Constant current device

Abstract

The utility model provides a constant flow device which comprises a shell, an adjusting seat, a piston and an elastic piece. The shell is provided with a first wall and a second wall which define a mounting cavity, a fluid inlet is formed in the first wall, and a fluid outlet is formed in the second wall. The adjusting seat and the first wall are oppositely arranged at an interval. The piston is installed in the installation cavity, the piston penetrates in the axial direction to form a fluid channel, the fluid channel communicates with the fluid inlet and the fluid outlet, and the piston can move between the first wall and the adjusting base to adjust the fluid flow of the fluid outlet. The elastic piece is connected between the adjusting base and the piston and used for providing elastic force for the piston to move towards the first wall. Wherein the adjusting seat is detachably connected with the shell; and / or the adjusting seat comprises a body part and an adjusting rod used for being connected with the elastic piece, and the distance between the adjusting rod and the first wall is adjustable. The constant flow device provided by the scheme can flexibly adapt to changes of different flow requirements while keeping high-precision flow control.

Description

Technical Field

[0001] This utility model relates to the field of fluid control technology, and more specifically to a constant flow device. Background Technology

[0002] A constant flow device is used to precisely regulate the flow rate of fluids and can be used in beverage machines. In existing constant flow devices, the piston stroke is preset, resulting in poor adaptability and an inability to optimize adjustments based on different usage requirements or fluid types.

[0003] Therefore, there is a need to provide a constant current device to at least partially solve the above problems. Utility Model Content

[0004] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, the first aspect of this utility model provides a constant current device, comprising:

[0006] The housing has a first wall and a second wall, the second wall being connected to the first wall and enclosing the first wall to form an installation cavity, the first wall having a fluid inlet and the second wall having a fluid outlet;

[0007] An adjustment seat, at least a portion of which is installed into the mounting cavity, wherein the adjustment seat is opposite to and spaced apart from the first wall;

[0008] A piston is installed in the mounting cavity, and the piston extends axially to form a fluid channel. The fluid channel is connected to the fluid inlet and the fluid outlet respectively. The piston can move between the first wall and the adjusting seat to adjust the fluid flow rate at the fluid outlet.

[0009] An elastic element, one end of which is connected to the adjusting seat and the other end of which is connected to the piston, is used to provide an elastic force to the piston to move toward the first wall;

[0010] The adjusting seat is detachably connected to the housing; and / or

[0011] The adjusting seat includes a body and an adjusting rod for connecting to the elastic element, the distance between the adjusting rod and the first wall being adjustable.

[0012] The constant flow device of this invention, through the cooperation of the adjusting seat and the elastic element, combined with the axial movement of the piston, can achieve precise flow regulation and stable output flow. The structure of a detachable adjusting seat and an adjustable adjusting rod allows the device to maintain high-precision flow control while flexibly adapting to changes in different flow requirements. The detachable or adjustable adjusting seat allows users to replace components or make flexible adjustments according to actual needs, improving the adaptability and maintenance convenience of the device.

[0013] Optionally, the constant current device further includes an end cap, which is detachably mounted to the housing, and the adjustment seat is mounted to the housing via the end cap.

[0014] Optionally, the constant current device satisfies at least one of the following conditions:

[0015] (1) The adjusting rod and the adjusting seat are connected by a thread;

[0016] (2) The end of the adjusting rod away from the elastic element is exposed outside the body portion;

[0017] (3) A boss is provided at the end of the adjusting rod near the elastic element;

[0018] (4) A first sealing ring is provided at the end of the adjusting rod near the elastic member, and the first sealing ring is sealed between the body and the adjusting rod;

[0019] (5) A second sealing ring is provided between the adjusting seat and the housing, and the second sealing ring is sealed to the adjusting seat and the housing respectively;

[0020] (6) The outer periphery of the shell is provided with reinforcing ribs extending in the circumferential direction.

[0021] Optionally, the constant flow device further includes a sleeve, which is installed in the mounting cavity and located between the adjusting seat and the first wall. The sleeve has a guide channel extending through it along the axial direction. The guide channel is connected to the fluid inlet. A constant flow hole is formed on the side wall of the sleeve. The guide channel is connected to the fluid outlet through the constant flow hole.

