An encapsulation system applicable to the internal sensing unit of a metal spiral armored sleeve

Abstract

The present invention discloses a packaging system suitable for internal sensing units of metal spiral armored sleeves, which includes a gas source assembly, a glue injection mold, a clamping unit, a tensioning unit, a glue injection unit, and a curing unit; both ends of the sensing unit covered with the metal spiral armored sleeve are movably clamped by the clamping ends of the tensioning unit, and the tensioning state is changed axially through the tensioning unit; the glue injection mold is movably arranged at the movable clamping end of the glue injection unit. When the glue injection mold clamps the place to be packaged, the glue injection unit injects curing glue between the metal spiral armored sleeve and the sensing unit; after the glue injection unit and the curing unit switch workstations, the curing unit cures the curing glue. Through the coordinated setting of the above-mentioned components, the present invention realizes the automatic packaging of the internal sensing unit of the metal spiral armored sleeve, significantly improves the production efficiency, and at the same time significantly improves the curing consistency of the packaged products, which is conducive to large-scale popularization and application.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber sensing, and in particular to a packaging system suitable for a sensing unit inside a metal spiral armored sleeve. Background Art

[0002] Currently, in the field of optical fiber distributed sensing technology, the packaging structure of the sensing unit of the metal spiral armored sleeve is favored by technical workers in this field due to its characteristics such as light weight, strong anti-side pressure ability, rat bite prevention, and high degree of automation in production. In the application of optical fiber temperature field monitoring, this forming method of the optical cable with a spiral armored sleeve structure is widely used.

[0003] When applying optical fiber temperature field monitoring, adopting this packaging form of the spiral armored sleeve, the internal sensing unit is in a free contact state, which is relatively easy to achieve, so it has been widely used. In recent years, people have tried to transfer the packaging advantages of this spiral armored sleeve to the monitoring of optical fiber strain fields. Especially in realizing the structural health and operation status monitoring of large rock and soil masses, etc., huge challenges have been encountered. First of all, this winding and forming method of the spiral armored sleeve makes it impossible to fix the strain sensing unit before or during forming; in addition, after the spiral armored sleeve packaging structure is cabled, it is very difficult to peel off, resulting in it being very difficult to fix the strain sensing unit after cabling or in engineering applications. Eventually, the practical engineering application of the optical fiber distributed strain sensing technology based on the spiral armored sleeve packaging structure only stays in the theoretical research stage or some small application scenarios, and has not been widely promoted. In current small application scenarios, after the spiral armored sleeve is formed, engineers manually fix the sensing unit in the sleeve and then perform secondary packaging and cabling; this traditional manual packaging method has many disadvantages, such as low manual packaging efficiency, it is very difficult to ensure the consistency of the curing effect, and the consistency of the extra length of the sensing unit will be seriously affected, etc., and it is difficult to truly meet the application requirements.

[0004] Therefore, how to solve the automated production of fixing the sensing unit inside the metal spiral armored sleeve and improve the curing consistency of the sensing unit is an urgent problem to be solved in the process of popularizing and applying this technology in the field of optical fiber sensing. Summary of the Invention

[0005] The purpose of the present invention is to provide a packaging system suitable for a sensing unit inside a metal spiral armored sleeve, which is used to solve the problem that the existing method of fixing the sensing unit inside the metal spiral armored sleeve has low efficiency and is difficult to meet the curing consistency.

[0006] In order to solve the above technical problems, the present invention provides a packaging system suitable for a sensor unit inside a metal spiral armored casing, comprising an air source component, a glue injection mold, a clamping unit, a tensioning unit, a glue injection unit and a curing unit; both ends of the sensor unit coated with the metal spiral armored casing are movably clamped by the clamping ends of the tensioning unit, and the metal spiral armored rotating casing changes its tension and relaxation state along the axial direction through the tensioning unit; the glue injection mold is movably arranged at the movable clamping end of the glue injection unit, and when the glue injection mold clamps the to-be-packaged portion of the sensor unit coated with the metal spiral armored casing, the glue injection unit injects curing glue between the metal spiral armored rotating casing and the sensor unit; when the glue injection mold does not clamp the to-be-packaged portion of the sensor unit coated with the metal spiral armored casing, the curing unit cures the curing glue; the clamping unit, the tensioning unit, the glue injection unit and the curing unit are all connected to the air path of the air source component, and are driven to operate by the air source component.

