Light hydraulic valve body structure and manufacturing method thereof

Abstract

The invention discloses a light hydraulic valve body structure and a manufacturing method thereof.The structure comprises a valve body, a front flange and a rear flange are installed at the two ends of the valve body, and the valve body and the front flange are of an integrated structure; the first plugging piece and the second plugging piece are mounted at the top and the bottom of the valve body, and honeycomb holes are formed in the first plugging piece and the second plugging piece; the liquid flow channels are formed in the second plugging piece, communicate with the interior of the valve body, are located between the honeycomb holes and are used for slowing down the flow speed of liquid; the valve element assembly is installed in the valve body in an inserted and pulled mode through the rear flange. In the process of assembling the valve body with external equipment, the valve body can bear large applied force, and the problem of oil leakage caused by deformation of the valve hole is avoided; and secondly, the valve body and the front flange are integrally arranged, so that the number of valve holes in the valve body is reduced, and the risk of oil leakage is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic valve manufacturing, and in particular relates to a light hydraulic valve body structure and a manufacturing method thereof. Background Art

[0002] As a key control element in hydraulic systems, hydraulic valves have achieved rapid development in various industries in recent years, and their innovative structural design and manufacturing methods are also constantly improving and upgrading. The structure of hydraulic valves is complex, and its exterior is designed as multiple valve blocks. On the installation surfaces and inside the hydraulic valves, there are many criss-crossing grid channels and holes. The grid channels are arranged outside the hydraulic valves and are connected to the inside of the hydraulic valves through the holes. During the use and installation of the hydraulic valves, when the hydraulic valves are assembled with external equipment or components for use, the gaps between the grid channels on the outside of the hydraulic valves need to be blocked by the cooperation of external equipment and sealing gaskets to prevent the oil from leaking out through the grid channels during use.

[0003] However, in the actual installation process, due to the weak rigidity of the hydraulic valve body material, and in order to ensure the tight connection between the hydraulic valve and the external device, excessive force is easily applied when the hydraulic valve is connected to the external device through the valve hole on the hydraulic valve, causing the valve hole on the hydraulic valve to deform, and eventually leading to oil leakage, which causes great trouble to the normal use and subsequent maintenance of the hydraulic valve. Summary of the invention

[0004] The purpose of the present invention is to provide a lightweight hydraulic valve body structure and a manufacturing method thereof, which, on the one hand, can be used to solve the technical defect that the hydraulic valve in the prior art has too many grid flow channels, which makes it easy for oil leakage to occur when assembled with external equipment; on the other hand, it can be used to solve the technical defect that the rigidity of the main material of the existing hydraulic valve body is weak, which easily causes the valve hole to deform during the assembly process.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, a lightweight hydraulic valve body structure is provided, comprising: A valve body, with a front flange and a rear flange installed at both ends, and the valve body and the front flange are an integral structure; A first blocking member and a second blocking member are installed at the top and bottom of the valve body, and honeycomb holes are formed on the first blocking member and the second blocking member; A liquid flow channel is provided on the second blocking member, communicated with the interior of the valve body, and located between the honeycomb holes, wherein the liquid flow channel is used to slow down the flow rate of the liquid; The valve core assembly is installed inside the valve body by plugging and unplugging through the rear flange.

[0006] Furthermore, the length and width of the front flange are equal to the length and width of the end of the valve body, and there is no gap between the front flange and the valve body.

[0007] Furthermore, the honeycomb holes include first honeycomb holes and second honeycomb holes, the first honeycomb holes are arranged on the first blocking piece, the second honeycomb holes are arranged on the second blocking piece, and the size of the first honeycomb holes is larger than the size of the second honeycomb holes.

[0008] Furthermore, a plurality of the first honeycomb holes are provided, and the plurality of the first honeycomb holes are sequentially spaced apart and arranged in the middle of the first blocking member.

[0009] Furthermore, a plurality of the second honeycomb holes are provided, and the plurality of the second honeycomb holes are respectively arranged at two opposite ends of the second blocking member.

[0010] Furthermore, the cross section of the first honeycomb hole is hexagonal, the side length of the first honeycomb hole is 1.5 mm to 1.7 mm, and the depth is 6 mm to 8 mm.

[0011] Furthermore, the cross section of the second honeycomb hole is also hexagonal, the side length of the second honeycomb hole is 2.5 mm to 2.7 mm, and the depth is 29 mm to 31 mm.

