CN220668386U

CN220668386U - Gas cut-off valve

Info

Publication number: CN220668386U
Application number: CN202322194162.0U
Authority: CN
Inventors: 黄陈宝; 黄科淞
Original assignee: Zhejiang Xinqi Pipe Industry Co ltd
Current assignee: Zhejiang Xinqi Pipe Industry Co ltd
Priority date: 2023-08-15
Filing date: 2023-08-15
Publication date: 2024-03-26
Anticipated expiration: 2033-08-15

Abstract

The utility model provides a gas shut-off valve, and belongs to the technical field of valves. The problem that an existing cut-off valve is easy to accidentally close under a high-pressure environment is solved. The gas shut-off valve comprises a valve body with an air inlet end and an air outlet end, wherein a valve core and a spring positioned at the left side of the valve core are further arranged in the valve body, the valve core can move towards the right end direction and block the air inlet end and the air outlet end under the action of the elasticity of the spring, a rod-shaped valve rod is further arranged in the valve body in a penetrating manner, the valve rod can be positioned after moving towards the inner end direction along the axial direction of the valve rod, the axial direction of the valve rod is vertical to the moving direction of the valve core, the inner end of the valve rod is provided with a guide surface, the width of the valve rod positioned at the guide surface is gradually increased from the inner end to the outer end direction, when the valve rod moves towards the inner end direction, the guide surface can be propped against the right end of the valve core and push the valve core to move towards the left end, and the valve core can vertically prop against the outer side surface of the valve rod under the action of the elasticity of the spring. The gas shut-off valve has the advantage of good use stability.

Description

Gas cut-off valve

Technical Field

The utility model belongs to the technical field of valves, and relates to a gas shut-off valve, in particular to a high-pressure electromagnetic shut-off valve of a liquefied petroleum gas steel cylinder.

Background

The gas tank, also called as liquefied petroleum gas steel bottle, is a steel bottle for storing high pressure gas, and is a common gas source for people to cook, especially a part of restaurants or mobile booths. In order to ensure the safety of gas use, a gas valve for controlling the on-off of the pipeline is connected to the gas output pipeline, and when gas leakage is found, the gas pipeline can be blocked in time through the gas valve, so that accidents such as gas explosion or gas poisoning are avoided.

For example, people designed a bottled gas high pressure end emergency shut-off valve and combination valve to filed a chinese patent, its application number is: 202310629684.0; the publication number is: CN116428518A; the bottled gas high-pressure end emergency cut-off valve and the combined valve comprise a valve body provided with a gas passing channel and a push rod vertically arranged in the valve body, wherein the side part of the valve body is also connected with a driving mechanism capable of driving the push rod to move up and down and positioning the push rod after the push rod moves in place, the gas passing channel is transversely provided with an annular sealing seat in the gas passing channel, the gas passing channel is also internally provided with an action spring which is transversely arranged and a sealing piece which is spherical and positioned below the push rod, one end, which is closer to the gas inlet position of the gas passing channel, of the two ends of the action spring is limited in the gas passing channel, the other end of the action spring is propped against the sealing piece, a tapered guide surface is arranged in an orifice of one end of the sealing seat, the sealing piece is propped against the orifice of the end of the sealing seat, and a yielding gap is arranged between the sealing piece and the inner wall of the valve body along the axial direction of the push rod. According to the bottled gas high-pressure end emergency cut-off valve and the combined valve, under the default condition, the ejector rod is pressed down to push the orifice of the sealing piece self-sealing seat open, so that the ventilation state of the gas passage is kept, if gas leakage occurs, the ejector rod can be driven by the driving mechanism to reset, the sealing piece resets under the action of the elastic force of the acting spring, the orifice of the sealing seat is plugged again, and blocking of gas is realized.

