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CN-224231547-U - Reference type mechanical gas density meter

CN224231547UCN 224231547 UCN224231547 UCN 224231547UCN-224231547-U

Abstract

The utility model belongs to the technical field of gas density measurement, and particularly relates to a reference type mechanical gas density meter. The device comprises a shell, a spring tube, a movement, a bimetal compensation sheet, an air bag chamber, an elastic element and a spring tube, wherein the air bag chamber is communicated with an inner cavity of the shell, a reference air bag is suspended in the air bag chamber, reference air is filled in the reference air bag and used as a density reference object, and the reference air bag is in transmission connection with the spring tube through the elastic element. The reference mechanical gas density meter utilizes the pressure and temperature change of a reference air bag to carry out temperature compensation on the basis of bimetallic strip compensation. Compared with a single bimetallic strip, the characteristics are more stable, and the measurement accuracy and sensitivity are higher.

Inventors

  • LI JUN

Assignees

  • 无锡凯丰电气科技有限公司

Dates

Publication Date
20260512
Application Date
20250530

Claims (5)

  1. 1. A reference type mechanical gas density meter comprises a shell (1), a spring tube, a movement and a bimetal compensation sheet, and is characterized by further comprising: The air bag chamber (2) is communicated with the inner cavity of the shell (1), a reference air bag (3) is suspended in the air bag chamber (2), and the reference air bag (3) is filled with reference gas and is used as a density reference object; And the reference air bag (3) is in transmission connection with the spring tube through the elastic element.
  2. 2. A reference mechanical gas density meter according to claim 1, further comprising a meter connector (4), said meter connector (4) being in communication with the interior cavity of the housing (1) and being arranged at a radial or axial end of the housing (1).
  3. 3. A reference mechanical gas density meter according to claim 2, characterized in that the meter connector (4) is in communication with the inner cavity of the housing (1) through the balloon chamber (2) when the meter connector (4) is at an axial end.
  4. 4. A reference mechanical gas density meter according to claim 2, further comprising a junction signal junction box (5), said junction signal junction box (5) being arranged at a radial end of said housing (1) and being distributed at an angle of 90 ° to said meter connector (4).
  5. 5. A reference mechanical gas density meter according to claim 4, further comprising a micro switch, wherein the micro switch is built in the housing (1), and the micro switch is operated to switch on and off the contact signal junction box (5).

Description

Reference type mechanical gas density meter Technical Field The utility model belongs to the technical field of gas density measurement, and particularly relates to a reference type mechanical gas density meter. Background The conventional common instrument such as a gas density meter or a gas density relay generally consists of a C-shaped spring tube assembly, a machine core, a pointer, a temperature compensation element and the like, and the common instrument performs temperature compensation by means of the characteristics of a single bimetal compensation sheet and temperature change, so that the defect of poor measurement precision and sensitivity exists. Disclosure of utility model The utility model aims to provide a reference type mechanical gas density meter which is used for performing temperature compensation by utilizing the pressure and temperature change of a reference air bag on the basis of bimetallic strip compensation. Compared with a single bimetallic strip, the characteristics are more stable, and the measurement accuracy and sensitivity are higher. In order to solve the technical problems, the utility model provides a reference type mechanical gas density meter, which comprises a shell, a spring tube, a movement and a bimetal compensation sheet, and further comprises: The air bag chamber is communicated with the inner cavity of the shell, a reference air bag is suspended in the air bag chamber, and the reference air bag is filled with reference gas and is used as a density reference substance; And the reference air bag is in transmission connection with the spring tube through the elastic element. Preferably, the device further comprises a meter connector, wherein the meter connector is communicated with the inner cavity of the shell and is arranged at the radial end or the axial end of the shell. Preferably, when the gauge joint is positioned at the axial end, the gauge joint is communicated with the inner cavity of the shell through the air bag chamber. Preferably, the meter connector further comprises a contact signal junction box, wherein the contact signal junction box is arranged at the radial end of the housing and is distributed at an included angle of 90 degrees with the meter connector. Preferably, the circuit further comprises a micro switch, wherein the micro switch is arranged in the shell, and the connection and disconnection of the contact signal junction box are realized through the micro switch. Compared with the prior art, the utility model has the following beneficial effects: The utility model can realize the sensitive measurement of gases with different densities, and the reference substance is gas rather than solid, so that the measurement process is not influenced by viscosity and suspended solid particles, the measurement error is reduced, the measurement range and stability are larger, the utility model is applicable to the measurement and control of different gases, and the sensitivity and the accuracy are high. Drawings Fig. 1 is a structural front view of embodiment 1 of the present utility model. Fig. 2 is a right side view of the structure of embodiment 1 of the present utility model. Fig. 3 is a structural rear view of embodiment 1 of the present utility model. Fig. 4 is a structural elevation view of embodiment 2 of the present utility model. Fig. 5 is a right side view of the structure of embodiment 2 of the present utility model. Fig. 6 is a structural rear view of embodiment 2 of the present utility model. In the figure, the device comprises a 1-shell, a 2-air bag chamber, a 3-reference air bag, a 4-surface connector and a 5-contact signal junction box. Detailed Description The utility model is described in further detail below with reference to the drawings and the specific examples. The advantages and features of the present utility model will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model. Example 1 As shown in fig. 1 to 3, the embodiment of the present utility model provides a radial reference type mechanical gas density meter, which includes a housing 1, a spring tube, a movement and a bimetal compensation plate, wherein the specific connection structure and working principle of the spring tube, the movement and the bimetal compensation plate are well known to the prior art, so detailed description thereof is omitted, and the radial reference type mechanical gas density meter further includes: the air bag chamber 2 is communicated with the inner cavity of the shell 1, a reference air bag 3 is suspended in the air bag chamber 2, and the reference air bag 3 is filled with reference gas and is used as a density reference substance; the elastic element is used for connecting the reference air bag 3 with the spring tube in a transmission way. The me