A bidirectional pressure step valve

Abstract

The utility model discloses a two -way pressure step valve, including the outer shell, first valve core, second valve core, first spring and second spring, the outer shell is inside two ends respectively and is seted up with first opening and second opening, is equipped with the movable joint cavity in the outer shell, one end of this first valve core is equipped with the first limit part, the other end fixedly connected with second limit part of this first valve core, the center of second valve core is fixed and is seted up with the sliding connection chamber, this first valve core sliding installation is in the sliding connection chamber, and second limit part also is equipped in the sliding connection chamber, be equipped with first spring in the sliding connection chamber, first spring sliding sleeve is equipped in the outer ring surface of first valve core, one end of second valve core is equipped with third limit part, and the one end of second valve core near second opening is seted up with the liquid inlet hole of the communication second opening and sliding connection chamber, the utility model discloses through the different flow passage and realizes the hydraulic supply of different directions, and through the size cooperation of two end opening diameters different flow passage, realizes the regulation and control of different pressure.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic valves, and more specifically, to a bidirectional pressure step valve. Background Technology

[0002] In hydraulic systems, various valve bodies are required to meet the needs of the hydraulic system. Existing two-way valves are generally valve bodies with the same opening at both ends and a single flow path. In some special cases, when it is necessary to deliver in different directions, the hydraulic pressure needs to be different. Therefore, a new type of two-way pressure valve is needed. Utility Model Content

[0003] The main objective of this invention is to provide a bidirectional pressure step valve for achieving slow drainage in the event of a pipeline rupture.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a bidirectional pressure step valve, comprising a housing, a first valve core, a second valve core, a first spring, and a second spring. The housing has a first opening and a second opening at both ends, and a movable connecting cavity for linear movement of the valve core is provided inside the housing. One end of the first valve core has a first limiting part, and the other end of the first valve core is fixedly connected to a second limiting part. A sliding connecting cavity is fixedly provided at the center of the second valve core. The first valve core is slidably installed in the sliding connecting cavity, and the second limiting part is also provided in the sliding connecting cavity. A first spring is provided in the sliding connecting cavity, and the first spring is slidably sleeved on the outer ring surface of the first valve core. One end of the second valve core has a third limiting part, and the end of the second valve core near the second opening has an inlet hole that connects the second opening and the sliding connecting cavity.

[0005] Furthermore, the outer casing includes a first housing and a second housing, which are fixedly connected by threads, and a sealing element is provided between the first housing and the second housing.

[0006] Furthermore, the first limiting part of the first valve core is tightly fitted and connected to the opening of the sliding connection cavity of the second valve core.

[0007] Furthermore, the inner ring surface of the movable connecting cavity is provided with a connecting inclined surface, and the outer ring surface of the third limiting part is provided with a connecting inclined surface that slides and matches the connecting inclined side.

[0008] Furthermore, the diameter of the first opening is smaller than the diameter of the second opening.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0010] This utility model features a stepped double valve core that allows for different hydraulic flow paths in different directions to meet the needs of hydraulic systems. At the same time, the different sizes of the openings at both ends enable better control of hydraulic pressure. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0012] Reference numerals: 1. Outer shell; 2. First valve core; 3. Second valve core; 4. First spring; 5. Second spring; 6. Movable connecting cavity; 7. First limiting part; 8. Second limiting part; 9. Sliding connecting cavity; 10. Third limiting part; 11. First housing; 12. Second housing; 13. Seal; 14. Connecting slope; 15. Liquid inlet. Detailed Implementation

[0013] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0014] See the examples. Figure 1 As shown, a bidirectional pressure step valve includes a housing, a first valve core, a second valve core, a first spring, and a second spring. The housing has a first opening and a second opening at both ends, and a movable connecting cavity for linear movement of the valve core. One end of the first valve core has a first limiting portion, and the other end is fixedly connected to a second limiting portion. A sliding connecting cavity is fixedly opened at the center of the second valve core, and the first valve core is slidably installed within the sliding connecting cavity. The second limiting portion is also located within the sliding connecting cavity. A first spring is provided within the sliding connecting cavity and is slidably sleeved on the outer ring surface of the first valve core. One end of the second valve core has a third limiting portion, and the end of the second valve core adjacent to the second opening has an inlet hole connecting the second opening and the sliding connecting cavity.

[0015] The outer casing includes a first casing and a second casing, which are fixedly connected by threads, and a sealing element is provided between the first casing and the second casing.

[0016] The first limiting part of the first valve core is tightly fitted and connected to the opening of the sliding connecting cavity of the second valve core. The inner ring surface of the movable connecting cavity is provided with a connecting slope, and the outer ring surface of the third limiting part is provided with a connecting slope that slides and matches the connecting slope.

[0017] When hydraulic oil enters through the first opening, it pushes the first and second valve cores together towards the second opening. The hydraulic oil flows through the outer ring of the second valve core towards the second opening. A sliding guide portion is provided on the outer ring surface of the second valve core near the second opening, with a guide hole connecting its two ends. When the hydraulic supply stops, the first and second valve cores return to their original positions due to the spring force of the second spring. When hydraulic oil enters through the second opening, it pushes the first valve core towards the first opening, thus creating a gap between the first and second valve cores for hydraulic oil flow, allowing hydraulic oil to flow in the other direction. The diameter of the first opening is smaller than the diameter of the second opening.

[0018] Different hydraulic pressures at both ends are achieved by using two openings of different diameters; the pressure is greater when liquid enters through the larger diameter opening than when liquid enters through the smaller diameter opening.

[0019] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A bidirectional pressure step valve, comprising a housing, a first valve core, a second valve core, a first spring, and a second spring, characterized in that: The outer casing has a first opening and a second opening at both ends, and a movable connecting cavity for linear movement of the valve core. One end of the first valve core has a first limiting part, and the other end of the first valve core is fixedly connected to a second limiting part. A sliding connecting cavity is fixedly opened at the center of the second valve core. The first valve core is slidably installed in the sliding connecting cavity, and the second limiting part is also located in the sliding connecting cavity. A first spring is provided in the sliding connecting cavity, and the first spring is slidably sleeved on the outer ring surface of the first valve core. One end of the second valve core has a third limiting part, and the end of the second valve core near the second opening has an inlet hole that connects the second opening and the sliding connecting cavity.

2. The bidirectional pressure step valve according to claim 1, characterized in that: The outer casing includes a first casing and a second casing, which are fixedly connected by threads, and a sealing element is provided between the first casing and the second casing.

3. The bidirectional pressure step valve according to claim 1, characterized in that: The first limiting part of the first valve core is tightly fitted and connected to the opening of the sliding connection cavity of the second valve core.

4. A bidirectional pressure step valve according to claim 1, characterized in that: The inner ring surface of the movable connecting cavity is provided with a connecting inclined surface, and the outer ring surface of the third limiting part is provided with a connecting inclined surface that slides and matches the connecting inclined side.

5. A bidirectional pressure step valve according to claim 1, characterized in that: The diameter of the first opening is smaller than the diameter of the second opening.

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