CN209800773U - Novel ultra-low temperature ball valve - Google Patents

Abstract

the utility model discloses a novel ultra-low temperature ball valve, including first valve body, the left side threaded connection of first valve body has the second valve body, the inside movable mounting of disk seat has the case, the top of case is provided with the valve rod, first standing groove has been seted up to the inside of first valve body, the left side interference fit of first standing groove has first disk seat, the second standing groove has been seted up on the right side of second valve body. The utility model discloses a sealing connection of combination sealing member and first seal groove improves the leakproofness of valve rod, the second valve seat of rethread movable mounting makes it have buffer space reducing wear, the sealed shock attenuation effect of first disk seat can be improved to the shock attenuation sealing ring simultaneously, the problem that current low temperature ball valve has the disk seat to easily consume and valve rod department easily reveals in low temperature environment when using has been solved, this novel ultra-low temperature ball valve possesses the disk seat and increases and the difficult advantage of revealing of valve rod department in low temperature environment life, improve low temperature ball valve's life and practicality.

Description

Novel ultra-low temperature ball valve

Technical Field

The utility model relates to a ball valve technical field specifically is a novel ultra-low temperature ball valve.

Background

The ball valve is a valve whose opening and closing part is a ball body and is driven by operating a valve rod to rotate around the axis of the ball valve, is mainly used for adjusting and controlling fluid and has wide application in various pipelines in production and life. In current production pipeline, when the pipeline temperature is low excessively, sealed very easily takes place to reveal between the valve internals, and what especially obvious is that revealing between spheroid and the disk seat, revealing between first valve body and the second valve body lead to the low temperature ball valve to change the disk seat often to valve rod department reveals and can influence the conversion that the case is closed and opened, thereby has reduced the practicality.

SUMMERY OF THE UTILITY MODEL

an object of the utility model is to provide a novel ultra-low temperature ball valve possesses the disk seat in low temperature environment life increase and the difficult advantage of revealing of valve rod department, has solved current low temperature ball valve and has had the disk seat when using and easily consume and the valve rod easily reveals the problem of locating to reveal in low temperature environment.

In order to achieve the above object, the utility model provides a following technical scheme: a novel ultralow temperature ball valve comprises a first valve body, wherein the left side of the first valve body is in threaded connection with a second valve body, a valve core is movably arranged in the first valve body, a valve rod is arranged at the top of the valve core, a first placing groove is arranged in the first valve body, a first valve seat is in interference fit with the left side of the first placing groove, a second placing groove is formed in the right side of the second valve body, a second valve seat is movably arranged at the right side of the second placing groove, a sealing cap is connected with the left side of the top of the first valve body in a threaded manner, the top of the first valve body is provided with a first sealing groove positioned on the surface of the valve rod, the top of the first sealing groove is provided with a combined sealing element, the constant head tank has been seted up on the right side of first standing groove inner wall, the inside interference fit of constant head tank has the shock attenuation sealing ring, the left side of shock attenuation sealing ring and the right side seal fit of first disk seat.

Preferably, the right side of second standing groove is provided with damping spring, damping spring's right side and the left side contact of second valve seat, damping spring's material is made for the plastics material, the equal fixedly connected with stopper in top and the bottom of second valve seat, the spout with stopper sliding connection is seted up on the right side of second valve body.

Preferably, the left side fixedly connected with triangle ring pad of shock attenuation sealing ring, triangle ring pad has set gradually two from outer to interior, and two triangle ring pad cross sectional areas are the same, the triangle annular with triangle ring pad interference fit is seted up on the right side of first disk seat, triangle ring pad and shock attenuation sealing ring are pps material and make.

Preferably, the combined sealing element comprises an inclined sealing ring and a flat sealing ring, the inner side of the sealing cap is fixedly connected with a pressing block, the bottom of the pressing block is fixedly connected with a pressing ring, and the bottom of the pressing ring is in contact with the top of the inclined sealing ring.

Preferably, the top of the first valve body is provided with a thread groove in threaded connection with the bottom of the sealing cap, the bottom of the inner wall of the thread groove is fixedly connected with a sealing gasket, and the top of the sealing gasket is in sealing fit with the bottom of the sealing cap.

