Constant flow throttle unloading multi-functional valve

Abstract

The present invention relates to a constant-current throttling unloading multi-functional valve, comprising: a valve body having a water inlet, a water outlet, an unloading port, a first channel, a second channel and a valve port, the second channel being communicated with the valve port, the water outlet and the unloading port; a first valve core disposed in the first channel, one end being spaced from the pore wall of the first channel, the other end being in sliding clearance seal with the pore wall of the first channel and dividing the first channel into a first space and a second space communicating with the second channel, the first space being communicated with the water inlet and the valve port; a first elastic member disposed in the second space and abutted against the valve body and the first valve core; a second valve core disposed in the valve body and elastically abutted against the unloading port, and moving away from the unloading port when the water pressure is greater than a set value; a feed rod threadedly connected to the valve body; a third valve core, one end being elastically abutted in the second channel and the other end being capable of abutting against the feed rod, for moving under the push of the feed rod to adjust the water inlet cross-sectional area of the valve port; integrating constant-current, unloading and throttling functions in one valve body.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to a constant-flow throttling unloading multi-purpose valve. Background Art

[0002] With the continuous improvement of computer technology, automatic control technology, and people's living standards, intelligent toilet covers with a flushing waterway system and a cleaning waterway system that can achieve ordinary cleaning and female cleaning have gradually gained people's favor for their advantages such as intelligent cleaning, cleanliness, preheating comfort, convenient operation, energy saving, and power saving.

[0003] At present, both the flushing waterway system and the cleaning waterway system of intelligent toilet covers include functional components such as a throttling component that can achieve a throttling function, a pressure regulating component that controls the pressure to be constant when outputting the flow rate, and an unloading component that is used to achieve a pressure relief function. However, the existing throttling component, pressure regulating component, and unloading component are connected to the waterway system as separate components, which need to be fixed separately and connected through pipelines, resulting in a complex structure of the waterway system, a relatively large overall volume, a large occupied structural space, poor system stability, and a large pressure loss due to multiple connections. There is also a risk of leakage at the pipeline joints, and the product performance is poor. Summary of the Invention

[0004] Based on this, in view of the problems of the relatively large volume and poor product performance caused by the large number of functional components in the existing cleaning waterway system, it is necessary to provide a constant-flow throttling unloading multi-purpose valve.

[0005] A constant-flow throttling unloading multi-purpose valve includes:

[0006] A valve body having a water inlet, a water outlet, an unloading port, a first channel, a second channel, and a valve port, wherein the second channel is communicated with the valve port, the water outlet, and the unloading port;

[0007] A first valve core disposed in the first channel, with one end spaced from the pore wall of the first channel and the other end in sliding clearance seal with the pore wall of the first channel and dividing the first channel into a first space and a second space communicating with the second channel, and the first space is communicated with the water inlet and the valve port;

[0008] A first elastic member disposed in the second space and abutting against the valve body and the first valve core;

[0009] A second valve core disposed in the valve body and elastically abutting against the unloading port, and moving away from the unloading port when the water pressure is greater than a set value;

[0010] A feed rod threadedly connected to the valve body;

[0011] The third spool valve has one end elastically abutted in the second channel and the other end capable of abutting against the feed rod, and is used to move under the push of the feed rod to adjust the water inlet cross-sectional area of the valve port.

[0012] In the above constant flow throttle unloading multi-functional valve, when the water pressure changes, a pressure difference is formed between the first space and the second space. The first spool valve moves under the action of the pressure difference, causing the first elastic member to deform. When the first spool valve is in force balance, the pressure difference between the first space and the second space is a fixed value, and the flow rate at the valve port is a fixed value, ensuring that the flow rate entering the second channel through the valve port is constant and the water flow rate discharged from the water outlet is constant. It can automatically adjust the pressure difference internally when the pressure increases to ensure a constant flow rate at the output end. When the water pressure at the unloading port is less than the set value, the second spool valve abuts in the unloading port, and the water flow cannot flow out from the unloading port. When the water pressure at the unloading port is greater than the set value, the second spool valve moves away from the unloading port under the action of the water pressure at the unloading port, and the water flow can flow out from the unloading port for convenient unloading. When the feed rod is rotated forward, the feed rod moves towards the inside of the valve body. The feed rod pushes the third spool valve that abuts against it to move towards the valve port in the second channel. The third spool valve blocks the valve port, reducing the water inlet cross-sectional area of the valve port. When the feed rod is rotated backward, the feed rod moves towards the outside of the valve body, and the spool valve moves away from the valve port together with the feed rod. The third spool valve moves away from the end face of the valve port, increasing the water inlet cross-sectional area of the valve port, enabling precise adjustment of the water inlet cross-sectional area of the valve port and thus precisely controlling the throttling area. Therefore, the above constant flow throttle unloading multi-functional valve integrates the functions of constant flow, unloading, and throttling on one valve body. The water inlet cross-sectional area of the valve port is adjusted by the feed rod and the third spool valve to a fixed flow rate. The first spool valve and the first elastic member are used to automatically adjust the pressure difference when the water pressure increases, keeping the flow rate unchanged. The second spool valve realizes the unloading function when the water pressure is too high. And it eliminates the pipeline and the installation parts matching the pipeline, reduces the leakage risk, the assembly process is relatively simple and convenient, resulting in high production efficiency, low production cost, small structural size, good system stability, and good product performance.

