Hydraulic valve

Abstract

The invention discloses a hydraulic valve, and relates to the technical field of valves. The hydraulic valve comprises a valve pipe and a valve element arranged in the valve pipe, a flow channel is arranged between the valve element and the valve pipe, and a valve port structure is arranged on the flow channel. The valve element is provided with a temperature sensing part and a moving part arranged on one side of the temperature sensing part, the moving part is matched with the valve port structure to form a circulation gap communicated with the flow channel, the temperature sensing part has the heat expansion and cold contraction effect, and the moving part moves through expansion or contraction of the temperature sensing part so that the size of the circulation gap can be adjusted. The hydraulic valve adaptively controls the movement of the moving part through the temperature sensing part in the hydraulic valve, so that the size of the circulation gap is controlled, the opening degree of the hydraulic valve is adjusted, and the opening degree of the hydraulic valve can adapt to the temperature of liquid.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to a hydraulic valve. Background Art

[0002] In the fields of aerospace technology, electronic information technology, transportation equipment manufacturing, new energy, rail transit air conditioning, central temperature control, energy storage temperature control, liquid cooling and electronic heat dissipation, cabinet air conditioning, data center integration, cold chain temperature control, indoor air environment control, etc., the hydraulic valve is a key device that is widely used.

[0003] In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art:

[0004] The fixed threshold of the traditional hydraulic valve may not be able to adapt to the temperature changes under different environmental conditions, resulting in inaccurate or unstable temperature control.

[0005] Therefore, how to improve the opening degree of the hydraulic valve to adapt to the temperature of the liquid is a technical problem that those skilled in the art need to solve at present. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a hydraulic valve whose opening degree can adapt to the temperature of the liquid.

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

[0008] A hydraulic valve includes a valve tube and a valve core disposed in the valve tube. There is a flow channel between the valve core and the valve tube, and a valve port structure is provided on the flow channel. The valve core has a temperature sensing part and a moving part disposed on one side of the temperature sensing part. The moving part cooperates with the valve port structure to form a communication gap communicating with the flow channel. The temperature sensing part has a thermal expansion and contraction effect. Through the expansion or contraction of the temperature sensing part, the moving part moves to adjust the size of the communication gap.

[0009] Preferably, the moving part moves along the extending direction of the flow channel.

[0010] Preferably, the valve core further includes a valve. The temperature sensing part and the moving part are connected to the valve. A valve plate is fixedly provided on the valve. The valve plate is located in the flow channel and fixedly connected to the valve tube. A valve plate hole communicating with the flow channel is opened on the valve plate, and the valve port structure is provided on the valve plate.

[0011] Preferably, the first end face of the first end of the valve plate in the extending direction of the valve plate hole is the valve port structure. The moving part and the valve plate hole are respectively located on both sides of the first end face, and the communication gap is formed between the valve port structure and the moving part.

[0012] Preferably, the flow channel is located between the outer peripheral surface of the valve and the inner peripheral surface of the valve tube, and the valve plate is fixed to the outer peripheral surface of the valve; the valve has thermal conductivity, the temperature sensing part is built in the inner cavity of the valve, and the moving part is slidably connected to the inner cavity of the valve.

[0013] Preferably, the valve plate is fixed to the open end of the valve; a part of the structure of the moving part extends out of the inner cavity of the valve, and the flow-through gap is formed between the extended part of the moving part and the valve port structure.

[0014] Preferably, the temperature sensing part includes a working medium arranged in the inner cavity of the valve core, and the working medium has the property of thermal expansion and contraction.

[0015] Preferably, the temperature sensing part further includes a working medium bag arranged in the inner cavity of the valve core. The working medium bag is a thermosensitive expansion bag with the effect of thermal expansion and contraction, and the working medium is built in the working medium bag.

[0016] Preferably, the moving part includes a valve rod and an elastic member. The temperature sensing part and the elastic member are connected to the valve rod, and the elastic force of the elastic member makes the valve rod have a movement tendency to press the temperature sensing part; the flow-through gap is located between the valve rod and the valve port structure.

[0017] Preferably, within the movement range of the moving part, the flow-through gap always remains in a communicating state.

