Liquefied petroleum gas straight valve

Abstract

The liquefied petroleum gas straight valve comprises a main valve body, an upper valve cavity, a lower valve cavity, an electronic tag, an upper valve port, a lower valve port, an auxiliary valve body, an upper valve element assembly and a lower valve element assembly, the lower valve element assembly comprises a lower valve rod, a piston sleeve and a lower valve seat, and a flow guide cavity is formed in the lower valve seat; the lower portion of the lower valve rod can penetrate through the flow guide cavity and stretch out towards the lower valve port, a piston sleeve is arranged on the lower valve rod, an annular clamping table is arranged at the top end of the lower valve rod, and an annular clamping groove is formed between the annular clamping table and the piston sleeve. A side valve body is arranged on one side of the main valve body, a side valve cavity is formed in the side valve body, a driving ring is arranged in the side valve cavity and provided with a locking boss capable of being inserted into the annular clamping groove in a linkage mode, a locking control device driving the driving ring to stretch into the main valve cavity is arranged outside the side valve body, and the locking control device is in communication connection with the electronic tag. The auxiliary valve body is provided with a side valve port, the outer diameter of the sealing ball is larger than the inner diameter of the side valve port and the inner diameter of the flow guide cavity, and the inner diameter of the lower valve port is larger than the inner diameter of the flow guide cavity and the outer diameter of the sealing ring.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquefied petroleum gas supporting valve equipment technical field, especially in kind liquefied petroleum gas direct valve. BACKGROUND

[0002] As a common fuel, liquefied petroleum gas has entered people's life rapidly with its convenience, speed and cleanliness and has brought people a lot of convenience.

[0003] Some unscrupulous vendors will purchase liquefied petroleum gas and implement secondary gas inversion by inverting the liquefied petroleum gas cylinder to sell the liquefied petroleum gas again by adulterating and to obtain illegal profits.

[0004] Therefore, how to prevent the illegal gas inversion by inverting the liquefied petroleum gas cylinder to improve the storage, transportation and use safety of the liquefied petroleum gas cylinder is an important technical problem to be solved by those skilled in the art. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a liquefied petroleum gas direct valve which can effectively prevent the illegal gas inversion by inverting the liquefied petroleum gas cylinder to improve the storage, transportation and use safety of the liquefied petroleum gas cylinder.

[0006] To solve the above technical problem, the utility model provides a liquefied petroleum gas direct valve which comprises a main valve body with an upper valve chamber and a lower valve chamber coaxially communicated from top to bottom, the upper valve chamber and the lower valve chamber are communicated to form a main valve chamber, an electronic tag is arranged on the outside of the main valve body, the top end of the main valve body is provided with an upper valve port communicated with the main valve chamber, the bottom end of the main valve body is provided with a lower valve port communicated with the main valve chamber, and a secondary valve body is arranged below the main valve body and connected with the lower valve port in position.

[0007] An upper valve core assembly is arranged in the main valve chamber, a lower valve core assembly is arranged in the lower valve chamber, the upper valve core assembly is arranged below the upper valve port and adapted to open and close the upper valve port, the lower valve core assembly comprises a lower valve rod, a piston sleeve and a lower valve seat coaxially arranged, the lower valve seat is fixedly arranged in the lower valve chamber, and a flow guide cavity is arranged in the middle of the lower valve seat along the axial direction.

[0008] The lower valve rod is capable of axial reciprocating lifting movement, so that the lower part of the lower valve rod can pass through the flow guide cavity and extend towards the lower valve port, a piston sleeve capable of abutting against the top end of the inner annular wall of the flow guide cavity to close the flow guide cavity is movably arranged on the middle part of the outer wall of the lower valve rod, and an annular clamping table protruding from the top end of the outer wall of the lower valve rod is capable of gap fitting with the piston sleeve in the axial direction to form an annular clamping groove on the outer circumferential part of the lower valve rod.

[0009] One side of the main valve body is provided with a side valve body, the inside of the side valve body has a side valve cavity communicating with the side part of the main valve cavity, a driving ring is movably arranged in the side valve cavity, the free end of the driving ring is movably arranged with a locking boss capable of being inserted into the annular clamping groove in the radial direction, and the outside of the side valve body is provided with a locking control device capable of driving the driving ring to reciprocate in the radial direction of the main valve cavity to extend into the main valve cavity, and the locking control device is in communication connection with the electronic tag.

[0010] The inside of the auxiliary valve body has an auxiliary valve cavity communicating below the lower valve port, a sealing ball is movably arranged in the auxiliary valve cavity, a side valve port communicating between the auxiliary valve cavity and the liquefied petroleum gas cylinder is formed in the side wall of the auxiliary valve body, the outer diameter of the sealing ball is greater than the inner diameter of the side valve port and the inner diameter of the flow guide cavity respectively, and the inner diameter of the lower valve port is greater than the inner diameter of the flow guide cavity and the outer diameter of the sealing ball respectively.

