Exhaust system of gas compressor and gas compressor

Abstract

The utility model provides an exhaust system of a gas compressor and the gas compressor, the exhaust system comprises an exhaust pipeline, one end of the exhaust pipeline is connected with gas outlets of a plurality of machine heads, and the other end of the exhaust pipeline forms a gas supply end; the first end of the exhaust backflow pipeline is connected with the backflow port of the exhaust pipeline, and the second end of the exhaust backflow pipeline outputs backflow gas to the atmosphere or the air inlet of the corresponding machine head. When the compressor stops running or the amount of compressed gas generated by the compressor exceeds the required amount of a terminal user, redundant or all compressed gas in the exhaust pipeline flows back to a machine head or is directly discharged to the atmosphere through the exhaust backflow pipeline to be discharged; and undesired compressed gas is prevented from causing adverse effects on the exhaust pipeline, the machine head and other components.

Description

Technical Field

[0001] The present application belongs to the technical field of gas compressors, and in particular, relates to an exhaust system of a gas compressor and a gas compressor. Background Art

[0002] Gas compressors are widely used in various fields to provide users with gases of different pressures and / or flows to meet different needs of users. Limited by the maximum output gas volume of a single compressor head, when customers have a large gas volume demand, multiple heads need to be connected in parallel to provide a large flow of compressed air. However, when multiple heads are connected in parallel to supply gas, the amount of compressed gas in the exhaust pipeline will exceed the user's demand, affecting the continuous compression of the head and reducing the performance of the head. If the excessive gas volume cannot be discharged in time for a long time, it will also have a negative impact on the service life of the pipeline. When the machine is shut down, a certain amount of compressed gas will remain in the exhaust pipeline. If it cannot be discharged, it will also affect the pressure of the gas initially output to the user when the machine is turned on next time, and it will not meet the user's demand for gas with a specific pressure value. In addition, when the diameter of the exhaust pipeline is inconsistent with that of the compressed gas delivery pipeline, pressure drop loss usually occurs at the connection. Utility Model Content

[0003] In view of at least one of the above-mentioned technical problems existing in the prior art, an embodiment of the present application provides an exhaust system of a gas compressor and a gas compressor.

[0004] The technical solution adopted in the embodiment of the present application is: an exhaust system of a gas compressor, the gas compressor having a plurality of heads connected in parallel, the exhaust system comprising:

[0005] An exhaust pipeline, the inlet of which is respectively connected to the air outlets of the plurality of machine heads, and the outlet of which forms an air supply end;

[0006] An exhaust gas return pipeline has a first end connected to the return port of the exhaust pipeline and a second end outputting the return gas to the atmosphere or the air inlet of the corresponding machine head.

[0007] In an optional embodiment, the exhaust return pipe includes a main pipe and at least one branch pipe, the first end of the main pipe is connected to the return port of the exhaust pipe, the second end of the main pipe is connected one-to-one with the first end of the branch pipe, and the second end of the branch pipe is connected one-to-one with the air inlet of the machine head.

[0008] In an optional embodiment, a plurality of bends are formed on the main pipe and / or the branch pipe to adapt to the cabin space of the gas compressor.

[0009] In an optional embodiment, an air intake valve is respectively provided on the air intake port of each of the machine heads, and the second ends of the exhaust gas return pipelines are respectively connected to the air intake valves in a one-to-one correspondence.

[0010] In an optional embodiment, the intake valve has a reflux chamber and an intake chamber, and an exhaust muffler is provided on the intake valve. A valve plate is provided in the reflux chamber, and the valve plate can move under the action of the reflux gas so that the reflux chamber is selectively connected to the intake chamber or the exhaust muffler.

[0011] In an optional embodiment, the valve plate has a first position and a second position in the reflux chamber. When the valve plate is in the first position, the reflux chamber is connected to the air inlet chamber, and the connection between the reflux chamber and the exhaust muffler is cut off, so that the reflux gas enters the machine head through the air inlet chamber to continue compression; when the valve plate is in the second position, the reflux chamber is connected to the exhaust muffler, and the connection between the reflux chamber and the air inlet chamber is cut off, so that the reflux gas is discharged into the atmosphere after being silenced by the exhaust muffler.

