Device for detecting connection strength of filter membrane and filter screen

Abstract

The invention provides a device for detecting the connection strength of a filter membrane and a filter screen, relates to the technical field of membrane assembly detection, and aims to solve the technical problem that the connection strength between a membrane and a bracket in a membrane assembly for a resin exchange column cannot be effectively detected. The detection device comprises a barrel, a pressure sensor, a driving mechanism and a spring, the driving mechanism and the spring are arranged at two ends of the pressure sensor respectively, the barrel is at least used for containing resin, and one end, deviating from the pressure sensor, of the spring abuts against one side, deviating from the resin, of a membrane module; partial parts of the driving mechanism, the pressure sensor and the spring are positioned in the cylinder body; the driving mechanism comprises a force application part and a pressing plate attached to the pressure sensor, the pressing plate is slidably arranged in the barrel, and one end of the force application part abuts against the side, away from the pressure sensor, of the pressing plate. According to the invention, the connection strength between the membrane and the support in the membrane assembly used for the resin exchange column can be effectively detected in a microgravity environment.

Description

Technical Field

[0001] The present invention relates to the technical field of membrane component detection, and in particular to a membrane component detection device and a detection method. Background Art

[0002] In a microgravity environment, the resin will move back and forth in the resin exchange column during operation. Therefore, a membrane assembly needs to be placed in the resin exchange column to prevent the resin from moving.

[0003] This type of membrane assembly consists of a diaphragm and a bracket, which provides support to fix the diaphragm in a certain position. Due to the thin thickness of the diaphragm, the connection strength between the diaphragm and the bracket cannot be evaluated after processing. Summary of the invention

[0004] The object of the present invention is to provide a membrane assembly detection device and a detection method to solve the technical problem that the connection strength between the membrane and the bracket in the membrane assembly used for the resin exchange column cannot be effectively detected.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a membrane assembly detection device, wherein the membrane assembly is used to isolate resin in a resin exchange column in a microgravity environment, the membrane assembly comprises a membrane sheet and a bracket at least clamping an edge portion of the membrane sheet close to a peripheral side, and the detection device is used to detect the connection strength between the membrane sheet and the bracket;

[0007] The detection device comprises a cylinder, a pressure sensor, and a driving mechanism and a spring respectively arranged at two ends of the pressure sensor, wherein one end of the spring facing away from the sensor is used to abut against a side of the membrane assembly facing away from the resin;

[0008] Part of the driving mechanism, the pressure sensor and the spring are all located in the cylinder;

[0009] The driving mechanism includes a force-applying portion and a pressing plate attached to the pressure sensor. The pressing plate is slidably disposed in the cylinder. One end of the force-applying portion abuts against a side of the pressing plate away from the pressure sensor.

[0010] According to at least one embodiment of the present invention, the cylinder is a cylinder having an opening at one end, and the detection device further comprises a cover body covering the opening;

[0011] The force applying part includes a screw rod, the screw rod penetrates the cover body, and the screw rod is threadedly connected with the cover body.

[0012] According to at least one embodiment of the present invention, the pressing plate has a first end surface facing away from the pressure sensor, and the pressing plate has a limiting portion protruding from the first end surface, and the limiting portion protrudes in a direction close to the cover body;

[0013] The screw rod faces the second end face of the pressure sensor, and the screw rod further has a limiting groove formed on the second end face and matched with the limiting portion, and the limiting portion is rotatably disposed in the limiting groove.

[0014] According to at least one embodiment of the present invention, the force applying portion further includes a torsion bar provided at an end portion of the screw rod located outside the barrel, and the torsion bar is used for rotating the screw rod.

[0015] According to at least one embodiment of the present invention, the end of the screw outside the barrel has a screw hole for the torsion rod to pass through, and the torsion rod has a threaded section near the middle, and the threaded section is connected to the screw through the screw hole.

[0016] According to at least one embodiment of the present invention, a truncated cone arranged around the outer circumference of the torsion rod is further provided at a portion of the torsion rod close to the threaded section, and the truncated cone is used to limit the position of the torsion rod on the screw rod.

