Liquid quantitative loading controller

Abstract

The utility model discloses a liquid quantitative loading controller which comprises a shell and a fixing unit. An explosion-proof display screen is arranged in a rectangular hole in the upper end of the front side face of the shell, a keyboard is arranged at a mounting hole in the lower end of the front side face of the shell, a wire holder plate is movably inserted into the lower end of the shell, and a wire holder is arranged at the upper end of the wire holder plate; the fixing unit is arranged at the lower end of the interior of the shell, and the fixing unit is movably connected with the wire holder in an inserted mode; wherein the single-chip microcomputer is arranged on the rear side wall of the shell, the input end of the anti-explosion display screen is electrically connected with the output end of the single-chip microcomputer, the output end of the keyboard is electrically connected with the input end of the single-chip microcomputer, the wire holder is bidirectionally and electrically connected with the single-chip microcomputer, the input end of the single-chip microcomputer is electrically connected with an external power supply, and the fixing unit comprises a stud, a nut and an L-shaped fixing strip. According to the liquid quantitative loading controller, wiring can be conducted outside, wiring is convenient, installation convenience is good, meanwhile, sealing performance is good, and use safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid loading, in particular to a liquid metering loading controller. Background Art

[0002] In places such as refineries, chemical plants, and small and medium-sized oil depots, loading operations are carried out frequently, which is an indispensable link in production operations. In order to improve the efficiency and safety of loading operations, more and more enterprises are now adopting metering loading systems. Its liquid metering loading controller is the core of the entire system. It can receive flow information in the system and then control the electric valve to achieve metering loading. Automatic control reduces the difficulty and workload of manual operation and reduces human errors. During use, the liquid metering loading controller needs to be connected to external electrical components. During installation, generally, the shell of the liquid metering loading controller needs to be opened, and then the external cable is connected to the internal terminal block for wiring inside. However, the internal space is narrow and the operation is inconvenient, which affects the convenience during the installation of the liquid metering loading controller. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a liquid metering loading controller, which can be wired externally, is convenient for wiring and installation, has good sealing performance, and has high use safety, and can effectively solve the problems in the background art.

[0004] To achieve the above object, the utility model provides the following technical solution: a liquid metering loading controller, including a shell and a fixing unit;

[0005] Shell: An explosion-proof display screen is arranged inside a rectangular hole at the upper end of the front side of the shell, a keyboard is arranged at an installation hole at the lower end of the front side of the shell, a terminal block plate is movably inserted at the lower end of the shell, and a terminal block is arranged at the upper end of the terminal block plate;

[0006] Fixing unit: It is arranged at the lower end inside the shell, and the fixing unit is movably inserted with the terminal block;

[0007] Among them: It further includes a single-chip microcomputer, the single-chip microcomputer is arranged on the rear side wall of the shell, the input end of the explosion-proof display screen is electrically connected to the output end of the single-chip microcomputer, the output end of the keyboard is electrically connected to the input end of the single-chip microcomputer, the terminal block is bidirectionally electrically connected to the single-chip microcomputer, and the input end of the single-chip microcomputer is electrically connected to an external power supply. During on-site construction, the terminal block can be quickly pulled out from the shell, and operations can be carried out outside the shell to realize the connection of cables with electrical components of the liquid metering loading system, greatly improving the convenience of installing the liquid metering loading controller, and having good sealing performance and high use safety by itself.

[0008] Further, the fixing unit includes studs, nuts and L-shaped fixing bars. The studs are respectively rotatably connected to the left and right sides of the lower end inside the housing through sealed bearings. Nuts are threadedly connected to the middle parts of the outer arc surfaces of the studs. L-shaped fixing bars are provided on the outer arc surfaces of the nuts. The lower surfaces of the L-shaped fixing bars are slidably connected to the lower side wall of the housing. The hooks at the lower ends of the L-shaped fixing bars are movably inserted into the wiring seat plate, facilitating the fixing of the wiring seat plate.

[0009] Further, the fixing unit further includes a synchronous shaft. The synchronous shaft is arranged between the two studs. The thread directions of the two studs are opposite, facilitating the synchronous control of the two studs.

[0010] Further, the fixing unit further includes guide posts. The guide posts are respectively arranged at the lower ends of the left and right side walls of the housing. The guide posts are respectively slidably connected to the laterally adjacent L-shaped fixing bars, providing moving guides for the L-shaped fixing bars.

[0011] Further, hexagonal holes are respectively opened at the ends of the studs far from the synchronous shaft, facilitating the control of the rotation of the studs.

