Fireproof auxiliary equipment for computer room

Abstract

The invention discloses fireproof auxiliary equipment for a computer room, and relates to the field of fireproof of the computer room, the fireproof auxiliary equipment comprises a cabinet body, a bottom box and a heat dissipation hole, the bottom box is located at the bottom of the cabinet body, a sealing gasket is arranged in the heat dissipation hole, and the sealing gasket is connected between the inner side wall of the heat dissipation hole and the outer wall of a rotating shell in a sealing manner; a cooling fan is arranged in the rotating shell, the top of the rotating shell is connected to a gear system, the gear system can drive the rotating shell to rotate so that a front outlet and a rear outlet of the cooling fan can be sealed by the rotating shell, and a sand injection assembly is further arranged on the side face of the bottom box. The sand injection assembly can inject fine sand and water into a closed space formed by the rotating shell and the cooling fan after the rotating shell rotates and seals the cooling fan, a wire outlet hole is further formed in the side wall of the bottom box, and the side face of the wire outlet hole is connected to the medicine bin through a piston rod. The medicine bin is installed at the bottom of the rotating shell and can be activated to push the piston rod to operate through the change of the weight of the rotating shell.

Description

Technical Field

[0001] The present invention relates to the field of computer room fire prevention, and specifically to a fire prevention auxiliary device for a computer room. Background Art

[0002] A computer room is mainly composed of multiple groups of cabinets stored in the room. The general structure of the cabinet is a cabinet body. To cope with possible fires, the material used for the cabinet body is a metal material, and a fireproof coating is applied on the surface. This can protect the cabinet body from catching fire and protect the internal components. However, when a fire occurs in the external environment, the high-temperature gas or flame generated by the fire is very easy to enter the cabinet body through the heat dissipation holes and wiring holes on the cabinet body, causing burning to these circuits and components. In addition, since the heat dissipation holes and wire outlet holes are essential parts, these positions are always connected to the external environment, and the external high-temperature gas or flame is very easy to enter the power distribution cabinet through these heat dissipation holes, causing losses. Although there are some valve devices in the prior art that are installed at the heat dissipation holes and can realize automatic opening and closing functions through software and hardware systems, generally, these heat dissipation holes are flush with the side of the cabinet body. After being closed, the enclosed space inside the heat dissipation holes is small, which is not conducive to heat insulation, and the external high-temperature air is very easy to pass through. At the same time, these functions require an external or internal power supply. The external power supply is very easy to cut off power during a fire, while the internal power supply will increase the volume of the cabinet body and is also a potential trouble prone to failure, and regular inspection and maintenance are required. Summary of the Invention

[0003] The purpose of the present invention is to provide a fire prevention auxiliary device for a computer room to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A fire prevention auxiliary device for a computer room, including a cabinet body, a bottom box, and heat dissipation holes on both sides of the bottom box. The bottom box is located at the bottom of the cabinet body. A sealing gasket is provided in the heat dissipation hole, and the sealing gasket is sealingly connected between the inner side wall of the heat dissipation hole and the outer wall of a rotating shell. A heat dissipation fan is provided in the rotating shell. The top of the rotating shell is connected to a gear system, and the gear system can drive the rotating shell to rotate so that the rotating shell closes the front and rear outlets of the heat dissipation fan. A sand injection assembly is further provided on the side of the bottom box. The sand injection assembly can inject fine sand and water into the enclosed space formed by the rotating shell and the heat dissipation fan after the rotating shell rotates and closes the heat dissipation fan. An outlet hole is also provided on the side wall of the bottom box. The side of the outlet hole is connected to a medicine box through a piston rod. The medicine box is installed at the bottom of the rotating shell and can be activated to push the piston rod to operate by the change in the weight of the rotating shell.

[0005] Preferably, a grid plate is provided between the cabinet body and the bottom box.

[0006] Preferably, the rotating housing is a hollow sphere. A rotating shaft is provided at the top of the rotating housing. The upper end of the rotating shaft passes through the sealing gasket and extends out to be connected with a gear system. A pressing column is provided at the bottom of the rotating housing. The pressing column extends downward through the sealing gasket and is rotatably connected inside the side wall of the bottom box. A first leakage hole is provided on the rotating housing.

