Fluid valve and fluid supply device

Abstract

The fluid valve comprises a valve body and a valve element, the valve body is provided with a valve port, an inlet cavity and an outlet cavity, and the inlet cavity and the outlet cavity are located on the two sides of the valve port; the valve element is movably arranged on the valve body to be matched with the valve port, and the opening pressure difference of the valve element is a first pressure difference formed by the fluid pressure intensity of the inlet cavity relative to the fluid pressure intensity of the outlet cavity; the valve further comprises a valve channel, the two ends of the valve channel are communicated with the inlet cavity and the outlet cavity respectively, the valve channel is provided with a movable valve, and the opening pressure difference of the valve is a second pressure difference formed by the fluid pressure intensity of the inlet cavity relative to the fluid pressure intensity of the outlet cavity. The first pressure difference is greater than the second pressure difference. The fluid valve can effectively solve the problem that the liquid inlet effect of the liquid inlet side of the fluid valve is poor. The invention further discloses a fluid supply device of the fluid valve.

Description

Technical Field

[0001] The present invention relates to the field of fluid structures, and more specifically, to a fluid valve, and also to a fluid supply device comprising the fluid valve. Background Art

[0002] In practical applications, one-way valves are often used as devices that only allow the liquid medium in the system pipeline to flow in one direction, that is, to prevent the liquid from flowing back. When a water pump is designed in the pipeline system, when the liquid medium in the system pipeline flows back violently, if the water pump is in working state, the water pump is very susceptible to the impact damage caused by the violent backflow, which is extremely unfriendly to the service life of the water pump. Therefore, it is very important to install a one-way valve at the outlet of the water pump medium to prevent the water pump from being impacted by the backflow of the pipeline system medium.

[0003] When a conventional one-way valve is connected to the outlet of the water pump, if the water pump stops running, the one-way valve is closed at this time. Due to the closure of the one-way valve, sufficient liquid medium can be retained on the outlet side of the water pump. Due to the influence of gravity, the liquid on the medium inlet side of the water pump medium inlet and the one-way valve medium inlet side gradually loses until the water pump medium inlet and the one-way valve medium inlet side are empty and liquid-free. When the water pump is started next time, since the water pump medium inlet and the one-way valve medium inlet side are in an empty and liquid-free state, and a large amount of liquid medium is still retained on the water pump medium outlet side due to the closure of the one-way valve, at this time, there is a huge liquid pressure difference and air pressure difference between the water pump medium inlet and the one-way valve medium inlet and the one-way valve medium outlet, and the liquid medium cannot smoothly flow from the water pump medium inlet to the one-way valve and flow out from the one-way valve medium outlet. After the water pump is started, it is very easy for the water pump to run, but the liquid in the pipeline system and the flow meter is not flowing, and the system control unit alarms to indicate the fault.

[0004] In the process of realizing the invention, the inventors found that there are at least the following problems in the prior art: some current solutions still have some characteristics such as high cost and complex structure, so there is still the problem of poor liquid filling effect of the valve body in the early stage of operation. Summary of the invention

[0005] In view of this, the first object of the present invention is to provide a fluid valve which can effectively solve the problem of difficulty in liquid intake on the liquid inlet side of the fluid valve. The second object of the present invention is to provide a fluid supply device for the above-mentioned fluid valve.

[0006] In order to achieve the above first object, the present invention provides the following technical solutions:

[0007] A fluid valve comprises: a valve body and a valve core, the valve body having a valve port and an inlet cavity and an outlet cavity located on both sides of the valve port; the valve core is movably arranged on the valve body to cooperate with the valve port, and the opening pressure difference of the valve core is the fluid pressure of the inlet cavity relative to the fluid pressure of the outlet cavity to form a first pressure difference; it also comprises a valve channel, the two ends of the valve channel are respectively connected to the inlet cavity and the outlet cavity, the valve channel is provided with a movable valve, and the opening pressure difference of the valve is the fluid pressure of the inlet cavity relative to the fluid pressure of the outlet cavity to form a second pressure difference; the first pressure difference is greater than the second pressure difference.

