Short-cut denitrification-anaerobic ammonia oxidation toilet black water treatment device

Abstract

The utility model relates to the technical field of black water treatment, in particular to a short-cut denitrification-anaerobic ammonia oxidation toilet black water treatment device which is convenient for treating grease in black water and preventing the grease from blocking and corroding subsequent treatment equipment. Comprising a body mechanism; the device further comprises an aeration mechanism, a position adjusting mechanism, an oil pumping mechanism, an alarm mechanism and a depth adjusting mechanism, the aeration mechanism is connected with the main body mechanism, the position adjusting mechanism is installed on the aeration mechanism, the oil pumping mechanism is installed on the position adjusting mechanism, the alarm mechanism is installed on the oil pumping mechanism, and the depth adjusting mechanism is installed on the oil pumping mechanism. The main body mechanism is used for carrying out short-range denitrification and anaerobic ammonia oxidation treatment on black water, the aeration mechanism is used for carrying out preliminary aeration treatment on sewage, the oil pumping mechanism is used for treating separated grease, and the position adjusting mechanism is used for adjusting the oil collecting position of the oil pumping mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of black water treatment, in particular to a short-range denitrification-anaerobic ammonia oxidation toilet black water treatment device. Background Art

[0002] To address water pollution and water resource shortages caused by excessive nitrogen discharge, my country is continuously raising emission standards for municipal wastewater treatment plants. Existing wastewater treatment plants in my country mostly use traditional anoxic nitrogen removal (A / O) processes, which suffer from high aeration energy consumption, the need for an external carbon source, difficulties meeting effluent quality standards, and high sludge production.

[0003] Existing blackwater treatment technologies, such as those disclosed in application number CN202111342255.2, include a water storage tank, an aerobic activated sludge reactor, a secondary sedimentation tank, a SBR reactor, and a control device. The untreated sewage in the water storage tank enters the aerobic activated sludge reactor through the first water storage tank outlet pipe, with a total flow rate of Q1. The untreated sewage in the water storage tank enters the SBR reactor through the second SBR inlet pipe, with a flow rate of Q2; Q1:Q2 ≤ 1:1. The untreated sewage at a flow rate of Q1 undergoes nitrification, producing nitrate nitrogen, which then enters the SBR reactor and reacts with oxygen-consuming substances. To ensure partial denitrification of the nitrate nitrogen, the ratio of Q1 to Q2 must be controlled.

[0004] However, toilet black water contains grease, which can cause blockage and corrosion of subsequent processing equipment. The existing technology is not convenient for pre-treating the grease, which reduces its practicality. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a short-range denitrification-anaerobic ammonia oxidation toilet black water treatment device which is convenient for treating grease in black water and prevents grease from clogging and corroding subsequent treatment equipment.

[0006] The utility model discloses a short-range denitrification-anaerobic ammonia oxidation toilet black water treatment device, comprising a main body mechanism; further comprising an aeration mechanism, a position adjustment mechanism, an oil pumping mechanism, an alarm mechanism and a depth adjustment mechanism, wherein the aeration mechanism is connected to the main body mechanism, the position adjustment mechanism is mounted on the aeration mechanism, the oil pumping mechanism is mounted on the position adjustment mechanism, the alarm mechanism is mounted on the oil pumping mechanism, and the depth adjustment mechanism is mounted on the oil pumping mechanism; the black water is subjected to short-range denitrification and anaerobic ammonia oxidation treatment through the main body mechanism, the sewage is subjected to preliminary aeration treatment through the aeration mechanism, the oil pumping mechanism treats the separated grease, the position adjustment mechanism adjusts the oil collecting position of the oil pumping mechanism, and the alarm mechanism is mounted on the depth adjustment mechanism. The mechanism detects the amount of oil collected in the oil pumping mechanism, and the depth adjustment mechanism adjusts the depth of oil pumping by the oil pumping mechanism; the black water is subjected to short-range denitrification and anaerobic ammonia oxidation treatment through the main mechanism, and the sewage is preliminarily aerated through the aeration mechanism, and the grease in the black water is preliminarily separated to prevent the grease from affecting the normal operation of the main mechanism, thereby improving practicality; the oil pumping mechanism processes the separated grease, and the position adjustment mechanism adjusts the position of the oil pumping mechanism for collecting oil. The alarm mechanism detects the amount of oil collected in the oil pumping mechanism, and promptly reminds the operator to come and deal with it when cleaning is required, thereby improving practicality; the depth adjustment mechanism adjusts the depth of oil pumping by the oil pumping mechanism.

