A steam pressure cooker

Abstract

The present application belongs to the technical field of steam pressure cooker, especially to a steam pressure cooker. The following scheme is proposed, which comprises a pot body. The inside of the pot body near the bottom end is provided with a diffusion assembly, and the diffusion assembly comprises a partition plate and a plurality of multi-section telescopic sleeves. The partition plate is fixedly connected to the inside of the pot body near the bottom end. The partition plate is located at the top of each multi-section telescopic sleeve and has a liquid overflow hole equidistantly opened. The side of each multi-section telescopic sleeve has a steam diffusion hole equidistantly opened. The present application is provided with a lifting assembly. When the user moves the heated pot body, the user can press the embedded rubber filling pad to squeeze out the water in the hollow handle from the overflow hole if the temperature outside the hollow handle is high, so as to realize the cooling of the outer wall of the hollow handle by water cooling, and ensure that the user will not be scalded when moving the pot body due to the high temperature of the hollow handle, further improving the safety performance of the steam pressure cooker.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steam pressure cooker, in particular to a steam pressure cooker. BACKGROUND

[0002] The high pressure pot is also called pressure cooker, pressure pot, which is a kind of kitchen pot. The pressure cooker can make water reach a higher temperature without boiling by using the physical phenomenon that the boiling point of liquid will rise at a higher pressure, so as to speed up the efficiency of stewing food. The food to be cooked can be heated to more than 100 DEG C by using the pressure cooker, and in high altitude areas, the problem that the water boiling point is reduced and the food is not easy to cook can be avoided by using the pressure cooker.

[0003] The existing steam pressure cooker heats the water in the pressure cooker by using an electric heating device during use, so as to realize the heating effect. However, the existing steam pressure cooker follows a heating sequence from bottom to top and from outside to inside during use, which will cause the heating effect of the materials located at the bottom and close to the side of the steam pressure cooker to be obviously higher than that of the materials located in the middle. At the same time, the heating method causes the time consumed for realizing the overall heating of the materials in the steam pressure cooker to be longer, which reduces the use value of the steam pressure cooker. SUMMARY

[0004] The steam pressure cooker provided by the present application comprises a pot body, the inside of the pot body close to the bottom end is provided with a diffusion assembly, and the diffusion assembly comprises a partition plate and a plurality of multi-section telescopic sleeves. The partition plate is fixedly connected to the inside of the pot body close to the bottom end. A mounting hole is equidistantly arranged on the top of the partition plate. The multi-section telescopic sleeves are fixedly connected to the inside of the mounting hole. A liquid passing hole is equidistantly arranged on the top of the partition plate outside each multi-section telescopic sleeve. A steam diffusion hole is equidistantly arranged on the side of each multi-section telescopic sleeve. A hollow annular pipe is fixedly connected to the inner wall of the bottom of the pot body. Gas holes are equidistantly arranged on the outside of the hollow annular pipe facing the center position of the pot body. A through hole is arranged on the outside of the hollow annular pipe close to the pot body. An installation frame is fixedly connected to the inside of the through hole. The inside of the installation frame is in communication with the inside of the pot body. A circulating air pump is fixedly connected to the inside of the installation frame. An air inlet pipe is fixedly connected to the air inlet end of the circulating air pump. The open end of the air inlet pipe is located below the partition plate. The air outlet end of the circulating air pump is connected to the inside of the hollow annular pipe through a pipeline.

[0005] As a further scheme of the present application, mounting grooves are arranged on the side and the bottom of the pot body. Electric heating pipes are equidistantly fixedly connected to the inside of the mounting grooves. Two lifting assemblies are arranged on the outside of the pot body. The lifting assembly comprises a hollow handle and an embedded rubber filling pad.

[0006] As a further scheme of the present application, the hollow handle is fixedly connected with connecting rods at both ends, and the other ends of the two connecting rods are fixedly connected with the outer side of the pot body, the hollow handle is provided with a pressing groove near the middle position, and an embedded rubber filling pad is filled in the pressing groove.

[0007] As a further scheme of the present application, the hollow handle is fixedly connected with connecting rods at both ends, and the other ends of the two connecting rods are fixedly connected with the outer side of the pot body, the hollow handle is provided with a pressing groove near the middle position, and an embedded rubber filling pad is filled in the pressing groove.

