Ball type swing check valve

Abstract

The present invention discloses a ball-type swing check valve, which belongs to the field of valve technology and comprises a housing, a valve cover sealed and installed at an inspection port on the top of the housing, a lifting ring installed at the top of the valve cover, a shaft housing provided on one side of the upper part of the housing, a rotary shaft rotatably provided in the shaft housing, and a support sleeve installed on the rotary shaft; a handle arm is connected to one side of the support sleeve, one end of the handle arm is connected to a mounting sleeve and a valve disc is mounted through the mounting sleeve, a sealing plate is mounted on one side of the valve disc, a channel ring is provided at the edge of a channel opening in the housing, a negative pressure suction mechanism is mounted on the housing, and a buffer speed control mechanism is mounted on the rotary buffer mechanism. The control mechanism analyzes the pressure value, speed and rotation angle information, and automatically controls the negative pressure suction mechanism to operate stably according to the closing condition and the pressure condition of the valve disc; and according to the feedback speed condition, analyzes the opening and closing speed and position condition of the valve disc, and adaptively controls the buffer speed control mechanism and the torque adjustment mechanism to adjust the speed, so that the valve opening action is executed thoroughly and the valve opening and closing response is timely.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, and in particular relates to a ball-through swing check valve. Background Art

[0002] A swing check valve, also known as a one-way valve or non-return valve, prevents backflow of media in a pipeline. A check valve is a valve whose opening and closing mechanism automatically opens and closes based on the flow and force of the media to prevent backflow. Check valves are automatic valves primarily used in pipelines with unidirectional flow, allowing the media to flow in only one direction to prevent accidents.

[0003] The invention patent application, application publication number CN116201931A, discloses a ball-type swing check valve with a soft-hard composite seal and a damping device. The valve comprises a valve body, a valve shaft mounted therein, a rocker connected to the valve shaft, a valve disc connected thereto, a hard-sealed valve seat mounted therein, a soft-sealed valve seat and a valve seat pressure ring mounted thereon, the soft-sealed valve seat mounted between the hard-sealed valve seat and the valve seat pressure ring, a damping and buffering device connected to the valve shaft, the damping and buffering device comprising a damping cylinder body, at least two needle valves mounted thereon. The valve seat pressure ring is fixedly connected to the hard-sealed valve seat by bolts, the hard-sealed valve seat is provided with a mounting groove for accommodating the soft-sealed valve seat, and the valve seat pressure ring is provided with an arcuate sealing surface for securing the soft-sealed valve seat. The damping cylinder body is connected to the valve shaft, which is fitted with a coupling sleeve. The end of the valve shaft is connected to the damping cylinder shaft, which is mounted within the damping cylinder body and connected to a counterweight mechanism. This counterweight mechanism includes a counterweight rod connected to the damping cylinder shaft, which in turn is connected to a counterweight block. A valve cover is mounted on the valve body, with a valve cover sealing ring interposed between the valve cover and the valve body.

[0004] It can be seen that this type of soft and hard composite seal ball swing check valve with damping device adopts a soft sealing valve seat that is pressed into the hard sealing valve seat through a valve seat pressure ring to form a combination of a hard sealing valve seat and a soft sealing valve seat to achieve a soft and hard composite seal; and under the buffering action of the damping device, the valve is opened and closed slowly, avoiding the valve disc from closing quickly or opening vigorously to impact the hard sealing valve seat, soft sealing valve seat and valve body wall due to excessive fluid flow rate, resulting in valve disc bending, valve disc sealing surface damage, hard sealing valve seat sealing surface damage, soft sealing valve seat sealing surface damage and valve body wall rupture, thereby further extending the service life of the valve.

[0005] However, this type of swing check valve is usually used in scenarios where high-pressure media are used. Due to the operation of the preceding equipment, the valve disc is prone to instantaneous high-pressure impact. In this case, the soft-sealed valve seat will be compressed due to the impact. Due to the instantaneous return to normal pressure, the soft-sealed valve seat will rebound instantaneously, resulting in a flow gap between it and the hard-sealed valve seat. At this time, when the pressure of the return medium can overcome the force of the damping device and the counterweight, it is easy to pass through the gap and continuously expand the gap, causing irreversible backflow.

