Fixed ball valve with built-in valve rod anti-blow-out structure

Abstract

The invention discloses a fixed ball valve with a built-in valve rod blow-out prevention structure, and relates to the technical field of valves. The valve has the remarkable advantages of improving the sealing performance, the automatic resetting performance and the operation flexibility of the valve. The valve adopts the innovative design of double valve bodies, the rotary sealing valve core, the conical rotating shaft and the like, can effectively prevent medium leakage, and provides an automatic reset function. The reset assembly achieves accurate energy release and valve reset through a spring, a planetary gearbox and a magnetic buffering device. According to the design, the external energy demand is reduced, the maintenance cost is reduced, and higher operation flexibility and safety are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a fixed ball valve with a built-in valve stem anti-blowout structure. Background Art

[0002] In the prior art, most traditional valve designs rely on manual operation or external energy (such as hydraulic and pneumatic systems) to achieve valve closing and resetting. Especially in the application of ball valves, the operation of the valve usually requires manual rotation of the valve stem to change the position of the valve core and adjust the flow of the fluid. However, traditional ball valves do not have an automatic reset function, and the reset process often relies on external forces or requires manual intervention. Specifically, traditional ball valves often require an external power system, such as hydraulic or pneumatic drive, to reset the valve. For example, a hydraulic drive system usually generates pressure by pumping liquid to drive the movement of the valve core. However, this type of system requires a continuous energy supply. Once the external energy is interrupted or fails, the valve reset function will not work properly, affecting the stability and safety of the entire system. Summary of the invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a fixed ball valve with a built-in valve stem anti-blowout structure, comprising two symmetrically arranged valve bodies, the two valve bodies are fixedly sealed and connected as one body by a plurality of studs, a sealing oil valve core is rotatably sealed between the two valve bodies, both valve bodies are provided with a conical through hole, a conical rotating shaft is provided for the rotary seal in the conical through hole, and the conical rotating shaft rotates synchronously with the valve core; a reset assembly is also fixed on the main body of the two valve bodies, and the reset assembly includes an impeller for providing power, a A mainspring, a sliding sleeve for executing valve core rotation, wherein a second ratchet engaging disk is fixed to the bottom end of the sliding sleeve, a mainspring center sleeve is fixed to the center position of the mainspring, the mainspring center sleeve is rotatably sleeved on the outer surface of the sliding sleeve, and a first ratchet engaging disk is fixed to the bottom end of the mainspring center sleeve, the first ratchet engaging disk is also rotatably sleeved on the outer surface of the sliding sleeve, and mutually meshing pawls are arranged between the first ratchet engaging disk and the second ratchet engaging disk, for releasing the elastic potential energy stored in the mainspring to the sliding sleeve.

[0004] Preferably, a flange skirt is provided at the joint of the two valve cores, and two symmetrically arranged protective buckle flaps are buckled on the flange skirt. The bottom ends of the two protective buckle flaps are fixed as a whole in a manner that is easy to disassemble, and the top ends of the two protective buckle flaps are fixed as a whole to the valve body in a manner that is easy to disassemble.

[0005] Preferably, the reset assembly also includes a convenient disassembly plate fixed on the two valve body bodies, the convenient disassembly plate and the valve body are fixed in a manner that is easy to disassemble, a planetary gearbox is fixed on the convenient disassembly plate, a connecting head is fixed on the output shaft of the planetary gearbox, the connecting head rotates synchronously with the conical shaft, the connecting head is inserted into the conical shaft along the radial direction of the conical shaft, and the connecting head and the conical shaft are slidably fitted in a spline manner for easy assembly.

[0006] Preferably, the input shaft of the planetary gearbox is fixed with a sliding hexagonal shaft, the sliding sleeve is sleeved on the outer surface of the sliding hexagonal shaft by means of spline sliding, and a limiting nut block is coaxially fixed to one end of the mainspring center sleeve away from the first ratchet engagement disk, and a plurality of limiting grooves are provided on the edge of the limiting nut block.

[0007] Preferably, a second support disk is fixed on the outer shell of the planetary gearbox, and a first support disk is fixed above the second support disk via a guide slide rod, wherein a spring housing is slidably mounted on the inner side of all the guide slide rods in a spline manner, wherein the spring is arranged inside the spring housing, and the outer edge of the spring is fixed to the inner wall of the spring housing.

