first sleeve body 2-1 on the cabin body, so as to position and limit the gas-electric dual-function pipeline on the cabin body. Specifically, the bottom of the limiting part of the first limiting sleeve 2-2 is adhered to the wall of the cabin body. The connecting sleeve 2-3 is sleeved outside the first sleeve body 2-1 at one end of the first sleeve body 2-1 and connected with the connection body 1-1.

[0065] In a preferred embodiment, the number of the first limiting sleeves 2-2 is multiple, and the multiple first limiting sleeves are arranged in sequence along the length direction of the first sleeve body 2-1, and gaps are arranged between adjacent first limiting sleeves for installing and limiting other components, so as to achieve the purpose of reasonable use of space and orderly arrangement of components. The size of the gap can be determined according to the components to be installed and limited.

[0066] In a possible embodiment, the first limiting sleeve 2-2 and the connecting sleeve 2-3 are fixedly connected with the first sleeve body 2-1, for example, by welding.

[0067] In addition, the connecting sleeve 2-3 is fixedly connected with the connection body 1-1, so as to realize the connection between the first sleeve assembly 2 and the gas path assembly 1.

[0068] In a specific embodiment, the first sleeve body 2-1 is a stainless steel pipe with a diameter of 5 mm and a wall thickness of 0.8 mm.

[0069] The second sleeve assembly 3 is arranged downstream of the first sleeve assembly 2 to realize segmented protection. As shown in Figure 4 , 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, which is arranged outside the gas path body 1-2 and used to protect the gas path body 1-2 and the thermocouple 4. The second limiting sleeve 3-2 is a hollow tube, which is sleeved outside the second sleeve body 3-1 and used to limit the second sleeve body 3-1 on the cabin body.

[0070] Specifically, the second sleeve body 3-1 is a stainless steel pipe with a diameter of 4mm and a wall thickness of 0.3mm.

[0071] The second limiting sleeve 3-2 is a stainless steel tube with a diameter of 5mm and a wall thickness of 0.5mm.

[0072] In a preferred embodiment, such as Figure 5 As shown, a weak point 7 is provided on the gas path body 1-2, between the first sleeve assembly 2 and the second sleeve assembly 3, to facilitate breakage and detachment of the pipeline after it has completed its function. Specifically, the weak point 7 is an annular groove arranged circumferentially along the outer surface of the gas path body 1-2, meaning that the wall thickness of the gas path body 1-2 at the location of the weak point is less than the wall thickness of the gas path body 1-2 without the weak point. For example, the wall thickness of the gas path body 1-2 without the weak point is 0.5 mm, while the wall thickness of the gas path body 1-2 with the weak point is 0.2 mm, and the depth of the annular groove is 0.3 mm.

[0073] Thermocouple 4 is used to transmit electrical signals and has a node on it for generating and transmitting electrical signals. An insulating part is fitted around the outside of thermocouple 4. Thermocouple 4 is wire-shaped, preferably platinum-rhodium wire. The node is located at the connection between the first groove and the through hole and is suspended. The advantage of this arrangement is that it allows gas to enter the through hole and the main gas path through the gap between the node and the connector, thus achieving the gas passage function.

[0074] In one possible configuration, thermocouples 4 located on either side of the node are fixed within two second grooves, with the free ends of thermocouples 4 connected to electrical connectors 6. Exemplarily, thermocouples 4 are fixed within the second grooves by adhesive bonding. The adhesive used may be J303 glue.

[0075] Specifically, the insulation material is alumina ceramic. The advantage of using alumina ceramic is that the pipeline of this invention is used in a high-temperature environment, and alumina has good high-temperature resistance and will not age due to high temperatures, thus providing excellent insulation.

[0076] In a preferred embodiment, the insulating portion includes multiple insulating units, which are arranged sequentially along the length of the thermocouple 4. This segmented arrangement facilitates subsequent bending and shaping of the pipeline and reduces the risk of damage to the insulating portion during bending. For example, each insulating unit is a hollow cylinder with a length of 5 mm, an inner diameter of 0.5 mm, and an outer diameter of 1 mm. The insulating unit is made of alumina ceramic.

