A hydraulic valve core

Abstract

This utility model relates to the field of hydraulic valve technology and discloses a hydraulic valve core, including a valve body. A valve core assembly is slidably disposed inside the valve body. The valve core assembly includes a valve core body, with a first valve core head fixedly installed at both ends of the valve core body. By setting cleaning components on both sides of the valve core assembly, the first and second cleaning rings slide synchronously with the valve core body, cleaning the inner wall of the valve body in real time, effectively removing impurities, reducing valve core jamming, wear, and leakage risks, and extending the service life of the hydraulic valve. Through the fixing rod, sliding ring, and threaded column of the mounting component, quick assembly and disassembly of the cleaning component and the valve core assembly are achieved. When the cleaning ring wears out, it is not necessary to disassemble the entire valve core; replacement can be completed simply by operating the sliding ring and threaded column, improving maintenance efficiency and reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic valve technology, and in particular to a hydraulic valve core. Background Technology

[0002] The valve core of a hydraulic valve is the core control element of a hydraulic valve. Its performance directly determines the pressure, flow, and directional control accuracy of the hydraulic system. It is a key component for realizing the action control of hydraulic actuators such as cylinders and motors.

[0003] Currently, the hydraulic valve core, as the core control element of the hydraulic system, needs to slide frequently inside the valve body to regulate the direction, pressure, or flow of the oil. However, hydraulic oil often contains metal particles, impurities, or colloids. These contaminants easily adhere to the inner wall of the valve body. With the long-term sliding of the valve core assembly, contaminants accumulate in the mating gap between the valve core and the valve body, causing the valve core to jam, wear to increase, and even damage the sealing performance of the sealing ring, leading to leakage problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a hydraulic valve core.

[0005] This utility model is achieved using the following technical solution: a hydraulic valve core, comprising a valve body, wherein a valve core assembly is slidably disposed inside the valve body, the valve core assembly comprising a valve core body, both ends of the valve core body being fixedly mounted with a first valve core head, a sealing ring being fixedly mounted on the side of the two first valve core heads that are far apart from each other, and a second valve core head being fixedly mounted on the side of the two sealing rings that are far apart from each other. The valve core body is symmetrically provided with cleaning components on both sides, capable of cleaning the inner wall of the valve body when the valve core body slides. Each of the two cleaning components is provided with an installation component capable of quickly installing and removing the cleaning components. Each cleaning component includes a first cleaning ring disposed on one side of the first valve core head, and a second cleaning ring disposed on one side of the second valve core head. The cylindrical surfaces of the first and second cleaning rings are both in contact with the inner wall of the valve body.

[0006] With the above technical solution, when the valve core assembly slides in the valve body, the first cleaning ring and the second cleaning ring move synchronously with the valve core body. Their cylindrical surfaces that fit against the inner wall of the valve body can scrape away impurities and contaminants attached to the inner wall in real time, preventing impurities from entering the mating gap between the valve core and the valve body, and reducing the risk of jamming and wear. At the same time, the sealing ring can prevent oil leakage and ensure the sealing of the hydraulic system. The synchronous movement of the cleaning components and the valve core assembly does not require additional power to drive the cleaning action.

[0007] As a further improvement to the above solution, the installation assembly includes a first fixing ring on one side of the first cleaning ring and a second fixing ring on one side of the second cleaning ring. A plurality of fixing rods are fixedly installed on the side of the first fixing ring near the second fixing ring. One end of each fixing rod passes through the adjacent first cleaning ring, first valve core head, sealing ring, second valve core head, second cleaning ring, and second fixing ring in sequence.

[0008] Through the above technical solution, the fixing rod can sequentially connect and fix the first fixing ring, the first cleaning ring, the first valve core head, the sealing ring, the second valve core head, the second cleaning ring, and the second fixing ring to form a stable assembly, ensuring that the cleaning component and the valve core component move synchronously, preventing the cleaning ring from shifting or falling off during the sliding process, and providing basic structural support for subsequent quick disassembly and assembly.

