A water-cooled positive pressure cabinet

Abstract

This utility model discloses a water-cooled positive pressure cabinet, belonging to the field of pneumatic control technology. It includes a positive pressure cabinet shell, a back door of the shell, a positive pressure purging device, a pressure relief unit, and a cooling and filtering unit. The shell is hollow, with a support frame installed at the bottom. The back door is located on the rear side wall of the shell, the positive pressure purging device is installed on the front side wall, the pressure relief unit is installed on the right side wall, and the cooling and filtering unit is installed at the bottom. This invention solves the problems in existing technologies where the positive pressure cabinet lacks cooling capacity and requires complete replacement of the pressure relief unit when adjusting the set pressure, leading to performance degradation or burnout of internal electrical equipment, increased operating costs, and reduced work efficiency. It improves equipment operating efficiency, extends equipment lifespan, and simplifies operation.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic control technology, specifically to a water-cooled positive pressure cabinet. Background Technology

[0002] A positive pressure cabinet is a protective device used in explosive hazardous locations, widely employed in industries such as petroleum, petrochemicals, natural gas, and chemicals. These industrial sites may release hazardous explosive gases during production processes. If electrical equipment is used in such environments, it is installed within a positive pressure cabinet. The explosion-proof principle of a positive pressure cabinet is achieved by continuously introducing fresh air or inert gas at a certain pressure into the cabinet's enclosure, displacing the hazardous gases within the chamber. After displacement, the gas pressure is maintained, ensuring that the internal pressure of the enclosure remains higher than the external environment. This prevents external flammable gases from entering and isolates the ignition source from contact with the explosive gases, thus achieving explosion protection.

[0003] However, existing positive pressure switchgear still has some shortcomings. On the one hand, electrical equipment generates a lot of heat during operation, such as transformers. If only positive pressure switchgear is used for explosion-proof modification, heat may accumulate inside the switchgear, causing a decline in the performance of the electrical equipment, and in severe cases, even burning out the equipment. Existing positive pressure switchgear does not have efficient cooling performance and cannot effectively protect some electrical equipment that generates a lot of heat from explosion. On the other hand, the set pressure requirements of the pressure relief unit of the positive pressure switchgear vary in different working environments. Existing positive pressure switchgear requires the entire pressure relief unit to be replaced, which not only increases the cost of use but also seriously affects the efficiency of operation.

[0004] Therefore, how to provide a water-cooled positive pressure cabinet to overcome the shortcomings of the existing technology is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] Therefore, this utility model provides a water-cooled positive pressure cabinet to solve the problems in the prior art where the positive pressure cabinet lacks cooling capacity and the pressure relief unit needs to be replaced as a whole when adjusting the set pressure, which leads to the internal electrical equipment being prone to performance degradation or burnout, as well as increased usage costs and reduced work efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model discloses a water-cooled positive pressure cabinet, comprising:

[0008] The positive pressure cabinet has a hollow outer shell, and a support frame is installed at the bottom of the positive pressure cabinet outer shell;

[0009] The back door of the positive pressure cabinet is located on the rear side wall of the positive pressure cabinet housing;

[0010] A positive pressure purging device is installed on the front side wall of the positive pressure cabinet shell;

[0011] The pressure relief unit is installed on the right side wall of the positive pressure cabinet casing;

[0012] A cooling and filtration unit is installed at the bottom of the positive pressure cabinet housing.

[0013] Furthermore, the cooling filter unit includes:

[0014] The unit shell is a hollow structure and is located on the lower side of the positive pressure cabinet shell. An air inlet duct and an air outlet duct are welded to the top of the unit shell. The unit shell is connected to the positive pressure cabinet shell through the air inlet duct and the air outlet duct.

[0015] A water-circulating surface cooler is installed inside the unit housing and located on the lower side of the air outlet duct;

[0016] An explosion-proof axial flow fan is installed at the bottom of the water circulation surface cooler;

[0017] An air filter is installed inside the air outlet duct and is located on the upper side of the water circulation surface cooler.

