A buffer filter gate valve

Abstract

The present invention relates to the field of valve technology, and provides a buffer filtering gate valve capable of buffering a water flow with a high flow velocity when a gate plate is opened, so as to reduce damage to a buffer pipeline or downstream connecting equipment. The buffer filtering gate valve comprises a valve body, an inlet end and an outlet end arranged on the valve body, a gate plate arranged on the valve body, a positioning plate arranged on the valve body, a flow through hole opened on the positioning plate, a rotating column arranged on the positioning plate, a contact plate arranged on the rotating column, an inner arc concave surface arranged on the contact plate, an outer arc convex surface arranged on the contact plate, a positioning rod arranged on the positioning plate, a hinged plate arranged on the rotating column, a first groove opened on the contact plate, a second groove opened on the rotating column, an elastic pull rope arranged between the contact plate and the rotating column, and a limiting plane arranged on the contact plate; the elastic pull rope comprises a first rope body arranged on the contact plate, a second rope body arranged on the rotating column, and an elastic sphere arranged between the first rope body and the second rope body.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a buffer filtering gate valve. Background Art

[0002] A gate valve is a valve whose opening and closing part is a gate, and the movement direction of the gate is perpendicular to the direction of the fluid. Gate valves can only be used for full opening and full closing in pipelines, and cannot be used for regulation and throttling. They are widely used in many industrial fields, mainly including oil and gas, chemical industry, electric power, water treatment, metallurgy, papermaking, food and beverage industries, etc.

[0003] Gate valves are widely used in water treatment, mainly for fluid control in various water treatment systems. Gate valves control the flow of media in pipelines through gates. When the gate is in the fully open position, the media can pass smoothly; when the gate is fully closed, the media can be effectively cut off.

[0004] However, when the gate valve is used to transport water in water treatment, the gate in the gate valve is in a fully open state. At this time, the channel in the valve body is in a smooth state, and the water flow area in the valve body is increased, so that the flow rate of the water in the valve body is also increased. However, the gate valve in the prior art cannot buffer the water flow with a high flow rate when the gate is opened, which can easily cause damage to the pipeline or downstream connecting equipment. Summary of the invention

[0005] The purpose of the present invention is to address the defects and shortcomings of the prior art and provide a buffer filter gate valve that can buffer water with a high flow rate when the gate is opened to reduce damage to the buffer pipeline or downstream connecting equipment.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a buffer filter gate valve, comprising a valve body, an inlet end and an outlet end arranged on the valve body, a gate plate which can be lifted and lowered on the valve body, and also comprising a positioning plate fixedly arranged in the inlet end of the valve body, a flow through hole opened on the positioning plate, a rotating column rotatably arranged on the positioning plate and located in the flow through hole, at least two contact plates annularly and equidistantly arranged on the rotating column, an inner arc concave surface arranged on each of the contact plates, an outer arc convex surface arranged on each of the contact plates, at least one positioning rod arranged on the positioning plate and located in the flow through hole, at least two hinged plates fixedly arranged on the rotating column at one end and hingedly connected to the lower left end of each contact plate at the other end, a first groove opened at the lower right end of each of the contact plates, a second groove opened on the rotating column and corresponding to the position of the first groove, an elastic pull rope arranged between each of the contact plates and the rotating column and located in the first groove and the second groove, and a limiting plane arranged on each of the contact plates and connected to the inner arc concave surface;

[0007] The elastic pull rope comprises a first rope body arranged on the contact plate and located in a first groove, a second rope body arranged on the rotating column and located in a second groove, and an elastic ball body arranged between the first rope body and the second rope body.

[0008] The further improvement is that: a positioning sliding hole is provided on the positioning mounting plate, the positioning sliding hole is connected with the flow through hole, the positioning rod can be slidably arranged on the positioning sliding hole, an adjusting sliding hole is provided on the positioning mounting plate, the adjusting sliding hole is connected with the positioning sliding hole, a rubber connecting block is provided on the end of the valve body located at the positioning mounting plate, a threaded hole is penetrated through the rubber connecting block, the threaded hole is connected with the adjusting sliding hole, an adjusting slider is slidably provided on the adjusting sliding hole of the positioning mounting plate, an adjusting screw is threadedly connected in the threaded hole on the rubber connecting block, a return spring is provided in the adjusting sliding hole between the adjusting slider and the positioning mounting plate, the return spring is sleeved on the outside of the positioning rod, the lower end of the adjusting screw abuts against the upper end of the adjusting slider, the upper end of the adjusting screw is provided with a rotating handwheel, and the upper end of the positioning rod is fixedly connected to the lower end of the adjusting slider.

