Liquid scintillator fiber panel, liquid filling method and device for capillary array

Abstract

The present invention provides a liquid scintillating optical fiber panel and a liquid filling method and device for a capillary array. The liquid filling method comprises the following steps: degassing: exhausting the capillary array and liquid in a closed space; liquid injection: liquid enters the capillaries of the capillary array under the action of peristalsis; eliminating blind areas: heating the capillary array, the liquid in the capillaries expands due to the heat and is squeezed into the area of ​​the capillaries not filled with liquid; stopping heating; secondary liquid injection: liquid enters the capillaries of the capillary array again under the action of peristalsis. The technical problem to be solved is how to fill liquid into the capillaries of the capillary array, making it 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, thus being more suitable for practical use.

Description

Technical Field

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

[0002] The liquid scintillator fiber optic panel is a fast neutron detection device, mainly composed of a liquid scintillator (abbreviated 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, exciting the liquid scintillator to emit visible fluorescence. Part of the visible fluorescence undergoes total reflection 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 liquid scintillator fiber optic panels, the filling of liquid scintillator is crucial. Impurities remaining in the tube during the capillary processing and gases 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 tube to fill the liquid scintillator. However, this method has two limitations: first, the siphon height under the capillary action is limited, which is not suitable for filling capillaries with a very large aspect ratio (i.e., the ratio of the capillary tube length to the capillary tube aperture); second, the capillary array with a large aspect ratio usually contains processing debris, which is difficult to clean. Some capillary channels are even blocked, and the blocked capillaries cannot be filled with liquid scintillator through the capillary siphon effect, resulting in many blind spots in the filled liquid scintillator, such as the attached Figure 2 Alternatively, after the liquid scintillator is filled, the impurities 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 fiber optic panel and 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. The blind hole rate of the capillary array after filling is low and the filling purity is high. The blind hole rate of the liquid scintillator fiber optic panel prepared by the method is ≤1‰, making it more suitable for practical use.

[0005] The purpose of the present invention and the technical problem solved are achieved by adopting the following technical solutions. According to the present invention, a liquid filling method for a capillary array is proposed, which includes 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 blind spots: placing the capillary array in a closed space, heating the capillary array, causing the liquid in the capillaries to expand due to the heat and be squeezed into the area of ​​the capillaries that is not filled with liquid; then stopping heating;

[0009] Secondary liquid injection: the 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 for 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 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 filling is performed by placing the capillary array with the capillary axis in a vertical direction, 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 includes a step of filtering the liquid before the liquid enters the capillaries.

[0015] The purpose of the present invention and the technical problem solved are achieved by adopting the following technical solutions. According to the present invention, a liquid filling device for a capillary array is proposed, which 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 injection unit comprises:

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

[0022] A liquid container comprising a third valve disposed 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; and 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 further 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 includes a heating body; the heating body is arranged at the periphery of the pressure-resistant chamber.

[0030] The objectives of the present invention and the technical problems solved therein are achieved by adopting the following technical solutions: A liquid scintillator fiber panel according to the present invention comprises 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 ratio of ≤1‰.

[0031] By means of the above technical solution, the present invention provides a liquid scintillating optical fiber panel, a liquid filling method and 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 liquid in a closed atmosphere. Generally, if the liquid scintillator filled in the liquid scintillator capillary array contains air, especially oxygen, the luminescence 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 the gas in the system, the capillary, and the liquid scintillator must be removed before the liquid scintillator is filled, which greatly reduces the influence of the gas on the luminescence 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 avoids 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, thereby making the liquid filling method of the present invention applicable to the liquid filling of capillary arrays with various aspect ratios. In addition, 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 under the action of 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 contraction of the liquid through the peristaltic 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 the blind area in the capillary after filling is small. The blind hole rate of the liquid scintillator 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 provides a glass fiber sand core to filter the liquid before the liquid enters the capillary tube, thereby blocking impurities in the capillary array and the filling system and preventing the impurities from re-entering the capillary array, thereby improving the purity of the liquid in the capillary tube.

