Graded water-cooling high-energy laser total absorption device

Abstract

The invention discloses a graded water-cooling high-energy laser total absorption device which comprises an absorption barrel and a water-cooling module. The water cooling module comprises a first-stage cooling water tank, a second-stage cooling water tank and a third-stage cooling box; a water circulation channel is provided between the absorption barrel and the primary cooling water tank by a first water inlet pipe and a first water return pipe; the first-stage cooling water tank and the second-stage cooling water tank are blocked by a graded water partition plate, and a water circulation channel is provided by a communicating water pipe and a water partition plate communicating hole in the graded water partition plate; a water circulation channel is provided between the second-stage cooling water tank and the third-stage cooling tank through a second water inlet pipe and a second water return pipe. Water is used as a direct absorber, absorption of continuous high-energy laser in a million-watt-level power range is achieved, the power level coverage range is wide, and wide applicability is achieved; according to absorption and full-automatic graded water cooling of lasers of different power grades, insufficient or excessive flowing of cooling water is avoided, the water cooling effect is guaranteed, and high reliability is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of high-energy lasers and relates to a graded water-cooled high-energy laser full absorption device. Background Art

[0002] A series of tests will be conducted during the research and development, testing and identification of high-energy laser products, and a laser absorption device will be installed in the test optical path. Existing laser absorption devices mostly use metal as a direct absorber, which is very easy to generate dust due to ablation damage, polluting the laboratory environment and laser lens; some laser absorption devices do not contain circulating water cooling function, and the laser power they can withstand is limited; some laser absorption devices with circulating water cooling function have a closed circulating water cooling module, which is difficult to add and change water, and the water flow is constant. When responding to low-power laser incidence, the flow is excessive, resulting in waste of pump power and energy. When responding to high-energy laser incidence, the flow is insufficient. After absorbing the laser energy, it cannot dissipate heat in time, and its temperature may continue to rise, affecting the service life of the laser absorption device, and posing a safety hazard. The power level of high-energy laser products continues to increase during the update and iteration process, and there is an urgent need for laser absorption devices that can withstand higher power levels. Summary of the invention

[0003] (I) Purpose of the invention

[0004] The purpose of the present invention is to provide a full absorption and full-automatic graded water cooling solution for lasers of different power levels, which utilizes water to fully absorb the laser, and realizes full-automatic graded water cooling through temperature monitoring and graded water circulation, thereby avoiding insufficient or excessive cooling water flow, ensuring water cooling effect and reliability, and realizing absorption of lasers of higher power levels and rapid addition and replacement of water in working state.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the present invention provides a graded water-cooled high-energy laser full absorption device, which includes an absorption barrel 1 and two water cooling modules; the water cooling module includes a primary cooling water tank 25, a secondary cooling water tank 21 and a tertiary cooling box 18; a water circulation channel is provided between the absorption barrel 1 and the primary cooling water tank 25 by a first water inlet pipe 2 and a first return water pipe 24; the primary cooling water tank 25 and the secondary cooling water tank 21 are blocked by a graded water baffle 8, and a water circulation channel is provided by a connecting water pipe 10 and a water baffle connecting hole 22 on the graded water baffle 8; a water circulation channel is provided between the secondary cooling water tank 21 and the tertiary cooling box 18 by a second water inlet pipe 12 and a second return water pipe 19.

[0007] The absorption barrel 1 includes a barrel body 101, a front window 102 and a rear window 109 are respectively arranged at the front and rear ends of the barrel body 101, a laser beam expansion lens 105 is arranged at the front window 102, and a light reflection cone 112 is arranged at the rear window 109. The barrel body 101 is filled with water as a direct absorption medium for the laser.

[0008] The laser beam expanding lens 105 is placed in a mirror box 108 , and the mirror box 108 is installed on the front window 102 . The laser beam expanding lens 105 is arranged to be tilted 5° to the left or right. The laser beam expanding lens 105 is a plano-concave mirror.

