Ultraviolet lamp vacuuming process

Abstract

An ultraviolet lamp vacuuming process includes the following steps: step 1, placing multiple glass lamp tubes on a lamp tube vacuuming device, and connecting the interior of the glass lamp tubes with an exhaust / gas filling device; step 2, connecting the power connection ends of each glass lamp tube together through a power connection component to form a lamp tube combination circuit, and at the same time connecting the lamp tube combination circuit to an external detection power supply; step 3, turning on the heating device of the lamp tube vacuuming device, and using the heating device to simultaneously perform flame spraying heating on the upper and lower sides of multiple glass lamp tubes; step 4, after the glass lamp tubes are heated, vacuumizing the glass lamp tubes; step 5, when the vacuum degree of the glass lamp tubes reaches a preset value, filling the glass lamp tubes with inert gas, and then using a flamethrower to fuse and seal the glass lamp tubes. The present invention can perform flame spraying heating on the upper and lower sides of multiple glass lamp tubes, so that the glass lamp tubes are rapidly heated and evenly heated, and effectively improve the heating efficiency and heating exhaust quality of the glass lamp tubes.

Description

Technical Field

[0001] The invention relates to the technical field of ultraviolet lamp tube production, and in particular to a vacuuming process for an ultraviolet lamp. Background Art

[0002] However, the operation of the exhaust process of the glass tube of the ultraviolet lamp will have a great impact on the quality of the tube. Because there are many impurity gases on the surface and inside of the quartz glass tube, the impurity gases must be discharged through baking and heating. The baking temperature must reach above 350℃, and it is required to reach this temperature in a short time to achieve a good exhaust effect. In addition, during the exhaust process, it is necessary to continue heating to ensure that the quartz tube does not absorb impurity gases.

[0003] The Chinese patent document with the announcement number CN205666226U discloses a heating and cooling device for exhaust of ultraviolet tubes, including a servo motor, a screw, a ball nut, a vertical support rod, and a mobile bracket. The servo motor is connected to the screw, the ball nut is fixed on the mobile bracket, and the screw and the ball nut are threaded together; the vertical support rod is slidably assembled with the mobile bracket; a sensor is installed on the vertical support rod, and a flame head is fixed on the mobile bracket, and the flame head is connected to the gas pipeline. However, the mobile bracket of the above technical solution is located below the glass lamp tube, and the flame head can only spray fire to heat the bottom of the glass lamp tube, and the heating efficiency of the glass lamp tube is slow. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides an ultraviolet lamp vacuuming process.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] An ultraviolet lamp vacuuming process comprises the following steps:

[0007] Step 1, placing multiple glass lamp tubes on the lamp tube vacuuming device, and welding the exhaust process pipe of each glass lamp tube to multiple connecting pipes of the exhaust / inflation pipeline one by one, so that the interior of the glass lamp tube is connected with the exhaust / inflation device;

[0008] Step 2, connecting the power connection ends of the glass lamp tubes together through the power connection component to form a lamp tube combination circuit, and at the same time connecting the lamp tube combination circuit to an external detection power supply;

[0009] Step 3, turning on the heating device of the lamp tube vacuuming equipment, and using the heating device to spray fire on the upper and lower sides of the plurality of glass lamp tubes at the same time, wherein the heating device comprises a lower spraying component for spraying fire below the glass lamp tubes and an upper spraying component for spraying fire above the glass lamp tubes;

[0010] Step 4: After the glass lamp tube is heated, the exhaust unit of the exhaust / inflation device immediately performs a vacuum process on the glass lamp tube;

[0011] Step 5. When the vacuum degree of the glass lamp tube reaches the preset value, open the inflation unit of the exhaust / inflation device to fill the glass lamp tube with inert gas, and then use a flamethrower to fuse and seal the exhaust process tube of the glass lamp tube to complete the vacuum process of the glass lamp tube.

