Short-path distillation device

Abstract

The invention relates to the technical field of short-path distillation devices, in particular to a short-path distillation device which comprises a material injection assembly, a tank body, a distillation assembly and a mounting disc, a material discharging pipe is fixedly mounted on the left side of the tank body, an electromagnetic valve is fixedly mounted at one end of the material discharging pipe, and a supporting frame is fixedly mounted at the bottom of the tank body; a separation cover is fixedly installed on the inner wall of the tank body and is of an annular structure, and the inner side of the separation cover is higher than the outer side of the separation cover. A double-layer stacked structure is adopted, the heat conduction disc and the distillation disc are stacked, the distillation disc is arranged to be of a liftable structure, and when the heat conduction disc is heated by the heating pipe, the diffusion area of a liquid mixture at the top of the distillation disc can be increased by adjusting the matching degree of the distillation disc and the heat conduction disc; and under the condition that the ambient pressure value and temperature are not changed, the distillation separation of the liquid mixture is accelerated, so that the working efficiency of the short-path distillation device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of short-path distillation devices, and specifically relates to a short-path distillation device. Background Art

[0002] A short-path distillation device is an efficient liquid-liquid separation device, mainly used for separation under high vacuum conditions by utilizing the volatility differences of components in a liquid mixture. The short-path distillation device has the characteristics of low temperature, high vacuum, short heating time, high separation degree, environmental protection and no pollution, and is widely used in the fields of medicine, food, petroleum, etc. Therefore, in order to improve the working efficiency of the short-path distillation device, we propose a short-path distillation device.

[0003] The following defects still exist in the prior art during use: The distillation efficiency of the short-path distillation device in the prior art for liquid mixtures is not ideal enough. Different components of liquid mixtures require different temperatures during the distillation separation process, while the traditional short-path distillation device cannot precisely control the heating effect of the liquid mixture, and the diffusion area of the liquid mixture inside the short-path distillation device is fixed, resulting in the inability to improve the working efficiency of the traditional short-path distillation device and restricting the extended application of the short-path distillation device; When the prior art short-path distillation device injects a liquid mixture, since the short-path distillation device needs to work under high vacuum conditions, it is necessary to ensure that there is no large amount of gas in the liquid mixture during the injection process, and it is also necessary to inject the liquid mixture slowly according to the internal air pressure value of the short-path distillation device to ensure the effect of short-path distillation and the safety of the equipment. The traditional short-path distillation device cannot precisely complete vacuum injection, so the separation effect of the traditional short-path distillation equipment on liquid mixtures is not ideal enough.

[0004] In view of this, we propose a short-path distillation device to solve the existing problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a short-path distillation device to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A short-path distillation device includes a feeding assembly, a tank body, a distillation assembly and a mounting plate. A discharge pipe is fixedly installed on the left side of the tank body, and a solenoid valve is fixedly installed at one end of the discharge pipe. A support frame is fixedly installed at the bottom of the tank body. A separation cover is fixedly installed on the inner wall of the tank body. The separation cover is of an annular structure, and the inner side of the separation cover is higher than the outer side. The installation position of the separation cover is lower than the position of the discharge pipe orifice. A main control box is fixedly installed at the top of the tank body near the front position; On the left side of the tank body, above the discharge pipe, a feeding component is fixedly installed. The feeding component includes a suction pipe. At the top of the suction pipe, an electric telescopic rod is fixedly installed. The bottom end of the electric telescopic rod extends into the interior of the suction pipe, and at the bottom end of the electric telescopic rod, a piston disc is fixedly installed. The side wall of the piston disc abuts against the inner wall of the suction pipe, and several sealing rings are fixedly installed on the side wall of the piston disc. At the bottom of the suction pipe, a three-way pipe is fixedly installed. At the bottom of the three-way pipe, a feeding pipe is fixedly installed, and the feeding pipe extends to the central position inside the tank body. A valve is fixedly installed at the connection position between the feeding pipe and the three-way pipe; Inside the tank body, near the bottom position, a distillation component is fixedly installed; Inside the tank body, near the top position, a mounting plate is fixedly installed. Inside the mounting plate, several propulsion cylinders are installed through it. At the bottom of the propulsion cylinders, a condensation cover is fixedly installed.

