CN219963996U - Cold box - Google Patents

Abstract

The utility model relates to a cold box, which comprises a cold box and a rectifying tower, wherein the rectifying tower is arranged in the cold box, and the bottom of the rectifying tower is fixedly connected with the cold box; a first support is arranged at the position, close to the top, of the rectifying tower, and a first mounting hole is formed in the first support; a mounting plate is arranged in the cold box along the vertical direction of the cold box, and a second mounting hole in a strip shape is formed in the position, close to the top of the cold box, along the vertical direction of the mounting plate; first connecting pieces are arranged in the first mounting holes and the second mounting holes to connect the first support and the mounting plate. Before the rectifying tower and the cold box are hoisted and erected, the first connecting piece connecting the first support and the mounting plate is unscrewed, so that the rectifying tower and the cold box do not shake in the hoisting process; the second mounting hole is in a strip shape, so that the rectifying tower can stretch and retract relative to the cold box; the bolts on the first mounting holes are not required to be manually removed, and the workload of the site is reduced.

Description

Cold box

Technical Field

The utility model relates to the technical field of cold box equipment, in particular to a cold box.

Background

The skid-mounted cold box is formed by assembling the steel shell cold box, the rectifying tower, the pipeline and parts thereof together in a workshop. The skid-mounted cold box can be divided into an integrated type and a sectional type according to the transportation condition and the equipment scale, if various equipment, pipelines and the like can be well arranged in the cold box together and can meet the transportation requirement, the integrated skid-mounted cold box can be considered to be adopted; the skid-mounted cold box can be divided into square and round according to the appearance, the skid-mounted square cold box is of a common structural type in the air separation industry, the design and manufacturing technology is mature, the installation experience is rich, and the cold box framework arrangement is easy to meet the requirements of transportation and hoisting; the skid-mounted circular cold box is a novel cold box structure in the air separation industry, the circular cold box is simple in design, the design period is greatly shortened, and the manufacturing is convenient, so that the manufacturing time is saved.

Because the cold box is inconsistent with the rectification tower in cold expansion and contraction during operation, the rectification tower is required to be provided with a support which is completely disconnected with the cold box so as to meet the requirement that the tower can freely expand and contract in the cold box without being constrained by the cold box. When the cold box is assembled in a workshop, the support on the tower is fixed with the vertical beam rail of the cold box through bolts or welding fixing pieces, so that equipment in the cold box and the pipe fittings are prevented from shaking and collision in the transportation process, and the performance is prevented from being influenced; after the cold box is put on site, personnel enter the cold box, and bolts or welding fixing pieces on the support below the tower top are removed or cut off; leaving a bolt or a welding fixing piece on a support close to the top of the tower, and preventing the cold box and the tower from shaking in the process of hanging the cold box; after the cold box is hung, people climb the tower top again, and remove bolts on the support of the tower top or cut off welding fixing pieces, so that the workload of the site is large.

Disclosure of Invention

The utility model provides the cold box for overcoming the technical problems that in the prior art, after the cold box is hung up, personnel need to climb the top of the tower again, remove bolts on a support of the top of the tower or cut off welding fixing pieces, so that the workload on site is large.

In order to solve the technical problems, the utility model adopts the following technical scheme: the cold box comprises a cold box and a rectifying tower, wherein the rectifying tower is arranged in the cold box, and the bottom of the rectifying tower is fixedly connected with the cold box; a first support is arranged at the position, close to the top, of the rectifying tower, and a first mounting hole is formed in the first support; a mounting plate is arranged in the cold box along the vertical direction of the cold box, and a second mounting hole in a strip shape is formed in the position, close to the top of the cold box, along the vertical direction of the cold box; and a first connecting piece is arranged in the first mounting hole and the second mounting hole so as to connect the first support and the mounting plate.

