An expander recovery gas defrosting device

Abstract

This utility model relates to the field of expander defrosting technology, and discloses an expander recovery gas defrosting device, including an expander body, a movable frame externally mounted on the expander body, a connecting cylinder between two horizontal plates on both sides of the movable frame, a sprayer communicating with the interior of the connecting cylinder on its surface, and a first support plate rotatably mounted on both sides of the connecting cylinder; through the cooperation of a motor, a reciprocating screw, a reciprocating screw sleeve, a fixed plate, a support shaft, and other structures, the movement of the movable frame and the swing of the connecting cylinder are realized, thereby effectively increasing the spraying range of the sprayer, allowing hot air to evenly cover a larger area of ​​the expander sidewall along the swing trajectory and lateral movement trajectory, effectively avoiding the problem of frost and ice residue blind spots caused by insufficient range, achieving full-area defrosting of the sidewall without dead corners, accelerating the melting speed of frost and ice, shortening the single defrosting time, and improving the defrosting effect per unit time, with high practicality.

Description

Technical Field

[0001] This utility model relates to the field of expander defrosting technology, specifically to an expander recoverable gas defrosting device. Background Technology

[0002] An expander is a machine that utilizes the principle of reducing gas temperature by outputting mechanical work when compressed gas expands and decreases pressure. Expanders are commonly used in cryogenic equipment. Based on their motion and structure, expanders are classified into two types: piston expanders and turbine expanders. Piston expanders are mainly suitable for small to medium-sized high and medium pressure cryogenic equipment with high pressure ratios and low flow rates.

[0003] In the prior art, CN215890111U discloses an expander recovery gas defrosting device. Although the above-mentioned prior art achieves the goal of automatic defrosting and unattended cleaning by setting a solenoid valve in the recovery exhaust pipe, introducing hot air from the recovery gas pipe into the heating pipe when the temperature reaches a preset low value, and then blowing hot air through the fixed holes on the heating pipe onto the side wall of the expander to melt frost and ice and collect it in a collection tank, in actual use, the above solution has the problem of a small air jet range due to the fixed blowing angle, which seriously restricts the defrosting effect. The fixed angle of the holes on the heating pipe means that the blown hot air can only enter in a single direction. The limited diffusion range restricts the jetting area to a narrow region directly in front of the orifice. Because hot air loses energy rapidly during transmission due to heat dissipation and diffusion, it cannot effectively reach the expander sidewalls outside this narrow range, creating defrosting blind spots. This results in overheating and energy waste within the narrow region directly in front of the orifice, while insufficient heating leaves frost and ice residue outside the range. The continuous accumulation of frost and ice in these uncovered areas is difficult to remove, affecting not only the overall heat exchange efficiency of the equipment but also potentially causing localized low-temperature stress anomalies due to excessively thick frost. Therefore, we propose an expander gas recovery defrosting device to address these problems. Utility Model Content

[0004] The purpose of this invention is to provide an expander recovery gas defrosting device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an expander recovery gas defrosting device, comprising an expander body, a movable frame disposed on the outside of the expander body, a connecting cylinder disposed between the two horizontal plates of the movable frame, a sprayer disposed on the surface of the connecting cylinder and communicating with the interior, a first support plate rotatably sleeved on both sides of the connecting cylinder, the first support plate being fixedly connected to the surface of the horizontal plate of the movable frame, cavities being opened inside the two vertical plates of the movable frame, the two end pipes of the connecting cylinder respectively rotatably penetrating into the interior of the two cavities, a heating gas pipe being fixedly connected to the left side surface of the movable frame, the two ends of the heating gas pipe being fixedly penetrating into the interior of the left side cavity, a rotating flange disposed between the heating gas pipe and the left side pipe of the connecting cylinder, the left side pipe of the connecting cylinder being connected to the heating gas pipe via the rotating flange, a driving assembly disposed inside the right side cavity, and a support assembly disposed on the outside of the expander body.

[0006] Preferably, the drive assembly includes a drive shaft rotatably connected to the inside of the right cavity. Two transmission rods are disposed inside the right cavity, and a second support plate is rotatably sleeved on the outside of each of the two transmission rods. The second support plate is fixedly connected to the inside of the right cavity. A first bevel gear is fixedly sleeved on one end of the drive shaft located inside the right cavity, and a second bevel gear is fixedly sleeved on both ends of the two transmission rods. The first bevel gear and two adjacent second bevel gears are meshed and connected.

