Hydraulic oil line venting device

Abstract

The utility model discloses a hydraulic oil pipeline exhaust device, including gas collecting pipe (1), the top of gas collecting pipe (1) is connected with gas collecting box (2), the top of gas collecting box (2) is connected with gas outlet valve (3), and the lower extreme of gas outlet valve (3) is connected with exhaust valve, exhaust valve includes valve seat (4), crank (5) and float (6), the middle part of valve seat (4) forms first gas passage (7), and one end of first gas passage (7) is communicated gas outlet valve (3), and the other end of first gas passage (7) is communicated gas collecting box (2) through first exhaust port (8), float (6) is located in gas collecting box (2) and drive connection crank (5), one side swing joint valve seat (4) of crank (5), and the other side of crank (5) is equipped with the sealing part of the first exhaust port (8) outside. The utility model can realize the automatic exhaust of hydraulic oil pipeline, and has the characteristics of good exhaust effect.

Description

Technical Field

[0001] This utility model relates to hydraulic systems, and in particular to a hydraulic oil pipeline venting device. Background Technology

[0002] During operation, the hydraulic system of a hydroelectric power station is affected by factors such as pump suction, dissolved air release, and aging and failure of seals, resulting in a certain amount of air mixing into the hydraulic oil. This air forms bubbles in the hydraulic oil, causing fluctuations in pressure and flow, leading to unstable actuator movements, reduced system control accuracy, and decreased response speed. Furthermore, these bubbles can rapidly burst in high-pressure areas, creating localized vacuums that cause dissolved gases in the oil to precipitate, forming more bubbles and corroding metal surfaces, thus shortening component lifespan.

[0003] To address the aforementioned issues, current hydropower stations use quick-connect couplings to bleed the hydraulic system. Specifically, after connecting the quick-connect coupling to the hydraulic lines, air is released by pressing or rotating the vent valve on the coupling until no air bubbles remain for an extended period before closing. However, this bleed method has drawbacks. Firstly, operators need to frequently operate the quick-connect coupling during the bleed process, increasing the complexity and time cost. Secondly, the quick-connect coupling is only suitable for low-pressure hydraulic systems and cannot withstand the pressure of high-pressure systems, thus reducing the bleeding effect and versatility of the hydraulic lines. Furthermore, the frequent opening and closing of the quick-connect coupling can easily introduce dust, dirt, and other contaminants into the hydraulic system, reducing its cleanliness and operational stability.

[0004] Therefore, the existing methods for venting hydraulic systems in hydropower stations suffer from problems such as large workload and poor venting effect. Utility Model Content

[0005] The purpose of this invention is to provide a hydraulic oil pipeline venting device. It can automatically vent hydraulic oil pipelines and has the characteristic of good venting effect.

[0006] The technical solution of this utility model: a hydraulic oil pipeline venting device, including a gas collection pipe, a gas collection box connected to the top of the gas collection pipe, a gas outlet valve connected to the top of the gas collection box, and an exhaust valve connected to the lower end of the gas outlet valve; the exhaust valve includes a valve seat, a crank, and a float, a first air passage is formed in the middle of the valve seat, one end of the first air passage is connected to the gas outlet valve, and the other end of the first air passage is connected to the gas collection box through a first exhaust port, the float is located in the gas collection box and is connected to the crank in a transmission manner, one side of the crank is rotatably connected to the valve seat, and the other side of the crank is provided with a sealing part located outside the first exhaust port;

[0007] The gas collection box is used to collect gas in the hydraulic oil pipeline;

[0008] The float is used to rise and fall with the liquid level in the gas collecting box and drive the crank to rotate.

[0009] The sealing part is used to open and close the first exhaust port as the crank rotates;

[0010] The vent valve is used to discharge the gas in the gas collection box to the outside after the sealing part is opened.

[0011] In the aforementioned hydraulic oil pipeline venting device, the float and the crank are connected to each other via a connecting rod, with both ends of the connecting rod rotatably connected to the float and the crank, respectively.

[0012] In the aforementioned hydraulic oil pipeline venting device, both ends of the gas collection pipe are detachably connected to the hydraulic oil pipeline, and the middle part of the gas collection pipe is bent upward and connected to the gas collection box.

