Fluid valve, fluid supply device, and valve body

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, can be located at an opening position to open the valve port when the fluid pressure intensity of the inlet cavity is higher than the fluid pressure intensity of the outlet cavity and is not lower than a preset pressure intensity difference, and can be located at a blocking position to block the valve port when the fluid pressure intensity of the inlet cavity is lower than the fluid pressure intensity of the outlet cavity. The check valve is characterized by further comprising a through channel, and when the valve element is located at the blocking position, channel openings in the two ends of the through channel can communicate with the inlet cavity and the outlet cavity in the two sides of the valve port correspondingly, so that the inlet cavity communicates with the outlet cavity. 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 and the valve element 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, a fluid supply device including the fluid valve, and a valve core applied to 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 flow smoothly 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] When the one-way valve is connected to the water pump outlet, the main function of the one-way valve is to protect the water pump from damage caused by the impact of violent backflow during operation. In this case, as long as a reasonable structure is designed, violent backflow in the pipeline system can be effectively avoided; at the same time, this structural form can also achieve the effect of balancing the fluid pressure in the pipeline, in order to ensure the normal operation of the water pump.

[0006] In view of this, the first object of the present invention is to provide a fluid valve, which can effectively solve the problem of poor liquid inlet effect 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. The third object of the present invention is to provide a valve core that can be applied to at least one of the above-mentioned fluid valves.

[0007] In order to achieve the above first object, the present invention provides the following technical solutions:

[0008] 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, and can be located in an open position to open the valve port when the fluid pressure in the inlet cavity is higher than the fluid pressure in the outlet cavity and not lower than a preset pressure difference, and can be located in a blocked position to block the valve port when the fluid pressure in the inlet cavity is lower than the fluid pressure in the outlet cavity; the through-channel is characterized in that it also comprises a through-channel, and when the valve core is located in the blocked position, the channel openings at both ends of the through-channel respectively connect the inlet cavity and the outlet cavity on both sides of the valve port, so that the inlet cavity is communicated with the outlet cavity.

[0009] When in use, the inlet cavity is used to connect the outlet of the liquid pump. When the liquid medium in the system pipeline flows back, the liquid pressure of the outlet cavity will be greater than the liquid pressure of the inlet cavity. The refluxed liquid medium will impact the valve core, and the valve core will be impacted by the reflux of the liquid medium, so that the valve core is in a blocked position to block the valve port. This means that the main channel of the one-way valve is closed. However, due to the existence of the through channel, only part of the liquid medium in the small channel flows back. Since the through channel is not the main channel, compared with the valve port being opened, part of the liquid medium flows back inside, which can no longer cause damage and influence to the operation of the water pump, or it can cause less damage and influence to the operation of the water pump. When the water pump stops running and the main channel is closed, due to the existence of the through channel, if the liquid in the inlet cavity gradually loses, the liquid medium on the outlet side of the one-way valve medium in the pipeline system will also slowly drip back into the water pump through the through channel. Although the phenomenon of liquid medium dripping back to the water pump in the one-way valve also belongs to liquid medium reflux, this kind of reflux belongs to slow dripping. Since the cross-sectional area of ​​the through-channel is very small, the dripping backflow speed is very slow. This backflow does not have much impact and will not cause significant damage to the water pump. The hydraulic pressure and air pressure on both sides of the fluid valve port are in a connected state, and the pressure is basically the same. After the water pump is running, the fluid valve port can be easily opened, and the hydraulic system can operate normally. In summary, because the through-channel can drain a small flow when the one-way valve core blocks the valve port to close, the fluid valve can effectively solve the problem of poor application effect of the current valve body.

[0010] In some technical solutions, the valve body and / or the valve core is provided with the through passage; the flow cross-sectional area of ​​the through passage is smaller than the flow cross-sectional area of ​​the valve port in an open state.

[0011] In some technical solutions, the flow cross-sectional area of ​​the through passage is not greater than one fifth of the flow cross-sectional area of ​​the valve port in an open state.

[0012] In some technical solutions, an axial hole is formed on the valve core to serve as the through passage; and / or a plurality of connecting passages evenly arranged around the axis of the valve core are provided on the valve body to serve as the through passage.

[0013] In some technical schemes, the valve core includes a valve stem and a valve disc, the edge of the valve disc can be abutted against the valve mouth of the valve body to achieve a sealing connection, the middle of the valve disc is connected to the valve stem, and a through hole is provided between the edge and the middle of the valve disc to serve as the through channel.

