Asphalt volatile organic compound collecting device

Abstract

The invention belongs to the technical field of asphalt volatile organic compounds, and particularly discloses an asphalt volatile organic compound collecting device which comprises a reaction box, a test bed and a collecting structure matched with the test bed are arranged in the reaction box, and a waste collecting structure matched with the test bed is arranged on the bottom face of the reaction box. The collecting structure comprises a collecting cover arranged in the reaction box, and the collecting cover is matched with a circular truncated cone collecting cylinder arranged on the test bed; and a sealing door matched with the test bed is arranged on the side surface of the reaction box. The collection structure is designed in the reaction box to collect and treat organic matters generated by asphalt volatilization, so that the volatile organic matters in asphalt can be conveniently collected and detected, the volatile organic matters in asphalt can be detected in real time in the collection process, and the test detection waiting time is shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of asphalt volatile organic compounds, and particularly relates to an asphalt volatile organic compound collecting device. Background Art

[0002] Asphalt will produce asphalt volatiles when heated at high temperatures or during long-term use, which not only harms the environment but also causes deterioration in asphalt performance. Since asphalt is a complex mixture composed of organic hydrocarbons of different molecular weights, it is easy to produce volatile organic compounds at high temperatures or normal temperature and pressure. Depending on the type of asphalt and the processing method, the composition of volatile organic compounds varies greatly.

[0003] After sampling is completed, the existing asphalt volatile organic compound collection device requires manual cleaning of the asphalt waste after the test is completed, which is time-consuming and can easily cause the cleaning personnel to inhale asphalt volatile organic compounds, affecting the health of the cleaning personnel. It will also affect the collection and detection of the next batch of asphalt volatiles and affect the collection and detection efficiency of asphalt volatiles.

[0004] Chinese patent application number CN205538370U discloses a device for collecting and analyzing volatile organic compounds (VOCs) from asphalt pavements. The device comprises a sealed box, a test specimen table, a heating resistor below the test specimen table, an ultraviolet lamp above the test specimen table, and a spray device at the top of the box. The box is equipped with an organic matter collection hole, which is inserted into a conical flask via a glass tube. A glass fiber filter membrane is attached to the glass tube. The box is connected to a control box via a wire. A temperature and humidity sensor is located at the junction of the two boxes. This device can simulate the temperature, UV light, and humidity conditions experienced during the use of an asphalt pavement, thereby detecting the release of VOCs from the asphalt during its service life. After the collection and analysis of VOCs from an asphalt pavement, the device requires manual cleaning of the box. This time-consuming process not only increases the risk of inhalation of asphalt volatiles by the cleaning personnel, potentially affecting their health, but also hinders the collection and detection of the next batch of asphalt volatiles, reducing the efficiency of asphalt volatile collection and detection. Summary of the Invention

[0005] In order to solve the above problems, this patent provides an asphalt volatile organic compound collection device.

[0006] Based on the above objectives, the present invention is achieved through the following technical solutions: A device for collecting volatile organic compounds from asphalt comprises a reaction box, a test bench and a collection structure cooperating with the test bench provided inside the reaction box, and a waste collection structure cooperating with the test bench provided on the bottom surface of the reaction box; the collection structure comprises a collection hood provided inside the reaction box, the collection hood cooperating with a round table collection cylinder provided on the test bench; and a sealing door cooperating with the test bench is provided on the side of the reaction box.

[0007] Preferably, the reaction box is provided with a collection tube that matches the top of the collection hood, the collection tube is provided with a detachable collection box, and the collection tube is provided with a collection valve; the collection box is provided with an adsorption resin; the current methods for detecting VOCs in asphalt produced under high temperature conditions include: (1) XAD resin adsorption sampling followed by thermal desorption pretreatment. VOCs are qualitatively and quantitatively analyzed using gas chromatography (CC); and (2) condensed gas chromatography analysis.

[0008] Preferably, the collecting cover is provided with an adjusting connecting rod, which cooperates with an adjusting sleeve arranged in the reaction box, and the adjusting sleeve is provided with an adjusting motor that cooperates with the adjusting connecting rod; a flexible folding tube connected to the collecting tube is provided at the top of the collecting cover.

[0009] Preferably, the movable end of the regulating motor is engaged with the regulating rack provided on the regulating connecting rod; a sampling tube is provided on the collecting tube, and a sealing rubber gasket is provided in the sampling tube.

[0010] Preferably, the waste collection structure includes a test hole arranged on the test bench, an adjustable storage platform is provided in the test hole, and the storage platform cooperates with an adjustment column arranged on one side of the test hole.

[0011] Preferably, an adjustment groove is provided on the side of the adjustment column, the adjustment groove cooperates with the adjustment cam arranged on the side of the storage platform, the adjustment cam is connected to the storage platform through the adjustment shaft, and the adjustment cam is connected to the adjustment spring arranged in the adjustment groove; a support pulley is provided on the side of the storage platform, and the support pulley and the adjustment cam are arranged on the same side of the storage platform.

