A sealing structure and sealing method for ultrasonic water meter signal line

Abstract

The present invention provides a sealing structure and a sealing method for an ultrasonic water meter signal line. The sealing structure of the ultrasonic water meter signal line is arranged at the connection between the meter head and the wire hole of the base body. The outer wall of the base body extends an annular connecting wall outward around the wire hole. The meter head is provided with a connecting groove corresponding thereto. An elastic sealing member is arranged in the connecting wall. At least part of the elastic sealing member can be inserted into the wire hole. When the connecting wall and the connecting groove are plugged and fixed, the elastic sealing member can be pressed against the inside of the connecting wall and the wire hole. A threading hole is provided inside the elastic sealing member for the signal line to be connected to the meter head. With the above structure, when the base body and the meter head are pressed and fixed, the elastic sealing member is pressed against the inside of the connecting wall and the wire hole, so that the wire hole and the flow chamber are kept sealed, and the assembly efficiency is high and the cost is low. Compared with structural adhesives, the elastic sealing member is more corrosion-resistant and high-temperature-resistant, and can effectively prevent it from being corroded by liquids, softened by high temperatures, etc. It is less affected by the environment, and the service life of the ultrasonic water meter is high.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline flow measurement, and in particular to a sealing structure for a signal line of an ultrasonic water meter. Background Art

[0002] Ultrasonic water meter is a new type of water meter that detects the time difference caused by the change in speed when the ultrasonic sound beam propagates downstream and upstream in water, analyzes and processes the water flow rate, and further calculates the water flow rate.

[0003] The ultrasonic water meter in the prior art is usually of pipe segment type, that is, the two transducers for sending and receiving ultrasonic sound beams are both arranged on the inner wall of the pipe segment to be measured to measure the flow of the corresponding pipe segment. The flow of the pipe segment to be measured measured by each transducer is usually transmitted to the meter head through a signal line so that the meter head can display the current liquid flow.

[0004] When the signal line is connected to the meter head from the transducer, it needs to pass through the flow cavity of the ultrasonic water meter and the wire hole of the water meter base. The wire hole of the water meter base needs to be sealed with the flow cavity to prevent liquid leakage or flow into the inside of the meter head. Structural adhesive is usually used to seal it in the prior art. However, structural adhesive is greatly affected by the environment. It will be corroded by liquid and softened by high temperature with long-term use. In addition, the assembly efficiency of structural adhesive is low and the cost is high, which leads to a reduced service life of the ultrasonic water meter.

[0005] Therefore, how to provide an ultrasonic water meter signal line sealing structure with little environmental impact, high assembly efficiency and low cost is a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0006] The object of the present invention is to provide an ultrasonic water meter signal line sealing structure which is less affected by the environment, has high assembly efficiency and is low in cost.

[0007] In order to solve the above technical problems, the present invention provides a sealing structure for the signal line of an ultrasonic water meter, which is arranged at the connection between the meter head and the wire hole of the base of the ultrasonic water meter, and the outer wall of the base extends an annular connecting wall outward around the wire hole, and the meter head is provided with a connecting groove corresponding to the connecting wall, and an elastic sealing member is provided in the connecting wall, and at least part of the elastic sealing member can be inserted into the wire hole. When the connecting wall and the connecting groove are plugged and fixed, the elastic sealing member can be pressed against the inside of the connecting wall and the wire hole to keep the flow cavity sealed, and a wire threading hole is provided inside the elastic sealing member for the signal line to connect to the meter head.

[0008] With the above structure, when the connecting wall of the base and the connecting groove of the meter head are plugged into each other and pressed and fixed, the elastic seal can be pressed against the inside of the connecting wall and the wire hole, so that the wire hole and the flow cavity are sealed, with high assembly efficiency and low cost; compared with structural adhesives, the elastic seal is more corrosion-resistant and high-temperature resistant, can effectively prevent it from being corroded by liquids, softened by high temperatures, etc., is less affected by the environment, and has a longer service life of the ultrasonic water meter.

[0009] Optionally, the elastic sealing member includes a large head end and a small head end, the shape of the large head end corresponds to the inner shape of the connecting wall, and the small head end can be inserted into the wire hole.

[0010] Optionally, the inner wall of the wire hole is provided with a first step surface, and at least a portion of the bottom surface of the small head end can abut against the first step surface for limiting position; the large head end is provided with a second step surface, and the second step surface is arranged toward the outer wall of the base and can abut against it for limiting position; and / or the large head end and the small head end are split structures.

[0011] Optionally, a clamping portion is protrudingly provided at corresponding positions on the header and the upper surface of the elastic seal, and the clamping portion can press the elastic seal against the connecting wall and the inside of the wire hole when the connecting wall is inserted into the connecting groove.

