Gas cylinder valve positioning device and method for portable gas stove

Abstract

The invention provides a positioning device for a gas cylinder valve of a portable gas stove, which relates to the technical field of gas container manufacturing equipment, and comprises a star wheel conveying unit, a positioning station, a positioning unit and a positioning unit, the first pressure head is arranged right above the rotating device, the edge of the lower end of the first pressure head is provided with a resettable positioning pin, the first pressure head is a two-section downward-pressing type pressure head, and the positioning pin corresponds to the position of a metal ring of the gas cylinder valve; and the color code sensor is arranged on one side of the station, and the position relation between the color code sensor and the positioning pin corresponds to the position relation between the welding seam on the bottle body and the indication slogan. The friction force between the rotating device and the bottle body is larger than that between the positioning pin and the metal ring. The invention also provides a positioning method using the device. Through the design based on the friction force difference and in cooperation with detection of the color code sensor, automatic and accurate positioning of the notch of the gas cylinder valve and the indication slogan on the cylinder body is achieved, manual operation is replaced, and the product consistency is improved. And the reliable positioning effect is ensured through double-vacuum-pumping fixation.

Description

Technical Field

[0001] The invention relates to the technical field of gas container manufacturing equipment, and in particular to a cassette furnace gas bottle valve positioning device and method. Background Art

[0002] A cartridge stove is also known as a portable butane stove. It requires a special gas cylinder as a fuel supply device. A metal ring is provided on the valve of the gas cylinder, which is used to cooperate with the magnet on the cartridge stove to achieve connection. In order to ensure the correct connection between the cartridge stove and the gas cylinder, a notch is provided on the edge of the metal ring. When using it, the notch needs to be aligned with the bayonet of the cartridge stove. At the same time, in order to guide consumers to correctly install the gas cylinder into the cartridge stove, instruction slogans will be printed on the packaging of the gas cylinder. For example, "This side is facing up", the slogan is set on the same side of the notch, so that consumers can see the notch while seeing the slogan.

[0003] At present, during the assembly process of the gas cylinder valve and the bottle body, the valve needs to be placed on the open end of the bottle body first, and then the notch of the valve needs to be manually aligned with the slogan on the bottle body. Since the valve and the bottle body have not been fixed at this time and are only in a simple placement state, the operator needs to gently twist the valve to adjust the position of the notch. After the alignment is completed, the valve and the bottle body are transported to the sealing machine as a whole for sealing, in preparation for the subsequent inflation process.

[0004] However, the above production process has the following technical problems: the alignment operation between the valve notch and the slogan is completely manual, and the operator needs to visually judge the relative position of the notch and the slogan and adjust it manually. This method is prone to offset, resulting in poor product consistency. Especially in the continuous production process, due to factors such as personnel fatigue, the alignment accuracy will be further reduced, seriously affecting product quality. In addition, since there is no reliable fixing measure between the valve and the bottle body after alignment and before sealing, relative displacement is likely to occur during the transmission process, resulting in failure of the early alignment. Summary of the invention

[0005] The object of the present invention is to provide a gas cylinder valve positioning device and method for a gas cylinder, which can realize automatic and accurate positioning of a notch of the gas cylinder valve and an indication label on the bottle body.

[0006] To achieve the above object, the present invention is implemented through the following technical solutions:

[0007] A cassette furnace gas cylinder valve positioning device, comprising:

[0008] A star wheel transmission unit, the star wheel transmission unit comprises at least one positioning station, a rotating device is provided at the bottom of the positioning station;

[0009] A first pressure head is arranged directly above the rotating device, a resettable positioning pin is arranged at the lower edge of the first pressure head, the first pressure head is a two-stage downward pressure head, and the positioning pin corresponds to the position of the metal ring of the valve of the gas cylinder to be assembled; the friction between the rotating device and the gas cylinder body is greater than the friction between the positioning pin and the metal ring of the gas cylinder valve;

[0010] The color mark sensor is arranged at one side of the workstation, and the positional relationship between the color mark sensor and the positioning pin corresponds to the positional relationship between the weld and the indication slogan on the body of the cassette furnace gas cylinder to be assembled.

[0011] Furthermore, a rubber pad is provided on the upper surface of the rotating device to increase the friction between the rotating device and the bottle body.

[0012] Furthermore, the end surface of the positioning pin is a smooth surface, so as to further reduce the friction between the positioning pin and the metal ring of the gas cylinder valve.

