阅读说明：本技术 一种波纹管阀门 (Corrugated pipe valve ) 是由 蒋宇峰 余祖耀 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种波纹管阀门,本发明包括安装在密封盖顶部且位于支撑架内、用于压紧填料的一对调节装置,调节装置分别位于阀杆左右两侧且关于阀杆左右对称,下端安装在阀杆上且上端安装在密封盖上、位于阀盖内的波纹管组件。通过辅助环A、辅助环B以及导向斜面A、导向斜面B的设置,增加波纹管接口处的面积,提高热容量,从而增加焊接面积,提高波纹管接口处的强度,同时利用第一波纹管、第二波纹管共同承压,承压能力大大提高。通过调节装置解决了现有填料易滑动,阀杆密封效果不好的问题；通过平移架、滚轮、平移块A、平移块B之间形成楔块结构,转动调节杆,带动平移块A、平移块B向下运动,压杆、压板向下压紧填料。(The invention discloses a corrugated pipe valve which comprises a pair of adjusting devices, wherein the adjusting devices are arranged at the top of a sealing cover, are positioned in a supporting frame and are used for compressing packing, are respectively positioned on the left side and the right side of a valve rod and are bilaterally symmetrical relative to the valve rod, the lower ends of the adjusting devices are arranged on the valve rod, the upper ends of the adjusting devices are arranged on the sealing cover, and the corrugated pipe assembly is positioned in a valve cover. Through the setting of supplementary ring A, supplementary ring B and direction inclined plane A, direction inclined plane B, increase the area at bellows kneck, improve thermal capacity to increase welding area, improve the intensity at bellows kneck, utilize first bellows, the common pressure-bearing of second bellows simultaneously, the bearing capacity improves greatly. The problems that the existing filler is easy to slide and the sealing effect of the valve rod is poor are solved through the adjusting device; a wedge block structure is formed among the translation frame, the rolling wheels, the translation block A and the translation block B, the adjusting rod is rotated to drive the translation block A and the translation block B to move downwards, and the pressing rod and the pressing plate press the filler downwards.)

1. A corrugated pipe valve is characterized by comprising a valve body (1) internally provided with a flow cavity (2), wherein the flow cavity (2) is parallel to the X direction, a valve cover (3) arranged at the top of the valve body (1) through a bolt is arranged, a central hole A (4) communicated with the flow cavity (2) is arranged on the valve cover (3), a sealing cover (5) arranged at the top of the valve cover (3) through a bolt is provided with a central hole B communicated with the central hole A (4), the top of the sealing cover (5) is provided with a central hole C (7) communicated with the central hole B, a valve rod (8) penetrating through the central hole A (4), the central hole B and the central hole C (7) is arranged at the bottom of the valve rod (8) and positioned in the flow cavity (2), a valve core (9) used for closing or opening the flow cavity (2), and a filler (10) positioned in the central hole C (7) and tightly abutted against the valve rod (8), the device comprises a support frame (52) arranged at the top of a sealing cover (5), a rotating ring (53) rotatably arranged at the top of the support frame (52) through a rolling bearing, a hand wheel (54) arranged at the top of the rotating ring (53) and positioned above the support frame (52), a valve rod (8) penetrates through the rotating ring (53) and is in threaded connection with the rotating ring (53), and a pair of adjusting devices (11) which are arranged at the top of the sealing cover (5) and positioned in the support frame (52) and used for compressing packing (10) are respectively positioned at the left side and the right side of the valve rod (8) and are bilaterally symmetrical relative to the valve rod (8), the lower end of each adjusting device is arranged on the valve rod (8), the upper end of each adjusting device is arranged on the sealing cover (5), and the lower end of each adjusting device is arranged on a corrugated pipe assembly (12) in the valve cover (3);

the corrugated pipe assembly (12) comprises a base (13) arranged on the valve rod (8), a top seat (14) arranged at the bottom of the sealing cover (5), and a multilayer corrugated pipe, wherein one end of the multilayer corrugated pipe is arranged on the base (13), and the other end of the multilayer corrugated pipe is arranged on the top seat (14).

