CN107345584A - Vacuum-proof pressure release valve and water heater - Google Patents

Abstract

The invention discloses a vacuum-proof pressure release valve and a water heater, and relates to the technical field of water heaters. This prevent vacuum relief valve is including the valve body that is equipped with the inner chamber, including inlet and liquid outlet on the valve body, be equipped with the gas flow channel and the liquid flow channel with the inner chamber intercommunication on the lateral wall of valve body, be equipped with the vacuum case subassembly of preventing of its switching of control in the gas flow channel, be equipped with the pressure release case subassembly of its switching of control in the liquid flow channel. Still protect a water heater simultaneously, include the water tank and with the pipeline of water tank connection, install foretell vacuum relief valve of preventing on the pipeline. The vacuum-proof pressure release valve provided by the invention is provided with the vacuum-proof valve core assembly and the pressure release valve core assembly, can prevent the water tank of the water heater from being shriveled and burst, can reduce the installation of the valve, is simple to assemble, reduces leakage points and saves the cost.

Description

Anti-vacuum pressure relief valve and water heater

technical field

The invention relates to the technical field of water heaters, in particular to an anti-vacuum pressure relief valve and a water heater.

Background technique

In the prior art, the water tank of the water heater mostly adopts a closed water tank, which can realize central water supply and multiple water outlets. However, the fatal flaw of the closed water tank is that the pressure of the water tank is limited. When the internal water pressure is too large, the water tank will burst. ACCIDENT.

In order to solve the above problems, in the prior art, valves with various functions are often installed on the pipeline, such as pressure relief valves, vacuum valves, etc. Combined assembly, the assembly process is complicated, there are many leakage points, and a variety of valves are used, the cost will increase.

Contents of the invention

The purpose of the present invention is to provide an anti-vacuum pressure relief valve, which can prevent the water tank of the water heater from being damaged due to excessive internal water pressure or negative pressure, and can save costs and reduce leakage points.

Another object of the present invention is to provide a water heater having the above-mentioned anti-vacuum pressure relief valve.

For reaching this purpose, the present invention adopts following technical scheme:

An anti-vacuum pressure relief valve, comprising a valve body with an inner cavity, the valve body includes a liquid inlet and a liquid outlet, and a gas circulation channel communicating with the inner cavity is provided on the side wall of the valve body and a liquid circulation channel, the gas circulation channel is provided with an anti-vacuum valve core assembly to control its opening and closing, and the liquid circulation channel is provided with a pressure relief valve core assembly to control its opening and closing.

As a preferred solution of the above-mentioned anti-vacuum pressure relief valve, a check valve core assembly is arranged in the inner cavity.

As a preferred solution of the above-mentioned anti-vacuum pressure relief valve, the anti-vacuum valve core assembly includes an anti-vacuum valve core and an anti-vacuum spring, and the side walls at both ends of the gas circulation channel are respectively provided with first An annular protrusion and a second annular protrusion, the first annular protrusion is away from the inner cavity, and when there is no gas flow in the gas flow channel, the anti-vacuum valve core leans against the first annular protrusion , one end of the anti-vacuum spring abuts on the anti-vacuum valve core, and the other end abuts on the second annular protrusion.

As a preferred solution of the above-mentioned anti-vacuum pressure relief valve, a first guide rod is connected to the anti-vacuum valve core, and the first guide rod passes through the first annular protrusion.

As a preferred solution of the above-mentioned anti-vacuum pressure relief valve, a sealing rubber ring is provided on the side of the anti-vacuum valve core close to the first annular protrusion.

As a preferred solution of the above-mentioned anti-vacuum pressure relief valve, the pressure relief valve core assembly includes a pressure relief nut, a pressure relief spring and a pressure relief valve core. The third annular protrusion extending radially, the pressure relief nut is threadedly connected to the end of the liquid communication channel away from the inner cavity, when there is no liquid in the liquid communication channel, the pressure relief valve core leans against the On the third annular protrusion, one end of the pressure relief spring abuts against the pressure relief valve core, and the other end abuts against the pressure relief nut.

