Low-temperature stop valve with pressure relief guiding function

Abstract

The low-temperature stop valve with the pressure relief guiding function comprises a low-temperature stop valve body, a discharging port and a feeding port are formed in the two sides of the low-temperature stop valve body respectively, a pressure relief pipe is arranged at one end of the feeding port, one side of the inner wall of the pressure relief pipe is fixedly connected with a sealing connecting base, and the other side of the inner wall of the pressure relief pipe is fixedly connected with a pressure relief valve. A through hole is formed in the sealing connecting base, a sealing plug is inserted into one side of the through hole, the outer wall of the pressure relief pipe is sleeved with a flow guide pipe, the flow guide pipe is of an L-shaped structure, the inner wall of the flow guide pipe is fixedly connected with mounting grooves, the mounting grooves are distributed in a bilateral symmetry mode relative to the bisector of the bearing, and the mounting grooves and the sealing ring are both of a circular ring structure. A groove is formed in the outer wall of the pressure relief pipe and corresponds to the installation groove in position, sealing rings are arranged in the groove and the installation groove, a bearing is installed between the inner wall of the flow guide pipe and the outer wall of the pressure relief pipe, and the flow guide pipe is rotationally connected with the pressure relief pipe. According to the device, the flow direction of a pressure relief medium can be adjusted, so that the safety during pressure relief is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to low temperature stop valve technical field, concretely is a low temperature stop valve with pressure relief guiding function. BACKGROUND

[0002] Low temperature stop valve is a kind of valve specially designed for low temperature environment, usually applied in the pipeline system of liquefied natural gas (LNG), liquid oxygen (LOX), liquid nitrogen (LN2) and other low temperature fluids.

[0003] In order to improve the timely discharge of low temperature stop valve service pressure, it is usually necessary to open pressure relief port on low temperature stop valve, and the flow direction of medium cannot be adjusted when pressure relief, which is easy to cause impact on workers in the process of discharge, thus improvement is needed. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of low temperature stop valve with pressure relief guiding function to solve the problem that the flow direction of medium cannot be adjusted when low temperature stop valve pressure relief as described in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of low temperature stop valve with pressure relief guiding function, including low temperature stop valve main body, the two sides of low temperature stop valve main body are respectively provided with discharge port and feed port, the one end of feed port is provided with pressure relief pipe, the outer wall of pressure relief pipe is sleeved with flow guide pipe, flow guide pipe is "L" shape structure, the inner wall of flow guide pipe is fixedly connected with installation groove, the outer wall of pressure relief pipe is provided with recess, the recess and installation groove position correspond, the recess and installation groove are provided with sealing ring inside, bearing is installed between the inner wall of flow guide pipe and the outer wall of pressure relief pipe, flow guide pipe and pressure relief pipe constitute rotation connection.

[0006] Preferably, the installation groove is symmetrically distributed about the bisector of the bearing, and the installation groove and the sealing ring are both annular structures.

[0007] Preferably, the inner wall of the pressure relief pipe is fixedly connected with a sealing connector seat on one side, a through hole is formed in the sealing connector seat, and a sealing plug is inserted into one side of the through hole.

[0008] Preferably, the sealing plug is in a "T" shape structure, and the sealing plug and the sealing connector seat constitute a sliding connection.

[0009] Preferably, the outer wall of the sealing plug is fixedly connected with a movable spring and a limiting rod, and the movable spring and the limiting rod are both annularly and equally spaced with multiple.

[0010] Preferably, the outer wall of the sealing connection seat is provided with a groove, and a limiting sleeve is fixedly connected inside the groove. A limiting rod is inserted into one side of the limiting sleeve, and one side of the limiting rod has a "T" shape. The limiting rod and the limiting sleeve form a sliding connection.

[0011] Preferably, the movable spring is sleeved on the outer wall of the limiting rod and the limiting sleeve, and one side of the movable spring is fixedly connected to the groove on the outer wall of the sealing connection seat.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) This device can adjust the flow direction of the pressure relief medium, thereby ensuring safety during pressure relief.