[0008] Preferably, three extrusion guide slides are fixed on the first support disk, and tubular screw rod brackets are slidably installed on the three extrusion guide slides. An extrusion spring is arranged around each extrusion guide slide, and both ends of the extrusion spring are fixedly matched with the extrusion guide slide and the tubular screw rod bracket, so as to extrude the tubular screw rod bracket to the upper surface of the first support disk through the extrusion spring. A tubular screw is fixed on the tubular screw rod bracket, and the tubular screw rod is rotatably sleeved on the outer surface of the sliding sleeve. The tubular screw rod is inserted into the inner side of the limiting nut block, and the tubular screw rod and the limiting nut block are threadedly matched.

[0009] Preferably, a plurality of limiting rocker pins are movably mounted on the upper surface of the first support disk, all of which are arranged in a circular array around the axis of the limiting nut block, and the limiting rocker pins can be inserted into the limiting grooves; the first support disk also has the same number of hollow copper columns as the limiting rocker pins movably mounted on it through a bracket, a permanent magnetic buffer rod is slidably inserted into the hollow copper column, one end of the permanent magnetic buffer rod is movably connected to the limiting rocker pin, wherein the swing range of the limiting rocker pin is limited by the upper surface of the first support disk; a top ring is fixed at the center position of the circle on the upper surface of the clockwork shell, and the top edge of the top ring is in contact with and cooperates with all the limiting rocker pins.

[0010] Preferably, a reset toothed disc is fixed on the first ratchet engagement disc or the mainspring center sleeve, the reset toothed disc is rotationally matched with the lower surface of the mainspring housing, and an intermediate rotating gear meshing with the reset toothed disc is also rotatably mounted on the mainspring housing.

[0011] Preferably, a mounting base is also fixed on the second support disk surface and the planetary gearbox, a protective shell is fixed on the mounting base, the first support disk surface and the second support disk surface are arranged inside the protective shell, and a rotating dial is also rotatably mounted on the upper surface of the protective shell, and the rotating dial is fixedly connected to the sliding sleeve; a gear column is rotatably mounted on the mounting base, the gear column is meshed and slidably matched with the intermediate rotating gear, and a driving gearbox is fixed on the lower surface of the mounting base, the output shaft of the driving gearbox is fixedly connected to the gear column, and a magnetic passive rotating disk is fixedly connected to the input shaft of the driving gearbox.

[0012] Preferably, a driving tube is installed in series at the pipeline position of one of the valve bodies, an impeller is rotatably installed inside the driving tube through a bracket, a sealing groove is fixedly connected on the outer surface of the driving tube, a driving shaft is installed at the top rotation seal inside the sealing groove, the driving shaft and the impeller are connected by a toothed transmission belt, the toothed transmission belt is arranged inside the sealing groove, wherein a magnetic active rotating disk is slidably sleeved on the outer surface of the driving shaft by a spline manner, the magnetic active rotating disk and the magnetic passive rotating disk are coaxially positioned, and mutually engaging teeth are arranged between the opposite surfaces of the magnetic active rotating disk and the magnetic passive rotating disk, and at the same time, the magnetic active rotating disk and the magnetic passive rotating disk are attracted by magnetic force; a sliding lifting frame is slidably installed on the outer surface of the protective shell, an insertion piece is fixed at the bottom end of the sliding lifting frame, the insertion piece is located at the seam between the magnetic passive rotating disk and the magnetic active rotating disk, and the seam positions of the magnetic active rotating disk and the magnetic passive rotating disk are both provided with chamfers to facilitate the insertion of the insertion piece between the magnetic active rotating disk and the magnetic passive rotating disk.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention is equipped with a rotary sealing valve core and a conical rotating shaft (valve stem) design, so that the valve can effectively achieve two-way sealing during operation. The sealing between the valve core and the valve body is extremely reliable, which can effectively prevent medium leakage and increase the stability and safety of the system. Especially under high pressure or high temperature conditions, the valve can still maintain its excellent sealing performance, avoiding leakage and system failure caused by sealing problems of traditional ball valves. At the same time, the conical rotating shaft (valve stem) provided can also effectively prevent the valve stem from being blown out due to excessive pressure, and combined with the two protective buckles provided on it, the two valve bodies are effectively locked and connected, and will not collapse due to excessive pressure; (2) The present invention realizes the automatic resetting function of the valve through the impeller, spring, sliding sleeve, and planetary gearbox configured in the resetting component. The user does not need to perform additional operations during use, and the closing process of the valve core can be automatically completed. This automatic reset function reduces the complexity of operation and improves the operating efficiency of the valve, especially in situations where frequent opening and closing are required; (3) The spring design in the reset component of the present invention can store sufficient elastic potential energy to ensure that the valve can quickly perform the reset action when needed. Compared with traditional hydraulic or pneumatic control systems, the mechanical energy storage method not only saves the consumption of external energy, but also improves the response speed of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the structure of the driving pipe of the present invention.

