A flow control valve

Abstract

This invention discloses a flow control valve, comprising: at least one motor, a transmission module connected to the motor output, a first valve core having a first valve core shaft section, a second valve core having a second valve core shaft section, a first position sensor disposed at a first position on the first valve core shaft section, and a second position sensor disposed at a second position on the first valve core shaft section, wherein the second valve core shaft section is sleeved on the first valve core shaft section, and when the motor is working, the first position sensor and the second position sensor monitor the position of the operating first valve core and second valve core. Advantages of this invention: This invention uses dual position sensors, which can simultaneously detect the positions of the upper and lower valve cores; using dual motors, the upper and lower valve cores can be driven to rotate independently in real time, and the positions of the upper and lower valve cores can be detected simultaneously with the position sensors, eliminating the need to consider the initial installation position of the valve cores, optimizing the structure, facilitating installation, improving efficiency, making maintenance easier, and increasing utilization.

Description

Technical Field

[0001] This invention belongs to the field of fluid control technology, and specifically relates to a flow control valve. Background Technology

[0002] Existing flow control valves basically use single-position sensors. These sensors can only detect the rotation angle and position of the valve core, but cannot detect or confirm the initial position of the lower valve core, nor can they confirm whether the lower valve core is fully aligned with the seal during operation. This may lead to leakage problems in the inner and outer flow channels.

[0003] Furthermore, existing flow control valves generally use a single motor to control the rotation of the valve core. This motor provides rotational power to the upper valve core, which in turn drives the lower valve core to rotate via a stop, thus achieving the mode switching of the flow control valve. However, single-motor flow control valves can only detect the rotation angle and position of the upper valve core, and cannot directly detect the rotation angle of the lower valve core. They cannot confirm whether the sealing edge of the lower valve core is completely aligned with the seal during operation, and there is a significant free stroke during operation, which may lead to leakage problems in the inner and outer flow channels. Therefore, it is necessary to propose a new flow control valve. Summary of the Invention

[0004] The purpose of this invention is to provide a flow control valve that can detect the position of the valve core and control the rotation of the valve core, and to solve the sealing problem of the inner and outer flow channels of the product.

[0005] The technical solution of the present invention is: a flow control valve, comprising: at least one motor, a transmission module connected to the output of the motor, a first valve core having a first valve core shaft section, a second valve core having a second valve core shaft section and being driven and engaged with the transmission module and cooperating with the first valve core, a first position sensor provided at a first position on the valve core shaft section, and a second position sensor provided at a second position on the first valve core shaft section, wherein the second valve core shaft section is sleeved on the first valve core shaft section, and when the motor is working, the motor and the transmission module rotate and cooperate, driving the second valve core to rotate, while the first position sensor and the second position sensor monitor the position of the first valve core and the second valve core in operation.

[0006] Based on the above technical solution, the following supplementary technical solutions are further included:

[0007] Preferably, there is one motor, and the transmission module includes a second output gear that cooperates with the second valve core shaft section.

[0008] Preferably, the top end of the first valve core shaft section is provided with a magnetic block that engages with the first position sensor, and the second output gear is fitted with a magnetic ring that engages with the second position sensor.

[0009] Preferably, the first valve core has a stop groove, while the bottom of the second valve core has a boss that cooperates with the stop groove and drives the first valve core to rotate.

[0010] Preferably, there are at least two motors, and the output of each motor is coupled with the corresponding transmission module, and the transmission module includes a first transmission module and a second transmission module.

[0011] Preferably, the two motors are of the same specifications and are arranged longitudinally along the center line of the second valve core.

[0012] Preferably, the first transmission module includes a first output gear that mates with the first valve core shaft segment, and the second transmission module includes a second output gear that mates with the second valve core shaft segment, wherein the center lines of the first valve core shaft segment, the second valve core shaft segment, the first output gear, and the second output gear are all on the same axis.

[0013] Preferably, both the first output gear and the second output gear are fitted with a magnetic ring, and the first position sensor and the second position sensor are located outside the magnetic ring.

