CN201348068Y

CN201348068Y - Retaining valve

Info

Publication number: CN201348068Y
Application number: CNU2009201130153U
Authority: CN
Inventors: 沈琦炜
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-17
Filing date: 2009-01-17
Publication date: 2009-11-18
Anticipated expiration: 2019-01-17

Abstract

The utility model relates to a valve, in particular to a retaining valve, which comprises a valve housing, a valve core head, a valve core, an elastic component and a localizer. A valve pocket opening is formed inside the valve housing; the valve core head is an elastic valve core head capable of being in contact seal with the valve pocket opening under the action of the elastic component; and the valve core head is integrally connected with the valve core. The utility model adopts a method that the valve core head is integrally connected with the valve core, and is in contact seal with the valve pocket opening under the action of the elastic component, thereby greatly simplifying the internal structure of the whole component, reducing the number of parts. Therefore, the utility model has the advantages of simpler and convenient production and assembly, stability and high controllability.

Description

Safety check

Technical field

The utility model relates to a kind of valve, relates in particular to a kind of safety check.

Background technique

At present, domestic air-conditioning manufacturing enterprise, in the air-conditioning assembly process and before the product export, how will to vaporizer through strict gas leakage, refrigeration performance detect, test.The dispatch from the factory method of pressurize of conventional leak detection technology and air-conditioning internal machine roughly has two kinds:

First kind: be a end, with silently nut obstruction with the vaporizer copper pipe.The other end is inserted in nut earlier with a copper pipe on copper pipe, with flaring machine the copper pipe mouth is made horn mouth again, nut is threaded to the suction port of vaporizer again.By copper pipe, in vaporizer, pour helium leak check then, after detection finishes.Extract helium again out, pour nitrogen, with seal pliers with copper pipe press from both sides flat, clamp after, with the oxygen-acetylene burning torch copper pipe is cut off, and requires the scarfing place smooth air tight.Its shortcoming is:

1, wasted a large amount of copper materials.Every air-conditioning needs copper material 32 grams (comprising copper nut, copper pipe) approximately, as an enterprise that produces 3000000 per year, can save 96 tons copper material in 1 year so.

2, complex process, strongly professional to the operator.On each post of enlarging and welding, as do not have the workman of certain technology and operating experience, be difficult to competent.Show that mainly gas leakage is many, anti-revisionist serious, and anti-revisionistly repeatedly may cause product rejection.

3, the manufacturing shop air regime is undesirable.When the welding copper pipe, can when oxygen and acetylene combustion, produce certain flue gas and peculiar smell, though the environmental protection of each enterprise, dedusting are done finely now, can't guarantee to get rid of flue gas and peculiar smell completely.

Second kind: provide a kind of fluorine-infusing technique interface component in the existing Chinese patent of the patent No. for CN200710056639.1, it comprises: shell, rubber ring, clamping sleeve, rubber stopper, spool, spring, four leaf valve core housings; The outward appearance of shell constituent components, the underpart in the shell terminal pipe arrangement of indoor set that is threaded contacts with seal with elastometic washer, and the interior leading portion portion of shell is provided with four leaf valve core housings, spool and spring; The underpart of spool is frustoconic shape and rubber stopper contact seal under the effect of spring.It has substituted existing casting in bronze parts and has saved cost and resource, has saved welding process, makes operation more flexibly, conveniently.But its shortcoming is:

1,, after the use with regard to many enterprises' small lots such as AUX, Chunlan, Gree, batch, just has the gas leak phenomenon of significant proportion (on average 0.412%) from use condition.Also have some when using installation, find that the seal ring of product the inside has been fallen the package bag bottom.Certainly, this part is not also among above-mentioned data.

2, from product structure, the plastic valve internal structure is too in complexity, and needs be assembled with a plurality of accessories, makes like this that whole process of production becomes complicated, controllability is low, and human factor has determined the stability that the product assembling is used greatly.

3, from the aspect analysis of drawing materials, its spool is to be made of plastics, and to the bad adaptability of accuracy and weather, often product is in when assembling, and the slight tense-lax phenomenon that differs is arranged during each accessory socket.And when the test of process low temperature (18 ℃), because of inner each elements constrict ratio difference, and trickle stuck phenomenon appears.