[0077] Because the front end of the pneumatic circuit assembly is in a high-temperature environment, the connector at the front end of the pneumatic circuit assembly is made of high-temperature resistant alloy material, the main body of the pneumatic circuit is made of stainless steel, the circuit part uses thermocouples (platinum-rhodium wire) to transmit electrical signals, and the end uses an electrical connector to send electrical signals. Therefore, the circuit part and the pneumatic part must be insulated during the pipeline design and manufacturing process. At the same time, the pipeline components must have the ability to provide limiting and positioning assistance functions in a narrow chamber in order to meet the final use requirements.

[0078] In addition, the pipeline with dual functions of ventilation and power supply in this embodiment also includes a flow guide 9. This flow guide 9 is located at the end of the connecting body 1-1 where the first groove 1-4 is provided, and is used to guide airflow into the through hole of the connecting body 1-1. Figure 7 As shown, the flow guide 9 includes a flow guide body 9-1 and a flow guide cap 9-2 located at one end of the flow guide body 9-1.

[0079] The flow guide body 9-1 is cylindrical, and has a flow guide hole 9-3 that passes through the flow guide body 9-1 and the flow guide cap 9-2. The flow guide hole is axially oriented and is a through hole. The flow guide hole 9-3 has an internal thread to achieve a threaded connection with the connecting body 1-1. After the flow guide is installed on the connecting body 1-1, the end face of the flow guide cap 9-2 is higher than the end face of the connecting body 1-1 with the first groove, thus forming a flow guide channel. The gas first enters the flow guide channel and is then guided into the through hole of the connecting body 1-1.

[0080] Example 3

[0081] 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.

[0082] The connecting body 1-1 has 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 other end has 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.

[0083] 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.

[0084] 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.

[0085] 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 to the other end of the connecting body 1-1. 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.

[0086] 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 serves as a limiting function 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.

[0087] In a possible implementation, the protrusion 1-7 is provided with a radial open slot. The open slot is used for the thermocouple to pass through and for the installation of the pipeline. Specifically, the open slot includes a first open slot 1-6 and a second open slot. The number of the first open slot 1-6 and the second open slot is two. The two first open slots 1-6 and the two second open slots are alternately and uniformly distributed in the circumferential direction. The two first open slots 1-6 respectively communicate with the two second grooves to facilitate the thermocouple 4 to pass through. The two second open slots are used for the overall installation of the pipeline. Exemplarily, the protrusion 1-7 is a flange structure.

[0088] Embodiment Two

[0089] Since the gas path body 1-2 is provided with the weak part 7, it is easy to cause the weak part to break during subsequent turnover and processing. Based on the above consideration, the embodiment provides a protection tool 8 for protecting the weak part in the embodiment one.

[0090] 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 the fixation of the weak part 7. The pressing member 8-2 is sleeved on the protection body 8-1.

[0091] Specifically, one end of the protection body 8-1 is closed, and a through slot 8-4 in the radial direction of the protection body 8-1 is arranged thereon. 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.

[0092] If the gas path main body 1-2 is long, it is inconvenient to pass one end of the gas path main body 1-2 through the through groove to place the weak part in the through groove. Therefore, in a preferred embodiment, the through groove 8-4 extends from one end of the protection main body 8-1 to the other end of the protection main body 8-1, so that the other end of the protection main body 8-1 is an open end. Since the through groove 8-4 extends from one end of the protection main body 8-1 to the other end of the protection main body 8-1, when in use, it is not necessary to pass one end of the gas path main body 1-2 through the through groove, but only need to pass the weak part 7 from the opening at the other end of the protection main body 8-1 to achieve that the weak part 7 is located in the through groove 8-4, greatly improving the convenience of operation.

[0093] In a possible embodiment, the compression member 8-2 is provided with a through hole for the protection main body to pass through. The compression member 8-2 is threadedly connected with the protection main body 8-1. Exemplarily, the outer surface of the protection main body is provided with external threads, and the through hole of the compression member is provided with internal threads.

