Long fiber component detection device

Abstract

The utility model discloses a long fiber component detection device which comprises a sample groove structure used for accommodating a detected sample of a cotton fiber pulp board and water and diluting the detected sample to a preset concentration; a plurality of air inlets are formed in the bottom of the sample groove structure at intervals in the circumferential direction of the sample groove structure, and the air flow dispersion structure is communicated with the air inlets; the vibration structure is mounted at the bottom of the sample groove structure in a manner of vibrating up and down; the sieve plate is installed in the sample groove structure and located between the air inlet and the vibration structure, and a plurality of sieve seams are distributed in the sieve plate at intervals. According to the device disclosed by the utility model, medium and short fibers can pass through the sieve seams, and long fibers are intercepted on the sieve plate, so that the purpose of separating long fiber components from medium and short fiber components is realized, and the quantitative detection of the long fiber components in the cotton fiber pulp board can be realized by calculating the weight ratio of the long fiber components in a detected sample.

Description

TECHNICAL FIELD

[0001] The utility model relates to cotton fiber pulp board quality analysis equipment technical field, and particularly relates to a long fiber component detection device. BACKGROUND

[0002] Cotton fiber pulp board is made by using a paper machine to dry pulp after cotton fiber raw material is steamed and bleached, and is used by banknote paper production enterprises. The length of cotton fiber in cotton fiber pulp board directly affects the quality of prepared banknote paper.

[0003] At present, the main detection index of cotton fiber pulp board is the average length of fibers, there is no quantitative detection index of long fiber components, and there is no related detection instrument. The method for detecting the average length of fibers mainly uses a microscope method and a fiber analyzer for detection.

[0004] Among them, the microscope method can only detect the average fiber length of cotton fiber pulp board and cannot quantitatively detect the content of long fiber components. The detection length range of the fiber analyzer is below 7mm, and for a certain amount of overlong fibers existing in the cotton fiber pulp board, the fiber length is above 10mm, so the fiber analyzer cannot be used for detection, and therefore the content of long fiber components in the cotton fiber pulp board cannot be quantitatively detected. SUMMARY

[0005] The utility model aims at providing a long fiber component detection device to solve the technical problem that the content of long fiber components in cotton fiber pulp board cannot be quantitatively detected at present.

[0006] The above-mentioned purpose of the utility model can be realized by adopting the following technical scheme:

[0007] The utility model provides a long fiber component detection device, which comprises: a sample tank structure for containing a detected sample of cotton fiber pulp board and water to dilute the detected sample to a preset concentration; an airflow dispersion structure, a plurality of air inlets are arranged at the bottom of the sample tank structure in a circumferential direction, and the airflow dispersion structure is in communication with the plurality of air inlets; a vibration structure which is installed on the bottom of the sample tank structure and can vibrate up and down; a sieve plate which is installed in the sample tank structure and located between the air inlets and the vibration structure, and a plurality of sieve slots are arranged on the sieve plate in a spaced manner.

[0008] In the embodiment of the utility model, the length of the sieve slot is 90mm-110mm, and the width of the sieve slot is 0.2mm-0.4mm.

[0009] In the embodiment of the utility model, the length of the sieve slot is 100mm, and the width of the sieve slot is 0.3mm±0.005mm.

[0010] The utility model discloses an implementation manner of long fiber component detection device, long fiber component detection device, it includes base, sample groove structure and vibration drive structure, vibration drive structure installs in the base, and the vibration drive structure is located the below of sample groove structure.

[0011] The utility model discloses an implementation manner of long fiber component detection device, long fiber component detection device, it includes base, sample groove structure and vibration drive structure, vibration drive structure installs in the base, and the vibration drive structure is located the below of sample groove structure.

[0012] The utility model discloses an implementation manner of long fiber component detection device, long fiber component detection device, it includes base, sample groove structure and vibration drive structure, vibration drive structure installs in the base, and the vibration drive structure is located the below of sample groove structure.

[0013] The utility model discloses an implementation manner of long fiber component detection device, long fiber component detection device, it includes base, sample groove structure and vibration drive structure, vibration drive structure installs in the base, and the vibration drive structure is located the below of sample groove structure.

