Cooling device for petrochemical industry production

Abstract

The utility model relates to the technical field of petrochemical processing, and discloses a cooling device for petrochemical production, which comprises a bottom plate, side plates are symmetrically and fixedly mounted at the top of the bottom plate, a controller is arranged on the outer side of one side plate, a stirring component is arranged between the side plates, and a cooling component is arranged outside the stirring component. Petrochemical materials needing to be cooled are conveyed into the cooling cylinder through the feeding pipe by opening the pipe cover at the top end of the feeding pipe, then the pipe cover is screwed to prevent the materials from leaking, the motor is started, and the output end of the motor drives the stirring shaft connected with the motor to rotate; and the stirring rods which are equidistantly mounted on the circumference of the outer wall of the stirring shaft rotate along with the rotation of the stirring shaft, so that the petrochemical materials in the cooling cylinder are stirred, and the effect that the subsequent cooling process can be more efficiently carried out is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of petroleum chemical processing, specifically to a cooling device for petroleum chemical production. BACKGROUND

[0002] In the field of petroleum chemical production, the cooling link is a crucial step in many process flows. Many petroleum chemical reactions release a large amount of heat, and if these heat cannot be removed in time and effectively, not only will it affect the progress of the reaction, reduce the quality and yield of the product, but also may cause safety accidents, causing serious threat to the life safety of production personnel and the property safety of enterprises.

[0003] The traditional petroleum chemical cooling method has many shortcomings. Some cooling devices lack effective stirring function, and the petroleum chemical materials are in a relatively static state during the cooling process, resulting in uneven heat distribution inside the materials. This makes the cooling speed of part of the materials too slow, and a longer cooling time is needed to reach the required temperature, which seriously affects the production efficiency. Moreover, uneven cooling may also cause changes in the physical and chemical properties of the materials, affecting the quality stability of the products. SUMMARY

[0004] The utility model aims at providing a cooling device for petroleum chemical production, solving the technical problem that petroleum chemical materials are in a relatively static state during the cooling process, resulting in uneven heat distribution inside the materials, and achieving the purpose of improving the cooling of petroleum chemical materials.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a cooling device for petroleum chemical production, comprising a bottom plate, the top of the bottom plate is symmetrically fixedly installed with side plates, the outside of one of the side plates is provided with a controller, a stirring assembly is arranged between the side plates, and a cooling assembly is arranged outside the stirring assembly.

[0006] Preferably, the stirring assembly comprises a connecting column fixedly installed on the inner side of the side plate, and a motor fixedly installed on the outer side of the other side plate.

[0007] Preferably, the connecting column is fixedly installed with a cooling cylinder, the inside of the cooling cylinder is movably provided with a stirring shaft, the two ends of the stirring shaft are movably penetrated through the inner wall of the cooling cylinder, the inner side of the connecting column, the inner side of the side plate and extend to the outer side of the side plate, and are rotatably connected with the cooling cylinder, the connecting column and the side plate through bearings respectively, the output end of the motor is connected with one end of the stirring shaft, the outer wall of the stirring shaft is circumferentially and equidistantly installed with stirring rods, the top of the cooling cylinder is communicatively provided with a feeding pipe, the top end of the feeding pipe is threadedly connected with a pipe cover, the bottom of the cooling cylinder is communicatively provided with a discharging pipe, the other end of the discharging pipe is penetrated through the inner side of the other side plate and extends to the outer side of the side plate, and the middle end of the discharging pipe is provided with a valve.

[0008] The motor drives the stirring shaft to rotate, and the stirring rods distributed equidistantly on the outer wall of the stirring shaft rotate, so that the petrochemical materials in the cooling cylinder are fully stirred.

[0009] Preferably, the cooling assembly comprises: a water cooling component, which is sleeved on the outside of the stirring assembly; and a dismounting component, which is arranged on one side of the water cooling component.

[0010] Preferably, the water cooling component comprises: a protective frame, which is fixedly sleeved on the outside of the cooling cylinder; and a water tank, which is fixedly installed on the top of the bottom plate.

