Double-alternating one-way valve
By introducing a buffer assembly, buffer limit seat, and buffer spring into the double alternating check valve, the problem of wear between the steel ball and the valve seat is solved, the service life is extended, and the sealing performance is improved.
Patent Information
- Application Number
- CN202520237053.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-02-14
AI Technical Summary
In hydraulic systems, traditional double-alternating check valves lack a buffer device, making the contact surface between the steel ball and the valve seat prone to wear, resulting in decreased sealing performance and shortened service life.
A buffer assembly, including a buffer limit seat and a buffer spring, is introduced into the double alternating check valve. The buffer spring evenly absorbs the impact force of the liquid flow, reducing the direct impact between the steel ball and the valve seat. The buffer limit seat and sealing ring are designed to improve the sealing performance.
This effectively reduces wear between the steel ball and the valve seat, extends service life, and improves product durability and reliability.
Smart Images
Figure CN223923427U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of double alternative check valves. BACKGROUND
[0002] Double alternative check valve is one of the more widely used hydraulic components in hydraulic support control system, in the hydraulic system of hydraulic support, double alternative check valve is mainly used for the control of hydraulic system jack and realizes the differential action of jack.In traditional double alternative check valve, steel ball is the key sealing element, for controlling the flow direction of hydraulic oil.When liquid flow changes suddenly or pressure fluctuation is larger, steel ball will be subjected to strong impact force, due to lack of effective buffer device, the impact force between steel ball and valve seat contact surface can cause the wear of steel ball surface and valve seat inner cone surface to intensify, leading to sealing performance decline, and further causing hydraulic system leakage problem, and accelerate the fatigue and damage of component, finally make the service life of double alternative check valve significantly shorten, and it is improved and optimized for this. SUMMARY
[0003] To solve the above problems, the technical problem to be solved by the utility model is to provide a double alternative check valve.
[0004] The utility model discloses double alternative check valve adopts the technical scheme: including check valve body, the first valve core subassembly of longitudinal setting in the check valve body and the second valve core subassembly of horizontal setting in the check valve body, its characterized in that the first valve core subassembly and the second valve core subassembly all include the buffer assembly, valve seat subassembly and check valve joint that set from inside to outside, the valve seat subassembly includes check valve seat, the steel ball guide sleeve of being arranged in the check valve seat and the steel ball that can be unidirectionally mobile setting, the check valve seat is equipped with valve seat main push hole and valve seat butt joint hole for the steel ball guide sleeve installation and with the valve seat main push hole vertical intercommunication, the valve seat main push hole inner wall is equipped with the valve seat inner taper face that forms the hard seal with the steel ball;
[0005] The buffer assembly includes buffer limiting seat and buffer spring, the buffer spring includes spring large diameter portion and spring small diameter portion, the diameter of the spring large diameter portion is greater than the diameter of the spring small diameter portion, the buffer limiting seat is equipped with limiting seat positioning groove for the spring large diameter portion limiting and limiting seat through hole communicated with the limiting seat positioning groove, the spring small diameter portion passes through the limiting seat through hole and is placed in the valve seat main push hole, one end of the buffer spring is against the inner wall of the check valve body, and the other end corresponds to the steel ball.
[0006] The diameter of the limiting seat through hole is greater than or equal to the diameter of the valve seat main push hole.
[0007] The valve seat main push hole is equipped with valve seat inner support stop edge for the spring small diameter portion support on the inner wall of one end close to the buffer limiting seat.
[0008] The buffer assembly further comprises a sealing ring, and the buffer limiting seat is provided with a sealing ring positioning groove for positioning the sealing ring.
[0009] The limiting seat positioning groove and the limiting seat through hole are connected with a transition taper surface.
[0010] The double-alternate one-way valve has the advantages that: the buffer assembly is introduced, liquid flow impact force can be effectively absorbed, direct impact between the steel ball and the valve seat is reduced, the service life of the steel ball and the valve seat is prolonged, and the durability and reliability of the product are significantly improved. BRIEF DESCRIPTION OF DRAWINGS
[0011] The utility model will be further explained in detail in combination with the drawings and specific embodiments.
