Protecting and sealing device for filling bottle opening of pressure gas bottle

Abstract

The utility model discloses a pressure gas cylinder filling bottleneck protecting and sealing device which comprises a bottle cap, a lock nut, a threaded sleeve, a sealing connecting pipe and a check valve, a first mounting hole is formed in the top of the bottle cap in the axial direction, the lock nut is inserted into the first mounting hole and is in threaded connection with the bottle cap, a second mounting hole is formed in the bottom of the lock nut in the axial direction, and the sealing connecting pipe is in threaded connection with the second mounting hole. The threaded sleeve is located in the second mounting hole, the sealing connecting pipe penetrates through the lock nut and the threaded sleeve and is in threaded connection with the threaded sleeve, the check valve is arranged in the first mounting hole and penetrates through the bottom of the bottle cap, an air channel is formed in the check valve, an opening in one end of the air channel is located in the top of the check valve, and an opening in the other end of the air channel is located in the side edge of the check valve. By means of the arrangement, when the sealing connecting pipe is separated from the bottle cap, the check valve can block communication between the interior and the exterior of the gas cylinder, the effect of preventing gas in the gas cylinder from leaking outwards is achieved, waste of gas resources is avoided, and meanwhile potential safety hazards are eliminated.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas cylinders, and in particular relates to a protective sealing device for a filling bottle mouth of a pressure gas cylinder. Background Art

[0002] In industrial production, it is necessary to connect gas cylinders and pipelines in order to fill gas into the gas cylinders or use the gas in the cylinders. If the pipeline is directly slid and inserted into the gas cylinders, a gap is likely to appear at the contact position between the gas cylinders and the pipeline, causing gas leakage in the cylinders.

[0003] A Chinese patent with announcement number CN214525112U discloses a bottle mouth sealing device, which includes an end plug, a sealing pipe, a lock nut and a threaded sleeve. The above scheme uses the lock nut to push the threaded sleeve, and the threaded sleeve transmits the thrust to the sealing pipe, so that the sealing pipe is tightly pressed into the perforation of the end plug to achieve the sealing of the bottle mouth of the gas cylinder.

[0004] However, the main problems with the bottle mouth sealing device are: when the sealing pipe, lock nut or threaded sleeve needs to be replaced and the sealing pipe is separated from the bottle plug, and there is still gas in the gas cylinder, gas leakage will occur, which not only wastes gas resources but also poses a safety hazard. Utility Model Content

[0005] The utility model aims to provide a protective sealing device for filling a pressure gas cylinder, so as to solve the problem in the prior art that the gas in the gas cylinder may leak due to the separation of the sealing pipe and the bottle cap.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A protective sealing device for filling a pressure gas cylinder bottle mouth, comprising a bottle cap, a lock nut, a threaded sleeve, a sealing pipe and a check valve, wherein a first mounting hole is axially arranged at the top of the bottle cap, the bottle cap is used to seal the bottle mouth, the lock nut is inserted into the first mounting hole, and the lock nut is threadedly connected to the bottle cap, a second mounting hole is axially arranged at the bottom of the lock nut, the threaded sleeve is located in the second mounting hole, the threaded sleeve slides in the second mounting hole along the vertical direction, and the top of the threaded sleeve can abut against the lock nut, the sealing pipe is respectively penetrated by the lock nut and the threaded sleeve, and the sealing pipe is threadedly connected to the threaded sleeve, the check valve is arranged in the first mounting hole, and the check valve is penetrated at the bottom of the bottle cap, an airway is arranged in the check valve, one end of the airway is opened at the top of the check valve, and the other end of the airway is opened at the side of the check valve.

[0008] The principle and effect of this technical solution:

[0009] The sealing pipe is passed through the lock nut and the threaded sleeve, and the sealing pipe and the threaded sleeve are connected by threads. The threaded sleeve is placed in the second mounting hole, and the threaded sleeve is slid so that the top of the threaded sleeve abuts against the lock nut. Then the lock nut is inserted into the first mounting hole, and the lock nut is connected to the bottle cap by threads. The lock nut is rotated to move the lock nut toward the bottom of the first mounting hole. The lock nut pushes the threaded sleeve, and the threaded sleeve transmits the thrust to the sealing pipe so that the sealing pipe is tightly pressed on the check valve in the first mounting hole. The airway opening at the top of the check valve is connected with the sealing pipe. The lock nut is continued to be rotated to make the sealing pipe push the check valve downward. When the lower edge of the airway opening on the side of the check valve is lower than the bottom of the bottle cap, the airway connects the sealing pipe with the inside of the gas cylinder. At this time, inflation and gas use can be carried out.

