Automatic screwing and sealing device for seamless gas cylinder opening

Abstract

The utility model discloses an automatic screwing and sealing device for a seamless gas cylinder opening. The automatic screwing and sealing device comprises a rack, a movable frame body connected with a lifting mechanism and a screwing and sealing mechanism located in the movable frame body. The movable frame body is arranged on a machine frame guide column in a sliding fit mode, a screwing and sealing mechanism right facing a seamless gas cylinder opening is arranged in the movable frame body, and a rotary sealing sleeve in the screwing and sealing mechanism is arranged at the bottom of the movable frame body in a protruding mode. And the lifting mechanism and the screwing and sealing mechanism driven by the control device enable the rotary sealing sleeve to be quickly screwed and sealed in the opening of the seamless gas cylinder. The device has the advantages that the lifting mechanism and the screwing and sealing mechanism are automatically operated and organically combined, the opening of the seamless gas cylinder can be quickly and automatically screwed and sealed, and the device is simple in structure, high in automation degree, high in centering and positioning precision, good in sealing effect, labor-saving and safe to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of seamless gas cylinder detection, in particular to an automatic tightening and sealing device for a seamless gas cylinder mouth. Background Art

[0002] In order to ensure the safe use of seamless gas cylinders, in accordance with national requirements, seamless gas cylinders must be strictly inspected before use. The existing technology generally uses an external measurement method water pressure test device to detect the elastic deformation and plastic deformation of the bottle body. The external measurement method water pressure test device requires a large open space to place the seamless gas cylinder. The seamless gas cylinder is manually transported and the seamless gas cylinder mouth is aligned and connected with the rotating tightening device. The rotating tightening device and the seamless gas cylinder are then lifted by a lifting equipment and transferred together to the water jacket. The seamless gas cylinder is then manually sealed in the water jacket for testing. The above-mentioned single-bottle inspection work requires multiple operators to complete, resulting in the existing water pressure test device not only occupying a large space, but also being prone to shaking during the transfer of seamless gas cylinders. It not only poses a safety hazard to the operator, but also has the defect of low production efficiency. Therefore, people are eager to have an automatic tightening and sealing device that can automatically and quickly tighten and seal the seamless gas cylinder mouth instead of manual operation. Summary of the invention

[0003] The purpose of the utility model is to overcome the defects of the prior art and to provide an automatic tightening and sealing device for the mouth of a seamless gas cylinder, which can be quickly tightened and sealed under the drive of a control device and is connected to a lifting device as a whole, has a small footprint, is safe to operate, and has high production efficiency.

[0004] The technical solution to solve the above technical problems is: an automatic tightening and sealing device for the mouth of a seamless gas cylinder, comprising a frame supporting the seamless gas cylinder, and also comprising a movable frame body connected to a lifting mechanism and a tightening and sealing mechanism located in the movable frame body; the movable frame body is slidably mounted on the guide column of the frame, and a tightening and sealing mechanism facing the mouth of the seamless gas cylinder is arranged in the movable frame body, and a rotating sealing sleeve in the tightening and sealing mechanism is protruded and arranged at the bottom of the movable frame body, and the lifting mechanism and the tightening and sealing mechanism driven by the control device enable the rotating sealing sleeve to be quickly tightened and sealed in the mouth of the seamless gas cylinder.

[0005] The preferred solution is: the movable frame body is composed of an upper cross frame body, a middle cross frame body, and a lower cross frame body which are horizontally spaced from top to bottom and connected with a plurality of vertically spaced columns, the upper ends of the plurality of columns are connected to the bottom of the upper cross frame body, and the lower ends of the plurality of columns are connected to the top surface of the water jacket pressure cover; the left and right ends of the upper cross frame body are respectively connected with guide sleeves with the same structure and symmetrical positions, the guide sleeves are respectively slidably fitted on guide columns arranged at intervals, the guide columns are vertically fixed on the frame, and a hook connected to a lifting mechanism is provided on the top of the upper cross frame body.