[0007] Preferably, the main structure includes a short-cut denitrification tank and an anaerobic oxidation reactor, and the anaerobic oxidation reactor is connected to the short-cut denitrification tank through a pipeline; the black water is subjected to short-cut denitrification treatment by the short-cut denitrification tank, and then the sewage enters the anaerobic oxidation reactor for anaerobic ammonia oxidation treatment, thereby improving the treatment quality of the black water.

[0008] Preferably, the aeration mechanism includes a sewage tank, an air inlet pipe, an aeration pipe, an aeration head and an air inlet pump. The sewage tank is connected to the short-range denitrification tank through a pipeline. The air inlet pipe is installed on the inner wall of the sewage tank, the aeration pipe is installed on the air inlet pipe, the aeration head is installed on the aeration pipe, and the air inlet pump is installed on the outer wall of the sewage tank. The air outlet end of the air inlet pump is connected to the air inlet pipe. When the sewage enters the sewage tank, the air is blown into the sewage from the aeration head through the air inlet pipe and the aeration pipe by turning on the air inlet pump, thereby improving the efficiency of water separation in the black water. After that, the sewage enters the short-range denitrification tank to carry out short-range denitrification treatment of the black water. After that, the sewage enters the anaerobic oxidation reactor to carry out anaerobic ammonia oxidation treatment, thereby improving the treatment quality of the black water.

[0009] Preferably, the position adjustment mechanism includes a first lead screw, a guide rod, a sliding box and a first motor. The first lead screw is rotatably mounted on the side wall of the sewage tank, the guide rod is mounted on the sewage tank, the sliding box is slidably mounted on the first lead screw, the sliding box is threadedly engaged with the guide rod, the first motor is mounted on the outer wall of the sewage tank, and the output end of the first motor is connected to the guide rod; by turning on the first motor to drive the guide rod to rotate, the sliding box is driven to slide on the first lead screw through the threaded relationship, thereby adjusting the position of the oil pumping mechanism.

[0010] Preferably, the oil extraction mechanism includes an oil suction hood, a sliding rod, an oil suction box, a suction fan and a mounting nozzle, the sliding rod is slidably installed on the sliding box, the oil suction hood is installed at the bottom end of the oil suction hood, the oil suction box is installed on the outer wall of the sewage tank, the oil suction box is provided with a sewage outlet, the suction fan is installed on the outer wall of the oil suction box, the mounting nozzle is installed on the oil suction box, an oil extraction connecting pipe is provided on the oil suction hood, and the oil extraction connecting pipe on the oil suction hood is connected to the mounting nozzle through an oil guide hose; by turning on the suction fan, a negative pressure is formed in the oil suction box, and then the oil in the sewage tank is sucked into the oil guide hose through the oil suction hood, and then enters the oil suction box for collection.

[0011] Preferably, the alarm mechanism includes a connecting pipe, a buoyancy plate and a proximity switch. The connecting pipe is installed on the side wall of the oil suction box, the connecting pipe is connected to the oil suction box, the buoyancy plate is installed in the connecting pipe by sliding through buoyancy, the proximity switch is installed on the inner top of the connecting pipe, and a buzzer is provided on the outer wall of the oil suction box; when the amount of oil in the oil suction box increases, the oil level rises, and then the buoyancy plate is driven to slide upward in the connecting pipe by buoyancy until the buoyancy plate is close to the proximity switch, and the proximity switch controls the buzzer alarm to remind the operator to clean it in time.

