Downward-opening door water meter

Abstract

The utility model discloses a down-opening water meter which comprises a meter shell, an impeller cavity is arranged in the meter shell, the meter shell is provided with an opening, an installation part is arranged on the outer side of the meter shell, the installation part is arranged on the side, away from the opening, of the meter shell, the meter shell is further provided with a cover plate, an installation plate is arranged in the meter shell, and the cover plate is arranged on the installation part. A rotating through hole is formed in the middle of the mounting plate; the impeller assembly is installed in the impeller cavity, the impeller assembly comprises an impeller body and first magnetic steel, the impeller body is provided with an impeller shaft, the first magnetic steel is arranged at the end of the impeller shaft, and a rotating shaft is further arranged at the end of the impeller shaft; and the counter is installed on the outer side of the meter shell, the counter is installed on the installation part, the counter comprises a counter shell and a counter gear shaft, and the end part of the counter gear shaft is provided with second magnetic steel. The sealing structure of the water meter is optimized, and the metering precision of the water meter is improved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of water meter measurement, in particular to a bottom-opening water meter. Background Art

[0002] Dry multi-flow rotary vane water meters are widely used in many countries and regions. Their operating principle is based on multiple streams of water entering tangentially from the water inlet of the impeller box, impacting the blades of the meter's impeller. The impeller's rotational speed is proportional to the water's impact velocity, and therefore to the amount of water flowing through it. Advantages of dry multi-flow rotary vane water meters: Because they use an impeller box to rectify the water flow, the flow is more fully rectified, the meter's accuracy requirements for the length of straight pipes before and after installation are lower, and the flow performance is more stable. Because the counter of dry multi-flow rotary vane water meters is sealed, the impeller rotates through a magnet to drive the counter gear, achieving counting. Therefore, the counter is dry, and its readings are unaffected by scale and other factors within the meter, ensuring consistent readings. Existing water meters generally achieve sealing by placing a sealing plate between the impeller chamber and the counter chamber. However, this structure is susceptible to external factors over long-term use, resulting in a decrease in sealing performance and, in turn, affecting the meter's accuracy. Therefore, the present utility model proposes an improved bottom-opening water meter structure. Utility Model Content

[0003] The utility model provides a bottom-opening water meter, which optimizes the sealing structure of the water meter and improves the measurement accuracy of the water meter to a certain extent.

[0004] In order to solve the above technical problems, the utility model provides a bottom-opening water meter, which is characterized by comprising:

[0005] A watch case having an impeller cavity therein, the watch case having an opening, a mounting portion being provided on the outer side of the watch case, the mounting portion being provided on a side of the watch case away from the opening, the watch case further being provided with a cover plate, the cover plate being provided over the opening, a mounting plate being provided inside the watch case, the position of the mounting plate corresponding to the position of the mounting portion, and a rotation through hole being provided in the middle of the mounting plate;

[0006] an impeller assembly, the impeller assembly being mounted in the impeller cavity, the impeller assembly comprising an impeller body and a first magnetic steel, the impeller body being provided with an impeller shaft, the first magnetic steel being provided at an end of the impeller shaft, the end of the impeller shaft being further provided with a rotating shaft, the rotating shaft being rotatably inserted into the rotating through hole;

[0007] A counter is mounted on the outside of the watch case, the counter is mounted on the mounting portion, the counter includes a counter housing and a counter gear shaft, a second magnet is provided at the end of the counter gear shaft, the second magnet is provided in the counter housing, and the position of the first magnet corresponds to the position of the second magnet.

[0008] As a preferred embodiment of the above technical solution, the middle part of the mounting plate extends toward the first side to form a rotating part, the rotating through hole is opened in the middle of the rotating part, a limiting part is provided at the first end of the rotating part, a bushing and a corundum bearing are provided in the rotating through hole, the outer wall of the bushing abuts against the inner wall of the rotating through hole, one end of the bushing abuts against the limiting part, the other end of the bushing is flush with the second side of the mounting plate, the corundum bearing is provided in the bushing, and one end of the corundum bearing is flush with the second side of the mounting plate.

[0009] As a preferred embodiment of the above technical solution, the middle part of the mounting plate extends toward the first side to form an annular protrusion, a first rotating groove is formed between the annular protrusion and the rotating part, a magnetic rotating part is provided at the end of the impeller shaft, the first magnet is provided on the magnetic rotating part, and the magnetic rotating part is located in the first rotating groove.

