Screw air compressor with high pressure protection mechanism

Abstract

The utility model discloses a screw air compressor with high pressure protection mechanism, including gas holder and screw air compressor body, and the left side of gas holder upper end face is provided with pressure -relief subassembly, and the outside of pressure -relief subassembly is provided with protection subassembly, through to the clockwise rotation of adjusting screw, can make adjusting screw drop and drive extrusion piece drop together and further extrude compression spring, the elastic extrusion of compression spring to the plugging piston to gradually increase to the pressure relief maximum threshold value of pressure relief cylinder gradually increases, vice versa can make the pressure relief maximum threshold value of pressure relief cylinder gradually reduce, to the maximum pressure relief threshold size of pressure relief cylinder of staff according to different pressure relief requirement is matched adjustment, through the installation protection baffle and top protection piece, can shield protection to pressure relief cylinder, avoid the damage loose of pressure relief cylinder in the use process and be directly bumped, to this guarantee the use safety of pressure relief cylinder.

Description

Technical Field

[0001] This utility model relates to the field of screw air compressor technology, specifically a screw air compressor with a high-pressure protection mechanism. Background Technology

[0002] A screw air compressor is a positive displacement gas compression machine with a rotating working volume. To prevent excessive pressure in the air tank of a screw air compressor from causing danger, existing screw air compressors have corresponding high-pressure protection mechanisms installed in designated locations on the air tank to relieve excessive pressure in the air tank.

[0003] In the prior art, a screw air compressor with a high-pressure protection mechanism is disclosed in publication number "CN219317187U". The inner cavity of the screw air compressor is connected to the pressure relief box through a conduit. The horizontal plate inside the pressure relief box is subjected to gas pressure, and the gas pressure is applied to the pressure rod. The pressure rod slides along the inner wall of the top cylinder, compressing the spring A. At the same time, the horizontal plate drives the sealing plate to move upward. The upward movement of the sealing plate connects the pressure relief box to the outside through exhaust grooves at different heights, and the pressure is relieved by exhaust.

[0004] However, the above technical solutions and existing technologies have the following drawbacks: Although this screw air compressor has pressure relief protection capabilities, the elastic compressive force of spring A in the high-pressure protection component is not adjustable. Therefore, in actual use, it can only relieve the pressure of compressed air at the same pressure. It is inconvenient for operators to match and adjust the pressure relief magnitude of the high-pressure protection component according to different pressure relief threshold requirements, resulting in a limited applicability. Furthermore, the top cylinder in this high-pressure protection component lacks a corresponding protective structure, making it susceptible to damage and loosening due to direct impacts during use. Once the top cylinder is damaged or loosened, spring A will lose its stable elastic compressive force on the pressure rod, causing the high-pressure protection component to fail. Therefore, its safety in use needs to be improved. Utility Model Content

[0005] The purpose of this invention is to provide a screw air compressor with a high-pressure protection mechanism to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A screw air compressor with a high-pressure protection mechanism includes a support base, an air tank, and a screw air compressor body. The air tank is fixedly connected to the bottom of the screw air compressor body. Support bases are symmetrically fixedly connected to the left and right sides of the lower end face of the air tank. A pressure relief component is provided on the left side of the upper end face of the air tank, and the pressure relief component is used to relieve pressure on the air tank. A protective component is provided on the outside of the pressure relief component, and the protective component is used to protect the pressure relief component from impact.

[0007] Preferably, the pressure relief assembly includes a connecting pipe, a connecting flange, a vent hole, a pressure relief cylinder, a cylinder cover, an internally threaded support ring, an adjusting screw, a compression plate, a compression spring, and a sealing piston. The connecting pipe is fixedly connected to the left side of the upper end face of the gas storage tank. The pressure relief cylinder is installed at the upper end of the connecting pipe. The pressure relief cylinder and the connecting pipe are connected and fixed through the connecting flange. Vent holes are symmetrically opened on the front and rear sides of the annular side of the pressure relief cylinder. A cylinder cover is installed on the upper end face of the pressure relief cylinder. An internally threaded support ring is fixedly connected to the middle position of the upper end face of the cylinder cover. An adjusting screw is installed inside the internally threaded support ring. A compression plate is attached to the lower end face of the adjusting screw. A compression spring is installed at the middle position of the lower end face of the compression plate. A sealing piston is inserted into the lower side of the inside of the pressure relief cylinder.

