Double-seal pneumatic track ball valve

Abstract

The invention provides a double-seal pneumatic track ball valve, which relates to the technical field of ball valves, and comprises a valve shell, a bevel gear is sleeved on the protruding part of the head end of a driving shaft sleeve, a threaded propelling shaft is installed on the driving shaft sleeve in a penetrating and screwing manner, and a triangular driving block is rotatably installed at one end, inserted into a positioning piece, of the threaded propelling shaft; the triangular driving block is in sliding fit with the sliding groove. A water passing pipe is slidably mounted in the horizontal water passing pipe, an annular driving groove with the section of a trapezoidal structure is formed in the middle of the periphery of the water passing pipe, and when the triangular driving block slides towards the water passing pipe, the inclined face abuts against and makes contact with the inclined cutting annular face of the annular driving groove. And a sealing ring is embedded in a sinking groove in the head end of the water passing pipe. The annular driving assembly can be directly rotated outside the horizontal water passing pipe to press and seal the abraded sealing ring again, compared with the prior art, the trouble that the abraded sealing ring needs to be frequently taken out of the valve to be replaced can be omitted, and operation is convenient and fast.

Description

Technical Field

[0001] The invention relates to the technical field of ball valves, and in particular to a double-sealed pneumatic track ball valve. Background Art

[0002] Double seal pneumatic track ball valves play an important role in the chemical, petroleum, natural gas, electric power and other industries due to their unique advantages. In practical applications, there are some problems that need to be solved in traditional double seal pneumatic track ball valves as follows: Most of the existing pneumatic track ball valves lack a mechanism that can directly re-press and seal the worn sealing ring on the outside of the valve. As a result, the worn sealing ring needs to be frequently removed from the valve for disassembly and replacement, which is a cumbersome operation and increases the consumption of the sealing ring, as well as the workload and cost of maintaining the long-term sealing of the valve. Summary of the invention

[0003] In view of this, the present invention provides a double-seal pneumatic track ball valve to solve the problem of not being conducive to reducing the workload and cost generated by the valve to maintain its long-term sealing performance.

[0004] The technical solution proposed by the present invention is: a double-seal pneumatic track ball valve, specifically comprising a valve housing, wherein the valve housing as a whole is composed of a vertical valve pipe and two horizontal water pipes symmetrically welded to the vertical valve pipe; A spherical valve core is rotatably arranged at the inner center position of the valve shell; four positioning pieces are welded around the outer periphery of the horizontal water-passing pipe, the positioning piece is composed of a rectangular block and a slide groove opened inside the rectangular block, a driving shaft sleeve is rotatably installed on the head end sealing part of the positioning piece, a bevel gear is mounted on the head end protruding part of the driving shaft sleeve, a threaded propulsion shaft is threadedly installed on the driving shaft sleeve, a triangular driving block is rotatably installed on one end of the threaded propulsion shaft inserted into the positioning piece, and the triangular driving block is slidably matched with the slide groove; a water pipe is slidably installed inside the horizontal water-passing pipe, an annular driving groove with a trapezoidal cross-section is opened in the middle part of the outer periphery of the water pipe, and the inclined surface of the triangular driving block is in contact with the oblique section of the annular driving groove when the triangular driving block slides toward the water pipe; a sealing ring is embedded in the sink groove at the head end of the water pipe, and the sealing ring is sealed with the top pressure of the spherical valve core.

[0005] Furthermore, an annular drive assembly is rotatably arranged on the horizontal water pipe, and the annular drive assembly is composed of a conical gear ring and a rotating ring embedded in an inner and outer sleeve, and six connecting short plates welded between the two. The conical gear ring is meshed with the conical gear for transmission, and the rotating ring rotates in coordination with the outer periphery of the horizontal water pipe.

