Exhaust gate valve with anti-blocking function

Abstract

The application discloses a kind of exhaust gate valves with anti-blocking function, it is related to exhaust gate valve technical field.It includes connecting flange, valve body, drive motor, exhaust assembly, valve plate assembly, anti-seepage detection assembly and drive gear, the eccentric ring on the front valve piece makes the brush plate retracted between the rear valve plate and the front valve plate extend, under the rotation of cleaning gear ring, brush plate is driven to clean dirt and impurities in the wall of intercepting groove, at the same time, the cleaning plate on the front valve plate is used to clean the brush hair of brush plate, finally, the purpose of anti-blocking and self-cleaning of exhaust gate valve is achieved.The air on one side of valve body assembly is discharged through exhaust head by using exhaust assembly, and the movement of iron core rod is driven by exhaust float ball, the change of medium liquid level is converted into monitorable electric signal, and the control system is compared with preset value, when electric signal is at maximum value, valve plate assembly is automatically opened, so that the purpose of liquid level monitoring and automatic exhaust is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of exhaust gate valves, and specifically relates to an exhaust gate valve with a blockage prevention function. BACKGROUND

[0002] Gate valves have multiple functions such as cutting off fluid, regulating flow, and realizing flow splitting and flow combining. The gate valve can tightly fit the valve seat to effectively prevent fluid leakage, thereby ensuring the safety of the connected equipment. When the connected equipment has a problem or needs to be repaired, the rapid closing of the gate valve can prevent the fluid from continuing to flow, avoid potential accident risks, rapidly cut off the danger source, and protect the safety of personnel and equipment. The flexibility of the gate valve makes it have wide application value in complex pipeline systems.

[0003] Although the gate valve has strong practicability, the effect of the gate valve is single and the gate valve does not have an exhaust function. In the use process, blockage occurs, especially at the embedded part of the valve plate and the valve body. Since the embedded part often has grooves, dirt and impurities are easily accumulated in the grooves. When the dirt and impurities are too much, leakage occurs at the closed part of the valve plate. At present, there is a lack of effective way to detect the leakage around the valve plate, and the blockage in the grooves often needs to be cleaned manually, which is extremely inconvenient. SUMMARY

[0004] The purpose of the present application is to provide an exhaust gate valve with a blockage prevention function to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an exhaust gate valve with a blockage prevention function, comprising a valve body, the valve body is provided with connecting flanges at both ends, a drive motor is installed at the top end of the valve body, the output shaft of the drive motor penetrates through the valve body and is provided with a drive gear, the drive gear is rotatably installed in the valve body, a valve plate assembly is slidably installed in the valve body, the valve plate assembly is in meshing transmission with the drive gear, an exhaust assembly is installed in the valve body, a leakage prevention detection assembly is installed in the valve body, the leakage prevention detection assembly is located at the bottom end of the valve plate assembly, and the exhaust assembly is located on one side of the valve plate assembly; an exhaust channel is arranged on the valve body, an exhaust head is installed at one end of the exhaust channel, a plugging groove is arranged in the valve body, a detection groove is arranged in the valve body, and a flow cutting groove is arranged in the valve body, the plugging groove is in communication with the exhaust channel, the valve plate assembly is embedded in the flow cutting groove, and an electric valve is arranged at the bottom end of the flow cutting groove.

[0006] A control system is arranged in the valve body, and the control system is used for controlling the entire exhaust gate valve; a sealing assembly is arranged in the valve body, and the sealing assembly is used for sealing each component in the valve body.

[0007] When the exhaust valve body needs to be closed, the control system starts the driving motor, the output shaft of the driving motor drives the driving gear to rotate, the driving gear drives the sliding gear to rotate, the sliding gear rotates and drives the valve rod to rotate, since the valve rod is threadedly connected with the sliding gear and cannot slide under the restriction of the front valve plate and the rear valve plate, the valve rod converts the rotation into up and down sliding in the valve body, the valve rod drives the entire valve plate assembly to slide downward until the valve plate assembly is embedded with the intercepting groove in the valve body, thereby achieving the interception of the flowing medium, when the valve needs to be opened, the control system controls the driving motor to rotate, thereby making the valve rod slide upward and drive the valve plate assembly to be separated from the intercepting groove, achieving the effect of automatic opening and closing.

