A flow control valve

Abstract

The application relates to the technical field of valves, in particular to a flow control valve which comprises a valve body, a plugging piece, a valve cover, a diaphragm and a clamping piece. A flow channel is formed in the valve body, the plugging piece blocks the flow channel in an initial state, the diaphragm is horizontally arranged between the valve body and the valve cover and can revolve around a first reference axis, and the clamping piece is installed between the valve body and the valve cover and can clamp the upper and lower ends of the diaphragm. When the clamping position of the clamping piece to the diaphragm needs to be adjusted, the diaphragm is driven to revolve around the first reference axis, the clamping and fixing position of the diaphragm is changed, and local damage or rupture is reduced; meanwhile, the revolving adjustment makes the eroded part of the diaphragm not be limited to the fixed phase, local damage caused by concentrated erosion is reduced, and the service life of the diaphragm is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a flow control valve. BACKGROUND

[0002] As a multifunctional valve for regulating the flow of pipeline fluid through high-precision pilot mode, the flow control valve has been widely used in water conservancy projects, industrial production and other fields due to its core advantages of automatic control and high regulation precision, and has become a key component to ensure the stable operation of fluid conveying systems. The working principle is as follows: when the input signal increases, the supply pressure is filled to the pilot chamber through the electromagnetic valve and acts on the diaphragm, driving the valve opening linked with the diaphragm, so that the supply pressure flows from the inlet to the outlet; the pressure difference generated by the outlet side orifice and the secondary side pressure is detected by the pressure sensor, and the detection signal is fed back to the control loop, and the flow is dynamically adjusted through the control loop to realize automatic and accurate control of fluid flow.

[0003] As the core executive element of the flow control valve, the structural stability and service life of the diaphragm directly determine the control accuracy and operation reliability of the valve. In order to ensure the installation stability of the diaphragm under the action of fluid pressure, the existing flow control valve generally uses two groups of electromagnetic clamping pieces to fix and limit the edges of the diaphragm. However, during the process of moving up and down of the diaphragm under pressure to open and close the valve, the clamped part of the diaphragm is prone to stress relaxation and permanent deformation of the material. With the extension of use time, such deformation will gradually intensify, causing local damage or even overall rupture of the diaphragm, directly causing valve leakage or control failure, and the diaphragm on both sides of the diaphragm is prone to local erosion of the diaphragm, and the eroded part is always more concentrated on the fixed phase, which is easy to cause serious damage to this part, further intensify the damage speed of the diaphragm, and shorten the service life of the diaphragm. SUMMARY

[0004] The present application provides a flow control valve to solve the problem that the clamped part of the diaphragm is prone to deformation during the process of moving up and down of the diaphragm under pressure to open and close the valve, and the impact part of the diaphragm also intensifies the damage speed of the diaphragm, shortening the service life of the diaphragm.

[0005] The flow control valve of the present application adopts the following technical scheme: a flow control valve, comprising a valve body, a blocking piece, a valve cover, a diaphragm and a clamping piece; the valve body is arranged in the vertical direction, a flow channel is formed in the valve body and penetrates in the first direction, and the first direction is the horizontal direction; the blocking piece is arranged in the valve body and can open or block the flow channel; in the initial state, the blocking piece blocks the flow channel and divides the flow channel into a pilot channel and a rear pilot channel arranged in the first direction in sequence; the valve cover is installed on the valve body; the diaphragm is horizontally arranged between the valve body and the valve cover and can revolve around the first reference axis; the first reference axis is the vertical axis and is eccentrically arranged with the vertical center axis of the diaphragm; the diaphragm defines an upper chamber and a lower chamber between the valve body and the valve cover; the upper chamber is communicated with the pilot channel; the lower chamber is communicated with the rear pilot channel; and when the fluid pressure inside the upper chamber is greater than the fluid pressure inside the lower chamber, the diaphragm can deform downward and drive the blocking piece to act, and the action of the blocking piece can open the flow channel; the clamping piece is installed between the valve body and the valve cover and can clamp the upper and lower ends of the diaphragm; the clamping piece has a locked state and an unlocked state; in the locked state, the clamping piece limits the diaphragm to slide in the horizontal direction; in the unlocked state, the clamping piece allows the diaphragm to slide in the horizontal direction; and in the initial state, the clamping piece is in the locked state.

