Sulfur hexafluoride quantitative detection system using spring suspension pump

Abstract

This application relates to the field of electronics, specifically to gas detection. A quantitative detection system for sulfur hexafluoride (SF6) using a spring-loaded suspension pump includes a housing, a SF6 sensor, and a pump body, which is a centrifugal pump housed within the housing. The centrifugal pump is connected to the housing via a spring damping assembly. A sampling tube is connected to the inlet of the centrifugal pump, with the end of the sampling tube extending out of the housing away from the centrifugal pump. A connecting pipe is connected to the outlet of the centrifugal pump, with the end of the connecting pipe away from the centrifugal pump connected to the detection inlet of the SF6 sensor. This significantly enhances pump vibration suppression, reduces device size, and does not affect detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of electronic technology, specifically to gas detection. Background Technology

[0002] Sulfur hexafluoride (SF6) is a colorless, odorless, non-toxic, non-flammable, and non-corrosive inert gas. Its insulation strength is 2–3 times that of air, and its insulation performance increases with pressure under high voltage. It is widely used in high-voltage circuit breakers, GIS equipment (gas-insulated switchgear), transformers, and other power equipment.

[0003] The pressure of sulfur hexafluoride (SF6) gas directly affects the insulation strength and arc extinguishing capability of equipment. Sulfur hexafluoride gas leakage leading to a decrease in gas pressure may cause short circuits, discharges, or even explosions in equipment. Therefore, it is necessary to quantitatively detect sulfur hexafluoride gas in order to monitor changes in gas density in real time.

[0004] Existing quantitative detection devices for sulfur hexafluoride (SF6) often employ electrochemical sensors. The electrochemical sensor is located inside a sealed housing. A gas pump draws gas into the sensor cavity, and the sulfur hexafluoride reacts electrochemically with the electrodes to generate a current signal proportional to the concentration, thereby achieving detection.

[0005] For ease of use, the air pump is placed independently outside the sealed housing and connected to the electrochemical sensor inside the sealed housing via a pipeline.

[0006] External air pumps often use diaphragm pumps or centrifugal pumps. The mechanical motion during operation (such as piston reciprocating and impeller rotation) generates high-frequency vibrations. These mechanical vibrations are transmitted to the electrochemical sensor through rigid pipes or supports, resulting in increased signal noise and affecting the current signal output by the electrochemical sensor. Utility Model Content

[0007] The purpose of this invention is to provide a quantitative detection system for sulfur hexafluoride using a spring-loaded suspension pump, in order to solve at least one of the above-mentioned technical problems.

[0008] The technical problem solved by this utility model can be achieved by the following technical solution:

[0009] A sulfur hexafluoride quantitative detection system using a spring-suspended pump includes a housing, a sulfur hexafluoride sensor, and a pump body, wherein the pump body is a centrifugal pump;

[0010] The centrifugal pump is built into the casing;

[0011] The centrifugal pump is connected to the housing via a spring damping assembly;

[0012] The centrifugal pump has a sampling tube connected to its air inlet, with the end of the sampling tube away from the centrifugal pump extending out of the outer casing.

[0013] The outlet of the centrifugal pump is connected to a connecting pipe, and the end of the connecting pipe away from the centrifugal pump is connected to the detection inlet of the sulfur hexafluoride sensor.

[0014] The above design significantly enhances the pump body vibration suppression effect. The centrifugal pump is built into a sealed shell, reducing the size of the device. Compared with other pump bodies, the centrifugal pump vibrates less. The spring damping component further reduces the transmission of centrifugal pump vibration to the gas sensor through vibration isolation and energy dissipation, without affecting the detection accuracy.

[0015] Further optimization involves the spring damping assembly comprising at least two sets of springs arranged axially, symmetrically disposed on the upper and lower sides of the centrifugal pump.

[0016] It also includes at least two sets of springs arranged radially, symmetrically arranged on the left and right sides of the centrifugal pump;

[0017] The spring connects the centrifugal pump to the inner wall of the casing.

[0018] In a further optimization, each of the springs is provided with a piston-type damping cylinder, which connects the centrifugal pump to the inner wall of the outer casing.

[0019] Further optimization involves providing a pipe support within the outer shell cavity, with the connecting pipe fixed to the pipe support;

[0020] The pipe support is fixed to the inner wall of the outer casing;

[0021] A rubber shock-absorbing pad is fixed between the pipe support and the inner wall of the outer shell.

