A kind of defatted gauze moisture regain detection device

Abstract

The present application belongs to the technical field of moisture regain detection, and particularly relates to a kind of defatted gauze moisture regain detection devices, comprising: temperature insulation box, box door, controller, baffle, multiple vortex generators, hot air supply unit, backflow moisture absorption unit and in situ weighing unit;The box door is hinged at the opening of temperature insulation box, and the controller is fixed on the side wall of temperature insulation box;The baffle is arranged on the inside upper side of the temperature insulation box, and a plurality of strip air holes are formed in the surface of the baffle;Multiple vortex generators are fixed on the bottom of the baffle, and the vortex generator is arranged directly below the corresponding strip air hole, and the bottom of the vortex generator is provided with a clamping mechanism.The present application can break the stagnation air boundary layer on the surface of defatted gauze, speed up the sample drying speed, improve the moisture regain detection efficiency, and can realize hot air circulation dehumidification and reuse, reduce energy consumption, and at the same time, the defatted gauze can be weighed in situ.

Description

Technical Field

[0001] This invention belongs to the field of moisture regain detection technology, and in particular relates to a device for detecting the moisture regain of degreased gauze. Background Technology

[0002] Degreased gauze is widely used in medical wound dressings, surgical dressings, and other medical applications. During its production, it undergoes multiple processes such as warehousing, cutting, and processing to become medical dressings. Conducting moisture regain testing can prevent the gauze from becoming moldy or losing its tensile strength due to moisture, ensuring the stable and compliant quality of the finished products in subsequent processing.

[0003] Currently, when testing the moisture regain of degreased gauze, the gauze sample is usually placed in an oven to dry at a constant temperature. After being taken out and cooled at regular intervals, it is weighed multiple times until the mass difference between two adjacent weighings meets the constant weight requirement. The moisture regain value of the sample is then calculated based on this. However, during testing, the degreased gauze sample is placed on a wire mesh tray inside the oven and fixed by a pressure plate. When the hot air flows over the surface of the degreased gauze sample, it is affected by the viscous resistance of the degreased gauze surface and forms a slow-flowing air boundary layer that adheres tightly to the yarn surface. This air boundary layer not only hinders the high-temperature hot air from penetrating into the fabric, but also prevents the water vapor generated by evaporation inside the gauze fibers from being carried away by the airflow in time. In addition, the degreased gauze itself has a very strong moisture absorption capacity, which makes the drying of the degreased gauze take a long time, usually more than 1 hour, resulting in low testing efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a device for detecting the moisture regain of degreased gauze that can utilize airflow to form periodic vortices on the surface of the degreased gauze, causing the degreased gauze to oscillate, accelerating the removal of moisture, and improving detection efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a device for detecting the moisture regain of degreased gauze, comprising: The insulated chamber includes a door, a controller, a baffle, multiple vortex generators, a hot air supply unit, a reflux dehumidification unit, and an in-situ weighing unit; the door is hinged to the opening of the insulated chamber, and the controller is fixed to the side wall of the insulated chamber. The baffle is disposed on the upper side inside the insulation box, and the surface of the baffle is provided with multiple strip-shaped ventilation holes; Multiple vortex generators are fixed to the bottom of the baffle. The vortex generators are positioned directly below the corresponding strip-shaped ventilation holes. The bottom of the vortex generators is provided with a clamping mechanism for clamping the degreased gauze sample. The hot air supply unit is located on the top of the insulation box and is connected to the inside of the insulation box. The reflux moisture absorption unit is located on the back of the insulation box and is connected to the inside of the insulation box; The in-situ weighing unit is located on the lower side of the insulation box and is used to weigh the baffle.

[0006] In the above-mentioned degreased gauze moisture regain detection device, the clamping mechanism includes two symmetrical clamping plates and a torsion spring; the bottom of the vortex generator is provided with a groove, and both clamping plates are rotatably disposed inside the groove via pins; the torsion spring is fixed between the clamping plates and the groove wall.

[0007] In the aforementioned degreased gauze moisture regain detection device, the hot air supply unit includes an electric heater, a centrifugal hot air circulating fan, and a flow equalization perforated plate; the electric heater is fixed to the top of the insulation box; the centrifugal hot air circulating fan is fixed to the side wall of the electric heater, and the output end of the centrifugal hot air circulating fan is connected to the interior of the electric heater; the top of the insulation box has an air inlet hole that communicates with the interior of the electric heater; both the electric heater and the centrifugal hot air circulating fan are electrically connected to the controller; the flow equalization perforated plate is fixed inside the insulation box and located above the baffle.

