CN106851864B - A kind of continuously adjustable concentration photo-thermal device of two-part - Google Patents

Abstract

The present invention relates to a kind of two-parts to be continuously adjusted concentration photo-thermal device, including first section adjusts component, light source assembly, concentrating component, level-one lens barrel, secondary segment and adjusts component, second level lens barrel and optical assembly out.One end that first section adjusts component is connect with one end of level-one lens barrel, and light source assembly setting is adjusted in component in first section, and is driven light source assembly to adjust in component in first section and be axially moved.Concentrating component is arranged in level-one lens barrel, second level lens barrel is vertically set on the side wall of level-one lens barrel, optical assembly is arranged in second level lens barrel out, and the light of concentrating component reflection enters second level lens barrel and is emitted from optical assembly out, secondary segment adjusts component and is arranged on second level lens barrel side wall, and drives out optical assembly elevating movement.The present invention separates light source assembly with heated object; light source can be preferably protected, the service life of light source is extended, component is adjusted by first section and secondary segment adjusts assembly synergistic cooperation and can be achieved to continuously adjust; energy of light source is concentrated by concentrating component, improves light source utilization rate.

Description

A Two-stage Continuously Adjustable Concentrating Photothermal Device

technical field

The invention relates to the field of concentrating light and heat, in particular to a two-stage continuously adjustable concentrating light and heat device.

Background technique

With the development of science and technology and the progress of modern material preparation technology, the requirements for heating temperature and heating rate are getting higher and higher. It is difficult for the traditional resistance heating furnace to meet the requirements of actual scientific research and manufacturing.

In the fields of fuel combustion, gasification, pyrolysis, etc., in order to establish an accurate prediction model, the heating rate of particles during the heating process must be as high as 10 ² to 10 ⁵ ℃/s, while the heating rate of traditional resistance heating devices generally does not exceed 50 °C/s, it is difficult to meet the temperature rise requirement, and it is extremely time-consuming and energy-consuming. In terms of material science, the preparation of new materials often requires extremely stringent temperature rise requirements. For example, the temperature rise rate in the preparation of foamed alloys must reach 100-200°C/s, and the rapid annealing rate often used in thin film preparation is often as high as 50-100°C. °C/s. The heating rate and temperature limit have become the bottlenecks for the further development of combustion and material science, while the high energy consumption and time cost are also restricting the industrial application of related technologies.

At present, the rapid heating furnaces on the market often use iodine tungsten lamps as the heat source, the limit temperature is about 1000°C, and the limit heating rate is 120°C/s (vacuum) and 100°C/s (protective gas). Although it meets the requirements of some production research to a certain extent, there are still some deficiencies: First, the limit temperature is limited by the heat transfer mode of the first-level direct light source, which is lower than the temperature limit of many traditional resistance furnaces, and still cannot Meet the needs of many practical applications; second, the light source and heat source are in the furnace body, which affects the service life and optical performance of the light source on the one hand, and increases the manufacturing cost of the light source and system on the other hand, making the equipment counterfeit expensive; The temperature adjustment and the control of the heating rate all depend on the adjustment of the input power of the light source, which greatly reduces the service life of the equipment; the fourth is that the optical adjustment mainly depends on the potentiometer to adjust the input power, so that the optical device cannot work at the rated power , which also reduces the service life of the light source and device stability to a certain extent.

Contents of the invention

The technical problem to be solved by the present invention is to provide a two-stage continuously adjustable concentrating photothermal device for the above-mentioned deficiencies in the prior art.

The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a two-stage continuously adjustable concentrating photothermal device, including an initial adjustment assembly, a light source assembly, a light collection assembly, a primary lens barrel, a secondary adjustment assembly, a secondary mirror barrel and light components.

One end of the first-stage adjustment assembly is connected to one end of the first-stage lens barrel, the light source assembly is arranged in the first-stage adjustment assembly, and the first-stage adjustment assembly can drive the light source assembly to rotate in the first-stage adjustment assembly. to the movement.

