A tunnel type steaming equipment for steamed buns

Abstract

This invention discloses a tunnel-type steaming device for xiaolongbao (soup dumplings), belonging to the technical field of steaming equipment. The key technical points are: a tunnel-type steaming device for xiaolongbao includes a main frame and an insulation cover mounted on the main frame. A water storage tank is provided on the main frame, which provides a water seal to the insulation cover. Smoke hoods are provided on both sides of the main frame. This invention, by making the insulation cover detachable, facilitates repair of the tunnel-type steaming equipment when internal damage occurs. After repair and normal operation, water is injected into the water storage tank, which provides a water seal to the insulation cover. The water in the storage tank absorbs the steam inside the insulation cover, effectively preventing steam leakage and external temperature rise. Simultaneously, by providing smoke hoods on both sides of the main frame, excess steam inside the steaming equipment can be discharged through the smoke hoods on both sides.

Description

Technical Field

[0001] The present invention relates to the field of steaming equipment technology, and more specifically, to a tunnel-type steaming equipment for xiaolongbao (soup dumplings). Background Technology

[0002] The tunnel-type steaming equipment for xiaolongbao is an industrial steaming equipment used for continuous and automated production of xiaolongbao. Its core feature is that it simulates the traditional steaming process and combines it with modern automation technology to greatly improve production efficiency and product consistency. It is suitable for the large-scale production needs of food factories, central kitchens or chain catering enterprises. The main body of the tunnel-type steaming equipment is a closed long tunnel with a conveyor belt inside. The xiaolongbao pass through the tunnel at a constant speed through the conveyor belt, and complete the preheating, heating and heat preservation processes in sequence.

[0003] When existing tunnel steaming equipment is in operation, excess steam leaks from both sides of the equipment, leading to an increase in indoor temperature and humidity. In addition, to facilitate observation of the inside of the equipment and maintenance of damaged internal structures, some existing steaming equipment has a removable insulation cover. However, the removable insulation cover further contributes to steam leakage.

[0004] Therefore, a new solution is needed to address this problem. Summary of the Invention

[0005] The purpose of this invention is to provide a tunnel-type steaming device for xiaolongbao (soup dumplings) in order to solve the above-mentioned problems.

[0006] The above-mentioned technical objective of this invention is achieved through the following technical solution: a tunnel-type steaming device for xiaolongbao (soup dumplings), comprising a frame body and a heat-insulating cover mounted on the frame body. The frame body is provided with symmetrically distributed water storage tanks, and both ends of the heat-insulating cover are located within the water storage tanks. The water storage tanks provide a water seal for the heat-insulating cover. A lifting frame is provided on the frame body, and a lifting mechanism for raising and lowering the heat-insulating cover is provided at the top of the lifting frame. The lifting frame is also equipped with a mechanism for limiting the movement of the heat-insulating cover. The position limiting mechanism, the heat insulation cover is provided with a condensate collection device connected to the water storage tank, the two sides of the frame body are provided with smoke collection hoods connected to the heat insulation cover, the smoke collection hood is provided with an air pump above the smoke collection hood, the smoke collection hood and the air pump are connected by an exhaust pipe, the smoke collection hood is provided with a first mesh plate and a second mesh plate located at the upper end of the first mesh plate, the first mesh plate and the second mesh plate are provided with a spraying mechanism, and the smoke collection hood is provided with a drive mechanism for driving the spraying mechanism to reciprocate.

[0007] The present invention is further configured such that: the first mesh plate includes a left mesh plate and a right mesh plate, the ends of the left and right mesh plates that are close to each other are rotatably engaged with the smoke hood, the ends of the left and right mesh plates that are far from each other abut against the inner wall of the smoke hood, a drive rod is fixedly connected to the right mesh plate, a drive gear is fixedly connected to the drive rod, a driven gear is fixedly connected to the left mesh plate, the drive gear and the driven gear mesh, and the second mesh plate is fixedly connected to the inner wall of the smoke hood.

[0008] The present invention is further configured such that: one end of the drive rod extends out of the smoke collection hood and is fixedly connected to a crank handle; the smoke collection hood is provided with a first limiting block, and the first limiting block is provided with a limiting groove that engages with the crank handle.

