Butterfly valve with automatic closing function

Abstract

The invention discloses a butterfly valve with an automatic closing function, and relates to the technical field of self-closing butterfly valves. A valve plate is rotationally installed in a water outlet pipe set, positioning mechanisms are symmetrically arranged on the two sides of a guide mechanism and matched with the guide mechanism in a clamped mode, plugging mechanisms are arranged in an annular valve body and correspond to the positioning mechanisms one to one, and the plugging mechanisms are arranged in a water circulation closed opening in a sliding mode. The lifting rod set is slidably mounted on the annular valve body and slidably matched with the guide mechanism, the valve rod is rotatably mounted on the water outlet pipe set and connected with the valve plate, and the lifting rod set is clamped and matched with the plugging mechanisms on the two sides of the lifting rod set. When water in the water inlet pipeline does not need to be conveyed to the water outlet pipeline, the first electromagnetic valve is opened to exhaust water in the empty water storage part, the water inlet connecting pipe and the water outlet connecting pipe are plugged again through the plugging disc on the plugging mechanism, the valve plate returns to the closed state, and therefore automatic closing of the whole butterfly valve is achieved; and therefore, the automatic closing efficiency of the whole butterfly valve is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of self-closing butterfly valves, and in particular relates to a butterfly valve with an automatic closing function. Background Art

[0002] Butterfly valve, also known as flap valve, can be used for the on-off control of low-pressure pipeline media. Butterfly valve is a valve that uses a disc as a closing piece and rotates around the valve stem to open and close. Butterfly valve can be used for the flow of various media fluids. It mainly plays the role of cutting off and throttling in the pipeline. Traditional butterfly valves are generally composed of a valve body, a valve stem and a turntable.

[0003] After searching, a Chinese patent with publication number CN113236799B discloses a butterfly valve that is easy to disassemble and assemble, which mainly discloses the following contents: it includes: a main body tube and a connecting plate, connecting plates are provided on both sides of the main body tube; a shielding frame, shielding frames are provided on both sides of the lower part of the outer wall of the main body tube; a rotating plate, a rotating plate is rotatably provided on the main body tube; a propulsion mechanism, a propulsion mechanism is provided on the main body tube, and the propulsion mechanism passes through two connecting plates; an opening and closing mechanism, an opening and closing mechanism is connected between the main body tube and the rotating plate.

[0004] Although the above butterfly valve has a self-closing function, it requires the user to hold the pull block all the time after opening the butterfly valve. When the water in the pipe does not need to flow to another pipe, the user releases the pull block on the front side to reset the torsion spring, and the torsion spring drives the rotating piece in the opposite direction to close. At this time, the water in the pipe cannot flow to another pipe temporarily. This self-closing method takes up a lot of time for the user, thereby reducing the efficiency of the self-closing use of the butterfly valve. To this end, we provide a butterfly valve with an automatic closing function to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a butterfly valve with automatic closing function, which solves the problem that the existing butterfly valve self-closing method requires a lot of time for the user, thereby reducing the efficiency of the butterfly valve self-closing use, through the specific structural design of the valve body mechanism, water inlet pipe group, water outlet pipe group, valve plate, guide mechanism, positioning mechanism, blocking mechanism and self-closing mechanism.

[0006] To solve the above technical problems, the present invention is implemented through the following technical solutions: The present invention is a butterfly valve with automatic closing function, including a valve body mechanism, the valve body mechanism includes an annular valve body; an inlet pipe group, the inlet pipe group is fixedly installed on the water inlet end of the annular valve body and the two are coaxially arranged; an outlet pipe group, the outlet pipe group is fixedly installed on the water outlet end of the annular valve body and the two are coaxially arranged, and a valve plate is rotatably installed inside the outlet pipe group; a guide mechanism, the guide mechanism is installed inside the annular valve body and the two are coaxially arranged; a positioning mechanism, the positioning mechanism is symmetrically arranged on both sides of the guide mechanism, and the positioning mechanism is engaged with the guide mechanism, and the positioning mechanism includes A water flow closed port; a blocking mechanism, which is arranged inside the annular valve body and corresponds one-to-one with the positioning mechanism, and the blocking mechanism is slidably arranged inside the water flow closed port; and a self-closing mechanism, which is vertically installed on the annular valve body, and the self-closing mechanism includes a lifting rod group and a valve stem, the lifting rod group is slidably installed on the annular valve body and slidably cooperates with the guide mechanism, and the valve stem is rotatably installed on the water outlet pipe group and connected to the valve plate; a transmission assembly is arranged between the lifting rod group and the valve stem, and the lifting rod group and the valve stem are synchronously rotated by the transmission assembly, the lifting rod group is snap-fitted with the blocking mechanisms on both sides of it, and the up and down movement of the blocking mechanism is realized by the lifting rod group.

