CN217951339U - Cold box overpressure safety device - Google Patents

Abstract

The utility model discloses a cold box superpressure safety device, including the pressure relief pipe of vertical setting to and sealed lock in the pressure relief board of pressure relief pipe upper end, pressure relief pipe and pressure relief board link to each other through two at least connection sealing washer, at least two connect the sealing washer to locate respectively the inside and outside both sides of pressure relief pipe just slope down sets up, be equipped with on the pressure relief board a plurality of with connect sealing washer one-to-one complex sealing washer spread groove, the lower extreme of pressure relief board is equipped with connects the chimb, be equipped with on connecting the chimb with the upper end matched with spread groove of pressure relief pipe, the sealing washer spread groove is located on the inner wall of spread groove, still including being used for the restraint the constraint structure in pressure relief board jump path. The utility model discloses aim at solves the above-mentioned technical problem who exists among the prior art, provides cold box superpressure safety device, and it can guarantee good leakproofness under the normal operating condition to in time play the pressure release effect when the superpressure.

Description

Cold box overpressure safety device

Technical Field

The utility model relates to an empty cold box technical field that divides, concretely relates to cold box superpressure safety device.

Background

The air separation and various gas rectification cold box as the most important auxiliary device in the chemical and steel industry is increasingly built in every part of China. The air pressure inside and outside the cold box must be kept balanced due to the extremely low working temperature of the cold box, but under the accident condition, namely when a low-temperature liquid pipeline in the cold box leaks, the air pressure in the cold box is also increased rapidly in the moment due to the rapid expansion of the gasification volume of the cold box, and in order to ensure that the structure of the cold box is not damaged by overpressure, a safety device capable of providing a large discharge amount in a short time is required to ensure the safety of the structure of the cold box.

Because of the self characteristic of the cold box, all the openings on the cold box must have a sealing structure to prevent the energy exchange outside the cold box to ensure the energy conservation of the cold box, and simultaneously ensure that the surface of the cold box has no frost and dew formation phenomenon, so the safety device must ensure good sealing performance under the normal operation condition.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model discloses aim at solves the above-mentioned technical problem who exists among the prior art, provides cold box superpressure safety device, and it can guarantee good leakproofness under the normal operating condition to in time play the pressure release effect when the superpressure.

2. Technical scheme

In order to solve the above problem, the utility model provides a technical scheme does:

cold box superpressure safety device, including the pressure release pipe of vertical setting to and sealed lock in the pressure release board of pressure release pipe upper end, pressure release pipe and pressure release board link to each other through two at least connection sealing washer, at least two connect the sealing washer and locate respectively the inside and outside both sides of pressure release pipe and slope setting down, be equipped with on the pressure release board a plurality of with connect sealing washer one-by-one complex sealing washer spread groove, the lower extreme of pressure release board is equipped with connects the chimb, be equipped with on connecting the chimb with the upper end matched with spread groove of pressure release pipe, the sealing washer spread groove is located on the inner wall of spread groove, still including being used for the restraint structure in pressure release board plays the route.

Optionally, the constraint structure includes a plurality of constraint strips distributed along a circumferential direction of the pressure relief pipe, the constraint strips extend along an axial direction of the pressure relief pipe, and one end of the plurality of constraint strips, which is far away from the pressure relief pipe, is bent towards an axial center direction of the pressure relief pipe and is fixedly connected thereto.

Optionally, one end of each of the plurality of restraint strips, which is far away from the pressure relief pipe, is bent towards the axial direction of the pressure relief pipe and is connected to the same restraint plate.

Optionally, a plurality of connecting pieces are uniformly distributed on the outer wall of the pressure relief pipe along the circumferential direction of the pressure relief pipe, and one end of the restraint bar is fixedly connected to the connecting pieces through a bolt structure.

Optionally, the number of the restriction bars is not less than 4.

Optionally, the mounting height of the connecting piece is not lower than 150mm.

Optionally, the surface of the connecting seal ring and/or the inner wall surface of the connecting groove of the seal ring is roughened.

