CN111503339A

CN111503339A - Gas safety valve

Info

Publication number: CN111503339A
Application number: CN202010338041.7A
Authority: CN
Inventors: 程琪
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2020-08-07

Abstract

The invention provides a gas safety valve which comprises a shell, wherein the left end of the shell is spirally connected with a left end cover, and the right end of the shell is spirally connected with a right end cover; an air outlet hole is formed in the middle of the left end cover; an air inlet hole is formed in the middle of the right end cover; a partition plate with an air hole is arranged in the shell, a Z-shaped seat is arranged on the right side of the partition plate, and a gear is rotatably connected in the middle of the Z-shaped seat; the cylinder end of the valve core penetrates through the partition plate and the Z-shaped seat, and the cone end of the valve core is sleeved in the air outlet hole of the left end cover; a pressing rod penetrates through the Z-shaped seat, one end of the pressing rod is connected with the partition plate through a spring, and a positioning groove is formed in the middle of the other end of the pressing rod; racks are respectively embedded at the cylinder ends of the abutting rod and the valve core, and the two racks are respectively meshed with the gear; the middle of the right end cover is detachably connected with a hot melting rod, and the free end of the hot melting rod is pressed in the positioning groove.

Description

Gas safety valve

Technical Field

The invention relates to the technical field of gas use, in particular to a gas safety valve.

Background

At present, liquefied gas tanks or combustible gases, such as natural gas automobiles and other occasions using the liquefied gas tanks or the combustible gases as combustible gases, are generally connected with hoses for arranging pipelines conveniently, if the liquefied gas tanks or the combustible gases are ignited by reasons such as home or automobiles spontaneous combustion, when the fire is strong or people are out of site and close valves which can not close gas pipelines, and gas leakage can not be controlled after the rubber pipes on the fire site are burnt and broken, uncontrollable leakage combustion of the gas can be accelerated, and the danger of explosion of gas storage tanks or liquefied gas tanks can even occur, and the consequences can not be imagined. So, if can in time be in no personnel or need the people to go the operation to close the gas valve and put out a fire the condition and the gaseous safety valve of self-closing, to gas bomb such as protection liquefied gas pitcher, the aggravation that prevents the burning has huge effect, can reduce simultaneously or avoid the injury of personal and property, consequently has great marketing use prospect.

The existing fire-proof safety devices such as safety valves and the like are often provided with sealing rings and have the characteristics of complex structure, high use cost and insufficient safety, and particularly, the safety valves lose the safe fire-proof and leakage-proof effects because the rubber sealing rings are easily melted or burnt in a high-temperature environment. And the utility model can not be used after being used once or being out of service due to self reasons, and the use cost is high.

The patent with the publication number of CN200965085Y discloses a fire-proof safety valve capable of automatically closing a pipeline, wherein one end of a valve core compresses a spring, the other end of the valve core is supported by a hot melting piece, and when the hot melting piece is heated and melted, the spring ejects the valve core to block an air outlet hole, so that the effect of automatically closing the pipeline is achieved. Because the hot melt spare is not set up in the breather pipe, when taking place to catch fire in the breather pipe, need the valve body heat conduction, to heat transfer to the hot melt spare, the pipeline can only be closed to the hot melt spare melts, and this often needs certain time, therefore the effect is not good. Because the fire spread rapidly when the pipeline is on fire, the fire-proof safety valve capable of automatically closing the pipeline has poor performance and cannot achieve good fire-proof effect.

The patent with application publication No. CN102537457A discloses a fire-proof safety valve, which comprises a valve body, a switch valve, a thimble, a joint, a spring, a steel ball, a spring and a ○ -shaped sealing ring, and has the following defects that firstly, the joint is used for combustion, the joint needs to absorb a large amount of heat to melt due to larger thickness, and the record indicates that a channel can be automatically closed after combustion, so a long reaction time is needed, and secondly, the sealing ring is used as a sealing device, so that the sealing ring is generally made of rubber, the safety valve loses the safe fire-proof and leakage-proof effects due to the fact that the rubber sealing ring is easy to melt or combust in a high-temperature environment, and the safety valve cannot be used after self-reason failure or once use, and the use cost is higher.

In addition, in the prior known gas safety valve adopting the hot melting piece, the hot melting piece is used for multiple times, so that the problem of inconvenience in replacement is caused, and a lot of inconvenience is brought to a user.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a gas safety valve.

