An explosion-proof V-type ball valve

Abstract

This invention relates to the field of ball valve technology, and in particular to an explosion-proof V-type ball valve. Addressing the lack of explosion-proof functionality in existing V-type ball valves, this invention provides an explosion-proof V-type ball valve, comprising a valve body, a V-type valve core, and a valve seat. The valve body includes a first valve body and a second valve body. The valve seat is disposed inside the first valve body on one side and cooperates with the V-type valve core. The valve body is equipped with a drive device for rotating the V-type valve core. When the V-type valve core rotates, it cooperates with the valve seat to control the opening or closing of the valve. An impact detection device is also provided inside the valve body, including a swingable sensing ball. The valve body also has an activation device that cooperates with the V-type valve core. When the sensing ball swings, the activation device operates, causing the V-type valve core to rotate and the valve to close. In the event of an explosion, the ball valve will be subjected to a large impact force, and the V-type ball valve can quickly close and block the flame, thereby preventing the spread of fire and preventing a fire.

Description

Technical Field

[0001] This invention relates to the field of ball valve technology, and in particular to an explosion-proof V-type ball valve. Background Technology

[0002] A V-type ball valve is a ball valve with a special V-shaped notch, primarily used for flow control. Unlike ordinary ball valves, the ball of a V-type ball valve has a V-shaped notch. This V-shaped notch has a shearing effect with the valve seat, enabling it to isolate various media. It is suitable for media containing fibers, small solid particles, slurries, etc. Therefore, V-type ball valves are widely used in pipeline transportation of oil, natural gas, and chemical products.

[0003] When transporting certain special flammable gases or liquids in pipelines, there is a certain risk of explosion. The existing technology, disclosed in CN110805714A, entitled "A V-type ball valve," solves the problem of easy disassembly and replacement, but it does not have explosion-proof function. If it cannot be stopped in time in the event of an explosion, it can easily cause a fire, and in severe cases, it can cause casualties. Therefore, an explosion-proof V-type ball valve is designed to solve the problems mentioned above. Summary of the Invention

[0004] This invention addresses the lack of explosion-proof functionality in existing V-type ball valves by providing an explosion-proof V-type ball valve. In the event of an explosion, the ball valve will be subjected to a large impact force, and the V-type ball valve can quickly close and block the flame, thereby preventing the spread of flames and preventing fires, effectively solving the problems mentioned in the background art.

[0005] The technical solution adopted by the present invention to solve the above problems is as follows:

[0006] An explosion-proof V-type ball valve includes a valve body, a V-type valve core, and a valve seat. The valve body comprises a first valve body and a second valve body, which are fixedly and sealed together by bolts. The V-type valve core is rotatably mounted in the second valve body. The valve seat is located inside the first valve body on one side and cooperates with the V-type valve core. The valve body is provided with a drive device for driving the V-type valve core to rotate. When the V-type valve core rotates, it cooperates with the valve seat to control the valve to open or close. The valve body is also provided with an impact detection device, which includes a swingable sensing ball. The valve body is also provided with an excitation device that cooperates with the V-type valve core. When the sensing ball swings, it can form a structure in which the excitation device works to make the V-type valve core rotate and the valve close.

[0007] The V-shaped valve core is provided with a first extension cylinder and a second extension cylinder at its upper and lower ends, respectively. The first extension cylinder and the second extension cylinder are rotatably connected to the inner wall of the second valve body. The first extension cylinder cooperates with the driving device, and the second extension cylinder cooperates with the excitation device.

[0008] A support box is fixed to the outer surface of the second valve body, and a protective cover is fixed to the support box. A rotatable cylindrical shaft is provided on the inner wall of the protective cover. An inner shaft is provided on the inner wall of the first extension cylinder. Spline teeth are provided on the upper end of the outer surface of the inner shaft. A tooth groove that mates with the spline teeth is opened on the inner wall of the cylindrical shaft. An annular sleeve that can move up and down is rotatably connected to the outer surface of the inner shaft.

[0009] The drive device includes a rotatable worm, a worm wheel meshing on the outer surface of the worm, and a cylindrical shaft fixed to the inner wall of the worm wheel.

[0010] The impact detection device also includes a ball rod, with a sensing ball fixed to the lower end of the ball rod. A ball pin is fixed to the outer surface of the ball rod, and the ball pin is rotatably connected to the inner wall of the second valve body. When the ball rod swings to the left or right, it can drive the annular sleeve to move downward.

