Device and method for rapidly detecting ethyl acetate on line

Abstract

The invention discloses a device and a method for rapidly detecting ethyl acetate on line, and particularly relates to ethyl acetate detection equipment, the device comprises a floating densimeter and also comprises a temperature adjusting measuring cylinder, the temperature adjusting measuring cylinder comprises an outer cylinder and an inner cylinder, and the inner cylinder is used for bearing a solution and the floating densimeter; and the temperature adjusting assembly comprises a ceramic refrigeration sheet with a cold end and a hot end, the cold end and the hot end are each provided with a pipeline, the two ends of each pipeline communicate with the inner cylinder, and the solution flows and circulates along the pipelines so as to adjust the temperature. The ceramic refrigeration sheet is electrified, the two pipelines are heated by the hot end and the cold end, so that sample solutions in the two pipelines are exchanged according to the temperature of a sample, the temperature of the sample in the temperature-adjusting measuring cylinder is adjusted for temporary density detection, the whole implementation process is convenient, and the detection efficiency is high. And the density is detected at a lower price, so that the method is more suitable for detection on a production line.

Description

Technical Field

[0001] The present invention relates to the technical field of ethyl acetate detection, and in particular to a device and method for online rapid detection of ethyl acetate. Background Art

[0002] Ethyl acetate is an organic compound that can be widely used as a solvent, food flavor and medicine.

[0003] In industrial production, after ethyl acetate is produced, it is sampled and rapidly tested using a density meter, refractometer, and portable GC to determine batch quality on-site.

[0004] According to patent number CN1061284A, published (announced) date: 1992-05-20, a density meter specifically used for measuring vegetable oil is disclosed.

[0005] According to patent number CN2516964Y, published (announced) date: 2002-10-16, a density meter is disclosed.

[0006] In the prior art including the above-mentioned patent, the glass float-type density meter has the advantages of high precision and low cost. However, when testing batch-produced ethyl acetate in an industrial environment, constant temperature equipment such as a water bath and a constant temperature environment are often lacking. The vibration-type density meter that does not require a constant temperature environment is difficult to move and is expensive. Summary of the Invention

[0007] The purpose of the present invention is to provide a device and method for online rapid detection of ethyl acetate, aiming to solve the above-mentioned problems.

[0008] In order to achieve the above object, the present invention provides the following technical solution: an online rapid detection device for ethyl acetate, comprising a floating water density meter, and a temperature-controlled measuring cylinder comprising an outer cylinder and an inner cylinder, wherein the inner cylinder is used to carry a solution and the floating water density meter; The temperature regulating component includes a ceramic refrigeration plate with a cold end and a hot end. The cold end and the hot end are respectively provided with pipes connected to the inner cylinder at both ends. The solution circulates along the pipes to regulate the temperature.

[0009] Preferably, the hot end is provided with a heat dissipation fin, the heat dissipation fin is provided with a fan, the heat dissipation fin is provided with a heat flow pipe, and both ends of the heat flow pipe are respectively connected to the bottom of the inner cylinder.

[0010] Preferably, a hollow heat conduction plate is provided on the cold end, and two ends of the heat conduction plate are respectively connected to the bottom and the inner wall of the inner cylinder, and a guide ring groove is provided on the inner wall of the inner cylinder.

[0011] Preferably, a driving assembly is further included, which includes an infusion wheel symmetrically connected to the bottom of the inner cylinder, the infusion wheel is movably connected to the two pipeline outlets respectively, and an infusion paddle is provided in the infusion wheel.

[0012] Preferably, the temperature-controlled measuring cylinder is rotatably connected to a driving wheel, a one-way wheel is coupled between the driving wheel and the infusion wheel, and the driving wheel rotates clockwise or counterclockwise to drive the one-way wheel to drive the single infusion wheel to rotate.

[0013] Preferably, the one-way wheel is rotatably connected with coupling teeth and a limiting cover plate in a circular array, and the limiting cover plate is provided with protrusions corresponding to the coupling teeth one by one.

[0014] Preferably, a liquid adding cylinder is further included, with filter paper and a sealing plate provided at both ends thereof respectively. The liquid adding cylinder is provided with a through hole communicating with the temperature conducting plate, and the temperature conducting plate is driven to infuse pressurized liquid into the liquid adding cylinder.

[0015] Preferably, a fixing frame is clamped on the liquid adding cylinder, an arc bridge is provided on the fixing frame, and the fixing frame is driven and clamped in the guide ring groove.

