Valve element, valve and liquefied gas steel cylinder

Abstract

The invention discloses a valve element, a valve and a liquefied gas steel cylinder. The valve element comprises a valve element body, a magnet, a magnetic part and a non-magnetic part. The valve element body is provided with a control cavity, the magnet is installed on the valve element body, the magnetic part and the non-magnetic part are located in the control cavity, the magnetic part is attracted by the magnet to be attached to the side wall, provided with a bottom hole port, of the control cavity, and in the closed working state, the closed surface of the non-magnetic part is in closed fit with the end face of the bottom hole port, and the magnetic part is located on one side of the closed surface of the non-magnetic part. During filling, the magnetic part pushes the non-magnetic part to move to the filling working position of the control cavity under the action of the filling gun; the valve comprises a valve body and the valve element installed in the valve body. The liquefied gas steel cylinder comprises a cylinder body and the valve mounted at the opening of the cylinder body. The valve element adopts the magnetic piece and the non-magnetic piece to replace a traditional magnetic sailboard structure, and has the advantages of being simple in structure, reliable in work and low in production cost.

Description

Technical Field

[0001] The invention relates to a valve core, and also relates to a valve using the valve core and a liquefied gas cylinder using the valve. Background Art

[0002] like Figures 1 to 3 As shown, the existing valve core 100 for the anti-filling valve of the liquefied gas cylinder includes a valve core body 101, a sailboard 102 and a valve core magnet 103; the valve core body 101 includes a top, a bottom and a middle part connecting the top and the bottom, and a space with a side opening is arranged in the middle part. When the valve core 100 is installed in the valve core installation cavity of the valve, the space and the side wall of the valve core installation cavity constitute a sailboard cavity 1017; a top hole 1011 connecting the top upper side with the sailboard cavity 1017 is arranged at the top, and a bottom hole 1016 connecting the bottom lower side with the sailboard cavity 1017 is arranged at the bottom, and a port 1015 for the bottom hole 1016 to connect the sailboard cavity 1017 is arranged on the side wall of the sailboard cavity 1017; the outer side of the bottom is tightly matched with the inner side of the valve core installation cavity of the valve, and the sailboard 102 is matched with the port 1015 of the bottom hole 1016 to realize the closure of the air flow channel of the valve core by the sailboard 102, and the valve core magnet 103 is installed on the valve core body 101. Its working principle is that the magnetic sailboard 102 keeps cooperating with the port 1015 of the through hole 1016 under the magnetic force of the valve core magnet 103, so as to ensure the reliable closure of the valve core channel. When the liquefied gas cylinder is filled with liquefied gas, the high-power electromagnet of the special liquefied gas filling gun overcomes the magnetic force of the valve core magnet 103, and moves the sailboard 102 from the closed working position of the port 1015 of the bottom hole 1016 to the filling working position for liquefied gas filling; in the filling working position, the sailboard 102 is affected by the magnet of the special liquefied gas filling gun, and its upper end moves to the sailboard windproof position 1012 on the lower side of the top of the valve core, and the magnet of the special liquefied gas filling gun can use a smaller working current to keep the sailboard 102 in the filling working position.

[0003] Under normal circumstances, since illegal operators use liquefied gas cylinders to illegally fill liquefied gas and lack special liquefied gas filling guns, the illegal filling magnets they use need to obtain the magnetic force of the working electromagnet of a special liquefied gas filling gun, which is extremely large and difficult to implement. Therefore, the illegal filling magnets they use are difficult to move the sailboard 102 of the anti-filling valve core 100 from the closed working position of the bottom hole 1016 port 1015 to the filling working position. Therefore, the anti-filling valve core can achieve the purpose of preventing illegal filling of liquefied gas. However, the following illegal filling operations still pose a great challenge to the anti-filling function of the existing anti-filling valve core 100: when the liquefied gas in the liquefied gas cylinder is not completely used up, there is still a certain residual pressure in the cylinder. Before filling, the operating knob of the cylinder valve is turned open, and the sailboard 102 moves from the closed working position to the filling working position under the action of the residual pressure of the gas in the cylinder. At this time, the use of illegal filling magnets can reliably keep the sailboard 102 in the filling working position, thereby realizing illegal filling of liquefied gas.

