A hydraulic valve block resistant to impacts

Abstract

This invention provides an impact-resistant hydraulic valve block for use in the field of hydraulic valve blocks. The valve block includes a valve block with four ports: B1, A1, B2, and A2. A through-hole valve groove is provided within the valve block, and a valve core sleeve is encapsulated within the groove by two sets of encapsulation mechanisms. The valve groove has four connecting points. The valve core sleeve is rotatably connected within the valve groove. The outer wall of the valve core sleeve has a crescent-shaped groove, and a valve core rod is located within the valve core sleeve. The outer wall of the valve core rod has two spiral opening grooves, and a through hole is provided within the crescent-shaped groove. The encapsulation mechanisms are respectively provided with a P port and a T port. This invention uses a rotating valve core sleeve to adjust the oil circuit direction. Compared with the traditional electromagnetic control method based on axial displacement, the adjustment stroke is small, avoiding the axial displacement effect on the valve core caused by the additional hydraulic shock generated by electromagnetic control. Multi-circuit control is achieved through the rotating valve core sleeve, resulting in a simpler structure and lower maintenance costs.

Description

Technical Field

[0001] This application relates to the field of hydraulic valve blocks, and particularly to an impact-resistant hydraulic valve block. Background Technology

[0002] In hydraulic systems, hydraulic valve blocks are key components that control the direction, pressure, and flow rate of hydraulic oil, and their performance directly affects the stability and reliability of the entire hydraulic system. With the continuous development of industrial technology, the requirements for hydraulic systems are becoming increasingly stringent, especially in high-impact, high-load working environments such as construction machinery and mining equipment, where traditional hydraulic valve blocks face numerous challenges.

[0003] Traditional valve blocks often employ a control method combining the valve block with multiple sets of solenoid valves. This control method involves a large adjustment stroke and a complex structure, increasing not only the cost and size of the equipment but also making disassembly and maintenance difficult. Furthermore, traditional axial displacement solenoid control methods are prone to generating additional hydraulic shocks, causing axial displacement impacts on the control valve core, leading to decreased hydraulic control accuracy and affecting the normal operation of the system. Summary of the Invention

[0004] The purpose of this application is to solve the technical problems of traditional electromagnetically controlled valve blocks having complex structures, poor maintenance convenience, and being susceptible to axial displacement due to oil pressure impact, resulting in a decrease in control accuracy. Compared with the prior art, this application provides an impact-resistant hydraulic valve block, including a valve block with B oil port one, A oil port one, B oil port two, and A oil port two. The valve block has a through valve groove, and a valve core sleeve is encapsulated in the valve groove by two sets of encapsulation mechanisms. B oil port one, A oil port one, B oil port two, and A oil port two are respectively connected to the valve groove, and the four sets of connection points are equidistant in the vertical direction and evenly distributed in the circumferential direction.

[0005] The valve core sleeve is rotatably connected to the valve groove. The outer wall of the valve core sleeve is provided with crescent grooves corresponding to the communication points. The valve core rod is fixed inside the valve core sleeve by an interference groove. The outer wall of the valve core rod is provided with a spiral opening groove 1 and a spiral opening groove 2 arranged in rotational symmetry. The crescent groove is provided with a through hole. The two spaced through holes are connected to the spiral opening groove 1, and the other two spaced through holes are connected to the spiral opening groove 2. The two sets of the encapsulation mechanism are respectively provided with a P oil port connected to the spiral opening groove 1 and a T oil port connected to the spiral opening groove 2.

[0006] The valve block is also equipped with an actuator motor that drives the valve core sleeve to rotate at a fixed angle, and the two sets of encapsulation mechanisms are equipped with an anti-impact mechanism on opposite sides.

[0007] Furthermore, the valve core sleeve has a sealing groove in the middle, and the valve groove has a sealing ring that matches the sealing groove.

[0008] The four crescent-shaped grooves are arranged at equal intervals in the vertical direction and at equal angles in the circumferential direction. Each valve core sleeve has a sealing block on the side away from the crescent-shaped grooves. The four crescent-shaped grooves are arranged in pairs, and an oblique separating ring is provided between the two crescent-shaped grooves in the same group.