[0006] Further, the blocking piece comprises a valve plate, a valve rod and a valve cylinder; the valve plate is arranged in the vertical direction in the valve body and located in the flow channel; the valve rod is arranged in the vertical direction in the valve body and can move up and down; the valve rod is eccentrically arranged with the diaphragm; the valve cylinder is located at the lower end of the valve rod and fixedly connected with the valve rod; and the valve cylinder is installed on the valve body through a first elastic piece; the first elastic piece is arranged in the vertical direction; and the first elastic piece is a spring; in the initial state, the valve cylinder abuts against the valve plate to block the flow channel; the pilot channel and the rear pilot channel are separated by the valve rod and the valve cylinder in the flow channel; and the diaphragm deforming downward can drive the valve rod to move downward; the valve rod moving downward can make the valve cylinder move downward and away from the valve plate, thereby opening the flow channel.

[0007] Further, the clamping piece comprises an upper clamping group and a lower clamping group; the upper clamping group is installed on the valve cover and located in the upper chamber; the lower clamping group is installed on the valve body and located in the lower chamber; the upper clamping group comprises an inner clamping ring and an outer clamping ring; the inner clamping ring and the outer clamping ring are coaxially arranged with the valve rod; the inner clamping ring is located inside the outer clamping ring; electromagnets are arranged on the inner clamping ring and the outer clamping ring; and the structure of the lower clamping group is the same as that of the upper clamping group.

[0008] Further, the inner clamping ring and the outer clamping ring of the upper clamping group are in sliding fit with the valve cover and can move up and down relative to the valve cover; and the inner clamping ring and the outer clamping ring of the lower clamping group are in sliding fit with the valve body and can move up and down relative to the valve body.

[0009] Further, the valve rod is fixedly connected with the inner clamping ring of the lower clamping group.

[0010] Further, the outer clamping rings of the upper clamping group and the outer clamping rings of the lower clamping group are provided with a plurality of outer clamping rings, which are sequentially arranged from the inside to the outside on the diaphragm, the valve cover is provided with a first limiting rod, the first limiting rod is arranged along the radial direction of the plurality of outer clamping rings of the upper clamping group and sequentially passes through the valve cover and the plurality of outer clamping rings of the upper clamping group; the valve body is provided with a second limiting rod, the second limiting rod is arranged along the radial direction of the plurality of outer clamping rings of the lower clamping group and sequentially passes through the valve body and the plurality of outer clamping rings of the lower clamping group.

[0011] Further, a first transmission member is arranged between the valve cover and the valve body, the first transmission member comprises a first motor, a first gear, a first ring gear and a driving column; the valve cover comprises a cover body and a cover plate, the cover plate is installed at the lower end of the cover body; the first motor is installed on the cover body, the first gear is fixedly installed on the output shaft of the first motor, and the output shaft of the first motor is arranged in the vertical direction, the first ring gear is rotatably installed on the cover plate and is in mesh with the first gear; the first ring gear is coaxial with the valve rod and is eccentrically arranged with the diaphragm, the first reference axis direction is the central axis direction of the first ring gear; the driving column is arranged in the vertical direction and is fixedly connected to the lower end of the first ring gear; the driving groove is arranged coaxially with the diaphragm, and the driving column is inserted into the driving groove.

[0012] Further, the first transmission member further comprises a second motor and an eccentric column; the second motor is installed on the cover body, one end of the eccentric column is installed on the output shaft of the second motor, and the other end is connected to the center of the diaphragm.

[0013] Further, a second transmission member is arranged between the valve cover and the valve body, the second transmission member comprises a matching gear, a matching ring gear, two second ring gears and two third ring gears; the matching gear is arranged on the diaphragm and is coaxial with the diaphragm, the two second ring gears are respectively fixedly connected to the inner clamping rings of the upper clamping group and the lower clamping group, and the matching gear is in mesh with the two second ring gears; the matching ring gear is arranged on the outer peripheral wall surface of the diaphragm, the two third ring gears are respectively arranged on the cover plate and the valve body, and the matching ring gear is in mesh with the two third ring gears.

[0014] Further, the diaphragm comprises a first disc body, a second disc body and a third disc body, the first disc body is circular, the second disc body and the third disc body are annular, the first disc body, the second disc body and the third disc body are nested with each other and fixedly connected as a whole, the first disc body and the third disc body are made of metal material, the second disc body is made of rubber material, the third gear and the matching gear are arranged on the first disc body, and the matching ring gear is arranged on the outer peripheral wall surface of the third disc body.