[0006] The preferred solution is: the lifting mechanism includes a lifting frame, and the lifting frame is composed of a horizontal bending plate and a vertical bending plate bent at right angles; a part of the bottom surface of the horizontal bending plate is fixed to the top of the frame, and a guide wheel is installed on the top surface of the horizontal bending plate; a lifting cylinder is provided at the lower end of the vertical bending plate, and a guide moving wheel is installed at the end of the piston rod of the lifting cylinder, and one end of the wire rope is connected to the hook on the top of the moving frame body and then passes around the guide wheel and the guide moving wheel and is fixed to the other part of the bottom surface of the horizontal bending plate.

[0007] The preferred solution is that the tightening sealing mechanism includes a rotating mechanism and a sealing mechanism: the rotating mechanism includes: a motor arranged in a moving frame body, a driving gear connected to the output shaft of the motor and a driven gear meshing with the driving gear, the inner hole of the lower cross frame body at the lower part of the moving frame body is fixedly installed with a frame body copper sleeve, the inner hole of the water jacket pressure cover which is integrated with the lower cross frame body is sealed and fixedly installed with a water jacket pressure cover copper sleeve, the upper end face and the lower end face of the driven gear are respectively hingedly supported between the frame body copper sleeve and the water jacket pressure cover copper sleeve; the inner hole of the frame body copper sleeve and the inner hole of the driven gear are hingedly connected to the upper outer diameter of the rotating sealing sleeve, the middle outer diameter of the rotating sealing sleeve is sealed and hingedly connected to the inner hole of the water jacket pressure cover copper sleeve, the middle outer diameter of the rotating sealing sleeve is larger than its upper and lower outer diameters to form a stepped shaft, and the rotating seal The upper side surface of the stepped shaft in the middle of the sleeve is sealed and inserted into the stepped hole at the bottom of the driven gear, and the lower side surface of the stepped shaft in the middle of the rotating sealing sleeve is located in the same plane as the bottom surface of the water jacket pressure cover; the outer diameter of the lower part of the rotating sealing sleeve protruding from the bottom of the water jacket pressure cover is provided with a thread that is screwed into the mouth of the seamless gas cylinder; the first fastener fastens the driven gear to the upper side surface of the stepped shaft of the rotating sealing sleeve; the sealing mechanism includes: a sealing cylinder arranged in the moving frame body and a core shaft connected to the piston rod of the sealing cylinder, the core shaft is slidably fitted in the inner hole of the rotating sealing sleeve and its length is greater than the rotating sealing sleeve, a sealing rubber ring and a gasket are mounted on the outer diameter of the core shaft protruding from the lower end surface of the rotating sealing sleeve, a nut is installed at the end of the core shaft below the gasket, and the core shaft and the nut both have a central through hole.

[0008] The preferred solution is that the tightening sealing mechanism includes a rotating mechanism and a sealing mechanism: the rotating mechanism includes: a motor arranged in a moving frame body, a driving gear connected to the motor output shaft and a driven gear meshing with the driving gear 14, the inner hole of the lower cross frame body at the lower part of the moving frame body is fixed with a frame body copper sleeve, the inner hole of the water jacket gland that is integrated with the lower cross frame body is sealed and fixed with a water jacket gland copper sleeve, the upper end face and the lower end face of the driven gear are respectively hingedly supported between the frame body copper sleeve and the water jacket gland copper sleeve; the upper end face of the rotating connecting ring is inserted into the stepped hole at the bottom of the driven gear, and the lower end face of the rotating connecting ring is attached to the upper side face of the stepped shaft protruding from the outer diameter of the rotating sealing sleeve, and the lower side face of the stepped shaft protruding from the outer diameter of the rotating sealing sleeve is in the same plane as the bottom face of the water jacket gland; the upper end face and The lower end surface is connected to the driven gear and the rotating sealing sleeve by the second fastener and the third fastener respectively, and the outer diameter of the rotating connecting ring is seal-hinged in the inner hole of the water jacket pressure cover copper sleeve; the inner hole of the frame body copper sleeve, the inner hole of the driven gear 15 and the inner hole of the rotating connecting ring are seal-hinged with the upper outer diameter of the rotating sealing sleeve, and the outer diameter of the lower part of the rotating sealing sleeve protruding from the bottom of the water jacket pressure cover is provided with a thread that is screwed into the mouth of the seamless gas cylinder; the sealing mechanism comprises: a sealing cylinder arranged in the mobile frame body and a mandrel connected to the piston rod of the sealing cylinder, the mandrel is slidably fitted in the inner hole of the rotating sealing sleeve and its length is greater than the rotating sealing sleeve, a sealing rubber ring and a gasket are mounted on the outer diameter of the mandrel protruding from the lower end surface of the rotating sealing sleeve, a nut is provided at the end of the mandrel under the gasket, and the mandrel and the nut both have a central through hole.

