Improved pressure release valve of air compressor

Abstract

The utility model provides an improved pressure release valve of an air compressor, and belongs to the field of air compressors. The problem that an existing pressure release valve is poor in exhaust efficiency is solved. The improved pressure release valve of the air compressor comprises a barrel-shaped valve body, a tubular air inlet part is arranged at the lower end of the valve body, a ball and a spring enabling the ball to have the trend of blocking a lower end opening of the air inlet part are arranged in the air inlet part, a silencing block is fixed in the valve body, a circle of exhaust holes are formed in the side wall of the upper end of the valve body in a penetrating mode, and a blocking cover is fixedly arranged at the upper end of the valve body in a sleeving mode. An annular groove communicated with the exhaust hole is formed between the side wall of the blocking cover and the outer wall of the valve body, a conical flow guide face is arranged on the inner side face of the blocking cover, the diameter of the flow guide face is gradually increased from top to bottom, and the hole opening, located in the outer side face of the valve body, of the exhaust hole is completely aligned with the flow guide face. The improved pressure release valve of the air compressor is high in exhaust efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of air compressors and relates to an air compressor pressure relief valve, particularly an improved air compressor pressure relief valve. Background Technology

[0002] The air compressor pressure relief valve is a core component that ensures the safe operation of the equipment. Its main functions are: 1. pressure regulation; 2. safety protection; 3. eliminating pressure waves.

[0003] The existing pressure relief valve structure, such as the improved air compressor pressure relief valve proposed by the applicant (application number: 202321608960.7), includes a barrel-shaped valve body, a tubular air inlet at the lower end of the valve body, a ball inside the air inlet and a spring that tends to block the lower port of the air inlet, and a silencer block fixed inside the valve body. The valve body is characterized by having a ring of exhaust holes through the upper side wall of the valve body, and the silencer block being located between the exhaust holes and the air inlet; a cover is fitted and fixed to the upper end of the valve body, and an annular groove coaxial with the valve body is formed between the cover and the outer side wall of the valve body. The annular groove includes a closed bottom wall and a downward-facing opening, and the exhaust holes are directly opposite to and communicate with the annular groove.

[0004] In the aforementioned pressure relief valve, the inner side of the cover is a vertically arranged circumferential surface. The gas discharged from the exhaust port will rebound on the circumferential surface, causing exhaust blockage in the annular groove and affecting the exhaust speed. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an improved air compressor pressure relief valve, which solves the technical problem of how to improve exhaust efficiency.

[0006] The objective of this utility model can be achieved through the following technical solution: An improved air compressor pressure relief valve includes a barrel-shaped valve body, a tubular air inlet at the lower end of the valve body, a ball inside the air inlet and a spring that tends to block the lower port of the air inlet, a silencer block fixed inside the valve body, and a ring of exhaust holes through the upper side wall of the valve body, with the silencer block located between the exhaust holes and the air inlet; a cover is fitted and fixed to the upper end of the valve body, and an annular groove communicating with the exhaust hole is formed between the side wall of the cover and the outer wall of the valve body. The feature is that the inner side of the cover has a conical guide surface, and the guide surface and the cover are coaxially arranged; the diameter of the guide surface gradually increases from top to bottom, and the exhaust hole is located on the outer side of the valve body with the opening completely aligned with the guide surface.

[0007] The exhaust port is aligned with the guide surface whose diameter gradually increases from top to bottom. This not only expands the width of the annular groove at the guide surface, but also utilizes the slope of the guide surface to make the gas discharged from the exhaust port flow downward quickly, thereby effectively avoiding exhaust blockage and effectively improving the exhaust efficiency and smoothness of the pressure relief valve.

[0008] In the aforementioned improved air compressor pressure relief valve, the inner surface of the lower end of the baffle is a vertically arranged circumferential surface, and the circumferential surface is located below the aforementioned guide surface with a smooth transition between the two. This design reduces the diameter of the lower port of the baffle, resulting in better dust and impurity blocking.

