Gas meter

Abstract

The embodiment of the utility model relates to the technical field of gas meters, and discloses a gas meter which comprises a shell, a metering module and a gas inlet pipe, the metering module and the gas inlet pipe are both located in the shell, the shell is provided with a base meter gas inlet and a base meter gas outlet, the gas inlet pipe comprises a first gas inlet end and a first gas outlet end, the first gas inlet end is connected with the base meter gas inlet, and the first gas outlet end is connected with the base meter gas outlet. The first air outlet end is communicated with the cavity. The first air outlet end of the air inlet pipe is provided with a filter screen. And the filter screen can filter solid impurities such as dust carried in the fuel gas, so that the impurities are isolated in the gas inlet pipe, and the impurities are prevented from entering the cavity. In this way, the impurity content of the gas in the cavity can be effectively reduced, the cleanliness of the gas can be effectively improved, damage to the metering module due to the fact that the impurity content of the gas is too high can be reduced or avoided, the metering precision of the gas meter is effectively improved, and the service life of the gas meter is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of gas meters, and in particular to a gas meter. Background Art

[0002] With the continuous development of society, the fuel people use for daily cooking has changed from conventional energy sources such as firewood and coal, which waste resources and cause serious pollution, to natural gas, coal gas, and even clean energy such as electricity. In the process of using clean energy, a gas meter is needed. The gas meter has an automatic accumulation function. Users can check the amount of gas used through the gas meter so that they can pay according to the amount of gas used.

[0003] A gas meter is usually equipped with a metering module to measure the gas volume. The performance of the metering module determines the accuracy of the gas meter's measurement. If some external factors affect or damage the metering module, it will directly affect the accuracy of the gas meter's measurement results. Gas will inevitably carry solid impurities such as dust when entering the gas meter. Impurities entering the metering module will directly affect the metering accuracy of the metering module. Moreover, long-term accumulation of impurities will also affect the service life of the gas meter. Utility Model Content

[0004] In view of this, the utility model provides a gas meter, which can effectively improve the measurement accuracy of the gas meter and extend the service life of the gas meter.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0006] The present application provides a gas meter, including:

[0007] A shell having a cavity, wherein the shell has a base surface air inlet and a base surface air outlet;

[0008] A metering module is located in the cavity;

[0009] An air inlet pipe is located in the cavity, the air inlet pipe comprises a first air inlet end and a first air outlet end, the first air inlet end is communicated with the base meter air inlet, and the first air outlet end is communicated with the cavity;

[0010] The first air outlet end of the air inlet pipe is provided with a filter screen.

[0011] In the embodiment of the present application, a filter can be provided at the first outlet end of the air inlet pipe. When the gas passes through the filter, the filter can filter out solid impurities such as dust carried in the gas, so that the impurities are isolated in the air inlet pipe, thereby preventing the impurities from entering the cavity. This can effectively reduce the impurity content of the gas in the cavity, effectively improve the cleanliness of the gas, reduce or avoid damage to the metering module due to excessive impurity content in the gas, thereby effectively improving the metering accuracy of the gas meter and extending the service life of the gas meter.

[0012] In a possible implementation, the air inlet pipe includes a main body and the filter, and the filter and the main body are an integrated structure.

[0013] In a possible implementation, the filter net has filter holes, and the diameter of the filter holes is 0.5 mm to 2 mm.

[0014] In a possible implementation, the air intake pipe further includes a support frame, and the support frame is located at the first air outlet end of the air intake pipe;

[0015] One end of the support frame is connected to the outer side wall of the air inlet pipe, and the other end is connected to the bottom wall of the shell.

[0016] In a possible implementation, the metering module includes a metering channel, and two ends of the metering channel respectively have a second air inlet end and a second air outlet end;

[0017] The air inlet pipe is a cylindrical structure, and the air inlet pipe extends from the top of the shell toward the bottom wall of the shell, and the second air inlet end of the metering module is arranged toward the side wall of the air inlet pipe.

[0018] In a possible implementation manner, a distance between the first air outlet end and the bottom wall of the shell is smaller than a distance between the second air inlet end and the bottom wall of the shell.