[0012] In an optional embodiment, the head includes a first head and a second head.

[0013] In an optional embodiment, the exhaust pipeline includes a three-way connecting pipe, the first end of the first pipe of the three-way connecting pipe is connected to the air outlet of the first head, the first end of the second pipe of the three-way connecting pipe is connected to the air outlet of the second head, the first end of the third pipe of the three-way connecting pipe forms the air supply end, and the second ends of the first pipe, the second pipe and the third pipe are connected.

[0014] In an optional embodiment, the inner diameter of the first pipe and / or the second pipe gradually increases or decreases from the first end to the second end to form a truncated cone. In an optional embodiment, the inner diameter of the first pipe and / or the second pipe in the first direction gradually increases from the first end to the second end; the inner diameter of the first pipe and / or the second pipe in the second direction gradually increases or decreases from the first end to the second end;

[0015] The first direction is parallel to the direction of gas flow in the third pipeline, the second direction is perpendicular to the direction of gas flow in the third pipeline, and the first direction is perpendicular to the second direction.

[0016] In an optional embodiment, the first pipe and / or the second pipe gradually and smoothly extends from the first end to the second end thereof toward the third pipe along the gas flow direction, and the pipe wall shape of the first pipe and / or the second pipe is streamlined.

[0017] In an optional embodiment, the curvature of the tube wall of the first tube and / or the second tube on a side close to the third tube gradually decreases from the first end to the second end.

[0018] In an optional embodiment, a first cooler is provided between the air outlet of the first head and the first end of the first pipe of the three-way connecting pipe; and / or

[0019] A second cooler is provided between the air outlet of the second head and the first end of the second pipeline of the three-way connecting pipe.

[0020] In an optional embodiment, a pressure relief port is provided on the three-way connecting pipe, and a pressure relief safety valve is provided on the pressure relief port.

[0021] A gas compressor comprises the exhaust system of the gas compressor described in any one of the above embodiments.

[0022] Compared with the prior art, the beneficial effect of the embodiment of the present application is that the exhaust system of the embodiment of the present application can discharge the excess or all compressed gas in the exhaust pipeline by returning it to the machine head through the exhaust return pipeline or directly discharging it into the atmosphere, thereby avoiding unnecessary compressed gas from adversely affecting the exhaust pipeline, the machine head and other components, and further affecting the compression operation of the subsequent compressor.

[0023] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application.

[0024] The overview of various implementations or examples of the technology described in this application is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The drawings generally illustrate various embodiments by way of example and not limitation, and together with the description and claims, serve to illustrate the disclosed embodiments. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the exhaust system of an embodiment of the present application used for a gas compressor.

[0027] Figure 2 It is a schematic diagram of the connection structure between the exhaust return pipeline and the machine head in an embodiment of the present application.

[0028] Figure 3 This is a schematic diagram of the structure of a three-way connecting pipe in an embodiment of the present application.

[0029] Figure 4 Another structural schematic diagram of the three-way connecting pipe in the embodiment of the present application.

[0030] Figure 5 for Figure 4 Right view of .

[0031] Reference numerals:

[0032] 1- three-way connecting pipe; 11- first pipeline; 12- second pipeline; 13- third pipeline; 14- reflux port; 15- pressure relief port; 16- flange;

[0033] 2-exhaust reflux pipeline; 21-main pipe; 22-branch pipe; 23-hoop; 24-first air inlet valve; 241-first reflux chamber; 25-second air inlet valve; 251-second reflux chamber; 26-first exhaust muffler; 27-second exhaust muffler;

[0034] 4-first machine head; 5-second machine head; 6-check valve; 7-safety valve; 8-first cooler; 9-first muffler. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the present application clearer, the technical solution of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. "First", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] In order to keep the following description of the embodiments of the present application clear and concise, the present application omits detailed descriptions of known functions and known components.