[0012] Figure 1 is the half sectional view of the double-alternate one-way valve of the utility model;
[0013] Figure 2 is the half sectional view of the first valve core assembly of the utility model;
[0014] Figure 3 is the half sectional view of the one-way valve seat of the utility model;
[0015] Figure 4 is the half sectional view of the buffer spring of the utility model;
[0016] Figure 5 is the half sectional view of the buffer limiting seat of the utility model. SPECIFIC EMBODIMENTS
[0017] As Figures 1-5The utility model relates to a double-alternate check valve, including check valve valve body 1, the first valve core subassembly 2 of longitudinal setting in check valve valve body 1 and the second valve core subassembly 3 of horizontal setting in check valve valve body 1, the first valve core subassembly 2 and the second valve core subassembly 3 all include the buffer assembly 4, valve seat assembly 5 and check valve joint 6 of setting from inside to outside, valve seat assembly 5 includes check valve seat 7, the steel ball guide sleeve 8 of being arranged in check valve seat 7 and the steel ball 9 of being arranged in the one-way movable, check valve seat 7 is equipped with valve seat main push hole 10 and valve seat butt joint hole 11 with valve seat main push hole 10 vertical intercommunication and be used for steel ball guide sleeve 8 installation, the inner wall of valve seat main push hole 10 is equipped with valve seat inner taper surface 12 with steel ball 9 forms hard seal, buffer assembly 4 includes buffer limit seat 14 and buffer spring 15, buffer spring 15 includes spring large diameter part 17 and spring small diameter part 18, the diameter of spring large diameter part 17 is greater than the diameter of spring small diameter part 18, the buffer limit seat 14 is equipped with limit seat positioning groove 19 for the limit of spring large diameter part 17 and limit seat through -hole 20 with limit seat positioning groove 19 intercommunication, spring small diameter part 18 passes through limit seat through -hole 20 and is placed in valve seat main push hole 10, one end of buffer spring 15 is against the inner wall of check valve valve body 1, and its other end corresponds with steel ball 9, introduces buffer assembly 4, spring large diameter part 17 is used for limit and support, and spring small diameter part 18 makes buffer spring be able to absorb liquid flow impact force evenly, reduces the impact force of steel ball and valve seat contact surface, reduces the direct impact between steel ball and valve seat, prolongs the service life of steel ball and valve seat, significantly improves the durability and reliability of product.
[0018] The diameter of the limit seat through-hole 20 is greater than or equal to the diameter of the valve seat main push hole 10, further reducing the possibility of motion interference, making the buffer spring 15 easy to install and remove.
[0019] The valve seat main push hole 10 is provided with a valve seat inner support stop edge 13 on the inner wall of one end close to the buffer limit seat 14 for supporting the spring small diameter part 18, providing support for the spring small diameter part 18, on the one hand reducing the risk of fracture at the connection between the spring small diameter part 18 and the spring large diameter part 17, and on the other hand further enhancing the firmness and stability of the buffer spring installation.
[0020] The buffer assembly 4 further includes a sealing ring 16, and the buffer limit seat 14 is provided with a sealing ring positioning groove 22 for positioning the sealing ring 16, further improving the overall sealing performance of the product after installation.
[0021] A transition taper 23 is provided at the connection between the limit seat positioning groove 19 and the limit seat through-hole 20, making the transition smoother.
[0022] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A dual alternating check valve comprising a check valve body (1), a first spool assembly (2) disposed longitudinally within the check valve body (1), and a second spool assembly (3) disposed transversely within the check valve body (1), characterized in that: The first valve core assembly (2) and the second valve core assembly (3) each comprise a buffer assembly (4), a valve seat assembly (5) and a one-way valve joint (6) arranged from inside to outside, the valve seat assembly (5) comprises a one-way valve seat (7), a steel ball guide sleeve (8) arranged in the one-way valve seat (7) and a one-way movable steel ball (9), the one-way valve seat (7) is provided with a valve seat main push hole (10) and a valve seat butt joint hole (11) in vertical communication with the valve seat main push hole (10) and used for installing the steel ball guide sleeve (8), the inner wall of the valve seat main push hole (10) is provided with a valve seat inner conical surface (12) forming a hard seal with the steel ball (9); The buffer assembly (4) comprises a buffer limiting seat (14) and a buffer spring (15), the buffer spring (15) comprises a spring large diameter part (17) and a spring small diameter part (18), the diameter of the spring large diameter part (17) is larger than that of the spring small diameter part (18), the buffer limiting seat (14) is provided with a limiting seat positioning groove (19) for limiting the spring large diameter part (17) and a limiting seat through hole (20) in communication with the limiting seat positioning groove (19), the spring small diameter part (18) is arranged in the valve seat main push hole (10) after passing through the limiting seat through hole (20), one end of the buffer spring (15) abuts against the inner wall of the one-way valve body (1), and the other end thereof corresponds to the steel ball (9).
2. The dual alternating check valve of claim 1, wherein: The diameter of the limiting seat through hole (20) is greater than or equal to the diameter of the valve seat main push hole (10).
3. The dual alternating check valve of claim 1, wherein: The valve seat main push hole (10) is provided with a valve seat inner support stop edge (13) for supporting the spring small diameter part (18) on the inner wall of one end close to the buffer limiting seat (14).
4. The dual alternating check valve of claim 1, wherein: The buffer assembly (4) further comprises a sealing ring (16), and the buffer limiting seat (14) is provided with a sealing ring positioning groove (22) for positioning the sealing ring (16).
5. The dual alternating check valve of claim 1, wherein: The connecting part of the limiting seat positioning groove (19) and the limiting seat through hole (20) is provided with a transition conical surface (23).