The condensing assembly is arranged in the primary lens barrel, the secondary lens barrel is vertically arranged on the side wall of the primary lens barrel, the light output assembly is arranged in the secondary lens barrel, and The light reflected by the condensing assembly enters the secondary lens barrel and emerges from the light output assembly. The secondary stage adjustment assembly is arranged on the side wall of the secondary lens barrel and can drive the light output assembly in the second stage. Describe the lifting movement in the secondary lens barrel.

The light emitted by the light source assembly enters the primary lens barrel from the primary stage adjustment assembly and reaches the light-condensing assembly, enters the secondary lens barrel after being reflected by the light-condensing assembly, and exits the light-exiting assembly. for heating.

The beneficial effects of the present invention are: the two-stage continuously adjustable concentrating photothermal device of the present invention separates the light source assembly from the heated object, replaces the current mainstream input power adjustment method, and cooperates with the initial stage adjustment assembly and the second stage adjustment assembly Cooperating with continuous adjustment when the light source is always in the rated power operating condition, the light source can be better protected, the life of the light source is prolonged, and the stability of the equipment is improved. The combination of transmission and reflection concentrating is adopted, and concentrators of different materials are selected according to the design requirements, which effectively reduces the cost.

On the basis of above-mentioned technical scheme, the present invention can also be improved as follows:

The initial adjustment assembly includes two screw rods, a front cover, a rear cover, a first motor and a gear mechanism, the two screw rods are arranged at intervals between the front cover and the rear cover, and the front The cover plate is connected to one end of the primary lens barrel, and the front cover plate is provided with a through hole for the light to pass through, the first motor is arranged on the rear cover plate through a motor clip, and the gear The mechanism is radially arranged between the two screw rods, and is threadedly connected with the two screw rods respectively, the output shaft of the first motor is coaxially arranged with the gear mechanism, and the output shaft of the first motor The output shaft is in transmission connection with the gear mechanism, and can drive the gear mechanism to drive the two screw rods to rotate in reverse. The light source assembly is arranged radially between the two screw rods. It is threadedly connected with the two screw rods, and can move along the axial direction of the screw rods as the screw rods rotate.

The beneficial effect of the above further solution is: the light source assembly can be adjusted more conveniently through the above-mentioned initial adjustment assembly, and the gear mechanism is driven by the first motor to rotate, thereby driving the screw to rotate, and the screw to rotate. The rotation will drive the light source assembly to move along the axial direction of the screw rod.

Further: the gear mechanism includes a driving gear and two driven gears, the driven gears are arranged radially on the screw rods one by one and are fixedly connected with the corresponding screw rods, and the driving gears are set Between the two screw rods, and respectively meshing with the two driven gears, the output shaft of the first motor is connected to the driving gear, and drives the driving gear to drive the two driven gears. The moving gear rotates, and then drives the two described screw mandrels to rotate in reverse.

The beneficial effect of the above further solution is: the above structure can make the first motor located between the two screw rods to drive the screw rods to rotate relatively smoothly, and the position of the first motor itself does not change. Change, low noise, reliable connection.

Further: it also includes a heat dissipation mechanism, the heat dissipation mechanism is arranged in the area between the two screw rods, and is located between the gear mechanism and the light source assembly.

The beneficial effect of the above further solution is: the heat dissipated by the light source assembly can be dissipated in time through the heat dissipation mechanism, so as to avoid the local temperature of the light source assembly being too high, and to play a better role in the light source assembly. Protective effect, prolong the service life of the light source components.

Further: the light source assembly includes a light source, a reflector, a support plate and two gear rods, the support plate is arranged radially between the two screw rods, and the two gear rods are arranged in a one-to-one correspondence on the screw rod, and the two gear rods are arranged opposite to each other, the reflector is inlaid on the support plate, the light source is arranged in the reflector, the gear rod is arranged on the screw rod and The edge of the support plate is fixedly connected.

The beneficial effect of the above further solution is: the light emitted by the light source can be preliminarily reflected and gathered through the reflector, the diffuse reflection of light can be reduced, and the utilization rate of light energy can be improved. By connecting the reflector to the light source, the On the support plate, the light source can be moved together with the reflector by driving the movement of the support plate, and the stop rod can limit the position of the support plate to prevent the light source from moving In the process of being too close to the Fresnel lens, the temperature of the Fresnel lens is too high, which can protect the Fresnel lens very well and prolong the service life of the Fresnel lens.

