阅读说明：本技术 淡水养殖淤泥脱水一体化设备和淤泥脱水方法 (Freshwater aquaculture sludge dewatering integrated equipment and sludge dewatering method ) 是由 王磊 韩松元 李璟 王元麒 于 2019-12-06 设计创作，主要内容包括：本发明公开了淡水养殖淤泥脱水一体化设备和淤泥脱水方法,属于淡水养殖淤泥脱水技术领域,淡水养殖淤泥脱水一体化设备,包括淡水养殖鱼塘和污泥泵,污泥泵的抽泥口与淡水养殖鱼塘的出口之间固定有第一管道,污泥泵的排泥口固定有第二管道,第二管道的连接有淤泥箱,且第二管道插接于淤泥箱内；淤泥箱上设置有淤泥搅拌机构；淤泥箱的出口固定有第九管道,第九管道的另一端连接有淤泥螺杆泵,且第九管道与淤泥螺杆泵的抽泥口固定,淤泥螺杆泵的排泥口固定有第十三管道；第十三管道上固定有第十四管道,解决了现有的技术运行成本高、处理效率低、设备脱水后淤泥水含量高、设备处理后的漂浮物去除率效果很低等问题。(The invention discloses freshwater aquaculture sludge dewatering integrated equipment and a sludge dewatering method, belonging to the technical field of freshwater aquaculture sludge dewatering, and the freshwater aquaculture sludge dewatering integrated equipment comprises a freshwater aquaculture fishpond and a sludge pump, wherein a first pipeline is fixed between a sludge pumping port of the sludge pump and an outlet of the freshwater aquaculture fishpond, a sludge discharging port of the sludge pump is fixed with a second pipeline, the second pipeline is connected with a sludge box, and the second pipeline is inserted into the sludge box; a sludge stirring mechanism is arranged on the sludge tank; a ninth pipeline is fixed at the outlet of the sludge tank, the other end of the ninth pipeline is connected with a sludge screw pump, the ninth pipeline is fixed with a sludge pumping port of the sludge screw pump, and a thirteenth pipeline is fixed at a sludge discharge port of the sludge screw pump; the thirteenth pipeline is fixed with the fourteenth pipeline, so that the problems that the prior art is high in running cost, low in treatment efficiency, high in sludge water content after equipment dehydration, low in floating object removal rate effect after equipment treatment and the like are solved.)

1. Freshwater aquaculture sludge dewatering integrated equipment comprises a freshwater aquaculture fish pond (1) and a sludge pump (2), and is characterized in that a first pipeline (201) is fixed between a sludge pumping port of the sludge pump (2) and an outlet of the freshwater aquaculture fish pond (1), a second pipeline (202) is fixed at a sludge discharging port of the sludge pump (2), a sludge box (4) is connected to the second pipeline (202), and the second pipeline (202) is inserted into the sludge box (4);

a sludge stirring mechanism (3) is arranged on the sludge tank (4);

a ninth pipeline (161) is fixed at the outlet of the sludge tank (4), the other end of the ninth pipeline (161) is connected with a sludge screw pump (16), the ninth pipeline (161) is fixed with a sludge pumping port of the sludge screw pump (16), and a thirteenth pipeline (162) is fixed at a sludge discharge port of the sludge screw pump (16);

a fourteenth pipeline (163) is fixed on the thirteenth pipeline (162), the other end of the fourteenth pipeline (163) is connected with a coagulated PAC screw pump (18), and the fourteenth pipeline (163) is fixed with a water outlet of the coagulated PAC screw pump (18);

a twelfth pipeline (1501) is fixed at a water pumping port of the coagulation PAC screw pump (18), the other end of the twelfth pipeline (1501) is connected with a coagulation PAC box (15), the twelfth pipeline (1501) is fixed with an outlet of the coagulation PAC box (15), a coagulation PAC stirring mechanism (13) is arranged on the coagulation PAC box (15), a coagulation PAC dosing mechanism (12) is fixed at the upper end of the coagulation PAC box (15), and a first valve is installed on the coagulation PAC dosing mechanism (12);

