Buffer throttling transition joint

Abstract

The utility model discloses a buffer throttling transition joint which comprises a valve seat, an oil passing cavity is formed in the valve seat, and a valve element slides in the oil passing cavity. An oil cavity B is formed in one end of the valve seat, a connecting hole is formed in the end, away from the oil cavity B, of the valve seat, a connector is arranged and connected with the valve seat through the connecting hole, an oil cavity A is formed in the connector, and the oil passing cavity, the oil cavity B and the oil cavity A are communicated; a valve element internal channel is formed in the valve element and communicates with the oil passing cavity, the two ends of the valve element internal channel are located on the end face, close to the connector, of the valve element and the outer side wall, close to one side of the oil passing cavity B, of the valve element correspondingly, the oil liquid cavity B communicates with the oil passing cavity through a small communicating cavity, and the outer wall of the valve element can block the small communicating cavity. A damping hole is formed in the end, close to the oil passing cavity B, of the valve element and communicates with an inner channel of the valve element. The problems of pressure impact and too high speed in a hydraulic system are effectively solved, and the stability and reliability of the system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic joints, in particular to a buffer throttling transition joint. Background Art

[0002] In hydraulic systems, buffer throttling transition joints are an important component, especially in ultra-high pressure working pressure systems of 40-60MPa. Hydraulic systems are often used to control engineering machinery, metallurgical equipment, and mechanical processing to achieve motion control and load support for large mechanical devices.

[0003] However, the traditional hydraulic system lacks an effective buffer throttling transition control device. During the motion control process of the hydraulic system, when the hydraulic cylinder piston rod is retracted, the speed may be too fast due to large chamber pressure relief or excessive weight of the ejected object, resulting in pressure shock and damage to the hydraulic cylinder and other components. Pressure shock and excessive speed may occur, especially when the hydraulic cylinder piston rod is retracted. These phenomena may cause damage to the hydraulic system, hydraulic cylinder and other components, and even threaten personnel safety. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes a buffer throttling transition joint, comprising a valve seat, an oil passage chamber is provided inside the valve seat, and a valve core slides in the oil passage chamber; an oil chamber B is provided at one end of the valve seat, a connecting hole is provided at the end of the valve seat away from the oil chamber B, a joint is provided to be connected with the valve seat through the connecting hole, an oil chamber A is provided inside the joint, and the oil passage chamber, the oil chamber B and the oil chamber A are connected; a valve core internal channel is provided on the valve core, the valve core internal channel is connected with the oil passage chamber, and the two ends of the valve core internal channel are respectively located at the end face of the valve core close to the joint and the outer side wall of the valve core close to the oil passage chamber B, the oil chamber B and the oil passage chamber are connected through a small connecting chamber, the inner diameter of the small connecting chamber is smaller than the inner diameter of the oil passage chamber and the oil chamber B, and the outer wall of the valve core can block the small connecting chamber, and a damping hole is provided at the end of the valve core close to the oil passage chamber B, and the damping hole is connected with the internal channel of the valve core.

[0005] Furthermore, a spring is fixed to one end of the valve core close to the joint, and the other end of the spring is fixed to the joint.

[0006] Furthermore, the end of the valve core close to the small connecting cavity is in a conical column shape, the outer diameter of the end with a smaller outer diameter of the conical column is smaller than the inner diameter of the small connecting cavity, and the outer diameter of the end with a larger outer diameter of the conical column is larger than the inner diameter of the small connecting cavity.

[0007] Furthermore, the outer diameter of the end of the valve core close to the joint is the same as the inner diameter of the oil passage chamber B, and the outer diameter of the end of the valve core close to the oil passage chamber B is smaller than the inner diameter of the oil passage chamber B.

[0008] Furthermore, a diamond ring is installed between the valve seat and the joint.

[0009] The beneficial effects of the utility model are as follows:

[0010] 1. The buffer throttling transition joint of the present invention effectively solves the problems of pressure shock and excessive speed in the hydraulic system, improves the stability and reliability of the system, and prolongs the service life of the hydraulic system and related components.

[0011] 2. By reducing the damage to the hydraulic system and related components, the maintenance and replacement costs can be reduced, the operating costs of the system are reduced, and the sustainability and economic benefits of the equipment are improved.

[0012] 3. It slows down the retraction speed of the piston rod, reduces pressure shock, effectively protects the hydraulic system and related components, improves the safety of the working environment, and reduces the risk of personal injury. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the internal structure of the utility model.

[0014] The description of the accompanying drawings is as follows: 1. Connector; 2. Diamond ring; 3. Spring; 4. Valve core; 5. Valve seat; 6. Oil chamber; 7. Oil chamber B; 8. Oil chamber A; 9. Internal channel of valve core; 10. Small connecting chamber; 11. Damping hole. DETAILED DESCRIPTION

[0015] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0016] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] The utility model is further described below in conjunction with the accompanying drawings:

[0018] A buffer throttling transition joint, such as Figure 1 As shown, it includes a valve seat 5, an oil chamber 6 is provided inside the valve seat 5, and a valve core 4 slides in the oil chamber 6; an oil chamber B7 is provided at one end of the valve seat 5, and a connecting hole is provided at the end of the valve seat 5 away from the oil chamber B7, and a joint 1 is provided to connect with the valve seat 5 through the connecting hole, an oil chamber A8 is provided inside the joint 1, and the oil chamber 6, the oil chamber B7 and the oil chamber A8 are connected, and a diamond ring 2 is installed between the valve seat 5 and the joint 1; a spring 3 is fixed to the end of the valve core 4 close to the joint 1, and the other end of the spring 3 is fixed to the joint 1; the valve core 4 An internal valve core channel 9 is provided on the valve core, which is connected to the oil passage chamber 6, and the two ends of the internal valve core channel 9 are respectively located on the end face of the valve core 4 close to the joint 1 and the outer wall of the valve core 4 close to the oil passage chamber 6B. The oil chamber B7 and the oil passage chamber 6 are connected through a small connecting chamber 10. The inner diameter of the small connecting chamber 10 is smaller than the inner diameters of the oil passage chamber 6 and the oil chamber B7, and the outer wall of the valve core 4 can block the small connecting chamber 10. A damping hole 11 is provided on the end of the valve core 4 close to the oil passage chamber 6B, and the damping hole 11 is connected to the internal valve core channel 9.