[0009] A further improvement is that: an arc-shaped protrusion is provided on the positioning rod.

[0010] A further improvement is that at least two filter frames are equidistantly arranged in a ring on the rotating column, a water flow through hole is opened on the side end surface of each filter frame, and a filter screen is arranged on each filter frame.

[0011] A further improvement is that: the filter frame and the rotating column are respectively provided with fixing blocks, the two fixing blocks are provided with T-shaped through holes, the side end surface of the filter screen is provided with a T-shaped block, and the T-shaped through hole and the T-shaped block are gap-matched.

[0012] A further improvement is that the elastic sphere is a polyurethane rubber sphere or a natural rubber sphere or a butadiene rubber sphere, a deformation inner cavity is opened on the elastic sphere, an elastic strip is arranged on the elastic sphere in the deformation inner cavity, the elastic strip is a waist drum-shaped strip, and the elastic strip is a polyurethane rubber strip or a natural rubber strip or a butadiene rubber strip.

[0013] A further improvement is that: at least one elastic pull block is provided on the first rope body, the elastic pull block is a polyurethane rubber block or a natural rubber block or a butadiene rubber block, the first rope body is a segmented rope body, the elastic pull block is a conical block, the segmented rope body is fixedly connected to the elastic pull block, a conical waist hole is provided in the elastic pull block, and an inner concave surface is provided at both left and right ends of the elastic pull block.

[0014] A further improvement is that: the first rope body is a nylon rope or a polyester rope.

[0015] A further improvement is that the second rope body is a nylon rope or a polyester rope.

[0016] After adopting the above technical scheme, the beneficial effect of the present invention is as follows: when the gate valve conveys a water flow with a high flow rate, the water flow enters from the inlet end and flows into the flow through hole, so that the water flow impacts the inner arc concave surface of the contact plate, thereby driving the rotating column to rotate positively in the flow through hole through the contact plate, and when the contact plate rotates following the rotating column, the outer arc convex surface of the contact plate contacts the tail of the positioning rod, and as the rotating column continues to rotate, the contact plate is forced to gradually flip around the other end of the hinged plate, and in the process of gradual flipping, the elastic sphere is stretched and deformed by the first rope body and the second rope body to generate elastic potential energy, and when the contact plate is separated from the contact with the positioning rod, the elastic sphere releases the elastic potential energy to drive the contact plate to reset, and the contact plate is pressed on the surface of the rotating column by the impact of the water channel, and the rotating column is driven to rotate by the impact of the water flow on the contact plate, and then the plurality of contact plates are intermittently contacted with the positioning rod, thereby intermittently buffering the water flow with a high flow rate, thereby avoiding damage to the pipeline or downstream connecting equipment due to the impact of the water flow with a high flow rate.

[0017] Further effects: the inner arc concave surface is used to make the contact plate more easily receive the impact force of the water flow when the water flow hits the contact plate, thereby driving the rotating column to rotate; and the outer arc convex surface can make the water flow more easily dispersed on the contact plate when in contact with the water flow. Through the cooperation of the outer arc convex surface and the inner arc concave surface, the contact plate can keep the rotating column rotating in one direction as much as possible during the process of being impacted by the water flow.

[0018] Further effect: If the water flow impacts the convex surface of the outer arc and drives the rotating column to rotate in the opposite direction, the limiting plane is pressed on the side end surface of the positioning rod. At this time, the contact plate cannot flip around the other end of the hinged plate, thereby limiting the rotating column from continuing to rotate in the opposite direction until the water flow impacts the concave surface of the inner arc and drives the rotating column to rotate forward. The rotating column can be further kept rotating in one direction, allowing the contact plate to flip around the other end of the hinged plate, thereby stretching the elastic pull rope for buffering.