[0011] The upper part of the outer surface of the second valve body is provided with a mounting platform, on which multiple short guide rods are fixedly connected. An annular sleeve is slidably connected to the outer surface of the multiple short guide rods. First sliding pins are fixedly connected to both sides of the outer surface of the annular sleeve. The mounting platform is also provided with two movable one-way guide plates, each with a V-shaped groove that mates with the first sliding pin.

[0012] The upper end of the cue is provided with a pin, and a first connecting rod is rotatably connected to the outer surface of the pin. An extension plate that is hinged to the first connecting rod is fixed to one end face of the unidirectional guide plate.

[0013] The inner wall of the support box is also provided with a top seat. The impact detection device also includes two tension springs. The upper ends of the tension springs are respectively hinged to the top seat, and the lower ends of the tension springs are respectively hinged to the pins. Two long guide rods are fixed to the inner wall of the top of the support box. The top seat is slidably connected to the outer surface of the two long guide rods. The top seat is also provided with a rotatable threaded rod. The support box is provided with a threaded cylinder that is threadedly connected to the threaded rod.

[0014] The actuation device includes a circular seat fixedly connected to the second valve body. A reset shaft is rotatably connected to the inner wall of the center of the circular seat. A coil spring that cooperates with the reset shaft is also provided on the inner wall of the circular seat. The second extension cylinder is fixedly connected to the outer surface of the reset shaft. A pointer is fixedly connected to the lower end of the outer surface of the reset shaft. A scale that cooperates with the pointer is provided on the lower surface of the circular seat.

[0015] An extension rocker arm is fixedly connected to the lower end of the outer surface of the reset shaft, and an arc-shaped slide rail is fixedly connected to the lower end surface of the round seat. A fixed stop block that cooperates with the extension rocker arm is fixedly connected to one end of the arc-shaped slide rail, and a movable stop block that cooperates with the extension rocker arm is slidably connected to the other end of the arc-shaped slide rail. A rotatable bolt is provided on the inner wall of the movable stop block.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] In use, this invention, through the cooperation of the impact detection device and the activation device, enables the induction ball to swing under the impact force of an explosion when a fire occurs inside the pipeline. The swinging of the induction ball, in turn, drives the activation device to operate. When the activation device operates, it causes the V-shaped valve core to rotate rapidly, thereby closing the valve. The impact detection device can detect the impact force inside the valve body. Under normal circumstances, when liquid or gas flows inside the valve body, the impact detection device will not be triggered. However, in the event of an explosion, the impact detection device will be triggered, causing the activation device to operate and the V-shaped valve core to rotate rapidly, closing the valve and thus blocking the spread of flames and preventing fires. Attached Figure Description

[0018] Figure 1 This is a first isometric view of an explosion-proof V-type ball valve according to the present invention.

[0019] Figure 2 This is a second isometric view of an explosion-proof V-type ball valve according to the present invention.

[0020] Figure 3 This is a cross-sectional view of the valve body of an explosion-proof V-type ball valve according to the present invention.

[0021] Figure 4 This is a schematic diagram of the installation of the V-shaped valve core of an explosion-proof V-shaped ball valve according to the present invention.

[0022] Figure 5 This is a schematic diagram of the cylinder shaft installation of an explosion-proof V-type ball valve according to the present invention.

[0023] Figure 6 This is a schematic diagram of the inner shaft structure of an explosion-proof V-type ball valve according to the present invention.

[0024] Figure 7 This is a cross-sectional view of the support box for an explosion-proof V-type ball valve according to the present invention.

[0025] Figure 8 This is a schematic diagram of the one-way guide plate installation of an explosion-proof V-type ball valve according to the present invention.

[0026] Figure 9 This is a schematic diagram of the pin installation of an explosion-proof V-type ball valve according to the present invention.

[0027] Figure 10 This is a cross-sectional view of the sensing ball of an explosion-proof V-type ball valve according to the present invention.

[0028] Figure 11 This is a schematic diagram of the installation of the extension lever of an explosion-proof V-type ball valve according to the present invention.

