Automatic material returning device for high-pressure gas cylinder

Abstract

The utility model relates to the technical field of high-pressure gas cylinder machining equipment, in particular to an automatic material returning device for a high-pressure gas cylinder. An automatic material returning device for a high-pressure gas cylinder comprises a core rod fixing structure and a material returning structure, the core rod fixing structure and the material returning structure are arranged at intervals in the axial direction of a core rod, the core rod fixing structure is used for fixing one end of the core rod to the core rod fixing structure, and the material returning structure is used for fixing the other end of the core rod to the core rod fixing structure. The core rod fixing structure slides in a reciprocating mode in the axial direction of the core rod to be close to or away from the material returning structure, and the material returning structure is used for allowing the bottle blank and the core rod to penetrate through and used for abutting against a bottle opening of the bottle blank. The device has the following effects that in the process that the core rod fixing structure slides to be close to the material returning structure, the core rod and the bottle blank arranged on the core rod in a sleeving mode are pushed together to penetrate through the material returning structure, and then the core rod fixing structure drives the core rod to slide to be away from the material returning structure, so that the core rod and the bottle blank are separated; the probability that the inner surfaces of the bottle blanks are damaged by ejection in the bottle blank returning process is reduced, and the quality of the inner surfaces of high-end gas cylinders is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of high-pressure gas cylinder processing equipment, in particular to an automatic material returning device for a high-pressure gas cylinder. BACKGROUND

[0002] According to the Gas Cylinder Safety Technical Regulations, the gas cylinders containing nitric oxide, fluorine, difluoride oxygen and fluorine-nitrogen mixed gas should adopt a non-regulated bottom structure steel seamless cylinder, and the gas cylinders containing helium and electronic gas should preferentially adopt a non-regulated bottom structure steel seamless cylinder.

[0003] In the gas cylinder manufacturing industry, especially in the process of producing steel seamless cylinders, cold spinning and drawing processes are widely used to improve the quality and performance of the cylinders, which can effectively reduce the weight of the cylinders, ensure that the surface of the cylinders is defect-free and the thickness is uniform, thereby meeting the needs of the high-end market. However, whether it is direct punching or cold spinning, the mandrel mold needs to be inserted into the bottle blank for cylinder production, so how to efficiently realize the material returning of the bottle blank from the mandrel becomes an important technical problem.

[0004] At present, the common bottle blank material returning methods mainly include internal ejection and plug door type material returning. Among them, the internal ejection material returning method has a complex structure, and the ejection rod is relatively long, which often causes the ejection rod to bend and deform. When the ejection rod is ejected, it needs to be in direct contact with the bottle blank, which can easily cause the inner surface of the bottle blank to be damaged, seriously affecting the inner surface quality of the high-end cylinder. CONTENT OF THE INVENTION

[0005] In order to reduce the probability of the inner surface of the bottle blank being damaged during the bottle blank material returning process and improve the inner surface quality of the high-end cylinder, the application provides an automatic material returning device for a high-pressure gas cylinder.

[0006] The automatic material returning device for a high-pressure gas cylinder provided by the application adopts the following technical scheme: a mandrel fixing structure and a material returning structure are arranged along the axial direction of the mandrel, the mandrel fixing structure is used to fix one end of the mandrel to the mandrel fixing structure, the mandrel fixing structure reciprocally slides along the axial direction of the mandrel to approach or move away from the material returning structure, the material returning structure is used for the bottle blank and the mandrel to pass through, and the material returning structure is used to abut against the bottle mouth of the bottle blank.

[0007] By adopting the above technical scheme, the mandrel and the bottle blank sleeved on the mandrel are pushed to pass through the material returning structure during the process of the mandrel fixing structure sliding to approach the material returning structure, and then the mandrel fixing structure drives the mandrel to slide away from the material returning structure. At this time, the material returning structure abuts against the bottle mouth of the bottle blank, and when the mandrel is completely pulled out from the bottle blank, the separation of the mandrel and the bottle blank is realized, thereby reducing the probability of the inner surface of the bottle blank being damaged during the bottle blank material returning process and improving the inner surface quality of the high-end cylinder.