[0006] The equipment for conveying the medium at the front end usually adopts constant pressure conveying. In this process, the pressure and flow of the medium conveyed to the swing check valve vary due to the influence of the density and viscosity of the medium. This causes the pressure under which the valve disc is normally opened to vary. When overcoming the force of the damping device and the configuration block, the valve disc opening amount and the corresponding upward turning speed vary. Influenced by the density and viscosity of the medium, when the medium supply is cut off, the downward turning speed of the valve disc will be slightly affected even under the influence of the damping device. Under these influences, the swing check valve may not open completely and respond in time, and may also fail to respond in time when closing the valve. Summary of the Invention

[0007] The object of the present invention is to provide a ball-through swing check valve to solve the problems existing in the prior art.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: a ball-type swing check valve, comprising a housing, a valve cover sealed and mounted on an inspection port on the top of the housing, a lifting ring mounted on the top of the valve cover, a shaft housing disposed on one side of the upper portion of the housing, a rotary shaft rotatably disposed in the shaft housing, and a support sleeve mounted on the rotary shaft; a handle arm is connected to one side of the support sleeve, one end of the handle arm is connected to a mounting sleeve and a valve disc is mounted through the mounting sleeve, a sealing plate is mounted on one side of the valve disc, a channel ring is provided at an edge of a channel opening in the housing, a negative pressure suction mechanism is mounted on the housing, and a sealing mechanism is mounted on the sealing plate, the negative pressure suction mechanism being used to adsorb the sealing mechanism so that the sealing mechanism is tightly clamped to the channel ring;

[0009] A rotation buffer mechanism is mounted on the housing, the rotation buffer mechanism is connected to the rotating shaft, a buffer speed control mechanism is mounted on the rotation buffer mechanism, the rotation buffer mechanism is used to buffer the rotation speed of the rotating shaft, and the buffer speed control mechanism is used to control the buffering degree of the rotation buffer mechanism;

[0010] The speed and amount detection mechanism is installed on the buffer speed control mechanism, and the speed and amount detection mechanism is connected to the rotation buffer mechanism. The speed and amount detection mechanism is used to detect the speed and amount of rotation of the rotating shaft in real time;

[0011] The speed detection mechanism is equipped with a torque adjustment mechanism, which is used to provide different auxiliary forces for the valve disc to flip down;

[0012] A control mechanism is installed on one side of the rotary buffer mechanism, and the control mechanism is used to control the operation of the negative pressure suction mechanism, the buffer speed control mechanism, and the torque adjustment mechanism.

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

[0014] The ball-type swing check valve in the present invention enables the sealing mechanism to be stably adsorbed on the channel ring through the adsorption cooperation of the negative pressure suction mechanism on the sealing mechanism, thereby effectively overcoming the rebound of the sealing plate due to the impact of medium backflow, and making the sealing plate more tightly sealed to the channel ring.

[0015] The rotary buffer mechanism buffers the rotation speed of the rotating shaft. The rotary buffer mechanism can slow down the opening and closing speeds of the valve disc and effectively buffer the impact. By setting the buffer speed control mechanism, the buffering degree of the rotary buffer mechanism is controlled, and the reaction degree of the rotary buffer mechanism and the opening and closing speeds of the valve disc can be controlled.

[0016] The pressure value is fed back by the negative pressure suction mechanism, while the speed and angle information are fed back by the speed detection mechanism. The control mechanism then analyses the pressure value, speed and angle information, and automatically controls the negative pressure suction mechanism for stable operation according to the valve flap closing condition and the pressure condition. The opening and closing speed and position of the valve flap are analysed according to the speed condition fed back, and the buffer speed control mechanism and the torque adjustment mechanism are adaptively controlled to adjust the speed, so that the valve opening action is executed thoroughly and the valve opening and closing response is timely. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main view of the present invention;

[0018] Figure 2 for Figure 1 A partial cross-sectional diagram of

[0019] Figure 3 for Figure 1 A partial schematic diagram of a top view cut at AA of FIG.

[0020] Figure 4 for Figure 2 A schematic diagram of the structure at point a is enlarged;

[0021] Figure 5 for Figure 1 Schematic top view of

[0022] Figure 6 for Figure 5 A partial cross-sectional diagram of

[0023] Figure 7 for Figure 5 Schematic diagram of the cross section at BB;

[0024] Figure 8 for Figure 6 A partial cross-sectional diagram of

[0025] Figure 9 Schematic diagram of the torque adjustment mechanism of the present invention;

[0026] Figure 10 This is a schematic diagram of the connections between modules in the development board of the present invention.

