Priority flow valve

Abstract

The utility model relates to the technical field of valves, in particular to a priority flow valve. The priority flow valve comprises a valve element, a throttling piece and a first limiting piece, the valve element is provided with a first mounting groove, the throttling piece is arranged in the first mounting groove, and the first limiting piece is connected with the valve element and abuts against the throttling piece so that the throttling piece can be limited in the first mounting groove. Therefore, the throttling element is prevented from falling off, normal work of the priority flow valve is guaranteed, and normal work of a hydraulic system is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a priority flow valve. Background Technology

[0002] With the continuous development of modern industry, valves are widely used in all major sectors of the national economy and are one of the key pieces of equipment in fixed assets such as equipment, machinery, and pipelines in industries such as energy, petrochemicals, metallurgy, and power. Among them, flow valves are valves that control the flow rate at a throttling orifice by changing the size of the hydraulic resistance at a certain pressure difference, thereby regulating the movement speed of the actuator (hydraulic cylinder or hydraulic motor).

[0003] As a type of flow valve, the priority flow valve works primarily by maintaining a constant flow rate through pressure compensation. Priority flow valves are typically used in fixed displacement hydraulic systems. When the load pressure in the hydraulic system changes, the priority flow valve can maintain a constant flow output, unaffected by load variations.

[0004] The priority flow valve includes a valve body and a valve core that is movably installed in the valve body. In order to reduce the impact of hydraulic oil on the valve core and make the movement of the valve core smoother, the priority flow valve also includes a throttling element. The throttling element is detachably connected to the valve core. During use, the throttling element may fall off, causing the priority flow valve to malfunction, which in turn prevents the actuator from receiving sufficient oil supply and affects the normal operation of the hydraulic system.

[0005] Therefore, there is an urgent need for a priority flow valve to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a priority flow valve to solve the problem of easy detachment of the throttling element in the prior art.

[0007] To achieve the above objectives, the following technical solution is provided:

[0008] A priority flow valve, comprising:

[0009] Valve core, the valve core having a first mounting groove;

[0010] A throttling element, wherein the throttling element is disposed within the first mounting slot;

[0011] A first limiting member is connected to the valve core and abuts against the throttling member to limit the throttling member within the first mounting groove.

[0012] As an optional solution, the valve core is provided with a second mounting groove, and the first limiting member is disposed in the second mounting groove.

[0013] As an optional solution, the first limiting member is interference-fitted with the valve core.

[0014] As an optional feature, the priority flow valve further includes:

[0015] A valve body having a first oil inlet, a second oil inlet, and a first oil outlet;

[0016] The valve core is movably disposed within the valve body, and the valve core and the valve body form a first valve cavity and a second valve cavity. The first oil inlet is connected to the first valve cavity, and the first oil outlet is connected to the first valve cavity. A damping hole is provided on the throttling element, and the valve core has an oil passage. The second oil inlet, the oil passage, the damping hole, and the second valve cavity are connected.

[0017] As an optional solution, the oil passage includes:

[0018] The first channel is arranged radially along the valve core;

[0019] The second channel is connected to the first channel and is arranged along the axial direction of the valve core.

[0020] As an optional solution, the first channel is a stepped hole, with the larger diameter section of the stepped hole facing the second oil inlet.

[0021] As an optional solution, the valve body includes:

[0022] Valve sleeve;

[0023] A valve seat, at least a portion of which is sealed outside the valve sleeve.

[0024] As an optional solution, the valve sleeve is provided with a limiting groove, and the valve core is provided with a second limiting member, which is located in the limiting groove.

[0025] As an optional feature, the priority flow valve further includes a resilient component, the resilient component comprising:

[0026] A spring seat is connected to the valve core;

[0027] A gasket is fitted around the outer periphery of the valve core, with one end of the gasket abutting against the valve sleeve.

[0028] An elastic element is sleeved on the outer periphery of the valve core, with one end of the elastic element abutting against the spring seat and the other end of the elastic element abutting against the other end of the gasket.

[0029] As an optional solution, the valve core is provided with a shoulder, and the end of the gasket away from the elastic element abuts against the shoulder.

