Valve for flow control

Abstract

The invention relates to the technical field of valves, in particular to a flow control valve which comprises a driving rod, a plugging plate, a transmission device and an adjusting device. The feeding port and the discharging port of the shell are connected with a pipeline, when the second section of the driving rod is rotated, the first section of the driving rod slides up and down in the shell, and the lower end of the first section is in transmission connection with the plugging plate through a transmission device. When the blocking plate opens the feeding port or the discharging port, the first adjusting assembly promotes the blocking plate to rotate, the contact position of the blocking plate and the feeding port or the discharging port is changed, and friction of the blocking plate at the same position is reduced. And under the action of the second adjusting assembly, the distance between the lower end of the first section of the driving rod and the axis of the plugging plate is changed. The abutting position of the blocking plate and the feeding port or the discharging port is adjusted through the first adjusting assembly and the second adjusting assembly, so that the blocking plate is evenly abraded, and the sealing performance of the blocking plate to the feeding port or the discharging port is improved.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a valve for flow control. Background Art

[0002] As a key control valve, gate valves are widely used in the circulation and cut-off process of liquids, gases, dust and other media. With the continuous advancement of gate valve technology, in order to improve the sealing performance, manufacturers usually design the inlet and outlet of the valve body as bevels, and make the gate plate have a corresponding bevel structure to ensure that it can seal better. In actual use, gate valves have very high requirements for sealing, especially when controlling the circulation of various media. However, the gate plate will wear during the frequent contact with the inlet and outlet, and this wear is mainly concentrated in the annular area coaxial with the inlet and outlet. As time goes by, the wear intensifies and the sealing performance gradually decreases, which eventually affects the normal function of the gate valve and may cause leakage of the medium or control failure. Summary of the invention

[0003] The invention provides a valve for flow control, so as to solve the problem that the gate plate of the existing gate valve is seriously worn after long-term use, resulting in reduced sealing performance.

[0004] A valve for flow control of the present invention adopts the following technical solution: A valve for flow control, comprising a shell, a driving rod, a blocking plate, a transmission device and an adjusting device; the shell is hollow inside and has a feed port and a discharge port; the driving rod comprises a first section that can slide up and down inside the shell and a second section that rotates outside the shell, the first section is transmission-connected with the second section so that when the second section rotates, the first section slides up and down inside the shell; the blocking plate is slidably arranged inside the shell, and the blocking plate is used to simultaneously block or open the feed port and the discharge port; the transmission device is arranged between the first section of the driving rod and the blocking plate so that when the first section of the driving rod slides up and down inside the shell, the blocking plate is urged to The feed port or the discharge port is opened or blocked; the adjusting device includes a first adjusting component and a second adjusting component, the first adjusting component is used to cause the blocking plate to rotate, and change the contact position between the blocking plate and the feed port or the discharge port; the second adjusting component is used to adjust the distance between the axis of the blocking plate and the first section of the driving rod, so as to change the amount by which the blocking plate slides downward by the same amount when the first section of the driving rod rotates, and when the blocking plate blocks the feed port and the discharge port, the contact point between the blocking plate and the feed port or the discharge port is changed, and the contact surface of the blocking plate is evenly ground to always maintain the sealing between the blocking plate and the feed port or the discharge port.

[0005] Furthermore, the transmission device includes a first fixed plate and a second fixed plate; the first fixed plate is fixedly arranged inside the shell, a vertical first slide is opened on the first fixed plate, a first slider is slidably arranged on the first slide, and one end of the first slider is fixedly connected to the blocking plate; the second fixed plate is fixedly arranged inside the shell, and is spaced apart from the first fixed plate, a second slide is vertically arranged on the second fixed plate, a second slider is arranged in the second slide, one end of the second slider is fixedly connected to the first section of the driving rod, and the other end of the second slider is transmission connected to the first slider, so that when the first section of the driving rod slides in the shell, the blocking plate can slide up and down synchronously.

[0006] Furthermore, the first adjusting component includes a first rack, a first adjusting wheel and a first transmission wheel; the first rack is fixedly arranged on the first fixed plate, and the first rack is spaced apart from the first slide; the first adjusting wheel is rotatably arranged on the first slider, and the first adjusting wheel has a first state of meshing with the first rack and a second state of disengaging from the first rack; an adjusting rod is rotatably connected to the rotating shaft of the first adjusting wheel, and the adjusting rod can be slidably connected to the first slider; adjusting blocks are fixedly arranged at both ends of the first slide, so that when the first slider slides to the upper and lower ends of the first slide, the adjusting blocks cause the adjusting rod to slide along the first slider, thereby changing the meshing state of the first adjusting wheel and the first rack; one end of the first transmission wheel is fixedly connected to the axis center of the blocking plate, and the other end of the first transmission wheel can be slidably connected to the rotating shaft of the first adjusting wheel, so that when the first adjusting wheel rotates, the blocking plate rotates.