[0010] As a preferred embodiment of the above technical solution, a second rotation groove is formed between the magnetic rotation part and the rotation shaft, and the rotation part is located in the second rotation groove.

[0011] As a preferred embodiment of the above technical solution, the watch case also includes a water inlet and a water outlet, both of which are connected to the impeller chamber, and the impeller assembly also includes an impeller shell, a first sealing portion is provided in the middle of the impeller shell, and a second sealing portion is provided on the inner side wall of the impeller chamber of the watch case, and the first sealing portion and the second sealing portion are sealed and connected by a sealing member.

[0012] As a preferred embodiment of the above technical solution, the first sealing portion is provided with a first conical sealing surface, the second sealing portion is provided with a second conical sealing surface, the sealing member is an annular sealing member, one end of the annular sealing member extends inwardly and axially to form a conical sealing portion, the inner side of the conical sealing portion abuts against the first conical sealing surface, and the outer side of the conical sealing portion abuts against the second conical sealing surface.

[0013] As a preferred embodiment of the above technical solution, an annular positioning groove and a positioning protrusion are provided on the mounting plate, and an annular positioning part and a positioning hole are provided inside the watch case, the annular positioning part is inserted in the annular positioning groove, and the positioning protrusion is inserted in the positioning hole.

[0014] As a preferred embodiment of the above technical solution, a plurality of reinforcing ribs are provided on the mounting plate.

[0015] As a preferred embodiment of the above technical solution, a positioning groove is provided in the middle of the mounting portion, a positioning portion is provided in the counter housing, the positioning groove and the positioning portion are matched in a concave-convex manner, and the second magnetic steel is provided in the positioning portion.

[0016] The utility model provides a bottom-opening water meter, characterized in that it includes: a case, an impeller assembly and a counter; the case has an opening, and a mounting portion is provided on the outside of the case, the mounting portion is provided on a side of the case away from the opening, the cover plate is provided at the opening, and the counter is installed on the mounting portion. Specifically, the opening is provided at the bottom of the case, and the mounting portion is provided at the top of the case. During assembly, the counter is installed at the top of the case, and the impeller assembly is inserted into the impeller cavity from the opening at the bottom of the case; the rotation of the impeller body drives the first magnet to rotate, thereby driving the second magnet of the counter to rotate, and finally driving the counter gear shaft to rotate to achieve counting; by arranging the counter on the outside of the case, it can be prevented that water in the case enters the counter during use, thereby optimizing the sealing structure of the water meter and improving the accuracy of water meter measurement to a certain extent.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a bottom-opening water meter in an embodiment of the present utility model;

[0019] Figure 2 This is a structural diagram of a bottom-opening water meter in an embodiment of the utility model;

[0020] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0021] Figure 4 for Figure 2 A partial enlarged view of point B in the middle;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of a mounting plate for a bottom-hung water meter in an embodiment of the present utility model;

[0023] In the figure: 1. case; 2. mounting plate; 3. impeller assembly; 4. counter; 5. seal; 101. impeller chamber; 102. opening; 103. mounting portion; 104. cover plate; 105. water inlet; 106. water outlet; 107. second sealing portion; 108. second conical sealing surface; 109. annular positioning portion; 110. positioning hole; 111. positioning groove; 201. rotating through hole; 202. rotating portion; 203. limiting portion; 204. bushing; 205. corundum bearing; 206. Annular protrusion; 207, first rotating groove; 208, annular positioning groove; 209, positioning protrusion; 210, reinforcing rib; 301, impeller body; 302, first magnet; 303, impeller shaft; 305, rotating shaft; 306, magnetic rotating part; 307, second rotating groove; 308, impeller shell; 309, first sealing part; 310, first conical sealing surface; 401, counter housing; 402, counter gear shaft; 403, second magnet; 404, positioning part; 501, conical sealing part. DETAILED DESCRIPTION

[0024] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0025] See also Figures 1 to 5 The present invention provides a bottom-opening water meter, which is characterized by comprising:

[0026] A watch case 1 having an impeller chamber 101 therein, the watch case 1 having an opening 102, a mounting portion 103 being provided on the outside of the watch case 1, the mounting portion 103 being provided on a side of the watch case 1 away from the opening 102, the watch case 1 further comprising a cover plate 104, the cover plate 104 being provided to cover the opening 102, a mounting plate 2 being provided inside the watch case 1, the position of the mounting plate 2 corresponding to the position of the mounting portion 103, and a rotation through hole 201 being provided in the middle of the mounting plate 2;

[0027] An impeller assembly 3 is installed in the impeller chamber 101 and includes an impeller body 301 and a first magnetic steel 302. The impeller body 301 is provided with an impeller shaft 303. The first magnetic steel 302 is provided at the end of the impeller shaft 303. A rotating shaft 305 is also provided at the end of the impeller shaft 303. The rotating shaft 305 is rotatably inserted into the rotating through hole 201.

