Anti-falling and anti-leakage one-way throttle valve

Abstract

The utility model provides an anti-falling and anti-leakage one-way throttle valve, and belongs to the technical field of throttle valves. The problem that in the prior art, a valve element of a throttling valve is prone to axial movement or radial deviation is solved. The throttle valve comprises a valve body, a main body section of the valve body is of an integrally-formed structure and is of a regular cylinder structure, connecting ports are arranged at the left end and the right end of the valve body, fine threads are arranged outside the connecting ports on the two sides of the valve body, and a main flow channel, a throttle control channel and an oil inlet channel are formed in the valve body. The throttling control channel and the oil inlet channel are located on the same side of the valve body, the main flow channel is located on the other side of the valve body, the main flow channel is communicated with the oil inlet channel and then communicated with the throttling control channel, the oil inlet channel is located above the throttling control channel in an inclined mode, and the outer side hole diameter of the throttling control channel is larger than the inner side hole diameter of the throttling control channel. A spring cavity is formed in the position, close to the outer side, of the throttling control channel, and a spring assembly is arranged in the spring cavity. The utility model has the advantages of anti-drop and anti-leakage performance and stable structure.

Description

Technical Field

[0001] This utility model belongs to the field of throttle valve technology and relates to a one-way throttle valve that is prevented from detaching and leaking. Background Technology

[0002] Throttling valves control fluid flow by changing the throttling cross-section or length, and adjust flow velocity and flow rate by utilizing changes in the flow area of ​​the throttling orifice, thereby controlling parameters such as pressure and speed. In hydraulic systems, they are often combined with relief valves to form a throttling speed control system to achieve speed control of actuators.

[0003] Chinese patent publication number CN201874910U discloses a one-way throttle valve, including a valve body, an O-ring, a valve core, a retaining ring, and an elastic retaining ring for the orifice. The valve core is installed in the inner cavity of the valve body. The front end of the throttle orifice of the valve core is connected to end A, and the rear end is connected to end B of the valve core orifice. An O-ring is installed on the inclined surface at the front end of the valve core. A sealing ring mounting groove is opened on the inclined surface at the front end of the valve core. The O-ring is installed in the sealing ring mounting groove. There is a gap between the outer circular surface of the valve core and the inner cavity wall of the valve body.

[0004] The patent provides a one-way throttle valve that only uses a retaining ring and a hole-type elastic retaining ring for axial positioning, lacking a radial anti-loosening design. Under high-frequency vibration or impact conditions, the valve core is prone to axial movement or radial displacement, resulting in misalignment of the sealing surface. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a one-way throttle valve that prevents detachment and leakage.

[0006] The objective of this utility model can be achieved through the following technical solution: a one-way throttle valve with anti-detachment and anti-leakage, comprising a valve body, wherein the main body of the valve body is an integrally formed structure and a regular cylindrical structure, and connection interfaces are provided at both ends of the valve body. The connection interfaces on both sides of the valve body are provided with fine threads. The valve body has a main flow channel, a throttle control channel and an oil inlet channel inside. The throttle control channel and the oil inlet channel are located on the same side of the valve body, and the main flow channel is located on the other side of the valve body. The main flow channel is connected to the oil inlet channel and then connected to the throttle control channel. The oil inlet channel is located diagonally above the throttle control channel. The outer diameter of the throttle control channel is larger than the inner diameter. A valve core is provided in the throttle control channel. A spring cavity is provided near the outer side of the throttle control channel, and a spring assembly is provided in the spring cavity. The spring assembly provides preload force for the valve core.

[0007] In the aforementioned anti-detachment and anti-leakage one-way throttle valve, a first O-ring is fixedly installed on one end face of the valve body.

[0008] In the aforementioned anti-detachment and anti-leakage one-way throttle valve, an O-ring sealing groove is formed between the connection interface and the valve body, and a second O-ring is fixedly installed in the O-ring sealing groove.

[0009] In the aforementioned anti-detachment and anti-leakage one-way throttle valve, one end of the spring cavity passes through the valve body and a sealing block is fixedly installed at one end of the spring cavity.

[0010] Compared with existing technologies, the anti-detachment and anti-leakage one-way throttle valve provided by this utility model has the following beneficial effects: 1. The main body of the valve body adopts an integrated molding process, eliminating splicing gaps, improving structural rigidity, and preventing parts from loosening and falling off. The fine-pitch threads of the connection interface are matched with high-precision tolerances, increasing the thread meshing area and pre-tightening force, and strengthening the connection strength; 2. The first O-ring seal forms a high-pressure static seal on one end face of the valve body, eliminating end face leakage. The second O-ring in the O-ring sealing groove is compressed when the fine-pitch threads at the end of the valve body are pre-tightened, sealing the thread gap and buffering pressure impact, realizing double anti-leakage with threads and sealing rings, adapting to dynamic fluid conditions; 3. The spring assembly provides a stable pre-tightening force for the valve core, ensuring throttling adjustment accuracy, and reducing wear through the reset function, improving long-term operational reliability; 4. The oblique layout of the oil inlet channel and the throttling control channel allows the fluid to be stably distributed through the main channel first, and then enter the throttling control channel, avoiding cavitation and damage to the seals, and adapting to the flow regulation requirements of high-pressure hydraulic systems. Attached Figure Description

[0011] Figure 1 This is a schematic cross-sectional view of the present invention;

[0012] Figure 2 This is a side view of the structure of this utility model.