In the technical scheme, before the rectifying tower and the cold box are hoisted and erected, a first connecting piece for connecting the first support and the mounting plate is unscrewed, so that large radian shaking does not occur between the rectifying tower and the cold box in the hoisting process, the first connecting piece is not dismantled in the process, the first support is arranged at the position, close to the top, of the rectifying tower, and the mounting quality is ensured; the first connecting piece is unscrewed to ensure that the rectifying tower and the cold box can relatively stretch; specifically, in the cold box operation working process, after the first connecting piece is unscrewed, no pretightening force exists between the mounting plate and the first support, and further, because the second mounting hole is in a bar shape in the vertical direction, in the rectifying tower and the cold box operation process, the first support arranged on the rectifying tower moves along with the rectifying tower, so that the first connecting piece arranged on the first support can move up and down in the second mounting hole, and the rectifying tower can shrink up and down relative to the cold box, and normal operation of the rectifying tower is ensured. According to the structure, the first connecting piece on the second mounting hole is not required to be manually removed, so that the workload of a site is reduced, and the working efficiency is improved. It should be noted that the cold box is in a vertical state during operation.

Preferably, the first mounting hole is a threaded hole, the first connecting piece is a first bolt, and the first bolt is mounted in the threaded hole and the second mounting hole to connect the first support and the mounting plate.

Preferably, the first connecting piece is a second bolt, and the second bolt is installed in the first installation hole and the second installation hole and is locked by a nut.

Preferably, the first mounting hole is a circular hole.

Preferably, a plurality of second supports positioned below the first supports are arranged on the rectifying tower along the vertical direction of the rectifying tower; the second support is provided with third mounting holes, a plurality of fourth mounting holes are formed in the mounting plate at positions corresponding to the third mounting holes, and second connecting pieces are mounted in the third mounting holes and the fourth mounting holes to connect the support with the mounting plate. In the technical scheme, a plurality of second supports for connecting the mounting plates are arranged below the tower top, and the transportation process can play a role in fixing the cold box and the rectifying tower; in addition, the first support and the second support can share the weight of the cold box and the rectifying tower, and the single support is prevented from being deformed by weight.

Preferably, the third mounting hole is a circular hole or a bar-shaped hole arranged along the vertical direction.

Preferably, thickening layers are respectively arranged at positions of the inner wall of the cold box corresponding to the first support and the second support.

Preferably, the cold box is a round cold box.

Preferably, the mounting plate is provided with reinforcing ribs, and the reinforcing ribs are connected with the mounting plate and the inner wall of the cold box.

Preferably, the mounting plate is a rail for mounting the rectifying column into the cold box.

Compared with the prior art, the utility model has the beneficial effects that: before the rectifying tower and the cold box are hoisted and erected, the first connecting piece connecting the first support and the mounting plate is unscrewed, and the first connecting piece is not dismantled in the process so as to ensure that large radian shaking does not occur between the rectifying tower and the cold box in the hoisting process and ensure the mounting quality; the first connecting piece is unscrewed for one circle to ensure that the rectifying tower and the cold box can relatively stretch; specifically, in the cold box operation working process, after the first connecting piece is unscrewed, no pretightening force exists between the mounting plate and the first support, and further, because the second mounting hole is in a bar shape in the vertical direction, in the rectifying tower and the cold box operation process, the first support arranged on the rectifying tower moves along with the rectifying tower, so that the first connecting piece arranged on the first support can move up and down in the second mounting hole, and the rectifying tower can shrink up and down relative to the cold box, and normal operation of the rectifying tower is ensured. The first connecting piece on the second mounting hole is not required to be manually dismantled by the structure of the embodiment, so that the workload of the site is reduced, and the working efficiency is improved. It should be noted that the cold box is in a vertical state during operation.

Drawings

FIG. 1 is a view showing the overall construction of a cooling box according to embodiment 1 of the present utility model;

FIG. 2 is a cross-sectional view of A-A of FIG. 1;

FIG. 3 is a second mounting hole configuration of the cold box of the present utility model;

FIG. 4 is a fourth mounting hole configuration of the cold box of the present utility model;

FIG. 5 is a view showing the whole construction of a cooling box according to embodiment 3 of the present utility model;

fig. 6 is a schematic cross-sectional view of A-A of fig. 5.