As a preferred solution of the above-mentioned anti-vacuum pressure relief valve, a second guide rod is connected to the pressure relief valve core, the second guide rod passes through the third annular protrusion, and the pressure relief valve core is close to One side of the third annular protrusion is provided with a sealing rubber ring.

As a preferred solution of the above-mentioned anti-vacuum pressure relief valve, the check valve core assembly includes a pin shaft and a baffle plate, the upper end of the baffle plate is provided with a pin hole, and the upper end of the baffle plate is fixed by the pin shaft On the valve body, the lower end of the baffle is a free end, and a fourth annular protrusion is provided on the side wall of the inner chamber upstream of the baffle, and when the liquid stops flowing out, the baffle leans against the On the fourth annular protrusion.

As a preferred solution of the above-mentioned anti-vacuum pressure relief valve, a sealing rubber ring is provided on the side of the baffle near the fourth annular protrusion.

A water heater includes a water tank and a pipeline connected to the water tank, and the above-mentioned anti-vacuum pressure relief valve is installed on the pipeline.

Beneficial effects of the present invention:

The anti-vacuum pressure relief valve in the present invention, by arranging the anti-vacuum component and the pressure relief valve core component on the valve body, makes the anti-vacuum pressure relief valve have the functions of vacuum prevention and pressure relief at the same time, which can prevent the water tank of the water heater from If the pressure is too high, it will be deflated, and at the same time, it can prevent the water tank from bursting due to excessive internal liquid pressure; in addition, the anti-vacuum pressure relief valve overcomes the problem of installing different valves separately in the past, making assembly simple, reducing leakage points, and saving costs.

Description of drawings

Fig. 1 is a schematic structural view of the anti-vacuum pressure relief valve provided by Embodiment 1 of the present invention;

Fig. 2 is a schematic structural view of the anti-vacuum pressure relief valve provided by Embodiment 2 of the present invention.

Among them, 1. inner cavity; 2. valve body; 3. liquid inlet; 4. liquid outlet; 5. anti-vacuum valve core; 6. anti-vacuum spring; 7. first annular protrusion; 8. second annular Protrusion; 9. Anti-vacuum valve seat; 10. Gas flow hole; 11. First guide rod; 12. Seal rubber ring; 13. Pressure relief nut; 14. Pressure relief spring; 15. Pressure relief valve core; 16. The third annular protrusion; 17, the second guide rod; 18, the pin shaft; 19, the baffle plate; 20, the fourth annular protrusion.

detailed description

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

Example 1

As shown in Figure 1, this embodiment protects an anti-vacuum pressure relief valve, the anti-vacuum pressure relief valve includes a valve body 2 with an inner cavity 1, the valve body 2 includes a liquid inlet 3 and a liquid outlet 4, The side wall of the valve body 2 is provided with a gas circulation passage and a liquid circulation passage connected with the inner cavity 1. The gas circulation passage is provided with an anti-vacuum valve core 5 component for controlling its opening and closing, and the liquid circulation passage is provided with a control valve core 5 for controlling its opening and closing. Open and close pressure relief spool 15 assemblies.

The anti-vacuum pressure relief valve combines the anti-vacuum function and pressure relief function into one valve body 2, which overcomes the complicated installation procedures and many leak points caused by installing the anti-vacuum valve and pressure relief valve separately in the past. problem, and the number of valves is reduced, saving cost. At the same time, the anti-vacuum pressure relief valve can prevent the water tank of the water heater from being deflated due to excessive negative pressure, and can prevent the water tank from bursting due to excessive internal liquid pressure.

The specific structures of the anti-vacuum valve core assembly and the pressure relief valve core assembly in this embodiment will be described in detail below.

As shown in Figure 1, the anti-vacuum valve core assembly includes an anti-vacuum valve core 5 and an anti-vacuum spring 6, and the side walls at both ends of the gas flow channel are respectively provided with a first annular protrusion 7 and a second annular protrusion extending radially. 8, the first annular protrusion 7 is far away from the inner cavity 1, and when there is no gas flow in the gas circulation channel, the anti-vacuum valve core 5 abuts against the first annular protrusion 7, and one end of the anti-vacuum spring 6 abuts against the anti-vacuum valve core 5, and the other end abuts on the second annular protrusion 8. In this embodiment, the gas circulation channel is composed of a gas circulation hole 10 opened on the side wall of the valve body 2 and an anti-vacuum valve seat 9 installed on the side wall. A first annular protrusion 7 is provided on the top to cooperate with the valve core. The diameter of the above-mentioned gas passage hole 10 is smaller than the inner diameter of the valve seat, so the side wall of the valve body 2 around the gas passage hole 10 forms a second annular protrusion 8 .