[0007] Preferably, the injection mold includes an upper mold, a lower mold, an upper mold sealing gasket group and a lower mold sealing gasket group; the upper mold and the lower mold are correspondingly clamped, and when clamped, a channel is provided between the two for the sensor unit covering the metal spiral armored casing to pass through; the upper mold sealing gasket group is arranged on the side of the upper mold close to the lower mold, and the lower mold sealing gasket group is arranged on the side of the lower mold close to the upper mold, and when the upper mold and the lower mold are clamped, the upper mold sealing gasket group and the lower mold sealing gasket group abut against the outer side of the metal spiral armored casing.

[0008] Preferably, the upper mold includes a glue injection inlet chamber and a glue injection outlet chamber, and the glue injection inlet chamber and the glue injection outlet chamber are cavity structures arranged inside the upper mold and are connected to each other; the glue inlet of the glue injection inlet chamber is connected to the glue outlet of the glue injection unit, and the glue outlet of the glue injection outlet chamber is connected to the gap of the metal spiral armor rotating sleeve in the tensioned state.

[0009] Preferably, the upper mold sealing gasket group and the lower mold sealing gasket group each include a pair of semi-annular sealing gaskets. When the upper mold and the lower mold are clamped, a sealed glue injection area is formed between the two sealing gaskets in the upper mold sealing gasket group. When the metal spiral armored sleeve is in a tensioned state, the solidified glue exported by the glue injection unit is injected into the gap between the metal spiral armored rotating sleeve and the sensing unit through the glue injection inlet cavity, the glue injection outlet cavity, and the gap between the metal spiral armored sleeve.

[0010] Preferably, the clamping unit includes a first finger cylinder, a first clamp, a second finger cylinder, a second clamp and a number one, three-position, five-way solenoid valve; the movable clamping end of the first finger cylinder is provided with a first clamp, the movable clamping end of the second finger cylinder is provided with a second clamp, the number one, three-position, five-way solenoid valve is connected to the air circuit of the air source assembly, the number one, three-position, five-way solenoid valve is electrically connected to the first finger cylinder and the second finger cylinder, and is used to control the synchronous clamping operation of the first finger cylinder and the second finger cylinder.

[0011] Preferably, when the first three-position five-way solenoid valve drives the first finger cylinder and the second finger cylinder to clamp synchronously, the first fixture and the second fixture clamp both ends of the sensing unit covered with the metal spiral armored sleeve.

[0012] Preferably, the tensioning unit includes a first guide rod cylinder and a second three-position five-way solenoid valve. The second three-position five-way solenoid valve is in gas circuit communication with the gas source assembly. The second three-position five-way solenoid valve is electrically connected to the first guide rod cylinder and is used to control the first guide rod cylinder to drive the second finger cylinder to move along the axis direction of the sensing unit.

[0013] Preferably, the glue injection unit includes a third finger cylinder, a first double-acting cylinder, a second guide rod cylinder, a third three-position five-way solenoid valve, a fourth three-position five-way solenoid valve, a fifth three-position five-way solenoid valve, a glue injection cylinder and a glue injection solenoid valve; the movable clamping end of the third finger cylinder is provided with an upper die and a lower die of the glue injection mold, and the side of the third finger cylinder away from the movable clamping end is connected to the first double-acting cylinder; the third three-position five-way solenoid valve is in gas circuit communication with the gas source assembly, the third three-position five-way solenoid valve is electrically connected to the third finger cylinder and is used to control the clamping operation of the third finger cylinder; the fourth three-position five-way solenoid valve is in gas circuit communication with the gas source assembly, the fourth three-position five-way solenoid valve is electrically connected to the second guide rod cylinder and is used to control the second guide rod cylinder to drive the third finger cylinder to move along the axis direction of the sensing unit; the fifth three-position five-way solenoid valve is in gas circuit communication with the gas source assembly, the fifth three-position five-way solenoid valve is electrically connected to the first double-acting cylinder and is used to control the first double-acting cylinder to drive the third finger cylinder to move along the direction perpendicular to the axis of the sensing unit; the glue outlet of the glue injection cylinder is communicated with the glue injection cavity of the upper die, and the glue injection solenoid valve is electrically connected to the glue injection cylinder and is used to control the glue injection cylinder to inject glue into the upper die.

