A method and device for shrinking and sealing the second end of a quartz glass arc tube

Abstract

The invention discloses a second end shrinking and sealing method and device of a quartz glass arc tube. The method adopts a quartz glass tube to be placed vertically and self-rotated along the center line of the glass tube, an ignition head burns the quartz glass, and the quartz glass shrinks and adheres to a molybdenum foil electrode for sealing; the arc tube self-rotates, the fire head burns the quartz glass tube, and the centering is automatic, so as to ensure that the electrode is automatically centered after sealing; the bulb shell of the point light source arc tube is small in size, and the fire head is close to the bulb shell during sealing. The high temperature of the fire head will affect the stability of the air pressure in the bulb shell and the evaporation of liquid mercury, and a cooling device needs to be added outside the bulb shell; when the molybdenum foil electrode at the second end of the arc tube is sealed, the bulb shell is placed in a water tank containing cold ice water, the inner water tank is fixed, and the middle water tank rotates synchronously with the clamp and the arc tube; the cold ice water replenishes water into the water tank through a water replenishing port, overflows from the top surfaces of the inner water tank and the middle water tank to the outer water tank for discharge, and silicon powder generated during sealing is discharged from the overflowing water surface to prevent the silicon powder from adhering to the bulb shell of the arc tube and affecting the transparency of the bulb shell.

Description

Technical Field

[0001] The invention relates to the technical field of processing of sealing electric light source quartz glass and molybdenum foil electrodes, and in particular to a method and device for shrinking and sealing the second end of a quartz glass arc tube. Background Art

[0002] Traditional gas discharge light sources, especially special light sources, such as ultra-high pressure mercury lamps, high pressure xenon lamps, movie projection lamps and other point light sources, still have many uses. In particular, with the promotion of home projectors, the output of ultra-high pressure mercury lamps is increasing, but there are still problems with the quality of the production of such lamps.

[0003] When the arc tube is sealed with electrodes, the quartz glass bulb is placed vertically and the quartz glass is heated with a ring-shaped burner or a rotating burner. Due to the influence of factors such as the burner uniformity error, the glass tube wall thickness uniformity error, the glass tube straightness error, and the center error of the clamps at both ends, the electrode center will shift after sealing, causing the first end electrode and the second end electrode to be non-concentric, affecting the stable output of the arc, and affecting the light efficiency and photoelectric parameters. Summary of the invention

[0004] The object of the present invention is to provide a method and device for shrinking and sealing the second end electrode of a special point light source quartz glass arc tube in view of the defects of the prior art.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A method for shrinking and sealing the second end of a quartz glass arc tube, characterized in that: the quartz glass arc tube is placed vertically, the arc tube is driven to rotate along the axial direction as the rotation axis, the burner is controlled to melt the second end of the quartz glass arc tube, and the glass shrinks and fits onto the electrode molybdenum foil in the glass to form a vacuum seal; in the shrinking and sealing process of melting the quartz glass section by section, the shrinking seal of the arc tube is stretched at the same time to ensure the straightness of the shrinking seal of the arc tube; during the shrinking and sealing, the bulb of the arc tube is immersed in chilled water to prevent the high temperature of the burner from affecting the quality of the arc tube after shrinking and sealing.

[0007] Further, the following steps are included:

[0008] Step 1: Place the quartz glass arc tube with the first end electrode shrunk and sealed vertically in the water tank, and position the bulb shell height. The shrunk and sealed first end electrode is located at the bottom, the pill, liquid mercury, etc. are located in the bulb shell, and the lower clamp clamps the tail end of the first end of the quartz glass arc tube.

[0009] Step 2: The upper clamp moves downward, and the upper clamp enters the clamping position of the second end of the quartz glass arc tube, and clamps the tail of the second end of the quartz glass arc tube.

[0010] Step 3: The quartz glass arc tube rotates under the clamping of the upper and lower clamps; chilled water is injected into the water tank and continuously replenished to make the chilled water overflow from the top of the water tank to take away the silicon powder generated during shrinking; the shrinking flame melts the quartz glass at high temperature, and the quartz glass shrinks and fits to the electrode molybdenum foil inside the quartz glass. The flame moves up and the upper clamp pulls up at the same time to shrink the quartz glass and the electrode molybdenum foil section by section, so that the quartz glass arc tube can achieve reliable vacuum sealing.