a fifteenth pipeline (164) is fixed on the thirteenth pipeline (162), the other end of the fifteenth pipeline (164) is connected with a flocculation PAM screw pump (20), and the fifteenth pipeline (164) is fixed with a water outlet of the flocculation PAM screw pump (20);

a sixth pipeline (604) is fixed at a water pumping port of the flocculation PAM screw pump (20), a third pipeline (601), a fourth pipeline (602) and a fifth pipeline (603) are fixed on the sixth pipeline (604), the other ends of the third pipeline (601), the fourth pipeline (602) and the fifth pipeline (603) are connected with a flocculation PAM box (6), the third pipeline (601), the fourth pipeline (602) and the fifth pipeline (603) are fixed with an outlet of the flocculation PAM box (6), three groups of flocculation PAM stirring mechanisms (10) are arranged on the flocculation PAM box (6), a flocculation PAM dosing mechanism (7) is fixed at the right part of the upper end of the flocculation PAM box (6), and a second valve is arranged on the flocculation PAM dosing mechanism (7);

an eleventh pipeline (903) and a ninth pipeline (902) are respectively inserted into the coagulation PAC box (15) and the flocculation PAM box (6), the ninth pipeline (902) and the eleventh pipeline (903) are integrated into one outlet to be fixed with an eighth pipeline (901), the other end of the eighth pipeline (901) is connected with a tap water pump (9), the eighth pipeline (901) is fixed with a water outlet of the tap water pump (9), and a seventh pipeline (8) is fixed at a water pumping port of the tap water pump (9);

the other end of the thirteenth pipeline (162) is connected with a horizontal spiral centrifuge (22) through a horizontal spiral centrifuge sludge inlet (24), and a horizontal spiral centrifuge water outlet (25) and a horizontal spiral centrifuge sludge discharge port (26) are formed in the horizontal spiral centrifuge (22).

2. The integrated freshwater aquaculture sludge dewatering plant according to claim 1, wherein a sludge front end grid is fixed at the outlet of the freshwater aquaculture pond (1).

3. The integrated equipment for sludge dewatering in freshwater aquaculture according to claim 1, wherein the sludge stirring mechanism (3) comprises a first motor (31), a first stirring shaft (32) and a first stirring blade (33), the first motor (31) is fixed at the upper end of the sludge tank (4), the output end of the first motor (31) penetrates through the sludge tank (4), the first stirring shaft (32) is fixed at the output end of the first motor (31), the first stirring blade (33) is provided in plurality, and the first stirring blades (33) are uniformly fixed on the circumferential surface of the first stirring shaft (32).

4. The integrated equipment for dewatering freshwater aquaculture sludge according to claim 3, wherein a sludge tank liquid level sensor (5) is fixed in the sludge tank (4).

5. The integrated equipment for dewatering freshwater aquaculture sludge according to claim 1, wherein the coagulation PAC stirring mechanism (13) comprises a third motor (131), a third stirring shaft (132) and a third stirring blade (133), the third motor (131) is fixed at the upper end of the coagulation PAC box (15), the output end of the third motor (131) penetrates through the coagulation PAC box (15), the third stirring shaft (132) is fixed at the output end of the third motor (131), the third stirring blade (133) is provided with a plurality of stirring blades, and the third stirring blade (133) is uniformly fixed on the circumferential surface of the third stirring shaft (132).

6. The integrated freshwater aquaculture sludge dewatering apparatus of claim 5, wherein a coagulation PAC tank level sensor (14) is fixed in the coagulation PAC tank (15).

7. The integrated equipment for dewatering freshwater aquaculture sludge according to claim 1, wherein each group of the flocculation PAM stirring mechanisms (10) comprises a second motor (101), a second stirring shaft (102) and a second stirring blade (103), the second motor (101) is fixed at the upper end of the flocculation PAM box (6), the output end of the second motor (101) penetrates through the flocculation PAM box (6), the second stirring shaft (102) is fixed at the output end of the second motor (101), a plurality of second stirring blades (103) are arranged in each group, and the second stirring blades (103) are uniformly fixed on the circumferential surface of the second stirring shaft (102).

8. The integrated dewatering installation for freshwater aquaculture sludge of claim 7, wherein a flocculation PAM tank level sensor (11) is fixed in the flocculation PAM tank (6).

