Leakage-proof connecting device for pressure gauge

Abstract

The utility model relates to the technical field of pressure gauges, and discloses a pressure gauge leakproof connecting device which comprises a pressure gauge head, an upper pipe body is fixedly connected to the bottom of the pressure gauge head, a connecting ring is fixedly connected to the bottom of the upper pipe body, a first backing ring is arranged outside the connecting ring, a lower pipe body is arranged on the lower side of the upper pipe body, and a second backing ring is arranged on the lower side of the lower pipe body. And the inner wall of the upper end of the lower pipe body is tightly attached to and matched with the outer wall of the connecting ring, a second backing ring is arranged in the lower pipe body, a limiting ring is fixedly connected to the top of the outer wall of the lower pipe body, and an upper protection ring is fixedly connected to the exterior of the upper pipe body. According to the utility model, the upper protection ring, the lower protection ring, the lifting ring and the protection strips can protect the upper pipe body and the lower pipe body and prevent the upper pipe body and the lower pipe body from being damaged due to external impact, so that the possibility of leakage is reduced, and the upper protection ring, the lower protection ring, the upper pipe body and the lower pipe body are fixed by the lower fixing ring, the upper fixing ring and the bolts, so that the connection strength is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure gauges, in particular to a leakage-proof connecting device for pressure gauges. Background Art

[0002] A pressure gauge is an instrument that uses an elastic element as a sensitive element to measure and indicate pressure higher than the ambient pressure. Since the elastic sensitive element of the pressure gauge has high mechanical strength and is easy to produce, the pressure gauge is widely used in various equipment and in downhole operations, oil production, drilling and other projects to measure pressure.

[0003] Currently, pressure gauges are all installed on pressure gauge joints. Traditional pressure gauges and pipelines are mostly connected by threaded connections, which have poor firmness and stability. The threads are prone to loosening and detachment after long-term use, causing liquid or gas in the pipeline to leak out from the joints. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a pressure gauge anti-leakage connection device to protect the pipeline and increase the strength of the pipeline connection, thereby reducing the possibility of leakage.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pressure gauge anti-leakage connection device comprises a pressure gauge head, the bottom of the pressure gauge head is fixedly connected to an upper tube body, the bottom of the upper tube body is fixedly connected to a connecting ring, a first gasket is arranged on the outside of the connecting ring, a lower tube body is arranged on the lower side of the upper tube body, the upper end inner wall of the lower tube body is tightly matched with the outer wall of the connecting ring, a second gasket is arranged on the inside of the lower tube body, a limiting ring is fixedly connected to the top of the outer wall of the lower tube body, an upper protective ring is fixedly connected to the outside of the upper tube body, a lower protective ring is arranged on the outside of the lower tube body, a fixing groove is opened on the top of the inner wall of the lower protective ring, a lifting ring is threadedly connected to the outer wall of the lower end of the lower protective ring, the outer wall of the upper protective ring and the lifting ring are both fixedly connected with protective strips, and the upper protective ring and the lifting ring are connected by a fixing component.

[0007] Furthermore, the fixing assembly includes a lower fixing ring at the top of the outer wall of the lower protective ring and an upper fixing ring at the bottom of the outer wall of the upper protective ring, a plurality of first through holes are opened on the inner and outer sides of the lower fixing ring, hexagonal grooves are opened on the lower side of the lower fixing ring corresponding to the positions of the first through holes, and a lower sealing groove is opened on the upper side of the lower fixing ring.

[0008] Furthermore, a plurality of second through holes are provided on the inner and outer sides of the upper fixing ring, and an upper sealing groove is provided on the lower side of the upper fixing ring.

[0009] Furthermore, the inner wall of the lower fixing ring is fixedly connected to the top of the outer wall of the lower protective ring.

[0010] Furthermore, the inner wall of the upper fixing ring is fixedly connected to the bottom of the outer wall of the upper protective ring.

[0011] Furthermore, a sealing ring is embedded in the lower sealing groove and the upper sealing groove.

[0012] Furthermore, bolts are passed through the first through hole and the second through hole, and the lower ends of the bolts are tightly matched with the inner walls of the hexagonal grooves.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the utility model, the upper protective ring, the lower protective ring, the lifting ring and the protective strip can protect the upper tube body and the lower tube body to avoid damage caused by external impact, thereby reducing the possibility of leakage.

