High-sealing pressure measuring connector

Abstract

The utility model discloses a high-sealing pressure-measuring joint, which relates to the field of pressure-measuring joints, and is characterized in that a sealing gasket ring used for completing sealing between a dustproof cover and a test threaded opening and sealing between a test hose joint and the test threaded opening is arranged into a double structure of an inner ring part and an outer ring part; in a normal state and a test state, different parts of the sealing gasket ring are pressed, the outer ring part is always pressed in the normal state, and the inner ring part is not pressed, so that the inner ring part can have a good sealing effect during test; therefore, the air tightness between the test hose joint and the test threaded port during the test is greatly improved, and the accuracy of the test result is ensured. The inner cavities are arranged on the inner ring part and the outer ring part, and the two inner cavities are communicated through the vent holes, so that the air tightness of the connection between the test threaded port and the dustproof cover as well as the test hose joint is further improved.

Description

Technical Field

[0001] The present utility model relates to the field of pressure measurement joints, and particularly to high-sealing pressure measurement joints. Background Art

[0002] The existing Chinese patent with the publication number CN216160071U discloses an integral pressure measurement joint, which specifically includes a pressure measurement joint body, a valve core, a spring, and a plunger arranged in the inner hole of the pressure measurement joint body. A retaining piece for restricting its position is arranged at the rear side of the plunger in the inner hole of the pressure measurement joint body. The retaining piece is conical, the outer diameter of the rear end of the retaining piece is larger than the inner diameter of the inner hole of the pressure measurement joint body, and a conical groove for assembling the retaining piece is arranged on the inner wall of the inner hole of the pressure measurement joint body. A sealing cap is arranged on the upper part of the pressure measurement joint body, and the sealing cap is in threaded fit with the upper part of the pressure measurement joint body. The plunger has reliable position limitation, a long service life, is convenient for assembly, and significantly reduces the cost.

[0003] As in the above patent, in the prior art, in the non-test working state, a dust cap, also known as a protective cap, is threadedly connected to the test interface part of the pressure measurement joint. In order to ensure the airtightness of the dust cap and also to improve the airtightness of the connection between the test interface and the test hose during testing, a sealing gasket is installed on one side of the pressure measurement joint close to its test interface. In the non-test state, the tightened end of the dust cap abuts against the sealing gasket to form a seal, reducing the entry of dust and other impurities. During testing, the joint of the test hose is tightened on the test interface and abuts against the sealing gasket to improve the airtightness during testing.

[0004] However, in the above prior art, since the same sealing gasket is used to ensure sealing both in the non-test working state, that is, under normal conditions, and in the test state, but the normal state time is long, the protective cap presses the sealing gasket for a long time, causing the sealing gasket to undergo plastic deformation, and at the same time, the sealing gasket is prone to form cracks and breakage. Especially after long-term compression resulting in plastic deformation and cracks, due to the tightening of the contact dust cap, and then the docking joint of the test hose is screwed in again, such operations further reduce the sealing performance of the sealing gasket during testing, affecting the test results. Summary of the Utility Model

[0005] In order to make up for the deficiencies of the prior art problems, the purpose of the present utility model is to provide a high-sealing pressure measurement joint that can avoid the sealing performance decline during testing caused by the long-term compression of the sealed part of the sealing gasket.

[0006] In order to solve the prior art problems, the technical solution of the present utility model is as follows:

[0007] High-sealing pressure measuring joint, including a joint body, one end of the joint body is formed with a mounting threaded port, the other end of the joint body is formed with a test threaded port, a dust cover is threadedly connected to one side of the joint body close to the test threaded port, a sealing gasket ring is fixed to one side of the joint body close to the dust cover, the sealing gasket ring is composed of an inner ring part on the side close to the axis of the joint body and an outer ring part on the side far from the axis of the joint body, and a gap is formed between the inner ring part and the outer ring part.

[0008] Preferably, a connecting piece is formed on one side of the joint body close to the sealing gasket ring, the sealing gasket ring is fixed on the connecting piece, chain holes are formed on both the connecting piece and the dust cover, and a chain is connected between the two chain holes.

[0009] Preferably, the inner diameter of the inner circle of the bottom surface of the dust cover is larger than the outer diameter of the inner ring part and smaller than the inner diameter of the outer ring part.

[0010] Preferably, inner cavities are formed at the central positions of the cross sections of both the inner ring part and the outer ring part, several ventilation holes are formed in the middle of the lower end of the sealing gasket ring, and both ends of the ventilation holes communicate with the two inner cavities respectively.

