CN115111415A - Constant pressure valve structure - Google Patents

Abstract

The invention provides a constant pressure valve structure which comprises a constant pressure valve body, wherein a first cavity and a second cavity which are communicated with each other are arranged in the constant pressure valve body, a first pressure reducing valve and a second pressure reducing valve are respectively arranged in the first cavity and the second cavity, a control valve is further arranged at a communication part between the two cavities, the first pressure reducing valve and the second pressure reducing valve respectively comprise a piston, a piston seat and a pressure spring arranged between the piston and the piston seat, the two piston seats are respectively fixed at the openings at the two ends of the constant pressure valve body, the two pistons are symmetrically arranged relative to the control valve, and air outlet channels communicated with the two ends of the control valve are respectively arranged in the two pistons. This application passes through the two-stage decompression, can make pressure of admitting air follow high pressure to middling pressure to the low pressure again, and the pressure of admitting air that the effective split high-pressure gas cylinder produced makes the relative one-level relief pressure valve outlet pressure of pressure at terminal gas outlet more stable even to the speed that the wine was got in the messenger aerifys is more reliable and more stable.

Description

Constant pressure valve structure

Technical Field

The invention belongs to the technical field of constant pressure valves, and particularly relates to a constant pressure valve structure.

Background

At present, many liquid taking devices on the market realize the operation of replacing liquid in the bottle by injecting inert gas which does not react with the liquid in the bottle into the bottle, and simultaneously realize the preservation of the liquid in the bottle. The liquid taking device with the split pressure reducing valve has the conditions of complex structure, poor portability and poor use experience; the liquid device is got to integration of integrated relief pressure valve still generally need additionally set up the inflated trigger mechanism of control, the relief pressure valve structure is complicated relatively, be difficult to control pressure of giving vent to anger, all need control corresponding trigger mechanism to realize that inflatable opens or stops during the use and after using, experience also certain influence to using, this type of relief pressure valve generally only adopts one-level pressure reducing structure simultaneously, direct high-pressure gas through one-level pressure reducing structure with high-pressure gas cylinder reduces for aerifing the low-pressure gas who gets liquid, can lead to the unstable condition of pressure of giving vent to anger, and then make aerify the speed of getting liquid become unstable, influence use experience.

Disclosure of Invention

In order to solve among the prior art direct through one-level decompression structure with high-pressure gas of high-pressure gas cylinder reduce for aerifing the low-pressure gas who gets liquid, can lead to the unstable condition of pressure of giving vent to anger, and then make aerify the speed of getting liquid become unstable, influence a great deal of problems such as use experience, this application provides a constant pressure valve structure to solve above-mentioned technical defect problem.

The invention provides a constant pressure valve structure which comprises a constant pressure valve body, wherein a first cavity and a second cavity which are communicated with each other are arranged in the constant pressure valve body, a first pressure reducing valve and a second pressure reducing valve are respectively arranged in the first cavity and the second cavity, a control valve is further arranged at a communication part between the two cavities, the first pressure reducing valve and the second pressure reducing valve respectively comprise a piston, a piston seat and a pressure spring arranged between the piston and the piston seat, the two piston seats are respectively fixed at the openings at the two ends of the constant pressure valve body, the two pistons are symmetrically arranged relative to the control valve, and air outlet channels communicated with the two ends of the control valve are respectively arranged in the two pistons. Through the two-stage constant pressure valve structure, the air inlet pressure can be changed from high pressure to medium pressure to low pressure, and the pressure of the air outlet of the terminal is more stable and uniform relative to the outlet pressure of the primary valve.

In some specific embodiments, the communicating portion includes a protruding structure on the bottom surfaces of the first cavity and the second cavity, a cavity for accommodating the control valve is formed inside the protruding structure, and a communicating hole is formed in the bottom of the cavity to connect the first cavity and the second cavity. By means of the structure, a cavity structure for containing the control valve can be formed, and the control valve is convenient to assemble.

