CN2539026Y - Safety valve for gas pipeline - Google Patents

Abstract

The utility model relates to a relief valve used by gas pipes, belonging to a technical field of switch valves, which aims to solve a technical problem that the switch valve arranged in the gas pipes can be closed quickly, safely and firmly in abnormal situations such as a gas leakage situation. The technical proposal is that: a triple valve in which two air cavities and a blow vent are arranged is provided with a solenoid valve by a joint; a static iron core, a joint sleeve, a moving iron core, a push rod, a cushion, a spring and a sealing ring are successively arranged in the intracavity of the solenoid vale; steps on the joint sleeve, steel balls in a plurality of horizontal trough holes which are arranged on the push rod, and the lower end of the moving iron core form a clutch structure between the push rod and the moving iron core; a reset button and a brute force spring are arranged at the upper part of the static iron core; when the cushion is close or moved away from the blow vent the gas in the pipeline can be supplied or interrupted. The utility model has the advantages of fast action, safety, reliability and low cost.

Description

Safety valve for gas pipeline

Technical Field

The utility model relates to a gas ooff valve technical field, especially a relief valve that gas pipeline used.

Background

At present, combustible gases such as natural gas, coal gas, liquefied petroleum gas and the like conveyed by pipelines are commonly used in urban resident households, and great convenience is brought to life. However, in the use process, especially in the gas stove and the indoor gas hose which are used for a long time and the joints between the gas stove and the indoor gas hose, the gas leakage may be caused by damage, poisoning may be caused if the gas leakage is slight, and explosion may be caused if the gas leakage is serious, so that the loss of life and property may be caused. Here, some rooms with gas appliances will also be equipped with gas leakage detection sensors, over-temperature detectors and their alarms to inform nearby personnel to turn off the main switch on the gas pipeline by hand. The operation mode brings serious defects of slow accident handling, lack of safety guarantee and the like.

Disclosure of Invention

The to-be-solved technical problem of the utility model is that can directly establish the ooff valve in the gas main pipeline and close total air supply through well-known gas leak detection, overtemperature detection and the quick safe and reliable nature control of controlling means when using the abnormal conditions such as gas leakage to take place in the gas process.

The utility model provides a technical solution is like this: a safety valve for a gas pipeline comprises a three-way valve body 13 in threaded connection with the gas pipeline, wherein the three-way valve body 13 is provided with a gas inlet 17 and a gas outlet 12, the middle part of the inner cavity of the three-way valve body 13 is provided with a vent 15, a 1 st gas cavity 16 is arranged in the inner cavity between the gas inlet 17 and the vent 15, a 2 nd gas cavity 14 is arranged in the inner cavity between the gas outlet 12 and the vent 15, and an electromagnetic valve is arranged above the vent 15 and fixedly connected to the three-way valve body 13 through a connector body 8; the upper part of the electromagnetic valve is provided with a reset button 1, a static iron core 2 and a strong spring 22, the middle part of the electromagnetic valve is provided with an electromagnetic coil 4, a connecting sleeve 5, a movable iron core 6, a spring 20 and a shell 3, the lower part of the electromagnetic valve is provided with a push rod 9, a steel ball 7, a spring 19 and a rubber cushion 11, the reset button 1 is embedded on the upper part of the movable iron core 2, the strong spring 22 is arranged between the reset button 1 and the inner side of the upper part of the shell 3, the movable iron core 6, the push rod 9 and the push rod 9 are sequentially arranged below the static iron core 2, the movable iron core 9 and the rubber cushion 11 are arranged in an inner cavity of a joint body 8, the connecting sleeve 5 with a step is movably matched with the joint body, the lower part of the static iron core 2, the movable iron core 6 and the push rod 9 are arranged in the connecting sleeve and are sleeved with the connecting sleeve, the lower part of the movable iron core 6 is, a spring 20 is arranged between the static iron core 2 and the movable iron core 6, at least two uniformly distributed circular through holes are arranged at a horizontal position on the upper part of the cylindrical push rod 9, a steel ball 7 is arranged in each through hole, and a spring 19 is arranged between the lower end of the joint body 8 and a gasket sleeve 10 embedded at the top of the rubber gasket 11. The lower end of the push rod 9 is movably hooked with the rubber mat 11. The solenoid valve coil 4 is fitted in a cavity formed by the housing 3 and the joint body 8. And an O-shaped sealing ring 18 is arranged at the joint of the three-way valve body 13 and the joint body 8.

Compared with the prior art, the utility model discloses following beneficial effect has: compact structure, quick action, safety, reliability and lower cost.

