Plastic dye particle swarm average compactness detection equipment

Abstract

The utility model belongs to the technical field of plastic dye detection instruments, and particularly relates to plastic dye particle swarm average compactness detection equipment. The device comprises a gas sealing chamber, a particle sealing chamber, an inert gas source, a gas source electric control valve, a gas source gas pump, an inter-chamber electric control valve, a vacuum pump, a vacuum electric control valve, a first pressure sensor, a second pressure sensor and a control unit. According to the plastic dye particle swarm average compactness detection equipment disclosed by the invention, the actual average compactness of the particle swarm can be measured through the change of quantitative inert gas pressure caused by the plastic dye particle swarm, so that the forming state of dye particles can be known in time in a production field, and the process and the formula can be adjusted in time.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of plastic dye detection instruments, and particularly relates to a plastic dye particle group average compactness detection device. BACKGROUND

[0002] The compactness of plastic dye (coloring agent) is one of important indexes reflecting the loose or compact degree of plastic dye. The occurrence state of plastic dye is generally particle structure (regular, such as spherical, cylindrical, irregular, such as flaky, etc.), but it is impractical and meaningless to measure the compactness of each particle, so the average compactness of the plastic dye particle group becomes one of the commonly used evaluation indexes in industry.

[0003] In the prior art, the drainage method is usually used to measure the compactness of materials. Since the density of plastic dye particles is close to that of liquid water, and the water infiltration performance of plastic dye particles of different formulations is different, the drainage method is not an effective method for measuring the average compactness of the plastic dye particle group. CONTENT OF THE INVENTION

[0004] Therefore, the application provides a plastic dye particle group average compactness detection device to solve all or part of the technical problems described in the background section.

[0005] The innovative idea of the application is that the actual average compactness of the particle group is measured based on the ideal gas state equation through the change of the pressure of the inert gas caused by the plastic dye particle group.

[0006] The plastic dye particle group average compactness detection device provided by the application to solve the technical problems is as follows.

[0007] A plastic dye particle group average compactness detection device, comprising a gas sealing chamber, a particle sealing chamber, an inert gas source, and a control unit; the inert gas source is connected to the gas sealing chamber through a gas source pipeline, and a gas source electric control valve and a gas source air pump are arranged between the inert gas source and the gas sealing chamber;

[0008] The particle sealing chamber is connected to the bottom of the gas sealing chamber through an inter-chamber pipeline, and an inter-chamber electric control valve is arranged on the inter-chamber pipeline; the plastic dye particle group average compactness detection device further comprises a vacuum pump connected to the particle sealing chamber through a vacuum pipeline, and a vacuum electric control valve is arranged on the vacuum pipeline; first and second gas pressure sensors are arranged in the gas sealing chamber and the particle sealing chamber respectively; the gas source electric control valve, the gas source air pump, the inter-chamber electric control valve, the first and second gas pressure sensors, the vacuum pump, and the vacuum electric control valve are electrically connected to the control unit.

[0009] Wherein: the gas sealed chamber (v1) is used to measure the first state (p1·v1) of the quantitative inert gas before the volume changes; the particle sealed chamber (v2) is used to measure the second state (p2, v x ) of the quantitative inert gas after the volume changes, wherein V x is the volume (v1+v2-v x ) after the gas sealed chamber (v1) and the particle sealed chamber (v2) are communicated and the particle group (v x ) with the mass of m is introduced; the actual volume v x of the particle group can be obtained according to the ideal gas state equation, and then the actual average density p x of the particle group is calculated in combination with the mass m of the particle group; the actual average density is equal to the quotient of the actual average density (p x ) and the standard density (p0) of the measured plastic particles.

