Auxiliary priming poppet valve

Abstract

This utility model provides an auxiliary-start rupture needle valve, comprising a valve body, a valve disc, a valve cover, a valve stem, a rupture needle, and an auxiliary starting mechanism. The valve body has a valve cavity inside, and is provided with a pressure relief inlet, a pressure relief outlet, and a valve port communicating with the valve cavity. The valve disc is disposed within the valve cavity, and the valve cover is connected to the valve port. The top of the valve cover has an upwardly extending support member, and the middle of the valve cover has a through hole communicating with the valve cavity. The rupture needle and valve stem are disposed from top to bottom within the support member. The upper end of the rupture needle abuts against the inner top wall of the support member, and the lower end of the rupture needle abuts against the upper end of the valve stem. The lower end of the valve stem passes through the through hole and connects to the valve disc. In the initial state, the valve disc disconnects the pressure relief inlet from the pressure relief outlet. The auxiliary starting mechanism is connected to one side of the support member. When the pressure of the medium in the pipeline exceeds a specified value, it agitates the rupture needle and coordinates with the medium pressure to ensure that the rupture needle breaks, thereby stably completing the pressure relief operation.

Description

Technical Field

[0001] This utility model relates to the field of safety valve technology, specifically to an auxiliary start-up burst needle valve. Background Technology

[0002] A safety valve is a special valve whose opening and closing element is normally closed under external force. When the pressure of the medium in the equipment or pipeline rises above a specified value, it discharges the medium to the outside of the system to prevent the pressure of the medium in the pipeline or equipment from exceeding the specified value. Safety valves belong to the category of automatic valves and are mainly used on boilers, pressure vessels, and pipelines to control the pressure to not exceed the specified value, playing an important role in protecting personal safety and equipment operation.

[0003] There are many types of safety valves, the most common being the spring-loaded safety valve. However, this requires a large-mass spring, and the spring's elasticity decreases with prolonged use, necessitating frequent calibration. Therefore, a needle-type safety valve has emerged, using a rupture needle as its core component. When pressure increases, the rupture needle becomes unstable and loses its supporting force, causing the valve to open under the force of the medium. Because testing the rupture needle is destructive, it cannot be calibrated like the spring in a spring-loaded safety valve. In practical applications, this can lead to situations where the medium pressure in the pipeline exceeds a specified value, and the rupture needle fails to break due to the medium pressure alone. Therefore, additional reliability redundancy is needed for needle-type safety valves to ensure timely rupture of the rupture needle. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a burst needle valve that can assist in the activation of the burst needle breaking when the pressure of the medium in the pipeline rises above the specified value.

[0005] The technical solution of this utility model is to provide an auxiliary start-up burst needle valve with the following structure: The system includes a valve body, valve disc, valve cover, valve stem, rupture needle, and auxiliary starting mechanism. The valve body has an internal valve cavity with a pressure relief inlet, a pressure relief outlet, and a valve port communicating with the cavity. The valve disc is located within the valve cavity and connects or disconnects the pressure relief inlet and outlet. The valve cover is connected to the valve port, with an upwardly extending support member at its top and a through hole communicating with the valve cavity in its center. The rupture needle and valve stem are arranged from top to bottom within the support member. The upper end of the rupture needle abuts against the inner top wall of the support member, and the lower end of the rupture needle abuts against the upper end of the valve stem. The lower end of the valve stem passes through the through hole and connects to the valve disc. Initially, the valve disc disconnects the pressure relief inlet from the pressure relief outlet. The auxiliary starting mechanism is connected to one side of the support member and agitates the rupture needle when the pressure of the medium in the pipeline exceeds a specified value.

[0006] With the above structure, the auxiliary start-up burst needle valve of this utility model has the following advantages compared with the prior art: The medium in the pipeline exerts an upward thrust on the valve disc through the pressure relief inlet and squeezes the rupture needle through the valve stem. When the pressure of the medium in the pipeline exceeds the specified value, the auxiliary starting mechanism disturbs the rupture needle in coordination with the medium pressure to ensure that the rupture needle can break. At this time, the valve disc and valve stem lose the support of the rupture needle and will move upward under the thrust of the medium, thereby connecting the pressure relief inlet and the pressure relief outlet, and thus stably completing the pressure relief work.

[0007] Preferably, the pressure relief inlet and valve port are respectively located at the upper and lower ends of the valve body, and the pressure relief outlet is located on one side of the valve body; the lower end of the outer peripheral wall of the valve disc is provided with an annular groove, and a sealing ring is connected in the annular groove. In the initial state, the valve disc is located in the pressure relief inlet, and the sealing ring is sealed and fitted with the inner wall of the pressure relief inlet. This ensures that the pressure relief inlet is sealed and closed in the initial state of the rupture needle valve.

