Overflow valve with exhaust function

Abstract

The utility model relates to the technical field of overflow valves, in particular to an overflow valve with an exhaust function, which comprises an overflow valve body, an overflow cavity, an exhaust cavity, a connecting pipe, a pressure relief pipe, a partition plate, a first sealing ring and a plug rod, the left end of the plug rod is connected with a pressure relief plate, and the right end of the plug rod extends into a force application cavity to be connected with a pressure relief spring. The outer edge of the pressure relief plate is connected with the inner wall of the pressure relief cavity in a sliding mode through a second sealing ring, a connecting pipe and a pressure relief pipe are connected between the pressure relief cavity and the exhaust cavity, a plurality of through holes are formed in the pressure relief plate, a liquid inlet is formed in one side of the pressure relief cavity, a liquid drainage pipe is arranged at the bottom of the exhaust cavity, and a liquid outlet is formed in the other side of the exhaust cavity. An air leakage mechanism is arranged at the top of the exhaust cavity, and an air outlet pipe is arranged on one side of the exhaust cavity; according to the overflow valve, bubbles contained in hydraulic oil can be effectively removed, the faults of noise and vibration of the overflow valve due to the bubbles are avoided, the stability of a hydraulic system is guaranteed, and meanwhile the service life of the overflow valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of overflow valves, in particular to an overflow valve with an exhaust function. Background Art

[0002] The overflow valve is a hydraulic pressure control valve that mainly plays the role of constant pressure overflow, pressure stabilization, system unloading and safety protection in hydraulic equipment. The overflow valve has many fault manifestations during use, and the majority of faults are noise and vibration. The main reason is that it is caused by uneven pressure.

[0003] There are many reasons for the uneven pressure of the hydraulic oil in the overflow valve. Bubbles in the hydraulic oil are one of the reasons for the uneven pressure in the hydraulic system. The hydraulic oil contains a lot of gas, which causes uneven hydraulic oil pressure in the overflow valve, and then causes noise and vibration failures in the overflow valve, affecting the stability of the hydraulic system and the service life of the overflow valve. Utility Model Content

[0004] The purpose of the utility model is to provide a relief valve with exhaust function in view of the above-mentioned deficiencies, which can effectively remove bubbles contained in the hydraulic oil, avoid noise and vibration failures of the relief valve, ensure the stability of the hydraulic system, and also extend the service life of the relief valve.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The venting chamber is provided with a venting mechanism, and the venting mechanism is provided with a venting mechanism, and the venting mechanism is provided with a venting mechanism, and the venting mechanism is provided with a venting mechanism, and the venting mechanism is provided with a venting mechanism.

[0007] Furthermore, the bottom ends of the connecting pipe and the pressure relief pipe are both arranged close to the bottom of the exhaust chamber.

[0008] Furthermore, a filter screen is horizontally arranged in the exhaust cavity, the filter screen is arranged close to the top end of the exhaust cavity, and a plurality of filter holes are arranged on the filter screen.

[0009] Furthermore, a plurality of puncture needles are arranged at the bottom of the filter screen, and the puncture needles are arranged staggered with the filter holes.

[0010] Furthermore, a downwardly opening air-release blind hole is provided at the top of the exhaust chamber, one end of the air outlet pipe is connected to the middle of the air-release blind hole, an arc-shaped valve plate is provided at the bottom opening of the air-release blind hole, and a valve hole is provided at the bottom center of the arc-shaped valve plate; the air-release mechanism includes a valve ball, a telescopic rod used to connect the top end of the air-release blind hole and the valve ball, and an air-release spring mounted on the telescopic rod, wherein both ends of the air-release spring are respectively connected to the valve ball and the top end of the air-release blind hole.

