CN216742843U

CN216742843U - Stop valve

Info

Publication number: CN216742843U
Application number: CN202122941454.7U
Authority: CN
Inventors: 陈狄永; 寿杰; 冯光华; 陈玮能
Original assignee: Zhejiang Dunan Artificial Environment Co Ltd
Current assignee: Zhejiang Dunan Artificial Environment Co Ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-06-14
Anticipated expiration: 2031-11-23

Abstract

The utility model provides a stop valve, stop valve includes: the valve comprises a valve pipe, wherein two ends of the valve pipe are respectively an operating end and a plugging end, a first interface and a second interface are arranged on the side wall of the valve pipe, the first interface and the second interface are both communicated with a cavity of the valve pipe, the second interface is close to the plugging end relative to the first interface, and a buffer chamber is formed in a space between the second interface and the plugging end in the valve pipe; the base is connected with the plugging end to plug the opening of the plugging end; the lantern ring is fixed in the cavity of the valve pipe, the outer wall of the lantern ring is in sealing fit with the inner wall of the valve pipe, the lantern ring is positioned between the first port and the second port, and the lantern ring is provided with a valve port; the valve core is movably arranged in the cavity of the valve pipe so as to close or open the valve port, and is positioned on one side of the lantern ring facing the operating end; the valve pipe and the base are both made of stainless steel. Through the technical scheme provided by the utility model, can solve among the prior art stop valve fluid flow problem that is not steady, processing difficulty and with high costs.

Description

Stop valve

Technical Field

The utility model relates to a stop valve technical field particularly, relates to a stop valve.

Background

At present, the existing stop valve is generally composed of a valve body, a valve core and other structures, and the valve port is opened or closed by the up-and-down movement of the valve core in the valve body. In the prior art, when a valve port is opened, fluid enters a valve body, the kinetic energy is high, the fluid flow is not stable, and the valve body is difficult to actually process and integrally assemble the stop valve due to the complex integral structure of the valve body, so that the processing cost is increased; the valve body and the valve core are usually made of brass, and the cost of the brass is high.

SUMMERY OF THE UTILITY MODEL

The utility model provides a stop valve to solve the stop valve fluid among the prior art and flow not steady, processing difficulty and problem with high costs.

In order to solve the above problem, the utility model provides a stop valve, include: the valve comprises a valve pipe, wherein two ends of the valve pipe are respectively an operating end and a plugging end, a first interface and a second interface are arranged on the side wall of the valve pipe, the first interface and the second interface are both communicated with a cavity of the valve pipe, the second interface is close to the plugging end relative to the first interface, and a buffer chamber is formed in a space between the second interface and the plugging end in the valve pipe; the base is connected with the plugging end to plug the opening of the plugging end; the lantern ring is fixed in the cavity of the valve pipe, the outer wall of the lantern ring is in sealing fit with the inner wall of the valve pipe, the lantern ring is positioned between the first port and the second port, and the lantern ring is provided with a valve port; the valve core is movably arranged in the cavity of the valve pipe so as to close or open the valve port, and is positioned on one side of the lantern ring facing the operating end; wherein, valve pipe and base are stainless steel.

Further, the outer wall of case has the external screw thread, has the operating portion in the case, and the operating portion is established in the one end that deviates from the valve port, and the stop valve still includes: the briquetting sets up in the cavity of valve pipe, the outer wall of briquetting and the inner wall fixed connection of valve pipe, and the briquetting has the internal thread, internal thread and thread fit.

Further, the lantern ring is made of stainless steel, and/or the valve core is made of stainless steel, and/or the pressing block is made of stainless steel.

Furthermore, 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 the periphery of the annular groove in a stopping mode.

Furthermore, the side wall of the valve core is provided with a first annular groove and a second annular groove, the stop valve also comprises a sealing element and a second sealing gasket, the sealing element is positioned in the first annular groove, the sealing element is in sealing fit with the inner wall of the valve pipe, and the second sealing gasket is positioned in the second annular groove; when the valve port is closed, the second sealing gasket is abutted with the periphery of the valve port.

