Flow measuring device for automatic water cutting of chloropropane

Abstract

The invention belongs to the technical field of chloropropane production equipment, and particularly relates to a flow measurement device for automatic water cutting of chloropropane, which comprises a valve body, a valve core assembly, a flow detection assembly, a dielectric constant detection assembly, a vibration tube type densimeter and a control device. The valve body is provided with a liquid inlet pipe, a liquid outlet pipe, a valve element cavity, a pole plate cavity and a liquid taking cavity, the valve element assembly comprises a sliding block, a liquid taking groove, a lead screw and a driving motor, the sliding block is arranged in the valve element cavity in a sliding mode, the flow detection assembly is installed on the liquid inlet pipe, the dielectric constant detection assembly is installed on the valve element assembly and the valve body, and the vibration tube type densimeter is connected with the liquid taking cavity. According to the device, the flow can be monitored through the flow detection assembly, the flow speed is adjusted through the sliding block after the flow reaches a threshold value, the synchronous control device controls and starts multi-parameter detection, the proportion of raw materials or finished products in liquid is accurately recognized, a stop signal is sent out in time, the water cutting detection precision and responsiveness can be improved, and resource waste can be reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of chloropropane production equipment, specifically relating to a flow measurement device for automatic water cutting of chloropropane. Background Technology

[0002] In the field of organic chemistry, chloropropane is an important intermediate raw material. The sophistication of its production process directly determines product quality and production efficiency. Among these processes, the "alcohol chlorination method" has become the mainstream production route due to its mild reaction conditions and readily available raw materials. Raw material pretreatment and product refining are two core steps in this process, requiring the removal of free water from the system through water-cutting operations to ensure reaction efficiency and product purity. With the upgrading of industrial automation and the promotion of green manufacturing policies, automatic water cutters have gradually replaced manual operation and become key equipment in chemical production.

[0003] However, existing water-cutting detection equipment used in the water-cutting stage of chloropropane production largely borrows from general petrochemical technologies, using flow sensors to monitor the discharge process. This approach suffers from insufficient detection accuracy. Traditional detection equipment often relies on a single density detection module, but the density difference between chloropropane feedstock and water is small, and trace byproducts may exist in the reaction system. This makes single-parameter detection prone to misjudgment, resulting in feedstock waste or excessive product moisture content. Furthermore, the coordination between flow rate and component detection is poor. The initial discharge flow rate during water-cutting is large, and existing equipment cannot dynamically adjust detection accuracy based on flow rate changes. Component detection often only activates when the flow rate drops sharply, missing the optimal time for oil cutoff.

[0004] Therefore, it is necessary to study a flow measurement device for automatic water cutting of chloropropane that can solve the problem of insufficient accuracy of automatic water cutting equipment in the "alcohol chlorination method" for producing chloropropane. Summary of the Invention

[0005] In view of the above-mentioned shortcomings in the prior art, the present invention provides a flow measurement device for automatic water cutting of chloropropane, so as to solve the problem of insufficient accuracy in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A flow measurement device for automatic water cutting of chloropropane includes: a valve body, a valve core assembly, a flow detection assembly, a dielectric constant detection assembly, a vibrating tube density meter, and a control device; The valve body is provided with an inlet pipe, an outlet pipe, a valve core cavity, an electrode plate cavity, and a liquid collection cavity. The inlet pipe is located at the upper end of the valve body, the outlet pipe is located at the lower end of the valve body, and a return pipe is provided on the outlet pipe. The valve core cavity and the electrode plate cavity are symmetrically arranged on the valve body, and the liquid collection cavity is located above the valve core cavity. The valve core assembly includes a slider, a liquid collection groove, a lead screw, and a drive motor. The slider is slidably disposed in the valve core cavity, the liquid collection groove is disposed above the slider, and the drive motor is fixedly disposed on the valve body. The drive motor is connected to the slider through the lead screw. When the drive motor rotates, it drives the slider to slide in the valve core cavity through the lead screw. After the slider slides out of the valve core cavity, the liquid collection groove connects to the liquid inlet pipe and the liquid collection cavity. The flow detection component is fixedly installed on the inlet pipe; The dielectric constant detection component is installed on the valve core assembly and the valve body; The vibrating tube density meter is fixedly installed on the valve body, and the vibrating tube density meter is connected to the liquid sampling chamber through a pipe; The control device is fixedly installed on the valve body and is electrically connected to the drive motor, flow detection component, dielectric constant detection component and vibrating tube density meter.