[0012] Optionally, a connecting hole is provided at a position corresponding to the threading hole of the compression portion and the elastic seal, and the signal line can pass through the wire hole, the threading hole and the connecting hole in sequence to connect to the meter head.

[0013] Optionally, an elastic gasket is further provided between the connecting wall and the connecting groove, and when the two are plugged in and pressed, the elastic gasket can keep the interior of the connecting wall sealed.

[0014] Optionally, the base is provided with a plurality of first fixing holes, the meter head is provided with a plurality of second fixing holes corresponding to the first fixing holes, and the meter head can be fixed to the base by fasteners passing through the second fixing holes and the corresponding first fixing holes.

[0015] Optionally, the fastener is a bolt or a screw.

[0016] Optionally, flanges are provided at corresponding positions of the outer wall of the connecting wall and the meter head, and the meter head and the base are connected by flanges to be pressed and fixed; and / or, the elastic sealing member is made of rubber.

[0017] The present invention also provides a sealing method for an ultrasonic water meter signal line. Based on the sealing structure of the ultrasonic water meter signal line described above, the specific steps are as follows: the signal line is passed through the wire hole of the substrate and the wire threading hole of the elastic seal in sequence and connected to the meter head, the part of the elastic seal corresponding to the wire hole is inserted into the wire hole, the connecting groove of the meter head and the connecting wall of the substrate are plugged and pressed and fixed, and the elastic seal is pressed by the meter head to the connecting wall of the substrate and the inside of the wire hole, so that the flow cavity remains sealed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional exploded view of a sealing structure of an ultrasonic water meter signal line provided by an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 Exploded cross-sectional view of the sealing structure of the ultrasonic water meter signal line;

[0020] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure of the sealing structure of the ultrasonic water meter signal line after installation.

[0021] Figure 1-3 The reference numerals in the figures are described as follows:

[0022] 1. a header, 11. a pressing portion, 11. a communicating hole, 12. a connecting groove, 2. a base, 21. a wire hole, 22. a connecting wall, 22. a first fixing hole, 23. a first step surface, 31. a large head end, 31. a second step surface, 32. a small head end, 33. a threading hole, 4. a fastener, 5. a flow chamber, and 6. an elastic gasket. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] The embodiment of the present invention provides a sealing structure for an ultrasonic water meter signal line, which is arranged at the connection between the meter head 1 of the ultrasonic water meter and the wire hole 21 of the base 2. Figure 1-3 The outer wall of the base 2 extends outwardly to form an annular connecting wall 22 around the wire hole 21. The meter head 1 is provided with a connecting groove 12 corresponding to the connecting wall 22. An elastic seal is provided inside the connecting wall 22, and at least part of the elastic seal can be inserted into the wire hole 21. When the connecting wall 22 and the connecting groove 12 are plugged and fixed, the elastic seal can be pressed against the inside of the connecting wall 22 and the wire hole 21 to keep the flow cavity 5 sealed. A threading hole 33 is penetrated inside the elastic seal for the signal line to connect to the meter head 1.

[0025] With the above structure, when the connecting wall 22 of the base 2 and the connecting groove 12 of the meter head 1 are plugged into each other and pressed and fixed, the elastic seal can be pressed against the inside of the connecting wall 22 and the wire hole 21, so that the wire hole 21 and the flow cavity 5 are kept sealed, and the assembly efficiency is high and the cost is low; compared with structural adhesives, the elastic seal is more corrosion-resistant and high-temperature resistant, and can effectively prevent it from being corroded by liquids, softened by high temperatures, etc., and is less affected by the environment, and the service life of the ultrasonic water meter is long.

[0026] like Figure 2 and Figure 3 As shown, the signal line needs to be connected from the flow cavity 5 of the base 2 into the meter head 1 through the wire hole 21. Since the flow cavity 5 is connected to the pipe section to be measured of the ultrasonic water meter, the liquid in the pipe section to be measured also flows inside it. In order to prevent the liquid in the flow cavity 5 from entering the meter head 1 through the wire hole 21, it is necessary to seal the wire hole 21 and the flow cavity 5.

[0027] Please refer to Figure 1-3 In this embodiment, the connecting wall 22 is a rectangular ring structure protruding from the outer wall of the base 2 and surrounding the wire hole 21. The connecting position between the meter head 1 and the base 2 is provided with a rectangular connecting groove 12 corresponding to the connecting wall 22, such as Figure 3 As shown, at least part of the connecting wall 22 can be inserted into the connecting groove 12, so that the meter head 1 is plugged and fixed to the base 2. Of course, the shapes of the connecting groove 12 and the connecting wall 22 can be determined according to actual conditions, as long as the two can be plugged and fixed to each other, and the middle part of the connecting wall 22 needs to be enclosed to form a reserved space for setting the elastic seal.