Further, the valve core comprises a first rod section, a second rod section and a third rod section which are connected in sequence, the diameter of the second rod section is larger than that of the first rod section and that of the third rod section, the diameter of the third rod section is smaller than that of the valve port, a first annular groove and a second annular groove are formed in two ends of the second rod section respectively, the opening of the first annular groove faces the inner wall of the valve pipe, and the opening of the second annular groove faces the lantern ring.

Furthermore, the lantern ring comprises a sleeve body and an annular convex rib arranged at one end of the sleeve body, the outer wall of the sleeve body is connected with the inner wall of the valve pipe, the outer diameter of the annular convex rib is smaller than that of the sleeve body, and an opening of the annular convex rib forms a valve port; wherein, under the condition that the valve port is closed, the second sealing gasket is abutted with the annular convex rib.

Further, the stop valve still includes: one end of the first connecting pipe is connected with the first interface, and the first connecting pipe is made of stainless steel; and one end of the second connecting pipe is connected with the second interface, the second connecting pipe and the first connecting pipe are arranged in parallel, and the second connecting pipe is made of stainless steel.

Further, the stop valve still includes: the third connecting pipe is sleeved at one end of the first connecting pipe, which is far away from the first interface; and the fourth connecting pipe is sleeved at one end of the second connecting pipe, which is far away from the second interface.

Furthermore, the stop valve also comprises a first valve cover, a second valve cover and a third valve cover, wherein the first valve cover covers the operation end of the valve pipe, the second valve cover covers one end of the third connecting pipe, and the third valve cover covers one end of the fourth connecting pipe.

Further, still have the blow vent on the lateral wall of valve pipe, the cavity intercommunication of blow vent and valve pipe, the stop valve still includes the valve structure, and the valve structure is connected with the blow vent.

Use the technical scheme of the utility model, a stop valve is provided, include: the valve comprises a valve pipe, wherein two ends of the valve pipe are respectively an operating end and a plugging end, a first interface and a second interface are arranged on the side wall of the valve pipe, the first interface and the second interface are both communicated with a cavity of the valve pipe, the second interface is close to the plugging end relative to the first interface, and a buffer chamber is formed in a space between the second interface and the plugging end in the valve pipe; the base is connected with the plugging end to plug the opening of the plugging end; the lantern ring is fixed in the cavity of the valve pipe, the outer wall of the lantern ring is in sealing fit with the inner wall of the valve pipe, the lantern ring is positioned between the first port and the second port, and the lantern ring is provided with a valve port; the valve core is movably arranged in the cavity of the valve pipe so as to close or open the valve port, and is positioned on one side of the lantern ring facing the operating end; wherein, valve pipe and base are stainless steel material. By adopting the scheme, the buffer chamber is arranged in the space between the second connector and the plugging end, when the valve port is opened, fluid flows into the valve pipe and then enters the buffer chamber, so that the kinetic energy of the fluid can be relieved, the buffer effect is achieved, and the fluid flows more stably; the stop valve is easier to process and assemble integrally by arranging the base and connecting the valve pipe, the connecting mode can adopt brazing, and the connection can be more stable and reliable by using brazing; the valve pipe and the base are made of stainless steel, so that the production cost is reduced. In the scheme, the valve core moves up and down in the cavity of the valve pipe, so that the first interface and the second interface can be communicated or disconnected, namely the valve port is opened or closed; set up the lantern ring and be connected with the cavity of valve pipe, reduced the processing degree of difficulty, this connected mode can adopt to braze, uses to braze and can guarantee to connect more stably, reliably, and the outer wall of the lantern ring can with the sealed cooperation of the inner wall of valve pipe, improved the leakproofness of valve mouth department.

Drawings

The accompanying drawings, which form a part of the present application, 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 and not to limit the invention. In the drawings:

figure 1 shows a cross-sectional view of a shut-off valve provided by an embodiment of the present invention when open;

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

FIG. 3 shows a cross-sectional view of the collar of FIG. 1;

FIG. 4 shows a cross-sectional view of the compact of FIG. 1;

FIG. 5 shows an exploded view of the shut-off valve of FIG. 1;

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.

