Normally closed ultrasonic gas meter

Abstract

The utility model provides a normally closed type ultrasonic gas meter which comprises a shell and a gas meter body installed in the shell, the shell is connected with a gas inlet pipe and a gas outlet pipe, the gas inlet end of the gas inlet pipe is connected with an electromagnetic valve, and the gas inlet pipe and the gas outlet pipe are each provided with a detection assembly connected with the electromagnetic valve. The detection assembly comprises a detector and a connecting cylinder rotationally installed on the gas inlet pipe, the connecting cylinder is in threaded connection with the shell, a detection cavity is formed between the connecting cylinder and the shell, and the detector is connected with the detection cavity and used for detecting the gas concentration in the detection cavity; a controller is installed on the electromagnetic valve, and the detector is connected with the controller and used for controlling opening or closing of the electromagnetic valve. According to the gas meter, the problems that in the prior art, the connection position of the gas meter and the gas pipe is not sealed completely, and leakage is prone to occurring at the pipeline connection position can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas meters, and in particular relates to a normally closed ultrasonic gas meter. Background Art

[0002] The working principle of the ultrasonic gas meter is to use the influence of the propagation speed of ultrasonic waves on the flow rate of gas to measure the volume flow of gas. The ultrasonic gas meter is a fully electronic gas meter with no mechanical moving parts. It has the advantages of small size, light weight, low pressure loss and convenient remote transmission of meter reading data.

[0003] When the ultrasonic gas meter is working, the pressurized gas will fill the entire cavity of the meter case, causing the meter case to be slightly deformed. During the deformation process, the module bracket and the core components installed on the module bracket will be offset together, causing the flow field of the gas flowing through the core module to change, which is very detrimental to the accurate measurement of the ultrasonic gas meter. In order to solve the problems existing in the prior art, the utility model with publication number CN217276341U discloses an ultrasonic gas meter (hereinafter referred to as prior art 1), including a shell, one side of which is fixedly provided with two joints connected to the outlet pipe and the inlet pipe, and the joints pass through the shell; a flat plate structure, which is provided with a mounting hole, the joint passes through the mounting hole and is fixedly connected to the flat plate structure; a mounting bracket, the first end of which is fixedly connected to the flat plate structure through a first fixing component; a module, which is connected to the joint and is fixedly connected to the second end of the mounting bracket through a second fixing component.

[0004] Although the existing technology 1 can ensure the installation stability between the module and the mounting bracket by setting a reinforcing rib structure and a flat plate mechanism; however, the connection between the existing gas meter and the gas pipe is not fully sealed, and leakage is prone to occur at the pipe connection, which greatly affects user safety. Utility Model Content

[0005] The purpose of the utility model is to provide a normally closed ultrasonic gas meter, which can solve the problems of incomplete sealing at the connection between the gas meter and the gas pipe and easy leakage at the pipe connection in the prior art during actual use.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A normally closed ultrasonic gas meter comprises a housing and a gas meter body mounted in the housing, the housing being connected to an inlet pipe and an outlet pipe, the inlet end of the inlet pipe being connected to an electromagnetic valve, and both the inlet pipe and the outlet pipe being mounted with a detection assembly connected to the electromagnetic valve;

[0008] The detection assembly includes a detector and a connecting tube rotatably mounted on the air inlet pipe, the connecting tube is threadedly connected to the housing, a detection cavity is formed between the connecting tube and the housing, and the detector is connected to the detection cavity and is used to detect the gas concentration in the detection cavity;

[0009] A controller is installed on the solenoid valve, and the detector is connected to the controller and is used to control the opening or closing of the solenoid valve.

[0010] Preferably, the shell includes an upper shell and a lower shell, and the upper shell and the lower shell are detachably connected.

[0011] Preferably, a protrusion is provided on the lower shell, and a groove for cooperating with the protrusion is provided on the upper shell.

[0012] Preferably, a sealing portion is installed in the groove.

[0013] Preferably, the cross-section of the sealing portion is semicircular, square or trapezoidal.

[0014] Preferably, a sealing sleeve is installed on the air intake pipe.

[0015] Preferably, a one-way valve is installed at the outlet end of the outlet pipe.

[0016] Preferably, a battery slot is provided on the housing, and a battery box for placing batteries is slidably installed in the battery slot.