[0013] In one embodiment, the valve body includes a cavity, a top cover, a bottom cover, and a side cover, where:

[0014] The cavity and the top cover are fixedly connected, and a first sealing member is provided therebetween. The cavity forms a water inlet, the water outlet, and the unloading port, and internally forms the valve port, a first stepped hole, a first slot hole, and a first through hole connecting the first slot hole and the first stepped hole. The large hole of the first stepped hole and the first slot hole respectively open on the surface of the cavity facing the top cover. The small hole of the first stepped hole is connected to the valve port and the water inlet. The axis of the first slot hole is parallel to the axis of the first stepped hole and communicates with the valve port, the water outlet, and the unloading port;

[0015] The side cover has a first end and a second end along the axis of the unloading port. The first end is sealed and sleeved on the unloading port and locked thereto, and the second valve core is elastically connected inside the second end.

[0016] The bottom cover is hermetically fixed to the end face of the cavity, and is provided with a first threaded hole penetrating through its thickness and coaxial with the first slot hole. The first threaded hole is threadedly connected to the feed rod.

[0017] In one embodiment, the first valve core includes a partition plate and a valve stem protruding from the partition plate, wherein:

[0018] The partition plate is slidably embedded in the large hole of the first stepped hole. Along the direction perpendicular to the axis of the large hole of the first stepped hole, the cross-sectional area of the partition plate is not less than the area of the large hole of the first stepped hole.

[0019] The valve stem is inserted into the small hole of the first stepped hole. Along the direction perpendicular to the axis of the large hole of the first stepped hole, the cross-sectional area thereof is smaller than the area of the small hole of the first stepped hole.

[0020] In one embodiment, the small hole of the first stepped hole includes a second slot hole and a first groove. The second slot hole is coaxial with the large hole of the first stepped hole and is communicated with the opening. The first groove opens on the hole wall of the second slot hole and extends from the bottom of the large hole of the first stepped hole to the bottom of the second slot hole. The first groove is communicated with the valve port.

[0021] In one embodiment, the valve stem includes a first rod portion, a second rod portion and a third rod portion protruding from the partition plate in sequence, wherein:

[0022] Along the direction perpendicular to the axis of the large hole of the first stepped hole, the cross-sectional areas of the first rod portion and the third rod portion are the same and are the same as the cross-sectional area of the second slot hole, and the cross-sectional area of the second rod portion is smaller than the cross-sectional area of the first rod portion.

[0023] The first valve core further includes a third slot hole. The third slot hole opens on the end face of the partition plate facing away from the valve stem and extends a certain depth into the interior of the first rod portion. A first connection hole communicating the third slot hole and the second channel is formed inside the first elastic member.

[0024] The first valve core further includes a second stepped hole. The large hole of the second stepped hole opens on the end face of the third rod portion away from the second rod portion, and the small hole of the second stepped hole extends to one end of the second rod portion close to the first rod portion.

[0025] In one embodiment, the constant flow throttling unloading multi-purpose valve further includes a second seal. The first end has a third stepped hole. The large hole of the third stepped hole opens at the end face of the first end. The third stepped hole has a third stepped surface parallel to the end face of the first end. The second seal is arranged on the third stepped surface. An inner first thread is provided on the wall of the large hole of the third stepped hole, and an outer first thread matching the inner first thread is provided on the outer wall of the unloading port.

[0026] In one embodiment, the constant flow throttling unloading multi-purpose valve further includes a second elastic member. The second end has a fourth stepped hole. The large hole of the fourth stepped hole opens at the third stepped surface. The small hole of the fourth stepped hole extends to the end face of the second end. The fourth stepped hole has a fourth stepped surface parallel to the end face of the first end. The second elastic member is located in the large hole of the fourth stepped hole, with one end fixed on the fourth stepped surface and the other end fixedly connected to the second valve core. The elastic direction is parallel to the axis of the unloading port, and a second connection hole communicating with the side cover is formed inside.

[0027] In one embodiment, the end of the unloading port has a fifth stepped hole. The large hole of the fifth stepped hole opens at the end face of the unloading port. The valve core has a small end and a large end along the axis direction of the unloading port. The opening area of the small hole of the fifth stepped hole is larger than the cross-sectional area of the small end and smaller than the cross-sectional area of the large end.

[0028] In one embodiment, the constant flow throttling unloading multi-purpose valve further includes a third seal. One end of the third seal is located between the bottom cover and the cavity. When the bottom cover is fixed on the cavity, the bottom cover and the cavity jointly squeeze the third seal. The third seal bends and extends to form a groove, and the other end is integrally formed with the third valve core.

[0029] In one embodiment, the constant flow throttling unloading multi-purpose valve further includes a third elastic member. The third elastic member is arranged in the second channel and abuts on the opposite surfaces of the third valve core and the top cover.