[0008] The valve plate assembly comprises a front valve plate and a rear valve plate, the front valve plate and the rear valve plate are connected through a connecting piece, the valve rod is installed on the rear valve plate, the valve rod is provided with a thread, the sliding gear is threadedly installed on the valve rod, the sliding gear is in meshing transmission with the driving gear, the sliding gear is rotatably installed in the valve body, the valve rod is slidably installed in the valve body, the cleaning motor is installed in the rear valve plate, the cleaning gear is installed on the output shaft of the cleaning motor, the cleaning assembly is rotatably installed between the rear valve plate and the front valve plate, the cleaning assembly is in meshing transmission with the cleaning gear, and the front valve plate and the rear valve plate are tightly embedded with the intercepting groove.

[0009] The cleaning assembly comprises a cleaning gear ring, the cleaning gear ring is provided with a gear tooth, the cleaning gear ring is in meshing transmission with the cleaning gear through the gear tooth, the cleaning gear ring is rotatably installed between the front valve plate and the rear valve plate, a plurality of sliding rods are slidably installed on the cleaning gear ring, a brush plate is installed at one end of the sliding rod, the brush plate is provided with brush hairs, a transmission wheel is rotatably installed at the other end of the sliding rod, and a return spring is installed between the sliding rod and the cleaning gear ring.

[0010] The front valve plate is provided with a cleaning plate, the cleaning plate is provided with a brush gear, the brush gear is made of rigid material, the front valve plate is provided with an eccentric ring, and the eccentric ring is designed as an eccentric circular ring.

[0011] The control system opens the electric valve at the bottom end of the intercepting groove, and the cleaning liquid is introduced into the exhaust gate valve. The motor output shaft drives the cleaning gear to rotate, and the cleaning gear rotates and drives the cleaning gear ring to rotate. In the normal state, the transmission wheel is located at the upper end of the eccentric ring, the return spring is naturally elongated, and the brush plate is tightly attached to the cleaning gear ring. The brush plate is retracted between the rear valve plate and the front valve plate, and does not contact the intercepting groove. The transmission wheel does not produce extrusion with the eccentric ring. With the rotation of the cleaning gear ring, the transmission wheel gradually turns to the lower side of the eccentric ring. Due to the eccentric device of the eccentric ring, the transmission wheel gradually extrudes the eccentric ring. The transmission wheel is pressed and drives the sliding rod to slide. The sliding rod overcomes the elastic force of the return spring and drives the brush plate to extend to the side of the cleaning gear ring. The brush plate extends and contacts the intercepting groove, thereby brushing the dirt and impurities in the intercepting groove. When the transmission wheel rotates from the lower end of the eccentric ring to the upper end with the rotation of the cleaning ring, the transmission wheel loses the extrusion force from the eccentric ring and is reset under the action of the elastic force of the return spring. The transmission wheel drives the brush plate to reset through the sliding rod. When the brush plate rotates to the cleaning plate with the cleaning gear ring, the bristles on the brush plate rub against the brush teeth on the cleaning plate, causing the impurities and dirt on the bristles and brush teeth to fall off. The falling impurities and dirt fall into the groove between the brush plates, rotate and flush with the cleaning liquid, and are discharged from the electric valve at the bottom end of the intercepting groove, thereby realizing the brushing of the groove of the intercepting groove and completing the self-cleaning of the brush plate. After brushing, the control system controls the rotation of the cleaning assembly and performs leakage detection. This cycle continues until the leakage detection is qualified, thereby achieving the purpose of preventing blockage.

[0012] The anti-leakage detection assembly comprises a first rack, a second rack, a detection ball assembly and a transmission gear. The first rack is slidably installed in the valve body. A touch rod is installed at the top end of the first rack and slidably installed in the valve body. A detection spring is installed at the bottom end of the first rack. The transmission gear is rotatably installed in the valve body and is in meshing transmission with the first rack. The second rack is slidably installed in the valve body and is in meshing transmission with the transmission gear. A limit rod is installed at the top end of the second rack and slidably connected with the valve body. A limit ring is installed at the top end of the limit rod and slidably connected with the valve body. The detection ball assembly is slidably installed in the valve body.

[0013] When the valve plate assembly is in the closed state, the detection spring is in the compressed state.

[0014] The detection ball assembly comprises a detection housing slidably connected with the valve body. A detection connecting rod is installed at the top end of the detection housing. A detection floating ball is installed at the top end of the detection connecting rod. The detection floating ball is located in a detection groove. A diaphragm is installed in the detection housing. A piezoelectric element is installed between the diaphragms. A detection contact is slidably installed on the detection housing.

[0015] The detection contact includes a piston sheet which is slidingly installed in the detection shell, a force transmission sheet is installed at the top end of the piston sheet, the force transmission sheet penetrates the top end of the detection shell and is installed with a pressure contact, the detection shell and the piston sheet are designed with sealing, and a compressible medium is filled between the detection shell and the piston sheet.

