CN212899939U - Anti-leakage overflow valve - Google Patents

Abstract

The utility model provides a leakage-proof overflow valve, including the safety valve pocket, be provided with valve pocket, oil inlet and overflow mouth on the safety valve pocket, oil inlet and overflow mouth are linked together through the valve pocket, be provided with case and control part in the valve pocket, the case can slide along the valve pocket, be equipped with the frustum on the case, the shape of frustum is the toper that the external diameter shrinks gradually from left to right, in the valve pocket, be located the left side of oil inlet is equipped with the taper hole, the interior pore wall of taper hole and the shape of the outer cone wall of frustum cooperate; the control part can push the valve core rightwards, so that the outer conical wall of the frustum is sealed and attached to the inner hole wall of the conical hole, the outer conical wall of the frustum and the inner hole wall of the conical hole are sealed in a hard sealing mode to replace a soft sealing mode in the prior art, the abrasion resistance of the mechanism is improved, the sealing effect can be guaranteed, the service life is prolonged, and meanwhile the high-temperature environment can be adapted.

Description

Anti-leakage overflow valve

Technical Field

The utility model relates to a hydraulic component makes the field, especially relates to a prevent leaking overflow valve.

Background

The overflow valve is a pressure device commonly used in the hydraulic field, is called as a safety valve in some occasions, mainly has the functions of constant-pressure overflow, pressure stabilization maintaining, system unloading and safety protection, can adjust the system pressure, unloads the pipeline pressure, and is widely applied.

In the overflow valve in the prior art, soft sealing modes such as an O-shaped ring are generally adopted between the valve core and the valve sleeve, and during work, because a small gap exists between the valve core and the valve sleeve, an extrusion gap can occur in the O-shaped ring, so that the trimming of the O-shaped ring is caused, and the sealing effect and the service life are influenced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is that soft sealed modes such as O type circle are generally adopted between the case of the overflow valve among the prior art and the valve barrel, because there is small clearance between case and the valve barrel, crowded crack can appear in O type circle, and then causes O type circle to cut edge, influences sealed effect and life, the utility model provides a prevent leaking the overflow valve and solve above-mentioned problem.

The utility model provides a technical scheme that its technical problem adopted is: a leakage-proof overflow valve comprises a safety valve sleeve, wherein a valve cavity is arranged in the safety valve sleeve, an oil inlet and an overflow port are also arranged on the safety valve sleeve, the oil inlet and the overflow port are communicated through the valve cavity, a valve core and a control part are arranged in the valve cavity, the valve core can slide along the valve cavity, a frustum is arranged on the valve core, the shape of the frustum is a cone with the outer diameter gradually shrinking from left to right, a cone hole is arranged on the left side of the oil inlet in the valve cavity, and the inner hole wall of the cone hole is matched with the outer cone wall of the frustum in shape; the control part can push the valve core rightwards, so that the outer conical wall of the frustum is attached to the inner hole wall of the conical hole in a sealing mode.

Further: the control part includes pressure regulating bolt, first spring and spring holder, the spring holder is fixed to be set up the left side of case, first spring mounting is in the valve pocket, the right-hand member of first spring with the spring holder is connected, be equipped with in the valve pocket with pressure regulating bolt's external screw thread matched with internal thread, pressure regulating bolt installs in the internal thread to can push up right first spring.

Further: a guide rod coaxial with the frustum is arranged on the valve core and positioned on the right side of the frustum; in the valve cavity, a guide hole matched with the guide rod is formed in the right side of the taper hole, the guide hole and the taper hole are coaxially arranged, and the guide rod is inserted into the guide hole and can axially move in the guide hole.

Further: the control part still includes the second spring, the second spring is worn to establish inside the first spring, the second spring revolve to with the spiral of first spring sets up to the opposite, the right-hand member of second spring with the spring holder (be connected, the pressure regulating bolt can push up right the second spring.

The beneficial effects of the utility model are that, the utility model relates to a prevent leaking the overflow valve through set up the frustum on the case to set up in frustum matched with taper hole on the valve barrel, the outer conical wall through the frustum replaces the soft sealing mode among the prior art with the interior pore wall hard sealing mode of taper hole, has improved the resistance to wear of mechanism, can prevent that fluid from leaking, guarantees sealed effect, increase of service life can adapt to high temperature environment simultaneously.

Drawings

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

Fig. 1 is a schematic structural view of the leakage-proof overflow valve of the present invention.

In the figure, 1, a safety valve sleeve, 2, a valve cavity, 3, an oil inlet, 4, an overflow port, 5, a valve core, 6, a frustum, 7, a taper hole, 8, a pressure regulating bolt, 9, a first spring, 10, a spring seat, 11, a guide rod, 12 and a guide hole are arranged.

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, the utility model provides a leakage-proof overflow valve, including safety valve barrel 1, be provided with valve pocket 2 in the safety valve barrel 1, still be provided with oil inlet 3 and overflow mouth 4 on the safety valve barrel 1, oil inlet 3 and overflow mouth 4 are linked together through the valve pocket 2, be provided with case 5 and control part in the valve pocket 2, the case 5 can slide along the valve pocket 2, be equipped with frustum 6 on the case 5, the shape of frustum 6 is the toper that shrinks gradually from left to right external diameter, in the valve pocket 2, be located the left side of oil inlet 3 and be equipped with taper hole 7, the interior pore wall of taper hole 7 and the shape of the outer conical wall of frustum 6 cooperate; the control part can push the valve core 5 rightwards, so that the outer conical wall of the frustum 6 is tightly attached to the inner hole wall of the conical hole 7.