[0009] As a further improvement to the above solution, a limiting groove is provided on the side of the first cleaning ring and the second cleaning ring that are far apart, and the first fixing ring and the second fixing ring are both located inside the adjacent limiting groove.

[0010] Through the above technical solution, the limiting groove can radially limit the first and second fixed rings, prevent the fixed rings from shifting during assembly or use, ensure uniform force on the fixed rod, and avoid uneven gap between the cleaning ring and the inner wall of the valve body due to the offset of the fixed ring, which would affect the cleaning effect.

[0011] As a further improvement to the above solution, a sliding groove with an annular arrangement is provided on one side of the second fixing ring, and a sliding ring is slidably installed inside the sliding groove. The sliding groove is I-shaped, and a fixing opening is provided on the cylindrical surface of each fixing rod that passes through one end of the second fixing ring. The cylindrical surface of the sliding ring located outside the sliding groove extends outward to the fixing opening of multiple fixing rods.

[0012] Through the above technical solution, the I-shaped sliding groove can limit the axial displacement of the sliding ring, ensuring that the sliding ring can only slide along the circular trajectory; when the extension of the sliding ring is embedded in the fixing port of the fixing rod, the fixing rod can be axially locked to prevent the fixing rod from coming out of the second fixing ring and to ensure the stability of the assembly structure; during disassembly, it is only necessary to slide the sliding ring to make the extension part disengage from the fixing port to release the locking of the fixing rod and achieve quick disassembly.

[0013] As a further improvement to the above solution, the sliding ring has multiple movable openings on its cylindrical surface outside the sliding groove that are adapted to the fixed rod.

[0014] With the above technical solution, the fixed rod is limited by the extension of the sliding ring inside the fixed opening. When the sliding ring rotates, the movable opening rotates to coincide with the fixed rod. In this way, the position of the fixed rod is not restricted by the extension of the sliding ring. The extension has a gap due to the movable opening, which allows the fixed rod to slide and separate from the second fixed ring.

[0015] As a further improvement to the above solution, a threaded groove is provided on one side of the second fixing ring, and a threaded post is threaded inside the threaded groove. A rotating block is fixedly installed at one end of the threaded post, and the threaded post is located inside one of the movable openings.

[0016] Through the above technical solution, rotating the rotating block can drive the threaded column to move axially along the threaded groove. When the threaded column presses against the inner wall of the sliding ring's movable opening, it can lock the sliding ring, preventing the sliding ring from sliding due to vibration or oil impact during valve core operation, thus causing the fixing rod to unlock. When disassembling, rotating the rotating block in the opposite direction can disengage the threaded column from the sliding ring, thereby releasing the restriction on the sliding ring, making the operation convenient.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention features cleaning components on both sides of the valve core assembly. The first and second cleaning rings slide synchronously with the valve core body, cleaning the inner wall of the valve body in real time, effectively removing impurities, reducing valve core jamming, wear, and leakage risks, and extending the service life of the hydraulic valve. Through the fixing rod, sliding ring, and threaded column of the mounting components, quick assembly and disassembly of the cleaning components and valve core assembly are achieved. When the cleaning ring wears out, the entire valve core does not need to be disassembled; replacement can be completed simply by operating the sliding ring and threaded column, improving maintenance efficiency and reducing maintenance costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal structure of the valve body of this utility model;

[0020] Figure 2 This is a schematic diagram of the valve body structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the present invention with cleaning components;

[0022] Figure 4 This is a cross-sectional structural diagram of the cleaning component and the installation component of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the present invention with a limiting groove;

[0024] Figure 6 This utility model Figure 4 Enlarged view of the structure of part A.

