Air tightness testing device for pressure gauge

Abstract

The utility model discloses a pressure gauge airtightness testing device, which relates to the technical field of pressure gauge airtightness testing and comprises a first half lantern ring and a second half lantern ring, the first half lantern ring and the second half lantern ring are combined into an annular structure, and observation windows are mounted in the first half lantern ring and the second half lantern ring. The clamping strip is clamped in the first half lantern ring and the second half lantern ring, the liquid injection cylinder is fixedly connected to the outer side wall of the first half lantern ring, liquid is injected into the frame-shaped structure through the liquid injection cylinder, and the liquid located in the frame-shaped structure surrounds the connecting position of the pressure gauge and the equipment pipeline. When the joint of the pressure gauge and the equipment pipeline is poor in sealing, bubbles can be generated in the liquid surrounding the joint, so that the airtightness problem of the pressure gauge can be found in time, and the problems that most of existing pressure gauge airtightness testing methods cannot monitor the airtightness of the pressure gauge in real time, and the testing efficiency is low are solved. And when the connection part of the pressure gauge and the equipment is poor in sealing, timely display cannot be carried out.

Description

Technical Field

[0001] This utility model relates to the field of pressure gauge airtightness testing technology, specifically a pressure gauge airtightness testing device. Background Technology

[0002] A pressure gauge is an instrument used to measure the pressure of gases or liquids, widely used in industrial equipment, automobiles, HVAC systems, chemical and water treatment industries. It senses pressure using different principles (such as Bourdon tubes, diaphragms, and sensors) and displays the pressure value on a dial or digital display. Common types of pressure gauges include mechanical pressure gauges (such as Bourdon tube pressure gauges and diaphragm pressure gauges) and electronic pressure gauges (such as digital pressure gauges and smart pressure gauges). Mechanical pressure gauges indicate pressure through the deformation of a metal Bourdon tube, while electronic pressure gauges use sensors to convert the pressure signal into a digital display. The application of pressure gauges helps to monitor equipment pressure in real time, preventing equipment damage caused by excessively high or low pressure, and is an important tool for ensuring production safety and stable equipment operation.

[0003] Pressure gauges are connected to the equipment's piping. However, poor airtightness at the connection point can easily lead to inaccurate pressure readings, uncontrolled system pressure, and internal media leakage. Therefore, pressure gauge airtightness testing is crucial. Existing methods for testing pressure gauge airtightness include the pressure method (increasing equipment pressure and monitoring for pressure drop), the foam method (applying foam liquid to the connection between the pressure gauge and the piping and observing for foam formation), and the gas detection method (using instruments to detect the presence of internal gas near the connection point).

[0004] However, most existing pressure gauge air tightness testing methods cannot monitor the air tightness of the pressure gauge in real time. When a poor seal occurs at the connection between the pressure gauge and the equipment, it cannot be displayed in time. To solve the above-mentioned problems, a pressure gauge air tightness testing device is provided. Utility Model Content

[0005] The purpose of this invention is to provide a pressure gauge airtightness testing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pressure gauge airtightness testing device, comprising a first half-ring and a second half-ring;

[0007] The first half-ring and the second half-ring are combined into a ring structure. The ring structure is used to fit over the connection between the pressure gauge and the equipment pipeline. Both the first half-ring and the second half-ring are frame-type structures, and transparent observation windows are fixedly installed inside the frames of the first half-ring and the second half-ring.

[0008] The clamping strips are configured with four clamping strips, which respectively engage with the inner ends of the first half ring and the second half ring. The clamping strips are used to fill the gap between the pressure gauge and the connection of the equipment pipeline and the ring structure.

[0009] The injection cylinder is fixedly connected to the outer wall of the first half-ring and is used to inject liquid into the frame structure.

[0010] As a preferred embodiment of this utility model, the sides of the first half-ring, the second half-ring, and the locking strip are all fixedly connected with sealing strips.

[0011] As a preferred technical solution of this utility model, the observation window is made of transparent tempered glass.

