CN113063006A - Air-adding valve - Google Patents
Air-adding valve Download PDFInfo
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- CN113063006A CN113063006A CN202110271594.XA CN202110271594A CN113063006A CN 113063006 A CN113063006 A CN 113063006A CN 202110271594 A CN202110271594 A CN 202110271594A CN 113063006 A CN113063006 A CN 113063006A
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- Prior art keywords
- valve
- wall
- gas
- air inlet
- shell
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
- F16K15/044—Check valves with guided rigid valve members shaped as balls spring-loaded
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/20—Check valves specially designed for inflatable bodies, e.g. tyres
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0245—Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention provides a gas filling valve which comprises a shell, and a filter element and a one-way valve which are positioned in a cavity defined by the shell, wherein one end of the shell is provided with a gas inlet, the other end of the shell is provided with a gas outlet, the filter element is positioned at the upstream of the one-way valve in the flowing direction of gas, the filter element is formed by sintering metal powder, and a plurality of micron-sized gas holes are formed for allowing the gas to pass through. The filter element of the gas adding valve is an integral body formed by sintering metal powder, the structure of the filter element is simpler than that of the existing filter element, the processing method is simpler, and in addition, a plurality of micron-sized air holes formed by sintering allow gas to pass through and improve the filtering effect.
Description
Technical Field
The invention relates to the field of gas valves, in particular to a gas filling valve.
Background
On the vehicle or the equipment that need use gaseous fuel or hold gaseous fuel's container, need install the gas filling valve, the gas filling valve generally can set up filter equipment, filters the gas of adding to reduce gaseous impurity content, prevent that impurity from influencing the life of vehicle or equipment. The filter element of the existing gas adding valve is generally made of brass into a conical body, a plurality of windows are arranged on the conical wall of the body, metal wires are wound at the windows to form a metal wire mesh, and gaps among the metal wires form a channel for gas to pass through. When the gas passes through the wire mesh, part of the impurities will adhere to the wire, thereby forming a barrier to the impurities. The filter element structure is complex, so that the processing cost of the whole gas filling valve is high. In addition, the gaps between the wires are large in size, and the effect of filtering impurities is not ideal. On the other hand, the filtration of such filter cartridges relies on the gaps between the wires on the side conical walls for filtration, while the flow direction of the gas under the action of the conical body is parallel to the conical walls, so that the flow direction of the majority of the gas is parallel to the gaps between the wires, which results in a less efficient filtration. In addition, when the gas fuel is hydrogen, the body and the metal wires of the filter element are easily hydrogen-brittle, resulting in a decrease in strength, which affects the service life of the filter element.
Disclosure of Invention
The invention provides an air filling valve which is simple to process and long in service life, and solves the problems that an existing air filling valve is complex in structure and short in service life.
The gas filling valve comprises a shell, and a filter element and a one-way valve which are positioned in a cavity enclosed by the shell, wherein one end of the shell is provided with a gas inlet, the other end of the shell is provided with a gas outlet, the filter element is positioned at the upstream of the one-way valve in the flowing direction of gas, the filter element is formed by sintering metal powder, and the filter element is densely provided with air holes which allow the gas to pass through and have micron-sized diameters.
Preferably, the filter element is formed by sintering stainless steel metal powder. The filter element comprises a top wall, a side wall connected with the top wall and an installation wall connected with the side wall, wherein the top wall, the side wall and the installation wall are integrally sintered and are in a hat shape, the top wall is in the shape of a hat top, the side wall is in the shape of a hat brim, the installation wall is in the shape of an annular hat brim, and at least the top wall and the side wall are provided with the air holes. The cross sections of the top wall, the side wall and the mounting wall of the filter element are circular, and the side wall inclines towards the direction far away from the circular axis from the top wall to the mounting wall.
Preferably, the diameter of the air holes is 30-40 microns.
Preferably, the housing includes a tubular air inlet housing and a tubular air outlet housing fixedly connected to the air inlet housing, an inner space of the air inlet housing and an inner space of the air outlet housing are communicated to form the cavity, the filter element is fixedly mounted in the inner space of the air inlet housing, and the check valve is mounted in the inner space of the air outlet housing.