[0012] Further, the liquid flow channel comprises a first liquid flow channel and a second liquid flow channel, the first liquid flow channel and the second liquid flow channel are arranged at an interval, and two first liquid flow channels are provided; Wherein, the first liquid flow channel includes an inclined section and a horizontal section, the inclined section and the horizontal section are an integrated structure, the inclined section is used to slow down the flow rate of the liquid, and the inclined ends of the two first liquid flow channels are arranged to be away from each other.

[0013] Furthermore, a first mounting hole is formed at one end of the valve body close to the rear flange, a second mounting hole is formed on the rear flange, and the first mounting hole and the second mounting hole are axially overlapped; The valve core assembly comprises a valve core, the valve core is a tubular structure, a thread is arranged on the outer side of the valve core, and a side oil port and a bottom oil port are opened in the middle and bottom of the outer side of the valve core; One end of the valve core that opens the bottom oil port passes through the second mounting hole and the first mounting hole in sequence and is screwed to the interior of the valve body.

[0014] In a second aspect, a method for manufacturing a lightweight hydraulic valve body structure is provided, wherein the method is performed using a SLM process and comprises: High-strength aluminum alloy powder with a particle size range of 20~50μm is used to make the valve body and rear flange integrated block structure; The bottom support structure is printed by a printer, the diameter of the printer spot is in the range of 50-100 μm, and the thickness of the powder layer is in the range of 20-80 μm, so that it matches the valve body and the rear flange integrated block structure; After the support is removed from the valve body, stress relief annealing and aging heat treatment are performed.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The valve body can withstand a large applied force during assembly with external equipment, thus avoiding deformation of the valve hole and the occurrence of oil leakage. Secondly, the valve body is integrated with the front flange, which reduces the number of valve holes on the valve body and reduces the risk of oil leakage. At the same time, due to the honeycomb holes, the valve body is lightweight, which improves the performance of internal liquid flow during use and avoids liquid accumulation. Finally, the liquid flow channel reduces the resistance to liquid flow and improves the smoothness of flow.

[0016] 2. Since there is no gap between the front flange and the valve body, this tight connection method greatly improves the sealing performance, which can effectively prevent fluid leakage and ensure normal operation.

[0017] 3. By arranging honeycomb holes of two different sizes on the first blocking member and the second blocking member, the weight of the valve body can be effectively reduced, making the valve body lighter.

[0018] 4. Arranging a plurality of first honeycomb holes on the first blocking member can optimize the strength of the first blocking member, reduce the weight of the valve body, and make the first blocking member more stable and reliable when subjected to external pressure.

[0019] 5. The second honeycomb holes are arranged at both ends of the second plugging member, so that more force can be shared during the assembly of the valve body and the external equipment, thereby reducing the stress on the liquid flow channel and ensuring the reliability of the liquid flow in the liquid flow channel.

[0020] 6. The hexagonal cross-sectional shape enables the first honeycomb hole to disperse stress when subjected to external pressure, reduce stress concentration, help extend the service life of the first plugging component, and improve its reliability under harsh working conditions.

[0021] 7. The hexagonal cross-sectional shape enables the second honeycomb hole to disperse stress when subjected to external pressure, reduce stress concentration, and help extend the service life of the second plugging piece.

