Check valve of full-hydraulic steering gear

Abstract

The utility model relates to a one-way valve of a full-hydraulic steering gear and belongs to the technical field of machinery. A one-way valve of a full-hydraulic steering gear comprises a valve seat, a spring and a valve element which are installed in the full-hydraulic steering gear, four sections of seat bodies which are gradually shrunk forwards are arranged on the periphery of the valve seat along the tail end, a boss is formed at the connecting position of each section of seat body, the front end of the valve seat is connected with the valve element, and the spring is connected between the valve seat and the valve element in a sleeved mode. The utility model has the advantages of simple structure, convenience in use, smaller overall size, convenience in positioning, good sealing performance, compact structure, low cost and suitability for popularization.

Description

Technical Field

[0001] The utility model relates to a full hydraulic steering gear one-way valve, belonging to the technical field of machinery. Background Art

[0002] A one-way valve, also called a non-return valve or check valve, is used to allow fluid to flow in from a specific water inlet and out from a specific water outlet, while the fluid cannot flow in the opposite direction. This characteristic of the one-way valve makes it widely used in the field of fluid control, avoiding damage caused by fluid backflow or backflow. Existing one-way valves are large in size, complex in structure, difficult to locate, occupy more installation space and have high costs. A one-way valve is usually composed of a valve body, a valve cover, a valve core (or valve disc) and a spring. The valve body is usually a hollow cylinder, which is connected to the pipeline through a small inlet and a large outlet. The valve cover is connected to the valve body and fixes the position of the piston so that the valve core can move under appropriate circumstances. The valve core is a sphere or a cone, which is freely lifted or sunk by the pressure difference of the fluid, thereby controlling the flow direction of the fluid. When used in a full hydraulic steering gear, there are many problems, such as inaccurate positioning of the valve core and the valve body, the need to disassemble the whole for troubleshooting, inconvenient maintenance and repair, low flexibility, and narrow application scenarios. Utility Model Content

[0003] The purpose of the utility model is to propose a full hydraulic steering gear one-way valve for facilitating positioning and maintenance in view of the problems existing in the prior art.

[0004] In order to achieve the above purpose, the utility model is a full hydraulic steering check valve, comprising a valve seat, a spring and a valve core installed in the full hydraulic steering gear, the outer periphery of the valve seat has four sections of seat bodies that gradually shrink forward along the end, and a boss is formed at the connection of each section of the seat body, the front end of the valve seat is connected to the valve core, and a spring is sleeved between the valve seat and the valve core. The matching distance between the valve seat and the valve core is controlled by adjusting the elastic force.

[0005] The first section of the outer periphery of the seat body is provided with threads, and the fourth section of the outer periphery is sleeved with a valve core.

[0006] The valve seat has a threaded inner hole, and the inner hole is connected to the bolt on the stator. In this way, the double-threaded valve seat saves the overall installation space and ensures the compactness of the overall structure.

[0007] The valve core is composed of a cylindrical base and an umbrella-shaped core head extending outward from the base. The outer periphery of the core head is a smooth conical surface and the top is a flat surface, which is easy to cooperate with the hole on the valve body for positioning.

[0008] The valve core has a smooth valve core inner hole, and the inner hole is matched and connected with the fourth section of the valve seat body.

[0009] One end of the spring is clamped on the second boss of the seat body, and the other end is clamped on the base of the valve core.

[0010] The one-way valve has a throttling position and a flow position. When the liquid flows from the valve seat end to the valve core end, the spring pushes the valve core to block the valve port, and the one-way valve is in the throttling position; conversely, the valve core presses the spring and moves close to the valve seat to leave the valve port, and the one-way valve is in the flow position.

[0011] The utility model has a simple structure and is easy to use. Its beneficial effect is that the split structure makes the maintenance and repair of the one-way valve more convenient. A certain component can be replaced or repaired separately without replacing the entire system. It is highly flexible and has great advantages for different working environments and space restrictions. The split structure can be flexibly installed in the full hydraulic steering gear, with accurate positioning, good sealing, compact structure and low cost, and is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings.

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0014] Figure 2 for Figure 1 Schematic diagram of the structure of the middle valve seat.

[0015] Figure 3 for Figure 1 Schematic diagram of the structure of the middle valve core.

[0016] Figure 4 for Figure 1 Reference diagram for usage status.