[0015] The beneficial effects of this invention are as follows: The flow control valve of this invention, through the cooperation of a valve body, a sealing element, a valve cover, a diaphragm, and a clamping element, allows fluid to be fed into the valve body from one side of the pilot channel during use. After entering the pilot channel, the fluid flows to the upper chamber, increasing the pressure inside the upper chamber, which becomes greater than that in the lower chamber. At this time, the diaphragm can deform downwards under the pressure difference, driving the sealing element to actuate, opening the flow channel, allowing the fluid to flow from the pilot channel to the rear pilot channel and out of the valve body. Furthermore, the fluid in the rear pilot channel also enters the lower chamber, changing the pressure difference between the upper and lower chambers. During use, the flow rate of the control valve can be adjusted by controlling the change in the pressure difference between the upper and lower chambers.

[0016] During this process, the clamping element is locked. When fluid enters the upper chamber and applies force to the diaphragm, the clamping element restricts the diaphragm from sliding horizontally. After a period of use, when it is necessary to adjust the clamping position of the diaphragm, the clamping element is switched to the unlocked state, and the diaphragm is driven to revolve around the first reference axis. This changes the fixed clamping position and working phase of the diaphragm, effectively alleviating stress relaxation and material deformation at the clamping point, and reducing local damage or breakage. At the same time, the revolve adjustment means that the eroded part of the diaphragm is no longer limited to the fixed phase, which can reduce local damage caused by concentrated erosion, extend the service life of the diaphragm, and the operation is simple, requiring no valve disassembly to complete the adjustment of the diaphragm's stress area. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the embodiments or the prior art will be described below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the flow control valve of the present invention;

[0019] Figure 2 This is a partial sectional view of the overall structure of an embodiment of the flow control valve of the present invention;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0022] Figure 5 for Figure 2 Enlarged view of point C in the middle;

[0023] Figure 6 This is an exploded view of the overall structure of an embodiment of the flow control valve of the present invention;

[0024] Figure 7 Fig. 2 is a sectional view of a part of mechanism of an embodiment of the flow control valve of the present application; Figure 6 Fig. 3 is an enlarged view of a part D in Fig. 2;

[0025] Figure 8 Fig. 4 is an enlarged view of a part E in Fig. 2; Figure 6

[0026] Figure 9 Fig. 5 is an enlarged view of a part F in Fig. 2; Figure 6

[0027] Figure 10 Fig. 6 is an enlarged view of a part G in Fig. 2; Figure 6

[0028] Figure 11 Fig. 7 is a sectional view of a part of mechanism of an embodiment of the flow control valve of the present application;

[0029] Figure 12 Fig. 8 is an enlarged view of a part H in Fig. 7; Figure 11

[0030] Figure 13 Fig. 9 is a bottom view of a part of structure of the flow control valve of the present application. Figure 11

[0031] Fig. 100, valve body; 110, flow passage; 111, pilot passage; 112, back pilot passage; 120, second limit rod; 200, blocking member; 210, valve plate; 220, valve rod; 230, valve cylinder; 240, first elastic member; 300, valve cover; 301, cover body; 302, cover plate; 310, control valve seat; 320, first limit rod; 400, diaphragm; 401, driving groove; 500, clamping member; 510, inner clamping ring; 520, outer clamping ring; 600, first transmission member; 610, first motor; 620, first gear; 630, first gear ring; 640, driving column; 650, second motor; 660, eccentric column; 710, matching gear; 720, matching gear ring; 730, second gear ring; 740, third gear ring. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0033] An embodiment of the flow control valve of the present application is shown in Fig. 1. Figures 1 to 13 Fig. 2 is a sectional view of a part of mechanism of an embodiment of the flow control valve of the present application;

[0034] ​​​​​A flow control valve comprises a valve body 100, a blocking piece 200, a valve cover 300, a diaphragm 400 and a clamping piece 500. The valve body 100 is arranged in a vertical direction, and a flow channel 110 is formed in the valve body 100 and extends in a first direction. The first direction is a horizontal direction. The blocking piece 200 is arranged in the valve body 100 and can open or block the flow channel 110. In an initial state, the blocking piece 200 blocks the flow channel 110 and divides the flow channel 110 into a pilot passage 111 and a rear pilot passage 112 arranged in the first direction. The valve cover 300 is installed on the valve body 100. The diaphragm 400 is horizontally arranged between the valve body 100 and the valve cover 300 and can revolve around a first reference axis. The first reference axis is a vertical axis and is arranged eccentrically to a vertical center axis of the diaphragm 400. The diaphragm 400 defines an upper chamber and a lower chamber between the valve body 100 and the valve cover 300. The upper chamber is in communication with the pilot passage 111, the lower chamber is in communication with the rear pilot passage 112, and when the fluid pressure inside the upper chamber is greater than the fluid pressure inside the lower chamber, the diaphragm 400 can deform downward and drive the blocking piece 200 to act, and the blocking piece 200 can open the flow channel 110.