[0016] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at point A in the middle.

[0017] Figure 4 It is a schematic diagram of the internal structure of the protective shell of the present invention.

[0018] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point B in the middle.

[0019] Figure 6 It is a structural schematic diagram of the reset toothed disc of the present invention.

[0020] Figure 7 It is a structural schematic diagram of the mainspring housing of the present invention.

[0021] Figure 8 It is a schematic diagram of the structure of the limiting nut block of the present invention.

[0022] Fig. 9 It is a structural schematic diagram of the valve body of the present invention.

[0023] In the figure: 101-driving tube; 102-sealing groove; 103-driving shaft; 104-sliding lifting frame; 105-impeller; 106-toothed transmission belt; 107-insertion sheet; 108-magnetic active rotating disk; 109-magnetic passive rotating disk; 110-driving gearbox; 111-mounting base plate; 112-protective housing; 113-rotating dial; 114-gear column; 115-intermediate rotating gear; 116-first supporting disk surface; 117-guide slide rod; 118-second supporting disk surface; 119-spring housing; 120-tubular screw rod bracket; 121-extrusion guide slide rod; 122-extrusion Spring; 123-tubular screw; 124-limiting nut block; 125-limiting groove; 126-limiting rocker pin; 127-permanent magnetic buffer rod; 128-hollow copper column; 129-reset gear plate; 130-spring; 131-spring center sleeve; 132-sliding sleeve; 133-sliding hexagonal prism shaft; 134-first ratchet meshing plate; 135-second ratchet meshing plate; 136-planetary gearbox; 137-disassembly plate; 138-connector; 139-conical shaft; 140-valve body; 141-valve core; 142-protective buckle petal; 143-stud; 144-conical through hole; 145-top ring. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-9 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0025] The present invention provides a fixed ball valve with an internal valve stem anti-blowout structure, comprising two symmetrically arranged valve bodies 140, the two valve bodies 140 are fixedly sealed and connected as one body by a plurality of studs 143, a sealing oil valve core 141 is rotatably sealed between the two valve bodies 140, a conical through hole 144 is provided on the two valve bodies 140, a conical rotating shaft 139 is provided for the rotary seal in the conical through hole 144, and the conical rotating shaft 139 rotates synchronously with the valve core 141; a reset assembly is also fixed on the main bodies of the two valve bodies 140, and the reset assembly comprises an impeller 105 for providing power, a spring 130 for storing energy, and a valve core 141 for rotating. A sliding sleeve 132 is rotatable, wherein a second ratchet engagement disk 135 is fixed to the bottom end of the sliding sleeve 132, a mainspring center sleeve 131 is fixed to the center position of the mainspring 130, the mainspring center sleeve 131 is rotatably sleeved on the outer surface of the sliding sleeve 132, and a first ratchet engagement disk 134 is fixed to the bottom end of the mainspring center sleeve 131, the first ratchet engagement disk 134 is also rotatably sleeved on the outer surface of the sliding sleeve 132, and mutually meshing pawls are arranged between the first ratchet engagement disk 134 and the second ratchet engagement disk 135, for releasing the elastic potential energy stored in the mainspring 130 to the sliding sleeve 132. The two valve cores 141 are each provided with a flange skirt at the joint, and two symmetrically arranged protective buckle flaps 142 are buckled on the flange skirt. The bottom ends of the two protective buckle flaps 142 are fixed as a whole in a manner that is easy to disassemble, and the top ends of the two protective buckle flaps 142 are fixed as a whole with the valve body 140 in a manner that is easy to disassemble.