[0011] A quartz glass arc tube second end shrinking and sealing device, characterized in that: applied to any of the above-mentioned quartz glass arc tube second end shrinking and sealing methods, comprising a lower clamping jaw mechanism, an upper clamping jaw mechanism, a fire head assembly, and a water tank assembly, wherein the upper clamping jaw mechanism and the lower clamping jaw mechanism are respectively arranged at the upper and lower ends of the quartz glass arc tube, and can clamp and drive the upper and lower ends of the quartz glass arc tube to rotate synchronously, the fire head assembly is arranged on the side of the quartz glass arc tube, and can generate high-temperature sintering and shrinking to seal the second end of the quartz glass arc tube, and the water tank assembly is arranged above the lower clamping jaw mechanism, and can cool the quartz glass arc tube during the shrinking and sealing process.

[0012] Furthermore, the lower clamping jaw mechanism includes a lower clamping jaw, a first parallel air clamp, a first main shaft, a first gear, a second gear, and a first servo motor. The lower clamping jaw is driven and connected to the first parallel air clamp, and the first parallel air clamp is fixedly connected to the top of the first main shaft. The first gear is coaxially arranged on the outside of the first main shaft, and the second gear is driven and connected to the driving shaft of the first servo motor. The first gear and the second gear are meshed and connected with each other. A lower chuck shell is arranged on the outside of the first main shaft, a first bearing is arranged between the lower chuck shell and the first main shaft, a first limiting flange is arranged on the outside of the first bearing, a first motor housing is connected to the lower chuck shell, the first servo motor is connected to the first motor housing, and the second gear is arranged in the first motor housing.

[0013] Furthermore, the water tank assembly includes an inner water tank, a middle water tank, and an outer water tank. The bottom of the middle water tank is fixedly connected to the first parallel air claw through a support plate. The outer water tank is arranged on the outside of the middle water tank. The outer water tank is fixedly connected to the lower chuck shell through a first support rod. The top edge of the middle water tank is provided with a flange. The outer edge of the flange extends into the outer water tank. The top of the outer water tank is higher than the top of the middle water tank. The inner water tank is arranged in the middle water tank, and the top of the inner water tank is flush with the top of the middle water tank. The inner water tank is fixedly connected to the outer water tank through a second support rod. The bottom of the inner water tank is provided with an annular gap. The inner water tank and the middle water tank are connected through the annular gap.

[0014] Furthermore, the water tank assembly also includes a water supply pipe, which is arranged in the second support rod and connected to the middle water tank, and an overflow port is arranged at the bottom of the outer water tank.

[0015] Furthermore, the lower clamp includes a front clamp portion and a rear clamp portion which are fixedly connected, the bottom center of the middle water tank is a thin-walled stainless steel barrel, the front clamp portion is arranged inside the thin-walled stainless steel barrel, and the rear clamp portion is arranged outside the thin-walled stainless steel barrel and fixedly connected to the first parallel air clamp.

[0016] Furthermore, the upper clamping jaw mechanism includes an upper clamping jaw, a second parallel air clamping jaw, a second main shaft, a third gear, a fourth gear, a second servo motor, and a first servo drive module. The upper clamping jaw is drive-connected to the second parallel air clamping jaw, the second parallel air clamping jaw is fixedly connected to the bottom of the second main shaft, the third gear is coaxially arranged on the outside of the second main shaft, the fourth gear is drive-connected to the drive shaft of the second servo motor, the third gear and the fourth gear are meshed with each other, an upper chuck shell is arranged on the outside of the second main shaft, a second bearing is arranged between the upper chuck shell and the second main shaft, a second limit flange is arranged on the outside of the second bearing, a second motor housing is connected to the upper chuck shell, the second servo motor is connected to the second motor housing, the fourth gear is arranged in the second motor housing, and the first servo drive module is drive-connected to the upper chuck shell.

[0017] Furthermore, a heat shield is provided below the upper clamping jaw, the heat shield is connected to the upper clamping head housing via a connecting plate, and a cooling water pipe is provided inside the heat shield.