[0017] According to at least one embodiment of the present invention, the detection device further comprises a conversion sleeve disposed between the pressure sensor and the spring, the conversion sleeve comprising a sleeve and a flange disposed at one end of the sleeve;

[0018] One side of the flange abuts against the pressure sensor, and the other side of the flange abuts against the spring. The outer diameter of the sleeve is smaller than or equal to the inner diameter of the spring.

[0019] According to at least one embodiment of the present invention, the axes of the limiting portion, the pressure sensor, the conversion sleeve and the spring all coincide with the axis of the cylinder.

[0020] According to at least one embodiment of the present invention, the cylinder is made of a transparent material; or,

[0021] The cylinder also has a window arranged along the axial direction of the cylinder, and the window is used for electrical connection between the pressure sensor and external equipment, or the window is also used to observe the damage of the membrane assembly.

[0022] According to at least one embodiment of the present invention, the bracket includes a clamping plate, an inner cylinder, and an outer cylinder arranged outside the inner cylinder, and the axial length of the inner cylinder is greater than the axial length of the outer cylinder;

[0023] An annular groove is formed on the end surface of the outer cylinder facing the resin, and the bottom of the annular groove extends to the cavity of the outer cylinder;

[0024] The diaphragm is fixed to the bracket by the edge of the clamping plate cooperating with the bottom of the annular groove;

[0025] One end of the spring is arranged in the cavity of the inner cylinder.

[0026] Among the one or more technical solutions provided in the exemplary embodiments of the present invention, at least one of the following beneficial effects can be achieved.

[0027] (1) The membrane assembly detection device of the embodiment of the present invention includes a cylinder, in which resin particles, a membrane assembly, a spring, a pressure sensor and a driving mechanism are arranged in sequence, wherein the driving mechanism includes a force-applying part and a pressure plate, the pressure plate is slidably arranged in the cylinder and the pressure plate is in contact with the pressure sensor, and the force is applied to the membrane assembly through the pressure sensor and the spring through the downward pressure of the force-applying part, and the spring is in contact with the membrane assembly and does not completely cover the entire surface of the membrane assembly. The connection between the diaphragm and the bracket in the membrane assembly is destroyed by the extrusion between the spring and the resin, and then the connection strength between the diaphragm and the bracket can be measured by the pressure detection of the pressure sensor.

[0028] (2) A spring is arranged between the pressure sensor and the membrane assembly in the exemplary embodiment of the present invention. On the one hand, the spring will play a certain buffering role during the assembly process. Since the diaphragm is very thin and the connection strength between the diaphragm and the bracket is very small, a large squeezing force will not be generated on the diaphragm during the assembly process, thereby not causing detection failure. On the other hand, when the force-applying part starts to apply pressure, a certain impact is inevitably generated. Under the buffering effect of the spring, the force-applying part can make the force applied to the membrane assembly have a certain uniform effect, that is, the force applied to the membrane assembly is smooth and without peaks, thereby making the detection accuracy of the connection strength between the diaphragm and the bracket higher.

[0029] In a second aspect, the present invention further provides a membrane module detection method, comprising the detection device provided in the first aspect, the detection method comprising:

[0030] A resin and a membrane assembly are placed in sequence at the bottom of the cylinder, and the membrane assembly is gap-matched with the inner wall of the cylinder;

[0031] Assembling the spring and the conversion sleeve and placing them in the cylinder, wherein one end of the spring is embedded in the inner cylinder of the support of the membrane assembly;

[0032] The pressure sensor and the pressure plate are fixedly connected and placed into the cylinder, the pressure sensor is kept out of contact with the conversion sleeve, and the recorder connected to the pressure sensor is reset to zero;

[0033] The cover body is arranged on the opening of the cylinder body and fixed, and the screw rod is rotated at a constant speed to abut against the pressing plate and press downward until resin particles appear on the side of the diaphragm facing the spring.