[0029] Numbering in the diagram: 1-First valve body, 2-Second valve body, 3-Valve seat, 4-V-type valve core, 5-Support box, 6-Protective cover, 7-Handle, 8-Worm gear, 9-Worm wheel, 10-Cylinder shaft, 11-Inner shaft, 12-Groove, 13-Spline gear, 14-Annular sleeve, 15-Short guide rod, 16-First sliding pin, 17-First extension cylinder, 18-Scale plate, 19-First handle, 20-Threaded rod, 21-Threaded cylinder, 22-Top seat, 23-Long guide rod, 24-Tension spring, 25-Pin Shaft, 26-ball rod, 27-elastic sleeve, 28-elastic layer, 29-ball pin, 30-sensor ball, 31-first connecting rod, 32-extension plate, 33-one-way guide plate, 34-V-groove, 35-second extension cylinder, 36-reset shaft, 37-T-shaped sealing bushing, 38-round seat, 39-coil spring, 40-pointer, 41-indexing instrument, 42-arc slide rail, 43-movable stop, 44-bolt, 45-second handle, 46-extension swing arm, 47-fixed stop, 48-mounting platform. Detailed Implementation

[0030] The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0031] like Figures 1-11 As shown, the present invention provides an explosion-proof V-type ball valve, including a valve body, a V-type valve core 4, and a valve seat 3. The valve body includes a first valve body 1 and a second valve body 2, which are fixedly and sealed together by bolts 44. The V-type valve core 4 is rotatably installed inside the second valve body 2. The valve seat 3 is disposed on one side inside the first valve body 1 and cooperates with the V-type valve core 4. The valve body is provided with a driving device for driving the V-type valve core 4 to rotate. When the V-type valve core 4 rotates, it can control the valve to open or close by cooperating with the valve seat 3. The valve body is also provided with an impact detection device, which includes a swingable sensing ball 30. The valve body is also provided with an excitation device that cooperates with the V-type valve core 4. When the sensing ball 30 swings, it can form a structure in which the excitation device works to make the V-type valve core 4 rotate and the valve close.

[0032] like Figures 1-10As shown, the valve body is hollow inside, with inlet and outlet at each end. The first valve body 1 is fixed to the second valve body 2 by multiple bolts 44. A sealing ring is also provided between the first valve body 1 and the second valve body 2 to improve the sealing performance of the valve body. The V-shaped valve core 4 is rotatably connected inside the second valve body 2, so that the V-shaped valve core 4 can only rotate inside the second valve body 2. The valve seat 3 is fixed inside the first valve body 1 by multiple screws. The valve seat 3 is also provided with multiple sealing rings to improve the sealing performance of the connection with the first valve body 1. The drive device can provide power for the rotation of the V-shaped valve core 4. With the cooperation of the V-shaped valve core 4 and the valve seat 3, the valve can be controlled to open or close when the V-shaped valve core 4 rotates. That is, when the valve is open, the inside of the valve body is in a communicating state. When the valve is closed, the valve body is in a blocked state. Through the cooperation of the impact detection device and the activation device, when an explosion occurs inside the pipeline due to a fire, the impact force of the explosion can drive the induction ball 30 to swing. When the induction ball 30 swings, it can drive the activation device to work. When the activation device works, it can make the V-shaped valve core 4 rotate rapidly, thereby closing the valve. The impact detection device can detect the impact force inside the valve body. Under normal circumstances, when liquid or gas flows inside the valve body, the impact detection device will not be triggered. In the event of an explosion, the impact detection device can be triggered to work, causing the activation device to work. The V-shaped valve core 4 rotates rapidly, closing the valve, thereby blocking the flame and preventing the fire from spreading.

[0033] The V-shaped valve core 4 is provided with a first extension cylinder 17 and a second extension cylinder 35 at its upper and lower ends, respectively. The first extension cylinder 17 and the second extension cylinder 35 are rotatably connected to the inner wall of the second valve body 2. The first extension cylinder 17 cooperates with the driving device, and the second extension cylinder 35 cooperates with the excitation device.

[0034] like Figures 4-5 As shown, the first extension cylinder 17 and the second extension cylinder 35 are fixed to the V-shaped valve core 4 by welding or interference fit, that is, when the first extension cylinder 17 or the second extension cylinder 35 rotates, it can drive the V-shaped valve core 4 to rotate; the first extension cylinder 17 and the second extension cylinder 35 are rotatably connected to the inner wall of the second valve body 2, which is equivalent to the V-shaped valve core 4 being rotatably connected inside the second valve body 2; when the first extension cylinder 17 is connected to the driving device, it can drive the first extension cylinder 17 and the V-shaped valve core 4 to rotate when the driving device is working, that is, control the valve to open or close; when the second extension cylinder 35 is connected to the activating device, it can drive the V-shaped valve core 4 to rotate rapidly when the activating device is working, and can quickly close the valve to block the explosion.

[0035] A support box 5 is fixedly attached to the outer surface of the second valve body 2. A protective cover 6 is fixedly attached to the support box 5. A rotatable cylindrical shaft 10 is provided on the inner wall of the protective cover 6. An inner shaft 11 is provided on the inner wall of the first extension cylinder 17. A spline tooth 13 is provided on the upper end of the outer surface of the inner shaft 11. A tooth groove 12 that mates with the spline tooth 13 is opened on the inner wall of the cylindrical shaft 10. An annular sleeve 14 that can move up and down is rotatably connected to the outer surface of the inner shaft 11.