[0012] Further, explosion-proof glands are respectively arranged at the wire outlet holes at the lower ends of the wiring seat plate, facilitating the fixing of the cables and the sealing of the wire passing holes.

[0013] Further, a silica gel pad is arranged at the edge of the upper surface of the lower end of the wiring seat plate. The upper surface of the silica gel pad contacts the lower surface of the housing, improving the sealing performance between the wiring seat plate and the housing.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: This liquid quantitative loading controller has the following advantages:

[0015] 1. During on-site construction, insert an internal square wrench into the hexagonal hole to rotate the stud. The stud drives another stud to rotate synchronously through the synchronous shaft. The stud drives the L-shaped fixing bar to move away from the wiring seat plate and separate from it through the nut. Then, the wiring seat plate can be pulled out from below the housing. The wiring seat plate drives the wiring seat to move out of the housing. Then, pass the cables of electrical components such as the overflow static electricity protector, flow monitor, and electric valve in the liquid quantitative loading system through the explosion-proof gland and connect them to the foot positions at the lower end of the wiring seat. During on-site construction, the wiring seat can be quickly pulled out from the housing, and the connection with the cables of the electrical components in the liquid quantitative loading system can be realized by operating outside the housing, greatly improving the convenience of installing the liquid quantitative loading controller.

[0016] 2. After the cable connection is completed, tighten the explosion-proof gland. The elastic element inside the explosion-proof gland squeezes and seals the cable to achieve sealing of the line inlet of the terminal block. Then insert the terminal block into the lower end of the shell, and then rotate the stud in the opposite direction to drive the two L-shaped fixing strips to close to the middle. The lower end of the L-shaped fixing strip will be inserted into the interior of the terminal block, and the upper surface of the lower end of the L-shaped fixing strip is an inclined surface, which will drive the terminal block to move upward. The terminal block drives the silicone pad to move up synchronously and resist the shell, thereby achieving sealing between the terminal block and the shell to prevent flammable gases in the environment from entering the interior of the shell. The outer shell structure is not only easy to disassemble, but also has good sealing, which can effectively prevent flammable gases from entering the interior of the shell, greatly improving safety during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a cross-sectional structural schematic diagram of the fixing unit of the utility model;

[0019] Figure 3 It is a schematic diagram of the enlarged structure of point A of the utility model.

[0020] In the figure: 1 housing, 2 single chip microcomputer, 3 explosion-proof display screen, 4 keyboard, 5 terminal block plate, 6 terminal block, 7 explosion-proof cable gland, 8 fixing unit, 81 stud, 82 nut, 83 L-type fixing strip, 84 synchronous shaft, 85 guide column, 9 silicone pad, 10 hexagonal hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1-3 ,This embodiment provides a technical solution: a liquid quantitative loading controller, including a housing 1 and a fixing unit 8;

[0023] Shell 1: An explosion-proof display screen 3 is provided inside the rectangular hole at the upper end of the front side surface of the shell 1. A keyboard 4 is provided at the installation hole at the lower end of the front side surface of the shell 1. A wiring seat plate 5 is movably inserted at the lower end of the shell 1. By pulling out the wiring seat plate 5 from below the shell 1, a wiring seat 6 is provided at the upper end of the wiring seat plate 5. The wiring seat plate 5 drives the wiring seat 6 to move out from the inside of the shell 1. The cables of electrical components such as the overflow static electricity protector, flow monitor, and electric valve in the liquid quantitative loading system are connected to the foot positions at the lower end of the wiring seat 6. Explosion-proof glands 7 are provided at the wire outlet holes at the lower end of the wiring seat plate 5. By tightening the explosion-proof glands 7, the elastic elements inside the explosion-proof glands 7 squeeze and seal the cables, achieving the sealing of the inlet of the wiring seat plate 5. A silicone pad 9 is provided at the edge of the upper surface of the lower end of the wiring seat plate 5. The upper surface of the silicone pad 9 contacts the lower surface of the shell 1. The wiring seat plate 5 drives the silicone pad 9 to move upward synchronously and abut against the shell 1, thereby achieving the sealing between the wiring seat plate 5 and the shell 1;

