Hydraulic valve with early warning function

Abstract

The utility model relates to the technical field of hydraulic valves, in particular to a hydraulic valve with an early warning function, which comprises a valve body, a valve cavity is arranged in the valve body, a valve core is accommodated in the valve cavity, the valve cavity is communicated with a liquid inlet channel, a first liquid outlet channel and a second liquid outlet channel, the liquid inlet channel is communicated with an early warning device, the early warning device comprises a movable cavity, and the movable cavity is communicated with the valve core. A movable early warning rod and a fixed limit switch are arranged in the movable cavity, and the limit switch is provided with a wiring terminal connected with the outside; the valve body is connected with a switchover rocking handle capable of swinging and a clamping mechanism, and the switchover rocking handle and the clamping mechanism are both in contact with the valve element. According to the hydraulic valve with the early warning function, early warning can be conducted on internal overpressure, changes are visual, a switch capable of being communicated with a control system is arranged, control over oil pressure is achieved, safety and reliability of the hydraulic system are improved, and meanwhile the hydraulic valve is simple in structure and easy to maintain and has wide application prospects and market value.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic valves, in particular to a hydraulic valve with an early warning function. Background Art

[0002] Hydraulic valves are widely used in many industrial equipment today. They are key control components in hydraulic systems and are used to control the direction, pressure and flow of liquid in hydraulic systems. However, if a fault or abnormality occurs, conventional hydraulic valves cannot provide early warning functions when the system pressure exceeds the preset value, and are often difficult to detect and handle in time, causing the system to damage important components due to overload or excessive pressure, or even cause safety accidents. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and to provide a hydraulic valve with an early warning function, which is connected to an early warning device, provides an indication when the pressure is too high and can be connected to a control circuit, thereby effectively improving the safety and reliability of the hydraulic system.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A hydraulic valve with an early warning function comprises a valve body, a valve cavity is arranged in the valve body, a valve core is accommodated in the valve cavity, a liquid inlet, a first liquid outlet and a second liquid outlet are connected to the valve cavity, the liquid inlet is connected to an early warning device, the early warning device comprises an active cavity, a movable early warning rod and a fixed limit switch are arranged in the active cavity, and the limit switch is provided with a wiring terminal connected to the outside;

[0006] The valve body is connected with a swingable switching handle and a locking mechanism, and both the switching handle and the locking mechanism are in contact with the valve core.

[0007] Furthermore, the lower part of the active cavity is located in the valve body, and the upper part is a transparent cover connected to the valve body. The lower end of the warning rod is connected to the piston arranged in the active cavity, and a tension spring is arranged between the lower end of the piston and the valve body. The limit switch is located above the warning rod, and the limit switch is provided with a touch rod facing one side of the warning rod, and the warning rod is provided with a plurality of indicator color strips of different depths.

[0008] Furthermore, the switching handle is provided with a first ball shaft and a second ball shaft, the first ball shaft is movably connected to the valve body, and the second ball shaft is movably connected to the valve core.

[0009] Furthermore, the locking mechanism includes a locking block and a locking bead in contact with the locking block above, a plurality of slots are arranged laterally on the valve core above the locking block, the locking bead is locked into one slot at a time, and an elastic body is provided below the locking block to push it upwards.

[0010] Furthermore, the number of the card slots is 3.

[0011] Furthermore, a conducting valve hole is provided in the middle of the valve core, and the conducting valve hole does not conduct the first liquid outlet and the second liquid outlet.

[0012] Furthermore, the conducting valve cavity conducts the liquid inlet and the first liquid outlet.

[0013] Furthermore, the conducting valve hole conducts the liquid inlet and the second liquid outlet.

[0014] Furthermore, a compression spring is disposed on each side of the conducting valve cavity.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] The utility model discloses a hydraulic valve with early warning function, which can give early warning of internal overpressure, and the change is intuitively visible. A switch that can be connected to the control system is provided to realize the control of oil pressure, thereby improving the safety and reliability of the hydraulic system. At the same time, the hydraulic valve has a simple structure and is easy to maintain. It has broad application prospects and market value and can be applied to various hydraulic systems, such as engineering machinery, metallurgical equipment, ships, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0019] Figure 3 for Figure 1 A magnified schematic diagram of point B in the middle.