[0036] like Figures 4-6 As shown, support box 5 is used to install the support impact detection device, and protective cover 6 is used to install the support drive device; as Figure 6 As shown, the lower end of the inner shaft 11 is splinedly connected to the first extension cylinder 17, meaning that the inner shaft 11 remains connected to the first extension cylinder 17 during vertical movement, and can drive the first extension cylinder 17 and V-shaped valve core 4 to rotate when the inner shaft 11 rotates. The upper end of the inner shaft 11 extends to the inner wall of the cylinder shaft 10, and through the meshing of the spline teeth 13 and the tooth grooves 12, it can drive the inner shaft 11, the first extension cylinder 17, and the V-shaped valve core 4 to rotate when the cylinder shaft 10 rotates. The annular sleeve 14 is rotatably connected to the outer surface of the inner shaft 11, and the annular sleeve 14 can also move up and down. When the inner shaft 11 rotates, it does not affect the connection with the annular sleeve 14, and the annular sleeve 14 can also move up and down. When the annular sleeve 14 moves up and down, it can also drive the inner shaft 11 to move up and down. The two movements do not interfere with each other. Under normal conditions, the annular sleeve 14 is at its highest position, that is, the inner shaft 11 is at its highest position. When the inner shaft 11 is at its highest position, the spline teeth 13 can mesh with the tooth groove 12. When the annular sleeve 14 moves down, it can drive the inner shaft 11 to move down. When the inner shaft 11 moves down, it will disengage the spline teeth 13 from the tooth groove 12. After disengagement, the inner shaft 11, the first extension cylinder 17, and the V-shaped valve core 4 are no longer limited by the cylinder shaft 10. When the excitation device is working, it can drive the V-shaped valve core 4 to rotate, so that the valve closes quickly.

[0037] The drive device includes a rotatable worm 8, a worm wheel 9 meshing on the outer surface of the worm 8, and a cylindrical shaft 10 fixed to the inner wall of the worm wheel 9.

[0038] like Figure 1 or Figure 4 As shown, the worm gear 8 is rotatably connected to the inner wall of the protective cover 6. Since the cylinder shaft 10 is rotatably connected to the inner wall of the protective cover 6, it is equivalent to the worm wheel 9 being rotatably connected to the inner wall of the protective cover 6. Through the meshing of the worm gear 8 and the worm wheel 9, the worm gear 8 can drive the worm wheel 9 to rotate when it rotates, and the worm wheel 9 can drive the cylinder shaft 10 to rotate when it rotates. When the cylinder shaft 10 rotates, it can drive the inner shaft 11, the first extension cylinder 17, and the V-shaped valve core 4 to rotate, thus controlling the opening or closing of the valve. Furthermore, the meshing of the worm wheel 9 and the worm gear 8 provides a self-locking function. When the cylinder shaft 10 and the inner shaft 11 are meshed, the position of the V-shaped valve core 4 is fixed when the worm gear 8 does not rotate, meaning the valve opening size is stable. Figure 1 As shown, a crank 7 is fixed to the outer surface of the worm 8. The worm 8 can be driven to rotate by driving the crank 7. Alternatively, a motor can be set up to replace the crank 7 to control the rotation of the worm 8.

[0039] The impact detection device also includes a ball rod 26, a sensing ball 30 fixedly connected to the lower end of the ball rod 26, and a ball pin 29 fixedly connected to the outer surface of the ball rod 26. The ball pin 29 is rotatably connected to the inner wall of the second valve body 2. When the ball rod 26 swings to the left or right, it can drive the annular sleeve 14 to move downward.