[0014] The utility model discloses an implementation manner of long fiber component detection device, long fiber component detection device, it includes base, sample groove structure and vibration drive structure, vibration drive structure installs in the base, and the vibration drive structure is located the below of sample groove structure.

[0015] The utility model discloses an implementation manner of long fiber component detection device, long fiber component detection device, it includes base, sample groove structure and vibration drive structure, vibration drive structure installs in the base, and the vibration drive structure is located the below of sample groove structure.

[0016] The utility model discloses an implementation manner of long fiber component detection device, long fiber component detection device, it includes base, sample groove structure and vibration drive structure, vibration drive structure installs in the base, and the vibration drive structure is located the below of sample groove structure.

[0017] The utility model discloses an implementation manner of long fiber component detection device, long fiber component detection device, it includes base, sample groove structure and vibration drive structure, vibration drive structure installs in the base, and the vibration drive structure is located the below of sample groove structure.

[0018] The long fiber component detection device of the utility model, the sample to be detected is diluted by water in the sample groove structure, gas is filled into the sample groove structure from multiple air inlets to form airflow flowing from bottom to top, so as to disperse the fiber component above the sieve plate, and the vibration structure vibrates up and down below the sieve plate, wherein upward vibration of the mixed solution in the sample groove structure can form a backwash effect to disperse the fiber component attached to the sieve plate, so as to also play a role in dispersing the fiber component, wherein downward vibration of the mixed solution in the sample groove structure can form a suction effect to assist the medium and short fibers in the dispersed fiber component above the sieve plate to pass through the sieve seam, and the long fibers are intercepted on the sieve plate, so that the purpose of separating the long fiber component from the medium and short fiber component is realized, and then by calculating the weight proportion of the long fiber component in the sample to be detected, quantitative detection of the long fiber component in the cotton fiber pulp board can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the premise of the drawings.

[0020] Figure 1 It is a structural schematic view of the long fiber component detection device in the utility model.

[0021] Figure 2 It is a structural schematic view of the sieve plate in the utility model.

[0022] Figure 3 It is a structural schematic view of the vibration structure in the utility model.

[0023] Figure 4 It is a structural schematic view of the vibration pad vibrating upward in the utility model.

[0024] In the drawing:

[0025] 1, sample groove structure; 11, main groove body; 12, bottom groove body;

[0026] 2, air inlet;

[0027] 3, vibration structure; 31, vibration pad; 32, eccentric wheel; 33, base; 34, rotating shaft;

[0028] 4, sieve plate; 41, sieve seam;

[0029] 5, water supplementing structure; 51, water supplementing pipeline; 52, water supplementing flowmeter;

[0030] 6, spraying structure;

[0031] 7, overflow structure; 71, overflow tank; 72, discharge tank; 73, overflow port; 74, overflow partition plate; 75, discharge port; 76, overflow drain; 77, discharge valve. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] As shown in the drawings, Figure 1 The present application provides a long fiber component detection device, comprising: a sample tank structure 1 for containing a detected sample of cotton fiber pulp board and water to dilute the detected sample to a preset concentration; an airflow dispersion structure, the bottom of the sample tank structure 1 is arranged with a plurality of air inlets 2 in the circumferential direction, and the airflow dispersion structure is in communication with the plurality of air inlets 2; a vibration structure 3 which is installed on the bottom of the sample tank structure 1 and can vibrate up and down; a sieve plate 4 which is installed in the sample tank structure 1 and located between the air inlet 2 and the vibration structure 3, and a plurality of sieve slots 41 are arranged on the sieve plate 4.