As a preferred scheme, the air inlet casing has an air inlet end and a mounting end used for mounting with the air outlet casing, the air inlet end is provided with the air inlet, the air outlet casing has an air outlet end and a mounting end used for mounting with the air inlet casing, the air outlet end is provided with the air outlet, the inner wall of the air inlet casing is provided with a mounting step facing the mounting end of the air inlet casing, the top wall of the filter element is close to the air inlet and corresponds to the air inlet, the air charging valve further comprises a pressing plate, and the pressing plate is pressed by the air outlet casing in the direction of the filter element to press the filter element to enable the mounting wall of the filter element to be abutted against the mounting step in the fixed mounting state of the air inlet casing and the air outlet casing. Preferably, the outer wall of the middle part of the pressing plate protrudes outwards from the outer walls of the two ends of the pressing plate to form a first pressing plate step facing the filter element and a second pressing plate step facing the extrusion step and matched with the extrusion step.
As a preferred scheme, in a state that the air inlet shell and the air outlet shell are fixedly installed, the outer side wall of one end of the pressing plate is matched with the inner wall of the air inlet shell, the end sleeve of the pressing plate is provided with a first sealing ring to form sealing with the inner wall of the air inlet shell, the first sealing ring is located between the step of the first pressing plate and the installation wall of the filter element, the outer side wall of the other end of the pressing plate is matched with the inner wall of the air outlet shell, and the end sleeve of the pressing plate is provided with a second sealing ring to form sealing with the inner wall of the air outlet shell. As a preferable scheme, one end of the pressure plate, which is close to the filter element, is further sleeved with a check ring, and the check ring is located between the first sealing ring and the mounting step.
As the preferred scheme, the inner wall that the casing that admits air was equipped with the one end of air inlet is equipped with annular inlet seal groove, be equipped with the sealing washer that admits air in the inlet seal groove, the inlet seal groove is kept away from the lateral wall of air inlet inwards outstanding is close to the lateral wall of air inlet constitutes the air inlet step.
Preferably, the check valve comprises a cylindrical valve sleeve fixed on the inner wall of the air outlet housing, a valve core arranged in the valve sleeve and capable of moving relative to the valve sleeve, and a ball-shaped part, wherein the ball-shaped part is positioned at the upstream of the valve core and matched with the valve core in the flow direction of the air; one end, close to the pressure plate, of the valve sleeve is open, a valve sleeve opening allowing the valve core to penetrate through is formed in the other end of the valve sleeve, a valve sleeve first step facing the bead-shaped piece is further formed in one end, provided with the valve sleeve opening, of the valve sleeve, the side wall of the valve sleeve comprises a sealing portion capable of forming sealing fit with the bead-shaped piece and a channel portion provided with a long through hole extending along the length direction of the side wall, the long through hole extends to the end portion, provided with the valve sleeve opening, of the valve sleeve, and a ventilation opening is formed in the end wall of the end portion; the valve core comprises a sliding part and a passing part, the outer wall of the sliding part is in sliding fit with the inner wall of the valve sleeve, and one end of the passing part of the valve core passes through the valve sleeve opening of the valve sleeve; the gas adding valve further comprises a spring sleeved outside the passing part, the spring is located between the first step of the valve sleeve and the sliding part, and the ball-shaped part is located on one side of the sliding part of the valve core; when the valve is closed, the outer wall of the ball-shaped piece is matched with the inner wall of the sealing part of the sleeve to form a seal for gas, during hydrogenation, the gas pushes the ball-shaped piece to push the valve core to move towards the gas outlet direction by overcoming the spring force, and when the ball-shaped piece is separated from being matched with the sealing part, the valve is opened, and the gas can enter the long through hole and reach the gas outlet through the ventilation opening.
As a preferable scheme, the inner wall of the air outlet casing is further provided with a sealing limit step towards the installation end, a bead-shaped sealing ring is arranged between the sealing limit step and the pressure plate, the inner diameter of the bead-shaped sealing ring is smaller than the diameter of the bead-shaped part, and the bead-shaped part extrudes the bead-shaped sealing ring until the bead-shaped sealing ring is pressed against the pressure plate in a state that the valve is closed.
Preferably, the sliding part of the valve core is provided with a matching surface matched with the ball-shaped piece.
Preferably, the valve body has a vent hole penetrating both ends thereof.
Preferably, the shell and/or the filter element and/or the pressure plate and/or the check valve is made of 316L stainless steel subjected to solution treatment.