[0019] In a possible implementation manner, the distance between the first air outlet and the bottom wall of the shell is less than or equal to one third of the height of the shell.

[0020] In a possible implementation, the distance between the outer side wall of the air inlet pipe and the port of the second air inlet end is 5 mm to 10 mm.

[0021] In a possible implementation, the housing further includes a clamping portion, and the clamping portion is located on the bottom wall of the housing;

[0022] The clamping portion is provided with a clamping slot, and one end of the support frame connected to the shell is clamped in the clamping slot.

[0023] In a possible implementation, a sealing ring is further included, and the sealing ring is located between the air intake pipe and the base meter air intake port.

[0024] In a possible implementation, the housing includes an upper housing and a lower housing connected to each other;

[0025] The cavity is located on the lower shell, and the base surface air inlet and the base surface air outlet are both located on the upper shell.

[0026] In a possible implementation, it further includes a valve assembly, one end of the valve assembly is connected to the second air outlet end of the metering module, and the other end of the valve assembly is connected to the base meter air outlet of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 An exploded view of a gas meter provided in an embodiment;

[0029] Figure 2 A schematic diagram of the structure of an air intake pipe provided in an embodiment of the present application;

[0030] Figure 3 A cross-sectional view of a gas meter provided in an embodiment of the present application.

[0031] Description of reference numerals:

[0032] 100-gas meter;

[0033] 110-housing;

[0034] 111- cavity;

[0035] 112-base meter air inlet;

[0036] 113-base table air outlet;

[0037] 114-upper housing;

[0038] 115-lower housing;

[0039] 120-Metering module;

[0040] 121- metering flow channel;

[0041] 122 - second air inlet end;

[0042] 123- second air outlet;

[0043] 130-intake pipe;

[0044] 131- first air inlet end;

[0045] 132-first air outlet;

[0046] 133- filter;

[0047] 1331-filter hole;

[0048] 134-main body;

[0049] 135-support frame;

[0050] 140-seal ring;

[0051] 150-Valve body assembly. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0053] As mentioned in the above background technology, a metering module is usually installed in the gas meter to measure the gas volume. The performance of the metering module determines the accuracy of the gas meter measurement. If some external factors affect and damage the metering module, it will directly affect the accuracy of the gas meter measurement results. In the process of gas entering the gas meter, it is inevitable that solid impurities such as dust will be carried. Impurities entering the metering module will directly affect the metering accuracy of the metering module. Moreover, the long-term accumulation of impurities will also affect the service life of the gas meter.

[0054] Therefore, how to prevent dust and other impurities from entering the gas meter has become an urgent problem to be solved.

[0055] In order to solve the above problems, the embodiment of the present application provides a gas meter, which can be provided with a filter at the first gas outlet end of the inlet pipe. When the gas passes through the filter, the filter can pass the solid impurities such as dust carried in the gas, so that the impurities are isolated in the inlet pipe, thereby preventing the impurities from entering the cavity. In this way, the impurity content of the gas in the cavity can be effectively reduced, the cleanliness of the gas can be effectively improved, and the damage to the metering module caused by excessive impurity content in the gas can be reduced or avoided, thereby effectively improving the metering accuracy of the gas meter and extending the service life of the gas meter.

[0056] The gas meter provided in the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0057] Figure 1 An exploded view of a gas meter provided in an embodiment, Figure 2 A schematic diagram of the structure of an air intake pipe provided in an embodiment of the present application.

[0058] The present application embodiment provides a gas meter 100, which may be an ultrasonic gas meter. The gas meter 100 may be used to detect the amount of natural gas used. Figure 1 As shown, the gas meter 100 may include a housing 110 , a metering module 120 and an air inlet pipe 130 . The housing 110 may have a cavity 111 , and the metering module 120 and the air inlet pipe 130 may both be located in the cavity 111 of the housing 110 .

[0059] The housing 110 may be provided with a base meter air inlet 112 and a base meter air outlet 113. The air inlet pipe 130 may include a first air inlet end 131 and a first air outlet end 132. The first air inlet end 131 may be connected to the base meter air inlet 112. For example, the first air inlet end 131 and the base meter air inlet 112 may be connected by a snap-fitting manner. The first air outlet end 132 may be connected to the cavity 111 of the housing 110.