[0009] The preferred solution is that an upper copper sleeve and a lower copper sleeve are respectively inlaid at the upper end and the lower end of the inner hole of the rotary sealing sleeve, and the upper copper sleeve and the lower copper sleeve are both slidably matched with the core shaft.

[0010] The preferred solution is that the inner hole and outer diameter of the water jacket gland copper sleeve and the inner hole of the rotating connecting ring are all provided with sealing rings; the upper side surface of the stepped shaft in the middle of the rotating sealing sleeve and the stepped hole at the bottom of the driven gear are provided with a first sealing ring and a second sealing ring.

[0011] The beneficial effects of the utility model are as follows: the utility model is widely used in seamless gas cylinders such as oxygen cylinders, nitrogen cylinders, hydrogen, natural gas and fire cylinders. The lifting mechanism of the utility model quickly delivers the tightening sealing mechanism to the mouth of the seamless gas cylinder, and the lifting mechanism and the tightening sealing mechanism are organically combined. The tightening sealing mechanism can quickly drive the rotating mechanism to rotate, so that the rotating sealing sleeve can be quickly rotated and tightened in the mouth of the seamless gas cylinder. At the same time, the tightening sealing mechanism quickly drives the sealing mechanism to move, and the sealing cylinder drives the core shaft to retract and extrude the sealing rubber ring, and the seamless gas cylinder mouth is quickly sealed with the sealing rubber ring that expands after extrusion. The utility model can realize the rapid and automatic rotation and tightening of the seamless gas cylinder mouth and the rapid and automatic sealing of the seamless gas cylinder mouth under the drive of the control device (not shown), with a high degree of automation, laying the foundation for the future external measurement method water pressure test detection device to achieve comprehensive automation operation. The utility model has a simple structure, a high degree of automation, high centering and positioning accuracy, labor saving, and safe operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the front view of the utility model, showing the positions of the lifting mechanism, the tightening and sealing mechanism and the mouth of the seamless gas cylinder;

[0013] Figure 2 yes Figure 1 A partial enlarged view of the middle screw-tightening sealing mechanism;

[0014] Figure 3 yes Figure 2 Middle AA view, showing the structure of the mobile frame;

[0015] FIG4A is Figure 3 The enlarged view of the middle D part shows the first type of tightening seal mechanism structure, in which the driven gear in the rotating mechanism drives the rotating seal sleeve to rotate through the first fastener;

[0016] FIG4B is Figure 3 The enlarged view of the middle D part shows the second tightening sealing mechanism structure, in which the driven gear in the rotating mechanism drives the rotating sealing sleeve to rotate through the rotating connecting ring and the second fastener and the third fastener.

