Three-purpose valve
By introducing a limit pin and an arc-shaped buffer block structure into the three-way valve, the problem of unstable movement of the spring seat is solved, the buffering performance and service life of the three-way valve are improved, and the sealing performance and control accuracy are ensured.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-03-31
AI Technical Summary
The spring seat of a traditional three-way valve is unstable under the impact of liquid flow or pressure fluctuations, lacks effective buffering and limiting, affects sealing performance and control accuracy, and is prone to exceeding the normal operating range, thus shortening its service life.
A limit pin and arc buffer block structure was designed. The limit pin restricts the movement range of the spring seat, and the arc buffer block reduces the impact between the steel ball and the spring seat, thereby increasing the buffering performance.
This improves the service life and sealing performance of the spring seat, reduces wear, and ensures stable movement and precise control.
Smart Images
Figure CN224064393U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a three-purpose valve. BACKGROUND
[0002] The three-purpose valve is applied to the roof supporting system of the single hydraulic prop in the coal mine underground. It is one of the core control elements of the single hydraulic prop, and the main functions include oil injection, unloading and safety protection. The three-purpose valve is usually composed of a left valve cylinder, a right valve cylinder, an oil injection valve body, a one-way valve assembly and a safety valve assembly. Among them, the one-way valve assembly is used for controlling the flow direction of the hydraulic oil, and the safety valve assembly is used for overload protection, so as to ensure that the single hydraulic prop can be unloaded in time when the roof pressure exceeds the set value, and the safety of the working face is ensured. Although the three-purpose valve plays an important role in the roof supporting system of the single hydraulic prop, there are still some shortcomings in the traditional design: 1. The spring seat of the three-purpose valve has poor movement stability under the action of liquid flow impact or pressure fluctuation, lacks effective buffer device, and is easy to cause unstable contact between the steel ball and the spring seat, thereby affecting the sealing performance and control accuracy; 2. The movement distance of the spring seat is not effectively limited, and the spring seat may exceed the normal working range under the action of liquid flow impact or pressure fluctuation, resulting in excessive movement or damage, shortening the service life of the element, and increasing the maintenance frequency and cost. Therefore, improvement and optimization are needed. CONTENT OF THE UTILITY MODEL
[0003] In order to solve the above problems, the technical problem to be solved by the utility model is to provide a three-purpose valve.
[0004] The utility model discloses a technical scheme that three-purpose valve adopts: including left valve cylinder and right valve cylinder, be equipped with oil injection valve body in the left valve cylinder, be equipped with one-way valve assembly in the oil injection valve body, be equipped with safety valve assembly in the right valve cylinder, through connecting screw connection between one-way valve assembly and safety valve assembly, its characterized in that safety valve assembly includes safety valve sleeve, be equipped with sleeve butt joint cavity and sleeve adjusting cavity in the safety valve sleeve, safety valve assembly still includes the hexagonal guide sleeve that places in sleeve butt joint cavity, the spring seat that places in sleeve adjusting cavity, steel ball, safety valve spring and adjusting screw, the steel ball places between the hexagonal guide sleeve and the spring seat, adjusting screw is connected with sleeve adjusting cavity lateral wall thread, sleeve adjusting cavity lateral wall is equipped with sleeve connecting hole and sleeve liquid hole, the spring seat is equipped with spring seat center column, spring seat inner groove and spring seat peripheral edge from inside to outside, spring seat peripheral edge is equipped with spring seat safety limiting mouth at interval around the arc, through limiting pin connection between sleeve connecting hole and spring seat safety limiting mouth, limiting pin can move in spring seat safety limiting mouth, safety valve spring cover is equipped on spring seat center column, and one end of its is resisted in spring seat and the other end is resisted on adjusting screw.
[0005] The valve sleeve adjusting cavity bottom is provided with arc buffer blocks at intervals along the arc, the outer wall of the arc buffer block is provided with valve sleeve buffer grooves at intervals along the arc, the spring seat inner groove is provided with spring seat buffer ports for the arc buffer blocks to pass through, and the inner wall of the spring seat buffer port is provided with spring seat buffer convex edges opposite to the valve sleeve buffer grooves.