[0018] The hydraulic valve provided by the present invention includes a valve tube and a valve core arranged in the valve tube. There is a flow channel between the valve core and the valve tube, and a valve port structure is provided on the flow channel; the valve core has a temperature sensing part and a moving part arranged on one side of the temperature sensing part. The moving part cooperates with the valve port structure to form a flow-through gap communicating with the flow channel. The temperature sensing part has the effect of thermal expansion and contraction, so that the moving part moves through the expansion or contraction of the temperature sensing part to adjust the size of the flow-through gap.

[0019] The beneficial effects of the hydraulic valve provided by the present invention at least include: the hydraulic valve adaptively controls the movement of the moving part through the temperature sensing part therein, thereby adjusting the size of the flow-through gap and the opening degree of the hydraulic valve, so that the opening degree of the hydraulic valve can adapt to the temperature of the liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0021] Figure 1 Isometric side view of the first specific embodiment of the hydraulic valve provided by the present invention;

[0022] Figure 2 Full-section front view of the first specific embodiment of the hydraulic valve provided by the present invention;

[0023] Figure 3 Schematic diagram of the liquid path when the valve port structure of the first specific embodiment of the hydraulic valve provided by the present invention is at the minimum opening, with the dashed line with an arrow indicating the liquid;

[0024] Figure 4 Schematic diagram of the liquid path when the valve port structure of the first specific embodiment of the hydraulic valve provided by the present invention is at the maximum opening, with the dashed line with an arrow indicating the liquid;

[0025] Figure 5 Valve diagram of the first specific embodiment of the hydraulic valve provided by the present invention;

[0026] Figure 6 Full-section front view of the second specific embodiment of the hydraulic valve provided by the present invention;

[0027] Figure 7 Full-section front view of the third specific embodiment of the hydraulic valve provided by the present invention;

[0028] Figure 8 Isometric side view of the fourth specific embodiment of the hydraulic valve provided by the present invention;

[0029] Figure 9 Full-section front view of the fourth specific embodiment of the hydraulic valve provided by the present invention;

[0030] Figure 10 Schematic diagram of the liquid path when the valve port structure of the fourth specific embodiment of the hydraulic valve provided by the present invention is at the minimum opening, with the dashed line with an arrow indicating the liquid;

[0031] Figure 11 Schematic diagram of the liquid path when the valve port structure of the fourth specific embodiment of the hydraulic valve provided by the present invention is at the maximum opening, with the dashed line with an arrow indicating the liquid;

[0032] Figure 12 Valve diagram of the fourth specific embodiment of the hydraulic valve provided by the present invention;

[0033] Figure 13 Assembly drawing of the valve plate part of the fourth specific embodiment of the hydraulic valve provided by the present invention.

[0034] Reference numerals:

[0035] Valve pipe 1;

[0036] Flow channel 2, flow-through gap 21;

[0037] Spool 3, valve 31, valve plate 311, valve plate hole 3111, first end face 3112, second end face 3113, valve port structure 312, sealing cavity 313, temperature sensing part 32, working fluid bladder 321, working fluid 322, moving part 33, elastic member 331, valve stem 332, valve plug 3321, valve bolt 3322, valve body 3323, spool inner cavity 34. Specific embodiments

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] The core of the present invention is to provide a hydraulic valve whose opening can adapt to the temperature of the liquid.

[0040] The core of the present invention is to provide a specific embodiment of the hydraulic valve. Please refer to Figures 1 to 5 , including a valve tube 1 and a spool 3 disposed within the valve tube 1.

[0041] Among them, the spool 3 can be freely installed according to the needs of the hydraulic valve or system, so as to achieve adjustable and precise control to meet different application requirements, enabling the hydraulic valve to operate stably under various working conditions. In addition, since the spool 3 is directly embedded inside the valve tube 1, no additional space is required to store the spool 3, and the control system can be installed in a limited space. Specifically, all or part of the structure of the spool 3 can be located within the valve tube 1.

[0042] There is a flow channel 2 between the spool 3 and the valve tube 1. The liquid in the flow channel 2 can be water or other liquids. A valve port structure 312 is provided on the flow channel 2. The valve port structure 312 is a structure or position for cooperating with the structure in the spool 3 (specifically the moving part 33) to adjust the opening of the hydraulic valve. It can be a through structure or a structure such as a stop surface relative to which the spool 3 can move. Among them, on the flow channel 2, the position of the valve port structure 312 can be set as needed. For example Figure 2 it is set at the outlet of the flow channel 2, or as Figure 6 in the embodiment, and Figures 8 to 13 in another embodiment of, it is set in the middle of the flow channel 2.

