Cushion valve used in pressure relief oil way

Abstract

The cushion valve comprises a valve body, the valve body is arranged in front of a pressure relief valve, the front end of the valve body is backwards provided with a first groove body, the rear end of the first groove body is backwards provided with a second groove body, and the rear end of the second groove body is backwards provided with a third groove body in a penetrating mode. A cylindrical check block is placed at the position of the second groove body, the diameter of the cross section of the check block is 1-2 mm smaller than that of the cross section of the second groove body, and a groove is formed in the rear end face of the check block in the radial direction of the check block. In the pressure relief oil way, oil liquid firstly reaches the valve body through the oil pipe, after the oil liquid encounters the check block, the check block can effectively achieve the pressure relief effect, the oil liquid can continue to move forwards from a gap between the check block and the second groove body and enters the third groove body through the groove, and in the process, the oil liquid enters the third groove body through the groove. And large impurities carried in the oil liquid can be blocked at the first tank body.

Description

Technical Field

[0001] The utility model relates to the technical field of buffer valves, in particular to a buffer valve used in a pressure relief oil circuit. Background Art

[0002] The pressure relief oil circuit usually refers to a part of the hydraulic system that is used to reduce pressure and remove residual oil pressure to ensure system safety and normal operation. The valve core of the pressure relief valve in the pressure relief oil circuit is easily damaged due to the long-term high pressure from the oil circuit; and because of its (valve core) aperture is small, it is easy to get blocked when large impurities pass through. Due to the above reasons, in actual use, the valve core needs to be frequently removed for cleaning or replacement, which is troublesome. Utility Model Content

[0003] The present application provides a buffer valve for use in a pressure relief oil circuit, which can solve the problem that the valve core of the pressure relief valve in the pressure relief oil circuit is easily damaged and easily clogged due to being subjected to high pressure for a long time.

[0004] In the present application, a buffer valve for a pressure relief oil circuit is provided, including a valve body. In the pressure relief oil circuit, the valve body is arranged in front of the pressure relief valve, and a first groove body is opened backwards from the front end of the valve body, and the first groove body is connected with the oil pipe at the front end, and a second groove body is opened backwards from the rear end of the first groove body, and the second groove body is connected with the first groove body, the cross-section of the second groove body is circular and the cross-sectional area of ​​the second groove body is smaller than that of the first groove body, and a third groove body is opened backwards from the rear end of the second groove body, and the rear end of the third groove body is connected with the oil pipe at the rear end, and the cross-sectional area of ​​the third groove body is smaller than that of the second groove body; a cylindrical stopper is placed at the second groove body, and the cross-sectional diameter of the stopper is 1-2 mm smaller than the cross-sectional diameter of the second groove body, and a groove is arranged on the rear end surface of the stopper along its radial direction, and the two ends of the groove extend to the side walls on both sides of the stopper respectively.

[0005] By adopting the above technical solution, in the pressure relief oil circuit, the oil first reaches the valve body through the oil pipe. After encountering the block, the block can effectively reduce the pressure, and the oil will continue to move forward from the gap between the block and the second tank body, and enter the third tank body through the groove. In this process, larger impurities carried in the oil will be blocked in the first tank body.

[0006] In one embodiment, the cross section of the first trough body is circular.

[0007] The adoption of the above technical solution makes it easier to set the connection between it and the oil pipe.

[0008] In one embodiment, the cross section of the third slot body is circular, and the diameter of the cross section is greater than the slot width of the stopper.

[0009] By adopting the above technical solution, the oil flows into the third tank body more smoothly through the groove.

[0010] In summary, in the present application, a buffer valve used in a pressure relief oil circuit has the following beneficial effects compared to the prior art: it can effectively reduce the pressure of the oil before it reaches the pressure relief valve, and it can also block larger impurities to prevent clogging of the valve core of the pressure relief valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0012] Figure 1 The overall structural view of a buffer valve used in a pressure relief oil circuit;

[0013] Figure 2 is a front view of the valve body;

[0014] Figure 3 for Figure 2 Sectional view along AA;

[0015] Figure 4 It is a three-dimensional diagram of the stopper.