[0016] The diameter of the detection shell is consistent with the outer diameter of the limiting ring, and the diameter of the pressure contact is smaller than the inner diameter of the limiting ring.

[0017] When the valve plate assembly is in the open state, the detection spring is naturally elongated, and drives the first rack to move upward, the touch rod at the top end of the first rack extends into the intercepting groove, the first rack drives the transmission gear to rotate, the transmission gear drives the second rack to slide downward, the second rack drives the limiting ring to move downward through the limiting rod, so that the limiting ring is in contact with the top end of the detection shell, since the diameter of the detection shell is consistent with the outer diameter of the limiting ring, the detection shell cannot slide up and down under the pressure of the limiting ring, when the medium flows through, the detection ball assembly cannot be lifted by the buoyancy of the detection ball, when the valve plate assembly is closed, the back valve sheet extrudes the touch rod at the bottom end downward, the touch rod is pressed and drives the first rack to slide downward against the elastic force of the detection spring, the first rack drives the transmission gear to rotate in the opposite direction, the transmission gear drives the second rack to move upward, the second rack drives the limiting ring to move upward through the limiting rod, so that the detection ball assembly is no longer limited by the limiting ring, and can slide upward.

[0018] When the exhaust gate valve accumulates dirt and impurities in the intercepting groove for a long time, the valve plate assembly cannot be tightly embedded in the intercepting groove, causing leakage, even if the valve plate assembly is in a sealed state, the medium will flow away from the gap between the valve plate assembly and the intercepting groove, when flowing through the detection groove, it will enter the detection groove, the detection ball in the detection groove is lifted by the buoyancy, when the leakage exceeds the normal value, the detection ball drives the entire detection ball assembly to rise under the action of the buoyancy, after the detection ball assembly rises to a certain height, the pressure contact on the detection contact penetrates the ring hole of the limiting ring and contacts the valve plate, with the further rising of the detection ball, the detection ball continues to rise and drives the detection shell to rise through the detection connecting rod, the pressure contact is blocked and cannot move, at this time, the detection shell slides relative to the detection contact under the upward pulling force of the detection ball, so that the compressible medium in the detection shell is compressed by the piston sheet, the pressure in the detection shell increases, the diaphragm at the bottom end of the detection shell is pressed, the diaphragm extrudes the piezoelectric element, the piezoelectric element is pressed and generates electric charge, the electric charge is transmitted to the control system through the wire, after the control system receives the electric signal, the cleaning motor is started.

[0019] The exhaust assembly includes an induction coil and a core rod, the induction coil is installed in the valve body, the core rod is slidingly installed in the valve body, a limiting head is installed at the top end of the core rod, the diameter of the limiting head is larger than the diameter of the core rod, the limiting head is used to prevent the core rod from falling off the valve body, an exhaust ball is installed at the other end of the core rod, the exhaust ball is located in the blocking groove, and the inner diameter of the blocking groove is larger than the inner diameter of the exhaust ball.

[0020] When it is necessary to exhaust the medium flowing through the valve, the control system first controls the valve plate assembly to enter the closed state, and when the medium flows into the exhaust gate valve, it is blocked by the front valve plate. As the medium gradually enters, the liquid level on one side of the front valve plate gradually rises. At this time, the exhaust float ball gradually rises with the liquid level under the action of the buoyancy of the medium. The air in the valve body is squeezed into the plugging groove by the medium, and the air enters the exhaust channel from the gap between the plugging groove and the exhaust float ball, and then is discharged from the exhaust head. The exhaust float ball drives the iron core rod to rise, and when the iron core rod passes through the induction coil, an induced electromotive force is generated. The longer the length of the iron core rod passing through the induction coil, the greater the induced electromotive force. The control system analyzes the length of the iron core rod entering the induction coil according to the size of the induced electromotive force, and thus analyzes the height of the liquid level. When the air is completely exhausted, the exhaust float ball just blocks the exhaust channel to prevent the medium from leaking out through the exhaust channel. At the same time, the induced electromotive force is also at a maximum value. The control system automatically opens the valve plate assembly when the induced electromotive force is at the maximum value. At this time, the medium without gas flows out from the exhaust gate valve, thereby achieving the purpose of liquid level monitoring and automatic exhaust.

[0021] Compared with the prior art, the beneficial effects of the present application are:

[0022] 1. When dirt and impurities accumulate in the intercepting groove, causing the valve plate assembly to fail to tightly fit with the intercepting groove and resulting in leakage, the detection ball assembly is used to detect the leakage. The buoyancy of the detection float ball to the leaked medium is converted into the pressure on the piezoelectric element in the diaphragm, and then the pressure is converted into an electrical signal that can be monitored. After receiving the electrical signal, the control system performs self-cleaning, thereby achieving automatic detection of leakage.

