Flow control regulating valve assembly and valve element thereof

Abstract

The invention relates to the technical field of regulating valves, in particular to a flow control regulating valve assembly and a valve element thereof.The flow control regulating valve assembly comprises a valve body installed at the top end of the inner side wall of an oil cavity and the valve element arranged in the valve body and further comprises a limiting outer pipe, a telescopic outer pipe and a telescopic inner pipe, and the limiting outer pipe is installed on the lower surface of the valve body; the telescopic outer pipe is arranged on the inner side of the limiting outer pipe. Through the combination of the first folding pipe, the second folding pipe and the butt joint inner strip plate, the adjusting valve assembly can automatically adapt to the change of the oil liquid level, when the oil liquid level floats, the telescopic inner pipe can be correspondingly folded or stretched, the valve element is driven to quickly respond, the position of the valve element is adjusted, and the valve is closed or opened in time; through the hollow long-strip structure of the floater, the inner side end of the floater is aligned with the inner side end of the valve body, the contact area of the floater and the oil surface is increased, buoyancy is enhanced, floating of the floater is stabilized, and the problem that the floater is unstable due to equipment vibration or oil liquid shaking is solved.

Description

Technical Field

[0001] The invention relates to the technical field of regulating valves, in particular to a flow control regulating valve component and a valve core thereof. Background Art

[0002] As a key equipment in the process of industrial automation, the core of flow control valve lies in the precisely designed valve core. The valve core is driven by the actuator to flexibly adjust the flow cross-sectional area between the valve seat and the valve seat to achieve precise flow control of the fluid medium. This core function is due to the diverse types and material selection of the valve core to adapt to different process conditions and medium characteristics. At the same time, the valve body as a supporting skeleton ensures the structural strength and corrosion resistance of the control valve; the valve seat is closely matched with the valve core to ensure the sealing performance of the valve; the valve stem as a connecting part ensures the smooth transmission between the actuator and the valve core; and the actuator, as a power source, provides a variety of driving methods to meet the needs of different field conditions. In addition, auxiliary components such as seals and guides also play a vital role, which together improve the overall performance and stability of the control valve. Therefore, when selecting and installing flow control valves, it is necessary to comprehensively consider the process requirements, medium characteristics and the synergy of various components to ensure accurate flow control and stable operation of the system.

[0003] The stability of the oil in the oil tank is crucial to the normal operation of the equipment. Too much or too little oil will affect the performance and life of the equipment. The float valve has an automatic adjustment function and can automatically adjust the opening and closing state of the valve according to the change of the liquid level. When the oil in the oil tank reaches the preset high level, the float rises to a certain height and drives the valve to close through the crank arm to prevent the oil from continuing to flow into the oil tank and avoid oil overflow. On the contrary, when the oil in the oil tank is lower than the preset low level, the float drops and drives the valve to open through the connecting rod, allowing external oil to flow into the oil tank through the pipeline to replenish the oil to the appropriate level. The float valve continuously senses the changes in the liquid level in the oil tank and automatically adjusts the opening and closing state of the valve, thereby keeping the oil in the oil tank stable within the preset liquid level range.

[0004] Many equipment, such as loaders and excavators, usually have hydraulic oil tanks installed under or behind the cab. When driving or operating on rough roads, the contact force between the equipment's tires or tracks and the ground is constantly changing, causing the equipment to vibrate as a whole. This vibration is transmitted to the hydraulic oil tank through the equipment's structure, affecting the oil in the tank, causing the oil in the tank to slosh. The sloshing of the oil will cause the float to float unstably in the tank, thereby affecting the float's accurate sensing of the liquid level change, which can easily cause the float valve to misjudge the liquid level height, thereby affecting the valve's opening and closing control. Further consideration is that due to the inaccurate liquid level change sensed by the float, the float valve will open or close early or late, resulting in too much or too little oil in the tank. Loaders and excavators usually need to operate in various complex working environments. The hydraulic system of the equipment will experience frequent load changes. Accurately fixing the liquid level height can ensure that the system can maintain a stable amount of oil under different loads. If the liquid level is too high, the oil may overflow from the tank, causing waste and environmental pollution; if the liquid level is too low, it may cause insufficient oil absorption in the hydraulic system, thus affecting the normal operation of the hydraulic system.