[0028] The counter 4 is mounted on the outside of the watch case 1 and on the mounting portion 103. The counter 4 includes a counter housing 401 and a counter gear shaft 402. A second magnet 403 is provided at the end of the counter gear shaft 402. The second magnet 403 is provided in the counter housing 401. The position of the first magnet 302 corresponds to the position of the second magnet 403.

[0029] The present invention provides a bottom-opening water meter, characterized in that it includes: a meter case 1, an impeller assembly 3 and a counter 4; the meter case 1 has an opening 102, and a mounting portion 103 is provided on the outer side of the meter case 1, the mounting portion 103 is provided on a side of the meter case 1 away from the opening 102, the cover plate 104 is provided on the opening 102, and the counter 4 is installed on the mounting portion 103. Specifically, the opening 102 is provided below the meter case 1, and the mounting portion 103 is provided above the meter case 1. When assembled, the counter 4 is installed above the watch case 1, and the impeller assembly 3 is installed into the impeller chamber 101 through the opening 102 at the bottom of the watch case 1; the rotation of the impeller body 301 drives the first magnetic steel 302 to rotate, thereby driving the second magnetic steel 403 of the counter 4 to rotate, and finally driving the counter gear shaft 402 to rotate to achieve counting; by arranging the counter 4 outside the watch case 1, it is possible to prevent water in the watch case 1 from entering the counter 4 during use, thereby optimizing the sealing structure of the water meter and improving the measurement accuracy of the water meter to a certain extent.

[0030] In a further feasible embodiment of this embodiment, the middle part of the mounting plate 2 extends toward the first side to form a rotating portion 202, the rotating through hole 201 is opened in the middle part of the rotating portion 202, the first end of the rotating portion 202 is provided with a limiting portion 203, and a bushing 204 and a corundum bearing 205 are provided in the rotating through hole 201, the outer wall of the bushing 204 abuts against the inner wall of the rotating through hole 201, one end of the bushing 204 abuts against the limiting portion 203, and the other end of the bushing 204 is flush with the second side of the mounting plate 2, the corundum bearing 205 is provided in the bushing 204, and one end of the corundum bearing 205 is flush with the second side of the mounting plate 2.

[0031] In this embodiment, the bushing 204 is disposed in the rotating through hole 201, and the corundum bearing 205 is disposed within the bushing 204. The corundum bearing 205 cooperates with the rotating shaft 305 to ensure the stability and wear resistance of the rotating shaft 305 during rotation. Furthermore, the design of the bushing 204 provides good support for the rotating shaft 305 during high-speed rotation, reducing wear caused by friction and extending the service life of the water meter. During assembly, when installing the mounting plate 2 into the watch case 1, the mounting plate 2 needs to be attached to the inner wall of the watch case 1, so that the distance between the first magnet 302 and the second magnet 403 is closer, reducing the energy loss during the magnetic transmission process, thereby improving the metering accuracy of the water meter, the bushing 204 and the corundum bearing 205 are installed in the rotating through hole 201 from the second side of the mounting plate 2, and the rotating shaft 305 is installed in the rotating through hole 201 from the first side of the mounting plate 2. This assembly method makes the limiting portion 203 located close to the first side of the mounting plate 2, which can avoid increasing the overall thickness of the mounting plate 2, thereby further making the distance between the first magnet 302 and the second magnet 403 closer, reducing the energy loss during the magnetic transmission process, and further improving the metering accuracy of the water meter.

[0032] In a further embodiment of the present invention, the middle portion of the mounting plate 2 extends toward the first side to form an annular protrusion 206, a first rotating groove 207 is formed between the annular protrusion 206 and the rotating portion 202, a magnetic rotating portion 306 is provided at the end of the impeller shaft 303, the first magnet 302 is provided on the magnetic rotating portion 306, and the magnetic rotating portion 306 is located in the first rotating groove 207.