[0009] Furthermore, two sets of sealing sleeves are fixedly fitted onto the outer wall of the valve core sleeve. The sealing sleeves have openings corresponding to the crescent grooves. The inner diameter of the sealing sleeves is equal to the outer diameter of the sealing block and the crescent grooves, and the outer diameter of the sealing sleeves is greater than the inner diameter of the valve groove.

[0010] Furthermore, the projections of the two sealing blocks in the same group onto the horizontal plane have overlapping portions;

[0011] The arc length angle of the crescent groove on the circumference is not less than 90°, and the maximum groove width of the crescent groove in the vertical direction is not less than the vertical arrangement spacing of the four sets of connected points.

[0012] Furthermore, the encapsulation mechanism includes a port cover, and the two ends of the valve groove are provided with assembly grooves that mate with the port cover. Each of the two sets of port covers is rotatably connected to a second sealing bearing at one end. The valve core sleeve is rotatably connected between the two sets of second sealing bearings. The impact-resistant mechanism includes a buffer member disposed inside the port cover. One end of the buffer member is rotatably connected to a piston. The port cover is provided with a first sliding cavity that matches the piston. An oil chamber cover is detachably connected to the opening of the first sliding cavity. A drive shaft is rotatably connected inside the oil chamber cover through a first sealing bearing. A spline shaft is fixed at the end of the drive shaft away from the oil chamber cover. The end of the valve core rod is provided with a spline groove corresponding to the spline shaft. A buffer spring is also clamped between the drive shaft and the valve core rod.

[0013] The buffer component has a buffer cone at the end away from the piston, and a sliding cavity corresponding to the buffer cone is provided inside the port cover. The buffer component has a main oil passage, and the drive shaft is rotatably connected inside the buffer component. The end of the main oil passage near the valve core sleeve is connected to several equally spaced branch oil passages.

[0014] Furthermore, the diversion oil channel is a spiral channel, and the output direction of the diversion oil channel is tangential to the circumferential direction of the buffer cone.

[0015] Furthermore, the buffer spring has an elastic force that drives the buffer and the drive shaft away from the valve core sleeve. The valve core rod is provided with an oil passage notch at one end of the spiral opening groove one and the spiral opening groove two that are far apart. The spiral opening groove one and the spiral opening groove two are respectively connected to the corresponding sliding cavity two through the oil passage notch.

[0016] Furthermore, the P oil port and T oil port are respectively set on the corresponding oil chamber cover, and one end of the drive shaft extends through the oil chamber cover and is connected to the output end of the actuator motor for transmission.

[0017] Furthermore, the second sliding cavity is also provided with a filter cover, which includes a mounting ring for fixing to the end of the buffer cone. A conical shell is fixed inside the filter cover, which divides the inside of the filter cover into a discharge chamber, an oil inlet chamber, and a collection chamber. The discharge chamber is a conical cavity, and the collection chamber is a semi-circular cavity. The output end of the diversion oil channel is located in the oil inlet chamber.

[0018] Furthermore, the conical shell is an S-shaped conical elastic shield structure. An elastic node is provided on the side of the conical shell near the collection chamber. The elastic node has an elastic force that drives the conical shell to approach the buffer cone. A filter screen is provided between the discharge chamber and the oil inlet chamber of the conical shell. A filter screen is provided at the discharge end of the discharge chamber.

[0019] Compared to existing technologies, the advantages of this application are:

[0020] This invention utilizes a buffer spring, a buffer component, and a buffer component with a diverting oil channel. When a hydraulic shock occurs, the buffer spring compresses to absorb energy, while simultaneously causing the hydraulic oil to rotate and flow, converting the impact force into the rotational kinetic energy of the buffer cone. This effectively absorbs and buffers the impact energy generated by the hydraulic system.

