Alternating one-way valve with long service life

Abstract

The utility model discloses an alternating one-way valve with long service life, which comprises a valve body, a valve cavity is arranged in the valve body, an end sleeve is arranged at the position of the valve cavity, a valve core is arranged in the end sleeve in a sliding mode, a containing groove is arranged at one end of the valve core, a second annular groove is arranged at the other end of the valve core, and a main spring is arranged between the containing groove and the valve body. A containing groove is formed in the end sleeve, an auxiliary spring is installed at the end, away from the containing groove, of the valve element, a first annular groove used for limiting the auxiliary spring is formed in the inner side wall of the end sleeve, and receding grooves are formed in one side of the first annular groove and one side of the second annular groove. The load of a single spring is reduced, so that the risk that the spring is damaged due to overlarge impact force is reduced, the two springs can jointly bear fluid pressure, stress concentration and fatigue damage of each spring are reduced, the service life of each spring is prolonged, and the service life of the alternating one-way valve is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to an alternating check valve with a long service life. Background Technique

[0002] The alternating check valve is one of the hydraulic components widely used in the hydraulic support control system. It is mainly used to control the alternating opening and closing of the liquid path in the hydraulic system to achieve alternating one-way liquid passing. In the hydraulic system of the hydraulic support, when one working chamber of the hydraulic cylinder needs to be supplied with liquid alternately by two liquid inlet pipes and these two liquid inlet pipes cannot be connected, an alternating check valve is required.

[0003] The spring in the existing alternating check valve will be subjected to the pressure of the fluid and the impact force during the reset of the valve core. Therefore, the spring is easily damaged after long-term use, resulting in the inability of the alternating check valve to work properly and shortening its service life. Content of the Utility Model

[0004] The purpose of the utility model is to provide an alternating check valve with a long service life to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an alternating check valve with a long service life, including a valve body. A valve cavity is opened inside the valve body. An end sleeve is installed at the valve cavity. A valve core is slidably installed inside the end sleeve. A receiving groove is opened at one end of the valve core. A second annular groove is provided at the other end of the valve core. A main spring is installed between the receiving groove and the valve body. A secondary spring is installed at the end of the valve core away from the receiving groove. A first annular groove for limiting the secondary spring is provided on the inner side wall of the end sleeve. Avoidance grooves are provided on one side of both the first annular groove and the second annular groove, and both the first annular groove and the second annular groove are communicated with the avoidance groove.

[0006] As a preferred scheme of the utility model, a second valve seat is installed at one end of the end sleeve, and a first valve seat is installed on the inner side wall of the end sleeve.

[0007] As a preferred scheme of the utility model, a first O-ring is provided between the first valve seat and the end sleeve, and a second O-ring is provided between the second valve seat and the end sleeve.

[0008] As a preferred scheme of the utility model, a third O-ring is provided between the end sleeve and the valve body.

[0009] As a preferred scheme of the utility model, a first liquid inlet is opened at the end of the end sleeve away from the second valve seat. A second liquid inlet is provided on one side of the valve body. A liquid outlet is provided at the bottom of the valve body. Both the second liquid inlet and the liquid outlet are communicated with the valve cavity.

[0010] As a preferred embodiment of the present utility model, a plurality of first through holes and second through holes which are annularly and equidistantly distributed are respectively arranged on the outer side of the end sleeve, and both the first through holes and the second through holes are communicated with the liquid outlet.

[0011] As a preferred embodiment of the present utility model, a fixing hole is penetrated through the valve body.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: by arranging two springs, namely the auxiliary spring and the main spring, in the present utility model, the impact force during the reset of the valve core can be jointly borne, the load of a single spring can be reduced, thereby reducing the risk of the spring being damaged due to excessive impact force, and the two springs can jointly bear the fluid pressure, reducing the stress concentration and fatigue damage of each spring, prolonging its service life, and further prolonging the service life of the alternating one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a sectional view of the present utility model;

[0014] Figure 2 is a sectional view of the end sleeve of the present utility model;

[0015] Figure 3 is a sectional view of the valve core of the present utility model;

[0016] Figure 4 is a sectional view of the valve body of the present utility model;

[0017] Figure 5 is a three-dimensional structural schematic diagram of the valve body of the present utility model.