[0030] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0031] The priority flow valve provided by this utility model includes a first limiting member, a valve core having a first mounting groove, and a throttling member disposed in the first mounting groove. The first limiting member is connected to the valve core and abuts against the throttling member to limit the throttling member in the first mounting groove. By setting the first limiting member to limit the throttling member in the first mounting groove, the throttling member is prevented from falling off, ensuring the normal operation of the priority flow valve and thus ensuring the normal operation of the hydraulic system. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0033] Figure 1 A cross-sectional view of the priority flow valve provided in an embodiment of this utility model;

[0034] Figure 2 A cross-sectional view of a portion of the structure of the priority flow valve provided in an embodiment of this utility model.

[0035] Figure label:

[0036] 100. Priority flow valve;

[0037] 10. Valve core; 11. First mounting groove; 12. Oil passage; 121. First channel; 122. Second channel; 13. Shoulder; 14. Second mounting groove;

[0038] 20. Throttling element; 21. Damping orifice;

[0039] 30. First limiting component;

[0040] 40. Valve body; 4001. First valve chamber; 4002. Second valve chamber; 41. Valve seat; 42. Valve sleeve; 421. First oil inlet; 422. First oil outlet; 423. Second oil inlet; 424. Second oil outlet; 425. Throttling orifice; 426. Limiting groove;

[0041] 50. Elastic component; 51. Elastic element; 52. Spring seat; 53. Washer;

[0042] 60. Second limiting component. Detailed Implementation

[0043] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0044] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0049] like Figure 1 As shown, this embodiment provides a priority flow valve 100 for use in a fixed displacement hydraulic system. When the load pressure in the system changes, the priority flow valve 100 can maintain a constant flow output and is not affected by the load change.

[0050] Specifically, the priority flow valve 100 includes a valve core 10 and a valve body 40. The valve core 10 is movably disposed within the valve body 40. The valve body 40 is provided with a first oil inlet 421, a first oil outlet 422, a second oil inlet 423, a second oil outlet 424, and a throttling orifice 425. The movement of the valve core 10 within the valve body 40 can open or close the first oil outlet 422 and the second oil outlet 424, and change the oil outlet area of ​​the first oil outlet 422 and the second oil outlet 424, thereby achieving the purpose of constant flow compensation.

[0051] The valve body 40 includes a valve seat 41 and a valve sleeve 42. At least a portion of the valve seat 41 is sealed outside the valve sleeve 42. Dividing the valve body 40 into separate valve seat 41 and valve sleeve 42 simplifies the manufacturing process and avoids excessive axial length of the valve body 40, which could affect manufacturing accuracy. The first oil inlet 421, the first oil outlet 422, the second oil inlet 423, the second oil outlet 424, and the throttling orifice 425 are all located on the valve sleeve 42.

[0052] Optionally, the valve sleeve 42 is threaded to the valve seat 41. The threaded connection has the advantages of simple structure, tight connection and convenient disassembly and assembly.

[0053] The priority flow valve 100 also includes an elastic component 50, which includes a spring seat 52, a gasket 53, and an elastic element 51. The spring seat 52 is connected to the valve core 10, the gasket 53 is sleeved on the outer periphery of the valve core 10, and one end of the gasket 53 abuts against the valve sleeve 42. The elastic element 51 is sleeved on the outer periphery of the valve core 10, one end of the elastic element 51 abuts against the spring seat 52, and the other end of the elastic element 51 abuts against the other end of the gasket 53. In this embodiment, the elastic element 51 is a spring, which is easy to install, has a simple structure, and low operating cost.

[0054] Optionally, the valve core 10 is provided with a shoulder 13, which is formed by extending radially outward from the outer peripheral surface of the valve core 10. The end of the gasket 53 away from the elastic member 51 abuts against the shoulder 13, which facilitates the installation and positioning of the gasket 53. During installation, the gasket 53 is fitted onto the valve core 10 and abuts against the shoulder 13; then the elastic member 51 is fitted onto the valve core 10, and one end of the elastic member 51 abuts against the gasket 53; then the spring seat 52 is fixed onto the valve core 10, and the other end of the elastic member 51 abuts against the spring seat 52. At this time, the elastic member 51 is in a compressed state.