[0018] Furthermore, the fire head assembly includes a fire head, a fire head bracket, an air intake pipe, and a second servo drive module. The fire head is connected to the second servo drive module through the fire head bracket, and the air intake pipe connects the fire head and an external gas source.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention adopts a vertical placement of the arc tube and a self-rotation method of the arc tube. During the shrinking process of the arc tube, when the quartz glass shrinks, it will automatically be concentric around the axis, ensuring that the central axis of the electrode after shrinking is concentric with the central axis of the arc tube, and also ensuring that the axes of the electrodes at both ends of the arc tube are concentric.

[0021] 2. In the process of shrinking and sealing, the present invention uses chilled water to cool the arc tube bulb to avoid the high temperature of the shrinking and sealing fire head affecting the stability of the air pressure in the arc tube bulb and the evaporation of liquid mercury.

[0022] 3. The surface of the chilled water in the present invention wraps around the outside of the arc tube bulb, and the silicon powder generated by the burner burning the fused quartz glass falls on the surface of the chilled water, preventing the silicon powder from adhering to the outer surface of the bulb and affecting the light output.

[0023] 4. The water tank of the present invention is divided into three layers, inner and outer. The inner water tank is fixed to ensure the stability of the liquid level; the middle water tank and the lower chuck rotate synchronously, and the contaminated water containing silicon powder on the top surface of the water tank is thrown out by centrifugal force. The contaminated water enters the outer water tank and is discharged from the overflow port.

[0024] 5. In the process of shrinking and sealing, the present invention always replenishes water to the inner water tank and discharges the polluted water through the overflow port of the outer water tank. When replacing the next arc tube shrink seal, there is no need to empty the chilled water in the water tank, and the water can continue to be used, thus saving water. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the processing technology of the quartz glass arc tube in the embodiment of the present invention;

[0026] Figure 2 Schematic diagram of a shrinking and sealing process method for the second end of a quartz glass arc tube in an embodiment of the present invention;

[0027] Figure 3 1 is a front view of a second end shrink seal device of a quartz glass arc tube according to an embodiment of the present invention;

[0028] Figure 4 1 is a left view of the second end shrink seal device of the quartz glass arc tube in an embodiment of the present invention;

[0029] Figure 5 BB direction view of the shrink seal device at the second end of the quartz glass arc tube in the embodiment of the present invention;

[0030] Figure 6 2. It is a CC-direction view of the shrink seal device at the second end of the quartz glass arc tube in an embodiment of the present invention;

[0031] Figure 7 1 is a structural diagram of a water tank assembly of a shrink seal device for a second end of a quartz glass arc tube according to an embodiment of the present invention;

[0032] Wherein: 101-first servo motor, 102-second gear, 103-first motor housing, 104-lower chuck housing, 105-fire head, 106-fire head bracket, 107-intake pipe, 108-second servo drive module, 109-heat shield, 110-connecting plate, 111-second parallel air claw, 112-upper chuck housing, 113-second motor housing, 114-second servo motor, 115-first servo drive module, 116-quartz glass arc tube, 117-first support rod, 118-second spindle, 119-second bearing, 120-second limit flange, 121-third gear Wheel, 201-first main shaft, 202-first limiting flange, 204-flat key, 205-first gear, 206-first bearing, 207-support plate, 208-first parallel air claw, 209-upper clamp, 210-cooling water pipe, 211-water supply pipe, 212-inner water tank, 213-outer water tank, 214-middle water tank, 215-front clamp part, 216-rear clamp part, 217-thin-walled stainless steel cylinder, 218-overflow port, 219-second support rod, 220-flange, 501-middle water tank chilled water, 502-inner water tank chilled water, 503-annular gap, 504-outer water tank chilled water. DETAILED DESCRIPTION

[0033] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0034] The steps of the processing embodiment of a quartz glass arc tube of the present invention are as follows: Figure 1 shown.

[0035] T1: After the first end electrode is installed and positioned in the bulb shell of the quartz glass arc tube, the first end is sealed; then pills, liquid mercury, etc. are installed, and the second end electrode is installed and positioned; the quartz glass arc tube is placed on the exhaust device, the gas in the quartz glass arc tube is replaced, a certain pressure of working gas is filled in, and the second end is sealed.

