A pin-type pressure vessel safety release device

Abstract

A pin-type pressure vessel safety relief device comprises a valve body and a valve cover, wherein a first piston is slidably arranged in the valve body, the first piston is coaxially fixedly connected to a valve stem, one end of the valve stem is coaxially connected to a bending needle after extending from the valve cover, the valve cover is fixedly connected to a mounting cylinder, the end of the mounting cylinder away from the valve cover is rotatably connected to a turntable, the bending needle is detachably connected to the turntable, the turntable is fixedly connected to an externally threaded sleeve, and the externally threaded sleeve extends into the mounting cylinder, the externally threaded sleeve is cooperatively connected to an internally threaded sleeve, the internally threaded sleeve is fixedly connected to a plurality of sliders, a slide groove for accommodating the slider is provided on the inner wall of the mounting cylinder, and the slide groove extends along the axial direction of the mounting cylinder, the valve stem is fixedly connected to a push plate after extending from the valve cover, the push plate is located in the mounting cylinder, and the push plate is located between the valve cover and the internally threaded sleeve. The present invention provides a pin-type pressure vessel safety relief device, which can quickly replace a new bending needle without interrupting the operation of the production system.

Description

Technical Field

[0001] The invention relates to the field of pressure vessels, in particular to a pin-type pressure vessel safety release device. Background Art

[0002] Pressure vessels refer to closed equipment that contains gas or liquid and bears a certain pressure. Pressure vessels are widely used and play an important role in many sectors such as industry, civil industry, military industry, and many fields of scientific research. They are most commonly used in the chemical industry and petrochemical industry. In the chemical and petrochemical fields, pressure vessels are mainly used in process such as heat transfer, mass transfer, reaction, and storage and transportation of pressurized gas or liquefied gas. They are also widely used in other industrial and civil fields, such as air compressors.

[0003] In order to ensure the safety of the pressure vessel, it is necessary to configure a relief device for the pressure vessel. When the pressure of the medium inside the pressure vessel is too high, part of the medium can be quickly discharged through the relief device, thereby reducing the internal pressure of the pressure vessel. The pin-type relief device is a commonly used relief device. On the basis of the structure of the traditional safety valve, the spring is replaced with a bending needle, and the bending needle is used to support the valve stem. When the pressure of the medium in the pressure vessel is too high, the medium generates thrust on the valve stem, and the thrust is transmitted to the bending needle. When the maximum load of the bending needle is exceeded, the bending needle bends and deforms, so that the valve stem loses support, and then the medium can push the valve stem out of the pressure vessel to complete the discharge. The bursting needle valve has excellent safety performance, such as high stability, high precision, corrosion resistance, advanced sealing, anti-back pressure design, etc., but there are also certain shortcomings. The main one is that the existing pin-type relief device cannot close automatically. After opening, the entire production system must be shut down, and then the bending needle must be replaced, which will result in a large economic loss. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a pin-type pressure vessel safety relief device, which can quickly replace a new bending pin without interrupting the operation of the production system, thereby reducing economic losses.

[0005] In order to achieve the above-mentioned purpose, the specific scheme adopted by the present invention is: a needle-pin type pressure vessel safety relief device, including a valve body and a valve cover, a first piston is slidably arranged in the valve body, the first piston is coaxially fixedly connected with a valve stem, one end of the valve stem is coaxially connected with a bending needle after extending from the valve cover, the valve cover is fixedly connected with a mounting cylinder, the mounting cylinder is rotatably connected with a turntable at one end away from the valve cover, the bending needle is detachably connected to the turntable, the turntable is fixedly connected with an externally threaded sleeve, and the externally threaded sleeve extends into the mounting cylinder, the externally threaded sleeve is cooperatively connected with an internally threaded sleeve, the internally threaded sleeve is fixedly connected with a plurality of sliding blocks, a sliding groove for accommodating the sliding block is opened on the inner wall of the mounting cylinder, and the sliding groove extends along the axial direction of the mounting cylinder, the valve stem is fixedly connected with a push plate after extending from the valve cover, the push plate is located in the mounting cylinder, and the push plate is located between the valve cover and the internally threaded sleeve.

