Hydrofluoric acid filling apparatus

Abstract

This utility model discloses a hydrofluoric acid filling device, including a conveyor table and a filling chamber. Beneficial effects: This utility model features a movable and liftable sealing plate. The hydrofluoric acid container is conveyed into the filling chamber by the conveyor table and moved above the filling head of the filling mechanism. Subsequently, the filling mechanism moves the filling head down and inserts it into the hydrofluoric acid container for filling. After filling, a servo motor drives a lead screw to rotate forward, causing a moving seat threaded with the lead screw to quickly move above the hydrofluoric acid container. The sealing plate aligns with the top opening of the hydrofluoric acid container. Then, an electric cylinder retracts, pulling the track and sealing plate down to seal the top opening of the hydrofluoric acid container. This device uses a liftable and movable sealing plate, which can temporarily seal the top opening of the filled hydrofluoric acid container during movement, reducing hydrofluoric acid evaporation and leakage during movement, minimizing environmental damage and waste.

Description

Technical Field

[0001] This utility model relates to the field of hydrofluoric acid filling technology, and more specifically, to a hydrofluoric acid filling device. Background Technology

[0002] Given the volatile and fuming nature of hydrofluoric acid, filling is typically carried out in a sealed chamber. This chamber mainly consists of a filling mechanism and a capping mechanism. The filling mechanism uses a liftable filling head and a filling pump to fill the container, while the capping mechanism uses a capping mechanism and a liftable and rotatable capping head to tighten the cap. After filling, the hydrofluoric acid container needs to be transported to the capping mechanism for cap installation and tightening. During this transport process, the hydrofluoric acid container cannot be completely sealed, leading to the evaporation of some hydrofluoric acid. This causes the concentration of hydrofluoric acid in the sealed space to gradually increase, posing a risk of leakage later on. This is not stable or safe, and it also results in the waste of some hydrofluoric acid. Further improvements are needed. Utility Model Content

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a hydrofluoric acid filling device that has the advantages of reducing leakage and improving work efficiency, thereby solving the problems mentioned in the background technology.

[0004] (II) Technical Solution To achieve the aforementioned advantages of reducing leakage and improving work efficiency, the specific technical solution adopted by this utility model is as follows: A hydrofluoric acid filling equipment includes a conveyor table and a filling chamber. The filling chamber is fixedly installed on the top surface of the conveyor table, and a filling mechanism and a capping mechanism are installed inside the filling chamber. An installation plate is fixedly installed below the filling mechanism and the capping mechanism on the inner wall of the filling chamber. An electric cylinder is fixedly installed on the bottom surface of the installation plate, and a track is fixedly installed on the top surface of the moving rod of the electric cylinder. A lead screw is rotatably connected inside the track. A moving seat is slidably connected inside the track, and a sealing plate is fixedly connected below the moving seat through a connecting rod. The lead screw passes through the moving seat and is threadedly engaged with the moving seat. A servo motor is fixedly connected to one end of the track, and the output end of the servo motor is fixedly connected to one end of the lead screw.

[0005] Furthermore, the filling chamber is equipped with air extraction ports located above the filling head of the filling mechanism and the capping head of the capping mechanism, respectively, and the other end of the air extraction port is connected to an air extraction device and a hydrofluoric acid waste gas treatment device.

[0006] Furthermore, the filling chamber has a hinged door on its front facade, and the door is a sealed glass door.

[0007] Furthermore, a guide rod is fixedly installed on the bottom surface of the track, and the guide rod passes through the mounting plate and is slidably connected to the mounting plate.

[0008] Furthermore, the lead screw passes through the track and is rotatably connected to the track via bearings.

[0009] Furthermore, the filling chamber has inlets and outlets on both sides for hydrofluoric acid containers to pass through, and electric lifting doors are installed on the outside of the inlets and outlets.

[0010] Furthermore, the spacing between the sealing plates is equal to the spacing between the filling heads of the filling mechanism, and a sealing gasket is fixedly adhered to the bottom surface of the sealing plate.