Wherein the 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; 15. a buffer chamber; 16. a vent;

20. a base;

30. a collar; 31. a valve port; 32. a sleeve body; 33. an annular convex rib;

40. a valve core; 41. an external thread; 42. an operation section; 43. a first annular groove; 44. a second annular groove; 45. a first pole segment; 46. a second pole segment; 47. a third pole segment;

50. briquetting; 51. an internal thread; 52. an annular groove;

61. a first gasket; 62. a seal member; 63. a second gasket; 641. a first adapter tube; 642. a second connection pipe; 651. a third connection pipe; 652. a fourth connecting pipe; 661. a first valve cover; 662. a second valve cover; 663. a third valve cover; 67. a valve structure.

Detailed Description

The technical solution 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 is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 7, an embodiment of the present invention provides a stop valve, including: the valve comprises a valve tube 10, wherein two ends of the valve tube 10 are respectively an operating end 11 and a blocking end 12, the side wall of the valve tube 10 is provided with a first interface 13 and a second interface 14, the first interface 13 and the second interface 14 are both communicated with a cavity of the valve tube 10, the second interface 14 is close to the blocking end 12 relative to the first interface 13, and a buffer chamber 15 is formed in a space between the second interface 14 and the blocking end 12 in the valve tube 10; a base 20 connected to the plugging end 12 for plugging the opening of the plugging end 12; the lantern ring 30 is fixed in the cavity of the valve pipe 10, the outer wall of the lantern ring 30 is in sealing fit with the inner wall of the valve pipe 10, the lantern ring 30 is positioned between the first port 13 and the second port 14, and the lantern ring 30 is provided with a valve port 31; a valve core 40 movably arranged in the cavity of the valve tube 10 to close or open the valve port 31, wherein the valve core 40 is positioned on one side of the collar 30 facing the operation end 11; wherein, the valve tube 10 and the base 20 are made of stainless steel.

By adopting the scheme, the buffer chamber 15 is arranged in the space between the second connector 14 and the blocking end 12, when the valve port 31 is opened, fluid flows into the second connector 14 and enters the buffer chamber 15, so that the kinetic energy of the fluid can be relieved, a buffering effect is achieved, and the fluid flows more stably; the connection of the base 20 and the valve pipe 10 is arranged, so that the stop valve is easier to process and assemble integrally, the connection mode can adopt brazing, and the connection can be more stable and reliable by using brazing; the valve tube 10 and the base 20 are made of stainless steel, so that the production cost is reduced. In the scheme, the valve core 40 moves up and down in the cavity of the valve tube 10, so that the first port 13 and the second port 14 can be communicated or disconnected, namely the valve port 31 is opened or closed; the cavity that sets up lantern ring 30 and valve pipe 10 is connected, has reduced the processing degree of difficulty, and this connected mode can adopt to braze, uses to braze and can guarantee to connect more stably, reliable, and the outer wall of lantern ring 30 can be with the sealed cooperation of the inner wall of valve pipe 10, has improved the leakproofness of valve port 31 department.

Alternatively, the first port 13 and the second port 14 on the sidewall of the valve tube 10 can be machined in a flanging manner, which is easier to machine.

Wherein, the outer wall of valve core 40 has external screw thread 41, has operation portion 42 in the valve core 40, and the opening of operation portion 42 deviates from valve port 31, and the stop valve still includes: the pressing block 50 is arranged in the cavity of the valve pipe 10, the outer wall of the pressing block 50 is fixedly connected with the inner wall of the valve pipe 10, the pressing block 50 is provided with an internal thread 51, and the internal thread 51 is matched with the external thread 41. With the above arrangement, the valve core 40 can move up and down in the cavity of the valve tube 10, thereby opening or closing the valve port 31. The operation portion 42 has a hexagonal structure or a quadrangular structure, which is convenient for a user to operate.