[0010] Reverse the lock nut to move it away from the bottom of the first mounting hole. The sealing pipe loses the thrust from the lock nut, and the check valve starts to reset. When the lower edge of the airway opening on the side of the check valve is higher than the bottom of the bottle cap, the gas cannot flow outward.

[0011] Through the above arrangement, when the sealing pipe is separated from the bottle cap, the check valve can block the connection between the inside and outside of the gas cylinder, thereby preventing the gas in the gas cylinder from leaking out, avoiding wasting gas resources and eliminating safety hazards.

[0012] In the utility model, a third mounting hole is axially arranged at the bottom of the first mounting hole, the check valve includes a valve body and a compression spring, a first edge is arranged on the periphery of the top of the valve body, a second edge is arranged on the periphery of the bottom of the valve body, the inner diameter of the third mounting hole is smaller than the diameter of the first edge, the compression spring is sleeved on the valve body, and the compression spring is located between the first edge and the bottom of the third mounting hole.

[0013] In the utility model, a first sealing groove is arranged at the top of the second bead along the outer periphery of the valve body, and a first sealing ring is arranged in the first sealing groove. Through the above arrangement, gas leakage from the contact position between the check valve and the bottle cap can be avoided.

[0014] In the utility model, a through groove is arranged on the side of the bottle cap, a limiting groove is arranged on the side of the lock nut, a limiting component is inserted into the through groove, and one end of the limiting component extends into the limiting groove.

[0015] Before locking the lock nut, drive the limit assembly to move in the direction away from the first mounting hole until the end of the limit assembly close to the first mounting hole moves outside the first mounting hole, and then rotate the lock nut to move the lock nut downward. When the lock nut rotates and descends to the preset position, the limit assembly is reset until the end of the limit assembly close to the first mounting hole extends into the limit groove.

[0016] The above arrangement can prevent the lock nut from loosening during the gas filling process due to vibrations generated by operating conditions, thereby preventing gas leakage.

[0017] In the utility model, two protrusions are arranged in the through groove, and the two protrusions form a slide groove. The limit assembly includes a limit block, a slider, a round rod and a rod handle. The slider is inserted into the slide groove, and the slider can slide along the slide groove. The end of the slider close to the first mounting hole is fixedly connected to the limit block, the end of the slider away from the first mounting hole is fixedly connected to one end of the round rod, and the other end of the round rod is fixedly connected to the rod handle. A tension spring is arranged on the outer sleeve of the round rod, and the tension spring is located between the rod handle and the protrusion.

[0018] Through the above arrangement, when the lock nut rotates and descends to a preset position, the limit block can automatically embed into the limit groove and limit the lock nut from moving in the opposite direction, thereby improving work efficiency.

[0019] In the utility model, the bottom of the bottle cap is provided with a side wall, the bottom of the bottle cap is provided with a second sealing groove along the inner circumference of the side wall, and a second sealing ring is installed inside the second sealing groove. Through the above arrangement, gas leakage from the contact position between the bottle cap and the bottle mouth of the gas cylinder is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the axonometric drawing of the overall structure of the utility model;

[0021] Figure 2 This is an exploded view of the components of the utility model;

[0022] Figure 3 It is a front sectional view of the overall structure of the utility model;

[0023] Figure 4 It is a front sectional view of the components of the utility model. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples:

[0025] The figure marks in the drawings of the specification include: 10, bottle cap; 11, first mounting hole; 12, third mounting hole; 13, side wall; 14, through groove; 15, protrusion; 151, slide groove; 16, second sealing groove; 20, lock nut; 21, second mounting hole; 22, limit groove; 30, threaded sleeve; 40, sealing connecting pipe; 50, check valve; 51, airway; 52, compression spring; 53, first edge; 54, second edge; 541, first sealing groove; 55, valve body; 60, limit assembly; 61, limit block; 62, slider; 63, round rod; 631, tension spring; 64, rod handle; 70, first sealing ring; 80, second sealing ring.