[0027] In the figure: 1 housing, 2 valve cover, 3 lifting ring, 4 shaft housing, 5 rotating shaft, 6 support sleeve, 7 arm, 8 mounting sleeve, 9 valve disc, 10 sealing plate, 11 channel ring, 12 convex ring, 13 pressure convex ring, 14 ring cavity, 15 retaining ring 1, 16 ring cavity, 17 pressure sensor, 18 retaining ring 2, 19 row channel, 20 one-way valve, 21 air pipe 1, 22 gas reversing valve, 23 air pipe 2, 24 mounting plate, 25 vacuum pump, 26 support cylinder, 27 cylinder body, 28 inner column, 2 9 Pressure sealing ring, 30 Coupling 1, 31 Ring block, 32 Sealing piece, 33 Guide cavity, 34 Connecting port, 35 Coupling 2, 36 Top cover, 37 Connecting hose, 38 Connector, 39 Manual speed regulating valve, 40 Oil reversing valve, 41 Through pipe, 42 Oil storage cylinder, 43 Speed ​​sensor, 44 Coupling 3, 45 Bushing, 46 Supporting plate, 47 Guide plate, 48 Electric telescopic rod, 49 Supporting slide block, 50 Counterweight, 51 Connecting frame, 52 Encoder, 53 Control box, 54 Development board, 55 PLC controller, 56 Driver, 57 Integrated relay. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9, a ball-type swing check valve comprises a shell 1, the top of the shell 1 is fixed by means of annular bolts and nuts, an oil-soaked asbestos packing ring is pressed between the top of the shell 1 and the valve cover 2, and an extension ring is integrally provided at the bottom of the valve cover 2, and a rubber sealing ring is pressed against the outer edge of the extension ring and the inner wall of the shell 1; a threaded locking ring 3 is provided on the top of the valve cover 2, a shaft housing 4 is integrally provided on the left side of the upper part of the shell 1, a sealing bearing is interference-inserted into the shaft housing 4, and the inner ring of the sealing bearing is interference-inserted into the rotating shaft 5, and a support sleeve 6 is keyed to the rotating shaft 5; a handle arm 7 is integrally provided on one side of the support sleeve 6, one end of the handle arm 7 is bolted to the mounting sleeve 8 and the valve disc 9 is bolted to the mounting sleeve 8, the cover surface of the valve disc 9 adopts an annular buckle groove to tightly buckle the annular buckle of the sealing plate 10, and the center and outer edge areas of the sealing plate 10 are fastened to the valve disc 9 by bolts; the material of the sealing plate 10 is chloroprene rubber;

[0030] A channel ring 11 is integrally provided at the edge of a channel opening in the housing 1. A negative pressure suction mechanism is installed on the housing 1, and a sealing mechanism is installed on the sealing plate 10. The negative pressure suction mechanism is used to adsorb the sealing mechanism so that the sealing mechanism is tightly attached to the channel ring 11.

[0031] By cooperating with the negative pressure adsorption of the sealing mechanism by the negative pressure suction mechanism, the sealing mechanism is stably adsorbed on the channel ring 11, thereby effectively overcoming the rebound of the sealing plate 10 due to the impact of medium backflow, and making the sealing plate 10 more tightly sealed to the channel ring 11.

[0032] A rotary buffer mechanism is mounted on the housing 1 and connected to the rotary shaft 5. A buffer speed control mechanism is mounted on the rotary buffer mechanism and is used to buffer the rotation speed of the rotary shaft 5. The buffer speed control mechanism is used to control the buffering degree of the rotary buffer mechanism.

[0033] The rotary buffer mechanism can slow down the opening and closing speeds of the valve flap 9 and effectively buffer the impact, while the setting of the buffer speed control mechanism can control the reaction degree of the rotary buffer mechanism and the opening and closing speeds of the valve flap 9.

[0034] The speed and amount detection mechanism is installed on the buffer speed control mechanism, and the speed and amount detection mechanism is connected to the rotation buffer mechanism. The speed and amount detection mechanism is used to detect the speed and amount of rotation of the rotating shaft 5 in real time;

[0035] The speed and amount of the rotating shaft 5 are detected in real time by the speed and amount detection mechanism, thereby providing conditions for adjusting the buffer speed control mechanism and the torque adjustment mechanism.

[0036] A torque regulating mechanism is installed on the speed detection mechanism, and the torque regulating mechanism is used to provide different auxiliary forces for the valve disc 9 to turn downward;

[0037] A control mechanism is installed on the right side of the rotary buffer mechanism, and the control mechanism is used to control the operation of the negative pressure suction mechanism, the buffer speed control mechanism, and the torque adjustment mechanism.

[0038] See Figure 2 、 Figure 4 The middle part of the sealing plate 10 is integrated with a pressure-sealing convex. When the valve disc 9 is flipped and pressed against the channel ring 11, the pressure-sealing convex is pressed into the channel ring 11. At this time, the pressure-sealing convex and the inner edge of the right end of the channel ring 11 form a first seal; a convex ring 12 is integrally provided on the sealing plate 10 and located on the outer edge of the pressure-sealing convex. The convex ring 12 is an original ring structure with a semicircular cross-section. The convex ring 12 is pressed tightly into the convex ring grooves evenly arranged at the end of the channel ring 11. The second seal is formed by the cooperation of multiple convex rings 12 and the convex ring grooves.

[0039] A retaining ring 15 is integrally provided on the outer edge of the valve disc 9 and the sealing plate 10 is located in the retaining ring 15. At this time, the retaining ring 15 is pressed tightly against the outer edge of the port of the channel ring 11, effectively supporting the outer edge of the channel ring 11, so that the sealing plate 10 is pressed against the channel ring 11 more stably, and when the sealing plate 10 is pressed against the channel ring 11, it is supported by the retaining ring 15 and the sealing plate 10 is compressed and cannot expand outward, thereby making the convex ring 12 and the convex ring groove fit more densely.

