A bidirectional oil passage one-way valve

Abstract

The utility model discloses a bidirectional oil circulation one-way valve, including valve body, valve core, valve seat and valve rod, be provided with valve seat in the valve body, and the valve core is connected with the valve seat of valve seat open end, and be provided with second reset spring between valve core and valve seat, the valve rod is connected with the valve core of valve core middle through -hole, and be provided with first reset spring between valve rod and valve core. The utility model discloses a bidirectional oil circulation one-way valve function is realized through setting up double -guide valve core structure in the valve body, and the direction of flow is switched automatically through pressure difference, has realized.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic technology, and in particular to a bidirectional oil-passing one-way valve. Background Technology

[0002] Traditional check valves only allow unidirectional flow and shut off in the reverse direction. In hydraulic systems where bidirectional flow is required but unidirectional shut-off is necessary, multiple check valves must be combined to form a bridge circuit, resulting in complex structure and large pressure loss. Utility Model Content

[0003] To address the problem that existing traditional check valves only allow one-way flow, this invention provides a bidirectional oil-passing check valve.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A bidirectional oil-passing one-way valve includes a valve body, a valve core, a valve seat, and a valve stem; the valve body is provided with a valve seat, the valve core is sleeved on the open end of the valve seat, and a second return spring is provided between the valve core and the valve seat; the valve stem is sleeved in the middle through hole of the valve core, and a first return spring is provided between the valve stem and the valve core.

[0005] Preferably, the valve core has an outer conical surface at the end away from the valve seat, which forms a line seal with the sharp corner of the valve body step on the valve body, thus separating the valve body oil passage into an outer oil passage and an inner oil passage.

[0006] Preferably, the end of the valve stem away from the valve seat is provided with an outer conical surface, which forms a line seal with the valve core step tip provided on the valve core, sealing the through hole in the middle of the valve core.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model realizes the function of a two-way oil passage one-way valve by setting a double guide valve core structure inside the valve body and automatically switching the flow direction by pressure difference. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the internal main structure of an embodiment of the present utility model; Figure 2 for Figure 1 An enlarged diagram of A in the diagram.

[0009] In the figure: 1. Valve core, 101. Valve core step angle, 102. Valve core outer conical surface, 2. Valve stem, 201. Valve stem outer conical surface, 3. First return spring, 4. Second return spring, 5. Valve seat, 6. Valve body, 601. Valve body step angle. Detailed Implementation

[0010] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0012] like Figures 1 to 2 As shown, this utility model embodiment includes a valve body, a valve core, a valve seat, and a valve stem. A valve seat is disposed within the valve body, and a valve core is sleeved on the open end of the valve seat. A second return spring is disposed between the valve core and the valve seat. A valve stem is sleeved within the through hole in the middle of the valve core, and a first return spring is disposed between the valve stem and the valve core. An outer conical surface is disposed at the end of the valve core away from the valve seat, forming a line seal with the sharp corner of the valve body step on the valve body, thus dividing the valve body oil passage into an outer oil passage and an inner oil passage. An outer conical surface is disposed at the end of the valve stem away from the valve seat, forming a line seal with the sharp corner of the valve core step on the valve core, thus sealing the through hole in the middle of the valve core.

[0013] When the oil pressure in the outer oil passage is greater than the pressure in the inner oil passage, the oil pressure pushes the valve core 1 to move to the right against the spring force of the second return spring 4. The valve stem 2 also moves to the right synchronously with the valve core 1 under the action of the pressure in the outer oil passage. When the valve core 1 moves to the right, the line seal formed by the valve body step tip 601 and the valve core outer cone surface 102 in the valve core 1 opens, and the oil flows unidirectionally from the outer oil passage to the inner oil passage. When the oil pressure in the outer oil passage decreases and is less than the spring force of the second return spring 4, the valve core 1 moves to the left under the action of the spring force of the second return spring 4 until the valve core outer cone surface 102 and the valve body step tip 601 form a line seal, cutting off the unidirectional flow of the outer oil passage to the inner oil passage.

[0014] When the oil pressure in the inner oil passage is greater than that in the outer oil passage, the inner oil pressure acts on the outer conical surface 201 of the valve stem. The valve stem 2 moves to the left against the spring force of the first return spring 3, and the line seal between the outer conical surface 201 of the valve stem and the valve core step tip 102 is opened, realizing unidirectional flow of oil from the inner oil passage to the outer oil passage. When the oil pressure in the inner oil passage decreases and is less than the spring force of the first return spring 3, the valve stem 2 moves to the right under the force of the first return spring 3 until the outer conical surface 201 of the valve stem and the valve core step tip 102 form a line seal, cutting off the unidirectional flow of oil from the inner oil passage to the outer oil passage.

[0015] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bidirectional oil-passing check valve, characterized in that: The valve includes a valve body, a valve core, a valve seat, and a valve stem. The valve body contains a valve seat, and the valve core is sleeved on the open end of the valve seat. A second return spring is provided between the valve core and the valve seat. The valve stem is sleeved in the middle through hole of the valve core, and a first return spring is provided between the valve stem and the valve core. The end of the valve core away from the valve seat has an outer conical surface, which forms a line seal with the sharp corner of the valve body step on the valve body, separating the valve body oil passage into an outer oil passage and an inner oil passage.

2. The bidirectional oil-passing check valve according to claim 1, characterized in that: The valve stem has an outer conical surface at the end away from the valve seat, which forms a line seal with the valve core step sharp corner on the valve core, sealing the through hole in the middle of the valve core.

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