[0038] The present application embodiment provides an exhaust system for a gas compressor, such as Figure 1 and Figure 2As shown, the exhaust system includes an exhaust pipeline and an exhaust return pipeline 2. One end of the exhaust pipeline is respectively connected to the air outlets of multiple machine heads, and the other end forms a gas supply end, through which the compressed gas generated by the machine heads can be output to the outside. For example, the gas supply end is connected to the user pipeline to provide compressed gas to the end user to meet the gas demand of the end user. The exhaust return pipeline 2 includes a main pipe 21 and a plurality of branch pipes 22. The first end of the main pipe 21 is connected to the exhaust pipeline, and the second end of the main pipe 21 is connected to the first ends of the plurality of branch pipes 22 one by one. The second ends of the plurality of branch pipes 22 are used to output the return gas to the atmosphere or the air inlet of the corresponding machine head.

[0039] The exhaust system of the embodiment of the present application can discharge the excess or all compressed gas in the exhaust pipeline by returning it to the machine head or directly discharging it into the atmosphere through the exhaust return pipeline 2 when the compressor stops running or the amount of compressed gas generated by the compressor exceeds the required amount of the end user, so as to avoid the undesired compressed gas from causing adverse effects on the exhaust pipeline and the machine head and other components, thereby affecting the subsequent compression operation of the compressor. The compressed gas can be silenced before being directly discharged into the atmosphere.

[0040] The connection method between the main pipe 21 and the branch pipe 22 is not limited, as long as the stability and sealing of the entire pipeline after connection can be guaranteed, and this application does not make any specific restrictions on this. Figure 2 As shown, the main pipe 21 and at least one branch pipe 22 are connected by a clamp 23. The clamp 23 is convenient to connect and has good fastness, thereby avoiding leakage at the connection. Furthermore, the clamp 23 can be a Victoria clamp 23 to reduce the difficulty of processing and installation, while reducing costs.

[0041] The main pipe 21 and / or the branch pipe 22 may be in a non-straight pipe form to solve the problem that the straight pipe cannot effectively utilize the irregular space and brings inconvenience to the installation. In some embodiments, for example, the main pipe 21 and / or the branch pipe 22 are formed with multiple bends to adapt to the cabin space of the gas compressor. In this way, the corner space can be effectively utilized, the space occupied by the pipeline is reduced, and the volume of the whole machine is reduced.

[0042] In some embodiments, the exhaust gas return line 2 includes a plurality of branch pipes 22, and the number of the branch pipes 22 is the same as the number of the machine heads and corresponds one to one. Figure 1 and Figure 2 As shown, an intake valve is provided on the intake pipeline of each head, and the intake valve is used to control whether the gas to be compressed (for example, ambient gas) is sent into the head for compression through the intake pipeline. The second ends of the plurality of branch pipes 22 are connected to the intake valves one by one, see Figure 2In this way, the excess compressed gas in the exhaust pipeline can be returned to the corresponding air intake valve of the head through each branch pipe 22, so as to effectively utilize the compressed gas, increase the pressure of the compressed gas entering the head, improve the efficiency of the compressor, and avoid direct discharge into the atmosphere to cause waste.

[0043] The number of heads of the gas compressor used in the exhaust system of the present application is two or more, which can be determined according to the amount of compressed gas to be output and the gas consumption of the end user. Figure 1 and Figure 2 As shown, the head of the gas compressor includes a first head 4 and a second head 5. The first head 4 and the second head 5 are connected in parallel, which can provide more gas volume to meet the user's demand for large gas volume.

[0044] The pressure of the compressed gas discharged by the first head 4 and the second head 5 can be the same or different. One of the first head 4 and the second head 5 can be a high-pressure head, and the other can be a low-pressure head, or both can be high-pressure heads or low-pressure heads. When the first head 4 and the second head 5 are both low-pressure heads, the gas compressor can continuously output about 11,500 cubic meters of clean, oil-free compressed gas per hour at a pressure of 1.5 to 2 bar, which can meet the end user's gas requirements for low-pressure and large volumes.

[0045] Each intake valve has a reflux chamber and an intake chamber. An exhaust muffler is also provided on the intake valve. A valve plate is provided in the reflux chamber. The valve plate can move under the action of the reflux gas to selectively connect the reflux chamber with the intake chamber or the exhaust muffler.