[0040] See Figure 4 The sealing mechanism includes a convex ring 13 arranged on the sealing plate 10 and located at the outer edge of the convex ring 12. The convex ring 13 is a circular ring structure with a semicircular cross-section. A ring cavity 14 is provided in the sealing plate 10 and corresponding to the position of the convex ring 13. The ring cavity 14 is an annular cavity structure with a circular cross-section.

[0041] Under the setting of the ring inner cavity 14, the negative pressure suction mechanism receives the negative pressure adsorption, providing conditions for the convex ring 13 to extend into the negative pressure adsorption mechanism, so that the convex ring 13 can effectively be adsorbed and cooperated with the negative pressure adsorption mechanism, and has strong stability.

[0042] See Figure 2 、 Figure 4 、 Figure 5 and Figure 6 The negative pressure suction mechanism includes a support groove and an annular cavity 16 provided in the channel ring 11, a pressure sensor 17 is fixed with screws in the support groove, a retaining ring 18 is slidably inserted in the support groove and located on the pressure-sensing surface of the pressure sensor 17, the retaining ring 18 is screwed to the pressure-sensing surface of the pressure sensor 17, the pressure sensor 17 is a pressure-sensitive annular pressure sensor, 30 discharge channels 19 are evenly arranged in the annular direction in the retaining ring 18, the discharge channel 19 is an L-shaped channel, and the annular cavity 16 is connected to the discharge channel 19; a one-way valve 20 is screwed in the discharge channel 19, and a press-in groove is provided at the right end of the retaining ring 18, which is a semicircular annular groove in cross section. When the valve disc 9 is flipped and pressed against the channel ring 11, the pressure convex ring 13 is pressed into the press-in groove;

[0043] The rear side of the shell 1 is screwed to fix the mounting plate 24, and the mounting plate 24 is screwed to fix the gas reversing valve 22. The gas reversing valve 22 is a four-position three-way reversing valve. One side of the gas reversing valve 22 is connected to the annular cavity 16 through the air pipe 1 21, and the other side of the gas reversing valve 22 is connected to the vacuum pump 25 through the air pipe 2 23. The vacuum pump 25 is fixedly mounted on the mounting plate 24 with bolts.

[0044] The starting pressure value and the stopping pressure value of the vacuum pump 25 are adjusted. When the gas reversing valve 22 receives the instruction, the air pipe 1 21 and the air pipe 2 23 can be connected and disconnected. When the air pipe 1 21 and the air pipe 2 23 are connected, the vacuum pump 25 will start, so that the air between the pressure convex ring 13 and the pressing groove is sucked away, and the pressure convex ring 13 is stably adsorbed in the pressing groove, so that the sealing plate 10 and the channel ring 11 cooperate to achieve three-line sealing. The most important thing is that when the medium refluxes instantaneously, the sealing plate 10 will not produce a gap with the channel ring 11 due to rebound.

[0045] See Figure 5 、 Figure 6 、 Figure 7 and Figure 8 The rotary buffer mechanism includes a support tube 26 fixed at the end of the shaft housing 4 with an annular bolt, and the rear end of the support tube 26 is locked and fixed to the cylinder body 27 with an annular bolt nut, and the mating surfaces of the support tube 26 and the cylinder body 27 are finely polished, and the outer edges are respectively pressed against the pressure sealing ring 29 and the graphite copper sealing ring to ensure the sealing performance of the two. The pressure sealing ring 29 is made of chloroprene rubber, and the inner column 28 is installed in the cylinder body 27. The inner wall of the cylinder body 27 and the outer wall of the inner column 28 are finely polished, and the following conditions must be met: the two have good sealing performance, and the cylinder body 27 can rotate stably in the inner column 28; the front center position of the inner column 28 is connected to the connecting shaft 30 with an interference key, and the connecting shaft 30 is interference-fitted into the sealing bearing, and the sealing bearing is interference-fitted into the bearing groove set at the center position of the upper end of the support tube 26;

[0046] A guide cavity 33 is defined on the right side of the inner column 28. This is an arc-shaped hollow cavity, the same length from front to back as the inner column 28. A ring block 31 is integrally provided on the right side of the cylinder body 27. This ring block 31 is the same length from front to back as the inner column 28 and is inserted into the guide cavity 33. A sealing piece 32 is embedded in the inner wall of the ring block 31, the same length from front to back as the retaining ring 31. This sealing piece 32 is an arc-shaped piece made of graphite copper and presses against the inner wall of the guide cavity 33. The thickness and size of this sealing piece 32 ensure a good seal between the sealing piece 32 and the inner wall of the guide cavity 33, ensuring stable rotation of the inner column 28. A connecting port 34 is provided at the front end of the cylinder body 27. The two spaces in the guide cavity 33, separated by the ring block 31, are connected to the connecting port 34. This connecting port 34 is used to discharge hydraulic oil into and out of the guide cavity 33.

[0047] The hydraulic oil on one side is discharged, and the hydraulic oil on the other side is discharged, and the inner column 28 rotates in the other direction.