[0007] Preferably, the cooling fan includes a spherical shell and fan blades. The fan blades are installed inside the spherical shell. Fixed shafts are provided at both the upper and lower ends of the spherical shell. The upper and lower fixed shafts respectively pass through the rotating shaft and the pressing column and are fixedly connected inside the side wall of the bottom box. Both ends of the rotating housing exceed both ends of the spherical shell. A second leakage hole is provided on the spherical shell.

[0008] Preferably, the gear system includes a bevel gear set, a gear, a rack, a push rod, and an air chamber. One end of the bevel gear set is connected to the rotating housing, and the other end is installed on a gear shaft. The gear shaft is installed inside the side wall of the bottom box through a bracket. The gear is installed on the gear shaft. A rack is engaged with the gear. The end of the rack is connected to the push rod. The head of the push rod is slidably installed inside the air chamber. A limiting plate is provided at the top of the push rod. The limiting plate is located inside the air chamber. A dust-proof cover is provided outside the air chamber.

[0009] Preferably, the sand injection assembly includes a water tank, a partition plate, a sand box, and a funnel. The water tank is fixed on the side wall of the bottom box. The partition plate is slidably connected inside the water tank and is in sealing contact with the inner side wall of the water tank. A limiting column is provided above the partition plate. The limiting column is supported between the top plate of the water tank and the partition plate. The bottom of the water tank is connected to the side wall of the funnel through a pipeline. The funnel is installed on the bottom surface of the sand box. Both the sand box and the funnel are installed inside the side wall of the bottom box.

[0010] Preferably, the wire outlet hole is provided on a wire outlet block. A cutter and a groove block are respectively provided on both sides of the wire outlet hole. The cutter is slidably installed inside the wire outlet block, and the cutting edge of the cutter faces the groove of the groove block. The groove block is fixedly installed inside the wire outlet block. The wire outlet block is fixedly installed inside the side wall of the bottom box.

[0011] Preferably, the top of the rod part of the piston rod is connected to the tail of the cutter. The piston cylinder part of the piston rod is connected to the medicine box through a pipeline.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. When a fire breaks out outside, the gas in the air chamber expands due to the baking of the external flame on the air chamber, driving the gear system to move, causing the rotating housing to rotate and block the heat dissipation fan, preventing the external flame and high-temperature gas from entering the cabinet. Different from the heat dissipation fan structure that is flush with the side of the cabinet in the prior art, because a two-layer spherical housing is adopted, after the relative rotation and sealing of the two, a relatively large space is formed inside, improving the heat insulation effect while also providing space for injecting fine sand in the next step;

[0014] 2. The sand injection assembly in the present invention can inject water and fine sand into the enclosed space composed of the rotating housing and the spherical housing after the rotating housing rotates in place. It can not only absorb a small amount of infiltrated high-temperature gas through the wet fine sand, but also discharge the air in the enclosed space to prevent the gas in the enclosed space from expanding under high temperature, resulting in damage to the rotating housing and the spherical housing;

[0015] 3. The gear system and the sand injection assembly of the present invention can only be activated when an external fire threatens the cabinet, avoiding interference from minor fires and reducing the use cost;

[0016] 4. The cutting knife linked with the rotating housing set in the present invention can actively cut off the circuit in the wire outlet hole and block the wire outlet hole when a fire occurs, preventing the flame from entering the cabinet along the wire outlet hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 is a schematic diagram of the structure of the present invention after removing the cabinet;

[0019] Figure 3 is a schematic diagram of the structure on the side wall of the bottom box;

[0020] Figure 4 is a schematic diagram of the sectional structure and the internal structure on the side wall of the bottom box;

[0021] Figure 5 is a schematic diagram of the sectional view of the air chamber, water chamber, wire outlet block, and the structure of the rotating housing, heat dissipation fan, gear system, and sand injection assembly;

[0022] Figure 6 is Figure 5 an enlarged view of the structure at A inside;

[0023] Figure 7 is a schematic diagram of the rotating housing, heat dissipation fan, and part of the gear system;

[0024] Figure 8 is a schematic diagram of the heat dissipation fan structure;

[0025] Figure 9It is a schematic structural diagram of the sand injection assembly;

[0026] Figure 10 It is a schematic structural diagram after the leakage hole 1 and the leakage hole 2 are aligned after the rotating shell rotates.

