Three-way type natural gas meter front pressure regulator

Abstract

The utility model discloses a three-way type natural gas meter front pressure regulator which comprises a valve body and a valve cover arranged on the top of the valve body, a gas inlet port and a gas outlet port which are communicated with each other are arranged on the valve body, a third open port is further arranged on the valve body, and the valve cover is arranged on the valve body. The third open port is communicated with the air inlet port and the air outlet port at the same time, a pressure regulating assembly is arranged in a valve body working cavity located among the air inlet port, the air outlet port and the third open port, and the pressure regulating assembly is matched with a pressure sensing assembly and a pressure bearing assembly which are arranged in the valve deck to achieve pressure regulation. The installation requirements in the horizontal direction and the vertical direction can be met in the installation process, so that the installation matching performance is higher, and the compatibility is better; a traditional lever structure is omitted, so that force transmission of the whole structure is more efficient, sensitivity and precision of the pressure regulator are improved, a diaphragm can be better fixed, sealing performance of products is improved, air leakage risks in pipeline connection are reduced, and use safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas pressure regulators, and particularly relates to a three-way natural gas pressure regulator before a gas meter. Background Art

[0002] A gas pressure regulator, commonly known as a pressure reducing valve, is also called a gas pressure regulating valve. It is a device that automatically changes the gas flow rate through a regulating valve to keep the outlet gas at a specified pressure.

[0003] In the prior art, such as the Chinese utility model patent with the publication number CN203963159U and the patent name of an indoor gas pressure regulator, an indoor gas pressure regulator is disclosed. In the existing indoor gas pressure regulator, since the valve shaft occupies the movement position of the diaphragm screw movement system, the positions of the diaphragm screw movement system and the pressure regulating spring have to be moved upward, thereby increasing the volume of the pressure regulator, wasting a lot of space inside the pressure regulator, and having an incompact structure. In the utility model, the valve shaft is arranged beside the diaphragm, and the lever is arranged at a horizontal position on one side of the valve shaft. An indoor gas pressure regulator is provided with increased pressure stabilization accuracy, reduced volume of the pressure regulator, small distortion, and high accuracy and sensitivity.

[0004] The pressure stabilization principle is as follows: Tighten the pressure regulating screw to compress the pressure-bearing spring, which acts on the diaphragm to make the pressure regulating component move, and then drive the valve shaft to move to the right through the rotation of the lever, so that the valve orifice gasket is separated from the copper valve nozzle, and natural gas enters the user pipeline from the outlet port.

[0005] In this way, through lever transmission, not only is the structure complex, but also the transmission efficiency is low, the sensitivity is poor, and the installation method is fixed, with poor matching. Content of the Utility Model

[0006] Aiming at the deficiencies in the prior art, the utility model provides a three-way natural gas pressure regulator before a gas meter with high compatibility, simple structure, and good adjustment sensitivity and accuracy.

[0007] To solve the above technical problems, the utility model is solved by the following technical solutions: A three-way natural gas pressure regulator before a gas meter includes a valve body and a valve cover arranged on the top of the valve body. The valve body is provided with an intake port and an outlet port that are interconnected, and the valve body is further provided with a third open port. The third open port is simultaneously connected to the intake port and the outlet port. A pressure regulating component is arranged in the working cavity of the valve body between the intake port, the outlet port, and the third open port, and is matched with a pressure sensing component and a pressure bearing component arranged in the valve cover to achieve pressure regulation. During the installation process, it can be compatible with the installation requirements in the horizontal and vertical directions, making the installation matching higher and the compatibility better.

[0008] In the above technical solution, the third open port is disposed at the lower end of the valve body perpendicular to the axes of the intake port and the outlet port.

[0009] In the above technical solution, a plug is disposed at the entrance of the third open port.

[0010] In the above technical solution, the setting dimension of the plug is the same as the dimension at the entrance of the intake port, and different installation directions can be switched, with better compatibility.

[0011] In the above technical solution, a plurality of mounting portions are provided on the valve body, including a first mounting position and a second mounting position at the top opening of the valve body, and a third mounting position in the working chamber of the valve body. The working surface of the first mounting position is lower than the horizontal plane where the eaves of the valve body are located, which can better fix the diaphragm and improve the sealing performance of the product.