[0036] T2: Transfer the pills, liquid mercury, etc. to the second end of the quartz glass arc tube, shrink and seal the molybdenum foil and quartz glass of the first end electrode of the quartz glass arc tube to achieve vacuum sealing.

[0037] T3: Transfer pills, liquid mercury, etc. into the bulb, shrink the molybdenum foil and quartz glass of the second end electrode of the quartz glass arc tube, protect the bulb during shrinking to prevent the high temperature of the fire head from affecting the pills, liquid mercury, air pressure, etc. in the bulb, and achieve vacuum sealing after shrinking.

[0038] T4: Use machining method to remove the tail pipes at both ends.

[0039] T5: Use machining method to remove the tail wires at both ends.

[0040] The steps of an embodiment of a method for shrinking and sealing the second end electrode of a quartz glass arc tube according to the present invention are as follows: Figure 2 shown.

[0041] S1: Place the quartz glass arc tube with the first end electrode shrunk and sealed vertically in the water tank, and position the height of the bulb shell. The shrunk and sealed first end electrode is located at the bottom, and the pills, liquid mercury, etc. are located in the bulb shell. The lower clamp clamps the tail end of the first end of the quartz glass arc tube.

[0042] S2: The upper clamp moves downward under the control of the second servo drive module, and the upper clamp enters the clamping position of the second end of the quartz glass arc tube and clamps the tail of the second end of the quartz glass arc tube.

[0043] S3: The quartz glass arc tube rotates while being clamped by the upper and lower clamps; chilled water is injected into the water tank and continuously replenished so that the surface of the chilled water overflows from the top of the water tank to take away the silicon powder generated during shrinking; the shrinking flame melts the quartz glass at high temperature, and the quartz glass shrinks and fits onto the electrode molybdenum foil inside the quartz glass. The flame moves up and the upper clamp pulls up at the same time to shrink and seal the quartz glass and the electrode molybdenum foil section by section, so that the quartz glass arc tube achieves a reliable vacuum seal.

[0044] like Figure 3-7 As shown, a quartz glass arc tube second end shrinkage sealing device using the above method embodiment is composed of a lower clamping jaw mechanism, an upper clamping jaw mechanism, a fire head assembly, a water tank assembly, etc.

[0045] Lower clamp mechanism Figure 3 , 4 As shown, the rear clamping jaw portion 216 of the lower clamping jaw mechanism is installed on the first parallel air jaw 208, and the first parallel air jaw 208 is installed on the first main shaft 201. Two first bearings 206 are connected between the outer side of the first main shaft 201 and the inner side of the lower chuck shell 104, and the first limiting flanges 202 are arranged at the upper and lower ends of the first bearing 206.

[0046] A first gear 205 is coaxially disposed on the outer side of the first main shaft 201 . The first gear 205 is connected to the first main shaft 201 via a flat key 204 . The first gear 205 rotates synchronously with the first main shaft 201 .

[0047] The first gear 205 is meshed with the second gear 102, the second gear 102 is mounted on the output shaft of the first servo motor 101, the first servo motor 101 is mounted on the first motor housing 103, the first motor housing 103 is mounted on the lower chuck housing 104, the second gear is arranged in the first motor housing 103, and the first servo motor 101 can drive the first main shaft 201 to rotate through the transmission of the second gear 102 and the first gear 205.

[0048] Similar to the lower clamping mechanism, the upper clamping jaw 209 of the upper clamping jaw mechanism is mounted on the second parallel air gripper 111, and the second parallel air gripper 111 is mounted on the second main shaft 118. Two second bearings 119 are connected between the outer side of the second main shaft 118 and the inner side of the upper chuck housing 112, and second limit flanges 120 are arranged at the upper and lower ends of the second bearing 119. A third gear 121 is coaxially arranged on the outer side of the second main shaft 118, and the third gear 121 rotates synchronously with the second main shaft 118. A second motor housing 113 is mounted on the upper chuck housing 112, and a second servo motor 114 is mounted on the second motor housing 113. The second servo motor 114 drives and connects to the fourth gear, and drives the second parallel air gripper 111 to rotate through the meshing transmission of the third gear 121 and the fourth gear.

