阅读说明：本技术 可自动调节压力的腐竹加工装置 (Bean curd stick processing device capable of automatically adjusting pressure ) 是由 刘长安 刘根 于 2020-11-27 设计创作，主要内容包括：本发明公开了一种可自动调节压力的腐竹加工装置,包括腐皮成型装置,腐皮成型装置内容置有豆浆,腐皮成型装置底部设置有蒸汽加热装置,蒸汽加热装置可对腐皮成型装置内的豆浆加热保温,以使豆浆表面形成腐皮,蒸汽加热装置与调压装置相连,调压装置可调整蒸汽加热装置内部的压力,以防止蒸汽加热装置压力过高而发生爆炸；腐皮成型装置上方设置有腐竹搓圆装置,腐皮经腐竹搓圆装置将片状腐皮揉搓成柱状腐竹,腐竹搓圆装置与传送装置相连,传送装置将柱状腐竹烘干后,输至包装工序。本发明的可自动调节压力的腐竹加工装置,设计巧妙,在保证蒸汽加热装置温度的同时,又避免了蒸汽加热装置因超压而爆炸,在提高安全系数的同时又提高了生产效率。(The invention discloses a dried bean processing device capable of automatically adjusting pressure, which comprises a dried bean curd sheet forming device, wherein soybean milk is contained in the dried bean curd sheet forming device, a steam heating device is arranged at the bottom of the dried bean curd sheet forming device, the steam heating device can heat and preserve the temperature of the soybean milk in the dried bean curd sheet forming device so as to form dried bean curd sheets on the surface of the soybean milk, the steam heating device is connected with a pressure adjusting device, and the pressure adjusting device can adjust the pressure in the steam heating device so as to prevent the steam heating device from exploding due to overhigh pressure; a bean curd sheet rounding device is arranged above the bean curd sheet forming device, the bean curd sheets are rounded into cylindrical bean curd sticks by the bean curd sheet rounding device, the bean curd stick rounding device is connected with a conveying device, and the cylindrical bean curd sticks are dried by the conveying device and then conveyed to a packaging process. The bean curd stick processing device capable of automatically adjusting the pressure is ingenious in design, the temperature of the steam heating device is guaranteed, meanwhile, the steam heating device is prevented from exploding due to overpressure, the safety coefficient is improved, and meanwhile, the production efficiency is improved.)

1. A bean curd sheet processing device capable of automatically adjusting pressure is characterized by comprising a bean curd sheet forming device, soybean milk is contained in the bean curd sheet forming device, a steam heating device is arranged at the bottom of the bean curd sheet forming device, the steam heating device can heat and preserve the temperature of the soybean milk in the bean curd sheet forming device so as to form bean curd sheets on the surface of the soybean milk, the steam heating device is connected with a pressure adjusting device, and the pressure adjusting device can adjust the pressure in the steam heating device so as to prevent the steam heating device from exploding due to overhigh pressure; a bean curd sheet rounding device is arranged above the bean curd sheet forming device, the bean curd sheets are rounded into cylindrical bean curd sticks by the bean curd sheet rounding device, the bean curd stick rounding device is connected with a conveying device, and the cylindrical bean curd sticks are dried by the conveying device and then conveyed to a packaging process.

2. The bean curd sheet processing device capable of automatically adjusting pressure according to claim 1, wherein the bean curd sheet forming device comprises a bean curd sheet forming frame body, and a sheet forming groove is formed in the bean curd sheet forming frame body; steam heating device holds the chamber including steam, and steam holds the chamber setting in the below of skinning groove.

3. The bean curd stick processing device capable of automatically adjusting pressure as claimed in claim 2, wherein the steam accommodating chamber comprises a steam inlet port, the steam inlet port is disposed on a side wall of the steam accommodating chamber, high-temperature steam enters the steam accommodating chamber through the steam inlet port, and the high-temperature steam heats the soybean milk in the skinning groove through a bottom wall of the skinning groove.

4. The automatic pressure-adjustable dried bean processing device according to claim 2, wherein the pressure-adjusting device comprises a pressure-adjusting tank, a condensed water containing space is arranged in the pressure-adjusting tank for containing condensed water, a pressure-adjusting pipe is arranged above the pressure-adjusting tank, and steam and condensed water in the steam containing cavity can enter the pressure-adjusting tank through the pressure-adjusting pipe; the pressure regulating tank below is provided with the pressure discharge pipe, and the export of pressure discharge pipe links to each other with the external world, and steam and the comdenstion water in the pressure regulating tank can be discharged through the pressure discharge pipe.

