CN201339718Y

CN201339718Y - Valve

Info

Publication number: CN201339718Y
Application number: CNU2009200954705U
Authority: CN
Inventors: 魏东方; 王文财
Original assignee: Danfoss Tianjin Ltd
Current assignee: Danfoss Tianjin Ltd
Priority date: 2009-01-24
Filing date: 2009-01-24
Publication date: 2009-11-04
Anticipated expiration: 2019-01-24

Abstract

The utility model discloses a valve(10) which comprises a valve body(2) with a confined interior room(22), a valve core(6) and a valve seat(8) arranged in the interior room(22) of the valve body(2), and an elastic part(16) with one end connected on either the valve core(6)or the valve seat(8). The elastic part(16) exerts elastic force on either the valve core(6) or the valve seat(8) to adjust the gap therebetween. The valve further comprises a sealing part(20) with one end combined with the elastic part(16) and the other end welded and sealed with the inner wall of the valve body(2). The valve(10) is simple in structure, high in operation efficiency and safe in sealing, saves material, simplifies the making process and reduces the making cost.

Description

Valve

Technical field

The utility model relates to a kind of valve, more specifically to a kind of expansion valve, for example is used for the heating power expansion valve that freeze cycle such as air-conditioning, refrigerating plant are used to control the cold medium flux of sending into vaporizer.

Background technique

Expansion valve is the device that is usually used in being used to control in the freeze cycle such as air-conditioning, refrigerating plant the cold medium flux of sending into vaporizer, and its effect is in refrigeration system, with refrigeration agent throttling step-down, so that gasification heat absorption in vaporizer; Regulate liquid supply rate, meet the needs of heat load; Guarantee that refrigeration agent has certain degree of superheat, in order to avoid the utilization ratio of " liquid hammer " and assurance vaporizer.

With reference to figure 1, it shows a kind of expansion valve 100 of the prior art, and this expansion valve 100 has valve body 110, and this valve body 110 is respectively arranged with inlet 105 and outlet 106 in both sides.In addition, in this valve body 110, also be provided with valve seat 107 and spool 108, below spool 108, be provided with spring 109, this spring 109 applies elastic acting force between described valve seat 107 or the spool 108, regulating the opening between them, thus the flow of realizing regulating inlet 105 and exporting the refrigeration agent between 106.

In order to realize that expansion valve 100 works under the pressure-bearing condition, need be with the bottom sealing of valve body 110.Existing sealing configuration is a screw thread and the combining of metallic seal.Just, at first valve plug connecting head 101 is connected by the tunnel weldering with valve body 110, O type circle is installed on valve plug connecting head 101 then, use machining apparatus to tighten valve plug at last, thereby reach the effect of sealing according to torque demand.

Yet, this sealing configuration in actual applications, screw thread is loosening easily, has caused the seal failure to valve body 110, and then has caused operation dangerous.In addition, the cost of raw material of this sealing configuration is higher, the pretightening force of double thread requires tight and need complicated tunnel weldering to connect and process steps such as assembling O type circle, therefore, need this sealing configuration of above-mentioned expansion valve be improved.

The model utility content

Given this, the purpose of this utility model is to overcome at least or partly alleviate above-mentioned problems of the prior art and defective.

Correspondingly, the purpose of this utility model is to provide a kind of valve with the sealing configuration that has improved, and this valve arrangement is simple, saved raw material, simplified making step, reduced fabricating cost.

Another purpose of the present utility model is to provide a kind of valve of the sealing configuration that has improved, and it has that operation is efficient, the advantage of sealingly secure.

In order to realize above-mentioned the purpose of this utility model, the utility model provides a kind of valve, and this valve comprises: valve body, and it is limited with the inner space; Be arranged at spool and valve seat in the inner space of described valve body; At one end be connected to the elastic member in described spool and the valve seat, described elastic member applies elastic acting force in described spool and the valve seat to regulate the opening between described spool and the valve body, wherein, this valve also comprises: sealed member, one end of described sealed member combines with described elastic member, the inwall welded seal of its other end and valve body.

