Flue gas emission working condition instrument

Abstract

The utility model discloses a flue gas emission working condition instrument, which relates to the flue gas detection device field, and comprises an installation sleeve and a pitot tube, the pitot tube is slidably installed in the installation sleeve, the surface of the pitot tube is provided with a sealing sleeve, the top of the sealing sleeve is provided with a protrusion, the protrusion is of a hollow structure, and the pitot tube is provided with a sealing ring. The protrusions communicate with an inner cavity of the sealing sleeve, the sealing sleeve is filled with air so that the protrusions can expand to be tightly attached to the interior of the mounting sleeve, and a pushing assembly is arranged on the surface of the pitot tube. The pitot tube is arranged in the mounting sleeve in a sliding mode, the mounting sleeve is fixedly connected with the flue straight tube, in order to improve the sealing effect of the pitot tube and the mounting sleeve, the sealing sleeve and the protrusions are arranged on the surface of the pitot tube, the protrusions are tightly attached to the mounting sleeve through inflation, and the sealing effect of the pitot tube is enhanced; and the pushing assembly pushes the sealing sleeve to move forwards, the sealing sleeve temporarily releases sealing of the mounting sleeve, and movement of the pitot tube is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of smoke detection devices, in particular to a smoke emission condition meter. Background Art

[0002] The monitoring of flue gas emissions generally uses a condition recorder, which is composed of a temperature, pressure and flow integrated monitoring subsystem, a humidity monitoring subsystem, a particulate matter monitoring subsystem, an atmospheric pressure monitoring subsystem and an expandable VOCS monitoring subsystem. It is an integrated temperature, humidity, pressure, flow rate, particulate matter, atmospheric pressure and VOCS monitoring system specially developed for the high dust, high temperature, high humidity, high corrosion and low flow rate environment for continuous monitoring of flue gas emissions. It meets the requirements of relevant national standards and is suitable for real-time continuous measurement of multiple flue gas parameters in the flue gas emission monitoring system.

[0003] When installing the operating condition recorder, it is generally necessary to drill a hole in the flue and pre-embed or weld a stainless steel straight pipe and a docking flange at the drilling position. Then, insert the Pitot tube into the straight pipe and fix it with the flange. Adjust the opening direction of the Pitot tube according to the direction of flue gas flow so that one port of the Pitot tube faces the direction of the airflow, which is the windward port; the other port faces away from the airflow direction, which is the leeward port.

[0004] However, the length of the existing Pitot tube inside the flue is mostly fixed, and the end position of the Pitot tube remains fixed, so that one device is only suitable for flues with one inner diameter and cannot be used in flues with different inner diameters. The applicability is poor. If the Pitot tube is changed to a movable setting, it may affect the sealing effect between the Pitot tube and the flue, causing smoke leakage inside the flue, which in turn has an adverse effect on the operating condition recorder. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a flue gas emission condition meter to solve the technical problem that the movable pitot tube of a general condition recorder will affect the sealing effect between the pitot tube and the flue.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flue gas emission condition meter, comprising a mounting sleeve and a pitot tube, the pitot tube being slidably mounted inside the mounting sleeve, a sealing sleeve being arranged on the surface of the pitot tube, a protrusion being arranged on the top of the sealing sleeve, the protrusion being a hollow structure, and being communicated with the inner cavity of the sealing sleeve, air being filled into the sealing sleeve to cause the protrusion to expand and fit tightly with the inside of the mounting sleeve, a pushing assembly being arranged on the surface of the pitot tube, and the pushing assembly controlling the sealing sleeve to move along the surface of the pitot tube.

[0007] The utility model is further configured as follows: the pushing assembly includes a rotating sleeve, a connecting rod and an inclined surface, the rotating sleeve is threadedly arranged on the surface of the pitot tube, a plurality of connecting rods are movably arranged on one side of the rotating sleeve, one end of the connecting rod is connected to one side of the sealing sleeve, and the surface of the pitot tube is provided with an inclined surface.

[0008] The utility model is further configured that a slide groove is opened on one side of the rotating sleeve, one end of the connecting rod is slidably arranged inside the slide groove and is limited by the slide groove, and when the rotating sleeve rotates and translates along the Pitot tube, it drives the connecting rod to move forward.

[0009] The utility model is further configured that an air inlet is provided on one side of the sealing sleeve, and a pressure relief valve is installed at one end of the air inlet.

[0010] The utility model is further configured that a flange is fixedly arranged on the surface of the installation sleeve, and the flange is connected to a flange structure on a fixed pipe on the surface of the flue.

[0011] The utility model is further configured such that a sealing ring is provided at the contact position between the Pitot tube and the mounting sleeve, and the sealing ring is fitted to the surface of the Pitot tube.