[0034] The advantages of the membrane assembly detection method over the prior art are the same as the advantages of the membrane assembly detection device provided in the first aspect over the prior art, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings illustrate exemplary embodiments of the present invention and together with the description serve to explain the principles of the present invention, and these drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification;

[0036] Figure 1 is a schematic side view of the structure of a detection device according to an embodiment of the present invention;

[0037] Figure 2 yes Figure 1 AA section view;

[0038] Figure 3 is a schematic diagram of the main structure of a detection device according to an embodiment of the present invention;

[0039] Figure 4 is a schematic diagram of a three-dimensional structure of a membrane assembly according to an embodiment of the present invention;

[0040] Figure 5 is a schematic diagram of a top view of a membrane assembly according to an embodiment of the present invention;

[0041] Figure 6 yes Figure 5 BB cross-sectional view.

[0042] Figure numerals: 10, cylinder; 11, cover; 12, window; 20, membrane assembly; 21, inner cylinder; 22, outer cylinder; 23, diaphragm; 24, clamping plate; 30, resin; 40, spring; 50, conversion sleeve; 51, sleeve; 52, flange; 60, pressure sensor; 71, screw; 72, pressure plate; 721, first end face; 722, limit portion; 73, torsion bar; 731, truncated table. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below in conjunction with the accompanying drawings and implementation modes.

[0044] The resin exchange column works in a microgravity environment. In order to ensure that the resin does not move or overflow, a membrane assembly needs to be set above and below the resin to achieve normal operation of the resin exchange column. In related technologies, the membrane assembly is generally composed of a diaphragm and a bracket. Since the diaphragm is very thin, the firmness of the connection between the diaphragm and the bracket cannot be evaluated after the processing is completed.

[0045] In response to the above problems, a membrane assembly detection device provided by an exemplary embodiment of the present invention arranges a membrane assembly above the resin, and sequentially arranges a spring, a pressure sensor and a driving mechanism above the membrane assembly, so that pressure is generated between the diaphragm and the resin by pressing down, and the firmness of the membrane assembly is detected by the pressure recorded by the pressure sensor. The working state of the membrane assembly of the resin exchange column in a microgravity environment can be truly simulated, thereby accurately evaluating the firmness of the membrane assembly.

[0046] Figure 4 is a schematic diagram of a three-dimensional structure of a membrane assembly according to an embodiment of the present invention; Figure 5 is a schematic diagram of a top view of a membrane assembly according to an embodiment of the present invention; Figure 6 yes Figure 5 BB cross-sectional view. Figure 4-Figure 6 As shown, in the membrane assembly detection device provided by an exemplary embodiment of the present invention, the membrane assembly 20 is used to isolate the resin 30 in the resin exchange column under a microgravity environment. The membrane assembly 20 includes a diaphragm 23 and a bracket that at least clamps the edge portion of the diaphragm 23 close to the peripheral side. The detection device is used to detect the connection strength between the diaphragm 23 and the bracket.

[0047] Figure 1 is a schematic side view of the structure of a detection device according to an embodiment of the present invention; Figure 2 yes Figure 1 AA cross-section diagram. Figure 1-Figure 2 As shown, the membrane assembly detection device of an exemplary embodiment of the present invention includes a cylinder 10, a pressure sensor 60, and a driving mechanism and a spring 40 respectively arranged at both ends of the pressure sensor 60, the end of the spring 40 away from the pressure sensor is used to abut against the side of the membrane assembly away from the resin 30; part of the driving mechanism, the pressure sensor 60 and the spring 40 are located in the cylinder 10; the driving mechanism includes a force-applying part and a pressure plate 72 fitted with the pressure sensor 60, the pressure plate 72 can be slidably arranged in the cylinder 10, and one end of the force-applying part abuts against the side of the pressure plate 72 away from the pressure sensor 60.

