Plug-in flowmeter for heat recovery electric boiler

Abstract

This application relates to the technical field of supporting equipment for heat recovery electric boilers, and in particular to an easily replaceable insertion flow meter for heat recovery electric boilers. It includes a tee connected to a water pipe, a central pipe threadedly connected to an end cap at the center of the tee, a flow meter body, and a sealing seat inside the central pipe. The sealing seat has a central hole for the flow meter body turbine assembly to pass through, the central hole being cross-shaped. The flow meter body turbine assembly is fixedly connected to a flow meter body signal acquisition component, the flow meter body signal acquisition component having a circular structure suitable for the inner wall of the end cap. The end cap has a through hole for a signal line to pass through, and the sealing seat has a sealing ring. This forms a structure where, after the flow meter body turbine assembly passes through the central hole, the flow meter body is fixed by the threaded connection between the end cap and the central pipe. This application can improve the detection efficiency of heat recovery electric boiler pipelines.

Description

Technical Field

[0001] This application relates to the technical field of auxiliary equipment for heat recovery electric boilers, and in particular to an easily replaceable insertion flow meter for heat recovery electric boilers. Background Technology

[0002] During the operation of heat recovery electric boilers, real-time monitoring of fluid flow in the water pipeline is necessary to ensure boiler heat exchange efficiency and operational safety. Insertion flow meters are commonly used in this scenario due to their high detection accuracy and strong adaptability. However, existing insertion flow meters have some drawbacks. Most existing flow meters are fixed to the water pipeline using flange connections or welding, forming an integrated structure of flow meter and pipeline. When the flow meter malfunctions and needs replacement, the heat recovery electric boiler must be shut down first, and the water pipeline connected to the flow meter must be disassembled. This is not only cumbersome and time-consuming, but it also leads to prolonged boiler downtime, affecting the continuity of production operations and increasing maintenance costs.

[0003] The turbine assembly of a flow meter comes into direct contact with the fluid in the water pipe. However, the circulating fluid in a heat recovery electric boiler is prone to contain impurities such as scale and metal shavings. These impurities directly erode and wear down the turbine blades, leading to decreased turbine assembly accuracy and shortened lifespan. Although some flow meters have filters installed outside the turbine, these filters are mostly fixed structures. Replacing them requires disassembling the entire flow meter or turbine assembly, which also presents problems of complex operation and low maintenance efficiency, and does not allow for quick filter replacement. Utility Model Content

[0004] To improve the detection efficiency of heat recovery electric boiler pipelines, this application provides an easily replaceable insertion flow meter for heat recovery electric boilers.

[0005] The easily replaceable insertion flow meter for heat recovery electric boilers provided in this application adopts the following technical solution: it includes a tee connected to a water pipe, a central pipe at the middle position of the tee with a threaded end cap, a flow meter body, a sealing seat inside the central pipe, a central hole for the flow meter body turbine assembly to pass through on the sealing seat, the central hole being cross-shaped, the flow meter body turbine assembly being fixedly connected to the flow meter body signal acquisition assembly, the flow meter body signal acquisition assembly having a circular structure suitable for the inner wall of the end cap, a through hole for the signal line to pass through on the end cap, and a sealing ring on the sealing seat, forming a structure in which the flow meter body is fixed by the threaded connection between the end cap and the central pipe after the flow meter body turbine assembly passes through the central hole.

[0006] Optionally, one end of the sealing seat is provided with an insertion hole communicating with the central hole, and a fixing frame is provided on one side of the turbine assembly of the flow meter body to cover it. A replaceable filter screen is provided on the fixing frame. A collection box for storing the filter screen is provided at the end of the fixing frame near the turbine, and a placement box for storing the filter screen is provided at the end of the fixing frame away from the turbine.

[0007] Optionally, both the collection box and the placement box are equipped with a rotating shaft, and a winding reel is connected to the rotating shaft. A torsion spring is provided at the end of the rotating shaft located in the placement box, and one end of the rotating shaft located in the collection box extends to the outside of the collection box and is provided with a rotating handle. After the rotating handle is rotated, the unused filter screen on the winding reel located in the placement box will be removed, and the used filter screen will be wound on the winding reel located in the collection box.

[0008] Optionally, both the collection box and the placement box are provided with openings for the filter screen to enter and exit, and a sealing plate is provided at the opening position on the placement box.

[0009] Optionally, a positioning rod is provided at one end of the rotating handle, and a positioning hole is provided on the outer wall of the collection box. There are multiple positioning holes, which are arranged symmetrically about the rotating handle, forming a structure that fixes the rotation angle of the rotating handle after the positioning rod is inserted into the positioning hole.

[0010] In summary, this application includes the following beneficial technical effects:

[0011] 1. The flow meter body is fixed to the water pipe by a tee and the flow meter is fixed by the threaded connection between the end cap and the central tube. When replacing, you only need to unscrew the end cap to take out the flow meter body from the central tube. There is no need to disassemble the tee and the water pipe, which greatly shortens the replacement time.