[0013] In the aforementioned hydraulic oil pipeline venting device, a valve body is threadedly connected to one side of the valve seat, the first vent is located on the valve body, and the outer end of the valve body forms a sealing surface for the mating sealing part.

[0014] In the aforementioned hydraulic oil pipeline venting device, the top of the valve seat is detachably connected to an air outlet valve, the bottom of the valve seat is provided with a guide rod, and the middle part of the float is slidably connected to the guide rod.

[0015] In the aforementioned hydraulic oil pipeline venting device, the upper end of the vent valve is located outside the air collection box and has an air outlet. The lower end of the vent valve extends into the air collection box and is threadedly connected to the valve seat. The middle part of the vent valve has a second air passage that connects to the first air passage. The middle part of the second air passage has a sealing assembly that connects to the vent valve.

[0016] In the aforementioned hydraulic oil pipeline venting device, the second air passage forms a second vent at one end near the vent valve. The sealing assembly includes a clamping nut detachably connected to the vent valve. A valve stem is threadedly connected to the middle of the clamping nut. One end of the valve stem extends to one side of the second vent and is provided with a pressure block for sealing the second vent. The other end of the valve stem extends to the outside of the clamping nut and is connected to a handwheel.

[0017] In the aforementioned hydraulic oil pipeline venting device, the clamping nut is threadedly connected to the top of the vent valve, and a spacer cavity for venting is formed between the clamping nut and the vent valve, with the pressure block located inside the spacer cavity.

[0018] In the aforementioned hydraulic oil pipeline venting device, the air collection box includes a split upper air collection box and a lower air collection box. The upper air collection box and the lower air collection box are connected to each other around their perimeter by flanges, and a sealing ring is provided at the joint between the upper air collection box and the lower air collection box.

[0019] Compared with the prior art, this utility model has the following characteristics:

[0020] (1) Through the structural cooperation of the air collection box, the exhaust valve and the air outlet valve, the air in the hydraulic oil will be affected by buoyancy and enter the air collection box during the flow process, which will cause the liquid level in the air collection box to drop; after the liquid level in the air collection box drops, it will drive the float to move down, and the float will drive the crank to rotate and open the first exhaust port, so that the air in the air collection box can be discharged outward through the exhaust valve and the air outlet valve under the action of hydraulic pressure, thus realizing the exhaust function; when the air in the air collection box is partially discharged, the liquid level rises and drives the crank to close the first exhaust port again; with the above cooperation, this application can realize automatic exhaust of hydraulic oil pipeline and is applicable to high pressure hydraulic system;

[0021] (2) By limiting the structure of the exhaust valve, the operator can also open and close the exhaust valve by rotating the valve stem, thereby realizing the manual control of the exhaust function of this utility model and improving the functionality of this utility model.

[0022] Therefore, this utility model can realize automatic venting of hydraulic oil pipelines and has the characteristic of good venting effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 yes Figure 1 A magnified view from direction A;

[0025] Figure 3 yes Figure 1 A magnified view from direction B.

[0026] The labels in the attached diagram are as follows: 1-Gas collection pipe, 2-Gas collection box, 3-Outlet valve, 4-Valve seat, 5-Crank, 6-Float, 7-First air passage, 8-First exhaust port, 9-Connecting rod, 10-Valve body, 11-Guide rod, 12-Outlet, 13-Second air passage, 14-Second exhaust port, 15-Pressure nut, 16-Valve stem, 201-Upper gas collection box, 202-Lower gas collection box, 161-Pressure block, 162-Handwheel. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0028] Example. Hydraulic oil line venting device, configured as follows: Figure 1As shown, it includes a gas collection pipe 1, a gas collection box 2 connected to the top of the gas collection pipe 1, an exhaust valve 3 connected to the top of the gas collection box 2, and an exhaust valve connected to the lower end of the exhaust valve 3; the exhaust valve includes a valve seat 4, a crank 5, and a float 6, a first air passage 7 is formed in the middle of the valve seat 4, one end of the first air passage 7 is connected to the exhaust valve 3, and the other end of the first air passage 7 is connected to the gas collection box 2 through a first exhaust port 8, the float 6 is located inside the gas collection box 2 and is pulsatorically connected to the crank 5, one side of the crank 5 is rotatably connected to the valve seat 4, and the other side of the crank 5 is provided with a sealing part located outside the first exhaust port 8;

[0029] The gas collection box 2 is used to collect gas in the hydraulic oil pipeline;

[0030] The float 6 is used to rise and fall with the liquid level in the gas collecting box 2 and drive the crank 5 to rotate.

