阅读说明：本技术 阀装置 (Valve device ) 是由 不公告发明人 于 2018-08-08 设计创作，主要内容包括：本发明公开了一种阀装置,包括阀体和阀杆,所述阀体设有阀口部,所述阀体包括第一连接部以及第二连接部,所述第一连接部具有第一连通通道,所述第二连接部具有第二连通通道,所述阀杆能够沿所述阀体的轴向移动以关闭或打开所述阀口部,以使所述第一连通通道与所述第二连通通道截止或连通；所述阀杆包括塑料材质的本体部和金属材质的杆头；所述本体部设有容纳部,所述杆头固定嵌装于所述容纳部；所述杆头具有旋紧孔。该阀装置使用较小的扭矩也能上紧阀杆实现其与阀口部的密封。(The invention discloses a valve device, which comprises a valve body and a valve rod, wherein the valve body is provided with a valve port part, the valve body comprises a first connecting part and a second connecting part, the first connecting part is provided with a first communication channel, the second connecting part is provided with a second communication channel, and the valve rod can move along the axial direction of the valve body to close or open the valve port part so as to stop or communicate the first communication channel with the second communication channel; the valve rod comprises a body part made of plastic and a rod head made of metal; the body part is provided with an accommodating part, and the rod head is fixedly embedded in the accommodating part; the club head has a spin-on hole. The valve device can tighten the valve rod to realize the sealing with the valve port part by using smaller torque.)

1. The valve device is characterized by being provided with a valve cavity, the valve device comprises a valve body and a valve rod, the valve body is provided with a valve opening part, the valve body comprises a first connecting part and a second connecting part, the first connecting part is provided with a first communication channel, the second connecting part is provided with a second communication channel, and the valve rod can axially move along the valve cavity to close or open the valve opening part so as to enable the first communication channel and the second communication channel to be stopped or communicated; the valve rod comprises a body part made of plastic and a rod head made of metal; the body part is provided with an accommodating part, and the rod head is fixedly embedded in the accommodating part; the club head has a spin-on hole.

2. The valve assembly of claim 1, wherein said spin-on hole is a blind hole configuration; the club head is fixedly embedded in the accommodating part in a press-fitting mode, and the peripheral wall of the club head and/or the hole wall of the accommodating part are/is provided with pressure relief grooves.

3. The valve device according to claim 1, wherein the screw hole has a through hole structure, and the stem head is fixedly fitted in the receiving portion by press fitting.

4. The valve device of claim 1, wherein the body portion and the stem head are formed by integral injection molding.

5. The valve device according to claim 1, wherein the tightening hole has a through-hole structure, the body further has a communication hole communicating with the housing, and a junction of the communication hole and the housing forms a stepped surface for supporting the head; the rod head is fixedly embedded in the accommodating part, and the communicating hole is communicated with the screwing hole.

6. A valve device according to any one of claims 1 to 5, wherein the part of the screwing hole which is matched with an external tool is of a polygonal hole structure.

7. A valve device according to any one of claims 1 to 5, wherein the stem head is of polygonal prismatic configuration and the receptacle is of polygonal hole configuration adapted to the stem head.

8. The valve device according to claim 7, wherein the rod head is embodied as a hexagonal prism structure and the receptacle is embodied as a hexagonal hole structure.

9. A valve device according to any one of claims 1-5, characterised in that the rod head is made of a brass or steel material.

Technical Field

The invention relates to the technical field of refrigeration control, in particular to a valve device for adjusting the flow of a refrigerant.

Background

In an air conditioning system, a shut-off valve is mainly used for connecting an indoor unit and an outdoor unit.

Generally, a stop valve comprises a valve body and a valve rod, wherein a first interface is arranged at the side part of the valve body, a second interface is arranged at the bottom part of the valve body, the valve body is also provided with a valve port part, and the first interface is communicated with the second interface through the valve port part; the valve rod is arranged in the inner cavity of the valve body, external threads are arranged on the periphery of the valve rod, internal threads matched with the external threads of the valve rod are arranged on the wall surface of the inner cavity of the valve body, and when the valve rod is rotated, the valve rod can move up and down along the inner cavity of the valve body under the action of a thread pair to close or open the valve opening part so as to cut off or conduct a passage between the first interface and the second interface.