[0021] Meanwhile, this invention uses a rotary valve core sleeve to adjust the oil circuit direction. Compared with the traditional electromagnetic control method of axial displacement, the adjustment stroke is small, avoiding the influence of additional hydraulic shock caused by electromagnetic control on the axial displacement of the valve core. Multi-oil circuit control is achieved by rotating the valve core sleeve, which makes the structure simpler and the maintenance cost lower. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this application;

[0023] Figure 2 This is a schematic diagram of the bottom structure of this application;

[0024] Figure 3 This is a schematic diagram of the exploded structure of this application;

[0025] Figure 4 This is an exploded view of the packaging mechanism and valve core sleeve proposed in this application;

[0026] Figure 5 This is a perspective view of the internal structure of the valve block proposed in this application;

[0027] Figure 6 This is an exploded structural diagram of the valve core sleeve and its components proposed in this application;

[0028] Figure 7 This is a schematic diagram of the front and back of the valve core sleeve proposed in this application;

[0029] Figure 8 This is a perspective view of the valve core rod structure proposed in this application;

[0030] Figure 9 This is a schematic diagram showing the distribution of the through holes and the connection points of each oil port proposed in this application;

[0031] Figure 10 This is a schematic diagram of the internal structure of the valve block proposed in this application;

[0032] Figure 11 This is a schematic diagram of the cross-sectional structure of the valve block proposed in this application;

[0033] Figure 12 This is an exploded view of the packaging mechanism proposed in this application;

[0034] Figure 13 This is a perspective view of the internal structure of the buffer element proposed in this application;

[0035] Figure 14 This is a schematic diagram of the internal cross-sectional structure of the valve core sleeve proposed in this application;

[0036] Figure 15 This is a cross-sectional structural diagram of this application;

[0037] Figure 16 for Figure 15 Enlarged structural diagram of section A in the middle;

[0038] Figure 17 This is a cross-sectional structural diagram of the buffer and filter cover proposed in this application;

[0039] Figure 18 for Figure 17 A magnified structural diagram of section B.

[0040] Explanation of the labels in the diagram:

[0041] 1. Valve block; 11. Port B1; 12. Port A1; 13. Port B2; 14. Port A2; 15. Valve groove; 16. Sealing ring; 17. Assembly groove; 2. Actuator motor; 3. Encapsulation mechanism; 301. Port P; 302. Port T; 31. Port cover; 311. Slide cavity 1; 312. Slide cavity 2; 32. Oil cavity cover; 321. Sealed bearing 1; 33. Sealed bearing 2; 34. Buffer component; 341. Piston; 342. Buffer cone; 343. Main oil passage; 344. Diverter oil passage; 35. Filter cover; 351. Mounting ring 352. Collection chamber; 353. Oil inlet chamber; 354. Discharge chamber; 3541. Filter screen two; 355. Conical shell; 3551. Filter screen one; 3552. Elastic node; 36. Drive shaft; 361. Splined shaft; 37. Buffer spring; 4. Valve core sleeve; 401. Sealing sleeve; 41. Sealing groove; 42. Crescent groove; 421. Through hole; 43. Blocking block; 44. Angled separator ring; 45. Interference groove; 5. Valve core rod; 501. Oil passage notch; 51. Spiral opening groove one; 52. Spiral opening groove two; 53. Spline groove. Detailed Implementation

[0042] The embodiments will be described clearly and completely with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application. Example

[0043] This invention provides an impact-resistant hydraulic valve block; please refer to [link / reference]. Figures 1-18 It mainly includes a valve block 1, a valve core sleeve 4, a valve core rod 5, a sealing mechanism 3, and an actuator motor 2. The valve block 1 is provided with oil port B-11, oil port A-12, oil port B-213, and oil port A-214. These oil ports are used to connect with other components of the hydraulic system to realize the input and output of hydraulic oil. Specifically, oil port B-11, oil port A-12, oil port B-213, and oil port A-214 correspond to the inlet and outlet oil ports of two sets of hydraulic motors, respectively.