[0014] (2) This device has a rotatable guide tube installed on the outer wall of the pressure relief pipe, so that the direction of the guide tube can be adjusted according to the actual situation, so that the medium will not cause impact damage to people during the pressure relief process, thus improving the pressure relief safety.

[0015] (3) This device uses a sliding sealing plug inside the pressure relief pipe. The sealing plug can be connected or separated from the sealing connection seat by sliding. When the pressure is too high, it pushes the sealing plug to separate from the sealing connection seat, thereby performing pressure relief. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a cryogenic shut-off valve with pressure relief guiding function according to this utility model;

[0017] Figure 2 This is a side sectional view of the connection between the flow guide pipe and the pressure relief pipe of a cryogenic shut-off valve with pressure relief guiding function according to this utility model.

[0018] Figure 3 This utility model relates to a cryogenic shut-off valve with a pressure relief guiding function. Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 This is a side view of the connection between the sealing plug and the limiting rod of a cryogenic shut-off valve with pressure relief and guiding function according to this utility model.

[0020] Figure 5 This is a cross-sectional view of the connection between the limiting rod and the limiting sleeve of a cryogenic shut-off valve with pressure relief and guiding function according to this utility model.

[0021] In the diagram: 1. Low-temperature shut-off valve body; 2. Discharge port; 3. Inlet port; 4. Guide pipe; 5. Pressure relief pipe; 6. Mounting groove; 7. Sealing ring; 8. Bearing; 9. Sealing plug; 10. Limiting rod; 11. Movable spring; 12. Limiting sleeve; 13. Sealing connection seat. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-5 This utility model provides a technical solution: a cryogenic shut-off valve with pressure relief and guiding function, comprising a cryogenic shut-off valve body 1, with an outlet 2 and an inlet 3 respectively provided on both sides of the cryogenic shut-off valve body 1, a pressure relief pipe 5 provided at one end of the inlet 3, a sealing connection seat 13 fixedly connected to one side of the inner wall of the pressure relief pipe 5, a through hole provided on the sealing connection seat 13, and a sealing plug 9 inserted into one side of the through hole; the sealing plug 9 has a "T" shaped structure, and the sealing plug 9 and the sealing connection seat 13 form a sliding connection; a movable spring 11 and a limiting rod 10 are fixedly connected to the outer wall of the sealing plug 9. Multiple movable springs 11 and limiting rods 10 are evenly distributed in a ring around the outer wall of the sealing plug 9. This structure allows the sealing plug 9 to slide open under pressure and automatically return to its original position after the pressure decreases, achieving automatic sealing. The outer wall of the sealing connection seat 13 has a groove, inside which a limiting sleeve 12 is fixedly connected. A limiting rod 10 is inserted into one side of the limiting sleeve 12, and one side of the limiting rod 10 has a "T" shape. The limiting rod 10 and the limiting sleeve 12 form a sliding connection. This structure, through the limiting sleeve 12 and the limiting rod 10… This ensures accurate alignment between the sealing plug 9 and the sealing connection seat 13, preventing misalignment. The movable spring 11 is sleeved on the outer wall of the limiting rod 10 and the limiting sleeve 12, with one side of the movable spring 11 fixedly connected to the groove on the outer wall of the sealing connection seat 13. This structure, through the limiting rod 10 and the limiting sleeve 12, can limit the movable spring 11 while ensuring its normal extension and retraction. A guide pipe 4 is sleeved on the outer wall of the pressure relief pipe 5. The guide pipe 4 has an "L"-shaped structure, and an installation groove 6 is fixedly connected to the inner wall of the guide pipe 4. The bisectors of bearing 8 are symmetrically distributed, and both mounting groove 6 and sealing ring 7 are annular structures. This structure allows the guide tube 4 to rotate via bearing 8. The outer wall of pressure relief pipe 5 has a groove corresponding to the mounting groove 6. Sealing ring 7 is installed inside the groove and mounting groove 6. Bearing 8 is installed between the inner wall of guide tube 4 and the outer wall of pressure relief pipe 5, forming a rotating connection between guide tube 4 and pressure relief pipe 5. This device ensures the seal at the connection between guide tube 4 and pressure relief pipe 5 via sealing ring 7, and also increases friction to prevent guide tube 4 from rotating too fast via bearing 8.