[0012] In the present invention, in step 2, an electric spark vacuum leak detector is first used to detect whether there is a leak between the exhaust process tube of the glass lamp tube and the connecting tube of the exhaust / inflation pipe. If there is a leak, the connection between the exhaust process tube and the connecting tube of the exhaust / inflation pipe is further repaired by welding equipment to eliminate the leak between the exhaust process tube of the glass lamp tube and the connecting tube of the exhaust / inflation pipe.

[0013] In the present invention, in step 4, the detection power supply is started to electrically decompose the cathode electron powder in the glass lamp tube to activate the cathode electron powder.

[0014] In the present invention, in step 4, the gas filling unit of the exhaust / filling device introduces inert gas into the glass lamp tube for flushing, and then the exhaust unit of the exhaust / filling device extracts the inert gas.

[0015] In the present invention, the temperature of the glass lamp tube after heating is above 450°C.

[0016] Beneficial effects of the present invention: The present invention can perform flame heating on the upper and lower sides of multiple glass lamp tubes through the upper and lower flame spraying components of the heating device, so that the glass lamp tubes can be quickly heated and evenly heated, effectively improving the heating efficiency and heating exhaust quality of the glass lamp tubes. In addition, the present invention can perform heating, exhausting and inflating processes on multiple lamp tubes at the same time on the same vacuum equipment, without the need to transfer the glass lamp tubes, greatly improving production efficiency and yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 The three-dimensional Figure 1 ;

[0019] Figure 2 The three-dimensional Figure 2 ;

[0020] Figure 3 is a cross-sectional view of this embodiment;

[0021] Figure 4 It is a top view of this embodiment. DETAILED DESCRIPTION

[0022] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] Reference Figure 1-4 , a UV lamp vacuuming process, comprising the following steps:

[0024] Step 1, placing a plurality of glass lamp tubes 300 on a lamp tube vacuuming device, and welding the exhaust process pipe 301 of each glass lamp tube 300 to a plurality of connecting pipes 42 of the exhaust / inflation pipeline 4 one by one, so that the interior of the glass lamp tube 300 is connected to the exhaust / inflation device 3;

[0025] Step 2: First, use an electric spark vacuum leak detector to detect whether there are leaks between the exhaust process tube 301 of the glass lamp tube 300 and the multiple connecting tubes 42 of the exhaust / inflating pipeline 4. If there are leaks, continue to repair the connection between the exhaust process tube 301 and the multiple connecting tubes 42 of the exhaust / inflating pipeline 4 through a welding device to eliminate the leaks between the exhaust process tube 301 of the glass lamp tube 300 and the multiple connecting tubes 42 of the exhaust / inflating pipeline 4; then connect the power connection ends of each glass lamp tube 300 together through a power connection component to form a lamp tube combination circuit, and at the same time connect the lamp tube combination circuit to an external detection power supply;

[0026] Step 3, turn on the heating device 2 of the lamp tube vacuuming device, and use the heating device 2 to simultaneously perform flame heating on the upper and lower sides of the plurality of glass lamp tubes 300, the heating time is 1-3 minutes, preferably 1.5 minutes, and the temperature of the heated glass lamp tubes 300 is above 450° C.;

[0027] Step 4: After the glass lamp tube 300 is heated, the exhaust unit of the exhaust / inflating device 3 immediately evacuates the glass lamp tube 300; at the same time, the detection power supply is started to electrically decompose the cathode electron powder in the glass lamp tube 300 to activate the cathode electron powder; in addition, during the vacuuming process, the inflation unit of the exhaust / inflating device 3 introduces inert gas into the glass lamp tube 300 for flushing, and then the exhaust unit of the exhaust / inflating device 3 extracts the inert gas again. In this process, flushing is required at least twice, preferably three times, so as to improve the production quality;

[0028] Step 5. When the vacuum degree of the glass lamp tube 300 reaches a preset value, which is 8×10-4Pa, open the inflation unit of the exhaust / inflation device 3 to fill the glass lamp tube 300 with inert gas, and then use a flamethrower to fuse and seal the exhaust process tube 301 of the glass lamp tube 300 to complete the vacuum pumping process of the glass lamp tube 300.

