CN114060534A

CN114060534A - Stop valve

Info

Publication number: CN114060534A
Application number: CN202010777253.5A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2022-02-18

Abstract

The invention discloses a stop valve, which comprises a valve body, a stop block and a valve rod; the valve body comprises a pipe body and a first connecting part, the first connecting part is integrally formed on the pipe body and is arranged on the peripheral wall of the pipe body, the valve body comprises a second connecting pipe, and the second connecting pipe and the pipe body are formed by processing the same pipe; the stop block is fixedly connected with the end part of the pipe body; the valve rod comprises a connecting part and a sealing part, the connecting part is in threaded connection with the stop block, and the sealing part can slide along the inner wall of the pipe body; the connecting part is provided with a limiting part at one end far away from the sealing part, and the limiting part is fixedly connected or in limiting connection with the connecting part; the valve rod can move along the axial direction of the pipe body so as to switch between a valve closing position and a valve opening position, in the valve closing position, the limiting part abuts against the upper end face of the stop block, and the first interface part and the second interface part are intercepted by the sealing part so as to be in a non-conduction state; in the valve-open position, the first port and the second port are in a conductive state. Each part of the stop valve is convenient to process, and the processing cost can be reduced.

Description

Stop valve

Technical Field

The invention relates to the field of refrigeration control, in particular to a stop valve.

Background

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

Before the air conditioner is installed, a fluid passage such as a refrigerant is disconnected through a stop valve, and after the air conditioner is installed, the fluid passage such as the refrigerant is communicated through the stop valve; the stop valve is also provided with a valve core, when the air conditioner is filled with refrigerant, the refrigerant can be filled through the valve core, and the valve body and the valve rod of the stop valve are structurally designed, namely, a valve seat structure with a valve port is generally processed in the valve body, or the valve seat structure with the valve port is fixed in the valve body as an independent component.

Disclosure of Invention

In order to solve the technical problem, the invention provides a stop valve, which comprises a valve body, a stop block and a valve rod;

the valve body comprises a pipe body and a first connecting part, the first connecting part is integrally formed on the pipe body, the first connecting part is arranged on the peripheral wall of the pipe body, the valve body comprises a second connecting pipe, and the second connecting pipe and the pipe body are formed by processing the same pipe;

the stop block is fixedly connected to the end part of the pipe body;

the valve rod comprises a connecting part and a sealing part, the connecting part is in threaded connection with the stop block, and the sealing part can slide along the inner wall of the pipe body; a limiting part is arranged at one end of the connecting part far away from the sealing part, and the limiting part is fixedly connected or in limiting connection with the connecting part;

the valve rod can move along the axial direction of the pipe body so as to switch between a closed valve position and an open valve position, in the closed valve position, the limiting part is abutted against the upper end surface of the stop block, and the first interface part and the second interface part are intercepted by the sealing part so as to be in a non-conduction state; in the valve-open position, the first port and the second port are in a conductive state.

The valve body of the stop valve comprises a pipe body, wherein a first connecting part is integrally formed on the pipe body, the first connecting part can be directly machined and formed on the pipe body in a drawing mode in practice, the valve body comprises a second connecting pipe, the second connecting pipe and the pipe body are machined and formed by the same pipe, and the structure is simple and convenient to machine and easy to form; the valve rod is provided with a sealing part for sliding sealing of the pipe body, a valve port structure is not processed in the valve body, the first interface part and the second interface part are cut off when the valve is closed through the sealing part arranged on the valve rod, namely, the first interface part and the second interface part are in a non-conduction state through the sealing part; the valve rod and the valve body move in the axial direction relatively, the valve rod and the check block fixedly connected to the upper end of the pipe body are matched with each other through threads, the machining difficulty of each part of the stop valve is low, and the machining cost can be reduced.