[0005] To this end, a flow control regulating valve assembly and a valve core thereof are proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a flow control regulating valve assembly and a valve core thereof, in order to solve the problem that the oil in the hydraulic oil tank shakes due to the vibration of the equipment, resulting in inaccurate float sensing, misjudgment of the float valve, and affecting the stability of the oil level in the oil tank. After the float floats to a preset height on the horizontal liquid surface or floats on the undulating oil surface, the telescopic outer tube and the telescopic inner tube spontaneously adjust the height of the float to immediately push the valve core to move and close the valve port.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A flow control regulating valve assembly and a valve core thereof, comprising a valve body mounted on the top end of an inner wall of an oil chamber and a valve core arranged inside the valve body, and further comprising a limit outer tube, a telescopic outer tube and a telescopic inner tube, wherein the limit outer tube is mounted on the lower surface of the valve body, the telescopic outer tube is arranged on the inner side of the limit outer tube, the top end of the telescopic outer tube is in contact with the bottom surface of the valve core, the telescopic inner tube is mounted on the inner side of the telescopic outer tube, a float is arranged on the bottom end of the telescopic inner tube extending downward, and the telescopic inner tube comprises a folding tube first, a folding tube second and The docking inner strip plate, the folding tube one is located inside the telescopic outer tube, the folding tube two is installed at the lower end of the folding tube one, the docking inner strip plate is arranged between the folding tube one and the folding tube two, the float floats on the oil surface inside the oil chamber, and the float floats to a preset height in accordance with the horizontal liquid surface to push the valve core to move and close the valve port, the telescopic outer tube, the folding tube one and the folding tube two spontaneously adjust the comprehensive length in accordance with the height of the float, and the float floats on the undulating oil surface, drives the folding tube one and the folding tube two to fold in half, and immediately pushes the valve core to move and close the valve port.

[0009] From the above scheme, it can be seen that the combination of the float and the telescopic tube structure realizes the precise response and automatic adjustment of the oil level change in the oil chamber. The float moves with the rise and fall of the oil level. When the oil level reaches the preset height, the float pushes the valve core to close the valve port, effectively preventing the oil from overflowing or being too low. At the same time, the coordinated use of the telescopic outer tube and the telescopic inner tube makes the entire adjustment process more flexible and stable, and can adapt to different oil level changes, without the need for an external power source, reducing energy consumption and maintenance costs.

[0010] Preferably, the float is made of stainless steel and has a hollow plate structure, and the inner end of the float is aligned with the inner end of the valve body.

[0011] From the above scheme, it can be seen that the design of aligning the inner end of the float with the inner end of the valve body using a hollow long strip structure improves the response speed and accuracy of the regulating valve, allowing the float to sense the change of the oil level more directly and sensitively, and because the float is aligned with the inner side of the valve body, the resistance and deviation during the movement of the float are reduced, ensuring the accurate execution of the regulating action. In addition, the hollow long strip structure also enhances the buoyancy and stability of the float, allowing it to maintain a good working condition under various working conditions, thereby improving the performance and reliability of the entire flow control regulating valve assembly.

[0012] Preferably, an oil inlet is arranged at the center of the upper surface of the valve body, a valve cavity matching the valve core is arranged inside the valve body, and a movable open groove is arranged on the bottom surface of the valve body.

[0013] From the above scheme, it can be seen that the oil can directly enter the valve body from the oil inlet, reducing the path and resistance of the oil flow and improving the efficiency of flow control. At the same time, the precise matching of the valve cavity and the valve core ensures the stability and sealing of the valve core during movement and prevents oil leakage.

[0014] Preferably, both ends of the docking inner strip are provided with movable shaft parts 2, the bottom end of the folding tube 1 and the top end of the folding tube 2 are provided with U-shaped grooves, the U-shaped groove of the folding tube 1 matches the outer size of the folding tube 2, and the U-shaped groove of the folding tube 2 matches the outer size of the docking inner strip, one end of the docking inner strip is connected to the inner end of the U-shaped groove of the folding tube 1 through a movable shaft part 2, a sliding block is installed at the outer end of the U-shaped groove of the folding tube 1, and the other end of the docking inner strip is connected to the inner end of the U-shaped groove of the folding tube 2 through another movable shaft part 2, and limiting sliding grooves are provided on both outer side surfaces of the folding tube 2, and the sliding blocks match the limiting sliding grooves.

[0015] It can be seen from the above scheme that: by connecting the inner strip, the second movable shaft, the U-shaped slot, the sliding block and the limit slide groove, an adjustment mechanism with both high flexibility and stability of the telescopic inner tube is realized. Compared with the existing technology, it can ensure that the telescopic inner tube responds quickly and accurately when the oil level changes, and realizes smooth folding and unfolding through the second movable shaft. At the same time, the cooperation of the sliding block and the limit slide groove ensures the stability and accuracy of the adjustment process, and improves the overall performance and reliability of the flow control regulating valve.

[0016] Preferably, both inner side walls of the middle end of the position-limiting outer tube are provided with a movable shaft member 1, and the position-limiting outer tube is connected to the side surface of the telescopic outer tube through the movable shaft member 1.