In some specific embodiments, the control valve includes a control valve seat, a valve core, a spring, and a sealing member, the control valve seat is fixedly disposed in the cavity of the protruding structure of the communicating portion, the spring and the valve core are disposed inside the control valve seat in a matching manner, the valve core can extend out from the communicating hole under the action of the spring or extend out into the second cavity through a through hole formed in an end face of the control valve seat, and the communication between the first cavity and the second cavity is blocked through the sealing matching between the valve core and the sealing member or the sealing matching between the valve core and the cavity inside the control valve seat. The two-stage pressure reducing valve cavity can be controlled to be communicated by means of the control valve, the control valve seat can be arranged on the bottom surface of the first cavity or the second cavity according to the arrangement of the connecting part, and different installing modes can correspond to different valve cores and sealing piece structures.

In some specific embodiments, the first pressure reducing valve includes a first piston, a first piston seat and a first pressure spring, the first piston seat is fixedly disposed at the opening of the first cavity, the first piston is sleeved in the internal cavity of the first piston seat, and the first pressure spring is disposed between the first piston seat and the first piston to press the first piston toward the bottom of the first cavity. The first pressure reducing valve of the structure is communicated with the gas cylinder, the first piston is pressed downwards under the action of gas pressure to block the puncture piece from being communicated with the gas cylinder, the first piston moves upwards under the action of the first pressure spring to recover the communication with the gas cylinder, the first piston continuously reciprocates to convert high-pressure gas of the gas cylinder into medium-pressure gas and transmit the medium-pressure gas to the second pressure reducing valve in the second cavity through the control valve.

In some specific embodiments, the bottom of the first piston is provided with a bottom protruding structure for accommodating the first cavity and a cavity structure for accommodating the control valve seat, the bottom of the cavity structure is provided with an air inlet hole, and the bottom of the air inlet hole is radially provided with a through hole penetrating through the upper part of the first piston. With this arrangement, an intake passage can be formed in the first piston.

In some specific embodiments, sealing rings are arranged between the lower part of the through hole of the upper part of the first piston and the inner wall of the inner cavity of the first piston seat, and between the lower part of the first piston and the inner wall of the first cavity. By virtue of this arrangement the first piston is able to maintain a seal with the first piston seat and the first chamber during its reciprocating action.

In some specific embodiments, the second pressure reducing valve includes a second piston, a second piston seat and a second pressure spring, the second piston seat is fixedly disposed at the opening of the second cavity, the second piston is sleeved in the inner cavity of the second piston seat, and the second pressure spring is disposed between the second piston seat and the second piston to press the second piston toward the bottom of the second cavity. After the second pressure reducing valve with the structure is communicated with an external part to be inflated, the second piston can reciprocate under the action of the second pressure spring to continuously press down the valve core of the control valve so as to obtain medium-pressure gas in the first cavity.

In some specific embodiments, a recessed structure for accommodating the bottom protruding structure of the second cavity is disposed at the bottom of the second piston, and an inclined hole is disposed in the recessed structure at a position away from the valve core and is communicated with the hollow opening at the upper portion of the second piston. By means of the structure, on the one hand, the internal channel of the second piston is staggered with the valve core of the control valve, and the situation that the valve core is directly matched with the through hole of the second piston to cause the air outlet channel to be blocked or the valve core to lose effect is avoided.

In some specific embodiments, a sealing ring is disposed between the upper portion of the second piston and the inner wall of the inner cavity of the second piston seat, and a sealing ring is disposed between the lower portion of the second piston and the inner wall of the second cavity. By virtue of this arrangement, the second piston is able to maintain a seal with the second piston seat and the second chamber during reciprocation.

In some specific embodiments, the gas cylinder further comprises a trigger switch and a gas cylinder connecting part, wherein the trigger switch is fixedly matched with the second piston seat and is used for being matched with the to-be-inflated member to trigger the conduction or the closing of the second pressure reducing valve and the to-be-inflated member; the gas cylinder connecting part comprises a gas cylinder fixing seat, a puncture piece and a gas cylinder sealing gasket, the gas cylinder fixing seat fixes the gas cylinder sealing gasket and the puncture piece on the first piston seat for connecting the gas cylinder, and the top of the first piston is provided with the sealing gasket for abutting against the sealed puncture piece.

By means of the arrangement, the pressure reducing structure can be hermetically connected with the gas cylinder, and the pressure reducing and gas charging operation is realized by matching the trigger switch with the to-be-charged member.

