Automatic measuring device for filter center tube size

Abstract

The present invention provides an automatic measuring device for the size of a filter center tube, which is applied to the field of center tube measurement technology. The device comprises a mobile frame, a measuring platform fixed to the upper end face of the mobile frame, a center tube measuring mechanism for symmetrically abutting the two sides of the center tube to be measured, and a measuring sensor provided on the measuring platform. The center tube measuring mechanism comprises a measuring sensor; a measuring head provided at the measuring end of the measuring sensor, two measuring sensors and two measuring heads provided correspondingly, the measuring heads being used to symmetrically abut the two side surfaces of the center tube to be measured to form an outer diameter measurement, and the contact surface of the measuring head being a cylindrical convex surface. The present invention can not only automatically measure the center tube, using line contact to replace the surface contact measurement in the prior art, effectively avoiding measurement deviations caused by parallelism errors of the measuring head, but also can utilize the measuring action to link an air jet cleaning mechanism to achieve automatic cleaning, thereby preventing dirt remaining on the surface of the center tube from affecting the measurement results, and having a good overall use effect.

Description

Technical Field

[0001] The invention belongs to the technical field of central tube measurement, and in particular relates to automatic measuring equipment for the size of a filtering central tube. Background Art

[0002] Reverse osmosis technology has seen widespread adoption in recent years. The center tube, a crucial component of reverse osmosis spiral membrane elements, serves to guide and collect purified water. Membrane element specifications used in mature markets, such as 4040 or 8040, have corresponding center tube dimensions. The center tube is a hollow cylindrical extruded thermoplastic. Considering the membrane element's winding process and downstream applications, the key center tube dimensions are generally considered to be its length, inner diameter, and outer diameter. The outer diameter, in particular, directly impacts the product dimensions of the spiral membrane element.

[0003] Currently, after continuous extrusion, existing core tubes are typically mechanically cut to the desired length, followed by manual measurement of key dimensions. However, this manual measurement method is not only labor-intensive, but also results in poor consistency in measurement data due to differences in measuring tools and techniques, impacting the quality of the core tube measurements. Some existing technologies utilize automatic measuring equipment, but most of their measuring heads utilize a flat structure, resulting in surface contact. This makes it impossible to ensure that the two measuring heads are perfectly aligned and that the outer diameter of the core tube is perfectly parallel, which can easily increase measurement errors. Furthermore, dust or oil stains on the pipe surface can further amplify measurement deviations, and traditional solutions lack effective countermeasures.

[0004] Therefore, the present invention proposes an automatic measuring device for the size of a filter central tube to solve the above technical problems. Summary of the Invention

[0005] In view of the above problems in the prior art, the purpose of the present invention is to provide an automatic measuring device for the size of a filter central tube, which has both high precision and anti-interference capabilities and can effectively meet the existing needs for measuring the size of the central tube.

[0006] An automatic measuring device for the size of a filter central tube, comprising:

[0007] A movable frame, wherein a measuring platform is fixed to the upper end surface of the movable frame, and a central tube measuring mechanism for symmetrically abutting two sides of the central tube to be measured is provided on the measuring platform, and the central tube measuring mechanism includes a measuring sensor;

[0008] A measuring head, the measuring head being arranged at the measuring end of the measuring sensor, two measuring sensors being provided corresponding to the measuring heads, the measuring heads being used to symmetrically abut against the two side surfaces of the central tube to be measured to form outer diameter measurement, and the contact surface of the measuring head being a cylindrical convex surface, being used to form linear contact with the outer wall of the central tube to be measured;

[0009] The jet cleaning mechanism is used to open and close along with the activity process of the measuring sensor during measurement, and to perform jet cleaning on the surface of the central tube to be measured before measurement.

[0010] Preferably, an electrical box and an air pump are provided in the movable frame, and the air pump is used to provide an air source for the jet cleaning mechanism.

[0011] Preferably, a man-machine operating mechanism and an early warning module are provided on the measuring platform. The man-machine operating mechanism cooperates with the electrical box to form electrical control of the central tube measuring mechanism, and the early warning module is used to visually display whether the central tube measurement result is qualified.

[0012] Preferably, a horizontal base is fixed on the measuring table, and a fixing seat is provided at one end of the base for fixing the center tube horizontally. The other end of the base cooperates with the center tube measuring mechanism to measure the outer diameter of the center tube, and the fixing seat is connected to a second motor for driving the fixing seat to rotate after fixing the center tube.