[0008] Preferably, a sealing ring is fitted on the annular side of the sealing piston, and a limit ring is provided at the middle position of the upper end face of the sealing piston, and the limit ring is matched with the compression spring.

[0009] Preferably, the protective assembly includes a top protective plate, an abutting screw, a protective stop bar, a supporting bottom ring, an annular base, and an internally threaded through hole. The supporting bottom ring is fixedly connected to the left side of the upper end face of the gas storage tank. The annular base is installed internally by the internal thread of the supporting bottom ring. Multiple protective stops are fixedly connected to the upper end face of the annular base. The top protective plate is fixedly connected to the upper end of the protective stops. An internally threaded through hole is opened at the middle position of the upper end face of the top protective plate. An abutting screw is installed internally by the internal thread of the internally threaded through hole.

[0010] Preferably, the upper end of the abutting screw is provided with a turntable, and the annular base is connected to the supporting bottom ring by a threaded connection.

[0011] Preferably, a limit stop is fixedly connected to the lower side of the inner wall of the pressure relief cylinder, the outer diameter of the extrusion plate and the outer diameter of the sealing piston are the same as the inner diameter of the pressure relief cylinder, and the cylinder cover is a detachable structure.

[0012] Preferably, a rubber vibration damping pad is bonded to the lower end face of the support base.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. By rotating the adjusting screw clockwise, the screw descends, causing the compression plate to descend as well, further compressing the compression spring. At this time, the elastic compression force of the compression spring on the sealing piston gradually increases, thereby gradually increasing the maximum pressure relief threshold of the pressure relief cylinder. Conversely, rotating the screw clockwise gradually decreases the elastic compression force of the compression spring on the sealing piston, thereby gradually decreasing the maximum pressure relief threshold of the pressure relief cylinder. This allows operators to match and adjust the maximum pressure relief threshold of the pressure relief cylinder according to different pressure relief requirements, making it widely applicable. 2. By installing the support bottom ring and annular base, the protective bar and top protective plate can be supported and fixed, so that the protective bar and top protective plate can shield and protect the pressure relief cylinder, preventing it from being damaged or loosened by direct impact during use, thus ensuring the safety of the pressure relief cylinder. By rotating the contact screw clockwise, the contact screw can descend in the internal threaded through hole to engage and position the adjusting screw, preventing the adjusting screw from rotating during use, thus ensuring the stability of the extrusion plate during use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 for Figure 1 Enlarged view of A in the middle; Figure 3 This is a structural diagram of the pressure relief component in this utility model; Figure 4 This is a cross-sectional view of the pressure relief cylinder in this utility model; Figure 5 This is a schematic diagram of the explosion state of the protective component in this utility model.

[0015] In the diagram: 1. Support base; 11. Rubber vibration damping pad; 2. Air tank; 3. Screw air compressor body; 4. Protective components; 41. Top protective plate; 42. Turntable; 43. Contact screw; 44. Protective stop bar; 45. Support bottom ring; 46. Annular base; 47. Internal threaded through hole; 5. Pressure relief component; 51. Connecting pipe; 52. Connecting flange; 53. Air vent; 54. Pressure relief cylinder; 55. Cylinder cover; 56. Internal threaded support ring; 57. Adjusting screw; 58. Extrusion plate; 59. Compression spring; 511. Limiting ring; 512. Sealing ring; 513. Blocking piston; 514. Limiting stop block. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-5 This utility model provides a technical solution: Example 1: A screw air compressor with a high-pressure protection mechanism includes a support base 1, an air tank 2, and a screw air compressor body 3. The air tank 2 is fixedly connected to the bottom of the screw air compressor body 3. The air tank 2 can store a certain amount of compressed air generated by the screw air compressor body 3. The support base 1 is symmetrically fixedly connected to the left and right sides of the lower end face of the air tank 2. The support base 1 can support and fix the air tank 2. A rubber vibration isolation pad 11 is bonded to the lower end face of the support base 1. The rubber vibration isolation pad 11 can prevent resonance noise between the support base 1 and the ground during the operation of the screw air compressor body 3. Since the detailed internal structure and working principle of the screw air compressor body 3 are relatively mature technologies in the prior art, they will not be described in detail here.

