Ultralow-temperature ball valve

Abstract

The ultralow-temperature ball valve comprises a valve body and a core body, the core body is installed on the valve body, the core body comprises a sealing structure and a valve element, the sealing structure is installed between the valve element and the valve body, and the sealing structure comprises a first sealing plate and a second sealing plate; the first sealing plate and the second sealing plate wrap the upper portion and the lower portion of the valve element respectively, the sealing gaskets are installed between the first sealing plate and the valve element and between the second sealing plate and the valve element, the sealing gaskets are fixedly installed on the first sealing plate and the second sealing plate, and the first sealing plate and the second sealing plate are connected through the connecting rod. The first sealing plate and the second sealing plate can be fixedly connected through the connecting rod, so that the first sealing plate and the second sealing plate can move synchronously, the first sealing plate, the second sealing plate and the valve element can rotate, and the first sealing plate, the second sealing plate and the valve element move reversely by applying external force; the valve element can be conveniently driven under the influence of ultralow temperature.

Description

Technical Field

[0001] The invention relates to the field of valve bodies, and in particular to an ultra-low temperature ball valve. Background Art

[0002] Valves suitable for medium temperatures below -150°C are called ultra-low temperature valves. Ultra-low temperature valves include ultra-low temperature ball valves, ultra-low temperature gate valves, ultra-low temperature safety valves, ultra-low temperature check valves, etc.

[0003] For the ultra-low temperature ball valve, it includes a valve body, a ball, a valve stem, a valve cover and a handwheel; the valve body includes a valve seat and two support rings, the ball is installed in the valve seat, the two support rings are respectively against the two sides of the ball, and the support rings are clamped between the ball and the valve seat; fluid channels are opened inside the ball and inside the valve seat; the valve cover includes a sealing ring and a tube body detachably connected to the sealing ring, the sealing ring is detachably connected to the valve seat and covers the ball; the valve stem is inserted and rotatably connected to the tube body, one end of the valve stem is connected to the ball, and the other end is connected to the handwheel, which is installed at the end of the tube body away from the valve body. When in use, turning the handwheel can control the rotation of the valve stem, and then control the rotation of the ball, thereby controlling the connection state between the fluid channel inside the ball and the fluid channel inside the valve seat, thereby achieving the effect of controlling the flow rate of the internal medium.

[0004] In a Chinese patent, patent number (CN115681544A) introduces an ultra-low temperature ball valve, which includes a valve body and a ball. The ball is arranged in the valve body. An active valve stem is fixedly connected to the upper end of the ball, and a driven valve stem is fixedly connected to the lower end of the ball. The active valve stem and the driven valve stem are both rotatably connected to the valve body. A limit disk is fixedly connected to the active valve stem and the driven valve stem, and a limit rod is fixedly connected to the lower side of the limit disk. A limit seat is arranged on the outer periphery of the active valve stem and the driven valve stem, and the limit seat is fixedly connected to the inner wall of the valve body. A limit groove is arranged on the limit seat, and the limit rod is slidably connected to the limit groove. However, technicians in this field have found in actual operation that in an ultra-low temperature environment, the ball is easily locked due to the influence of the low temperature, resulting in the inability to drive the valve stem, and the valve stem is easily broken when too much force is applied. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides an ultra-low temperature ball valve, which can use a connecting rod to fix the first sealing plate and the second sealing plate to enable the first sealing plate and the second sealing plate to move synchronously, and the first sealing plate and the second sealing plate and the valve core can all rotate. By applying external force, the first sealing plate and the second sealing plate and the valve core can move in the opposite direction, which can facilitate the driving of the valve core under the influence of ultra-low temperature.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an ultra-low temperature ball valve includes a valve body and a core body, the core body is installed on the valve body, the core body includes a sealing structure and a valve core, the sealing structure is installed between the valve core and the valve body, the sealing structure includes a first sealing plate and a second sealing plate, the first sealing plate and the second sealing plate are respectively wrapped around the upper and lower parts of the valve core, a sealing gasket is installed between the first sealing plate and the second sealing plate and the valve core, the sealing gasket is fixedly installed on the first sealing plate and the second sealing plate, and the first sealing plate and the second sealing plate are connected by a connecting rod.

[0007] As a preferred technical solution of an ultra-low temperature ball valve of the present invention, the valve core includes a ball, and the ball is installed between a first sealing plate and a second sealing plate. The upper end of the ball extends to the outside of the first sealing plate through an extension rod, and a first annular groove is provided on the extension rod, and teeth are provided on the first annular groove. An extension sleeve is provided on the first sealing plate, and a second annular groove is provided on the extension sleeve, and teeth are provided on the second annular groove. Gears respectively connected to the first annular groove and the second annular groove are installed between the first annular groove and the second annular groove.