[0011] Preferably, the inside of the protective frame is provided with a circulating pipe, the two ends of the circulating pipe are respectively penetrated through the bottom of the inner wall of the protective frame and extend to the bottom of the outer wall of the protective frame, one end of the circulating pipe is in communication with the water tank, the other end of the circulating pipe is communicatively provided with a pump, the input end of the pump is communicatively provided with a water pumping pipe, the other end of the water pumping pipe is penetrated through the top of the water tank and extends to the inside of the water tank, the top of the water tank is communicatively provided with a water inlet pipe, and the two sides of the water tank are respectively provided with semiconductor condenser sheets, one side of the outer wall of the protective frame is equidistantly provided with an air outlet, and the other side of the protective frame is provided with an air inlet.

[0012] After the pump is started, the cooling liquid in the water tank is pumped out through the water pumping pipe, so as to flow in the circulating pipe. The circulating pipe is surrounded in the protective frame outside the cooling cylinder, and the cooling liquid exchanges heat with the petrochemical materials in the cooling cylinder in the flowing process.

[0013] Preferably, the dismounting component comprises: an air inlet frame, which is communicatively arranged on the other side of the protective frame; a mounting plate, which is fixedly installed on the inside of the air inlet frame; and clamping frames, which are symmetrically and fixedly installed on the two sides of the outer wall of the air inlet frame.

[0014] Preferably, the inside of the mounting plate is symmetrically provided with a fan, the inside of the air inlet frame is movably provided with a dust screen cloth, the outside of the dust screen cloth is symmetrically and fixedly provided with a connecting block, the other side of the connecting block is fixedly provided with a dustproof plate, the outside of the dustproof plate is symmetrically and fixedly provided with a connecting plate, the inside of the connecting plate is fixedly provided with a clamping block one, the clamping block one is matched with a clamping frame, the outside of the clamping block one is provided with a movable slot, the outside of the clamping frame is provided with a clamping opening, the movable slot and the clamping opening are in communication, the other side of the clamping block one is provided with a sliding opening, the inside of the clamping block one is fixedly provided with a guide column, the outside wall of the guide column is slidably provided with a clamping block, the clamping block is clamped and connected with the clamping frame through the clamping opening, the outside wall of the guide column is provided with a spring, one end of the spring is fixedly connected with the clamping block one, the other end of the spring is fixedly connected with the clamping block, and the outside of the clamping block is fixedly provided with a push piece.

[0015] The fan symmetrically arranged in the inside of the mounting plate can accelerate air flow after being started.

[0016] The utility model provides a cooling device for petroleum chemical production.

[0017] (1), the utility model discloses a pipe cover is opened at the top of feeding pipe, and the petroleum chemical material that needs cooling is transported to the cooling cylinder through the feeding pipe, then the pipe cover is screwed tightly, prevents material leakage, starts the motor, and the motor output end drives the stirring shaft rotation connected therewith, since the stirring shaft is rotationally connected with the cooling cylinder, connecting column and side plate through the bearing, can guarantee its stable rotation, and the stirring bar of equidistant installation on the outer wall of stirring shaft rotates along with the rotation of stirring shaft, stirs the petroleum chemical material in the cooling cylinder, reaches the effect that the subsequent cooling process is more efficient.

[0018] (2), the utility model discloses starting the pump, and the pump extracts the cooling liquid in the water tank through the water pump, and the cooling liquid flows through the circulating pipe, and the circulating pipe is encircled in the protection frame outside the cooling cylinder, when the cooling liquid flows in the circulating pipe, exchanges heat with the material in the cooling cylinder, absorbs the heat of material, thereby reduces the temperature of material, and the cooling liquid after heat exchange flows back to the water tank, forms a circulating cooling process, reaches the effect of improving the cooling of petroleum chemical material. ACCURACY OF DRAWINGS

[0019] Figure 1 It is the whole structure perspective diagram of the utility model;

[0020] Figure 2 It is the structure section view of the stirring subassembly of the utility model;

[0021] Figure 3 It is the cooling assembly structure sectional view of the utility model;

[0022] Figure 4 It is the dismounting part structure sectional view of the utility model.