[0022] The piston is movably disposed within the guide channel, the outer peripheral wall of the piston is fitted against the inner peripheral wall of the sleeve, and the fluid channel is connected to the fluid outlet through the constant flow hole; wherein,

[0023] In the projection of a plane parallel to the axial direction, the piston is located between the fluid inlet and the constant flow orifice, and at least a portion of the constant flow orifice is located on the movement path of the piston.

[0024] Optionally, a piston through-hole is formed at the end of the piston near the first wall, and the diameter of the piston through-hole is smaller than the diameter of the fluid inlet.

[0025] Optionally, a plurality of the constant flow holes are arranged in a circumferential array along the sleeve; and / or

[0026] A third sealing ring is provided between the sleeve and the housing, and the third sealing ring is sealed to both the sleeve and the housing; and / or

[0027] The outer peripheral wall of the piston is formed with grooves that extend in its circumferential direction and are spaced apart or continuous in its axial direction.

[0028] Optionally, the constant current device further includes:

[0029] At least two spaced-apart outlet pipes, with a deformable section provided between adjacent outlet pipes, and the outlet pipes, the deformable section, and the fluid outlet are connected;

[0030] A sealing plate, which is inserted into the deformable part;

[0031] A drive device for driving the sealing plate to move within the deformable portion, thereby blocking or opening one of the outlet pipes.

[0032] Optionally, the sealing plate is configured to rotate relative to the housing about a pivot axis. The sealing plate includes a first end and a second end opposite to each other along the length direction of the sealing plate. The first end is connected to the housing, and the second end is connected to the driving device. The driving device is capable of driving the sealing plate to rotate about the pivot axis.

[0033] The portion where the deformable part connects to the sealing plate forms the pivot shaft.

[0034] Optionally, the drive device is telescopic, and the movable end of the drive device is connected to the second end of the sealing plate;

[0035] The movable end of the drive device is provided with a locking portion and a rolling element spaced apart along the length direction of the drive device, and the second end is located between the locking portion and the rolling element.

[0036] Optionally, the constant current device further includes a bracket, which includes a first bracket and a second bracket arranged at an angle. The first bracket is connected to the housing, and the second bracket is connected to the drive device. The included angle between the first bracket and the second bracket is ≤90°.

[0037] Optionally, the housing is formed with a through groove for mounting the sealing plate, the sealing plate passing through the through groove, and a plurality of the through grooves are arranged circumferentially around the deformable part. Attached Figure Description

[0038] The following drawings, which illustrate embodiments of the present invention, are incorporated herein as part of the present invention for understanding the invention. The drawings show embodiments of the present invention and their descriptions, serving to explain the principles of the present invention. In the drawings,

[0039] Figure 1 This is a three-dimensional exploded view of a preferred embodiment of the constant current device of this utility model;

[0040] Figure 2 This is a cross-sectional schematic diagram of the valve body assembly of a constant flow device according to a preferred embodiment of the present invention.

[0041] Figure 3 This is a cross-sectional schematic diagram of the valve body assembly of the constant flow device according to another preferred embodiment of the present invention.

[0042] Figure 4 This is a three-dimensional schematic diagram of the valve body assembly of a constant flow device according to a preferred embodiment of the present invention.

[0043] Figure 5 This is a schematic diagram of the internal structure of the valve opening and closing assembly of a constant flow device according to a preferred embodiment of the present invention.

[0044] Figure 6 This is a front view schematic diagram of the valve opening and closing assembly of a constant flow device according to a preferred embodiment of the present invention.

[0045] Figure 7 This is a front view schematic diagram of the valve opening and closing assembly of a constant flow device according to another preferred embodiment of the present invention.

