Pressure gauge with inflation and deflation functions

Abstract

The utility model belongs to the technical field of pressure instruments and meters, and relates to a pressure gauge with inflation and deflation functions, which comprises a shell, a central shaft, a spiral wrapping end tube, a dial, a pointer, an upper gasket, a lining ring, gauge glass, a sealing gasket and a screw, the pressure of the pressure accumulator is transmitted into the second cavity in the mode that the inclined hole is formed in the shell, the spiral wrapping end pipe welded to the shell is deformed after sensing the pressure so as to drive the pointer to indicate the pressure value on the dial, when the pressure gauge displays that the pressure of the pressure accumulator is lower than a certain value, inflation can be conducted through the inflation valve, and the pressure meter is suitable for various use environments.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pressure instrument, and particularly relates to a pressure gauge with air charging and discharging functions. BACKGROUND

[0002] The pressure gauge refers to a gauge with an elastic element as a sensitive element for measuring and indicating pressure higher than ambient pressure, and is widely applied, especially on accumulators, for displaying gas pressure in real time.

[0003] At present, the design of the pressure gauge is mostly to provide a single interface connected with the accumulator, and when the pressure of the accumulator is too high or too low, air charging and discharging is performed through the air charging valve installed at the other joint of the accumulator, so that, in order to facilitate field use, an air charging valve and a pressure gauge are designed. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a pressure gauge with air charging and discharging functions, which displays the gas pressure of the accumulator in real time through the pressure gauge and realizes accumulator pressure regulation through air charging and discharging of the air charging valve.

[0005] The application provides a pressure gauge with air charging and discharging functions, which comprises:

[0006] A shell with a first cavity and a second cavity, wherein the second cavity is provided with an air charging valve mechanical interface;

[0007] An accumulator mechanical interface arranged on the shell, wherein the accumulator mechanical interface is used for connecting the accumulator;

[0008] An inclined hole arranged on the shell, wherein one end of the inclined hole is connected with the accumulator mechanical interface, and the other end of the inclined hole is connected with the second cavity;

[0009] A pressure sensitive assembly arranged in the first cavity, wherein the pressure sensitive assembly is used for sensing the pressure of the accumulator;

[0010] An air charging valve arranged at the air charging valve mechanical interface, wherein the air charging valve is used for charging and discharging the accumulator.

[0011] Preferably, the pressure sensitive assembly comprises:

[0012] A central shaft fixed in the first cavity;

[0013] A spiral end-wrapped tube sleeved on the central shaft; wherein one end of the spiral end-wrapped tube extends to the second cavity, so as to realize the purpose of sensing the pressure of the accumulator;

[0014] A pointer fixed with the spiral end-wrapped tube through a winding package.

[0015] Preferably, the lower end of the central shaft is fixedly connected with the lower wall of the first cavity by means of glue.

[0016] Preferably, the pressure gauge further comprises:

[0017] A dial is arranged in the first cavity, and the dial is below the pointer.

[0018] Preferably, the pressure gauge further comprises a gasket, an upper gasket and a watch glass.

[0019] The gasket, the upper gasket and the watch glass are fixed to the opening of the first cavity by means of the shell.

[0020] Preferably, a clamping groove is arranged in the first cavity, and the dial is fixedly connected in the first cavity by means of the clamping groove and glue.

[0021] The application has the following technical effects:

[0022] The pressure gauge can be used conveniently, the communication of the gas at both ends of the accumulator and the inflation valve is realized by means of the inclined hole in the shell, the pressure of the gas can be measured in real time, and the inflation valve can be used to inflate or deflate the gas when the pressure of the accumulator is too high or too low, so that the pressure of the accumulator can be adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 A structure diagram of the pressure gauge with the inflation and deflation functions is provided for the embodiment of the application.

[0024] Fig. 2 A diagram of the position of the inclined hole and the position of the welding of the spiral wrapped end pipe is provided for the embodiment of the application.

[0025] Fig. 3 A structure diagram of the dial is provided for the embodiment of the application. DETAILED DESCRIPTION

[0026] The application provides a pressure gauge with inflation and deflation functions, which comprises a shell 1, a central shaft 2, a spiral wrapped end pipe 3, a dial 4, a pointer 5, an upper gasket 6, a gasket 7, a watch glass 8, a sealing gasket 9 and a screw 10. The pressure of the accumulator is transmitted to the second cavity by means of the inclined hole in the shell, the spiral wrapped end pipe welded on the shell is deformed after the pressure is sensed, so as to drive the pointer to indicate the pressure value on the dial. When the pressure of the accumulator is lower than a certain value, the inflation valve can be used to inflate the gas, and the pressure gauge is suitable for various use environments.