[0011] The beneficial effects of the utility model are:

[0012] When the cam is in operation, the hydraulic oil will not move upwards, and the pressure relief spring will be compressed. ... BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a cross-sectional view of the utility model;

[0015] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0016] Figure numerals: relief valve body 1; pressure relief chamber 111; force chamber 112; exhaust chamber 12; air relief blind hole 121; arc-shaped valve plate 122; valve hole 1221; connecting pipe 13; pressure relief pipe 14; partition 15; liquid inlet 16; liquid discharge pipe 17; air outlet pipe 18; plug rod 2; pressure relief plate 3; sealing ring 2 31; through hole 32; pressure relief spring 4; filter screen 5; filter hole 51; puncture needle 52; valve ball 61; telescopic rod 62; air relief spring 63. DETAILED DESCRIPTION

[0017] like Figure 1 , Figure 2 and Figure 3As shown, a relief valve with exhaust function includes a relief valve body 1, an overflow chamber arranged in the relief valve body 1, an exhaust chamber 12 arranged below the overflow chamber, a connecting pipe 13 and a pressure relief pipe 14 for connecting the overflow chamber and the exhaust chamber 12, a partition 15 is fixed in the overflow chamber, and the partition 15 divides the overflow chamber into a pressure relief chamber 111 and a force chamber 112 from left to right, a plug rod 2 is slidably connected to the middle part of the partition 15 through a sealing ring 151, and a pressure relief plate 3 is connected to the left end of the plug rod 2. The right end of the plug rod 2 extends into the force-applying chamber 112 and is connected to a pressure relief spring 4. The outer edge of the pressure relief plate 3 is slidably connected to the inner wall of the pressure relief chamber 111 through a sealing ring 31. A connecting pipe 13 and a pressure relief pipe 14 are connected between the pressure relief chamber 111 and the exhaust chamber 12. A plurality of through holes 32 are provided on the pressure relief plate 3. A liquid inlet 16 is provided on one side of the pressure relief chamber 111. A liquid drain pipe 17 is provided at the bottom of the exhaust chamber 12. A degassing mechanism is provided on the top of the exhaust chamber 12. An exhaust pipe 18 is provided on one side of the exhaust chamber.

[0018] When in use, when the pressure relief spring 4 is not accepted, the pressure relief plate 3 and the sealing ring 31 block the pressure relief pipe 14, and the hydraulic oil enters the pressure relief chamber 111 from the liquid inlet 16. After the hydraulic oil passes through the through hole 32, it enters the exhaust chamber 12 from the connecting pipe 13 at the bottom of the pressure relief chamber 111, and is then discharged from the drain pipe 17; when there are bubbles in the hydraulic oil and the pressure is too high, the hydraulic oil pushes the pressure relief plate 3 to move right along the pressure relief chamber 111, and the plug rod 2 moves right to push the pressure relief spring 4 to be compressed, exposing the inlet of the pressure relief pipe 14, and the hydraulic oil can not only pass through the through hole 32 and enter the exhaust chamber 12 from the connecting pipe 13, but also enter the exhaust chamber 12 through the pressure relief pipe 14, and the excess bubbles in the hydraulic oil are discharged through the deflation mechanism and the outlet pipe 18, and the hydraulic oil is discharged from the drain pipe 17; the utility model can effectively remove bubbles contained in the hydraulic oil, avoid the failure of the overflow valve due to noise and vibration caused by bubbles, ensure the stability of the hydraulic system, and also extend the service life of the overflow valve.

[0019] like Figure 1 , Figure 2 and Figure 3 As shown, the bottom ends of the connecting pipe 13 and the pressure relief pipe 14 are both arranged close to the bottom of the exhaust chamber 12; in this embodiment, when the bottom ends of the connecting pipe 13 and the pressure relief pipe 14 are both arranged close to the bottom of the exhaust chamber 12, the air in the bubbles can rise in the exhaust chamber 12 after entering the exhaust chamber 12, while the hydraulic oil always remains at the bottom of the exhaust chamber 12 under the action of gravity.