[0016] Preferably, a guide platform is provided on the arc bridge, and a guide angle is provided on the fixing frame.

[0017] A method for rapid online detection of ethyl acetate specifically comprises the following steps: S01, put the sample solution into the liquid adding cylinder and install the filter paper, then buckle the liquid adding cylinder onto the inner cylinder to filter the sample solution; S02. After filtration, remove the liquid adding cylinder and rotate the driving wheel to adjust the temperature of the sample solution in the inner cylinder to 20±0.2℃.

[0018] S03. Place the floating water densitometer into the inner cylinder to measure the density of the sample solution.

[0019] In the above technical solution, the present invention provides an online rapid detection device and method for ethyl acetate, which has the following beneficial effects: by energizing the ceramic refrigeration plate, the hot end and the cold end heat the two pipes, thereby exchanging the sample solutions in the two pipes according to the temperature of the sample, thereby adjusting the temperature of the sample in the temperature-controlled measuring cylinder for temporary density detection. The entire implementation process is convenient, and the density is detected at a lower price, which is more suitable for detection on the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 An overall schematic diagram provided for an embodiment of the present invention; Figure 2 A schematic diagram of an explosion of a liquid adding cylinder provided in an embodiment of the present invention; Figure 3 for Figure 2 A in the middle is an enlarged schematic diagram; Figure 4 Schematic diagram of a temperature-controlled graduated cylinder and a floating water density meter provided in an embodiment of the present invention; Figure 5 A schematic diagram of a temperature-controlled graduated cylinder and a floating water density explosion provided in an embodiment of the present invention; Figure 6 A schematic diagram of an inner cylinder provided in an embodiment of the present invention; Figure 7 An exploded schematic diagram of a drive assembly provided in an embodiment of the present invention; Figure 8 An exploded schematic diagram of a temperature control assembly provided in an embodiment of the present invention; Figure 9 for Figure 8 The enlarged schematic diagram of point B in the middle; Figure 10 A schematic diagram of an inner drum and a driving wheel provided in an embodiment of the present invention; Figure 11 A schematic cross-sectional view of an overall embodiment of the present invention; Figure 12 for Figure 11 Enlarged schematic diagram at point C in the middle; Figure 13 A schematic cross-sectional view of the entire embodiment of the present invention from another perspective; Figure 14 A schematic cross-sectional view of an embodiment of the present invention; Figure 15 for Figure 14 Enlarged schematic diagram at point D in the middle.

[0022] Description of reference numerals: 1. Temperature-controlled measuring cylinder; 11. Inner cylinder; 111. Concave groove; 112. Liquid outlet; 113. Guide ring groove; 12. Floating water density meter; 2. Temperature-controlled assembly; 20. Fan; 21. Ceramic cooling plate; 22. Heat sink fin; 221. Heat flow pipe; 222. Connecting part; 223. Expansion head; 23. Temperature guide plate; 231. Liquid inlet pipe; 232. Cold liquid outlet pipe; 3. Drive assembly; 3 1. Driving wheel; 312. Driving gear; 32. One-way wheel; 321. Coupling gear; 322. Rotating shaft; 323. Limiting cover; 3231. Protrusion; 324. Elastic limiting ring; 33. Infusion wheel; 331. Infusion paddle; 4. Dosing cylinder; 41. Closing plate; 411. Shielding plate; 42. Filter paper; 43. Fixing frame; 431. Arc bridge; 432. Diversion platform; 433. Diversion angle. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0024] Example 1 like Figure 1-15 As shown, an online rapid detection device for ethyl acetate includes a floating water density meter 12 and a temperature-controlled measuring cylinder 1, which includes an outer cylinder and an inner cylinder 11, wherein the inner cylinder 11 is used to carry the sample solution and the floating water density meter 12; The temperature regulating component 2 includes a ceramic refrigeration plate 21 with a cold end and a hot end. The cold end and the hot end are respectively provided with pipes connected to the inner cylinder 11 at both ends. The sample solution circulates along the pipes to regulate the temperature.

