Double-control type light-weight low-flow-resistance two-way valve

Abstract

The invention discloses a double-control type light-weight low-flow-resistance two-way valve which comprises a supporting structure, a valve element structure, a filter screen and a mechanical spring. The supporting structure is composed of a valve cover and a shell which are connected through threads. The side wall of the shell is provided with a hollow flow channel; the valve element structure comprises a sealing push valve, a ball valve and a fixing rod and is arranged in an inner cavity of the supporting structure. The left end of the fixing rod is connected with the valve cover, and the right end of the fixing rod is fixed through a nut. A temperature sensing spring, a sealing push valve, a ball valve and a mechanical spring are sequentially arranged on the fixed rod; the sealing push valve is in threaded connection with the ball valve; the inner cavity of the shell and the labyrinth teeth of the sealing push valve form a non-contact labyrinth sealing pair; the middle section structure of the ball valve and the conical sealing surface of the shell form a conical surface sealing pair; and the filter screen is welded at the mounting groove of the shell and covers the fluid inlet. The two-way pressure and temperature control valve realizes two-way pressure and temperature control under light weight and low flow resistance, has good sealing and filtering performance, and is compact in structure and convenient to maintain.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mechanical hydraulic control, and relates to a double-control lightweight low-flow-resistance bidirectional valve. BACKGROUND

[0002] In a mechanical hydraulic system, the "valve-spring" matching structure is the core mechanism for realizing pressure and flow control. This structure matches the opening or closing threshold of the valve required by the system by pre-setting the stiffness and pre-tightening force of the spring. When the actuating force generated by the fluid pressure or flow reaches the pre-set spring force, the valve will act, thereby realizing the on-off, throttling or safety protection functions of the hydraulic circuit. However, the traditional valve structure is assembled from multiple independent components such as a shell, a base, a spring and a sealing element, and the increase in the number of components directly leads to a significant increase in product weight. If the valve is temperature-sensing or pressure-sensing, the structure is even more complex, and the weight problem is particularly prominent. Especially in the field of aviation engine hydraulic modules, which are extremely sensitive to weight, the superposition of multiple components is seriously inconsistent with the current mainstream design requirements of lightweight and integration.

[0003] Secondly, flow resistance control is another major challenge faced by aviation hydraulic systems. The traditional valve structure is prone to high flow resistance, which leads to an increase in circuit pressure loss, thereby reducing the oil supply efficiency of the system and affecting the overall performance. In addition, the traditional valve often faces problems of insufficient filtration capacity and weak sealing reliability during long-term operation. Insufficient filtration can allow contaminants to enter the system, accelerating the wear of components, and poor sealing can cause internal leakage or external leakage. In order to alleviate these problems, it is usually necessary to add an independent filter in series in the system, but this not only further increases the weight and structural complexity of the system, but also increases the flow resistance of the valve, and requires regular maintenance, increasing the use cost and time cost.

[0004] The existing valve technology generally has problems such as relatively large weight, weak filtration, poor sealing, insufficient consideration of flow resistance control, and lack of efficient integrated temperature and pressure control bidirectional valve structure. In view of these deficiencies, it is necessary to explore a new type of double-control lightweight low-resistance valve structure, which aims to effectively reduce weight and flow resistance while improving sealing performance and necessary filtration capacity through innovative integrated design, in order to meet the high requirements of modern hydraulic systems. SUMMARY

[0005] In order to achieve the above purpose, the present application provides a double-control lightweight low-flow-resistance bidirectional valve, which solves the problems of large weight, weak filtration, poor sealing, high flow resistance and lack of efficient integrated bidirectional control function of the existing valve, realizes bidirectional pressure and temperature control under the conditions of lightweight and low flow resistance, and has good sealing and filtration performance, while the structure is compact and easy to maintain.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is a double-control lightweight low-flow-resistance bidirectional valve, comprising a support structure, a valve core structure, a filter screen and a mechanical spring;

[0007] The support structure is internally provided with a cavity, and the side wall of the support structure is provided with a hollow flow channel; the valve core structure is arranged in the internal cavity of the support structure; the filter screen is installed on the side wall of the support structure; and the mechanical spring is arranged on one side of the valve core structure in the axial direction.