[0017] Description of the serial numbers in the attached drawings:

[0018] 1: seamless gas cylinder; 1a: bottle mouth; 2: lifting mechanism; 3: tightening sealing mechanism; 4: lifting frame; 4a: horizontal bending plate; 4b: vertical bending plate; 5: guide wheel; 6: guide moving wheel; 7: lifting cylinder; 8: wire rope; 9: moving frame body; 9a: upper cross frame body; 9b: middle cross frame body; 9c: lower cross frame body; 9d: column body; 9e: frame body copper sleeve; 10: guide sleeve; 11: first fastener; 12: rotating connecting ring; 13: motor; 14: driving gear; 15: driven gear; 16: sealing cylinder; 17: mandrel; 18: rotating sealing sleeve; 18a: upper copper sleeve; 18b: lower copper sleeve; 19: sealing rubber ring; 20: water jacket gland; 20a: water jacket gland copper sleeve; 21: support plate; 22: water jacket; 23a: second fastener; 23b: third fastener; 24: sealing ring; 24a: first sealing ring; 24b: second sealing ring; 25: washer; 26: nut; 27: hook; 100: frame; 100a: guide column. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments.

[0020] like Figure 1 , Figure 2 As shown, the utility model discloses an automatic tightening and sealing device for the mouth of a seamless gas cylinder, comprising a frame 100 supporting a seamless gas cylinder 1, and also comprising a movable frame body 9 connected to a lifting mechanism 2 and a tightening and sealing mechanism 3 located in the movable frame body 9; the movable frame body 9 is slidably mounted on a guide column 100a of the frame 100, and a tightening and sealing mechanism 3 facing the mouth of the seamless gas cylinder 1a is arranged in the movable frame body 9, and a rotating sealing sleeve 18 in the tightening and sealing mechanism 3 is protrudingly arranged at the bottom of the movable frame body 9, and the lifting mechanism 2 and the tightening and sealing mechanism 3 driven by a control device (not shown) enable the rotating sealing sleeve 18 to be quickly tightened and sealed in the mouth of the seamless gas cylinder 1a.

[0021] like Figure 2 As shown, the movable frame body 9 is composed of an upper cross frame body 9a, a middle cross frame body 9b, and a lower cross frame body 9c which are horizontally spaced from top to bottom and connected with a plurality of vertically spaced columns 9d, the upper ends of the plurality of columns 9d are connected to the bottom of the upper cross frame body 9a, and the lower ends of the plurality of columns 9d are connected to the top surface of the water jacket pressure cover 20; the left and right ends of the upper cross frame body 9a are respectively connected with guide sleeves 10 with the same structure and symmetrical positions, the guide sleeves 10 are respectively slidably fitted on guide columns 100a which are spaced apart, and the guide columns 100a are vertically fixed on the frame 100, and a hook 27 connected to the lifting mechanism 2 is provided in the middle of the top of the upper cross frame body 9a.

[0022] like Figure 1As shown, the lifting mechanism 2 includes a lifting frame 4, and the lifting frame 4 is composed of a horizontal bending plate 4a and a vertical bending plate 4b bent at right angles; a part of the bottom surface of the horizontal bending plate 4a is fixed to the top of the frame 100, and a guide wheel 5 is installed on the top surface of the horizontal bending plate 4a; a lifting cylinder 7 is provided at the lower end of the vertical bending plate 4b, and a guide moving wheel 6 is installed at the end of the piston rod of the lifting cylinder 7, and one end of the wire rope 8 is connected to the top hook 27 of the moving frame body 9 and then passes around the two guide wheels 5 and the guide moving wheel 6 and is fixed to another part of the bottom surface of the horizontal bending plate 4a.

[0023] like Figure 3 4A shows the structure of the first tightening sealing mechanism, wherein the tightening sealing mechanism 3 includes a rotating mechanism and a sealing mechanism:

[0024] The rotating mechanism includes: a motor 13 arranged in a moving frame body 9, a driving gear 14 connected to the output shaft of the motor 13 and a driven gear 15 meshing with the driving gear 14, the inner hole of the lower cross frame body 9c at the lower part of the moving frame body 9 is fixedly installed with a frame body copper sleeve 9e, the inner hole of the water jacket gland 20 which is integrated with the lower cross frame body 9c is sealed and fixedly installed with a water jacket gland copper sleeve 20a through a sealing ring 24 and a fastener, the upper end face and the lower end face of the driven gear 15 are respectively hingedly supported between the frame body copper sleeve 9e and the water jacket gland copper sleeve 20a; the inner hole of the frame body copper sleeve 9e and the inner hole of the driven gear 15 are hingedly connected to the upper outer diameter of the rotating sealing sleeve 18, and the rotating sealing sleeve 18 The middle outer diameter is sealed by a sealing ring 24 to the inner hole of the hinged water jacket gland copper sleeve 20a. The middle outer diameter of the rotary sealing sleeve 18 is larger than its upper and lower outer diameters to form a stepped shaft. The upper side of the middle stepped shaft of the rotary sealing sleeve 18 is sealed and inserted into the bottom stepped hole of the driven gear 15 through the first sealing ring 24a and the second sealing ring 24b. The lower side of the middle stepped shaft of the rotary sealing sleeve 18 is located in the same plane as the bottom surface of the water jacket gland 20. The outer diameter of the lower part of the rotary sealing sleeve 18 protruding from the bottom of the water jacket gland 20 is provided with a thread that is screwed into the bottle mouth 1a of the seamless gas cylinder 1. The first fastener 11 is fastened to the driven gear 15 on the upper side of the stepped shaft of the rotary sealing sleeve 18.

[0025] The sealing mechanism includes: a sealing cylinder 16 arranged in the movable frame body 9 and a core shaft 17 connected to the piston rod of the sealing cylinder 16, the core shaft 17 is slidably fitted in the inner hole of the rotating sealing sleeve 18 and its length is greater than the rotating sealing sleeve 18, a sealing rubber ring 19 and a gasket 25 are mounted on the outer diameter of the core shaft 17 protruding from the lower end surface of the rotating sealing sleeve 18, a nut 26 is installed at the end of the core shaft 17 below the gasket 25, and the core shaft 17 and the nut 26 both have a central through hole.

[0026] like Figure 34B shows the structure of the second tightening sealing mechanism, wherein the tightening sealing mechanism 3 includes a rotating mechanism and a sealing mechanism:

[0027] The rotating mechanism includes: a motor 13 arranged in a moving frame body 9, a driving gear 14 connected to the output shaft of the motor 13 and a driven gear 15 meshing with the driving gear 14, the inner hole of the lower cross frame body 9c at the lower part of the moving frame body 9 is fixed with a frame body copper sleeve 9e, the inner hole of the water jacket gland 20 which is integrated with the lower cross frame body 9c is sealed and fixed with a water jacket gland copper sleeve 20a through a sealing ring 24 and a fastener, the upper end face and the lower end face of the driven gear 15 are respectively hinged and supported between the frame body copper sleeve 9e and the water jacket gland copper sleeve 20a; the upper end face of the rotating connecting ring 12 is inserted into the stepped hole at the bottom of the driven gear 15, and the lower end face of the rotating connecting ring 12 is attached to the upper side of the stepped shaft protruding from the outer diameter of the rotating sealing sleeve 18, and the rotating sealing sleeve 18 is provided with a plurality of rotating connecting rings. The lower side of the stepped shaft protruding from the outer diameter of the sealing sleeve 18 is located in the same plane as the bottom surface of the water jacket gland 20; the upper end surface and the lower end surface of the rotating connecting ring 12 are connected to the driven gear 15 and the rotating sealing sleeve 18 by the second fastener 23a and the third fastener 23b respectively, and the outer diameter of the rotating connecting ring 12 is sealed and hinged in the inner hole of the water jacket gland copper sleeve 20a through a sealing ring 24; the inner hole of the frame body copper sleeve 9e, the inner hole of the driven gear 15 and the inner hole of the rotating connecting ring 12 are hinged to the upper outer diameter of the rotating sealing sleeve 18, wherein a sealing ring 24 is provided between the inner hole of the rotating connecting ring 12 and the outer diameter of the rotating sealing sleeve 18, and the outer diameter of the lower part of the rotating sealing sleeve 18 protruding from the bottom of the water jacket gland 20 is provided with a thread that is screwed into the bottle mouth 1a of the seamless gas cylinder 1;