[0043] The spool 3 has a temperature sensing part 32 and a moving part 33 provided on one side of the temperature sensing part 32. The moving part 33 cooperates with the valve port structure 312 to form a flow-through gap 21 communicating with the flow channel 2. The liquid in the flow channel 2 can enter the flow-through gap 21 and then flow out. By adjusting the size of the flow-through gap 21, the flow rate at the outlet of the flow channel 2 can be adjusted, thereby adjusting the opening degree of the hydraulic valve.

[0044] Among them, the temperature sensing part 32 has a thermal expansion and contraction effect. Through the expansion or contraction of the temperature sensing part 32, the moving part 33 moves, changing its relative position with the valve port structure 312 to adjust the size of the flow-through gap 21.

[0045] Among them, as Figure 2 shown, the moving part 33 moves along the extending direction of the flow channel 2, corresponding to Figure 2 the left and right directions in it, so as to make full use of the space inside the valve tube 1. Of course, in other embodiments, the moving part 33 can also move along a direction perpendicular to the extending direction of the flow channel 2, that is, rotate the valve tube 1 in Figure 2 by 90°.

[0046] In this embodiment, the hydraulic valve adaptively controls the movement of the moving part 33 through the temperature sensing part 32 therein, thereby adjusting the size of the flow-through gap 21 and the opening degree of the hydraulic valve, so that the opening degree of the hydraulic valve can adapt to the temperature of the liquid. In addition, since the spool 3 is directly connected to the valve tube 1 and is in direct contact with the liquid, the opening and closing action of the moving part 33 can be made faster, the response speed is faster, directly affecting the flow rate and pressure of the liquid, so that the control of the system is more precise, and it is suitable for application scenarios that require rapid adjustment of the flow rate.

[0047] Regarding the setting of the spool 3, as Figures 2 to 5 shown, the spool 3 further includes a valve 31 connected to the temperature sensing part 32 and the moving part 33. Specifically, the valve 31 and the valve plate 311 are of an integrally formed structure. The valve plate 311 is located in the flow channel 2 and is fixedly connected to the valve tube 1. A valve plate hole 3111 communicating with the flow channel 2 is formed on the valve plate 311 for the liquid in the flow channel 2 to pass through. The valve port structure 312 is provided on the valve plate 311. That is to say, the structure or position of the valve port structure 312 is limited by the spool 3, and the position of the valve port structure 312 can be conveniently adjusted by adjusting the position of the spool 3 in the valve tube 1. Of course, in other embodiments, the outlet of the flow channel 2 can also be directly used as the valve port structure 312 without arranging the valve port structure 312 on a separate structure.

[0048] Among them, as Figure 3 and Figure 4As shown, the first end face 3112 of the first end of the valve plate 311 in the extending direction of the valve plate hole 3111 is the valve port structure 312, which is used to cooperate with the moving part 33 to adjust the opening degree. In addition, the end face of the second end of the valve plate 311 in this direction is the second end face 3113 of the valve plate 311. Among them, the moving part 33 and the valve plate hole 3111 are respectively located on both sides of the first end face 3112, that is to say, the moving part 33 is arranged on the valve plate hole 3111 and does not extend into it. The flow gap 21 is formed between the valve port structure 312 and the moving part 33. The fluid in the flow channel 2 enters the flow gap 21 after passing through the valve plate hole 3111. By adjusting the distance between the moving part 33 and the valve port structure 312 (i.e., the first end face 3112), the size of the flow gap 21 can be adjusted to Figure 3 And Figure 4 Taking the orientation as an example, when the moving part 33 moves, the distance between the moving part 33 and the valve port structure 312 (i.e., the first end face 3112) changes to adjust the flow condition, which is convenient for the processing of the structure. Of course, in other embodiments, the moving part 33 may also have a conical part, and the valve port structure 312 is the hole structure of the valve plate hole 3111. By changing the depth of the conical part extending into the valve plate hole 3111, the size of the flow gap 21 formed between the hole wall of the valve plate hole 3111 and the outer surface of the conical part is correspondingly changed to adjust the flow rate.