[0007] Furthermore, the second adjusting component includes an adjusting ring, a second rack and a second adjusting wheel; the first fixed plate can be slidably arranged inside the shell body, so that the first fixed plate can slide left and right in the shell body when the sealing plate opens or blocks the feed port or the discharge port; the second rack is fixedly arranged on the second fixed plate, and the second rack is spaced apart from the second slideway; the second adjusting wheel can be rotatably connected to the second slider, and the second adjusting wheel has a third state of meshing with the second rack and a fourth state of disengagement; one end of the side wall of the adjusting ring is fixedly connected to the first slider, and a second transmission wheel is fixedly connected to the rotating shaft of the second adjusting wheel, and a third transmission wheel is arranged between the second transmission wheel and the inner side wall of the adjusting ring, so that when the second transmission wheel rotates, the third transmission wheel drives the adjusting ring to slide up and down; the second slider is hollow inside, and the rotating shaft of the second adjusting wheel can be slidably and rotatably arranged in the second slider, so that when the first fixed plate slides left and right in the shell body, the meshing state of the second adjusting wheel and the second rack changes.

[0008] Furthermore, a third slideway is circumferentially provided on the side wall of the adjustment ring, a first connecting rod is rotatably connected to the axis of the third transmission wheel, and the other end of the first connecting rod can slide along the third slideway; a second connecting rod is rotatably connected between the rotating shaft of the second transmission wheel and the rotating shaft of the third transmission wheel.

[0009] Furthermore, a reset assembly is arranged in the second slider, the reset assembly includes a piston ring, a damping fluid and a first elastic member, the damping fluid is arranged inside the second slider; the piston ring is slidably arranged in the second slider, the first elastic member is fixedly arranged between the piston ring and the second slider, and the rotating shaft of the second adjusting wheel is rotatably connected to the piston ring, so that when the first fixed plate slides left and right in the shell, the rotating shaft of the second adjusting wheel pushes the piston ring to slide slowly in the second slider.

[0010] Furthermore, the reset assembly also includes a second elastic member, which is arranged between the other end of the piston ring and the second slider; the first elastic member is a first spring; the second elastic member is a second spring; the first spring and the second spring act together to make the piston ring in the middle of the second slider, and the first spring and the second spring are both in a compressed state.

[0011] Furthermore, the cross-sections of the feed port and the discharge port are inclined, and the sealing plate is inclined to improve the sealing performance of the sealing plate to the feed port or the discharge port; a cone wheel is fixedly arranged at the axis of the sealing plate, the cone wheel is meshed with the first transmission wheel for transmission, and the first transmission wheel is slidably connected to the rotating shaft of the first adjustment wheel.

[0012] Furthermore, a third rack is fixedly arranged on the second fixed plate, the third rack is spaced apart from the second rack, and the third rack has a different length from the second rack.

[0013] Furthermore, the adjustment ring includes two half-ring segments and two straight segments, the two half-ring segments and the two straight segments form a closed-loop structure, and the arc-shaped opening directions of the two half-ring segments are arranged opposite to each other.

[0014] The beneficial effects of the present invention are as follows: a valve for flow control of the present invention includes a housing, a driving rod, a blocking plate, a transmission device and an adjusting device. The feed port and the discharge port of the housing are connected to the pipeline respectively, and when the second section of the driving rod is rotated, the first section of the driving rod slides up and down inside the housing, and the lower end of the first section is connected to the blocking plate through the transmission device, so that when the first section of the driving rod slides up and down inside the housing, the blocking plate slides up and down synchronously, and the feed port and the discharge port opened on the housing are blocked or opened. When the blocking plate opens the feed port or the discharge port, the first adjusting component causes the blocking plate to rotate, changes the position where the blocking plate contacts the feed port or the discharge port, and reduces the friction of the blocking plate at the same position. At the same time, under the action of the second adjusting component, the distance between the lower end of the first section of the driving rod and the axis of the blocking plate changes, so that the distance that the blocking rod slides downward changes by the same amount of rotating the second section of the driving rod, thereby changing the contact position between the blocking plate and the feed port or the discharge port. The abutment position between the sealing plate and the feed port or the discharge port is adjusted by the first adjusting component and the second adjusting component, so that the sealing plate is evenly worn, thereby improving the sealing performance of the sealing plate to the feed port or the discharge port. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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.