[0026] The reset assembly also includes a convenient disassembly disk 137 fixed on the two valve bodies 140. The convenient disassembly disk 137 is fixed to the valve body 140 in a manner that is easy to disassemble. A planetary gearbox 136 is fixed on the convenient disassembly disk 137. A connector 138 is fixed on the output shaft of the planetary gearbox 136. The connector 138 rotates synchronously with the conical shaft 139. The connector 138 is inserted into the conical shaft 139 along the radial direction of the conical shaft 139. The connector 138 and the conical shaft 139 are slidably matched in a spline manner for easy assembly. The input shaft of the planetary gearbox 136 is fixed with a sliding hexagonal shaft 133. The sliding sleeve 132 is sleeved on the outer surface of the sliding hexagonal shaft 133 in a spline sliding manner. A limiting nut block 124 is coaxially fixed to one end of the mainspring center sleeve 131 away from the first ratchet engagement disk 134. The edge of the limiting nut block 124 is provided with a plurality of limiting grooves 125. A second support disk 118 is fixed on the outer shell of the planetary gearbox 136, and a first support disk 116 is fixed above the second support disk 118 via a guide slide 117, wherein a spring housing 119 is slidably mounted on the inner side of all the guide slides 117 in a spline manner, wherein a spring 130 is arranged inside the spring housing 119, and the outer edge of the spring 130 is fixed to the inner wall of the spring housing 119.

[0027] Three extrusion guide slides 121 are fixed on the first support disk surface 116, and a tubular screw rod bracket 120 is slidably installed on the three extrusion guide slides 121. An extrusion spring 122 is arranged around each extrusion guide slide 121. Both ends of the extrusion spring 122 are fixedly matched with the extrusion guide slide 121 and the tubular screw rod bracket 120, and are used to extrude the tubular screw rod bracket 120 to the upper surface of the first support disk surface 116 through the extrusion spring 122. A tubular screw rod 123 is fixed on the tubular screw rod bracket 120, and the tubular screw rod 123 is rotatably sleeved on the outer surface of the sliding sleeve 132. The tubular screw rod 123 is inserted into the inner side of the limiting nut block 124, and the tubular screw rod 123 and the limiting nut block 124 are threadedly matched. A plurality of limiting rocker pins 126 are movably mounted on the upper surface of the first support disk 116, and all the limiting rocker pins 126 are arranged in a circular array around the axis of the limiting nut block 124, and the limiting rocker pins 126 can be inserted into the limiting groove 125; the first support disk 116 is also movably mounted with the same number of hollow copper columns 128 as the limiting rocker pins 126 through a bracket, and a permanent magnetic buffer rod 127 is slidably inserted into the hollow copper column 128, and one end of the permanent magnetic buffer rod 127 is movably connected to the limiting rocker pin 126, wherein the swing range of the limiting rocker pin 126 is limited by the upper surface of the first support disk 116; a top ring 145 is fixed at the center position of the circle on the upper surface of the clockwork housing 119, and the top edge of the top ring 145 is in contact with and cooperates with all the limiting rocker pins 126. A reset toothed disc 129 is fixed on the first ratchet engagement disc 134 or the mainspring center sleeve 131 , and the reset toothed disc 129 is rotationally matched with the lower surface of the mainspring housing 119 . An intermediate rotating gear 115 meshing with the reset toothed disc 129 is also rotationally mounted on the mainspring housing 119 . A mounting base plate 111 is also fixed on the second support disk surface 118 and the planetary gearbox 136, and a protective shell 112 is fixed on the mounting base plate 111. The first support disk surface 116 and the second support disk surface 118 are arranged inside the protective shell 112. A rotating dial 113 is also rotatably mounted on the upper surface of the protective shell 112, and the rotating dial 113 is fixedly connected to the sliding sleeve 132; a gear column 114 is rotatably mounted on the mounting base plate 111, and the gear column 114 is meshed and slidably matched with the intermediate rotating gear 115, and a driving gearbox 110 is fixed on the lower surface of the mounting base plate 111, and the output shaft of the driving gearbox 110 is fixedly connected to the gear column 114, and a magnetic passive rotating disk 109 is fixedly connected to the input shaft of the driving gearbox 110.