However, in actual use, the sealing member is spherical, and the ejector rod is propped against the upper side of the sealing member, when the air inlet pressure is large, the sealing member can roll along the inner wall of the valve body under the pressure of fuel gas and the elasticity of the acting spring, so that the ejector rod is jacked upwards, the air passage is accidentally closed, inconvenience is brought to users, and particularly when the valve is arranged at a high-pressure end, the fuel gas pressure is larger, and the situation is more likely to occur.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and provides a gas shut-off valve, which solves the problem that the conventional shut-off valve is easy to accidentally close in a high-pressure environment.

The aim of the utility model can be achieved by the following technical scheme:

the gas shut-off valve comprises a valve body with an air inlet end and an air outlet end, wherein a valve core and a spring positioned on the left side of the valve core are further arranged in the valve body, the valve core can move towards the right end direction and block the air inlet end and the air outlet end under the action of the elasticity of the spring, a rod-shaped valve rod is further arranged in the valve body in a penetrating mode, and can move towards the inner end direction along the axial direction of the valve rod and then be positioned.

When the gas shut-off valve is used, the valve rod moves along the axis of the valve rod towards the inner end direction, namely, the direction perpendicular to the movement direction of the valve core, the guide surface obliquely arranged relative to the axis abuts against the right end of the valve core, the right end of the valve core continuously moves leftwards along with the inclination change of the guide surface along with the continuous inner movement of the valve rod so as to compress the spring and open the valve, until the valve rod is positioned, the valve core vertically abuts against the outer side surface of the valve rod under the action of the elastic force of the spring and keeps the state of the open valve, so that gas can be smoothly delivered along a gas pipeline through the valve body. When gas leakage occurs, the valve rod moves outwards to reset, after the valve rod is blocked, the valve core also resets rightwards under the action of the elastic force of the spring until the air inlet end and the air outlet end are blocked, so that the gas is cut off, and the safety is ensured.

In the use of this gas trip valve, because of the setting of guide surface for the valve rod can promote the case removal of perpendicular setting, makes the valve can open, afterwards, the case is supported perpendicularly under the elasticity effect of spring and is acted on the lateral surface of valve rod, and then no matter the atmospheric pressure of air inlet is big, and the case of vertical effect can't promote the valve rod along its axial displacement, has avoided the unexpected condition of closing of valve, makes this gas trip valve be suitable for the use at high-pressure environment.

In the above gas shut-off valve, a guide seat is provided in the valve body, a first guide hole is provided in the guide seat along the axial direction of the valve rod at the position opposite to the valve rod, the inner end of the valve rod can extend into the first guide hole, a second guide hole is provided in the guide seat along the horizontal direction, the second guide hole is perpendicular to the first guide hole in the direction of opening and is communicated with the first guide hole, and the right end of the valve core passes through the second guide hole and extends into the first guide hole. The first guide hole and the second guide hole are formed to guide the moving direction of the valve core and the valve rod, so that the moving stability of the valve core and the valve rod is ensured, the valve core can be vertically abutted against the valve rod, the condition that the valve core cannot jack up the valve rod is ensured, and the condition that the valve is accidentally closed is avoided.

In the above gas shut-off valve, the aperture of the first guide hole is slightly larger than the width of the valve rod, the sidewall of the second guide hole is provided with a gas passing hole in a penetrating way, the aperture of the right end of the second guide hole is slightly larger than the width of the right end of the valve core, and the aperture of the left end of the second guide hole is larger than the aperture of the right end and a gas passing gap is formed between the inner wall of the Kong Erzuo end of the lead and the outer sidewall of the valve core. The aperture of the first guide hole is slightly larger than the width of the valve rod, the radial position of the valve rod can be better guided and limited for the movement of the valve rod, the aperture of the right end of the second guide hole is slightly larger than the width of the right end of the valve core, the guide and radial limiting effects can be achieved, the perpendicularity between the valve core and the valve rod is further guaranteed, and the possibility that the valve core is accidentally jacked up the valve rod is completely avoided. The guide Kong Erzuo end with slightly larger aperture and the opening of the air passing hole independent of the guide hole can avoid influencing the air passing on the basis of ensuring the guide effect and ensure the air passing and the air passing smoothness.