[0015] 2. In the utility model, the upper and lower protective rings, the upper and lower tube bodies can be fixed by providing a lower fixing ring, an upper fixing ring and bolts, thereby improving the strength of the connection and avoiding the instability of the connection caused by the traditional threaded connection for a long time, resulting in leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an overall schematic diagram of a pressure gauge anti-leakage connection device proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of a second gasket ring of a pressure gauge anti-leakage connection device proposed by the utility model;

[0018] Figure 3 A cross-sectional schematic diagram of a pressure gauge anti-leakage connection device proposed by the utility model;

[0019] Figure 4 A schematic diagram of a sealing ring of a pressure gauge anti-leakage connection device proposed by the utility model;

[0020] Figure 5 A schematic diagram of a lower protective ring of a pressure gauge anti-leakage connection device proposed by the utility model;

[0021] Figure 6 The utility model is a schematic diagram of a fixing groove of a pressure gauge anti-leakage connection device.

[0022] Legend:

[0023] 1. Pressure gauge head; 2. Upper tube body; 3. Connecting ring; 4. First gasket; 5. Lower tube body; 6. Second gasket; 7. Limiting ring; 8. Upper protective ring; 9. Lower protective ring; 10. Fixing groove; 11. Lifting ring; 12. Protective strip; 13. Lower fixing ring; 14. First through hole; 15. Hexagonal groove; 16. Lower sealing groove; 17. Sealing ring; 18. Upper fixing ring; 19. Second through hole; 20. Upper sealing groove; 21. Bolt. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Reference Figure 1-6 The utility model provides an embodiment: a pressure gauge anti-leakage connection device, including a pressure gauge head 1, an upper tube body 2 is fixedly connected to the bottom of the pressure gauge head 1, a connecting ring 3 is fixedly connected to the bottom of the upper tube body 2, a first gasket 4 is arranged on the outside of the connecting ring 3, a lower tube body 5 is arranged on the lower side of the upper tube body 2, the upper end inner wall of the lower tube body 5 is tightly matched with the outer wall of the connecting ring 3, a second gasket 6 is arranged inside the lower tube body 5, a limiting ring 7 is fixedly connected to the top of the outer wall of the lower tube body 5, an upper protective ring 8 is fixedly connected to the outside of the upper tube body 2, a lower protective ring 9 is arranged on the outside of the lower tube body 5, a fixing groove 10 is opened on the top of the inner wall of the lower protective ring 9, a lifting ring 11 is threadedly connected to the outer wall of the lower end of the lower protective ring 9, and the upper protective ring 8 is fixedly connected to the outer wall of the lower tube body 2. The outside of the lifting ring 11 is fixedly connected with a protective strip 12; the second gasket 6 is installed inside the lower tube body 5, the first gasket 4 is put on the outside of the connecting ring 3, and then the connecting ring 3 is inserted into the inside of the lower tube body 5 and then fixed. The first gasket 4 and the second gasket 6 are squeezed by the upper tube body 2, the connecting ring 3, and the lower tube body 5 to improve the sealing performance and avoid leakage. The upper tube body 2 and the lower tube body 5 can be protected by the upper protective ring 8, the lower protective ring 9, the lifting ring 11 and the protective strip 12, so as to absorb the external impact force and reduce the possibility of damage to the upper tube body 2 and the lower tube body 5. The lifting ring 11 can be made to move downward on the outside of the lower protective ring 9 by rotating the lifting ring 11, so as to completely cover the lower tube body 5 inside.