[0011] Preferably, the upper valve core assembly comprises an upper valve rod and an upper valve seat fixedly arranged in the upper valve cavity, the middle part of the upper valve seat is provided with an upper valve hole in the axial direction, and the lower part of the upper valve rod has a guide rod section inserted into the upper valve hole from top to bottom.

[0012] An upper air blocking boss capable of abutting against and closing the bottom port of the upper valve port is protrudingly arranged on the upper part of the outer wall of the upper valve rod, the upper valve core assembly further comprises an upper valve core driving device and an upper valve core resetting device in communication connection with the electronic tag respectively, the upper valve rod is capable of moving from top to bottom under the driving of air flow and / or the upper valve core driving device, and the upper valve rod is capable of moving from bottom to top under the driving of air flow and / or the upper valve core resetting device.

[0013] Preferably, the upper part of the upper valve hole has a larger inner diameter than the lower part of the upper valve hole, and the upper valve core assembly further comprises an upper valve core step surface at the joint between the upper part of the inner wall of the upper valve hole and the lower part of the inner wall of the upper valve hole, the upper valve core resetting device is an upper resetting spring axially clamped between the upper valve core step surface and the upper air blocking boss, and the upper resetting spring is coaxially sleeved on the outer circumferential part of the upper valve rod.

[0014] Preferably, the upper valve core driving device is a magnetic sensing driving mechanism adapted to be in communication connection with the electronic tag.

[0015] Preferably, a bearing member is arranged in the auxiliary valve cavity to bear the sealing ball, and the top end of the sealing ball is below the top inner wall of the side valve port when the sealing ball is on the bearing member.

[0016] Preferably, the bearing member is a support spring arranged along the radial direction of the auxiliary valve body, and the outer diameter of the support spring decreases from the middle to the two ends.

[0017] Preferably, the bottom of the auxiliary valve cavity is sealed by a bottom plug, and the bottom plug is threadedly connected with the auxiliary valve body.

[0018] Preferably, a lower return spring is embedded between the top end of the lower valve seat and the piston sleeve, and the lower return spring is coaxially sleeved on the outer circumferential part of the lower valve rod.

[0019] Preferably, an iron core extending from the outside to the inside along the radial direction of the main valve cavity is embedded in the side valve cavity, the drive ring is sleeved on the inner end part of the iron core, and the locking control device is a magnetic sensing driving mechanism adapted to the electromagnetic coupling of the drive ring.

[0020] Preferably, an inner return clamping table is protrusively arranged on the inner end part of the inner wall of the side valve cavity, an outer return clamping table is protrusively arranged on the outer circumferential wall of the outer end part of the drive ring, a locking return spring is coaxially sleeved on the outer circumferential part of the drive ring, and the two ends of the locking return spring respectively abut against the inner return clamping table and the outer return clamping table.

[0021] Relative to the above background art, the liquefied petroleum gas direct valve provided by the utility model, in the working process, under the conventional gas working condition, the liquefied petroleum gas bottle is communicated with the side valve port, the liquefied petroleum gas in the liquefied petroleum gas bottle flows through the side valve port, the auxiliary valve cavity, the lower valve port, the lower valve cavity and the upper valve cavity in turn, and is discharged through the upper valve port and delivered to the downstream gas equipment. Under the conventional non-gas working condition, if the liquefied petroleum gas bottle is filled through the liquefied petroleum gas direct valve under the unauthorized state, the illegal filling gas flow passing through the upper valve port will form an axial downward pressure on the lower valve rod and the piston sleeve, so that the piston sleeve abuts against the inner ring wall of the flow guide cavity to close the flow guide cavity, thereby blocking the liquefied petroleum gas passage in the liquefied petroleum gas direct valve, so as to avoid the external gas from being introduced into the liquefied petroleum gas bottle to achieve the purpose of illegal filling; if the authorized filling is implemented, after the electronic tag authentication, the locking control device can be started through the communication connection, the locking control device drives the driving ring to move towards the inside of the main valve cavity, until the free end of the driving ring is inserted into the annular clamping groove and clamped in place, at this time, the axial limiting locking of the lower valve rod can be formed through the plug-in connection between the driving ring and the annular clamping groove, so that the lower valve rod can remain in the current position, avoiding the lower valve rod from moving downward due to the pressure of the gas flow introduced downward through the upper valve port, thereby avoiding the piston sleeve from abutting against the inner ring wall of the flow guide cavity, so as to ensure the communication of the gas flow path of each cavity in the main valve body, so that the liquefied petroleum gas introduced through the upper valve port can smoothly pass through the upper valve cavity, the lower valve cavity, the lower valve port, the auxiliary valve cavity in turn, and then be introduced into the liquefied petroleum gas bottle through the side valve port, so as to complete the conventional authorized filling operation.When it is necessary to discharge the residual liquid in the liquefied petroleum gas cylinder, that is, the "residual liquid" operation, the liquefied petroleum gas cylinder is connected to the liquefied petroleum gas direct valve and inverted, if the implemented is a normal residual liquid treatment, then the authorization authentication can be completed through the electronic tag, and the locking control device is started by communication connection, so that the locking control device drives the driving ring to move towards the inside of the main valve cavity, until the free end of the driving ring is inserted into the annular clamping groove and clamped in place, at this time, the driving ring and the annular clamping groove are inserted and connected, which can form axial limiting locking to the lower valve rod, so that the lower valve rod remains in the current working position, and the bottom end of the lower valve rod remains in the state of extending out of the lower valve port, so that the sealing ball cannot be completely positioned and fitted with the inner end of the lower valve port, thereby avoiding the sealing ball closing the lower valve port, thereby ensuring smooth communication of the chambers in the main valve body, so that the residual liquid in the liquefied petroleum gas cylinder can be discharged through the upper valve port after passing through the chambers in the liquefied petroleum gas direct valve; if the liquefied petroleum gas cylinder and the liquefied petroleum gas direct valve are inverted together, and the authentication is not completed through the electronic tag, then the driving ring cannot be inserted and connected with the annular clamping groove, so that the lower valve rod does not have any axial limiting locking, and thus the lower valve rod can move downward under the action of gravity, so that the end of the lower valve rod is retracted into the lower valve port, so that there is no protruding part at the lower valve port, and thus the sealing ball cannot be blocked, so that the sealing ball can roll to the position of the inner end of the lower valve port and completely close the lower valve port, thereby effectively preventing the residual liquid in the liquefied petroleum gas cylinder from being discharged through the liquefied petroleum gas direct valve, thereby preventing illegal residual liquid from being implemented by personnel who cannot realize electronic tag authentication, thereby significantly improving the storage, transportation and use safety of the liquefied petroleum gas cylinder.

