Air compressor started under pressure

Abstract

The utility model provides an air compressor started under pressure. The air compressor comprises an air cylinder cover, a pressure relief valve plate and an air compressor body. A limiting protrusion is formed on the top face, facing the air cylinder cover, of the pressure relief valve plate, a first pressure relief hole and a first screw hole which penetrate through the valve plate are formed in the limiting protrusion, a pressure relief structure is installed on the limiting protrusion in a matched mode, and the pressure relief structure comprises a fixing screw, a screw gasket and an elastic base plate. A limiting flow guide groove is formed in the bottom face, facing a piston in the air compressor body, of the pressure relief valve plate, a second pressure relief hole and a second screw hole are formed in the two sides of the limiting flow guide groove correspondingly, and the limiting flow guide groove, the second pressure relief hole and the second screw hole are also installed with the pressure relief structure in a matched mode. According to the utility model, a self-elastic pressure relief effect is formed in the air compressor, so that the normal operation of the air compressor can be kept, the air compressor is started under pressure and is not easy to jump, and the air compressor has the advantages of improving the working efficiency, reducing the energy consumption and prolonging the service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of air compressors, and in particular relates to a pressure-started air compressor. Background Art

[0002] A pressurized start of an air compressor refers to a situation where the back pressure of the air compressor is too high during startup. This situation usually occurs after the air compressor system stops working. Due to a faulty minimum pressure valve or a clogged pressure relief system, the pressure inside the system remains high. When the air compressor is restarted, if the internal pressure is not completely released, the motor will overload and the protector will trip. Therefore, pressurized start of the air compressor can easily cause the air compressor to trip. On the other hand, pressurized start of the air compressor can reduce the startup time of the equipment, improve work efficiency, reduce energy consumption and extend the service life of the equipment. Therefore, it is necessary to design an air compressor that can start under pressure and is not prone to tripping.

[0003] Patent application number CN201822149847.2 discloses an air compressor with startup protection, which includes a housing, a motor installed in the housing, a transmission mechanism connected to the motor, and an air pump connected to the transmission mechanism. The side wall of the cylinder in the air pump is provided with at least two startup pressure-reducing holes. When the air pump is started, the pressure in the cylinder will decrease, and the starting torque will be small, so the instantaneous starting current of the motor will not be too large, thus protecting the motor. However, this patent states that when the air compressor is operating normally after startup, the setting of the startup pressure-reducing holes will cause the air pump to continue to leak, thereby affecting the normal operation of the air pump. Utility Model Content

[0004] The purpose of the utility model is to provide an air compressor that can be started under pressure in order to solve the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions: A pressure-started air compressor comprises a cylinder head, a pressure relief valve plate and an air compressor body;

[0006] The pressure relief valve plate is formed with a limiting protrusion on the top surface facing the cylinder head, and a first pressure relief hole and a first screw hole penetrating the valve plate are formed on the limiting protrusion. A pressure relief structure is mounted on the limiting protrusion, and the pressure relief structure includes a fixing screw, a screw washer, and an elastic pad. When installed, the fixing screw passes through the screw washer and one end of the elastic pad in sequence and is fixedly connected to the first screw hole, and the other end of the elastic pad covers the first pressure relief hole.

[0007] The pressure relief valve plate is provided with a limiting guide groove on the bottom surface facing the piston inside the air compressor body, and a second pressure relief hole and a second screw hole are respectively provided on both sides of the limiting guide groove. The limiting guide groove, the second pressure relief hole and the second screw hole are also installed in coordination with the pressure relief structure. When installing, the fixing screw passes through the screw gasket and one end of the elastic pad in sequence and is fixedly connected to the second screw hole, and the other end of the elastic pad covers the second pressure relief hole.

[0008] In the above-mentioned pressure-started air compressor, a limiting member is installed on the limiting protrusion on the top surface of the pressure relief valve plate to correspond to the pressure relief structure.

[0009] In the above-mentioned pressure-started air compressor, an annular sealing groove is provided on the bottom surface of the pressure relief valve plate outside the pressure relief structure, and a sealing ring is fitted in the sealing groove.

[0010] In the above-mentioned pressure-started air compressor, the pressure relief valve plate is provided with a plurality of penetrating bolt holes at the edge of the valve plate, and the bottom surface of the pressure relief valve plate is provided with a plurality of material reduction grooves around the bolt holes and the sealing grooves.