[0020] like Figure 1 , Figure 2 and Figure 3As shown, a filter screen 5 is horizontally arranged in the exhaust chamber 12, and the filter screen 5 is arranged close to the top end of the exhaust chamber 12. A plurality of filter holes 51 are arranged on the filter screen 5. In this embodiment, the filter holes 51 can further prevent the hydraulic oil from being discharged from the exhaust pipe 18.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, a plurality of puncture needles 52 are arranged at the bottom of the filter 5, and the puncture needles 52 are staggered with the filter holes 51; in this embodiment, when the liquid level and air pressure in the exhaust chamber 12 gradually increase, the bubbles in the hydraulic oil can be punctured by the puncture needles 52, so that the air in the bubbles can be more easily discharged through the filter 5.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, a downwardly opening air-release blind hole 121 is provided at the top of the exhaust chamber 12, one end of the air outlet pipe 18 is connected to the middle of the air-release blind hole 121, a circular arc valve plate 122 is provided at the bottom opening of the air-release blind hole 121, and a valve hole 1221 is provided at the bottom center of the circular arc valve plate 122; the air-release mechanism includes a valve ball 61 for connecting the top of the air-release blind hole 121 and a telescopic rod 62 adopted by the valve ball 61, and an air-release spring 63 sleeved on the telescopic rod 62, and the two ends of the air-release spring 63 are respectively connected to the valve ball 61 and the top of the air-release blind hole 121; in this embodiment, when the hydraulic pressure in the oil circuit is normal, the air-release spring 63 is not subjected to force, and the valve ball 61 blocks the valve hole 1221; when the hydraulic pressure in the oil circuit increases, the air-release spring 63 is compressed, the valve ball 61 moves upward, and the gas passes through the valve hole 1221 into the air-release blind hole 121 and is discharged from the air outlet pipe 18.

[0023] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the scope defined by the spirit of the present invention.

Claims

1. A relief valve with exhaust function, characterized in that: The invention comprises a relief valve body (1), an overflow chamber arranged in the relief valve body (1), an exhaust chamber (12) arranged below the overflow chamber, a connecting pipe (13) and a pressure relief pipe (14) for connecting the overflow chamber and the exhaust chamber (12), a partition (15) being fixed in the overflow chamber, the partition (15) dividing the overflow chamber into a pressure relief chamber (111) and a force application chamber (112) from left to right, a plug rod (2) being slidably connected to the middle part of the partition (15) via a sealing ring (151), the left end of the plug rod (2) being connected to a pressure relief plate (3), and the right end of the plug rod (2) extending into a pressure relief plate (3). The force-applying chamber (112) is connected to a pressure relief spring (4); the outer edge of the pressure relief plate (3) is slidably connected to the inner wall of the pressure relief chamber (111) via a second sealing ring (31); a connecting pipe (13) and a pressure relief pipe (14) are connected between the pressure relief chamber (111) and the exhaust chamber (12); a plurality of through holes (32) are provided on the pressure relief plate (3); a liquid inlet (16) is provided on one side of the pressure relief chamber (111); a liquid discharge pipe (17) is provided at the bottom of the exhaust chamber (12); a degassing mechanism is provided at the top of the exhaust chamber (12); and an exhaust pipe (18) is provided on one side of the exhaust chamber.

2. A relief valve with exhaust function according to claim 1, characterized in that: The bottom ends of the connecting pipe (13) and the pressure relief pipe (14) are both arranged close to the bottom of the exhaust chamber (12).

3. A relief valve with exhaust function according to claim 2, characterized in that: A filter screen (5) is horizontally arranged in the exhaust cavity (12); the filter screen (5) is arranged close to the top end of the exhaust cavity (12); and a plurality of filter holes (51) are arranged on the filter screen (5).

4. The overflow valve with exhaust function according to claim 3, characterized in that: A plurality of puncturing needles (52) are arranged at the bottom of the filter net (5), and the puncturing needles (52) and the filter holes (51) are arranged in a staggered manner.

5. The overflow valve with exhaust function according to claim 1, characterized in that: A downwardly opening air leakage blind hole (121) is arranged at the top of the exhaust cavity (12); one end of the air outlet pipe (18) is connected to the middle of the air leakage blind hole (121); a circular arc valve plate (122) is arranged at the bottom opening of the air leakage blind hole (121); a valve hole (1221) is arranged at the bottom center of the circular arc valve plate (122); the air leakage mechanism comprises a valve ball (61) for connecting the top end of the air leakage blind hole (121) and a telescopic rod (62) used by the valve ball (61); and an air leakage spring (63) sleeved on the telescopic rod (62); the two ends of the air leakage spring (63) are respectively connected to the valve ball (61) and the top end of the air leakage blind hole (121).

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