Cold box liquid leakage detection equipment
By designing an active detection mechanism, the leakage induction line is driven to move back and forth, timely detection and early warning of liquid leakage in the cold box is achieved, the problem of low detection efficiency in the existing technology is solved, and safety is improved.
Patent Information
- Application Number
- CN202421657976.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-07-15
AI Technical Summary
The existing cold box liquid leakage detection equipment passively detects, and the early warning will be issued before the liquid leakage reaches a certain level. The detection and early warning efficiency is low.
A cold box leakage detection equipment is designed, and an active detection mechanism is used to actively detect fluid leakage by driving the leakage induction line to move back and forth, including screw rods, guide columns, sliders, detection components, limit wheels, motors, microcontrollers and signal transceivers, to achieve timely detection and early warning.
It improves the detection efficiency of liquid leakage in the cold box, can detect liquid leakage in a timely manner and issue early warnings, reducing the occurrence of safety hazards.
Smart Images
Figure CN223005672U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cold box liquid leakage detection, in particular to cold box liquid leakage detection equipment. Background Technique
[0002] A cold box is a group of highly efficient and adiabatic cryogenic heat exchange equipment, which is often used in the cryogenic separation process. For example, in the cryogenic separation process of petroleum cracking gas, a cold box operating at about -100 to -140 °C is used. The cold box consists of a highly efficient plate-fin heat exchanger with a compact structure and a gas-liquid separator. Because low temperature is extremely prone to heat dissipation, extremely strict adiabatic insulation is required. Therefore, the heat exchanger and the separator are both packaged in a box-shaped object with heat-insulating materials, which is called a cold box. Leakage is a common phenomenon in the use of plate-fin heat exchangers. This is because the plate-fin heat exchanger shrinks at low temperatures, which may cause leakage at some flanges. Cold box liquid leakage detection equipment is needed for detection and early warning. The existing cold box liquid leakage detection equipment collects leaked liquid by setting a collection tray at the bottom of the cold box. A water leakage induction wire is arranged inside the collection tray. When the leaked liquid contacts the water leakage induction wire, the water leakage induction wire is short-circuited and the equipment is turned on to realize the detection and early warning of liquid leakage. The traditional cold box liquid leakage detection equipment detects passively. It needs to leak a certain amount of liquid, and only when the liquid contacts the water leakage induction wire will it give an early warning. The detection and early warning efficiency is low. Therefore, we propose cold box liquid leakage detection equipment. Content of the Utility Model
[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide cold box liquid leakage detection equipment, which can actively detect the liquid leakage of the cold box. By driving the water leakage induction wire to move back and forth, it can actively detect the liquid leakage situation, can detect the cold box liquid leakage situation in time and give an early warning, improves the detection efficiency of cold box liquid leakage, and reduces the occurrence of potential safety hazards, and can effectively solve the problems in the background technique.
[0004] To achieve the above purpose, the utility model provides the following technical scheme: Cold box liquid leakage detection equipment, including a collection tray and an active detection mechanism;
[0005] Collection tray: Handles are arranged on both the left and right sides thereof;
[0006] Active detection mechanism: It includes a lead screw, a guide post and a slider. The lead screw is rotatably connected to the middle inside the collection tray. The guide posts are all arranged between the left and right inner walls of the collection tray. The slider is threadedly connected to the middle outer surface of the lead screw through a middle threaded hole. Sliding holes are opened on both the front and rear sides inside the slider. The middle parts of the guide posts on the same side are slidably connected to the inner walls of the sliding holes, providing a basis for active detection. It can actively detect the liquid leakage of the cold box. By driving the water leakage induction wire to move back and forth, it can actively detect the liquid leakage situation, can detect the cold box liquid leakage situation in time and give an early warning, improves the detection efficiency of cold box liquid leakage, and reduces the occurrence of potential safety hazards.