[0035] The clamping piece 500 is installed between the valve body 100 and the valve cover 300 and can clamp the upper and lower ends of the diaphragm 400. The clamping piece 500 has a locked state and an unlocked state. In the locked state, the clamping piece 500 limits the diaphragm 400 to slide in the horizontal direction. In the unlocked state, the clamping piece 500 allows the diaphragm 400 to slide in the horizontal direction. In the initial state, the clamping piece 500 is in the locked state.

[0036] Specifically, the pilot passage 111 and the upper chamber are in communication through a first passage. A first electromagnetic valve is arranged in the first passage. A control valve seat 310 is arranged on the valve cover 300. A control element is arranged in the control valve seat 310. The control element can control the first electromagnetic valve to be turned on or off.

[0037] In use, fluid is sent into the valve body 100 from the side of the pilot passage 111. After entering the pilot passage 111, the fluid flows to the upper chamber, so that the pressure inside the upper chamber increases and is greater than that of the lower chamber. At this time, the diaphragm 400 can deform downward under the action of the pressure difference and drive the blocking piece 200 to act, so that the flow channel 110 is opened, and the fluid can flow from the pilot passage 111 to the rear pilot passage 112 and be sent out of the valve body 100. The fluid in the rear pilot passage 112 also enters the lower chamber, changing the pressure difference between the upper chamber and the lower chamber. In use, the pressure difference between the upper chamber and the lower chamber can be controlled to adjust the flow of the control valve.

[0038] And in this process, the clamping piece 500 is in a locked state, when the fluid enters the inside of the upper chamber and exerts force on the diaphragm 400, the clamping piece 500 limits the diaphragm 400 to slide in the horizontal direction. After being used for a period of time, when it is necessary to adjust the clamping position of the clamping piece 500 on the diaphragm 400, the clamping piece 500 is switched to an unlocked state, and the diaphragm 400 is driven to revolve around the first reference axis, so as to change the clamping fixed position and working phase of the diaphragm 400, effectively relieve the stress relaxation and material deformation of the clamping part of the diaphragm 400, and reduce local damage or rupture; at the same time, the revolution adjustment makes the eroded part of the diaphragm 400 no longer limited to the fixed phase, so as to reduce the local damage caused by concentrated erosion, prolong the service life of the diaphragm 400, and the operation is simple and the adjustment of the stress area of the diaphragm 400 can be completed without disassembling the valve.

[0039] In a further embodiment, the sealing piece 200 comprises a valve plate 210, a valve rod 220 and a valve cylinder 230, the valve plate 210 is arranged in the vertical direction in the valve body 100 and located in the flow channel 110, the valve rod 220 is arranged in the vertical direction in the valve body 100 and can move up and down, the valve rod 220 is arranged eccentrically with the diaphragm 400, and the central axis direction of the valve rod 220 is the first reference axis direction, that is, the diaphragm 400 can revolve around the central axis of the valve rod 220.

[0040] The valve cylinder 230 is located at the lower end of the valve rod 220 and is fixedly connected with the valve rod 220, and the valve cylinder 230 is installed on the valve body 100 through the first elastic piece 240, the first elastic piece 240 is arranged in the vertical direction, and the first elastic piece 240 is a spring. In the initial state, the valve cylinder 230 abuts against the valve plate 210 to block the flow channel 110, and the pilot passage 111 and the rear pilot passage 112 are separated by the valve rod 220 and the valve cylinder 230 in the flow channel 110; and the diaphragm 400 deforms downward to drive the valve rod 220 to move downward, and the valve rod 220 moves downward to make the valve cylinder 230 move downward and away from the valve plate 210, thereby opening the flow channel 110.

