Automatic ton bottle air tightness test device

Abstract

The utility model discloses an automatic ton bottle air tightness test device, which comprises a feeding mechanism, a feeding buffer mechanism, a test mechanism, a discharging buffer mechanism and a discharging mechanism, and is characterized in that an included angle gamma between a platform of the feeding buffer mechanism and the horizontal direction is greater than an included angle beta between a table top of a material frame table and the horizontal direction; the included angle beta between the table top of the material frame table and the horizontal direction is larger than the included angle alpha between the platform of the discharging buffer mechanism and the horizontal direction, and the table top of the air tightness test device is obliquely arranged, so that the ton bottles can be automatically conveyed to the discharging buffer mechanism from the feeding buffer mechanism without manual work. In addition, buffering baffles are arranged on a feeding buffering mechanism platform and a discharging buffering mechanism platform, the ton bottles are prevented from rolling down, the automation degree is high, and the labor cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection, in particular to an automated air tightness test device for ton bottles. Background Art

[0002] Gas cylinders are tools for storing various liquids and gases. They can be divided into steel cylinders, aluminum cylinders, stainless steel cylinders, etc. according to their materials; and they can be divided into small, medium and large types according to their models. Gas cylinders have the characteristics of high working pressure, light weight, cleanliness, safety and reliability, and are widely used in people's daily lives and industrial production. Since gas cylinders are filled with high-pressure gas or liquid, it is very necessary to test the air tightness of the gas cylinders. In addition, the air tightness test methods for gas cylinders of different materials and models are not exactly the same, and thus the air tightness test equipment is not exactly the same. In addition, the larger the gas cylinder, the more compressed gas is required for the air tightness test. Generally, emptying the compressed gas after the test will cause great waste. Therefore, it is very necessary to design a unique and suitable automated ton-bottle air tightness test device. Utility Model Content

[0003] The utility model discloses an automated ton-bottle airtightness test device, which comprises:

[0004] A feeding mechanism, comprising a feeding platform, wherein the feeding platform is driven by a feeding transmission mechanism via a feeding wheel;

[0005] A feeding buffer mechanism, comprising a feeding buffer baffle;

[0006] The testing mechanism includes a material frame for placing ton bottles, a pressing mechanism and a water tank, wherein the material frame is provided with a material frame platform at the bottom, the pressing mechanism is provided with a pressing platform, and the ton bottles are placed between the pressing platform and the material frame platform and immersed in the water tank;

[0007] A material unloading buffer mechanism, comprising a material unloading buffer baffle;

[0008] A material unloading mechanism, comprising a material unloading platform, wherein the material unloading platform is driven by a material unloading transmission mechanism via a material unloading wheel;

[0009] The angle between the table top of the loading buffer mechanism and the horizontal direction is γ, the angle between the table top of the material frame table and the horizontal direction is β, and the angle between the table top of the unloading buffer mechanism and the horizontal direction is α, α<β<γ.

[0010] In one embodiment, the angles α, β and γ are in the range of 0<γ<5°, 0<β<3°, and 0<α<2°.

[0011] More preferably, 0<γ<3°, 0<β<2°, and 0<α<1°.

[0012] In one embodiment, the testing mechanism further includes a driving mechanism for controlling the lifting of the material frame, a guiding mechanism for controlling the lifting of the material frame, and a baffle mechanism for preventing the ton bottles from rolling.

[0013] In one embodiment, the driving mechanism drives the material frame to move up and down via a chain.

[0014] In one embodiment, the loading buffer baffle and / or the unloading buffer baffle is one of a fan-shaped, square-shaped, arc-shaped, and stepped-shaped baffle.

[0015] In one embodiment, the side surface of the pressing platform is in a shape of a straight line, a ridge, an arc, or a wave.

[0016] In one embodiment, it includes a plurality of automated ton-bottle airtightness testing devices arranged in parallel.

[0017] In one embodiment, the plurality of air tightness testing devices include a first air tightness testing device and a second air tightness testing device, wherein the first air tightness testing device is provided with a first ton bottle, and the second air tightness testing device is provided with a second ton bottle.