[0008] Further, the support structure comprises a valve cover and a shell; the right side of the valve cover is threadedly connected with the left end of the shell;

[0009] The left side of the valve cover is provided with a hexagonal head structure, the end of the hexagonal head structure is threadedly connected with a radiator interface, the inner side end face of the hexagonal head structure of the valve cover is provided with a groove, and a limiting seat is installed in the groove;

[0010] The barrel wall of the shell is provided with a hollow flow channel, the hollow flow channel comprises a slot one and a slot two, and the barrel wall of the shell is provided with a mounting groove, and the filter screen is fixed in the mounting groove.

[0011] Further, the valve core structure comprises a sealing push valve, a ball valve and a fixed rod;

[0012] The left end of the fixed rod is threadedly connected with the valve cover, the fixed rod is sequentially provided with a temperature-sensitive spring, the sealing push valve, the ball valve and the mechanical spring from left to right in the axial direction, and the right end of the fixed rod is threadedly connected with a nut;

[0013] The sealing push valve and the ball valve are fixedly connected through threads.

[0014] Further, the sealing push valve is a two-section integral structure, comprising a disc part at the left end and a T-shaped rod part at the right end, the outer cylindrical surface of the disc part of the sealing push valve is provided with a grid tooth, and the grid tooth and the inner cavity wall of the shell form a non-contact sealing fit;

[0015] The temperature-sensitive spring is arranged between the limiting seat and the T-shaped rod part of the sealing push valve, and the temperature-sensitive spring and the fixed rod are gap-fitted.

[0016] Further, the ball valve has a three-section outer shape structure, comprising an elongated rod part at the left section, a ball head part at the middle section and a short shaft part at the right section, the ball head part at the middle section of the ball valve and the conical sealing surface at the slot two of the side wall of the shell form a sealing fit, and the ball valve and the fixed rod are gap-fitted.

[0017] Further, the left end of the mechanical spring is in contact with the right end face of the ball valve through an adjusting gasket, the right end of the mechanical spring is axially limited by the nut, and the mechanical spring and the fixed rod are gap-fitted.

[0018] The screw nut is locked at the right end of the fixed rod through a split pin;

[0019] The inner wall of the tail cavity of the shell is provided with an annular groove, and an elastic check ring is installed in the groove to limit the ball valve.

[0020] Further, a sealing groove is arranged at the threaded connection between the valve cover and the radiator interface, and a sealing ring I is installed in the sealing groove.

[0021] Further, the filter screen and the shell are fixed as an integral structure through welding; an annular sealing groove is arranged at each end of the joint between the filter screen and the shell cylinder wall, and a sealing ring II is installed in the sealing groove.

[0022] As a simplified embodiment of the technical solution adopted by the present application;

[0023] The support structure comprises a valve cover I; the valve cover I is welded and fixed with the filter screen; the valve core structure comprises a cone valve and a fixed rod I; the right end of the fixed rod I is connected with the valve cover I through threads; the left end of the fixed rod I sequentially penetrates the cone valve and the fixed seat, and is locked and fixed through a screw nut I; a mechanical spring is arranged between the valve cover I and the cone valve; the mechanical spring and the fixed rod I are gap-fitted; the cone valve and the fixed seat are gap-fitted.

[0024] Further, the right end of the valve cover I is connected with the radiator interface through threads, and a sealing groove is arranged at the threaded connection to install a sealing ring I.

[0025] The beneficial effects of the present application are:

[0026] 1. The present application realizes lightweight through a large number of groove designs at the valve cover, and can use a shell-free scheme or only use the filter screen as the shell when necessary, thereby significantly reducing the weight; the flow channel structure is optimized to make the valve have no solid obstacles to flow, thereby realizing low flow resistance characteristics. The valve is designed as a unit body, the valve cover is connected with the valve shell through threads, and the mechanical spring is limited by the fixed rod, the split pin and other components, thereby eliminating the traditional independent limiting device and further simplifying the structure.

[0027] 2. In terms of sealing, the pressure regulating valve adopts a conical sealing structure to reduce the requirement for matching and grinding processing and reduce the processing difficulty; the sealing push valve and the shell adopt a grid seal structure to comprehensively improve the sealing performance. The filter screen integrated in the inlet of the flow channel of the valve cover can effectively intercept excess substances generated due to wear, prevent the movement mechanism from being stuck or blocked, and improve the system working reliability.

[0028] 3. The application is a double-control lightweight low-flow resistance bidirectional structure, which has filtering, pressure regulating and temperature regulating functions, and has a compact structure. The opening pressure can be flexibly adjusted according to actual needs to realize temperature and pressure control. The structure can be converted into a low-weight, low-flow resistance one-way valve by splitting, enhancing the functional adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 is a structural schematic diagram of the present application.

