Durable pressure release valve

Abstract

A durable pressure relief valve comprises a connecting seat and a pressure relief head, the connecting seat comprises a base and a top seat, a spiral groove is formed in the outer wall of the top seat in a surrounding mode, and the spiral groove is communicated with a liquid flow cavity through a pressure relief opening formed in the spiral groove; the pressure relief head is provided with a bottom groove and a liquid outlet, the top seat penetrates into the bottom groove, the pressure relief head is provided with a transverse hole, the transverse hole is provided with a pressure relief assembly, the pressure relief assembly comprises a fastening block, a spring and a blocking ball, the fastening block, the spring and the blocking ball are sequentially matched in an abutting mode, the outer end of the blocking ball penetrates into the bottom groove and blocks the pressure relief opening, and the blocking ball can be in sliding rail fit with the spiral groove. Pressure relief is carried out by breaking through the blocking ball, the blocking ball retracts into the transverse hole to avoid the blocking ball when being broken through, the displacement of the blocking ball does not exceed the radius value of the blocking ball, rapid avoiding is achieved, continuous high-pressure impact is prevented, meanwhile, liquid flowing out of the pressure relief opening is guided to the liquid outlet through the spiral groove, backflow and backflushing of the liquid flowing out of the pressure relief opening are prevented, and protection of the pressure relief assembly is guaranteed. And long-term working performance is maintained, the service life is prolonged, and durability is higher.

Description

Technical Field

[0001] The utility model relates to the field of control valves, and particularly relates to a durable pressure relief valve. Background Art

[0002] At present, for the existing pressure relief valves, after pressure relief occurs, the subsequent working performance is likely to decline. The main reasons are that the pressure relief components continuously bear the impact for a long time, and the liquid flow after pressure relief is not well guided, resulting in partial backflow, which easily causes the deviation or damage of the pressure relief components and shortens the service life. Summary of the Utility Model

[0003] In order to solve the above problems, the utility model provides a durable pressure relief valve:

[0004] A durable pressure relief valve includes a connection seat and a pressure relief head. A liquid flow cavity is arranged in the connection seat, and a liquid inlet is arranged at the bottom. The connection seat includes a base and a top seat. The top seat is fixed on the top of the base and is columnar. A spiral groove is arranged around the outer wall of the top seat. The spiral groove is communicated with the liquid flow cavity through a pressure relief port provided. The pressure relief head is provided with a bottom groove and a liquid outlet which are communicated with each other. The top seat penetrates into the bottom groove, and the liquid outlet is located above the bottom groove. A transverse hole is arranged on the side of the bottom groove of the pressure relief head, and a pressure relief component is installed in the transverse hole. The pressure relief component includes a fastening block, a spring and a plug ball. The fastening block, the spring and the plug ball are sequentially abutted and matched. The outer end of the plug ball penetrates into the bottom groove and blocks the pressure relief port, and the plug ball can form a sliding rail fit with the spiral groove.

[0005] Preferably, an annular wall is arranged on the top of the base. The top seat is coaxially located inside the annular wall. The annular wall is provided with a positioning hole coaxially with the pressure relief port. The positioning hole is provided with a positioning bolt for threaded connection with the transverse hole. When installing the pressure relief head, through the threaded connection between the positioning bolt and the transverse hole, the position of the plug ball blocking the pressure relief port can be accurately positioned, and at the same time, the installation stability of the pressure relief head can be improved.

[0006] Preferably, a limiting shoulder is arranged at the inner end of the transverse hole. The limiting shoulder is used to prevent the plug ball from detaching from the transverse hole. When the outer end of the plug ball is not stressed, the plug ball abuts against the limiting shoulder, and when the plug ball slides on the spiral groove or blocks the pressure relief port, the plug ball shrinks and does not contact the limiting shoulder.

[0007] Preferably, at least two pressure relief ports are provided, and corresponding transverse holes and pressure relief components are arranged to improve the installation stability and the pressure relief performance.