[0048] See Figure 5 、 Figure 6 and Figure 8 The buffer speed control mechanism includes a top cover 36 bolted to the rear end of the cylinder body 27. Two joints 38 are screwed on the right side of the top cover 36. The joint 38 is a hydraulic single-wire joint. The left end of the joint 38 is installed with a connecting hose 37. The connecting hose 37 is installed with a double-wire joint and is sealed and screwed with the connecting port 34 through the double-wire joint. The right end flange of the joint 38 is connected to the manual speed regulating valve 39. The interface end flange of the manual speed regulating valve 39 is connected to the oil reversing valve 40. The oil reversing valve 40 is a three-position four-way hydraulic oil reversing valve. The right side access end flange of the oil reversing valve 40 is connected to the through pipe 41. The through pipe 41 and the oil storage cylinder 42 are an integral part and are connected to each other. The top bolt of the oil storage cylinder 42 fixes the cylinder cover, and the oil storage cylinder 42 is filled with hydraulic oil occupying two-thirds of its space.

[0049] The manual speed regulating valve 39 is used to adjust the liquid flow rate sucked in and discharged between the units, thereby realizing speed regulation of the buffer rotation operation of the rotary buffer mechanism, and the oil reversing valve 40 is controlled to realize the control of the hydraulic oil inflow and outflow of the two spaces of the guide cavity 33.

[0050] See Figure 6 and Figure 8 The speed and amount detection mechanism includes a connecting shaft 2 35 connected to the center position of the rear end of the inner column 28 by an interference key, a double-layer bearing groove is set on the top of the cylinder body 27, and sealed bearings are inserted in the bearing grooves by interference, and the connecting shaft 2 35 is inserted into the inner ring of the sealed bearing by interference and passes through the top of the cylinder body 27; the speed sensor 43 is fixed with screws in the top cover 36, and the front end flange of the dynamic shaft of the speed sensor 43 is connected to the upper end of the connecting shaft 2 35. The connecting shaft 3 44 is rotatably set at the rear center position of the top cover 36, and the front end flange of the connecting shaft 3 44 is connected to the rear end of the dynamic shaft of the speed sensor 43. The rear end of the top cover 36 is bolted to the connecting frame 51, and the encoder 52 is screwed on the connecting frame 51. The encoder 52 is an angle encoder, and the dynamic shaft of the encoder 52 passes through the connecting frame 51 and is connected to the rear end center position of the connecting shaft 3 44 by an interference key.

[0051] The rotation speed of the rotating shaft 5 is measured by the rotation speed sensor 43 , and the rotation angle of the rotating shaft 5 is detected by the encoder 52 .

[0052] See Figure 5 、 Figure 6 、 Figure 8 and Figure 9The torque adjustment mechanism includes a socket 45 connected to the connecting shaft 44 by an interference key, and the right side of the socket 45 is bolted to the supporting plate 46. The supporting plate 46 is bolted to the electric telescopic rod 48 and the guide plate 47 in parallel in front and back. The top rod flange of the electric telescopic rod 48 is connected to the bearing slider 49. The bearing slider 49 is a T-shaped slider. A guide strip opening is opened on the guide plate 47. The bearing slider 49 slides out of the guide strip opening and is bolted to the counterweight block 50. The weight of the counterweight block 50 needs to meet the following requirements: when the medium with normal pressure enters the shell 1 and the bearing slider 49 is located at the leftmost side of the guide strip opening, the medium can effectively support the valve disc 9 from the left side to the top receiving space of the shell 1.

[0053] Through the operation of the electric telescopic rod 48, the counterweight block 50 can be driven to move laterally, thereby effectively changing the side lever torque, and the valve flap 9 can be driven to flip down with different forces, and different rotational resistances can be brought to the upward opening of the valve flap 9.

[0054] See Figure 5 、 Figure 6 and Figure 8 The control mechanism includes a control box 53 fixed by bolts on the right side of the support cylinder 26, the development board 54 is fixed by screws using insulating pads on the inner bottom of the control box 53, and a PLC controller 55 is embedded on the box cover of the control box 53. The PLC controller 55 and the development board 54 are powered by different external batteries respectively; the driver 56 is fixed by screws on the control box 53 and below the PLC controller 55, and the integrated relay 57 is fixed by screws on the inner bottom of the control box 53.

[0055] The signal output end of the PLC controller 55 is connected to the signal input end of the driver 56 through a signal line, and the potential control input end of the PLC controller 55 is connected to the various potential controlled ends of the integrated relay 57 through a cable; the power control input end of the driver 56 is connected to the power controlled end of the electric telescopic rod 48 through a cable, and the main power line of the driver 56 is connected to the external power supply; the various control output piles of the integrated relay 57 are connected to the various control potential terminals of the gas reversing valve 22 and the oil reversing valve 40 through cables.