[0007] The present invention is further configured such that a mounting frame is fixedly provided on the top of the annular valve body, a hollow water storage portion is fixedly provided on the bottom of the annular valve body, a first flow guide pipe and a second flow guide pipe are respectively connected to the peripheral side surfaces of the hollow water storage portion, and a first solenoid valve is installed on the peripheral side surfaces of the second flow guide pipe.

[0008] The present invention is further configured as follows: the water inlet pipe group includes a water inlet connecting pipe, one end of the water inlet connecting pipe is fixedly installed with a first closed end disk coaxial with the water inlet connecting pipe, the first closed end disk is fittedly arranged on the water inlet end of the annular valve body and the two are connected by fasteners, a third flow guide pipe is arranged at the bottom of the water inlet connecting pipe, the third flow guide pipe is connected to the first flow guide pipe by a flange, and a second solenoid valve is installed on the peripheral side of the third flow guide pipe.

[0009] The present invention is further configured as follows: the water outlet pipe group includes a water outlet connecting pipe, one end of which is fixedly mounted with a second closed end disk coaxial with the water outlet connecting pipe, the second closed end disk is fittedly arranged on the water outlet end of the annular valve body and the two are connected by fasteners, a valve stem connecting seat is installed on the peripheral side of the water outlet connecting pipe, and the valve stem is installed inside the valve stem connecting seat.

[0010] The present invention is further configured as follows: the guide mechanism includes a guide ring body, which is fitly mounted on the inner wall of the annular valve body, a vertical through hole is opened on the peripheral side of the guide ring body, and two limiting sleeve parts are symmetrically fixedly arranged on the inner wall of the guide ring body; the lifting rod group includes a vertical lifting rod, which is slidably fitted inside the vertical through hole and passes through the top of the annular valve body.

[0011] The present invention is further configured such that the positioning mechanism also includes a coaxial positioning disk and a positioning ring, the positioning disk and the positioning ring are fixedly connected by an axial rod, the water flow closed opening is provided on the surface of the positioning disk, the positioning disk and the positioning ring are both fitted on the inner wall of the annular valve body, two positioning members are symmetrically fixedly provided on one side of the positioning disk away from the positioning ring, the positioning members are plugged into and fitted into the corresponding limiting sleeve portion, and a limiting groove is provided inside the water flow closed opening.

[0012] The present invention is further configured as follows: the sealing mechanism includes a movable plate arranged inside the corresponding water flow closed mouth, and limiting sliders are fixedly arranged on opposite sides of the movable plate, and the limiting sliders are slidably fitted inside the corresponding limiting grooves, and one side of the movable plate is connected to a sealing disk through a support rod, and the first closed end disk and the second closed end disk are respectively fitted with the corresponding sealing disks, and a support seat is fixedly arranged on the side of the movable plate away from the sealing disk, and a cylindrical sliding mouth is provided on the surface of the support seat to fit on the peripheral side of the vertical lifting rod, and a linkage groove is provided on the inner wall of the cylindrical sliding mouth.

[0013] The present invention is further configured as follows: a driving rod is fixedly provided on the top of the vertical lifting rod, the driving rod is slidably fitted on the mounting frame, a spiral groove is provided on the peripheral side of the driving rod, a lifting grab ring is fixedly provided on the top of the driving rod, two linkage rods are symmetrically fixedly provided on the peripheral side of the vertical lifting rod, the linkage rods are plugged and fitted in the corresponding linkage grooves, and a piston disk is fixedly provided on the bottom of the vertical lifting rod that is slidably fitted in the hollow water storage part; the transmission assembly includes a first transmission wheel and a second transmission wheel, the first transmission wheel is rotatably set on the top of the mounting frame, a guide member fixed on the inner wall of the first transmission wheel is fitted in the spiral groove, the second transmission wheel is fixedly installed on the top of the valve stem, the first transmission wheel and the second transmission wheel are connected by a transmission belt, a limiting sliding groove is provided on the peripheral side of the valve stem, and a sliding member that fits in the limiting sliding groove is fixed inside the central channel of the valve plate.