[0023] 2. The eccentric ring on the front valve plate makes the brush plate retracted between the rear valve plate and the front valve plate extend. Under the rotation of the cleaning tooth ring, the brush plate drives the dirt and impurities in the wall of the intercepting groove to be cleaned. At the same time, the cleaning plate on the front valve plate cleans the brush hairs of the brush plate, thereby achieving the purpose of preventing the exhaust gate valve from being blocked and self-cleaning.

[0024] 3. The exhaust assembly is used to exhaust the air on one side of the valve body assembly through the exhaust head, and the iron core rod is driven to move by the exhaust float ball, thereby converting the change of the liquid level into an electrical signal that can be monitored. The control system compares the electrical signal with a preset value, and when the electrical signal is at a maximum value, the valve plate assembly is automatically opened, thereby achieving the purpose of liquid level monitoring and automatic exhaust.

[0025] 4. The limiting ring is used to constrain the detection ball assembly in the open gate state, when the medium flows, the detection ball assembly cannot be driven to rise by the buoyancy of the detection float, and the detection ball assembly is locked in the detection groove, which does not affect the medium flow; then the rear valve piece drives the touch rod to displace, and finally drives the limiting ring to displace, disconnects the constraint of the detection ball assembly, and realizes the opening and locking of the detection ball assembly.

[0026] 5. The driving motor is used to drive the driving gear to rotate, and then the driving gear is used to drive the sliding gear to rotate, the sliding gear drives the control valve plate assembly to slide up and down, so that the automatic opening and closing of the whole exhaust gate valve is realized. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the overall perspective view of the exhaust gate valve of the application;

[0028] Figure 2 It is the sectional view of the exhaust gate valve of the application;

[0029] Figure 3 It is the sectional view of the exhaust gate valve of the application; Figure 2 It is the local enlarged view of A area in the application;

[0030] Figure 4 It is the local enlarged view of B area in the application; Figure 2 It is the local enlarged view of B area in the application;

[0031] Figure 5 It is the perspective view of the valve plate assembly of the application;

[0032] Figure 6 It is the front view of the cleaning assembly and the front valve piece of the application;

[0033] Figure 7 It is the perspective view of the cleaning assembly of the application;

[0034] Figure 8 It is the perspective view of the anti-seepage detection assembly of the application;

[0035] Figure 9 It is the perspective view of the detection ball assembly of the application;

[0036] Figure 10 It is the perspective view of the exhaust assembly of the application.

[0037] In the diagram: 1. Connecting flange; 2. Valve body; 3. Drive motor; 4. Exhaust assembly; 5. Valve plate assembly; 6. Leakage detection assembly; 7. Drive gear; 61. Detection spring; 62. First rack; 63. Contact rod; 64. Second rack; 65. Transmission gear; 66. Limit rod; 67. Detection ball assembly; 68. Limit ring; 41. Exhaust float; 42. Iron core rod; 43. Limit head; 44. Induction coil; 51. Rear valve plate; 52. Valve stem; 53. Sliding gear; 54. Front valve plate; 55. Cleaning motor; 56. Cleaning... 57. Gear cleaning assembly; 541. Cleaning plate; 542. Eccentric ring; 571. Cleaning gear ring; 572. Brush plate; 573. Drive wheel; 574. Return spring; 575. Sliding rod; 671. Detection float; 672. Detection connecting rod; 673. Detection housing; 674. Diaphragm; 675. Piezoelectric element; 676. Detection contact; 6761. Pressure contact; 6762. Force transmission plate; 6763. Piston plate; 21. Exhaust head; 22. Exhaust passage; 23. Detection groove; 24. Sealing groove; 25. Cut-off groove. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] like Figures 1-10 As shown, the present invention provides a technical solution for an exhaust gate valve with anti-clogging function: it includes a valve body 2, with connecting flanges 1 at both ends of the valve body 2, a drive motor 3 installed at the top of the valve body 2, the output shaft of the drive motor 3 passing through the valve body 2 and having a drive gear 7 installed thereon, the drive gear 7 being rotatably installed inside the valve body 2, a valve plate assembly 5 being slidably installed inside the valve body 2, the valve plate assembly 5 meshing with the drive gear 7 for transmission, an exhaust assembly 4 being installed inside the valve body 2, an anti-seepage detection assembly 6 being installed inside the valve body 2, the anti-seepage detection assembly 6 being located at the bottom end of the valve plate assembly 5, and the exhaust assembly 4 being located on one side of the valve plate assembly 5; an exhaust channel 22 is provided on the valve body 2, an exhaust head 21 is installed at one end of the exhaust channel 22, a sealing groove 24 is provided inside the valve body 2, a detection groove 23 is provided inside the valve body 2, and a flow interception groove 25 is provided inside the valve body 2, the sealing groove 24 communicating with the exhaust channel 22, the valve plate assembly 5 fitting into the flow interception groove 25, and an electric valve being provided at the bottom end of the flow interception groove 25.