[0094] Preferably, the protection tool further comprises a locking member 8-3. The locking member 8-3 is arranged on the outside of the compression member 8-2, close to the open end of the protection main body 8-1, for preventing the compression member 8-2 from loosening, thereby preventing the weak part from moving out of the through groove 8-4 of the protection main body 8-1. The structure of the locking member 8-3 can be the same as that of the compression member, or other structures can be adopted as long as they can prevent the compression member from loosening.

[0095] In order to reduce the processing difficulty, the protection main body 8-1 of the embodiment can adopt a bolt, and an axial through groove is formed by machining a through groove on the screw rod in the length direction, and the locking member and the compression member can both adopt a nut.

[0096] Embodiment three

[0097] 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 comprises the following steps:

[0098] Step 1: turning the outer shape of the connecting seat on a lathe, i.e. the connecting main body, the protrusion at one end of the connecting main body, and the external threads on the connecting main body.

[0099] Step 2: machining the through hole on the connecting main body.

[0100] The through hole on the connecting main body is machined by electric spark machining with the other end of the connecting main body (i.e. the end face of the end not including the protrusion) as a reference.

[0101] Step 3: machining the second groove on both sides of the connecting main body, the opening groove on the protrusion, and the first groove on the connecting main body, which specifically comprises the following steps:

[0102] The same base as step 2 is adopted, that is, the end face of the other end of the connecting body (that is, the end not including the protrusion) is still taken as the base, first, two second grooves on the two sides of the connecting body and two first opening grooves on the protrusion are simultaneously machined by electric spark machining; second, two second opening grooves on the protrusion are machined by electric spark machining; and finally, the first groove on the connecting body is machined by electric spark machining.

[0103] During machining, the size tolerance of the first groove and the second groove needs to be strictly controlled, so that the thermocouple with the sleeved insulation part (alumina ceramic) does not protrude from the groove after being placed in the groove.

[0104] Embodiment Four

[0105] In another specific embodiment of the present application, a forming method of the gas-electric dual-function pipeline is disclosed, which is used for forming the pipeline with the dual functions of gas ventilation and electricity transmission according to Embodiment One.

[0106] Before forming the gas-electric dual-function pipeline, each component, such as the connecting seat, the first sleeve assembly, the second sleeve assembly, etc., is machined and formed. After each component is machined and formed, the entire gas-electric dual-function pipeline is not formed as a whole, but each component is assembled first to ensure that each component can be smoothly assembled, and then the entire gas-electric dual-function pipeline is formed as a whole.

[0107] The machining of the connecting seat is described in Embodiment Three, and the forming of the first sleeve assembly 2 and the second sleeve assembly 3 is described below.

[0108] The first sleeve assembly 2 is formed by the following method:

[0109] Step 1: Calculate the length of the first sleeve body 2-1, saw cut the blank, and remove burrs from the flat end.

[0110] Step 2: Cut a plurality of first limiting sleeves 2-2, saw cut the blank, and remove burrs from the flat end.

[0111] Step 3: Machine and form the connecting sleeve 2-3.

[0112] Step 4: Mark a line on the first sleeve body, and weld the plurality of first limiting sleeves 2-2 and the first sleeve body 2-1 as a whole by cold welding. When welding each first limiting sleeve, 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.

[0113] Step 5: The connecting sleeve is sleeved on one end of the first sleeve body and welded. The welding method is the same as that in Step 4.

[0114] The second sleeve assembly 3 is formed by the following method:

[0115] Step 1: Calculate the length of the second sleeve body 3-1, saw cut the blank, and remove burrs from the flat end;

[0116] Step 2: Cut the second limiting sleeve 3-2, and remove burrs from the flat end.

[0117] Step 3: Set the second limiting sleeve 3-2 on the second sleeve body 3-1, and weld it; note that the tube wall is too thin, which may be welded through, so a copper rod is needed inside.

[0118] The assembly method of the gas-electric dual-function pipeline comprises the following steps:

[0119] Step 1: Connect the gas path body with the connecting seat to obtain a gas path assembly.