The model utility content

A purpose of the present utility model provides a kind of production and easy to assembly, reliable, and tightness is good, and stability is high, the safety check that the wasting of resources is few.

Above-mentioned technical purpose of the present utility model is achieved by the following technical programs:

Safety check, it comprises valve shell, valve core head, spool, elastic member, positioning work piece; Described valve shell has a valve pocket mouth in inside, described valve core head is can be under the effect of elastic member and the feather valve core print of valve pocket mouth contact seal.

As preferably, valve core head is connected with the spool one.

As preferably, the contact position of valve pocket mouth and valve core head is complementary smooth curved surface.Can increase the surface of contact of valve pocket mouth and valve core head like this, improve the tightness of safety check integral body, reduce the frictional loss that valve core head is little because of area of contact, sealing produces built on the sand.

As preferably, safety check also comprises a seal ring, and one or more positive stop lug boss are also contained in the inside of described valve shell, seal ring and positive stop lug boss close-fitting.The height of described seal ring is identical with positive stop lug boss or lower slightly.Can make the better tightness of seal ring like this, and area of contact increases between each connected components, makes its difficult drop-off.

As preferably, the latter half part of the underpart in the valve shell has internal thread, and described internal thread extends to the seal ring place.

As preferably, spool is that casting in bronze or other metallic material are made, and having reduced environment influences spool, has guaranteed the stability of safety check in using for a long time and preserving.

As preferably, also has a protruding small stair on the valve pocket mouth.Can reduce the internal orifice dimension of valve shell like this, the seal of safety check is improved, and make spool be difficult for producing relative displacement because of vibrations.

In sum, the utlity model has following beneficial effect:

1, the utility model adopt valve core head to be connected with the spool one and valve core head under the effect of elastic member with the method for valve pocket mouth contact seal, significantly simplified the internal structure of whole parts, reduced the quantity of part, make the utility model produce, fit on is more simple, convenient, stable, controllability is high;

2, the contact position of valve pocket mouth and valve core head is complementary smooth curved surface in the utility model.Can increase the surface of contact of valve pocket mouth and valve core head like this, improve the tightness of safety check integral body, reduce the frictional loss that valve core head is little because of area of contact, sealing produces built on the sand;

3, seal ring in the utility model and positive stop lug boss close-fitting, the height of described seal ring is identical with positive stop lug boss or lower slightly.Can make the better tightness of seal ring like this, and area of contact increases between each connected components, makes its difficult drop-off in processes such as transportation, assembling;

4, also has a protruding small stair on the valve pocket mouth of the valve shell in the utility model.Can reduce the internal orifice dimension of valve shell like this, the seal of safety check is further enhanced, and make spool be difficult for producing relative displacement because of vibrations;

5, the utility model spool is that casting in bronze or other metallic material are made, and has saved cost and metals resources, and having reduced environment influences spool, has guaranteed the stability of safety check in using for a long time and preserving.

Description of drawings

Fig. 1 is the structural representation of safety check;

Fig. 2 is the structural representation of the safety check after the another kind of distortion.

Embodiment

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

This specific embodiment only is to explanation of the present utility model; it is not to restriction of the present utility model; those skilled in the art can make the modification that does not have creative contribution to present embodiment as required after reading this specification, but as long as all are subjected to the protection of Patent Law in claim of the present utility model.

Safety check as shown in Figure 1, it comprises: valve shell 1, seal ring 2, valve core head 3, spool 4, elastic member 5, positioning work piece 6; Described valve shell 1 contains 1 positive

stop lug boss

7 and 1 valve pocket mouth 8 in inside.Valve shell 1 wherein is that the best polyoxymethylene (POM) of high and low temperature resistance carries out injection moulding for raw material in the plastics, and wherein valve pocket mouth 8 left sides are the pipe arrangement junction chamber, and the right side is the gas injection chamber.Seal ring 2 and valve core head 3 all use high-low temperature resistant, chemical-resistant resistance, fluoride tolerance, tightness good, hardness is between Shao 65-70 A, intensity 〉=12Mpa, compressive strain (70 ℃ * 72h) :≤8% hydrogenated nitrile-butadiene rubber is made, spool 4 is casting in bronze, elastic member 5 is a high-strength spring, and positioning work piece 6 is cross location copper nut.

