Chuck for gas cylinder inspection

Abstract

The utility model provides a chuck for gas cylinder inspection. The chuck comprises a rack, a locking sleeve, a cover plate, a sealing ring, a gas filling pipe and a driving mechanism. The locking sleeve can be screwed outside a bottle opening of the gas bottle, the cover plate is coaxially and rotatably arranged in the locking sleeve and can abut against the bottle opening of the gas bottle, and the sealing ring is used for achieving sealing between the cover plate and the bottle opening of the gas bottle. The upper end of the inflation pipe is in sliding connection with the rack in the vertical direction, the lower end of the inflation pipe can be located in a gas cylinder opening after penetrating through the cover plate, and the inflation pipe is used for inflating high-pressure gas into the gas cylinder. The driving mechanism is used for driving the inflation pipe to move vertically and further used for driving the locking sleeve to rotate. According to the utility model, through the driving of the driving mechanism, after the inflation tube moves downwards and the locking sleeve rotates, the locking sleeve is screwed on the opening of the gas cylinder, the sealing ring at the lower end of the cover plate abuts against the opening of the gas cylinder, so that the gas cylinder is sealed, then the inflation tube inflates the gas cylinder, the test is completed, the whole process is automatic, and the efficiency is improved.

Description

A chuck for gas cylinder inspection Technical Field

[0001] The utility model relates to the technical field of pressure testing devices, and particularly relates to a chuck for gas cylinder inspection. Background Art

[0002] After the production of fire extinguisher gas cylinders or before reloading, a pressure resistance test needs to be carried out. The pressure resistance test is usually divided into two types: a water pressure test and a gas pressure test. During the gas pressure test, after the gun head of the air gun is docked with the bottle mouth of the gas cylinder, high-pressure gas is filled. If there is no leakage, rupture, visible macroscopic deformation, etc. in the gas cylinder, it is considered qualified.

[0003] In the prior art, the air gun head is usually threadedly connected to the bottle mouth of the gas cylinder to achieve stable sealing. However, during batch testing, manually screwing the air gun head onto the bottle mouth of the gas cylinder has low efficiency. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the utility model provides a chuck for gas cylinder inspection, which can solve or at least alleviate one or more of the above problems and other problems existing in the prior art.

[0005] The utility model provides a chuck for gas cylinder inspection, including:

[0006] A frame;

[0007] A locking sleeve that can be screwed outside the bottle mouth of the gas cylinder;

[0008] A cover plate that rotates coaxially inside the locking sleeve and can abut against the bottle mouth of the gas cylinder;

[0009] A sealing ring coaxially connected to the lower end face of the cover plate for achieving sealing between the cover plate and the bottle mouth of the gas cylinder;

[0010] An inflation pipe, the upper end of which is slidably connected to the frame in the vertical direction, and the lower end passes through the cover plate and can be located inside the bottle mouth of the gas cylinder. The inflation pipe is used to fill high-pressure gas into the gas cylinder; and

[0011] A driving mechanism for driving the inflation pipe to move vertically, and the driving mechanism is also used to drive the locking sleeve to rotate.

[0012] Preferably, the driving mechanism includes:

[0013] A first driving sleeve sleeved outside the inflation pipe. The upper end of the first driving sleeve is connected to the frame, and the first driving sleeve is slidably connected to the inflation pipe in the vertical direction;

[0014] The second drive sleeve has its upper inner wall threadedly connected to the outer wall of the first drive sleeve. The second drive sleeve is sleeved outside the inflation tube and is rotatably connected to the inflation tube.

[0015] A power mechanism is used to drive the second drive sleeve to rotate.

[0016] Preferably, the drive mechanism further includes:

[0017] A connecting spring is provided, the upper end of which is connected to the frame, and the lower end of which is connected to the upper end of the first drive sleeve.

[0018] Preferably, a circumferential rack is provided on the inner wall of the second drive sleeve;

[0019] The power mechanism includes:

[0020] The motor is located inside the second drive sleeve, and the motor is fixedly connected to the air inflator.