[0009] In the aforementioned improved air compressor pressure relief valve, the exhaust port is straight and inclined, and the orifice of the exhaust port on the outer surface of the valve body is positioned lower than the other orifice of the exhaust port. The inclined exhaust port, combined with a tapered guide surface, allows gas to exit the annular groove more quickly, further improving the exhaust efficiency of the pressure relief valve.

[0010] In the aforementioned improved air compressor pressure relief valve, an upper pressure plate and a lower pressure plate are horizontally fixed within the valve body, and both the upper and lower pressure plates are densely covered with vertically penetrating air passages. The exhaust port, upper pressure plate, lower pressure plate, and air inlet are distributed sequentially from top to bottom, and the aforementioned muffler block is clamped and positioned between the upper and lower pressure plates. This design facilitates the installation and positioning of the muffler block.

[0011] In the aforementioned improved air compressor pressure relief valve, a baffle is pressed against the top wall of the valve body. A mounting hole is vertically opened in the middle of the top wall of the valve body, and a corresponding through hole is provided on the baffle. A screw is installed in the through hole, the screw rod is screwed into the mounting hole, and the screw head is pressed against the top surface of the baffle to stably connect the baffle and the valve body.

[0012] In the aforementioned improved air compressor pressure relief valve, a protrusion is formed on the inner side of the valve body top wall, and both the mounting hole and the screw rod extend to the protrusion. This design, by lengthening the engagement length between the screw and the mounting hole, improves the stability and strength of the cover's positioning.

[0013] In the aforementioned improved air compressor pressure relief valve, the mounting hole is through-hole, and a protrusion matching the lower end of the mounting hole is formed on the top wall of the upper pressure plate, with the protrusion locked inside the lower end of the mounting hole. The mounting hole serves as both a cover and a positioning feature for the upper pressure plate, providing a dual-purpose function that simplifies the structure and facilitates assembly.

[0014] In the aforementioned improved air compressor pressure relief valve, the bottom wall of the protrusion is lower than the upper orifice of the exhaust port, and the top wall of the upper pressure plate presses against the bottom surface of the protrusion, so that the upper pressure plate can be installed in place at one time, which is convenient for assembly.

[0015] Compared with existing technologies, this improved air compressor pressure relief valve has the following advantages:

[0016] 1. The exhaust port is aligned with the guide surface whose diameter gradually increases from top to bottom. This not only expands the width of the annular groove at the guide surface, but also uses the slope of the guide surface to make the gas discharged from the exhaust port flow downward quickly, thereby effectively avoiding exhaust blockage and effectively improving the exhaust efficiency and smoothness of the pressure relief valve.

[0017] 2. The mounting holes are used for positioning both the cover and the upper pressure plate, serving a dual purpose and simplifying the structure while facilitating assembly. Attached Figure Description

[0018] Figure 1 This is a cross-sectional schematic diagram of the pressure relief valve of this improved air compressor.

[0019] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0020] In the diagram, 1 is the valve body; 1a is the air inlet; 1b is the exhaust port; 1c is the sealing surface; 1d is the mounting hole; 1e is the protrusion; 2 is the ball; 3 is the spring; 4 is the muffler; 5 is the cover; 5a is the guide surface; 5b is the circumferential surface; 6 is the annular groove; 7 is the upper pressure plate; 7a is the protrusion; 8 is the lower pressure plate; and 9 is the screw. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] like Figure 1 As shown, the improved air compressor pressure relief valve includes a barrel-shaped valve body 1. The lower end of the valve body 1 is narrowed to form a tubular air inlet 1a, and the outer side wall of the air inlet 1a is provided with external threads to facilitate the disassembly and assembly of the pressure relief valve.