[0046] For example, Figure 2As shown, when the machine head includes the first machine head 4 and the second machine head 5, the second end of the main pipe 21 is connected to the first ends of the two branch pipes 22 respectively, and the second ends of the two branch pipes 22 are connected to the first intake valve 24 and the second intake valve 25 respectively. The first intake valve 24 is arranged on the intake pipeline of the first machine head 4, and the second intake valve 25 is arranged on the intake pipeline of the second machine head 5. The first intake valve 24 has a first reflux chamber 241 and a first intake chamber (not shown in the figure), and a first valve plate (not shown in the figure) is arranged in the first reflux chamber 241. The first intake valve 24 is also provided with a first exhaust muffler 26. The first valve plate can move under the action of the reflux gas entering the first reflux chamber 241, and has a first position and a second position. When the first valve plate is in the first position, the first reflux chamber 241 is connected with the first air inlet chamber, and the connection between the first reflux chamber 241 and the first exhaust muffler 26 is cut off, so that the reflux gas enters the first machine head 4 to continue compression; when the first valve plate is in the second position, the first reflux chamber 241 is connected with the first exhaust muffler 26, and the connection between the first reflux chamber 241 and the first air inlet chamber is cut off, so that the reflux gas is discharged into the atmosphere after being silenced by the first exhaust muffler 26. The first valve plate can be switched between the first position and the second position according to the reflux gas pressure and the compressor speed, so that the reflux gas can selectively enter the first exhaust muffler 26 or the first air inlet chamber.

[0047] Continue to combine Figure 2 The second air intake valve 25 has a second reflux chamber 251 and a second air intake chamber (not shown in the figure), and a second valve plate (not shown in the figure) is arranged in the second air intake valve 25. A second exhaust muffler 27 is also arranged on the second air intake valve 25. The second valve plate can move under the action of the reflux gas entering the second reflux chamber 251, and has a third position and a fourth position. When the second valve plate is in the third position, the second reflux chamber 251 is connected with the second air intake chamber, and the connection between the second reflux chamber 251 and the second exhaust muffler 27 is cut off, so that the reflux gas enters the second machine head 5 to continue compression; when the second valve plate is in the fourth position, the second reflux chamber 251 is connected with the second exhaust muffler 27, and the connection between the second reflux chamber 251 and the second air intake chamber is cut off, so that the reflux gas is discharged into the atmosphere after being silenced by the first exhaust muffler 26. The second valve plate can be switched between the third position and the third position according to the pressure of the reflux gas and the speed of the compressor, so that the reflux gas can selectively enter the second exhaust muffler 27 or the second air intake chamber.

[0048] For example, when the pressure of the reflux gas is between 1.5 and 2 bar, and the speed of the compressor is greater than 0, the first valve plate is in the first position, the second valve plate is in the third position, and the reflux gas entering the first reflux chamber 241 and the second reflux chamber 251 through the exhaust reflux pipeline 2 enters the first air intake chamber and the second air intake chamber respectively, and then enters the first head 4 and the second head 5 respectively for further compression. When the speed of the compressor is 0, the first valve plate is in the second position, the second valve plate is in the fourth position, and the reflux gas entering the first reflux chamber 241 and the second reflux chamber 251 through the exhaust reflux pipeline 2 enters the first exhaust muffler 26 and the second exhaust muffler 27 respectively, and is discharged into the atmosphere after being silenced by the exhaust muffler. When the pressure of the reflux gas is less than 1.5 or greater than 2 bar, and is not suitable for recompression for recycling, the reflux gas will control the first valve plate and the second valve plate to be in the second position and the fourth position respectively, so that the reflux gas enters the first exhaust muffler 26 and the second exhaust muffler 27 respectively for silencing and then is discharged into the atmosphere.