[0046] Explanation of reference numerals in the attached figures

[0047] 100: Casing

[0048] 101: Installation cavity

[0049] 102: Fluid inlet

[0050] 103: Fluid outlet

[0051] 104: Export Channel

[0052] 105: Through slot

[0053] 110: First Wall

[0054] 120: The Second Wall

[0055] 130: Export Pipeline

[0056] 140: Deformable part

[0057] 150: Reinforcing rib

[0058] 200: Adjustable seat

[0059] 210: Ontology Department

[0060] 211: Center through hole

[0061] 220: Adjusting rod

[0062] 221: convex platform

[0063] 222: First sealing ring

[0064] 230: Second sealing ring

[0065] 300: Piston

[0066] 301: Fluid Channel

[0067] 302: Piston through hole

[0068] 303: Groove

[0069] 400: Elastic element

[0070] 500: End Cap

[0071] 600: Sleeve

[0072] 601: Guiding Channel

[0073] 602: Constant flow hole

[0074] 610: Third sealing ring

[0075] 700: Sealing plate

[0076] 710: First end

[0077] 720: Second end

[0078] 800: Drive unit

[0079] 810: Active component

[0080] 811: Slide

[0081] 820: Follower

[0082] 821: Connector

[0083] 822: Rolling parts

[0084] 900: Bracket

[0085] 910: First stent

[0086] 920: Second stent Detailed Implementation

[0087] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the present invention.

[0088] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0089] In this document, ordinal numbers such as "first" and "second" used in this invention are merely identifiers and do not have any other meaning, such as a specific order. Moreover, for example, the term "first component" does not imply the existence of "second component," and the term "second component" does not imply the existence of "first component."

[0090] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0091] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0092] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.

[0093] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0094] This utility model provides a constant flow device, including a valve body assembly and a valve opening and closing assembly.

[0095] Reference Figures 1 to 4 The valve body assembly includes a housing 100, an adjusting seat 200, a piston 300, and an elastic element 400.

[0096] The housing 100 is the main load-bearing structure of the entire constant flow device, and an internal mounting cavity 101 is formed therein to secure and reliably operate the internal components. The housing 100 has a first wall 110 and a second wall 120. The second wall 120 is connected to the outer peripheral edge of the first wall 110 and encloses the mounting cavity 101 with the first wall 110. The first wall 110 has a fluid inlet 102 for fluid entry. The second wall 120 has a fluid outlet 103 for fluid exit and connection to an external pipe. Optionally, the central axis of the fluid inlet 102 and the central axis of the fluid outlet 103 may intersect or be non-plane, allowing for layout optimization based on different installation space constraints.

[0097] The adjusting seat 200 is at least partially installed within the mounting cavity 101 of the housing 100 and is spaced apart from the first wall 110, forming a space for the piston 300 to move. The adjusting seat 200 provides support for the elastic member 400 and defines the range of motion of the piston 300.

[0098] The piston 300 is installed into the mounting cavity 101, forming a fluid channel 301 that extends axially. The fluid channel 301 is connected to the fluid inlet 102 and the fluid outlet 103. The piston 300 can move between the first wall 110 and the adjusting seat 200 to adjust the fluid flow rate at the fluid outlet 103. In this design, the piston 300 can automatically adjust its position according to changes in fluid pressure, ultimately achieving a stable flow rate at the fluid outlet 103.

[0099] One end of the elastic element 400 is connected to the adjusting seat 200, and the other end is connected to the piston 300. The elastic element 400 provides an elastic force to the piston 300 to move towards the first wall 110. Optionally, the elastic element 400 is a coil spring or a bellows spring. The elastic element 400 provides a restoring force to ensure that when the pressure of the fluid on the piston 300 decreases, the piston 300 can return to its initial position, ensuring the automatic flow regulation function.

[0100] In this design, through the dynamic balance between the elastic element 400 and the fluid pressure, the piston 300 can adjust its position under different pressure conditions, thereby achieving automatic flow control and maintaining the flow rate through the fluid outlet 103 within a stable range. The entire device can maintain a constant flow output without external control.

[0101] In this design, when pressure changes abruptly, piston 300 adaptively slides to mitigate the instantaneous impact force, rather than rigidly resisting it, thus reducing the effects of water hammer. The spring absorbs some of the water hammer energy, reducing the direct impact of the shock wave on the valve body and protecting the constant flow device from damage. Through the sliding adjustment of piston 300 and the buffering effect of elastic element 400, this design effectively reduces the damage of water hammer to the constant flow device and improves its durability.

[0102] In this solution, the preset flow rate of the constant flow device can be adjusted to meet different customer needs.

[0103] In some embodiments of this invention, the adjusting seat 200 is installed in the mounting cavity 101 and is detachably connected to the housing 100 for easy replacement or adjustment. The installation position of the adjusting seat 200 affects the initial preload and maximum stroke of the piston 300, thereby affecting the flow regulation range and accuracy.

