CN116146718A - Stop valve, processing method and assembly method - Google Patents

Abstract

The invention provides a stop valve, a processing method and an assembling method, wherein the stop valve comprises the following components: the two ends of the valve tube are an operation end and a plugging end respectively, a first interface and a second interface are arranged on the side wall of the valve tube, the first interface and the second interface are communicated with the cavity of the valve tube, and the second interface is close to the plugging end relative to the first interface; the valve seat is of an integrated structure and comprises a guide pipe and a mounting seat which are connected with each other, the guide pipe penetrates into a cavity of the valve pipe, the mounting seat plugs an opening of the plugging end, an avoidance port is formed in the side wall of the guide pipe and communicated with the second interface, the opening at the end part of the guide pipe forms a valve port, and the valve port is positioned between the first interface and the second interface; the valve core is movably arranged in the cavity of the valve pipe so as to close or open the valve port; wherein, valve pipe and disk seat are stainless steel material. The technical scheme provided by the invention can solve the problems of difficult processing and assembly and high cost in the prior art.

Description

Stop valve, processing method and assembly method

Technical Field

The invention relates to the technical field of stop valves, in particular to a stop valve, a processing method and an assembly method.

Background

Currently, the existing stop valve is generally composed of a valve body, a valve core and other structures, and the valve opening or closing of the valve port is realized by up-and-down movement of the valve core in the valve body. In the prior art, the valve body and the valve core are made of brass generally, the brass material cost is relatively high, and the valve body is of an integrated structure, the structure is relatively complex, so that the valve body is difficult to be actually machined and the whole assembly of the stop valve is carried out, and the machining cost is increased.

Disclosure of Invention

The invention provides a stop valve, a processing method and an assembling method, which are used for solving the problems of difficult processing and assembling and high cost of the stop valve in the prior art.

In order to solve the above-described problems, according to an aspect of the present invention, there is provided a shut-off valve comprising: the two ends of the valve tube are an operation end and a plugging end respectively, a first interface and a second interface are arranged on the side wall of the valve tube, the first interface and the second interface are communicated with the cavity of the valve tube, and the second interface is close to the plugging end relative to the first interface; the valve seat is of an integrated structure and comprises a guide pipe and a mounting seat which are connected with each other, the guide pipe penetrates into a cavity of the valve pipe, the mounting seat plugs an opening of the plugging end, an avoidance port is formed in the side wall of the guide pipe and communicated with the second interface, the opening at the end part of the guide pipe forms a valve port, and the valve port is positioned between the first interface and the second interface; the valve core is movably arranged in the cavity of the valve pipe so as to close or open the valve port; wherein, valve pipe and disk seat are stainless steel material.

Further, in the radial direction of the valve tube, the size of the mounting seat is larger than the outer diameter of the valve tube; the flow area of the avoidance port is not smaller than that of the second port.

Further, the guide pipe comprises a pipe body and an annular convex rib arranged at one end of the pipe body, the other end of the pipe body is connected with the mounting seat, the avoidance opening is positioned on the pipe body, the outer wall of the pipe body is connected with the inner wall of the valve pipe, the outer diameter of the annular convex rib is smaller than the outer diameter of the pipe body, and the opening of the annular convex rib forms a valve port.

Further, a buffer chamber is formed in the guide tube in a space between the avoidance port and the blocking end.

Further, the outer wall of the valve core is provided with external threads, the valve core is internally provided with an operation part, the operation part is positioned at one side of the valve core deviating from the valve port, and the stop valve further comprises: the briquetting, set up in the cavity of valve pipe, the outer wall of briquetting and the inner wall fixed connection of valve pipe, the briquetting has the internal thread, internal thread and external screw thread cooperation, and the briquetting is stainless steel.

Further, one side of the pressing block facing the valve port is provided with an annular groove, the stop valve further comprises a first sealing gasket, the first sealing gasket is sleeved on the valve core, and the first sealing gasket is matched with a peripheral stop of the annular groove.

Further, the side wall of the valve core is provided with a first annular groove and a second annular groove, the stop valve further comprises a sealing piece and a second sealing gasket, the sealing piece is positioned in the first annular groove, the sealing piece is in sealing fit with the inner wall of the valve pipe, and the second sealing gasket is positioned in the second annular groove; wherein, under the condition that the valve port is closed, the second sealing gasket is abutted with the periphery of the valve port.