[0030] In one embodiment, the constant flow throttling unloading multi-purpose valve further includes a switch module. The switch module includes a housing, a driving unit and a top plug arranged in the housing, wherein:

[0031] The water inlet is connected to the first channel through a valve hole;

[0032] The housing is fixed on the valve body and is connected to the water inlet;

[0033] The driving unit is connected to the top plug and is used to drive the top plug to insert into and tightly press against the valve hole or to leave the valve hole. Description of the Drawings

[0034] Figure 1 FIG. 6 is a schematic structural view of a constant flow throttle unloading multi-functional valve provided by the present invention;

[0035] Figure 2 FIG. 7 is an exploded view of a constant flow throttle unloading multi-functional valve provided by the present invention;

[0036] Figure 3 FIG. 8 is a sectional view of a constant flow throttle unloading multi-functional valve provided by the present invention;

[0037] Figure 4 FIG. 9 is a partial sectional view of a constant flow throttle unloading multi-functional valve provided by the present invention.

[0038] Reference Numerals:

[0039] 10. Constant flow throttle unloading multi-functional valve;

[0040] 100. Valve body;

[0041] 110. Water inlet; 120. Water outlet; 130. First channel; 131. First space; 132. Second space; 140. Second channel; 150. Valve port; 160. Unloading port; 161. Fifth stepped hole;

[0042] 170. Cavity; 171. First stepped hole; 1711. Second slot hole; 1712. First groove; 172. First through hole; 173. First slot hole; 181. Top cover; 182. Bottom cover; 1821. First threaded hole; 183. Valve hole; 190. Side cover; 191. First side cover end; 192. Second side cover end; 1911. Third stepped hole; 1912. Third step surface; 1913. Fourth stepped hole; 1914. Fourth step surface;

[0043] 200. First elastic member; 210. First connection hole;

[0044] 300. First valve core;

[0045] 310. Partition plate; 320. Valve stem; 321. First rod portion; 322. Second rod portion; 323. Third rod portion; 330. Third slot hole; 340. Second stepped hole;

[0046] 400. Second valve core; 410. Small end; 420. Large end;

[0047] 500. Feed rod;

[0048] 600. Third valve core;

[0049] 700, the first seal;

[0050] 800, the second seal;

[0051] 900, the third seal; 910, the groove;

[0052] 101, the second elastic member; 1011, the second connection hole;

[0053] 102, the third elastic member;

[0054] 103, the switch module; 1031, the housing; 1032, the driving unit; 1033, the plug; 1034, the elastic structure. Detailed implementation manners

[0055] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0057] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0058] In the present invention, unless otherwise clearly specified or defined, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise clearly specified or defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0060] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0061] The following introduces the technical solutions provided by the embodiments of the present invention in conjunction with the accompanying drawings.

[0062] As Figure 1 , Figure 2 and Figure 3 shown, the present invention provides a constant flow throttle unloading multi-functional valve 10, including a valve body 100. The valve body 100 integrates constant flow, unloading and throttling functions, eliminates pipelines and installation parts matching the pipelines, reduces the risk of leakage, has a relatively simple and convenient assembly process, enables a relatively high production efficiency, a relatively low production cost, a relatively small structural size, and good system stability and product performance.

[0063] In order to automatically adjust the pressure difference internally when the water pressure changes to ensure a constant flow rate at the output end. The constant flow throttle unloading multi-functional valve 10 further includes a first elastic member 200 and a first valve core 300, wherein:

[0064] The valve body 100 is formed with a water inlet 110 and a water outlet 120. The water inlet 110 is connected to the water circuit system, and the water outlet 120 is connected to other control water circuits or directly connected to the feminine wash and bidet nozzles. The valve body 100 is formed with a first channel 130, a second channel 140, and a valve port 150. The valve port 150 communicates the first channel 130 and the second channel 140. The second channel 140 is connected to the water outlet 120, and the first channel 130 is connected to the water inlet 110. Water flows into the first channel 130 from the water inlet 110, passes through the valve port 150 into the second channel 140, and finally flows out from the water outlet 120.

[0065] The first valve core 300 is arranged inside the first channel 130. The first valve core 300 has a first end and a second end along its axis. The first end is spaced from the pore wall of the first channel 130 to facilitate the flow of water. The second end is in sliding clearance seal with the pore wall of the first channel 130, and the end of the second end divides the first channel 130 into a first space 131 and a second space 132. The first space 131 is connected to the water inlet 110, and the first space 131 is connected to one end of the second channel 140 through the valve port 150. The second space 132 is connected to the other end of the second channel 140.

[0066] The first elastic member 200 is arranged inside the second space 132, and the first elastic member 200 abuts against the opposite surfaces of the valve body 100 and the first valve core 300. The elastic direction of the first elastic member 200 is parallel to the axis of the first channel 130. When specifically arranged, the first elastic member 200 can be a spring, and the first elastic member 200 can also be a columnar elastic structure.