[0044] Please see Figures 1-9 The valve block 1 has a through valve groove 15 inside. The valve core sleeve 4 is encapsulated in the valve groove 15 by two sets of encapsulation mechanisms 3, which improves the convenience of disassembly and maintenance. Oil port 11, oil port 12, oil port 23, and oil port 24 are respectively connected to the valve groove 15, and the four sets of connecting points are equidistant in the vertical direction and evenly distributed at equal angles in the circumferential direction. For details, please refer to the relevant documentation first. Figure 9 In this embodiment, the four sets of connected points, from bottom to top, are connected points of oil port 12, oil port 13, oil port 14, and oil port 11, respectively.

[0045] Please refer to this first. Figures 6-8 The valve core sleeve 4 is rotatably connected to the valve groove 15. Its outer wall is provided with crescent grooves 42 corresponding to the connection points. The valve core sleeve 4 is firmly fixed with the valve core rod 5 through the interference groove 45. The outer wall of the valve core rod 5 is provided with a spiral opening groove 1 51 and a spiral opening groove 2 52 in a rotationally symmetrical manner. The crescent groove 42 is provided with a through hole 421. Two through holes 421 spaced apart are connected to the spiral opening groove 1 51, and the other two through holes 421 spaced apart are connected to the spiral opening groove 2 52.

[0046] Please see Figure 1 and Figure 2 as well as Figure 8 The two sets of encapsulation mechanisms 3 are respectively provided with a P oil port 301 connected to the spiral opening groove 1 51 and a T oil port 302 connected to the spiral opening groove 2 52. Through this structure, the pressure oil enters from the P oil port 301, flows through the spiral opening groove 1 51 and the through hole 421 to the corresponding working oil port; the return oil flows from the working oil port through the through hole 421 and the spiral opening groove 2 52 back to the T oil port 302.

[0047] Please see Figure 6 and Figure 11 The valve core sleeve 4 has a sealing groove 41 in the middle, and a sealing ring 16 matching the sealing groove 41 is provided in the valve groove 15, which effectively prevents hydraulic oil leakage between the valve core sleeve 4 and the valve groove 15 and improves the sealing performance of the valve block 1. The four crescent grooves 42 are arranged equidistantly in the vertical direction and evenly distributed at equal angles in the circumferential direction. The valve core sleeve 4 has a sealing block 43 on the side away from the crescent grooves 42. The four crescent grooves 42 are grouped in pairs, and an oblique separating ring 44 is provided between the two crescent grooves 42 in the same group. The oblique separating ring 44 further optimizes the flow path of the hydraulic oil, reduces the turbulence and pressure fluctuation of the hydraulic oil, and effectively separates the four crescent grooves 42. Combined with the design of the spiral opening groove 1 51 and the spiral opening groove 2 52, please refer to the following first. Figure 9 Taking this embodiment as an example, the four crescent-shaped grooves 42 are arranged from bottom to top in a manner that connects the second spiral opening groove 52, the first spiral opening groove 51, the second spiral opening groove 52, and the first spiral opening groove 51.

[0048] Please see Figure 6 Two sets of sealing sleeves 401 are fixedly fitted on the outer wall of the valve core sleeve 4. The sealing sleeve 401 has an opening corresponding to the crescent groove 42. Its inner diameter is equal to the outer diameter of the sealing block 43 and the crescent groove 42. The outer diameter is larger than the inner diameter of the valve groove 15. The sealing sleeve 401 further enhances the sealing effect and ensures that the hydraulic oil can only flow through the predetermined channel.

[0049] The two sealing blocks 43 in the same group have overlapping projections on the horizontal plane, which allows for a smoother switching of the hydraulic oil flow direction during the rotation of the valve core sleeve 4, reducing impact and vibration. The arc length angle of the crescent groove 42 on the circumference is not less than 90°, and the maximum groove width in the vertical direction is not less than the vertical arrangement spacing of the four sets of connecting points, so that the maximum width of the crescent groove 42 can simultaneously match two sets of adjacent connecting points, ensuring that the hydraulic oil has sufficient channel area during the flow process and reducing flow resistance.

