Novel exhaust valve

Abstract

The utility model discloses a novel exhaust valve which comprises a valve body, an upper cover is installed on the valve body, an ejector rod is movably arranged in an inner cavity formed by the valve body and the upper cover, an exhaust chamber is further arranged in the valve body and located below the inner cavity, and the upper end of the exhaust chamber is communicated with the inner cavity through a tightening section channel. Exhaust gaps are reserved between the left and right extension parts of the upper cover and the upper surface of the valve body, and an exhaust channel group is arranged in the upper cover; the labyrinth type exhaust channel group structure in the upper cover not only can ensure exhaust, but also can prevent external rainwater and dirt from entering the valve body.

Description

Technical Field

[0001] The utility model relates to the technical field of supporting component structures of hydraulic cylinders, in particular to a novel exhaust valve which is installed on a sealing gland of the hydraulic cylinder. Background Art

[0002] Hydraulic cylinders currently use ceramic piston rods, and the matching stroke detection device is a ceramic rod sensor, which is installed on the outer circle of the sealing cover of the hydraulic cylinder, and the detection surface is close to the outer surface of the piston rod. Due to its design principle, the pressure resistance of this sensor is very limited, generally not more than 3bar. When the piston rod moves, it will cause air flow disturbance, resulting in increased air pressure, which is very easy to damage such sensors. Therefore, it is necessary to install an exhaust valve on the sealing cover with an opening pressure of less than 1bar to ensure the safety of the sensor. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a

[0004] The technical solution adopted by the utility model to solve the technical problem is: a new exhaust valve, including a valve body, an upper cover is installed on the valve body, a push rod is movably arranged in the inner cavity formed by the valve body and the upper cover, an exhaust chamber is also arranged in the valve body below the inner cavity, and the upper end of the exhaust chamber is connected with the inner cavity through a tightening section channel;

[0005] An exhaust gap is left between the left and right extended parts of the upper cover and the upper surface of the valve body, and an exhaust channel group is arranged inside the upper cover;

[0006] The exhaust channel group includes a transverse channel arranged on the upper inner side of the upper cover and longitudinal channels arranged on the left and right sides of the transverse channel. The transverse channel is connected to the inner cavity, and the lower end of the longitudinal channel is connected to the exhaust gap.

[0007] By adopting the above technical solution, the labyrinth-like exhaust channel group structure in the upper cover can not only ensure exhaust, but also prevent external rainwater and dirt from entering the interior of the valve body.

[0008] Furthermore, the push rod described in the utility model is a cross-shaped structure, and the push rod is movably connected to the upper cover through a spring. The lower end of the push rod extends into the tightening section channel, and the tightening section channel is sealed when there is no pressure by arranging an O-ring.

[0009] By adopting the above technical solution, when the piston rod moves to generate air pressure inside the sealing cover and enters the exhaust chamber, the air pressure acts on the end surface of the lower end of the push rod. When the pressure generated by the air pressure is greater than the pressure applied by the spring, the push rod opens and the gas overflows.

[0010] Furthermore, the valve body of the utility model is provided with an outwardly expanded mounting edge, and a sealing ring is provided at the bottom of the outwardly expanded mounting edge to ensure the seal between the valve body and the sealing gland.

[0011] Furthermore, the bottom of the valve body described in the utility model is provided with an external thread on the outer wall of the exhaust chamber, so as to facilitate the valve body to be screwed onto the reserved threaded hole on the outer circle of the sealing gland.

