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CN-122008124-A - Dismounting device and method for hydraulic valve sleeve

CN122008124ACN 122008124 ACN122008124 ACN 122008124ACN-122008124-A

Abstract

The invention belongs to the technical field of hydraulic systems, and discloses a dismounting device and method for a hydraulic valve sleeve, wherein the dismounting device comprises two connecting claws, a sleeve, a screw rod, a handle, a traction nut, a pin shaft and a connecting piece, wherein the two connecting claws are axially connected to one end of the connecting piece, the front end of the screw rod is provided with an ear fork structure, the connecting piece is arranged in the ear fork structure at the front end of the screw rod through the pin shaft, the sleeve is arranged outside the screw rod, the connecting piece and the connecting claws, the screw rod extends out from the rear end of the sleeve, and the traction nut and the handle are arranged outside the part of the screw rod extending out from the rear end of the sleeve. The invention ensures the coaxiality of the valve sleeve and the valve sleeve mounting hole in the disassembly process, avoids clamping stagnation or shell damage caused by deflection in the valve sleeve disassembly process, realizes smooth passage of the sealing element through the guide hole and the chamfer angle on the sleeve, and avoids damage caused by the sealing element passing the sharp edge of the part in the disassembly process.

Inventors

  • LIU BIN
  • CHANG YONG
  • SHEN XIANKUN

Assignees

  • 中国航空工业集团公司金城南京机电液压工程研究中心

Dates

Publication Date
20260512
Application Date
20251217

Claims (8)

  1. 1. The utility model provides a dismounting device of hydraulic pressure valve pocket, a serial communication port, including two connecting claws (1), sleeve (2), screw rod (3), handle (4), draw nut (5), round pin axle (6) and connecting piece (7), two connecting claws (1) axial connection are in connecting piece (7) one end, the front end of screw rod (3) is equipped with ear fork structure, connecting piece (7) are packed into in the ear fork structure of screw rod (3) front end through round pin axle (6), sleeve (2) are established outside screw rod (3), connecting piece (7) and connecting claw (1), screw rod (3) stretch out from the rear end of sleeve (2), part that screw rod (3) stretch out from the rear end of sleeve (2) is peripheral hardware draw nut (5) and handle (4).
  2. 2. A hydraulic valve housing dismounting device according to claim 1, characterized in that the front end of the sleeve (2) is provided with an external thread, and that the front end of the sleeve (2) has a contour corresponding to the external thread and to the contour of the screw cap (12) of the middle end of the hydraulic valve to be dismounted.
  3. 3. A hydraulic valve housing dismounting device as claimed in claim 1, characterized in that the connection piece (7) is arranged in a fork structure at the front end of the screw (3), the connection piece (7) being radially spaced from the fork structure.
  4. 4. A hydraulic valve housing dismounting device according to claim 1, characterized in that the front end of the coupling claw (1) is provided with a pin (1 a) radially upwards or downwards, the pin (1 a) being adapted to the mounting hole (10 a) of the inner wall of the valve housing (10) to be dismounted.
  5. 5. A hydraulic valve housing dismounting device according to claim 1, characterized in that the connecting piece (7) is provided with a kidney-shaped hole (7 a) radially cooperating with the pin shaft (6), the pin shaft (6) being capable of moving in the kidney-shaped hole (7 a) perpendicular to the centre line of the screw (3), while the connecting piece (7) and the screw (3) are capable of transmitting a rotation through the pin shaft (6) for compensating for errors in the coaxiality between the screw (3) and the valve housing (10).
  6. 6. The dismounting device of a hydraulic valve housing as claimed in claim 1, characterized in that the sleeve (2) is provided with an elongated slot (2 a) on the side, the installation of the pin shaft (6) and the connecting piece (7) is performed by means of the elongated slot (2 a), and the position situation of the valve housing (10) during the dismounting process is observed.
  7. 7. The dismounting device for a hydraulic valve sleeve according to claim 1, characterized in that a stepped hole is formed in the sleeve (2), wherein a small inner hole (2 b) close to the front end is small in diameter and has the same diameter as a mounting hole 11a of the valve sleeve 10 in the housing 11, a large inner hole (2 c) close to the rear end is large in diameter, a first chamfer (2 d) is formed between the small inner hole (2 b) and the large inner hole (2 c) in a transition manner, a second chamfer (2 e) is formed on the end face of the small inner hole (2 b), and the joint edge of the first chamfer (2 d) and the second chamfer (2 e) is rounded.
  8. 8. A method of disassembling a hydraulic valve housing using a hydraulic valve housing disassembling device as defined in any one of claims 1-7, comprising the steps of: S1, unscrewing a screw cover (12) on a shell (11), removing a spring (13), a valve core (14) and a spring seat (15), and cleaning oil; s2, two connecting claws (1) and a valve sleeve (10) are matched and installed in place, and then the two connecting claws (1) are connected with a connecting piece (7); s3, connecting the handle (4) with the traction nut (5), screwing the traction nut (5) on the screw rod (3), and integrally screwing the traction nut into an inner hole of the sleeve (2); S4, sleeving the sleeve (2) on the outer side of the connecting piece (7) and the exposed connecting claw (1), and connecting the screw rod (3) and the connecting piece (7); s5, screwing the sleeve (2) into a mounting hole of a screw cap (12) on the shell (11); S6, rotating the handle (4), and driving the valve sleeve (10) to move towards the outside of the shell (11) by the screw rod (3) through the pin shaft (6), the connecting piece (7) and the connecting claw (1).