[0008] As a preferred technical solution for an ultra-low temperature ball valve of the present invention, a first bevel gear is provided at the end of the extension rod away from the sphere, the first bevel gear is meshed with the second bevel gear through teeth, the second bevel gear is installed with a driving handle through a connecting shaft, the connecting shaft of the second bevel gear is installed on a protective sleeve through a bearing, and the protective sleeve is fixedly installed on the valve body.

[0009] As a preferred technical solution of an ultra-low temperature ball valve of the present invention, the valve body includes a valve body main body, and the two ends of the valve body main body are respectively connected with a liquid inlet pipe and a liquid outlet pipe, and the ends of the liquid inlet pipe and the liquid outlet pipe away from the valve body are provided with flanges, and a sealing ring is installed on the flange, and a pressure relief port is provided on the liquid outlet pipe, and a pressure relief structure is installed on the liquid outlet pipe through the pressure relief port.

[0010] As a preferred technical solution of an ultra-low temperature ball valve of the present invention, the pressure relief structure includes a pressure relief pipe, the pressure relief pipe includes a one-way valve installed on the pressure relief port, and a pipe body is installed at one end of the one-way valve away from the pressure relief port.

[0011] As a preferred technical solution of the ultra-low temperature ball valve of the present invention, a mounting frame is provided on the tube body, a push rod is threadedly mounted on the mounting frame, and the push rod is in contact with the valve core of the one-way valve.

[0012] As a preferred technical solution of the ultra-low temperature ball valve of the present invention, a switch is provided on the liquid outlet pipe, and the switch includes a baffle, and a handle for driving the baffle is installed on the baffle.

[0013] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0014] 1. The first sealing plate and the second sealing plate can be fixedly connected by a connecting rod, so that the first sealing plate and the second sealing plate can move synchronously, and the first sealing plate, the second sealing plate and the valve core can all rotate. By applying an external force, the first sealing plate and the second sealing plate and the valve core move in the opposite direction, which can facilitate the driving of the valve core under the influence of ultra-low temperature;

[0015] 2. The gear can be used to drive the extension sleeve to rotate when the extension rod rotates, so that the first sealing plate, the second sealing plate and the ball can be driven to rotate simultaneously by applying a single torque;

[0016] 3. The end of the pipe body away from the one-way valve can be installed on the main pipeline through a connecting pipe. When the main pipeline has problems such as breakage or leakage, the faulty pipe body can be short-circuited through the pipe body and the connecting pipe, which is convenient for pipeline maintenance and replacement of the main pipeline. The baffle can be controlled by rotating the handle. When problems occur in the pipeline, the baffle can block the liquid in the outlet pipe and allow the liquid to enter the pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of an ultra-low temperature ball valve of the present invention;

[0018] Figure 2 It is a schematic diagram of the overall supplementary three-dimensional structure of an ultra-low temperature ball valve of the present invention;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of a valve body of a cryogenic ball valve of the present invention;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of a core of an ultra-low temperature ball valve of the present invention;

[0021] Figure 5 It is a schematic diagram of the cross-sectional structure of a core of a cryogenic ball valve of the present invention;

[0022] Figure 6 It is a three-dimensional structural schematic diagram of a sealing structure of a cryogenic ball valve of the present invention;

[0023] Figure 7 It is a schematic cross-sectional structure diagram of a sealing structure of a cryogenic ball valve of the present invention;

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of a valve core of a cryogenic ball valve according to the present invention;

[0025] Fig. 9 It is a three-dimensional structural schematic diagram of a pressure relief structure of a cryogenic ball valve of the present invention;

[0026] Fig.10 It is a schematic cross-sectional structure diagram of a pressure relief structure of a cryogenic ball valve of the present invention;

[0027] Fig.11 The figure is a three-dimensional structural schematic diagram of a switch of an ultra-low temperature ball valve according to the present invention.