Further, the case includes the first pole section, second pole section and the third pole section that connect gradually, and the diameter of second pole section is greater than the diameter of first pole section, third pole section, and the diameter of third pole section is less than the diameter of valve port, and the both ends of second pole section are provided with first ring channel and second ring channel respectively, and wherein, the opening of first ring channel is towards the inner wall of valve pipe, and the opening of second ring channel is towards the guide pipe.

Further, the stop valve further includes: one end of the first connecting pipe is connected with the first interface, and the first connecting pipe is made of stainless steel; one end of the second connecting pipe is connected with the second interface, the second connecting pipe is arranged in parallel with the first connecting pipe, and the second connecting pipe is made of stainless steel; the third connecting pipe is sleeved at one end of the first connecting pipe far away from the first interface; and the fourth connecting pipe is sleeved at one end of the second connecting pipe far away from the second interface.

Further, the side wall of the valve pipe is also provided with an air vent, the air vent is communicated with the cavity of the valve pipe, and the stop valve further comprises a valve structure which is connected with the air vent.

According to another aspect of the present invention, there is provided a processing method for processing the above-described shutoff valve, the processing method comprising: a plurality of flanging openings are formed in the side wall of the stainless steel pipe by flanging to process a valve pipe of the stop valve; machining the stainless steel rod to form the valve seat of the stop valve; carrying out cold heading and cutting processing on the stainless steel rod to process a valve core of the stop valve; cutting the stainless steel rod or the stainless steel pipe to obtain the pressing block of the stop valve.

According to another aspect of the present invention, there is provided an assembling method for assembling the above-described shut-off valve, the assembling method comprising: s1: pressing a guide pipe of a valve seat of the stop valve into a valve pipe of the stop valve, and correspondingly pressing a first connecting pipe, a second connecting pipe and a valve mouth of the stop valve into a first interface, a second interface and a vent of the valve pipe; s2: brazing the assembled structure in the S1 in a whole furnace; s3: sleeving a first sealing gasket, a second sealing gasket and a sealing piece of the stop valve on a valve core of the stop valve; s4: the structure integrated in the S3 is installed in a valve pipe; s5: pressing a pressing block of the stop valve into the valve pipe, and then connecting the pressing block with the valve pipe through laser welding or argon arc welding.

By applying the technical scheme of the invention, the invention provides a stop valve, which comprises the following components: the two ends of the valve tube are an operation end and a plugging end respectively, a first interface and a second interface are arranged on the side wall of the valve tube, the first interface and the second interface are communicated with the cavity of the valve tube, and the second interface is close to the plugging end relative to the first interface; the valve seat is of an integrated structure and comprises a guide pipe and a mounting seat which are connected with each other, the guide pipe penetrates into a cavity of the valve pipe, the mounting seat plugs an opening of the plugging end, an avoidance port is formed in the side wall of the guide pipe and communicated with the second interface, the opening at the end part of the guide pipe forms a valve port, and the valve port is positioned between the first interface and the second interface; the valve core is movably arranged in the cavity of the valve pipe so as to close or open the valve port; wherein, valve pipe and disk seat are stainless steel material. By adopting the scheme, the valve body is arranged into a split structure by arranging the valve pipe and the valve seat, and the valve pipe and the valve seat are respectively connected after being processed to form the integral structure of the valve body, so that the processing difficulty of the valve body is reduced by arrangement; the valve seat is arranged into an integrated structure, so that the valve seat is convenient to process and assemble; the valve tube and the valve seat are made of stainless steel, so that the production cost is reduced. In the application, the first interface and the second interface can be connected or disconnected, namely the valve port is opened or closed, by the valve core moving up and down in the cavity of the valve pipe; the guide pipe is arranged, so that the guide pipe can play a role in guiding during assembly; the avoiding port is communicated with the second port, so that fluid can be ensured to smoothly flow into the cavity of the valve tube.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 shows an exploded view of a shut-off valve provided by an embodiment of the present invention;

FIG. 2 shows a cross-sectional view of the shut-off valve of FIG. 1;

FIG. 3 shows a cross-sectional view of the shut-off valve of FIG. 2 in another position;

FIG. 4 shows a block diagram of the valve seat of FIG. 1;

FIG. 5 shows a cross-sectional view of the valve seat of FIG. 4;

FIG. 6 shows a block diagram of the valve cartridge of FIG. 1;

FIG. 7 shows a cross-sectional view of the valve cartridge of FIG. 6;

fig. 8 shows a cross-sectional view of the compact of fig. 1.

