Buffering air cylinder with stroke limiting detection function
By adding a pressure detection port and detection device to the shell-breaking cylinder, the problem of shell-breaking hammer head sticking to the shell was solved, the production stability and continuity of the aluminum electrolysis cell were improved, and the equipment failure rate and maintenance costs were reduced.
Patent Information
- Application Number
- CN202520029868.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-07
AI Technical Summary
In existing aluminum electrolysis cells, the problem of the shell-breaking hammer sticking to the packaging leads to poor material addition, affecting the continuity and stability of production. Moreover, the existing solutions are costly, have a high failure rate, and are complex to maintain, making them difficult to promote in large-scale production.
A pressure detection port and detection device are added to the shell-breaking cylinder structure. The piston stroke is monitored by a pressure sensor or switch, and the piston movement is adjusted in real time to reduce the residence time of the hammer head in the high-temperature electrolyte.
It enables effective monitoring of piston stroke in high-temperature environments, reduces sticking, improves production stability and continuity, and reduces equipment failure rate and maintenance costs.
Smart Images
Figure CN223839455U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of intelligent aluminum shelling technology, and in particular to a buffer cylinder with stroke limit detection function. Background Technology
[0002] In the aluminum electrolysis industry, modern large-scale prebaked cell electrolysis processes all employ a mid-point feeding method for material addition. The addition of alumina is precisely controlled by an advanced cell control machine. Before alumina feeding, the shell-breaking cylinder performs a full-stroke shell-breaking operation to prepare for the feeding process. Conventional cylinders can use magnetic switches or sensors to detect limit switches and reverse direction, but this cannot be used in electrolysis production workshops due to the presence of strong magnetic fields. Therefore, an extended shell-breaking time is used to ensure success. However, when the shell-breaking hammer is immersed in high-temperature electrolyte for an extended period, the electrolyte adheres to the hammer and gradually solidifies. Over time, the adhered electrolyte increases in size, forming clumps. These clumps not only hinder the normal movement of the hammer, obstructing the shell-breaking action, but may also prevent material from effectively entering the electrolyte, severely impacting the electrolysis process. Therefore, while ensuring unobstructed flow at the feeding port, an electrical signal is provided when the piston reaches the bottom of its stroke to promptly return the piston rod of the cylinder, reducing the time the hammer remains in the high-temperature electrolyte. This solves the problem of less shell sticking to the hammerhead, becoming the key to achieving efficient material control in aluminum electrolysis cells.
[0003] To address the aforementioned issues, existing technologies involve expanding the functionality of the shell-breaking equipment by adding various monitoring systems and devices. While existing literature and reports present numerous solutions aimed at ensuring the opening ratio of the discharge port while controlling the shell-breaking hammer's non-sticking to the package, these solutions theoretically meet the non-sticking requirements. However, in practical applications, they generally face significant challenges. First, the implementation costs of these solutions are generally high, increasing the economic burden on manufacturing enterprises and limiting their promotion and application in large-scale production. Second, due to the complexity and harshness of the environment above the electrolytic cell, these solutions suffer from high equipment failure rates, severely impacting the continuity and stability of production. Furthermore, the maintenance costs and difficulties of these solutions are substantial, requiring regular inspections and maintenance by professional personnel, increasing the complexity and cost of operation and maintenance. Therefore, a low-cost, user-friendly, and simple-to-operate aluminum electrolytic cell shell-breaking device is urgently needed in the market. Utility Model Content
[0004] To solve the above problems, this utility model provides the following solution:
[0005] A buffer cylinder with stroke limit detection function includes a cylinder barrel, a front cover at the front end of the cylinder barrel, and a rear cover at the rear end of the cylinder barrel. The front and rear covers are equipped with buffer sealing rings, which, together with the buffer plunger on the piston and the piston, form front and rear buffer chambers. A rod-side air inlet communicating with the front buffer chamber is opened on the side wall of the front cover, and a front air pressure detection port communicating with the interior of the cylinder barrel is opened between the side wall of the front cover and the front buffer chamber. A rodless air inlet communicating with the rear buffer chamber is opened on the side wall of the rear cover, and a rear air pressure detection port communicating with the interior of the cylinder barrel is opened between the side wall of the rear cover and the rear buffer chamber. A piston is disposed inside the cylinder barrel, and a piston rod is disposed at the front end of the piston, passing through the front cover. A pressure sensor or pressure switch is disposed in the front or rear air pressure detection port.
[0006] Furthermore, a front buffer column is provided at the front end of the piston corresponding to the front buffer chamber, and a rear buffer column is provided at the rear end of the piston corresponding to the rear buffer chamber. When the piston moves to the frontmost position, the front buffer column is embedded in the front buffer chamber, and when the piston moves to the rearmost position, the rear buffer column is embedded in the rear buffer chamber.
[0007] Furthermore, the front end cover has a front throttle hole that connects the inside of the cylinder to the air inlet of the rod chamber; the rear end cover has a rear throttle hole that connects the inside of the cylinder to the air inlet of the rodless chamber.
[0008] Furthermore, a front throttle valve is provided inside the cylinder and at the rod chamber inlet, and a rear throttle valve is provided inside the cylinder and at the rodless chamber inlet.
[0009] Furthermore, both the front-end air pressure detection port and the rear-end air pressure detection port are air pressure sensors or air pressure switches; one of the front-end air pressure detection ports or the rear-end air pressure detection port is equipped with an air pressure sensor or an air pressure switch.
[0010] The beneficial effect of this utility model is that, based on the original shell-breaking cylinder structure, a pressure detection port is opened on the front and rear covers, and a detection device is set in the pressure detection port to monitor the piston stroke so as to adjust the piston movement in real time. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model.