[0024] Working principle: When using this cryogenic shut-off valve with pressure relief guidance function, first adjust the angle of the guide pipe 4 according to the direction in which the medium can be discharged. During adjustment, rotate the guide pipe 4 so that the guide pipe 4 rotates to a suitable angle on the outer wall of the pressure relief pipe 5 through the bearing 8. When the pressure is too high, the medium pushes the sealing plug 9, causing the sealing plug 9 to slowly separate from the sealing connection seat 13. The medium enters the interior of the pressure relief pipe 5 through the gap between the sealing connection seat 13 and the sealing plug 9 and then is discharged from the guide pipe 4. When the pressure decreases, the sealing plug 9 is slowly reinserted into the sealing connection seat 13 under the action of the movable spring 11 to achieve a seal, ensuring the safety of using this device.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cryogenic shut-off valve with pressure relief guiding function, comprising a cryogenic shut-off valve body (1), wherein a discharge port (2) and a feed port (3) are respectively provided on both sides of the cryogenic shut-off valve body (1), characterized in that: One end of the feed inlet (3) is provided with a pressure relief pipe (5), and the outer wall of the pressure relief pipe (5) is fitted with a guide pipe (4). The guide pipe (4) has an "L" shaped structure. The inner wall of the guide pipe (4) is fixedly connected with an installation groove (6). The outer wall of the pressure relief pipe (5) is provided with a groove. The groove corresponds to the installation groove (6). The groove and the installation groove (6) are provided with a sealing ring (7). A bearing (8) is installed between the inner wall of the guide pipe (4) and the outer wall of the pressure relief pipe (5). The guide pipe (4) and the pressure relief pipe (5) form a rotating connection.

2. A cryogenic shut-off valve with pressure relief guiding function according to claim 1, characterized in that: The mounting groove (6) is symmetrically distributed about the bisector of the bearing (8), and both the mounting groove (6) and the sealing ring (7) are circular ring structures.

3. A cryogenic shut-off valve with pressure relief guiding function according to claim 1, characterized in that: A sealing connector (13) is fixedly connected to one side of the inner wall of the pressure relief pipe (5). A through hole is provided on the sealing connector (13), and a sealing plug (9) is inserted into one side of the through hole.

4. A cryogenic shut-off valve with pressure relief guiding function according to claim 3, characterized in that: The sealing plug (9) has a "T" shaped structure, and the sealing plug (9) and the sealing connection seat (13) form a sliding connection.

5. A cryogenic shut-off valve with pressure relief guiding function according to claim 3, characterized in that: The outer wall of the sealing plug (9) is fixedly connected to a movable spring (11) and a limiting rod (10). The movable spring (11) and the limiting rod (10) are distributed in multiple annular intervals around the outer wall of the sealing plug (9).

6. A cryogenic shut-off valve with pressure relief guiding function according to claim 3, characterized in that: The outer wall of the sealing connection seat (13) is provided with a groove, and a limiting sleeve (12) is fixedly connected inside the groove. A limiting rod (10) is inserted into one side of the limiting sleeve (12). One side of the limiting rod (10) has a "T" shaped structure. The limiting rod (10) and the limiting sleeve (12) form a sliding connection.

7. A cryogenic shut-off valve with pressure relief guiding function according to claim 5, characterized in that: The movable spring (11) is sleeved on the outer wall of the limiting rod (10) and the limiting sleeve (12), and one side of the movable spring (11) is fixedly connected to the groove on the outer wall of the sealing connection seat (13).

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