Drying device used in optical lens assembling process

Abstract

The utility model discloses a drying device used in an optical lens assembling process, which comprises a vacuum container, and an installation placing frame used for placing an optical lens is arranged at the bottom in the vacuum container; a gas inflation assembly mounted at the top of the vacuum container is arranged above the mounting placement frame; and a vacuum pumping system mounted at the bottom of the vacuum container is arranged below the mounting placement rack. According to the utility model, the optical lens is placed on the installation placing rack, the vacuum pumping system is utilized to vacuumize the interior of the vacuum container, and the gas inflation assembly is utilized to inflate nitrogen into the vacuum container, so that nitrogen inflation protection is carried out on the optical lens by means of the glue injection hole or the sealing opening of the optical lens, and dryness and stability of the interior of the optical lens are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical lens technical field, concretely relates to a drying device for optical lens assembly process. BACKGROUND

[0002] Optical lens is applied to multiple fields and faces complex and varied use environment. In order to protect optical lens from producing water mist under low temperature or growing mould after long time placement, part of projection type optical lens needs to be sealed, and nitrogen filling protection is carried out in the assembly process. Nitrogen filling of lens can effectively isolate moisture and oxygen in air, thereby keeping the dryness and stability of the inside of optical lens.

[0003] The process of nitrogen filling of optical lens is usually carried out after the assembly of optical lens. After precision assembly, the nitrogen filling interface designed in advance is connected to the nitrogen source, nitrogen is filled after vacuumizing, and finally the interface is sealed. This mode needs to design independent nitrogen filling interface.

[0004] And the conventional transmission type optical lens cannot design and reserve nitrogen filling interface due to small size and precise structure, and it brings great difficulty to design when the customer proposes nitrogen filling protection requirement. INVENTION CONTENTS

[0005] In view of the above problems in the prior art, the utility model provides a drying device for optical lens assembly process, which solves the problems that the conventional projection type optical lens cannot design gas filling interface and cannot carry out nitrogen filling protection.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] Provide a kind of drying device for optical lens assembly process, it includes vacuum container, the bottom in vacuum container is provided with the installation placement frame for placing optical lens, the upper portion of installation placement frame is provided with the gas filling assembly installed in the top of vacuum container;The lower portion of installation placement frame is provided with the vacuum air extraction system installed in the bottom of vacuum container.

[0008] The utility model places optical lens on installation placement frame, carries out vacuumizing to the inside of vacuum container by vacuum air extraction system, then fills nitrogen into the inside of vacuum container by gas filling assembly, realizes nitrogen replacement of gas in the inside of optical lens by the glue injection hole or sealing port of optical lens, reaches the purpose of nitrogen filling protection of optical lens, guarantees the dryness and stability in the inside of optical lens.

[0009] Further, the installation placement frame comprises a support frame installed at the bottom of the vacuum container and a placement frame installed on the support frame; a plurality of first through holes are formed on the two sides of the support frame respectively, and a plurality of second through holes are formed on the left and right sides of the placement frame respectively and match the positions of the first through holes; the support frame and the placement frame are connected by the first through holes and the second through holes through the insertion of the pin.

[0010] Further, the gas filling assembly comprises a plurality of first pipes uniformly arranged on the top of the vacuum container, the plurality of first pipes are in communication with a second pipe, and the second pipe is in communication with the nitrogen cylinder through a third pipe; a plurality of nitrogen filling nozzles are uniformly arranged on the first pipes; and the third pipe is provided with a filling valve.

[0011] Further, the vacuum air extraction system comprises a vacuum pump, and the vacuum pump is in communication with the gas outlet hole at the bottom of the vacuum container through a fourth pipe; and the fourth pipe is provided with a vacuum valve.

[0012] Further, the top of the vacuum container is provided with a pressure measuring instrument.

[0013] Further, one side of the vacuum container is provided with a balance valve.

[0014] Further, one side of the vacuum container is provided with a sealing door.

[0015] The utility model discloses a kind of dryers in the process of optical lens assembly, its beneficial effects are:

[0016] The utility model places optical lens on installation placement frame, carries out vacuumization to vacuum container inside using vacuum air extraction system, and nitrogen is filled into the inside of vacuum container uniformly by gas filling assembly, to fill nitrogen on one side and extract vacuum, by the glue injection hole or sealing port of optical lens, residual dust is extracted by the nitrogen filled and the air flow of vacuum extraction, realize the cleanliness of optical lens in the process of filling nitrogen, carry out nitrogen protection to optical lens, guarantee the dry and stable of optical lens inside. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a structure schematic view of the utility model's a kind of dryers in the process of optical lens assembly.

[0018] Fig. 2 It is a structure schematic view of the utility model's gas filling assembly.

