Automatic deflation device and control method for hydraulic system

Abstract

The present invention provides an automatic deflation device and control method for a hydraulic system, comprising a threaded joint fixed at the highest point of a pipe section, a connection seat provided on the threaded joint, a sliding guide rod provided between the connection seat and the threaded joint, a sliding float provided at the end of the guide rod, the float can slide against and seal at the bottom of the connection seat, a threaded adjustment bolt is provided on the connection seat, and a deflation port is provided on the adjustment bolt, so that the pipe section is connected to the atmosphere through the deflation port and the guide rod for deflation. The system pipeline oil filling process can realize the automatic discharge of gas in the pipeline, even if there is air infiltrated from the external pipeline, it can be automatically discharged by filling and discharging oil without manual operation; the gas is discharged during the oil filling process, and the design of the internal flow channel can prevent the hydraulic oil from leaking and polluting the working environment; even if the system cannot be interrupted, and there is indeed gas in the pipeline that cannot be automatically discharged, the present invention can still realize the function of manual emergency exhaust by manually screwing in the adjustment bolt.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic transmission, and in particular to an automatic air-release device for a hydraulic system and a control method thereof. Background Art

[0002] There is often a certain amount of air in the hydraulic system pipeline during the oil filling and discharging process, especially at the highest point of the pipeline space. The mixing of air often leads to poor system response characteristics, and the existence of cavitation and cavitation can cause damage to system components and affect the vibration and noise characteristics of the system. Therefore, the air in the system pipeline should be removed as much as possible. Nowadays, when designing hydraulic systems, several manual bleed needle valves are often set at the highest point of the pipeline space, but this type of bleed needle valve often has the following disadvantages:

[0003] 1. Because it is set at the highest point of the pipeline space, it is often difficult to operate and deflate;

[0004] 2. Deflation can only be achieved manually. Each time the system is filled or discharged, deflation must be performed manually, which is very inconvenient;

[0005] 3. Since the venting process is usually carried out after the system is filled with pressurized oil, it is easy for oil to leak and pollute the working environment. Summary of the invention

[0006] The main purpose of the present invention is to provide an automatic air release device and a control method for a hydraulic system to solve the problems in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: it includes a threaded joint fixed at the highest point of the pipe section, a connecting seat is provided on the threaded joint, a sliding guide rod is provided between the connecting seat and the threaded joint, a sliding float is provided at the end of the guide rod, the float can be slidably pressed against and sealed at the bottom of the connecting seat, an adjusting bolt with a threaded connection is provided on the connecting seat, and an air vent is provided on the adjusting bolt, so that the pipe section is connected to the atmosphere through the air vent and the guide rod for air venting.

[0008] In a preferred embodiment, the connecting seat is threadedly connected to the threaded joint, and a sealing gasket is provided between the connecting seat and the threaded joint.

[0009] In the preferred embodiment, a threaded hole is provided on the connection seat, the adjusting bolt is threadedly connected to the threaded hole, the air vent is an air outlet and an exhaust port, and the air outlet and the exhaust port are provided at both ends of the adjusting bolt.

[0010] In the preferred embodiment, the air outlet and the exhaust port penetrate the adjusting bolt in the radial direction, and the air outlet and the exhaust port are connected in the axial direction of the adjusting bolt;

[0011] When the adjusting bolt is rotated to seal the exhaust port at the threaded hole, the connection between the pipe section and the atmosphere is cut off;

[0012] When the adjusting bolt is rotated so that the exhaust port passes over the threaded hole, the pipe section is connected to the atmosphere.

[0013] In the preferred embodiment, an upper stop ring is provided at one end of the guide rod and a lower stop ring is provided at the other end. The upper stop ring is fixed in the connecting seat and the lower stop ring is fixed on the floating ball. The guide rod slides against the upper stop ring and the lower stop ring.

[0014] In the preferred embodiment, a through hole is provided in the middle of the guide rod, a plurality of grooves are provided around the guide rod, both ends of the grooves are blocked, and bumps are provided on both sides of the upper stop ring and the lower stop ring, and the bumps slide against the grooves.

[0015] In a preferred embodiment, the float is a hollow structure, a slide groove is provided in the end of the float, and the end of the guide rod slides against the slide groove.

[0016] In a preferred solution, the number of the grooves is greater than the number of the protrusions, so that the idle grooves are used for air circulation.

