Fire prevention type gas valve

Abstract

The utility model discloses a fire prevention type gas valve, which belongs to the field of gas safety and comprises a gas valve consisting of a valve shell, a valve passing component for limiting gas passing and a valve control component for controlling the valve passing component. Compared with the prior art, the gas valve has the advantages that the outside temperature is sensed in real time through the glass ball temperature sensing element, and when the temperature exceeds the standard, the glass ball temperature sensing element is broken, so that the trapezoidal control rod is pressed down immediately under the action of the height reset spring, and the gas valve is closed; compared with an electric temperature control element commonly used at the present stage, the device has better stability in fire disasters.

Description

Technical Field

[0001] This utility model relates to the field of gas safety, specifically to a fire-resistant gas valve. Background Technology

[0002] In modern daily life, people usually use natural gas as fuel for kitchens in apartment buildings. Natural gas pipelines are laid to each floor, and various valves are used to distribute the gas. In order to prevent the gas from exploding in the event of a fire, fireproof gas valves are usually installed before the gas valves enter the kitchen.

[0003] Existing fire-resistant gas valves consist of a valve body, a valve passage assembly that restricts gas flow, and a valve control assembly that controls the valve passage assembly. The height of the trapezoidal control rod is controlled by rotating the height adjustment nut of the valve control assembly above the screw hole post, thereby controlling the passage of the valve passage assembly. In order for the valve control assembly to automatically close in the event of a fire, corresponding electronic sensing elements are usually installed to sense changes in the surrounding temperature.

[0004] The activation of this electronic sensing element depends on electricity. Once the circuit fails, the gas valve can only be shut off manually. However, in a high-temperature fire, the circuit is almost impossible to use normally, which makes the electronic sensing element susceptible to failure in a fire. Utility Model Content

[0005] The technical problem this invention aims to solve is that the valve control components of existing fire-resistant gas valves rely on electricity. However, in a fire, electricity may fail, which could cause the valve control components to fail to respond in a timely manner due to circuit damage.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a fireproof gas valve, comprising a gas valve consisting of a valve body, a valve passage assembly that restricts the passage of gas, and a valve control assembly that controls the passage assembly;

[0007] The valve control assembly includes a trapezoidal control rod for controlling the position of the valve passage assembly, a screw post located above the valve housing for controlling the height, and a height adjusting nut connected to the top of the trapezoidal control rod by a bolt structure. The straight end of the trapezoidal control rod passes through the central through hole of the screw post, and the straight end of the trapezoidal control rod is provided with a height reset spring located inside the valve housing.

[0008] A glass ball temperature sensing element is provided between the height adjustment nut and the top of the trapezoidal control rod via a threaded connection, and several heat-conducting grooves are provided on the side of the screw hole column.

[0009] As an improvement, the top surface of the valve body is open, and the open end of the valve body is provided with a removable sealing cover located below the screw hole post. The trapezoidal control rod passes through the removable sealing cover, and a number of sealing gaskets are provided inside the central through hole of the screw hole post.

[0010] As an improvement, the removable closure cover is connected to the valve body via a bolt structure.

[0011] As an improvement, the valve passage assembly includes a sealing column located on one side of the valve body pipe, a movable sealing block located on one side of the sealing column, a cross sliding rod connected to the movable sealing block by threads, and a sealing spring located on the other side of the sealing column and between the longitudinal column surface of the cross sliding rod. The bottom surface of the movable sealing block is provided with a sealing ring passing through the sealing column, and the bottom surface of the sealing ring through hole of the sealing column is provided with several venting grooves.

[0012] As an improvement, the cross sliding rod is connected to the inclined column of the trapezoidal control rod through a body contact.

[0013] As an improvement, the inner wall of the valve housing and the outer wall of the sealing column are connected by strong adhesive.

[0014] The advantages of this invention compared to existing technologies are as follows: This device uses a glass bulb temperature sensing element to sense the external temperature in real time. When the temperature exceeds the limit, the glass bulb temperature sensing element will break, causing the trapezoidal control rod to immediately press down under the action of the height reset spring, thus closing the gas valve. Compared with the commonly used electric temperature control elements at present, this device has better stability in a fire. Attached Figure Description

[0015] Figure 1 This is a general structural diagram of a fireproof gas valve according to this utility model.