[0031] Figure 2 is a structural schematic diagram of the valve cover and the shell.

[0032] Figure 3 is a structural activity schematic diagram in a low-temperature and low-pressure state.

[0033] Figure 4 is a structural activity schematic diagram in a low-temperature and low-pressure state.

[0034] Figure 5 is a structure schematic diagram of the grid seal.

[0035] Figure 6 is a structure schematic diagram of the split shell pressure valve.

[0036] Figure 7 is a structure activity schematic diagram of the split shell pressure valve.

[0037] In the figure, 1. valve cover, 2. sealing ring I, 3. filter screen, 4. shell, 5. temperature sensing spring, 6. sealing push valve, 7. ball valve, 8. mechanical spring, 9. fixed rod, 10. nut, 11. split pin, 12. adjusting washer, 13. elastic retainer, 14. sealing ring II, 15. limit seat, 16. grid, 17. slot I, 18. slot II, 21. valve cover I, 22. fixed rod I, 23. cone valve, 24. nut I, 25. fixed seat. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0039] The present application provides a double-control lightweight low-flow resistance bidirectional valve, as shown in the drawings, comprising a valve cover 1, a fixed rod 9, the left end of the fixed rod 9 being connected with the main body of the valve cover 1 through threads, a temperature-sensitive spring 5, a sealing push valve 6, a ball valve 7 and a mechanical spring 8 being installed on the fixed rod 9 from left to right in sequence, and the right end of the fixed rod 9 being finally connected with a nut 10 through threads. Figures 1-7

[0040] The left side of the valve cover 1 is provided with a protruding hexagonal head structure for easy disassembly, the end of the hexagonal head structure being processed with external threads for installing the valve as a whole to the radiator interface; a sealing groove is arranged at the threaded connection between the valve cover 1 and the radiator interface for installing a sealing ring 2; a recess is arranged on the inner side end face of the hexagonal head structure of the valve cover 1, the left end face of a limiting seat 15 being embedded in the recess for realizing the axial fixation of the limiting seat 15; the sealing push valve 6 is a two-section integral structure, the left end being a larger-diameter disc part and the right end being a T-shaped rod part; a temperature-sensitive spring 5 is arranged between the limiting seat 15 and the T-shaped rod part of the sealing push valve 6; the left end of the temperature-sensitive spring 5 is installed in the limiting seat 15, and the right end of the temperature-sensitive spring 5 directly acts on the T-shaped rod part of the sealing push valve 6, the movement of the sealing push valve 6 being driven by the expansion and contraction of the temperature-sensitive spring 5; the right side of the main body of the valve cover 1 is provided with internal threads for connecting an outer shell 4.

[0041] The outer shell 4 is a partially hollow cylindrical structure, the cylinder wall of which is provided with a weight-reducing hollow area to realize overall lightweight; an installation groove is arranged on the cylinder wall of the axial middle section of the outer shell 4; a filter screen 3 is arranged at the installation groove and fixedly connected with the outer shell 4 through a welding process to form an integral welded structure covering the fluid inlet; one annular sealing groove is arranged at each end of the joint between the welded structure and the cylinder wall of the outer shell 4, and a sealing ring 14 is installed in the sealing groove; the cylinder wall of the outer shell 4 is further provided with a slot 1 7 and a slot 2 1 8; the outer shell 4 is provided with the slots to further reduce the weight of the component, provide a release channel for the internal pressure and form part of the flow channel, which helps to reduce the flow resistance of the fluid; the left end of the outer shell 4 is provided with external threads for connecting with the valve cover 1.

[0042] ​The ball valve 7 is arranged in the inner cavity of the shell 4; the ball valve 7 has a three-section structure: the left section is an elongated rod part, the middle section is an enlarged ball head part, and the right section is a slightly thick short shaft part; the inner wall of the shell 4 is provided with a tapered sealing surface at the two slotted positions 18, which cooperates with the ball head surface of the middle section of the ball valve 7 to form a tapered sealing pair; and the inner wall of the cavity of the tail extension of the shell 4 is provided with an annular groove for installing the elastic retaining ring 13 for limiting the axial position of the ball valve 7 after being pressed; the ball valve 7 is gap-fitted with the fixed rod 9 through the central hole thereof, and moves axially along the fixed rod 9; the mechanical spring 8 is arranged between the ball valve 7 and the nut 10, and the inner diameter of the mechanical spring 8 is gap-fitted with the fixed rod 9 to achieve radial limiting and guiding; the left end of the mechanical spring 8 provides a closing pre-tightening force to the ball valve 7 through the adjusting washer 12 arranged at the right end surface of the ball head part of the middle section of the ball valve 7; and the right end of the mechanical spring 8 is axially limited by the nut 10 which is inserted and locked by the split pin 11.

