CN201138070Y - Non-return sealing structure of electric water heater safety valve - Google Patents

Abstract

The utility model provides a check sealing structure for a safety valve of an electric water heater, which belongs to the technical field of valves. The utility model solves the problems of complex structure and poor sealing effect existing in the check sealing structure of the safety valve of the electric water heater. The non-return sealing structure of the electric water heater safety valve is arranged between the water inlet and the water outlet in the valve body, including the main body cover, core, water inlet spring and sealing seat, the main body cover is fixed in the valve body, and the core The front end is movably plugged into the main body cover, and the rear end is connected with the sealing seat. One end of the water inlet spring acts on the main body cover, and the other end acts on the sealing seat. The sealing seat is made of rubber as a whole and can It forms a liquid seal with the inner end of the water inlet, and several positioning bosses for supporting the sealing seat in the valve body are arranged on the side of the sealing seat. The non-return sealing structure of the electric water heater safety valve has stable working performance, good sealing effect and simple structure.

Description

Non-return sealing structure of electric water heater safety valve

technical field

The utility model belongs to the technical field of valves, and relates to a safety valve of an electric water heater, in particular to a check sealing structure of a safety valve of an electric water heater.

Background technique

The safety valve is the main component of the electric water heater. Its main function is to protect the inner tank of the electric water heater and to provide reverse sealing when the tap water is cut off. Its main purpose is to automatically release the pressure when the tap water pressure is higher than the rated pressure of the safety valve, so as to protect the electric water heater. When the tap water is cut off, the hot water flows back, and when the high pressure of the inner tank is reversely released, the gasket is easily washed out of the core, resulting in the failure of the non-return sealing structure; or the backflow result that can solve the above shortcomings has the characteristics of complex results or difficult processing and production. , leading to an increase in cost.

A kind of safety valve on the electric water heater is arranged on the market, and this safety valve comprises valve body, core, cover, gasket, non-return spring, base to form non-return structure. When in use, when the water pressure in the pipeline changes suddenly, the following disadvantages are prone to occur: one is that the sealing composed of the sealing gasket and the base is prone to liquid leakage; the other is that the sealing gasket is easy to be damaged. The water flow rushes out of the core, so that the backflow device cannot function normally, thereby causing damage to the water heater; at the same time, this structural device is complicated to manufacture, has poor sealing effect and high manufacturing cost.

Contents of the invention

The purpose of this utility model is to provide a electric water heater with reliable working performance, low cost, simple and compact structure, and good sealing effect against the shortcomings of the existing electric water heater safety valve check sealing structure, such as complex structure and poor sealing effect. The non-return sealing structure of the water heater safety valve.

The purpose of this utility model can be achieved through the following technical proposals: a check sealing structure for the safety valve of an electric water heater, which is arranged between the water inlet and the water outlet in the valve body, including a main body cover, a core, a water inlet spring and Sealing seat, the main body cover is fixed in the valve body, the front end of the core is movably inserted in the main body cover, the rear end is connected with the sealing seat, one end of the water inlet spring acts on the main body cover, and the other end acts on the sealing seat Above, it is characterized in that the sealing seat is made of rubber as a whole and can form a liquid seal with the inner end of the water inlet, and several positioning bosses are provided on the side of the sealing seat for supporting the sealing seat in the valve body .

When water enters, due to the effect of water inlet pressure, the sealing seat compresses the water inlet spring, and the non-return sealing structure conducts; The inner end of the nozzle forms a liquid seal. The above-mentioned core acts as a guide for the sealing seat; the positioning boss provided on the sealing seat can support the sealing seat without making it tilt or swing left and right in the valve body, so as to ensure the normal operation of the guide; A water passage is formed between the two positioning bosses, so that water can flow through the sealing seat smoothly. The entire sealing seat is made of rubber, so the sealing seat not only has the function of sealing, but also plays the role of positioning. The two functions are integrated together to make the structure simple and easy to manufacture, thereby reducing costs and improving tightness.

In the above-mentioned non-return sealing structure of the electric water heater safety valve, a through hole is opened in the center of the sealing seat, the above-mentioned core is movably connected with the through hole of the sealing seat, and the end of the core is provided with a non-return spring under the action of a non-return spring. A liquid-tight lip can be formed with the outer side of the sealing seat. One end of the non-return spring acts on the sealing seat, and the other end acts on the middle of the core.

The above-mentioned core passes through the sealing seat, and the convex edge at the end of the core is pressed against the sealing seat by the non-return spring, so that the core is connected to the sealing seat. When the pressure of the water outlet is too high, the above-mentioned convex edge compresses the non-return spring under the action of water pressure, so that the convex edge is separated from the sealing seat, so that the water in the water outlet flows from the through hole of the sealing seat to the water inlet, reducing the The pressure of the water outlet protects the inner tank of the water heater.