[0013] In the diagram: 1. Valve body; 11. O-ring sealing groove; 2. Connection interface; 21. Fine thread; 3. Main flow channel; 4. Throttling control channel; 5. Oil inlet channel; 6. Valve core; 7. Spring cavity; 71. Spring assembly; 72. Sealing block; 8. First O-ring seal; 9. Second O-ring seal. Detailed Implementation

[0014] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0015] like Figures 1 to 2As shown, this embodiment includes a valve body 1, whose main body is integrally molded to form a regular columnar structure with no internal splicing gaps, enhancing structural rigidity and preventing component loosening. Connection interfaces 2 are provided at both ends of the valve body 1, with fine-pitch threads 21 machined externally to improve thread engagement accuracy and preload, enhancing connection stability. The main flow channel 3 is located on the other side of the valve body 1, connecting to the oil inlet channel 5 and then to the throttling control channel 4. The oil inlet channel 5 is obliquely positioned above the throttling control channel 4, optimizing the flow path layout, avoiding fluid impact on the seals, and adapting to high-pressure hydraulic systems. The outer diameter of the throttling control channel 4 is larger than the inner diameter, housing a valve core 6. A spring assembly 71 is installed in the spring cavity 7 near the outer side, providing preload to the valve core and ensuring throttling accuracy and reset stability. One end of the spring cavity 7 passes through the valve body 1 and fixes the sealing block 72, preventing the spring assembly 71 from being eroded by fluid and ensuring sealing performance.

[0016] To elaborate further, such as Figure 1 As shown, the first O-ring 8 is installed on the end face of the valve body 1 near the main flow channel 3. High-pressure static sealing is achieved through end face compression to prevent end face leakage.

[0017] To elaborate further, such as Figure 1 As shown, the second O-ring 9 is placed in the O-ring sealing groove 11 between the connection interface 2 and the valve body 1. When the fine thread 21 is pre-tightened, it compresses and seals, blocking the gap of the fine thread 21 and buffering the pressure, thus achieving double leak prevention and adapting to dynamic fluid conditions.

[0018] The working principle of this utility model is as follows: the fluid enters the throttling control channel 4 through the oil inlet channel 5 and the main flow channel 3. The valve core 6 adjusts the opening under the preload of the spring assembly 71 to control the flow rate. The first O-ring seal 8 and the second O-ring seal 9 seal the end face and the threaded connection part respectively to prevent leakage. The sealing block 72 of the spring cavity 7 protects the spring assembly and ensures the stable operation of the valve core 6.

[0019] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0020] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A kind of anti-drop leak-proof one-way throttle valve, comprising valve body (1), the main body section of the valve body (1) is integrally formed structure and is regular cylinder structure, it is characterized by: The valve body (1) is provided with connection interfaces (2) at both ends. The connection interfaces (2) on both sides of the valve body (1) are provided with fine thread (21). The valve body (1) is provided with a main channel (3), a throttling control channel (4) and an oil inlet channel (5). The throttling control channel (4) and the oil inlet channel (5) are located on the same side of the valve body (1). The main channel (3) is located on the other side of the valve body (1). The main channel (3) is connected to the oil inlet channel (5) and then connected to the throttling control channel (4). The oil inlet channel (5) is located diagonally above the throttling control channel (4). The outer diameter of the throttling control channel (4) is larger than the inner diameter. A valve core (6) is provided in the throttling control channel (4). A spring cavity (7) is provided near the outer side of the throttling control channel (4) and a spring assembly (71) is provided in the spring cavity (7). The spring assembly (71) provides preload force for the valve core (6).

2. The anti-disengagement and anti-leakage one-way throttling valve according to claim 1, characterized in that: A first O-ring (8) is fixedly installed on one end face of the valve body (1).

3. The anti-disengagement and anti-leakage one-way throttling valve according to claim 1, characterized in that: An O-ring sealing groove (11) is formed between the connection interface (2) and the valve body (1) body, and a second O-ring (9) is fixedly installed in the O-ring sealing groove (11).

4. The anti-dislodgement and anti-leakage one-way choke valve of claim 1, wherein: One end of the spring cavity (7) passes through the valve body (1), and a sealing block (72) is fixedly installed at one end of the spring cavity (7).

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