[0006] As a further optimization of the above-mentioned pin-type pressure vessel safety relief device: the end of the mounting tube away from the valve cover is fixedly connected with a first annular clamping plate, the first clamping plate is fixedly connected with a cylindrical baffle, the baffle is fixedly connected with a second annular clamping plate, and the turntable is rotatably arranged between the first clamping plate and the second clamping plate.

[0007] As a further optimization of the above-mentioned needle-pin type pressure vessel safety relief device: both ends of the bending needle are detachably connected to a mounting seat, one of the mounting seats is fixedly connected to the valve stem, and the other mounting seat is fixedly connected to a positioning plate; a first mounting hole and a second mounting hole are opened in the middle of the turntable, the first mounting hole and the second mounting hole are connected to each other, the first mounting hole passes through the side of the turntable facing away from the valve cover, and the second mounting hole passes through the side of the turntable close to the valve cover, the first mounting hole is also connected to a plug hole, the extension direction of the plug hole is parallel to the turntable and both ends pass through the side wall of the turntable, and the plug hole divides the first mounting hole into two parts along the axial direction; a top plate is detachably arranged in the plug hole, the positioning plate is arranged in the first mounting hole, and the positioning plate is located on the side of the top plate facing the valve cover, and the mounting seat fixedly connected to the positioning plate is arranged in the second mounting hole.

[0008] As a further optimization of the above-mentioned pin-type pressure vessel safety release device: the turntable is fixedly connected to a guide cylinder, the guide cylinder extends into the interior of the mounting cylinder, the guide cylinder is connected to the second mounting hole, and a mounting seat fixedly connected to the positioning plate extends into the guide cylinder.

[0009] As a further optimization of the above-mentioned pin-type pressure vessel safety relief device: a plurality of handles are fixedly connected to the side of the turntable facing away from the valve cover.

[0010] As a further optimization of the above-mentioned pin-type pressure vessel safety relief device: the valve cover is fixedly connected with a protrusion, and the protrusion is conical, the protrusion extends into the valve body, the valve stem passes through the protrusion, and a sealing ring is arranged between the valve stem and the protrusion.

[0011] As a further optimization of the above-mentioned pin-type pressure vessel safety relief device: the valve stem is fixedly connected to a second piston, the second piston is sleeved on the valve stem and is parallel to the first piston, the second piston is fixedly connected to a sealing block on the side facing away from the first piston, and the sealing block is provided with a conical groove matching the raised portion.

[0012] Beneficial effect: After the discharge is completed, the staff of the present invention can quickly replace the new flexion needle, thereby restoring the discharge device and allowing the pressure vessel to continue to operate. If handled in time, the operation of the production system can be uninterrupted, thereby reducing economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 It is a cross-sectional view of the turntable.

[0015] Description of the drawings: 1-valve body, 2-first piston, 3-valve stem, 4-second piston, 5-sealing block, 6-conical groove, 7-protrusion, 8-sealing ring, 9-valve cover, 10-mounting cylinder, 11-slide groove, 12-slider, 13-first clamping plate, 14-baffle, 15-second clamping plate, 16-turntable, 17-handle, 18-first mounting hole, 19-top plate, 20-positioning plate, 21-mounting seat, 22-guide cylinder, 23-bending needle, 24-inner threaded sleeve, 25-external threaded sleeve, 26-push plate, 27-jack, 28-second mounting hole. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1 and 2A pin-type pressure vessel safety relief device comprises a valve body 1 and a valve cover 9, wherein a first piston 2 is slidably arranged in the valve body 1, wherein the first piston 2 is coaxially fixedly connected to a valve stem 3, wherein one end of the valve stem 3 extends out of the valve cover 9 and is coaxially connected to a bending needle 23, wherein the valve cover 9 is fixedly connected to a mounting cylinder 10, wherein one end of the mounting cylinder 10 away from the valve cover 9 is rotatably connected to a turntable 16, wherein the bending needle 23 is detachably connected to the turntable 16, wherein the turntable 16 is fixedly connected to an externally threaded sleeve 25, and wherein the externally threaded sleeve 25 is fixedly connected to the turntable 16. The sleeve 25 extends into the mounting tube 10, and the externally threaded sleeve 25 is connected with the internally threaded sleeve 24, and the internally threaded sleeve 24 is fixedly connected with a plurality of sliders 12. A slide groove 11 for accommodating the sliders 12 is provided on the inner wall of the mounting tube 10, and the slide groove 11 extends along the axial direction of the mounting tube 10. After the valve stem 3 extends out from the valve cover 9, it is fixedly connected with a push plate 26, and the push plate 26 is located in the mounting tube 10, and the push plate 26 is located between the valve cover 9 and the internally threaded sleeve 24.

