Screw compressor

Abstract

The utility model relates to a screw compressor, which belongs to the field of screw compressors and comprises a compressor body, a first gas storage tank, a second gas storage tank and a motor for driving the compressor body to operate, and the compressor body is positioned at the top of the first gas storage tank and communicated with the first gas storage tank. A gas guide pipe and a water guide pipe are communicated between the first gas storage tank and the second gas storage tank, and the gas guide pipe and the water guide pipe are both provided with valves used for controlling on-off of pipelines. Air outlets are formed in the top of the first air storage tank and the top of the second air storage tank, three-way valves are arranged at the two air outlets and connected to two inlets of the three-way valves respectively, and outlets of the three-way valves are air supply ports. A first exhaust valve and a drainage valve are arranged at the end, away from the first gas storage tank, of the second gas storage tank, the first exhaust valve can control gas in the second gas storage tank to be exhausted, and the drainage valve can control liquid in the second gas storage tank to be exhausted. The gas storage tank has the effect that it is guaranteed that the gas storage tank can continuously provide compressed gas outwards in the drainage process.

Description

Technical Field

[0001] The present application relates to the field of screw compressors, and in particular to a screw compressor. Background Art

[0002] Screw compressor is a commonly used industrial compressed air equipment, which compresses air through rotating screws to produce high-pressure gas. Screw compressors are widely used in manufacturing, construction sites, chemical industry, electronics, food processing and other fields, providing stable and reliable compressed air supply for various equipment and production lines.

[0003] Screw compressors are generally equipped with a cylindrical horizontal air tank. When the air compressor stores air in the air tank, it will also input water vapor into the air tank, so there is usually water in the air tank. There is a drainage hole at the bottom of the air tank. When draining water, the plug at the bottom of the air tank needs to be unscrewed, and the accumulated water needs to be discharged regularly.

[0004] In view of the above-mentioned related technologies, when draining water, the screw compressor generally needs to be shut down to discharge the pressure in the gas tank and then drain the gas tank. As a result, the gas tank cannot normally provide compressed gas to the outside during the drainage process, resulting in production or operation interruption and affecting work efficiency. Utility Model Content

[0005] In order to enable the gas storage tank to continuously provide compressed gas to the outside during the drainage process, the present application provides a screw compressor.

[0006] The present application provides a screw compressor adopting the following technical solution:

[0007] A screw compressor comprises a machine body, a first air tank, a second air tank and a motor driving the compressor body to operate; the first air tank and the second air tank are coaxially arranged horizontally; the compressor body and the motor are located at the top of the first air tank and connected to the first air tank; an air guide pipe and a water guide pipe are connected between the first air tank and the second air tank, the air guide pipe is located near the top of the first air tank and the second air tank, and the water guide pipe is located near the bottom of the first air tank and the second air tank; the air guide pipe and the water guide pipe are both provided with valves for controlling the on-off of the pipelines; the tops of the first air tank and the second air tank are both provided with air outlets, and the two air outlets are provided with A three-way valve is provided, and is respectively connected to the two inlets of the three-way valve, the outlet of the three-way valve is an air supply port, which delivers high-pressure gas to external equipment; the second gas tank is provided with a first exhaust valve and a drain valve at one end away from the first gas tank, the first exhaust valve is located near the top of the second gas tank, and can control the discharge of gas in the second gas tank, the drain valve is located near the bottom of the second gas tank, and can control the discharge of liquid in the second gas tank; a lifting assembly is provided at the bottom of the first gas tank and the second gas tank, and the lifting assembly can lift the first gas tank away from one end of the second gas tank, so that the liquid in the first gas tank flows into the second gas tank.