[0026] As attached Figure 1-4As shown, the utility model discloses a pressure gas cylinder filling bottle mouth protection sealing device, including a bottle cap 10, a lock nut 20, a threaded sleeve 30, a sealing pipe 40 and a check valve 50, the top of the bottle cap 10 is axially provided with a first mounting hole 11, the bottle cap 10 is used to seal the bottle mouth, the lock nut 20 is inserted into the first mounting hole 11, and the lock nut 20 is threadedly connected to the bottle cap 10, the bottom of the lock nut 20 is axially provided with a second mounting hole 22, the threaded sleeve 30 is located in the second mounting hole 22, and the threaded sleeve 30 is located in the second mounting hole 22. The threaded sleeve 30 slides in the second mounting hole 22 along the vertical direction, and the top of the threaded sleeve 30 can abut against the lock nut 20, the sealing pipe 40 is respectively penetrated through the lock nut 20 and the threaded sleeve 30, and the sealing pipe 40 and the threaded sleeve 30 are threadedly connected, the check valve 50 is arranged in the first mounting hole 11, and the check valve 50 is penetrated through the bottom of the bottle cap 10, an airway 51 is arranged in the check valve 50, one end of the airway 51 is opened at the top of the check valve 50, and the other end of the airway 51 is opened at the side of the check valve 50.

[0027] In this embodiment, a third mounting hole 12 is axially arranged at the bottom of the first mounting hole 11, and the check valve 50 includes a valve body 55 and a compression spring 52. A first edge 53 is arranged on the outer periphery of the top of the valve body 55, and a second edge 54 is arranged on the outer periphery of the bottom of the valve body 55. The inner diameter of the third mounting hole 12 is smaller than the diameter of the first edge 53. The compression spring 52 is sleeved on the valve body 55, and the compression spring 52 is located between the first edge 53 and the bottom of the third mounting hole 12.

[0028] In this embodiment, a first sealing groove 541 is provided at the top of the second bead 54 along the outer circumference of the valve body 55 , and a first sealing ring 70 is installed in the first sealing groove 541 .

[0029] In this embodiment, a through groove 14 is provided on the side of the bottle cap 10, and a limiting groove 23 is provided on the side of the lock nut 20. A limiting component 60 is inserted into the through groove 14, and one end of the limiting component 60 extends into the limiting groove 23. The through groove 14 and the limiting groove 23 are arranged so that when the lock nut 20 pushes the sealing pipe 40 to be tightly pressed on the check valve 50 in the first mounting hole 11, the positions of the through groove 14 and the limiting groove 23 correspond.

[0030] In this embodiment, two protrusions 15 are provided in the through groove 14, and the two protrusions 15 form a slide groove 151. The limit assembly 60 includes a limit block 61, a slider 62, a round rod 63 and a handle 64. The slider 62 is inserted into the slide groove 151, and the slider 62 can slide along the slide groove 151. The end of the slider 62 close to the first mounting hole 11 is fixedly connected to the limit block 61, and the end of the slider 62 away from the first mounting hole 11 is fixedly connected to one end of the round rod 63, and the other end of the round rod 63 is fixedly connected to the handle 64. A tension spring 631 is provided on the outer sleeve of the round rod 63, and the tension spring 631 is located between the handle 64 and the protrusion 15. The limit block 61 is set to a 1 / 8 sphere, and the spherical surface of the limit block 61 is opposite to the rotation direction when the lock nut 20 is locked.

[0031] In this embodiment, a side wall 13 is disposed at the bottom of the bottle cap 10 , a second sealing groove 16 is disposed at the bottom of the bottle cap 10 along the inner circumference of the side wall 13 , and a second sealing ring 80 is installed inside the second sealing groove 16 .

[0032] The specific implementation process is as follows:

[0033] The sealing pipe 40 is passed through the lock nut 20 and the threaded sleeve 30, and the sealing pipe 40 and the threaded sleeve 30 are connected by threads, the threaded sleeve 30 is placed in the second mounting hole 22, and the threaded sleeve 30 is slid so that the top of the threaded sleeve 30 abuts against the lock nut 20, and then the lock nut 20 is inserted into the first mounting hole 11, the lock nut 20 is connected to the bottle cap 10 by threads, and the lock nut 20 is rotated to move the lock nut 20 to the bottom of the first mounting hole 11, and the lock nut 20 pushes the threaded sleeve 30, and the screw The threaded sleeve 30 transmits the thrust to the sealing pipe 40, so that the sealing pipe 40 is tightly pressed on the check valve 50 in the first mounting hole 11, and the opening of the airway 51 located at the top of the check valve 50 is connected with the sealing pipe 40. The lock nut 20 continues to be rotated to make the sealing pipe 40 push the check valve 50 to move downward. When the lower edge of the opening of the airway 51 located on the side of the check valve 50 is lower than the bottom of the bottle cap 10, the airway 51 connects the sealing pipe 40 with the inside of the gas cylinder, and then inflation and gas use can be carried out.