[0043] The right side of the T-shaped rod part of the right end of the sealing push valve 6 is provided with an internal thread, which is connected with the external thread of the elongated rod part of the left end of the ball valve 7, so that the two are fixed and synchronously axially moved; the outer cylindrical surface of the disc part of the left end of the sealing push valve 6 is provided with the grate teeth 16 to achieve the sealing effect; during the movement of the sealing push valve 6, the grate teeth 16 are gap-fitted with the inner cavity of the shell 4, and the gap-fitting relationship realizes the sealing function while radially constraining and guiding the axial movement of the sealing push valve 6; when the temperature sensing spring 5 drives the sealing push valve 6 to move rightward to the position where the grate teeth 16 completely block the slotted position one 17 of the side wall of the shell 4, the two form an effective static seal.

[0044] Further, the grate teeth 16 on the outer circular surface of the sealing push valve 6 and the inner cavity of the shell 4 together form a non-contact labyrinth sealing pair; the sealing principle is that the gap between the grate teeth 16 and the cavity wall forms a series of continuous, tortuous and narrow flow channels; when the fluid tries to pass through, it will experience multiple throttling, expansion and vortex dissipation in the flow channel, thereby generating significant flow resistance to inhibit leakage; the non-contact design of the labyrinth sealing pair realizes effective sealing while avoiding the friction required by the contact sealing, ensuring that the sealing push valve 6 can move axially with low resistance and flexibility, and naturally plays a role in radial constraint and guidance during the movement.

[0045] Further, the filter screen 3 is integrated at the fluid inlet slot of the housing 4 and fixed by welding, for filtering impurities in the fluid and preventing the valve movement mechanism from being stuck or blocked due to contaminants. The inner diameter of the temperature sensing spring 5 is in clearance fit with the fixed rod 9, and the fit relationship provides radial guidance and limiting for the expansion and contraction movement of the temperature sensing spring 5. The ball valve 7 is in clearance fit with the fixed rod 9, and the roughness of the fit surface is small. In terms of sealing performance, the labyrinth seal structure 16 is arranged between the sealing push valve 6 and the housing 4, and the conical surface sealing structure is arranged between the ball valve 7 and the housing 4, and the two together with the clearance fit of the ball valve 7 and the fixed rod 9 form a multi-stage sealing structure, which improves the overall sealing reliability of the valve. In terms of connection structure, the valve cover 1 and the housing 4 are connected by screw threads, and the sealing push valve 6 and the ball valve 7 are also connected by screw threads, so that the valve forms a modular unit, which is convenient for disassembly, maintenance and overall replacement. In addition, during assembly, the ball valve 7 is installed in the housing 4, and then the elastic stop ring 13 is used for axial limiting, and the inner diameter of the elastic stop ring 13 is smaller than the maximum outer diameter of the ball valve 7. The temperature sensing spring 5 can also be replaced by a temperature sensing element of a temperature bulb, which further enhances the functional adaptability and configurability of the valve.