[0019] Further effect: when it is necessary to increase the buffering effect of the contact plate on the water flow, the adjusting screw is turned forward by using a tool to make the adjusting screw press downward to drive the adjusting slider to descend in the adjusting sliding hole. At this time, the reset spring is compressed to generate elastic potential energy, thereby driving the positioning rod to slide downward in the positioning sliding hole. At this time, the contact plate needs to flip around the hinged plate to a larger angle to pass over the positioning rod, thereby stretching the elastic sphere to a greater extent to increase the blocking force against the water flow; if it is necessary to reduce the buffering effect of the contact plate on the water flow, the adjusting screw is turned in the opposite direction to move upward in the threaded hole, and the reset spring releases the elastic potential energy, pushing the adjusting slider in the adjusting sliding hole to drive the positioning rod to rise. At this time, the flipping angle of the contact plate around the hinged plate can be reduced, so that the contact plate can pass over the positioning rod, thereby stretching the elastic sphere to a smaller extent to reduce the blocking force against the water flow.

[0020] Further effect: when the outer arc convex surface of the contact plate contacts the arc-shaped protrusion, the contact plate can rotate with the rotation column through the contact between the arc-shaped surfaces, so that the contact plate can flip around the other end of the hinge plate, so that the contact plate can more easily pass over the positioning rod, reducing the phenomenon of the contact plate being stuck on the positioning rod.

[0021] Further effect: when the water flow impacts the contact plate and drives the rotating column to rotate in the forward direction, the filter frame moves circumferentially on the rotating column, so that the filter screen filters the impurities in the water flow, allowing the impurities to adhere to the filter screen, and the water flow filtered by the filter screen enters the filter frame and flows out from the water flow perforations. The rotation of the rotating column can be coordinated to make the filter screen filter the impurities in the water in a similar way to scooping.

[0022] Further effect: the arrangement of the T-shaped perforation and the T-shaped block can facilitate the removal or installation of the filter screen from the filter frame.

[0023] Further effect: the opened deformation inner cavity can improve the deformation effect of the elastic sphere when the elastic sphere is stretched, so that the elastic sphere can be stretched more easily, and the elastic strip can further improve the resilience of the elastic sphere after the elastic sphere is stretched.

[0024] Further effect: when the contact plate flips around the other end of the hinged plate, the first rope body pulls the elastic pull block to produce elastic deformation, and the conical elastic pull block and the conical waist hole and inner concave surface can allow the elastic pull block to be longitudinally stretched, thereby improving the deformation capacity of the elastic pull block. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 It is a front view cutaway diagram of the valve body, inlet end, outlet end, positioning plate, and rotating column in the present invention;

[0027] Figure 2 It is a side view of the valve body, the positioning plate, the flow through hole, the rotating column, the contact plate, and the positioning rod in the present invention;

[0028] Figure 3 It is a top view cutaway diagram of the valve body, the positioning plate, the flow perforation, the rotating column, the contact plate, and the positioning rod in the present invention;

[0029] Figure 4It is a top view of the cross-section of the rotating column, the contact plate and the filter frame in the present invention;

[0030] Figure 5 It is a top view cutaway diagram of the filter frame, water flow perforations, and filter screen in the present invention;

[0031] Figure 6 It is a top view of a partial cutaway view of the rotating column, the contact plate, the first groove, and the second groove in the present invention;

[0032] Figure 7 It is a schematic diagram of the structure of the first rope body and the elastic sphere in the present invention;

[0033] Figure 8 It corresponds to Figure 3 A magnified view of part A;

[0034] Fig. 9 It corresponds to Figure 5 Enlarged view of part B.

