A one-way throttle valve

Abstract

This utility model relates to the field of hydraulic technology and discloses a one-way throttle valve, comprising: a valve body, a spring, a valve core, and a valve seat; the valve body has a connection port and a first oil port, and the valve seat has a guide cavity communicating with the connection port, with the valve core mounted in the guide cavity by the spring; the valve seat has an axially penetrating valve seat hole and a radially extending second oil port communicating with the valve seat hole; the valve core controls the fluid flow between the valve seat hole and the second oil port; the second oil port and the valve seat hole at the end of the valve seat away from the valve body have a throttling notch; when the valve core is in close contact with the second oil port and the sealing valve port of the valve seat hole at the end of the valve seat away from the valve body, the throttling notch communicates with the second oil port. This solution can achieve one-way throttling function with a single valve, which has the advantages of simpler structure, smaller size, material saving, and lower cost compared to the traditional one-way valve plus throttle valve method; its simple structure allows for wide application in various hydraulic equipment.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic technology, specifically to a one-way throttle valve. Background Technology

[0002] A one-way throttle valve is a type of valve that combines the functions of a one-way valve and a throttle valve. It is used to control the flow rate of fluid in one direction while throttling it in the other direction.

[0003] Current one-way valves and throttle valves generally adopt the form of a one-way valve connected in parallel with a throttle orifice, or a structure with a cone valve core and a throttle orifice or throttle groove. Figure 1 This is a schematic diagram illustrating the working principle of a check valve. Figure 2 This is a schematic diagram of a one-way throttle valve structure formed by using a cone valve core with a throttle orifice or throttle groove. Figure 3 A schematic diagram of a one-way throttle valve structure formed by connecting a one-way valve in parallel with a throttle orifice, as shown below. Figure 1 , Figure 2 and Figure 3 As shown, in the aforementioned one-way throttle valve, when the oil flows from port 1 to port 2, the oil pushes the relevant valve core structure, allowing the oil to flow normally. When the oil flows in the opposite direction from port 2 to port 1, it can only flow through the throttle orifice, thus achieving the throttling function. The aforementioned one-way throttle valve is large in size, complex in structure, and expensive. Utility Model Content

[0004] The present invention aims to provide a one-way throttle valve to solve the problems of large size, complex structure and high cost of current one-way throttle valves.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a one-way throttle valve, comprising: a valve body, a spring, a valve core, and a valve seat; the valve body is provided with a connection port for connecting to the valve seat, the valve body is provided with a first oil port, and the valve body is provided with a guide cavity communicating with the connection port; the valve seat is provided with an axially penetrating valve seat hole, and the valve seat is provided with a radially extending second oil port at the inner end of the valve body, the second oil port communicating with the valve seat hole, the valve seat part being located in the guide cavity, and the second oil port and the first oil port communicating through the guide cavity; one end of the valve core is mounted on the inner wall of the guide cavity by a spring, and the other end of the valve core is located in the valve seat hole; the valve core is used to control the liquid flow between the valve seat hole and the second oil port, the second oil port and the valve seat hole at the end of the valve seat away from the valve body are provided with a throttling notch, and when the valve core is in close contact with the second oil port and the sealing valve port of the valve seat hole at the end of the valve body away from the valve body, the throttling notch communicating with the second oil port.

[0006] The principle of this scheme is as follows: When the oil flows forward in the corresponding hydraulic system, the oil pushes the valve core to overcome the spring force, causing the second oil port and the valve seat hole at the end away from the valve body to be fully opened. The oil flows rapidly from the valve seat hole and the throttling notch to the second oil port at the same time. When the oil flows backward in the corresponding hydraulic system, the oil and the spring push the valve core to move towards the sealing valve port of the valve seat hole to close the valve seat hole. At this time, the oil can only move from the second oil port to the throttling notch, and then flow from the throttling notch to the corresponding hydraulic pipeline. The throttling notch is used to achieve the reverse throttling effect.

[0007] Advantages of this solution: This solution can achieve one-way throttling function with a single valve. Compared with the traditional one-way valve plus throttling valve, it has the advantages of simpler structure, smaller size, material saving and lower cost; the simple structure can be widely used in various hydraulic equipment.

[0008] Preferably, the number of throttling notches is one or more, and the throttling notches are evenly distributed circumferentially on the inner wall of the valve seat hole. The evenly distributed circumferential throttling notches ensure uniform liquid flow within the valve seat.