[0017] In a preferred embodiment, the adjusting bolt is coaxial with the guide rod, and the adjusting bolt is rotated so that the adjusting bolt pushes the guide rod to move.

[0018] The method is as follows: S1. When hydraulic oil begins to be introduced into the pipe section, the adjusting bolt is rotated so that the exhaust port passes over the threaded hole, thereby connecting the pipe section with the atmosphere;

[0019] S2. Hydraulic oil is continuously introduced, and the rising liquid level drives the float ball to float up along the guide rod until it floats to the bottom of the connecting seat, thereby cutting off the connection between the pipe section and the atmosphere;

[0020] S3. When there is high-pressure gas in the pipe section that cannot be discharged, the adjusting bolt is rotated to move the push rod, thereby driving the float to separate from the bottom of the connecting seat, thereby connecting the pipe section with the atmosphere for manual emergency exhaust;

[0021] S4. After the gas in the pipe section is discharged, the adjusting bolt can be rotated to seal the exhaust port at the threaded hole, thereby cutting off the connection between the pipe section and the atmosphere.

[0022] The present invention provides an automatic deflation device and control method for a hydraulic system, with the following beneficial effects:

[0023] 1. The oil filling process of the system pipeline can realize the automatic discharge of gas in the pipeline. Even if there is air infiltrated from the external pipeline, it can be automatically discharged by filling and discharging oil without manual operation;

[0024] 2. Gas is discharged during the oil filling process, and the design of the internal flow channel can prevent hydraulic oil from leaking out and polluting the working environment;

[0025] 3. Even if the system cannot be interrupted, and there is indeed gas in the pipeline that cannot be automatically discharged, the present invention can still realize the function of manual emergency exhaust by manually screwing in the adjustment bolt;

[0026] 4. The present invention adopts standard threaded joints, which have a high degree of modularization and good interchangeability. Threaded joints can be set at appropriate positions of system pipelines according to the actual situation of the system, so as to adapt and install the device described in the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0028] Figure 1 It is an exploded view of the overall structure of the present invention;

[0029] Figure 2 It is a front cross-sectional view of the automatic exhaust of the overall structure of the present invention;

[0030] Figure 3 It is a front cross-sectional view of the manual emergency exhaust of the overall structure of the present invention;

[0031] Figure 4 is a front cross-sectional view of the gas exhaust seal of the integral structure of the present invention;

[0032] Figure 5 It is a side view of the connecting shaft between the guide rod and the stop ring of the present invention;

[0033] Figure 6 This is an exploded view of the connection between the guide rod and the stop ring of the present invention;

[0034] In the figure: adjusting bolt 1; air outlet 101; exhaust port 102; connecting seat 2; threaded hole 201; sealing gasket 3; guide rod 4; groove 401; through hole 402; float 5; slide groove 501; threaded joint 6; upper stop ring 7; protrusion 701; pipe section 8; lower stop ring 9. DETAILED DESCRIPTION

[0035] Example 1

[0036] like Figures 1 to 6As shown, an automatic deflation device and control method for a hydraulic system include a threaded joint 6 fixed at the highest point of a pipe section 8, a connection seat 2 is provided on the threaded joint 6, a sliding guide rod 4 is provided between the connection seat 2 and the threaded joint 6, a sliding float 5 is provided at the end of the guide rod 4, the float 5 can slide against and seal at the bottom of the connection seat 2, an adjusting bolt 1 connected by thread is provided on the connection seat 2, and a deflation port is provided on the adjusting bolt 1, so that the pipe section 8 is connected to the atmosphere through the deflation port and the guide rod 4 for deflation. According to this structure, the threaded joint 6 is fixed at the highest point of the pipe section 8 by welding, so that the gas can be automatically discharged when it is filled with oil when it is collected at the highest point, and the oil filling liquid level rises so that the float 5 is guided to float up through the guide rod 4 until the float 5 is sealed against the bottom of the connection seat 2, thereby completing the automatic deflation; by rotating the adjusting bolt 1, the deflation port can be connected to the pipe section 8 and the atmosphere, or the connection between the pipe section 8 and the atmosphere can be cut off.

[0037] In the preferred embodiment, the connection seat 2 is threadedly connected to the threaded joint 6, and a sealing gasket 3 is provided between the connection seat 2 and the threaded joint 6. With this structure, the connection seat 2 is easy and convenient to install and remove, and the sealing gasket 3 ensures the sealing of the connection and avoids leakage of hydraulic oil.