Drawings

FIG. 1 is a schematic diagram of a stop valve according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the shut-off valve of FIG. 1 in a closed valve position;

FIG. 2A is a partial enlarged view of portion A of FIG. 2;

FIG. 3 is a schematic cross-sectional view of the shut-off valve of FIG. 1 in a fully open position;

FIG. 4 is a schematic cross-sectional view of the shut-off valve of FIG. 1 at another angle with the shut-off valve in a closed valve position;

FIG. 5 is a schematic view of the valve stem of the shut-off valve of FIG. 1;

fig. 6 is a front view of fig. 5.

Description of reference numerals:

a tube body 110, a first interface part 111, a second interface part 112, a filling head hole part 114, a first adapter 130, a second adapter 140, a bend section 141, a straight tube section 142;

the valve rod 210, the connecting part 211, the external thread 2111, the annular groove 2112, the sealing part 212, the upper sealing section 2121, the lower sealing section 2122, the transition connecting section 2123, the annular mounting groove 2124, the inner polygonal hole 213, the O-shaped ring 220 and the limit retainer ring 230;

a stopper 300;

bonnet 400, seal ring 410;

a fill head 510, a valve core 520, a fill valve cap 530;

the plate 600 is mounted.

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.

Referring to fig. 1 to 6, fig. 1 is a schematic structural diagram of a stop valve according to an embodiment of the present invention; FIG. 2 is a schematic cross-sectional view of the shut-off valve of FIG. 1 in a closed valve position; FIG. 2A is a partial enlarged view of portion A of FIG. 2; FIG. 3 is a schematic cross-sectional view of the shut-off valve of FIG. 1 in a fully open position; FIG. 4 is a schematic cross-sectional view of the shut-off valve of FIG. 1 at another angle with the shut-off valve in a closed valve position; FIG. 5 is a schematic view of the valve stem of the shut-off valve of FIG. 1; fig. 6 is a front view of fig. 5.

In this embodiment, the shut-off valve includes a valve body, a stop 300, and a valve stem assembly; the valve stem assembly includes a valve stem 210, an O-ring 220 disposed on the valve stem 210, and a limit stop ring 230.

The valve body is of a tubular structure and specifically comprises a pipe body 110, a first connecting port part 111 and a second connecting port part 112, wherein the first connecting port part 111 and the second connecting port part 112 are integrally formed on the pipe body 110, and the first connecting port part 111 and the second connecting port part 112 are different in position in the axial direction of the pipe body 110.

Specifically, the first mouthpiece 111 is formed at a peripheral wall of the tube body 110, the second mouthpiece 112 is formed at a lower end of the tube body 110, the first mouthpiece 111 is connected with the first adapter 130, and the second mouthpiece 112 is connected with the second adapter 140.

In this embodiment, the second adapter 140 is formed by machining the same pipe as the pipe body 110.

It should be noted that the second connection port 112 is a concept introduced for convenience of description as a corresponding component with the first connection port 111, and in the present embodiment, the second connection pipe 140 is integrally formed with the pipe body 110, and there is no clearly defined boundary between the two, and therefore, it can be understood that the second connection port 112 is located between the second connection pipe 140 and the pipe body 110, as indicated by the reference numerals in fig. 2.

The stopper 300 has a ring structure having an internal thread and an external thread, and the stopper 300 is fixedly coupled to the upper end of the pipe body 110.

The valve stem 210 includes a connecting portion 211 and a sealing portion 212, which are integrally formed, wherein the sealing portion 212 is slidably sealed with the pipe body 110, and the connecting portion 211 is inserted into the stopper 300.

The connecting portion 211 of the valve stem 210 has an external thread 2111 (indicated in fig. 6), and the external thread 2111 of the connecting portion 211 and the internal thread of the stopper 300 form a thread pair by which the valve stem 210 can be moved in the axial direction of the tube body 110 to switch between a closed valve position, in which the first interface portion 111 and the second interface portion 112 are intercepted by the seal portion 212 to be in a non-conductive state, as shown in fig. 2, and a open valve position, in which the first interface portion 111 and the second interface portion 112 are in a conductive state, as shown in fig. 3.

It will be appreciated that in fig. 3, the shut-off valve is in a fully open state, i.e. the flow between the first port 111 and the second port 112 is at its maximum.