[0033] In this embodiment, the first magnetic steel 302 is disposed on the magnetic rotating portion 306, which is located within the first rotating groove 207. This allows the magnetic rotating portion 306 to rotate more smoothly, effectively reducing reading errors caused by the shaking of the impeller body 301 and improving the stability and accuracy of the water meter. Furthermore, the cooperation between the magnetic rotating portion 306 and the first rotating groove 207 provides a positioning effect, improving assembly convenience and increasing production efficiency.

[0034] In a further embodiment of the present invention, a second rotation groove 307 is formed between the magnetic rotation portion 306 and the rotation shaft 305 , and the rotation portion 202 is located in the second rotation groove 307 .

[0035] In this embodiment, a second rotating groove 307 is formed between the magnetic rotating part 306 and the rotating shaft 305, and the rotating part 202 is located in the second rotating groove 307, so that the impeller body 301 rotates more smoothly, effectively reducing the reading error caused by the shaking of the impeller body 301, and improving the stability and accuracy of the water meter.

[0036] In a further embodiment of this embodiment, the watch case 1 also includes a water inlet 105 and a water outlet 106, and the water inlet 105 and the water outlet 106 are both connected to the impeller chamber 101. The impeller assembly 3 also includes an impeller shell 308, and a first sealing portion 309 is provided in the middle of the impeller shell 308. The inner side wall of the impeller chamber 101 of the watch case 1 is provided with a second sealing portion 107, and the first sealing portion 309 and the second sealing portion 107 are sealed and connected by a seal 5.

[0037] In this embodiment, a first sealing portion 309 is provided in the middle of the impeller housing 308, and a second sealing portion 107 is provided on the inner wall of the impeller cavity 101 of the watch case 1. The first sealing portion 309 and the second sealing portion 107 are sealed and connected by a seal 5. By providing the seal 5, water flows from the water inlet 105 into the impeller assembly 3 and then flows out from the water outlet 106, thereby preventing the water from flowing directly to the water outlet 106 and affecting the accuracy of the water meter reading.

[0038] In a further embodiment of the present invention, the first sealing portion 309 is provided with a first conical sealing surface 310, the second sealing portion 107 is provided with a second conical sealing surface 108, the sealing member 5 is an annular sealing member 5, one end of the annular sealing member 5 extends inwardly and axially to form a conical sealing portion 501, the inner side of the conical sealing portion 501 abuts against the first conical sealing surface 310, and the outer side of the conical sealing portion 501 abuts against the second conical sealing surface 108.

[0039] In this embodiment, the first sealing portion 309 is provided with a first conical sealing surface 310, the second sealing portion 107 is provided with a second conical sealing surface 108, and the sealing member 5 is further provided with a conical sealing portion 501. When assembling the impeller assembly 3, the first conical sealing surface 310, the second conical sealing surface 108 and the conical sealing portion 501 cooperate to achieve an automatic alignment effect, thereby improving assembly efficiency, improving sealing performance, and reducing the problem of inaccurate water meter readings caused by poor sealing.

[0040] In a further feasible embodiment of this embodiment, an annular positioning groove 208 and a positioning protrusion 209 are provided on the mounting plate 2, and an annular positioning portion 404 and a positioning hole 110 are provided inside the watch case 1, the annular positioning portion 404 is inserted into the annular positioning groove 208, and the positioning protrusion 209 is inserted into the positioning hole 110.

[0041] In this embodiment, the annular positioning portion 404 is inserted into the annular positioning groove 208, and the positioning protrusion 209 is inserted into the positioning hole 110, thereby achieving precise alignment between the impeller assembly 3 and the meter housing 1, ensuring assembly accuracy between the components, further reducing potential sources of error, and improving the meter's measurement accuracy. In addition, this design facilitates future maintenance and replacement, improving the long-term reliability of the water meter.

[0042] In a further embodiment of the present invention, a plurality of reinforcing ribs 210 are provided on the mounting plate 2 .

[0043] In this embodiment, the mounting plate 2 is provided with a plurality of reinforcing ribs 210, which enhance the structural strength of the mounting plate 2 and extend the service life of the water meter. The ribs 210 are radially distributed, effectively dispersing the stress generated by the impeller assembly 3 during high-speed rotation, reducing wear caused by vibration and extending the overall service life of the water meter.