In the accompanying drawings: 1. a cold box; 2. a rectifying tower; 3. a first support; 4. a mounting plate; 5. a second mounting hole; 6. an anchor bolt; 7. a first lifting lug; 8. the second lifting lug; 9. a fourth mounting hole; 10. and a second support.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are orientations or positional relationships indicated by terms "upper", "lower", "left", "right", "long", "short", etc., based on the orientations or positional relationships shown in the drawings, this is merely for convenience in describing the present utility model and simplifying the description, and is not an indication or suggestion that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present patent, and that it is possible for those of ordinary skill in the art to understand the specific meaning of the terms described above according to specific circumstances.

The technical scheme of the utility model is further specifically described by the following specific embodiments with reference to the accompanying drawings:

example 1

As shown in fig. 1, 2 and 3, a cold box 1 comprises a cold box 1 and a rectifying tower 2, wherein the rectifying tower 2 is arranged in the cold box 1, and the bottom of the rectifying tower 2 is fixedly connected with the cold box 1; a first support 3 is arranged at the position, close to the top, of the rectifying tower 2, and a first mounting hole is formed in the first support 3; a mounting plate 4 is arranged in the cold box 1 along the vertical direction of the cold box, and a second mounting hole 5 in a strip shape is formed in the position, close to the top of the cold box 1, of the mounting plate 4 along the vertical direction of the cold box; first connecting pieces are arranged in the first mounting holes and the second mounting holes 5 to connect the support 3 and the mounting plate 4.

In this embodiment, before the rectifying tower 2 and the cold box 1 are lifted and erected, the first connecting piece connecting the first support 3 and the mounting plate 4 is unscrewed, so as to ensure that large radian shaking does not occur between the rectifying tower 2 and the cold box 1 in the lifting process, the first connecting piece is not removed in the process, and the first support 3 is mounted at the position of the rectifying tower 2 close to the top, so that the mounting quality is ensured; the first connecting piece is unscrewed to ensure that the rectifying tower 2 and the cold box 1 can relatively stretch; specifically, in the running working process of the cold box 1, after the first connecting piece is unscrewed, no pretightening force exists between the mounting plate 4 and the first support 3, and because the second mounting hole 5 is in a strip shape in the vertical direction, in the working process of the rectifying tower 2 and the cold box 1, the first support 3 arranged on the rectifying tower 2 moves along with the rectifying tower 2, so that the first connecting piece arranged on the first support 3 can move up and down in the second mounting hole 5, and the rectifying tower 2 can shrink up and down relative to the cold box 1, thereby ensuring the normal working of the rectifying tower 2. The structure of the embodiment does not need to manually dismantle the bolts on the second mounting holes 5, reduces the workload of the site and improves the working efficiency. It should be noted that the cold box 1 is in a vertical state during operation. Specifically, the rectifying column 2 has a sliding distance of approximately 3mm per meter. Here, 3mm expansion and contraction is considered per meter, i.e., 3mm expansion and contraction is considered for a 1 meter tower, and 90mm expansion and contraction is considered for a 30 meter tower.

Further, in this embodiment, the assembly site of the cold box 1 and the rectifying tower 2 is a workshop, and after the assembly is completed, the assembled whole device is transported to the installation site; furthermore, in the assembly process, the cold box 1 and the rectifying tower 2 are horizontally arranged so as to be convenient to install. An auxiliary wheel is arranged on the first support 3 and can move on the mounting plate 4 to assist the installation of the rectifying tower 2; after the rectifying tower 2 is pushed to enable the first support 3 to move into place, the auxiliary wheel can be moved away by means of a jack; and the first connecting piece passes through the first mounting hole and the second mounting hole 5 to connect the first support 3 and the mounting plate 4. Of course, not only the rectifying tower 2 but also other necessary devices such as pipes are provided in the cold box 1.

