31results about How to "Prevent temperature deviation" patented technology

The invention relates to a thermal cutting shear and a cutting method thereof, and a flat arrangement type heating mode in fixture bodies is adopted to enhance the heating efficiency and the heat transfer speed and effectively control the operating temperature when the front end of a cutting edge carries out the cutting so as to enhance the cutting quality of the rubber material, and the quality of the joint and the stitching among various materials. The cutting shear comprises a group of the fixture bodies and shear bodies clamped and fixed among the fixture bodies, wherein at least one flat plate type heating plate is lined among the fixture bodies and the bases of the shear bodies; a heat source temperature sensor is arranged in the heating plate and is connected with an external power supply and a temperature control meter through a power supply wire; and a shear body temperature sensor is arranged in the cutting edge part of the shear bodies.

A direct cooling type refrigerator capable of rapidly and accurately controlling the temperature thereof, reducing the ON/OFF time of its compressor, thereby preventing the temperature deviation of its storage compartment from increasing over a predetermined value. The refrigerator includes an outer casing defining an appearance of the refrigerator, an inner casing arranged within the outer casing, and defined with a storage compartment, an insulator interposed between the outer casing and the inner casing, a compressor for compressing a refrigerant, an evaporator arranged to be in contact with the inner casing, and adapted to cool the inner casing in accordance with evaporation of a refrigerant passing therethrough, a temperature sensor provided with a surface contact area closely contacting the inner casing, and adapted to sense a temperature of the inner casing, and a control unit for controlling the compressor in accordance with the temperature sensed by the temperature sensor.

In an exhaust gas control apparatus for an internal combustion engine (1) of the invention, including an exhaust gas control catalyst (8) which purifies exhaust gas released from the internal combustion engine (1), and a fuel supply valve (10) which supplies fuel to a portion upstream of the exhaust gas control catalyst (8), the fuel supply valve (10) is operated such that a cycle formed by combining a fuel supply period in which fuel is supplied from the fuel supply valve (10) and a fuel supply stopped period in which fuel is not supplied is repeatedly performed in order to control the temperature of the exhaust gas control catalyst (8) to the target temperature. The arrangement of the fuel supply period and the fuel supply stopped period is controlled such that the temperature of the exhaust gas control catalyst (8) at each of a starting point (P1) and an ending poring (P3) of each cycle is equal to the target temperature.

The invention discloses an online detection and control experimental device for the welding temperature of an electric resistance welding steel pipe. The online detection and control experimental device is mainly characterized in that the side, facing a high-frequency generator, of the upper portion of a rack is perpendicularly connected with one end of a supporting rod; connecting pieces are connected to the supporting rod at intervals in a sleeving manner; the top of each connecting piece is further provided with an upper screw hole communicating with a middle through hole, wherein a set screw is arranged in the upper screw hole; a connecting lug is arranged below each connecting piece, and a colorimetric temperature measurement device is installed on each connecting piece through the corresponding connecting lug; one set of temperature measuring assembly is composed of one connecting piece, the corresponding set screw, the corresponding colorimetric temperature measurement device, a corresponding bolt and a corresponding nut on the supporting rod, and three to six sets of temperature measuring assemblies are arranged. Each colorimetric temperature measurement device is connected with a computer through a signal line, and the computer is also connected with the high-frequency generator and an output device of the high-frequency generator through a signal line to from a closed-loop control system. According to the online detection and control experimental device for the welding temperature of the electric resistance welding steel pipe, the phenomenon that the temperature for welding the vertex of a V-shaped opening angle is directly measured is avoided, the influences of mist generated by cooling liquid on measurement of the welding temperature are reduced, the welding temperature is accurately controlled, and the quality of the welding pipe is ensured.

The invention discloses a double-inlet and double-outlet coal mill inlet cold and hot primary air mixing system and method, and belongs to the field of energy-saving treatment of power station boilercoal pulverizing systems. The system comprises a coal mill and further comprises a hot primary air main pipe, a cold primary air main pipe, a hot primary air pipe, a hot primary air adjusting baffle,a cold primary air adjusting baffle, a cold primary air pipe, a mixed air pipe, a flow dividing tee joint, a left-side mixed air branch pipe, a right-side mixed air branch pipe, a right-side capacityair door and a left-side capacity air door. By changing the mounting modes of the hot primary air adjusting baffle and the cold primary air adjusting baffle, structurally optimizing the pipeline structure of an airflow mixing part and structurally optimizing the flow dividing tee joint, the problem that the temperature deviation of mixed air at inlets in the two ends of the double-inlet and double-outlet coal mill is large can be thoroughly solved.

