A pressure balancing device for laser shutters

Abstract

This utility model discloses a pneumatic pressure balancing device for laser shutters, belonging to the field of laser shutters. This pneumatic pressure balancing device connects a flexible hose to a hollow connector through a through-hole in the outer wall of the laser shutter housing. This isolates the internal chamber of the housing from the external environment. While achieving chamber sealing, the hose can adaptively expand or contract based on its elasticity, achieving internal and external pressure balance. This pneumatic pressure balancing device also has the advantages of simple structure, low cost, and small footprint.

Description

Technical Field

[0001] This utility model belongs to the field of laser shutters, specifically relating to a pressure balancing device for laser shutters. Background Technology

[0002] In the field of laser shutters, the air pressure balancing device of the shutter chamber is one of the core components to ensure the stable operation of the system. Laser shutters are widely used in high-power laser processing equipment, optical communication systems and precision optical instruments. Their core function is to quickly switch or block the laser transmission path through mechanical or electronic means. However, during high-speed switching and long-term operation, the air pressure inside the shutter chamber is prone to imbalance due to temperature changes, gas leakage or external environmental pressure fluctuations, which in turn causes the following problems: (1) deformation of optical components, laser light path deviation, affecting processing accuracy; (2) aging and cracking of sealing materials, allowing external dust, moisture and other substances to seep in and contaminate the optical surface.

[0003] Existing pressure balancing devices mostly use waterproof and breathable valves, which can alleviate pressure differences, but they can only prevent liquid water from entering the chamber, not water vapor. Vapor can easily condense on the surface of optical components, contaminating the optical surface and causing safety hazards. Some high-end optical shutters use active pressure control systems, such as miniature air pumps plus pressure sensors, but these have problems such as high cost, difficulty in integration, and slow response speed. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide a low-cost, well-sealed, and dynamically fast pressure-adjustable air pressure balancing device for laser shutters.

[0005] Technical solution: The present invention provides a pneumatic pressure balancing device for a laser shutter, wherein the laser shutter includes a housing with a cavity, and a first through hole communicating with the cavity is provided on the outer wall of the housing; the pneumatic pressure balancing device includes a hollow first connector and an elastic flexible tube, the first connector is used to connect one end of the flexible tube to the first through hole, and the first connector is fixed on the first through hole; the other end of the flexible tube is closed.

[0006] Furthermore, the first connector and the hose are located inside the cavity.

[0007] Optionally, the first connector and the hose are located outside the chamber.

[0008] Furthermore, the hose is made of rubber; the first connector is a miniature pneumatic connector, and the first connector is threadedly connected to the first through hole.

[0009] Furthermore, a transparent observation window is provided at the opening end of the shell, and a sealing ring is provided between the shell and the transparent observation window. The sealing ring is located in a groove on the outer wall of the opening end of the shell.

[0010] Optionally, the present invention provides a pressure balancing device for a laser shutter, wherein the laser shutter includes a housing with a cavity, and the outer wall of the housing is provided with a first through hole and a second through hole communicating with the cavity; the pressure balancing device includes a hollow first connector, a hollow second connector, and an elastic flexible tube, wherein the first connector is used to connect one end of the flexible tube to the first through hole and is fixed on the first through hole; the second connector is used to connect the other end of the flexible tube to the second through hole and is fixed on the second through hole.

[0011] Furthermore, the first connector, the second connector, and the hose are located within the chamber.

[0012] Optionally, the first connector, the second connector, and the hose are located outside the cavity.

[0013] Furthermore, the hose is made of rubber; the connector is a miniature pneumatic fitting, which is threaded into the corresponding through hole.

[0014] Furthermore, a transparent observation window is provided at the opening end of the shell, and a sealing ring is provided between the shell and the transparent observation window. The sealing ring is located in a groove on the outer wall of the opening end of the shell.

[0015] Beneficial effects: Compared with the prior art, this utility model has the following advantages:

[0016] (1) The pressure balancing device uses a flexible hose to separate the chamber from the external environment. It not only effectively seals the chamber, but also allows the hose to passively expand or contract to achieve pressure balance when the temperature difference between the inside and outside of the chamber causes changes in the internal and external pressure difference, thus adapting to different internal and external pressure difference environments.

[0017] (2) The air pressure balance device has a simple structure, low cost and small space occupation. It only needs to open one or two through holes in the laser shutter housing, which reduces the overall design and processing difficulty of the laser shutter.

[0018] (3) Based on the size of the chamber volume and the temperature change range, the pressure balance adjustment range required by different laser shutter products can be matched by changing the size of the opening, the length, thickness, material and other parameters of the hose. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a pneumatic pressure balancing device for a laser shutter provided in an embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of another air pressure balancing device for laser shutters provided in this embodiment of the present invention. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Appendix Figures 1 to 2 The accompanying figure labels are as follows:

[0023] 1. Housing; 2. Chamber; 3. Groove; 4. First through hole; 5. First connector; 6. Flexible hose; 7. Second through hole; 8. Second connector.

[0024] Example 1

[0025] like Figure 1 As shown, Embodiment 1 provides a pressure balancing device for a laser shutter. The laser shutter includes a housing 1 with a chamber 2. A first through hole 4 communicating with the chamber 2 is provided on the outer wall of the housing 1. A transparent observation window is provided at the open end of the housing 1. A sealing ring is provided between the housing 1 and the transparent observation window to ensure the airtightness of the chamber 2. The sealing ring is provided in a groove 3 provided on the outer wall of the open end of the housing 1.