[0022] In another preferred embodiment of this utility model, the upper valve core assembly includes an upper valve stem and an upper valve seat fixedly disposed in the upper valve cavity. The upper valve seat has an upper valve hole extending axially through its middle portion. The lower part of the upper valve stem has a guide rod section inserted into the upper valve hole from top to bottom. An upper air-blocking boss protrudes from the upper outer wall of the upper valve stem and is capable of abutting against and sealing the bottom port of the upper valve port. The upper valve core assembly also includes an upper valve core driving device and an upper valve core resetting device. The upper valve stem can move from top to bottom under the drive of airflow and / or the upper valve core driving device, and the upper valve stem can move from bottom to top under the drive of airflow and / or the upper valve core resetting device. Under normal gas usage conditions, after the electronic tag completes authorization and authentication, the upper valve core drive device moves the upper valve stem axially downward, creating a gap between the upper gas-blocking protrusion and the upper valve port that allows gas flow. This allows the liquefied petroleum gas (LPG) in the LPG cylinder to pass through the internal chambers of the LPG straight valve and then be discharged through the upper valve port. After normal authorized gas usage is completed, the upper valve core reset device moves the upper valve stem axially upward and resets it, ensuring that the upper gas-blocking protrusion is reliably aligned and abuts against the bottom end of the upper valve port. This ensures a reliable seal at the upper valve port, preventing LPG leakage and ensuring the safety of LPG cylinder storage and transportation when not in use. If the electronic tag has not completed authorization and authentication, the upper gas-blocking protrusion remains in contact with and sealed against the upper valve port. This ensures that the passage at the upper valve port is blocked during illegal gas usage and illegal waste disposal operations, further preventing unauthorized gas usage and illegal waste disposal, thereby further improving the safety of LPG cylinder use and storage and transportation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A cross-sectional view of the assembly structure of the liquefied petroleum gas straight valve and matching liquefied petroleum gas cylinder provided in a specific embodiment of this utility model under normal gas usage conditions.

[0025] Figure 2 for Figure 1 A cross-sectional view of the component structure of a liquefied petroleum gas straight valve in an unauthorized filling state;

[0026] Figure 3 for Figure 1 A cross-sectional view of the component structure of a liquefied petroleum gas straight valve under authorized filling conditions;

[0027] Figure 4 For Figure 1 The middle liquefied petroleum gas direct valve and the matched liquefied petroleum gas bottle in the authorized state are assembled in the inverted structure of the front view of the section.

[0028] Figure 5 For Figure 1 The middle liquefied petroleum gas direct valve and the matched liquefied petroleum gas bottle in the unauthorized state are assembled in the inverted structure of the front view of the section.

[0029] Wherein:

[0030] 10-main valve body;101-upper valve cavity;102-lower valve cavity;103-electronic tag;104-upper valve port;105-lower valve port;

[0031] 11-vice valve body;111-vice valve cavity;112-sealing ball;113-side valve port;114-support spring;115-bottom plug;

[0032] 12-upper valve core assembly;121-upper valve rod;122-upper valve seat;123-upper valve hole;124-upper gas resistance boss;125-upper valve core step surface;126-upper reset spring;

[0033] 13-lower valve core assembly;131-lower valve rod;132-piston sleeve;133-lower valve seat;134-flow guide cavity;135-annular clamping table;136-annular clamping groove;137-lower reset spring;

[0034] 14-side valve body;141-side valve cavity;142-driving ring;1421-positioning slot;1422-outer reset clamping table;143-locking boss;144-locking control device;145-iron core;146-inner reset clamping table;147-locking reset spring;

[0035] 20-liquefied petroleum gas bottle. DETAILED DESCRIPTION

[0036] The core of the utility model is to provide a liquefied petroleum gas direct valve, which can effectively prevent the illegal gas inversion condition from occurring by inverting the liquefied petroleum gas bottle, so as to improve the storage, transportation and use safety of the liquefied petroleum gas bottle.