[0008] As a further scheme of the present application, the top of the pot body is provided with a top end buffering assembly, and the top end buffering assembly comprises a connecting ring and a pot cover, and the connecting ring is connected with the top of the pot body through a hinge.

[0009] As a further scheme of the present application, the top of the connecting ring is fixedly connected with an outer telescopic sleeve and an inner partition telescopic sleeve, and the pot cover is fixedly connected with the top of the outer telescopic sleeve and the inner partition telescopic sleeve, and the opposite sides of the connecting ring and the pot cover are fixedly connected with spring rods at equal distances, and the spring rods are located between the outer telescopic sleeve and the inner partition telescopic sleeve.

[0010] As a further scheme of the present application, the top of the pot cover is fixedly connected with a protective arc plate, and the top of the pot cover below the protective arc plate is fixedly connected with placing rods at equal distances, and a plurality of counterweight rings are sleeved on the outer side of each placing rod.

[0011] As a further scheme of the present application, the top center position of the pot cover is provided with a pressure relief cooling assembly, and the pressure relief cooling assembly comprises a pressure relief pipe and a peripheral frame, the top of the pot cover is provided with a pressure relief hole, and the pressure relief pipe is fixedly connected with the inside of the pressure relief hole.

[0012] As a further scheme of the present application, the inner wall of the pressure relief pipe near the bottom end is fixedly connected with a lower limit ring, and the inside of the pressure relief pipe above the lower limit ring is filled with a suspension ball, the both ends of the pressure relief pipe near the maximum radius of the suspension ball are provided with flow guide holes, the inside of the two flow guide holes is fixedly connected with flow guide frames, and the flow guide frames are located in the inside of the peripheral frame.

[0013] As a further scheme of the present application, the peripheral frame is fixedly connected with the outer side of the pressure relief pipe, and the top of the peripheral frame is provided with insertion holes at equal distances, and the inside of each insertion hole is inserted with a cooling pipe, the bottom end of the cooling pipe is in contact with the inner wall of the bottom of the peripheral frame, the cooling pipe is filled with cooling water, the top of the cooling pipe is fixedly connected with a pull rod, the bottom of the peripheral frame is provided with a drainage hole, the inside of the drainage hole is fixedly connected with a drainage pipe, and the outer side of the drainage pipe is connected with a pipe valve through a flange.

[0014] The beneficial effects of the present application are as follows:

[0015] 1. By setting up the diffusion assembly, when using the steam pressure cooker, the water body falls into the layer below the layer from the liquid hole on the layer, the electric heating tube heats the water body, and makes it evaporate. In the process of electrifying the electric heating tube, start the circulating air pump, and the circulating air pump introduces the steam under the layer into the annular hollow tube, and blows out through the air hole. This part of the steam accelerates the steam flow under the layer, and makes it flow to the position of each multi-section telescopic sleeve. A small part of the steam flows into the layer above through the liquid hole, and most of the steam is introduced into each multi-section telescopic sleeve. With the impact of the steam, the multi-section telescopic sleeve is stretched, and the steam is discharged from each steam diffusion hole, so that the steam filling of the internal space of the pot above the layer is quickly realized, thereby improving the steam heating effect, improving the material heating effect and the uniformity of heating, and improving the overall heating speed of the material.

[0016] 2. By setting up the top buffer assembly, when using the steam pressure cooker, the steam quantity in the pot body is large, then the pressure in the pot body is large, the steam impacts the pot cover, then the spring rod is passively stretched, and the outer telescopic sleeve and the inner partition telescopic sleeve are stretched, thereby increasing the internal space of the pot body, reducing the air pressure per unit space, preventing safety accidents caused by excessive air pressure in the pot body, and placing a counterweight ring above the pot cover to increase the weight of the pot cover, avoid the situation that the pot cover is thrown off due to excessive pressure, and further improve the safety of the steam pressure cooker.

[0017] 3. By setting up the pressure relief cooling assembly, when the pressure in the pot body is greater than a certain value, the steam pushes the floating ball to rise, part of the steam enters the peripheral frame along the flow guide frame, and the pressure in the pot body is ensured to be within a safe and controllable range. Each cooling pipe in the peripheral frame is filled with cooling water, which exchanges heat with the steam, so that the steam condenses, avoiding safety accidents caused by direct discharge of steam. When there is more water in the peripheral frame, open the pipe valve to discharge it through the drain pipe.