[0022] 8. The design of the inclined section effectively slows down the flow rate of the liquid. When the liquid enters the inclined section from a high speed, due to the guidance of the inclined surface, the kinetic energy of the liquid is gradually converted into potential energy, and the flow rate is therefore reduced. The inclined ends of the two first liquid flow channels are set away from each other, which helps to distribute the liquid more evenly at the entrance of the flow channel, reducing the possibility of the liquid directly impacting a single area, thereby improving the uniformity of liquid distribution in the entire flow channel; the smooth transition between the inclined section and the horizontal section reduces the eddy current phenomenon during the liquid flow process. The eddy current not only increases energy loss, but also may cause damage to the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A three-dimensional schematic diagram of the structure of a light hydraulic valve body provided by the present invention; Figure 2 A schematic diagram of a second blocking member in the light hydraulic valve body structure provided by the present invention; Figure 3 A schematic diagram of a valve core assembly in a light hydraulic valve body structure provided by the present invention; Figure 4 A flow chart of a method for manufacturing a light hydraulic valve body structure provided by the present invention; Among them: 1. valve body; 2. front flange; 3. rear flange; 4. valve core; 40. thread; 41. side oil port; 42. bottom oil port; 5. valve cover; 10. first plugging piece; 11. bolt hole; 12. first liquid flow channel; 13. second liquid flow channel; 14. second honeycomb hole; 15. second plugging piece. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] As a key control element in hydraulic systems, hydraulic valves have achieved rapid development in various industries in recent years, and their innovative structural design and manufacturing methods are also constantly improving and upgrading. The structure of hydraulic valves is complex, and its exterior is designed as multiple valve blocks. On the installation surfaces and inside the hydraulic valves, there are many criss-crossing grid channels and holes. The grid channels are arranged outside the hydraulic valves and are connected to the inside of the hydraulic valves through the holes. During the use and installation of the hydraulic valves, when the hydraulic valves are assembled with external equipment or components for use, the gaps between the grid channels on the outside of the hydraulic valves need to be blocked by the cooperation of external equipment and sealing gaskets to prevent the oil from leaking out through the grid channels during use.

[0032] However, in the actual installation process, due to the weak rigidity of the hydraulic valve body material, and in order to ensure the tight connection between the hydraulic valve and the external device, excessive force is easily applied when the hydraulic valve is connected to the external device through the valve hole on the hydraulic valve, causing the valve hole on the hydraulic valve to deform, and eventually leading to oil leakage, which causes great trouble to the normal use and subsequent maintenance of the hydraulic valve. In order to solve the above technical defects, the inventor provides a gear bonding strength and dry running capacity test bench.

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings: like Figure 1-Figure 3 As shown, in the first aspect of the embodiment of the present invention, a lightweight hydraulic valve body structure is provided, including a valve body 1, which is a rectangular structure and is made of high-strength aluminum alloy powder. Compared with a traditional steel liquid valve body, it has more outstanding strength. During the assembly process with external equipment, it can withstand a large applied force, thereby avoiding the problem of oil leakage caused by deformation of the valve hole on the valve body 1; and a front flange 2 and a rear flange 3 are installed at both ends of the valve body 1, and the front flange 2 and the valve body 1 are integrated with each other, which effectively reduces the number of valve holes on the valve body 1 and reduces the risk of oil leakage; a first blocking member 10 and a second blocking member 15 are also installed on the top and bottom of the valve body 1, and the first blocking member 10 and the second blocking member 15 are preferably cover plates, which are used to block the valve body 1 on the one hand and arrange honeycomb holes and liquid flow channels on the other hand. Honeycomb holes are opened on the first blocking member 10 and the second blocking member 15, and the honeycomb holes can be used to achieve a lightweight design of the valve body 1, improve the flow performance of the liquid inside the hydraulic valve body during use, and avoid liquid accumulation. The liquid flow channel is arranged on the second sealing member 15, is connected to the interior of the valve body 1, and is located between the honeycomb holes. The liquid flow channel is used to slow down the flow rate of the liquid to ensure that the liquid can flow smoothly into the interior of the valve body 1; the valve core assembly is installed inside the valve body 1 by plugging and unplugging through the rear flange 3.