[0008] Preferably, the material returning structure comprises a material returning base plate and two material returning clamping plates, the material returning base plate and the mandrel fixing structure are arranged along the axial direction of the mandrel, the two material returning clamping plates are arranged on the material returning base plate, the material returning base plate is provided with an avoiding hole for the mandrel and the preform to pass through along the axial direction of the mandrel, the two material returning clamping plates are symmetrically arranged on both sides of the mandrel along the axial direction of the mandrel, one end of the material returning clamping plate is rotationally connected with the material returning base plate, and the other end of the material returning clamping plate is used for abutting against the mouth of the preform.

[0009] By adopting the above technical scheme, the mandrel fixing structure first drives the mandrel and the preform to pass through the avoiding hole, so that the preform completely passes through the avoiding hole to the position where the material returning clamping plate abuts against the mouth of the preform, and then the mandrel fixing structure drives the mandrel to slide away from the material returning structure to separate the preform and the mandrel, which is more convenient and causes less damage to the preform.

[0010] Preferably, the material returning base plate is provided with a material returning shaft and two material returning bearing seats, the material returning bearing seats and the material returning clamping plates are in one-to-one correspondence, the two ends of the material returning shaft are rotationally connected with the two material returning bearing seats respectively, the material returning shaft is sleeved with an elastic reset member, one end of the material returning clamping plate is connected with the material returning bearing seat, and the other end of the material returning clamping plate is used for abutting against the mouth of the preform.

[0011] By adopting the above technical scheme, when the preform enters the material returning structure and contacts the material returning clamping plate, the extrusion force is transmitted to the material returning clamping plate, the material returning clamping plate is forced to twist the material returning bearing seat, and at this time, the preform is ensured to pass through the material returning structure smoothly; after the preform completely passes through, the material returning clamping plate is not subjected to the extrusion force, and the elastic reset member drives the material returning bearing seat and the material returning clamping plate to return to the initial state; at this time, the mandrel drives the preform to return, when the mouth of the preform contacts the material returning clamping plate, a height difference is formed, the mandrel continues to return, the material returning clamping plate blocks the preform from moving to the left, and when the mandrel completely exits the material returning device, the mandrel and the preform are automatically separated, thereby achieving the effect of automatic material returning of the preform.

[0012] Preferably, the two material returning bearing seats and the material returning base plate are detachably connected.

[0013] By adopting the above technical scheme, if different preforms with different outer diameters need to be replaced or the material returning structure needs to be replaced due to damage, the material returning structure can be disassembled by directly disassembling the two material returning bearing seats, without the need to disassemble the material returning base plate together, so that the operation is convenient and the interchangeability is strong.

[0014] Preferably, the mutually approaching ends of the two material returning clamping plates are provided with abutting arc plates, one end of the abutting arc plate is connected with the material returning clamping plate, the other end of the abutting arc plate is used for abutting against the mouth of the preform, and the outer arc surfaces of the two abutting arc plates are oppositely arranged.

[0015] By adopting the technical scheme, the contact area between the material return card and the bottle mouth of the bottle blank can be increased, local stress concentration can be reduced, and the bottle blank can be prevented from being damaged during the material return process.

[0016] Preferably, the material return conveying belt is arranged on the side of the material return structure away from the mandrel fixing structure, and is used for receiving the bottle blank separated from the mandrel.

[0017] By adopting the technical scheme, the bottle blank is received by the material return conveying belt after being separated from the mandrel, and the bottle blank is transported out of the material return conveying belt, which is more convenient.

[0018] Preferably, a plurality of bottle blank clamping assemblies are arranged on the material return conveying belt, and the bottle blank clamping assemblies are fixedly connected to the material return conveying belt. The bottle blank clamping assemblies are arranged at equal intervals along the length direction of the material return conveying belt, and are used for receiving and clamping the bottle blank separated from the mandrel.