[0024] Fixing unit 8: It is arranged at the lower end inside the shell 1. The fixing unit 8 is movably inserted with the wiring seat 6. The fixing unit 8 includes a stud 81, a nut 82, and an L-shaped fixing strip 83. The studs 81 are respectively rotatably connected to the left and right sides of the lower end inside the shell 1 through sealed bearings. Nuts 82 are threadedly connected to the middle of the outer arc surfaces of the studs 81. L-shaped fixing strips 83 are provided on the outer arc surfaces of the nuts 82. The lower surfaces of the L-shaped fixing strips 83 are slidably connected to the lower side walls of the shell 1. The hooks at the lower ends of the L-shaped fixing strips 83 are movably inserted with the wiring seat plate 5. The studs 81 drive the L-shaped fixing strips 83 to move away from the wiring seat plate 5 and separate from it through the nuts 82. The upper surface of the lower end of the L-shaped fixing strip 83 is an inclined surface, which will drive the wiring seat plate 5 to move upward. The fixing unit 8 further includes a synchronous shaft 84, which is arranged between the two studs 81. The thread directions of the two studs 81 are opposite. The stud 81 drives the other stud 81 to rotate synchronously through the synchronous shaft 84. The fixing unit 8 further includes guide posts 85, which are respectively arranged at the lower ends of the left and right side walls of the shell 1. The guide posts 85 are respectively slidably connected to the laterally adjacent L-shaped fixing strips 83. The guide posts 85 provide moving guidance for the L-shaped fixing strips 83. Hexagonal holes 10 are opened at the ends of the studs 81 far from the synchronous shaft 84. Insert an internal cubic wrench into the hexagonal holes 10 to rotate the studs 81;

[0025] Among them: It also includes a single-chip microcomputer 2, which is arranged on the rear side wall of the housing 1. The input end of the explosion-proof display screen 3 is electrically connected to the output end of the single-chip microcomputer 2, the output end of the keyboard 4 is electrically connected to the input end of the single-chip microcomputer 2, the wiring seat 6 is bidirectionally electrically connected to the single-chip microcomputer 2, the input end of the single-chip microcomputer 2 is electrically connected to an external power supply, and the pins at the upper end of the wiring seat 6 are electrically connected to the single-chip microcomputer 2 through pre-installed wires. Furthermore, the output ends of the overflow static electricity protector and the flow monitor are electrically connected to the input end of the single-chip microcomputer 2 through the wiring seat 6, and the input end of the electric valve is electrically connected to the output end of the single-chip microcomputer 2 through the wiring seat 6. The operation keyboard 4 sends loading information to the single-chip microcomputer 2, and the single-chip microcomputer 2 displays the loading information through the explosion-proof display screen 3. The flow monitor monitors the flow rate in the liquid supply pipeline and converts it into an electrical signal and transmits it to the single-chip microcomputer 2. The single-chip microcomputer 2 calculates the flow information and displays the loading information through the explosion-proof display screen 3. When the preset value is reached, the single-chip microcomputer 2 controls the electric valve to close to cut off the liquid supply pipeline to achieve quantitative loading of the liquid. At the same time, the overflow static electricity protector monitors the grounding state of the tanker and the liquid situation in the tank. When there is an overflow or ungrounded hidden danger, it will send an electrical signal to the single-chip microcomputer 2 to control the electric valve to close to ensure the safety of loading.

[0026] The working principle of the liquid metering loading controller provided by the utility model is as follows: During on-site construction, insert the inner cubic wrench into the hexagonal hole 10 to rotate the stud 81. The stud 81 drives another stud 81 to rotate synchronously through the synchronous shaft 84. The stud 81 drives the L-shaped fixing strip 83 to move away from the wiring seat plate 5 through the nut 82 and separate from it. Then, the wiring seat plate 5 can be pulled out from the lower part of the housing 1. The wiring seat plate 5 drives the wiring seat 6 to move out from the inside of the housing 1. Then, pass the cables of electrical components such as the overflow static electricity protector, flow monitor, and electric valve in the liquid metering loading system through the explosion-proof gland 7 and connect them to the foot positions at the lower end of the wiring seat 6. The foot positions at the upper end of the wiring seat 6 are electrically connected to the single-chip microcomputer 2 through pre-installed wires. Furthermore, the output ends of the overflow static electricity protector and the flow monitor are electrically connected to the input end of the single-chip microcomputer 2 through the wiring seat 6, and the input end of the electric valve is electrically connected to the output end of the single-chip microcomputer 2 through the wiring seat 6. After the cable connection is completed, tighten the explosion-proof gland 7. The elastic element inside the explosion-proof gland 7 squeezes and seals the cable, realizing the sealing of the cable inlet of the wiring seat plate 5. Then, insert the wiring seat plate 5 into the lower end of the housing 1, and then rotate the stud 81 in the reverse direction to drive the two L-shaped fixing strips 83 to close towards the middle. The lower ends of the L-shaped fixing strips 83 will insert into the inside of the wiring seat plate 5, and the upper surface of the lower end of the L-shaped fixing strip 83 is an inclined surface, which will drive the wiring seat plate 5 to move upward. The wiring seat plate 5 drives the silica gel pad 9 to move upward synchronously and abut against the housing 1, thereby realizing the sealing between the wiring seat plate 5 and the housing 1 and preventing combustible gas in the environment from entering the inside of the housing 1. When in use, the operation keyboard 4 sends loading information to the single-chip microcomputer 2. The single-chip microcomputer 2 displays the loading information through the explosion-proof display screen 3. The flow monitor monitors the flow rate in the liquid supply pipeline and converts it into an electrical signal and transmits it to the single-chip microcomputer 2. The single-chip microcomputer 2 calculates the flow information and displays the loading information through the explosion-proof display screen 3. When the preset value is reached, the single-chip microcomputer 2 controls the electric valve to close to cut off the liquid supply pipeline to realize the metering loading of the liquid. At the same time, the overflow static electricity protector monitors the grounding state of the tank truck and the liquid situation in the tank. When there is an overflow or ungrounded hidden danger, it will send an electrical signal to the single-chip microcomputer 2 to control the electric valve to close to ensure the safety of loading.

