Valve block for hydraulic control system

Abstract

The valve block for the hydraulic control system comprises a valve block body, a first through hole, a second through hole and a first blind hole are formed in the front face of the valve block, the first through hole comprises a first large-diameter section and a first small-diameter section, the second through hole comprises a second large-diameter section and a second small-diameter section, the second blind hole is formed in the back face of the valve block body, and a third through hole is formed in the top of the valve block body. The third through hole comprises a third large-diameter section, an inclined-diameter section, a threaded section and a third small-diameter section, and the bottom of the third small-diameter section is connected with the first large-diameter section. The valve block body is provided with a plurality of round corners, so that the stress concentration phenomenon at the round corners can be reduced, the strength of the joints is improved, the valve block body is better matched with corresponding parts, friction is reduced, and the service life is prolonged; an oil way in the valve block body is simple, the aluminum alloy die-casting forming technology is adopted, efficiency is high, materials are saved, the machining amount is small, the weight is greatly reduced, the surface of aluminum alloy can be subjected to oxidation treatment, colors are rich, and the corrosion resistance is greatly improved compared with cast iron.

Description

Technical Field

[0001] The utility model relates to the technical field of valve body equipment, in particular to a valve block for a hydraulic control system. Background Art

[0002] A hydraulic valve block is usually composed of a valve block body and various hydraulic valves, pipe joints, accessories and other components installed thereon. The valve block body is a key component of an integrated hydraulic system. It is not only a carrier for installing other hydraulic components but also a channel body for oil passage connection. Installation holes, oil passage holes, connecting screw holes, positioning pin holes, etc. related to hydraulic valves are distributed on the valve block body to ensure correct connection of the holes without interference.

[0003] Currently, conventional valve blocks on the market are cast from cast iron. The internal flow channels of the valve block are prefabricated with sand cores by a core-making mold, and then the made sand cores are installed in a sand casting mold for casting. After casting, the sand cores are removed by processes such as vibration, water flushing, and air blowing, and then mechanical processing is carried out to complete the penetration of the overall flow channels. It has the following disadvantages: the internal flow channels of the valve block are complex, and the sand cores may not be completely removed, resulting in excessive cleanliness; the flow channels made of sand cores have a rough surface, causing a large flow resistance to the liquid and an obvious pressure drop; considering the structural strength and flow resistance of the sand cores, the flow channel design cannot be too small, resulting in a relatively large valve block volume and high weight; it is also difficult to detect after the internal hole machining; the wear resistance of cast iron parts is generally average, and they are brittle and easy to break off, which affects the product life.

[0004] Patent document CN219974991U discloses a hydraulic valve block, which includes a die-cast valve shell. The valve shell has an axially penetrating installation hole, a valve sleeve is inlaid in the installation hole, internal threads are respectively provided at both axial ends of the installation hole, the installation hole includes a first installation hole, a second installation hole, and a third installation hole arranged in sequence along the axial direction. The inner diameters of the first installation hole and the third installation hole are the same, internal threads are provided in the inner holes of both the first installation hole and the third installation hole, the valve sleeve is placed in the second installation hole, and both axial ends of the valve sleeve are positioned by the inner end surfaces of the first installation hole and the third installation hole. This valve block adopts a split structure, which is convenient and fast for processing and manufacturing, and has a relatively low production cost.

[0005] In the above solution, the specific information of this hydraulic valve block is not disclosed. This hydraulic valve block is not properly matched with existing hydraulic valves and pipe joints for installation. Its hole positions cannot be connected to the corresponding components, and its own precision data also cannot meet the requirements of the corresponding components. Therefore, it is necessary to provide a valve block for a hydraulic control system to solve the deficiencies of the existing technology. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the defects existing in the prior art and provide a valve block for a hydraulic control system.

[0007] The technical solution adopted by the present utility model to solve its technical problems is as follows:

[0008] A valve block for a hydraulic control system, comprising a valve block body. On the front of the valve block, there are a first through hole, a second through hole and a first blind hole. The first through hole includes a first thick diameter section and a first thin diameter section. The second through hole includes a second thick diameter section and a second thin diameter section. On the back of the valve block body, there is a second blind hole. On the top of the valve block body, there is a third through hole, which includes a third thick diameter section, an inclined diameter section, a threaded section and a third thin diameter section. The bottom of the third thin diameter section is connected to the first thick diameter section.

[0009] The present utility model is further configured such that a first fillet is provided on the outside of the first thick diameter section, and a second fillet is provided on the inside of the first thick diameter section.