[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 with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of the structure of the liquid scintillation filling device of the capillary array of the present invention;

[0036] Figure 2 This is a diagram of a capillary array for filling liquid scintillation using capillary siphoning in the prior art;

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

[0038] To further illustrate the technical means and effectiveness of the present invention in achieving its intended objectives, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effectiveness of a liquid-filling method and apparatus for a liquid scintillating fiber optic panel and capillary array according to the present invention. In the following description, different references to "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[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 liquid for filling the capillaries in a closed space, then evacuating the closed space by a vacuum pump so that a large amount of gas adsorbed by the capillary array in the closed space and gas dissolved in the liquid during liquid preparation and storage are discharged; then, by a peristaltic pump, inputting the degassed liquid into the capillaries of the degassed capillary array; in this step, the liquid preferentially enters the capillaries that are connected, while it is difficult to fill the capillaries that are not well connected, resulting in the possibility of blind spots where liquid cannot be filled; in order to improve the filling rate of liquid filling in the capillaries and reduce the liquid blind spots, the present invention particularly provides a step for eliminating the blind spots, specifically: placing the capillary array in the closed space, heating the capillary array for filling the liquid, so that the capillary array The liquid filled in the capillaries expands due to heat. Under the impact force of the liquid expansion, the blockages in the capillaries that are not smooth are dislodged, making the capillaries smooth. On the one hand, this can reduce the impurity content in the capillaries and improve the purity of the liquid. On the other hand, it can squeeze the heated liquid into the areas of the capillaries that were not previously filled with liquid, thereby increasing the filling rate of the liquid in the capillaries and reducing the filling blind spots. Heating is stopped to allow the temperature of the liquid in the capillaries to return to the filling temperature. Since part of the liquid is injected into the blind spots that were not previously filled with liquid, some capillaries may appear to be lacking liquid. At this time, the capillary array is injected with liquid a second time. The liquid enters the capillaries of the capillary array again under the action of peristalsis, filling the capillaries that appeared to be lacking liquid with liquid, thereby improving the capillary liquid filling rate of the capillary array, greatly reducing the filling blind spots of the capillaries, and also improving the purity of the liquid in the capillaries.

[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 vacuuming the enclosed space; further preferably, the absolute pressure in the enclosed 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 0.5h, 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 the gas on the quality of the liquid scintillator fiber optic panel product.

[0041] In order to reduce the resistance of the liquid to creeping into the capillary and ensure that the liquid can enter the capillary smoothly, the present invention preferably introduces an inert gas into the vacuumed 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 luminous performance of the liquid scintillator, thereby ensuring the performance of the liquid scintillator fiber optic panel.

[0042] To achieve a high liquid filling rate in the capillaries, the present invention preferably places the capillary array with the capillary axis vertically, that is, the capillaries are placed in a vertical direction, and the liquid enters the capillaries from the lower ends. After flowing through the capillaries, the liquid overflows from the upper ends of the capillaries. This ensures 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 liquid filling effect; the overflowed liquid will flow back to the container holding the liquid along the pipeline; impurities dispersed in the capillaries also circulate with the overflowing 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. After the gas in the capillary is completely discharged and liquid overflows from the pipeline, the gas discharge / liquid overflow pipeline can be inserted into the liquid container. This can avoid contamination of the filling equipment and waste of liquid. 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 ensure that the capillary is fully filled, the present invention controls the cyclic filling time to be ≥3h so that the liquid flash 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. The temperature is maintained at 10 to 30 minutes, and the liquid is heated in a closed, confined space, and impacts the blind hole area under the expansion pressure. For capillaries with a large aspect ratio, individual capillaries are very likely to be clogged 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 due to thermal 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 will be too small, and the impact on the impurities in the blind hole will be 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 in one go, 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 can fill the penetrated channel as much as possible.