[0008] In the aforementioned degreased gauze moisture regain detection device, the reflux moisture absorption unit includes a moisture absorption box, multiple reflux pipes, a support perforated plate, moisture-absorbing filler, a suction hopper, and an online monitoring component; the moisture absorption box is fixed to the back of the insulation box; multiple reflux pipes are fixed to the bottom of the moisture absorption box, and the reflux pipes are connected to the interior of the insulation box; the support perforated plate is fixed inside the moisture absorption box, and the moisture-absorbing filler is filled inside the moisture absorption box and located on the upper side of the support perforated plate; the suction hopper is fixedly connected to the suction end of the centrifugal hot air circulating fan, and the suction hopper is connected to the interior of the moisture absorption box; The online monitoring component is installed on the side wall of the desiccant chamber, and the controller controls the in-situ weighing unit to work based on the electrical signal fed back by the online monitoring component.

[0009] In the aforementioned degreased gauze moisture regain detection device, the online monitoring component includes a detection box, a dew point sensor, a T-tube, a branch pipe, a diversion valve, and a bend. The detection box is fixed to the back of the moisture absorption chamber. The dew point sensor is fixedly inserted into the side wall of the detection box. The T-tube is fixedly inserted into the bottom of the detection box, and both ends of the horizontal portion of the T-tube are sealed. The branch pipe is fixedly inserted into the wall of the return pipe, and the end of the branch pipe is fixedly connected to the diversion valve. The branch pipe is connected to the T-tube through the diversion valve. The bend is fixedly inserted into the top of the detection box and connected to the suction duct. The dew point sensor and the diversion valve are both electrically connected to the controller.

[0010] In the above-mentioned degreased gauze moisture regain detection device, two symmetrically arranged guide plates are provided below the vortex generator; a partition is fixed between the two guide plates, and multiple reflux holes are opened on the surface of the partition; the air inlet end of the reflux pipe is located on the lower side of the partition.

[0011] In the above-mentioned degreased gauze moisture regain detection device, the suction end of the centrifugal hot air circulating fan is fixedly connected to an air replenishment pipe; a pressure valve is fixed inside the air replenishment pipe.

[0012] In the aforementioned degreased gauze moisture regain detection device, the in-situ weighing unit includes a movable plate, a weighing sensor, a connecting plate, four weighing rods, a support frame, two support plates, and a drive assembly. The movable plate is positioned below the insulation chamber. The weighing sensor is fixed to the top of the movable plate and electrically connected to the controller. The connecting plate is positioned above the weighing sensor. The four weighing rods are respectively fixed at the four corners of the upper surface of the connecting plate, and the tops of the weighing rods slide through the bottom of the insulation chamber and are fixedly connected to the bottom of the baffle. The support frame is fixed to the inner wall of the insulation chamber, and both the inner wall of the support frame and the outer wall of the baffle are tapered slopes, with the outer wall of the baffle abutting against the inner wall of the support frame. The two support plates are respectively fixed to the bottom sides of the insulation chamber, and the drive assembly is positioned between the two support plates, pushing the movable plate upward.

[0013] In the aforementioned degreased gauze moisture regain detection device, the driving assembly includes a base plate, an electric push rod, multiple guide sleeves, and multiple guide rods; the base plate is fixed between two support plates; the electric push rod is fixed to the top of the base plate and electrically connected to a controller, and the movable plate is fixed to the top of the electric push rod; multiple guide sleeves are all fixed to the bottom of the movable plate; multiple guide rods are all fixed to the upper surface of the base plate, and the guide sleeves are slidably sleeved on the outside of the guide rods.

[0014] In the above-mentioned degreased gauze moisture regain detection device, the outer side of the weighing rod is provided with an isolation sleeve; the isolation sleeve is fixed to the bottom inner wall of the insulation box.