[0011] In the above-mentioned pressure-started air compressor, the two pressure relief structures on the top and bottom surfaces of the pressure relief valve plate are centrally symmetrically distributed, and the first pressure relief hole and the first bolt hole and the second pressure relief hole and the second bolt hole are also centrally symmetrically distributed.

[0012] Compared with the prior art, the utility model provides an air compressor that starts under pressure. By arranging a pressure relief hole and a pressure relief structure on the pressure relief valve plate, when there is an air pressure difference between the upper and lower spaces of the pressure relief valve plate inside the air compressor, the elastic pad in the pressure relief structure will tilt toward the low-pressure side and open the pressure relief hole, thereby achieving an elastic pressure relief effect, and enabling the air compressor to start under pressure without affecting normal operation and not easily tripping. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the explosion structure of the air compressor that starts under pressure;

[0014] Figure 2 This is a schematic diagram of the top surface structure of the pressure relief valve plate in the pressurized start air compressor;

[0015] Figure 3 This is a schematic diagram of the bottom structure of the pressure relief valve plate in the pressurized start-up air compressor.

[0016] In the above figure, 100, cylinder head; 200, pressure relief valve plate; 210, limit member; 220, bolt hole; 230, limit protrusion; 231, first pressure relief hole; 232, first screw hole; 240, pressure relief structure; 241, fixing screw; 242, screw gasket; 243, elastic gasket; 250, limit guide groove; 251, second pressure relief hole; 252, second screw hole; 260, sealing groove; 261, sealing ring; 270, material reduction groove; 300, air compressor body. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] Pressurized start of an air compressor refers to the situation where the back pressure of the air compressor is too high when starting. Therefore, in order to achieve pressurized start of the air compressor and prevent it from tripping, the internal structure of the air compressor needs to have a good pressure relief effect without affecting normal operation. Figures 1 to 3 As shown, the pressure-started air compressor includes a cylinder head 100, a pressure relief valve plate 200 and an air compressor body 300, wherein the air compressor can be of different models such as single-cylinder, double-cylinder and multi-cylinder. The number of pressure relief valve plates 200 on the same air compressor is equal to the number of cylinders and cylinder heads 100.

[0019] like Figure 1 As shown, a limiting protrusion 230 is formed on the top surface of the pressure relief valve plate 200 facing the cylinder head 100. The limiting protrusion 230 is provided with a first pressure relief hole 231 and a first screw hole 232 that penetrate the pressure relief valve plate 200. A pressure relief structure 240 is installed on the limiting protrusion 230. The pressure relief structure 240 includes a fixing screw 241, a screw gasket 242 and an elastic pad. A limiting member 210 is correspondingly installed on the pressure relief structure 240 on the top surface of the pressure relief valve plate 200. The limiting member 210 facilitates the overall installation and cooperation of the pressure relief valve plate 200 and the cylinder head 100.

[0020] When the pressure relief structure 240 is installed on the top surface of the pressure relief valve plate 200, the fixing screw 241 passes through the screw gasket 242 and one end of the elastic pad from top to bottom and is fixed to the first screw hole 232, and the other end of the elastic pad covers the first pressure relief hole 231 to seal the first pressure relief hole 231.

[0021] like Figure 2 As shown, the pressure relief valve plate 200 is provided with a limiting guide groove 250 on the bottom surface facing the piston inside the air compressor body 300, and a second pressure relief hole 251 and a second screw hole 252 are respectively provided on both sides of the limiting guide groove 250, wherein the second pressure relief hole 251 is connected to the limiting guide groove 250 through a plurality of slots.

[0022] The limiting guide groove 250, the second pressure relief hole 251, and the second screw hole 252 are also installed in conjunction with the pressure relief structure 240. When the pressure relief structure 240 is installed on the bottom surface of the pressure relief valve plate 200, the fixing screw 241 passes through the screw washer 242 and one end of the elastic pad from bottom to top, and is fixed to the second screw hole 252. The other end of the elastic pad covers the second pressure relief hole 251, thereby blocking the second pressure relief hole 251. The two pressure relief structures 240 on the top and bottom surfaces of the pressure relief valve plate 200 are centrally symmetrically distributed. The first pressure relief hole 231 and the first bolt hole 220 are also centrally symmetrically distributed with the second pressure relief hole 251 and the second bolt hole 220.