Before the air conditioner is installed, the valve rod closes the valve port part to enable the first port and the second port to be in a closed state, namely, the fluid passages such as the refrigerant are disconnected, after the air conditioner is installed, the valve rod is rotated to move upwards to enable the valve rod to be separated from the valve port part to enable the first port and the second port to be communicated, namely, the fluid passages such as the refrigerant are communicated.

Wherein, valve body and valve rod adopt metal material such as brass or steel more, and when both seal, the valve rod seals for metal contact with the sealed of valve port portion, often need use great moment of torsion to tighten the valve rod just can reach sealed effect, so increased operator's intensity of labour.

In view of this, how to improve the structure of the stop valve, and achieve the sealing between the valve rod and the valve port portion with a smaller torque is a technical problem that needs to be solved by those skilled in the art at present.

Disclosure of Invention

To solve the above-mentioned problems, the present invention provides a valve device that can tighten a valve stem to achieve sealing with a valve port portion with a small torque.

The valve device comprises a valve body and a valve rod, wherein the valve body is provided with a valve opening part, the valve body comprises a first connecting part and a second connecting part, the first connecting part is provided with a first communication channel, the second connecting part is provided with a second communication channel, and the valve rod can move along the axial direction of the valve body to close or open the valve opening part so as to enable the first communication channel and the second communication channel to be closed or communicated; the valve rod comprises a body part made of plastic and a rod head made of metal; the body part is provided with an accommodating part, and the rod head is fixedly embedded in the accommodating part; the club head has a spin-on hole.

The valve rod of the valve device comprises a body part and a rod head, wherein the body part is made of plastic materials, the rod head is of a metal structure, the body part is provided with an accommodating part, the rod head is fixedly embedded in the accommodating part, the rod head is provided with a screwing hole, compared with metal sealing in the background technology, the hardness of plastic is relatively low, the sealing torque required for screwing the valve rod is relatively small, and the valve rod can be tightened to realize sealing with the valve port even with small torque.

Drawings

FIG. 1 is a schematic cross-sectional view of one embodiment of a valve assembly according to the present invention;

FIG. 2 is a schematic structural view of a first embodiment of a valve stem of the valve apparatus provided by the present invention;

FIG. 3 is a cross-sectional schematic view of the valve stem of FIG. 2;

FIG. 4 is a cross-sectional schematic view of the body portion of the valve stem of FIG. 3;

FIG. 5 is a schematic diagram of a tip of the valve stem of FIG. 2;

FIG. 6 is a schematic cross-sectional view of the club head shown in FIG. 5;

FIG. 7 is a schematic structural view of another club head adapted to the body of FIG. 4;

FIG. 8 is a schematic cross-sectional view of a second embodiment of a valve stem of the valve apparatus provided by the present invention;

FIG. 9 is a cross-sectional schematic view of the body portion of the valve stem of FIG. 8;

FIG. 10 is a cross-sectional view of the tip of the valve stem of FIG. 8.

Description of reference numerals:

a valve body 100, a first communication passage 110, a second communication passage 120, a valve port portion 130;

the valve rod 200, the body part 210, the accommodating part 211, the sealing surface 212, the annular groove 213, the rod head 220, the screwing hole 221 and the pressure relief groove 222;

the valve stem 200 ', the body portion 210 ', the accommodating portion 211 ', the step surface 2111 ', the sealing surface 212 ', the annular groove 213 ', the communication hole 214 ', the stem head 220 ', and the tightening hole 221 ';

a bonnet 300, a retainer ring 400, an O-ring 500, and a filling structure 600.

Detailed Description

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

It should be noted that the terms upper, lower, left and right, etc. as used herein are defined with reference to the figures, wherein the axial direction refers to the axial direction of the valve device, and the positions of the components relative to each other; it is to be understood that the directional terms are used merely for clarity and convenience in describing the technical solutions and should not be construed as limiting the scope of protection.

Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a valve device according to an embodiment of the present invention.

The valve device is used as an operable manual switch valve, namely, the valve device cuts off a refrigerant passage before an air conditioner is installed and connects the refrigerant passage after the air conditioner is installed.

The valve device comprises a valve body 100 and a valve rod 200, wherein the left side wall of the valve body 100 is provided with a first connecting part, the first connecting part is provided with a first communicating channel 110, the lower end of the valve body is provided with a second connecting part, and the second connecting part is provided with a second communicating channel 120; the valve body 100 also has a valve port portion 130 formed therein, and the first communication passage 110 communicates with the second communication passage 120 through the valve port portion 130.