[0067] In the above constant flow throttling unloading multi-purpose valve 10, when the water pressure changes, the water pressure P1 in the first space 131 and the water pressure P2 in the second space 132 are different to form a pressure difference. The first valve core 300 moves under the action of the pressure difference to deform the first elastic member 200. When the first valve core 300 moves until the forces on both sides are the same and stops moving, at this time, the pressure difference ΔP = P1 - P2 = K(X0 + ΔX) / A between the first space 131 and the second space 132, where the stiffness K of the first elastic member 200 and the pressure-receiving area A of the first valve core 300 are fixed values. Since the deformation amount ΔX of the first elastic member 200 is much smaller than the free length X0 of the first elastic member 200, ΔP≈KX0 / A is a fixed value, and the flow rate at the valve port 150 Since the flow coefficient Cd, the area A1 of the valve port 150, the fluid density ρ, and ΔP are all constant values, the flow rate at the valve port 150 is constant, and the flow rate of the water discharged from the water outlet 120 is constant. The change in water pressure can be an increase or decrease in the water pressure at the input end connected to the water inlet, or an increase or decrease in the water pressure at the output end connected to the water outlet. Therefore, the above constant-flow throttle unloading multi-functional valve 10 can automatically adjust the pressure difference inside when the pressure changes to ensure a constant flow rate at the output end.

[0068] To unload when the water pressure is too high, the constant-flow throttle unloading multi-functional valve 10 further includes a second valve core 400. The second valve core 400 is arranged inside the valve body 100. The valve body 100 is formed with an unloading port 160. The second valve core 400 is elastically abutted against the unloading port 160, and the second valve core 400 moves away from the unloading port 160 when the water pressure is greater than the set value. In the above constant-flow throttle unloading multi-functional valve 10, when the water pressure at the unloading port 160 is less than the set value, the second valve core abuts inside the unloading port 160, and the water flow cannot flow out from the unloading port 160. When the water pressure at the unloading port 160 is greater than the set value, the second valve core 400 moves away from the unloading port 160 under the action of the water pressure at the unloading port 160, and the water flow can flow out from the unloading port 160 to facilitate unloading.

[0069] To adjust the inlet cross-sectional area of the valve port 150 for throttling, the constant-flow throttle unloading multi-functional valve 10 further includes a feed rod 500 and a third valve core 600. The feed rod 500 is threadedly connected to the valve body 100. One end of the third valve core 600 is elastically abutted inside the second channel 140, and the other end of the third valve core 600 can abut against the feed rod 500. Rotate the feed rod 500 so that the feed rod 500 moves inside the second channel 140 through the threaded connection with the valve body 100. The feed rod 500 pushes the third valve core 600 to move, so as to adjust the positional relationship of the third valve core 600 relative to the valve port 150, and further adjust the inlet cross-sectional area of the valve port 150. In the above constant-flow throttle unloading multi-functional valve 10, when the feed rod 500 is rotated forward, the feed rod 500 moves into the valve body 100. The feed rod 500 pushes the third valve core 600 that abuts against it to move towards the valve port 150 inside the second channel 140. The third valve core 600 blocks the valve port 150 to reduce the inlet cross-sectional area of the valve port 150. When the feed rod 500 is rotated reversely, the feed rod 500 moves out of the valve body 100. The third valve core 600 moves away from the valve port 150 together with the feed rod 500. The third valve core 600 moves away from the end face of the valve port 150 to increase the inlet cross-sectional area of the valve port 150, so as to accurately adjust the inlet cross-sectional area of the valve port 150 and thus precisely control the throttling area.

[0070] The structural form of the valve body 100 has various types, such as Figure 1 、Figure 2 and Figure 3 As shown in Figure 3 , in a preferred embodiment, the valve body 100 includes a cavity 170, a top cover 181, a bottom cover 182, and a side cover 190, where:

[0071] One end of the cavity 170 is open, the top cover 181 is fixed to the cavity 170, and a first seal 700 is provided between the top cover 181 and the cavity 170. The first seal 700 is disposed on the cavity 170 and is crimped between the top cover 181 and the cavity 170 when the top cover is fixed to the cavity 170 to achieve the sealing of the constant flow throttling unloading multi-purpose valve 10.

[0072] The outer wall of the cavity 170 protrudes to form a water inlet 110, a water outlet 120, and a relief port 160. A valve port 150, a first stepped hole 171, a first through hole 172, and a first slot hole 173 are formed inside the cavity 170. The first stepped hole 171 and the top cover 181 form a first channel 130. The large hole of the first stepped hole 171 opens on the surface of the cavity 170 facing the top cover 181, and the small hole of the first stepped hole 171 is connected to the valve port 150 and the water inlet 110. The axis of the first slot hole 173 is parallel to the axis of the first stepped hole 171. The first slot hole 173 opens on the surface of the cavity 170 facing the top cover 181. The first slot hole 173 and the top cover 181 form a second channel 140, and the first slot hole 173 communicates with the valve port 150, the water outlet 120, and the relief port 160; the first through hole 172 penetrates the cavity 170 between the first slot hole 173 and the first stepped hole 171, and the first through hole 172 is disposed close to the top cover 181.