[0041] In the embodiment, the valve plate 210, the valve rod 220 and the valve cylinder 230 are arranged, the valve plate 210 and the valve cylinder 230 abut against each other in the initial state to block the flow channel 110, and the flow channel 110 is separated into the pilot passage 111 and the rear pilot passage 112, so that when the fluid enters the flow channel 110, the fluid is separated by the valve plate 210 and the valve cylinder 230, and the fluid enters the upper chamber from the pilot passage 111 and exerts pressure on the diaphragm 400, so that the diaphragm 400 deforms downward, and the diaphragm 400 deforms downward to drive the valve rod 220 to move downward, and the valve rod 220 moves downward to make the valve cylinder 230 move downward and away from the valve plate 210, thereby opening the flow channel 110.

[0042] In a further embodiment, the clamping assembly 500 comprises an upper clamping set and a lower clamping set, the upper clamping set is mounted on the bonnet 300 and located in the upper chamber, the lower clamping set is mounted on the valve body 100 and located in the lower chamber, the upper clamping set comprises an inner clamping ring 510 and an outer clamping ring 520, both of which are coaxially arranged with the valve stem 220, and the inner clamping ring 510 is located inside the outer clamping ring 520, and both of them are provided with electromagnets, which are controlled by the control element. The structure of the lower clamping set is the same as that of the upper clamping set.

[0043] In this embodiment, the upper and lower ends of the diaphragm 400 are clamped by the cooperation of the upper and lower clamping sets. Specifically, in use, the control element energizes the electromagnets, which in turn causes the inner clamping ring 510 of the upper clamping set and the inner clamping ring 510 of the lower clamping set to attract each other, and at the same time, the outer clamping ring 520 of the upper clamping set and the outer clamping ring 520 of the lower clamping set attract each other, thereby clamping the diaphragm 400. The clamping assembly is in a locked state, limiting the sliding of the diaphragm 400 in the horizontal direction. When it is necessary to make the diaphragm 400 slide in the horizontal direction, the control element reduces the voltage, thereby reducing the current passing through the electromagnets, reducing the magnetic force, and in turn reducing the clamping force on the diaphragm 400, allowing the diaphragm 400 to slide in the horizontal direction. The clamping assembly is in an unlocked state.

[0044] In this embodiment, the inner clamping ring 510 and the outer clamping ring 520 of the upper clamping set are in sliding fit with the bonnet 300 and can move up and down relative to the bonnet 300. The inner clamping ring 510 and the outer clamping ring 520 of the lower clamping set are in sliding fit with the valve body 100 and can move up and down relative to the valve body 100.

[0045] Further, the valve stem 220 is fixedly connected to the inner clamping ring 510 of the lower clamping set. When the diaphragm 400 deforms downward, the diaphragm 400 drives the valve stem 220 downward through the inner clamping ring 510 of the lower clamping set, causing the valve cylinder 230 to move downward and away from the valve plate 210, thereby opening the flow passage 110.

[0046] Further, the outer clamping ring 520 of the upper clamping set and the outer clamping ring 520 of the lower clamping set are provided with a plurality of outer clamping rings 520, which are arranged in sequence from the inside to the outside of the diaphragm 400. The bonnet 300 is provided with a first limiting rod 320, which is arranged along the radial direction of the plurality of outer clamping rings 520 of the upper clamping set and sequentially passes through the bonnet 300 and the plurality of outer clamping rings 520 of the upper clamping set. The valve body 100 is provided with a second limiting rod 120, which is arranged along the radial direction of the plurality of outer clamping rings 520 of the lower clamping set and sequentially passes through the valve body 100 and the plurality of outer clamping rings 520 of the lower clamping set.

[0047] When the diaphragm 400 is deformed under pressure, the inner clamping ring 510 and the outer clamping ring 520 of the upper clamping group and the inner clamping ring 510 and the outer clamping ring 520 of the lower clamping group can be driven to move synchronously, thereby reducing the stress on the diaphragm 400. Taking the plurality of outer clamping rings 520 of the upper clamping group as an example, in use, the first limiting rod 320 can be manually pulled to move, so that the first limiting rod 320 releases the limitation on one or more outer clamping rings 520 and allows the outer clamping rings 520 to move synchronously with the diaphragm 400; of course, electromagnetic driving members can also be arranged on the first limiting rod 320 and the second limiting rod 120, and the first limiting rod 320 and the second limiting rod 120 can be automatically moved by using a control element. In debugging, an operator can adjust the number of diaphragms 400 clamped by the outer clamping rings 520 by changing the initial clamping position according to the actual pipeline characteristics and load conditions, and fine-tune the sensitivity of the entire flow control valve. Specifically, in the starting stage, the number of outer clamping rings 520 through which the first limiting rod 320 and the second limiting rod 120 pass can be increased, and the number of outer clamping rings 520 that can move up and down can be reduced, so as to temporarily reduce the sensitivity to reduce the starting impact. In the stable running stage, the number of outer clamping rings 520 through which the first limiting rod 320 and the second limiting rod 120 pass can be reduced, and the number of outer clamping rings 520 that can move up and down can be increased, so as to increase the sensitivity to pursue accuracy. Such flexible control helps to prolong the service life of the valve itself and downstream equipment.

