Double-host exhaust structure

Abstract

The utility model relates to the technical field of air compressors, in particular to a double-main-machine exhaust structure which comprises a first main machine, a second main machine, an exhaust valve assembly, an inner sleeve exhaust pipe and an outer sleeve exhaust pipe. An inner air inlet and an inner air outlet are formed in the two ends of the inner sleeve exhaust pipe respectively, and an inner flow guide cavity is formed in the inner sleeve exhaust pipe; an outer air inlet and an outer air outlet are formed in the two ends of the outer sleeve exhaust pipe correspondingly, a side air inlet and a side air outlet are formed in the outer pipe face of the outer sleeve exhaust pipe, and an outer flow guide cavity is formed in the outer sleeve exhaust pipe. The outer sleeve exhaust pipe sleeves the outer pipe surface of the inner sleeve exhaust pipe through the outer air inlet, and the outer air inlet is hermetically connected with the outer pipe surface of the inner sleeve exhaust pipe through the annular plugging plate; the exhaust end of the first host is communicated with the inner air inlet, the exhaust end of the second host is communicated with the side air inlet, and the exhaust valve assembly is communicated with the side exhaust port; the outer sleeve exhaust pipe is provided with a total sensor assembly. According to the utility model, the problems of airflow hedging, backpressure unbalance and working condition dispersion during parallel operation of the existing double hosts can be solved.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, and in particular to a dual-main-unit exhaust structure. Background Technology

[0002] Dual-unit parallel air compressor systems are commonly used to improve air supply stability and redundancy, but they face multiple technical bottlenecks in actual operation. When two compressors are connected in parallel, differences in the dynamic characteristics of the air path can easily lead to back pressure imbalance due to airflow collisions, causing frequent start-stops or asynchronous loading of the compressors, severely affecting system stability. Simultaneously, abrupt changes in pipe cross-sectional area and flow velocity differences at the exhaust end convergence point can easily create turbulent backflow, resulting in significant exhaust energy loss. Furthermore, asymmetry in main pipe length, number of bends, and valve configuration further exacerbates the dispersion of the operating points of the two compressors—the actual operating pressure can deviate from the design value by 10%-15%, leading to a decrease in single-unit efficiency. It is worth noting that in traditional designs, each compressor requires an independent check valve; its bidirectional blocking characteristics not only increase exhaust back pressure but also exacerbate energy waste due to the valve's throttling effect. These combined problems reduce the overall system energy efficiency by approximately 20%, while frequent pressure fluctuations accelerate compressor wear and significantly shorten equipment lifespan. Utility Model Content

[0003] The purpose of this invention is to propose a dual-main exhaust structure to solve the problems of airflow collision, back pressure imbalance and operating condition dispersion in the existing dual-main exhaust system.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A dual-main exhaust structure includes a first main unit, a second main unit, an exhaust sleeve, and an exhaust valve assembly;

[0006] The exhaust sleeve includes an inner exhaust pipe and an outer exhaust pipe;

[0007] The two ends of the inner exhaust pipe are an inner air inlet and an inner exhaust outlet, respectively. The inner air inlet and the inner exhaust outlet are connected, and the connecting space between the inner air inlet and the inner exhaust outlet is an inner flow guide cavity.

[0008] The outer exhaust pipe has an external air inlet and an external exhaust outlet at its two ends. The outer surface of the outer exhaust pipe has a side air inlet and a side exhaust outlet. The side air inlet is located close to the external air inlet, and the side exhaust outlet is located close to the external exhaust outlet. The external air inlet, the external exhaust outlet, the side air inlet, and the side exhaust outlet are connected to each other, and the connecting space between the external air inlet, the external exhaust outlet, the side air inlet, and the side exhaust outlet is an external flow guide cavity.

[0009] The outer exhaust pipe is fitted onto the outer surface of the inner exhaust pipe through the outer air inlet. The outer air inlet is sealed to the outer surface of the inner exhaust pipe through an annular sealing plate. The inner air inlet is exposed outside the outer exhaust pipe, and the inner exhaust port is built into the outer exhaust pipe.

[0010] The exhaust end of the first host is connected to the inner air inlet through a first connecting pipe, the exhaust end of the second host is connected to the side air inlet through a second connecting pipe, and the exhaust valve assembly is connected to the side exhaust port.

[0011] The outer surface of the outer casing exhaust pipe is equipped with a total sensor assembly, and the exhaust valve is used to open or close according to the sensing information of the total sensor assembly to prevent gas backflow.