[0031] The sealing part is used to open and close the first exhaust port 8 as the crank 5 rotates;

[0032] The vent valve 3 is used to discharge the gas in the gas collection box 2 to the outside after the sealing part is opened.

[0033] The float 6 and the crank 5 are connected to each other via a connecting rod 9, with both ends of the connecting rod 9 rotatably connected to the float 6 and the crank 5, respectively.

[0034] The two ends of the gas collection pipe 1 are detachably connected to hydraulic oil lines, and the middle part of the gas collection pipe 1 is bent upward and connected to the gas collection box 2.

[0035] The valve seat 4 is threadedly connected to the valve body 10 on one side, the first exhaust port 8 is provided on the valve body 10, and the outer end of the valve body 10 forms a sealing surface for the mating sealing part.

[0036] The top of the valve seat 4 is detachably connected to the air outlet valve 3, and the bottom of the valve seat 4 is provided with a guide rod 11 vertically installed in the air collection box 2. The middle part of the float 6 is slidably connected to the guide rod 11.

[0037] The upper end of the air outlet valve 3 is located outside the air collection box 2 and has an air outlet 12. The lower end of the air outlet valve 3 extends into the air collection box 2 and is threadedly connected to the valve seat 4. The air outlet valve 3 and the valve seat 4 are fixed to the top of the air collection box 2 by threaded connection. The middle part of the air outlet valve 3 is provided with a second air passage 13 that connects to the first air passage 7. The middle part of the second air passage 13 is provided with a sealing assembly that connects to the air outlet valve 3.

[0038] The second air passage 13 forms a second exhaust port 14 near the exhaust valve. The sealing assembly includes a compression nut 15 connected inside the exhaust valve 3. A sealing ring is provided between the exhaust valve 3 and the compression nut 15 for sealing. A gap is formed between the compression nut 15 and the exhaust valve for gas to pass through. A valve stem 16 is threadedly connected to the middle of the compression nut 15. One end of the valve stem 16 extends to one side of the second exhaust port 14 and is provided with a pressure block 161 for sealing the second exhaust port 14. The pressure block 161 has a conical cross-sectional shape. The other end of the valve stem 16 extends to the outside of the compression nut 15 and is connected to a handwheel 162.

[0039] The clamping nut 15 is threaded to the top of the air outlet valve 3, and an air outlet valve 3 forms a spacer cavity for exhaust. The middle part of the pressure block 161 and the second air passage 13 are both located in the spacer cavity.

[0040] The gas collection box 2 includes a split upper gas collection box 201 and a lower gas collection box 202. The upper gas collection box 201 and the lower gas collection box 202 are bolted together around their perimeters via flanges. A sealing ring is provided at the joint between the upper gas collection box 201 and the lower gas collection box 202. A round hole for the valve seat 4 to pass through is provided in the middle of the upper gas collection box 201.

[0041] In this embodiment, during use, the hydraulic oil in the hydraulic oil line flows through the gas collection pipe 1, causing the gas in the hydraulic oil to enter the upper gas collection box 2 under the action of buoyancy. After the gas enters the gas collection box 2, it causes the liquid level in the gas collection box 2 to drop, causing the float 6 to slide downward along the guide rod 11 as the liquid level drops. During the downward sliding process, the float 6 drives the crank 5 to rotate via the connecting rod 9, causing the crank 5 to separate from the valve body 10 and release the blockage on the first exhaust port 8, allowing the air in the gas collection box 2 to communicate with the outside air through the first air passage 7 and the second air passage 13. In this state, the air in the gas collection box 2 will be discharged to the outside through the first air passage 7 and the second air passage 13 under the pressure of the hydraulic oil, realizing the exhaust function.