[0019] Wherein, 1, vacuum container;2, installation placing rack;21, support frame;22, placing rack;23, first through hole;24, second through hole;3, optical lens;4, gas inflation assembly;41, first pipeline;42, second pipeline;43, third pipeline;44, nitrogen cylinder;45, nitrogen filling nozzle;46, inflation valve;5, vacuum pumping system;51, vacuum pump;52, fourth pipeline;53, vacuum valve;6, pressure measuring instrument;7, balance valve;8, sealing door. DETAILED DESCRIPTION

[0020] The specific embodiments of the present application are described in order to facilitate the understanding of the present application for those skilled in the art, but it should be clear that the present application is not limited to the scope of the specific embodiments, for those skilled in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the appended claims, these changes are obvious, all the utility model creations using the concept of the present application are within the scope of protection.

[0021] REFERENCE Figs. 1-2 The structure of the drying device for the optical lens assembly process is shown in the embodiment, and the purpose is to solve the problem that the conventional optical lens does not reserve the inflation interface and cannot be protected by nitrogen inflation. The specific structure in the embodiment will be described in detail below.

[0022] A drying device for optical lens assembly process comprises a vacuum container 1.

[0023] The vacuum container 1 can adopt a rectangular structure or a cylindrical structure, and the embodiment adopts a rectangular structure made of metal stainless steel, which is convenient for internal cleaning. The inner surface of the vacuum container 1 is polished, and the vacuum container 1 of the rectangular structure is provided with a sealing door 8 on one side. The sealing door 8 is sealed by a sealing ring, so that the optical lens 3 is placed on the installation placing rack 2 through the sealing door 8.

[0024] Specifically, the installation placing rack 2 is arranged at the bottom of the vacuum container 1, and the gas inflation assembly 4 is arranged on the top of the vacuum container 1 above the installation placing rack 2. The gas inflation assembly 4 is used to inflate nitrogen into the vacuum container 1. The vacuum pumping system 5 is arranged on the bottom of the vacuum container 1 below the installation placing rack 2, and the vacuum pumping system 5 is used to perform vacuum pumping operation on the vacuum container 1.

[0025] Specifically, the mounting rack 2 includes a support rack 21 mounted on the bottom of the vacuum container 1 and a placement rack 22 mounted on the support rack 21; multiple rows of first through holes 23 are respectively opened on both sides of the support rack 21, and second through holes 24 that match the positions of a row of first through holes 23 are respectively opened on the left and right sides of the placement rack 22, and the support rack 21 and the placement rack 22 are connected by a pin passing through the first through holes 23 and the second through holes 24.

[0026] In this embodiment, the support frame 21 and the placement frame 22 are both inverted U-shaped, and multiple rows of first through holes 23 are respectively provided on the left and right sides of the support frame 21. The number of first through holes 23 in each row can be set as needed. In this embodiment, the number is two, and a total of five rows are provided. Thus, the five rows of first through holes 23 are connected by pins through the second through holes 24 on the placement frame 22, and the height of the placement frame 22 can be adjusted.

[0027] Specifically, the gas inflation component 4 includes a plurality of first pipes 41 evenly distributed on the top of the vacuum container 1, and the plurality of first pipes 41 are connected to the second pipe 42, and the second pipe 42 is connected to the nitrogen bottle 44 through the third pipe 43; a plurality of nitrogen filling nozzles 45 are evenly arranged on the first pipe 41; and an inflation valve 46 is provided on the third pipe 43.

[0028] In this embodiment, a plurality of first pipes 41 are evenly arranged on the top of the vacuum container 1, and a plurality of nitrogen filling nozzles 45 are evenly arranged on the first pipes 41, so that nitrogen is evenly filled into the vacuum container 1, thereby preventing uneven airflow from driving fine dust in the vacuum container 1 into the optical lens 3. At the same time, the gas flow entering the vacuum container 1 can be adjusted by the filling valve 46.

[0029] Specifically, the vacuum exhaust system 5 includes a vacuum pump 51, which is connected to the air outlet at the bottom of the vacuum container 1 through a fourth pipe 52; a vacuum valve 53 is provided on the fourth pipe 52, and the vacuum pump 51 is connected to the outdoor environment.

[0030] In this embodiment, the vacuum pump 51 adopts an existing oil-free vacuum pump, which can achieve a vacuum degree of not less than 10 Pa. In order to achieve a better nitrogen filling effect inside the lens, the vacuum pump 51 can also use a molecular pump to evacuate the vacuum to achieve 10 -2 The vacuum degree is in the order of Pa. An oil-free vacuum pump is selected to avoid accidental power failure during the vacuuming process, which may cause air backflow and contamination of the optical lens 3.

[0031] At the same time, in order to avoid excessive pressure inside and outside the optical lens 3 due to excessive pumping speed, which may cause damage, the pressure drop rate can be achieved by controlling the opening of the vacuum valve 53.

[0032] Specifically, a pressure measuring instrument 6 is provided on the top of the vacuum container 1 .

[0033] In this embodiment, the pressure measuring instrument 6 includes a pressure transmitter and a vacuum gauge to measure the pressure inside the vacuum container 1. The measurement range of the pressure transmitter should meet 500Pa-0.2MPa. The vacuum gauge should meet 1Pa-100kPa. In order to adapt to higher vacuum degree, a composite vacuum gauge should be selected to realize 10 -2 Pa order of magnitude vacuum measurement.