Compared with the prior art, the air adding valve has the following beneficial effects:
1. the filter element of the gas adding valve is formed by sintering metal powder, the structure of the filter element is simpler than that of the existing filter element, the filter element is densely provided with the air holes which allow gas to pass through and have micron-sized diameters, compared with the existing scheme that the metal wire is wound on the window of the body, the filter element is simpler in structure and simpler to manufacture, and on the other hand, the micron-sized air holes improve the filtering effect. Meanwhile, the filter element is a whole formed by sintering, and compared with fine metal, the strength of the filter element can be greatly improved. In this embodiment, the filter element is sintered from stainless steel metal powder.
2. The filter element comprises a top wall, a side wall connected with the top wall and an installation wall connected with the side wall, wherein the top wall and the side wall are integrally sintered with the installation wall and are in a hat shape, the top wall is in the shape of a hat top and is opposite to an air inlet, a plurality of air holes are distributed in the top wall, most of air passes through the air holes in the top wall under the action of air pressure, the top wall forms a main filtering surface, and the pressure of the air can improve the filtering efficiency.
Drawings
Fig. 1 is a schematic longitudinal sectional view of an air-entrapping valve according to an embodiment of the present invention.
Fig. 2 is an enlarged schematic structural view of a filter element of the gas filling valve according to an embodiment of the invention.
Fig. 3 is an enlarged schematic structural view of a valve element of the inflation valve according to an embodiment of the present invention.
Fig. 4 is an enlarged 135 ° rotation sectional structural diagram of a valve sleeve of a gas filling valve according to an embodiment of the invention.
Reference numerals
1, an outer shell, 11 an air inlet shell, 111 an air inlet, 112 an air inlet sealing groove, 113 an air inlet sealing ring, 114 an air inlet step, 115 a first mounting step, 116 a second mounting step, 12 an air outlet shell, 121 an air outlet, 122 an extrusion step and 123 a sealing limiting step;
2 filter element, 21 top wall, 22 side wall, 23 mounting wall;
3 pressing plates, 31 first pressing plate steps, 32 second pressing plate steps, 33 first sealing rings, 34 second sealing rings and 35 retainer rings;
4 bead, 41 bead seal;
5 valve housing, 51 sealing part, 52 channel part, 53 valve housing first step, 54 long through hole, 55 vent opening, 56 valve housing opening, 57 valve housing second step;
6, a valve core, a 61 sliding part, a 62 passing part, a 63 vent hole and a 64 valve core limiting step;
7 spring.
Detailed Description
The invention provides an air-entrapping valve which comprises a shell 1, and a filter element 2 and a one-way valve which are positioned in a cavity enclosed by the shell 1, wherein one end of the shell 1 is provided with an air inlet 111, the other end of the shell is provided with an air outlet 121, the filter element 2 is positioned at the upstream of the one-way valve (the preferable structure of the one-way valve is described below) in the flowing direction of air, the filter element 2 is formed by sintering metal powder, and the filter element 2 is densely provided with air holes which allow air to pass through and have micron-sized diameters.
The filter element 2 of the gas adding valve is formed by sintering metal powder, the structure of the filter element is simpler than that of the existing filter element, a plurality of micron-sized air holes are formed for allowing gas to pass through, compared with the existing scheme that a window of a metal wire wound body is provided, the filter element is simpler in structure and simpler to manufacture, and on the other hand, the micron-sized air holes improve the filtering effect. Meanwhile, the filter element 2 is a whole formed by sintering, and compared with fine metal, the strength of the filter element can be greatly improved. In this embodiment, the filter element 2 is sintered from stainless steel metal powder.
In this embodiment, the diameter of the air hole is controlled to be 30-40 microns, so that the air hole can allow the gas to pass through smoothly on one hand, and meanwhile, impurity particles with small diameters can be filtered, and the filtering effect is greatly improved. Pores are formed during sintering of the metal powder.