[0018] In one embodiment, the first ton bottle is connected to the first air intake pipe, the second ton bottle is connected to the second air intake pipe, the first air intake pipe and the second air intake pipe are connected to the branch air intake pipe, and the branch air intake pipe is connected to the main air intake pipe; wherein the branch air intake pipe is provided with a branch air intake valve, and the branch air intake valve is located between a first intersection point between the first air intake pipe and the branch air intake pipe and a second intersection point between the branch air intake pipe and the main air intake pipe.

[0019] In one embodiment, the first intake pipe is provided with a first intake valve, and the second intake pipe is provided with a second intake valve. The first intake valve is located between the third intersection of the exhaust pipe and the first intake pipe and the fourth intersection of the first intake pipe and the branch intake pipe, and the second intake valve is located between the fifth intersection of the exhaust pipe and the second intake pipe and the sixth intersection of the second intake pipe and the branch intake pipe.

[0020] In one embodiment, the first air intake pipe and the second air intake pipe are respectively connected to an exhaust pipe, and the exhaust pipe is provided with a first exhaust valve for controlling the first ton bottle and a second exhaust valve for controlling the second ton bottle.

[0021] The airtightness test process is as follows:

[0022] S1 loading mechanism lifts up the ton bottles for loading;

[0023] S2 ton bottles enter the loading buffer mechanism and the loading buffer baffle is raised;

[0024] S3 lowers the loading buffer baffle, the ton bottle enters the testing mechanism, raises the baffle mechanism, and the material frame and the downward pressure mechanism lower at the same time, immersing the ton bottle in the water tank. The downward pressure mechanism presses the ton bottle tightly and fills the ton bottle with compressed gas. The air tightness of the ton bottle is judged by manual or intelligent recognition technology;

[0025] S4 lowers the baffle mechanism and raises the unloading buffer baffle. The ton bottles that have completed the air tightness test enter the unloading buffer mechanism and wait for unloading.

[0026] S5 lowers the unloading buffer baffle, and the ton bottles naturally roll down to the unloading mechanism, completing the unloading.

[0027] The utility model also provides a system of an automated ton-bottle air tightness test device, which comprises a plurality of ton-bottles arranged in parallel, with parallel air inlet pipes provided between the ton-bottles;

[0028] The plurality of intake pipes are connected to a plurality of branch intake pipes, which are connected to a main intake pipe; wherein the branch intake pipes are provided with branch intake valves, which are located between the intersection of the intake pipes and the branch intake pipes and the intersection of the branch intake pipes and the main intake pipe;

[0029] An exhaust pipe is provided between the parallel intake pipes, and a plurality of corresponding exhaust valves are provided on the exhaust pipe;

[0030] The air intake pipe is provided with an air intake valve, and the air intake valve is located between the intersection point of the exhaust pipe and the branch air intake pipe and the intersection point of the air intake pipe and the branch air intake pipe.

[0031] In one embodiment, it includes the first ton bottle and the second ton bottle arranged in parallel;

[0032] The first ton bottle is connected to the first air inlet pipe, which is provided with a first digital pressure transmitter and a first pressure gauge. The second ton bottle is connected to the second air inlet pipe, which is provided with a second digital pressure transmitter and a second pressure gauge.

[0033] Among them, the distance between the first digital pressure transmitter and the first ton bottle is smaller than the distance between the first pressure gauge and the first ton bottle; the distance between the second digital pressure transmitter and the second ton bottle is smaller than the distance between the second pressure gauge and the second ton bottle.

[0034] In one embodiment, the exhaust pipe is provided with a first exhaust valve for controlling exhaust of the first ton bottle and a second exhaust valve for controlling exhaust of the second ton bottle.

[0035] In one embodiment, the first pressure gauge includes a first working pressure gauge and a first calibration pressure gauge, and the accuracy of the first calibration pressure gauge is higher than that of the first working pressure gauge; the second pressure gauge includes a second working pressure gauge and a second calibration pressure gauge, and the accuracy of the second calibration pressure gauge is higher than that of the second working pressure gauge.

[0036] When the first ton bottle guides gas to the second ton bottle, the first digital pressure transmitter displays the gas pressure in the first ton bottle; the second digital pressure transmitter displays the gas pressure in the second ton bottle.

