Shuttle valve, multi-way valve and hydraulic system

Abstract

The utility model relates to the technical field of shuttle valves, and provides a shuttle valve, a multi-way valve and a hydraulic system, the shuttle valve comprises a first valve seat and a second valve seat, the peripheries of the first valve seat and the second valve seat are respectively provided with a first groove and a second groove; a first oil inlet channel is formed in the first valve seat, and a second oil inlet channel and an oil outlet channel are formed in the second valve seat; the first sealing element and the second sealing element are respectively arranged in the first groove and the second groove; and the steel ball is arranged between the first oil inlet channel and the second oil inlet channel, and under the action of the steel ball, only one of the first oil inlet channel and the second oil inlet channel is communicated with the oil outlet channel. The whole shuttle valve is detachable, leakage detection of the shuttle valve is realized independently, and the test cost is reduced; when the shuttle valve breaks down, the shuttle valve can be directly replaced, and the multi-way valve is prevented from being replaced; in addition, the steel ball, the first valve seat and the second valve seat are in linear sealing, the anti-pollution capacity is high, sealing is reliable, and the response speed is high.

Description

Technical Field

[0001] The utility model relates to the technical field of shuttle valves, in particular to a shuttle valve, a multi-way valve and a hydraulic system. Background Art

[0002] At present, construction machinery generally transmits power through hydraulic systems, and multi-way valves play the role of controlling hydraulic pressure, flow and reversing in hydraulic systems. When the multi-way valve reversing link is working, the inter-plate shuttle valve is often used to select the high-pressure oil of the two adjacent valve bodies to be led out and fed back to the control element. For the closed system, the pressure of the working oil port enters the load-sensitive oil chamber through the oil hole on the corresponding valve core, and then is selected and led out by the shuttle valve and transmitted to the oil inlet link, and then fed back to the load-sensitive pump to realize the load-sensitive function of the system. For the open system, the working oil pressure led out by the shuttle valve is directly transmitted to the pressure compensation valve of the oil inlet link to realize the load-sensitive function of the system.

[0003] In the prior art, the common structure of the inter-plate shuttle valve is to process a valve seal as the first valve seat on the first valve body, configure a valve sleeve, and the steel ball can roll axially in the valve sleeve, and then install a second valve seat on the outside, and install a sealing ring on the second valve seat. The other adjacent valve body presses the second valve seat to fix it. When working, the steel ball is pushed to the valve seat on the side with lower pressure, and finally its oil port is blocked to achieve the purpose of selecting high-pressure oil.

[0004] However, the valve body is used as the sealing seat. Since the valve body is usually made of cast iron with a hardness of 190HBW-240HBW, it is easy to cause the sealing surface to be concave and deformed until cracks occur and fail due to long-term impact by the steel ball, which usually has the defect of a short service life. Because the valve seat is processed on the valve body, it is difficult to detect the leakage of the shuttle valve alone, and the multi-way valve can only be verified as a whole. The detection process is complicated and it is difficult to determine whether the shuttle valve is qualified. Summary of the invention

[0005] The utility model provides a shuttle valve, a multi-way valve and a hydraulic system, which are used to solve the defect in the prior art that it is difficult to detect the use of a single shuttle valve, realize the shuttle valve as a whole and detachable, realize the leakage detection of the shuttle valve separately, reduce the test cost and improve the quality.

[0006] The utility model provides a shuttle valve, comprising:

[0007] a first valve seat and a second valve seat, wherein the first valve seat and the second valve seat are respectively provided with a first groove and a second groove on their outer circumferences; the first valve seat is provided with a first oil inlet passage, and the second valve seat is provided with a second oil inlet passage and an oil outlet passage; a first sealing member and a second sealing member are respectively provided in the first groove and the second groove;

[0008] A steel ball is disposed between the first oil inlet passage and the second oil inlet passage, and under the action of the steel ball, only one of the first oil inlet passage and the second oil inlet passage is connected to the oil outlet passage.

[0009] According to a shuttle valve provided by the utility model, the hardness of the first valve seat and the second valve seat are both lower than the hardness of the steel ball.

[0010] According to a shuttle valve provided by the utility model, the hardness of the first valve seat and the second valve seat is 330HBW-390HBW, and the hardness of the steel ball is 58HRC-62HRC.

[0011] According to a shuttle valve provided by the utility model, the first valve seat and the second valve seat are riveted, interference-fitted or threadedly connected.

[0012] According to a shuttle valve provided by the utility model, the first sealing member and the second sealing member are both O-type sealing rings.