The anti-vacuum valve core 5 is connected with a first guide rod 11, the first guide rod 11 passes through the first annular protrusion 7, and the movement of the anti-vacuum valve core 5 is guided by the first guide rod 11 to ensure that the anti-vacuum valve The stability of core 5 movement prevents failure.

A sealing rubber ring 12 is provided on the side of the anti-vacuum valve core 5 close to the first annular protrusion 7 to form a seal between the anti-vacuum valve core 5 and the first annular protrusion 7 to prevent leakage under normal conditions.

As shown in Figure 1, the pressure relief valve core assembly includes a pressure relief nut 13, a pressure relief spring 14 and a pressure relief valve core 15, and a third annular ring extending radially is provided on the side wall of the liquid circulation channel near the inner cavity 1. The protrusion 16 and the pressure relief nut 13 are threadedly connected to the end of the liquid circulation channel away from the inner cavity 1. When there is no liquid in the liquid circulation channel, the pressure relief valve core 15 leans against the third annular protrusion 16, and the pressure relief spring One end of 14 abuts on the pressure relief valve core 15 , and the other end abuts on the pressure relief nut 13 . Wherein, the distance between the pressure relief nut 13 and the third annular protrusion 16 can be adjusted, so that the pressure relief valve core assembly realizes pressure relief under different liquid pressures.

The pressure relief valve core 15 is connected with a second guide rod 17, the second guide rod 17 passes through the third annular protrusion 16, and the second guide rod 17 guides the pressure relief valve core 15 to ensure that the pressure relief valve core 15 moves stability in the process. A sealing rubber ring 12 is provided on the side of the pressure relief valve core 15 close to the third annular protrusion 16 , so that a seal is formed between the pressure relief valve core 15 and the third annular protrusion 16 to prevent leakage under normal conditions.

When there is a negative pressure in the water tank, due to the suction inside the valve body 2, the anti-vacuum valve core 5 is forced to compress the anti-vacuum spring 6, and the anti-vacuum spring 6 shortens, so that the gap between the anti-vacuum valve core 5 and the first annular protrusion 7 When there is a gap, the outside atmosphere enters the anti-vacuum pressure relief valve through the gas circulation channel, and then enters the water tank, so as to keep the pressure in the water tank from being too low and prevent the water tank from being deflated; when the pressure in the water tank is too high, Due to the effect of liquid pressure, the pressure relief valve core 15 receives pressure, compresses the pressure relief spring 14, and the pressure relief spring 14 shortens, a gap appears between the pressure relief valve core 15 and the third annular protrusion 16, and the liquid in the water tank is formed by the liquid. The flow channel is vented to the outside, which reduces the pressure inside the tank and prevents the tank from bursting.

Example 2

The difference between this embodiment and Embodiment 1 is that a check valve core assembly is also provided in the inner cavity 1 .

As shown in Figure 2, the check valve core assembly includes a pin shaft 18 and a baffle plate 19, the upper end of the baffle plate 19 is provided with a pin hole, and the upper end of the baffle plate 19 is fixed on the valve body 2 through the pin shaft 18, and the baffle plate 19 The lower end is a free end, and the side wall of the inner cavity 1 upstream of the baffle 19 is provided with a fourth annular protrusion 20 for limiting the rotation of the baffle 19 . When there is normal liquid flowing from the liquid inlet 3 to the liquid outlet 4 in the valve body 2, the lower end of the baffle 19 is lifted under the action of the flowing liquid, and the liquid flows out. When the liquid stops flowing outward, and there is When backflowing, the lower end of the baffle plate 19 falls due to the action of gravity, and due to the effect of the backflowing liquid, it leans against the fourth annular projection 20 to block the flow of the liquid in the inner chamber 1 and prevent the overpressure from backflowing to the water tank to burst the water tank. Preferably, a sealing rubber ring 12 is provided on the side of the baffle plate 19 close to the fourth annular protrusion 20 to ensure a tight fit between the baffle plate 19 and the fourth annular protrusion 20 .