Further: the condensing assembly includes a Fresnel lens, a concave mirror and a reflective mirror, the Fresnel lens is arranged at the end of the primary lens barrel close to the primary adjustment assembly, and passes through the mirror with the front cover The concave mirror is fixedly connected with the clip, the concave mirror is sealed and arranged at the end of the primary lens barrel away from the first stage adjustment assembly, the reflective mirror is arranged between the Fresnel lens and the concave mirror through a support rod, and is located at the on the central axis of the concave mirror, so that the light reflected by the concave mirror can reach the reflective mirror, enter the secondary lens barrel after being reflected by the reflective mirror, and exit the light output assembly.

The beneficial effect of the above further solution is that the light rays initially gathered by the reflector can be dispersed by the Fresnel lens, then gathered by the concave mirror, and finally emitted after being reflected by the reflector, which can Converge the light to the exit component and refract it to form a more uniform spot.

Further: the light condensing assembly also includes a light leaker, the light leaker is arranged on the side of the Fresnel lens in the primary lens barrel away from the first stage adjustment assembly, and the narrow-diameter end of the light leaker is connected to the The primary lens barrel is connected to one end close to the primary adjustment assembly, and one end with a thick diameter is connected to the end of the screw rod close to the primary lens barrel.

The beneficial effect of the above further solution is: the excess light can be effectively absorbed by the light leaker, preventing it from entering the primary lens barrel, and at the same time, heat dissipation can be accelerated to ensure that the light source is at a normal working temperature.

Further: the secondary adjustment assembly includes a second motor, a helical gear and a screw, the second motor is arranged on the side wall of the secondary lens barrel, the screw is set in the secondary lens barrel and It is threadedly connected with the light emitting component, and the output shaft of the second motor is connected with the helical gear, and the helical gear passes through the side wall of the secondary lens barrel and is threadedly engaged with the screw, The second motor drives the helical gear to rotate, and the helical gear drives the screw to rotate, and then drives the light output assembly to move up and down along the screw axis.

The beneficial effect of the above further solution is that the height of the emitting assembly can be adjusted very conveniently through the secondary adjustment assembly, so that the spot size of the outgoing light can be adjusted to meet different heating requirements, which is simple, convenient, efficient and quick.

Further: the light output assembly includes a convex lens and a bracket, the bracket is arranged in the secondary lens barrel, and the bracket is screwed to the screw, and the second motor drives the screw through the helical gear Rotate, the rotation of the screw drives the lifting movement of the bracket, the convex lens is arranged on the bracket, and can move up and down together with the bracket.

The beneficial effect of the above further solution is: the convex lens can uniformly disperse the light emitted from the reflector, so that the emitted light forms a uniform light spot, and uniformly heats the object to be heated, which plays a better role. For the heating effect, the second motor can drive the support up and down so that the outgoing light can be adjusted more conveniently.

Further: Both the primary lens barrel and the secondary lens barrel are made of stainless steel inner silver-plated tubes.

The beneficial effect of the above further solution is: the absorption of light can be reduced as much as possible through the stainless steel inner silver-plated tube, and the utilization rate of light can be improved.

Description of drawings

Figure 1 is a schematic structural diagram of a two-stage continuously adjustable concentrating photothermal device of the present invention;

Fig. 2 is a schematic diagram of the optical path of a two-stage continuously adjustable concentrating photothermal device of the present invention.

In the accompanying drawings, the list of parts represented by each label is as follows:

1. Primary lens barrel, 2. Secondary lens barrel, 3. Screw rod, 4. Front cover, 5. Rear cover, 6. First motor, 7. Motor clamp, 8. Driving gear, 9. From Moving gear, 10, heat dissipation mechanism, 11, light source, 12, reflector, 13, support plate, 14, gear lever, 15, Fresnel lens, 16, concave mirror, 17, reflective mirror, 18, mirror clip, 19 , support rod, 20, light leaker, 21, second motor, 22, helical gear, 23, screw rod, 24, convex lens, 25, bracket.