[0008] When in use, the inlet chamber is connected to the outlet of the driving pump, a valve channel is provided between the inlet chamber and the outlet chamber, and a valve is provided accordingly, and the opening pressure difference of the valve is smaller than the opening pressure difference of the valve core, so that when there is gas in the inlet chamber, as the driving pump is turned on, the gas pressure gradually increases, and the valve can be opened first, and the gas can flow directly to the outlet chamber through the valve channel, so that the resistance to fluid entry becomes smaller. In addition, the valve channel and the valve are provided separately. Since the valve channel does not participate in the main flow work, the flow area is not required, and the opening resistance can be greatly reduced, so a valve with a smaller opening pressure difference can be provided. This allows the effect of exhausting air first to be achieved, so as to reduce the difficulty of liquid filling into the chamber. In summary, the fluid valve can effectively solve the problem of poor liquid filling effect on the liquid inlet side of the fluid valve.

[0009] In some technical solutions, an elastic device for preventing the valve core from opening is also included, and the valve is freely placed in the valve channel.

[0010] In some technical solutions, an axial hole is formed on the valve core to serve as the valve channel.

[0011] In some technical solutions, the valve channel is provided with a blocking edge for abutting against the valve to block the valve channel to form the one-way valve structure.

[0012] In some technical solutions, the valve is a sphere.

[0013] In some technical solutions, the valve channel is provided with a first channel section and a second channel section in sequence along the diversion direction, the diameter of the first channel section is smaller than the diameter of the second channel section to form the annular blocking edge.

[0014] The valve has a diameter greater than that of the first channel section and smaller than that of the second channel section. The valve is located in the second channel section and can move along the second channel section. When the valve is separated from the blocking edge, the first channel section and the second channel section are connected.

[0015] A latch is provided on the side of the valve away from the first channel section so as to prevent the valve from continuing to move when the valve moves away from the blocking edge by a preset distance; the latch is plugged into the second channel section.

[0016] In some technical solutions, the elastic device is sleeved on the valve stem of the valve core, one side of the valve disc of the valve core is used to abut against the elastic device, and the other side of the valve disc is used to abut against the edge of the valve port of the valve body; the valve disc includes a stacked disc body and a sealing disc, the sealing disc is located between the edge of the valve port and the disc body, and the disc body and the valve stem are integrally formed; a slot is formed between the disc body and the head of the valve stem, and the inner edge of the sealing disc is inserted into the slot;

[0017] In some technical solutions, the valve body has a support plate to slide with the valve stem to guide the movement of the valve core, and the support plate has a hole for fluid flow; the elastic device is a compression spring, and one end is against the valve plate and the other end is against the support plate.

[0018] In some technical schemes, the valve body includes a first valve body and a second valve body, the first valve body has the valve mouth edge inside, and the second valve body has the support plate; the first valve body forms an insertion hole for the valve core on the side facing the second valve body; the second valve body is sleeved on the first valve body and the two are connected by a thread, and the axis of the thread is coaxially arranged with the axis of the valve core.

[0019] In order to achieve the above second object, the present invention further provides a fluid supply device, which includes any of the above fluid valves and a driving pump, wherein the fluid valve is arranged at the pump outlet of the driving pump, and the inlet cavity of the fluid valve is connected to the pump outlet. Since the above fluid valve has the above technical effects, the fluid supply device having the fluid valve should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of a fluid valve provided by an embodiment of the present invention;

[0022] Figure 2 A schematic structural diagram of another fluid valve provided in an embodiment of the present invention.

[0023] The following are marked in the accompanying drawings:

[0024] The first connecting part 1, the first valve body 2, the sealing ring 3, the sealing disk 4, the disk body 5, the second valve body 6, the elastic device 7, the valve 8, the latch 9, the limit pin 10, the second connecting part 11, the valve channel 12, the valve stem 13, the valve port 14, the support disk 15, the inlet cavity 16, and the outlet cavity 17. DETAILED DESCRIPTION

[0025] The embodiment of the present invention discloses a fluid valve, which can effectively solve the problem of difficulty in liquid inletting at the liquid inlet side of the fluid valve.

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 2 , Figure 1 A schematic diagram of the structure of a fluid valve provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of another fluid valve provided in an embodiment of the present invention.

[0028] In some embodiments, a fluid valve is provided, specifically, the fluid valve comprises a valve body and a valve core. In some embodiments, because the valve channel 12 exists to balance the pressure, the fluid valve can also be called a one-way valve for balancing the pipeline fluid pressure.