[0073] The side cover 190 has opposite first side cover ends 191 and second side cover ends 192 along the axis direction of the relief port 160. The first side cover end 191 is sleeved on the relief port 160 of the water circuit system 20. A second seal 800 is provided between the first side cover end 191 and the relief port 160 to seal the first side cover end 191 and the relief port 160, and the first side cover end 191 is locked and connected to the relief port 160 as a whole. The second side cover end 192 connects the water flow into the water storage tank through a water pipe. The second valve core 400 is elastically connected inside the second side cover end 192.

[0074] The bottom cover 182 is provided with a first threaded hole 1821 that penetrates the thickness of the bottom cover 182 along the axial direction parallel to the axis of the first slot hole 173. Preferably, the axis of the first threaded hole 1821 coincides with the axial direction of the first slot hole 173. The bottom cover 182 is arranged on the end face of the cavity 170. A third seal 900 is arranged between the bottom cover 182 and the cavity 170. When the bottom cover 182 and the cavity 170 are fixed together, the third seal 900 is pressed between the bottom cover 182 and the cavity 170. The first threaded hole 1821 is used for threaded connection with the feed rod 500. The feed rod 500 has threads matching the first threaded hole 1821. The feed rod 500 is connected to the first threaded hole 1821 through the threaded action, so that when the feed rod 500 rotates, the feed rod 500 moves along the axis of the first threaded hole 1821 through the threaded action of the external thread 210 and the first threaded hole 1821. And when the feed rod 500 moves to the position of the third valve core 600, the feed rod 500 can abut against the third valve core 600 to drive the third valve core 600 to move accordingly.

[0075] Based on the above valve body 100, the structural form of the first valve core 300 has various types. In a preferred embodiment, the first valve core 300 includes a partition 310 and a valve stem 320 protruding from the partition. The partition 310 is embedded in the large hole of the first stepped hole 171. The partition 310 is slidable relative to the large hole of the first stepped hole 171. And in the direction perpendicular to the axis of the first stepped hole 171, the cross-sectional area of the partition 310 is equal to or larger than the area of the large hole of the first stepped hole 171, so that the partition 310 divides the first channel 130 into a first space 131 and a second space 132. The valve stem 320 is inserted into the small hole of the first stepped hole 171. And in the direction perpendicular to the axis of the first stepped hole 171, the cross-sectional area of the valve stem 320 is smaller than the area of the small hole of the first stepped hole 171. The valve stem 320 slides in the small hole of the first stepped hole 171. In the above constant flow throttling unloading multi-functional valve 10, the pressure difference pushes the valve stem 320 to move. The valve stem 320 drives the partition 310 fixed thereto to move accordingly. The first elastic member 200 deforms. At the same time, the water flows between the small hole of the first stepped hole 171, the valve port 150, the second channel 140, and the second space 132, so that the valve stem 320. When the first valve core is in force balance, the water flow rates discharged from the valve port 150 and the water outlet 120 are constant.

[0076] The structural form of the first stepped hole 171 has various types, such as Figure 1 , Figure 2 and Figure 3As shown, specifically, the small hole of the first stepped hole 171 includes a second slot hole 1711 and a first groove 1712. The second slot hole 1711 is coaxial with the large hole of the first stepped hole 171, and the second slot hole 1711 is communicated with the water inlet 110. The first groove 1712 opens on the hole wall of the second slot hole 1711, and the first groove 1712 extends from the bottom of the large hole of the first stepped hole 171 to the bottom of the second slot hole 1711. The first groove 1712 is communicated with the valve port 150.

[0077] In the above constant flow throttling unloading multi-functional valve 10, when the water pressure at the water inlet 110 increases and there is a pressure difference between the first space 131 and the second space 132, the water flow passes through the water inlet 110 and enters the second slot hole 1711, and then flows from the second slot hole 1711 into the first groove 1712. A part of the water flows through the first groove 1712 between the valve stem 320 and the second slot hole 1711 to push the valve stem 320 to move towards the second space 132, and another part of the water flows through the first groove 1712 into the large hole of the first stepped hole 171 to push the partition plate 310 towards the second space 132. Through these two parts of actions, the first spool 300 can be pushed to move more conveniently and quickly, so that the pressure balance between the first space 131 and the second space 132 can be quickly achieved, and then the pressure difference can be quickly and automatically adjusted to ensure a constant flow rate at the output end. When the water pressure at the input end connected to the water inlet decreases, or when the water pressure at the output end connected to the water outlet increases or decreases, the working principle is similar and will not be elaborated here.

[0078] For the convenience of water flow through, as Figure 1 、 Figure 2 and Figure 3 shown, more specifically, the valve stem 320 includes a first rod portion 321, a second rod portion 322 and a third rod portion 323. The first rod portion 321, the second rod portion 322 and the third rod portion 323 protrude from the partition plate 310 in sequence. Along the direction perpendicular to the axis of the large hole of the first stepped hole 171, the cross-sectional areas of the first rod portion 321 and the third rod portion 323 are the same, and the cross-sectional areas of the first rod portion 321 and the third rod portion 323 are the same as that of the second slot hole 1711. The cross-sectional area of the second rod portion 322 is smaller than that of the first rod portion 321 to facilitate the passage of water flow and the movement of the valve stem 320.