[0049] The second servo motor 114 and the first servo motor 101 are controlled by an electrical control system to achieve synchronous rotation.

[0050] The second servo motor 114 and the first servo motor 101 control the second parallel air gripper 111 and the first parallel air gripper 208 to rotate synchronously, the upper clamping jaw 209 on the second parallel air gripper 111 clamps the second end tail of the upper end of the quartz glass arc tube 116, and the rear clamping jaw portion 216 and the front clamping jaw portion 215 on the first parallel air gripper 208 clamp the first end tail of the lower end of the quartz glass arc tube 116, so as to realize the synchronous rotation of the upper and lower end tails of the clamped quartz glass arc tube 116.

[0051] The upper clamp 209 is mounted on the second parallel air gripper 111, and the second parallel air gripper 111 is mounted on the upper chuck housing 112, and the upper chuck housing 112 is mounted on the first servo drive module 115. The first servo drive module 115 controls the upper clamp 209 to move upward, and the upper clamp 209 clamps the second end of the quartz glass arc tube 116 and stretches it upward to ensure the straightness of the quartz glass arc tube 116 after shrinking.

[0052] The rear clamping jaw portion 216 is located on the outside of the middle water tank 214, while the front clamping jaw portion 215 is located on the inside of the middle water tank 214. The rear clamping jaw portion 216 and the front clamping jaw portion 215 are connected by screws. The portion of the middle water tank 214 where the front clamping jaw portion 215 and the rear clamping jaw portion 216 contact is a thin-walled stainless steel cylinder 217, which can be deformed with the opening and closing of the lower clamping jaw, and does not affect the normal opening and closing of the lower clamping jaw to clamp the quartz glass arc tube 116.

[0053] Three support plates 207 are provided at the bottom of the middle water tank 214. Figure 4 , 6As shown, the support plate 207 is mounted on the first parallel air claw 208 and fixed with screws, and the middle water tank 214 rotates synchronously with the first parallel air claw 208. A positioning block is provided in the center of the middle water tank 214, and the center of the positioning block is concentric with the rotation center of the first parallel air claw 208. The positioning block can locate the height position of the quartz glass arc tube 116 and control the height position of the second end electrode of the quartz glass arc tube 116 to be the same when the shrink seal is performed. A flange 220 is provided at the top edge of the middle water tank 214, and the chilled water overflows from the flange 220 of the middle water tank 214, flows into the outer water tank 213, and is discharged from the overflow port 218 at the bottom of the outer water tank 213.

[0054] The outer water tank 213 is mounted on the first support rod 117 and fixed with screws, and the first support rod 117 is fixed to the outer side of the lower chuck housing 104 with screws; the inner water tank 212 is fixed to the outer water tank 213 with a second support rod 219, and there are two second support rods 219, and a water supply pipe 211 is welded at the center of one of the second support rods 219, and the chilled water is supplied to the water tank through the water supply pipe 211. The top edge of the middle water tank 214 is provided with a flange 220, and the outer edge of the flange 220 extends into the outer water tank 213, the top of the outer water tank 213 is higher than the top of the middle water tank 214, and the top of the inner water tank 212 is flush with the top of the middle water tank 214.

[0055] The fire head 105 is mounted on the fire head bracket 106 with screws, and the fire head bracket 106 is mounted on the second servo drive module 108. The second servo drive module 108 can control the fire head 105 to move up and down, and the fuel gas used by the fire head 105 is introduced through the air intake pipe 107. The flame generated by the fire head 105 is used to melt the second end of the quartz glass arc tube 116, and evenly shrink the quartz glass 116 of the quartz glass arc tube.

[0056] The high temperature of the fire head 105 will affect the normal operation of the upper clamping jaw 209. A heat shield 109 is installed under the upper clamping jaw 209, and the heat shield 109 is connected to the connecting plate 110 with screws. The connecting plate 110 is fixed to the upper clamping head shell 112 with screws and moves synchronously with the upper clamping head shell 112; a cooling water pipe 210 for cooling water is provided on the heat shield 109, and the cooling water cools the heat shield 109 through the cooling water pipe 210.