[0006] Furthermore, the outer circumference of the rotating circle is rotatably connected with three arc-shaped handle bars, and the peripheral wall of the conical gear ring is circumferentially penetrated with three strip-shaped arc-shaped grooves adapted to the three arc-shaped handle bars; Spur gears are welded to the tail ends of the three arc-shaped handlebars, and a spur gear ring is installed on the outer periphery of the rotating circle. Three rows of gear plates are arranged around the outer periphery of the spur gear ring. The three spur gears are meshed with the three rows of gear plates correspondingly, and the rotating circle is cooperated with the connecting short plate.

[0007] Furthermore, a tension spring is connected between the spur gear ring and a connecting short plate; A blocking rod is welded inside the head end portion of the strip-shaped arc groove, and when the arc-shaped handle bar is built in and hidden in the strip-shaped arc groove, the head end portion abuts against the blocking rod.

[0008] Furthermore, two sets of spaced sealing rings are nested and installed at positions on both sides of the annular driving groove on the outer circumference of the water pipe, and the two sets of sealing rings are squeezed and sealed with the inner circumference of the horizontal water pipe, and the tail end of the water pipe protrudes from the horizontal water pipe by a small distance; The head end of the horizontal water pipe is fixedly connected with a short connecting pipe, the inner diameter of the short connecting pipe is smaller than the water pipe and is in contact with the tail end of the water pipe.

[0009] Furthermore, the top sealing plug of the vertical valve tube is covered with a cover plate, a valve shaft is rotatably installed through the center of the cover plate, the bottom end of the valve shaft is fixedly connected to the spherical valve core, and the part of the valve shaft above the cover plate is a hexagonal structure; A circle of vertical support shafts is welded around the top of the cover plate and located outside the valve shaft. The top parts of the two symmetrically arranged vertical support shafts are penetrated by guide bolts that are screwed and installed.

[0010] Furthermore, a mounting ring is welded to the top of a circle of vertical support shafts, a cylinder is fixedly mounted to the top of the mounting ring, two piston plates spaced apart from each other are slidably mounted inside the cylinder, a piston rod is welded to the center of the two piston plates, the piston rod and the bottom plate of the cylinder are slidably fitted, and the cylinder is connected to an external high-pressure gas source.

[0011] Furthermore, a hexagonal transmission hole is provided inside the lower half of the piston rod, and the hexagonal transmission hole is slidably matched with the hexagonal part of the valve shaft.

[0012] Furthermore, two spiral driving grooves are symmetrically opened on the outer circumference of the lower half of the piston rod, and the head ends of the two guide bolts are correspondingly plugged into the two spiral driving grooves.

[0013] The double-seal pneumatic track ball valve provided by the present invention has the following beneficial effects: 1. Through the meshing transmission of the four bevel gears and the bevel gear ring, the rotating annular drive assembly can drive the four drive sleeves to rotate synchronously, completing the re-pressing and sealing of the worn sealing ring at one time. This can save the trouble of rotating the four drive sleeves step by step to drive the worn sealing ring to re-press and seal, which helps to improve the operating efficiency of the re-pressing and sealing of the worn sealing ring.

[0014] Second, since the threaded propulsion shafts at four locations penetrate the horizontal water pipe, and the part away from the triangular drive block protrudes from the horizontal water pipe, and the annular drive assembly is rotatably arranged on the outside of the horizontal water pipe, the annular drive assembly can be directly rotated on the outside of the horizontal water pipe to re-press and seal the worn sealing ring. Compared with the existing technology that lacks a mechanism that can directly re-press and seal the worn sealing ring on the outside of the valve, this can save the trouble of frequently taking the sealing ring out of the valve for replacement after it is worn. It is easy to operate, helps to reduce the consumption of the sealing ring and will reduce the workload and cost of the valve incurred in maintaining its long-term sealing.

[0015] 3. The three arc-shaped handles are hidden in the three strip arc-shaped grooves when idle, so that they can avoid protruding from the annular drive assembly for a long time, reduce the support space occupied by them when idle, and help to miniaturize the overall volume of the valve; through the meshing transmission of the three spur gears and the spur gear rings, any arc-shaped handle that swings inward or outward in the strip arc-shaped groove can drive the other two arc-shaped handles to swing inward or outward synchronously, which can save the trouble of switching the use status of the three arc-shaped handles in steps before and after using them, and help to improve the operating efficiency of the three arc-shaped handles.