[0048] In actual application, resin and membrane assembly 20 are placed in sequence in the cylinder 10, and a spring 40 and a pressure sensor 60 are arranged above the membrane assembly 20 in the cylinder 10, wherein one end of the spring 40 abuts against the bottom of the pressure sensor 60, and the other end of the spring 40 abuts against the top of the membrane assembly 20. A pressing plate 72 is also arranged on the top of the pressure sensor 60. Since the pressing plate 72 is slidably arranged in the cylinder 10, that is, the outer contour of the pressing plate 72 matches the inner wall surface of the cylinder 10. When the force-applying part of the driving mechanism applies pressure downward, the pressing plate 72 and the pressure sensor 60 move downward in the cylinder 10, thereby compressing the spring 40, and the spring 40 transmits pressure to the membrane assembly 20, and a certain pressure is generated between the diaphragm 23 and the resin 30 in the membrane assembly 20. When the pressure reaches a certain threshold, the diaphragm 23 and the bracket will be damaged. By recording the pressure value of the pressure sensor 60, the connection strength between the diaphragm 23 and the bracket can be obtained.

[0049] In the membrane assembly detection device provided by the exemplary embodiment of the present invention, when the force-applying part of the driving mechanism applies pressure, it is inevitable that a pressure peak will be generated, and the diaphragm 23 in the membrane assembly 20 is very thin and can be easily damaged, affecting the accuracy of the test result. The spring 40 is arranged between the membrane assembly 20 and the pressure sensor 60. Since the spring 40 has a certain buffering effect, even if the pressure-applying process of the force-applying part is discontinuous and uneven, under the action of the spring 40, the detection result of the detection device is reliable, and the problem of failure of the detection experiment is not likely to occur.

[0050] The membrane assembly detection device provided by the exemplary embodiment of the present invention truly simulates the working environment of the membrane assembly 20 in the actual resin exchange column through direct contact between the membrane assembly 20 and the resin 30 and pressure applied by the force-applying part of the driving mechanism, so that the test results of the detection device are more in line with actual usage.

[0051] like Figure 1-Figure 2 As shown, the cylinder 10 in the membrane assembly detection device is a cylinder 10 with an opening at one end, and the cylinder 10 also has a cover 11 covering the opening at the opening position; the force-applying part includes a screw 71, the screw 71 passes through the cover 11, and the screw 71 is threadedly connected to the cover 11.

[0052] Exemplarily, the cover 11 has an internal thread, so that the cover 11 is covered on the open end of the barrel 10 by means of a threaded connection. By providing a threaded through hole on the cover 11, the screw 71 can be screwed in or out of the threaded through hole. From another perspective, one end of the screw 71 is inside the barrel 10; the other end extends out of the barrel 10, and the screw 71 is rotated by the driving device.

[0053] Since the force between the membrane assembly 20 and the resin 30 needs to be applied smoothly and slowly, the exemplary embodiment of the present invention provides a method of rotating the screw 71 and the cover body 11, and the required force parameters can be achieved by adjusting the pitch of the screw 71 according to the actual required feed distance and force speed.

[0054] Through the threaded matching relationship between the screw 71 and the cover 11, on the one hand, the cover 11 provides a support platform for the screw 71 and limits the feeding distance, and on the other hand, the cover 11 can be detachably connected to the barrel 10 through the thread, so that the membrane assembly 20, the resin 30 and other components that need to be set in the barrel 10 can be conveniently placed therein. The matching between the cover 11 and the screw 71 and the matching between the cover 11 and the barrel 10 makes the detection process of the detection device simple and efficient.

[0055] like Figure 2 As shown, considering that the screw 71 needs to abut against the pressure plate 72 to apply pressure, and the pressure plate 72 is slidably arranged in the barrel 10, since the cross-sectional area of ​​the screw 71 is much smaller than the inner diameter of the barrel 10, in order to press the pressure plate 72 vertically downward, it is necessary to form a limit between the screw 71 and the pressure plate 72 to avoid the unbalanced force of the screw 71 on the pressure plate 72, resulting in inaccurate strength test results of the final membrane assembly. Exemplarily, the pressure plate 72 has a first end face 721 away from the pressure sensor 60, and the pressure plate 72 has a limit portion 722 protruding from the first end face 721, and the limit portion 722 protrudes in the direction close to the cover body 11; the screw 71 has a second end face facing the pressure sensor 60, and the screw 71 also has a limit groove formed on the second end face to cooperate with the limit portion 722, and the limit portion 722 is rotatably arranged in the limit groove.