[0009] The invention is further configured such that: the spraying mechanism includes two support rods fixedly connected between the first mesh plate and the second mesh plate; the two support rods are provided with sliding grooves on opposite sides; a support base is installed between the two support rods; symmetrically distributed protrusions are fixedly connected to the support base; the protrusions slide in cooperation with the sliding grooves; symmetrically distributed spraying pipes are fixedly connected to the lower end of the support base; and a gas delivery hose is installed on one side of the smoke hood, the gas delivery hose being connected to the upper end of the support base.

[0010] The present invention is further configured such that: the driving mechanism includes a first driving motor fixedly connected to the smoke collection hood, the output end of the first driving motor extends into the smoke collection hood and is fixedly connected to a lead screw, the lower end of the support base is fixedly connected to a connecting block, and the lead screw passes through the connecting block and is threadedly engaged with the connecting block.

[0011] The present invention is further configured such that: a guide plate is fixedly connected to the lower end of the smoke collection hood located on the first mesh plate; a collection trough is fixedly connected to the lower end of the guide plate; a drain pipe is provided at the lower end of the collection trough; the drain pipe extends out of the smoke collection hood and connects to the water storage tank; and a heat sink is fixedly connected to the side wall of the condenser pipe.

[0012] The present invention is further configured such that: the driving mechanism includes a plurality of second driving motors fixedly connected to the top of the lifting frame, the output end of the second driving motor is fixedly connected to a driving wheel, a lifting rope is wound on the driving wheel, and a hook for the lifting rope to pass through is provided on the heat insulation cover.

[0013] The present invention is further configured such that: the limiting mechanism includes a rotary cylinder mounted on a lifting frame, one end of the rotary cylinder is fixedly connected to a second limiting block, and a sensor is mounted on the lower end of the lifting frame of the rotary cylinder, the sensor being electrically connected to the rotary cylinder.

[0014] The present invention is further configured such that: the upper end of the heat insulation cover is provided with an air outlet, the condensate collection device includes a three-way pipe fixedly connected to the air outlet, and square condensate pipes are fixed at both ends of the three-way pipe. The condensate pipes are in contact with the upper surface of the heat insulation cover, and the lower end of the condensate pipes is connected to a water storage tank.

[0015] The invention is further configured such that: a water collection tank is provided on one side of the main frame body, the water collection tank is connected to the water storage tank, a steam storage chamber is provided on one side of the main frame body, a plurality of diversion pipes are provided on the steam storage chamber, a plurality of equally spaced air inlets are provided on the side wall of the main frame body, the air inlets are connected to the diversion pipes one by one, and the air delivery hose is connected to the steam storage chamber.

[0016] In summary, the present invention has the following beneficial effects:

[0017] By making the insulation cover detachable, when damage occurs inside the tunnel-type steaming equipment, the insulation cover can be lifted by the lifting mechanism, which facilitates the maintenance of the inside of the tunnel-type steaming equipment. At the same time, by activating the limit mechanism, the lifted insulation cover can be limited to prevent it from falling suddenly and causing injury to the staff.

[0018] When the maintenance is completed and the system is working normally, water is injected into the water storage tank, which can play a water-sealing role for the insulation cover. The water in the water storage tank can absorb the steam in the insulation cover, thereby effectively preventing steam leakage and the rise in the outside temperature. At the same time, by setting up a condensate collection device, the steam can be condensed and flowed back into the water storage tank to replenish the water in the water storage tank, thus increasing the recycling of steam.