[0028] The elastic seal is independently arranged, and the shape of its bottom is the same as that of the wire hole 21, and the volume can be slightly larger than the wire hole 21. The shape of the upper part is the same as the shape of the reserved space enclosed by the connecting wall 22, and the volume can also be slightly larger than the reserved space. When the connecting wall 22 and the connecting groove 12 are plugged into each other and pressed and fixed, the bottom of the elastic seal can be pressed into the wire hole 21, and the upper part is pressed into the reserved space of the connecting wall 22, so that the wire hole 21 and the flow chamber 5 are kept sealed; if the volume of the elastic seal is larger than the corresponding wire hole 21 or the reserved space, the elastic seal will produce a slight deformation after being squeezed, and can fit more closely to the inner wall of the wire hole 21 and the inner wall of the connecting wall 22, so that the sealing effect between the wire hole 21 and the flow chamber 5 is better.

[0029] Specifically, the elastic sealing member includes a large head end 31 and a small head end 32. The shape of the large head end 31 corresponds to the inner shape of the connecting wall 22, and the small head end 32 can be inserted into the wire hole 21. The inner wall of the wire hole 21 is provided with a first step surface 23, and at least part of the bottom surface of the small head end 32 can abut against the first step surface 23 for limiting position. The large head end 31 is provided with a second step surface 311, and the second step surface 311 is arranged toward the outer wall of the base 2 and can abut against it for limiting position.

[0030] like Figure 3 As shown, at least part of the shape of the large head end 31 corresponds to the inner shape of the connecting wall 22, and this part can fit the inner wall of the connecting wall 22, so that the reserved space inside the connecting wall 22 is sealed from the external environment; the large head end 31 is provided with a second step surface 311 facing the outer wall of the base 2, and the shape of the second step surface 311 corresponds to the outer wall of the base 2 inside the connecting wall 22. Figure 3 In the state shown, the second step surface 311 has not yet abutted against the outer wall of the base 2. If the pressing portion 11 continues to press toward the base 2, causing the large end 31 to be compressed to a greater extent, the second step surface 311 can abut against the outer wall of the base 2 to limit the large end 31 and prevent it from being squeezed into the wire hole 21.

[0031] The shape of the small head end 32 corresponds to the inner shape of the wire hole 21, and it can be inserted into the inside of the wire hole 21 and fit with the inner wall of the wire hole 21, so that the flow cavity 5 and the reserved space inside the connecting wall 22 remain sealed, and the inner wall of the wire hole 21 is provided with a first step surface 23, and part of the bottom surface of the small head end 32 can abut against the first step surface 23, so as to limit the small head end 32 and prevent it from being squeezed into the flow cavity 5.

[0032] In addition, in this embodiment, the outer walls of the large end 31 and the small end 32 are both conical structures, so that the large end 31 and the small end 32 can be more conveniently pressed and sealed to the connecting wall 22 and the wire hole 21.

[0033] In this embodiment, the big head end 31 and the small head end 32 are split structures. When the sealing structure of the ultrasonic water meter signal line is installed, the signal line needs to pass through the threading hole 33 in the elastic seal. If the elastic seal is an integrated structure, the threading step is more difficult. After the elastic seal is set as a split big head end 31 and a small head end 32, the signal line passes through the threading holes 33 of the small head end 32 and the big head end 31 in turn. The threading distance required for each threading is shorter, making the threading step simpler and improving the installation efficiency of the sealing structure of the ultrasonic water meter signal line.

[0034] In this embodiment, a clamping portion 11 is protruded from the corresponding positions on the upper surface of the meter head 1 and the elastic seal. The clamping portion 11 can press the elastic seal against the connecting wall 22 and the inside of the wire hole 21 when the connecting wall 22 is inserted into the connecting groove 12.

[0035] Please continue to refer to Figure 2 and Figure 3The pressing portion 11 is a protrusion arranged on the inner side of the connecting groove 12, and its shape corresponds to the upper surface of the elastic seal. When the connecting wall 22 is inserted into the connecting groove 12, the protrusion can abut against the upper surface of the elastic seal and continue to press it against the inside of the connecting wall 22 and the wire hole 21, thereby improving the sealing effect of the elastic seal.

[0036] The clamping part 11 is fixedly arranged on the inner side of the connecting groove 12, and the fixing method thereof is not limited in the present invention. For example, a snap connection, a threaded connection or an interference fit may be adopted, and the clamping part 11 may also be integrally formed with the meter head 1, which can also achieve the technical effect described above.