In this embodiment, the first mounting hole is a threaded hole, the first connecting piece is a first bolt, and the first bolt is mounted in the threaded hole and the second mounting hole 5 to connect the first support 3 and the mounting plate 4. In this embodiment, the screw of the first bolt passes through the second mounting hole 5 and the screw structure of the screw is screwed with the screw hole, and the end face of the head abuts on the end face of the mounting plate 4 to fasten the first mount 3 and the mounting plate 4. Before hanging and installing, the first bolt is unscrewed, so that pretightening force is absent between the first support 3 and the installing plate 4.

As shown in fig. 1, a plurality of second supports 10 positioned below the first support 3 are arranged on the rectifying tower 2 along the vertical direction; the second support 10 is provided with third mounting holes, a plurality of fourth mounting holes 9 are formed in the mounting plate 4 at positions corresponding to the third mounting holes, and second connecting pieces are arranged in the third mounting holes and the fourth mounting holes 9 to connect the second support 10 with the mounting plate 4. In the embodiment, a plurality of second supports 10 for connecting the mounting plate 4 are also arranged below the tower top, and the transportation process can play a role in fixing the cold box 1 and the rectifying tower 2; in addition, the first support 3 and the second support 10 can share the weight of the cold box 1 and the rectifying tower 2, and prevent the single support from being deformed by weight. The second connecting piece of this embodiment is the same as the first connecting piece, and is the first bolt.

In the present embodiment, the fourth mounting hole 9 is a circular hole or a bar-shaped hole provided in the vertical direction. When the fourth mounting hole 9 is a circular hole (see fig. 4), all the first bolts on the fourth mounting hole 9 need to be removed after the cold box 1 is transported to the site; when the fourth mounting hole 9 is a strip-shaped hole, after the cold box 1 is transported to the site, all the first bolts on the fourth mounting hole 9 can be dismounted, and only the first bolts are unscrewed, so that the shrinkage of the rectifying tower 2 is not influenced; of course, the first bolts on the fourth mounting holes 9 may be completely removed, so that the first bolts are prevented from being blocked. Compared to bar-shaped holes, circular holes are better machined.

As shown in fig. 1, the first support 3 and the second support 10 have the same structure and are leg supports. For large cold boxes, the box length is 37.5m, the diameter is 4.3m, and the total weight is 180t (see FIG. 1); the size of the cold box reaches the transportation limit, and only the waterway and the short-distance highway transportation can be realized; the frame vehicle for complete road transportation cannot ensure that the cold box 1 and the rectifying tower 2 do not deform or displace greatly in long-time land transportation jolting; due to the restriction of the transportation road space, especially road transportation; in the transportation state, the height of the cold box 1 is generally limited to be not more than 4.5m, the length is not more than 40m, otherwise, the cold box 1 cannot pass through part of highway bridge holes or toll stations, so that the external dimension of the cold box 1 needs to be compressed as much as possible on the premise of meeting the requirements of the rectifying tower 2 and the pipeline arrangement, the distance between the cold box 1 and the rectifying tower 2 is relatively short, and leg supports are recommended on the premise of considering the cold insulation distance (300 mm) (see fig. 2). Specifically, three pairs of leg type supports (including 1 first support 3 and 2 second supports 10) are arranged on the rectifying tower 2 so as to meet the requirement of transportation strength. Further, when the cold box 1 and the rectifying tower 2 are assembled in a workshop, first bolts on the 2 pairs of leg type supports below the top of the rectifying tower 2 are screwed down so as to fix the cold box 1 and the rectifying tower 2 and prevent shaking between the cold box 1 and the rectifying tower 2 in the transportation process. After the cooling box is transported to the installation site, a worker can enter the cooling box 1 to detach all the first bolts on the fourth installation holes 9, and unscrew the first bolts at the second installation holes 5.