[0019] Meanwhile, by setting up smoke collection hoods on both sides of the main frame, excess steam in the steaming equipment can be discharged from the smoke collection hoods on both sides. The first and second mesh plates located inside the smoke collection hoods can block the moisture in the steam, thereby reducing the humidity in the steam after it passes through the mesh plates. After the smoke collection hoods have been working for a period of time, water will condense in the mesh of the first and second mesh plates due to tension, making it difficult for steam to flow. Therefore, the driving mechanism drives the spraying mechanism to spray the mesh plates back and forth, breaking the tension of the water on the first and second mesh plates, so that the steam can pass through the first and second mesh plates smoothly. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a tunnel-type steaming device for xiaolongbao (soup dumplings) according to the present invention. Figure 1 ;

[0021] Figure 2 for Figure 1 Enlarged view of A in the middle;

[0022] Figure 3 for Figure 1 Enlarged view of B in the middle;

[0023] Figure 4 This is a schematic diagram of the structure of a tunnel-type steaming device for xiaolongbao (soup dumplings) according to the present invention. Figure 2 ;

[0024] Figure 5 for Figure 4 Enlarged view of C;

[0025] Figure 6 for Figure 4 Enlarged view of B in the middle;

[0026] Figure 7 This is a schematic diagram of the structure of the lifting rope and hook in this invention;

[0027] Figure 8 This is a schematic diagram of the condensation collection device in this invention;

[0028] Figure 9 This is a broken view of the condensation collection device and the heat insulation cover in this invention;

[0029] Figure 10 This is a diagram showing the internal structure of the smoke hood in this invention;

[0030] Figure 11 This is an internal cross-sectional view of the smoke collection hood in this invention;

[0031] Figure 12 This is a schematic diagram of the limiting mechanism in this invention;

[0032] Figure 13 This is a cross-sectional view of the limiting mechanism in this invention.

[0033] Reference numerals: 1. Main frame; 2. Insulation cover; 3. Water storage tank; 4. Lifting frame; 5. Limiting mechanism; 6. Condensate collection device; 7. Smoke hood; 8. Air pump; 9. Exhaust pipe; 10. Second mesh plate; 11. Left mesh plate; 12. Right mesh plate; 13. Drive rod; 14. Drive gear; 15. Driven gear; 16. Handle; 17. First limiting block; 18. Limiting groove; 19. Support rod; 20. Slide groove; 21. Support base; 22. Protrusion; 23. Injection pipe; 24. Gas delivery hose; 25. First drive motor; 26. Lead screw ; 27. Connecting block; 28. Guide plate; 29. ​​Collection tank; 30. Drain pipe; 31. Second drive motor; 32. Drive wheel; 33. Lifting rope; 34. Lifting hook; 35. Rotary cylinder; 36. Second limit block; 37. Sensor; 38. Air outlet; 39. T-pipe; 40. Square condenser tube; 41. Heat sink; 42. Water collection tank; 43. Steam storage chamber; 44. Diverter pipe; 45. Air inlet; 46. Tension cylinder; 47. Threaded rod; 48. Third limit block; 49. Limiting plate; 50. Annular protrusion; 51. Limiting groove. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In one possible embodiment, please refer to Figure 1 and Figure 7 As shown, a tunnel-type steaming equipment for xiaolongbao (soup dumplings) includes a frame body 1 and a heat preservation cover 2 installed on the frame body 1. The heat preservation cover 2 is detachably installed on the frame body 1. A lifting frame 4 is provided on the frame body 1. A lifting mechanism for raising and lowering the heat preservation cover 2 is provided on the top of the lifting frame 4. The lifting mechanism can raise and lower the heat preservation cover 2, thereby facilitating maintenance and cleaning of the inside of the heat preservation cover 2 by the staff. The driving mechanism includes several second drive motors 31 fixedly connected to the top of the lifting frame 4. A drive wheel 32 is fixedly connected to the output end of the second drive motor 31. A lifting rope 33 is wound on the drive wheel 32. A hook 34 is provided on the heat preservation cover 2 for the lifting rope 33 to pass through. The second drive motor 31 drives the drive wheel 32 to rotate, thereby raising and lowering the heat preservation cover 2 by winding the lifting rope 33 on the drive wheel 32.