[0012] The utility model is further configured that a thermal resistor is installed inside the pitot tube, and the thermal resistor is connected to an external receiving device through a lead wire.

[0013] To sum up, the utility model mainly has the following beneficial effects: the utility model slides the Pitot tube inside the mounting sleeve, and the mounting sleeve is fixedly connected to the flue straight pipe. In order to improve the sealing effect of the Pitot tube and the mounting sleeve, a sealing sleeve and a protrusion are arranged on the surface of the Pitot tube, and the protrusion is inflated to fit tightly with the mounting sleeve to enhance the sealing effect. When it is necessary to control the movement of the Pitot tube, the protrusion is deflated, and the pushing component pushes the sealing sleeve forward. The sealing sleeve temporarily releases the seal on the mounting sleeve, thereby facilitating the movement of the Pitot tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the installation structure of the installation sleeve and the fixing sleeve of the utility model;

[0015] Figure 2 This is a structural schematic diagram of the installation sleeve and the pitot tube of the utility model;

[0016] Figure 3 This is a schematic diagram of the surface structure of the pitot tube of the utility model from a first viewing angle;

[0017] Figure 4 This is a schematic diagram of the surface structure of the pitot tube of the utility model from a second viewing angle;

[0018] Figure 5It is a schematic diagram of the surface structure of the rotating sleeve of the utility model.

[0019] In the figure: 1. Mounting sleeve; 2. Pitot tube; 3. Sealing ring; 4. Sealing sleeve; 5. Protrusion; 6. Air inlet; 7. Rotating sleeve; 8. Connecting rod; 9. Inclined surface; 10. Fixed pipe; 11. Flange; 12. Slide groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0021] The following describes an embodiment of the utility model based on its overall structure.

[0022] A flue gas emission condition instrument, such as Figure 1-5 As shown, it includes a mounting sleeve 1 and a Pitot tube 2. A stainless steel fixing pipe 10 is pre-buried by punching holes on the side wall of the flue and welding. The flange structure on the fixing pipe 10 is connected to the flange plate 11 on the surface of the mounting sleeve 1. After the mounting sleeve 1 is fixed, the Pitot tube 2 is ready to be installed.

[0023] The pitot tube 2 can be slidably installed inside the mounting sleeve 1. A sealing ring 3 is provided at the contact position between the pitot tube 2 and the mounting sleeve 1. The sealing ring 3 is attached to the surface of the pitot tube 2. The sealing ring 3 forms a preliminary seal between the pitot tube 2 and the mounting sleeve 1. However, the pitot tube 2 can still move through the mounting sleeve 1. In order to further improve the sealing effect between the pitot tube 2 and the mounting sleeve 1, a sealing sleeve 4 is provided on the surface of the pitot tube 2.

[0024] A protrusion is arranged on the top of the sealing sleeve 4, and the protrusion 5 is a hollow structure, and the protrusion 5 is connected with the inner cavity of the sealing sleeve 4. When air is filled into the sealing sleeve 4, the protrusion 5 expands and fits tightly with the inside of the installation sleeve 1. The protrusion 5 plays a role of further sealing the installation sleeve 1 on the basis of the original sealing of the sealing sleeve 4. In the above structure, the expansion of the protrusion 5 is realized by the filling of air, and the air comes from the air pump recoil structure of the working condition instrument. The air pump recoil structure is used to pass air into the pitot tube 2 so that the dust accumulated at the air inlet of the pitot tube 2 extending into the flue is sprayed out. It is an existing structure, so it is not described in detail in the figure. Therefore, an air inlet 6 is arranged on one side of the sealing sleeve 4, and the air pump recoil structure outputs a pipeline connected to the air inlet 6 to inflate the protrusion 5. In order to prevent the protrusion 5 from being damaged due to excessive expansion, a pressure relief valve and a one-way valve are also arranged on the air inlet 6. The gas enters the inside of the sealing sleeve 4 and the protrusion 5 through the one-way valve, and the pressure relief valve balances the internal and external pressures to prevent excessive inflation.

[0025] The above structure realizes the sealing effect of the sealing ring 3, the sealing sleeve 4 and the protrusion 5. However, when the protrusion 5 is fully expanded, the Pitot tube 2 cannot be moved. In order to facilitate the application of the working condition instrument to different flues, the Pitot tube 2 needs to be moved. Therefore, the sealing sleeve 4 and the protrusion 5 can be exhausted to shrink the protrusion 5, and then the Pitot tube 2 and the sealing sleeve 4 can be loosened by pushing the component, so as to facilitate the movement of the Pitot tube 2.