[0034] like Figure 1 As shown, since the front flange 2 and the valve body 1 are designed as an integrated whole, the length and width of the front flange 2 are equal to the length and width of the end of the valve body 1, and there is no gap between the front flange 2 and the valve body 1. This tight connection method greatly improves the sealing performance, effectively prevents liquid leakage, and ensures normal operation. Figure 1 and Figure 2 As shown, the honeycomb holes include a first honeycomb hole and a second honeycomb hole 14. The first honeycomb hole is arranged on the first blocking member 10, and the second honeycomb hole 14 is arranged on the second blocking member 15. The size of the first honeycomb hole is larger than the size of the second honeycomb hole 14. By arranging the honeycomb holes of two different sizes on the first blocking member 10 and the second blocking member 15, the weight of the valve body 1 can be effectively reduced, making the valve body 1 more lightweight. Figure 1 and Figure 2 As shown, there are a plurality of first honeycomb holes, which are arranged in four rows. The plurality of first honeycomb holes are arranged in sequence and at intervals in the middle of the first plugging member 10. The cross section of the first honeycomb hole is hexagonal, the side length of the first honeycomb hole is 1.5mm~1.7mm, and the depth is 6mm~8mm. There are also a plurality of second honeycomb holes 14, which are respectively arranged at the opposite ends of the second plugging member 15. The second honeycomb holes 14 on each end are arranged in two rows. The cross section of the second honeycomb holes 14 is also hexagonal, the side length of the second honeycomb holes 14 is 2.5mm~2.7mm, and the depth is 29mm~31mm. During the use of the valve body 1, the hexagonal cross-sectional shape enables the first honeycomb holes and the second honeycomb holes 14 to disperse stress when subjected to external pressure, reduce stress concentration, and help to extend the service life of the first plugging member 10 and the second plugging member 15, and improve their reliability under harsh working conditions. As shown in FIG. Figure 2 As shown, the liquid flow channel includes a first liquid flow channel 12 and a second liquid flow channel 13. As can be seen from the figure, the first liquid flow channel 12 and the second liquid flow channel 13 are arranged at intervals, and there are two first liquid flow channels 12. The structures of the two first liquid flow channels 12 are the same, wherein the first liquid flow channel 12 includes an inclined section and a horizontal section, the inclined section and the horizontal section are an integral structure, the inclined section is used to slow down the flow rate of the liquid, and the inclined ends of the two first liquid flow channels 12 are arranged away from each other, the cross section of the horizontal section is rectangular, and the opposite ends are rounded, so that the liquid can enter the interior of the valve body 1 through the horizontal section at one time after passing through the inclined section. In addition, a bolt hole 11 is also provided above the second liquid flow channel 13. The setting of the bolt hole 11 can make the surface of the external device fit more closely with the surface of the second blocking member 15 during the assembly process of the valve body 1 and the external device, so as to prevent the occurrence of liquid leakage; and the first blocking member 10 is also provided with two bolt holes 11 and a valve cover 5, which further improves the sealing between the first blocking member 10 and the valve body 1 and the external device.

[0035] like Figure 2 and Figure 3 As shown, a first mounting hole is provided at one end of the valve body 1 close to the rear flange 3, and a second mounting hole is provided on the rear flange 3, and the first mounting hole and the second mounting hole are axially overlapped; the valve core assembly includes a valve core 4, the valve core 4 is a tubular structure, a thread 40 is provided on the outer side of the valve core 4, and a side oil port 41 and a bottom oil port 42 are provided in the middle and bottom of the outer side of the valve core 4; one end of the valve core 4 with the bottom oil port 42 passes through the second mounting hole and the first mounting hole in sequence and is screwed to the inside of the valve body 1.

[0036] In a second aspect, this embodiment provides a method for manufacturing a lightweight hydraulic valve body structure, such as Figure 4 As shown, the method is carried out by using the SLM process, and includes: S101. Select high-strength aluminum alloy powder with a particle size range of 20~50μm to make the valve body and rear flange integrated block structure; illustratively, the valve body 1 and front flange 2 integrated block structure are easy to process using the laser cladding SLM process. The material used is high-strength aluminum alloy powder with a powder particle size of 20~50μm, which has the best machinability and a tensile strength of up to 450MPa; then import the final integrated block 3D model into the additive software to evaluate the placement position, angle, printing direction, support addition and other processes.

[0037] S102. Print the bottom support structure through the printer, with the printer spot diameter in the range of 50-100μm and the powder layer thickness in the range of 20-80μm, so that it cooperates with the valve body and the rear flange integrated block structure; for example, considering the characteristic structure at the bottom, place the model flat on the printer, the bottom surface of the valve cover 5 is in contact with the printer, and the bottom support is printed first to facilitate the molding of the overall structure, so that it cooperates with the valve body 1 and the front flange integrated block structure; considering the multi-channel and honeycomb structure, multiple support structure forms are set at the required positions at the same time, that is, support parts are added in a nested manner to ensure the forming quality of the upper surface of the internal channel, and by effectively reducing deformation and increasing heat dissipation measures, the printer spot diameter is in the range of 50-100μm, and the powder layer thickness is in the range of 20-80μm for printing layer by layer.