[0006] The safety valve sleeve is provided with a valve sleeve outer allowance groove on the outer wall of the valve sleeve adjusting cavity, and the valve sleeve outer allowance groove is provided with the valve sleeve connecting hole and the valve sleeve liquid passage hole.
[0007] The number of the spring seat safety limiting ports and the spring seat buffer ports is both 2, and the spring seat safety limiting ports and the spring seat buffer ports are staggered.
[0008] The spring seat inner groove is provided with a spring outer stop edge for limiting the outer end of the safety valve spring, and the spring seat buffer port is arranged between the spring outer stop edge and the spring seat peripheral edge.
[0009] The three-way valve has the advantages that the limiting pin moves in the spring seat safety limiting port, effectively limits the moving range of the spring seat, protects the spring seat, and improves the service life of the element; the design of the arc buffer block and the spring seat buffer port significantly improves the buffering performance of the three-way valve, and reduces the wear between the steel ball and the spring seat. BRIEF DESCRIPTION OF DRAWINGS
[0010] The utility model will be further explained in detail in combination with the drawings and specific embodiments.
[0011] Figure 1 It is the half sectional view of the three-way valve of the utility model;
[0012] Figure 2 It is the half sectional view of the safety valve assembly of the utility model;
[0013] Figure 3 It is the half sectional view of the safety valve sleeve of the utility model;
[0014] Figure 4 It is the front structure schematic view of the spring seat of the utility model;
[0015] Figure 5 It is the back structure schematic view of the spring seat of the utility model. DETAILED DESCRIPTION
[0016] As Figures 1-5The utility model relates to a three -purpose valve, including left valve cylinder 1 and right valve cylinder 2, be equipped with oil injection valve body 3 in left valve cylinder 1, be equipped with check valve subassembly 4 in oil injection valve body 3, be equipped with safety valve subassembly 5 in right valve cylinder 2, check valve subassembly 4 and safety valve subassembly 5 are connected through connecting screw 6, safety valve subassembly 5 includes safety valve sleeve 8, be equipped with sleeve butt joint cavity 18 and sleeve adjusting chamber 19 in safety valve sleeve 8, safety valve subassembly 5 still includes the hexagonal guide sleeve 9 of being placed in sleeve butt joint cavity 18, spring seat 10, steel ball 11, safety valve spring 12 and adjusting screw 13 of being placed in sleeve adjusting chamber 19, steel ball 11 is placed between hexagonal guide sleeve 9 and spring seat 10, adjusting screw 13 is connected with sleeve adjusting chamber 19 lateral wall thread, sleeve adjusting chamber 19 lateral wall is equipped with sleeve connecting hole 21 and sleeve liquid run hole 22, spring seat 10 is equipped with spring seat center column 24, spring seat inner groove 25 and spring seat peripheral edge 26 from inside to outside, spring seat peripheral edge 26 is equipped with spring seat safety limiting mouth 27 around the arc interval, sleeve connecting hole 21 and spring seat safety limiting mouth 27 are connected through limiting pin 14, limiting pin 14 can move in spring seat safety limiting mouth 27, safety valve spring 12 is set on spring seat center column 24, and one end is against spring seat 10 and the other end is against adjusting screw 13, limiting pin 14 moves in spring seat safety limiting mouth 27, effectively limits the moving range of spring seat 10, plays the protection effect to spring seat 10, improves the service life of element.
[0017] The bottom of the valve adjusting chamber 19 is provided with an arc buffer block 30 at intervals around the arc, the outer wall of the arc buffer block 30 is provided with a valve buffer groove 31 at intervals around the arc, the spring seat buffer port 28 is provided on the spring seat inner groove 25 for the arc buffer block 30 to pass through, the inner wall of the spring seat buffer port 28 is provided with a spring seat buffer convex edge 29 opposite to the valve buffer groove 31, the spring seat buffer convex edge 29 and the valve buffer groove 31 buffer the spring seat during movement, significantly improving the buffering performance of the three-way valve and reducing the impact and wear between the steel ball and the spring seat.