[0007] Furthermore, a guide block is also provided on the inner wall of the valve core cavity.

[0008] Furthermore, the bottom of the slider is provided with a guide groove that slides with the guide block.

[0009] Furthermore, a sealing ring is also provided on the slider, and the sealing ring is provided on the side wall of the slider near the drive motor.

[0010] Furthermore, the flow detection component includes an ultrasonic transmitter and an ultrasonic receiver, which are fixedly mounted on the side wall of the inlet pipe.

[0011] Furthermore, the dielectric constant detection component includes a first electrode plate and a first pull rod. The first pull rod is fixedly connected to the end face of the first electrode plate away from the electrode plate cavity, and the first electrode plate is fixedly mounted on the end face of the slider near the electrode plate cavity via the first pull rod.

[0012] Furthermore, the dielectric constant detection component also includes an electrode plate support, a second electrode plate, and a second pull rod. The electrode plate support is fixedly disposed in the electrode plate cavity, and the second pull rod is fixedly connected to the end face of the second electrode plate near the slider. The second electrode plate is fixedly mounted on the electrode plate support by the second pull rod.

[0013] Furthermore, a conduit is provided on the valve core cavity, and a signal line provided on the control device passes through the conduit and is electrically connected to the first pull rod, and a signal line provided on the control device is electrically connected to the second pull rod.

[0014] Furthermore, the vibrating tube densitometer is provided with a liquid inlet and a liquid outlet. The liquid inlet is connected to the liquid collection chamber through a pipe, and the liquid outlet is connected to the return pipe through a pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention discloses an automatic flow measurement device for water removal in chloropropane production. It monitors the flow rate in real time through a flow detection component. Upon reaching a preset threshold, it drives a slider to adjust the flow rate. Simultaneously, it activates a dielectric constant detection component and a vibrating tube density meter to perform multi-parameter synchronous detection. This allows for accurate identification of the proportion of raw materials or finished products in the discharged liquid, avoiding product moisture content exceeding standards or raw material misjudgment due to single-parameter detection errors. It meets the high water removal accuracy requirements of chloropropane raw material pretreatment and product refining. This effectively improves the detection accuracy and response timeliness of the water removal process in chloropropane production, and effectively solves the problems of easy misjudgment due to single-parameter detection and poor coordination between flow rate and component detection in existing equipment.

[0016] 2. This invention discloses an automatic flow measurement device for chloropropane water cutting. The guide-fit structure between the slider and the valve core cavity prevents slider rotation from affecting sampling accuracy. The sealing ring design prevents liquid leakage and ensures stable equipment operation. Simultaneously, the synergistic effect of slider flow rate adjustment and multi-parameter detection allows for timely issuance of a stop signal when the detected raw material or finished product percentage reaches a threshold, shortening the interval between signal issuance and water cutting cessation. This reduces ineffective discharge of raw materials or finished products during the process, lowering production losses. It effectively reduces resource waste during production and improves equipment stability, solving the problems of raw material waste caused by sealing failure, guide deviation, and response lag in existing equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a top view of the present invention; Figure 3 When the slider is fully retracted Figure 2 Cross-sectional view of line AA; Figure 4 When the slider extends from the valve core cavity Figure 2 Cross-sectional view of line AA; Figure 5 Schematic diagram of the slider structure Figure 1 ; Figure 6 Schematic diagram of the slider structure Figure 2 ; Figure 7 This is a schematic diagram of the valve body.

