Liquid flash optical fiber panel and liquid filling method and device of capillary tube array

Abstract

The invention provides a liquid flash optical fiber panel and a liquid filling method and device of a capillary tube array. The liquid filling method comprises the following steps: degassing: exhausting the capillary tube array and the liquid in a closed space; liquid is injected, wherein the liquid enters capillary tubes of the capillary tube array under the wriggling effect; the capillary tube array is heated, liquid in the capillary tubes is heated and expanded, and the liquid is extruded to the areas, not filled with the liquid, in the capillary tubes; stopping heating; and secondary liquid injection: enabling the liquid to enter the capillary tubes of the capillary tube array under the wriggling effect again. The technical problem to be solved is how to fill liquid into capillary tubes of a capillary tube array, so that the capillary tube array is particularly suitable for liquid filling of capillary tubes with various length-diameter ratios, and the filled capillary tube array is low in blind hole rate and high in filling purity, so that the capillary tube array is more practical.

Description

Technical Field

[0001] The invention relates to the technical field of optoelectronic material manufacturing, and in particular to a liquid scintillator optical fiber panel, a liquid filling method and a device for a capillary array. Background Art

[0002] The liquid scintillator fiber optic panel is a fast neutron detection device, which is mainly composed of a liquid scintillator (referred to as "liquid scintillator") and a capillary array. The liquid scintillator is filled in the capillary array. The refractive index of the inner wall of the capillary is lower than that of the liquid scintillator. The two ends of the capillary array are covered with lenses or fiber optic panels to encapsulate the liquid scintillator. The detection principle is: fast neutrons bombard the hydrogen nuclei in the liquid scintillator, stimulating the liquid scintillator to emit visible fluorescence. Part of the visible fluorescence is totally reflected on the inner wall of the capillary, and is transmitted from the output end of the liquid scintillator fiber optic panel to be received by photosensitive elements such as CCD or CMOS, thereby realizing the detection of fast neutrons. In the preparation of the liquid scintillator fiber optic panel, the filling of the liquid scintillator is crucial. The impurities remaining in the tube during the capillary processing and the gas introduced into the capillary during the liquid scintillator filling process will cause some capillaries to be unable to be completely filled with liquid scintillator, or the luminescence performance of the liquid scintillator filled in the capillary will deteriorate rapidly.

[0003] The commonly used liquid scintillator filling method in the prior art is to use the siphon effect of the capillary to fill the liquid scintillator. However, this method has two limitations: first, the siphon height under the capillary effect is limited, and it is not suitable for filling capillaries with a very large aspect ratio (i.e., the ratio of the capillary length to the capillary aperture); second, there are usually processing debris remaining in the capillary array with a large aspect ratio, which is difficult to clean up, and some capillary channels are even blocked, and the blocked capillaries cannot be filled with liquid scintillator through the siphon effect of the capillary, resulting in many blind spots in the filled liquid scintillator, such as the attached Figure 2 As shown; alternatively, after the liquid scintillator is filled, the impurities present in the capillary will also affect the purity of the liquid scintillator. Summary of the invention

[0004] The main purpose of the present invention is to provide a liquid scintillator optical fiber panel, a liquid filling method and device for a capillary array. The technical problem to be solved is how to fill liquid into the capillaries of the capillary array, so that it is particularly suitable for liquid filling of capillaries with various aspect ratios, and the capillary array after filling has a low blind hole rate and high filling purity. The blind hole rate of the liquid scintillator optical fiber panel prepared thereby is ≤1‰, thereby being more suitable for practical use.

[0005] The purpose of the present invention and the technical problem to be solved are achieved by adopting the following technical solutions. According to a liquid filling method of a capillary array proposed by the present invention, the method comprises the following steps:

[0006] Degassing: Exhaust the capillary array and liquid in a confined space;

[0007] Liquid injection: the liquid enters the capillaries of the capillary array under the action of peristalsis;

[0008] Eliminating the blind area: placing the capillary array in a closed space, heating the capillary array, and causing the liquid in the capillaries to expand due to the heat and be squeezed to the area in the capillaries that is not filled with liquid; stopping the heating;

[0009] Secondary liquid injection: liquid again enters the capillaries of the capillary array under the action of peristalsis.