[0029] A valve port 14 is formed on the valve body, wherein an inlet cavity 16 and an outlet cavity 17 are formed on both sides of the valve port 14, respectively, wherein the valve core is movably arranged on the valve body, so as to be able to move to a blocking position to block the valve port 14, and to move to an open position to open the valve port 14 (to open the valve port 14). When the valve core moves to the open position, it is considered that the valve core is open. For a fluid valve, when the fluid in the inlet cavity 16 enters the outlet cavity 17, it is called downstream, and when the fluid in the outlet cavity 17 enters the inlet cavity 16, it is called upstream.

[0030] When the valve port 14 is blocked, the valve port 14 may be in a completely closed state, or the opening of the valve port 14 is significantly reduced compared to the opening of the valve port 14, at which time the fluid is throttled or cannot flow. Specifically, the valve core: can move to a blocked position relative to the valve body, move to block the valve port 14, that is, block at the valve port 14 position to limit the flow of fluid, at which time the valve core can abut against the valve body to avoid excessive movement, so as to maintain the current position; it can also move to an open position relative to the valve body, open the valve port 14, at which time it can be the exit valve port 14 position, or the gap between the valve port 14 and the valve port 14 can be significantly increased to allow the fluid to flow, so as to flow from the inlet chamber 16 to the outlet chamber 17, and the flow cross-sectional area reaches the preset required area, that is, the opening requirement of the valve port 14 is met. The flow area when the valve port 14 is open is generally related to the design value of the fluid valve, such as meeting the flow requirement of the fluid valve when the drive pump is turned on.

[0031] The specific description is as follows: when the valve port 14 is open, the flow cross-sectional area is generally set according to the preset requirements, and is generally equal to the flow cross-sectional area of ​​the fluid valve inlet interface to meet the flow requirements of the downstream fluid (flowing in the direction allowed by the one-way valve). At this time, the valve core can be withdrawn from the valve port 14, or other parts with smaller cross-sectional areas can be replaced at the valve port 14, so that the valve port 14 is in an open state. When the valve port 14 is blocked: at this time, the valve port 14 can be completely closed to prevent any fluid from passing through the valve port 14; or it can be left with a small gap, that is, in a non-fully closed state, at this time, the flow rate of the valve port 14 will be significantly reduced, that is, the flow cross-sectional area (that is, the area of ​​the flow cross-section) will be significantly reduced. The flow cross-sectional area refers to the cross-sectional area perpendicular to the flow direction of the fluid. When describing the flow cross-sectional area of ​​a certain structure or a certain part, the smallest flow cross-sectional area here is generally used as the flow cross-sectional area at that place.

[0032] For the valve core or the subsequent valve 8, it is generally necessary for the fluid pressure of the inlet chamber 16 to form a certain pressure difference relative to the fluid pressure of the outlet chamber 17, so as to form a pressure difference on both sides of the valve 8 or the valve core to overcome the resistance. When there is an elastic device 7, it is also necessary to overcome the elastic force of the elastic device 7, and then the valve core or valve 8 will move. The minimum pressure difference to open the valve core or valve 8 is the opening pressure difference. Generally, when it is not less than the opening pressure difference, the valve core or valve 8 moves to the open position or remains in the open position; and when it is less than the opening pressure difference, the valve core or valve 8 moves to the blocking position or remains in the blocking position. For the valve 8 and the valve core, the opening pressure difference can be adjusted by adjusting the pressure difference of the pressure-bearing surfaces on both sides. Of course, the addition of the elastic device 7 or some other resistance structures will also affect the opening pressure difference. The fluid pressure of the inlet chamber 16 forms a first pressure difference relative to the fluid pressure of the outlet chamber 17, that is, the fluid pressure of the inlet chamber 16 minus the fluid pressure of the outlet chamber 17 reaches the first pressure difference. The opening pressure difference of the valve core is the first pressure difference formed by the fluid pressure of the inlet chamber 16 relative to the fluid pressure of the outlet chamber 17 .