[0036] For further details, please refer to Figure 1 and Figure 3As shown, the lifting frame 4 is equipped with a limiting mechanism 5 for limiting the insulation cover 2. After the insulation cover 2 is lifted, the limiting mechanism 5 limits the insulation cover 2, thereby improving the overall safety of the lifting mechanism and preventing the insulation cover 2 from suddenly falling and causing injury to the staff. The limiting mechanism 5 includes a rotary cylinder 35 installed on the lifting frame 4. One end of the rotary cylinder 35 is fixedly connected to a second limiting block 36. A sensor 37 is installed at the lower end of the rotary cylinder 35 on the lifting frame 4. The sensor 37 is electrically connected to the rotary cylinder 35. When the lifting mechanism lifts the insulation cover 2, the sensor 37 senses that the insulation cover 2 is rising and starts after a 5-second delay, driving the rotary cylinder 35 to work. The rotary cylinder 35 drives the second limiting block 36 to rotate, so that the second limiting block 36 abuts against the lower end of the insulation cover 2, thereby limiting the insulation cover 2 and preventing safety hazards caused by the insulation cover 2 falling.

[0037] In another feasible embodiment, further, please refer to Figure 1 , Figure 12 and Figure 13 As shown, the limiting mechanism 5 includes a tension cylinder 46 mounted on the lifting frame 4. The output end of the tension cylinder 46 is fixedly connected to a threaded rod 47. The lifting frame 4 is provided with a third limiting block 48, which is rotatably engaged with the lifting frame 4. An annular protrusion 50 is provided on the third limiting block 48. An annular groove 51 for limiting the annular protrusion 50 is provided inside the lifting frame 4. The lead screw 26 passes through the center point of the annular protrusion 50 and is threadedly engaged with the third limiting block 48. After the sensor 37 is activated, the tension cylinder 46 drives the threaded rod 47 to slide. Through the threaded engagement between the threaded rod 47 and the third limiting block 48, the third limiting block 48 is driven to rotate. When the tension cylinder 46 is stretched outward to the farthest distance, the third limiting block 48 just abuts against the bottom of the insulation cover 2, thus limiting the insulation cover 2. A limiting plate 49 is provided at the top of the threaded rod 47 to prevent the third limiting block 48 from disengaging from the threaded rod 47.

[0038] For further details, please refer to [link / reference]. Figure 4 and Figure 6As shown, the main frame 1 is equipped with symmetrically distributed water storage tanks 3. When the insulation cover 2 is lowered, both ends of the insulation cover 2 are located in the water storage tanks 3. The water storage tanks 3 are filled with water to watertighten the insulation cover 2. The water in the water storage tanks 3 reduces the gap between the insulation cover 2 and the main frame 1. Thus, when the steaming equipment is working, the water in the water storage tanks 3 can absorb the steam in the insulation cover 2, thereby effectively preventing steam leakage and the rise in the outside temperature. The insulation cover 2 is equipped with a condensate collection device 6 connected to the water storage tanks 3. The water in the water storage tanks 3 will heat up as the steam is absorbed, thereby reducing evaporation. The excess steam in the insulation cover 2 can be recovered and reused through the condensate collection device 6. The condensate collected by the condensate collection device 6 is injected into the water storage tanks 3 for replenishment, thereby increasing the recycling of steam.

[0039] For further details, please refer to Figure 1 , Figure 4 , Figure 5 , Figure 8 and Figure 9 As shown, the upper end of the heat insulation cover 2 is provided with an air outlet 38. The condensate collection device 6 includes a three-way pipe 39 fixedly connected to the air outlet 38. Square condenser pipes 40 are fixed at both ends of the three-way pipe 39. The condenser pipes are in contact with the upper surface of the heat insulation cover 2. The lower end of the condenser pipes is connected to the water storage tank 3. The steam in the heat insulation cover 2 will enter the three-way pipe 39 through the air outlet 38, and then flow into the square condenser pipes 40 on both sides of the three-way pipe 39. The steam will be re-condensed into liquid in the condenser pipes and flow into the water storage tank 3 to replenish the water storage tank 3. Heat sinks 41 are fixedly connected to the side wall of the condenser pipes. The heat sinks 41 can accelerate the heat dissipation of the condenser pipes and improve the heat dissipation capacity of the condenser pipes.

