30results about How to "Reduce negative pressure loss" patented technology

The invention relates to a method for cutting string-shaped food, wherein the string shaped item (7) of food is fed to the cutting device by means of the feed device, and the cutting device cuts the string shaped item (7) into pieces, strips or blocks. The string shaped item (7) is fixed by a vaccum gripper(1) which is fed along with the item (7) during feed movement. The method involves producing a negative pressure in an interior of a contact element (29) of a vacuum gripper, where the pressure acts on a fixing region (42,43) of a surface of the string shaped item (7) in an internal suction region(36,37) of the contact element(29). The item(7) is cut by at least two annular cutting edges(33,35) which encloses the suction region(36,37) of the contact element (29) for improving seal performance of the suction region(36,37).

The invention discloses a bituminous mixing plant which comprises a main building and a negative pressure dust removal device, wherein the main building comprises a vibration sieve, a hot aggregate bin, an aggregate balance, a mixer and a finished product bin which are arranged in sequence from top to bottom; the negative pressure dust removal device communicates with the main building; the main building further comprises a material overflow pipe and a closed material overflow bin; and one end of the material overflow pipe communicates with the hot aggregate bin, and the other end of the material overflow pipe communicates with the material overflow bin. By the additional arrangement of the closed material overflow bin, the material overflow pipe is not arranged outside and connected with the atmosphere in a traditional way, but is connected with the closed material overflow bin, so that not only can the material overflow pipe be used as a material overflow channel, but also the material overflow pipe can form a closed space with the closed material overflow bin, and the closed space becomes a negative pressure channel in a replacing manner; negative pressure generated by the negative pressure dust removal device is retained in the whole main building, and communication between the negative pressure and the atmosphere via the hot aggregate bin and the material overflow pipe is avoided, so that the negative pressure loss and the operation waste of equipment are reduced to an extremely large extent; and moreover, constant negative pressure in the plant is guaranteed favorably, the influence of negative pressure fluctuation on metering is reduced, and the metering accuracy is improved.

The invention relates to a balling-resisting quick change rotary suction nozzle device, belonging to the technical field of spinning machines. The balling-resisting quick change rotary suction nozzle device comprises a horizontally arranged main shaft (1), wherein a suction arm (2) is inserted into the end part of the main shaft (1) and comprises a horizontal section (2.1) and an inclined section (2.2), the end part of the inclined section (2.2) of the suction arm (2) is connected with a suction nozzle (5), and a suction nozzle end surface of the suction nozzle (5) is parallel to the central line of the main shaft (1). According to the balling-resisting quick change rotary suction nozzle device disclosed by the invention, the suction nozzle and the suction arm are of quick connection structures and are very convenient to replace, and the lengths of the suction nozzle and the suction arm can be configured as required; a rubber suction nozzle is sleeved on the suction nozzle so that the suction nozzle does not generate static electricity with a filtering material so as to be capable of effectively preventing the filtering material from balling and hardening and prolonging the service life of the filtering material. The horizontal section and the inclined section of the suction arm are bent into 120 degrees, a diameter range is set, the area of a suction nozzle is large, and the loss of negative pressure is less.

The invention discloses a novel suction system of a piggyback cotton picker, comprising a main case, a main air blower and a circuit board controlling the main air blower. A negative pressure cavity is formed in the main case when the main air blower rotates to work; an air inlet of the main blower is provided with a screen connected in a rotary way; an air lock is arranged between the negative pressure cavity and a cotton outlet at the bottom of the main case, and the air lock is tightly matched with the inner wall of the main case to separate the inside of the negative pressure cavity from atmosphere; the suction system is also provided with a heat dissipation structure comprising a cooling blade arranged on an output shaft of a main motor, a deflector hole for inspiration is arranged on the air blower case corresponds corresponding to the cooling blade, the air blower case is provided with an air outlet with a downward opening at the bottom of the cooling blade, and the bottom of the air blower case is provided with a ventilate grid communicated with atmosphere; the cooling blade sucks the air into the air blower case by the deflector hole, and air is exhausted to atmosphere bythe air outlet and the ventilate grid. The invention has the advantages of high cotton picking efficiency, low broken fuzz content, low picking loss power, simple structure, reliable work and low failure rate.

The invention discloses a connecting device of a furnace end smoke collection pipeline, relates to a coal charging smoke collection device of a tamping coke furnace, and solves the technical problems of inaccuracy for butting, poor sealing effect and incapability of normally collecting furnace end smoke in a conventional blind sleeve. The connecting device comprises a flap valve switching-on device and a blind sleeve butting device, and is used for communicating an upper pipeline with a lower pipeline; a flap valve drive oil cylinder of the flap valve switching-on device is connected with a push rod; a blind sleeve butting drive oil cylinder of the blind sleeve butting device is hinged to a swing arm, and the other end of the swing arm is connected with a blind sleeve; a vertical limiting block is mounted at the joint between a blind sleeve body and the swing arm, and a ceramic fiber blanket sealing ring is arranged on the edge of a butting hole of the blind sleeve body. The connecting device is used for connecting the upper and lower pipelines of the furnace end smoke collection pipeline and has the advantages of space saving, simple structure, accuracy for alignment, good sealing effect and the like.

