[0026] In the process of specific use of the flow regulating valve of the present invention, the blades arranged in the valve body are driven by a stepping motor to swing as required and can stay at any position, thereby controlling the fluid flowing in from the inlet pipe to flow from the first to a certain flow ratio. An outlet pipe and a second outlet pipe flow out.
[0027] The specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0028] figure 1 Is a perspective view of the first embodiment of the flow control valve of the present invention, figure 2 Is the front view of the first embodiment of the present invention, image 3 Yes figure 2 A-A sectional view of the first embodiment shown, Figure 4 Yes figure 2 The B-B sectional view of the first embodiment of the flow regulating valve shown, Figure 5 Is a sectional view of the blade of the first embodiment of the present invention, Image 6 It is a partial schematic diagram of the internal structure of the electric actuator of the first embodiment of the present invention. As shown in the figure, the flow regulating valve includes a valve body assembly 1 and an electric actuator 2. The valve body assembly 1 includes a valve body 8, an inlet pipe 3, a first outlet pipe 4 and a second outlet pipe 5. The electric actuator 2 includes a housing 20, a stepping motor 21 and a transmission device 22. The stepping motor 21 and the transmission device 22 are fixedly installed in the containing cavity of the housing 20. The electric actuator 2 is screwed and fixed on the outer wall of the valve body 8 of the valve body assembly 1 through the housing 20 to assemble the flow regulating valve according to the first embodiment of the invention.
[0029] Such as figure 2 with image 3 As shown, the valve body 8 on the valve body assembly 1 is provided with a blade 10, and the blade 10 is connected to the electric actuator 2 through a rotating shaft 11 that extends into the valve body 8 and is fixed on the blade 10. The electric actuator 2 is driven by the received pulse signal and drives the rotating shaft 11 to rotate. The rotating shaft 11 drives the blade 10 to swing a certain angle in the valve body 8 to a desired position and stay.
[0030] Specifically, the valve body assembly 1 includes a valve body 8, a first outlet pipe 4 fixedly connected to a first end cover 6 by welding, a second outlet pipe 5 fixedly connected to a second end cover 7 by welding, and The inlet pipe 3 is fixed on the valve body 8. The outer wall of the valve body 8 connected with the inlet pipe 3 is provided with an inlet for fixing the inlet pipe 3, and the inlet pipe 3 is fixed on the inlet by welding. The valve body 8 is also provided with a through hole 12 for fluid to flow out. The two ports of the through hole 12 are respectively connected with the first outlet pipe 4 and the second outlet pipe 5, and enter the valve body 8 from the inlet pipe 3. The fluid passes through the through hole 12 and then flows out of the valve body 8 through the first outlet pipe 4 and/or the second outlet pipe 5.
[0031] The valve body 8 is also provided with a shaft hole 13 for the rotation shaft 11 to pass through, and a notch 14 for positioning the rotation shaft 11 is opened on the through hole 12 at a position corresponding to the shaft hole 13. One end is connected with the electric actuator 2, and the other end passes through the shaft hole to extend into the through hole 12 in the valve body 8, and is positioned and supported by the recess 14.
[0032] The shaft hole 13 is a stepped hole. The stepped hole is provided with a sealing ring installation position for installing a sealing ring with a diameter larger than the diameter near the inner wall of the through hole 12, and a sealing ring 17 is installed in the sealing ring installation position. 17. Press the rotating shaft 11 and the inner wall of the sealing ring installation position, which can prevent fluid from leaking through the shaft hole and improve the sealing performance of the valve body.
[0033] The first outlet pipe 4 and the second outlet pipe 5 are screwed and fixed to the two end openings of the through hole 12 on the valve body through the first end cover 6 and the second end cover 7 respectively. Specifically, the first outlet pipe 4 and the second outlet pipe 5 are respectively fixed to the first end cover 6 and the second end cover 7 by welding, and the two end covers are fixedly installed on the valve by installing screws at the four corners. On the body 8, the first outlet pipe 4 and the second outlet pipe 5 respectively communicate with two ends of the through hole 12. In this way, the fluid can flow from the through hole 12 to the outlet pipe.