[0025] Specifically, a hollow interlayer is provided between the temperature-regulating measuring cylinder 1 and the inner cylinder 11. The hollow interlayer is used to reduce the temperature change in the inner cylinder 11 and maintain the temperature in the inner cylinder 11 after the temperature is adjusted. The temperature-regulating measuring cylinder 1 and the inner cylinder 11 can be made of transparent glass or a transparent special plastic barrel, which is convenient for observing the scale of the floating water density meter 12. The ceramic refrigeration plate 21 is provided at the bottom of the temperature-regulating measuring cylinder 1. When the ceramic refrigeration plate 21 is powered on and started, the cold end will cool down and the hot end will heat up to heat the two pipes at the same time. At this time, depending on whether the temperature in the inner cylinder 11 is higher than 20°C or lower than 20°C, the liquid in one of the pipes is driven to exchange with the liquid in the inner cylinder 11, thereby adjusting the temperature of the inner cylinder 11.

[0026] In the above technical solution, by energizing the ceramic refrigeration plate 21, the hot end and the cold end heat the two pipes, so that the sample solutions in the two pipes are exchanged according to the temperature of the sample, thereby adjusting the temperature of the sample in the temperature-controlled measuring cylinder 1 for temporary density detection. The entire implementation process is convenient, and the density is detected at a lower price, which is more suitable for detection on the production line.

[0027] Furthermore, when adjusting the temperature, a thermometer is inserted into the inner cylinder 11 to measure the temperature.

[0028] As an embodiment provided by the present invention, a heat dissipation fin 22 is provided on the hot end, a fan 20 is provided on the heat dissipation fin 22, a heat flow pipe 221 is provided on the heat dissipation fin 22, and both ends of the heat flow pipe 221 are respectively connected to the bottom of the inner tube 11.

[0029] Specifically, thermal grease is provided between the hot end and the heat sink fins 22 to assist in heat conduction. The fan 20 is fixed to the bottom of the temperature-controlled measuring cylinder 1 by screws to dissipate the heat generated by the hot end. The fan 20 and the ceramic refrigeration plate 21 can be electrically connected to an external power source via a cable, or a battery can be provided at the bottom of the temperature-controlled measuring cylinder 1. The heat flow tube 221 passes through the heat sink fins 22 to guide the heat flow to the heat flow tube 221 when the fan 20 dissipates heat, thereby heating the heat flow tube 221. One end of the heat flow tube 221 is a liquid outlet, which is provided at the center of the bottom of the inner cylinder 11. The liquid outlet is provided with an expansion head 223, which is a cone. When the liquid outlet discharges liquid, the heat flow expands outward along the cone, thereby causing the rapid hot flow liquid to diffuse within the inner cylinder 11, thereby accelerating the heat flow into the sample within the inner cylinder 11.

[0030] Furthermore, a hollow heat conduction plate 23 is provided on the cold end, and the temperature of the heat conduction plate 23 decreases as the temperature of the cold end decreases. The two ends of the heat conduction plate 23 are respectively connected with a liquid inlet pipe 231 and a cold liquid outlet pipe 232. The liquid inlet pipe 231 is connected to the bottom of the inner cylinder 11, and the inner cylinder 11 is provided with a recessed groove 111 to which the cold liquid outlet pipe 232 is fixed. The recessed groove 111 is provided with a liquid outlet hole 112, and the liquid outlet hole 112 is the outlet of the cold liquid outlet pipe 232, so that the liquid after the temperature of the heat conduction plate 23 is cooled flows out from the liquid outlet hole 112 to cool the liquid in the inner cylinder 11. A guide ring groove 113 is provided on the inner wall of the inner cylinder 11. When the cooled liquid flows out from the liquid outlet hole 112, it will surround the guide ring groove 113 under the guidance of the guide ring groove 113, thereby diffusing the cooled liquid and accelerating the cold flow into the sample in the inner cylinder 11.

[0031] As an embodiment provided by the present invention, it also includes a driving assembly 3, which includes an infusion wheel 33 symmetrically connected to the bottom of the inner tube 11, the infusion wheel 33 is movably connected to the two pipeline outlets respectively, and an infusion paddle 331 is provided in the infusion wheel 33.

[0032] Specifically, the two pipes are the cold liquid outlet pipe 232 and the heat flow pipe 221. The outlets of the cold liquid outlet pipe 232 and the heat flow pipe 221 are both provided with a connection portion 222. The infusion wheel 33 is rotatably connected to the connection portion 222. When the temperature in the inner cylinder 11 needs to be adjusted, the infusion wheel 33 is driven to rotate, so that the infusion paddle 331 sends the sample liquid in the inner cylinder 11 to the cold liquid outlet pipe 232 or the heat flow pipe 221, thereby completing the circulation of the liquid in the pipe. The two infusion wheels 33 can only operate individually.