[0033] A movable valve 8 is arranged in the valve channel 12, so that the valve channel 12 cooperates with the valve 8 to form a one-way valve structure. The two ends of the valve channel 12 are respectively connected to the inlet chamber 16 and the outlet chamber 17. When in use, after the high-pressure fluid enters the inlet chamber 16, the fluid pressure in the inlet chamber 16 is higher than the fluid pressure in the outlet chamber 17, so as to push the valve 8 to open. As mentioned above, the opening pressure difference of the valve 8 is the fluid pressure of the inlet chamber 16 relative to the fluid pressure of the outlet chamber 17 to form a second pressure difference, that is, when the difference between the fluid pressure of the inlet chamber 16 and the fluid pressure of the outlet chamber 17 reaches the second pressure difference, the fluid in the inlet chamber 16 can push the valve 8 to open. It should be noted that the second pressure difference here can be a negative value, but it is generally a positive value. The above-mentioned first pressure difference is a positive value. Similarly, the valve core and the valve body can also constitute a one-way valve structure.

[0034] The first pressure difference is greater than the second pressure difference, so that when the fluid pressure of the inlet chamber 16 gradually increases, the valve 8 opens first and the valve core opens later, that is, the difficulty of opening the valve 8 is lower than the difficulty of opening the valve core, so that when exhausting, the valve 8 is easy to open first and exhaust the gas. At the same time, it can be known from the above that the greater the difference between the first pressure difference and the second pressure difference, the better the opening effect of the valve 8 under the action of the downstream fluid.

[0035] When in use: In the first state: when the fluid pressure in the inlet chamber 16 is less than the second pressure difference compared to the fluid pressure in the outlet chamber 17, since the opening pressure difference of the valve 8 and the opening pressure difference of the valve core are not reached, the valve 8 and the valve core are both in the closed state. In the second state: when the fluid pressure in the inlet chamber 16 reaches the second pressure difference compared to the fluid pressure in the outlet chamber 17, the opening pressure difference of the valve 8 is reached, but the opening pressure difference of the valve core is not reached, so the valve 8 is opened, and the valve core remains closed. And when the fluid pressure in the inlet chamber 16 is not less than the second pressure difference compared to the fluid pressure in the outlet chamber 17, and is not greater than the first pressure difference, the valve 8 is opened, and the valve core remains closed. In the second state, the fluid valve is not considered to be open at this time, that is, the flow area at this time cannot meet the flow requirements, but it is an exhaust state at this time. In the third state, when the fluid pressure of the inlet chamber 16 is not less than the second pressure difference compared with the fluid pressure of the outlet chamber 17, the valve 8 generally remains in the open state, and the valve core also enters the open state. At this time, it is considered that the fluid valve is open to meet the flow requirement.

[0036] In some embodiments, generally speaking, the flow area of ​​the valve channel 12 after the valve 8 is opened is smaller than the flow area of ​​the valve port 14 after the valve core is opened, so that the resistance to the opening of the valve 8 can be well reduced, and the second pressure difference can be made small enough, so that the valve 8 can be opened more easily, making it easier to exhaust gas.

[0037] In some embodiments, it can be understood that in the above-mentioned fluid valve, compared with the previous one-way valve, an additional one-way valve with a smaller opening pressure difference is provided. A separate one-way valve with a smaller opening pressure difference is provided so that when the fluid pressure of the inlet chamber 16 is not sufficient to reach the first pressure difference relative to the fluid pressure of the outlet chamber 17, the valve 8 of the one-way valve added later can be opened first to connect the inlet chamber 16 and the outlet chamber 17 so that the gas in the inlet chamber 16 can be discharged.

[0038] In some embodiments, when in use, the inlet chamber 16 is connected to the outlet of the driving pump, a valve channel 12 is provided between the inlet chamber 16 and the outlet chamber 17, and a valve 8 is provided correspondingly, and the opening pressure difference of the valve 8 is smaller than the opening pressure difference of the valve core, so that when there is gas in the inlet chamber 16, as the driving pump is turned on, the gas pressure gradually increases, and the valve 8 can be opened first, and the gas can flow directly to the outlet chamber 17 through the valve channel 12, so that the fluid entry resistance becomes smaller. In addition, the valve channel 12 and the valve 8 are provided separately. Since the valve channel 12 does not participate in the main flow work, the flow area is not required, and the opening resistance can be well reduced, so a valve 8 with a smaller opening pressure difference can be provided. This allows the effect of exhausting air first to reduce the difficulty of liquid entry into the inlet chamber 16. In summary, the fluid valve can effectively solve the problem of poor liquid entry effect on the liquid inlet side of the fluid valve.