[0018] A pressure relief component 5 is provided on the left side of the upper end face of the gas storage tank 2. The pressure relief component 5 is used to relieve pressure in the gas storage tank 2 to prevent the internal gas pressure from being too high. A protective component 4 is provided on the outside of the pressure relief component 5 to protect the pressure relief component 5 from impact.

[0019] The pressure relief assembly 5 includes a connecting pipe 51, a connecting flange 52, a vent hole 53, a pressure relief cylinder 54, a cylinder cover 55, an internally threaded support ring 56, an adjusting screw 57, a compression plate 58, a compression spring 59, and a sealing piston 513. The connecting pipe 51 is fixedly connected to the left side of the upper end face of the air storage tank 2. The connecting pipe 51 is connected to the air storage tank 2 by welding. The connecting pipe 51 can introduce compressed air from the air storage tank 2 into the pressure relief cylinder 54. The pressure relief cylinder 54 is installed at the upper end of the connecting pipe 51. The pressure relief cylinder 54 can limit and protect the sealing piston 513 and the compression plate 58. The pressure relief cylinder 54 is connected and fixed to the connecting pipe 51 by a connecting flange 52, so that the pressure relief cylinder 54 can be disassembled, replaced and maintained by the staff later. The pressure relief cylinder 54 has symmetrical vent holes 53 on the front and rear sides of the annular side. The vent holes 53 can release the compressed air in the pressure relief cylinder 54 after the sealing piston 513 moves up a certain distance to relieve pressure. The pressure relief cylinder 54 is equipped with a cylinder cover 55. The cylinder cover 55 is a detachable structure. The detachable cylinder cover 55 makes it convenient for the staff to remove the extrusion plate 58, compression spring 59 and sealing piston 513 from the pressure relief cylinder 54 for replacement.

[0020] An internally threaded support ring 56 is fixedly connected to the middle position of the upper end face of the cylinder cover 55. The inner annular side of the internally threaded support ring 56 is provided with internal threads, and the internal threads mesh with the adjusting screw 57. The internally threaded support ring 56, with its internal threads on the inner annular side, enables the adjusting screw 57 to rise and fall when rotating forward or backward. The adjusting screw 57 is installed inside the internal thread of the internally threaded support ring 56. The adjusting screw 57 can provide abutment support to the upper end face of the extrusion plate 58. The lower end face of the adjusting screw 57 is attached to the extrusion plate 58. The extrusion plate 58 can provide blocking support to the upper end of the compression spring 59. The compression spring 59 is installed at the middle position of the lower end face of the extrusion plate 58. The compression spring 59 can provide elastic support to the sealing piston 513. The sealing piston 513 is inserted into the lower side of the pressure relief cylinder 54. The outer diameter of the extrusion plate 58 and the outer diameter of the sealing piston 513 are the same as the inner diameter of the pressure relief cylinder 54. The sealing piston 513 can seal the lower side of the pressure relief cylinder 54.

[0021] A sealing ring 512 is fitted on the annular side of the sealing piston 513. The sealing ring 512 is made of fluororubber, which improves the sealing performance between the sealing piston 513 and the pressure relief cylinder 54. A limit ring 511 is provided at the middle position of the upper end face of the sealing piston 513, and the limit ring 511 matches the compression spring 59. The limit ring 511 and the sealing piston 513 are an integral structure. The limit ring 511 can limit the lower end of the compression spring 59 to prevent the compression spring 59 from shifting during use. A limit stop 514 is fixedly connected to the lower side of the inner wall of the pressure relief cylinder 54. The limit stop 514 and the pressure relief cylinder 54 are an integral structure. The limit stop 514 can block and limit the lower end face of the sealing piston 513 to prevent the sealing piston 513 from moving down excessively.

[0022] Example 2: Based on Embodiment 1, in this embodiment, by installing a supporting bottom ring 45 and an annular base 46, the protective baffle 44 and the top protective plate 41 can be supported and fixed, so that the protective baffle 44 and the top protective plate 41 can shield and protect the pressure relief cylinder 54, preventing the pressure relief cylinder 54 from being damaged or loosened by direct impact during use, thereby ensuring the safety of the pressure relief cylinder 54 in use.