[0013] According to a shuttle valve provided by the utility model, the first valve seat and the second valve seat include medium carbon alloy steel valve seats.

[0014] The utility model also provides a multi-way valve, comprising:

[0015] The first valve body is provided with a first oil inlet passage and an oil outlet passage; and the first valve body is provided with a shuttle valve mounting hole;

[0016] The second valve body is provided with a second oil inlet passage;

[0017] The shuttle valve as described above is arranged in the shuttle valve mounting hole.

[0018] According to a multi-way valve provided by the utility model, an axial sealing groove is provided on the end surface of the second valve body facing the first valve body, and the axial sealing groove is used for installing a third sealing component.

[0019] According to a multi-way valve provided by the utility model, the shuttle valve and the shuttle valve installation hole are clearance-matched.

[0020] The utility model also provides a hydraulic system, comprising the shuttle valve as described above, or the multi-way valve as described above.

[0021] The shuttle valve, multi-way valve and hydraulic system provided by the utility model are characterized in that a first groove and a second groove are respectively arranged on the outer periphery of a first valve seat and a second valve seat, a first oil inlet passage is opened on the first valve seat, a second oil inlet passage and an oil outlet passage are opened on the second valve seat, a first sealing member and a second sealing member are respectively arranged in the first groove and the second groove, a steel ball is arranged between the first oil inlet passage and the second oil inlet passage, and under the action of the steel ball, only one of the first oil inlet passage and the second oil inlet passage is connected with the oil outlet passage, so that the overall shuttle valve is detachable, leakage detection of the shuttle valve is realized separately, and the testing cost is reduced; and when the shuttle valve fails, the shuttle valve can be directly replaced, and replacement of the multi-way valve is avoided; in addition, a line seal is formed between the steel ball and the first valve seat and the second valve seat, so that the anti-pollution ability is strong, the sealing is reliable, and the response speed is fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is one of the structural schematic diagrams of a shuttle valve of an embodiment provided by the utility model.

[0024] Figure 2 This is the second structural schematic diagram of a shuttle valve according to an embodiment of the present invention.

[0025] Figure 3 This is the third structural schematic diagram of a shuttle valve according to an embodiment of the present invention.

[0026] Figure 4 The utility model is a schematic diagram of the principle of a shuttle valve according to an embodiment of the present invention.

[0027] Figure 5 The utility model is provided in an embodiment of the shuttle valve installation structure schematic diagram.

[0028] Reference numerals:

[0029] 1. First valve seat; 2. Second valve seat; 100. First oil inlet passage; 200. Second oil inlet passage; 300. Oil outlet passage; 3. First sealing member; 4. Second sealing member; 5. Steel ball; 10. First valve body; 20. Second valve body; 30. Third sealing member. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of 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 limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0032] Combine the following Figure 1-Figure 5 The shuttle valve of the utility model is described.

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the utility model provides a shuttle valve, including a first valve seat 1, a second valve seat 2, a first sealing member 3, a second sealing member 4 and a steel ball 5.

[0034] The first valve seat 1 and the second valve seat 2 are provided with a first groove and a second groove on their outer peripheries, respectively, and the first groove and the second groove are used to place seals. The first valve seat 1 is provided with a first oil inlet passage 100, and the second valve seat 2 is provided with a second oil inlet passage 200 and an oil outlet passage 300. The first seal 3 and the second seal 4 are provided in the first groove and the second groove, respectively, for sealing and preventing oil leakage. The steel ball 5 is provided between the first oil inlet passage 100 and the second oil inlet passage 200, and plays a role in controlling the connection of the oil passages. Under the action of the steel ball 5, only one of the first oil inlet passage 100 and the second oil inlet passage 200 is connected to the oil outlet passage 300.

[0035] The shuttle valve provided by the utility model can not only realize leakage detection of the shuttle valve separately and reduce the testing cost, but also when the shuttle valve fails, the shuttle valve can be directly replaced to avoid replacing the multi-way valve; moreover, there is a line seal between the steel ball 5 and the first valve seat 1 and the second valve seat 2, which has strong anti-pollution ability, reliable sealing and fast response speed; at the same time, it has a simple structure, is easy to process and has low cost.