[0010] The present utility model is further configured such that a first chamfer is provided on the outside of the first thin diameter section, and a third fillet is provided on the inside of the first thin diameter section.

[0011] The present utility model is further configured such that a fourth fillet is provided on the outside of the second thick diameter section, and a fifth fillet is provided on the inside of the second thick diameter section.

[0012] The present utility model is further configured such that a sixth fillet is provided at the bottom of the third thick diameter section.

[0013] The present utility model is further configured such that a seventh fillet is provided at the top of the inclined diameter section.

[0014] The present utility model is further configured such that the second blind hole is provided with a first internal thread, and the threaded end is provided with a second internal thread. The first internal thread and the second internal thread are respectively detected by corresponding size thread plug gauges.

[0015] The present utility model is further configured such that the material of the valve block body is aluminum alloy.

[0016] In summary, the present utility model has the following beneficial effects:

[0017] 1. The valve block body of the present utility model is provided with multiple fillets, which can reduce the stress concentration phenomenon here, increase the strength of the connection, better adapt to the corresponding components, reduce friction and improve the service life.

[0018] 2. The internal oil circuit of the valve block body of the present utility model is simple. It adopts the aluminum alloy die-casting forming process, which has high efficiency, saves materials, reduces the processing amount and significantly reduces the weight. The surface of the aluminum alloy can be oxidized, with rich colors and a significant improvement in corrosion resistance compared to cast iron.

[0019] 3. The present utility model adopts a variety of toolings and programmed control during the processing, ensuring its accuracy and consistency, with a high degree of automation, reducing errors and defects, and improving its reliability and life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front structural schematic diagram of the present utility model.

[0021] Figure 2 It is a schematic view of the back structure of the present utility model.

[0022] Figure 3 It is a top view of the present utility model.

[0023] Figure 4 It is the present utility model Figure 1 The sectional view of A-A in it.

[0024] Figure 5 It is the present utility model Figure 2 The sectional view of B-B in it.

[0025] In the figure, 1. valve block body, 2. through hole one, 21. thick diameter section one, 211. fillet one, 212. fillet two, 22. thin diameter section one, 221. chamfer one, 222. fillet three, 3. through hole two, 31. thick diameter section two, 311. fillet four, 312. fillet five, 32. thin diameter section two, 4. blind hole one, 5. blind hole two, 6. through hole three, 61. thick diameter section three, 611. fillet six, 62. inclined diameter section, 621. fillet seven, 63. threaded section, 64. thin diameter section three. Specific embodiments

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0027] Embodiment 1:

[0028] In this embodiment, as Figures 1-5 shown, a valve block for a hydraulic control system proposed by the present utility model includes a valve block body 1. The front of the valve block is provided with a through hole one 2, a through hole two 3 and a blind hole one 4. The through hole one includes a thick diameter section one 21 and a thin diameter section one 22. The through hole two includes a thick diameter section two 31 and a thin diameter section two 32. The back of the valve block body is provided with a blind hole two 5. The top of the valve block body is provided with a through hole three 6. The through hole three includes a thick diameter section three 61, an inclined diameter section 62, a threaded section 63 and a thin diameter section three 64. The bottom of the thin diameter section three is connected to the thick diameter section one.

[0029] In this example, the length, width, and height parameters of the valve block body are 63.5 mm, 40 mm, and 63.5 mm respectively. The parameter of the first thick diameter section is φ27 mm, the parameter of the first thin diameter section is φ18 mm, the parameter of the second thick diameter section is φ12 mm, the parameter of the second thin diameter section is φ7 mm, the parameter of the third thick diameter section is φ25 mm, the parameter of the third thin diameter section is φ12.2 mm, the parameter of the first blind hole is φ6.18 mm, its depth is 12 mm, the internal thread parameter of the second blind hole is M6*1 mm, and its depth is 15 mm.

[0030] In this embodiment, it is further set that a first fillet 211 is provided on the outer side of the first thick diameter section, and a second fillet 212 is provided on the inner side of the first thick diameter section.

[0031] In the present utility model, the first fillet is an external fillet, and the fillet parameter is not greater than R0.5 mm. The second fillet is an internal fillet, and the fillet parameter is not greater than R1.5 mm.

[0032] In this embodiment, it is further set that a first chamfer 221 is provided on the outer side of the first thin diameter section, and a third fillet 222 is provided on the inner side of the first thin diameter section.

[0033] In this example, the angle of the first chamfer is 30 degrees, the radial width of the first chamfer is 1 mm, the third fillet is an external fillet, and the fillet parameter is not greater than R0.25 mm.