[0007] Further, the active detection mechanism further includes a detection component, which includes a chute, a sliding column, a detection frame, a spring and a leakage induction wire. The chutes are evenly opened in the middle of the bottom end of the slider. The sliding columns are all slidably connected to the inside of the chutes. The lower ends of the four sliding columns are all fixedly connected to a detection frame. Springs are provided between the upper end of the detection frame and the bottom end of the slider. The springs are all sleeved on the outer surface of the sliding columns. The leakage induction wires are all arranged at the lower end inside the detection frame. The outer surface of the leakage induction wire is cooperatively installed with the bottom wall of the collection tray. The leakage induction wire is bidirectionally electrically connected to the single-chip microcomputer, and the liquid leakage condition can be quickly detected.
[0008] Further, the active detection mechanism further includes an installation groove and a limiting wheel. The installation grooves are respectively opened at the left and right ends inside the slider. The limiting wheels are all rotatably connected to the inside of the installation grooves. The outer edges of the limiting wheels are cooperatively installed with the bottom wall of the collection tray. The limiting wheel and the leakage induction wire are both axially adjacent. The diameter of the limiting wheel is larger than that of the leakage induction wire, providing a limiting effect for the leakage induction wire and preventing the leakage induction wire from being worn.
[0009] Further, the active detection mechanism further includes a motor. The motor is arranged in the middle of the right side of the collection tray. The input end of the motor is electrically connected to the output end of the single-chip microcomputer. The left end of the output shaft of the motor is fixedly connected to the right end of the lead screw, providing stable drive for the active detection work.
[0010] Further, it further includes a temperature sensor. The temperature sensors are evenly arranged on the upper end of the slider. The temperature sensor is bidirectionally electrically connected to the single-chip microcomputer, and can detect the temperature at different positions, improving the detection efficiency.
[0011] Further, it further includes adjusting feet, which are respectively arranged at the front and rear ends of the collection tray, facilitating the adjustment of the height of the collection tray and being applicable to cold boxes of different sizes.
[0012] Further, it further includes a single-chip microcomputer and a signal transceiver. The single-chip microcomputer is arranged at the rear side of the right end of the collection tray, and the signal transceiver is arranged at the front side of the right end of the collection tray. The input end of the single-chip microcomputer is electrically connected to an external power supply. The single-chip microcomputer is bidirectionally electrically connected to the signal transceiver, providing a control effect for the detection work and being able to issue an early warning in a timely manner.
[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: The liquid leakage detection device of this cold box has the following advantages:
[0014] The single chip microcomputer controls the motor to rotate forward, and the output shaft of the motor drives the screw rod to rotate forward. As the screw rod rotates, the slider moves to the left along the guide column, driving the detection frame and the water leakage sensing line to move left synchronously. At this time, the limit wheel continues to rotate to the left along the bottom wall of the collecting tray as the detection frame moves left, providing a limiting effect for the water leakage sensing line, so that the water leakage sensing line is always located above the bottom wall of the collecting tray without touching the bottom wall of the collecting tray, which can effectively detect liquid leakage without wearing the water leakage sensing line. At the same time, the spring always presses the detection frame through its own elastic deformation, so that the limit wheel is always close to the bottom wall of the collecting tray, effectively preventing missed detection. When the slider moves to the left end of the collecting tray, the single chip microcomputer controls the motor to reverse, and the output shaft of the motor drives the screw rod to reverse, driving the slider and the water leakage sensing line to move right, and so on. At the same time, as the slider moves, the single chip microcomputer also synchronously controls the temperature sensor to work. The sensor will record the temperature along the way. When the temperature is abnormal, the temperature sensor sends an electrical signal to the single-chip microcomputer, and the single-chip microcomputer sends the abnormal data to the external monitoring room through the signal transceiver. The staff in the monitoring room analyzes the abnormal data and sends people for maintenance when there are hidden dangers. When there are no hidden dangers, the signal transceiver sends an electrical signal to the single-chip microcomputer for contact warning. When the cold box leaks, liquid drips on the bottom wall of the collection tray. When the leakage sensing line passes through the leakage point, the leakage sensing line contacts the leakage, and the leakage sensing line is short-circuited and energized. When the single-chip microcomputer detects the electrical signal, it quickly sends the alarm signal to the external monitoring room through the signal transceiver. The staff in the monitoring room sends personnel for maintenance, and can actively detect cold box leakage by driving the leakage sensing line to move back and forth. It can detect cold box leakage in time and issue a warning, which improves the detection efficiency of cold box leakage and reduces the occurrence of safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the structure of the utility model;
[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the active detection mechanism of the utility model.