[0012] In the above technical solution, the pressure regulating assembly includes a valve core, a connecting rod, and a valve plug. The valve core is installed through the third mounting position. The connecting rod is vertically movably disposed inside the valve core. The valve plug is connected to the lower working end of the connecting rod and is suspended in the working chamber of the valve body. The upper working end of the connecting rod extends out of the working chamber of the valve body and is connected to the sensing assembly inside the valve cover.

[0013] In the above technical solution, the pressure sensing assembly includes a diaphragm and a diaphragm plate. The diaphragm is connected to the valve body through the second mounting position. The diaphragm plate is disposed on the upper working surface of the diaphragm. A connecting seat is disposed on the lower working surface of the diaphragm. The connecting seat and the diaphragm plate are connected to the diaphragm by bolts. The lower end of the connecting seat is connected to the connecting rod.

[0014] In the above technical solution, the diaphragm and the diaphragm plate are coaxially arranged.

[0015] In the above technical solution, the valve cover is connected to the valve body through the first mounting position to form a pressure-bearing cavity.

[0016] In the above technical solution, a pressure-bearing assembly is disposed in the pressure-bearing cavity, including a pressure-bearing spring, an adjusting screw, and a pressure-regulating cover. The lower working end of the pressure-bearing spring abuts against the upper working surface of the diaphragm plate. The upper working end of the pressure-bearing spring is clamped in the installation groove of the adjusting screw. The adjusting screw is connected to the valve cover. The pressure-regulating cover covers the upper opening of the valve cover and is located above the adjusting screw.

[0017] Compared with the prior art, the utility model has the following beneficial effects: By setting a third open port on the valve body and cooperating with a plug to switch the installation directions of the air inlet and the air outlet, the installation requirements in both horizontal and vertical directions can be compatible during the installation process, resulting in higher installation matching and better compatibility; The traditional lever structure is cancelled, making the force transmission of the whole structure more efficient, improving the sensitivity and accuracy of the pressure regulator. The concave design at the first installation position of the valve body allows the valve cover to be embedded in the groove, which can better fix the diaphragm, improve the product's sealing performance, reduce the air leakage risk in pipeline connection, and enhance the use safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of the present utility model.

[0020] Figure 2 It is an exploded structural diagram of the present utility model.

[0021] Figure 3 It is a sectional structural diagram of the present utility model.

[0022] Figure 4 It is a sectional structural diagram of the valve body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present utility model will be further described in detail below with reference to the drawings.

[0024] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The following preferred embodiments are only examples, and those skilled in the art can think of other obvious deformations. The basic principles defined in the following description can be used in other implementation schemes, deformation schemes, improvement schemes, equivalent schemes, and other technical schemes without departing from the spirit and scope of the present utility model.

[0025] Those skilled in the art should understand that in the disclosure of the present utility model, the orientations or positions indicated by the terms "longitudinal", "lateral", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or position relationships shown in the drawings. It is only for the convenience of simplifying the description of the present utility model, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.

[0026] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of one component can be one, while in other embodiments, the number of this component can be multiple. The term "one" should not be construed as a limitation on the quantity.

[0027] See Figures 1 to 4 , a three-way natural gas pressure regulator before the gas meter, which includes a valve body 1 and a valve cover 2 arranged on the top of the valve body 1.

[0028] An air inlet port 11 and an air outlet port 12 that communicate with each other are arranged on the valve body 1. In order to enable the valve body 1 to meet various installation requirements, a third open port 13 is also arranged on the valve body. The third open port 13 is arranged at the lower end of the valve body 1 perpendicular to the axes of the air inlet port 11 and the air outlet port 12, and the third open port 13 is simultaneously communicated with the air inlet port 11 and the air outlet port 12.