[0014] Preferably, the curing unit includes a UV light source, a second double-acting cylinder, a third guide rod cylinder and a sixth three-position five-way solenoid valve; the second double-acting cylinder is arranged parallel to the first double-acting cylinder, and the movable end of the second double-acting cylinder is provided with a UV light source. The sixth three-position five-way solenoid valve is in gas circuit communication with the gas source assembly, the sixth three-position five-way solenoid valve is electrically connected to the second double-acting cylinder and is used to control the second double-acting cylinder to drive the UV light source to move along the direction perpendicular to the axis of the sensing unit; the fourth three-position five-way solenoid valve is also electrically connected to the third guide rod cylinder and is used to control the third guide rod cylinder to drive the second double-acting cylinder to move along the axis direction of the sensing unit; after the glue injection area is filled with glue, the fourth three-position five-way solenoid valve drives the second guide rod cylinder and drives the glue injection unit to move away from the glue injection area. At the same time, the fourth three-position five-way solenoid valve drives the third guide rod cylinder and drives the UV light source to move close to the glue injection area, and the UV light source irradiates and cures the cured glue in the glue injection area.

[0015] Preferably, the gas source assembly includes a compressed gas source and a stop valve. A stop valve is provided at the air outlet of the compressed gas source. The compressed gas source is used to supply driving gas to the clamping unit, the tensioning unit, the glue injection unit, and the curing unit, and the introduction flow of the driving gas is controlled by the stop valve.

[0016] The beneficial effects of the present invention are as follows: Different from the prior art, the present invention provides a packaging system applicable to the internal sensing unit of a metal spiral armored sleeve. Through the coordinated setting of each component of the gas source assembly, the glue injection mold, the clamping unit, the tensioning unit, the glue injection unit, and the curing unit, the automatic packaging of the internal sensing unit of the metal spiral armored sleeve is realized, the production efficiency is significantly improved, and at the same time, the curing consistency of the packaged product is significantly improved, which is conducive to large-scale popularization and application. Description of the Drawings

[0017] Figure 1 is a schematic diagram of an embodiment of the packaging system applicable to the internal sensing unit of the metal spiral armored sleeve in the present invention;

[0018] Figure 2 is a schematic diagram of the glue injection mold before and after glue injection in an embodiment of the packaging system applicable to the internal sensing unit of the metal spiral armored sleeve in the present invention: a is before glue injection, and b is after glue injection;

[0019] Figure 3 is a schematic diagram of the curing of the packaging system applicable to the internal sensing unit of the metal spiral armored sleeve in the present invention;

[0020] In the figure: 1 - gas source assembly, 11 - compressed gas source, 12 - stop valve; 2 - glue injection mold, 21 - upper mold, 211 - glue injection inlet cavity, 212 - glue injection outlet cavity, 22 - lower mold, 23 - upper mold gasket group, 24 - lower mold gasket group; 3 - clamping unit, 31 - first finger cylinder, 32 - first fixture, 33 - second finger cylinder, 34 - second fixture, 35 - first three-position five-way solenoid valve; 4 - tensioning unit, 41 - first guide rod cylinder, 42 - second three-position five-way solenoid valve; 5 - glue injection unit, 51 - third finger cylinder, 52 - first double-acting cylinder, 53 - second guide rod cylinder, 54 - third three-position five-way solenoid valve, 55 - fourth three-position five-way solenoid valve, 56 - fifth three-position five-way solenoid valve, 57 - glue injection cylinder, 58 - glue injection solenoid valve; 6 - curing unit, 61 - UV light source, 62 - second double-acting cylinder, 63 - third guide rod cylinder, 64 - sixth three-position five-way solenoid valve; 7 - sensing unit wrapped with a metal spiral armored sleeve, 71 - metal spiral armored sleeve, 72 - sensing unit; 8 - curing glue. Detailed Embodiments