[0012] Preferably, the total sensor assembly includes a total exhaust temperature sensor and a total exhaust pressure sensor;

[0013] The exhaust valve assembly includes an exhaust pipe and an electrically adjustable valve mounted on the exhaust pipe;

[0014] The vent pipe connects the external guide cavity to the outside air, and the electric regulating valve is used to control the flow and closure of the vent pipe.

[0015] Preferably, the internal air inlet is equipped with a check valve.

[0016] Preferably, the first connecting pipe includes a first vertical sub-pipe, a first curved pipe, and a first horizontal sub-pipe connected in sequence;

[0017] One end of the first vertical sub-tube is connected to the exhaust end of the first main unit. The first vertical sub-tube and the exhaust sleeve are arranged vertically. The first horizontal sub-tube and the exhaust sleeve are arranged horizontally. One end of the first horizontal sub-tube is connected to the inner air inlet of the exhaust sleeve.

[0018] Preferably, a solenoid valve, a first temperature sensor, and a first pressure sensor are installed on the first vertical sub-tube.

[0019] Preferably, the second connecting pipe includes a second vertical sub-pipe, a second bent pipe, and a second inclined sub-pipe connected in sequence;

[0020] One end of the second vertical sub-tube is connected to the exhaust end of the second main unit. The second vertical sub-tube is perpendicular to the exhaust sleeve. The second inclined sub-tube is inclined to the exhaust sleeve. One end of the second inclined sub-tube is connected to the side air inlet of the exhaust sleeve.

[0021] Preferably, a second temperature sensor and a second pressure sensor are installed on the second vertical sub-tube.

[0022] One of the above technical solutions has the following beneficial effects:

[0023] 1. The phased start-up and layered flow guidance design systematically solves the core contradiction of parallel host: the layered flow of the inner and outer flow guidance cavities reduces airflow collision, and after the back pressure imbalance problem is alleviated, the success rate of synchronous loading of the host is improved.

[0024] 2. The intelligent monitoring system works in conjunction with the exhaust valve to eliminate backflow at the exhaust end, reduce ineffective power consumption, and extend equipment life by providing a stable pressure environment and reduced vibration and impact. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a dual-main exhaust structure according to the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the exhaust sleeve in a dual-main exhaust structure of this utility model;

[0027] In the attached diagram: First main unit 1, Second main unit 2, Exhaust sleeve 3, Inner exhaust pipe 31, Inner air inlet 311, Inner exhaust outlet 312, Inner guide cavity 313, Outer exhaust pipe 32, Outer air inlet 321, Outer exhaust outlet 322, Side air inlet 323, Side exhaust outlet 324, Outer guide cavity 325, Exhaust valve assembly 4, Vent pipe 41, Electric regulating valve 42, Annular sealing plate 5, First connecting pipe 6, First vertical sub-pipe 61, First bend pipe 62, First horizontal sub-pipe 63, Second connecting pipe 7, Second vertical sub-pipe 71, Second bend pipe 72, Second inclined sub-pipe 73, Total sensor assembly 8, Total exhaust temperature sensor 81, Total exhaust pressure sensor 82, Check valve 9, Solenoid valve 10, First temperature sensor 11, First pressure sensor 12, Second temperature sensor 13, Second pressure sensor 14. Detailed Implementation

[0028] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] A dual-main exhaust structure includes a first main unit 1, a second main unit 2, an exhaust sleeve 3, and an exhaust valve assembly 4;

[0033] The exhaust sleeve 3 includes an inner exhaust pipe 31 and an outer exhaust pipe 32;

[0034] The two ends of the inner exhaust pipe 31 are an inner air inlet 311 and an inner exhaust outlet 312, respectively. The inner air inlet 311 and the inner exhaust outlet 312 are connected, and the connecting space between the inner air inlet 311 and the inner exhaust outlet 312 is an inner guide cavity 313.

[0035] The outer exhaust pipe 32 has an external air inlet 321 and an external exhaust outlet 322 at its two ends. The outer pipe surface of the outer exhaust pipe 32 is provided with a side air inlet 323 and a side exhaust outlet 324. The side air inlet 323 is located close to the external air inlet 321, and the side exhaust outlet 324 is located close to the external exhaust outlet 322. The external air inlet 321, the external exhaust outlet 322, the side air inlet 323 and the side exhaust outlet 324 are connected to each other, and the connecting space between the external air inlet 321, the external exhaust outlet 322, the side air inlet 323 and the side exhaust outlet 324 is an external flow guide cavity 325.