[0015] Compared with existing technologies, the present invention has the following advantages: 1. This invention, through its insulated chamber, chamber door, and hot air supply unit, allows high-temperature hot air to be introduced into the chamber. Combined with baffles, strip-shaped ventilation holes, a vortex generator, and a clamping mechanism, the degreased gauze sample can be clamped at the bottom of the vortex generator. The strip-shaped ventilation holes guide the airflow through the vortex generator, creating periodic vortices on both sides of the degreased gauze sample. These periodic vortices cause the sample to oscillate, minimizing the formation of a boundary layer on the gauze surface. This facilitates the penetration of the high-temperature hot airflow into the fiber gaps, improving heat transfer efficiency. Furthermore, it effectively carries away water vapor generated from evaporation within the fiber pores, preventing water vapor accumulation on the gauze surface and accelerating the evaporation rate of moisture inside the degreased gauze. This shortens the time required to dry the sample to constant weight, thus improving the efficiency of moisture regain detection.

[0016] 2. This invention, through its reflux moisture absorption unit, can adsorb and dry the moisture in the hot air, allowing the hot airflow to be recycled, reducing heat energy consumption, and improving temperature stability. Simultaneously, in conjunction with the online monitoring component, the hot airflow can be sampled and monitored during its flow. Based on the monitoring results, the degreased gauze sample is weighed using the in-situ weighing unit to determine whether the degreased gauze sample is dry. This further reduces wasted drying time while ensuring drying effectiveness, contributing to energy conservation and consumption reduction. Furthermore, the online monitoring component allows for continuous monitoring, reducing unnecessary weighing work by the in-situ weighing unit.

[0017] 3. The present invention, through the in-situ weighing unit, can weigh the degreased gauze in situ after the degreased gauze sample is installed and during the drying process, without having to remove the degreased gauze for weighing. This minimizes the risk of the degreased gauze reabsorbing moisture due to its high hygroscopic properties, thus affecting the accuracy of the moisture regain test. It also reduces the weighing steps and improves the ease of use of the equipment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a degreased gauze moisture regain detection device provided by the present invention; Figure 2 This is a schematic diagram of the back structure provided by the present invention; Figure 3 This is a schematic diagram of the internal structure of the insulated box provided by the present invention; Figure 4 This is a schematic diagram of the bottom structure of the vortex generator provided by the present invention; Figure 5 This is a cross-sectional structural schematic diagram of the insulated box provided by the present invention; Figure 6 This is a schematic diagram of the connection structure between the moisture absorption box and the centrifugal hot air circulating fan provided by the present invention; Figure 7 This is a schematic diagram of the internal structure of the moisture-absorbing box provided by the present invention.

[0019] In the diagram: 1. Insulation box; 2. Box door; 3. Controller; 4. Baffle; 5. Strip vent; 6. Vortex generator; 7. Clamping mechanism; 71. Clamping plate; 72. Groove; 73. Torsion spring; 8. Hot air supply unit; 81. Electric heater; 82. Centrifugal hot air circulating fan; 83. Air inlet; 84. Flow equalization plate; 9. Return moisture absorption unit; 91. Moisture absorption box; 92. Return pipe; 93. Support plate; 94. Moisture absorption packing; 95. Suction hopper; 10. In-situ weighing unit; 101. Movable plate; 102. 103. Weighing sensor; 104. Connecting plate; 105. Weighing rod; 106. Support frame; 107. Support plate; 11. Online monitoring component; 118. Detection box; 119. Dew point sensor; 110. T-tube; 111. Branch pipe; 112. Diverter valve; 113. Bend; 12. Guide plate; 13. Baffle plate; 14. Return hole; 15. Air supply pipe; 16. Pressure valve; 170. Drive component; 171. Base plate; 172. Electric push rod; 173. Guide sleeve; 174. Guide rod; 18. Isolation sleeve. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] like Figures 1-5 As shown, a device for detecting the moisture regain of degreased gauze includes an insulated chamber 1 and a door 2 hinged to the opening of the insulated chamber 1. A controller 3 is fixed to the wall of the insulated chamber 1. The device also includes a baffle 4, multiple vortex generators 6, and a hot air supply unit 8. The baffle 4 is located on the upper side inside the insulated chamber 1, and multiple strip-shaped ventilation holes 5 are opened on the surface of the baffle 4. The multiple vortex generators 6 are all fixed to the bottom of the baffle 4, and the vortex generators 6 are located directly below the corresponding strip-shaped ventilation holes 5. A clamping mechanism 7 is provided at the bottom of the vortex generators 6. The hot air supply unit 8 is located on the top of the insulated chamber 1 and is connected to the inside of the insulated chamber 1. The cross-section of the vortex generator 6 is trapezoidal, with a top width of 30 mm, a bottom width of 15 mm, and a length of 110 mm. The length of the strip-shaped ventilation hole 5 is 120 mm and the width is 34 mm. The distance between two adjacent vortex generators 6 is greater than 80 mm.