[0021] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figure 1 , Figure 1 FIG. is a schematic diagram of an embodiment of a packaging system applicable to an internal sensing unit of a metal spiral armored sleeve in the present invention. The packaging system applicable to the internal sensing unit of the metal spiral armored sleeve in the present invention includes: a gas source assembly 1, a glue injection mold 2, a clamping unit 3, a tensioning unit 4, a glue injection unit 5, and a curing unit 6; both ends of the sensing unit 7 wrapped with the metal spiral armored sleeve are movably clamped by the clamping ends of the tensioning unit 4, and the metal spiral armored sleeve 71 changes its tension and relaxation state axially through the tensioning unit 4; the glue injection mold 2 is movably arranged at the movable clamping end of the glue injection unit 5. When the glue injection mold 2 clamps the area to be packaged of the sensing unit 7 wrapped with the metal spiral armored sleeve, the glue injection unit 5 injects a curing glue 8 between the metal spiral armored sleeve 71 and the sensing unit 72; when the glue injection mold 2 does not clamp the area to be packaged of the sensing unit 7 wrapped with the metal spiral armored sleeve, the curing unit 4 cures the curing glue 8; the clamping unit 3, the tensioning unit 4, the glue injection unit 5, and the curing unit 6 are all in gas circuit communication with the gas source assembly 1 and are driven by the gas source assembly 1 to operate. The following separately elaborates on each component of the above packaging system.

[0023] Specifically, please refer to Figure 2 , the glue injection mold 2 includes an upper mold 21, a lower mold 22, an upper mold gasket group 23, and a lower mold gasket group 24; the upper mold 21 and the lower mold 22 are correspondingly movably clamped, and there is a hole for the sensing unit 7 wrapped with the metal spiral armored sleeve to pass through when they are clamped; the upper mold gasket group 23 is arranged on the side of the upper mold 21 close to the lower mold 22, and the lower mold gasket group 24 is arranged on the side of the lower mold 22 close to the upper mold 21. When the upper mold 21 and the lower mold 22 are clamped, the upper mold gasket group 23 and the lower mold gasket group 24 abut against the outer side of the metal spiral armored sleeve 71.

[0024] In this embodiment, the upper mold 21 includes a glue injection inlet cavity 211 and a glue injection outlet cavity 212. The glue injection inlet cavity 211 and the glue injection outlet cavity 212 are cavity structures arranged inside the upper mold 21 and are in communication with each other. The glue inlet of the glue injection inlet cavity 211 is in communication with the glue outlet of the glue injection unit 5, and the glue outlet of the glue injection outlet cavity 212 is in communication with the gap of the metal spiral armored sleeve 71 in the tensioned state. Both the upper mold gasket group 23 and the lower mold gasket group 24 include a pair of semi-circular gaskets. When the upper mold 21 and the lower mold 22 are clamped, a sealed glue injection area is formed between the two gaskets in the upper mold gasket group 23. Since the glue injection area is a sealed and fixed structure, it can not only effectively prevent the problems of pressure relief and glue leakage during glue injection, but also enable the filled cured glue in different glue injection areas to have high consistency after glue injection. The state before glue injection is as shown in Figure 2 Figure a in. When glue injection is required, the metal spiral armored sleeve 71 is in the tensioned state. The glue injection unit 5 discharges the liquid cured glue 8, which successively passes through the glue injection inlet cavity 211, the glue injection outlet cavity 212, and the gap of the metal spiral armored sleeve 71, and is injected between the metal spiral armored sleeve 71 and the sensing unit 72 until the glue injection area is filled with the liquid cured glue 8. The state after glue injection is as shown in Figure 2 Figure b in.

[0025] Specifically, the clamping unit 3 includes a first finger cylinder 31, a first clamp 32, a second finger cylinder 33, a second clamp 34, and a first three-position five-way solenoid valve 35. The movable clamping end of the first finger cylinder 31 is provided with the first clamp 32, and the movable clamping end of the second finger cylinder 33 is provided with the second clamp 34. The first three-position five-way solenoid valve 35 is in gas circuit communication with the gas source assembly 1, and the first three-position five-way solenoid valve 35 is electrically connected to both the first finger cylinder 31 and the second finger cylinder 33 and is used to control the synchronous clamping operation of the first finger cylinder 31 and the second finger cylinder 33. By driving the first finger cylinder 31 and the second finger cylinder 33 to clamp synchronously through the first three-position five-way solenoid valve 35, the two ends of the sensing unit 7 wrapped with the metal spiral armored sleeve are clamped by the first clamp 32 and the second clamp 34 respectively, so as to keep the sensing unit 7 wrapped with the metal spiral armored sleeve stable during the glue injection and curing processes. The glue injection area is located between the first clamp 32 and the second clamp 34.