[0017] It can be seen from the above scheme that: by setting a movable shaft part 1 on the two inner side walls of the middle end of the limit outer tube, a flexible connection is formed between the limit outer tube and the telescopic outer tube. Compared with the fixed connection or rigid connection commonly used in the prior art, this design allows the telescopic outer tube to perform a smoother and more stable telescopic movement along the movable shaft part 1 when the oil level changes, which not only improves the response speed of the flow control regulating valve, but also extends the service life of the components and reduces the wear and stress concentration caused by the rigid connection. At the same time, the movable shaft part plays the role of positioning and guiding, ensuring the accuracy and stability of the telescopic outer tube during the telescopic process, thereby improving the performance and reliability of the entire regulating valve assembly.

[0018] Preferably, the telescopic outer tube includes a tube body, a tube cavity, a limit notch and a triangular groove. The tube body is located at the lower end of the valve core, the tube cavity is opened inside the tube body, the limit notch is opened at the bottom end of the tube body, the limit notch matches the folding tube, and the triangular groove is opened at the top of the tube body.

[0019] It can be seen from the above scheme that a more sophisticated and efficient oil level adjustment mechanism is provided through the assembly of the tube body, the tube cavity, the limit notch and the triangular slot. The combination of the tube body and the tube cavity provides a stable movement space for the telescopic inner tube, ensuring the smoothness of the adjustment process. The matching design of the limit notch and the folding tube not only limits the movement range of the telescopic inner tube, but also enhances its structural stability and prevents damage caused by excessive telescopic expansion. The setting of the triangular slot further optimizes the connection between the telescopic outer tube and the valve core, so that the valve core can respond more quickly and accurately when pushed by the float, thereby improving the sensitivity and adjustment accuracy of the flow control regulating valve.

[0020] Preferably, both side ends of the lower surface of the valve core are provided with butt-jointing strips, and the two corners at the top end of the tube body are connected to the inner sides of the butt-jointing strips.

[0021] From the above scheme, it can be seen that the docking design of the docking clamps set on both sides of the lower surface of the valve core and the two corners of the top of the tube body improves the connection stability and adjustment efficiency between the valve core and the telescopic outer tube. The inner side of the docking clamps and the two corners of the top of the tube body are tightly matched, which not only ensures the stability of the valve core during movement, but also reduces the friction and wear caused by looseness between components, so that the valve core can respond to the push of the float more quickly and accurately, thereby realizing precise control of oil level changes.

[0022] Preferably, the folding tube 1 includes a sliding tube fitting, a limit connecting block and a triangular top block, the sliding tube fitting matches the limit slot, the limit connecting block is arranged on both side surfaces of the top end of the sliding tube fitting, the sliding tube fitting and the limit connecting block match the tube cavity, the triangular top block is installed on the upper surface of the top end of the sliding tube fitting, an extrusion groove is opened in the center of the lower surface of the valve core, the extrusion groove corresponds to the triangular groove, one side surface of the extrusion groove is an inclined slope structure, and the width of the inner bottom surface of the extrusion groove matches the sliding tube fitting.

[0023] It can be seen from the above scheme that: by matching the extrusion groove on the lower surface of the valve core and the tube cavity and triangular groove of the telescopic outer tube, a more precise and efficient oil level adjustment mechanism is provided compared with the existing technology. The matching of the sliding pipe fitting and the limit notch ensures the stability of the telescopic inner tube during the telescopic process, and the limit connection block further enhances this stability and prevents the folding tube from shaking in the tube cavity. The triangular top block matches the inclined slope structure of the extrusion groove, so that when the float pushes the telescopic inner tube to rise, it can push the valve core to move more smoothly. The width of the inner bottom surface of the extrusion groove matches the sliding pipe fitting, ensuring close contact between the two, reducing friction and wear, and extending the service life of the components.

[0024] Preferably, the upper surface of the float is provided with a triangular slope, and the bottom end of the second folding tube is connected to the upper surface of the triangular slope.

[0025] It can be seen from the above scheme that the inclined structure of the triangular slope enables the float to push the folding tube 2 and the connected telescopic inner tube upward more steadily and smoothly as the oil level rises, reducing the instantaneous impact force caused by direct impact and extending the service life of the components. At the same time, due to the close cooperation between the triangular slope and the bottom end of the folding tube 2, it is ensured that the oil level change can be quickly and accurately converted into the telescopic movement of the telescopic inner tube, thereby improving the response speed and adjustment accuracy of the flow control regulating valve.

[0026] Preferably, a herringbone-shaped cavity is provided inside the valve core, and the herringbone-shaped cavity is a three-way structure.