[0037] The overall gas flow is as follows:

[0038] First, open the sub-inlet valve and the first inlet valve, and perform an air tightness test on the first ton bottle. When performing the air tightness test on the first ton bottle, the first inlet valve needs to be closed;

[0039] Second, after completing the air tightness test of the first ton bottle, close the sub-air inlet valve, open the first air inlet valve and the second air inlet valve, and guide the air from the first ton bottle to the second ton bottle;

[0040] Third, the air pressure is balanced, and the difference between the value of the first digital pressure transmitter and the value of the second digital pressure transmitter ranges from -1.5 MPa to 1.5 MPa;

[0041] Fourth, close the first air inlet valve, open the first exhaust valve, discharge the remaining compressed gas in the first ton bottle, and at the same time open the sub-air inlet valve to inflate the second ton bottle;

[0042] Fifth, when the second ton bottle is undergoing an air tightness test, close the second air inlet valve. After the air tightness test is completed, close the sub-air inlet valve, open the first air inlet valve and the second air inlet valve to complete the air guide of the second ton bottle, and repeat the third and fourth steps;

[0043] Sixth, repeat steps 1 to 5.

[0044] Technical effects:

[0045] 1. A gas guide system is provided between the two air tightness test devices arranged in parallel, so that the compressed gas in the ton bottle can be conducted, the compressed gas is recycled and resources are saved.

[0046] 2. The table of the air tightness test device is tilted. The angle between the loading buffer mechanism platform and the horizontal direction is greater than the angle between the unloading buffer mechanism platform and the horizontal direction, so as to facilitate the automatic entry of ton bottles into the test mechanism and the unloading mechanism.

[0047] 3. A material frame is provided at the test mechanism, and the ton bottle is placed in the material frame. A downward pressure mechanism is provided above the ton bottle, and the ton bottle is located between the material frame and the downward pressure mechanism, forming a "sandwich" structure, so that the ton bottle can be quickly tested for air tightness at a high temperature in the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a three-dimensional diagram of an automated ton-bottle air tightness test device of the utility model;

[0049] Figure 2 This is a side view of an automated ton-bottle air tightness test device of the utility model;

[0050] Figure 3 This is a side view of the feeding mechanism and feeding buffer mechanism of an automated ton-bottle air tightness test device of the utility model;

[0051] Figure 4 This is a side view of the test mechanism of an automated ton-bottle air tightness test device of the utility model;

[0052] Figure 5 This is a side view of the unloading mechanism and unloading buffer mechanism of an automated ton-bottle air tightness test device of the utility model;

[0053] Figure 6 This is a schematic diagram of the tilt setting angle of the table of an automated ton-bottle air tightness test device of the utility model;

[0054] Figure 7 This is a schematic diagram of the gas guide system of an automated ton-bottle air tightness test device of the utility model. DETAILED DESCRIPTION

[0055] The utility model discloses an automated ton-bottle air tightness test device, which includes two air tightness test devices connected in parallel. The table of a single air tightness test device is tilted. The air tightness test device includes a loading mechanism, a loading buffer mechanism, a testing mechanism, a unloading buffer mechanism, and a unloading mechanism. The angle between the loading buffer mechanism platform and the horizontal direction is greater than the angle between the unloading buffer mechanism platform and the horizontal direction. Buffer baffles are provided on the loading buffer mechanism and the unloading buffer mechanism platform to prevent the ton-bottle from rolling. In addition, an air guide system is used between the two air tightness test devices to transmit compressed gas between the ton-bottles on the two air tightness test devices, thereby achieving air pressure balance, saving compressed gas, and saving costs.

[0056] See also Figure 1 The present application discloses an air tightness test device, which includes a first air tightness test device 100A and a second air tightness test device 100B, which form a parallel structure, and the air intake valves on the two are controlled by an air control console 200.