Compared with the prior art, the beneficial results of the invention are as follows:

through the second grade decompression structure of first relief pressure valve and second relief pressure valve in two cavities that set up in the constant pressure valve body in this application, when the gas cylinder assembles in the gas cylinder fixing base, high-pressure gas in the gas cylinder passes through first relief pressure valve and second relief pressure valve in proper order, make admission pressure follow high pressure to middling pressure low pressure again, the admission pressure that effective split high-pressure gas cylinder produced, make the pressure of terminal gas outlet compare in one-level relief pressure valve outlet pressure more stable even, thereby make aerify speed when getting wine more reliable and more stable. In addition, the spring stroke can be changed by adjusting the matching size of the piston seat and the second cavity, so that the air outlet pressure is changed, the structure is stable and reliable, and the triggering operation is simpler and more convenient.

Drawings

The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and together with the description serve to explain the principles of the invention. Other embodiments and many of the intended advantages of embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.

FIG. 1 is a schematic cross-sectional view of a constant pressure valve configuration according to an embodiment of the present invention;

fig. 2 is a cross-sectional schematic view of a constant pressure valve body according to a specific embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a first pressure relief valve according to one particular embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view of a second pressure relief valve according to a specific embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a constant pressure valve structure connecting cylinders according to a specific embodiment of the invention;

fig. 6 is a schematic sectional view of a constant pressure valve according to another embodiment of the present invention.

The meaning of each number in the figure: 100-trigger switch, 101-switch valve core, 200-constant pressure valve body, 201-first cavity, 202-second cavity, 203-bulge structure, 204-cavity connecting part, 205-annular bulge structure, 206-communicating hole, 207-connecting part cavity, 300-second pressure reducing valve, 301-second piston seat, 302-second pressure spring, 303-second piston, 3031-air outlet I, 3032-inclined hole, 3033-recess structure, 3034-middle bulge, 304-piston sealing ring I, 305-piston sealing ring II, 400-control valve, 401-valve core, 402-valve core sealing member, 403-valve core spring, 404-control valve seat, 500-first pressure reducing valve, 501-first piston seat, 502-first pressure spring, 503-first piston, 5031-air inlet hole I, 5032-air inlet hole II, 504-piercing part sealing gasket, 505-piston sealing ring III, 506-piston sealing gasket IV, 600-gas cylinder connecting part, 601-piercing part, 602-sealing gasket, 603-bottle opening fixing part and 700-gas cylinder.

Detailed Description

In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. In this regard, directional terminology, such as "top," "bottom," "left," "right," "up," "down," etc., is used with reference to the orientation of the figures being described. Because components of embodiments can be positioned in a number of different orientations, the directional terminology is used for purposes of illustration and is in no way limiting. It is to be understood that other embodiments may be utilized and logical changes may be made without departing from the scope of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.

The present invention provides a constant pressure valve structure, and fig. 1 shows a schematic cross-sectional view of a constant pressure valve structure according to an embodiment of the present invention, and as shown in fig. 1, the constant pressure valve structure includes a trigger switch 100, a constant pressure valve body 200, a first pressure reducing valve 500, a control valve 400, a second pressure reducing valve 300, and a cylinder connecting portion 600. First relief pressure valve 500 and second relief pressure valve 300 set up inside constant pressure valve body 200 and are connected through control valve 400, trigger switch 100 and the cooperation of second relief pressure valve 300, gas cylinder connecting portion 600 cooperates with first relief pressure valve 500, loops through first relief pressure valve 300 and the high-pressure gas of second relief pressure valve 500 to the gas cylinder and decompress for inlet pressure is from high pressure to middling pressure again to supporting the pressure, finally is gaseous to waiting to aerify the stable transmission low pressure of piece through trigger switch 100.

In a specific embodiment, fig. 2 shows a schematic cross-sectional view of a constant pressure valve body according to a specific embodiment of the present invention, as shown in fig. 2, the constant pressure valve body 200 is a hollow cylindrical structure, and includes a first cavity 201 and a second cavity 202 inside thereof, the first cavity 201 and the second cavity 202 are separated by a cavity connecting portion 204, the first cavity 201 is used for placing a first pressure reducing valve 500, the second cavity 202 is used for placing a second pressure reducing valve 300, a protruding structure 203 is arranged at the bottom of the second cavity 202 on the cavity connecting portion 204, an annular protrusion 205 is arranged at the bottom of the first cavity 201, the annular protrusion 205 and the inside of the protruding structure 203 form a connecting portion cavity 207 for accommodating the control valve 400, and a communication hole 206 is arranged at the bottom of the connecting portion cavity 207 for communicating the first cavity 201 and the second cavity 202.