[0008] Preferably, a funnel-shaped filter cover is arranged in the liquid flow cavity. The filter cover is threadedly connected in the base to reduce the occurrence rate of foreign object blockage during pressure relief.

[0009] The utility model has the following beneficial effects: The pressure is relieved by flushing open the plug ball, and when the plug ball is flushed open, it will shrink into the transverse hole to avoid being impacted, and the displacement of the plug ball does not exceed its radius value, realizing rapid avoidance and preventing continuous high-pressure impact. At the same time, the liquid flow coming out of the pressure relief port is guided to the liquid outlet through the liquid flow channel formed by the spiral groove, preventing its backflow and backwash, providing protection for the pressure relief component, maintaining long-term working performance, improving service life, and being more durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic structural view of an embodiment.

[0011] Figure 2 It is a schematic internal structural view of an embodiment.

[0012] Figure 3 It is a schematic view of the working principle of the pressure relief component of an embodiment.

[0013] 1. Pressure relief head; 2. Liquid flow cavity; 3. Liquid inlet; 4. Base; 5. Top seat; 6. Spiral groove; 7. Pressure relief port; 8. Bottom groove; 9. Liquid outlet; 10. Transverse hole; 11. Fastening block; 12. Spring; 13. Plug ball; 14. Annular wall; 15. Positioning hole; 16. Positioning bolt; 17. Limiting shoulder; 18. Filter cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following further describes the present utility model in conjunction with Figures 1 to 3 the embodiments.

[0015] A durable pressure relief valve includes a connection seat and a pressure relief head 1. A liquid flow cavity 2 is provided in the connection seat and a liquid inlet 3 is provided at the bottom. The connection seat includes a base 4 and a top seat 5. A funnel-shaped filter cover 18 is provided in the liquid flow cavity 2, and the filter cover 18 is threadedly connected in the base 4 to reduce the incidence of foreign matter blockage during pressure relief. The top seat 5 is fixed on the top of the base 4 and is columnar. A spiral groove 6 is provided around the outer wall of the top seat 5, and the spiral groove 6 is communicated with the liquid flow cavity 2 through a provided pressure relief port 7; the pressure relief head 1 is provided with a bottom groove 8 and a liquid outlet 9 that are communicated with each other. The top seat 5 penetrates into the bottom groove 8, and the liquid outlet 9 is located above the bottom groove 8. The pressure relief head 1 is provided with a transverse hole 10 on the side of the bottom groove 8, and a pressure relief component is installed in the transverse hole 10. The pressure relief component includes a fastening block 11, a spring 12 and a plug ball 13. The fastening block 11 is threadedly engaged in the transverse hole 10, and the fastening block 11, the spring 12 and the plug ball 13 are sequentially abutted and matched. The outer end of the plug ball 13 penetrates into the bottom groove 8 and blocks the pressure relief port 7, and the plug ball 13 can form a sliding rail fit with the spiral groove 6.

[0016] The top of the base 4 is provided with an annular wall 14. The top seat 5 is coaxially located inside the annular wall 14. The annular wall 14 is provided with a positioning hole 15 coaxial with the pressure relief port 7. The positioning hole 15 is provided with a positioning bolt 16 for threaded connection to the transverse hole 10. When installing the pressure relief head 1, through the threaded connection between the positioning bolt 16 and the transverse hole 10, the position of the plug ball blocking the pressure relief port 7 can be accurately positioned, and at the same time, the installation stability of the pressure relief head 1 can be improved.

[0017] A limiting shoulder 17 is provided at the inner end of the transverse hole 10. The limiting shoulder 17 is used to prevent the plug ball 13 from detaching from the transverse hole 10. When the outer end of the plug ball 13 is not stressed, the plug ball 13 abuts against the limiting shoulder 17. When the plug ball 13 slides on the spiral groove 6 or blocks the pressure relief port 7, the plug ball 13 retracts and does not contact the limiting shoulder 17.