[0026] Specifically, the tensioning unit 4 includes a first guide rod cylinder 41 and a second five-port three-position solenoid valve 42. The second five-port three-position solenoid valve 42 is in pneumatic connection with the air source assembly 1 and is electrically connected to the first guide rod cylinder 41. In this embodiment, the second five-port three-position solenoid valve 42 is arranged adjacent to the first guide rod cylinder 41 and is used to control the first guide rod cylinder 41 to drive the second finger cylinder 33 to move along the axis direction of the sensing unit 72. That is, the first finger cylinder 31 controls the first fixture 32 to hold one end of the metal spiral armored sleeve 71 stationary, while the tensioning unit 4 changes the clamping position of the other end of the metal spiral armored sleeve 71, so that the metal spiral armored sleeve 71 can be changed between the tensioning and contracting states. In other embodiments, a similar setting method can also be adopted, and the tensioning unit 4 is arranged adjacent to the first finger cylinder 31, and its working mode is similar to the foregoing embodiment, which will not be elaborated here.

[0027] Specifically, the glue injection unit 2 includes a third finger cylinder 51, a first double-acting cylinder 52, a second guide rod cylinder 53, a third five-port three-position solenoid valve 54, a fourth five-port three-position solenoid valve 55, a fifth five-port three-position solenoid valve 56, a glue injection cylinder 57 and a glue injection solenoid valve 58. The movable clamping end of the third finger cylinder 51 is provided with the upper die 21 and the lower die 22 of the glue injection die 2. The side of the third finger cylinder 51 far from the movable clamping end is connected to the first double-acting cylinder 52. The third five-port three-position solenoid valve 54 is in pneumatic connection with the air source assembly 1 and is electrically connected to the third finger cylinder 51 and is used to control the clamping operation of the third finger cylinder 51. The fourth five-port three-position solenoid valve 55 is in pneumatic connection with the air source assembly 1 and is electrically connected to the second guide rod cylinder 53 and is used to control the second guide rod cylinder 53 to drive the third finger cylinder 51 to move along the axis direction of the sensing unit 72. The fifth five-port three-position solenoid valve 56 is in pneumatic connection with the air source assembly 1 and is electrically connected to the first double-acting cylinder 52 and is used to control the first double-acting cylinder 52 to drive the third finger cylinder 51 to move along the direction perpendicular to the axis of the sensing unit 72, that is, to control the glue injection die 2 to approach or depart from the metal spiral armored sleeve 71. The glue outlet of the glue injection cylinder 57 is communicated with the glue injection cavity 211 of the upper die 21, and the glue injection solenoid valve 58 is electrically connected to the glue injection cylinder 57 and is used to control the glue injection cylinder 57 to inject glue into the upper die 21.

[0028] Specifically, the curing unit 6 includes a UV light source 61, a second double-axis cylinder 62, a third guide rod cylinder 63, and a six-way three-position five-port solenoid valve 64; the second double-axis cylinder 62 is arranged parallel to the first double-axis cylinder 52, and the movable end of the second double-axis cylinder 62 is provided with the UV light source 61. The six-way three-position five-port solenoid valve 64 is in gas circuit connection with the gas source assembly 1, and is electrically connected to the second double-axis cylinder 62, and is used to control the second double-axis cylinder 62 to drive the UV light source 61 to move along the direction perpendicular to the axis of the sensing unit 72. The four-way three-position five-port solenoid valve 55 is also electrically connected to the third guide rod cylinder 63, and is used to control the third guide rod cylinder 63 to drive the second double-axis cylinder 62 to move along the axis direction of the sensing unit 72. The four-way three-position five-port solenoid valve 55 simultaneously controls the operation of driving the second guide rod cylinder 53 and the third guide rod cylinder 63. After the glue injection area is filled with glue, the four-way three-position five-port solenoid valve 55 drives the second guide rod cylinder 53 and drives the glue injection unit 5 to leave the glue injection area. At the same time, the four-way three-position five-port solenoid valve 55 drives the third guide rod cylinder 63 and drives the UV light source 61 to move close to the glue injection area, and the UV light source 61 irradiates and cures the cured glue 8 in the glue injection area. The curing process is as Figure 3 shown, thereby completing the curing and encapsulation of the area to be encapsulated. That is to say, the switching between the glue injection station and the curing station can be realized through the four-way three-position five-port solenoid valve 55, and the sensing unit covered with the metal spiral armored sleeve will not change its position and state.