[0049] Among them, as Figure 2 shown, the flow channel 2 is located between the outer peripheral surface of the valve 31 and the inner peripheral surface of the valve tube 1. The valve plate 311 is fixedly arranged on the outer peripheral surface of the valve 31. At this time, the valve core 3 is connected to the valve tube 1 through the valve plate 311, which is equivalent to the valve core 3 directly cooperating with the valve tube 1, providing better sealing performance and reducing the leakage risk. At the same time, the temperature sensing part 32 is built into the inner cavity of the valve 31, and the moving part 33 is slidably connected to the inner cavity of the valve 31, so that the deformation direction of the temperature sensing part 32 can be restricted by the valve 31, and it deforms in the movement direction of the moving part 33. Correspondingly, the valve 31 has thermal conductivity, and the valve 31 is specifically selected as a metal material with high thermal conductivity, so that the valve 31 can accurately introduce the temperature of the liquid in the incoming flow channel 2 into the temperature sensing part 32 to achieve effective heat transfer, and effectively realize the introduction of the temperature of the incoming liquid and the absorption of the temperature sensing part 32.

[0050] Among them, as Figure 4 And Figure 5 shown, the valve plate 311 is an annular plate sleeved on the outside of the valve 31, so as to support the valve 31 in the middle of the valve tube 1, so that the outer periphery of the valve 31 can be used for the flow of the liquid in the flow channel 2, increasing the contact area with the temperature sensing part 32. Preferably, a plurality of valve plate holes 3111 are arranged around the valve 31 in sequence. In other embodiments, the valve 31 and the valve plate 311 may also be arranged inside the valve tube 1 in sequence along the direction perpendicular to the extending direction of the flow channel 2.

[0051] Among them, as Figure 2 shown, the valve plate 311 is fixed to the open end of the valve 31, specifically the open end of the inner cavity of the valve 31. A part of the structure of the moving part 33 extends out of the inner cavity of the valve 31, so as to form a flow gap 21 with the valve port structure 312 through this extended part, which is convenient for the setting and adjustment of the flow gap 21. Of course, in other embodiments, the valve plate 311 can also be arranged in the middle of the valve 31. Correspondingly, the extended part of the moving part 33 can also have a cap-shaped structure sleeved outside the valve 31 to cooperate with the valve port structure 312.

[0052] Among them, in the inner cavity of the valve 31, as Figure 2 shown, the temperature sensing part 32 and the moving part 33 can be always attached to each other. In other embodiments, as Figure 7 shown, in order to weaken the stress concentration generated by the pressure and make the thermal expansion and contraction of the temperature sensing part 32 gradual, and further extend the service life of the valve 31, a sealed cavity 313 can be arranged between the temperature sensing part 32 and the moving part 33 in the inner cavity of the valve 31.

[0053] For the setting of the temperature sensing part 32, as Figure 2 shown, it includes a working medium 322 arranged in the valve core inner cavity 34 of the valve core 3. Among them, the valve core inner cavity 34 can specifically be a part of the space of the inner cavity of the valve 31. The working medium 322 has the property of thermal expansion and contraction, so as to correspondingly adjust the size of the valve core inner cavity 34 through the thermal expansion and contraction of the working medium 322, and further move the moving part 33. The valve core inner cavity 34 is surrounded by the structure included in the valve core 3, and can specifically be surrounded by at least part of the structure of the valve 31 and at least part of the structure of the moving part 33.

[0054] Among them, the working medium 322 provides power for the self-adaptive temperature regulating hydraulic valve switch. By adjusting the volume thermal expansion coefficient of the working medium 322 according to the application scenario, different materials can be used, such as rupture fluid, mineral oil or silicone oil, etc., to meet the required performance requirements, and intelligent temperature control and precise adjustment can be realized, so that the hydraulic valve can achieve high-precision operation.

[0055] In this embodiment, the moving part 33 is driven by the working medium 322 with the property of thermal expansion and contraction. The manufacturing is simple, the cost is low, and there is no need for any auxiliary driving device to open and close the moving part 33, making the self-adaptive temperature regulating hydraulic valve body 3323 more compact, smaller in volume and wider in application range.