[0034] As shown in the drawings, Figure 1 The long fiber component detection device of the present application, the detected sample is diluted by water in the sample tank structure 1, and gas is filled into the sample tank structure 1 from the plurality of air inlets 2 to form an airflow flowing from bottom to top, thereby dispersing the fiber components above the sieve plate 4, and the vibration structure 3 vibrates up and down below the sieve plate 4, wherein the upward vibration of the mixed liquid in the sample tank structure 1 can form a backwash effect to disperse the fiber components attached to the sieve plate 4, thereby also playing a role in dispersing the fiber components, and the downward vibration of the mixed liquid in the sample tank structure 1 can form a suction effect to assist the medium and short fibers in the dispersed fiber components above the sieve plate 4 to pass through the sieve slots 41, and the long fibers are intercepted on the sieve plate 4, thereby achieving the purpose of separating the long fiber component from the medium and short fiber component, and then by calculating the weight proportion of the long fiber component in the detected sample, the quantitative detection of the long fiber component in the cotton fiber pulp board can be realized.

[0035] Specifically, as shown in the drawings, Figure 1As shown, the sample tank structure 1 can be a split structure as in the present embodiment, including a main tank body 11 and a bottom tank body 12, the bottom of the main tank body 11 is detachably and sealingly connected to the top of the bottom tank body 12, the sieve plate 4 is installed on the top of the bottom tank body 12, and the vibration structure 3 is installed on the bottom of the bottom tank body 12. After the main tank body 11 is sealingly connected to the bottom tank body 12, a cavity is formed, and then the sample to be detected and water are poured into the cavity, so that the sample to be detected is diluted to a lower concentration by the water; after the separation is completed, the long fiber components retained above the sieve plate 4 can be taken out by detaching the main tank body 11 from the bottom tank body 12. One side edge of the bottom of the main tank body 11 is hingedly connected to one side edge of the top of the bottom tank body 12, and the bottom of the main tank body 11 and the top of the bottom tank body 12 are provided with a plurality of matched connecting buckles, the bottom of the main tank body 11 is connected and buckled to the bottom tank body 12 through the plurality of connecting buckles, and a sealing ring is arranged between the bottom of the main tank body 11 and the top of the bottom tank body 12 to ensure the sealing property.

[0036] As shown in Figure 1 , the air flow dispersion structure includes a gas supply main pipeline and a plurality of branch gas supply pipelines, and the plurality of branch gas supply pipelines are connected between the gas supply main pipeline and the plurality of air inlets 2. The plurality of air inlets 2 are arranged close to the sieve plate 4, and the spacing between the plurality of air inlets 2 and the sieve plate 4 in the height direction is preferably not the same, so that the gas filled into the sample tank structure 1 from different air inlets 2 can disperse the fiber components at different heights above the sieve plate 4. Of course, the spacing between the plurality of air inlets 2 and the sieve plate 4 in the height direction can also be the same. Specifically, the plurality of air inlets 2 are arranged on the bottom of the main tank body 11. An air inlet valve for controlling air inlet is arranged on the gas supply main pipeline.

[0037] As shown in Figure 2 , the length and width of the sieve slit 41 determine the separation effect of the long fiber components and the short fiber components. In the embodiment of the present application, the long fiber components that need to be retained by the sieve plate 4 are cotton fibers with a length of more than 4 mm, and the short fiber components that need to be screened by the sieve plate 4 are cotton fibers with a length of less than 4 mm. In order to ensure the separation effect, the length L of the sieve slit 41 is 90mm-110mm, and the width W of the sieve slit 41 is 0.2mm-0.4mm. In order to further improve the separation effect, the length L of the sieve slit 41 is 100mm, and the width W of the sieve slit 41 is 0.3mm±0.005mm.

[0038] As shown in Figure 1 , Figure 3 , and Figure 4As shown in the embodiment of this utility model, the vibration structure 3 includes a base 33, a vibration pad 31, and a vibration drive structure. The sample cell structure 1 is mounted on the base 33, the vibration pad 31 is sealed to the bottom of the sample cell structure 1, and the vibration drive structure is installed inside the base 33 and located below the vibration pad 31. By sealing the bottom of the sample cell structure 1 with the vibration pad 31, the liquid inside the sample cell structure 1 will not leak due to vibration. The vibration pad 31 then vibrates up and down under the drive of the vibration drive structure. Furthermore, the up-and-down vibration of the vibration pad 31 causes the volume of the sample cell structure 1 to fluctuate within a certain range, resulting in pressure changes, thereby improving the upward vibration recoil and downward vibration suction effects.