[0027] From the above scheme, it can be seen that the three-way design of the herringbone cavity enables the valve core to connect three fluid channels at the same time, realizing flexible distribution and regulation of the fluid. The structure of the herringbone cavity is compact, which reduces the volume and weight of the valve core, making the entire valve lighter, easier to install and maintain. At the same time, the compact structure also helps to improve the sealing performance of the valve and reduce the risk of fluid leakage. The design of the herringbone cavity also takes into account the flow characteristics of the fluid. Through reasonable layout and angle design, it can optimize the flow path of the fluid, reduce fluid resistance and energy loss, and improve the overall performance of the system.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. A flow control regulating valve assembly and a valve core thereof. Through the combination of a folding tube 1, a folding tube 2 and a butt inner strip plate, the regulating valve assembly can automatically adapt to changes in the oil level. When the oil level floats, the telescopic inner tube will be folded or extended accordingly, driving the valve core to respond quickly and adjust its position, and close or open the valve in time. This adaptive adjustment and rapid response design effectively avoids valve misjudgment caused by fluctuations in the oil level, ensures accurate control of the oil volume, and maintains the normal operation of the hydraulic system.

[0030] 2. A flow control regulating valve assembly and its valve core, using the hollow long strip structure of the float, the inner end of which is aligned with the inner end of the valve body, which not only increases the contact area between the float and the oil surface, but also enhances the buoyancy and stabilizes the floating of the float, reduces the problem of float instability caused by equipment vibration or oil sloshing, and improves the float's ability to accurately sense liquid level changes. In addition, the triangular slope on the float can naturally slide off the splashed oil droplets, further ensuring the weight of the float and accurate liquid level sensing.

[0031] 3. A flow control regulating valve assembly and its valve core. The overall structure of the regulating valve assembly is an approximately vertical structure and is attached to the side wall of the oil chamber, which not only reduces the space occupied in the oil chamber, but also makes the valve system more stable. When the oil level is in a fluctuating state, the valve is closed in time through the folding of folding tube 1 and folding tube 2 through the force of the float, avoiding misoperation that may be caused by oil level fluctuations, improving the stability and reliability of the valve system under complex working conditions, and ensuring the normal operation of the hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of the valve body assembly of the present invention located in the oil tank;

[0033] Figure 2 It is a structural schematic diagram of the valve body assembly of the present invention floating on a horizontal liquid surface;

[0034] Figure 3 It is a schematic diagram of the internal planar structure of the valve body assembly of the present invention;

[0035] Figure 4 It is a schematic diagram of the overall structure of the valve body assembly of the present invention;

[0036] Figure 5 It is a schematic diagram of the structure of the valve body assembly of the present invention being folded;

[0037] Figure 6 It is a schematic diagram of the disassembled structure inside the valve body assembly of the present invention;

[0038] Figure 7 It is a schematic diagram of the structure of the assembly of the telescopic outer tube and the telescopic inner tube of the present invention;

[0039] Figure 8 It is a structural schematic diagram of the assembly of the telescopic outer tube and the valve core of the present invention;

[0040] Fig. 9 It is a schematic diagram of the internal plane structure of the valve core of the present invention when it is displaced;

[0041] Fig.10 It is a schematic structural diagram of the valve body assembly of the present invention floating on an undulating liquid surface.

[0042] In the figure: 1. valve body; 11. oil inlet; 12. valve cavity; 13. movable open groove; 2. valve core; 21. extrusion groove; 22. docking clamp; 23. herringbone cavity; 3. limit outer tube; 31. movable shaft member 1; 4. telescopic outer tube; 41. tube body; 42. tube cavity; 43. limit slot; 44. triangular slot; 5. telescopic inner tube; 51. folding tube 1; 511. sliding tube; 512. limit connecting block; 513. triangular top block; 514. U-shaped slot; 515. small sliding block; 52. folding tube 2; 53. docking inner strip; 54. movable shaft member 2; 55. limit slide; 6. float; 61. triangular slope. DETAILED DESCRIPTION

[0043] 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.