[0023] The protective assembly 4 includes a top protective plate 41, a contact screw 43, a protective stop bar 44, a supporting bottom ring 45, an annular base 46, and an internally threaded through hole 47. The supporting bottom ring 45 is fixedly connected to the left side of the upper end face of the gas storage tank 2. The supporting bottom ring 45 is connected to the gas storage tank 2 by welding. The supporting bottom ring 45 can support and limit the annular base 46. The annular base 46 is installed in the internal thread of the supporting bottom ring 45. The annular base 46 can support the protective stop bar 44. Multiple protective stop bars 44 are fixedly connected to the upper end face of the annular base 46. The protective stop bars 44 are connected to the annular base 46 and the top protective plate 41 by welding. The top protective plate 41 is fixedly connected to the upper end of the protective stop bar 44. The protective stop bar 44 can shield and protect the annular side of the pressure relief cylinder 54, while the top protective plate 41 can shield and protect the upper end of the pressure relief cylinder 54, thereby preventing the pressure relief cylinder 54 from being damaged by impact during use.

[0024] A threaded through hole 47 is provided in the middle of the upper end face of the top protective plate 41. The threaded through hole 47 enables the abutment screw 43 to lift and lower when rotating forward or backward. The abutment screw 43 is installed inside the threaded through hole 47. The abutment screw 43 can abut against the top of the adjusting screw 57 to position it and prevent the adjusting screw 57 from easily rotating during use. A turntable 42 is provided at the upper end of the abutment screw 43. The turntable 42 and the abutment screw 43 are an integral structure. The turntable 42 makes it convenient for the staff to rotate the abutment screw 43 by hand. The annular base 46 is connected to the support bottom ring 45 by a threaded connection so that the staff can rotate and disassemble the annular base 46 later.

[0025] Working Principle: During the operation of the screw air compressor body 3, when the compressed air pressure inside the air tank 2 is too high, the compressed air entering the pressure relief cylinder 54 through the connecting pipe 51 will exert an upward squeezing force on the sealing piston 513, causing the sealing piston 513 to move upward. When the bottom height of the sealing piston 513 rises higher than the height of the vent hole 53, the compressed air inside the pressure relief cylinder 54 will be discharged outward to relieve pressure, thus preventing the compressed air pressure inside the air tank 2 from becoming too high and not being relieved in time, which could lead to danger. When the compressed air pressure inside the air tank 2 is less than the squeezing force of the compression spring 59, the elastic squeezing force of the compression spring 59 will cause the sealing piston 513 to descend and block the vent hole 53, preventing the compressed air inside the pressure relief cylinder 54 from continuing to be depressurized, thus maintaining the pressure balance of the compressed air inside the air tank 2, thereby providing high-pressure protection for the air tank 2. During this process, the limit stop 514 will move the sealing piston 513 downward. The range is limited to prevent the sealing piston 513 from moving too far downwards. Two sets of sealing rings 512 are installed to improve the sealing between the sealing piston 513 and the pressure relief cylinder 54, preventing compressed air inside the pressure relief cylinder 54 from escaping through the gap between the sealing piston 513 and the pressure relief cylinder 54. When the operator uses an external wrench to turn the adjusting screw 57 clockwise, the adjusting screw 57 will descend and drive the compression plate 58 to descend as well. The descending compression plate 58 will further compress the compression spring 59, gradually increasing the elastic compression force of the compression spring 59 on the sealing piston 513, thereby gradually increasing the maximum pressure relief threshold of the pressure relief cylinder 54. Similarly, when the adjusting screw 57 is turned counterclockwise, the elastic compression force of the compression spring 59 on the sealing piston 513 will gradually decrease, thereby gradually decreasing the maximum pressure relief threshold of the pressure relief cylinder 54. This allows the operator to adjust the maximum pressure relief threshold of the pressure relief cylinder 54 according to different pressure relief requirements. During the use of the pressure relief cylinder 54, the support bottom ring 45 can limit and fix the annular base 46 so that the annular base 46 can support and fix the protective stop bar 44 and the top protective plate 41. The protective stop bar 44 and the top protective plate 41 can shield and protect the pressure relief cylinder 54, thereby preventing the pressure relief cylinder 54 from being damaged by direct impact during use. When the abutting screw 43 is rotated clockwise by the turntable 42, the abutting screw 43 will descend in the internal thread through hole 47 and abut against the top of the adjusting screw 57, thereby positioning the adjusting screw 57 and preventing the adjusting screw 57 from rotating during use, thus ensuring the stability of the extrusion plate 58. Later, the staff only needs to first rotate the abutting screw 43 counterclockwise to loosen it, and then rotate the annular base 46 counterclockwise to disassemble it, so that the adjusting screw 57 can be rotated and adjusted again, or the pressure relief cylinder 54 can be disassembled, replaced and maintained.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw air compressor with a high-pressure protection mechanism, comprising a support base (1), an air tank (2), and a screw air compressor body (3), characterized in that: The bottom of the screw air compressor body (3) is fixedly connected to an air tank (2). Support seats (1) are symmetrically fixedly connected to the left and right sides of the lower end face of the air tank (2). A pressure relief component (5) is provided on the left side of the upper end face of the air tank (2), and the pressure relief component (5) is used to protect the air tank (2) from pressure relief. A protective component (4) is provided on the outside of the pressure relief component (5), and the protective component (4) is used to protect the pressure relief component (5) from impact.