[0016] Fourth, the two sets of sealing rings can not only directly seal the sliding gap between the water pipe and the horizontal water pipe, but also indirectly seal the rotating gap between the drive shaft sleeve and the positioning piece and between the threaded propulsion shaft and the drive shaft sleeve, which has the effect of using one device for two purposes. This can avoid the need to configure sealing rings for the above two gaps respectively, reduce the number of sealing rings to be set, and help to simplify the valve structure and reduce the cost of the valve to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0018] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached picture: Figure 1 The overall structural diagram of the present invention is shown; Figure 2 The overall bottom side structure schematic diagram of the present invention is shown; Figure 3 A schematic diagram of the half-section internal structure of the horizontal water pipe and the vertical valve pipe of the present invention is shown; Figure 4 A schematic diagram showing the installation position of the spherical valve core in the present invention is shown; Figure 5A schematic diagram showing a disassembled state of the annular drive assembly in the present invention is shown; Figure 6 A schematic diagram of the structure of the annular drive assembly in the present invention is shown; Figure 7 A schematic diagram of a bottom side view of the annular drive assembly in the present invention is shown; Figure 8 A schematic diagram showing a disassembled state of the spur gear ring in the present invention is shown; Fig. 9 A schematic diagram of the inner structure of a cylinder in a half-section of the present invention is shown; Fig.10 A schematic diagram of the half-section structure of the piston rod in the present invention is shown.

[0020] List of reference numerals: 1. Valve housing; 101. Horizontal water pipe; 1011. Positioning piece; 1012. Drive sleeve; 1013. Conical gear; 1014. Slide; 102. Vertical valve pipe; 1021. Cover plate; 103. Threaded propulsion shaft; 1031. Triangular drive block; 104. Valve shaft; 105. Vertical support shaft; 1051. Guide bolt; 106. Mounting ring; 107. Ball valve core; 2. Short pipe connection; 3. Annular drive assembly; 301. Conical gear ring; 302. Rotating circle; 303. Connecting short plate; 3031. Strip arc groove; 3032. Block rod; 304. Arc handle; 3041. Spur gear; 305. Spur gear ring; 306. Tension spring; 4. Cylinder; 5. Piston plate; 501. Piston rod; 5011. Spiral drive groove; 5012. Hexagonal transmission hole; 6. Water pipe; 601. Sealing ring; 602. Sealing ring; 603. Annular driving groove. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0022] The following is an embodiment of the present invention, please refer to Figures 1 to 10 : The present invention proposes a double-seal pneumatic track ball valve, comprising a valve housing 1, wherein the valve housing 1 as a whole is composed of a vertical valve pipe 102 and two horizontal water pipes 101 symmetrically welded to the vertical valve pipe 102; The inner center of the valve housing 1 is rotatably provided with a spherical valve core 107; the outer periphery of the horizontal water pipe 101 is welded with four positioning members 1011, and the positioning member 1011 is composed of a rectangular block and a slide groove 1014 opened inside the rectangular block (such as Figure 5 As shown in the figure, the blocking part of the head end of the positioning member 1011 is penetrated and rotatably installed with a driving sleeve 1012, and the protruding part of the head end of the driving sleeve 1012 is sleeved with a bevel gear 1013, and a threaded propulsion shaft 103 is screwed and installed on the driving sleeve 1012, and one end of the threaded propulsion shaft 103 is inserted into the positioning member 1011 and rotatably installed with a triangular driving block 1031, and the triangular driving block 1031 is slidably matched with the slide groove 1014; a water pipe 6 is slidably installed inside the horizontal water pipe 101, and an annular driving groove 603 with a trapezoidal cross-section is provided in the middle part of the outer periphery of the water pipe 6, and when the triangular driving block 1031 slides toward the water pipe 6, the inclined surface abuts against the oblique section of the annular driving groove 603; a sealing ring 602 is embedded in the sink groove at the head end of the water pipe 6, and the sealing ring 602 is pressed and sealed with the spherical valve core 107.