[0009] Preferably, the valve seat hole includes a first valve seat hole and a second valve seat hole that are connected. The first valve seat hole is located near the valve core end of the valve seat. The diameter of the first valve seat hole is larger than the diameter of the valve core, and the diameter of the second valve seat hole is smaller than the diameter of the valve core. The connection between the first valve seat hole and the second valve seat hole forms a sealing valve port. Dividing the valve seat hole into two parts with different diameters saves material and makes it easier for the valve core to move within the valve seat hole without the need for a sealing section, reducing wear and tear on the valve core and extending its service life.

[0010] Preferably, the throttling notch is arc-shaped. Setting the throttling notch in an arc shape guides the liquid through a smooth transition, while simultaneously distributing stress evenly and reducing stress concentration at this location.

[0011] Preferably, the center of the throttling notch is located within the sealing valve port area, and the axis of the throttling notch is parallel to the axis of the sealing valve port. An eccentric arc-shaped groove is formed at the edge of the sealing valve port to disperse stress and avoid excessive stress concentration.

[0012] Preferably, the outer wall of the throttling notch is located within the range of the first valve seat hole to avoid affecting the stability of the valve seat structure.

[0013] Preferably, the valve core is spherical or conical, and the ball or cone is not affected by the installation deviation between the two and the valve seat. When in contact, they will adaptively fit and seal. When the valve seat is tilted or worn, the ball will fit with the valve seat under the action of fluid pressure, which will extend the service life of the structure and reduce costs.

[0014] Preferably, the first oil port is located at the end of the valve body away from the valve seat, and the first oil port is axially disposed on the valve body.

[0015] Preferably, the axis of the spring coincides with the axis of the valve body to ensure uniform force transmission, keep the spring stable under force, avoid structural deformation or failure due to eccentricity, and improve the service life of the structure.

[0016] Preferably, the valve body has a protrusion, and the valve seat has a groove for mounting the protrusion. The protrusion and groove make the connection between the valve block and the valve body more stable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the working principle of the one-way valve in the background technology of this utility model.

[0018] Figure 2 This is a schematic diagram of a one-way throttle valve structure formed by opening a throttle hole or throttle groove with a conical valve core, which is the background technology of this utility model.

[0019] Figure 3 This is a schematic diagram of a one-way throttle valve structure formed by connecting a one-way valve in parallel with a throttle port, which is the background technology of this utility model.

[0020] Figure 4 This is a structural schematic diagram of an embodiment of the present utility model.

[0021] Figure 5 This is a side view of the structure of an embodiment of the present utility model.

[0022] Figure 6 This is an embodiment of the present utility model. Figure 5 A schematic diagram of the AA direction section.

[0023] Figure 7 This is a schematic diagram of the valve seat according to an embodiment of the present utility model.

[0024] Figure 8 This is a side view of the valve seat according to an embodiment of the present utility model. Detailed Implementation

[0025] The following detailed description illustrates the specific implementation method:

[0026] The reference numerals in the accompanying drawings include: valve body 1, first oil port 11, connection port 12, guide cavity 13, spring 2, steel ball 3, valve seat 4, sealing valve port 41, throttling notch 42, second oil port 43, first valve seat hole 44, second valve seat hole 45, and sealing ring 5.

[0027] Example:

[0028] A one-way throttle valve, such as Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, it includes: valve body 1, spring 2, valve core and valve seat 4.

[0029] The valve body 1 is provided with a connection port 12 for connecting the valve seat 4. One end of the valve seat 4 is located inside the connection port 12, and the valve body 1 and the valve seat 4 are connected together. In this embodiment, the valve body 1 is provided with a protrusion, and the valve seat 4 is provided with a groove for installing the protrusion. The connection between the valve body 1 and the valve seat 4 is more stable through the protrusion and the groove.

[0030] The valve body 1 has an axial first oil port 11, which is evenly distributed in a ring on the valve body 1. A guide cavity 13 is provided inside the valve body 1, with both ends of the guide cavity 13 communicating with the first oil port 11 and the connecting port 12, respectively. The first oil port 11, the guide cavity 13, and the connecting port 12 are interconnected. In this design, the axis of the guide cavity 13, the axis of the connecting port 12, and the axis of the valve body 1 coincide. The number and size of the first oil ports 11 in this embodiment are set according to actual needs. A liquid guiding groove is also provided on the inner wall of the guide cavity 13.