[0050] In specific application scenarios, when two sets of hydraulic motors need to rotate in the same direction, the rotation of the valve core sleeve 4 switches one set of spaced crescent grooves 42 through their respective through holes 421 to connect with the corresponding A oil port 12 and A oil port 2 14, and another set of spaced crescent grooves 42 through their respective through holes 421 to connect with the corresponding B oil port 11 and B oil port 2 13. At this time, the pressure oil of P oil port 301 is guided into the spiral opening groove 51 and discharged through B oil port 11 and B oil port 2 13. At the same time, the hydraulic oil returning from A oil port 12 and A oil port 2 14 flows back to T oil port 302 through spiral opening groove 2 52 to drive the two sets of hydraulic motors to move in the same direction.

[0051] When the two sets of hydraulic motors need to rotate in opposite directions, the rotation of the valve core sleeve 4 switches the opening of the crescent groove 42 connected to the spiral opening groove 51 to be aligned with the connection point of oil port 14 and oil port 11. At the same time, the opening of the crescent groove 42 connected to the spiral opening groove 52 is aligned with the connection point of oil port 12 and oil port 13. At this time, the spiral opening groove 51 provides pressure oil to oil port 14 and oil port 11, and the spiral opening groove 52 provides a return channel to oil port 12 and oil port 13, so as to drive the two sets of hydraulic motors to move in opposite directions.

[0052] When a single hydraulic motor needs to rotate independently, the rotation of the valve core sleeve 4 switches the B port 11 and A port 12 to be blocked by the corresponding blocking block 43, and the A port 2 14 and B port 2 13 connect with the corresponding crescent groove 42 to generate oil circulation.

[0053] This invention uses a rotary valve core sleeve 4 to adjust the oil path and control of the six-channel valve block 1. Compared with the traditional control method that combines valve block structure with multiple sets of solenoid valves, the adjustment stroke is small, the structure is simple, and it is easy to disassemble and maintain. At the same time, it avoids the electromagnetic control method of traditional axial displacement, and there is no additional hydraulic shock to cause axial displacement impact on the control valve core. The hydraulic control accuracy is improved. Through the design of spiral opening groove 1 51, spiral opening groove 2 52 and crescent groove 42, the oil pressure impact on the rotary valve core sleeve 4 is further buffered while controlling the oil path.

[0054] Please see Figures 12-16 The encapsulation mechanism 3 includes a port cover 31. The valve groove 15 has assembly grooves 17 at both ends that cooperate with the port cover 31. The opposite ends of the two sets of port covers 31 are rotatably connected to the sealing bearings 33. The valve core sleeve 4 is rotatably connected between the two sets of sealing bearings 33, ensuring that the valve core sleeve 4 can rotate flexibly while ensuring the sealing of the valve groove 15.

[0055] The impact-resistant mechanism is located on one side opposite to the two sets of encapsulation mechanisms 3, including a buffer 34 located inside the port cover 31. One end of the buffer 34 is rotatably connected to a piston 341. The port cover 31 is provided with a sliding cavity 311 that matches the piston 341. An oil chamber cover 32 is detachably connected to the opening of the sliding cavity 311. A drive shaft 36 is rotatably connected inside the oil chamber cover 32 via a sealed bearing 321. A spline shaft 361 is fixed at the end of the drive shaft 36 away from the oil chamber cover 32. The end of the valve core rod 5 is provided with a spline groove 53 corresponding to the spline shaft 361. A buffer spring 37 is also clamped between the drive shaft 36 and the valve core rod 5.

[0056] The buffer member 34 has a buffer cone 342 at the end away from the piston 341. The port cover 31 has a slide cavity 312 corresponding to the buffer cone 342. The buffer member 34 has a main oil passage 343. The drive shaft 36 is rotatably connected to the buffer member 34. The end of the main oil passage 343 near the valve core sleeve 4 is connected to several equally spaced branch oil passages 344. The branch oil passages 344 are spiral channels. Their output direction is tangential to the circumferential direction of the buffer cone 342, so that the hydraulic oil can form a rotating flow when entering the slide cavity 312, converting the impact force of the hydraulic oil into the rotational kinetic energy of the buffer cone 342, further buffering the hydraulic impact.