[0040] For further details, please refer to Figure 1 and Figure 10 As shown, smoke collection hoods 7 connected to insulation covers 2 are provided on both sides of the main frame 1. The smoke collection hoods 7 absorb excess steam, thereby reducing steam leakage. An air pump 8 is provided above the smoke collection hoods 7. The smoke collection hoods 7 and the air pump 8 are connected by an exhaust pipe 9. A first mesh plate and a second mesh plate 10 located at the upper end of the first mesh plate are provided inside the smoke collection hoods 7. When the smoke collection hoods 7 are working, the first mesh plate and the second mesh plate 10 can fully condense the moisture in the steam, ensuring the isolation effect of the first mesh plate and the second mesh plate 10 on the moisture, thereby reducing the humidity in the steam after being isolated by the first mesh plate and the second mesh plate 10, and reducing damage to the air pump 8.

[0041] For further details, please refer to Figure 1 , Figure 2 , Figure 10 and Figure 11As shown, the first mesh plate includes a left mesh plate 11 and a right mesh plate 12. The ends of the left and right mesh plates 11 and 12 that are close to each other are rotatably engaged with the smoke hood 7, while the ends that are far apart from each other abut against the inner wall of the smoke hood 7. A drive rod 13 is fixedly connected to the right mesh plate 12, and a drive gear 14 is fixedly connected to the drive rod 13. A driven gear 15 is fixedly connected to the left mesh plate 11, and the drive gear 14 meshes with the driven gear 15. One end of the drive rod 13 extends out of the smoke hood 7 and is fixedly connected to a crank handle 16. The second mesh plate 10 is fixedly connected to the inner wall of the smoke hood 7. When there is too much steam inside the smoke hood 7 and it cannot be discharged in time, the crank handle 16 can be rotated to release the steam. The crank handle 16 is cranked, which in turn drives the drive rod 13, which is fixedly connected to the crank handle 16, to rotate. This drives the drive gear 14, which in turn drives the driven gear 15, which meshes with the drive gear 14, to rotate. This causes the left mesh plate 11 and the right mesh plate 12 to rotate synchronously in opposite directions. This separates the ends of the left mesh plate 11 and the right mesh plate 12 from the inner wall of the smoke hood 7, thereby increasing the steam flow area and accelerating the steam discharge. The smoke hood 7 is provided with a first limiting block 17, which has a limiting groove 18 that engages with the crank handle 16. After the crank handle 16 is rotated, it engages with the limiting groove 18, thereby ensuring the stability of the left mesh plate 11 and the right mesh plate 12.

[0042] For further details, please refer to Figure 10 and Figure 11 As shown, a spraying mechanism is provided between the first mesh plate and the second mesh plate 10. The smoke hood 7 is provided with a drive mechanism for driving the spraying mechanism to reciprocate. After the smoke hood 7 has been working for a period of time, water will condense in the mesh holes of the first mesh plate and the second mesh plate 10 due to tension, making it difficult for steam to flow. Thus, the drive mechanism drives the spraying mechanism to spray the mesh plate back and forth, breaking the tension of the water on the first mesh plate and the second mesh plate 10, so that steam can pass smoothly through the first mesh plate and the second mesh plate 10.

[0043] For further details, please refer to Figure 10 and Figure 11As shown, the spraying mechanism includes two support rods 19 fixedly connected between the first mesh plate and the second mesh plate 10. A sliding groove 20 is provided on one side of each support rod 19. A support base 21 is installed between the two support rods 19. Symmetrically distributed protrusions 22 are fixedly connected to the support base 21. The protrusions 22 slide in conjunction with the sliding groove 20. By limiting the protrusions 22 through the sliding groove 20, the support base 21 is supported, allowing it to slide only along the direction of the sliding groove 20. Symmetrically distributed spray nozzles are fixedly connected to the lower end of the support base 21. The pressure pipe 23 and the spray pipe 23 spray pressure at regular intervals. A gas supply hose 24 is installed on one side of the smoke hood 7. The gas supply hose 24 is connected to the upper end of the support base 21. The gas supply hose 24 passes through the upper end of the second mesh plate 10 and is installed with the support base 21 through the gap between the two second mesh plates 10. At the same time, it is connected to the spray pipe 23. Then, the steam is input into the spray pipe 23 through the input hose and then sprayed through the spray pipe 23 to break the tension of the water on the first mesh plate and the second mesh plate 10, so that the steam can pass through smoothly.

