Nitrogen purging device for preventing safety valve from being blocked

Abstract

The nitrogen purging device for preventing the safety valve from being blocked comprises a valve body, a valve cover is movably installed at the top end of the valve body, a discharging port is formed in one side of the valve body, an air blowing pipe is fixedly installed on the other side of the valve body, an air blowing valve is arranged at the outer end of the air blowing pipe, a feeding port is formed in the bottom end of the valve body, and a discharging port is formed in the other side of the valve body. And the air blowing pipe movably penetrates through the inner wall of the feeding opening and extends into the feeding opening, and a blocking door is movably installed at the position, close to the air blowing pipe, of the surface of the inner wall of the feeding opening. Through the cooperation of the air blowing valve and the air blowing pipe, after the device is used for a long time, the situation that a pipeline is blocked due to the fact that residual compounds in the feeding port sublimate to be in a solid state is avoided, at the moment, nitrogen can be conveyed into the air blowing pipe through the air blowing valve and is conveyed into the feeding port through the air blowing pipe, and the nitrogen is conveyed into the feeding port through the air blowing pipe. Therefore, the inner wall of the feeding port is periodically purged through nitrogen, and pipeline blockage caused by condensation and aggregation of compounds is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a nitrogen purge device for preventing safety valves from being blocked. Background Art

[0002] Safety valves are special valves whose opening and closing parts are normally closed under external forces. When the pressure of the medium in the equipment or pipeline exceeds the specified value, the medium is discharged to the outside of the system to prevent the pressure in the pipeline or equipment from exceeding the specified value. Safety valves are automatic valves, mainly used in boilers, pressure vessels and pipelines. They control the pressure to not exceed the specified value and play an important role in protecting personal safety and equipment operation. Note: Safety valves must undergo pressure testing before use;

[0003] During the use of the safety valve, the feed position of the safety valve is often blocked due to the sublimation and condensation of the feed compound material into a solid state. As a result, the safety valve may fail to trip normally when the pressure is too high due to pipeline blockage.

[0004] When the existing safety valve is in use, compounds are easily condensed at the feed position, affecting the normal use of the safety valve, and compounds are easily attached to the inside of the valve body, affecting the feeding and discharging efficiency of the safety valve; therefore, it does not meet the existing needs. In this regard, we propose a nitrogen purge device to prevent safety valve blockage. Utility Model Content

[0005] The purpose of the present utility model is to provide a nitrogen purge device for preventing blockage of a safety valve, so as to solve the problems proposed in the above-mentioned background art, such as the condensation of compounds at the feed position of the safety valve during use, thereby affecting the normal use of the safety valve, and the adhesion of compounds inside the valve body, thereby affecting the feeding and discharging efficiency of the safety valve.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a nitrogen purge device for preventing a safety valve from being blocked, comprising a valve body, a valve cover movably mounted on the top of the valve body, a discharge port provided on one side of the valve body, a blow pipe fixedly mounted on the other side of the valve body, a blow valve provided on the outer end of the blow pipe, a feed port provided on the bottom end of the valve body, the blow pipe movably passing through the inner wall of the feed port and extending to the interior of the feed port, a blocking door movably mounted on the inner wall surface of the feed port near the blow pipe.

[0007] Preferably, two connecting blocks are fixedly installed on the inner wall of the feed port, and a rotating shaft platform is fixedly installed on the top of the blocking door. The two sides of the rotating shaft platform are rotatably connected to the two connecting blocks through a rotating shaft, and torsion springs are movably installed at both ends of the rotating shaft.

[0008] Preferably, a valve flap is movably installed at the top of the feed port, a fixed block is movably installed at the top of the valve flap, the top of the valve flap is movably stuck into the bottom end of the fixed block, and a plurality of brushes are provided on the bottom surface of the valve flap, which fit the top surface of the feed port.

[0009] Preferably, a scraping rod is fixedly mounted on the outer surface of the fixed block, and two spiral rods are fixedly mounted on the bottom end of the scraping rod, and both the scraping rod and the spiral rod are in contact with the inner wall surface of the valve body.

[0010] Preferably, an adjusting nut is movably installed on the top of the valve cover, a transmission rod is movably installed inside the adjusting nut, a spring seat is movably installed on the bottom end of the adjusting nut, the bottom end of the transmission rod is fixedly connected to the top of the fixed block, a sealing ring is movably installed at the position where the valve body and the valve cover are connected, a spring seat is movably installed on the top of the sealing ring, and a compression spring is movably installed between the two spring seats.

[0011] Preferably, the outer end of the blowing valve is connected to a nitrogen storage tank.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model cooperates with the air blow valve and the air blow pipe. When the device is used for a long time, the inside of the feed port may be blocked due to the sublimation of residual compounds into solid state. At this time, nitrogen can be transported to the inside of the air blow pipe through the air blow valve and then sent into the inside of the feed port through the air blow pipe, so that the inner wall of the feed port is regularly purged by nitrogen to prevent the condensation and aggregation of compounds from causing blockage of the pipe.