[0025] Explanation of key symbols:

[0026] 1. Valve body; 201. Valve core body; 202. First valve core head; 203. Sealing ring; 204. Second valve core head; 301. First cleaning ring; 302. Second cleaning ring; 401. First fixing ring; 402. Second fixing ring; 403. Fixing rod; 5. Limiting groove; 6. Sliding groove; 7. Sliding ring; 8. Fixing port; 9. Threaded column; 10. Rotating block. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] Please combine Figures 1-6 This embodiment of a hydraulic valve core includes a valve body 1. A valve core assembly is slidably disposed inside the valve body 1. The valve core assembly includes a valve core body 201. A first valve core head 202 is fixedly installed at both ends of the valve core body 201. A sealing ring 203 is fixedly installed on the side of the two first valve core heads 202 that are far apart from each other. A second valve core head 204 is fixedly installed on the side of the two sealing rings 203 that are far apart from each other. Cleaning components that can clean the inner wall of the valve body 1 when the valve core body 201 slides are symmetrically provided on both sides of the valve core body 201. Both cleaning components are provided with mounting components that can quickly install and remove the cleaning components.

[0029] The cleaning assembly includes a first cleaning ring 301 disposed on one side of the first valve core head 202 and a second cleaning ring 302 disposed on one side of the second valve core head 204. The cylindrical surfaces of the first cleaning ring 301 and the second cleaning ring 302 are both in contact with the inner wall of the valve body 1.

[0030] When the valve core assembly slides within the valve body 1, the first cleaning ring 301 and the second cleaning ring 302 move synchronously with the valve core body 201. Their cylindrical surfaces, which are in contact with the inner wall of the valve body 1, can scrape away impurities and contaminants attached to the inner wall in real time, preventing impurities from entering the mating gap between the valve core and the valve body 1 and reducing the risk of jamming and wear. At the same time, the sealing ring 203 can prevent oil leakage and ensure the sealing of the hydraulic system. The synchronous movement of the cleaning components and the valve core assembly does not require additional power to drive the cleaning action.

[0031] The mounting assembly includes a first fixing ring 401 on one side of the first cleaning ring 301 and a second fixing ring 402 on one side of the second cleaning ring 302. A plurality of fixing rods 403 are fixedly installed on the side of the first fixing ring 401 near the second fixing ring 402. One end of each fixing rod 403 passes through the adjacent first cleaning ring 301, first valve core head 202, sealing ring 203, second valve core head 204, second cleaning ring 302, and second fixing ring 402 in sequence.

[0032] The fixing rod 403 can sequentially connect and fix the first fixing ring 401, the first cleaning ring 301, the first valve core head 202, the sealing ring 203, the second valve core head 204, the second cleaning ring 302, and the second fixing ring 402 to form a stable assembly, ensuring that the cleaning component and the valve core component move synchronously, preventing the cleaning ring from shifting or falling off during the sliding process, and providing basic structural support for subsequent quick disassembly and assembly.

[0033] Limiting grooves 5 are provided on the side of the first cleaning ring 301 and the second cleaning ring 302 that are far apart from each other, and the first fixing ring 401 and the second fixing ring 402 are both located inside the adjacent limiting grooves 5.

[0034] The limiting groove 5 can radially limit the first fixing ring 401 and the second fixing ring 402 to prevent the fixing ring from shifting during assembly or use, ensure that the fixing rod 403 is subjected to uniform force, and avoid uneven contact between the cleaning ring and the inner wall of the valve body 1 due to the offset of the fixing ring, which would affect the cleaning effect.

[0035] A sliding groove 6 in an annular configuration is provided on one side of the second fixing ring 402. A sliding ring 7 is slidably installed inside the sliding groove 6. The sliding groove 6 is I-shaped. A fixing opening 8 is provided on the cylindrical surface of each fixing rod 403 that passes through one end of the second fixing ring 402. The cylindrical surface of the sliding ring 7 located outside the sliding groove 6 extends outward to the fixing opening 8 of multiple fixing rods 403.