[0057] The water tank assembly that protects the quartz glass arc tube is as follows Figure 7As shown, the chilled water enters the middle water tank 214 through the water supply pipe 211, and the chilled water enters the inner water tank 212 through the annular gap 503 at the bottom of the inner water tank 212. The liquid level of the inner water tank chilled water 502 is stable, and the bulb of the quartz glass arc tube 116 is protected; the silicon powder generated when the fire head 105 melts the quartz glass falls on the liquid level of the inner water tank chilled water 502, and the silicon powder overflows into the middle water tank chilled water 501 with the liquid level of the inner water tank chilled water 502. The middle water tank 214 rotates, and the silicon powder on the liquid level of the middle water tank chilled water 501 flows into the outer water tank chilled water 504 in the outer water tank 213 through the flange 220 under the centrifugal action of the rotation of the middle water tank 214, and is finally discharged from the overflow port 218.

[0058] The inner water tank chilled water 502 and the middle water tank chilled water 501 do not need to be drained when the quartz glass arc tube 116 is replaced, and can continue to be used, thus saving water.

[0059] The above specific implementation methods are only for illustrating the technical concept and structural features of the present invention, and the purpose is to enable relevant persons familiar with this technology to implement it. However, the above content does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should fall within the protection scope of the present invention.

Claims

1. A method for shrinking and sealing the second end of a quartz glass arc tube, characterized in that: The quartz glass arc tube is placed vertically, and the arc tube is driven to rotate along the axial direction as the rotation axis, and the burner is controlled to melt the second end of the quartz glass arc tube, and the glass shrinks and fits to the electrode molybdenum foil in the glass to form a vacuum seal; in the shrinking process of melting the quartz glass section by section, the shrinking seal of the arc tube is stretched at the same time to ensure the straightness of the shrinking seal of the arc tube; during the shrinking, the arc tube bulb is immersed in chilled water to prevent the high temperature of the burner from affecting the quality of the arc tube after shrinking; the steps include: Step 1: Place the quartz glass arc tube with the first end electrode shrunk and sealed vertically in the water tank, and position the height of the bulb shell. The shrunk and sealed first end electrode is located at the bottom, and the pills, liquid mercury, etc. are located in the bulb shell. The lower clamp clamps the tail end of the first end of the quartz glass arc tube; Step 2: The upper clamp moves downward, and the upper clamp enters the clamping position of the second end of the quartz glass arc tube, and clamps the second end of the quartz glass arc tube; Step 3: The quartz glass arc tube rotates under the clamping of the upper and lower clamps; chilled water is injected into the water tank and continuously replenished to make the chilled water overflow from the top of the water tank to take away the silicon powder generated during shrinking; the shrinking flame melts the quartz glass at high temperature, and the quartz glass shrinks and fits to the electrode molybdenum foil inside the quartz glass. The flame moves up and the upper clamp pulls up at the same time to shrink the quartz glass and the electrode molybdenum foil section by section, so that the quartz glass arc tube can achieve reliable vacuum sealing.

2. A quartz glass arc tube second end shrink seal device, characterized in that: The method for shrinking and sealing the second end of a quartz glass arc tube as claimed in claim 1 comprises a lower clamping jaw mechanism, an upper clamping jaw mechanism, a fire head assembly, and a water tank assembly, wherein the upper clamping jaw mechanism and the lower clamping jaw mechanism are respectively arranged at the upper and lower ends of the quartz glass arc tube (116), and can clamp and drive the upper and lower ends of the quartz glass arc tube (116) to rotate synchronously, the fire head assembly is arranged on the side of the quartz glass arc tube (116), and can generate high temperature to melt and shrink the second end of the quartz glass arc tube (116), and the water tank assembly is arranged above the lower clamping jaw mechanism, and can cool the quartz glass arc tube (116) during the shrinking process.

3. A quartz glass arc tube second end shrink seal device according to claim 2, characterized in that: The lower clamping jaw mechanism comprises a lower clamping jaw, a first parallel air jaw (208), a first main shaft (201), a first gear (205), a second gear (102), and a first servo motor (101); the lower clamping jaw is drivingly connected to the first parallel air jaw (208); the first parallel air jaw (208) is fixedly connected to the top of the first main shaft (201); the first gear (205) is coaxially arranged on the outside of the first main shaft (201); the second gear (102) is drivingly connected to the driving shaft of the first servo motor (101); the first gear (205) is ) and the second gear (102) are meshedly connected with each other, a lower chuck shell (104) is arranged on the outer side of the first main shaft (201), a first bearing (206) is arranged between the lower chuck shell (104) and the first main shaft (201), a first limiting flange (202) is arranged on the outer side of the first bearing (206), a first motor housing (103) is connected to the lower chuck shell (104), the first servo motor (101) is connected to the first motor housing (103), and the second gear (102) is arranged in the first motor housing (103).