[0008] By adopting the above technical solution, the compressed air and liquid between the first gas tank and the second gas tank can be interconnected through the air pipe and the water pipe, and the three-way valve can choose to connect one of the two air outlets. When the device needs to drain water, the lifting component can raise the end of the first gas tank away from the air pipe, so that the water in the first gas tank is introduced into the second gas tank through the water pipe, and the lifting component is convenient for completely introducing the water inside the first gas tank into the second gas tank. Then close the valves of the water pipe and the air pipe, so that the three-way valve connects the air supply port with the air outlet of the first gas tank, and the second gas tank is depressurized and drained through the first exhaust valve and the drain valve. That is, in the process of draining water from the second gas tank, the first gas tank can continuously provide compressed air, which greatly improves the working efficiency of the compressor, and at the same time avoids the situation where the compressor repeatedly pressurizes the gas tank, thereby improving the operating efficiency of the entire system.

[0009] Optionally, a fixing plate is provided at the bottom of the first gas storage tank and the second gas storage tank, and the length direction of the fixing plate is arranged along the length direction of the first gas storage tank; a bracket is provided at the bottom of the fixing plate, and the bracket is hinged to the fixing plate at one end of the fixing plate close to the second gas storage tank, the lifting assembly is located between the bracket and the fixing plate, and the lifting assembly is located at the center position of the fixing plate.

[0010] By adopting the above technical solution, the bracket supports the lifting component to complete the lifting of the fixed plate. The lifting component is located at the center of the fixed plate, so that the lifting component can achieve a larger rotation amount of the fixed plate with a smaller lifting amount, so that the space occupied by the lifting component is reduced, thereby reducing the volume of the entire device, making the device more practical.

[0011] Optionally, the lifting assembly includes a horizontally placed worm, a worm wheel cooperating with the worm is provided on one side of the worm, the worm wheel is perpendicular to the axis of the worm, and the worm wheel and the worm are both arranged on the bracket; a lead screw is coaxially provided inside the worm wheel, and the lead screw is lifted and lowered under the rotation of the worm wheel; the fixed plate rotates around the hinge axis under the action of the lead screw.

[0012] By adopting the above technical solution, the lifting transmission structure of the worm wheel, worm and lead screw is relatively compact, occupies less space, and has a simple design and reduces manufacturing costs. In addition, the lifting structure has good self-locking performance and can keep the position of the fixed plate stable.

[0013] Optionally, a slider is hinged at one end of the lead screw near the fixed plate, and a slide groove is provided on the fixed plate corresponding to the position of the lead screw. The direction of the slide groove is arranged along the length direction of the fixed plate, and the slider can slide in the slide groove.

[0014] By adopting the above technical solution, the slider is hinged at one end of the lead screw near the fixed plate and can slide in the slide groove on the fixed plate, thereby realizing the connection between the lead screw and the fixed plate. The design is simple and easy to implement. At the same time, when the slider slides in the slide groove, it can effectively share the force and pressure between the lead screw and the fixed plate, reduce friction and wear, and thus improve the reliability and service life of the structure.

[0015] Optionally, the first gas storage tank is provided with a pressure relief valve, which can automatically relieve pressure when the pressure in the first gas storage tank and the second gas storage tank is too high.

[0016] By adopting the above technical solution, the pressure relief valve can automatically release pressure when the internal pressure of the first gas storage tank is too high, so as to avoid the risk of explosion of the first gas storage tank. When the pressure exceeds the preset value, the pressure relief valve will open, release part of the gas, reduce the pressure to a safe level, and improve the safety of the device.

[0017] Optionally, the first gas storage tank is provided with a second exhaust valve, and the second exhaust valve can control the discharge of the gas in the first gas storage tank.

[0018] By adopting the above technical solution, the staff can manually control the opening and closing of the exhaust port of the first gas storage tank through the second exhaust valve. When inspecting and maintaining the compressor body, the second exhaust valve can be opened to release the pressure in the first gas storage tank through the exhaust port.

[0019] Optionally, an outer wall of the water conduit is provided with an electric heating wire.