[0013] Furthermore: a first vacuum suction port is provided at the center of the lower end of the first pressure head.

[0014] Furthermore: the star wheel transmission unit also includes at least one fixed station, the fixed station includes a second pressure head and a second vacuum suction port installed at the lower end of the second pressure head, and the second vacuum suction port is located directly above the valve of the gas cylinder of the cassette furnace to be assembled.

[0015] Furthermore, the star wheel transmission unit is driven by the first motor, and the star wheel transmission is connected to the first motor through a gear transmission. The gear transmission can realize the accurate position transmission of the gas cylinder of the cassette furnace to be assembled.

[0016] Furthermore, the rotating device includes a transmission shaft, a tray fixed on the upper end of the transmission shaft, and a second motor connected to the transmission shaft through a transmission belt. The belt drive is suitable for high-speed transmission and has a certain overload protection capability, which can make the bottle body rotate quickly, realize the rapid positioning between the bottle body and the valve, and reduce the collision damage between the bottle body and the valve during the positioning process.

[0017] The present invention also provides a method for positioning a cassette furnace gas cylinder valve using the cassette furnace gas cylinder valve positioning device, comprising the following steps:

[0018] S1: transport the gas cylinder to be positioned to the positioning station;

[0019] S2: starting the first stage of downward pressure of the first pressure head, so that the positioning pin abuts against the metal ring of the gas cylinder valve and is compressed;

[0020] S3: starting the rotating device to drive the gas cylinder body and the valve to rotate together until the gap of the metal ring reaches the positioning pin, and the positioning pin is reset and enters the gap to limit the valve;

[0021] S4: Continue to rotate the rotating device to drive the gas cylinder body to rotate until the color mark sensor detects the weld and the rotating device stops rotating;

[0022] S5: Stop the rotating device.

[0023] Further: in S4, the operating angle of the rotating device in the current positioning cycle is detected. If the operating angle is less than 360 degrees, the rotating device does not stop running until the color mark sensor detects the weld of the gas cylinder body for the second time, and then controls the rotating device to stop running.

[0024] Further: the following steps are also included:

[0025] S6: starting the second stage of downward pressing of the first pressure head to align the first vacuum suction port with the air hole of the valve;

[0026] S7: performing vacuuming through the first vacuum suction port to initially suction and fix the bottle body and the valve;

[0027] S8: transporting the gas cylinder to a workstation provided with the second vacuum suction port;

[0028] S9: The second pressure head is pressed down to the air hole of the second vacuum suction port to connect with the valve, and a second vacuum is performed through the second vacuum suction port to finally suck and fix the bottle body and the valve.

[0029] Compared with the prior art, the present invention achieves the following beneficial effects by reasonably setting the structures of the rotating device, the first pressure head and the color mark sensor and their mutual coordination relationship:

[0030] 1. The present invention sets a rubber pad on the rotating device and sets a positioning pin with a smooth surface on the lower edge of the first pressure head, so that the friction between the rotating device and the gas cylinder body is greater than the friction between the positioning pin and the metal ring of the gas cylinder valve. Therefore, when the rotating device is started, the gas cylinder body and the valve can be driven to rotate together first, until the positioning pin enters the gap of the metal ring, and then only the cylinder body is driven to rotate. This design based on friction difference allows the valve to automatically stop at the correct position without manual adjustment, effectively avoiding positioning deviation caused by manual operation.

[0031] Second, by setting the color mark sensor on one side of the workstation and making the positional relationship between the color mark and the positioning pin correspond to the positional relationship between the weld and the instruction label on the gas cylinder body, when the bottle body continues to rotate until the color mark sensor detects the weld, the notch of the valve must be on the same side as the instruction label on the bottle body, thereby achieving automatic and precise positioning of the notch of the gas cylinder valve and the instruction label on the bottle body.

[0032] 3. The vacuum suction ports respectively arranged on the first pressure head and the second pressure head can effectively prevent the valve from shifting in subsequent processes after positioning through two vacuuming operations, thereby ensuring that the positioning effect is reliably maintained.