Wherein the above figures include the following reference numerals:

10. a valve tube; 11. an operation end; 12. plugging the end; 13. a first interface; 14. a second interface;

20. a valve seat; 21. a guide tube; 211. an avoidance port; 212. a tube body; 213. annular convex ribs; 22. a mounting base; 23. a buffer chamber; 24. a valve port;

30. a valve core; 31. an operation unit; 32. a first annular groove; 33. a second annular groove; 34. a first pole segment; 35. a second pole segment; 36. a third pole segment;

40. briquetting; 41. an annular groove;

51. a first gasket; 52. a seal; 53. a second gasket; 541. a first connection pipe; 542. a second connection pipe; 551. a third connection pipe; 552. a fourth connection pipe; 56. a vent; 57. and a valve structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 8, an embodiment of the present invention provides a shut-off valve including: the valve tube 10, two ends of the valve tube 10 are an operation end 11 and a plugging end 12 respectively, a first interface 13 and a second interface 14 are arranged on the side wall of the valve tube 10, the first interface 13 and the second interface 14 are communicated with the cavity of the valve tube 10, and the second interface 14 is close to the plugging end 12 relative to the first interface 13; the valve seat 20 and the valve seat 20 are of an integrated structure, the valve seat 20 comprises a guide pipe 21 and an installation seat 22 which are connected with each other, the guide pipe 21 penetrates into a cavity of the valve pipe 10, the installation seat 22 seals an opening of the plugging end 12, an avoidance port 211 is formed in the side wall of the guide pipe 21, the avoidance port 211 is communicated with the second interface 14, a valve port 24 is formed in an opening at the end part of the guide pipe 21, and the valve port 24 is positioned between the first interface 13 and the second interface 14; a valve spool 30 movably disposed in the cavity of the valve tube 10 to close or open the valve port 24; wherein, valve tube 10, valve seat 20 and valve core 30 are all made of stainless steel.

By adopting the scheme, the valve body is arranged into a split structure by arranging the valve pipe 10 and the valve seat 20, and the valve pipe 10 and the valve seat 20 are respectively processed and then connected to form the integral structure of the valve body, so that the processing difficulty of the valve body is reduced by the arrangement; the valve seat 20 is arranged into an integral structure, so that the processing and the assembly are convenient; the valve tube 10 and the valve seat 20 are made of stainless steel, so that the production cost is reduced. In the present application, the first port 13 and the second port 14 can be connected or disconnected, i.e. the valve port is opened or closed, by moving the valve core 30 up and down in the cavity of the valve tube 10; a guide tube 21 is provided to perform a guide function during assembly; the avoiding port 211 is communicated with the second port 14, so that fluid can be ensured to smoothly flow into the cavity of the valve tube 10.

Wherein, in the radial direction of the valve tube 10, the size of the mounting seat 22 is larger than the outer diameter of the valve tube 10; the flow area of the relief port 211 is not smaller than the flow area of the second port 14. By sizing the mount 22 to be larger than the outer diameter of the valve tube 10, it can be ensured that the mount 22 seals off the opening of the capped end 12; the flow area of the avoidance port 211 is set to be not smaller than the flow area of the second port 14, so that smooth flow of fluid is facilitated.

Further, the guide tube 21 comprises a tube body 212 and an annular rib 213 arranged at one end of the tube body 212, the other end of the tube body 212 is connected with the mounting seat 22, the avoiding opening 211 is located in the tube body 212, the outer wall of the tube body 212 is connected with the inner wall of the valve tube 10, the outer diameter of the annular rib 213 is smaller than that of the tube body 212, and the opening of the annular rib 213 forms the valve port 24.