[0007] Preferably, the distillation component includes a rotating shaft frame. At the bottom of the rotating shaft frame, a motor is fixedly installed. The output shaft of the motor penetrates through the rotating shaft frame and extends to the top of the rotating shaft frame, where a heat-conducting disc is fixedly installed. The heat-conducting disc is of a conical structure, and several arc-shaped teeth are arranged on the top of the heat-conducting disc. Inside the heat-conducting disc, several pneumatic telescopic rods are fixedly installed, and at the top of the pneumatic telescopic rods, a distillation disc is fixedly installed. The distillation disc is of a conical structure, and several card slots that match the heat-conducting disc are opened inside the distillation disc. At the bottom of the heat-conducting disc, an electrical box is fixedly installed, and several ring-shaped electric heating tubes are fixedly installed on the outside of the electrical box. Inside the electrical box, a temperature sensor and a pressure sensor are fixedly installed.

[0008] Preferably, several exhaust vents are opened on the right side of the tank body, and a heat dissipation fan is fixedly installed on the outer wall of the tank body at the position of the exhaust vents.

[0009] Preferably, a discharge valve is fixedly installed at the bottom of the tank body, and a discharge hole is opened at the bottom of the tank body at the installation position of the discharge valve.

[0010] Preferably, a vacuum pump is fixedly installed at the top of the tank body near the back position, and an air suction pipe extending into the interior of the tank body is fixedly installed on one side of the vacuum pump.

[0011] Preferably, the condensation cover is of a hollow conical structure, and the edge of the condensation cover abuts against the inner wall of the tank body. The condensation cover is made of a thermoelectric material.

[0012] Preferably, a control box is fixedly installed at the central position on the top of the mounting plate, and the control box is electrically connected to the propulsion cylinders and the condensation cover through wires respectively.

[0013] Preferably, a feed pipe is fixedly installed on the side of the three-way pipe, and a valve is fixedly installed at the connection position between the feed pipe and the three-way pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: By adopting a double-layer superimposed structure, the heat conduction plate and the distillation plate are superimposed and installed, and the distillation plate is set as a liftable structure. When the heat conduction plate is heated by the heating pipe, the area of diffusion of the liquid mixture on the top of the distillation plate can be increased by adjusting the degree of coincidence between the distillation plate and the heat conduction plate. Thus, without changing the ambient air pressure value and temperature, the distillation separation of the liquid mixture is accelerated, thereby improving the working efficiency of the short-path distillation device.

[0015] By adopting a tubular vacuum extraction method, when a liquid mixture storage container is externally connected to the feed pipe, the liquid mixture is quantitatively extracted, so that the liquid mixture enters the pumping pipe, and then the liquid mixture is slowly injected into the tank body, thereby realizing the precise feeding of the liquid mixture. And by utilizing the negative pressure environment inside the tank body, during the short-path distillation process, the liquid mixture inside the pumping pipe changes with the air pressure value inside the tank body and is pumped into the tank body, so that the injection amount and the separation amount of the liquid mixture are balanced, thereby ensuring the constancy of the air pressure value inside the tank body to ensure the safety during the working process of the short-path distillation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic three-dimensional sectional structure diagram of the present invention; Figure 2 is a schematic three-dimensional structure diagram of the present invention; Figure 3 is a schematic front sectional structure diagram of the present invention; Figure 4 is a schematic partial three-dimensional structure diagram of the feeding assembly of the present invention; Figure 5 is a schematic first partial three-dimensional structure diagram of the distillation assembly of the present invention; Figure 6 is a schematic second partial three-dimensional structure diagram of the distillation assembly of the present invention; Figure 7 is a schematic third partial three-dimensional structure diagram of the distillation assembly of the present invention; Figure 8 is Figure 7 a partial enlarged structure diagram at A in

[0017] In the figure: 1. Feeding component; 101. Electric telescopic rod; 102. Piston disc; 103. Material suction pipe; 104. Feed pipe; 105. Feeding pipe; 2. Tank body; 201. Discharge pipe; 202. Support frame; 203. Discharge valve; 204. Heat dissipation fan; 205. Air outlet; 206. Air extraction pipe; 207. Vacuum pump; 208. Main control box; 209. Separation cover; 3. Distillation component; 301. Rotating shaft frame; 302. Motor; 303. Distillation tray; 304. Heat conducting tray; 305. Pneumatic telescopic rod; 306. Electrical box; 307. Electric heating tube; 4. Installation disc; 401. Control box; 402. Condensation cover; 403. Propulsion cylinder. Detailed implementation manners

