Density relay
By using a dual-axis movement in the density relay, the display pointer and control pointer are separately controlled, the error problem caused by rotating movement of the existing density relay pointer is solved, and the error problem caused by the rotational movement of the existing density relay pointer is achieved, achieving higher accuracy.
Patent Information
- Application Number
- CN202421819883.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The rotational movement of the existing density relay requires the display of gas density and the magnetic auxiliary switch to be opened, resulting in errors in the display of the pointer and the accuracy is difficult to ensure.
The dual-axis movement adopts a dual-axis movement, the front axle control display pointer displays gas density, and the rear axle control controls the pointer to turn on and off the magnetic auxiliary switch. The separation of the control signal and the display density is achieved through two independent pointers, improving accuracy.
By separating the control signal and display density, higher accuracy is achieved, avoiding pointer display errors.
Smart Images
Figure CN222995302U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of density relays, in particular to a density relay. Background Art
[0002] In the existing sulfur hexafluoride or mixed gas density relay, a magnetic-assisted switch is adopted inside. Its working principle is that gas enters through the air inlet, and the C-shaped tube expands or contracts, thereby driving the movement of the movement mechanism. The movement mechanism drives the pointer to rotate, and the pointer is used to open and close the magnetic-assisted switch. At the same time, the pointer also needs to display the corresponding gas density reading.
[0003] The above structure has a problem. Since the pointer rotation movement not only needs to display the density of the corresponding gas, but also needs to move the magnetic-assisted switch, this will cause errors in the pointer display and it is difficult to guarantee the accuracy. Content of the Utility Model
[0004] The purpose of the utility model is to overcome the deficiencies of the existing technology and provide a density relay.
[0005] The purpose of the utility model is realized through the following technical solutions: a density relay, including a front cover shell, the front cover shell is connected to a shell body, the shell body is connected to a rear cover, the front cover shell is connected to a window glass, the window glass is connected to a scale dial, a display pointer is provided on the scale dial, the display pointer is connected to one end of a movement mechanism, the other end of the movement mechanism is connected to a control pointer, the movement mechanism is connected to a temperature compensation piece, the temperature compensation piece is connected to a C-shaped tube, the C-shaped tube is connected to and communicated with a base, a base hole is provided on the base, a gasket is provided on the lower side of the base, a magnetic-assisted switch is provided on the lower side of the gasket, and the magnetic-assisted switch is matched with the position of the control pointer.
[0006] Furthermore, a front cover sealing ring is provided between the front cover shell and the shell body.
[0007] Furthermore, a rear cover sealing ring is provided between the shell body and the rear cover.
[0008] Furthermore, the shell body is connected to a junction box.
[0009] The utility model has the following beneficial effects compared with the prior art:
[0010] The utility model adopts a dual-axis movement mechanism. The front shaft of the movement mechanism is used to control the display pointer to display the gas density, and the rear shaft of the movement mechanism is used to control the control pointer to open and close the magnetic-assisted switch. In this way, the control signal and the display density are separated and realized by two pointers, and the accuracy is higher. Description of the Drawings
[0011] Figure 1 is a structural schematic diagram of the utility model;
[0012] Figure 2 This is a schematic structural diagram of the movement of the present utility model. Specific embodiments
[0013] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.
[0014] As Figure 1-2 shown, a density relay includes a front cover 1, the front cover 1 is connected to a housing 7, the housing 7 is connected to a rear cover 9, the front cover 1 is connected to a window glass 2, the window glass 2 is connected to a scale dial 5, a display pointer 41 is provided on the scale dial 5, the display pointer 41 is connected to one end of a movement 15, the other end of the movement 15 is connected to a control pointer 42, the movement 15 is connected to a temperature compensation piece 13, the temperature compensation piece 13 is connected to a C-shaped tube 14, the C-shaped tube 14 is connected to and communicates with a base 6, a base hole 16 is provided on the base 6, a gasket 12 is provided on the lower side of the base 6, a magnetically assisted switch 11 is provided on the lower side of the gasket 12, and the magnetically assisted switch 11 is matched with the position of the control pointer 42.
[0015] A front cover sealing ring 3 is provided between the front cover 1 and the housing 7, a rear cover sealing ring 8 is provided between the housing 7 and the rear cover 9, and the housing 7 is connected to a junction box 10.
[0016] It should be noted that sulfur hexafluoride gas or a mixed gas enters through the base hole 16. The change in air pressure drives the deformation of the port of the C-shaped tube 14, drives the movement of the movement 15 through the temperature compensation piece 13. The rotation of the shaft of the movement 15 drives the movement of the display pointer 41 and the control pointer 42. The scale dial 5 is fixed in front of the base 6, the magnetically assisted switch 11 is fixed behind the base 6, the display pointer 41 is fixed in front of the shaft of the movement 15, the control pointer 42 is fixed behind the shaft of the movement 15. The rotation of the display pointer 41 can reflect the change in the density of the gas on the scale dial 5, and the rotation of the control pointer 42 can control the on-off of the magnetically assisted switch 11, so that the display pointer 41 and the control pointer 42 are separated and do not affect each other.
[0017] Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be defined by the claims.
Claims
1. A density relay, characterized in that: The invention comprises a front cover (1), wherein the front cover (1) is connected to a housing (7), wherein the housing (7) is connected to a rear cover (9), wherein the front cover (1) is connected to a window glass (2), wherein the window glass (2) is connected to a dial (5), wherein a display pointer (41) is provided on the dial (5), wherein the display pointer (41) is connected to one end of a movement (15), wherein the other end of the movement (15) is connected to a control pointer (42), wherein The movement (15) is connected to a temperature compensation sheet (13), the temperature compensation sheet (13) is connected to a C-shaped tube (14), the C-shaped tube (14) is connected to and communicates with a base (6), a base hole (16) is provided on the base (6), a gasket (12) is provided on the lower side of the base (6), a magnetic assist switch (11) is provided on the lower side of the gasket (12), and the magnetic assist switch (11) cooperates with the position of the control pointer (42).
2. The density relay according to claim 1, characterized in that: A front cover sealing ring (3) is provided between the front cover shell (1) and the housing (7).
3. The density relay according to claim 2, characterized in that: A rear cover sealing ring (8) is provided between the housing (7) and the rear cover (9).
4. The density relay according to claim 3, characterized in that: The housing (7) is connected to a junction box (10).