By arranging the annular convex rib 213, the outer diameter of the annular convex rib 213 is smaller than that of the pipe body 212, and when the valve port 24 is closed, the sealing effect of the valve port 24 can be better improved. The other end of the pipe body 212 is connected with the mounting seat 22, and the connection mode can adopt brazing, so that the connection can be ensured to be more stable and reliable by using the brazing; the outer wall of the tube 212 is connected with the inner wall of the valve tube 10, and the connection mode can also adopt brazing, so that the valve tube is stable and reliable.

As shown in fig. 2, a buffer chamber 23 is formed in the guide tube 21 in a space between the escape port 211 and the occlusion end 12. Through setting up buffer chamber 23 in the space between second interface 14 and shutoff end 12, when valve port 24 was opened, the fluid flowed into second interface 14 and got into buffer chamber 23, can alleviate the kinetic energy of fluid to play the cushioning effect, let the fluid flow more steady.

Specifically, the outer wall of the valve core 30 is provided with external threads, the valve core 30 is internally provided with an operation part 31, the operation part 31 is positioned at one side of the valve core 30 away from the valve port 24, and the stop valve further comprises: the pressing block 40 is arranged in the cavity of the valve pipe 10, the outer wall of the pressing block 40 is fixedly connected with the inner wall of the valve pipe 10, the pressing block 40 is provided with internal threads, the internal threads are matched with the external threads, and the pressing block 40 is made of stainless steel. With the above arrangement, the valve body 30 can be moved up and down in the cavity of the valve tube 10, thereby opening or closing the valve port 24. Wherein, the operation part 31 has a hexagonal structure or a quadrilateral structure, which is convenient for the user to operate; the briquette 40 is made of stainless steel, thereby reducing the material cost.

The side of the pressing block 40 facing the valve port 24 is provided with an annular groove 41, the stop valve further comprises a first sealing gasket 51, the first sealing gasket 51 is sleeved on the valve core 30, and the first sealing gasket 51 is matched with the peripheral edge of the annular groove 41 in a blocking mode. By arranging the annular groove 41 in the pressing block 40, a part of the first sealing gasket 51 can be embedded into the annular groove 41, when the valve port 24 is opened, one end of the valve core 30 moves towards the annular groove 41, and the periphery of the annular groove 41 can play a limiting role on the first sealing gasket 51 to prevent the valve core 30 from falling out; and the valve core 30 is in sealing fit with the valve tube 10, so that leakage of fluid can be prevented.

Specifically, the side wall of the valve core 30 is provided with a first annular groove 32 and a second annular groove 33, the stop valve further comprises a sealing piece 52 and a second sealing gasket 53, the sealing piece 52 is positioned in the first annular groove 32, the sealing piece 52 is in sealing fit with the inner wall of the valve tube 10, and the second sealing gasket 53 is positioned in the second annular groove 33; when the valve port 24 is closed, the second gasket 53 abuts against the peripheral edge of the valve port 24.

In the scheme, the sealing piece 52 is abutted with the inner wall of the first annular groove 32, and the sealing piece 52 is in sealing fit with the inner wall of the valve tube 10, so that the sealing performance of the valve core 30 and the valve tube 10 is improved; the second gasket 53 abuts against the inner wall of the second annular groove 33, improving the sealability of the valve cartridge 30 and the valve tube 10. Wherein the second annular groove 33 can be understood as an annular step. When the valve port 24 is closed, the second sealing gasket 53 can be abutted against the periphery of the valve port 24, so that soft sealing between the valve core 30 and the valve port 24 is realized, and the operation intensity of a user is effectively reduced.

The valve core 30 comprises a first rod section 34, a second rod section 35 and a third rod section 36 which are sequentially connected, the diameter of the second rod section 35 is larger than that of the first rod section 34 and the diameter of the third rod section 36, the diameter of the third rod section 36 is smaller than that of the valve port 24, the two ends of the second rod section 35 are respectively provided with a first annular groove 32 and a second annular groove 33, wherein an opening of the first annular groove 32 faces the inner wall of the valve pipe 10, and an opening of the second annular groove 33 faces the guide pipe 21.