[0039] In some embodiments, in order to stabilize the position of the valve core and prevent it from shaking and opening easily, an elastic device 7 is generally included to prevent the valve core from opening. This makes it so that when in use, the valve core is subjected to the pressure of the fluid in the inlet chamber 16, and it must not only overcome the pressure of the fluid in the outlet chamber 17, but also overcome the elastic force of the elastic device 7, so that the valve core can be opened. Therefore, the greater the pre-tightening pressure of the elastic device 7, the greater the opening pressure difference of the valve core.

[0040] The valve 8 is freely placed in the valve channel 12 without being constrained by elastic parts, so that the resistance to the movement of the valve 8 is as small as possible. However, considering that in actual applications, the inlet chamber 16 is generally at the bottom and the outlet chamber 17 is at the top, when the valve 8 needs to be pushed open, the gravity of the valve 8 needs to be overcome. At this time, the second pressure difference should be a positive value, and its size is related to the gravity of the valve 8. The smaller the flow area of ​​the valve channel, the smaller the volume of the valve 8, and the smaller the second pressure difference, the better the exhaust effect. The valve channel needs to be further determined according to requirements such as processing accuracy and exhaust speed, but is not limited by the flow requirements. Specifically, the flow area when the valve channel is opened can be less than one-fifth of the flow area when the valve port is opened, such as one-tenth of the flow area when the valve port is opened.

[0041] In some embodiments, the valve channel 12 may be formed on the valve body, on the valve core, or between the valve 8 and the valve core. There may be one valve channel 12, or multiple valve channels 12. When multiple valve channels 12 are provided, each corresponding valve channel 12 is provided with a valve 8.

[0042] In some embodiments, for convenience of arrangement, an axial hole may be formed on the valve core to serve as the valve channel 12. In this case, the valve channel 12 and the valve core are coaxially arranged.

[0043] In some embodiments, the valve channel 12 may be provided with a blocking edge for contacting with the valve 8 to block the valve channel 12, so as to form the one-way valve structure, so that when the valve 8 is subjected to the pressure of the reverse fluid, it can move to contact with the blocking edge, so that when the pressure of the reverse fluid is relatively large, the valve channel 12 is blocked. When in use, when there is gas on the liquid inlet side, under the action of the driving pump or other power, the gas pressure increases, and the valve 8 will be pushed to move away from the blocking edge first, so that the valve 8 is opened, and the gas is gradually discharged, so as to avoid the continuous increase of the gas pressure, so that the subsequent liquid flows in the direction until the gas is completely discharged.

[0044] In some embodiments, the valve channel 12 may be provided with a first channel section and a second channel section in sequence along the flow direction (the direction of fluid flow in the inlet chamber 16), wherein the diameter of the first channel section is smaller than the diameter of the second channel section to form the annular blocking edge. Therefore, during installation, the valve 8 only needs to be placed in the second channel section.

[0045] Furthermore, the valve 8 can be made into a sphere, which is easier to achieve the blocking effect than a square valve, so that the valve 8 can easily abut against the blocking edge even if it rotates. The diameter of the valve 8 is larger than the diameter of the first channel section and smaller than the diameter of the second channel section, so that it can abut against the blocking edge formed between the two, and after being separated from the blocking edge, a gap is formed between the valve 8 and the second channel section to serve as the actual flow cross-section of the valve channel 12. At the same time, the above-mentioned arrangement is conducive to reducing the flow cross-sectional area. The valve 8 is located in the second channel section and can move along the second channel section, and when it is separated from the blocking edge, the first channel section and the second channel section are connected.

[0046] Furthermore, a latch 9 may be provided on the side of the valve 8 away from the first channel section, so as to prevent the valve 8 from continuing to move when the valve 8 moves away from the blocking edge by a preset distance. The latch 9 is plugged into the second channel section. When the valve 8 is inserted, the latch 9 is removed, and the valve 8 is inserted into the second channel section from the end of the second channel section away from the first channel section, and then the latch 9 is inserted to trap the valve 8. At the same time, a limit pin 10 is inserted into the latch 9 to prevent the latch 9 from being disengaged.