[0035] Explanation of the accompanying drawings: valve body 1, inlet end 2, outlet end 3, gate plate 4, positioning plate 5, flow perforation 6, rotating column 7, contact plate 8, inner arc concave surface 9, outer arc convex surface 10, positioning rod 11, hinged plate 12, first groove 13, second groove 14, limiting plane 15, first rope body 16, second rope body 17, positioning slide hole 18, adjusting slide hole 19, rubber connecting block 20, threaded hole 21, adjusting slider 22, adjusting screw 23, return spring 24, rotating hand wheel 25, arc convex block 26, filter frame 27, water flow perforation 28, filter screen 29, fixed block 30, T-shaped perforation 31, T-shaped block 32, elastic sphere 33, deformation cavity 34, elastic strip 35, elastic pull block 36, tapered waist hole 37, inner concave surface 38. DETAILED DESCRIPTION

[0036] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0037] See also Figures 1 to 9As shown, the technical solution adopted in this specific embodiment is: a buffer filter gate valve, including a valve body 1, an inlet end 2 and an outlet end 3 arranged on the valve body 1, a gate plate 4 which can be lifted and lowered on the valve body 1, and also includes a positioning plate 5 fixedly arranged in the inlet end 2 of the valve body 1, a flow through hole 6 opened on the positioning plate 5, a rotating column 7 rotatably arranged on the positioning plate 5 and located in the flow through hole 6, at least two contact plates 8 annularly equidistantly arranged on the rotating column 7, an inner arc concave surface 9 arranged on each contact plate 8, and an outer arc convex surface 1 arranged on each contact plate 8. 0, at least one positioning rod 11 disposed on the positioning plate 5 and located in the flow through hole 6, at least two hinged plates 12 with one end fixedly disposed on the rotating column 7 and the other end hingedly connected to the lower left end of each contact plate 8, a first groove 13 opened at the lower right end of each contact plate 8, a second groove 14 opened on the rotating column 7 and corresponding to the position of the first groove 13, an elastic pull rope disposed between each contact plate 8 and the rotating column 7 and located in the first groove 13 and the second groove 14, and a limiting plane 15 disposed on each contact plate 8 and connected to the inner arc concave surface 9;

[0038] The elastic pull rope includes a first rope body 16 disposed in the first groove 13 on the contact plate 8 , a second rope body 17 disposed in the second groove 14 on the rotating column 7 , and an elastic ball 33 disposed between the first rope body 16 and the second rope body 17 .

[0039] The inner arc concave surface 9 and the outer arc convex surface 10 are respectively arranged on the left and right sides of the contact plate 8. The outer shape of the positioning plate 5 is an arc shape, and the shape of the flow perforation 6 is a square. The number of contact plates 8 is two to seven. The more the number, the shorter the interruption time of the water flow buffering. When the water flow hits the contact plate 8, it is easier to push the rotating column 7 to rotate. When the number of contact plates 8 is less, the interruption time of the water flow buffering is longer. The specific number is set in advance according to the use environment or customer needs. The contact plate 8 is arranged along the length direction of the rotating column 7, that is, when the rotating column 7 is arranged longitudinally, each contact plate 8 is also arranged longitudinally on the rotating column 7. If the rotating column 7 is arranged transversely, each contact plate 8 is also arranged transversely on the rotating column 7. The setting of the positioning rod 11 is perpendicular to the setting of the rotating column 7, that is, when the rotating column 7 is set longitudinally, the positioning rod 11 is set horizontally; the number of the positioning rod 11 is at least one, and when the number of the positioning rod 11 is one, the positioning rod 11 is set on the left or right side of the rotating column 7; when the number of the positioning rod 11 is two, the two positioning rods 11 are symmetrically set on the positioning plate 5 with the rotating column 7 as the central axis, and are located on the left and right sides of the rotating column 7; if there are four positioning rods 11, the four positioning rods 11 are divided into two groups, and the two groups of positioning rods 11 are symmetrically set, each group has two positioning rods 11, and the positioning rods 11 in each group are arranged up and down; the length of the positioning rod 11 on the positioning plate 5 is the length of the farthest end of the positioning rod 11 in contact with the farthest end of the contact plate 8 when the rotating column 7 drives the contact plate 8 to rotate. One end of the hinged plate 12 is welded or bonded and fixed on the rotating column 7, and the other end of the hinged plate 12 is hinged to the contact plate 8 through a rotating shaft. The contact plate 8 is located between the other end of the hinge plate 12 and the first groove 13, and there is space between the contact plate 8 and the rotating column 7 for the contact plate 8 to rotate around the other end of the hinge plate 12, and it is in contact with the rotating column 7 on the other side of the first groove 13, thereby limiting the side flipping of the contact plate 8. The first groove 13 and the second groove 14 are arranged obliquely. The first rope body 16, the second rope body 17 and the upper and lower ends of the elastic sphere 33 are fixedly connected by glue or hot melt bonding. In order to reduce the vibration generated by the contact plate 8 and the positioning rod 11 and transmitted to the valve body 1, a buffer layer (rubber layer) can be set between the positioning plate 5 and the valve body 1, or the positioning plate 5 can be directly set to a rubber material.