The invention discloses a refrigerating system for a refrigerating device. The refrigerating system comprises a compressor, an evaporator and a temperature controller, wherein the temperature controller comprises a temperature sensing bag, an evaporator temperature sensing tube which is arranged on the evaporator, is used for sensing the temperature of the evaporator and is connected with the temperature sensing bag, an outer temperature sensing tube which is used for sensing the temperature in the outer environment of the refrigerating device and is connected with the temperature sensing bag, and a contact sheet, the temperature sensing bag and the contact sheet are connected, and the contact sheet is driven by the temperature sensing bag through the expansion and the contraction to switch on or off the compressor power supply loop of the compressor. According to the refrigerating system for the refrigerating device, control buttons and manual adjustment are not required, temperature control of a refrigerator is completely automatic, the compensation action is played to the changes of environment temperature through the arrangement of the outer temperature sensing tube, the accurate temperature control of the temperature in the refrigerator can be realized, and temperature deviation caused by the manual adjustment is avoided.

The invention relates to a parameter measuring device in petrochemical production process. A device for installing a thermocouple on a reactor in propenoic acid production is characterized in that a short flange tube is arranged on a sealing cover of the reactor; a flange is equipped on the short flange tube; a straight connecting head is arranged on a flange cover; a movable clamping sleeve is arranged on the straight connecting head; the thermocouple is arranged inside the movable clamping sleeve; a fin is arranged on the thermocouple; and a spring is arranged at the lower end of the thermocouple. The device has the advantages of simple structure and easiness in manufacturing, solves the problem that a multi-point thermometer of a propenoic acid oxidation reactor is vertically installed, greatly reduces the difficulty in installing a catalyst, reduces the installation cost and ensures that the installation position of the thermometer is accurate; the temperature detection of the propenoic acid oxidation reactor is reliable and accurate; products in propenoic acid production are good in quality, the conversion rate of the propylene is high, the production in the oxidation process of the propylene is safe, the catalyst is prevented from cocking phenomenon in propylene production, and the service life of the catalyst is prolonged.

The invention relates to the technical field of light aromatic hydrocarbon hydrogenation device, and discloses a light aromatic hydrocarbon hydrogenation transformation device and an operation methodthereof, wherein the device includes a raw material tank; the right side of the raw material tank is fixedly connected with a connecting pipe, the right side of the connecting pipe is fixedly equippedwith a flow control valve, and the right side of the flow control valve is fixedly connected with a through pipe; the right side of the through pipe is fixedly provided with a pre-hydrogenation heatexchanger; the right side of the pre-hydrogenation heat exchanger is fixedly connected with a right-angle pipe; the bottom end of the right-angle pipe is fixedly connected with a deweighting tower. According to the light aromatic hydrocarbon hydrogenation transformation device and the operation method thereof, by arrangement of the pre-hydrogenation heat exchanger, a reboiler and a pressure control valve, the temperature of a light aromatic hydrocarbon material is changed due to heat exchange of the pre-hydrogenation heat exchanger, and the pressure intensity and temperature inside the deweighting tower are controlled by the pressure control valve and the reboiler, so that the light aromatic hydrocarbon material can be separated to obtain light component oil in the deweighting tower, and raw materials are provided for later hydrogenation treatment.

The invention relates to the technical field of liquid heating, and discloses a double-tube heat exchange device which is movably sleeved with a heat conduction device through an adjusting plate and comprises a base, supporting frames are fixedly installed at the positions, close to the two ends, of the top of the base, a shell is fixedly installed at the tops of the supporting frames, and a telescopic power machine is fixedly installed at one end of the outer surface of the shell. An adjusting device is fixedly mounted at one end of an output shaft of the telescopic power machine, penetrates through the shell and extends into the shell, and a limiting sleeve is fixedly mounted at one end of the inner wall of the shell, so that liquid entering from a liquid guide flange opening cannot enter a containing cavity in the left side of the sealing plate under the common sealing effect of the sealing plate and an adjusting plate; therefore, the bending positions of the heat exchange tubes cannot be in contact with the liquid, and the problem that the temperature of the finally flowing-out liquid deviates due to uneven heat conduction caused by different total contact areas of the heat exchange tubes at different positions in the shell and the liquid due to different bending radiuses is solved.