[0023] Specifically

[0024] The intake section 1a contains a sphere 2 and a spring 3 that tends to block the lower port of the intake section 1a. A muffler block 4 is fixed inside the valve body 1. A ring of exhaust holes 1b is provided through the upper side wall of the valve body 1, and the muffler block 4 is located between the exhaust holes 1b and the intake section 1a. A cover 5 is fitted and fixed to the upper end of the valve body 1, and the cover 5 and the valve body 1 are coaxially arranged. An annular groove 6 communicating with the exhaust holes 1b is formed between the side wall of the cover 5 and the outer wall of the valve body 1, and the annular groove 6 and the cover 5 are coaxially arranged. Figure 1 As shown, the inner side of the baffle 5 has a tapered guide surface 5a, and the guide surface 5a and the baffle 5 are coaxially arranged. The diameter of the guide surface 5a gradually increases from top to bottom, and the vent hole 1b is located on the outer side of the valve body 1 with the opening of the guide surface 5a completely aligned with the vent surface 5a.

[0025] The exhaust port 1b is perfectly aligned with the guide surface 5a, whose diameter gradually increases from top to bottom. This not only expands the width of the annular groove 6 at the guide surface 5a, but also utilizes the slope of the guide surface 5a to make the gas discharged from the exhaust port 1b flow downward quickly, thereby effectively avoiding exhaust blockage and effectively improving the exhaust efficiency and smoothness of the pressure relief valve.

[0026] To further explain, the lower inner surface of the baffle 5 is a vertically arranged circular surface 5b, and the circular surface 5b is located below the aforementioned guide surface 5a, with a smooth transition between the two. This design reduces the diameter of the lower port of the baffle 5, resulting in better dust and impurity blocking.

[0027] like Figure 1 As shown, the exhaust port 1b is straight and inclined, and the position of the orifice of the exhaust port 1b on the outer side of the valve body 1 is lower than the position of the other orifice of the exhaust port 1b. The inclined exhaust port 1b, combined with the conical guide surface 5a, allows the gas to be discharged from the annular groove 6 more quickly, further improving the exhaust efficiency of the pressure relief valve.

[0028] In this embodiment,

[0029] The installation method of the muffler block 4 is as follows: the muffler block 4 is clamped in the middle of the valve body 1; the upper pressure plate 7 and the lower pressure plate 8 are horizontally fixed inside the valve body 1, and the upper pressure plate 7 and the lower pressure plate 8 are densely covered with vertically penetrating air holes. The exhaust port 1b, the upper pressure plate 7, the lower pressure plate 8 and the air inlet 1a are distributed in sequence from top to bottom, and the muffler block 4 is clamped and positioned between the upper pressure plate 7 and the lower pressure plate 8.

[0030] The spring 3 and the ball 2 are installed as follows: The inner wall of the air intake 1a at the lower port has a conical sealing surface 1c, and the diameter of the sealing surface 1c gradually decreases from top to bottom. The two ends of the spring 3 press on the lower pressure plate 8 and the ball 2 respectively, and under the action of the spring 3, the ball 2 presses on the sealing surface 1c to seal the lower port of the air intake 1a.

[0031] The cover 5 is installed as follows: the cover 5 is pressed against the top wall of the valve body 1. A mounting hole 1d is vertically formed in the middle of the top wall of the valve body 1, and preferably, the mounting hole 1d is coaxial with the valve body 1. A through hole is correspondingly formed on the cover 5, and a screw 9 is installed in the through hole. The shank of the screw 9 is screwed into the mounting hole 1d, and the head of the screw 9 is pressed against the top surface of the cover 5 to stably connect the cover 5 and the valve body 1. Further, a protrusion 1e is formed on the inner side of the top wall of the valve body 1, and both the mounting hole 1d and the shank of the screw 9 extend to the protrusion 1e. By adopting the above design, the stability and strength of the cover 5 in positioning are improved by lengthening the engagement length between the screw 9 and the mounting hole 1d.