[0044] In a further embodiment of the present invention, a positioning groove 111 is provided in the middle of the mounting portion 103 , a positioning portion 404 is provided in the counter housing 401 , the positioning groove 111 and the positioning portion 404 are matched in a concave-convex manner, and the second magnet 403 is provided in the positioning portion 404 .

[0045] In this embodiment, the positioning groove 111 and the positioning portion 404 are matched in a concave-convex manner to achieve precise alignment between the counter 4 and the case 1, ensuring the accuracy of assembly between components, further reducing potential error sources, and improving the measurement accuracy of the water meter.

[0046] In the description of this specification, reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless they are mutually inconsistent.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0048] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A bottom-opening water meter, characterized in that: include: A watch case having an impeller cavity therein, the watch case having an opening, a mounting portion being provided on the outer side of the watch case, the mounting portion being provided on a side of the watch case away from the opening, the watch case further being provided with a cover plate, the cover plate being provided over the opening, a mounting plate being provided inside the watch case, the position of the mounting plate corresponding to the position of the mounting portion, and a rotation through hole being provided in the middle of the mounting plate; an impeller assembly, the impeller assembly being mounted in the impeller cavity, the impeller assembly comprising an impeller body and a first magnetic steel, the impeller body being provided with an impeller shaft, the first magnetic steel being provided at an end of the impeller shaft, the end of the impeller shaft being further provided with a rotating shaft, the rotating shaft being rotatably inserted into the rotating through hole; A counter is mounted on the outside of the watch case, the counter is mounted on the mounting portion, the counter includes a counter housing and a counter gear shaft, a second magnet is provided at the end of the counter gear shaft, the second magnet is provided in the counter housing, and the position of the first magnet corresponds to the position of the second magnet.

2. The bottom-opening water meter according to claim 1, characterized in that: The middle part of the mounting plate extends toward the first side to form a rotating portion, the rotating through hole is opened in the middle of the rotating portion, a limiting portion is provided at the first end of the rotating portion, a bushing and a corundum bearing are provided in the rotating through hole, the outer wall of the bushing abuts against the inner wall of the rotating through hole, one end of the bushing abuts against the limiting portion, the other end of the bushing is flush with the second side of the mounting plate, the corundum bearing is provided in the bushing, and one end of the corundum bearing is flush with the second side of the mounting plate.

3. The bottom-opening water meter according to claim 2, characterized in that: The middle part of the mounting plate extends toward the first side to form an annular protrusion, a first rotating groove is formed between the annular protrusion and the rotating part, a magnetic rotating part is provided at the end of the impeller shaft, the first magnet is provided on the magnetic rotating part, and the magnetic rotating part is located in the first rotating groove.

4. The bottom-opening water meter according to claim 3, characterized in that: A second rotation groove is formed between the magnetic rotation part and the rotation shaft, and the rotation part is located in the second rotation groove.

5. The bottom-opening water meter according to claim 1, characterized in that: The watch case also includes a water inlet and a water outlet, both of which are connected to the impeller chamber. The impeller assembly also includes an impeller shell, a first sealing portion is provided in the middle of the impeller shell, and a second sealing portion is provided on the inner side wall of the impeller chamber of the watch case. The first sealing portion and the second sealing portion are sealed and connected by a sealing member.

6. The bottom-opening water meter according to claim 5, characterized in that: The first sealing portion is provided with a first conical sealing surface, the second sealing portion is provided with a second conical sealing surface, the sealing member is an annular sealing member, one end of the annular sealing member extends inwardly and axially to form a conical sealing portion, the inner side of the conical sealing portion abuts against the first conical sealing surface, and the outer side of the conical sealing portion abuts against the second conical sealing surface.

7. The bottom-opening water meter according to claim 1, characterized in that: An annular positioning groove and a positioning protrusion are provided on the mounting plate, and an annular positioning portion and a positioning hole are provided inside the watch case. The annular positioning portion is inserted into the annular positioning groove, and the positioning protrusion is inserted into the positioning hole.

8. The bottom-opening water meter according to claim 7, characterized in that: The mounting plate is provided with a plurality of reinforcing ribs.

9. The bottom-opening water meter according to claim 1, characterized in that: A positioning groove is provided in the middle of the mounting portion, a positioning portion is provided in the counter housing, the positioning groove and the positioning portion are matched with each other in a concave-convex manner, and the second magnetic steel is provided in the positioning portion.

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