[0014] The present invention has the following beneficial effects: 1. In the process of controlling the vertical lifting rod to move upward, the present invention enables the two blocking mechanisms to move upward synchronously with the vertical lifting rod. When the self-closing mechanism is lifted to the required height, the piston disc that moves synchronously with the vertical lifting rod moves to abut against the top of the hollow water storage portion. At this time, the first guide pipe is close to the bottom of the piston disc. Subsequently, the second solenoid valve on the third guide pipe is opened, so that the water in the water inlet pipe enters the hollow water storage portion along the third guide pipe and the first guide pipe and fills the hollow water storage portion. Subsequently, the second solenoid valve is closed to release the external force applied to the lifting gripping ring. As the hollow water storage portion is filled, the water in the hollow water storage portion is filled with water. The full liquid can form an effective support for the piston disc and keep the valve plate in an open state. When there is no need to transport the water in the water inlet pipe to the inside of the water outlet pipe, the first solenoid valve on the second guide pipe can be opened by the controller. During the process of the water in the hollow water storage part being gradually emptied along the second guide pipe, the piston disc begins to gradually move downward. After the water in the hollow water storage part is emptied, the piston disc returns to its initial position, and the sealing discs on the two sealing mechanisms again seal the water inlet connecting pipe and the water outlet connecting pipe, and the valve plate returns to a closed state, thereby realizing the automatic closing of the entire butterfly valve, thereby greatly improving the automatic closing efficiency of the entire butterfly valve.

[0015] 2. The present invention arranges two positioning mechanisms inside the annular valve body, and slides a sealing mechanism inside the water flow closed mouth on the positioning mechanism. At the same time, a valve plate is rotatably installed inside the water outlet connecting pipe. The water inlet connecting pipe is sealed by a corresponding sealing disk, and the water outlet connecting pipe is sealed by a corresponding sealing disk. In combination with the valve plate, the sealing performance of the entire butterfly valve can be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 The figure is a schematic diagram of the structure of a butterfly valve with automatic closing function.

[0018] Figure 2 for Figure 1 The structural front view.

[0019] Figure 3 for Figure 1 Internal structure diagram of the middle ring valve body.

[0020] Figure 4 for Figure 3 The structural front view.

[0021] Figure 5 It is a structural schematic diagram of the valve body mechanism in the present invention.

[0022] Figure 6 It is a structural schematic diagram of the water outlet pipe group in the present invention.

[0023] Figure 7 It is a structural schematic diagram of the water inlet pipe group in the present invention.

[0024] Figure 8 It is a structural schematic diagram of the guide mechanism in the present invention.

[0025] Fig. 9 It is a structural schematic diagram of the positioning mechanism in the present invention.

[0026] Fig.10 It is a structural schematic diagram of the blocking mechanism in the present invention.