[0040] The valve body 2 is equipped with a control system, which is used to control the entire exhaust gate valve; the valve body 2 is equipped with a sealing assembly, which is used to seal all components inside the valve body 2.

[0041] The exhaust assembly 4 comprises an induction coil 44 and a core rod 42, the induction coil 44 is installed in the valve body 2, the core rod 42 is slidingly installed in the valve body 2, the top end of the core rod 42 is installed with a limit head 43, the diameter of the limit head 43 is larger than that of the core rod 42, the limit head 43 is used to prevent the core rod 42 from falling off the valve body 2, the other end of the core rod 42 is installed with an exhaust float ball 41, the exhaust float ball 41 is located in the blocking groove 24, and the inner diameter of the blocking groove 24 is larger than that of the exhaust ball.

[0042] The anti-seepage detection assembly 6 comprises a first rack 62, a second rack 64, a detection ball assembly 67 and a transmission gear 65, the first rack 62 is slidingly installed in the valve body 2, the top end of the first rack 62 is installed with a touch rod 63, the touch rod 63 is slidingly installed in the valve body 2, the bottom end of the first rack 62 is installed with a detection spring 61, the transmission gear 65 is rotatably installed in the valve body 2, the transmission gear 65 is in meshing transmission with the first rack 62, the second rack 64 is slidingly installed in the valve body 2, the second rack 64 is in meshing transmission with the transmission gear 65, the top end of the second rack 64 is installed with a limit rod 66, the limit rod 66 is slidingly connected with the valve body 2, the top end of the limit rod 66 is installed with a limit ring 68, the limit ring 68 is slidingly connected with the valve body 2, and the detection ball assembly 67 is slidingly installed in the valve body 2. When the valve plate assembly 5 is in the closed state, the detection spring 61 is in the compressed state.

[0043] The detection ball assembly 67 comprises a detection housing 673, the detection housing 673 is slidingly connected with the valve body 2, the top end of the detection housing 673 is installed with a detection connecting rod 672, the top end of the detection connecting rod 672 is installed with a detection float ball 671, the detection float ball 671 is located in the detection groove 23, the detection housing 673 is installed with a diaphragm 674, the diaphragm 674 is installed with a piezoelectric element 675, and the detection housing 673 is slidingly installed with a detection contact 676.

[0044] The detection contact 676 comprises a piston sheet 6763, the piston sheet 6763 is slidingly installed in the detection housing 673, the top end of the piston sheet 6763 is installed with a force transmission sheet 6762, the force transmission sheet 6762 penetrates the top end of the detection housing 673 and is installed with a pressure contact 6761, the detection housing 673 and the piston sheet 6763 are designed to be sealed, and the detection housing 673 and the piston sheet 6763 are filled with compressible medium. The diameter of the detection housing 673 is consistent with the outer diameter of the limit ring 68, and the diameter of the pressure contact 6761 is smaller than the inner diameter of the limit ring 68.

[0045] The valve plate assembly 5 comprises a front valve plate 54 and a rear valve plate 51, the front valve plate 54 is connected with the rear valve plate 51 through a connecting piece, a valve rod 52 is installed on the rear valve plate 51, the valve rod 52 is provided with a thread, a sliding gear 53 is threadedly installed on the valve rod 52, the sliding gear 53 is in meshing transmission with the driving gear 7, the sliding gear 53 is rotatably installed in the valve body 2, the valve rod 52 is slidably installed in the valve body 2, a cleaning motor 55 is installed in the rear valve plate 51, a cleaning gear 56 is installed on the output shaft of the cleaning motor 55, a cleaning assembly 57 is rotatably installed between the rear valve plate 51 and the front valve plate 54, the cleaning assembly 57 is in meshing transmission with the cleaning gear 56, and the front valve plate 54 and the rear valve plate 51 are tightly embedded with the intercepting groove 25.