[0028] A driving tube 101 is installed in series at the pipeline position of one of the valve bodies 140, and an impeller 105 is rotatably installed inside the driving tube 101 through a bracket. A sealing groove 102 is fixedly connected on the outer surface of the driving tube 101, and a driving shaft 103 is installed on the top of the sealing groove 102 to rotate and seal. The driving shaft 103 and the impeller 105 are connected through a toothed transmission belt 106, and the toothed transmission belt 106 is arranged inside the sealing groove 102. A magnetic active rotating disk 108 is slidably sleeved on the outer surface of the driving shaft 103 in a spline manner. The magnetic active rotating disk 108 and the magnetic passive rotating disk 109 are coaxially located, and the magnetic Mutually engaged teeth are arranged between the opposing surfaces of the active rotating disk 108 and the magnetic passive rotating disk 109, and at the same time, there is magnetic attraction between the magnetic active rotating disk 108 and the magnetic passive rotating disk 109; a sliding lifting frame 104 is slidably installed on the outer surface of the protective shell 112, and an insertion piece 107 is fixed to the bottom end of the sliding lifting frame 104, and the insertion piece 107 is located at the joint between the magnetic passive rotating disk 109 and the magnetic active rotating disk 108, and the joint positions of the magnetic active rotating disk 108 and the magnetic passive rotating disk 109 are both chamfered to facilitate the insertion of the insertion piece 107 between the magnetic active rotating disk 108 and the magnetic passive rotating disk 109.

[0029] The working principle of a fixed ball valve with an internal valve stem anti-blowout structure disclosed in the present invention is as follows: the user rotates the rotating dial 113, the rotating dial 113 will drive the sliding sleeve 132 to rotate, the sliding sleeve 132 will drive the sliding hexagonal prism shaft 133 to rotate, the rotation of the sliding hexagonal prism shaft 133 will drive the input shaft of the planetary gearbox 136 to rotate, and then the output shaft of the planetary gearbox 136 drives the valve core 141 to rotate through the connecting head 138 and the conical shaft 139, at this time, the connection state between the two valve bodies 140 can be changed. When the valve body 140 is in a connected state, the fluid drives the impeller 105 to rotate, and then drives the driving shaft 103 to rotate through the toothed transmission belt 106, the driving shaft 103 drives the magnetic active rotating disk 108 to rotate, the magnetic active rotating disk 108 drives the magnetic passive rotating disk 109 to rotate (through magnetic attraction and tooth meshing transmission), the magnetic passive rotating disk 109 drives the input shaft of the driving gearbox 110 to rotate, the output shaft of the driving gearbox 110 drives the gear column 114 to rotate, the gear column 114 drives the intermediate rotating gear 115 to rotate, the intermediate rotating gear 115 drives the reset toothed disk 129 to rotate, the reset toothed disk 129 drives the first ratchet engagement disk 134 to rotate (drives the mainspring center sleeve 131 to rotate), the mainspring center sleeve 131 drives the center of the mainspring 130 to rotate, so that the mainspring 130 accumulates power (the mainspring center sleeve 131 drives the first ratchet engagement disk 1 34 rotates relative to the second ratchet engagement disk 135. In this rotation direction, the first ratchet engagement disk 134 and the second ratchet engagement disk 135 are in a slipping state and will not drive the second ratchet engagement disk 135 to rotate). During this process, the mainspring center sleeve 131 will also drive the limiting nut block 124 to rotate, and the limiting nut block 124 will rotate relative to the tubular screw rod 123 (the tubular screw rod 123 is fixed on the tubular screw rod bracket 120 and therefore cannot rotate). At this time, the limiting nut block 124 will move axially on the tubular screw rod 123, and at the same time drive the entire mainspring 130 and the mainspring housing 119 to move synchronously (the mainspring housing 119 rotates in coordination with the mainspring center sleeve 131, and the mainspring center sleeve 131 cannot be displaced in the axial direction of the mainspring housing 119). The synchronized mainspring housing 119 will slide on the guide slide 117, and the guide slide 117 can limit the rotation of the mainspring housing 119.When the limiting nut block 124 rotates and moves to the position of the limiting rocker pin 126, the limiting rocker pin 126 will penetrate into the limiting groove 125 and then jam the limiting nut block 124. At this time, the limiting nut block 124 cannot rotate, and the elastic potential energy stored in the central rotation of the spring 130 is also preserved (in this process, the user can drive the insertion piece 107 to insert into the magnetic active rotating disk 108 and the magnetic passive rotating disk 109 by pulling the sliding pulling frame 104 to cut off the power transmission, or ignore it, because when the limiting nut block 124 cannot rotate, the impeller 105 cannot rotate either. It should be noted that the teeth arranged on the magnetic active rotating disk 108 and the magnetic passive rotating disk 109 are close to the rotation center, so that when the insertion piece 107 is inserted between the magnetic active rotating disk 108 and the magnetic passive rotating disk 109, it will not interfere with the teeth).