[0027] Fig.11 It is a structural schematic diagram of the self-closing mechanism in the present invention.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1-valve body mechanism, 101-annular valve body, 102-mounting frame, 103-hollow water storage part, 104-first guide pipe, 105-second guide pipe, 106-first solenoid valve, 2-water inlet pipe group, 201-water inlet connecting pipe, 202-first closed end plate, 203-third guide pipe, 204-second solenoid valve, 3-water outlet pipe group, 301-water outlet connecting pipe, 302-second closed end plate, 303-valve stem connecting seat, 4-valve plate, 5-guide mechanism, 501-guide ring body, 502-vertical through hole, 503-limit sleeve joint, 6-positioning mechanism, 601-water flow Closed mouth, 602-positioning plate, 603-positioning ring, 604-axial rod, 605-positioning piece, 606-limiting groove, 7-blocking mechanism, 701-movable plate, 702-limiting slider, 703-blocking plate, 704-support seat, 705-column sliding mouth, 706-linking groove, 8-self-closing mechanism, 801-valve stem, 802-vertical lifting rod, 803-driving rod, 804-spiral groove, 805-lifting grab ring, 806-linking rod, 807-piston disc, 808-first transmission wheel, 809-second transmission wheel, 810-transmission belt, 811-limiting slide groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] For specific embodiment 1, please refer to Figure 1-11 The present invention is a butterfly valve with automatic closing function, comprising a valve body mechanism 1, an inlet pipe group 2, an outlet pipe group 3, a guide mechanism 5, a positioning mechanism 6, a blocking mechanism 7 and a self-closing mechanism 8; the valve body mechanism 1 comprises an annular valve body 101; the inlet pipe group 2 is fixedly mounted on the water inlet end of the annular valve body 101 and the two are coaxially arranged; the outlet pipe group 3 is fixedly mounted on the water outlet end of the annular valve body 101 and the two are coaxially arranged, and a valve plate 4 is rotatably mounted inside the outlet pipe group 3; the guide mechanism 5 is mounted inside the annular valve body 101 and the two are coaxially arranged; the positioning mechanism 6 is symmetrically arranged on both sides of the guide mechanism 5, and the positioning mechanism 6 is engaged with the guide mechanism 5, and the positioning mechanism 6 comprises a water flow closed port 601; the blocking mechanism 7 is arranged inside the annular valve body 101 and corresponds to the positioning mechanism 6 one by one, and the blocking mechanism 7 is slidably arranged on the water flow closed port 601 Inside; the self-closing mechanism 8 is vertically installed on the annular valve body 101, and the self-closing mechanism 8 includes a lifting rod group and a valve stem 801. The lifting rod group is slidably installed on the annular valve body 101 and slidably cooperates with the guide mechanism 5, and the valve stem 801 is rotatably installed on the outlet pipe group 3 and connected to the valve plate 4; a transmission assembly is arranged between the lifting rod group and the valve stem 801, and the lifting rod group and the valve stem 801 are synchronously rotated by the transmission assembly, and the lifting rod group is snap-fitted with the sealing mechanism 7 on both sides thereof, and the up and down movement of the sealing mechanism 7 is realized by the lifting rod group.

[0031] In this embodiment of the present invention, a mounting frame 102 is fixedly provided on the top of the annular valve body 101, a hollow water storage portion 103 is fixedly provided on the bottom of the annular valve body 101, a first flow guide pipe 104 and a second flow guide pipe 105 are respectively connected to the side surfaces of the hollow water storage portion 103, and a first solenoid valve 106 is installed on the side surfaces of the second flow guide pipe 105; the water inlet pipe group 2 includes a water inlet connecting pipe 201, which is used to connect to an external water inlet pipe, and a first closed end disk 202 coaxial with the water inlet connecting pipe 201 is fixedly installed on one end of the water inlet connecting pipe 201, the first closed end disk 202 is fitted on the water inlet end of the annular valve body 101 and the two are connected by fasteners (such as fastening bolts), a third flow guide pipe 203 is connected to the bottom of the water inlet connecting pipe 201, the third flow guide pipe 203 is connected to the first flow guide pipe 104 by a flange, and a second solenoid valve 204 is installed on the side surfaces of the third flow guide pipe 203.

[0032] In this embodiment of the present invention, the water outlet pipe group 3 includes a water outlet connecting pipe 301, which is used to connect to an external water outlet pipe. A second closed end disk 302 coaxial with the water outlet connecting pipe 301 is fixedly installed at one end of the water outlet connecting pipe 301. The second closed end disk 302 is fitted on the water outlet end of the annular valve body 101 and the two are connected by fasteners (such as fastening bolts). A valve stem connecting seat 303 is installed on the side surface of the water outlet connecting pipe 301, and the valve stem 801 is installed inside the valve stem connecting seat 303.

[0033] In this embodiment of the present invention, the guide mechanism 5 includes a guide ring body 501, which is fitted on the inner wall of the annular valve body 101, and a vertical through hole 502 is opened on the side surface of the guide ring body 501. Two limiting sleeve parts 503 are symmetrically fixedly arranged on the inner wall of the guide ring body 501; the lifting rod group includes a vertical lifting rod 802, which is slidably fitted in the vertical through hole 502 and passes through the top of the annular valve body 101. By setting the guide ring body 501 at the center position inside the annular valve body 101 and then passing the vertical lifting rod 802 through the vertical through hole 502, the position of the guide ring body 501 inside the annular valve body 101 can be limited.