[0022] In the above design, by setting up pipe supports to constrain the connecting pipe, the possibility of the connecting pipe shaking is reduced and the airflow inside the pipe is stabilized. By setting up rubber shock-absorbing pads, rigid connections are reduced, and the shock absorption effect is further improved.

[0023] Further optimization involves installing a mounting plate below the sulfur hexafluoride sensor;

[0024] The mounting plate is fixedly connected to the sulfur hexafluoride sensor.

[0025] A rubber air spring is provided on the side of the mounting plate opposite to the sulfur hexafluoride sensor.

[0026] The rubber air spring is fixed to the inner wall of the outer casing.

[0027] Further optimization involves using a TM-380 brushless DC motor for the centrifugal pump.

[0028] The beneficial effects of this application are as follows:

[0029] (1) The centrifugal pump is built into a sealed housing, reducing the size of the device;

[0030] (2) Centrifugal pumps vibrate less than other pumps. By arranging springs and piston-type damping cylinders on both sides of the axial and radial sides of the centrifugal pump, a multi-directional elastic support structure is formed to suppress the source of vibration and improve the vibration reduction effect.

[0031] (3) By setting up pipe supports to constrain the connecting pipe, the possibility of the connecting pipe shaking is reduced and the airflow inside the pipe is stabilized. By setting up rubber shock-absorbing pads, the rigid connection is reduced and the shock absorption effect is further improved.

[0032] (4) Improve terminal stability by setting a rubber air spring and mounting plate below the sulfur hexafluoride sensor. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0034] Figure 1 This is a schematic diagram of the overall structure of the preferred embodiment of this utility model;

[0035] Figure 2 This is a schematic diagram illustrating the pump body structure of this utility model;

[0036] Figure 3 This is a schematic diagram illustrating the structure of a rubber air spring according to this utility model.

[0037] Reference numerals: 1. Outer shell; 2. Pump body; 3. Sampling tube; 4. Spring; 5. Piston-type damping cylinder; 6. Pipe support; 7. Connecting pipe; 8. Sulfur hexafluoride sensor; 9. Rubber air spring. Detailed Implementation

[0038] To make the above-mentioned objectives, features and advantages of this utility model more readily understood, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0041] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in an embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0042] Reference Figure 1 and Figure 2 As shown, the preferred embodiment of this utility model is a sulfur hexafluoride quantitative detection system using a spring suspension pump, which includes a housing 1, a sulfur hexafluoride sensor 8, and a pump body 2, wherein the pump body 2 is a centrifugal pump.

[0043] The centrifugal pump is built into the housing 1;

[0044] The centrifugal pump is connected to the housing 1 via the shock-absorbing assembly of spring 4;

[0045] The air inlet of the centrifugal pump in the outer casing 1 is connected to a sampling tube 3, and the end of the sampling tube 3 away from the centrifugal pump extends out of the outer casing 1;

[0046] The outlet of the centrifugal pump in the outer casing 1 is connected to a connecting pipe 7, and the end of the connecting pipe 7 away from the centrifugal pump is connected to the detection inlet of the sulfur hexafluoride sensor 8.

[0047] In this embodiment, the vibration suppression effect of the pump body 2 is significantly enhanced, the sealing performance of the device is improved, the centrifugal pump is built into the outer shell 1, the size of the device is reduced, the centrifugal pump vibrates less than other pump bodies 2, and the spring damping assembly further reduces the transmission of centrifugal pump vibration to the sulfur hexafluoride sensor 8 through vibration isolation and energy dissipation, without affecting the detection accuracy.

[0048] Reference Figure 2 As shown, the housing 1 spring 4 damping assembly includes at least two sets of springs 4 arranged axially, which are symmetrically arranged on the upper and lower sides of the centrifugal pump.

[0049] It also includes at least two sets of springs 4 arranged radially, symmetrically arranged on the left and right sides of the centrifugal pump;

[0050] The outer casing 1 and spring 4 connect the centrifugal pump to the inner wall of the outer casing 1.

[0051] In this embodiment, springs 4 are arranged on both sides of the centrifugal pump in the axial direction and the radial direction to form a multi-directional elastic support structure, which suppresses the source of vibration and improves the vibration reduction effect.

