阅读说明：本技术 一种用于石英玻璃管状器件封接的旋转火头装置及其方法 (Rotary fire head device for sealing quartz glass tubular device and method thereof ) 是由 何荣开 夏开拓 刘鹏 于 2020-04-21 设计创作，主要内容包括：本发明公开一种用于石英玻璃管状器件封接的旋转火头装置及其方法。旋转火头装置包括安装座、旋转驱动装置、火头体、旋转火头芯、进气结构,旋转驱动装置能够输出旋转驱动力；火头体固定在安装座上并沿轴线设置圆柱形内腔；火头芯同轴置于火头体的圆柱形内腔中并能够在圆柱形内腔中绕自身轴线旋转；火头芯的一端与旋转驱动装置的动力输出端连接,另一端则安装进气结构的火嘴。由此可知,本发明采用旋转火头芯上的旋转火焰对石英玻璃管状器件进行封接,火焰由火嘴喷出,火力集中,火焰温度对周边设施影响较小,容易控制石英玻璃封接处的外形尺寸和轮廓形状。(The invention discloses a rotary fire head device for sealing a quartz glass tubular device and a method thereof. The rotary fire head device comprises a mounting seat, a rotary driving device, a fire head body, a rotary fire head core and an air inlet structure, wherein the rotary driving device can output rotary driving force; the fire head body is fixed on the mounting seat and is provided with a cylindrical inner cavity along the axis; the fire head core is coaxially arranged in the cylindrical inner cavity of the fire head body and can rotate around the axis of the fire head core in the cylindrical inner cavity; one end of the fire head core is connected with the power output end of the rotary driving device, and the other end of the fire head core is provided with a fire nozzle of the air inlet structure. Therefore, the invention seals the quartz glass tubular device by adopting the rotating flame on the rotating fire head core, the flame is sprayed out from the fire nozzle, the fire power is concentrated, the influence of the flame temperature on peripheral facilities is small, and the overall dimension and the outline shape of the quartz glass sealing part are easy to control.)

1. A rotary fire head device for a quartz glass tubular device is characterized by comprising a mounting seat, a rotary driving device, a fire head body, a rotary fire head core and an air inlet structure, wherein the air inlet structure comprises a gas inlet pipe, a fire nozzle and a gas transmission channel; wherein:

the rotary driving device is fixed on the mounting seat and can output rotary driving force;

the fire head body is fixed on the mounting seat and is provided with a cylindrical inner cavity along the axis;

the fire head core is provided with a through hole along the central axis, is coaxially arranged in the cylindrical inner cavity of the fire head body and can rotate around the axis of the fire head core in the cylindrical inner cavity; one end of the fire head core is connected with the power output end of the rotary driving device, and the other end of the fire head core is provided with a fire nozzle;

one end of the gas transmission channel is communicated with a gas inlet pipe fixed on the outer wall of the burner body, and the other end of the gas transmission channel is communicated with the burner.

2. The rotary fire head device according to claim 1, wherein the gas delivery passage comprises an annular gas inlet chamber disposed on the outer wall of the fire head body, an annular sealing chamber disposed between the outer wall of the fire head core and the outer wall of the fire head body, a gas inlet connecting passage a disposed on the fire head body and communicating the annular gas inlet chamber and the annular sealing chamber, and a gas inlet connecting passage b disposed on the fire head core and communicating the annular sealing chamber and the fire nozzle.

3. The rotary fire head device according to claim 2, wherein the fire head core is fixedly provided with a gas blocking piece at a gas inlet position of the gas inlet connecting passage b communicating with the annular sealing chamber.

4. The rotary fire head device according to claim 2 or 3, wherein the annular gas inlet chamber comprises an annular gas inlet groove arranged on the outer wall of the fire head body and an annular member sealing the notch of the annular gas inlet groove; the gas inlet pipe is fixed on the circular ring piece and is communicated with the annular gas inlet groove.

5. The rotary fire head device according to claim 4, wherein the outer wall of the fire head core is hermetically connected with the inner wall of the fire head body through two star-shaped sealing rings;

the two star-shaped sealing rings, the outer wall of the fire head core and the inner wall of the fire head body are connected in an enclosing manner to form the annular sealing cavity.