[0056] Exemplarily, the limiting portion 722 may be integrally formed with the pressing plate 72 as a raised portion of the pressing plate 72 , for example, a central axis of the limiting portion 722 coincides with a central axis of the pressing plate 72 .

[0057] In another optional embodiment, the limiting portion 722 may be a screw or bolt structure, such as Figure 2 As shown, a countersunk hole is opened in the center of the pressure plate 72 on the side of the pressure plate 72 facing the pressure sensor 60, the nut of the screw is set in the countersunk hole, and the main body of the screw extends from the first end face 721 of the pressure plate 72 in a direction away from the first end face 721. This embodiment is simpler to manufacture the pressure plate 72 than one-piece molding.

[0058] like Figure 2As shown, in order to cooperate with the limiting portion 722, a limiting groove arranged along the axial direction of the screw 71 is formed on the second end face of the screw 71, that is, the limiting portion 722 is clearance-matched with the limiting groove, so that the limiting portion 722 can rotate in the limiting groove. This implementation method of clearance matching can make it necessary to rotate the screw 71 when pressure is applied, without causing the pressure plate 72 and the corresponding pressure sensor 60 to rotate together.

[0059] For example, the pressure plate 72 and the pressure sensor 60 may be fixed by screw connection, or other fixing methods may be used to fit the pressure plate 72 and the pressure sensor 60, such as adhesive connection. Figure 2 As shown, a plurality of holes can be opened on the periphery of the pressure plate 72, and the two can be fixedly connected together by a plurality of screws.

[0060] In one embodiment, the force applying part in the membrane module detection device provided by the exemplary embodiment of the present invention further includes a torsion bar 73 provided at the end of the screw 71 outside the cylinder 10 , and the torsion bar 73 is used for rotating the screw 71 . Figure 3 Schematic diagram of the main structure of the detection device according to the embodiment of the present invention. Figure 2-Figure 3 As shown, the end of the screw rod 71 located outside the barrel 10 has a screw hole for the torsion rod 73 to pass through, and the torsion rod 73 has a threaded section near the middle, and the threaded section is connected to the screw rod 71 through the screw hole.

[0061] In practical applications, when it is necessary to perform force detection on the membrane assembly 20, the power source of the force-applying part can be manually rotated by the screw rod 71. Specifically, a threaded section is provided near the middle of the torsion bar 73, so that the torsion bar 73 can be threadedly fixed in the screw hole of the screw rod 71, that is, both ends of the torsion bar 73 extend out of the screw hole of the screw rod 71, so that during the rotation of the screw rod 71, the torsion bars 73 on both sides can alternately apply force, so as to maintain the continuity of the force application, thereby ensuring the accuracy of the strength detection of the membrane assembly.

[0062] In order to ensure that the middle part of the torsion rod 73 is located in the screw hole of the screw rod 71, a round table 731 is arranged on the outer peripheral surface of the torsion rod 73 near the threaded section of the torsion rod 73. The round table 731 is used to limit the position of the torsion rod 73 on the screw rod 71, thereby ensuring that it is fixed in place during the installation process.

