Non-return sealing structure of high-pressure air valve

Abstract

The utility model provides a high-pressure air valve non-return sealing structure which comprises an upper connecting flange, a limiting clamping seat, a reverse thrust spring, a non-return sealing plug seat and an inner damping column, and a set of inner sealing bearings used for being connected with a rotating rod are arranged at the center positions in the limiting clamping seat and a side sealing cover. The check valve has the advantages that after high-pressure gas enters the valve cavity through the gas inlet, an operator rotates the rotary handle to drive the rotary rod to move inwards, the outer connecting thread of the rotary rod is meshed and screwed with the inner connecting thread groove of the sealing seat, the check sealing plug seat is pushed to be separated from the sealing embedded base, a gas channel is opened, and at the moment, the reverse thrust spring is compressed to store energy; and when gas flows forwards, pressure acts on the non-return sealing plug seat to assist in maintaining an open state of a passage, and gas supply is stopped or reverse flow occurs, the reverse thrust spring releases elastic force to push the non-return sealing plug seat to return, and the non-return sealing plug seat is tightly embedded with the sealing embedded base to form physical sealing and block gas reverse flow.

Description

TECHNICAL FIELD

[0001] The utility model belongs to high pressure air valve technical field relates to a high pressure air valve check sealing structure. BACKGROUND

[0002] The existing high pressure air valve has the shortcomings in the aspect of air reverse flow cutoff mainly including insufficient sealing performance, slow response speed, poor durability and high maintenance cost. The causes of these shortcomings are usually related to valve design, material selection, manufacturing precision and use environment. For example, aging, wear of sealing material or unreasonable valve structure design may lead to the decline of sealing performance, so as to fail to effectively prevent air reverse flow. Slow response speed may be due to large inertia of valve action mechanism or delay of control system. Poor durability may be due to wear and corrosion under high pressure environment, and frequent maintenance increases cost.

[0003] The conventional countermeasures include using higher quality sealing material, improving valve design to improve response speed, adopting high pressure and corrosion resistant material and regular maintenance and replacement of wearing parts. However, the disadvantages of these methods are that using high quality material increases cost, improving design may need complex engineering and additional test verification, and frequent maintenance increases downtime and labor cost, so there is an urgent need for a high pressure air valve check sealing structure to solve the above problems. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a high pressure air valve check sealing structure to solve the problems in the background art.

[0005] The utility model discloses the following technical scheme realizes: a high pressure air valve check sealing structure, include: upper connection flange and inner damping column, the limit seat is equipped with a group of inner sealing bearing for being connected with the rotary rod in the inside center position of side cover, the inner sealing bearing is equipped with a group of rotary rod for pushing the rotary rod of moving check sealing plug seat, rotary rod right side is equipped with a group of handle for manually rotating the rotary rod of rotary handle;

[0006] The rotary handle and the rotary rod are fixedly connected through bolts, the outer connecting thread for thread sealing rotation with the inner wall of the sealing seat is arranged on the outer side of the left end of the rotary rod, the inner connecting thread groove for thread rotation with the outer connecting thread is arranged on the inner wall of the sealing seat, the outer connecting thread and the inner connecting thread groove are in sealing rotation during the rotation of the rotary rod, the front side of the sealing seat is a concave structure in cross section, and the inner damping column for sealing connection with the check sealing plug seat is arranged on the left side of the rotary rod.

[0007] As a preferred implementation, the left side of the inner damping column is fixedly connected with the left side of the rotating rod, and the right side of the inner damping column is fixedly connected with the check sealing plug seat. The outer side of the inner damping column is provided with a set of reverse thrust springs for providing active check support for the check sealing plug seat.

[0008] As a preferred implementation, the left side and the right side of the reverse thrust spring are respectively limitedly connected with the sealing seat and the check sealing plug seat. When the check sealing plug seat and the sealing inner embedding base are mutually sealed and embedded, the spring is still in a compressed state. In actual use, after high-pressure gas enters the valve cavity through the gas inlet, the operator rotates the rotating handle to drive the rotating rod to move inward. The outer connecting thread of the rotating rod is engaged and screwed with the inner connecting screw groove of the sealing seat, the check sealing plug seat is pushed away from the sealing inner embedding base, and the gas passage is opened. At this time, the reverse thrust spring is compressed and stored energy, providing a reverse support force. When the gas flows forward, the pressure acts on the check sealing plug seat to assist in maintaining the open state of the passage. When the gas supply or reverse flow is stopped, the reverse thrust spring releases the elastic force, pushes the check sealing plug seat back to the position, and tightly embeds with the sealing inner embedding base to form a physical seal, blocking the reverse flow of gas. The inner damping column is rigidly connected with the rotating rod to ensure the displacement accuracy of the check sealing plug seat and reduce vibration interference. The rotating rod is matched with the inner sealing bearing to reduce friction loss. The flange connection ensures the overall air tightness. The opening and closing degree is adjusted by the rotating handle throughout the process, and the forced locking and pressure self-adaptive check functions are combined to realize the one-way controllable conveying and reverse sealing of high-pressure gas.