[0007] Preferably, the right ends of both connecting cylinders are fixedly connected to a support shaft, and both support shafts rotate through into the interior of the right cavity. A third bevel gear is fixedly sleeved on one end of each support shaft located inside the right cavity, and the two third bevel gears mesh with two adjacent second bevel gears respectively.

[0008] Preferably, the support assembly includes a mounting ring, which is fixedly sleeved on the outside of the expander body. Two connecting plates are fixedly connected to the outside of the mounting ring. Guide grooves are formed on opposite sides of the two connecting plates. Movable chambers are formed inside the two connecting plates, and the movable chambers are connected to the guide grooves.

[0009] Preferably, the drive shaft extends slidably into the movable chamber inside the right connecting plate via a guide groove. A transmission gear is fixedly connected to one end of the drive shaft inside the movable chamber. Transmission teeth are fixedly connected to the upper and lower inner walls of the movable chamber on the right side, and the transmission gear and transmission teeth are meshed together.

[0010] Preferably, a reciprocating lead screw is rotatably connected to the movable chamber inside the connecting plate on the left side. A reciprocating lead screw sleeve is fitted around the outside of the reciprocating lead screw. A fixing plate is fixedly connected to the surface of the reciprocating lead screw sleeve. The fixing plate slides out of the interior of the left guide groove. The fixing plate is fixedly connected to the left vertical plate of the movable frame.

[0011] Preferably, a motor is fixedly connected to the surface of the left connecting plate, and the output shaft of the motor rotates through the interior of the left connecting plate. The output shaft of the motor is fixedly connected by a coupling and a reciprocating lead screw.

[0012] Preferably, guide rails are fixedly connected to both the upper and lower surfaces of the mounting ring, and two supporting inclined plates are slidably connected inside the guide rails. Both supporting inclined plates are fixedly connected to the horizontal plate of the movable frame.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model achieves the movement of the moving frame and the swinging of the connecting cylinder through the cooperation of the motor, reciprocating lead screw, reciprocating lead screw sleeve, fixed plate, support shaft and other structures. This effectively increases the spraying range of the sprayer, allowing hot air to evenly cover a larger area of ​​the expander sidewall along the swinging and lateral movement trajectory. This effectively avoids the problem of frost and ice residue blind spots caused by insufficient range, achieves defrosting of the entire sidewall without dead angles, accelerates the melting speed of frost and ice, shortens the single defrosting time, and improves the defrosting effect per unit time. It has high practicality.

[0014] 2. This utility model achieves the automatic slow swinging of the connecting cylinder during the reciprocating movement of the moving frame by coordinating the drive shaft, transmission rod, first bevel gear, second bevel gear, third bevel gear, transmission gear, and transmission teeth. No additional drive is required, which improves the efficiency of the motor, reduces the enterprise's procurement and production costs, and has high economic benefits. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an expander gas recovery defrosting device according to the present invention; Figure 2 This is a schematic diagram of the structure of the mobile frame of this utility model; Figure 3 This is a cross-sectional view of the mobile frame of this utility model; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a cross-sectional view of the connecting plate on the right side of this utility model. Figure 6 This is a cross-sectional view of the left connecting plate of this utility model.

[0016] In the diagram: 1. Expander body; 2. Moving frame; 3. Connecting cylinder; 4. Sprayer; 5. First support plate; 6. Cavity; 7. Heating pipe; 8. Rotating flange; 9. Drive shaft; 10. Transmission rod; 11. First bevel gear; 12. Second bevel gear; 13. Support shaft; 14. Third bevel gear; 15. Second support plate; 16. Mounting ring; 17. Connecting plate; 18. Guide groove; 19. Movable chamber; 20. Transmission gear; 21. Transmission teeth; 22. Reciprocating lead screw; 23. Reciprocating lead screw sleeve; 24. Fixed plate; 25. Motor; 26. Guide rail; 27. Support inclined plate. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] Please see Figures 1-6 As shown, an expander gas recovery defrosting device includes an expander body 1, a movable frame 2 is provided on the outside of the expander body 1, a connecting cylinder 3 is provided between the two horizontal plates of the movable frame 2, a sprayer 4 connected to the inside is provided on the surface of the connecting cylinder 3, a first support plate 5 is rotatably sleeved on both sides of the connecting cylinder 3, the first support plate 5 is fixedly connected to the surface of the horizontal plate of the movable frame 2, a cavity 6 is opened in the inside of the two vertical plates of the movable frame 2, the two end pipes of the connecting cylinder 3 respectively rotatably penetrate into the inside of the two cavities 6, a heating gas pipe 7 is fixedly connected to the left side surface of the movable frame 2, the two ends of the heating gas pipe 7 are fixedly penetrated into the inside of the left cavity 6, a rotating flange 8 is provided between the heating gas pipe 7 and the left pipe of the connecting cylinder 3, the left pipe of the connecting cylinder 3 is connected to the heating gas pipe 7 through the rotating flange 8, a drive assembly is provided inside the right cavity 6, and a support assembly is provided on the outside of the expander body 1.

