Pearlite filling device

Abstract

The utility model relates to the field of low-temperature deep cooling, and particularly discloses a pearlife filling device which comprises a cold box, a low-temperature pump and a dead-corner-preventing filling mechanism, a groove is formed in the top of the cold box, the low-temperature pump is installed at the bottom of the groove, a pearlife filling opening is formed in the portion, on one side of the groove, of the cold box, and an installation flange is arranged on the other side of the groove. The number of the mounting flanges is at least three, the mounting flanges are arranged in parallel at equal intervals, the two mounting flanges on the outermost side are located at the corners of the top of the cold box respectively, and pipe joints corresponding to the mounting flanges are arranged on the side wall of the cold box. And the dead-angle-preventing filling mechanism comprises a pulse type air cannon and a bag-type dust collector which is detachably mounted on the corresponding mounting flange. Through the design of the dead angle prevention mechanism, dead angle space areas of the top corners of the cold box are completely filled with pearlife, the problems of cold energy loss, pump head cavitation, cold box wall hanging frosting and freezing, even cold box carbon steel embrittlement at low temperature and the like in the operation period of the low-temperature pump can be solved, energy consumption is reduced, and potential safety hazards are eliminated.

Description

Technical Field

[0001] This utility model relates to the field of cryogenic cryogenics, specifically to a perlite filling device suitable for the dead zone area of ​​cryogenic pump cold boxes for liquid oxygen, liquid nitrogen, liquid argon, and LNG. Background Technology

[0002] Currently, multi-stage vertical cryogenic pumps use the original cold box filled with perlite for insulation. The upper layer of the cold box is the perlite filling port, and the lower layer is the cryogenic pump mounting port. This cold box structure has voids in the perlite filling area, mainly concentrated in the right-angled area near the cryogenic pump mounting port, forming a triangular cubic dead zone (see appendix). Figure 3 This blind spot can lead to increased cooling loss, pump head cavitation, frost and ice buildup on the walls of the cold box, and even brittleness of the carbon steel material in the cold box at low temperatures, increasing energy consumption and posing safety risks.

[0003] Therefore, there is an urgent need to design a perlite filling device to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a perlite filling device. Through the design of the anti-dead-angle mechanism, the top corner and dead-angle space of the cold box can be completely filled with perlite, which can solve problems such as cold loss, pump head cavitation, frost and ice on the cold box wall, and even low-temperature brittleness of the carbon steel material of the cold box during the operation of the low-temperature pump, thereby reducing energy consumption and eliminating safety risks.

[0005] To solve the above technical problems, this utility model provides a perlite filling device, including a cold box, a cryogenic pump and a dead-angle prevention filling mechanism. The top of the cold box is provided with a groove, the cryogenic pump is installed at the bottom of the groove, a perlite filling port is provided on one side of the cold box and a mounting flange is provided on the other side. There are at least three mounting flanges arranged side by side at equal distances. The two outermost mounting flanges are located at the top corners of the cold box. Each mounting flange has a pipe joint on its side wall.

[0006] The anti-dead-angle filling mechanism includes a pulse air cannon and a bag filter detachably installed on each of the mounting flanges. The pulse air cannon is installed on the top of the cold box near the perlite filling port, and its outlet is connected to an air supply pipe. The air supply pipe extends into the cold box and is located below the groove. A valve is provided on the air supply pipe. Each bag filter has a filter chamber above it. An air supply pipe is installed on one side of each filter chamber. Each air supply pipe is connected in parallel to the air supply pipe. A valve is provided on each air supply pipe. A collection bag is provided in the filter chamber. An air outlet is provided at the top of the filter chamber. A valve is provided at the air outlet. A collection chamber is provided below each bag filter. The collection chamber is connected to the inner cavity of the cold box by a gate. An air pipe connected to the pipe joint is provided on one side of the collection chamber. A valve is provided on the air pipe.

[0007] Furthermore, the air tube extending into the filter chamber is provided with several air holes.

[0008] Furthermore, the bag filter is mounted on the mounting flange via a flange.

[0009] Furthermore, a guide plate is provided on one side of the gas pipeline, the guide plate is arc-shaped and is installed inside the cold box by a support frame.

[0010] Furthermore, a noise reducer is installed at the air outlet.

[0011] Furthermore, the perlite filling device also includes a temperature measuring gun and a blind flange. The temperature measuring gun is used to detect the temperature of the cold box, and the blind flange is used to seal the mounting flange after the bag filter is removed.

[0012] The beneficial effects of this utility model are:

[0013] This invention, through its anti-dead-angle mechanism design, ensures that the top and corner spaces of the cold box are completely filled with perlite, solving problems such as cold loss during low-temperature pump operation, pump head cavitation, frost and ice formation on the cold box walls, and even low-temperature embrittlement of the carbon steel material of the cold box. This reduces energy consumption and eliminates safety risks. Specifically, after manual filling at the perlite filling port, if it is impossible to completely fill the dead-angle areas with perlite, gas from a pulse-type air cannon is used to push the perlite in the middle of the cold box upwards to the right corner of the cold box. The gas emitted by the bag filter is used to filter and intercept the perlite. After the intercepted perlite accumulates to a certain extent in the collection chamber, the gate is opened and the perlite falls back into the filling dead-angle area of ​​the cold box, achieving 100% filling of all spaces in the cold box with perlite and playing a solid role in the overall sand filling of the cold box. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the perlite filling device of this utility model;

[0016] Figure 2 This is a structural diagram of the bag filter of the perlite filling device of this utility model;

[0017] Figure 3 This is a schematic diagram of the existing cold box structure filled with perlite.