[0046] The cleaning assembly 57 comprises a cleaning gear ring 571, the cleaning gear ring 571 is provided with a gear tooth, the cleaning gear ring 571 is in meshing transmission with the cleaning gear 56 through the gear tooth, the cleaning gear ring 571 is rotatably installed between the front valve plate 54 and the rear valve plate 51, a plurality of sliding rods 575 are slidably installed on the cleaning gear ring 571, one end of the sliding rod 575 is provided with a brush plate 572, the brush plate 572 is provided with a brush, the other end of the sliding rod 575 is rotatably provided with a transmission wheel 573, and the sliding rod 575 is provided with a reset spring 574 between the cleaning gear ring 571.

[0047] The front valve plate 54 is provided with a cleaning plate 541, the cleaning plate 541 is provided with a brush tooth, the brush tooth is made of rigid material, the front valve plate 54 is provided with an eccentric ring 542, and the eccentric ring 542 is designed as an eccentric ring.

[0048] The working principle of the present application is as follows: when the exhaust valve body 2 needs to be closed, the control system starts the driving motor 3, the output shaft of the driving motor 3 drives the driving gear 7 to rotate, the driving gear 7 drives the sliding gear 53 to rotate, the sliding gear 53 rotates and drives the valve rod 52 to rotate, since the valve rod 52 is threadedly connected with the sliding gear 53 and cannot slide under the limiting action of the front valve plate 54 and the rear valve plate 51, the valve rod 52 converts the rotation into up and down sliding in the valve body 2, the valve rod 52 drives the entire valve plate assembly 5 to slide downwards, until the valve plate assembly 5 is embedded with the intercepting groove 25 in the valve body 2, so that the flow medium is cut off, when it is needed to open, the control system controls the driving motor 3 to rotate, so that the valve rod 52 slides upwards, drives the valve plate assembly 5 to separate from the intercepting groove 25, and the effect of automatic opening and closing is realized.

[0049] When the medium needs to be vented, the control system first controls the valve plate assembly 5 to enter the closed state. When the medium flows into the venting gate valve, it will be blocked by the front valve plate 54. As the medium gradually enters, the liquid level on one side of the front valve plate 54 gradually rises. At this time, the venting float ball 41 gradually rises with the liquid level under the action of the buoyancy of the medium. The air in the valve body 2 is squeezed into the plugging groove 24 by the medium. The air enters the venting channel 22 from the gap between the plugging groove 24 and the venting float ball 41, and then is discharged from the venting head 21 by the venting channel 22. The venting float ball 41 drives the iron core rod 42 to rise. When the iron core rod 42 passes through the induction coil 44, an induced electromotive force is generated. The longer the length of the iron core rod 42 passing through the induction coil 44, the greater the induced electromotive force. The control system analyzes the length of the iron core rod 42 entering the induction coil 44, and thus analyzes the height of the liquid level, according to the size of the induced electromotive force. When the air is completely discharged, the venting float ball 41 just blocks the venting channel 22 to prevent the medium from leaking through the venting channel 22. At the same time, the induced electromotive force is at a maximum value. The control system automatically opens the valve plate assembly 5 when the induced electromotive force is at the maximum value. At this time, the medium without gas flows out from the venting gate valve, thereby achieving the purpose of liquid level monitoring and automatic venting.

[0050] When the valve plate assembly 5 is in the open state, the detection spring 61 naturally elongates and drives the first rack 62 to move upward. The touch rod 63 at the top of the first rack 62 extends into the flow-cutting groove 25. The first rack 62 drives the transmission gear 65 to rotate, and the transmission gear 65 drives the second rack 64 to slide downward. The second rack 64 drives the limiting ring 68 to move downward through the limiting rod 66, so that the limiting ring 68 contacts the top of the detection shell 673. Since the diameter of the detection shell 673 is consistent with the outer diameter of the limiting ring 68, the detection shell 673 cannot slide up and down under the pressure of the limiting ring 68. When the medium flows, the detection float ball 671 cannot drive the detection ball assembly 67 to rise by buoyancy.

[0051] When the exhaust gate valve due to long-term use, the accumulation of dirt and impurities in the intercepting groove 25, so that the valve plate assembly 5 can not be tightly embedded with intercepting groove 25 and cause leakage, even if the valve plate assembly 5 is in a sealed state, the medium will flow from the gap between the valve plate assembly 5 and the intercepting groove 25, when flowing through the detection groove 23, it will enter the detection groove 23, the detection ball 671 in the detection groove 23 is lifted by the buoyancy, when the leakage exceeds the normal value, the detection ball 671 is lifted by the buoyancy and drives the entire detection ball assembly 67 to rise, the detection ball assembly 67 rises to a certain height, the pressure contact 6761 on the detection contact 676 passes through the ring hole of the limiting ring 68 and contacts the valve plate, with the further rising of the detection ball 671, the detection ball 671 continues to rise and drives the detection shell 673 to rise through the detection connecting rod 672, the pressure contact 6761 is blocked and cannot move, at this time the detection shell 673 slides relative to the detection contact 676 under the upward pulling force of the detection ball 671, so that the compressible medium in the detection shell 673 is compressed by the piston sheet 6763, the pressure in the detection shell 673 increases, the diaphragm 674 at the bottom end of the detection shell 673 is pressed, the diaphragm 674 causes the piezoelectric element 675 to be extruded, the piezoelectric element 675 is pressed and generates electric charge, the electric charge is transmitted to the control system through the wire, the control system receives the electric signal and starts the cleaning motor 55.