[0012] Preferably, a traction motor is provided on the bottom surface of the test bench, and a traction cam is provided at the movable end of the traction motor to match the storage platform.

[0013] Preferably, a heat-resistant traction line is provided on the traction cam, and the heat-resistant traction line is connected to the traction ring provided on the storage platform through a traction hole and a traction pulley provided on the test platform.

[0014] Preferably, a temperature regulating cavity is provided in the storage table, and a storage ring convex is provided on the outer periphery of the storage table; and a waste box matched with the storage table is provided under the test table.

[0015] Preferably, the frustum collecting cylinder is a heat-insulating cylinder.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention collects and processes the organic matter generated by asphalt volatilization by designing a collection structure in the reaction box, thereby facilitating the collection and detection of asphalt volatile organic matter. It can also perform real-time detection of asphalt volatile organic matter during the collection process, thereby reducing the waiting time for test detection. By designing a waste collection structure, the waste after asphalt volatilization is quickly collected, thereby reducing the waiting time for test, facilitating the present invention to continuously collect and detect asphalt volatile organic matter, improving the efficiency of asphalt volatile organic matter collection and detection, and reducing the possibility of cleaning personnel inhaling asphalt volatile organic matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the present invention in Example 1; Figure 2 It is a schematic diagram of the internal structure of the present invention in Example 1.

[0018] In the figure, there are reaction box 1, sealing door 2, collecting valve 3, collecting tube 4, collecting box 5, sampling tube 6, conical collecting tube 7, collecting cover 8, flexible folding tube 9, adjusting sleeve 10, adjusting motor 11, adjusting connecting rod 12, traction pulley 13, traction motor 14, traction cam 15, adjusting column 16, heat-resistant traction line 17, traction ring 18, storage table 19, and test bench 20. DETAILED DESCRIPTION

[0019] The present invention is further described below with reference to specific examples, which however do not limit the scope of the present invention.

[0020] Example 1 An asphalt volatile organic compound collection device, the structure of which is as follows Figure 1-Figure 2 As shown, the reaction chamber 1 includes a test bench 20 and a collection structure that cooperates with the test bench 20. The bottom surface of the reaction chamber 1 is provided with a waste collection structure that cooperates with the test bench 20. The collection structure includes a collection hood 8 disposed within the reaction chamber 1, which cooperates with a conical collection cylinder 7 disposed on the test bench 20. A sealing door 2 is provided on the side of the reaction chamber 1 that cooperates with the test bench 20. The conical collection cylinder 7 is a heat-insulating cylinder.

[0021] The reaction box 1 is provided with a collecting pipe 4 matched with the top of the collecting cover 8 , the collecting pipe 4 is provided with a detachable collecting box 5 , and the collecting pipe 4 is provided with a collecting valve 3 .

[0022] The collection hood 8 is equipped with an adjustment rod 12, which cooperates with an adjustment sleeve 10 located within the reaction chamber 1. The adjustment sleeve 10 is equipped with an adjustment motor 11 that cooperates with the adjustment rod 12. A flexible folding tube 9 is located at the top of the collection hood 8, connected to the collection tube 4. The movable end of the adjustment motor 11 engages with the adjustment rack located on the adjustment rod 12. A sampling tube 6 is located on the collection tube 4, and a sealing rubber gasket is installed inside the sampling tube 6.

[0023] The waste collection structure includes a test hole on a test bench 20, within which is an adjustable platform 19. Platform 19 engages with an adjustment column 16 positioned to one side of the test hole. Adjustment grooves are provided on the side of adjustment column 16, which engage with an adjustment cam on the side of platform 19. The adjustment cam is connected to platform 19 via an adjustment shaft. A traction motor 14 is mounted on the bottom surface of test bench 20. The movable end of traction motor 14 is equipped with a traction cam 15 that engages with platform 19.

[0024] A heat-resistant traction line 17 is mounted on the traction cam 15. This traction line 17 is connected to a traction ring 18 on a storage platform 19 via a traction hole and traction pulley 13 provided on a test bench 20. The storage platform 19 has a temperature-controlled chamber within it, and a waste bin is located below the test bench 20, which is compatible with the storage platform 19.