[0014] In some technical solutions, when the valve core moves to the blocking position, a gap is formed between the valve core and the valve body to serve as the through passage.

[0015] In some technical schemes, an elastic device is also included for preventing the valve core from moving from a blocking position to an open position, so that it can be deformed under pressure when the pressure of the fluid entering the inlet chamber is higher than the pressure of the fluid entering the outlet chamber and reaches an opening pressure difference, so that the valve core can move to the open position, and can push the valve core to move to a blocking position when the pressure of the fluid entering the inlet chamber is not higher than the pressure of the fluid entering the outlet chamber.

[0016] In some technical schemes, 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 valve mouth edge of the valve body; the valve disc includes a stacked disc body and a sealing disc, the sealing disc is located between the valve mouth edge 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; a support disc is provided in the valve body to slide with the valve stem to guide the movement of the valve core, and the support disc has a hole for fluid flow; the elastic device is a compression elastic device, and one end abuts against the valve disc, and the other end abuts against the support disc; a plurality of connecting channels evenly arranged around the axis of the valve core are provided on the valve disc to serve as the through channel.

[0017] 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.

[0018] 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 chamber of the fluid valve is connected to the driving 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.

[0019] In order to achieve the third objective, the present invention further provides a valve core of a fluid valve, the valve core of the fluid valve comprising a main body for sealing a valve port, the main body being provided with through-channels provided on both sides of the sealing direction. Since the above-mentioned fluid valves both use key through-channels, and since the above-mentioned fluid valves have the above-mentioned technical effects, the valve core 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 cross-sectional structure diagram of a first fluid valve provided by an embodiment of the present invention;

[0022] Figure 2 A schematic structural diagram of a second fluid valve provided by an embodiment of the present invention;

[0023] Figure 3 A schematic structural diagram of a third fluid valve provided by an embodiment of the present invention;

[0024] Figure 4 A schematic structural diagram of a fourth fluid valve provided in an embodiment of the present invention;

[0025] Figure 5 A schematic structural diagram of a fifth fluid valve provided by an embodiment of the present invention;

[0026] Figure 6 A schematic structural diagram of a sixth fluid valve provided in an embodiment of the present invention.

[0027] The following are marked in the accompanying drawings:

[0028] First connecting part 1, first valve body 2, sealing ring 3, sealing disk 4, disk body 5, second valve body 6, elastic device 7, outlet cavity 8, inlet cavity 9, inner shoulder 10, second connecting part 11, through channel 12, valve stem 13, valve port 14, support disk 15. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] See also Figure 1-Figure 6 , Figure 1 A schematic cross-sectional structure diagram of a first fluid valve provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of a second fluid valve provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of a third fluid valve provided by an embodiment of the present invention; Figure 4 A schematic structural diagram of a fourth fluid valve provided in an embodiment of the present invention; Figure 5 A schematic structural diagram of a fifth fluid valve provided by an embodiment of the present invention; Figure 6 A schematic structural diagram of a sixth fluid valve provided in an embodiment of the present invention.

[0032] 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 through passage 12 exists to balance the pressure, the fluid valve can also be called a one-way valve for balancing the pipeline fluid pressure.

[0033] A valve port 14 is formed on the valve body, wherein an inlet cavity 9 and an outlet cavity 8 are formed on both sides of the valve port, 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). In the blocked state of the valve port 14, 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 open valve port 14, at which time the fluid is throttled or cannot flow. Specifically, the valve core: can move to a blocking position relative to the valve body, move to block the valve port 14, that is, block at the position of the valve port 14 to limit the flow of the 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 to open the valve port 14, at which time it can be the position of exiting the valve port 14, 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 cavity 9 to the outlet cavity 8, 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 is open is generally related to the design value of the fluid valve, such as whether the flow requirements of the fluid valve are met when the drive pump is turned on. For the fluid valve, if the fluid in the inlet chamber 9 enters the outlet chamber 8, it is called forward flow, and if the fluid in the outlet chamber 8 enters the inlet chamber 9, it is called reverse flow.

[0034] 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-completely closed state, as the through channel 12 mentioned later, 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.