9. The integrated equipment for dewatering sludge in freshwater aquaculture according to claim 1, wherein the horizontal screw centrifuge (22) comprises a base (221), a base (222), screw conveying blades (223), a fourth motor (224), a screw conveying shaft (225) and a conveying cylinder (226), the base (222) is provided with four bases (222), the four bases (222) are respectively fixed at four corners of the lower end of the base (221), the conveying cylinder (226) is fixed at the upper end of the base (221), the fourth motor (224) is fixed at the left end of the conveying cylinder (226), the output end of the fourth motor (224) penetrates through the conveying cylinder (226), the screw conveying shaft (225) is fixed at the output end of the fourth motor (224), the screw conveying blades (223) are fixed on the circumferential surface of the screw conveying shaft (225), and a sludge discharge port (26) of the horizontal screw centrifuge is fixed at the lower end of the conveying cylinder (226), and the lower extreme that horizontal screw centrifuge row silt mouth (26) run through runs through conveying cylinder (226) and base (221) in proper order, be fixed with the filter screen between the inner wall of horizontal screw centrifuge row silt mouth (26), and the upper end of filter screen keeps the same level with the lower inner wall of conveying cylinder (226), horizontal screw centrifuge outlet (25) are fixed in the lower extreme of conveying cylinder (226), and the lower extreme of horizontal screw centrifuge outlet (25) runs through conveying cylinder (226) and base (221) in proper order.

10. The integrated equipment for dewatering freshwater aquaculture sludge according to any one of claims 1-9, wherein a sludge flow meter (17) is installed on the thirteenth pipeline (162), and the sludge flow meter (17) is positioned between a sludge screw pump (16) and the fourteenth pipeline (163);

a horizontal spiral centrifuge flowmeter (23) is mounted on the thirteenth pipeline (162), and the horizontal spiral centrifuge flowmeter (23) is positioned between the fifteenth pipeline (164) and the horizontal spiral centrifuge (22);

a coagulation PAC flowmeter (19) is arranged on the fourteenth pipeline (163);

and a flocculation PAM flow meter (21) is arranged on the fifteenth pipeline (164).

11. The method for sludge dewatering by using the integrated equipment for sludge dewatering in freshwater aquaculture according to claim 10, and is characterized by comprising the following steps of:

s1, coagulation and flocculation preparation: adding 25kg of PAC white medicinal powder into a coagulated PAC box (15) through a coagulated PAC dosing mechanism (12), and adding 25kg of PAM white medicinal powder into a flocculation PAM box (6) through a flocculation PAM dosing mechanism (7);

s2, coagulation, flocculation and stirring: simultaneously starting a third motor (131) and three groups of second motors (101), and fully stirring for 30 min;

s3, feeding: starting a sludge pump (2) to discharge sludge in the freshwater aquaculture fishpond (1) into a sludge box (4);

s5, sludge stirring: starting a first motor (31), and fully stirring for 15 min;

s6, sludge dewatering: and (3) starting a sludge screw pump (16) and a fourth motor (224), starting a coagulation PAC screw pump (18) and a flocculation PAM screw pump (20) in a front-back sequence, adding a coagulant and a flocculant in sequence in the process that sludge enters a conveying cylinder (226), allowing water to flow out through a sludge discharge port (26) of the horizontal spiral centrifuge, and discharging the sludge through a water discharge port (25) of the horizontal spiral centrifuge.

Technical Field

The invention relates to the technical field of freshwater aquaculture sludge dewatering, in particular to freshwater aquaculture sludge dewatering integrated equipment and a sludge dewatering method.

Background

In freshwater aquaculture, as the culture time increases, the culture pond gradually ages. Meanwhile, due to the development of production, farmers excessively pursue high-yield cultivation, the stocking density is increased, and the bait feeding quantity is increased. For this reason, the excrement of the cultivated animals, the residual bait that has not been ingested, the organic matter left by the death of various organisms, and the like. The self-cleaning capacity of the water body is far exceeded, and the organic matters are difficult to be sufficiently and effectively decomposed in time and are accumulated at the bottom of the pond to form sludge (silt).