[0029] As a preferred embodiment, the lamp tube vacuum equipment includes a frame 1, a heating device 2, and an exhaust / inflation device 3. The top of the frame 1 is divided into an operating area 100 and a heating area 200 which are adjacently arranged in front and behind. An exhaust / inflation pipe 4 is provided in the operating area 100. The exhaust / inflation pipe 4 is connected to the exhaust / inflation device 3. The exhaust / inflation pipe 4 is used to connect the exhaust process pipe 301 of the glass lamp tube 300 for exhaust and inflation. The exhaust / inflation pipe 4 includes a main air pipe 41 and a plurality of connecting pipes 42 connected to the main air pipe 41. The plurality of connecting pipes 42 are arranged on the main air pipe 41 from left to right. The main air pipe 41 is connected to the exhaust / inflation device 3. The connecting pipe 42 is used to connect the exhaust process pipe 301 of the glass lamp tube 300.

[0030] Furthermore, the frame 1 is provided with two supporting brackets 5 respectively arranged on the left and right sides of the frame 1, and the upper parts of the two supporting brackets 5 are jointly provided with a supporting rod 50 located above the heating zone 200, and the supporting rod 50 is used to support one end of the glass lamp tube 300. After the exhaust process pipe 301 of the glass lamp tube 300 is connected to the connecting pipe 42, the end of the glass lamp tube 300 away from the exhaust process pipe 301 is placed on the supporting rod 50, so that the glass lamp tube 300 is suspended between the upper flame spraying assembly 213 and the lower flame spraying assembly 214, so that the upper flame spraying assembly 213 and the lower flame spraying assembly 214 can heat the upper and lower sides of the glass lamp tube 300 with flame spraying; the heating device 2 includes two flame spraying The flame spraying mechanism 21 is a flame spraying mechanism 21, and a front-to-back moving mechanism 22 for driving the flame spraying mechanism 21 to move forward and backward. The front-to-back moving mechanism 22 is installed on the frame 1. Two flame spraying mechanisms 21 are arranged from front to back on the front-to-back moving mechanism 22. The flame spraying mechanism 21 includes two flame spraying columns 211 installed on the moving output end of the front-to-back moving mechanism 22, a lower flame spraying assembly 214 for spraying flames below the glass lamp tube 300, and an upper flame spraying assembly 213 for spraying flames above the glass lamp tube 300. The left and right ends of the upper flame spraying assembly 213 and the lower flame spraying assembly 214 are respectively connected to the two flame spraying columns 211, and the supporting rod 50 is located between the upper flame spraying assembly 213 and the lower flame spraying assembly 214. In addition, in this embodiment, the supporting rod 50 is also a quartz glass tube, so that its heat conduction efficiency is consistent with that of the glass lamp tube 300.

[0031] As a preferred embodiment, the supporting bracket 5 includes a supporting support shaft 51, a supporting adjustment seat 52, and two supporting height adjustment components 53. The two supporting height adjustment components 53 are respectively arranged on the front and rear sides of the frame 1. The supporting height adjustment component 53 includes a first optical axis fixing clamp 531, a second optical axis fixing clamp 532, a first adjustment optical axis 533, and a supporting mounting seat 534. The first optical axis fixing clamp 531 is fixedly installed on the frame 1. The lower end of the first adjustment optical axis 533 passes through the clamping hole of the first optical axis fixing clamp 531, and the upper end passes through the second optical axis fixing clamp 532; the supporting mounting seat 534 is installed on the second optical axis fixing clamp 532. On the top, the front and rear ends of the supporting support shaft 51 are respectively inserted and fixed in the supporting mounting seats 534 of the two supporting height adjustment components 53 to complete the installation of the supporting support shaft 51; the supporting adjustment seat 52 is slidably mounted on the supporting support shaft 51, and the two ends of the supporting rod 50 are respectively connected to the supporting adjustment seats 52 of the two supporting brackets 5; the supporting adjustment seat 52 includes a front and rear adjustment sleeve 521 slidably mounted on the supporting support shaft 51, and a U-shaped placement seat 522 fixed on the top of the front and rear adjustment sleeve 521, and the end of the supporting rod 50 is placed in the U-shaped placement seat 522, thereby achieving the purpose of connecting the two ends of the supporting rod 50 with the two supporting brackets 5 respectively.