[0023] In the drawing: 1 bottom plate, 2 side plate, 3 controller, 4 stirring assembly, 5 cooling assembly;

[0024] 411 connecting column, 412 cooling cylinder, 413 motor, 414 stirring shaft, 415 stirring stick, 416 discharge pipe, 417 valve, 418 feed pipe, 419 pipe cover;

[0025] 51 water cooling part, 511 protection frame, 512 water tank, 513 water inlet pipe, 514 semiconductor condensing piece, 515 circulating pipe, 516 pump, 517 water suction pipe;

[0026] 52 dismounting part, 521 air inlet frame, 522 mounting plate, 523 fan, 524 dustproof cloth, 525 connecting block, 526 dustproof plate, 527 connecting plate, 528 clamping block one, 529 clamping frame, 5211 guide column, 5212 clamping block, 5213 spring, 5214 push piece. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0028] The examples of the described embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as limiting the utility model. EMBODIMENT

[0029] Based on the problem that the petroleum chemical material is in a relatively static state in the cooling process, resulting in uneven heat distribution inside the material, the preferred embodiment of the cooling device for petroleum chemical production provided by the utility model solves the problem. Figures 1-4As shown: a cooling device for petrochemical production, including bottom plate 1, the top of bottom plate 1 is fixedly installed with side plate 2 symmetrically, the outside of one of side plate 2 is provided with controller 3, stirring assembly 4 is arranged between side plate 2, the outside of stirring assembly 4 is provided with cooling assembly 5, and stirring assembly 4 includes connecting column 411, which is fixedly installed on the inside of side plate 2, motor 413, which is fixedly installed on the outside of another side plate 2, cooling cylinder 412, which is fixedly installed between connecting column 411, stirring shaft 414, which is movably arranged in the inside of cooling cylinder 412, the two ends of stirring shaft 414 are movably penetrated through the inner wall of cooling cylinder 412, the inside of connecting column 411 and the inside of side plate 2 and extend to the outside of side plate 2 and are rotatably connected with cooling cylinder 412, connecting column 411 and side plate 2 through bearings, the output end of motor 413 is connected with one end of stirring shaft 414, stirring stick 415 is installed on the outer wall of stirring shaft 414 at equal intervals, feeding pipe 418 is communicated at the top of cooling cylinder 412, pipe cover 419 is screw-connected to the top end of feeding pipe 418, discharge pipe 416 is communicated at the bottom of cooling cylinder 412, the other end of discharge pipe 416 is penetrated through the inside of another side plate 2 and extends to the outside of side plate 2, and valve 417 is arranged in the middle end of discharge pipe 416.

[0030] Further, in the embodiment, the pipe cover 419 at the top end of the feeding pipe 418 is opened, the petrochemical material to be cooled is conveyed into the cooling cylinder 412 through the feeding pipe 418, then the pipe cover 419 is screwed tightly to prevent material leakage, the motor 413 is started, the output end of the motor 413 drives the stirring shaft 414 connected therewith to rotate, the stirring shaft 414 is rotatably connected with the cooling cylinder 412, the connecting column 411 and the side plate 2 through bearings, so that it can rotate stably, and the stirring stick 415 installed on the outer wall of the stirring shaft 414 at equal intervals rotates with the rotation of the stirring shaft 414 to stir the petrochemical material in the cooling cylinder 412. Embodiment

[0031] On the basis of the first embodiment, the preferred embodiment of the cooling device for petrochemical production provided by the utility model comprises Figures 1-4The cooling assembly 5 comprises: a water cooling part 51 sleeved outside the stirring assembly 4; and a dismounting part 52 arranged at one side of the water cooling part 51; the water cooling part 51 comprises: a protective frame 511 fixedly sleeved outside the cooling cylinder 412; a water tank 512 fixedly installed on the top of the bottom plate 1; the inside of the protective frame 511 is provided with a circulating pipe 515, both ends of the circulating pipe 515 respectively penetrate through the bottom of the inner wall of the protective frame 511 and extend to the bottom of the outer wall of the protective frame 511, one end of the circulating pipe 515 is communicated with the water tank 512, the other end of the circulating pipe 515 is communicated and arranged with a water pump 516, the input end of the water pump 516 is communicated and arranged with a water suction pipe 517, the other end of the water suction pipe 517 penetrates through the top of the water tank 512 and extends to the inside of the water tank 512, the top of the water tank 512 is communicated and arranged with a water inlet pipe 513, both sides of the water tank 512 are respectively arranged with a semiconductor condenser 514, and the outer wall of the protective frame 511 is equidistantly provided with an air outlet on one side, and the protective frame 511 is provided with an air inlet on the other side.