[0018] The reference numerals used in the attached figures are as follows: 1. Valve body; 11. Inlet pipe; 12. Outlet pipe; 121. Return pipe; 13. Valve core cavity; 131. Guide block; 132. Conduit; 14. Electrode cavity; 15. Liquid collection cavity; 2. Valve core assembly; 21. Slider; 22. Liquid collection groove; 23. Guide groove; 24. Sealing ring; 25. Lead screw; 26. Drive motor; 3. Flow detection assembly; 31. Ultrasonic transmitter; 32. Ultrasonic receiver; 4. Dielectric constant detection assembly; 41. First electrode plate; 42. First pull rod; 43. Electrode plate support; 44. Second electrode plate; 45. Second pull rod; 5. Vibrating tube density meter; 51. Inlet; 52. Outlet; 6. Control device. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0021] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0022] Please see Figures 1 to 7 As shown, an automatic flow measurement device for chloropropane water cutting includes: a valve body (1), a valve core assembly (2) for sampling and controlling the liquid flow rate, a flow detection assembly (3) for real-time monitoring of liquid flow rate, a dielectric constant detection assembly (4) for detecting the dielectric constant of the liquid, a vibrating tube densitometer (5) for detecting the liquid concentration, and a control device (6) for collecting signals and issuing commands.

[0023] The valve body (1) is provided with an inlet pipe (11), an outlet pipe (12), a valve core cavity (13), an electrode plate cavity (14), and a liquid collection cavity (15). The inlet pipe (11) is located at the upper end of the valve body (1), and the outlet pipe (12) is located at the lower end of the valve body (1). That is, the liquid flows in through the inlet pipe (11), passes through the valve body (1), and flows out through the outlet pipe (12). A return pipe (121) is provided on the outlet pipe (12). The liquid that has been detected in the vibrating tube densitometer (5) returns to the outlet pipe (12) through the return pipe (121). The valve core cavity (13) and the electrode plate cavity (14) are symmetrically arranged on the valve body (1), and the liquid collection cavity (15) is located above the valve core cavity (13).

[0024] The valve core assembly (2) includes a slider (21), a liquid collection tank (22), a lead screw (25), and a drive motor (26). The slider (21) is slidably disposed in the valve core cavity (13), and the drive motor (26) is fixedly disposed on the valve body (1). The drive motor (26) is connected to the slider (21) through the lead screw (25). The drive motor (26) rotates and drives the slider (21) to slide in the valve core cavity (13) through the lead screw (25). It should be noted that after the slider (21) slides out of the valve core cavity (13), the valve body (1) obstructs the liquid flow, thereby reducing the liquid flow rate. This not only shortens the distance between the first electrode plate (41) and the second electrode plate (44) of the dielectric constant detection assembly (4), but also reduces the waste of raw materials or finished products caused during the process from the control device (6) issuing a stop signal to stopping the water cutting.

[0025] Specifically, a guide block (131) is provided on the inner wall of the valve core cavity (13), and a guide groove (23) is provided at the bottom of the slider (21) to slide in cooperation with the guide block (131). It can be understood that the cooperation between the guide block (131) and the guide groove (23) can prevent the slider (21) from rotating during sliding, which would prevent the sample liquid in the liquid collection tank (22) from entering the liquid collection chamber (15).

[0026] Specifically, a sealing ring (24) is also provided on the slider (21), and the sealing ring (24) is provided on the side wall of the slider (21) near the drive motor (26). It can be understood that the sealing ring (24) can prevent liquid from entering the rear of the slider (21) through the gap between the slider (21) and the inner wall of the valve core cavity (13) and leaking out of the equipment through the conduit (132).

[0027] The liquid collection groove (22) is located above the slider (21). It should be noted that after the slider (21) is driven out of the valve core cavity (13), one end of the liquid collection groove (22) at the upper end of the slider (21) slides out of the valve core cavity (13), and the other end of the liquid collection groove (22) is connected to the liquid collection cavity (15). That is, after the slider (21) is driven out of the valve core cavity (13), the liquid collection groove (22) is connected to the liquid inlet pipe (11) and the liquid collection cavity (15).

[0028] The flow detection component (3) is fixedly installed on the inlet pipe (11). Specifically, the flow detection component (3) includes an ultrasonic transmitter (31) and an ultrasonic receiver (32), which are fixedly disposed on the side wall of the inlet pipe (11). Preferably, the ultrasonic transmitter (31) and the ultrasonic receiver (32) are obliquely opposed to the axis of the inlet pipe (11) at a 45° angle.