[0036] The outer exhaust pipe 32 is sleeved on the outer pipe surface of the inner exhaust pipe 31 through the outer air inlet 321. The outer air inlet 321 is sealed to the outer pipe surface of the inner exhaust pipe 31 through the annular sealing plate 5. The inner air inlet 311 is exposed to the outer exhaust pipe 32, and the inner exhaust port 312 is built into the outer exhaust pipe 32.

[0037] The exhaust end of the first host 1 is connected to the inner air inlet 311 through the first connecting pipe 6, the exhaust end of the second host 2 is connected to the side air inlet 323 through the second connecting pipe 7, and the exhaust valve assembly 4 is connected to the side exhaust port 324.

[0038] The outer surface of the outer exhaust pipe 32 is equipped with a total sensor assembly 8. The exhaust valve is used to open or close according to the sensing information of the total sensor assembly 8 to prevent gas backflow.

[0039] It should be noted that the second host 2 is turned on before the first host 1.

[0040] This dual-host exhaust junction solves the problems of airflow collision, back pressure imbalance and operating condition dispersion when the dual hosts are running in parallel by working together through the combined effect of layered flow guidance and dynamic valve control.

[0041] Specifically, such as Figure 1-2 As shown, the second main unit 2 starts first, and its exhaust enters the side inlet 323 of the outer casing exhaust pipe 32 through the second connecting pipe 7 and flows along the outer guide cavity 325. At this time, the outer guide cavity only accommodates a single airflow to avoid initial pressure fluctuations. The first main unit 1 then starts, and its exhaust enters the inner guide cavity 313 of the inner casing exhaust pipe 31 through the first connecting pipe 6, so that the two airflows form a layered flow inside the outer casing, reducing direct collision. Since the inner exhaust port 312 is built into the outer casing exhaust pipe 32, and the outer inlet 321 is sealed to the outer pipe surface of the inner casing exhaust pipe 31 through the annular sealing plate 5, the two airflows need to be discharged uniformly through the outer exhaust port 322 of the outer casing exhaust pipe 32, sharing the total exhaust channel. More importantly, the asymmetry of the outer casing exhaust pipe 32 is compensated by the optimized position of the side inlet 323 of the outer guide cavity, and the volume of the outer guide cavity 325 is used to buffer pressure fluctuations, so that the two airflows are fully mixed before merging, thereby reducing the actual operating pressure difference between the two main units.

[0042] At this time, the total sensor assembly 8 monitors the operating status of the exhaust sleeve 3 in real time, including sensor information such as pressure and temperature. When the value of the sensor information reaches the preset surge line, the linkage control exhaust valve assembly 4 opens the side exhaust port 324, allowing the airflow of the exhaust sleeve 3 to be discharged from the side, further blocking the backflow, thereby reducing the pressure accumulated inside the exhaust sleeve 3, so that the operating status of the exhaust sleeve 3 gradually moves away from the surge zone, reducing the start-stop frequency of the first host 1 and the second host 2 due to the load difference.

[0043] In summary, the beneficial effects of this utility model are as follows:

[0044] 1. The phased start-up and layered flow guidance design systematically solves the core contradiction of parallel host: the layered flow of the inner and outer flow guidance cavities reduces airflow collision, and after the back pressure imbalance problem is alleviated, the success rate of synchronous loading of the host is improved.

[0045] 2. The intelligent monitoring system works in conjunction with the exhaust valve to eliminate backflow at the exhaust end, reduce ineffective power consumption, and extend equipment life by providing a stable pressure environment and reduced vibration and impact.

[0046] To further explain, the total sensor assembly 8 includes a total exhaust temperature sensor 81 and a total exhaust pressure sensor 82;

[0047] The exhaust valve assembly 4 includes an exhaust pipe 41 and an electrically adjustable valve 42 installed on the exhaust pipe 41.

[0048] The vent pipe 41 connects the external guide cavity 325 to the outside air, and the electric regulating valve 42 is used to control the flow and closure of the vent pipe 41.

[0049] Specifically, such as Figure 1 As shown, when the total temperature sensor detects an abnormal rise in exhaust temperature exceeding the set threshold, or the total pressure sensor senses pressure fluctuations reaching the preset surge line, the electric regulating valve 42 opens initially to 30% to release flow and reduce pressure. If it is still close to the surge zone, the opening gradually increases to 50%, 60%, etc. At the same time, the vent pipe 41 releases some gas to the outside, reducing back pressure fluctuations. Simultaneously, the electric regulating valve 42 is a one-way valve, allowing only the airflow from the inner guide chamber to be discharged outwards, preventing backflow of external air. The exhaust valve assembly 4 utilizes intelligent gradient valve control instead of a fixed opening strategy, avoiding frequent start-stop cycles and reducing the wear rate of the main unit.