[0040] The positioning plate 5 is provided with a positioning slide hole 18, which is connected to the flow through hole 6. The positioning rod 11 can be slidably arranged on the positioning slide hole 18. The positioning plate 5 is provided with an adjusting slide hole 19, which is connected to the positioning slide hole 18. The end of the valve body 1 located at the positioning plate 5 is provided with a rubber connecting block 20, and a threaded hole 21 is penetrated through the rubber connecting block 20, which is connected to the adjusting slide hole 19. The positioning plate 5 is provided with an adjusting slide hole 19, which is connected to the adjusting slide hole 19. An adjusting slider 22 is slidably provided on the rubber connecting block 20, an adjusting screw 23 is threadedly connected in the threaded hole 21, a return spring 24 is provided in the adjusting slide hole 19 between the adjusting slider 22 and the positioning plate 5, the return spring 24 is sleeved on the outer side of the positioning rod 11, the lower end of the adjusting screw 23 is in contact with the upper end of the adjusting slider 22, a rotating hand wheel 25 is provided on the upper end of the adjusting screw 23, and the upper end of the positioning rod 11 is fixedly connected to the lower end of the adjusting slider 22.

[0041] The positioning rod 11 is a round rod, the positioning slide hole 18 is a round hole, the adjusting slide hole 19 is a square hole, the adjusting slider 22 is a square block, and the rubber connecting block 20 is installed on the valve body 1 by gluing or fitting. A sealing ring is arranged between the positioning plate 5 and the positioning rod 11, and the sealing ring is arranged in the positioning slide hole 18. The sealing ring can prevent water from flowing from the positioning slide hole 18 to the adjusting slide hole 19 when the positioning rod 11 slides in the positioning slide hole 18. The sealing ring is an O-ring, and an annular inner groove is opened on the side end surface of the positioning rod 11. The arrangement of the sealing ring is as follows: Figure 8 The square-shaped adjusting slider 22 can prevent the adjusting slider 22 from rotating with the adjusting screw 23 in the adjusting slide hole 19, so that the adjusting slider 22 can maintain the longitudinal sliding phenomenon.

[0042] The positioning rod 11 is provided with an arc-shaped protrusion 26. The arc-shaped protrusion 26 is provided on the end surface of the positioning rod 11 close to the contact plate 8, and the arc-shaped protrusion 26 is provided at the contact position with the outer arc convex surface 10 of the contact plate 8 during the rotation process of the rotating column 7. After the positioning rod 11 is installed in the positioning slide hole 18, the arc-shaped protrusion 26 is installed on the positioning rod 11 by gluing.

[0043] At least two filter frames 27 are equidistantly arranged in a ring on the rotating column 7 . A water flow through hole 28 is opened on the side end surface of each filter frame 27 . A filter screen 29 is arranged on each filter frame 27 .

[0044] The filter frame 27 is a "7"-shaped frame. The number of filter frames 27 provided may correspond to the number of contact plates 8 provided, and the filter frame 27 is provided between the contact plates 8. The opening of the "7"-shaped frame is the end face close to the inner arc concave surface 9. The number of water flow perforations 28 provided is at least one.

[0045] The filter frame 27 and the rotating column 7 are respectively provided with fixing blocks 30 , and T-shaped through holes 31 are formed on the two fixing blocks 30 . A T-shaped block 32 is provided on the side end surface of the filter screen 29 , and the T-shaped through hole 31 and the T-shaped block 32 are clearance-matched.