[0056] Among them, in order to reduce the sealing requirement for the valve core inner cavity 34, as Figure 2As shown, the temperature sensing part 32 further includes a working fluid bladder 321 disposed in the inner cavity 34 of the valve core. The working fluid bladder 321 is a thermosensitive expansion bladder with a thermal expansion and contraction effect, and the working fluid 322 is disposed inside the working fluid bladder 321. The thermosensitive expansion bladder is a material that can achieve dimensional changes through the thermal expansion and contraction phenomenon. Specifically, it is a thermosensitive material with good thermal conductivity, thermal stability, high temperature resistance, corrosion resistance, oil resistance, and solvent resistance, such as polymer-type materials, which can respond immediately to temperature changes within a specific temperature range and cause corresponding dimensional changes. Using the thermosensitive expansion bladder as the working fluid bladder 321 to seal the working fluid 322, when the temperature rises, the thermosensitive expansion bladder will quickly expand and increase in volume, and during the cooling process, the thermosensitive expansion bladder will quickly contract and return to its original size.

[0057] Through the combined application of the thermosensitive expansion bladder and the working fluid 322, the thermosensitive and thermal expansion and contraction effects can be enhanced. The thermosensitive expansion bladder cooperates with the working fluid 322 to achieve the movement of the moving part 33, thereby realizing the adjustment of the hydraulic valve opening. At the same time, through the dual effects of the working fluid 322 and the thermosensitive expansion bladder, the heat from the system is absorbed to achieve the thermal expansion and contraction effect, which not only improves the stability of the movement control of the valve stem 332 but also realizes the precise control of the flow rate and pressure. In addition, the working fluid 322 can be assembled into the valve core 3 in a state of being accommodated in the working fluid bladder 321, which can reduce the assembly difficulty.

[0058] In addition, for the temperature sensing part 32, in other embodiments where the working fluid bladder 321 is cancelled, refer to Figures 8 to 13 , the temperature sensing part 32 only includes the working fluid 322, and the working fluid 322 is directly filled in the inner cavity 34 of the valve core surrounded by at least part of the structure of the valve 31 and at least part of the structure of the moving part 33. Relying on the thermal expansion and contraction of the working fluid 33, the moving part 33 in contact with it is driven to correspondingly control the flow rate and pressure, and the working fluid 322 is accommodated in the inner cavity 34 of the valve core with good sealing performance. At this time, although the sealing requirement for the inner cavity 34 of the valve core is higher than that in the previous embodiment, the number of components can be reduced, and since the barrier between the working fluid 322 and the liquid in the flow channel 2 is also reduced, the liquid in the flow channel 2 can transfer heat to the working fluid 322 more efficiently, which is beneficial to improving the sensitivity of the hydraulic valve.

[0059] Of course, in other embodiments, the temperature sensing part 32 can also directly adopt a solid structure made of the same material as the thermosensitive expansion bladder.

[0060] Regarding the setting of the moving part 33, as Figure 2 shown, it includes a valve stem 332 and an elastic member 331. The elastic member 331 is specifically a spring sleeved on the valve stem 332. The temperature sensing part 32 is connected to the elastic member 331 on the valve stem 332, and the elastic force of the elastic member 331 makes the valve stem 332 have a movement tendency to press the temperature sensing part 32. The flow-through gap 21 is located between the valve stem 332 and the valve port structure 312.

[0061] Due to the addition of the elastic member 331, through the thermal expansion and contraction effects of the working fluid bladder 321 and the working fluid 322 and the elastic force of the elastic member 331, the working fluid bladder 321 and the working fluid 322 can compact the valve stem 332 to gradually open or close the hydraulic valve. When the temperature sensing portion 32 senses a change in the temperature of the incoming fluid, the elastic force of the elastic member 331 will change due to the thermal expansion and contraction effect of the working fluid 322, thereby controlling the opening and closing ratio of the flow gap 21 between the valve port structure 312 and the moving portion 33, achieving precise flow and pressure control, and improving the stability of the valve stem 332 and the precise control of flow and pressure. Of course, in an embodiment without the elastic member 331, the working fluid bladder 321 and the moving portion 33 can be fixedly connected together to ensure that the temperature sensing portion 32 can drive the moving portion 33 to reciprocate.