[0018] The safety valve sleeve 8 is provided with a valve outer allowance groove 32 on the outer wall at the valve adjusting chamber 19, the valve connecting hole 21 and the valve liquid run hole 22 are provided on the valve outer allowance groove 32, facilitating the flow of liquid and the installation and removal of the limiting pin 14.
[0019] The number of the spring seat safety limiting mouth 27 and the spring seat buffer port 28 is two, the spring seat safety limiting mouth 27 and the spring seat buffer port 28 are staggered, making the structure of the spring seat 10 more firm and reliable and moving more smoothly.
[0020] The spring outer stop edge 33 is arranged on the inner groove 25 of the spring seat and is used for limiting the outer end of the safety valve spring 12.
[0021] The above merely describes the 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 three-way valve comprising a left valve cylinder (1) and a right valve cylinder (2), an oil injection valve body (3) is arranged in the left valve cylinder (1), a one-way valve assembly (4) is arranged in the oil injection valve body (3), a safety valve assembly (5) is arranged in the right valve cylinder (2), the one-way valve assembly (4) and the safety valve assembly (5) are connected through a connecting screw rod (6), characterized in that: The safety valve assembly (5) comprises a safety valve sleeve (8) provided with a sleeve butt joint cavity (18) and a sleeve adjusting cavity (19) inside, a hexagonal guide sleeve (9) arranged in the sleeve butt joint cavity (18), a spring seat (10), a steel ball (11), a safety valve spring (12) and an adjusting screw (13) arranged in the sleeve adjusting cavity (19), the steel ball (11) is arranged between the hexagonal guide sleeve (9) and the spring seat (10), the adjusting screw (13) is threadedly connected with the side wall of the sleeve adjusting cavity (19), the side wall of the sleeve adjusting cavity (19) is provided with a sleeve connecting hole (21) and a sleeve liquid outlet hole (22), the spring seat (10) is provided with a spring seat center column (24), a spring seat inner groove (25) and a spring seat peripheral edge (26) from inside to outside, the spring seat peripheral edge (26) is provided with spring seat safety limiting openings (27) at intervals along the arc, the limiting pin (14) is connected between the sleeve connecting hole (21) and the spring seat safety limiting opening (27), the limiting pin (14) can move in the spring seat safety limiting opening (27), the safety valve spring (12) is sleeved on the spring seat center column (24), one end of the safety valve spring (12) abuts against the spring seat (10) and the other end abuts against the adjusting screw (13).
2. The utility valve of claim 1, wherein: The bottom of the sleeve adjusting cavity (19) is provided with arc-shaped buffer blocks (30) at intervals along the arc, the outer wall of the arc-shaped buffer block (30) is provided with sleeve buffer grooves (31) at intervals along the arc, the spring seat inner groove (25) is provided with a spring seat buffer opening (28) for the arc-shaped buffer block (30) to pass through, and the inner wall of the spring seat buffer opening (28) is provided with a spring seat buffer convex edge (29) opposite to the sleeve buffer groove (31).
3. The utility valve of claim 1, wherein: The outer wall of the safety valve sleeve (8) is provided with a sleeve outer allowance groove (32) at the sleeve adjusting cavity (19), and the sleeve connecting hole (21) and the sleeve liquid outlet hole (22) are arranged on the sleeve outer allowance groove (32).
4. The utility valve of claim 2, wherein: The number of the spring seat safety limiting opening (27) and the spring seat buffer opening (28) is both 2, and the spring seat safety limiting opening (27) and the spring seat buffer opening (28) are arranged staggered.
5. The utility valve of claim 2, wherein: The spring seat inner groove (25) is provided with a spring outer stop edge (33) for limiting the outer end of the safety valve spring (12), and the spring seat buffer opening (28) is arranged between the spring outer stop edge (33) and the spring seat peripheral edge (26).