In a specific embodiment, the control valve 400 includes a valve core 401, a valve core sealing member 402, a valve core spring 403 and a control valve seat 404, the control valve seat 404 is fixedly matched with the connecting portion cavity 207, and the valve core sealing member 402 is pressed to the bottom of the connecting portion cavity 207, the specific fixed matching manner can be fixedly connected in a thread matching manner, a cavity is arranged inside the control valve seat 404 for placing the valve core spring 403 and the valve core 401, an air inlet through hole is arranged at the bottom of the cavity, the valve core spring 403 presses the valve core 401 to the valve core sealing member 402, the upper portion of the valve core 401 extends out of the communicating hole 206 at the bottom of the second cavity 202, the diameter of the upper portion of the cylindrical structure of the valve core 401 is slightly smaller than the lower portion, and through conical surface transition, the conical surface can be abutted against a conical surface in a hole position in the middle of the valve core sealing member 206 to block the communicating hole 206 between the first cavity 201 and the second cavity 202, the diameter of the upper portion of the cylindrical structure of the valve core 401 is slightly smaller than the middle through hole of the valve core sealing member 206, so that gas can pass through the gap between the spool 401 and the spool seal 206 when the spool is not in sealing engagement with the spool seal.

With continuing reference to fig. 3, fig. 3 shows a schematic cross-sectional structure of a first pressure reducing valve according to a specific embodiment of the present invention, as shown in fig. 3, the first pressure reducing valve 500 includes a first piston seat 501, a first pressure spring 502 and a first piston 503, a head of the first piston seat 501 is fixedly disposed at a mouth of the first cavity 201, and may be coupled and mated by a threaded connection manner, the first piston seat 501 and the first piston 503 are both configured like a T, a tail of the first piston seat 501 is hollow, a tail end of the first piston 503 is inserted into the hollow structure at the tail of the first piston seat 501, and is sealed and mated with an inner wall of the hollow structure at the tail of the first piston seat 501 by a sealing ring III 506, a head of the first piston 503 is sealed and mated with an inner wall of the first cavity 201 by a sealing ring IV 505, the first pressure spring 502 is disposed between the first piston seat 501 and the first piston 503, for pressing the first piston 503 upward. The head of the first piston 503 is also provided with a recessed structure corresponding to the annular protrusion 205 at the bottom of the first cavity 201, and the recessed structure is also provided with a cavity corresponding to the control valve body 404, so as to prevent the first piston 503 from colliding with the control valve body 404 during reciprocating motion. An air inlet hole I5031 is formed in the bottom of the cavity, an air inlet hole II 5032 radially penetrates through the bottom of the air inlet hole I5031, the air inlet hole II 5032 is formed in the tail of the first piston 503 and in front of the sealing ring 506, and the diameter of the tail of the first piston 503 is slightly smaller than the inner diameter of the hollow structure in the tail of the first piston seat 501, so that external high-pressure air can enter the inner cavity of the first piston 503 through a gap between the air inlet hole II 5032 and the air inlet hole I5031. The end of the tail of the first piston 503 is provided with a piercing member sealing pad 504 for sealing the piercing member 601 when the inner cavity of the first piston 503 is pressed down by the air pressure to block the communication with the gas cylinder.

In a specific embodiment, the side wall of the first cavity 201 is provided with an exhaust hole 208, and the exhaust hole 208 may be hidden in an anti-slip concave structure outside the constant pressure valve body 200, or be covered and hidden at a threaded matching position of the gas cylinder outer cover and the constant pressure valve body 200. The exhaust hole 208 can exhaust air in the first cavity 201 between the first piston 503 and the first piston seat 501 when the first piston 503 reciprocates, so as to avoid that the first piston 503 can do work on a cavity at the upper part of the first cavity 201 when the first piston 503 reciprocates due to the closed opening of the first cavity 201, and the reciprocating motion of the first piston 503 is influenced.