[0033] Fourth, it replaces manual operation, improves product consistency, and ensures the reliability of positioning effect through double vacuum fixation, fundamentally solving the technical problems existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is an isometric schematic diagram of a cassette furnace gas cylinder valve positioning device of the present invention;

[0035] Figure 2 It is a front view schematic diagram of a cassette furnace gas cylinder valve positioning device of the present invention;

[0036] Figure 3 for Figure 2 Schematic diagram of the AA direction view;

[0037] Figure 4 is a schematic diagram of the structure at the lower end of the first pressure head;

[0038] Figure 5 Schematic diagram of the structure of a rotating device in an embodiment.

[0039] In the figure:

[0040] 1. Star wheel transmission unit; 1.1. Star wheel; 1.2. Guard plate; 2. First pressure head; 2.1. Positioning pin; 2.2. First vacuum suction port; 3. Positioning station; 4. Fixed station; 5. Second pressure head; 6. First motor; 7. Second motor; 8. Rotating device; 8.1. Tray; 8.2. Rubber pad; 8.3. Transmission shaft; 9. Color mark sensor. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] The present invention provides a cassette furnace gas cylinder valve positioning device, which is used to realize automatic positioning of the valve and the bottle body during the production process of the cassette furnace gas cylinder. The device includes a star wheel transmission unit 1, a first pressure head 2 and a color mark sensor 9. The star wheel transmission unit 1 is driven by a first motor 6 through a gear transmission method, and can realize accurate position transmission of the gas cylinder. At least one positioning station 3 is provided on the star wheel transmission unit 1. In this embodiment, there are 4 positioning stations 3, and a rotating device 8 is provided at the bottom of each positioning station 3. The rotating device 8 includes a transmission shaft 8.3, a tray 8.1 fixed to the upper end of the transmission shaft 8.3, and a second motor 7 connected to the transmission shaft 8.3 through a transmission belt transmission. The belt transmission method is not only suitable for high-speed transmission, but also has a certain overload protection capability, which can make the bottle body rotate quickly to realize rapid positioning between the bottle body and the valve, while reducing the collision damage between the bottle body and the valve during the positioning process.

[0044] In another embodiment, the star wheel transmission unit 1 comprises a star wheel 1.1 and a guard plate 1.2, wherein a plurality of grooves are arranged on the circumference of the star wheel 1.1, the curvature of the grooves is designed according to the curvature of the body of the target gas cylinder, and the guard plate 1.2 is arranged according to the body diameter of the target gas cylinder. Furthermore, the star wheel transmission unit 1 is detachable, and when it is necessary to complete the positioning task of gas cylinders of other specifications, it can be directly replaced with a star wheel 1.1 and a guard plate 1.2 of corresponding specifications.

[0045] The first pressure head 2 is arranged directly above the rotating device 8, and a resettable positioning pin 2.1 is provided at the lower edge thereof. The positioning pin 2.1 is connected to the first pressure head 2 by a spring to realize the reset function. The positioning pin 2.1 is located at the metal ring position of the valve of the gas cylinder of the gas stove to be assembled, and its end surface is polished to become a smooth surface to reduce the friction between the metal ring. A rubber pad 8.2 is provided on the upper surface of the rotating device 8 to increase the friction between the rotating device 8 and the bottle body. Through the above design, the friction between the rotating device 8 and the gas cylinder body is greater than the friction between the positioning pin 2.1 and the metal ring of the gas cylinder valve. The first pressure head 2 is a two-stage downward pressure head, and a first vacuum suction port 2.2 is also provided at the center of its lower end.

[0046] The color mark sensor 9 is arranged at one side of the workstation, and the positional relationship between the color mark sensor 9 and the positioning pin 2.1 corresponds to the positional relationship between the weld and the indication label on the body of the gas cylinder to be assembled. Specifically, when the positioning pin 2.1 enters the gap of the valve metal ring, as the body of the gas cylinder continues to rotate until the color mark sensor 9 detects the weld, the gap must be on the same plane as the indication label on the body of the gas cylinder.

[0047] The star wheel conveying unit 1 further includes at least one fixed station 4. In this embodiment, there are four fixed stations 4, each of which is provided with a second pressure head 5, and a second vacuum suction port is installed at the lower end of the second pressure head 5. The second vacuum suction port is located directly above the valve of the gas cylinder of the cassette furnace to be assembled, and is used for secondary vacuuming of the gas cylinder after positioning.