[0046] The elastic sphere 33 is a polyurethane rubber sphere, a natural rubber sphere, or a butadiene rubber sphere. A deformation cavity 34 is provided on the elastic sphere 33. An elastic strip 35 is provided on the elastic sphere 33 in the deformation cavity 34. The elastic strip 35 is a waist drum-shaped strip. The elastic strip 35 is a polyurethane rubber strip, a natural rubber strip, or a butadiene rubber strip.

[0047] The elastic sphere 33, the deformation inner cavity 34, and the elastic strip 35 are integrally formed and can be formed by mold demoulding or 3D integral printing.

[0048] At least one elastic pull block 36 is provided on the first rope body 16. The elastic pull block 36 is a polyurethane rubber block, a natural rubber block, or a butadiene rubber block. The first rope body 16 is a segmented rope body. The elastic pull block 36 is a conical block. The segmented rope body is fixedly connected to the elastic pull block 36. A conical waist hole 37 is provided in the elastic pull block 36. Inner concave surfaces 38 are provided at both left and right ends of the elastic pull block 36.

[0049] The elastic pull block 36 is fixedly connected to the rope body by adhesive or hot-melt fixing. The molecular chain of polyurethane rubber is composed of alternating hard segments and soft segments, which gives it excellent tensile and tear resistance. Its tensile strength is between 30-50MPa, and it has excellent wear resistance and impact resistance. Natural rubber is mainly composed of cis-1,4-polyisoprene, and its stress can be evenly distributed during the stretching process. Vulcanized natural rubber shows extremely high elongation at break (500%~700%) and excellent tear resistance. Butadiene rubber is known for its high elasticity and good crack propagation resistance, and its tensile strength is significantly improved after vulcanization and blending. Its tensile strength is between 15-25MPa. The setting of the tapered waist hole 37 allows the elastic pull block 36 to be more easily deformed in the middle part when it is stretched.

[0050] The first rope body 16 is a nylon rope or a polyester rope. Nylon rope is popular for its excellent wear resistance and tensile strength. It is not only waterproof but also has high strength. Polyester rope is a lightweight and durable rope that can maintain strength in a humid environment and has a long service life. The carrying capacity of polyester rope varies according to different specifications and uses. Some high-quality polyester ropes can withstand a weight of thousands of pounds, which is very suitable for outdoor activities such as camping and mountaineering.

[0051] The second rope body 17 is a nylon rope or a polyester rope.

[0052] The working principle of the present invention is as follows: when the gate valve is conveying a water flow with a high flow rate, the water flow enters from the inlet end 2 and flows into the flow through hole 6, so that the water flow impacts the inner arc concave surface 9 of the contact plate 8, thereby driving the rotating column 7 to rotate positively in the flow through hole 6 through the contact plate 8. When the contact plate 8 rotates following the rotating column 7, the outer arc convex surface 10 of the contact plate 8 contacts the tail of the positioning rod 11. As the rotating column 7 continues to rotate, the contact plate 8 is forced to gradually flip around the other end of the hinge plate 12. During the gradual flipping process, the elastic ball 33 is subjected to The first rope body 16 and the second rope body 17 are stretched and deformed to gradually generate elastic potential energy. When the contact plate 8 is out of contact with the positioning rod 11, the elastic sphere 33 releases the elastic potential energy to drive the contact plate 8 to reset, and the contact plate 8 is pressed on the surface of the rotating column 7 by the impact of the water channel. The rotating column 7 is driven to rotate by the impact of the water flow on the contact plate 8, and then the plurality of contact plates 8 are intermittently in contact with the positioning rod 11, thereby intermittently buffering the water flow with a high flow rate, thereby preventing the pipeline or downstream connection equipment (filter or water pump, etc.) from being damaged by the impact of the water flow with a high flow rate;

[0053] The inner arc concave surface 9 is used to make the contact plate 8 more easily receive the impact force of the water flow when the water flow impacts the contact plate 8, thereby driving the rotating column 7 to rotate; and the outer arc convex surface 10 can make the water flow more easily dispersed on the contact plate 8 when in contact with the water flow. Through the cooperation of the outer arc convex surface 10 and the inner arc concave surface 9, the contact plate 8 can keep the rotating column 7 rotating in one direction as much as possible during the process of being impacted by the water flow;