[0104] Optionally, by replacing the adjusting seat 200 with a different model, the distance between the adjusting seat 200 and the first wall 110 can be adjusted. This solution affects the initial preload of the piston 300, the force of the elastic element 400, and the maximum stroke of the piston 300 by adjusting the distance between the adjusting seat 200 and the first wall 110, thereby ultimately achieving flow regulation.

[0105] In some embodiments of this utility model, the adjusting seat 200 includes a body portion 210 and an adjusting rod 220 mounted on the body portion 210. One end of the adjusting rod 220 is connected to the elastic member 400, and the other end of the adjusting rod 220 is exposed outside the adjusting seat 200. The adjusting rod 220 is threadedly connected to the body portion 210, and the distance between the adjusting rod 220 and the first wall 110 is adjustable. Optionally, in this embodiment, the adjusting seat 200 is detachably connected.

[0106] Optionally, one end of the adjusting rod 220 is connected to the elastic element 400, while the other end is exposed outside the body 210, making it convenient for the operator to adjust it externally.

[0107] The elastic element 400 applies a force to the piston 300 via the adjusting rod 220. The magnitude of this force determines the initial preload of the piston 300 and its movement capability under fluid action. The adjusting rod 220 is threadedly connected to the body portion 210, allowing the adjusting rod 220 to be adjusted axially within the body portion 210. By rotating the adjusting rod 220, the relative position between the adjusting rod 220 and the body portion 210 can be precisely controlled, thereby changing the distance between the adjusting rod 220 and the first wall 110. In this embodiment, the threaded connection provides a stronger adjustment locking force, preventing distance instability or misadjustment due to vibration or pressure changes during adjustment, thus ensuring the stability of flow regulation.

[0108] Optionally, the main body 210 and the adjusting rod 220 are coaxially arranged. A central through hole 211 is provided inside the main body 210, through which the adjusting rod 220 passes and is coaxially arranged with the main body 210. This coaxial arrangement facilitates the assembly of the adjusting seat 200 and makes the force transmission more uniform and stable, avoiding uneven force on the elastic element 400 or skewed movement of the piston 300 due to misalignment.

[0109] Optionally, a boss 221 is provided at the end of the adjusting rod 220 near the elastic member 400, and the radial dimension of the boss 221 is larger than the radial dimension of the central through hole 211. The boss 221 is provided to prevent the adjusting rod 220 from dislodging from the body 210 during adjustment.

[0110] A first sealing ring 222 is provided at the end of the adjusting rod 220 near the elastic member 400. The first sealing ring 222 is sealed between the body part 210 and the adjusting rod 220. The first sealing ring 222 is installed at the end of the adjusting member near the elastic member 400 and fits tightly with the body part 210 and the adjusting member to form an effective sealing structure.

[0111] Based on the above embodiments, the constant current device further includes an end cover 500, which is detachably mounted to the housing 100, and the adjusting seat 200 is mounted to the housing 100 via the end cover 500. Optionally, the end cover 500 and the housing 100 are connected by bolts.

[0112] Based on the above embodiments, corresponding scales or serial numbers can be set on the end cap 500 or the adjustment seat 200 to visualize the preset flow rate.

[0113] In some other embodiments of this invention, different elastic elements 400 can be replaced to adjust the preset flow rate of the constant flow device.

[0114] The elastic element 400 is a spring, and the spring's stiffness, free length, maximum compression, and restoring force can all be adjusted according to actual needs. Optionally, the adjustment of the elastic element 400 can be achieved by limiting the installation space of the elastic element 400 (adjusting seat 200 and piston 300), or by limiting the performance of the elastic element 400 itself.

[0115] Optionally, at least a portion of the elastic element 400 extends into the fluid channel 301. By partially extending the elastic element 400 into the fluid channel 301, the additional space required for the elastic element 400 can be reduced, and the elastic element 400 no longer occupies additional space, saving the size of the internal structure and making the overall size of the device more compact.

[0116] Optionally, a piston through-hole 302 is formed at the end of the piston 300 near the first wall 110. In some other embodiments of the present invention, the relative dimensions of the fluid inlet 102 and the piston through-hole 302 can be adjusted to achieve the adjustment of the preset flow rate of the constant flow device.