[0048] In another embodiment, the present invention also provides a method for positioning a gas cylinder valve of a gas furnace, as follows: first, the gas cylinder to be positioned is transported to the positioning station 3, and the first section of the first pressure head 2 is started to press down, so that the positioning pin 2.1 abuts against the metal ring of the gas cylinder valve and is compressed. Then, the rotating device 8 is started. Since the friction between the rotating device 8 and the bottle body is greater than the friction between the positioning pin 2.1 and the metal ring, the rotating device 8 can drive the gas cylinder body and the valve to rotate together. When the notch of the metal ring rotates to the positioning pin 2.1, the positioning pin 2.1 is reset under the action of the spring and enters the notch, thereby limiting the valve. At this time, the rotating device 8 continues to rotate. Since the positioning pin 2.1 has entered the notch, only the gas cylinder body is driven to rotate until the color code sensor 9 detects the weld, and the rotating device 8 stops rotating. At this time, the notch of the valve and the indicator label on the bottle body are already on the same surface.

[0049] In some extreme working conditions, after the gas cylinder to be positioned enters the positioning station 3, the weld of the bottle body is very close to the color mark sensor 9, while the gap on the metal ring is still very far from the positioning pin 2.1. This means that after the color mark sensor 9 recognizes the weld of the bottle body, it will immediately control the rotating device 8 to stop. At this time, the positioning pin 2.1 does not even enter the gap on the metal ring, which will cause the positioning task to fail.

[0050] The present invention proposes another preferred embodiment to cope with the above-mentioned extreme working conditions. In the above-mentioned positioning process, the running angle of the rotating device 8 in the current positioning cycle is detected. If the running angle is less than 360 degrees, the rotating device 8 will not stop running until the color mark sensor 9 detects the weld of the gas cylinder body for the second time, and then the rotating device 8 is controlled to stop running. Through the above optional scheme, when the running angle of the rotating device 8 is less than 360 degrees, the system defaults that the positioning pin 2.1 has not successfully entered the gap on the metal ring. Therefore, even after the color mark sensor 9 recognizes the weld of the bottle body, the rotating device 8 will not stop. When the running angle of the rotating device 8 is greater than 360 degrees, it is assumed that the positioning pin 2.1 has successfully entered the gap on the metal ring. When the color mark sensor 9 detects the weld of the gas cylinder body for the second time, the rotating device 8 is controlled to stop running to complete the positioning task. At the same time, through the above preferred scheme, the device does not need to detect whether the positioning pin 2.1 has successfully entered the gap on the metal ring, so the use of a set of sensors can be reduced, reducing the cost of the positioning device.

[0051] After positioning is completed, the second stage of the first pressure head 2 is started to press down, so that the first vacuum suction port 2.2 is aligned with the air hole of the valve, and vacuum is drawn through the first vacuum suction port 2.2 to initially suck and fix the bottle body and the valve. Subsequently, the gas cylinder is transported to the station provided with the second vacuum suction port, and the second pressure head 5 is pressed down until the second vacuum suction port is connected to the air hole of the valve, and a second vacuum is drawn through the second vacuum suction port to finally suck and fix the bottle body and the valve to prevent relative displacement in subsequent processes.

[0052] The embodiment of the above-mentioned method for positioning the valve of a gas cylinder of a cassette furnace is further described below through specific method steps to more clearly illustrate the process logic of the method for positioning the valve of a gas cylinder of a cassette furnace.

[0053] The following steps are involved:

[0054] S1: transport the gas cylinder to be positioned to the positioning station;

[0055] S2: starting the first stage of downward pressure of the first pressure head, so that the positioning pin abuts against the metal ring of the gas cylinder valve and is compressed;

[0056] S3: starting the rotating device to drive the gas cylinder body and the valve to rotate together until the gap of the metal ring reaches the positioning pin, and the positioning pin is reset and enters the gap to limit the valve;

[0057] S4: the rotating device continues to drive the gas cylinder body to rotate until the color mark sensor detects the weld of the gas cylinder body, and the rotating device stops running;

[0058] Among them, in a more preferred embodiment, the running angle of the rotating device in the current positioning cycle is detected. If the running angle is less than 360 degrees, the rotating device will not stop running until the color mark sensor detects the weld of the gas cylinder body for the second time, and then the rotating device is controlled to stop running;

[0059] S5: Stop the rotating device;

[0060] S6: starting the second stage of downward pressing of the first pressure head to align the first vacuum suction port with the air hole of the valve;

[0061] S7: performing vacuuming through the first vacuum suction port to initially suction and fix the bottle body and the valve;

[0062] S8: transporting the gas cylinder to a fixed station where the second vacuum suction port is located;

[0063] S9: The second pressure head is pressed down to the air hole of the second vacuum suction port to connect with the valve, and a second vacuum is performed through the second vacuum suction port to finally suck and fix the bottle body and the valve.

