Secondary pressurization purging expansion refrigeration device

Abstract

According to the technical scheme, the secondary pressurization purging expansion refrigeration device comprises an expansion machine A and an expansion machine B. The expansion machine B is installed at one end of the expansion machine A through a connecting pipe, an air inlet pipe is installed on one side of the top of the expansion machine A, and one side of the air inlet pipe is connected with a refrigeration air inlet pipe. The side, away from the refrigeration air inlet pipe, of the air inlet pipe is connected with a purging air inlet pipe, an exhaust pipe is installed on one side of the expansion machine B, monitoring heads are installed between a connecting pipe and the exhaust pipe, and monitors are connected to the tops of the monitoring heads on the two sides through wire harnesses. The secondary pressurization purging expansion refrigeration device solves the problems that when an existing expansion refrigeration device is used, the gas production efficiency cannot be monitored in real time, and when the production efficiency of an expansion machine is reduced, a producer cannot purge the expansion machine in time, the expansion machine can be conveniently purged in time, and the production efficiency of the expansion machine is improved. Therefore, the production efficiency of the expansion machine is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion refrigeration, in particular to a secondary pressurization and purge expansion refrigeration device. Background Art

[0002] An expander is a machine that uses the principle of reducing the temperature of the gas by outputting mechanical work when the compressed gas expands and depressurizes to obtain cooling capacity. Expanders are often used in cryogenic equipment. Expanders are divided into two categories according to the form of movement and structure: piston expanders and turbine expanders. Piston expanders are mainly suitable for small and medium-sized high and medium pressure cryogenic equipment with high pressure ratio and small flow.

[0003] After searching, it was found that the expansion refrigeration device in the prior art, such as the turbine expander with adjustable gas-liquid two-phase deposited droplet purge gas disclosed in publication number CN117052492A, can discharge the deposited droplets in the impeller in time through the turbine expander and its impeller structure, effectively preventing the large-scale aggregation of droplets and collision with the blades, thereby improving the operating stability of the two-phase turbine rotor, and realizing the purpose of automatic purging of deposited droplets by utilizing the pressure difference between the impeller back and the impeller outlet, thereby further improving the liquid entrainment rate of the two-phase turbine expander.

[0004] The existing expansion refrigeration device cannot monitor the gas production efficiency in real time when in use. When the production efficiency of the expander decreases, the producer cannot purge the expander in time. Therefore, we propose a secondary pressurization and purge expansion refrigeration device. Utility Model Content

[0005] The purpose of the utility model is to provide a secondary pressurization and purging expansion refrigeration device to achieve the effect of real-time monitoring of the production efficiency of the expander, so as to solve the problem that the existing expansion refrigeration device cannot monitor the gas production efficiency in real time when in use, and when the production efficiency of the expander is reduced, the producer cannot purge the expander in time.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a secondary boosting and purging expansion refrigeration device, comprising an expander A and an expander B, wherein the expander B is installed at one end of the expander A through a connecting pipe, an air inlet pipe is installed on one side of the top of the expander A, one side of the air inlet pipe is connected to a refrigeration air inlet pipe, the side of the air inlet pipe away from the refrigeration air inlet pipe is connected to a purge air inlet pipe, an exhaust pipe is installed on one side of the expander B, a monitoring head is installed between the connecting pipe and the exhaust pipe, and monitors are connected to the tops of the monitoring heads on both sides through wiring harnesses.

[0007] Preferably, a rotating shaft is installed in the middle of the expander A through a bearing, impellers A are installed on both sides of the rotating shaft, and ventilation grooves are provided on both sides of the expander A on one side of the impeller A.

[0008] Preferably, a diverter groove A is provided inside the expander A on one side close to the impellers A on both sides, and a connecting hole A is provided inside the expander A on one side of the diverter groove A, and the end of the connecting hole A is arranged on the outer surface of the impeller A.

[0009] Preferably, a pressurized air intake pipe is installed on the top of the expander A away from the air intake pipe, the end of the pressurized air intake pipe is connected to the inside of the diverter groove A, and a pressurized air exhaust pipe is installed on the side of the expander A away from the connecting pipe.

[0010] Preferably, a movable shaft is installed inside the expander B through a bearing, and an impeller B is installed inside the expander B at one end of the movable shaft.

[0011] Preferably, a diverter groove B is provided inside the expander B on the side close to the impeller B, a guide pipe is provided on the top of the diverter groove B, a connecting hole B is provided inside the expander B on the side of the diverter groove B, the end of the connecting hole B is arranged on the outer surface of the impeller B, and the end of the guide pipe is connected to the inside of the connecting pipe.

[0012] Preferably, a control valve is installed between the refrigeration air inlet pipe and the purge air inlet pipe.