[0023] Preferably, the horizontal water pipe 101 is rotatably provided with an annular driving assembly 3, which is composed of a conical gear ring 301 and a rotating ring 302 which are arranged inside and outside the inner and outer sleeves, and six connecting short plates 303 which are welded between the two. Figure 8 As shown in the figure, the rotating circle 302 is meshed with the bevel gear 1013 for transmission, and the rotating circle 302 is matched with the outer periphery of the horizontal water pipe 101 for rotation.

[0024] Preferably, the outer periphery of the rotating circle 302 is rotatably connected with three arc-shaped handle bars 304, and three strip-shaped arc-shaped grooves 3031 matching the three arc-shaped handle bars 304 are arranged on the peripheral wall of the conical gear ring 301; the tail ends of the three arc-shaped handle bars 304 are welded with spur gears 3041, and the outer periphery of the rotating circle 302 is rotatably fitted with a spur gear ring 305, and the outer periphery of the spur gear ring 305 is arranged with three rows of teeth, and the three spur gears 3041 are correspondingly meshed with the three rows of teeth, and the rotating circle 302 is penetrated and matched with the connecting short plate 303.

[0025] Preferably, a tension spring 306 is connected between the spur gear ring 305 and a connecting short plate 303; a blocking rod 3032 is welded on the inner side of the head end portion of the strip arc groove 3031, and the head end portion of the arc handle 304 is in contact with the blocking rod 3032 when it is built into and hidden in the strip arc groove 3031.

[0026] Preferably, two sets of spaced-apart sealing rings 601 (such as Figure 4As shown), two sets of sealing rings 601 are squeezed and sealed with the inner circumference of the horizontal water pipe 101, and the tail end of the water pipe 6 protrudes from the horizontal water pipe 101 by a small distance; the head end of the horizontal water pipe 101 is fixedly connected with a short pipe 2, the inner diameter of the short pipe 2 is smaller than the water pipe 6 and is in contact with the tail end of the water pipe 6.

[0027] Preferably, the top sealing plug of the vertical valve tube 102 is covered with a cover plate 1021, and the valve shaft 104 is rotatably installed through the center position of the cover plate 1021. The bottom end of the valve shaft 104 is fixedly connected to the spherical valve core 107, and the part of the valve shaft 104 located above the cover plate 1021 has a hexagonal structure; the part of the top end of the cover plate 1021 located on the periphery of the valve shaft 104 is welded with a circle of vertical support shafts 105, and the top parts of the two symmetrically arranged vertical support shafts 105 are penetrated by guide bolts 1051 that are screwed and installed.

[0028] Preferably, the top ends of the vertical support shafts 105 are welded with a mounting ring 106 (such as Fig. 9 As shown), a cylinder 4 is fixedly mounted on the top of the mounting ring 106, and two piston plates 5 are slidably mounted inside the cylinder 4 and spaced apart from each other. A piston rod 501 is welded together at the centers of the two piston plates 5, and the piston rod 501 penetrates and slides with the bottom plate of the cylinder 4, and the cylinder 4 is externally connected to a high-pressure gas source.

[0029] Preferably, a hexagonal transmission hole 5012 is opened inside the lower half of the piston rod 501, and the hexagonal transmission hole 5012 slides with the hexagonal part of the valve shaft 104; two spiral drive grooves 5011 are symmetrically opened on the outer periphery of the lower half of the piston rod 501, and the head ends of the two guide bolts 1051 are plug-fitted with the two spiral drive grooves 5011.

[0030] When the arc handle 304 is built into the strip arc groove 3031, a finger groove is formed between the head end portion and the head end of the strip arc groove 3031, through which the arc handle 304 can be conveniently swung and pulled out of the strip arc groove 3031 for use.