[0028] The sealing mechanism includes: a sealing cylinder 16 arranged in the movable frame body 9 and a core shaft 17 connected to the piston rod of the sealing cylinder 16, the core shaft 17 is slidably fitted in the inner hole of the rotating sealing sleeve 18 and its length is greater than the rotating sealing sleeve 18, a sealing rubber ring 19 and a gasket 25 are mounted on the outer diameter of the core shaft 17 protruding from the lower end surface of the rotating sealing sleeve 18, a nut 26 is installed at the end of the core shaft 17 below the gasket 25, and the core shaft 17 and the nut 26 both have a central through hole.

[0029] An upper copper sleeve 18 a and a lower copper sleeve 18 b are respectively inlaid at the upper end and the lower end of the inner hole of the rotary sealing sleeve 18 , and both the upper copper sleeve 18 a and the lower copper sleeve 18 b are slidably matched with the core shaft 17 .

[0030] The inner hole and outer diameter of the water jacket gland copper sleeve 20a and the inner hole of the rotating connecting ring 12 are provided with sealing rings 24 for sealing; the first sealing ring 24a and the second sealing ring 24b are provided on the upper side of the stepped shaft in the middle of the rotating sealing sleeve 18 and in the stepped hole at the bottom of the driven gear 15.

[0031] The working process of the utility model is described as follows:

[0032] 1. First, under the drive of the control device (not shown), the cylinder rod of the lifting cylinder 7 in the lifting mechanism 2 is lifted, driving the moving frame body 9 to drive the rotary sealing mechanism 3 to descend, and at the same time, the motor 13 drives the driving gear 14 and the driven gear 15 to rotate, driving the rotary sealing sleeve 18 to rotate clockwise and connect with the bottle mouth 1a of the seamless gas cylinder 1 through threaded connection to form an integral combination;

[0033] 2. The control device (not shown) instructs the cylinder rod of the sealing cylinder 16 to drive the core shaft 17 to lift, and the nut 26 is lifted. The end surface of the nut 26 moves up to squeeze the gasket 25 and the sealing rubber ring 19 to the end surface of the rotating sealing sleeve 18, so that the sealing rubber ring 19 is squeezed and deformed. After the squeezing and deformation, the sealing rubber ring 19 forms a tight seal on the threaded hole of the bottle mouth 1a of the seamless gas cylinder 1, providing protection for the water pressure test of the seamless gas cylinder;

[0034] 3. Reset: After the pressure test on the seamless gas cylinder 1, the control device (not shown) instructs the cylinder rod of the sealing cylinder 16 to reset so that the sealing rubber ring 19 returns to its original state, and the cylinder rod of the lifting cylinder 7 in the lifting mechanism 2 descends so that the movable frame body 9 drives the rotating sealing mechanism 3 to lift. At the same time, the motor 13 drives the driving gear 14 and the driven gear 15 to rotate counterclockwise, and the rotating sealing sleeve 18 is separated from the bottle mouth 1a of the seamless gas cylinder 1.

[0035] Serial numbers not specified in the document: Serial number 21 is a support plate, which is arranged at the bottom of the frame 100 and is used to support the seamless gas cylinder 1; Serial number 22 is a water jacket arranged at the bottom of the frame 100 and is used to perform water pressure testing on the seamless gas cylinder 1.

Claims

1. An automatic tightening and sealing device for a seamless gas cylinder mouth, comprising a frame (100) supporting a seamless gas cylinder (1), characterized in that: It also includes a mobile frame body (9) connected to the lifting mechanism (2) and a tightening and sealing mechanism (3) located in the mobile frame body (9); the mobile frame body (9) is slidably mounted on a guide column (100a) of a frame (100); a tightening and sealing mechanism (3) facing the seamless gas cylinder mouth (1a) is arranged in the mobile frame body (9); a rotating sealing sleeve (18) in the tightening and sealing mechanism (3) is protrudingly arranged at the bottom of the mobile frame body (9); and the lifting mechanism (2) and the tightening and sealing mechanism (3) driven by the control device enable the rotating sealing sleeve (18) to be quickly tightened and sealed in the seamless gas cylinder mouth (1a).