As shown in fig. 2, the filter element 2 includes a top wall 21, a side wall 22 connected to the top wall 21, and a mounting wall 23 connected to the side wall 22, the top wall 21, the side wall 22 and the mounting wall 23 are integrally sintered and are in a hat shape, wherein the top wall 21 is in a hat shape, in this embodiment, the top wall 21 is substantially parallel to the gas inlet 111, a plurality of gas holes are distributed on the top wall 21, most of the gas passes through the gas holes of the top wall 21 under the action of gas pressure, and the top wall 21 constitutes a main filtering surface. The side wall 22 is in the shape of a brim and the mounting wall 23 is in the shape of an annular brim. In this embodiment, the side wall 22 and the mounting wall 23 are also provided with air holes.
In the present embodiment, the top wall 21, the side wall 22, and the mounting wall 23 of the filter element 2 have a circular cross section, and the side wall 22 is inclined in a direction away from the axis of the circle in a direction from the top wall 21 toward the mounting wall 23. The inclined side wall 22 provides a guide for the gas flow, while part of the gas passes through the pores of the side wall 22, completing the filtration, with a very small amount of gas passing through the pores of the mounting wall 23.
As shown in fig. 1, the housing 1 includes a tubular air inlet housing 11 and a tubular air outlet housing 12 fixedly connected to the air inlet housing 11, an inner space of the air inlet housing 11 and an inner space of the air outlet housing 12 are communicated to form the cavity, the filter element 2 is fixedly installed in the inner space of the air inlet housing 11, and the check valve is installed in the inner space of the air outlet housing 12.
The air inlet casing 11 has the inlet end and be used for with the installation end of the installation of the casing 12 of giving vent to anger, the inlet end is equipped with air inlet 111, the casing 12 of giving vent to anger have give vent to anger the end and be used for with the installation end of the casing 11 installation of giving vent to anger, the end of giving vent to anger is equipped with gas outlet 121, the inner wall of the casing 11 of admitting air is equipped with the orientation the first installation step 115 of the installation end of the casing 11 of admitting air, the roof 21 of filter core 2 is close to air inlet 111 and with air inlet 111 is corresponding, the valve of admitting air still includes clamp plate 3 under the casing 11 of admitting air and the casing 12 fixed mounting's of giving vent to anger the state clamp plate 3 quilt thereby the casing 12 of giving vent to anger extrudees filter core 2 to the direction of filter. In this embodiment, the inner wall of the mounting end of the air outlet casing 12 is provided with a pressing step 122 facing the pressing plate 3, and the pressing plate 3 is pressed by the pressing step 122 toward the filter element 2.
In this embodiment, the inner wall of the air inlet housing 11 is provided with a second mounting step 116 facing the mounting end of the air inlet housing 11, and when the air inlet housing 11 and the air outlet housing 12 are mounted, the end wall of the air outlet housing 12 abuts against the second mounting step 116.
In this embodiment, the mounting end of the air inlet housing 11 is provided with an internal thread, the mounting end of the air outlet housing 12 is provided with an external thread matched with the internal thread, the end of the air outlet housing 12 moves towards the pressure plate 3 in the process that the air outlet housing 12 and the air inlet housing 11 are connected through the thread, and after the thread connection is completed, the end of the air outlet housing 12 presses against the pressure plate 3 towards the air inlet 111, so that the pressure plate 3 presses against the mounting wall 23 of the filter element 2, and the filter element 2 is extruded and fixed between the pressure plate 3 and the mounting step 115.
In this example, as shown in fig. 1, the outer wall of the middle portion of the pressing plate 3 protrudes outward from the outer walls of the two ends of the pressing plate 3, forming a first pressing plate step 31 facing the filter element 2 and a second pressing plate step 32 facing the pressing step 122 and cooperating with the pressing step 122.
The utility model discloses a filter cartridge, including inlet housing 11 and outlet housing 12, the lateral wall of 3 one ends of clamp plate with inlet housing 11's inner wall cooperation, the lateral wall of the other end with outlet housing 12's inner wall cooperation, clamp plate 3 is close to a pot head of filter core 2 and is equipped with first sealing washer 33, first sealing washer 33 is located first clamp plate step 31 with between the installation wall 23 of filter core 2, first sealing washer 33 at clamp plate 3 with form sealedly between inlet housing 11's the inner wall. The other end cover of clamp plate 3 is equipped with second sealing washer 34, second sealing washer 34 clamp plate 3 with it is sealed to form between the inner wall of casing 12 of giving vent to anger, in this embodiment, is equipped with annular seal groove on the clamp plate 3, the sealing washer is located in the seal groove.
