55 results about "Swelling pressure" patented technology

An object of the present invention is to provide a water absorbent having excellent gel properties and showing excellent properties when used in a water-absorbing material of a sanitary/hygienic material such as paper diaper. Moreover, another object of the present invention is to provide a water absorbent which is safe and excellent in liquid permeability, and in which an amount of liquid permeability improver for improving the liquid permeability is reduced. The water absorbent is made from a water-absorbing resin prepared by a specific polymerization method and having a high degree of cross-linking, a high liquid holding property and a high gel strength (its swelling pressure of gel layer of is 35 kdyne/cm2 or more). This water absorbent is further processed to have a particular particle size distribution (95 wt % or more of its particles are less than 850ƒÊm but not less than 106ƒÊm, and logarithmic standard deviation (ƒĐƒÄ) is in a range of 0.25 to 0.45) and then surface cross-linked. After that, a liquid permeability improver is added therein.

The intervertebral disc contains no blood vessels. Nutrients and waste are diffused mainly through adjacent vertebral bodies. As we age, calcified layers form between the disc and vertebral bodies, blocking diffusion. The disc begins to starve and flatten. The weight shifts abnormally from disc to the facet joints causing strain and back pain. Under anaerobic conditions, lactic acid is produced causing acidic irritation and unspecific pain. A U-shaped disc shunt is delivered into and sealed within the degenerated disc simply by needle puncturing and withdrawal, to draw nutrients from bodily circulation into the avascular disc. A continual supply of nutrients increases biosynthesis of the water-retaining sulfated glycosaminoglycans, hence swelling pressure within the disc. The weight is re-shifted from the facet joints to the regenerated disc, alleviating back pain. With oxygen transported through the shunt, anaerobic production of lactic acid is minimized. In addition, the residual lactic acid is expelled through the U-shaped shunt during disc compression into bodily circulation to alleviate unspecific pain.

A high strength hydrogel having a constant swelling pressure upon implantation and thereafter is formed by preparing a hydrogel solution and then injecting the solution into a mold and cause to gel. The molded gel is then washed in a saline solution from about one day to twelve weeks, after which the gel is irradiated for sterilization purposes, dehydrated and packaged. The pre-treatment with the use of a physiologic solution results in an implant which exhibits a constant swelling pressure profile after implantation.

The invention provides a testing system for measuring static cracking agent swelling pressure and a testing method thereof, belonging to the technical field of geotechnical engineering. According to the system, a pressure testing machine rigid frame is provided with a pressure sensor, a barrel, a first piston and a second piston are arranged between a pressing head and the pressure sensor, the second piston is in contact with the pressing head, and the first piston is in contact with the pressure sensor. The testing method comprises the steps of placing the first piston into the bottom of the barrel and placing the barrel on the pressure sensor, loading a static cracking agent into the barrel and leveling the agent and then covering the barrel with a plastic film, placing the second piston into the barrel, starting a pressure testing machine and driving the pressing head to move downward through an oil cylinder such that the pressing head is in contact with the second piston, with the volume swelling of the static cracking agent, axially pushing the first piston and the second piston with the agent and recording a numerical value of swelling pressure with the pressure sensor, and dividing the numerical value of the swelling pressure with the cross section area of the first piston or the second piston to obtain the value of the static cracking agent swelling pressure.

The present invention relates to swelling pressure testing method and device for static rupturing agent. The measured static rupturing agent is set inside blast hole with radial rigid constraint and only axial swelling and displacement produced, and the swelling pressure is measured directly with dynamometric ring in the blast hole mouth. The measuring device consists of rigid frame, dynamometric ring, micrometer, blast hole mold and platform elevation controlling system. The blast hole mold and the dynamometric ring are set inside the rigid frame capable of being elevated and in the same symmetrical central axle, and the blast hole mold with blast hole is set on the rigid frame platform. The present invention can obtain intuitive and accurate measurement result.

The invention relates to an agglomerate containing at least one of the following water-soluble or water-dispersible materials as a bonding base polymer: carboxylized and/or alkoxylized starch, cellulose ether and fully synthetic vinyl polymers and/or polyacrylates. The agglomerate is characterized in that it contains a blasting agent which produces a high swelling pressure, but, advantageously, does not gel. The agglomerate can have a regular geometric form or not. Its weight should be between 0.5 and 500 g. The agglomerate is used in particular in the production of lump-free paste.

