43results about How to "Avoid pressure instability" patented technology

The invention discloses a pressure stabilizing type non-negative pressure water supply system which comprises a water inlet pipe, a water inlet pipe pressure stabilizing device, a water supply power combination device and a water supply pipe. The water inlet pipe pressure stabilizing device is integrally arranged on the water inlet pipe communicated with a municipal tap water pipe, and the water inlet pipe is supplied to all users after being treated and pressurized by the water supply power combination device; the water inlet pipe pressure stabilizing equipment comprises a high-level water tank, a hydraulic cylinder and a pressurizing barrel, the high-level water tank is communicated with the water inlet pipe through an L-shaped pipe, a water replenishing valve is arranged on the L-shapedpipe, the bottom of the high-level water tank is communicated with the pressurizing barrel through a folding pipe, a first electromagnetic control valve and a third check valve are arranged on the folding pipe, and a liquid level sensor is arranged in the high-level water tank; and an output shaft of the hydraulic cylinder is fixedly connected with a piston in the pressurizing barrel, the bottomend of the pressurizing barrel is communicated with the water inlet pipe through a pressurizing pipe, and a second electromagnetic control valve and a fourth check valve are arranged on the pressurizing pipe.

The invention discloses an electrical impedance imaging method, and belongs to the technical field of electrical impedance scanning and imaging. The method disclosed by the invention comprises: step 1, respectively arranging a first electrode device and a second electrode device contacting with the surface of an object to be imaged at the two opposite sides of the object to be imaged, and enabling the first electrode device and the second electrode device to apply a constant clamp force onto the object to be imaged; step 2, applying an input electric signal via the first electrode device, acquiring the output electric signal of the second electrode device, and obtaining the current distribution of the object to be imaged under the clamp force; step 3, changing the clamping forced applied on the object to be imaged by the first electrode device and the second electrode device, and repeating the step 2; and step 4, constructing the impedance image of the object to be imaged according to the current distribution difference value of the object to be imaged between two different clamp forces. Compared with the prior art, the method disclosed by the invention has the advantages of higher sensitivity, good electrode contact antifact inhibition effect, and low implementation cost.

The invention discloses anti-corrosion secondary water supply non-negative pressure equipment. One end of a water conveying pipe is connected with a treatment tank; a granular activated carbon filterscreen is fixedly mounted at the top of a treatment tank; an annular fixing frame is fixedly connected to a position, which is located below the granular activated carbon filter screen, in the treatment tank; an annular fixing groove is formed in the bottom end of the annular fixing frame; an ion exchange resin filter element is mounted in the middle of the treatment tank; and the top end of the ion exchange resin filter element is fixedly connected with an upper mounting block. The structure is scientific and reasonable, the equipment is safe and convenient to use, by using the ion exchange resin filter element, free anions and cations in the water are removed, the pH value of water is reduced, corrosion of water to the equipment is reduced, water in the equipment will not be polluted bythe rusts, chlorides in the water can be absorbed by using the granular activated carbon filter screen, and the probability that the equipment is corroded is further reduced.

The invention relates to a demoulding device for a thin-wall deep-drawing part process. The demoulding device mainly comprises a discharging ring (2), a material guiding barrel (3) and a thread check ring (4) which are sleeved sequentially from top to bottom, wherein a rubber ring (6) is hooped in a U-shaped slot of the discharging ring (2) for fixing; a spring (7) is arranged on the thread check ring (4) and is used for supporting the material guiding barrel (3); a taper hole seat (1) is used for sleeving the components; and a thread is matched with the thread check ring (4). The demoulding device is characterized in that: a step-shaped structure (13) is arranged at the position, which is close to the upper port, on the inner wall of the discharging ring (2) to form an inner flange (14) and an auxiliary support surface (15). Due to the adoption of the unique design of spliced discharging blocks and the inner flange, the demoulding device can obviously reduce the demoulding difficulty of 500ml-steel cans and can effectively prevent the openings of the cans from being pressed and destabilized in the demoulding process.

The invention relates to environmental protection equipment, particularly relates to equipment for recycling combustible gas generated from cracking of rubber, and specifically discloses a device for recycling gas generated from cracking of waste tyres. The device comprises a combustion furnace, a cracking furnace, a connecting pipe and electronic control devices, wherein a gas collecting device and a gas purifying device are connected with the cracking furnace; the gas collecting device comprises a gas storage tank and a buffering tank; a gas inlet of the gas storage tank is connected with the cracking furnace, and a gas outlet of the gas storage tank is connected with an exhausting device and the gas purifying device by a three-way joint; a total-pressure fan and the buffering tank are connected with the gas purifying device; a gas outlet of the buffering tank is connected with the combustion furnace; the electronic control devices are arranged in the total-pressure fan of the gas storage tank and the buffering tank. The gas recycling device has the advantages that the compositional structure is simple, the equipment investment is low, and a desulfurizing tower, the high-pressure fan and the buffering tank only need to be added into existing equipment; the use effect is obvious, and not only can the capital investment of the combustion furnace be saved, but also the combustion effect is good.