[0008] Preferably, the through-hole is filled with sealing packing, which is used to seal the valve stem with the through-hole. When the pressure of the medium in the pipeline exceeds a specified value, the pressure relief inlet is opened, and the medium flowing into the valve cavity will only flow out from the pressure relief outlet and will not overflow from the through-hole of the valve cover.

[0009] Preferably, the rupture needle is fitted with a needle sleeve, which can be made of a flexible material. When the rupture needle breaks, the broken fragments can be prevented from flying away, thereby avoiding accidents.

[0010] Preferably, the top of the support member is an open end, and a pressure cap is connected to the open end, with the top of the rupture needle abutting against the inner end face of the pressure cap. The pressure cap is located on the top of the support member and can be opened by removing the screws that mate with it, thus facilitating maintenance of the internal critical component, the rupture needle, making the operation simple and convenient.

[0011] Preferably, the auxiliary starting mechanism includes a cylinder body, a cylinder head, a sealing ring, a piston, a push rod, and a spring; the cylinder body is cylindrical, the cylinder head is connected to the outer end opening of the cylinder body, the sealing ring is connected to the inner end opening of the cylinder body, and the piston, push rod, and spring are disposed inside the cylinder body; the push rod is coaxially connected to the piston, and one end of the push rod passes through the sealing ring and extends outside the cylinder body; the spring is sleeved on the push rod, and one end of the spring abuts against the piston, and the other end abuts against the cylinder head; an air inlet is provided on the side of the cylinder body away from the spring, which communicates with its inner cavity, and the air inlet is connected to an external air source for inflating the cylinder body.

[0012] When an external air source inflates the air inlet, it pushes the piston to compress the spring, causing the push rod to move away from the rupture needle. Combined with the on-site pressure control instrument, when the medium pressure in the pipeline exceeds the specified value, the compressed air in the cylinder is released. At this time, the spring pushes the piston and push rod to move towards the rupture needle. The end of the push rod pushes the middle of the rupture needle, causing it to be disturbed. Combined with the medium pressure, the rupture needle can be easily squeezed and broken, thus completing the pressure relief.

[0013] Preferably, the cylinder body has a vent port on the side near the spring, which communicates with the inner cavity of the vent port. Venting occurs when the piston moves to the right side of the vent port. The vent port prevents damage to the spring due to excessive pressure within the cylinder body.

[0014] Preferably, the auxiliary starting mechanism also includes a protective plate, which is placed between the push rod and the support member to prevent the push rod from contacting the rupture needle inside the support member. During valve maintenance, the external air supply needs to be cut off, and the auxiliary starting mechanism isolated to protect the operator's safety. Specifically, sufficient compressed air is first injected into the inflation port to compress the piston against the spring and push the push rod to the right. Then, the protective plate is placed between the two support arms of the support member and secured with a rib. Next, the air supply is vented from the inflation port, and under the spring's force, the push rod moves to the left and abuts against the protective plate, allowing for safe replacement of the rupture needle. After the rupture needle replacement is completed, the external air supply is injected into the inflation port, pushing the push rod to the right, at which point the protective plate automatically detaches. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a longitudinal half-sectional view of the present invention.

[0017] Figure 3 This is a cross-sectional view of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Valve body; 11. Valve cavity; 12. Pressure relief inlet; 13. Pressure relief outlet; 14. Valve port; 2. Valve disc; 21. Sealing ring; 3. Valve cover; 31. Support component; 32. Through hole; 321. Sealing packing; 33. Gland; 4. Valve stem; 5. Bursting needle; 51. Needle sleeve; 6. Auxiliary starting mechanism; 61. Cylinder body; 62. Cylinder head; 63. Sealing ring; 64. Piston; 65. Push rod; 66. Spring; 67. Inflation port; 68. Vent port; 69. Protective plate. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. At the same time, the terms "first", "second", etc., are only used to distinguish the names of various components and do not have a primary or secondary relationship. Therefore, they should not be construed as limitations on this utility model.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses an auxiliary starting burst needle valve, which includes a valve body 1, a valve disc 2, a valve cover 3, a valve stem 4, a burst needle 5, and an auxiliary starting mechanism 6.

[0022] The valve body 1 has a valve cavity 11 inside. The valve body 1 is provided with a pressure relief inlet 12, a pressure relief outlet 13 and a valve port 14 communicating with the valve cavity 11. The pressure relief inlet 12 and the valve port 14 are respectively located at the upper and lower ends of the valve body 1, and the pressure relief outlet 13 is located on one side of the valve body 1.

[0023] The valve disc 2 is located inside the valve cavity 11 and is used to connect or disconnect the pressure relief inlet 12 and the pressure relief outlet 13. The lower end of the outer peripheral wall of the valve disc 2 is provided with an annular groove, and a sealing ring 21 is connected in the annular groove. In the initial state, the valve disc 2 is located inside the pressure relief inlet 12, and the sealing ring 21 is sealed and matched with the inner wall of the pressure relief inlet 12, which can ensure that the pressure relief inlet 12 is sealed and closed.