Preferably, described valve body is made by brass material, and described sealed member is the tin bronze sheet.

Preferably, described valve also comprises: be arranged at the adjusting parts between described elastic member and the sealed member, an end of these adjusting parts is connected to described elastic member, and its other end engages with sealed member.

Preferably, described valve also comprises: be arranged at the diaphragm in the described inner space, it is divided into first chamber that is positioned at the diaphragm top and second chamber that is positioned at the diaphragm below with described inner space; Wherein, act on a side of described diaphragm, from second pressure in second chamber with act on the opposite side of described diaphragm from the 3rd pressure of elastic member from first pressure in first chamber.

Preferably, described first chamber is connected to bulb, and it transmits first pressure from the evaporator outlet side; And being full of the fluid that flows out from the opening between spool and the valve body in described second chamber, second pressure of this fluid acts on the bottom of diaphragm.

Preferably, described valve also comprises: thrust block, this thrust block be arranged on diaphragm below; And push rod, an end of this push rod is connected with described thrust block, and the other end of described push rod is connected with described elastic member, thereby the elastic force of described elastic member can be acted on diaphragm by push rod and thrust block.

Preferably, described elastic member is a helical spring.

Preferably, sealed member is by the inwall welded seal of laser bonding or soldering and valve body.

Preferably, described valve also comprises: fluid input and fluid output, wherein, described fluid input and fluid output are by being defined in the described opening fluid communication between spool and the valve body.

Not specific aspect in the technique scheme of the present utility model has following advantage and effect at least: at first, by using sealed member to replace three Sealings such as valve plug connecting head, O type circle and valve plug of prior art, thereby simplify the structure, reduced the raw-material use of sealed member and the size of valve.Secondly, cancel tunnel weldering step, the installation step of O type circle and the screw threads for fastening step of valve plug of valve plug connecting head and valve body, and directly adopted welding, thereby saved manufacturing process, reduced fabricating cost.In addition, overcome the loosening seal failure problem that cause of prior art, thereby valve of the present invention has firm, the safe and effective advantage of sealing owing to screw threads for fastening.

Description of drawings

Fig. 1 is the structural scheme of mechanism of a kind of expansion valve of prior art;

Fig. 2 is the schematic sectional view according to the utility model embodiment's valve;

Fig. 3 is the schematic sectional view that contains vaporizer according to the utility model embodiment.With

Fig. 4 is the schematic sectional view that contains balance tube according to the utility model embodiment.

Embodiment

Below in conjunction with the drawings and the specific embodiments the utility model is described further.Below example in expansion valve as an example, but the design of model utility can be applied to other suitable valve.

As shown in Figure 2, according to valve 10 of the present utility model, this valve 10 comprises valve body 2, and it is limited with inner space 22; Be arranged at spool 6 and valve seat 8 in the inner space 22 of described valve body 2; At one end be connected to the elastic member 16 in described spool 6 and the valve seat 8, described elastic member 16 applies elastic acting force in described spool 6 and the valve seat 8 to regulate the opening between described spool 6 and the valve body 2; And sealed member 20, an end of described sealed member 20 combines with described elastic member 16, the inwall welded seal of its other end and valve body 2.In the present embodiment, described elastic member 16 is helical springs, and an end of this elastic member 16 connection valve seat 8, elastic force can be acted on the valve seat 8.

Referring to Fig. 2, described valve 10 also comprises: fluid input 12 and fluid output 14, wherein, described fluid input 12 and fluid output 14 are by being defined in the opening fluid communication between spool 6 and the valve body 2.

In the present embodiment, valve body 2 is made by brass material, sealed member 20 is by the inwall welded seal of laser bonding and valve body 2, but the present invention is not limited to this, and sealed member 20 can also be by any suitable mode such as soldering, arc welding and the inwall welded seal of valve body 2.In a kind of preferred embodiment, described sealed member 20 is tin bronze sheets.