[0018] In the figure: 1, valve body; 2, end sleeve; 3, valve core; 4, second valve seat; 5, first valve seat; 6, auxiliary spring; 7, main spring; 8, first O-ring; 9, first liquid inlet; 10, accommodation groove; 11, third O-ring; 12, second O-ring; 13, second liquid inlet; 14, fixing hole; 15, liquid outlet; 16, first annular groove; 17, first through hole; 18, second through hole; 19, second annular groove; 20, valve cavity; 21, avoidance groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1 to 5, the present utility model provides a technical solution: an alternating check valve with a long service life, including a valve body 1. A valve cavity 20 is provided inside the valve body 1. A end sleeve 2 is installed at the valve cavity 20. A valve core 3 is slidably installed inside the end sleeve 2. A receiving groove 10 is provided at one end of the valve core 3. A second annular groove 19 is provided at the other end of the valve core 3. A main spring 7 is installed between the receiving groove 10 and the valve body 1. A secondary spring 6 is installed at the end of the valve core 3 away from the receiving groove 10. When fluid flows in from the first liquid inlet 9, it will push the valve core 3 to move towards the direction close to the second valve seat 4. The valve core 3 compresses the main spring 7 and stretches the secondary spring 6. When no fluid flows into the first liquid inlet 9, the main spring 7 will bounce back to its original position, and the secondary spring 6 will contract and reset. Both the main spring 7 and the secondary spring 6 will apply a force to the valve core 3 to make it move axially towards the first valve seat 5, so as to reset the valve core 3. The two springs can jointly provide a more stable and uniform reset force for the valve core 3, ensuring that the valve core 3 can accurately return to the predetermined position every time it resets, thereby improving the stability of the alternating check valve. And by setting the secondary spring 6 and the main spring 7, the two springs can jointly bear the impact force when the valve core 3 resets, reduce the load of a single spring, thereby reducing the risk of the spring being damaged due to excessive impact force. And the two springs can jointly bear the fluid pressure, reduce the stress concentration and fatigue damage of each spring, extend its service life, and further extend the service life of the alternating check valve. A first annular groove 16 for limiting the secondary spring 6 is provided on the inner side wall of the end sleeve 2. Both the first annular groove 16 and the second annular groove 19 can play a role in limiting the secondary spring 6 to prevent the secondary spring 6 from shifting during deformation. Avoidance grooves 21 are provided on one side of both the first annular groove 16 and the second annular groove 19, and both the first annular groove 16 and the second annular groove 19 are communicated with the avoidance groove 21. The avoidance groove 21 is used to avoid the secondary spring 6 to ensure that both ends of the secondary spring 6 can be correctly clamped into the first annular groove 16 and the second annular groove 19 respectively.

[0021] Among them, a second valve seat 4 is installed at one end of the end sleeve 2. A first valve seat 5 is installed on the inner side wall of the end sleeve 2. When the valve core 3 contacts the second valve seat 4, the valve core 3 blocks the second through hole 18. At this time, the first liquid inlet 9 is communicated with the liquid outlet 15 through the first through hole 17. The fluid flowing in from the first liquid inlet 9 flows out from the liquid outlet 15 after passing through the first through hole 17. When the valve core 3 contacts the first valve seat 5, the valve core 3 blocks the first through hole 17. The second liquid inlet 13 is communicated with the liquid outlet 15 through the second through hole 18. The fluid flowing in from the second liquid inlet 13 flows out from the liquid outlet 15 after passing through the second through hole 18. Both the second valve seat 4 and the first valve seat 5 can provide a stable support platform for the valve core 3, ensuring that the valve core 3 can maintain the correct position during the closing process and can be closely attached to it when the valve core 3 is closed, so as to achieve effective sealing and avoid fluid leakage.

