WO2019109792A1

WO2019109792A1 - Dual-protection safety valve

Info

Publication number: WO2019109792A1
Application number: PCT/CN2018/115917
Authority: WO
Inventors: 郁蔓菲
Original assignee: 郁蔓菲
Priority date: 2017-12-06
Filing date: 2018-11-16
Publication date: 2019-06-13
Also published as: CN207514315U

Abstract

A dual-protection safety valve, comprising a housing (10) and a pressure reducing bin (20). The housing (10) comprises an air inlet (11), an air outlet (12), and an air duct (13). The air duct (13) is provided with an explosion-proof rod (30) capable of moving horizontally. A first compression spring (32) for enabling the explosion-proof rod (30) to have a trend of moving left is assembled for the explosion-proof rod (30). Meanwhile, a blind hole (31) extending right is formed on a left end surface of the explosion-proof rod (30). A ventilation hole (311) is provided on a side wall of the blind hole (31), and a transition hole (131) extending upward is provided on the right of the blind hole (13). The ventilation hole (311) matches the transition hole (131). A sliding hole (14) is provided on a lower portion of the housing (10). An upper end of the sliding hole (14) is connected to a through hole (141). The upper end of the through hole (141) is in communication with the air duct (13), and an upper opening of the through hole (141) is located on a lower left side of the explosion-proof rod (30). Meanwhile, the air duct (13) is provided with a pushrod (50) capable of moving vertically. A third compression spring (51) for enabling the pushrod (50) to have a trend of moving upward is assembled for the pushrod (50), and the upper end of the pushrod (50) matches a lower opening of the through hole (141). A lower end of the pushrod (50) extends to the exterior of the housing (10). The dual-protection safety valve has the characteristic of high safety factor.

Description

Double protection safety valve

Technical field

The invention relates to the technical field of valve tools, in particular to a double protection safety valve.

Background technique

The cassette furnace is a heating stove that is often used in homes and restaurants. Typically, the cassette furnace supplies gas gas through a small gas cylinder (or gas cylinder), and the body of the gas cylinder is stuck in the cassette furnace. That is, most of the cassette furnaces are provided with a gas cylinder locking lever. When the gas cylinder locking lever is pressed downward, the gas cylinder is clamped in the cassette furnace, and the gas tank and the cassette furnace are in communication. At the same time, most of the cassette furnaces are provided with an overpressure release lever capable of lifting the gas cylinder tightening lever after the spring is lifted, and when the overpressure release lever is pressed, the gas cylinder can be separated from the cassette furnace. . In order to ensure the safety of use, the explosion-proof device is also installed in the cassette furnace. When the pressure provided by the gas cylinder to the cassette furnace is too large, the explosion-proof device will start to cut off the connection between the gas tank and the cassette furnace.

The present invention is a further improvement of conventional explosion-proof devices.

Summary of the invention

In view of the deficiencies of the prior art described above, it is an object of the present invention to provide a double-protected safety valve which has a high safety factor.

In order to achieve the above object, the technical solution adopted by the present invention is: a double-protected safety valve including a housing and a decompression chamber, the housing having an air inlet, an air outlet and an air passage, the air inlet communicating with the air passage At the left end, the air outlet is connected to the decompression chamber,

An explosion-proof rod capable of moving left and right is disposed in the air passage, and the explosion-proof rod is provided with a first compression spring having a tendency to move to the left, and a blind hole extending to the right is formed on the left end surface of the explosion-proof rod. a venting hole is formed in a sidewall of the blind hole, and a rightward portion of the air passage is provided with an upwardly extending transition hole, and the venting hole and the transition hole are matched;

a control panel capable of moving back and forth is disposed in the housing, the control panel is provided with a second compression spring having a tendency to move backward, and the control panel has a hook body located in the housing and located outside the housing a button, and at the same time, the explosion-proof rod is provided with a groove, and the hook body and the groove are matched;

a sliding hole is disposed in a lower portion of the housing, and a through hole is connected to the upper end of the sliding hole. The upper end of the through hole communicates with the air passage, and an upper opening of the through hole is located at a lower left side of the explosion-proof rod. a ram capable of moving up and down is disposed in the air passage, the ejector is provided with a third compression spring having a tendency to move upward, and an upper end of the ejector is matched with a lower end opening of the through hole, the ejector The lower end extends to the exterior of the housing.