[0029] Specifically, the gas source assembly 1 includes a compressed gas source 11 and a stop valve 12. A stop valve 12 is provided at the air outlet of the compressed gas source 11. The compressed gas source 11 is used to supply driving gas to the clamping unit 3, the tensioning unit 4, the glue injection unit 5, and the curing unit 6, and the stop valve 12 controls the introduction flow rate and on / off of the driving gas. Among them, the selection of the gas of the compressed gas source 11 and the flow rate of the compressed gas source 11 supplied to each component unit can be adaptively selected according to actual needs, and will not be limited here.

[0030] Furthermore, based on the above structural description of the encapsulation system applicable to the internal sensing unit of the metal spiral armored sleeve, the following describes its working method in detail:

[0031] (1) Open the stop valve 12 to allow the compressed gas source 11 to be introduced into various cylinders and three-position five-port solenoid valves to provide power for the encapsulation system.

[0032] (2) The first finger cylinder 31 and the second finger cylinder 33 are simultaneously driven by a first three-position five-way solenoid valve 35, and the two ends of the metal spiral armored sleeve 71 are clamped by the first clamp 32 and the second clamp 34 respectively, so that the area to be encapsulated is located between the first clamp 32 and the second clamp 34; the first guide rod cylinder 41 is driven by a second three-position five-way solenoid valve 42 to push the second finger cylinder 33 outward to an appropriate position, so that the metal spiral modified sleeve 71 changes from a contracted state to a stretched state.

[0033] (3) After the metal spiral modified sleeve 71 is in the preset stretched state, the first double-axis cylinder 52 is driven by a fifth three-position five-way solenoid valve 56 to move the injection mold 2 to the area to be encapsulated of the metal spiral modified sleeve 71; the third finger cylinder 51 is driven by a third three-position five-way solenoid valve 54 to clamp the area to be encapsulated of the metal spiral modified sleeve 71 with the upper mold 21 and the lower mold 22 of the injection mold 2. At the same time, under the surrounding action of the upper mold gasket group 23 and the lower mold gasket group 24, a sealed injection area is formed.

[0034] (4) The injection cylinder 57 is driven by an injection solenoid valve 58, so that the liquid curing glue 8 in the injection cylinder 57 sequentially passes through the injection inlet cavity 211, the injection outlet cavity 212, and the gap of the metal spiral armored sleeve 71, and is injected between the metal spiral armored sleeve 71 and the sensing unit 72 until the injection area is filled with the liquid curing glue 8, then the injection is completed.

[0035] (5) After the injection is completed, first the third finger cylinder 51 is driven by a third three-position five-way solenoid valve 54 to make the upper mold 21 and the lower mold 22 of the injection mold 2 no longer clamp the area to be encapsulated of the metal spiral modified sleeve 71, and then the first double-axis cylinder 52 is driven by a fifth three-position five-way solenoid valve 56 to move the injection mold 2 away from the area to be encapsulated of the metal spiral modified sleeve 71; then the second guide rod cylinder 53 is driven by a fourth three-position five-way solenoid valve 55 and drives the injection unit 5 away from the injection area, and at the same time the third guide rod cylinder 63 is driven by a fourth three-position five-way solenoid valve 55 and drives the UV light source 61 to move close to the injection area, thus completing the switching between the injection station and the curing station.

[0036] (6) The third guide rod cylinder 63 is driven by a sixth three-position five-way solenoid valve 64 to move the UV light source at its end to an appropriate position above the area to be encapsulated of the metal spiral modified sleeve 71. Through the irradiation of the UV light source, the liquid curing glue in the injection area is transformed into a solid state, thus completing the curing encapsulation of the area to be encapsulated once. When the injection and encapsulation operation is carried out again, first switch the injection station and the curing station, and then repeat the above operation, and the specific process will not be elaborated.