Referring to fig. 2, in the shut-off valve position, the sealing portion 212 of the valve stem 210 completely blocks the opening of the first interface portion 111, and the first interface portion 111 and the second interface portion 112 are in a non-conductive state because the sealing portion 212 is slidably sealed with the tube body 110.

As described above, in the stop valve provided in this embodiment, the valve body has a tubular structure, the first interface portion 111 and the second interface portion 112 are integrally formed on the pipe body 110, the second connection pipe 140 connected to the second interface portion 112 and the pipe body 110 are formed by machining the same pipe, when in actual machining, the first interface portion 111 can be directly machined and formed on the pipe body 110 by pulling, and there is no need to machine a valve port structure inside the valve body, the first interface portion 111 and the second interface portion 112 are stopped when the valve is closed by the sliding sealing fit of the sealing portion 212 of the valve stem 210 and the pipe body 110, and the axial movement of the valve stem 210 is realized by the threaded fit of the connecting portion 211 and the stopper 300 fixedly connected to the pipe body 110.

In addition, on the basis of the above structure, the valve body, the valve rod 210 and the stopper 300 may be made of stainless steel or other non-brass metal parts, for example, the pipe body 110 may be formed by drawing stainless steel pipe directly, so that the material of the main components of the stop valve may not be brass material commonly used at present, which can greatly reduce the material cost, and at the same time, the application range of the stop valve is wide, because some refrigerants, such as R466a refrigerant, are incompatible with brass and react, but there is no similar problem when stainless steel or other materials are used.

After the tube body 110 is made of stainless steel or other materials, the first connecting port 111 and the first connecting tube 130 can be connected by a conventional and simple welding method.

As shown in fig. 5 and 6, in this embodiment, the sealing portion 212 of the valve stem 210 specifically includes an upper sealing section 2121, a lower sealing section 2122 and a transition connecting section 2123, wherein the upper sealing section 2121 and the lower sealing section 2122 are connected by the transition connecting section 2123, the diameter of the transition connecting section 2123 is smaller than the diameters of the upper sealing section 2121 and the lower sealing section 2122, the diameters of the upper sealing section 2121 and the lower sealing section 2122 are adapted to the inner diameter of the pipe body 110, the upper sealing section 2121 and the lower sealing section 2122 are each provided with an annular mounting groove 2124, each annular mounting groove 2124 is provided with an O-ring 220, and thus, the valve stem 210 forms a sliding sealing structure with the pipe body 110 by the sealing portion 212 thereof.

In the scheme shown in the figure, the upper sealing section 2121 and the lower sealing section 2122 are both provided with only one annular mounting groove 2124, and in actual setting, two or more annular mounting grooves 2124 can be provided as required, and the O-ring 220 is correspondingly arranged as long as the requirements of relative movement between the sealing and valve rod 210 and the pipe body 110 can be met.

In this embodiment, the transition connecting section 2123 can reduce weight and save material, thereby further reducing cost.

With reference to fig. 2, after the above arrangement, in order to achieve the valve closing, in the valve closing position, the upper sealing section 2121 of the valve rod 210 is in sealing fit with the peripheral wall of the pipe body 110 at the upper end of the first interface portion 111, and the lower sealing section 2122 is in sealing fit with the peripheral wall of the pipe body 110 at the lower end of the first interface portion 111, so that the sealing portion 212 can block the first interface portion 111 and block the communication between the first interface portion and the second interface portion 112.

Referring to fig. 3, when the shut-off valve is in the fully open state, the lower end surface of the sealing portion 212 of the valve stem 210, i.e., the lower end surface of the lower sealing section 2122, should not be lower than the upper end surface of the first connecting port portion 111.

In order to limit the axial movement of the valve stem 210 relative to the tube body 110 to accurately control the closed valve position and the full valve position of the valve stem 210, the stop valve further comprises a first limit structure and a second limit structure, wherein the first limit structure is used for limiting the position of the valve stem 210 when the stop valve is in the full open state, and the second limit structure is used for limiting the position of the valve stem 210 when the stop valve is in the closed valve position, so that the valve stem 210 moves between the closed valve position and the full valve position when moving axially along the tube body 110 under the action of the limit structures.