[0046] Further, the valve realizes bidirectional sensing and control of fluid temperature and pressure through the cooperation of the temperature sensing spring 5 and the mechanical spring 8. Figure 3 Figure 4 As shown in the low-temperature and low-pressure working condition, the fluid mainly flows in and out through the flow channel formed by the slot 17 on the side wall of the housing 4 and the middle installation slot; in this process, the filter screen 3 integrated at the fluid inlet filters the fluid. When in the low-temperature and high-pressure working condition, when the fluid pressure rises and overcomes the force of the mechanical spring 8, the pressure drives the ball valve 7 and the sealing push valve 6 to move to the right together, compressing the mechanical spring 8, so as to open the pressure relief channel; at this time, the fluid is discharged from the installation slot in the middle of the housing 4 and the slot 18 on the right side, realizing system pressure relief; the filter screen 3 continues to play a filtering role; after the pressure relief is completed, the mechanical spring 8 drives the ball valve 7 and the sealing push valve 6 to reset, and the valve returns to the closed state. In the high-temperature and low-pressure working condition, when the fluid temperature rises to the response threshold of the temperature sensing spring 5, the temperature sensing spring 5 is heated and elongated, and the thrust drives the sealing push valve 6 and the ball valve 7 to move to the right, changes the internal flow channel, and makes the fluid flow out from the slot 18 on the right side of the housing 4; the filter screen 3 ensures that the inflowing fluid is clean; after the temperature decreases, the temperature sensing spring 5 contracts, and at the same time, the mechanical spring 8 drives the ball valve 7 and the sealing push valve 6 to reset. In the high-temperature and high-pressure working condition, the thermal expansion force of the temperature sensing spring 5 and the thrust of the fluid pressure on the ball valve 7 are superimposed, together overcoming the resistance of the mechanical spring 8, so that the valve core assembly moves to the right rapidly and greatly, and the maximum pressure relief or flow channel is opened in time to ensure the safety of the system; the filter screen 3 works throughout to prevent the valve from being stuck; after the working condition returns to normal, the valve resets under the action of the spring. Figure 3 Figure 4 ​​In the drawings, the dotted line is used to indicate the main activity or flow area of the fluid in different states, and the symbol "X" is used to indicate that the corresponding flow channel is in a closed state in this particular state.

[0047] Further, the limit of the mechanical spring 8 of the valve is realized by the combination of the fixing rod 9, the nut 10 and the split pin 11, without the need to design a separate limiting part for the spring, simplifying the structure; by increasing or decreasing the number of adjusting washers 12, the pre-tightening force of the mechanical spring 8 can be flexibly adjusted, so as to accurately set the opening pressure of the valve and adapt to different system pressure requirements; the whole valve adopts a unit body design, facilitating quick overall replacement and maintenance in complex systems such as aircraft engines.

[0048] Further, the number, shape and distribution position of the slots (including but not limited to slot one 17 and slot two 18) on the side wall of the shell 4 can be adaptively adjusted according to the actual flow channel design and fluid in-out requirements. Similarly, the setting position of each sealing ring and the corresponding sealing groove is optimally arranged according to different sealing pressures and medium conditions. The above flexible design features ensure that the valve can adapt to various specific application scenarios.

[0049] The working principle of the present application is as follows:

[0050] In the low temperature and low pressure condition, the fluid enters and exits through the flow channel formed by the slot on the shell 4, and the filter screen 3 integrated at the inlet end plays a filtering role. When the system is in a low temperature and high pressure state, the fluid pressure overcomes the force of the mechanical spring 8, pushes the ball valve 7 and provides guidance and limiting for the movement of the sealing push valve 6, compresses the mechanical spring 8, opens the pressure relief channel, and makes the fluid flow out of the slot of the shell 4; after the pressure returns to normal, the mechanical spring 8 pushes the ball valve 7 and drives the sealing push valve 6 to reset. In the high temperature and low pressure condition, the temperature sensing spring 5 is heated and elongated, directly pushing the sealing push valve 6, so that the linkage components composed of the sealing push valve 6 and the ball valve 7 move to the right, changing the flow channel, and the fluid flows out of the right slot; after the temperature drops, the temperature sensing spring 5 contracts, and at the same time, the mechanical spring 8 elongates, pushing the ball valve 7 and the sealing push valve 6 to reset. When facing extreme conditions of high temperature and high pressure, the thermal driving effect of the temperature sensing spring 5 and the pressure driving effect of the fluid on the ball valve 7 work together to promote the valve to respond quickly and open the pressure relief or flow guide in time. In this process, the sealing structure of the grate 16 provided in the gap fitting section between the sealing push valve 6 and the shell 4, and the tapered surface seal between the ball valve 7 and the shell 4, together ensure the sealing performance of the valve during the action process. The valve cover 1 is connected with the shell 4 through threads, and provides limiting for the mechanical spring 8 through the fixed rod 9, the nut 10 and the split pin 11, the limiting seat 15 provides axial limiting for the sealing push valve 6 and the temperature sensing spring 5, the adjusting washer 12 is used for accurately adjusting the opening pressure of the valve, and the sealing ring (including the sealing ring one 2 and the sealing ring two 14) and the elastic stopper 13 respectively play the roles of static sealing and auxiliary limiting, so that the valve realizes the safety protection functions of filtering, pressure regulating and temperature regulating under various working conditions.