[0009] Among them, the light reflection cone 112 is installed on the rear window 109, the outer surface of the light reflection cone 112 is coated with a high reflection film layer, and stepped holes are drilled inside to increase the heat dissipation area; a rear window cover 110 is set at the rear window 109, and a hydraulic quick connector 111 is set on the rear window cover 110.

[0010] Among them, handles 115 are respectively provided at both ends of the top of the barrel body 101 of the absorption barrel 1; an exhaust joint 118 is provided at the center of the top of the barrel body 101, two absorption barrel cooling water joints 117 and two absorption barrel auxiliary cooling water joints 119 are provided on the outer wall of the barrel body 101, and two light reflection cone cooling water joints 116 are provided at the rear end of the barrel body 101.

[0011] Among them, a front window cover 103 is arranged on the front window 102 of the barrel body 101, the mirror box 108 is installed on the front window cover 103, a mirror box cover 107 is arranged on the mirror box 108, a plano-concave mirror sealing gasket 104 is arranged between the laser beam expansion lens 105 and the mirror box 108, a front window O-type sealing ring 106 is arranged between the mirror box 108 and the front window cover 103, a rear window O-type sealing ring 113 is arranged between the rear window cover 110 and the light reflecting cone 112, and a first temperature sensor 114 is arranged on the top of the inner wall of the barrel body 101.

[0012] The first water inlet pipe 2 is located on one side of the primary cooling water tank 25 and is installed with a first one-way throttle valve 5 and a first water pump 4 ; the side wall of the primary cooling water tank 25 is installed with a second temperature sensor 3 and a low water level sensor 23 .

[0013] Among them, the primary cooling water tank 25 and the secondary cooling water tank 21 share a box body, which is divided into two spaces by a graded water baffle 8; the shared box body is equipped with a water inlet cover plate 20 at the top of the secondary cooling water tank 21; a connecting water pipe 10 is installed on the graded water baffle 8, and a second one-way throttle valve 6 and a second water pump 7 are installed on the side of the primary cooling water tank 25 of the connecting water pipe 10.

[0014] A third temperature sensor 9 is installed on the side wall of the secondary cooling water tank 21 ; a third one-way throttle valve 11 and a third water pump 13 are installed on one side of the second cooling water tank 21 on the second water inlet pipe 12 .

[0015] The third-stage cooling box 18 is equipped with an evaporator 14 , a compressor 15 , a condenser 16 and a fourth one-way throttle valve 17 which are sequentially connected through pipelines, and the fourth one-way throttle valve 17 is connected to the evaporator 14 .

[0016] (III) Beneficial effects

[0017] The hierarchical water-cooled high-energy laser full absorption device provided by the above technical solution has the following features:

[0018] Beneficial effects:

[0019] 1. The present invention uses water as a direct absorber to achieve the absorption of continuous high-energy lasers in the megawatt power range, with a wide range of power levels and wide applicability.

[0020] 2. The present invention provides an absorption and fully automatic graded water cooling solution for lasers of different power levels, avoiding insufficient or excessive cooling water flow, ensuring the water cooling effect, and having high reliability.

[0021] 3. The present invention uses a combination of closed and open water circulation channels to overcome the difficulty of adding and changing water manually and realizes adding and changing water in a working state.

[0022] 4. The present invention performs a split design for each functional module, which facilitates the design and arrangement of the optical path and improves the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of the hierarchical water-cooled high-energy laser total absorption device of the present invention.

[0024] Figure 2 It is a schematic diagram of the external structure of the absorption barrel of the present invention.

[0025] Figure 3 It is a schematic diagram of the internal structure of the absorption barrel of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0027] like Figures 1 to 3As shown, the graded water-cooled high-energy laser full absorption device of this embodiment is divided into two modules: an absorption barrel 1 and a water cooling module; the water cooling module includes a primary cooling water tank 25, a secondary cooling water tank 21 and a tertiary cooling box 18; a water circulation channel is provided between the absorption barrel 1 and the primary cooling water tank 25 by a first water inlet pipe 2 and a first water return pipe 24; the primary cooling water tank 25 and the secondary cooling water tank 21 are blocked by a graded water baffle 8, and a water circulation channel is provided by a connecting water pipe 10 and a water baffle connecting hole 22 on the graded water baffle 8; a water circulation channel is provided between the secondary cooling water tank 21 and the tertiary cooling box 18 by a second water inlet pipe 12 and a second water return pipe 19.