[0040] like Figures 6-9 As shown, the ball pin 29 is rotatably connected to the inner wall of the second valve body 2, meaning the ball pin 29 can roll within the inner wall of the second valve body 2. This is equivalent to the ball rod 26 being hinged to the inner wall of the second valve body 2. Even if the ball rod 26 and the sensing ball 30 can swing left and right, an elastic sleeve 27 is provided on the outer surface of the ball rod 26. An elastic layer 28 is also provided at the upper end of the second valve body 2, which is sealed to the elastic sleeve 27. The elastic layer 28 serves a sealing function, preventing liquid leakage from the ball pin 29. The elastic layer 28 has a certain degree of elasticity, ensuring that the ball rod 26 does not affect the sealed connection with the elastic layer 28 when it swings. When the sensing ball 30 swings left or right, it can drive the ball rod 26 to swing left or right. When the ball rod 26 swings to the left or right, it drives the annular sleeve 14 to move downward. The downward movement of the annular sleeve 14 disengages the inner shaft 11 from the cylindrical shaft 10, thus enabling the corresponding triggering device to close the valve. When an explosion occurs at the inlet end of the valve body, the impact force drives the sensing ball 30 to swing to the left. When an explosion occurs at the outlet end of the valve body, the impact force drives the sensing ball 30 to swing to the right. Since the left or right swing of the sensing ball 30 and the ball rod 26 can drive the annular sleeve 14 to move downward, the valve can be triggered to close quickly regardless of the direction of the explosion impact force on the sensing ball 30.

[0041] The upper part of the outer surface of the second valve body 2 is provided with a mounting platform 48. Multiple short guide rods 15 are fixedly connected to the mounting platform 48. An annular sleeve 14 is slidably connected to the outer surface of the multiple short guide rods 15. First sliding pins 16 are fixedly connected to both sides of the outer surface of the annular sleeve 14. The mounting platform 48 is also provided with two movable one-way guide plates 33. V-shaped grooves 34 that cooperate with the first sliding pins 16 are respectively opened on the one-way guide plates 33.

[0042] like Figures 6-8As shown, the mounting platform 48 is used to install and support components such as the short guide rod 15 and the unidirectional guide plate 33; the annular sleeve 14 is slidably connected to the outer surface of the short guide rod 15, and the short guide rod 15 supports and limits the annular sleeve 14, so that the annular sleeve 14 can only move up and down; at least two short guide rods 15 are symmetrically arranged, which enables the annular sleeve 14 to move up and down smoothly; the unidirectional guide plate 33 is slidably connected to the mounting platform 48 from left to right. When the unidirectional guide plate 33 moves to the left or right, the engagement of the V-groove 34 with the first sliding pin 16 enables the first sliding pin 16 and the annular sleeve 14 to move downward; the unidirectional guide plate 33 and the first sliding pin 16 can be arranged in one or two sets, preferably two sets symmetrically arranged, so that when the unidirectional guide plate 33 moves, it can drive the first sliding pin 16 and the annular sleeve 14 to move up and down smoothly.

[0043] The upper end of the cue stick 26 is provided with a pin 25, and a first connecting rod 31 is rotatably connected to the outer surface of the pin 25. An extension plate 32 that is hinged to the first connecting rod 31 is fixedly connected to one side end face of the unidirectional guide plate 33.

[0044] like Figures 8-9 As shown, a support seat is fixed to the upper surface of the cue stick 26, and a pin 25 is fixed to the inner wall of the support seat, which is equivalent to the pin 25 being fixed to the upper end of the cue stick 26. When the cue stick 26 swings, it can drive the pin 25 to move circumferentially. Through the first connecting rod 31 and the extension plate 32, when the pin 25 moves circumferentially, it can drive the extension plate 32 and the one-way guide plate 33 to move to the left or right. Therefore, no matter whether the cue stick 26 swings to the left or right, it can drive the annular sleeve 14 and the inner shaft 11 to move downward through the engagement of the first sliding pin 16 and the V-groove 34. The number of extension plates 32 and one-way guide plates 33 are set accordingly, and one or more first connecting rods 31 can be set.

[0045] The inner wall of the support box 5 is also provided with a top seat 22. The impact detection device also includes two tension springs 24. The upper ends of the tension springs 24 are respectively hinged to the top seat 22, and the lower ends of the tension springs 24 are respectively hinged to the pins 25. Two long guide rods 23 are fixedly connected to the inner wall of the top of the support box 5. The top seat 22 is slidably connected to the outer surface of the two long guide rods 23. The top seat 22 is also provided with a rotatable threaded rod 20. The support box 5 is provided with a threaded cylinder 21 that is threadedly connected to the threaded rod 20.

