Temperature control one-way restrictor

Abstract

The utility model discloses a kind of temperature control one-way throttling connector, including connector body, the inside of connector body is equipped with ladder through-hole, the upper portion of ladder through-hole inside is provided with spring positioning seat, the lower end of spring positioning seat is provided with guide pipe, the outside between guide pipe and ladder through-hole is provided with cone valve return spring, the inside of spring positioning seat middle part is provided with piston structure, the inside space of piston structure is provided with paraffin silicon oil composite block, the lower end of piston rod of piston structure is provided with reverse spring guide pipe, the lower portion outside of reverse spring guide pipe is provided with cone valve limiting ring, the lower of cone valve limiting ring is provided with reverse spring, the inside of reverse spring, cone valve limiting ring and the inside of reverse spring guide pipe are slidably provided with cone valve, the utility model realizes temperature control one-way throttling, low temperature, high temperature time throttling state switching, improve the function of operation comfort.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic system technology, specifically a temperature-controlled one-way throttling connector. Background Technology

[0002] In hydraulic systems, when using a throttle joint in low-temperature environments, the low temperature and high viscosity of the hydraulic oil cause significant resistance when passing through the throttle joint, resulting in slow flow of the pilot control oil and delayed or unresponsive operation. Conversely, at high temperatures, the absence of a one-way throttle joint causes the directional valve core to return too quickly, leading to large impacts and severely affecting the comfort of equipment operation.

[0003] Therefore, the inventors aimed to solve the problem of designing a temperature-controlled unidirectional throttling connector that switches between throttling states at low and high temperatures to improve operational comfort. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a temperature-controlled one-way throttling connector that can achieve temperature-controlled one-way throttling, switch between throttling states at low and high temperatures, and improve operational comfort.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a temperature-controlled one-way throttling connector, which is installed at the reversing valve core port in a hydraulic system, including a connector body. A stepped through hole is opened on the inner side of the connector body. A spring positioning seat is provided on the upper part of the inner side of the stepped through hole. A guide tube is provided at the lower end of the spring positioning seat. A cone valve return spring is provided between the outer side of the guide tube and the stepped through hole. A piston structure is provided on the inner side of the middle part of the spring positioning seat. A paraffin silicone oil composite block is provided in the inner space of the piston structure. A reverse spring guide tube is provided at the lower end of the piston rod of the piston structure. A cone valve limiting ring is provided on the lower outer side of the reverse spring guide tube. A reverse spring is provided below the cone valve limiting ring. A cone valve is slidably arranged on the inner side of the reverse spring, the cone valve limiting ring and the reverse spring guide tube.

[0006] Furthermore, four evenly distributed through slots are provided on the circumferential surface of the reverse spring guide tube, and the upper end of the cone valve is installed through the inner side of the through slots.

[0007] Furthermore, the cone valve is slidably fitted with the connector body.

[0008] Furthermore, the reverse spring guide tube is slidably fitted with the connector body.

[0009] Furthermore, the spring positioning seat has a through hole.

[0010] Furthermore, a through hole is provided on the end face of the piston rod.

[0011] Furthermore, four evenly distributed first oil holes are provided on the lower circumferential surface of the cone valve, and a second oil hole is provided at the middle of the lower end of the cone valve.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model uses a temperature-controlled one-way throttling connector in the hydraulic system. When the hydraulic oil temperature is low, one-way throttling of the hydraulic oil is not performed, while one-way throttling can be achieved when the hydraulic oil temperature is high. By controlling the one-way throttling valve with different temperatures, temperature-controlled one-way throttling is achieved, and the throttling state can be switched between low and high temperatures, thus improving the operation comfort. Attached Figure Description

[0014] Figure 1 This is a structural view of the present invention.

[0015] Explanation of reference numerals in the attached drawings: 1-Piston structure; 2-Spring positioning seat; 3-Guide tube; 4-Cone valve return spring; 5-Reverse spring guide tube; 6-Cone valve; 7-Cone valve limit ring; 8-Reverse spring; 9-Connector body; 10-Paraffin silicone oil composite block. Detailed Implementation

[0016] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0017] Example 1: See Figure 1 This is a structural view of the present invention, a temperature-controlled one-way throttling connector, installed at the port of the reversing valve core in a hydraulic system. It includes a connector body 9, with a stepped through hole on the inner side of the connector body 9. A spring positioning seat 2 is provided on the upper part of the inner side of the stepped through hole. A sealing ring is provided on the upper end of the spring positioning seat 2 and on the inner side of the connector body 9. Both the upper and lower ends of the connector body 9 are provided with external threads for connecting the valve core. A guide tube 3 is provided at the lower end of the spring positioning seat 2. A cone valve return spring 4 is provided between the outer side of the guide tube 3 and the stepped through hole. A piston structure 1 is provided on the inner side of the middle part of the spring positioning seat 2. A paraffin silicone oil composite block 10 is provided in the inner space of the piston structure 1. A reverse spring guide tube 5 is provided at the lower end of the piston rod of the piston structure 1. A cone valve limiting ring 7 is provided on the lower outer side of the reverse spring guide tube 5. A reverse spring 8 is provided below the cone valve limiting ring 7. A cone valve 6 is slidably arranged on the inner side of the reverse spring 8, the cone valve limiting ring 7, and the reverse spring guide tube 5.