6. The rotary fire head device according to claim 4, wherein the rotary driving device comprises a motor, a gear transmission pair and a rotary stop-and-go assembly; wherein:

the base of the motor is fixed on the mounting base;

the gear transmission pair comprises a driving gear and a driven gear which are meshed; the driving gear is coaxially connected with an output shaft of the motor, and the driven gear is coaxially arranged with the fire head core and fixed with the end part of the fire head core;

the rotation stop-motion component comprises magnetic steel and a Hall switch which are matched with each other; the magnetic steel is installed on the driving gear, and the Hall switch is installed on the installation seat.

7. The rotary fire head device according to claim 6, wherein the wall of the cylindrical inner cavity is provided with two bearings, and the outer wall of the fire head core is rotatably connected with the wall of the cylindrical inner cavity through the two bearings;

the inner ring of one of the two bearings is axially fixed through a driving gear fixed at one end of the fire head core, and the inner ring of the other bearing is axially fixed through a cover plate assembled at the other end of the fire head core.

8. The rotary fire head device according to claim 7, wherein the fire head body is provided with a water cooling structure for protecting the star-shaped sealing ring by water cooling at a position corresponding to the sealing chamber; the water cooling structure comprises a water inlet pipe, a water outlet pipe and an annular cooling water tank;

the annular cooling water tank is arranged on the outer wall of the fire head body, and the notch of the annular cooling water tank is sealed by the water retaining ring;

the water inlet pipe and the water outlet pipe are both arranged on the water retaining ring and are respectively communicated with the annular cooling water tank.

9. The rotary fire head apparatus according to claim 8, wherein there are at least two fire nozzles.

10. A method of sealing a quartz glass tubular article by fusion using the rotary torch apparatus of claim 1, comprising the steps of:

(1) clamping the upper end of the quartz glass tubular device by an upper clamping head extending out of a fire head core through hole of the rotary fire head device, clamping the lower end of the quartz glass tubular device by a lower clamping head arranged in the water tank, and ensuring that a bulb shell of the quartz glass tubular device is basically positioned below the cooling water level of the water tank;

(2) keeping the tube of the quartz glass tubular device in a vacuum state;

(3) starting a motor to drive a fire head core of the rotary fire head device to rotate, so that flame sprayed out of a fire nozzle rotates along the axis of the quartz glass tubular device to melt the quartz glass tubular device; and simultaneously, gradually moving the rotary fire head device upwards along the axis of the quartz glass tubular device until the upper end of the quartz glass tubular device is gradually fused and sealed.

Technical Field

The invention relates to the field of processing of quartz glass tubular devices, in particular to a rotary fire head device and a method for sealing an arc tube of a high-pressure gas discharge lamp and an arc tube of a special light source.

Background

The sealing processing of quartz glass tubular devices, such as metal halide lamp arc tubes, mercury lamp arc tubes, automobile xenon headlight arc tubes, and the like, adopts paired or annular fire heads to heat the quartz glass to be sealed, and then uses a mold to press and form the part to be sealed.

For the sealing of molybdenum foil and quartz glass of an electrode in an electric arc tube of an ultra-high voltage mercury lamp, the sealing of the quartz glass of the electric arc tube end of an electrodeless metal halide lamp, the pressure when the electric arc tube is lighted is high, and the quartz glass pressing and sealing method can not ensure the pressure resistance of the electric arc tube, can not easily generate tube explosion and can not ensure the product quality; if mould pressing is not adopted, quartz glass sealing is processed by using a pair of fire heads and an annular fire head, negative pressure is adopted in the lamp tube, the appearance size of the sealing part is difficult to ensure, the shape is not good, and the glass is easy to crystallize; meanwhile, the flame of the paired fire heads and the flame of the annular fire head have large influence on the temperature of peripheral facilities, and the liquid mercury and pills in the bulb shell are difficult to protect.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a rotatable fire head device for sealing the tube end of a quartz glass tubular device. The quartz glass sealing and the like of the arc tubes of the ultra-high pressure mercury lamp and the electrodeless metal halide lamp are processed by adopting a rotary fire head device, negative pressure is pumped in the lamp tube in advance, the width of flame sprayed by a fire nozzle is narrow, the quartz glass is moved section by section to be sealed, meanwhile, the sealed part is subjected to micro-stretching, the shape and the size of the sealed part are good after forming, the liquid mercury and pills in the bulb shell are protected from being evaporated by the temperature of the flame, and the quality of the produced product is good.