[0031] The specific details, implementation steps, functions and interrelationships of the above contents, and their roles in implementing the present invention are described and explained in detail below: Since the tail end of the water pipe 6 protrudes a small distance from the horizontal water pipe 101, and the inner diameter of the short connecting pipe 2 is smaller than the water pipe 6, when the two short connecting pipes 2 are connected and fixed to the two horizontal water pipes 101, the two short connecting pipes 2 can be in contact with the two water pipes 6 and push the two water pipes 6 toward the spherical valve core 107, so that the two sealing rings 602 are pressed against the spherical surface of the spherical valve core 107, and the gap between the spherical valve core 107 and the head ends of the two short connecting pipes 2 is sealed. This can prevent water from leaking through the above gap when the spherical valve core 107 rotates to close the valve, thereby affecting the closing sealing of the valve; the two sealing rings 602 can realize two-way sealing of the valve, so that the valve can be used for blocking and intercepting two-way water flow.

[0032] During the frequent rotation and opening and closing process of the spherical valve core 107, excessive wear will be caused to the two sealing rings 602. After the two sealing rings 602 are excessively worn, the sealing performance of the spherical valve core 107 when closed will be affected; through the guiding effect when the inclined surfaces of the four triangular drive blocks 1031 are in contact with the oblique annular surfaces of the annular drive groove 603, the synchronously rotating driving sleeves 1012 at the four sides can push and drive the four threaded propulsion shafts 103 and the four triangular drive blocks 1031 to slide toward the annular drive groove 603 at the same time, and push and drive the water pipe 6 to slide toward the spherical valve core 107, so that the sealing ring 602 that has a gap with the spherical valve core 107 after wear is pressed and sealed on the spherical valve core 107 again, which can deal with the above-mentioned poor sealing conditions and maintain the sealing performance of the valve during long-term use.

[0033] Through the meshing transmission of the four bevel gears 1013 and the bevel gear ring 301, the rotating annular drive assembly 3 can drive the four drive sleeves 1012 to rotate synchronously, and complete the re-pressing and sealing of the worn sealing ring 602 at one time. This can save the trouble of rotating the four drive sleeves 1012 in steps to drive the worn sealing ring 602 to re-press and seal, which helps to improve the operating efficiency of the re-pressing and sealing of the worn sealing ring 602; because the four threaded propulsion shafts 103 and the horizontal water pipe 101 are intersected, the part away from the triangular drive block 1031 protrudes from the horizontal water pipe 101, and the annular drive assembly 3 is rotatably arranged on the outside of the horizontal water pipe 101, and then the annular drive assembly 3 can be directly rotated on the outside of the horizontal water pipe 101 to re-press and seal the worn sealing ring 602. Compared with the existing technology that lacks a mechanism that can directly re-press and seal the worn sealing ring 602 on the outside of the valve, this can save the trouble of frequently taking the sealing ring 602 out of the valve for replacement after it is worn, is easy to operate, helps to reduce the consumption of the sealing ring 602, and will reduce the workload and cost of the valve incurred in maintaining its long-term sealing.

[0034] The annular drive assembly 3 can be twisted and driven by three arc-shaped handles 304. When in use, the three arc-shaped handles 304 need to be swung out of the three strip-shaped arc-shaped grooves 3031. The three arc-shaped handles 304 can apply force and twist drive to the annular drive assembly 3, making the re-pressing and sealing operation of the worn sealing ring 602 more labor-saving and convenient.

[0035] The three arc-shaped handles 304 are hidden in the three strip-shaped arc-shaped grooves 3031 when idle, which can prevent them from protruding from the annular drive assembly 3 for a long time, reduce the support space occupied by them in the idle state, and help to miniaturize the overall volume of the valve.

[0036] Through the meshing transmission of the three spur gears 3041 and the spur gear ring 305, any one of the arc handles 304 that swings inward or outward in the strip arc groove 3031 can drive the other two arc handles 304 to swing inward or outward synchronously. This can save the trouble of switching the use status of the three arc handles 304 in steps before and after using the three arc handles 304, which helps to improve the operational efficiency of the three arc handles 304; the tension spring 306 can pull and drive the spur gear ring 305 to reverse and return to its original position, control the three arc handles 304 to swing inward and return to the three strip arc grooves 3031, and position and maintain the three arc handles 304 in the three strip arc grooves 3031.

