An indirect air return system for a pressure reducing pool in severe cold regions

Abstract

The present invention relates to the field of large-volume pressure reduction systems, and specifically to an indirect air return system for a pressure reduction pool in extremely cold regions, comprising a protective shell and a supporting substrate, and also comprising: a pressure reduction mechanism, which is connected to the supporting substrate; and an air return component, which is respectively connected to the supporting substrate and the pressure reduction mechanism; wherein the air return component comprises a heating unit and a buffer unit, one side end of the heating unit is connected to the buffer unit, the buffer unit comprises a transition space, the transition space is located between the protective shell, the pressure reduction mechanism and the heating unit, and the transition space is connected to the pressure reduction mechanism. The indirect air return system for a pressure reduction pool in extremely cold regions of the present invention can reduce the length of an air return pipeline, and at the same time, can slow down the wind speed on the windward side of a hot water heating air return device, so that outdoor air is fully heated before entering the interior of the pressure reduction mechanism, thereby reducing the influence of cold air on the pressure reduction mechanism.

Description

Technical Field

[0001] The invention relates to the field of large-volume decompression systems, in particular to an indirect air return system for a decompression pool in severe cold regions. Background Art

[0002] In recent years, the country has invested heavily in building various types of hydrodynamic test platforms in the field of national defense science and technology industry. This type of test unit project provides a rough vacuum test environment in the large space above the pool (decompression chamber) through a vacuum pump. After the test, the large decompression chamber needs to be restored to normal pressure. Due to the large pressure difference between the inside and outside of the decompression chamber, natural air return is generally achieved using atmospheric pressure. Due to certain requirements for the air return time, the average air return port speed in the initial stage of the air return process is very high, reaching more than 300m / s.

[0003] The current problem is that for decompression pools located in extremely cold areas, the outdoor temperature is extremely low in winter, generally reaching -20°C, and even -30°C under extreme conditions. Directly taking outdoor air for return air will have a certain impact on the pool. Therefore, in view of the above situation, it is urgent to develop an indirect air return system for decompression pools in extremely cold areas to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The object of the present invention is to provide an indirect air return system for a decompression pool in a severely cold region to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An indirect air return system for a decompression pool in a severe cold region, comprising a protective shell and a supporting substrate, wherein the protective shell is located on the supporting substrate, and further comprising:

[0007] a decompression mechanism connected to the support base and located in the protective shell; and

[0008] An air return assembly, the air return assembly being connected to the support base and the pressure reducing mechanism respectively;

[0009] Among them, the return air component includes a heating unit and a buffer unit, one side end of the heating unit is connected to the buffer unit, the buffer unit includes a transition space, the transition space is located between the protective shell, the pressure reducing mechanism and the heating unit, and the transition space is connected to the pressure reducing mechanism.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] When the pressure reducing mechanism finishes working and needs to be restored to normal pressure, a heating unit is set up, wherein the heating unit can use hot water provided by the external thermal network as a heating source, so that the return air can be heated, and the heated air can be first transported to the transition space, wherein the transition space is the space surrounded by the protective shell, the pressure reducing mechanism and the heating unit. When the heated air enters the transition space, it can play a buffering role, thereby reducing the length of the return air duct. At the same time, the wind speed on the windward side of the hot water heating return air device can be slowed down, and the time that the outdoor air stays in the heating unit can be increased, so that the outdoor air can be fully heated before entering the pressure reducing mechanism, reducing the impact of cold air on the pressure reducing mechanism, providing convenience for the staff, and worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the civil construction conditions of the present invention.

[0013] Figure 2 It is a schematic diagram of the principle of the air return system in the present invention.

[0014] Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure of part A.