Normally, a valve seat is fixedly installed in the valve body 100, and the valve port 130 is formed on the valve seat, but the valve port 130 may be directly formed in the inner cavity of the valve body 100.

The valve stem 200 is provided in the valve body 100 to close or open the valve opening portion 130 to block or communicate the first communication passage 110 with the second communication passage 120.

The valve rod 200 is provided with external threads, and the wall surface of the inner cavity of the valve body 100 is provided with internal threads matched with the external threads of the valve rod 200; when the valve stem 200 is rotated, the valve stem 200 can move up and down along the axial direction of the valve body 100 under the action of the internal thread and the external thread, and contact with or separation from the valve port portion 130 is achieved, so as to close or open the valve port portion 130.

An O-ring 500 is further disposed between the valve stem 200 and the valve body 100 to prevent the refrigerant between the valve body 100 and the valve stem 200 from leaking.

A retainer ring 400 is provided on the outside of the valve stem 200 to limit the position of the valve stem 200 moving upward in the axial direction, thereby preventing the valve stem 200 from being separated from the valve body 100.

A bonnet 300 is also attached to the upper end of the valve body 100 to effect a secondary seal.

To facilitate filling of the air conditioner with refrigerant, the valve device further includes a filling structure 600.

The focus here is on improving the valve stem 200 of the valve assembly, and the specific structure of the valve stem 200 will be described in detail below.

Referring to fig. 2 to 6 together, fig. 2 is a schematic structural diagram of a valve stem of a valve device according to a first embodiment of the present invention; FIG. 3 is a cross-sectional schematic view of the valve stem of FIG. 2; FIG. 4 is a cross-sectional schematic view of the body portion of the valve stem of FIG. 3; FIG. 5 is a schematic diagram of a tip of the valve stem of FIG. 2; FIG. 6 is a cross-sectional view of the club head shown in FIG. 5.

In this embodiment, the valve stem 200 of the valve device includes a main body 210 made of plastic and a stem head 220 made of metal, the main body 210 has an accommodating portion 211 adapted to the stem head 220, and the stem head 220 is fixedly embedded in the accommodating portion 211; the stem head 220 has a fastening hole 221 for engaging with an external tool, and the lower end of the body 210 has a sealing surface 212 for engaging with the valve port 130 of the valve device.

As described above, the valve stem 200 is composed of the body 210 and the stem head 220, wherein the body 210 is made of plastic, the stem head 220 is made of metal, the body 210 is provided with the accommodating portion 211, the stem head 220 is fixedly embedded in the accommodating portion 211, and the stem head 220 is provided with the screwing hole 221 matched with an external tool, that is, when the valve stem 200 is rotated, the external tool is matched with the screwing hole 221 of the stem head 220 to rotate the valve stem 200 to move along the axial direction of the valve device; the body portion 210 forms a sealing surface 212 that mates with the valve port portion 130; when the valve rod 200 is arranged in this way, the sealing contact surface of the valve rod 200 and the valve port 130 is the sealing fit of the metal surface and the plastic surface, and compared with the sealing of the pure metal surface in the background art, because the hardness of the plastic is low, the sealing torque required for screwing the valve rod 200 to ensure the sealing performance is relatively small, and the valve rod can be tightened to realize the sealing with the valve port by using the small torque. Meanwhile, since the head 220 of the valve rod 200 is made of metal, when the valve rod is tightened, the external tool is matched with the head 220, so that the strength of the tightening operation part can be ensured, and the phenomena of slipping and the like are avoided. Therefore, the structural design of the valve rod 200 can reduce the labor intensity of operators and shorten the operation time.

In addition, compared with the valve rod made of pure metal in the background art, the rod head 220 of the valve rod 200 is made of plastic, so that the cost can be reduced.

In a specific embodiment, the body 210 has an annular groove 213 at an upper end thereof for accommodating the O-ring 500, that is, after the valve stem 200 is assembled to the valve body 100 of the valve device, the annular groove 213 and the inner peripheral wall of the valve body 100 form a space for accommodating the O-ring 500, as can be understood with reference to fig. 1.

Of course, the outer circumferential wall of the body portion 210 is provided with an external thread to be engaged with the internal thread of the inner wall of the valve body 100.

The sealing surface 212 at the lower end of the body 210 is configured to fit the valve port 130, and may be configured to contact and seal with the valve port 130.

