71results about How to "Reduce internal and external pressure difference" patented technology

The invention discloses a rotary pluggable photoelectric combined connector used in deep sea. The connector includes a plug and a socket which are matched with each other, and the plug includes a plugshell body, a plug elastic capsule body, a plug web, a plug tail plate and a plurality of plug photoelectric insertion cores; the socket comprises a socket shell body, a socket elastic capsule body,a socket web, a socket tail plate, a plurality of socket photoelectric insertion cores and a movable cavity; the connector is also provided with rotary mechanisms capable of covering/uncovering channels cooperating with the socket photoelectric insertion cores and the plug photoelectric insertion cores, and a locking mechanism is arranged between the front end of the plug and the front end of thesocket. The rotary pluggable photoelectric combined connector can adapt to working environments different in depth, and is reliable in sealing, simple to operate and small in required strength for plugging and pulling.

The invention relates to a bearing spiral combined sealing structure of a high-speed roller bit. The bearing spiral combined sealing structure comprises a roller cone, a bearing, a spiral seal ring and an O-shaped rubber ring. The spiral seal ring is installed in a spiral groove of a roller cone inner hole. When the bit rotates at a high speed, through the pumping effect of the spiral groove, a function of automatically draining sand is achieved. The pressure of the outer side of the O-shaped rubber ring is added, the pressure difference of the two sides of the O-shaped rubber ring is reduced, and the sealing effect of the O-shaped rubber ring is improved. The O-shaped rubber ring is located above the spiral seal ring and installed in a bearing groove with a certain interference. When the bit rotates at a high speed, the auxiliary two-stage sealing is achieved, and the bit can also achieve the effective sealing effect when stopping rotating. The bearing spiral combined sealing structure has good sand draining performance, the abrasion to the bearing can be effectively reduced, the sealing requirements under different working conditions can be met, the sealing reliability and stability are greatly improved, the sealing service life is prolonged. Other supporting elements are not needed for the sealing, and precious time is saved for the roller bit.

The invention relates to a filtering structure. The filtering structure comprises a face cover body and a fold layer. The fold layer comprises a plurality of folds and is arranged on the face cover body. The surface area of the fold layer is larger than the surface area of the face cover body. Thus, the filtering area of the filtering structure can be effectively enlarged, the filtering effect of the filtering structure is improved, and the breathability of the filtering structure is improved.

The invention relates to a vacuum glass air-exhaust port. The air-exhaust port is characterized in that the upper glass of the vacuum glass is perforated, such that the air-exhaust port is formed. A sealing ring is prepared on the lower surface of the upper glass at the periphery of the air-exhaust port. A sealing box is placed at a place on the upper surface of the lower glass and corresponding to the air-exhaust port. The sealing ring can be inserted into the sealing box. After edge-sealing of the upper and lower glass, a metal solder is placed into the air-exhaust port. The air-exhaust port is vacuumed and heated such that the metal solder is molten into liquid, and the liquid is retained in the sealing box. The sealing ring is also immersed in the liquid. The air-exhaust port is automatically sealed according to a liquid sealing principle. After cooling, the liquid is solidified, such that air-tight sealing upon the air-exhaust port is realized. The method provided by the invention can be used in mass productions. With the method, vacuum glass production efficiency and qualification rate can be greatly improved, and production cost can be reduced.

The invention discloses an ultrahigh pressure cylinder, which comprises an internal cylinder and an external cylinder. The rear part of the internal cylinder is sealed with the external cylinder. A steam inlet pipe and a steam exhaust pipe are connected on the external cylinder. The steam inlet pipe passes through the external cylinder and extends into the internal cylinder. Steam enters the internal cylinder through the steam inlet pipe. The front end of the internal cylinder is of a sealed structure. A communication pipe is hermetically connected on the internal cylinder. The other end of the communication pipe is hermetically connected on a steam exhaust opening of the external cylinder. Steam in the internal cylinder is directly discharged to the steam exhaust pipe through the communication pipe. A sealed interlayer space is formed between the internal and external cylinders. A high pressure heater that conveys relatively stable steam to the interlayer space is connected on the external cylinder. When the ultrahigh pressure cylinder operates normally, the steam pressure in the internal cylinder, the steam pressure in the interlayer space and the atmospheric pressure outside the external cylinder decrease progressively. The ultrahigh pressure cylinder reduces the internal and external pressure difference of the external cylinder and maintains the reasonable wall thickness of the external cylinder when through-flow is not changed and steam exhaust pressure is increased so as to alleviate the difficulty in design and manufacturing. The ultrahigh pressure cylinder has strong practicality and high safety.