[0046] like Figures 8-9As shown, the upper and lower ends of the tension spring 24 are respectively fixed with hinge seats, which are rotatably connected to the outer surface of the pin 25 or the lower end of the top seat 22, which is equivalent to the upper and lower ends of the tension spring 24 being hinged to the top seat 22 and the pin 25 respectively; the tension spring 24 always exerts an upward tension on the pin 25, which enables the pin 25 to be in the position directly below the top seat 22 under normal conditions, that is, in the closest position to the top seat 22. In other words, under the tension of the tension spring 24, the cue stick 26 and the sensing ball 30 are in a vertical state under normal conditions; when the sensing ball 30 and the cue stick 26 swing to the left or right When the moving pin 25 moves circumferentially, it can stretch the tension spring 24. Through the provided long guide rod 23, the top seat 22 can only move up and down on the outer surface of the long guide rod 23 under its limiting position. The lower end of the threaded rod 20 is rotatably connected to the inner wall of the top seat 22, and the upper end of the threaded rod 20 is fixedly connected to a first handle 19. By driving the first handle 19, the threaded rod 20 can be driven to rotate. The threaded cylinder 21 is fixedly connected to the inner wall of the support box 5. When the first handle 19 and the threaded rod 20 rotate, through the threaded connection between the threaded rod 20 and the threaded cylinder 21, the threaded rod 20 can... The top seat 22 can move upwards or downwards. When it moves upwards, it stretches the tension spring 24, increasing the tension on the pin 25 and the cue stick 26. When the top seat 22 moves downwards, the tension spring 24 shortens, decreasing the tension on the pin 25 and the cue stick 26. When the tension increases, the cue stick 26 and the sensing ball 30 require a greater impact force to trigger the swing operation. Similarly, when the tension decreases, the impact force required to trigger the swing operation on the cue stick 26 and the sensing ball 30 decreases, meaning the swing operation can be triggered based on the... The system can be adjusted to meet the specific needs. The connection between the threaded rod 20 and the threaded cylinder 21 has a self-locking function, meaning that when the threaded rod 20 is not rotating, the corresponding top seat 22 is in a fixed position, which can stably support the tension spring 24 and stabilize the tension of the tension spring 24 on the pin 25 and the ball rod 26. A scale plate 18 is also fixed to the upper surface of the support box 5. The scale plate 18 is provided with scale lines that cooperate with the first handle 19. By observing the rise and fall of the first handle 19 to the designated position through the scale lines, the tension of the tension spring 24 can be more intuitively reflected.

[0047] The actuation device includes a circular seat 38 fixedly connected to the second valve body 2. A reset shaft 36 is rotatably connected to the inner wall of the center of the circular seat 38. A coil spring 39 that cooperates with the reset shaft 36 is also provided on the inner wall of the circular seat 38. The second extension cylinder 35 is fixedly connected to the outer surface of the reset shaft 36. A pointer 40 is fixedly connected to the lower end of the outer surface of the reset shaft 36. A scale 41 that cooperates with the pointer 40 is provided on the lower surface of the circular seat 38.

[0048] like Figure 10As shown, the circular seat 38 is fixed to the lower end of the outer surface of the second valve body 2. The reset shaft 36 passes through the second valve body 2. A T-shaped sealing sleeve 37, which is fixed to the second valve body 2, is rotatably connected to the outer surface of the reset shaft 36. The T-shaped sealing sleeve 37 is used to seal the reset shaft 36 and the second valve body 2. The T-shaped sealing sleeve 37 is prior art and will not be described in detail. One end of the coil spring 39 is hinged to the reset shaft 36, and the other end of the coil spring 39 is hinged to the inner wall of the circular seat 38. The coil spring 39 always exerts a driving force on the reset shaft 36. When the inner shaft 11 disengages from the spline tooth 13, the spring 39 drives the reset shaft 36, the second extension cylinder 35, and the V-shaped valve core 4 to rotate, thereby quickly closing the valve. With the pointer 40 and the scale 41 set, when the valve is opened, i.e. when the V-shaped valve core 4 rotates, the reset shaft 36 and the pointer 40 can be driven to rotate synchronously. When the pointer 40 rotates to the corresponding position of the scale 41, the opening size of the valve can be more intuitively reflected, which is convenient for adjusting the flow rate in the valve body.

[0049] An extension rocker arm 46 is fixedly connected to the lower end of the outer surface of the reset shaft 36, and an arc-shaped slide rail 42 is fixedly connected to the lower surface of the round seat 38. A fixed stop block 47 that cooperates with the extension rocker arm 46 is fixedly connected to one end of the arc-shaped slide rail 42, and a movable stop block 43 that cooperates with the extension rocker arm 46 is slidably connected to the other end of the arc-shaped slide rail 42. A rotatable bolt 44 is provided on the inner wall of the movable stop block 43.