The invention provides an L-shaped light-steel frame, an L-shaped light-steel assembled composite wallboard and an installation method thereof. The L-shaped light-steel frame serves as a connecting part for corner turning and connection of wall bodies of an assembled house, so the problems of connection structures and wall body structures are well solved. The L-shaped light-steel frame comprises a first frame and a second frame perpendicular to each other, wherein an outer frame comprises M-shaped steel and corner square steel, horizontal C-shaped steel is arranged inside, and diagonal bracings adopt C-shaped steel to improve the stability and shear resistance; the wallboard fills the light-steel frame through a sandwich insulating layer to insulate heat and prevent the light-steel frame from being deformed; the light-steel frame is added with external maintenance boards to improve the horizontal shear resistance, crack resistance and impact resistance of the wall bodies; the vertical connection between the wall bodies and mainboards is realized through turnbuckles and sleeves on the outer frame of the light-steel frame, so as to connect the wall bodies of upper and lower layers to form an integral body and reinforce the reliability of connection between the wallboards and the mainboards. According to the L-shaped light-steel frame, the L-shaped light-steel assembled composite wallboard and the installation method, the assembly level is high, the industrial production is facilitated, the functions of heat insulation and structure connection are integrated, the safety and reliability are high, the construction is facilitated, and the cost is lower.

The invention relates to a shield segment and a construction method thereof, in particular to a segment form for preventing upward floating of a shield tunnel and a construction method of the segmentform. A plurality of segment ring units are sequentially arranged in the extending direction of the shield tunnel, and each segment ring unit is formed by a plurality of segments which are spliced andenclosed, wherein one of the segments serves as a top sealing segment; and the top sealing segments are provided with grouting holes correspondingly, and two anti-floating pieces are mounted every the top sealing segment of the corresponding segment ring unit correspondingly, wherein the two anti-floating pieces are each in an arc shape and are arranged above the top sealing segment along the vertical central axis of the corresponding segment ring unit in a bilateral symmetry mode, the inner surfaces of the two anti-floating pieces face the corresponding top sealing segment, and the two anti-floating pieces are connected with the corresponding top sealing segment through one or more supporting screws, wherein the supporting screws and the corresponding top sealing segment are in screwingfit, and the outer ends of the supporting screws are in supporting fit with the corresponding anti-floating pieces. The anti-floating pieces act on a tunnel initial lining, the constraint effect is generated, upward floating of the segments is effectively controlled, and easiness and effectiveness are achieved.

The invention provides a T-shaped light-weight steel frame, a T-shaped light-weight steel assembling type compound wall plate and an installation method thereof. The T-shaped light-weight steel frame is used as a connection part of a wall body corner of an assembling type room in a connecting process, and connection construction and structure problems are solved very well. The T-shaped light-weight steel frame comprises a first framework and a second framework, which are vertical to each other; an outer edge frame is made of M-shaped steel and the interior is made of C-shaped steel; the outer edge frame is connected by a C-shaped connection part through a self-tapping screw; the wall plate is filled into the light-weight steel frame through a sandwiched heat insulation layer and is used for keeping heat and limiting the deformation of the light-weight steel frame; horizontal anti-shearing, anti-cracking and anti-impact performances of the wall body are improved through the light-weight steel frame and an external maintenance plate; vertical connection between the wall body and a main plate is realized through a turn buckle of the outer edge frame of the light-weight steel frame and a sleeve, so that the wall bodies of the upper and lower layers are connected to form a whole body, and the connection reliability of the wall body and the main plate is enhanced. The T-shaped light-weight steel frame is high in assembling degree, is suitable for industrial production, and integrates heat insulation and structure; the connection structure is safe and reliable, is easy to construct, mount and replace and is relatively low in cost.

The invention discloses a full-prefabricated light steel assembled type composite wall plate capable of loading the weight and a manufacturing method thereof. The wall plate comprises light steel composite wall plate bodies, a transition supplementing plate, an upper U-shaped guide rail, a lower U-shaped guide rail, an aslant pull steel belt, a pull-resistant connecting piece and a fixed steel belt; the light steel composite wall plate bodies are fixedly connected with the lower U-shaped guide rail fixed to the building ground and the upper U-shaped guide rail fixed to the building beam through grooves and tongues, and the pull-resistant connecting piece is connected and fixed between two adjacent standard light steel composite wall plate bodies through tapping screws; the standard light steel composite wall plate bodies are connected and fixed by the fixed steel belt through two rows of tapping screws along the grooves and tongues of the two light steel composite wall plate bodies; the transition supplementing plates are defined in the upper U-shaped guide rail and the lower U-shaped guide rail through the grooves and tongues. According to the full-prefabricated light steel assembled type composite wall plate capable of loading the weight and the manufacturing method thereof, the overall stability and lateral-resistant rigidity of the wall body are improved, the installation precision and the structural integrity of the wall body are improved, the shear-resistant effect and the pull-resistant force among the building grounds are strengthened.