The invention provides a dust recovery device and a recovery method of hygiene products. The dust recovery device of hygiene products comprises a dust recovery device, wherein the dust recovery device comprises a left box body, a middle box body and a right box body which are arrayed in an assembly way; air outlets of air suction fans are communicated with the left box body; a dust collection device is arranged in the middle box body, the dust collection end of the dust collection device stretches into the right box body and extends to the position between two adjacent filtering devices, a dust collection fan is arranged outside the middle box body, and one end of the dust collection fan is connected with the dust collection device, and the other end of the dust collection fan is communicated with a dust box; and multiple layers of filtering devices are horizontally arranged in the right box body in a sleeving way, air outlets are arranged on right sides of the filtering devices, and the air outlets are used for being communicated with the inner parts of the filtering devices and the outside. According to the invention, as the multiple layers of filtering devices are adopted, the filtering area is large; the internal and external pressure difference of the dust recovery device is small, so that villi in the dust are not damaged easily; and the recovered dust is collected rather than being used directly, so that the impurities in the dust is prevented from influencing the subsequent product quality.

The invention disclose an air inflation awl for a pulverized coal gasification device. The air inflation awl comprises a taper-shaped barrel and a reinforcement part, wherein the taper-shaped barrel is provided with at least one air inflation area made of sintering metal; the reinforcement part is arranged on the wall of the taper-shaped barrel and at least covers the air inflation area; and a plurality of through holes are formed in the reinforcement part. According to the air inflation awl for the pulverized coal gasification device, which is disclosed by the embodiment of the invention, the strength of the air inflation awl is improved by arranging the reinforcement part covered on the air inflation area, so that the air inflation awl can bear a higher internal and external pressure difference, the highest internal and external pressure difference of 1Mpa, which can be borne by the traditional air inflation awl, is improved to 5Mpa so as to greatly lower the damage possibility of the air inflation awl and prolong the service life of the air inflation awl to lower the cost, meanwhile, the parking times of the air inflation awl are reduced, and the production efficiency is improved. In addition, according to the air inflation awl disclosed by the embodiment of the invention, the phenomenon that the pulverized coal flows back can be effectively prevented, and the pulverized coal conveying effect is guaranteed.

The invention relates to the technical field of refrigeration, in particular to an air pressure balance structure for a refrigeration device and the refrigeration device. The inner end of an airflow pipe of the air pressure balance structure is communicated with a refrigeration cavity of the refrigeration device, the outer end of the airflow pipe is communicated with the environment, a fan is arranged in the airflow pipe, and the rotation surface of the fan is disposed in the airflow direction in the airflow pipe. The air pressure balance structure is arranged in a box door of the refrigeration device. When a refrigerator performs refrigeration, due to temperature changes, external airflow enters a box body through the airflow pipe, and the fan is driven to rotate. In the process, when internal and external pressure difference of the refrigeration device (such as the refrigerator) is large, the rotating speed of a fan rotor is accelerated, the internal and external pressure difference of the refrigerator can be quickly reduced; during a normal state, the internal and external pressure difference of the refrigerator is small, a rotating force of the fan rotor is weak, the fan rotor almost does not rotate, the fan rotor and the outer end of the airflow pipe form a relatively sealed environment, and cool air leakage is avoided. The air pressure balance structure is simple in overall structure, the internal and external pressure difference of the refrigerator can be quickly reduced, and conditions that it is difficult to open a refrigerator door of the refrigerator are avoided.

The invention discloses a method and device for quickly separating oil and water under high temperature and high pressure. The device comprises an upper shell and a lower shell; a hydrocyclone is arranged in the upper shell and used for primary separation; the lower shell is provided with a coalescer for secondary separation; and an overflow liquid outlet and an underflow liquid outlet are arranged on the upper shell and can be respectively connected with an overflow liquid backflow port and an underflow liquid backflow port arranged on the top of the lower shell through pipelines. According to the method and the device, the high-temperature and high-pressure resistance of the hydrocyclone can be improved by changing the connection positions of outer interfaces of the upper shell and the lower shell according to the change of the composition of a separated medium, so that the rapid separation of oil and water in one device can be realized, and the separation efficiency can be improved.

The invention relates to a vacuum glass air-exhaust port structure. The structure is characterized in that: a round hole is provided on the upper glass of the vacuum glass, such that the air-exhaust port is formed; a round pipe is prepared and inserted into the round hole, and the upper end of the round pipe is welded with the upper glass; a sealing ring is prepared on the upper surface of the lower glass, and a recess or a recessed groove is prepared in the sealing ring, wherein the lower end of the round pipe can be inserted into the recess or recessed groove; after edge-sealing of the upper and lower glass, a metal solder is placed into the air-exhaust port or round pipe; the air-exhaust port is vacuumed and heated such that the metal solder is molten into liquid, and the liquid is retained in the recess or recessed groove and in the sealing ring; the lower end of the round pipe is also immersed in the liquid; and the air-exhaust port is automatically sealed according to a liquid sealing principle. The method provided by the invention can be used in mass productions. With the method, vacuum glass production efficiency and qualification rate can be greatly improved, and production cost can be reduced.