[0044] See also Figures 1 to 10 The present invention provides a flow control regulating valve assembly and a valve core thereof, and the technical solution is as follows:

[0045] A flow control regulating valve assembly, comprising a valve body 1 installed at the top end of the inner wall of an oil chamber and a valve core 2 arranged inside the valve body 1, and also comprising a limit outer tube 3, a telescopic outer tube 4 and a telescopic inner tube 5, wherein the limit outer tube 3 is installed on the lower surface of the valve body 1, the telescopic outer tube 4 is arranged on the inner side of the limit outer tube 3, the top end of the telescopic outer tube 4 is in contact with the bottom surface of the valve core 2, the telescopic inner tube 5 is installed on the inner side of the telescopic outer tube 4, the bottom end of the telescopic inner tube 5 is extended downwardly and provided with a float 6, the telescopic inner tube 5 comprises a folding tube 1 51, a folding tube 2 52 and a butt inner strip 5 3. The foldable tube 1 51 is located inside the telescopic outer tube 4, the foldable tube 2 52 is installed at the lower end of the foldable tube 1 51, the docking inner strip 53 is arranged between the foldable tube 1 51 and the foldable tube 2 52, the float 6 floats on the oil surface inside the oil chamber, and after the float 6 floats to a preset height in accordance with the horizontal liquid surface, it pushes the valve core 2 to move and close the valve port. The telescopic outer tube 4, the foldable tube 1 51 and the foldable tube 2 52 spontaneously adjust the comprehensive length in accordance with the height of the float 6. After the float 6 floats on the undulating oil surface, it drives the foldable tube 1 51 and the foldable tube 2 52 to fold in half, and immediately pushes the valve core 2 to move and close the valve port.

[0046] In this embodiment, through buoyancy, the float 6 spontaneously adjusts its height according to the liquid level. When the liquid level has not reached a preset height, the oil enters the oil chamber through the valve core 2. When the liquid level reaches a preset height, the valve core 2 is displaced, the valve port is closed, and the oil inlet is stopped. An oil outlet is provided at the bottom of the oil tank to supply oil to the hydraulic system. The regulating valve assembly as a whole is an approximately vertical structure, which is attached to the side wall of the oil chamber, intuitively senses changes in the oil height, automatically adjusts the opening and closing state of the valve, and effectively reduces the space occupied in the oil chamber.

[0047] As an embodiment of the present invention, refer to Figure 1-Figure 3 The float 6 is made of stainless steel and has a hollow plate structure. The inner end of the float 6 is aligned with the inner end of the valve body 1.

[0048] In this embodiment, the plate structure of the float 6 is utilized, and its contact area with the oil surface is larger than that of the sphere, thereby expanding the contact area with the oil surface to increase the volume of the displaced fluid, thereby enhancing the buoyancy, so as to have sufficient buoyancy to push the valve core 2 to move, and in the case of frequent oil level fluctuations, the heavier stainless steel float 6 can better resist the interference caused by the fluctuations.

[0049] As an embodiment of the present invention, refer to Figure 4 and Figure 6 An oil inlet 11 is provided at the center of the upper surface of the valve body 1 , a valve cavity 12 matching the valve core 2 is provided inside the valve body 1 , and a movable open groove 13 is provided on the bottom surface of the valve body 1 .

[0050] In this embodiment, under normal conditions, the valve core 2 is located in the center of the valve cavity 12, and the valve cavity 12 has enough space for the valve core 2 to move. As the loader, excavator and other equipment start and stop during operation, the valve core 2 will be subjected to the inertial force of moving forward or backward. However, under the traction of the telescopic outer tube 4 and the gravity of the float 6, the inertial force is offset, and the valve core 2 will remain in the middle position of the valve body 1, and the float 6 has a one-way control effect on the valve core 2.

[0051] As an embodiment of the present invention, refer to Figure 6 and Figure 7, both ends of the docking inner strip 53 are provided with movable shaft parts 2 54, the bottom end of the folding tube 1 51 and the top end of the folding tube 2 52 are provided with U-shaped grooves 514, the U-shaped grooves 514 of the folding tube 1 51 match the outer dimensions of the folding tube 2 52, and the U-shaped grooves 514 of the folding tube 2 52 match the outer dimensions of the docking inner strip 53, one end of the docking inner strip 53 is connected to the inner end of the U-shaped groove 514 of the folding tube 1 51 through a movable shaft part 2 54, and a sliding block 515 is installed at the outer end of the U-shaped groove 514 of the folding tube 1 51, and the other end of the docking inner strip 53 is connected to the inner end of the U-shaped groove 514 of the folding tube 2 52 through another movable shaft part 2 54, and the two outer side surfaces of the folding tube 2 52 are provided with limiting sliding grooves 55, and the sliding blocks 515 match the limiting sliding grooves 55.