[0009] As a preferred implementation, the outer side of the check sealing plug seat is provided with a set of sealing inner embedding bases for sealing and embedding contact with the check sealing plug seat.

[0010] As a preferred implementation, the upper end of the upper connecting flange is sealingly connected with the external high-pressure air input device, and the gas outlet of the external high-pressure air input device is in communication with the inside of the gas inlet. The lower end of the upper connecting flange is provided with a set of valve housings for passing high-pressure air.

[0011] As a preferred implementation, the valve housing is provided with a set of valve cavities inside for passing high-pressure air. The upper end of the valve housing is an integral structure with the upper connecting flange. The left side of the valve housing is provided with a set of side connecting flanges for sealingly connecting with the external high-pressure air receiving pipe.

[0012] As a preferred embodiment, the right side of the valve shell is provided with a group of side covers for sealing the inside of the valve shell, the side covers are in flange structure with the right side of the valve shell and are connected and fixed by bolts and locking nuts, the right side of the side covers is provided with a group of limiting seats for limiting the position of the handle, the limiting seats are made of rubber, in actual use, after high-pressure air enters the valve cavity from the gas inlet of the upper connecting flange, the handle is manually rotated to drive the rotating rod to move inward, the outer connecting thread of the rotating rod is engaged and screwed with the inner connecting screw groove of the sealing seat, the check sealing plug seat is pushed away from the sealing embedded base, the valve is opened, at this time, the reverse push spring is compressed and stored, air flows to the output end of the side connecting flange through the valve cavity, when closing, the handle is rotated in reverse, the spring releases the elastic force to push the check sealing plug seat back to position, and is tightly embedded with the sealing embedded base to form physical sealing, thereby blocking the reverse flow of air, the side covers are fixed with the valve shell by bolts to ensure the sealing performance of the cavity.

[0013] After the above technical scheme is adopted, the high-pressure gas enters the valve cavity through the gas inlet, the operator rotates the handle to drive the rotating rod to move inward, the outer connecting thread of the rotating rod is engaged and screwed with the inner connecting screw groove of the sealing seat, the check sealing plug seat is pushed away from the sealing embedded base, and the gas passage is opened, at this time, the reverse push spring is compressed and stored, providing a reverse supporting force, when the gas flows forward, the pressure acts on the check sealing plug seat to assist in maintaining the open state of the passage, when the gas supply is stopped or flows in reverse, the reverse push spring releases the elastic force to push the check sealing plug seat back to position, and is tightly embedded with the sealing embedded base to form physical sealing, thereby blocking the reverse flow of gas.

[0014] In actual use, after high-pressure air enters the valve cavity from the gas inlet of the upper connecting flange, the handle is manually rotated to drive the rotating rod to move inward, the outer connecting thread of the rotating rod is engaged and screwed with the inner connecting screw groove of the sealing seat, the check sealing plug seat is pushed away from the sealing embedded base, the valve is opened, at this time, the reverse push spring is compressed and stored, air flows to the output end of the side connecting flange through the valve cavity, when closing, the handle is rotated in reverse, the spring releases the elastic force to push the check sealing plug seat back to position, and is tightly embedded with the sealing embedded base to form physical sealing, thereby blocking the reverse flow of air, the side covers are fixed with the valve shell by bolts to ensure the sealing performance of the cavity. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0016] Figure 1 It is a front view structural schematic diagram of the high-pressure air valve check sealing structure of the present application.

[0017] Figure 2 It is a top view structural schematic diagram of the high-pressure air valve check sealing structure of the present application.

[0018] Figure 3 It is Figure 2 It is a rear view structural schematic diagram of the section line.

[0019] Figure 4 It is a rear view structural schematic diagram of the valve cavity inside the high-pressure air valve check sealing structure of the present application.