[0021] The rotating shaft is coaxially and fixedly connected to the output end of the motor; and

[0022] A drive gear is fixedly connected coaxially to the rotating shaft, and the drive gear meshes with a rack on the inner wall of the second drive sleeve.

[0023] Preferably, the drive mechanism further includes:

[0024] The mating block is fixedly connected to the outer wall of the locking sleeve; and

[0025] The driving block has its upper end connected to the second driving sleeve and its lower end extended to the side of the mating block, and the side of the driving block can abut against the mating block.

[0026] Preferably, the drive mechanism further includes:

[0027] A support block, connected to the outer wall of the second drive sleeve, has a vertically oriented support hole thereon; and

[0028] The limiting ring is vertically slidably sleeved on the outside of the second drive sleeve, and can slide downwards to abut against the support block;

[0029] The upper end of the drive block slides through the support hole and is fixedly connected to the limiting ring; the lower end of the drive block has inclined contact surfaces on both sides; the contact surfaces can abut against the mating block.

[0030] Preferably, the drive mechanism further includes:

[0031] A mating ring is sleeved on the upper end of the second drive sleeve; and

[0032] A pressure spring is sleeved outside the second drive sleeve. The upper end of the pressure spring abuts against the mating ring, and the lower end of the pressure spring abuts against the limiting ring.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] In this invention, the inflation tube moves downwards under the drive of the drive mechanism, and the locking sleeve rotates and is screwed onto the mouth of the gas cylinder. The sealing ring at the lower end of the cover plate abuts against the mouth of the gas cylinder to seal the gas cylinder. Then, the inflation tube inflates the gas cylinder to complete the test. The whole process is automated, which improves efficiency. Attached Figure Description

[0035] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0036] Figure 1 is a perspective view of a clamp for gas cylinder inspection and its engagement with a gas cylinder according to an embodiment of the present invention.

[0037] Figure 2 is a 3D view of point A in Figure 1;

[0038] Figure 3 is a schematic diagram of the internal structure of Figure 2;

[0039] Figure 4 is an enlarged view of point B in Figure 3;

[0040] Figure 5 is an exploded view of Figure 2;

[0041] Figure 6 is an enlarged view of point C in Figure 5.

[0042] Figure label:

[0043] 10. Rack;

[0044] 20. Locking sleeve;

[0045] 30. Gas cylinders;

[0046] 40. Cover plate;

[0047] 50. Sealing ring;

[0048] 60. Inflation hose;

[0049] 70. Drive mechanism; 71. First drive sleeve; 72. Second drive sleeve; 73. Power mechanism; 731. Motor; 732. Rotating shaft; 733. Drive gear; 74. Connecting spring; 75. Mating block; 76. Drive block; 761. Contact surface; 77. Support block; 771. Support hole; 78. Limiting ring; 79. Mating ring; 80. Pressing spring. Detailed Implementation

[0050] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0051] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0052] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0053] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] Referring to Figures 1 to 6, this embodiment provides a clamp for inspecting gas cylinder 30, including a frame 10, a locking sleeve 20, a cover plate 40, a sealing ring 50, an inflation tube 60, and a drive mechanism 70.

[0057] Only a portion of the frame 10 is shown. The locking sleeve 20 can be screwed onto the outside of the gas cylinder 30's neck, and can also be detached from the neck of the gas cylinder 30. A cover plate 40 is coaxially rotatably disposed within the locking sleeve 20, and can abut against the neck of the gas cylinder 30. Specifically, the upper end of the cover plate 40 is fixedly connected to the inner ring of a bearing, and the outer ring of this bearing is fixedly connected to the inner wall of the locking sleeve 20. A sealing ring 50 is coaxially connected to the lower end face of the cover plate 40 to achieve a seal between the cover plate 40 and the neck of the gas cylinder 30. The upper end of the inflation tube 60 is vertically slidably connected to the frame 10, and the lower end of the inflation tube 60 passes through the cover plate 40 and can be located inside the neck of the gas cylinder 30. The inflation tube 60 is used to fill the gas cylinder 30 with high-pressure gas. A drive mechanism 70 is used to drive the inflation tube 60 to move vertically, and the drive mechanism 70 is also used to drive the locking sleeve 20 to rotate.