[0016] In the figure, 1, valve body; 2, first tank body; 3, second tank body; 4, third tank body; 6, oil pipe; 7, stopper; 8, groove. DETAILED DESCRIPTION

[0017] The following is a further description of the specific implementation of the utility model in conjunction with the accompanying drawings; the following embodiments are used to illustrate the utility model, but are not used to limit the scope of the utility model. The described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0018] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by those skilled in the art in the ordinary sense. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] See also Figure 1 A buffer valve for use in a pressure relief oil circuit includes a valve body 1, which is generally cylindrical in shape and is made of cast iron, carbon steel or stainless steel. In the pressure relief oil circuit, the valve body 1 is arranged before the pressure relief valve, and the oil in the oil pipe 6 first passes through the valve body 1 and then reaches the pressure relief valve.

[0020] See also Figure 1 The front end of the valve body 1 is provided with a first slot body 2, which is connected to the oil pipe 6 at the front end through a conventional sealing method. In one embodiment, the cross section of the first slot body 2 is circular, which makes it easier to set the connection between it and the oil pipe 6 (threads can be set on the inner wall of the first slot body 2, connected to the oil pipe 6 through threaded connection, and a sealing gasket can be added. The specific structure can refer to the conventional pipe connection method in the field, which will not be described in detail here).

[0021] See also Figure 1 , Figure 2 , Figure 3 A second slot body 3 is opened at the rear end of the first slot body 2, the second slot body 3 is connected to the first slot body 2, the central axes of the first slot body 2 and the second slot body 3 coincide, the cross-section of the second slot body 3 is circular and the cross-sectional area of ​​the second slot body 3 is smaller than that of the first slot body 2.

[0022] See also Figure 3 A third trough body 4 is provided through the rear end of the second trough body 3, and the rear end of the third trough body 4 is connected to the rear end oil pipe 6 through a conventional sealing method. The central axis of the third trough body 4 coincides with that of the second trough body 3, and the cross-sectional area of ​​the third trough body 4 is smaller than that of the second trough body 3.

[0023] See also Figure 3 , Figure 4, a cylindrical stopper 7 is placed at the second tank body 3, and the cross-sectional diameter of the stopper 7 is 1mm smaller than that of the second tank body 3, so that a gap is left between the second tank body 3 and the stopper 7, and a groove 8 is arranged on the rear end surface of the stopper 7 along its radial direction, and the two ends of the groove 8 extend to the side walls on both sides of the stopper 7 respectively. In the pressure relief oil circuit, the oil first reaches the valve body 1 through the oil pipe 6, and after encountering the stopper 7, the stopper 7 will be pushed forward by the impact of the oil, and the stopper 7 can effectively play a role in decompression. And the oil will continue to move forward from the gap between the stopper 7 and the second tank body 3, and enter the third tank body 4 through the groove 8. In this process, the larger impurities carried in the oil will be blocked at the first tank body 2.

[0024] See also Figure 3 , Figure 4 In one embodiment, the cross-section of the third groove body 4 is circular, and its cross-sectional diameter is larger than the groove width of the block 7. With this arrangement, the oil flows into the third groove body 4 through the groove 8 more smoothly.

Claims

1. A buffer valve used in a pressure relief oil circuit, characterized in that: The invention comprises a valve body (1), wherein the valve body (1) is arranged before the pressure relief valve in the pressure relief oil circuit, the front end of the valve body (1) is provided with a first groove body (2) backward, the first groove body (2) is connected with the oil pipe (6) at the front end, the rear end of the first groove body (2) is provided with a second groove body (3) backward, the second groove body (3) is connected with the first groove body (2), the cross section of the second groove body (3) is circular and the cross section area of ​​the second groove body (3) is smaller than that of the first groove body (2), the rear end of the second groove body (3) is backward A third trough body (4) is provided through the third trough body (4), the rear end of the third trough body (4) is connected to the oil pipe (6) at the rear end, and the cross-sectional area of ​​the third trough body (4) is smaller than that of the second trough body (3); a cylindrical stopper (7) is placed at the second trough body (3), and the cross-sectional diameter of the stopper (7) is 1-2 mm smaller than the cross-sectional diameter of the second trough body (3); a groove (8) is provided on the rear end surface of the stopper (7) along its radial direction, and the two ends of the groove (8) extend to the side walls on both sides of the stopper (7) respectively.

2. A buffer valve for use in a pressure relief oil circuit according to claim 1, characterized in that: The cross section of the first tank body (2) is circular.

3. A buffer valve for use in a pressure relief oil circuit according to claim 1, characterized in that: The cross section of the third slot body (4) is circular, and the diameter of the cross section is greater than the slot width of the stopper (7).

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