[0018] When in use, the externally threaded sleeve 25 is driven to rotate by rotating the turntable 16. Because the externally threaded sleeve 25 and the internally threaded sleeve 24 cooperate with each other, and the internally threaded sleeve 24 is restricted and cannot rotate by the cooperation of the slider 12 and the slide groove 11, the externally threaded sleeve 25 drives the internally threaded sleeve 24 to move axially during rotation, and then the internally threaded sleeve 24 pushes the push plate 26 to move toward the valve cover 9. During the movement of the push plate 26, the valve stem 3 is driven to move synchronously, and the valve stem 3 drives the first piston 2 to move synchronously until the first piston 2 closes the entrance of the valve body 1. Then, the flexion needle 23 is installed between the turntable 16 and the valve stem 3, and finally the turntable 16 is rotated in the opposite direction to reset the internally threaded sleeve 24. During the operation of the pressure vessel, when the pressure of the internal medium is too high, the medium generates thrust to the first piston 2 until the bending needle 23 is bent and deformed, and the valve stem 3 loses support. The medium can push the first piston 2 to move in the direction of the valve cover 9, and then open the valve body 1, so that the medium can flow into the valve body 1 to complete the discharge. After the discharge is completed, the staff needs to replace the new bending needle 23 and re-close the valve body 1. At this time, the bending needle 23 that has been bent and deformed can be removed first, and then the new bending needle 23 can be reinstalled. Because the valve stem 9 is pushed by the cooperation of the internal threaded sleeve 24 and the external threaded sleeve 25 during the installation process, there is no need to directly overcome the thrust of the medium on the valve stem 9. Therefore, the staff can more easily reset the valve stem 9 and complete the installation of the bending needle 23. If the processing is timely, the operation of the production system can be kept uninterrupted, thereby reducing economic losses.

[0019] The specific arrangement of the rotating disk 16 is as follows: an annular first clamping plate 13 is fixedly connected to one end of the mounting cylinder 10 away from the valve cover 9, a cylindrical baffle 14 is fixedly connected to the first clamping plate 13, a annular second clamping plate 15 is fixedly connected to the baffle 14, and the rotating disk 16 is rotatably arranged between the first clamping plate 13 and the second clamping plate 15. The first clamping plate 13 and the second clamping plate 15 cooperate to limit the rotating disk 16, because the thrust of the medium on the first piston 2 will be transmitted to the rotating disk 16 through the valve stem 3 and the bending needle 23, so by limiting the rotating disk 16, the movement of the rotating disk 16 can be avoided, thereby ensuring that the valve stem 3 and the bending needle 23 can fix the position of the first piston 2, thereby achieving the effect of closing the valve body 1.