[0038] S103, after the support is removed from the valve body, stress relief annealing and aging heat treatment are performed; illustratively, stress relief annealing heats the workpiece to a certain temperature (usually below Ac1) to cause local plastic deformation or relaxation inside the material, thereby eliminating the residual stress generated during machining, casting, forging, etc. The dimensional stability of the valve body is improved, deformation and cracking are prevented, and after the residual stress is eliminated, the mechanical properties of the material are improved, such as toughness, ductility and fatigue resistance, which are crucial for the long-term stable operation of the valve body under complex working conditions. Aging heat treatment can adjust the grain size and distribution of the material, further affecting the toughness and plasticity of the material. Through a reasonable aging treatment process, a valve body material with excellent comprehensive performance can be obtained, and finally the hydraulic valve body structure is manufactured.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the invention.

Claims

1. A lightweight hydraulic valve body structure, characterized in that: include: A valve body (1) having a front flange (2) and a rear flange (3) mounted at both ends, wherein the valve body (1) and the front flange (2) are an integral structure; A first blocking member (10) and a second blocking member (15) are mounted on the top and bottom of the valve body (1), and honeycomb holes are formed on the first blocking member (10) and the second blocking member (15); a liquid flow channel, arranged on the second blocking member (15), communicating with the interior of the valve body (1), and located between the honeycomb holes, the liquid flow channel being used to slow down the flow rate of the liquid; The valve core assembly is installed inside the valve body (1) by plugging and unplugging through the rear flange (3).

2. The valve body structure according to claim 1, characterized in that: The length and width of the front flange (2) are equal to the length and width of the end of the valve body (1), and there is no gap between the front flange (2) and the valve body (1).

3. The valve body structure according to claim 1, characterized in that: The honeycomb holes comprise a first honeycomb hole and a second honeycomb hole (14); the first honeycomb hole is arranged on a first blocking member (10); the second honeycomb hole (14) is arranged on a second blocking member (15); and the size of the first honeycomb hole is larger than the size of the second honeycomb hole (14).

4. The valve body structure according to claim 3, characterized in that: A plurality of the first honeycomb holes are provided, and the plurality of the first honeycomb holes are sequentially arranged at intervals in the middle of the first blocking member (10).

5. The valve body structure according to claim 3, characterized in that: A plurality of the second honeycomb holes (14) are also provided, and the plurality of the second honeycomb holes (14) are respectively arranged at two opposite ends of the second blocking member (15).

6. The valve body structure according to claim 3 or 4, characterized in that: The cross section of the first honeycomb hole is hexagonal, the side length of the first honeycomb hole is 1.5 mm to 1.7 mm, and the depth is 6 mm to 8 mm.

7. The valve body structure according to claim 3 or 5, characterized in that: The cross section of the second honeycomb hole (14) is also hexagonal, the side length of the second honeycomb hole (14) is 2.5 mm to 2.7 mm, and the depth is 29 mm to 31 mm.

8. The valve body structure according to claim 1, characterized in that: The liquid flow channel comprises a first liquid flow channel (12) and a second liquid flow channel (13), the first liquid flow channel (12) and the second liquid flow channel (13) are arranged at an interval, and two first liquid flow channels (12) are provided; The first liquid flow channel (12) comprises an inclined section and a horizontal section, the inclined section and the horizontal section are an integrated structure, the inclined section is used to slow down the flow rate of the liquid, and the inclined ends of the two first liquid flow channels (12) are arranged to be opposite to each other.

9. The valve body structure according to claim 1, characterized in that: A first mounting hole is formed at one end of the valve body (1) close to the rear flange (3), and a second mounting hole is formed on the rear flange (3), wherein the first mounting hole and the second mounting hole overlap axially; The valve core assembly comprises a valve core (4), the valve core (4) being a tubular structure, a thread (40) being provided on the outer side of the valve core (4), and a side oil port (41) and a bottom oil port (42) being provided on the middle and bottom of the outer side of the valve core (4); One end of the valve core (4) opening the bottom oil port (42) passes through the second mounting hole and the first mounting hole in sequence and is screwed to the inside of the valve body (1).

10. A method for manufacturing a lightweight hydraulic valve body structure, characterized in that: The method is carried out by using a SLM process, and comprises: High-strength aluminum alloy powder with a particle size range of 20~50μm is used to make the valve body and rear flange integrated block structure; The bottom support structure is printed by a printer, the diameter of the printer spot is in the range of 50-100 μm, and the thickness of the powder layer is in the range of 20-80 μm, so that it matches the valve body and the rear flange integrated block structure; After the support is removed from the valve body, stress relief annealing and aging heat treatment are performed.

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