CN212899940U

CN212899940U - Overload valve

Info

Publication number: CN212899940U
Application number: CN202021190651.9U
Authority: CN
Inventors: 陈立忠; 侯胜君
Original assignee: Jingjiang New Century Hydraulic Parts Manufacturing Co ltd
Current assignee: Jingjiang New Century Hydraulic Parts Manufacturing Co ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-04-06
Anticipated expiration: 2030-06-23

Abstract

The utility model provides an overload valve, which comprises a valve body, wherein a valve cavity is arranged in the valve body, an oil inlet is arranged on the left end surface of the valve body, an oil outlet is arranged on the side wall of the valve body, an overload valve seat and a main valve core are arranged in the valve cavity, the main valve core is arranged at an inner hole opening of the oil inlet and can slide along the valve cavity, a first spring is arranged between the overload valve seat and the main valve core, and the first spring pushes the main valve core leftwards to enable a left conical surface of the main valve core to be sealed and attached at the inner hole opening of the oil inlet; the right part of the main valve core is provided with a valve hole, the left side of the valve hole is provided with a mounting hole, a sliding rod is mounted in the mounting hole, a damping hole is formed in the sliding rod, two ends of the main valve core are under the action of oil pressure, and the first spring can control the opening and closing of the main valve only with small rigidity; meanwhile, the main valve core is sleeved on the periphery of the overload valve seat, so that the effect of stable sliding can be achieved, and the main valve core is prevented from deflecting to cause poor sealing.

Description

Overload valve

Technical Field

The utility model relates to a hydraulic component makes the field, especially relates to an overload valve.

Background

The overflow valve is one of pressure control elements in the hydraulic system, and plays a role in overflowing redundant pressure oil in the system, so that the pressure of the system is always maintained within a set range, the system is protected, and the system is prevented from being overloaded.

In the prior art, when the pressure of the overflow valve is high and the force is large, the pressure regulating spring is required to have large force, manual regulation is difficult, a hard spring with high rigidity is required, the design and the structure of the spring are difficult to realize, and meanwhile, the valve core is easy to vibrate in the valve cavity, so that the valve core is deflected to cause poor sealing.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is that overflow valve among the prior art requires the pressure regulating spring to have very big power when pressure is higher, strength is great, and manual regulation difficulty needs the great firm spring of rigidity moreover, and the design and the structure of spring are difficult to realize, and the case arouses the vibration easily in the valve pocket simultaneously, causes the case incline then and causes sealed badly, the utility model provides an overload valve solves above-mentioned problem.

The utility model provides a technical scheme that its technical problem adopted is: an overload valve comprises a valve body, wherein a valve cavity is arranged in the valve body, an oil inlet is formed in the left end face of the valve body, an oil outlet is formed in the side wall of the valve body, the oil inlet is communicated with the oil outlet through the valve cavity, an overload valve seat is arranged at the right part of the valve cavity, and the overload valve seat is fixedly installed in the valve cavity and is in sealing arrangement with the inner hole wall of the valve cavity; a main valve core is arranged in the valve cavity and positioned on the left side of the overload valve seat, the main valve core is arranged at an inner hole opening of the oil inlet and can slide along the valve cavity, a first spring is arranged between the overload valve seat and the main valve core, and the first spring pushes the main valve core leftwards to enable a left conical surface of the main valve core to be attached to the inner hole opening of the oil inlet in a sealing mode; the right part of main valve core is equipped with the valve opening, the valve opening cover is established the periphery of transshipping the disk seat left part can be followed the circumference of transshipping the disk seat slides, the inner hole wall of valve opening with the outer wall of transshipping the disk seat sets up sealedly, on the main valve core, be located the valve opening left side is equipped with the mounting hole, install the slide bar in the mounting hole, be provided with the damping hole on the slide bar, the valve opening with the oil inlet passes through the damping hole communicates mutually.

Further: the oil inlet cavity is communicated with the valve hole through the connecting hole, the oil inlet cavity is communicated with the oil outlet through the flow guide hole, the poppet valve core and the pressure regulating mechanism are arranged in the oil inlet cavity, a frustum is arranged on the poppet valve core, the frustum is in a conical shape with the outer diameter gradually shrinking from right to left, and the pressure regulating mechanism pushes the poppet valve core leftwards to enable the frustum to be attached to the inner hole opening of the connecting hole in a sealing mode.

Further: pressure regulating mechanism includes lock nut, pressure regulating bolt and second spring, overload be provided with in the disk seat with pressure regulating bolt matched with internal thread, the second spring is installed in the oil feed chamber, the left end of second spring with poppet fixed connection, the pressure regulating bolt is installed in the internal thread to can push up left the second spring, lock nut installs the right part of pressure regulating bolt.

Further: the outer wall of the sliding rod and the inner hole wall of the mounting hole are arranged in a sealing mode, a clamping table is arranged on the sliding rod and located on the right side of the mounting hole, the outer diameter size of the clamping table is larger than the inner diameter size of the mounting hole, and the sliding rod can move in the mounting hole along the axial direction; and a connecting rod part is arranged on the left side of the frustum on the poppet valve core, and the connecting rod part is inserted into the connecting hole from right to left.