[0013] Preferably, the central tube measuring mechanism further comprises a measuring frame, the measuring frame is slidably arranged on the base, and the two measuring sensors are symmetrically arranged on both sides of the measuring frame.

[0014] Preferably, two cylinders are symmetrically fixed on the outside of both sides of the measuring frame, and the shafts of the two cylinders are respectively fixed to the two measuring sensors, so as to drive the two measuring sensors to move symmetrically toward each other.

[0015] Preferably, the air jet cleaning mechanism comprises a material passing barrel installed in the middle of the measuring frame, the material passing barrel is used for the central tube to be measured to pass through horizontally, and a plurality of air jet nozzles are arranged around the inner side of the material passing barrel.

[0016] Preferably, ventilation cylinders are fixed on both sides of the measuring frame, and air passages are opened in the inner walls of both sides of the measuring frame. The air passages connect the ventilation cylinders and the air nozzles, and the ventilation cylinders are connected to the air pump through an air pipe.

[0017] Preferably, a spacer is provided in the middle of the vent cylinder to separate the air pipe and the air duct, and a movable plate is slidably installed in the vent cylinder, one end of which is fixed to the measuring sensor to form a linkage structure that moves with the measuring sensor.

[0018] Preferably, a ventilation groove is provided in the middle of the movable plate, and when the ventilation groove is located at the spacer block, it is used to connect the air pipe and the air duct.

[0019] The beneficial effects of the present invention are:

[0020] This automatic measuring equipment for the size of the filter center tube benefits from the special structural setting of the measuring head, which enables the measuring head to form line contact with the outer wall of the center tube to be measured. Compared with the surface contact method during measurement in the existing technology, the curved surface structure of the measuring head can eliminate the measurement deviation caused by the parallelism error of the measuring head. The curvature of the contact surface of the measuring head matches the outer diameter of the center tube, which can ensure that the measuring point is evenly stressed and avoid the accuracy affected by local deformation.

[0021] At the same time, when using this equipment to measure the outer diameter of the center tube, the displacement of the measuring sensor during measurement can be linked to the jet cleaning mechanism to perform automatic operation for a period of time, so that the air nozzle can be ventilated and spray air, and the high-pressure airflow is used to remove oil and debris on the surface of the center tube to prevent impurities on the surface of the center tube from interfering with the measurement accuracy. The air jet will automatically stop when the measuring head touches the surface of the center tube for measurement to prevent wind from interfering with the measurement results.

[0022] To sum up, the present invention can not only automatically measure the center tube and use line contact to replace the surface contact measurement in the prior art, effectively avoiding the measurement deviation caused by the parallelism error of the measuring head, but also use the measuring action to link the jet cleaning mechanism to achieve automatic cleaning, thereby avoiding the residual dirt on the surface of the center tube affecting the measurement results, and the overall use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the base of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the central tube measuring mechanism of the present invention;

[0027] Figure 4 This is a schematic structural diagram of the measuring head of the present invention measuring the central tube;

[0028] Figure 5 It is a schematic diagram of the internal structure of the central tube measuring mechanism of the present invention;

[0029] Figure 6 The present invention Figure 5 A magnified schematic diagram of the structure at A in the middle;

[0030] Figure 7 It is a structural schematic diagram of the movable plate of the present invention connecting the air pipe and the airway in the ventilator.

[0031] The markings in the figure are: 1. Mobile frame; 101. Electrical box; 102. Air pump; 2. Measuring platform; 201. Human-machine operating mechanism; 202. Early warning module; 3. Base; 301. Slide; 302. Screw; 303. First motor; 4. Fixed seat; 401. Second motor; 5. Measuring frame; 501. Feed barrel; 502. Air nozzle; 503. Air duct; 6. Cylinder; 7. Measuring sensor; 8. Measuring head; 9. Movable plate; 901. Ventilation groove; 10. Ventilation cylinder; 1001. Spacer; 11. Air pipe. DETAILED DESCRIPTION

[0032] Example 1:

[0033] like Figure 1 and Figure 2 As shown, an automatic measuring device for the size of a filter central tube includes a mobile frame 1. Four universal wheels are provided at the bottom of the mobile frame 1. Brake pads are provided on the universal wheels to facilitate the movement and positioning of the equipment. A measuring platform 2 is fixedly installed on the upper end surface of the mobile frame 1.