[0018] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] As Figure 1 - Figure 8 shown, a short-path distillation device proposed by the present invention includes a feeding component 1, a tank body 2, a distillation component 3 and an installation disc 4. A discharge pipe 201 is fixedly installed on the left side of the tank body 2, and a solenoid valve is fixedly installed at one end of the discharge pipe 201. A support frame 202 is fixedly installed at the bottom of the tank body 2. A separation cover 209 is fixedly installed on the inner wall of the tank body 2. The separation cover 209 is of a ring structure, and the inner side of the separation cover 209 is higher than the outer side. The installation position of the separation cover 209 is lower than the position of the orifice of the discharge pipe 201. A main control box 208 is fixedly installed at a position close to the front of the top of the tank body 2. The tank body 2 can provide an installation position for the surrounding components. The discharge pipe 201 can guide the separated liquid out of the tank body 2, so as to isolate the liquid discharged from the discharge valve 203, and avoid the re-fusion of the separated liquid. The support frame 202 can support the bottom of the tank body 2, thereby ensuring the overall stability of the device. After the separation cover 209 is connected to the inner wall of the tank body 2, the liquid flowing downward along the inner wall of the tank body 2 after condensation can be intercepted at the top of the separation cover 209, and the liquid can be discharged from the discharge pipe 201, so as to isolate the liquid collected after distillation condensation from the unvaporized liquid, so that after the liquid mixture is separated by distillation, it is discharged from different pipes out of the tank body 2. The main control box 208 can be connected to other electronic components inside the device through a cable, and then control the cooperation of each electronic component to work; On the left side of the tank body 2, above the discharge pipe 201, a feeding assembly 1 is fixedly installed. The feeding assembly 1 includes a material extraction pipe 103. At the top of the material extraction pipe 103, an electric telescopic rod 101 is fixedly installed. The bottom end of the electric telescopic rod 101 extends into the interior of the material extraction pipe 103, and a piston disc 102 is fixedly installed at the bottom end of the electric telescopic rod 101. The side wall of the piston disc 102 abuts against the inner wall of the material extraction pipe 103, and a plurality of sealing rings are fixedly installed on the side wall of the piston disc 102. At the bottom of the material extraction pipe 103, a tee pipe is fixedly installed. At the bottom of the tee pipe, a feeding pipe 105 is fixedly installed, and the feeding pipe 105 extends to the central position inside the tank body 2. A valve is fixedly installed at the connection position between the feeding pipe 105 and the tee pipe. The material extraction pipe 103 can cooperate with the piston disc 102. After an external pipeline is connected to the feeding pipe 104, the liquid mixture is drawn into the material extraction pipe 103, so as to inject the liquid mixture into the tank body 2 in a closed environment, avoiding injecting air into the tank body 2 during the feeding process. The electric telescopic rod 101 can expand and contract in the vertical direction, thereby pushing the piston disc 102 to perform reciprocating vertical movement, and then cooperate with the material extraction pipe 103 to extract the liquid mixture into the material extraction pipe 103, and then quantitatively inject the liquid mixture in the material extraction pipe 103 into the tank body 2. The feeding pipe 105 can guide the liquid mixture inside the material extraction pipe 103 into the tank body 2 and discharge it directly above the distillation assembly 3, so that the liquid mixture can diffuse at the top of the distillation assembly 3, and then the distillation separation is realized; Inside the tank body 2, near the bottom position, a distillation assembly 3 is fixedly installed. The distillation assembly 3 can perform centrifugal diffusion and electric heating on the liquid mixture, so that different components inside the liquid mixture are separated by distillation and extracted from the liquid mixture respectively; Inside the tank body 2, near the top position, a mounting plate 4 is fixedly installed. A number of propulsion cylinders 403 are installed through the interior of the mounting plate 4. At the bottom of the propulsion cylinder 403, a condensation cover 402 is fixedly installed. The mounting plate 4 can provide a mounting position for the surrounding components. The propulsion cylinder 403 can reciprocally expand and contract in the vertical direction, thereby pushing the condensation cover 402 to adjust the height, and then according to the actual use requirements, change the distance between the condensation cover 402 and the distillation assembly 3, and then adjust the short-range rectification effect of the device. The condensation cover 402 is made of thermoelectric material. By energizing the condensation cover 402, a temperature difference is generated in itself, and then the vaporized steam is absorbed and cooled, so that the steam is converted from a gaseous state to a liquid state at the bottom of the condensation cover 402, and then the liquefied extract flows along the tank body 2 to the top of the separation cover 209 and is discharged from the tank body 2.