[0052] In this embodiment, whenever the float 6 floats on the fluctuating liquid surface, the folding tube 2 52 and the folding tube 1 51 are folded in half, and the docking inner strip 53, the folding tube 1 51 and the docking inner strip 53 form a triangular area. The docking inner strip 53 is a fixed edge, and the sliding connection between the sliding block 515 and the limiting slide groove 55 is utilized. The docking point of the folding tube 2 52 and the folding tube 1 51 is in an active state. Once the float 6 tilts, the folding tube 2 52 will drive the folding tube 1 51 to tilt in the opposite direction, and the telescopic outer tube 4 and the folding tube 1 51 tilt synchronously. The top of the telescopic outer tube 4 deviates to one side, and the valve core 2 is displaced, so that the oil inlet 11 is blocked. Therefore, no matter whether the oil level reaches the preset height, as long as the liquid level is in a fluctuating state, the valve is immediately closed to avoid misjudgment of the valve component.

[0053] As an embodiment of the present invention, refer to Figure 5 Both inner side walls of the middle end of the limiting outer tube 3 are provided with a movable shaft member 31, and the limiting outer tube 3 is connected to the side surface of the telescopic outer tube 4 through the movable shaft member 31.

[0054] In this embodiment, the limiting outer tube 3 retracts the telescopic outer tube 4 and the telescopic inner tube 5 inside, so that the regulating valve assembly as a whole is an approximately vertical structure, and the inner side of the limiting outer tube 3 has enough space for the telescopic outer tube 4 and the telescopic inner tube 5 to move, and the movable shaft 1 31 is used to limit the movement space of the tube body 41 to assist the flexibility of the folding tube 1 51 and the folding tube 2 52 during the folding process.

[0055] As an embodiment of the present invention, refer to Figure 7The telescopic outer tube 4 includes a tube body 41, a tube cavity 42, a limit slot 43 and a triangular slot 44. The tube body 41 is located at the lower end of the valve core 2, the tube cavity 42 is opened inside the tube body 41, the limit slot 43 is opened at the bottom end of the tube body 41, the limit slot 43 matches the folding tube 51, and the triangular slot 44 is opened at the top of the tube body 41.

[0056] In this embodiment, the triangular groove 44, the tube cavity 42 and the limiting groove 43 are in a connected state. The triangular groove 44 is used for the folding tube 51 to connect with the extrusion groove 21, and the limiting groove 43 is used to limit the folding tube 51. The folding tube 51 slides in the tube cavity 42 to adjust the combined length of the telescopic outer tube 4 and the telescopic inner tube 5 to adapt to the oil level.

[0057] As an embodiment of the present invention, refer to Figure 7 and Fig.10 Both sides of the lower surface of the valve core 2 are provided with docking clamps 22 , and the two corners at the top of the tube body 41 are connected to the inner side of the docking clamps 22 .

[0058] In this embodiment, the butt clamp 22 is movably connected to two corners of the triangular slot 44 , and the butt clamp 22 has a gap with sufficient space to accommodate the angle change of the top end of the tube 41 .

[0059] As an embodiment of the present invention, refer to Figure 7 and Figure 8 The folding tube 51 includes a sliding tube 511, a limit connecting block 512 and a triangular top block 513. The sliding tube 511 matches the limit groove 43. The limit connecting block 512 is arranged on the two side surfaces of the top of the sliding tube 511. The sliding tube 511 and the limit connecting block 512 match the tube cavity 42. The triangular top block 513 is installed on the upper surface of the top of the sliding tube 511. An extrusion groove 21 is opened in the center of the lower surface of the valve core 2. The extrusion groove 21 corresponds to the triangular groove 44. One side surface of the extrusion groove 21 is an inclined slope structure. The width of the inner bottom surface of the extrusion groove 21 matches the sliding tube 511.

[0060] In this embodiment, when the liquid level is in a horizontal state, the folding tube 1 51 and the folding tube 2 52 are on the same vertical line and will not fold. When the liquid level changes, the folding tube 1 51 will rise and fall along the tube cavity 42 to complete the length adjustment of the telescopic outer tube 4 and the telescopic inner tube 5. The triangular top block 513 is approximately a right-angled triangle, and the inclined surface of the triangular top block 513 is in the opposite direction to the inclined surface inside the extrusion groove 21. When the top of the triangular top block 513 docks with the inclined surface of the extrusion groove 21, it will push the valve core 2 to move to one side, and then control the valve to close when the liquid level reaches a preset height. This regulating valve assembly is suitable for occasional bumpy road conditions, and uses the float 6 to resist the interference caused by fluctuations to avoid the float valve from misjudging the liquid level height. Long-term valve port closure will affect the normal oil replenishment of the fuel tank, so it is not suitable for long-term bumpy road conditions.

[0061] As an embodiment of the present invention, refer to Figure 4 The upper surface of the float 6 is provided with a triangular slope 61 , and the bottom end of the folding tube 2 52 is connected to the upper surface of the triangular slope 61 .