[0035] When there is a downstream fluid, at this time, when the fluid pressure of the inlet chamber 9 is higher than the fluid pressure of the outlet chamber 8 and is not lower than the preset pressure difference, the valve core can push the valve core to move to the open position or remain in the open position when the valve port 14 is subjected to the downstream fluid pressure, that is, the valve port 14 is opened to allow a large amount of fluid to pass through. If there is an elastic device 7, after the above preset pressure difference acts on the valve core, it is necessary to overcome the elastic force of the elastic device 7, that is, the fluid pressure of the inlet chamber 9 is larger than the fluid pressure of the outlet chamber 8 to overcome the elastic force of the elastic device 7. Of course, in the actual opening, other resistances may also need to be overcome. When there is a countercurrent fluid, at this time, the fluid pressure of the inlet chamber 9 is lower than the fluid pressure of the outlet chamber 8. The countercurrent fluid acts on the valve core. Under the action of the countercurrent fluid (opposite to the downstream direction), the valve core can be pushed to move to the blocking position or remain in the blocking position, so that no fluid can pass between the valve port and the valve core or only a small amount of fluid can pass. It should be noted that when the fluid pressure in the inlet chamber 9 is higher than the fluid pressure in the outlet chamber 8 and lower than the preset pressure difference, if there is an elastic device 7, it is necessary to balance the deformation force of the elastic device 7. If the deformation force of the elastic device 7 is larger and not enough to be overcome by the fluid pressure difference on both sides, it moves to the blocking position or remains in the blocking position. If the deformation force of the elastic device 7 is smaller and is sufficient to be overcome by the fluid pressure difference on both sides, it moves to the open position or remains in the open position.

[0036] In some embodiments, a through channel 12 is further provided for the fluid valve. When the valve core is in the blocking position to block the valve port 14, the two ends of the through channel 12 are connected to the inlet cavity 9 and the outlet cavity 8 on both sides of the valve port 14, respectively. There are two specific implementations of the through channel 12: one is that when the valve core blocks the valve port 14, although it is in a blocked state, the valve port 14 cannot be completely closed, and there is a gap or hole between the valve body and the valve core to serve as the through channel 12. The hole can be formed at the edge of the valve core or at the edge of the valve port 14. The gap can be formed between the edge of the valve core and the edge of the valve port 14 to form a gap. At this time, the valve core can be against the valve body through other parts (not at the edge of the valve port 14); the other is, as shown in the attached Figure 3 , 4 As shown, the valve body is provided with a through passage 12 separately. Figure 1 , 2 As shown in , 5 and 6, the valve core is provided with a through passage 12 alone, or the valve body and the valve core are provided with through passages 12 respectively. Of course, the above two methods can exist at the same time, that is, different through passages 12 exist.

[0037] It should be noted that the flow cross-sectional area of ​​the through-channel 12 should be smaller than the flow cross-sectional area of ​​the valve port 14 when the valve port 14 is in an open state. The through-channel 12 is mainly used to allow a small amount of fluid to pass when the valve core blocks the valve port 14. It should at least be ensured that when the valve core blocks the valve port 14, the flow cross-sectional area retained due to the existence of the through-channel 12 should be small; when the valve core withdraws to open the valve port 14, the sum of the flow cross-sectional area at the valve port 14 and the flow cross-sectional area increased by the through-channel 12 that may be opened at this time should be greater than the former. In summary, even if the above-mentioned through-channel 12 exists, it is still necessary to ensure that the flow cross-sectional area of ​​the fluid valve when the valve port 14 is open is greater than the flow cross-sectional area of ​​the fluid valve when the valve core blocks the valve port 14.

[0038] It should also be noted that the through-channel 12 can exist all the time, or it can exist only when the valve core blocks the valve port 14. For example, the gap between the valve core and the valve body mentioned above is generally formed when the valve core blocks the valve port 14. When the valve is opened, the gap is no longer the through-channel 12 in the above sense, but a flow cross section. Alternatively, the through-channel 12 is in an open state only when the valve core blocks the valve port 14; and when the valve core moves to open the valve port 14, the through-channel 12 is in a closed state, because the through-channel 12 does not need to be used for flow at this time. Of course, when the valve core moves to open the valve port 14, the same through-channel 12 remains in an open state. At this time, the fluid valve is equivalent to adding a through-channel to the current one-way valve, so that when there is a countercurrent fluid, the one-way valve is closed, but there is a through-channel to still maintain a small flow rate.