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of a valve for flow control according to an embodiment of the present invention; Figure 2 for Figure 1 A top view of the Figure 3 for Figure 2 Sectional view in the AA direction; Figure 4 for Figure 3 A partial enlarged view of point D in the middle; Figure 5 It is a structural schematic diagram of a group of transmission devices, adjustment devices and blocking plates in an embodiment of the present invention; Figure 6 for Figure 5 A front view of Figure 7 A diagram showing the connection relationship between the adjusting ring, the second adjusting wheel, the second transmission wheel and the third transmission wheel in an embodiment of the present invention; Figure 8 It is a schematic structural diagram of a first slider and a first adjusting wheel in an embodiment of the present invention; Fig. 9 for Figure 8 A top view of the Fig.10 for Fig. 9 Cross-sectional view along the BB direction.

[0017] In the figure: 110, shell; 120, feed port; 130, discharge port; 140, drive rod; 141, first section; 142, second section; 150, rotating ring; 170, blocking plate; 210, first fixed plate; 211, first slideway; 212, first slider; 220, second fixed plate; 221, second slideway; 222, second slider; 310, first rack; 320, first adjusting wheel; 330, first transmission wheel; 340, cone wheel; 350, adjusting rod; 360, adjusting block; 370, adjusting groove; 410, adjusting ring; 420, second rack; 430, third rack; 440, second adjusting wheel; 450, second transmission wheel; 460, third transmission wheel; 470, second connecting rod; 510, piston ring; 520, first spring. DETAILED DESCRIPTION

[0018] 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.

[0019] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0020] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0021] An embodiment of a valve for flow control of the present invention is as follows Figures 1 to 10 As shown, it includes a housing 110, a driving rod 140, a blocking plate 170, a transmission device and an adjustment device. The housing 110 is hollow inside and has a feed port 120 and a discharge port 130, which are arranged obliquely inside the housing 110.

[0022] The driving rod 140 includes a first section 141 that can slide up and down inside the housing 110 and a second section 142 that rotates outside the housing 110. The first section 141 is transmission-connected to the second section 142 so that when the second section 142 rotates, the first section 141 slides up and down inside the housing 110. Specifically, the second section 142 is rotatably connected to the housing 110, the first section 141 is only slidably connected to the housing 110, and the second section 142 is threadedly connected to the first section 141. The upper end of the second section 142 is fixedly connected with a rotating ring 150 so that when the rotating ring 150 is pushed to rotate, the first section 141 slides up and down inside the housing 110.

[0023] The blocking plate 170 can be synchronously slid up and down inside the shell 110. The radius of the blocking plate 170 is greater than the radius of the feed port 120 or the discharge port 130. The blocking plate 170 is used to block or open the feed port 120 and the discharge port 130. The blocking plate 170 is tilted to further improve the sealing performance of the blocking plate 170 to the feed port 120 and the discharge port 130, and reduce the wear of the blocking plate 170 between the feed port 120 and the discharge port 130. Specifically, the blocking plate 170 is an elliptical structure, and the blocking plate 170 is made of rubber. When the blocking plate 170 blocks the feed port 120 or the discharge port 130, the position where the blocking plate 170 contacts the feed port 120 or the discharge port 130 is deformed to ensure the sealing performance of the blocking plate 170 to block the feed port 120 or the discharge port 130.

[0024] The transmission device is disposed between the first section 141 of the driving rod 140 and the blocking plate 170, so as to prompt the blocking plate 170 to open or block the feed port 120 or the discharge port 130 when the first section 141 of the driving rod 140 slides up and down in the housing 110. Specifically, the transmission device includes a first fixed plate 210 and a second fixed plate 220. The first fixed plate 210 is slidably disposed inside the housing 110. A vertical first slideway 211 is provided on the first fixed plate 210. A first slider 212 is slidably disposed on the first slideway 211. One end of the first slider 212 is transmission-connected to the blocking plate 170, so as to make the blocking plate 170 slide up and down synchronously when the first slider 212 slides along the first slideway 211. The second fixed plate 220 is fixedly arranged inside the shell 110 and is spaced apart from the first fixed plate 210. A second slide 221 is vertically arranged on the second fixed plate 220. A second slider 222 is arranged in the second slide 221. One end of the second slider 222 is fixedly connected to the lower end of the first section 141 of the driving rod 140, and the other end of the second slider 222 is transmission-connected to the first slider 212, so that when the first section 141 of the driving rod 140 slides in the shell 110, the blocking plate 170 slides up and down synchronously to block or open the feed port 120 or the discharge port 130.