[0079] The first spool 300 further includes a third slot 330. The third slot 330 opens at the end face of the partition plate 310 facing away from the valve stem 320, and the third slot 330 extends into the interior of the first rod portion 321 by a certain depth. A first connection hole 210 communicating the third slot 330 and the second channel 140 is formed inside the first elastic member 200. When specifically arranged, the first elastic member 200 can be a spring, and the helical structure of the spring forms the first connection hole 210. The first elastic member 200 can also be an elastic column, and the elastic column is formed with the first connection hole 210.

[0080] The first spool 300 further includes a second stepped hole 340. The large hole of the second stepped hole 340 opens at the end face of the third rod portion 323 away from the second rod portion 322, and the small hole of the second stepped hole 340 extends to one end of the second rod portion 322 close to the first rod portion 321.

[0081] In the above constant flow throttling unloading multi-functional valve 10, the third slot 330 and the second stepped hole 340 reduce the weight of the first spool 300, so that the free length of the first elastic member 200 is larger. At the same time, water flows through the first connection hole 210 of the first elastic member 200 into the third slot 330, filling the third slot 330 with water. When the water flows through the first groove 1712 to between the third rod portion 323 and the second slot 1711, it enters the second stepped hole 340, filling the second stepped hole 340 with water, further increasing the free length of the first elastic member 200, making the pressure difference obtained by the formula more accurate, and further making the flow rate at the valve port 150 closer to being constant, improving the accuracy of pressure regulation. And it can more conveniently and quickly push the first spool 300 to move, quickly adjust the pressure difference, and improve the reaction sensitivity.

[0082] To ensure the sealing performance, in a preferred embodiment, as Figure 3 and Figure 4 shown, the first side cover end 191 has a third stepped hole 1911. The large hole of the third stepped hole 1911 opens at the end face of the first side cover end 191. The third stepped hole 1911 has a third step surface 1912, which is parallel to the end face of the first side cover end 191. The second seal 800 is arranged on the third step surface 1912. When the rotating side cover 190 or the plug-in side cover 190 is inserted to the unloading port 160 and abuts against the second seal 800, the first side cover end 191 and the unloading port 160 are locked and connected. At this time, the second spool 400 just abuts against the unloading port 160, which is used to limit the assembly position of the side cover 190 relative to the unloading port 160 on the one hand, and to seal the gap between the outer wall of the large hole of the third stepped hole 1911 and the outer wall of the unloading port 160 on the other hand.

[0083] To achieve locking connection, in a preferred embodiment, internal threads are provided on the large hole wall of the third stepped hole 1911, and external threads are provided on the outer wall of the unloading port 160, and the external threads match the internal threads. The first side cover end 191 is sleeved on the outside of the unloading port 160, and the side cover 190 is rotated to connect the internal threads and the external threads. After the second valve core 400 is abutted against the unloading port 160, the constant flow throttling unloading multi-purpose valve 10 can be conveniently and quickly locked to the unloading port 160 as a whole, and the overall volume of the constant flow throttling unloading multi-purpose valve 10 after being connected to the constant flow throttling unloading multi-purpose valve 10 is small.

[0084] To ensure the elastic abutment of the second valve core 400, in a preferred embodiment, as Figure 3 and Figure 4 shown, the constant flow throttling unloading multi-purpose valve 10 further includes a second elastic member 101. The second side cover end 192 has a fourth stepped hole 1913. The large hole of the fourth stepped hole 1913 opens at the third step surface 1912. The small hole of the fourth stepped hole 1913 extends to the end surface of the second side cover end 192. The fourth stepped hole 1913 has a fourth step surface 1914, and the fourth step surface 1914 is parallel to the end surface of the first side cover end 191. The second elastic member 101 is located in the large hole of the fourth stepped hole 1913, and one end of the second elastic member 101 is fixed on the fourth step surface 1914, and the other end moves freely and is fixed with the second valve core 400. The elastic direction of the second elastic member 101 is parallel to the axis of the unloading port 160 to elastically abut the second valve core 400 against the unloading port 160. A second connection hole 1011 communicating with the side cover 190 is formed inside the second elastic member 101, so that water can flow from the unloading port 160 into the side cover 190, flow through the second elastic member 101 through the second connection hole 1011, then enter the side cover 190 again, and be discharged through the second side cover end 192. When specifically arranged, the second elastic member 101 can be a spring, and the spiral structure of the spring forms the second connection hole 1011. The second elastic member 101 can be an elastic column, and the elastic column is formed with the second connection hole 1011.

[0085] To further reduce the overall volume, as Figure 1 、 Figure 3 and Figure 4As shown, in a preferred embodiment, the end of the unloading port 160 has a fifth stepped hole 161. The large hole of the fifth stepped hole 161 opens to the end face of the unloading port 160. The second valve core 400 has a small end 410 and a large end 420 along the axis direction of the unloading port 160. The opening area of the small hole of the fifth stepped hole 161 is larger than the cross-sectional area of the small end 410, and the opening area of the small hole of the fifth stepped hole 161 is smaller than the cross-sectional area of the large end 420. So that when assembling, the second valve core 400 can enter the large hole of the fifth stepped hole 161, and the small end 410 of the second valve core 400 enters the small hole of the fifth stepped hole 161; the large end 420 of the second valve core 400 is located in the large hole of the fifth stepped hole 161, and the small end 410 of the second valve core 400 can abut against the small hole of the fifth stepped hole 161 to realize the closing of the unloading port 160. And when the water pressure of the unloading port 160 is greater than the elastic force of the second elastic member 101, the small end 410 of the second valve core 400 can conveniently withdraw from the small hole of the fifth stepped hole 161 to facilitate and quickly unload.