[0019] By adopting the technical scheme, the bottle blank clamping assembly enables the bottle blank to slide out of the material return conveying belt in an orderly manner, and improves the stability of the bottle blank during the material return conveying process.

[0020] Preferably, the bottle blank clamping assembly comprises a clamping seat and a clamping piece. A clamping groove is arranged in the clamping seat and penetrates the clamping seat in the axial direction of the mandrel. Two clamping pieces are arranged on the clamping seat and are connected to the opposite groove walls of the clamping groove. Clamping springs are arranged on the mutually faraway side walls of the two clamping pieces. One end of the clamping spring is connected to the clamping piece, and the other end of the clamping spring is connected to the groove wall of the clamping groove.

[0021] By adopting the technical scheme, a stable clamping structure is formed between the clamping piece and the groove wall of the clamping groove, and the clamping spring can provide a stable clamping force, thereby further improving the stability and safety of the bottle blank during the conveying process.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] 1. During the process of sliding the mandrel fixing structure close to the material return structure, the mandrel and the bottle blank sleeved on the mandrel are pushed through the material return structure together, and then the mandrel fixing structure drives the mandrel to slide away from the material return structure, so that the mandrel and the bottle blank are separated. The probability of the inner surface of the bottle blank being damaged during the material return process of the bottle blank is reduced, and the quality of the inner surface of the high-end gas cylinder is improved.

[0024] 2. Automatic material return according to the actual size of the bottle blank is realized under the condition of no power supply. The external material return structure reduces the replacement time, has strong interchangeability, and reduces power consumption.

[0025] 3. If the bottle blank of different outer diameter specification needs to be replaced or the damaged material return structure needs to be replaced, the material return structure can be disassembled by directly disassembling two material return bearing seats, without the need to disassemble the material return bottom plate together, which is convenient to operate and has strong interchangeability. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a sectional view of the overall structure of the present application;

[0027] Figure 2 is a sectional view of the bottle blank in the material return structure state;

[0028] Figure 3 is a sectional view of the bottle blank in the material return structure state;

[0029] Figure 4 is a sectional view of the bottle blank in the material return structure state;

[0030] Figure 5 is a sectional view of the bottle blank in the material return structure state;

[0031] Figure 6 is a sectional view of the bottle blank in the material return structure state;

[0032] BRIEF DESCRIPTION OF DRAWINGS: 110, core rod fixing structure; 111, bottle blank; 112, core rod; 120, material return structure; 121, material return bottom plate; 122, material return clamping plate; 123, fixed beam; 124, avoiding hole; 125, bottom plate bolt; 126, material return shaft; 127, material return bearing seat; 128, elastic reset member; 129, abutting arc plate; 130, material return conveying belt; 131, bottle blank clamping assembly; 1311, clamping seat; 1312, clamping piece; 132, clamping groove; 133, clamping spring; 140, bearing bolt. DETAILED DESCRIPTION

[0033] The present application will be further described in detail below with reference to the accompanying drawings.

[0034] The present application discloses a high-pressure gas cylinder automatic material return device, which is used for reducing the probability of the inner surface of the bottle blank being damaged by being pushed during the bottle blank material return process and improving the inner surface quality of the high-end gas cylinder.

[0035] REFERENCE Figure 1 , Figure 2The utility model provides an automatic material returning device for high-pressure gas cylinder, which comprises a core rod fixing structure 110 and a material returning structure 120, the core rod fixing structure 110 and the material returning structure 120 are arranged axially along a core rod 112, the core rod fixing structure 110 is used for fixing one end of the core rod 112 to the core rod fixing structure 110, the core rod fixing structure 110 reciprocates axially along the core rod 112 to approach or move away from the material returning structure 120, the material returning structure 120 is used for the core rod 112 and a bottle blank 111 to pass through, and the material returning structure 120 is used for abutting against the bottle mouth of the bottle blank 111, the device can automatically return material under the condition of no power supply according to the actual size of the bottle blank 111, has the characteristics of simple structure and high reliability, and is especially suitable for cold spinning and stretch drawing processes of high-pressure gas cylinders.