[0018] In the diagram: 1-Cold box, 2-Cryogenic pump, 3-Anti-dead-angle filling mechanism, 4-Guide plate, 5-Support frame, 11-Groove, 12-Perlite filling port, 13-Mounting flange, 14-Pipe joint, 31-Pulse air cannon, 32-Bag dust collector, 33-Air supply pipe one, 331-Valve one, 34-Gate, 35-Air pipe, 351-Valve four, 36-Flange, 37-Noise reducer, 321-Collection chamber, 322-Filter chamber, 3221-Collection bag, 323-Air supply pipe two, 3231-Valve two, 324-Outlet, 3241-Valve three. Detailed Implementation

[0019] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In one specific embodiment of this utility model, such as Figure 1-2 As shown, a perlite filling device includes a cold box 1, a cryogenic pump 2, and a dead-angle prevention filling mechanism 3. The top of the cold box 1 is provided with a groove 11, the cryogenic pump 2 is installed at the bottom of the groove 11, a perlite filling port 12 is provided on one side of the cold box 1 of the groove 11, and a mounting flange 13 is provided on the other side. There are at least three mounting flanges 13 arranged side by side at equal distances. The two outermost mounting flanges 13 are located at the top corners of the cold box 1, and a pipe joint 14 is provided on the side wall of each mounting flange 13.

[0021] The anti-dead-angle filling mechanism 3 includes a pulse air cannon 31 and a bag filter 32 detachably mounted on each mounting flange 13. The pulse air cannon 31 is mounted on the top of the cold box 1 near the perlite filling port 12, and its outlet is connected to an air supply pipe 33. The air supply pipe 33 extends into the cold box 1 and is located below the groove 11. A valve 331 is provided on the air supply pipe 33. Each bag filter 32 has a filter chamber 322 above it, and an air supply pipe 323 passes through one side of each filter chamber 322. Two 323s are all connected in parallel on the first air supply pipe 33. Each second air supply pipe 323 is equipped with a second valve 3231. The filter chamber 322 is equipped with a collection bag 3221. The top of the filter chamber 322 is equipped with an air outlet 324. The air outlet 324 is equipped with a third valve 3241. Each bag dust collector 32 is equipped with a collection chamber 321 below. The collection chamber 321 is connected to the inner cavity of the cold box 1 by a gate 34. One side of the collection chamber 321 is equipped with an air pipe 35 connected to the pipe joint 14. The air pipe 35 is equipped with a fourth valve 351.

[0022] This invention, through its anti-dead-angle mechanism design, ensures that the top and corner spaces of the cold box are completely filled with perlite, solving problems such as cold loss during low-temperature pump operation, pump head cavitation, frost and ice formation on the cold box walls, and even low-temperature embrittlement of the carbon steel material of the cold box. This reduces energy consumption and eliminates safety risks. Specifically, after manual filling at the perlite filling port, if it is impossible to completely fill the dead-angle areas with perlite, a pulse-type air cannon uses dry air to push the perlite in the middle of the cold box towards the top right corner. The exhaust gas from the bag filter intercepts the perlite, and after the intercepted perlite accumulates to a certain extent in the collection chamber, the gate is opened and the perlite falls back into the filling dead-angle area of ​​the cold box, achieving 100% filling of all spaces in the cold box with perlite and compacting the overall sand filling of the cold box.

[0023] like Figure 2 As shown, in this embodiment, there are three mounting flanges 13, which are equidistantly distributed. There are three bag filters 32, which are installed on the corresponding mounting flanges 13. The two outermost bag filters 32 are located at the top corner of the cold box 1, and the remaining one is located in between. This design can meet the requirements of preventing dead corner filling at the top corner of the cold box on the right side of the groove. In order to more accurately push the perlite to the dead corner area of ​​the cold box, especially at the corners on both sides, one of the three bag filters can be selected to perform the work of exhaust interception and collection of perlite first, and they can be used in turn until the dead corner space is completely filled with perlite.

[0024] In this invention, the determination of whether the dead corners of the cold box are fully filled can be made by collecting the perlite deposits at the cloth bag or by measuring the temperature of the cold box wall. If there is no temperature difference, it means that the box is full. Alternatively, it can be directly observed that there is no frost or ice on the cold box wall during operation, which indicates that there are no dead corner areas and the cold box is completely filled with perlite.

[0025] In this embodiment, the air pipe 35 extending into the filter chamber 322 is provided with several air holes. This design can improve the airflow stability and facilitate the initial drop of the perlite into the collection chamber through several air holes. The perlite that does not drop in is collected by the collection bag.

