Special pressure measuring tool for gas pressure regulator

Abstract

The utility model discloses a special pressure measuring tool for a gas pressure regulator, which abandons a complex connection mode of a traditional pressure measuring device, adopts a unique modular design concept, takes two pressure-resistant hoses with good flexibility and strong pressure resistance as a basic connection channel, ensures stable transmission of gas among all parts, and is convenient to use. The C-type quick connection female head and the C-type quick connection male head are used in cooperation, the quick connection structure is based on precise machining and ingenious structural design, quick disassembly and assembly of the pressure gauge can be achieved under the condition that no auxiliary tool is used, compared with a traditional pressure gauge connection mode, the operation time is greatly shortened, and the operation efficiency is improved. Original minutes are shortened to seconds, the efficiency of maintenance work is greatly improved, and the high-precision needle valve, the miniature overpressure relief valve and the two-needle valve can achieve accurate pressure protection on a measuring tool and a pressure gauge.

Description

Technical Field

[0001] The utility model relates to the technical field of gas pressure regulation, especially to the technical field of special tools for measuring the pressure of gas pressure regulators. Background Art

[0002] The gas pressure regulator, commonly known as the pressure reducing valve and also called the gas pressure regulating valve, is a device that automatically changes the gas flow through the regulating valve to keep the outlet gas at a specified pressure. It is usually divided into two types: direct-acting type and indirect-acting type. With the promotion of the global "dual carbon" goal, the low-carbon transformation in the energy field has accelerated, and the pace of energy structure adjustment in large factories such as the original thermal power, industrial manufacturing, boilers, and pharmaceuticals has been continuously accelerating. In this process of change, the diverse development of energy equipment has led to significant differences in the performance and thermal efficiency of different industrial and commercial combustion appliances, and further made the natural gas pressure range and flow demand show a complex changing trend. The measurement range and accuracy of the pressure gauges required by different pressure regulating devices vary depending on the working conditions. However, currently in the maintenance process, many problems have emerged in the pressure gauge measurement link, such as the waste of working hours caused by frequent disassembly and replacement of the gauge, the easy damage of the pressure gauge caused by gas fluctuations, and the increased wear of the sealing parts. These problems not only increase the maintenance cost but also have an adverse impact on the efficiency and quality of the pressure regulating maintenance work. Summary of the Invention

[0003] The purpose of the utility model is to solve the problems in the prior art, and propose a special tool for measuring the pressure of a gas pressure regulator, which is convenient for quickly replacing the pressure gauge and can better protect the tool and the pressure gauge from pressure.

[0004] To achieve the above purpose, the utility model proposes a special tool for measuring the pressure of a gas pressure regulator, which includes several pressure gauges, and also includes a first three-way connector and a second three-way piece connected to one end of the first three-way connector. The first three-way connector is provided with a first pressure-resistant hose and a second pressure-resistant hose connected to it. The other end of the second pressure-resistant hose is provided with a charging and discharging air bag. The second three-way piece is provided with a multi-way valve seat and a micro overpressure relief valve connected to it. The multi-way valve seat is provided with several C-type quick-connect female heads, and the pressure gauges are provided with C-type quick-connect male heads for plugging and mating with the C-type quick-connect female heads. A second needle valve is also provided at the input end of the pressure gauge.

[0005] Preferably, the first three-way connector is a quarter-inch pagoda three-way.

[0006] Preferably, the second three-way piece is a half-inch three-way.

[0007] Preferably, a high-precision needle valve is provided on the charging and discharging air bag and is connected to it.

[0008] Preferably, an air filtering mechanism is provided between the charging and discharging air bag and the second pressure-resistant hose.

[0009] Preferably, the air filtration mechanism includes a filter housing with a through chamber inside. The inflation / deflation bladder communicates with one end of the chamber. The end of the second pressure-resistant hose is provided with a sliding sealing ring, which is axially slidable within the chamber. A side opening communicating with the chamber is provided on the side wall of the filter housing. A fixed sealing ring is provided at the side opening opposite to the sliding sealing ring. A filter element is detachably provided between the sliding sealing ring and the fixed sealing ring, and the filter element can pass through the side opening. The air filtration mechanism also includes a locking member for driving the sliding sealing ring to move towards the fixed sealing ring.