[0017] Preferably, a pull plate is rotatably mounted on the battery box, and a clamping block is provided on the pull plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, after the air inlet pipe and the air outlet pipe are installed on the housing, the connecting tube installed on the air inlet pipe or the air outlet pipe is rotatably connected to the housing, so that a closed detection cavity is formed between the connecting tube and the housing; when a gas leak occurs at the connection between the housing and the air inlet pipe or the air outlet pipe, the leaked gas enters the detection cavity, and the detector connected to the detection cavity can detect the gas concentration in the detection cavity;

[0020] If the gas concentration in the detection chamber exceeds the standard, the detector will issue an alarm and transmit the signal to the controller, and the controller can control the solenoid valve to close, so that the user can deal with the gas leakage in time;

[0021] Furthermore, by providing the connecting tube, the gas in the shell can enter the connecting tube after leaking, which makes it easier for the detector to detect and prevents the gas from being released into the outside air and causing danger. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a three-dimensional diagram of the present utility model.

[0024] Figure 2 It is a structural diagram of the present utility model.

[0025] Figure 3 For this utility model Figure 2 A partial enlarged view of point A in the middle.

[0026] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0027] 101-shell, 102-inlet pipe, 103-outlet pipe, 104-solenoid valve, 105-detector, 106-connecting tube, 107-upper shell, 108-lower shell, 109-protrusion, 110-groove, 111-sealing part, 112-sealing sleeve, 113-battery slot, 114-battery box, 115-pull plate, 116 block. DETAILED DESCRIPTION

[0028] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0029] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the 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 invention, "plurality" means two or more, unless otherwise specifically defined.

[0031] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0032] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0034] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] See Figure 1-Figure 3This embodiment discloses a gas meter, specifically a normally closed ultrasonic gas meter, comprising a housing 101 and a gas meter body mounted within the housing 101. An inlet pipe 102 and an outlet pipe 103 are connected to the housing 101. An inlet end of the inlet pipe 102 is connected to an electromagnetic valve 104. Both the inlet pipe 102 and the outlet pipe 103 are mounted with a detection assembly connected to the electromagnetic valve 104.

[0036] The detection assembly includes a detector 105 and a connecting tube 106 rotatably mounted on the air inlet pipe 102. The connecting tube 106 is threadedly connected to the housing 101. A detection cavity is formed between the connecting tube 106 and the housing 101. The detector 105 is connected to the detection cavity and is used to detect the gas concentration in the detection cavity.

[0037] The solenoid valve 104 is equipped with a controller, and the detector 105 is connected to the controller and is used to control the opening or closing of the solenoid valve 104 .

[0038] In the present invention, after the air inlet pipe 102 and the air outlet pipe 103 are installed on the housing 101, the connecting tube 106 installed on the air inlet pipe 102 or the air outlet pipe 103 is screwed into the housing 101, so that a closed detection cavity is formed between the connecting tube 106 and the housing 101; when a gas leak occurs at the connection between the housing 101 and the air inlet pipe 102 or the air outlet pipe 103, the leaked gas enters the detection cavity, and the detector 105 connected to the detection cavity can detect the gas concentration in the detection cavity. If the gas concentration in the detection chamber exceeds the standard, the detector 105 will sound an alarm and transmit the signal to the controller electrically connected to the detector 105. The controller can then control the solenoid valve 104 to close, allowing the user to promptly address the gas leak. Furthermore, by providing the connecting tube 106, the gas leaking from the housing 101 can enter the connecting tube 106, facilitating detection by the detector 105 while preventing the gas from being released into the outside air and causing danger. In this example, the connecting tube 106 is rotatably sealed with the air inlet pipe 102 or the air outlet pipe 103. The detector 105 is a conventional gas detection device in the prior art, the solenoid valve 104 is a conventional valve body in the prior art, and the controller is a conventional control device in the prior art. Their structures and functions will not be elaborated on one by one here.

[0039] In some embodiments, the housing 101 includes an upper shell 107 and a lower shell 108, and the upper shell 107 and the lower shell 108 are detachably connected. The upper shell 107 and the lower shell 108 are detachably connected by bolts.

[0040] In some embodiments, a protrusion 109 is provided on the lower shell 108, and a groove 110 is provided on the upper shell 107 for mating with the protrusion 109. After the upper shell 107 and the lower shell 108 are connected by bolts, the protrusion 109 contacts the groove 110. The provision of the protrusion 109 and the groove 110 mating with the protrusion 109 can increase the contact area between the upper shell 107 and the lower shell 108, thereby preventing gas from leaking through the connection between the upper shell 107 and the lower shell 108.