[0011] (III) Beneficial Effects Compared with the prior art, this utility model provides a hydrofluoric acid filling device, which has the following beneficial effects: (1) This utility model is equipped with a movable and lifting sealing plate. The hydrofluoric acid container enters the filling chamber under the conveyor of the conveyor table and moves to the top of the filling head of the filling mechanism. Then, the filling mechanism drives the filling head to move down and insert it into the hydrofluoric acid container for filling. After filling, the servo motor drives the lead screw to rotate in the forward direction, which drives the moving seat that is threaded with the lead screw to move quickly to the top of the hydrofluoric acid container. The sealing plate is aligned with the top opening of the hydrofluoric acid container. Then, the electric cylinder retracts, pulling the track and the sealing plate down to close the top opening of the hydrofluoric acid container. Then, the servo motor drives the lead screw to rotate in the reverse direction, working synchronously with the conveyor table, and driving the sealing plate to rotate in the reverse direction. The device moves along with the hydrofluoric acid container filled with hydrofluoric acid towards the capping mechanism until the capping head of the mechanism aligns with the top opening of the container. Then, the electric cylinder extends, causing the sealing plate to move away from the top opening of the container. The servo motor drives the lead screw to rotate forward and reset, allowing the capping mechanism to perform the capping. This device uses a lifting and movable sealing plate, which can temporarily seal the top opening of the hydrofluoric acid container during movement, reducing hydrofluoric acid evaporation and leakage, minimizing environmental damage, reducing hydrofluoric acid waste, improving filling safety and stability, and increasing work efficiency.

[0012] (2) This utility model is equipped with an air extraction port, which is arranged above the filling head of the filling mechanism and the capping head of the capping mechanism. Air is extracted simultaneously during filling and capping, and the negative pressure is used to remove the volatilized harmful gases, reducing the leakage of harmful gases and further improving the safety of use. The air extraction port is connected to the air extraction equipment and the hydrofluoric acid waste gas treatment equipment through a pipeline to avoid waste gas pollution of the environment. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the internal structure of a hydrofluoric acid filling device according to an embodiment of the present utility model; Figure 2 This is a front view of a hydrofluoric acid filling device according to an embodiment of the present utility model; Figure 3 This is a side view of the track according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the sealing plate according to an embodiment of the present utility model.

[0015] In the picture: 1. Conveyor table; 2. Filling bin; 3. Filling mechanism; 4. Capping mechanism; 5. Air extraction port; 6. Track; 7. Mounting plate; 8. Sealing plate; 9. Electric cylinder; 10. Guide rod; 11. Bin door; 12. Moving seat; 13. Connecting rod; 14. Servo motor; 15. Lead screw; 16. Sealing gasket. Detailed Implementation

[0016] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0017] According to an embodiment of the present invention, a hydrofluoric acid filling device is provided.