[0056] See Figure 10 The development board 54 is provided with an encoding signal receiving module, a speed signal receiving module and a pressure signal receiving module. The encoding signal receiving module is used to receive the angle pulse signal of the encoder 52 in real time and convert it into a specific angle value; the speed signal receiving module is used to receive the speed signal of the speed sensor 43 in real time and convert it into a specific speed value; the pressure signal receiving module is used to receive the pressure signal of the pressure sensor 17 in real time and convert it into a specific pressure value;

[0057] The coding signal receiving module, the speed signal receiving module, and the pressure signal receiving module are connected to the analysis and processing module. The analysis and processing module is used to analyze the real-time input pressure value and angle value to obtain the signal for controlling the operation of the negative pressure suction mechanism. The analysis and processing module is also used to analyze the real-time input angle value and speed value to obtain the signal for controlling the operation of the buffer speed control mechanism and the torque adjustment mechanism.

[0058] The analysis and processing module sets the action pressure value A and the action angle value B, and compares the real-time pressure value a with the real-time angle value b. When the valve flap 9 flips up to the upper receiving space of the shell 1, the angle is set to 0°, where the action angle value B satisfies: the valve flap 9 forms an effective closed state for the channel ring 11. When a≥A value and b<B value, the analysis and processing module does not issue a connection instruction to the relay signal control module; when a≥A value and b≥B value, the analysis and processing module issues a connection instruction to the relay signal control module; under such a setting, the operation of the negative pressure suction mechanism can be controlled to avoid the pressure input caused by the medium pressure; when a<A value and b≥B value, the analysis and processing module issues an error instruction to the PLC controller 55, at which time the control to cut off the medium delivery can be stopped and the swing check valve can be checked;

[0059] The analysis and processing module sets a standard speed value C, compares the real-time speed value C with it, and executes the following three signal processing modes:

[0060] First, if c < C, the execution analysis and processing module sends an oil supply and discharge differential connection control instruction to the relay signal control module 2. After the action is completed, a comparison is performed. If c is still < C, a push rod extension instruction is sent to the steering CNC input module until c = C. If c < C after the steering CNC input module sends the push rod maximum extension state instruction, an error instruction is sent to the PLC controller 55.

[0061] 2. If c=C, the analysis and processing module sends a control instruction to the relay signal control module 2 to maintain the oil input and discharge differential connection or oil discharge direct connection control instruction at this time;

[0062] 3. If c>C, check whether the oil supply and discharge differential connection control command has been issued. If the oil supply and discharge differential connection control command has been issued, issue the oil supply and discharge direct connection control command to the relay signal control module 2. After the action is completed, check whether c>C is still true. If so, check whether the steering CNC input module controls the electric telescopic rod 48 to retract to the minimum state. If so, issue an error command to the PLC controller 55. If not, issue a push rod retraction command to the steering CNC input module.

[0063] If no oil supply and discharge differential connection control command is issued, check whether the steering CNC output module controls the electric telescopic rod 48 to retract to the shortest state. If so, send an error command to the PLC controller 55. If not, send a push rod retraction command to the steering CNC output module.

[0064] The analysis and processing module is bidirectionally connected to the signal receiving module. The signal access end of the PLC controller 55 is connected to the signal access pin of the signal receiving module through a signal line. The signal receiving module is used to feed back the processing process and processing results of the analysis and processing module to the PLC controller 55 in real time, and input the operating instructions and operating parameters issued by the PLC controller 55 to the analysis and processing module;

[0065] The peripheral computer is connected to the signal access terminal of the PLC controller 55 through a transmission line and establishes a data sharing protocol. The processing status of the analysis and processing module can be viewed in real time through the peripheral computer, and the action pressure value A, action angle value B and standard speed value C in the analysis and processing module can be set through the PLC controller 55.

[0066] The analysis and processing module transmits and connects the relay signal control module 1, the relay signal control module 2 and the steering digital control module. The relay signal control module 1 is used to control the operation of the negative pressure suction mechanism, the relay signal control module 2 is used to control the operation of the buffer speed control mechanism, and the steering digital control module is used to control the operation of the torque adjustment mechanism. The signal access pins of the relay signal control module 1, the relay signal control module 2 and the steering digital control module are connected to the signal input end of the PLC controller 55 through a signal line.

[0067] The working principle of this embodiment is as follows:

[0068] Negative pressure suction mechanism and sealing mechanism: With the adsorption cooperation of the negative pressure suction mechanism on the sealing mechanism, the sealing mechanism is stably adsorbed on the channel ring 11, thereby effectively overcoming the rebound of the sealing plate 10 due to the impact of medium backflow, and making the sealing plate 10 more tightly sealed to the channel ring 11.

[0069] Rotational buffer mechanism, buffer speed control mechanism: The rotational buffer mechanism buffers the rotational speed of the rotating shaft 5. The rotational buffer mechanism can slow down the opening and closing speeds of the valve flap 9 and effectively buffer the impact. By setting the buffer speed control mechanism, the buffering degree of the rotational buffer mechanism is controlled, and the reaction degree of the rotational buffer mechanism and the opening and closing speeds of the valve flap 9 can be controlled.