The invention discloses a method and a device for controlling the opening degree of an external bed ash control valve. The method comprises the following steps: determining the target value of the heat absorption capacity of a heated surface, corresponding to the ash inlet amount of an external bed, according to the actual load of a boiler; and adjusting the opening degree of the external bed ashcontrol valve to make the actual value of the heat absorption capacity of the heated surface reach the target value of the heat absorption capacity of the heated surface. The heat absorption capacityof the heated surface can be used as the target value of the opening degree control of the external bed ash control valve in order to reduce a steam temperature deviation caused by a bed temperature measurement error or a tail flue gas flow deviation.

The invention relates to the technical field of polymer material aging life testing, in particular to an oven and a system and method for automatically measuring the thermo-oxidative aging life of a polymer material. An oven body is internally provided with a heating device, the heating device can heat and age a sample placed on a sample frame, and a camera is used for shooting the sample; an identification model is utilized to judge whether the sample is aged and invalid according to the shot sample picture, frequent box opening sampling is avoided, the working efficiency is improved, temperature fluctuation in the oven caused by frequent box opening is avoided, the test stability is improved, and the reliability of automatic measurement of the thermo-oxidative aging life of the polymer material is improved.

The invention relates to a device for measuring a melt heat history curve under action of pulse magnetic liquid level oscillation, and belongs to the technical field of material machining. The device is mainly composed of a pulse power supply, a mosquito-repellent incense type induction coil, an electric heating wire, a lifting rod, a ceramic tube and a plug, wherein the electric heating wire is connected with a 220V alternating current through the plug, the mosquito-repellent incense type induction coil is connected with the pulse power supply, and a casting mold containing a metal block is placed on the lifting rod. Firstly, the electric heating wire heats to melt the metal block, then, the lifting rod ascends, the casting mold is close to the mosquito-repellent incense type induction coil, the mosquito-repellent incense type induction coil exerts pulse magnetic liquid level oscillation processing on the metal melt, a thermoelectric coupler is inserted into the melt and is fixed, and the melt heat history curve is measured. Compared with a traditional temperature measuring method, the casting process is removed, the melt heat history curve can be more stably and accurately measured, and the reliable temperature data are provided for obtaining a pulse magnetic liquid level oscillation refined metal solidification structure.

The present invention relates to an apparatus for heat treatment, comprising: a first straight furnace and a second straight furnace respectively, having an input end unit and a discharge end unit; an infinite orbit connected by penetrating the first straight furnace and the second straight furnace; one or more bogie which passes through the first straight furnace and the second straight furnace by moving along an infinite orbit to load the materials to be treated; and a gas supply unit connected to the bogie to supply gas. As an area, to which an unnecessary quantity of heat is supplied, is able to be removed; the thermal energy is able to efficiently be used. The temperature deviation is able to be prevented, and the quality of the products is able to ultimately be improved.

The invention relates to a cold and hot primary air forced mixing system and method for inlets of a double-inlet and double-outlet coal mill, and belongs to the field of energy-saving treatment of power station boiler pulverizing systems. According to the requirement of the installation mode of a hot primary air adjusting baffle and a cold primary air adjusting baffle, the transverse flow field of air flow can be kept uniform; by using a multi-layer cold primary air distribution device at the cold primary air tail end, cold primary air and hot primary air are intensively mixed; and through the design of flow guide plates and cold primary air corner flow guide plates in the system and the use of a flow distribution tee joint middle partition plate, the local flowing resistance of the air flow is reduced, and the stability of the flow field can be kept. The system is simple and reasonable in design, safe and reliable, the cold primary air and the hot primary air are intensively mixed, the stability of the flow field is kept, and the problem that the air temperature deviation of the inlets in the two ends of the double-inlet and double-outlet coal mill is large can be thoroughly solved.