In addition, be arranged at the adjusting parts 18 between described elastic member 16 and the sealed member 20, an end of these adjusting parts 18 is connected to described elastic member 16, and its other end engages with sealed member 20.In a kind of specific embodiment, regulating parts 18 can be hexagon nut, the elastic force that this hexagon nut can regulate elastic member 16 acts on the valve seat 8, thus realized that preconditioning is arranged on the function of the elastic force of the elastic member 16 in the valve body 2.

In one embodiment, referring to Fig. 1, described valve 10 also comprises the diaphragm 4 that is arranged in the described inner space 22, and it is divided into first chamber 23 that is positioned at diaphragm 4 tops and second chamber 24 that is positioned at diaphragm 4 belows with described inner space 22; Wherein, act on a side of described diaphragm 4, from second pressure in second chamber 24 with act on the opposite side of described diaphragm 4 from the 3rd pressure of elastic member 16 from first pressure in first chamber 23.

As shown in Figure 3, particularly, described first chamber 23 is connected to bulb 34, and it transmits first pressure of from evaporator drier 32 outlet sides; And owing to the fluid that has been full of in described second chamber 24 between spool 6 and the valve body 2, so this fluid has produced second pressure.

Further, described valve 10 can also comprise: thrust block 36, this thrust block 36 be arranged on diaphragm 4 below; With the push rod (not shown), an end of this push rod is connected with described thrust block 36, and the other end of described push rod is connected with described spool 6, thereby the elastic force of described elastic member 16 can be acted on diaphragm 4 by push rod 38 and thrust block 36.The elastic force that is appreciated that described elastic member 16 is by driving pushing block 36 to push rod, with its elastic force act on diaphragm 4 below.

As shown in Figure 4, in one embodiment, sealing configuration of the present utility model also can be used for having on the expansion valve of balance tube 40.Described balance tube 40 can be connected to the outlet side of vaporizer 32.Thrust block 36, this thrust block 36 be arranged on diaphragm 4 below; With the push rod (not shown), an end of this push rod is connected with described thrust block 36, and the other end of described push rod is connected with described spool 6, thereby the elastic force of described elastic member 16 can be acted on diaphragm 4 by push rod 38 and thrust block 36.

Be appreciated that balance tube 40 also can be connected to the inlet side of vaporizer 32, the hydrodynamic pressure of vaporizer 32 be passed to the following of diaphragm 4 as long as guarantee.

The concrete working principle of the described valve 10 of present embodiment is as follows:

The size of the opening between spool 6 and the valve body 2 depends on diaphragm 4 residing positions, and diaphragm 4 residing determining positions are in the stressing conditions of diaphragm.When work, diaphragm 4 is subjected to the effect of three power: diaphragm 4 tops are subjected to first pressure of saturated gas in the bulb 34, and the below of diaphragm 4 is subjected to by second pressure of the refrigeration agent in second chamber 24 and the 3rd pressure of overheated spring.When three power are in state of equilibrium, that is: when first pressure equaled second pressure and the 3rd pressure sum, the opening between spool 6 and the valve body 2 was in a certain aperture, and it is certain that refrigerant flow keeps.When bulb 34 sensed temperature not simultaneously, first pressure that acts on diaphragm 4 tops changes, diaphragm 4 interacts by push rod and spool 6, thereby changes the size of the opening between spool 6 and the valve body 2, thereby regulates refrigerant flow.Though in the above-described embodiments, push rod links to each other with spool 6 and moves to change the size of the opening between spool 6 and the valve body 2 relative to valve seat 8 to drive it, and still obvious push rod also can link to each other with valve seat 8 and move to change the size of the opening between spool 6 and the valve body 2 to drive spool 6.