[0004] In order to prevent the above illegal filling operations, Figure 3 As shown, the anti-filling valve core 100 is provided with a limiting protrusion 1013 at the rear side of the lower end of the top hole 1011 of the valve core body 101 near the upper end of the sailboard 102, and a limiting protrusion 1014 is provided at the rear side of the lower end of the sailboard 102 near the bottom upper side of the valve core body 101. The two limiting protrusions 1013 and 1014 cooperate with each other to prevent the sailboard 102 from moving from the closed working position to the filling working position under the action of the gas pressure in the cylinder.

[0005] The anti-filling structure of the anti-filling valve core 100 has the following defects: First, the anti-filling reliability of the valve core 100 is low. When the illegal operator uses the gas in the cylinder to open the sailboard 102, accompanied by the violent vibration of the cylinder, the sailboard 102 may break away from the limit protrusions 1013 and 1014 and be adsorbed to the filling working position by the illegal filling magnet, thereby performing illegal filling. Secondly, reliable limit requires extremely high processing accuracy of the limit protrusions 1013 and 1014, which greatly increases the manufacturing cost of the anti-filling valve core 100. Summary of the invention

[0006] One of the technical problems to be solved by the present invention is to provide a valve core that overcomes the defects of low working reliability and high manufacturing cost of the existing anti-filling valve core.

[0007] The second technical problem to be solved by the present invention is to provide a valve that overcomes the defects of the existing anti-filling valves, such as low working reliability and high manufacturing cost.

[0008] The third technical problem to be solved by the present invention is to provide a liquefied gas cylinder to overcome the defects of low reliability and high cost of the existing anti-filling work of liquefied gas cylinders.

[0009] The technical solution adopted by the present invention to solve one of its technical problems is: construct a valve core, including a valve core body and a magnet arranged on the valve core body; the valve core body includes a top, a middle and a bottom; the middle is provided with a side open space, and when the valve core is installed in the valve core installation cavity of the valve, the open space and the side wall of the valve core installation cavity constitute a control cavity of the valve core; the top is provided with a top hole connecting the top upper side and the control cavity, the bottom is provided with a bottom hole connecting the bottom lower side and the control cavity, the bottom hole includes a port arranged on the side wall of the control cavity, and the bottom The outer side is tightly matched with the inner side of the valve core installation cavity of the valve; it is characterized in that the valve core also includes a magnetic part and a non-magnetic part located in the control cavity; the magnetic part is attracted by the magnet and adheres to the side wall of the port set in the control cavity; in the closed working state, the closed surface of the non-magnetic part is tightly matched with the end face of the port, and the magnetic part is located on one side of the closed surface of the non-magnetic part; during filling, under the action of the filling gun magnet, the magnetic part pushes the non-magnetic part to move to the filling working position of the control cavity, ensuring that the magnetic part and the non-magnetic part at least partially overlap.

[0010] In the valve core of the present invention, the end surface of the port protrudes from the surface of the magnetic member adjacent to the closed surface of the non-magnetic member.

[0011] In the valve core of the present invention, the valve core body includes a wind shelter area at the magnetic component filling working position which is recessed and arranged at the lower side of the top, and the wind shelter area includes a vertical side wall cooperating with the magnetic component.

[0012] In the valve core of the present invention, the magnetic member includes an inverted U-shaped groove, and the inverted U-shaped groove is located outside the port.

[0013] In the valve core of the present invention, the non-magnetic part includes a guide part inserted into the port. In the filling working state, the guide part cooperates with the port to ensure that the closing surface and the end face of the port are reliably closed when the non-magnetic part returns to the closed working position.