[0032] like Figure 1 and Figure 2As shown, the upper pressure plate 7 is installed as follows: the mounting hole 1d is through-hole, and a protrusion 7a matching the lower end of the mounting hole 1d is formed on the top wall of the upper pressure plate 7, and the protrusion 7a is engaged in the lower end of the mounting hole 1d. The mounting hole 1d is used for positioning both the cover 5 and the upper pressure plate 7, serving a dual function, simplifying the structure and facilitating assembly. Further, the bottom wall of the protrusion 1e is lower than the upper opening of the vent hole 1b, and the top wall of the upper pressure plate 7 presses against the bottom surface of the protrusion 1e, so that the upper pressure plate 7 is installed in place in one go, facilitating assembly.

[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An improved air compressor pressure relief valve, comprising a barrel-shaped valve body (1), the lower end of the valve body (1) being a tubular air inlet (1a), a ball (2) and a spring (3) that causes the ball (2) to block the lower port of the air inlet (1a) are provided inside the air inlet (1a), a silencer block (4) is fixed inside the valve body (1), an exhaust hole (1b) is provided through the upper side wall of the valve body (1), and the silencer block (4) is located between the exhaust hole (1b) and the air inlet (1a); a cover (5) is fitted and fixed on the upper end of the valve body (1), and an annular groove (6) communicating with the exhaust hole (1b) is formed between the side wall of the cover (5) and the outer wall of the valve body (1), characterized in that, The inner side of the cover (5) has a tapered guide surface (5a), and the guide surface (5a) and the cover (5) are coaxially arranged; the diameter of the guide surface (5a) gradually increases from top to bottom, and the exhaust hole (1b) is located on the outer side of the valve body (1) with this hole completely aligned with the guide surface (5a).

2. The improved air compressor pressure relief valve according to claim 1, characterized in that, The lower inner side of the cover (5) is a vertically arranged circumferential surface (5b), and the circumferential surface (5b) is located below the guide surface (5a) and the two are smoothly transitioned.

3. The improved air compressor pressure relief valve according to claim 1 or 2, characterized in that, The exhaust port (1b) is straight and inclined, and the position of the exhaust port (1b) on the outer side of the valve body (1) is lower than the position of the other opening of the exhaust port (1b).

4. The improved air compressor pressure relief valve according to claim 1, characterized in that, The valve body (1) has an upper pressure plate (7) and a lower pressure plate (8) fixed horizontally inside, and the upper pressure plate (7) and the lower pressure plate (8) are densely covered with vertically penetrating air holes; the exhaust hole (1b), the upper pressure plate (7), the lower pressure plate (8) and the air inlet (1a) are distributed from top to bottom, and the above-mentioned silencer block (4) is clamped and positioned between the upper pressure plate (7) and the lower pressure plate (8).

5. The improved air compressor pressure relief valve according to claim 4, characterized in that, The cover (5) is pressed on the top wall of the valve body (1). The valve body (1) has a vertically opened mounting hole (1d) in the middle of the top wall. The cover (5) has a corresponding through hole. The through hole has a screw (9). The screw (9) rod is screwed into the mounting hole (1d). The head of the screw (9) is pressed against the top surface of the cover (5).

6. The improved air compressor pressure relief valve according to claim 5, characterized in that, The valve body (1) has a protrusion (1e) formed on the inner side of the top wall, and the mounting hole (1d) and the screw (9) rod both extend to the protrusion (1e).

7. The improved air compressor pressure relief valve according to claim 6, characterized in that, The mounting hole (1d) is through-hole, and a protrusion (7a) matching the lower end of the mounting hole (1d) is formed on the top wall of the upper pressure plate (7), and the protrusion (7a) is stuck in the lower end of the mounting hole (1d).

8. The improved air compressor pressure relief valve according to claim 7, characterized in that, The bottom wall of the protrusion (1e) is lower than the upper opening of the vent hole (1b), and the top wall of the upper pressure plate (7) presses against the bottom surface of the protrusion (1e).

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