A method for dynamic water feeding and hole sealing using high water-absorbent resin is applicable to sealing of a borehole on which extraction has a great impact. Two ends of a hole-sealed section of the borehole are sealed. Fine mixed high water-absorbent resin powder wrapped in a piece of cotton cloth is disposed in the hole-sealed section of the borehole, a water injection pipe and a gas extraction pipe are inserted in the borehole, and an automatic feed water valve is used to inject water into the hole-sealed section. The fine mixed high water-absorbent resin powder that fills the hole-sealed section and surrounding cracks with the water flow rapidly swells up after soaking up water to fill the hole-sealed section, and maintains at a swelling pressure. After the powder swells up and hole sealing is completed, the extraction pipe is connected to an extraction apparatus to perform gas extraction. This method has advantages such as tight hole sealing, high automation degree, and dynamic hole sealing, thus effectively solving problems that pores around the borehole are poorly sealed, it is difficult to seal cracks newly produced by extraction and so on. Moreover, the powder for hole sealing is low in price, and therefore the hole sealing cost is low.

The invention relates to a waste steam, condensate water and cooling water regenerating device of a thermal power plant and a nuclear power plant. The device provided by the invention is characterized in that after steam drives a turbine to generate power, the swelling pressure of the turbine is reduced, but the steam quality of the turbine is not reduced; the waste steam is pressed into a platform with a certain height relative to the ground through a pipeline under 3 to 4 atmospheric pressures (while the higher height is better but according to actual conditions); after being cooled through a highly vacuum condenser, the waste steam is changed into liquid water at a temperature of about 40 DEG C; after being exhausted and stored into an upper water storage tank at the lower part, the liquid water leaks downwards through a pressure pipeline to drive the turbine; the turbine drives a generator to generate the power; the cooling water is lifted to the height which is the same to the condenser through a circulating water pump; the waste heat is taken away by the condenser; after being exhausted and stored into another upper water storage tank at the lower part, the waste heat leaks downwards through the pressure pipeline to drive the turbine; and the turbine drives the generator to generate the power (while the cooling of the condenser is divided into water cooing and air cooling, if the air cooling is adopted, a cooling water generating device is not provided).

The invention specifically relates to an apparatus and method for testing the swelling pressure and saturated infiltration performance of a buffer material, belonging to the field of experimental study of the swelling and infiltration of buffer materials used for geological disposal of high-level waste. The objective of the invention is to provide the testing method capable of acquiring the swelling and infiltration performance parameters of the buffer material bentonite and providing a parameter basis for barrier design of deep geological disposal repositories and projects of high-level wasteso as to overcome disadvantages in the prior art. The method has the following beneficial effects: (1) the swelling pressure of the bentonite under a constant-volume condition can be measured; (2) the swelling pressure and saturated infiltration performance of a sample under different temperature and exhausting conditions can be tested; and (3) the swelling pressure and infiltration coefficient of a same sample can be carried out at the same time, operation is convenient, measurement is fast, and test results are high in precision.

The invention discloses a seepage prevention structure and method for a periphery of a floor-passing-through pipeline. The seepage prevention structure for the periphery of the floor-passing-through pipeline comprises a concrete floor, the floor-passing-through pipeline, and a special hole plugging template, wherein a reserved hole is formed in the concrete floor; the floor-passing-through pipeline passes through the reserved hole of the concrete floor and is positioned in the middle of the reserved hole of the concrete floor; the special hole plugging template is clamped on the floor-passing-through pipeline and positioned on the bottom surface of the concrete floor; the seepage prevention structure further comprises a water swelling strip; the water swelling strip is wound on the periphery of the floor-passing-through pipeline and positioned at 1/2 of the floor thickness of the concrete floor. According to the invention, the adopted water swelling strip has a water swelling function, is arranged in a concrete joint, where water prevention is required, and swells fast gradually with the passage of time, and a concrete joint can have a sealing water stopping effect after being subjected to swelling pressure of the water swelling strip, so that when the seepage prevention structure is used for periphery seepage prevention of the floor-passing-through pipeline and a pipeline sleeve, a better effect is achieved.