The right end of the explosion-proof rod extends to the outside of the housing.

A first sealing ring, a second sealing ring and a third sealing ring are disposed on the explosion-proof rod from left to right, and an upper opening of the venting hole is located between the second sealing ring and the third sealing ring.

With the above structure, the present invention has an advantage over the prior art in that the safety factor is high. The double-protected safety valve of the invention closes the air flow passage by using the explosion-proof rod and opens the gas tank through the top rod, which is equivalent to forming double protection, which greatly improves the safety factor of the cassette furnace in use. That is, the double-protected safety valve of the present invention integrates two explosion-proof modes, and when one fails, the other can provide protection.

DRAWINGS

The present invention is further described below in conjunction with the accompanying drawings and embodiments:

Figure 1 is a front cross-sectional view of a double-protected safety valve according to an embodiment of the present invention (in an explosion-proof starting state);

Figure 2 is a perspective view of a double-protected safety valve according to an embodiment of the present invention (in an explosion-proof starting state, and the housing is not shown);

Figure 3 is a front cross-sectional view of the double-protected safety valve of the embodiment of the present invention (under explosion-proof state);

4 is a perspective view of a double-protected safety valve according to an embodiment of the present invention (in an explosion-proof, unactivated state, and a housing is not shown).

Detailed ways

For example, as shown in Figures 1 to 4: a double protected safety valve comprising a housing 10 and a decompression chamber 20. The casing 10 has an intake port 11, an air outlet 12, and an air passage 13, which communicates with the left end of the air passage 13, and the air outlet 12 communicates with the decompression chamber 20. That is, only when the intake port 11 and the air outlet 12 are in communication, the gas in the gas cylinder can enter the cassette furnace.

More specifically:

An air blasting rod 30 capable of moving left and right is provided in the air passage 13. Obviously, the left circumferential surface of the explosion-proof rod 30 should form a sealing fit with the inner side wall of the air passage 13. The explosion-proof rod 30 is provided with a first compression spring 32 that has a tendency to move to the left, and the first compression spring 32 can be sleeved on the explosion-proof rod 30. At the same time, the left end surface of the explosion-proof rod 30 is formed with a blind hole 31 extending to the right, and the side wall of the blind hole 31 is provided with a vent hole 311. And, the right side wall of the air passage 13 is provided with an upwardly extending transition hole 131. The venting hole 311 and the transition hole 131 are matched. That is, in the explosion-proof unactivated state, the upper end opening of the vent hole 311 and the lower end opening of the transition hole 131 are aligned or otherwise communicated, so that the gas entering the air passage 13 via the air inlet 11 can pass through the The vent hole 311 and the transition hole 131 enter the air outlet 12 . On the other hand, when the pressure in the air inlet 11 is excessively large, the high-pressure gas necessarily pushes the explosion-proof rod 30 to the right, and then the vent hole 311 and the transition hole 131 cannot continue to be aligned, thereby correspondingly cutting off the air passage 13 and The communication of the air outlet 12 forms a first heavy explosion protection.

A control panel 40 that is movable back and forth is disposed in the housing 10. In the present embodiment, the definition of the front-rear direction is mainly to indicate that the front-rear direction is perpendicular to the left-right direction. The control panel 40 is provided with a second compression spring 43 that has a tendency to move backwards, and the control panel 40 has a hook body 41 located inside the housing 10 and a dial 42 located outside the housing 10. At the same time, the explosion-proof rod 30 is provided with a groove 33, and the hook body 41 and the groove 33 are matched. That is, once the explosion-proof lever 30 is moved to the right, the hook body 41 can be hooked in the groove 33, ensuring that the explosion-proof lever 30 is stably located to the right. When a reset is required, it is only necessary to manually toggle the button 42.