[0034] Specifically, the vacuum container 1 is provided with a balance valve 7 on one side.

[0035] In this embodiment, the balance valve 7 can realize the internal and external balance of the vacuum container 1 after the nitrogen filling is completed. Through the balance valve 7, the internal and external pressure balance of the vacuum container 1 is realized, so that the sealing door 8 is opened smoothly and safely.

[0036] The working principle of the drying device used in the optical lens assembly process is:

[0037] In practical application, the present application refers to Figs. 1-2 Before starting work, the inside of the vacuum container 1 and the installation and placement rack 2 are cleaned, and the installation and placement rack 2 is adjusted so that the optical lens 3 placed on the installation and placement rack 2 is close to the nitrogen filling nozzle 45, avoiding dust from being brought into the inside of the optical lens 3 by air flow.

[0038] Then, the sealing door 8 is closed, the vacuum pump 51 is started, the vacuum valve 53 is opened, and the vacuum container 1 is subjected to vacuumizing operation. At this time, the air in the optical lens 3 is extracted through the glue injection hole or the screw hole. When the pressure is less than 10Pa or lower vacuum degree, timing is started.

[0039] After a period of time, the pressure in the optical lens 3 reaches a higher vacuum degree. Then the nitrogen filling valve 46 is controlled to be opened, nitrogen gas is rushed into the vacuum container 1, flows uniformly through the surface of the optical lens 3 through the nitrogen filling nozzle 45, and then is extracted through the lower vacuumizing fourth pipeline 52. At this time, if dust is brought up by air flow, it can be continuously taken away by vacuumizing.

[0040] After two minutes of filling, the vacuum valve 53 and the vacuum pump 51 are closed. At this time, nitrogen gas continues to rush into the vacuum container 1, and when the filling pressure rises to slightly greater than one atmospheric pressure, the filling valve 46 is closed. After the nitrogen filling is completed, a period of time is kept to make the internal pressure of the optical lens 3 and the pressure in the vacuum container 1 reach balance.

[0041] The manual opening balance valve 7, after pressure balance, open the vacuum container 1 seal door 8, take out the optical lens 3. At this time because the optical lens 3 glue injection hole or seal mouth is small, only the internal nitrogen will flow out because of the pressure greater than the external pressure, the external air will not enter the lens, the air exchange is very slow after pressure balance. At this time, as soon as possible to the injection hole injection or to the seal mouth using sealant seal, that is, the optical lens 3 can be sealed. After sealing, the optical lens 3 is placed in the normal temperature environment until the glue solidification.

[0042] Although the specific embodiments of the utility model are described in detail in combination with the drawings, it should not be understood as limiting the protection scope of the patent. Various modifications and changes made by those skilled in the art within the scope described in the claims are still within the protection scope of the patent.

Claims

1. A drying apparatus for use in an optical lens assembly process, characterized by: The vacuum container (1) comprises a supporting frame (21) and a placing frame (22) installed on the supporting frame (21). The bottom of the vacuum container (1) is provided with a mounting placing frame (2) for placing an optical lens (3); the upper portion of the mounting placing frame (2) is provided with a gas filling assembly (4) mounted on the top of the vacuum container (1); the lower portion of the mounting placing frame (2) is provided with a vacuum pumping system (5) mounted on the bottom of the vacuum container (1).

2. The drying apparatus for use in optical lens assembly process according to claim 1, wherein: The mounting placing frame (2) comprises a supporting frame (21) mounted on the bottom of the vacuum container (1) and a placing frame (22) mounted on the supporting frame (21). The two sides of the supporting frame (21) are respectively provided with multiple rows of first through holes (23), and the left and right sides of the placing frame (22) are respectively provided with second through holes (24) matched with the positions of one row of the first through holes (23); the supporting frame (21) and the placing frame (22) are connected by inserting pins through the first through holes (23) and the second through holes (24).

3. The drying apparatus for use in optical lens assembly process according to claim 1, wherein: The gas filling assembly (4) comprises multiple first pipes (41) uniformly arranged on the top of the vacuum container (1), the multiple first pipes (41) are all in communication with a second pipe (42), and the second pipe (42) is in communication with a nitrogen cylinder (44) through a third pipe (43). Multiple nitrogen filling nozzles (45) are uniformly arranged on the first pipes (41); and a filling valve (46) is arranged on the third pipe (43).

4. The drying apparatus for use in optical lens assembly process according to claim 1, wherein: The vacuum pumping system (5) comprises a vacuum pump (51), the vacuum pump (51) is in communication with the gas outlet hole at the bottom of the vacuum container (1) through a fourth pipe (52), and a vacuum valve (53) is arranged on the fourth pipe (52).

5. The drying apparatus for use in optical lens assembly process according to claim 1, wherein: The top of the vacuum container (1) is provided with a pressure measuring instrument (6).

6. The drying apparatus for use in optical lens assembly process according to claim 1, wherein: One side of the vacuum container (1) is provided with a balance valve (7).

7. The drying apparatus for use in optical lens assembly process according to claim 1, wherein: One side of the vacuum container (1) is provided with a sealing door (8).

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