[0057] See further Figure 2-5Taking the first airtightness test device 100A as an example, it includes a loading mechanism 1, a loading buffer mechanism 2, a testing mechanism 3, a unloading buffer mechanism 4 and a unloading mechanism 5. The ton bottles 6 pass through the loading mechanism 1, the loading buffer mechanism 2, the testing mechanism 3, the unloading buffer mechanism 4 and the unloading mechanism 5 in sequence, thereby completing the airtightness test. The loading mechanism 1 includes a loading platform 11, and the loading platform 11 is driven by the loading transmission mechanism 13 through the loading wheel 12 to load the ton bottles 6. In order to prevent the ton bottles 6 from rolling off, a first protrusion 111 is provided on the side of the loading platform 11 away from the loading wheel 12. The loading transmission mechanism 13 includes a loading transmission wheel 131 and a loading steel wire 132. One end of the loading steel wire 132 is wound around the loading transmission wheel 131, and the other end is wound around the loading wheel 12. The rotation of the loading transmission wheel 131 drives the loading wheel 12 to move, thereby driving the loading platform 11 to reciprocate up and down to complete the loading. The loading buffer mechanism 2 includes a first cylinder 21 and a loading buffer baffle 22. The loading buffer baffle 22 is fan-shaped and can also be configured with square, arc-shaped, or stepped bumps. The first cylinder 21 drives the loading buffer baffle 22 up and down to smoothly block and release the ton bottles 6. This prevents congestion caused by the loading of new materials before the testing mechanism 3 is completed. The loading buffer mechanism 2 can avoid such a situation.

[0058] The testing mechanism 3 includes a material frame 31 for placing the ton bottles 6, a drive mechanism 32 for controlling the raising and lowering of the material frame 31, a guide mechanism 33 for preventing the material frame 31 from shifting, a baffle mechanism 34 for preventing the ton bottles 6 from rolling, a pressing mechanism 35, and a water tank 36. A material frame platform 311 is provided at the bottom of the material frame 31, and a pressing platform 351 is provided at the bottom of the pressing mechanism 35. The ton bottles 6 are placed between the material frame platform 311 and the pressing platform 351, forming a "sandwich" structure. The side of the pressing platform 351 can be straight, ridged, curved, or wavy, preferably ridged to better fit the ton bottles 6. The drive mechanism 32 drives the material frame 31 to rise and fall via a chain 321. To prevent the material frame 31 from shifting during the lifting process, guide mechanisms 33 are provided around the material frame 31. The guide mechanisms 33 are preferably guide wheels.

[0059] The unloading buffer mechanism 4 includes a second cylinder 41 and a unloading buffer baffle 42. The unloading buffer baffle 42 is raised and lowered by the second cylinder 41. The unloading buffer baffle 42 is fan-shaped. The unloading buffer baffle 42 can also be a square bump setting, an arc-shaped bump setting, a stepped bump setting, etc.

[0060] The unloading mechanism 5 includes an unloading platform 51, an unloading wheel 52, and an unloading transmission mechanism 53. The unloading platform 51 is driven up and down by the unloading transmission mechanism 53 via the unloading wheel 52 to complete the unloading operation. The unloading platform 51 has a second protrusion 511 at the end away from the unloading wheel 52 to prevent the ton bottles 6 from rolling off the unloading platform 51.

[0061] For further explanation, please refer to Figure 6 The tabletop of the first airtightness testing device 100A is tilted. The angle between the tabletop of the loading buffer mechanism 2 and the horizontal direction is γ, where 0 < γ < 5°. The angle between the tabletop of the material frame platform 311 and the horizontal direction is β, where 0 < β < 3°. The angle between the tabletop of the unloading buffer mechanism 4 and the horizontal direction is α, where 0 < α < 2°, where α < β < γ. The tabletop extending from the loading mechanism 1 to the unloading mechanism 5 is tilted, allowing the ton bottles 6 to automatically move from the loading mechanism 1 to the unloading mechanism 5 without external force.

[0062] The airtightness test process is as follows:

[0063] S1 loading mechanism 1 lifts the ton bottle 6 for loading;

[0064] S2 ton bottles 6 enter the loading buffer mechanism 2, and the loading buffer baffle 22 is raised;

[0065] S3 lowers the loading buffer baffle 22, and the ton bottle 6 enters the testing mechanism 3. The baffle mechanism 34 is raised, and the material frame 31 and the pressing mechanism 35 are lowered at the same time, and the ton bottle 6 is immersed in the water tank 36. The pressing mechanism presses the ton bottle 6 tightly and fills the ton bottle 6 with compressed gas. The air tightness of the ton bottle 6 is judged by manual or intelligent recognition technology;

[0066] S4: lower the baffle mechanism 34, raise the unloading buffer baffle 42, and the ton bottle 6 that has completed the air tightness test enters the unloading buffer mechanism 4 to wait for unloading;

[0067] S5 lowers the unloading buffer baffle 42, and the ton bottles naturally roll down to the unloading mechanism 5, completing the unloading.