[0023] To further explain, an annular sealing groove 260 is opened on the bottom surface of the pressure relief valve plate 200 outside the pressure relief structure 240, and a sealing ring 261 is installed in the sealing groove 260. The sealing groove 260 and the sealing ring 261 cooperate with the piston below the pressure relief valve plate 200.

[0024] To further illustrate, the pressure relief valve plate 200 has several through-holes 220 formed along its edge. Bolts in these holes securely connect the cylinder head 100, the valve plate, and the compressor body 300. Several material reduction grooves 270 are defined on the bottom surface of the pressure relief valve plate 200, surrounding the bolt holes 220 and the sealing groove 260. These grooves are used to reduce material waste and lighten the valve plate's weight.

[0025] The working principle of the present invention is as follows: when the air compressor is started under pressure due to a high internal air pressure, the air pressure inside the air compressor body 300 is greater than the air pressure inside the cylinder head 100. The elastic pad at the bottom of the pressure relief valve plate 200 is pressed against the second pressure relief hole 251 to tightly seal it. The elastic pad at the top of the pressure relief valve plate 200 tilts toward the cylinder head 100 to open the first pressure relief hole 231, thereby releasing the air pressure inside the air compressor and preventing the air compressor from tripping. Conversely, when the air pressure inside the cylinder head 100 is greater than the air pressure inside the air compressor body 300, the elastic pad at the top of the pressure relief valve plate 200 is pressed against the first pressure relief hole 231 to tightly seal it. The elastic pad at the bottom of the pressure relief valve plate 200 tilts toward the piston to open the second pressure relief hole 251, thereby releasing the air pressure inside the cylinder head 100.

[0026] The utility model forms an autonomous elastic pressure relief effect inside the air compressor by arranging a pressure relief hole and a pressure relief structure 240 on the valve plate, which not only maintains the normal operation of the air compressor, but also realizes the pressure-starting of the air compressor without the risk of tripping, thereby reducing the startup time of the air compressor equipment, improving work efficiency, reducing energy consumption and extending the service life of the equipment.

[0027] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0028] Although various terms are used in this document, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A pressure-started air compressor, comprising a cylinder head (100), a pressure relief valve plate (200) and an air compressor body (300); characterized in that: The pressure relief valve plate (200) is provided with a limiting protrusion (230) on the top surface facing the cylinder head (100), and a first pressure relief hole (231) and a first screw hole (232) penetrating the valve plate are formed on the limiting protrusion (230). A pressure relief structure (240) is installed on the limiting protrusion (230), and the pressure relief structure (240) includes a fixing screw (241), a screw gasket (242) and an elastic gasket. When installed, the fixing screw (241) passes through the screw gasket (242) and one end of the elastic gasket in sequence and is fixedly connected to the first screw hole (232), and the other end of the elastic gasket covers the first pressure relief hole (231). The pressure relief valve plate (200) is provided with a limiting guide groove (250) on the bottom surface of the piston inside the air compressor body (300), and a second pressure relief hole (251) and a second screw hole (252) are respectively provided on both sides of the limiting guide groove (250). The limiting guide groove (250), the second pressure relief hole (251) and the second screw hole (252) are also installed in coordination with the pressure relief structure (240). When installing, the fixing screw (241) passes through the screw gasket (242) and one end of the elastic pad in sequence to be fixedly connected to the second screw hole (252), and the other end of the elastic pad covers the second pressure relief hole (251).

2. The air compressor started under pressure according to claim 1, characterized in that: A limiting member (210) is mounted on the limiting protrusion (230) on the top surface of the pressure relief valve plate (200) to correspond to the pressure relief structure (240).

3. The air compressor started under pressure according to claim 1, characterized in that: An annular sealing groove (260) is provided on the bottom surface of the pressure relief valve plate (200) outside the pressure relief structure (240), and a sealing ring (261) is installed in the sealing groove (260).

4. The air compressor started under pressure according to claim 3, characterized in that: The pressure relief valve plate (200) is provided with a plurality of penetrating bolt holes (220) at the edge of the valve plate, and the bottom surface of the pressure relief valve plate (200) is provided with a plurality of material reduction grooves (270) around the bolt holes (220) and the sealing grooves (260).

5. The air compressor started under pressure according to claim 1, characterized in that: The two pressure relief structures (240) on the top and bottom surfaces of the pressure relief valve plate (200) are distributed in a centrally symmetrical manner, and the first pressure relief hole (231) and the first bolt hole (220) and the second pressure relief hole (251) and the second bolt hole (220) are also distributed in a centrally symmetrical manner.

Images