[0012] The two ends of the second guide rail are respectively arranged on the track of the second motor and the track of the second motor, and the track of the second motor is connected with the track of the second motor washer, and the track of the second motor is connected with the track of the second motor.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the black water is subjected to short-range denitrification and anaerobic ammonia oxidation treatment through the main body mechanism, the sewage is subjected to preliminary aeration treatment through the aeration mechanism, the grease in the black water is preliminarily separated, and the grease is prevented from affecting the normal operation of the main body mechanism, thereby improving practicality; the oil pumping mechanism processes the separated grease; the position adjustment mechanism adjusts the position of the oil pumping mechanism for collecting oil; the alarm mechanism detects the amount of oil collected in the oil pumping mechanism, and promptly reminds the operator to come and deal with it when cleaning is required, thereby improving practicality; the depth adjustment mechanism adjusts the depth of oil pumping by the oil pumping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a first axonometric structural diagram of the present invention;

[0015] Figure 2 This is a second axonometric structural diagram of the present invention;

[0016] Figure 3 This is a third axonometric structural diagram of the present utility model;

[0017] Figure 4 This is a fourth axonometric structural diagram of the present utility model;

[0018] Figure 5 It is a schematic diagram of the side-view cross-section axonometric structure of the utility model;

[0019] Figure 6 This is a front-view cross-sectional axonometric structural diagram of the present invention;

[0020] Markings in the accompanying drawings: 01, main body; 11, short-range denitrification tank; 12, anaerobic oxidation reactor; 02, aeration mechanism; 21, sewage tank; 22, air inlet pipe; 23, aeration pipe; 24, aeration head; 25, air intake pump; 03, position adjustment mechanism; 31, first screw; 32, guide rod; 33, sliding box; 34, first motor; 04, oil extraction mechanism; 41, oil suction hood; 42, sliding rod; 43, oil suction box; 44, suction fan; 45, mounting nozzle; 05, alarm mechanism; 51, connecting pipe; 52, buoyancy plate; 53, proximity switch; 06, depth adjustment mechanism; 61, second screw; 62, guide sliding rod; 63, slider; 64, mounting plate; 65, connecting rod; 66, second motor. DETAILED DESCRIPTION

[0021] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention. Example 1

[0022] like Figure 4 and Figure 6 As shown, a short-range denitrification-anaerobic ammonium oxidation toilet black water treatment device includes a main body 01, an aeration mechanism 02, a position adjustment mechanism 03, an oil pumping mechanism 04, an alarm mechanism 05, and a depth adjustment mechanism 06. The aeration mechanism 02 is connected to the main body 01, the position adjustment mechanism 03 is installed on the aeration mechanism 02, the oil pumping mechanism 04 is installed on the position adjustment mechanism 03, the alarm mechanism 05 is installed on the oil pumping mechanism 04, and the depth adjustment mechanism 06 is installed on the oil pumping mechanism 04.

[0023] The main body 01 performs short-range denitrification and anaerobic ammonium oxidation treatment on the black water, the aeration mechanism 02 performs preliminary aeration treatment on the sewage, the oil pumping mechanism 04 processes the separated oil, the position adjustment mechanism 03 adjusts the oil collection position of the oil pumping mechanism 04, the alarm mechanism 05 detects the amount of oil collected in the oil pumping mechanism 04, and the depth adjustment mechanism 06 adjusts the depth of oil pumping by the oil pumping mechanism 04;

[0024] The main structure 01 includes a short-cut denitrification tank 11 and an anaerobic oxidation reactor 12. The anaerobic oxidation reactor 12 is connected to the short-cut denitrification tank 11 through a pipeline.

[0025] The aeration mechanism 02 includes a sewage tank 21, an air inlet pipe 22, an aeration pipe 23, an aeration head 24 and an air inlet pump 25. The sewage tank 21 is connected to the short-range denitrification tank 11 through a pipeline. The air inlet pipe 22 is installed on the inner wall of the sewage tank 21, the aeration pipe 23 is installed on the air inlet pipe 22, the aeration head 24 is installed on the aeration pipe 23, and the air inlet pump 25 is installed on the outer wall of the sewage tank 21. The air outlet end of the air inlet pump 25 is connected to the air inlet pipe 22;

[0026] When the sewage enters the sewage tank 21, the air intake pump 25 is turned on to blow air into the sewage through the air intake pipe 22 and the aeration pipe 23 and then from the aeration head 24, thereby improving the efficiency of water separation in the black water. The sewage then enters the short-range denitrification tank 11 to carry out short-range denitrification treatment on the black water. The sewage then enters the anaerobic oxidation reactor 12 to carry out anaerobic ammonia oxidation treatment to improve the treatment quality of the black water. The oil pumping mechanism 04 processes the separated oil and grease, the position adjustment mechanism 03 adjusts the oil collection position of the oil pumping mechanism 04, and the alarm mechanism 05 detects the amount of oil collected in the oil pumping mechanism 04. When cleaning is required, the operator is promptly reminded to come for processing, thereby improving practicality. The depth adjustment mechanism 06 adjusts the depth of oil extraction by the oil pumping mechanism 04. Example 2