[0068] See also Figure 1 and Figure 7, the present application discloses a gas guide system 7, in which two ton bottles 6 form a parallel structure between the first air tightness test device 100A and the second air tightness test device 100B. When performing an air tightness test on the first ton bottle 6A in the first air tightness test device 100A, the main air intake pipe 71 is inflated, and a pressure gauge 711 is provided on the main air intake pipe, which is used to display the pressure of the compressed gas in the main air intake pipe 71, so as to facilitate the control of the pressure inside the first ton bottle 6A. The main air intake pipe 71 can be divided into a plurality of branch air intake pipes 72, and the branch air intake pipes 72 include a first air intake pipe 721 and a second air intake pipe 722. The branch air intake valve 712 on the branch air intake pipe 72 and the first air intake valve 7211 on the first air intake pipe 721 are opened to allow compressed gas to enter the first ton bottle 6A. When performing an air tightness test on the first ton bottle 6A, the first air intake valve 7211 needs to be closed at this time. The branch air intake valve 712 is located between the branch air intake pipe 72 and the main air intake pipe. The first air intake valve 7211 is located between the second intersection of the first air intake pipe 721 and the exhaust pipe 73 and the fourth intersection of the branch air intake pipe 72 and the first air intake pipe 721. Similarly, the second air intake valve 7221 is located between the fifth intersection of the second air intake pipe 722 and the exhaust pipe 73 and the sixth intersection of the branch air intake pipe 72 and the second air intake pipe 722.

[0069] To avoid wasting the compressed gas in the first ton bottle 6A, the present invention discloses a gas guide system 7 that conducts the compressed gas in the first ton bottle 6A to the second ton bottle 6B. By closing the sub-intake valve 712 and opening the first inlet valve 7211 on the first inlet pipe 721 and the second inlet valve 7221 on the second inlet pipe 722, the compressed gas in the first ton bottle 6A is conducted to the second ton bottle 6B. A first working pressure gauge 7212, a first calibration pressure gauge 7213 for calibration, and a first digital pressure transmitter 7214 for real-time display of pressure changes in the first ton bottle 6A are provided on the first inlet pipe 721, depending on the distance from the first inlet valve 7211. The first working pressure gauge 7212 has a lower accuracy than the first calibration pressure gauge 7213. Similarly, the second intake pipe 722 is provided with a second working pressure gauge 7222, a second calibration pressure gauge 7223, and a second digital pressure transmitter 7224 for displaying pressure changes within the second ton bottle 6B, in sequence, based on the distance from the second intake valve 7221. When the pressures in the first ton bottle 6A and the second ton bottle 6B are balanced, that is, the difference between the value of the first digital pressure transmitter 7214 and the value of the second digital pressure transmitter 7224 is between -1.5 MPa and 1.5 MPa, more preferably between -1 MPa and 1 MPa, and even more preferably between -0.5 MPa and 0.5 MPa, the compressed gas in the first ton bottle 6A needs to be exhausted from the exhaust pipe 73, one end of which is connected to the first ton bottle 6A and the other end is connected to the muffler 733. Close the first air inlet valve 7221 and open the first air outlet valve 731 to discharge the remaining compressed gas in the first ton bottle 6A to the muffler 733. Simultaneously, inflate the second ton bottle 6B for an airtightness test. Close the second air inlet valve 7221 to simultaneously degas the first ton bottle 6A and inflate the second ton bottle 6B. This saves time and eliminates the need to start inflicting air on the second ton bottle 6B from scratch, thus reducing costs. Open the first air inlet valve 7211 and the second air inlet valve 7221. After the airtightness test is completed, the second ton bottle 6B and the new first ton bottle 6A-1 are re-equilibrated to achieve a new equilibrium. Close the second air inlet valve 7221 and open the second air outlet valve 732 to discharge the remaining compressed gas in the ton bottle 6B through the exhaust pipe 73 to the muffler 733. This recycling process conserves compressed gas and reduces costs.