[0070] Torque regulating mechanism: The torque regulating mechanism provides different auxiliary powers for the valve disc 9 to flip downward.

[0071] Control mechanism, speed and rotation amount detection mechanism, negative pressure suction mechanism, rotation buffer mechanism, buffer speed control mechanism and torque adjustment mechanism: the pressure value is fed back by the negative pressure suction mechanism, and the speed and rotation amount detection mechanism feeds back the speed and angle information, so that the control mechanism automatically controls the negative pressure suction mechanism to operate stably based on the pressure value, speed and angle information and the closing condition and pressure condition of the valve disc 9; and according to the feedback speed condition, the opening and closing speed and position condition of the valve disc are analyzed, and the buffer speed control mechanism and the torque adjustment mechanism are adaptively controlled to adjust the speed, so that the valve opening action is executed thoroughly and the opening and closing valve responds in time.

[0072] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A ball-type swing check valve, comprising a housing (1), a valve cover (2) sealed and mounted at an inspection port on the top of the housing (1), a lifting ring (3) mounted on the top of the valve cover (2), a shaft housing (4) mounted on one side of the upper portion of the housing (1), a rotating shaft (5) rotatably mounted in the shaft housing (4), and a support sleeve (6) mounted on the rotating shaft (5); a handle arm (7) is connected to one side of the support sleeve (6), a mounting sleeve (8) is connected to one end of the handle arm (7) and a valve disc (9) is mounted through the mounting sleeve (8), a sealing plate (10) is mounted on one side of the valve disc (9), and a channel ring (11) is provided at the edge of a channel opening in the housing (1), characterized in that: A negative pressure suction mechanism is installed on the housing (1), and a sealing mechanism is installed on the sealing plate (10), wherein the negative pressure suction mechanism is used to adsorb the sealing mechanism so that the sealing mechanism is tightly attached to the channel ring (11); A rotation buffer mechanism is mounted on the housing (1), the rotation buffer mechanism is connected to the rotating shaft (5), a buffer speed control mechanism is mounted on the rotation buffer mechanism, the rotation buffer mechanism is used to buffer the rotation speed of the rotating shaft (5), and the buffer speed control mechanism is used to control the buffering degree of the rotation buffer mechanism; A speed and amount detection mechanism is installed on the buffer speed control mechanism, the speed and amount detection mechanism is connected to the rotation buffer mechanism, and the speed and amount detection mechanism is used to perform real-time detection of the speed and amount of rotation of the rotating shaft (5); A torque regulating mechanism is installed on the speed and amount detecting mechanism, and the torque regulating mechanism is used to provide different auxiliary forces for the valve disc (9) to turn downward; A control mechanism is installed on one side of the rotary buffer mechanism, and the control mechanism is used to control the operation of the negative pressure suction mechanism, the buffer speed control mechanism, and the torque adjustment mechanism.

2. The ball-type swing check valve according to claim 1, characterized in that: A pressure sealing convex is provided in the middle of the sealing plate (10), and when the valve disc (9) is turned over and pressed against the channel ring (11), the pressure sealing convex is pressed into the channel ring (11); a convex ring (12) is provided on the sealing plate (10) and located at the outer edge of the pressure sealing convex, and the convex ring (12) is pressed into the convex ring groove evenly provided at the end of the channel ring (11); a retaining ring (15) is provided on the outer edge of the valve disc (9), and the sealing plate (10) is located in the retaining ring (15).

3. The ball-type swing check valve according to claim 2, characterized in that: The sealing mechanism comprises a convex ring (13) provided on the sealing plate (10) and located at the outer edge of the convex ring (12); a ring inner cavity (14) is provided in the sealing plate (10) at a position corresponding to the convex ring (13).

4. The ball-type swing check valve according to claim 3, characterized in that: The negative pressure suction mechanism comprises a support groove and an annular cavity (16) provided in the channel ring (11); a pressure sensor (17) is provided in the support groove; a retaining ring (18) is provided in the support groove and on the pressure-sensitive surface of the pressure sensor (17); a discharge channel (19) is provided in the retaining ring (18); the annular cavity (16) is communicated with the discharge channel (19); a one-way valve (20) is screwed in the discharge channel (19); a pressing groove is provided at one end of the retaining ring (18); when the valve disc (9) is turned over and pressed against the channel ring (11), the pressure convex ring (13) is pressed into the pressing groove; A mounting plate (24) is provided on the rear side of the housing (1), and a gas reversing valve (22) is mounted on the mounting plate (24). One gas connection end of the gas reversing valve (22) is connected to the annular cavity (16) via a first gas pipe (21), and the other gas connection end of the gas reversing valve (22) is connected to a vacuum pump (25) via a second gas pipe (23). The vacuum pump (25) is mounted on the mounting plate (24).