[0034] It should be pointed out here that the fixing method of the inlet pipe 3 on the inlet is not limited to welding, and it can also be connected by other methods such as screw connection. Correspondingly, the first outlet pipe 4 is used as the outlet pipe. The way that the second outlet pipe and the second outlet pipe 5 are respectively fixed to the first end cover 6 and the second end cover 7 is not unique. It can also be fixed in other ways such as screw connection, or the outlet pipe and the end cover are integrated. Forming structure. The fixing method of the end cover and the valve body is not limited to screw connection, and other methods such as welding can also be used. Under the premise of achieving the same technical effect, the fixing method adopted in this embodiment has simple installation, convenient processing and low cost. In addition, the end cover and the valve body are connected by screw connection, which is convenient for flexible replacement of parts in the valve body. During assembly, the parts in the through holes on the valve body can be assembled first, and then the end cover can be fixedly installed. Not only the parts are easy to process, but also It is beneficial to the installation and fixation of the sleeve 9 in the through hole.
[0035] Such as image 3 As shown, a sleeve 9 is embedded in the inner wall of the through hole 12. The sleeve 9 is provided with an opening 91 for fluid to flow in. The sleeve 9 is also provided with a rotating shaft 11 at the radial position of the sleeve. The opening 91 corresponds to the inlet during installation, the radial through hole 92 corresponds to the shaft hole 13, and the radial through hole 92 is in clearance fit with the rotating shaft 11 so that the rotating shaft 11 can The electric actuator 2 can rotate freely in the radial through hole 92.
[0036] Specifically, the sleeve 9 is made of rubber, the hollow part is a fluid channel, and the two ends of the sleeve 9 are provided with a certain thickness of annular extensions 15. The specific thickness depends on the size of the valve body and the working environment. The outer diameter of the annular extension portion 15 is greater than the outer diameter of the part between the two annular extension portions of the sleeve 9. Accordingly, the two ports of the through hole 12 of the valve body 8 are provided with the annular extension on the sleeve 9 The annular recess 16 of the portion 15, that is, the two ports of the through hole 12 are respectively provided with stepped holes, and the annular recess 16 is matched with the annular extension 15 on the sleeve 9.
[0037] The thickness of the annular extension 15 is slightly greater than the depth of the annular recess, that is, the length of the sleeve 9 is slightly greater than the length of the through hole 12, and the thickness of the annular extension 15 can be 0.05-0.15 mm larger than the depth of the annular recess 16. The inner diameter is slightly larger than the outer diameter of the annular extension 15; during installation, the two annular extensions are pressed and contact with both sides of the annular recess to seal. When the first end cover 6 and the second end cover 7 are fixed on the valve body 8 Above, the compression sleeve 9 is located at the outer part of the through hole 12. This part can function as a sealing ring and seal the first end cover 6 and the second end cover 7, which can prevent fluid leakage and omit Two sealing rings.
[0038] It should be pointed out here that the sleeve 9 is not limited to rubber materials. As long as the material of the sleeve 9 can meet the requirements of the flow control valve of the present invention, it can be used to make the sleeve 9, such as polytetrafluoroethylene. The length of the sleeve 9 can also be equal to the length of the through hole 12, and the sleeve 9 is not necessarily provided with an annular extension portion 15. The sleeve 9 can be directly straight, and the corresponding through hole 12 does not need to be provided with a stepped hole. This embodiment adopts such a form. The rubber material is mainly used to fit the sleeve into the through hole more conveniently, and the sleeve is longer than the through hole and is provided with an annular extension. When the end cover is fixed in the through hole by screw connection When the valve body 8 is installed, the sealing performance between the end cover and the valve body 8 is better, and the installation of a sealing ring is omitted, which can directly prevent fluid leakage. In addition, the casing is not limited to plastic materials. It can also be made of relatively soft metal materials. The structure is roughly cylindrical, such as red copper, aluminum alloy, etc., and the casing is crimped by the end caps on both sides. Fix and seal.