[0062] In this embodiment, after the oil enters the oil cavity, if oil droplets splash onto the upper surface of the float 6 , the oil droplets will naturally slide into the oil liquid by utilizing the bidirectional inclined structure of the triangular slope 61 , thereby preventing the oil droplets from staying on the upper surface of the float 6 .

[0063] A valve core of a flow control regulating valve assembly, see Figure 7-Figure 9 A herringbone-shaped cavity 23 is provided inside the valve core 2, and the herringbone-shaped cavity 23 is a three-way structure.

[0064] In this embodiment, the herringbone cavity 23 has three upper and lower oil ports. The upper opening of the herringbone cavity 23 corresponds to the oil inlet 11, and the two lower openings of the herringbone cavity 23 are equidistantly distributed on both sides of the extrusion groove 21 and are located on both sides of the docking clamp 22. Under normal conditions, the oil body enters the oil along both sides of the telescopic outer tube 4.

[0065] Working principle: The float 6 floats on the oil surface inside the oil chamber by utilizing the buoyancy principle. When the oil level in the hydraulic oil tank is horizontal, the float 6 floats to a preset height on the liquid surface, and the telescopic outer tube 4 and the telescopic inner tube 5 spontaneously adjust their combined lengths in accordance with the height of the float 6, and the telescopic inner tube 5 pushes the valve core 2 to move and close the valve port; when the oil level in the hydraulic oil tank is undulating, the telescopic inner tube 5 is folded in half, and the telescopic outer tube 4 pushes the valve core 2 to move and close the valve port.

[0066] Specifically, when the oil level in the hydraulic oil tank has not reached the preset height, but is in a horizontal state, the valve core 2 is located at the center of the oil inlet 11, the upper end opening of the herringbone cavity 23 is aligned with the oil inlet 11, and the oil enters the oil cavity along the two openings at the lower end of the herringbone cavity 23. The float 6 gradually floats up in accordance with the liquid level, and the sliding pipe 511 gradually moves up along the cavity 42. The comprehensive lengths of the telescopic outer tube 4 and the telescopic inner tube 5 are relatively adjusted until the triangular top block 513 passes through the triangular slot 44 and corresponds to the extrusion groove 21. The tip of the triangular top block 513 is squeezed with the slope of the extrusion groove 21, and the triangular top block 513 completely enters the inner side of the extrusion groove 21. The valve core 2 is moved to one side end of the valve cavity 12 by the extrusion force. At this time, the upper opening of the herringbone cavity 23 is staggered with the oil inlet 11, the valve is closed, and the oil inlet is stopped immediately.

[0067] When the oil level in the hydraulic oil tank has reached the preset height and the oil level is horizontal, the valve always remains closed;

[0068] When the oil level in the hydraulic oil tank has not reached the preset height, but the oil level is in an undulating state, the float 6 floating on the oil surface is inclined in accordance with the undulating liquid level, that is, the float 6 and the valve body 1 are in a non-parallel state, the folding tube 2 52 is synchronously inclined with the float 6, the interface position of the folding tube 2 52 and the folding tube 1 51 is folded, the folding tube 1 51 and the folding tube 2 52 are swung with the movable shaft 2 54 at the upper and lower ends of the docking inner strip 53 as the axis, the sliding block 515 slides along the limiting slide groove 55 to cooperate with the swing, and the folding tube 1 51 drives the limiting outer tube 3 to swing synchronously, and under the traction of the docking clamp 22 on the top of the tube body 41, the valve core 2 is driven to slide to one side along the valve cavity 12, so that the upper opening of the herringbone cavity 23 is staggered with the oil inlet 11, the valve is closed, and the oil inlet is stopped immediately. After the liquid level returns to a horizontal state, the above operation is repeated, and the oil inlet is stopped again;

[0069] When the oil level in the hydraulic oil tank has reached a preset height and the oil level is in an undulating state, the valve always remains in a closed state regardless of whether the float 6 is tilted or restored to a horizontal state.

