CN114060535A - Stop valve and stop valve assembling method - Google Patents

Abstract

The invention discloses a stop valve and an assembly method thereof, wherein the stop valve 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 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 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 valve rod can move along the axial direction of the pipe body to switch between a valve-closing position and a valve-opening position, and in the valve-closing position, the first interface part and the second interface part are intercepted by the sealing part 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 and stop valve assembling method

Technical Field

The invention relates to the field of refrigeration control, in particular to a stop valve and an assembly method of the 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

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, and 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;

the valve stem is movable in an axial direction of the tube body to switch between a closed valve position in which the first interface portion and the second interface portion are intercepted by the seal portion to be in a non-conductive state and an open valve position; in the valve-open position, the first port and the second port are in a conductive state.

The valve body of the stop valve is of a tubular structure and specifically 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 processing degree of difficulty of each part of this stop valve is low, can reduce the processing cost.

The invention also provides an assembly method of the stop valve, the stop valve comprises a valve body, a stop block, a valve rod assembly, a first connecting pipe and a second connecting pipe, wherein the valve rod assembly comprises a valve rod and an O-shaped ring sleeved on the valve rod; the assembling method comprises the following steps:

preparing the valve body: preparing a pipe, drawing the peripheral wall of the upper section of the pipe to form a first interface part, forming a second interface part at the lower port of the upper section of the pipe, and forming a pipe body of the valve body at the upper section of the pipe; bending the lower section of the pipe to form a bent pipe section and a straight pipe section connected with the bent pipe section, wherein the bent pipe section and the straight pipe section form the second connecting pipe connected with the second connector; the axis of the straight pipe section is parallel to the axis of the first connecting port part;

the first connecting pipe is fixedly connected with the first interface part;

and the valve rod assembly is arranged in the pipe body, the stop block is fixed at the upper end of the pipe body, and the stop block is sleeved outside the connecting part of the valve rod and is in threaded fit with the connecting part of the valve rod.

According to the assembly method of the stop valve, the valve body and the second connecting pipe can be manufactured by drawing and bending the same pipe, and the processing difficulty and the processing cost are relatively low.

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. 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 connecting port 111, a second connecting port 112, a convex portion 113, a filling head hole portion 114, a first connecting pipe 130, a second connecting pipe 140, a bent pipe section 141, a straight pipe section 142;

the valve rod 210, the connecting part 211, the external thread 2, 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 and the O-shaped ring 220;

a stopper 300;

bonnet 400, seal ring 410;

a filling structure 500, a filling head 510, a valve core 520, a filling bonnet 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. 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; wherein the valve stem assembly includes a valve stem 210 and an O-ring 220 disposed on the valve stem 210.

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.

In this embodiment, the valve stem 210 and the O-ring 220 form a valve stem assembly.

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.

In this embodiment, the second limiting structure comprises a protrusion 113 integrally formed on the pipe body 110, the peripheral wall of the pipe body 110 is recessed radially inwards to form the protrusion 113, obviously, the protrusion 113 is located between the first interface part 111 and the second interface part 112, the stop valve is in the closed valve position, and the sealing part 212 of the valve rod 210 abuts against the protrusion 113 to form a limit, as shown in fig. 2.

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.

In addition to the shut-off valve described above, the present invention provides a method of assembling a shut-off valve, the shut-off valve being constructed as described above, the method comprising:

preparing a valve body: preparing a tube, drawing and forming a first connecting port part 111 and a filling head hole part 114 on the peripheral wall of the upper section of the tube, wherein the lower port of the upper section of the tube is a second connecting port part 112, and the upper section of the tube forms a tube body 110 of the valve body; the lower end of the pipe is bent to form a bent pipe section 141 and a straight pipe section 142 connected with the bent pipe section 141, and the bent pipe section 141 and the straight pipe section 142 form a second connecting pipe 140 connected with the second connector 112; wherein the axis of the straight tube section 142 is parallel to the axis of the first interface portion 111.