[0018] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. Please refer to them. Figure 1 and Figure 3According to an embodiment of this utility model, a hydrofluoric acid filling device includes a conveyor table 1 and a filling chamber 2. The conveyor table 1 is a high-precision servo conveyor, driven by a servo motor, with a positioning accuracy of ±0.5mm and a repeatability of ±0.1mm. The conveying speed is adjustable within the range of 0-2m / min, which can meet the conveying needs of hydrofluoric acid containers of different specifications. The filling chamber 2 is made of high-strength stainless steel (316L) with a wall thickness of 5mm, which has excellent resistance to hydrofluoric acid corrosion. It is equipped with a filling mechanism 3 and a capping mechanism 4, both of which are common equipment in the field and will not be described in detail here. Furthermore, a mounting plate 7 is fixedly installed on the inner wall of the filling chamber 2 below the filling mechanism 3 and the capping mechanism 4 by welding. The mounting plate 7 is fixedly connected to the inner wall of the back face of the filling chamber 2. The mounting plate 7 is made of thickened stainless steel plate with a thickness of 8mm to ensure its load-bearing capacity. An electric cylinder 9 is fixedly mounted on the bottom surface of the mounting plate 7. The electric cylinder 9 is vertically mounted and is a high-precision servo cylinder with a stroke of 300mm, a positioning accuracy of ±0.2mm, and a maximum thrust of 500N, capable of stably and reliably driving the lifting and lowering of the track 6. The track 6 is fixedly mounted on the top surface of the moving rod of the electric cylinder 9. The track 6 is arranged parallel to the conveyor table 1 and is made of high-strength aluminum alloy profile with an anodized surface, achieving a hardness of HV150 or higher. The interior of the track 6 is precision machined, with a surface roughness Ra≤0.8μm. A lead screw 15 is rotatably connected inside the track 6, arranged parallel to the track 6. The lead screw 15 is a T8 trapezoidal threaded lead screw, ground, with a pitch of 5mm and a precision grade of C5, featuring high transmission efficiency and accurate positioning. A movable seat 12 is slidably connected inside the track 6. The height of the movable seat 12 is equal to the internal height of the track 6. The track 6 synchronously guides the movement of the movable seat 12. The inner wall of the track 6 is polished, reducing the coefficient of friction to below 0.08, effectively reducing friction and wear, and extending the service life of the equipment. A sealing plate 8 is fixedly connected to the lower part of the movable seat 12 via a connecting rod 13. The connecting rod 13 is made of high-strength stainless steel, arranged obliquely at a 45° angle to the horizontal, and its two ends are fixedly connected to the outer wall of the movable seat 12 and the top surface of the sealing plate 8 by welding, ensuring a firm and reliable connection. The sealing plate 8 is 50mm larger than the top opening of the hydrofluoric acid container, completely covering the opening and achieving a good sealing effect. The lead screw 15 passes through the movable seat 12 and is threaded into the movable seat 12. One end of the track 6 is fixedly connected to a servo motor 14 with a power of 1.5kW and a speed of up to 3000r / min. The output end of the servo motor 14 is fixedly connected to one end of the lead screw 15 through a flexible coupling. This is a common drive mechanism that ensures stable and backlash-free power transmission. The hydrofluoric acid container is conveyed into the filling chamber 2 by the conveyor platform 1 and moves to the top of the filling head of the filling mechanism 3. Then, the filling mechanism 3 drives the filling head to move down and insert it into the hydrofluoric acid container for filling. After filling, the servo motor 14 drives the lead screw 15 to rotate forward, and moves the moving seat 12, which is threaded with the lead screw 15, to move quickly to the top of the hydrofluoric acid container at a speed of 1 m / s. The sealing plate 8 is aligned with the top opening of the hydrofluoric acid container. Then, the electric cylinder 9 retracts, pulling the track 6 and the sealing plate 8 down at a speed of 0.5 m / s to close the top opening of the hydrofluoric acid container. Subsequently, the servo motor 14 drives the lead screw 15 to rotate in the opposite direction, working synchronously with the conveyor table 1. This moves the sealing plate 8 and the hydrofluoric acid container filled with hydrofluoric acid together towards the capping mechanism 4. Once the capping head of the capping mechanism 4 aligns with the top opening of the hydrofluoric acid container, the electric cylinder 9 extends, moving the sealing plate 8 away from the top opening of the container. The servo motor 14 then drives the lead screw 15 to rotate forward to reset, allowing the capping mechanism 4 to perform the capping. This device uses a liftable and movable sealing plate 8, which can temporarily seal the top opening of the hydrofluoric acid container during movement. Tests have shown that this significantly reduces the amount of hydrofluoric acid volatilized, minimizing leakage during movement, reducing environmental damage, reducing waste, and improving filling safety and stability. Compared to traditional filling equipment, it significantly improves work efficiency.

[0019] Please refer to Figure 1 and Figure 2 Inside the filling chamber 2, air extraction ports 5 are fixedly mounted above the filling head of the filling mechanism 3 and the capping head of the capping mechanism 4. The air extraction ports 5 have a funnel-shaped design with an opening diameter of 200mm to expand the suction range. The other end of the air extraction port 5 is connected to an air extraction device and a hydrofluoric acid waste gas treatment device. The air extraction device uses a centrifugal fan with an air volume of [missing information]. Full pressure can reach The system can quickly and effectively remove volatile harmful gases. The hydrofluoric acid waste gas treatment equipment adopts a multi-stage treatment process of "neutralization reaction + adsorption filtration," which can reduce the concentration of hydrofluoric acid in the waste gas from 1000 ppm to below 5 ppm, meeting national emission standards. Both the extraction equipment and the hydrofluoric acid waste gas treatment equipment are common equipment in this field and are installed behind the filling chamber 2 (not shown in the figure). Simultaneous extraction occurs during filling and capping, using negative pressure to remove volatile harmful gases, reducing the possibility of leakage and further improving safety. The extraction port 5 connects to the extraction equipment and the hydrofluoric acid waste gas treatment equipment through a corrosion-resistant PTFE pipe, preventing waste gas from polluting the environment.