In the fuel gas cut-off valve, an annular guide ring is fixed in the valve body, the left end of the valve core penetrates through the guide ring, the spring is sleeved on the outer side of the valve core, and two ends of the spring respectively lean against the guide ring and the valve core. The left end of the valve core is radially limited and guided through the guide ring, and the stability of the moving direction of the valve core is guaranteed by matching with the second guide hole, so that the valve core is prevented from accidentally jacking up the valve rod.

In the above gas shut-off valve, the outer side of the valve core is provided with a convex annular shoulder, the outer side of the valve core is sleeved with an annular sealing ring, the left end of the sealing ring abuts against the shoulder, and when the valve core moves rightwards under the action of the elasticity of the spring, the sealing ring can abut against the left end port of the second guide hole and block the second guide hole. The sealing ring is matched for plugging, so that the cutting effect is better.

In the above gas shut-off valve, the right end of the valve element is rod-shaped, and the end of the right end of the valve element has a spherical surface. The right end of the valve core is in a rod shape, so that the guide of the moving direction is facilitated, the valve rod capable of being conveniently and vertically moved can push the valve core to move left by virtue of the guide surface, and the use reliability is ensured.

In the above-described gas shutoff valve, the guide surface is a tapered surface. The conical surface is convenient to process and assemble.

In the above-mentioned gas shut-off valve, still be fixed with magnet and power-on coil in the valve body, the valve rod is the outer end of integral type structure and valve rod is fixed with the iron core, the iron core part stretches out the valve body, when the valve rod moves to the inner direction the iron core is close to magnet and can be adsorbed by magnet and fix a position, the power-on coil can exert the effort that drives the valve rod and remove to the outer end direction to the iron core when circular telegram. The valve rod moving inwards is positioned by the matching of the magnet and the iron core, the valve is kept in an open state, and the valve rod is driven to move outwards by the instant acting force of the electrified coil so as to cut off a fuel gas channel rapidly.

In the above gas shut-off valve, the guide seat is located in the air inlet end. The guide seat is arranged in the air inlet end, namely the blocking and blocking position of the valve core is also positioned in the air inlet end, so that when the valve is blocked, no fuel gas can leak out from the valve rod, and the safety of the valve after being blocked is ensured.

Compared with the prior art, the gas shut-off valve has the following advantages:

1. in the use of this gas shut-off valve, after the valve was opened, the case was supported perpendicularly under the elasticity effect of spring and is acted on the lateral surface of valve rod, and then no matter the atmospheric pressure of admitting air is big, the case of vertical effect all can't promote valve rod along its axial displacement, has avoided the unexpected condition of closing of valve for this gas shut-off valve is suitable for the use at high pressure environment.

2. The valve core in the gas shut-off valve is positioned in the air inlet end, namely the blocking position is also positioned in the air inlet end, so that when the valve is blocked, no gas can leak out from the valve rod, and the safety of the valve after being cut off is ensured.

Drawings

Fig. 1 is a schematic sectional view of the present gas shutoff valve.

Fig. 2 is a schematic sectional view of the present gas shutoff valve when opened.