[0049] In some embodiments, the exhaust line includes a three-way connecting pipe 1, see Figure 3 and Figure 4 The three-way connecting pipe 1 includes a first pipe 11, a second pipe 12 and a third pipe 13. The first end of the first pipe 11 of the three-way connecting pipe 1 is connected to the gas outlet of the first head 4, the first end of the second pipe 12 of the three-way connecting pipe 1 is connected to the gas outlet of the second head 5, and the first end of the third pipe 13 of the three-way connecting pipe 1 forms a gas supply end. The second end of the first pipe 11, the second end of the second pipe 12 and the second end of the third pipe 13 are connected. In this way, the compressed gas generated by the compression of the first head 4 and the second head 5 can be combined together through the three-way connecting pipe 1, and output to the outside through the same gas supply end to provide to the user.

[0050] It can be understood that the first end of the first pipe 11 of the three-way connecting pipe 1 and the air outlet of the first head 4 can be connected by directly docking, or a pipeline can be set between the two to achieve communication between the two, which can be determined specifically according to the distance between the first end of the first pipe 11 and the air outlet of the first head 4. Similarly, the first end of the second pipe 12 of the three-way connecting pipe 1 and the air outlet of the second head 5 can be connected by directly docking, or a pipeline can be set between the two to achieve communication between the two, which can be determined specifically according to the distance between the first end of the second pipe 12 and the air outlet of the second head 5. The first end of the third pipe 13 of the three-way connecting pipe 1 can be connected to the user pipeline, and the compressed gas generated by the two heads can be transported to the user pipeline together through the third pipeline 13 to provide the user with the required compressed gas.

[0051] In order to adapt to the air outlet of the first head 4 and the air outlet of the second head 5, or to adapt to the pipeline connected to the air outlet of the first head 4 and the pipeline connected to the air outlet of the second head 5, the inner diameter of the first pipe and / or the second pipe can be designed to gradually increase or decrease from the first end to the second end, and the increase or decrease of the inner diameter of the first pipe and / or the second pipe in different directions from the first end to the second end can be the same or different.

[0052] In some embodiments, the inner diameter of the first pipe 11 and / or the second pipe 12 gradually increases from its first end to its second end, so that the first pipe 11 and / or the second pipe 12 form an approximately truncated cone shape. In this case, the inner cavity shape intercepted by the first pipe 11 and / or the second pipe 12 along its radial cross section is circular, the inner diameter of the inner cavity is the same in all directions, and the inner diameter of the inner cavity gradually increases from its first end to its second end. The caliber of the first end of the first pipe 11 and / or the second pipe 12 connected to the air outlet of the first head 4 and the second head 5 (including direct connection or indirect connection) is larger than the caliber of the second end connected to the three-way connecting pipe 1, which can not only make the compressed gas generated by the first head 4 and the second head 5 smoothly discharged into the three-way connecting pipe 1, reduce pressure drop and noise, and improve the efficiency of the compressor, but also can reasonably distribute the mass flow of the exhaust of the first head 4 and the exhaust of the second head 5.

[0053] The first pipe 11 may be in a truncated cone shape or in a curved pipe shape, such as Figure 4 As shown, the first pipe 11 is a curved pipe, and the first pipe 11 gradually and smoothly extends from its first end to its second end along the gas flow direction toward the third pipe 13, and the pipe wall shape of the first pipe 11 is streamlined. In this way, the compressed gas sent out from the gas outlet of the first head 4 can be guided to smoothly enter the third pipe 13 along the streamlined first pipe 11, thereby reducing the pressure drop.

[0054] Similarly, the second pipe 12 can also be designed as a curved pipe, and the second pipe 12 gradually and smoothly extends toward the third pipe 13 from its first end to its second end along the gas flow direction, and the pipe wall shape of the second pipe 12 is streamlined to reduce pressure drop.

[0055] In some embodiments, the inner diameter of the first pipe 11 and / or the second pipe 12 in the first direction gradually increases from the first end to the second end thereof, and the inner diameter of the first pipe 11 and / or the second pipe 12 in the second direction gradually increases or decreases from the first end to the second end thereof; wherein the first direction is parallel to the direction of gas flow in the third pipe 13, the second direction is perpendicular to the direction of gas flow in the third pipe 13, and the first direction is perpendicular to the second direction.