[0027] like Figures 1 to 6As shown, a short-range denitrification-anaerobic ammonium oxidation toilet black water treatment device includes a main body 01, an aeration mechanism 02, a position adjustment mechanism 03, an oil pumping mechanism 04, an alarm mechanism 05, and a depth adjustment mechanism 06. The aeration mechanism 02 is connected to the main body 01, the position adjustment mechanism 03 is installed on the aeration mechanism 02, the oil pumping mechanism 04 is installed on the position adjustment mechanism 03, the alarm mechanism 05 is installed on the oil pumping mechanism 04, and the depth adjustment mechanism 06 is installed on the oil pumping mechanism 04.

[0028] The main body 01 performs short-range denitrification and anaerobic ammonium oxidation treatment on the black water, the aeration mechanism 02 performs preliminary aeration treatment on the sewage, the oil pumping mechanism 04 processes the separated oil, the position adjustment mechanism 03 adjusts the oil collection position of the oil pumping mechanism 04, the alarm mechanism 05 detects the amount of oil collected in the oil pumping mechanism 04, and the depth adjustment mechanism 06 adjusts the depth of oil pumping by the oil pumping mechanism 04;

[0029] The position adjustment mechanism 03 includes a first lead screw 31, a guide rod 32, a sliding box 33, and a first motor 34. The first lead screw 31 is rotatably mounted on the side wall of the sewage tank 21, the guide rod 32 is mounted on the sewage tank 21, and the sliding box 33 is slidably mounted on the first lead screw 31. The sliding box 33 and the guide rod 32 are threadedly engaged. The first motor 34 is mounted on the outer wall of the sewage tank 21, and the output end of the first motor 34 is connected to the guide rod 32.

[0030] The oil extraction mechanism 04 includes an oil suction hood 41, a sliding rod 42, an oil suction box 43, a suction fan 44 and a mounting nozzle 45. The sliding rod 42 is slidably mounted on the sliding box 33. The oil suction hood 41 is mounted on the bottom end of the oil suction hood 41. The oil suction box 43 is mounted on the outer wall of the sewage tank 21. The oil suction box 43 is provided with a sewage outlet. The suction fan 44 is mounted on the outer wall of the oil suction box 43. The mounting nozzle 45 is mounted on the oil suction box 43. The oil suction hood 41 is provided with an oil extraction connecting pipe. The oil extraction connecting pipe on the oil suction hood 41 is connected to the mounting nozzle 45 through an oil guide hose.

[0031] The alarm mechanism 05 includes a connecting pipe 51, a buoyancy plate 52, and a proximity switch 53. The connecting pipe 51 is installed on the side wall of the oil suction box 43 and is connected to the oil suction box 43. The buoyancy plate 52 is installed in the connecting pipe 51 by sliding due to buoyancy. The proximity switch 53 is installed at the top end of the connecting pipe 51. A buzzer is provided on the outer wall of the oil suction box 43.

[0032] The depth adjustment mechanism 06 includes a second lead screw 61, a guide sliding rod 62, two sliders 63, a mounting plate 64, two connecting rods 65 and a second motor 66. An adjusting slot is provided on the sliding box 33. The second lead screw 61 is rotatably mounted on the inner wall of the adjusting slot, the guide sliding rod 62 is mounted in the adjusting slot, the two sliders 63 are slidably mounted in the adjusting slot, the two sliders 63 are threadedly engaged with the second lead screw 61, the mounting plate 64 is mounted on the top end of the sliding rod 42, one end of the two connecting rods 65 is rotatably mounted on the mounting plate 64, and the other end of the two connecting rods 65 is rotatably mounted on the two sliders 63. The second motor 66 is mounted on the outer wall of the sliding box 33, and the output end of the second motor 66 is connected to the second lead screw 61. The thread directions at both ends of the second lead screw 61 are opposite;