[0032] After loosening the bolts on the first optical axis fixing clamp 531 or the second optical axis fixing clamp 532, the length of the first adjustment optical axis 533 passing through the hole of the first optical axis fixing clamp 531 or the height position of the second optical axis fixing clamp 532 on the first adjustment optical axis 533 can be adjusted to achieve the adjustment of the height position of the support rod 50. Moreover, the front-to-back adjustment sleeve 521 can slide and adjust the position on the support shaft 51, so that the front-to-back position of the support rod 50 relative to the support bracket 5 can be adjusted to meet the support requirements of glass lamp tubes 300 of different lengths; in addition, the front-to-back position locking bolts are threadedly connected to the front-to-back adjustment sleeve 521, and the front-to-back position locking bolts can be pressed against the outer wall of the support shaft 51, thereby locking the position of the front-to-back adjustment sleeve 521 on the support shaft 51.

[0033] As a preferred embodiment, the frame 1 is provided with a support frame 11 located below the heating zone 200, the forward and backward moving mechanism 22 includes a linear guide rail 221 installed on the support frame 11, a flame-spraying moving seat 222 slidably installed on the linear guide rail 221, and a driving mechanism for driving the flame-spraying moving seat 222 to move along the linear guide rail 221, the flame-spraying moving seat 222 is provided with a matching connecting seat 223, the flame-spraying column 211 is installed on the matching connecting seat 223; the driving mechanism is connected to the flame-spraying moving seat 222. In addition, in order to avoid fire or equipment failure caused by overheating of the heating zone 200 during the flame-spraying heating process, the flame-spraying moving seat 222 is provided with an air outlet cooling unit 228, which at least includes a fan installed on the flame-spraying moving seat 222. When the flame-spraying moving seat 222 moves, the air outlet cooling unit 228 simultaneously blows cold air to the bottom of the heating zone 200, thereby cooling the heating zone 200 by air.

[0034] In this embodiment, the driving mechanism includes a motor unit 224, a driving sprocket 225, a matching sprocket 226 and a transmission chain 227. The motor unit 224 and the matching sprocket 226 are respectively installed on the opposite ends of the support frame 11, the driving sprocket 225 is installed on the output shaft of the motor unit 224, the transmission chain 227 is connected to the flame-spraying moving seat 222, and the transmission chain 227 is meshed with the driving sprocket 225 and the matching sprocket 226. The motor unit 224 adopts a servo motor.

[0035] As a preferred embodiment, the upper flame spraying assembly 213 and the lower flame spraying assembly 214 both include a gas distribution block 201, and a plurality of flame spraying nozzles 202 are arranged on the gas distribution block 201, and the plurality of flame spraying nozzles 202 are arranged on the gas distribution block 201 at intervals from left to right, and the left and right ends of the gas distribution block 201 are respectively connected to two flame spraying columns 211, and the gas distribution block 201 is provided with a gas distribution channel for conveying gas to the flame spraying nozzle 202, and a gas inlet connected to the gas distribution channel, and the gas inlet is connected to a gas supply device and / or a cold air supply device through an air intake pipe. In this embodiment, only the gas supply device can be connected, and after the heating of the lamp tube is completed, the lamp tube is allowed to cool naturally; in other embodiments, the gas supply device and the cold air supply device can be connected at the same time. After the heating of the lamp tube is completed, cold air is sprayed to the flame spraying nozzle 202 through the cold air supply device to cool the lamp tube, thereby achieving the purpose of cooling the two flame spraying assemblies at the same time.