[0037] Using the above encapsulation system applicable to the internal sensing unit of the metal spiral armored sleeve for encapsulation operation, its advantages are as follows: First, the glue injection area is a sealed and fixed structure, which not only effectively avoids the problems of pressure relief and glue leakage during glue injection, but also enables the filling of the cured glue in different glue injection areas to have high consistency after glue injection; Second, the glue injection area not only well fills the gap between the metal spiral armored sleeve and the sensing unit, but also fills the gap of the metal spiral armored sleeve in the tension state, strengthening the encapsulation and fixing effect; Third, after injecting and curing the glue injection area, the pitch gap of the metal spiral armored sleeve returns to the initial state, so that its mechanical properties and the extra length of the internal sensing unit are not affected. When performing encapsulation operations for different glue injection areas, the consistency of the product after curing encapsulation can be further improved; Fourth, this encapsulation device realizes the automated production of the internal sensing unit of the spiral armored sleeve, and the production efficiency is significantly improved, which is conducive to large-scale popularization and application.

[0038] Differing from the prior art, the present invention provides an encapsulation system applicable to the internal sensing unit of the metal spiral armored sleeve. Through the coordinated setting of each component such as the air source assembly, the glue injection mold, the clamping unit, the tensioning unit, the glue injection unit, and the curing unit, the automated encapsulation of the internal sensing unit of the metal spiral armored sleeve is realized, the production efficiency is significantly improved, and at the same time, the curing consistency of the encapsulated product is significantly improved, which is conducive to large-scale popularization and application.

[0039] The above embodiments only represent the implementation modes of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent shall be subject to the appended claims.

Claims

1. An encapsulation system applicable to the internal sensing unit of a metal spiral armored sleeve, characterized in that It includes an air source component, a glue injection mold, a clamping unit, a tensioning unit, a glue injection unit and a curing unit; Both ends of the sensing unit coated with the metal spiral armored sleeve are movably clamped by the clamping ends of the tensioning unit, and the metal spiral armored sleeve changes its tension and relaxation state along the axial direction through the tensioning unit; The glue injection mold is movably arranged at the movable clamping end of the glue injection unit. When the glue injection mold clamps the to-be-packaged portion of the sensor unit coated with the metal spiral armored sleeve, the glue injection unit injects curing glue between the metal spiral armored sleeve and the sensor unit; When the glue injection mold does not clamp the to-be-packaged portion of the sensor unit coated with the metal spiral armored casing, the curing unit cures the curing glue; The clamping unit, the tensioning unit, the glue injection unit and the curing unit are all connected to the gas circuit of the gas source component and driven to operate by the gas source component; The injection mold comprises an upper mold, a lower mold, an upper mold sealing gasket group and a lower mold sealing gasket group; the upper mold and the lower mold are correspondingly movably clamped, and when clamped, a channel for the sensor unit coated with the metal spiral armored casing to pass through is arranged between the two; the upper mold sealing gasket group is arranged on the side of the upper mold close to the lower mold, and the lower mold sealing gasket group is arranged on the side of the lower mold close to the upper mold, and when the upper mold and the lower mold are clamped, the upper mold sealing gasket group and the lower mold sealing gasket group are in contact with the outer side of the metal spiral armored casing; The upper mold comprises a glue injection inlet cavity and a glue injection outlet cavity, the glue injection inlet cavity and the glue injection outlet cavity are cavity structures arranged inside the upper mold, and are connected to each other; the glue inlet of the glue injection inlet cavity is connected to the glue outlet of the glue injection unit, and the glue outlet of the glue injection outlet cavity is connected to the gap of the metal spiral armored casing in a tensioned state; The upper die sealing gasket group and the lower die sealing gasket group each include a pair of semi-annular sealing gaskets. When the upper die and the lower die are clamped together, a sealed glue injection area is formed between the two sealing gaskets in the upper die sealing gasket group. When the metal spiral armored sleeve is in a tensioned state, the curing glue guided out by the glue injection unit is sequentially injected into the gap between the metal spiral armored sleeve and the sensing unit through the glue injection inlet cavity, the glue injection outlet cavity, and the metal spiral armored sleeve. The clamping unit includes a first finger cylinder, a first clamp, a second finger cylinder, a second clamp, and a number one, three-position, five-way solenoid valve; The movable clamping end of the first finger cylinder is provided with the first clamp, and the movable clamping end of the second finger cylinder is provided with the second clamp. The No. 1, three-position, five-way solenoid valve is connected to the air circuit of the air source component. The No. 1, three-position, five-way solenoid valve is electrically connected to the first finger cylinder and the second finger cylinder, and is used to control the synchronous clamping operation of the first finger cylinder and the second finger cylinder.

