CN2347007Y - Security valve of electrothermal water heater - Google Patents

Abstract

The utility model relates to a security valve for an electric water heater. The utility model is characterized in that a valve seat of a pressure relief valve and a valve rod are separate types; the valve rod is movably arranged in a travel cavity of the valve seat; the interior of the end surface of a valve body is provided with a semicircular sealing ring. As the valve seat and the valve rod are respectively a single part, the valve rod does not move following the valve seat when the valve seat is in the moving process of opening and closing; accordingly, the running time of the valve rod is decreased; the phenomenon of water leakage of the valve rod and the end surface is avoided under the action of the sealing ring.

Description

Electric water heater safety valve

The utility model is an electric water heater safety valve, is the improvement to existing safety valve structure.

The safety valve of electric water heater is the indispensable vitals of electric water heater.It mainly contains 2 effects, and 1, in heating process, when the inner bag internal pressure surpassed the safety pressure of regulation, safety valve was opened pressure release, produces explosion to prevent inner bag because of overpressure, the injury personal safety; 2, another effect is: can get rid of the bottom sewage in the water heater.But it is one that existing safety valve exists some defective: a, emergency valve seat and valve rod, seal arrangement is not established in annular space between valve rod and valve body and handle valve body end, safety valve is when pressure release and blowdown, because of valve rod with the emergency valve seat interlock, part water will outwards spill from valve rod and valve body end, water leakage phenomenon is just more serious when especially being with pressure dirty, because above-mentioned defective, safety valve can not be installed down, has limited installation form, and customer responsiveness is strong.B, inlet valve are to be made of rubber pad, cylinder, these several separate parts of mandrel, and it is crooked that the glue valve is taken place, and causes and leak.

The purpose of this utility model is in order to solve the problem of above-mentioned existence, a kind of electric water heater safety valve to be provided.It can realize following purpose: 1, overcome the phenomenon of handle valve rod place and valve body end face water clock water, and band pressure dirt may be scalded people's hidden danger; 2, overcome inlet valve place water leakage phenomenon.

In order to achieve the above object, the utility model comprises valve body, water-inlet cavity is arranged in the valve body, pressure-releasing chamber, in water-inlet cavity, be provided with inlet valve and tower spring, in pressure-releasing chamber, be provided with Decompression valves, Decompression valves is sealed in the passage place of water-inlet cavity and pressure-releasing chamber, valve rod end at Decompression valves is equipped with handle, it is characterized in that a, Decompression valves is by the glue valve, valve seat, valve rod, spring constitutes, and the glue valve is in the cavity of the front that is contained in valve seat, and valve seat and valve rod are separate form, one valve seat stroke chamber is arranged in valve seat inside, the lower end of valve rod is contained in the valve seat stroke chamber versatilely, and the end face of valve rod is protruding a round platform, when valve rod is in top dead center position, the glue valve back side to the distance of valve rod end face is valve seat stroke h, and spring one end that is enclosed within on valve seat and the valve rod withstands on the valve seat; The other end withstands on to be adjusted on the cap, adjusts cap by being threaded on the pressure-releasing chamber inwall; B, in the inner chamber of adjusting cap and valve body end face a seal ring is housed, the sealing snare is on the body of rod of valve rod, and the circular periphery of seal ring is by pad, and spring sheet compresses.

The shape of described seal ring is the semicircle that raises up.

Inlet valve is an overall structure.

The utlity model has following advantage and good effect: 1, in valve body, add to the semicircle seal ring, the seal ring banding valve rod, its circular periphery also seals the end, anti-so effectively sealing is from the outside water clock of valve rod and valve body end, both be the phenomenon generation that band pressure dirt does not have percolating water yet, provided users with the convenient.2, valve seat and valve rod change the branch body structure into by original integrative-structure, when pressure release, valve seat independent switch in the stroke range of oneself moves, and the not following interlock of valve rod, improved the stability of sealing in the pressure leak process like this, only valve seat just promotes with valve rod when blowdown, has significantly reduced the number of run of valve rod, has improved the reliability and the working life of safety valve.3, the valve disc of inlet valve, cylinder and mandrel change overall structure into by independent minute original body structure, and valve disc is difficult for deflection like this, can avoid leaking.4, because safety valve has solved the water clock water phenomenon of valve rod place and end, thereby the mounting point is unrestricted, can be used for any direction and installs and uses.