[0027] Please refer to Figs. 1-3The utility model relates to a pressure gauge with gas charging and discharging function, which comprises a shell 1 divided into two parts, sealed and connected by a sealing washer 9 and a screw 10, the shell 1 having two interfaces, one being a mechanical interface connected with an accumulator, and the other being a mechanical interface connected with a gas charging valve, the two interfaces being communicated by means of an inclined hole in the shell; and a spiral end-wrapped tube 3 having an extension end welded and fixed to the shell 1.

[0028] The spiral end-wrapped tube 3 has a central shaft 2 inserted therein, and the central shaft 2 is fixed to the shell 1 by means of a glueing liquid.

[0029] The spiral end-wrapped tube 3 is fixed to a pointer 5 by means of winding.

[0030] The shell 1 has a gasket 7, an upper washer 6 and a watch glass 8 fixed to the top by means of winding.

[0031] The pointer 5 is provided below with a dial 4.

[0032] The dial 4 is fixed in the shell 1 by means of a clamping slot 14 and a glueing liquid.

[0033] When the pointer 5 shows that the pressure value of the accumulator is lower than a certain value, the accumulator can be charged by means of the gas charging valve 11, and the gas enters the accumulator through the inclined hole of the shell 1.

[0034] Working principle:

[0035] The initial end (i.e. the extension end 13) of the spiral end-wrapped tube 3, which is the transition from the spiral part to the circular tube part, is fixed to the shell 1 by means of tin soldering. In the working process, the gas end pressure of the accumulator enters the second cavity through the inclined hole 12 of the shell 1, and is filled into the spiral end-wrapped tube 3, so that the free end of the spiral end-wrapped tube 3 is displaced under the action of pressure, thereby driving the pointer 5 to rotate and indicate the pressure value. When the gas end pressure of the accumulator is insufficient, one-way charging is carried out by means of the gas charging valve, and part of the gas enters the accumulator through the inclined hole of the shell 1, and part of the gas is filled into the spiral part of the spiral end-wrapped tube 3, so that the free end of the spiral end-wrapped tube 3 is displaced under the action of pressure, thereby driving the pointer 5 to rotate and indicate the pressure value.

Claims

1. A pressure gauge having a function of charging and discharging air, characterized by comprising: The pressure gauge comprises: a housing having a first cavity and a second cavity, the second cavity having a charging valve mechanical interface; a pressure accumulator mechanical interface provided on the housing, the pressure accumulator mechanical interface being used for connecting a pressure accumulator; an inclined hole provided on the housing, one end of the inclined hole being connected with the pressure accumulator mechanical interface, and the other end of the inclined hole being connected with the second cavity; a pressure sensitive assembly provided in the first cavity, the pressure sensitive assembly being used for sensing pressure of the pressure accumulator; a charging valve provided at the charging valve mechanical interface, the charging valve being used for charging and discharging the pressure accumulator.

2. The pressure gauge according to claim 1, characterized in that The pressure sensitive assembly comprises: a central shaft (2) fixed in the first cavity; a spiral end-wrapped tube (3) sleeved on the central shaft (2); wherein one end of the spiral end-wrapped tube (3) extends to the second cavity, so as to achieve the purpose of sensing pressure of the pressure accumulator; a pointer (5) fixed with the spiral end-wrapped tube (3) through wrapping.

3. The pressure gauge of claim 2, wherein, The lower end of the central shaft (2) is adhesively fixed with the lower wall of the first cavity by a glue liquid.

4. The pressure gauge of claim 2, wherein, The pressure gauge further comprises: a scale disc (4) provided in the first cavity, the scale disc (4) being located below the pointer (5).

5. The pressure gauge of claim 4, wherein, The pressure gauge further comprises a gasket (7), an upper gasket (6) and a watch glass (8); wherein the housing (1) fixes the gasket (7), the upper gasket (6) and the watch glass (8) at the opening of the first cavity through wrapping.

6. The pressure gauge of claim 4, wherein, The first cavity is provided with a clamping groove, and the scale disc (4) is adhesively fixed in the first cavity through the clamping groove and the glue liquid.

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