[0025] The adjusting device includes a first adjusting component and a second adjusting component. The first adjusting component is used to cause the blocking plate 170 to rotate and change the contact position between the blocking plate 170 and the feed port 120 or the discharge port 130. Specifically, the first adjusting component includes a first rack 310, a first adjusting wheel 320 and a first transmission wheel 330. The first rack 310 is fixedly arranged on the first fixed plate 210, and the first rack 310 is spaced apart from the first slideway 211. The first adjusting wheel 320 is rotatably connected to the first slider 212, and the first adjusting wheel 320 has a first state of meshing with the first rack 310 and a second state of disengagement. The first adjusting wheel 320 is rotatably connected to the rotating shaft of the first adjusting wheel 320, and the adjusting rod 350 is slidably connected to the first slider 212, so that when the adjusting rod 350 slides on the first slider 212, the meshing state of the first adjusting wheel 320 and the first rack 310 changes. Furthermore, adjustment blocks 360 are fixedly provided at both ends of the first slide 211, and adjustment slots 370 are provided on the adjustment blocks 360. The adjustment slots 370 are tilted, and the tilt directions of the adjustment slots 370 at both ends of the first slide 211 are opposite, so that when the first slider 212 slides to the upper and lower ends of the first slide 211, the adjustment slots 370 prompt the adjustment rod 350 to slide left and right along the first slider 212, thereby changing the meshing state of the first adjustment wheel 320 and the first rack 310.

[0026] In this embodiment, a cone wheel 340 is fixedly provided at the axis of the blocking plate 170, and the cone wheel 340 is meshed with the first transmission wheel 330 for transmission. The first transmission wheel 330 is slidably connected to the rotating shaft of the first adjustment wheel 320, so that when the first adjustment wheel 320 rotates, the cone wheel 340 is driven to rotate through the first transmission wheel 330, so that the blocking plate 170 rotates. According to the adjustment of the taper of the cone wheel 340, the inclination angle of the blocking plate 170 is adjusted. Specifically, a connecting plate is rotatably provided at the end of the cone wheel 340, and one end of the first transmission wheel 330 is rotatably connected to the connecting plate, and the connecting plate is fixedly connected to the first slider 212. When the blocking plate 170 is rotated, the contact position of the blocking plate 170 with the feed port 120 or the discharge port 130 is changed.

[0027] In this embodiment, the second adjustment component is used to adjust the distance between the axis of the blocking plate 170 and the first section 141 of the driving rod 140, so that the amount of downward sliding of the blocking plate 170 changes when the first section 141 of the driving rod 140 rotates the same amount, and when the blocking plate 170 blocks the feed port 120 and the discharge port 130, the contact point between the blocking plate 170 and the feed port 120 or the discharge port 130 changes, and the contact surface of the blocking plate 170 is evenly worn, so as to always maintain the sealing between the blocking plate 170 and the feed port 120 or the discharge port 130. Specifically, the second adjustment component includes an adjustment ring 410, a second rack 420 and a second adjustment wheel 440. The first fixed plate 210 is slidably disposed inside the housing 110, so that when the blocking plate 170 opens or blocks the feed port 120 or the discharge port 130, the first fixed plate 210 slides left and right inside the housing 110. The second rack 420 is fixedly disposed on the second fixing plate 220 and is spaced apart from the second slideway 221. The second adjusting wheel 440 is rotatably connected to the second slider 222 and has a third state of meshing with the second rack 420 and a fourth state of disengaging.