[0028] The absorption barrel 1 includes a barrel body 101, a front window 102 and a rear window 109 are respectively arranged at the front and rear ends of the barrel body 101, a laser beam expansion lens 105 is arranged at the front window 102, and a light reflection cone 112 is arranged at the rear window 109. The barrel body 101 is filled with water as a direct absorption medium for the laser.

[0029] The laser beam expansion lens 105 is placed in a mirror box 108 , and the mirror box 108 is installed on the front window 102 . The laser beam expansion lens 105 is arranged to be tilted 5° to the left or right to prevent the reflected laser from damaging the laser source.

[0030] The laser beam expansion lens 105 is a plano-concave lens with a coating on the surface and has the characteristics of high transmittance and high damage threshold.

[0031] The light reflection cone 112 is installed on the rear window 109. The outer surface of the light reflection cone 112 is plated to have high reflectivity. Step holes are drilled inside the light reflection cone 112 to increase the heat dissipation area.

[0032] A rear window cover plate 110 is disposed at the rear window 109 , and a hydraulic quick connector 111 is disposed on the rear window cover plate 110 .

[0033] The front window 102, the laser beam expansion lens 105, the light reflection cone 112, the rear window 109, and the hydraulic quick connector 111 are all reliably connected to the barrel body 101 and are waterproof and sealed.

[0034] The absorption barrel 1 is connected to the primary cooling water tank 25 by a hydraulic quick connector, which is convenient for optical path construction and disassembly during operation and maintenance.

[0035] The first water inlet pipe 2 is located on one side of the primary cooling water tank 25 and is installed with a first one-way throttle valve 5 and a first water pump 4 .

[0036] The second temperature sensor 3 and the low water level sensor 23 are installed on the side wall of the primary cooling water tank 25 .

[0037] The primary cooling water tank 25 and the secondary cooling water tank 21 share a box body, and two spaces are divided by the graded water baffle 8. A water inlet cover plate 20 is installed at the top of the secondary cooling water tank 21 of the shared box body.

[0038] A connecting water pipe 10 is installed on the grading water baffle 8, and a second one-way throttle valve 6 and a second water pump 7 are installed on one side of the primary cooling water tank 25 of the connecting water pipe 10. A water baffle connecting hole 22 is arranged on the upper part of the grading water baffle 8 for water flow to pass through.

[0039] A third temperature sensor 9 is installed on the side wall of the secondary cooling water tank 21 .

[0040] The second water inlet pipe 12 is installed with a third one-way throttle valve 11 and a third water pump 13 on one side of the secondary cooling water tank 21 .

[0041] The third-stage cooling box 18 is equipped with an evaporator 14 , a compressor 15 , a condenser 16 and a fourth one-way throttle valve 17 which are sequentially connected through pipelines. The fourth one-way throttle valve 17 is connected to the evaporator 14 .

[0042] The top ends of the barrel body 101 of the absorption barrel 1 are provided with handles 115 for lifting and carrying when arranging the optical path. An exhaust joint 118 is provided at the center of the top of the barrel body 101, two absorption barrel cooling water joints 117 and two absorption barrel auxiliary cooling water joints 119 are provided on the outer wall of the barrel body 101, and two light reflection cone cooling water joints 116 are provided at the rear end of the barrel body 101.

[0043] A front window cover plate 103 is provided on the front window 102 of the barrel body 101, a mirror box 108 is mounted on the front window cover plate 103, a mirror box cover 107 is provided on the mirror box 108, a plano-concave mirror sealing gasket 104 is provided between the laser beam expansion lens 105 and the mirror box 108, and a front window O-type sealing ring 106 is provided between the mirror box 108 and the front window cover plate 103. A rear window O-type sealing ring 113 is provided between the rear window cover plate 110 and the light reflection cone 112. A first temperature sensor 114 is provided on the top of the inner wall of the barrel body 101.