[0020] In the figure: 1. valve body; 1a. liquid inlet; 1b. first liquid outlet; 1c. second liquid outlet; 2. valve core; 2a. conducting valve hole; 2b. compression spring; 3. early warning device; 3a. movable chamber; 3a-1. transparent cover; 3b. early warning rod; 3c. limit switch; 3d. piston; 3e. tension spring; 4. switching crank handle; 4a. first ball shaft; 4b. second ball shaft; 5. locking mechanism; 5a. locking block; 5b. locking bead. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] like Figure 1 to Figure 3As shown, a hydraulic valve with an early warning function includes a valve body 1, a valve cavity is arranged in the valve body 1, a valve core 2 is accommodated in the valve cavity, the valve core 2 and the valve body 1 together form a liquid flow channel, specifically, the valve cavity is connected with a liquid inlet 1a, a first liquid outlet 1b and a second liquid outlet 1c, a conducting valve hole 2a is arranged in the middle of the valve core 2, and a compression spring 2b for resetting is arranged on each side of the conducting valve hole 2a, the conducting valve hole 2a does not conduct the first liquid outlet 1b and the second liquid outlet 1c, when the valve core 2 is moved to the left, the conducting valve hole 2a conducts the liquid inlet 1a and the first liquid outlet 1b, when the valve core 2 is moved to the right, the conducting valve hole 2a conducts the liquid inlet 1a and the second liquid outlet 1c, thereby realizing the selection and switching of the hydraulic oil flow channel.

[0023] Specifically, the caliber of the liquid inlet 1a is larger than that of the first liquid outlet 1b and the second liquid outlet 1c. In order to provide an early warning of excessive pressure in the liquid inlet 1a, the liquid inlet 1a is connected to an early warning device 3. The early warning device 3 includes an active chamber 3a. An active early warning rod 3b and a fixed limit switch 3c are arranged in the active chamber 3a. The limit switch 3c is provided with a wiring terminal connected to the outside, and the wiring terminal can be connected to the hydraulic control system. The limit switch 3c is also called a travel switch. Its working principle is similar to that of a button, but the difference is that its contact action is not achieved by manual operation, but by the collision of mechanical moving parts. When a mechanical component (such as a stopper or a bumper) moves to a specified position, it will collide with the operating mechanism (such as a touch rod) of the limit switch 3c, thereby triggering the switch action and realizing the on-off switching of the internal circuit; the lower part of the active chamber 3a is located in the valve body 1, and the upper part is a transparent cover 3a-1 connected to the valve body 1, the lower end of the warning rod 3b is connected to the piston 3d arranged in the active chamber 3a, and a tension spring 3e is arranged between the lower end of the piston 3d and the valve body 1, the limit switch 3c is located above the warning rod 3b, and the limit switch 3c is provided with a touch rod facing the side of the warning rod 3b, and the warning rod 3b is provided with a plurality of indicator color strips of different depths. When the pressure in the inlet channel 1a exceeds the set value, the force balance of the warning rod 3b is broken, and it is pushed upward by the oil pressure. By observing the color change of the indicator color bar through the transparent cover 3a-1, it can be known that the pressure in the hydraulic valve exceeds the standard, and the early warning function is realized. When the warning rod 3b moves up to the top position, its top hits the touch rod of the limit switch 3c, thereby controlling the on-off of the circuit. If the terminal of the limit switch 3c is connected to the system that controls the operation of the hydraulic pump, the hydraulic pump can be controlled to reduce power or stop working, thereby realizing the pressure regulation of the inlet channel 1a and ensuring the working safety of the hydraulic valve and the hydraulic system.