[0055] Optionally, the valve sleeve 42 is provided with a limiting groove 426, which extends along the axial direction of the valve core 10. The valve core 10 is provided with a second limiting member 60, which is located within the limiting groove 426, so that the valve core 10 can move within the range of the limiting groove 426, thereby limiting the axial direction of the valve core 10.

[0056] To reduce the impact of hydraulic oil on the valve core 10 and make the movement of the valve core 10 smoother, the priority flow valve 100 also includes a throttling element 20. The throttling element 20 is detachably connected to the valve core 10. The throttling element 20 is provided with a damping hole 21. The valve core 10 and the valve body 40 form a first valve chamber 4001 and a second valve chamber 4002. The first oil inlet 421 is connected to the first valve chamber 4001, and the first oil outlet 422 is connected to the first valve chamber 4001. The valve core 10 has an oil passage 12. The second oil inlet 423, the oil passage 12, the damping hole 21 and the second valve chamber 4002 are connected.

[0057] In this embodiment, the throttle orifice 425 is located at the end of the valve body 40, and the first oil outlet 422 is connected to an external throttle valve. During operation, oil enters the first valve chamber 4001 through the first oil inlet 421 and then exits through the first oil outlet 422. The hydraulic oil from the first oil outlet 422 passes sequentially through the second oil inlet 423, the oil passage 12, the damping orifice 21 on the throttle element 20, and the second valve chamber 4002. The force acting on the left side of the valve core 10 is called F1; the force acting on the right side of the valve core 10 by the hydraulic oil from the throttle orifice 425 is called F2; and the force acting on the right side of the valve core 10 by the elastic element 51 is called F. 弹 According to the equilibrium analysis of the forces, F1 - F2 = F 弹And at work F 弹 The value is approximately constant to ensure that the flow rate at the first oil outlet 422 remains stable. When the load pressure at the throttle orifice 425 increases, F2+F 弹 When the pressure difference is greater than F1, the flow rate decreases due to the reduced pressure difference through the throttle valve. The valve core 10 moves to the left, increasing the outlet area of ​​the first oil outlet 422. According to the flow rate formula, the reduced pressure difference and increased flow area compensate for the reduced flow rate caused by the reduced pressure difference, thus achieving constant flow compensation. The opposite occurs when the load decreases. When the load decreases to a preset value, the valve core 10 moves to the right, connecting the first oil inlet 421, the first valve chamber 4001, and the second oil outlet 424. At this time, hydraulic oil is discharged from the second oil outlet 424.

[0058] It should be noted that the terms "left" and "right" mentioned in this embodiment do not refer to the spatial meaning of "left" and "right" in the actual application of the priority flow valve 100; they are used only for reference. Figure 1 The view orientation is merely used to distinguish different features and should not be construed as a limitation on the technical solution of this application.

[0059] However, during use, the throttling element 20 may fall off, causing the priority flow valve 100 to malfunction, resulting in insufficient oil supply to the actuator and affecting the normal operation of the hydraulic system.

[0060] To solve the above problems, such as Figure 1 and Figure 2 As shown, the priority flow valve 100 provided in this embodiment also includes a first limiting member 30. The valve core 10 has a first mounting groove 11, and the throttling member 20 is disposed in the first mounting groove 11. The first limiting member 30 is connected to the valve core 10 and abuts against the throttling member 20 to limit the throttling member 20 in the first mounting groove 11. By setting the first limiting member 30 to limit the throttling member 20 in the first mounting groove 11, the throttling member 20 is prevented from falling off, ensuring the normal operation of the priority flow valve 100, thereby ensuring the normal operation of the hydraulic system.

[0061] Specifically, the first limiting component 30 is a steel wire retaining ring, which has advantages such as simple structure and low cost of use.

[0062] Optionally, the first mounting groove 11 is provided with an internal thread, and the throttling element 20 is provided with an external thread. The throttling element 20 is threadedly connected to the valve core 10 to achieve a tight connection and facilitate quick assembly and disassembly of the throttling element 20 and the valve core 10.

[0063] Optionally, the valve core 10 is provided with a second mounting groove 14, and the first limiting member 30 is disposed in the second mounting groove 14 to realize the positioning and installation of the first limiting member 30, and to ensure the stability of its installation and prevent the first limiting member 30 from coming out during use.