[0012] 2. The cross-shaped center hole of the sealing seat can circumferentially position the turbine assembly and prevent the turbine assembly from deflecting. The sealing ring on the sealing seat forms a double seal after the end cover is tightened, which effectively prevents fluid from leaking from the connection between the central tube and the end cover or the gap between the sealing seat and the turbine assembly.

[0013] 3. The filter screen on the fixed frame can filter the fluid in the water pipe, intercept impurities such as scale and metal shavings, prevent impurities from directly washing and wearing the turbine assembly, extend the service life of the turbine assembly, and reduce the replacement frequency of the flow meter;

[0014] 4. By cooperating with the rotating handle, shaft, reel, and torsion spring, rotating the handle can retract the used filter screen in the collection box. At the same time, the torsion spring in the box drives the shaft to rotate, releasing the unused filter screen, thus completing the filter screen replacement. The positioning rod and positioning hole can fix the angle of the rotating handle to ensure the filter screen is taut and guarantee the filtration effect. The sealing plate of the box can protect the unused filter screen. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the easily replaceable insertion flow meter for the heat recovery electric boiler of this application;

[0016] Figure 2 This is a structural diagram of the easily replaceable insertion flow meter mounting frame for a heat recovery electric boiler according to this application;

[0017] Figure 3 This is an enlarged view of section A of the structural diagram of the easily replaceable insertion flow meter fixing frame for the heat recovery electric boiler of this application;

[0018] Figure 4 This is a top view of the easily replaceable insertion flow meter for the heat recovery electric boiler of this application.

[0019] Reference numerals: 1. Tee, 2. End cap, 3. Sealing seat, 4. Turbine assembly, 5. Center hole, 6. Signal acquisition assembly, 7. Through hole, 8. Sealing ring, 9. Insertion hole, 10. Fixing frame, 11. Filter screen, 12. Collection box, 13. Placement box, 14. Shaft, 15. Rewind reel, 16. Rotating handle, 17. Opening, 18. Sealing plate, 19. Positioning hole. Detailed Implementation

[0020] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0021] This application discloses an easily replaceable insertion flow meter for heat recovery electric boilers. For example... Figure 1 and 4 As shown, the system includes a tee 1 connected to a water pipe, with an end cap 2 threadedly connected to the center pipe at the middle of the tee 1, and a flow meter body. A sealing seat 3 is snapped into the center pipe, and the sealing seat 3 has a central hole 5 for the flow meter body turbine assembly 4 to pass through. The central hole 5 is cross-shaped. The flow meter body turbine assembly 4 is fixedly connected to the flow meter body signal acquisition component 6, which has a circular structure suitable for the inner wall of the end cap 2. The end cap 2 has a through hole 7 for the signal line connected to the flow meter body signal acquisition component 6 to pass through. The sealing seat 3 has an annular groove, and a sealing ring 8 is installed in the annular groove. This forms a structure in which the flow meter body turbine assembly 4 passes through the central hole 5, and the flow meter body is fixed by the threaded connection between the end cap 2 and the center pipe.

[0022] In one embodiment, according to the appendix Figure 2 and 3As shown, one end of the sealing seat 3 is provided with an insertion hole 9 communicating with the central hole 5, and the insertion hole 9 has a rectangular structure. A fixing frame 10 is screwed on one side of the flowmeter body turbine assembly 4, covering it. Multiple fixing rods are provided inside the fixing frame 10 and are evenly spaced. A replaceable filter screen 11 is provided on the fixing frame 10. A collection box 12 for storing the filter screen 11 is screwed to the end of the fixing frame 10 near the turbine. A placement box 13 for storing the filter screen 11 is provided at the end of the fixing frame 10 away from the turbine and inside the insertion hole 9. A rotating shaft 14 is rotatably connected to both the collection box 12 and the placement box 13. A winding reel 15 is keyed to the rotating shaft 14. The winding reel 15 is prior art. A torsion spring is provided at the end of the rotating shaft 14 inside the placement box 13. The torsion spring is prior art. One end of the rotating shaft 14 located inside the collection box 12 extends to the outside of the collection box 12 and is fixed to the rotating handle 16 by screws. When the rotating handle 16 is rotated, the unused filter screen 11 on the winding reel 15 located inside the placement box 13 will be removed, and the used filter screen 11 will be wound onto the winding reel 15 located inside the collection box 12. A positioning rod is hinged to one end of the rotating handle 16. The outer wall of the collection box 12 is provided with positioning holes 19. There are multiple positioning holes 19, which are centrally symmetrical about the rotating handle 16, forming a structure that fixes the rotation angle of the rotating handle 16 after the positioning rod is inserted into the positioning hole 19.