[0034] The lock nut 20 is reversed to move away from the bottom of the first mounting hole 11, and the sealing pipe 40 loses the thrust from the lock nut 20, and the check valve 50 starts to reset. When the lower edge of the opening of the airway 51 on the side of the check valve 50 is higher than the bottom of the bottle cap 10, the gas cannot flow outward.

[0035] Before locking the lock nut 20, drive the limit assembly 60 to move in the direction away from the first mounting hole 11 until the end of the limit assembly 60 close to the first mounting hole 11 moves to the outside of the first mounting hole 11, and then rotate the lock nut 20 to move the lock nut 20 downward. When the lock nut 20 rotates and descends to the preset position, the limit assembly 60 performs a reset movement until the end of the limit assembly 60 close to the first mounting hole 11 extends into the limit groove 23.

[0036] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical scheme or characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the technical scheme of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A pressure gas cylinder filling bottle mouth protection sealing device, characterized in that: include: A bottle cap, wherein a first mounting hole is axially arranged on the top of the bottle cap, and the bottle cap is used to seal the bottle mouth; A lock nut, the lock nut is inserted into the first mounting hole, the lock nut is threadedly connected to the bottle cap, and a second mounting hole is axially arranged at the bottom of the lock nut; A threaded sleeve, wherein the threaded sleeve is located in the second mounting hole, the threaded sleeve slides in the second mounting hole along a vertical direction, and the top of the threaded sleeve can abut against the lock nut; A sealing pipe, wherein the sealing pipe is respectively inserted into the lock nut and the threaded sleeve, and the sealing pipe and the threaded sleeve are threadedly connected; The check valve is arranged in the first mounting hole, and the check valve is penetrated through the bottom of the bottle cap, an airway is arranged in the check valve, one end of the airway is opened at the top of the check valve, and the other end of the airway is opened at the side of the check valve.

2. The protective sealing device for filling port of pressure gas cylinder according to claim 1, characterized in that: A third mounting hole is axially arranged at the bottom of the first mounting hole, the check valve includes a valve body and a compression spring, a first edge is arranged on the periphery of the top of the valve body, a second edge is arranged on the periphery of the bottom of the valve body, the inner diameter of the third mounting hole is smaller than the diameter of the first edge, the compression spring is sleeved on the valve body, and the compression spring is located between the first edge and the bottom of the third mounting hole.

3. The protective sealing device for filling port of pressure gas cylinder according to claim 2, characterized in that: A first sealing groove is arranged at the top of the second edge along the outer periphery of the valve body, and a first sealing ring is arranged in the first sealing groove.

4. The protective sealing device for filling port of pressure gas cylinder according to claim 1, characterized in that: The bottle cap side is provided with a through slot, the lock nut side is provided with a limiting slot, a limiting component is inserted into the through slot, and one end of the limiting component extends into the limiting slot.

5. The protective sealing device for filling port of pressure gas cylinder according to claim 4, characterized in that: Two protrusions are arranged in the through groove, and the two protrusions form a slide groove. The limit assembly includes a limit block, a slider, a round rod and a rod handle. The slider is inserted into the slide groove and can slide along the slide groove. One end of the slider close to the first mounting hole is fixedly connected to the limit block, and one end of the slider away from the first mounting hole is fixedly connected to one end of the round rod, and the other end of the round rod is fixedly connected to the rod handle. A tension spring is arranged on the outer sleeve of the round rod, and the tension spring is located between the rod handle and the protrusion.

6. The protective sealing device for filling port of a pressure gas cylinder according to any one of claims 1 to 5, characterized in that: The bottom of the bottle cap is provided with a side wall, the bottom of the bottle cap is provided with a second sealing groove along the inner circumference of the side wall, and a second sealing ring is installed inside the second sealing groove.

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