[0050] like Figure 11As shown, when the reset shaft 36 rotates, it can drive the extension rocker arm 46 to rotate. The arc-shaped slide rail 42 is used to limit and support the movable stop block 43 and the fixed stop block 47. The movable stop block 43 can slide circumferentially on the inner wall of the arc-shaped slide rail 42. The bolt 44 is threadedly connected to the inner wall of the movable stop block 43. A second handle 45 is fixedly connected to the outer surface of the bolt 44. By driving the second handle 45, the bolt 44 can be driven to rotate. When the second handle 45 is driven to make the bolt 44 rotate in the forward direction, the bolt 44 can be driven to move upward. When the bolt 44 moves upward, it can contact and press the round seat 38. At this time, it can... The movable stop 43 can be fixed, meaning it can stably block the extension rocker arm 46. When the second handle 45 is driven to rotate the bolt 44 in the opposite direction, it can drive the bolt 44 to move downwards and disengage from the round seat 38. At this time, the movable stop 43 can move within the inner wall of the arc-shaped slide rail 42, thus adjusting its position. Through the fixed stop 47 and the movable stop 43, the extension rocker arm 46 can be limited to moving only between the fixed stop 47 and the movable stop 43. When the V-shaped valve core 4, the reset shaft 36, and the extension rocker arm 46 gradually rotate to close the valve, this... When the valve is fully closed, the extension lever 46 will gradually approach the movable stop block 43. Similarly, when the V-shaped valve core 4, the reset shaft 36, and the extension lever 46 gradually rotate to fully open the valve, the extension lever 46 will gradually approach the fixed stop block 47. When the valve is fully open, the extension lever 46 will swing to contact the fixed stop block 47. In explosion-proof use, the drive device can drive the cylinder shaft 10, the inner shaft 11, and the V-shaped valve core 4 to rotate. Even when the valve is open, the interior of the valve body remains closed. Normal flow is possible. When an explosion occurs, the impact force generated by the explosion will drive the induction ball 30 to swing. When the induction ball 30 swings to the designated position, it can drive the inner shaft 11 to move downward and disengage from the cylinder shaft 10. At this time, the excitation device, i.e. the coil spring 39, can quickly drive the V-shaped valve core 4 to rotate and reset. Even if the valve is closed, it can block the spread of flames. By swinging the induction ball 30 to the left or right, it can drive the inner shaft 11 to move downward and disengage from the cylinder shaft 10. That is, whether an explosion occurs at the inlet or outlet end of the valve body, the valve can be quickly closed.When used for pipeline protection, it can effectively protect the pipeline under specific conditions of unstable flow rate. After the drive device starts and opens the valve, the position of the movable stop 43 is adjusted by the drive bolt 44. After the movable stop 43 reaches the designated position, the first handle 19 is rotated to move the top seat 22 downward, reducing the tension of the tension spring 24 on the pin 25 and the ball rod 26. At this time, the sensing ball 30 can monitor the liquid or gas in the valve body. When the flow rate is too fast, it will also generate a large impact force. When the flow impact force in the valve body reaches a specified value, it can drive the sensing ball 30 to swing to the left or right to the top position, that is, the inner shaft 11 and the cylinder shaft 10 are disengaged again. When the excitation device drives the V-shaped valve core 4 and the extension swing rod 46 to rotate and reset again, the extension swing rod 46 will no longer swing to the initial position due to the obstruction of the movable stop 43, that is, the valve is still in the open state. At this time, the valve opening is small, thereby reducing the flow rate and protecting the pipeline.

[0051] In use, this invention, through the cooperation of the impact detection device and the activation device, enables the induction ball 30 to swing under the impact force of an explosion when a fire occurs inside the pipeline. The swinging of the induction ball 30, in turn, drives the activation device to operate. When the activation device operates, it causes the V-shaped valve core 4 to rotate rapidly, thereby closing the valve. The impact detection device can detect the impact force inside the valve body. Under normal circumstances, when liquid or gas flows inside the valve body, the impact detection device will not be triggered. However, in the event of an explosion, the impact detection device can be triggered, causing the activation device to operate. The V-shaped valve core 4 rotates rapidly, closing the valve and thus blocking the spread of flames and preventing a fire.