The invention discloses a drilling fluid, a preparation method and an application. The drilling fluid is prepared from the following components in parts by weight: 100 parts of water and 0.5-5 parts of a shale inhibitor, wherein the shale inhibitor is 1-aminoethyl-3-methylimidazolium salt with structural formula shown in the description, R is R is Br, NO3, PF6 or BF4. The drilling fluid contains the shale inhibitor capable of effectively inhibiting shale hydration dispersion, and can effectively prevent surface hydration of montmorillonite in shale when being used for drilling large sections of shale formations prone to wellbore instability, so that shale swelling pressure is reduced, and wellbore stability is maintained.

The invention provides an axial loading system and a loading method and belongs to the technical field of geotechnical engineering. A first piston and a second piston are arranged in a pipe barrel, a swelling agent is arranged between the first piston and the second piston, the pipe barrel is arranged between a loaded body and a pressure sensor, the second piston is in contact with the loaded body, the loaded body is in contact with a rigid frame body, the first piston is in contact with the pressure sensor, and the pressure sensor is in contact with the rigid frame body. The loading method comprises the following steps that: the pressure sensor is arranged on the rigid frame body; the first piston is arranged in the bottom of the pipe barrel, and the pipe barrel is arranged on the pressure sensor; the swelling agent is filled into the pipe barrel, and a plastic film covers the swelling agent after the swelling agent is tamped to be smooth; the second piston is put in the pipe barrel, and the loaded body is arranged on the upper surface of the second piston; along with the swelling of the volume of the swelling agent, the swelling agent can axially push the first piston and the second piston, and the pressure sensor can be used for recording a value of swelling pressure applied to the loaded body and transferring the value to a statical strain indicator.

The invention relates to a sealing membrane which is useful for closing out liquids and comprises moisture-absorbing, swellable fibres capable of generating a high swell pressure. The sealing membrane is constructed as a textile layer and may be disposed on the back of a moisture-impermeable layer of material of construction.

The invention relates to a solid preparation swelling pressure determination device and method. The solid preparation swelling pressure determination device comprises a fixing base, a height adjusting structure, a mold, a probe and a pressure receptor, the probe is matched with the inner diameter of the mold, the mold is fixedly connected with the fixing base through the height adjusting structure, the pressure receptor is fixedly connected with the fixing base, and a water permeable structure is further arranged at the top of the mold, fixedly connected with the mold through a locking structure, formed by a water permeable film and a water permeable gasket or only formed by the water permeable gasket. The solid preparation swelling pressure determination method includes the following steps: (1) selecting the mold and the probe, and measuring the contact area S between a sample and the probe, (2) assembling the sample, (3) conducting zero setting, (4) setting the initial pressure F0, and (5) adding water, conducting zero setting on the pressure receptor, recording displayed numbers F of the pressure receptor at different time points, and calculating the corresponding swelling pressure P according to P=F/S to obtain the t-P curve. The determination device and method are high in sensitivity and easy and convenient to operate, and has the good scientific research and economic value.

The invention relates to a static breaking agent and a preparation method thereof and belongs to the technical field of construction. According to the invention, the crystal size of over-sintered limeis regulated through high-temperature sintering; ferric oxide is doped into the over-sintered lime in the sintering process; the ferric oxide and the calcium oxide form gel and generat C2F under hightemperature condition; C2F is an ore with lower hydration reactivity and is capable of slowly reacting with water; the formed calcium oxide crystal is wrapped by a liquid phase formed under high temperature, so that the hydration speed of the breaking agent is reduced, the setting time is prolonged and the swelling pressure is increased and becomes slow; a heat conducting agent is added for releasing a large amount of heat generated by hydration and the high-temperature orifice spraying phenomenon is improved. According to the invention, the degree of bonding with over-sintered lime is enhanced by a coagulation hardening agent and a coagulation enhancing agent, the consistence of the hardening speed and swelling pressurizing speed is guaranteed and the static breaking agent is high in swelling power, safe, adaptive to various climatic conditions, capable of properly regulating the cracking time of the broken matter and low in cost.