[0015] In the figure: 1-return air heating unit, 2-muffler, 3-first valve component, 4-second valve component, 5-third valve component, 6-inlet pipe, 7-first return air pipe, 8-second return air pipe, 9-protective shell, 10-transition space, 11-decompression bulkhead, 12-decompression chamber, 13-water surface, 14-pool, 15-air inlet channel, 16-filter element, 17-heating element, 18-drainage element, 19-support matrix, 20-heating box. 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] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0018] See also Figure 1 and Figure 2 The embodiment of the present invention provides an indirect air return system for a pressure reducing pool in a severe cold region, comprising a protective shell 9 and a supporting substrate 19, wherein the protective shell 9 is located on the supporting substrate 19, and further comprising:

[0019] A decompression mechanism, which is connected to the support base 19 and is located inside the protective shell 9; and

[0020] An air return assembly, the air return assembly is connected to the support base 19 and the pressure relief mechanism respectively;

[0021] Among them, the return air component includes a heating unit and a buffer unit, one side end of the heating unit is connected to the buffer unit, the buffer unit includes a transition space 10, the transition space 10 is located between the protective shell 9, the pressure reducing mechanism and the heating unit, and the transition space 10 is connected to the pressure reducing mechanism.

[0022] When the pressure reducing mechanism finishes working and needs to be restored to normal pressure, a heating unit is set up, wherein the heating unit can use hot water provided by the external thermal network as a heat source, so that the return air can be heated, and the heated air can be first transported to the transition space 10, wherein the transition space 10 is the space surrounded by the protective shell 9, the pressure reducing mechanism and the heating unit. When the heated air enters the transition space 10, it can play a buffering role, thereby reducing the length of the return air duct. At the same time, the wind speed on the windward side of the hot water heating return air device can be slowed down, and the time that the outdoor air stays in the heating unit can be increased, so that the outdoor air can be fully heated before entering the pressure reducing mechanism, thereby reducing the impact of cold air on the pressure reducing mechanism, providing convenience for the staff, and worthy of promotion.

[0023] In one embodiment of the present invention, see Figure 2 , the heating unit comprises:

[0024] A heating box 20, the heating box 20 is connected to the supporting substrate 19;

[0025] The return air heating unit 1 and the air inlet channel 15 are both located on the heating box 20;

[0026] An air intake pipe 6, both ends of which are respectively connected to the return air heating unit 1 and the air intake channel 15; and

[0027] A first valve component 3 , wherein the first valve component 3 is located on the air intake pipe 6 .

[0028] Through the air inlet passage 15, the cold air from the outside can first enter the air inlet passage 15. Since the air inlet passage 15 has a large space, it can avoid the air flow speed at the connection between the equipment and the outside being too high, thereby inhaling a large amount of dust. When the air enters the air inlet passage 15, it is opened by the first valve member 3, wherein the first valve member 3 can adopt an electric closed insulation valve, so that the air in the air inlet passage 15 can enter the return air heating unit 1 through the air inlet pipe 6 for heating, and the heated air can enter the transition space 10 through the air outlet provided on the other side of the heating box 20.

[0029] In one embodiment of the present invention, see Figure 2 and Figure 3 , further comprising: a filter element 16 and a flow guide element 18, wherein the filter element 16 and the flow guide element 18 are respectively located at two ends of the return air heating unit 1; and

[0030] The heating element 17 is located in the middle of the return air heating unit 1, and the two ends of the heating element 17 are respectively connected to the filter element 16 and the guide element 18; the heating element 17 includes a hot water heating coil and an auxiliary electric heater.

[0031] By setting up a filter element 16, wherein the filter element 16 can be in the form of a filter net, or in the form of activated carbon or other adsorption materials, and of course can also adopt other structures, which will not be described in detail here, impurities in the air can be filtered, and the filtered air enters the heating element 17 for heating, and the heated air is transported to the transition space 10 through the drainage effect of the drainage element 18, wherein the drainage element 18 can be in the form of a fan, which will not be described in detail here.

[0032] In one embodiment of the present invention, see Figure 2 , further comprising: a muffler 2, the muffler 2 being located on the heating unit;

[0033] a first air return pipe 7, both ends of which are respectively connected to the muffler 2 and the pressure reducing mechanism; and

[0034] A second valve member 4, wherein the second valve member 4 is located on the first air return pipe 7;

[0035] The buffer unit further includes: a second air return pipe 8, one end of which is located in the transition space 10, and the other end of which is connected to the decompression mechanism; and

[0036] A third valve member 5, the third valve member 5 being located on the second air return pipe 8;

[0037] The second valve member 4 and the third valve member 5 are both electric high vacuum gate valves.