5. A dried bean processing device capable of automatically adjusting pressure as claimed in claim 4, wherein the inlet of the pressure adjusting pipe is connected with the steam accommodating cavity, and the outlet of the pressure adjusting pipe extends into the pressure adjusting tank and is close to the bottom of the pressure adjusting tank and is arranged below the liquid level of condensed water, so that the steam accommodating cavity is kept sealed.

6. A dried bean processing device capable of automatically adjusting pressure as claimed in claim 4, wherein the inlet of the pressure-discharging pipe is arranged near the top of the pressure-adjusting tank and above the level of the condensed water, and when the level of the condensed water exceeds the inlet of the pressure-discharging pipe, the condensed water can be discharged through the pressure-discharging pipe.

7. The bean curd stick processing device capable of automatically adjusting pressure as claimed in claim 2, wherein the bean curd stick rounding device is arranged in the middle of the beancurd sheet groove, a cutting component is arranged on one side of the bean curd stick rounding device away from the conveying frame body, and the cutting component can cut the beancurd sheets in the beancurd sheet groove into a plurality of pieces, so that a plurality of bean curd sticks are formed after being kneaded by the bean curd stick rounding device.

8. The apparatus for processing dried bean curd sticks with automatically adjustable pressure as claimed in claim 7, wherein the slitting assembly comprises cutter holders disposed at both sides of the crust groove, the cutter holders being provided with cutter mounting shafts, one end of the cutter being fitted over the cutter mounting shafts; the other end of the cutter is provided with a circular blade which can rotate around a cutter handle of the cutter; a cutting shaft is arranged between the cutter fixing seat and the rounding part, and the circular cutter blade can be abutted against the cutting shaft.

9. The bean curd stick processing device capable of automatically adjusting pressure according to claim 8, wherein the skinning grooves comprise a first skinning groove, a second skinning groove and a pulp discharging groove, and the first skinning groove, the pulp discharging groove and the second skinning groove are connected in sequence; the pulp discharge groove is arranged on one side of the slitting shaft away from the bean curd stick rounding device; the soybean milk feeding port is respectively arranged at one end of the first crusting tank and one end of the second crusting tank far away from the soybean milk discharging tank, the lower end of the soybean milk discharging tank is provided with a soybean milk discharging port, and the soybean milk discharging port is connected with a soybean milk recovery device.

10. The apparatus for processing dried beancurd sticks with automatically adjustable pressure as claimed in claim 1, wherein the plurality of pressure adjusting devices are uniformly distributed below the steam heating device.

Technical Field

The invention relates to food processing equipment, in particular to a dried bean processing device capable of automatically adjusting pressure.

Background

The dried beancurd stick is also called beancurd sheet, is a popular traditional food, is a common food raw material, has strong bean flavor, and has unique taste which is not possessed by other bean products. The dried beancurd sticks are yellow and white in color, glossy and bright, and rich in protein and various nutritional ingredients.

The existing bean curd stick processing technology is generally that soybean milk is heated and boiled, heat preservation is carried out for a period of time, a layer of film is formed on the surface, the film is picked out and droops to form a branch strip shape, and then the bean curd stick is obtained by drying. It is similar to the branch of a bamboo, and is called a dried bean. The dried bean curd stick is a product with a certain structure and composed of a soybean protein film and fat. High nutritive value, easy preservation and convenient eating, and is deeply favored by consumers at home and abroad.

In the traditional processing process, steam is usually adopted to heat and preserve the temperature of the soybean milk, but in order to ensure the temperature of the soybean milk, the steam needs to be continuously conveyed into the dried bean forming device, the pressure in the dried bean forming device can be gradually increased, and the dried bean forming device is easy to explode under overpressure.

Therefore, it is necessary to design a bean curd stick processing device capable of automatically adjusting pressure.