[0010] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0011] Preferably, in the aforementioned liquid filling method of the capillary array, the degassing is to evacuate the enclosed space, and control the absolute pressure in the enclosed space to be ≤10 -2 Pa; before the liquid injection, it also includes a step of introducing an inert gas into the enclosed space.

[0012] Preferably, in the aforementioned liquid filling method for a capillary array, the heating temperature is 5 to 20° C. higher than the filling temperature, and the heating temperature is maintained for 10 to 30 minutes.

[0013] Preferably, in the aforementioned method for filling a capillary array with liquid, the liquid injection is performed by placing the capillary array in a vertical direction with the capillary axis, the liquid enters the capillary from the lower end of the capillary, flows through the capillary, and overflows from the upper end of the capillary; the overflowed liquid flows back into the liquid container.

[0014] Preferably, the aforementioned method for filling a capillary array with liquid further comprises a step of filtering the liquid before the liquid enters the capillary.

[0015] The purpose of the present invention and the technical problem to be solved are achieved by adopting the following technical solutions. A liquid filling device for a capillary array proposed in the present invention comprises:

[0016] A degassing unit, used to remove gas from the liquid to be filled and the capillary array to be filled;

[0017] A liquid injection unit, used for allowing the liquid to be filled to enter the capillaries of the capillary array;

[0018] A heating unit is used to heat the liquid in the capillary array.

[0019] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0020] Preferably, in the aforementioned liquid filling device for the capillary array, the liquid filling unit comprises:

[0021] a pressure-resistant chamber including a first valve disposed at the bottom and a second valve disposed at the top;

[0022] A liquid container, comprising a third valve arranged on the top; the second valve and the third valve are connected via a hose;

[0023] The peristaltic pump comprises an input port and an output port; the input port is connected to the liquid container via a hose; the output port is connected to the first valve via a hose.

[0024] Preferably, in the aforementioned liquid filling device for the capillary array, a glass fiber sand core is provided at the bottom of the pressure-resistant chamber downstream of the first valve.

[0025] Preferably, in the aforementioned liquid filling device for the capillary array, the degassing unit comprises:

[0026] An operation box is used to form a closed space; the injection unit and the heating unit are both arranged inside the operation box;

[0027] The vacuum pump is arranged outside the operation box and connected to the operation box.

[0028] Preferably, in the aforementioned liquid filling device for the capillary array, the operation box is also provided with an interface for connecting to a gas source.

[0029] Preferably, in the aforementioned liquid filling device for the capillary array, the heating unit comprises a heating body; the heating body is arranged at the periphery of the pressure-resistant chamber.

[0030] The purpose of the present invention and the technical problem solved are achieved by adopting the following technical solutions: A liquid scintillator optical fiber panel proposed in the present invention comprises a capillary array; the capillaries constituting the capillary array have a pore size of ≤150 μm, an aspect ratio of ≥600, and a blind hole rate of ≤1‰.

[0031] By means of the above technical solution, the present invention provides a liquid scintillator optical fiber panel, a liquid filling method and a device for a capillary array, which have at least the following advantages:

[0032] The liquid filling method of the capillary array of the present invention can remove a large amount of gas adsorbed in the capillary structure and gas that may be dissolved in the liquid scintillator during preparation and storage by degassing the capillary array and the liquid in a closed atmosphere. Generally, if air, especially oxygen, is mixed in the liquid scintillator filled in the liquid scintillator capillary array, the luminescent performance of the liquid scintillator will be greatly weakened, resulting in a reduction in product performance; therefore, the technical solution of the present invention stipulates that before the liquid scintillator is filled, the gas in the system, the capillary, and the liquid scintillator is first removed, which greatly reduces the influence of the gas on the luminescent performance of the liquid scintillator and improves the performance of the product; at the same time, the technical solution of the present invention injects liquid into the capillaries of the capillary array by the peristaltic action of the liquid, which can avoid the defect of the traditional technology of filling the capillaries with liquid by siphon action, so that the filling liquid is no longer limited by the aspect ratio of the capillary, so that the liquid filling method of the present invention can be applied to the liquid filling of capillary arrays with various aspect ratios; and, the technical solution of the present invention is provided with a step of eliminating blind spots, by heating the capillary array, so that the liquid in the capillary expands due to the temperature, and the liquid The expansion ratio is greater than the expansion ratio of the glass, so that the liquid in the capillary can be squeezed to the area of ​​the capillary that is not filled with liquid under the action of thermal expansion. On the one hand, the blind area of ​​liquid injection in the capillary can be eliminated, and on the other hand, the pressure generated by the thermal expansion of the liquid can be used to impact the blind hole in the capillary, so that the blocked impurities are dispersed and the capillary is connected; then the heating is stopped, and the capillary glass and liquid shrink at this time, and the liquid is injected again into the blank area caused by the liquid shrinkage through the creeping action of the liquid; the present invention can better complete the liquid filling in the capillary through the combined action of the above steps, and there are fewer blind areas in the capillary after filling, and the blind hole rate of the liquid scintillator optical fiber panel made of the capillary array prepared by the liquid filling method of the technical solution of the present invention is ≤1‰; and, because the blockage in the capillary is dispersed by the impact force of the heated liquid and flows out of the capillary with the overflowing liquid, the purity of the liquid in the capillary is improved.

[0033] Furthermore, the present invention can block impurities in the capillary array and the filling system by arranging a glass fiber sand core to filter the liquid before the liquid enters the capillary, and prevent the impurities from entering the capillary array again, thereby improving the purity of the liquid in the capillary.

[0034] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of a liquid scintillation filling device of a capillary array of the present invention;

[0036] Figure 2 It is a capillary array diagram of a prior art that uses capillary siphoning to fill liquid scintillation;

[0037] Figure 3 The present invention is a diagram of a capillary array for filling liquid scintillator using the capillary array liquid scintillator filling device of the present invention. DETAILED DESCRIPTION

[0038] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the specific implementation, structure, features and effects of a liquid filling method and device for a liquid scintillator optical fiber panel and a capillary array proposed by the present invention in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0039] The present invention provides a method for filling liquid in a capillary array, which comprises the following steps: placing a capillary array to be filled with liquid and a liquid for filling the capillary in a closed space, and then evacuating the closed space by a vacuum pump, so that a large amount of gas adsorbed by the capillary array placed in the closed space and gas dissolved in the liquid during liquid preparation and storage are discharged; then, the degassed liquid is input into the capillaries of the capillary array from which gas is discharged by a peristaltic pump; in this step, the liquid preferentially enters the capillaries that are connected, while it is difficult to fill the capillaries that are not so smooth with liquid, resulting in the possibility of a blind area where liquid cannot be filled; in order to improve the filling rate of liquid filling in the capillary and reduce the liquid blind area, the present invention particularly provides a step of eliminating the blind area, specifically: placing the capillary array in a closed space, heating the capillary array for filling liquid, and making the capillary array The liquid filled in the capillary expands when heated, and the impact force of the liquid expansion will impact the blockage in the capillary that is not smooth, so that the capillary becomes smooth. On the one hand, it can reduce the impurity content in the capillary and improve the purity of the liquid. On the other hand, the heated liquid can be squeezed into the area of ​​the capillary that was not filled with liquid before, so as to improve the filling rate of the liquid in the capillary and reduce the filling blind area. The heating is stopped to restore the temperature of the liquid in the capillary to the filling temperature. Since part of the liquid is injected into the blind area that was not filled with liquid before, some capillaries will lack liquid. At this time, the capillary array is injected with liquid for the second time, and the liquid enters the capillary of the capillary array again under the action of peristalsis, and the capillary that appears to lack liquid is filled with liquid, thereby improving the capillary liquid filling rate of the capillary array, greatly reducing the filling blind area of ​​the capillary, and also improving the purity of the liquid in the capillary.