[0117] The diameter of the piston through-hole 302 is smaller than that of the fluid inlet 102. Flow rate can be adjusted by pre-setting the diameter of the piston through-hole 302 to meet different customer needs. By adjusting the diameter of the piston through-hole 302, the flow rate per unit time can be precisely controlled, ensuring that the output flow rate meets the set requirements.

[0118] Optionally, the diameter of the piston through-hole 302 is 1-5 mm.

[0119] Optionally, the diameter of the fluid inlet 102 is 10-20 mm.

[0120] Based on the above, the preset flow rate of the constant flow device can be flexibly adjusted by replacing the elastic element 400, adjusting the spring pre-compression, replacing the adjusting seat 200, or adjusting the relative dimensions of the fluid inlet 102 and the piston through hole 302 to meet different flow rate requirements.

[0121] Continue to refer to Figures 1 to 3 Optionally, the valve body assembly also includes a sleeve 600, which is installed within the mounting cavity 101. The sleeve 600 is located between the adjusting seat 200 and the first wall 110, with its two axial ends abutting against the adjusting seat 200 and the first wall 110 respectively. The sleeve 600 is fixedly positioned within the housing 100 through this abutment at both ends. The sleeve 600 provides a guide channel 601 for mounting the piston 300, and a wire channel is formed on its side. The guide channel 601 communicates with the fluid inlet 102 and is connected to the fluid outlet 103 via a constant flow hole 602. That is, fluid entering the mounting cavity 101 flows axially into the sleeve 600, flows laterally out of the sleeve 600, and enters the fluid outlet 103.

[0122] The sleeve 600 cooperates with the piston 300, and the flow rate is regulated through the constant flow hole 602 on the side wall. The piston 300 is movably inserted into the guide channel 601 along the axial direction of the guide channel 601, and the outer peripheral wall of the piston 300 is in contact with the inner peripheral wall of the sleeve 600. After the fluid enters from the fluid inlet 102 of the housing 100, due to the extremely small gap between the piston 300 and the sleeve 600, the fluid flows through the guide channel 601 to the constant flow hole 602, and finally flows out from the fluid outlet 103.

[0123] In the projection onto a plane parallel to the axial direction, the piston 300 is located between the first wall 110 and the constant flow orifice 602, with at least a portion of the constant flow orifice 602 located on the movement path of the second end 720. The position of the piston 300 within the guide channel 601 determines the exposed area of ​​the constant flow orifice 602. When the fluid pressure increases, the piston 300 compresses the elastic element 400, moving it towards the adjusting seat 200. This increases the area of ​​the constant flow orifice 602 blocked by the outer wall of the piston 300, reducing the effective flow area. When the fluid pressure decreases, the elastic element 400 pushes the piston 300 back to its original position, reducing the blocked area and increasing the flow area. Through this dynamic adjustment, the outlet flow rate of the fluid outlet 103 tends to stabilize.

[0124] When the inlet pressure increases, the piston 300 will move towards the adjusting seat 200, gradually blocking the constant flow orifice 602 and reducing the flow rate; when the pressure decreases, the piston 300 will return to its original position under the action of the elastic element 400, gradually exposing the constant flow orifice 602 and increasing the flow rate.

[0125] According to the above scheme, the housing 100, sleeve 600, and piston 300 are arranged in a sequential manner from the outside to the inside. The housing 100 provides structural support and serves as the flow channel interface, the sleeve 600 acts as a guide component for the movement of the piston 300, and the piston 300 is used to achieve dynamic adjustment of the constant flow device.

[0126] Optionally, the outer peripheral wall of the piston 300 is formed with grooves 303 that extend in the circumferential direction and are spaced apart or continuous in the axial direction. By providing grooves 303, the contact area between the piston 300 and the sleeve 600 is reduced, thereby reducing the friction between the piston 300 and the sleeve 600.

[0127] Optionally, multiple constant flow orifices 602 are arranged in a circumferential array along the sleeve 600. The circumferential arrangement of multiple constant flow orifices 602 enables a more uniform distribution of fluid as it flows from the constant flow orifices 602 to the fluid outlet 103, thereby ensuring consistent flow distribution throughout the fluid channel 301 and reducing local pressure differences in the fluid.