With the above arrangement, the diameter of the third stem section 36 is set to be smaller than the diameter of the valve port 24, so as to be convenient for cooperation with the valve port 24; the diameter of the second rod section 35 is set to be larger than the diameters of the first rod section 34 and the third rod section 36, and when the valve port 24 is closed, one end of the guide tube 21 can act as a stop for the valve core 30, so that the movement range of the valve core 30 is limited. In this embodiment, the opening diameter of the second annular groove 33 is smaller than the inner diameter, so that the second gasket 53 can be better inserted, and the sealing performance of the valve port 24 can be improved.

As shown in fig. 1, the shut-off valve further includes: the first connecting pipe 541, one end of the first connecting pipe 541 is connected with the first interface 13, and the first connecting pipe 541 is made of stainless steel; the second connection pipe 542, one end of the second connection pipe 542 is connected with the second interface 14, the second connection pipe 542 is parallel to the first connection pipe 541, and the second connection pipe 542 is made of stainless steel; the third connecting pipe 551 is sleeved at one end of the first connecting pipe 541 away from the first interface 13; the fourth connecting tube 552 is sleeved at one end of the second connecting tube 542 away from the second interface 14.

By adopting the arrangement mode, the connecting pipe is convenient to communicate with an external connecting pipe; the first connecting pipe 541 and the second connecting pipe 542 are respectively connected with the first interface 13 and the second interface 14, and the connection mode can adopt brazing, so that the connection is stable and firm; the first connection pipe 541 and the second connection pipe 542 are respectively communicated with the first port 13 and the second port 14, and fluid communication can be realized. Wherein, set up the material of first takeover 541 and second takeover 542 as the stainless steel, reduced material cost. The third connecting pipe 551 and the fourth connecting pipe 552 are respectively sleeved at one ends of the first connecting pipe 541 and the second connecting pipe 542, so that the connection with the external connecting pipe is facilitated, and the convenience of the stop valve is improved. The third connecting tube 551 and the fourth connecting tube 552 are made of red copper, so that the user can conveniently connect with external connecting tubes.

Specifically, the side wall of the valve tube 10 is also provided with a vent port 56, the vent port 56 is communicated with the cavity of the valve tube 10, the stop valve further comprises a valve structure 57, and the valve structure 57 is connected with the vent port 56. By providing the valve structure 57 in communication with the cavity of the valve tube 10, inflation and deflation can be performed as needed, and the tightness of the air pressure in the shut-off valve can be maintained, ensuring the stability during operation. Wherein, the valve structure 57 can be made of stainless steel, thereby reducing the material cost.

Wherein the valve structure 57 includes: the pipe body, valve core and tube cap, the one end of pipe body is connected with the air vent 56, and the valve core sets up in the pipe body, and the tube cap is used for covering the other end of pipe body. Wherein, one end of the tube body is connected with the air vent 56, and the connection mode can adopt brazing, thereby being stable and reliable.

Optionally, the stop valve further includes a first cap covering the operation end 11 of the valve tube 10, a second cap covering one end of the third connection tube 551, and a third cap covering one end of the fourth connection tube 552. By arranging the first valve cover, one end of the valve tube 10 can be covered, the valve tube 10 is prevented from being interfered by the outside, and the safety and the stability of the valve tube during working are ensured; the second valve cover and the third valve cover are respectively used for covering one ends of the third connecting pipe 551 and the fourth connecting pipe 552, so as to prevent the inner cavities of the third connecting pipe 551 and the fourth connecting pipe 552 from being disturbed by the outside. Wherein, first valve gap, second valve gap and third valve gap can be stainless steel or plastics material, have reduced the material cost.

Alternatively, the mounting seat 22 has two through holes, and the two through holes are disposed in parallel on the mounting seat 22. Through setting up two through-holes, be convenient for with external structure installation.

Another embodiment of the present invention provides a machining method for machining the stop valve, including: a plurality of flanging openings are formed in the side wall of the stainless steel pipe by flanging to process a valve pipe 10 of the stop valve; machining the stainless steel rod to form the valve seat 20 of the stop valve; cold heading and cutting are carried out on the stainless steel rod to process a valve core 30 of the stop valve; the stainless steel rod or tube is cut to manufacture the press block 40 of the shut-off valve. Wherein the plurality of cuff openings includes a first port 13, a second port 14, and a vent opening 56.