In the above-mentioned non-return sealing structure of the safety valve of the electric water heater, the through hole is fixedly connected with the socket with the water hole, and the socket is made of industrial plastics, and the above-mentioned core and the socket pass through the water. Hole active connection. The seat can increase the hardness of the through hole of the sealing seat, and at the same time, the seat can also play an important protective role when the core is easily washed out of the sealing seat by water. The flexible connection between the core and the water hole of the seat not only enables the core to move relative to the seat, but also the backwater can pass through the water hole of the seat. On the other hand, it can prevent the sealing seat from being deformed, so that the core is easily displaced from the sealing seat and the sealing performance is reduced.

As another connection between the core and the sealing seat, in the above-mentioned non-return sealing structure of the electric water heater safety valve, the sealing seat is disc-shaped, and the rear end of the core is fixedly connected to the sealing seat. Resulting in a compact structure and reduced costs. The way of fixed connection here is generally to adopt the way of tight fit.

In the above-mentioned non-return sealing structure of the safety valve of the electric water heater, the number of the positioning bosses is 3-10. There are certain requirements for the number of positioning bosses, too little will not be effective in supporting the sealing seat, and too many will affect the gap between the bosses. Repeated experiments have proved that the number of positioning bosses is 6 and the effect is the best.

In the above-mentioned non-return sealing structure of the safety valve of the electric water heater, a shoulder is provided in the middle of the core, and the end of the non-return spring is fixed on the shoulder. During assembly, the non-return spring is fixed under the shoulder of the core by a spring compression device.

In the above-mentioned non-return sealing structure of the safety valve of the electric water heater, the said nest is fixedly connected with the sealing seat by means of tight fit. The nesting seat is made of industrial plastic, and the sealing seat is made of rubber. It is the best way to connect the two with a tight fit.

Compared with the prior art, the non-return sealing structure of the electric water heater safety valve has the following advantages:

1. The positioning boss set on the sealing seat can support the sealing seat in the valve body without tilting it, so as to ensure the normal operation of the guide; the working performance is reliable and stable.

2. The insert is set in the sealing seat, which increases the hardness of the core when pushing the sealing seat, prevents the sealing seat from being deformed and cannot form a liquid seal, and effectively improves the working performance.

3. In use, because the seat and the sealing seat are designed as a whole, there is no sealing part washed out by water pressure.

Description of drawings

Fig. 1 is a structural schematic diagram of the non-return sealing structure of the electric water heater safety valve in Embodiment 1.

Fig. 2 is a structural schematic diagram of the sealing seat in the non-return sealing structure of the safety valve of the electric water heater in embodiment 1.

Fig. 3 is a structural schematic diagram of the sealing seat in the non-return sealing structure of the safety valve of the electric water heater in embodiment 2.

In the figure, 1. Valve body; 2. Main body cover; 3. Core; 31. Convex edge; 32. Shoulder; 4. Water inlet spring; 5. Seal seat; 51. Positioning boss; 52. Through hole ; 6, embedded seat; 61, water hole; 7, check spring; 8, water inlet; 9, water outlet.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

Example 1:

As shown in Figure 1 and Figure 2, the non-return sealing structure of the safety valve of the electric water heater is arranged between the water inlet 8 and the water outlet 9 in the valve body 1, including the main body cover 2, the core 3, the water inlet spring 4 and seal seat 5 and nest 6, check spring 7, limit base 8, etc.

The main body cover 2 is screwed in the valve body 1, the front end of the core 3 is movably inserted on the main body cover 2, the rear end is connected with the sealing seat 5, and one end of the water inlet spring 4 acts on the main body cover 2, The other end acts on the sealing seat 5, the sealing seat 5 is made of rubber as a whole and can form a liquid seal with the inner end of the water inlet 8. The side of the sealing seat 5 is provided with 6 positioning bosses 51 for supporting the sealing seat 5 in the valve body 1, and the positioning bosses 51 provided on the sealing seat 5 can support the sealing seat 5 and will not Make it inclined to ensure axial movement in the valve body. A water passage is formed between two adjacent positioning bosses 51 , so that water can flow through the sealing seat 5 smoothly. A through hole 52 is opened in the center of the sealing seat 5, and the insert seat 6 having a water hole 61 is fixedly connected in the through hole 52, and the insert seat 6 is fixedly connected with the seal seat 5 through a tight fit. The nesting seat 6 and the sealing seat 5 are designed as a whole, so there is no problem that the sealing member is washed out by the backflow water. The entire sealing seat 5 is made of rubber, so the sealing seat 5 not only has the function of sealing, but also has the effect of positioning. The combination of the two functions makes the structure simple and the production becomes convenient, thereby reducing the cost .

