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CN-224200886-U - Control valve

CN224200886UCN 224200886 UCN224200886 UCN 224200886UCN-224200886-U

Abstract

The utility model discloses a control valve, which comprises a shell, a valve body and a pressure regulating assembly, wherein the valve body and the pressure regulating assembly are respectively assembled in the shell, the shell is provided with a connecting port, a valve core is slidably arranged in an inner cavity of the valve body, both ends of the valve core extend out of the valve body, the first ends of the valve core extend into the connecting port, the second ends of the valve core are connected with the pressure regulating assembly, an elastic piece is sleeved on the valve core, both ends of the elastic piece are respectively fixedly connected with the valve core and the valve body, a first hole and a second hole are formed in the valve body, an exhaust hole for the second end of the valve core to pass through is formed in the valve body, a gap is reserved between the exhaust hole and the valve core, a third hole for communicating the exhaust hole with the outside is formed in the pressure regulating assembly, and a convex edge on the valve core divides the inner cavity of the valve body into a plurality of cavities so that the second hole is communicated with the exhaust hole or the first hole. The utility model controls the second hole to be communicated with the first hole or the exhaust hole according to the oil pressure change in the connecting port, and the control valve adjusts the preset pressure through the pressure regulating component.

Inventors

  • WU XING
  • HUA ZHENJIE

Assignees

  • 上海钛祺自动精密工业有限公司

Dates

Publication Date
20260505
Application Date
20250521

Claims (10)

  1. 1. A control valve suitable for being applied to a hand riveter, which is characterized by comprising a shell, and a valve body and a pressure regulating assembly which are respectively assembled in the shell; the shell is provided with a connecting port which is suitable for being communicated with the inner cavity of the oil cylinder; The valve body comprises a valve body, a connecting port, a pressure regulating assembly, a valve core, a valve rod and a valve rod, wherein the valve core is slidably arranged in an inner cavity of the valve body; the valve core is sleeved with an elastic piece, and two ends of the elastic piece are fixedly connected with the valve core and the valve body respectively; The valve body is provided with a first hole and a second hole which are communicated with the inner cavity of the valve body, and the shell is provided with a first through hole and a second through hole which respectively correspond to the first hole and the second hole; the valve body is provided with an exhaust hole for the second end of the valve core to pass through, and a gap exists between the exhaust hole and the valve core; The outer peripheral wall of the valve core is provided with a convex edge so as to divide the inner cavity of the valve body into a plurality of cavities, so that the second hole is communicated with the exhaust hole or the first hole; when the pressure born by the first end of the valve core is smaller than the preset pressure, the second hole is communicated with the first hole, otherwise, the second hole is communicated with the exhaust hole; The pressure regulating component is suitable for regulating the magnitude of the preset pressure.
  2. 2. The control valve of claim 1, wherein the first bore, the second bore, and the vent bore are sequentially distributed along an axial direction of the valve body; the convex edge comprises a first convex ring and a second convex ring which are distributed at intervals along the axial direction of the valve body; The first convex rings are distributed on one side of the second holes close to the first holes, and the second convex rings are distributed on one side of the second holes close to the exhaust holes; When the pressure born by the first end of the valve core is smaller than the preset pressure, the first convex ring and the second convex ring are in sealing fit with the inner wall of the valve body, the convex edge divides the inner cavity of the valve body into three cavities which are not communicated with each other, and only the first hole and the second hole are arranged in the same cavity; When the pressure born by the first end of the valve core is greater than or equal to the preset pressure, only the first convex ring is in sealing fit with the inner wall of the valve body, the first convex ring divides the inner cavity of the valve body into two cavities which are not communicated with each other, and only the second hole and the exhaust hole are arranged in the same cavity; The elastic piece is arranged in the valve body and is positioned at one side of the second convex ring far away from the first convex ring, the first end of the elastic piece is fixedly connected with the second convex ring, and the second end of the elastic piece is fixedly connected with the inner wall of the valve body.
  3. 3. The control valve of claim 2, wherein the first collar is in sealing engagement with an inner wall of the valve body via a corresponding O-ring; The second convex ring is in sealing fit with the inner wall of the valve body through a corresponding O-shaped ring.
  4. 4. The control valve of claim 1, wherein the pressure regulating assembly comprises a base, a swivel rod, and a pressure regulating spring; The first end of the base is assembled in the shell, and the second end of the base extends out of the shell; the first end of the rotary rod is arranged in the base and is in threaded connection with the base, and the second end of the rotary rod extends out of the base; The first end of the pressure regulating spring is fixedly connected with the second end of the valve core, and the second end of the pressure regulating spring is abutted against the rotary rod; The rotary rod is suitable for adjusting the preset pressure.
  5. 5. The control valve of claim 4, wherein the second end of the lever is provided with a retainer ring to limit the lever.
  6. 6. The control valve of claim 4, wherein the pressure regulating assembly further comprises a snap spring; The clamp spring is sleeved on the base; The clamping spring is provided with a limiting protrusion, and the limiting protrusion penetrates through the base and extends into the base; The circumference of the rotary rod is provided with a plurality of positioning concave surfaces, and the positioning concave surfaces are suitable for being matched with the limiting protrusions.
  7. 7. The control valve of claim 4, wherein the end face of the second end of the base is provided with graduation marks adapted to indicate the magnitude of the predetermined pressure.
  8. 8. The control valve of claim 4, wherein the resilient member is a conical spring; The compression direction of the elastic piece, the sliding direction of the valve core, the axial direction of the valve core and the compression direction of the pressure regulating spring are parallel to each other.
  9. 9. The control valve of claim 1, wherein the spool comprises a copper spool and a stem body mounted within an interior cavity of the copper spool; Both ends of the rod body extend out of the copper slide core, the first end of the rod body extends into the connecting port through the ejector rod, and the second end of the rod body is connected with the pressure regulating assembly; the convex edge is arranged on the peripheral wall of the copper sliding core.
  10. 10. The control valve according to claim 1, wherein a plurality of sealing rings are arranged on the peripheral wall of the valve body, and the sealing rings divide the inner cavity of the housing into a plurality of cavities which are not communicated with each other; the first through hole and the second through hole are arranged in different cavities of the shell.