Preferably, a second sealing groove is formed in the left side of the first valve body, and a second sealing ring in sealing fit with the second sealing groove is fixedly connected to the right side of the second valve body.

Preferably, a sealing device is arranged between contact surfaces of the first valve body and the second valve body, the sealing device comprises an elastic sealing ring, a third sealing groove and lubricating grease, the elastic sealing ring is installed in the third sealing groove, the third sealing groove is formed in the contact surface of the second valve body and the first valve body, and the lubricating grease is arranged between the elastic sealing ring and the first valve body; the elastic sealing ring is a Z-shaped elastic sealing ring and comprises a first sealing lip, a second sealing lip and a first sealing ring bottom, the first sealing lip and the second sealing lip are positioned on two sides of the upper end of the first sealing ring bottom and form a lip groove, and the lubricating grease is coated in the lip groove of the Z-shaped elastic sealing ring; the first sealing lip and the second sealing lip are respectively aligned with the left end face and the right end face of the bottom of the first sealing ring, the first sealing lip and the second sealing lip are adjacent to and collinear with the upper bottom face of the bottom of the first sealing ring, the sections of the first sealing lip and the second sealing lip are rectangular, and the upper bottom edges of the first sealing lip and the second sealing lip are circular arcs; the section of the bottom of the first sealing ring is rectangular, two triangular grooves are formed in two side edges of the bottom of the first sealing ring respectively, and the two triangular grooves are located at 1/3 and 2/3 of the two side edges of the bottom of the first sealing ring respectively.

Preferably, each triangular groove is an isosceles triangle, the angle of the vertex angle is set to be 25-40 degrees, and the vertex angle can be rounded.

preferably, a reset device is arranged between the bottom of the first seal ring and the third seal groove, the reset device comprises a mounting sleeve, an end plate, a slider, an end cover and a reset spring, the end plate is fixedly connected to the end face of one end of the mounting sleeve, an opening is arranged on the end plate corresponding to one end of the mounting sleeve, the end cover is arranged on the end face of the other end of the mounting sleeve, a first mounting groove communicated with the mounting sleeve is arranged on the end cover, the slider is slidably arranged in the mounting sleeve and is positioned between the end plate and the end cover, a boss is arranged on the surface of the slider close to the opening, the orthographic projection of the boss on the plane of the end plate is positioned in the opening, and at least part of the orthographic projection of the slider on the plane of the end plate is positioned outside the opening, the slider orientation the one side intermediate position of end cover is provided with the second mounting groove, reset spring sets up in the installation sleeve and its both ends are located first mounting groove with between the second mounting groove.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. The utility model discloses a sealing connection of combination sealing member and first seal groove improves the leakproofness of valve rod, the second valve seat of rethread movable mounting makes it have buffer space reducing wear, the sealed shock attenuation effect of first disk seat can be improved to the shock attenuation sealing ring simultaneously, the problem that current low temperature ball valve has the disk seat to easily consume and valve rod department easily reveals in low temperature environment when using has been solved, this novel ultra-low temperature ball valve possesses the disk seat and increases and the difficult advantage of revealing of valve rod department in low temperature environment life, improve low temperature ball valve's life and practicality.

2. The damping spring is arranged on the right side of the second placing groove, the right side of the damping spring is contacted with the left side of the second valve seat, the damping spring is made of plastic material, the top and the bottom of the second valve seat are fixedly connected with the limit blocks, the right side of the second valve body is provided with the sliding groove which is in sliding connection with the limit blocks, the design is convenient for a user to ensure that the second valve seat can keep the sealing performance through the elasticity of the damping spring through the arrangement of the damping spring, the limiting block and the sliding groove, and simultaneously the vibration damage to the second valve seat can be reduced when the valve core is closed and started instantly, and when the second valve seat is worn, the second valve seat can be continuously matched with the valve core by providing elastic support through the damping spring, meanwhile, the sliding connection of the limiting block and the sliding groove enables the second valve seat not to be rotated by vibration or to be flushed by fluid when the valve seat is used, and the second valve seat is prevented from rotating to accelerate the loss of the damping spring made of plastic.