[0029] The dielectric constant detection component (4) is installed on the valve core assembly (2) and the valve body (1).

[0030] Specifically, the dielectric constant detection component (4) includes a first electrode plate (41) and a first pull rod (42). The first pull rod (42) is fixedly connected to the end face of the first electrode plate (41) away from the electrode cavity (14). The first electrode plate (41) is fixedly installed on the end face of the slider (21) near the electrode cavity (14) by the first pull rod (42).

[0031] The dielectric constant detection component (4) further includes an electrode support (43), a second electrode (44), and a second pull rod (45). The electrode support (43) is fixedly disposed in the electrode cavity (14), and the second pull rod (45) is fixedly connected to the end face of the second electrode (44) near the slider (21). The second electrode (44) is fixedly mounted on the electrode support (43) by the second pull rod (45).

[0032] It can be understood that the first plate (41) and the second plate (44) form a parallel plate capacitor, which is used to detect the dielectric constant of the liquid flowing between them.

[0033] Specifically, a conduit (132) is provided on the valve core cavity (13), and the signal line provided on the control device (6) passes through the conduit (132) and is electrically connected to the first pull rod (42), and the signal line provided on the control device (6) is electrically connected to the second pull rod (45).

[0034] The vibrating tube densitometer (5) is fixedly installed on the valve body (1) and is connected to the liquid collection chamber (15) through a pipe. Specifically, the vibrating tube densitometer (5) is provided with an inlet (51) and an outlet (52). The inlet (51) is connected to the liquid collection chamber (15) through a pipe, and the outlet (52) is connected to the return pipe (121) through a pipe. It can be said that after the sample liquid enters the liquid collection chamber (15) through the liquid collection tank (22), it enters the inlet (51) of the vibrating tube densitometer (5) through the pipe. After the density of the sample liquid is detected, the sample liquid returns to the outlet pipe (12) through the outlet (52), the pipe, and the return pipe (121).

[0035] The control device (6) is fixedly installed on the valve body (1), and the control device (6) is electrically connected to the drive motor (26), the flow detection component (3), the dielectric constant detection component (4) and the vibrating tube density meter (5).

[0036] The principle of this invention is as follows: During the water cutting operation, the liquid enters the detection device through the inlet pipe (11).

[0037] In the initial stage of water cutting, the drive motor (26) rotates and drives the slider (21) to slide into the valve core cavity (13) through the lead screw (25). When the slider (21) is completely retracted into the valve core cavity (13), the flow detection component (3) detects the flow rate of the liquid.

[0038] During the later stages of water cutting, after the flow detection component (3) detects the preset threshold, the control device (6) controls the drive motor (26) to rotate and drive the slider (21) to slide out of the valve core cavity (13) via the lead screw (25). The liquid collection groove (22) on the slider (21) slides out of the valve core cavity (13) at least partially. It should be noted that after the slider (21) slides out of the valve core cavity (13) completely, the liquid collection groove (22) is still connected to the valve core cavity (13), and at the same time, the distance between the first electrode plate (41) and the second electrode plate (44) is reduced. The liquid in the inlet pipe (11) flows into the liquid collection chamber (15) through the liquid collection groove (22).

[0039] The dielectric constant detection component (4) detects the dielectric constant of the liquid flowing between the first electrode plate (41) and the second electrode plate (44).

[0040] The sample liquid in the liquid collection chamber (15) enters the inlet (51) of the vibrating tube densitometer (5) through the pipe. After the density of the sample liquid is detected, the sample liquid returns to the outlet pipe (12) through the outlet (52), the pipe and the return pipe (121).

[0041] After the data detected by the flow detection component (3), dielectric constant detection component (4), and vibrating tube density meter (5) all reach the threshold, the control device (6) issues a stop signal to stop the water cutting operation.