[0019] like Figure 1 As shown, in this embodiment, the end of the valve core 4 close to the small connecting chamber 10 is in a conical column shape, the outer diameter of the end of the conical column with a smaller outer diameter is smaller than the inner diameter of the small connecting chamber 10, and the outer diameter of the end of the conical column with a larger outer diameter is larger than the inner diameter of the small connecting chamber 10; the outer diameter of the end of the valve core 4 close to the joint 1 is the same as the inner diameter of the oil passage chamber 6B, and the outer diameter of the end of the valve core 4 close to the oil passage chamber 6B is smaller than the inner diameter of the oil passage chamber 6B.

[0020] The working principle of the utility model is as follows:

[0021] This component is used in 40-60MPa ultra-high pressure working pressure systems. It is installed outside the hydraulic cylinder and is easy to disassemble and replace.

[0022] This component is used for the oil inlet at the large chamber end of the hydraulic cylinder of the top-up type. When the piston rod of the hydraulic cylinder is topped up, the oil flows from the oil chamber B7 to the oil chamber A8 through the oil chamber 6. At this time, the oil opens the valve core 4, the oil is not throttled, and the piston rod extends normally.

[0023] When the piston rod of the hydraulic cylinder needs to be retracted, the traditional components will accelerate the retraction of the piston rod due to the pressure relief of the large chamber and the excessive weight of the ejected object. The speed is too fast, causing irreversible damage to the hydraulic cylinder and other components. After installing the device, when the piston rod is retracted, the oil flows from the oil chamber A8 to the oil chamber B7 into the oil chamber 6. When passing through the valve core 4, the oil pushes the valve core 4 back through the internal channel 9 of the valve core. Due to the smaller aperture, it plays a buffering and throttling role. Since the end of the valve core 4 close to the small connecting chamber 10 is in a conical column shape, the outer diameter of the end with a smaller outer diameter of the conical column is smaller than the inner diameter of the small connecting chamber 10, and the outer diameter of the end with a larger outer diameter of the conical column is larger than the inner diameter of the small connecting chamber 10. Therefore, the outer wall of the valve core 4 can block the small connecting chamber 10, and the oil refluxes through the damping hole 11, further playing a buffering and throttling role. Through the buffering and throttling design of the valve core 4, the retraction speed of the piston rod is effectively reduced, the pressure shock is reduced, and the safe operation of the hydraulic system and related components is protected.

[0024] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A buffer throttling transition joint, comprising a valve seat (5), an oil passage cavity (6) being formed inside the valve seat (5), and a valve core (4) slidingly arranged in the oil passage cavity (6); the characteristics are: An oil cavity B (7) is formed at one end of the valve seat (5), and a connecting hole is formed at one end of the valve seat (5) away from the oil cavity B (7). A joint (1) is provided and connected to the valve seat (5) through the connecting hole. An oil cavity A (8) is formed inside the joint (1), and the oil cavity (6), the oil cavity B (7) and the oil cavity A (8) are connected. A valve core internal channel (9) is formed on the valve core (4), and the valve core internal channel (9) is connected to the oil cavity (6), and the two ends of the valve core internal channel (9) are respectively located at the valve core ( 4) an end surface close to the joint (1) and an outer wall of the valve core (4) close to the oil passage chamber (6) B, the oil chamber B (7) and the oil passage chamber (6) are connected via a small connecting chamber (10), the inner diameter of the small connecting chamber (10) is smaller than the inner diameters of the oil passage chamber (6) and the oil chamber B (7), and the outer wall of the valve core (4) can block the small connecting chamber (10), and a damping hole (11) is provided at one end of the valve core (4) close to the oil passage chamber (6) B, and the damping hole (11) is connected to the internal channel (9) of the valve core.

2. A buffer throttling transition joint according to claim 1, characterized in that: A spring (3) is fixed to one end of the valve core (4) close to the joint (1), and the other end of the spring (3) is fixed to the joint (1).

3. The buffer throttling transition joint according to claim 1, characterized in that: The end of the valve core (4) close to the small connecting cavity (10) is in the shape of a cone, the outer diameter of the end of the cone with a smaller outer diameter is smaller than the inner diameter of the small connecting cavity (10), and the outer diameter of the end of the cone with a larger outer diameter is larger than the inner diameter of the small connecting cavity (10).

4. The buffer throttling transition joint according to claim 1, characterized in that: The outer diameter of the end of the valve core (4) close to the joint (1) is the same as the inner diameter of the oil passage chamber (6) B, and the outer diameter of the end of the valve core (4) close to the oil passage chamber (6) B is smaller than the inner diameter of the oil passage chamber (6) B.

5. The buffer throttling transition joint according to claim 1, characterized in that: A diamond ring (2) is installed between the valve seat (5) and the joint (1).

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