[0017] Figure 5 This is a schematic diagram of the structure of a traditional integrated one-way valve. DETAILED DESCRIPTION

[0018] Example

[0019] The one-way valve of the prior art is as follows Figure 5 As shown, the valve seat 5-1, valve core 5-2, spring seat 5-3 and spring 5-4 form an integrated structure, which is installed by the thread on the valve seat 5-1. In the original state after assembly, the valve core is only exposed to a short distance from the valve seat, which is difficult to locate. After assembly, it cannot be disassembled and needs to be replaced as a whole after damage. The structure of this embodiment is as shown in FIG. Figure 1-4As shown, a fully hydraulic steering one-way valve comprises a valve seat 1, a spring 2 and a valve core 3 installed in the fully hydraulic steering valve body. The outer periphery of the valve seat 1 has four sections of a seat body that tapers forward along the end, and a boss is formed at the connection of each section of the seat body. The front end of the valve seat 1 is connected to the valve core 3, and the spring 2 is sleeved between the valve seat 1 and the valve core 3. This one-way valve is a split structure, and the matching distance between the valve seat 1 and the valve core 3 is controlled by adjusting the elastic force. The outer periphery of the first section 1-1 of the seat body of the valve seat 1 is threaded, and the outer periphery of the fourth section 1-4 is sleeved with the valve core. The valve seat 1 has a threaded inner hole 1-5, and the inner hole 1-5 is connected to the bolt 4 on the stator 5. The valve core 3 is composed of a cylindrical base 3-1 and a core head 3-2 extending outward from the base to form an umbrella shape. The outer periphery of the core head 3-2 is a smooth conical surface 3-2-1, and the top is a flat surface 3-2-2. The valve core 3 has a smooth inner hole 3-3 of the valve core, and the inner hole 3-3 of the valve core is connected with the fourth section 1-4 of the valve seat body. One end of the spring 2 is clamped to the second boss 1-6 of the seat body, and the other end is clamped to the base 3-1 of the valve core. After assembly, the valve core has a long positioning length and is easy to position. After a problem occurs, a component can be replaced or repaired separately. The one-way valve has a throttling position and a flow position. When the liquid flows from the valve seat end to the valve core end, the spring pushes the valve core to block the valve port, and the one-way valve is in the throttling position; on the contrary, the valve core presses the spring and moves close to the valve seat to leave the valve port, and the one-way valve is in the flow position. When in use: the top of the front end of the valve core fits with the hole on the valve body that is smaller than its maximum radius, and the spring and valve seat are placed in turn. It is installed and fixed on the valve body through the external thread of the valve seat, and the internal thread of the valve seat is used for bolt fixing, thereby connecting the stator. When the liquid flows from the valve seat end to the valve core end, the valve port is closed, which plays a throttling role; on the contrary, the liquid can flow.

[0020] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A full hydraulic steering gear one-way valve, comprising a valve seat, a spring and a valve core installed in a full hydraulic steering gear valve body, characterized in that: The outer periphery of the valve seat has four sections of seat bodies that taper forward along the end, and a boss is formed at the connection of each section of the seat body. The front end of the valve seat is connected to the valve core, and a spring is sleeved between the valve seat and the valve core.

2. The fully hydraulic steering gear one-way valve according to claim 1, characterized in that: The first section of the outer periphery of the seat body is provided with threads, and the fourth section of the outer periphery is sleeved with a valve core.

3. The fully hydraulic steering gear one-way valve according to claim 1, characterized in that: The valve seat has an inner hole with a thread, and the inner hole is connected to a bolt on the stator.

4. The fully hydraulic steering gear one-way valve according to claim 1, characterized in that: The valve core is composed of a cylindrical base and a core head extending outward from the base to form an umbrella shape. The outer periphery of the core head is a smooth conical surface and the top is a flat surface.

5. The fully hydraulic steering gear one-way valve according to claim 4, characterized in that: The valve core has a smooth valve core inner hole, and the inner hole is matched and connected with the fourth section of the valve seat body.

6. The fully hydraulic steering gear one-way valve according to claim 1, characterized in that: One end of the spring is clamped on the second boss of the seat body, and the other end is clamped on the base of the valve core.

7. The fully hydraulic steering gear one-way valve according to claim 1, characterized in that: The one-way valve has a throttling position and a flow position. When the liquid flows from the valve seat end to the valve core end, the spring pushes the valve core to block the valve port, and the one-way valve is in the throttling position; conversely, the valve core presses the spring and moves close to the valve seat to leave the valve port, and the one-way valve is in the flow position.

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