[0028] One end of the side wall of the adjustment ring 410 is fixedly connected to the first slider 212, and the second transmission wheel 450 is fixedly connected to the rotating shaft of the second adjustment wheel 440. A third transmission wheel 460 is arranged between the second transmission wheel 450 and the inner side wall of the adjustment ring 410, so that when the second transmission wheel 450 rotates, the third transmission wheel 460 drives the adjustment ring 410 to slide up and down. The second slider 222 is hollow inside, and the rotating shaft of the second adjustment wheel 440 is slidably and rotatably arranged in the second slider 222, so that when the first fixed plate 210 slides left and right in the housing 110, the meshing state of the second adjustment wheel 440 and the second rack 420 is changed. Furthermore, a third slideway is circumferentially provided on the side wall of the adjusting ring 410, and a first connecting rod is rotatably connected to the axis of the third transmission wheel 460, and the other end of the first connecting rod can slide along the third slideway, and a second connecting rod 470 is rotatably connected between the rotating shaft of the second transmission wheel 450 and the rotating shaft of the third transmission wheel 460, so that when the second adjusting wheel 440 rotates, the second transmission wheel 450 rotates, and the third transmission wheel 460 is driven to rotate at the same time, and the third transmission wheel 460 rotates circumferentially along the adjusting ring 410. Further, the adjusting ring 410 includes two semi-ring segments and two straight segments, and the two semi-ring segments and the two straight segments form a closed loop structure, and the arc-shaped opening directions of the two semi-ring segments are arranged oppositely. Driven by the third transmission wheel 460, the adjusting ring 410 slides up and down, and at the same time drives the first slider 212 to slide up and down, thereby changing the distance between the lower end of the first segment 141 of the driving rod 140 and the first slider 212. A third rack 430 is fixedly disposed on the second fixed plate 220. The third rack 430 is spaced apart from the second rack 420, and the lengths of the third rack 430 and the second rack 420 are different, so that when the second adjusting wheel 440 is engaged with the third rack 430, the deflection angle of the second adjusting wheel 440 is different, thereby changing the distance between the lower end of the first section 141 of the driving rod 140 and the first slider 212.

[0029] In this embodiment, a reset assembly is disposed in the second slider 222, and the reset assembly includes a piston ring 510, a damping fluid, a first elastic member, and a second elastic member, and the damping fluid is disposed inside the second slider 222. The piston ring 510 is slidably disposed in the second slider 222, and the first elastic member is fixedly disposed between the piston ring 510 and the second slider 222. Specifically, the first elastic member is a first spring 520, and the second elastic member is fixedly disposed between the other end of the piston ring 510 and the second slider 222. The second elastic member is a second spring, and the first spring 520 and the second spring act together to place the piston ring 510 in the middle of the second slider 222, and both the first spring 520 and the second spring are in a compressed state. The rotating shaft of the second adjusting wheel 440 is rotatably connected to the piston ring 510, so that when the first fixing plate 210 slides left and right in the housing 110, the rotating shaft of the second adjusting wheel 440 pushes the piston ring 510 to slide slowly in the second slider 222, and at the same time, according to the size of the extrusion force of the inclined feed port 120 or the discharge port 130 on the blocking plate 170, the second adjusting wheel 440 and the second rack 420 or the third rack 430 are in the same straight line, but the second adjusting wheel 440 is not aligned with the second rack 420. Or the third rack 430 is engaged. When the blocking plate 170 slides upward, due to the damping fluid inside the second slider 222, the first spring 520 slowly resets, prompting the second adjustment wheel 440 to slowly slide to the left. At this time, the second adjustment wheel 440 is engaged with the second rack 420 or the third rack 430, causing the second adjustment wheel 440 to rotate. At this time, the first adjustment wheel 320 is engaged with the first rack 310. The length of the first rack 310 causes the first transmission wheel 330 to rotate half a circle, thereby causing the blocking ring to rotate half a circle. The direction of the blocking plate 170 with an elliptical structure is changed, so that the position where the feed port 120 or the discharge port 130 contacts the blocking plate 170 is deflected, and the positions where the blocking plate 170 blocks the feed port 120 or the discharge port 130 twice are completely different. At the same time, the distance between the first slider 212 and the lower end of the first section 141 of the driving rod 140 changes, so that the contact position between the sealing plate 170 and the feed port 120 or the discharge port 130 changes when the sealing plate 170 blocks the feed port 120 or the discharge port 130 next time.

[0030] In this embodiment, sealing plates 170 are provided at the feed port 120 and the discharge port 130, and the two sealing plates 170 are connected to the first adjusting component and the second adjusting component. Transmission devices are provided on the two sealing plates 170, and the second sliders 222 of the two transmission devices are connected to the lower end of the first section 141 of the driving rod 140, so that the two sealing plates 170 slide up and down synchronously, and the feed port 120 and the discharge port 130 are opened or blocked at the same time.

[0031] During operation, the feed port 120 and the discharge port 130 on the shell 110 are connected between the pipelines, and the rotating ring 150 is pushed to rotate, so that the second section 142 of the driving rod 140 rotates. Since the second section 142 of the driving rod 140 is threadedly connected to the first section 141, and the first section 141 is slidingly connected to the shell 110, the first section 141 of the driving rod 140 slides up and down in the shell 110, driving the two blocking plates 170 to block or open the feed port 120 and the discharge port 130 at the same time.