[0010] The existing technology usually directly measures the space size occupied by the plastic particles by using a measuring cylinder or a container. This method is relatively simple, but may be affected by the particle shape and the stacking method. It has been described in the foregoing that the drainage method is not an effective method for measuring the actual volume of the particle group because the density of the plastic particles is close to that of liquid water and the wettability of water is different. Other measurement methods such as destroying the plastic particles to measure the volume after compaction will change the actual structure of the particle group (such as the degree of looseness of the material, internal cavities, surface gaps, structure perforations, etc.), and thus cannot truly reflect the actual density of the plastic particle group.

[0011] The application helps to understand the forming state of the plastic dye particle group in time in the production process to facilitate the timely adjustment of the production process and the raw material formula by measuring the actual average density of the plastic dye particle group by using the ideal gas state equation.

[0012] As a preferred, the plastic dye particle group average density detection device further comprises a detection table; the gas sealed chamber and the particle sealed chamber are arranged on the detection table.

[0013] As a preferred, the particle sealed chamber comprises an upper shell and a dispersion seat; the dispersion seat is provided with a dispersion disc and a gas cavity, the dispersion disc is provided with a plurality of particle sites, and the particle sites are communicated to the gas cavity; the upper shell and the dispersion seat are sealingly connected, a chamber interconnection pipeline is communicated to a bottom gas inlet of the gas cavity, and the dispersion seat is arranged on the detection table.

[0014] As a preferred, the detection table is provided with a dispersion seat clamping position; the dispersion seat is arranged in the dispersion seat clamping position.

[0015] As a preferred, the upper shell and the dispersion seat are sealingly connected through a sealing ring.

[0016] Preferably, the detection platform is further provided with a gantry and a lifting mechanism; the gantry is arranged at the upper portion of the particle sealing chamber, and the lifting mechanism is arranged on the gantry and connected to the upper shell.

[0017] Preferably, the control unit is used to complete the system control function, and can be a control system based on an MCU (microcontroller unit) or a control system based on a micro industrial control computer. Further, the control unit is an industrial microcomputer.

[0018] Preferably, the control unit is provided with an inter-chamber electrically-controlled valve control module, a gas source electrically-controlled valve control module, a gas source gas pump control module, a first pressure reading module, a second pressure reading module, a vacuum electrically-controlled valve control module, a vacuum pump control module, and an operation module; wherein:

[0019] The inter-chamber electrically-controlled valve control module, the gas source electrically-controlled valve control module, the gas source gas pump control module, the first pressure reading module, the second pressure reading module, the vacuum electrically-controlled valve control module, and the vacuum pump control module are used to complete the control function of the corresponding components or assemblies; and the operation module is used to calculate the actual average density of the sample particle group according to ρ = m·p2 / [(v1+v2)·p2-p1·v1]. x x .

[0020] The detection method corresponding to the aforementioned plastic dye particle group average density detection device comprises the following detection steps:

[0021] Step 01: inflation step, turn off the inter-chamber electrically-controlled valve, turn on the gas source electrically-controlled valve, and introduce inert gas into the gas sealing chamber through the gas source gas pump; record the gas pressure p1 detected by the first gas pressure sensor;

[0022] Step 02: sample releasing step, remove the upper shell, place the sample with a mass of m on the dispersion disc, and return the upper shell;

[0023] Step 03: vacuumizing step, turn on the vacuum electrically-controlled valve, vacuumize the particle sealing chamber through the vacuum pump and the second gas pressure sensor, and then turn off the vacuum electrically-controlled valve;

[0024] Step 04: sample mixing step, turn on the inter-chamber electrically-controlled valve, and make the compressed gas in the gas sealing chamber enter the particle sealing chamber through the dispersion disc; record the gas pressure p2 detected by the first gas pressure sensor;

[0025] Step 05: operation step, the control unit calculates the actual average density of the sample particle group according to ρ = m·p2 / [(v1+v2)·p2-p1·v1]; wherein v1 and v2 are the volumes of the gas sealing chamber 1 and the particle sealing chamber 2, respectively. ​

[0026] Beneficial technical effects:

[0027] The plastic dye particle group average density detection device disclosed in the application can measure the actual average density of the particle group based on the ideal gas state equation by measuring the change of the pressure of the quantitative inert gas caused by the plastic dye particle group, which helps to understand the molding state of the dye particles in time on the production site to adjust the process and formula in time.