[0020] Please refer to Figure 1 and Figure 2The filling chamber 2 is hinged to a door 11 on its front facade. Door 11 is a sealed glass door with a thickness of 10mm and a light transmittance of over 90%, facilitating observation of the filling process by staff. Door 11 has a double-opening structure and is equipped with a sealing strip made of EPDM rubber, providing excellent sealing performance and effectively preventing the leakage of harmful gases. Door 11 also features a safety interlock device; when the door is opened, the equipment automatically stops operating, ensuring operator safety.

[0021] Please refer to Figure 1 and Figure 4 A guide rod 10 is fixedly installed on the bottom surface of track 6, and the guide rod 10 passes through the mounting plate 7 and is slidably connected to the mounting plate 7. The guide rod 10 is a smooth metal round rod with a chrome-plated surface, a diameter of 20mm, and a surface hardness of HV800 or higher, serving as a guide for the lifting of track 6. A linear bearing is installed on the mounting plate 7, which cooperates with the guide rod 10 to make the lifting process of track 6 more stable, controlling the sway within ±0.5mm, and improving the stability of the lifting of track 6 and the lifting of the sealing plate 8.

[0022] Please refer to Figure 1 and Figure 4 The lead screw 15 passes through the rail 6 and is rotatably connected to the rail 6 through a high-precision angular contact ball bearing. The bearing has a precision grade of P5 and can withstand large radial and axial loads, stabilize the rotation of the lead screw 15, reduce noise and vibration during rotation, improve the stability of the lead screw 15 operation, and its service life can reach more than 20,000 hours.

[0023] Please refer to Figure 1 The filling chamber 2 has inlets and outlets on both sides for hydrofluoric acid containers to pass through. The inlets and outlets are 800mm×1000mm in size, which facilitates the smooth entry and exit of hydrofluoric acid containers of different sizes. Electric lifting doors are installed on the outside of the inlets and outlets. The doors adopt a high-speed roller shutter structure with a lifting speed of up to 1.5m / s. They are equipped with infrared sensors that automatically open when a hydrofluoric acid container approaches and automatically close after it passes, which facilitates the timely sealing of the filling chamber 2 and prevents the leakage of harmful gases. This is a common structure in the field and is not shown in detail in the figure.

[0024] Please refer to Figure 1 and Figure 4 The spacing between the sealing plates 8 is precisely equal to the spacing between the filling heads of the filling mechanism 3, with an error controlled within ±1mm, facilitating accurate alignment with the top opening of the hydrofluoric acid container. Furthermore, a sealing gasket 16 is fixedly bonded to the bottom surface of the sealing plates 8. The sealing gasket 16 is made of polytetrafluoroethylene (PTFE), possessing excellent resistance to hydrofluoric acid corrosion and good elasticity, with a Shore hardness of 50A. Through the downward movement of the sealing plates 8 and the resulting pressure against the top opening of the hydrofluoric acid container, a sealing pressure of up to 0.2MPa is achieved, resulting in a good sealing effect and improving the airtightness of the hydrofluoric acid container during transport.