The invention discloses a built-in economizer-type two-stage compressor, which includes a shell, and a horizontal and straight drive crankshaft is arranged in the shell, and a pump assembly I is installed on one end of the drive crankshaft, and a pump assembly II is installed on the other end of the drive crankshaft. A high and low voltage isolation plate is installed on the outside of component II, and the two ends of the housing are sealed by end caps I and II to form a closed chamber. The high and low voltage isolation plate will divide the chamber into chamber I and chamber Chamber II, the two chambers are respectively connected with suction pipe and exhaust pipe, and the drive crankshaft inside the pump assembly II in chamber I is equipped with an economizer. The economizer of the present invention is located inside the compressor, does not occupy the system space at all, and solves the problem that the prior art economizer occupies space independently; Tubes, on the basis of reducing costs, improve heat exchange efficiency.

The invention provides a low-pressure-difference sealing gravity compressed air energy storage system and method.The energy storage system comprises a vertical shaft and a sealing film, a gravity plunger is movably inserted into the vertical shaft, and a gap is formed between the vertical shaft and the gravity plunger; the sealing film is located in the gap, and the sealing film is connected with the vertical shaft and the gravity plunger in a sealed mode, so that an air storage cavity is defined by the gravity plunger, the sealing film and the space, located below the sealing film, of the vertical shaft and used for storing compressed air. A regulating cavity is defined by the sealing film, the gravity plunger and the space, located above the sealing film, of the vertical shaft, pressure liquid is introduced into the regulating cavity, and the pressure liquid exerts downward pressure on the sealing film through injection of the pressure liquid into the regulating cavity above the sealing film. The pressure effect of the pressure liquid on the sealing film can reduce the internal and external pressure difference of the sealing film, thereby reducing the stress of the sealing film, prolonging the service life of the sealing film and reducing the cost of the sealing film.

The invention discloses a numerical control pulse blow-cleaning dust removing system and an urban road vacuum sweeper. The numerical control pulse blow-cleaning dust removing system comprises a bag-type dust remover, an air separation cylinder, a flying dust cover, an exhaust pipe, and a ventilation pipe; a circulatory system is formed by the bag-type dust remover, the air separation cylinder, and the flying dust cover through the exhaust pipe and the ventilation pipe; the air separation cylinder comprises a cylinder body and several pulse nozzles communicated with the cylinder body; the pulse nozzles are respectively communicated with an air inlet of the flying dust cover; and each pulse nozzle is provided with a pulse valve; a high pressure fan is further arranged on the exhaust pipe; a ventilation fan is further arranged on the ventilation pipe. The numerical control pulse blow-cleaning dust removing system and the urban road vacuum sweeper have the technical advantages of being significant in dust removal effect, energy-saving, stable and reliable in use performance, and the like.

The invention relates to an electrolytic cell suitable for pressurizing a circulating pump shell. The electrolytic cell comprises at least one working cavity, a gas-liquid separator and a circulatingpump; the gas-liquid separator is communicated with a hydrogen outlet or an oxygen outlet of the electrolytic cell; the circulating pump is arranged in the working cavity. A working method of the electrolytic cell comprises the following steps: S1, arranging the circulating pump and the gas-liquid separator in the same working cavity; S2, enabling the gas-liquid separator to separate gas output from the electrolytic cell, and enabling the separated gas to be communicated with the interior of the working cavity, so as to form the positive pressure in the working cavity; and S2, conveying an electrolyte to the electrolytic cell by the circulating pump in the positive pressure environment. The circulating pump operates in the positive-pressure working cavity, so that the internal and externalpressure difference of the circulating pump is reduced, the leakage probability of the circulating pump is reduced, the circulating pump operates in the positive-pressure environment, and the circulating pump with a low-pressure-bearing pump shell can be selected.

The invention discloses a blast furnace slag granulation and waste heat recovery system, and relates to the field of blast furnace slag waste heat recovery. The blast furnace slag granulation and waste heat recovery system comprises a blast furnace, a high-pressure slag conveying device, a slag granulation fluidized bed device, a supercritical CO2 recompression power circulation system and a low-temperature slag heat recovery device; the high-pressure slag conveying device is arranged between the blast furnace and the slag granulation fluidized bed device; the slag granulation fluidized bed device is connected with the low-temperature slag heat recovery device; and the supercritical CO2 recompression power circulation system is respectively connected with the slag granulation fluidized bed device and the low-temperature slag heat recovery device. The supercritical CO2 recompression circulation technology is introduced, meanwhile, supercritical CO2 airflow is adopted as a cooling medium, the waste heat recovery efficiency is improved, and meanwhile high-quality slag products are produced.