In the figure, 1, a valve body; 11. an air inlet end; 12. an air outlet end; 13. a guide seat; 13a, a first guide hole; 13b, a second guide hole; 13c, passing through the air hole; 14. a main body; 15. a valve cap; 16. a coil housing; 17. a coil base; 2. a valve core; 21. shoulder; 3. a spring; 4. a valve stem; 41. a guide surface; 5. an overgas gap; 6. a guide ring; 7. a seal ring; 8. a magnet; 9. a power-on coil; 10. an iron core; 101. a steel cylinder sealing ring; 102. a filter screen; 104. an air inlet joint; 105. a hand wheel; 106. a gasket; and 107, a return spring.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1, the gas shut-off valve comprises a valve body 1 with an air inlet end 11 and an air outlet end 12, wherein a valve core 2 and a spring 3 positioned on the left side of the valve core 2 are arranged in the valve body 1, and the valve core 2 can move towards the right end direction under the action of the elasticity of the spring 3 and block an air passing channel between the air inlet end 11 and the air outlet end 12. A rod-shaped valve rod 4 is arranged between the air inlet end 11 and the air outlet end 12 on the valve body 1 in a penetrating manner, the valve rod 4 can move towards the inner end direction along the axial direction of the valve rod 4, and the outer end of the valve rod 4 is also connected with a driving mechanism which can position the valve rod 4 after the inner movement and can drive the valve rod 4 to move outwards along the axial direction. In this embodiment, the valve body 1 includes a main body 14 having an air inlet end 11 and an air outlet end 12, a circular valve cap 15 screwed on the neck of the main body 14, a coil base 17 screwed on the other end of the valve cap 15 opposite to the main body 14, and a coil housing 16 fixed to the coil base 17, the inner end of the valve rod 4 sequentially passes through the coil base 17 and the valve cap 15 and extends into the main body 14, and the outer end of the valve rod 4 is located in the coil housing 16; the driving mechanism comprises a ring-shaped magnet 8 fixed in a coil shell 16, a cylindrical energizing coil 9 and a columnar iron core 10 fixed at the outer end of the valve rod 4, the valve rod 4 is of an integrated structure, the iron core 10 and the valve rod 4 are coaxially arranged, the outer end of the iron core 10 extends out of the top of the coil shell 16, when the valve rod 4 moves towards the inner end direction, the iron core 10 is close to the magnet 8 and can be adsorbed and positioned by the magnet 8, at the moment, the magnet 8 is sleeved on the outer side of the valve rod 4, a circular gasket 106 is sleeved on the outer side of the valve rod 4 between the magnet 8 and the iron core 10, and when the energizing coil 9 is energized, the iron core 10 can be applied with force for driving the valve rod 4 to move towards the outer end direction; in addition, the outside of valve rod 4 still axial fixity is the annular flaky fender ring, and valve rod 4 outside cover is equipped with reset spring 107, and reset spring 107's both ends are supported respectively and are leaned on valve bonnet 15 and fender ring for valve rod 4 has the trend of outwards removing.

The axial direction of the valve rod 4 is perpendicular to the moving direction of the valve core 2, a guide surface 41 is arranged at the inner end of the valve rod 4, the width of the valve rod 4 at the guide surface 41 is gradually increased from the inner end to the outer end, when the valve rod 4 moves towards the inner end, the guide surface 41 can abut against the right end of the valve core 2 and push the valve core 2 to move towards the left end, when the valve rod 4 is positioned, the guide surface 41 can exceed the right end position of the valve core 2, the valve core 2 can vertically abut against the outer side surface of the valve rod 4 under the action of the elasticity of the spring 3, and the abutting position is positioned between the guide surface 41 and the outer end of the valve rod 4. In the present embodiment, the guide surface 41 is a tapered surface, the right end of the valve element 2 is a round rod, and the end of the right end of the valve element 2 has a spherical surface capable of abutting against the guide surface 41.

Specifically, the air inlet end 11 of the valve body 1 is internally provided with a guide seat 13 integrally formed with the valve body 1, a first guide hole 13a is formed in the guide seat 13 opposite to the valve rod 4 in a penetrating manner along the axial direction of the valve rod 4, the diameter of the first guide hole 13a is slightly larger than that of the valve rod 4, the guide seat can be in transition fit with the valve rod 4, and the inner end of the valve rod 4 can extend into the first guide hole 13 a. The guide seat 13 is internally provided with a second guide hole 13b along the horizontal direction, the second guide hole 13b is perpendicular to the first guide hole 13a in the opening direction, the right end of the second guide hole 13b is communicated with the middle part of the first guide hole 13a, the right end of the valve core 2 penetrates through the second guide hole 13b and stretches into the first guide hole 13a, the diameter of the right end of the second guide hole 13b is slightly larger than the diameter of the right end of the valve core 2, the two guide holes are in transition fit, the diameter of the left end of the second guide hole 13b is larger than the diameter of the right end of the guide hole, an air passing gap 5 is formed between the inner wall of the end of the guide wire Kong Erzuo and the outer side wall of the valve core 2, an air passing hole 13c is formed in a penetrating mode on the side wall of the top of the second guide hole 13b, and the air passing hole 13c and the first guide hole 13a are mutually independent and are arranged at intervals.