[0050] To further clarify, the internal air inlet 311 is equipped with a check valve 9.

[0051] like Figure 1 As shown, since the exhaust valve assembly 4 is equipped at the external exhaust port 322 of the entire structure to prevent gas from flowing back into the whole machine, there is no need to set a check valve 9 in the second host 2. It only needs to be set in the first host 1, thereby reducing the number of check valves 9. This can also prevent gas from flowing back and reduce the energy consumption caused by the check valves 9.

[0052] To further explain, the first connecting pipe 6 includes a first vertical sub-pipe 61, a first bent pipe 62, and a first horizontal sub-pipe 63 connected in sequence;

[0053] One end of the first vertical sub-pipe 61 is connected to the exhaust end of the first host 1. The first vertical sub-pipe 61 and the exhaust sleeve 3 are arranged vertically. The first horizontal sub-pipe 63 and the exhaust sleeve 3 are arranged horizontally. One end of the first horizontal sub-pipe 63 is connected to the inner air inlet 311 of the exhaust sleeve 3.

[0054] Specifically, such as Figure 1 As shown, after the first main unit starts up, its exhaust flows vertically through the first vertical sub-pipe 61, and after the flow velocity is buffered by the first curved pipe 62, it turns to the horizontal direction and enters the inner guide cavity 313 of the inner exhaust pipe along the first horizontal sub-pipe 63. The combined design of the first vertical and first horizontal sub-pipes 63 changes the airflow direction from vertical to horizontal, reducing the direct collision with the airflow in the outer guide cavity. At the same time, the curvature design of the first curved pipe 62 disperses the velocity difference and reduces the turbulence intensity.

[0055] To further explain, a solenoid valve 10, a first temperature sensor 11, and a first pressure sensor 12 are installed on the first vertical sub-tube 61.

[0056] Specifically, such as Figure 1 As shown, the solenoid valve 10 installed on the first vertical sub-pipe 61 dynamically adjusts its opening according to real-time monitoring data: when the first temperature sensor 11 detects that the exhaust temperature rises abnormally and exceeds the set threshold, or when the first pressure sensor 12 senses that the pressure fluctuation reaches the preset surge line, the solenoid valve 10 responds quickly and limits the flow by reducing the opening to avoid direct collision between the high-speed airflow and the airflow in the outer guide cavity, thus preventing turbulence; at the same time, the opening adjustment of the solenoid valve 10, combined with the gradient opening and closing strategy of the electric regulating valve 42, coordinates the control of the airflow merging rhythm of the inner and outer guide cavities, reducing pressure shock.

[0057] To further explain, the second connecting pipe 7 includes a second vertical sub-pipe 71, a second bent pipe 72, and a second inclined sub-pipe 73 connected in sequence;

[0058] One end of the second vertical sub-pipe 71 is connected to the exhaust end of the second main unit 2. The second vertical sub-pipe 71 is arranged perpendicularly to the exhaust sleeve 3. The second inclined sub-pipe 73 is arranged inclinedly to the exhaust sleeve 3. One end of the second inclined sub-pipe 73 is connected to the side air inlet 323 of the exhaust sleeve 3.

[0059] Specifically, such as Figure 1As shown, the second main unit 2 starts first, and its exhaust flows vertically through the second vertical sub-pipe 71. After the flow velocity is buffered by the second bend pipe 72, it turns to an inclined direction and enters the second inclined sub-pipe 73. Finally, it merges into the outer guide cavity 325 of the outer casing exhaust pipe 32 through the side air inlet 323. The second vertical sub-pipe 71 is set perpendicular to the exhaust sleeve 3, so that the exhaust direction of the second main unit 2 and the airflow inside the outer casing guide cavity 325 are initially misaligned to avoid direct collision. The curvature design of the second bend pipe 72 disperses the kinetic energy of the high-speed airflow and reduces the velocity difference. The second inclined sub-pipe 73 is connected to the side air inlet 323 with an inclination angle of 30°-45°, which extends the airflow path and guides it to mix with the existing airflow in the outer casing guide cavity 325 when the exhaust of the first main unit 1 is stratified, reducing the turbulence intensity when merging.

[0060] To further explain, a second temperature sensor 13 and a second pressure sensor 14 are installed on the second vertical sub-tube 71.