[0036] As a preferred embodiment, both ends of the gas distribution block 201 are connected with a height adjustment device 6, and the gas distribution block 201 is connected to the flame spraying column 211 through the height adjustment device 6, and the height adjustment device 6 is used to adjust the height position of the upper flame spraying assembly 213 and the lower flame spraying assembly 214, thereby realizing the adjustment of the flame spraying height of the upper flame spraying assembly 213 and the lower flame spraying assembly 214. In this embodiment, the height adjustment device 6 adopts a third optical axis fixing clamp, and after loosening the bolt of the third optical axis fixing clamp, the height position of the gas distribution block 201 can be adjusted, so that the height position of the flame spraying nozzle 202 also changes accordingly, thereby realizing the adjustment of the flame spraying height.

[0037] In this embodiment, the flame spraying direction of the flame spraying nozzle 202 of the upper flame spraying assembly 213 is downward, and the flame spraying direction of the flame spraying nozzle 202 of the lower flame spraying assembly 214 is upward. The flame spraying nozzle 202 of the upper flame spraying assembly 213 corresponds to the flame spraying nozzle 202 of the lower flame spraying assembly 214 one by one, so that the upper flame spraying assembly 213 and the lower flame spraying assembly 214 spray fire to the upper and lower sides of the glass lamp tube 300 respectively, so that the flame wraps the outside of the glass lamp tube 300, so that the glass lamp tube 300 is evenly heated.

[0038] As a preferred embodiment, the frame 1 is provided with a lifting and adjusting component 7 for adjusting the height position of the exhaust / inflation pipe 4, and the lifting and adjusting component 7 includes a lifting support plate 71, two fourth optical axis fixing clamps 72, and two pipe support columns 73. The two fourth optical axis fixing clamps 72 are respectively installed on the left and right sides of the frame 1, and the lower ends of the pipe support columns 73 are inserted into the inner circle of the fourth optical axis fixing clamp 72. Each fourth optical axis fixing clamp 72 corresponds to a pipe support column 73, and the two ends of the lifting support plate 71 are respectively fixedly connected to the tops of the two pipe support columns 73. A fixing structure 74 for fixing the exhaust / inflation pipe 4 is provided on the top surface of the lifting support plate 71, and the fixing structure 74 adopts a pipe clamp; after loosening the bolts of the fourth optical axis fixing clamp 72, the height position of the pipe support column 73 can be adjusted.

[0039] As a preferred embodiment, a fireproof material layer 8 is provided in the heating zone 200, and a flame-retardant groove is provided on the top surface of the heating zone 200. The fireproof material layer 8 is filled in the flame-retardant groove. The fireproof material layer 8 can be aluminum silicate wool or rock wool. The fireproof material layer 8 plays a fireproof and flame-retardant role. The high-temperature flame or spark generated during the heating process acts on the frame 1 and causes a fire accident in the equipment.

[0040] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means belongs to the protection scope of the present invention.