[0120] Step 2: Set the insulation part on the outside of the thermocouple, and fix the thermocouple on the connecting seat. Specifically:

[0121] Step 21: Place the node of the thermocouple at the communication between the first groove and the through hole on the connecting body of the connecting seat, and suspend it;

[0122] Step 22: Set the multiple insulation units on the thermocouple in sequence, so as to set the insulation part on the thermocouple;

[0123] Step 23: Fix the thermocouple in the second groove on the connecting body.

[0124] Step 3: Set the sleeve assembly on the outside of the gas path body and the thermocouple. Specifically:

[0125] Step 31: Set the first sleeve assembly into the outside of the gas path body and the thermocouple;

[0126] Step 32: Set the second sleeve assembly into the outside of the gas path body and the thermocouple, downstream of the first sleeve assembly.

[0127] Further, step 31 further comprises: if there is a damaged insulation unit during the setting of the first sleeve assembly, removing the damaged insulation unit and re-setting the following insulation units after being arranged smoothly.

[0128] Step 4: Connect the gas path body with the pipe mouth.

[0129] Step 5: Connect the free end of the thermocouple with the electric connector to obtain a gas-electric dual-function pipeline.

[0130] The forming method of the gas-electric dual-function pipeline of the embodiment comprises the following steps:

[0131] Step 1: One end of the gas path body 1-2 is inserted into the welding slot of the connecting body 1-1, and argon arc welding is performed to make the two into one, obtaining the gas path assembly 1. When welding, a 10mm allowance is left between the gas path body 1-2 and the connecting body 1-1, which is intended to meet the minimum pipe size for aeration and forming function.

[0132] Step 2: The other end of the gas path body 1-2 is welded with the connecting pipe nozzle 5, and the gas path assembly 1 is subjected to a positive pressure air tightness test to check the air tightness of the weld between the connecting body 1-1 and the gas path body 1-2. After the air tightness is qualified, the weld is checked for passability with a 0.5mm iron wire to ensure that the through hole on the connecting body after welding can be aerated. Ensure that the through hole on the connecting body after welding can be aerated, remove the connecting pipe 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.

[0133] Step 3: Fix the thermocouple.

[0134] An insulating coating is sprayed on the end face of the connecting body 1-1 provided with the first groove 1-4, the node of the thermocouple 4 is placed at the communication between the first groove 1-4 and the through hole 1-3 on the connecting body 1-1 and is suspended, and the insulating part is sleeved 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.

[0135] 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 body 1-2 and the thermocouple 4. Specifically as follows:

[0136] 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 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.

[0137] Step 5: The second sleeve assembly 3 is sleeved outside the gas path body 1-2 and the thermocouple 4, the first sleeve assembly 2 and the connecting 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.

[0138] Downstream of the first sleeve assembly 2. The same attention is paid to the insertion of the second sleeve assembly 2. After the insertion, the resistance is measured to ensure the insulation of the thermocouple 4 and the rest of the metal part of the pipeline. After confirming the insulation, the second sleeve assembly 3 and the connecting body 1-1 are welded, and after the welding is completed, the resistance is measured again to confirm whether the insulation is good. If not, find the reason until the insulation is good.

[0139] Step 6: According to the design requirements, the first sleeve assembly 2 and the second sleeve assembly 3 are bent and shaped, and the bending needs to be slow and careful. After the bending is completed, the resistance is measured to ensure the insulation of the thermocouple 4 and the rest of the metal part of the pipeline. The first sleeve assembly 2 and the second sleeve assembly 3 are fixed by J303 glue to obtain a pipeline with gas and electric dual functions.

[0140] Step 7: The pipeline with gas and electric dual functions is subjected to airtight test.

[0141] Since the second groove 1-5 of the connecting body 1-1 is bonded with the thermocouple 4 at this time, it is difficult to perform a positive pressure airtight test. In a preferred embodiment, therefore, all parts in front of the weld at the pipe nozzle 5 can be loaded into an airtight test piece, and the mouth is sealed by sealing cement, and the airtight test is performed in a way of negative pressure. Specifically, the airtight test piece can be a vacuum bag.

