A chemical safety sampling device

Abstract

This utility model discloses a chemical safety sampling device, including a sampling tube installed on the side of a tank and a protective box covering the sampling tube. A solenoid valve is installed on the sampling tube, and the protective box has a door. One side of the door is hinged to the protective box, and the other side of the door is connected to the protective box via an electromagnetic lock. A start switch is installed on the surface of the protective box. The start switch, electromagnetic lock, and solenoid valve are all connected to a PLC controller. This utility model, by setting a protective box outside the sampling tube and placing the sampling container inside the protective box for sampling, can effectively avoid safety accidents caused by splashing chemical cleaning solutions.

Description

Technical Field

[0001] This utility model belongs to the field of chemical sampling technology, specifically relating to a chemical safety sampling device. Background Technology

[0002] During the production process of IC substrates, special board cleaning equipment is required to clean the board surface to remove foreign matter. The cleaning liquid is a chemical liquid (such as sulfuric acid, hydrogen peroxide, etc.) prepared in a certain proportion. Therefore, it is necessary to take samples regularly during the production process to test the concentration value. A special sampling port must be used for sampling during the testing and sampling process.

[0003] The existing sampling port is designed to connect directly to the sampling pipe from the tank, with a manual valve for sampling control. Because the chemical outlet at the sampling port is exposed without any external protection, manual sampling operations are prone to chemical splashing, posing a safety hazard. Furthermore, the chemical output switch is a manual valve without any protective measures, which may lead to chemical leaks due to personnel negligence in forgetting to close the valve during sampling. Utility Model Content

[0004] The purpose of this invention is to provide a chemical safety sampling device to solve the problems mentioned in the background art. The chemical safety sampling device provided by this invention features high sampling safety.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a chemical safety sampling device, comprising a sampling tube installed on the side of a tank and a protective box covering the outside of the sampling tube, a solenoid valve installed on the sampling tube, a door on the protective box, one side of the door being hinged to the protective box, and the other side of the door being connected to the protective box via an electromagnetic lock, a start switch being installed on the surface of the protective box, and the start switch, the electromagnetic lock, and the solenoid valve being signal-connected to a PLC controller.

[0006] To further facilitate the collection of waste liquid, the bottom of the protective box is provided with a concave arc-shaped cavity, and the bottom of the protective box is connected to a drain pipe that communicates with the concave arc-shaped cavity. A support platform is installed on the concave arc-shaped cavity.

[0007] To prevent sampling from starting without placing a sampling container, a placement platform is provided above the support platform, and a pressure sensor is installed between the placement platform and the support platform. The pressure sensor is connected to the PLC controller signal.

[0008] To accurately control the sampling volume, a flow meter is further installed on the sampling tube above the solenoid valve, and the flow meter is connected to the PLC controller.

[0009] To improve safety by closing the sampling tube in case of an emergency, a manual valve is further installed on the inlet end of the sampling tube.

[0010] To prevent sampling from starting before the enclosure door is closed, a door pressure switch corresponding to the door edge is installed on the protective enclosure, and the door pressure switch is connected to the PLC controller signal.

[0011] To facilitate intuitive understanding of whether sampling is complete, indicator lights are installed on the surface of the protective box, and these indicator lights are connected to the PLC controller signals.

[0012] In order to issue an alarm to alert staff in case of malfunction, a buzzer is installed on the surface of the protective box, and the buzzer is connected to the PLC controller signal.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model has a protective box on the outside of the sampling tube. The sampling container is placed inside the protective box for sampling, which can effectively avoid safety accidents caused by splashing chemical cleaning solution.

[0015] 2. The solenoid valve and solenoid lock of this utility model are linked with the start switch. After the start switch is pressed, the solenoid lock locks the box door and then the solenoid valve opens to start sampling. When the set time is reached, the solenoid valve closes to stop sampling and the solenoid lock opens, thus preventing the staff from opening the box door during the sampling process and causing a safety accident.

[0016] 3. The bottom of the protective box of this utility model is provided with a concave arc-shaped cavity, and the bottom of the protective box is connected to a drain pipe that communicates with the concave arc-shaped cavity, which can discharge the chemical cleaning liquid crystal drain pipe spilled during the sampling process, thereby realizing the collection of waste liquid.

[0017] 4. A pressure sensor is installed between the placement platform and the support platform of this utility model, which can detect whether a sampling container is placed on the placement platform, thus avoiding sampling without placing a sampling container.