Disclosure of Invention

The invention provides a dried bean processing device capable of automatically adjusting pressure, which has the advantages of high automation degree and high production efficiency, ensures the temperature of a steam heating device, and avoids the explosion of the steam heating device due to overpressure. The specific technical scheme is as follows:

a bean curd sheet processing device capable of automatically adjusting pressure comprises a bean curd sheet forming device, soybean milk is contained in the bean curd sheet forming device, a steam heating device is arranged at the bottom of the bean curd sheet forming device, the steam heating device can heat and preserve the temperature of the soybean milk in the bean curd sheet forming device so as to form bean curd sheets on the surface of the soybean milk, the steam heating device is connected with a pressure adjusting device, and the pressure adjusting device can adjust the pressure in the steam heating device so as to prevent the steam heating device from being exploded due to overhigh pressure; a bean curd sheet rounding device is arranged above the bean curd sheet forming device, the bean curd sheets are rounded into cylindrical bean curd sticks by the bean curd sheet rounding device, the bean curd stick rounding device is connected with a conveying device, and the cylindrical bean curd sticks are dried by the conveying device and then conveyed to a packaging process.

Further, the beancurd sheet forming device comprises a beancurd sheet forming frame body, and a beancurd sheet forming groove is formed in the beancurd sheet forming frame body; steam heating device holds the chamber including steam, and steam holds the chamber setting in the below of skinning groove.

Further, steam holds the chamber and includes the steam air inlet, and the steam air inlet sets up on the lateral wall that steam held the chamber, and high temperature steam gets into steam through the steam air inlet and holds the intracavity, and high temperature steam heats the soybean milk in the crust groove through the diapire in crust groove.

Further, the pressure regulating device comprises a pressure regulating tank, a condensate water containing space is arranged in the pressure regulating tank and used for containing condensate water, a pressure regulating pipe is arranged above the pressure regulating tank, and steam and condensate water in the steam containing cavity can enter the pressure regulating tank through the pressure regulating pipe; the pressure regulating tank below is provided with the pressure discharge pipe, and the export of pressure discharge pipe links to each other with the external world, and steam and the comdenstion water in the pressure regulating tank can be discharged through the pressure discharge pipe.

Furthermore, the inlet of the pressure regulating pipe is connected with the steam containing cavity, and the outlet of the pressure regulating pipe extends into the bottom of the pressure regulating tank close to the pressure regulating tank and is arranged below the liquid level of condensed water, so that the steam containing cavity keeps sealed.

Further, the top that the entry of pressure regulating jar is close to the pressure regulating pipe sets up and sets up in the top of comdenstion water liquid level, and when the comdenstion water liquid level surpassed the entry of pressure regulating pipe, the comdenstion water can be discharged through the pressure regulating pipe.

Further, the bean curd stick rounding device is arranged in the middle of the crust groove, one side, far away from the conveying frame body, of the bean curd stick rounding device is provided with a cutting assembly, the cutting assembly can cut bean curd sheets in the crust groove into a plurality of pieces, and a plurality of bean curd sticks are formed after being kneaded by the bean curd stick rounding device.

Further, the slitting component comprises a cutter fixing seat, the cutter fixing seat is arranged on two sides of the crust groove, a cutter mounting shaft is arranged on the cutter fixing seat, and a sleeve of the cutter is arranged on the cutter mounting shaft. The other end of the cutter is provided with a circular blade which can rotate around the handle of the cutter. A cutting shaft is arranged between the cutter fixing seat and the rounding part, and the circular cutter blade can be abutted against the cutting shaft.

Further, the skinning grooves comprise a first skinning groove, a second skinning groove and a pulp discharging groove, and the first skinning groove, the pulp discharging groove and the second skinning groove are sequentially connected; the pulp discharge groove is arranged on one side of the splitting shaft away from the bean curd stick rounding device. The soybean milk feeding port is respectively arranged at one end of the first crusting tank and one end of the second crusting tank far away from the soybean milk discharging tank, the lower end of the soybean milk discharging tank is provided with a soybean milk discharging port, and the soybean milk discharging port is connected with a soybean milk recovery device.

Furthermore, the pressure regulating devices are distributed below the steam heating device.

The bean curd stick processing device capable of automatically adjusting the pressure is ingenious in design, the pressure of the steam heating device is adjusted in real time through the pressure adjusting pipe and the pressure discharging pipe of the pressure adjusting tank, the pressure in the steam heating device is guaranteed through liquid seal, the temperature of the steam heating device is guaranteed, meanwhile, the steam heating device is prevented from exploding due to overpressure, and the safety coefficient is improved while the production efficiency is improved.