[0024] The valve cover 3 is connected to the valve port 14. The top of the valve cover 3 is provided with an upwardly extending support member 31, and the middle of the valve cover 3 is provided with a through hole 32 communicating with the valve cavity 11.

[0025] The rupture needle 5 and valve stem 4 are arranged from top to bottom inside the support member 31. The upper end of the rupture needle 5 abuts against the top wall inside the support member 31, and the lower end of the rupture needle 5 abuts against the upper end of the valve stem 4. The lower end of the valve stem 4 passes through the through hole 32 and is connected to the valve disc 2. In the initial state, the valve disc 2 disconnects the connection between the pressure relief inlet 12 and the pressure relief outlet 13.

[0026] The auxiliary starting mechanism 6 is connected to one side of the support member 31. When the pressure of the medium in the pipeline exceeds the specified value, it disturbs the bursting needle 5.

[0027] In this invention, the medium in the pipeline exerts an upward thrust on the valve disc 2 through the pressure relief inlet 12, and squeezes the rupture needle 5 through the valve stem 4. When the pressure of the medium in the pipeline exceeds the specified value, the auxiliary starting mechanism 6 disturbs the rupture needle 5, and at the same time cooperates with the medium pressure to ensure that the rupture needle 5 can break. At this time, the valve disc 2 and the valve stem 4 lose the support of the rupture needle 5 and will move upward under the thrust of the medium, thereby connecting the pressure relief inlet 12 with the pressure relief outlet 13, and thus stably completing the pressure relief work.

[0028] The through hole 32 of the valve cover 3 is filled with sealing packing 321. The sealing packing 321 can maintain the sealing fit between the valve stem 4 and the through hole 32 without affecting the movement of the valve stem 4. When the pressure of the medium in the pipeline exceeds the specified value, the pressure relief inlet 12 is opened, and the medium flowing into the valve cavity 11 will only flow out from the pressure relief outlet 13, and will not overflow from the gap of the through hole 32 on the valve cover 3 at the valve port 14.

[0029] Since the blasting needle 5 may break into fragments, in order to prevent the fragments of the blasting needle 5 from causing accidents, this utility model provides a needle sleeve 51 on the blasting needle 5. The needle sleeve 51 can be made of flexible rubber and can play a protective role when the blasting needle 5 breaks, preventing the fragments from flying and injuring people.

[0030] The support member 31 consists of two symmetrical support arms, the upper ends of which are bent towards each other and connected. The top of the support member 31 is set as an open end, and a pressure cap 33 is connected to the open end by screws. The top of the rupture needle 5 abuts against the inner end face of the pressure cap 33. The pressure cap 33 is set on the top of the support member 31. It can be opened by removing the screws that mate with it, thus facilitating maintenance of the internal critical component, the rupture needle 5. The operation is simple and convenient.

[0031] like Figure 2 and Figure 3 As shown, the auxiliary starting mechanism 6 includes a cylinder body 61, a cylinder head 62, a sealing ring 63, a piston 64, a push rod 65, and a spring 66. The cylinder body 61 is cylindrical, the cylinder head 62 is connected to the outer end opening of the cylinder body 61, the sealing ring 63 is connected to the inner end opening of the cylinder body 61, and the piston 64, push rod 65, and spring 66 are disposed inside the cylinder body 61. The push rod 65 is coaxially connected to the piston 64, and one end of the push rod 65 passes through the sealing ring 63 and extends to the outside of the cylinder body 61. The spring 66 is sleeved on the push rod 65, and one end of the spring 66 abuts against the piston 64, and the other end abuts against the cylinder head 62. An air inlet 67 is provided on the side of the cylinder body 61 away from the spring 66, which is connected to its inner cavity. The air inlet 67 is connected to an external air source for inflating the cylinder body 61.

[0032] When an external air source inflates the air inlet 67, it pushes the piston 64 to compress the spring 66, causing the push rod 65 to move away from the rupture needle 5. Combined with the on-site pressure control instrument, when the medium pressure in the pipeline exceeds the specified value, the solenoid valve on the corresponding pipeline is opened to release the compressed air in the cylinder 61. At this time, the spring 66 pushes the piston 64 and the push rod 65 to move towards the rupture needle 5. The end of the push rod 65 pushes against the middle of the rupture needle 5, causing it to be disturbed. Combined with the medium pressure, the rupture needle 5 can be easily squeezed and broken, thereby completing the pressure relief.

[0033] A vent 68 is provided on the side of the cylinder 61 near the spring 66, communicating with its inner cavity. Venting occurs when the piston 64 moves to the right side of the vent 68. The vent 68 is provided to prevent damage to the spring 66 due to excessive pressure inside the cylinder 61.