[0022] The clamping mechanism 7 includes two symmetrical clamping plates 71. The bottom of the vortex generator 6 is provided with a groove 72. Both clamping plates 71 are rotatably set inside the groove 72 by a pin. A torsion spring 73 is fixed between the clamping plate 71 and the groove wall of the groove 72. The length of the clamping plate 71 is 105mm.

[0023] The hot air supply unit 8 includes an electric heater 81 fixed to the top of the insulation box 1. A centrifugal hot air circulating fan 82 is fixed to the side wall of the electric heater 81. The output end of the centrifugal hot air circulating fan 82 is connected to the interior of the electric heater 81. An air inlet 83 connected to the interior of the electric heater 81 is opened on the top of the insulation box 1. A flow equalization plate 84 is fixed inside the insulation box 1 above the baffle 4. Both the electric heater 81 and the centrifugal hot air circulating fan 82 are electrically connected to the controller 3. The airflow velocity output by the hot air supply unit 8 is 2.0 to 3.0 m / s, and the temperature is 100℃ to 105℃ (the thermal decomposition temperature of cotton fiber is above 150℃). The airflow velocity and temperature can also be set by the controller 3 according to the actual testing requirements.

[0024] During actual testing, the degreased gauze sample is clamped below the vortex generator 6 by the clamping mechanism 7. The hot air supply unit 8 delivers hot air to the baffle 4. The hot air flows downward through the rectifier hole of the strip-shaped ventilation hole 5. When the air flows through the vortex generator 6, it reaches the windward side of the vortex generator 6 and cannot pass directly due to the obstruction of the vortex generator 6. Instead, it flows downward along the two side walls of the vortex generator 6. The separated airflow continuously converges and is drawn in at the low pressure area on the back side of the vortex generator 6, thus forming a regular vortex by alternately falling off both sides of the degreased gauze. Because the lower end of the degreased gauze is not fixed, the periodic vortex continuously applies alternating aerodynamic thrust to both sides of the degreased gauze, causing it to oscillate back and forth in small amplitudes. This disturbs and washes away the stagnant airflow on the surface of the degreased gauze, preventing the formation of a stable stagnant air boundary layer on the surface of the degreased gauze. This makes it easier for hot airflow to penetrate into the fiber gaps of the degreased gauze, and the water vapor evaporating in the fiber pores is also more easily carried away by the airflow. This helps to improve the drying efficiency of the moisture inside the fiber gaps of the degreased gauze, shorten the overall drying time, and improve the detection efficiency of moisture regain.

[0025] like Figure 2 , Figure 6 and Figure 7As shown, further in this embodiment, the device also includes a reflux moisture absorption unit 9, which is disposed on the back of the insulation box 1 and communicates with the interior of the insulation box 1. The reflux moisture absorption unit 9 includes a moisture absorption box 91 fixed to the back of the insulation box 1. Multiple reflux pipes 92 are fixed to the bottom of the moisture absorption box 91, and the reflux pipes 92 communicate with the interior of the insulation box 1. A support perforated plate 93 is fixed inside the moisture absorption box 91, and the position of the moisture absorption box 91 above the support perforated plate 93 is filled with moisture-absorbing material. The wet packing 94 and the suction end of the centrifugal hot air circulating fan 82 are fixedly connected to the suction hopper 95. The suction hopper 95 is connected to the interior of the desiccant box 91. The desiccant 94 is made of 4A type molecular sieve particles with a particle size of 3-5mm, or spherical silica gel desiccant with a particle size of 4-6mm. The suction hopper 95, the top of the desiccant box 91, and the suction end of the centrifugal hot air circulating fan 82 are all detachable for easy replacement of the desiccant 94. The desiccant box 91 is made of heat insulation material.

[0026] In actual testing, in this embodiment, the airflow entering the insulation box 1 will be discharged through each return pipe 92 on the lower side of the insulation box 1. The discharged airflow enters the moisture absorption box 91. The moisture absorption packing 94 inside the moisture absorption box 91 will adsorb the moisture in the airflow, thereby drying the hot airflow. The dried airflow is then drawn back into the centrifugal hot air circulation fan 82 through the suction duct 95, so that the hot airflow can be recycled, reducing heat energy consumption and improving the stability of the airflow temperature.