The sludge at the bottom of the pond is harmful to aquaculture, and the sludge increases oxygen consumption. The bottom is easy to cause oxygen deficiency. Sludge is various toxic and harmful substances (ammonia nitrogen, nitrite, hydrogen sulfide), warehouses for accumulating various pathogenic microorganisms and parasites and the like, and has great influence on fishponds. The sludge cleaning work of the fishpond is required, the function of the common sludge modifying agent is not great, and the most effective method is sludge excavation. The dug-out pond sludge is a good fertilizer because the pond sludge contains a large amount of organic substances, particularly rich nitrogen, phosphorus and potassium, which are necessary nutrients for crop growth. Is a fertilizer which is very beneficial to the growth of crops. As long as the method is used correctly, the effect of changing waste into valuable can be achieved, and the aim of recycling national wastes is fulfilled.

The sludge dug out has too high water content and the like, so the direct fermentation composting cannot be carried out. Meanwhile, in local freshwater aquaculture, the problems of no effective technical means, treatment management, inadequate measures and the like in pond sludge treatment exist, farmers have serious steal and discharge, large-area steal and discharge is concentrated at night, and the surrounding environment is seriously polluted.

The above problems have been studied, explored and practiced for several years. The concept of reconsidering the sludge at the bottom of the pond is proposed. The sludge at the bottom of the pond is a big hazard in aquaculture, but at the same time, the sludge contains various organic matters, mineral elements and various nutrient elements required by the growth of organisms.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide freshwater aquaculture sludge dewatering integrated equipment and a sludge dewatering method, and solves the problems that the prior art is high in operation cost, low in treatment efficiency, high in sludge water content after equipment dewatering, low in floater removal rate effect after equipment treatment and the like.

2. Technical scheme

In order to solve the problems, the invention adopts the following technical scheme:

the freshwater aquaculture sludge dewatering integrated equipment comprises a freshwater aquaculture fish pond and a sludge pump, wherein a first pipeline is fixed between a sludge pumping port of the sludge pump and an outlet of the freshwater aquaculture fish pond, a sludge discharging port of the sludge pump is fixed with a second pipeline, the second pipeline is connected with a sludge box, and the second pipeline is inserted into the sludge box;

a sludge stirring mechanism is arranged on the sludge tank;

a ninth pipeline is fixed at the outlet of the sludge tank, the other end of the ninth pipeline is connected with a sludge screw pump, the ninth pipeline is fixed with a sludge pumping port of the sludge screw pump, and a thirteenth pipeline is fixed at a sludge discharge port of the sludge screw pump;

a fourteenth pipeline is fixed on the thirteenth pipeline, the other end of the fourteenth pipeline is connected with a concrete PAC screw pump, and the fourteenth pipeline is fixed with a water outlet of the concrete PAC screw pump;

a twelfth pipeline is fixed at a water pumping port of the coagulation PAC screw pump, the other end of the twelfth pipeline is connected with a coagulation PAC box, the twelfth pipeline is fixed with an outlet of the coagulation PAC box, a coagulation PAC stirring mechanism is arranged on the coagulation PAC box, a coagulation PAC dosing mechanism is fixed at the upper end of the coagulation PAC box, and a first valve is arranged on the coagulation PAC dosing mechanism;

a fifteenth pipeline is fixed on the thirteenth pipeline, the other end of the fifteenth pipeline is connected with a flocculation PAM screw pump, and the fifteenth pipeline is fixed with a water outlet of the flocculation PAM screw pump;

a sixth pipeline is fixed at a water pumping opening of the flocculation PAM screw pump, a third pipeline, a fourth pipeline and a fifth pipeline are fixed on the sixth pipeline, the other ends of the third pipeline, the fourth pipeline and the fifth pipeline are connected with a flocculation PAM box, the third pipeline, the fourth pipeline and the fifth pipeline are fixed with an outlet of the flocculation PAM box, three groups of flocculation PAM stirring mechanisms are arranged on the flocculation PAM box, a flocculation PAM dosing mechanism is fixed at the right part of the upper end of the flocculation PAM box, and a second valve is installed on the flocculation PAM dosing mechanism;