[0128] In some embodiments of this utility model, a second sealing ring 230 is provided between the adjusting seat 200 and the housing 100, and the second sealing ring 230 is respectively sealed to the adjusting seat 200 and the housing 100.

[0129] In some embodiments of this utility model, a third sealing ring 610 is provided between the sleeve 600 and the housing 100, and the third sealing ring 610 is respectively sealed to the sleeve 600 and the housing 100.

[0130] Reference Figure 4 In some embodiments of this utility model, the outer periphery of the housing 100 is provided with reinforcing ribs 150 extending in the circumferential direction. Optionally, multiple reinforcing ribs 150 are spaced apart along the circumferential or axial direction of the housing 100. By providing reinforcing ribs 150, the strength of the housing 100 is improved, and the housing 100 is prevented from deforming due to water hammer.

[0131] The above scheme achieves the constant flow function of the constant flow device: by utilizing the dynamic balance between the elastic element 400 and the fluid pressure, the piston 300 adapts to different pressures and precisely controls the through-hole area of ​​the fluid outlet 103, so that the outlet flow can still be kept highly stable when the inlet pressure fluctuates or the external load changes.

[0132] The constant flow device also includes an outlet pipe 130. The outlet pipe 130 is connected to and communicates with the fluid outlet 103. There are at least two spaced-apart outlet pipes 130, and a deformable part 140 is provided between adjacent outlet pipes 130. The outlet pipes 130 and the deformable parts 140 are connected to form an outlet channel 104.

[0133] Reference Figures 5 to 7 In this design, the constant flow device also includes a valve opening and closing assembly, which comprises a sealing plate 700 and a drive device 800. The sealing plate 700 is inserted into the deformable part 140, meaning that the sealing plate 700 extends into the outlet channel 104, ensuring complete fluid blockage in the closed state to prevent leakage. The sealing plate 700 adopts a plug-in structure, tightly fitting with the deformable part 140, so that it can slide or rotate under the action of the drive device 800, thereby blocking or opening one of the outlet pipes 130.

[0134] Optionally, the deformable part 140 is constructed as a ring structure to facilitate connection with the outlet pipe 130. The deformable part 140 is made of a deformable material to adapt to the movement of the sealing plate 700. During the movement of the sealing plate 700, it can undergo appropriate deformation, thereby ensuring smooth movement of the sealing plate 700 while maintaining the sealing of the outlet channel 104 and preventing fluid leakage.

[0135] In this scheme, when the sealing plate 700 is in the blocking position, the outlet pipe 130 is closed, and fluid cannot flow out. The drive device 800 is activated, pushing the sealing plate 700 to open the outlet pipe 130, allowing fluid to drain out. The drive device 800 then moves the sealing plate 700 in the reverse direction, returning it to the blocking position, closing the outlet pipe 130, and stopping fluid flow.

[0136] In some embodiments of this invention, the sealing plate 700 is constructed as a lever structure, rotating on the housing 100 via a fulcrum pivot to control the opening and closing of the valve. This lever structure allows for the rotation of the sealing plate 700 with a relatively small driving force, achieving efficient valve opening and closing.

[0137] Optionally, the sealing plate 700 is configured to rotate relative to the housing 100 about a pivot axis. The sealing plate 700 includes a first end 710 and a second end 720 opposite to each other along its length. The first end 710 is connected to the housing 100, and the second end 720 is connected to a drive device 800, which is capable of driving the sealing plate 700 to rotate about the pivot axis. The portion of the deformable portion 140 connected to the sealing plate 700 forms the pivot axis.

[0138] The connection area between the deformable part 140 and the sealing plate 700 forms an elastic support point, so that when the driving device 800 drives the sealing plate 700, the sealing plate 700 can rotate around the elastic support point.

[0139] Based on the above, the drive device 800 can drive the sealing plate 700 to move. Optionally, the drive device 800 is telescopic, and the movable end of the drive device 800 is connected to the second end 720 of the sealing plate 700. Since the sealing plate 700 adopts a lever structure, the drive device 800 needs to be able to adapt to different rotation angles and stroke requirements; the telescopic structure can flexibly adjust the output stroke.