[0018] 4. By setting up the lifting assembly, when the user moves the heated pot, the user can press the embedded rubber filling pad to squeeze out the water in the hollow handle from the overflow hole, so as to realize the temperature reduction of the outer wall of the hollow handle through water cooling, and ensure that the user will not be scalded when moving the pot, and further improve the safety performance of the steam pressure cooker. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic diagram of the steam pressure cooker proposed in the application;

[0020] Figure 2 It is a diffusion assembly schematic diagram of the steam pressure cooker proposed in the application;

[0021] Figure 3 A sectional view of the partition plate structure of a steam pressure cooker according to the present application;

[0022] Figure 4 A schematic view of the top end buffer assembly of a steam pressure cooker according to the present application;

[0023] Figure 5 A schematic view of the pressure relief and cooling assembly of a steam pressure cooker according to the present application;

[0024] Figure 6 A sectional view of the structure of a steam pressure cooker according to the present application; Figure 5

[0025] Figure 7 A schematic view of the lifting assembly of a steam pressure cooker according to the present application.

[0026] In the figure: 1, cooker body; 2, lifting assembly; 201, hollow handle; 202, embedded rubber filling pad; 203, overflow hole; 204, liquid filling pipe; 205, pipe cap; 206, connecting rod; 3, diffusion assembly; 301, partition plate; 302, mounting bracket; 303, multi-section telescopic sleeve; 304, steam diffusion hole; 305, liquid passing hole; 306, annular hollow pipe; 307, circulating air pump; 308, air inlet pipe; 309, air hole; 4, electric heating pipe; 5, mounting groove; 6, top end buffer assembly; 601, cooker cover; 602, counterweight ring; 603, resting rod; 604, protective arc plate; 605, connecting ring; 606, outer telescopic sleeve; 607, inner partition telescopic sleeve; 608, spring rod; 7, pressure relief and cooling assembly; 701, pressure relief pipe; 702, pressure relief hole; 703, floating ball; 704, pull rod; 705, cooling pipe; 706, peripheral frame; 707, lower limit ring; 708, liquid discharge pipe; 709, pipe valve; 710, flow guide frame. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0028] Reference Figures 1-7 ​The utility model provides a steam pressure cooker, including the kettle body 1, the inside of kettle body 1 is close to bottom end and is equipped with diffusion subassembly 3, and diffusion subassembly 3 includes the partition plate 301 and multiple multi -section telescopic sleeve 303, the inside of partition plate 301 is fixedly connected to kettle body 1 close to bottom end, and the top of partition plate 301 is equidistantly opened and is equipped with the mounting hole, and multiple multi -section telescopic sleeve 303 is fixedly connected to the inside of mounting hole, and the top of partition plate 301 is equidistantly opened and is equipped with the liquid passing hole 305 on the outside of each multi -section telescopic sleeve 303, and the side of each multi -section telescopic sleeve 303 is equidistantly opened and is equipped with the steam diffusion hole 304, and the bottom inner wall of kettle body 1 is fixedly connected with annular hollow pipe 306, and the outside of annular hollow pipe 306 is equidistantly opened and is equipped with the air hole 309 facing the center position of kettle body 1, and the outside of annular hollow pipe 306 is opened and is equipped with the through -hole close to kettle body 1, and the inside of through -hole is fixedly connected with mounting bracket 302, and mounting bracket 302 is in the state of communication with the inside of kettle body 1, and the inside of mounting bracket 302 is fixedly connected with circulating air pump 307, and the air inlet end of circulating air pump 307 is fixedly connected with air inlet pipe 308, and the opening end of air inlet pipe 308 is located below partition plate 301, and the gas delivery end of circulating air pump 307 is connected with the inside of annular hollow pipe 306 through pipeline;