[0040] In order to ensure that the capillary array of the liquid to be filled and the residual gas in the liquid to be filled into the capillary will not affect the product quality, the present invention preferably degassing by evacuating the closed space; further preferably, the absolute pressure in the closed space is controlled to be ≤10 -2 Pa, the present invention controls the vacuum degree of vacuum pumping and controls the vacuum degree to be between 10 -2 Pa for more than 0.5 h, so that the gas adsorbed in the capillary array and the liquid dissolved in the liquid can be discharged as much as possible, reducing the impact of gas on the quality of liquid scintillator fiber optic panel products.

[0041] In order to reduce the resistance of liquid creeping into the capillary and ensure that the liquid can smoothly enter the capillary, the present invention preferably introduces an inert gas into the evacuated enclosed space before injecting the liquid. At this time, the inert gas will be adsorbed in the capillary; the adsorbed inert gas can also prevent the liquid scintillator filled in the capillary from being oxidized and reducing the luminescence performance of the liquid scintillator, thereby ensuring the performance of the liquid scintillator fiber optic panel.

[0042] In order to achieve a high filling rate of the liquid filled into the capillary, the preferred liquid injection method of the present invention is to place the capillary array in a direction vertical to the capillary axis, that is, the capillary is placed in a vertical direction, and the liquid enters the capillary from the lower end of the capillary, and after flowing through the capillary, the liquid overflows from the upper end of the capillary, so that the liquid flows through the entire capillary during the filling process, and the phenomenon of lack of liquid filling in the capillary layout will not occur, thereby ensuring the filling effect of the liquid; the overflowed liquid will flow back to the container containing the liquid along the pipeline; the impurities dispersed in the capillary also circulate with the overflowed liquid and will not be retained in the capillary array, thereby improving the purity of the liquid.

[0043] During the capillary filling process, in order to prevent the gas discharged from the capillary from entering the liquid and affecting the quality of the liquid, the gas discharge pipeline can be separated from the liquid container first. When the gas in the capillary is completely discharged and the liquid overflows from the pipeline, the gas discharge / liquid overflow pipeline can be inserted into the liquid container. This can avoid contaminating the filling equipment and avoiding liquid waste. The liquid is circulated and filled in the system. During the capillary filling process, considering that the liquid filling speed may be inconsistent due to the inconsistency of the pore diameters of some capillaries, in order to fully fill the capillary, the present invention controls the circulation filling time to ≥3h so that the liquid fills the through channel as much as possible.

[0044] The present invention preferably eliminates the blind area at a heating temperature that is 5 to 20°C higher than the filling temperature, and maintains the heating temperature for 10 to 30 minutes. The liquid is heated in a closed, confined space and impacts the blind hole area under expansion pressure. For capillaries with a large aspect ratio, individual capillaries are very likely to be blocked by impurities during processing. During the filling process, the liquid will preferentially choose unblocked capillaries for filling, resulting in a small amount of liquid in the blocked capillaries. The internal volume of the pressure-resistant chamber is limited. When heated, the liquid in the filled capillary will impact the blind hole under the heat expansion, and the impurities in the blind hole will be flushed open under the action of pressure, thereby unblocking the blockage. If the heating temperature is too low or the time is too short, the pressure generated by the expansion of the liquid is small, and the impact on the impurities in the blind hole is too small. If the heating temperature is too high or the time is too long, the pressure-resistant chamber may be damaged or leak.

[0045] Since small bubbles in the injected liquid are difficult to be removed at one time, repeated impacts over a long period of time are required to achieve a better bubble removal effect. Therefore, in the technical solution of the present invention, it is preferred to control the cycle filling time of the capillary secondary injection process to be ≥3h, so that the remaining gas in the capillary that is not penetrated before heating can be completely discharged from the capillary, and the liquid flash fills the through channel as much as possible.

[0046] For capillaries with a large aspect ratio, the capillaries often contain more or less impurities that are difficult to remove during the processing process, resulting in some impurities flowing with the liquid scintillation during the liquid circulation filling process; in order to prevent impurities in the liquid scintillation liquid from entering the capillaries and preventing the impurities from affecting the quality of the capillary array, the present invention preferably filters the liquid before the liquid enters the capillary to filter out impurities that may be contained in the liquid and prevent them from entering the capillary with the liquid.