[0086] To ensure the sealing performance, in a preferred embodiment, as Figure 3 and Figure 4 shown, the third sealing member 900 can be made of soft rubber and integrally formed with the third valve core 600. One end of the third sealing member 900 is fixed between the bottom cover 182 and the cavity 170. When the bottom cover 182 and the cavity 170 are fixed, the bottom cover 182 and the cavity 170 jointly squeeze the end of the third sealing member 900. The third sealing member 900 bends and extends to form a groove 910, and the other end of the third sealing member 900 is integrally formed with the third valve core 600. On the one hand, the third sealing member 900 seals the cavity 170 and the bottom cover 182, and the cavity 170 and the third valve core 600 to prevent water from overflowing. At the same time, when the third valve core 600 moves, the second sealing section 320 deforms, so that the third sealing member 900 and the third valve core 600 move together to ensure the stability and airtightness during the moving process.

[0087] To ensure the elastic abutment of the third valve core 600, the constant flow throttling unloading multi-purpose valve 10 further includes a third elastic member 102. The third elastic member 102 is arranged inside the second channel 140, and the third elastic member 102 can abut against the surface of the third valve core 600 opposite to the top cover 181. When the feed rod 500 drives the third valve core 600 to move into the valve body 100, the third elastic member 102 is compressed. When the feed rod 500 moves out of the valve body 100, the third valve core 600 moves along with the feed rod 500 under the push of the third elastic member 102. Specifically, the third elastic member 102 can be a spring, and the third elastic member 102 can also be a columnar elastic structure.

[0088] To facilitate the control of the switch of the above-mentioned constant flow throttling unloading multi-purpose valve 10, asFigure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, in a preferred embodiment, the constant flow throttling unloading multi-purpose valve 10 further includes a switch module 103, the switch module 103 includes a housing 1031 and a drive unit 1032 and a top plug 1033 arranged in the housing 1031, wherein:

[0089] The water inlet 110 is connected to the first channel 130 through the valve hole 183;

[0090] The housing 1031 is fixed on the valve body 100, and the housing 1031 is connected to the water inlet 110; in a specific configuration, a sealing ring is provided between the housing 1031 and the valve body 100, and the housing 1031 and the valve body 100 are fixed as a whole by screws;

[0091] The driving unit 1032 is connected to the top plug 1033. The driving unit 1032 is used to drive the top plug 1033 to insert into and press against the valve hole 183. The driving unit 1032 is used to drive the top plug 1033 to leave the valve hole 183. In the specific setting, the driving unit 1032 and the top plug 1033 are provided with an elastic structure 1034 for realizing the recovery of the top plug 1033.

[0092] In the above-mentioned constant flow throttling unloading multi-purpose valve 10, water flow enters into the water inlet 110, when the driving unit 1032 drives the top plug 1033 to be inserted and the valve hole 183 is pressed against by the elastic structure 1034, the waterway is not conductive, and the water flow stays in the water inlet 110, the driving unit 1032 moves and drives the top plug 1033 to move out from the valve hole 183, so that the top plug 1033 is away from the valve hole 183, and the valve hole 183 is opened, and the water flow in the water inlet 110 enters into the first channel 130 through the valve hole 183, so that the water inlet 110 and the first channel 130 are communicated, therefore, by setting the above-mentioned switch module 103, the switch of the constant flow throttling unloading multi-purpose valve 10 can be controlled more conveniently. Specifically, the driving unit 1032 can be a solenoid valve, so as to be automatically controlled. Of course, the driving switch is not limited to the above-mentioned solenoid valve, and can also be a manual switch or a motor control switch.