[0020] Further, the distillation component 3 includes a rotating shaft frame 301. A motor 302 is fixedly installed at the bottom of the rotating shaft frame 301. The output shaft of the motor 302 penetrates through the rotating shaft frame 301 and extends to the top of the rotating shaft frame 301, where a heat conduction plate 304 is fixedly installed. The heat conduction plate 304 is of a conical structure, and a number of arc-shaped teeth are provided at the top of the heat conduction plate 304. A number of pneumatic telescopic rods 305 are fixedly installed inside the heat conduction plate 304, and a distillation plate 303 is fixedly installed at the top of the pneumatic telescopic rod 305. The distillation plate 303 is of a conical structure, and a number of card slots matching the heat conduction plate 304 are opened inside the distillation plate 303. An electrical box 306 is fixedly installed at the bottom of the heat conduction plate 304, and a number of annular electric heating tubes 307 are fixedly installed on the outer side of the electrical box 306. A temperature sensor and a pressure sensor are fixedly installed inside the electrical box 306. The rotating shaft frame 301 can be fixedly connected to the inner wall of the tank body 2 to provide an installation position for the surrounding components. The motor 302 is of the YE3-100KW type. After being powered on, the motor 302 can rotate, thereby driving the components at the top to rotate. The angle of each single rotation of the motor 302 is between 0 and 170 degrees, and after each rotation, it rotates in the reverse direction by the same angle, so that the liquid mixture falling on the top of the distillation component 3 is evenly diffused on the top of the distillation component 3 under the influence of centrifugal force. The heat conduction plate 304 can absorb the heat emitted by the electric heating tube 307 and conduct the heat into the distillation plate 303, and then cooperate with the distillation plate 303 to heat the liquid mixture at the top, thereby promoting the distillation separation of the liquid mixture. When needed, the distillation plate 303 can be pushed longitudinally by the pneumatic telescopic rod 305, so that part of the liquid mixture flows from the top of the distillation plate 303 to the top of the heat conduction plate 304, thereby increasing the diffusion area of the liquid mixture and improving the distillation efficiency of the liquid mixture. The electrical box 306 can be externally connected to a power source through a wire to supply power to the electric heating tube 307. The temperature sensor and the pressure sensor installed inside the electrical box 306 can detect the temperature and pressure values inside the tank body 2, so as to adjust the electric power of the electric heating tube 307 and the lifting height of the distillation plate 303 according to the detected temperature and pressure values, and then adjust the distillation speed of the liquid mixture. The temperature sensor is of the PT100 type, and the pressure sensor is of the GD5W type.

[0021] Further, a number of air outlets 205 are opened on the right side of the tank body 2, and a heat dissipation fan 204 is fixedly installed on the outer wall of the tank body 2 at the position of the air outlets 205. The air outlets 205 can make the air between the condensation cover 402 and the mounting plate 4 be extracted by the heat dissipation fan 204, thereby discharging the heat absorbed by the condensation cover 402, so as to facilitate the condensation cover 402 to maintain its own temperature at a lower level and ensure the condensation effect of the condensation cover 402 on the steam. The heat dissipation fan 204 is of the FDL-4C type, and the heat dissipation fan 204 can continuously extract air from the inside of the tank body 2, thereby cooling the condensation cover 402.

[0022] Furthermore, a discharge valve 203 is fixedly installed at the bottom of the tank body 2, and a discharge hole is provided at the bottom of the tank body 2 at the installation position of the discharge valve 203. The discharge valve 203 can discharge the unvaporized liquid from the bottom of the tank body 2, thereby realizing the extraction of different components of the liquid mixture.