[0020] In the figure: 100-upper connecting flange, 110-inlet, 120-valve shell, 130-side cover, 140-rotary handle, 150-rotary rod, 160-limiting seat, 170-side connecting flange, 180-outer connecting thread, 190-inner connecting groove, 200-valve cavity, 210-sealing seat, 220-reverse push spring, 230-check sealing plug seat, 240-sealing inner embedded base, 250-inner damping column. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0022] Please refer to Figures 1-4 , as the first embodiment of the present application:

[0023] A high-pressure air valve check sealing structure, comprising: an upper connecting flange 100, a limiting seat 160, a reverse push spring 220, a check sealing plug seat 230, a sealing embedded base 240, and an inner damping column 250, the limiting seat 160 is provided with a group of inner sealing bearings for connecting with the rotating rod 150 at the inner center position of the side cover 130, the inner sealing bearings are provided with a group of rotating rods 150 for pushing the check sealing plug seat 230 to move, the right side of the rotating rod 150 is provided with a group of rotating handles 140 for manually rotating the rotating rod 150;

[0024] The rotating handle 140 and the rotating rod 150 are fixed by bolt connection, the left end of the rotating rod 150 is provided with a group of outer connecting threads 180 for thread sealing rotation with the inner wall of the sealing seat 210, the inner wall of the sealing seat 210 is provided with a group of inner connecting screw grooves 190 for thread rotation with the outer connecting threads 180, the outer connecting threads 180 and the inner connecting screw grooves 190 are in sealing rotation during the rotation of the rotating rod 150, the front side of the sealing seat 210 is a concave structure in cross section, and the left side of the rotating rod 150 is provided with a group of inner damping columns 250 for sealing connection with the check sealing plug seat 230.

[0025] The left side of the inner damping column 250 is connected with the left side of the rotating rod 150, the right side of the inner damping column 250 is connected with the check sealing plug seat 230, and the outer side of the inner damping column 250 is provided with a group of reverse push springs 220 for providing active check support for the check sealing plug seat 230.

[0026] The left side and the right side of the reverse push spring 220 are respectively connected with the sealing seat 210 and the check sealing plug seat 230, when the check sealing plug seat 230 and the sealing embedded base 240 are mutually sealed and embedded, the spring is still in a compressed state, in actual use, after the high-pressure gas enters the valve cavity 200 through the gas inlet 110, the operator rotates the rotating handle 140 to drive the rotating rod 150 to move inward, the outer connecting threads 180 of the rotating rod 150 are engaged and tightened with the inner connecting screw grooves 190 of the sealing seat 210, the check sealing plug seat 230 is pushed away from the sealing embedded base 240, and the gas passage is opened, at this time, the reverse push spring 220 is compressed to store energy and provide reverse support force, when the gas flows forward, the pressure acts on the check sealing plug seat 230 to assist in maintaining the open state of the passage, when the gas supply is stopped or flows reversely, the reverse push spring 220 releases the elastic force to drive the check sealing plug seat 230 to return to the position and tightly embed with the sealing embedded base 240 to form physical sealing and block the reverse flow of the gas, the inner damping column 250 is rigidly connected with the rotating rod 150 to ensure the displacement accuracy of the check sealing plug seat 230 and reduce vibration interference, the rotating rod 150 is matched with the inner sealing bearings to reduce friction loss, the flange connection ensures the overall air tightness, the opening and closing degree is manually adjusted through the rotating handle 140 throughout the process, and the function of forced locking and pressure self-adaptive check is combined to realize one-way controllable conveying and reverse sealing of high-pressure gas.

[0027] Please refer toFigures 1-4 As a second embodiment of the utility model: based on the above-mentioned embodiment, further, the check sealing plug seat 230 is externally provided with a group of sealing inner embedding bases 240 for sealingly embedding contact, the sealing inner embedding bases 240 are sealingly embedded with the check sealing plug seat 230.

[0028] The upper connecting flange 100 upper end is sealingly connected with the external high-pressure air input device, and the external high-pressure air input device gas outlet is communicated with the gas inlet 110, and the upper connecting flange 100 lower end is provided with a group of valve housings 120 for high-pressure air flow.

[0029] The valve housing 120 is internally provided with a group of valve cavities 200 for high-pressure air flow, and the valve housing 120 upper end is integrated with the upper connecting flange 100, and the valve housing 120 left side is provided with a group of side connecting flanges 170 for sealingly connecting with the external high-pressure air receiving pipe.