[0039] like Figure 3 and Figure 4 As shown, in some embodiments, the periphery of the vibration pad 31 is sealed and fixedly connected to the periphery of the bottom of the sample tank structure 1. Utilizing the elastic deformation capability of the vibration pad 31 itself, the vibration pad 31 can vibrate up and down under the drive of the vibration drive structure below it. Specifically, the top of the base 33 is connected to the bottom of the bottom tank 12. The vibration drive structure includes a drive motor and an eccentric wheel 32. The drive motor is installed inside the base 33, and the eccentric wheel 32 is installed on the drive motor's shaft 34 and located below the vibration pad 31. The eccentric wheel 32 rotates with the drive motor's shaft 34, thus driving the vibration pad 31 to vibrate up and down. The specific structure of the vibration drive structure can also be the same as the specific structure of other vibration structures 3 in the prior art, and will not be described in detail here.

[0040] In other embodiments, the vibration pad 31 is slidably and sealed to the bottom of the sample cell structure 1 along the axial direction of the sample cell structure 1, so that the vibration pad 31 can slide up and down under the drive of the vibration drive structure below it to form up and down vibration. Specifically, the base 33 is provided with a mounting plate, and the vibration pad 31 is connected to the mounting plate by multiple springs arranged along the axial direction of the sample cell structure 1. The eccentric wheel 32 can push the vibration pad 31 to slide upward as the drive motor shaft 34 rotates, and then slide downward under the elastic restoring force of the multiple springs, thereby forming up and down vibration.

[0041] like Figure 1 As shown in the embodiment of this utility model, the long fiber component detection device further includes a water replenishment structure 5 and an overflow structure 7. The water replenishment structure 5 is connected to the top of the sample tank structure 1, and the overflow structure 7 is connected to the bottom of the sample tank structure 1. The liquid in the sample tank structure 1 can carry the medium and short fiber groups below the sieve plate 4 into the overflow structure 7. At the same time, water is replenished in time during discharge through the water replenishment structure 5, so that the sample to be tested in the sample tank structure 1 can always be diluted to a low concentration by water. Thus, through continuous discharge and continuous water replenishment, it is beneficial to the dispersion of fiber components and further improves the separation effect.

[0042] Specifically, the water supplement structure 5 comprises a water supplement pipeline 51, a water supplement flowmeter 52 and a water supplement valve are installed on the water supplement pipeline 51 to control and adjust the water supplement to the sample tank structure 1. The communication position of the overflow structure 7 with the sample tank structure 1 is below the sieve plate 4.

[0043] The inner cavity of the overflow structure 7 is divided into a discharge tank 72 and an overflow tank 71 by an overflow partition plate 74, the overflow partition plate 74 is provided with an overflow port 73, the sample tank structure 1 is provided with a preset liquid level, the height of the overflow port 73 is equal to the preset liquid level, and the bottom of the discharge tank 72 is in communication with the bottom of the sample tank structure 1. The inner cavity of the overflow structure 7 is divided into the discharge tank 72 and the overflow tank 71 by the overflow partition plate 74, the overflow port 73 with the height equal to the preset liquid level is arranged on the overflow partition plate 74, the liquid can flow into the discharge tank 72 from the overflow port 73, the liquid level in the sample tank structure 1 is basically maintained at the preset liquid level, the flow rate of the liquid is basically consistent, and the detection results of different samples have comparability.

[0044] Specifically, the bottom of the discharge tank 72 is provided with a discharge port 75, and a discharge valve 77 is installed at the discharge port 75. During the screening process, the discharge valve 77 is kept in a closed state; when the screening is completed, the discharge valve 77 is opened, so that the liquid in the discharge tank 72 and the sample tank structure 1 carries the short fiber component below the sieve plate 4 to flow out from the discharge port 75. The bottom of the overflow tank 71 is provided with an overflow drain port 76, and the liquid overflowing from the overflow port 73 into the overflow tank 71 flows out from the overflow drain port 76 during the screening process. The overflow partition plate 74 is basically in a plate structure, the height of the top end of the overflow partition plate 74 is equal to the preset liquid level, the height of the top end of the inner cavity of the overflow structure 7 is higher than that of the overflow partition plate 74, and the overflow partition plate 74 is connected with the opposite two inner side surfaces of the inner cavity of the overflow structure 7, so that the top end of the overflow partition plate 74 and the two inner side surfaces form a groove structure constituting the overflow port 73. Alternatively, the overflow port 73 can also be a through hole structure arranged on the overflow partition plate 74.