As shown in fig. 1, a retainer ring 35 is further sleeved at one end of the pressure plate 3 close to the filter element 2, the retainer ring 35 is located between the first seal ring 33 and the mounting step 115, the mounting strength of the pressure plate 3 and the filter element 2 can be enhanced by the retainer ring 35, and meanwhile, the retainer ring 35 has a good protection effect on the first seal ring 33.
The inner wall of the end, provided with the air inlet 111, of the air inlet shell 11 is provided with an annular air inlet sealing groove 111, an air inlet sealing ring 113 is arranged in the air inlet sealing groove 111, and the side wall 22, far away from the air inlet 111, of the air inlet sealing groove 111 protrudes inwards to be close to the side wall 22 of the air inlet 111 to form an air inlet step 114. During gas filling, one end of the gas filling equipment extends into the gas inlet 111, the gas inlet step 114 forms a limit for the gas filling equipment, and meanwhile, the gas inlet sealing ring 113 forms a seal between the gas filling equipment and the inner wall of the gas inlet shell 11, so that gas leakage in the gas filling process is prevented.
The check valve comprises a cylindrical valve sleeve 5 fixed with the inner wall of the air outlet housing 12, a valve core 6 and a bead-shaped member 4, wherein the valve core 6 and the bead-shaped member 4 are arranged in the valve sleeve 5 and can move relative to the valve sleeve 5, and in the embodiment, the outer wall of the valve sleeve 5 is in interference fit with the inner wall of the air outlet housing 12. The ball 4 is located upstream of the valve element 6 and cooperates with one end of the valve element 6 in the direction of flow of the gas.
As shown in fig. 4, one end of the valve sleeve 5 close to the pressure plate 3 is open, the other end of the valve sleeve 5 is provided with a valve sleeve opening 56 for allowing one end of the valve core to pass through, and one end of the valve sleeve 5 provided with the valve sleeve opening 56 is further provided with a first valve sleeve step 53 facing the ball 4, the side wall of the valve sleeve 5 comprises a sealing part 51 capable of forming a sealing fit with the ball 4 and a channel part 52 provided with a long through hole 54 extending along the length direction of the side wall, wherein the first valve sleeve step 53 is located at the end of the channel part 52, and the long through hole 54 extends to the end part of the valve sleeve 5 provided with the valve sleeve opening 56 and forms a vent opening 55 at the end wall of the end part. The channel portion 52 of the valve sleeve 5 projects radially inwardly at its point where it meets the sealing portion 51 to form a second valve sleeve step 57 towards the ball 4 (i.e. towards the upstream gas flow during filling). In the present embodiment, the valve housing 5 is cylindrical, and four through holes 54 are uniformly distributed along the circumference of the channel portion 52, and fig. 4 shows a 135 ° rotation sectional view of the valve housing 5 of the gas filling valve, and the solid portion of the channel portion 52 and the through holes 54 can be seen at the same time. Meanwhile, the end wall of the valve sleeve 5 on the side close to the pressure plate 3 is flush with the sealing limit step 123, so that the end wall of the valve sleeve 5 on the side close to the pressure plate and the sealing limit step 123 together form a more firm limit for the sealing ring of the ball-shaped member 4.
As shown in fig. 3, the valve core 6 includes a sliding portion 61 and a through portion 62, an outer wall of the sliding portion 61 forms a sliding fit with an inner wall of the valve sleeve 5, and one end of the through portion 62 of the valve core 6 passes through the valve sleeve opening 56 of the valve sleeve 5, i.e., in a radially outward direction, the sliding portion 61 protrudes from the through portion 62 to form a valve core limiting step 64 facing the air outlet 121 (i.e., facing the downstream of the air flow during air filling). In the present embodiment, the valve body 6 has a vent hole 63 penetrating through both ends thereof, and the hole penetrates the sliding portion 61 and the passing portion 62 in the axial direction.
The gas adding valve further comprises a spring 7 sleeved outside the passing part 62, the spring 7 is located between the valve sleeve first step 53 and the valve core limiting step 64, the ball-shaped part 4 is located on one side of the sliding part 61 of the valve core 6, and the sliding part 61 of the valve core 6 is provided with a matching surface matched with the ball-shaped part 4.