Description

Control valve Technical Field The utility model relates to the technical field of hand riveters, in particular to a control valve. Background The hand riveter is used for fastening and riveting various metal plates, pipes and other manufacturing industries. In the prior art, a hydraulic driving device for driving a screw rod to enter and rivet is arranged in a rivet pulling gun. Referring to fig. 1, the hydraulic drive device 6 includes a cylinder block 61, a first cylinder block 63, and a second cylinder block 64, which are disposed in this order from bottom to top. Wherein a cylinder piston 62 is provided in the cylinder block 61. The rod portion of the cylinder piston 62 extends upward into the first cylinder block 63 to act as a piston for the first cylinder block 63. A power take-off piston 65 is provided in the second cylinder block 64. The power take-off piston 65 extends forwardly beyond the second ram cylinder 64 and is connected to the screw in the head of the hand riveter. The power take-off piston 65 is adapted to drive the screw back and forth to effect the screw feed rivet operation. The inner cavity of the first cylinder block 63 is in communication with the rod cavity of the second cylinder block 64 through a conduit. The hydraulic driving device 6 drives the screw to enter the rivet by injecting gas into the rodless cavity of the cylinder body 61. During the rivet process, the hydraulic drive 6 is prone to overload. Wherein, it is limited by factors such as thickness of the product to be rivet-pulled, when the rivet to be rivet-pulled is short, the distance of rivet-pulled is long, and the rivet is broken. When the rivet to be pulled is long, the distance of pulling and riveting is short, and the pulling and riveting force of the pulling and riveting gun is insufficient. The existing control valve cannot effectively prevent the riveter from being overloaded. In addition, the existing control valve cannot adjust the preset pressure according to the riveting force required by the riveting gun. Disclosure of utility model The utility model aims to solve the technical problem that the existing control valve cannot be matched with a hand riveter and cannot effectively prevent the hand riveter from being overloaded. The utility model discloses a control valve which is suitable for being applied to a hand riveter and comprises a shell, and a valve body and a pressure regulating assembly which are respectively assembled in the shell; the shell is provided with a connecting port which is suitable for being communicated with the inner cavity of the oil cylinder; The valve body comprises a valve body, a connecting port, a pressure regulating assembly, a valve core, a valve rod and a valve rod, wherein the valve core is slidably arranged in an inner cavity of the valve body; the valve core is sleeved with an elastic piece, and two ends of the elastic piece are fixedly connected with the valve core and the valve body respectively; The valve body is provided with a first hole and a second hole which are communicated with the inner cavity of the valve body, and the shell is provided with a first through hole and a second through hole which respectively correspond to the first hole and the second hole; the valve body is provided with an exhaust hole for the second end of the valve core to pass through, and a gap exists between the exhaust hole and the valve core; The outer peripheral wall of the valve core is provided with a convex edge so as to divide the inner cavity of the valve body into a plurality of cavities, so that the second hole is communicated with the exhaust hole or the first hole; when the pressure born by the first end of the valve core is smaller than the preset pressure, the second hole is communicated with the first hole, otherwise, the second hole is communicated with the exhaust hole; The pressure regulating component is suitable for regulating the magnitude of the preset pressure. The position between the valve body and the valve core is adjusted through the oil pressure change in the connecting port by the control valve, so that the second hole is controlled to be communicated with the first hole or the exhaust hole, and the riveter is further protected, so that overload of the riveter is prevented. Optionally, the first hole, the second hole and the exhaust hole are sequentially distributed along the axial direction of the valve body; the convex edge comprises a first convex ring and a second convex ring which are distributed at intervals along the axial direction of the valve body; The first convex rings are distributed on one side of the second holes close to the first holes, and the second convex rings are distributed on one side of the second holes close to the exhaust holes; When the pressure born by the first end of the valve core is smaller than the preset pressure, the first convex ring and the second convex ring are in sealing fit with the inner wall of the valve body, the