[0036] In a feasible embodiment of the present invention, the hardness of the first valve seat 1 and the second valve seat 2 are both lower than the hardness of the steel ball 5, which ensures that a sealing line is formed between the first valve seat 1, the second valve seat 2 and the steel ball 5, while increasing the service life of the first valve seat 1 and the second valve seat 2. The steel ball 5 plays a key role in controlling the connection of the oil channel in the shuttle valve, and needs to withstand higher pressure and friction, so it needs a higher hardness. The first valve seat 1 and the second valve seat 2 are mainly responsible for providing a sealing surface and supporting the steel ball. The hardness requirements are relatively low, but they still need to ensure good cooperation with the seal and the steel ball. This design ensures the stability and reliability of the shuttle valve.

[0037] In a feasible embodiment of the utility model, the hardness of the first valve seat 1 and the second valve seat 2 is 330HBW-390HBW, the hardness of the first valve seat 1 and the second valve seat 2 is enhanced, the hardness of the first valve seat 1 and the second valve seat 2 is greatly increased relative to when the valve body is used as the valve seat, and at the same time is lower than the hardness of the steel ball 5, the hardness of the steel ball 5 is 58HRC-62HRC, ensuring that a sealing line can be formed while increasing the service life of the first valve seat 1 and the second valve seat 2.

[0038] In a feasible embodiment of the present invention, as Figure 1 As shown, the first valve seat 1 and the second valve seat 2 can be connected by riveting. Figure 2 As shown, it can also be connected by threaded connection, such as Figure 3 As shown, it can also be connected by interference fit. In practical applications, the choice of connection method should be determined based on specific working conditions, material properties and processing requirements. At the same time, the reliability and maintainability of the connection also need to be considered.

[0039] In a feasible embodiment of the utility model, the first seal 3 and the second seal 4 are both O-rings. Specifically, the O-ring can be a rubber seal, or a silicone seal, or a hydrogenated nitrile rubber seal, or a silicone rubber seal, or a fluororubber seal. Ensure good sealing and strength. As long as it can prevent the lubricating oil from leaking out and foreign objects from intruding. The two oil inlet passages of the shuttle valve are sealed with O-rings, which are reliable and easy to replace.

[0040] In a feasible embodiment of the present invention, the first valve seat 1 and the second valve seat 2 include medium carbon alloy steel valve seats, and the medium carbon alloy steel is subjected to tempering treatment to improve the deformation resistance of the first valve seat 1 or the second valve seat 2, and can improve the service life of the first valve seat 1 or the second valve seat 2.

[0041] The steel ball 5 comprises a bearing steel ball, so that when the steel ball 5 hits the first valve seat 1 or the second valve seat 2, slight deformation can be generated to ensure good sealing.

[0042] like Figure 4 As shown, the working principle of the shuttle valve provided by the embodiment of the first aspect of the utility model is that when the pressure of the first oil inlet channel 100 is greater than the pressure of the second oil inlet channel 200, the steel ball 5 is pushed toward the second valve seat 2 by the oil, and the second oil inlet channel 200 is blocked, and the oil flows from the first oil inlet channel 100 to the oil outlet channel 300; conversely, when the pressure of the first oil inlet channel 100 is less than the pressure of the second oil inlet channel 200, the steel ball 5 is pushed toward the first valve seat 1 by the oil, and the first oil inlet channel 100 is blocked, and the oil flows from the second oil inlet channel 200 to the oil outlet channel 300.

[0043] like Figure 5 As shown, a second embodiment of the utility model provides a multi-way valve, comprising a first valve body 10, a second valve body 20 and a shuttle valve as in any one of the above embodiments.

[0044] The first valve body 10 is provided with a first oil inlet passage 100, which is used to introduce hydraulic oil or other working fluid into the multi-way valve. The first valve body 10 is provided with a shuttle valve mounting hole, which is used to install and fix the shuttle valve to ensure that the shuttle valve can be correctly connected to the first valve body 10.

[0045] The second valve body 20 is provided with a second oil inlet passage 200 and an oil outlet passage 300; the shuttle valve is arranged in the shuttle valve mounting hole. The second oil inlet passage 200 may be used as a backup oil inlet passage. The second valve body 20 is also provided with an oil outlet passage 300, which are used to output the hydraulic oil or working fluid processed by the multi-way valve to the next working link or equipment.

[0046] The multi-way valve provided in the second aspect of the utility model can realize more complex fluid control functions and meet different working requirements by combining the shuttle valve with the first valve body 10 and the second valve body 20. The flexibility and configurability of the shuttle valve make this multi-way valve highly adaptable and scalable, and can adapt to different working environments and application scenarios.