[0011] Preferably, several of the ventilation holes are arranged at equal angular intervals on the sealing gasket ring.

[0012] Preferably, the wall thicknesses of the sides of the inner ring part and the outer ring part close to each other are smaller than the wall thicknesses of the sides far from each other.

[0013] Preferably, the sealing gasket ring is made of rubber material.

[0014] Preferably, anti-slip lines are formed at equal intervals on the outer wall of the dust cover.

[0015] Compared with the prior art, the advantages of the present utility model are as follows:

[0016] 1. By setting the sealing gasket ring for completing the seal between the dust cover and the test threaded port and the seal between the test hose joint and the test threaded port into a dual structure of an inner ring part and an outer ring part, such that in the normal state and the test state, different parts of the sealing gasket ring are pressed. Since it is always the outer ring part that is pressed in the normal state and the inner ring part is not pressed, the inner ring part can have a good sealing effect during the test, thereby greatly improving the airtightness between the test hose joint and the test threaded port during the test and ensuring the accuracy of the test results;

[0017] 2. By providing inner cavities on the inner ring part and the outer ring part, and connecting the two inner cavities through vent holes, when the dust cover is tightened to compress the outer ring part, the gas inside the outer ring part is squeezed into the inner side of the inner ring part, causing the thinner part of the wall thickness near the gap on the inner ring part to deform and fit against the inner wall of the dust cover, thereby improving the sealing effect. The same effect is achieved when tightening the test hose connector, further enhancing the airtightness of the connection between the test threaded port, the dust cover, and the test hose connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 FIG. is a schematic diagram of the position of the chain hole of the present invention.

[0020] Figure 3 FIG. is a schematic diagram of the position of the gasket ring of the present invention.

[0021] Figure 4 FIG. is a schematic diagram of the structure of the gasket ring of the present invention.

[0022] Figure 5 FIG. is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0023] Figure 6 For the present invention Figure 5 Enlarged schematic diagram at position A.

[0024] Figure 7 FIG. is a schematic sectional view of the gasket ring of the present invention.

[0025] Figure 8 FIG. is a schematic diagram of the bottom surface of the dust cover of the present invention.

[0026] Reference numerals: 1, connector body; 101, installation threaded port; 102, test threaded port; 103, connecting piece; 2, dust cover; 3, gasket ring; 301, inner ring part; 302, outer ring part; 303, gap; 4, chain hole; 5, chain; 6, inner cavity; 7, vent hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0028] Embodiment 1, please refer to Figures 1 to 4 and Figure 8, this embodiment provides a highly sealed pressure measuring joint, including a joint body 1. One end of the joint body 1 is formed with an installation thread port 101, and the other end of the joint body 1 is formed with a test thread port 102. A dust cover 2 is threadedly connected to the side of the joint body 1 near the test thread port 102. Anti-slip lines are formed at equal intervals on the outer wall of the dust cover 2, and the anti-slip lines can increase the friction between the human hand and the outer wall of the dust cover 2;

[0029] The above-mentioned partial structure is the prior art. When installing and using, the installation thread port 101 on the joint body 1 is screwed tightly onto the object to be measured, so that the installation thread hole communicates with the inner wall of the object to be measured. Then, during the test, the operator can hold the test hose with a pressure gauge and connect the joint at the end of the test hose to the test thread port 102, thus realizing the connection of the test hose and the joint body 1. Then, the inner pressure value of the object to be measured can be displayed through the pressure gauge. After the test is completed, unscrew the joint, and then screw the dust cover 2 into the test thread port 102 to perform dust protection work on the test thread port 102;

[0030] A connecting piece 103 is formed on the side of the joint body 1 close to the dust cover 2. Chain 5 holes 4 are formed on both the connecting piece 103 and the dust cover 2. A chain 5 is connected between the two chain 5 holes 4, so that the dust cover 2 can be connected to the joint body 1 to avoid the situation of the dust cover 2 being lost after being removed;

[0031] A sealing gasket ring 3 is fixed on the side of the connecting piece 103 close to the dust cover 2. The sealing gasket ring 3 is made of rubber material. The sealing gasket ring 3 consists of an inner ring part 301 on the side close to the axis of the joint body 1 and an outer ring part 302 on the side far from the axis of the joint body 1, and a gap 303 is formed between the inner ring part 301 and the outer ring part 302; the inner diameter of the inner circle of the bottom surface of the dust cover 2 is larger than the outer diameter of the inner ring part 301 and smaller than the inner diameter of the outer ring part 302, so that when the dust cover 2 is screwed tightly, its bottom surface can only abut against the outer ring part 302;