3. the utility model discloses because of the left side fixedly connected with triangle ring pad of shock attenuation sealing ring, triangle ring pad has set gradually two from outer to interior, and two triangle ring pad cross-sectional areas are the same, the triangle annular with triangle ring pad interference fit is seted up on the right side of first disk seat, triangle ring pad and shock attenuation sealing ring are pps material and make, the setting of triangle ring pad and triangle annular is passed through in this design, convenient to use person forms two sealed damping areas through two triangle ring pads, triangle ring pad can provide the elastic sealing power to first disk seat with the interference fit of triangle annular simultaneously, the in close contact with that makes first disk seat and case can last, and triangle ring pad and the shock attenuation sealing ring of ppe material can improve low temperature resistant effect, thereby its material still can keep its toughness in low temperature environment to improve the sealed effect of case simultaneously.

4. The utility model discloses because of the combined seal spare includes slope sealing washer and flat sealing washer, the inboard fixedly connected with briquetting of sealing cap, the bottom fixedly connected with clamping ring of briquetting, the bottom of clamping ring and the top contact of slope sealing washer, this design is through the slope sealing washer, level and smooth sealing washer, the setting of briquetting and clamping ring, convenient to use person compresses tightly through the chamfer department of slope sealing washer with valve rod surface and seals, level and smooth sealing washer can improve valve rod surface's leakproofness simultaneously, prevent that case department from revealing the fluid, can drive the briquetting and push down after sealing cap and the first valve body threaded connection, the briquetting drives the clamping ring and pushes down downwards, the clamping ring is pushed down combined seal spare and is closely cooperated with first seal groove, the leakproofness to the valve rod is improved.

5. The utility model discloses because of the thread groove of the bottom threaded connection of the top seted up with sealed cap of first valve body, the bottom fixedly connected with of thread groove inner wall is sealed to fill up, and the sealed top of filling up and the sealed bottom of cap are sealed to be cooperated, and this design is through the thread groove and the sealed setting that fills up, and convenient to use person makes sealed cap can seal up with the sealed top in close contact with of filling up after threaded connection through the thread groove, improves the threaded connection leakproofness of sealed cap.

6. The utility model discloses because of the second seal groove has been seted up in the left side of first valve body, the right side fixedly connected with of second valve body and the sealed complex second sealing washer of second seal groove, this design is through the setting of second seal groove and second sealing washer, and convenient to use person makes second valve body and first valve body threaded connection back sealed effect better through the sealing connection of second sealing washer and second seal groove.

Drawings

Fig. 1 is a schematic structural view of a novel ultralow temperature ball valve provided in an embodiment of the present invention;

FIG. 2 is an enlarged view of the utility model at A;

FIG. 3 is an enlarged view of the utility model at B;

fig. 4 is an enlarged view of the utility model at C;

Fig. 5 is a left side view structural diagram of the second valve seat of the present invention;

Fig. 6 is a schematic structural view of a novel ultra-low temperature ball valve provided in another embodiment of the present invention;

FIG. 7 is an enlarged view taken at D in FIG. 6;

Fig. 8 is a schematic structural view of an elastic sealing ring according to an embodiment of the present invention;