[0070] In other embodiments, the main air intake pipe 71 can be divided into two branch air intake pipes 72, that is, one main air intake pipe can lead to two branch air intake pipes 72 at the same time, and each branch air intake pipe 72 is then connected to the first air intake pipe 721 and the second air intake pipe 722. The two air guide systems 7 are carried out at the same time, which greatly saves the air tightness test time.

[0071] In other embodiments, the main air intake pipe 71 can be divided into multiple branch air intake pipes 72, that is, one main air intake pipe can lead to multiple branch air intake pipes 72 at the same time, and each branch air intake pipe 72 is then connected to the first air intake pipe 721 and the second air intake pipe 722, and multiple air guide systems 7 are operated simultaneously.

[0072] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. An automated ton-bottle air tightness test device, characterized by: It includes: A feeding mechanism, comprising a feeding platform, wherein the feeding platform is driven by a feeding transmission mechanism via a feeding wheel; A feeding buffer mechanism, comprising a feeding buffer baffle; The testing mechanism includes a material frame for placing ton bottles, a pressing mechanism and a water tank, wherein the material frame is provided with a material frame platform at the bottom, the pressing mechanism is provided with a pressing platform, and the ton bottles are placed between the pressing platform and the material frame platform and immersed in the water tank; A material unloading buffer mechanism, comprising a material unloading buffer baffle; A material unloading mechanism, comprising a material unloading platform, wherein the material unloading platform is driven by a material unloading transmission mechanism via a material unloading wheel; The angle between the table top of the loading buffer mechanism and the horizontal direction is γ, the angle between the table top of the material frame table and the horizontal direction is β, and the angle between the table top of the unloading buffer mechanism and the horizontal direction is α, α<β<γ.

2. The automated ton-bottle airtightness test device according to claim 1 is characterized by: The ranges of the angles α, β and γ are 0<γ<5°, 0<β<3°, and 0<α<2°.

3. The automated ton-bottle airtightness test device according to claim 1 is characterized in that: The testing mechanism also includes a driving mechanism for controlling the lifting of the material frame, a guiding mechanism for controlling the lifting of the material frame, and a baffle mechanism for preventing the ton bottles from rolling.

4. The automated ton-bottle airtightness test device according to claim 3 is characterized by: The driving mechanism drives the material frame to move up and down through a chain.

5. The automated ton-bottle airtightness test device according to claim 1 is characterized by: The loading buffer baffle and / or the unloading buffer baffle are one of fan-shaped, square-shaped, arc-shaped, and stepped-shaped; the side shape of the lower pressing platform is one of straight-line, ridge-shaped, arc-shaped, and wavy.

6. The automated ton-bottle airtightness test device according to claim 1, characterized in that: The invention comprises a plurality of automated ton-bottle airtightness testing devices arranged in parallel.

7. The automated ton-bottle airtightness test device according to claim 6, characterized in that: The plurality of air tightness testing devices include a first air tightness testing device and a second air tightness testing device. The first air tightness testing device is provided with a first ton bottle, and the second air tightness testing device is provided with a second ton bottle.

8. The automated ton-bottle airtightness test device according to claim 7, characterized in that: The first ton bottle is connected to the first air intake pipe, the second ton bottle is connected to the second air intake pipe, the first air intake pipe and the second air intake pipe are connected to the branch air intake pipe, and the branch air intake pipe is connected to the main air intake pipe; wherein the branch air intake pipe is provided with a branch air intake valve, and the branch air intake valve is located between a first intersection point between the first air intake pipe and the branch air intake pipe and a second intersection point between the branch air intake pipe and the main air intake pipe.

9. The automated ton-bottle airtightness test device according to claim 8, characterized in that: The first intake pipe is provided with a first intake valve, and the second intake pipe is provided with a second intake valve. The first intake valve is located between the third intersection of the exhaust pipe and the first intake pipe and the fourth intersection of the first intake pipe and the branch intake pipe, and the second intake valve is located between the fifth intersection of the exhaust pipe and the second intake pipe and the sixth intersection of the second intake pipe and the branch intake pipe.

10. The automated ton-bottle airtightness test device according to claim 9, characterized in that: The first air intake pipe and the second air intake pipe are respectively connected to an exhaust pipe, and the exhaust pipe is provided with a first exhaust valve for controlling the first ton bottle and a second exhaust valve for controlling the second ton bottle.

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