[0063] like Figure 2As shown, in order to further improve the accuracy of the test results of the detection device, the membrane module detection device provided by the exemplary embodiment of the present invention also includes a conversion sleeve 50 arranged between the pressure sensor 60 and the spring 40, and the conversion sleeve 50 includes a sleeve 51 and a flange 52 arranged at one end of the sleeve 51; one side of the flange 52 abuts against the pressure sensor 60, and the other side of the flange 52 abuts against the spring 40, and the outer diameter of the sleeve 51 is less than or equal to the inner diameter of the spring 40. The conversion sleeve 50 is composed of the sleeve 51 and the flange 52. The conversion sleeve 50 is similar to the shape of a flange. The end of the sleeve 51 with the flange 52 has a flush end surface, the diameter of the flange 52 is greater than the outer diameter of the spring 40, and the outer diameter of the sleeve 51 is less than or equal to the inner diameter of the spring 40, that is, the end of the spring 40 abuts against the lower side of the flange 52, and the sleeve 51 is embedded in the inner cavity of the spring 40. One end of the sleeve 51 with the flange 52 has a flush end surface that fits with the pressure sensor 60. For example, the outer diameter of the flange 52 is greater than or equal to the inner diameter of the pressure sensor 60. Since the end of the spring 40 is generally not a plane, when it fits with the pressure sensor 60, an unbalanced fit will be formed, which will affect the accuracy of the detection result. On the other hand, the sleeve 51 is embedded in the cavity of the spring 40 for a certain length, and can also limit the spring 40 to prevent the spring 40 from shifting in the radial direction in the cylinder 10, affecting the accuracy of the detection result.

[0064] like Figure 4-Figure 6 As shown, the bracket includes a clamping plate 24, an inner cylinder 21, and an outer cylinder 22 arranged outside the inner cylinder 21, the axial length of the inner cylinder 21 is greater than the axial length of the outer cylinder 22; an annular groove is formed on the end surface of the outer cylinder 22 facing the resin 30, and the bottom of the annular groove extends to the cavity of the outer cylinder 22; the diaphragm 23 is fixed to the bracket by the edge of the clamping plate 24 and the bottom of the annular groove. Exemplarily, the height of the inner cylinder 21 of the bracket is greater than the height of the outer cylinder 22, that is, the inner cylinder 21 forms a protruding ring, and the inner cylinder 21 and the outer cylinder 22 are connected together through a hollow structure, and the bottom of the inner cylinder 21 is also a hollow structure. Correspondingly, the clamping plate 24 is also a hollow structure, that is, the holes of the clamping plate 24 are arranged one-to-one with the holes on the hollow structure connecting the inner cylinder 21 and the outer cylinder 22 and the hollow structure at the bottom of the inner cylinder 21. Based on this, the annular groove on the outer cylinder 22, that is, the stepped surface, cooperates with the clamping plate 24 to clamp the circumferential edge of the diaphragm 23, so that the diaphragm 23 is connected to the bracket. For example, the corresponding skeleton part between the hollow structure of the clamping plate 24 and the hollow structure of the bracket can also play a certain clamping role on the diaphragm 23.

[0065] When the resin 30 is placed at the bottom of the membrane assembly 20 and pressure is applied, the resin 30 will directly contact the diaphragm 23 through the hollow structure of the clamping plate 24. Exemplarily, one end of the spring 40 away from the pressure sensor 60 abuts against the side of the bracket away from the resin. When the outer diameter of the spring 40 is less than or equal to the inner diameter of the inner cylinder 21, the end of the spring 40 is embedded in the inner cylinder 21 and abuts against the hollow structure in the inner cylinder 21 to apply corresponding pressure. Optionally, when the outer diameter of the spring 40 is larger and the same as the inner diameter of the outer cylinder 22 of the bracket, it can be applied to a bracket without an inner cylinder, that is, the spring 40 is embedded in the outer cylinder 22 and abuts against the hollow structure at the bottom of the outer cylinder 22. Based on this, whether the end of the spring 40 is embedded in the inner cylinder 21 or in the outer cylinder 22 without an inner cylinder, the spring 40 can be limited, thereby limiting the displacement of the spring 40 in the lateral direction, that is, in the radial direction of the cylinder 10, so that the accuracy of the measurement result of the detection device is high.

[0066] It should be noted that when the membrane assembly 20 is placed in the cylinder 10 , there is a clearance fit between the membrane assembly 20 and the inner wall of the cylinder 10 .