Fig. 9 is a schematic structural view of a resetting device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-9, a novel ultra-low temperature ball valve includes a first valve body 1, a thread groove 21 in threaded connection with the bottom of a sealing cap 9 is formed at the top of the first valve body 1, a sealing gasket 22 is fixedly connected to the bottom of the inner wall of the thread groove 21, the top of the sealing gasket 22 is in sealing fit with the bottom of the sealing cap 9, the design is through the arrangement of the thread groove 21 and the sealing gasket 22, a user can seal the sealing cap 9 after threaded connection with the top of the sealing gasket 22 through the thread groove 21, the thread connection sealing performance of the sealing cap 9 is improved, a second sealing groove 23 is formed at the left side of the first valve body 1, a second sealing ring 24 in sealing fit with the second sealing groove 23 is fixedly connected to the right side of the second valve body 2, the design is through the arrangement of the second sealing groove 23 and the second sealing ring 24, and the user can make the second valve body 2 and the first valve body 1 be in threaded connection through the sealing connection of the second sealing ring The sealing effect is better, the left side of the first valve body 1 is in threaded connection with the second valve body 2, the valve core 3 is movably installed inside the first valve body 1, the top of the valve core 3 is provided with the valve rod 4, the first placing groove 5 is formed inside the first valve body 1, the left side of the first placing groove 5 is in interference fit with the first valve seat 6, the right side of the second valve body 2 is provided with the second placing groove 7, as the damping spring 14 is arranged on the right side of the second placing groove 7, the right side of the damping spring 14 is in contact with the left side of the second valve seat 8, the damping spring 14 is made of plastic materials, the top and the bottom of the second valve seat 8 are both fixedly connected with the limiting block 15, the right side of the second valve body 2 is provided with the sliding groove 16 in sliding connection with the limiting block 15, and through the arrangement of the damping spring 14, the limiting block 15 and the sliding groove 16, a user can conveniently keep the, meanwhile, when the valve core 3 is instantly closed and started, the vibration damage to the second valve seat 8 can be reduced, after the second valve seat 8 is abraded, the second valve seat 8 can be continuously matched with the valve core 3 tightly through the elastic support provided by the damping spring 14, meanwhile, the sliding connection between the limiting block 15 and the sliding groove 16 enables the second valve seat 8 not to be rotated by vibration or to be flushed by fluid when in use, the second valve seat 8 is prevented from rotating to accelerate the loss of the damping spring 14 made of plastic materials, the second valve seat 8 is movably installed on the right side of the second placing groove 7, the sealing cap 9 is connected with the left side of the top of the first valve body 1 in a threaded manner, the first sealing groove 10 located on the surface of the valve rod 4 is formed in the top of the first valve body 1, the combined sealing element 11 is arranged at the top of the first sealing groove 10, and the combined sealing element 11 comprises an inclined sealing, the bottom of the pressing block 19 is fixedly connected with a pressing ring 20, the bottom of the pressing ring 20 is in contact with the top of the inclined sealing ring 111, the design is characterized in that the inclined sealing ring 111, the leveling sealing ring 112, the pressing block 19 and the pressing ring 20 are arranged, a user can conveniently press and seal the chamfer angle position on the surface of the valve rod 4 through the inclined sealing ring 111, meanwhile, the leveling sealing ring 112 can improve the sealing performance on the surface of the valve rod 4 to prevent fluid leakage at the valve core 3, the pressing block 19 can be driven to press downwards after the sealing cap 9 is in threaded connection with the first valve body 1, the pressing block 19 drives the pressing ring 20 downwards, the pressing ring 20 presses the combined sealing element 11 downwards to be tightly matched with the first sealing groove 10, the sealing performance on the valve rod 4 is improved, the positioning groove 12 is formed in the right side of the inner wall of the first placing groove 5, the damping sealing ring 13 is in, two triangular ring gaskets 17 are sequentially arranged from outside to inside, the cross sections of the two triangular ring gaskets 17 are the same, the right side of the first valve seat 6 is provided with a triangular ring groove 18 which is in interference fit with the triangular ring gaskets 17, the triangular ring gaskets 17 and the damping sealing ring 13 are both made of pps materials, the design is convenient for a user to form two sealing and damping areas through the two triangular ring gaskets 17 through the arrangement of the triangular ring gaskets 17 and the triangular ring grooves 18, meanwhile, the interference fit of the triangular ring gasket 17 and the triangular ring groove 18 can provide elastic sealing force for the first valve seat 6, so that the first valve seat 6 can be continuously and tightly contacted with the valve core 3, and the triangle ring pad 17 and the shock absorption sealing ring 13 made of ppe material can improve the low temperature resistance effect, meanwhile, the material of the damping sealing ring can still keep the toughness in a low-temperature environment, so that the sealing effect of the valve core 3 is improved, and the left side of the damping sealing ring 13 is in sealing fit with the right side of the first valve seat 6.