When the oil way is accessed, the control part pushes the valve core 5 rightwards, so that the frustum 6 is sealed in the taper hole 7, and the channels of the oil inlet 3 and the overflow port 4 are closed; when oil flows into the oil path and the pressure is gradually increased, pressure oil enters from the oil inlet 3, under the action of the oil hydraulic pressure, the oil in the oil inlet 3 pushes the valve core 5 leftwards and overcomes the action of the control part to enable the valve core 5 to move leftwards, the frustum 6 is far away from the taper hole 7, a channel between the oil inlet 3 and the overflow port 4 is opened, the oil flows out from the overflow port 4, and the overflow valve plays the roles of pressure maintaining and overload overflow at the moment.

In the prior art, the mode of O-shaped ring soft sealing is generally adopted between the valve core 5 and the valve sleeve, and in the work process, because a small gap exists between the valve core 5 and the valve sleeve, an extruding gap can appear in the O-shaped ring, so that the O-shaped ring trimming is caused, the sealing effect is influenced, the conical surface hard sealing mode is adopted between the upper conical table 6 of the valve core 5 and the conical hole 7 in the valve cavity 2, the abrasion resistance is improved, the high-temperature environment can be adapted, the sealing effect is ensured, and the service life is prolonged.

The control part includes pressure regulating bolt 8, first spring 9 and spring holder 10, spring holder 10 is fixed to be set up the left side of case 5, first spring 9 is installed in valve chamber 2, the right-hand member of first spring 9 with spring holder 10 is connected, be equipped with in the valve chamber 2 with the external screw thread matched with internal thread of pressure regulating bolt 8, pressure regulating bolt 8 is installed in the internal thread to can push up right first spring 9.

The degree of external threads in the valve cavity 2 is adjusted by adjusting the pressure adjusting bolt 8, and then the precompression quantity of the first spring 9 is adjusted, so that the opening pressure of the valve core 5 can be controlled.

A guide rod 11 coaxial with the frustum 6 is arranged on the valve core 5 and positioned on the right side of the frustum 6; in the valve cavity 2, a guide hole 12 matched with the guide rod 11 is arranged on the right side of the taper hole 7, the guide hole 12 and the taper hole 7 are coaxially arranged, and the guide rod 11 is inserted into the guide hole 12 and can axially move in the guide hole 12. The cooperation of guide bar 11 and guiding hole 12 can play the effect of steady slip, avoids case 5 to take place the skew and cause sealed bad and card dead phenomenon.

The control part still includes the second spring, the second spring is worn to establish inside the first spring 9, the second spring revolve to with the first spring 9 revolve to opposite setting, the right-hand member of second spring with the spring holder 10 is connected, pressure regulating bolt 8 can push up right the second spring. Through setting up two springs, can increase the compression rigidity of control portion, the opposite setting of the spiral direction of two springs can avoid blocking between two spring wires.

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 (4)

1. The utility model provides a prevent leaking overflow valve, includes safety valve barrel (1), be provided with valve pocket (2) in safety valve barrel (1), still be provided with oil inlet (3) and overflow mouth (4) on safety valve barrel (1), oil inlet (3) and overflow mouth (4) pass through valve pocket (2) are linked together, its characterized in that: a valve core (5) and a control part are arranged in the valve cavity (2), the valve core (5) can slide along the valve cavity (2), a frustum (6) is arranged on the valve core (5), the frustum (6) is in a conical shape with the outer diameter gradually shrinking from left to right, a conical hole (7) is arranged on the left side of the oil inlet (3) in the valve cavity (2), and the inner hole wall of the conical hole (7) is matched with the outer conical wall of the frustum (6) in shape; the control part can push the valve core (5) rightwards, so that the outer conical wall of the frustum (6) is tightly attached to the inner hole wall of the conical hole (7).

2. A leak-proof relief valve as defined in claim 1, further comprising: the control part includes pressure regulating bolt (8), first spring (9) and spring holder (10), spring holder (10) are fixed to be set up the left side of case (5), install first spring (9) in valve pocket (2), the right-hand member of first spring (9) with spring holder (10) are connected, be equipped with in valve pocket (2) with the external screw thread matched with internal thread of pressure regulating bolt (8), install pressure regulating bolt (8) in the internal thread to can push up right the top first spring (9).

3. A leak-proof relief valve as defined in claim 1, further comprising: a guide rod (11) coaxial with the frustum (6) is arranged on the valve core (5) and positioned on the right side of the frustum (6); in the valve cavity (2), a guide hole (12) matched with the guide rod (11) is formed in the right side of the taper hole (7), the guide hole (12) and the taper hole (7) are coaxially arranged, and the guide rod (11) is inserted into the guide hole (12) and can axially move in the guide hole (12).

4. A leak-proof relief valve as defined in claim 2, further characterized by: the control part still includes the second spring, the second spring is worn to establish inside first spring (9), the revolve of second spring to with the revolve of first spring (9) sets up to the opposite, the right-hand member of second spring with spring holder (10) are connected, pressure regulating bolt (8) can push up right the second spring.

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