[0019] Among them, the expander body 1 is the prior art, and the expander body 1 is also matched with components such as temperature sensor, recovery gas pipe, collection tank, drain pipe, drain pump, solenoid valve and shut-off valve. For details, please refer to the prior art with announcement number CN215890111U. Since it is conventional technology in this field, it will not be described in detail in this article.

[0020] The drive assembly includes a drive shaft 9, which is rotatably connected inside the right cavity 6. Two transmission rods 10 are arranged inside the right cavity 6. A second support plate 15 is rotatably sleeved on the outside of each of the two transmission rods 10. The second support plate 15 is fixedly connected inside the right cavity 6. The arrangement of the second support plate 15 effectively ensures the stability of the transmission rods 10 and provides support for the transmission rods 10. A first bevel gear 11 is fixedly sleeved on one end of the drive shaft 9 inside the right cavity 6. A second bevel gear 12 is fixedly sleeved on both ends of the two transmission rods 10. The first bevel gear 11 and two adjacent second bevel gears 12 are meshed and connected.

[0021] The right ends of the two connecting cylinders 3 are fixedly connected to support shafts 13. The two support shafts 13 rotate through the inside of the right cavity 6. The ends of the two support shafts 13 inside the right cavity 6 are fixedly fitted with third bevel gears 14. The two third bevel gears 14 are respectively meshed with two adjacent second bevel gears 12. The rotation of the drive shaft 9 can drive the rotation of the first bevel gear 11. At this time, the transmission of the two adjacent second bevel gears 12 can drive the rotation of the transmission rod 10. The rotation of the transmission rod 10 and the transmission of the second bevel gears 12 and the third bevel gears 14 can drive the rotation of the support shafts 13. The rotation of the support shafts 13 can drive the rotation of the connecting cylinders 3, thereby realizing the swing of the sprayer 4.

[0022] The support assembly includes a mounting ring 16, which is fixedly sleeved on the outside of the expander body 1. Two connecting plates 17 are fixedly connected to the outside of the mounting ring 16. Guide grooves 18 are opened on opposite sides of the two connecting plates 17. Movable chambers 19 are opened inside the two connecting plates 17, and the movable chambers 19 are connected to the guide grooves 18.

[0023] The drive shaft 9 extends slidably into the movable chamber 19 inside the right connecting plate 17 via the guide groove 18. A transmission gear 20 is fixedly connected to one end of the drive shaft 9 inside the movable chamber 19. Transmission teeth 21 are fixedly connected to the upper and lower inner walls of the right movable chamber 19. The transmission gear 20 and the transmission teeth 21 mesh with each other. The drive shaft 9 is moved by the moving frame 2. At this time, the drive shaft 9 will move inside the guide groove 18 and the movable chamber 19, thereby driving the transmission gear 20 to move inside the movable chamber 19. Subsequently, the reciprocating rotation of the drive shaft 9 can be achieved by the cooperation between the transmission gear 20 and the transmission teeth 21.

[0024] In the above embodiment, each segment of transmission teeth 21 has the same length, but the rotation directions of adjacent segments of transmission teeth 21 are opposite, with one segment being a left-handed tooth and the next a right-handed tooth. The segments of transmission teeth 21 are closely arranged to ensure that the transmission gear 20 immediately engages the next segment after disengaging from the previous segment, without any idle stroke. For example, when the transmission gear 20 engages the left-handed transmission tooth segment 21, the transmission gear 20 rotates clockwise under the action of the transmission teeth 21. When the transmission gear 20 enters the right-handed transmission tooth segment 21, the meshing action forces the transmission gear 20 to rotate counterclockwise. This achieves periodic forward and reverse rotation of the transmission gear 20 during movement due to the alternating rotation directions of the transmission teeth 21. In addition, inclined guide teeth can be added at the junction of the transmission teeth 21 to optimize the smoothness of meshing. Since this is a conventional technical means, it will not be described in detail in this article.