[0028] Wherein: valve body 1; valve body main body 11; liquid inlet pipe 12; flange 13; sealing ring 14; liquid outlet pipe 15; pressure relief port 16; core body 2; sealing structure 21; extension sleeve 211; first sealing plate 212; connecting rod 213; second sealing plate 214; sealing gasket 215; second annular groove 216; valve core 22; ball 221; extension rod 222; first annular groove 223; first bevel gear 224; gear 23; protective sleeve 24; second bevel gear 25; driving handle 26; pressure relief structure 3; pressure relief pipe 31; one-way valve 311; pipe body 312; mounting frame 32; push rod 33; switch 4; baffle 41; handle 42. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0030] Embodiment:

[0031] Combination Figure 1 , Figure 2 , Figure 4 , Figure 5 Figure 6 and Figure 7As shown, the present invention provides an ultra-low temperature ball valve, including a valve body 1 and a core body 2, wherein the core body 2 is installed on the valve body 1, and the valve body 1 is cast iron integrally, and the core body 2 includes a sealing structure 21 and a valve core 22, wherein the sealing structure 21 is installed between the valve core 22 and the valve body 1, and the sealing structure 21 includes a first sealing plate 212 and a second sealing plate 214, wherein the first sealing plate 212 and the second sealing plate 214 can move freely in the valve body 1, and the first sealing plate 212 and the second sealing plate 214 are respectively wrapped around the upper part and the lower part of the valve core 22, and the first sealing plate 212 and the second sealing plate 214 are between the valve core 22 and the valve core 22. A sealing gasket 215 is installed, and the sealing gasket 215 is fixedly installed on the first sealing plate 212 and the second sealing plate 214. The first sealing plate 212 and the second sealing plate 214 are connected by a connecting rod 213. The first sealing plate 212 and the second sealing plate 214 can be fixedly connected by the connecting rod 213, so that the first sealing plate 212 and the second sealing plate 214 can move synchronously. With this arrangement, the first sealing plate 212, the second sealing plate 214 and the valve core 22 can all rotate, and the first sealing plate 212 and the second sealing plate 214 can move in the opposite direction of the valve core 22 by applying external force, which can facilitate the driving of the valve core 22 under the influence of ultra-low temperature.

[0032] Combination Figure 8 As shown, the valve core 22 includes a ball 221, and the ball 221 is installed between the first sealing plate 212 and the second sealing plate 214. The upper end of the ball 221 extends to the outside of the first sealing plate 212 through an extension rod 222, and the extension rod 222 is provided with a first annular groove 223, and the first annular groove 223 is provided with teeth. The first sealing plate 212 is provided with an extension sleeve 211, and the extension sleeve 211 extends to the outside of the valve body 1. The extension sleeve 211 is provided with a second annular groove 216, and the second annular groove 216 is provided with teeth, the height and width of the first annular groove 223 and the second annular groove 216 are the same, and gears 23 respectively connected to the first annular groove 223 and the second annular groove 216 are installed between the first annular groove 223 and the second annular groove 216, and the gears 23 are provided with no less than three. When the extension rod 222 rotates, the extension sleeve 211 can be driven to rotate through the gears 23, so that the first sealing plate 212, the second sealing plate 214 and the ball 221 can be driven to rotate simultaneously by applying a single torque.

[0033] Combination Figure 4 and Figure 5As shown, to facilitate the manipulation of the ball 221, a first bevel gear 224 is provided at one end of the extension rod 222 away from the ball 221, and the first bevel gear 224 and the second bevel gear 25 are meshed through teeth. The meshing of the first bevel gear 224 and the second bevel gear 25 can change the direction of the applied force, thereby facilitating the manipulation of the ball 221, and the second bevel gear 25 is installed with a driving handle 26 through a connecting shaft, and the driving handle 26 is coaxially arranged with the second bevel gear 25, and the connecting shaft of the second bevel gear 25 is installed on a protective sleeve 24 through a bearing, and the protective sleeve 24 is fixedly installed on the valve body 1. The protective sleeve 24 can wrap the first bevel gear 224 and the second bevel gear 25 while installing the second bevel gear 25 to play a protective role.

[0034] Combination Figure 3 As shown, the valve body 1 includes a valve body 11, and the two ends of the valve body 11 are respectively connected with a liquid inlet pipe 12 and a liquid outlet pipe 15, and the ends of the liquid inlet pipe 12 and the liquid outlet pipe 15 away from the valve body 11 are provided with flanges 13, and a groove is provided in the middle position of the flange 13, and a sealing ring 14 is installed on the groove of the flange 13, and a pressure relief port 16 is provided on the liquid outlet pipe 15, and a pressure relief structure 3 is installed on the liquid outlet pipe 15 through the pressure relief port 16.

[0035] Combination Figure 3 , Fig. 9 and Fig.10 As shown, the pressure relief structure 3 includes a pressure relief pipe 31, and the pressure relief pipe 31 includes a one-way valve 311 installed on the pressure relief port 16. The one-way valve 311 can prevent the liquid in the liquid outlet pipe 15 from being discharged from the pressure relief pipe 31. The one-way valve 311 is installed with a tube body 312 at one end away from the pressure relief port 16. The one-way valve 311 can be installed on the main pipeline at one end away from the one-way valve 311 through a connecting pipe. When the main pipeline is broken, leaked, etc., the faulty tube body can be short-circuited with the connecting pipe through the tube body 312, so as to facilitate the maintenance and replacement of the pipeline in the main pipeline.