[0014] In the valve core of the present invention, the magnetic member is entirely located on the upper side of the port.

[0015] In the valve core of the present invention, the valve core body includes guide surfaces relatively arranged on both sides of the control chamber, and the guide surfaces guide the non-magnetic part to move between the filling working position and the closing working position.

[0016] In the valve core of the present invention, a protrusion is provided on the upper edge of the bottom of the valve core body, and the protrusion prevents the lower end of the non-magnetic member from falling out of the bottom edge of the valve core body.

[0017] The technical solution adopted by the present invention to solve the second technical problem is: constructing a valve, including a valve body and a valve core installed in a valve core installation cavity of the valve body, characterized in that the valve core adopts the valve core described above.

[0018] The technical solution adopted by the present invention to solve the third technical problem is: constructing a liquefied gas cylinder, including a bottle body and a valve installed at the bottle mouth of the bottle body, characterized in that the valve adopts the valve described above.

[0019] Compared with the prior art, the valve core, valve and liquefied gas cylinder of the present invention have the following beneficial effects:

[0020] 1. Use magnetic parts and non-magnetic parts to replace the existing magnetic sailboard. The magnetic part is used as the non-magnetic part opening action control part, and the non-magnetic part is used as the anti-filling closing working part. The non-magnetic part is not affected by the magnet, but can reliably close the valve core airflow channel under the pressure of the filling airflow. Only under the action of the special liquefied gas filling gun, the non-magnetic part can be reliably limited in the filling working position by the magnetic part to complete the liquefied gas filling; the non-magnetic part can be opened by the residual pressure of the gas in the cylinder, but the magnetic part cannot be opened. When filling liquefied gas , the flow rate of the filling airflow on the closed surface side of the non-magnetic part is greater than the flow rate on the rear side of the non-magnetic part, resulting in the pressure of the filling airflow on the closed surface side of the non-magnetic part being less than the pressure on the rear side of the non-magnetic part, so that the filling airflow pushes the non-magnetic part back to the closed working position to close the valve core airflow channel; in addition, when the non-magnetic part is provided with a guide part, the filling airflow impacts the guide part, generating a pulling force on the non-magnetic part in the direction of the bottom hole port, and also pushing the non-magnetic part back to the closed working position to close the valve core airflow channel, thereby reliably preventing the use of the residual pressure of the gas in the cylinder for illegal filling;

[0021] 2. High reliability in preventing illegal filling;

[0022] 3. The valve core has a simple structure and low manufacturing precision requirements, which greatly reduces the valve core manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The invention discloses a front view of a valve core of an existing anti-filling valve for a liquefied gas cylinder.

[0024] Figure 2 yes Figure 1 Exploded perspective view of the valve core.

[0025] Figure 3 yes Figure 1 Cross-section of the valve core.

[0026] Figure 4 It is a front view of an embodiment of a valve core of the present invention.

[0027] Figure 5 yes Figure 4 Exploded perspective view of an embodiment.

[0028] Figure 6 yes Figure 4 Cross-sectional view of an embodiment.

[0029] Figure 7 It is a right side view of another embodiment of the valve core of the present invention, showing another structure of the magnet.

[0030] Figure 8 It is a three-dimensional view of another embodiment of the valve core of the present invention, showing another installation position of the magnet.

[0031] Fig. 9 It is an exploded stereogram of another embodiment of the valve core of the present invention.

[0032] Fig.10 yes Fig. 9 Cross-sectional view of the embodiment in the closed state.

[0033] Fig.11 It is an exploded stereogram of another embodiment of the valve core of the present invention.

[0034] Fig.12 yes Fig.11 Cross-sectional view of the embodiment in the closed state.

[0035] Fig.13 It is a front view with a partial section of an embodiment of the valve of the present invention.

[0036] Fig.14 It is a front view with a partial section of another embodiment of the valve of the present invention.

