Straight-through type C-shaped bourdon tube high-pressure sulfur-resisting pressure gauge and manufacturing method thereof

The invention relates to a straight-through type C-shaped bourdon tube high-pressure sulfur-resisting pressure gauge which comprises a joint (4), a C-shaped bourdon tube (6), an upper joint (7), a lower joint (8) and a connecting rod (9), wherein the joint (4) is connected with one end of the C-shaped bourdon tube (6); the C-shaped bourdon tube (6) is connected with the connecting rod (9); and a pressure measuring mechanism (5) is connected with the connecting rod (9). The manufacturing method comprises the steps of manufacturing the C-shaped bourdon tube and assembling the pressure gauge, wherein the C-shaped bourdon tube is manufactured through the steps of S11, preparing a blank; S12, machining the appearance; S13, machining an inner hole; S14, threading; S15, machining the outer wall of the tube; S16, bending and shaping; S17, vacuumizing and heating; and S18, carrying out aging treatment, The pressure gauge is assembled through the steps of S21, assembling the C-shaped bourdon tube; and S22, assembling a gauge head, wherein the C-shaped bourdon tube is made of nickel base alloy material. The pressure gauge has the advantages of high-pressure resistance, corrosion resistance, precision stability and convenience in maintenance.