[0017] In the figure: 1 collecting tray, 2 handle, 3 adjusting foot, 4 active detection mechanism, 41 screw rod, 42 guide column, 43 slider, 44 detection component, 441 slide groove, 442 slide column, 443 detection frame, 444 spring, 445 water leakage sensing line, 45 installation groove, 46 limit wheel, 47 motor, 5 single chip microcomputer, 6 signal transceiver, 7 temperature sensor. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0019] Please refer to Figure 1-2 , this embodiment provides a technical solution: a cold box liquid leakage detection device, including a collection tray 1 and an active detection mechanism 4;
[0020] Collection tray 1: Handles 2 are provided on both the left and right sides thereof for facilitating the movement of the collection tray 1. It also includes a single-chip microcomputer 5 and a signal transceiver 6. The single-chip microcomputer 5 is arranged at the rear side of the right end of the collection tray 1, and the signal transceiver 6 is arranged at the front side of the right end of the collection tray 1. The input end of the single-chip microcomputer 5 is electrically connected to an external power supply, and the single-chip microcomputer 5 is bidirectionally electrically connected to the signal transceiver 6, providing a control effect for the detection work and being able to issue an early warning in a timely manner. It also includes adjusting feet 3 which are respectively arranged at the front and rear ends of the collection tray 1 for facilitating the adjustment of the height of the collection tray 1 to be applicable to cold boxes of different sizes;
[0021] Active detection mechanism 4: It includes a lead screw 41, guide columns 42 and a slider 43. The lead screw 41 is rotatably connected to the middle inside of the collection tray 1. The guide columns 42 are arranged between the left and right inner walls of the collection tray 1. The slider 43 is threadedly connected to the middle outer surface of the lead screw 41 through a middle threaded hole. Sliding holes are provided on the front and rear sides inside the slider 43. The middle parts of the guide columns 42 on the same side are slidably connected to the inner walls of the sliding holes, providing a basis for active detection. The active detection mechanism 4 further includes a detection component 44. The detection component 44 includes a chute 441, a sliding column 442, a detection frame 443, a spring 444 and a water leakage induction wire 445. The chutes 441 are evenly opened in the middle of the bottom end of the slider 43. The sliding columns 442 are all slidably connected to the inside of the chutes 441. The lower ends of the four sliding columns 442 are all fixedly connected to a detection frame 443. Springs 444 are provided between the upper end of the detection frame 443 and the bottom end of the slider 43. The springs 444 are all sleeved on the outer surfaces of the sliding columns 442. The water leakage induction wires 445 are all arranged at the lower end inside the detection frame 443. The outer surface of the water leakage induction wire 445 is fitted and installed with the bottom wall of the collection tray 1. The water leakage induction wire 445 is bidirectionally electrically connected to the single-chip microcomputer 5, which can quickly detect the liquid leakage situation. The active detection mechanism 4 further includes an installation groove 45 and a limit wheel 46. The installation grooves 45 are respectively opened at the left and right ends inside the slider 43. The limit wheels 46 are all rotatably connected to the inside of the installation grooves 45. The outer edges of the limit wheels 46 are fitted and installed with the bottom wall of the collection tray 1. The limit wheels 46 and the water leakage induction wire 445 are both axially adjacent. The diameter of the limit wheel 46 is larger than the diameter of the water leakage induction wire 445, providing a limiting effect for the water leakage induction wire 445 to prevent the water leakage induction wire 445 from being worn. The active detection mechanism 4 further includes a motor 47. The motor 47 is arranged in the middle on the right side of the collection tray 1. The input end of the motor 47 is electrically connected to the output end of the single-chip microcomputer 5. The left end of the output shaft of the motor 47 is fixedly connected to the right end of the lead screw 41, providing stable drive for the active detection work. It also includes a temperature sensor 7. The temperature sensors 7 are evenly arranged on the upper end of the slider 43. The temperature sensors 7 are bidirectionally electrically connected to the single-chip microcomputer 5, which can detect the temperature at different positions, improving the detection efficiency. It can actively detect the liquid leakage of the cold box. By driving the water leakage induction wire to move back and forth to actively detect the liquid leakage situation, it can timely detect the liquid leakage situation of the cold box and issue a warning, improving the detection efficiency of the liquid leakage of the cold box and reducing the occurrence of potential safety hazards.