The invention is realized by the following technical scheme:

the invention provides a gas safety valve which comprises a shell, wherein the left end of the shell is spirally connected with a left end cover, the right end of the shell is spirally connected with a right end cover, and the left end cover and the right end cover are staggered up and down; an air outlet hole is formed in the middle of the left end cover, one end of the air outlet hole is round, and the other end of the air outlet hole is conical; an air inlet is formed in the middle of the right end cover, and the air inlet is integrally arranged in a Y shape in a laid-down manner; a partition plate with an air hole is arranged in the shell, a Z-shaped seat is arranged on the right side of the partition plate, and a gear is rotatably connected in the middle of the Z-shaped seat; also comprises

The cylinder end of the valve core penetrates through the partition plate and the Z-shaped seat, and the cone end of the valve core is sleeved in the air outlet hole of the left end cover; a pressing rod penetrates through the Z-shaped seat, one end of the pressing rod is connected with the partition plate through a spring, and a positioning groove is formed in the middle of the other end of the pressing rod; racks are respectively embedded at the cylinder ends of the abutting rod and the valve core, and the two racks are respectively meshed with the gear; the middle of the right end cover is detachably connected with a hot melting rod, and the free end of the hot melting rod is pressed in the positioning groove.

Preferably, the outer annular surfaces of the left end cover and the right end cover are respectively provided with an external thread, and the insides of the left end and the right end of the shell are respectively provided with an internal thread which is in spiral fit with the external thread.

Preferably, the partition plate and the Z-shaped seat are provided with communicating holes for the rod body end of the valve core to slidably penetrate through; and the Z-shaped seat is provided with a through hole for the pressing rod to penetrate through in a sliding manner.

Preferably, the gear is rotatably connected with the middle of the Z-shaped seat through a rotating shaft.

Preferably, the hot melt rod is a polyethylene plastic rod, and the left side in the middle of the right end cover is provided with a plug hole for fastening and plugging the hot melt rod.

Preferably, the front end of the air outlet of the left end cover is provided with a small-diameter excircle, and the joint of the air outlet of the left end cover and the small-diameter excircle of the left end cover is provided with a structure with a square larger step; the front end of the air inlet of the right end cover is provided with a small-diameter excircle, and the joint of the small-diameter excircle of the right end cover and the large step is of a square structure.

In the embodiment, the hot melting rod is arranged in the vent pipe, so that when accidental fire occurs, the hot melting rod can sense heat at the first time to be fused, the reaction time is fast, the air pipe can be quickly sealed, and the gas safety valve has a better fireproof effect compared with the conventional gas safety valve; the safety valve is free of sealing rubber, and the safety valve cannot lose the safe fireproof and leakage-proof effects because the rubber sealing ring is easy to melt or burn in a high-temperature environment; the invention can be reused only by replacing a low-cost hot melting rod after the gas safety valve is invalid due to self reasons or used once, and compared with the existing gas safety valve, the installation of the hot melting rod is more rapid and convenient, and the use cost is lower.

Drawings

FIG. 1 is a schematic structural view of normal ventilation of a gas safety valve provided by an embodiment of the invention;

fig. 2 is a schematic structural diagram of a gas safety valve closing pipeline provided by the embodiment of the invention.

In the figure: 1-a shell; 2-left end cap; 3-right end cap; 4-a separator; 5-Z-shaped seat; 6-gear; 7-a valve core; 8-a pressing rod; 9-a spring; 10-positioning grooves; 11-a rack; 12-a hot melt bar; 13-plug hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

For the convenience of understanding the gas safety valve provided by the embodiment of the present invention, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, fig. 1 is a schematic structural view of normal ventilation of a gas safety valve according to an embodiment of the present invention.

As shown in figure 1, the gas safety valve comprises a shell 1, wherein a left end cover 2 is spirally connected to the left end of the shell 1, a right end cover 3 is spirally connected to the right end of the shell 1, and the left end cover 2 and the right end cover 3 are staggered up and down. Specifically, external threads are respectively arranged on the outer annular surfaces of the left end cover 2 and the right end cover 3, the external threads are fine-thread external threads, internal threads which are in threaded fit with the external threads are respectively arranged inside the left end and the right end of the shell 1, and the internal threads are fine-thread internal threads.

With reference to fig. 1, an air outlet is formed in the middle of the left end cover 2, one end (left end in the figure) of the air outlet is circular, and the other end (right end in the figure) of the air outlet is conical. An air inlet is arranged in the middle of the right end cover 3, and the air inlet is integrally arranged in a Y shape. In addition, a partition plate 4 with an air hole is fixedly arranged in the shell 1, a Z-shaped seat 5 is arranged on the right side of the partition plate 4, a gear 6 is rotatably connected in the middle of the Z-shaped seat 5, and the gear 6 is rotatably connected with the middle of the Z-shaped seat 5 through a rotating shaft.