[0047] The present invention also provides a liquid filling device for a capillary array, comprising:

[0048] A degassing unit, used to remove gas from the liquid to be filled and the capillary array to be filled;

[0049] A liquid injection unit, used for allowing the liquid to be filled to enter the capillaries of the capillary array;

[0050] The heating unit is used to heat the liquid in the capillary array; the liquid in the capillary array expands under the heating action of the heating unit. Since the expansion rate of the liquid is greater than the expansion rate of the capillary, the force generated by the expansion of the liquid can flush out the impurities in the capillary blocked by the impurities, and the impurities are taken out of the capillary by the liquid as it moves from bottom to top.

[0051] In a specific embodiment of the present invention, as shown in the attached Figure 1As shown, the degassing unit includes an operation box 9 for forming a closed space; the injection unit and the heating unit are both arranged inside the operation box; the degassing unit also includes a vacuum pump 10; the vacuum pump is arranged on the outside of the operation box and connected to the operation box, and is used to evacuate the operation box before filling begins to exhaust the air in the operation box to avoid the influence of air on liquid flash filling.

[0052] In a specific embodiment of the present invention, as shown in the attached Figure 1 As shown, the operation box is also provided with an interface for connecting a gas source; the gas source may be a gas tank 11, which is used to introduce an inert gas into the operation box. On the one hand, the inert gas can prevent liquid flash oxidation, and on the other hand, the inert gas in the operation box also facilitates the pressure balance inside and outside the operation box, so that the operator can operate the operation box through gloves.

[0053] In a specific embodiment of the present invention, as shown in the attached Figure 1 As shown, the injection unit includes a pressure-resistant chamber 2 for placing a capillary array 1 to be filled; before filling, the capillary array is first placed in the pressure-resistant chamber with its axis vertical, and then filling begins; the pressure-resistant chamber includes a first valve C arranged at the bottom and a second valve A arranged at the top; the injection unit also includes a liquid container 5 for containing a liquid 6 to be filled; the liquid container includes a third valve B arranged at the top; the second valve A and the third valve B are connected by a hose 8; the pressure-resistant chamber can be connected to the liquid container through the hose, so that the liquid overflowing from the pressure-resistant chamber can be circulated into the liquid container, thereby avoiding equipment contamination caused by liquid leakage and also avoiding liquid loss; in the hose Before the liquid overflows, the hose is separated from the liquid container in order to prevent the gas discharged from the pressure-resistant chamber from entering the liquid and affecting the quality of the liquid flash; during the filling process, the operator visually inspects the fluid discharged from the hose, and immediately inserts the hose into the liquid container if liquid is found to overflow from the hose; the entire operation of the operator is performed outside the operating box using gloves; the injection unit also includes a peristaltic pump 7; the peristaltic pump includes an input port and an output port; the input port is connected to the liquid container through a hose; the output port is connected to the first valve C through a hose; from upstream to downstream, the liquid container, peristaltic pump, pressure-resistant chamber, hose, and liquid container are connected in series to form a liquid circulation loop for liquid flash filling.

[0054] In a specific embodiment of the present invention, as shown in the attached Figure 1 As shown, a glass fiber sand core 3 is arranged at the bottom of the pressure-resistant chamber downstream of the first valve; the end face of the capillary is similar to the structure of a filter, causing impurities to be concentrated and adsorbed at the lower end of the capillary; the present invention arranges a glass fiber sand core at the lower end of the pressure-resistant chamber, and controls the pore size of the sand core to be smaller than the pore size of the capillary, so as to prevent impurities from entering the capillary array again.

[0055] In a specific embodiment of the present invention, as shown in the attached Figure 1 As shown, the heating unit includes a heating body 4; the heating body is arranged at the periphery of the pressure-resistant chamber, and is used to heat the capillary array and liquid in the pressure-resistant chamber, so as to eliminate the filling blind area; the specific operation of eliminating the blind area is: turn off the peristaltic pump, close valves A and C, and make the pressure-resistant chamber in a sealed state. Turn on the heating body, keep the temperature of the capillary and the internal liquid at 5 to 20°C higher than the filling temperature for 10 to 30 minutes, and the liquid impacts the blind hole area under the pressure of thermal expansion. After the blind area is eliminated, turn off the heating body, open valves A and C, make the pressure-resistant chamber and the hose connected again, turn on the peristaltic pump, and circulate the liquid again, so that the blocked capillary is refilled with liquid under the liquid flash cycle to complete the filling.