[0036] Specifically, referring to Figures 2-5 The material returning structure 120 comprises a material returning bottom plate 121 and two material returning clamping plates 122, the material returning bottom plate 121 and the core rod fixing structure 110 are arranged axially along the core rod 112, in the embodiment, the side, away from the material returning clamping plate 122, of the material returning bottom plate 121 is provided with a fixed beam 123, the material returning bottom plate 121 is a cylindrical thin plate, the material returning bottom plate 121 is provided with an avoiding hole 124 for the core rod 112 and the bottle blank 111 to pass through axially along the core rod 112, the avoiding hole 124 penetrates through to the fixed beam 123, the material returning bottom plate 121 is connected with the fixed beam 123 through a plurality of bottom plate bolts 125, and the plurality of bottom plate bolts 125 are arranged at equal angles along the circumference of the core rod 112.

[0037] Further, the two material returning clamping plates 122 are arranged on the material returning bottom plate 121, the material returning bottom plate 121 is further provided with a material returning shaft 126 and two material returning bearing seats 127, the material returning bearing seats 127 correspond to the material returning clamping plates 122 one by one, the two material returning bearing seats 127 and the two material returning clamping plates 122 are symmetrically arranged on both sides of the core rod 112 axially along the core rod 112, one end of the material returning clamping plate 122 is connected with the material returning bearing seat 127, and the other end of the material returning clamping plate 122 is used for abutting against the bottle mouth of the bottle blank 111; the two ends of the material returning shaft 126 are rotatably connected with the two material returning bearing seats 127 respectively, an elastic reset member 128 is sleeved on the material returning shaft 126, the elastic reset member 128 can be a spiral spring or other types of elastic elements, and the elastic reset member 128 functions to rapidly restore the initial position of the material returning clamping plate 122 after the bottle blank 111 passes through, so as to facilitate the passing and material returning of the bottle blank 111 next time.

[0038] In addition, the mutually close ends of the two material returning clamping plates 122 are each provided with an abutting arc plate 129, one end of the abutting arc plate 129 is connected with the material returning clamping plate 122, and the other end of the abutting arc plate 129 is used for abutting against the bottle mouth of the bottle blank 111, and the outer arc surfaces of the two abutting arc plates 129 are oppositely arranged, which can increase the contact area of the material returning clamping plate 122 and the bottle mouth of the bottle blank 111, reduce local stress concentration, and prevent the bottle blank 111 from being damaged during the material returning process.

[0039] When the bottle blank 111 enters the material return structure and contacts the material return card plate 122, the extrusion force is transmitted to the material return card plate 122, and the material return card plate 122 is forced to twist the material return bearing seat 127, at this time, it is ensured that the bottle blank 111 passes through the material return structure smoothly; After the bottle blank 111 passes through completely, the material return card plate 122 will not be extruded, and the elastic restoring force of the elastic restoring member 128 drives the material return bearing seat 127 and the material return card plate 122 to restore to the initial state; At this time, the mandrel 112 drives the bottle blank 111 to return, when the bottle mouth of the bottle blank 111 contacts the material return card plate 122, a height difference is formed, the mandrel 112 continues to return, the material return card plate 122 blocks the bottle blank 111 from moving to the left, and when the mandrel 112 completely exits the material return device, the mandrel 112 and the bottle blank 111 are automatically separated, thereby playing a role of automatically returning the bottle blank 111, reducing the probability of the inner surface of the bottle blank 111 being damaged during the bottle blank 111 returning process, and improving the inner surface quality of the high-end gas cylinder.