[0010] Preferably, the locking member includes a first lever arm and a second lever arm. One end of the first lever arm is hinged to the outer wall of the filter mechanism housing, and one end of the second lever arm is hinged to the outer wall of the sliding sealing ring through the side opening, and the other end is hinged to the middle of the second lever arm.

[0011] Preferably, the side opening is a strip-shaped groove extending axially along the filter mechanism housing, and at least two side openings are provided on the filter mechanism housing. The sliding sealing ring is provided with a plurality of directional blocks adapted to the side openings, and the directional blocks are slidably disposed on the side openings.

[0012] The beneficial effects of this utility model's special pressure testing tool for gas pressure regulators are as follows: This utility model abandons the complex connection mode of traditional pressure testing devices and adopts a unique modular design concept. It uses two flexible and pressure-resistant hoses as the basic connection channels to ensure stable gas transmission between components. The use of C-type quick-connect female and C-type quick-connect male internal threads, this quick connection structure is based on precision machining and ingenious structural design, which can realize the quick disassembly and installation of pressure gauges without the aid of any auxiliary tools. Compared with the traditional pressure gauge connection method, the operation time is greatly shortened from several minutes to several seconds, which greatly improves the efficiency of maintenance work. The high-precision needle valve, miniature overpressure relief valve, and dual needle valve can realize precise pressure protection for measuring tools and pressure gauges.

[0013] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a special tool for measuring the pressure of a gas pressure regulator according to the present invention.

[0015] Figure 2 This is a schematic diagram of the structure of a second embodiment of the gas pressure regulator pressure testing tool of this utility model.

[0016] Figure 3 This is a schematic diagram of the main structure of the air filter mechanism of a gas pressure regulator pressure measuring tool according to this utility model.

[0017] Figure 4 This is a side view of the air filter mechanism of a gas pressure regulator pressure testing tool according to this utility model.

[0018] Figure 5 This is a front view cross-sectional structural diagram of the air filter mechanism of a gas pressure regulator pressure measuring tool according to this utility model.

[0019] Figure 6 This is a schematic diagram of the sliding sealing ring from below.

[0020] Figure 7 This is a schematic diagram of the filter element's structure from below.