[0039] When in use, the inlet chamber 9 is used to connect the outlet of the liquid pump. When the liquid medium in the system pipeline flows back, the liquid pressure of the outlet chamber 8 will be greater than the liquid pressure of the inlet chamber 9, and the refluxed liquid medium will impact the valve core. The valve core is subjected to the impact force of the reflux of the liquid medium, so that the valve core is located in the blocking position to block in the valve port 14. At this time, it means that the main channel (also known as the large channel) of the fluid valve is closed. However, because the through channel 12 (also known as the small channel) exists, only part of the liquid medium in the small channel flows back. Since the through channel 12 is not the main channel, compared with the valve port 14 being opened, part of the liquid medium in the small channel flows back, which can no longer cause damage and influence to the operation of the water pump, or it can cause less damage and influence to the operation of the water pump. When the water pump stops running, the main channel of the fluid valve is closed. Due to the existence of the through channel 12, if the liquid inside the water pump and the water pump medium inlet side gradually loses, the liquid medium on the outlet side (outlet chamber 8) of the fluid valve medium in the pipeline system will also slowly drip back into the water pump through the through channel 12. Although the phenomenon of liquid medium dripping from the fluid valve and flowing back to the water pump is also considered as liquid medium reflux, this type of reflux is slow dripping. Since the flow cross-sectional area of ​​the through-channel 12 is very small, the dripping reflux speed is very slow. This type of reflux does not have any impact and will not cause significant damage to the water pump. The hydraulic pressure and air pressure on both sides of the fluid valve port are in a connected state, and the pressure is basically the same. After the water pump is running, the fluid valve port can be easily opened, and the hydraulic system can operate normally.

[0040] In some embodiments, in order to facilitate the sealing and abutment effect between the edge portion of the valve core and the valve mouth 14 of the valve body, it is preferred that the valve body and / or the valve core be provided with a through channel 12. Compared with leaving a gap or notch between the valve body and the valve core as the through channel 12, a separate through channel 12 is provided, which can more accurately grasp the flow cross-sectional area of ​​the through channel 12. This is because a sealing structure or cooperation is provided between the valve core and the valve body, which will cause the gaps and notches to be unstable during long-term use, resulting in structural deviations and affecting the balancing effect.

[0041] In some embodiments, a valve core is provided, wherein a main body of the valve core for sealing a valve port 14 is provided with a through channel 12 provided on both sides of the sealing direction, wherein the main body may be a valve disc, or may include the following valve disc and valve stem 13.

[0042] In some embodiments, the flow cross-sectional area of ​​the through channel 12 can be further made smaller than the flow cross-sectional area of ​​the valve port 14 in the open state. When the valve core exits the valve port 14 to open the valve port 14, it does not mean that the area around the edge of the valve port 14 is all counted as the flow cross-sectional area. The actual flow cross-sectional area at this time is used for calculation. However, it is generally preset and designed according to the needs of the fluid valve itself to ensure that the flow cross-sectional area meets the requirements when the valve port 14 is opened.

[0043] In some embodiments, generally speaking, the flow cross-sectional area of ​​the through channel 12 should be calculated corresponding to the flow cross-sectional area of ​​the valve port 14 in the open state. For example, the flow cross-sectional area of ​​the through channel 12 can be made no larger than one-fifth of the flow cross-sectional area of ​​the valve port 14 in the open state; further, the flow cross-sectional area of ​​the through channel 12 can be made no larger than one-tenth of the flow cross-sectional area of ​​the valve port 14 in the open state.

[0044] Of course, from another perspective, the through channel 12 is mainly used for a small amount of liquid to pass through, so it is related to the viscosity and pressure of the liquid medium flowing through. Therefore, the flow cross-sectional diameter of the through channel 12 can be between 1 mm and 5 mm. If it is too small, the liquid will not pass smoothly, and if it is too large, it is easy to cause the pressure of the reflux liquid to be still relatively high after passing through the through hole.

[0045] In some embodiments, an axial hole may be formed on the valve core as the through channel 12 to facilitate forming the through channel 12. Because the axial hole of the valve core is located at the center, it is convenient to set the through channel 12 with a smaller diameter.

[0046] In some embodiments, as shown in the attached Figure 5 , 6 As shown, the valve core can include a valve stem 13 and a valve disc, wherein the edge of the valve disc can abut against the valve port 14 of the valve body to seal. The middle of the valve disc is connected to the valve stem 13, and a through hole is provided between the edge of the valve disc and the middle of the valve disc to serve as a through channel 12. Specifically, the valve disc is provided with a plurality of communication channels evenly arranged around the axis of the valve core to serve as the through channel.

[0047] In some embodiments, a through channel 12 may be formed on the valve body, such as a hole formed on the side wall of the valve body.