[0013] Preferably, a temperature sensor is installed on one side of the bottom of the monitoring head, an air pressure sensor is installed on one side of the bottom of the monitoring head close to the temperature sensor, and a flow rate sensor is installed on one side of the bottom of the monitoring head close to the air pressure sensor.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. The utility model achieves the effect of real-time monitoring of the production efficiency of the expander by arranging a monitor, a monitoring head, a temperature sensor, an air pressure sensor and a flow rate sensor, so as to solve the problem that the existing expansion refrigeration device cannot monitor the gas production efficiency in real time when in use, and the producer cannot purge the expander in time when the production efficiency of the expander is reduced. The utility model facilitates the timely purge of the expander, thereby ensuring the production efficiency of the expander.

[0016] 2. The utility model achieves the effect of secondary pressurization of the gas by setting the expander A and the expander B, so as to solve the problem that the existing gas adopts a single expansion mechanism for cooling, the gas cooling efficiency is low, and the production efficiency is poor, thereby improving the gas cooling efficiency and thus improving the production efficiency of the low-temperature gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2It is a cross-sectional structural schematic diagram of the expander A of the utility model;

[0019] Figure 3 It is a cross-sectional structural schematic diagram of the expander B of the utility model;

[0020] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of A.

[0021] Figure markings: 1. expander A; 2. connecting pipe; 3. expander B; 4. exhaust pipe; 5. monitoring head; 6. monitor; 7. guide pipe; 8. wiring harness; 9. intake pipe; 10. boost intake pipe; 11. boost exhaust pipe; 12. rotating shaft; 13. connecting hole A; 14. ventilation groove; 15. refrigeration intake pipe; 16. control valve; 17. purge intake pipe; 18. impeller A; 19. diverter groove A; 20. diverter groove B; 21. movable shaft; 22. impeller B; 23. connecting hole B; 24. temperature sensor; 25. air pressure sensor; 26. flow rate sensor. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Embodiment 1

[0024] like Figure 1 and Figure 2 As shown, in order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a secondary boosting and purging expansion refrigeration device, comprising an expander A1 and an expander B3, wherein the expander B3 is installed at one end of the expander A1 through a connecting pipe 2, a rotating shaft 12 is installed in the middle of the expander A1 through a bearing, and impellers A18 are installed on both sides of the rotating shaft 12, and ventilation grooves 14 are provided on both sides of the expander A1 on one side of the impeller A18, and a diverter groove A19 is provided on one side of the expander A1 close to the impellers A18 on both sides, and a connecting hole A13 is provided on one side of the diverter groove A19 in the expander A1, The end of the connecting hole A13 is arranged on the outer surface of the impeller A18, a boost inlet pipe 10 is installed on the side of the top of the expander A1 away from the inlet pipe 9, and the end of the boost inlet pipe 10 is connected to the inside of the diverter groove A19, a boost exhaust pipe 11 is installed on the side of the expander A1 away from the connecting pipe 2, an inlet pipe 9 is installed on the top side of the expander A1, a refrigeration inlet pipe 15 is connected to one side of the inlet pipe 9, and a purge inlet pipe 17 is connected to the side of the inlet pipe 9 away from the refrigeration inlet pipe 15, an exhaust pipe 4 is installed on one side of the expander B3, and a control valve 16 is installed between the refrigeration inlet pipe 15 and the purge inlet pipe 17.

[0025] like Figure 3 and Figure 4As shown, a monitoring head 5 is installed between the connecting pipe 2 and the exhaust pipe 4, and the tops of the monitoring heads 5 on both sides are connected to monitors 6 through wiring harnesses 8. A temperature sensor 24 is installed on one side of the bottom of the monitoring head 5 to monitor the exhaust temperature of the expander A1 and the expander B3. A pressure sensor 25 is installed on one side of the bottom of the monitoring head 5 near the temperature sensor 24 to monitor the exhaust pressure of the expander A1 and the expander B3. A flow rate sensor 26 is installed on one side of the bottom of the monitoring head 5 near the pressure sensor 25 to monitor the exhaust flow rate of the expander A1 and the expander B3.

[0026] The working principle of a secondary boost purge expansion refrigeration device based on Example 1 is: after the utility model is installed, the gas is transported to the intake pipe 9 through the refrigeration intake pipe 15, and then guided to the inside of the diverter groove A19 in the expander A1 through the intake pipe 9, and then guided to the outer surface of the impeller A18 through the connecting hole A13, and the gas is cooled by the impeller A18. The cooled gas is guided to the connecting pipe 2, and then transported to the expander B3 through the guide pipe 7, and finally discharged through the exhaust pipe 4. At the same time, the gas parameters are monitored by the temperature sensor 24, the air pressure sensor 25 and the flow rate sensor 26 at the bottom of the monitoring head 5, and the gas data is transmitted to the monitor 6. The gas transmission efficiency is analyzed by the monitor 6. When the gas transmission efficiency is low, the refrigeration intake pipe 15 is closed, and the purge intake pipe 17 is opened to purge the inside of the expander A1 and the expander B3. At this point, the working process of the device is completed.