The outside of the valve core 2 is provided with a convex annular convex shoulder 21, one end of the convex shoulder 21 facing the guide seat 13 is provided with a concave annular sealing groove, the outside of the valve core 2 is sleeved with a circular sealing ring 7, the sealing ring 7 is arranged in the sealing groove and abuts against the bottom of the sealing groove, and the sealing ring 7 extends out of the sealing groove towards one end of the guide seat 13. When the valve core 2 moves rightwards under the action of the elastic force of the spring 3, the sealing ring 7 can be abutted against the left end port of the second guide hole 13b on the guide seat 13 and block the second guide hole 13b so as to block out overair.

The valve body 1 is internally provided with a circular guide ring 6, the left end of the valve core 2 is in a round rod shape and penetrates through the guide ring 6, the spring 3 is sleeved outside the valve core 2, and two ends of the spring 3 respectively lean against the guide ring 6 and a convex shoulder 21 of the valve core 2. In this embodiment, the left end of the valve core 2 is disposed through the center of the guide ring 6, and a plurality of through holes are disposed through the guide ring 6 at positions deviating from the center, and the plurality of through holes are uniformly distributed around the center hole of the guide ring 6.

As shown in fig. 2, when the gas shut-off valve is in use, the end part of the outer end of the iron core 10 extending out of the coil shell 16 is pressed inwards, so that the iron core 10 drives the valve rod 4 to compress the reset spring 107 inwards, the inner end of the valve rod 4 extends into the first guide hole 13a, and the guide surface 41 abuts against the spherical surface of the right end of the valve core 2. As the valve rod 4 moves further, the guide surface 41 applies a biasing force to the valve element 2, and the valve element 2 moves toward the left side by the compression spring 3 under the guide of the guide hole two 13 b. Until the iron core 10 is close to the magnet 8 and is attracted by the magnet 8, the valve rod 4 is positioned, and at the moment, the valve core 2 vertically abuts against the outer side surface of the valve rod 4 under the action of the elastic force of the spring 3.

Because the valve core 2 moves leftwards, the sealing ring 7 leaves the left end port of the second guide hole 13b, and the fuel gas at the air inlet end 11 can be sequentially sent out to the air outlet end 12 through the through hole on the guide ring 6, the air passing gap 5 at the second guide hole 13b and the air passing hole 13c for air supply.

As shown in fig. 1, when the gas leaks, the gas leakage alarm sends a corresponding shut-off signal to the gas shut-off valve, the energizing coil 9 is energized, and the force of outward movement is applied to the iron core 10, so that the force of attraction of the magnet 8 to the iron core 10 is cancelled. The valve rod 4 and the iron core 10 are moved outward by the elastic force of the return spring 107, and the inner end of the valve rod 4 is moved outward of the guide hole one 13 a.

After the valve rod 4 is blocked, the valve core 2 is reset rightwards under the action of the elastic force of the spring 3 until the sealing ring 7 is propped against the left end port of the second guide hole 13b again, the second guide hole 13b is plugged again to block the air inlet end 11 and the air outlet end 12, the cutting-off of fuel gas is realized, and the safety is ensured.