Detailed ways

The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

As shown in Figure 1, a two-stage continuously adjustable concentrating photothermal device includes an initial stage adjustment component, a light source component, a light concentrating component, a primary lens barrel 1, a secondary stage adjustment component, a secondary lens barrel 2 and a light output components.

One end of the primary adjustment assembly is connected to one end of the primary lens barrel 1, the light source assembly is arranged in the initial adjustment assembly, and the initial adjustment assembly can drive the light source assembly in the initial adjustment assembly axial movement.

The condensing assembly is arranged in the primary lens barrel 1, the secondary lens barrel 2 is vertically arranged on the side wall of the primary lens barrel 1, and the light output assembly is arranged in the secondary lens barrel 2, and the light reflected by the condensing assembly enters the secondary lens barrel 2 and emerges from the light output assembly. The secondary adjustment assembly is arranged on the side wall of the secondary lens barrel 2 and can be driven The light output assembly moves up and down in the secondary lens barrel 2 .

As shown in Figure 2, the light emitted by the light source assembly enters the primary lens barrel 1 from the primary adjustment assembly and reaches the light-condensing assembly, and enters the secondary lens barrel 2 after being reflected by the light-condensing assembly The above-mentioned light-emitting component emits light to heat the external object.

The two-stage continuously adjustable concentrating photothermal device in the above embodiment separates the light source assembly from the heated object, replacing the current mainstream input power adjustment method, and the light source device is always in the Realize continuous adjustment under rated power operating conditions, which can better protect the light source, prolong the life of the light source, and improve the stability of the equipment. The energy of the light source is concentrated through the concentrating component, which improves the energy utilization rate of the light source. Concentrating light, according to the design requirements, different material concentrators are selected, which effectively reduces the cost.

In this embodiment, the first-stage adjustment assembly includes two screw rods 3, a front cover 4, a rear cover 5, a first motor 6 and a gear mechanism, and the two screw rods 3 are arranged at intervals on the front cover 4 and the rear cover 5, the front cover 4 is connected to one end of the primary lens barrel 1, and the front cover 4 is provided with a through hole for the light to pass through, and the first motor 6 is set on the rear cover 5 through the motor clip 7, the gear mechanism is arranged radially between the two screw rods 3, and is threadedly connected with the two screw rods 3 respectively, and the first The output shaft of the motor 6 is arranged coaxially with the gear mechanism, and the output shaft of the first motor 6 is connected to the gear mechanism, and the gear mechanism can be driven to drive the two screw rods 3 to rotate in reverse , the light source assembly is arranged radially between the two screw rods 3, the light source assembly is threadedly connected to the two screw rods 3 respectively, and can move along the screw rod 3 as the screw rod 3 rotates. The axial movement of the screw rod 3 is described. The light source assembly can be adjusted more conveniently through the above-mentioned initial adjustment assembly, and the first motor 6 drives the wheel mechanism to rotate, thereby driving the screw rod 3 to rotate, and the rotation of the screw rod 3 will drive the The light source assembly moves along the axial direction of the screw rod 3 .

Preferably, the gear mechanism includes a driving gear 8 and two driven gears 9, and the driven gears 9 are arranged radially on the screw rod 3 one by one and fixedly connected with the corresponding screw rod 3 , the driving gear 8 is arranged between the two screw mandrels 3, and meshes with the two driven gears 9 respectively, the output shaft of the first motor 6 is connected with the driving gear 8, and Driving the driving gear 8 drives the two driven gears 9 to rotate, and then drives the two screw mandrels 3 to rotate in reverse. Through the above structure, the first motor 6 located between the two screw mandrels 3 can drive the screw mandrel 3 to rotate relatively smoothly, and the position of the first motor 6 itself does not change, and the noise is small , the connection is reliable.