[0058] In this embodiment, driven by the drive mechanism 70, the inflation tube 60 moves down, and the locking sleeve 20 rotates and is screwed onto the mouth of the gas cylinder 30. The sealing ring 50 at the lower end of the cover plate 40 abuts against the mouth of the gas cylinder 30 to achieve a seal on the gas cylinder 30. Then, the inflation tube 60 inflates the gas cylinder 30 to complete the test. The whole process is automated, which improves efficiency.

[0059] In one embodiment, the drive mechanism 70 includes a first drive sleeve 71, a second drive sleeve 72, and a power mechanism 73.

[0060] The first drive sleeve 71 is sleeved outside the inflation tube 60, and its upper end is connected to the frame 10. The first drive sleeve 71 and the inflation tube 60 are slidably connected vertically. Specifically, a sliding sleeve is provided inside the first drive sleeve 71. The sliding sleeve is sleeved outside the inflation tube 60 and can slide vertically on the inflation tube 60. The sliding sleeve is fixedly connected to the inner wall of the first drive sleeve 71 through three connecting arms. Therefore, the first drive sleeve 71 can slide vertically on the inflation tube 60.

[0061] The upper inner wall of the second drive sleeve 72 is threadedly connected to the outer wall of the first drive sleeve 71. The second drive sleeve 72 is sleeved on the outside of the inflation tube 60 and is rotatably connected to the inflation tube 60. Specifically, a bearing is installed inside the second drive sleeve 72, which is sleeved on the inflation tube 60. Three connecting arms are connected to the outer wall of the bearing, and the other ends of the three connecting arms are fixedly connected to the inner wall of the second drive sleeve 72. Therefore, the second drive sleeve 72 can rotate on the inflation tube 60. The power mechanism 73 is used to drive the second drive sleeve 72 to rotate.

[0062] In this embodiment, driven by the driving sleeve, the second driving sleeve 72 rotates. The second driving sleeve 72 is threadedly connected to the first driving sleeve 71. The first driving sleeve 71 cannot rotate on the inflation tube 60. Therefore, the second driving sleeve 72 moves vertically relative to the first driving sleeve 71, thereby driving the inflation tube 60 to move vertically, which in turn drives the locking sleeve 20 and the cover plate 40 to move closer to or further away from the mouth of the gas cylinder 30.

[0063] In one embodiment, the drive mechanism 70 further includes a connecting spring 74, the upper end of which is connected to the frame 10, and the lower end of which is connected to the upper end of the first drive sleeve 71.

[0064] In this embodiment, after the second driving sleeve 72 moves downward relative to the first driving sleeve 71, when the locking sleeve 20 moves downward to the position of the gas cylinder 30 opening, the connecting sleeve causes the locking sleeve 20 to elastically abut against the gas cylinder 30 opening. Then, driven by the driving mechanism 70, the locking sleeve 20 rotates and is screwed onto the gas cylinder 30 opening. The connecting spring 74 prevents rigid contact when the locking sleeve 20 and the gas cylinder 30 opening just come into contact, thus avoiding damage to the threads of the locking sleeve 20 and the gas cylinder 30 opening, and also making the connection between the locking sleeve 20 and the gas cylinder 30 opening more stable.

[0065] In one embodiment, a circumferential rack is provided on the inner wall of the second drive sleeve 72. The power mechanism 73 includes a motor 731, a rotating shaft 732, and a drive gear 733.

[0066] The motor 731 is located inside the second drive sleeve 72 and is fixedly connected to the inflation pipe 60. The rotating shaft 732 is coaxially and fixedly connected to the output end of the motor 731. The drive gear 733 is coaxially and fixedly connected to the rotating shaft 732 and meshes with a rack on the inner wall of the second drive sleeve 72. Driven by the motor 731, the drive gear 733 drives the second drive sleeve 72 to rotate via the rack. Furthermore, a gear set can be provided between the motor 731 and the rack inside the second drive sleeve 72 to amplify the torque.