[0041] In some embodiments, a sealing portion 111 is installed in the groove 110. The sealing portion 111 is made of rubber material, and the gap between the upper shell 107 and the lower shell 108 can be further sealed by providing the sealing portion 111.

[0042] In some embodiments, the cross-section of the sealing portion 111 is semicircular, square, or trapezoidal. In this embodiment, the sealing portion 111 is composed of multiple sealing portions, each of which has a semicircular cross-section. When the ultrasonic gas meter is in operation, the pressurized gas fills the entire housing 101, causing the housing 101 to slightly deform. During this deformation, when the upper housing 107 and the lower housing 108 deviate from each other, the sealing portions 111 are squeezed, causing the multiple sealing portions 111 to perform multi-stage sealing of the gap between the upper housing 107 and the lower housing 108. This prevents the gas from leaking through the connection between the upper housing 107 and the lower housing 108 after the housing 101 is slightly deformed.

[0043] In some embodiments, a sealing sleeve 112 is installed on the air inlet pipe 102. The sealing sleeve 112 is made of rubber material and is used to further seal the gap between the air inlet pipe 102 and the housing 101.

[0044] In some embodiments, a one-way valve is installed at the outlet end of the outlet pipe 103. The one-way valve can prevent the gas from flowing back into the housing 101.

[0045] In some embodiments, the housing 101 is provided with a battery slot 113, in which a battery box 114 for placing batteries is slidably mounted. The battery box 114 slidably mounted in the battery slot 113 facilitates the user to install and replace batteries.

[0046] In some embodiments, a pull plate 115 is rotatably mounted on the battery box 114, and a clamping block 116 is provided on the pull plate 115. A rotating rod is mounted on one end of the pull plate 115, and the pull plate 115 is rotatably mounted on the battery box 114 via the rotating rod. The clamping block 116 is provided at the rotating end of the pull plate 115 and is used to limit the pull plate 115 after contacting the gravel battery box 114, thereby facilitating the user to pull the battery box 114 through the pull plate 115.

[0047] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A normally closed ultrasonic gas meter, comprising a housing (101) and a gas meter body installed in the housing (101), wherein the housing (101) is connected to an air inlet pipe (102) and an air outlet pipe (103), characterized in that: The air inlet end of the air inlet pipe (102) is connected to a solenoid valve (104), and a detection component connected to the solenoid valve (104) is installed on both the air inlet pipe (102) and the air outlet pipe (103); The detection assembly comprises a detector (105) and a connecting cylinder (106) rotatably mounted on the air inlet pipe (102); the connecting cylinder (106) is threadedly connected to the housing (101); a detection cavity is formed between the connecting cylinder (106) and the housing (101); the detector (105) is connected to the detection cavity and is used to detect the gas concentration in the detection cavity; A controller is installed on the solenoid valve (104), and the detector (105) is connected to the controller and is used to control the opening or closing of the solenoid valve (104).

2. A normally closed ultrasonic gas meter according to claim 1, characterized in that: The housing (101) comprises an upper shell (107) and a lower shell (108), and the upper shell (107) and the lower shell (108) are detachably connected.

3. A normally closed ultrasonic gas meter according to claim 2, characterized in that: The lower shell (108) is provided with a protrusion (109), and the upper shell (107) is provided with a groove (110) for cooperating with the protrusion (109).

4. A normally closed ultrasonic gas meter according to claim 3, characterized in that: A sealing portion (111) is installed in the groove (110).

5. A normally closed ultrasonic gas meter according to claim 4, characterized in that: The cross section of the sealing portion (111) is semicircular, square or trapezoidal.

6. A normally closed ultrasonic gas meter according to claim 1, characterized in that: A sealing sleeve (112) is installed on the air intake pipe (102).

7. The normally closed ultrasonic gas meter according to claim 1, characterized in that: A one-way valve is installed at the outlet end of the outlet pipe (103).

8. The normally closed ultrasonic gas meter according to claim 1, characterized in that: A battery slot (113) is provided on the housing (101), and a battery box (114) for accommodating batteries is slidably installed in the battery slot (113).

9. A normally closed ultrasonic gas meter according to claim 8, characterized in that: A pull plate (115) is rotatably mounted on the battery box (114), and a clamping block (116) is provided on the pull plate (115).

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