[0046] For capillaries with a large aspect ratio, impurities often remain in the capillaries during processing, which are difficult to remove. As a result, some impurities flow with the liquid scintillation during the liquid circulation filling process. To prevent impurities in the liquid scintillation liquid from entering the capillaries and affecting the quality of the capillary array, the present invention preferably filters the liquid before it enters the capillaries to filter out impurities that may be contained in the liquid and prevent them from entering the capillaries 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 capillaries, the force generated by the liquid expansion can flush out the impurities in the capillaries blocked by impurities. The impurities are carried out of the capillaries 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 vacuum the operation box before filling begins to expel the air in the operation box to avoid the air affecting the liquid flash filling.

[0052] In a specific embodiment of the present invention, as shown in the attached Figure 1 As shown, the operating box is also provided with an interface for connecting to a gas source; the gas source can be a gas tank 11, which is used to introduce inert gas into the operating box. On the one hand, the inert gas can prevent liquid flash oxidation, and on the other hand, the inert gas flowing through the operating box also facilitates pressure balance inside and outside the operating box, allowing the operator to operate the operating 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 the capillary array 1 to be filled; before filling, the capillary array is first placed in the pressure-resistant chamber with its axis vertically aligned, 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 holding the 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 and the liquid container can be connected together through the hose, so that the liquid overflowing from the pressure-resistant chamber can be circulated into the liquid container, 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 if liquid is found to overflow from the hose, the operator immediately inserts the hose into the liquid container; 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 provided 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 provides 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 re-entering the capillary array.

[0055] In a specific embodiment of the present invention, as shown in the attached Figure 1 As shown, the heating unit includes a heater 4, which is disposed on the periphery of the pressure-resistant chamber and is used to heat the capillary array and liquid within the pressure-resistant chamber, thereby eliminating the filling blind spot. The specific operation to eliminate the blind spot is as follows: turn off the peristaltic pump and close valves A and C to seal the pressure-resistant chamber. Turn on the heater to maintain the temperature of the capillary and the internal liquid at 5 to 20°C above the filling temperature for 10 to 30 minutes. The liquid impacts the blind hole area under the pressure of thermal expansion. After the blind spot is eliminated, turn off the heater, open valves A and C to reconnect the pressure-resistant chamber and the hose, turn on the peristaltic pump, and circulate the liquid again, so that the unblocked capillary is refilled with liquid under the liquid flash cycle, completing the filling.

[0056] The present invention also proposes a liquid scintillator fiber panel with a blind hole rate of ≤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. The blind hole rate of the liquid scintillator fiber panel processed by the device is very low, and the quality improvement is particularly obvious for panels with a large aspect ratio of the capillary. Figure 2 and attached Figure 3 As shown, attached Figure 2 This is a capillary array diagram for liquid filling without using the technical solution of the present invention. It uses the capillary siphon effect of the existing technology to fill the liquid flash. Figure 2 As can be seen from the figure, there are many unfilled capillaries 12 distributed therein; Figure 3 This is a diagram of a capillary array of liquid scintillator using the capillary array filling device of the present invention to fill liquid scintillator, which is 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 with reference to specific embodiments, but this should not be construed as limiting the scope of protection of the present invention. Non-essential improvements and adjustments made to the present invention by those skilled in the art 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 diameter 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 a pressure chamber, and a glass fiber sand core with a pore size of 3 μm is placed at the bottom of the pressure chamber. Remove the hose connecting valves A and B, turn on the vacuum pump to evacuate the closed operating box, and control the vacuum degree at 10 -2 The vacuum pump is then evacuated for 1 hour to expel air from the operating chamber. Argon is then introduced into the sealed operating chamber. A hose is connected to valve A, and the peristaltic pump is activated. Liquid scintillator is pumped into the capillary array, filling the chamber from bottom to top. The peristaltic pump flow rate is 10 mL / min. When liquid scintillator begins to flow from the end of the hose near valve B, the end of the hose near valve B is connected to the liquid in the container. Liquid scintillator is circulated and filled in the system for 3 hours. The peristaltic pump is turned off, valves A and C are closed, and the heater is activated to raise the temperature of the capillaries and the internal liquid scintillator by 8°C and maintain this temperature for 10 minutes. The heater is then turned off to cool the capillaries and the internal liquid scintillator. Valves A and C are opened, the peristaltic pump is activated, and the liquid scintillator is again circulated and filled for 3 hours, allowing the unblocked capillaries to be filled through the liquid scintillator cycle.