[0056] Exemplarily, the first pipeline 11 is Figure 4 The inner diameter in the first direction indicated by the middle arrow gradually increases from the first end to the second end. Figure 5 The inner diameter in the second direction indicated by the middle arrow gradually decreases from the first end to the second end.

[0057] Of course, the first pipeline 11 is Figure 5 The inner diameter in the second direction indicated by the middle arrow may also gradually increase from the first end to the second end. Further, when the first pipe 11 and the second pipe 12 are curved pipes, the curvature of the pipe wall of the first pipe 11 and the second pipe 12 on the side close to the third pipe 13 gradually decreases from the first end to the second end. Not only can the first pipe 11 and the second pipe 12 be smoothly transitioned with the third pipe 13 at the connection, but also the distance between the second end and the third pipe 13 can meet the requirements of assembly while ensuring that the first pipe 11 and the second pipe 12 are streamlined.

[0058] The first pipeline 11 and / or the second pipeline 12 is streamlined in design. The connections between the first pipeline 11 and the second pipeline 12 and the third pipeline 13 are smoothly transitioned, eliminating right-angle transitions, preventing the generation of vortices, reducing pressure drop, and eliminating backflow and vortices in the overall flow, ultimately reducing the pressure drop from the first end of the first pipeline 11 and the first end of the second pipeline 12 to the first end of the third pipeline 13 by 86% and 98.6%, respectively.

[0059] The three-way connecting pipe 1 can be processed by casting in one piece. Figure 3 As shown, flanges 16 can be provided on the ports of the first ends of the first pipeline 11, the second pipeline 12 and the third pipeline 13, respectively, to facilitate connection with the air outlet of the machine head and the user pipeline, respectively.

[0060] In some embodiments, a first cooler 8 is provided between the gas outlet of the first head 4 and the first end of the first pipe 11 of the three-way connecting pipe 1. A second cooler is provided between the gas outlet of the second head 5 and the first end of the second pipe 12 of the three-way connecting pipe 1. The compressed high-temperature gas is quickly cooled by the cooler to remove water vapor and condensate, and to prevent the high-temperature gas from condensing and condensing to cause corrosion and thermal damage to the pipeline and equipment, so as to protect the equipment.

[0061] When a first cooler 8 and a second cooler are provided, the first end of the first pipe 11 of the three-way connecting pipe 1 is connected to the exhaust pipe of the first cooler 8, the inner diameter at the first end of the first pipe 11 needs to be the same as the inner diameter of the exhaust pipe of the first cooler 8, the inner diameter of the second end of the first pipe 11 is the same as the inner diameter of the third pipe 13, when the inner diameter of the exhaust pipe is larger than the inner diameter of the third pipe 13, the inner diameter of the first pipe 11 gradually decreases from its first end to its second end, and when the inner diameter of the exhaust pipe is smaller than the inner diameter of the third pipe 13, the inner diameter of the first pipe 11 gradually increases from its first end to its second end.

[0062] Similarly, the first end of the second pipe 12 of the three-way connecting pipe 1 is connected to the exhaust pipe of the second cooler. The inner diameter at the first end of the second pipe 12 needs to be the same as the inner diameter of the exhaust pipe of the second cooler. The inner diameter of the second end of the second pipe 12 is the same as the inner diameter of the third pipe 13. When the inner diameter of the exhaust pipe is larger than the inner diameter of the third pipe 13, the inner diameter of the second pipe 12 gradually decreases from its first end to its second end. When the inner diameter of the exhaust pipe is smaller than the inner diameter of the third pipe 13, the inner diameter of the second pipe 12 gradually increases from its first end to its second end.

[0063] like Figure 3 and Figure 4 As shown, the third pipe 13 of the three-way connecting pipe 1 is provided with a return port 14, and the return port 14 is connected to the first end of the main pipe 21 of the exhaust return pipeline 2. By providing the return port 14, it is convenient to connect the exhaust return pipeline 2 to the three-way connecting pipe 1.

