Bidirectional plunger valve capable of being actively and orderly opened and closed

Abstract

A bidirectional plunger valve capable of being actively and orderly opened and closed comprises a valve body, paired valve elements are arranged on the valve body, each valve element is installed on a valve rod, a cam is installed on the upper portion of the valve body, and the cam is driven by a driving device to rotate. A pull rod is fixed on the corresponding valve rod; one end of the pull rod extends into the annular slide way of the cam; when the cam rotates, the pull rod drives the valve element to actively move up and down to complete opening and closing. According to the bidirectional plunger valve capable of being opened and closed actively and orderly, the two valve elements can be opened and closed actively and orderly.

Description

Technical Field

[0001] The utility model relates to a two-way plunger valve, in particular to a two-way plunger valve which can be opened and closed actively and orderly. Background Art

[0002] The valve core switching sequence of the existing two-way plunger valve is that the supply and return oil valve cores of the main and auxiliary oil tanks are opened and closed at the same time. Due to the existence of a certain pressure in the oil circuit system, the speed of opening one valve core is slightly slower than the speed of closing the other valve core. At this time, the oil circuit diameter is reduced during the valve core switching process. At the same time, the pressure of the oil circuit system will increase as the oil circuit diameter decreases during the valve core switching process. This may cause the valve core to be closed during the valve core switching process, while the other valve core cannot open the oil circuit in time due to the influence of the return spring on the oil circuit system pressure, resulting in the simultaneous closure of the return oil circuits of the main and auxiliary oil tanks, and then the valve body is damaged due to the inability to release the return oil pressure. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a two-way plunger valve which can be opened and closed actively and orderly, and can avoid being affected by the pressure of the oil circuit system, so as to realize active and orderly opening and closing.

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

[0005] A two-way plunger valve that can be opened and closed actively and orderly comprises a valve body, on which a pair of valve cores are arranged, each valve core is mounted on a valve stem, a cam is mounted on the upper part of the valve body, and the cam is driven to rotate by a driving device; a pull rod is fixed on the corresponding valve stem, and one end of the pull rod extends into an annular slideway of the cam; when the cam rotates, the pull rod drives the valve core to actively move up and down to complete opening and closing.

[0006] The annular slide includes an upper horizontal slide, a lower horizontal slide, a downward pressure slide and an upward lifting slide. The upper horizontal slide, the lower horizontal slide, the downward pressure slide and the upward lifting slide are smoothly transitionally connected. The spacing between the upper horizontal slide and the lower horizontal slide matches the designed opening and closing distance of the valve core.

[0007] The utility model provides a two-way plunger valve that can be opened and closed actively and orderly, and has the following technical effects:

[0008] 1) The annular slideway is equipped with a downward pressing slideway and an upward lifting slideway, and cooperates with the pull rod on the valve stem to realize the up and down movement of the valve core, the valve stem and the pull rod as the cam rotates, thereby realizing the active opening and closing of the valve core.

[0009] 2) Through the reasonable design of the angle and position of the inclined surface of the annular slide, the two valve cores can be opened and closed sequentially in the mechanical structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0012] Figure 2 for Figure 1 Longitudinal cross-sectional view of .

[0013] Figure 3 This is a schematic diagram of the cooperation between the pull rod and the cam in the utility model (first perspective).

[0014] Figure 4 This is a schematic diagram of the cooperation between the pull rod and the cam in the utility model (second viewing angle).

[0015] Figure 5 The figure is a motion trajectory diagram of the valve core during one rotation of the cam in the utility model.

[0016] In the figure: valve body 1, valve core 2, first valve core 2.1, second valve core 2.2, valve stem 3, first valve stem 3.1, second valve stem 3.2, pull rod 4, cam 5, annular slide 6, upper horizontal slide 6.1, lower horizontal slide 6.2, lower pressure slide 6.3, upper lift slide 6.4. DETAILED DESCRIPTION

[0017] like Figure 1-5 As shown, a bidirectional plunger valve that can be opened and closed actively and orderly includes a valve body 1, in which two groups of valve cores 2 (a first valve core 2.1 and a second valve core 2.2) are arranged, and each group of valve cores 2 is connected to a corresponding valve stem 3, that is, the first valve core 2.1 is connected to the first valve stem 3.1, and the second valve core 2.2 is connected to the second valve stem 3.2. The first valve core 2.1 controls the opening and closing of the main and auxiliary oil supply passages. The second valve core 2.2 controls the opening and closing of the main and auxiliary oil return passages. In order to realize the active opening and closing of the first valve core 2.1 and the second valve core 2.2, a cam 5 is installed on the upper part of the valve body 1, and the cam 5 can be driven to rotate by other driving devices. An annular slide 6 is arranged on the side wall of the cam 5. In addition, a pull rod 4 is horizontally installed on the upper ends of the first valve stem 3.1 and the second valve stem 3.2. The other end of the pull rod 4 can extend into the annular slide 6.

