Rotary cushion valve with neutral position recognition function
By introducing a proximity switch into the slewing buffer valve to detect the change in valve core position and convert it into an electrical signal, the problem that mechanically operated cranes cannot identify the slewing action status is solved, and the slewing buffer and alarm functions are realized.
Patent Information
- Application Number
- CN202423035272.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Mechanically operated cranes cannot accurately identify the start and stop status of the slewing action and cannot implement slewing buffering or slewing alarm functions.
A rotary buffer valve with a mid-position recognition function is designed. The position change of the valve core is detected by a proximity switch and converted into an electrical signal to achieve rotary buffer control and alarm prompts.
It realizes the slewing buffer control and slewing alarm functions of the mechanically operated crane and provides accurate mid-position identification signal support.
Smart Images
Figure CN223459628U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to rotary buffer valve field especially relates to a rotary buffer valve with mid-position recognition function. BACKGROUND
[0002] Rotary buffer refers to the rotary action of the crane when stopping quickly, the whole vehicle will shake violently due to the change of speed, in order to reduce the shaking, the rotary motor back pressure oil overflow technology is used to make the rotary action slide a small distance to release the rotary kinetic energy, so that the rotary action can stop smoothly. Some foreign countries and regions have mandatory requirements that the crane needs to have a rotary alarm lamp to flash and warn when the rotary action.
[0003] In order to realize the rotary alarm function of the truck crane or to improve the rotary buffer performance, it is necessary to accurately identify the start and stop actions of the rotary action. For the hydraulic pilot operated truck crane, the control pressure of the rotary buffer valve can be detected to identify the rotary action, and for the electrically controlled truck crane, the output signal of the electric control handle can be directly used. The rotary buffer technology and the rotary alarm function have been widely used in the hydraulic control and electric control cranes, but the mechanical control crane has neither pilot control oil circuit nor electric control handle, so it cannot accurately identify the start and stop states of the rotary action, and cannot reliably realize the rotary buffer or rotary alarm function.
[0004] Therefore, it is necessary to develop a new rotary buffer valve to accurately identify the start and stop states of the rotary action and realize the rotary buffer or rotary alarm function. UTILITY MODEL CONTENT
[0005] The utility model discloses a rotary buffer valve with mid-position recognition function, which can detect the mid-position of the rotary buffer valve and convert it into an electric signal. The crane controller can complete the rotary buffer control and rotary alarm prompt functions according to the signal.
[0006] Technical scheme: The utility model discloses a rotary buffer valve with mid-position recognition function, which comprises a valve stem, a valve body, a detection valve core, a spring, a proximity switch mounting seat and a proximity switch. The proximity switch is arranged in the proximity switch mounting seat. The detection valve core of the proximity switch has an arc-shaped protrusion. The detection valve core is externally provided with a spring. The protrusion of the detection valve core is in contact with the valve stem of the valve body.
[0007] The valve stem is provided with a groove corresponding to the protrusion of the detection valve core.
[0008] When the valve stem is in the mid-position, the protrusion of the detection valve core is embedded in the groove of the valve stem, and the protrusion is away from the proximity switch.
[0009] Wherein, the valve stem station, the detection valve core protruding from the valve stem groove, the protruding approach approach switch.
[0010] Wherein, the valve body is provided with a controller, and the controller is connected with the proximity switch.
[0011] Wherein, the controller is provided with an alarm structure.
[0012] Wherein, the valve body is located on the slewing mechanism of the crane.
[0013] Beneficial effect: compared with the prior art, the utility model has the following remarkable advantages: the utility model has the mid-position recognition function, can convert the mid-position recognition result into the electric signal, provides the recognition signal for the mechanical control crane slewing alarm and the slewing buffer technology etc. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is the structural schematic diagram of the utility model;
[0015] Fig. 1 is the valve stem;2 is the valve body;3 is detection valve core;4 is spring;5 is proximity switch mounting seat;6 is proximity switch. DETAILED DESCRIPTION
[0016] The technical scheme of the utility model is further described below in combination with the drawings and specific embodiments.