[0064] Continue to combine Figure 3 and Figure 4 The third pipe 13 of the three-way connecting pipe 1 is provided with a pressure relief port 15, and the pressure relief port 15 is used to set the pressure relief safety valve 7. When the pressure in the three-way connecting pipe 1 is greater than the preset pressure value, the pressure is relieved through the pressure relief safety valve 7. Figure 1 and Figure 2 As shown, the embodiment of the present application further provides a compressor, which includes multiple heads connected in parallel and the exhaust system in any of the above embodiments. The multiple heads can be driven by the same motor or by different motors in a one-to-one correspondence.

[0065] The compressor of the present application can meet the customer's demand for large air volume due to the use of multiple heads in parallel; at the same time, due to the provision of an exhaust return pipeline 2, excess compressed gas can be recycled and utilized, thereby saving the user's economic cost.

[0066] The loading and unloading process of the gas circuit of the first head 4 and the second head 5 of the gas compressor is described below:

[0067] The air circuit loading operation process of the first machine head 4 is as follows: the first air intake valve 24 on the air intake pipeline of the first machine head 4 is in an open state, and the compressed gas passes through the first air intake valve 24 into the first machine head 4 for compression, and the compressed hot air passes through the first muffler 9 into the first cooler 8, and then enters the first end of the first pipeline of the three-way connecting pipe 1 at the outlet of the first cooler 8, and merges with the compressed gas entering from the first end of the second pipeline of the three-way connecting pipe 1 from the second machine head 5 in the three-way connecting pipe 1, and then enters the user pipeline through the one-way valve 6 and the compensator;

[0068] The gas circuit loading operation process of the second machine head 5 is as follows: the second air intake valve 25 on the air intake pipeline of the second machine head 5 is in an open state, and the compressed gas passes through the second air intake valve 25 into the second machine head 5 for compression, and the compressed hot air passes through the second muffler (not shown in the figure) into the second cooler, and then enters the first end of the second pipeline 12 of the three-way connecting pipe 1 at the outlet of the second cooler, and merges with the compressed gas entering from the first end of the first pipeline 11 of the three-way connecting pipe 1 from the first machine head 4 in the three-way connecting pipe 1, and then enters the user pipeline through the one-way valve 6 and the compensator;

[0069] The air path unloading operation process of the first machine head 4: the first air intake valve 24 on the air intake pipeline of the first machine head 4 is in a closed state, and the gas that has previously entered the first machine head 4 through the first air intake valve 24 is compressed, and the compressed hot air enters the first cooler 8 through the first muffler 9, and then enters the first end of the first pipe 11 of the three-way connecting pipe 1 at the outlet of the first cooler 8, and merges with the compressed gas entering from the second machine head 5 through the first end of the second pipe 12 of the three-way connecting pipe 1 in the three-way connecting pipe 1, and then enters the first air intake valve 24 and the second air intake valve 25 respectively through the return port 14 through the exhaust return pipeline 2, and then enters the first machine head 4 and the second machine head 5 respectively to continue to be compressed or be discharged into the atmosphere after being silenced by the exhaust muffler.

[0070] The air path unloading operation process of the second machine head 5: the second air intake valve 25 on the air intake pipeline of the second machine head 5 is in a closed state, and the gas that has previously entered the second machine head 5 through the second air intake valve 25 is compressed, and the compressed hot air enters the second cooler through the second muffler, and then enters the first end of the second pipe 12 of the three-way connecting pipe 1 at the outlet of the second cooler, and merges with the compressed gas entering from the first end of the first pipe 11 of the three-way connecting pipe 1 from the first machine head 4 in the three-way connecting pipe 1, and then enters the first air intake valve 24 and the second air intake valve 25 respectively through the return port 14 through the exhaust return pipeline 2, and then enters the first machine head 4 and the second machine head 5 respectively to continue to be compressed or be discharged into the atmosphere after being silenced by the exhaust muffler.

[0071] The above description is intended to be illustrative rather than restrictive, and those skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more of them) may be used in combination with each other, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations.