[0014] 2. The utility model cooperates with the scraper rod and the spiral rod. When the device is in use, when the transmission rod drives the fixed block and the valve disc to rise and fall to open and close the flow state of the feed inlet and the discharge port, it will simultaneously drive the scraper rod and the spiral rod to rise and fall on the inner wall surface of the valve body, thereby scraping the inner wall of the valve body by the scraper rod and the spiral rod, so that the condensed substances such as compounds attached to the inner wall of the valve body are scraped off to prevent them from affecting the normal use of the device.

[0015] 3. The utility model is provided with a brush. When the device is in use, the transmission rod can be rotated to drive the fixed block and the valve disc to rotate, thereby driving the brush to rotate on the surface of the feed port, so that the brush cleans the opening position of the feed port, thereby avoiding the accumulation of compounds at the opening position of the feed port and affecting the opening size. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2It is a cross-sectional front view of the entire utility model;

[0018] Figure 3 It is a sectional side view of the entire utility model;

[0019] Figure 4 For this utility model Figure 3 Schematic diagram of the local structure of part A.

[0020] In the figure: 1. Valve body; 2. Valve cover; 3. Transmission rod; 4. Discharge port; 5. Air blow valve; 6. Air blow pipe; 7. Feed port; 8. Fixing block; 9. Valve disc; 10. Compression spring; 11. Spring seat; 12. Sealing ring; 13. Adjusting nut; 14. Scraper rod; 15. Screw rod; 16. Blocking door; 17. Rotating shaft platform; 18. Connecting block; 19. Torsion spring; 20. Brush. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] See also Figures 1 to 4 The utility model provides an embodiment: a nitrogen purge device for preventing safety valve blockage, comprising a valve body 1, a valve cover 2 movably mounted on the top of the valve body 1, a discharge port 4 being provided on one side of the valve body 1, a blow pipe 6 being fixedly mounted on the other side of the valve body 1, a blow valve 5 being provided on the outer end of the blow pipe 6, a feed port 7 being provided at the bottom end of the valve body 1, the blow pipe 6 movably passes through the inner wall of the feed port 7 and extends to the interior of the feed port 7, a blocking door 16 being movably mounted on the inner wall surface of the feed port 7 near the blow pipe 6.

[0023] Through the cooperation of the air blowing valve 5 and the air blowing pipe 6, when the device is used for a long time, the inside of the feed port 7 will be blocked due to the sublimation of the residual compound into a solid state. At this time, nitrogen can be transported to the inside of the air blowing pipe 6 through the air blowing valve 5 and then sent into the inside of the feed port 7 through the air blowing pipe 6, so that the inner wall of the feed port 7 is regularly purged with nitrogen to avoid condensation and aggregation of compounds and blockage of the pipeline.

[0024] Two connecting blocks 18 are fixedly installed on the inner wall of the feed port 7, and a rotating shaft platform 17 is fixedly installed on the top of the blocking door 16. The two sides of the rotating shaft platform 17 are rotatably connected to the two connecting blocks 18 through a rotating shaft, and torsion springs 19 are movably installed at both ends of the rotating shaft.

[0025] A valve flap 9 is movably installed at the top of the feed port 7, and a fixed block 8 is movably installed at the top of the valve flap 9. The top of the valve flap 9 is movably stuck into the bottom end of the fixed block 8. A plurality of brushes 20 are provided on the bottom surface of the valve flap 9, and the brushes 20 are in contact with the top surface of the feed port 7.

[0026] By setting the brush 20, when the device is in use, the transmission rod 3 can be rotated to drive the fixed block 8 and the valve flap 9 to rotate, thereby driving the brush 20 to rotate on the surface of the feed port 7, so that the brush 20 cleans the opening position of the feed port 7, thereby avoiding the accumulation of compounds at the opening position of the feed port 7 and affecting the opening size.

[0027] A scraping rod 14 is fixedly mounted on the outer surface of the fixed block 8 , and two spiral rods 15 are fixedly mounted on the bottom end of the scraping rod 14 . Both the scraping rod 14 and the spiral rod 15 are in contact with the inner wall surface of the valve body 1 .

[0028] Through the cooperation of the scraping rod 14 and the spiral rod 15, when the device is in use, when the transmission rod 3 drives the fixed block 8 and the valve disc 9 to rise and fall to open and close the flow state of the feed port 7 and the discharge port 4, the scraping rod 14 and the spiral rod 15 will be driven to rise and fall on the inner wall surface of the valve body 1 at the same time, so that the scraping rod 14 and the spiral rod 15 can scrape the inner wall of the valve body 1, so that the condensed substances such as compounds attached to the inner wall of the valve body 1 are scraped off to prevent them from affecting the normal use of the device.