[0037] The two groups of sealing rings 601 are arranged on both sides of the annular driving groove 603, and can seal the sliding gap between the water pipe 6 and the horizontal water pipe 101, so as to prevent the water in the short pipe 2 from directly leaking into the vertical valve pipe 102 through the above sliding gap or indirectly leaking out through the annular driving groove 603, the sliding groove 1014, the driving sleeve 1012 and the positioning piece 1011, and the rotating gap between the threaded propulsion shaft 103 and the driving sleeve 1012. In this way, the two groups of sealing rings 601 can not only directly seal the sliding gap between the water pipe 6 and the horizontal water pipe 101, but also indirectly seal the rotating gap between the driving sleeve 1012 and the positioning piece 1011, and the rotating gap between the threaded propulsion shaft 103 and the driving sleeve 1012, so as to have the effect of using one device for two purposes, which can avoid the need to configure sealing rings 601 for the above two gaps respectively, reduce the number of sealing rings 601 set, and help to simplify the valve structure and reduce the cost of the valve to a certain extent.

[0038] The working principle of this embodiment: The steps of opening the valve are as follows: first, the two piston plates 5 and the piston rod 501 are driven to slide downward by the external high-pressure gas source, and then the piston rod 501 is driven downward by the spiral guide effect generated by the two spiral drive grooves 5011 and the two guide bolts 1051, and can be twisted and driven to drive the valve shaft 104 and the spherical valve core 107 to twist together. When the water hole through the spherical valve core 107 is twisted and driven to a state of being coaxially aligned with the two water pipes 6, the horizontal water pipe 101 is connected and the valve is opened; The closing steps of the valve are as follows: first, the two piston plates 5 and the piston rod 501 are driven to slide upward by the external high-pressure air source, and then the piston rod 501 is driven to slide upward by the spiral guiding effect produced by the two spiral driving grooves 5011 and the two guide bolts 1051, and the valve shaft 104 and the spherical valve core 107 are driven to rotate and reset together. When the water hole through the spherical valve core 107 is rotated to a state completely separated from the head end openings of the two water pipes 6, the spherical surface of the solid part thereof is rotated to seal the head end openings of the two water pipes 6 and is sealed by the two sealing rings 602. At this time, the conduction path between the horizontal water pipes 101 is cut off and the valve is closed.

[0039] In this article, there are a few points to note: 1. The drawings of the embodiments of the present invention only involve structures related to the embodiments of the present invention, and other structures can refer to the general design.

[0040] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0041] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A double-seal pneumatic track ball valve, comprising a valve housing (1), wherein the valve housing (1) as a whole is composed of a vertical valve pipe (102) and two horizontal water pipes (101) symmetrically welded to the vertical valve pipe (102); It is characterized in that A spherical valve core (107) is rotatably provided at the inner center of the valve housing (1); four positioning members (1011) are welded around the outer periphery of the horizontal water pipe (101); the positioning member (1011) is composed of a rectangular block and a slide groove (1014) provided inside the rectangular block; a driving shaft sleeve (1012) is rotatably installed through a blocking portion at the head end of the positioning member (1011); a bevel gear (1013) is sleeved on a protruding portion at the head end of the driving shaft sleeve (1012); a threaded propulsion shaft (103) is threadedly installed on the driving shaft sleeve (1012); the threaded propulsion shaft (103) is inserted into the positioning member (1011) and is rotatably installed. A triangular driving block (1031) is rotatably mounted at one end of the interior of the horizontal water pipe (1011), and the triangular driving block (1031) is slidably matched with the slide groove (1014); a water pipe (6) is slidably mounted inside the horizontal water pipe (101), and an annular driving groove (603) with a trapezoidal cross-section is provided in the middle portion of the outer circumference of the water pipe (6), and when the triangular driving block (1031) slides toward the water pipe (6), the inclined surface abuts against the oblique cross-section annular surface of the annular driving groove (603); a sealing ring (602) is embedded in the sink groove at the head end of the water pipe (6), and the sealing ring (602) is pressed and sealed with the spherical valve core (107).