[0057] The buffer spring 37 has the elastic force to drive the buffer member 34 and the drive shaft 36 away from the valve core sleeve 4. The valve core rod 5 is provided with an oil passage notch 501 at the ends of the spiral opening groove 1 51 and the spiral opening groove 2 52 that are far apart. The spiral opening groove 1 51 and the spiral opening groove 2 52 are respectively connected to the corresponding slide cavity 2 312 through the oil passage notch 501. When the hydraulic system generates an impact, the buffer member 34 slides in the slide cavity 1 311 under the action of the piston 341, compressing the buffer spring 37 and absorbing the impact energy. At the same time, the hydraulic oil enters the slide cavity 2 312 through the main oil passage 343 to further buffer the impact.

[0058] P port 301 and T port 302 are respectively set on the corresponding oil chamber cover 32 to facilitate the input and output of hydraulic oil. One end of the drive shaft 36 extends through the oil chamber cover 32 and is connected to the output end of the actuator motor 2. The actuator motor 2 is used to drive the valve core sleeve 4 to perform a fixed angle rotation action, thereby realizing the switching of hydraulic oil flow direction.

[0059] Please see Figures 17-18 The slide cavity 312 is also equipped with a filter cover 35. The filter cover 35 includes a mounting ring 351 for fixing to the end of the buffer cone 342. A conical shell 355 is fixed inside the filter cover 35. The conical shell 355 divides the filter cover 35 into a discharge chamber 354, an oil inlet chamber 353 and a collection chamber 352. The discharge chamber 354 is a conical cavity and the collection chamber 352 is a semi-circular cavity. The output end of the diversion oil channel 344 is located in the oil inlet chamber 353. The conical shell 355 is an S-shaped conical elastic cover structure. An elastic node 3552 is provided on the side near the collection chamber 352. The elastic node 3552 has an elastic force to drive the conical shell 355 closer to the buffer cone 342. A filter screen 3551 is provided between the discharge chamber 354 and the oil inlet chamber 353. A filter screen 3541 is provided at the discharge end of the discharge chamber 354.

[0060] The filter hood 35 performs two-stage filtration of hydraulic oil, removing impurities and contaminants. Specifically, when the oil diversion channel 344 outputs into the oil inlet 353, the buffer cone 342 remains rotating during the oil inlet state, and the filter hood 35 rotates accordingly. At this time, the oil in the oil inlet 353 uses centrifugal force to separate large impurities, which are then displaced along the inclined surface of the conical shell 355 to the side of the oil inlet 353. Simultaneously, the centrifugal force of the rotating filter hood 35 and the impact force of the incoming oil cause the filter screen 3551 of the conical shell 355 to displace away from the axis of rotation, driving the elastic node 355. 2. Move away from the buffer cone 342, thereby opening the collection chamber 352 and allowing impurities to enter the collection chamber 352. During the oil inlet process, centrifugal force is always present, so the impurities will be stored in the collection chamber 352. When the oil inlet is finished, the elastic node 3552 resets and closes the collection chamber 352, maintaining the collection effect of impurities. In later maintenance, the filter cover 35 can be directly disassembled or cleaned to remove impurities. Through the design of the filter cover 35, impurities in the hydraulic oil can be effectively separated, avoiding the phenomenon of impurities entering the valve core sleeve 4, causing poor rotation or damage to the seal.

[0061] The hydraulic oil in the oil inlet 353 is filtered by filter screen 3551 and then enters the discharge chamber 354. After secondary filtration by filter screen 3541, it enters the slide cavity 312 and is transported by the oil passage opening 501 to the spiral opening groove 51 or the spiral opening groove 52 to complete the oil supply process, ensuring the cleanliness and normal operation of the hydraulic system.