[0039] The vane 10 for diversion and drainage is installed in the sleeve 9 on the valve body 8. The middle part of the vane 10 is provided with a groove 24 for positioning and fixing the rotating shaft 11, and the groove 24 can be formed by stamping.
[0040] When installed, the blade surface with the groove 24 is located on the side facing away from the inlet. After the blade 10 is installed in the valve body, the rotating shaft 11 passes through the shaft hole 13 on the valve body and the radial through hole on the sleeve 9 and is positioned by the notch 14 on the valve body. After installation, the blade 10 passes through the laser Welding methods such as welding are fixed on the rotating shaft 11, and during welding, the welding pen extends into the valve body through the unconnected outlet side for welding. In this way, the welding position of the rotating shaft 11 and the blade 10 is located on the surface of the blade 10 facing away from the inlet.
[0041] When in use, the blade 10 swings with the rotation of the rotating shaft 11. Specifically, the blade 10 rotates with the rotating shaft 11 and the first abutment portion 18 in the sleeve 9 that guides the fluid to the first outlet pipe 4 and the The fluid is guided to swing between the second abutting portions 19 of the second outlet pipe 5. When the blade 10 is located at the first abutting portion 18 or the second abutting portion 19, the blade 10 and the sleeve 9 are pressed against each other.
[0042] It should be pointed out here that the fixing method of the blade 10 and the rotating shaft 11 is not unique. The blade 10 and the rotating shaft 11 may also be fixed by bonding, or a through hole through which the rotating shaft 11 is provided on the blade 10. The welding method is used here, mainly considering the relatively simple processing technology and reliable connection. The welding part of the blade 10 and the rotating shaft 11 can also be located on the plane of the blade 10 facing the inlet side, where the welding part of the blade 10 and the rotating shaft 11 is located on the plane of the blade 10 facing away from the inlet side, which can prevent the impact of the fluid on the welding part Damage the welding part, and make the fluid flow unobstructed and smooth, reducing fluid resistance and pressure drop.
[0043] The shape of the blade 10 is the same as the cross-sectional shape on the sleeve 9 when the blade 10 is located at the first abutting portion 18 or the second abutting portion 19, because when the blade is located at the first abutting portion 18 and the second abutting portion 19, The abutting part of the blade on the inlet side abuts on the two sides of the casing on the inlet side, so the shape of the blade 10 is elliptical. The length of the short axis of the blade 10 is equal to the inner diameter of the sleeve 9, and the length of the major axis of the blade 10 is from the first abutment portion 18 to the second abutment portion 19 by the maximum rotation angle θ of the blade 10 and the inlet on both sides of the through hole 12 Determined by the distance to the end of the inlet. The specific calculation method is as follows:
[0044] Assuming that the length of the through hole is L, the radius of the inlet is r, the inner diameter of the through hole is R, the maximum rotation angle of the blade is θ, and the length of the major axis of the blade And
[0045] Such as Figure 5 As shown, the blade 10 is located in the central part with a punched groove 24. When installed, the center of the groove 24 coincides with the center of the rotating shaft. In this way, after the blade is fixed to the rotating shaft, the blade rotates with the rotating shaft. The rotation can improve the flexibility of the blade rotation and the sealing performance of the blade. When the blade is located at the abutting position, the sleeve can be well sealed to isolate the two spaces, so that the fluid flows to one outlet pipeline. The end of the blade 10 is provided with an annular abutment portion 25 whose thickness gradually decreases from the outer ring to the middle. The thickness of the annular abutment portion is smaller than the thickness of the blade. The annular abutment portion can be obtained by chamfering or other processing methods.
[0046] In order to ensure the sealing performance of the blade 10 at the abutting position, a rubber layer 23 with a certain thickness is also bonded on the annular abutting portion of the blade 10. The blade 10 can be bonded with rubber by the following methods: first spray an adhesive on the annular abutment part of the blade 10, and then form a layer of rubber on the annular abutment part 25 by cross-linking and bond it to the surface of the annular abutment part , The rubber material used here can be selected according to the product use environment and temperature such as HNBR, EPDM, FKM and other rubber materials, and the adhesive can be Chemlock and other adhesives.