[0027] Embodiment 2

[0028] like Figure 3 As shown, the utility model proposes a secondary boosting and purging expansion refrigeration device. Compared with the first embodiment, this embodiment also includes: a movable shaft 21 is installed inside the expander B3 through a bearing, one end of the movable shaft 21 is located inside the expander B3 and an impeller B22 is installed, a diverter groove B20 is provided on the side of the impeller B22 inside the expander B3, a guide pipe 7 is provided on the top of the diverter groove B20, a connecting hole B23 is provided on the side of the diverter groove B20 inside the expander B3, and the end of the connecting hole B23 is arranged on the outer surface of the impeller B22, the gas is cooled secondarily by the impeller inside the expander B3, and the end of the guide pipe 7 is connected to the inside of the connecting pipe 2.

[0029] In this embodiment, after the gas is guided to the connecting pipe 2, the gas is transported to the inside of the diverter groove B20 through the guide pipe 7, and the gas inside the diverter groove B20 is guided to the impeller B22 through the connecting hole B23. The gas is pressurized and cooled by the impeller B22, and the pressurized and cooled gas is discharged through the exhaust pipe 4.

[0030] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A secondary boosting and purging expansion refrigeration device, comprising an expander A (1) and an expander B (3), characterized in that: An expander B (3) is installed at one end of the expander A (1) via a connecting pipe (2); an air inlet pipe (9) is installed on one side of the top of the expander A (1); one side of the air inlet pipe (9) is connected to a refrigeration air inlet pipe (15); the side of the air inlet pipe (9) facing away from the refrigeration air inlet pipe (15) is connected to a purge air inlet pipe (17); an exhaust pipe (4) is installed on one side of the expander B (3); monitoring heads (5) are installed between the connecting pipe (2) and the exhaust pipe (4); and the tops of the monitoring heads (5) on both sides are connected to monitors (6) via wiring harnesses (8).

2. A secondary pressurization, purge and expansion refrigeration device according to claim 1, characterized in that: A rotating shaft (12) is installed in the middle of the expander A (1) via a bearing, and impellers A (18) are installed on both sides of the rotating shaft (12). Ventilation grooves (14) are provided on both sides of the expander A (1) on one side of the impeller A (18).

3. A secondary pressurization, purge and expansion refrigeration device according to claim 2, characterized in that: The expander A (1) is provided with a diverter groove A (19) on one side close to the impellers A (18) on both sides, and the expander A (1) is provided with a connecting hole A (13) on one side of the diverter groove A (19), and the end of the connecting hole A (13) is arranged on the outer surface of the impeller A (18).

4. The secondary pressurization, purging and expansion refrigeration device according to claim 1, characterized in that: A pressurized air intake pipe (10) is installed on the top of the expander A (1) on the side away from the air intake pipe (9), and the end of the pressurized air intake pipe (10) is connected to the inside of the diverter groove A (19). A pressurized air exhaust pipe (11) is installed on the side of the expander A (1) away from the connecting pipe (2).

5. The secondary boosting, purging and expansion refrigeration device according to claim 1, characterized in that: A movable shaft (21) is installed inside the expander B (3) via a bearing, and an impeller B (22) is installed at one end of the movable shaft (21) inside the expander B (3).

6. A secondary pressurization, purging and expansion refrigeration device according to claim 5, characterized in that: A diverter groove B (20) is provided inside the expander B (3) on one side close to the impeller B (22), a guide tube (7) is provided on the top of the diverter groove B (20), a connecting hole B (23) is provided inside the expander B (3) on one side of the diverter groove B (20), a terminal end of the connecting hole B (23) is provided on the outer surface of the impeller B (22), and a terminal end of the guide tube (7) is connected to the inside of the connecting tube (2).

7. The secondary boosting, purging and expansion refrigeration device according to claim 1, characterized in that: A control valve (16) is installed between the refrigeration air inlet pipe (15) and the purge air inlet pipe (17).

8. The secondary pressurization, purging and expansion refrigeration device according to claim 1, characterized in that: A temperature sensor (24) is installed on one side of the bottom of the monitoring head (5), an air pressure sensor (25) is installed on one side of the bottom of the monitoring head (5) close to the temperature sensor (24), and a flow rate sensor (26) is installed on one side of the bottom of the monitoring head (5) close to the air pressure sensor (25).

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