[0025] During use, the sealed door 2 on the reaction box 1 is opened, and the asphalt is placed on the storage table 19 of the test bench 20. The adjusting motor 11 drives the adjusting connecting rod 12 to move downward along the adjusting sleeve 10. The collecting cover 8 moves downward with the adjusting connecting rod 12 and combines with the truncated collecting cylinder 7. The flexible folding tube 9 is stretched to seal the asphalt on the test bench 20. The asphalt is then heated and temperature-controlled in the temperature-control chamber in the storage table 19 to accelerate the production of asphalt volatile organic compounds. The asphalt volatile organic compounds enter the collecting box 5 along the cylindrical collecting cylinder, the collecting cover 8, the flexible folding tube 9, the collecting tube 4, and the collecting valve 3 to realize the collection of asphalt volatile organic compounds. Adsorption resin is placed in the collecting box 5 to facilitate the adsorption of asphalt volatile organic compounds and the detection of asphalt volatile organic compounds after adsorption. During the collection process of asphalt volatile organic compounds, a sampling syringe can be used to insert into the sealing gasket in the sampling tube 6 to sample the asphalt volatile organic compounds in the collecting tube 4, thereby facilitating the rapid sampling and detection of asphalt volatile organic compounds.

[0026] After the collection of volatile organic matter in asphalt is completed, the adsorption resin in the receiving box is taken out and replaced, and the waste after the asphalt volatilization is collected by the waste collection structure. The traction motor 14 releases the traction on the traction cam 15. Under the gravity of the storage table 19, the adjustment cam moves downward along the adjustment groove on the side of the adjustment column 16. After moving to the bottom of the adjustment groove, the adjustment cam stops moving. Under the weight of the storage table 19, the storage table 19 rotates along the adjustment shaft, and the asphalt waste on the storage table 19 is poured into the waste box, completing the cleaning of the waste. Then, the traction motor 14 winds the heat-resistant traction line 17 through the traction cam 15. The heat-resistant traction line 17 drives the storage table 19 back to its original position through the traction hole, traction pulley 13, and traction ring 18, waiting for the waste to be processed again.

[0027] Example 2 An asphalt volatile organic compound collection device differs from Example 1 in that: a protective structure cooperating with a heat-resistant traction line 17 is provided in the traction hole, the protective structure includes a strip-shaped protective plate arranged in the traction hole, the strip-shaped protective plate is provided with a plurality of protective cams with clearance fit, an L-shaped protective rod corresponding one-to-one to the protective cams, an auxiliary cam cooperating with the protective cam is provided on the L-shaped protective rod, and a protective stop rod cooperating with the protective cam is provided on the side of the auxiliary cam away from the L-shaped protective rod.

[0028] The above description is only a preferred embodiment of the present invention, but is not limited to the above examples. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for collecting volatile organic compounds from asphalt, comprising a reaction box, characterized in that: The reaction box is provided with a test bench and a collection structure that cooperates with the test bench. The bottom surface of the reaction box is provided with a waste collection structure that cooperates with the test bench. The collection structure includes a collection cover arranged in the reaction box, and the collection cover cooperates with the frustum collection cylinder arranged on the test bench. The side of the reaction box is provided with a sealing door that cooperates with the test bench.

2. The asphalt volatile organic compound collection device according to claim 1, characterized in that: The reaction box is provided with a collecting pipe matched with the top of the collecting cover, the collecting pipe is provided with a detachable collecting box, and the collecting pipe is provided with a collecting valve.

3. The asphalt volatile organic compound collection device according to claim 2, characterized in that: The collecting cover is provided with an adjusting connecting rod, which cooperates with an adjusting sleeve arranged in the reaction box. The adjusting sleeve is provided with an adjusting motor that cooperates with the adjusting connecting rod. The top of the collecting cover is provided with a flexible folding tube connected to the collecting tube.

4. The asphalt volatile organic compound collection device according to claim 3, characterized in that: The movable end of the regulating motor is engaged with the regulating rack arranged on the regulating connecting rod; the collecting tube is provided with a sampling tube, and a sealing rubber gasket is provided in the sampling tube.

5. The asphalt volatile organic compound collection device according to claim 4, characterized in that: The waste collection structure comprises a test hole arranged on the test table, an adjustable storage platform is provided in the test hole, and the storage platform cooperates with an adjustment column arranged on one side of the test hole.

6. The asphalt volatile organic compound collection device according to claim 5, characterized in that: An adjusting groove is provided on the side of the adjusting column, and the adjusting groove cooperates with an adjusting cam arranged on the side of the storage platform. The adjusting cam is connected to the storage platform through an adjusting shaft.

7. The asphalt volatile organic compound collection device according to claim 6, characterized in that: A traction motor is provided on the bottom surface of the test bench, and a traction cam matched with the storage platform is provided on the movable end of the traction motor.

8. The asphalt volatile organic compound collection device according to claim 7, characterized in that: The traction cam is provided with a heat-resistant traction line, which is connected to a traction ring arranged on the storage platform through a traction hole and a traction pulley arranged on the test platform.

9. The asphalt volatile organic compound collection device according to claim 8, characterized in that: A temperature regulating chamber is provided in the storage table; and a waste box matched with the storage table is provided under the test table.

10. The asphalt volatile organic compound collection device according to claim 1, characterized in that: The frustum collecting cylinder is a heat-insulating cylinder.

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