[0070] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flow control regulating valve assembly, comprising a valve body (1) mounted on the top end of the inner wall of an oil chamber and a valve core (2) arranged inside the valve body (1), characterized in that: The valve body (1) further comprises a limit outer tube (3), a telescopic outer tube (4) and a telescopic inner tube (5); the limit outer tube (3) is mounted on the lower surface of the valve body (1); the telescopic outer tube (4) is arranged on the inner side of the limit outer tube (3); the top end of the telescopic outer tube (4) is in contact with the bottom surface of the valve core (2); the telescopic inner tube (5) is mounted on the inner side of the telescopic outer tube (4); a float (6) is arranged on the bottom end of the telescopic inner tube (5) extending downward; the telescopic inner tube (5) comprises a folding tube 1 (51), a folding tube 2 (52) and a butt-jointed inner strip plate (53); the folding tube 1 (51) is located on the inner side of the telescopic outer tube (4); The foldable tube (52) is installed at the lower end of the foldable tube (51), the butt-jointed inner strip (53) is arranged between the foldable tube (51) and the foldable tube (52), the float (6) floats on the oil surface inside the oil chamber, the float (6) floats to a preset height in accordance with the horizontal liquid surface and then pushes the valve core (2) to move and close the valve port, the telescopic outer tube (4), the foldable tube (51) and the foldable tube (52) spontaneously adjust the comprehensive length in accordance with the height of the float (6), the float (6) floats on the fluctuating oil surface and then drives the foldable tube (51) and the foldable tube (52) to fold in half, and immediately pushes the valve core (2) to move and close the valve port.

2. A flow control regulating valve assembly according to claim 1, characterized in that: The float (6) is made of stainless steel and has a hollow plate structure. The inner end of the float (6) is aligned with the inner end of the valve body (1).

3. A flow control regulating valve assembly according to claim 1, characterized in that: An oil inlet (11) is provided at the center of the upper surface of the valve body (1), a valve cavity (12) matching the valve core (2) is provided inside the valve body (1), and a movable open groove (13) is provided on the bottom surface of the valve body (1).

4. A flow control regulating valve assembly according to claim 1, characterized in that: Both ends of the butt joint inner strip (53) are provided with movable shaft parts 2 (54), the bottom end of the folding tube 1 (51) and the top end of the folding tube 2 (52) are provided with U-shaped grooves (514), the U-shaped grooves (514) of the folding tube 1 (51) match the outer dimensions of the folding tube 2 (52), the U-shaped grooves (514) of the folding tube 2 (52) match the outer dimensions of the butt joint inner strip (53), one end of the butt joint inner strip (53) is connected through a movable shaft part 2 (54) The inner end of the U-shaped groove (514) of the folding tube (51) is connected to the inner end of the U-shaped groove (514) of the folding tube (51), and a small sliding block (515) is installed on the outer end of the U-shaped groove (514) of the folding tube (51). The other end of the docking inner strip (53) is connected to the inner end of the U-shaped groove (514) of the folding tube (52) through another movable shaft (54). The two outer surfaces of the folding tube (52) are both provided with limited sliding grooves (55), and the small sliding block (515) matches the limited sliding grooves (55).

5. A flow control regulating valve assembly according to claim 1, characterized in that: Both inner side walls of the middle end of the position-limiting outer tube (3) are provided with a movable shaft member 1 (31), and the position-limiting outer tube (3) is connected to the side surface of the telescopic outer tube (4) via the movable shaft member 1 (31).

6. A flow control regulating valve assembly according to claim 4, characterized in that: The telescopic outer tube (4) comprises a tube body (41), a tube cavity (42), a limiting notch (43) and a triangular slot (44); the tube body (41) is located at the lower end of the valve core (2); the tube cavity (42) is arranged inside the tube body (41); the limiting notch (43) is arranged at the bottom end of the tube body (41); the limiting notch (43) matches the folding tube 1 (51); and the triangular slot (44) is arranged at the top end of the tube body (41).

7. A flow control regulating valve assembly according to claim 6, characterized in that: Both side ends of the lower surface of the valve core (2) are provided with butt-jointing clamping strips (22), and the two corners at the top end of the tube body (41) are connected to the inner side of the butt-jointing clamping strips (22).

8. A flow control regulating valve assembly according to claim 6, characterized in that: The folding tube (51) comprises a sliding tube (511), a limiting connecting block (512) and a triangular top block (513); the sliding tube (511) matches the limiting notch (43); the limiting connecting block (512) is arranged on the two side surfaces of the top end of the sliding tube (511); the sliding tube (511) and the limiting connecting block (512) match the tube cavity (42); the triangular top block (513) is installed on the upper surface of the top end of the sliding tube (511); an extrusion groove (21) is provided in the center of the lower surface of the valve core (2); the extrusion groove (21) corresponds to the triangular groove (44); one side surface of the extrusion groove (21) is an inclined slope structure; the width of the inner bottom surface of the extrusion groove (21) matches the sliding tube (511).

9. A flow control regulating valve assembly according to claim 1, characterized in that: The upper surface of the float (6) is provided with a triangular slope (61), and the bottom end of the second folding tube (52) is connected to the upper surface of the triangular slope (61).

10. A valve core suitable for the flow control regulating valve assembly according to any one of claims 1 to 9, characterized in that: A herringbone-shaped cavity (23) is provided inside the valve core (2), and the herringbone-shaped cavity (23) is a three-way structure.

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