an eleventh pipeline and a ninth pipeline are respectively inserted into the coagulation PAC box and the flocculation PAM box, an eighth pipeline is fixed at one outlet of the ninth pipeline and the eleventh pipeline, the other end of the eighth pipeline is connected with a tap water pump, the eighth pipeline is fixed with a water outlet of the tap water pump, and a seventh pipeline is fixed at a water pumping port of the tap water pump;

the other end of the thirteenth pipeline is connected with a horizontal spiral centrifuge through a horizontal spiral centrifuge sludge inlet, a horizontal spiral centrifuge water outlet and a horizontal spiral centrifuge sludge discharge port are formed in the horizontal spiral centrifuge, and the problems that the prior art is high in operation cost, low in treatment efficiency, high in sludge water content after equipment dehydration, low in floating object removal rate effect after equipment treatment and the like are solved.

As a preferable scheme of the invention, a silt front end grid is fixed at an outlet of the freshwater aquaculture fish pond.

As a preferable scheme of the present invention, the sludge stirring mechanism includes a first motor, a first stirring shaft, and a first stirring blade, the first motor is fixed to an upper end of the sludge tank, an output end of the first motor penetrates through the sludge tank, the first stirring shaft is fixed to an output end of the first motor, the first stirring blade is provided in plurality, and the plurality of first stirring blades are uniformly fixed to a circumferential surface of the first stirring shaft.

As a preferable scheme of the invention, a sludge tank liquid level sensor is fixed in the sludge tank.

As a preferable scheme of the present invention, the coagulation PAC mixing mechanism includes a third motor, a third mixing shaft and a third mixing blade, the third motor is fixed to an upper end of the coagulation PAC box, an output end of the third motor penetrates through the coagulation PAC box, the third mixing shaft is fixed to an output end of the third motor, the third mixing blade is provided in plurality, and the plurality of third mixing blades are uniformly fixed to a circumferential surface of the third mixing shaft.

In a preferred embodiment of the present invention, a coagulation PAC tank level sensor is fixed in the coagulation PAC tank.

As a preferable scheme of the present invention, each group of flocculation PAM stirring mechanisms includes a second motor, a second stirring shaft, and a second stirring blade, the second motor is fixed to an upper end of the flocculation PAM tank, an output end of the second motor penetrates through the flocculation PAM tank, the second stirring shaft is fixed to an output end of the second motor, each group of the second stirring blades is provided with a plurality of second stirring blades, and the plurality of second stirring blades are uniformly fixed to a circumferential surface of the second stirring shaft.

As a preferable scheme of the invention, a flocculation PAM tank liquid level sensor is fixed in the flocculation PAM tank.

As a preferable scheme of the invention, the horizontal screw centrifuge comprises four bases, a base, four screw conveying blades, a fourth motor, a screw conveying shaft and a conveying cylinder, wherein the base is respectively fixed at four corners of the lower end of the base, the conveying cylinder is fixed at the upper end of the base, the fourth motor is fixed at the left end of the conveying cylinder, the output end of the fourth motor penetrates through the conveying cylinder, the screw conveying shaft is fixed at the output end of the fourth motor, the screw conveying blades are fixed on the circumferential surface of the screw conveying shaft, a sludge discharge port of the horizontal screw centrifuge is fixed at the lower end of the conveying cylinder, the lower end of the sludge discharge port of the horizontal screw centrifuge penetrates through the conveying cylinder and the base in sequence, a filter screen is fixed between the inner walls of the sludge discharge port of the horizontal screw centrifuge, and the upper end of the filter screen is flush with the lower inner wall of the conveying cylinder, the water outlet of the horizontal spiral centrifuge is fixed at the lower end of the conveying cylinder, and the lower end of the water outlet of the horizontal spiral centrifuge sequentially penetrates through the conveying cylinder and the base.

As a preferable scheme of the present invention, a sludge flow meter is installed on the thirteenth pipeline, and the sludge flow meter is located between the sludge screw pump and the fourteenth pipeline;

a horizontal spiral centrifuge flowmeter is arranged on the thirteenth pipeline and positioned between the fifteenth pipeline and the horizontal spiral centrifuge;

a coagulation PAC flowmeter is arranged on the fourteenth pipeline;

and a flocculation PAM flowmeter is arranged on the fifteenth pipeline.