[0060] During the use of the gas meter 100, the gas can enter the inlet pipe 130 from the base meter inlet port 112 on the housing 110, and the gas in the inlet pipe 130 can enter the cavity 111 of the housing 110 through the first outlet port 132 on the inlet pipe 130. The gas in the cavity 111 can enter the metering module 120, and then reach the base meter outlet port 113 through the metering module 120. When passing through the metering module 120, the metering module 120 can calculate the gas usage to obtain the gas usage value.

[0061] The housing 110 may include an upper housing 114 and a lower housing 115, which may be arranged together to form a cavity 111, and the base meter air inlet 112 and the base meter air outlet 113 may both be located on the upper housing 114. The upper housing 114 may be removed from the lower housing 115 to facilitate installation and removal of internal components of the gas meter 100, and to facilitate maintenance and inspection of the gas meter 100.

[0062] The gas meter 100 may further include a valve assembly 150, one end of which may be connected to the metering module 120, and the other end of which may be connected to the base meter outlet 113 of the housing 110. After the gas enters the cavity 111 of the housing 110 through the gas inlet pipe 130, it may enter the metering module 120, and then enter the valve assembly 150 through the metering module 120 and flow out through the base meter outlet 113 of the housing 110.

[0063] Among them, see Figure 2 As shown, a filter screen 133 may be provided on the first gas outlet end 132 of the gas inlet pipe 130. When the gas passes through the filter screen 133, the filter screen 133 may filter out solid impurities such as dust carried in the gas, so that the impurities are isolated in the gas inlet pipe 130, thereby preventing the impurities from entering the cavity 111. In this way, the impurity content of the gas in the cavity 111 can be effectively reduced, the cleanliness of the gas can be effectively improved, and the damage of the metering module 120 caused by excessive impurity content in the gas can be reduced or avoided, thereby effectively improving the metering accuracy of the gas meter 100 and extending the service life of the gas meter 100.

[0064] Continue to see Figure 2 As shown, the air inlet pipe 130 may include a main body 134 and a filter 133 . The filter 133 and the main body 134 may be an integrated structure. For example, the filter 133 and the main body 134 may be formed into an integral structure by integral casting, stamping, etc.

[0065] This can effectively improve the reliability and firmness of the connection between the filter 133 and the main body 134, and can effectively reduce or avoid the occurrence of falling off or disconnection between the filter 133 and the main body 134, which helps to improve the overall structural stability of the intake pipe 130, thereby effectively improving the reliability and stability of the intake pipe 130 for gas filtration.

[0066] Among them, continue to see Figure 2 As shown, the filter screen 133 may be provided with a filter hole 1331, and the diameter of the filter hole 1331 may be D, and the value of D may be 0.5 mm to 2 mm. For example, the value of the diameter D of the filter hole 1331 may be 0.5 mm, 0.1 mm, 1.5 mm or 2 mm. The filter hole 1331 within this value range can effectively filter impurities and improve the cleanliness of the gas, while satisfying the requirement of the gas passing through, and reduce or avoid the excessive impurity content of the gas affecting the metering accuracy of the metering module 120.

[0067] Figure 3 A cross-sectional view of a gas meter provided in an embodiment of the present application.

[0068] Continue to see Figure 2 As shown, the air inlet pipe 130 may further include a support frame 135. The support frame 135 may be located at the first outlet end 132 of the air inlet pipe 130. Figure 3As shown, one end of the support frame 135 may be connected to the outer side wall of the air inlet pipe 130, and the other end may be connected to the bottom wall of the housing 110. For example, the support frame 135 and the outer wall of the air inlet pipe 130 may be connected by welding or the like, or the support frame 135 and the air inlet pipe 130 may also be an integrated structure. The other end of the support frame 135 abuts against the bottom wall of the housing 110, or may be connected by a clamping or the like.

[0069] The support frame 135 can support the air intake pipe 130, which can effectively reduce or prevent the air intake pipe 130 from falling off the base meter air inlet 112 of the shell 110, and help improve the stability and reliability of the air intake pipe 130 in the shell 110, thereby effectively improving the overall structural stability of the gas meter 100.