[0025] A reciprocating screw 22 is rotatably connected to the movable chamber 19 inside the left connecting plate 17. A reciprocating screw sleeve 23 is sleeved on the outside of the reciprocating screw 22. The reciprocating screw sleeve 23 cooperates with the spiral groove on the surface of the reciprocating screw 22 through the internal guide element, so that the reciprocating screw sleeve 23 can reciprocate along the axial direction of the reciprocating screw 22 when the reciprocating screw 22 rotates. A fixing plate 24 is fixedly connected to the surface of the reciprocating screw sleeve 23. The fixing plate 24 slides out of the interior of the left guide groove 18. The fixing plate 24 is fixedly connected to the left vertical plate of the movable frame 2. The rotation of the reciprocating screw 22 can drive the movement of the reciprocating screw sleeve 22. The movement of the reciprocating screw sleeve 22 can drive the movement of the fixing plate 24. The movement of the fixing plate 24 can drive the movement of the movable frame 2.

[0026] A motor 25 is fixedly connected to the surface of the left connecting plate 17. The output shaft of the motor 25 rotates through the interior of the left connecting plate 17. The output shaft of the motor 25 is fixedly connected to the reciprocating screw 22 by means of a coupling. The reciprocating screw 22 can be rotated by starting the motor 25.

[0027] Among them, the motor 25 is also equipped with a power supply, wires, controller and microcomputer, etc. Since they are not the main structures, they will not be described in detail in this article.

[0028] In the above embodiment, the recovery exhaust pipe and the heating pipe 7 matched to the expander body 1 are connected by a flexible hose, and a certain margin is left so as not to restrict the reciprocating movement of the moving frame 2.

[0029] Guide rails 26 are fixedly connected to both the upper and lower surfaces of the mounting ring 16. There is a certain gap between the guide rails 26 and the expander body 1. Two support inclined plates 27 are slidably connected inside the guide rails 26. Both support inclined plates 27 are fixedly connected to the cross plate of the moving frame 2. The stability of the moving frame 2 is further ensured by the cooperation between the guide rails 26 and the support inclined plates 27.

[0030] Working principle: When the expander body 1 runs for a period of time, the side wall of the expander body 1 will frost up and even freeze. When the temperature reaches a low value, the solenoid valve on the recovery exhaust pipe receives a signal and opens the solenoid valve, which delivers the hot air in the original recovery air pipe of the expander body 1 to the interior of the heating air pipe 7. Then, it will enter the interior of the connecting cylinder 3 through the rotating flange 8 and the pipe on the left side of the connecting cylinder 3, and the hot air will be blown onto the side wall of the expander body 1 by the sprayer 4, thereby melting the frost and ice on the side wall of the expander body 1. The melted frost and ice form water and drip into the collection tank matched on the lower side of the expander body 1 for centralized collection and treatment.

[0031] In addition, the external control components will simultaneously turn on the motor 25. The rotation of the output shaft of the motor 25 will drive the rotation of the reciprocating lead screw 22. The rotation of the reciprocating lead screw 22 will drive the movement of the reciprocating lead screw sleeve 22. The movement of the reciprocating lead screw sleeve 22 will drive the movement of the fixed plate 24. The movement of the fixed plate 24 will drive the movement of the moving frame 2.

[0032] When the movable frame 2 drives the drive shaft 9 to move, the drive shaft 9 will move inside the guide groove 18 and the movable chamber 19, thereby driving the transmission gear 20 to move inside the movable chamber 19. Subsequently, the reciprocating rotation of the drive shaft 9 can be achieved by the cooperation between the transmission gear 20 and the transmission teeth 21.