[0034] A horizontal base 3 is fixed to the measuring table 2. One end of the base 3 is equipped with a fixed base 4 with a second motor 401. The fixed base 4 is a horizontal clamping structure used to fix the center tube horizontally on the base 3. The second motor 401 can be used to drive the fixed base 4 to rotate after fixing the center tube. The other end of the base 3 is provided with a center tube measuring mechanism for measuring the outer diameter of the center tube. In specific implementation, the horizontal clamping structure is pneumatically driven, and the opening and closing of the clamping jaws are achieved by the extension and contraction of a cylinder. The cylinder can be installed inside the fixed base 4, and the second motor 401 can be connected to the clamping jaw portion via a reducer, which can drive the fixed base 4 to rotate and adjust after fixing the center tube. In this embodiment, the clamping force of the fixed base 4 on the center tube can be controlled by adjusting the cylinder air pressure, ensuring that the center tube is stably fixed during the measurement process and preventing damage to the center tube due to excessive clamping force.

[0035] Cooperate Figure 3 As shown, the central tube measuring mechanism comprises a measuring frame 5 slidably mounted on a base 3, two measuring sensors 7 are symmetrically mounted on both sides of the measuring frame 5, and a measuring head 8 is provided at the measuring end of each measuring sensor 7. Figure 4As shown, the contact surfaces of the two measuring heads 8 are designed as cylindrical convex surfaces, which can symmetrically abut against both sides of the center tube to be measured to form a line-contact outer diameter measurement. This structure can eliminate measurement deviations caused by parallelism errors of the measuring heads 8 and ensure uniform force at the measurement points. In this embodiment, a slide groove 301 is defined at the bottom of the base 3. The bottom of the measuring frame 5 is slidably mounted within the slide groove 301. A screw 302 is rotatably mounted within the slide groove 301. The screw 302 threads through the bottom of the measuring frame 5. One end of the screw 302 is also connected to a first motor 303. The first motor 303 can be used to drive the screw 302 to rotate, thereby driving the measuring frame 5 to slide on the base 3.

[0036] In addition, two pneumatic cylinders 6 are symmetrically fixed to the outside of the measuring frame 5 on either side. The shafts of the two cylinders 6 are respectively fixed to the two measuring sensors 7, which are used to drive the two measuring sensors 7 to move symmetrically toward each other. Therefore, the pneumatic cylinders 6 can be used to drive the measuring sensors 7 to move, so that the measuring heads 8 at the detection ends symmetrically abut the outer side of the central tube to be measured, completing the measurement of the outer diameter. In specific implementation, to ensure that the two measuring heads 8 move synchronously toward each other, a synchronization valve can be used to control the two pneumatic cylinders 6. The synchronization valve can precisely adjust the intake and exhaust volumes of the two cylinders 6, so that the two measuring heads 8 remain synchronized during movement, with a displacement deviation of no more than ±0.1mm.

[0037] Cooperate Figure 5 and Figure 6 As shown, this device is also equipped with a jet cleaning mechanism, which is activated and deactivated during measurement by the measuring sensor 7 and performs jet cleaning on the surface of the central tube to be measured before measurement. Furthermore, an electrical box 101 and an air pump 102 are located within the mobile frame 1. The air pump 102 provides an air source for the jet cleaning mechanism. The measuring platform 2 is equipped with a human-machine operating mechanism 201 and an early warning module 202. The human-machine operating mechanism 201 cooperates with the electrical box 101 to provide electrical control of the central tube measurement mechanism (e.g., the displacement of the cylinder 6 and the rotation speed of the second motor 401). The early warning module 202 visually displays the eligibility of the central tube measurement results, specifically through an indicator light or display (e.g., an alarm is triggered if the outer diameter deviation exceeds ±0.05 mm).

[0038] In practice, the electrical box 101 can be sealed with an IP54 rating, effectively preventing dust and moisture from entering. It houses electrical components such as a power module and control circuit board, providing power and control signals for the various components of the device. The air pump 102, located adjacent to the electrical box 101, boasts a power output of 1.5kW and an air volume of at least 200L / min, ensuring a stable air supply for the jet cleaning mechanism. Furthermore, the air pump 102 can be bolted to the mobile frame 1 and equipped with shock-absorbing pads to reduce vibration and noise during operation.