[0020] By adopting the above technical solution, the heating wire ensures that the device can operate normally in cold weather. The heating wire is coated on the outer wall of the water pipe, and the water is prevented from freezing in the water pipe by heating, ensuring the smooth flow of the water pipe. The operation is simple and the reliability of the device is guaranteed.

[0021] Optionally, a heat-insulating layer is provided on the outer wall of the water pipe, and the heating wire is arranged inside the heat-insulating layer.

[0022] By adopting the above technical solution, the insulation layer provides heat insulation and heat preservation effect to prevent heat from being lost too quickly. The insulation layer covers the outside of the heating wire. After the heating wire is heated, the insulation layer can effectively reduce the conduction and radiation of heat, keep the temperature of the liquid in the pipeline stable, and reduce the number of heating times of the heating wire.

[0023] Optionally, a perforated plate is provided between the first gas storage tank and the second gas storage tank, and the perforated plate cover is provided on the periphery of the air guide pipe and the water guide pipe.

[0024] By adopting the above technical solution, the perforated plate covers the air duct and the water duct, thereby preventing the air duct and the water duct from being exposed, reducing the possibility of mechanical collision and damage to the pipeline, playing a role in protecting the pipeline and increasing the safety of the device.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. By using the first air storage tank, the second air storage tank and the air and water pipes connecting the two, the first air storage tank can continuously provide compressed air to the outside while the second air storage tank is draining water, thereby avoiding the shutdown operation of the ordinary compressor when draining water, and greatly improving the working efficiency of the compressor;

[0027] 2. Use the lifting assembly to lift the fixed plate away from the hinge shaft, so that the water in the first gas tank is completely introduced into the second gas tank through the water pipe, and then the waste water is completely discharged through the drain valve of the second gas tank. This can prevent residual water from occupying the gas storage space, thereby ensuring the gas storage capacity of the gas tank;

[0028] 3. The air duct, water duct and their valves are protected by covering them with perforated plates, which reduces the possibility of them being damaged by mechanical collision and extrusion, and improves the safety of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a screw compressor according to an embodiment of the present application.

[0030] Figure 2It is a schematic structural diagram of a protruding air duct of a screw compressor in an embodiment of the present application.

[0031] Figure 3 It is a structural schematic diagram of a protruding worm gear of a screw compressor in an embodiment of the present application.

[0032] Explanation of the reference numerals in the accompanying drawings: 1. compressor body; 11. motor; 2. first air storage tank; 21. pressure relief valve; 22. second exhaust valve; 3. second air storage tank; 31. first exhaust valve; 32. drain valve; 4. air guide pipe; 41. water guide pipe; 42. valve; 43. heating wire; 44. insulation layer; 5. three-way valve; 51. air outlet; 52. air supply port; 6. lifting assembly; 61. worm gear; 62. worm; 63. lead screw; 64. hand wheel; 65. connecting frame; 7. fixing plate; 71. slide groove; 72. slider; 8. bracket; 81. supporting leg; 9. punching plate. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-3 This application is described in further detail.

[0034] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0036] The present application discloses a screw compressor. Figure 1 and Figure 2A screw compressor includes a compressor body 1, a first air tank 2, a second air tank 3 and a motor 11 for driving the compressor body 1. The first air tank 2 and the second air tank 3 are coaxially placed horizontally, and the compressor body 1 and the motor 11 are located at the top of the first air tank 2 and connected to the first air tank 2 to provide compressed air for the first air tank 2. A horizontally arranged air pipe 4 and a water pipe 41 are connected between the adjacent ends of the first air tank 2 and the second air tank 3. The air pipe 4 is fixedly connected to the first air tank 2 near the top position, and the water pipe 41 is fixedly connected to the first air tank 2 near the bottom position. The outer wall of the water pipe 41 is covered with a heating wire 43 and a heat preservation layer 44. The heating wire 43 is located inside the heat preservation layer 44 to ensure that the water pipe 41 will not be frozen when the compressor is working in cold weather. Compressed gas and water can be exchanged between the first air tank 2 and the second air tank 3 through the air pipe 4 and the water pipe 41. Both the air pipe 4 and the water pipe 41 are provided with valves 42 for controlling the opening and closing of the pipes. The first gas tank 2 and the second gas tank 3 are provided with gas outlets 51 at adjacent positions on the top. The two gas outlets 51 are connected to the three-way valve 5, and the two gas outlets 51 are connected to the two inlets of the three-way valve 5. The outlet of the three-way valve 5 is the gas supply port 52 of the device, and the device delivers high-pressure gas to external equipment through the gas supply port 52. The second gas tank 3 is provided with a first exhaust valve 31 and a drain valve 32 at one end away from the water pipe 41. The first exhaust valve 31 is connected to the second gas tank 3 and is located near the top of the second gas tank 3. The drain valve 32 is connected to the second gas tank 3 and is located near the bottom of the second gas tank 3.