The embodiment of the invention provides an air tightness detection system and an air tightness detection method, and belongs to the technical field of detection. The air tightness detection system comprises a heating unit used for heating a first device to be detected, a first buffer device, and a second buffer device, one end of the first buffer device is connected with a first end of the first device to be detected through a first pipeline; a first pressure detection unit used for detecting the pressure in the first pipeline; and a pressure adjusting unit connected with the other end of the first buffer device through a second pipeline, wherein the first buffer device is used for preventing convection between the first pipeline and the second pipeline. According to the technical scheme provided by the invention, the problem of unstable pressure caused by severe convection between high-temperature gas and low-temperature gas can be prevented by adopting the first buffer device, so that the accuracy and the reliability of a test result of an air tightness detection test under a high-temperature condition can be improved.

The invention discloses a cotton picker cleaning device. The cotton picker cleaning device comprises a water tank, a conveying channel and a power assembly. The water tank comprises a water outlet anda water return port. The conveying channel comprises a water outlet pipe connected with the water outlet, and a water return pipe connected with the water return port. A distributor is connected between the water outlet pipe and the water return pipe. The power assembly is connected with the water outlet pipe and located between the distributor and the water outlet. The distributor is provided with a water spray pipe spraying a spindle assembly. The distributor is provided with a pressure sensor for detecting water pressure in the distributor. The water return pipe is provided with a first control valve for controlling flow of the water return pipe. The opening and closing degrees of the first control valve are adjusted according to detected numerical values of the pressure sensor, thus,the amount of water flowing back into the water tank is adjusted, that is, the water pressure in the distributor is adjusted, so that the water pressure in the distributor and the water pressure of water flowing out of the water spray pipe are kept at certain values, and the cleaning device works stably; and the invention further discloses a cotton picker comprising the cotton picker cleaning device.

The invention discloses a device for pressing a puncture site after cerebral vascular intervention operation. According to the key points of the technical scheme, the device includes a pressing memberand a fixing device, the pressing member includes a pressing shell and an elastic pressing pad, the pressing shell and the elastic pressing pad are enclosed to form a first filling inner cavity, a first filling machine is arranged outside the pressing shell, pressure gauge is arranged on the pressing shell, a blocking plate is slidably connected to the sliding shell, a limiting structure is arranged on the pressing shell, the first filling machine includes a first filling airbag, an inlet through hole and a discharge through hole are formed in two sides of the first filling airbag, a first check valve is installed on the inlet through hole, a second check valve is installed on the discharge through hole, an outlet of the second check valve communicates with the first filling inner cavitythrough a first connecting pipeline, a first discharge channel is arranged on the pressing shell, and a control valve is arranged on the first discharge channel. The device can control the pressing range, adjust the pressing position and control the pressing pressure, can convenient perform cold compress or hot compress operation, and reduces the workload of staff.

The invention discloses a pressure bandage special for breast surgery and a using method thereof. The pressure bandage comprises a bandage body, a pressurizing belt, a macromolecule pressurizing bag and a cleavage filling fixing bag, wherein the pressurizing belt and the cleavage filling fixing bag are fixed to the bandage body; shoulder straps are symmetrically arranged on the bandage body, and azipper is arranged in the middle of one face of the bandage body; supporting memory strips are arranged on the two sides of the bandage body; a plurality of first four-claw clamping slots are symmetrically and fixedly arranged on the bandage body and located on the two sides of the zipper; first four-claw buckles are symmetrically and fixedly arranged in the middle of the pressurizing belt; the middle of the pressurizing belt and the middle of the bandage body are fixedly connected in a matched mode through the first four-claw clamping slots and the first four-claw buckles; a through hole isformed in one side of each four-claw clamping slot; fixing buckles and rotary tightening buckles are symmetrically arranged on the two sides of the bandage body; adjusting pull ropes are arranged between the fixing buckles and the rotary tightening buckles in a penetrating mode, and the adjusting pull ropes are arranged in a staggered mode. The device achieves the effect of point pressurization ata wound position.

The invention relates to a turbocharger actuator calibration detection structure which comprises a turbocharger complete machine, a valve is installed in an air channel of the turbocharger complete machine, the opening amplitude of the valve is controlled by a valve rod, one end of the valve rod is connected with the upper portion of a transmission plate, and a transmission pin is installed on thelower portion of the transmission plate. The turbine comprises a pressing shell, a tail gas outlet is formed in the pressing shell and connected with a bypass valve gas pipe, the bypass valve gas pipe is of a three-way structure, the gas inlet end of the bypass valve gas pipe is connected with the tail gas outlet, the first gas outlet end of the bypass valve gas pipe is connected with gas pressure physical detection equipment, and the second gas outlet end of the bypass valve gas pipe is connected with the gas input end of gas pressure electronic detection equipment. The gas output end of thegas pressure electronic detection device is connected with the input end of the bypass valve, and the outer side of the pull rod is connected with one end of the adjusting sleeve. The turbocharger actuator calibration detection structure is simple in structure and small in occupied space; the calibration of the equipment detection pressure electronic device adopts a correction method compared with an atmospheric pressure mercury column, so that the pressure instability or the pressure instrument failure can be effectively prevented.