[0030] The user can change the connection state of the valve body 140 by rotating the rotating dial 113, or automatically reset it by pulling the sliding lifting frame 104 and the rotating dial 113. Specifically, the purpose of pulling the sliding lifting frame 104 is to cut off the power transmission between the magnetic active rotating disk 108 and the magnetic passive rotating disk 109. The lifting of the rotating dial 113 is used to drive the sliding sleeve 132 to move, and the sliding sleeve 132 drives the second ratchet meshing disk 135 to move. After the second ratchet meshing disk 135 moves to a position in contact with the first ratchet meshing disk 134, it continues to be pulled upward. At this time, the second ratchet meshing disk 135 presses against the first ratchet meshing disk 134 and the center sleeve of the spring. 131, the limiting nut block 124 and the top ring 145 on the reset toothed disc 129 move upward synchronously (the first ratchet meshing disc 134 and the second ratchet meshing disc 135 can also cooperate with each other magnetically to maintain the contact state between the two when there is no external force), and after the top ring 145 moves to contact the limiting rocker pin 126, all the limiting rocker pins 126 will be pushed open, so that the limiting rocker pin 126 is pulled out of the limiting groove 125. During this process, the limiting rocker pin 126 will also drive the permanent magnetic buffer rod 127 to slide in the hollow copper column 128 (the permanent magnetic buffer rod 127 and the hollow copper column 128 will also swing), and then the rotating dial 113 can be released. At this time Since the limiting nut block 124 is no longer restricted by the limiting rocker pin 126, the limiting nut block 124 will rotate in the opposite direction under the elastic force of the mainspring 130, and then move axially on the tubular screw 123. During this process, the first ratchet meshing plate 134 will clamp the second ratchet meshing plate 135 and rotate with the second ratchet meshing plate 135, thereby driving the sliding sleeve 132 and the sliding hexagonal prism shaft 133 to rotate, and then driving the input shaft of the planetary gearbox 136 to rotate, and then driving the valve core 141 to rotate, closing the valve core 141 (depending on the position where the valve core 141 stays during assembly). Since the top ring 145 will also move with it, the top ring 145 will gradually move with the limiting rocker. The rod pin 126 is separated, and the limiting rocker pin 126 will reset under the action of gravity (or a torsion spring is provided at the movable connection between the limiting rocker pin 126 and the first support disk 116, and the rocker pin 126 will reset under the action of the torsion spring). Therefore, it is necessary to slow down the time required for the limiting rocker pin 126 to reset, so as to prevent it from being engaged with the limiting groove 125 again. The permanent magnetic buffer rod 127 and the hollow copper column 128 provided at this time can slow down the speed of resetting the limiting rocker pin 126. When the permanent magnetic buffer rod 127 moves, an induced current will be generated in the hollow copper column 128, and then a magnetic field will be generated. The magnetic field will hinder the movement of the permanent magnetic buffer rod 127, thereby slowing down the movement speed of the limiting rocker pin 126. When opening again, just repeat the above steps.