[0028] The technical solutions and technical effects of the application will be described in detail in combination with the drawings and specific embodiments of the application. BRIEF DESCRIPTION OF DRAWINGS

[0029] Fig. 1 : front perspective view of plastic dye particle group average density detection device;

[0030] Fig. 2 : top perspective view of plastic dye particle group average density detection device;

[0031] FIGURE DESCRIPTION:

[0032] 1-gas sealing chamber, 11-first gas pressure sensor;

[0033] 2-particle sealing chamber, 21-second gas pressure sensor, 22-upper shell, 23-dispersion seat; 231-dispersion disc, 232-gas cavity, 233-particle site;

[0034] 3-inert gas source;

[0035] 4-gas source electric control valve;

[0036] 5-gas source air pump;

[0037] 6-inter-chamber electric control valve;

[0038] 7-vacuum pump;

[0039] 8-vacuum electric control valve;

[0040] 9-detection table, 91-dispersion seat clamping position, 92-gantry, 93-lifting mechanism. DETAILED DESCRIPTION

[0041] Please refer to Figs. 1-2 The plastic dye particle group average density detection device claimed in the application comprises a gas sealing chamber 1, a particle sealing chamber 2, an inert gas source 3, a control unit, and a detection table 9.

[0042] The inert gas source 3 is communicated to the gas sealing chamber 1 through a gas source pipeline, and a gas source electric control valve 4 and a gas source air pump 5 are arranged between the inert gas source 3 and the gas sealing chamber 1; a first air pressure sensor 11 is arranged in the gas sealing chamber 1; control ends of the first air pressure sensor 11, the gas source electric control valve 4 and the gas source air pump 5 are electrically connected to a control unit.

[0043] The particle sealing chamber 2 is arranged on the detection table 9, and the inert gas source 3 and the gas source air pump 5 are arranged below the detection table 9.

[0044] The gas source electric control valve 4 is turned on, and the gas source air pump 5 is started, so that the inert gas source, such as nitrogen, can be pumped into the gas sealing chamber 1 to obtain a first state of quantitative nitrogen. When the gas pressure reaches a suitable value, the gas source electric control valve 4 is turned off and the gas source air pump 5 is stopped; at this time, the gas state is recorded as (p1·v1).

[0045] The particle sealing chamber 2 comprises an upper shell 22 and a dispersion seat 23; the detection table 9 is provided with a dispersion seat clamping position 91; the dispersion seat 23 is arranged in the dispersion seat clamping position 91 and is sealingly connected through a sealing ring.

[0046] The dispersion seat 23 is provided with a dispersion disc 231 and a gas cavity 232, the dispersion disc 231 is provided with a plurality of particle positions 233, the particle positions 233 are communicated to the gas cavity 232; the particle sealing chamber 2 is communicated to the bottom of the gas sealing chamber 1 through an inter-chamber pipeline, and an inter-chamber electric control valve 6 is arranged on the inter-chamber pipeline; the inter-chamber pipeline is communicated to the bottom gas inlet of the gas cavity 232.

[0047] The inter-chamber electric control valve 6 is turned on, so that the inert gas in the gas sealing chamber 1 can be introduced into the particle sealing chamber 2 from the bottom gas inlet of the gas cavity 232. The particle positions 233 on the dispersion disc 231 can play a role in distributing the airflow, and the particle group placed on the dispersion disc 231 can be dispersed under the action of the pressure airflow to avoid the structures such as holes, gaps and cracks on the particles from being blocked and unable to contact the compressed gas; at this time, a second state of quantitative nitrogen is recorded as (p2, v x ). When the gas pressure p1 in the gas sealing chamber 1 is large enough, the gas pressure and density after the two sealing chambers are communicated are still large enough to blow up the particle group on the dispersion disc 231 and suspend it in the particle sealing chamber 2.

