Cooling device for high-power laser cutting head

Abstract

The utility model discloses a cooling device for a high-power laser cutting head, and relates to the technical field of laser equipment cooling. The cooling device comprises a cooling water pipe assembly and a water circulation assembly, the cooling water pipe assembly comprises two semicircular pipes, a water inlet hole and a water outlet hole are formed in the plate face of the upper end of each semicircular pipe, and the two ends of openings of the two semicircular pipes are fixedly connected; the water inlet holes and the water outlet holes of the two semicircular ring pipes communicate with the water outlet end and the water inlet end of a water circulation assembly through pipelines correspondingly, the water circulation assembly comprises a cooling liquid tank and a tank cover, and a condensation pipe is fixedly installed at the lower end of a refrigerator fixedly installed at the upper end of the tank cover. The inner wall of the semicircular ring pipe is coated with a layer of heat dissipation silicone grease, so that the semicircular ring pipe is in full contact with the outer wall of the nozzle, and the heat exchange efficiency of the semicircular ring pipe and the nozzle is improved; the cooling liquid is cooled by the condenser pipe through the refrigerator, so that water exchanges heat with the cooling liquid in the cooling water pipe, and the water is cooled to a lower temperature.

Description

Technical Field

[0001] This utility model belongs to the field of laser equipment cooling technology, and in particular relates to a cooling device for a high-power laser cutting head. Background Technology

[0002] Laser cutting technology is a processing technique that uses high-energy lasers emitted by high-power laser equipment to cut materials such as metals. It has advantages such as high precision, small error, and smooth cut edges. After the laser cutting equipment generates high-energy laser in the dielectric cavity, it is focused by a lens group such as a collimating lens and a focusing lens and then emitted from the nozzle. The nozzle needs to withstand the high temperature of the laser, so a cooling device needs to be installed at the nozzle. However, when installing the water-cooled cooling ring, the installation is not tight because it is directly sleeved on the outside of the nozzle, resulting in a gap between the nozzle and the cooling ring, which leads to poor cooling effect. In addition, the cooling water in the cooling ring has poor cooling effect when circulating, resulting in poor cooling effect on the nozzle when heat exchange occurs.

[0003] To address these issues, we provide a cooling device for high-power laser cutting heads. Utility Model Content

[0004] The purpose of this invention is to provide a cooling device for a high-power laser cutting head. By connecting two semi-circular tubes in the cooling water pipe assembly to the outside of the nozzle and coating the inner wall of the semi-circular tubes with a layer of heat-dissipating silicone grease, the semi-circular tubes are in full contact with the outer wall of the nozzle, thereby improving the efficiency of heat exchange between the semi-circular tubes and the nozzle. Coolant is placed in the coolant tank in the water circulation assembly, and the water in the cooling water pipe assembly is circulated to the cooling water pipes in the coolant tank. The condenser cools the coolant by the refrigeration unit, and the water exchanges heat with the coolant in the cooling water pipes, thereby lowering the water temperature to a lower level.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a cooling device for a high-power laser cutting head, comprising a cooling water pipe assembly and a water circulation assembly. The cooling water pipe assembly includes two semi-circular pipes, the inner walls of which are coated with thermal grease. Water inlets are located on the upper surface of the semi-circular pipes near the outer edge, and water outlets are located on the upper surface of the semi-circular pipes near the inner edge. The two ends of the openings of the two semi-circular pipes are fixedly connected. The water inlets of the two semi-circular pipes are connected to the water outlet of the water circulation assembly via pipes, and the water outlets of the two semi-circular pipes are connected to the water inlets of the water circulation assembly via pipes. The water circulation assembly includes a coolant tank and a tank cover. A cooler is fixedly installed on the upper end of the tank cover, and a condenser tube is fixedly installed on the lower end of the cooler.

[0007] The present invention is further configured such that side ears are fixed on both sides of the open end of the semicircular ring tube, and the two side ears of the two semicircular ring tubes are respectively connected to each other and fixedly connected by studs.

[0008] The present invention is further configured such that a vertical semi-circular plate-shaped partition is fixedly provided on the lower side of the upper end plate of the semi-circular ring pipe. The partition is fixed on the plate surface between the water inlet and the water outlet on the semi-circular ring pipe, and the height of the partition is less than the height of the semi-circular ring pipe.

[0009] The present invention is further configured such that a group of liquid distribution plates are fixedly arranged in a circumferential array above the lower end plate of the semicircular ring tube. The liquid distribution plates are fixed in the cavity between the inner wall of the semicircular ring tube and the partition plate. The liquid distribution plates are perpendicular to the bottom plate of the semicircular ring tube, and the height of the liquid distribution plates is less than the height of the semicircular ring tube.