Claims

1. A fixed ball valve with a built-in valve stem blow-out prevention structure, characterized in that: The invention comprises two symmetrically arranged valve bodies (140), the two valve bodies (140) are fixedly sealed and connected as one body via a plurality of studs (143), a sealing oil valve core (141) is rotatably sealed between the two valve bodies (140), the two valve bodies (140) are each provided with a conical through hole (144), a conical rotating shaft (139) is rotatably sealed in the conical through hole (144), and the conical rotating shaft (139) rotates synchronously with the valve core (141); A reset assembly is also fixed on the main bodies of the two valve bodies (140), and the reset assembly includes an impeller (105) for providing power, a spring (130) for storing energy, and a sliding sleeve (132) for executing the rotation of the valve core (141), wherein a second ratchet engagement disk (135) is fixed to the bottom end of the sliding sleeve (132), a spring center sleeve (131) is fixed at the center position of the spring (130), and the spring center sleeve (131) is a rotating sleeve device. A first ratchet engagement disk (134) is fixed on the outer surface of the sliding sleeve (132) and at the bottom end of the mainspring center sleeve (131). The first ratchet engagement disk (134) is also rotatably sleeved on the outer surface of the sliding sleeve (132). A mutually meshing pawl is provided between the first ratchet engagement disk (134) and the second ratchet engagement disk (135) for releasing the elastic potential energy stored in the mainspring (130) to the sliding sleeve (132).

2. A fixed ball valve with a built-in valve stem blow-out prevention structure according to claim 1, characterized in that: The butt joints of the two valve cores (141) are both provided with flange skirts, and two symmetrically arranged protective buckle flaps (142) are buckled on the flange skirts. The bottom ends of the two protective buckle flaps (142) are fixed as a whole in a manner that is easy to disassemble, and the top ends of the two protective buckle flaps (142) are fixed as a whole with the main body of the valve body (140) in a manner that is easy to disassemble.

3. A fixed ball valve with a built-in valve stem blow-out prevention structure according to claim 2, characterized in that: The reset assembly further comprises a disassembly plate (137) fixed on the two valve bodies (140); the disassembly plate (137) and the valve body (140) are fixed in a manner that facilitates disassembly; a planetary gearbox (136) is fixed on the disassembly plate (137); a connector (138) is fixed on the output shaft of the planetary gearbox (136); the connector (138) rotates synchronously with the conical rotating shaft (139); the connector (138) is inserted into the conical rotating shaft (139) along the radial direction of the conical rotating shaft (139); and the connector (138) and the conical rotating shaft (139) are slidably matched in a spline manner to facilitate assembly.

4. A fixed ball valve with a built-in valve stem blow-out prevention structure according to claim 3, characterized in that: The input shaft of the planetary gearbox (136) is fixed with a sliding hexagonal shaft (133); the sliding sleeve (132) is sleeved on the outer surface of the sliding hexagonal shaft (133) by means of spline sliding; a limiting nut block (124) is coaxially fixed to one end of the mainspring center sleeve (131) away from the first ratchet engagement disk (134); and a plurality of limiting grooves (125) are provided on the edge of the limiting nut block (124).

5. A fixed ball valve with a built-in valve stem blow-out prevention structure according to claim 4, characterized in that: A second support disk (118) is fixed on the outer shell of the planetary gearbox (136), and a first support disk (116) is fixed in the air above the second support disk (118) via a guide slide bar (117), wherein a spring housing (119) is slidably mounted on the inner side of all the guide slide bars (117) in a spline manner, wherein a spring (130) is arranged inside the spring housing (119), and an outer edge of the spring (130) is fixed to an inner wall of the spring housing (119).

6. A fixed ball valve with a built-in valve stem blow-out prevention structure according to claim 5, characterized in that: Three extrusion guide slide bars (121) are fixed on the first support disk surface (116), and a tubular screw rod support (120) is slidably mounted on the three extrusion guide slide bars (121). An extrusion spring (122) is arranged around each extrusion guide slide bar (121), and both ends of the extrusion spring (122) are fixedly matched with the extrusion guide slide bars (121) and the tubular screw rod support (120) to be used for extruding the tubular screw rod support (120) onto the upper surface of the first support disk surface (116) through the extrusion spring (122). A tubular screw rod (123) is fixed on the tubular screw rod support (120), and the tubular screw rod (123) is rotatably sleeved on the outer surface of the sliding sleeve (132). The tubular screw rod (123) is inserted into the inner side of the limiting nut block (124), and the tubular screw rod (123) and the limiting nut block (124) are threadedly matched.