[0026] The pushing component includes a rotating sleeve 7, which is threadedly arranged on the surface of the Pitot tube 2. A plurality of connecting rods 8 are movably arranged on one side of the rotating sleeve 7. One end of the connecting rod 8 is fixedly connected to one side of the sealing sleeve 4. An inclined surface 9 is provided on the surface of the Pitot tube 2. When the sealing sleeve 4 needs to be loosened, the rotating sleeve 7 is rotated clockwise to make the rotating sleeve 7 move forward. At this time, the connecting rod 8 moves forward accordingly and drives the sealing sleeve 4 to move forward to reach the position of the inclined surface 9 on the surface of the Pitot tube 2. At this time, the Pitot tube 2 and the sealing sleeve 4 are in a loose state, so the Pitot tube 2 can be made to move back and forth continuously, so that the Pitot tube 2 drives the sealing sleeve 4 to move forward slowly. When the Pitot tube 2 reaches the corresponding position, the rotating sleeve 7 is rotated counterclockwise to make the rotating sleeve 7 move backward. At this time, the connecting rod 8 moves backward accordingly and drives the sealing sleeve 4 to move backward, leaving the inclined surface 9 and contacting the Pitot tube 2 again. At this time, inflation continues to be carried out to achieve the sealing between the protrusion 5 and the mounting sleeve 1, which also plays a role of fixed limit while sealing.

[0027] A slide groove 12 is provided on one side of the rotating sleeve 7, and one end of the connecting rod 8 is slidably disposed inside the slide groove 12 and is limited by the slide groove 12, so that the rotating sleeve 7 can drive the connecting rod 8 to move forward when rotating and translating along the Pitot tube 2.

[0028] A thermal resistor is installed inside the pitot tube 2, and the thermal resistor is connected to the external receiving device through a lead wire. The working condition instrument uses the pitot tube method to measure the flue gas flow rate for temperature and pressure flow monitoring of the flue. The dynamic pressure, static pressure and temperature of the flue gas are measured by the pitot tube 2, the thermal resistor, the pressure sensor and the temperature sensor. These parameters are in a certain proportional relationship with the measured flue gas flow rate, so the flow rate of the flue gas can be quantified, and the signal is transmitted to the corresponding instrument receiving module through the lead wire for processing.

[0029] Although an embodiment of the utility model has been shown and described, this specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

Claims

1. A flue gas emission condition instrument, comprising a mounting sleeve (1) and a pitot tube (2), characterized in that: The Pitot tube (2) is slidably installed inside the mounting sleeve (1); a sealing sleeve (4) is provided on the surface of the Pitot tube (2); a protrusion (5) is provided on the top of the sealing sleeve (4); the protrusion (5) is a hollow structure, and the protrusion (5) is connected to the inner cavity of the sealing sleeve (4); air is filled into the sealing sleeve (4) to make the protrusion (5) expand and fit tightly with the inside of the mounting sleeve (1); a pushing component is provided on the surface of the Pitot tube (2); the pushing component controls the sealing sleeve (4) to move along the surface of the Pitot tube (2).

2. A flue gas emission condition instrument according to claim 1, characterized in that: The pushing assembly comprises a rotating sleeve (7), a connecting rod (8) and an inclined surface (9); the rotating sleeve (7) is threadedly arranged on the surface of the pitot tube (2); a plurality of connecting rods (8) are movably arranged on one side of the rotating sleeve (7); one end of the connecting rod (8) is connected to one side of the sealing sleeve (4); and the surface of the pitot tube (2) is provided with an inclined surface (9).

3. A flue gas emission condition instrument according to claim 2, characterized in that: A slide groove (12) is provided on one side of the rotating sleeve (7), one end of the connecting rod (8) is slidably arranged inside the slide groove (12) and is limited by the slide groove (12). When the rotating sleeve (7) rotates and translates along the Pitot tube (2), it drives the connecting rod (8) to move forward.

4. The flue gas emission condition instrument according to claim 1, characterized in that: An air inlet (6) is provided on one side of the sealing sleeve (4), and a pressure relief valve is installed at one end of the air inlet (6).

5. The flue gas emission condition instrument according to claim 1, characterized in that: A flange (11) is fixedly arranged on the surface of the installation sleeve (1), and the flange (11) is connected to a flange structure on a fixed pipe (10) on the surface of the flue.

6. The flue gas emission condition instrument according to claim 1, characterized in that: A sealing ring (3) is provided at the contact position between the Pitot tube (2) and the mounting sleeve (1), and the sealing ring (3) is fitted on the surface of the Pitot tube (2).

7. The flue gas emission condition instrument according to claim 1, characterized in that: A thermal resistor is installed inside the Pitot tube (2), and the thermal resistor is connected to an external receiving device via a lead wire.

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