[0048] In a further embodiment, a first transmission member 600 is arranged between the valve cover 300 and the valve body 100, and the first transmission member 600 is used to drive the diaphragm 400 to revolve around a first reference axis.

[0049] The first transmission member 600 includes a first motor 610, a first gear 620, a first gear ring 630, and a driving column 640. The valve cover 300 includes a cover body 301 and a cover plate 302, and the cover plate 302 is installed at the lower end of the cover body 301. The first motor 610 is installed on the cover body 301, the first gear 620 is fixedly installed on the output shaft of the first motor 610, and the output shaft of the first motor 610 is arranged in the vertical direction. The first gear ring 630 is rotatably installed on the cover plate 302 and is in mesh with the first gear 620. The first gear ring 630 is coaxial with the valve rod 220 and is eccentrically arranged with the diaphragm 400, and the direction of the first reference axis is the central axis direction of the first gear ring 630. The driving column 640 is arranged in the vertical direction and is fixedly connected to the lower end of the first gear ring 630. The diaphragm 400 is provided with a driving groove 401, and the driving groove 401 is coaxially arranged with the diaphragm 400. The driving column 640 is inserted into the driving groove 401.

[0050] The first transmission member 600 is provided in the embodiment. When the diaphragm 400 needs to slide relative to the clamping member 500 in the horizontal direction, the first motor 610 is started. The first motor 610 drives the first gear 620 to rotate, and the first gear 620 drives the first gear ring 630 to rotate. The rotation of the first gear ring 630 drives the driving column 640 to rotate synchronously and slide along the driving groove 401. Since the first gear ring 630 is eccentrically arranged relative to the diaphragm 400, the driving column 640 drives the diaphragm 400 to move with the driving column 640, so that the diaphragm 400 revolves around the central axis of the first gear ring 630, and the clamping and fixing position of the diaphragm 400 is changed.

[0051] Alternatively, in another possible embodiment, the first transmission member 600 further includes a second motor 650 and an eccentric column 660. The second motor 650 is mounted on the cover 301, and the eccentric column 660 is connected at one end to the output shaft of the second motor 650 and at the other end to the center of the diaphragm 400.

[0052] In normal use, only the first motor 610, the first gear 620, the first gear ring 630 and the driving column 640 are needed to cooperate with the diaphragm 400 to realize the rotation of the diaphragm 400 around the first reference axis. In the embodiment, the second motor 650 and the eccentric column 660 are provided to cooperate with each other. In use, the first motor 610 and the second motor 650 can be started synchronously. Specifically, the first motor 610 and the second motor 650 can be connected to the same driver for driving, and the angular velocities of the first motor 610 and the second motor 650 are equal. Thus, when the first motor 610 drives the outer side of the diaphragm 400 to revolve around the first reference axis through the first gear 620, the first gear ring 630 and the driving column 640, the second motor 650 can drive the inner side of the diaphragm 400 to revolve around the first reference axis synchronously through the eccentric column 660, thereby improving the stability of the diaphragm 400 during revolution.

[0053] In another possible embodiment, a second transmission member 700 is further arranged between the valve cover 300 and the valve body 100. The second transmission member 700 is used to drive the diaphragm 400 to rotate.

[0054] The second transmission member 700 includes a matching gear 710, a matching gear ring 720, two second gear rings 730 and two third gear rings 740. The matching gear 710 is arranged on the diaphragm 400 and coaxial with the diaphragm 400. The two second gear rings 730 are respectively fixed to the inner clamping ring 510 of the upper clamping group and the inner clamping ring 510 of the lower clamping group. The matching gear 710 is engaged with the two second gear rings 730. The matching gear ring 720 is arranged on the outer peripheral wall surface of the diaphragm 400. The two third gear rings 740 are respectively arranged on the cover plate 302 and the valve body 100. The matching gear ring 720 is engaged with the two third gear rings 740.