when the valve core is used, when a user repeatedly starts the closed valve core 3, the second valve seat 8 can keep the sealing performance through the elastic force of the damping spring 14, meanwhile, the vibration damage to the second valve seat 8 can be reduced when the valve core 3 is instantly closed and started, after the second valve seat 8 is abraded, the damping spring 14 can provide elastic support to enable the second valve seat 8 to be continuously and tightly matched with the valve core 3, meanwhile, the sliding connection of the limiting block 15 and the sliding groove 16 enables the second valve seat 8 not to be rotated by vibration or to be rotated by fluid when the valve core is used, the damping spring 14 made of plastic materials is prevented from being abraded by the rotation of the second valve seat 8, two sealing and damping areas are formed through the two triangular ring gaskets 17, meanwhile, the triangular ring gaskets 17 and the triangular ring grooves 18 are in interference fit to provide elastic sealing force for the first valve seat 6, the first valve seat 6 and the valve core 3 can be continuously and tightly contacted, and the triangular ring gaskets 17 and the damping sealing rings 13 made of, simultaneously, the material of the valve core can still keep the toughness of the valve core 3 in a low-temperature environment, the chamfer position on the surface of the valve rod 4 is compressed and sealed through the inclined sealing ring 111, meanwhile, the sealing performance of the surface of the valve rod 4 can be improved through the flattening sealing ring 112, fluid leakage at the position of the valve core 3 is prevented, the sealing cap 9 can drive the pressing block 19 to press downwards after being in threaded connection with the first valve body 1, the pressing block 19 drives the pressing ring 20 to press downwards, the pressing ring 20 presses the combined sealing part 11 downwards to be tightly matched with the first sealing groove 10, the sealing performance of the valve rod 4 is improved, and the service lives of the first valve seat 6 and the second valve seat 8 are prolonged.

In summary, the following steps: this novel ultra-low temperature ball valve improves the leakproofness of valve rod 4 through the sealing connection of composite seal 11 with first seal groove 10, and the second disk seat 8 of rethread movable mounting makes it have buffer space reducing wear, and shock attenuation sealing ring 13 can improve the sealed shock attenuation effect of first disk seat 6 simultaneously, has solved current low temperature ball valve and has had the problem that the disk seat easily decreases in low temperature environment and valve rod department easily reveals when using.

As shown in fig. 6 to 8, in an embodiment, a sealing device is disposed between contact surfaces of the first valve body 1 and the second valve body 2, the sealing device includes an elastic sealing ring 251, a third sealing groove 252, and grease 253, the elastic sealing ring 251 is mounted in the third sealing groove 252, the third sealing groove 252 is opened on a contact surface between the second valve body 2 and the first valve body 1, and the grease 253 is disposed between the elastic sealing ring 251 and the first valve body 1; the elastic sealing ring 251 is a Z-shaped elastic sealing ring and comprises a first sealing lip 2510, a second sealing lip 2511 and a first sealing ring bottom 2512, the first sealing lip 2510 and the second sealing lip 2511 are positioned on two sides of the upper end of the first sealing ring bottom 2512 and form a lip groove, and the lubricating grease 253 is coated in the lip groove of the Z-shaped elastic sealing ring; the first sealing lip 2510 and the second sealing lip 2511 are respectively aligned with the left end face and the right end face of the first sealing ring bottom 2512, the first sealing lip 2510 and the second sealing lip 2511 are adjacent to and collinear with the upper bottom face of the first sealing ring bottom 2512, the sections of the first sealing lip 2510 and the second sealing lip 2511 are rectangular, and the upper bottom edges of the first sealing lip 2510 and the second sealing lip 2511 are circular arcs 254; the cross section of the first sealing ring bottom 2512 is rectangular, two triangular grooves 255 are formed in two sides of the first sealing ring bottom 2512, and the two triangular grooves 255 are located at 1/3 and 2/3 of the two sides of the first sealing ring bottom 2512 respectively.

preferably, each of the triangular grooves 255 is an isosceles triangle, and the angle of the vertex angle is set to 25 ° to 40 °, and the vertex angle may be rounded.