[0064] Optionally, the first limiting member 30 is interference-fitted with the valve core 10, which has a simple structure and good connection stability. There is no need to set a connection structure between the first limiting member 30 and the valve core 10, which helps to simplify the structure of the priority flow valve 100.

[0065] Optionally, the oil passage 12 includes a first passage 121 and a second passage 122 that are connected. The first passage 121 is arranged radially along the valve core 10, and the second passage 122 is connected to the first passage 121 and arranged axially along the valve core 10. The end of the first passage 121 opposite to the second passage 122 is connected to the second oil inlet 423, and the end of the second passage 122 opposite to the first passage 121 is connected to the damping hole 21. By setting the oil passage 12 as a first passage 121 and a second passage 122 that are perpendicular to each other, it is easier to process the first passage 121 and the second passage 122, which helps to improve the processing efficiency of the oil passage 12.

[0066] Optionally, there are at least two first channels 121, which are arranged at intervals along the periphery of the valve core 10. Correspondingly, there are at least two second oil inlets 423, which are arranged in a one-to-one correspondence with the first channels 121.

[0067] Optionally, the first channel 121 is a stepped hole, with the large diameter section of the stepped hole facing the second oil inlet 423, which facilitates the machining of the first channel 121 and helps to improve the machining efficiency of the first channel 121.

[0068] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] The above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A priority flow valve, characterized in that, include: Valve core (10), the valve core (10) having a first mounting groove (11); Throttling element (20), the throttling element (20) is disposed in the first mounting groove (11); The first limiting member (30) is connected to the valve core (10) and abuts against the throttling member (20) to limit the throttling member (20) within the first mounting groove (11).

2. The priority flow valve according to claim 1, characterized in that, The valve core (10) is provided with a second mounting groove (14), and the first limiting member (30) is disposed in the second mounting groove (14).

3. The priority flow valve according to claim 1, characterized in that, The first limiting member (30) is interference-fitted with the valve core (10).

4. The priority flow valve according to any one of claims 1-3, characterized in that, The priority flow valve also includes: The valve body (40) has a first oil inlet (421), a second oil inlet (423) and a first oil outlet (422); The valve core (10) is movably disposed within the valve body (40). The valve core (10) and the valve body (40) form a first valve chamber (4001) and a second valve chamber (4002). The first oil inlet (421) communicates with the first valve chamber (4001), and the first oil outlet (422) communicates with the first valve chamber (4001). The throttling element (20) is provided with a damping hole (21). The valve core (10) has an oil passage (12). The second oil inlet (423), the oil passage (12), the damping hole (21), and the second valve chamber (4002) are connected.

5. The priority flow valve according to claim 4, characterized in that, The oil passage (12) includes: The first channel (121) is arranged radially along the valve core (10); The second channel (122) is connected to the first channel (121) and is arranged along the axial direction of the valve core (10).

6. The priority flow valve according to claim 5, characterized in that, The first channel (121) is a stepped hole, and the larger diameter section of the stepped hole is oriented toward the second oil inlet (423).

7. The priority flow valve according to claim 5, characterized in that, The valve body (40) includes: Valve sleeve (42); A valve seat (41), at least a portion of which is sealed outside the valve sleeve (42).

8. The priority flow valve according to claim 7, characterized in that, The valve sleeve (42) is provided with a limiting groove (426), and the valve core (10) is provided with a second limiting member (60), which is located in the limiting groove (426).

9. The priority flow valve according to claim 7, characterized in that, The priority flow valve further includes a resilient component (50), the resilient component (50) comprising: A spring seat (52) is connected to the valve core (10); A gasket (53) is fitted around the outer periphery of the valve core (10), and one end of the gasket (53) abuts against the valve sleeve (42); An elastic element (51) is sleeved on the outer periphery of the valve core (10). One end of the elastic element (51) abuts against the spring seat (52), and the other end of the elastic element (51) abuts against the other end of the gasket (53).

10. The priority flow valve according to claim 9, characterized in that, The valve core (10) is provided with a shoulder (13), and the end of the gasket (53) away from the elastic member (51) abuts against the shoulder (13).

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