[0026] The air pressure balancing device includes a hollow first connector 5 and a flexible hose 6. In this embodiment, the hose 6 is a rubber hose, and the first connector 5 is a miniature pneumatic connector. The first connector 5 connects one end of the hose 6 to a first through hole 4, and the first connector 5 is threaded onto the first through hole 4. The other end of the hose 6 is sealed to ensure the airtightness of the chamber 2. In this embodiment, the first connector 5 and the hose 6 are located inside the chamber 2.

[0027] Because the hose 6 is elastic, when the temperature inside and outside the chamber 2 changes or other reasons cause the pressure difference between the inside and outside to change, the hose 6 will passively compress or expand to balance the pressure inside and outside the chamber 2, thus achieving a state of pressure balance.

[0028] Example 2

[0029] Example 2 is basically the same as Example 1, except that the first connector 5 and the hose 6 are located outside the chamber 2.

[0030] When the air pressure inside chamber 2 is greater than the outside air pressure, the wall of hose 6 expands to balance the air pressure; when the air pressure inside chamber 2 is less than the outside air pressure, the wall of hose 6 is squeezed to balance the air pressure.

[0031] Example 3

[0032] like Figure 2 As shown, Embodiment 3 provides a pressure balancing device for a laser shutter. The laser shutter includes a housing 1 with a chamber 2. The outer wall of the housing 1 has a first through hole 4 and a second through hole 7 communicating with the chamber 2. A transparent observation window is provided at the open end of the housing 1. A sealing ring is provided between the housing 1 and the transparent observation window to ensure the airtightness of the chamber 2. The sealing ring is provided in a groove 3 provided on the outer wall of the open end of the housing 1.

[0033] The air pressure balancing device includes a hollow first connector 5, a hollow second connector 8, and a flexible hose 6. In this embodiment, the hose 6 is a rubber hose, and the first connector 5 and the second connector 8 are miniature pneumatic joints. The first connector 5 connects one end of the hose 6 to a first through hole 4, and the first connector 5 is threaded onto the first through hole 4. The second connector 8 connects the other end of the hose 6 to a second through hole 7, and the second connector 8 is threaded onto the second through hole 7. In this embodiment, the first connector 5, the second connector 8, and the hose 6 are located in the chamber 2.

[0034] When the air pressure inside chamber 2 is greater than the air pressure outside, the hose 6 contracts; when the air pressure inside chamber 2 is less than the air pressure outside, the hose 6 expands, thereby balancing the air pressure inside and outside chamber 2.

[0035] Example 4

[0036] Example 4 is basically the same as Example 3, except that the first connector 5, the second connector 8 and the hose 6 are located outside the chamber 2.

[0037] When the air pressure inside chamber 2 is greater than the air pressure outside, the hose 6 expands; when the air pressure inside chamber 2 is less than the air pressure outside, the hose 6 contracts, thereby balancing the air pressure inside and outside chamber 2.

Claims

1. A gas pressure balancing device for a laser shutter, the laser shutter comprising a housing (1) having a chamber (2), characterized in that, The outer wall of the housing (1) has a first through hole (4) that connects to the chamber (2); the air pressure balancing device includes a hollow first connector (5) and an elastic hose (6), the first connector (5) is used to connect one end of the hose (6) to the first through hole (4), the first connector (5) is fixed on the first through hole (4); the other end of the hose (6) is closed.

2. The air pressure balancing device for a laser shutter according to claim 1, characterized by, The first connector (5) and the hose (6) are located inside the chamber (2).

3. The air pressure balancing device for a laser shutter according to claim 1, characterized by, The first connector (5) and the hose (6) are located outside the chamber (2).

4. The air pressure balancing device for a laser shutter according to claim 1, characterized by, The hose (6) is made of rubber hose; the first connector (5) is made of miniature pneumatic connector and is threaded to the first through hole (4).

5. The air pressure balancing device for a laser shutter according to claim 1, wherein A transparent observation window is provided at the open end of the shell (1), and a sealing ring is provided between the shell (1) and the transparent observation window. The sealing ring is located in a groove (3) on the outer wall of the open end of the shell (1).

6. A gas pressure equalizing device for a laser shutter, the laser shutter comprising a housing (1) having a chamber (2), characterized in that The outer wall of the housing (1) is provided with a first through hole (4) and a second through hole (7) that connect to the chamber (2); the air pressure balancing device includes a hollow first connector (5), a hollow second connector (8) and an elastic hose (6). The first connector (5) is used to connect one end of the hose (6) to the first through hole (4) and the first connector (5) is fixed on the first through hole (4); the second connector (8) is used to connect the other end of the hose (6) to the second through hole (7) and the second connector (8) is fixed on the second through hole (7).

7. The air pressure balancing device for a laser shutter according to claim 6, characterized in that, The first connector (5), the second connector (8), and the hose (6) are located in the chamber (2).

8. The air pressure balancing device for a laser shutter according to claim 6, characterized in that, The first connector (5), the second connector (8), and the hose (6) are located outside the chamber (2).

9. The air pressure balancing device for a laser shutter according to claim 6, characterized in that, The hose (6) is made of rubber hose; the connector is a miniature pneumatic connector, and the connector is connected to the corresponding through hole thread.

10. The air pressure balancing device for a laser shutter according to claim 6, characterized in that, A transparent observation window is provided at the open end of the shell (1), and a sealing ring is provided between the shell (1) and the transparent observation window. The sealing ring is located in a groove (3) on the outer wall of the open end of the shell (1).

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