[0014] Preferably, the first valve core has a descending core cavity for weight reduction; while the lower end of the second valve core shaft section is provided with a seal mounting cavity and a bearing mounting cavity, and the upper part is provided with a second valve core shaft section, and the seal mounting cavity and the bearing mounting cavity are respectively installed with a seal and a bearing.

[0015] Advantages of this invention: This invention uses dual position sensors, which can simultaneously detect the positions of the upper and lower valve cores; it uses dual motors, which can independently drive the upper and lower valve cores to rotate in real time. Combined with the position sensors, the positions of the upper and lower valve cores can be detected simultaneously. There is no need to consider the initial installation position of the valve cores. This optimizes the structure, makes installation convenient, improves efficiency, facilitates maintenance, and increases utilization.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

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

[0018] Figure 1 This is an overall sectional view of the first embodiment of the present invention; Figure 2 This is a cross-sectional view of the first valve core and the second valve core in the first embodiment of the present invention; Figure 3 This is a cross-sectional view of the first valve core in the first embodiment of the present invention; Figure 4 This is a cross-sectional view of the second valve core in the first embodiment of the present invention; Figure 5 This is a cross-sectional view of the second output gear in the first embodiment of the present invention; Figure 6 This is an overall sectional view of the second embodiment of the present invention; Figure 7 This is a cross-sectional view of the first transmission module and the second transmission module in the second embodiment of the present invention; Figure 8 This is a cross-sectional view of the first transmission module, the second transmission module, and the motor in the second embodiment of the present invention from another perspective; Figure 9 This is a cross-sectional view of the first valve core and the second valve core in the second embodiment of the present invention; Figure 10 This is a cross-sectional view of the first valve core in the second embodiment of the present invention; Figure 11 This is a cross-sectional view of the second valve core in the second embodiment of the present invention. Detailed Implementation

[0019] Example 1: Refer to Figure 1-5 As shown, the present invention discloses a first embodiment of a flow control valve, which includes: at least one motor, a transmission module 200 connected to the output of the motor, a first valve core 300 having a first valve core shaft section 301, a second valve core 400 having a second valve core shaft section 408 and being driven and engaged with the transmission module 200 and cooperating with the first valve core 300, a first position sensor 304 provided at a first position on the first valve core shaft section 301, and a second position sensor 305 provided at a second position on the valve core shaft section 301, wherein the second valve core shaft section 408 is sleeved on the first valve core shaft section 301, and when the motor is working, the motor and the transmission module 200 rotate and engage, driving the second valve core 400 to rotate, while the first position sensor 304 and the second position sensor 305 monitor the position of the first valve core 300 and the second valve core 400 in operation.

[0020] The number of motors is one, and the transmission module 200 includes a second output gear 202 that cooperates with the second valve core 400, wherein the first valve core shaft section 301 passes through the second valve core shaft section 408, so the center lines of the second output gear 202, the first valve core shaft section 301, and the second valve core shaft section 408 are on the same axis.

[0021] The top end of the first valve core shaft section 301 is provided with a magnetic block 302 that engages with the first position sensor 304, while the second output gear 202 is fitted with a magnetic ring 303 that engages with the second position sensor 305. The first position sensor 304 and the second position sensor 305 are connected to the same circuit board, which is located above the first valve core shaft section 301. Similar to a single position sensor, the position of the valve core is determined by sensing the changes in the magnetic field of the magnetic ring 303 and the magnetic block 302, respectively, by the first position sensor 304 and the second position sensor 305, thus preventing internal and external leakage. The first valve core 300 has a stop groove 307, while the bottom of the second valve core 400 has a boss 405 that engages with the stop groove 307 and drives the first valve core 300 to rotate. The first valve core 300 and the second valve core 400 are connected by a bearing to reduce friction and increase coaxiality. The boss 405 between the two valve cores allows power to be transmitted through a transmission assembly, so that the transmission shaft only needs to be connected to one valve core to drive both valve cores to rotate.