[0093] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0094] The above-described embodiments merely represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A constant-current throttling unloading multi-functional valve, characterized in that, Comprising: A valve body having a water inlet, a water outlet, a relief port, a first channel, a second channel and a valve port, the second channel communicating with the valve port, the water outlet and the relief port; the valve body includes a cavity and a top cover, the cavity and the top cover are fixedly connected, and a first sealing member is provided therebetween, the cavity forms the water inlet, the water outlet and the relief port, a valve port, a first stepped hole, a first slot hole and a first through hole communicating the first slot hole and the first stepped hole are formed inside the cavity, the large hole of the first stepped hole and the first slot hole respectively open on the surface of the cavity facing the top cover, the small hole of the first stepped hole is connected to the valve port and the water inlet, the axis of the first slot hole is parallel to the axis of the first stepped hole, and communicates with the valve port, the water outlet and the relief port, the small hole of the first stepped hole includes a second slot hole and a first groove, the second slot hole is coaxial with the large hole of the first stepped hole and communicates with the water inlet, the first groove opens on the hole wall of the second slot hole and extends from the bottom of the large hole of the first stepped hole to the bottom of the second slot hole, and the first groove communicates with the valve port; A first valve core disposed in the first channel, one end spaced from the hole wall of the first channel, the other end slidingly and sealingly engaging with the hole wall of the first channel and dividing the first channel into a first space and a second space communicating with the second channel, the first space communicating with the water inlet and the valve port; the first valve core includes a partition plate and a valve stem protruding from the partition plate, wherein: the partition plate is slidably embedded in the large hole of the first stepped hole, and in a direction perpendicular to the axis of the large hole of the first stepped hole, the cross-sectional area of the partition plate is not less than the area of the large hole of the first stepped hole; the valve stem is inserted into the small hole of the first stepped hole, and in a direction perpendicular to the axis of the large hole of the first stepped hole, the cross-sectional area of the valve stem is less than the area of the small hole of the first stepped hole; A first elastic member disposed in the second space, abutting against the valve body and the first valve core; A second valve core disposed in the valve body and elastically abutting against the relief port, moving away from the relief port when the water pressure is greater than a set value; A feed rod threadedly connected to the valve body; A third valve core, one end elastically abutting in the second channel, the other end abutting against the feed rod, for moving under the push of the feed rod to adjust the water inlet cross-sectional area of the valve port.

2. The constant flow throttle unloading multi-functional valve according to claim 1, characterized in that, The valve body further includes a bottom cover and a side cover, wherein: The side cover has a first end and a second end along the axis of the relief port, the first end is sealingly sleeved and locked to the relief port, and the second valve core is elastically connected inside the second end; The bottom cover is sealingly fixed to the end face of the cavity, and is provided with a first threaded hole penetrating through its thickness and coaxial with the first slot hole, and the first threaded hole is threadedly connected to the feed rod.

3. The constant flow throttling unloading multi-functional valve according to claim 2, characterized in that, The valve stem includes a first rod portion, a second rod portion and a third rod portion protruding from the partition plate in sequence, wherein: In a direction perpendicular to the axis of the large hole of the first stepped hole, the cross-sectional areas of the first rod portion and the third rod portion are the same and are the same as the cross-sectional area of the second slot hole, and the cross-sectional area of the second rod portion is smaller than the cross-sectional area of the first rod portion; The first valve core further includes a third slot hole, the third slot hole opens at the end surface of the partition plate facing away from the valve rod and extends a certain depth into the interior of the first rod portion, and a first connection hole communicating the third slot hole and the second channel is formed inside the first elastic member; The first valve core further includes a second stepped hole, the large hole of the second stepped hole opens at the end surface of the third rod portion away from the second rod portion, and the small hole of the second stepped hole extends to one end of the second rod portion close to the first rod portion.

4. The constant-current throttling unloading multi-purpose valve according to claim 2, characterized in that, It further includes a second seal, the first end has a third stepped hole, the large hole of the third stepped hole opens at the end surface of the first end, the third stepped hole has a third step surface parallel to the end surface of the first end, and the second seal is arranged on the third step surface; a first internal thread is provided on the inner wall of the large hole of the third stepped hole, and a first external thread matching the first internal thread is provided on the outer wall of the unloading port.

5. The constant flow throttle unloading multi-purpose valve according to claim 4, characterized in that, It further includes a second elastic member, the second end has a fourth stepped hole, the large hole of the fourth stepped hole opens at the third step surface, the small hole of the fourth stepped hole extends to the end surface of the second end, the fourth stepped hole has a fourth step surface parallel to the end surface of the first end, the second elastic member is located in the large hole of the fourth stepped hole, and one end is fixed on the fourth step surface and the other end is fixedly connected to the second valve core, and the elastic direction is parallel to the axis of the unloading port, and a second connection hole communicating with the side cover is formed inside the second elastic member.

6. The constant flow throttling unloading multi-purpose valve according to claim 2, characterized in that, It further includes a third seal, one end of the third seal is located between the bottom cover and the cavity, and when the bottom cover is fixed on the cavity, the bottom cover and the cavity jointly squeeze the third seal; the third seal is bent and extended to form a groove, and the other end is integrally formed with the third valve core.

7. The constant flow throttling unloading multi-functional valve according to claim 2, characterized in that, It further includes a third elastic member, the third elastic member is arranged in the second channel and abuts against the opposite surfaces of the third valve core and the top cover.

8. The constant-current throttling unloading multi-purpose valve according to claim 1, characterized in that, The end of the unloading port has a fifth stepped hole, the large hole of the fifth stepped hole opens at the end surface of the unloading port, the valve core has a small end and a large end along the axis direction of the unloading port, and the opening area of the small hole of the fifth stepped hole is larger than the cross-sectional area of the small end and smaller than the cross-sectional area of the large end.

9. The constant flow throttling unloading multi-functional valve according to claim 1, characterized in that, It further includes a switch module, the switch module includes a housing and a driving unit and a top plug arranged in the housing, wherein: The water inlet is communicated with the first channel through a valve hole; The housing is fixed on the valve body and is communicated with the water inlet; The driving unit is connected to the top plug and is used to drive the top plug to insert into and tightly press the valve hole or leave the valve hole.

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