Claims

1. An exhaust system for a gas compressor, wherein the gas compressor has a plurality of heads connected in parallel, characterized in that: The exhaust system comprises: An exhaust pipeline, the inlet of which is respectively connected to the air outlets of the plurality of machine heads, and the outlet of which forms an air supply end; An exhaust gas return pipeline has a first end connected to the return port of the exhaust pipeline and a second end outputting the return gas to the atmosphere or the air inlet of the corresponding machine head.

2. The exhaust system according to claim 1, characterized in that The exhaust return pipe includes a main pipe and at least one branch pipe, the first end of the main pipe is connected to the return port of the exhaust pipe, the second end of the main pipe is connected one-to-one with the first end of the branch pipe, and the second end of the branch pipe is connected one-to-one with the air inlet of the machine head.

3. The exhaust system according to claim 2, characterized in that: The main pipe and / or the branch pipe are formed with multiple bends to adapt to the cabin space of the gas compressor.

4. The exhaust system according to claim 1, characterized in that An air intake valve is respectively arranged on the air intake port of each of the machine heads, and the second ends of the exhaust gas return pipelines are respectively connected to the air intake valves in a one-to-one correspondence.

5. The exhaust system according to claim 4, characterized in that The intake valve has a reflux chamber and an intake chamber, and an exhaust muffler is provided on the intake valve. A valve plate is provided in the reflux chamber, and the valve plate can move under the action of the reflux gas to make the reflux chamber selectively connected to the intake chamber or the exhaust muffler.

6. The exhaust system according to claim 5, characterized in that The valve plate has a first position and a second position in the reflux chamber. When the valve plate is in the first position, the reflux chamber is connected with the air inlet chamber, and the connection between the reflux chamber and the exhaust muffler is cut off, so that the reflux gas enters the machine head through the air inlet chamber to continue compression; when the valve plate is in the second position, the reflux chamber is connected with the exhaust muffler, and the connection between the reflux chamber and the air inlet chamber is cut off, so that the reflux gas is discharged into the atmosphere after being silenced by the exhaust muffler.

7. The exhaust system according to any one of claims 1 to 6, characterized in that: The head includes a first head and a second head.

8. The exhaust system according to claim 7, characterized in that The exhaust pipeline includes a three-way connecting pipe, the first end of the first pipe of the three-way connecting pipe is connected to the air outlet of the first head, the first end of the second pipe of the three-way connecting pipe is connected to the air outlet of the second head, the first end of the third pipe of the three-way connecting pipe forms the air supply end, and the second ends of the first pipe, the second pipe and the third pipe are connected.

9. The exhaust system according to claim 8, characterized in that The inner diameter of the first pipe and / or the second pipe gradually increases or decreases from the first end to the second end thereof to form a truncated cone shape.

10. The exhaust system according to claim 8, characterized in that The first pipeline and / or the second pipeline smoothly extends from the first end to the second end thereof along the gas flow direction toward the third pipeline, and the pipe wall shape of the first pipeline and / or the second pipeline is streamlined.

11. The exhaust system according to claim 10, characterized in that The inner diameter of the first pipeline and / or the second pipeline in the first direction gradually increases from the first end to the second end; the inner diameter of the first pipeline and / or the second pipeline in the second direction gradually increases or decreases from the first end to the second end; The first direction is parallel to the direction of gas flow in the third pipeline, the second direction is perpendicular to the direction of gas flow in the third pipeline, and the first direction is perpendicular to the second direction.

12. The exhaust system according to claim 10, characterized in that The curvature of the tube wall of the first tube and / or the second tube on the side close to the third tube gradually decreases from the first end to the second end.

13. The exhaust system according to claim 8, characterized in that A first cooler is provided between the air outlet of the first head and the first end of the first pipe of the three-way connecting pipe; and / or a second cooler is provided between the air outlet of the second head and the first end of the second pipe of the three-way connecting pipe.

14. The exhaust system according to claim 8, characterized in that The three-way connecting pipe is provided with a pressure relief port, and the pressure relief port is provided with a pressure relief safety valve.

15. A gas compressor, characterized in that: An exhaust system comprising the exhaust system of any one of claims 1 to 14.

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