[0029] When using the steam pressure cooker, the water body falls into the below of the partition plate 301 from the liquid passing hole 305 on the partition plate 301, and the electric heating tube 4 heats the water body to evaporate, and the electric heating tube 4 is electrified, and the circulating air pump 307 is started, and the steam in the below of the partition plate 301 is introduced into the annular hollow pipe 306 by the circulating air pump 307, and the steam is blown out through the air hole 309, and the steam accelerates the steam flow below the partition plate 301 to flow to the position of each multi -section telescopic sleeve 303, and a small part of steam flows into the above of the partition plate 301 along the liquid passing hole 305, and most of the steam is introduced into each multi -section telescopic sleeve 303, and the multi -section telescopic sleeve 303 is stretched by the impact of the steam, and the steam is discharged from each steam diffusion hole 304, and the steam filling of the inside space of the kettle body 1 above the partition plate 301 is realized quickly, so that the steam heating effect is improved, and the material heating effect and the uniformity of heating are improved, and the overall heating speed of the material is improved.

[0030] Referring to Figure 1 And Figure 7 The side and the bottom of the kettle body 1 are opened and are equipped with the mounting groove 5, and the inside of the mounting groove 5 is fixedly connected with the electric heating tube 4 at equal distance, and the outside of the kettle body 1 is equipped with two lifting subassemblies 2, and the lifting subassembly 2 includes the hollow handle 201 and the embedded rubber filling pad 202.

[0031] In the present application, the two ends of the hollow handle 201 are fixedly connected with connecting rods 206, and the other ends of the two connecting rods 206 are fixedly connected to the outside of the pot body 1. The hollow handle 201 is provided with a pressing groove near the middle position. The embedded rubber filling pad 202 is filled in the inside of the pressing groove. The outside of the hollow handle 201 at the two ends of the embedded rubber filling pad 202 is provided with overflow holes 203 at equal distances. One side of the hollow handle 201 is provided with a liquid inlet hole. The inside of the liquid inlet hole is fixedly connected with a liquid adding pipe 204. The top of the liquid adding pipe 204 is screwed with a pipe cap 205.

[0032] When the user moves the pot body 1 after heating, the user holds the hollow handle 201. If the temperature outside the hollow handle 201 is high, the user can press the embedded rubber filling pad 202, so as to squeeze out the water in the hollow handle 201 from the overflow holes 203, and realize the cooling of the outer wall of the hollow handle 201 through water cooling, so as to ensure that the user will not be scalded when moving the pot body 1 due to the high temperature of the hollow handle 201, and further improve the safety performance of the steam pressure cooker.

[0033] Referring to Figure 1 and Figure 4 , the top of the pot body 1 is provided with a top buffer assembly 6. The top buffer assembly 6 comprises a connecting ring 605 and a pot cover 601. The connecting ring 605 is connected to the top of the pot body 1 through a hinge.

[0034] In the present application, the top of the connecting ring 605 is fixedly connected with an outer telescopic sleeve 606 and an inner partition telescopic sleeve 607. The pot cover 601 is fixedly connected to the top of the outer telescopic sleeve 606 and the inner partition telescopic sleeve 607. The opposite side of the connecting ring 605 and the pot cover 601 is fixedly connected with spring rods 608 at equal distances. The spring rods 608 are located between the outer telescopic sleeve 606 and the inner partition telescopic sleeve 607. The top of the pot cover 601 is fixedly connected with a protective arc plate 604. The top of the pot cover 601 below the protective arc plate 604 is fixedly connected with placing rods 603 at equal distances. The outside of each placing rod 603 is sleeved with a plurality of counterweight rings 602.

[0035] When the steam pressure cooker is used, the steam volume in the pot body 1 is large, so the pressure in the pot body 1 is large. The steam impacts the pot cover 601, so the spring rods 608 are passively stretched, and the outer telescopic sleeve 606 and the inner partition telescopic sleeve 607 are stretched, so as to increase the space in the pot body 1 and reduce the air pressure in the unit space, so as to prevent safety accidents caused by excessive air pressure in the pot body 1. The counterweight rings 602 are placed above the pot cover 601, so as to increase the weight of the pot cover 601, avoid the situation that the pot cover 601 flies due to excessive pressure, and further improve the use safety of the steam pressure cooker.

[0036] Referring to Figure 1 , Figure 5 andFigure 6 The top end center position of the pot cover 601 is provided with a pressure relief cooling assembly 7, and the pressure relief cooling assembly 7 comprises a pressure relief pipe 701 and a peripheral frame 706.