5. The ball-type swing check valve according to claim 4, characterized in that: The rotary buffer mechanism includes a support cylinder (26) provided at the end of the shaft housing (4), a cylinder body (27) being sealed and installed at one end of the support cylinder (26), a pressure sealing ring (29) being pressed against the outer edges of the support cylinder (26) and the cylinder body (27), an inner column (28) being installed in the cylinder body (27), a connecting shaft (30) being connected at the center position of one end of the inner column (28), and the connecting shaft (30) being rotatably provided at the center position of one end of the support cylinder (26); A guide cavity (33) is provided on one side of the inner column (28), a ring block (31) is provided on one side of the cylinder body (27), and the ring block (31) is inserted into the guide cavity (33), a sealing piece (32) is provided on the inner wall of the ring block (31), and the sealing piece (32) is pressed against the inner wall of the guide cavity (33), and a connecting port (34) is provided at one end of the cylinder body (27), and the two spaces of the guide cavity (33) separated by the ring block (31) are respectively connected to the connecting port (34), and the connecting port (34) is used to discharge hydraulic oil into the guide cavity (33) and also to discharge the hydraulic oil in the guide cavity (33).

6. The ball-type swing check valve according to claim 5, characterized in that: The buffer speed control mechanism comprises a top cover (36) arranged at one end of the cylinder body (27), a connector (38) being installed on one side of the top cover (36), one end of the connector (38) being connected to the connection port (34) through a connecting hose (37), the other end of the connector (38) being connected to a manual speed regulating valve (39), the interface end of the manual speed regulating valve (39) being connected to an oil reversing valve (40), and one side access end of the oil reversing valve (40) being connected to an oil storage cylinder (42) through a through pipe (41).

7. The ball-type swing check valve according to claim 6, characterized in that: The speed and amount detection mechanism includes a second connecting shaft (35) connected to the center position of the other end of the inner column (28), the second connecting shaft (35) passes through the cylinder body (27) and is rotatably arranged on the cylinder body (27), a speed sensor (43) is arranged in the top cover (36), one end of the moving shaft of the speed sensor (43) is connected to one end of the second connecting shaft (35), a third connecting shaft (44) is rotatably arranged at the center position of one side of the top cover (36), one end of the third connecting shaft (44) is connected to the other end of the moving shaft of the speed sensor (43), a connecting frame (51) is installed on the top cover (36), an encoder (52) is arranged on the connecting frame (51), and the moving shaft of the encoder (52) passes through the connecting frame (51) and is connected to the center position of the other end of the third connecting shaft (44).

8. The ball-type swing check valve according to claim 7, characterized in that: The torque adjustment mechanism includes a sleeve (45) installed on the third connecting shaft (44), a supporting plate (46) is installed on one side of the sleeve (45), an electric telescopic rod (48) and a guide plate (47) are installed in parallel in front and back of the supporting plate (46), the top rod of the electric telescopic rod (48) is connected to a supporting slider (49), a guide bar opening is opened on the guide plate (47), and the supporting slider (49) slides out of the guide bar opening and is connected to a counterweight block (50).

9. The ball-through swing check valve according to any one of claims 7-8, characterized in that: The control mechanism comprises a control box (53) arranged on one side of the support cylinder (26), a development board (54) is arranged on the inner bottom of the control box (53), a PLC controller (55) is embedded on the box cover of the control box (53), a driver (56) is installed on the control box (53) and below the PLC controller (55), and an integrated relay (57) is arranged on the inner bottom of the control box (53).

10. The ball-type swing check valve according to claim 9, characterized in that: The development board (54) is provided with a coding signal receiving module, a speed signal receiving module and a pressure signal receiving module. The coding signal receiving module is used to receive the angle pulse signal of the encoder (52) in real time and convert it into a specific angle value; the speed signal receiving module is used to receive the speed signal of the speed sensor (43) in real time and convert it into a specific speed value; the pressure signal receiving module is used to receive the pressure signal of the pressure sensor (17) in real time and convert it into a specific pressure value; The coding signal receiving module, the speed signal receiving module, and the pressure signal receiving module are connected to the analysis and processing module. The analysis and processing module is used to analyze the real-time input pressure values ​​and angle values ​​to obtain signals for controlling the operation of the negative pressure suction mechanism. The analysis and processing module is also used to analyze the real-time input angle values ​​and speed values ​​to obtain signals for controlling the operation of the buffer speed control mechanism and the torque adjustment mechanism. The analysis and processing module is bidirectionally connected to a signal receiving module, and the signal receiving module is used to feed back the processing process and processing results of the analysis and processing module to the PLC controller (55) in real time, and input the operation instructions and operation parameters issued by the PLC controller (55) into the analysis and processing module; The analysis and processing module is connected to the relay signal control module 1, the relay signal control module 2 and the steering digital control module. The relay signal control module 1 is used to control the operation of the negative pressure suction mechanism, the relay signal control module 2 is used to control the operation of the buffer speed control mechanism, and the steering digital control module is used to control the operation of the torque adjustment mechanism.

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