[0142] Step 8: The free end of the thermocouple 4 is connected with the electric connector 6, and the resistance is measured to ensure the insulation of the thermocouple 4 and the rest of the metal part of the pipeline.

[0143] Example Five

[0144] Another specific embodiment of the present application provides a method for machining an annular groove for machining the weak part of the gas and electric dual function pipeline of Example One.

[0145] This embodiment adopts the method of electric spark machining to solve the problem that it is difficult to realize high-precision machining of an annular groove on an ultra-fine long and thin tubular part.

[0146] Specifically, the method comprises using a plurality of electric spark machining point positions of a tool electrode arranged circumferentially around the to-be-machined part in a working state to realize machining of the annular groove on the to-be-machined surface.

[0147] Among them, the same electric spark machining point position comprises a working state and a non-working state, and when the distance between the electric spark machining point position and the to-be-machined surface is greater than a threshold value, the electric spark machining point position is in the non-working state;

[0148] When the distance between the electric spark machining point position and the to-be-machined surface is less than or equal to the threshold value, the electric spark machining point position is in the working state;

[0149] Among them, the threshold value is the discharge distance between the electric spark machining point position and the to-be-machined surface that meets the machining requirements.

[0150] The discharge end 101 includes multiple electrical discharge machining points arranged around the circumference of the workpiece. These multiple electrical discharge machining points can be continuously and uninterruptedly distributed around the circumference of the workpiece, or they can be discontinuously distributed around the circumference of the workpiece, as long as they can achieve continuous machining and forming of the annular groove on the workpiece surface.

[0151] In one possible implementation, one end of the tool electrode 10 is annular, meaning that multiple electrical discharge machining points arranged circumferentially around the workpiece form a continuous annular shape, such as... Figures 8-13 As shown, the inner circle of the ring matches the shape of the annular groove, that is, the inner circle is convex and the annular groove is concave. The cross-sectional dimensions of the convex shape are the same as the cross-sectional shape of the concave shape. The other end of the tool electrode 10 is a conductive end 104, which is electrically connected to an output end of a power supply device installed on the machine tool to introduce current and transmit the current to the inner circle. At this time, the inner circle is a discharge end 101, so that the annular groove on the surface to be processed can be processed through the working state of multiple electrical discharge machining points arranged around the circumference of the workpiece by the discharge end 101.

[0152] In one possible implementation, the discharge end 101 is a rigid structure, fitted onto the outer end face of the gas path body 1-2. Specifically, the gas path body 1-2 is a stainless steel tube. During processing, the stainless steel tube is electrically connected to another output end of the power supply device, and the tool electrode 10 moves eccentrically around the central axis of the inner cavity of the stainless steel tube; wherein, during the eccentric movement of the tool electrode 10, the distance between the inner circular end face of the discharge end 101 and the end face to be processed of the stainless steel tube is constantly changing; when the distance between the EDM point and the surface to be processed is greater than a threshold, the EDM point is in a non-working state, and at this time, the EDM point is a non-working end 103; when the distance between the EDM point and the surface to be processed is less than or equal to the threshold, the EDM point is in a working state, and at this time, the EDM point is a non-working end 103. The EDM machining point is the working end 102. In this way, the working state and non-working state can be changed at the same EDM machining point. The working state of all EDM machining points can jointly realize the machining of the annular groove on the workpiece surface. That is to say, the position of the working end 102 changes continuously within the inner circular end face of the discharge end 101. The circular discharge end of the tool electrode moves eccentrically around the central axis of the inner cavity of the stainless steel tube. All working ends form a continuous annular discharge end around the workpiece. In this way, the discharge end 101 of the tool electrode 10 is avoided to be in a continuous machining state, thereby reducing the wear of the tool electrode 10.

[0153] The circular ring discharge end 101 of the tool electrode 10 includes a plurality of working ends 102 distributed in a ring shape, and when the discharge end moves eccentrically around the central axis of the inner cavity of the stainless steel pipe, the plurality of working ends 102 are in a non-synchronous and non-continuous machining state, and the machining tracks of the plurality of working ends jointly form a ring-shaped groove of the workpiece to be machined.