[0067] It is understandable that in order to ensure the accuracy of the test results, Figure 2 As shown, the axes of the stopper 722, the pressure plate 72, the pressure sensor 60, the conversion sleeve 50 and the spring 40 are all coincident with the axis of the cylinder 10. In this embodiment, the screw rod that is more conducive to applying force can transmit the downward pressure vertically downward, and finally apply it to the membrane assembly, the test result is accurate, and for multiple measurements of the same membrane assembly, the test result reproducibility is good.

[0068] In the membrane assembly detection device provided by the exemplary embodiment of the present invention, when the membrane assembly is damaged, that is, the membrane 23 is separated from the bracket, or the membrane 23 is separated from the bracket, causing the resin 30 particles to overflow from the rupture, the pressure applied at this moment can be determined as the connection strength between the membrane 23 and the bracket. In order to observe and determine this damage state, the cylinder 10 is a cylinder 10 made of a transparent material, for example, the cylinder 10 is a cylinder made of a polycarbonate material.

[0069] In another optional embodiment, if Figure 3 As shown, the membrane assembly detection device can also be provided with a window 12 on the shell of the cylinder 10, and the window 12 is a rectangular window, and the length direction of the window 12 is the axial direction of the cylinder 10. The window 12 is provided on the shell of the cylinder 10. On the one hand, the integrity of the diaphragm in the membrane assembly 20 can be observed during the pressure application process; on the other hand, the window 12 can also be used for the electrical connection between the pressure sensor 60 and the external device. For example, the cable connecting the pressure sensor 60 is connected to the external device through the window 12, such as a recorder or a PLC controller, so as to record the data of the pressure sensor 60.

[0070] An exemplary embodiment of the present invention further provides a membrane module detection method, including the detection device provided in the first aspect, and the membrane module detection method includes:

[0071] Step S1, placing the resin 30 and the membrane assembly 20 in sequence at the bottom of the cylinder 10, with the membrane assembly 20 and the inner wall of the cylinder 10 having a clearance fit;

[0072] Step S2, assembling the spring 40 and the conversion sleeve 50 and placing them in the cylinder 10, wherein one end of the spring 40 is embedded in the inner cylinder 21 of the bracket of the membrane assembly 20;

[0073] Step S3, the pressure sensor 60 and the pressing plate 72 are fixedly connected and placed in the cylinder 10, and the pressure sensor 60 is kept not in contact with the conversion sleeve 50, for example, the pressing plate 72 and the pressure sensor 60 are clamped by a tool, and the recorder external to the pressure sensor 60 is reset to zero, wherein the pressing plate 72 cooperates with the inner wall of the cylinder 10, and the pressing plate 72 can be slidably arranged in the cylinder 10;

[0074] Step S4, the cover body 11 is covered on the opening of the cylinder body 10 and fixed, and the screw 71 is rotated at a constant speed to abut against the pressure plate 72 and press down until resin particles appear on the side of the diaphragm 23 facing the spring 40. At the same time, the data of the pressure sensor 60 is output through the recorder to finally obtain the connection strength between the diaphragm 23 and the bracket.

[0075] As can be seen from the above, the membrane assembly detection device provided by the exemplary embodiment of the present invention can detect the connection strength of the membrane assembly used for resin isolation in the resin exchange column under a microgravity environment. By arranging the resin at the bottom of the cylinder, arranging the membrane assembly on the top of the resin particles, arranging the spring above the membrane assembly, and arranging the pressure sensor between the spring and the driving mechanism, the use condition of the membrane assembly in the resin exchange column under a microgravity environment can be truly simulated. Therefore, the measured connection strength between the diaphragm and the bracket can reflect the pressure that can be borne during actual use. The feeding distance can be controlled by manually controlling the rotational torque of the screw and the pitch of the threaded connection between the screw and the cover body, and the pressure can be applied to the membrane assembly smoothly and stably. Furthermore, a spring is arranged between the membrane assembly and the pressure sensor, and the impact peak generated during the assembly process or the force application process is reduced by the buffering effect of the spring, so that the accuracy of the detection of the membrane assembly detection device is guaranteed.