The invention discloses a swelling pressure forming and manufacturing method of a zirconium corrugated pipe. In a process of manufacturing the zirconium corrugated pipe, two times of thermal treatment and temperature swelling pressure formation are adopted, wherein a temperature swelling pressure formation process adopts heating swelling pressure formation. Before and after the zirconium corrugated pipe is subjected to swelling pressure formation, a stress-relief heat treatment procedure is reasonably increased, crests and troughs of the formed zirconium corrugated pipe are in smooth transition without corner angles, and materials uniformly extend and are better in plasticity. A special swelling pressure formation device and a heating device in a swelling pressure formation process are designed, and a proper swelling process method is selected, thus the formed zirconium corrugated pipe is more accurate in size and higher in yield. The swelling formation quality of a zirconium corrugated pipe blank is optimized through reasonably selecting a welding method and a welding parameter and carrying out cleaning treatment before welding, thus the problem of sensitivity of a zirconium material to impurities is effectively reduced.

The invention relates to the technical field of medical composite films, in particular to a long-acting controlled release composite film with a gel-state pressure transmission control layer. The long-acting controlled release composite film comprises a controlled release composite support and a microchannel transmission layer arranged at the bottom of the controlled release composite support, wherein the controlled release composite support is sequentially divided into an interpenetrating network micro-scaffold structure layer, a swelling microgel pressure transmission control layer and a restrictive pressure transmission control layer which are arranged from the inside out. A preparation method of the long-acting controlled release composite film comprises the following steps: preparation of a swelling pressure control microgel, preparation of a swelling pressure control microgel, liquid viscosity improving and structural strengthening of the microgel, preparation of an interpenetrating structural body, immobilization of the interpenetrating structural body, packaging of a pressure control tank, and procedure simplification. The preparation method is suitable for continuous automatic manufacture; the characteristics of air permeability, moisture permeability and the like ensure that a wound is in a favorable cell growing and healing environment; and besides, as a dressing istransparent, the wound healing situation can be favorably observed directly, and accordingly, the wound therapy condition can be controlled.

The invention discloses a continuous reducing die for swelling-pressure-formed axle housings of small and medium-sized automobiles. The continuous reducing die is installed on a three-way hydraulic machine. On the three-way hydraulic machine, slide blocks drive an upper die I and an upper die II to move and clamp the middle portion of a pipe blank together with a lower die I and a lower die II. A left slide block and a right slide block of the three-way hydraulic machine drive a left reducing female die I, a right reducing female die I, a left reducing female die II and a right reducing female die II to move. A left central piston and a right central piston in the left slide block and the right slide block drive a left mandrel I, a right mandrel I, a left mandrel II and a right mandrel II to move. By means of central key guide plates which are arranged on a left bearing plate and a right bearing plate and central keys which are arranged on a lower die plate, a left mandrel fixing plate and a right mandrel fixing plate, it is ensured that the middle portion of the pipe blank is coaxial with the left side and the right side during reducing of a first station and a second station. By means of the reducing die, two passes of reducing including first-time reducing and second-time reducing can be completed on the same die at the same time. By means of the continuous reducing die, the production efficiency can be improved by nearly 50%, the manufacturing cost is remarkably reduced, and meanwhile the continuous reducing die has the beneficial effects that the reducing deformation amount of each single pass is large, the mandrels are convenient to replace and the wall thickness of the pipe blank subjected to reducing is easy to control.

The invention discloses a self-expandable microgel pulse preparation with layer-by-layer assembled polyelectrolytes and a preparation method thereof. The preparation consists of a self-expandable microgel nucleus and a polyelectrolyte coating layer and has the particle size of between 100 nanometers and 600 mu m, wherein the self-expandable microgel nucleus mainly comprises chitosan and sodium alga acid; and the polyelectrolyte coating layer consists of a 4-sodium styrene sulfonate layer and a poly(allylamine) hydrochloride layer which are arranged alternatively. The preparation is a pulse preparation under the coaction of system degradation and swelling pressure, releases a property which is fully dependent on the structure of the preparation and a high polymer material and has high time lag controllability. After administration, a large number of medicaments are released after a time lag period in which the medicaments are not released. An experiment indicates that the pulse preparation has low tissue stimulation, high safety and accurately-controllable core particle size, and uses cheap and readily available materials; moreover, chitosan sodium alga acid microgel has certain pH sensitivity, so that the releasing action of the preparation is more flexible and controllable.