Description

Dismounting device and method for hydraulic valve sleeve Technical Field The invention belongs to the technical field of hydraulic systems, and relates to a dismounting device and a dismounting method for a hydraulic valve sleeve. Background Hydraulic spool valves are widely used inside hydraulic products for achieving switching of oil passages. In order to separate oil ways on the shell, the gap between the hydraulic valve sleeve and the matching hole is smaller, a plurality of sealing grooves are formed in the outer circle of the valve sleeve, and sealing elements are arranged in the grooves. After the valve sleeve is arranged in the shell, a certain friction force exists between the sealing element and the inner hole of the shell, the number of the sealing elements on the complex slide valve is large, and the friction force between the whole valve sleeve and the inner hole of the shell is large, so that the valve sleeve is difficult to disassemble. Moreover, because the fit clearance between the valve sleeve and the shell hole is smaller, if the valve sleeve deflects in the disassembly process, the damage to the shell inner hole is easy to cause, the sealing after the reinstallation is affected, and the shell parts with complex oil paths, high processing precision and high cost are scrapped in severe cases. At present, a valve sleeve with a simpler oil way, a shorter size and fewer sealing elements can be disassembled by using an expanding clamp tool, an expanding clamp is inserted into an inner hole of the valve sleeve, the expanding clamp is operated to expand, and the valve sleeve and the expanding clamp are fixed by utilizing friction force between the expanding clamp and the inner hole of the valve sleeve, so that the valve sleeve is pulled out. When the valve sleeve with more complex oil ways, longer size and more sealing elements is designed into a through hole, the valve sleeve is pressed out by a press machine and an auxiliary tool, and the valve sleeve is additionally added in the way, so that the complexity and the volume of the shell are increased, and the design is difficult in occasions with high requirements on the volume, the weight and the enveloping shape of a product (such as aviation onboard equipment). Disclosure of Invention In order to solve the problems, the invention provides a dismounting device and a dismounting method for a hydraulic valve sleeve, which take the problem of coaxiality of the valve sleeve and a valve sleeve mounting hole in the dismounting process into consideration, and avoid clamping stagnation or shell damage caused by deflection in the valve sleeve dismounting process. The technical scheme of the invention is as follows: The utility model provides a dismounting device of hydraulic pressure valve pocket, including two connecting claws, sleeve, screw rod, handle, draw nut, round pin axle and connecting piece, two connecting claws axial connection is in connecting piece one end, and the front end of screw rod is equipped with ear fork structure, and the connecting piece is packed into in the ear fork structure of screw rod front end through the round pin axle, and the sleeve is established outside screw rod, connecting piece and connecting claw, and the screw rod stretches out from telescopic rear end, and the screw rod is equipped with draw nut and handle outward from the part that the telescopic rear end stretches out. Further, the front end of the sleeve is provided with external threads, and the shape of the front end of the sleeve is consistent with the external threads and the shape of the screw cap of the middle end part of the hydraulic valve to be disassembled is consistent with the external threads. Further, after the connecting piece is placed in the ear fork structure at the front end of the screw rod, a gap is reserved between the connecting piece and the ear fork structure in the radial direction. Further, the front end of the connecting claw is provided with a pin which is radially upwards or downwards and matched with the mounting hole of the inner wall of the valve sleeve to be disassembled. Further, the connecting piece is radially provided with a waist-shaped hole matched with the pin shaft, the pin shaft can move in the waist-shaped hole perpendicular to the central line of the screw rod, and meanwhile, the connecting piece and the screw rod can rotate through the pin shaft in a transmitting mode, so that the error of coaxiality between the screw rod and the valve sleeve is compensated. Further, the side surface of the sleeve is provided with a long groove, the long groove is used for installing the pin shaft and the connecting piece, and the position condition of the valve sleeve in the dismounting process is observed. Further, a stepped hole is formed in the sleeve, wherein a small inner hole close to the front end is small in diameter, the diameter of the small inner hole is the same as that of a mounting hole 11a of the valve sleeve 10 i