[0044] like Figure 2 As shown, the water cooling module can be connected to part or all of the absorption barrel light reflection cone cooling water connector 116, the absorption barrel cooling water connector 117, and the absorption barrel auxiliary cooling water connector 119 according to the laser power level.

[0045] like Figure 3 As shown, the laser enters the absorption barrel 1, and enters the water body after being expanded by the laser beam expansion lens 105, and the laser energy is absorbed by the water body. Lasers of different wavelengths can be reflected back and forth on the outer surface of the light reflection cone 112 and the inner surface of the barrel body 101, and the energy can be fully absorbed by the water body.

[0046] The hierarchical water-cooled high-energy laser full absorption device is started, and the first one-way throttle valve 5 is controlled to operate in a small flow mode by default. The cooling water in the primary cooling water tank 25 is injected into the absorption barrel 1 through the first one-way throttle valve 5 and the first water pump 4, and the water in the absorption barrel is squeezed back to the primary cooling water tank 25 through the first return pipe 24, and the first-stage circulating water cooling is repeated. Before receiving the laser, the exhaust joint 118 should be opened to remove the bubbles in the water body and then work normally to avoid bubbles affecting the water body's absorption of laser energy.

[0047] When the first temperature sensor 114 in the absorption barrel 1 detects that the water temperature reaches a certain set value (for example, 40° C., this parameter can be set manually), the first one-way throttle valve 5 is controlled to operate in a large flow mode to speed up water exchange.

[0048] When the second temperature sensor 3 in the primary cooling water tank 25 detects that the water temperature reaches a certain set value (for example, 40°C, this parameter can be set manually), the second one-way throttle valve 6 and the second water pump 7 are controlled to operate, and the hot water in the primary cooling water tank 25 is injected into the secondary cooling water tank 21 through the second one-way throttle valve 6 and the second water pump 7. The liquid level in the secondary cooling water tank 21 rises, and an equal amount of water overflows the connecting hole 22 of the graded water baffle 8 and flows into the primary cooling water tank 25, realizing the second-stage circulating water cooling.

[0049] When the third temperature sensor 9 in the secondary cooling water tank 21 detects that the water temperature reaches a certain set value (for example, 40°C, this parameter can be set manually), the third one-way throttle valve 11, the third water pump 13 and the tertiary cooling box 18 are controlled to operate, and the hot water in the secondary cooling water tank 21 is injected into the tertiary cooling box 18 through the third one-way throttle valve 11 and the third water pump 13, and the water is quickly cooled in the evaporator 14 through the condenser 16 and the compressor 15, and the cooled water returns to the secondary cooling water tank 21 to realize the third-stage circulating water cooling.

[0050] The starting thresholds of the one-way throttle valve and the water pump controlled by each temperature sensor can be manually set according to the room temperature and the laser power level.

[0051] The low water level sensor 23 can monitor the amount of water in the primary cooling water tank. When the water level in the primary cooling water tank 25 is lower than the low water level sensor, the system will give an alarm to prompt the staff to add cooling water.

[0052] The water injection port cover plate 20 can be used to add and replace cooling water when the device is shut down or started up.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A hierarchical water-cooled high-energy laser total absorption device, characterized in that: The invention comprises two modules, namely an absorption barrel (1) and a water cooling module; the water cooling module comprises a primary cooling water tank (25), a secondary cooling water tank (21) and a tertiary cooling box (18); a water circulation channel is provided between the absorption barrel (1) and the primary cooling water tank (25) by a first water inlet pipe (2) and a first water return pipe (24); a water circulation channel is provided between the primary cooling water tank (25) and the secondary cooling water tank (21) by a graded water baffle (8); and a water circulation channel is provided by a connecting water pipe (10) and a water baffle connecting hole (22) on the graded water baffle (8); and a water circulation channel is provided between the secondary cooling water tank (21) and the tertiary cooling box (18) by a second water inlet pipe (12) and a second water return pipe (19).