[0037] In order to make the person in the prior art better understand the utility model scheme, the utility model is further explained in detail below in combination with the drawings and specific embodiments.

[0038] It needs to be explained in advance that in the utility model, unless there is definite stipulation and limitation, the terms "mount", "connect", "fix", and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0039] In addition, in the utility model, unless there is definite stipulation and limitation, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them.

[0040] In addition, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature. The orientation or positional relationship indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0041] Please refer to Figures 1 to 5 .

[0042] In the specific embodiment, the liquefied petroleum gas direct valve provided by the utility model, including the main valve body 10 with the upper valve cavity 101 and the lower valve cavity 102 coaxially communicated from top to bottom inside, the upper valve cavity 101 and the lower valve cavity 102 are communicated to form a main valve cavity, the outer part of the main valve body 10 is provided with an electronic tag 103, the top end of the main valve body 10 has an upper valve port 104 communicated with the main valve cavity, the bottom end of the main valve body 10 has a lower valve port 105 communicated with the main valve cavity, and the lower part of the main valve body 10 is further provided with a secondary valve body 11 connected with the lower valve port 105 in position.

[0043] An upper valve core assembly 12 is arranged in the main valve chamber, and a lower valve core assembly 13 is arranged in the lower valve chamber 102. The upper valve core assembly 12 is positioned below the upper valve port 104 and is adapted to switch on and off with the upper valve port 104. The lower valve core assembly 13 includes a lower valve rod 131, a piston sleeve 132, and a lower valve seat 133 arranged coaxially. The lower valve seat 133 is fixedly installed in the lower valve chamber 102, and the middle part of the lower valve seat 133 has a guide cavity 134 arranged axially.

[0044] The lower valve stem 131 can reciprocate up and down along the axial direction so that the lower part of the lower valve stem 131 can pass through the guide cavity 134 and extend toward the lower valve port 105. A piston sleeve 132 is sleeved on the outer wall of the middle part of the lower valve stem 131 so as to abut against the top of the inner ring wall of the guide cavity 134 to close the guide cavity 134. An annular retaining platform 135 is protruding on the outer wall of the top of the lower valve stem 131. The annular retaining platform 135 and the piston sleeve 132 are axially clearance-fitted to form an annular groove 136 on the outer periphery of the lower valve stem 131.

[0045] A side valve body 14 is provided on one side of the main valve body 10. The side valve body 14 has a side valve cavity 141 that communicates with the side of the main valve cavity. A drive ring 142 is movably arranged in the side valve cavity 141. The free end of the drive ring 142 is linked to a locking boss 143 that can be inserted into the annular slot 136 in a radial alignment. A locking control device 144 is provided on the outside of the side valve body 14 that can drive the drive ring 142 to reciprocate in a radial direction along the main valve cavity to extend into the main valve cavity. The locking control device 144 is communicatively connected to the electronic tag 103.

[0046] The interior of the secondary valve body 11 has a secondary valve chamber 111 connected to the lower valve port 105. A sealing ball 112 is rolled inside the secondary valve chamber 111. A side valve port 113 is opened on the side wall of the secondary valve body 11, connecting the secondary valve chamber 111 and the liquefied petroleum gas cylinder 20. The outer diameter of the sealing ball 112 is larger than the inner diameter of the side valve port 113 and the inner diameter of the guide cavity 134, respectively. The inner diameter of the lower valve port 105 is larger than the inner diameter of the guide cavity 134 and the outer diameter of the sealing ball 112, respectively.

[0047] During its operation, such as Figure 1 As shown, under normal gas usage conditions, the liquefied petroleum gas cylinder 20 is connected to the side valve port 113. The liquefied petroleum gas in the liquefied petroleum gas cylinder 20 flows sequentially through the side valve port 113, the auxiliary valve chamber 111, the lower valve port 105, the lower valve chamber 102, and the upper valve chamber 101, and is then discharged through the upper valve port 104 and transported to the downstream gas-using equipment.

[0048] Under normal non-gas-consuming operating conditions, such as Figure 2As shown, if the liquefied petroleum gas cylinder 20 is to be filled without authorization via the liquefied petroleum gas straight valve, the illegal filling gas flow through the upper valve port 104 will exert axial downward pressure on the lower valve stem 131 and piston sleeve 132, causing the piston sleeve 132 to abut against the inner ring wall of the guide cavity 134, thereby sealing the guide cavity 134 and blocking the liquefied petroleum gas passage inside the liquefied petroleum gas straight valve, thus preventing external gas from entering the liquefied petroleum gas cylinder 20 to achieve the purpose of illegal filling.