Drawings

FIG. 1 is a diagram illustrating an application example of a rotary fire head according to the present invention;

FIG. 2 is a front view of the rotary fire head of the present invention;

list of reference numerals in fig. 2: 101-electrodeless metal halide lamp arc tube, 102-burner, 103-sealing ring, 104-cover plate, 105-baffle, 106-burner body, 107-star-shaped sealing ring, 108-bearing, 109-driven gear, 110-screw a, 111-rotary burner core, 112-screw b, 113-air baffle sheet, 114-driving gear, 115-screw c, 116-motor, 117-screw d, 118-magnetic steel, 119-Hall switch and 120-mounting seat;

FIG. 3 is a top view of the rotary fire head configuration A of the present invention;

list of reference numerals in fig. 3: 201-pressure plate, 202-screw e;

FIG. 4 is a cross-sectional view of the rotary fire head configuration B-B of the present invention;

list of reference numerals in fig. 4: 301-gas inlet pipe, 302-ring, 303-gas block;

FIG. 5 is a C-C view of the rotary fire head configuration of the present invention;

list of reference numerals in fig. 5: 401-water outlet pipe, 402-water inlet pipe, 403-water baffle, 404-water baffle ring, 405-screw f, 406-screw g.

Detailed Description

The following description of the embodiments of the invention refers to the accompanying drawings, in which:

the invention relates to a rotary fire head device, which is characterized in that flame is added outside a quartz glass tubular device to be sealed, the quartz glass material is heated and fused section by section, and the sealing is contracted under the action of the pressure difference between the inside and the outside of the tubular device. An example of the application is shown in fig. 1: electrodes, pills and liquid mercury are filled in an arc tube of an ultra-high pressure mercury lamp to be sealed in a shrinking mode, vacuum is formed in the arc tube, two ends of the arc tube are clamped between an upper chuck and a lower chuck respectively, the lower chuck is placed in a water tank, the liquid level of cooling water in the water tank just covers the bulb of the arc tube, the pills and the liquid mercury in the bulb are prevented from evaporating during sealing, a rotating fire head rotates along the axis of the arc tube, flames burn glass of the arc tube section by section, the burnt quartz glass (vacuum in the arc tube) shrinks towards the axis direction under the action of the pressure difference between the inside and the outside, and the quartz glass is tightly attached to molybdenum foils on the electrodes to achieve vacuum sealing. The rotary fire head rotates and heats while moving and burning the fused glass for sealing, and simultaneously the upper chuck correspondingly moves up and stretches the quartz glass in a small amount, thereby ensuring the overall dimension and the cylindricity of the sealing and forming part of the glass tube.

As shown in fig. 2-5, the rotary fire head device for quartz glass tubular devices according to the present invention comprises a mounting base, a rotary driving device, a fire head body, a rotary fire head core, and an air inlet structure, wherein the air inlet structure comprises a gas inlet pipe, a fire nozzle, and a gas transmission channel; wherein:

the rotary driving device comprises a motor, a gear transmission pair and a rotary stop-and-go assembly; wherein: the base of the motor is fixed on the mounting base; the gear transmission pair comprises a driving gear and a driven gear which are meshed; the driving gear is coaxially connected with an output shaft of the motor, and the driven gear is coaxially arranged with the fire head core and fixed with the end part of the fire head core; the rotation stop-motion component comprises magnetic steel and a Hall switch which are matched with each other; the magnetic steel is installed on the driving gear, and the Hall switch is installed on the installation seat. The start and stop of the motor are controlled by the PLC, and the position of the rotary nozzle is controlled.

The fire head body is fixed on the mounting seat through the pressing plate, and a cylindrical inner cavity is arranged along the axis; specifically, the fire head body is provided with a positioning boss, the mounting seat is provided with a positioning hole, the positioning boss is inserted into the positioning hole, and the pressing plate is used for pressing the stop step of the fire head body, so that the rotary fire head is convenient to disassemble and assemble.

The fire head core is provided with the through hole along the central axis, the chuck mechanism can pass through the through hole from the upper part to clamp the upper end of the quartz glass tubular device, and the chuck mechanism cannot influence the rotary combustion and the movement of the rotary fire head. The fire head core is coaxially arranged in the cylindrical inner cavity of the fire head body and can rotate around the axis of the fire head core in the cylindrical inner cavity; one end of the fire head core is connected with the power output end of the rotary driving device, and the other end of the fire head core is provided with a fire nozzle. The rotary flame on the rotary fire head core seals the quartz glass tubular device, the flame is sprayed out from the fire nozzle, the fire power is concentrated, the influence of the flame temperature on peripheral facilities is small, and the overall dimension and the outline shape of the quartz glass sealing part are easy to control. The burner is arranged on the rotary burner core, the flame core sprayed out by the burner is symmetrical along the rotary central axis of the rotary burner core, and the flame core faces the surface of the quartz glass tubular device to be processed, so that the heating efficiency is higher, and less silicon powder is separated out.