[0054] If the water flow impacts the outer arc convex surface 10 and drives the rotating column 7 to rotate in the opposite direction, the limiting plane 15 is pressed on the side end surface of the positioning rod 11, and the contact plate 8 cannot turn around the other end of the hinge plate 12 at this time, thereby limiting the rotating column 7 from continuing to rotate in the opposite direction until the water flow impacts the inner arc concave surface 9 and drives the rotating column 7 to rotate forward, which can further keep the rotating column 7 able to rotate in one direction, allowing the contact plate 8 to turn around the other end of the hinge plate 12, thereby stretching the elastic rope for buffering;

[0055] When it is necessary to increase the buffering effect of the contact plate 8 on the water flow, the adjusting screw 23 is turned forward by a tool, so that the adjusting screw 23 presses the adjusting slider 22 downward to descend in the adjusting slide hole 19. At this time, the return spring 24 is compressed to generate elastic potential energy, thereby driving the positioning rod 11 to slide downward in the positioning slide hole 18. At this time, the contact plate 8 needs to flip around the hinge plate 12 to a larger angle before it can pass over the positioning rod 11, thereby stretching the elastic sphere 33 to a greater extent to increase the blocking force against the water flow; if it is necessary to reduce the buffering effect of the contact plate 8 on the water flow, the adjusting screw 23 is screwed in the opposite direction to move upward in the threaded hole 21, and the return spring 24 releases the elastic potential energy, pushing the adjusting slider 22 in the adjusting slide hole 19 to drive the positioning rod 11 to rise. At this time, the flipping angle of the contact plate 8 around the hinge plate 12 can be reduced, so that the contact plate 8 can pass over the positioning rod 11, thereby stretching the elastic sphere 33 to a smaller extent to reduce the blocking force against the water flow;

[0056] When the outer arc convex surface 10 of the contact plate 8 contacts the arc-shaped protrusion 26, the contact plate 8 can rotate along with the rotation column 7 through the contact between the arc-shaped surfaces, so that the contact plate 8 can flip around the other end of the hinge plate 12, so that the contact plate 8 can more easily pass over the positioning rod 11, reducing the phenomenon of the contact plate 8 being stuck on the positioning rod 11;

[0057] When the water flow impacts the contact plate 8 and drives the rotating column 7 to rotate forward, the filter frame 27 moves circumferentially on the rotating column 7, so that the filter screen 29 filters the impurities in the water flow, and the impurities are attached to the filter screen 29. The water flow filtered by the filter screen 29 enters the filter frame 27 and flows out from the water flow perforation 28. In conjunction with the rotation of the rotating column 7, the filter screen 29 can filter the impurities in the water in a similar manner to scooping.

[0058] The T-shaped through hole 31 and the T-shaped block 32 can facilitate the removal or installation of the filter screen 29 from the filter frame 27;

[0059] The deformation inner cavity 34 can improve the deformation effect of the elastic sphere 33 when the elastic sphere 33 is stretched, so that the elastic sphere 33 can be stretched more easily, and the elastic strip 35 can further improve the resilience of the elastic sphere 33 after the elastic sphere 33 is stretched;

[0060] When the contact plate 8 flips around the other end of the hinge plate 12, the first rope body 16 pulls the elastic pull block 36 to produce elastic deformation. The conical elastic pull block 36, the conical waist hole 37 and the inner concave surface 38 can allow the elastic pull block 36 to be stretched longitudinally, thereby improving the deformation ability of the elastic pull block 36.

[0061] The invention is intended to protect the structure of the product. The model of each component is not the content of the invention, and it is also a known technology. Any component on the market that can achieve the above functions of the invention can be selected and applied as a buffer filter gate valve. Therefore, the model and other parameters of the component are not described in detail in the invention. The contribution of the invention lies in the scientific combination of the components.

[0062] The above shows and describes the basic principles and main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents. Anything not described in detail in the present invention is a well-known technology of those skilled in the art.