[0047] In operation, when the blade 10 is located at the first abutment portion 18 or the second abutment portion 19, the annular abutment portion is pressed against the sleeve 9, and the rubber layer 23 and the sleeve 9 on the abutment portion are under the action of force. Compressing against each other, the blade seals and isolates the casing into two parts. In this way, in the extreme position, the blade 10 can isolate one outlet pipeline to guide the fluid to another outlet pipeline, ensuring the sealing performance of the flow regulating valve of the present invention as a reversing valve.
[0048] By nesting the tube 9 in the through hole 12 of the valve body 8, rubber is glued to the blade, and the blade 10 is pressed against the sleeve 9 when the blade 10 is in contact, which can effectively prevent the blade 10 from scratching the through hole 12 The inner wall and the surface of the blade 10 are worn and other problems, and the sealing performance of the end cover and the valve body 8, the blade 10 and the sleeve 9 is increased to prevent internal and external leakage of the flow control valve, and increase the life of the flow control valve.
[0049] If the sleeve 9 is made of rubber material, even if the blade 10 is not provided with a rubber layer, as long as the annular abutment portion 25 is smooth, the blade 10 and the sleeve 9 can also be in the first abutment portion 18 or the second abutment portion 18 or second. The abutment of the connecting portion 19 enables the blade 10 to isolate one outlet pipeline to direct the fluid to another outlet pipeline.
[0050] It should be pointed out here that the sleeve 9 here is not limited to a cylindrical shape, but can also have other shapes, and the shape of the through hole in the sleeve 9 can also be different, and the shape of the blade 10 needs to be changed accordingly.
[0051] Such as image 3 , Image 6 As shown, the electric actuator 2 is fixedly installed on the outer wall of the valve body 8. Specifically, the electric actuator 2 is fixed on the outer wall of the valve body 8 where the shaft hole 13 is located by screws; in addition, the fixing method of the electric actuator and the valve body assembly is not limited to this, and crimping, clamping, and screwing can also be used. Wait. The electric actuator 2 includes a housing 20, a stepping motor 21 and a transmission device 22. The housing 20 is provided with a housing cavity for accommodating the transmission device 22 and the stepping motor 21, and the stepping motor 21 and the transmission device 22 are installed in the housing cavity of the housing 20. A through hole for the output end of the transmission device 22 or the rotating shaft 11 to pass through is provided on the bottom surface of the housing 20 at a position corresponding to the shaft hole 13 on the valve body 8. During installation, one end of the rotating shaft 11 is installed in cooperation with the output end of the transmission device 22. Specifically, the end of the end of the rotating shaft 11 located outside the valve body 8 is provided with a connecting part, and correspondingly, the output end of the transmission device 22 is provided There is a matching part that matches the connecting part on the rotating shaft 11. After the rotating shaft 11 is connected to the output end of the transmission device 22, the transmission device 22 drives the rotation shaft 11 to rotate.
[0052] The transmission device 22 is a gear reduction device, consisting of four gears and a worm. The worm is connected with the output shaft of the stepping motor 21. The helical teeth on the worm mesh with the teeth of the gear, and the gear and the gear Meshing is carried out to transfer the speed. Among them, there is a large gear at the lowest stage and the output end of the gear set. The number of teeth of the gear and worm is determined by the specific requirements of the product, and finally reaches the speed of the blade and the speed of the stepper motor. Achieve an appropriate ratio. During operation, the stepping motor 21 is driven by the pulse signal to rotate to drive the worm to rotate, and the worm drives the gear set to rotate. During the transmission of speed, the output speed of the stepping motor is decelerated by the transmission gear reducer and then output the required speed to drive the rotation. The shaft rotates, and the rotating shaft drives the blades to rotate. Finally, the output speed of the stepping motor is reduced by the transmission device at a set transmission ratio, and the blades are rotated at a certain angle at a set speed. In addition, the gear reduction device is not limited to being composed of four gears and a worm, and the number of gears can be adjusted as needed, such as from 2 to 5 or more.