[0047] In some embodiments, the elastic device 7 can be sleeved on the valve stem 13 of the valve core, wherein one side of the valve disc of the valve core is used to abut against the elastic device 7, and the other side of the valve disc is used to abut against the edge of the valve port 14 of the valve body. The elastic device 7 can be a spring or other elastic body.

[0048] The valve body may further include a support plate 15 to slide with the valve stem 13 to guide the movement of the valve core, and the support plate 15 may have holes for fluid flow. The elastic device 7 is a compression elastic device 7, one end of which abuts against the valve disc and the other end of which abuts against the support plate 15. The support plate 15 may include an inner ring and support rods, the support rods are evenly arranged around the inner ring, and holes are formed between the support rods.

[0049] The valve disc includes a stacked disc body 5 and a sealing disc 4, wherein the sealing disc 4 is located between the edge of the valve port 14 and the disc body 5. The sealing disc 4 can also be called a sealing pad or a sealing ring, which is generally made of a soft material such as rubber or silicone. When the disc body 5 presses against the edge of the valve port 14, the sealing disc 4 is compressed to tightly fill the gap between the two to achieve a sealed connection. Figure 1 As shown, in order to better squeeze the sealing disk 4, the valve body can be formed with an inner shoulder with an inner protrusion, and the inner shoulder has a protrusion with a protrusion, and the width of the protrusion gradually decreases toward the sealing disk 4 to form a sharp point, so as to improve the sealing contact effect. Figure 2 As shown, the inner shoulder formed on the valve body can be formed into an inclined surface, and the inclined surface is continuously arranged in an annular direction to form a conical surface to ensure the connection effect with the sealing disk 4.

[0050] In some embodiments, the disc body 5 and the valve stem 13 can be integrally formed. A slot is formed between the disc body 5 and the head of the valve stem 13, and the inner edge of the sealing disc 4 can be inserted into the slot to better fix the sealing disc 4.

[0051] In some embodiments, in order to facilitate the installation of the valve core, the valve body can include a first valve body 2 and a second valve body 6, wherein the first valve body 2 has a valve port 14 edge inside, and the second valve body 6 has a support plate 15. The side of the first valve body 2 facing the second valve body 6 forms a loading hole for the valve core. The second valve body 6 is sleeved on the first valve body 2 and connected by a thread, and the axis of the thread is coaxially arranged with the axis of the valve core.

[0052] This allows the elastic device 7 to be sleeved on the valve stem 13 of the valve core during use, and then installed on the first valve body 2 through the installation hole of the first valve body 2, at which time the valve disc abuts against the edge of the valve port 14; then the second valve body 6 is installed, and at this time the valve stem 13 is inserted into the support plate 15 of the second valve body 6, the support plate 15 presses down on the elastic device 7, and at the same time the first valve body 2 and the second valve body 6 are threadedly connected, when the second valve body 6 rotates relative to the first valve body 2, the valve core may rotate with the second valve body 6, or may not rotate with the second valve body 6. As shown in the attached figure, the first valve body 2 is at the bottom and the second valve body 6 is at the top, so the first valve body 2 can be called the lower valve body, and the second valve body 6 can be called the upper valve body. For sealing, a sealing ring 3 is generally provided between the first valve body 2 and the second valve body 6.

[0053] For the convenience of external connection, the first valve body 2 is also provided with a first connection part 1, and the second valve body 6 is also provided with a second connection part 11. The first connection part 1 and the second connection part 11 are used as external connection parts, such as chucks. The first valve body 2 and the first connection part 1 are welded or threaded, and the second valve body 6 and the second connection part 11 are welded or threaded. The water pump is connected to the system pipeline through two chucks. The chuck connection is easy to install and disassemble, and the one-way valve can be quickly installed, quickly disassembled, replaced and maintained.

[0054] In some embodiments, the fluid valve may not be provided with the elastic device 7. When the elastic device 7 is not provided: when the fluid pressure entering the inlet chamber 16 is higher than the fluid pressure of the outlet chamber 17, the fluid in the inlet chamber 16 will push the valve core to move toward the open position, so that the valve port 14 is in the open state; and when the fluid pressure entering the inlet chamber 16 is lower than the fluid pressure of the outlet chamber 17, the fluid in the outlet chamber 17 will push the valve core to move toward the blocking position, so that the valve port 14 is blocked. The opening pressure difference of the valve core still needs to overcome the resistance of the valve core movement, and the resistance can be the friction resistance between the valve stem 13 and the support plate 15, or the gravity of the valve core.