[0032] The feed port 120 and the discharge port 130 are both inclined, and the diameter of the elliptical structure blocking plate 170 is larger than the diameter of the feed port 120 and the discharge port 130. The blocking plate 170 is inclined and made of rubber, so that the blocking plate 170 is in sealing contact with the feed port 120 or the discharge port 130 to improve the sealing of the feed port 120 or the discharge port 130. A second fixed plate 220 is vertically arranged inside the housing 110, and a second slideway 221 is vertically arranged on the fixed plate. The second slider 222 is slidably arranged in the second slideway 221, and one side of the second slider 222 is fixedly connected to the lower end of the first section 141 of the driving rod 140. A first fixed plate 210 is arranged at one side of the second fixed plate 220, and the first fixed plate 210 is slidably arranged inside the housing 110. A vertical first slideway 211 is arranged on the first fixed plate 210, and a first slider 212 is slidably arranged in the first slideway 211, and one side of the first slider 212 is transmission-connected with the second slider 222, so that when the second slider 222 slides along the second slideway 221, the first slider 212 slides along the first slideway 211. A first transmission wheel 330 is rotatably arranged on the first slider 212, and a cone wheel 340 is fixedly arranged at the axis of the blocking plate 170, and the cone wheel 340 is always engaged with the first transmission wheel 330, so that when the first slider 212 slides in the first slideway 211, the blocking plate 170 slides up and down, and the feed port 120 or the discharge port 130 is gradually blocked or opened.

[0033] When the blocking plate 170 gradually slides downward, since both the feed port 120 and the discharge port 130 are tilted, when the blocking plate 170 blocks the feed port 120 or the discharge port 130, the feed port 120 or the discharge port 130 squeezes the blocking plate 170, causing the first fixed plate 210 to slide to the right. A first rack 310 is fixedly disposed on the first fixed plate 210. A first adjusting wheel 320 is rotatably disposed on the first slider 212, and the rotating shaft of the first adjusting wheel 320 is slidably connected to the first transmission wheel 330. The rotating shaft of the first adjusting wheel 320 is rotatably connected to the adjusting rod 350, and the adjusting rod 350 is slidably connected to the first slider 212. Adjustment blocks 360 are fixedly provided at both ends of the first slide 211, and adjustment slots 370 are provided on the adjustment blocks 360. The adjustment slots 370 are tilted, and the tilt directions of the adjustment slots 370 at the upper and lower ends are opposite. When the first slider 212 moves to the upper and lower ends of the first slide 211, the adjustment rod 350 is squeezed and slid by the adjustment slots 370, driving the first adjustment wheel 320 to slide left and right on the first slider 212, thereby changing the meshing state of the first adjustment wheel 320 and the first rack 310, so that when the first adjustment wheel 320 and the first rack 310 are meshed and transmitted, the first adjustment wheel 320 rotates half a circle, and is transmitted by the first transmission wheel 330 and the cone wheel 340, so that the blocking plate 170 rotates half a circle, deflecting the direction of the blocking plate 170, so that the position where the blocking plate 170 blocks the feed port 120 or the discharge port 130 next time has no overlapping part with the position where the feed port 120 or the discharge port 130 is initially blocked.

[0034] The second slider 222 is hollow inside, and contains damping fluid. The piston ring 510 is slidably disposed inside the first slider 212. A first spring 520 is fixedly disposed between one end of the piston ring 510 and the inside of the second slider 222, and a second spring is fixedly disposed between the other end of the piston ring 510 and the inner end of the second slider 222. Both the first spring 520 and the second spring are in a compressed state, and the piston ring 510 is located in the middle of the second slider 222. A second rack 420 and a third rack 430 are fixedly disposed on the second fixed plate 220, and the length of the second rack 420 is greater than the length of the third rack 430. The rotating shaft of the second adjusting wheel 440 is rotatably connected to the piston ring 510, and the second transmission wheel 450 is fixedly arranged at the other end of the rotating shaft of the second adjusting wheel 440. The side wall of the second transmission wheel 450 is meshed with the third transmission wheel 460, and the side wall of the third transmission wheel 460 is always meshed with the adjusting ring 410. The adjusting ring 410 includes two semi-ring segments and two straight segments, and the arc-shaped opening directions of the two semi-ring segments are arranged oppositely, so that the adjusting ring 410 is a closed-loop structure. The lower end of the side wall of the adjusting ring 410 is fixedly connected to the first slider 212 to When the fixing plate 210 slides to the right, the rotating shaft of the second adjusting wheel 440 pushes the piston ring 510 to slide inside the second slider 222, so that the first spring 520 is squeezed and deformed, and then the second adjusting wheel 440 and the second rack 420 or the third rack 430 are in the same straight line, so that when the second adjusting wheel 440 rotates, the second transmission wheel 450 and the third transmission wheel 460 rotate, causing the adjusting ring 410 to slide up and down, thereby changing the distance between the first slider 212 and the lower end of the first section 141 of the driving rod 140.