In this embodiment, the collar 30 is made of stainless steel, and/or the valve core 40 is made of stainless steel, and/or the pressure block 50 is made of stainless steel. The lantern ring 30, the valve core 40 and the pressing block 50 are all made of stainless steel, so that the production cost is reduced.

Furthermore, the side of the pressure block 50 facing the valve port 31 is provided with an annular groove 52, the stop valve further comprises a first sealing gasket 61, the first sealing gasket 61 is sleeved on the valve core 40, and the first sealing gasket 61 is in stop fit with the periphery of the annular groove 52. By arranging the annular groove 52 in the pressing block 50, a part of the first sealing gasket 61 can be embedded into the annular groove 52, when the valve port 31 is opened, one end of the valve core 40 moves towards the annular groove 52, and the periphery of the annular groove 52 can limit the first sealing gasket 61 to prevent the valve core 40 from being removed; and the valve core 40 is in sealing fit with the valve tube 10, which can prevent fluid leakage.

Specifically, the side wall of the valve core 40 has a first annular groove 43 and a second annular groove 44, the stop valve further comprises a sealing member 62 and a second sealing gasket 63, the sealing member 62 is positioned in the first annular groove 43, the sealing member 62 is in sealing fit with the inner wall of the valve pipe 10, and the second sealing gasket 63 is positioned in the second annular groove 44; when the valve port 31 is closed, the second gasket 63 abuts against the peripheral edge of the valve port 31.

In the scheme, the sealing element 62 is abutted against the inner wall of the first annular groove 43, and the sealing element 62 is in sealing fit with the inner wall of the valve pipe 10, so that the sealing performance of the valve core 40 and the valve pipe 10 is improved; the second gasket 63 abuts against the inner wall of the second annular groove 44, and improves the sealing performance between the valve body 40 and the valve tube 10. The second annular groove 44 can be understood to be an annular step. When the valve port 31 is closed, the second gasket 63 can abut against the periphery of the valve port 31, so that the soft seal between the valve core 40 and the valve port 31 is realized, and the operation intensity of a user is effectively reduced. In this embodiment, the seal is a gasket. Wherein, the sealing element can also be a combined sealing element.

The valve core 40 includes a first rod section 45, a second rod section 46 and a third rod section 47 which are connected in sequence, the diameter of the second rod section 46 is larger than the diameters of the first rod section 45 and the third rod section 47, the diameter of the third rod section 47 is smaller than the diameter of the valve port 31, a first annular groove 43 and a second annular groove 44 are respectively arranged at two ends of the second rod section 46, wherein the opening of the first annular groove 43 faces the inner wall of the valve pipe 10, and the opening of the second annular groove 44 faces the collar 30. With the above arrangement, the diameter of the third rod section 47 is set to be smaller than that of the valve port 31, so as to be convenient for matching with the valve port 31; by providing the second rod segment 46 with a diameter larger than the diameters of the first and

third rod segments

45, 47, the collar 30 can act as a stop for the valve core 40 when the valve port 31 is closed, thereby limiting the range of movement of the valve core 40. In this embodiment, the opening diameter of the second annular groove 44 is smaller than the inner diameter, so that the second gasket 63 can be better inserted, and the sealing performance of the valve port 31 can be improved.

As shown in fig. 3, the sleeve 30 includes a sleeve body 32 and an annular rib 33 disposed at one end of the sleeve body 32, an outer wall of the sleeve body 32 is connected to an inner wall of the valve tube 10, an outer diameter of the annular rib 33 is smaller than an outer diameter of the sleeve body 32, and an opening of the annular rib 33 forms the valve port 31; when the valve port 31 is closed, the second gasket 63 abuts against the annular rib 33. Through setting up annular protruding muscle 33, can promote the sealed effect of valve port 31 better. When the valve port 31 is closed, the annular rib 33 can abut against the second gasket 63, so that soft sealing between the valve core 40 and the valve port 31 is realized, and the operation intensity of a user is effectively reduced.