Valve core head 3 is directly annotated to press and is formed on the spool 4.

Valve core head 3 under the effect of elastic member 5 with 8 contact seals of valve pocket mouth.Valve pocket mouth 8 is complementary smooth curved surface with the contact position of valve core head 3, is Tai Ji shape.

Seal ring 2 is connected with positive stop lug boss 7 close-fittings, and the height of seal ring 2 is identical with positive stop lug boss 7.

There is internal thread the underpart of the pipe arrangement junction chamber in the valve shell 1, and described internal thread extends to seal ring 2 places.

Also has a protruding small stair 9 on the valve pocket mouth 8.

This safety check is connected by described internal thread in the valve shell 1 with the indoor apparatus of air conditioner pipe arrangement, and the indoor apparatus of air conditioner pipe arrangement contacts with seal ring 2 close-fittings.

The working principle of safety check is as follows: the end of indoor apparatus of air conditioner pipe arrangement screw in valve shell 1 rearward end promptly with seal ring 2 contact seals; When the air conditioner gas injection, the gas injection muzzle is pressed into positioning work piece 6, positioning work piece 6 drives spool 4 and moves in the gas injection chamber by elastic member 5, making valve core head 3 break away from valve pocket mouth 8 moves in the pipe arrangement junction chamber of valve shell 1, removed the sealing of valve core head 3 with valve pocket mouth 8, inject gas by gas injection lance this moment.After finishing the implantation step of gas, along with withdrawing from of gas injection lance, spool 4 travelling backwards under the effect of elastic member 5 makes valve core head 3 and valve pocket mouth 8 contact seal again, prevents the loss of gas.The end of spool 4 and positioning work piece 6 do not expose to the end of valve shell 1.In the process that air conditioner is installed, the safety check of only need dismantling can connect the pipe arrangement of indoor unit and outdoor unit, install.

Another kind of safety check as shown in Figure 2, itself and difference as shown in Figure 1 are:

1, increased the long frustoconic shape seeker 10 of a gas injection lance on the positioning work piece 6;

2, valve pocket mouth 8 has been cancelled small stair;

3, valve core head 3 is conical;

4, increase by one second positive stop lug boss 11 in the pipe arrangement junction chamber, and make 2 stepped arranging of positive stop lug boss in the pipe arrangement junction chamber;

5, the overstriking thickened sealing ring 2, and before being placed on first positive stop lug boss 7, increase a back-up ring 12 that is higher than seal ring 2 after seal ring 2, and back-up ring 12 is on first positive stop lug boss before 7, second positive stop lug boss 11.

Claims

1, safety check, it comprises valve shell, valve core head, spool, elastic member, positioning work piece; Described valve shell has a valve pocket mouth in inside, it is characterized in that: described valve core head is for can be under the effect of elastic member and the feather valve core print of valve pocket mouth contact seal.

2, safety check according to claim 1 is characterized in that: described valve core head is connected with the spool one.

3, safety check according to claim 1 is characterized in that: the contact position of described valve pocket mouth and valve core head is complementary smooth curved surface.

4, safety check according to claim 1, it also comprises a seal ring, it is characterized in that: one or more positive stop lug boss are also contained in the inside of described valve shell, and described seal ring is connected with the positive stop lug boss close-fitting.

5, safety check according to claim 4 is characterized in that: the height of described seal ring is identical with positive stop lug boss or lower slightly.

6, safety check according to claim 1 is characterized in that: the latter half part of underpart has internal thread in the described valve shell, and described internal thread extends to the seal ring place.

7, safety check according to claim 1 is characterized in that: described spool is that casting in bronze or other metallic material are made.

8, safety check according to claim 1 is characterized in that: also have a protruding small stair on the described valve pocket mouth.