[0021] In the diagram: 1-Pressure gauge, 2-First tee connector, 3-Second tee connector, 4-Second pressure-resistant hose, 5-Pressure relief bladder, 6-High-precision needle valve, 7-Multi-port valve seat, 8-Miniature overpressure relief valve, 9-Type C quick-connect female connector, 10-Type C quick-connect male connector, 11-Second needle valve, 12-Air filter mechanism, 13-First pressure-resistant hose, 121-Filter mechanism housing, 122-Sliding sealing ring, 123-Fixed sealing ring, 124-Filter element, 125-First lever arm, 126-Second lever arm, 1211-Side port, 1221-Oriented locking block. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0023] In the description of this utility model, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0024] In the description of this utility model, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0026] See Figure 1This utility model discloses a special tool for measuring the pressure of a gas pressure regulator, comprising several pressure gauges 1 with different measuring ranges, a first three-way connector 2, and a second three-way connector 3 connected to one end of the first three-way connector 2. The first three-way connector 2 is provided with a first pressure-resistant hose 13 and a second pressure-resistant hose 4 connected thereto. The other end of the second pressure-resistant hose 4 is provided with an inflation / deflation bladder 5. The second three-way connector 3 is provided with a multi-way valve seat 7 and a miniature overpressure relief valve 8 connected thereto. The multi-way valve seat 7 is provided with three C-type quick-connect female connectors 9. The pressure gauge 1 is provided with a C-type quick-connect male connector 10 for insertion and mating with the C-type quick-connect female connectors 9. A second needle valve 11 is also provided at the input end of the pressure gauge 1. A high-precision needle valve 6 is provided on the inflation / deflation bladder 5 and connected thereto. First, based on the user's gas equipment parameters and actual operating conditions, open the pressure gauge 1 with the corresponding range. During use, connect the first pressure-resistant hose 13 to the pressure gauge's single-point probe. Preset the maximum protection pressure of the miniature overpressure relief valve 8 according to the pressure gauge 1's range to prevent impact or damage to the pressure gauge 1 caused by pressure fluctuations or malfunctions of the pressure regulator. When the gas to be tested is connected to the system, the miniature overpressure relief valve 8 controls the system pressure in real time. If the pressure exceeds the set threshold, it immediately activates the pressure relief protection. Operators can precisely adjust the protection pressure by rotating the spring cap of the miniature overpressure relief valve 8 based on the pressure changes measured by the pressure gauge 1. The opening of the second needle valve 11 ensures a uniform and stable gas load on the pressure gauge 1. The pressure relief bladder 5 is not merely a simple pressure buffer component but also a core component with pressure regulation capabilities. Through the built-in high-precision needle valve 6, it can control the required test gas pressure. During measurement, operators only need to pressurize the bladder to the set value according to the rated pressure parameters of the equipment being tested to adjust the internal pressure and achieve precise protection pressure setting. When the gas pressure in the system exceeds the set protection threshold, the high-precision needle valve 6 of the bladder opens to release excess pressurized gas, precisely regulating the safe pressure range. After measurement, when it is necessary to switch to pressure gauge 1 with other ranges, quickly open pressure gauge 1 with other ranges and repeat the above operation until the pressure measurement work of the remaining gas supply pressure regulators is completed. When the existing pressure gauge 1 cannot meet the requirements, a suitable pressure gauge 1 can be quickly replaced through C-type quick-connect male connector 10 and C-type quick-connect female connector 9.

[0027] Specifically, the miniature overpressure relief valve 8, the high-precision needle valve 6, and the second needle valve 11 are all existing technologies. The miniature overpressure relief valve 8's valve core is made of a special alloy material, possessing extremely high hardness and wear resistance, enabling it to maintain excellent sealing performance and operational sensitivity under long-term, frequent operation. During operation, if the pressure in the pressure regulating system exceeds the safe range, the miniature overpressure relief valve 8 can quickly open within a short time, precisely controlling the pressure relief rate and amount, thus stabilizing the system pressure within the safe range. Its opening pressure error is controlled within ±5%, and its repeatable opening and closing performance is excellent, effectively ensuring the safe operation of the pressure gauge 1 and the entire pressure measuring tool during maintenance and commissioning.

[0028] The valve core of the second needle valve 11 reduces the impact and turbulence during gas flow. By rotating the control unit of the second needle valve 11, the gas flow rate can be continuously and precisely adjusted. This precise flow control capability ensures a stable gas flow rate for the pressure gauge 1 under different gas supply pressure conditions, guaranteeing the accuracy and stability of the measurement data. Whether for low-flow, small-range measurements or high-flow, large-range detections, the internal and external threads of the second needle valve 11 can quickly adjust to the optimal working state to meet diverse measurement needs.

[0029] Specifically, the first tee connector 2 is a 1 / 2-inch pagoda tee, and the second tee connector 3 is a 1 / 2-inch tee. The application of internal and external threads in the 1 / 2-inch pagoda tee and the 1 / 2-inch tee enables the connection between pipes of different diameters and the rational distribution of gas, making the entire airflow path smoother. Example 2

[0030] See Figure 2 Based on Embodiment 1, to prevent dust and other contaminants from entering the pressure regulator during the pressure adjustment process, an air filter mechanism 12 is provided between the pressure relief bladder 5 and the second pressure-resistant hose 4. This filter can filter the air injected into the pressure relief bladder 5, preventing dust from affecting the normal operation of the tool or gas pressure regulator in this embodiment.