[0033] Furthermore, the temperature-controlled measuring cylinder 1 is rotatably connected to a driving wheel 31. The outer ring of the driving wheel 31 is an outer wheel with a recess. The inner wall of the driving wheel 31 is provided with a driving tooth 312 for coupling. A one-way wheel 32 is coupled between the driving wheel 31 and the infusion wheel 33. There are two one-way wheels 32, which drive the driving wheel 31 individually. The driving wheel 31 rotates clockwise or counterclockwise to drive the one-way wheel 32 to drive the single infusion wheel 33 to rotate, thereby realizing circulation between the cold liquid outlet pipe 232 or the hot flow pipe 221 and the inner cylinder 11.

[0034] When the cam 321 is in the unlocked position, the locking cam 323 is in the unlocked position, and the locking cam 323 is in the unlocked position, so that the cam 321 is unlocked and the locking cam 323 is unlocked.

[0035] As an embodiment provided by the present invention, it also includes a liquid adding cylinder 4, which has filter paper 42 and a sealing plate 41 at both ends respectively. The liquid adding cylinder 4 is provided with a through hole connected to the heat conducting plate 23, and the heat conducting plate 23 is driven to infuse and pressurize the liquid into the liquid adding cylinder 4.

[0036] Specifically, the liquid adding cylinder 4 is made of glass, and a shielding plate 411 is provided on the outside of the liquid adding cylinder 4. The shielding plate 411 is made of elastic plastic and is used to shield the perforation opened on the liquid adding cylinder 4. The sealing plate 41 is threadedly connected to the liquid adding cylinder 4 to seal the liquid. The specification of the filter paper 42 is 42um and is used to filter impurities in the ethyl acetate solution to increase the detection accuracy. When in use, the sealing plate 41 is first threadedly connected to the liquid adding cylinder 4, and then a sample is taken from the prepared ethyl acetate solution. After sampling, the filter paper 42 is fixed in the liquid adding cylinder 4, and then the perforation of the liquid adding cylinder 4 is aligned with the liquid outlet hole 112 on the inner wall of the inner cylinder 11. At this time, the filter paper 42 filters the liquid in the liquid adding cylinder 4. Then, the driving wheel 31 can be rotated without powering on the ceramic refrigeration plate 21, so that the infusion wheel 33 discharges air to the cold liquid outlet pipe 232 through the infusion paddle 331, so as to increase the air pressure in the liquid adding cylinder 4 and reduce the air pressure in the inner cylinder 11, thereby accelerating the filtration speed of the filter paper 42.

[0037] Furthermore, a fixing frame 43 is clamped on the liquid-adding cylinder 4, and the fixing frame 43 is used to fix the filter paper 42. An arc bridge 431 is provided on the fixing frame 43, and a guide platform 432 is provided on the arc bridge 431. When the filter paper 42 filters the liquid, the liquid tends to drip along the center, and is thus received by the arc bridge 431 arranged in a circular array. At this time, the liquid flows along the arc bridge 431 to the guide platform 432 and moves along the guide platform 432 toward the side wall of the fixing frame 43. The fixing frame 43 is driven and clamped in the guide ring groove 113. A guide angle 433 is provided on the fixing frame 43. The sample solution drips into the guide ring groove 113 along the guide angle 433, so that the sample solution flows out along the guide ring groove 113 as much as possible and then flows down along the inner wall of the inner cylinder 11, thereby reducing the generation of bubbles.

[0038] Example 2 A method for rapid online detection of ethyl acetate specifically comprises the following steps: S01. After the sample solution is placed in the liquid adding cylinder 4 and the filter paper 42 is fixed in the liquid adding cylinder 4, the fixing frame 43 is clamped in the liquid adding cylinder 4 to fix the filter paper 42. Then, the liquid adding cylinder 4 is buckled onto the inner cylinder 11 to filter the sample solution. At this time, the perforation of the liquid adding cylinder 4 is aligned with the liquid outlet hole 112 on the inner wall of the inner cylinder 11. Then, the driving wheel 31 is rotated to drive the infusion wheel 33 to rotate, and the air is discharged to the cold liquid outlet pipe 232 through the infusion paddle 331 to increase the air pressure in the liquid adding cylinder 4 and reduce the air pressure in the inner cylinder 11, thereby accelerating the filtration speed of the filter paper 42; S02. After filtering, remove the liquid adding cylinder 4 and place a thermometer in the inner cylinder 11 to detect the temperature of the sample. Then, rotate the driving wheel 31 according to the temperature difference, so that the driving wheel 31 drives the infusion wheel 33 to rotate and transport the liquid in the sample into the heat flow pipe 221. After passing through the heat dissipation fins 22, the liquid is sprayed toward the expansion head 223 for circulation (or enters the temperature conduction plate 23 into the liquid inlet pipe 231 for cooling and is discharged from the cold liquid outlet pipe 232). The temperature of the sample solution in the inner cylinder 11 is adjusted to 20±0.2°C.