[0052] The control system opens the electric valve at the bottom end of the intercepting groove 25, and introduces cleaning liquid into the exhaust gate valve. The output shaft of the cleaning motor 55 drives the cleaning gear 56 to rotate, which in turn drives the cleaning gear ring 571 to rotate. In the normal state, the transmission wheel 573 is located at the upper end of the eccentric ring 542, the return spring 574 is naturally elongated, and the brush plate 572 is tightly attached to the cleaning gear ring 571. The brush plate 572 is retracted between the rear valve plate and the front valve plate, and does not come into contact with the intercepting groove 25. The transmission wheel 573 does not produce extrusion with the eccentric ring 542. As the cleaning gear ring 571 rotates, the transmission wheel 573 gradually turns below the eccentric ring 542. Due to the eccentric device of the eccentric ring 542, the transmission wheel 573 gradually extrudes the eccentric ring 542. After the transmission wheel 573 is pressed, it drives the sliding rod 575 to slide, overcoming the elastic force of the return spring 574 and driving the brush plate 572 to extend out of the side of the cleaning gear ring 571. The brush plate 572 extends and comes into contact with the intercepting groove 25, thereby brushing the dirt and impurities in the intercepting groove 25. When the transmission wheel 573 rotates from the lower end of the eccentric ring 542 back to the upper end, the transmission wheel 573 loses the extrusion force from the eccentric ring 542 and is reset under the action of the elastic force of the return spring 574. The transmission wheel 573 drives the brush plate 572 to reset through the sliding rod 575. When the brush plate 572 rotates with the cleaning gear ring 571 to the cleaning plate 541, the bristles on the brush plate 572 rub against the brush teeth on the cleaning plate 541, causing the impurities and dirt on the bristles and brush teeth to fall off. The falling impurities and dirt fall into the grooves between the brush plates 572, rotate with the cleaning liquid, and are discharged from the electric valve at the bottom end of the intercepting groove 25, thereby achieving brushing of the grooves of the intercepting groove 25 and completing self-cleaning of the brush plate 572. After brushing is completed, the control system controls the cleaning assembly 57 to rotate and reset, and performs leakage detection. This cycle continues until the leakage detection is qualified, thereby achieving the purpose of preventing blockage.

[0053] It will be obvious to a person skilled in the art that, without departing from the spirit or essential characteristics of the application, the present application can be implemented in other specific forms. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the description given above, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims.

Claims

1. A drain gate valve having a clogging prevention function, characterized by: The exhaust gate valve comprises a valve body (2), the valve body (2) is provided with connecting flanges (1) at both ends, a driving motor (3) is installed at the top end of the valve body (2), the output shaft of the driving motor (3) penetrates through the valve body (2) and is provided with a driving gear (7), the driving gear (7) is rotatably installed in the valve body (2), a valve plate assembly (5) is slidably installed in the valve body (2), the valve plate assembly (5) is in meshing transmission with the driving gear (7), an exhaust assembly (4) is installed in the valve body (2), an anti-seepage detection assembly (6) is installed in the valve body (2), the anti-seepage detection assembly (6) is located at the bottom end of the valve plate assembly (5), and the exhaust assembly (4) is located at one side of the valve plate assembly (5); the valve body (2) is provided with an exhaust channel (22), one end of the exhaust channel (22) is provided with an exhaust head (21), the valve body (2) is provided with a plugging groove (24), a detection groove (23) and a cut-off groove (25), the plugging groove (24) is communicated with the exhaust channel (22), the valve plate assembly (5) is embedded in the cut-off groove (25), and the bottom end of the cut-off groove (25) is provided with an electric valve.

