Buffering movable joint device for straight-through universal pressure-rotating pressure gauge

Abstract

The utility model discloses a straight-through universal under-pressure rotating pressure gauge buffer movable joint device, which comprises a pressure gauge joint and a joint main body, the pressure gauge joint is used for positioning a pressure gauge on a pressure tapping joint of a pipeline, the pressure gauge joint is axially inserted into a stepped inner hole of the joint main body, and a combined sealing ring is arranged at the root of the stepped inner hole. The pressure gauge connector is sleeved with a sealing seat and a locking nut, the locking nut is in threaded fit with the stepped inner hole, the sealing seat is pressed on the combined sealing ring of the stepped inner hole, and a stop screw capable of being limited on a threaded outer ring of the locking nut is positioned on the side portion of the connector body. Annular semicircular arc grooves are formed in the positions, adjacent to the inner hole of the locking nut and the inner hole of the sealing seat, of the outer circumference of the pressure gauge connector, and steel balls are installed in the two annular semicircular arc grooves in a pressed mode. According to the utility model, the observation of the pressure gauge can be adaptively adjusted under the condition of pressure, thereby facilitating the field observation and operation.

Description

Technical Field

[0001] The utility model relates to a buffer union device, which can be specifically applied to, for example, a buffer union device for a direct-through universal pressure gauge with pressure and rotation, and belongs to the technical field of application of pressure gauge joints. Background Art

[0002] Generally, after the pressure gauge is installed, due to the fixed connection forms such as the threaded connection of the pressure gauge, the observation direction of the pressure gauge is constant, that is, the observation direction cannot be accurately controlled. The operator needs to rotate around the pressure gauge by himself to adapt to the monitoring and observation of the surface data of the pressure gauge, and the operation convenience is not strong. Moreover, in the early assembly process, due to the inconsistent progress of the assembly rotating pair, it may cause the display end face of the pressure gauge at some positions not to face the easily observable side. Therefore, the requirements for the early design of the pressure gauge are relatively high, resulting in increased costs. Summary of the Invention

[0003] Aiming at the deficiencies in the above-mentioned prior art, the utility model provides a buffer union device for a direct-through universal pressure gauge with pressure and rotation, which can adaptively adjust the observation of the pressure gauge under the condition of pressure, facilitate on-site observation and operation, and reduce the assembly requirements in the early stage at the same time.

[0004] To achieve the above object, the technical solution of the utility model is as follows: A buffer union device for a direct-through universal pressure gauge with pressure and rotation, which includes a pressure gauge joint and a joint body for positioning the pressure gauge on the pressure tapping head of the pipeline. The pressure gauge joint is axially inserted into the stepped inner hole of the joint body, and a combined sealing ring is arranged at the root of the stepped inner hole. A sealing seat and a locking nut are sleeved on the pressure gauge joint. The locking nut is in threaded cooperation with the stepped inner hole and presses the sealing seat on the combined sealing ring of the stepped inner hole. A set screw is positioned on the side of the joint body and can be limited on the outer thread of the locking nut. Annular semi-circular arc grooves are arranged at the adjacent positions of the inner holes of the locking nut and the sealing seat and at the corresponding outer circumferential positions of the pressure gauge joint, and steel balls are press-fitted in the two annular semi-circular arc grooves.

[0005] Further, the joint body is positioned on the pressure tapping head through a pressure gauge stop valve, and a first sealing ring is arranged between the pressure gauge stop valve and the joint body.

[0006] Further, the pressure gauge is threadedly connected to the stepped inner hole of the pressure gauge joint, and a second sealing ring is arranged between the pressure gauge and the pressure gauge joint.

[0007] Further, a throttle hole is arranged in the pressure gauge joint.

[0008] Advantages of the present utility model: Through the transfer of this union device, the observation of the pressure gauge can be adaptively adjusted under pressurized conditions, facilitating on-site observation and operation; at the same time, since the pressure gauge can be rotated during observation, the assembly requirements during the assembly of the pressure gauge and the pipeline are reduced, and there is no need to forcibly require the display screen of the pressure gauge to face the operator, reducing the assembly difficulty. Brief Description of the Drawings

[0009] Figure 1 is a schematic structural view of the present utility model;

[0010] Figure 2 is Figure 1 a sectional view along line A-A in

[0011] Figure 3 a schematic structural view of the present utility model in the use state. Detailed Description of the Embodiment

[0012] The present utility model will be further described in detail below in conjunction with specific embodiments and the drawings.