With continuing reference to fig. 4, fig. 4 shows a schematic cross-sectional structure of a second pressure reducing valve according to a specific embodiment of the present invention, as shown in fig. 4, the second pressure reducing valve 300 includes a second piston seat 301, a second pressure spring 302 and a second piston 303, the second piston seat 301 is fixedly disposed at the mouth of the second cavity 202, and may be in connection and fit by way of screw connection, the second piston seat 301 and the second piston 303 are both configured like a T-shape, the second piston seat 301 is hollow inside, one end of the second piston 303 is inserted into the hollow structure inside the second piston seat 301 and is in sealing fit with the inner wall of the hollow structure inside the second piston seat 301 by a sealing ring I304, the other end is in sealing fit with the inner wall of the second cavity 202 by a sealing ring II 305, the second pressure spring 302 is disposed between the second piston seat 301 and the second piston 303, for pressing the second piston 303 downwards. The lower part of the second piston 303 has a recessed structure 3033, the recessed structure 3033 matches with the bottom raised structure 203 of the second chamber 202, and a middle raised structure 3034 is arranged in the middle of the recessed structure 3033 for abutting against the valve core 401 of the control valve 400 extending out of the bottom communication hole 206 of the second chamber 202. An air outlet hole 3031 and an inclined hole 3032 which are communicated are arranged in the second piston 303, the inclined hole 3032 can avoid the valve core 401 extending out of the communicating hole 206 at the bottom of the second cavity 202, so that the valve core 401 is prevented from blocking a pipeline in the second piston 303, and the arrangement of the concave structure 3033 and the middle bulge 3034 can prevent the inclined hole 3032 from being communicated with the communicating hole 206 when the second piston 303 is pressed to the bottom of the second cavity 202 by the second pressure spring 302, so that air cannot be discharged normally; the gas in the gas cylinder can be exhausted soon and the piston cannot be jacked up, so that residual pressure in the gas cylinder can be discharged. In some other embodiments, the inclined holes 3032 may also be arranged as a plurality of inclined holes with proper hole diameters distributed evenly on the circumference of the end face of the recessed structure 3033, so that the pressure is more balanced when conducting.

In a specific embodiment, a plurality of grooves are formed in the circumferential surface of the head of the second piston seat 301, so that when the second piston seat 301 is matched with the second cavity 202, the upper portion of the second cavity 202 can be communicated with the outside through the grooves to assist the second piston 303 to intake or exhaust in the reciprocating process, and the problem that the reciprocating motion of the second piston 303 is influenced because the upper portion of the second cavity 202 is sealed and the second piston 303 can do work on the cavity of the upper portion of the second cavity 202 during the reciprocating motion is avoided. The groove bodies can also be used as assembly clamping positions, so that the second piston seat 301 can be conveniently disassembled and assembled, and the compression stroke of the second pressure spring 302 can be finely adjusted by utilizing the groove bodies, so that the air outlet pressure is changed.

In a specific embodiment, the trigger switch 100 includes a switch valve core 101 and a switch body 102, a hollow conducting cavity is provided inside the switch body 102, the switch valve core 101 is movably disposed inside the conducting cavity inside the switch body 102, and the conducting of the conducting cavity can be blocked when the switch valve core 101 moves in the conducting cavity, the trigger switch 100 can be used as a switch for controlling on-off while being used as an air outlet structure, no additional operation control switch is needed during use, the air inflation operation is simplified, and the use is convenient. The switch valve core 101 of the trigger switch 100 extends out of the upper end surface of the switch body 102, an air outlet is formed in the upper end of the switch valve core 101, the upper portion of a conducting cavity in the switch body 102 is larger than the lower portion of the conducting cavity in diameter, the communicating portion of the upper portion and the lower portion of the conducting cavity is provided with the minimum aperture of the conducting cavity, and the minimum aperture of the conducting cavity is in transition connection with the lower portion of the conducting cavity through a conical surface. The switch valve core 101 is of a columnar structure, two annular protrusions are arranged on the circumferential surface of the upper portion of the switch valve core 101, and the size of the two annular protrusions is equal to the size of the diameter of the upper portion of the conducting cavity, so that the switch valve core 101 can stably move up and down in the conducting cavity and cannot shake. The annular groove formed between the two annular protrusions is used for placing a sealing ring to seal the upper part of the switch valve core 101 and the upper part of the conduction cavity. The lower portion of the switch valve core 101 has a size smaller than the minimum aperture of the conducting cavity, so that the lower portion of the switch valve core 101 can penetrate through the minimum aperture of the conducting cavity, gas can pass through a gap between the switch valve core and the conducting cavity, an annular groove is formed in the surface of the lower portion of the switch valve core 101 and used for placing a sealing ring, the size of the sealing ring is larger than the minimum aperture of the conducting cavity, and blocking of the minimum aperture of the conducting cavity can be achieved through matching of the sealing ring and a conical surface below the minimum aperture of the conducting cavity. A return spring is arranged below the two annular bulges, one end of the return spring is matched with the bottom surface of the upper part of the conducting cavity, the other end of the return spring is matched with the lower part of the two annular bulges of the switch valve core 101, and the switch valve core 101 is upwards jacked up to enable a sealing ring at the lower part of the switch valve core 101 to be always in a position for blocking the minimum aperture of the conducting cavity.