[0067] In one embodiment, the drive mechanism 70 further includes a mating block 75 and a drive block 76.

[0068] The mating block 75 is fixedly connected to the outer wall of the locking sleeve 20. The upper end of the driving block 76 is connected to the second driving sleeve 72, and the lower end of the driving block 76 can extend to the side of the mating block 75, and the side of the driving block 76 can abut against the mating block 75.

[0069] In this embodiment, driven by the motor 731, the second drive sleeve 72 rotates, causing the inflation tube 60, locking sleeve 20 and cover plate 40 to move downward. At the same time, the drive block 76 connected to the second drive sleeve 72 rotates with the second drive sleeve 72 and rotates after abutting against the mating block 75, thereby driving the locking sleeve 20 to rotate, so that the locking sleeve 20 can be screwed onto the mouth of the gas cylinder 30 or disengaged from the mouth of the gas cylinder 30.

[0070] In one embodiment, the drive mechanism 70 further includes a support block 77 and a limiting ring 78.

[0071] The support block 77 is connected to the outer wall of the second drive sleeve 72, and has a vertically oriented support hole 771. The limiting ring 78 is slidably fitted vertically onto the second drive sleeve 72, and can slide downwards to abut against the support block 77. The upper end of the drive block 76 slides through the support hole 771 and is fixedly connected to the limiting ring 78. The lower end of the drive block 76 has inclined contact surfaces 761 on both sides; the contact surfaces 761 can abut against the mating block 75. Specifically, the upper end of the drive block 76 slides vertically with the support hole 771, and the lower end of the drive block 76 is a triangular block.

[0072] In this embodiment, the rotation of the second drive sleeve 72 drives the drive block 76 to rotate. The drive block 76 presses against the mating block 75 by its own weight, thereby driving the locking sleeve 20 to rotate. If there is a problem with the mating position between the locking sleeve 20 and the gas cylinder 30, such as thread damage or slight misalignment of the gas cylinder 30 opening, preventing them from connecting and tightening, the drive block 76, due to the tilt of its contact surface 761, can retract upwards and backwards to avoid the mating block 75. This prevents a rigid collision between the drive block 76 and the mating block 75, which could increase the load on the motor 731 and cause damage. Then, the motor 731 reverses to loosen the locking sleeve 20, which can be manually adjusted and tightened again. Furthermore, when the locking sleeve 20 is screwed onto the mouth of the gas cylinder 30, the drive block 76 can continue to rotate. Each time the drive block 76 contacts the mating block 75, the locking sleeve 20 rotates slightly on the mouth of the gas cylinder 30, thereby increasing the seal between the sealing ring 50 at the cover plate 40 and the mouth of the gas cylinder 30. When loosening the locking sleeve 20, the drive block 76 can also be rotated in the opposite direction. The drive block 76 rotates multiple times and passes by the mating block 75, repeatedly striking the mating block 75, thereby gradually loosening the locking sleeve 20.

[0073] In one embodiment, the drive mechanism 70 further includes a mating ring 79 and a compression spring 80.

[0074] The mating ring 79 is sleeved on the upper end of the second drive sleeve 72. The pressure spring 80 is sleeved on the second drive sleeve 72, with the upper end of the pressure spring 80 abutting against the mating ring 79 and the lower end of the pressure spring 80 abutting against the limiting ring 78.

[0075] In this embodiment, the pressure spring 80 abuts against the limiting ring 78, thereby pressing down the driving block 76. In addition to relying on the gravity of the driving block 76 itself to abut against the mating block 75 to drive the mating block 75 to move, the pressure spring 80 enables the driving block 76 to stably push the mating block 75 to move.