The utility model has the advantages that the overload valve of the utility model has the main valve core and the overload valve seat, the main valve core is acted by oil pressure at both ends, and the first spring only needs small rigidity to control the opening and closing of the main valve; meanwhile, the main valve core is sleeved on the periphery of the overload valve seat, so that the effect of stable sliding can be achieved, and the main valve core is prevented from deflecting to cause poor sealing.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of an overload valve of the present invention;

FIG. 2 is a schematic of the main spool construction;

FIG. 3 is a schematic view of a slide bar construction;

fig. 4 is a schematic view of the structure of the overload valve seat.

In the figure, the valve comprises a valve body 1, a valve cavity 2, a valve cavity 3, an oil inlet 4, an oil outlet 5, an overload valve seat 6, a main valve core 7, a first spring 8, a valve hole 9, a mounting hole 10, a sliding rod 11, a damping hole 12, an oil inlet cavity 13, a poppet valve core 14, a connecting hole 15, a frustum 16, a locking nut 17, a pressure regulating bolt 18, a second spring 19, a clamping platform 20 and a connecting rod part.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used only for convenience in describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present invention includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.

As shown in fig. 1, fig. 2 and fig. 3, the utility model provides an overload valve, which comprises a valve body 1, wherein a valve cavity 2 is arranged in the valve body 1, an oil inlet 3 is arranged on the left end surface of the valve body 1, an oil outlet 4 is arranged on the side wall of the valve body 1, the oil inlet 3 is communicated with the oil outlet 4 through the valve cavity 2, an overload valve seat 5 is arranged at the right part of the valve cavity 2, and the overload valve seat 5 is fixedly arranged in the valve cavity 2 and is sealed with the inner hole wall of the valve cavity 2; a main valve core 6 is arranged in the valve cavity 2 and positioned on the left side of the overload valve seat 5, the main valve core 6 is arranged at an inner hole opening of the oil inlet 3 and can slide along the valve cavity 2, a first spring 7 is arranged between the overload valve seat 5 and the main valve core 6, and the first spring 7 pushes the main valve core 6 leftwards so that the left conical surface of the main valve core 6 is in sealing fit with the inner hole opening of the oil inlet 3; the right part of main valve element 6 is equipped with valve opening 8, 8 covers of valve opening are established the periphery of transshipping 5 left parts of disk seat can be followed the circumference of transshipping 5 of disk seat slides, the interior pore wall of valve opening 8 with the sealed setting of the outer wall of transshipping 5 of disk seat, on main valve element 6, be located 8 left sides of valve opening are equipped with mounting hole 9, install slide bar 10 in the mounting hole 9, be provided with damping hole 11 on the slide bar 10, valve opening 8 with oil inlet 3 passes through damping hole 11 is linked together.

The two ends of the main valve core 6 are acted by oil pressure, the first spring 7 only needs small rigidity to control the opening and closing of the main valve, and the direct-acting valve needs a hard spring with larger rigidity, so that the manual adjustment is difficult, and the valve core vibration is easily caused. Main valve core 6 cover is established in the periphery of transshipping disk seat 5, can play the effect of steady slip, avoids main valve core 6 to take place the skew and cause sealed bad.

As shown in fig. 4, an oil inlet cavity 12, a poppet 13 and a pressure regulating mechanism are arranged in the overload valve seat 5, a connecting hole 14 is formed in the left side of the oil inlet cavity 12, the oil inlet cavity 12 is communicated with the valve hole 8 through the connecting hole 14, the oil inlet cavity 12 is communicated with the oil outlet 4 through a flow guide hole, the poppet 13 and the pressure regulating mechanism are arranged in the oil inlet cavity 12, a frustum 15 is arranged on the poppet 13, the frustum 15 is in a conical shape with gradually shrinking outer diameter from right to left, and the pressure regulating mechanism pushes the poppet 13 leftwards to enable the frustum 15 to be tightly attached to an inner hole opening of the connecting hole 14.

When the hydraulic oil pressure-regulating valve works, the main valve core 6 is attached to an inner hole of the oil inlet 3 in a sealing mode, hydraulic oil flows into the valve cavity 2 through the damping hole 11 in the sliding rod 10 to enable the valve cavity 2 to be filled with the hydraulic oil, when the pressure of the oil inlet 3 is continuously increased, the pressure of the damping hole 11 and the pressure of the valve cavity 2 are correspondingly increased, the poppet valve core 13 is enabled to overcome the jacking force of the pressure regulating mechanism to move rightwards, the valve cavity 2 is enabled to be communicated with the oil inlet cavity 12, and the hydraulic oil flows into the oil outlet 4 through the connecting hole 14. At this time, due to the small hole throttling effect, a pressure difference is generated at two ends of the damping hole 11, when the resultant force of the pressure difference acting on the left area and the right area of the main valve element 6 is just balanced with the force of the first spring 7, the main valve element 6 is in a critical opening state, when the pressure of the oil inlet 3 is increased again, the flow through the damping hole 11 is increased again, and the pressure difference at two ends of the damping hole 11 overcomes the force of the first spring 7, so that the main valve element 6 is opened.