[0033] Subsequently, the rotation of the drive shaft 9 drives the rotation of the first bevel gear 11. At this time, the rotation of the transmission rod 10 is driven by the transmission of the two adjacent second bevel gears 12. The rotation of the transmission rod 10, the transmission of the second bevel gear 12 and the third bevel gear 14 drives the rotation of the support shaft 13. The rotation of the support shaft 13 drives the rotation of the connecting cylinder 3, thereby realizing the swing of the sprayer 4. Finally, as the moving frame 2 drives the connecting cylinder 3 and the sprayer 4 to move along the direction of the expander body 1, the sprayer 4 will swing, thereby greatly increasing the range of hot air sprayed by the sprayer 4 and ensuring the defrosting effect and efficiency of the expander body 1.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An expander gas recovery defrosting device, comprising an expander body (1), characterized in that: The expander body (1) is provided with a movable frame (2) on its exterior. A connecting cylinder (3) is provided between the two horizontal plates of the movable frame (2). A sprayer (4) communicating with the interior is provided on the surface of the connecting cylinder (3). A first support plate (5) is rotatably sleeved on both sides of the connecting cylinder (3). The first support plate (5) is fixedly connected to the surface of the horizontal plate of the movable frame (2). A cavity (6) is opened inside the two vertical plates of the movable frame (2). The pipes at both ends of the connecting cylinder (3) rotatably pass through it. Inside the two cavities (6), a heating pipe (7) is fixedly connected to the left side surface of the movable frame (2). Both ends of the heating pipe (7) are fixedly inserted into the left cavity (6). A rotating flange (8) is provided between the heating pipe (7) and the left pipe of the connecting cylinder (3). The left pipe of the connecting cylinder (3) is connected to the heating pipe (7) through the rotating flange (8). A drive assembly is provided inside the right cavity (6). A support assembly is provided outside the expander body (1).

2. The defrosting device for expander recovered gas according to claim 1, characterized in that: The drive assembly includes a drive shaft (9), which is rotatably connected to the inside of the right cavity (6). Two transmission rods (10) are provided inside the right cavity (6). A second support plate (15) is rotatably sleeved on the outside of each of the two transmission rods (10). The second support plate (15) is fixedly connected to the inside of the right cavity (6). A first bevel gear (11) is fixedly sleeved at one end of the drive shaft (9) inside the right cavity (6). A second bevel gear (12) is fixedly sleeved at both ends of the two transmission rods (10). The first bevel gear (11) and the two adjacent second bevel gears (12) are meshed together.

3. The defrosting device for expander recovered gas according to claim 2, characterized in that: The right ends of the two connecting cylinders (3) are fixedly connected to support shafts (13). The two support shafts (13) rotate through the inside of the right cavity (6). The two support shafts (13) are fixedly fitted with third bevel gears (14) at one end inside the right cavity (6). The two third bevel gears (14) mesh with two adjacent second bevel gears (12).

4. The defrosting device for expander recovered gas according to claim 3, characterized in that: The support assembly includes a mounting ring (16), which is fixedly sleeved on the outside of the expander body (1). Two connecting plates (17) are fixedly connected to the outside of the mounting ring (16). Guide grooves (18) are provided on opposite sides of the two connecting plates (17). Movable chambers (19) are provided inside the two connecting plates (17). The movable chambers (19) and the guide grooves (18) are connected.

5. The defrosting device for expander recovered gas according to claim 4, characterized in that: The drive shaft (9) slides through the guide groove (18) into the movable chamber (19) opened inside the right connecting plate (17). A transmission gear (20) is fixedly connected to one end of the drive shaft (9) inside the movable chamber (19). Transmission teeth (21) are fixedly connected to the upper and lower inner walls of the movable chamber (19) on the right side. The transmission gear (20) and the transmission teeth (21) are meshed together.

6. The defrosting device for expander recovered gas according to claim 5, characterized in that: A reciprocating screw (22) is rotatably connected in the movable chamber (19) inside the connecting plate (17) on the left. A reciprocating screw sleeve (23) is sleeved on the outside of the reciprocating screw (22). A fixing plate (24) is fixedly connected to the surface of the reciprocating screw sleeve (23). The fixing plate (24) slides out of the interior of the left guide groove (18). The fixing plate (24) is fixedly connected to the left vertical plate of the moving frame (2).

7. The defrosting device for expander recovered gas according to claim 6, characterized in that: A motor (25) is fixedly connected to the surface of the connecting plate (17) on the left side. The output shaft of the motor (25) rotates through the interior of the connecting plate (17) on the left side. The output shaft of the motor (25) is fixedly connected by a coupling and a reciprocating screw (22).

8. The defrosting device for expander recovered gas according to claim 7, characterized in that: The upper and lower surfaces of the mounting ring (16) are fixedly connected with guide rails (26), and two support inclined plates (27) are slidably connected inside the guide rails (26). Both support inclined plates (27) are fixedly connected to the horizontal plate of the moving frame (2).

Images