[0042] After the air in the air collection box 2 is discharged, the liquid level rises accordingly, which in turn drives the float 6 to rise again and drives the crank 5 to rotate until it is in contact with the valve body 10, thereby restoring the closure of the first exhaust port 8. With the above coordination, this embodiment can realize automatic venting of air from the hydraulic pipeline and effectively prevent hydraulic oil from overflowing from the exhaust port, ensuring its venting stability. On this basis, the operator can also open and close the air outlet valve 3 by turning the handwheel 162. That is, when the pressure block 161 moves to engage with the second exhaust port 14, the second air passage 13 is blocked and the air in the air collection box 2 cannot be discharged smoothly; when the pressure block 161 moves to separate from the second exhaust port 14, the second air passage 13 is unblocked and can realize the venting function, thereby facilitating the operator's control.

Claims

1. A hydraulic oil pipeline venting device, characterized in that: It includes a gas collection pipe (1), a gas collection box (2) connected to the top of the gas collection pipe (1), an exhaust valve (3) connected to the top of the gas collection box (2), and an exhaust valve connected to the lower end of the exhaust valve (3); the exhaust valve includes a valve seat (4), a crank (5) and a float (6), a first air passage (7) is formed in the middle of the valve seat (4), one end of the first air passage (7) is connected to the exhaust valve (3), and the other end of the first air passage (7) is connected to the gas collection box (2) through a first exhaust port (8). The float (6) is located inside the gas collection box (2) and is connected to the crank (5) in a transmission manner. One side of the crank (5) is rotatably connected to the valve seat (4), and the other side of the crank (5) is provided with a sealing part located outside the first exhaust port (8); The gas collection box (2) is used to collect gas in the hydraulic oil pipeline; The float (6) is used to rise and fall with the liquid level in the gas collecting box (2) and drive the crank (5) to rotate; The sealing part is used to open and close the first exhaust port (8) as the crank (5) rotates; The vent valve (3) is used to discharge the gas in the gas collection box (2) to the outside after the sealing part is opened.

2. The hydraulic oil pipeline venting device according to claim 1, characterized in that: The float (6) and the crank (5) are connected to each other by a connecting rod (9), and the two ends of the connecting rod (9) are rotatably connected to the float (6) and the crank (5) respectively.

3. The hydraulic oil pipeline venting device according to claim 1, characterized in that: The gas collection pipe (1) is detachably connected to hydraulic oil lines at both ends, and the middle part of the gas collection pipe (1) is bent upward and connected to the gas collection box (2).

4. The hydraulic oil pipeline venting device according to claim 1, characterized in that: The valve seat (4) is threaded to one side of the valve body (10), the first exhaust port (8) is provided on the valve body (10), and the outer end of the valve body (10) forms a sealing surface of the mating sealing part.

5. The hydraulic oil pipeline venting device according to claim 1, characterized in that: The valve seat (4) is detachably connected to the air outlet valve (3) at the top, and the bottom of the valve seat (4) is provided with a guide rod (11). The middle part of the float (6) is slidably connected to the guide rod (11).

6. The hydraulic oil pipeline venting device according to claim 5, characterized in that: The upper end of the air outlet valve (3) is located outside the air collection box (2) and has an air outlet (12). The lower end of the air outlet valve (3) extends into the air collection box (2) and is threadedly connected to the valve seat (4). The middle part of the air outlet valve (3) has a second air passage (13) that connects to the first air passage (7). The middle part of the second air passage (13) has a sealing assembly that connects to the air outlet valve (3).

7. The hydraulic oil pipeline venting device according to claim 6, characterized in that: The second air passage (13) forms a second exhaust port (14) near the exhaust valve. The sealing assembly includes a clamping nut (15) detachably connected to the exhaust valve (3). A valve stem (16) is threadedly connected to the middle of the clamping nut (15). One end of the valve stem (16) extends to one side of the second exhaust port (14) and is provided with a pressure block (161) for sealing the second exhaust port (14). The other end of the valve stem (16) extends to the outside of the clamping nut (15) and is connected to a handwheel (162).

8. The hydraulic oil pipeline venting device according to claim 7, characterized in that: The clamping nut (15) is threaded onto the top of the vent valve (3), and a spacer cavity for venting is formed between the clamping nut (15) and the vent valve (3), and the pressure block (161) is located in the spacer cavity.

9. The hydraulic oil pipeline venting device according to claim 1, characterized in that: The gas collection box (2) includes a split upper gas collection box (201) and a lower gas collection box (202). The upper gas collection box (201) and the lower gas collection box (202) are connected to each other around their perimeter by flanges. A sealing ring is provided at the joint between the upper gas collection box (201) and the lower gas collection box (202).

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