When the compressor (not shown) that is connected with fluid input 12 did not rotate, the pressure of diaphragm both sides about in the of 4 equated that under spring action, the opening between spool 6 and the valve body 2 is closed, and flows backwards to compressor to prevent refrigeration agent.Behind compressor operation, under the pressure of refrigeration agent, the active force of diaphragm 4 belows reduces, and opens the opening between spool 6 and the valve body 2, and refrigeration agent begins circulation.When temperature variation, first pressure of diaphragm 4 tops also changes thereupon, and the size of the opening between spool 6 and the valve body 2 also just takes place by corresponding the variation, thereby reaches the purpose of regulating refrigerant flow.

Compare with the sealing mechanism of valve of the prior art, the valve 10 in the present embodiment has the following advantages by sealed member 20 being welded on the bottom of valve body 2:

At first, replace three Sealings such as valve plug connecting head, O type circle and valve plug of prior art by using sealed member 20, thereby simplify the structure, reduced the raw-material use of sealed member and the size of valve 10.

Secondly, cancel tunnel weldering step, the installation step of O type circle and the screw threads for fastening step of valve plug of valve plug connecting head and valve body, and directly adopted welding, thereby saved manufacturing process, reduced fabricating cost.

In addition, overcome the loosening seal failure problem that cause of prior art, thereby valve of the present invention 10 has firm, the safe and effective advantage of sealing owing to screw threads for fastening.

Although described the utility model with reference to preferred enforcement, it will be recognized by those skilled in the art: under the situation that does not depart from essence of the present utility model and scope, can do the change of some forms and details.

Claims

1. valve, it comprises:

Valve body (2), it is limited with inner space (22);

Be arranged at spool (6) and valve seat (8) in the inner space (22) of described valve body (2);

At one end be connected to the elastic member (16) in described spool (6) and the valve seat (8), described elastic member (16) applies elastic acting force in described spool (6) and the valve seat (8) to regulate the opening between described spool (6) and the valve body (2)

It is characterized in that also comprising:

Sealed member (20), an end of described sealed member (20) combines with described elastic member (16), the inwall welded seal of its other end and valve body (2).

2. valve according to claim 1 is characterized in that:

Described valve body (2) is made by brass material, and described sealed member (20) is the tin bronze sheet.

3. valve according to claim 1 and 2 is characterized in that also comprising:

Be arranged at the adjusting parts (18) between described elastic member (16) and the sealed member (20), an end of these adjusting parts (18) is connected to described elastic member (16), and its other end engages with sealed member (20).

4. valve according to claim 1 is characterized in that also comprising:

Be arranged at the diaphragm (4) in the described inner space (22), it is divided into first chamber (23) that is positioned at diaphragm (4) top and second chamber (24) that is positioned at diaphragm (4) below with described inner space (22);

Wherein, act on a side of described diaphragm (4), from second pressure of second chamber (24) with act on the opposite side of described diaphragm (4) from the 3rd pressure of elastic member (16) from first pressure of first chamber (23).

5. valve according to claim 4 is characterized in that:

Described first chamber (23) is connected to bulb (34), and it transmits first pressure of from evaporator drier (32) outlet side; And being full of the fluid that flows out from the opening between spool (6) and the valve body (2) in described second chamber (24), second pressure of this fluid acts on the bottom of diaphragm (4).

6. according to claim 4 or 5 described valves, it is characterized in that also comprising:

Thrust block (36), this thrust block (36) be arranged on diaphragm (4) below; And push rod (38), one end of this push rod (38) is connected with described thrust block (36), the other end of described push rod (38) is connected with described spool (6), thereby the elastic force of described elastic member (16) can be acted on diaphragm (4) by spool (6), push rod (38) and thrust block (36).

7. valve according to claim 6 is characterized in that: described elastic member (16) is a helical spring.

8. valve according to claim 1 is characterized in that:

Sealed member (20) is by the inwall welded seal of laser bonding or soldering and valve body (2).

9. valve according to claim 1 and 2 is characterized in that also comprising:

Fluid input (12) and fluid output (14), wherein, described fluid input (12) and fluid output (14) are by being defined in the described opening fluid communication between spool (6) and the valve body (2).