[0018] The annular slideway 6 here consists of four parts, including an upper horizontal slideway 6.1, a lower horizontal slideway 6.2, a downward pressing slideway 6.3, and an upward lifting slideway 6.4. When the cam 5 rotates, the pull rod 4 passes through the four parts of the annular slideway 6 to achieve upward lifting or downward pressing, and the pull rod 4 drives the first valve stem 3.1 and the second valve stem 3.2 to move, thereby realizing the sequential opening and closing of the first valve core 2.1 and the second valve core 2.2 connected at the lower part.

[0019] Working principle and process: Since an annular slide 6 is provided on the cam 5, the annular slide 6 has an upward slide 6.4 and a downward slide 6.3, by rotating the cam 5, the pull rod 4 can drive the first valve core 2.1 and the second valve core 2.2 to perform two-way active movement (opening and closing) under the control of the cam 5.

[0020] like Figure 3 , Figure 4 , Figure 5 As shown, in the initial state, the pull rod 4 is at the lower horizontal slide 6.2, at which time the first valve core 2.1 and the second valve core 2.2 are in a simultaneously pressed down state, the auxiliary oil tank oil supply passage and the auxiliary oil tank oil return passage are both in an open state, and the first valve core 2.1 and the second valve core 2.2 are 60° apart.

[0021] When the cam 5 rotates 55°, the pull rod 4 where the first valve core 2.1 is located begins to enter the lifting slide 6.4, thereby driving the first valve core 2.1 to open the main tank oil supply passage and close the auxiliary tank oil supply passage.

[0022] When the cam 5 continues to rotate to 115°, the first valve core 2.1 completely enters the upper horizontal slideway 6.1; at the same time, the second valve core 2.2 begins to enter the upper lift slideway 6.4, thereby driving the second valve core 2.2 to open the main tank oil return passage and close the auxiliary tank oil return passage.

[0023] When the cam 5 continues to rotate to 175°, the first valve core 2.1 and the second valve core 2.2 are completely in the upper horizontal slideway 6.1 at the same time. At this time, the valve core is in an upward pressure state, the auxiliary oil tank supply and return oil passages are closed, and the main oil tank supply and return oil passages are opened at the same time.

[0024] When the cam 5 continues to rotate to 245°, the pull rod 4 where the first valve core 2.1 is located begins to enter the downward slideway 6.3, thereby driving the first valve core 2.1 to open the auxiliary tank oil supply passage and close the main tank oil supply passage.

[0025] When the cam 5 continues to rotate to 305°, the pull rod 4 where the second valve core 2.2 is located begins to enter the downward slideway 6.3, thereby driving the second valve core 2.2 to press down and open the auxiliary oil tank return passage, and close the main oil tank return passage.

[0026] In this way, the traditional passive spring rebound reset is changed into an active slide pull-up. Through the reasonable design of the upper lift slide 6.4 and the lower pressure slide 6.3, the double valve core can be opened and closed sequentially in the mechanical structure.

Claims

1. A bidirectional plunger valve capable of active and orderly opening and closing, comprising a valve body (1), on which a pair of valve cores (2) are arranged, each valve core (2) being mounted on a corresponding valve stem (3), characterized in that: A cam (5) is mounted on the upper part of the valve body (1), and the cam (5) is driven to rotate by a driving device; a pull rod (4) is fixed to the corresponding valve stem (3), and one end of the pull rod (4) extends into the annular slideway (6) of the cam (5); when the cam (5) rotates, the pull rod (4) drives the paired valve cores (2) to actively move up and down to complete sequential opening and closing.

2. A two-way plunger valve capable of active and orderly opening and closing according to claim 1, characterized in that: The annular slideway (6) comprises an upper horizontal slideway (6.1), a lower horizontal slideway (6.2), a downward pressure slideway (6.3) and an upward lifting slideway (6.4), and the spacing between the upper horizontal slideway (6.1), the lower horizontal slideway (6.2), the downward pressure slideway (6.3) and the upward lifting slideway (6.4) matches the designed opening and closing distance of the valve core.

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