[0039] The above-mentioned human-machine operating mechanism 201 and the early warning module 202 connected thereto are specifically arranged on one side of the measuring platform 2, and include a touch screen, operating buttons and indicator lights. The operator can conveniently set measurement parameters, start the measurement program, view measurement results, etc. through the touch screen. Its operating buttons include a start button, a stop button, an emergency stop button, etc. The buttons are waterproof and dustproof to ensure that they can still work normally in harsh environments. The indicator lights are used to display the operating status of the equipment, such as the power indicator light, the operation indicator light, the fault indicator light, etc. During specific use, when the measurement result exceeds the set range, the early warning module 202 will visually display whether the central tube measurement result is qualified by flashing a red indicator light and sounding a buzzer alarm. At the same time, a corresponding prompt message will pop up on the touch screen to inform the operator of the specific unqualified items and values.

[0040] The jet cleaning mechanism specifically includes a material barrel 501 installed in the middle of the measuring frame 5. The material barrel 501 is used for the central tube to be measured to pass horizontally. A plurality of air jet nozzles 502 are arranged around the inner side of the material barrel 501, so that the air jet nozzles 502 can be used to perform jet cleaning on the outer surface of the central tube to be measured.

[0041] Among them, a ventilator 10 is fixed on both sides of the measuring frame 5, and an air channel 503 is opened in the inner wall of both sides of the measuring frame 5. The air channel 503 connects the ventilator 10 and the air nozzle 502, and the ventilator 10 is connected to the air pump 102 through the air pipe 11. In specific implementation, a partition block 1001 is opened in the middle of the ventilator 10 to separate the air pipe 11 and the air channel 503, and a movable plate 9 is slidably installed in the ventilator 10, one end of the movable plate 9 is fixed to the measuring sensor 7, and a ventilation groove 901 is opened in the middle of the movable plate 9. When the ventilation groove 901 is located at the partition block 1001, it is used to connect the air pipe 11 and the air channel 503. Therefore, in conjunction with Figure 7 As shown, the movable plate 9 can cooperate with the measuring sensor 7 to form a linkage structure that moves accordingly, and use the position of the ventilation groove 901 to control whether the two ends of the ventilation cylinder 10 are connected, thereby controlling the connection between the air supply pipe 11 and the airway 503.

[0042] Working principle: When using the automatic measuring device for the size of the filter center tube, the cover on the measuring platform 2 can be opened, and the center tube to be measured can be horizontally fixed to the upper end surface of the base 3 through the fixing seat 4. Then, the first motor 303 is started to drive the screw 302 to rotate to control the sliding of the measuring frame 5, so that the center tube to be measured passes through the material barrel 501, so that the air nozzle 502 surrounds the center tube to be measured and faces its measured part.

[0043] Subsequently, the two cylinders 6 are started to operate synchronously to drive the two measuring sensors 7 to move synchronously toward each other, and the measuring head 8 is used to form a line contact with the outer wall of the central tube to be measured. The curved surface structure can eliminate the measurement deviation caused by the parallelism error of the measuring head 8, ensure that the measuring point is evenly stressed, and avoid affecting the accuracy due to local deformation.

[0044] At the same time, when using this equipment to measure the outer diameter of the central tube, the movement of the measuring sensor 7 is used to drive the movable plate 9 to move in the ventilation cylinder 10. During the whole process, the part of the movable plate 9 provided with the ventilation groove 901 is initially located in the cavity connected to the air supply pipe 11 in the ventilation cylinder 10. The movable plate 9 itself will cooperate with the partition block 1001 to form a complete block. As the movable plate 9 moves, the ventilation groove 901 will gradually move to the partition block 1001, thereby connecting the two separated cavities in the ventilation cylinder 10, so that the air pump 102 will pass through the air supply pipe 11, the ventilation groove 901, and the airway 503 to eject the air from the air nozzle 502, thereby cleaning the surface of the central tube to be measured, and using high-pressure airflow to remove oil and debris on the surface of the central tube to prevent impurities on the surface of the central tube from interfering with the measurement accuracy.