[0038] After the air is heated in the return air heating unit 1, a part of the hot air enters the transition space 10, and the other part of the hot air enters the silencer 2, and is opened by the second valve member 4, so that the hot air can enter the decompression mechanism through the first return air pipe 7. When the pressure in the decompression mechanism recovers to 0.7-0.8atm, the buffer unit can be started to open the third valve member 5 that was originally closed, and the hot air in the transition space 10 enters the decompression mechanism through the second return air pipe 8 at the same time, so that the decompression mechanism can be gradually restored to normal pressure. The diameters of the first return air pipes 7 and 8 need to be calculated based on factors such as the pressure inside and outside the decompression chamber and the time to restore the standard atmospheric pressure.

[0039] In one embodiment of the present invention, see Figure 1 , the pressure relief mechanism comprises:

[0040] A decompression bulkhead 11, wherein the decompression bulkhead 11 is connected to the support base 19, and a decompression chamber 12 is formed between the decompression bulkhead 11 and the support base 19; and

[0041] The water pool 14 is located on the supporting base 19 and is connected to the decompression chamber 12 .

[0042] By setting up the decompression bulkhead 11, wherein the decompression bulkhead 11 is connected to an external vacuum pump, a rough vacuum test environment can be formed in the decompression chamber 12 for relevant personnel to conduct test work, and a water pool 14 is provided directly below the decompression bulkhead 11, wherein the water pool 14 contains clean water, and the clean water is connected to the decompression chamber 12 through a water surface 13 formed by the water pool 14, thereby providing a hydrodynamic test platform.

[0043] It should be noted that in the present invention, unless otherwise clearly specified and limited, the terms "slide", "rotate", "fix", "have" and the like should be understood in a broad sense, for example, it can be a welding connection, a bolt connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An indirect air return system for a decompression pool in a severely cold region, comprising a protective shell and a supporting substrate, wherein the protective shell is located on the supporting substrate, and is characterized in that: Also includes: A decompression mechanism, the decompression mechanism is connected to the support base and is located in the protective shell; An air return assembly, the air return assembly being connected to the support base and the pressure reducing mechanism respectively; Wherein, the air return assembly includes a heating unit and a buffer unit, one side end of the heating unit is connected to the buffer unit, the buffer unit includes a transition space, the transition space is located between the protective shell, the decompression mechanism and the heating unit, and the transition space is connected to the decompression mechanism; The decompression mechanism comprises: a decompression bulkhead, the decompression bulkhead is connected to the support base, and a decompression chamber is formed between the decompression bulkhead and the support base; and A water pool, the water pool is located on the supporting base and is connected to the decompression chamber; The heating unit comprises: a heating box connected to the supporting substrate; A return air heating unit and an air inlet duct, wherein the return air heating unit and the air inlet duct are both located on the heating box; An air intake pipe, both ends of which are respectively connected to the return air heating unit and the air intake duct; and a first valve member, the first valve member being located on the air inlet pipe; It also includes: a filter element and a flow guide element, wherein the filter element and the flow guide element are respectively located at two ends of the return air heating unit; and A heating element, wherein the heating element is located in the middle of the return air heating unit, and both ends of the heating element are respectively connected to the filter element and the flow guide element; The heating element includes a hot water heating coil and an auxiliary electric heater; It also includes: a muffler device, the muffler device is located on the heating unit; a first air return pipe, wherein both ends of the first air return pipe are respectively connected to the muffler and the pressure reducing mechanism; and a second valve member, the second valve member being located on the first air return pipe; The buffer unit further includes: a second air return pipe, one end of which is located in the transition space, and the other end of which is connected to the decompression mechanism; and A third valve component is located on the second air return pipe.

2. The indirect air return system for the decompression pool in severe cold regions according to claim 1 is characterized in that: The second valve component and the third valve component are both electric high vacuum gate valves.

Images