7. A fixed ball valve with a built-in valve stem blow-out prevention structure according to claim 6, characterized in that: A plurality of limiting rocker pins (126) are also movably mounted on the upper surface of the first support disk (116), all of which are arranged in a circular array around the axis of the limiting nut block (124), and the limiting rocker pins (126) can be snapped into the limiting grooves (125); the first support disk (116) is also movably mounted with the same number of hollow copper columns (128) as the limiting rocker pins (126) via a bracket, a permanent magnetic buffer rod (127) is slidably inserted into the hollow copper column (128), one end of the permanent magnetic buffer rod (127) is movably connected to the limiting rocker pin (126), wherein the swing range of the limiting rocker pin (126) is limited by the upper surface of the first support disk (116); a top ring (145) is fixed at the center position of the upper surface of the clockwork housing (119), and the top edge of the top ring (145) is in contact with and fits with all of the limiting rocker pins (126).

8. A fixed ball valve with a built-in valve stem blow-out prevention structure according to claim 7, characterized in that: A reset toothed disc (129) is fixed on the first ratchet engagement disc (134) or the mainspring center sleeve (131), the reset toothed disc (129) is rotationally matched with the lower surface of the mainspring housing (119), and an intermediate rotating gear (115) meshing with the reset toothed disc (129) is also rotationally mounted on the mainspring housing (119).

9. A fixed ball valve with a built-in valve stem blow-out prevention structure according to claim 8, characterized in that: A mounting base plate (111) is also fixed on the second support disc surface (118) and the planetary gearbox (136); a protective housing (112) is fixed on the mounting base plate (111); the first support disc surface (116) and the second support disc surface (118) are arranged inside the protective housing (112); a rotating dial (113) is also rotatably mounted on the upper surface of the protective housing (112); the rotating dial (113) is fixedly connected to the sliding sleeve (132); a gear column (114) is rotatably mounted on the mounting base plate (111); the gear column (114) is meshed and slidably matched with the intermediate rotating gear (115); a driving gearbox (110) is fixed on the lower surface of the mounting base plate (111); an output shaft of the driving gearbox (110) is fixedly connected to the gear column (114); and a magnetic passive rotating disc (109) is fixedly connected to the input shaft of the driving gearbox (110).

10. A fixed ball valve with a built-in valve stem blow-out prevention structure according to claim 9, characterized in that: A driving tube (101) is installed in series at a pipeline position of one of the valve bodies (140); an impeller (105) is rotatably installed inside the driving tube (101) via a bracket; a sealing groove (102) is fixedly connected on the outer surface of the driving tube (101); a driving shaft (103) is installed at the top of the sealing groove (102) in a rotatable seal; the driving shaft (103) and the impeller (105) are connected to each other via a toothed transmission belt (106); the toothed transmission belt (106) is arranged inside the sealing groove (102); a magnetic active rotating disk (108) is slidably sleeved on the outer surface of the driving shaft (103) in a spline manner; the magnetic active rotating disk (108) and the magnetic passive rotating disk (109) are coaxially located; mutually engaged teeth are arranged between the opposing surfaces of the magnetic active rotating disk (108) and the magnetic passive rotating disk (109); and magnetic attraction is generated between the magnetic active rotating disk (108) and the magnetic passive rotating disk (109); A sliding lifting frame (104) is slidably mounted on the outer surface of the protective shell (112), and an insertion piece (107) is fixed to the bottom end of the sliding lifting frame (104). The insertion piece (107) is located at the joint between the magnetic passive rotating disk (109) and the magnetic active rotating disk (108), and the joint positions of the magnetic active rotating disk (108) and the magnetic passive rotating disk (109) are both provided with chamfers to facilitate the insertion of the insertion piece (107) between the magnetic active rotating disk (108) and the magnetic passive rotating disk (109).

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