In the embodiment of the present invention, the present invention further includes a valve core 7, a column end of the valve core 7 penetrates through the partition plate 4 and the Z-shaped seat 5, specifically, a communication hole for a rod end of the valve core 7 to slidably penetrate is disposed on the partition plate 4 and the Z-shaped seat 5 (in the illustration, one end of the Z-shaped seat 5), and a cone end of the valve core 7 is sleeved in the air outlet hole of the left end cover 2. A pressing rod 8 penetrates through the Z-shaped seat 5, a through hole for the pressing rod 8 to penetrate through in a sliding manner is formed in the Z-shaped seat 5 (the other end of the Z-shaped seat 5 in the figure), one end of the pressing rod 8 is fixedly connected with the partition plate 4 through a spring 9, and a positioning groove 10 is formed in the middle of the other end of the pressing rod 8.

In addition, racks 11 are respectively embedded at the cylinder ends of the abutting rod 8 and the valve core 7, and the two racks 11 are respectively meshed with the gear 6. The middle of the right end cover 3 is detachably connected with a hot melting rod 12, and the free end of the hot melting rod 12 is pressed in the positioning groove 10. It should be noted that the middle width of the Z-shaped seat 5 in the present invention is smaller than the width of the two ends thereof, and the middle of the Z-shaped seat 5 is recessed downward relative to the two ends of the Z-shaped seat 5, so as to ensure that the gear 6 can be engaged with the pressing rod 8 penetrating through the Z-shaped seat 5 and the rack 11 on the column end of the valve core 7 respectively after being installed. Of course, a through groove may be formed in the middle of the Z-shaped seat 5, the rotating shaft is fixedly installed in the through groove, and the gear 6 is rotatably sleeved on the rotating shaft. It should be noted that the positioning slot 10 is a tapered slot, and the size of the opening end of the tapered slot is larger than that of the inner end of the tapered slot, so that the hot-melt rod 12 can be more conveniently pressed against the positioning slot 10.

In the embodiment of the present invention, the hot melt rod 12 is a polyethylene plastic rod, the left side of the middle of the right end cover 3 is provided with an insertion hole 13 for the hot melt rod 12 to be inserted and fastened (i.e. to be installed in an interference fit), specifically, the left side of the right end cover 3 is provided with a boss structure, and the insertion hole 13 is a blind hole and is centrally arranged on the boss structure. It should be noted here that the valve body 7 is disposed coaxially with the left end cap 2, and the pressing rod 8 is disposed coaxially with the right end cap 3. According to the arrangement, when the right end cover 3 is installed to the right end of the shell 1, the hot melting rod 12 is firstly tightly inserted into the insertion hole 13 in the right end cover 3 in a fastening mode, the right end cover 3 and the pressing rod 8 are coaxially arranged, when the right end cover 3 is screwed, the other end of the hot melting rod 12 can be accurately inserted into the positioning groove 10, the hot melting rod 12 rotates along with the right end cover 3 and presses the pressing rod 8 along with the screwing of the right end cover 3 into the shell 1, so that the pressing rod 8 moves leftwards relative to the gear 6, the pressing rod 8 and the rack 11 of the cylindrical end of the valve element 7 are respectively meshed with the gear 6, the valve element 7 moves rightwards relative to the gear 6, a gap is formed between the conical end of the valve element 7 and the air outlet hole of the left end cover 2, air can flow, and the safety.

When the hot melt rod 12 is heated to a temperature not exceeding 100 ℃, namely, when a fire disaster or high temperature occurs, the hot melt rod 12 is perfectly arranged in the inserting hole 13 on the left side of the right end cover 3 in an interference fit mode. In order to enable the hot melt rod 12 to be more firmly inserted into the insertion hole 13, one end of the hot melt rod 12 can be tapered, so that the hot melt rod 12 can be conveniently inserted into the insertion hole 13, and interference fit can be easily generated after the hot melt rod 12 is inserted into the insertion hole 13. And the other end of the hot melting rod 12 can be a hemisphere, and the other end of the hemisphere is convenient to rotate relative to the positioning groove 10. When the hot melting rod 12 is installed, the pressing rod 8 moves leftwards relative to the gear 6, so that the spring 9 connected between the pressing rod 8 and the partition plate 4 is compressed to generate elastic potential energy, namely the spring 9 generates elastic potential energy when gas can circulate and the safety valve is in a normal working state.