Claims

1. An explosion-proof V-type ball valve, comprising a valve body, a V-type valve core (4), and a valve seat (3), characterized in that: The valve body includes a valve body, a V-shaped valve core (4), and a valve seat (3). The valve body includes a first valve body (1) and a second valve body (2). The first valve body (1) and the second valve body (2) are fixedly and sealed together by bolts (44). The V-shaped valve core (4) is rotatably installed inside the second valve body (2). The valve seat (3) is located inside the first valve body (1) and cooperates with the V-shaped valve core (4). The valve body is provided with a drive device for driving the V-shaped valve core (4) to rotate. When the V-shaped valve core (4) rotates, it can control the valve to open or close by cooperating with the valve seat (3). The valve body is also provided with an impact detection device. The impact detection device includes a swingable induction ball (30). The valve body is also provided with an excitation device that cooperates with the V-shaped valve core (4). When the induction ball (30) swings, it can form a structure in which the excitation device works to make the V-shaped valve core (4) rotate and the valve close. The V-shaped valve core (4) is provided with a first extension cylinder (17) and a second extension cylinder (35) at its upper and lower ends respectively. The first extension cylinder (17) and the second extension cylinder (35) are rotatably connected to the inner wall of the second valve body (2). The first extension cylinder (17) cooperates with the driving device, and the second extension cylinder (35) cooperates with the excitation device. A support box (5) is fixedly attached to the outer surface of the second valve body (2), and a protective cover (6) is fixedly attached to the support box (5). A rotatable cylindrical shaft (10) is provided on the inner wall of the protective cover (6). An inner shaft (11) is provided on the inner wall of the first extension cylinder (17). A spline tooth (13) is provided on the upper end of the outer surface of the inner shaft (11). A tooth groove (12) that matches the spline tooth (13) is opened on the inner wall of the cylindrical shaft (10). An annular sleeve (14) that can move up and down is rotatably connected to the outer surface of the inner shaft (11). The impact detection device also includes a ball rod (26), a sensing ball (30) fixedly connected to the lower end of the ball rod (26), and a ball pin (29) fixedly connected to the outer surface of the ball rod (26). The ball pin (29) is rotatably connected to the inner wall of the second valve body (2). When the ball rod (26) swings to the left or right, it can drive the annular sleeve (14) to move downward. The excitation device includes a round seat (38) fixedly connected to the second valve body (2). A reset shaft (36) is rotatably connected to the inner wall of the center of the round seat (38). A coil spring (39) cooperating with the reset shaft (36) is also provided on the inner wall of the round seat (38). The second extension cylinder (35) is fixedly connected to the outer surface of the reset shaft (36). A pointer (40) is fixedly connected to the lower end of the outer surface of the reset shaft (36). A scale (41) cooperating with the pointer (40) is provided on the lower surface of the round seat (38).

2. The explosion-proof V-type ball valve as described in claim 1, characterized in that: The drive device includes a rotatable worm (8), a worm wheel (9) meshing on the outer surface of the worm (8), and the cylinder shaft (10) fixed to the inner wall of the worm wheel (9).

3. The explosion-proof V-type ball valve as described in claim 1, characterized in that: The upper part of the outer surface of the second valve body (2) is provided with a mounting platform (48), and a plurality of short guide rods (15) are fixedly connected on the mounting platform (48). An annular sleeve (14) is slidably connected to the outer surface of the plurality of short guide rods (15). A first sliding pin (16) is fixedly connected to both sides of the outer surface of the annular sleeve (14). The mounting platform (48) is also provided with two movable one-way guide plates (33). A V-shaped groove (34) that cooperates with the first sliding pin (16) is opened on the one-way guide plate (33).

4. The explosion-proof V-type ball valve as described in claim 3, characterized in that: The upper end of the cue stick (26) is provided with a pin (25), and a first connecting rod (31) is rotatably connected to the outer surface of the pin (25). An extension plate (32) that is hinged to the first connecting rod (31) is fixedly connected to one side end face of the unidirectional guide plate (33).

5. The explosion-proof V-type ball valve as described in claim 4, characterized in that: The inner wall of the support box (5) is also provided with a top seat (22). The impact detection device also includes two tension springs (24). The upper ends of the tension springs (24) are respectively hinged to the top seat (22), and the lower ends of the tension springs (24) are respectively hinged to the pins (25). The inner wall of the top of the support box (5) is fixed with two long guide rods (23). The top seat (22) is slidably connected to the outer surface of the two long guide rods (23). The top seat (22) is also provided with a rotatable threaded rod (20). The support box (5) is provided with a threaded cylinder (21) that is threadedly connected to the threaded rod (20).

6. The explosion-proof V-type ball valve as described in claim 1, characterized in that: The lower end of the outer surface of the reset shaft (36) is also fixedly connected to an extension rocker arm (46), and the lower end surface of the round seat (38) is fixedly connected to an arc-shaped slide rail (42). One end of the arc-shaped slide rail (42) is fixedly connected to a fixed stop block (47) that cooperates with the extension rocker arm (46), and the other end of the arc-shaped slide rail (42) is slidably connected to a movable stop block (43) that cooperates with the extension rocker arm (46). The inner wall of the movable stop block (43) is provided with a rotatable bolt (44).

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