In a specific scheme, when the valve body is manufactured, the peripheral wall of the upper section of the pipe is pressed to be recessed towards the inside of the pipe to form a convex part 113 which is protruded inwards from the inner peripheral wall of the pipe, the pressing position is located between the first connecting port part 111 and the second connecting port part 112, namely, the formed convex part 113 is located between the first connecting port part 111 and the second connecting port part 112, and after the sealing part 212 of the valve rod 210 is abutted to the convex part 113, the first connecting port part 111 and the second connecting port part 112 are in a non-conduction state.

After the valve body is prepared, the first connecting pipe 130 is fixedly connected with the first connecting port part 111, the filling head 510 is fixedly connected with the filling head hole part 114, the second connecting pipe 140 is fixedly connected with the mounting plate 600, and all the relevant parts can be fixedly connected by adopting a welding mode, so that the valve body is simple and reliable.

The valve stem assembly is assembled in advance, and then is loaded into the pipe body 110 from the upper end opening of the pipe body 110, and then the stopper 300 is fixedly connected to the upper end of the pipe body 110, wherein the stopper 300 is sleeved on the connecting portion 211 of the valve stem 210 and is in threaded fit with the connecting portion 211, and the valve cap 400, the sealing ring 410 and the stopper 300 are assembled after the stopper 300 is fixed.

The other components of the inflation structure 500 are installed.

It should be noted that, in the above assembling steps, the components that are not related to each other do not have an essential sequence of assembly, and can be assembled according to the actual needs.

The stop valve and the method for assembling the stop valve provided by the invention are 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 (11)

1. The stop valve is characterized by comprising 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 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;

the valve stem is movable in an axial direction of the tube body to switch between a closed valve position in which the first interface portion and the second interface portion are intercepted by the seal portion to be in a non-conductive state and an open valve position; in the valve-open position, the first port and the second port are in a conductive state.

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. A stop valve as claimed in claim 2, wherein the junction of the tube body and the second connector forms a second interface portion, and further comprising a stop formation integrally formed with the tube body, the stop formation being located between the first interface portion and the second interface portion, the stop formation being a projection formed by a circumferential wall of the tube body which is radially inwardly recessed, the sealing portion abutting the projection in the closed valve position.

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

5. 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.

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 any one of claims 1-6, wherein the valve body, the stop and the valve stem are all made of stainless steel material.

8. The shut-off valve of any one of claims 1-6, 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.

9. The assembly method of the stop valve is characterized in that the stop valve comprises a valve body, a stop block, a valve rod assembly, a first connecting pipe and a second connecting pipe, wherein the valve rod assembly comprises a valve rod and an O-shaped ring sleeved on the valve rod; the assembling method comprises the following steps:

preparing the valve body: preparing a pipe, drawing the peripheral wall of the upper section of the pipe to form a first interface part, forming a second interface part at the lower port of the upper section of the pipe, and forming a pipe body of the valve body at the upper section of the pipe; bending the lower section of the pipe to form a bent pipe section and a straight pipe section connected with the bent pipe section, wherein the bent pipe section and the straight pipe section form the second connecting pipe connected with the second connector; the axis of the straight pipe section is parallel to the axis of the first connecting port part;

the first connecting pipe is fixedly connected with the first interface part;

and the valve rod assembly is arranged in the pipe body, the stop block is fixed at the upper end of the pipe body, and the stop block is sleeved outside the connecting part of the valve rod and is in threaded fit with the connecting part of the valve rod.

10. The assembly method according to claim 9, wherein the valve body is prepared by drawing a filling head hole portion on a peripheral wall of the tube upper section, and thereafter, fixedly attaching a filling head to the filling head hole portion.

11. The assembling method according to claim 10, wherein when the valve body is prepared, a peripheral wall of the upper tube is pressed so as to be recessed toward the inside of the tube to form a protrusion protruding inward from the inner peripheral wall of the tube, the protrusion is located between the first connecting port portion and the second connecting port portion, and the first connecting port portion and the second connecting port portion are in a non-conductive state in a state where the seal portion of the valve stem abuts against the protrusion.

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