[0029] An adjusting nut 13 is movably mounted on the top of the valve cover 2, a transmission rod 3 is movably mounted inside the adjusting nut 13, a spring seat 11 is movably mounted on the bottom end of the adjusting nut 13, the bottom end of the transmission rod 3 is fixedly connected to the top of the fixed block 8, a sealing ring 12 is movably mounted on the position where the valve body 1 and the valve cover 2 are connected, a spring seat 11 is movably mounted on the top of the sealing ring 12, and a compression spring 10 is movably mounted between the two spring seats 11.

[0030] The outer end of the air blowing valve 5 is connected to a nitrogen storage tank.

[0031] When the nitrogen purge device for preventing the blockage of the safety valve is in use, after a long period of use, the inside of the feed port 7 may be blocked due to the sublimation of residual compounds into a solid state. At this time, nitrogen can be delivered to the inside of the blow pipe 6 through the blow valve 5 and then sent into the inside of the feed port 7 through the blow pipe 6, so that the inner wall of the feed port 7 is regularly purged with nitrogen to prevent the condensation and aggregation of compounds from causing blockage of the pipeline.

[0032] When the transmission rod 3 drives the fixed block 8 and the valve disc 9 to rise and fall to open and close the flow state of the feed port 7 and the discharge port 4, it will simultaneously drive the scraping rod 14 and the spiral rod 15 to rise and fall on the inner wall surface of the valve body 1, so that the scraping rod 14 and the spiral rod 15 can scrape the inner wall of the valve body 1, so that the compounds and other condensed substances attached to the inner wall of the valve body 1 are scraped off to avoid affecting the normal use of the device; when the device is in use, the transmission rod 3 can be rotated to drive the fixed block 8 and the valve disc 9 to rotate, and then drive the brush 20 to rotate on the surface of the feed port 7, so that the brush 20 can clean the opening position of the feed port 7, thereby avoiding the accumulation of compounds at the opening position of the feed port 7 and affecting the opening size.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A nitrogen purge device for preventing a safety valve from being blocked, comprising a valve body (1), characterized in that: A valve cover (2) is movably mounted on the top of the valve body (1), a discharge port (4) is provided on one side of the valve body (1), a blow pipe (6) is fixedly mounted on the other side of the valve body (1), a blow valve (5) is provided at the outer end of the blow pipe (6), a feed port (7) is provided at the bottom end of the valve body (1), the blow pipe (6) movably penetrates the inner wall of the feed port (7) and extends to the interior of the feed port (7), and a blocking door (16) is movably mounted on the inner wall surface of the feed port (7) near the blow pipe (6).

2. A nitrogen purge device for preventing safety valve blockage according to claim 1, characterized in that: Two connecting blocks (18) are fixedly installed on the inner wall of the feed port (7), and a rotating shaft platform (17) is fixedly installed on the top of the blocking door (16). The two sides of the rotating shaft platform (17) are rotatably connected to the two connecting blocks (18) through a rotating shaft, and torsion springs (19) are movably installed at both ends of the rotating shaft.

3. The nitrogen purge device for preventing safety valve blockage according to claim 1, characterized in that: A valve flap (9) is movably mounted on the top of the feed port (7), a fixed block (8) is movably mounted on the top of the valve flap (9), the top of the valve flap (9) is movably snapped into the bottom of the fixed block (8), a plurality of brushes (20) are provided on the bottom surface of the valve flap (9), and the brushes (20) are in contact with the top surface of the feed port (7).

4. A nitrogen purge device for preventing safety valve blockage according to claim 3, characterized in that: A scraping rod (14) is fixedly mounted on the outer surface of the fixed block (8), and two spiral rods (15) are fixedly mounted on the bottom end of the scraping rod (14). Both the scraping rod (14) and the spiral rod (15) are in contact with the inner wall surface of the valve body (1).

5. The nitrogen purge device for preventing safety valve blockage according to claim 1, characterized in that: An adjusting nut (13) is movably mounted on the top of the valve cover (2), a transmission rod (3) is movably mounted inside the adjusting nut (13), a spring seat (11) is movably mounted on the bottom of the adjusting nut (13), the bottom end of the transmission rod (3) is fixedly connected to the top of the fixed block (8), a sealing ring (12) is movably mounted at the position where the valve body (1) and the valve cover (2) are connected, a spring seat (11) is movably mounted on the top of the sealing ring (12), and a compression spring (10) is movably mounted between the two spring seats (11).

6. The nitrogen purge device for preventing safety valve blockage according to claim 1, characterized in that: The outer end of the air blowing valve (5) is connected to a nitrogen storage tank.

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