[0040] Further, referring to Figure 2 , Figure 6 , the two material return bearing seats 127 and the material return bottom plate 121 are detachably connected, in the embodiment, the material return bearing seat 127 and the material return bottom plate 121 are detachably connected through bearing bolts 140, if different outer diameter specifications of the bottle blank 111 or damaged material return structure 120 need to be replaced, the two material return bearing seats 127 can be directly detached, so that the material return structure 120 can be detached, without the need to detach the material return bottom plate 121 together, which is convenient to operate and has strong interchangeability.

[0041] In addition, referring to Figure 1 , the material return conveying belt 130 is further included, the material return conveying belt 130 is arranged on the side of the material return structure 120 away from the mandrel fixing structure 110, and the material return conveying belt 130 is used for receiving the bottle blank 111 separated from the mandrel 112. The material return conveying belt 130 can be a belt conveyor or other types of conveying devices, which functions to convey the bottle blank 111 after material return to the next station, so as to avoid the accumulation of the bottle blank 111 in the material return area and affect the material return of the subsequent bottle blank 111.

[0042] Specifically, the return material conveying belt 130 is provided with a plurality of bottle blank clamping assemblies 131, the bottle blank clamping assemblies 131 are fixedly connected with the return material conveying belt 130, the plurality of bottle blank clamping assemblies 131 are arranged at equal intervals along the length direction of the return material conveying belt 130, the bottle blank clamping assembly 131 is used for receiving and clamping the bottle blank 111 separated from the mandrel 112, so that the bottle blank 111 is orderly slid out of the return material conveying belt 130, and the stability of the bottle blank 111 in the material conveying process is improved; the bottle blank clamping assembly 131 comprises a clamping seat 1311 and a clamping piece 1312, the clamping seat 1311 is provided with a clamping groove 132 penetrating through the clamping seat 1311 along the axial direction of the mandrel 112. The clamping seat 1311 is provided with two clamping pieces 1312, the two clamping pieces 1312 are respectively connected with the opposite side groove walls of the clamping groove 132, the mutually distal side walls of the two clamping pieces 1312 are provided with clamping springs 133, one end of the clamping spring 133 is connected with the clamping piece 1312, the other end of the clamping spring 133 is connected with the groove wall of the clamping groove 132, and the clamping spring 133 is used for always exerting a certain clamping force on the bottle blank 111, so that the bottle blank 111 is prevented from falling off in the conveying process.

[0043] The implementation principle of the high-pressure gas cylinder automatic return material device in the embodiment of the present application is as follows: when the bottle blank 111 enters the return material structure and contacts the return material clamping plate 122, the extrusion force is transmitted to the return material clamping plate 122, the return material clamping plate 122 is forced to twist the return material bearing seat 127, and at this time, the bottle blank 111 is ensured to smoothly pass through the return material structure; after the bottle blank 111 completely passes through, the return material clamping plate 122 will not be extruded, and the elastic restoring member 128 drives the return material bearing seat 127 and the return material clamping plate 122 to restore to the initial state; at this time, the mandrel 112 drives the bottle blank 111 to return, when the bottle mouth of the bottle blank 111 contacts the return material clamping plate 122, a height difference is formed, the mandrel 112 continues to return, the return material clamping plate 122 blocks the bottle blank 111 from moving to the left, and when the mandrel 112 completely exits the return material device, the mandrel 112 is automatically separated from the bottle blank 111, thereby playing a role of automatically returning the bottle blank 111, reducing the probability that the inner surface of the bottle blank 111 is damaged in the return material process of the bottle blank 111, and improving the inner surface quality of the high-end gas cylinder.

[0044] The embodiments of the specific embodiment are the preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An automatic unloading device for high-pressure gas cylinders, characterized in that: The device comprises a mandrel fixing structure (110) and a material returning structure (120), the mandrel fixing structure (110) and the material returning structure (120) are arranged axially apart along a mandrel (112), the mandrel fixing structure (110) is used to fix one end of the mandrel (112) on the mandrel fixing structure (110), the mandrel fixing structure (110) reciprocates axially along the mandrel (112) to approach or move away from the material returning structure (120), the material returning structure (120) is used for the bottle blank (111) and the mandrel (112) to pass through, and the material returning structure (120) is used to abut against the bottle mouth of the bottle blank (111).