[0044] For further details, please refer to Figure 10 and Figure 11 As shown, the driving mechanism includes a first drive motor 25 fixedly connected to the smoke hood 7. The output end of the first drive motor 25 extends into the smoke hood 7 and is fixedly connected to a lead screw 26. The lower end of the support base 21 is fixedly connected to a connecting block 27. The lead screw 26 passes through the connecting block 27 and is threadedly engaged with the connecting block 27. The driving mechanism starts at regular intervals after the smoke hood 7 has been working for a period of time. Through the output of the first drive motor 25, the lead screw 26 is driven to rotate, which in turn drives the support base 21, which is threadedly engaged with the lead screw 26, to move along the lead screw 26. By changing the rotation direction of the first drive motor 25, the support base 21 is driven to move forward and backward, repeatedly rinsing the first mesh plate and the second mesh plate 10. At the same time, the first drive motor 25 is set at regular intervals and works synchronously with the spray pipe 23.

[0045] For further details, please refer to Figure 1 , Figure 2 , Figure 10 and Figure 11 As shown, a guide plate 28 is fixedly connected to the lower end of the smoke collection hood 7 located on the first mesh plate. A collection tank 29 is fixedly connected to the lower end of the guide plate 28. A drain pipe 30 is provided at the lower end of the collection tank 29. The drain pipe 30 passes through the smoke collection hood 7 and connects to the water storage tank 3. The collection tank 29 collects the filtered water to prevent water from dripping onto the food and affecting its taste. By draining the separated water into the water storage tank 3, the recycling of water can be further improved.

[0046] For further information, please refer to [link / reference]. Figure 1 and Figure 4As shown, a water collection tank 42 is provided on one side of the main frame 1, and a water inlet pipe for replenishing water to the water collection tank 42 is provided on one side of the water collection tank 42. The water collection tank 42 is connected to the water storage tank 3, and the water in the water storage tank 3 can be further replenished through the water collection tank 42. A steam storage chamber 43 is provided on one side of the main frame 1, and several diversion pipes 44 are provided on the steam storage chamber 43. Several air inlets 45 are provided on the side wall of the main frame 1 at equal intervals. The air inlets 45 are connected to the diversion pipes 44 one by one. By setting up the steam storage chamber 43, steam is first input into the steam storage chamber 43, and then the steam is input into various parts of the steaming equipment, thereby ensuring the stability of the input steam. The air delivery hose 24 is connected to the steam storage chamber 43.