[0062] Among them, as Figure 2 shown, the valve stem 332 includes a valve plug 3321, a valve bolt 3322, and a valve body 3323. The valve plug 3321 and the valve bolt 3322 are arranged in the inner cavity of the valve 31. The valve 31 and the valve bolt 3322 are sealed and fixedly connected, specifically by threaded connection and sealing, preferably reaching the IP68 protection level. The valve plug 3321 is slidably connected to the inner cavity of the valve 31 and slidably inserted into the valve bolt 3322. The elastic member 331 is disposed in the inner cavity of the valve 31 and sleeved on the valve plug 3321. One end of the valve plug 3321 abuts against the temperature sensing portion 32, and the other end is fixedly connected to the valve body 3323.

[0063] Among them, the part of the moving portion 33 that extends out of the valve 31 to cooperate with the valve port structure 312 to form the flow gap 21 is the valve body 3323. Optionally, the valve body 3323 and the valve plate 311 can be cooperated through an adapted conical surface to reduce resistance.

[0064] For the setting of the opening degree of the hydraulic valve, as Figure 3 shown, within the movement range of the moving portion 33, the flow gap 21 always remains in a connected state. That is to say, there is no zero-flow situation for this hydraulic valve. Even when the relative movement between the moving portion 33 and the valve port structure 312 reaches the minimum opening degree, there is still a minimum flow greater than 0 to ensure that the temperature sensing portion 32 can sense the temperature of the liquid in the flow channel 2, and correspondingly sense the heat of the system where the liquid in the flow channel 2 is located, so as to trigger the self-adaptive thermal expansion and contraction effect of the temperature sensing portion 32 and drive the movement of the moving portion 33, ensuring the normal operation of this self-adaptive temperature regulating hydraulic valve. Among them, when setting the minimum flow, it mainly should meet the liquid flow required for the working fluid bladder 321 and the working fluid 322 to absorb heat.

[0065] The hydraulic valve in this embodiment can be applied to a cooling system and can control the opening degree of the hydraulic valve according to the cooling requirements. Among them, when the opening degree of the hydraulic valve is the smallest, it is not completely closed, the moving part 33 is in a non-working state, the flow rate that can pass through the flow gap 21 is the smallest, the system heat is less, and the cooling requirement is lower. As the system temperature rises, the temperature of the liquid in the flow channel 2 rises, the cooling requirement increases, and the temperature sensing part 32 controls the movement of the moving part 33 through the thermal expansion effect to gradually increase the opening degree of the hydraulic valve, increase the flow rate, and improve the cooling speed until the cooling requirement of the system is met, reaching the maximum flow rate condition to meet the cooling requirement. When the cooling requirement decreases, the temperature sensing part 32 controls the movement of the moving part 33 due to the cold contraction effect to gradually reduce the opening degree of the hydraulic valve. Among them, in order to meet the system cooling requirement, the valve port structure 312 can be optimized according to the requirements of the cooling working condition, and its distribution, shape, size, quantity, and area on the valve plate 311 can be optimized to adapt to the flow rate and pressure requirements under different working conditions to achieve the best system cooling effect.

[0066] The hydraulic valve provided by the present invention is a temperature-sensing thermally-sealed pistonless hydraulic valve. This technology aims to use the working fluid bladder 321 and the working fluid 322 as the core to achieve the thermal expansion and contraction effect under the perception of the heat energy transfer of the system, and drive the movement of the moving part 33. This hydraulic valve not only has the sealing characteristics of a pistonless structure, but also has an intelligent temperature sensing and feedback mechanism, which can automatically adjust the opening and closing state and flow rate control of the flow gap 21, so as to achieve more accurate, stable and reliable temperature control. This hydraulic valve can significantly reduce the temperature control error, improve the flexibility and adaptability of the system, while improving the sealing performance and reliability of the hydraulic valve and extending its service life. In addition, the pistonless sealing design effectively solves the problems of leakage and energy loss existing in traditional hydraulic valves, and further improves the working efficiency and energy utilization rate of the hydraulic valve. This hydraulic valve can achieve a higher level of temperature control accuracy, reduce the complexity and cost of design, production and maintenance, and has the advantages of stronger reliability, pistonless sealing, simple structure, low cost; has a compact design, more stable operation, more energy-saving, small volume, wide application range and versatility, can adapt to the flow rate and pressure requirements under different working conditions and the temperature regulation requirements of different application fields, and achieve the best system cooling effect, etc. At the same time, it improves the overall performance and sustainability of the system, which is of great significance for the optimization and improvement of the hydraulic system and will bring more efficient and reliable temperature control solutions to various application fields.