[0049] However, to carry out legitimate authorized filling, it is as follows: Figure 3 As shown, after authentication via electronic tag 103, the locking control device 144 is activated via communication connection. This causes the locking control device 144 to move the drive ring 142 towards the interior of the main valve chamber until the free end of the drive ring 142 aligns and inserts into the annular slot 136 and engages. At this point, the insertion connection between the drive ring 142 and the annular slot 136 creates an axial limit lock on the lower valve stem 131, thus maintaining the lower valve stem 131 in its current position and preventing it from slacking off. 31 moves downward due to the pressure of the airflow entering downward at the upper valve port 104, thereby preventing the piston sleeve 132 from abutting against the inner ring wall of the guide cavity 134, thus ensuring the smooth flow of airflow in each chamber inside the main valve body 10. This allows the liquefied petroleum gas entering through the upper valve port 104 to smoothly pass through the upper valve cavity 101, lower valve cavity 102, lower valve port 105, and auxiliary valve cavity 111 in sequence, and then enter the liquefied petroleum gas cylinder 20 through the side valve port 113, thereby completing the conventional authorized filling operation.

[0050] When it is necessary to discharge the residual liquid in the liquefied petroleum gas cylinder 20, i.e., to perform a "residual liquid discharge" operation, the liquefied petroleum gas cylinder 20 connected to the liquefied petroleum gas direct valve must be inverted. If the residual liquid discharge operation is performed in a standard manner, then... Figure 4 As shown, after authorization and authentication are completed via electronic tag 103, the locking control device 144 is activated via communication connection. This causes the locking control device 144 to drive the drive ring 142 to move toward the interior of the main valve chamber until the free end of the drive ring 142 is aligned and inserted into the annular slot 136 and locked in place. At this time, the insertion connection between the drive ring 142 and the annular slot 136 forms an axial limit lock on the lower valve stem 131, so that the lower valve stem 131 maintains its current working position and the bottom end of the lower valve stem 131 remains protruding from the lower valve port 105. This prevents the sealing ball 112 from being completely aligned and fitted with the inner end of the lower valve port 105, thereby preventing the sealing ball 112 from sealing the lower valve port 105. This ensures smooth conduction of each chamber inside the main valve body 10, so that the residual liquid in the liquefied petroleum gas cylinder 20 can pass through each chamber inside the liquefied petroleum gas straight valve and be discharged through the upper valve port 104.

[0051] If the liquefied petroleum gas cylinder 20 and the liquefied petroleum gas direct valve are inverted together, and authentication is not completed through electronic tag 103, then as follows: Figure 5 As shown, the drive ring 142 cannot be inserted into the annular slot 136, so the lower valve stem 131 does not have any axial limiting lock. Therefore, the lower valve stem 131 can move downward under its own weight, causing the end of the lower valve stem 131 to retract into the lower valve port 105. As a result, there are no protruding parts at the lower valve port 105, so it cannot block the sealing ball 112. Thus, the sealing ball 112 can roll to the position of the inner end of the lower valve port 105 and completely close the lower valve port 105. This effectively prevents the residual liquid in the liquefied petroleum gas cylinder 20 from being discharged through the liquefied petroleum gas straight valve, thereby preventing the illegal dumping of residual liquid by relevant personnel when the electronic tag 103 cannot be certified. This significantly improves the safety of storage, transportation and use of the liquefied petroleum gas cylinder 20.

[0052] Specifically, the upper valve core assembly 12 includes an upper valve stem 121 and an upper valve seat 122 fixedly disposed in the upper valve cavity 101. The upper valve seat 122 has an upper valve hole 123 extending axially through its middle portion. The lower part of the upper valve stem 121 has a guide rod section inserted into the upper valve hole 123 from top to bottom. An upper air-blocking boss 124 protrudes from the upper outer wall of the upper valve stem 121 and can abut against and close the bottom port of the upper valve port 104. The upper valve core assembly 12 also includes an upper valve core driving device and an upper valve core resetting device. The upper valve stem 121 can move from top to bottom under the drive of airflow and / or the upper valve core driving device, and the upper valve stem 121 can move from bottom to top under the drive of airflow and / or the upper valve core resetting device.

[0053] Under normal gas usage conditions, after the electronic tag 103 completes authorization and authentication, the upper valve core drive device drives the upper valve stem 121 to move axially downward, creating a gap between the upper gas-blocking protrusion 124 and the upper valve port 104 to allow gas flow. This allows the liquefied petroleum gas in the LPG cylinder 20 to pass through the internal chambers of the LPG straight valve and then be discharged through the upper valve port 104. After normal authorized gas usage is completed, the upper valve core reset device can drive the upper valve stem 121 to move axially upward and reset, ensuring that the upper gas-blocking protrusion 124 and the bottom end of the upper valve port 104 are reliably aligned and abutted, guaranteeing a reliable seal at the upper valve port 104 and preventing LPG leakage, thus ensuring the storage and transportation safety of the LPG cylinder 20 when not in use.