[0023] Furthermore, a vacuum pump 207 is fixedly installed at a position near the back surface at the top of the tank body 2, and an air extraction pipe 206 extending into the interior of the tank body 2 is fixedly installed on one side of the vacuum pump 207. The vacuum pump 207 is of the E2M175 type. After the vacuum pump 207 is powered on, it can extract air from the interior of the tank body 2 through the air extraction pipe 206, so as to extract the air in the space below the condensation cover 402, making the space below the condensation cover 402 form a high-vacuum environment, so as to perform short-path distillation on the liquid mixture in a high-vacuum and low-temperature environment.

[0024] Furthermore, the condensation cover 402 is a hollow conical structure, and the edge of the condensation cover 402 abuts against the inner wall of the tank body 2. The condensation cover 402 is made of thermoelectric material.

[0025] Furthermore, a control box 401 is fixedly installed at the central position at the top of the mounting plate 4, and the control box 401 is electrically connected to the propulsion cylinder 403 and the condensation cover 402 through wires respectively. The control box 401 can supply power to the propulsion cylinder 403 and the condensation cover 402, and control the propulsion cylinder 403 and the condensation cover 402 to conduct electricity and work.

[0026] Furthermore, a feed pipe 104 is fixedly installed on the side surface of the three-way pipe, and a valve is fixedly installed at the connection position of the feed pipe 104 and the three-way pipe. The feed pipe 104 can be externally connected to a storage container, thereby facilitating the pumping of the liquid mixture into the device.

[0027] Working principle: After the device is assembled and checked to be correct, connect the feed pipe 104 to the container storing the liquid mixture externally, extract air from the interior of the tank body 2 through the vacuum pump 207 to make the space below the condensation cover 402 form a high-vacuum environment, push the condensation cover 402 to move longitudinally through the propulsion cylinder 403 to make the condensation cover 402 move to the set position, supply power to the condensation cover 402 through the control box 401, and at the same time, the heat dissipation fan 204 sucks the air above the condensation cover 402 to cool the condensation cover 402 and the space below it, drive the components at the top to rotate reciprocally through the motor 302, and at the same time, the electric heating tube 307 is powered on to generate heat to heat the heat conduction plate 304 and the distillation plate 303, completing the preset preparation of the short-path distillation device; During the feeding process, the electric telescopic rod 101 is used to push the piston disc 102 downward to empty the air inside the material suction pipe 103. Then, the valve at one end of the feeding pipe 105 is closed, and the valve at one end of the inlet pipe 104 is opened. The electric telescopic rod 101 pulls the piston disc 102 upward to draw the liquid mixture into the material suction pipe 103. After that, the valve at one end of the inlet pipe 104 is closed, and the valve at one end of the feeding pipe 105 is opened. By the combined force exerted by the electric telescopic rod 101 and the high-vacuum environment inside the tank body 2 on the liquid mixture, the liquid mixture is slowly injected into the tank body 2 and sprayed on the top of the distillation tray 303. During the short-path distillation process, the liquid mixture on the top is heated by the distillation tray 303. At the same time, according to the actual usage requirements, the pneumatic telescopic rod 305 is used to push the distillation tray 303 longitudinally, so that part of the liquid mixture penetrates and contacts the heat-conducting tray 304, enabling some components inside the liquid mixture to vaporize and rise. The vapor contacts the condensation cover 402 after rising and liquefies, flowing downward along the condensation cover 402 and the inner wall of the tank body 2 to the top of the separation cover 209, and then discharging from the tank body 2 along the discharge pipe 201. The unvaporized part of the liquid drops from the top of the distillation tray 303 and the heat-conducting tray 304 and is discharged from the bottom of the tank body 2 through the discharge valve 203, completing the short-path distillation extraction of the liquid mixture.