[0031] For details, please refer to Figure 3 , Figure 4 , Figure 5The air filtration mechanism 12 includes a filter housing 121, with a through chamber inside the filter housing 121. The inflation / deflation bladder 5 is connected to one end of the chamber. The end of the second pressure-resistant hose 4 is provided with a sliding sealing ring 122, which is axially slidable within the chamber. A side opening 1211 communicating with the chamber is provided on the side wall of the filter housing 121. A fixed sealing ring 123 is provided at the side opening 1211, which is opposite to the sliding sealing ring 122. A filter element 124 is detachably provided between the sliding sealing ring 122 and the fixed sealing ring 123. The filter element 124 can pass through the side opening 1211. The air filtration mechanism 12 also includes a locking member for driving the sliding sealing ring 122 to move toward the fixed sealing ring 123. In this embodiment, the filter element 124 is placed between the fixed sealing ring 123 and the fixed sealing ring 123, and the filter element 124 is clamped and fixed by the two, which makes the fixing more convenient. A side opening 1211 is provided, through which the filter element 124 can be easily put in and taken out, and the filter element 124 can be easily replaced. When replacing the filter element 124, it is not necessary to completely disassemble the air filtration mechanism 12.

[0032] For details, please refer to Figure 3 , Figure 4 , Figure 5 The locking mechanism includes a first lever arm 125 and a second lever arm 126. One end of the first lever arm 125 is hinged to the outer wall of the filter housing 121. One end of the second lever arm 126 is hinged to the outer wall of the sliding sealing ring 122 through the side opening 1211, and the other end is hinged to the middle of the second lever arm 126. When replacing the filter element 124, the first lever arm 125 is pried open away from the filter housing 121, thereby moving the second lever arm 126 together. The second lever arm 126 moves the sliding sealing ring 122 away from the fixed sealing ring 123, so that the two are separated from the filter element 124. The old filter element 124 can be taken out through the side opening 1211, and then the new filter element 124 can be inserted through the side opening 1211. The first lever arm 125 is then reset, so that the sliding sealing ring 122 resets and cooperates with the fixed sealing ring 123 to clamp the filter element 124.

[0033] Among them, see Figure 4 The side opening 1211 is a strip-shaped slot extending axially along the filter mechanism housing 121, and two side openings 1211 are provided on the filter mechanism housing 121. (See reference) Figure 6 The sliding sealing ring 122 is provided with two directional blocks 1221 that are adapted to the side opening 1211, and the directional blocks 1221 are slidably disposed on the side opening 1211.

[0034] For information on the structure of filter element 124, please refer to [link / reference]. Figure 7The filter element 124 includes an annular structure 1241 on the outer ring and filter material 1242 at the center of the annular structure 1241. The annular structure 1241 is an elastic structure, which facilitates its fit with the sliding sealing ring 122 and the fixed sealing ring 123.

[0035] See Figure 5 Both the sliding sealing ring 122 and the fixed sealing ring 123 are equipped with pagoda-shaped connectors for mating with the flexible hose.

[0036] The working process of this utility model:

[0037] This utility model discloses a special tool for testing gas pressure regulators. During operation, the first pressure-resistant hose 13 is connected to the pressure testing nozzle of the regulator to be tested. The maximum protection pressure of the miniature overpressure relief valve 8 is preset according to the range of the pressure gauge 1 to prevent impact and damage to the pressure gauge 1 caused by pressure fluctuations or malfunctions of the regulator. When the gas to be tested is connected to the system, the miniature overpressure relief valve 8 controls the system pressure in real time. If the pressure exceeds the set threshold, the pressure relief protection is immediately activated. The operator can precisely adjust the protection pressure by rotating the spring cap of the miniature overpressure relief valve 8 according to the pressure changes measured by the pressure gauge 1. The opening of the second needle valve 11 ensures that the gas load on the pressure gauge 1 is uniform and stable. The pressure-relieving bladder 5 is not just a simple pressure buffer component, but also a core component with pressure regulation function. Through the built-in high-precision needle valve 6, it can control the required test gas pressure. During measurement, the operator only needs to pressurize the bladder to the set value according to the rated pressure parameters of the device under test to adjust the internal pressure and achieve precise protection pressure setting. When the gas pressure in the system exceeds the set protection threshold, the high-precision needle valve 6 of the bladder opens to release the excess pressurized gas and precisely regulate the safe pressure range.