Drawings

FIG. 1 is a perspective view of a bean curd stick processing apparatus of the present invention, which can automatically adjust pressure;

FIG. 2 is a perspective view of the automatic pressure-adjustable bean curd stick processing apparatus of the present invention 2;

FIG. 3 is a side sectional view of the beancurd sheet forming device of the automatic pressure-adjustable beancurd sheet processing device of the invention;

FIG. 4 is a perspective view of the bean curd sheet forming device and the conveying device of the bean curd sheet processing device capable of automatically adjusting pressure according to the present invention;

fig. 5 is a perspective view of a bean curd stick rounding device of the bean curd stick processing device capable of automatically adjusting pressure.

Detailed Description

In order to better understand the purpose, function and specific design scheme of the invention, the automatic pressure-adjustable bean curd stick processing device of the invention is further described in detail with reference to the attached drawings.

As shown in fig. 1-5, the bean curd sheet processing device capable of automatically adjusting pressure of the invention comprises a bean curd sheet forming device 1, soybean milk is contained in the bean curd sheet forming device 1, a steam heating device is arranged at the bottom of the bean curd sheet forming device 1, the steam heating device can heat and preserve the temperature of the soybean milk in the bean curd sheet forming device 1 so as to form bean curd sheets on the surface of the soybean milk, the steam heating device is connected with a pressure adjusting device 4, and the pressure adjusting device 4 can adjust the pressure in the steam heating device so as to prevent the steam heating device from exploding due to overhigh pressure. A bean curd sheet rounding device 2 is arranged above the bean curd sheet forming device 1, the bean curd sheets are rounded into cylindrical bean curd sticks by the bean curd sheet rounding device 2, the bean curd stick rounding device 2 is connected with a conveying device 3, and the cylindrical bean curd sticks are dried by the conveying device 3 and then conveyed to a packaging process.

Specifically, as shown in fig. 2 and 3, the beancurd sheet forming device 1 includes a beancurd sheet forming frame 11, a beancurd sheet groove 12 is arranged on the beancurd sheet forming frame 11, and a steam heating device is arranged below the beancurd sheet groove 12. Steam heating device holds chamber 13 including steam, and steam holds chamber 13 and sets up in the below of skinning groove 12, and steam holds chamber 13 including the steam air inlet, and the steam air inlet setting of this embodiment holds on the lateral wall of chamber 13 is held to steam, and high temperature steam gets into steam through the steam air inlet and holds in the chamber 13, and high temperature steam heats the soybean milk in the skinning groove 12 through the diapire of skinning groove 12. It is worth noting that the pressure regulating device 4 is arranged at the bottom of the steam accommodating cavity 13, and the pressure regulating device 4 can regulate the pressure of the steam accommodating cavity 13 to prevent the steam accommodating cavity 13 from being exploded due to overhigh pressure. Preferably, the pressure regulating device 4 is provided in plurality and uniformly distributed below the steam accommodating cavity 13.

As shown in fig. 3, the pressure regulating device 4 includes a pressure regulating tank 41, a condensed water containing space is provided in the pressure regulating tank 41 for containing condensed water, a pressure regulating pipe 42 is provided above the pressure regulating tank 41, and steam and condensed water in the steam containing cavity 13 can enter the pressure regulating tank 41 through the pressure regulating pipe 42. An inlet of the pressure regulating pipe 42 is connected with the steam accommodating cavity 13, and an outlet of the pressure regulating pipe 42 extends into the pressure regulating tank 41, is close to the bottom of the pressure regulating tank 41 and is arranged below the liquid level of condensed water, so that the steam accommodating cavity 13 is kept sealed; the pressure regulating tank 41 below is provided with the pressure discharge pipe 43, and the export of pressure discharge pipe 43 links to each other with the external world, and the top setting that the entry of pressure discharge pipe 43 is close to pressure regulating tank 41 just sets up in the top of comdenstion water liquid level, and when the comdenstion water liquid level surpassed the entry of pressure discharge pipe 43, the comdenstion water can be discharged through pressure discharge pipe 43.