[0042] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics of the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A flow measuring device for automatic water cut of chloropropane, characterized by, The utility model relates to a valve body (1), valve core subassembly (2), flow detection subassembly (3), dielectric constant detection subassembly (4), vibrating tube densimeter (5) and control device (6) are included. The liquid inlet pipe (11) is arranged on the upper end of the valve body (1), the liquid outlet pipe (12) is arranged on the lower end of the valve body (1), the liquid outlet pipe (12) is provided with a backflow pipe (121), the valve core cavity (13) and the polar plate cavity (14) are symmetrically arranged on the valve body (1), and the liquid taking cavity (15) is arranged above the valve core cavity (13). The valve core subassembly (2) includes a sliding block (21), a liquid taking groove (22), a lead screw (25) and a drive motor (26), the sliding block (21) is slidingly arranged in the valve core cavity (13), the liquid taking groove (22) is arranged above the sliding block (21), the drive motor (26) is fixedly arranged on the valve body (1), the drive motor (26) is connected with the sliding block (21) through the lead screw (25), the drive motor (26) rotates, drives the sliding block (21) to slide in the valve core cavity (13) through the lead screw (25), and the liquid taking groove (22) is communicated with the liquid inlet pipe (11) and the liquid taking cavity (15) after the sliding block (21) slides out of the valve core cavity (13). The flow detection subassembly (3) is fixedly installed on the liquid inlet pipe (11). The dielectric constant detection subassembly (4) is installed on the valve core subassembly (2) and the valve body (1). The vibrating tube densimeter (5) is fixedly installed on the valve body (1), and the vibrating tube densimeter (5) is connected with the liquid taking cavity (15) through a pipeline. The control device (6) is fixedly installed on the valve body (1), and the control device (6) is electrically connected with the drive motor (26), the flow detection subassembly (3), the dielectric constant detection subassembly (4) and the vibrating tube densimeter (5). The guiding block (131) is further arranged on the inner wall of the valve core cavity (13).

2. The flow measuring device for automatic water cutting of chloropropane according to claim 1, characterized in that: The bottom of the sliding block (21) is provided with a guide groove (23) in sliding cooperation with the guiding block (131).

3. The flow measuring device for automatic water cutting of chloropropane according to claim 2, characterized in that: The sealing ring (24) is further arranged on the sliding block (21), and the sealing ring (24) is arranged on the side wall of the sliding block (21) close to the drive motor (26).

4. The flow measuring device for automatic water cutting of chloropropane according to claim 1, characterized in that: The flow detection subassembly (3) includes an ultrasonic wave transmitter (31) and an ultrasonic wave receiver (32), and the ultrasonic wave transmitter (31) and the ultrasonic wave receiver (32) are fixedly arranged on the side wall of the liquid inlet pipe (11).

5. The flow measuring device for automatic water cutting of chloropropane according to claim 1, characterized in that: The dielectric constant detection subassembly (4) includes a first polar plate (41) and a first pull rod (42), the first pull rod (42) is fixedly connected to the end face of the first polar plate (41) away from the polar plate cavity (14), and the first polar plate (41) is fixedly installed on the end face of the sliding block (21) close to the polar plate cavity (14) through the first pull rod (42).

6. The flow measuring device for automatic water cutting of chloropropane according to claim 1, characterized in that: ​ 7. The flow measuring device for automatic water cut of chloropropane according to claim 6, characterized in that: The dielectric constant detection assembly (4) further comprises a polar plate support (43), a second polar plate (44) and a second pull rod (45), the polar plate support (43) is fixedly arranged in the polar plate cavity (14), the second pull rod (45) is fixedly connected to the end face of the second polar plate (44) on the side close to the sliding block (21), and the second polar plate (44) is fixedly installed on the polar plate support (43) through the second pull rod (45).

8. The flow measuring device for automatic water cutting of chloropropane according to claim 7, characterized in that: A wire tube (132) is further arranged on the valve core cavity (13), a signal line arranged on the control device (6) is electrically connected with the first pull rod (42) through the wire tube (132), and the signal line arranged on the control device (6) is electrically connected with the second pull rod (45).

9. The flow measuring device for automatic water cut of chloropropane according to claim 1, characterized in that: The vibration tube type density meter (5) is provided with a liquid inlet (51) and a liquid outlet (52), the liquid inlet (51) is connected with the liquid taking cavity (15) through a pipeline, and the liquid outlet (52) is connected with the backflow pipe (121) through a pipeline.

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