[0154] Specifically, after the tool electrode 10 moves eccentrically for one cycle, all the end faces of the discharge end 101 participate in the electric spark machining, that is, all the working ends 102 form a complete discharge end 101, and the machining tracks of all the working ends 102 form a ring-shaped groove of the stainless steel pipe. Along the deflection direction of the tool electrode 10, the working ends 102 exhibit a "circular motion" phenomenon on the discharge end 101, that is, the positions of the working ends 102 are different at different times, so that all the working ends 102 alternately and orderly perform machining, and the machining direction 16 is the circumferential direction of the outer end face of the stainless steel pipe, and the plane in which the circumferential direction is located is perpendicular to the central axis of the inner cavity of the stainless steel pipe.

[0155] Specifically, after the tool electrode 10 moves eccentrically for one cycle, all the end faces of the discharge end 101 participate in the electric spark machining, that is, all the working ends 102 form a complete discharge end 101, and the machining tracks of all the working ends 102 form a ring-shaped groove of the stainless steel pipe. Along the deflection direction of the tool electrode 10, the working ends 102 exhibit a "circular motion" phenomenon on the discharge end 101, that is, the positions of the working ends 102 are different at different times, so that all the working ends 102 alternately and orderly perform machining, and the machining direction 16 is the circumferential direction of the outer end face of the stainless steel pipe, and the plane in which the circumferential direction is located is perpendicular to the central axis of the inner cavity of the stainless steel pipe.

[0156] Specifically, the tool electrode 10 is installed on a machine tool, and when machining, the machine tool drives the tool electrode 10 to move eccentrically, so that the discharge end 101 of the tool electrode 101 performs electric spark machining around the end face of the stainless steel pipe, the machining direction 16 is the circumferential direction of the outer end face of the stainless steel pipe, and the center line of the circumferential direction coincides with the central axis of the inner cavity of the stainless steel pipe.

[0157] Specifically, before the tool electrode 10 moves eccentrically, 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 larger 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 the outer diameter of the stainless steel pipe. In this way, the value of the single-sided feed amount O1O2 can be easily determined during electric spark machining.

[0158] Specifically, the tool electrode 10 is installed on a machine tool, and when machining, the machine tool drives the tool electrode 10 to move eccentrically, so that the discharge end 101 of the tool electrode 101 performs electric spark machining around the end face of the stainless steel pipe, the machining direction 16 is the circumferential direction of the outer end face of the stainless steel pipe, and the center line of the circumferential direction coincides with the central axis of the inner cavity of the stainless steel pipe.

[0159] O1O2=S1+(H1-H2)-S2

[0160] O1 represents the center point of the discharge end 101 of the tool electrode 10;

[0161] O2 represents the center point of the inner cavity of the stainless steel pipe;

[0162] H1 is the wall thickness of the stainless steel tube;

[0163] H2 is the wall thickness of the annular groove;

[0164] S1 is the excess gap between the discharge end 101 and the outer end surface of the stainless steel tube;

[0165] S2 is the machining gap, which refers to the closest distance between the working end 102 and the end surface of the stainless steel tube 01 when the tool electrode 10 is eccentrically moved.

[0166] wherein S1 satisfies:

[0167]

[0168] wherein S 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 surface of the stainless steel tube, and the four points are uniformly distributed on the discharge end 101.

[0169] 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.

[0170] wherein the machining gap S2 is 10-50 μm to meet the requirements of electric spark machining.

[0171] For example, S2 = 10 μm, H1 = 0.5 mm, H2 = 0.3 mm, and S1 = 2.058 mm, and O1O2 = 2.248 mm.

[0172] wherein the automatic centering module on the machine tool can be used to measure 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 in the inner cavity of the stainless steel tube.

[0173] wherein after the center of the discharge end 101 of the tool electrode 10 coincides with the central axis in the inner cavity of the stainless steel tube by adjusting the machine tool, the actual measured S 11 , S 12 , S 13 , S 14The closer the four values are, the more accurate the value of S1 is, and the more accurate the unilateral 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, so that the size accuracy of the annular groove is ensured.