2. The exhaust gate valve with anti-blocking function according to claim 1, characterized in that: The valve plate assembly (5) comprises a front valve plate (54) and a rear valve plate (51), the front valve plate (54) and the rear valve plate (51) are connected through a connecting piece, a valve rod (52) is installed on the rear valve plate (51), the valve rod (52) is provided with a thread, a sliding gear (53) is threadedly installed on the valve rod (52), the sliding gear (53) is in meshing transmission with the driving gear (7), the sliding gear (53) is rotatably installed in the valve body (2), the valve rod (52) is slidably installed in the valve body (2), a cleaning motor (55) is installed in the rear valve plate (51), a cleaning gear (56) is installed on the output shaft of the cleaning motor (55), a cleaning assembly (57) is rotatably installed between the rear valve plate (51) and the front valve plate (54), the cleaning assembly (57) is in meshing transmission with the cleaning gear (56), and the front valve plate (54) and the rear valve plate (51) are tightly embedded in the cut-off groove (25).

3. The anti-jamming exhaust gate valve according to claim 2, characterized in that: The cleaning assembly (57) comprises a cleaning gear ring (571), the cleaning gear ring (571) is provided with a gear tooth, the cleaning gear ring (571) is in meshing transmission with the cleaning gear (56) through the gear tooth, the cleaning gear ring (571) is rotatably installed between the front valve plate (54) and the rear valve plate (51), a plurality of sliding rods (575) are slidably installed on the cleaning gear ring (571), a brush plate (572) is installed at one end of the sliding rod (575), the brush plate (572) is provided with a brush, a transmission wheel (573) is rotatably installed at the other end of the sliding rod (575), and a return spring (574) is installed between the sliding rod (575) and the cleaning gear ring (571).

4. The anti-jamming exhaust gate valve according to claim 3, characterized in that: The front valve plate (54) is provided with a cleaning plate (541), the cleaning plate (541) is provided with brush teeth, the brush teeth are made of rigid material, the front valve plate (54) is provided with an eccentric ring (542), and the eccentric ring (542) is designed as an eccentric ring.

5. The anti-jamming exhaust gate valve according to claim 1, characterized in that: The anti-seepage detection assembly (6) comprises a first rack (62), a second rack (64), a detection ball assembly (67) and a transmission gear (65), the first rack (62) is slidingly installed in the valve body (2), a touch rod (63) is installed at the top end of the first rack (62), the touch rod (63) is slidingly installed in the valve body (2), a detection spring (61) is installed at the bottom end of the first rack (62), the transmission gear (65) is rotationally installed in the valve body (2), the transmission gear (65) is in meshing transmission with the first rack (62), the second rack (64) is slidingly installed in the valve body (2), the second rack (64) is in meshing transmission with the transmission gear (65), a limiting rod (66) is installed at the top end of the second rack (64), the limiting rod (66) is slidingly connected with the valve body (2), a limiting ring (68) is installed at the top end of the limiting rod (66), the limiting ring (68) is slidingly connected with the valve body (2), and the detection ball assembly (67) is slidingly installed in the valve body (2).

6. The anti-jamming exhaust gate valve according to claim 5, characterized in that: The detection ball assembly (67) comprises a detection shell (673), the detection shell (673) is slidingly connected with the valve body (2), a detection connecting rod (672) is installed at the top end of the detection shell (673), a detection floating ball (671) is installed at the top end of the detection connecting rod (672), the detection floating ball (671) is located in a detection groove (23), a diaphragm (674) is installed in the detection shell (673), piezoelectric elements (675) are installed between the diaphragms (674), and a detection contact (676) is slidingly installed on the detection shell (673).

7. The anti-jamming exhaust gate valve according to claim 6, characterized in that: The detection contact (676) comprises a piston sheet (6763), the piston sheet (6763) is slidingly installed in the detection shell (673), a force transmission sheet (6762) is installed at the top end of the piston sheet (6763), the force transmission sheet (6762) penetrates through the top end of the detection shell (673) and is provided with a pressure contact (6761), the detection shell (673) and the piston sheet (6763) are designed in a sealing mode, and a compressible medium is filled between the detection shell (673) and the piston sheet (6763).

8. The anti-jamming exhaust gate valve according to claim 1, characterized in that: The exhaust assembly (4) comprises an induction coil (44) and a core rod (42), the induction coil (44) is installed in the valve body (2), the core rod (42) is slidingly installed in the valve body (2), the top end of the core rod (42) is provided with a limiting head (43), the diameter of the limiting head (43) is greater than that of the core rod (42), the limiting head (43) is used for preventing the core rod (42) from falling off the valve body (2), and the other end of the core rod (42) is provided with an exhaust float ball (41), the exhaust float ball (41) is located in a blocking groove (24), and the inner diameter of the blocking groove (24) is greater than that of the exhaust ball.

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