[0031] The valve core is mounted in the valve seat guide cavity 13 via spring 2. The axis of spring 2 coincides with the axis of valve body 1, ensuring uniform force transmission and maintaining stability of spring 2 under load. This prevents structural deformation or failure due to eccentricity and improves the service life of the structure. Specifically, the valve body 1 is provided with a limiting groove for installing spring 2. The diameter of the limiting groove is slightly larger than the diameter of spring 2, facilitating the installation of spring 2.

[0032] The valve seat 4 has an axially penetrating valve seat hole and a radially extending second oil port 43. The second oil port 43 communicates with the valve seat hole and with the first oil port 11. In this embodiment, the size of the valve seat hole is set according to actual needs.

[0033] The valve seat bore includes a first valve seat bore 44 and a second valve seat bore 45 that are connected. The first valve seat bore 44 is located near the valve core end of the valve seat 4, and its diameter is larger than that of the valve core. The diameter of the second valve seat bore 45 is smaller than that of the valve core. The connection between the first valve seat bore 44 and the second valve seat bore 45 forms a sealing valve port 41. Dividing the valve seat bore into two parts with different diameters saves material and eliminates the need for a sealing section in the valve seat bore, making movement easier, reducing wear on the valve core, and extending the service life of the valve core.

[0034] The valve seat 4 is located in the guide cavity 13 of the valve body 1. A preset distance is left between the outer wall of the valve seat 4 and the inner wall of the guide cavity 13 so that the second oil port and the guide cavity 13 can be connected, so that the oil can enter the guide cavity 13 and achieve the purpose of controlling the movement of the valve core through the oil.

[0035] One end of the valve core is located inside the valve seat hole, and the valve core is used to control the liquid flow between the valve seat hole and the second oil port 43. The valve core is spherical or conical, and the ball or cone is not affected by the installation deviation between the ball and the valve seat 4. When in contact, it will automatically fit and seal. When the valve seat 4 is tilted or worn, the valve core will fit against the valve seat 4 under the action of fluid pressure, extending the service life of the structure and reducing costs. In this embodiment, the valve core is a steel ball 3.

[0036] A throttling notch 42 is provided on the inner wall of the valve seat hole at the end of the valve seat 4 away from the valve body 1. When the valve core is in close contact with the sealing valve port of the second oil port 43 and the valve seat hole at the end of the valve seat 4 away from the valve body 1, the throttling notch 42 is connected to the second oil port 43. When the oil flows forward in the corresponding hydraulic system, the oil flows rapidly from the valve seat hole and the throttling notch 42 to the second oil port 43 simultaneously. When the oil flows backward in the corresponding hydraulic system, the oil can only move from the second oil port 43 to the throttling notch 42, and then flow from the throttling notch 42 to the corresponding hydraulic pipeline. The throttling notch 42 is used to achieve the reverse throttling effect. The unidirectional throttling structure of this solution is simpler, smaller in size, and lower in cost. When the oil flows in reverse from the first port 11 to the second port 43, the steel ball 3 presses on the sealing valve port 41. Due to the throttling notch 42, there is a reserved notch at the edge of the sealing valve port 41, which cannot be completely sealed. The oil will flow out from between the steel ball 3 and the throttling notch 42, thus achieving the effect of reverse throttling. In this scheme, different throttling effects can be achieved by controlling the size, shape and number of notches.

[0037] The valve seat bore has one or more throttling notches 42, which are evenly distributed circumferentially on the inner wall of the valve seat bore. The evenly distributed circumferential throttling notches 42 ensure uniform liquid flow within the valve seat 4. In this design, the throttling notches 42 are arc-shaped. This arc shape guides the liquid through a smooth transition and simultaneously distributes stress evenly, reducing stress concentration at this location. The outer wall of the throttling notches 42 is located within the first valve seat bore 44 to avoid affecting the structural stability of the valve seat 4.

[0038] The center of the throttling notch 42 is located within the sealing valve port 41, and the axis of the throttling notch 42 is parallel to the axis of the sealing valve port 41. An eccentric arc-shaped groove is formed at the edge of the sealing valve port 41 to disperse stress and avoid excessive stress concentration. The flow cross-sectional area at the connection between the eccentric throttling notch 42 and the circular hole is gradually distributed, with a larger opening on the near-eccentric side and a smaller opening on the far-eccentric side. The liquid will first pass through the near-center side of the throttling notch 42, forming a controllable non-uniform flow field, which allows for asymmetric flow regulation.