[0052] Reference Figure 2 As shown, each outer shell 1 spring 4 is provided with a piston-type damping cylinder 5, and the piston-type damping cylinder 5 of the outer shell 1 connects the centrifugal pump and the inner wall of the outer shell 1.

[0053] Reference Figure 3 As shown, the inner cavity of the outer shell 1 is provided with a pipe support 6, and the connecting pipe 7 of the outer shell 1 is fixed on the pipe support 6.

[0054] The pipe support 6 of the outer casing 1 is fixed to the inner wall of the outer casing 1;

[0055] A rubber shock-absorbing pad is fixed between the pipe support 6 of the outer shell 1 and the inner wall of the outer shell 1.

[0056] In this embodiment, by setting the pipe support 6 to constrain the connecting pipe 7, the possibility of the connecting pipe 7 shaking is reduced and the airflow inside the pipe is stabilized. By setting the rubber shock-absorbing pad, the rigid connection is reduced and the shock absorption effect is further improved.

[0057] Reference Figure 3 As shown, a mounting plate is provided below the sulfur hexafluoride sensor 8 in the outer casing 1;

[0058] The housing 1 mounting plate is fixedly connected to the sulfur hexafluoride sensor 8;

[0059] A rubber air spring 94 is provided on the side of the housing 1 mounting plate opposite to the sulfur hexafluoride sensor 8;

[0060] The rubber air spring 94 of the outer casing 1 is fixed to the inner wall of the outer casing 1.

[0061] Reference Figure 2 As shown, the motor of the centrifugal pump in casing 1 is a TM-380 model brushless DC motor.

[0062] In this embodiment, the brushless motor replaces the mechanical brush with an electronic commutator, eliminating the periodic impact vibration caused by carbon brush wear. Its operation is significantly smoother than that of a traditional brushed motor, effectively reducing the vibration amplitude.

[0063] Reference Figure 1 As shown, the outlet end of the sulfur hexafluoride sensor 8 is connected to an exhaust pipe, and the end of the exhaust pipe away from the sulfur hexafluoride sensor 8 extends out of the outer casing 1.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A sulfur hexafluoride quantitative detection system using a spring-loaded suspension pump, comprising a housing, a sulfur hexafluoride sensor, and a pump body, characterized in that, The pump body is a centrifugal pump; The centrifugal pump is built into the casing; The centrifugal pump is connected to the housing via a spring damping assembly; The centrifugal pump has a sampling tube connected to its air inlet, with the end of the sampling tube away from the centrifugal pump extending out of the outer casing. The outlet of the centrifugal pump is connected to a connecting pipe, and the end of the connecting pipe away from the centrifugal pump is connected to the detection inlet of the sulfur hexafluoride sensor.

2. The sulfur hexafluoride quantitative detection system using a spring-loaded suspension pump according to claim 1, characterized in that, The spring damping assembly includes at least two sets of springs arranged axially, symmetrically disposed on the upper and lower sides of the centrifugal pump. It also includes at least two sets of springs arranged radially, symmetrically arranged on the left and right sides of the centrifugal pump; The spring connects the centrifugal pump to the inner wall of the casing.

3. The sulfur hexafluoride quantitative detection system using a spring-loaded suspension pump according to claim 2, characterized in that, Each of the springs is provided with a piston-type damping cylinder, which connects the centrifugal pump to the inner wall of the outer casing.

4. The sulfur hexafluoride quantitative detection system using a spring-loaded suspension pump according to claim 1, characterized in that, The inner cavity of the outer shell is provided with a pipe support, and the connecting pipe is fixed on the pipe support; The pipe support is fixed to the inner wall of the outer casing; A rubber shock-absorbing pad is fixed between the pipe support and the inner wall of the outer shell.

5. The sulfur hexafluoride quantitative detection system using a spring-loaded suspension pump according to claim 1, characterized in that, A mounting plate is provided below the sulfur hexafluoride sensor; The mounting plate is fixedly connected to the sulfur hexafluoride sensor. A rubber air spring is provided on the side of the mounting plate opposite to the sulfur hexafluoride sensor. The rubber air spring is fixed to the inner wall of the outer casing.

6. The sulfur hexafluoride quantitative detection system using a spring-loaded suspension pump according to claim 1, characterized in that, The centrifugal pump is powered by a TM-380 brushless DC motor.

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