[0033] By turning on the first motor 34, the guide rod 32 is driven to rotate, and then the sliding box 33 is driven to slide on the first screw 31 through the threaded relationship, thereby adjusting the oil extraction position of the oil pumping mechanism 04, and by turning on the suction fan 44, a negative pressure is formed in the oil suction box 43, and then the oil in the sewage tank 21 is sucked into the oil guide hose through the oil suction hood 41, and then enters the oil suction box 43 for collection. When the oil amount in the oil suction box 43 increases, the oil level rises, and then the buoyancy force drives the buoyancy plate 52 to slide upward in the connecting pipe 51 until the buoyancy plate 52 approaches the proximity switch 53. The proximity switch 53 controls the buzzer alarm to remind the operator to clean it in time, and by turning on the second motor 66, the second screw 61 is driven to rotate, and then the two are driven to slide relative to each other in the adjustment slide groove of the sliding box 33 through the threaded relationship, thereby driving the sliding rod 42 to slide on the sliding box 33, thereby adjusting the height of the oil suction hood 41, thereby adjusting the depth of oil suction, thereby improving practicality.

[0034] like Figures 1 to 6As shown, the utility model is a short-range denitrification-anaerobic ammonia oxidation toilet black water treatment device. When it is working, after the sewage enters the sewage tank 21, the air is blown into the sewage from the aeration head 24 through the air intake pump 25 through the air intake pipe 22 and the aeration pipe 23, thereby improving the efficiency of water separation in the black water. Then the sewage enters the short-range denitrification tank 11 to perform short-range denitrification treatment on the black water, and then the sewage enters the anaerobic oxidation reactor 12 to perform anaerobic ammonia oxidation treatment, thereby improving the treatment quality of the black water. By turning on the first motor 34 to drive the guide rod 32 to rotate, the sliding box 33 is driven to slide on the first screw 31 through the threaded relationship, and then the oil extraction position of the oil extraction mechanism 04 is adjusted. By turning on the suction fan 44, This creates a negative pressure in the oil suction box 43, and then the oil in the sewage tank 21 is sucked into the oil guide hose through the oil suction hood 41, and then enters the oil suction box 43 for collection. When the amount of oil in the oil suction box 43 increases, the oil level rises, and then the buoyancy drives the buoyancy plate 52 to slide upward in the connecting pipe 51 until the buoyancy plate 52 is close to the proximity switch 53. The proximity switch 53 controls the buzzer alarm to remind the operator to clean it in time, and turns on the second motor 66 to drive the second screw 61 to rotate, and then drives the two to slide relative to each other in the adjustment slide groove of the sliding box 33 through the threaded relationship, and then drives the sliding rod 42 to slide on the sliding box 33, thereby adjusting the height of the oil suction hood 41, and thus adjusting the depth of oil suction, thereby improving practicality.

[0035] The short-range denitrification tank 11, anaerobic oxidation reactor 12, air intake pump 25, first motor 34, suction fan 44, proximity switch 53 and second motor 66 of the utility model are purchased on the market. Technicians in this industry only need to install and operate them according to the accompanying instruction manuals, without the need for creative work by technicians in this field.

[0036] The main function achieved by the utility model is to facilitate the treatment of grease in black water during the black water treatment process, and prevent the grease from clogging and corroding subsequent treatment equipment.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A short-range denitrification-anaerobic ammonium oxidation toilet black water treatment device, comprising a main body (01); characterized in that: The apparatus further comprises an aeration mechanism (02), a position adjustment mechanism (03), an oil pumping mechanism (04), an alarm mechanism (05) and a depth adjustment mechanism (06); the aeration mechanism (02) is connected to the main mechanism (01); the position adjustment mechanism (03) is mounted on the aeration mechanism (02); the oil pumping mechanism (04) is mounted on the position adjustment mechanism (03); the alarm mechanism (05) is mounted on the oil pumping mechanism (04); and the depth adjustment mechanism (06) is mounted on the oil pumping mechanism (04); The main body mechanism (01) performs short-range denitrification and anaerobic ammonia oxidation treatment on black water, performs preliminary aeration treatment on sewage through the aeration mechanism (02), the oil extraction mechanism (04) processes the separated oil, the position adjustment mechanism (03) adjusts the position of the oil extraction mechanism (04) collecting oil, the alarm mechanism (05) detects the amount of oil collected in the oil extraction mechanism (04), and the depth adjustment mechanism (06) adjusts the depth of oil extraction by the oil extraction mechanism (04).