[0034] In this embodiment of the present invention, the positioning mechanism 6 also includes a coaxial positioning disk 602 and a positioning ring 603, the positioning disk 602 and the positioning ring 603 are fixedly connected by an axial rod 604, the water flow closed port 601 is provided on the surface of the positioning disk 602, the positioning disk 602 and the positioning ring 603 are both fitted on the inner wall of the annular valve body 101, and two positioning members 605 are symmetrically fixedly provided on one side of the positioning disk 602 away from the positioning ring 603, and the positioning members 605 are plugged and matched in the corresponding limit sleeve 5 03, a limiting groove 606 is opened inside the water flow closed mouth 601; after the position of the guide ring body 501 inside the annular valve body 101 is limited, the positioning mechanism 6 is installed inside the annular valve body 101 so that it is close to the guide ring body 501, and the positioning piece 605 is horizontally inserted into the limiting sleeve 503, thereby realizing the position limitation of the positioning mechanisms 6 on the left and right sides inside the annular valve body 101, and then the water inlet pipe group 2 and the water outlet pipe group 3 are installed and fixed to the two sides of the annular valve body 101 to realize the assembly of the entire butterfly valve.

[0035] In this embodiment of the present invention, the blocking mechanism 7 includes a movable plate 701 arranged inside the corresponding water flow closed port 601, and limiting sliders 702 are fixedly arranged on opposite sides of the movable plate 701. The limiting sliders 702 are slidably fitted inside the corresponding limiting grooves 606. One side of the movable plate 701 is connected with a blocking disk 703 through a support rod, and the first closed end disk 202 and the second closed end disk 302 are respectively fitted with the corresponding blocking disk 703 (that is, the water inlet connecting pipe 201 is blocked by the corresponding blocking disk 703, and the water outlet connecting pipe 301 is blocked by the corresponding blocking disk 703, and the valve plate 4 can greatly improve the sealing performance of the entire butterfly valve), and a support seat 704 is fixedly arranged on the side of the movable plate 701 away from the blocking disk 703, and a cylindrical sliding opening 705 is provided on the surface of the support seat 704 to fit on the peripheral side of the vertical lifting rod 802, and a linkage groove 706 is provided on the inner wall of the cylindrical sliding opening 705.

[0036] When it is necessary to transport the water in the water inlet pipe to the inside of the water outlet pipe, the self-closing mechanism 8 is pulled upward to drive the transmission component to rotate, and under the action of the transmission component, the valve stem 801 is driven to rotate synchronously, thereby realizing the synchronous rotation of the valve plate 4. In the process of lifting the self-closing mechanism 8, the blocking mechanism 7 moves upward synchronously with the vertical lifting rod 802, so that the two blocking mechanisms 7 slide upward along the limiting groove 606 at the same time. When the self-closing mechanism 8 is lifted to the required height, the blocking disks 703 on the two blocking mechanisms 7 simultaneously release the blocking of the water inlet connecting pipe 201 and the water outlet connecting pipe 301, and at the same time, the moving plate 701 abuts against the top of the water flow closing port 601. At this time, the valve plate 4 is in a fully open state, thereby realizing the penetration of the entire butterfly valve, and the water in the water inlet pipe. Water can flow through the entire butterfly valve and enter the water outlet pipe; when there is no need to transport the water in the water inlet pipe to the inside of the water outlet pipe, release the external force applied to the self-closing mechanism 8, and under the action of the self-gravity of the self-closing mechanism 8 and the two blocking mechanisms 7, the lifting rod group moves downward to drive the transmission assembly to start reverse rotation, thereby realizing the synchronous reverse rotation of the valve stem 801, and the reverse rotation of the valve stem 801 drives the valve plate 4 to rotate in the opposite direction until the movable plates 701 on the two blocking mechanisms 7 are again against the bottom of the water flow closure 601, at this time, the lifting rod group also completes the downward reset, and the blocking disks 703 on the two blocking mechanisms 7 again realize the blocking of the water inlet connecting pipe 201 and the water outlet connecting pipe 301, and the valve plate 4 returns to the closed state, thereby realizing the self-closing of the entire butterfly valve.