[0022] Among them, a first O-ring 8 is provided between the first valve seat 5 and the end sleeve 2, and the first O-ring 8 is used to improve the sealing performance between the first valve seat 5 and the end sleeve 2. A second O-ring 12 is provided between the second valve seat 4 and the end sleeve 2, and the second O-ring 12 is used to improve the sealing performance between the second valve seat 4 and the end sleeve 2.

[0023] Among them, a third O-ring 11 is provided between the end sleeve 2 and the valve body 1, and the third O-ring 11 is used to seal between the valve body 1 and the end sleeve 2 to avoid leakage.

[0024] Among them, a first liquid inlet 9 is provided at one end of the end sleeve 2 away from the second valve seat 4. A second liquid inlet 13 is provided on one side of the valve body 1, and a liquid outlet 15 is provided at the bottom of the valve body 1. The second liquid inlet 13 and the liquid outlet 15 are both communicated with the valve cavity 20.

[0025] Among them, a plurality of first through holes 17 and second through holes 18 which are annularly and equidistantly distributed are respectively provided on the outer side of the end sleeve 2, and both the first through holes 17 and the second through holes 18 are communicated with the liquid outlet 15.

[0026] Among them, a fixing hole 14 is provided through the valve body 1, and the fixing hole 14 can facilitate the staff to fix the valve body 1 with screws.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0028] In addition, the terms "first", "second", "third", "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", "fourth" may explicitly or implicitly include at least one of such features.

[0029] In the present utility model, unless otherwise clearly specified or limited, terms such as "installation", "setting", "connection", "fixation", "swivel connection" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An alternating one-way valve with a long service life, comprising a valve body (1), wherein a valve cavity (20) is provided inside the valve body (1), an end sleeve (2) is installed at the valve cavity (20), and a valve core (3) is slidably installed inside the end sleeve (2), characterized in that: A receiving groove (10) is provided at one end of the valve core (3), and a second annular groove (19) is provided at the other end of the valve core (3); a main spring (7) is installed between the receiving groove (10) and the valve body (1); a secondary spring (6) is installed at the end of the valve core (3) away from the receiving groove (10); a first annular groove (16) for limiting the secondary spring (6) is provided on the inner side wall of the end sleeve (2); a avoidance groove (21) is provided on one side of the first annular groove (16) and the second annular groove (19), and the first annular groove (16) and the second annular groove (19) are both connected to the avoidance groove (21).

2. The alternating one-way valve with a long service life according to claim 1, characterized in that: A second valve seat (4) is installed at one end of the end sleeve (2), and a first valve seat (5) is installed on the inner side wall of the end sleeve (2).

3. The alternating one-way valve with a long service life according to claim 2, characterized in that: A first O-ring (8) is provided between the first valve seat (5) and the end sleeve (2), and a second O-ring (12) is provided between the second valve seat (4) and the end sleeve (2).

4. The alternating one-way valve with a long service life according to claim 1, characterized in that: A third O-ring (11) is provided between the end sleeve (2) and the valve body (1).

5. The alternating one-way valve with a long service life according to claim 1, characterized in that: A first liquid inlet (9) is provided at one end of the end sleeve (2) away from the second valve seat (4), a second liquid inlet (13) is provided on one side of the valve body (1), and a liquid outlet (15) is provided at the bottom of the valve body (1), and the second liquid inlet (13) and the liquid outlet (15) are both connected to the valve cavity (20).

6. The alternating non-return valve with a long service life according to claim 5, characterized in that: The outer side of the end sleeve (2) is respectively provided with a plurality of first through holes (17) and second through holes (18) which are distributed in an annular shape and at equal intervals, and the first through holes (17) and the second through holes (18) are both connected to the liquid outlet (15).

7. The alternating one-way valve with a long service life according to claim 1, characterized in that: The valve body (1) is provided with a fixing hole (14) penetrating therethrough.

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