[0016] Figure 2 This is a cross-sectional view of the overall structure of a fire-resistant gas valve according to this utility model.

[0017] Figure 3 This is an exploded view of the valve passage component of a fire-resistant gas valve according to this utility model.

[0018] Figure 4 This is an exploded view of the valve control component of a fire-resistant gas valve according to this utility model.

[0019] As shown in the figure: 1. Gas valve; 11. Valve body; 111. Removable sealing cover; 112. Sealing gasket; 12. Valve passage assembly; 121. Sealing post; 122. Movable sealing block; 123. Cross sliding rod; 124. Cross sliding rod; 125. Sealing ring; 126. Vent groove; 13. Valve control assembly; 131. Trapezoidal control rod; 132. Screw hole post; 133. Height adjusting nut; 134. Height return spring; 2. Glass ball temperature sensing element; 21. Heat conduction groove. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] As per the instruction manual Figure 1 , 2 As shown in Figure 3, a gas valve 1 includes a valve body 11, a valve passage assembly 12 that restricts gas passage, and a valve control assembly 13 that controls the valve passage assembly 12. The valve passage assembly 12 includes a sealing post 121 located on one side of the valve body 11, a movable sealing block 122 located on one side of the sealing post 121, a cross sliding rod 123 threadedly connected to the movable sealing block 122, and a sealing spring 124 located on the other side of the sealing post 121 and between the longitudinal surface of the cross sliding rod 123. The bottom surface of the movable sealing block 122 is provided with a sealing ring 125 passing through the sealing post 121, and the bottom surface of the sealing ring 125 of the sealing post 121 is provided with several vent grooves 126. The cross sliding rod 123 passes through the sealing post 121. The body contacts the inclined column of the trapezoidal control rod 131. The inner wall of the pipe of the valve body 11 is connected to the outer wall of the sealing column 121 by strong adhesive. The sealing column 121 is a hollow structure, and the diameter of the internal through hole is the same as that of the cross end of the cross sliding rod 123. The sealing spring 124 is sleeved on the threaded column of the cross sliding rod 123, and then one side of the threaded column of the cross sliding rod 123 is passed through the inner hole of the sealing column 121. The sealing ring 125 is sleeved on the top of the movable sealing block 122, and then the threaded end of the cross sliding rod 123 is screwed into the threaded hole on the bottom surface of the movable sealing block 122. At this time, the direction of the sealing ring 125 is the sealing port direction of the sealing column 121. Finally, the sealing column 121 is inserted into the pipe of the valve body 11 and strong adhesive is applied for fixation.

[0022] As per the instruction manual Figure 1 , 2As shown in Figure 4, the valve control assembly 13 includes a trapezoidal control rod 131 for controlling the position of the valve passage assembly 12, a threaded post 132 located above the valve housing 11 for controlling the height, and a height adjusting nut 133 connected to the top of the trapezoidal control rod 131 by a bolt structure. The straight end of the trapezoidal control rod 131 passes through the central through hole of the threaded post 132. The straight end of the trapezoidal control rod 131 is provided with a height return spring 134 located inside the valve housing 11. A glass ball temperature sensing element 2 is provided between the height adjusting nut 133 and the top of the trapezoidal control rod 131 by a threaded connection. The side of the threaded post 132 is provided with several heat-conducting grooves 21. The top surface of the valve housing 11 is open, and the open end of the valve housing 11 is provided with a removable sealing cover 111 located below the threaded post 132. The trapezoidal control rod 131 passes through the removable sealing cover 111, and the center of the threaded post 132... Several sealing washers 112 are provided inside the through hole. The height reset spring 134 is sleeved on the straight end of the trapezoidal control rod 131. The straight end of the trapezoidal control rod 131 is then passed through the internal through hole of the removable cover 111. The sealing washers 112 are then sleeved on the straight end of the trapezoidal control rod 131 and inserted into the central through hole groove of the screw hole post 132 to seal the bottom hole of the screw hole post 132. The stud on the bottom surface of the glass bulb temperature sensing element 2 is screwed into the screw hole at the top of the straight rod of the trapezoidal control rod 131. The height adjusting nut 133 is then screwed onto the outer thread of the screw hole post 132. Finally, a screw is passed through the central through hole of the height adjusting nut 133 and screwed into the screw hole at the top of the glass bulb temperature sensing element 2. The removable cover 111 is placed on the top surface of the valve body 11, which is open, and an airtight sealing washer is installed on the open surface. The removable cover 111 is then fixed to the valve body 11 with screws.