Preferably, the two-stage continuously adjustable concentrating photothermal device further includes a heat dissipation mechanism 10, the heat dissipation mechanism 10 is arranged in the area between the two screw rods 3, and is located between the gear mechanism and the Between the above light source components. Through the heat dissipation mechanism 10, the heat dissipated by the light source assembly in the working state can be dissipated in time, so as to avoid local overheating of the light source assembly, better protect the light source assembly, and prolong the The service life of the light source components.

Preferably, the heat dissipation mechanism 10 adopts a bladeless cooling fan, which can cool the light source assembly on the one hand, reduce noise and enhance user experience on the other hand. In practice, the heat dissipation mechanism 10 uses a Philips 36w ultra-quiet fan.

In this embodiment, the light source assembly includes a light source 11, a reflector 12, a support plate 13 and two gear rods 14, the support plate 13 is arranged radially between the two screw rods 3, and the two The gear rods 14 are arranged on the screw rods 3 in one-to-one correspondence, and the two gear rods 14 are arranged oppositely, the reflector 12 is inlaid on the support plate 13, and the light source 11 is arranged on the Inside the reflector 12 , the gear rod 14 is arranged on the threaded rod 3 and is fixedly connected with the edge of the support plate 13 . Through the reflector 12, the light emitted by the light source can be preliminarily reflected and gathered, the diffuse reflection of light can be reduced, and the utilization rate of light energy can be improved. Above, the light source can be moved together with the reflector 12 by driving the movement of the support plate 13, and the stop rod 14 can limit the position of the support plate 13 to prevent the light source 11 from moving In the process, it is too close to the Fresnel lens 15 and the temperature of the Fresnel lens is too high, which can protect the Fresnel lens 15 very well and prolong the service life of the Fresnel lens 15 .

Preferably, the light source 11 and the reflector 12 adopt an integrated halogen light source, the model of which is OSRAM MR16.

In this embodiment, the condensing assembly includes a Fresnel lens 15, a concave mirror 16 and a reflective mirror 17, the Fresnel lens 15 is arranged at one end of the primary lens barrel 1 close to the primary adjustment assembly, and It is fixedly connected with the front cover 4 through a mirror clip 18, and the concave mirror 16 is sealed and arranged in the primary lens barrel 1 at the end away from the primary adjustment assembly, and the reflective mirror 17 is arranged on the end of the primary lens barrel 1 through a support rod 19. between the Fresnel lens 15 and the concave mirror 16, and on the central axis of the concave mirror 16, so that the light reflected by the concave mirror 16 can reach the reflector 17 and pass through the reflector 17 After being reflected, it enters the secondary lens barrel 2 and exits from the light exit assembly. The light initially gathered by the reflector 12 can be dispersed by the Fresnel lens, then gathered by the concave mirror 16, and finally reflected by the reflector 17 and emitted, so that the light can be converged to the outgoing components and refract to form a more uniform spot.

In this embodiment, the Fresnel lens 15 is a F40 concentric quartz lens with a diameter of 76 mm, the concave mirror 16 is a silicon-coated F300 concave mirror with a diameter of 76 mm, and the reflector 17 is a 15 mm diameter silicon-coated concave mirror. Silicon mirror.

Preferably, the light concentrating assembly further includes a light leaker 20, the light leaker 20 is arranged on the side of the Fresnel lens 15 in the primary lens barrel 1 away from the primary adjustment assembly, and the light leaker One end of the thin diameter of 20 is connected with the end of the primary lens barrel 1 close to the primary adjustment assembly, and the end of the thick diameter is connected with the end of the screw rod 3 close to the primary lens barrel 1 . The excess light can be effectively absorbed by the light leaker 20 to prevent it from entering the primary lens barrel 1, and at the same time, heat dissipation can be accelerated to ensure that the light source is at a normal working temperature.

Preferably, the light leaker 20 is a thermally conductive carbon fiber grid structure connector.