[0027] like Figure 6 As shown, further, in this embodiment, an online monitoring component 11 is installed on the side wall of the desiccant box 91. The controller 3 controls the in-situ weighing unit 10 to work according to the electrical signal fed back by the online monitoring component 11. The online monitoring component 11 includes a detection box 111 fixed on the back of the desiccant box 91. A dew point sensor 112 is fixedly installed on the side wall of the detection box 111. A T-shaped tube 113 is fixedly inserted at the bottom of the detection box 111. Both ends of the horizontal part of the T-shaped tube 113 are sealed. A branch pipe 114 is fixedly inserted into the wall of the return pipe 92. A diversion valve 115 is fixedly connected to the end of the branch pipe 114. The branch pipe 114 is connected to the T-shaped tube 113 through the diversion valve 115. A bent pipe 116 connected to the suction duct 95 is inserted into the top of the detection box 111. The dew point sensor 112 and the diversion valve 115 are both electrically connected to the controller 3. The dew point sensor 112 adopts a high-temperature capacitive dew point probe.

[0028] In actual testing, in this embodiment, the controller 3 controls each diversion valve 115 to open. Since the moisture-absorbing packing 94 in the moisture-absorbing box 91 will obstruct the gas flow, and the resistance to airflow in the detection box 111 is small, after the diversion valve 115 is opened, some airflow will enter the detection box 111 through the branch pipe 114, T-shaped pipe 113, and diversion valve 115. The diversion valve 115 is closed after 10 seconds of opening. At this time, the airflow will not continue to pass through the detection box 111. After waiting for 1 minute, the dew point temperature value of the circulating hot air is collected in real time by the dew point sensor 112 on the side wall of the detection box 111, and the electrical signal is transmitted to the controller 3, so as to determine the dryness of the airflow. When the airflow is detected to reach the drying standard of dew point temperature ≤ -20℃, the in-situ weighing unit 10 is activated to perform a weighing operation. After three consecutive weighings, if the weight change of the degreased gauze sample is less than 0.002g, it indicates that the degreased gauze is dried and no further drying is required. Since the online monitoring component 11 can perform airflow temperature and humidity sampling and detection without stopping the machine, the in-situ weighing unit 10 will only be activated to perform weighing operation when the circulating airflow is detected to meet the preset drying dew point conditions. Therefore, it can avoid equipment damage and waste of detection time caused by frequent invalid weighing. At the same time, during the detection process, if the dew point sensor 112 detects that the humidity has not reached the preset dew point standard for three consecutive times and the dew point difference is less than 1℃, it indicates that the moisture-absorbing filler 94 in the moisture absorption box 91 is saturated and can no longer absorb moisture. The controller 3 reminds personnel to replace or regenerate the moisture-absorbing filler 94 through the audible and visual alarm module.

[0029] like Figure 5 As shown, in this embodiment, two symmetrically arranged guide plates 12 are provided below the vortex generator 6, and a partition 13 is fixed between the two guide plates 12. Multiple return holes 14 are opened on the surface of the partition 13, and the air inlet end of the return pipe 92 is located on the lower side of the partition 13.

[0030] In actual testing, this embodiment uses the guide plate 12 to guide the airflow, preventing it from spreading and forming local vortex dead zones. The airflow is discharged through the return pipe 92 via the return hole 14 on the baffle plate 13. The baffle plate 13, together with the return hole 14, can perform secondary uniform rectification of the airflow, disperse local high-pressure turbulence, and allow the airflow at each position to be discharged as smoothly as possible.

[0031] like Figure 6 As shown, in this embodiment, the intake end of the centrifugal hot air circulating fan 82 is fixedly connected to an air supply pipe 15, and a pressure valve 16 is fixed inside the air supply pipe 15.

[0032] In actual testing, in this embodiment, since there is resistance when the airflow passes through the moisture-absorbing packing 94, and the interior of the moisture-absorbing packing 94 may be obstructed as it absorbs moisture, when the airflow cannot pass through the interior of the moisture-absorbing packing 94 smoothly, under the action of negative pressure, the external airflow opens the pressure valve 16 and enters the interior of the centrifugal hot air circulating fan 82 through the air supply pipe 15, preventing the centrifugal hot air circulating fan 82 from being damaged due to the inability of airflow.