The working principle of the pressure regulating tank 41 is as follows: because the high-temperature steam needs to be continuously input into the steam accommodating cavity 13 to ensure the temperature of the soybean milk, the pressure in the steam accommodating cavity 13 can be continuously increased along with the continuous input of the high-temperature steam, the liquid level in the pressure regulating pipe 42 is gradually reduced along with the increase of the pressure, the liquid level of the condensed water in the pressure regulating tank 41 is gradually increased, and if the liquid level of the condensed water in the pressure regulating tank 41 is higher than the inlet of the pressure discharge pipe 43, the condensed water can be discharged through the pressure discharge pipe 43; when the comdenstion water in the pressure regulating pipe 42 was drained completely, steam was arranged to the condensate water in the pressure regulating tank 41 through the export of pressure regulating pipe 42 in, then steam floats to the space between comdenstion water liquid level and the adjustment tank top wall in, discharges through pressure discharging pipe 43 at last to reduce the pressure in the steam holds chamber 13. When the pressure in the steam accommodating cavity 13 is reduced, the condensed water in the pressure regulating tank 41 enters the pressure discharge pipe 43, so that the steam accommodating cavity 13 is kept sealed.

Preferably, the air blower 14 is arranged below the beancurd sheet forming frame body 11, the air blower 14 is connected with the exhaust pipe 15, the exhaust pipe 15 is provided with an air delivery pipe, the air delivery pipe is connected with the air injection pipe 16, the air injection pipe 16 is provided with an air injection hole, and the air injection hole is arranged above the skinning groove 12 and can inject air to the surface of the soybean milk in the skinning groove 12 so as to accelerate the skinning of the surface of the soybean milk.

As shown in fig. 4 and 5, the bean curd stick rounding device 2 comprises a rounding fixing column 21, the rounding fixing column 21 is fixedly arranged on the bean curd sheet forming frame body 11, a rounding mounting plate 22 is arranged on the rounding fixing column 21, a rounding roller 23 is movably arranged on the rounding mounting plate 22, the rounding roller 23 is connected with a rounding driving mechanism, and the rounding driving mechanism can drive the rounding roller 23 to move so as to round the sheet-shaped bean curd sheets into cylindrical bean curd sticks.

Specifically, two groups of rollers 24 are respectively arranged on two sides of the rounding mounting plate 22, each group of rollers 24 is two, the two rollers 24 are arranged up and down, the rollers 24 are U-shaped, and a channel is formed between the two rollers 24; the rounding roller 23 is connected with the rounding guide rail 25, the rounding roller 23 can rotate relative to the rounding guide rail 25, the rounding guide rail 25 is matched with a channel between the two rollers 24, and the rounding guide rail 25 can move relative to the rollers 24. The rounding driving mechanism is connected with the rounding guide rail 25 and can drive the rounding guide rail 25 to move. The rounding driving mechanism comprises a rounding connecting rod 26 and a rounding wheel 27, one end of the rounding connecting rod 26 is connected with the rounding guide rail 25, the other end of the rounding connecting rod 26 is connected with the rounding wheel 27, the rounding wheel 27 is connected with a rounding motor 28, and the rounding wheel 27 rotates to drive the rounding guide rail 25 to move left and right repeatedly.

The conveying device 3 comprises a conveying frame body 33, the conveying frame body 33 is fixedly connected with the beancurd sheet forming frame body 11, and the conveying frame body 33 is arranged above the beancurd sheet forming frame body 11. The conveying belt is annularly arranged on the conveying frame body 33, specifically, a first conveying rotating shaft 34 and a second conveying rotating shaft 35 are respectively arranged at two ends of the conveying frame body 33, and a third conveying rotating shaft 36 is arranged on the beancurd sheet forming frame body 11 at one side of the rounding fixing column 21 far away from the conveying frame body 33; the conveyor belt comprises a round rubbing part 31 and a conveying part 32, the conveyor belt is annularly arranged on three rotating shafts, the conveying part 32 is arranged between the first conveying rotating shaft 34 and the second conveying rotating shaft 35, and the round rubbing part 31 is arranged between the second conveying rotating shaft 35 and the third conveying rotating shaft 36. Preferably, the transfer frame body 33 is provided with a plurality of support plates 37, and the support plates 37 are disposed below the conveying unit 32 to support the conveying unit 32. It should be noted that the conveying frame 33 is further provided with a drying mechanism 38 for drying the dried beancurd sticks on the conveying portion 32. The drying mechanism 38 may be a fan or other conventional drying device.