In this embodiment, the cold box 1 is a circular cold box. Namely, the appearance of the cold box is round; the mounting plate 4 is welded on the inner wall of the circular cold box along the vertical direction. The skid-mounted circular cold box is of a novel cold box structure, and has various advantages, such as simple design, and can greatly shorten the design period; is convenient to manufacture, saves manufacturing time, and the like. Further, the round cold box material is made of Q345R plates with good performance and low price.

It should be noted that, for the circular cold box, the inlet cold box of the rectifying tower 2 can only adopt a pushing mode, namely, two parallel mounting plates 4 are additionally arranged in the circular cold box for the rectifying tower 2 to drop feet and push into the circular cold box. The rectifying tower 2 is usually installed in the cold box 1 in a horizontal state, the installation levelness of the rectifying tower directly influences the verticality after standing on site, if the levelness is poor, the verticality can be influenced, further the rectifying efficiency and the heat exchange efficiency of the rectifying tower are influenced, and the purity of a product is influenced, so that the installation plate 4 is required to be horizontally welded on the inner wall of the cold box 1 during production.

In this embodiment, thickening layers are respectively arranged on the inner wall of the cold box 1 at positions corresponding to the first support 3 and the second support 10. The total weight of the large integrated skid-mounted cold box is 180t, except that the bottom of the rectifying tower 2 is welded and fixed with a cross beam at the bottom of the cold box 1 through a skirt, the rest weight is pressed on the first support 3 and the second support 10, and the wall thickness of the round cold box is only 16mm; the thickening layer ensures that severe local deformations of the cold box wall are avoided when the rectifying column 2 is applied to the cold box wall by gravity during transportation and lifting.

In this embodiment, the mounting plate 4 is provided with reinforcing ribs, which connect the mounting plate 4 with the inner wall of the cold box 1. On the basis of setting a thickening layer, reinforcing ribs are additionally arranged on the mounting plate 4, so that the supporting strength of the mounting plate 4 is ensured, and the cold box 1 is firmer.

As shown in fig. 1 and 5, the bottom of the cold box 1 is provided with anchor bolts 6. The bottom of the cold box 1 of the embodiment is fixed on the concrete by anchor bolts 6.

As shown in fig. 1 and 5, a first lifting lug 7 is arranged on the cold box 1, and a second lifting lug 8 is arranged on the rectifying tower 2. The mounting panel 4 that sets up in cold box 1 of this embodiment is T guide rail, and the rectifying column hoist and mount of second lug 8 are convenient for enter the cold box.

Example 2

This embodiment is similar to embodiment 1 described above, except that the first connector is a second bolt that is mounted in the first and second mounting holes 5 and is locked by a nut. Specifically, the first mounting hole of this embodiment is the unthreaded hole, and the screw rod of second bolt passes first mounting hole and second mounting hole, and the screw rod leaks partial installation nut, screws up the nut for the head terminal surface butt of second bolt is on mounting panel 4, the nut terminal surface butt is on first support 3, in order to fasten first support 3 and mounting panel 4. Furthermore, the nut is unscrewed before hanging and installing.

In this embodiment, the first mounting hole is a circular hole. In this embodiment, after the nuts of the second bolts are loosened, when the rectifying tower 2 and the cold box 1 shrink relatively, a pretightening force is absent between the first support 3 and the mounting plate 4, and the rectifying tower 2 enables the first support 3 to move up and down relatively to the mounting plate 4.

In this embodiment, the mounting plate 4 is a rail for mounting the rectifying column 2 into the cold box 1. Specifically, the mounting plate 4 is T-shaped steel.