[0048] Before the inter-chamber electric control valve 6 is turned on, the particle sealing chamber 2 should be first pumped to vacuum to ensure the accuracy of the measurement; therefore, the particle sealing chamber 2 is further provided with a vacuum pump 7; the vacuum pump 7 is communicated to the particle sealing chamber 2 through a vacuum pipeline, and a vacuum electric control valve 8 is arranged on the vacuum pipeline. In order to record the degree of vacuum pumping, the particle sealing chamber 2 is further provided with a second air pressure sensor 21. Control ends of the vacuum pump 7, the vacuum electric control valve 8 and the second air pressure sensor 21 are electrically connected to the control unit.

[0049] Turn on the vacuum control valve 8 and start the vacuum pump 7 to evacuate the particle sealing chamber 2 to a vacuum state; then turn off the vacuum control valve 8, stop the vacuum pump 7, and turn on the inter-chamber control valve 6.

[0050] After the inert gas in the two sealed chambers reaches a stable state; the volume V at this point... x The total volume (v1+v2) of the gas-sealed chamber (v1) and the particle-sealed chamber (v2) is given by the mass of the particle swarm (vm). x The difference in volume (v1+v2-v) x The true volume v of a swarm of particles with mass m can be obtained using the ideal gas law. x Then, the actual average density ρ of the particle swarm with mass m is calculated. x Furthermore, based on ρ x / ρ0 yields the average density of the particle swarm.

[0051] Therefore, the method for detecting the average density of plastic dye particle clusters disclosed in this application includes the following detection steps:

[0052] Step 01: Inflation step, disconnect the inter-chamber electrical control valve 6, open the gas source electrical control valve 4, and introduce inert gas into the gas sealing chamber 1 through the gas source pump 5; record the gas pressure p1 detected by the first pressure sensor 111;

[0053] Step 02: Remove the upper shell 22, place the test sample with mass m on the dispersion plate 231, and return the upper shell 22 to its original position.

[0054] Step 03: Vacuuming step, turn on vacuum control valve 8, use vacuum pump 7 and second pressure sensor 21 to evacuate particle sealing chamber 2, and then turn off vacuum control valve 8.

[0055] Step 04: Mixing the sample. Turn on the intercompartmental electronic control valve 6 to allow the compressed gas in the gas-sealed chamber 1 to enter the particle-sealed chamber 2 through the dispersion disk 231; record the gas pressure p2 detected by the first pressure sensor 11.

[0056] Step 05: The control unit calculates based on ρ. x =m·p2 / [(v1+v2)·p2-p1·v1] calculates the actual average density ρ of the sample particle swarm. x Where: v1 and v2 are the volumes of gas-sealed chamber 1 and particle-sealed chamber 2, respectively.

[0057] The control unit is used for completing system control function, and can be a control system based on MCU (microcontroller unit) or a control system based on a micro industrial control computer. As known from the above detection step, the control unit is provided with an inter-chamber electrically-controlled valve control module, a gas source electrically-controlled valve control module, a gas source air pump control module, a first pressure reading module, a second pressure reading module, a vacuum electrically-controlled valve control module, a vacuum pump control module and an operation module. The inter-chamber electrically-controlled valve control module, the gas source electrically-controlled valve control module, the gas source air pump control module, the first pressure reading module, the second pressure reading module, the vacuum electrically-controlled valve control module and the vacuum pump control module are used for completing control function of corresponding components or assemblies; and the operation module is used for calculating the actual average density ρ of the sample particle group according to ρ x = m·p2 / [(v1+v2)·p2-p1·v1] x .