[0010] The present invention is further configured such that the tank cover has an inlet and an outlet, a water pump is fixedly installed above the outlet, the outlet end of the water pump is connected to the inlet on the tank cover through a pipe, the inlet end of the water pump is fixedly connected to a water-drawing capillary tube, the inlet is connected to the outlet on the tank cover through a pipe, and a cooling water pipe is installed inside the coolant tank, with both ends of the cooling water pipe connected to the inlet and the outlet respectively.

[0011] The present invention is further configured such that the cooling water pipe includes a set of vertical water pipes, the set of vertical water pipes are arranged in a circumferential array inside the coolant tank, and the set of vertical water pipes are interconnected with each other by connecting elbows.

[0012] The present invention is further configured such that a through hole is provided on the can lid surface and a pressure relief pipe is fixedly installed in the through hole. The lower end of the pressure relief pipe is open and the upper end is closed. The upper end of the pressure relief pipe extends out of the through hole on the can lid surface. A set of vent holes are arranged in a circumferential array on the side wall of the upper part of the can lid. A pressure relief valve core is slidably sleeved inside the pressure relief pipe. A compression spring is fixedly connected to the upper end of the pressure relief valve core. The end of the compression spring away from the pressure relief valve core is fixedly connected to the closed end of the pressure relief pipe.

[0013] This utility model has the following beneficial effects:

[0014] 1. This utility model improves the efficiency of heat exchange between the semicircular tubes and the nozzle by connecting two semicircular tubes in the cooling water pipe assembly to the outside of the nozzle and coating the inner wall of the semicircular tubes with a layer of heat dissipation grease.

[0015] 2. This utility model contains coolant in the coolant tank of the water circulation assembly, and circulates the water in the cooling water pipe assembly to the cooling water pipe in the coolant tank. The condenser cools the coolant by using a refrigerator, and the water exchanges heat with the coolant in the cooling water pipe, thereby lowering the water temperature to a lower level.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a cooling device for a high-power laser cutting head.

[0019] Figure 2 This is a schematic diagram of the cooling water pipe assembly.

[0020] Figure 3 This is a cross-sectional view of a semi-circular annular tube.

[0021] Figure 4 This is an exploded view of the water circulation component.

[0022] Figure 5 This is an exploded view of the pressure relief pipe.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1-Cooling water pipe assembly, 101-Semi-circular ring pipe, 101a-Water inlet, 101b-Water outlet, 101c-Baffle plate, 101d-Distribution plate, 101e-Side lug, 2-Water circulation assembly, 201-Cooling liquid tank, 201a-Cooling water pipe, 201a-1-Vertical water pipe, 201a-2-Connecting elbow, 202-Tank cover, 202a-Water outlet, 202a-1-Water pump, 202a-2-Water suction capillary tube, 202b-Water inlet, 203-Refrigerator, 203a-Condenser pipe, 204-Pressure relief pipe, 204a-Pressure relief vent, 204b-Pressure relief valve core, 204b-1-Compression spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] Please see Figures 1 to 3 This utility model is a cooling device for a high-power laser cutting head, including a cooling water pipe assembly 1 and a water circulation assembly 2. The cooling water pipe assembly 1 includes two semi-circular annular pipes 101, and the water circulation assembly 2 includes a coolant tank 201 and a tank cover 202. By connecting the two semi-circular annular pipes 101 in the cooling water pipe assembly 1 to the outside of the nozzle and coating the inner wall of the semi-circular annular pipes 101 with a layer of heat dissipation grease, the semi-circular annular pipes 101 are in full contact with the outer wall of the nozzle, thereby improving the efficiency of heat exchange between the semi-circular annular pipes 101 and the nozzle.

[0028] Specifically, the inner wall of the semicircular tube 101 is coated with thermal grease. A water inlet hole 101a is opened on the plate surface near the outer edge of the upper end of the semicircular tube 101, and a water outlet hole 101b is opened on the plate surface near the inner edge of the upper end of the semicircular tube 101. The two ends of the openings of the two semicircular tubes 101 are fixedly connected. The water inlet holes 101a of the two semicircular tubes 101 are connected to the water outlet of the water circulation component 2 through pipes. The water outlet holes 101b of the two semicircular tubes 101 are connected to the water inlet of the water circulation component 2 through pipes. A cooler 203 is fixedly installed on the upper end of the tank cover 202, and a condenser tube 203a is fixedly installed on the lower end of the cooler 203.