[0033] like Figure 1 and Figure 5 As shown, further in this embodiment, the device also includes an in-situ weighing unit 10, which is disposed on the lower side of the insulation box 1 and used to weigh the baffle 4. The in-situ weighing unit 10 includes a movable plate 101 disposed below the insulation box 1. A weighing sensor 102 electrically connected to the controller 3 is fixed on the top of the movable plate 101. A connecting plate 103 is disposed above the weighing sensor 102, and weighing rods are fixed at the four corners of the upper surface of the connecting plate 103. 104, and the top of the weighing rod 104 slides through the bottom of the insulation box 1 and is fixedly connected to the bottom of the baffle 4. A support frame 105 is fixed on the inner side wall of the insulation box 1. The inner side wall of the support frame 105 and the outer side wall of the baffle 4 are both tapered slopes. The outer side wall of the baffle 4 abuts against the inner side wall of the support frame 105. Support plates 106 are fixed on both sides of the bottom of the insulation box 1. A drive assembly 17 for pushing the movable plate 101 upward is provided between the two support plates 106.

[0034] In actual testing, when weighing the degreased gauze sample, the controller 3 controls the drive assembly 17 to push the movable plate 101 upward. The movable plate 101 then pushes the baffle 4 upward through the weighing sensor 102, the connecting plate 103, and the weighing rod 104. Since the degreased gauze sample is fixed at the bottom of the vortex generator 6 at the baffle 4, the degreased gauze sample can be weighed. During the drying process, it is not necessary to remove the degreased gauze for weighing, which prevents the degreased gauze from absorbing moisture again due to its high hygroscopicity and affecting the weighing accuracy. Secondly, during normal drying, the support frame 105 abuts against the conical inclined sidewall of the baffle 4, which can prevent airflow from escaping between the support frame 105 and the baffle 4. At the same time, the support frame 105 can support the baffle 4, so the weighing sensor 102 does not need to be under constant stress.

[0035] like Figure 5 As shown, further in this embodiment, the drive assembly 17 includes a base plate 171 fixed between two support plates 106, and an electric push rod 172 electrically connected to the controller 3 is fixed on the top of the base plate 171. A movable plate 101 is fixed on the top of the electric push rod 172, and a plurality of guide sleeves 173 are fixed on the bottom of the movable plate 101. A plurality of guide rods 174 are fixed on the upper surface of the base plate 171, and the guide sleeves 173 are slidably sleeved on the outside of the guide rods 174.

[0036] In actual use, the electric push rod 172 works to push the movable plate 101 up by 4cm, so that the weighing sensor 102 can abut against the bottom of the connecting plate 103 and push the baffle 4 away from the support frame 105, thereby enabling the degreased gauze to be weighed smoothly. With the cooperation of the guide sleeve 173 and the guide rod 174, the stability of the vertical movement of the movable plate 101 can be improved.

[0037] like Figure 5 As shown, in this embodiment, the outer side of the weighing rod 104 is slidably fitted with an isolation sleeve 18, and the isolation sleeve 18 is fixed to the bottom inner wall of the insulation box 1. The distance between the top of the isolation sleeve 18 and the baffle 4 is about 1 mm.

[0038] In actual testing, this embodiment uses the isolation sleeve 18 to enclose the gap at the sliding connection between the weighing rod 104 and the insulation box 1, preventing hot air from escaping from the gap.