[0055] Based on the fluid valve provided in the above embodiment, the present invention further provides a fluid supply device, which includes any one of the fluid valves in the above embodiment, including a driving pump, the fluid valve is arranged at the pump outlet of the driving pump, and the inlet cavity of the fluid valve is connected to the pump outlet. Since the fluid supply device adopts the fluid valve in the above embodiment, please refer to the above embodiment for the beneficial effects of the fluid supply device.

[0056] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0057] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fluid valve, comprising: A valve body and a valve core, wherein the valve body has a valve port (14) and an inlet cavity (16) and an outlet cavity (17) located on both sides of the valve port (14); the valve core is movably arranged on the valve body to cooperate with the valve port (14), and the opening pressure difference of the valve core is a first pressure difference formed by the fluid pressure of the inlet cavity (16) relative to the fluid pressure of the outlet cavity (17); it is characterized in that it also includes a valve channel (12), the two ends of the valve channel (12) are respectively connected to the inlet cavity (16) and the outlet cavity (17), the valve channel (12) is provided with a movable valve (8), and the opening pressure difference of the valve (8) is a second pressure difference formed by the fluid pressure of the inlet cavity (16) relative to the fluid pressure of the outlet cavity (17); the first pressure difference is greater than the second pressure difference.

2. The fluid valve according to claim 1, characterized in that: It also includes an elastic device (7) for preventing the valve core from opening, and the valve (8) is freely placed in the valve channel (12).

3. The fluid valve according to claim 2, characterized in that: An axial hole is formed on the valve core to serve as the valve channel (12).

4. The fluid valve according to claim 3, characterized in that: The valve channel (12) is provided with a blocking edge for abutting against the valve (8) to block the valve channel (12) to form a one-way valve structure.

5. The fluid valve according to claim 4, characterized in that: The valve (8) is a spherical body.

6. The fluid valve according to claim 5, characterized in that: The valve channel (12) is provided with a first channel section and a second channel section in sequence along the flow direction, the diameter of the first channel section being smaller than the diameter of the second channel section to form an annular blocking edge. The diameter of the valve (8) is larger than the diameter of the first channel section and smaller than the diameter of the second channel section. The valve (8) is located in the second channel section and can move along the second channel section. When the valve (8) is separated from the blocking edge, the first channel section and the second channel section are connected. A latch (9) is provided on a side of the valve (8) away from the first channel section so as to prevent the valve (8) from continuing to move when the valve (8) moves a preset distance away from the blocking edge; the latch (9) is plugged into the second channel section.

7. The fluid valve according to any one of claims 2 to 6, characterized in that: The elastic device (7) is sleeved on the valve stem (13) of the valve core; one side of the valve disc of the valve core is used to abut against the elastic device (7), and the other side of the valve disc is used to abut against the edge of the valve port (14) of the valve body; the valve disc comprises a stacked disc body (5) and a sealing disc (4); the sealing disc (4) is located between the edge of the valve port (14) and the disc body (5); the disc body (5) and the valve stem (13) are integrally formed; a slot is formed between the disc body (5) and the head of the valve stem (13), and the inner edge of the sealing disc (4) is inserted into the slot.

8. The fluid valve according to claim 7, characterized in that: The valve body has a support plate (15) in sliding cooperation with the valve stem (13) to guide the movement of the valve core, and the support plate (15) has a hole for fluid flow; the elastic device (7) is a compression spring, one end of which abuts against the valve plate, and the other end abuts against the support plate (15).

9. The fluid valve according to claim 8, characterized in that: The valve body comprises a first valve body (2) and a second valve body (6); the first valve body has a valve opening (14) edge inside, and the second valve body (6) has the support plate; a hole for inserting the valve core is formed on a side of the first valve body (2) facing the second valve body (6); the second valve body (6) is sleeved on the first valve body (2) and connected thereto by a thread, and the axis of the thread is coaxially arranged with the axis of the valve core.

10. A fluid supply device, comprising a drive pump, characterized in that: It also includes the fluid valve according to any one of claims 1 to 9, wherein the fluid valve is arranged at the pump outlet of the driving pump, and the inlet chamber of the fluid valve is connected to the pump outlet.

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