I. Overview Pressure is one of the important parameters reflecting the stability of the production process in the industrial production process, ensuring the normal operation of industrial production, and high-efficiency and energy saving. Therefore, pressure gauges are widely used on pressure pipes and pressure vessels in the production site to facilitate the production process. The pressure is effectively detected and controlled. In industrial inspection, when the pressure gauge pointer indicates high or low or even no indication, the pointer has a hysteresis phenomenon, or can not return to zero and over-range faults, etc., the components of the pressure gauge need to be checked and repaired. At this point, you must open the gauge cover.
Most of the pressure gauges currently used are stainless steel shell pressure gauges. The industrial stainless steel pressure gauge is generally composed of a watch case, a cover and an internal spring tube, a hairspring, a gear, a connecting rod, a movement and a pointer, and the like. The connection between the case and the cover is a non-screw connection, and the cover of the pressure gauge is smooth, and its annular shape makes it difficult for ordinary tools to fix it and easily open it. The spring tube, hairspring, gear, and movement of the internal structure of the pressure gauge are all particularly delicate, and easily deformed and damaged when subjected to improper external force.
Second, the use of early decapper The opening of the pressure gauge in the early factory is to use the method of direct screwing or tapping. For those with weaker wrists or with slight deformation of the pressure gauge housing and serious contamination of the housing surface, unscrew the pressure gauge cover by hand is undoubtedly a test, and the percussion method is even more strenuous and the percussion force is too small. Less than the effect of opening the lid, if the percussion force is greater, it will damage the internal small parts of the pressure gauge, resulting in the pressure gauge being scrapped. Even worse, it will cause unpredictable damage to one's hand, and ultimately will not be worth the candle. In the factory, the most used pressure gauge is Y-100 stainless steel pressure gauge with a cover diameter of 100m. Other types of pressure gauges are relatively small in factories, such as pressure gauges that come with the equipment. In the process of general pressure gauge inspection, the time for opening the lid is often longer than the time for inspection. Therefore, this article has designed a pressure gauge cover opening and closing device for the Y-100 pressure gauge, which can solve the above problems. problem. For other types of pressure gauges, depending on the diameter of the pressure gauge cover, the diameter of the opener body can be changed. A pressure gauge decapper suitable for this type of pressure gauge can be made. 
Third, the new design and use of opener In order to overcome the pressure gauge in the calibration when the cover open difficult or unable to open the current situation, improve work efficiency, save time and manpower, this paper designed a new type of industrial pressure gauge open cover The opener structure is mainly composed of a link mechanism (1), a cover opener body (2), a handle (3) and a rubber sleeve (4). The opener body is divided into left and right parts and is symmetrical to each other, and is connected by a connecting rod mechanism. The handle is fixed on the opener body. The material of the pressure gauge opener connecting rod mechanism is 316 stainless steel, and the connecting rod mechanism and the body The connection is riveted. The contact surface of the pressure gauge opening cover body and the pressure gauge cover is knurled to increase the friction and prevent the contact surface between the pressure gauge body and the pressure gauge cover from slipping. The material of the handle is 316 hollow stainless steel tube. In order to reduce the overall weight of the lid opener, the length of the handle is 300m2, which ensures that the moment is appropriate, and the handle is gripped with a rubber sleeve to ensure the force, reduce the damage of the hand and the number of handles is two, and the pressure gauge is opened The included angle between the two handles is 10°, which helps to better tighten the pressure gauge case. The connection between the two handles and the opener body is welding. The connection is firm and the force is not great. Loosening. The main diagram of this pressure gauge decapper is shown in Fig. 1~Fig. 3.
Figure 1 is a schematic diagram of a preferred embodiment of the design, wherein (1) linkage mechanism (2) opener body (3) handle (4) rubber sleeve;
Figure 2 is a schematic diagram of a specific structure of the linkage mechanism and the opener body, wherein AA is a right sectional view, BB is a left sectional view, CC is a partial sectional view;
FIG. 3 is a partial enlarged view of the link mechanism.
The main function of this opener is as follows: Firstly, the pressure gauge is installed on the calibration table, and the pressure gauge cover body is used to clamp the pressure gauge cover; the handle is used to tighten the force, and then it is rotated counterclockwise to open. Turn the cover clockwise to tighten it.
The pressure gauge opener reduces the labor intensity for the pressure gauge verification personnel identification pressure gauge, improves the pressure gauge identification efficiency, and ensures the normal operation of the factory. It solves the problem that the pressure gauge cover is difficult to open or cannot be opened, and the opener can be directly used on the pressure gauge verification table, which saves a lot of time and manpower, especially for those with weak wrist strength (female workers) or pressure For gauges with a slight deformation of the outer shell and a severe corrosion of the outer surface of the outer shell, this is a good tool for opening the lid of the pressure gauge. The pressure gauge opener can be applied to any place, such as a laboratory, a calibration inspection, a site, and the like, and is convenient to carry. The pressure gauge cover can be directly disassembled and installed on a calibration table, which is convenient and flexible.
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