[0037] Reference Figure 1 The bottom of the first gas storage tank 2 and the second gas storage tank 3 are fixedly connected with a fixing plate 7 by bolts, and a U-shaped bracket 8 is arranged at the bottom of the fixing plate 7. The long side of the bracket 8 is arranged horizontally, and the short sides on both sides are arranged vertically. The fixing plate 7 is hinged to the end of the short side of the bracket 8 close to the second gas storage tank 3. When the fixing plate 7 is in a horizontal position, the bottom of the fixing plate 7 away from the second gas storage tank 3 is abutted against the other side end of the bracket 8. Four supporting legs 81 are fixed to the side of the bottom of the bracket 8 away from the fixing plate 7, and the supporting legs 81 are located at the four end corners of the bottom of the bracket 8. A lifting assembly 6 is arranged between the fixing plate 7 and the long side of the bracket 8, and the lifting assembly 6 can rotate the end of the fixing plate 7 away from the hinge point around the hinge axis, so that the liquid in the first gas storage tank 2 can flow into the second gas storage tank 3 through the water pipe 41.

[0038] Under normal circumstances, the compressed air and liquid between the first gas tank 2 and the second gas tank 3 are interconnected through the air pipe 4 and the water pipe 41, and the three-way valve 5 can be connected to any one of the two air outlets 51. When drainage is required, the lifting assembly 6 is used to raise one end of the fixing plate 7, so that the water in the first gas tank 2 can be completely introduced into the second gas tank 3 through the water pipe 41. The valves 42 of the water pipe 41 and the gas pipe 4 are closed respectively, and the pressure of the second gas tank 3 can be relieved and the water can be drained through the first exhaust valve 31 and the drain valve 32. At the same time, the three-way valve 5 connects the air supply port 52 with the air outlet 51 of the first gas tank 2, that is, during the drainage of the second gas tank 3, the first gas tank 2 can continuously provide compressed air, which greatly improves the working efficiency of the compressor.

[0039] Reference Figure 3 The lifting assembly 6 includes a horizontally placed worm 62, one side of which is horizontally meshed with a worm wheel 61 that matches the worm 62, the worm wheel 61 is perpendicular to the axis of the worm 62, and one end of the worm 62 is fixedly connected with a hand wheel 64. A connecting frame 65 is provided outside the abutment position of the worm wheel 61 and the worm 62, and the connecting frame 65 is fixed to the side of the bracket 8 close to the fixed plate 7. A lead screw 63 is coaxially provided inside the worm wheel 61, and the lead screw 63 is passed through the connecting frame 65. The inner surface of the worm wheel 61 is provided with a thread that matches the lead screw 63. A slider 72 is hinged at one end of the lead screw 63 away from the connecting frame 65, and a slide groove 71 along the length direction of the fixed plate 7 is provided at the center position of the fixed plate 7 close to the lead screw 63, and the slider 72 can slide in the slide groove 71. Turning the hand wheel 64, the worm 62 rotates to drive the worm wheel 61 to rotate, and the lead screw 63 is lifted and lowered under the rotation of the worm wheel 61. By lifting and lowering the lead screw 63, the slider 72 moves in the slide groove 71, so that the fixed plate 7 rotates around the hinge axis under the action of the lead screw 63. The rise of the end of the fixed plate 7 away from the hinge axis is conducive to the liquid in the first gas storage tank 2 entering the second gas storage tank 3 as completely as possible, and then the waste water is discharged through the drain valve 32 of the second gas storage tank 3. The complete discharge of waste water helps to increase the gas storage capacity of the gas storage tank, avoiding the phenomenon of repeated pressurization of the gas storage tank by the compressor.