2. A double-seal pneumatic track ball valve according to claim 1, characterized in that: An annular driving assembly (3) is rotatably arranged on the horizontal water pipe (101), and the annular driving assembly (3) is composed of a conical gear ring (301) and a rotating ring (302) which are arranged inside and outside the water pipe, and six connecting short plates (303) welded between the two. The conical gear ring (301) is meshed with the conical gear (1013) for transmission, and the rotating ring (302) is rotatably matched with the outer circumference of the horizontal water pipe (101).

3. A double-seal pneumatic track ball valve according to claim 2, characterized in that: The outer circumference of the rotating ring (302) is rotatably connected to three arc-shaped handle bars (304); and the peripheral wall of the conical gear ring (301) is provided with three strip-shaped arc-shaped grooves (3031) adapted to the three arc-shaped handle bars (304); The tail ends of the three arc-shaped handlebars (304) are all welded with spur gears (3041), the outer periphery of the rotating circle (302) is rotatably sleeved with a spur gear ring (305), the outer periphery of the spur gear ring (305) is surrounded by three rows of tooth plates, the three spur gears (3041) are correspondingly meshed with the three rows of tooth plates, and the rotating circle (302) is interlocked with the connecting short plate (303).

4. A double-seal pneumatic track ball valve according to claim 3, characterized in that: A tension spring (306) is connected between the spur gear ring (305) and a connecting short plate (303); A blocking rod (3032) is welded to the inner side of the head end portion of the strip-shaped arc groove (3031), and when the arc-shaped handle bar (304) is built and hidden in the strip-shaped arc groove (3031), the head end portion abuts against the blocking rod (3032).

5. A double-seal pneumatic track ball valve according to claim 1, characterized in that: Two sets of spaced-apart sealing rings (601) are nested and installed on the outer circumference of the water pipe (6) at positions on both sides of the annular driving groove (603). The two sets of sealing rings (601) are squeezed and sealed with the inner circumference of the horizontal water pipe (101). The tail end of the water pipe (6) protrudes from the horizontal water pipe (101) by a small distance. The head end of the horizontal water pipe (101) is fixedly connected to a short pipe (2); the inner diameter of the short pipe (2) is smaller than that of the water pipe (6) and is in abutment with the tail end of the water pipe (6).

6. A double-seal pneumatic track ball valve according to claim 1, characterized in that: The top end of the vertical valve tube (102) is sealed with a cover plate (1021), a valve shaft (104) is rotatably installed through the center of the cover plate (1021), the bottom end of the valve shaft (104) is fixedly connected to the spherical valve core (107), and the portion of the valve shaft (104) located above the cover plate (1021) is in a hexagonal structure; A circle of vertical support shafts (105) is welded around the top of the cover plate (1021) located outside the valve shaft (104), and guide bolts (1051) are screwed and installed through the top parts of the two symmetrically arranged vertical support shafts (105).

7. A double-seal pneumatic track ball valve according to claim 6, characterized in that: A mounting ring (106) is welded to the top of a circle of vertical support shafts (105), a cylinder (4) is fixedly mounted to the top of the mounting ring (106), two piston plates (5) are slidably mounted inside the cylinder (4) and are arranged at an interval up and down, a piston rod (501) is welded to the center of the two piston plates (5), the piston rod (501) penetrates and slides with the bottom plate of the cylinder (4), and the cylinder (4) is externally connected to a high-pressure gas source.

8. A double-seal pneumatic track ball valve according to claim 7, characterized in that: A hexagonal transmission hole (5012) is provided inside the lower half of the piston rod (501), and the hexagonal transmission hole (5012) is slidably matched with the hexagonal portion of the valve shaft (104).

9. A double-seal pneumatic track ball valve according to claim 7, characterized in that: Two spiral drive grooves (5011) are symmetrically formed on the outer circumference of the lower half of the piston rod (501), and the head ends of the two guide bolts (1051) are correspondingly plugged into the two spiral drive grooves (5011).

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