Leakage-proof pressure gauge

Abstract

The utility model discloses a leakproof pressure gauge, which relates to the field of pressure gauges and comprises a liquid inlet pipe, a gauge head mounted at the upper end of the liquid inlet pipe, a mounting pipe fixed on a pipeline of a pressure gauge to be mounted, a lower end of the liquid inlet pipe inserted into the mounting pipe, an upper abutting ring fixedly sleeved on the outer side of the middle of the liquid inlet pipe, and a lower abutting ring fixed on the upper abutting ring. A lower abutting ring is fixed to the top face of the mounting pipe. A plurality of side connecting plates are arranged, a threaded sleeve is used for driving the side connecting plates to ascend, an upper abutting ring and a lower abutting ring are oppositely pulled, and the opposite-pulling mode of flange plate connection is essentially started, so that pressure is evenly applied to a sealing gasket for sealing, the damage probability of the sealing gasket is reduced, and the leakage probability of the sealing gasket is reduced; and the bolt does not need to be repeatedly rotated, and only the threaded sleeve needs to be rotated, so that the operation steps of disassembling and assembling the pressure gauge are greatly reduced, the disassembling and assembling efficiency is improved, and maintenance, replacement and replacement of the pressure gauge are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of pressure gauges, and more particularly to a leak-proof pressure gauge. Background Technology

[0002] There are two ways to connect the pressure gauge to the pipeline. One way is to directly open an external thread on the outside of the pressure gauge's inlet pipe, fix a threaded sleeve on the pipeline, and complete the connection by screwing the pressure gauge's inlet pipe into the threaded sleeve. Opposite pressure plates are set on the threaded sleeve and the inlet pipe respectively, and a sealing gasket is installed between the pressure plates to achieve a leak-proof effect.

[0003] Another method is to fix flanges at both the end of the inlet pipe and the installation port of the pipeline, connect the two flanges with multiple bolts, and install sealing gaskets between the flanges to achieve a leak-proof effect.

[0004] Both methods achieve a sealing effect by setting a sealing gasket on the pressure surface. However, the flange connection method requires turning multiple bolts to complete the disassembly and assembly of the instrument, which is not conducive to installation and maintenance. The threaded connection, on the other hand, will bring shear force to the sealing ring due to its rotation, and the local high pressure concentration can easily damage the sealing ring. Both methods have certain drawbacks. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a leak-proof pressure gauge that solves the problems of inconvenient disassembly and assembly caused by flange connection in existing technologies, as well as the problem that threaded connections can easily cause shear force to the sealing ring, leading to damage to the sealing ring.

[0006] To address the problems in the existing technology, the technical solution of this utility model is as follows:

[0007] A leak-proof pressure gauge includes an inlet pipe, a gauge head installed at the upper end of the inlet pipe, and an installation pipe fixed to the pipeline on which the pressure gauge is to be installed. The lower end of the inlet pipe is inserted into the installation pipe. An upper clamping ring is fitted and fixed on the outer side of the middle part of the inlet pipe. A lower clamping ring is fixed on the top surface of the installation pipe. Each longitudinal side of the upper clamping ring is provided with a side connecting plate. The bottom of the side connecting plate extends inward to form a protruding edge.

[0008] The upper end of the outer wall of the liquid inlet pipe is provided with a lifting structure. Each side connecting plate is slidably connected to the lifting structure, and an elastic element is provided between the lifting structure and the side connecting plate. The elastic element makes the side connecting plate tend to move closer to the axis of the installation pipe.

[0009] Optionally, the bottom surface of the side connecting plate is formed with an inclined surface, which is inclined upward from the outside of the side connecting plate to the inside of the side connecting plate.

[0010] Optionally, the lifting structure includes an external thread on the outer wall of the upper end of the liquid inlet pipe, and a threaded sleeve is threadedly connected to the upper end of the liquid inlet pipe through the external thread. The outer wall of the threaded sleeve has a number of anti-slip ridges at equal angular intervals. A connecting ring is rotatably connected to the bottom of the threaded sleeve, and the side connecting plate is slidably connected to the connecting ring.