2. A screw air compressor with a high-pressure protection mechanism according to claim 1, characterized in that: The pressure relief assembly (5) includes a connecting pipe (51), a connecting flange (52), a vent hole (53), a pressure relief cylinder (54), a cylinder cover (55), an internally threaded support ring (56), an adjusting screw (57), a compression plate (58), a compression spring (59), and a sealing piston (513). The connecting pipe (51) is fixedly connected to the left side of the upper end face of the gas storage tank (2). The pressure relief cylinder (54) is installed at the upper end of the connecting pipe (51). The pressure relief cylinder (54) and the connecting pipe (51) are connected and fixed through the connecting flange (52). The pressure cylinder (54) has symmetrical vent holes (53) on the front and rear sides of the annular side. A cylinder cover (55) is installed on the upper end face of the pressure relief cylinder (54). An internal thread support ring (56) is fixedly connected to the middle position of the upper end face of the cylinder cover (55). An adjusting screw (57) is installed inside the internal thread support ring (56). An extrusion plate (58) is attached to the lower end face of the adjusting screw (57). A compression spring (59) is installed in the middle position of the lower end face of the extrusion plate (58). A sealing piston (513) is inserted into the lower side of the pressure relief cylinder (54).

3. A screw air compressor with a high-pressure protection mechanism according to claim 2, characterized in that: The sealing piston (513) has a sealing ring (512) fitted on its annular side. A limit ring (511) is provided at the middle position of the upper end face of the sealing piston (513), and the limit ring (511) is matched with the compression spring (59).

4. A screw air compressor with a high-pressure protection mechanism according to claim 1, characterized in that: The protective assembly (4) includes a top protective plate (41), an abutting screw (43), a protective stop bar (44), a supporting bottom ring (45), an annular base (46), and an internally threaded through hole (47). The supporting bottom ring (45) is fixedly connected to the left side of the upper end face of the gas storage tank (2). The annular base (46) is installed in the internal thread of the supporting bottom ring (45). Multiple protective stops (44) are fixedly connected to the upper end face of the annular base (46). The top protective plate (41) is fixedly connected to the upper end of the protective stops (44). An internally threaded through hole (47) is opened in the middle of the upper end face of the top protective plate (41). The abutting screw (43) is installed in the internal thread of the internally threaded through hole (47).

5. A screw air compressor with a high-pressure protection mechanism according to claim 4, characterized in that: The upper end of the contact screw (43) is provided with a turntable (42), and the annular base (46) and the supporting bottom ring (45) are connected by a threaded connection.

6. A screw air compressor with a high-pressure protection mechanism according to claim 2, characterized in that: The pressure relief cylinder (54) has a fixed stop block (514) on the lower side of its inner wall. The outer diameter of the extrusion plate (58) and the outer diameter of the sealing piston (513) are the same as the inner diameter of the pressure relief cylinder (54). The cylinder cover (55) is a detachable structure.

7. A screw air compressor with a high-pressure protection mechanism according to claim 1, characterized in that: A rubber vibration isolation pad (11) is bonded to the lower end face of the support base (1).

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