The dewatering method of the sludge in the freshwater aquaculture comprises the following steps:

s1, coagulation and flocculation preparation: adding 25kg of PAC white medicinal powder into a coagulated PAC box through a coagulated PAC dosing mechanism, and adding 25kg of PAM white medicinal powder into a flocculation PAM box through a flocculation PAM dosing mechanism;

s2, coagulation, flocculation and stirring: simultaneously starting a third motor and three groups of second motors, and fully stirring for 30 min;

s3, feeding: starting a sludge pump, and discharging sludge in the freshwater aquaculture fishpond into a sludge box (4);

s5, sludge stirring: starting a first motor, and fully stirring for 15 min;

s6, sludge dewatering: and starting the sludge screw pump and the fourth motor, starting the coagulation PAC screw pump and the flocculation PAM screw pump in a front-back sequence, sequentially adding a coagulant and a flocculant in the process that the sludge enters the conveying cylinder, allowing water to flow out through a sludge discharge port of the horizontal spiral centrifuge, and discharging the sludge through a water discharge port of the horizontal spiral centrifuge.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the sludge dewatering integrated equipment for the freshwater aquaculture is used for treating, the treated sludge is used for cultivating sludge for fermentation composting to produce farmyard manure or organic fertilizer, and the treated water is used as reuse water or farmland irrigation.

(2) The sludge for freshwater aquaculture is recycled, so that the sludge is beneficial to the health of human and livestock, the problems of sludge loss, river pollution and the like commonly existing in freshwater aquaculture are solved, the sanitary environment around the freshwater aquaculture is improved, and the -good environmental benefit is achieved.

(3) The scheme solves the problems that the prior art is high in running cost, low in treatment efficiency, high in water content of sludge after equipment dehydration, low in floater removal rate effect after equipment treatment and the like.

Drawings

FIG. 1 is a schematic structural view of the integrated dewatering equipment for freshwater aquaculture sludge according to the invention;

FIG. 2 is a schematic structural view of a sludge stirring mechanism according to the present invention;

FIG. 3 is a schematic diagram of the structure of the present invention at the position of a coagulated PAC stirring mechanism;

FIG. 4 is a schematic structural view of a flocculation PAM stirring mechanism of the present invention;

FIG. 5 is a schematic view of the horizontal screw centrifuge according to the present invention.

The reference numbers in the figures illustrate:

1. freshwater aquaculture fish ponds; 2. a sludge pump; 201. a first conduit; 202. a second conduit; 3. a sludge stirring mechanism; 31. a first motor; 32. a first stirring shaft; 33. a first stirring blade; 4. a sludge tank; 5. a sludge tank liquid level sensor; 6. a flocculation PAM box; 601. a third pipeline; 602. a fourth conduit; 603. a fifth pipeline; 604. a sixth pipeline; 7. a flocculation PAM dosing mechanism; 8. a seventh pipe; 9. a tap water pump; 901. an eighth conduit; 902. a ninth conduit; 903. an eleventh pipe; 10. a flocculation PAM stirring mechanism; 101. a second motor; 102. a second stirring shaft; 103. a second stirring blade; 11. a flocculation PAM tank liquid level sensor; 12. a coagulation PAC dosing mechanism; 13. a coagulation PAC stirring mechanism; 131. a third motor; 132. a third stirring shaft; 133. a third stirring blade; 14. a coagulation PAC tank liquid level sensor; 15. coagulating a PAC box; 1501. a twelfth duct; 16. a sludge screw pump; 161. a ninth conduit; 162. a thirteenth pipe; 163. a fourteenth pipe; 164. a fifteenth conduit; 17. a sludge flow meter; 18. coagulating PAC screw pump; 19. a coagulated PAC flow meter; 20. flocculating PAM screw pump; 21. a flocculating PAM flow meter; 22. a horizontal spiral centrifuge; 221. a base; 222. a support pillar; 223. a screw conveying blade; 224. a fourth motor; 225. a screw conveying shaft; 226. a delivery cartridge; 23. a horizontal spiral centrifuge flow meter; 24. a sludge inlet of the horizontal spiral centrifuge; 25. a water outlet of the horizontal spiral centrifuge; 26. a sludge discharge port of the horizontal spiral centrifuge.

1. Detailed description of the preferred embodiments

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.