[0051] The functions of each component of the present application: the valve cover 1 is the basic component for connecting the valve with the external heat exchanger, the left end is connected with the heat exchanger interface through external threads, the right end is connected with the shell 4 through internal threads, and static sealing is realized through the sealing ring one 2. The valve cover 1 and the limiting seat 15 jointly define the installation space of the temperature sensing spring 5, and the internal structure jointly defines the movement range of the sealing push valve 6. The fixed rod 9 penetrates the inside of the mechanical spring 8 and provides radial guidance, the two ends of the fixed rod 9 are respectively screwed with the valve cover 1 and the nut 10, and a stable support structure is formed. The nut 10 fixes the right end of the mechanical spring 8 and is locked by the split pin 11, and the pre-tightening force of the mechanical spring 8 can be adjusted by increasing or decreasing the adjusting washer 12. The elastic stopper 13 is installed in the groove of the shell 4 and is used to limit the limit position of the right movement of the ball valve 7. The shell 4 and the filter screen 3 are integrally formed by welding to realize the filtering function of oil impurities.

[0052] Further, the application designs a simplified modular pressure valve scheme, which realizes significant weight reduction under the premise of ensuring core functions through structural integration and valve shell optimization. In this scheme, a more thorough shell-free valve design is conducted: if filtering is required, the filter screen 3 can be used as the main force-bearing structure; if no filtering is required, the valve shell can be completely removed.

[0053] As shown in Figure 6 , the application provides a simplified valve scheme, which significantly reduces flow resistance by removing the physical shell. The simplified valve is mainly composed of a valve cover 21, a sealing ring 2, a filter screen 3, a mechanical spring 8, a fixed rod 22, a cone valve 23, a nut 24, and a fixed seat 25. The connection relationship of the key components continues the design logic of the complete valve: the valve cover 21 is welded with the filter screen 3 to form the core support structure; the right end of the valve cover 21 is provided with external threads for installing the valve as a whole on the corresponding interface of the radiator, and a sealing groove is provided at the threaded connection for installing the sealing ring 2; the right end of the fixed rod 22 is fixedly connected with the valve cover 21 by threads, and the left end of the fixed rod 22 is locked by the nut 24 after passing through the fixed seat 25; the cone valve 23 is gap-fitted with the fixed seat 25 to ensure that the cone valve can move axially flexibly and centrally; the mechanical spring 8 is arranged between the cone valve 23 and the valve cover 21, and the inner diameter of the mechanical spring 8 is gap-fitted with the fixed rod 22 to obtain radial limiting and guiding; the pre-tightening force of the mechanical spring 8 acting on the cone valve 23 is adjusted by adjusting the screwing depth of the threads on the fixed rod 22 or using adjusting washers, so as to set the opening pressure of the valve.

[0054] As shown in Figure 7 , the working principle of the simplified valve is as follows: when the system pressure is too high, the fluid pressure overcomes the pre-tightening force of the mechanical spring 8, pushes the cone valve 23 to move, and opens the pressure relief channel; when the system pressure returns to normal, the spring force pushes the cone valve 23 to reset and close.

[0055] The application provides a simplified valve scheme, which realizes significant weight reduction and flow resistance optimization by removing the complete physical shell. In this scheme, the valve cover 21 is welded with the filter screen 3 to form the core support structure. The mechanical spring 8 is arranged between the cone valve 23 and the valve cover 21, and its pre-tightening force is adjusted by the fixed rod 22, so as to set the opening pressure of the valve. When the system pressure is too high, the fluid pressure directly overcomes the pre-tightening force of the mechanical spring 8, pushes the cone valve 23 to move to open the pressure relief; when the pressure returns to normal, the spring force resets the cone valve 23. This scheme has a simple structure and is suitable for special application scenarios where space is limited or weight and flow resistance are strictly required.

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

[0057] The above only describes the preferred embodiments of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A double-control lightweight low-flow resistance bidirectional valve, comprising a support structure, a valve core structure, a filter screen (3) and a mechanical spring (8), characterized in that, the support structure is internally provided with a cavity, and the side wall of the support structure is provided with a hollow flow channel; the valve core structure is arranged in the internal cavity of the support structure; the filter screen (3) is installed on the side wall of the support structure; and the mechanical spring (8) is arranged on one side of the valve core structure in the axial direction.

