CN205423998U - Safety valve - Google Patents

Abstract

The utility model relates to a safety valve, which comprises: a valve body, which is provided with a first valve body space and a second valve body space; a first valve core, set in the first valve body space and the second valve body space; In the space of the valve body, a memory alloy spring and a first pressure spring are arranged at the upper and lower ends respectively; a second valve core is arranged in the space of the second valve body, and a sealing ball and a second Pressure spring; an upper cover, set above the valve body, and the upper cover has a water inlet end; a lower cover, set under the valve body, and the lower cover is provided with a first water outlet corresponding to the first valve core, corresponding to the second The second valve core is provided with a second water outlet. Compared with the prior art, when a safety valve of the utility model is in use, when the memory alloy spring fails or the pressure inside the valve body exceeds the specified safety range, the water entering the valve body will wash away the sealing ball and flow from the valve body. The second water outlet end flows out of the valve body, thereby reducing the pressure in the valve body to achieve safety protection.

Description

a safety valve

technical field

The utility model relates to a safety valve.

Background technique

There are many valves on the market today that use the temperature sensing characteristics of the memory alloy itself, but if the memory alloy spring fails or the space is sealed, the temperature in the valve body is too high and the pressure in the airtight space increases, the valve body will be broken. There are potential safety hazards, so it is necessary to design a safety valve to solve the above problems.

Utility model content

In order to overcome the above technical problems, the utility model provides a safety valve, which has a simple structure and is safe to use.

The technical solution adopted by the utility model is a safety valve, which includes: a valve body, which is provided with a first valve body space and a second valve body space; a first valve core, which is assembled in the The first valve body space and the second valve body space, and a memory alloy spring and a first pressure spring are respectively assembled at the upper and lower ends; a second valve core is assembled in the second valve body space, and A sealing ball and a second pressure spring are assembled in it; an upper cover is assembled above the valve body, and the upper cover has a water inlet; a lower cover is assembled below the valve body, And the lower cover is provided with a first water outlet corresponding to the first valve core, and is provided with a second water outlet corresponding to the second valve core.

Further, a first sealing ring is provided between the upper cover and the valve body, and a second sealing ring is provided between the lower cover and the valve body.

Further, a third sealing ring is assembled at the lower end of the second valve core.

Compared with the prior art, when a safety valve of the utility model is in use, when the memory alloy spring fails or the pressure inside the valve body exceeds the specified safety range, the water entering the valve body will wash away the sealing ball and flow from the valve body. The second water outlet end flows out of the valve body, thereby reducing the pressure in the valve body to achieve safety protection.

Description of drawings

Fig. 1 is a kind of safety valve of the utility model when the water temperature of water inlet end is outside the temperature value of memory alloy spring, the state of described safety valve;

Fig. 2 is a safety valve of the utility model when the water temperature at the water inlet end is within the temperature value of the memory alloy spring, the state of the safety valve;

Fig. 3 is a state of the safety valve of the utility model when the memory alloy spring fails or the space is sealed.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

As shown in Figure 1, the utility model is a safety valve, which includes: a valve body 1, a first valve core 2, a memory alloy spring 3, a first pressure spring 4, a second valve core 5, One upper cover 6, one lower cover 7.

As shown in Figure 1, the valve body 1 is provided with a first valve body space 11 and a second valve body space 12;

The first valve core 2 is assembled in the first valve body space 11 and the second valve body space 12, and a memory alloy spring 3 and a first pressure spring 4 are respectively assembled at the upper and lower ends.

The second valve core 5 is assembled in the second valve body space 12 , and a sealing ball 51 and a second pressure spring 52 are assembled therein.

The upper cover 6 is assembled above the valve body 1 , and the upper cover 6 has a water inlet 61 .

As shown in Figure 2, the lower cover 7 is assembled under the valve body 1, and the lower cover 7 is provided with a first water outlet 71 corresponding to the first valve core 2, corresponding to the second valve The core 5 is provided with a second water outlet 72 .

A first sealing ring 8 is arranged between the upper cover 6 and the valve body 1, and a first sealing ring 8 is arranged between the lower cover 7 and the valve body 1.

A second sealing ring 9 is provided.

A third sealing ring 53 is assembled on the lower end of the second valve core 5 .

As shown in Figure 1, when the utility model safety valve is in use, when the water temperature entering the water inlet 61 is outside the temperature value of the memory alloy spring 3, the elastic force of the memory alloy spring 3 is smaller than that of the first pressure spring 4, so that the first valve core 2 moves downward under the elastic force of the first pressure spring 4 to seal the first water outlet 71 and make the second sealing ring 9 engage and close with the lower cover 7, Therefore, the water at the water inlet end 61 flows into the lower part of the valve body 1 .

As shown in Figure 2, when the water temperature of the water inlet 61 is within the temperature value of the memory alloy spring 3, the elastic force of the memory alloy spring 3 is greater than the elastic force of the first pressure spring 4, so that the first valve The core 2 moves upward under the elastic force of the memory alloy spring 3 and separates the second sealing ring 9 from the lower cover 7 , so that the water at the water inlet 61 can flow out from the first water outlet 71 of the valve body 1 .

As shown in Figure 3, when the memory alloy spring 3 fails or the space is sealed, the temperature in the valve body 1 is too high and the pressure in the closed space increases, and the inside of the second valve core 5 is increased. After a certain pressure, the water inside the valve body 1 flushes away the sealing ball 51 and flows out of the valve body 1 from the second water outlet 72, thereby reducing the pressure in the valve body 1 to achieve safety protection.

Claims (3)

1. a relief valve, it is characterised in that, including:

One valve body, is provided with one first valve space and one second valve space in it；

One first spool, is mounted in described first valve space and described second valve space, and two ends group respectively sets a memory alloy spring and one first compression spring up and down；

One second spool, is mounted on described second valve space, and in it, group sets a ball sealer and one second compression spring；

One upper cover, is mounted on above described valve body, and described upper cover has a water inlet end；

One lower cover, is mounted on below described valve body, and corresponding described first spool of described lower cover is provided with one first water side, and corresponding described second spool is provided with one second water side.

2. a kind of relief valve as claimed in claim 1, it is characterised in that: it is provided with one first sealing ring between described upper cover and valve body, between described lower cover and valve body, is provided with one second sealing ring.

3. a kind of relief valve as claimed in claim 1 or 2, it is characterised in that: described second spool lower end group sets one the 3rd sealing ring.