Optionally, the pressure relief plate is made of a carbon steel plate with a thickness not less than 6mm in a rolling mode.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

when the cold box overpressure safety device is used, the connecting sealing ring is extruded on the connecting convex edge due to the pressure in the cold box, the inside and the outside of the cold box are divided into two parts, the sealing of the cold box is ensured, and when the pressure in the cold box is not enough to flush the pressure relief plate, the pressure of the part is favorable for improving the sealing property between the pressure relief pipe and the pressure relief plate, and the deformation of the connecting sealing ring is aggravated due to the pressure of the part, so that the abutting sealing effect of the connecting sealing ring and the connecting convex edge is improved; under the working condition that overpressure is caused by leakage, the pressure generated by high-pressure gas is greater than the friction force generated by the connecting sealing ring, the pressure relief plate is flushed away, the quick pressure relief is realized, the safety of the cold box structure is ensured, and the pressure relief plate can be normally used by being mounted on the pressure relief cavity again after the overhaul is finished.

Drawings

Fig. 1 is a schematic structural diagram of a cold box overpressure safety device according to an embodiment of the present invention;

1. a pressure relief pipe; 2. a pressure relief plate; 3. connecting a sealing ring; 4. connecting the convex edge; 5. connecting grooves; 6. a restraint strip; 7. a restraint plate; 8. a connecting member.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "secured to," "disposed on," "secured to," or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, when one element is considered to be "fixedly connected" to another element, the two elements may be fixed by way of detachable connection, or may be fixed by way of non-detachable connection, such as socket connection, snap connection, integrally formed fixation, welding, etc., which can be realized in the prior art, and thus are not cumbersome. When an element is perpendicular or nearly perpendicular to another element, it is desirable that the two elements are perpendicular, but some vertical error may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The references to "first" and "second" in the present invention do not denote any particular quantity or order, but rather are merely used to distinguish one name from another.

With reference to fig. 1, the cold box overpressure safety device of this embodiment includes a pressure relief pipe 1 vertically disposed, and a pressure relief plate 2 sealingly fastened to an upper end of the pressure relief pipe 1, a corresponding hole is opened on a panel of the cold box according to an outer diameter of the pressure relief cavity, a lower end of the pressure relief pipe 1 is inserted into the hole by about 15 to 35mm, and the pressure relief pipe 1 and the panel of the cold box are welded together in a sealing welding manner to serve as a pressure relief pipeline, the pressure relief pipe 1 and the pressure relief plate 2 are connected through at least two connection seal rings 3, at least two of the connection seal rings 3 are respectively disposed on inner and outer sides of the pressure relief pipe 1 and are inclined downward, the connection seal rings 3 are disposed on inner and outer walls of an upper end of the pressure relief pipe 1, the connection seal rings 3 are inclined downward, an inclination angle is 45 ° in this embodiment, the connection seal rings 3 are rubber seal rings, the pressure relief plate 2 is provided with a plurality of connection seal rings 3, a connection convex edge 4 is disposed at a lower end of the connection convex edge 4, which is provided with a connection groove 5 at an upper end of the connection groove 5, and the connection groove 5 is embedded into the connection groove 5, and the connection groove 2 is configured to restrain the connection groove 5, and the connection groove 5 is disposed on an inner wall of the connection groove 2.

When the cold box overpressure safety device is used, the connecting sealing ring 3 is extruded on the connecting convex edge 4 due to the pressure in the cold box, the inside and the outside of the cold box are divided into two parts, the sealing of the cold box is ensured, and when the pressure in the cold box is not enough to flush the pressure relief plate 2, the pressure is favorable for improving the sealing property between the pressure relief pipe 1 and the pressure relief plate 2, and the deformation of the connecting sealing ring 3 is aggravated due to the pressure, so that the abutting sealing effect of the connecting sealing ring 3 and the connecting convex edge 4 is improved; under the working condition that overpressure is caused by leakage, the pressure generated by high-pressure gas is greater than the friction force generated by the connecting sealing ring 3, the pressure relief plate 2 is flushed away, the rapid pressure relief is realized, the safety of the structure of the cold box is ensured, and the pressure relief plate 2 can be normally used by being installed on the pressure relief cavity again after the overhaul is completed.