2. The encapsulation system applicable to the internal sensing unit of the metal spiral armored sleeve according to claim 1, characterized in that When the No. 1 three-position five-way solenoid valve drives the first finger cylinder and the second finger cylinder to clamp synchronously, the first clamp and the second clamp clamp the two ends of the sensor unit coated with the metal spiral armored casing.

3. The encapsulation system applicable to the internal sensing unit of the metal spiral armored sleeve according to claim 1, characterized in that, The tensioning unit includes a first guide rod cylinder and a No. 2 five-way three-position solenoid valve. The No. 2 five-way three-position solenoid valve is in gas circuit connection with the air source assembly, and is electrically connected to the first guide rod cylinder, and is used to control the first guide rod cylinder to drive the second finger cylinder to move along the axis direction of the sensing unit.

4. The encapsulation system for the internal sensing unit applicable to the metal spiral armored sleeve according to claim 1, characterized in that, The glue injection unit includes a third finger cylinder, a first double-acting cylinder, a second guide rod cylinder, a No. 3 five-way three-position solenoid valve, a No. 4 five-way three-position solenoid valve, a No. 5 five-way three-position solenoid valve, a glue injection cylinder and a glue injection solenoid valve; The movable clamping end of the third finger cylinder is provided with an upper mold and a lower mold of the glue injection mold. The side of the third finger cylinder away from the movable clamping end is connected to the first double-acting cylinder; The No. 3 five-way three-position solenoid valve is in gas circuit connection with the air source assembly, and is electrically connected to the third finger cylinder, and is used to control the clamping operation of the third finger cylinder; The No. 4 five-way three-position solenoid valve is in gas circuit connection with the air source assembly, and is electrically connected to the second guide rod cylinder, and is used to control the second guide rod cylinder to drive the third finger cylinder to move along the axis direction of the sensing unit; The No. 5 five-way three-position solenoid valve is in gas circuit connection with the air source assembly, and is electrically connected to the first double-acting cylinder, and is used to control the first double-acting cylinder to drive the third finger cylinder to move along the direction perpendicular to the axis of the sensing unit; The glue outlet of the glue injection cylinder is communicated with the glue injection inlet cavity of the upper mold. The glue injection solenoid valve is electrically connected to the glue injection cylinder, and is used to control the glue injection cylinder to inject glue into the upper mold.

5. The encapsulation system applicable to the internal sensing unit of the metal spiral armored sleeve according to claim 4, characterized in that, The curing unit includes a UV light source, a second double-acting cylinder, a third guide rod cylinder and a No. 6 five-way three-position solenoid valve; The second double-acting cylinder is arranged parallel to the first double-acting cylinder, and the movable end of the second double-acting cylinder is provided with the UV light source. The No. 6 five-way three-position solenoid valve is in gas circuit connection with the air source assembly, and is electrically connected to the second double-acting cylinder, and is used to control the second double-acting cylinder to drive the UV light source to move along the direction perpendicular to the axis of the sensing unit; The No. 4 five-way three-position solenoid valve is also electrically connected to the third guide rod cylinder, and is used to control the third guide rod cylinder to drive the second double-acting cylinder to move along the axis direction of the sensing unit; After the glue injection area is filled with glue, the No. 4 five-way three-position solenoid valve drives the second guide rod cylinder and drives the glue injection unit to move away from the glue injection area. At the same time, the No. 4 five-way three-position solenoid valve drives the third guide rod cylinder and drives the UV light source to move to a position close to the glue injection area, and the UV light source irradiates and cures the cured glue in the glue injection area.

6. The encapsulation system for the internal sensing unit applicable to the metal spiral armored sleeve according to claim 1, characterized in that, The air source assembly includes a compressed air source and a stop valve. The stop valve is provided at the air outlet of the compressed air source. The compressed air source is used to provide driving gas for the clamping unit, the tensioning unit, the glue injection unit and the curing unit, and the introduction flow of the driving gas is controlled by the stop valve.

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