[0027] In the figure: 1 - cabinet body; 2 - bottom box; 3 - heat dissipation holes; 4 - gasket;

[0028] 5 - rotating shell; 51 - rotating shaft; 52 - pressing column; 53 - leakage hole 1;

[0029] 6 - radiator fan; 61 - spherical shell; 62 - fan blades; 63 - fixed shaft; 64 - leakage hole 2;

[0030] 7 - gear system; 71 - bevel gear set; 72 - gear; 73 - rack; 74 - push rod; 75 - air chamber; 76 - gear shaft; 77 - limit plate;

[0031] 8 - sand injection assembly; 81 - water tank; 82 - partition board; 83 - sand box; 84 - funnel; 85 - limit post;

[0032] 9 - wire outlet hole; 91 - wire outlet block; 92 - cutting knife; 93 - groove block;

[0033] 10 - piston rod; 11 - medicine bin; 12 - grid plate; 100 - dust cover. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figures 1 to 10, the present invention provides a technical solution: a fire prevention auxiliary device for a computer room, including a cabinet body 1, a bottom box 2, and heat dissipation holes 3 on both sides of the bottom box 2. The bottom box 2 is located at the bottom of the cabinet body 1. A sealing gasket 4 is provided in the heat dissipation hole 3, and the sealing gasket 4 is sealingly connected between the inner side wall of the heat dissipation hole 3 and the outer wall of the rotating housing 5. A heat dissipation fan 6 is provided in the rotating housing 5. The top of the rotating housing 5 is connected to a gear system 7, and the gear system 7 can drive the rotating housing 5 to rotate so that the rotating housing 5 closes the front and rear outlets of the heat dissipation fan 6. A sand injection assembly 8 is further provided on the side of the bottom box 2, and the sand injection assembly 8 can inject fine sand and water into the closed space formed by the rotating housing 5 and the heat dissipation fan 6 after the rotating housing 5 rotates and closes the heat dissipation fan 5. An outlet hole 9 is further provided on the side wall of the bottom box 8, and the side of the outlet hole 9 is connected to a medicine bin 11 through a piston rod 10. The medicine bin 11 is installed at the bottom of the rotating housing 5 and can be activated to push the piston rod 10 to operate by the change in the weight of the rotating housing 5. When a fire breaks out externally, the gear system 7 is started by the high temperature of the flame, and the rotating housing 5 is driven to rotate by the gear system 7 to close the heat dissipation fan 6 and isolate the external fire situation.

[0036] In this embodiment, a grid plate 12 is provided between the cabinet body 1 and the bottom box 2, and the grid plate 12 does not affect the heat dissipation effect of the heat dissipation fan 6 below on the equipment in the cabinet body 1.

[0037] In this embodiment, the rotating housing 5 is a hollow sphere, and the selected material is a fireproof material, such as metal, ceramic, or a material that can be coated with a fireproof coating. The sealing gasket 4 is made of metal, and a layer of rubber and plastic sponge is covered on its inner side surface, so that the rotating housing 5 can move slightly up and down to facilitate applying pressure to the medicine bin 11 below.

[0038] In this embodiment, a rotating shaft 51 is provided at the top of the rotating housing 5. The upper end of the rotating shaft 51 passes through the sealing gasket 4 and extends out and is connected to the gear system 7. A pressing column 52 is provided at the bottom of the rotating housing 5. The pressing column 52 extends downward through the sealing gasket 4 and is rotatably connected inside the side wall of the bottom box 2. A first leakage hole 53 is provided on the rotating housing 5. The rotating shaft 51 is driven to rotate by the gear system 7, and the rotating shaft 51 drives the rotating housing 5 to rotate 90°, blocking the front and rear through holes of the heat dissipation fan 6 to prevent external flames or high-temperature gases from entering the cabinet body 1 through the heat dissipation fan 6.