[0029] Of course, during use, only one air inlet and one air outlet are required. Therefore, a plug 3 is arranged at the entrance of the third open port 13, and the setting size of the plug 3 is the same as the size at the entrance of the air inlet port 11. In this way, when the valve body 1 needs to be horizontally installed, the plug 3 is arranged at the opening of the third open port 13 to block the connection with the outside, and only the air inlet port 11 and the air outlet port 12 are used to complete the pipeline connection; when the valve body 1 needs to be vertically installed, the plug 3 is arranged at the opening of the air inlet port 11 to block the connection between the air inlet port 11 and the outside, and only the third open port 13 and the air outlet port 12 are used to complete the pipeline connection. In this way, the adaptability of the valve body in various installation environments can be higher, meeting various installation requirements, reducing the use of additional connectors, reducing the installation cost, and reducing the use of connectors also means reducing the connection points, reducing the air leakage risk in pipeline connection, and improving the safety of the entire pipeline.

[0030] In order to achieve the pressure regulating function, a pressure regulating component is arranged in the working chamber 10 of the valve body between the air inlet port 11, the air outlet port 12 and the third open port 13, and it cooperates with the pressure sensing component and the pressure bearing component arranged in the valve cover 2 to achieve pressure regulation.

[0031] A number of mounting parts are provided on the valve body 1, including a first mounting position 14 and a second mounting position 15 at the top opening of the valve body 1, and a third mounting position 16 within the working chamber 10 of the valve body. The working surface of the first mounting position 14 is lower than the horizontal plane where the eaves of the valve body 1 are located, that is, the first mounting position 14 has a concave structure, and the second mounting position 15 is a groove structure.

[0032] The pressure regulating assembly includes a valve core 41, a connecting rod 42, and a valve plug 43. The valve core 41 is installed through the third mounting position 16. The connecting rod 42 is vertically movably arranged within the valve core 41. The valve plug 43 is connected to the lower working end of the connecting rod 42 and is suspended within the working chamber 10 of the valve body. The upper working end of the connecting rod 42 extends out of the working chamber 10 of the valve body and is connected to the sensing assembly within the valve cover 2.

[0033] The pressure sensing assembly includes a diaphragm 51 and a diaphragm plate 52. The diaphragm 51 and the diaphragm plate 52 are coaxially arranged. The circumferential direction of the diaphragm 51 is provided with a folding structure. The folding structure is connected to the valve body 1 by being clamped within the groove structure of the second mounting position 15. The diaphragm plate 52 is arranged on the upper working surface of the diaphragm 51. A connecting seat 53 is arranged on the lower working surface of the diaphragm 51. Through holes are provided in the middle of the diaphragm 51, the diaphragm plate 52, and the connecting seat 53. A bolt 54 is inserted through the through holes to realize the connection of the connecting seat 53, the diaphragm plate 52, and the diaphragm 51. A connecting structure is arranged at the lower end of the connecting seat 53 for connecting with the connecting rod 42.

[0034] The valve cover 2 is connected to the valve body 1 through the first mounting position 14 to form a pressure-bearing cavity 21. The first mounting position 14 is a concave structure. Such a design allows the valve cover 2 to be embedded in this concave structure and then fixed by bolts, which can better fix the diaphragm, improve the sealing performance of the product, and enhance the use safety.

[0035] The pressure-bearing assembly is arranged within the pressure-bearing cavity 21 and includes a pressure-bearing spring 61, an adjusting screw 62, and a pressure-regulating cover 63. The lower working end of the pressure-bearing spring 61 abuts against the upper working surface of the diaphragm plate 52. The upper working end of the pressure-bearing spring 61 is clamped within the installation groove of the adjusting screw 62. The adjusting screw 62 is connected to the valve cover. The pressure-regulating cover 63 covers the upper opening of the valve cover 2 and is located above the adjusting screw 62.

[0036] In the ventilation state, under the action of the air flow pressure, the pressure regulating assembly is forced to move upward, causing the diaphragm plate 52 of the pressure sensing assembly to continue to move in the direction of the pressure-bearing spring 61. The pressure-bearing spring 61 in the pressure-bearing assembly is compressed by the force and remains balanced within the set pressure range.

[0037] This application adjusts the gas flow rate and pressure by regulating the gap between the valve plug and the valve core. The structure is relatively simple, the traditional lever is eliminated, the force transmission of the entire structure is more efficient, and the sensitivity and accuracy of the pressure regulator are improved.

[0038] This product can be compatible with various connection requirements during the installation of natural gas pipelines. It can be installed in both horizontal and vertical directions, reducing the use of additional connectors, lowering the installation cost. Moreover, reducing the use of connectors also means reducing the connection points, thereby reducing the risk of gas leakage in pipeline connections, improving the safety of the entire pipeline, and having good market prospects.