[0023] In one embodiment, according to the appendix Figure 3 As shown, both the collection box 12 and the placement box 13 are provided with openings 17 for the filter screen 11 to enter and exit. A slidable sealing plate 18 is provided at the opening 17 on the placement box 13. The placement box 13 is provided with a sliding groove for the sealing plate 18 to slide. The two opposite sides of the sealing plate 18 are provided with elastic protrusions integral with it. The two opposite sides of the sliding groove are provided with slots that cooperate with the elastic protrusions. There are multiple slots and they are evenly spaced along the length of the sliding groove.

[0024] The implementation principle of the easily replaceable insertion flow meter for heat recovery electric boilers in this application embodiment is as follows:

[0025] Embed the sealing seat 3 into the center tube of the tee 1 to ensure that the sealing seat 3 fits tightly against the inner wall of the center tube; pass the turbine assembly 4 of the flow meter body through the "+" shaped center hole 5 of the sealing seat 3 so that the signal acquisition assembly 6 fits against the end face of the sealing seat 3; put the end cap 2 on the outside of the signal acquisition assembly 6 and tighten it with the center tube by thread. At this time, the sealing ring 8 is compressed to achieve a seal.

[0026] When there are many impurities on the surface of the filter screen 11, affecting the flow of fluid, remove the flow meter body, open the sealing plate 18 of the placement box 13, pull out the positioning rod, and turn the rotating handle 16 clockwise. The winding reel 15 in the collection box 12 will wind up the used filter screen 11. At the same time, the torsion spring in the placement box 13 will drive the rotating shaft 14 to rotate, releasing the unused filter screen 11. When the new filter screen 11 completely covers the inlet end of the turbine assembly 4, stop turning the rotating handle 16, insert the positioning rod into the corresponding positioning hole 19 to fix it, close the sealing plate 18, and the filter screen 11 replacement is completed.

[0027] Flowmeter body replacement: When the flowmeter body is faulty and needs to be replaced, first disconnect the signal line, unscrew the end cover 2 counterclockwise, take out the old flowmeter body from the center tube, pass the turbine assembly 4 of the new flowmeter body through the center hole 5 of the sealing seat 3, tighten the end cover 2, connect the signal line, and the replacement can be completed. The whole process does not require disassembling the tee 1 and the water pipe.

[0028] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An easily replaceable insertion flow meter for a heat recovery electric boiler, comprising a tee (1) connected to a water pipe, an end cap (2) threadedly connected to the center pipe at the middle position of the tee (1), and a flow meter body, characterized in that: A sealing seat (3) is provided inside the central tube. A central hole (5) is provided on the sealing seat (3) for the flow meter body turbine assembly (4) to pass through. The central hole (5) is in the shape of a cross. The flow meter body turbine assembly (4) is fixedly connected to the flow meter body signal acquisition assembly (6). The flow meter body signal acquisition assembly (6) is in the shape of a circle suitable for the inner wall of the end cover (2). A through hole (7) for the signal line to pass through is provided on the end cover (2). A sealing ring (8) is provided on the sealing seat (3). After the flow meter body turbine assembly (4) passes through the central hole (5), the flow meter body is fixed by the threaded connection between the end cover (2) and the central tube.

2. The easily replaceable insertion flow meter for a heat recovery electric boiler according to claim 1, characterized in that: The sealing seat (3) has an insertion hole (9) at one end that communicates with the central hole (5). The flow meter body turbine assembly (4) has a fixing frame (10) covering it on one side. The fixing frame (10) has a replaceable filter screen (11). The fixing frame (10) has a collection box (12) for storing the filter screen (11) at the end near the turbine. The fixing frame (10) has a placement box (13) for storing the filter screen (11) at the end away from the turbine.

3. The easily replaceable insertion flow meter for a heat recovery electric boiler according to claim 2, characterized in that: Both the collection box (12) and the placement box (13) are equipped with a rotating shaft (14), and a winding reel (15) is connected to the rotating shaft (14). A torsion spring is provided at the end of the rotating shaft (14) located in the placement box (13). One end of the rotating shaft (14) located in the collection box (12) extends to the outside of the collection box (12) and is provided with a rotating handle (16). After rotating the rotating handle (16), the unused filter screen (11) on the winding reel (15) located in the placement box (13) will be removed, and the used filter screen (11) will be wound on the winding reel (15) located in the collection box (12).

4. The easily replaceable insertion flow meter for a heat recovery electric boiler according to claim 2, characterized in that: Both the collection box (12) and the placement box (13) are provided with openings (17) for the filter screen (11) to enter and exit, and a sealing plate (18) is provided at the opening (17) on the placement box (13).

5. The easily replaceable insertion flow meter for a heat recovery electric boiler according to claim 3, characterized in that: A positioning rod is provided at one end of the rotating handle (16), and a positioning hole (19) is provided on the outer wall of the collection box (12). There are multiple positioning holes (19) and they are arranged symmetrically about the rotating handle (16) to form a structure that fixes the rotation angle of the rotating handle (16) after the positioning rod is inserted into the positioning hole (19).

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