[0053] In this way, the output speed of the stepping motor is reduced by the gear reduction device to make the blades rotate at an appropriate speed, which can make the rotation of the blades more stable, make the fluid disturbance caused by the rotation of the blades small, and prevent the blades from colliding with the sleeve. If the connection speed is too high, the impact casing damages the blade and casing, and the noise is low. Moreover, when the blade stays at a certain position between the first abutting part and the second abutting part to divert the fluid, the existence of the gear reduction device can prevent the blade from swinging under the action of the fluid to cause fluid distribution errors. The blade can stay in the required position all the time, which improves the accuracy of fluid distribution.
[0054] It should be pointed out here that the transmission device here is not limited to a gear reduction device, but may also be a worm gear and other transmission devices that achieve the required transmission ratio.
[0055] The installation method of the flow regulating valve of this embodiment is described below.
[0056] First, insert the sleeve 9 into the through hole of the valve body 8 and adjust the position of the sleeve 9 so that the radial through hole 12 and the opening correspond to the inlet and the shaft hole in the through hole respectively. Then install the blade 10 into the sleeve 9. When installing the blade 10, the blade surface with the positioning groove 24 on the blade 10 is installed in the sleeve 9 facing away from the inlet on the valve body 8. The position of the blade surface is adjusted, and the rotating shaft 11 is inserted into the valve body 8 through the sealing ring 17 installed on the shaft hole 13 and positioned by the notch 14. At this time, the rotating shaft 11 is located on the groove 24 of the blade 10, and the blade 10 is fixed to the rotating shaft 11 by laser welding on.
[0057] Next, weld the inlet pipe 3 to the inlet of the valve body 8, and then fix the first end cover 6 and the second end cover 7 with the first outlet pipe 4 and the second outlet pipe 5 fixed by welding with screws On the valve body 8, the installation of the valve body assembly 1 is completed.
[0058] Finally, the assembled electric actuator 2 is installed on the valve body assembly 1 and fixed by screws to assemble the flow regulating valve.
[0059] Assembling the flow regulating valve of the present invention in this way not only facilitates the processing of parts and components, but also facilitates the installation of the valve body assembly 1 and the installation and fixation of the sleeve 9.
[0060] When the flow control valve of the present invention is in use, the electric actuator 2 as an actuator receives an action signal to rotate, and the rotating shaft 11 is driven to rotate through the transmission device 22, and the rotation of the rotating shaft 11 drives the blade 10 to rotate to a desired position.
[0061] Such as Figure 4 As shown, when the fluid needs to be completely directed from the inlet pipe 3 to the first outlet pipe 4, the stepper motor 21 receives the action signal and starts to rotate, and the speed of the stepper motor 21 is reduced to a suitable speed through the reduction gear set. The rotating shaft 11 rotates, and the rotating shaft 11 drives the blade 10 to rotate to the first abutting portion 18. At this time, the blade 10 is pressed against the sleeve 9 and the blade 10 seals and isolates the inside of the sleeve 9 into two unconnected cavities At this time, the second outlet pipe 5 is cut off, and the inlet pipe 3 and the first outlet pipe 4 are connected. At this time, the stepping motor 21 stops rotating until the next rotation signal is received.
[0062] When it is necessary to guide the fluid from the inlet pipe 3 to the second outlet pipe 5, the stepper motor 21 receives the action signal and starts to rotate. The speed of the stepper motor 21 is reduced to a suitable speed through the reduction gear set to drive the rotating shaft 11 When rotating, the rotating shaft 11 drives the blade 10 to rotate to the second abutting portion 19. At this time, the blade 10 abuts and presses the rubber sleeve 9, and the blade 10 seals and isolates the sleeve 9 into two non-communicating chambers. At this time, the first outlet pipe 4 is cut off, and the inlet pipe 3 and the second outlet pipe 5 are connected. At this time, the stepping motor 21 stops rotating until the next rotation signal is received.