2. A bellows valve according to claim 1, wherein the base (13) is coaxially disposed with the valve rod (8), the base (13) is provided with a bottom hole for the valve rod (8) to pass through, an auxiliary ring a (16) is installed on the top of the base (13), the section of the auxiliary ring a (16) is a right trapezoid structure, and a fixing ring a (17) is installed on the top of the base (13) and located in the auxiliary ring a (16);

the inner diameter of the upper end of the auxiliary ring A (16) is D1, the inner diameter of the lower end of the auxiliary ring A (16) is D2, and D1 is more than D2; the height of the auxiliary ring A (16) is H1, the height of the fixed ring A (17) is H2, and H1 is more than H2.

3. A bellows valve according to claim 2, wherein the top seat (14) is coaxially disposed with the valve stem (8), the top seat (14) is provided with a top hole for the valve stem (8) to pass through, an auxiliary ring B (18) is installed at the bottom of the top seat (14), the section of the auxiliary ring B (18) is a right trapezoid structure, and a fixing ring B (19) is installed at the bottom of the auxiliary ring;

the outer diameter of the upper end of the auxiliary ring B (18) is D3, the outer diameter of the lower end of the auxiliary ring B (18) is D4, and D3 is more than D4.

4. A bellows valve according to claim 3, wherein the multilayer bellows comprises a first bellows (20) welded at an upper end to the fixing ring B (19) and at a lower end to the fixing ring a (17), the first bellows (20) being fitted over the valve stem (8); the outer diameters of the upper end and the lower end of the first corrugated pipe (20) are D5, the outer diameters of the fixing ring A (17) and the fixing ring B (19) are D6, D5 is larger than D6, and a step structure is formed between the upper end and the lower end of the first corrugated pipe (20) and the fixing ring A (17) and the fixing ring B (19) respectively;

the multilayer corrugated pipe also comprises a second corrugated pipe (21) positioned outside the first corrugated pipe (20), the inner wall of the upper end of the second corrugated pipe (21) is provided with a guide inclined plane A, and the outer wall of the lower end of the second corrugated pipe (21) is provided with a guide inclined plane B; the length of the first corrugated pipe (20) is L1, the length of the second corrugated pipe (21) is L2, and L1 is less than L2;

an upper welding area is formed among the guide inclined surface A, the first corrugated pipe (20), the auxiliary ring B (18) and the fixing ring B (19), and the upper welding area is filled with solder (22);

a lower welding area is formed among the guide inclined plane B, the first corrugated pipe (20), the auxiliary ring A (16) and the fixing ring A (17), and the lower welding area is filled with solder (22).

5. A bellows valve according to claim 4, wherein the angle between the guiding slope A and the X-direction is α, the angle between the outer wall of the auxiliary ring B (18) and the X-direction is β, α ≦ β; the included angle between the guide inclined plane B and the X direction is gamma, the included angle between the inner wall of the auxiliary ring A (16) and the X direction is theta, and gamma is less than or equal to theta.

6. A bellows valve according to claim 5, wherein the bellows assembly (12) further comprises a stop ring (23) mounted on the inner wall of the valve cover (3) and abutting against the top seat (14), and a pressure ring (24) mounted on top of the auxiliary ring A (16) and connected to the second bellows (21).

7. A bellows valve according to claim 1, wherein the adjusting means (11) comprises a vertical plate (25) mounted on top of the sealing cover (5), a through slot (26) is provided at a middle position of the vertical plate (25), a driving plate (27) movably mounted in the through slot (26), a translation frame (28) mounted on the driving plate (27) and having a rectangular frame structure, the translation frame (28) is movable in the Y direction, a translation block A (29) movably mounted on the vertical plate (25) and located above the translation frame (28), the translation block A (29) is movable in the Z direction, a transmission slope A (30) is provided at a bottom of the translation block A (29), a translation block B (31) movably mounted on the vertical plate (25) and located below the translation frame (28), the translation block B (31) is movable in the Z direction, a transmission slope B (32) is provided at a top of the translation block B (31), a rotating wheel (33) which is rotatably arranged in the translation frame (28) and is simultaneously abutted against the transmission inclined plane A (30) and the transmission inclined plane B (32), an adjusting rod (34) with one end penetrating through the vertical plate (25) and rotatably arranged on the driving plate (27) through a rolling bearing, the adjusting rod (34) is in threaded connection with the vertical plate (25), a pressing rod (35) which is arranged at the bottom of the translation block B (31) and is positioned outside the vertical plate (25), a pressing plate (36) which is arranged at the bottom of the pressing rod (35) and is abutted against the filler (10), a first spring (37) which is sleeved on the pressing rod (35) and is provided with one end arranged on the sealing cover (5) and the other end arranged on the translation block B (31), and a top plate (38) arranged at the top of the translation block A (29), one end of the second spring (39) is arranged on the top plate (38), the other end of the second spring is arranged on the vertical plate (25), and the second spring is respectively positioned at the front side and the rear side of the translation block A (29).