[0039] S03. Place the floating water densitometer 12 into the inner cylinder 11 to measure the density of the sample solution.

[0040] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. An online rapid detection device for ethyl acetate, comprising a floating water density meter (12), characterized in that: It also includes a temperature-controlled measuring cylinder (1), which includes an outer cylinder and an inner cylinder (11), wherein the inner cylinder (11) is used to carry a solution and a floating water density meter (12); The temperature regulating component (2) comprises a ceramic refrigeration plate (21) having a cold end and a hot end, wherein the cold end and the hot end are respectively provided with pipes whose two ends are connected to the inner cylinder (11), and the solution circulates along the pipes to regulate the temperature.

2. A device for online rapid detection of ethyl acetate according to claim 1, characterized in that, A heat dissipation fin (22) is provided on the hot end, a fan (20) is provided on the heat dissipation fin (22), a heat flow pipe (221) is provided on the heat dissipation fin (22), and both ends of the heat flow pipe (221) are respectively connected to the bottom of the inner cylinder (11).

3. A device for online rapid detection of ethyl acetate according to claim 1, characterized in that, A hollow heat conduction plate (23) is provided on the cold end, and two ends of the heat conduction plate (23) are respectively connected to the bottom and inner wall of the inner cylinder (11), and a flow guide ring groove (113) is provided on the inner wall of the inner cylinder (11).

4. A device for online rapid detection of ethyl acetate according to claim 1, characterized in that, It also includes a driving assembly (3), which includes an infusion wheel (33) symmetrically connected to the bottom of the inner cylinder (11), the infusion wheel (33) being movably connected to the two pipeline outlets respectively, and an infusion paddle (331) is provided in the infusion wheel (33).

5. A device for online rapid detection of ethyl acetate according to claim 4, characterized in that, The temperature-adjusting measuring cylinder (1) is rotatably connected to a driving wheel (31), and a one-way wheel (32) is coupled between the driving wheel (31) and the infusion wheel (33). The driving wheel (31) rotates clockwise or counterclockwise to drive the one-way wheel (32) to drive the single infusion wheel (33) to rotate.

6. A device for online rapid detection of ethyl acetate according to claim 5, characterized in that, The one-way wheel (32) is rotatably connected to coupling teeth (321) and a limiting cover plate (323) in a circular array, and the limiting cover plate (323) is provided with protrusions (3231) corresponding one-to-one to the coupling teeth (321).

7. A device for online rapid detection of ethyl acetate according to claim 3, characterized in that, It also includes a liquid adding cylinder (4), with filter paper (42) and a sealing plate (41) provided at both ends thereof, and a through hole communicating with the heat conducting plate (23) is provided on the liquid adding cylinder (4), and the heat conducting plate (23) is driven to infuse pressurized liquid into the liquid adding cylinder (4).

8. A device for online rapid detection of ethyl acetate according to claim 7, characterized in that, A fixing frame (43) is clamped on the liquid adding cylinder (4), an arc bridge (431) is provided on the fixing frame (43), and the fixing frame (43) is driven and clamped in the guide ring groove (113).

9. A device for online rapid detection of ethyl acetate according to claim 8, characterized in that, A flow guide platform (432) is provided on the arc bridge (431), and a flow guide angle (433) is provided on the fixing frame (43).

10. A method for rapid online detection of ethyl acetate, characterized in that: The device for online rapid detection of ethyl acetate according to any one of claims 1 to 9 comprises the following steps: S01, placing the sample solution into the liquid adding cylinder (4) and installing the filter paper (42), then snapping the liquid adding cylinder (4) onto the inner cylinder (11) to filter the sample solution; S02. After filtration, the liquid adding cylinder (4) is removed and the driving wheel (31) is rotated to adjust the temperature of the sample solution in the inner cylinder (11) so that the temperature of the sample solution reaches 20±0.2°C; S03. Place the floating water densitometer (12) into the inner cylinder (11) to measure the density of the sample solution.

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