[0140] The drive unit 800 includes a driving member 810 and a driven member 820. The driving member 810 is connected to the housing 100. One end of the driven member 820 is movably connected to the driving member 810, and the other end is connected to a second end 720. The driven member 820 can be driven by the driving member 810 to drive the sealing plate 700 to move.

[0141] Optionally, the drive device 800 can be a stepper motor, a servo motor, a cylinder, a hydraulic cylinder, or an electromagnetic drive. The following description assumes that the drive device 800 is an electromagnetic drive.

[0142] Optionally, the driving element 810 is an electromagnetic coil, and a slide rail 811 is provided inside the electromagnetic coil. The driven element 820 is a plunger, which is slidably connected to the slide rail 811. The movement of the plunger is transmitted through a connecting rod or directly connected to the second end 720 of the sealing plate 700, causing the sealing plate 700 to rotate around the pivot axis, thereby realizing the opening and closing function.

[0143] The movable end of the drive device 800 (i.e., the other end of the driven member 820) is provided with a locking portion 821 and a rolling member 822 spaced apart along the length of the drive device 800. The second end 720 is located between the locking portion 821 and the rolling member 822. The rolling member 822 provides rolling support, reducing the resistance when the drive device 800 drives the sealing plate 700 and improving the smoothness of movement. The locking portion 821 and the rolling member 822 cooperate to achieve a stable connection with the sealing plate 700, preventing the sealing plate 700 from loosening or shifting during operation. Through reasonable constraints, the sealing plate 700 always rotates along a predetermined path, improving the reliability of the opening and closing action.

[0144] Optionally, the sealing plate 700 is provided with a guide slope adapted to the snap-fit ​​portion 821 and the rolling element 822. Optionally, the rolling element 822 is a roller, and the rolling element 822 cooperates with the sealing plate 700 to reduce the relative friction between the sealing plate 700 and the drive device 800 when the sealing plate 700 moves.

[0145] In some embodiments of this invention, the constant current device further includes a bracket 900, which is used to fix the drive device 800 to ensure that it does not shift or deform during operation. The bracket 900 includes a first bracket 910 and a second bracket 920 arranged at an angle. The first bracket 910 is connected to the housing 100, and the second bracket 920 is connected to the active component 810 of the drive device 800. By setting the bracket 900, the drive device 800 can be mounted to a more robust part of the housing 100, thereby improving the overall strength of the constant current device.

[0146] Alternatively, the bracket 900 may be made of high-strength metal (such as aluminum alloy or stainless steel) or engineering plastic to improve durability and corrosion resistance.

[0147] Optionally, the included angle between the first bracket 910 and the second bracket 920 is ≤90°. The included angle between the first bracket 910 and the second bracket 920 can be, but is not limited to, 90°, 85°, 80°, etc., and is preferably 85°. By limiting this range, it is ensured that the installation angle of the drive device 800 is reasonable, making the drive device 800 drive the sealing plate 700 more smoothly, and also making the connection between the drive device 800 and the housing 100 more secure.

[0148] Reference Figure 6 and Figure 7In some embodiments of this utility model, the housing 100 has a through groove 105 for mounting the sealing plate 700. The sealing plate 700 passes through the through groove 105, and multiple through grooves 105 are spaced apart circumferentially around the deformable portion 140. The through groove 105 limits the movement path of the sealing plate 700 to a certain extent, enabling the sealing plate 700 to stably open and close the outlet channel 104, and preventing the sealing plate 700 from shaking, shifting, or tilting. Multiple through grooves 105 are arranged uniformly or non-uniformly circumferentially around the deformable portion 140 of the housing 100. The sealing plate 700 can be installed in different through grooves 105, thus achieving different initial angles. By providing multiple through grooves 105, the sealing plate 700 can be installed at different angles, adapting to more usage environments and improving compatibility.

[0149] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Terms such as “set” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0150] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this utility model to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this utility model, and all such variations and modifications fall within the scope of protection claimed by this utility model.