[0018] 5. A flow meter is installed on the sampling tube above the solenoid valve of this utility model to facilitate precise control of the sampling amount.

[0019] 6. The protective box of this utility model is equipped with a door pressure switch corresponding to the door edge, which can detect whether the door is closed and prevent sampling from starting when the door is not closed.

[0020] 7. A buzzer is installed on the surface of the protective box of this utility model. When improper operation occurs, the buzzer will sound an alarm to remind the staff. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the structure of the protective box of this utility model.

[0023] In the diagram: 1. Tank; 2. Manual valve; 3. Sampling tube; 4. Flow meter; 5. Solenoid valve; 6. Protective box; 7. Box door; 8. Placement platform; 9. Support platform; 10. Drain pipe; 11. Electromagnetic lock; 12. Buzzer; 13. Indicator light; 14. Start switch; 15. Door pressure switch. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] Please see Figures 1-2 The present invention provides the following technical solution: a chemical safety sampling device, including a sampling tube 3 installed on the side of a tank 1 and a protective box 6 covering the outside of the sampling tube 3. A solenoid valve 5 is installed on the sampling tube 3, and a door 7 is provided on the protective box 6. Both the protective box 6 and the door 7 are made of FEP material (fluorinated ethylene propylene copolymer). One side of the door 7 is hinged to the protective box 6, and the other side of the door 7 is connected to the protective box 6 through an electromagnetic lock 11. A start switch 14 is installed on the surface of the protective box 6. The start switch 14, the electromagnetic lock 11, and the solenoid valve 5 are all connected to the PLC controller signal.

[0027] By adopting the above technical solution, this utility model provides a protective box 6 outside the sampling tube 3. Placing the sampling container inside the protective box 6 for sampling effectively avoids safety accidents caused by splashing chemical cleaning fluid. The solenoid valve 5 and solenoid lock 11 are linked to the start switch 14. After pressing the start switch 14, the solenoid lock 11 locks the box door 7, and then the solenoid valve 5 opens to begin sampling. When the set time is reached, the solenoid valve 5 closes, stopping sampling, and the solenoid lock 11 opens, preventing personnel from opening the box door 7 during sampling and causing a safety accident.

[0028] Example 2

[0029] The difference between this embodiment and embodiment 1 is that: specifically, the bottom of the protective box 6 is provided with a concave arc-shaped cavity, the bottom of the protective box 6 is connected to a drain pipe 10 that communicates with the concave arc-shaped cavity, a collection tank is provided below the drain pipe 10, and a support platform 9 is installed on the concave arc-shaped cavity for placing the sampling container.

[0030] By adopting the above technical solution, the chemical cleaning liquid crystal drain pipe 10 spilled during the sampling process is discharged, thereby achieving the collection of waste liquid.

[0031] Example 3

[0032] The difference between this embodiment and embodiment 1 is that: specifically, a placement platform 8 is provided above the support platform 9, and a pressure sensor is installed between the placement platform 8 and the support platform 9. The pressure sensor is connected to the PLC controller signal.

[0033] By adopting the above technical solution, a pressure sensor detects whether a sampling container is placed on the placement platform 8. If no sampling container is detected, the solenoid valve 5 will not open.

[0034] Example 4

[0035] The difference between this embodiment and embodiment 1 is that, specifically, a flow meter 4 is installed on the sampling tube 3 above the solenoid valve 5, and the flow meter 4 is connected to the PLC controller signal.

[0036] By adopting the above technical solution, the sampling flow rate is monitored by the flow meter 4, which facilitates accurate control of the sampling amount.

[0037] Example 5

[0038] The difference between this embodiment and embodiment 1 is that, specifically, a manual valve 2 is installed on the inlet end of the sampling tube 3.

[0039] By adopting the above technical solution, in an emergency, the sampling tube 3 can be closed by manual valve 2, thereby improving safety.

[0040] Example 6

[0041] The difference between this embodiment and embodiment 1 is that, specifically, the protective box 6 is equipped with a door pressure switch 15 corresponding to the door side of the box door 7, and the door pressure switch 15 is connected to the PLC controller signal.

[0042] By adopting the above technical solution, the door pressure switch 15 determines whether the box door 7 is closed. If the box door 7 is not closed, the solenoid valve 5 will not open.

[0043] Example 7

[0044] The difference between this embodiment and embodiment 1 is that, specifically, an indicator light 13 is installed on the surface of the protective box 6. The indicator light 13 is connected to the PLC controller signal. There are two indicator lights 13, one red and one green. When sampling is in progress, the red indicator light is on, and when sampling is completed, the green indicator light is on.