[0039] In this embodiment, the heat dissipation fan 6 includes a spherical shell 61 and fan blades 62. The fan blades 62 are installed inside the spherical shell 61. Fixed shafts 63 are provided at both the upper and lower ends of the spherical shell 61. The upper and lower fixed shafts 63 respectively pass through the rotating shaft 51 and the pressing column 52 and are fixedly connected inside the side wall of the bottom box 2. Both ends of the rotating housing 5 exceed both ends of the spherical shell 61, and the exceeded length is 1 / 15 - 1 / 18 of the diameter of the spherical shell 61. The exceeded part can help seal the opening of the spherical shell 61. Through the action of the fixed shaft 63, it is ensured that the spherical shell 61 does not rotate together with the rotating housing 5.

[0040] In this embodiment, a second leakage hole 64 is provided on the spherical shell 61. After the rotating housing 5 rotates 90°, the second leakage hole 64 is aligned with and connected to the first leakage hole 53, and both the first leakage hole 53 and the second leakage hole 64 are in the shape of a horn with an opening that becomes larger from bottom to top.

[0041] In this embodiment, the gear system 7 includes a bevel gear set 71, a gear 72, a rack 73, a push rod 74, and an air chamber 75. One end of the bevel gear set 71 is connected to the rotating housing 5, and the other end is installed on a gear shaft 76. The gear shaft 76 is installed inside the side wall of the bottom box 2 through a bracket. The gear 72 is installed on the gear shaft 76. The rack 73 is engaged with the gear 72. The end of the rack 73 is connected to the push rod 74. The head of the push rod 74 is slidably installed inside the air chamber 75. A limiting plate 77 is provided at the top of the push rod 74, and the limiting plate 77 is located inside the air chamber 75. When the air chamber 75 is heated by an external fire, the gas inside it will expand, pushing the push rod 74 to move downward. The push rod 74 pushes the rack 73 to move, driving the gear 72 to rotate. The gear 72 will drive the rotating housing 5 to rotate. Through the limiting plate 77 on the push rod 74, it is ensured that the gear 72 stops rotating after rotating in place, and it is ensured that the rotating housing 5 does not continue to rotate after rotating in place.

[0042] In this embodiment, a dust-proof cover 100 is provided outside the air chamber 75. A pressure relief valve is provided on the air chamber 75 as needed. The materials of the provided air chamber 75 and the dust-proof cover 100 can be made of materials with good heat conduction performance, such as copper.

[0043] In this embodiment, the sand injection assembly 8 includes a water tank 81, a partition plate 82, a sand box 83 and a funnel 84. The water tank 81 is fixed on the side wall of the bottom box 2. The partition plate 82 is slidably connected in the water tank 81 and is in sealing contact with the inner wall of the water tank 81. A limit column 85 is provided above the partition plate 82. The limit column 85 is supported between the top plate of the water tank 81 and the partition plate 82. The bottom of the water tank 81 is connected to the side wall of the funnel 84 through a pipeline. The funnel 84 is installed on the bottom surface of the sand box 83. The sand box 83 and the funnel 84 are both installed in the side wall of the bottom box 2. 0.9 The gas in the water tank 81 is at the upper end and the water is at the lower end. The partition plate 82 is held up by the limit column 85 and will not enter the area with lower air pressure above. Then the water will be pressed by the external atmospheric pressure and will not flow out of the water tank 81. Only when the water tank 81 is heated and the air pressure increases, the partition plate 82 will be pushed downward to press the water into the funnel 84. After the funnel 84 is connected with the leakage hole 1 53 and the leakage hole 2 64 below, the water mixed with fine sand enters the closed space composed of the rotating shell 5 and the spherical shell 61, discharges the air therein, absorbs the high-temperature gas through the moist fine sand, and cools the high-temperature gas through the water.

[0044] In this embodiment, the particle size of the fine sand is selected to be 0.5-1.5 mm. In order to increase the adsorption effect, charcoal powder can be mixed into the fine sand.

[0045] In this embodiment, the outlet hole 9 is arranged on the outlet block 91, and a cutter 92 and a groove block 93 are respectively provided on both sides of the outlet hole 9. The cutter 92 is slidably installed in the outlet block 91 and the blade of the cutter 92 is opposite to the groove of the groove block 93. The groove block 93 is fixedly installed in the outlet block 91. The outlet block 91 is fixedly installed in the side wall of the bottom box 2. The top of the cutter 92 matches the shape of the set groove. When the cutter 92 enters the groove, the outlet hole 9 is blocked.