This specific embodiment also protects a water heater, which includes a water tank and a pipeline connected to the water tank, and the anti-vacuum pressure relief valve in the above-mentioned embodiment 1 or embodiment 2 is installed on the pipeline.

The above describes the technical principles of the present invention in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present invention, and cannot be construed as limiting the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation modes of the present invention without creative work, and these modes will all fall within the protection scope of the present invention.

Claims (10)

1. a kind of anti-vacuum relief valve, it is characterised in that including the valve body (2) provided with inner chamber (1), institute Stating includes inlet (3) and liquid outlet (4) on valve body (2), be provided with the side wall of the valve body (2) The air ventilation passage and fluid flow paths connected with inner chamber (1), the air ventilation passage is interior to be provided with control The anti-vacuum core assembly of its opening and closing is made, the pressure releasing valve core for controlling its opening and closing is provided with the fluid flow paths Component.

2. anti-vacuum relief valve according to claim 1, it is characterised in that in the inner chamber (1) Provided with non-return valve core component.

3. anti-vacuum relief valve according to claim 1 or 2, it is characterised in that the anti-vacuum valve Core assembly includes anti-vacuum valve element (5) and anti-vacuum spring (6), the side wall at the air ventilation passage both ends On be respectively equipped with to first annular raised (7) that radially extend and the second annular protrusion (8), first ring Shape projection (7) is away from the inner chamber (1), when the air ventilation passage circulates without gas, the anti-vacuum Valve element (5) is resisted against on first annular raised (7), and described anti-vacuum spring (6) one end is connected to On the anti-vacuum valve element (5), the other end is connected on second annular protrusion (8).

4. anti-vacuum relief valve according to claim 3, it is characterised in that the anti-vacuum valve element (5) On be connected with the first guide rod (11), first guide rod (11) is through first annular raised (7).

5. anti-vacuum relief valve according to claim 3, it is characterised in that the anti-vacuum valve element (5) The upper side close to first annular raised (7) is provided with O-ring seal (12).

6. anti-vacuum relief valve according to claim 1 or 2, it is characterised in that the pressure releasing valve core Component includes pressure release nut (13), pressure release spring (14) and pressure releasing valve core (15), and the liquid flow is all Side wall of the road close to inner chamber (1) one end is provided with to the 3rd annular protrusion (16) radially extended, described to let out Pressure nut (13) is threaded in the one end of the fluid flow paths away from inner chamber (1), when the liquid When no liquid circulates in circulation passage, the pressure releasing valve core (15) is resisted against the 3rd annular protrusion (16) On, described pressure release spring (14) one end is connected on the pressure releasing valve core (15), and the other end is connected to institute State on pressure release nut (13).

7. anti-vacuum relief valve according to claim 6, it is characterised in that the pressure releasing valve core (15) On be connected with the second guide rod (17), second guide rod (17) passes through the 3rd annular protrusion (16), The pressure releasing valve core (15) is provided with O-ring seal (12) close to the side of the 3rd annular protrusion (16).

8. anti-vacuum relief valve according to claim 2, it is characterised in that the non-return valve core component Including bearing pin (18) and baffle plate (19), the upper end of the baffle plate (19) is provided with pin-and-hole, the baffle plate (19) Upper end be fixed on by the bearing pin (18) on valve body (2), the lower end of the baffle plate (19) is freely End, the side wall of the inner chamber (1) of baffle plate (19) upstream are provided with fourth annular projection (20), work as liquid When body stops outflow, the baffle plate (19) is resisted against in the fourth annular raised (20).

9. anti-vacuum relief valve according to claim 8, it is characterised in that on the baffle plate (19) O-ring seal (12) is provided with close to the side of the fourth annular raised (20).

10. a kind of water heater, including water tank and the pipeline that is connected with water tank, it is characterised in that the pipeline On anti-vacuum relief valve described in claim 1-9 any one is installed.