[0017] The utility model discloses a slewing buffer valve with mid-position recognition function, including valve stem 1, valve body 2, detection valve core 3, spring 4, proximity switch mounting seat 5 and proximity switch 6, proximity switch 6 sets up in proximity switch mounting seat 5, and the detection valve core 3 of proximity switch 6 has arc protruding, and the detection valve core 3 outside is equipped with spring 4, and the protruding of detection valve core 3 contacts the valve stem 1 of valve body 2.Valve body 2 is located on the slewing mechanism of the crane.
[0018] The valve stem 1 of the utility model is provided with the recess corresponding to the protruding of detection valve core 3.The valve stem 1 mid-position, the protruding of detection valve core 3 is embedded in the recess of valve stem 1, and the protruding is far from proximity switch 6.The valve stem 1 station, the protruding of detection valve core 3 is separated from the recess of valve stem 1, and the protruding is close to proximity switch 6.Valve body 2 is provided with a controller, and the controller is connected with proximity switch 6.The controller is provided with an alarm structure.
[0019] The utility model adds detection valve core in the controller of slewing control valve, and the position state change of detection valve core is converted into electric signal through proximity switch identification, to realize the function such as mechanical control type automobile crane to complete slewing buffer control and slewing alarm prompt.
[0020] When working: when the rotary action is not working and in the middle position, the front end of the detection valve core 3 is in the groove of the valve rod 1 under the pre-compression force of the spring 4, the end of the detection valve core 3 is far away from the proximity switch 6 and is out of the detection range of the proximity switch 6, and the proximity switch 6 has no output signal. The distance between the proximity switch 6 and the end of the detection valve core 3 can be adjusted by adjusting the depth of the proximity switch 6 screwed into the proximity switch mounting seat 5.
[0021] When the rotary action is performed by operating the pull rod, the valve rod 1 moves left or right. The detection valve core 3 is pushed out of the groove of the valve rod 1 by the valve rod 1, the detection valve core 3 moves away from the valve rod 1, the end of the detection valve core 3 is close to the proximity switch 6, and the distance between the end of the detection valve core 3 and the proximity switch 6 is reduced. The internal circuit of the proximity switch 6 is turned on to send a signal to the controller.
[0022] When the rotary action is stopped by operating the pull rod to the middle position, the valve rod 1 returns to the middle position, the detection valve core 3 is pressed into the groove of the valve rod 1 again under the spring force of the spring 4, and the output signal of the proximity switch 6 disappears.
[0023] The utility model has the middle position recognition function, can transform the middle position recognition result into the electric signal, provides the recognition signal for the mechanical control crane rotary alarm and rotary buffer technology. The crane controller controls the rotary buffer control or the rotary alarm response through the signal of the proximity switch and the action of the rotary buffer valve.
Claims
1. A rotary cushion valve with a center position recognition function, characterized by: The utility model relates to a valve, including valve stem (1), valve body (2), detection valve core (3), spring (4), proximity switch mounting seat (5) and proximity switch (6), proximity switch (6) sets up in proximity switch mounting seat (5), and detection valve core (3) of proximity switch (6) has arc convex, and detection valve core (3) outside is equipped with spring (4), and the convex of detection valve core (3) contacts valve stem (1) of valve body (2).
2. The rotary cushion valve with a center identification function according to claim 1, characterized in that: The valve stem (1) is provided with a groove corresponding to the convex of the detection valve core (3).
3. The rotary cushion valve with a center identification function according to claim 2, characterized in that: When the valve stem (1) is in the middle position, the convex of the detection valve core (3) is embedded in the groove of the valve stem (1), and the convex is away from the proximity switch (6).
4. The rotary cushion valve with a center identification function according to claim 2, characterized in that: When the valve stem (1) is in the working position, the convex of the detection valve core (3) is separated from the groove of the valve stem (1), and the convex is close to the proximity switch (6).
5. The rotary cushion valve with a center identification function according to claim 1, characterized in that: The valve body (2) is provided with a controller connected with the proximity switch (6).
6. The rotary cushion valve with a center identification function according to claim 5, characterized in that: The controller is provided with an alarm structure.
7. The rotary cushion valve with a center position recognition function according to any one of claims 1 to 6, characterized in that: The valve body (2) is located on the slewing mechanism of the crane.