In this embodiment, the first limiting structure includes a stopper 300, specifically, a lower end surface of the stopper 300 forms the first limiting structure, a diameter of the connecting portion 211 of the valve rod 210 is smaller than an inner diameter of the pipe body 110, and the connecting portion 211 is in threaded fit with the stopper 300, so that, in an axial projection plane of the pipe body 110, at least a part of the stopper 300 is located in a pipe cavity of the pipe body 110, when the stop valve is in a fully open state, the sealing portion 212 of the valve rod 210 abuts against the lower end surface of the stopper 300 to form a limiting position, specifically, an upper end surface of the upper sealing section 2121 of the sealing portion 212 abuts against a lower end surface of the stopper 300, as shown in fig. 3.

The stop valve includes spacing portion, and spacing portion sets up in connecting portion 211 to be located connecting portion 211 and keep away from the one end of sealing part 212, spacing portion and connecting portion 211 fixed connection or spacing connection.

In this embodiment, the limiting portion is a limiting retainer 230, that is, the second limiting structure of this embodiment includes the limiting retainer 230 and the stopper 300, the circumferential wall of the upper end portion of the connecting portion 211 of the valve stem 210 is provided with an annular groove 2112, the limiting retainer 230 is installed in the annular groove 2112 and radially extends out of the circumferential wall of the connecting portion 211, and when the stop valve is in the closed valve position, the limiting retainer 230 abuts against the upper end surface of the stopper 300 to limit the position of the valve stem 210 moving axially downward, as will be understood with reference to fig. 2 and fig. 2A.

It should be noted that the seal ring 410 between the stop 300 and the bonnet 400 is also pressed against the upper end surface of the stop 300, and in practice, interference between the seal ring 410 and the retainer ring 230 should be avoided.

On this basis, the valve stem assembly in this embodiment includes a valve stem 210, an O-ring 220 that mates with the valve stem 210, and a stop collar 230.

The above description has been given by taking the limit stop ring as an example, and based on the above technical teaching, those skilled in the art can make various changes to the structure of the limit portion, for example, the limit portion may also be connected to the connection portion 211 in a pin-type limit manner, or fixedly connected to the connection portion 211 in a welding manner. Such equivalent alternatives are intended to fall within the scope of the present invention.

The axial movement of the valve stem 210 with respect to the tube body 110 is achieved by rotating the valve stem 210, and when the valve stem 210 is rotated, the valve stem 210 can move up and down in the axial direction of the tube body 110 by a screw side effect with the stopper 300.

To facilitate manipulation of the stem 210, an inner polygonal hole 213 is formed at an upper end of the stem 210 to be engaged with an external tool.

In this embodiment, the second connecting pipe 140 includes a bent pipe section 141 and a straight pipe section 142, wherein the bent pipe section 141 connects the second connecting port 112 and the straight pipe section, and when machining, the pipe can be bent at a suitable position to form the second connecting pipe 140, it can be understood that, because the second connecting pipe 140 and the pipe body 110 are formed by machining the same pipe, the second connecting port 112 is not actually machined by a special process, and the connecting portion of the pipe body 110 of the pipe and the section of the second connecting pipe 140 forms the second connecting port 112.

Specifically, the axis of the straight tube section 142 is disposed in parallel with the axis of the first connecting port portion 111, so that the axial dimension of the shut-off valve can be reduced as much as possible, and the arrangement of the associated piping can be facilitated.

In this embodiment, a mounting plate 600 is further fixed outside the elbow section 141 of the second connection pipe 140 to facilitate the installation of the stop valve with external components.