The invention relates to an agricultural seeding device, in particular to a suction type precision seed bunch planting device. The suction type precision seed bunch planting device mainly comprises a seed tank (26), a suction type seed sorter, a roller, a negative pressure air suction pipe (6), a speed shifting mechanism and a seed receiving and delivering device, wherein the suction type seed sorter is arranged in the roller and communicated with the negative pressure air suction pipe (6); a seed delivering box (30) is arranged between a seed outlet of the suction type seed sorter and a ducknozzle (42); a main shaft (4) of the roller is a hollow pipe; a main shaft (9) of the suction type seed sorter is arranged in the hollow pipe-shaped main shaft (4) of the roller; one end of the main shaft (9) of the suction type seed sorter is coupled to the suction type seed sorter through a bearing (8.1) and drives a seed suction disk (33), and the other end of the main shaft (9) of the suctiontype seed sorter passes through a sealing bearing (8) in the main shaft (4) of the roller; the main shaft (4) of the roller and the main shaft (9) of the suction type seed sorter are in speed-shifting connection through a gear or a chain or a notched belt. The suction type precision seed bunch planting device has the advantages of increasing the inner space of the roller as much as possible, increasing the height of the seed delivering box simultaneously, conveniently regulating the rotating speed ratio of the roller to the seed absorption box according to the agronomic requirements, and greatly improving the seeding speed while seeding accurately. Due to the unique transmission structure, the suction type precision seed bunch planting device is compact and steady, and the fault rate is reduced obviously under the environment of worse working condition.

The invention relates to an intermediate storage tank for collecting domestic sewage and also relates to a domestic sewage source separation system under negative pressure adopting the intermediate storage tank. The intermediate storage tank comprises a tank body, an induction valve, a control valve, a storage tank sewage discharge negative pressure valve and a microprocessor, wherein, the tank body is provided with an induction tube and a storage tank sewage discharge pipe, the upper middle part of the tank body is provided with a sewage inlet and the upper part of the tank body is provided with one or a plurality of air inlets, the lower end ports of the induction tube and the storage tank sewage discharge pipe are positioned inside the tank body, the upper part of the inner cavity of the induction tube is communicated with the induction valve by an internal pressure connecting mouth, an induction signal output route of the induction valve is connected with a signal input terminal of the microprocessor, a control signal output line of the microprocessor is connected with a control route of the control valve, a negative pressure control pipeline of the control valve is connected with a negative pressure control cavity of the storage tank sewage discharge negative pressure valve, and the storage tank sewage discharge pipe is connected with a negative pressure sewage discharge pipeline by the storage tank sewage discharge valve. The domestic sewage source separation system comprises a plurality of the intermediate storage tanks and one or a plurality of sewage collection tanks, and is provided with a uniform negative pressure source. The domestic sewage source separation system is beneficial to reducing power consumption and realizing the source separation of the domestic sewage.

A range hood with a movable smoke deflecting plate and its control method, an installation cavity is formed between the fan frame and a decorative outer cover, a smoke collecting hood is installed under the decorative outer cover, and a smoke guiding plate is installed under the air inlet of the smoke collecting hood , the volute positive pressure drainage tube and the lifting mechanism are installed in the installation cavity, the inlet end of the volute positive pressure drainage tube is connected with the inside of the volute of the fan, and the outlet end of the volute positive pressure drainage tube is connected with the driving mechanism. The airflow flowing out from the gas outlet constitutes the driving source of the driving mechanism, and the smoke guiding plate can move relative to the smoke collecting hood driven by the lifting mechanism. The advantage of the present invention is that: the positive pressure drainage pipe of the volute of the range hood draws out the air flow from the inside of the volute as a driving source to drive the lifting mechanism, so that the smoke guide plate can move relative to the smoke collection hood, and the movement posture of the smoke guide plate can be controlled. Intelligent adjustment not only has fewer moving parts, simple structure, low cost, and easy disassembly and assembly, but also realizes the reuse of the airflow inside the volute and reduces the negative pressure loss of the range hood.

The invention provides a dust-collection sanitation vehicle. The dust-collection sanitation vehicle comprises a cab, a vehicle frame, an engine power output shaft and a compartment. A draught fan is installed on the vehicle frame. A driving belt wheel is installed on the engine power output shaft. A driven belt wheel is installed on a draught fan spindle. The driving belt wheel is in transmission connection with the driven belt wheel through a belt. The lower portion of the vehicle frame is connected with a main dust collection pipe. The main dust collection pipe is provided with a dust collection port. The main dust collection pipe is connected with an air suction port of the draught fan through a telescopic hose. The compartment comprises a base plate, side plates, a front plate and a tail door. A first dust filtering plate assembly and a second dust filtering plate assembly are detachably connected to the interior of the compartment. The first dust filtering plate assembly is vertically arranged on the tail of the compartment and spaced from the tail door by a certain distance. The second dust filtering plate assembly is horizontally arranged at the top of the compartment. A dust collection cavity used for collecting dust is defined by the base plate, the side plates, the front plate, the first dust filtering plate assembly and the second dust filtering plate assembly. An air inlet communicating with the dust collection cavity is formed in the compartment. An air outlet of the draught fan is connected with the air inlet in the compartment.