[0027] It should be noted that the single-chip microcomputer 2, keyboard 4, and explosion-proof display screen 3 disclosed in the above embodiments can be freely configured according to the actual application scenario. The single-chip microcomputer 2 can select the single-chip microcomputer of the STM32 series, and the explosion-proof display screen 3 can select the LED industrial explosion-proof screen of the CLEx series. The single-chip microcomputer 2 controls the keyboard 4 and the explosion-proof display screen 3 to work using the methods commonly used in the prior art.

[0028] 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. Liquid quantitative loading controller, characterized by: It comprises a housing (1) and a fixing unit (8); The housing (1) has an explosion-proof display screen (3) disposed inside a rectangular hole at the upper end of the front side surface thereof, a keyboard (4) disposed at the mounting hole at the lower end of the front side surface of the housing (1), a wiring seat plate (5) movably plugged into the lower end of the housing (1), and a wiring seat (6) disposed at the upper end of the wiring seat plate (5); A fixing unit (8): arranged at the lower end of the housing (1), the fixing unit (8) being movably plugged into the wiring seat (6); The invention further comprises a single chip microcomputer (2), wherein the single chip microcomputer (2) is arranged on the rear side wall of the housing (1), the input end of the explosion-proof display screen (3) is electrically connected to the output end of the single chip microcomputer (2), the output end of the keyboard (4) is electrically connected to the input end of the single chip microcomputer (2), the wiring socket (6) is bidirectionally electrically connected to the single chip microcomputer (2), and the input end of the single chip microcomputer (2) is electrically connected to an external power supply.

2. The liquid quantitative loading controller according to claim 1, characterized in that: The fixing unit (8) comprises a stud (81), a nut (82) and an L-shaped fixing strip (83); the stud (81) is rotatably connected to the left and right sides of the lower end of the housing (1) via a sealed bearing; the middle of the outer arc surface of the stud (81) is threadedly connected to the nut (82); the outer arc surface of the nut (82) is provided with an L-shaped fixing strip (83); the lower surface of the L-shaped fixing strip (83) is slidably connected to the lower side wall of the housing (1); and the hook at the lower end of the L-shaped fixing strip (83) is movably plugged into the wiring seat plate (5).

3. The liquid quantitative loading controller according to claim 2, characterized in that: The fixing unit (8) further comprises a synchronization shaft (84), wherein the synchronization shaft (84) is arranged between two studs (81), and the thread directions of the two studs (81) are opposite.

4. The liquid quantitative loading controller according to claim 2, characterized in that: The fixing unit (8) further comprises guide columns (85), which are respectively arranged at the lower ends of the left and right side walls of the housing (1), and the guide columns (85) are respectively slidably connected to the laterally adjacent L-shaped fixing strips (83).

5. The liquid quantitative loading controller according to claim 3, characterized in that: The ends of the studs (81) away from the synchronization shaft (84) are each provided with a hexagonal hole (10).

6. The liquid quantitative loading controller according to claim 1, characterized in that: The outlet holes at the lower end of the wiring seat plate (5) are all provided with explosion-proof cable glands (7).

7. The liquid quantitative loading controller according to claim 1, characterized in that: A silicone pad (9) is provided at the edge of the upper surface of the lower end of the wiring seat plate (5), and the upper surface of the silicone pad (9) is in contact with the lower surface of the housing (1).

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