[0037] Fig.15 It is a partial view of an embodiment of a liquefied gas cylinder of the present invention. DETAILED DESCRIPTION

[0038] The present invention will be described in detail below in conjunction with typical embodiments and the accompanying drawings, and the same reference numerals in each figure indicate the same or similar parts. Although the specification discloses typical embodiments, there may still be other embodiments that make changes to the embodiments of the specification without departing from the spirit and scope of the present invention. The following detailed description does not limit the present invention, and the scope of protection of the present invention is defined by the claims and their equivalent technical solutions.

[0039] like Figures 4 to 6 As shown, the valve core 200 of the present invention includes a valve core body 201 , a magnetic component 202 , a non-magnetic component 203 and a magnet 204 .

[0040] The valve core body 201 includes a top, a middle and a bottom. The middle is provided with a space with an open side. When the valve core 200 is installed in the valve core installation cavity of the valve, the open space and the side wall of the valve core installation cavity constitute the control cavity 2013 of the valve core 200. The top is provided with a top hole 2011 connecting the top upper side with the control cavity 2013, and the bottom is provided with a bottom hole 2016 connecting the bottom lower side with the control cavity 2013. The bottom hole 2016 includes a port 2015 provided on the side wall of the control cavity 2013; the outer side of the bottom is tightly matched with the inner side of the valve core installation cavity of the valve to ensure that the liquefied gas is filled through the path of the top hole-control cavity-bottom hole.

[0041] The magnetic member 202 is made of a magnet or a magnetic material, and generates magnetic force with the magnet 204. The magnet 204 is mounted on the valve core body 201, and the magnetic member 202 is attracted by the magnetic force of the magnet 204 to the magnetic member 202, so that the magnetic member 202 is adsorbed on the side wall of the bottom hole port 2015 of the control chamber 2013. When the magnetic member 202 is a magnet, the adjacent magnetic poles of the magnetic member 202 and the magnet 204 are opposite to each other, so as to generate a magnetic force of attraction.

[0042] like Figure 6 , 7 As shown in Figure 8, the magnet 204 can be installed on the rear side or both sides of the rear side of the side wall of the bottom hole port 2015 of the control chamber 2013. The magnet 204 can be, but is not limited to, a cylindrical magnet, a tile-shaped magnet, etc. The number of magnets can be one, two or more, so as to ensure that the magnetic part 202 is adsorbed on the side wall of the bottom hole port 2015 of the control chamber 2013. The attraction of the magnet 204 to the magnetic part 202 can resist the attraction of the external illegal filling magnet to the magnetic part, and the working electromagnet of the special liquefied gas filling gun can operate the magnetic part to move from the side wall of the control chamber to the filling working position.

[0043] In the closed working state, the closed surface of the non-magnetic part 203 is tightly matched with the end surface of the port 2015 to close the liquefied gas filling path, and the magnetic part 202 is located on one side of the closed surface of the non-magnetic part 203. During filling, under the action of the electromagnet of the special liquefied gas filling gun, the magnetic part 202 pushes the non-magnetic part 203 to move to the filling working position of the control chamber, that is, the position of the side wall opposite to the side wall of the control chamber 2013 where the port is set.

[0044] like Figure 5 As shown, the lower structure of the magnetic member 202 adopts an inverted U-shaped groove structure, and the inverted U-shaped groove is located outside the port 2015. When the magnetic member 202 is acted upon by the electromagnet of the special liquefied gas filling gun, the non-magnetic member 203 is pushed horizontally to the filling working position.

[0045] In this embodiment, the end surface of the bottom hole port 2015 of the valve core body protrudes from the surface of the magnetic part 202 adjacent to the closed surface of the non-magnetic part 203, and the closed surface of the non-magnetic part 203 adopts a complete plane, which can ensure that the closed surface of the non-magnetic part 203 and the end surface of the port 2015 are reliably and tightly matched. In other embodiments, the end surface of the bottom hole port 2015 can be lower than the surface of the magnetic part 202 adjacent to the closed surface of the non-magnetic part 203. In this case, the non-magnetic part 203 can adopt a raised closed surface to ensure that the closed surface and the end surface of the bottom hole port 2015 are reliably and tightly matched, which can also achieve the purpose of the present invention.