[0022] The working principle of the cold box leakage detection device provided by the utility model is as follows: when the cold box leakage detection device is working, the body is placed under the cold box, and the height of the collection plate 1 is adjusted by rotating the nut to adjust the adjustment foot 3, and then the cold box detection work is started. The single-chip microcomputer 5 controls the motor 47 to rotate forward, and the output shaft of the motor 47 drives the screw rod 41 to rotate forward. As the screw rod 41 rotates, the slider 43 moves to the left along the guide column 42, driving the detection frame 443 and the leakage sensing line 445 to move to the left synchronously. At this time, the limit wheel 46 keeps sticking to the left movement of the detection frame 443. The bottom wall of the collecting tray 1 rotates to the left, providing a limiting effect for the water leakage sensing line 445, so that the water leakage sensing line 445 is always located above the bottom wall of the collecting tray 1 without touching the bottom wall of the collecting tray 1, which can effectively detect the leakage without wearing the water leakage sensing line 445. At the same time, the spring 444 always presses the detection frame 443 through its own elastic deformation, so that the limiting wheel 46 is always close to the bottom wall of the collecting tray 1, effectively preventing the occurrence of missed detection. When the slider 43 moves to the left end of the collecting tray 1, the single chip microcomputer 5 controls the motor 47 to reverse, and the output shaft of the motor 47 drives The screw rod 41 reverses, driving the slider 43 and the water leakage sensing line 445 to move right, and so on. At the same time, as the slider 43 moves, the single-chip microcomputer 5 also synchronously controls the temperature sensor 7 to work. The temperature sensor 7 will record the temperature along the way. When the temperature is abnormal, the temperature sensor 7 sends an electrical signal to the single-chip microcomputer 5, and the single-chip microcomputer 5 sends the abnormal data to the external monitoring room through the signal transceiver 6. The staff of the monitoring room analyzes the abnormal data and sends people to repair when there is a hidden danger. When there is no hidden danger, the signal transceiver 6 sends an electrical signal to the single-chip microcomputer 5 to contact the warning. When the cold box leaks, , liquid drips on the bottom wall of the collection tray 1. When the water leakage sensing line 445 passes through the leakage, the water leakage sensing line 445 contacts the leakage, and the water leakage sensing line 445 is short-circuited and energized. When the single-chip microcomputer 5 detects the electrical signal, it quickly sends the alarm signal to the external monitoring room through the signal transceiver 6. The staff of the monitoring room sends personnel to inspect and repair, and can actively detect the leakage of the cold box. By driving the water leakage sensing line to move back and forth to actively discover the leakage, the cold box leakage can be detected in time and an early warning can be issued, which improves the detection efficiency of the cold box leakage and reduces the occurrence of safety hazards.