Because the body 210 is made of plastic, an injection molding method can be selected during processing, so as to save processing procedures and improve production efficiency; of course, other processing methods can be used.

In this embodiment, the screwing hole 221 of the rod head 220 is a blind hole structure, as shown in fig. 3 and 6, a portion of the screwing hole 221, which is matched with an external tool, is a polygonal hole structure, so as to apply a torque to the valve rod 200 and drive the valve rod 200 to move.

In the illustrated embodiment, the tightening hole 221 is a hexagonal hole structure, and accordingly, a hexagonal wrench may be used as the external tool. In actual installation, the specific structural form of the screwing hole 221 may be other, and an external tool is correspondingly configured, so long as the external tool is convenient to drive the valve rod 200 to axially move.

In a specific scheme, the club head 220 is a polygonal prism structure, and the accommodating part 211 is a polygonal hole structure matched with the club head 220, and the structural design can effectively prevent the club head 220 and the body part 210 from rotating relatively, and ensure that the club head 220 and the body part 210 act as a whole.

In the illustrated embodiment, the club head 220 has a hexagonal prism structure, and the accommodating portion 211 has a hexagonal hole structure.

In a specific scheme, the rod head 220 and the body portion 210 can be relatively fixed in an integral injection molding manner, and the operation is simple, convenient and reliable.

In other embodiments, the rod head 220 may be fixed in the accommodating portion 211 of the body portion 210 by press-fitting.

When the club head 220 is fixedly embedded in the body 210 by press-fitting, if the screwing hole 221 of the club head 220 is still a blind hole structure as described above, in order to ensure the operability of press-fitting, at this time, a pressure relief groove 222 is formed on the outer peripheral wall of the club head 220, which can be understood with reference to fig. 7; otherwise, the other main structures of the club head 220 and the body portion 210 are arranged similarly to the above.

In actual installation, the pressure relief groove may be formed in the inner wall of the accommodating portion 211, or the outer peripheral wall of the stem head 220 and the inner wall of the accommodating portion 211 may be formed with the pressure relief groove.

In a specific embodiment, the rod head 220 may be made of brass material or steel material.

Referring to fig. 8 to 10, fig. 8 is a schematic cross-sectional view illustrating a second embodiment of a valve stem of a valve device according to the present invention; FIG. 9 is a cross-sectional schematic view of the body portion of the valve stem of FIG. 8; FIG. 10 is a cross-sectional view of the tip of the valve stem of FIG. 8.

In this embodiment, the valve stem 200 ' of the valve device also includes a body 210 ' made of plastic and a head 220 ' made of metal; the body 210 'also has a receiving portion 211' adapted to the club head 220, and the club head 220 'is fixedly embedded in the receiving portion 211'.

The body portion 210 ' also has an annular groove 213 ' at its upper portion for receiving the O-ring 500, and a sealing surface 212 ' at its lower end for engaging with the valve port portion 130, although the outer peripheral wall thereof is also externally threaded.

As shown in the figure, the tightening hole 221 'of the club head 220' has a through hole structure, that is, the tightening hole 221 'penetrates through the top wall and the bottom wall of the club head 220'.

This configuration of the head 220 'facilitates the machining of the spin-on hole 221'. Meanwhile, since the tightening hole 221 'is in the form of a through hole, when the club head 220' is press-fitted into the receiving portion 211 'of the body portion 210', a pressure relief groove structure is not required, and the assembly is convenient.

Of course, it can be understood that the shaft head 220 'and the body portion 210' can be fixed together by injection molding regardless of the structure of the tightening hole 221 'of the shaft head 220'.

In a specific embodiment, the body 210 ' further has a communication hole 214 ' communicating with the receiving portion 211 ', a step 2111 ' for supporting the rod head 220 ' is formed at a connection portion of the communication hole 214 ' and the receiving portion 211 ', and the communication hole 214 ' is communicated with the fastening hole 221 ' after the rod head 220 ' is fixedly fitted in the receiving portion 211 '.

The communication hole 214' can be used as a positioning hole during processing to ensure coaxiality and reduce cost.

It is understood that it is also possible that the body portion 210 'is not provided with the communication hole 214'.

In this embodiment, the structural form of the club head 220 'and the structural form of the fastening hole 221', etc. can be arranged in reference to the first embodiment, and will not be described again.

The valve device provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.