[0036] The I-shaped sliding groove 6 can limit the axial displacement of the sliding ring 7, ensuring that the sliding ring 7 can only slide along the annular trajectory; when the extension of the sliding ring 7 is embedded in the fixing port 8 of the fixing rod 403, the fixing rod 403 can be axially locked to prevent the fixing rod 403 from coming out of the second fixing ring 402, thus ensuring the stability of the assembly structure; during disassembly, simply slide the sliding ring 7 to disengage the extension from the fixing port 8 to release the locking of the fixing rod 403, thus achieving quick disassembly.

[0037] The sliding ring 7 has multiple movable openings on its cylindrical surface outside the sliding groove 6 that are adapted to the fixed rod 403.

[0038] The fixed rod 403 is locked inside the fixed opening 8 by the extension of the sliding ring 7. When the sliding ring 7 rotates, the movable opening rotates to the part that overlaps with the fixed rod 403. In this way, the position of the fixed rod 403 is no longer restricted by the extension of the sliding ring 7. The extension has a gap due to the movable opening, which allows the fixed rod 403 to slide and separate from the second fixed ring 402.

[0039] The second fixed ring 402 has a threaded groove on one side, and a threaded post 9 is threaded inside the threaded groove. A rotating block 10 is fixedly installed at one end of the threaded post 9, and the threaded post 9 is located inside one of the movable openings.

[0040] Rotating the rotating block 10 can drive the threaded column 9 to move axially along the threaded groove. When the threaded column 9 presses against the inner wall of the movable opening of the sliding ring 7, the sliding ring 7 can be locked to prevent the sliding ring 7 from sliding due to vibration or oil impact during the operation of the valve core, which would cause the fixing rod 403 to unlock. When disassembling, rotating the rotating block 10 in the opposite direction will cause the threaded column 9 to disengage from the sliding ring 7, thereby releasing the restriction on the sliding ring 7. The operation is convenient.

[0041] The implementation principle of a hydraulic valve core in this application embodiment is as follows: First, the first cleaning ring 301 is attached to one side of the first valve core head 202, and the second cleaning ring 302 is attached to one side of the second valve core head 204, aligning the through path of the fixing rod 403.

[0042] Then, the fixing rod 403 on the first fixing ring 401 is aligned with multiple through paths and inserted sequentially through the first cleaning ring 301, the first valve core head 202, the sealing ring 203, the second valve core head 204, and the second cleaning ring 302. Then, the first fixing ring 401 is placed into the limiting groove 5 of the first cleaning ring 301. Next, the sliding ring 7 is rotated so that the movable opening of the sliding ring 7 is aligned with the through paths, ensuring that the fixing rod 403 passes smoothly through the movable opening. Then, the second fixing ring 402 is aligned with multiple fixing rods 403 and placed into the limiting groove 5 of the second cleaning ring 302, ensuring that the fixing ring fits into the limiting groove 5, thus completing the pre-positioning of the fixing ring and the cleaning ring.

[0043] When the fixing port 8 of the fixing rod 403 is fully exposed to the second fixing ring 402, the sliding ring 7 is slid in the opposite direction so that the extension of the sliding ring 7 outside the sliding groove 6 is embedded in the fixing port 8 of the fixing rod 403, thus completing the axial locking of the fixing rod 403.

[0044] Finally, rotate the rotating block 10 to drive the threaded column 9 to move axially along the threaded groove of the second fixed ring 402 until the threaded column 9 presses against the inner wall of the movable opening of the sliding ring 7, restricting the circumferential rotation of the sliding ring 7. This completes the assembly of the cleaning component and the valve core component. Place the assembled whole into the valve body 1 to realize the installation of the valve core.

[0045] When the hydraulic system drives the valve core assembly to work, the valve core body 201 slides axially inside the valve body 1, and the valve core body 201 drives the first valve core head 202, the sealing ring 203, and the second valve core head 204 at both ends to slide synchronously.

[0046] The second valve core head 204 drives the second cleaning ring 302 to slide, and the first valve core head 202 drives the first cleaning ring 301 to slide. Since the cylindrical surfaces of the first cleaning ring 301 and the second cleaning ring 302 are in close contact with the inner wall of the valve body 1, the cleaning ring can scrape off metal particles, impurities and other contaminants attached to the inner wall of the valve body 1 in real time during the sliding process, preventing contaminants from entering the fitting gap between the valve core and the valve body 1.