[0034] In this embodiment, it is further set that a fourth fillet 311 is provided on the outer side of the second thick diameter section, and a fifth fillet 312 is provided on the inner side of the second thick diameter section.

[0035] In this example, the fourth fillet is an external fillet, and the fillet parameter is not greater than R0.5 mm. The fifth fillet is an internal fillet, and the fillet parameter is not greater than R0.5 mm.

[0036] In this embodiment, it is further set that a sixth fillet 611 is provided at the bottom of the third thick diameter section.

[0037] In this example, the sixth fillet is an internal fillet, and the fillet parameter is not greater than R0.4 mm.

[0038] In this embodiment, it is further set that a seventh fillet 621 is provided at the top of the inclined diameter section.

[0039] In this example, the seventh fillet is an internal fillet, and the fillet parameter is R0.1 - 0.2 mm.

[0040] In this example, the roughness requirement is Ra3.2 μm. The purpose of setting the fillets is to reduce the stress concentration phenomenon here and increase the strength of the connection.

[0041] In this embodiment, it is further set that the second blind hole is provided with a first internal thread, and the threaded end is provided with a second internal thread. The first internal thread and the second internal thread are respectively detected by corresponding size thread plug gauges. The thread plug gauges are existing products and can be directly purchased from the market to ensure that the accuracy and quality of the internal threads meet the standards.

[0042] In this embodiment, it is further set that the valve block body is made of aluminum alloy, and 6061T6 can be selected. The density of the aluminum material is much lower than that of cast iron. Therefore, the aluminum valve block has significant advantages in weight. At the same time, due to its good plasticity, it is easy to process, which can reduce the processing cost; it has good thermal conductivity and can more effectively dissipate the heat generated in the hydraulic system; the surface of the aluminum alloy can be oxidized, with rich colors and a significant improvement in corrosion resistance compared to cast iron.

[0043] Embodiment 2:

[0044] In this embodiment, as Figures 1-5 shown, the difference from Embodiment 1 is that the first fillet can be replaced with a chamfer, and the chamfer parameter is not greater than C0.5mm; the third fillet can be replaced with a chamfer, and the chamfer parameter is not greater than R0.25mm; the fourth fillet can be replaced with a chamfer, and the chamfer parameter is not greater than C0.5mm.

[0045] It should be noted that the valve block body is not allowed to have appearance defects such as bruises, scratches, burrs, and dirt. The cleanliness requirements comply with 1E860: the size of the pollutant particles does not exceed 0.6 * 0.6mm, and the weight of the pollutant particles does not exceed 1mg.

[0046] In the description of the present utility model, it should be noted that when terms indicating the orientation or positional relationship such as "upper", "lower", "inner", "outer", "left", "right", etc. appear, they should be understood as based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present utility model is placed habitually during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model 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, so it cannot be understood as a limitation to the present utility model. In addition, when terms such as "first" and "second" appear, they are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, terms such as "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" 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 an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A valve block for a hydraulic control system, comprising a valve block body, characterized in that, On the front of the valve block, there are through-hole 1, through-hole 2 and blind hole 1. Through-hole 1 includes thick-diameter section 1 and thin-diameter section 1. Through-hole 2 includes thick-diameter section 2 and thin-diameter section 2. On the back of the valve block body, there is blind hole 2. On the top of the valve block body, there is through-hole 3. Through-hole 3 includes thick-diameter section 3, inclined-diameter section, threaded section and thin-diameter section 3. The bottom of thin-diameter section 3 is connected to thick-diameter section 1.

2. The valve block for a hydraulic control system according to claim 1, characterized in that, On the outside of thick-diameter section 1, there is fillet 1. On the inside of thick-diameter section 1, there is fillet 2.

3. The valve block for a hydraulic control system according to claim 1, characterized in that, On the outside of thin-diameter section 1, there is chamfer 1. On the inside of thin-diameter section 1, there is fillet 3.

4. A valve block for a hydraulic control system according to claim 1, characterized in that, On the outside of thick-diameter section 2, there is fillet 4. On the inside of thick-diameter section 2, there is fillet 5.

5. The valve block for a hydraulic control system according to claim 1, characterized in that, At the bottom of thick-diameter section 3, there is fillet 6.

6. The valve block for a hydraulic control system according to claim 1, characterized in that, At the top of the inclined-diameter section, there is fillet 7.

7. The valve block for a hydraulic control system according to claim 1, wherein, Blind hole 2 is provided with internal thread 1, and the threaded end is provided with internal thread 2.

8. The valve block for a hydraulic control system according to claim 1, characterized in that, The material of the valve block body is aluminum alloy.

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