2. The automatic tightening and sealing device for the mouth of a seamless gas cylinder according to claim 1, characterized in that: The movable frame body (9) is composed of an upper cross frame body (9a), a middle cross frame body (9b), and a lower cross frame body (9c) which are horizontally spaced from top to bottom and connected to a plurality of vertically spaced columns (9d); the upper ends of the plurality of columns (9d) are connected to the bottom of the upper cross frame body (9a), and the lower ends of the plurality of columns (9d) are connected to the top surface of the water jacket gland (20); the left and right ends of the upper cross frame body (9a) are respectively connected to guide sleeves (10) with the same structure and symmetrical positions; the guide sleeves (10) are respectively slidably fitted on guide columns (100a) arranged at intervals; the guide columns (100a) are vertically fixed on the frame (100); and a hook (27) connected to a lifting mechanism (2) is provided at the top of the upper cross frame body (9a).

3. An automatic tightening and sealing device for a seamless gas cylinder mouth according to claim 1 or 2, characterized in that: The lifting mechanism (2) comprises a lifting frame (4), and the lifting frame (4) is composed of a horizontal bending plate (4a) and a vertical bending plate (4b) bent at right angles; a portion of the bottom surface of the horizontal bending plate (4a) is fixed to the top of the frame (100), and a guide wheel (5) is installed on the top surface of the horizontal bending plate (4a); a lifting cylinder (7) is provided at the lower end of the vertical bending plate (4b), and a guide moving wheel (6) is installed at the end of the piston rod of the lifting cylinder (7); one end of the wire rope (8) is connected to the top hook (27) of the movable frame body (9), and then passes around the guide wheel (5) and the guide moving wheel (6) and is fixed to the other portion of the bottom surface of the horizontal bending plate (4a).

4. The automatic tightening and sealing device for the seamless gas cylinder mouth according to claim 1, characterized in that: The tightening and sealing mechanism (3) comprises a rotating mechanism and a sealing mechanism: The rotating mechanism comprises: a motor (13) disposed in a movable frame body (9), a driving gear (14) connected to an output shaft of the motor (13), and a driven gear (15) meshing with the driving gear (14). The inner hole of the lower cross frame (9c) at the lower part of the movable frame (9) is fixedly installed with a frame copper sleeve (9e), and the inner hole of the water jacket gland (20) which is integral with the lower cross frame (9c) is sealed and fixedly installed with a water jacket gland copper sleeve (20a); the upper end surface and the lower end surface of the driven gear (15) are respectively hingedly supported between the frame copper sleeve (9e) and the water jacket gland copper sleeve (20a); the inner hole of the frame copper sleeve (9e) and the inner hole of the driven gear (15) are hingedly connected to the upper outer diameter of the rotating sealing sleeve (18), and the middle outer diameter of the rotating sealing sleeve (18) is sealed and hingedly connected to the inner hole of the water jacket gland copper sleeve (20a). The outer diameter of the middle portion of the rotary sealing sleeve (18) is larger than the outer diameters of the upper and lower portions thereof to form a stepped shaft; the upper side of the stepped shaft in the middle portion of the rotary sealing sleeve (18) is sealingly inserted into the stepped hole at the bottom of the driven gear (15); the lower side of the stepped shaft in the middle portion of the rotary sealing sleeve (18) and the bottom surface of the water jacket gland (20) are located in the same plane; the outer diameter of the lower portion of the rotary sealing sleeve (18) protruding from the bottom of the water jacket gland (20) is provided with a thread that is screwed into the bottle mouth (1a) of the seamless gas cylinder (1); the first fastener (11) fastens the driven gear (15) to the upper side of the stepped shaft of the rotary sealing sleeve (18); The sealing mechanism comprises: a sealing cylinder (16) arranged in a movable frame body (9) and a core shaft (17) connected to a piston rod of the sealing cylinder (16); the core shaft (17) is slidably fitted in an inner hole of the rotating sealing sleeve (18) and its length is greater than that of the rotating sealing sleeve (18); a sealing rubber ring (19) and a gasket (25) are sleeved on the outer diameter of the core shaft (17) protruding from the lower end surface of the rotating sealing sleeve (18); a nut (26) is installed at the end of the core shaft (17) below the gasket (25); and both the core shaft (17) and the nut (26) have a central through hole.