[0055] The diaphragm 400 comprises a first piece, a second piece and a third piece, the first piece is circular, the second piece and the third piece are annular, the first piece, the second piece and the third piece are nested and fixed together, the first piece and the third piece are metal materials, which can be stainless steel or hard plastic such as polytetrafluoroethylene. The second piece is a rubber material, which can be nitrile rubber or fluororubber. The matching gear 710 is arranged on the first piece, and the matching gear ring 720 is arranged on the outer peripheral wall surface of the third piece.

[0056] By arranging the first piece, the second piece and the third piece, the second piece is used as the main deformation area, and the first piece and the third piece are used as the main mounting area.

[0057] In the embodiment, the second transmission member 700 is arranged, when the diaphragm 400 revolves around the first reference axis, the matching gear 710 can engage with the second gear ring 730, and the matching gear ring 720 can engage with the third gear ring 740, so that the diaphragm 400 rotates while revolving, further improves the position change range of the diaphragm 400, and further reduces the negative influence of stress concentration and local erosion on the diaphragm 400.

[0058] In combination with the above embodiment, the specific working process is as follows:

[0059] In use, the fluid is sent into the valve body 100 from the pilot passage 111 side, and after entering the pilot passage 111, the fluid flows to the upper chamber, so that the internal pressure of the upper chamber increases and is greater than that of the lower chamber. At this time, the diaphragm 400 can deform downward under the action of the pressure difference and drive the sealing member 200 to act, so that the flow passage 110 is opened, and the fluid can flow from the pilot passage 111 to the rear passage 112 and be sent out of the valve body 100. And the fluid in the rear passage 112 will also enter the lower chamber, changing the pressure difference between the upper chamber and the lower chamber. In use, the pressure difference between the upper chamber and the lower chamber can be controlled to adjust the flow of the control valve.

[0060] And in this process, the clamping member 500 is in a locked state, when the fluid enters the upper chamber and exerts force on the diaphragm 400, the clamping member 500 limits the sliding of the diaphragm 400 in the horizontal direction. After being used for a period of time, when it is necessary to adjust the clamping position of the diaphragm 400 by the clamping member 500, the clamping member 500 is switched to an unlocked state, and the diaphragm 400 is driven to revolve around the first reference axis, so as to change the clamping and fixing position of the diaphragm 400 and the working phase, effectively relieve the stress relaxation and material deformation of the clamping part of the diaphragm 400, and reduce local damage or rupture; At the same time, the revolving adjustment makes the eroded part of the diaphragm 400 no longer limited to the fixed phase, which can reduce the local damage caused by concentrated erosion and prolong the service life of the diaphragm 400, and the operation is simple and convenient without disassembling the valve to complete the adjustment of the stress area of the diaphragm 400.

[0061] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flow control valve, characterized in that: The system includes a valve body, a plugging component, a valve cover, a diaphragm, and a clamping component. The valve body is vertically oriented and has a flow channel extending along a first direction, which is horizontal. The plugging component is located within the valve body and can open or close the flow channel. Initially, the plugging component closes the flow channel and divides it into a pilot channel and a follower channel arranged sequentially along the first direction. The valve cover is mounted on the valve body. The diaphragm is horizontally positioned between the valve body and the valve cover and can revolve around a first reference axis, which is a vertical axis and eccentrically positioned relative to the vertical center axis of the diaphragm. The diaphragm is positioned between the valve body and the valve cover. The upper chamber and lower chamber are defined. The upper chamber is connected to the pilot channel, and the lower chamber is connected to the rear pilot channel. When the fluid pressure inside the upper chamber is greater than the fluid pressure inside the lower chamber, the diaphragm can deform downward and drive the sealing element to move, which can open the flow channel. The clamping element is installed between the valve body and the valve cover and can clamp the upper and lower ends of the diaphragm. The clamping element has a locked state and an unlocked state. When it is locked, the clamping element restricts the diaphragm from sliding in the horizontal direction. When it is unlocked, the clamping element allows the diaphragm to slide in the horizontal direction. Initially, the clamping element is in the locked state.