[0045] When the measuring sensor 7 moves to the point where the measuring head 8 contacts the surface of the central tube to be measured, it will further drive the movable plate 9 to move in the vent tube 10, causing the end position of the vent groove 901 to dock with the spacer 1001, so that the two sections of the internal cavity of the vent tube 10 are blocked again, preventing the airflow of the gas pipe 11 from being input into the air duct 503, and thus stopping the jet cleaning of the air nozzle 502, so as to avoid the air nozzle 502 spraying wind force and affecting the measurement accuracy when the outer diameter of the central tube is measured using the measuring head 8.

[0046] To sum up, the present invention can not only automatically measure the center tube and use line contact to replace the surface contact measurement in the prior art, effectively avoiding the measurement deviation caused by the parallelism error of the measuring head 8, but also use the measuring action to link the jet cleaning mechanism to achieve automatic cleaning, thereby avoiding the residual dirt on the surface of the center tube affecting the measurement results, and the overall use effect is good.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An automatic measuring device for the size of a filter central tube, characterized in that: include: A mobile frame (1), wherein a measuring platform (2) is fixed to the upper end surface of the mobile frame (1), and a central tube measuring mechanism for symmetrically abutting two sides of a central tube to be measured is provided on the measuring platform (2), and the central tube measuring mechanism includes a measuring sensor (7); A measuring head (8), the measuring head (8) being arranged at the measuring end of the measuring sensor (7), two measuring sensors (7) and two measuring heads (8) being arranged correspondingly, the measuring head (8) being used to symmetrically abut against the two side surfaces of the central tube to be measured to form outer diameter measurement, and the contact surface of the measuring head (8) being a cylindrical convex surface, being used to form linear contact with the outer wall of the central tube to be measured; An air jet cleaning mechanism, the air jet cleaning mechanism is used to open and close along with the activity process of the measuring sensor (7) during measurement, and to perform air jet cleaning on the surface of the central tube to be measured before measurement; A horizontal base (3) is fixed on the measuring table (2), one end of the base (3) is provided with a fixing seat (4) for fixing the central tube horizontally, the other end of the base (3) cooperates with the central tube measuring mechanism to measure the outer diameter of the central tube, and the fixing seat (4) is connected to a second motor (401) for driving the fixing seat (4) to rotate after fixing the central tube; The central tube measuring mechanism further comprises a measuring frame (5), the measuring frame (5) being slidably arranged on the base (3), and the two measuring sensors (7) being symmetrically arranged on both sides of the measuring frame (5); Two cylinders (6) are symmetrically fixed on the outside of both sides of the measuring frame (5), and the shafts of the two cylinders (6) are respectively fixed to the two measuring sensors (7) for driving the two measuring sensors (7) to move symmetrically toward each other; The jet cleaning mechanism comprises a material passing barrel (501) installed in the middle of the measuring frame (5), the material passing barrel (501) is used for allowing the central tube to be measured to pass horizontally, and a plurality of air jet nozzles (502) are arranged around the inner side of the material passing barrel (501); A ventilator (10) is fixed on both sides of the measuring frame (5), and an air passage (503) is opened in the inner wall of both sides of the measuring frame (5), the air passage (503) connects the ventilator (10) and the air nozzle (502), and the ventilator (10) is connected to the air pump (102) via an air pipe (11); A spacer (1001) is provided in the middle of the vent cylinder (10) for separating the gas pipe (11) and the air duct (503), and a movable plate (9) is slidably installed in the vent cylinder (10), one end of the movable plate (9) is fixed to the measuring sensor (7), forming a linkage structure that moves with the measuring sensor (7); a vent groove (901) is provided in the middle of the movable plate (9), and the vent groove (901) is used to connect the gas pipe (11) and the air duct (503) when it is located at the spacer (1001).

2. The automatic measuring device for the filter center tube size according to claim 1, characterized in that: An electrical box (101) and an air pump (102) are provided in the mobile frame (1); the air pump (102) is used to provide an air source for the jet cleaning mechanism.

3. The automatic measuring device for the filter center tube size according to claim 2, characterized in that: The measuring platform (2) is provided with a man-machine operating mechanism (201) and an early warning module (202). The man-machine operating mechanism (201) cooperates with the electrical box (101) to form electrical control of the central tube measuring mechanism, and the early warning module (202) is used to visually display whether the central tube measurement result is qualified.

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