[0047] When the first cleaning ring 301 or the second cleaning ring 302 is worn and needs to be replaced, first remove the valve core assembly from the valve body 1;

[0048] Rotate the rotating block 10 to make the threaded column 9 move in the opposite direction, disengaging from the tight state of the sliding ring 7 and releasing the circumferential restriction of the sliding ring 7.

[0049] Slide the sliding ring 7 so that the extension of the sliding ring 7 disengages from the fixing port 8 of the fixing rod 403 and aligns the movable port with the fixing rod 403. At this time, the axial locking of the fixing rod 403 is released.

[0050] Holding the first fixing ring 401, pull it away from the second fixing ring 402, so that the fixing rod 403 will sequentially disengage from the second fixing ring 402, the second cleaning ring 302, the second valve core head 204, the sealing ring 203, the first valve core head 202, and the first cleaning ring 301;

[0051] Remove the worn first cleaning ring 301 or second cleaning ring 302, replace it with a new cleaning ring, and then reinstall it according to the assembly steps described above to complete the maintenance.

[0052] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A hydraulic valve spool, comprising a valve body (1), an inside of the valve body (1) is slidably provided with a spool assembly, the spool assembly comprises a spool body (201), both ends of the spool body (201) are fixedly installed with a first spool head (202), the side away from each other of the two first spool heads (202) is fixedly installed with a sealing ring (203), the side away from each other of the two sealing rings (203) is fixedly installed with a second spool head (204), characterized in that, The valve core body (201) is symmetrically provided with cleaning components on both sides, which can clean the inner wall of the valve body (1) when the valve core body (201) slides. Both cleaning components are provided with installation components that can quickly install and remove the cleaning components. The cleaning components include a first cleaning ring (301) provided on one side of the first valve core head (202) and a second cleaning ring (302) provided on one side of the second valve core head (204). The cylindrical surfaces of the first cleaning ring (301) and the second cleaning ring (302) are both in contact with the inner wall of the valve body (1).

2. A hydraulic valve spool as claimed in claim 1, wherein, The installation assembly includes a first fixing ring (401) on one side of the first cleaning ring (301) and a second fixing ring (402) on one side of the second cleaning ring (302). A plurality of fixing rods (403) are fixedly installed on the side of the first fixing ring (401) near the second fixing ring (402). One end of each fixing rod (403) passes through the adjacent first cleaning ring (301), first valve core head (202), sealing ring (203), second valve core head (204), second cleaning ring (302), and second fixing ring (402) in sequence.

3. A hydraulic valve spool as claimed in claim 2, wherein, Limiting grooves (5) are provided on the side of the first cleaning ring (301) and the second cleaning ring (302) that are far apart from each other, and the first fixing ring (401) and the second fixing ring (402) are both located inside the adjacent limiting grooves (5).

4. A hydraulic valve spool as defined in claim 2 wherein, The second fixing ring (402) has a sliding groove (6) arranged in an annular shape on one side. A sliding ring (7) is slidably installed inside the sliding groove (6). The sliding groove (6) is I-shaped. Each fixing rod (403) has a fixing port (8) on the cylindrical surface that passes through one end of the second fixing ring (402). The cylindrical surface of the sliding ring (7) located outside the sliding groove (6) extends outward to the fixing port (8) of multiple fixing rods (403).

5. A hydraulic valve spool as claimed in claim 4, wherein, The sliding ring (7) has multiple movable openings on its cylindrical surface outside the sliding groove (6) that are adapted to the fixed rod (403).

6. A hydraulic valve spool as claimed in claim 2, wherein, The second fixing ring (402) has a threaded groove on one side, and a threaded post (9) is threaded inside the threaded groove. A rotating block (10) is fixedly installed at one end of the threaded post (9), and the threaded post (9) is located inside one of the movable openings.

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