2. The flow control valve according to claim 1, characterized in that: The sealing component includes a valve plate, a valve stem, and a valve cylinder. The valve plate is vertically positioned within the valve body and located in the flow channel. The valve stem is vertically positioned within the valve body and can move up and down. The valve stem is eccentrically positioned with respect to the diaphragm. The valve cylinder is located at the lower end of the valve stem and is fixedly connected to the valve stem. The valve cylinder is mounted on the valve body via a first elastic element, which is vertically positioned and is a spring. In the initial state, the valve cylinder abuts against the valve plate, blocking the flow channel. The pilot channel and the follower channel are separated by the valve stem and the valve cylinder within the flow channel. Furthermore, the downward deformation of the diaphragm can drive the valve stem to move downward. The downward movement of the valve stem can cause the valve cylinder to move downward and away from the valve plate, thereby opening the flow channel.

3. A flow control valve according to claim 2, characterized in that: The clamping components include an upper clamping assembly and a lower clamping assembly. The upper clamping assembly is mounted on the valve cover and located in the upper chamber, while the lower clamping assembly is mounted on the valve body and located in the lower chamber. The upper clamping assembly includes an inner clamping ring and an outer clamping ring, both of which are coaxially arranged with the valve stem, with the inner clamping ring located inside the outer clamping ring. Electromagnets are provided on both the inner and outer clamping rings. The structure of the lower clamping assembly is the same as that of the upper clamping assembly.

4. A flow control valve according to claim 3, characterized in that: The inner and outer clamping rings of the upper clamping assembly are slidably engaged with the valve cover and can move up and down relative to the valve cover; the inner and outer clamping rings of the lower clamping assembly are slidably engaged with the valve body and can move up and down relative to the valve body.

5. A flow control valve according to claim 4, characterized in that: The valve stem is fixedly connected to the inner clamping ring of the lower clamping assembly.

6. A flow control valve according to claim 4, characterized in that: Multiple outer clamping rings are provided in both the upper clamping group and the lower clamping group. These multiple outer clamping rings are arranged sequentially from the inside to the outside on the diaphragm. A first limiting rod is provided on the valve cover. The first limiting rod is arranged along the radial direction of the multiple outer clamping rings of the upper clamping group and passes through the valve cover and the multiple outer clamping rings of the upper clamping group in sequence. A second limiting rod is provided on the valve body. The second limiting rod is arranged along the radial direction of the multiple outer clamping rings of the lower clamping group and passes through the valve body and the multiple outer clamping rings of the lower clamping group in sequence.

7. A flow control valve according to claim 4, characterized in that: A first transmission component is provided between the valve cover and the valve body. The first transmission component includes a first motor, a first gear, a first gear ring, and a drive column. The valve cover includes a cover body and a cover plate, with the cover plate installed at the lower end of the cover body. The first motor is installed on the cover body, and the first gear is fixedly installed on the output shaft of the first motor, with the output shaft of the first motor arranged vertically. The first gear ring is rotatably installed on the cover plate and meshes with the first gear. The first gear ring is coaxial with the valve stem and eccentrically positioned with respect to the diaphragm. The direction of the first reference axis is the direction of the central axis of the first gear ring. The drive column is arranged vertically and fixedly connected to the lower end of the first gear ring. A drive groove is provided on the diaphragm, and the drive groove is coaxially positioned with the diaphragm. The drive column is inserted into the drive groove.

8. A flow control valve according to claim 7, characterized in that: The first transmission component also includes a second motor and an eccentric column; the second motor is mounted on the cover, one end of the eccentric column is mounted on the output shaft of the second motor, and the other end is connected to the center of the diaphragm.

9. A flow control valve according to claim 8, characterized in that: A second transmission component is also provided between the valve cover and the valve body. The second transmission component includes a mating gear, a mating gear ring, two second gear rings, and two third gear rings. The mating gear is set on the diaphragm and is coaxial with the diaphragm. The two second gear rings are respectively fixed to the inner clamping rings of the upper clamping group and the lower clamping group. The mating gear meshes with the two second gear rings at the same time. The mating gear ring is set on the outer peripheral wall of the diaphragm. The two third gear rings are respectively set on the cover plate and the valve body. The mating gear ring meshes with the two third gear rings at the same time.

10. A flow control valve according to claim 9, characterized in that: The diaphragm includes a first sheet, a second sheet, and a third sheet. The first sheet is circular, while the second and third sheets are annular. The first, second, and third sheets are nested together and fixed as a whole. The first and third sheets are made of metal, while the second sheet is made of rubber. The third gear and the mating gear are both located on the first sheet, and the mating gear ring is located on the outer peripheral wall of the third sheet.

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