[0024] Among them, in order to realize the displacement control of the valve core 2 and the position maintenance after it is in place, the valve body 1 is connected with a swingable switching crank handle 4 and a locking mechanism 5, the switching crank handle 4 and the locking mechanism 5 both contact the valve core 2, and the switching crank handle 4 is provided with a first ball shaft 4a and a second ball shaft 4b, the first ball shaft 4a is movably connected to the valve body 1, and the second ball shaft 4b is movably connected to the valve core 2, and the position of the valve core 2 in the valve body 1 can be changed by shaking the switching crank handle 4, thereby realizing the selective switching of the hydraulic oil channel; when the switch is in place, the locking mechanism works, specifically, the locking mechanism 5 includes a locking block 5a and a locking bead 5b in contact with the upper part of the locking block 5a, the valve core 2 above the locking block 5a is laterally arranged with three locking grooves, the locking bead 5b is locked into one locking groove at a time, and an elastic body for pushing it upward is provided under the locking block 5a, and the locking bead 5b can be locked into the locking groove to fix the position of the valve core 2.

[0025] To summarize the above scheme, the hydraulic valve with early warning function disclosed by the utility model can give early warning of internal overpressure, the changes are intuitively visible, and a switch that can be connected to the control system is provided to realize control of the oil pressure, thereby improving the safety and reliability of the hydraulic system. At the same time, the hydraulic valve has a simple structure and is easy to maintain, and has broad application prospects and market value.

[0026] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. It should be pointed out that for those skilled in the art, relevant changes, modifications or additions without departing from the concept of the utility model should be included in the protection scope of the utility model.

Claims

1. A hydraulic valve with an early warning function, characterized in that: The valve body (1) comprises a valve cavity provided in the valve body (1), a valve core (2) being accommodated in the valve cavity, the valve cavity being connected to a liquid inlet (1a), a first liquid outlet (1b) and a second liquid outlet (1c), the liquid inlet (1a) being connected to an early warning device (3), the early warning device (3) comprising an active cavity (3a), a movable early warning rod (3b) and a fixed limit switch (3c) being provided in the active cavity (3a), the limit switch (3c) being provided with a wiring terminal connected to the outside; The valve body (1) is connected to a swingable switching handle (4) and a locking mechanism (5), and both the switching handle (4) and the locking mechanism (5) are in contact with the valve core (2).

2. A hydraulic valve with early warning function according to claim 1, characterized in that: The lower part of the movable chamber (3a) is located in the valve body (1), and the upper part is a transparent cover (3a-1) connected to the valve body (1); the lower end of the warning rod (3b) is connected to a piston (3d) arranged in the movable chamber (3a); a tension spring (3e) is arranged between the lower end of the piston (3d) and the valve body (1); the limit switch (3c) is located above the warning rod (3b); the limit switch (3c) is provided with a touch rod facing one side of the warning rod (3b); and the warning rod (3b) is provided with a plurality of indicating color strips of different depths.

3. A hydraulic valve with early warning function according to claim 1, characterized in that: The switching handle (4) is provided with a first ball shaft (4a) and a second ball shaft (4b), the first ball shaft (4a) being movably connected to the valve body (1), and the second ball shaft (4b) being movably connected to the valve core (2).

4. A hydraulic valve with early warning function according to claim 1, characterized in that: The locking mechanism (5) comprises a locking block (5a) and a locking bead (5b) contacting the locking block (5a) above; the valve core (2) above the locking block (5a) is provided with a plurality of locking grooves arranged in a transverse manner; the locking bead (5b) is locked into one of the locking grooves at a time; and an elastic body is provided below the locking block (5a) to push it upward.

5. A hydraulic valve with early warning function according to claim 4, characterized in that: The number of the card slots is 3.

6. A hydraulic valve with early warning function according to claim 1, characterized in that: A conducting valve hole (2a) is provided in the middle of the valve core (2), and the conducting valve hole (2a) does not conduct the first liquid outlet (1b) and the second liquid outlet (1c).

7. A hydraulic valve with early warning function according to claim 6, characterized in that: The conducting valve cavity (2a) conducts the liquid inlet channel (1a) and the first liquid outlet channel (1b).

8. The hydraulic valve with early warning function according to claim 6, characterized in that: The conducting valve cavity (2a) conducts the liquid inlet channel (1a) and the second liquid outlet channel (1c).

9. The hydraulic valve with early warning function according to claim 6, characterized in that: A compression spring (2b) is provided on each side of the conduction valve cavity (2a).

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