2. The hierarchical water-cooled high-energy laser total absorption device according to claim 1, characterized in that: The absorption barrel (1) comprises a barrel body (101), a front window (102) and a rear window (109) are respectively arranged at the front and rear ends of the barrel body (101), a laser beam expansion lens (105) is arranged at the front window (102), and a light reflection cone (112) is arranged at the rear window (109), and the barrel body (101) is filled with water as a direct absorption medium for laser.

3. The hierarchical water-cooled high-energy laser total absorption device according to claim 2, characterized in that: The laser beam expansion lens (105) is arranged in a mirror box (108), the mirror box (108) is installed on the front window (102), and the laser beam expansion lens (105) is arranged to be tilted 5 degrees to the left or right; the laser beam expansion lens (105) is a plano-concave mirror.

4. The hierarchical water-cooled high-energy laser total absorption device according to claim 3, characterized in that: A light reflection cone (112) is installed on the rear window (109), the outer surface of the light reflection cone (112) is plated with a high reflection film layer, and a stepped hole is drilled inside to increase the heat dissipation area; a rear window cover plate (110) is arranged at the rear window (109), and a hydraulic quick connector (111) is arranged on the rear window cover plate (110).

5. The hierarchical water-cooled high-energy laser total absorption device according to claim 4, characterized in that: Handles (115) are respectively arranged at both ends of the top of the barrel body (101) of the absorption barrel (1); an exhaust joint (118) is arranged at the center of the top of the barrel body (101); two absorption barrel cooling water joints (117) and two absorption barrel auxiliary cooling water joints (119) are arranged on the outer wall of the barrel body (101); and two light reflection cone cooling water joints (116) are arranged at the rear end of the barrel body (101).

6. The hierarchical water-cooled high-energy laser total absorption device according to claim 5, characterized in that: A front window cover plate (103) is arranged on the front window (102) of the barrel body (101), a mirror box (108) is mounted on the front window cover plate (103), a mirror box cover (107) is arranged on the mirror box (108), a plano-concave mirror sealing gasket (104) is arranged between the laser beam expansion lens (105) and the mirror box (108), a front window O-type sealing ring (106) is arranged between the mirror box (108) and the front window cover plate (103), a rear window O-type sealing ring (113) is arranged between the rear window cover plate (110) and the light reflection cone (112), and a first temperature sensor (114) is arranged on the top of the inner wall of the barrel body (101).

7. The hierarchical water-cooled high-energy laser total absorption device according to claim 6, characterized in that: The first water inlet pipe (2) is located on one side of the primary cooling water tank (25) and is installed with a first one-way throttle valve (5) and a first water pump (4); a second temperature sensor (3) and a low water level sensor (23) are installed on the side wall of the primary cooling water tank (25).

8. The hierarchical water-cooled high-energy laser total absorption device according to claim 7, characterized in that: The primary cooling water tank (25) and the secondary cooling water tank (21) share a box body, which is divided into two spaces by a graded water baffle (8); a water inlet cover plate (20) is installed at the top of the secondary cooling water tank (21) of the shared box body; a connecting water pipe (10) is installed on the graded water baffle (8), and a second one-way throttle valve (6) and a second water pump (7) are installed on one side of the connecting water pipe (10) of the primary cooling water tank (25).

9. The hierarchical water-cooled high-energy laser total absorption device according to claim 8, characterized in that: A third temperature sensor (9) is installed on the side wall of the secondary cooling water tank (21); and a third one-way throttle valve (11) and a third water pump (13) are installed on one side of the secondary cooling water tank (21) on the second water inlet pipe (12).

10. The hierarchical water-cooled high-energy laser total absorption device according to claim 9, characterized in that: An evaporator (14), a compressor (15), a condenser (16) and a fourth one-way throttle valve (17) which are sequentially connected via pipelines are installed in the third-stage cooling box (18); the fourth one-way throttle valve (17) is connected to the evaporator (14).

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