4. A quartz glass arc tube second end shrink seal device according to claim 3, characterized in that: The water tank assembly comprises an inner water tank (212), a middle water tank (214), and an outer water tank (213); the bottom of the middle water tank (214) is fixedly connected to the first parallel air gripper (208) via a support plate (207); the outer water tank (213) is arranged on the outside of the middle water tank (214); the outer water tank (213) is fixedly connected to the lower chuck shell (104) via a first support rod (117); a flange (220) is arranged on the top edge of the middle water tank (214); the outer edge of the flange (220) extends to In the outer water tank (213), the top of the outer water tank (213) is higher than the top of the middle water tank (214); the inner water tank (212) is arranged in the middle water tank (214), and the top of the inner water tank (212) is flush with the top of the middle water tank (214); the inner water tank (212) is fixedly connected to the outer water tank (213) via a second support rod (219); an annular gap (503) is arranged at the bottom of the inner water tank (212); and the inner water tank (212) and the middle water tank (214) are connected via the annular gap (503).

5. A quartz glass arc tube second end shrink seal device according to claim 4, characterized in that: The water tank assembly further comprises a water supply pipe (211), wherein the water supply pipe (211) is arranged inside the second support rod (219) and connected to the middle water tank (214), and an overflow port (218) is arranged at the bottom of the outer water tank (213).

6. A quartz glass arc tube second end shrink seal device according to claim 5, characterized in that: The lower clamping jaw comprises a front clamping jaw portion (215) and a rear clamping jaw portion (216) which are fixedly connected to each other; the bottom center of the middle water tank (214) is a thin-walled stainless steel barrel (217); the front clamping jaw portion (215) is arranged inside the thin-walled stainless steel barrel (217); the rear clamping jaw portion (216) is arranged outside the thin-walled stainless steel barrel (217) and is fixedly connected to the first parallel air jaw (208).

7. A quartz glass arc tube second end shrink seal device according to claim 2, characterized in that: The upper clamping jaw mechanism comprises an upper clamping jaw (209), a second parallel air jaw (111), a second main shaft (118), a third gear (121), a fourth gear, a second servo motor (114), and a first servo drive module (115); the upper clamping jaw (209) is drivingly connected to the second parallel air jaw (111); the second parallel air jaw (111) is fixedly connected to the bottom of the second main shaft (118); the third gear (121) is coaxially arranged on the outside of the second main shaft (118); the fourth gear is drivingly connected to the drive shaft of the second servo motor (114); the third gear (121) and the fourth gear are connected to the drive shaft of the second servo motor (114); The gears are meshed and connected with each other, an upper chuck shell (112) is arranged on the outer side of the second main shaft (118), a second bearing (119) is arranged between the upper chuck shell (112) and the second main shaft (118), a second limit flange (120) is arranged on the outer side of the second bearing (119), a second motor housing (113) is connected to the upper chuck shell (112), the second servo motor (114) is connected to the second motor housing (113), the fourth gear is arranged in the second motor housing (113), and the first servo drive module (115) is drivingly connected to the upper chuck shell (112).

8. A quartz glass arc tube second end shrink seal device according to claim 7, characterized in that: A heat shield (109) is provided below the upper clamping jaw (209), the heat shield (109) is connected to the upper clamping head housing (112) via a connecting plate (110), and a cooling water pipe (210) is provided inside the heat shield (109).

9. A quartz glass arc tube second end shrink seal device according to claim 2, characterized in that: The fire head assembly comprises a fire head (105), a fire head bracket (106), an air intake pipe (107), and a second servo drive module (108); the fire head (105) is driven and connected to the second servo drive module (108) through the fire head bracket (106); and the air intake pipe (107) connects the fire head (105) and an external gas source.

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