The working principle of the technical scheme is as follows:

pressure liquid flow acts on the first sealing lip to realize primary dynamic sealing, and leakage pressure liquid flow of the primary dynamic sealing acts on the second sealing lip to realize secondary dynamic sealing. The lubricating grease is mainly used for occasions where a liquid flow medium is low-viscosity liquid and the lubricating property is poor. The grease is replaced by an O-shaped sealing ring, and three-level sealing can be realized; the lubricating grease can be replaced by other sealing fillers to meet special requirements. On the bottom of the third sealing groove, because the triangular groove of the Z-shaped elastic sealing ring has the pressure liquid flow effect, on one hand, the lower bottom surface of the bottom of the first sealing ring is better attached to the bottom plane of the third sealing groove, the sealing area is large, the sealing performance is good, and the Z-shaped elastic sealing ring has better stable supporting effect; on the other hand, the first sealing lip and the second sealing lip are pressed on the first valve body, so that the first valve body and the second valve body are more attached, and the sealing effect is better. At this time, the arcs of the first sealing lip and the second sealing lip are pressed into an arc with a larger curvature radius, and deformation is generated.

as shown in fig. 9, in an embodiment, a resetting device is disposed between the first seal ring bottom 2512 and the third seal groove 252, the resetting device includes a mounting sleeve 261, an end plate 262, a sliding block 263, an end cover 264 and a return spring 265, the end plate 262 is fixedly connected to an end surface of one end of the mounting sleeve 261, an opening 2621 is disposed on the end plate 262 corresponding to one end of the mounting sleeve 261, the end cover 264 is disposed on an end surface of the other end of the mounting sleeve 261, a first mounting groove 2641 communicating with the mounting sleeve 261 is disposed on the end cover 264, the sliding block 263 is slidably disposed in the mounting sleeve 261, the sliding block 263 is located between the end plate 262 and the end cover 264, a boss 2631 is disposed on a surface of the sliding block 263 close to the opening 2621, an orthographic projection of the boss 2631 on a plane of the end plate 262 is located in the opening 2621, the front projection of the sliding block 263 on the plane of the end plate 262 is at least partially located outside the opening 2621, a second mounting groove 2632 is disposed at a middle position of a side of the sliding block 263 facing the end cap 264, and the return spring 265 is disposed in the mounting sleeve 261 and has two ends located between the first mounting groove 2641 and the second mounting groove 2632.

This embodiment sets up end plate and end cover respectively through the both ends at the installation sleeve, set up the slider in the installation sleeve, be provided with the lug on the slider, be provided with the opening on the end plate, because the orthographic projection of boss on the end plate place plane is located the opening, the orthographic projection of slider on the end plate place plane has at least the part to be located outside the opening, make the slider can slide the telescopic one end of installation under reset spring's elastic action, make the lug stretch out from the opening, thereby promote elastic seal circle and reset fast, this resetting means simple structure, and the maintenance of being convenient for, and is small.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides a novel ultra-low temperature ball valve, includes first valve body (1), its characterized in that: the left side of the first valve body (1) is in threaded connection with a second valve body (2), a valve core (3) is movably mounted inside the first valve body (1), a valve rod (4) is arranged at the top of the valve core (3), a first placing groove (5) is formed inside the first valve body (1), a first valve seat (6) is in interference fit with the left side of the first placing groove (5), a second placing groove (7) is formed in the right side of the second valve body (2), a second valve seat (8) is movably mounted on the right side of the second placing groove (7), a sealing cap (9) is in threaded connection with the left side of the top of the first valve body (1), a first sealing groove (10) located on the surface of the valve rod (4) is formed in the top of the first valve body (1), a combined sealing element (11) is arranged on the top of the first sealing groove (10), a positioning groove (12) is formed in the right side of the inner wall of the first placing groove, the inside interference fit of constant head tank (12) has shock attenuation sealing ring (13), the left side of shock attenuation sealing ring (13) and the right side seal fit of first disk seat (6).

2. The novel ultra-low temperature ball valve of claim 1, wherein: the right side of second standing groove (7) is provided with damping spring (14), the right side of damping spring (14) and the left side contact of second disk seat (8), damping spring (14)'s material is made for the plastics material, the equal fixedly connected with stopper (15) in top and the bottom of second disk seat (8), spout (16) with stopper (15) sliding connection are seted up on the right side of second valve body (2).

3. The novel ultra-low temperature ball valve of claim 1, wherein: the left side fixedly connected with triangle ring pad (17) of shock attenuation sealing ring (13), triangle ring pad (17) have set gradually two from outer to interior, and two triangle ring pads (17) cross sectional areas are the same, triangle annular (18) with triangle ring pad (17) interference fit are seted up on the right side of first disk seat (6), triangle ring pad (17) and shock attenuation sealing ring (13) are pps material and make.