[0036] Combination Fig. 9 and Fig.10 As shown, a mounting frame 32 is provided on the tube body 312, and the mounting frame 32 is fixedly mounted on the tube body 312. A push rod 33 is threadedly mounted on the mounting frame 32, and the push rod 33 is in contact with the valve core of the one-way valve 311. By rotating the push rod 33, the push rod 33 applies thrust to the valve core, thereby allowing the liquid to flow into the tube body 312.

[0037] Combination Fig.11As shown, a switch 4 is provided on the liquid outlet pipe 15, and the switch 4 includes a baffle 41. The baffle 41 is installed in the liquid outlet pipe 15, and the baffle 41 is located between the pressure relief port 16 and the flange 13. A handle 42 for driving the baffle 41 is installed on the baffle 41. The baffle 41 is controlled by rotating the handle 42. When a problem occurs in the pipeline, the baffle 41 blocks the liquid in the liquid outlet pipe 15, allowing the liquid to enter the tube body 312.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A cryogenic ball valve, comprising a valve body (1) and a core body (2), wherein the core body (2) is mounted on the valve body (1), characterized in that: The core body (2) comprises a sealing structure (21) and a valve core (22); the sealing structure (21) is installed between the valve core (22) and the valve body (1); the sealing structure (21) comprises a first sealing plate (212) and a second sealing plate (214); the first sealing plate (212) and the second sealing plate (214) are respectively wrapped around the upper part and the lower part of the valve core (22); a sealing gasket (215) is installed between the first sealing plate (212), the second sealing plate (214) and the valve core (22); the sealing gasket (215) is fixedly installed on the first sealing plate (212) and the second sealing plate (214); the first sealing plate (212) and the second sealing plate (214) are connected to each other via a connecting rod (213).

2. The cryogenic ball valve according to claim 1, characterized in that: The valve core (22) comprises a ball (221), and the ball (221) is installed between a first sealing plate (212) and a second sealing plate (214). The upper end of the ball (221) extends to the outside of the first sealing plate (212) through an extension rod (222). The extension rod (222) is provided with a first annular groove (223), and the first annular groove (223) is provided with teeth. The first sealing plate (212) is provided with an extension sleeve (211), and the extension sleeve (211) is provided with a second annular groove (216), and the second annular groove (216) is provided with teeth. A gear (23) is installed between the first annular groove (223) and the second annular groove (216), which are respectively connected to the first annular groove (223) and the second annular groove (216).

3. The ultra-low temperature ball valve according to claim 2, characterized in that: A first bevel gear (224) is provided at one end of the extension rod (222) away from the spherical body (221); the first bevel gear (224) is meshed with a second bevel gear (25) through teeth; the second bevel gear (25) is provided with a driving handle (26) through a connecting shaft; the connecting shaft of the second bevel gear (25) is installed on a protective sleeve (24) through a bearing; and the protective sleeve (24) is fixedly installed on the valve body (1).

4. The ultra-low temperature ball valve according to claim 1, characterized in that: The valve body (1) comprises a valve body (11), the two ends of the valve body (11) are respectively connected with a liquid inlet pipe (12) and a liquid outlet pipe (15), the ends of the liquid inlet pipe (12) and the liquid outlet pipe (15) away from the valve body (11) are provided with flanges (13), a sealing ring (14) is installed on the flange (13), a pressure relief port (16) is provided on the liquid outlet pipe (15), and a pressure relief structure (3) is installed on the liquid outlet pipe (15) through the pressure relief port (16).

5. The ultra-low temperature ball valve according to claim 4, characterized in that: The pressure relief structure (3) comprises a pressure relief pipe (31), wherein the pressure relief pipe (31) comprises a one-way valve (311) installed on the pressure relief port (16), and a pipe body (312) is installed at one end of the one-way valve (311) away from the pressure relief port (16).

6. The ultra-low temperature ball valve according to claim 5, characterized in that: The tube body (312) is provided with a mounting frame (32), and a push rod (33) is threadedly mounted on the mounting frame (32), and the push rod (33) is in contact with the valve core of the one-way valve (311).

7. The ultra-low temperature ball valve according to claim 4, characterized in that: The liquid outlet pipe (15) is provided with a switch (4), the switch (4) comprises a baffle (41), and a handle (42) for driving the baffle (41) is mounted on the baffle (41).

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