[0040] Reference Figure 1The first gas storage tank 2 has two exhaust ports (not shown in the figure) at one end away from the water pipe 41, and the pressure relief valve 21 and the exhaust valve are fixed to the outside of the two exhaust ports. The pressure relief valve 21 can automatically relieve the pressure when the internal pressure of the first gas storage tank 2 is too high, so as to avoid the danger of the first gas storage tank 2 exploding due to excessive pressure. The exhaust valve can manually control the opening and closing of the exhaust port, so that the operator can actively exhaust the first gas storage tank 2. A punching plate 9 is provided between the first gas storage tank 2 and the second gas storage tank 3, and the inner sides of the punching plate 9 near the two ends are respectively abutted against the first gas storage tank 2 and the second gas storage tank 3, and the air pipe 4 and the water pipe 41 are covered inside the punching plate 9. It avoids the air pipe 4 and the water pipe 41 and their respective valves 42 from being exposed to the outside, reduces the possibility of mechanical collision and extrusion of the air pipe 4 and the water pipe 41, and increases the safety of the device.

[0041] The implementation principle of a screw compressor in the embodiment of the present application is as follows: Under normal working conditions, the valves 42 of the air pipe 4 and the water pipe 41 are opened, and the compressed air and liquid between the first air tank 2 and the second air tank 3 are interconnected through the air pipe 4 and the water pipe 41, and the three-way valve 5 is connected to any one of the two air outlets 51, and the device can realize the normal supply of compressed air. When drainage is required, the hand wheel 64 is rotated to make the screw 63 lift one end of the fixed plate 7, so that the water in the first air tank 2 is completely introduced into the second air tank 3 through the water pipe 41. After that, the valves 42 of the water pipe 41 and the air pipe 4 are closed respectively, and at the same time, the three-way valve 5 connects the air supply port 52 with the air outlet 51 of the first air tank 2. At this time, the second air tank 3 is completely disconnected from the first air tank 2, and the second air tank 3 can be depressurized and drained successively through the first exhaust valve 31 and the drain valve 32, and at the same time, the first air tank 2 can normally provide compressed air to the outside. When the pressure in the first air storage tank 2 is too high, the pressure relief valve 21 of the first air storage tank 2 will automatically relieve pressure. When the compressor body 1 needs to be repaired, the valves 42 of the water pipe 41 and the air pipe 4 are closed, so that the three-way valve 5 connects the air supply port 52 with the air outlet 51 of the second air storage tank 3, and the second air storage tank 3 can temporarily provide compressed air to the outside. At this time, the first air storage tank 2 can be manually relieved through the second exhaust valve 22, and the compressor body 1 can be repaired after the pressure relief is completed.