[0035] When the blocking plate 170 opens the feed port 120 or the discharge port 130 , the adjusting rod 350 , under the action of the adjusting slot 370 at the lower end of the first slideway 211 , makes the first adjusting wheel 320 and the first rack 310 be in the same straight line. The blocking plate 170 is no longer squeezed by the feed port 120 or the discharge port 130, and the force of the blocking plate 170 on the first fixed plate 210 to slide left and right gradually disappears. At this time, the first spring 520 in the second slider 222 gradually extends, but the second slider 222 has damping fluid inside, which makes the first spring 520 extend slowly, thereby making the first fixed plate 210 slide slowly to the left. As the rotating ring 150 is pushed in the reverse direction, the first section 141 of the driving rod 140 gradually moves upward, driving the second slider 222 to gradually slide upward along the second slideway 221. At this time, the second adjusting wheel 440 engages with the second rack 420 or the third rack 430 on the second fixed plate 220, causing the second adjusting wheel 440 to rotate, driving the adjusting ring 410 to move up and down, thereby changing the distance between the first slider 212 and the lower end of the first section 141 of the driving rod 140. At the same time, when the second slider 222 slides up and down, the first slider 212 slides upward synchronously along the first slide, and the first adjustment wheel 320 is meshed with the first rack 310, so that the first adjustment wheel 320 rotates half a circle, thereby rotating the blocking plate 170 half a circle. When the first slider 212 slides to the upper end of the first slideway 211, the adjustment rod 350 abuts against the adjustment groove 370, prompting the first adjustment wheel 320 to slide, and at the same time, the first adjustment wheel 320 and the first rack 310 slide to be not in the same straight line. At this time, the first spring 520 returns to its initial state, and the second adjusting wheel 440 and the second rack 420 or the third rack 430 are not in the same straight line, so that when the feed port 120 or the discharge port 130 is blocked again, the contact position of the sealing plate 170 with the feed port 120 or the discharge port 130 changes, and the sealing plate 170 is further evenly worn, thereby improving the sealing performance of the sealing plate 170 to the feed port 120 or the discharge port 130.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve for flow control, characterized in that: include: The shell body is hollow inside and has a feed inlet and a discharge outlet; A driving rod, the driving rod comprises a first section that can slide up and down inside the shell and a second section that rotates outside the shell, the first section being transmission-connected to the second section so that when the second section rotates, the first section slides up and down inside the shell; A blocking plate, which is slidably disposed inside the shell and is used to block or open the feed port and the discharge port at the same time; A transmission device, which is arranged between the first section of the driving rod and the blocking plate, so that when the first section of the driving rod slides up and down in the shell, the blocking plate is prompted to open or block the feed port or the discharge port; The adjusting device includes a first adjusting component and a second adjusting component. The first adjusting component is used to cause the sealing plate to rotate and change the contact position of the sealing plate with the feed port or the discharge port; the second adjusting component is used to adjust the distance between the axis of the sealing plate and the first section of the driving rod, so as to change the amount by which the sealing plate slides downward by the same amount when the first section of the driving rod is rotated, and when the sealing plate blocks the feed port and the discharge port, the contact point between the sealing plate and the feed port or the discharge port is changed, and the contact surface of the sealing plate is evenly ground to always maintain the sealing between the sealing plate and the feed port or the discharge port.

2. A valve for flow control according to claim 1, characterized in that: The transmission device includes a first fixed plate and a second fixed plate; the first fixed plate is fixedly arranged inside the shell, a vertical first slide is opened on the first fixed plate, a first slider is slidably arranged on the first slide, and one end of the first slider is fixedly connected to the blocking plate; the second fixed plate is fixedly arranged inside the shell, and is spaced apart from the first fixed plate, a second slide is vertically arranged on the second fixed plate, a second slider is arranged in the second slide, one end of the second slider is fixedly connected to the first section of the driving rod, and the other end of the second slider is transmission connected to the first slider, so that when the first section of the driving rod slides in the shell, the blocking plate can slide up and down synchronously.