[0022] Figure 2 In this design, the first valve core 300 has a descending core cavity 306 for weight reduction, and the valve core shaft section 301 passes through the descending core cavity 306. The lower end of the second valve core shaft section 408 is provided with a seal mounting cavity 402 and a bearing mounting cavity 403, and the top is provided with a second connecting spline 404. The seal mounting cavity 402 and the bearing mounting cavity 403 are respectively equipped with a seal 406 and a bearing 407. The first valve core 300 and the second valve core 400 are provided with flow channels for connecting at least two flow ports. The seal 406 is used to seal the contact surface between the valve core shaft section 301 and the second valve core 400, thereby improving the sealing performance of the valve body.

[0023] When the motor is operating, it rotates in conjunction with the transmission module 200. The transmission module 200 engages with the second connecting spline 404, driving the second valve core 400 to rotate. The second valve core 400 then drives the first valve core 300 to rotate, thus completing the switching of the flow path and adjusting the flow ratio. Furthermore, the first position sensor 304 and the second position sensor 305 monitor the operating first valve core 300 and second valve core 400 in real time to determine the angular positions of the two valve cores.

[0024] In addition, when the dual-valve core integrated port valve is working, at least two external flow ports are connected to the external fluid system, while the other flow ports are sealed. The fluid enters the external flow channel in the first valve core 300 from one external flow port, enters the second valve core 400 through the connecting hole, then flows out of the valve core from another connecting hole through the valve core flow channel in the second valve core 400, and finally flows out from the other external flow port through the external flow channel corresponding to the connecting hole.

[0025] The first valve core 300 and the second valve core 400 are symmetrically arranged. During valve operation, the flow channels within both valve cores are subjected to fluid pressure, but the pressure on the two valve cores is directed in opposite directions, thus reducing the overall force on the valve cores and solving the problem of unilateral pressure in disc valves. Because the first valve core 300 and the second valve core 400 are symmetrically arranged along a plane perpendicular to the valve body axis, when a flow channel in the first valve core 300 is closed, the flow channel at the supporting position in the second valve core 400 is also closed. This ensures that the hydraulic pressure on the upper and lower parts of the valve body is the same, maintaining overall force balance within the valve body.

[0026] Because the valve core is composed of two parts, a first valve core 300 and a second valve core 400, each valve core has several pre-set flow channels, and the valve body has several pre-set flow port. The number of flow port connected to external pipelines can be selected according to actual needs, while other flow port is sealed. Therefore, this valve has good compatibility. At the same time, because the valve core is composed of two parts, the number of flow channels that can be set within the valve core is greater, making it more practical and increasing the selectivity of flow channels, which facilitates the design of flow channel pathways.

[0027] Example 2: Refer to Figure 6-11 As shown, the present invention discloses a second embodiment of a flow control valve, which includes: at least one motor 1000, a transmission module 2000 connected to the output of the motor 1000, a first valve core 3000 having a first valve core shaft section 3010, a second valve core 4000 having a second valve core shaft section 4080 and being driven and engaged with the transmission module 2000 and cooperating with the first valve core 3000, a first position sensor 3040 provided at a first position on the first valve core shaft section 3010, and a second position sensor 3050 provided at a second position on the valve core shaft section 3010.

[0028] There are at least two motors 1000, and the output of each motor 1000 is coupled with the corresponding transmission module 2000. The transmission module 2000 includes a first transmission module 2010 and a second transmission module 2020. The two motors 1000 are of the same specifications and are arranged longitudinally along the center line of the second valve core 4000.