[0054] If the electronic tag 103 has not completed authorization and authentication, the upper gas blocking protrusion 124 will remain in contact with and sealed to the upper valve port 104, thereby ensuring that the passage at the upper valve port 104 is blocked during illegal gas use and illegal waste disposal operations, thereby further preventing relevant personnel from carrying out illegal gas use and illegal waste disposal operations, thereby further improving the safety of use and storage of liquefied petroleum gas cylinder 20.

[0055] More specifically, the upper inner diameter of the upper valve hole 123 is larger than its lower inner diameter, and the upper part of the inner wall of the upper valve hole 123 has an upper valve core stepped surface 125 at the junction with its lower inner wall. The upper valve core reset device is an upper reset spring 126 that is axially engaged between the upper valve core stepped surface 125 and the upper air-blocking boss 124. The upper reset spring 126 is coaxially sleeved on the outer periphery of the upper valve stem 121. The lower inner diameter of the upper valve hole 123 is narrower, which can provide reliable radial and circumferential limits for the axial reciprocating movement of the upper valve stem 121, ensuring the axial tracking and movement accuracy of the upper valve stem 121. Correspondingly, the upper return spring 126 can drive the upper valve stem 121 to move upward and reset quickly by relying on its own compressed elastic return force, so as to ensure the alignment and adaptation effect between the upper air blocking boss 124 and the upper valve port 104; while the upper valve stem 121 moves downward axially, the upper return spring 126 is gradually compressed, thereby providing appropriate structural buffer between the upper valve stem 121 and the upper valve port 123 and other adaptation components, avoiding rigid contact or collision between the moving parts.

[0056] In practical applications, the upper valve core drive device is a magnetic drive mechanism adapted for communication connection with the electronic tag 103. After the electronic tag 103 completes the corresponding electronic authentication, the magnetic drive mechanism is activated through the communication connection so that the upper valve core can be driven to move axially to meet the corresponding equipment working requirements.

[0057] Generally, a magnetic drive mechanism can be assembled and adapted from an electromagnet and its matching positioning support components. Its specific structure can be adapted to existing conventional technologies, and will not be elaborated further in this article.

[0058] It is not difficult to understand that the axial direction of the main valve body 10, the main valve chamber, and its associated coaxial components mentioned in this solution is as follows: Figure 1 The direction shown on the paper is vertical, while the axial direction of the side valve body 14 is as follows. Figure 1 The left-right direction shown on the paper, and related radial directions, can also be understood based on this. The axial and radial orientations of the main valve body 10 and other components in the rest of the text and figures can be understood with reference to this, and will not be repeated here.

[0059] On the other hand, the secondary valve chamber 111 is provided with a support member capable of supporting the sealing ball 112. When the sealing ball 112 is located on the support member, the top of the sealing ball 112 is lower than the top inner wall of the side valve port 113. In this way, it can be effectively ensured that when the liquefied petroleum gas cylinder 20 and the liquefied petroleum gas straight valve are both in the upright position, the side valve port 113 is always in communication with the secondary valve chamber 111 and the liquefied petroleum gas cylinder 20, so as to prevent the sealing ball 112 from blocking the side valve port 113 and causing poor gas communication between the liquefied petroleum gas cylinder 20 and the secondary valve chamber 111, thereby improving the filling and discharge efficiency of liquefied petroleum gas under normal operating conditions.

[0060] Furthermore, the support component is a support spring 114 arranged radially along the secondary valve body 11, and the outer diameter of the support spring 114 decreases from the middle to both ends. This transverse support spring 114 not only provides reliable structural support for the sealing ball 112, but also effectively mitigates structural impact during the rolling of the sealing ball 112, preventing the sealing ball 112 from causing rigid impact or collision with related components in the secondary valve cavity 111.

[0061] Correspondingly, the support spring 114, which is thinner at both ends and thicker in the middle as shown in the figure, can make the sealing ball 112, which rolls to the end of the support spring 114, lower, thereby further preventing the sealing ball 112 from blocking or sealing the side valve port 113, thus further ensuring that the air passage of the side valve port 113 is unobstructed.

[0062] Furthermore, a bottom plug 115 is encapsulated at the bottom of the secondary valve chamber 111, and the bottom plug 115 is threadedly connected to the secondary valve body 11. The bottom plug 115 can reliably seal the bottom of the secondary valve chamber 111 to prevent gas leakage at the bottom of the secondary valve chamber 111, ensuring that the side valve port 113 is always the only communication structure between the secondary valve chamber 111 and the liquefied petroleum gas cylinder 20.

[0063] In addition, a lower return spring 137 is embedded between the top of the lower valve seat 133 and the piston sleeve 132, and the lower return spring 137 is coaxially sleeved on the outer periphery of the lower valve stem 131. When the lower valve stem 131 moves axially toward the secondary valve body 11, the lower return spring 137 is gradually compressed, which can provide appropriate structural buffer for the lower valve stem 131 and the piston sleeve 132 and other mating parts, so as to prevent rigid impact or damage between related parts during the downward movement of the lower valve stem 131. When the lower valve stem 131 completes the corresponding action and can move upward and return to its original position axially, the elastic extension and return force of the lower return spring 137 can drive the piston sleeve 132 and the lower valve stem 131 to move upward more quickly and smoothly, thereby greatly improving the axial upward movement and return efficiency of the lower valve stem 131 and the piston sleeve 132, and improving the overall operating efficiency of the lower valve core assembly 13.