[0062] This invention utilizes a buffer spring 37, a buffer element 34, and a buffer element 34 with a diverting oil passage 344. When a hydraulic shock occurs, the buffer spring 37 compresses to absorb energy, the buffer element 34 slides within the slide cavity 311, and the diverting oil passage 344 causes the hydraulic oil to rotate, converting the impact force into the rotational kinetic energy of the buffer cone 342. Compared to traditional valve blocks, this invention can effectively absorb and buffer the impact energy generated by the hydraulic system, improving the valve block's impact resistance and reliability. Furthermore, combined with the rotational action of the buffer cone 342, the design of the filter cover 35 achieves two-stage filtration of the hydraulic oil. By utilizing centrifugal force and an elastic structure, impurities in the hydraulic oil can be effectively separated, preventing impurities from entering the valve core sleeve 4 and causing rotational obstruction or seal damage, thus extending the valve block's service life and ensuring the stable operation of the hydraulic system.

[0063] Meanwhile, this invention uses a rotary valve core sleeve 4 to adjust the oil circuit direction. Compared with the traditional electromagnetic control method of axial displacement, the adjustment stroke is small, avoiding the influence of additional hydraulic shock caused by electromagnetic control on the axial displacement of the valve core. Through the crescent groove 42, spiral opening groove one 51 and spiral opening groove two 52 and other structures, the flow direction and flow rate of hydraulic oil can be effectively controlled to meet the needs of high-precision hydraulic systems. Moreover, the valve block structure of this invention abandons the complex structure of combining the traditional valve block with multiple sets of solenoid valves. Multi-oil circuit control is achieved by rotating the valve core sleeve 4, and the structure is simpler. The valve core sleeve 4 is encapsulated in the valve groove 15 by the encapsulation mechanism 3. During disassembly and maintenance, only the port cover 31 and other parts need to be removed to easily inspect and replace the internal components such as the valve core sleeve 4 and valve core rod 5, reducing maintenance costs and equipment downtime.

[0064] The above description is only the best implementation method adopted in this application in combination with current practical needs, but the scope of protection of this application is not limited thereto.

Claims

1. A shock resistant hydraulic valve block characterized by: The valve block (1) includes a valve with oil port 1 (11), oil port 1 (12), oil port 2 (13) and oil port 2 (14). The valve block (1) has a through valve groove (15). The valve groove (15) is encapsulated with a valve core sleeve (4) by two sets of encapsulation mechanisms (3). The oil port 1 (11), oil port 1 (12), oil port 2 (13) and oil port 2 (14) are respectively connected to the valve groove (15). The four sets of connecting points are equidistant in the vertical direction and evenly distributed in the circumferential direction. The valve core sleeve (4) is rotatably connected in the valve groove (15). The outer wall of the valve core sleeve (4) is provided with crescent grooves (42) corresponding to the connecting points. The valve core sleeve (4) is fixed with a valve core rod (5) through an interference groove (45). The outer wall of the valve core rod (5) is provided with a spiral opening groove one (51) and a spiral opening groove two (52) arranged in a rotationally symmetrical manner. The crescent groove (42) is provided with a through hole (421). The two through holes (421) spaced apart are connected to the spiral opening groove one (51). The other two through holes (421) spaced apart are connected to the spiral opening groove two (52). The two sets of encapsulation mechanisms (3) are respectively provided with a P oil port (301) connected to the spiral opening groove one (51) and a T oil port (302) connected to the spiral opening groove two (52). The valve block (1) is also provided with an actuator (2) that drives the valve core sleeve (4) to rotate at a fixed angle. Both sets of the encapsulation mechanisms (3) are provided with an anti-impact mechanism on opposite sides. The encapsulation mechanism (3) includes a port cover (31). The valve groove (15) has mounting grooves (17) at both ends that mate with the port cover (31). Each of the two sets of port covers (31) has a rotatably connected sealing bearing (33) at one end. The valve core sleeve (4) is rotatably connected between the two sets of sealing bearings (33). The impact-resistant mechanism includes a buffer (34) disposed within the port cover (31). One end of the buffer (34) is rotatably connected to a piston (341). The port cover (31) has a mounting groove (17) that mates with the piston. (341) Matching slide cavity one (311), the opening of the slide cavity one (311) is detachably connected to an oil cavity cover (32), the oil cavity cover (32) is rotatably connected to a drive shaft (36) through a sealed bearing one (321), the end of the drive shaft (36) away from the oil cavity cover (32) is fixed with a spline shaft (361), the end of the valve core rod (5) is provided with a spline groove (53) corresponding to the spline shaft (361), and a buffer spring (37) is also clamped between the drive shaft (36) and the valve core rod (5); The buffer (34) has a buffer cone (342) at one end away from the piston (341), and the port cover (31) has a sliding cavity (312) corresponding to the buffer cone (342). The buffer (34) has a main oil passage (343), and the drive shaft (36) is rotatably connected to the buffer (34). The main oil passage (343) is connected to a number of equally spaced branch oil passages (344) at one end near the valve core sleeve (4). The diversion oil passage (344) is a spiral channel, and the output direction of the diversion oil passage (344) is tangential to the circumferential direction of the buffer cone (342). The buffer spring (37) has an elastic force that drives the buffer (34) and the drive shaft (36) away from the valve core sleeve (4). The valve core rod (5) is provided with an oil passage notch (501) at one end of the spiral opening groove one (51) and the spiral opening groove two (52) that are far apart. The spiral opening groove one (51) and the spiral opening groove two (52) are respectively connected to the corresponding sliding cavity two (312) through the oil passage notch (501).