[0038] In the preferred embodiment, the connection seat 2 is provided with a threaded hole 201, the adjusting bolt 1 is threadedly connected to the threaded hole 201, and the air vents are the air outlet 101 and the exhaust port 102, which are arranged at both ends of the adjusting bolt 1. With this structure, by rotating the adjusting bolt 1, the exhaust port 102 can enter the connection seat 2, thereby connecting the pipe section 8 with the atmosphere.

[0039] In the preferred embodiment, the air outlet 101 and the exhaust port 102 penetrate the adjusting bolt 1 in the radial direction, and the air outlet 101 and the exhaust port 102 are connected in the axial direction of the adjusting bolt 1;

[0040] When the adjusting bolt 1 is rotated to seal the exhaust port 102 at the threaded hole 201, the connection between the pipe section 8 and the atmosphere is cut off;

[0041] When the adjusting bolt 1 is rotated so that the exhaust port 102 passes over the threaded hole 201, the pipe section 8 is connected to the atmosphere. With this structure, the air outlet 101 and the exhaust port 102 are connected in the adjusting bolt 1 to form an "I" shape, so that by rotating the adjusting bolt 1, the exhaust port 102 can be blocked at the threaded hole 201 to cut off the connection between the pipe section 8 and the atmosphere, or the exhaust port 102 passes over the threaded hole 201 to connect the pipe section 8 with the atmosphere.

[0042] In the preferred embodiment, an upper stop ring 7 is provided at one end of the guide rod 4, and a lower stop ring 9 is provided at the other end, the upper stop ring 7 is fixed in the connecting seat 2, the lower stop ring 9 is fixed on the floating ball 5, and the guide rod 4 slides against the upper stop ring 7 and the lower stop ring 9. With this structure, the rising liquid level drives the floating ball 5 to float up, and the guide rod 4 can play a guiding role.

[0043] In the preferred embodiment, a through hole 402 is provided in the middle of the guide rod 4, and a plurality of grooves 401 are provided on the periphery of the guide rod 4, both ends of the grooves 401 are blocked, and protrusions 701 are provided on both sides of the inner part of the upper stop ring 7 and the lower stop ring 9, and the protrusions 701 slide against the grooves 401. With this structure, the guide rod 4 slides more smoothly, and the through hole 402 is used for air circulation.

[0044] In the preferred embodiment, the float 5 is a hollow structure, and a slide groove 501 is provided in the end of the float 5, and the end of the guide rod 4 slides against the slide groove 501. With this structure, the hollow structure of the float 5 ensures the buoyancy of the float 5, and the guide rod 4 can enter the bottom of the slide groove 501 during the floating process of the float 5, so that the float 5 abuts against the bottom of the connecting seat 2.

[0045] In the preferred embodiment, the number of grooves 401 is greater than the number of protrusions 701, so that the idle grooves 401 are used for air circulation. In this structure, there are four grooves 401, two protrusions 701 slide against the corresponding grooves 401, and the other two grooves 401 can be used for air circulation.

[0046] In the preferred embodiment, the adjusting bolt 1 is coaxial with the guide rod 4, and the adjusting bolt 1 is rotated to make the adjusting bolt 1 push the guide rod 4 to move. With this structure, when there is high-pressure gas in the pipe section 8, the adjusting bolt 1 is further rotated to push the guide rod 4 downward, thereby driving the float 5 to move downward so that the float 5 is separated from the connecting seat 2, thereby connecting the pipe section 8 and the atmosphere to release the high-pressure gas.

[0047] Example 2

[0048] like Figures 1 to 6 As shown, further explained in combination with Example 1: when hydraulic oil starts to be introduced into the pipe section 8, the adjusting bolt 1 is rotated to make the exhaust port 102 pass over the threaded hole 201, thereby connecting the pipe section 8 with the atmosphere; the hydraulic oil is continuously introduced, and the liquid level rises to drive the float 5 to float up along the guide rod 4 until it floats to the bottom of the connecting seat 2, thereby cutting off the connection between the pipe section 8 and the atmosphere; when there is high-pressure gas in the pipe section 8 that cannot be discharged, the adjusting bolt 1 is rotated to make the adjusting bolt 1 push the guide rod 4 to move, thereby driving the float 5 to break away from the bottom of the connecting seat 2, thereby connecting the pipe section 8 with the atmosphere, and performing manual emergency exhaust; when the gas in the pipe section 8 is discharged, the adjusting bolt 1 can be rotated to make the exhaust port 102 seal at the threaded hole 201, thereby cutting off the connection between the pipe section 8 and the atmosphere.