In a specific embodiment, the gas cylinder connecting portion 600 includes a piercing element 601, a sealing gasket 602, and a bottle mouth fixing element 603, the bottle mouth fixing element 603 is fixedly matched with the head cavity of the first piston seat 501, and specifically, is tightly matched in a threaded manner, and the sealing gasket 602 and the piercing element 601 are tightly pressed to the bottom surface of the head cavity, an air inlet channel is provided inside the piercing element 601, one end of the air inlet channel is used for piercing the gas cylinder to guide out high-pressure gas in the gas cylinder, and the other end of the air inlet channel extends out of the bottom surface of the internal hollow cavity at the tail of the first piston seat 501 and is matched with the piercing element sealing gasket 504 on the first piston 503, so as to realize on-off control of gas cylinder air inlet.

Fig. 6 is a schematic cross-sectional view showing a constant pressure valve according to another embodiment of the present invention, as shown in fig. 6, the embodiment shows a control valve 400 ' of another embodiment, a raised structure 203 ' is provided on a bottom surface of a first cavity 201 of a constant pressure valve body 200, a control valve assembly cavity is provided inside the raised structure 203 ', a mouth of the control valve assembly cavity is opened on a bottom surface of a second cavity 202, a communication hole communicated with the first cavity 201 is further provided on the raised structure 203 ', a control valve seat 404 ' of the control valve 400 ' is mounted on the control valve assembly cavity on the bottom surface of the second cavity 202, in a specific embodiment, an inner wall of the control valve assembly cavity is provided with an internal thread structure, the control valve seat 404 ' is a T-shaped structure with a hollow interior, an outer surface of a bottom is provided with a corresponding external thread structure, and a through hole connected with the hollow interior structure is provided in a center of the head, the head is provided with a plurality of positioning grooves in the circumferential direction, so that screwing matching of corresponding tools is facilitated, and a sealing ring is arranged below the head to keep sealing when the head and the head are matched. The valve core 401 'and the spring 403' are arranged inside the hollow structure of the control valve seat 404 ', the upper part of the valve core 401' passes through the through hole in the center of the head of the control valve seat 404 'and extends out of the surface of the head of the control valve seat 404' to be matched with the middle bulge 3034 below the second piston 303 (refer to the previous embodiment), the hollow structure of the control valve seat 404 'is in transition connection with the through hole in the center of the head through a conical surface, the upper section of the valve core 401' is provided with a transverse outer edge larger than the through hole, and a sealing ring is arranged above the transverse outer edge and is used for being matched with the conical surface to realize the sealing between the first cavity 201 and the second cavity 202. The spring 403 'is disposed at the bottom of the control valve assembly cavity below the lateral outer edge, and is used for jacking the valve core 401' towards the second cavity 202 so that the sealing ring is matched with the conical surface to block the conduction of the first cavity and the second cavity. The lower portion of the valve core 401 ' passes through the communication hole at the bottom of the control valve assembly chamber, and the lower portion of the valve core 401 ' has a size smaller than the inner diameter of the communication hole, whereby an intake passage can be formed by means of a gap between the lower portion of the valve core 401 ' and the communication hole.

In a specific embodiment, the head of the protruding structure 203 'is provided with a tapered surface, a tapered surface corresponding to the tapered surface is correspondingly provided in the head cavity of the first piston 503, and a vent groove 5033 is formed on the tapered surface of the head cavity of the first piston 503 to prevent the first pressure reducing valve 500 from failing due to the fact that gas cannot enter the cavity between the first piston 503 and the first cavity 201 when the tapered surface of the head of the protruding structure 203' is attached to the tapered surface of the head cavity of the first piston 503.