[0011] Optionally, a sliding rod is symmetrically fixed on the side of the side connecting plate near the connecting ring. The sliding rod is slidably connected to the outer peripheral side wall of the connecting ring through a sliding hole. The elastic element includes a spring sleeved on the outside of the sliding rod, with the two ends of the spring fixed to the outer wall of the connecting ring and the outer wall of the side connecting plate, respectively.

[0012] Optionally, a side groove is provided on each side of the upper retaining ring in the circumferential direction and on each side of the lower retaining ring in the circumferential direction, and the side grooves on the upper retaining ring and the lower retaining ring are positioned correspondingly, with the side connecting plate placed in the two opposite side grooves on the upper and lower retaining rings.

[0013] Compared with the prior art, the advantages of this utility model are as follows:

[0014] This invention uses multiple side connecting plates, which are driven to rise by threaded sleeves, thus pulling the upper and lower retaining rings together. Essentially, this is the same pull-out method used in flange connections. Therefore, it applies pressure evenly to the sealing gaskets, reducing the probability of gasket breakage and leakage. Compared to flange connections, it eliminates the need for repeated bolt rotation; only the threaded sleeve needs to be rotated. This significantly reduces the steps required to assemble and disassemble the pressure gauge, improving efficiency and facilitating maintenance and replacement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the connecting ring structure of this utility model.

[0017] Reference numerals in the attached diagram: 1. Inlet pipe; 2. Gauge head; 3. Mounting pipe; 4. Upper clamping ring; 5. Lower clamping ring; 6. Side connecting plate; 7. Raised edge; 8. Bevel; 9. Side groove; 10. External thread; 11. Threaded sleeve; 12. Anti-slip ridge; 13. Slide rod; 14. Spring; 15. Connecting ring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Please see Figure 1 and Figure 2 This embodiment provides a leak-proof pressure gauge, including an inlet pipe 1, a gauge head 2 installed at the upper end of the inlet pipe 1, an installation pipe 3 fixed on the pipeline where the pressure gauge is to be installed, the lower end of the inlet pipe 1 inserted into the installation pipe 3, an upper clamping ring 4 fixedly sleeved on the outer side of the middle part of the inlet pipe 1, a lower clamping ring 5 fixed on the top surface of the installation pipe 3, and a sealing gasket fixed on the bottom surface of the upper clamping ring 4. When installing the pressure gauge, after the inlet pipe 1 is inserted into the installation pipe 3, the upper clamping ring 4 abuts against the lower clamping ring 5, pressing the sealing gasket and sealing the pipeline connection position.

[0020] Both the upper clamping ring 4 and the lower clamping ring 5 are regular polygons. Each longitudinal side of the upper clamping ring 4 is provided with a side connecting plate 6. The bottom of the side connecting plate 6 extends inward to form a protruding edge 7. The bottom surface of the side connecting plate 6 forms an inclined surface 8. The inclined surface 8 is inclined upward from the outside of the side connecting plate 6 to the inside of the side connecting plate 6. Each side of the upper clamping ring 4 and each side of the lower clamping ring 5 in the circumferential direction are provided with a side groove 9. The side grooves 9 on the upper clamping ring 4 and the side grooves 9 on the lower clamping ring 5 are corresponding. The side connecting plate 6 is placed in the two side grooves 9 that are directly opposite on the upper clamping ring 4 and the lower clamping ring 5. After the liquid inlet pipe 1 is inserted into the installation pipe 3, it is ensured that each side of the upper clamping ring 4 and the lower clamping ring 5 are directly opposite. In this way, it can be ensured that each side connecting plate 6 can be inserted into one side groove 9 on the side of the lower clamping ring 5.

[0021] An external thread 10 is provided on the outer wall of the upper end of the liquid inlet pipe 1. The upper end of the liquid inlet pipe 1 is threadedly connected to a threaded sleeve 11 through the external thread 10. The outer wall of the threaded sleeve 11 has several anti-slip ridges 12 at equal angles. The bottom of the threaded sleeve 11 is rotatably connected to a connecting ring 15 through a bearing. A sliding rod 13 is symmetrically fixed on the side of the side connecting plate 6 near the connecting ring 15. The sliding rod 13 is slidably connected to the outer peripheral side wall of the connecting ring 15 through a sliding hole. A spring 14 is sleeved on the outside of the sliding rod 13. The two ends of the spring 14 are fixed to the outer wall of the connecting ring 15 and the outer wall of the side connecting plate 6, respectively.