[0046] In this embodiment, a recessed wind shelter 2012 for the magnetic component filling working position is provided on the lower side of the top of the valve core body 201, and the wind shelter includes a vertical side wall that cooperates with the magnetic component 202. When filling liquefied gas, under the action of the electromagnet of the special liquefied gas filling gun, the magnetic component 202 reaches the filling working position, and its upper end moves up to the wind shelter 2012. At this time, the upper end of the magnetic component 202 is limited by the vertical side wall of the wind shelter 2012. At the same time, since the magnetic component 202 is close to the electromagnet of the special liquefied gas filling gun, the magnetic force generated by the two is large. The special liquefied gas filling gun uses a small current, and its electromagnet can maintain the magnetic component 202 in the filling working position, which can greatly reduce the power consumption and heat generation of the special liquefied gas filling gun. In other embodiments, the wind shelter 2012 is not provided, which does not affect the realization of the purpose of the present invention.

[0047] like Figure 5 , Figure 6 As shown, in order to ensure that the closed surface of the non-magnetic part 203 and the bottom hole port 2015 are accurately matched, a guide part 2031 inserted into the bottom hole port 2015 is provided on one side of the closed surface of the non-magnetic part 203. In the filling working state, the guide part 2031 cooperates with the bottom hole port 2015 to ensure that the closed surface and the end face of the bottom hole port 2015 are reliably closed when the non-magnetic part 203 returns to the closed working position.

[0048] In the filling working state, the guide member 2031 structure needs to satisfy the requirements of guiding and ensuring the passing area of ​​the inflation airflow. The guide member 2031 can be a columnar structure (such as Figure 5 , Figure 6 As shown), a cylindrical structure can also be used with grooves cut on the cylinder (as shown Fig. 9 , Fig.10 As shown), in order to allow airflow to pass through, a cylindrical structure may be adopted and holes may be opened on the cylinder to allow airflow to pass through.

[0049] In this embodiment, the valve core body 201 is provided with opposite guide surfaces 2014 on both sides of the control chamber 2013, and the two guide surfaces 2014 guide the non-magnetic member 203 to move between the filling working position and the closing working position, ensuring that the closing surface of the non-magnetic member 203 and the end surface of the bottom hole port 2015 are reliably closed. In other embodiments, only the guide surface 2014 can be provided for guidance or only the guide member 2031 can be provided for guidance, which can also achieve the purpose of the present invention.

[0050] like Fig.11 , Fig.12 As shown, in other embodiments, the magnetic member 202 can adopt a structure in which the whole is located on the upper side of the bottom hole port 2015 (i.e., two legs in an inverted U shape are not provided). At this time, the magnetic member 202 is attracted by the electromagnet of the special liquefied gas filling gun, and when it moves from the closed working position attached to the side wall of the control chamber 2013 where the port is set to the filling working position, it pushes the non-magnetic member 203 to rotate or move or move while rotating to the filling working position. In the filling working position, it is ensured that the magnetic member 202 and the non-magnetic member 203 at least partially overlap, so as to ensure that after the filling is completed and the filling gun is pulled out, when the magnetic member 202 and the non-magnetic member 203 return to the closed working position, the magnetic member 202 is located on the side of the closed surface of the non-magnetic member 203, and the valve core 200 anti-filling work is carried out in a normal cycle.

[0051] like Figure 6 As shown, a protrusion 2017 is provided on the upper edge of the bottom of the valve core body 201. During the process of assembling the valve core 200 into the valve core installation cavity of the valve, the protrusion 2017 prevents the lower end of the non-magnetic part 203 from falling out of the bottom edge of the valve core body 201, thereby improving the assembly efficiency of the valve core 200.