In order to increase the hardness at the through hole 52 of the sealing seat 5, the seat 6 is made of industrial plastics, and the core 3 is flexibly connected with the water hole 61 of the seat 6. Specifically, the diameter of the water hole 61 is smaller than the diameter of the convex edge 31 of the core 3, and the return water can pass through the water hole 61 of the seat 6; in order to seal, a convex edge 31 is provided at the end of the core 3 , under the action of the non-return spring 7, it can form a liquid seal with the outside of the sealing seat 5. A shoulder 32 is provided in the middle of the core 3 , one end of the non-return spring 7 acts on the shoulder 32 , and the other end of the non-return spring 7 acts on the sealing seat 5 .

When assembling, insert the nest 6 into the sealing seat 5 first, insert the non-return spring 7 after the front end of the core 3 passes through the water hole 61 of the nest 6, and the non-return spring 7 is fixed on the protrusion by the spring compression device. shoulder 32 without damaging the elasticity of the spring. In order to facilitate the assembly of the non-return spring 7, a tapered surface is made on the front side of the shoulder 32, and the non-return spring 7 adopts a conical spring, the small end of which is abutted on the shoulder 32, and the large end is abutted on the nest 6. Afterwards, put the above-installed parts into the valve body 1, put the water inlet spring 4 on the core 3, and screw the main body cover 2 into the valve body 1 and the front end of the core 3 through a threaded connection. .

When water enters, the pressure of the water inlet 8 is greater than the pressure of the water outlet 9, so that the sealing seat 5 compresses the water inlet spring 4, and the non-return sealing structure conducts; The seat 5 is pushed back to its original position to form a liquid seal with the inner end of the water inlet 8 . When the pressure of the water outlet 9 is too high, the above-mentioned convex edge 32 compresses the non-return spring 7 under the action of water pressure, so that the convex edge 32 is separated from the sealing seat 5, so that the water in the water outlet 9 passes through the sealing seat 5 The medium flows to the water inlet 8, which reduces the pressure of the water outlet 9 and protects the inner tank of the water heater.

Example 2:

As shown in Figure 3, the structure of the second embodiment is basically the same as that of the first embodiment, the difference is that the sealing seat 5 in this example is disc-shaped, and the core 3 is directly fixedly connected to the sealing seat 5 by means of a tight fit. The rest will not be described in detail.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although this article uses more valve body 1, main body cover 2, core 3, convex edge 31, shoulder 32, water inlet spring 4, sealing seat 5, positioning boss 51, through hole 52, insert seat 6, Water hole 61, check spring 7, water inlet 8, water outlet 9 and other terms, but do not exclude the possibility of using other terms. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (7)

1, a kind of non-return sealing structure of electric water heater safety valve, be arranged between the water inlet (8) and delivery port (9) in the valve body (1), comprise main body capping (2), fuse (3), water inlet spring (4) and seal receptacle (5), main body capping (2) is fixed in the valve body (1), the front end activity of fuse (3) is plugged in the main body capping (2), rear end and seal receptacle (5) link, one end of water inlet spring (4) acts in the main body capping (2), the other end acts on the seal receptacle (5), it is characterized in that, described seal receptacle (5) whole by rubber make and can with the inner liquid sealing that form of water inlet (8), be provided with several at the sidepiece of seal receptacle (5) and be used for seal receptacle (5) is supported on positioning boss (51) in the valve body (1).

2, the non-return sealing structure of electric water heater safety valve according to claim 1, it is characterized in that, described seal receptacle (5) center has through hole (52), above-mentioned fuse (3) flexibly connects with seal receptacle (5) through hole (52), end at fuse (3) is provided with the convex edge (31) that can form liquid sealing under check spring (7) effect with seal receptacle (5) outside, one end of described check spring (7) acts on the seal receptacle (5), and the other end acts on fuse (3) middle part.

3, the non-return sealing structure of electric water heater safety valve according to claim 2, it is characterized in that, the embedding seat (6) that is being connected in the described through hole (52) and is having water hole (61), this embedding seat (6) is made by industrial plastic, and above-mentioned fuse (3) flexibly connects with embedding seat (6) water hole (61).

4, the non-return sealing structure of electric water heater safety valve according to claim 1 is characterized in that, described seal receptacle (5) is plate-like, fixedlys connected with seal receptacle (5) in the rear end of fuse (3).

5, the non-return sealing structure of electric water heater safety valve according to claim 1 is characterized in that, described positioning boss (51) quantity is 3～10.

6, the non-return sealing structure of electric water heater safety valve according to claim 2 is characterized in that, described fuse (3) middle part is provided with convex shoulder (32), and the end of described check spring (7) is fixed on the convex shoulder (32).

According to the non-return sealing structure of claim 1 or 3 described electric water heater safety valves, it is characterized in that 7, described embedding seat (6) is connected by friction tight mode and seal receptacle (5).

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