Fig. 1 is a sectional view of the present utility model;

Fig. 2 is valve seat of the present utility model, valve rod, spring place sectional view.

1, valve body; 2, water tray; 3, tower spring; 4, inlet valve; 5, filter screen; 6, seal ring; 7, water outlet; 8, outlet pipe; 9, seal ring; 10, pad; 11, spring sheet; 12, rivet; 13, handle; 14, adjust cap; 15, valve rod; 16, spring; 17, valve seat; 18, glue valve; 19, water-inlet cavity; 20, pressure-releasing chamber; 21, Decompression valves; 22, valve seat stroke chamber; H, valve seat stroke.

Referring to Fig. 1, Fig. 2, Decompression valves 2 is made of glue valve 18, valve seat 17, spring 16 and valve rod 15.For fear of in pressure leak process, valve seat 17 is made two independent parts with valve rod 15 interlocks with valve seat 17 and valve rod 15.Glue valve 18 is fitted in the inner chamber of valve seat 17 fronts, to play the usefulness of sealing.One valve seat stroke chamber 22 is arranged in the valve seat 17, and the lower end of valve rod 15 is contained in the valve seat stroke chamber 22 versatilely.When valve rod 15 was in top dead center position, glue valve 18 back sides to valve rod 15 end face distances were valve seat stroke h (the h stroke range are at 0.2-5mm).Pressure-releasing chamber 20 inwalls are provided with internal thread, adjust cap 14 peripheries and have outside thread, by above-mentioned screw-thread fit, adjust cap 14 and are contained on the inwall of pressure-releasing chamber 20.Between adjustment cap 14 and valve seat 17, spring 16 is housed.Spring force can be by adjusting cap 14 degree of tightness adjustment.When the water heater liner internal pressure is too high, then back down valve seat 17, water is let out away from outlet pipe 8.Because valve seat 17 and valve rod 15 are separate form, when valve seat 17 opened and closed back and forth, the not corresponding accompany movement of valve rod 15 had realized the stability that seals.In order to prevent at pressure leak process water from the outside water clock of valve rod 15 and end, the one semicircle seal ring 9 that raises up is installed in the inner chamber of adjusting between cap 14 and valve body 1 end face, the lip limit banding of seal ring 9 intermediate holes is on the body of rod of valve rod 15, the circular periphery of seal ring 9 is seated on the circular periphery in the valve body 1, and pad 10, spring sheet 11 compress it.Guaranteed that like this water can outwards not flow out along valve rod 15 and valve body 1 end.For fear of inlet valve 4 seepages, prevent that it is crooked, inlet valve 4 is made an integral molded plastic spare.

Claims (3)

1, a kind of electric water heater safety valve, it comprises valve body (1), water-inlet cavity (19) is arranged in the valve body (1), pressure-releasing chamber (20), in water-inlet cavity (19), be provided with inlet valve (4) and tower spring (3), in pressure-releasing chamber (20), be provided with Decompression valves (21), Decompression valves (21) is sealed in the passage place of water-inlet cavity (19) and pressure-releasing chamber (20), in the valve rod end of Decompression valves (21) handle (13) is installed, it is characterized in that a, Decompression valves (21) is by glue valve (18), valve seat (17), valve rod (15), spring (16) constitutes, glue valve (18) is in the cavity of the front that is contained in valve seat (17), valve seat (17) is a separate form with valve rod (15), in valve seat (17) inside one valve seat stroke chamber (22) is arranged, the lower end of valve rod (15) is contained in the valve seat stroke chamber (22) versatilely, the end face of valve rod (15) has a dome platform, when valve rod (15) when being in top dead center position, glue valve (18) back side to the distance of valve rod (15) end face is valve seat stroke h, and spring (16) one ends that are enclosed within on valve seat (17) and the valve rod (15) withstand on valve seat (17); The other end withstands on to be adjusted on the cap (14), adjusts cap (14) by being threaded on pressure-releasing chamber (20) inwall; B, a seal ring (9) is housed adjusting in the inner chamber of cap (14) and valve body (1) end face, sealing circle (9) is enclosed within on the body of rod of valve rod (15), and the circular periphery of seal ring (9) is compressed by pad (10), spring sheet (11).

2, electric water heater safety valve according to claim 1, the shape that it is characterized in that described seal ring (9) is the semicircle that raises up.

3, electric water heater safety valve according to claim 1 and 2 is characterized in that inlet valve (4) is an overall structure.