[0020] The specific setting method of the flexion needle 23 is as follows: a mounting seat 21 is detachably connected to each of the two ends of the flexion needle 23, one of the mounting seats 21 is fixedly connected to the valve stem 3, and the other mounting seat 21 is fixedly connected to the positioning plate 20; a first mounting hole 18 and a second mounting hole 28 are opened in the middle of the turntable 16, and the first mounting hole 18 and the second mounting hole 28 are connected to each other, the first mounting hole 18 passes through the side of the turntable 16 facing away from the valve cover 9, and the second mounting hole 28 passes through the side of the turntable 16 close to the valve cover 9, and the first mounting hole 18 is also connected to the plug hole 27, the extension direction of the plug hole 27 is parallel to the turntable 16 and both ends pass through the side wall of the turntable 16, and the plug hole 27 divides the first mounting hole 18 into two parts along the axial direction; a top plate 19 is detachably arranged in the plug hole 27, the positioning plate 20 is arranged in the first mounting hole 18, and the positioning plate 20 is located on the side of the top plate 19 facing the valve cover 9, and the mounting seat 21 fixedly connected to the positioning plate 20 is arranged in the second mounting hole 28. When installing the flexion needle 23, firstly, the flexion needle 23 is passed through the rotary disk 16 and inserted into the mounting seat 21 fixedly connected to the valve stem 3, and then the positioning plate 20 is sent into the first mounting hole 18, and a mounting seat 21 connected to the positioning plate 20 is directed toward the valve cover 9, until the mounting seat 21 is inserted into the second mounting hole 28 and the positioning plate 20 is located between the insertion hole 27 and the second mounting hole 28, and finally the top plate 19 is inserted into the insertion hole 27. After the top plate 19 is installed, the rotary disk 16 can be reversed to reset the internal threaded sleeve 24, and the thrust of the medium on the first piston 2 is transmitted to the rotary disk 16 through the valve stem 3, the flexion needle 23, the positioning plate 20 and the top plate 19 in turn. The use of the plug-in top plate 19 to support and fix the flexion needle 23 is simple and quick to operate, and can effectively shorten the maintenance time, so that the discharge device can be restored to a normal operating state without interrupting the operation of the production system.

[0021] In order to further facilitate the installation of the flexion needle 23, the rotating disk 16 is fixedly connected with a guide cylinder 22, which extends into the interior of the installation cylinder 10, is communicated with the second installation hole 28, and a mounting seat 21 fixedly connected to the positioning plate 20 extends into the guide cylinder 22. After the flexion needle 23 enters the installation cylinder 10, its upper end can be limited by the guide cylinder 22, thereby avoiding the situation of tipping over, ensuring that the flexion needle 23 can be smoothly connected with the mounting seat 21 during the installation process of the positioning plate 20 and the mounting seat 21.

[0022] In order to facilitate the rotation of the turntable 16, a plurality of handles 17 are fixedly connected to the side of the turntable 16 facing away from the valve cover 9. In other embodiments of the present invention, the handles 17 can also be connected to mechanical devices such as motors through gears, so that the turntable 16 can be rotated more conveniently.

[0023] In order to ensure the overall sealing performance of the discharge device, the valve cover 9 is fixedly connected with a protrusion 7, and the protrusion 7 is conical. The protrusion 7 extends into the valve body 1, and the valve stem 3 passes through the protrusion 7. A sealing ring 8 is arranged between the valve stem 3 and the protrusion 7.

[0024] In order to further improve the sealing performance, the valve stem 3 is fixedly connected with the second piston 4, the second piston 4 is sleeved on the valve stem 3 and is parallel to the first piston 2, and the second piston 4 is fixedly connected with a sealing block 5 on the side facing away from the first piston 2, and the sealing block 5 is provided with a conical groove 6 matching the raised portion 7. When the flexion needle 23 is bent and deformed, the medium pushes the first piston 2 and the valve stem 3 to move, and the valve stem 3 drives the second piston 4 to move synchronously during the process until the sealing block 5 fits tightly with the raised portion 7, thereby preventing the medium from leaking through the gap between the valve stem 3 and the valve cover 9.