[0037] Specific embodiment 2, on the basis of specific embodiment 1, a driving rod 803 is fixedly provided on the top of the vertical lifting rod 802, and the driving rod 803 is slidably fitted on the mounting frame 102, and a spiral groove 804 is provided on the side surface of the driving rod 803, and a lifting grab ring 805 is fixedly installed on the top of the driving rod 803, and two linkage rods 806 are symmetrically fixedly provided on the side surface of the vertical lifting rod 802, and the linkage rod 806 is plugged into the corresponding linkage groove 706, and the bottom of the vertical lifting rod 802 is fixedly installed with a sliding fit inside the hollow water storage part 103. Piston disc 807; the transmission assembly includes a first transmission wheel 808 and a second transmission wheel 809, the first transmission wheel 808 is rotatably set on the top of the mounting frame 102, the guide member fixed on the inner wall of the first transmission wheel 808 cooperates inside the spiral groove 804, the second transmission wheel 809 is fixedly installed on the top of the valve stem 801, the first transmission wheel 808 and the second transmission wheel 809 are connected by a transmission belt 810, a limiting slide groove 811 is provided on the peripheral side of the valve stem 801, and a sliding member that cooperates in the limiting slide groove 811 is fixed inside the central channel of the valve plate 4.

[0038] When the vertical lifting rod 802 is controlled to move upward by the lifting grab ring 805, the driving rod 803 that moves upward synchronously with the vertical lifting rod 802 drives the first transmission wheel 808 to rotate (through the sliding cooperation of the spiral groove 804 and the guide member on the inner wall of the first transmission wheel 808), and drives the valve stem 801 to rotate synchronously under the action of the transmission belt 810 and the second transmission wheel 809. In the process of controlling the vertical lifting rod 802 to move upward, the valve stem 801 is driven to rotate synchronously by the plug-in connection between the linkage rod 806 and the linkage groove 706. The two blocking mechanisms 7 move upward synchronously with the vertical lifting rod 802. When the self-closing mechanism 8 is lifted to the required height, the piston disc 807 that moves synchronously with the vertical lifting rod 802 moves to abut against the top of the hollow water storage portion 103. At this time, the first guide pipe 104 is close to the bottom of the piston disc 807. Then, the second solenoid valve 204 on the third guide pipe 203 is opened, so that the water in the water inlet pipe flows along the third guide pipe 203 and the first guide pipe 104 into the hollow water storage portion 103. The hollow water storage part 103 is filled with liquid (the butterfly valve is installed at a lower position relative to the water inlet pipe during installation), and then the second solenoid valve 204 is closed to release the external force applied to the lifting grab ring 805. Since the hollow water storage part 103 is filled with liquid, it can form an effective support for the piston disc 807 and keep the valve plate 4 in an open state. When it is not necessary to transport the water in the water inlet pipe to the inside of the water outlet pipe, the first solenoid valve 106 on the second guide pipe 105 is controlled by the controller to open. That is, during the process of the water in the hollow water storage part 103 being gradually emptied along the second guide pipe 105, the piston disc 807 begins to gradually move downward. After the water in the hollow water storage part 103 is emptied, the piston disc 807 returns to its initial position, and the sealing discs 703 on the two sealing mechanisms 7 again seal the water inlet connecting pipe 201 and the water outlet connecting pipe 301, and the valve plate 4 returns to the closed state, thereby realizing the automatic closing of the entire butterfly valve, thereby greatly improving the automatic closing efficiency of the entire butterfly valve.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A butterfly valve with automatic closing function, characterized in that: include: A valve body mechanism, the valve body mechanism comprising an annular valve body; A water inlet pipe assembly, the water inlet pipe assembly is fixedly mounted on the water inlet end of the annular valve body and the two are coaxially arranged; A water outlet pipe assembly, the water outlet pipe assembly is fixedly mounted on the water outlet end of the annular valve body and the two are coaxially arranged, and a valve plate is rotatably mounted inside the water outlet pipe assembly; A guide mechanism, wherein the guide mechanism is installed inside the annular valve body and the two are coaxially arranged; A positioning mechanism, wherein the positioning mechanism is symmetrically arranged on both sides of the guide mechanism, and the positioning mechanism is engaged with the guide mechanism, and the positioning mechanism includes a water flow closure; A blocking mechanism, which is arranged inside the annular valve body and corresponds one-to-one with the positioning mechanism, and is slidably arranged inside the water flow closed port; and a self-closing mechanism, the self-closing mechanism is vertically mounted on the annular valve body, the self-closing mechanism comprises a lifting rod group and a valve stem, the lifting rod group is slidably mounted on the annular valve body and slidably cooperates with the guide mechanism, and the valve stem is rotatably mounted on the water outlet pipe group and connected to the valve plate; A transmission assembly is provided between the lifting rod group and the valve stem, and the lifting rod group and the valve stem are rotated synchronously by the transmission assembly. The lifting rod group is engaged with the blocking mechanisms on both sides thereof, and the blocking mechanisms are moved up and down by the lifting rod group.