[0039] The other end of the valve seat 4 is provided with a sealing groove for installing the sealing ring 5. In this embodiment, the sealing ring is an O-ring to ensure the sealing between the valve seat 4 and the hydraulic passage of the corresponding hydraulic system.

[0040] The specific implementation process is as follows:

[0041] When the oil flows forward in the corresponding hydraulic system, that is, when the oil flows from the second port 43 to the first port 11, the oil pushes the steel ball 3 to move away from the valve seat 4. The steel ball 3 overcomes the elastic force of the spring 2 to fully open the sealing valve port 41, and the oil flows rapidly from the sealing valve port 41 and the throttling notch 42 to the second port 43 at the same time. When the oil flows in reverse in the corresponding hydraulic system, that is, when the oil flows from the first port 11 to the second port 43, the oil and the spring together push the steel ball 3 to move closer to the valve seat 4 to seal the sealing valve port 41. At this time, the oil can only move from the second port 43 to the throttling notch 42, and then flow from the throttling notch 42 to the corresponding hydraulic pipeline, using the throttling notch 42 to achieve the reverse throttling effect.

[0042] Advantages of this solution: The one-way throttle valve of this utility model has one or more notches machined on the sealing valve port 41 of the embedded one-way valve. The machined notches and the steel ball 3 and the sealing valve port 41 form a throttle hole that can generate a throttle effect, which plays a role in reverse throttling. Compared with the traditional one-way throttle structure, the structure is simplified, the size is smaller, and the cost is lower; it can be widely used in various hydraulic equipment.

[0043] The above descriptions are merely embodiments of this utility model, and common technical solutions and / or characteristics known in the scheme are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A one-way throttle valve, characterized in that, include: Valve body, spring, valve core, and valve seat; The valve body is provided with a connection port for connecting to the valve seat, the valve body is provided with a first oil port, and the valve body is provided with a guide cavity communicating with the connection port. The valve seat is provided with an axially penetrating valve seat hole, and the valve seat is provided with a radial second oil port at the inner end of the valve body. The second oil port communicates with the valve seat hole, and the valve seat part is located in the guide cavity. The second oil port and the first oil port are connected through the guide cavity. One end of the valve core is mounted on the inner wall of the guide cavity by a spring, and the other end of the valve core is located in the valve seat hole. The valve core is used to control the liquid flow between the valve seat hole and the second oil port. The second oil port and the valve seat hole at the end away from the valve body are provided with a throttling notch. When the valve core is in close contact with the second oil port and the sealing valve port of the valve seat hole at the end away from the valve body, the throttling notch is connected to the second oil port.

2. The one-way throttle valve according to claim 1, characterized in that: The number of throttling notches is one or more, and the throttling notches are evenly distributed circumferentially on the inner wall of the valve seat hole.

3. A one-way throttle valve according to claim 1, characterized in that: The valve seat hole includes a first valve seat hole and a second valve seat hole that are connected. The first valve seat hole is located near the valve core end of the valve seat. The diameter of the first valve seat hole is larger than the diameter of the valve core, and the diameter of the second valve seat hole is smaller than the diameter of the valve core. The connection between the first valve seat hole and the second valve seat hole forms a sealing valve port.

4. A one-way throttle valve according to claim 3, characterized in that: The throttling gap is arc-shaped.

5. A one-way throttle valve according to claim 4, characterized in that: The center of the throttling notch is located within the sealing valve port area, and the axis of the throttling notch is parallel to the axis of the sealing valve port.

6. A one-way throttle valve according to claim 3, characterized in that: The outer wall of the throttling notch is located within the range of the first valve seat hole.

7. A one-way throttle valve according to claim 1, characterized in that: The valve core is spherical or conical.

8. A one-way throttle valve according to claim 1, characterized in that: The first oil port is located at the end of the valve body away from the valve seat, and the first oil port is axially arranged on the valve body.

9. A one-way throttle valve according to claim 1, characterized in that: The axis of the spring coincides with the axis of the valve body.

10. A one-way throttle valve according to claim 1, characterized in that: The valve body is provided with a protrusion, and the valve seat is provided with a groove for mounting the protrusion.

Images