8. A bellows valve according to claim 7, wherein a pair of sliding plates A (40) are respectively mounted on the front and rear sides of the vertical plate (25), and the sliding plates A (40) are located above the through groove (26); the opposite surfaces of the two sliding plates A (40) are provided with sliding chutes A (41), the front side and the rear side of the translation block A (29) are respectively provided with sliding columns A which are matched with the sliding chutes A (41), and the sliding columns A are inserted into the sliding chutes A (41);

a pair of sliding plates B (42) are respectively arranged on the front side and the rear side of the vertical plate (25), and the sliding plates B (42) are positioned below the through grooves (26); the opposite surfaces of the two sliding plates B (42) are provided with sliding chutes B (43), the front side and the rear side of the translation block B (31) are respectively provided with sliding columns B which are matched with the sliding chutes B (43), and the sliding columns B are inserted into the sliding chutes B (43);

the translation block A (29) is positioned in the translation frame (28), and the transmission inclined plane A (30) is provided with a chute C (48); the translation block B (31) is positioned in the translation frame (28), and the transmission inclined plane B (32) is provided with a chute D (49); an annular inserting column (50) is arranged outside the roller, and the annular inserting column (50) is inserted into the chute C (48) and the chute D (49);

a sliding groove E (51) is arranged in the through groove (26), a sliding column E matched with the sliding groove E (51) in shape is installed on the driving block, and the sliding column E is inserted into the sliding groove E (51).

9. A bellows valve according to claim 8, characterized in that a guide rod (46) is mounted on the vertical plate (25), the guide rod (46) is located above the tank, a guide hole (47) for the guide rod (46) to pass through is formed in the translation block A (29), and the guide rod (46) and the guide hole (47) are matched in shape.

Technical Field

The invention particularly relates to a corrugated pipe valve.

Background

With the rapid development of modern industries such as chemical industry, nuclear industry and the like, pipelines which are inflammable, explosive, highly toxic and have radioactive media are increasingly increased, valves used on the pipelines and devices have special and strict requirements on leakage sealing of the pipelines and the devices, and the requirements cannot be met by using a common packing sealing device, so that a valve rod sealing structure with a corrugated pipe is required.

The corrugated pipe valve is characterized in that a protective film is additionally arranged in a sealing element and can stretch along with the opening and closing of a valve rod. Not only improves the energy efficiency, increases the safety of production equipment, reduces the maintenance cost and frequent maintenance, but also provides a clean and safe working environment. However, the existing bellows valve has the following problems: the corrugated pipe is sleeved outside the valve rod, two ends of the corrugated pipe are respectively connected with the valve rod and the valve cover through welding, welding can be performed only from the interface of the corrugated pipe in the radial direction during welding, and fluid pressure inside the valve and pressure of the valve on the corrugated pipe during opening of the valve can pass through the welding position, so that the welding position is cracked, and the phenomena of cracking and leakage are caused; secondly, the valve rod and the filler can slide, and the sealing effect is poor.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a corrugated pipe valve.