[0032] Further, in the embodiment, the water pump 516 is started, the water pump 516 draws the cooling liquid in the water tank 512 out through the water suction pipe 517, the cooling liquid flows through the circulating pipe 515, the circulating pipe 515 is arranged around the protective frame 511 outside the cooling cylinder 412, the cooling liquid exchanges heat with the material in the cooling cylinder 412 when flowing in the circulating pipe 515, absorbs the heat of the material, thereby reducing the temperature of the material, the cooling liquid after heat exchange flows back to the water tank 512, and a circulating cooling process is formed, the semiconductor condensers 514 arranged on both sides of the water tank 512 refrigerate the cooling liquid in the water tank 512, so that the cooling liquid maintains a lower temperature, and good cooling effect is ensured in the circulating cooling process, the water inlet pipe 513 on the top of the water tank 512 can be used for supplementing the cooling liquid, and the fan 523 in the mounting plate 522 is started, air enters the protective frame 511 from the air inlet frame 521 and is discharged through the air outlet on the other side of the protective frame 511. Embodiment

[0033] On the basis of the embodiments one and two, the preferable embodiment of the cooling device for petroleum chemical production provided by the utility model like Figures 1-4As shown: disassembly parts 52 includes: air inlet frame 521, communication is arranged in the other side of the protective frame 511; mounting plate 522, fixedly installed in the inside of air inlet frame 521; Clamping frame 529, symmetrically fixedly installed on both sides of the outer wall of air inlet frame 521; The inside of mounting plate 522 is provided with fan 523 symmetrically, the inside of air inlet frame 521 movably provides dust screen cloth 524, the outside of dust screen cloth 524 is fixedly installed with connecting block 525 symmetrically, the other side of connecting block 525 is fixedly installed with dustproof plate 526, the outside of dustproof plate 526 is fixedly installed with connecting plate 527 symmetrically, the inside of connecting plate 527 is fixedly installed with clamping block one 528, clamping block one 528 is matched with clamping frame 529, the outside of clamping block one 528 is provided with movable slot, the outside of clamping frame 529 is provided with clamping mouth, movable slot is communicated with clamping mouth, the other side of clamping block one 528 is provided with sliding hole, the inside of clamping block one 528 is fixedly installed with guide column 5211, guide column 5211 is slidably sleeved with clamping block 5212, clamping block 5212 is connected with clamping frame 529 through clamping mouth, the outer wall of guide column 5211 is sleeved with spring 5213, one end of spring 5213 is fixedly connected with clamping block one 528, the other end of spring 5213 is fixedly connected with clamping block 5212, the outside of clamping block 5212 is fixedly installed with push piece 5214, push piece 5214 movably penetrates sliding hole.

[0034] Further, in the embodiment, by pushing the push piece 5214, the push piece 5214 drives the clamping block 5212 to slide on the guide column 5211 and compresses the spring 5213, so that the clamping block 5212 is detached from the clamping mouth of the clamping frame 529. At this time, the dustproof plate 526 and the dust screen cloth 524 connected thereto can be taken out from the air inlet frame 521 for cleaning or replacement. When installing, the clamping block one 528 is aligned with the clamping frame 529 and inserted, the clamping frame 529 extrudes the clamping block 5212, so that the clamping block 5212 compresses the spring 5213 and slides along the guide column 5211. When the clamping block one 528 is completely inserted into the clamping frame 529, the spring 5213 restores the elastic deformation and pushes the clamping block 5212 to be connected with the clamping frame 529 through the clamping mouth, thereby completing the installation of the dustproof component.