[0046] In this embodiment, the top end of the rod of the piston rod 10 is connected to the tail end of the cutter 92, and the piston cylinder part of the piston rod 10 is connected to the medicine chamber 11 through a pipeline. The material of the medicine chamber 11 is a relatively high-strength alloy steel. Chemicals such as sodium azide that can produce a large amount of gas or a small explosion when under pressure are placed in the medicine chamber 11. Under the pressure of the rotating shell 5 filled with wet sand from above, a large amount of gas is generated. These gases will push the piston rod 10 with the cutter 92 to cut off the line in the outlet hole 9 and close the outlet hole 9.

[0047] Working principle: In case of a fire, the power supply of the machine room is cut off, and the external flames or high-temperature environment will heat the dust cover 100, the air chamber 75, and the water chamber 81. When the air chamber 75 is heated by an external fire, the gas inside it will expand, pushing the push rod 74 downward. The push rod 74 pushes the rack 73 to move, driving the gear 72 to rotate. The gear 72 will drive the rotating housing 5 to rotate, closing the spherical shell 61. At this time, the second leakage hole 64 is aligned and connected with the first leakage hole 53. After the water chamber 81 is heated, the air pressure increases, and then it will push the partition plate 82 downward to press the water out into the funnel 84. After the funnel 84 is connected with the first leakage hole 53 and the second leakage hole 64 below, it enters the closed space composed of the rotating housing 5 and the spherical shell 61 together with the fine sand, isolating the cabinet body 1 from the outside and preventing the external flame from entering the cabinet body 1 from the radiator fan. When the wet fine sand enters the closed space composed of the rotating housing 5 and the spherical shell 61, the pressure conducted to the medicine bin 11 through the pressing column 52 increases. When it reaches the set value, chemical drugs such as sodium azide that can generate a large amount of gas or a small explosion when pressed are placed in the medicine bin 11. Under the pressure of the rotating housing 5 filled with wet sand above, a large amount of gas is generated. These gases will push the piston rod 10 to drive the cutter 92 to cut off the circuit in the wire outlet hole 9. The top of the cutter 92 is matched with the set groove shape to seal the wire outlet hole 9, preventing the high-temperature gas from entering the cabinet body 1 from here.

[0048] Based on the above, when a fire occurs outside, the invention bakes the air chamber with external flames to make the gas in it expand, driving the gear system to move, making the rotating housing rotate to block the radiator fan, and preventing the external flame and high-temperature gas from entering the cabinet body and damaging the equipment inside; the sand injection assembly in the invention can inject water and fine sand into the closed space composed of the rotating housing and the spherical shell after the rotating housing rotates in place, which can not only absorb a small amount of infiltrated high-temperature gas with the wet fine sand, but also discharge the air in the closed space to prevent the gas in the closed space from expanding at high temperature and causing damage to the rotating housing and the spherical shell; the gear system and the sand injection assembly of the invention can only be started when an external fire threatens the cabinet body, avoiding the interference of minor fires and reducing the use cost; the cutter linked with the rotating housing set in the present invention can actively cut off the circuit in the wire outlet hole and block the wire outlet hole when a fire occurs, preventing the flame from entering the cabinet body along the wire outlet hole.

[0049] As is known by technical common sense, the present invention can be implemented by other embodiments that do not depart from its spiritual essence or essential features. Therefore, the above-disclosed embodiments are illustrative in all aspects and not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are encompassed by the present invention.

Claims

1. A fire prevention auxiliary device for a computer room, characterized in that: It includes a cabinet body (1), a bottom box (2), and heat dissipation holes (3) located on both sides of the bottom box (2). The bottom box (2) is located at the bottom of the cabinet body (1). A sealing gasket (4) is provided in the heat dissipation holes (3). The sealing gasket (4) is sealingly connected between the inner side wall of the heat dissipation hole (3) and the outer wall of the rotating housing (5). A heat dissipation fan (6) is provided in the rotating housing (5). The top of the rotating housing (5) is connected to a gear system (7). The gear system (7) can drive the rotating housing (5) to rotate so that the rotating housing (5) closes the front and rear outlets of the heat dissipation fan (6). A sand injection assembly (8) is also provided on the side of the bottom box (2). The sand injection assembly (8) can inject fine sand and water into the closed space formed by the rotating housing (5) after it rotates and closes the heat dissipation fan (5). An outlet hole (9) is also provided on the side wall of the bottom box (8). The side of the outlet hole (9) is connected to a medicine bin (11) through a piston rod (10). The medicine bin (11) is installed at the bottom of the rotating housing (5) and can be activated by the change in the weight of the rotating housing (5) to push the piston rod (10) to operate.