[0174] Specifically, 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 driven to move eccentrically by the machine tool, and the detailed process is as follows.

[0175] 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:

[0176] The tool electrode 10 is moved so that O1 is away from O2 by a distance equal to the unilateral feed amount O1O2, and at this time, the distance between O1 and O2 is O1O2.

[0177] 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.

[0178] In the process of moving 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 moves in a circular motion around O2.

[0179] In order 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:

[0180] The tool electrode 10 is moved so that O3 moves towards O2 by a distance of O1O2.

[0181] 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.

[0182] In the process of moving 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 moving distance of O3 reaches O1O2, and then O3 moves in a circular motion around its initial position.

[0183] 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.

[0184] 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.

[0185] 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.

[0186] 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.

[0187] For example, during machining, the electrical parameters satisfy:

[0188] 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.

[0189] Specifically, during machining, the tool electrode 10 is controlled to eccentrically move by the machine tool, and the stainless steel pipe is kept stationary.

[0190] 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.

[0191] 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.

[0192] For example, during machining, the non-electric parameters satisfy:

[0193] 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.

[0194] Specifically, as shown in Figure 16 the stainless steel pipe is clamped by placing it on the equal-height positioning blocks 12 and the auxiliary bearing blocks 13.

[0195] 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.

[0196] 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.

[0197] 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.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] Wherein, the finding process of the stainless steel pipe is as follows.

[0202] 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.

[0203] 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.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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 chips are generated between the discharge end 101 and the stainless steel pipe, at this time, part of the metal chips will be discharged through the machining gap with the working liquid, 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 chips, so that the metal chips 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 chips.

[0209] By eccentrically moving the discharge end 101 of the tool electrode 10 on the super-fine long stainless steel pipe, the metal chips 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 lower surface roughness can be obtained.

[0210] 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.

[0211] 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.

[0212] 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.

[0213] 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.

[0214] 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 surface metal 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, overcoming the problem of damage to the ultra-slim stainless steel pipe caused by cutting force.

[0215] 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.

[0216] 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.

[0217] The specific steps are as follows:

[0218] 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;

[0219] 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.

[0220] Step 2: Clamping the gas path body 1-2 by using the bearing assembly and aligning the gas path body 1-2.

[0221] 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 of the equal-height positioning blocks 12 and the auxiliary bearing blocks 13 with 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.

[0222] 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.

[0223] 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.

[0224] 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.

[0225] Specifically, first, move the bearing assembly in the X-axis direction by using the machine tool to adjust the position of the stainless steel pipe, so that the position to be machined of the stainless steel 6 is located in the discharge end 101 of the tool electrode 10.

[0226] 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.

[0227] 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.

[0228] Specifically, step 4 includes the following steps:

[0229] Step 41: control 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;

[0230] Specifically, the machine tool drives the transmission rod 15 to swing in the YZ plane, and then controls 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 through the transmission rod 15. The eccentric movement direction 17 is shown in Figure 14 .

[0231] The swing speed of the transmission rod 15 is 0.5 rpm;

[0232] 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;

[0233] The processing gap S2 is 10 μm;

[0234] The single-sided feed amount O1O2=S1+(H1-H2)-S2=2.058+(0.5-0.3)-0.01=2.248 mm;

[0235] The processing speed is 0.04 g / min.

[0236] Step 42: when the tool electrode 10 moves eccentrically, the tool electrode 10 is powered to perform electric spark machining.

[0237] Specifically, the electrical parameters satisfy:

[0238] 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.

[0239] 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.

[0240] Table 1 Processing parameters

[0241]

[0242] The processing requirements are that the wall thickness of the annular groove is 0.3±0.05 mm, and the bevel angle α is 90°. The detection results are shown in Table 2.

[0243] Table 2 Detection results

[0244]

[0245]

[0246] 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.

[0247] 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.

[0248] 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.

[0249] 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.

[0250] 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.

[0251] 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.

[0252] The annular groove is completed by using the following machining device. The machining device comprises a tool electrode 10, a bearing assembly and a driving assembly which are 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.