[0029] The first transmission module 2010 includes a first output gear 2011 that mates with the first valve core shaft section 3010, while the second transmission module 2020 includes a second output gear 2021 that mates with the second valve core shaft section 4080. The centerlines of the first valve core shaft section 3010, the second valve core shaft section 4080, the first output gear 2011, and the second output gear 2021 are all on the same axis, and the second valve core shaft section 4080 is sleeved on the first valve core shaft section 3010. Both the first output gear 2011 and the second output gear 2021 are fitted with a magnetic ring 3020, and the first position sensor 3040 and the second position sensor 3050 are located outside the magnetic ring 3020. The centerlines of the first position sensor 3040 and the second position sensor 3050 are on the same axis and connected to the same circuit board, which is positioned between the two output gears.

[0030] Figure 8 In this system, motor 1000 is connected to the transmission module. When motor 1000 operates, it drives two transmission modules, which in turn drive the first valve core 3000 and the second valve core 4000 to switch the flow channels and adjust the flow ratio. Furthermore, the first position sensor 3040 and the second position sensor 3050 monitor the operating first valve core 3000 and second valve core 4000 in real time to determine their angular positions.

[0031] Figure 9 In this design, the first valve core 3000 has a descending core cavity 3060 for weight reduction; the lower end of the second valve core shaft section 4080 is provided with a seal mounting cavity 4020 and a bearing mounting cavity 4030, and the upper part is provided with the second valve core shaft section 4080. The second valve core shaft section 4080 is hollow, so the first valve core shaft section 3010 passes through the second valve core shaft section 4080. The top of the second valve core shaft section 4080 is provided with a second connecting spline 4040, and the seal mounting cavity 4020 and the bearing mounting cavity 4030 are respectively equipped with a seal 4060 and a bearing 4070. The first valve core 3000 and the second valve core 4000 are provided with flow channels for connecting at least two flow ports. The seal 4060 is used to seal the contact surface between the valve core shaft section 3010 and the second valve core 4000, improving the sealing performance of the valve body.

[0032] The first valve core 3000 and the second valve core 4000 are symmetrically arranged. During valve operation, the flow channels within both valve cores are subjected to fluid pressure, but the pressure on the two valve cores is directed in opposite directions, reducing the overall force on the valve cores and solving the problem of unilateral pressure in disc valves. Because the first valve core 3000 and the second valve core 4000 are symmetrically arranged along a plane perpendicular to the valve body axis, when a flow channel in the first valve core 3000 is closed, the flow channel at the opposing support position in the second valve core 4000 is also closed. This ensures that the hydraulic pressure on the upper and lower parts of the valve body is the same, maintaining overall force balance within the valve body.

[0033] Because the valve core is composed of two parts, a first valve core 3000 and a second valve core 4000, each valve core has several pre-set flow channels, and the valve body has several pre-set flow port. The number of flow port connected to external pipelines can be selected according to actual needs, while other flow port is sealed. Therefore, this valve has good compatibility. Furthermore, because the valve core is composed of two parts, the number of flow channels that can be set within the valve core is greater, its practicality is wider, and the selectivity of the flow channels is increased, facilitating the design of the flow channel.

[0034] Advantages of this invention: This invention uses dual position sensors, which can simultaneously detect the positions of the upper and lower valve cores; it uses dual motors, which can independently drive the upper and lower valve cores to rotate in real time. Combined with the position sensors, the positions of the upper and lower valve cores can be detected simultaneously. There is no need to consider the initial installation position of the valve cores. This optimizes the structure, makes installation convenient, improves efficiency, facilitates maintenance, and increases utilization.

[0035] Of course, the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent transformations or modifications made according to the spirit and essence of the main technical solution of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A flow control valve, characterized in that, It includes: The first valve core (300, 3000) has a first valve core shaft section (301, 3010). The second valve core (400, 4000) has a second valve core shaft section (408, 4080). The second valve core (400, 4000) and the first valve core (300, 3000) are arranged along the axis of the valve body of the flow control valve. The first valve core shaft section (301, 3010) and the second valve core shaft section (408, 4080) extend to the same side in the axial direction of the valve body. The first valve core shaft section (301, 3010) passes through the second valve core shaft section (408, 4080). The first position sensor (304, 3040) and the second position sensor (305, 3050) are spaced apart and fixed relative to the valve body. The first position sensor (304, 3040) and the second position sensor (305, 3050) respectively monitor the position of the first valve core (300, 3000) and the second valve core (400, 4000) in operation.