The technical scheme for solving the problems comprises the following steps: a corrugated pipe valve comprises a valve body, a flow cavity, a valve cover, a sealing cover, a central hole B, a central hole C, a valve rod, a valve core, a filler, a supporting frame, a swivel ring, a hand wheel, a valve rod, a swivel ring, a thread connection piece, a sealing cover and a sealing cover, wherein the flow cavity is arranged inside the valve body, the flow cavity is parallel to the X direction, the valve cover is arranged at the top of the valve body through a bolt, the central hole A is arranged on the valve cover and communicated with the flow cavity, the sealing cover is arranged at the top of the valve cover through a bolt, the central hole B is arranged on the sealing cover and communicated with the central hole A, the central hole C is arranged at the top of the sealing cover and communicated with the central hole B, the valve rod penetrates through the central holes A, the central hole B and the central hole C, the valve rod penetrates through the central holes A, the valve core is arranged at the bottom of the valve rod and positioned in the flow cavity, the valve core is arranged in the flow cavity, the sealing cover is arranged at the top of the valve rod, the support is arranged at the top of the valve rod, the valve rod is arranged at the top of the valve body, the valve rod is arranged in the valve body, the sealing cover is arranged in the valve body, the sealing cover through the valve rod, the valve rod is arranged at the valve rod, the valve body, the valve rod is arranged at the valve body, the valve rod, the valve body, the valve rod is arranged at the bottom of the valve rod, the valve body, the valve rod is arranged at the valve rod, the valve body, the valve rod is arranged at the valve body, the valve rod is arranged at the valve body, the valve rod, the valve body, the pair of adjusting devices are used for compressing the packing, are respectively positioned on the left side and the right side of the valve rod and are bilaterally symmetrical relative to the valve rod, the lower ends of the adjusting devices are installed on the valve rod, and the upper ends of the adjusting devices are installed on the sealing cover and are positioned in the corrugated pipe assembly in the valve cover;

the bellows subassembly is including installing the base on the valve rod, installing the footstock in the sealed lid bottom, and one end is installed on the base and the multilayer bellows of the other end installation on the footstock.

Furthermore, the base and the valve rod are coaxially arranged, a bottom hole for the valve rod to pass through is formed in the base, an auxiliary ring A is installed at the top of the base, the section of the auxiliary ring A is of a right-angled trapezoid structure, and a fixing ring A is installed at the top of the base and located in the auxiliary ring A;

the inner diameter of the upper end of the auxiliary ring A is D1, the inner diameter of the lower end of the auxiliary ring A is D2, and D1 is more than D2; the height of the auxiliary ring A is H1, the height of the fixing ring A is H2, and H1 is more than H2.

Furthermore, the top seat and the valve rod are coaxially arranged, a top hole for the valve rod to pass through is formed in the top seat, and an auxiliary ring B is arranged at the bottom of the top seat, the section of the auxiliary ring B is of a right-angled trapezoid structure, and the auxiliary ring B is arranged on a fixing ring B at the bottom of the auxiliary ring;

the outer diameter of the upper end of the auxiliary ring B is D3, the outer diameter of the lower end of the auxiliary ring B is D4, and D3 is larger than D4.

Further, the multilayer corrugated pipe comprises a first corrugated pipe of which the upper end is welded on the fixing ring B and the lower end is welded on the fixing ring A, and the first corrugated pipe is sleeved on the valve rod; the outer diameters of the upper end and the lower end of the first corrugated pipe are D5, the outer diameters of the fixing ring A and the fixing ring B are D6, D5 is larger than D6, and a step structure is formed between the upper end and the lower end of the first corrugated pipe and the fixing ring A and the fixing ring B respectively;

the multilayer corrugated pipe also comprises a second corrugated pipe positioned outside the first corrugated pipe, the inner wall of the upper end of the second corrugated pipe is provided with a guide inclined plane A, and the outer wall of the lower end of the second corrugated pipe is provided with a guide inclined plane B; the first bellows length is L1, the second bellows length is L2, L1 < L2;

an upper welding area is formed among the guide inclined plane A, the first corrugated pipe, the auxiliary ring B and the fixing ring B, and solder is filled in the upper welding area;

and a lower welding area is formed among the guide inclined plane B, the first corrugated pipe, the auxiliary ring A and the fixing ring A, and the lower welding area is filled with solder.