[0047] In a feasible embodiment of the present invention, an axial sealing groove is provided on the end surface of the second valve body 20 facing the first valve body 10, and the axial sealing groove is used to install the third sealing member 30. The third sealing member 30 is installed in the axial sealing groove of the second valve body 20. This position is selected to ensure that when the first valve body 10 and the second valve body 20 are combined, the sealing member can effectively seal the gap between the first valve body 10 and the second valve body 20 to prevent fluid leakage. Through correct installation and selection of appropriate sealing material, the sealing performance of the multi-way valve during operation can be ensured, fluid leakage can be prevented, and the normal operation of the system can be guaranteed.

[0048] In a feasible embodiment of the utility model, the shuttle valve and the shuttle valve installation hole are matched with each other to facilitate the installation of the shuttle valve. In addition, a threaded hole can be processed on the first valve seat 1, and the thread length needs to be short to avoid damaging the sealing line of the first valve seat 1, which is only used to install the screws to disassemble the shuttle valve.

[0049] A third aspect of the present invention provides a hydraulic system, comprising the shuttle valve described in any one of the above embodiments, or the multi-way valve described in any one of the above embodiments.

[0050] The hydraulic system provided by the third embodiment of the utility model includes the shuttle valve or multi-way valve as described above, and the shuttle valve is designed as an integrated whole, and the structure is simple, and the performance of the shuttle valve can be tested separately, which reduces costs and improves quality. The hardness of the first valve seat 1 and the second valve seat 2 is increased relative to the valve body hardness in the prior art, but the hardness is lower than that of the steel ball 5, which ensures reliable sealing while increasing the service life of the first valve seat 1 and the second valve seat 2. The shuttle valve is easy to disassemble, and the screws are screwed into the tail thread of the shuttle valve, and the shuttle valve can be pulled out. It is easy to repair and replace, and there is no need to replace the valve body due to shuttle valve quality problems, which reduces maintenance costs.

[0051] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0052] In the description of this specification, the description of reference terms such as "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or modes. In addition, in the absence of mutual contradiction, those skilled in the art can combine and combine the different embodiments or modes described in this specification and the features of different embodiments or modes. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, not to limit them; although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A shuttle valve, characterized in that: include: A first valve seat (1) and a second valve seat (2), wherein the first valve seat (1) and the second valve seat (2) are respectively provided with a first groove and a second groove on their outer circumferences; a first oil inlet passage (100) is provided on the first valve seat (1), and a second oil inlet passage (200) and an oil outlet passage (300) are provided on the second valve seat (2); A first sealing member (3) and a second sealing member (4), respectively disposed in the first groove and the second groove; A steel ball (5) is arranged between the first oil inlet passage (100) and the second oil inlet passage (200), and under the action of the steel ball (5), only one of the first oil inlet passage (100) and the second oil inlet passage (200) is connected to the oil outlet passage (300).

2. The shuttle valve according to claim 1, characterized in that: The hardness of the first valve seat (1) and the second valve seat (2) are both lower than the hardness of the steel ball (5).

3. The shuttle valve according to claim 1, characterized in that: The hardness of the first valve seat (1) and the second valve seat (2) is 330 HBW-390 HBW, and the hardness of the steel ball (5) is 58 HRC-62 HRC.

4. The shuttle valve according to claim 1, characterized in that: The first valve seat (1) and the second valve seat (2) are connected by riveting, interference fitting or threading.

5. The shuttle valve according to claim 1, characterized in that: The first sealing member (3) and the second sealing member (4) are both O-rings.

6. The shuttle valve according to claim 1, characterized in that: The first valve seat (1) and the second valve seat (2) comprise medium carbon alloy steel valve seats.

7. A multi-way valve, characterized in that: include: The first valve body (10) is provided with a first oil inlet passage (100); and the first valve body (10) is provided with a shuttle valve mounting hole; The second valve body (20) is provided with a second oil inlet passage (200) and an oil outlet passage (300); The shuttle valve according to any one of claims 1 to 6 is arranged in the shuttle valve mounting hole.

8. The multi-way valve according to claim 7, characterized in that: An axial sealing groove is provided on the end surface of the second valve body (20) facing the first valve body (10), and the axial sealing groove is used for installing a third sealing member (30).

9. The multi-way valve according to claim 7, characterized in that: The shuttle valve is clearance-matched with the shuttle valve mounting hole.

10. A hydraulic system, characterized in that: It comprises the shuttle valve according to any one of claims 1 to 6, or the multi-way valve according to any one of claims 7 to 9.

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