[0070] For example, the housing 110 may further include a clamping portion (not shown in the figure), which may be located on the bottom wall of the housing 110, and may have a clamping groove (not shown in the figure), and one end of the support frame 135 connected to the bottom wall of the housing 110 may be clamped in the clamping groove. In this way, the movement of the support frame 135 relative to the bottom wall of the housing 110 can be effectively reduced or avoided, and the firmness and reliability of the connection between the support frame 135 and the bottom wall of the housing 110 can be effectively improved, thereby effectively improving the reliability and stability of the air intake pipe 130 arranged in the housing 110.

[0071] See also Figure 3 As shown, the metering module 120 may include a metering flow channel 121, and the two sections of the metering flow channel 121 may respectively have a second air inlet end 122 and a second air outlet end 123. The first air inlet end 131 may be in communication with the cavity 111 of the housing 110, and the second air inlet end 122 may be in communication with the base meter air outlet 113 of the housing 110. For example, the second air outlet end 123 may be connected to the valve body assembly 150, so that the metering module 120 may be in communication with the base meter air outlet 113 on the housing 110 through the valve body assembly 150. The gas in the cavity 111 may enter the metering module 120 through the second air inlet end 122, so that the metering module 120 may perform metering.

[0072] The air inlet pipe 130 may be in a cylindrical shape, and may extend from the top of the housing 110 toward the bottom wall of the housing 110, and the second air inlet end 122 of the metering channel 121 may be disposed toward the side wall of the air inlet pipe 130. For example, the metering channel 121 may extend in a horizontal direction.

[0073] In the related art, the air inlet pipe is usually an L-shaped structure, and the air outlet end of the air inlet pipe is usually located below the metering module, so as to be offset from the air inlet end of the metering module. This will make the overall vertical size of the gas meter larger and increase the volume of the gas meter.

[0074] In the embodiment of the present application, the air inlet pipe 130 is extended from the top of the shell 110 toward the bottom wall of the shell 110, and the second air inlet end 122 of the metering channel 121 is arranged toward the side wall of the air inlet pipe 130. This can effectively reduce the space occupied by the air inlet pipe 130 in the vertical direction of the shell 110 (for example, compared with the air inlet pipe 130 with an L-shaped structure), which is beneficial to the layout of the internal space of the shell 110, contributes to the overall miniaturization design of the gas meter 100, and improves the miniaturization design of the gas meter 100.

[0075] Among them, continue to see Figure 3 As shown, the distance d1 between the first gas outlet 132 and the bottom wall of the housing 110 can be smaller than the distance d2 between the second gas inlet 122 and the bottom wall of the housing 110, so that the first gas outlet 132 and the second gas inlet 122 can be misaligned with each other, which can reduce or prevent the gas from flowing out of the first gas outlet 132 and directly entering the second gas inlet 122. When the gas flows out from the first gas outlet 132 and reaches the cavity 111 of the housing 110, it can first reach the bottom of the cavity 111, and gradually fill the cavity 111 from the bottom of the cavity 111, and finally enter the second gas inlet 122 of the metering module 120. In this way, it can effectively prevent the gas from flowing out of the first gas outlet 132 and directly entering the second gas inlet 122, thereby increasing the gas pressure at the second gas inlet 122, and can effectively reduce the gas flow pressure at the second gas inlet 122, thereby improving the detection accuracy of the gas meter 100.

[0076] Continue to see Figure 3 As shown, in the embodiment of the present application, the distance d1 between the first gas outlet 132 and the bottom wall of the housing 110 can be less than or equal to one third of the height h of the housing 110, that is, d1≤h / 3. In this way, under the premise that the gas flows out from the first gas outlet 132, the size occupied by the gas inlet pipe 130 in the vertical direction of the housing 110 can be effectively reduced, which is conducive to reducing the overall size of the housing 110 in the vertical direction, thereby effectively improving the miniaturization design of the gas meter 100.