Furthermore, the included angle between the guide inclined plane A and the X direction is alpha, the included angle between the outer wall of the auxiliary ring B and the X direction is beta, and alpha is less than or equal to beta; the included angle between the guide inclined plane B and the X direction is gamma, the included angle between the inner wall of the auxiliary ring A and the X direction is theta, and gamma is less than or equal to theta.

Further, bellows subassembly still including installing on the valve gap inner wall and with the spacing ring of footstock butt, install at supplementary ring A top and the clamping ring of being connected with the second bellows.

Further, the adjusting device comprises a vertical plate arranged at the top of the sealing cover, a through groove is arranged at the middle position of the vertical plate, a driving plate movably arranged in the through groove, a translation frame which is arranged on the driving plate and has a rectangular frame structure, the translation frame can move along the Y direction, a translation block A which is movably arranged on the vertical plate and is positioned above the translation frame, the translation block A can move along the Z direction, a transmission inclined plane A is arranged at the bottom of the translation block A, a translation block B which is movably arranged on the vertical plate and is positioned below the translation frame and can move along the Z direction, a transmission inclined plane B is arranged at the top of the translation block B, a rotating wheel which is rotatably arranged in the translation frame and is simultaneously abutted against the transmission inclined plane A and the transmission inclined plane B, an adjusting rod which one end passes through the vertical plate and is rotatably arranged on the driving plate through a rolling bearing, the adjusting rod is in threaded connection with the vertical plate, and a pressure rod which is arranged at the bottom of the translation block B and is positioned outside the vertical plate, install in the depression bar bottom and with the clamp plate of filler butt, the cover is established on the depression bar and one end is installed at sealed lid, the first spring on translation piece B is installed to the other end, installs the roof at translation piece A top, one end is installed on roof and the other end and is installed on the riser, be located a pair of second spring of translation piece A front and back both sides respectively.

Further, a pair of sliding plates A are respectively arranged on the front side and the rear side of the vertical plate and are positioned above the through grooves; the opposite surfaces of the two sliding plates A are provided with sliding chutes A, the front side and the rear side of the translation block A are respectively provided with sliding columns A which are matched with the sliding chutes A, and the sliding columns A are inserted into the sliding chutes A;

a pair of sliding plates B are respectively arranged on the front side and the rear side of the vertical plate and are positioned below the through grooves; the opposite surfaces of the two sliding plates B are provided with sliding chutes B, the front side and the rear side of the translation block B are respectively provided with sliding columns B which are matched with the sliding chutes B, and the sliding columns B are inserted into the sliding chutes B;

the translation block A is positioned in the translation frame, and a chute C is arranged on the transmission inclined plane A; the translation block B is positioned in the translation frame, and a sliding groove D is arranged on the transmission inclined plane B; the outside of the roller is provided with an annular inserting column which is inserted into the chute C and the chute D;

a sliding groove E is arranged in the through groove, a sliding column E matched with the sliding groove E in shape is installed on the driving block, and the sliding column E is inserted into the sliding groove E.

Furthermore, install the guide bar on the riser, the guide bar is located the bucket groove top, is equipped with the guiding hole that supplies the guide bar to pass on the translation piece A, and shape fit between guide bar and the guiding hole.

The invention has the following beneficial effects: according to the invention, through the arrangement of the auxiliary ring A, the auxiliary ring B, the guide inclined plane A and the guide inclined plane B, the area of the corrugated pipe interface is increased, and the thermal capacity is improved, so that the welding area is increased, the strength of the corrugated pipe interface is improved, and meanwhile, the first corrugated pipe and the second corrugated pipe are utilized to jointly bear pressure, so that the pressure bearing capacity is greatly improved; the pressure dispersing device has the advantages that the pressure dispersing device plays a role in dispersing pressure to welding points at the corrugated pipe interface through the limiting ring and the pressing ring, pressure of fluid acting on the welding points at the corrugated pipe interface is reduced, and therefore the problem that the interface welding position of the existing corrugated pipe is prone to cracking is solved. The problems that the existing filler is easy to slide and the sealing effect of the valve rod is poor are solved through the adjusting device; through forming the voussoir structure between translation frame, gyro wheel, translation piece A, the translation piece B, utilize to rotate the regulation pole, drive translation piece A, translation piece B downstream, depression bar, clamp plate compress tightly the filler downwards along with translation piece B motion, avoid because of the sealed effect of filler slip influence.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a front cross-sectional view of the present invention;

FIG. 3 is a front cross-sectional view of a bellows assembly of the present invention;

FIG. 4 is a front view of the adjustment device of the present invention;

FIG. 5 is a front view partially in section of the adjustment device of the present invention;

fig. 6 is a side view of the adjustment device of the present invention.