As shown in fig. 5, the shut-off valve further includes: one end of the first connection pipe 641 is connected to the first connector 13, and the first connection pipe 641 is made of stainless steel; one end of the second connection tube 642 is connected to the second port 14, the second connection tube 642 is parallel to the first connection tube 641, and the second connection tube 642 is made of stainless steel. By adopting the arrangement mode, the connection with the external connecting pipe is convenient; the first connecting pipe 641 and the second connecting pipe 642 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 641 and the second connection pipe 642 are respectively communicated with the first port 13 and the second port 14, and can realize fluid communication. The first connection pipe 641 and the second connection pipe 642 are made of stainless steel, so that the material cost is reduced.

Wherein, the stop valve still includes: the third connecting pipe 651 is sleeved at one end, far away from the first interface 13, of the first connecting pipe 641; and the fourth connecting pipe 652 is sleeved at one end of the second connecting pipe 642 far away from the second interface 14. The third connection pipe 651 and the fourth connection pipe 652 are respectively sleeved at one end of the first connection pipe 641 and one end of the second connection pipe 642, so that the connection with the external connection pipe is facilitated, and the convenience of the stop valve is improved. The third connecting pipe 651 and the fourth connecting pipe 652 are made of red copper, so that a user can connect an external connecting pipe conveniently.

Further, the stop valve further includes a first cap 661, a second cap 662 and a third cap 663, the first cap 661 covers the operation end 11 of the valve pipe 10, the second cap 662 covers one end of the third connection pipe 651, and the third cap 663 covers one end of the fourth connection pipe 652. The first valve cover 661 is arranged to cover one end of the valve pipe 10, so as to prevent the valve pipe 10 from being interfered by the outside and ensure the safety and stability during operation; the second valve cover 662 and the third valve cover 663 are respectively used for covering one end of the third connecting pipe 651 and one end of the fourth connecting pipe 652, and preventing the inner cavities of the third connecting pipe 651 and the fourth connecting pipe 652 from being interfered by the outside. The first valve cover 661, the second valve cover 662 and the third valve cover 663 can be made of stainless steel or plastic, so that the material cost is reduced.

Specifically, the side wall of the valve tube 10 is also provided with an air vent 16, the air vent 16 is communicated with the cavity of the valve tube 10, and the stop valve further comprises a valve structure 67, and the valve structure 67 is connected with the air vent 16. Through setting up the cavity intercommunication of valve structure 67 and valve pipe 10, can fill the gassing when needing to can maintain the leakproofness of the atmospheric pressure in the stop valve, guarantee the stability of during operation. Wherein, valve structure 67 can be stainless steel material, reduces material cost.

Wherein, valve structure 67 includes: the valve comprises a tube body, a valve core and a tube cap, wherein one end of the tube body is connected with the air vent 16, the valve core is arranged in the tube body, and the tube cap is used for covering the other end of the tube body. Wherein, the one end and the blow vent 16 of body are connected, and the connected mode can adopt the brazing, and is stable, reliable.

Alternatively, the base 20 comprises a bottom plate and a flap perpendicular to each other, the bottom plate being welded to the closed end 12 of the valve tube 10, the flap having a through hole. The bottom plate is connected with the plugging end 12 of the valve pipe 10 in a welding mode, so that the valve pipe is stable and reliable; through setting up the through-hole, be convenient for with external structure installation.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A shut-off valve, comprising:

the valve comprises a valve tube (10), wherein two ends of the valve tube (10) are respectively an operating end (11) and a blocking end (12), a side wall of the valve tube (10) is provided with a first interface (13) and a second interface (14), the first interface (13) and the second interface (14) are both communicated with a cavity of the valve tube (10), the second interface (14) is close to the blocking end (12) relative to the first interface (13), and a buffer chamber (15) is formed in the valve tube (10) in a space between the second interface (14) and the blocking end (12);

a base (20) connected to the plugging end (12) to plug the opening of the plugging end (12);

a collar (30) fixed in the cavity of the valve tube (10), wherein the outer wall of the collar (30) is in sealing fit with the inner wall of the valve tube (10), the collar (30) is positioned between the first port (13) and the second port (14), and the collar (30) is provided with a valve port (31);

a valve core (40) movably arranged in the cavity of the valve pipe (10) to close or open the valve port (31), wherein the valve core (40) is positioned on one side of the collar (30) facing the operation end (11);

wherein, the valve pipe (10) and the base (20) are both made of stainless steel materials.