[0077] Continue to see Figure 3As shown, the distance between the outer wall of the air inlet pipe 130 and the end of the second air inlet end 122 can be d3, and the value of d can be 5mm to 10mm. For example, the value of d3 can be 5mm, 8mm, 10mm, etc. This distance can allow the gas to smoothly enter the second air inlet end 122 and enter the metering flow channel 121 through the second air inlet end 122, which can effectively avoid the air inlet pipe 130 from obstructing the second air inlet end 122. Moreover, on the premise that the gas smoothly enters the metering flow channel 121, the distance between the air inlet pipe 130 and the metering module 120 can be effectively reduced, and the distance between the outer wall of the air inlet pipe 130 and the end of the second air inlet end 122 is effectively avoided to be too large to increase the size of the housing 110, which can effectively improve the compactness of the internal space layout of the housing 110 and enhance the miniaturization design of the gas meter 100 structure.

[0078] In addition, this distance can also effectively prevent the distance between the outer wall of the intake pipe 130 and the end of the second intake end 122 from being too small, thereby increasing the pressure of the gas at the second intake end 122, helping to reduce the pressure at the second intake end 122, thereby effectively meeting the pressure requirement at the second intake end 122.

[0079] Continue to see Figure 3 As shown, the gas meter 100 may further include a sealing ring 140, which may be located between the air inlet pipe 130 and the base meter air inlet port 112. For example, the air inlet pipe 130 may be inserted into the base meter air inlet port 112, and the sealing ring 140 may be located between the outer wall of the air inlet pipe 130 and the inner wall of the base meter air inlet port 112. The sealing ring 140 may provide a seal between the air inlet pipe 130 and the base meter air inlet port 112, and may effectively improve the sealing between the air inlet pipe 130 and the base meter air inlet port 112. This effectively reduces or avoids gas leakage, and helps to improve the safety of the gas meter 100.

[0080] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more groups.

[0081] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0082] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0083] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0084] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0085] The serial numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A gas meter, characterized in that: include: A shell having a cavity, wherein the shell has a base surface air inlet and a base surface air outlet; A metering module is located in the cavity; An air inlet pipe is located in the cavity, the air inlet pipe comprises a first air inlet end and a first air outlet end, the first air inlet end is communicated with the base meter air inlet, and the first air outlet end is communicated with the cavity; The first air outlet end of the air inlet pipe is provided with a filter screen.

2. The gas meter according to claim 1, characterized in that: The air inlet pipe comprises a main body and the filter, and the filter and the main body are an integrated structure.

3. The gas meter according to claim 1 or 2, characterized in that: The filter net is provided with filter holes, and the diameter of the filter holes is 0.5 mm to 2 mm.

4. The gas meter according to claim 1 or 2, characterized in that: The air inlet pipe further comprises a support frame, and the support frame is located at the first air outlet end of the air inlet pipe; One end of the support frame is connected to the outer side wall of the air inlet pipe, and the other end is connected to the bottom wall of the shell.

5. The gas meter according to claim 1 or 2, characterized in that: The metering module comprises a metering channel, and two ends of the metering channel respectively have a second air inlet end and a second air outlet end; The air inlet pipe is a cylindrical structure, and the air inlet pipe extends from the top of the shell toward the bottom wall of the shell, and the second air inlet end of the metering module is arranged toward the side wall of the air inlet pipe.

6. The gas meter according to claim 5, characterized in that: The distance between the first air outlet end and the bottom wall of the shell is smaller than the distance between the second air inlet end and the bottom wall of the shell.

7. The gas meter according to claim 1 or 2, characterized in that: The distance between the first air outlet and the bottom wall of the shell is less than or equal to one third of the height of the shell.

8. The gas meter according to claim 5, characterized in that: The distance between the outer side wall of the air inlet pipe and the port of the second air inlet end is 5 mm to 10 mm.

9. The gas meter according to claim 4, characterized in that: The housing further comprises a clamping portion, and the clamping portion is located on the bottom wall of the housing; The clamping portion is provided with a clamping slot, and one end of the support frame connected to the shell is clamped in the clamping slot.

10. The gas meter according to claim 1 or 2, characterized in that: It also includes a sealing ring, which is located between the air inlet pipe and the base meter air inlet.

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