Claims

1. A buffer filter gate valve, comprising a valve body, an inlet end and an outlet end arranged on the valve body, and a gate plate arranged on the valve body in a liftable manner, characterized in that: The valve body also includes a positioning plate fixedly arranged in the inlet end of the valve body, a flow through hole provided on the positioning plate, a rotating column rotatably arranged on the positioning plate and located in the flow through hole, at least two contact plates annularly and equidistantly arranged on the rotating column, an inner arc concave surface provided on each of the contact plates, an outer arc convex surface provided on each of the contact plates, at least one positioning rod provided on the positioning plate and located in the flow through hole, at least two hinged plates having one end fixedly arranged on the rotating column and the other end hingedly connected to the lower left end of each of the contact plates, a first groove provided on the lower right end of each of the contact plates, a second groove provided on the rotating column and corresponding to the position of the first groove, an elastic pull rope provided between each of the contact plates and the rotating column and located in the first groove and the second groove, and a limiting plane provided on each of the contact plates and connected to the inner arc concave surface; The elastic pull rope comprises a first rope body arranged on the contact plate and located in a first groove, a second rope body arranged on the rotating column and located in a second groove, and an elastic ball body arranged between the first rope body and the second rope body.

2. A buffer filter gate valve according to claim 1, characterized in that: The positioning plate is provided with a positioning sliding hole, the positioning sliding hole is connected with the flow through hole, the positioning rod can be slidably arranged on the positioning sliding hole, the positioning plate is provided with an adjusting sliding hole, the adjusting sliding hole is connected with the positioning sliding hole, a rubber connecting block is provided at the end of the valve body located at the positioning plate, a threaded hole is penetrated through the rubber connecting block, the threaded hole is connected with the adjusting sliding hole, an adjusting slider is slidably arranged on the adjusting sliding hole of the positioning plate, an adjusting screw is threadedly connected in the threaded hole on the rubber connecting block, a return spring is provided in the adjusting sliding hole between the adjusting slider and the positioning plate, the return spring is sleeved on the outside of the positioning rod, the lower end of the adjusting screw abuts against the upper end of the adjusting slider, the upper end of the adjusting screw is provided with a rotating handwheel, and the upper end of the positioning rod is fixedly connected to the lower end of the adjusting slider.

3. A buffer filter gate valve according to claim 1 or 2, characterized in that: The positioning rod is provided with an arc-shaped protrusion.

4. A buffer filter gate valve according to claim 1, characterized in that: At least two filter frames are arranged in an annular manner and equidistantly on the rotating column. A water flow through hole is opened on the side end surface of each filter frame, and a filter net is arranged on each filter frame.

5. A buffer filter gate valve according to claim 4, characterized in that: The filter frame and the rotating column are respectively provided with fixing blocks, the two fixing blocks are provided with T-shaped through holes, the side end surface of the filter screen is provided with a T-shaped block, and the T-shaped through hole is gap-matched with the T-shaped block.

6. A buffer filter gate valve according to claim 1, characterized in that: The elastic sphere is a polyurethane rubber sphere, a natural rubber sphere or a butadiene rubber sphere. A deformation inner cavity is provided on the elastic sphere. An elastic strip is arranged in the deformation inner cavity on the elastic sphere. The elastic strip is a waist drum-shaped strip. The elastic strip is a polyurethane rubber strip, a natural rubber strip or a butadiene rubber strip.

7. A buffer filter gate valve according to claim 1 or 6, characterized in that: At least one elastic pull block is arranged on the first rope body, and the elastic pull block is a polyurethane rubber block, a natural rubber block or a butadiene rubber block. The first rope body is a segmented rope body, and the elastic pull block is a conical block. The segmented rope body is fixedly connected to the elastic pull block, and a conical waist hole is provided in the elastic pull block. Both left and right ends of the elastic pull block are provided with inner concave surfaces.

8. A buffer filter gate valve according to claim 7, characterized in that: The first rope body is a nylon rope or a polyester rope.

9. A buffer filter gate valve according to claim 1, characterized in that: The second rope body is a nylon rope or a polyester rope.

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