[0012] The beneficial effect of the utility model is that the sealing cover of the new exhaust valve hydraulic cylinder of the utility model not only reduces the compressive strength of the sensor and protects the sensor, but also has a simple and ingenious structure and can be opened in one direction. Together with the labyrinth-type combined channel structure in the upper cover, it can ensure exhaust and prevent external rainwater and dirt from entering the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Numbers in the figure: 1. valve body, 2. upper cover, 3. inner cavity, 4. push rod, 5. exhaust chamber, 6. tightening section channel, 7. exhaust gap, 8. transverse channel, 9. longitudinal channel, 10. spring, 11. O-ring, 12. sealing ring, 13. external thread. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] like Figure 1A new type of exhaust valve shown in the figure comprises a valve body 1, an upper cover 2 is installed on the valve body 1, a push rod 4 is movably arranged in an inner cavity 3 formed by the valve body 1 and the upper cover 2, an exhaust chamber 5 is also arranged in the valve body 1 below the inner cavity 3, and the upper end of the exhaust chamber 5 is connected with the inner cavity 3 through a tightening section channel 6; an exhaust gap 7 is left between the left and right extended parts of the upper cover 2 and the upper surface of the valve body 1, and an exhaust channel group is arranged in the upper cover 2; the exhaust channel group comprises a transverse channel 8 arranged on the upper side of the upper cover 2 and a longitudinal channel 9 arranged on the left and right sides of the transverse channel 8, the transverse channel 8 is connected with the inner cavity 3, and the lower end of the longitudinal channel 9 is connected with the exhaust gap 7.

[0018] The push rod is a cross-shaped structure, and the push rod 4 is movably connected to the upper cover 2 through a spring 10. The lower end of the push rod 4 extends into the tightening section channel 6, and an O-ring 11 is provided to seal the tightening section channel 6 when there is no pressure.

[0019] The valve body 1 is provided with an outwardly expanded mounting edge, and a sealing ring 12 is provided at the bottom of the outwardly expanded mounting edge to ensure the seal between the valve body and the sealing gland. The bottom of the valve body 1 is located on the outer wall of the exhaust chamber 5 and is provided with an external thread 13, which facilitates the valve body to be screwed on the reserved threaded hole on the outer circle of the sealing gland.

[0020] Working principle:

[0021] When the piston rod moves, air pressure is generated inside the sealing cover and enters the exhaust chamber. The air pressure acts on the end face of the lower end of the push rod. When the pressure generated by the air pressure is greater than the pressure applied by the spring, the push rod opens, and the gas overflows and enters the inner cavity, and then passes through the exhaust channel group in the upper cover and is discharged from the exhaust gap. The labyrinth-like exhaust channel group structure in the upper cover can not only ensure exhaust, but also prevent external rainwater and dirt from entering the valve body, killing two birds with one stone.

[0022] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new exhaust valve, characterized in that: The valve body (1) comprises a valve body (1) on which an upper cover (2) is mounted, a push rod (4) being movably arranged in an inner cavity (3) formed by the valve body (1) and the upper cover (2), an exhaust chamber (5) being arranged below the inner cavity (3) in the valve body (1), and an upper end of the exhaust chamber (5) being connected to the inner cavity (3) via a tightening section channel (6); An exhaust gap (7) is left between the left and right extended parts of the upper cover (2) and the upper surface of the valve body (1), and an exhaust channel group is arranged inside the upper cover (2); The exhaust channel group comprises a transverse channel (8) arranged on the upper inner side of the upper cover (2) and longitudinal channels (9) arranged on the left and right sides of the transverse channel (8); the transverse channel (8) is connected to the inner cavity (3); and the lower end of the longitudinal channel (9) is connected to the exhaust gap (7).

2. A novel exhaust valve as claimed in claim 1, characterized in that: The push rod is a cross-shaped structure. The push rod (4) is movably connected to the upper cover (2) via a spring (10). The lower end of the push rod (4) extends into the tightening section channel (6), and an O-ring (11) is provided to seal the tightening section channel (6) when there is no pressure.

3. A novel exhaust valve as claimed in claim 1, characterized in that: The valve body (1) is provided with an outwardly expanded mounting edge, and a sealing ring (12) is provided at the bottom of the outwardly expanded mounting edge.

4. A novel exhaust valve as claimed in claim 1, characterized in that: The bottom of the valve body (1) is located on the outer wall of the exhaust chamber (5) and is provided with an external thread (13).

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