2. A short-cut denitrification-anaerobic ammonium oxidation toilet black water treatment device according to claim 1, characterized in that: The main structure (01) includes a short-cut denitrification tank (11) and an anaerobic oxidation reactor (12), and the anaerobic oxidation reactor (12) is connected to the short-cut denitrification tank (11) through a pipeline.

3. A short-cut denitrification-anaerobic ammonium oxidation toilet black water treatment device as claimed in claim 2, characterized in that: The aeration mechanism (02) includes a sewage tank (21), an air inlet pipe (22), an aeration pipe (23), an aeration head (24) and an air inlet pump (25). The sewage tank (21) is connected to the short-range denitrification tank (11) through a pipeline. The air inlet pipe (22) is installed on the inner wall of the sewage tank (21), the aeration pipe (23) is installed on the air inlet pipe (22), the aeration head (24) is installed on the aeration pipe (23), and the air inlet pump (25) is installed on the outer wall of the sewage tank (21). The air outlet end of the air inlet pump (25) is connected to the air inlet pipe (22).

4. A short-cut denitrification-anaerobic ammonium oxidation toilet black water treatment device as claimed in claim 3, characterized in that: The position adjustment mechanism (03) includes a first lead screw (31), a guide rod (32), a sliding box (33) and a first motor (34). The first lead screw (31) is rotatably mounted on the side wall of the sewage tank (21). The guide rod (32) is mounted on the sewage tank (21). The sliding box (33) is slidably mounted on the first lead screw (31). The sliding box (33) is threadedly engaged with the guide rod (32). The first motor (34) is mounted on the outer wall of the sewage tank (21). The output end of the first motor (34) is connected to the guide rod (32).

5. A short-cut denitrification-anaerobic ammonium oxidation toilet black water treatment device as claimed in claim 4, characterized in that: The oil extraction mechanism (04) includes an oil suction hood (41), a sliding rod (42), an oil suction box (43), a suction fan (44) and a mounting nozzle (45), wherein the sliding rod (42) is slidably mounted on the sliding box (33), the oil suction hood (41) is mounted on the bottom end of the oil suction hood (41), the oil suction box (43) is mounted on the outer wall of the sewage tank (21), a sewage outlet is provided on the oil suction box (43), the suction fan (44) is mounted on the outer wall of the oil suction box (43), the mounting nozzle (45) is mounted on the oil suction box (43), an oil extraction connecting pipe is provided on the oil suction hood (41), and the oil extraction connecting pipe on the oil suction hood (41) is connected to the mounting nozzle (45) through an oil guide hose.

6. A short-cut denitrification-anaerobic ammonium oxidation toilet black water treatment device as claimed in claim 5, characterized in that: The alarm mechanism (05) includes a connecting pipe (51), a buoyancy plate (52) and a proximity switch (53). The connecting pipe (51) is installed on the side wall of the oil suction box (43). The connecting pipe (51) is connected to the oil suction box (43). The buoyancy plate (52) is installed in the connecting pipe (51) by sliding through buoyancy. The proximity switch (53) is installed at the inner top end of the connecting pipe (51). A buzzer is provided on the outer wall of the oil suction box (43).

7. A short-cut denitrification-anaerobic ammonium oxidation toilet black water treatment device as claimed in claim 6, characterized in that: The depth adjustment mechanism (06) includes a second lead screw (61), a guide sliding rod (62), two sliders (63), a mounting plate (64), two connecting rods (65) and a second motor (66). An adjustment slot is provided on the sliding box (33). The second lead screw (61) is rotatably mounted on the inner wall of the adjustment slot. The guide sliding rod (62) is mounted in the adjustment slot. The two sliders (63) are slidably mounted in the adjustment slot. The two sliders (63) are threadedly engaged with the second lead screw (61). The mounting plate (64) is mounted on the top of the sliding rod (42). One end of the two connecting rods (65) is rotatably mounted on the mounting plate (64). The other ends of the two connecting rods (65) are rotatably mounted on the two sliders (63). The second motor (66) is mounted on the outer wall of the sliding box (33). The output end of the second motor (66) is connected to the second lead screw (61). The thread directions of the two ends of the second lead screw (61) are opposite.

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