[0013] A straight-through universal pressure gauge buffer union device under pressure rotation as Figures 1-3 shown, which includes a pressure gauge adapter 3 and a joint body 9 for positioning the pressure gauge 1 on the pressure tapping joint 12 of the pipeline. The pressure gauge adapter 3 is axially inserted into the stepped inner hole of the joint body 9, and a combined sealing ring 8 is provided at the root of the stepped inner hole. A sealing seat 6 and a locking nut 4 are sleeved on the pressure gauge adapter 3. The locking nut 4 is in threaded cooperation with the stepped inner hole and presses the sealing seat 6 against the combined sealing ring 8 in the stepped inner hole. A set screw 7 is positioned on the side of the joint body 9 and can be limited to the threaded outer ring of the locking nut 4; annular semi-circular grooves are provided at adjacent positions of the inner holes of the locking nut 4 and the sealing seat 6 and at the corresponding outer circumferential positions of the pressure gauge adapter 3. Steel balls 5 are press-fitted into the two annular semi-circular grooves.

[0014] The structure of this solution is simple. By directly using the dynamic sealing connection between the pressure gauge adapter 3, the steel balls 5, the sealing seat 6 and the locking nut 4, the pressurized rotation of the pressure gauge is realized. Finally, the pressure gauge can be freely rotated and adjusted in direction under pressurized conditions to facilitate the operator's observation and operation of the pressure gauge. Here, the positions where the annular semi-circular grooves are provided can be diverse. For example, they can be directly provided on the inner hole wall of the sealing seat 6 and the corresponding outer circumferential position of the pressure gauge adapter 3. However, this solution is prone to difficult press-fitting of the steel balls, and in severe cases, it may even damage the inner surface of the sealing seat or the outer surface of the pressure gauge adapter. Therefore, in this case, the annular semi-circular grooves are directly provided on the inner hole connection surfaces of the sealing seat 6 and the locking nut 4, thereby greatly reducing the assembly strength and difficulty and improving the assembly efficiency.

[0015] In the solution, the joint body 9 is positioned on the pressure tapping joint 12 through the pressure gauge stop valve 11. A first sealing ring 10 is arranged between the pressure gauge stop valve 11 and the joint body 9. Specifically, the joint body 9 is threadedly connected to the pressure gauge stop valve 11, and the first sealing ring 10 is arranged therebetween for sealing. The lower part of the pressure gauge stop valve 11 is connected to the pressure tapping joint 12 on the pressure pipeline by NPT thread. The pressure gauge 1 is threadedly connected to the stepped inner hole of the pressure gauge joint 3, and a second sealing ring 2 is arranged between the pressure gauge 1 and the pressure gauge joint 3.

[0016] Finally, a throttle hole 13 is arranged in the pressure gauge joint 3 to control the flow rate. When the fluid medium passes through the throttle hole 13, it quickly diffuses at the large hole and then reduces the flow rate, preventing the fluid medium from entering the pressure gauge too quickly and impacting the pressure gauge, so as to improve the safety guarantee during use.

[0017] The technical solutions provided by the embodiments of the present invention have been introduced in detail above. Specific examples are used in this article to elaborate on the principles and implementation manners of the embodiments of the present invention. The descriptions of the above embodiments are only applicable to help understand the principles of the embodiments of the present invention; at the same time, for those of ordinary skill in the art, according to the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A direct-through universal pressure gauge buffer union device with pressure rotation, characterized in that: It includes a pressure gauge adapter (3) and a joint body (9) for positioning a pressure gauge (1) on a pressure tapping (12) of a pipeline. The pressure gauge adapter (3) is axially inserted into a stepped inner hole of the joint body (9), and a combined sealing ring (8) is arranged at the root of the stepped inner hole. A sealing seat (6) and a locking nut (4) are sleeved on the pressure gauge adapter (3). The locking nut (4) is in threaded fit with the stepped inner hole and presses the sealing seat (6) against the combined sealing ring (8) of the stepped inner hole. A stop screw (7) is positioned on the side of the joint body (9) and can be limited on the outer thread of the locking nut (4). Annular semi-circular grooves are arranged at the adjacent positions of the inner holes of the locking nut (4) and the sealing seat (6) and at the corresponding outer circumferential positions of the pressure gauge adapter (3). Steel balls (5) are press-fitted into the two annular semi-circular grooves.

2. The buffer union device of a direct-through universal pressure gauge with pressure rotation according to claim 1, wherein: The joint body (9) is positioned on the pressure tapping (12) through a pressure gauge stop valve (11), and a first sealing ring (10) is arranged between the pressure gauge stop valve (11) and the joint body (9).

3. The buffer union device of the direct-through universal pressure gauge with pressure rotation according to claim 1, characterized in that: The pressure gauge (1) is threadedly connected to the stepped inner hole of the pressure gauge adapter (3), and a second sealing ring (2) is arranged between the pressure gauge (1) and the pressure gauge adapter (3).

4. The buffer union device of a direct-through universal pressure gauge with a pressed rotation according to claim 1, characterized in that: A throttle hole (13) is arranged in the pressure gauge adapter (3).

Images