[0012] As a preferred technical solution of this utility model, the second half ring is provided with an exhaust hole, and an observation tube is rotatably connected to the exhaust hole on the outer side wall of the second half ring.

[0013] As a preferred embodiment of this utility model, the first half ring and one side of the second half ring are rotatably connected by a hinge.

[0014] As a preferred technical solution of this utility model, a slide bar is fixedly connected to the side of the first half ring and the second half ring away from the hinge, and a sliding buckle is slidably engaged on the outer wall of the slide bar.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention involves injecting liquid into a frame structure via an injection cylinder. The liquid within the frame structure surrounds the connection between the pressure gauge and the equipment pipeline. When a poor seal occurs at the connection between the pressure gauge and the equipment pipeline, air bubbles will form inside the liquid surrounding the connection, thus promptly detecting airtightness issues with the pressure gauge. This solves the problem that most existing pressure gauge airtightness testing methods cannot monitor the airtightness of the pressure gauge in real time and cannot promptly display when a poor seal occurs at the connection between the pressure gauge and the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the testing device according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the unfolded structure of the first and second half rings according to an embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional view of the injection cylinder according to an embodiment of the present utility model;

[0020] Figure 4 This is an exploded view of the first and second half-rings of this utility model embodiment;

[0021] Figure 5 This is a schematic diagram of the connection structure of two sliders in an embodiment of the present invention.

[0022] In the diagram: 1. First half ring; 2. Second half ring; 3. Observation window; 4. Locking strip; 5. Injection cylinder; 6. Observation tube; 7. Sliding strip; 71. Sliding buckle. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This embodiment provides a pressure gauge airtightness testing device, including a first half ring 1 and a second half ring 2, wherein the first half ring 1 and the second half ring 2 are both set as arc-shaped frame structures, and the first half ring 1 and the second half ring 2 can be combined into a ring structure after being spliced ​​together.

[0025] like Figure 1 and Figure 2 As shown, the first half-ring 1 and the second half-ring 2 are rotatably connected on one side, preferably by a hinge. The other side of the first half-ring 1 and the second half-ring 2 is provided with a connecting structure, specifically, the connecting structure includes two slide bars 7 and two sliding buckles 71, as shown... Figure 4 As shown, the two sliders 7 are fixedly connected to the side of the first half-ring 1 and the second half-ring 2 away from the hinge, respectively. After the first half-ring 1 and the second half-ring 2 are combined into a ring structure, the two sliders 7 are combined into a strip rail.

[0026] like Figure 5 As shown, the sliding buckle 71 is slidably engaged with the slide bar 7. After the first half ring 1 and the second half ring 2 are spliced, the two sliding buckles 71 are slid to the contact section of the two slide bars 7, which can prevent the two slide bars 7 from separating, thereby preventing the first half ring 1 and the second half ring 2 from rotating and separating.

[0027] An observation window 3 is fixedly installed inside the frame of the first half-ring 1 and the second half-ring 2. The observation window 3 is a curved transparent tempered glass plate. Figure 1 As shown, after the first half-ring 1 and the second half-ring 2 are spliced ​​together, the first half-ring 1, the second half-ring 2 and the observation window 3 can be combined into a cylindrical structure.

[0028] The first half-ring 1 and the second half-ring 2 each have two locking strips 4 inside, such as... Figure 2 As shown, four locking strips 4 are respectively engaged at the inner ends of the first half-ring 1 and the second half-ring 2. In use, a suitable size locking strip 4 is selected based on the outer diameter of the connection between the pressure gauge and the equipment pipeline. The locking strip 4 fills the gap between the connection between the pressure gauge and the equipment pipeline and the annular structure. Furthermore, when the cylindrical structure composed of the first half-ring 1, the second half-ring 2, and the observation window 3 is fitted onto the connection between the pressure gauge and the equipment pipeline, the locking strip 4 secures the cylindrical structure. To increase the sealing of the testing device, adhesive strips are fixedly connected to the sides of the first half-ring 1, the second half-ring 2, and the locking strips 4. These adhesive strips are used to fill the gaps between the first half-ring 1, the second half-ring 2, the locking strips 4, and the connection between the pressure gauge and the equipment pipeline.