2. The double-control lightweight low-flow resistance bidirectional valve according to claim 1, characterized in that, the support structure comprises a valve cover (1) and a shell (4); the right side of the valve cover (1) is threadedly connected with the left end of the shell (4); a hexagonal head structure is arranged on the left side of the valve cover (1), the end of the hexagonal head structure is threadedly connected with a radiator interface, and a recess is arranged on the inner side of the end face of the hexagonal head structure of the valve cover (1), and a limiting seat (15) is installed in the recess; the cylindrical wall of the shell (4) is provided with a hollow flow channel, the hollow flow channel comprises a slot one (17) and a slot two (18), and the cylindrical wall of the shell (4) is provided with a mounting groove, and the filter screen (3) is fixed in the mounting groove.

3. The double-control lightweight low-flow resistance bidirectional valve according to claim 2, characterized in that, the valve core structure comprises a sealing push valve (6), a ball valve (7) and a fixed rod (9); the left end of the fixed rod (9) is threadedly connected with the valve cover (1), the fixed rod (9) is sequentially provided with a temperature-sensitive spring (5), the sealing push valve (6), the ball valve (7) and the mechanical spring (8) in the axial direction from left to right, and the right end of the fixed rod (9) is threadedly connected with a nut (10); the sealing push valve (6) and the ball valve (7) are threadedly fixedly connected.

4. The double-control lightweight low-flow resistance bidirectional valve according to claim 3, characterized in that, the sealing push valve (6) is a two-section integrated structure, comprising a disc part at the left end and a T-shaped rod part at the right end, and a labyrinth (16) is arranged on the outer cylindrical surface of the disc part of the sealing push valve (6), and the labyrinth (16) and the inner cavity wall of the shell (4) form a non-contact sealing fit; the temperature-sensitive spring (5) is arranged between the limiting seat (15) and the T-shaped rod part of the sealing push valve (6), and the temperature-sensitive spring (5) and the fixed rod (9) are gap-fitted.

5. The double-control lightweight low-flow resistance bidirectional valve according to claim 3, characterized in that, the ball valve (7) has a three-section outer shape structure, comprising an elongated rod part at the left section, a ball head part at the middle section and a short shaft part at the right section, the ball head part at the middle section of the ball valve (7) forms a sealing fit with a conical sealing surface at the slot two (18) of the side wall of the shell (4), and the ball valve (7) and the fixed rod (9) are gap-fitted.

6. The double-control lightweight low-flow resistance bidirectional valve according to claim 5, characterized in that, The left end of the mechanical spring (8) is in contact with the right end face of the ball valve (7) through an adjusting gasket (12), and the right end of the mechanical spring (8) is axially limited by a nut (10); and the mechanical spring (8) is in clearance fit with the fixed rod (9); The nut (10) is locked at the right end of the fixed rod (9) by a split pin (11); The tail cavity inner wall of the shell (4) is provided with an annular groove, and an elastic baffle (13) is installed in the groove to limit the ball valve (7).

7. The double-control lightweight low-flow resistance bidirectional valve according to claim 2, wherein, The threaded connection between the valve cover (1) and the radiator interface is provided with a sealing groove, and a sealing ring I (2) is installed in the sealing groove.

8. The double-control lightweight low-flow resistance bidirectional valve according to claim 2, wherein, The filter screen (3) and the shell (4) are fixed as an integral structure by welding; the junction between the filter screen (3) and the shell (4) is provided with an annular sealing groove at each end, and a sealing ring II (14) is installed in the sealing groove.

9. The double-control lightweight low-flow resistance bidirectional valve according to claim 1, wherein, The support structure includes a valve cover I (21); the valve cover I (21) is welded and fixed with the filter screen (3); The valve core structure includes a cone valve (23) and a fixed rod I (22); The right end of the fixed rod I (22) is connected with the valve cover I (21) through threads; the left end of the fixed rod I (22) passes through the cone valve (23) and a fixed seat (25) in sequence, and is locked and fixed by a nut I (24); A mechanical spring (8) is arranged between the valve cover I (21) and the cone valve (23); the mechanical spring (8) is in clearance fit with the fixed rod I (22); The cone valve (23) and the fixed seat (25) are in clearance fit.

10. The double-control lightweight low-flow resistance bidirectional valve according to claim 9, wherein, The right end of the valve cover I (21) is connected with the radiator interface through threads, and the threaded connection is provided with a sealing groove to install a sealing ring I (2).

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