[0025] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pin-type pressure vessel safety relief device, comprising a valve body (1) and a valve cover (9), wherein a first piston (2) is slidably disposed in the valve body (1), the first piston (2) is coaxially fixedly connected to a valve stem (3), one end of the valve stem (3) extends out of the valve cover (9) and is coaxially connected to a bending needle (23), characterized in that: The valve cover (9) is fixedly connected to a mounting cylinder (10), and one end of the mounting cylinder (10) away from the valve cover (9) is rotatably connected to a turntable (16), and the flexion needle (23) is detachably connected to the turntable (16), and the turntable (16) is fixedly connected to an externally threaded sleeve (25), and the externally threaded sleeve (25) extends into the mounting cylinder (10), and the externally threaded sleeve (25) is cooperatively connected to an internally threaded sleeve (24), and the internally threaded sleeve (24) is fixedly connected to a plurality of sliders (12), and a slide groove (11) for accommodating the sliders (12) is provided on the inner wall of the mounting cylinder (10), and the slide groove (11) extends along the axial direction of the mounting cylinder (10), and the valve stem (3) is fixedly connected to a push plate (26) after extending from the valve cover (9), and the push plate (26) is located in the mounting cylinder (10), and the push plate (26) is located between the valve cover (9) and the internally threaded sleeve (24); A plurality of handles (17) are fixedly connected to a side of the rotating disk (16) facing away from the valve cover (9); The valve cover (9) is fixedly connected to a raised portion (7), and the raised portion (7) is conical. The raised portion (7) extends into the valve body (1), and the valve stem (3) passes through the raised portion (7). A sealing ring (8) is provided between the valve stem (3) and the raised portion (7).

2. A pin-type pressure vessel safety release device according to claim 1, characterized in that: An end of the mounting tube (10) away from the valve cover (9) is fixedly connected to a first annular clamping plate (13), the first clamping plate (13) is fixedly connected to a cylindrical baffle (14), the baffle (14) is fixedly connected to a second annular clamping plate (15), and the rotating disk (16) is rotatably arranged between the first clamping plate (13) and the second clamping plate (15).

3. A pin-type pressure vessel safety release device as claimed in claim 1, characterized in that: Both ends of the flexion needle (23) are detachably connected to a mounting seat (21), one of the mounting seats (21) is fixedly connected to the valve stem (3), and the other mounting seat (21) is fixedly connected to a positioning plate (20); A first mounting hole (18) and a second mounting hole (28) are provided in the middle of the rotating disk (16). The first mounting hole (18) and the second mounting hole (28) are connected to each other. The first mounting hole (18) passes through a side of the rotating disk (16) facing away from the valve cover (9), and the second mounting hole (28) passes through a side of the rotating disk (16) close to the valve cover (9). The first mounting hole (18) is also connected to a plug hole (27). The plug hole (27) extends in a direction parallel to the rotating disk (16) and both ends of the plug hole (27) pass through the side wall of the rotating disk (16). The plug hole (27) divides the first mounting hole (18) into two parts along the axial direction. A top plate (19) is detachably provided in the insertion hole (27), the positioning plate (20) is arranged in the first mounting hole (18), and the positioning plate (20) is located on a side of the top plate (19) facing the valve cover (9), and the mounting seat (21) fixedly connected to the positioning plate (20) is arranged in the second mounting hole (28).

4. A pin-type pressure vessel safety release device as claimed in claim 3, characterized in that: The turntable (16) is fixedly connected to a guide cylinder (22), the guide cylinder (22) extends into the interior of the mounting cylinder (10), the guide cylinder (22) is connected to the second mounting hole (28), and a mounting seat (21) fixedly connected to the positioning plate (20) extends into the guide cylinder (22).

5. A pin-type pressure vessel safety release device as claimed in claim 1, characterized in that: The valve stem (3) is fixedly connected to a second piston (4), the second piston (4) is sleeved on the valve stem (3) and is parallel to the first piston (2), and a sealing block (5) is fixedly connected to the side of the second piston (4) facing away from the first piston (2), and a conical groove (6) matching the raised portion (7) is formed on the sealing block (5).

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