[0029] Furthermore, side lugs 101e are fixed on both sides of the open end of the semicircular annular tube 101, and the two side lugs 101e at both ends of the two semicircular annular tubes 101 are respectively connected to each other by studs.

[0030] Furthermore, a vertical semi-circular baffle 101c is fixedly provided on the lower side of the upper end plate of the semi-circular annular tube 101. The baffle 101c is fixed on the plate surface between the water inlet hole 101a and the water outlet hole 101b on the semi-circular annular tube 101. The height of the baffle 101c is less than the height of the semi-circular annular tube 101, so that the cooling water entering from the water inlet hole 101a first flows in from the top, and then enters the cavity between the baffle 101c and the inner wall of the semi-circular annular tube 101 through the gap between the lower end of the baffle 101c and the lower end plate surface of the semi-circular annular tube 101. Under the action of the communicating vessel principle, it gradually fills the cavity and exchanges heat with the inner wall of the semi-circular annular tube 101, thereby cooling the nozzle, and finally discharged from the water outlet hole 101b.

[0031] Furthermore, a group of liquid distribution plates 101d are fixedly arranged in a circumferential array above the lower end plate of the semicircular annular tube 101. The liquid distribution plates 101d are fixed in the cavity between the inner wall of the semicircular annular tube 101 and the partition plate 101c. The liquid distribution plates 101d are perpendicular to the bottom plate of the semicircular annular tube 101. The height of the liquid distribution plates 101d is less than the height of the semicircular annular tube 101. The liquid distribution plates 101d distribute the injected cooling water evenly, so that the cooling water cools the inner wall of the semicircular annular tube 101 more evenly.

[0032] The operation process in this embodiment is as follows:

[0033] Thermal grease is applied to the inner walls of the two semicircular tubes 101. The two semicircular tubes 101 are then fitted onto the outside of the nozzle, aligning the lugs 101e at both ends and securing them with bolts to ensure a firm fit between the semicircular tubes 101 and the nozzle. Water from the water circulation assembly is then poured in through the inlet hole 101a. After entering the bottom of the semicircular tubes 101, the cooling water flows out from the other side of the partition 101c and exchanges heat with the inner walls of the semicircular tubes 101, thereby cooling the nozzle.

[0034] Example 2

[0035] Please see Figures 1 to 5 Based on Example 1, the cooling water pipe 201a includes a set of vertical water pipes 201a-1. Coolant is placed in the coolant tank 201 in the water circulation assembly 2, and the water in the cooling water pipe assembly 2 is circulated to the cooling water pipe 201a in the coolant tank 201. The cooler 203 cools the coolant by condensing the condenser 203a, so that the water exchanges heat with the coolant in the cooling water pipe 201a, thereby lowering the water temperature to a lower level.

[0036] Specifically, the tank cover 202 has an inlet 202b and an outlet 202a. A water pump 202a-1 is fixedly installed above the outlet 101b. The outlet end of the water pump 202a-1 is connected to the inlet 202b on the tank cover 202 through a pipe. The inlet end of the water pump 202a-1 is fixedly connected to a water suction capillary tube 202a-2. The inlet 101a is connected to the outlet 202a on the tank cover 202 through a pipe. A cooling water pipe 201a is installed inside the coolant tank 201. The two ends of the cooling water pipe 201a are connected to the inlet 202b and the outlet 202a, respectively.

[0037] Furthermore, a set of vertical water pipes 201a-1 are arranged in a circumferential array inside the coolant tank 201. The set of vertical water pipes 201a-1 are interconnected with each other through connecting elbows 201a-2, so that the cooling water in the cooling water pipes is fully cooled by the coolant in the coolant tank 201.

[0038] Furthermore, a through hole is provided on the surface of the can lid 202, and a pressure relief pipe 204 is fixedly installed in the through hole. The lower end of the pressure relief pipe 204 is open and the upper end is closed. The upper end of the pressure relief pipe 204 extends out of the through hole on the surface of the can lid 202. A set of vent holes are arranged in a circumferential array on the side wall of the upper part of the can lid 202. A pressure relief valve core 204b is slidably sleeved inside the pressure relief pipe 204. A compression spring 204b-1 is fixedly connected to the upper end of the pressure relief valve core 204b. The end of the compression spring 204b-1 away from the pressure relief valve core 204b is fixedly connected to the closed end of the pressure relief pipe 204, which is used to regulate the air pressure in the coolant tank 201.