[0064] In practical applications, the communication and electronic authentication methods between the electronic tag 103 mentioned in this solution and the corresponding computer, mobile phone or related equipment are all relatively common operation and application forms in the industry. Staff can flexibly choose and apply them according to actual working conditions and needs, and will not be elaborated further.

[0065] Furthermore, a core 145 extending radially from the outside to the inside along the main valve cavity is embedded in the side valve cavity 141. A drive ring 142 is sleeved on the inner end of the core 145. The locking control device 144 is a magnetic drive mechanism that is electromagnetically coupled to the drive ring 142. Generally, the inner end of the core 145 has a protrusion with a small outer diameter, while the rear part of the drive ring 142 has a positioning slot 1421 that can be aligned and sleeved on the inner end of the core 145. This allows for precise alignment and assembly between the drive ring 142 and the core 145 through the alignment insertion between the positioning slot 1421 and the inner end of the core 145. Thus, the core 145 provides appropriate structural support and axial guidance for the drive ring 142. As for the magnetic drive mechanism used in the locking control device 144, it can be referred to the corresponding description of the upper valve core drive device above. The working principle of the two is the same, with only slight adaptive adjustments in the arrangement position and matching structure. Those skilled in the art can refer to it for understanding and application, and it will not be elaborated here.

[0066] Based on this, an inner reset plate 146 protrudes from the inner annular wall of the inner end of the side valve cavity 141, and an outer reset plate 1422 protrudes from the outer peripheral wall of the outer end of the drive ring 142. A locking reset spring 147 is coaxially sleeved on the outer periphery of the drive ring 142, with its two ends abutting against the inner reset plate 146 and the outer reset plate 1422, respectively. When the drive ring 142 moves toward the lower valve stem 131, the locking reset spring 147 is gradually compressed to alleviate the structural impact during the movement of the drive ring 142 and prevent rigid impact or damage during the insertion of the drive ring 142 into the annular groove 136. When the drive ring 142 completes the axial locking operation on the lower valve stem 131, the locking reset spring 147 gradually rebounds. At this time, the elastic extension reset force of the locking reset spring 147 can be used to drive the drive ring 142 to be pulled out of the annular groove 136 and quickly move to reset, thereby further improving the reset efficiency of the drive ring 142.

[0067] In summary, the liquefied petroleum gas (LPG) straight valve provided in this utility model, during its operation, requires the discharge of residual liquid from the LPG cylinder, i.e., "residual liquid discharge" operation. The LPG cylinder, connected to the straight valve, must be inverted. If the discharge is a standard procedure, authorization can be completed via an electronic tag, and a locking control device can be activated via communication connection. This causes the locking control device to move the drive ring towards the interior of the main valve chamber until the free end of the drive ring aligns and engages with the annular groove. At this point, the insertion connection between the drive ring and the annular groove creates an axial limit lock on the lower valve stem, maintaining its current working position and ensuring the bottom end of the lower valve stem extends beyond the lower valve port. This prevents the sealing ball from fully aligning and fitting with the inner end of the lower valve port, thus preventing the sealing ball from sealing the lower valve port and ensuring the proper functioning of all cavities within the main valve body. The smooth flow of the chambers allows residual liquid in the LPG cylinder to pass through the internal chambers of the LPG straight valve and then be discharged through the upper valve port. If the LPG cylinder and the LPG straight valve are inverted together and not authenticated via electronic tag, the drive ring cannot be inserted into the annular slot, resulting in the lower valve stem lacking any axial locking. Consequently, the lower valve stem moves downward under its own weight, causing its end to retract into the lower valve port. Since there are no protruding parts at the lower valve port, it cannot obstruct the sealing ball. The sealing ball then rolls to align with the inner end of the lower valve port, completely sealing it. This effectively prevents residual liquid in the LPG cylinder from being discharged through the LPG straight valve, thus eliminating the possibility of illegal disposal of residual liquid without electronic tag authentication, and significantly improving the safety of LPG cylinder storage, transportation, and use.

[0068] The above provides a detailed description of the liquefied petroleum gas (LPG) straight valve and the LPG cylinder using the same valve. Specific examples have been used to illustrate the principles and implementation methods of this invention. These embodiments are merely illustrative to aid in understanding the method and core concepts of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this invention.