[0012] 1. Rear end cap; 2. Cylinder; 3. Piston; 4. Piston rod; 5. Front end cap; 6. Rod chamber inlet; 7. Front throttle orifice; 8. Rear throttle orifice; 9. Rodless chamber inlet; 10. Rear air pressure detection port; 11. Front air pressure detection port; 12. Rear buffer chamber; 13. Front buffer chamber; 14. Front buffer plunger; 15. Rear buffer plunger. Detailed Implementation
[0013] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be further described in detail below with reference to embodiments. Specific details will be involved in the following description to ensure a thorough understanding of the present invention. However, the present invention can still be realized without these specific details, meaning that those skilled in the art can more effectively explain the nature of their work to other skilled in the art using these descriptions and statements herein. Furthermore, it should be understood that the specific embodiments described herein are merely illustrative of the application and are not intended to limit the actual scope of protection. All raw materials used in the following embodiments are commercially available products.
[0014] Example 1: As Figure 1 As shown, a buffer cylinder with stroke limit detection function includes a cylinder barrel 2, a piston 3 disposed inside the cylinder barrel 2, a piston rod 4 disposed at the front end of the piston 3, and the piston rod 4 passing through a front end cover 5; the piston 3 is provided with front and rear buffer plungers 14 and 15, the front end cover 5 is disposed at the front end of the cylinder barrel 2, and the rear end cover 1 is disposed at the rear end of the cylinder barrel 2. The internal space of the cylinder barrel 2 between the front end cover 5 and the front buffer plunger 14 forms a front buffer chamber 13, which is also called a rod chamber chamber. A rod chamber air inlet is opened on the side wall of the front end cover 5. The front end cover 5 has a front air pressure detection port 11 on its outer wall, which is connected to the inside of the cylinder 2. The space inside the cylinder 2 between the rear end cover 1 and the rear buffer plunger 15 forms a rear buffer chamber 12, which is also called a rodless chamber chamber. The outer wall of the rear end cover 1 has a rodless chamber inlet 9 that is connected to the rear buffer chamber 12. The outer wall of the rear end cover 1 has a front air pressure detection port 10 that is connected to the inside of the cylinder 2. Both the front air pressure detection port 11 and the rear air pressure detection port 10 are equipped with air pressure switches or sensors.
[0015] When piston 3 moves to the front end, front buffer plunger 14 is embedded in front buffer chamber 13 provided on front cover 5. When piston 3 moves to the rear end, rear buffer plunger 15 is embedded in rear buffer chamber 12 provided on rear cover 1.
[0016] The front end cover 5 is provided with a front throttle hole 7 or a front throttle valve that connects the inside of the cylinder 2 to the rod chamber air inlet 6; the rear end cover 1 is provided with a rear throttle hole 8 or a rear throttle valve that connects the inside of the cylinder 2 to the rodless chamber air inlet 9. Throttling valves are installed in the front throttle hole 7 and the rear throttle hole 8.
[0017] This utility model modifies the original shell-breaking cylinder structure by opening air pressure detection ports on the front cover 5 and the rear cover 1, and setting a detection device in the air pressure detection ports to monitor the piston stroke so as to adjust the piston movement in real time.
[0018] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The descriptions of the embodiments above are only intended to help understand the principles of the embodiments of this utility model. Detection can be set at both ends simultaneously for bidirectional travel detection, or detection can be set at only one end for unidirectional travel detection. Furthermore, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A buffer cylinder with stroke limit detection function, characterized in that: The system includes a cylinder, a front cover at the front end of the cylinder, and a rear cover at the rear end of the cylinder. Both the front and rear covers are equipped with buffer sealing rings, which, together with the buffer plunger on the piston and the piston, form front and rear buffer chambers. A rod-side air inlet communicating with the front buffer chamber is opened on the side wall of the front cover, and a front pressure detection port communicating with the interior of the cylinder is opened between the side wall of the front cover and the front buffer chamber. A rodless air inlet communicating with the rear buffer chamber is opened on the side wall of the rear cover, and a rear pressure detection port communicating with the interior of the cylinder is opened between the side wall of the rear cover and the rear buffer chamber. A piston is installed inside the cylinder, with a piston rod at the front end of the piston, passing through the front cover. A pressure sensor or pressure switch is installed in either the front or rear pressure detection port.
2. A buffer cylinder with stroke limit detection function as described in claim 1, characterized in that: The piston front end is provided with a front buffer column corresponding to the front buffer air chamber, and the piston rear end is provided with a rear buffer column corresponding to the rear buffer air chamber. When the piston moves to the front end, the front buffer column is embedded in the front buffer air chamber, and when the piston moves to the rear end, the rear buffer column is embedded in the rear buffer air chamber.
3. A buffer cylinder with stroke limit detection function as described in claim 1, characterized in that: The front end cover has a front throttling orifice that connects the inside of the cylinder to the air inlet of the rod chamber; the rear end cover has a rear throttling orifice that connects the inside of the cylinder to the air inlet of the rodless chamber.
4. A buffer cylinder with stroke limit detection function as described in claim 1, characterized in that: A front throttle valve is installed inside the cylinder and at the rod chamber inlet, and a rear throttle valve is installed inside the cylinder and at the rodless chamber inlet.
5. A buffer cylinder with stroke limit detection function as described in claim 1, characterized in that: Both the front-end and rear-end air pressure detection ports are equipped with air pressure sensors or air pressure switches; one of the front-end or rear-end air pressure detection ports may be equipped with an air pressure sensor or air pressure switch.