[0035] In use, open the pipe cover 419 at the top end of the feed pipe 418, deliver the petroleum chemical material to be cooled into the cooling cylinder 412 through the feed pipe 418, then tighten the pipe cover 419 to prevent material leakage, start the motor 413, the output end of the motor 413 drives the stirring shaft 414 connected thereto to rotate, since the stirring shaft 414 is rotationally connected with the cooling cylinder 412, the connecting column 411 and the side plate 2 through bearings, it can rotate stably, the stirring rods 415 installed equidistantly on the outer wall of the stirring shaft 414 rotate with the stirring shaft 414, and the petroleum chemical material in the cooling cylinder 412 is stirred to make the material uniformly mixed, which helps the subsequent cooling process to be carried out more efficiently. The water tank 512 stores cooling liquid, start the pump 516, the pump 516 draws the cooling liquid in the water tank 512 out through the water suction pipe 517, the cooling liquid flows through the circulating pipe 515, the circulating pipe 515 is wrapped around the protective frame 511 outside the cooling cylinder 412, when the cooling liquid flows in the circulating pipe 515, it exchanges heat with the material in the cooling cylinder 412, absorbs the heat of the material, thereby reducing the temperature of the material, the cooling liquid after completing heat exchange flows back to the water tank 512, forming a circulating cooling process, the semiconductor condenser sheets 514 arranged on both sides of the water tank 512 refrigerate the cooling liquid in the water tank 512, so that the cooling liquid maintains a lower temperature, to ensure that the circulating cooling process always has good cooling effect, the water inlet pipe 513 at the top of the water tank 512 can be used to supplement the cooling liquid, the fan 523 in the mounting plate 522 is started, air enters the protective frame 511 from the air inlet frame 521, and is discharged through the air outlet on the other side of the protective frame 511, in the process of air flow, further heat emitted by the circulating pipe 515 and the cooling cylinder 412 is taken away, enhancing the cooling effect, the dust screen cloth 524 and the dust plate 526 arranged in the air inlet frame 521 can prevent dust and other impurities from entering the inside of the protective frame 511, affecting the cooling effect and normal operation of the equipment, when the dust screen cloth 524 and the dust plate 526 need to be cleaned or replaced, the operator pulls the tab 5214, the tab 5214 drives the clamping block 5212 to slide on the guide column 5211 and compresses the spring 5213, so that the clamping block 5212 is detached from the clamping opening of the clamping frame 529, at this time, the dust plate 526 and the dust screen cloth 524 connected therewith can be taken out from the air inlet frame 521 for cleaning or replacement, during installation, the clamping block one 528 is inserted into the clamping frame 529, the clamping frame 529 presses the clamping block 5212 to compress the spring 5213 and slide along the guide column 5211, when the clamping block one 528 is completely inserted into the clamping frame 529, the spring 5213 restores elastic deformation to push the clamping block 5212 to be clamped and connected with the clamping frame 529 through the clamping opening, completing the installation of the dustproof component, when the petroleum chemical material is cooled to a suitable temperature, open the valve 417 at the middle end of the discharge pipe 416, the cooled material is discharged from the cooling cylinder 412 through the discharge pipe 416, for subsequent processing or storage operation, during the whole process,The controller 3 can control the motor 413, the pump 516, the fan 523, the semiconductor condensing sheet 514 and other devices according to preset parameters, so as to realize automation and precision of the cooling process.

[0036] Finally, it should be noted that: the above only for the preferred embodiments of the present application have, and not for limiting the present application, although the foregoing embodiments of the present application have been described in detail, for those skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, shall be included within the scope of the present application.

Claims

1. A cooling device for petrochemical production comprising a bottom plate (1), characterized in that: The top of the bottom plate (1) is symmetrically fixedly installed with side plates (2), the outer side of one of the side plates (2) is provided with a controller (3), stirring assemblies (4) are arranged between the side plates (2), and the outer sides of the stirring assemblies (4) are provided with cooling assemblies (5).

2. The cooling device for petrochemical production according to claim 1, characterized in that: The stirring assembly (4) comprises: A connecting column (411) is fixedly installed on the inner side of the side plate (2); A motor (413) is fixedly installed on the outer side of the other side plate (2).