[0067] It should be noted that when an element is referred to as "fixed" to another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. In addition, in the description of the present invention, unless otherwise specified, the meanings of "a plurality of", "multiple roots", and "multiple groups" are two or more.

[0068] The orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0070] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0071] The above has introduced the hydraulic valve provided by the present invention in detail. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A hydraulic valve, characterized in that, It includes a valve tube (1) and a valve core (3) disposed within the valve tube (1). There is a flow channel (2) between the valve core (3) and the valve tube (1), and a valve port structure (312) is provided on the flow channel (2); the valve core (3) has a temperature sensing portion (32) and a moving portion (33) disposed on one side of the temperature sensing portion (32). The moving portion (33) cooperates with the valve port structure (312) to form a flow-through gap (21) communicating with the flow channel (2). The temperature sensing portion (32) has a thermal expansion and contraction effect. Through the expansion or contraction of the temperature sensing portion (32), the moving portion (33) moves to adjust the size of the flow-through gap (21).

2. The hydraulic valve according to claim 1, characterized in that, The moving portion (33) moves along the extension direction of the flow channel (2).

3. The hydraulic valve according to claim 2, characterized in that, The valve core (3) further includes a valve (31). The temperature sensing portion (32) and the moving portion (33) are connected to the valve (31). A valve plate (311) is fixedly provided on the valve (31). The valve plate (311) is located in the flow channel (2) and is fixedly connected to the valve tube (1). A valve plate hole (3111) communicating with the flow channel (2) is formed on the valve plate (311), and the valve port structure (312) is provided on the valve plate (311).

4. The hydraulic valve according to claim 3, characterized in that, The first end face (3112) of the first end of the valve plate (311) in the extension direction of the valve plate hole (3111) is the valve port structure (312). The moving portion (33) and the valve plate hole (3111) are respectively located on both sides of the first end face (3112), and the flow-through gap (21) is formed between the valve port structure (312) and the moving portion (33).

5. The hydraulic valve according to claim 3, characterized in that, The flow channel (2) is located between the outer peripheral surface of the valve (31) and the inner peripheral surface of the valve tube (1). The valve plate (311) is fixed to the outer peripheral surface of the valve (31); the valve (31) has thermal conductivity. The temperature sensing portion (32) is built into the inner cavity of the valve (31), and the moving portion (33) is slidably connected to the inner cavity of the valve (31).

6. The hydraulic valve according to claim 5, wherein The valve plate (311) is fixed to the open end of the valve (31); a part of the structure of the moving portion (33) extends out of the inner cavity of the valve (31), and the flow-through gap (21) is formed between the extending part of the moving portion (33) and the valve port structure (312).

7. The hydraulic valve according to any one of claims 1 to 6, characterized in that, The temperature sensing portion (32) includes a working medium (322) disposed in the valve core inner cavity (34) of the valve core (3), and the working medium (322) has a thermal expansion and contraction property.

8. The hydraulic valve according to claim 7, characterized in that, The temperature sensing portion (32) further includes a working medium capsule (321) disposed in the valve core inner cavity (34). The working medium capsule (321) is a thermosensitive expansion capsule having a thermal expansion and contraction effect, and the working medium (322) is built into the working medium capsule (321).

9. The hydraulic valve according to any one of claims 1 to 6, characterized in that, The moving part (33) includes a valve stem (332) and an elastic member (331). The temperature sensing part (32) is connected to the elastic member (331) on the valve stem (332), and the elastic force of the elastic member (331) causes the valve stem (332) to have a tendency to press the temperature sensing part (32); the flow gap (21) is located between the valve stem (332) and the valve port structure (312).

10. The hydraulic valve according to any one of claims 1 to 6, characterized in that, Within the movement range of the moving part (33), the flow gap (21) always remains in a communicating state.

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