[0076] In addition, an infrared transmitter can be installed on the locking sleeve 20, and a receiver can be installed on the frame 10. When the locking sleeve 20 is screwed onto the mouth of the gas cylinder 30 to a certain extent, the light emitted by the infrared transmitter passes through the receiver. The receiver converts the received light signal into an electrical signal and transmits it to the connected controller. The controller controls the motor 731 connected to it, and the motor 731 stops working. Until the test is completed, the controller controls the motor 731 to reverse, and the locking sleeve 20 gradually rotates and disengages from the mouth of the gas cylinder 30.

[0077] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A clamp for inspecting gas cylinders (30), characterized in that, include: Frame (10); locking sleeve (20), which can be screwed onto the outside of the gas cylinder (30) opening; A cover plate (40) is coaxially rotatably disposed inside the locking sleeve (20) and can abut against the mouth of the gas cylinder (30); a sealing ring (50) is coaxially connected to the lower end face of the cover plate (40) and is used to achieve a seal between the cover plate (40) and the mouth of the gas cylinder (30); an inflation tube (60) is vertically slidably connected to the frame (10) at its upper end and passes through the cover plate (40) and can be located inside the mouth of the gas cylinder (30), the inflation tube (60) is used to fill the gas cylinder (30) with high-pressure gas; and a driving mechanism (70) is used to drive the inflation tube (60) to move vertically, the driving mechanism (70) is also used to drive the locking sleeve (20) to rotate.

2. The clamp for inspecting gas cylinders (30) as described in claim 1, characterized in that, The driving mechanism (70) includes: a first driving sleeve (71) sleeved outside the inflation tube (60), the upper end of the first driving sleeve (71) being connected to the frame (10), and the first driving sleeve (71) being slidably connected to the inflation tube (60) in a vertical direction; a second driving sleeve (72) with its upper inner wall threadedly connected to the outer wall of the first driving sleeve (71), the second driving sleeve (72) sleeved outside the inflation tube (60), and the second driving sleeve (72) being rotatably connected to the inflation tube (60); and a power mechanism (73) for driving the second driving sleeve (72) to rotate.

3. A clamp for inspecting gas cylinders (30) as described in claim 2, characterized in that, The drive mechanism (70) further includes a connecting spring (74), the upper end of which is connected to the frame (10), and the lower end of which is connected to the upper end of the first drive sleeve (71).

4. A clamp for inspecting gas cylinders (30) as described in claim 3, characterized in that, The inner wall of the second drive sleeve (72) is provided with a rack along the circumferential direction; the power mechanism (73) includes: a motor (731) located inside the second drive sleeve (72), the motor (731) being fixedly connected to the air pipe (60); a rotating shaft (732) being fixedly connected coaxially to the output end of the motor (731); and a drive gear (733) being fixedly connected coaxially to the rotating shaft (732), the drive gear (733) meshing with the rack on the inner wall of the second drive sleeve (72).

5. A clamp for inspecting gas cylinders (30) as described in any one of claims 2-4, characterized in that, The drive mechanism (70) further includes: a mating block (75) fixedly connected to the outer wall of the locking sleeve (20); and a drive block (76) with its upper end connected to the second drive sleeve (72) and its lower end extending to the side of the mating block (75), the side of the drive block (76) abutting against the mating block (75).

6. A clamp for inspecting gas cylinders (30) as described in claim 5, characterized in that, The driving mechanism (70) further includes: a support block (77) connected to the outer wall of the second driving sleeve (72), having a vertical support hole (771) thereon; and a limiting ring (78) slidably sleeved on the second driving sleeve (72) vertically, which can slide downward and abut against the support block (77); the upper end of the driving block (76) slides through the support hole (771) and is fixedly connected to the limiting ring (78); the lower end of the driving block (76) has inclined contact surfaces (761) on both sides; the contact surfaces (761) can abut against the mating block (75).

7. A clamp for inspecting gas cylinders (30) as described in claim 6, characterized in that, The drive mechanism (70) further includes: a mating ring (79) sleeved on the upper end of the second drive sleeve (72); and a pressure spring (80) sleeved on the second drive sleeve (72), the upper end of the pressure spring (80) abutting against the mating ring (79), and the lower end of the pressure spring (80) abutting against the limiting ring (78).

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