[0018] Four evenly distributed through grooves are provided on the circumferential surface of the reverse spring guide tube 5. The upper end of the cone valve 6 is installed inside the through grooves, and the lower end of the through grooves is open. The cone valve 6 is slidably engaged with the connector body 9. The reverse spring guide tube 5 is slidably engaged with the connector body 9. A through hole is provided on the spring positioning seat 2. A through hole is provided on the end face of the piston rod. Four evenly distributed first oil holes are provided on the lower circumferential surface of the cone valve 6. A second oil hole is provided in the middle of the lower end of the cone valve 6.

[0019] In conventional hydraulic systems, to minimize the impact when the hydraulic valve core is started and stopped, a one-way throttle connector is installed at the end of the directional valve core. When the valve core returns to its original position, the hydraulic oil return is throttled, resulting in a slower valve core return and reduced stopping impact. However, when the hydraulic system operates in a low-temperature environment, the hydraulic oil viscosity is high due to the low ambient temperature. When the valve core returns to its original position and passes through the one-way throttle connector, the hydraulic oil's flow capacity is poor, which will cause the vehicle's movement to lag and directly affect the operating efficiency.

[0020] When the ambient temperature is low, when the user operates the pilot handle, due to the low ambient temperature and hydraulic oil temperature, the paraffin silicone oil composite block 10 in the piston structure 1 cavity is in a solid state with a small volume at low temperature. At this time, the reverse spring 8 pushes the cone valve limit ring 7 to move upward, lifting the cone valve 6, so that the throttling between the cone valve 6 and the connector body 9 fails, and the hydraulic oil no longer passes through the throttling orifice when flowing from top to bottom. This realizes that the one-way throttling valve does not throttle under low temperature conditions, and the problem of lag when the reversing valve core returns to its original position is solved.

[0021] The volume expansion coefficient can be controlled by adjusting the ratio of paraffin and silicone oil composite. When the hydraulic oil temperature rises to 40-70℃, the paraffin and silicone oil composite in the piston structure 1 cavity changes to a liquid physical state at high temperature, causing the piston to push the reverse spring guide tube 5 downward. The reverse spring guide tube 5 pushes the cone valve limiting ring 7 downward, squeezing the reverse spring 8. At this time, the cone valve 6 loses the limit of the cone valve limiting ring 7. Under the force of the cone valve return spring 4, the cone valve 6 moves downward and makes linear contact with the connector body 9. At this time, when the hydraulic oil flows from top to bottom, it can only pass through the throttling orifice of the cone valve 6. When the hydraulic oil temperature is high, the valve core returns to its original position. The hydraulic oil is throttled by the cone valve 6, which satisfies the throttling connector at high temperature and solves the problem of action impact.

[0022] This invention employs a temperature-controlled one-way throttling connector in the hydraulic system. When the hydraulic oil temperature is low, one-way throttling of the hydraulic oil is not performed, while one-way throttling is achieved when the hydraulic oil temperature is high. By controlling the one-way throttling valve at different temperatures, temperature-controlled one-way throttling is realized, and the throttling state switches between low and high temperatures, thereby improving the comfort of operation.

Claims

1. A temperature-controlled one-way throttling connector, installed at the port of a directional valve core in a hydraulic system, characterized in that: The device includes a connector body (9), which has a stepped through hole on its inner side. A spring positioning seat (2) is provided on the upper part of the inner side of the stepped through hole. A guide tube (3) is provided at the lower end of the spring positioning seat (2). A cone valve reset spring (4) is provided between the outer side of the guide tube (3) and the stepped through hole. A piston structure (1) is provided on the inner side of the middle part of the spring positioning seat (2). A paraffin silicone oil composite block (10) is provided in the inner space of the piston structure (1). A reverse spring guide tube (5) is provided at the lower end of the piston rod of the piston structure (1). A cone valve limiting ring (7) is provided on the lower outer side of the reverse spring guide tube (5). A reverse spring (8) is provided below the cone valve limiting ring (7). A cone valve (6) is slidably provided on the inner side of the reverse spring (8), the cone valve limiting ring (7), and the reverse spring guide tube (5).

2. A temperature dependent one-way restrictor according to claim 1, wherein: The reverse spring guide tube (5) has four evenly distributed through slots on its circumference, and the upper end of the cone valve (6) is installed inside the through slots.

3. A temperature dependent one-way restrictor according to claim 1, wherein: The cone valve (6) is in sliding fit with the connector body (9).

4. A temperature dependent one-way restrictor according to claim 1, wherein: The reverse spring guide tube (5) is in sliding fit with the connector body (9).

5. A temperature dependent one-way restrictor according to claim 1, wherein: The spring positioning seat (2) has a through hole.

6. A temperature dependent one-way restrictor according to claim 1, wherein: A through hole is provided on the end face of the piston rod.

7. A temperature dependent one-way restrictor according to claim 1, wherein: The cone valve (6) has four evenly distributed first oil holes on its lower circumferential surface, and a second oil hole is provided at the middle of the lower end of the cone valve (6).

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