In a specific embodiment, different from the previous embodiment, in this embodiment, the protrusion 507 for engaging with the sealing pad 504 of the puncturing element is directly disposed on the bottom surface of the rear cavity of the first piston seat 501, compared with the protrusion disposed on the puncturing element, the detachment in this embodiment is more stable and reliable, and it can be avoided that the puncturing element may shake when piercing the gas cylinder to cause the protrusion engaged with the sealing pad 504 of the puncturing element to shift, so that the sealing pad 504 of the puncturing element cannot seal the puncturing element well, and further the normal operation of the first pressure reducing valve 500 is affected.

Fig. 5 shows a schematic cross-sectional view of a constant pressure valve structure for connecting gas cylinders according to a specific embodiment of the present invention, the principle of which is explained in conjunction with the above-mentioned drawings and fig. 5 as follows: on the basis of the constant pressure valve structure, the opening of the gas cylinder 700 is tightly matched with the opening fixing piece 603 and sealed by the sealing gasket 602, the puncturing piece 601 punctures the plug of the gas cylinder 700, high-pressure gas in the gas cylinder 700 passes through the through hole in the puncturing piece 601, the gas inlet hole II 5032 at the tail part of the first piston 503 and the gas inlet hole I5031 in sequence and instantly enters the cavity at the head part of the first piston 503, and the high-pressure gas generates certain pressure in the cavity to push the first piston 503 to move downwards and enable the puncturing piece sealing gasket 504 arranged at the tail end to seal the puncturing piece 601, so that the high-pressure gas in the gas cylinder 700 is blocked. The pressure of the gas generated in the cavity in the process is usually adjusted to a proper range by adding the pressure of the first pressure spring 502, and the resultant of the two forces constitutes the inlet pressure of the cavity of the first piston 503 to the control valve 400 and output to the second pressure reducing valve. After the high-pressure gas is lost, the first piston 503 moves upwards under the action of the first pressure spring 502, the sealing of the puncture piece sealing gasket 504 on the puncture piece 601 is released, the gas supply of the gas cylinder 700 is recovered, the above state is repeated, and part of the gas in the cavity of the head of the first piston 503 enters the second reducing valve 300 through the control valve 400. The valve core 401 is pressed on the conical surface structure of the valve core sealing piece 402 under the action of the spring 403, the top end of the valve core 401 passes through the communication hole 206 between the first cavity 201 and the second cavity 202 and is exposed out of the bottom surface of the second cavity 202, the second pressure spring 302 in the second cavity 202 presses the second piston 303 downwards, the bottom of the second piston 303 transmits the pressing force to force the valve core 401 to descend, the air passage is unsealed, at the moment, part of compressed air in the first piston 503 is sprayed into the second cavity 202 to jack up the second piston 303 (at the moment, the trigger switch 100 is in a closed state), when the trigger switch 100 is matched with a to-be-inflated piece to open the air outlet passage, the air is led out through the air outlet passage, the internal air pressure 303 is reduced, at the moment, the second piston reciprocates, namely, the second piston 303 continuously presses down the valve core 401 to realize air deflation, and is pressed down by the second pressure spring 302 after being jacked up by the compressed air, the realization is given vent to anger continuously, and the compressive force of second pressure spring 302 can regard as the regulation of control pressure of giving vent to anger, and consequently the accessible rotates second piston seat 301 and adjusts the compression stroke of second pressure spring 302 and carry out fine setting control to pressure of giving vent to anger, relies on this structure setting of fine setting control pressure of giving vent to anger, can control pressure of giving vent to anger, in the liquid operation is got in aerifing of grape wine, can be as required to adding the gas pressure in the beverage bottle to can control the velocity of flow of wine. The constant pressure valve structure of this application passes through two-stage decompression structure, makes admission pressure reach the pressure of supporting again from high pressure to middling pressure, and the admission pressure that the high-pressure gas cylinder produced is effectively torn open for the pressure of terminal gas outlet is more stable even than in one-level relief pressure valve outlet pressure, thereby makes to aerify the speed when getting wine more reliable and more stable.