5. The automatic tightening and sealing device for the mouth of a seamless gas cylinder according to claim 1, characterized in that: The tightening and sealing mechanism (3) comprises a rotating mechanism and a sealing mechanism: The rotating mechanism comprises: a motor (13) disposed in a movable frame body (9), a driving gear (14) connected to an output shaft of the motor (13), and a driven gear (15) meshing with the driving gear (14). The inner hole of the lower cross frame (9c) at the lower part of the movable frame (9) is fixedly installed with a frame body copper sleeve (9e), and the inner hole of the water jacket pressure cover (20) which is integral with the lower cross frame (9c) is sealed and fixedly installed with a water jacket pressure cover copper sleeve (20a); the upper end face and the lower end face of the driven gear (15) are respectively hingedly supported between the frame body copper sleeve (9e) and the water jacket pressure cover copper sleeve (20a); the upper end face of the rotating connecting ring (12) is inserted into the stepped hole at the bottom of the driven gear (15), and the lower end face of the rotating connecting ring (12) is attached to the upper side face of the stepped shaft protruding from the outer diameter of the rotating sealing sleeve (18); the lower side face of the stepped shaft protruding from the outer diameter of the rotating sealing sleeve (18) is connected to the water jacket pressure cover (20) bottom surfaces are located in the same plane; the upper end surface and the lower end surface of the rotating connecting ring (12) are connected to the driven gear (15) and the rotating sealing sleeve (18) by the second fastener (23a) and the third fastener (23b) respectively, and the outer diameter of the rotating connecting ring (12) is sealed and hinged in the inner hole of the water jacket pressure cover copper sleeve (20a); the inner hole of the frame body copper sleeve (9e), the inner hole of the driven gear (15) and the inner hole of the rotating connecting ring (12) are sealed and hinged to the upper outer diameter of the rotating sealing sleeve (18), and the outer diameter of the lower part of the rotating sealing sleeve (18) protruding from the bottom of the water jacket pressure cover (20) is provided with a thread that is screwed into the bottle mouth (1a) of the seamless gas cylinder (1); The sealing mechanism comprises: a sealing cylinder (16) arranged in a movable frame body (9) and a core shaft (17) connected to a piston rod of the sealing cylinder (16); the core shaft (17) is slidably fitted in an inner hole of the rotating sealing sleeve (18) and its length is greater than that of the rotating sealing sleeve (18); a sealing rubber ring (19) and a gasket (25) are sleeved on the outer diameter of the core shaft (17) protruding from the lower end surface of the rotating sealing sleeve (18); a nut (26) is installed at the end of the core shaft (17) below the gasket (25); and both the core shaft (17) and the nut (26) have a central through hole.

6. The automatic tightening and sealing device for the seamless gas cylinder mouth according to claim 4 or 5, characterized in that: An upper copper sleeve (18a) and a lower copper sleeve (18b) are respectively inlaid at the upper end and the lower end of the inner hole of the rotary sealing sleeve (18), and the upper copper sleeve (18a) and the lower copper sleeve (18b) are both slidably matched with the core shaft (17).

7. An automatic tightening and sealing device for a seamless gas cylinder mouth according to claim 4 or 5, characterized in that: The inner hole and outer diameter of the water jacket gland copper sleeve (20a) and the inner hole of the rotary connection ring (12) are both provided with sealing rings (24); the upper side surface of the stepped shaft in the middle of the rotary sealing sleeve (18) and the stepped hole at the bottom of the driven gear (15) are provided with a first sealing ring (24a) and a second sealing ring (24b).

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