[0039] The operation process of this invention is as follows: Take multiple degreased gauze samples with a width of 100mm and a length of 200mm, open the box door 2 and open the clamping plate 71 so that the top of the degreased gauze sample is between the clamping plates 71. After releasing the clamping plates 71, under the action of the torsion spring 73, the two clamping plates 71 can stably clamp and fix the degreased gauze sample. Then close the box door 2 and start the controller 3. After the controller 3 is started, it will control the electric push rod 172 to push the movable plate 101 up by 4cm. At this time, the weighing sensor 102 pushes the baffle 4 up through the connecting plate 103 and the weighing rod 104. Since the degreased gauze is fixed to the bottom of the baffle 4 through the vortex generator 6, the weighing sensor 102 can weigh the weight of the degreased gauze (the weighing sensor 102 has already tare the weight of the baffle 4, the weighing rod 104, and the connecting plate 103), so that the total weight of the degreased gauze sample can be obtained. After the weighing is completed, the electric push rod 172 drives the movable plate 101 to drive the weighing sensor 102 to reset. Subsequently, the controller 3 controls the operation of the electric heater 81 and the centrifugal hot air circulating fan 82. The electric heater 81 can heat the air. The heated airflow enters the interior of the insulation box 1 through the air inlet 83 and flows through the flow equalization plate 84 and the strip-shaped ventilation hole 5 and the vortex generator 6. Under the action of the vortex generator 6, the airflow forms a periodic vortex on both sides of the degreased gauze sample, driving the degreased gauze sample to swing. The hot airflow flowing through the degreased gauze sample can carry the moisture inside the degreased gauze and discharge it through the return hole 14 and the return pipe 92. The hot airflow discharged through the return pipe 92 enters the moisture absorption box 91. Under the adsorption of the moisture absorption packing 94, the hot airflow is dried. The dried hot airflow is re-drawn into the centrifugal hot air circulation fan 82 and returned to the insulation box 1. Through the continuous circulation of the hot airflow and the continuous drying of the airflow by the moisture absorption packing 94, the degreased gauze can be gradually dried. During the drying process of the degreased gauze, after 20 minutes of drying, the controller 3 activates the diversion valve 115 every 2 minutes and controls the dew point sensor 112 to detect the dew point of the gas remaining inside the detection box 111. When the dew point temperature is ≤-20℃, the controller 3 controls the heater 81 and the centrifugal hot air circulating fan 82 to stop working, and then starts the in-situ weighing unit 10 to weigh the degreased gauze again. After the weighing is completed, the controller 3 controls the heater 81 and the centrifugal hot air circulating fan 82 to resume working. When the dew point sensor 112 detects the dew point temperature ≤-20℃ for 3 consecutive times, and the weight change measured by the in-situ weighing unit 10 is less than 0.002g, it indicates that the drying of the degreased gauze is complete. At this time, the weight of the last weighing is taken as the weight of the degreased gauze after drying, and then according to... The formula (R is the moisture regain; G is the wet weight of the degreased gauze sample before drying, in g; G0 is the weight of the degreased gauze sample after drying, in g) is used by controller 3 to automatically calculate the moisture regain of the degreased gauze.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for detecting the moisture regain of degreased gauze, characterized in that, include: The insulated box (1), the door (2), the controller (3), the baffle (4), multiple vortex generators (6), the hot air supply unit (8), the reflux moisture absorption unit (9) and the in-situ weighing unit (10); the door (2) is hinged to the opening of the insulated box (1), and the controller (3) is fixed to the side wall of the insulated box (1); The baffle (4) is located on the upper side inside the insulation box (1), and the surface of the baffle (4) is provided with a plurality of strip-shaped ventilation holes (5). Multiple vortex generators (6) are fixed at the bottom of the baffle (4), and the vortex generators (6) are positioned directly below the corresponding strip-shaped ventilation holes (5); the bottom of the vortex generators (6) is provided with a clamping mechanism (7), which is used to clamp the degreased gauze sample. The hot air supply unit (8) is located on the top of the insulation box (1) and is connected to the inside of the insulation box (1); the reflux moisture absorption unit (9) is located on the back of the insulation box (1) and is connected to the inside of the insulation box (1); the in-situ weighing unit (10) is located on the lower side of the insulation box (1) and is used to weigh the baffle (4).

2. The device for detecting the moisture regain of degreased gauze according to claim 1, characterized in that, The clamping mechanism (7) includes two symmetrical clamping plates (71) and a torsion spring (73); the bottom of the vortex generator (6) is provided with a groove (72), and the two clamping plates (71) are rotatably disposed on the inner side of the groove (72) by means of a pin; the torsion spring (73) is fixed between the clamping plate (71) and the groove wall of the groove (72).

3. The device for detecting the moisture regain of degreased gauze according to claim 1, characterized in that, The hot air supply unit (8) includes an electric heater (81), a centrifugal hot air circulating fan (82), and a flow equalization plate (84); the electric heater (81) is fixed on the top of the insulation box (1); the centrifugal hot air circulating fan (82) is fixed on the side wall of the electric heater (81), the output end of the centrifugal hot air circulating fan (82) is connected to the inside of the electric heater (81), the top of the insulation box (1) is provided with an air inlet (83) connected to the inside of the electric heater (81), and both the electric heater (81) and the centrifugal hot air circulating fan (82) are electrically connected to the controller (3); the flow equalization plate (84) is fixed inside the insulation box (1) and located above the baffle (4).