[0026] The top of the outer wall of the lower protective ring 9 is fixedly connected to a lower fixing ring 13, and a plurality of first through holes 14 are provided inside and outside the lower fixing ring 13. A hexagonal groove 15 is provided at the position corresponding to the first through holes 14 on the lower side of the lower fixing ring 13, and a lower sealing groove 16 is provided on the upper side of the lower fixing ring 13. The bottom of the outer wall of the upper protective ring 8 is fixedly connected to an upper fixing ring 18, and a plurality of second through holes 19 are provided inside and outside the upper fixing ring 18. An upper sealing groove 20 is provided on the lower side of the upper fixing ring 18, and the lower sealing groove 16 and the upper sealing groove 20 are embedded together. There is a sealing ring 17, and bolts 21 are passed through the first through hole 14 and the second through hole 19. The lower ends of the bolts 21 are tightly matched with the inner walls of the hexagonal grooves 15 respectively; the lower protective ring 9 and the lifting ring 11 are driven to rise and approach the upper fixing ring 18 through the lower fixing ring 13, and at the same time, the lower fixing ring 13 and the upper fixing ring 18 are fixed close to each other through the bolts 21, and at the same time, the limit ring 7 cooperates with the fixing groove 10, and when the lower fixing ring 13 and the upper fixing ring 18 are close to each other, the upper tube body 2 and the lower tube body 5 are driven to approach each other and be fixed.

[0027] Working principle: install the second gasket 6 inside the lower tube body 5, put the first gasket 4 on the outside of the connecting ring 3, then insert the connecting ring 3 into the lower tube body 5, install the sealing ring 17 inside the lower sealing groove 16, then drive the lower protective ring 9 and the lifting ring 11 to rise through the set lower fixing ring 13, so that the lower fixing ring 13 is close to the upper fixing ring 18, then pass the bolt 21 through the first through hole 14 and the second through hole 19, and fix the lower fixing ring 13 and the upper fixing ring 18 by turning the nut, so that the lower fixing ring 13 is tightly attached to the upper fixing ring 18, and the upper tube body 2 and the lower tube body 5 can be driven to approach and be fixed by cooperating with the set limit ring 7 and the fixing groove 10.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure gauge anti-leakage connection device, comprising a pressure gauge head (1), characterized in that: The bottom of the pressure gauge head (1) is fixedly connected to an upper tube body (2), the bottom of the upper tube body (2) is fixedly connected to a connecting ring (3), a first gasket (4) is arranged outside the connecting ring (3), a lower tube body (5) is arranged on the lower side of the upper tube body (2), the upper inner wall of the lower tube body (5) is tightly matched with the outer wall of the connecting ring (3), a second gasket (6) is arranged inside the lower tube body (5), and a limiting ring is fixedly connected to the top of the outer wall of the lower tube body (5). (7), an upper protective ring (8) is fixedly connected to the outside of the upper tube body (2), a lower protective ring (9) is arranged on the outside of the lower tube body (5), a fixing groove (10) is provided on the top of the inner wall of the lower protective ring (9), a lifting ring (11) is threadedly connected to the outer wall of the lower end of the lower protective ring (9), and a protective strip (12) is fixedly connected to the outside of the upper protective ring (8) and the lifting ring (11), and the upper protective ring (8) and the lifting ring (11) are connected via a fixing assembly.

2. A pressure gauge anti-leakage connection device according to claim 1, characterized in that: The fixing assembly comprises a lower fixing ring (13) at the top of the outer wall of the lower protective ring (9) and an upper fixing ring (18) at the bottom of the outer wall of the upper protective ring (8); a plurality of first through holes (14) are provided on the inner and outer sides of the lower fixing ring (13); hexagonal grooves (15) are provided on the lower side of the lower fixing ring (13) at positions corresponding to the first through holes (14); and a lower sealing groove (16) is provided on the upper side of the lower fixing ring (13).

3. A pressure gauge anti-leakage connection device according to claim 2, characterized in that: A plurality of second through holes (19) are provided on the inner and outer sides of the upper fixing ring (18), and an upper sealing groove (20) is provided on the lower side of the upper fixing ring (18).

4. A pressure gauge anti-leakage connection device according to claim 2, characterized in that: The inner wall of the lower fixing ring (13) is fixedly connected to the top of the outer wall of the lower protective ring (9).

5. A pressure gauge anti-leakage connection device according to claim 2, characterized in that: The inner wall of the upper fixing ring (18) is fixedly connected to the bottom of the outer wall of the upper protective ring (8).

6. A pressure gauge anti-leakage connection device according to claim 2, characterized in that: A sealing ring (17) is embedded in the lower sealing groove (16) and the upper sealing groove (20).

7. A pressure gauge anti-leakage connection device according to claim 2, characterized in that: A bolt (21) is inserted into the first through hole (14) and the second through hole (19), and the lower ends of the bolts (21) are respectively tightly fitted with the inner walls of the hexagonal grooves (15).

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