[0049] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An automatic air release device for a hydraulic system, characterized in that: The invention comprises a threaded joint (6) fixed at the highest point of a pipe section (8), a connecting seat (2) being provided on the threaded joint (6), a sliding guide rod (4) being provided between the connecting seat (2) and the threaded joint (6), a sliding float (5) being provided at the end of the guide rod (4), the float (5) being slidably pressed against and sealed at the bottom of the connecting seat (2), an adjusting bolt (1) being threadedly connected being provided on the connecting seat (2), an air vent being provided on the adjusting bolt (1), so that the pipe section (8) is connected to the atmosphere through the air vent and the guide rod (4) for air venting; A threaded hole (201) is provided on the connection seat (2), the adjusting bolt (1) is threadedly connected to the threaded hole (201), the air release port is an air outlet (101) and an exhaust port (102), and the air outlet (101) and the exhaust port (102) are provided at two ends of the adjusting bolt (1); The air outlet (101) and the exhaust port (102) penetrate the adjusting bolt (1) in a radial direction, and the air outlet (101) and the exhaust port (102) are connected in the axial direction of the adjusting bolt (1); When the adjusting bolt (1) is rotated so that the exhaust port (102) is sealed at the threaded hole (201), the connection between the pipe section (8) and the atmosphere is cut off; When the adjusting bolt (1) is rotated so that the exhaust port (102) passes over the threaded hole (201), the pipe section (8) is connected to the atmosphere; An upper stop ring (7) is provided at one end of the guide rod (4), and a lower stop ring (9) is provided at the other end, the upper stop ring (7) is fixed in the connecting seat (2), the lower stop ring (9) is fixed on the floating ball (5), and the guide rod (4) slides against the upper stop ring (7) and the lower stop ring (9); A through hole (402) is provided in the middle of the guide rod (4), a plurality of grooves (401) are provided on the circumference of the guide rod (4), both ends of the grooves (401) are blocked, and protrusions (701) are provided on both sides of the interior of the upper stop ring (7) and the lower stop ring (9), and the protrusions (701) abut against and slide in the grooves (401); The float (5) is a hollow structure, and a slide groove (501) is provided in the end of the float (5), and the end of the guide rod (4) slides against the slide groove (501); The adjusting bolt (1) and the guide rod (4) are coaxial, and the adjusting bolt (1) is rotated so that the adjusting bolt (1) pushes the guide rod (4) to move.

2. According to claim 1, an automatic air release device for a hydraulic system, characterized in that: The connection seat (2) is threadedly connected to the threaded joint (6), and a sealing gasket (3) is provided between the connection seat (2) and the threaded joint (6).

3. According to claim 1, the automatic air release device for a hydraulic system is characterized by: The number of the grooves (401) is greater than the number of the protrusions (701), so that the idle grooves (401) are used for air circulation.

4. A control method for an automatic air bleed device for a hydraulic system according to any one of claims 1 to 3, wherein the method comprises: S1, when hydraulic oil begins to be introduced into the pipe section (8), rotating the adjusting bolt (1) so that the air outlet (102) passes over the threaded hole (201), thereby connecting the pipe section (8) with the atmosphere; S2, hydraulic oil is continuously introduced, and the rising liquid level drives the float (5) to float up along the guide rod (4) until it floats to the bottom of the connecting seat (2), thereby cutting off the connection between the pipe section (8) and the atmosphere; S3. When high-pressure gas exists in the pipe section (8) and cannot be discharged, the adjusting bolt (1) is rotated to cause the adjusting bolt (1) to push the guide rod (4) to move, thereby driving the float (5) to separate from the bottom of the connecting seat (2), thereby connecting the pipe section (8) with the atmosphere and performing manual emergency exhaust; S4. After the gas in the pipe section (8) is exhausted, the adjusting bolt (1) can be rotated to seal the exhaust port (102) at the threaded hole (201), thereby cutting off the connection between the pipe section (8) and the atmosphere.

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