A sliding hole 14 is defined in a lower portion of the housing 10. A through hole 141 is connected to the upper end of the sliding hole 14. Obviously, the cross-sectional area of the through hole 141 is necessarily smaller than the sectional area of the sliding hole 14. The upper end of the through hole 141 communicates with the air passage 13 , and the upper opening of the through hole 141 is located at the lower left side of the explosion-proof lever 30 . That is, the through hole 141 is not blocked regardless of where the explosion-proof lever 30 is located. For example, a step is provided in the air passage 13 , an upper opening of the through hole 141 is located on the left side of the step, and the explosion-proof lever 30 is located on the right side of the step. At the same time, the air passage 13 is provided with a jack 50 that can move up and down. The jack 50 is provided with a third compression spring 51 that has a tendency to move upward. The third compression spring 51 can be sleeved on the jack 50. The upper end of the jack 50 is matched with the lower end opening of the through hole 141. That is, when the jack 50 is located relatively above, or in an explosion-proof unactivated state, the upper end surface of the jack 50 may block the lower end opening of the through hole 141. The lower end of the jack 50 extends to the outside of the housing 10. That is, at the time of use, the lower end of the jack 50 can be placed on the side of the gas can. Once the pressure in the air passage 13 is too large, the jack 50 is inevitably subjected to a downward impact force, and then the jack 50 will immediately move downward, and the lower end of the jack 50 will be pushed to push the overpressure. The lever bounces off, making it impossible for the gas tank to communicate with the cassette furnace. In this way, a second heavy explosion protection is formed.

optimized:

The right end of the explosion-proof lever 30 extends to the outside of the housing 10. That is, when the explosion-proof lever 30 needs to be manually reset, there may be a certain pressure in the air passage 13, and the user needs to toggle the button 42 so that the hook 41 does not restrict the groove 33. The explosion-proof lever 30 is pressed inwardly to urge the explosion-proof lever 30 to be reset.

A first seal ring 341, a second seal ring 342, and a third seal ring 343 are provided on the explosion-proof rod 30 from left to right. The upper opening of the venting hole 311 is located between the second sealing ring 342 and the third sealing ring 343. That is, in the explosion-proof unactivated state, when the upper end opening of the vent hole 311 and the lower end opening of the transition hole 131 are aligned or communicated, the second seal ring 342 and the third seal ring 343 ensure that the gas can enter smoothly. The air outlet 12 is inside; in the explosion-proof starting state, the first sealing ring 341 and the second sealing ring 342 ensure that the gas is in a cut-off state.

In addition:

In the specific use, the initial elastic force of the first compression spring 32 and the third compression spring 51 can be adjusted to determine which explosion-proof first-time start is required when the explosion-proof is required.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are directly or indirectly applied to other related The technical field is equally included in the scope of patent protection of the present invention.

Claims

The double-protected safety valve comprises a casing (10) and a decompression chamber (20) having an air inlet (11), an air outlet (12) and an air passage (13), the air inlet ( 11) communicating with the left end of the air passage (13), the air outlet (12) is connected to the decompression chamber (20), characterized in that: the air passage (13) is provided with an explosion-proof rod capable of moving left and right (30) The explosion-proof rod (30) is provided with a first compression spring (32) which has a tendency to move to the left, and a blind hole (31) extending to the right is formed on the left end surface of the explosion-proof rod (30). A vent hole (311) is disposed on a sidewall of the blind hole (31), and a rightward extending transition hole (131) is provided in a right portion of the air passage (13), the vent hole (311) and the transition hole (131) mating; the housing (10) is provided with a control panel (40) capable of moving back and forth, the control panel (40) being provided with a second compression spring (43) having a tendency to move backwards, and The control board (40) has a hook body (41) located in the housing (10) and a dial (42) located outside the housing (10), and the explosion-proof rod (30) is provided with a groove. (33), the hook body (41) and the groove (33) are matched; a lower portion of the housing (10) is provided with a sliding hole (14), The upper end of the hole (14) is connected with a through hole (141), the upper end of the through hole (141) is connected to the air passage (13), and the upper opening of the through hole (141) is located at the left of the explosion-proof rod (30) a lower side of the square, at the same time, the air passage (13) is provided with a top rod (50) capable of moving up and down, the top rod (50) is provided with a third compression spring (51) for causing an upward movement tendency, and the The upper end of the jack (50) matches the lower end opening of the through hole (141), and the lower end of the jack (50) extends to the outside of the housing (10).
A double-protected safety valve according to claim 1, characterized in that the right end of the explosion-proof rod (30) extends to the outside of the casing (10).
The double-protected safety valve according to claim 1, wherein the explosion-proof rod (30) is provided with a first sealing ring (341), a second sealing ring (342), and a third sealing from left to right. A ring (343), an upper opening of the venting hole (311) is located between the second sealing ring (342) and the third sealing ring (343).