[0029] like Figure 1 and Figure 2 As shown, an injection cylinder 5 is fixedly connected to the outer wall of the first half-ring 1, and an vent hole is provided on the outer wall of the second half-ring 2. Figure 3 As shown, the injection cylinder 5 is modeled after a medical syringe. It is filled with liquid, which can be water. When the cylindrical structure consisting of the first half-ring 1, the second half-ring 2, the observation window 3, and the retaining strip 4 is fixedly fitted at the connection between the pressure gauge and the equipment pipeline, it pushes the piston of the injection cylinder 5, delivering the liquid inside to the interior of the first half-ring 1 and the second half-ring 2. The observation window 3 allows observation of whether the liquid inside the first half-ring 1 and the second half-ring 2 has submerged the connection between the pressure gauge and the equipment pipeline. Gas inside the first half-ring 1 and the second half-ring 2 can be discharged through the vent during liquid injection. When the liquid submerges the connection between the pressure gauge and the equipment pipeline, if there is a poor seal at the connection, the liquid will churn and generate bubbles, regardless of whether the pressure environment is positive or negative. The presence of bubbles in the liquid through the observation window 3 indicates a real-time leak at the connection between the pressure gauge and the equipment pipeline.

[0030] After the piston of the injection cylinder 5 is pushed, the liquid enters the first half-ring 1 and the second half-ring 2, and easily flows out from the vent hole. To prevent the liquid from flowing out from the vent hole and to observe the liquid injection status, an observation tube 6 is rotatably connected to the vent hole on the outer wall of the second half-ring 2. Figure 1 and Figure 2 As shown, the observation tube 6 is an arc-shaped tube. Before injecting liquid, the end of the observation tube 6 furthest from the second half-ring 2 must be rotated upwards. The observation tube 6 is made of transparent tempered glass. When injecting liquid, if liquid enters the observation tube 6, the injection can be stopped, and the installation is complete.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure gauge airtightness testing device, characterized in that, include: The first half ring (1) and the second half ring (2); The first half-ring (1) and the second half-ring (2) are combined into a ring structure. The ring structure is used to fit into the connection between the pressure gauge and the equipment pipeline. The first half-ring (1) and the second half-ring (2) are both set as frame structures, and a transparent observation window (3) is fixedly installed inside the frame of the first half-ring (1) and the second half-ring (2). The four clips (4) are respectively engaged with the inner ends of the first half ring (1) and the second half ring (2). The clips (4) are used to fill the gap between the pressure gauge and the connection of the equipment pipeline and the ring structure. The injection cylinder (5) is fixedly connected to the outer wall of the first half-ring (1) and is used to inject liquid into the frame structure.

2. The pressure gauge airtightness testing device according to claim 1, characterized in that: The sides of the first half-ring (1), the second half-ring (2), and the locking strip (4) are all fixedly connected with rubber strips for sealing.

3. The pressure gauge airtightness testing device according to claim 1, characterized in that: The observation window (3) is made of transparent tempered glass.

4. The pressure gauge airtightness testing device according to claim 2, characterized in that: The second half ring (2) has an exhaust hole, and an observation tube (6) is rotatably connected to the exhaust hole on the outer side wall of the second half ring (2).

5. The pressure gauge airtightness testing device according to claim 4, characterized in that: The first half-ring (1) and the second half-ring (2) are rotatably connected by a hinge on one side.

6. The pressure gauge airtightness testing device according to claim 5, characterized in that: The first half-ring (1) and the second half-ring (2) are fixedly connected to a slide bar (7) on the side away from the hinge, and the outer side wall of the slide bar (7) is slidably engaged with a slide buckle (71).

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