[0047] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A tunnel-type steaming device for xiaolongbao (soup dumplings), comprising a frame body (1) and a heat preservation cover (2) installed on the frame body (1), characterized in that: The frame body (1) is provided with symmetrically distributed water storage tanks (3). The two ends of the heat insulation cover (2) are located in the water storage tanks (3). The water storage tanks (3) provide a water seal for the heat insulation cover (2). The frame body (1) is provided with a lifting frame (4). The top of the lifting frame (4) is provided with a lifting mechanism for raising and lowering the heat insulation cover (2). The lifting frame (4) is provided with a limiting mechanism (5) for limiting the heat insulation cover (2). The heat insulation cover (2) is provided with a condensate collection system connected to the water storage tanks (3). The device (6) has smoke collection hoods (7) connected to the heat insulation cover (2) on both sides of the frame body (1). An air pump (8) is provided above the smoke collection hood (7). The smoke collection hood (7) and the air pump (8) are connected by an exhaust pipe (9). A first mesh plate and a second mesh plate (10) located at the upper end of the first mesh plate are provided inside the smoke collection hood (7). A spraying mechanism is provided between the first mesh plate and the second mesh plate (10). A drive mechanism for driving the spraying mechanism to reciprocate is provided on the smoke collection hood (7). The first mesh plate includes a left mesh plate (11) and a right mesh plate (12). The ends of the left mesh plate (11) and the right mesh plate (12) that are close to each other are rotatably engaged with the smoke hood (7). The ends of the left mesh plate (11) and the right mesh plate (12) that are far apart from each other abut against the inner wall of the smoke hood (7). A drive rod (13) is fixedly connected to the right mesh plate (12). A drive gear (14) is fixedly connected to the drive rod (13). A driven gear (15) is fixedly connected to the left mesh plate (11). The drive gear (14) meshes with the driven gear (15). One end of the drive rod (13) extends out of the smoke hood (7) and is fixedly connected to a crank handle (16). The second mesh plate (10) is fixedly connected to the inner wall of the smoke hood (7). The spraying mechanism includes two support rods (19) fixedly connected between the first mesh plate and the second mesh plate (10). The two support rods (19) are provided with a sliding groove (20) on one side facing each other. A support base (21) is installed between the two support rods (19). Symmetrically distributed protrusions (22) are fixedly connected on the support base (21). The protrusions (22) slide with the sliding groove (20). Symmetrically distributed spraying pipes (23) are fixedly connected to the lower end of the support base (21). A gas delivery hose (24) is installed on one side of the smoke hood (7). The gas delivery hose (24) is connected to the upper end of the support base (21). The driving mechanism includes a first drive motor (25) fixedly connected to the smoke hood (7), the output end of the first drive motor (25) extends into the smoke hood (7) and is fixedly connected to a lead screw (26), the lower end of the support base (21) is fixedly connected to a connecting block (27), the lead screw (26) passes through the connecting block (27) and is threadedly engaged with the connecting block (27); The smoke hood (7) is fixedly connected to a guide plate (28) at the lower end of the first mesh plate. The lower end of the guide plate (28) is fixedly connected to a collection trough (29). The lower end of the collection trough (29) is provided with a drain pipe (30). The drain pipe (30) passes through the smoke hood (7) and connects to the water storage tank (3).

2. The tunnel-type steaming equipment for xiaolongbao according to claim 1, characterized in that: The smoke hood (7) is provided with a first limiting block (17), and the first limiting block (17) is provided with a limiting groove (18) that engages with the crank handle (16).

3. The tunnel-type steaming equipment for xiaolongbao according to claim 1, characterized in that: The drive mechanism includes several second drive motors (31) fixedly connected to the top of the lifting frame (4). The output end of the second drive motor (31) is fixedly connected to a drive wheel (32). A lifting rope (33) is wound on the drive wheel (32). A hook (34) is provided on the heat insulation cover (2) for the lifting rope (33) to pass through.

4. The tunnel-type steaming equipment for xiaolongbao according to claim 1, characterized in that: The limiting mechanism (5) includes a rotary cylinder (35) mounted on a lifting frame (4). A second limiting block (36) is fixedly connected to one end of the rotary cylinder (35). A sensor (37) is mounted on the lower end of the lifting frame (4) at the rotary cylinder (35). The sensor (37) is electrically connected to the rotary cylinder (35).

5. The tunnel-type steaming equipment for xiaolongbao according to claim 1, characterized in that: The upper end of the heat insulation cover (2) is provided with an air outlet (38). The condensate collection device (6) includes a three-way pipe (39) fixedly connected to the air outlet (38). Both the left and right ends of the three-way pipe (39) are fixed with square condenser pipes (40). The condenser pipes are in contact with the upper surface of the heat insulation cover (2). The lower end of the condenser pipes is connected to the water storage tank (3). The side wall of the condenser pipes is fixedly connected with heat sinks (41).

6. The tunnel-type steaming equipment for xiaolongbao according to claim 1, characterized in that: A water collection tank (42) is provided on one side of the main body of the frame (1). The water collection tank (42) is connected to the water storage tank (3). A steam storage chamber (43) is provided on one side of the main body of the frame (1). Several diversion pipes (44) are provided on the steam storage chamber (43). Several air inlets (45) are provided on the side wall of the main body of the frame (1) at equal intervals. The air inlets (45) are connected to the diversion pipes (44) one by one. The air delivery hose (24) is connected to the steam storage chamber (43).

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