3. The cooling device for petrochemical production according to claim 2, characterized in that: Cooling cylinders (412) are fixedly installed between the connecting columns (411), stirring shafts (414) are movably arranged in the cooling cylinders (412), the two ends of the stirring shafts (414) respectively movably penetrate the inner wall of the cooling cylinder (412), the inner side of the connecting column (411), the inner side of the side plate (2) and extend to the outer side of the side plate (2), and are respectively rotatably connected with the cooling cylinder (412), the connecting column (411) and the side plate (2) through bearings, the output end of the motor (413) is connected with one end of the stirring shaft (414), stirring rods (415) are circumferentially and equidistantly installed on the outer wall of the stirring shaft (414), a feeding pipe (418) is communicatively arranged on the top of the cooling cylinder (412), a pipe cover (419) is threadedly connected with the top end of the feeding pipe (418), a discharging pipe (416) is communicatively arranged on the bottom of the cooling cylinder (412), the other end of the discharging pipe (416) penetrates the inner side of the other side plate (2) and extends to the outer side of the side plate (2), and a valve (417) is arranged on the middle end of the discharging pipe (416).

4. The cooling device for petrochemical production according to claim 1, characterized in that: The cooling assembly (5) comprises: A water cooling component (51) is sleeved on the outer side of the stirring assembly (4); A dismounting component (52) is arranged on one side of the water cooling component (51).

5. The cooling device for petrochemical production according to claim 4, characterized in that: The water cooling component (51) comprises: A protective frame (511) is fixedly sleeved on the outer side of the cooling cylinder (412); A water tank (512) is fixedly installed on the top of the bottom plate (1).

6. The cooling device for petrochemical production according to claim 5, characterized in that: A circulating pipe (515) is arranged in the protective frame (511), the two ends of the circulating pipe (515) respectively penetrate the bottom of the inner wall of the protective frame (511) and extend to the bottom of the outer wall of the protective frame (511), one end of the circulating pipe (515) is in communication with the water tank (512), the other end of the circulating pipe (515) is communicatively provided with a pump (516), the input end of the pump (516) is communicatively provided with a water pumping pipe (517), the other end of the water pumping pipe (517) penetrates the top of the water tank (512) and extends to the inside of the water tank (512), the top of the water tank (512) is communicatively provided with a water inlet pipe (513), the two sides of the water tank (512) are respectively provided with semiconductor condenser sheets (514), an air outlet is equidistantly formed on one side of the outer wall of the protective frame (511), and an air inlet is formed on the other side of the protective frame (511).

7. The cooling device for petrochemical production according to claim 4, characterized in that: The dismounting component (52) comprises: An air inlet frame (521) is communicatively arranged on the other side of the protective frame (511); An installation plate (522) is fixedly installed on the inside of the air inlet frame (521); The engaging frame (529) is symmetrically fixedly installed on both sides of the outer wall of the air inlet frame (521).

8. The cooling device for petrochemical production according to claim 7, characterized in that: The inside of the mounting plate (522) is symmetrically provided with a fan (523), the inside of the air inlet frame (521) is movably provided with a dust screen cloth (524), the outside of the dust screen cloth (524) is symmetrically fixedly provided with a connecting block (525), the other side of the connecting block (525) is fixedly provided with a dustproof plate (526), the outside of the dustproof plate (526) is symmetrically fixedly provided with a connecting plate (527), the inside of the connecting plate (527) is fixedly provided with an engaging block one (528), the engaging block one (528) is matched with the engaging frame (529), the outside of the engaging block one (528) is provided with a movable slot, the outside of the engaging frame (529) is provided with an engaging opening, the movable slot and the engaging opening are in communication, the other side of the engaging block one (528) is provided with a sliding opening, the inside of the engaging block one (528) is fixedly provided with a guide column (5211), the outer wall of the guide column (5211) is slidably sleeved with an engaging block (5212), the engaging block (5212) is engagedly connected with the engaging frame (529) through the engaging opening, the outer wall of the guide column (5211) is sleeved with a spring (5213), one end of the spring (5213) is fixedly connected with the engaging block one (528), the other end of the spring (5213) is fixedly connected with the engaging block (5212), the outside of the engaging block (5212) is fixedly provided with a push piece (5214), the push piece (5214) movably penetrates through the sliding opening.

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