[0063] When both the first outlet pipe 4 and the second outlet pipe 5 need to communicate with the inlet pipe 3, and the fluid flow through the first outlet pipe 4 and the second outlet pipe 5 needs to be controlled and adjusted, the blade 10 is in the first A certain position between the abutting portion 18 and the second abutting portion 19, and the position of the blade is maintained by the transmission device.
[0064] Because the blade 10 of the present invention is driven by a stepping motor 21, the stepping motor 21 is an open-loop control element that converts an electrical pulse signal into an angular displacement or a linear displacement. The working principle of the stepping motor 21 is as follows: when the stepping motor 21 receives a pulse signal, it drives the stepping motor 21 to rotate a fixed angle in the set direction, which is called "step foot", and its rotation is It runs step by step at a fixed angle, so the angular displacement can be controlled by controlling the number of pulses, so as to achieve the purpose of accurate positioning. Therefore, the blade 10 driven by the stepping motor 21 can rotate between the first abutting portion 18 and the second abutting portion 19 and stay at any position within this range. When the blade 10 is at a certain position between the first abutting portion 18 and the second abutting portion 19, the inlet pipe 3 is in communication with the first outlet pipe 4 and the second outlet pipe 5. By adjusting the position of the blade 10, the fluid flowing out of the inlet pipe 3 can be divided according to a certain ratio, so that the medium flow into the first outlet pipe 4 and the second outlet pipe 5 reaches the required flow ratio, thereby Realizes the control of the media distribution and flow ratio. Specifically, the flow distribution ratio of the two outlet pipes can be obtained by testing first, and solidified in the corresponding control program.
[0065] The rotation of the blade 10 is controlled by the stepping motor 21, so that the blade 10 stays at any position between the first abutting portion 18 and the second abutting portion 19 (including the first abutting portion 18 and the second abutting portion 19) , It can realize the separation and control of the medium, not only the structure is simple, but also the functions of the stop valve and the flow control valve are integrated, which reduces the cost and saves the use space.
[0066] Of course, the present invention is not limited to only using the stepper motor 21, it can also be a servo motor and other other control elements that can realize the blade 10 stays at any position within a certain range. The transmission device 22 is not limited to a gear set. It can be in the form of a worm gear, and the mode of action is the same as above, so I won't repeat it here.
[0067] Figure 7 It is a front view of the second embodiment of the flow control valve of the present invention. The difference between this embodiment and the first embodiment is that this embodiment does not have a transmission device 22, and the stepping motor 21 directly drives the rotating shaft 11 to rotate. Accordingly, the rotating shaft 11 is installed in cooperation with the output end of the stepping motor 21. The form of cooperating installation is the same as the first embodiment.
[0068] When the flow rate of the fluid is not very large, that is, when the force exerted by the fluid on the blade is not large, when the stepper motor is powered off, the internal rotor and the magnetic pole are attracted. When the momentum is not large, the blade can be fixed to prevent the blade Oscillation and displacement are produced under the action of fluid.
[0069] During operation, the stepping motor 21 rotates under the control of the pulse signal to drive the rotating shaft 11 to rotate, and the rotating shaft 11 drives the blade 10 to swing to a desired position. The specific control method is the same as the first embodiment.
[0070] It should be pointed out here that the drive motor used in the present invention is not limited to the stepper motor 21, but can also be a servo motor and other control elements that can realize the blade 10 stays at any position within a certain range. The function is the same as the above. No longer.
[0071] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and not to limit the technical solutions described in the present invention. The embodiments of the present invention may also be other. For example, the valve body of the flow control valve of the present invention may not The inner tube is nested, but the blade is directly put into the through hole; the blade may not be glued with rubber. Therefore, although this specification has described the present invention in detail with reference to the above-mentioned embodiments, those of ordinary skill in the art should understand that the inventor of the present patent can still modify or equivalently replace the present invention; and everything does not depart from the present invention. The spirit and scope of the technical solutions and their improvements shall be covered by the scope of the claims of the present invention.