2. The fire prevention auxiliary equipment for a computer room according to claim 1, characterized in that: A grid plate (12) is provided between the cabinet body (1) and the bottom box (2).

3. An auxiliary fire prevention device for a computer room according to claim 1, characterized in that: The rotating housing (5) is a hollow sphere. A rotating shaft (51) is provided at the top of the rotating housing (5). The upper end of the rotating shaft (51) passes through the sealing gasket (4) and extends out and is connected to the gear system (7). A pressing column (52) is provided at the bottom of the rotating housing (5). The pressing column (52) extends downward through the sealing gasket (4) and is rotatably connected to the side wall inside the bottom box (2). A first leakage hole (53) is provided on the rotating housing (5).

4. The fire prevention auxiliary equipment for a computer room according to claim 3, characterized in that: The heat dissipation fan (6) includes a spherical shell (61) and fan blades (62). The fan blades (62) are installed inside the spherical shell (61). Fixed shafts (63) are provided at both the upper and lower ends of the spherical shell (61). The upper and lower fixed shafts (63) respectively pass through the rotating shaft (51) and the pressing column (52) and are fixedly connected to the side wall inside the bottom box (2). Both ends of the rotating housing (5) exceed both ends of the spherical shell (61). A second leakage hole (64) is provided on the spherical shell (61).

5. An auxiliary fire prevention device for a computer room according to claim 1, characterized in that: The gear system (7) includes a bevel gear set (71), a gear (72), a rack (73), a push rod (74), and an air chamber (75). One end of the bevel gear set (71) is connected to the rotating housing (5), and one end is installed on a gear shaft (76). The gear shaft (76) is installed in the side wall of the bottom box (2) through a bracket. The gear (72) is installed on the gear shaft (76). The gear (72) meshes with the rack (73). The end of the rack (73) is connected to the push rod (74). The head of the push rod (74) is slidably installed in the air chamber (75). A limiting plate (77) is provided at the top of the push rod (74). The limiting plate (77) is located inside the air chamber (75). A dust-proof cover (100) is provided outside the air chamber (75).

6. The fire prevention auxiliary equipment for a computer room according to claim 1, characterized in that: The sand injection assembly (8) includes a water sump (81), a partition plate (82), a sand box (83), and a funnel (84). The water sump (81) is fixed on the side wall of the bottom box (2). The partition plate (82) is slidably connected in the water sump (81) and is in sealed contact with the inner side wall of the water sump (81). A limit post (85) is provided above the partition plate (82), and the limit post (85) is supported between the top plate of the water sump (81) and the partition plate (82). The bottom of the water sump (81) is connected to the side wall of the funnel (84) through a pipeline. The funnel (84) is installed on the bottom surface of the sand box (83). Both the sand box (83) and the funnel (84) are installed in the side wall of the bottom box (2).

7. An auxiliary fire prevention device for a computer room according to claim 1, characterized in that: The wire outlet hole (9) is provided on the wire outlet block (91). A cutter (92) and a groove block (93) are respectively provided on both sides of the wire outlet hole (9). The cutter (92) is slidably installed in the wire outlet block (91), and the cutting edge of the cutter (92) faces the groove of the groove block (93). The groove block (93) is fixedly installed in the wire outlet block (91). The wire outlet block (91) is fixedly installed in the side wall of the bottom box (2).

8. The fire prevention auxiliary equipment for a computer room according to claim 7, characterized in that: The top end of the rod part of the piston rod (10) is connected to the tail of the cutter (92). The piston cylinder part of the piston rod (10) is connected to the medicine bin (11) through a pipeline.

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