By adopting the processing method, the existing stainless steel tube, stainless steel rod and stainless steel plate can be adopted for part processing, and the processing difficulty and the material cost are reduced. The stainless steel pipe is subjected to flanging by utilizing a flanging machine, so that a valve pipe 10 of the stop valve can be machined; the valve core 30 can be obtained by cold heading and cutting the stainless steel rod; the valve seat 20 and the pressing block 40 are obtained by cutting a stainless steel rod.

And, the processing method also comprises: the first connection tube 541 and the second connection tube 542 are obtained by cutting a stainless steel tube; the third connection pipe 551 and the fourth connection pipe 552 are obtained by cutting copper pipes; the valve structure 57 is obtained by cutting a stainless steel rod.

Another embodiment of the present invention provides an assembling method for assembling the above-mentioned shut-off valve, the assembling method comprising: s1: pressing the guide tube 21 of the valve seat 20 of the stop valve into the valve tube 10 of the stop valve, and correspondingly pressing the first connecting tube 541, the second connecting tube 542 and the valve mouth of the stop valve into the first port 13, the second port 14 and the air port 56 of the valve tube 10; s2: brazing the assembled structure in the S1 in a whole furnace; s3: the first sealing gasket 51, the second sealing gasket 53 and the sealing piece 52 of the stop valve are sleeved on the valve core 30 of the stop valve; s4: the structure integrated in the S3 is installed in the valve pipe 10; s5: the pressing block 40 of the shut-off valve is pressed into the valve tube 10, and then the pressing block 40 and the valve tube 10 are connected by laser welding or argon arc welding.

By adopting the assembly method, the guide pipe 21, the first connecting pipe 541, the second connecting pipe 542 and the valve structure 57 are respectively pressed into corresponding positions, and the assembled structure can be brazed in the integral furnace, so that the assembly is more convenient, and the connection is firm; then the first sealing gasket 51, the second sealing gasket 53 and the sealing piece 52 are sleeved on the valve core 30 of the stop valve and are arranged in the valve pipe 10; the pressing block 40 is pressed into the valve pipe 10, and the pressing block 40 is connected with the valve pipe 10 by laser welding or argon arc welding, so that the connection is more stable and firm. Wherein the welding environment temperature is 1020-1040 ℃. The assembly method further comprises the following steps: the assembled stop valve is subjected to water detection tightness test, so that tightness of the stop valve is ensured; and drying the stop valve.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A shut-off valve, comprising:

the valve tube (10), both ends of the valve tube (10) are an operation end (11) and a plugging end (12) respectively, a first interface (13) and a second interface (14) are arranged on the side wall of the valve tube (10), the first interface (13) and the second interface (14) are communicated with the cavity of the valve tube (10), and the second interface (14) is close to the plugging end (12) relative to the first interface (13);

the valve seat (20), the valve seat (20) is of an integral structure, the valve seat (20) comprises a guide pipe (21) and a mounting seat (22) which are connected with each other, the guide pipe (21) penetrates into a cavity of the valve pipe (10), the mounting seat (22) is used for blocking an opening of the blocking end (12), an avoidance opening (211) is formed in the side wall of the guide pipe (21), the avoidance opening (211) is communicated with the second interface (14), a valve port (24) is formed in an opening at the end part of the guide pipe (21), and the valve port (24) is located between the first interface (13) and the second interface (14);

a valve core (30) movably arranged in the cavity of the valve tube (10) to close or open the valve port (24);

wherein, the valve tube (10) and the valve seat (20) are made of stainless steel.

2. A shut-off valve according to claim 1, characterized in that the size of the mounting seat (22) is larger than the outer diameter of the valve tube (10) in the radial direction of the valve tube (10); the flow area of the avoidance port (211) is not smaller than the flow area of the second port (14).

3. The stop valve according to claim 1, wherein the guide tube (21) comprises a tube body (212) and an annular rib (213) arranged at one end of the tube body (212), the other end of the tube body (212) is connected with the mounting seat (22), the avoidance port (211) is positioned on the tube body (212), the outer wall of the tube body (212) is connected with the inner wall of the valve tube (10), the outer diameter of the annular rib (213) is smaller than the outer diameter of the tube body (212), and the opening of the annular rib (213) forms the valve port (24).

4. A shut-off valve according to claim 1, characterized in that the space in the guide tube (21) between the relief opening (211) and the plugging end (12) forms a buffer chamber (23).