[0023] In a specific implementation of this invention, the gas pipeline and the gas stove are respectively connected to the gas inlet and gas outlet on both sides of the valve housing 11. Then, the height adjustment nut 133 is reversed, and the trapezoidal control rod 131 moves upward under the action of the height adjustment nut 133. At the same time, the cross sliding rod 123 connected to the inclined surface of the trapezoidal control rod 131 is pushed forward, so that the sealing ring 125 is separated from the sealing post 121, allowing gas to enter the gas stove from the ventilation groove 126. When a fire occurs outside, the high temperature will be transferred from the heat conduction groove 21 to the glass ball temperature sensing element 2 (the sensing structure of the glass ball temperature sensing element 2 is like the sensing element of a fire sprinkler). After the temperature exceeds the standard, the glass ball temperature sensing element 2 breaks, and the trapezoidal control rod 131 is automatically pressed down under the action of the height reset spring 134. This causes the cross sliding rod 123 to also spring back the sealing ring 125 back into the through hole of the sealing post 121 for sealing, thereby closing the valve.

[0024] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A fireproof gas valve, comprising a gas valve (1) consisting of a valve body (11), a valve passage assembly (12) for restricting gas passage, and a valve control assembly (13) for controlling the valve passage assembly (12); The valve control assembly (13) includes a trapezoidal control rod (131) for controlling the position of the valve passage assembly (12), a threaded post (132) located above the valve housing (11) for controlling the height, and a height adjusting nut (133) connected to the top of the trapezoidal control rod (131) by a bolt structure. The straight end of the trapezoidal control rod (131) passes through the central through hole of the threaded post (132), and the straight end of the trapezoidal control rod (131) is provided with a height reset spring (134) located inside the valve housing (11). Its characteristic is that: A glass ball temperature sensing element (2) is provided between the height adjusting nut (133) and the top of the trapezoidal control rod (131) and is connected by a thread, and a number of heat-conducting grooves (21) are provided on the side of the screw hole post (132).

2. The fire-resistant gas valve according to claim 1, characterized in that: The top surface of the valve housing (11) is open, and the open end of the valve housing (11) is provided with a removable cover (111) located below the screw hole post (132). The trapezoidal control rod (131) passes through the removable cover (111), and a number of sealing gaskets (112) are provided inside the central through hole of the screw hole post (132).

3. A fire-resistant gas valve according to claim 2, characterized in that: The removable closure cover (111) is connected to the valve body (11) by a bolt structure.

4. A fire-resistant gas valve according to claim 1, characterized in that: The valve passage assembly (12) includes a sealing post (121) located on one side of the valve housing (11) pipe, a movable sealing block (122) located on one side of the sealing post (121), a cross sliding rod (123) connected to the movable sealing block (122) by a thread, and a sealing spring (124) located on the other side of the sealing post (121) and between the longitudinal column surface of the cross sliding rod (123). The bottom surface of the movable sealing block (122) is provided with a sealing ring (125) that passes through the sealing post (121), and a plurality of venting grooves (126) are provided on one side of the bottom surface of the through hole on the sealing post (121) through which the sealing ring (125) passes.

5. A fire-resistant gas valve according to claim 4, characterized in that: The cross sliding rod (123) is connected to the inclined column of the trapezoidal control rod (131) through the body contact.

6. A fire-resistant gas valve according to claim 4, characterized in that: The inner wall of the valve housing (11) is connected to the outer wall of the sealing column (121) by strong adhesive.

Images