Drawings

The present invention is further illustrated by the following examples. Wherein,

fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

Referring to fig. 1, the safety valve installed in a household gas main pipeline comprises a three-way valve body 13, an electromagnetic valve, a joint body 8, a reset button 1, a push rod 9, a rubber gasket 11, springs 19, 20 and 22, and sealing rings 18 and 21, wherein the electromagnetic valve comprises a coil 4, a static iron core 2 and a movable iron core 6. When a serious gas leakage phenomenon occurs in a gas appliance, a gas pipeline and a switch in a kitchen or a bathroom, the electromagnetic valve is driven to work through the external gas leakage detection and control device, namely the electromagnetic valve coil 4 is electrified to act, the movable iron core 6 moves upwards, at the moment, four stainless steel balls 7 which are arranged in four through holes uniformly distributed at the upper part of the push rod 9 and are opposite to the stages of the connecting sleeve 5 have free moving spaces, the four steel balls 7 can move inwards for a certain distance, under the action of the spring 19, the push rod 9, the gasket sleeve 10 and the rubber gasket 11 move downwards, so that the rubber gasket 11 seals and tightly closes the vent 15 in the three-way valve body 13, and at the moment, the 1 st gas cavity 16 and the 2 nd gas cavity 14 in the three-way valve body 13 have larger pressure difference, so that the sealing effect of the rubber gasket 11 is good.

After abnormal phenomena are eliminated, the vent 15 of the three-way valve body 13 needs to be opened, so that gas can smoothly supply gas from the gas inlet 17 through the vent 15 and then from the gas outlet 12, at the moment, the reset button 1 is pressed down by hand, the static iron core 2 pushes the movable iron core 6 and the connecting sleeve 5 to move downwards, the cylinder at the lower part of the movable iron core 6 is inserted into the central points of the four steel balls 7 and forces the central points into the through holes to reset, the steel balls 7 are hooked by the stages of the connecting sleeve 5, and the push rod 9 is fixedly connected with the movable iron core 6. When the reset button 1 is released, the static iron core 2, the movable iron core 6, the connecting sleeve 5, the push rod 9 and the rubber pad 11 move upwards together to reset by means of the elasticity of the strong spring 22, and the air vent 15 is opened. The safety valve has the advantages of crisp and safe action, automatic closing of the air passage when a dangerous accident occurs, and manual opening of the air passage after the accident is eliminated.

Claims (4)

1. The utility model provides a relief valve that gas pipeline used, includes tee bend valve body (13) with gas pipeline threaded connection, this tee bend valve body (13) are equipped with air inlet (17) and gas outlet (12), and its inner chamber middle part is equipped with blow vent (15), the inner chamber is 1 st air cavity (16) between air inlet (17) and blow vent (15), and the inner chamber is 2 nd air cavity (14), its characterized in that between gas outlet (12) and blow vent (15): an electromagnetic valve is arranged above the air vent (15) and is fixedly connected to the three-way valve body (13) through a joint body (8); the electromagnetic valve is characterized in that a reset button (1), a static iron core (2) and a strong spring (22) are arranged on the upper portion of the electromagnetic valve, an electromagnetic coil (4), a connecting sleeve (5), a movable iron core (6), a spring (20) and a shell (3) are arranged in the middle of the electromagnetic valve, a push rod (9), a steel ball (7), a spring (19) and a rubber pad (11) are arranged on the lower portion of the electromagnetic valve, the reset button (1) is embedded on the upper portion of the movable iron core (2), the strong spring (22) is arranged between the reset button (1) and the inner side of the upper portion of the shell (3), the movable iron core (6), the push rod (9) and the rubber pad (11) are sequentially arranged below the static iron core (2), the connecting sleeve (5) which is movably matched with the static iron core (2), the movable iron core (6) and the push rod (9) are arranged in the connecting sleeve (, insert in push rod (9) column casing, its subordinate's cylinder is greater than with push rod (9) column casing inner wall interval adapter sleeve (5) step radial distance is equipped with O type sealing washer (21) between quiet iron core (2) lower part and joint body (8) upper portion, is equipped with spring (20) between quiet iron core (2) and the movable iron core (6), and a push rod (9) upper portion horizontal position of column casing shape is equipped with the circular through-hole of two at least equipartitions, is equipped with one steel ball (7) in every through-hole, it is equipped with spring (19) to connect body (8) lower extreme and inlay between cushion ring cover (10) at cushion (11) top.

2. The safety valve for a gas pipe according to claim 1, characterized in that: the lower end of the push rod (9) is movably hooked with the rubber cushion (11).

3. The safety valve for a gas pipe according to claim 1, characterized in that: the electromagnetic valve coil (4) is embedded in a cavity formed by the shell (3) and the joint body (8).

4. The safety valve for a gas pipe according to claim 1, characterized in that: and an O-shaped sealing ring (18) is arranged at the joint of the three-way valve body (13) and the joint body (8).

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