One end of the gas transmission channel is communicated with a gas inlet pipe fixed on the outer wall of the burner body, and the other end of the gas transmission channel is communicated with the burner. The fuel gas enters from the fuel gas inlet pipe and is introduced into the burner through the gas transmission channel. In the invention, the gas transmission channel comprises an annular gas inlet chamber arranged on the outer wall of the fire head body, an annular sealing chamber arranged between the outer wall of the fire head core and the outer wall of the fire head body, a gas inlet connecting channel a arranged on the fire head body and communicated with the annular gas inlet chamber and the annular sealing chamber, and a gas inlet connecting channel b arranged on the fire head core and communicated with the annular sealing chamber and the fire nozzle. Therefore, gas enters the annular gas inlet chamber through the gas inlet pipe, then enters the annular sealing cavity through the gas inlet connecting channel a, finally enters the burner through the gas inlet connecting channel b for combustion, flame is sprayed out from the outlet of the burner, and the motor drives the flame to rotate and combust through the driving gear, the driven gear, the burner core and the burner so as to seal the quartz glass tubular device.

The fire head core is fixedly provided with an air blocking sheet at the air inlet position of an air inlet connecting channel b communicated with the annular sealing chamber. The gas pressure and flow can be stabilized.

Specifically, the annular air inlet chamber comprises an annular air inlet groove arranged on the outer wall of the fire head body and an annular piece for sealing the notch of the annular air inlet groove; the gas inlet pipe is fixed on the circular ring piece and is communicated with the annular gas inlet groove. The outer wall of the fire head core is connected with the inner wall of the fire head body in an air-tight manner through two star-shaped sealing rings, and the two star-shaped sealing rings, the outer wall of the fire head core and the inner wall of the fire head body are connected in an enclosing manner to form the annular sealing cavity. The two star-shaped sealing rings ensure that gas cannot leak when the fire head core rotates.

Preferably, two bearings are arranged on the wall of the cylindrical inner cavity, and the outer wall of the fire head core is rotatably connected with the wall of the cylindrical inner cavity through the two bearings; the inner ring of one of the two bearings is axially fixed through a driving gear fixed at one end of the fire head core, and the inner ring of the other bearing is axially fixed through a cover plate assembled at the other end of the fire head core.

Preferably, the fire head body is provided with a water cooling structure for protecting the star-shaped sealing ring by water cooling at a position corresponding to the sealing cavity; the water cooling structure comprises a water inlet pipe, a water outlet pipe and an annular cooling water tank; the annular cooling water tank is arranged on the outer wall of the fire head body, and the notch of the annular cooling water tank is sealed by the water retaining ring; the water inlet pipe and the water outlet pipe are both arranged on the water retaining ring and are respectively communicated with the annular cooling water tank. Cooling water enters from the water inlet pipeline, passes through the annular cooling water tank on the fire head body and is discharged from the water outlet pipeline; the temperature of the fire head can be controlled to rise by cooling water, and the service life of the star-shaped sealing ring is prolonged.

Preferably, there are at least two nozzles. The gas outlet of the burner 102 is provided with a single hole or a single row of multiple holes, so that the flame is more concentrated.

According to the rotary fire head device, the invention provides a method for sealing a quartz glass tubular device by melting, which comprises the following steps:

(1) clamping the upper end of the quartz glass tubular device by an upper clamping head extending out of a fire head core through hole of the rotary fire head device, clamping the lower end of the quartz glass tubular device by a lower clamping head arranged in the water tank, and ensuring that a bulb shell of the quartz glass tubular device is basically positioned below the cooling water level of the water tank;

(2) keeping the tube of the quartz glass tubular device in a vacuum state;

(3) starting a motor to drive a fire head core of the rotary fire head device to rotate, so that flame sprayed out of a fire nozzle rotates along the axis of the quartz glass tubular device to melt the quartz glass tubular device; and simultaneously, gradually moving the rotary fire head device upwards along the axis of the quartz glass tubular device until the upper end of the quartz glass tubular device is gradually fused and sealed.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

A rotary fire head device for sealing the tube end of a quartz glass tubular device is structurally shown in figures 2 and 3 and comprises a mounting seat, a motor, a fire head core, a fire head body, an air inlet system, a water cooling system and the like.

The mounting base 120 is provided with two positioning holes, namely a left positioning hole and a right positioning hole.