[0038] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The internal components of the electric slide rail, cylinder, welding machine, electric telescopic rod and controller all adopt conventional models in the existing technology, and their internal structure belongs to the existing technology structure. Workers can complete the normal operation of them according to the existing technical manual. In addition, the circuit connection adopts the conventional connection method in the existing technology, and will not be described in detail here.

[0039] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this utility model patent.

Claims

1. A special tool for measuring the pressure of a gas pressure regulator, comprising a plurality of pressure gauges (1), characterized in that: It also includes a first three-way connector (2) and a second three-way connector (3) connected to one end of the first three-way connector (2). The first three-way connector (2) is provided with a first pressure-resistant hose (13) and a second pressure-resistant hose (4) connected to it. The other end of the second pressure-resistant hose (4) is provided with a pressure relief bladder (5). The second three-way connector (3) is provided with a multi-way valve seat (7) and a miniature overpressure relief valve (8) connected to it. The multi-way valve seat (7) is provided with several C-type quick-connect female connectors (9). The pressure gauge (1) is provided with a C-type quick-connect male connector (10) for insertion and mating with the C-type quick-connect female connector (9). A second needle valve (11) is also provided at the input end of the pressure gauge (1).

2. The gas pressure regulator pressure testing tool as described in claim 1, characterized in that: The first tee connector (2) is a four-point pagoda tee.

3. The gas pressure regulator pressure testing tool as described in claim 1, characterized in that: The second three-way component (3) is a two-way three-way connector.

4. The gas pressure regulator pressure testing tool as described in claim 1, characterized in that: A high-precision needle valve (6) is provided on the inflation / deflation bladder (5) and communicates with it.

5. The gas pressure regulator pressure testing tool as described in claim 1, characterized in that: An air filter mechanism (12) is provided between the inflation / deflation bladder (5) and the second pressure-resistant hose (4).

6. The gas pressure regulator pressure testing tool as described in claim 5, characterized in that: The air filtration mechanism (12) includes a filter mechanism housing (121), which has a through chamber inside. The pressure relief bladder (5) is connected to one end of the chamber. The end of the second pressure-resistant hose (4) is provided with a sliding sealing ring (122). The sliding sealing ring (122) is axially slidably disposed in the chamber. The side wall of the filter mechanism housing (121) is provided with a side opening (1211) that communicates with the chamber. The side opening (1211) is provided with a fixed sealing ring (123) that is opposite to the sliding sealing ring (122). A filter element (124) is detachably disposed between the sliding sealing ring (122) and the fixed sealing ring (123). The filter element (124) can pass through the side opening (1211). The air filtration mechanism (12) also includes a locking member for driving the sliding sealing ring (122) to move toward the fixed sealing ring (123).

7. The gas pressure regulator pressure testing tool as described in claim 6, characterized in that: The locking component includes a first lever arm (125) and a second lever arm (126). One end of the first lever arm (125) is hinged to the outer wall of the filter housing (121). One end of the second lever arm (126) is hinged to the outer wall of the sliding sealing ring (122) through the side opening (1211), and the other end is hinged to the middle of the second lever arm (126).

8. The gas pressure regulator pressure testing tool as described in claim 7, characterized in that: The side opening (1211) is a strip-shaped slot extending axially along the filter housing (121), and at least two side openings (1211) are provided on the filter housing (121). The sliding sealing ring (122) is provided with a plurality of directional blocks (1221) adapted to the side opening (1211), and the directional blocks (1221) are slidably provided on the side opening (1211).

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