[0037] Since a threading hole 33 is formed through the middle of the elastic seal, and the signal line needs to be connected to the meter head 1 through the threading hole 33, the signal line needs to pass through the pressing portion 11 before it can be connected to the meter head 1. Figure 2 and Figure 3 As shown, in this embodiment, a connecting hole 111 is further provided at a position corresponding to the clamping portion 11 and the threading hole 33 for the signal line to pass through and connect to the meter head 1, that is, the signal line can be connected to the meter head 1 by passing through the wire hole 21, the threading hole 33 and the connecting hole 111 from the flow chamber 5 in sequence.

[0038] In addition, the size of the threading hole 33 and the connecting hole 111 should correspond to the size of the signal line. After the signal line passes through the threading hole 33 and the connecting hole 111, the outer surface of the signal line should also fit with the inner wall of the threading hole 33 and the inner wall of the connecting hole 111 to achieve a sealing effect. The size of the threading hole 33 can be slightly smaller than the size of the signal line so that the threading hole 33 can be close to the signal line to prevent the threading hole 33 from deforming itself when the clamping part 11 presses the elastic seal, resulting in a gap between its inner wall and the signal line, thereby improving the sealing effect.

[0039] In this embodiment, an elastic gasket 6 is further provided between the connecting wall 22 and the connecting groove 12. When the two are plugged in and pressed, the elastic gasket 6 can keep the interior of the connecting wall 22 sealed. Figure 1-3 As shown, the elastic gasket 6 can be set at the bottom of the connecting groove 12. When the connecting wall 22 is inserted into the connecting groove 12, the two are indirectly abutted through the elastic gasket 6. While keeping the interior of the connecting wall 22 sealed, it can also prevent the contact position between the connecting wall 22 and the connecting groove 12 from being damaged due to extrusion, collision, etc.

[0040] In the present embodiment, when the connecting wall 22 is inserted into the connecting groove 12, the two cannot be pressed and fixed by themselves. In other words, the meter head 1 needs to be pressed and fixed to the base 2 by other fixing structures so that the connecting wall 22 can be pressed and inserted into the connecting groove 12. The present invention does not limit the pressing and fixing method. The meter head 1 and the base 2 can be connected and pressed by bolts, or connected and pressed by flanges, or fixed by other methods.

[0041] like Figure 1 As shown, in this embodiment, a plurality of cylindrical structures are provided on the inner side of the connecting wall 22, and each cylindrical structure is hollow to form a corresponding plurality of first fixing holes 222. A plurality of second fixing holes (not shown in the figure) corresponding to the first fixing holes 222 are also provided on the inner side of the connecting groove 12. The meter head 1 can be fixed to the base 2 by fasteners 4 passing through each second fixing hole and the corresponding first fixing hole 222. The fasteners 4 can be bolts or screws, and the connecting wall 22 and the connecting groove 12 can be tightened and fixed by tightening the bolts or screws.

[0042] Specifically, in this embodiment, cylindrical structures are provided at the four inner corners of the rectangular connecting wall 22, and the large end 31 of the elastic sealing member is also provided with notches to avoid the cylindrical structures to correspond to the inner shape of the connecting wall 22 so that it can better fit the connecting wall 22 to achieve sealing.

[0043] Alternatively, corresponding flanges may be provided at corresponding positions of the outer wall of the connecting wall 22 and the meter head 1, the meter head 1 and the base 2 may be fixed by flange connection, and the connecting wall 22 and the connecting groove 12 may be compressed and fixed by controlling the distance between the two flanges.

[0044] In this embodiment, the elastic sealing member is made of rubber material. Compared with structural adhesive, rubber material has stronger corrosion resistance and heat resistance, can better adapt to the internal working conditions of ultrasonic water meters, has a longer service life, and indirectly extends the service life of ultrasonic water meters; and rubber material has a low cost, which can further reduce the overall cost of ultrasonic water meters.

[0045] The present invention also provides a sealing method for an ultrasonic water meter signal line. Based on the sealing structure of the ultrasonic water meter signal line described above, the specific steps are as follows:

[0046] Pass the signal wire through the wire hole 21 of the base 2 and the wire hole 33 of the small end 32 in sequence, and press the small end 32 into the wire hole 21;

[0047] Then, the signal line passing through the threading hole 33 of the small end 32 passes through the threading hole 33 of the large end 31 and the connecting hole 111 of the pressing part 11 and is connected to the meter head 1. After the large end 31 is pressed into the internal reserved space of the connecting wall 22, the elastic gasket 6 is placed in the connecting groove 12, and the connecting wall 22 is correspondingly inserted into the connecting groove 12;

[0048] The fastener 4 passes through the second fixing hole of the meter head 1 and the first fixing hole 222 of the base 2, and the meter head 1 and the base 2 are pressed and fixed. The elastic sealing member is pressed by the pressing part 11 to the connecting wall 22 of the base 2 and the inside of the wire hole 21, so that the flow chamber 5 remains sealed.