[0032] When the dust cover 2 is screwed tightly, the bottom surface of the dust cover 2 presses against the outer ring part 302 instead of the inner ring part 301. During the test, the joint on the test hose presses against the inner ring part 301 instead of the outer ring part 302. Since the inner ring part 301 is not oppressed under normal conditions, the probability of aging of the inner ring part 301 is slowed down, and the sealing effect of the inner ring part 301 during the test is improved.

[0033] Embodiment Two, please refer to Figures 5 to 7, this embodiment provides a further technical solution based on Embodiment 1. Inner cavity 6 is formed at the central position of the cross-section of inner ring portion 301 and at the central position of the cross-section of outer ring portion 302. A number of ventilation holes 7 are formed at equal angular intervals in the middle of the lower end of sealing gasket ring 3. Both ends of ventilation holes 7 are respectively communicated with two inner cavities 6; the wall thicknesses of the sides of inner ring portion 301 and outer ring portion 302 close to each other are smaller than those of the sides far from each other; the wall thicknesses of the sides of inner ring portion 301 and outer ring portion 302 close to each other are thinner, which helps to increase their elastic deformation ability; while the wall thicknesses of the sides far from each other are thicker, which provides sufficient structural strength;

[0034] When tightening dust-proof cover 2, dust-proof cover 2 abuts against outer ring portion 302. The air in inner cavity 6 of the extruder enters the inside of inner ring portion 301 due to the extrusion of outer ring portion 302, thereby squeezing inner ring portion 301 to deform, and the overall thickness of outer ring portion 302 becomes thinner under extrusion. In this way, inner ring portion 301 can abut against the inner wall of dust-proof cover 2, thereby further improving the sealing effect. The same effect is achieved when tightening the joint on the test hose. During the test, it is outer ring portion 302 that deforms and abuts against the outer wall of the joint, thereby wrapping the outside of the joint or the inside of dust-proof cover 2, further improving the airtightness.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. High-sealing pressure measuring joint, comprising a joint body (1), one end of the joint body (1) is formed with a mounting threaded port (101), the other end of the joint body (1) is formed with a test threaded port (102), a dust-proof cover (2) is threadedly connected to the side of the joint body (1) close to the test threaded port (102), and a sealing gasket ring (3) is fixed to the side of the joint body (1) close to the dust-proof cover (2), characterized in that, The gasket ring (3) is composed of an inner ring part (301) on the side close to the axis of the joint body (1) and an outer ring part (302) on the side far from the axis of the joint body (1), and a gap (303) is formed between the inner ring part (301) and the outer ring part (302).

2. The high-sealing pressure measuring joint according to claim 1, wherein Therefore, a connecting piece (103) is formed on the side of the joint body (1) close to the gasket ring (3). The gasket ring (3) is fixed on the connecting piece (103). Chain holes (4) are formed on the connecting piece (103) and on the dust cover (2), and a chain (5) is connected between the two chain holes (4).

3. The high-sealing pressure measuring joint according to claim 2, wherein The inner diameter of the inner circle of the bottom surface of the dust cover (2) is larger than the outer diameter of the inner ring part (301) and smaller than the inner diameter of the outer ring part (302).

4. The high-sealing pressure measuring joint according to claim 3, characterized in that, Inner cavities (6) are formed at the central positions of the cross-sections of the inner ring part (301) and the outer ring part (302). A plurality of vent holes (7) are formed in the middle of the lower end of the gasket ring (3), and the two ends of the vent holes (7) are respectively communicated with the two inner cavities (6).

5. The high-sealing pressure measuring joint according to claim 4, characterized in that, The plurality of vent holes (7) are arranged on the gasket ring (3) at equal angular intervals.

6. The high-sealing pressure measuring joint according to claim 4, wherein, The wall thicknesses of the sides of the inner ring part (301) and the outer ring part (302) close to each other are smaller than the wall thicknesses of the sides far from each other.

7. The high-sealing pressure measuring joint according to claim 1, wherein, The gasket ring (3) is made of rubber material.

8. The high-sealing pressure measuring joint according to claim 1, characterized in that, Anti-slip lines are formed on the outer wall of the dust cover (2) at equal intervals.

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