Claims

1. A liquefied petroleum gas direct valve characterized by, The main valve body has an upper valve cavity and a lower valve cavity coaxially communicated from top to bottom, the upper valve cavity and the lower valve cavity are communicated to form a main valve cavity, the outer part of the main valve body is provided with an electronic tag, the top end of the main valve body has an upper valve port communicated with the main valve cavity, the bottom end of the main valve body has a lower valve port communicated with the main valve cavity, and a secondary valve body is further arranged below the main valve body and connected with the lower valve port in position; An upper valve core assembly is arranged in the main valve cavity, a lower valve core assembly is arranged in the lower valve cavity, the upper valve core assembly is arranged below the upper valve port and adapted to open and close the upper valve port, the lower valve core assembly comprises a lower valve rod, a piston sleeve and a lower valve seat arranged coaxially, the lower valve seat is fixedly arranged in the lower valve cavity, and the middle part of the lower valve seat has a flow guide cavity arranged in the axial direction; The lower valve rod can move up and down in the axial direction, so that the lower part of the lower valve rod can penetrate the flow guide cavity and extend towards the lower valve port, the outer wall of the middle part of the lower valve rod is movably sleeved with a piston sleeve capable of abutting against the top end of the inner ring wall of the flow guide cavity to close the flow guide cavity, and the top end of the outer wall of the lower valve rod is protrusively provided with an annular clamping table, the annular clamping table and the piston sleeve are axially gap-fitted, so as to form an annular clamping groove on the outer peripheral part of the lower valve rod; One side of the main valve body is provided with a side valve body, the inner part of the side valve body has a side valve cavity communicated with the side part of the main valve cavity, a driving ring is movably arranged in the side valve cavity, the free end of the driving ring is movably provided with a locking boss capable of being inserted into the annular clamping groove in position in the radial direction, and the outer part of the side valve body is provided with a locking control device capable of driving the driving ring to move in the radial direction of the main valve cavity to extend into the main valve cavity, the locking control device is in communication connection with the electronic tag; The inner part of the secondary valve body has a secondary valve cavity communicated below the lower valve port, a sealing ball is rollingly arranged in the secondary valve cavity, a side valve port is formed in the side wall of the secondary valve body and communicated between the secondary valve cavity and a liquefied petroleum gas cylinder, the outer diameter of the sealing ball is greater than the inner diameter of the side valve port and the inner diameter of the flow guide cavity respectively, and the inner diameter of the lower valve port is greater than the inner diameter of the flow guide cavity and the outer diameter of the sealing ball respectively.

2. The LPG direct valve according to claim 1, wherein The upper valve core assembly comprises an upper valve rod and an upper valve seat fixedly arranged in the upper valve cavity, the middle part of the upper valve seat penetrates an upper valve hole in the axial direction, and the lower part of the upper valve rod has a guide rod section inserted into the upper valve hole from top to bottom; The upper part of the outer wall of the upper valve rod is protrusively provided with an upper air blocking boss capable of abutting against and closing the bottom port of the upper valve port, the upper valve core assembly further comprises an upper valve core driving device and an upper valve core resetting device in communication connection with the electronic tag, the upper valve rod can move from top to bottom under the driving of the gas flow and / or the upper valve core driving device, and the upper valve rod can move from bottom to top under the driving of the gas flow and / or the upper valve core resetting device.

3. The LPG direct valve according to claim 2, wherein The upper valve hole has an upper inner diameter larger than a lower inner diameter, and an upper valve core step surface is arranged at the junction between the upper inner wall and the lower inner wall of the upper valve hole, the upper valve core reset device is an upper reset spring coaxially sleeved on the outer peripheral portion of the upper valve rod and clamped between the upper valve core step surface and the upper air blocking boss in the axial direction.

4. The LPG direct valve according to claim 2, wherein The upper valve core driving device is a magnetic sensing driving mechanism adapted to be communicatively connected with the electronic tag.

5. The LPG direct valve according to claim 1, wherein The auxiliary valve cavity is provided with a bearing capable of bearing a sealing ball, and when the sealing ball is located on the bearing, the top end of the sealing ball is lower than the top inner wall of the side valve port.

6. The LPG direct valve according to claim 5, wherein The bearing is a support spring arranged in the radial direction of the auxiliary valve body, and the outer diameter of the support spring decreases from the middle to the two ends.

7. The LPG direct valve according to claim 5, wherein The bottom of the auxiliary valve cavity is encapsulated with a bottom plug, and the bottom plug is threadedly connected with the auxiliary valve body.

8. The LPG direct valve according to claim 1, wherein The top end of the lower valve seat is embedded with a lower reset spring between the piston sleeve, and the lower reset spring is coaxially sleeved on the outer peripheral portion of the lower valve rod.

9. The LPG direct valve according to claim 1, wherein The side valve cavity is embedded with an iron core extending from the outside to the inside in the radial direction of the main valve cavity, the driving ring is sleeved on the inner end portion of the iron core, and the locking control device is a magnetic sensing driving mechanism adapted to be electromagnetically coupled with the driving ring.

10. The LPG direct valve according to claim 9, wherein The inner end portion of the side valve cavity is protrusively provided with an inner reset clamping table on the inner ring wall, the outer end portion of the driving ring is protrusively provided with an outer reset clamping table on the outer peripheral wall, the outer peripheral portion of the driving ring is coaxially sleeved with a locking reset spring, and the two ends of the locking reset spring are respectively abutted against the inner reset clamping table and the outer reset clamping table.

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