55 results about "Capillary length" patented technology

The invention provides a gallium-based liquid alloy-based sphygmomanometer and a blood pressure calibration method, which relate to the technical field of medical equipment, and specifically use a gallium-based liquid alloy column as a pressure-sensitive liquid for blood pressure testing to measure the blood pressure of a human body; The capillary length cooperates with the pressure control chamber to control the pressure of the sphygmomanometer, realizes the precise control of the gallium-based liquid alloy column, improves the measurement accuracy and shortens the length of the glass capillary while preventing the gallium-based liquid alloy from being oxidized; the sphygmomanometer and the The proposal of the blood pressure calibration method can greatly reduce the society's dependence on harmful mercury metals, solve the problems of poor measurement accuracy of electronic thermometers, and is expected to be greatly popularized and applied.

The invention discloses an air conditioning throttle pipe for domestic use, comprising a left movable block and a right movable block which are arranged in a metal pipe. A fixed block is arranged between the left movable block and the right movable block. A left stopping block is arranged outside the left movable block, and a right stopping block is arranged outside the right movable block. The left and the right stopping blocks are fixed on the internal wall of the metal pipe. The left and the right movable blocks are provided with movable block capillary small holes which penetrate through the axes thereof. The fixed block is provided with a fixed block capillary small hole which penetrates through the axes thereof and is corresponding to the positions of the movable block capillary small holes. The fixed block is also provided with a plurality of axial directional overflow holes. The left movable block can slide between the left stopping block and the fixed block. And the right movable block can slide freely between the right stopping block and the fixed block. The fixed block is made by multilayer metal sheets, forming into an integrative whole body. The left and right stopping blocks are made by copper or aluminum or steel or iron, and are ring-shaped or comprise a plurality of semi-rings. The air conditioning throttle pipe has the advantages that the air conditioning throttle pipe has more reasonable structure, is favorable to meet the length requirement of the capillary tube needed when refrigerating and heating, can debase the consumption of refrigerant and energy, and can improve the quality and functions of products.

The present invention discloses a glass capillary and its preparation method. The method is: divide the glass rod into two half of the round stick, and the semi -circular sticks are produced on the semi -round sticks that meet the design requirements of the design requirements;The geometric center of the groove makes the first cold machining of each circular rod into a combination stick; arranges several first glass tubes, combined sticks, and second glass tubes to make glass capillary embryos;The capillary embryo is controlled and pulled into a glass capillary long blank; according to the product requirements, the glass capillary length of the glass is made of second cold processing into the finished product of the glass cap.The glass capacity preparation method provided by the present invention is simple. The combination rod composed of the first glass tube, the two -half round rods, and the second glass tube can achieve a good contraction and combination, and the slot spacing and slot size accuracy is high to avoid quality defects.Realize the preparation of low -cost, high -precision, high -efficiency glass hair tube.

The invention discloses an easily-adjusting and easily-measuring high-precision closed type constant-pressure static-pressure guide rail throttling device. The easily-adjusting and easily-measuring high-precision closed type constant-pressure static-pressure guide rail throttling device comprises a shell body and a core body, wherein the shell body is internally provided with an oil inlet cavity and an oil outlet cavity; the shell body is provided with a core body mounting position joined with the oil inlet cavity and the oil outlet cavity; the core body is mounted in the core body mounting position; the core body is provided with a throttling oil path which is used for communicating the oil inlet cavity and the oil outlet cavity; and the outlet of the core body, in the throttling oil path, is connected with a capillary tube stretching into the oil outlet cavity. According to the throttling device, the oil inlet cavity and the oil outlet cavity which are connected with a guide rail oil cavity and an oil supplying system, and the core body mounting position are formed in the shell body respectively; when the throttling device is used, oil liquid enters the oil inlet cavity by the oil supplying system and enters the oil outlet cavity from the capillary tube through the throttling oil path on the core body, so that the throttling is realized. The throttling device has a simple structure and is convenient to detach; and the length of the capillary tube can be adjusted randomly according to requirements, the machining is simple and the cost is low. The core body is directly provided with a detection oil path for detecting the oil pressure of the oil outlet cavity, so that the oil pressure is convenient to detect and the on-line detection can be realized in real time.