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

[0062] Examples 2 to 6

[0063] Same as 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 flash filling of the capillary array by the method of the present invention has a good effect. In the case of a large aspect ratio, such as 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 focus. 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 present disclosure and aid understanding of one or more of the various application aspects, in the above description of the exemplary embodiments of the present application, various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed apparatus should not be interpreted as reflecting an intention that the claimed application requires more features than those expressly recited in each claim. Rather, as reflected in the claims below, application aspects lie in fewer than all the features of the individual embodiments disclosed above. Accordingly, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of the present application.

[0070] Those skilled in the art will appreciate that the components of the apparatus in the embodiments may be adaptively modified and disposed in one or more apparatuses different from the embodiments. The components in the embodiments may be combined into a single component, or they may be divided into multiple subcomponents. All features disclosed in this specification (including the accompanying claims, abstract, and drawings), and all components of any apparatus disclosed herein, may be combined in any combination, except where at least some of such features are mutually exclusive.

[0071] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is intended to be within the scope of this application and to form different embodiments. For example, in the claims below, any of the claimed embodiments may be used in any combination. The various component embodiments of this application may be implemented in hardware, or in any combination thereof.

[0072] It should be noted that the above embodiments illustrate rather than limit the present application, and that a person skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of parts or components not listed in the claims. The word "a" or "an" preceding a part or component does not exclude the presence of a plurality of such parts or components. The present application may be implemented by means of an apparatus comprising several different parts. In claims that list 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 manner of combination is not limited to the combination obtained by reference in the claims. The technical solutions obtained by combining the technical features in the claims and / or the specification are also within the scope of protection of the present invention.

[0074] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiment based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A liquid filling method for a capillary array, characterized in that: It includes the following steps: Degassing: Exhaust the capillary array and liquid in a confined space; The capillaries constituting the capillary array have a pore diameter of ≤150 μm and an aspect ratio of ≥600; Liquid injection: the liquid enters the capillaries of the capillary array under the peristaltic action of the peristaltic pump; the liquid injection is performed by placing the capillary array in a vertical direction with the capillary axis, and the liquid enters the capillaries from the lower ends of the capillaries, flows through the capillaries, and overflows from the upper ends of the capillaries; Eliminating blind spots: placing the capillary array in a closed space, heating the capillary array, causing the liquid in the capillaries to expand due to the heat and be squeezed into the area of ​​the capillaries not filled with liquid; stopping heating; the heating temperature is 5 to 20°C higher than the filling temperature, and the heating temperature is maintained for 10 to 30 minutes; Secondary liquid injection: liquid enters the capillaries of the capillary array again under the peristaltic action of the peristaltic pump; after the second liquid injection, the blind hole rate of the capillary array is ≤1‰.

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 inert gas into the enclosed space.

3. The liquid filling method according to claim 1, characterized in that: The overflowed liquid flows back into the liquid container.

4. 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.

5. A liquid filling device for a capillary array, used to implement the liquid filling method according to any one of claims 1 to 4, 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 is configured to allow the liquid to be filled to enter the capillaries of the capillary array; 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 including a third valve disposed at the top; the second valve and the third valve are connected by a hose; a peristaltic pump including an input port and an output port; the input port is connected to the liquid container via a hose; and the output port is connected to the first valve via a hose. A heating unit is used to heat the liquid in the capillary array.

6. The liquid filling device according to claim 5, characterized in that: A glass fiber sand core is arranged downstream of the first valve and at the bottom of the pressure-resistant chamber.

7. The liquid filling device according to claim 5, 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.

8. The liquid filling device according to claim 7, characterized in that: The operation box is also provided with an interface for connecting to an air source.

9. The liquid filling device according to claim 5, characterized in that: The heating unit includes a heating body; the heating body is arranged on the periphery of the pressure-resistant chamber.

10. A liquid scintillating optical fiber panel obtained by the liquid filling method according to any one of claims 1 to 4, 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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