5. The shut-off valve according to claim 1, wherein the valve core (30) has external threads on an outer wall thereof, the valve core (30) has an operating portion (31) therein, the operating portion (31) being located on a side of the valve core (30) facing away from the valve port (24), the shut-off valve further comprising:

the pressing block (40) is arranged in the cavity of the valve pipe (10), the outer wall of the pressing block (40) is fixedly connected with the inner wall of the valve pipe (10), the pressing block (40) is provided with internal threads, the internal threads are matched with the external threads, and the pressing block (40) is made of stainless steel.

6. The shut-off valve according to claim 5, wherein the pressure block (40) has an annular groove (41) on the side facing the valve port (24), the shut-off valve further comprising a first gasket (51), the first gasket (51) being fitted over the valve core (30), the first gasket (51) being in engagement with a peripheral stop of the annular groove (41).

7. The shut-off valve according to claim 1, wherein the side wall of the valve cartridge (30) has a first annular groove (32) and a second annular groove (33), the shut-off valve further comprising a seal (52) and a second gasket (53), the seal (52) being located within the first annular groove (32), the seal (52) being in sealing engagement with the inner wall of the valve tube (10), the second gasket (53) being located within the second annular groove (33); wherein, when the valve port (24) is closed, the second gasket (53) is abutted against the periphery of the valve port (24).

8. The shut-off valve according to claim 7, characterized in that the valve cartridge (30) comprises a first rod section (34), a second rod section (35) and a third rod section (36) connected in sequence, the diameter of the second rod section (35) is larger than the diameter of the first rod section (34) and the diameter of the third rod section (36), the diameter of the third rod section (36) is smaller than the diameter of the valve port (24), both ends of the second rod section (35) are respectively provided with the first annular groove (32) and the second annular groove (33), wherein the opening of the first annular groove (32) is directed towards the inner wall of the valve tube (10), and the opening of the second annular groove (33) is directed towards the guide tube (21).

9. The shut-off valve of claim 1, further comprising:

one end of the first connecting pipe (541) is connected with the first interface (13), and the first connecting pipe (541) is made of stainless steel;

the second connecting pipe (542), one end of the second connecting pipe (542) is connected with the second interface (14), the second connecting pipe (542) is arranged in parallel with the first connecting pipe (541), and the second connecting pipe (542) is made of stainless steel;

the third connecting pipe (551) is sleeved at one end of the first connecting pipe (541) far away from the first interface (13);

and the fourth connecting pipe (552) is sleeved at one end of the second connecting pipe (542) far away from the second interface (14).

10. The shut-off valve according to claim 1, characterized in that the valve tube (10) further has a vent (56) on its side wall, the vent (56) being in communication with the cavity of the valve tube (10), the shut-off valve further comprising a valve structure (57), the valve structure (57) being connected to the vent (56).

11. A processing method for processing the stop valve according to any one of claims 1 to 10, characterized in that the processing method comprises:

turning a plurality of flanging openings on the side wall of the stainless steel pipe by using a flanging machine to process a valve pipe (10) of the stop valve;

machining the stainless steel rod to form a valve seat (20) of the stop valve;

cold heading and cutting are carried out on the stainless steel rod to process a valve core (30) of the stop valve;

the stainless steel rod or tube is cut to manufacture a briquette (40) of the shut-off valve.

12. A method of assembling the shut-off valve of any one of claims 1 to 10, comprising:

s1: pressing a guide pipe (21) of a valve seat (20) of the stop valve into a valve pipe (10) of the stop valve, and correspondingly pressing a first connecting pipe (541), a second connecting pipe (542) and a valve mouth of the stop valve into a first interface (13), a second interface (14) and a vent (56) of the valve pipe (10);

s2: brazing the assembled structure in the S1 in a whole furnace;

s3: a first sealing gasket (51), a second sealing gasket (53) and a sealing piece (52) of the stop valve are sleeved on a valve core (30) of the stop valve;

s4: integrally installing the structure assembled in the step S3 into the valve pipe (10);

s5: pressing a pressing block (40) of the stop valve into the valve tube (10), and then connecting the pressing block (40) with the valve tube (10) by laser welding or argon arc welding.

Images