2. The automatic material returning device for high-pressure gas cylinders according to claim 1, characterized in that: The material returning structure (120) comprises a material returning bottom plate (121) and two material returning clamping plates (122), the material returning bottom plate (121) and the mandrel fixing structure (110) are arranged axially apart along the mandrel (112), the two material returning clamping plates (122) are arranged on the material returning bottom plate (121), the material returning bottom plate (121) is provided with an avoiding hole (124) for the mandrel (112) and the bottle blank (111) to pass through along the axial direction of the mandrel (112), the two material returning clamping plates (122) are symmetrically arranged on both sides of the mandrel (112) along the axial direction of the mandrel (112), one end of the material returning clamping plate (122) is rotatably connected with the material returning bottom plate (121), and the other end of the material returning clamping plate (122) is used to abut against the bottle mouth of the bottle blank (111).

3. The automatic material returning device for high-pressure gas cylinders according to claim 2, characterized in that: The material returning bottom plate (121) is provided with a material returning shaft (126) and two material returning bearing seats (127), the material returning bearing seats (127) and the material returning clamping plates (122) are in one-to-one correspondence, the two ends of the material returning shaft (126) are rotatably connected with the two material returning bearing seats (127) respectively, the material returning shaft (126) is sleeved with an elastic reset member (128), one end of the material returning clamping plate (122) is connected with the material returning bearing seat (127), and the other end of the material returning clamping plate (122) is used to abut against the bottle mouth of the bottle blank (111).

4. The automatic material returning device for high-pressure gas cylinders according to claim 3, characterized in that: The two material returning bearing seats (127) and the material returning bottom plate (121) are detachably connected.

5. The automatic material returning device for high-pressure gas cylinders according to claim 2, characterized in that: The mutually approaching ends of the two material returning clamping plates (122) are provided with abutting arc plates (129), one end of the abutting arc plate (129) is connected with the material returning clamping plate (122), the other end of the abutting arc plate (129) is used to abut against the bottle mouth of the bottle blank (111), and the outer arc surfaces of the two abutting arc plates (129) are oppositely arranged.

6. The automatic material returning device for high-pressure gas cylinders according to claim 1, characterized in that: The device further comprises a material returning conveying belt (130), the material returning conveying belt (130) is arranged on the side of the material returning structure (120) away from the mandrel fixing structure (110), and the material returning conveying belt (130) is used to receive the bottle blank (111) separated from the mandrel (112).

7. The automatic material returning device for high-pressure gas cylinders according to claim 6, characterized in that: The return material conveying belt (130) is provided with a plurality of bottle preform clamping assemblies (131), the bottle preform clamping assemblies (131) are fixedly connected with the return material conveying belt (130), a plurality of the bottle preform clamping assemblies (131) are arranged at equal intervals along the length direction of the return material conveying belt (130), and the bottle preform (111) clamping piece is used for receiving and clamping the bottle preform (111) separated from the mandrel (112).

8. The automatic material returning device for high-pressure gas cylinders according to claim 7, characterized in that: The bottle preform clamping assembly (131) comprises a clamping seat (1311) and a clamping piece (1312), the clamping seat (1311) is provided with a clamping groove (132), the clamping groove (132) penetrates the clamping seat (1311) in the axial direction of the mandrel (112), the clamping seat (1311) is provided with two clamping pieces (1312), the two clamping pieces (1312) are respectively connected with the opposite side groove walls of the clamping groove (132), the mutually faraway side walls of the two clamping pieces (1312) are provided with clamping springs (133), one end of the clamping spring (133) is connected with the clamping piece (1312), and the other end of the clamping spring (133) is connected with the groove wall of the clamping groove (132).

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