4. The device for detecting the moisture regain of degreased gauze according to claim 3, characterized in that, The reflux desiccant unit (9) includes a desiccant box (91), multiple reflux pipes (92), a support orifice plate (93), a desiccant packing (94), a suction hopper (95), and an online monitoring component (11); the desiccant box (91) is fixed to the back of the insulation box (1); multiple reflux pipes (92) are fixed to the bottom of the desiccant box (91), and the reflux pipes (92) are connected to the interior of the insulation box (1); the support orifice plate (93) is fixed inside the desiccant box (91), and the desiccant packing (94) is filled inside the desiccant box (91) and located on the upper side of the support orifice plate (93); the suction hopper (95) is fixedly connected to the suction end of the centrifugal hot air circulating fan (82), and the suction hopper (95) is connected to the interior of the desiccant box (91); The online monitoring component (11) is installed on the side wall of the moisture absorption box (91), and the controller (3) controls the in-situ weighing unit (10) to work according to the electrical signal fed back by the online monitoring component (11).

5. The device for detecting the moisture regain of degreased gauze according to claim 4, characterized in that, The online monitoring component (11) includes a detection box (111), a dew point sensor (112), a T-tube (113), a branch pipe (114), a diversion valve (115), and a bend (116); the detection box (111) is fixed to the back of the desiccant box (91); the dew point sensor (112) is fixedly inserted into the side wall of the detection box (111); the T-tube (113) is fixedly inserted into the bottom of the detection box (111), and the horizontal part of the T-tube (113) has two... All ends are sealed; the branch pipe (114) is fixedly inserted into the wall of the return pipe (92), the end of the branch pipe (114) is fixedly connected to the diversion valve (115), and the branch pipe (114) is connected to the T-shaped pipe (113) through the diversion valve (115); the bend pipe (116) is fixedly inserted into the top of the detection box (111) and connected to the suction hopper (95); the dew point sensor (112) and the diversion valve (115) are both electrically connected to the controller (3).

6. The device for detecting the moisture regain of degreased gauze according to claim 4, characterized in that, Two symmetrically arranged guide plates (12) are provided below the vortex generator (6); a partition plate (13) is fixed between the two guide plates (12), and a plurality of return holes (14) are opened on the surface of the partition plate (13); the air inlet end of the return pipe (92) is located on the lower side of the partition plate (13).

7. The device for detecting the moisture regain of degreased gauze according to claim 4, characterized in that, The centrifugal hot air circulating fan (82) has a fixed air supply pipe (15) inserted into its suction end; a pressure valve (16) is fixed inside the air supply pipe (15).

8. The device for detecting the moisture regain of degreased gauze according to claim 1, characterized in that, The in-situ weighing unit (10) includes a movable plate (101), a weighing sensor (102), a connecting plate (103), four weighing rods (104), a support frame (105), two support plates (106), and a drive assembly (17); the movable plate (101) is located below the insulated box (1); the weighing sensor (102) is fixed to the top of the movable plate (101) and electrically connected to the controller (3); the connecting plate (103) is located above the weighing sensor (102); the four weighing rods (104) are fixed at the four corners of the upper surface of the connecting plate (103). The top of the weighing rod (104) slides through the bottom of the insulation box (1) and is fixedly connected to the bottom of the baffle (4). The support frame (105) is fixed to the inner wall of the insulation box (1). The inner wall of the support frame (105) and the outer wall of the baffle (4) are both conical inclined. The outer wall of the baffle (4) abuts against the inner wall of the support frame (105). The two support plates (106) are fixed on the bottom sides of the insulation box (1). The drive assembly (17) is disposed between two support plates (106), and the drive assembly (17) pushes the movable plate (101) upward.

9. The device for detecting the moisture regain of degreased gauze according to claim 8, characterized in that, The drive assembly (17) includes a base plate (171), an electric push rod (172), multiple guide sleeves (173), and multiple guide rods (174); the base plate (171) is fixed between two support plates (106); the electric push rod (172) is fixed on the top of the base plate (171) and electrically connected to the controller (3); the movable plate (101) is fixed on the top of the electric push rod (172); the multiple guide sleeves (173) are all fixed on the bottom of the movable plate (101); the multiple guide rods (174) are all fixed on the upper surface of the base plate (171), and the guide sleeves (173) are slidably sleeved on the outside of the guide rods (174).

10. The device for detecting the moisture regain of degreased gauze according to claim 8, characterized in that, An isolation sleeve (18) is slidably fitted on the outer side of the weighing rod (104); the isolation sleeve (18) is fixed to the bottom inner wall of the insulated box (1).

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