[0037] In the application, the inner wall close to the bottom end of the pressure relief pipe 701 is fixedly connected with a lower limiting ring 707, and the inside of the pressure relief pipe 701 above the lower limiting ring 707 is filled with a suspension ball 703.

[0038] In the application, the peripheral frame 706 is fixedly connected to the outer side of the pressure relief pipe 701, and the top of the peripheral frame 706 is equidistantly provided with a plurality of insertion holes, each of which is inserted with a cooling pipe 705, the bottom end of the cooling pipe 705 is in contact with the inner wall of the bottom of the peripheral frame 706, the cooling pipe 705 is filled with cooling water, the top of the cooling pipe 705 is fixedly connected with a pull rod 704, the bottom of the peripheral frame 706 is provided with a drainage hole, the inside of the drainage hole is fixedly connected with a drainage pipe 708, and the outer side of the drainage pipe 708 is connected with a pipe valve 709 through a flange.

[0039] When the pressure inside the pot body 1 is greater than a certain value, the steam pushes the suspension ball 703 to rise, part of the steam enters the peripheral frame 706 along the flow guide frame 710, so that the pressure inside the pot body 1 is kept within a safe and controllable range, and each cooling pipe 705 in the peripheral frame 706 is filled with cooling water, which exchanges heat with the steam, so that the steam is condensed, avoiding safety accidents caused by direct discharge of steam.

[0040] In use, when the steam pressure cooker is used, the water body falls into the space below the partition plate 301 from the liquid passing hole 305 on the partition plate 301, the electric heating pipe 4 heats the water body to evaporate, in the process of electrifying the electric heating pipe 4, the circulating air pump 307 is started, the circulating air pump 307 guides the steam below the partition plate 301 into the annular hollow pipe 306, and the steam is blown out through the air hole 309, the steam accelerates the steam flow below the partition plate 301, and makes the steam flow to the positions of the multiple telescopic sleeves 303, a small part of the steam flows into the space above the partition plate 301 along the liquid passing hole 305, and most of the steam is guided into the multiple telescopic sleeves 303, under the impact of the steam, the multiple telescopic sleeves 303 are stretched, then the steam is discharged from the steam diffusion holes 304, the steam filling of the internal space of the cooker body 1 above the partition plate 301 is quickly realized, in the working process of the steam pressure cooker, the steam impacts the cover 601, then the spring rod 608 is passively stretched, the outer telescopic sleeve 606 and the inner partition telescopic sleeve 607 are stretched, so that the internal space of the cooker body 1 is increased, the air pressure of the unit space is reduced, and safety accidents caused by excessive air pressure in the internal space of the cooker body 1 are prevented, when the pressure in the internal space of the cooker body 1 is greater than a certain value, the steam pushes the floating ball 703 to rise, part of the steam enters the peripheral frame 706 along the flow guide frame 710, and the pressure in the internal space of the cooker body 1 is ensured to be in a safe and controllable range.

[0041] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A steam pressure cooker comprising a cooker body (1), characterized in that, The inside of the pot body (1) near the bottom end is provided with a diffusion assembly (3), and the diffusion assembly (3) comprises a partition plate (301) and a plurality of multi-section telescopic sleeves (303), the partition plate (301) is fixedly connected to the inside of the pot body (1) near the bottom end, a plurality of mounting holes are equidistantly formed in the top of the partition plate (301), and the multi-section telescopic sleeves (303) are fixedly connected to the inside of the mounting holes, a liquid passing hole (305) is equidistantly formed in the top of the partition plate (301) outside each multi-section telescopic sleeve (303), steam diffusion holes (304) are equidistantly formed in the side of each multi-section telescopic sleeve (303), the bottom inner wall of the pot body (1) is fixedly connected with an annular hollow pipe (306), and a plurality of air holes (309) are equidistantly formed in the outer side of the annular hollow pipe (306) facing the center position of the pot body (1), a through hole is formed in the outer side of the pot body (1) near the annular hollow pipe (306), and a mounting frame (302) is fixedly connected to the inside of the through hole, the mounting frame (302) is in communication with the inside of the pot body (1), a circulating air pump (307) is fixedly connected to the inside of the mounting frame (302), and an air inlet pipe (308) is fixedly connected to the air inlet end of the circulating air pump (307), the opening end of the air inlet pipe (308) is located below the partition plate (301), and the air outlet end of the circulating air pump (307) is connected to the inside of the annular hollow pipe (306) through a pipeline.