[0030] The valve housing 120 right side is provided with a group of side covers 130 for sealingly blocking the valve housing 120, and the side cover 130 is flange structure with the valve housing 120 right side and is connected and fixed by bolt and locking nut, and the side cover 130 right side is provided with a group of limiting clamping bases 160 for limiting the position of the handle 140, and the limiting clamping base 160 is made of rubber material, and in actual use, high-pressure air enters the valve cavity 200 from the gas inlet 110 of the upper connecting flange 100, and the handle 140 is manually rotated to drive the rotating rod 150 to move inward, the outer connecting thread 180 of the rotating rod 150 is engaged and screwed with the inner connecting screw groove 190 of the sealing seat 210, the check sealing plug seat 230 is pushed away from the sealing inner embedding base 240, and the valve is opened, and at this time, the reverse spring 220 is compressed and stored energy, air flows to the output end of the side connecting flange 170 through the valve cavity 200, and when closing, the handle 140 is reversely rotated, the spring releases the elastic force to push the check sealing plug seat 230 back to the position, and is tightly embedded with the sealing inner embedding base 240 to form physical sealing, and air reverse flow is blocked, and the side cover 130 is fixed with the valve housing 120 by bolt to guarantee the sealing property of the cavity; the limiting clamping base 160 is made of rubber, and the displacement range of the handle 140 is restricted to avoid overload, and the upper connecting flange 100 and the side connecting flange 170 are respectively connected with the external input and output pipelines, and the sealing structure between the flanges ensures no leakage under high-pressure working condition, the valve housing 120 is integrally formed to maintain structural strength, the rotating rod 150 is matched with the inner sealing bearing to reduce friction loss, the whole is controlled to open and close by the manual handle 140, and the spring self-resetting and double sealing design are combined to realize high-pressure air one-way conduction and reverse reliable cut-off.

[0031] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A high pressure air valve check seal structure comprising: The upper connecting flange (100), the limiting clamping seat (160), the reverse push spring (220), the check sealing plug seat (230), the sealing embedded base (240) and the inner damping column (250) are characterized in that: the limiting clamping seat (160) is provided with a group of inner sealing bearings for connecting with the rotating rod (150) at the inner center position of the side cover (130), the inner sealing bearings are provided with a group of rotating rods (150) for pushing the check sealing plug seat (230) to move, and the right side of the rotating rod (150) is provided with a group of handle knobs (140) for manually rotating the rotating rod (150). The handle knob (140) and the rotating rod (150) are fixedly connected through bolts, the left end of the rotating rod (150) is provided with a group of outer connecting threads (180) for thread sealing rotation with the inner wall of the sealing seat (210), the inner wall of the sealing seat (210) is provided with a group of inner connecting screw grooves (190) for thread rotation with the outer connecting threads (180), the outer connecting threads (180) and the inner connecting screw grooves (190) are in sealing rotation during the rotation of the rotating rod (150), the front side of the sealing seat (210) is a concave structure in cross section, and the left side of the rotating rod (150) is provided with a group of inner damping columns (250) for sealing connection with the check sealing plug seat (230).

2. A high pressure air valve check seal structure according to claim 1, wherein: The left side of the inner damping column (250) is fixedly connected with the left side of the rotating rod (150), the right side of the inner damping column (250) is fixedly connected with the check sealing plug seat (230), and the outer side of the inner damping column (250) is provided with a group of reverse push springs (220) for providing active check support for the check sealing plug seat (230).

3. A high pressure air valve check seal structure according to claim 2, wherein: The left side and the right side of the reverse push spring (220) are limitingly connected with the sealing seat (210) and the check sealing plug seat (230) respectively, and when the check sealing plug seat (230) and the sealing embedded base (240) are sealingly embedded with each other, the spring is still in a compressed state.

4. A high pressure air valve check seal structure according to claim 3, wherein: The outer side of the check sealing plug seat (230) is provided with a group of sealing embedded bases (240) for sealingly embedding contact therewith, and the sealing embedded base (240) is sealingly embedded with the check sealing plug seat (230).

5. A high pressure air valve check seal structure according to claim 4, wherein: The upper end of the upper connecting flange (100) is sealingly connected with the external high-pressure air input device, and the air outlet of the external high-pressure air input device is in communication with the air inlet (110) inside, and the lower end of the upper connecting flange (100) is provided with a group of valve housings (120) for allowing high-pressure air to flow.

6. A high pressure air valve check seal structure according to claim 5, wherein: The inner side of the valve housing (120) is provided with a group of valve cavities (200) for allowing high-pressure air to flow, the upper end of the valve housing (120) is an integral structure with the upper connecting flange (100), and the left side of the valve housing (120) is provided with a group of side connecting flanges (170) for sealingly connecting with the external high-pressure air receiving pipe.

7. A high pressure air valve check seal structure according to claim 6, wherein: The valve shell (120) right side is equipped with a group of side covers (130) for sealing the inside of the valve shell (120), the side cover (130) is flange structure with the right side of the valve shell (120) and is connected and fixed by bolts and locking nuts, the right side of the side cover (130) is equipped with a group of limiting clamping seats (160) for limiting the position of the handle (140), the limiting clamping seat (160) is made of a kind of rubber material.

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