[0039] Those skilled in the art should understand that the embodiments of the present utility model described above and shown in the accompanying drawings are only examples and do not limit the present utility model. The objectives of the present utility model have been fully and effectively achieved. The functions and structural principles of the present utility model have been demonstrated and explained in the embodiments. Without departing from the above principles, any deformation or modification can be made to the embodiments of the present utility model.

Claims

1. A three-way natural gas pre-meter pressure regulator, comprising a valve body (1) and a valve cover (2) arranged on the top of the valve body (1), wherein the valve body (1) is provided with an inlet port (11) and an outlet port (12) which are interconnected, and characterized in that: The valve body is also provided with a third open port (13), the third open port (13) being connected to the air inlet port (11) and the air outlet port (12) at the same time, and a pressure regulating component is provided in the valve body working chamber (10) between the air inlet port (11), the air outlet port (12) and the third open port (13), and cooperates with a pressure sensing component and a pressure bearing component provided in the valve cover (2) to achieve pressure regulation.

2. The three-way natural gas pre-meter pressure regulator according to claim 1 is characterized in that: The third open port (13) is arranged at the lower end of the valve body (1) perpendicular to the axis of the air inlet port (11) and the air outlet port (12).

3. The three-way natural gas pre-meter pressure regulator according to claim 2 is characterized in that: A plug (3) is provided at the entrance of the third open port (13).

4. The three-way natural gas pre-meter pressure regulator according to claim 3 is characterized in that: The setting size of the plug (3) is consistent with the size of the entrance of the air inlet port (11).

5. The three-way natural gas pre-meter pressure regulator according to claim 1, characterized in that: The valve body (1) is provided with a plurality of mounting portions, including a first mounting position (14) and a second mounting position (15) located at the top opening of the valve body (1), and a third mounting position (16) located in the working chamber (10) of the valve body, wherein the working surface of the first mounting position (14) is lower than the horizontal plane where the eaves of the valve body (1) is located.

6. The three-way natural gas pre-meter pressure regulator according to claim 5, characterized in that: The pressure regulating assembly comprises a valve core (41), a connecting rod (42) and a valve plug (43); the valve core (41) is installed via the third installation position (16); the connecting rod (42) is vertically movably arranged in the valve core (41); the valve plug (43) is connected to the lower working end of the connecting rod (42) and is suspended in the working chamber (10) of the valve body; the upper working end of the connecting rod (42) extends out from the working chamber (10) of the valve body and is connected to the sensing assembly in the valve cover (2).

7. The three-way natural gas pre-meter pressure regulator according to claim 6, characterized in that: The pressure sensing component comprises a diaphragm (51) and a diaphragm plate (52); the diaphragm (51) is connected to the valve body (1) via the second mounting position (15); the diaphragm plate (52) is arranged on the upper working surface of the diaphragm (51); a connecting seat (53) is arranged on the lower working surface of the diaphragm (51); the connecting seat (53) and the diaphragm plate (52) are connected to the diaphragm (51) via bolts (54); and the lower end of the connecting seat (53) is connected to the connecting rod (42).

8. The three-way natural gas pre-meter pressure regulator according to claim 7, characterized in that: The diaphragm (51) and the diaphragm plate (52) are coaxially arranged.

9. The three-way natural gas pre-meter pressure regulator according to claim 7, characterized in that: The valve cover (2) is connected to the valve body (1) via the first mounting position (14) to form a pressure-bearing chamber (21).

10. The three-way natural gas pre-meter pressure regulator according to claim 9, characterized in that: The pressure-bearing component is arranged in the pressure-bearing chamber (21), and includes a pressure-bearing spring (61), an adjusting screw (62) and a pressure-adjusting cover (63). The lower working end of the pressure-bearing spring (61) abuts against the upper working surface of the diaphragm (52), and the upper working end of the pressure-bearing spring (61) is clamped in the mounting groove of the adjusting screw (62). The adjusting screw (62) is connected to the valve cover. The pressure-adjusting cover (63) is covered on the upper end opening of the valve cover (2) and is located above the adjusting screw (62).

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