Claims

1. A constant current device, characterized by, The constant flow device comprises: a housing having a first wall and a second wall connected to the first wall and enclosing a mounting cavity with the first wall, the first wall being formed with a fluid inlet, and the second wall being formed with a fluid outlet; an adjusting seat at least partially mounted in the mounting cavity, the adjusting seat being opposite and spaced apart from the first wall; a piston mounted in the mounting cavity, the piston being formed with a fluid passage in the axial direction, the fluid passage being in communication with the fluid inlet and the fluid outlet respectively, the piston being movable between the first wall and the adjusting seat to adjust the fluid flow of the fluid outlet; a resilient member having one end connected to the adjusting seat and the other end connected to the piston, the resilient member being used to provide an elastic force to the piston to move towards the first wall; wherein the adjusting seat is detachably connected to the housing; and / or the adjusting seat comprises a body portion and an adjusting rod used to connect with the resilient member, the distance between the adjusting rod and the first wall being adjustable.

2. The constant current device of claim 1, wherein The constant flow device further comprises an end cover detachably mounted to the housing, and the adjusting seat is positioned and mounted to the housing via the end cover.

3. The constant current device according to claim 1 or 2, characterized in that, The constant flow device satisfies at least one of the following conditions: (1) the adjusting rod is connected to the adjusting seat by screwing; (2) the end of the adjusting rod away from the resilient member is exposed to the body portion; (3) the end of the adjusting rod close to the resilient member is provided with a boss; (4) the end of the adjusting rod close to the resilient member is provided with a first sealing ring, the first sealing ring being sealingly connected between the body portion and the adjusting rod; (5) a second sealing ring is provided between the adjusting seat and the housing, the second sealing ring being sealingly connected to the adjusting seat and the housing respectively; (6) the outer periphery of the housing is provided with a reinforcing rib extending in the circumferential direction.

4. The constant current device of claim 1, wherein, The constant flow device further comprises a sleeve mounted in the mounting cavity and located between the adjusting seat and the first wall, the sleeve being provided with a guide passage in the axial direction, the guide passage being in communication with the fluid inlet, and the side wall of the sleeve being formed with a constant flow through hole, the guide passage being in communication with the fluid outlet via the constant flow through hole; the piston is movably arranged in the guide passage, the outer peripheral wall of the piston being fitted to the inner peripheral wall of the sleeve, and the fluid passage being in communication with the fluid outlet via the constant flow through hole; wherein in the projection in the plane parallel to the axial direction, the piston is located between the fluid inlet and the constant flow through hole, and at least part of the constant flow through hole is located on the moving path of the piston.

5. The constant current device of claim 1 or 4, wherein The end of the piston close to the first wall is formed with a piston through hole, the hole diameter of the piston through hole being smaller than the hole diameter of the fluid inlet.

6. The constant flow device according to claim 4, wherein a plurality of the constant flow through holes are arranged in an array in the circumferential direction of the sleeve; and / or A third sealing ring is arranged between the sleeve and the housing, and is sealingly connected with the sleeve and the housing respectively; and / or The outer peripheral wall of the piston is formed with grooves extending in the circumferential direction and spaced apart or continuous in the axial direction.

7. The constant current device of claim 1, wherein The constant flow device further comprises: At least two spaced apart outlet pipes, a deformable portion is arranged between adjacent outlet pipes, the outlet pipes, the deformable portion and the fluid outlet are in communication; A sealing plate is inserted into the deformable portion; A driving device is used to drive the sealing plate to move in the deformable portion to block or open one of the outlet pipes.

8. The constant current device of claim 7, wherein, The sealing plate is configured to rotate relative to the housing about a fulcrum, the sealing plate comprises a first end and a second end opposite in the length direction of the sealing plate, the first end is connected to the housing, the second end is connected to the driving device, and the driving device can drive the sealing plate to rotate about the fulcrum; The part of the deformable portion connected with the sealing plate forms the fulcrum.

9. The constant current device of claim 8, wherein, The driving device is retractable, and the movable end of the driving device is connected to the second end of the sealing plate. The movable end of the driving device is provided with a clamping portion and a rolling member spaced apart in the length direction of the driving device, and the second end is located between the clamping portion and the rolling member.

10. The constant current device of claim 7, wherein, The constant flow device further comprises a support, the support comprises a first support and a second support arranged at an angle, the first support is connected to the housing, the second support is connected to the driving device, and the included angle between the first support and the second support is ≤90°.

11. The constant current device of claim 7, wherein, The housing is formed with through grooves for mounting the sealing plate, the sealing plate is arranged in the through grooves, and a plurality of through grooves are arranged around the periphery of the deformable portion.

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