The shutoff valve further comprises a filling structure 500, so that when needed, refrigerant is filled through the filling structure 500, and with reference to fig. 1 and 4, the filling structure 500 specifically comprises a filling head 510 and a valve core 520 installed in the filling head 510, and a filling valve cap 530 is further arranged at the outer end of the filling head 510 in a matching manner, so as to form a seal and protect the valve core 520.

The valve body is provided with a filling head hole part 114 for mounting the filling head 510, and in this embodiment, the filling head hole part 114 is integrally formed on the tube body 110, specifically, on the peripheral wall of the tube body 110, and may be formed by a drawing method.

When the valve core 520 is made of brass, a plating layer may be formed on the surface thereof so as to accommodate the aforementioned coolant which reacts with the brass material.

Filling bonnet 530 may be formed from a plastic material to reduce costs.

The stop valve further comprises a valve cap 400 sleeved on the stop block 300, the valve cap 400 is in threaded connection with the stop block 300, specifically, the stop block 300 further has an external thread structure, the valve cap 400 has an internal thread structure, and the arrangement of the valve cap 400 can form secondary sealing for the stop valve to prevent external impurities from entering. More specifically, a sealing ring 410 is provided between the bonnet 400 and the stopper 300 to ensure a sealing effect.

In a particular embodiment, the bonnet 400 has a receiving cavity that cooperates with the lumen of the body of tubing 110 to enable the valve stem 210 to be positioned within the sealed valve cavity formed by the bonnet 400 and the body of tubing 110 in both the fully open and closed valve positions, as will be appreciated with reference to fig. 2 and 3.

The bonnet 400 is also preferably made of a plastic material to save cost.

It should be noted that the filling structure 500 is mainly used for filling refrigerant into the pipeline of the refrigeration system, and theoretically, may be disposed at any position of the pipeline of the refrigeration system. The filling structure described in the above embodiment is formed in the shutoff valve, but the filling structure may not be provided in the shutoff valve body.

The stop valve 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.

Claims

1. The stop valve is characterized by comprising a valve body, a stop block and a valve rod;

the stop block is fixedly connected to the end part of the pipe body;

2. The shut-off valve of claim 1, wherein the connecting portion has a diameter smaller than an inner diameter of the pipe body, the shut-off valve being in a fully open state, the sealing portion abutting against a lower end surface of the stopper.

3. The shut-off valve of claim 1, wherein the second adapter comprises a bent section and a straight section, the bent section connecting the first pipe body and the straight section, the straight section having an axis arranged parallel to an axis of the first interface portion.

4. The shut-off valve of claim 1, wherein the sealing portion comprises an upper sealing section, a lower sealing section, and a transition connecting section, the upper sealing section and the lower sealing section are connected by the transition connecting section, the outer diameter of the transition connecting section is smaller than the outer diameter of the upper sealing section and the outer diameter of the lower sealing section, and the outer diameters of the upper sealing section and the lower sealing section are both adapted to the inner diameter of the pipe body; the upper sealing section and the lower sealing section are both provided with annular mounting grooves, and O-shaped rings are mounted in the annular mounting grooves.

5. The stop valve according to claim 1, wherein an annular groove is formed in an outer peripheral wall of the upper end portion of the connecting portion, and the limiting portion is a limiting retainer ring which is installed in the annular groove and radially extends out of the outer peripheral wall of the connecting portion.

6. The shut-off valve of claim 1, further comprising a fill head, a valve core, and a fill bonnet, the valve body further comprising a fill head bore portion for mounting the fill head, the fill head bore portion being integrally formed with the tube body, the valve core being disposed within the fill head, the fill bonnet being externally received by an outer end of the fill head.

7. The shut-off valve of claim 6, wherein the valve core is a brass piece having a plating; the filling valve cap is made of plastic.

8. The shut-off valve of any one of claims 1-7, wherein the valve body, the stop and the valve stem are all made of stainless steel material.

9. The shut-off valve of any one of claims 1-7, further comprising a bonnet disposed externally of and in threaded engagement with the stop; the valve cap with still be equipped with the sealing washer between the dog.

10. The shut-off valve of claim 9, wherein the bonnet is a plastic bonnet.