[0028] The above specific embodiments are merely several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant revelations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A short-path distillation device, comprising a feeding assembly (1), a tank body (2), a distillation assembly (3) and a mounting plate (4), characterized in that: On the left side of the tank body (2), a discharge pipe (201) is fixedly installed, and a solenoid valve is fixedly installed at one end of the discharge pipe (201). At the bottom of the tank body (2), a support frame (202) is fixedly installed. Inside the inner wall of the tank body (2), a separation cover (209) is fixedly installed. The separation cover (209) is of a ring structure, and the inner side of the separation cover (209) is higher than the outer side. The installation position of the separation cover (209) is lower than the position of the nozzle of the discharge pipe (201). At the position near the front of the top of the tank body (2), a main control box (208) is fixedly installed; Above the discharge pipe (201) on the left side of the tank body (2), a feeding component (1) is fixedly installed. The feeding component (1) includes a pumping pipe (103). At the top of the pumping pipe (103), an electric telescopic rod (101) is fixedly installed. The bottom end of the electric telescopic rod (101) extends into the interior of the pumping pipe (103), and a piston disc (102) is fixedly installed at the bottom end of the electric telescopic rod (101). The side wall of the piston disc (102) abuts against the inner wall of the pumping pipe (103), and a plurality of sealing rings are fixedly installed on the side wall of the piston disc (102). At the bottom of the pumping pipe (103), a tee pipe is fixedly installed. At the bottom of the tee pipe, a feeding pipe (105) is fixedly installed, and the feeding pipe (105) extends to the central position inside the tank body (2). A valve is fixedly installed at the connection position of the feeding pipe (105) and the tee pipe; Near the bottom position inside the tank body (2), a distillation component (3) is fixedly installed; Near the top position inside the tank body (2), a mounting plate (4) is fixedly installed. A plurality of propulsion cylinders (403) are installed through the mounting plate (4). At the bottom of the propulsion cylinders (403), a condensation cover (402) is fixedly installed.

2. The short-path distillation device according to claim 1, characterized in that: The distillation component (3) includes a rotating shaft frame (301). At the bottom of the rotating shaft frame (301), a motor (302) is fixedly installed. The output shaft of the motor (302) passes through the rotating shaft frame (301) and extends to the top of the rotating shaft frame (301) to fixedly install a heat conduction plate (304). The heat conduction plate (304) is of a conical structure, and a plurality of arc-shaped teeth are arranged at the top of the heat conduction plate (304). Inside the heat conduction plate (304), a plurality of pneumatic telescopic rods (305) are fixedly installed, and at the top of the pneumatic telescopic rods (305), a distillation plate (303) is fixedly installed. The distillation plate (303) is of a conical structure, and a plurality of card slots matching the heat conduction plate (304) are opened inside the distillation plate (303). At the bottom of the heat conduction plate (304), an electrical box (306) is fixedly installed, and a plurality of annular electric heating tubes (307) are fixedly installed on the outer side of the electrical box (306). A temperature sensor and a pressure sensor are fixedly installed inside the electrical box (306).

3. A short-path distillation apparatus according to claim 1, characterized in that: On the right side of the tank body (2), a plurality of air discharge ports (205) are opened, and a heat dissipation fan (204) is fixedly installed on the outer wall of the tank body (2) at the position of the air discharge ports (205).

4. A short-path distillation device according to claim 1, characterized in that: A discharge valve (203) is fixedly installed at the bottom of the tank body (2), and a discharge hole is provided at the bottom of the tank body (2) at the installation position of the discharge valve (203).

5. A short-path distillation apparatus according to claim 1, characterized in that: A vacuum pump (207) is fixedly installed near the back position at the top of the tank body (2), and an air extraction pipe (206) extending into the interior of the tank body (2) is fixedly installed on one side of the vacuum pump (207).

6. The short-path distillation apparatus according to claim 1, characterized in that: The condensation cover (402) is a hollow conical structure, and the edge of the condensation cover (402) abuts against the inner wall of the tank body (2). The condensation cover (402) is made of a thermoelectric material.

7. A short-path distillation apparatus according to claim 1, characterized in that: A control box (401) is fixedly installed at the central position at the top of the mounting plate (4), and the control box (401) is electrically connected to the propulsion cylinder (403) and the condensation cover (402) respectively through wires.

8. A short-path distillation apparatus according to claim 1, characterized in that: A feed pipe (104) is fixedly installed on the side of the tee pipe, and a valve is fixedly installed at the connection position of the feed pipe (104) and the tee pipe.

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