2. A shock-resistant hydraulic valve block according to claim 1, characterized in that The valve core sleeve (4) is provided with a sealing groove (41) in the middle, and a sealing ring (16) matching the sealing groove (41) is provided in the valve groove (15). The four crescent-shaped grooves (42) are arranged at equal intervals in the vertical direction and at equal angles in the circumferential direction. The valve core sleeve (4) is provided with a sealing block (43) on the side away from the crescent-shaped grooves (42). The four crescent-shaped grooves (42) are arranged in pairs, and an oblique separating ring (44) is provided between the two crescent-shaped grooves (42) in the same group.

3. The impact-resistant hydraulic valve block according to claim 2, characterized in that, Two sets of sealing sleeves (401) are fixedly sleeved on the outer wall of the valve core sleeve (4). The sealing sleeve (401) has an opening corresponding to the crescent groove (42). The inner diameter of the sealing sleeve (401) is equal to the outer diameter of the sealing block (43) and the crescent groove (42). The outer diameter of the sealing sleeve (401) is greater than the inner diameter of the valve groove (15).

4. The impact-resistant hydraulic valve block according to claim 2, characterized in that, The two sealing blocks (43) in the same group have overlapping portions in their projections on the horizontal plane; The arc length angle of the crescent groove (42) on the circumference is not less than 90°, and the maximum groove width of the crescent groove (42) in the vertical direction is not less than the vertical arrangement spacing of the four sets of connected points.

5. The impact-resistant hydraulic valve block according to claim 1, characterized in that, The P oil port (301) and T oil port (302) are respectively set on the corresponding oil chamber cover (32), and one end of the drive shaft (36) extends through the oil chamber cover (32) and is connected to the output end of the actuator motor (2) for transmission.

6. The impact-resistant hydraulic valve block according to claim 1, characterized in that, The second sliding cavity (312) is also provided with a filter cover (35). The filter cover (35) includes a mounting ring (351) for fixing to the end of the buffer cone (342). A conical shell (355) is fixed inside the filter cover (35). The conical shell (355) divides the filter cover (35) into a discharge chamber (354), an oil inlet chamber (353), and a collection chamber (352). The discharge chamber (354) is a conical cavity, and the collection chamber (352) is a semi-circular cavity. The output end of the diversion oil channel (344) is located inside the oil inlet chamber (353).

7. The impact-resistant hydraulic valve block according to claim 6, characterized in that, The conical shell (355) has an S-shaped conical elastic cover structure. An elastic node (3552) is provided on the side of the conical shell (355) near the collection chamber (352). The elastic node (3552) has an elastic force that drives the conical shell (355) to approach the buffer cone (342). A filter screen (3551) is provided between the discharge chamber (354) and the oil inlet chamber (353) of the conical shell (355). A filter screen (3541) is provided at the discharge end of the discharge chamber (354).

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