[0045] In the embodiment of the utility model, the long fiber component detection device further comprises a spraying structure 6, the spraying structure 6 is installed at the top of the sample tank structure 1, and the water supplement structure 5 is in communication with the top of the sample tank structure 1 through the spraying structure 6. The spraying structure 6 is arranged to spray the supplemented water into the sample tank structure 1, and the spraying structure 6 can also disperse the fiber components in the sample tank structure 1.

[0046] Specifically, the spraying structure 6 comprises a spraying cover which is arranged on the top opening of the sample tank structure 1, the spraying cover is internally provided with a distribution cavity, the bottom surface of the spraying cover is provided with a plurality of spraying holes which are in communication with the distribution cavity, the top surface of the spraying cover is provided with a water supplement opening which is in communication with the distribution cavity, and the water supplement structure 5 is in communication with the water supplement opening. The spraying cover can be made of transparent plastic material, so as to facilitate the observation of the separation condition in the sample tank structure 1. Of course, the spraying cover can also be made of opaque plastic material or other materials. One side edge of the spraying cover is hingedly connected with one side edge of the top of the sample tank structure 1. In addition, the inner bottom surface of the spraying cover can be provided with a flow guide groove, the water flow in the distribution cavity is guided to the plurality of spraying holes through the flow guide groove, so that the water can be uniformly sprayed into the sample tank structure 1.

[0047] In order to more clearly understand and implement the long fiber component detection device of the present application, some specific embodiments are provided as follows:

[0048] The detection steps include:

[0049] A certain amount of cotton pulp (i.e. a mixture of cotton fibers and water) or a certain amount of cotton pulp board is taken and soaked until wet, and then squeezed and weighed 30g of the pulp, which is denoted as m0;

[0050] The weighed pulp is put into a fiber disentangling machine and disentangled for 15000 revolutions;

[0051] Water is added to the sample tank structure 1, and compressed air is introduced into the sample tank structure 1 from the plurality of air inlets 2;

[0052] The disentangled pulp is poured into the sample tank structure 1, and water is continuously added until water flows out of the overflow port 73; wherein the amount of water in the sample tank structure 1 is about 20L;

[0053] The vibration structure 3 is started and the time is counted, the frequency of up-down vibration is 700 times / min, and the screening starts;

[0054] The water supplement valve is opened, the water supplement is performed at a flow rate of 6L / min for 300s, so that the amount of water in the sample tank structure 1 is always maintained at about 20L;

[0055] The water supplement valve is closed and the discharge valve 77 is opened, until the liquid level in the sample tank structure 1 is lowered to the sieve plate 4, the air inlet valve is closed, the vibration structure 3 is turned off, and the screening is stopped;

[0056] The long fiber cotton pulp intercepted on the sieve plate 4 is collected, squeezed and weighed, and the mass of the long fiber cotton pulp is denoted as m1;

[0057] Finally, the content of the long fiber component is calculated: the content of the long fiber component (%) = m1 / m0 x 100%.

[0058] Example 1

[0059] The long fiber component detection device is used for testing the content of long fiber components of cotton linter pulp board, short fiber cotton pulp board and three-stage cotton pulp board (the average length of cotton fibers is required to be below 2.5 mm) produced by the same manufacturer, and the results are as follows:

[0060]

[0061] Example one

[0062] The long fiber component detection device is used for testing the content of long fiber components of three-stage cotton pulp board produced by different manufacturers, and the results are as follows:

[0063]

[0064] Example three

[0065] The process of producing cotton pulp board by a manufacturer is divided into four stages, i.e. 30 min, 40 min, 50 min and 60 min four stages of beating by a washing beater. The cotton fibers are successively shortened from stage one to stage four, the long fiber component detection device is used for testing the content of long fiber components of fiber sampling of the four stages, and the results are as follows:

[0066]

[0067] Example four

[0068] The process of producing cotton pulp board by a manufacturer is divided into nine stages, i.e. pulp material is discharged from a steaming ball, then beating by a washing beater for 30 min, and then beating by a large cone beater for 1 circle, 2 circles, 3 circles, 4 circles, 5 circles, 6 circles and 7 circles. The cotton fibers are successively shortened from stage one to stage nine, and stage six is a short fiber cotton pulp board completion stage. The long fiber component detection device is used for testing the content of long fiber components of fiber sampling of the nine stages, and the results are as follows:

[0069]

[0070] The above only describes several embodiments of the present application, and those skilled in the art can make various modifications or changes to the embodiments of the present application according to the disclosed content of the application without departing from the spirit and scope of the present application.

Claims

1. A long fiber component detection device characterized by, The long fiber component detection device comprises a sample tank structure for containing a detected sample of cotton fiber pulp board and water to dilute the detected sample to a preset concentration; a gas flow dispersion structure, a plurality of air inlets are arranged on the bottom of the sample tank structure in a circumferential direction, the gas flow dispersion structure is connected with the plurality of air inlets; a vibration structure which is installed on the bottom of the sample tank structure and can vibrate up and down; a sieve plate which is installed in the sample tank structure and located between the air inlets and the vibration structure, a plurality of sieve slots are arranged on the sieve plate in a spaced manner.

2. The long fiber component detection device according to claim 1, wherein the length of the sieve slot is 90mm-110mm, and the width of the sieve slot is 0.2mm-0.4mm.

3. The long fiber component detection device according to claim 2, wherein the length of the sieve slot is 100mm, and the width of the sieve slot is 0.3mm±0.005mm.

4. The long fiber component detection device according to claim 1, wherein the vibration structure comprises a base, a vibration pad and a vibration driving structure, the sample tank structure is installed on the base, the vibration pad is sealingly connected with the bottom of the sample tank structure, and the vibration driving structure is installed in the base and located below the vibration pad.

5. The long fiber component detection device according to claim 4, wherein the vibration driving structure comprises a driving motor and an eccentric wheel, a mounting plate is arranged in the base, the driving motor is installed in the base, the eccentric wheel is installed on the rotating shaft of the driving motor and located below the vibration pad, and the eccentric wheel can push the vibration pad to vibrate up and down with the rotation of the rotating shaft of the driving motor.

6. The long fiber component detection device according to claim 1, further comprising a water supplement structure and an overflow structure, the water supplement structure is connected with the top of the sample tank structure, and the overflow structure is connected with the bottom of the sample tank structure.

7. The long fiber component detection device according to claim 6, further comprising a spraying structure, the spraying structure is installed on the top of the sample tank structure, and the water supplement structure is connected with the top of the sample tank structure through the spraying structure.

8. The long fiber component detection device according to claim 7, wherein the spraying structure comprises a spraying cover, the spraying cover covers the opening of the top of the sample tank structure, the spraying cover has a distribution cavity therein, a plurality of spraying holes are arranged on the bottom surface of the spraying cover and connected with the distribution cavity, a water supplement opening is arranged on the top surface of the spraying cover and connected with the distribution cavity, and the water supplement structure is connected with the water supplement opening.

9. The long fiber component detection device according to claim 6, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The inner cavity of the overflow structure forms a discharge groove and an overflow groove through an overflow partition plate, the bottom of the discharge groove is communicated with the bottom of the sample groove structure, the overflow partition plate is provided with an overflow port, the sample groove structure is provided with a preset liquid level, and the height of the overflow port is equal to the preset liquid level; the bottom of the discharge groove is provided with a discharge port, and a discharge valve is installed at the discharge port; and the bottom of the overflow groove is provided with an overflow drain port.

10. The long fiber component detection apparatus according to claim 6, wherein, The water supplementing structure comprises a water supplementing pipeline, a water supplementing flowmeter and a water supplementing adjusting valve are installed on the water supplementing pipeline.

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