The dual-hole air-suction universal energy-saving seed metering device for soybeans and corn belongs to the technical field of agricultural machinery. The edge of the seed metering device in the present invention is provided with a double-suction hole seed-taking groove, and a groove is arranged in the seed-taking groove for soybean harvesting. The double suction hole is connected with the air suction channel, and the air suction channel is connected with the double suction hole and the negative pressure chamber. The negative pressure chamber is formed by the cooperation of the disc body and the gas cover. There is an isosceles cone ring on the body; the air cover fits on the bearing, and the ring fastens the air cover on the bearing; The isosceles cone ring clearance fit of the disc body and the gas cover is ensured. The invention realizes the universal seeding of soybeans and corns, and it is known from aerodynamics that the clearance fit between the waist surface of the isosceles cone ring will form a continuous curved path, which will have a throttling effect on the air flow, thereby reducing the air-suction discharge rate. The air pressure loss of the seeder.

The invention provides a negative pressure compact siro spinning machine, which belongs to the technical field of textiles. It solves the problem that the existing negative-pressure compact siro spinning machine is very inconvenient to clean the hairiness and broken ends in the waste cotton collection box. When cleaning, all must be shut down and the fan stops, so the entire production line cannot continue to work. problems leading to reduced productivity. The negative pressure compact siro spinning machine includes a frame, and the frame is provided with a front roller device, a middle roller device, a rear roller device, a yarn guide hook, a special-shaped tube device and an air suction device, and the air suction device includes a The suction branch pipe connected with the negative pressure collecting pipe of the special-shaped pipe device, the cotton suction pipe with the port facing the surface of the front roller assembly, the negative pressure air collection pipe connected with the suction branch pipe, and the cotton suction air collection pipe connected with the cotton suction pipe Pipes, fan boxes. Negative pressure fan, centrifugal fan, and cotton cleaning air pump do not interfere with each other. Operators can clean the hairiness stored in the waste cotton collection box at any time without affecting the normal operation of the spinning machine.

The present invention relates to the technical field of thrombus suction, and provides a suction catheter. The suction catheter of the present invention includes a catheter and a support frame. One end of the conduit is provided with an elastic pipe section, and the other end of the conduit is provided with a main pipe joint and a first joint communicating with the inner cavity of the conduit. The support frame includes a first pulling guide wire and an elastic frame; the elastic frame is slidably arranged in the catheter after being compressed, and the elastic frame can provide elastic force to expand the diameter of the elastic tube section; one end of the first pulling wire is connected with the elastic frame, and the first pulling wire is connected to the elastic frame. The other end of the guide wire extends out of the main pipe joint; pushing the first pulling guide wire can make the elastic frame slide. When the suction catheter of the present invention is used, the elastic frame expands the diameter of the elastic tube section, and under the constraint of the inner wall of the blood vessel, the outer wall of the elastic tube section and the inner wall of the blood vessel fit the inner lumen diameter of the elastic tube section, and the inner lumen diameter of the elastic tube section is also increase at the same time. This enables the aspiration catheter to aspirate thrombi from vessels of different sizes.

The invention relates to a ComforSpin negative pressure airflow gathering mechanism. A left airflow gathering piece comprises an arc left base and a left cover body. An air cavity is arranged in the left cover body. A left gathering groove is formed in the top of the left cover body. A right airflow gathering piece comprises an arc right base and a right cover body. An air cavity is arranged in the right cover body. A right gathering groove is formed in the top of the right cover body. The left airflow gathering piece is in sealed connection with the right airflow gathering piece through a left concave-convex groove in the inner side face of the left base and a right concave-convex groove in the inner side face of the right base in an inserting mode. The back portion of the left cover body and the back portion of the right cover body are spliced to form a connecting pipe connector. Cover plates with front blocking plates are hinged to the left cover body and / or the right cover body. When the cover plates are arranged on the opening sides of the left cover body and the right cover body and on the left base and the right base in a covering mode, the cover plates are connected with the left airflow gathering piece and the right airflow gathering piece in a clamping mode. The cover plates, the air cavity on the left airflow gathering piece and the air cavity on the right airflow gathering piece form a channel which is needed by negative pressure airflow during gathering. The ComforSpin negative pressure airflow gathering mechanism has the advantages of being simple in structure, gathering effect is improved, the inner flying blocking phenomenon is avoided, and energy is saved.