[0048] In some embodiments, as shown in the attached Figure 1 , 4As shown in , 5, an elastic device 7 may be provided, and the elastic device 7 is provided between the valve core and the valve body to push the valve core to block the valve port 14, and the valve core can block the valve port 14 under the push of the elastic device 7. And the valve core can, under the action of the fluid (downstream fluid) flowing along the preset flow direction, when the fluid pressure entering the inlet chamber 9 is higher than the fluid pressure of the outlet chamber 8 and reaches the opening pressure difference, overcome the elastic force of the elastic device 7, and move to make the valve port 14 in an open state. When the elastic device 7 pushes the valve core to block the valve port 14, the valve core will abut against the valve body at this time, so that the elastic device 7 is in a pre-tightened state, and the smaller the pre-tightening force, the better, to facilitate the flow of the downstream fluid. The specific preset flow direction fluid, that is, the downstream fluid, refers to the fluid flowing along the allowed flow direction, and the allowed flow direction is generally a preset setting. In practical applications, the allowed flow direction is opposite to the direction of the force of the elastic device 7 on the valve core, so that the fluid flowing in the reverse direction along the allowed flow direction has the same force on the valve core as the force of the elastic device 7 on the valve core.

[0049] 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.

[0050] 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.

[0051] 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 may also be called a sealing gasket or a sealing ring, which is generally made of a soft material structure such as rubber or silicone. When the disc body 5 is squeezed 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. As shown in the accompanying drawings, in order to better extrude the sealing disc 4, an inner raised shoulder 10 may be formed on the valve body, and the inner shoulder has a raised portion that is raised, and the width of the raised portion gradually decreases toward one side of the sealing disc 4 to form a pointed portion, so as to improve the sealing contact effect. The inner shoulder may also be formed on the valve body, but the inner shoulder forms 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 disc 4. As shown in the attached figure Figure 5 , 6 As shown, when a through passage 12 is provided on the valve disc, the disc body 5 and the sealing disc 4 can both be provided with aligned holes to form the through passage 12 .

[0052] As attached Figure 3 , 4 As shown, the valve core may not be provided with a through passage, but a communication passage may be provided on the inner shoulder 10 as the through passage 12. Specifically, the valve body may be provided with a plurality of communication passages evenly arranged around the axis of the valve core as the through passage.

[0053] 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.

[0054] In some embodiments, in order to facilitate the installation of the valve core, the valve body may include a first valve body 2 and a second valve body 6, wherein the first valve body 2 has a valve port 14, 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 threads, and the axis of the thread is coaxially arranged with the axis of the valve core.

[0055] 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.

[0056] 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.

[0057] In some embodiments, as shown in the attached Figure 2 , 3As shown in Figure 6, the fluid valve may not be provided with the elastic device 7. When the elastic device 7 is not provided: when the pressure of the fluid entering the inlet chamber 9 is higher than the pressure of the fluid entering the outlet chamber 8, the fluid in the inlet chamber 9 will push the valve core to move toward the open position, and move to the open position to make the valve port in the open state; and when the pressure of the fluid entering the inlet chamber 9 is lower than the pressure of the fluid entering the outlet chamber 8, the fluid in the outlet chamber 8 will push the valve core to move toward the blocking position, and move to the blocking position to block the valve port.

[0058] 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, and also includes a driving pump, the fluid valve is arranged at the pump outlet of the driving pump, and the inlet chamber 9 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.

[0059] When the driving pump is operating normally, the liquid medium can smoothly pass through the valve core head to push open the valve core. At this time, the elastic device 7 is squeezed, and the valve core no longer contacts the edge of the valve port 14 protruding from the inside of the first valve body 2. The fluid valve medium flow channel is opened, and the flow channel can be regarded as the main large channel inside the fluid valve.

[0060] When the liquid medium in the system pipeline flows back, the backflowing liquid medium impacts the valve core, and the valve core is subjected to the impact force of the backflowing liquid medium and the elastic force of the elastic device 7, and the disc body 5 squeezes the sealing disc 4 toward the edge of the valve port 14, and the sealing disc 4 is sealed again with the contact surface of the edge of the valve port 14. At this time, the large channel of the one-way valve is closed, and only part of the liquid medium flows back in the through channel 12 which serves as a small channel. However, since the diameter of the through channel 12 is very small, even if part of the liquid medium flows back in the small channel, it will not cause any damage or influence on the operation of the driving pump.