In addition, for the convenience of connection, the air inlet end 11 is also screwed with an air inlet joint 104 in a circular tube shape, a hand wheel 105 is sleeved outside the air inlet joint 104, an end part of the air inlet joint 104 far away from the air inlet end 11 is fixed with a steel cylinder sealing ring 101 in a circular ring shape, the inside of the end of the air inlet joint 104 is fixed with a filter screen 102, and the guide ring 6 is tightly pressed between the air inlet joint 104 and the inner wall of the air inlet end 11.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a gas shut-off valve, includes valve body (1) that has inlet end (11) and end (12) of giving vent to anger, still be provided with case (2) and be located the left spring (3) of case (2) in valve body (1), case (2) can move and block inlet end (11) and end (12) of giving vent to anger to the right side direction under the elasticity effect of spring (3), still wear to be equipped with in valve body (1) and be in the valve rod (4) of shaft shape, valve rod (4) can follow self axial to the back location of inwards direction removal, a serial communication port, the axial of valve rod (4) with the direction of movement of case (2) is mutually perpendicular, the inner of valve rod (4) has guide surface (41), and the width that valve rod (4) are located guide surface (41) department increases gradually from the inner outwards end direction, when valve rod (4) inwards moves, guide surface (41) can support and lean on the right end of case (2) and promote valve rod (2) to move to the left side, just case (2) can be in the elasticity effect of spring (3) under the valve rod (4) is in perpendicular under the valve rod effect.

2. The gas shut-off valve according to claim 1, wherein the valve body (1) is internally provided with a guide seat (13), a first guide hole (13 a) is formed in the position, opposite to the valve rod (4), of the guide seat (13) along the axial direction of the valve rod (4), the inner end of the valve rod (4) can extend into the first guide hole (13 a), a second guide hole (13 b) is formed in the guide seat (13) along the horizontal direction, the second guide hole (13 b) is perpendicular to the first guide hole (13 a) in the forming direction, the second guide hole (13 b) is communicated with the first guide hole (13 a), and the right end of the valve core (2) penetrates through the second guide hole (13 b) and extends into the first guide hole (13 a).

3. The gas shut-off valve according to claim 2, wherein the diameter of the first guide hole (13 a) is larger than the width of the valve rod (4), the side wall of the second guide hole (13 b) is provided with a through hole (13 c) in a penetrating manner, the diameter of the right end of the second guide hole (13 b) is larger than the width of the right end of the valve core (2), the diameter of the left end of the second guide hole (13 b) is larger than the diameter of the right end, and an air gap (5) is formed between the inner wall of the end of the lead Kong Erzuo and the outer side wall of the valve core (2).

4. The gas shut-off valve according to claim 1, 2 or 3, wherein a ring-shaped guide ring (6) is further fixed in the valve body (1), the left end of the valve core (2) is arranged in the guide ring (6) in a penetrating manner, the spring (3) is sleeved on the outer side of the valve core (2), and two ends of the spring (3) respectively lean against the guide ring (6) and the valve core (2).

5. A gas shut-off valve according to claim 3, wherein the outer side of the valve core (2) is provided with a convex annular shoulder (21), the outer side of the valve core (2) is sleeved with an annular sealing ring (7), the left end of the sealing ring (7) is abutted against the shoulder (21), and when the valve core (2) moves rightwards under the action of the elasticity of the spring (3), the sealing ring (7) can be abutted against the left end port of the second guide hole (13 b) and seal the second guide hole (13 b).

6. A gas shut-off valve according to claim 1 or 2 or 3, wherein the right end of the spool (2) is rod-shaped, and the end of the right end of the spool (2) has a spherical surface.

7. A gas shut-off valve as in claim 1 or 2 or 3, wherein the guide surface (41) is a conical surface.

8. A gas shut-off valve according to claim 1, 2 or 3, characterized in that a magnet (8) and an energizing coil (9) are also fixed in the valve body (1), the valve rod (4) is of an integrated structure, an iron core (10) is fixed at the outer end of the valve rod (4), the iron core (10) extends out of the valve body (1) partially, when the valve rod (4) moves towards the inner end, the iron core (10) is close to the magnet (8) and can be adsorbed and positioned by the magnet (8), and when the energizing coil (9) is energized, a force for driving the valve rod (4) to move towards the outer end can be exerted on the iron core (10).

9. A gas shut-off valve according to claim 2 or 3, wherein the guide seat (13) is located in the inlet end (11).