In the figure:

1-valve body, 2-flow chamber, 3-valve cover, 4-central hole A, 5-sealing cover, 7-central hole C, 8-valve rod, 9-valve core, 10-filler, 11-adjusting device, 12-bellows component, 13-base, 14-top seat, 16-auxiliary ring A, 17-fixing ring A, 18-auxiliary ring B, 19-fixing ring B, 20-first bellows, 21-second bellows, 22-solder, 23-spacing ring, 24-pressure ring, 25-vertical plate, 26-through groove, 27-drive plate, 28-translation frame, 29-translation block A, 30-transmission slope A, 31-translation block B, 32-transmission slope B, 33-runner, 34-adjusting rod, 35-pressure rod, 36-pressure plate, 37-first spring, 38-top plate, 39-second spring, 40-sliding plate A, 41-sliding groove A, 42-sliding plate B, 43-sliding groove B, 46-guide rod, 47-guide hole, 48-sliding groove C, 49-sliding groove D, 50-annular insertion column, 51-sliding groove E, 52-support frame, 53-swivel ring and 54-hand wheel.

Detailed Description

The invention is further described with reference to the following drawings and detailed description.

A corrugated pipe valve comprises a valve body 1 with a flow cavity 2 arranged inside, the flow cavity 2 is parallel to the X direction, a valve cover 3 arranged on the top of the valve body 1 through bolts, a center hole A4 communicated with the flow cavity 2 is arranged on the valve cover 3, a sealing cover 5 arranged on the top of the valve cover 3 through bolts, a center hole B communicated with a center hole A4 is arranged on the sealing cover 5, a center hole C7 communicated with the center hole B is arranged on the top of the sealing cover 5, a valve rod 8 penetrating through the center hole A4, the center hole B and the center hole C7, a valve core 9 arranged at the bottom of the valve rod 8 and positioned in the flow cavity 2 and used for closing or opening the flow cavity 2, a filler 10 positioned in the center hole C7 and tightly abutted against the valve rod 8, a support frame 52 arranged on the top of the sealing cover 5, a swivel 53 rotatably arranged on the top of the support frame 52 through a rolling bearing, a hand wheel 54 arranged at the top of the swivel 53 and positioned above the support frame 52, the valve rod 8 penetrates through the rotating ring 53 and is in threaded connection with the rotating ring 53, the pair of adjusting devices 11 are installed at the top of the sealing cover 5 and located in the supporting frame 52 and used for compressing the packing 10, the adjusting devices 11 are located on the left side and the right side of the valve rod 8 respectively and are bilaterally symmetrical relative to the valve rod 8, the lower end of each adjusting device is installed on the valve rod 8, and the upper end of each adjusting device is installed on the sealing cover 5 and located in the bellows assembly 12 in the valve cover 3.

The bellows assembly 12 includes a base 13 mounted on the valve stem 8, a top seat 14 mounted at the bottom of the sealing cap 5, and a multi-layer bellows having one end mounted on the base 13 and the other end mounted on the top seat 14.

The base 13 and the valve rod 8 are coaxially arranged, a bottom hole for the valve rod 8 to pass through is formed in the base 13, an auxiliary ring A16 is installed at the top of the base 13, the section of the auxiliary ring A16 is of a right-angled trapezoid structure, and the auxiliary ring A17 is installed at the top of the base 13 and is located in the auxiliary ring A16;

the inner diameter of the upper end of the auxiliary ring A16 is D1, the inner diameter of the lower end of the auxiliary ring A16 is D2, and D1 is more than D2; the height of the auxiliary ring A16 is H1, the height of the fixing ring A17 is H2, and H1 is more than H2.