[0061] When the driving pump stops running, the large channel of the fluid valve is closed. Since the through channel 12 connects both sides, if the liquid inside the driving pump and on the medium inlet side of the driving pump gradually leaks, the liquid medium on the medium outlet side of the fluid valve in the pipeline system will also slowly drip back into the driving pump from the through channel 12. Although the phenomenon of liquid medium dripping back into the driving pump from the fluid valve also belongs to liquid medium reflux, due to the small diameter of the through channel 12, the dripping reflux speed is very slow. This kind of reflux does not have any impact force and will not cause any damage to the driving pump. Finally, the liquid pressure and gas pressure on both sides of the fluid valve are in a basically consistent equilibrium state. After the driving pump is restarted, the liquid inside the pipeline system is connected and flows at the same time, and no alarm failure occurs.

[0062] In this way, the above-mentioned fluid valve can effectively prevent the damage to the operation of the driving pump caused by the violent backflow of the pipeline system, and the design of the through channel 12 can effectively solve the problem of unbalanced fluid pressure in the pipeline when the driving pump stops running, thus killing two birds with one stone.

[0063] 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.

[0064] 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 comprises a valve port (14) and an inlet chamber (9) and an outlet chamber (8) located on both sides of the valve port (14); the valve core is movably arranged on the valve body, and can be located in an open position to open the valve port (14) when the fluid pressure of the inlet chamber (9) is higher than the fluid pressure of the outlet chamber (8) and is not lower than a preset pressure difference, and can be located in a blocked position to block the valve port (14) when the fluid pressure of the inlet chamber (9) is lower than the fluid pressure of the outlet chamber (8); the through channel (12) is characterized in that it also comprises a through channel (12), and when the valve core is located in the blocked position, the through channel (12) can respectively connect the inlet chamber (9) and the outlet chamber (8) on both sides of the valve port (14) with the channel openings at both ends to connect the inlet chamber (9) and the outlet chamber (8) to communicate with the inlet chamber (9) and the outlet chamber (8).

2. The fluid valve according to claim 1, characterized in that: The valve body and / or the valve core is provided with the through passage (12); the through passage (12) has a flow cross-sectional area that is smaller than the flow cross-sectional area of ​​the valve port (14) in an open state.

3. The fluid valve according to claim 2, characterized in that: The flow cross-sectional area of ​​the through-channel (12) is no greater than one fifth of the flow cross-sectional area of ​​the valve port (14) in an open state.

4. The fluid valve according to claim 2, characterized in that: An axial hole is formed on the valve core to serve as the through passage (12); and / or a plurality of communication passages evenly arranged around the axis of the valve core are provided on the valve body to serve as the through passage.

5. The fluid valve according to claim 1, characterized in that: The valve core comprises a valve stem (13) and a valve disc, the edge of the valve disc being able to abut against the valve opening edge of the valve body to be sealed, the middle of the valve disc being connected to the valve stem (13), and a through hole being provided between the edge and the middle of the valve disc to serve as the through channel (12).

6. The fluid valve according to claim 1, characterized in that: When the valve core moves to the blocking position, a gap is formed between the valve core and the valve body to serve as the through passage.

7. The fluid valve according to any one of claims 1 to 6, characterized in that: It also includes an elastic device (7) for preventing the valve core from moving from a blocking position to an open position, so that it can be deformed under pressure when the pressure of the fluid entering the inlet chamber (9) is higher than the pressure of the fluid entering the outlet chamber (8) and reaches an opening pressure difference, so that the valve core can move to the open position, and can push the valve core to move to the blocking position when the pressure of the fluid entering the inlet chamber (9) is not higher than the pressure of the fluid entering the outlet chamber (8).

8. The fluid valve according to claim 7, 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; the disc body (5) and the head of the valve stem (13) are connected to each other. A groove is formed between the valve stem (13) and the inner edge of the sealing disc (4) is inserted into the groove; a support disc (15) is provided in the valve body to slidably cooperate with the valve stem (13) to guide the movement of the valve core, and the support disc (15) has a hole for fluid flow; the elastic device (7) is a compression elastic device, one end of which abuts against the valve disc and the other end of which abuts against the support disc (15); a plurality of communication channels evenly arranged around the axis of the valve core are provided on the valve disc to serve as the through channel (12).

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 a fluid valve as described in 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 (9) of the fluid valve is connected to the pump outlet.

11. A valve core of a fluid valve, comprising a main body for sealing a valve port, characterized in that: The main body is provided with through passages which are arranged on both sides of the sealing direction.

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