[0018] Two pressure relief ports 7 are provided, and the transverse holes 10 and the pressure relief components are correspondingly arranged to improve the installation stability and the pressure relief performance.

[0019] Installation and working principle: The pressure relief head 1 equipped with the pressure relief component is installed on the top seat 5 in a manner similar to threaded connection. This can be achieved by rotating the pressure relief head 1 to make the plug ball 13 slide along the spiral groove 6. When the pressure relief head 1 is rotated to a position where the positioning bolt 16 can be threadedly connected to the transverse hole 10, that is, the state where the plug ball 13 blocks the pressure relief port 7 is reached. At this time, operate the threaded connection of the positioning bolt 16, and the installation of the pressure relief head 1 is completed. The liquid inlet 3 of this embodiment is connected to the pipeline to be installed, and the liquid outlet 9 can be used to connect to an external return pipe or recovery pipe. Under normal conditions, the plug ball 13 blocks the pressure relief port 7. When the internal pressure is too high, the plug ball 13 will be pushed back, and the liquid flow enters the bottom groove 8 and is discharged from the liquid outlet 9 through the liquid flow channel formed by the spiral groove 6 to achieve pressure relief.

[0020] Pressure relief is achieved by flushing open the plug ball 13, and the plug ball 13 will retract into the transverse hole 10 to avoid being impacted when it is flushed open. Moreover, the displacement of the plug ball 13 does not exceed its radius value, realizing rapid avoidance and preventing continuous high-pressure impact. At the same time, the liquid flow coming out of the pressure relief port 7 is guided to the liquid outlet 9 through the liquid flow channel formed by the spiral groove 6, preventing its backflow and backwashing, providing protection for the pressure relief component, maintaining long-term working performance, improving service life, and being more durable.

[0021] Obviously, the above embodiments of the present invention are only examples for explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A durable pressure relief valve, characterized in that: The invention comprises a connecting seat and a pressure relief head (1), wherein a liquid flow cavity (2) is provided in the connecting seat and a liquid inlet (3) is provided at the bottom thereof, wherein the connecting seat comprises a base (4) and a top seat (5), wherein the top seat (5) is fixed on the top of the base (4) and is columnar, wherein a spiral groove (6) is provided around the outer wall of the top seat (5), wherein the spiral groove (6) is connected to the liquid flow cavity (2) via a pressure relief port (7); wherein the pressure relief head (1) is provided with a bottom groove (8) and a liquid outlet (9) which are connected to each other, wherein the top seat (5) penetrates into the bottom groove (8), wherein the top seat (5) is provided with a liquid outlet (9) which is connected to the bottom groove (8). The liquid outlet (9) is located above the bottom groove (8); the pressure relief head (1) is provided with a transverse hole (10) on the side of the bottom groove (8); a pressure relief assembly is installed in the transverse hole (10); the pressure relief assembly comprises a fastening block (11), a spring (12) and a blocking ball (13); the fastening block (11), the spring (12) and the blocking ball (13) are pressed against each other in sequence; the outer end of the blocking ball (13) penetrates into the bottom groove (8) and blocks the pressure relief outlet (7); and the blocking ball (13) can cooperate with the spiral groove (6) to form a slide rail.

2. A durable pressure relief valve according to claim 1, characterized in that: The base (4) is provided with an annular wall (14) at the top, the top seat (5) is coaxially located on the inner side of the annular wall (14), the annular wall (14) is provided with a positioning hole (15) coaxial with the pressure relief port (7), and the positioning hole (15) is provided with a positioning bolt (16) for being threadedly connected to the transverse hole (10).

3. A durable pressure relief valve according to claim 1, characterized in that: The inner end of the transverse hole (10) is provided with a limiting shoulder (17).

4. A durable pressure relief valve according to claim 1, characterized in that: At least two pressure relief ports (7) are provided.

5. A durable pressure relief valve according to claim 1, characterized in that: A funnel-shaped filter cover (18) is provided in the liquid flow chamber (2), and the filter cover (18) is threadedly connected in the base (4).

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