The positioning hole on the left is inserted into the positioning boss at the front end of the motor 116 and is fixed by a screw 117; a driving gear 114 is mounted on a rotation shaft of the motor 116, the rotation shaft of the motor is inserted into a center hole of the driving gear 114, and a key on the rotation shaft is inserted into a key groove of the gear 114 and fixed by a screw 115. The driving gear 114 is provided with a ring groove, and the magnetic steel 118 is absorbed in the ring groove and is positioned; the Hall switch 119 is screwed into a screw hole of the mounting base 120 through threads and is locked through a nut, the rotating stop direction of a motor shaft is detected through the Hall switch 119, the position of the fire nozzle 102 is controlled to be stopped accurately, and feeding and discharging of a quartz glass device are facilitated.

The driving gear 114 is engaged with the driven gear 109, and a positioning boss on the gear 109 is inserted into an inner hole of the ball bearing 108 to perform centering and is fixed on the rotary fire head core 111 by a screw 110. The rotary fire head core 111 is provided with two ball bearings 108, the outer rings of the two ball bearings 108 are arranged on the fire head body 106, the inner ring of the lower ball bearing 108 is fixed by a cover plate 104, and the cover plate 104 is fixed on the rotary fire head core 111 by screws 405, as shown in fig. 5.

The positioning boss of the fire head body 106 is inserted into the positioning hole on the right side, the pressure plate 201 is pressed on the shaft shoulder of the fire head body 106, and the position of the central shaft distance between the motor 116 and the fire head body 106 after installation is ensured by fixing with the screw 202.

Two star-shaped sealing rings 107 are arranged in an inner hole groove of the fire head body 106, the outer sides of the star-shaped sealing rings 107 are abutted by a baffle 105, the baffle 105 is abutted by the outer ring of a ball bearing 108, and the inner sides of the star-shaped sealing rings 107 are abutted with a rotary fire head core 111; between the two star-shaped sealing rings 107, the rotary fire head core 111 is provided with a groove, the fire head body 106 is provided with an air inlet hole to form a sealed space, and gas enters the rotary fire head core 111 from the fire head body 106.

Two nozzles 102 are arranged at the lower end of the rotary fire head core 111, and a sealing ring 103 is arranged between the nozzles 102 and the rotary fire head core 111 and is fixed by a screw 406; the gas inlet pipe 301 is welded with a circular ring 302, the circular ring 302 is wrapped at the outer end of the gas inlet ring D1 of the fire head body 106 and is welded and sealed, the gas baffle block 303 is arranged at the left side of the gas inlet ring of the fire head body 106, so that the gas inlet ring is divided into two equal parts, the gas baffle sheet 113 is arranged on the gas inlet ring D3 of the rotary fire head core 111, and the gas baffle sheet is fixed on the rotary fire head core 111 by a screw 112; the gas enters from the gas inlet pipe 302, enters the bilateral symmetrical gas inlet holes D2 of the fire head body through the gas inlet ring D1, enters the gas inlet ring D3 of the rotary fire head core 111, enters the gas inlet holes D4 and D5 of the rotary fire head core 111 through the gaps of the gas blocking pieces 113 on the two sides, and then enters the gas outlet hole of the fire nozzle 102 for combustion, so that the gas pressure and the flow are more stable, and the flame cannot change due to the rotation of the fire head core 111.

The outer ring of the fire head body 106 is provided with a groove, as shown in fig. 5, a water retaining ring 404 is arranged outside the groove and clamped outside the water tank, and the fire head body is formed by welding; the water retaining ring 404 is inserted with the water inlet pipe 402 and the water outlet pipe 401, the water retaining plate 403 is arranged between the water inlet pipe 402 and the water outlet pipe 401, the cooling water enters the groove of the fire head body 106 from the water inlet pipe 402, flows in the direction of the arrow in fig. 5, and flows out from the water outlet pipe 401 to cool and protect the fire head body 106.

A positioning boss is arranged below the fire head body 106 and is inserted into a corresponding positioning hole of the mounting base 120 for positioning, as shown in fig. 1; a shaft shoulder is arranged below the fire head body 106, the pressure plate 201 is pressed on the shaft shoulder of the fire head body 106 and fixed by a screw 202, the meshing clearance between the driving gear 114 and the driven gear 109 is guaranteed, and meanwhile, the rotary fire head is convenient to disassemble and assemble.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment, but equivalent modifications or changes made by those skilled in the art according to the present disclosure should be included in the scope of the present invention as set forth in the appended claims.