2. A butterfly valve with automatic closing function according to claim 1, characterized in that: A mounting frame is fixedly arranged on the top of the annular valve body, a hollow water storage part is fixedly arranged on the bottom of the annular valve body, a first flow guide pipe and a second flow guide pipe are respectively connected to the peripheral side of the hollow water storage part, and a first solenoid valve is installed on the peripheral side of the second flow guide pipe.

3. A butterfly valve with automatic closing function according to claim 2, characterized in that: The water inlet pipe group includes a water inlet connecting pipe, one end of which is fixedly installed with a first closed end disk coaxial with the water inlet connecting pipe, the first closed end disk is fitted at the water inlet end of the annular valve body and the two are connected by fasteners, the bottom of the water inlet connecting pipe is connected with a third guide pipe, the third guide pipe is connected to the first guide pipe by a flange, and a second solenoid valve is installed on the peripheral side of the third guide pipe.

4. A butterfly valve with automatic closing function according to claim 3, characterized in that: The water outlet pipe group includes a water outlet connecting pipe, one end of which is fixedly mounted with a second closed end disk coaxial with the water outlet connecting pipe, the second closed end disk is fittedly arranged at the water outlet end of the annular valve body and the two are connected by fasteners, a valve stem connecting seat is installed on the peripheral side of the water outlet connecting pipe, and the valve stem is installed inside the valve stem connecting seat.

5. A butterfly valve with automatic closing function according to claim 4, characterized in that: The guide mechanism includes a guide ring body, which is fitted on the inner wall of the annular valve body, a vertical through hole is opened on the circumferential side of the guide ring body, and two limiting sleeve parts are symmetrically fixed on the inner wall of the guide ring body; the lifting rod group includes a vertical lifting rod, which is slidably fitted inside the vertical through hole and passes through the top of the annular valve body.

6. A butterfly valve with automatic closing function according to claim 5, characterized in that: The positioning mechanism also includes a coaxial positioning disk and a positioning ring, the positioning disk and the positioning ring are fixedly connected by an axial rod, the water flow closed opening is provided on the surface of the positioning disk, the positioning disk and the positioning ring are both fitted on the inner wall of the annular valve body, two positioning members are symmetrically fixedly provided on one side of the positioning disk away from the positioning ring, the positioning members are plugged into and fitted into the corresponding limiting sleeve portion, and a limiting groove is provided inside the water flow closed opening.

7. A butterfly valve with automatic closing function according to claim 6, characterized in that: The sealing mechanism includes a movable plate arranged inside the corresponding water flow closed port, and limit sliders are fixedly arranged on opposite sides of the movable plate, and the limit sliders are slidably fitted inside the corresponding limit grooves. One side of the movable plate is connected to a sealing disk through a support rod, and the first closed end disk and the second closed end disk are respectively fitted with the corresponding sealing disks. A support seat is fixedly arranged on the side of the movable plate away from the sealing disk, and a cylindrical sliding opening that fits on the peripheral side of the vertical lifting rod is provided on the surface of the support seat, and a linkage groove is provided on the inner wall of the cylindrical sliding opening.

8. A butterfly valve with automatic closing function according to claim 7, characterized in that: A driving rod is fixedly arranged on the top of the vertical lifting rod, and the driving rod is slidably fitted on the mounting frame. A spiral groove is provided on the peripheral side of the driving rod, and a lifting grab ring is fixedly arranged on the top of the driving rod. Two linkage rods are symmetrically fixedly arranged on the peripheral side of the vertical lifting rod, and the linkage rods are plugged and fitted in the corresponding linkage grooves. A piston disk that is slidably fitted in the hollow water storage part is fixedly arranged on the bottom of the vertical lifting rod; The transmission assembly includes a first transmission wheel and a second transmission wheel. The first transmission wheel is rotatably set on the top of the mounting frame. A guide member fixed on the inner wall of the first transmission wheel cooperates with the inside of the spiral groove. The second transmission wheel is fixedly installed on the top of the valve stem. The first transmission wheel and the second transmission wheel are connected by a transmission belt. A limiting slide groove is provided on the peripheral side of the valve stem. A sliding member that cooperates with the limiting slide groove is fixed inside the central channel of the valve plate.

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