[0058] In a variable embodiment of the present application, the detection table 9 is further provided with a gantry 92 and a lifting mechanism 93. The gantry 92 is arranged at the upper portion of the particle sealing chamber 2, and the lifting mechanism 93 is arranged on the gantry 92 and connected to the upper shell 22. The lifting mechanism 93 is a pneumatic cylinder, an oil cylinder or an electric cylinder. After the lifting mechanism 93 is started, the upper shell 22 can be lifted to facilitate cleaning or sample placing, and the upper shell 22 can also be returned to the original position to start detection.

[0059] The technical solutions and technical effects of the present application are described in detail above in combination with the drawings and specific embodiments, and it should be noted that other embodiments can be developed by those skilled in the art on the basis of the present application; any simple transformation and equivalent replacement without departing from the innovative concept of the present application are covered by the present application and belong to the protection scope of the present patent.

Claims

1. A plastic dye particle group average density detection device, characterized in that: it comprises a gas sealing chamber (1), a particle sealing chamber (2), an inert gas source (3), and a control unit; the inert gas source (3) is communicated to the gas sealing chamber (1) through a gas source pipeline, and a gas source electric control valve (4) and a gas source air pump (5) are arranged between the inert gas source (3) and the gas sealing chamber (1); the particle sealing chamber (2) is communicated to the bottom of the gas sealing chamber (1) through an inter-chamber pipeline, and an inter-chamber electric control valve (6) is arranged on the inter-chamber pipeline; the plastic dye particle group average density detection device further comprises a vacuum pump (7) which is communicated to the particle sealing chamber (2) through a vacuum pipeline, and a vacuum electric control valve (8) is arranged on the vacuum pipeline; first and second air pressure sensors (11) and (21) are respectively arranged in the gas sealing chamber (1) and the particle sealing chamber (2); and the gas source electric control valve (4), the gas source air pump (5), the inter-chamber electric control valve (6), the first and second air pressure sensors (11) and (21), the vacuum pump (7), and the vacuum electric control valve (8) are electrically connected to the control unit.

2. The plastic dye particle group average density detection device according to claim 1, characterized in that: the plastic dye particle group average density detection device further comprises a detection table (9); and the gas sealing chamber (1) and the particle sealing chamber (2) are arranged on the detection table (9).

3. The plastic dye particle group average density detection device according to claim 2, characterized in that: the particle sealing chamber (2) comprises an upper shell (22) and a dispersion seat (23); the dispersion seat (23) is provided with a dispersion disc (231) and a gas cavity (232), the dispersion disc (231) is provided with a plurality of particle sites (233) which are communicated to the gas cavity (232); the upper shell (22) and the dispersion seat (23) are sealingly connected, the inter-chamber pipeline is communicated to the bottom air inlet of the gas cavity (232), and the dispersion seat (23) is arranged on the detection table (9).

4. The plastic dye particle group average density detection device according to claim 3, characterized in that: the detection table (9) is provided with a dispersion seat clamping position (91); and the dispersion seat (23) is arranged in the dispersion seat clamping position (91).

5. The plastic dye particle group average density detection device according to claim 3, characterized in that: the upper shell (22) and the dispersion seat (23) are sealingly connected through a sealing ring.

6. The plastic dye particle group average density detection device according to claim 3, characterized in that: the detection table (9) is further provided with a gantry (92) and a lifting mechanism (93); the gantry (92) is arranged on the upper part of the particle sealing chamber (2), and the lifting mechanism (93) is arranged on the gantry (92) and connected to the upper shell (22).

7. The plastic dye particle group average density detection device according to claim 3, characterized in that: the lifting mechanism (93) is a pneumatic cylinder, an oil cylinder, or an electric cylinder.

8. The plastic dye particle group average density detection device according to claim 3, characterized in that: the control unit is an industrial microcomputer. ​ ​ ​ ​ ​ ​ ​ ​ ​ 5. The apparatus according to claim 3, wherein: ​ ​ ​ ​ 7. The apparatus according to claim 6, wherein: ​ 8. The apparatus for detecting the population average solidity of plastic dye particles according to claim 1, characterized in that: ​

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