[0049] By adopting the above method, the sealing structure of the ultrasonic water meter signal line has a high assembly efficiency.

[0050] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A sealing structure for an ultrasonic water meter signal line, arranged at the connection between a meter head (1) and a line hole (21) of a base (2) of an ultrasonic water meter, characterized in that: The outer wall of the base body (2) extends outwardly to form an annular connecting wall (22) around the wire hole (21); the meter head (1) is provided with a connecting groove (12) corresponding to the connecting wall (22); an elastic sealing member is provided inside the connecting wall (22); at least a portion of the elastic sealing member can be inserted into the wire hole (21); when the connecting wall (22) and the connecting groove (12) are plugged and fixed, the elastic sealing member can be pressed against the inside of the connecting wall (22) and the wire hole (21) to keep the flow cavity (5) sealed; a threading hole (33) is provided inside the elastic sealing member to allow the signal line to be connected to the meter head (1); The elastic sealing member comprises a large head end (31) and a small head end (32); the shape of the large head end (31) corresponds to the inner shape of the connecting wall (22); and the small head end (32) can be inserted into the wire hole (21).

2. The sealing structure of the ultrasonic water meter signal line according to claim 1, characterized in that: The inner wall of the wire hole (21) is provided with a first step surface (23), and at least a portion of the bottom surface of the small head end (32) can abut against the first step surface (23) for limiting position; the large head end (31) is provided with a second step surface (311), and the second step surface (311) is arranged toward the outer wall of the base body (2) and can abut against the outer wall for limiting position; And / or, the large head end (31) and the small head end (32) are split structures.

3. The sealing structure of the ultrasonic water meter signal line according to claim 1 or 2, characterized in that: A pressing portion (11) is protrudingly provided at corresponding positions on the upper surface of the meter head (1) and the elastic sealing member, and the pressing portion (11) can press the elastic sealing member against the connecting wall (22) and the inside of the wire hole (21) when the connecting wall (22) is inserted into the connecting groove (12).

4. The sealing structure of the ultrasonic water meter signal line according to claim 3, characterized in that: A communicating hole (111) is provided at a position corresponding to the pressing portion (11) and the threading hole (33) of the elastic sealing component, and the signal line can sequentially pass through the line hole (21), the threading hole (33) and the communicating hole (111) to be connected to the meter head (1).

5. The sealing structure of the ultrasonic water meter signal line according to claim 1 or 2, characterized in that: An elastic gasket (6) is also provided between the connecting wall (22) and the connecting groove (12); when the two are plugged in and pressed tightly, the elastic gasket (6) can keep the interior of the connecting wall (22) sealed.

6. The sealing structure of the ultrasonic water meter signal line according to claim 1 or 2, characterized in that: The base body (2) is provided with a plurality of first fixing holes (222), the meter head (1) is provided with a plurality of second fixing holes corresponding to the first fixing holes (222), and the meter head (1) can be fixed to the base body (2) by fasteners (4) passing through the second fixing holes and the corresponding first fixing holes (222).

7. The sealing structure of the ultrasonic water meter signal line according to claim 6, characterized in that: The fastener (4) is a bolt or a screw.

8. The sealing structure of the ultrasonic water meter signal line according to claim 1 or 2, characterized in that: The outer wall of the connecting wall (22) and the corresponding positions of the meter head (1) are both provided with flanges, and the meter head (1) and the base body (2) are connected by the flanges to be pressed and fixed; And / or, the elastic sealing member is made of rubber.

9. A method for sealing an ultrasonic water meter signal line, based on the sealing structure of an ultrasonic water meter signal line according to any one of claims 1 to 8, characterized in that: The specific steps are as follows: The signal wire is passed through the wire hole (21) of the base (2) and the wire threading hole (33) of the elastic seal in sequence and connected to the meter head (1); the portion of the elastic seal corresponding to the wire hole (21) is inserted into the wire hole (21); the connecting groove (12) of the meter head (1) and the connecting wall (22) of the base (2) are plugged and pressed and fixed; the elastic seal is pressed by the meter head (1) against the connecting wall (22) of the base (2) and the inside of the wire hole (21), so that the flow chamber (5) remains sealed.

Images