Further, the rounding part 31 is connected with the conveying part 32, the conveying part 32 is arranged parallel to the crust groove 12 and above the crust groove 12, the rounding part 31 is arranged obliquely relative to the crust groove 12, one end of the rounding part 31 is arranged close to the crust groove 12, and the other end of the rounding part is connected with the conveying part 32. The rounding roller 23 is arranged above the rounding portion 31, and the rounding roller 23 can move left and right relative to the rounding portion 31 and can rotate relative to the rounding portion 31. It is noted that the height of the rounding mounting plate 22 is adjustable, so as to adjust the distance of the rounding roller 23 relative to the rounding portion 31.

As shown in fig. 1 and fig. 2, the bean curd stick rounding device 2 of this embodiment is disposed in the middle of the crust forming groove 12, a cutting component 5 is disposed on a side of the bean curd stick rounding device 2 away from the conveying frame 33, and the cutting component 5 can cut the bean curd sheets in the crust forming groove 12 into a plurality of pieces, so that a plurality of bean curd sticks are formed after being kneaded by the bean curd stick rounding device 2.

As shown in fig. 5, the slitting assembly 5 includes a cutter fixing seat 51, the cutter fixing seat 51 is disposed on two sides of the skinning groove 12, a cutter mounting shaft is disposed on the cutter fixing seat 51, and a sleeve of the cutter 52 is disposed on the cutter mounting shaft. The other end of the cutter 52 is provided with a circular blade which can rotate around the handle of the cutter 52. A cutting shaft 53 is arranged between the cutter fixing seat 51 and the rounding part 31, and the circular cutter blade can be abutted against the cutting shaft 53.

The skinning groove 12 comprises a first skinning groove 121, a second skinning groove 122 and a slurry discharge groove 123, and the first skinning groove 121, the slurry discharge groove 123 and the second skinning groove 122 are sequentially connected. It is noted that the stock discharge groove 123 is arranged on the side of the slitting shaft 53 far away from the bean curd stick rounding device 2. The soybean milk feeding port is respectively arranged at one end of the first crust groove 121 and the second crust groove 122 far away from the soybean milk discharging groove 123, the lower end of the soybean milk discharging groove 123 is provided with a soybean milk discharging port, and the soybean milk discharging port is connected with a soybean milk recovery device. The soybean milk is conveyed into the first skinning groove 121 and the second skinning groove 122 through the soybean milk feed port and flows into the soybean milk discharge groove 123, and the skinned low-concentration soybean milk flows into the soybean milk recovery device through the soybean milk discharge port. The stability of the content of nutrients such as protein in the soybean milk can be ensured by the arrangement, so that the quality of the dried beancurd sticks is ensured. In addition, the low-concentration soybean milk and the high-concentration soybean milk in the soybean milk recovery device can be continuously used after being mixed, so that the cost is saved.

The working principle of the invention is as follows: due to the flow of the soybean milk and the blowing of the air injection pipe 16, the beancurd sheets formed in the first beancurd sheet groove 121 and the second beancurd sheet groove 122 move towards the middle, the beancurd sheets formed in the first beancurd sheet groove 121 and the second beancurd sheet groove 122 are lifted at the position between the cutter fixing seat 51 and the slitting shaft 53 and are wound on the slitting shaft 53, and it is worth noting that the surfaces with the soybean milk of the beancurd sheets formed in the first beancurd sheet groove 121 and the second beancurd sheet groove 122 are attached together. The circular blades are abutted against the cutting shaft 53, so that the bean curd sheets are cut into a plurality of sheets, the plurality of sheets of bean curd sheets on the cutting shaft 53 are connected with the twisting part 31, cylindrical bean curd sticks are formed under the twisting of the twisting roller 23 and then are conveyed to the first conveying part for drying, and the dried bean curd sticks are conveyed to the packaging process of the bean curd sticks through the conveying part 32.

The bean curd stick processing device capable of automatically adjusting the pressure is ingenious in design, the pressure of the steam heating device is adjusted in real time through the pressure adjusting pipe and the pressure discharging pipe of the pressure adjusting tank, the pressure in the steam heating device is guaranteed through liquid seal, the temperature of the steam heating device is guaranteed, meanwhile, the steam heating device is prevented from exploding due to overpressure, and the safety coefficient is improved while the production efficiency is improved.

The present invention has been further described with reference to specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above-described embodiments by those of ordinary skill in the art after reading this specification are within the scope of the present invention.