[0023] It is worth noting that the single chip microcomputer 3 disclosed in the above embodiment is an S7-200 single chip microcomputer, the water leakage sensing line 445 is an RT-LSX-2L water leakage sensing line, the motor 47 is a WS-4058GW-31ZY motor, the signal transceiver 6 is a DMX512 signal transceiver, and the temperature sensor 7 is a TMP100NA / 3K temperature sensor. The single chip microcomputer 3 controls the water leakage sensing line 445, the motor 47, the signal transceiver 6 and the temperature sensor 7 using methods commonly used in the prior art.
[0024] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present utility model.
Claims
1. Cold box leakage detection equipment, characterized by: It comprises a collection plate (1) and an active detection mechanism (4); The collecting tray (1) is provided with handles (2) on both sides thereof; The active detection mechanism (4) comprises a screw rod (41), a guide column (42) and a slider (43), wherein the screw rod (41) is rotatably connected to the middle of the interior of the collection tray (1), the guide column (42) is arranged between the left and right inner walls of the collection tray (1), the slider (43) is threadedly connected to the middle of the outer surface of the screw rod (41) through a middle threaded hole, and sliding holes are provided on both the front and rear sides of the interior of the slider (43), and the middle of the guide column (42) on the same side is slidably connected to the inner wall of the sliding hole; It also includes a single-chip microcomputer (5) and a signal transceiver (6), wherein the single-chip microcomputer (5) is arranged at the rear side of the right end of the collection tray (1), and the signal transceiver (6) is arranged at the front side of the right end of the collection tray (1), an input end of the single-chip microcomputer (5) is electrically connected to an external power supply, and the single-chip microcomputer (5) and the signal transceiver (6) are bidirectionally electrically connected; The active detection mechanism (4) further comprises a detection assembly (44), wherein the detection assembly (44) comprises a slide groove (441), a slide column (442), a detection frame (443), a spring (444) and a water leakage sensing line (445), wherein the slide groove (441) is evenly arranged at the middle of the bottom end of the slider (43), the slide columns (442) are all slidably connected to the inside of the slide groove (441), the lower ends of the four slide columns (442) are all fixedly connected to a detection frame (443), a spring (444) is arranged between the upper end of the detection frame (443) and the bottom end of the slider (43), the spring (444) is all sleeved on the outer surface of the slide column (442), the water leakage sensing line (445) is all arranged at the lower end of the inside of the detection frame (443), the outer surface of the water leakage sensing line (445) is mounted in cooperation with the bottom wall of the collection plate (1), and the water leakage sensing line (445) is bidirectionally electrically connected to the single-chip computer (5).
2. The cold box liquid leakage detection device according to claim 1, characterized in that: The active detection mechanism (4) further comprises a mounting groove (45) and a limiting wheel (46); the mounting groove (45) is respectively provided at the left and right ends of the interior of the slider (43); the limiting wheel (46) is rotatably connected to the interior of the mounting groove (45); the outer edge of the limiting wheel (46) is mounted in cooperation with the bottom wall of the collecting plate (1); the limiting wheel (46) and the water leakage sensing line (445) are both axially adjacent; and the diameter of the limiting wheel (46) is greater than the diameter of the water leakage sensing line (445).
3. The cold box liquid leakage detection device according to claim 2, characterized in that: The active detection mechanism (4) further comprises a motor (47), which is arranged in the middle of the right side of the collection plate (1), the input end of the motor (47) is electrically connected to the output end of the single-chip computer (5), and the left end of the output shaft of the motor (47) is fixedly connected to the right end of the screw rod (41).
4. The cold box liquid leakage detection device according to claim 3 is characterized in that: It also includes a temperature sensor (7), which is evenly arranged on the upper end of the slider (43), and the temperature sensor (7) is bidirectionally electrically connected to the single-chip computer (5).
5. The cold box leakage detection device according to claim 1, characterized in that: It also comprises adjusting feet (3), and the adjusting feet (3) are respectively arranged at the front and rear ends of the collecting tray (1).