2. A pressure cooker according to claim 1, wherein The side and the bottom of the pot body (1) are provided with mounting grooves (5), and the inside of the mounting grooves (5) is fixedly connected with electric heating pipes (4) at equal distances, and the outer side of the pot body (1) is provided with two lifting assemblies (2), and the lifting assembly (2) comprises a hollow handle (201) and an embedded rubber filling pad (202).

3. A pressure cooker according to claim 2, wherein The two ends of the hollow handle (201) are fixedly connected with connecting rods (206), and the other ends of the two connecting rods (206) are fixedly connected to the outer side of the pot body (1), and the hollow handle (201) is provided with a pressing groove near the middle position, and the embedded rubber filling pad (202) is filled in the pressing groove.

4. A pressure cooker according to claim 3, wherein The outer side of the hollow handle (201) at the two ends of the embedded rubber filling pad (202) is equidistantly provided with overflow holes (203), and one side of the hollow handle (201) is provided with a liquid inlet hole, and the liquid inlet hole is fixedly connected with a liquid adding pipe (204), and the top of the liquid adding pipe (204) is rotatably connected with a pipe cap (205).

5. A pressure cooker according to claim 1, wherein The top of the pot body (1) is provided with a top end buffering assembly (6), and the top end buffering assembly (6) comprises a connecting ring (605) and a pot cover (601), and the connecting ring (605) is connected to the top of the pot body (1) through a hinge.

6. A pressure cooker according to claim 5, wherein The top of the connecting ring (605) is fixedly connected with an outer telescopic sleeve (606) and an inner partition telescopic sleeve (607), and the pot cover (601) is fixedly connected to the top of the outer telescopic sleeve (606) and the inner partition telescopic sleeve (607), and the opposite side of the connecting ring (605) and the pot cover (601) is fixedly connected with a spring rod (608) at equal distances, and the spring rod (608) is located between the outer telescopic sleeve (606) and the inner partition telescopic sleeve (607).

7. A pressure cooker according to claim 6, wherein The top of the pot cover (601) is fixedly connected with a protective arc plate (604), and the top of the pot cover (601) below the protective arc plate (604) is fixedly connected with a placing rod (603) at equal intervals, and the outer side of each placing rod (603) is sleeved with a plurality of counterweight rings (602).

8. A pressure cooker according to claim 7, wherein The top center of the pot cover (601) is provided with a pressure relief cooling assembly (7), and the pressure relief cooling assembly (7) comprises a pressure relief pipe (701) and a peripheral frame (706), the top of the pot cover (601) is provided with a pressure relief hole (702), and the pressure relief pipe (701) is fixedly connected to the inside of the pressure relief hole (702).

9. A pressure cooker according to claim 8, wherein The inner wall of the bottom end of the pressure relief pipe (701) is fixedly connected with a lower limit ring (707), the inside of the pressure relief pipe (701) above the lower limit ring (707) is filled with a suspension ball (703), the two ends of the pressure relief pipe (701) near the maximum radius of the suspension ball (703) are provided with flow guide holes, the inside of the two flow guide holes is fixedly connected with a flow guide frame (710), and the flow guide frame (710) is located in the inside of the peripheral frame (706).

10. A pressure cooker according to claim 9, wherein The peripheral frame (706) is fixedly connected to the outer side of the pressure relief pipe (701), and the top of the peripheral frame (706) is provided with plug holes at equal intervals, the inside of each plug hole is inserted with a cooling pipe (705), the bottom end of the cooling pipe (705) is in contact with the inner wall of the bottom of the peripheral frame (706), the cooling pipe (705) is filled with cooling water, the top of the cooling pipe (705) is fixedly connected with a pull rod (704), the bottom of the peripheral frame (706) is provided with a drain hole, the inside of the drain hole is fixedly connected with a drain pipe (708), and the outer side of the drain pipe (708) is connected with a pipe valve (709) through a flange.

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