[0076] It should be understood by those skilled in the art that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present invention.

Claims

1. A membrane module detection device, characterized in that: The membrane assembly is used to isolate the resin in the resin exchange column under a microgravity environment, the membrane assembly comprises a membrane and a bracket at least clamping the edge portion of the membrane close to the peripheral side, and the detection device is used to detect the connection strength between the membrane and the bracket; The detection device comprises a cylinder, a pressure sensor, and a driving mechanism and a spring respectively arranged at two ends of the pressure sensor, wherein the cylinder is used to contain at least resin, and an end of the spring facing away from the pressure sensor is used to abut against a side of the membrane assembly facing away from the resin; Part of the driving mechanism, the pressure sensor and the spring are all located in the cylinder; The driving mechanism includes a force-applying portion and a pressing plate attached to the pressure sensor. The pressing plate is slidably disposed in the cylinder. One end of the force-applying portion abuts against a side of the pressing plate away from the pressure sensor.

2. The detection device according to claim 1, characterized in that: The cylinder is a cylinder having an opening at one end, and the detection device further comprises a cover body covering the opening; The force applying part includes a screw rod, the screw rod penetrates the cover body, and the screw rod is threadedly connected with the cover body.

3. The detection device according to claim 2, characterized in that: The force applying part further includes a torsion bar provided at an end portion of the screw rod located outside the cylinder, and the torsion bar is used for rotating the screw rod.

4. The detection device according to claim 3, characterized in that: The end of the screw rod located outside the barrel is provided with a screw hole for the torsion rod to penetrate, and the torsion rod has a threaded section, and the threaded section is connected to the screw rod through the screw hole.

5. The detection device according to claim 4, characterized in that: The torsion bar is further provided with a truncated cone arranged around the outer circumference of the torsion bar, and the truncated cone is used to limit the position of the torsion bar on the screw rod.

6. The detection device according to any one of claims 1 to 5, characterized in that: The detection device further comprises a conversion sleeve arranged between the pressure sensor and the spring, wherein the conversion sleeve comprises a sleeve and a flange arranged at one end of the sleeve; One side of the flange abuts against the pressure sensor, and the other side of the flange abuts against the spring. The outer diameter of the sleeve is smaller than or equal to the inner diameter of the spring.

7. The detection device according to any one of claim 6, characterized in that: The axes of the pressure sensor, the conversion sleeve and the spring all coincide with the axis of the cylinder.

8. The detection device according to any one of claims 1 to 5, characterized in that: The cylinder is made of transparent material.

9. The detection device according to any one of claims 1 to 5, characterized in that: The bracket comprises a clamping plate, an inner cylinder and an outer cylinder arranged around the inner cylinder, and the axial length of the inner cylinder is greater than the axial length of the outer cylinder; An annular groove is formed on the end surface of the outer cylinder facing the resin, and the bottom of the annular groove extends to the cavity of the outer cylinder; The diaphragm is fixed to the bracket by the edge of the clamping plate cooperating with the bottom of the annular groove; One end of the spring is arranged in the cavity of the inner cylinder.

10. A membrane module detection method, characterized in that: The membrane assembly is detected using the detection device according to any one of claims 1 to 9, and the detection method comprises: Resin and a membrane assembly are placed in sequence at the bottom of the cylinder, and the membrane assembly is gap-matched with the inner wall of the cylinder; Assembling the spring and the conversion sleeve and placing them in the cylinder, wherein one end of the spring is embedded in the inner cylinder of the support of the membrane assembly; The pressure sensor and the pressure plate are fixedly connected and placed into the cylinder, the pressure sensor is kept out of contact with the conversion sleeve, and the recorder connected to the pressure sensor is reset to zero; The cover body is arranged on the opening of the cylinder body and fixed, and the screw rod is rotated at a constant speed to abut against the pressing plate and press downward until resin particles appear on the side of the diaphragm facing the spring.

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