[0026] In this embodiment, the bag filter 32 is detachably mounted on the mounting flange 13 via the flange 36. After the perlite in the cold box is filled, the flange and the bag filter 32 are removed, and then the mounting flange 13 after the bag filter 32 is removed is sealed with a blind flange.

[0027] In this embodiment, a noise reducer 37 is installed at the air outlet 324 of the bag filter 32 to reduce noise.

[0028] In this embodiment, a guide plate 4 is provided on one side of the gas pipeline 33. The guide plate 4 is arc-shaped and is installed in the cold box 1 through the support frame 5. The design of the guide plate can play a certain guiding role in the filling process of perlite.

[0029] In this embodiment, a temperature measuring gun is also included. The temperature measuring gun is used to detect the temperature of the cold box 1 and help determine whether there are any gaps in the perlite at the corners of the cold box, thereby activating the anti-dead-angle filling mechanism.

[0030] The working process of this utility model is as follows:

[0031] Install the bag filter on the mounting flange; in the initial state, all valves and gates are closed; in specific applications, during the pre-cooling period of the low temperature pump start-up and commissioning, use a portable temperature gun to detect the temperature difference of the cold box wall, and the area with the lower detection value is the dead zone; or determine the dead zone based on the frost on the cold box wall; then open the anti-dead zone filling mechanism 3 to fill the dead zone area.

[0032] Open valves 3241, 331, and 351, and use the dry air from the pulse air cannon 31 to direct the perlite below the groove 11 towards... Figure 1The upper right corner of the filter is pushed, causing the perlite to be blown into the bag filter 32 through the air pipe 35. Some of the perlite falls into the collection chamber 321 through the air holes on the air pipe 35, while the rest is collected by the collection bag 3221. After a certain period of accumulation, valves 1 (331), 4 (351), and 3 (3241) are closed, and gate 34 and valve 2 (3231) are opened, allowing the perlite collected in the collection chamber 321 and the perlite intercepted in the collection bag 3221 to fall back to the desired position. Figure 1 In this embodiment, one of the three bag filters can be selected to work first in the filling dead zone on the right side of the intercooler box, and then they can be used in turn until all spaces in the cold box are 100% filled with perlite. Of course, the corresponding valves are also opened and closed accordingly, which will not be described in detail here.

[0033] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A pearlescent sand packing device, characterized by, The application relates to a cold box (1), a cryogenic pump (2) and an anti-corner filling mechanism (3), wherein the top of the cold box (1) is provided with a groove (11), the cryogenic pump (2) is installed at the bottom of the groove (11), the cold box (1) on one side of the groove (11) is provided with a pearl sand filling port (12), the other side is provided with mounting flanges (13), the mounting flanges (13) are at least three in number and are arranged equidistantly, the outermost two mounting flanges (13) are located at the top corners of the cold box (1) respectively, and a pipe joint (14) is arranged on the side wall of each mounting flange (13). The anti-corner filling mechanism (3) comprises pulse air cannons (31) and bag dust collectors (32) which are detachably installed on each mounting flange (13), the pulse air cannons (31) are installed on the top of the cold box (1) close to the pearl sand filling port (12), the air outlet end of each pulse air cannon (31) is connected with a gas conveying pipe (33), the gas conveying pipe (33) extends into the cold box (1) and is located below the groove (11), a valve (331) is arranged on the gas conveying pipe (33), each bag dust collector (32) is provided with a filtering cavity (322) above, a gas conveying pipe (323) is arranged on one side in each filtering cavity (322), each gas conveying pipe (323) is connected in parallel with the gas conveying pipe (33), a valve (3231) is arranged on each gas conveying pipe (323), a collecting bag (3221) is arranged in each filtering cavity (322), an air outlet (324) is arranged on the top of each filtering cavity (322), a valve (3241) is arranged on the air outlet (324), a collecting cavity (321) is arranged below each bag dust collector (32), the collecting cavity (321) is connected with the inner cavity of the cold box (1) through a gate plate (34), and a gas pipe (35) connected with the pipe joint (14) is arranged on one side of the collecting cavity (321).

2. A pearlescent sand filling apparatus as claimed in claim 1, wherein, A plurality of air holes are arranged on the gas pipe (35) extending into the filtering cavity (322).

3. A pearlescent sand filling apparatus as claimed in claim 1, wherein, The bag dust collector (32) is installed on the mounting flange (13) through a flange plate (36).

4. A pearlescent sand filling apparatus as claimed in claim 1, wherein, A guide plate (4) is arranged on one side of the gas conveying pipe (33), the guide plate (4) is in an arc shape and is installed in the cold box (1) through a support frame (5).

5. A pearlescent sand filling apparatus as claimed in claim 1, wherein, A noise reducer (37) is installed on the air outlet (324).

6. A pearlescent sand filling apparatus as claimed in claim 1, wherein, A temperature measuring gun and a blind plate are further arranged, the temperature measuring gun is used for detecting the temperature of the cold box (1), and the blind plate is used for plugging the mounting flange (13) after the bag dust collector (32) is removed.

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