[0052] like Fig.13 As shown, the valve 10 of the present invention includes a valve body 11 and a valve core installed in a valve core installation cavity of the valve body 11. The valve core is the valve core 200 of the present invention as described above, so that an anti-filling valve 10 with a simple structure and reliable operation can be obtained.

[0053] Fig.14 This is another embodiment of the valve 10 of the present invention. The valve of this embodiment is equipped with an anti-disassembly device 12. After the valve is assembled on the liquefied gas cylinder, it can prevent illegal operators from disassembling the valve.

[0054] like Fig.15 As shown, the liquefied gas cylinder 20 of the present invention comprises a bottle body 21 and a valve installed at the bottle mouth of the bottle body. The valve adopts the valve 10 of the present invention as described above, and the anti-filling liquefied gas cylinder 20 can be obtained.

[0055] The above description has described various embodiments in conjunction with the accompanying drawings. However, it is obvious that various modifications and changes can be made without departing from the scope of the claims of the present invention to obtain other embodiments, and the purpose of the present invention can also be achieved. In conjunction with the embodiments disclosed in the description of the present invention, other embodiments that achieve the purpose of the present invention will be obvious to those skilled in the art.

Claims

1. A valve core, comprising a valve core body and a magnet arranged on the valve core body; The valve core body comprises a top, a middle and a bottom; the middle is provided with a side open space, and when the valve core is installed in the valve core installation cavity of the valve, the open space and the side wall of the valve core installation cavity constitute the control cavity of the valve core; the top is provided with a top hole connecting the top upper side with the control cavity, the bottom is provided with a bottom hole connecting the bottom lower side with the control cavity, the bottom hole comprises a port arranged on the side wall of the control cavity, and the outer side of the bottom is tightly matched with the inner side of the valve core installation cavity of the valve; It is characterized in that The valve core also includes a magnetic component and a non-magnetic component located in the control cavity; The magnetic member is attracted by the magnet and attached to the side wall of the control cavity where the port is arranged; In the closed working state, the closed surface of the non-magnetic part is tightly matched with the end face of the port, and the magnetic part is located on one side of the closed surface of the non-magnetic part; during filling, under the action of the filling gun magnet, the magnetic part pushes the non-magnetic part to move to the filling working position of the control chamber, ensuring that the magnetic part and the non-magnetic part at least partially overlap.

2. The valve core according to claim 1, characterized in that: The end surface of the port protrudes from the surface of the magnetic component adjacent to the closed surface of the non-magnetic component.

3. The valve core according to claim 1, characterized in that: The valve core body includes a wind shelter area at a magnetic component filling working position which is recessed and arranged at the lower side of the top, and the wind shelter area includes a vertical side wall which cooperates with the magnetic component.

4. The valve core according to claim 1, characterized in that: The magnetic member includes an inverted U-shaped groove, and the inverted U-shaped groove is located outside the port.

5. The valve core according to claim 1, characterized in that: The non-magnetic part includes a guide part inserted into the port. In the filling working state, the guide part cooperates with the port to ensure that the closing surface and the end face of the port are reliably closed when the non-magnetic part returns to the closed working position.

6. The valve core according to claim 1, characterized in that: The magnetic component is entirely located on the upper side of the port.

7. The valve core according to claim 1, characterized in that: The valve core body comprises guide surfaces which are arranged opposite to each other on both sides of the control chamber, and the guide surfaces guide the non-magnetic part to move between a filling working position and a closing working position.

8. The valve core according to any one of claims 1 to 7, characterized in that: A protrusion is arranged on the upper side edge of the bottom of the valve core body, and the protrusion prevents the lower end of the non-magnetic part from falling out of the bottom edge of the valve core body.

9. A valve, comprising a valve body and a valve core installed in a valve core installation cavity of the valve body, characterized in that: The valve core is a valve core as claimed in any one of claims 1 to 8.

10. A liquefied gas cylinder, comprising a cylinder body and a valve installed at the mouth of the cylinder body, characterized in that: The valve is the valve according to claim 9.

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