2. A shut-off valve according to claim 1, wherein the valve spool (40) has an external thread (41) on its outer wall, and the valve spool (40) has an operating portion (42) therein, the operating portion (42) being provided at an end facing away from the valve port (31), the shut-off valve further comprising:

briquetting (50), set up in the cavity of valve pipe (10), the outer wall of briquetting (50) with the inner wall fixed connection of valve pipe (10), briquetting (50) have internal thread (51), internal thread (51) with external screw thread (41) cooperation.

3. The shut-off valve according to claim 2, characterized in that the collar (30) is of stainless steel material and/or the valve spool (40) is of stainless steel material and/or the pressure piece (50) is of stainless steel material.

4. A shut-off valve according to claim 2, characterized in that the pressure piece (50) has an annular groove (52) on the side facing the valve port (31), and in that the shut-off valve further comprises a first sealing gasket (61), the first sealing gasket (61) being fitted over the valve element (40), the first sealing gasket (61) cooperating with a peripheral stop of the annular groove (52).

5. The shut-off valve of claim 1, wherein the side wall of the valve spool (40) has a first annular groove (43) and a second annular groove (44), the shut-off valve further comprising a seal (62) and a second gasket (63), the seal (62) being located in the first annular groove (43), the seal (62) being in sealing engagement with the inner wall of the valve tube (10), the second gasket (63) being located in the second annular groove (44); wherein, when the valve port (31) is closed, the second gasket (63) abuts against the periphery of the valve port (31).

6. The shut-off valve according to claim 5, characterized in that the valve core (40) comprises a first rod section (45), a second rod section (46) and a third rod section (47) which are connected in sequence, the diameter of the second rod section (46) is larger than that of the first rod section (45) and that of the third rod section (47), the diameter of the third rod section (47) is smaller than that of the valve port (31), the two ends of the second rod section (46) are respectively provided with the first annular groove (43) and the second annular groove (44), wherein the first annular groove (43) is opened towards the inner wall of the valve pipe (10), and the second annular groove (44) is opened towards the collar (30).

7. The stop valve according to claim 5, wherein the collar (30) comprises a sleeve body (32) and an annular rib (33) arranged at one end of the sleeve body (32), the outer wall of the sleeve body (32) is connected with the inner wall of the valve tube (10), the outer diameter of the annular rib (33) is smaller than that of the sleeve body (32), and the opening of the annular rib (33) forms the valve port (31); wherein, when the valve port (31) is closed, the second gasket (63) is abutted against the annular rib (33).

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

a first connection pipe (641), wherein one end of the first connection pipe (641) is connected with the first interface (13), and the first connection pipe (641) is made of stainless steel;

one end of the second connecting pipe (642) is connected with the second interface (14), the second connecting pipe (642) is arranged in parallel with the first connecting pipe (641), and the second connecting pipe (642) is made of stainless steel.

9. The shut-off valve of claim 8, further comprising:

the third connecting pipe (651) is sleeved at one end, far away from the first interface (13), of the first connecting pipe (641);

a fourth connecting pipe (652), wherein the fourth connecting pipe (652) is sleeved at one end of the second connecting pipe (642) far away from the second interface (14).

10. The shut-off valve according to claim 9, further comprising a first valve cover (661), a second valve cover (662) and a third valve cover (663), the first valve cover (661) covering the operational end (11) of the valve pipe (10), the second valve cover (662) covering one end of the third adapter pipe (651), the third valve cover (663) covering one end of the fourth adapter pipe (652).

11. The stop valve according to claim 1, characterized in that the valve tube (10) further has a vent opening (16) in the side wall, the vent opening (16) communicates with the cavity of the valve tube (10), and the stop valve further comprises a valve structure (67), and the valve structure (67) is connected with the vent opening (16).