[0056] The present invention also provides a liquid scintillator fiber panel, whose blind hole rate is ≤1‰. By filling the capillary array with the liquid filling device and liquid filling method of the present invention, the blind area of ​​the capillary can be effectively reduced, and the blind hole rate of the liquid scintillator fiber panel processed by the device and the method is very low, and the quality improvement is particularly obvious for the panel with a large aspect ratio of the capillary. Figure 2 and attached Figure 3 As shown, attached Figure 2 The capillary array diagram is not used for liquid filling using the technical solution of the present invention, and the capillary siphon effect of the prior art is used to fill the liquid flash. Figure 2 As can be seen from the figure, there are many unfilled capillaries 12 distributed therein; Figure 3 The capillary array of the liquid scintillator filling device of the capillary array of the present invention is filled with liquid scintillator, and the attached Figure 3 It can be seen that there are no unfilled capillaries distributed therein, that is, its blind hole rate is extremely low; after testing, its blind hole rate is ≤1‰.

[0057] The present invention will be further described below in conjunction with specific embodiments, but this should not be construed as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made to the present invention by technicians in this field based on the above-mentioned contents of the present invention still fall within the scope of protection of the present invention.

[0058] Example 1

[0059] This embodiment provides a method for filling a capillary array with liquid, wherein the capillary array to be filled has a pore size of 20 μm, a length of 100 mm, and a caliber of 50 mm; the liquid to be filled is a liquid scintillator, which is contained in a liquid container. The specific filling process is as follows:

[0060] By the attached Figure 1As shown, the capillary array is fixed in the pressure chamber, and a glass fiber sand core with a pore size of 3 μm is placed at the bottom of the pressure chamber. The hose connecting valves A and B is removed, and the vacuum pump is turned on to evacuate the closed operating box. The vacuum degree is controlled at 10 -2 The vacuum time is 1 hour, the purpose is to exhaust the air in the operation box. Fill the closed operation box with argon gas, connect the hose at valve A, turn on the peristaltic pump, and allow the liquid scintillator to enter the capillary array under the action of the peristaltic pump and fill it from bottom to top. The flow rate of the peristaltic pump is 10mL / min. When liquid scintillator flows out of the end of the hose near valve B, connect the valve B end of the hose to the liquid in the liquid container. The liquid scintillator is circulated and filled in the system for 3 hours. Turn off the peristaltic pump, close valves A and C, turn on the heating body, and increase the temperature of the capillary and the internal liquid scintillator by 8°C, and keep it for 10 minutes. Turn off the heating body to cool the capillary and the internal liquid scintillator. Open valves A and C, turn on the peristaltic pump, and circulate the liquid scintillator again for 3 hours, so that the unblocked capillary is filled under the liquid scintillator cycle.

[0061] The effect of liquid scintillation filling in capillaries was tested using an optical microscope. Figure 3 As shown, the blind hole rate is less than 1‰.

[0062] Embodiments 2 to 6

[0063] Same as in Example 1, specific parameter changes are shown in Table 1 below:

[0064] Table 1

[0065]

[0066] It can be seen from the test data of the above embodiments that the liquid scintillator filling of the capillary array by the method of the present invention has a good effect. In the case of a larger aspect ratio, such as in Example 1, when the aspect ratio is as high as 5000, the blind hole rate can still reach a level below 1‰.

[0067] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0068] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known structures and technologies are not shown in detail so as not to obscure the understanding of this description.

[0069] Similarly, it should be understood that in order to streamline the disclosure and aid in understanding one or more of the various application aspects, in the above description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the disclosed apparatus should not be interpreted as reflecting the following intention: the claimed application requires more features than the features explicitly recited in each claim. More specifically, as reflected in the claims below, the application aspects lie in less than all the features of the single embodiment disclosed above. Therefore, the claims following the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present application.