[0042] The embodiment of the present application has the effect of ensuring that the gas storage tank can continuously provide compressed gas to the outside during the drainage process.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A screw compressor, characterized in that: The invention comprises a compressor body (1), a first air storage tank (2), a second air storage tank (3), and a motor (11) for driving the compressor body (1) to operate; the first air storage tank (2) and the second air storage tank (3) are coaxially arranged horizontally; the compressor body (1) is located on the top of the first air storage tank (2) and is connected to the first air storage tank (2); An air guide pipe (4) and a water guide pipe (41) are connected between the first air storage tank (2) and the second air storage tank (3); the air guide pipe (4) is located near the top of the first air storage tank (2) and the second air storage tank (3); and the water guide pipe (41) is located near the bottom of the first air storage tank (2) and the second air storage tank (3); both the air guide pipe (4) and the water guide pipe (41) are provided with valves (42) for controlling the on-off of the pipes; The first gas storage tank (2) and the second gas storage tank (3) are both provided with gas outlets (51) at the top, and three-way valves (5) are provided at the two gas outlets (51) and are respectively connected to the two inlets of the three-way valve (5), and the outlet of the three-way valve (5) is a gas delivery port (52) for delivering pressurized gas to external equipment; The second gas storage tank (3) is provided with a first exhaust valve (31) and a drain valve (32) at one end away from the first gas storage tank (2); the first exhaust valve (31) is located near the top of the second gas storage tank (3) and is capable of controlling the exhaust of gas in the second gas storage tank (3); the drain valve (32) is located near the bottom of the second gas storage tank (3) and is capable of controlling the exhaust of liquid in the second gas storage tank (3); A lifting assembly (6) is provided at the bottom of the first gas storage tank (2) and the second gas storage tank (3), and the lifting assembly (6) is capable of lifting the first gas storage tank (2) away from one end of the second gas storage tank (3), thereby allowing the liquid in the first gas storage tank (2) to flow into the interior of the second gas storage tank (3).

2. A screw compressor according to claim 1, characterized in that: A fixing plate (7) is arranged at the bottom of the first gas storage tank (2) and the second gas storage tank (3), and the length direction of the fixing plate (7) is arranged along the length direction of the first gas storage tank (2); a bracket (8) is arranged at the bottom of the fixing plate (7), and the bracket (8) is hinged to the fixing plate (7) at one end of the fixing plate (7) close to the second gas storage tank (3); the lifting component (6) is located between the bracket (8) and the fixing plate (7), and the lifting component (6) is located at the center of the fixing plate (7).

3. A screw compressor according to claim 2, characterized in that: The lifting assembly (6) comprises a horizontally placed worm (62), a worm wheel (61) cooperating with the worm (62) being arranged on one side of the worm (62), the worm wheel (61) being perpendicular to the axis of the worm (62), and the worm wheel (61) and the worm (62) being both arranged on the bracket (8); a lead screw (63) being coaxially arranged inside the worm wheel (61), and the lead screw (63) being lifted and lowered under the rotation of the worm wheel (61); and the fixing plate (7) being rotated around the hinge axis under the action of the lead screw (63).

4. A screw compressor according to claim 3, characterized in that: A slider (72) is hingedly connected to one end of the lead screw (63) near the fixed plate (7); a slide groove (71) is provided on the fixed plate (7) at a position corresponding to the lead screw (63); the slide groove (71) is arranged along the length direction of the fixed plate (7); and the slider (72) can slide in the slide groove (71).

5. A screw compressor according to claim 1, characterized in that: The first gas storage tank (2) is provided with a pressure relief valve (21), and the pressure relief valve (21) can automatically relieve pressure when the pressure in the first gas storage tank (2) and the second gas storage tank (3) is too high.

6. A screw compressor according to claim 1, characterized in that: The first gas storage tank (2) is provided with a second exhaust valve (22), and the second exhaust valve (22) is capable of controlling the discharge of gas in the first gas storage tank (2).

7. A screw compressor according to claim 1, characterized in that: The outer wall of the water conduit (41) is provided with an electric heating wire (43).

8. A screw compressor according to claim 7, characterized in that: The outer wall of the water conduit (41) is provided with a heat-insulating layer (44), and the heating wire (43) is arranged inside the heat-insulating layer (44).

9. The screw compressor according to claim 1, characterized in that: A perforated plate (9) is provided between the first gas storage tank (2) and the second gas storage tank (3), and the perforated plate (9) is provided to cover the periphery of the air guide pipe (4) and the water guide pipe (41).

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