Pressure measuring nozzle with self-expanding sealing plug

Abstract

The utility model discloses a pressure measuring nozzle with a self-expanding sealing plug. The pressure measuring nozzle comprises a connecting nozzle, a sealing plug and a hollow screw, the connecting nozzle is used for connecting a pressure measuring instrument, a pressure measuring channel is arranged in the connecting nozzle, and an internal thread structure is arranged on the inner wall of the pressure measuring channel; the hollow screw comprises a screw head and a screw rod, and a hollow channel is formed in the hollow screw; the screw rod is screwed into the pressure measuring channel through screw-thread fit, and the pressure measuring channel is communicated with the hollow channel; the sealing plug is clamped between the connecting nozzle and the screw head; a sleeve hole matched with the screw rod in an inserting manner is formed in the sealing plug; the sealing plug is an elastic plug body, when the screw rod is screwed into the pressure measuring channel, the distance between the screw head and the connecting nozzle is shortened, and the sealing plug is extruded and expanded outwards. According to the utility model, the universality of the pressure measuring nozzle in size can be improved, and the consumption of a raw material belt is saved.

Description

Technical Field

[0001] This utility model relates to a pressure testing nozzle, and more particularly to a pressure testing nozzle with a self-expanding sealing plug. Background Technology

[0002] During the routine maintenance of gas pressure regulating cabinets, it is necessary to test various pressure parameters of the gas equipment using a pagoda-shaped pressure test nozzle. Since different manufacturers install internal thread ball valves of varying sizes, different sizes of external thread pagoda nozzles are required for pressure testing, which is very inconvenient. Furthermore, to ensure airtightness, Teflon tape must be wrapped around the nozzle during installation to prevent leaks, which is both time-consuming and material-intensive. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a pressure test nozzle with a self-expanding sealing plug, which can improve the versatility of the pressure test nozzle in terms of size and save the consumption of raw material tape.

[0004] Technical Solution: To achieve the above objectives, this utility model provides a pressure testing nozzle with a self-expanding sealing plug, comprising a connecting nozzle, a sealing plug, and a hollow screw; the connecting nozzle is used to connect to a pressure testing instrument, and has a pressure testing channel inside, with an internal thread structure on the inner wall of the pressure testing channel; the hollow screw includes a screw head and a screw rod, and has a hollow channel inside; the screw rod is screwed into the pressure testing channel through a threaded engagement, and the pressure testing channel and the hollow channel are interconnected; the sealing plug is sandwiched between the connecting nozzle and the screw head, and has a sleeve hole for insertion and engagement with the screw rod; the sealing plug is an elastic plug body, and when the screw rod is screwed into the pressure testing channel, the distance between the screw head and the connecting nozzle is shortened, squeezing the sealing plug outward.

[0005] Furthermore, a locking nut is provided at one end of the connector near the sealing plug, and the sealing plug is sandwiched between the screw head and the locking nut.

[0006] Furthermore, a sealing gasket is provided between the sealing plug and the locking nut.

[0007] Furthermore, the locking nut is equipped with a handle.

[0008] Furthermore, the handle is a bent rod that is curved into a semi-circular shape, and the bent rod is hinged to the locking nut. The top of the bent rod is higher than the connecting mouth, and the bent rod can rotate back and forth on both sides of the connecting mouth.

[0009] Furthermore, the two ends of the bent rod are opposite each other, and slots are respectively provided on both sides of the locking nut; the two ends of the bent rod are respectively inserted into the two slots, and the ends of the bent rod can rotate in the slots.

[0010] Furthermore, the sealing plug is a conical plug body, with the small-diameter end of the sealing plug close to the screw head and the large-diameter end of the sealing plug close to the connecting nozzle.

[0011] Furthermore, the sealing plug is a silicone plug.

[0012] Beneficial effects: This utility model provides a pressure testing nozzle with a self-expanding sealing plug, which replaces the original PTFE tape with a sealing plug, saving the consumption of PTFE tape; the sealing plug can be squeezed by the cooperation of the locking nut and the hollow screw, causing the sealing plug to expand outward and achieve effective sealing; in addition, the outward expansion of the sealing plug also allows the pressure testing nozzle to adapt to pipe openings of different sizes, thereby improving the versatility of the pressure testing nozzle in terms of size. Attached Figure Description

[0013] Appendix Fig. 1 This is a schematic diagram of the overall structure of the pressure measuring nozzle of this utility model;

[0014] Appendix Fig. 2 This is an exploded view of the pressure gauge components;

[0015] Appendix Fig. 3 This is a schematic diagram of the internal structure of the pressure gauge. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] As attached Figs. 1 to 3 The pressure testing nozzle with a self-expanding sealing plug includes a connecting nozzle 1, a sealing plug 2, and a hollow screw 3. (See attached image) Fig. 1 As shown, the connector 1 is pagoda-shaped and is used to connect to a pressure measuring instrument. Specifically, the connector 1 is connected to the pipe of the pressure measuring instrument. The connector 1 has a pressure measuring channel 4 inside, and the inner wall of the pressure measuring channel 4 has an internal thread structure.