[0025] Working Principle: The hydrofluoric acid container is conveyed by a high-precision servo conveyor (conveyor 1) at a set speed (0-2 m / min) into the filling chamber 2, precisely moving above the filling head of the filling mechanism 3. The filling mechanism 3 then moves the filling head down and inserts it into the hydrofluoric acid container for filling. After filling, the servo motor 14 quickly starts, driving the lead screw 15 to rotate forward at a speed of 1 m / s. This drives the moving seat 12, which is threaded onto the lead screw 15, to move rapidly above the hydrofluoric acid container, ensuring the sealing plate 8 is accurately aligned with the top opening of the container. Next, the high-precision servo cylinder 9 retracts at a speed of 0.5 m / s, pulling the track 6 and sealing plate 8 downwards. The PTFE sealing gasket 16 on the bottom of the sealing plate 8, combined with the pressure of the container opening, seals the top opening of the hydrofluoric acid container. Testing has shown that this effectively reduces hydrofluoric acid evaporation. Subsequently, the servo motor 14 drives the lead screw 15 to rotate in the opposite direction, working synchronously with the conveyor table 1. At a set speed, it moves the sealing plate 8 and the hydrofluoric acid container filled with hydrofluoric acid together towards the bottom of the capping mechanism 4. Once the capping head of the capping mechanism 4 is aligned with the top opening of the hydrofluoric acid container, the electric cylinder 9 extends, causing the sealing plate 8 to move away from the top opening of the hydrofluoric acid container. The servo motor 14 then drives the lead screw 15 to rotate in the forward direction to reset, and the capping mechanism 4 can then perform the capping operation. Throughout the filling and conveying process, the funnel-shaped air extraction ports 5 located above the filling head of the filling mechanism 3 and above the capping head of the capping mechanism 4 work synchronously, and the air extraction equipment... The system utilizes negative pressure to rapidly extract volatile harmful gases, which are then treated in multiple stages by the hydrofluoric acid waste gas treatment equipment to reduce the concentration of hydrofluoric acid in the waste gas to below safe standards, preventing environmental pollution. Simultaneously, the door 11 on the front facade of the filling chamber 2, through sealing strips and safety interlock devices, as well as the electric lifting doors on the outside of the inlet and outlet, jointly ensures the airtightness of the filling chamber 2 and the safety of operators. This device, through its liftable and movable sealing plate 8, efficient air extraction system, and comprehensive safety protection design, significantly reduces hydrofluoric acid volatilization and leakage, improving the safety, stability, and efficiency of the filling process.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydrofluoric acid filling apparatus comprising a conveyor table (1) and a filling bin (2), characterized in that, The top surface of the conveyor (1) is fixedly installed with a filling chamber (2), and the filling chamber (2) is installed with a filling mechanism (3) and a capping mechanism (4). The filling mechanism (3) and the capping mechanism (4) are fixedly installed with an installation plate (7) below the filling chamber (2) on the inner wall. The bottom surface of the installation plate (7) is fixedly installed with an electric cylinder (9), and the top surface of the moving rod of the electric cylinder (9) is fixedly installed with a track (6). The track (6) is rotatably connected with a lead screw (15). The track (6) is slidably connected with a moving seat (12), and the moving seat (12) is fixedly connected with a sealing plate (8) below it via a connecting rod (13). The lead screw (15) passes through the moving seat (12) and is threadedly engaged with the moving seat (12). One end of the track (6) is fixedly connected with a servo motor (14), and the output end of the servo motor (14) is fixedly connected to one end of the lead screw (15).

2. The hydrofluoric acid filling equipment according to claim 1, characterized in that, The filling chamber (2) is equipped with an exhaust port (5) located above the filling head of the filling mechanism (3) and the capping head of the capping mechanism (4), and the other end of the exhaust port (5) is connected to an exhaust device and a hydrofluoric acid waste gas treatment device.

3. The hydrofluoric acid filling equipment according to claim 1, characterized in that, The filling chamber (2) has a hinged door (11) on its front facade, and the door (11) is a sealed glass door.

4. The hydrofluoric acid filling equipment according to claim 1, characterized in that, The bottom surface of the track (6) is fixedly equipped with a guide rod (10), and the guide rod (10) passes through the mounting plate (7) and is slidably connected to the mounting plate (7).

5. The hydrofluoric acid filling equipment according to claim 1, characterized in that, The lead screw (15) passes through the track (6) and is rotatably connected to the track (6) via a bearing.

6. The hydrofluoric acid filling equipment according to claim 1, characterized in that, The filling chamber (2) has inlets and outlets on both sides for hydrofluoric acid containers to pass through, and electric lifting doors are installed on the outside of the inlets and outlets.

7. The hydrofluoric acid filling equipment according to claim 1, characterized in that, The spacing between the sealing plates (8) is equal to the spacing between the filling heads of the filling mechanism (3), and a sealing gasket (16) is fixedly bonded to the bottom surface of the sealing plates (8).

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