Example 3

This embodiment is similar to embodiment 1 described above, except that the first support 3 and the second support 10 are identical in structure and are saddle-type supports as shown in fig. 5 and 6. For a medium-sized integrated skid-mounted cold box, the cold box is 16.8m long, 3.6m in diameter and 100t in total weight (see fig. 5), and the cold box is moderate in size and weight and has no problem even in whole-course road transportation. The distance between the cold box 1 and the rectifying tower 2 in the medium-sized integrated skid-mounted cold box is proper, and a saddle-type support is adopted; specifically, 2 pairs of saddle-shaped supports (namely 1 first support 3 and 1 second support 10) are arranged on the rectifying tower 2, so that the requirements on transportation strength can be met, and the number of supports can be reduced. Further, when the cold box 1 and the rectifying tower 2 are assembled in a workshop, the first bolt of the saddle support on the rectifying tower 2 is screwed to fix the cold box 1 and the rectifying tower 2, so that shaking between the cold box 1 and the rectifying tower 2 in the transportation process is prevented. After the device is transported to an installation site, a worker can enter the cold box 1 to detach the first bolt on the fourth installation hole 9 and unscrew the first bolt on the second installation hole 5; then hanging up will be carried out.

In this embodiment, the cold box 1 is a square cold box. I.e. the cold box 1 has a square shape. The skid-mounted square cold box is of a common structural type, the Q235B steel with good performance and low price is adopted as a material, the design and manufacturing technology is mature, the installation experience is rich, and the transportation and hoisting of the cold box 1 are easy to meet due to the framework arrangement, so that the size of the skid-mounted square cold box can be quite large, and the maximum size of the skid-mounted square cold box can be 12 ten thousand air minutes.

For square cold box, it is easier to use vertical beam as mounting plate for tower to push the cold box, or directly open top panel of the cold box to hoist the tower into the cold box from top to bottom, and the levelness of square cold box is good, and the levelness of tower can be ensured.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The cold box comprises a cold box (1) and a rectifying tower (2), wherein the rectifying tower (2) is arranged in the cold box (1) and the bottom of the rectifying tower (2) is fixedly connected with the cold box (1); the rectifying tower is characterized in that a first support (3) is arranged at the position, close to the top, of the rectifying tower (2), and a first mounting hole is formed in the first support (3); a mounting plate (4) is arranged in the cold box (1) along the vertical direction of the cold box, and a second mounting hole (5) in a strip shape is formed in the position, close to the top of the cold box (1), of the mounting plate (4) along the vertical direction; and a first connecting piece is arranged in the first mounting hole and the second mounting hole (5) so as to connect the first support (3) and the mounting plate (4).

2. Cold box according to claim 1, wherein the first mounting hole is a threaded hole and the first connection piece is a first bolt, which is mounted in the threaded hole, the second mounting hole (5) to connect the first support (3) with the mounting plate (4).

3. Cold box according to claim 1, characterized in that the first connection piece is a second bolt, which is mounted in the first and second mounting holes (5) and is locked by a nut.

4. A cold box according to claim 3, wherein the first mounting hole is a circular hole.

5. -cold box according to any one of claims 1 to 3, characterised in that the rectifying column (2) is provided with a plurality of second supports (10) in its vertical direction, situated below the first supports (3); the second support (10) is provided with third mounting holes, a plurality of fourth mounting holes (9) are formed in the mounting plate (4) at positions corresponding to the third mounting holes, and second connecting pieces are mounted in the third mounting holes and the fourth mounting holes (9) to connect the second support (10) with the mounting plate (4).

6. Cold box according to claim 5, characterized in that the fourth mounting hole (9) is a circular hole or a bar-shaped hole arranged in a vertical direction.

7. Cold box according to claim 5, characterized in that the inner wall of the cold box (1) is provided with a thickening layer in the position corresponding to the first support (3) and the second support (10), respectively.

8. A cold box according to any one of claims 1 to 3, characterized in that the cold box (1) is a circular cold box.

9. A cold box according to any one of claims 1 to 3, wherein the mounting plate (4) is provided with reinforcing ribs connecting the mounting plate (4) with the inner wall of the cold box (1).

10. A cold box according to any one of claims 1 to 3, characterized in that the mounting plate (4) is a rail for mounting the rectifying column (2) into the cold box (1).