[0253] Specifically, one end of the tool electrode 10 is in the form of a circular ring, the inner circle end of the circular ring is matched with 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.

[0254] 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.

[0255] 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, 2.050 mm, and at this time, S1=2.058 mm.

[0256] Wherein, S2=10μm; H1=0.5mm, H2=0.3mm, S1=2.058mm, at this time, O1O2=2.248mm.

[0257] 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.

[0258] 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.

[0259] Wherein, during the machining process, the electrical parameters satisfy:

[0260] The pulse width is 40μs, the pulse interval is 26μs, the average machining current is 1A, and the average machining voltage is 40V.

[0261] 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.

[0262] Wherein, during the machining process, the non-electrical parameters satisfy:

[0263] 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.

[0264] 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.

[0265] 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.

[0266] 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.

[0267] 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.

[0268] 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.

[0269] 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.

[0270] 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.

[0271] 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.

[0272] 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.

[0273] 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. The selection of a plurality of small-diameter stainless steel pipes to form the pipe body and the sleeve assembly can meet the minimum space and positioning requirements. The selection of the thermocouple wire structure can meet the insulation requirements. 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 while ensuring the insulation performance of the parts, achieving the functions of ventilation and sending electric signals of the pipe.

[0274] 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 electro-gas dual function pipe, characterized by, The gas circuit assembly is connected with the pipe connecting nozzle to realize the ventilation of the pipeline; the thermocouple is fixed in the groove of the gas circuit assembly, and the free end thereof is connected with the electric connector to realize the electric signal of the pipeline; The gas circuit assembly comprises a gas circuit body, and a weak part is arranged on the gas circuit body; the weak part is protected by a protection tool; the weak part is an annular groove arranged along the circumference of the outer surface of the gas circuit body; the gas circuit body is a stainless steel pipe; The annular groove is machined by the following method: a plurality of electric spark machining points arranged along the circumference of the stainless steel pipe are used to realize the machining of the annular groove on the machined surface; The distance between the electric spark machining points and the machined surface changes constantly to realize the transition between the working state and the non-working state; The discharge end of the tool electrode comprises a plurality of electric spark machining points arranged along the circumference of the stainless steel pipe; during machining, the plurality of electric spark machining points arranged along the circumference of the stainless steel pipe form a continuous circular ring, and the inner circle end of the circular ring matches the shape of the annular groove; The discharge end of the tool electrode is eccentrically moved around the central axis of the inner cavity of the stainless steel pipe during machining, and the stainless steel pipe remains stationary; The machining direction is the circumferential direction of the outer end surface of the stainless steel pipe, and the center line of the circumferential direction coincides with the central axis of the inner cavity of the stainless steel pipe. The protection tool comprises a protection body and a compression part; the protection body is used to accommodate the protection object, and the compression part is used to fix the protection object in the protection body to realize the fixation of the protection object; 2. The tubing of claim 1, wherein, One end of the protection body is closed, and a through groove is arranged on the protection body in the radial direction to place the protection object in the through groove; The compression part is sleeved on the protection body. The through groove extends from one end of the protection body to the other end, so that the other end of the protection body is an open end.

3. The tubing of claim 2, wherein, The protection object is a weak part arranged on the gas circuit body of a gas-electric dual-function pipeline.

4. The tubing set of claim 2, wherein, A through hole is arranged on the compression part for the protection body to pass through, and the compression part and the protection body are threadedly connected.

5. The tubing of claim 2, wherein, Further comprising a locking part, which is used to prevent the compression part from loosening, thereby preventing the protection object from moving out of the through groove; 6. The tubing of claim 2, wherein, The locking part is arranged on the outside of the compression part, close to the open end of the protection body. The structure of the locking part is the same as that of the compression part.

7. The tubing set of claim 6, wherein, The protection body is obtained after machining a through groove on the shank of a bolt.

8. The tubing set of claim 2, wherein, The compression part is a nut.

9. The tubing set of claim 8, wherein, Further comprising a sleeve assembly, which is sleeved on the outside of the gas circuit body.

10. The tubing of claim 1, wherein, ​

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