In this embodiment, the secondary adjustment assembly includes a second motor 21, a helical gear 22 and a screw 23, the second motor 21 is arranged on the side wall of the secondary lens barrel 2, and the screw 23 is arranged In the secondary lens barrel 2 and screwed with the light output assembly, and the output shaft of the second motor 21 is in drive connection with the helical gear 22, and the helical gear 22 passes through the secondary The side wall of the lens barrel 2 is threadedly engaged with the screw 23, the second motor 21 drives the helical gear 22 to rotate, the helical gear 22 drives the screw 23 to rotate, and then drives the light output assembly along the The screw rod 23 moves axially up and down. The height of the exit assembly can be adjusted very conveniently through the sub-stage adjustment assembly, so that the spot size of the exit light can be adjusted to meet different heating requirements, which is simple, convenient, efficient and quick.

In this embodiment, the light output assembly includes a convex lens 24 and a bracket 25, the bracket 25 is arranged in the secondary lens barrel 2, and the bracket 25 is screwed to the screw rod 23, and the second motor 21 The helical gear 22 drives the screw 23 to rotate, and the screw 23 rotates to drive the bracket 25 to move up and down. The convex lens 24 is arranged on the bracket 25 and can move up and down together with the bracket 25 . The light emitted from the reflector 17 can be evenly dispersed by the convex lens 24, so that the emitted light forms a uniform light spot, and uniformly heats the object to be heated to achieve a better heating effect. The second motor 21 can drive the support 25 to rise and fall so that the outgoing light can be adjusted more conveniently.

Preferably, the convex lens 24 is 1.25 inches in diameter, and has three grades of YGA focusing lenses of K25, K16 and K6.

Preferably, both the primary lens barrel 1 and the secondary lens barrel 2 are stainless steel inner silver-plated tubes. Through the stainless steel inner silver-plated tube, the absorption of light can be reduced as much as possible, and the utilization rate of light can be improved.

In the present invention, both the first motor and the second motor are stepper motors whose model is Lichuan LC3610.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (10)