When the gas is added, the ball 4 is pushed by the gas to push the valve core 6 to move towards the gas outlet 121 against the force of the spring 7, and when the ball 4 is separated from the matching with the sealing part 51, the gas can enter the long through hole 54 and reach the gas outlet 121 through the vent opening 5. When gas is added, even if the gas adding pressure is large, the valve core 6 is stopped when moving to the position where the valve core limit step 64 is abutted against the valve sleeve second step 57. In the non-aerated state, the spring 7 presses the valve core 6 and thus the bead 4 to close the valve, and in the aerated state, the gas presses the bead 4 through the vent holes 63 penetrating through the two ends of the valve core 6, so that the higher the pressure of the gas, the better the sealing between the bead 4 and the pressure plate 3.
In this embodiment, as shown in fig. 1, the inner wall of the outlet housing 12 further has a sealing and limiting step 123 facing the installation end, a bead sealing ring 41 is disposed between the sealing and limiting step 123 and the pressure plate 3, the inner diameter of the bead sealing ring 41 is smaller than the diameter of the bead 4, and in a state that the valve is closed, the bead 4 extrudes the bead sealing ring 41 until the bead sealing ring 41 is pressed against the pressure plate 3. The bead seal 41 prevents the bead 4 from directly colliding with the pressure plate 3 during the movement towards the pressure plate 3, on the one hand, and forms a reliable seal between the pressure plate 3 and the bead 4 when the valve is closed, on the other hand.
In addition, the outer wall of the outlet housing 12 is provided with threads for connection to a gas container or vehicle or other device using gas.
In this embodiment, the housing 1 and/or the filter element 2 and/or the pressure plate 3 and/or the check valve (including the ball 4, the valve sleeve 5, the valve element 6 and the spring 7) are made of 316L stainless steel subjected to solution treatment, and the filter element 2 is made of 316L stainless steel powder through sintering. The 316L stainless steel improves the organization structure after solution treatment, is insensitive to hydrogen, is not easy to reduce the strength due to hydrogen embrittlement, and is particularly suitable for hydrogen valves.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the invention.
Claims (9)
1. An air entrainment valve characterized by: the gas filling valve comprises a shell, and a filter element and a one-way valve which are arranged in a cavity defined by the shell, wherein one end of the shell is provided with a gas inlet, the other end of the shell is provided with a gas outlet, the filter element is arranged at the upstream of the one-way valve in the flowing direction of gas, the filter element is formed by sintering metal powder, the filter element is densely provided with gas holes which allow gas to pass through and have micron-sized diameters, the filter element comprises a top wall, a side wall connected with the top wall and an installation wall connected with the side wall, the top wall, the side wall and the installation wall are integrally sintered and are in a hat shape, the top wall is in the shape of a hat top, the top wall is parallel to the gas inlet and forms a main filtering surface correspondingly, the side wall is in the shape of a hat brim, the installation.
2. A dispensing valve according to claim 1, wherein: the cross sections of the top wall, the side wall and the mounting wall of the filter element are circular, and the side wall inclines towards the direction far away from the circular axis from the top wall to the mounting wall.
3. A dispensing valve according to claim 1, wherein: the shell comprises a tubular air inlet shell and a tubular air outlet shell fixedly connected with the air inlet shell, the inner space of the air inlet shell and the inner space of the air outlet shell are communicated to form the cavity together, the filter element is fixedly installed in the inner space of the air inlet shell, and the one-way valve is installed in the inner space of the air outlet shell.
4. The filler valve as recited in claim 3, further comprising: the air inlet casing have the inlet end and be used for with the installation end of the casing installation of giving vent to anger, the inlet end is equipped with the air inlet, the casing of giving vent to anger have give vent to anger the end and be used for with the installation end of the casing installation of giving vent to anger, the end of giving vent to anger is equipped with the gas outlet, the inner wall of the casing of admitting air is equipped with the orientation the first installation step of the installation end of the casing of admitting air, the roof of filter core is close to the air inlet and with the air inlet is corresponding, add the pneumatic valve still include the clamp plate thereby the casing of admitting air with give vent to anger under the casing fixed mounting's the state the clamp plate quilt the casing of giving vent to anger extrudees the.
5. The filler valve as recited in claim 4, further comprising: the air outlet shell is provided with an extrusion step facing the pressing plate, the outer wall in the middle of the pressing plate protrudes outwards from the outer walls at two ends of the pressing plate to form a first pressing plate step facing the filter element and a second pressing plate step facing the extrusion step and matched with the extrusion step.