When a fire occurs, the hot melting rod 12 is heated to over 100 degrees and melted, the hot melting rod 12 does not have a pressing effect on the pressing rod 8, the compressed spring 9 recovers elastic deformation, the spring 9 recovers elastic deformation to push the pressing rod 8 to move rightwards, due to the meshing effect of the gear 6 and the rack 11, the valve core 7 moves leftwards, and the air outlet hole in the left end cover 2 is blocked by the cone end of the valve core 7, so that gas leakage can be prevented, and further, the fire source can be cut off. After a fire disaster happens, the hot melt rod 12 can be directly used after the right end cover 3 is opened and replaced, the installation is convenient and fast, and the effect of repeated use is achieved.

In the embodiment of the invention, in order to improve the safety and the reusability of the safety valve, the shell 1, the left end cover 2, the right end cover 3, the partition plate 4, the Z-shaped seat 5, the gear 6, the valve core 7, the pressing rod 8, the spring 9 and the rack 11 are all made of metal materials, and the hot melting rod 4 is made of polyethylene plastic materials which can be dissolved instantly when heated. And, 2 gas outlet front ends of left end housing set up to minor diameter excircles, set up to great step for square structure with 2 minor diameter excircles junctions of left end housing. The front end of the air inlet of the right end cover 3 is set to be a small-diameter excircle, and the joint of the right end cover 3 and the small-diameter excircle is set to be a square structure with a larger step. This allows the square structure to be twisted using a monkey wrench to tighten the left and right end caps 2 and 3, respectively, to the housing 1. In addition, a layer of leakproof pipeline thread sealing tape is respectively attached to the external threads on the outer annular surfaces of the left end cover 2 and the right end cover 3, and the sealing performance of the leakproof pipeline thread sealing tape is further ensured during screwing.

As can be seen from the above description, the hot melt rod is arranged in the vent pipe, so that when accidental fire occurs, the hot melt rod can be fused by sensing heat at the first time, the reaction time is fast, the air pipe can be quickly sealed, and the gas safety valve has a better fireproof effect compared with the existing gas safety valve; the safety valve is free of sealing rubber, and the safety valve cannot lose the safe fireproof and leakage-proof effects because the rubber sealing ring is easy to melt or burn in a high-temperature environment; the invention can be reused only by replacing a low-cost hot melting rod after the gas safety valve is invalid due to self reasons or used once, and compared with the existing gas safety valve, the installation of the hot melting rod is more rapid and convenient, and the use cost is lower.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas safety valve, comprising: the left end of the shell is spirally connected with a left end cover, the right end of the shell is spirally connected with a right end cover, and the left end cover and the right end cover are staggered up and down; an air outlet hole is formed in the middle of the left end cover, one end of the air outlet hole is round, and the other end of the air outlet hole is conical; an air inlet is formed in the middle of the right end cover, and the air inlet is integrally arranged in a Y shape in a laid-down manner; a partition plate with an air hole is arranged in the shell, a Z-shaped seat is arranged on the right side of the partition plate, and a gear is rotatably connected in the middle of the Z-shaped seat; also comprises

2. The gas safety valve according to claim 1, wherein the outer annular surfaces of the left end cover and the right end cover are respectively provided with an external thread, and the insides of the left end and the right end of the shell are respectively provided with an internal thread which is in threaded fit with the external thread.

3. The gas safety valve according to claim 1, wherein the partition plate and the Z-shaped seat are provided with a communication hole for the rod body end of the valve core to slide and penetrate through; and the Z-shaped seat is provided with a through hole for the pressing rod to penetrate through in a sliding manner.

4. The gas safety valve of claim 1, wherein the gear is rotatably connected to the Z-shaped seat by a shaft.

5. The gas safety valve according to claim 1, wherein the hot melt rod is a polyethylene plastic rod, and the left side of the middle of the right end cover is provided with an insertion hole for the hot melt rod to be inserted and connected tightly.

6. The gas safety valve according to claim 1, wherein the front end of the air outlet of the left end cover is provided with a small-diameter outer circle, and the joint of the air outlet of the left end cover and the small-diameter outer circle of the left end cover is provided with a structure that a larger step is square; the front end of the air inlet of the right end cover is provided with a small-diameter excircle, and the joint of the small-diameter excircle of the right end cover and the large step is of a square structure.