The top seat 14 and the valve rod 8 are coaxially arranged, a top hole for the valve rod 8 to pass through is formed in the top seat 14, and an auxiliary ring B18 is installed at the bottom of the top seat 14, the section of the auxiliary ring B18 is of a right-angled trapezoid structure, and a fixing ring B19 is installed at the bottom of the auxiliary ring;

the outer diameter of the upper end of the auxiliary ring B18 is D3, the outer diameter of the lower end of the auxiliary ring B18 is D4, and D3 is more than D4.

The multilayer corrugated pipe comprises a first corrugated pipe 20, the upper end of the first corrugated pipe is welded on the fixing ring B19, the lower end of the first corrugated pipe is welded on the fixing ring A17, and the first corrugated pipe 20 is sleeved on the valve rod 8; the outer diameters of the upper end and the lower end of the first corrugated pipe 20 are D5, the outer diameters of the fixing ring A17 and the fixing ring B19 are D6, D5 is more than D6, and a step structure is formed between the upper end and the lower end of the first corrugated pipe 20 and the fixing ring A17 and the fixing ring B19 respectively;

the multilayer corrugated pipe also comprises a second corrugated pipe 21 positioned outside the first corrugated pipe 20, the inner wall of the upper end of the second corrugated pipe 21 is provided with a guide inclined plane A, and the outer wall of the lower end of the second corrugated pipe 21 is provided with a guide inclined plane B; the length of the first corrugated pipe 20 is L1, the length of the second corrugated pipe 21 is L2, and L1 is less than L2;

an upper welding area is formed among the guide inclined plane A, the first corrugated pipe 20, the auxiliary ring B18 and the fixing ring B19, and the upper welding area is filled with solder 22; the guide slope B forms a lower land with the first bellows 20, the auxiliary ring a16, and the fixing ring a17, and the lower land is filled with solder 22.

The included angle between the guide inclined plane A and the X direction is alpha, the included angle between the outer wall of the auxiliary ring B18 and the X direction is beta, and alpha is less than or equal to beta; the included angle between the guide inclined plane B and the X direction is gamma, the included angle between the inner wall of the auxiliary ring A16 and the X direction is theta, and gamma is less than or equal to theta. By setting the inclination angle, a welding space is reserved, the solder 22 is ensured to enter the upper welding area and the lower welding area, and the occurrence of cold joint is avoided.

The bellows assembly 12 further includes a limiting ring 23 mounted on the inner wall of the valve cover 3 and abutted to the top seat 14, and a pressing ring 24 mounted on the top of the auxiliary ring a16 and connected to the second bellows 21.

The auxiliary ring A16, the auxiliary ring B18, the guide inclined plane A and the guide inclined plane B are arranged, so that the area of the corrugated pipe interface is increased, the heat capacity is improved, the welding area is increased, the strength of the corrugated pipe interface is improved, and meanwhile, the first corrugated pipe 20 and the second corrugated pipe 21 are utilized to jointly bear pressure, so that the pressure bearing capacity is greatly improved; the auxiliary protection effect is achieved on the welding points at the corrugated pipe connector through the limiting ring 23 and the pressing ring 24, the effect of dispersing pressure is achieved, the pressure of the fluid acting on the welding points at the corrugated pipe connector is reduced, and therefore the problem that the connector welding position of the existing corrugated pipe is prone to cracking is solved.