4. The novel ultra-low temperature ball valve of claim 1, wherein: the combined sealing element (11) comprises an inclined sealing ring (111) and a flat sealing ring (112), the inner side of the sealing cap (9) is fixedly connected with a pressing block (19), the bottom of the pressing block (19) is fixedly connected with a pressing ring (20), and the bottom of the pressing ring (20) is in contact with the top of the inclined sealing ring (111).

5. The novel ultra-low temperature ball valve of claim 1, wherein: the top of first valve body (1) is seted up with the thread groove (21) of the bottom threaded connection of sealed cap (9), the bottom fixedly connected with of thread groove (21) inner wall seals up pad (22), the top of sealed pad (22) and the sealed cooperation in bottom of sealed cap (9).

6. The novel ultra-low temperature ball valve of claim 1, wherein: second seal groove (23) have been seted up in the left side of first valve body (1), the right side fixedly connected with of second valve body (2) seals complex second sealing washer (24) with second seal groove (23).

7. The novel ultra-low temperature ball valve of claim 1, wherein: a sealing device is arranged between the contact surfaces of the first valve body (1) and the second valve body (2), the sealing device comprises an elastic sealing ring (251), a third sealing groove (252) and lubricating grease (253), the elastic sealing ring (251) is arranged in the third sealing groove (252), the third sealing groove (252) is arranged on the contact surface of the second valve body (2) and the first valve body (1), and the lubricating grease (253) is arranged between the elastic sealing ring (251) and the first valve body (1); the elastic sealing ring (251) is a Z-shaped elastic sealing ring and comprises a first sealing lip (2510), a second sealing lip (2511) and a first sealing ring bottom (2512), the first sealing lip (2510) and the second sealing lip (2511) are positioned on two sides of the upper end of the first sealing ring bottom (2512) and form lip grooves, and the lubricating grease (253) is coated in the lip grooves of the Z-shaped elastic sealing ring; the first sealing lip (2510) and the second sealing lip (2511) are respectively aligned with the left end face and the right end face of the first sealing ring bottom (2512), the first sealing lip (2510) and the second sealing lip (2511) are adjacent to and collinear with the upper bottom face of the first sealing ring bottom (2512), the sections of the first sealing lip (2510) and the second sealing lip (2511) are rectangular, and the upper bottom edges of the first sealing lip (2510) and the second sealing lip (2511) are circular arcs (254); the section of the first sealing ring bottom (2512) is rectangular, two triangular grooves (255) are formed in two side edges of the first sealing ring bottom (2512), and the two triangular grooves (255) are located at 1/3 and 2/3 of the two side edges of the first sealing ring bottom (2512) respectively.

8. The novel ultra-low temperature ball valve of claim 7, wherein: each triangular groove (255) is an isosceles triangle, the angle of the vertex angle is set to be 25-40 degrees, and the vertex angle can also be rounded.

9. the novel ultra-low temperature ball valve of claim 8, wherein: a resetting device is arranged between the first sealing ring bottom (2512) and the third sealing groove (252), the resetting device comprises a mounting sleeve (261), an end plate (262), a sliding block (263), an end cover (264) and a resetting spring (265), the end plate (262) is fixedly connected to the end surface of one end of the mounting sleeve (261), an opening (2621) is formed in the position, corresponding to one end of the mounting sleeve (261), on the end plate (262), the end cover (264) is arranged on the end surface of the other end of the mounting sleeve (261), a first mounting groove (2641) communicated with the mounting sleeve (261) is formed in the end cover (264), the sliding block (263) is slidably arranged in the mounting sleeve (261), the sliding block (263) is located between the end plate (262) and the end cover (264), and a boss (2631) is arranged on the surface, close to the opening (2621), of the sliding block (263), the orthographic projection of the boss (2631) on the plane where the end plate (262) is located in the opening (2621), the orthographic projection of the sliding block (263) on the plane where the end plate (262) is located is at least partially located outside the opening (2621), a second installation groove (2632) is arranged at the middle position of one face, facing the end cover (264), of the sliding block (263, and the return spring (265) is arranged in the installation sleeve (261) and two ends of the return spring are located between the first installation groove (2641) and the second installation groove (2632).