[0064] Through the above device and working process, the present invention realizes automatic and accurate positioning of the gas cylinder valve and the cylinder body, completely replaces manual operation, and significantly improves product consistency. At the same time, through the double vacuum fixing method, the reliability of the positioning effect is effectively ensured.

[0065] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A cassette furnace gas cylinder valve positioning device, characterized in that: include: A star wheel transmission unit, the star wheel transmission unit comprises at least one positioning station, a rotating device is provided at the bottom of the positioning station; A first pressure head is arranged directly above the rotating device, a resettable positioning pin is arranged at the lower edge of the first pressure head, the first pressure head is a two-stage downward pressure head, and the positioning pin corresponds to the position of the metal ring of the valve of the gas cylinder to be assembled; the friction between the rotating device and the bottom of the gas cylinder body is greater than the friction between the positioning pin and the metal ring of the gas cylinder valve; The color mark sensor is arranged at one side of the workstation and is used to detect the weld of the gas cylinder body. The positional relationship between the color mark sensor and the positioning pin corresponds to the positional relationship between the weld and the indication slogan on the gas cylinder body of the cassette furnace to be assembled.

2. A cassette furnace gas cylinder valve positioning device according to claim 1, characterized in that: A rubber pad is arranged on the upper surface of the rotating device.

3. A cassette furnace gas cylinder valve positioning device according to claim 1, characterized in that: The end surface of the positioning pin is a smooth surface.

4. A cassette furnace gas cylinder valve positioning device according to claim 1, characterized in that: A first vacuum suction port is provided at the center of the lower end of the first pressure head.

5. The cassette furnace gas cylinder valve positioning device according to claim 1, characterized in that: The star wheel transmission unit also includes at least one fixed station, which includes a second pressure head and a second vacuum suction port installed at the lower end of the second pressure head, and the second vacuum suction port is located directly above the valve of the gas cylinder of the cassette furnace to be assembled.

6. A cassette furnace gas cylinder valve positioning device according to claim 1, characterized in that: The star wheel transmission unit is driven by a first motor, and the star wheel transmission is connected to the first motor through a gear transmission.

7. A cassette furnace gas cylinder valve positioning device according to claim 1, characterized in that: The rotating device comprises a transmission shaft, a tray fixed to the upper end of the transmission shaft, and a second motor connected to the transmission shaft through a transmission belt.

8. A method for positioning a valve of a cassette furnace gas cylinder, applied to the cassette furnace gas cylinder valve positioning device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: transport the gas cylinder to be positioned to the positioning station; S2: starting the first stage of downward pressure of the first pressure head, so that the positioning pin abuts against the metal ring of the gas cylinder valve and is compressed; S3: starting the rotating device to drive the gas cylinder body and the valve to rotate together until the gap of the metal ring reaches the positioning pin, and the positioning pin is reset and enters the gap to limit the valve; S4: the rotating device continues to drive the gas cylinder body to rotate until the color mark sensor detects the weld of the gas cylinder body, and the rotating device stops running; S5: Stop the rotating device.

9. A method for positioning a gas cylinder valve of a cassette furnace according to claim 8, characterized in that: The following steps are also included: In S4, the running angle of the rotating device in the current positioning cycle is detected. If the running angle is less than 360 degrees, the rotating device does not stop running until the color mark sensor detects the weld of the gas cylinder body for the second time, and then controls the rotating device to stop running.

10. A method for positioning a gas cylinder valve of a cassette furnace according to claim 8, characterized in that: The following steps are also included: S6: starting the second stage of downward pressing of the first pressure head to align the first vacuum suction port with the air hole of the valve; S7: performing vacuuming through the first vacuum suction port to initially suction and fix the bottle body and the valve; S8: transporting the gas cylinder to a fixed station where the second vacuum suction port is located; S9: The second pressure head is pressed down to the air hole of the second vacuum suction port to connect with the valve, and a second vacuum is performed through the second vacuum suction port to finally suck and fix the bottle body and the valve.

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