[0034] The auxiliary starting mechanism 6 also includes a protective plate 69, which is placed between the push rod 65 and the support member 31 to prevent the push rod 65 from contacting the rupture needle 5 inside the support member 31. During valve maintenance, the external air supply needs to be cut off to isolate the auxiliary starting mechanism 6 and protect the operator's safety. Specifically, sufficient compressed air is first injected into the inflation port 67 to compress the spring 66 with the piston 64, pushing the push rod 65 to the right. Then, the protective plate 69 is placed between the two support arms of the support member 31 and secured by the ribs on the support arms. Next, the inflation port 67 is vented, and under the elastic force of the spring 66, the push rod 65 moves to the left and abuts against the protective plate 69. At this point, the rupture needle 5 can be safely replaced. After the rupture needle 5 is replaced, the external air supply is injected into the inflation port 67, pushing the push rod 65 to the right. At this point, the protective plate 69 can automatically detach.

[0035] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An assisted priming blasting needle valve, characterized by: The valve body (1) includes a valve disc (2), a valve cover (3), a valve stem (4), a rupture needle (5), and an auxiliary starting mechanism (6). The valve body (1) has a valve cavity (11) inside, and the valve body (1) is provided with a pressure relief inlet (12), a pressure relief outlet (13), and a valve port (14) communicating with the valve cavity (11). The valve disc (2) is disposed in the valve cavity (11) to connect or disconnect the pressure relief inlet (12) and the pressure relief outlet (13). The valve cover (3) is connected to the valve port (14), and the top of the valve cover (3) is provided with an upwardly extending support member (31), and the middle part of the valve cover (3) is provided with a connection to the valve cavity. (11) A through hole (32) is connected; the rupture needle (5) and valve stem (4) are arranged from top to bottom in the support member (31). The upper end of the rupture needle (5) abuts against the inner top wall of the support member (31), and the lower end of the rupture needle (5) abuts against the upper end of the valve stem (4). The lower end of the valve stem (4) passes through the through hole (32) and is connected to the valve disc (2). In the initial state, the valve disc (2) disconnects the pressure relief inlet (12) from the pressure relief outlet (13). The auxiliary starting mechanism (6) is connected to one side of the support member (31). When the pressure of the medium in the pipeline exceeds the specified value, it disturbs the rupture needle (5).

2. The assisted priming blasting needle valve of claim 1, wherein: The pressure relief inlet (12) and valve port (14) are respectively located at the upper and lower ends of the valve body (1), and the pressure relief outlet (13) is located on one side of the valve body (1); the lower end of the outer peripheral wall of the valve disc (2) is provided with an annular groove, and a sealing ring (21) is connected in the annular groove. In the initial state, the valve disc (2) is located in the pressure relief inlet (12), and the sealing ring (21) is sealed to the inner wall of the pressure relief inlet (12).

3. The assisted priming blasting needle valve of claim 2, wherein: The through hole (32) is filled with sealing packing (321), which is used to seal the valve stem (4) with the through hole (32).

4. The assisted priming blasting needle valve of claim 1, wherein: The rupture needle (5) is fitted with a needle sleeve (51).

5. The assisted priming blasting needle valve of claim 4, wherein: The top of the support member (31) is an open end, and a pressure cap (33) is connected to the open end. The top of the rupture needle (5) abuts against the inner end face of the pressure cap (33).

6. The assisted priming blasting needle valve of claim 5, wherein: The auxiliary starting mechanism (6) includes a cylinder body (61), a cylinder head (62), a sealing ring (63), a piston (64), a push rod (65), and a spring (66); the cylinder body (61) is cylindrical, the cylinder head (62) is connected to the outer end opening of the cylinder body (61), the sealing ring (63) is connected to the inner end opening of the cylinder body (61), and the piston (64), push rod (65), and spring (66) are disposed inside the cylinder body (61); the push rod (65) and... The piston (64) is coaxially connected, and one end of the push rod (65) passes through the sealing ring (63) and extends to the outside of the cylinder (61). The spring (66) is sleeved on the push rod (65), and one end of the spring (66) abuts against the piston (64), and the other end abuts against the cylinder head (62). The cylinder (61) is provided with an air inlet (67) on the side away from the spring (66) that communicates with its inner cavity. The air inlet (67) is connected to an external air source and is used to inflate the cylinder (61).

7. The assisted priming blasting needle valve of claim 6, wherein: The cylinder (61) has a vent (68) connected to its inner cavity on the side near the spring (66), and venting occurs when the piston (64) moves to the right side of the vent (68).

8. The assisted priming blasting needle valve of claim 6, wherein: The auxiliary starting mechanism (6) also includes a protective plate (69), which is placed between the top rod (65) and the support member (31) to prevent the top rod (65) from contacting the rupture needle (5) inside the support member (31).

Images