1. A two-stage continuously adjustable concentrating photothermal device is characterized in that: it includes an initial stage adjustment assembly, a light source assembly, a light concentrating assembly, a primary lens barrel (1), a secondary stage adjustment assembly, and a secondary lens barrel ( 2) and light emitting components; One end of the first-stage adjustment assembly is connected to one end of the primary lens barrel (1), the light source assembly is arranged in the first-stage adjustment assembly, and the initial-stage adjustment assembly can drive the light source assembly to adjust Axial movement within the assembly; The condensing assembly is arranged in the primary lens barrel (1), the secondary lens barrel (2) is vertically arranged on the side wall of the primary lens barrel (1), and the light output assembly is arranged in In the secondary lens barrel (2), the secondary stage adjustment component is arranged on the side wall of the secondary lens barrel (2), and can drive the light output component in the secondary lens barrel (2) lifting movement; The light emitted by the light source assembly enters the primary lens barrel (1) from the primary adjustment assembly and reaches the light-condensing assembly, and enters the secondary lens barrel (2) after being reflected by the light-condensing assembly and exits the light from the The component exits, heating the external object. 2. The two-stage continuously adjustable concentrating photothermal device according to claim 1, characterized in that: the initial adjustment assembly includes two screw rods (3), a front cover (4), a rear cover ( 5), the first motor (6) and the gear mechanism, the two screw rods (3) are arranged between the front cover (4) and the rear cover (5) at intervals, the front cover (4) ) is connected to one end of the primary lens barrel (1), and the front cover (4) is provided with a through hole for the light to pass through, and the first motor (6) is set by the motor clip (7) On the rear cover (5), the gear mechanism is arranged radially between the two screw rods (3), and is threadedly connected with the two screw rods (3) respectively, and the first The output shaft of the motor (6) is arranged coaxially with the gear mechanism, and the output shaft of the first motor (6) is connected to the gear mechanism, and the gear mechanism can be driven to drive the two screw rods (3) Reverse rotation, the light source assembly is arranged radially between the two screw rods (3), the light source assembly is threadedly connected with the two screw rods (3) respectively, and can follow the The rotation of the screw rod (3) moves along the axial direction of the screw rod (3). 3. The two-stage continuously adjustable concentrating photothermal device according to claim 2, characterized in that: the gear mechanism includes a driving gear (8) and two driven gears (9), and the driven gears (9) radially arranged on the screw mandrels (3) one by one and fixedly connected with the corresponding said screw mandrels (3), the driving gear (8) is arranged on two said screw mandrels (3) ), and mesh with the two driven gears (9) respectively, the output shaft of the first motor (6) is connected with the driving gear (8) and drives the driving gear (8) Drive the two driven gears (9) to rotate, and then drive the two screw rods (3) to rotate in reverse. 4. The two-stage continuously adjustable concentrating photothermal device according to claim 2, characterized in that it also includes a heat dissipation mechanism (10), and the heat dissipation mechanism (10) is arranged on the two screw rods (3 ), and between the gear mechanism and the light source assembly. 5. The two-stage continuously adjustable concentrating photothermal device according to claim 2, characterized in that: the light source assembly includes a light source (11), a reflector (12), a support plate (13) and two shelves Rod (14), the support plate (13) is arranged radially between the two said screw rods (3), and the two said gear rods (14) are arranged on the said screw rods (3) in one-to-one correspondence , and the two gear rods (14) are arranged oppositely, the reflector (12) is inlaid on the support plate (13), and the light source (11) is arranged in the reflector (12) , the gear rod (14) is arranged on the screw rod (3) and is fixedly connected with the edge of the support disc (13). 6. The two-stage continuously adjustable concentrating photothermal device according to claim 2, characterized in that: the concentrating assembly includes a Fresnel lens (15), a concave mirror (16) and a reflector (17) , the Fresnel lens (15) is arranged at one end of the primary lens barrel (1) close to the first adjustment assembly, and is fixedly connected with the front cover (4) through a mirror clip (18), the The concave mirror (16) is sealed and arranged at the end of the primary lens barrel (1) away from the first stage adjustment assembly, and the reflective mirror (17) is arranged on the Fresnel lens (15) through a support rod (19). between the concave mirror (16) and on the central axis of the concave mirror (16), so that the light reflected by the concave mirror (16) can reach the reflector (17) and pass through the reflective After being reflected by the mirror (17), it enters the secondary lens barrel (2) and exits from the light exit assembly. 7. The two-stage continuously adjustable concentrating photothermal device according to claim 6, characterized in that: the light concentrating assembly further includes a light leak (20), and the light leak (20) is arranged on the one The Fresnel lens (15) in the primary lens barrel (1) is away from the side of the primary adjustment assembly, and one end of the light leaker (20) with a small diameter is close to the primary lens barrel (1) One end of the primary adjustment assembly is connected, and one end with a thick diameter is connected with the end of the screw rod (3) close to the primary lens barrel (1). 8. The two-stage continuously adjustable concentrating photothermal device according to claim 1, characterized in that: the second stage adjustment assembly includes a second motor (21), a helical gear (22) and a screw (23) , the second motor (21) is arranged on the side wall of the secondary lens barrel (2), the screw (23) is arranged in the secondary lens barrel (2) and threaded with the light output assembly connected, and the output shaft of the second motor (21) is in transmission connection with the helical gear (22), and the helical gear (22) passes through the side wall of the secondary lens barrel (2) and is connected with the The screw (23) is engaged with threads, the second motor (21) drives the helical gear (22) to rotate, the helical gear (22) drives the screw (23) to rotate, and then drives the light output The assembly moves axially up and down along the screw rod (23). 9. The two-stage continuously adjustable concentrating photothermal device according to claim 8, characterized in that: the light output assembly includes a convex lens (24) and a bracket (25), and the bracket (25) is arranged on the In the secondary lens barrel (2), and the bracket (25) is threadedly connected with the screw rod (23), the second motor (21) drives the screw rod (23) through the helical gear (22) Rotate, the screw (23) rotates to drive the support (25) to move up and down, and the convex lens (24) is arranged on the support (25), and can move up and down together with the support (25). 10. The two-stage continuously adjustable concentrating photothermal device according to any one of claims 1 to 9, characterized in that: the primary lens barrel (1) and the secondary lens barrel (2) are both made of stainless steel Silver plated inner tube.