[0039] The operation process in this embodiment is as follows:

[0040] Cooling water enters the cooling water pipe 201a from the cooling water pipe assembly 1 through the inlet 202b. The cooler 203 causes the condenser 203a to produce a low temperature, which lowers the temperature of the coolant in the coolant tank 201. The water in the cooling water pipe 201a exchanges heat with the coolant, which lowers the water temperature. Under the action of the water pump 202a-1 above the outlet 101b, the water is drawn out from the water capillary tube 202a-2 and pumped into the cooling water pipe assembly 1 to cool the laser nozzle.

[0041] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A cooling device for a high-power laser cutting head, comprising a cooling water pipe assembly (1) and a water circulation assembly (2), characterized in that: The cooling water pipe assembly (1) includes two semi-circular annular pipes (101). The inner wall of each semi-circular annular pipe (101) is coated with thermal grease. An inlet hole (101a) is formed on the upper end of each semi-circular annular pipe (101) near the outer edge of the outer ring, and an outlet hole (101b) is formed on the upper end of each semi-circular annular pipe (101) near the inner edge of the inner ring. The two openings of the two semi-circular annular pipes (101) are fixedly connected. The water inlet (101a) is connected to the water outlet of the water circulation assembly (2) through a pipe, and the water outlets (101b) on the two semi-circular pipes (101) are connected to the water inlet of the water circulation assembly (2) through pipes. The water circulation assembly (2) includes a coolant tank (201) and a tank cover (202). A cooler (203) is fixedly installed on the upper end of the tank cover (202), and a condenser tube (203a) is fixedly installed on the lower end of the cooler (203).

2. The cooling device for a high-power laser cutting head according to claim 1, characterized in that: Both sides of the open end of the semicircular annular tube (101) are fixedly provided with side ears (101e), and the two side ears (101e) of the two semicircular annular tubes (101) are respectively connected to each other and fixedly connected by studs.

3. A cooling device for a high-power laser cutting head according to claim 2, characterized in that: A vertical semi-circular plate-shaped partition (101c) is fixed on the lower side of the upper end plate of the semi-circular pipe (101). The partition (101c) is fixed on the plate surface between the water inlet hole (101a) and the water outlet hole (101b) on the semi-circular pipe (101). The height of the partition (101c) is less than the height of the semi-circular pipe (101).

4. A cooling device for a high-power laser cutting head according to claim 3, characterized in that: A group of liquid distribution plates (101d) are fixedly arranged in a circumferential array above the lower end plate of the semicircular ring tube (101). The liquid distribution plates (101d) are fixed in the cavity between the inner wall of the semicircular ring tube (101) and the partition plate (101c). The liquid distribution plates (101d) are perpendicular to the bottom plate of the semicircular ring tube (101), and the height of the liquid distribution plates (101d) is less than the height of the semicircular ring tube (101).

5. A cooling device for a high-power laser cutting head according to claim 1, characterized in that: The tank cover (202) is provided with an inlet (202b) and an outlet (202a). A water pump (202a-1) is fixedly installed above the outlet (101b). The outlet end of the water pump (202a-1) is connected to the inlet (202b) on the tank cover (202) through a pipe. The inlet end of the water pump (202a-1) is fixedly connected to a water-drawing capillary tube (202a-2). The inlet (101a) is connected to the outlet (202a) on the tank cover (202) through a pipe. A cooling water pipe (201a) is installed inside the coolant tank (201). The two ends of the cooling water pipe (201a) are connected to the inlet (202b) and the outlet (202a) respectively.

6. A cooling device for a high-power laser cutting head according to claim 5, characterized in that: The cooling water pipe (201a) includes a set of vertical water pipes (201a-1), which are arranged circumferentially in the coolant tank (201). The set of vertical water pipes (201a-1) are interconnected with each other by connecting elbows (201a-2).

7. A cooling device for a high-power laser cutting head according to claim 6, characterized in that: The can lid (202) has a through hole on its surface and a pressure relief pipe (204) is fixedly installed inside the through hole. The pressure relief pipe (204) is open at the bottom and closed at the top. The upper end of the pressure relief pipe (204) extends out of the through hole on the surface of the can lid (202). A set of vent holes are arranged in a circumferential array on the side wall of the upper part of the can lid (202). A pressure relief valve core (204b) is slidably sleeved inside the pressure relief pipe (204). A compression spring (204b-1) is fixedly connected to the upper end of the pressure relief valve core (204b). The end of the compression spring (204b-1) away from the pressure relief valve core (204b) is fixedly connected to the closed end of the pressure relief pipe (204).

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