As the utility model discloses an alternative scheme, the restraint structure includes a plurality of edges restraint strip 6 that the 1 circumferencial direction of pressure release pipe distributes, restraint strip 6's quantity is not less than 4, restraint strip 6 is followed the axial direction of pressure release pipe 1 extends, restraint strip 6's one end link firmly in on the pressure release pipe 1, and a plurality of restraint strip 6 is kept away from the one end of pressure release pipe 1 to the axle center direction of pressure release pipe 1 is crooked and link firmly, and is a plurality of restraint strip 6 can the direct welding link firmly together, also can connect on same about the board 7, mainly form an inclosed space can effectively restrain the pressure release board 2 who comes the jump two splashes out because of the superpressure, make it splash in controllable space, effectively provide the security.

As the utility model discloses an alternative, there are a plurality of connecting pieces 8 along its circumferencial direction equipartition on the outer wall of pressure release pipe 1, connecting piece 8 selects the angle steel in this embodiment, link firmly in through the welding on the outer wall of pressure release sense 1, the one end of restriction strip 6 pass through bolted construction link firmly in on the connecting piece 8, mainly consider the ageing maintenance of connecting sealing washer 3, must adopt one section bolted connection, convenient dismantlement.

As the utility model discloses an alternative, the mounting height of connecting piece 8 is not less than 150mm, guarantees bolt construction's dismantlement space.

As the utility model discloses an alternative, connect the surface of sealing washer 3 and/or the inner wall surface of sealing washer spread groove is through roughening treatment, and the roughness of connecting sealing washer 3 and sealing washer spread groove interlock department is adjusted according to the technological requirement and is controlled frictional force to adjusting device's take off pressure.

As the utility model discloses an alternative, pressure relief plate 2 is rolled up by the carbon steel sheet that thickness is not less than 6mm and is formed, in order to guarantee pressure relief plate 2's compressive strength.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (8)

1. Cold box superpressure safety device, its characterized in that: including the pressure release pipe of vertical setting to and sealed lock in the pressure release board of pressure release pipe upper end, pressure release pipe and pressure release board link to each other through two at least connection sealing washer, at least two connect the sealing washer to locate respectively the inside and outside both sides of pressure release pipe and slope setting down, be equipped with on the pressure release board a plurality of with connect sealing washer one-to-one complex sealing washer spread groove, the lower extreme of pressure release board is equipped with connects the chimb, connect be equipped with on the chimb with the upper end matched with spread groove of pressure release pipe, the sealing washer spread groove is located on the inner wall of spread groove, still including being used for the restraint structure in pressure release board jump path.

2. A cold box over-pressure safety device according to claim 1, wherein: the restraint structure comprises a plurality of restraint strips distributed along the circumferential direction of the pressure relief pipe, the restraint strips extend along the axial direction of the pressure relief pipe, and one ends, far away from the pressure relief pipe, of the restraint strips are bent towards the axis direction of the pressure relief pipe and fixedly connected with the axis direction of the pressure relief pipe.

3. A cold box over-pressure safety device according to claim 2, wherein: one end of the plurality of restraint strips, which is far away from the pressure relief pipe, is bent towards the axis direction of the pressure relief pipe and is connected to the same restraint plate.

4. A cold box over-pressure safety device according to claim 2, wherein: the outer wall of the pressure relief pipe is uniformly provided with a plurality of connecting pieces along the circumferential direction, and one end of the restraint strip is fixedly connected to the connecting pieces through a bolt structure.

5. A cold box over-pressure safety device according to claim 2, wherein: the number of the constraint strips is not less than 4.

6. A cold box over-pressure safety device according to claim 4, wherein: the mounting height of the connecting piece is not less than 150mm.

7. A cold box over-pressure safety device according to any one of claims 1 to 6, wherein: the surface of the connecting sealing ring and/or the inner wall surface of the connecting groove of the sealing ring are/is roughened.

8. A cold box over-pressure safety device according to any one of claims 1 to 6, wherein: the pressure relief plate is formed by rolling a carbon steel plate with the thickness not less than 6 mm.

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