3. A valve for flow control according to claim 2, characterized in that: The first adjusting component includes a first rack, a first adjusting wheel and a first transmission wheel; the first rack is fixedly arranged on the first fixed plate, and the first rack is spaced apart from the first slide; the first adjusting wheel is rotatably arranged on the first slider, and the first adjusting wheel has a first state of meshing with the first rack and a second state of disengaging from the first rack; an adjusting rod is rotatably connected to the rotating shaft of the first adjusting wheel, and the adjusting rod is slidably connected to the first slider; adjusting blocks are fixedly arranged at both ends of the first slide, so that when the first slider slides to the upper and lower ends of the first slide, the adjusting blocks cause the adjusting rod to slide along the first slider, thereby changing the meshing state of the first adjusting wheel and the first rack; one end of the first transmission wheel is fixedly connected to the axis center of the blocking plate, and the other end of the first transmission wheel can be slidably connected to the rotating shaft of the first adjusting wheel, so that when the first adjusting wheel rotates, the blocking plate rotates.

4. A valve for flow control according to claim 3, characterized in that: The second adjustment assembly includes an adjustment ring, a second rack and a second adjustment wheel; The first fixing plate is slidably arranged inside the shell body, so that when the blocking plate opens or blocks the feed port or the discharge port, the first fixing plate can slide left and right inside the shell body; The second rack is fixedly arranged on the second fixed plate, and the second rack is spaced apart from the second slideway; the second adjusting wheel is rotatably connected to the second slider, and the second adjusting wheel has a third state of meshing with the second rack and a fourth state of disengaging from the meshing; One end of the side wall of the adjusting ring is fixedly connected to the first slider, a second transmission wheel is fixedly connected to the rotating shaft of the second adjusting wheel, and a third transmission wheel is arranged between the second transmission wheel and the inner side wall of the adjusting ring, so that when the second transmission wheel rotates, the third transmission wheel drives the adjusting ring to slide up and down; The second slider is hollow inside, and the rotating shaft of the second adjusting wheel is slidably and rotatably arranged in the second slider, so that when the first fixing plate slides left and right in the housing, the meshing state of the second adjusting wheel and the second rack is changed.

5. A valve for flow control according to claim 4, characterized in that: A third slideway is circumferentially provided on the side wall of the adjustment ring, a first connecting rod is rotatably connected to the axis of the third transmission wheel, and the other end of the first connecting rod can slide along the third slideway; a second connecting rod is rotatably connected between the rotating shaft of the second transmission wheel and the rotating shaft of the third transmission wheel.

6. A valve for flow control according to claim 5, characterized in that: A reset assembly is arranged in the second slider, and the reset assembly includes a piston ring, a damping fluid and a first elastic member. The damping fluid is arranged inside the second slider; the piston ring is slidably arranged in the second slider, and the first elastic member is fixedly arranged between the piston ring and the second slider. The rotating shaft of the second adjusting wheel is rotatably connected to the piston ring, so that when the first fixed plate slides left and right in the shell, the rotating shaft of the second adjusting wheel pushes the piston ring to slide slowly in the second slider.

7. A valve for flow control according to claim 6, characterized in that: The reset assembly also includes a second elastic member, which is arranged between the other end of the piston ring and the second slider; the first elastic member is a first spring; the second elastic member is a second spring; the first spring and the second spring work together to make the piston ring in the middle of the second slider, and the first spring and the second spring are both in a compressed state.

8. A valve for flow control according to any one of claims 3 to 7, characterized in that: The cross-sections of the feed port and the discharge port are tilted, and the sealing plate is tilted to improve the sealing performance of the sealing plate to the feed port or the discharge port; a cone wheel is fixedly arranged at the axis of the sealing plate, the cone wheel meshes with the first transmission wheel for transmission, and the first transmission wheel is slidably connected to the rotating shaft of the first adjustment wheel.

9. A valve for flow control according to any one of claims 4 to 7, characterized in that: A third rack is fixedly arranged on the second fixed plate. The third rack is spaced apart from the second rack, and the lengths of the third rack and the second rack are different.

10. A valve for flow control according to claim 7, characterized in that: The adjustment ring comprises two half-ring segments and two straight segments. The two half-ring segments and the two straight segments form a closed-loop structure, and the arc-shaped opening directions of the two half-ring segments are arranged oppositely.

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