Claims

1. A vacuuming process using an ultraviolet lamp, characterized in that: The following steps are involved: Step 1: Place a plurality of glass lamp tubes (300) on a lamp tube vacuum pumping device, wherein the lamp tube vacuum pumping device comprises a frame (1), a heating device (2), and an exhaust / inflation device (3). The top of the frame (1) is divided into an operating area (100) and a heating area (200) which are arranged adjacent to each other in front and back. An exhaust / inflation pipe (4) is arranged in the operating area (100). The exhaust / inflation pipe (4) is connected to the exhaust / inflation device (3). ) is used to connect the exhaust process pipe (301) of the glass lamp tube (300) for exhaust and inflation, the exhaust / inflation pipeline (4) comprises a main air pipe (41) and a plurality of connecting pipes (42) connected to the main air pipe (41), the plurality of connecting pipes (42) are arranged on the main air pipe (41) from left to right, the main air pipe (41) is connected to the exhaust / inflation device (3), and the plurality of connecting pipes (42) are used to connect the exhaust process pipe (301) of the glass lamp tube (300); The frame (1) is provided with two supporting brackets (5) respectively arranged on the left and right sides of the frame (1); the upper parts of the two supporting brackets (5) are jointly provided with a supporting rod (50) located above the heating zone (200); the supporting rod (50) is used to support one end of the glass lamp tube (300); after the exhaust process pipe (301) of the glass lamp tube (300) is connected to the connecting pipe (42), the end of the glass lamp tube (300) away from the exhaust process pipe (301) is placed on the supporting rod (50), so that the glass lamp tube (300) is suspended between the upper flame spraying assembly (213) and the lower flame spraying assembly (214), so as to facilitate the upper and lower sides of the glass lamp tube (300) to be heated by the upper flame spraying assembly (213) and the lower flame spraying assembly (214); The heating device (2) comprises two flame spraying mechanisms (21), a front-to-back moving mechanism (22) for driving the flame spraying mechanisms (21) to move forward and backward, the front-to-back moving mechanism (22) being mounted on a frame (1), the two flame spraying mechanisms (21) being arranged from front to back on the front-to-back moving mechanism (22), the flame spraying mechanism (21) comprising two flame spraying columns (211) mounted on the movable output ends of the front-to-back moving mechanism (22), a lower flame spraying assembly (214) for spraying flame below the glass lamp tube (300), and a lower flame spraying assembly (215) for spraying flame below the glass lamp tube (300). An upper flame spraying assembly (213) for spraying flames above the lamp tube (300), the left and right ends of the upper flame spraying assembly (213) and the lower flame spraying assembly (214) being respectively connected to two flame spraying columns (211), and the supporting rod (50) being located between the upper flame spraying assembly (213) and the lower flame spraying assembly (214); the exhaust process pipe (301) of each glass lamp tube (300) is welded one by one to a plurality of connecting pipes (42) of the exhaust / inflation pipeline (4), so that the interior of the glass lamp tube (300) is connected to the exhaust / inflation device (3); Step 2, connecting the power connection ends of the glass lamp tubes (300) together through a power connection component to form a lamp tube combination circuit, and at the same time connecting the lamp tube combination circuit to an external detection power supply; Step 3, turning on the heating device (2) of the lamp tube vacuuming device, and using the heating device (2) to spray flames and heat the upper and lower sides of the plurality of glass lamp tubes (300) at the same time; Step 4: After the glass lamp tube (300) is heated, the exhaust unit of the exhaust / inflation device (3) immediately performs a vacuum process on the glass lamp tube (300); Step 5: When the vacuum degree of the glass lamp tube (300) reaches a preset value, the inflation unit of the exhaust / inflation device (3) is opened to inject inert gas into the glass lamp tube (300), and then the exhaust process tube (301) of the glass lamp tube (300) is melted and sealed using a flamethrower, thereby completing the vacuuming process of the glass lamp tube (300).

2. The ultraviolet lamp vacuuming process according to claim 1, characterized in that: In step 2, an electric spark vacuum leak detector is first used to detect whether there are leaks between the exhaust process pipe (301) of the glass lamp tube (300) and the multiple connecting pipes (42) of the exhaust / inflating pipeline (4); if there are leaks, the connection between the exhaust process pipe (301) and the multiple connecting pipes (42) of the exhaust / inflating pipeline (4) is repaired by welding equipment to eliminate the leaks between the exhaust process pipe (301) of the glass lamp tube (300) and the multiple connecting pipes (42) of the exhaust / inflating pipeline (4).

3. The ultraviolet lamp vacuuming process according to claim 1, characterized in that: In step 4, the detection power supply is started to electrically decompose the cathode electron powder in the glass lamp tube (300) to activate the cathode electron powder.

4. The ultraviolet lamp vacuuming process according to claim 1, characterized in that: In step 4, the gas filling unit of the exhaust / gas filling device (3) introduces inert gas into the glass lamp tube (300) for flushing, and then the exhaust unit of the exhaust / gas filling device (3) extracts the inert gas.

5. The ultraviolet lamp vacuuming process according to claim 1, characterized in that: The temperature of the glass lamp tube (300) after being heated is above 450°C.

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