[0022] During the insertion of the side connecting plate 6 into a side groove 9 on the lower retaining ring 5, the inclined surface 8 of the bottom of the side connecting plate 6 abuts against the upper edge of the side groove 9 on the lower retaining ring 5, thereby forcing the side connecting plate 6 to slide outward, stretching the spring 14 until the protruding edge 7 at the bottom of the side connecting plate 6 passes over the lower retaining ring 5. Then, the rebound force of the spring 14 pulls the side connecting plate 6 to fit against the inner wall of the side groove 9, and all the protruding edges 7 are locked at the bottom of the lower retaining ring 5. Then, the threaded sleeve 11 is rotated. 11 rises along the outer wall of the inlet pipe 1, pulling the slide rod 13 to drive the side connecting plate 6 to rise, while the raised edge 7 abuts against the bottom surface of the lower clamping ring 5, thereby pulling the upper clamping ring 4 to clamp the lower clamping ring 5, completing the installation work. This connection method retains the advantages of the flange connection method in uniformly applying pressure to the sealing gasket, and also retains the advantages of the threaded connection method in terms of convenient operation, avoiding damage to the sealing gasket, thereby improving the sealing effect, reducing the probability of leakage, and making the pressure change maintenance and replacement operation more convenient.

[0023] 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 leak-proof pressure gauge, characterized in that, Includes an inlet pipe (1), an instrument head (2) installed at the upper end of the inlet pipe (1), and an installation pipe (3) fixed on the pipeline to which the pressure gauge is to be installed. The lower end of the inlet pipe (1) is inserted into the installation pipe (3). An upper clamping ring (4) is fixedly fitted on the outer side of the middle part of the inlet pipe (1). A lower clamping ring (5) is fixed on the top surface of the installation pipe (3). Each longitudinal side of the upper clamping ring (4) is provided with a side connecting plate (6). The bottom of the side connecting plate (6) extends inward to form a protruding edge (7). The upper end of the outer wall of the liquid inlet pipe (1) is provided with a lifting structure. Each side connecting plate (6) is slidably connected to the lifting structure, and an elastic element is provided between the lifting structure and the side connecting plate (6). The elastic element makes the side connecting plate (6) tend to move closer to the axis of the mounting pipe (3).

2. The leak-proof pressure gauge according to claim 1, characterized in that, The bottom surface of the side connecting plate (6) is formed with an inclined surface (8), which is inclined upward from the outside of the side connecting plate (6) to the inside of the side connecting plate (6).

3. The leak-proof pressure gauge according to claim 2, characterized in that, The lifting structure includes an external thread (10) on the outer wall of the upper end of the liquid inlet pipe (1), and a threaded sleeve (11) is threadedly connected to the upper end of the liquid inlet pipe (1) through the external thread (10). A connecting ring (15) is rotatably connected to the bottom of the threaded sleeve (11), and the side connecting plate (6) is slidably connected to the connecting ring (15).

4. The leak-proof pressure gauge according to claim 3, characterized in that, The side plate (6) is symmetrically fixed with a slide rod (13) on the side near the connecting ring (15). The slide rod (13) is slidably connected to the outer peripheral side wall of the connecting ring (15) through a sliding hole.

5. The leak-proof pressure gauge according to claim 4, characterized in that, The elastic element includes a spring (14) sleeved on the outside of the slide bar (13), with the two ends of the spring (14) fixed to the outer wall of the connecting ring (15) and the outer wall of the side connecting plate (6), respectively.

6. The leak-proof pressure gauge according to claim 1, characterized in that, Side grooves (9) are provided on each side of the upper clamping ring (4) and each side of the lower clamping ring (5) in the circumferential direction. The side grooves (9) on the upper clamping ring (4) and the side grooves (9) on the lower clamping ring (5) are in corresponding positions. The side connecting plate (6) is placed in the two side grooves (9) that are directly opposite each other on the upper clamping ring (4) and the lower clamping ring (5).

7. The leak-proof pressure gauge according to claim 3, characterized in that, The outer wall of the threaded sleeve (11) has several anti-slip ridges (12) spaced at equal angles.

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