2. The flow control valve according to claim 1, characterized in that, Also includes: Motor (1000); The transmission modules (200, 2000) are connected to the output of the motor (1000) and rotate in coordination with the motor (1000). The transmission modules (200, 2000) are at least in coordination with the second valve core (400, 4000). When the motor (1000) is working, it drives the second valve core (400, 4000) to rotate.

3. The flow control valve according to claim 2, characterized in that, The number of motors is one, and the transmission module (200) includes a second output gear (202) that cooperates with the second valve core shaft section (408). The center lines of the second output gear (202) and the second valve core shaft section (408) are on the same axis, and the first valve core (300) cooperates with the second valve core (400).

4. The flow control valve according to claim 3, characterized in that, The first valve core shaft segment (301) is provided with a magnetic block (302) that is inductively engaged with the first position sensor (304) on the axial end face away from the first valve core (300). The first position sensor (304) is located on the axial side of the first valve core shaft segment (301) away from the first valve core (300). The second output gear (202) is fitted with a magnetic ring (303) that engages with the second position sensor (305). The second position sensor (305) is located on the radial outside of the magnetic ring (303) and is arranged opposite to the magnetic ring (303) in the radial direction of the magnetic ring (303).

5. The flow control valve according to claim 3, characterized in that, The first valve core (300) has a stop groove (307) on the side facing the second valve core (400), and the second valve core (400) has a boss (405) on the side facing the first valve core (300) that cooperates with the stop groove (307) and drives the first valve core (300) to rotate.

6. The flow control valve according to claim 2, characterized in that, The number of motors (1000) is at least two, and the transmission module (2000) includes a first transmission module (2010) and a second transmission module (2020). The outputs of the two motors (1000) are respectively connected to the first transmission module (2010) and the second transmission module (2020). The first transmission module (2010) and the second transmission module (2020) are respectively connected to the first valve core shaft section (3010) and the second valve core shaft section (4080).

7. The flow control valve according to claim 6, characterized in that, The two motors (1000) are of the same specifications and are arranged along the center line of the second valve core (4000).

8. The flow control valve according to claim 6, characterized in that, The first transmission module (2010) includes a first output gear (2011) that cooperates with the first valve core shaft segment (3010), and the second transmission module (2020) includes a second output gear (2021) that cooperates with the second valve core shaft segment (4080), wherein the center lines of the first valve core shaft segment (3010), the second valve core shaft segment (4080), the first output gear (2011), and the second output gear (2021) are all on the same axis.

9. The flow control valve according to claim 8, characterized in that, A magnetic ring (3020) is fitted on the first output gear (2011), and the first position sensor (3040) is located on the radial outside of the magnetic ring (303) and is arranged opposite to the magnetic ring (303) in the radial direction of the magnetic ring (303); A magnetic ring (3020) is fitted on the second output gear (2021), and a second position sensor (3050) is located on the radial outside of the magnetic ring (3020) and is opposite to the magnetic ring (303) in the radial direction of the magnetic ring (303).

10. The flow control valve according to claim 1, characterized in that, The first valve core (300, 3000) has a descending core cavity (306, 3060) for weight reduction. The second valve core shaft segment (408, 4080) has a sealing element mounting cavity (402, 4020) and a bearing mounting cavity (403, 4030) at one end facing the first valve core (300, 3000). The sealing element mounting cavity (402, 4020) is located on the side of the bearing mounting cavity (403, 4030) away from the first valve core (300, 3000). The sealing element mounting cavity (402, 4020) and the bearing mounting cavity (403, 4030) are respectively equipped with a sealing element (406, 4060) and a bearing (407, 4070). The first valve core shaft segment (301, 3010) passes through the sealing element (406, 4060) and the bearing (407, 4070).

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