[0018] The hollow screw 3 includes a screw head 5 and a screw rod 6, and has a hollow channel 7 inside, which extends through the screw rod 6 along its length. The screw rod 6 has an external thread structure, and it is screwed into the pressure measuring channel 4 through the threaded engagement. The pressure measuring channel 4 and the hollow channel 7 are interconnected. The sealing plug 2 is sandwiched between the connecting nozzle 1 and the screw head 5, and has a sleeve hole 8 for insertion into the screw rod 6. The sealing plug 2 is an elastic plug, specifically a conical silicone plug. The small-diameter end of the sealing plug 2 is close to the screw head 5, and the large-diameter end is close to the connecting nozzle 1. Because the sealing plug 2 is conical, it can be inserted into pipe openings of different diameters. When the screw rod 6 is screwed into the pressure measuring channel 4, it shortens the distance between the screw head 5 and the connecting nozzle 1, causing the screw head 5 and the connecting nozzle 1 to press against the sealing plug 2. The sealing plug 2 expands outward after being compressed.

[0019] In practical applications, when the pressure testing nozzle is installed on the valve port, the sealing plug 2 is inserted into the port accordingly. Then, the sealing plug 2 is squeezed, causing it to expand outwards and seal the gap between it and the port, achieving an effective seal. Since the sealing plug 2 replaces Teflon tape, the consumption of Teflon tape is eliminated, as is the time required for wrapping and cleaning it, thus improving pressure testing efficiency. Furthermore, the outward expansion of the sealing plug 2 allows the pressure testing nozzle of this invention to adapt to pipe diameters, thereby improving its versatility in terms of size. During routine maintenance of the gas pressure regulating cabinet, it is not necessary to carry multiple pressure testing nozzles of different diameters.

[0020] A locking nut 9 is provided at one end of the connector 1 near the sealing plug 2, and the sealing plug 2 is clamped between the screw head 5 and the locking nut 9. In actual application, after the sealing plug 2 is inserted into the pipe opening, the sealing plug 2 is squeezed by the pipe opening and clamps the hollow screw 3. Then the operator manually tightens the locking nut 9. Because the hollow screw 3 is clamped, it will not rotate when the locking nut 9 is tightened, thereby shortening the distance between the locking nut 9 and the screw head 5. The locking nut 9 and the screw head 5 cooperate to clamp the sealing plug 2, causing the sealing plug 2 to expand outward and improve the sealing effect of the sealing plug 2 on the pipe opening. A sealing gasket 10 is also provided between the sealing plug 2 and the locking nut 9 to prevent air leakage between the locking nut 9 and the hollow screw 3.

[0021] To facilitate tightening and loosening the locking nut 9, a handle 11 is also installed on the locking nut 9. Specifically, the handle 11 is a bent rod in a semi-circular shape, hinged to the locking nut 9. The top of the bent rod is higher than the connecting mouth 1, allowing the bent rod to rotate back and forth on both sides of the connecting mouth 1. The two ends of the bent rod face each other, and slots 12 are respectively opened on both sides of the locking nut 9; the two ends of the bent rod are inserted into the two slots 12 respectively, and the ends of the bent rod can rotate within the slots 12. The operator can tighten and loosen the locking nut 9 by using the handle 11, which saves effort.

[0022] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A pressure testing nozzle with a self-expanding sealing plug, characterized in that: It includes a connecting nozzle (1), a sealing plug (2), and a hollow screw (3); the connecting nozzle (1) is used to connect a pressure measuring instrument, and the connecting nozzle (1) has a pressure measuring channel (4), and the inner wall of the pressure measuring channel (4) has an internal thread structure; the hollow screw (3) includes a screw head (5) and a screw rod (6), and the hollow screw (3) has a hollow channel (7); the screw rod (6) is screwed into the pressure measuring channel (4) through threaded engagement, and the pressure measuring channel (4) and the hollow channel (7) are interconnected; the sealing plug (2) is sandwiched between the connecting nozzle (1) and the screw head (5), and the sealing plug (2) has a sleeve hole (8) that engages with the screw rod (6); the sealing plug (2) is an elastic plug body, and when the screw rod (6) is screwed into the pressure measuring channel (4), the distance between the screw head (5) and the connecting nozzle (1) is shortened, and the sealing plug (2) is squeezed outward.

2. The pressure testing nozzle with a self-expanding sealing plug according to claim 1, characterized in that: A locking nut (9) is provided on one end of the connector (1) near the sealing plug (2), and the sealing plug (2) is sandwiched between the screw head (5) and the locking nut (9).

3. A pressure testing nozzle with a self-expanding sealing plug according to claim 2, characterized in that: A sealing gasket (10) is provided between the sealing plug (2) and the locking nut (9).

4. A pressure testing nozzle with a self-expanding sealing plug according to claim 2, characterized in that: The locking nut (9) is equipped with a handle (11).

5. A pressure testing nozzle with a self-expanding sealing plug according to claim 4, characterized in that: The handle (11) is a bent rod in a semi-circular shape, which is hinged to the locking nut (9). The top of the bent rod is higher than the connecting mouth (1), and the bent rod can flip back and forth on both sides of the connecting mouth (1).

6. A pressure testing nozzle with a self-expanding sealing plug according to claim 5, characterized in that: The two ends of the bent rod are opposite each other, and slots (12) are respectively provided on both sides of the locking nut (9); the two ends of the bent rod are respectively inserted into the two slots (12), and the end of the bent rod can rotate in the slot (12).

7. A pressure testing nozzle with a self-expanding sealing plug according to claim 1, characterized in that: The sealing plug (2) is a conical plug body. The small diameter end of the sealing plug (2) is close to the screw head (5), and the large diameter end of the sealing plug (2) is close to the connecting nozzle (1).

8. A pressure testing nozzle with a self-expanding sealing plug according to claim 7, characterized in that: The sealing plug (2) is a silicone plug.

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