It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present invention without departing from the spirit and scope of the invention. In this way, if these modifications and changes are within the scope of the claims of the present invention and their equivalents, the present invention is also intended to cover these modifications and changes. The word "comprising" does not exclude the presence of other elements or steps than those listed in a claim. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims shall not be construed as limiting the scope.

Claims (10)

1. The utility model provides a constant pressure valve structure, a serial communication port, including the constant pressure valve body, the inside first cavity and the second cavity that sets up two mutual intercommunications of constant pressure valve body, first cavity with be provided with first relief pressure valve and second relief pressure valve in the second cavity respectively to intercommunication portion between two cavitys still is provided with the control valve, first relief pressure valve with the second relief pressure valve all include piston, piston seat and set up in the piston with compression spring between the piston seat, two the piston seat is fixed in respectively the both ends oral area of constant pressure valve body, two the piston is about the control valve symmetry set up and wherein be provided with respectively with the outlet channel of control valve both ends intercommunication.

2. The constant pressure valve structure according to claim 1, wherein the communicating portion comprises a protruding structure on the bottom surface of the first cavity and/or the second cavity, a cavity for accommodating the control valve is arranged inside the protruding structure, and a communicating hole is arranged at the bottom of the cavity to connect the first cavity and the second cavity.

3. The constant pressure valve structure according to claim 2, wherein the control valve includes a control valve seat, a valve core, a spring, and a sealing member, the control valve seat is fixedly disposed in the cavity of the protruding structure of the communicating portion, the spring and the valve core are disposed in the control valve seat in a matching manner, the valve core can extend out from the communicating hole under the action of the spring or extend into the second cavity through a through hole formed in an end surface of the control valve seat, and the communication between the first cavity and the second cavity is blocked through a sealing fit between the valve core and the sealing member or through a sealing fit between the valve core and the cavity in the control valve seat.

4. The constant pressure valve structure according to claim 3, wherein the first pressure reducing valve includes a first piston, a first piston seat and a first pressure spring, the first piston seat is fixedly disposed at the opening of the first cavity, the first piston is sleeved on the inner cavity of the first piston seat, and the first pressure spring is disposed between the first piston seat and the first piston to press the first piston against the bottom of the first cavity.

5. The constant pressure valve structure according to claim 4, wherein the bottom of the first piston is provided with a cavity structure for accommodating the bottom protrusion structure of the first cavity and the control valve seat, the bottom of the cavity structure is provided with an air inlet, and the bottom of the air inlet on the first piston is radially provided with a through hole penetrating through the upper part of the first piston.

6. The constant pressure valve structure according to claim 5, wherein sealing rings are disposed between the lower portion of the through hole of the upper portion of the first piston and the inner wall of the inner cavity of the first piston seat, and between the lower portion of the first piston and the inner wall of the first cavity.

7. The constant pressure valve structure according to claim 4, wherein the second pressure reducing valve includes a second piston, a second piston seat and a second pressure spring, the second piston seat is fixedly disposed at the opening of the second cavity, the second piston is sleeved on the inner cavity of the second piston seat, and the second pressure spring is disposed between the second piston seat and the second piston to press the second piston against the bottom of the second cavity.

8. The constant pressure valve structure according to claim 7, wherein a recessed structure for accommodating the bottom protruding structure of the second cavity is disposed at the bottom of the second piston, and an inclined hole is disposed in the recessed structure at a position away from the valve core and is communicated with the hollow opening at the upper portion of the second piston.

9. The constant pressure valve structure according to claim 7, wherein a sealing ring is disposed between the upper portion of the second piston and the inner wall of the inner cavity of the second piston seat, and between the lower portion of the second piston and the inner wall of the second cavity.

10. The constant pressure valve structure according to claim 7, further comprising a trigger switch and a gas cylinder connecting part, wherein the trigger switch is fixedly matched with the second piston seat and is used for being matched with a to-be-inflated member to trigger the second pressure reducing valve to be communicated with or closed from the to-be-inflated member; the gas cylinder connecting part comprises a gas cylinder fixing seat, a puncture piece and a gas cylinder sealing gasket, the gas cylinder fixing seat is used for fixing the gas cylinder sealing gasket and the puncture piece on the first piston seat and used for connecting a gas cylinder, and the top of the first piston is provided with a sealing gasket used for abutting against and pressing the puncture piece.

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