6. The filler valve as recited in claim 5, further comprising: the utility model discloses a filter core, including the casing of giving vent to anger, the lateral wall of clamp plate one end with the inner wall cooperation of the casing of admitting air, and this pot head of clamp plate be equipped with first sealing washer with form sealedly between the inner wall of the casing of admitting air, first sealing washer is located first clamp plate step with between the installation wall of filter core, the lateral wall of the clamp plate other end with the inner wall cooperation of the casing of giving vent to anger, just this pot head of clamp plate is equipped with the second sealing washer and is in the clamp plate with form sealedly between the inner wall of the casing of giving vent to.
7. A dispensing valve according to claim 6, wherein: the inner wall of the end, provided with the air inlet, of the air inlet shell is provided with an annular air inlet sealing groove, an air inlet sealing ring is arranged in the air inlet sealing groove, the side wall, far away from the air inlet, of the air inlet protrudes inwards to be close to the side wall of the air inlet, and an air inlet step is formed.
8. The filler valve as recited in claim 4, further comprising: the check valve comprises a cylindrical valve sleeve fixed with the inner wall of the air outlet shell, a valve core and a bead-shaped part, wherein the valve core and the bead-shaped part are arranged in the valve sleeve and can move relative to the valve sleeve; one end, close to the pressure plate, of the valve sleeve is open, a valve sleeve opening allowing the valve core to penetrate through is formed in the other end of the valve sleeve, a valve sleeve first step facing the bead-shaped piece is further formed in one end, provided with the valve sleeve opening, of the valve sleeve, the side wall of the valve sleeve comprises a sealing portion capable of forming sealing fit with the bead-shaped piece and a channel portion provided with a long through hole extending along the length direction of the side wall, the long through hole extends to the end portion, provided with the valve sleeve opening, of the valve sleeve, and a ventilation opening is formed in the end wall of the end portion; the valve core comprises a sliding part and a passing part, the outer wall of the sliding part is in sliding fit with the inner wall of the valve sleeve, and one end of the passing part of the valve core passes through the valve sleeve opening of the valve sleeve; the gas adding valve further comprises a spring sleeved outside the passing part, the spring is located between the first step of the valve sleeve and the sliding part, and the ball-shaped part is located on one side of the sliding part of the valve core; when the valve is closed, the outer wall of the ball-shaped piece is matched with the inner wall of the sealing part of the valve sleeve to form a seal for gas, when gas is added, the gas pushes the ball-shaped piece to push the valve core to move towards the gas outlet direction by overcoming the spring force, when the ball-shaped piece is separated from being matched with the sealing part, the valve is opened, and the gas can enter the long through hole and reach the gas outlet through the ventilation opening.
9. The filler valve as recited in claim 8, further comprising: the inner wall of the air outlet shell is also provided with a sealing limit step towards the mounting end, a bead-shaped part sealing ring is arranged between the sealing limit step and the pressing plate, the inner diameter of the bead-shaped part sealing ring is smaller than the diameter of the bead-shaped part, and the bead-shaped part extrudes the bead-shaped part sealing ring until the bead-shaped part sealing ring is abutted against the pressing plate in a state that the valve is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110271594.XA CN113063006A (en) | 2021-03-12 | 2021-03-12 | Air-adding valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110271594.XA CN113063006A (en) | 2021-03-12 | 2021-03-12 | Air-adding valve |
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| CN113063006A true CN113063006A (en) | 2021-07-02 |
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| CN202110271594.XA Pending CN113063006A (en) | 2021-03-12 | 2021-03-12 | Air-adding valve |
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| CN110131450A (en) * | 2019-05-05 | 2019-08-16 | 万向钱潮股份有限公司 | A kind of check valve with damping action |
| CN112324957A (en) * | 2020-11-23 | 2021-02-05 | 江苏一控真空注胶技术有限公司 | One-way filter valve |
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2021
- 2021-03-12 CN CN202110271594.XA patent/CN113063006A/en active Pending
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|---|---|---|---|---|
| CN201037559Y (en) * | 2007-04-10 | 2008-03-19 | 上海清能燃料电池技术有限公司 | Valve for top opening type hydrogen storing bottle |
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