[0045] By adopting the above technical solution, it is easy to intuitively know whether the sampling has been completed.

[0046] Example 8

[0047] The difference between this embodiment and embodiment 1 is that, specifically, a buzzer 12 is installed on the surface of the protective box 6, and the buzzer 12 is connected to the PLC controller signal.

[0048] By adopting the above technical solution, when an operation is improper, such as when the start switch 14 is pressed and there is no sampling container or the door 7 is not closed, the buzzer 12 will sound an alarm to remind the staff.

[0049] The operating steps of this utility model are as follows:

[0050] 1. Staff members place the sampling container on the placement table 8;

[0051] 2. After closing the door 7, press the start switch 14;

[0052] 3. The PLC controller determines whether a sampling container is placed and whether the box door 7 is closed;

[0053] 4. If a sampling container is not placed or the door 7 is not closed, an alarm will be sounded by buzzer 12, and staff will be called to check.

[0054] 5. If there are no abnormalities, open the electromagnetic lock 11, then open the electromagnetic valve 5 and turn on the red indicator light;

[0055] 6. When the flow meter 4 detects that the set flow rate has been reached, it closes the solenoid valve 5 and the solenoid lock 11, and illuminates the green indicator light.

[0056] 7. Staff will remove the sampling container after the sampling is completed.

[0057] In summary, this invention features a protective box 6 outside the sampling tube 3. Placing the sampling container inside the protective box 6 for sampling effectively prevents safety accidents caused by splashing chemical cleaning fluid. The solenoid valve 5 and solenoid lock 11 are linked to the start switch 14. After pressing the start switch 14, the solenoid lock 11 locks the box door 7, and then the solenoid valve 5 opens to begin sampling. After a set time, the solenoid valve 5 closes, stopping sampling, and the solenoid lock 11 opens, preventing personnel from opening the box door 7 during sampling and causing a safety accident. The bottom of the protective box 6 has a concave arc-shaped cavity, and a drain pipe 10 connected to this cavity is connected to the bottom of the protective box 6. This drain pipe 10 can discharge any spilled chemical cleaning fluid during sampling, achieving waste liquid collection. A pressure sensor is installed between the placement platform 8 and the support platform 9 to detect whether a sampling container is placed on the placement platform 8, preventing sampling from starting without a sample container. A flow meter 4 is installed on the sampling tube 3 above the solenoid valve 5 for precise control of the sampling volume. A door pressure switch 15 is installed on the protective box 6 corresponding to the door 7, which can detect whether the door 7 is closed, preventing sampling from starting with the door 7 open. A buzzer 12 is installed on the surface of the protective box 6; in case of improper operation, the buzzer 12 will sound an alarm to remind the staff.

[0058] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A chemical safety sampling device characterized by: It includes a sampling tube installed on the side of the tank and a protective box covering the outside of the sampling tube. A solenoid valve is installed on the sampling tube, and a door is provided on the protective box. One side of the door is hinged to the protective box, and the other side of the door is connected to the protective box through an electromagnetic lock. A start switch is installed on the surface of the protective box. The start switch, electromagnetic lock, and solenoid valve are all connected to the PLC controller signal.

2. A chemical safety sampling device according to claim 1, characterised in that: The bottom of the protective box is provided with a concave arc-shaped cavity, and the bottom of the protective box is connected to a drain pipe that communicates with the concave arc-shaped cavity. A support platform is installed on the concave arc-shaped cavity.

3. A chemical safety sampling device according to claim 2, wherein: A placement platform is provided above the support platform, and a pressure sensor is installed between the placement platform and the support platform. The pressure sensor is connected to the PLC controller signal.

4. A chemical safety sampling device according to claim 1, wherein: A flow meter is installed on the sampling tube above the solenoid valve, and the flow meter is connected to the PLC controller.

5. A chemical safety sampling device according to claim 1, wherein: The sampling tube is equipped with a manual valve at the inlet end.

6. A chemical safety sampling device according to claim 1, wherein: The protective box is equipped with a door pressure switch corresponding to the door edge, and the door pressure switch is connected to the PLC controller signal.

7. A chemical safety sampling device according to claim 1, characterized in that: Indicator lights are installed on the surface of the protective box, and the indicator lights are connected to the PLC controller signals.

8. A chemical safety sampling device according to claim 1, wherein: A buzzer is installed on the surface of the protective box, and the buzzer is connected to the PLC controller.

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