[0070] It will be appreciated by those skilled in the art that the components in the apparatus in the embodiment may be adaptively changed and arranged in one or more apparatuses different from the embodiment. The components in the embodiment may be combined into one component, and furthermore they may be divided into a plurality of subcomponents. All features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all components of any apparatus so disclosed may be combined in any combination, except that at least some of such features are mutually exclusive.

[0071] In addition, it will be appreciated by those skilled in the art that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and to form different embodiments. For example, in the claims below, any one of the claimed embodiments may be used in any combination. The various component embodiments of the present application may be implemented in hardware, or in combination thereof.

[0072] It should be noted that the above embodiments illustrate the present application rather than limit the present application, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation on the claims. The word "comprising" does not exclude the presence of parts or components that are not listed in the claims. The word "one" or "an" preceding a part or component does not exclude the presence of multiple such parts or components. The present application may be implemented with the aid of a device including several different parts. In a claim that lists several parts, several of these parts may be embodied by the same component item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names.

[0073] The technical features in the claims and / or the specification of the present invention may be combined, and the combination is not limited to the combination obtained by reference in the claims. The technical solution obtained by combining the technical features in the claims and / or the specification is also within the protection scope of the present invention.

[0074] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A method for filling a capillary array with liquid, characterized in that: It includes the following steps: Degassing: Exhaust the capillary array and liquid in a confined space; Liquid injection: the liquid enters the capillaries of the capillary array under the action of peristalsis; Eliminating the blind area: placing the capillary array in a closed space, heating the capillary array, and causing the liquid in the capillaries to expand due to the heat and be squeezed to the area in the capillaries that is not filled with liquid; stopping the heating; Secondary liquid injection: liquid again enters the capillaries of the capillary array under the action of peristalsis.

2. The liquid filling method according to claim 1, characterized in that: The degassing is to evacuate the enclosed space and control the absolute pressure in the enclosed space to be ≤10 -2 Pa; before the liquid injection, it also includes a step of introducing an inert gas into the enclosed space.

3. The liquid filling method according to claim 1, characterized in that: The liquid injection is to place the capillary array in a vertical direction with the capillary axis, and the liquid enters the capillary from the lower end of the capillary, flows through the capillary, and overflows from the upper end of the capillary; the overflowed liquid flows back into the liquid container.

4. The liquid filling method according to claim 1, characterized in that: The heating temperature is 5 to 20° C. higher than the filling temperature, and the heating temperature is maintained for 10 to 30 minutes.

5. The liquid filling method according to claim 1, characterized in that: The method further includes filtering the liquid before the liquid enters the capillary tube.

6. A liquid filling device for a capillary array, characterized in that: It includes: A degassing unit, used to remove gas from the liquid to be filled and the capillary array to be filled; A liquid injection unit, used for allowing the liquid to be filled to enter the capillaries of the capillary array; A heating unit is used to heat the liquid in the capillary array.

7. The liquid filling device according to claim 6, characterized in that: The liquid injection unit comprises: a pressure-resistant chamber including a first valve disposed at the bottom and a second valve disposed at the top; A liquid container, comprising a third valve arranged on the top; the second valve and the third valve are connected via a hose; The peristaltic pump comprises an input port and an output port; the input port is connected to the liquid container via a hose; the output port is connected to the first valve via a hose.

8. The liquid filling device according to claim 7, characterized in that: A glass fiber sand core is arranged downstream of the first valve and at the bottom of the pressure-resistant chamber.

9. The liquid filling device according to claim 6, characterized in that: The degassing unit comprises: An operation box is used to form a closed space; the injection unit and the heating unit are both arranged inside the operation box; The vacuum pump is arranged outside the operation box and connected to the operation box.

10. The liquid filling device according to claim 9, characterized in that: The operation box is also provided with an interface for connecting to an air source.

11. The liquid filling device according to claim 7, characterized in that: The heating unit comprises a heating body; the heating body is arranged at the periphery of the pressure-resistant chamber.

12. A liquid scintillator optical fiber panel, characterized in that: It includes a capillary array; The capillaries constituting the capillary array have a pore diameter of ≤150 μm, an aspect ratio of ≥600, and a blind hole rate of ≤1‰.

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