[0061] Specifically, such as Figure 1 As shown, the second temperature sensor 13 installed on the second vertical sub-pipe monitors the exhaust temperature in real time, and the second pressure sensor 14 detects the gas pressure simultaneously. When the temperature rises abnormally and exceeds the set threshold, the system automatically reduces the operating frequency of the second host 2 to avoid the high-temperature gas from aggravating turbulence. When the pressure fluctuation exceeds the allowable range, the sensor signal triggers the electric regulating valve 42 to open in stages, releasing the gas in the external guide chamber 325 through the vent pipe 41, and using the chamber volume to buffer the pressure impact.

[0062] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A twin host exhaust structure, characterized by, It includes a first host (1), a second host (2), an exhaust sleeve (3), and an exhaust valve assembly (4); The exhaust sleeve (3) includes an inner exhaust pipe (31) and an outer exhaust pipe (32); The two ends of the inner exhaust pipe (31) are an inner air inlet (311) and an inner exhaust outlet (312), respectively. The inner air inlet (311) and the inner exhaust outlet (312) are connected, and the connecting space between the inner air inlet (311) and the inner exhaust outlet (312) is an inner guide cavity (313). The outer exhaust pipe (32) has an external air inlet (321) and an external exhaust outlet (322) at its two ends. The outer pipe surface of the outer exhaust pipe (32) is provided with a side air inlet (323) and a side exhaust outlet (324). The side air inlet (323) is located close to the external air inlet (321), and the side exhaust outlet (324) is located close to the external exhaust outlet (322). The external air inlet (321), the external exhaust outlet (322), the side air inlet (323), and the side exhaust outlet (324) are connected to each other, and the connecting space between the external air inlet (321), the external exhaust outlet (322), the side air inlet (323), and the side exhaust outlet (324) is an external guide cavity (325). The outer exhaust pipe (32) is fitted onto the outer pipe surface of the inner exhaust pipe (31) through the outer air inlet (321). The outer air inlet (321) is sealed to the outer pipe surface of the inner exhaust pipe (31) through an annular sealing plate (5). The inner air inlet (311) is exposed outside the outer exhaust pipe (32), and the inner exhaust port (312) is built into the outer exhaust pipe (32). The exhaust end of the first host (1) is connected to the inner air inlet (311) through the first connecting pipe (6), the exhaust end of the second host (2) is connected to the side air inlet (323) through the second connecting pipe (7), and the exhaust valve assembly (4) is connected to the side exhaust port (324). The outer surface of the outer exhaust pipe (32) is equipped with a total sensor assembly (8), and the exhaust valve is used to open or close according to the sensing information of the total sensor assembly (8) to prevent gas backflow.

2. The dual-host exhaust structure of claim 1, wherein, The total sensor assembly (8) includes a total exhaust temperature sensor (81) and a total exhaust pressure sensor (82); The exhaust valve assembly (4) includes an exhaust pipe (41) and an electrically adjustable valve (42) mounted on the exhaust pipe (41); The vent pipe (41) connects the external guide cavity (325) to the outside air, and the electric regulating valve (42) is used to control the flow and closure of the vent pipe (41).

3. The dual-host exhaust structure of claim 1, wherein, The internal air inlet (311) is equipped with a check valve (9).

4. The dual-host exhaust structure of claim 1, wherein The first connecting pipe (6) includes a first vertical sub-pipe (61), a first bent sub-pipe (62) and a first horizontal sub-pipe (63) connected in sequence; One end of the first vertical sub-pipe (61) is connected to the exhaust end of the first host (1). The first vertical sub-pipe (61) and the exhaust sleeve (3) are arranged vertically. The first horizontal sub-pipe (63) and the exhaust sleeve (3) are arranged horizontally. One end of the first horizontal sub-pipe (63) is connected to the inner air inlet (311) of the exhaust sleeve (3).

5. The dual-host exhaust structure of claim 4, wherein The first vertical sub-tube (61) is equipped with a solenoid valve (10), a first temperature sensor (11) and a first pressure sensor (12).

6. The dual-host exhaust structure of claim 1, wherein The second connecting pipe (7) includes a second vertical sub-pipe (71), a second bent sub-pipe (72), and a second inclined sub-pipe (73) connected in sequence; One end of the second vertical sub-pipe (71) is connected to the exhaust end of the second host (2). The second vertical sub-pipe (71) is perpendicular to the exhaust sleeve (3). The second inclined sub-pipe (73) is inclined to the exhaust sleeve (3). One end of the second inclined sub-pipe (73) is connected to the side air inlet (323) of the exhaust sleeve (3).

7. The dual-host exhaust structure of claim 6, wherein A second temperature sensor (13) and a second pressure sensor (14) are installed on the second vertical sub-tube (71).

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