The adjusting device 11 comprises a vertical plate 25 arranged at the top of the sealing cover 5, a through groove 26 is arranged in the middle of the vertical plate 25, a driving plate 27 movably arranged in the through groove 26, a translation frame 28 which is arranged on the driving plate 27 and has a rectangular frame structure, the translation frame 28 can move along the Y direction, a translation block A29 which is movably arranged on the vertical plate 25 and is positioned above the translation frame 28, a translation block A29 can move along the Z direction, a transmission inclined plane A30 is arranged at the bottom of the translation block A29, a translation block B31 which is movably arranged on the vertical plate 25 and is positioned below the translation frame 28, a translation block B31 can move along the Z direction, a transmission inclined plane B32 is arranged at the top of the translation block B31, a rotating wheel 33 which is rotatably arranged in the translation frame 28 and is abutted against the transmission inclined plane A30 and the transmission inclined plane B32, an adjusting rod 34 with one end passing through the vertical plate 25 and rotatably arranged on the driving plate 27 through a rolling bearing, and the adjusting rod 34 is in threaded connection with the vertical plate 25, install the depression bar 35 in translation piece B31 bottom and be located the riser 25 outside, install in the depression bar 35 bottom and with the clamp plate 36 of filler 10 butt, the cover is established on depression bar 35 and one end is installed at sealed lid 5, the first spring 37 on translation piece B31 is installed to the other end, install the roof 38 at translation piece A29 top, one end is installed on roof 38 and the other end is installed on riser 25, be located the second spring 39 of a pair of both sides around translation piece A29 respectively.

A pair of sliding plates A40 are respectively arranged on the front side and the rear side of the vertical plate 25, and the sliding plates A40 are positioned above the through grooves 26; the opposite surfaces of the two sliding plates A40 are provided with sliding grooves A41, the front side and the rear side of the translation block A29 are respectively provided with sliding columns A which are matched with the sliding grooves A41, and the sliding columns A are inserted into the sliding grooves A41; a pair of sliding plates B42 are respectively arranged on the front side and the rear side of the vertical plate 25, and the sliding plates B42 are positioned below the through grooves 26; the opposite surfaces of the two sliding plates B42 are provided with sliding grooves B43, the front side and the rear side of the translation block B31 are respectively provided with sliding columns B which are matched with the sliding grooves B43, and the sliding columns B are inserted into the sliding grooves B43; the vertical plate 25 is provided with a guide rod 46, the guide rod 46 is positioned above the bucket groove, a guide hole 47 for the guide rod 46 to pass through is arranged on the translation block A29, and the guide rod 46 is matched with the guide hole 47 in shape.

The translation block A29 is positioned in the translation frame 28, and a sliding groove C48 is arranged on the transmission inclined plane A30; the translation block B31 is positioned in the translation frame 28, and a sliding groove D49 is arranged on the transmission inclined plane B32; the roller is externally provided with an annular inserting column 50, and the annular inserting column 50 is inserted into the sliding groove C48 and the sliding groove D49; a sliding groove E51 is arranged in the through groove 26, a sliding column E matched with the sliding groove E51 in shape is arranged on the driving block, and the sliding column E is inserted into the sliding groove E51.

The problems that the existing filler 10 is easy to slide and the sealing effect of the valve rod 8 is poor are solved through the adjusting device 11; through forming the voussoir structure between just translation frame 28, the gyro wheel, translation piece A29, translation piece B31, utilize rotation regulation pole 34, drive translation frame 28 and remove along the Y direction, drive translation piece A29, translation piece B31 and move and the direction of motion is the same along the Z direction, make translation piece A29, translation piece B31 downstream, depression bar 35, clamp plate 36 move along with translation piece B31, compress tightly filler 10 downwards, avoid influencing sealed effect because of filler 10 slides.

The working principle of the invention is as follows:

s1: when the valve is used, the multilayer corrugated pipe is sleeved on the valve rod 8, the upper end of the first corrugated pipe 20 is welded on the fixing ring B19, the lower end of the first corrugated pipe is welded on the fixing ring A17, an upper welding area and a lower welding area are welded, the valve rod 8 penetrates through the valve cover 3, the valve cover 3 and the valve body 1 are connected through bolts, and the valve cover 3 and the sealing cover 5 are connected through bolts; the central hole C7 is internally provided with a packing 10, and the packing 10 is tightly propped against the valve rod 8;

s2: the adjusting rod 34 is rotated to drive the translation frame 28 to move along the Y direction, the translation block a29 and the translation block B31 are driven to move along the Z direction, and the moving directions are the same, so that the translation block a29 and the translation block B31 move downwards, the first spring 37 and the second spring 39 are compressed, and the pressing rod 35 and the pressing plate 36 move along with the translation block B31 to press the filler 10 downwards.

Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.