Pressure regulating mechanism includes lock nut 16, pressure regulating bolt 17 and second spring 18, be provided with in the overload disk seat 5 with pressure regulating bolt 17 matched with internal thread, second spring 18 is installed in the oil feed chamber 12, the left end of second spring 18 with poppet 13 fixed connection, pressure regulating bolt 17 is installed in the internal thread to can push up left the second spring 18, lock nut 16 is installed the right part of pressure regulating bolt 17. The precompression amount of the second spring 18 can be adjusted through the pressure adjusting bolt 17, so that the opening pressure of the poppet 13 can be adjusted, and the adjustment precision is high.

The outer wall of the sliding rod 10 and the inner hole wall of the mounting hole 9 are arranged in a sealing mode, a clamping table 19 is arranged on the sliding rod 10 and located on the right side of the mounting hole 9, the outer diameter of the clamping table 19 is larger than the inner diameter of the mounting hole 9, and the sliding rod 10 can move in the mounting hole 9 along the axial direction; a connecting rod part 20 is arranged on the poppet valve element 13 and positioned on the left side of the frustum 15, and the connecting rod part 20 is inserted into the connecting hole 14 from right to left. The dead circumstances of unexpected card can appear in the valve during operation, the dead problem of card of case all must be relieved through dismantling to the valve among the prior art, it is time and energy consuming, and the dismouting causes valve body 1 to damage easily, influence the leakproofness of valve body 1, when the unexpected card of poppet 13 in this scheme overload valve appears dies, only need right top push away slide bar 10, and make card platform 19 push away connecting rod portion 20 right, can relieve the card die state of poppet 13, and the operation is simple, the dismouting in-process damage valve body 1 has been avoided.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic representation of the term does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides an overload valve, includes valve body (1), be provided with valve pocket (2) in valve body (1), be equipped with oil inlet (3) on the left end face of valve body (1), be equipped with oil-out (4) on the lateral wall of valve body (1), oil inlet (3) with oil-out (4) pass through valve pocket (2) are linked together, its characterized in that: an overload valve seat (5) is arranged at the right part of the valve cavity (2), and the overload valve seat (5) is fixedly arranged in the valve cavity (2) and is arranged in a sealing way with the inner hole wall of the valve cavity (2);

a main valve core (6) is arranged in the valve cavity (2) and positioned on the left side of the overload valve seat (5), the main valve core (6) is arranged at an inner hole opening of the oil inlet (3) and can slide along the valve cavity (2), a first spring (7) is arranged between the overload valve seat (5) and the main valve core (6), and the first spring (7) pushes the main valve core (6) leftwards to enable a left conical surface of the main valve core (6) to be attached to the inner hole opening of the oil inlet (3) in a sealing mode;

the right part of main valve core (6) is equipped with valve opening (8), valve opening (8) cover is established the periphery of transshipping disk seat (5) left part can be followed the circumference of transshipping disk seat (5) is slided, the interior pore wall of valve opening (8) with the outer wall of transshipping disk seat (5) seals up and sets up, on main valve core (6), be located valve opening (8) left side is equipped with mounting hole (9), install slide bar (10) in mounting hole (9), be provided with damping hole (11) on slide bar (10), valve opening (8) with oil inlet (3) are passed through damping hole (11) are linked together.

2. An overload valve as claimed in claim 1 in which: be provided with oil feed chamber (12), poppet (13) and pressure regulating mechanism in overload disk seat (5), the left side of oil feed chamber (12) is equipped with connecting hole (14), oil feed chamber (12) with valve opening (8) are linked together through connecting hole (14), oil feed chamber (12) through the water conservancy diversion hole with oil-out (4) are linked together, poppet (13) and pressure regulating mechanism set up in oil feed chamber (12), be equipped with frustum (15) on poppet (13), the shape of frustum (15) is the toper that the external diameter shrinks gradually from right to left, pressure regulating mechanism pushes up to the left poppet (13) makes frustum (15) sealed laminating is in the hole mouth department of connecting hole (14).

3. An overload valve as claimed in claim 2 in which: pressure regulating mechanism includes lock nut (16), pressure regulating bolt (17) and second spring (18), be provided with in overload disk seat (5) with pressure regulating bolt (17) matched with internal thread, second spring (18) are installed in advance oil chamber (12), the left end of second spring (18) with poppet (13) fixed connection, pressure regulating bolt (17) are installed in the internal thread to can push up left the second spring (18), lock nut (16) are installed the right part of pressure regulating bolt (17).

4. An overload valve as claimed in claim 2 in which: the outer wall of the sliding rod (10) and the inner hole wall of the mounting hole (9) are arranged in a sealing mode, a clamping table (19) is arranged on the sliding rod (10) and located on the right side of the mounting hole (9), the outer diameter of the clamping table (19) is larger than the inner diameter of the mounting hole (9), and the sliding rod (10) can move in the mounting hole (9) along the axial direction; and a connecting rod part (20) is arranged on the left side of the frustum (15) of the poppet valve core (13), and the connecting rod part (20) is inserted into the connecting hole (14) from right to left.