[0018] Furthermore, the pressure relief unit includes:

[0019] The valve body is installed on the right side wall of the positive pressure cabinet shell, and the outer side wall of the valve body is provided with a pressure relief port;

[0020] A guide sleeve is disposed inside the valve body;

[0021] A valve stem is slidably connected in the guide sleeve, and an annular flange is integrally formed on the side wall of the valve stem, and a valve core is integrally formed at the end of the valve stem.

[0022] A pressure regulating seat is disposed inside the valve body and slidably connected to the valve stem; the top of the pressure regulating seat protrudes through the side wall of the valve body;

[0023] A pressure adjusting spring is disposed between the pressure adjusting seat and the annular flange;

[0024] The pressure regulating component is located on the outer wall of the valve body.

[0025] Furthermore, the voltage regulating component includes:

[0026] A connecting plate is disposed on the outer wall of the valve body;

[0027] A ratchet is rotatably connected to the side wall of the connecting plate;

[0028] The pressure adjusting lever is fixedly connected to the side wall of the ratchet and rotates with the ratchet;

[0029] The ratchet is rotatably connected to the side wall of the connecting plate and engages with the ratchet to achieve unidirectional transmission.

[0030] A spring is fixedly connected at one end to the side wall of the connecting plate, and the other end of the spring is connected to the side wall of the ratchet.

[0031] Furthermore, the positive pressure cabinet outer shell includes a base plate and an upper shell, the upper shell being fixedly installed on the top of the base plate by bolts, and the connection is sealed by a sealing gasket.

[0032] Furthermore, a rain cover is installed on the top of the upper housing.

[0033] Furthermore, lifting rings for hoisting are installed on the top of the upper housing and the side wall of the bottom plate.

[0034] This utility model has the following advantages:

[0035] This invention effectively reduces the internal temperature of the cabinet by incorporating a cooling and filtration unit, preventing the risk of electrical components burning out due to overheating. It also improves equipment operating efficiency and purifies the gas entering the cabinet during cooling, preventing dust from affecting heat dissipation and extending equipment lifespan. The inclusion of a pressure relief unit and pressure regulating components enables precise control of the pressure relief threshold, ensuring the internal pressure remains higher than ambient pressure and preventing the infiltration of flammable gases. Users can easily adjust the set pressure without complex disassembly or specialized tools, simplifying the operation process and improving work efficiency, allowing for rapid response when pressure adjustments are needed. The addition of a rain cover enables outdoor use of the equipment. Attached Figure Description

[0036] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0037] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0038] Figure 1 A perspective view of the water-cooled positive pressure cabinet provided for this utility model;

[0039] Figure 2 This is a front view of the water-cooled positive pressure cabinet provided by this utility model;

[0040] Figure 3 A perspective view of the back door of the positive pressure cabinet provided by this utility model;

[0041] Figure 4 This is a sectional view of the positive pressure cabinet shell provided by this utility model;

[0042] Figure 5 A cross-sectional view of the cooling and filtering unit provided by this utility model;

[0043] Figure 6 This is a front view of the pressure relief unit provided by this utility model;

[0044] Figure 7 A cross-sectional view of the pressure relief unit provided by this utility model;

[0045] Figure 8 Provided by this utility model Figure 7 Enlarged view of the A-structure.

[0046] In the diagram: 1. Positive pressure cabinet outer shell; 11. Support frame; 12. Positive pressure cabinet outer shell back door; 13. Base plate; 14. Upper shell; 15. Rain cover; 16. Lifting ring; 2. Positive pressure purging device; 3. Pressure relief unit; 31. Valve body; 32. Pressure relief port; 33. Guide sleeve; 34. Valve stem; 35. Annular flange; 36. Valve core; 37. Pressure regulating seat; 38. Pressure regulating spring; 39. Pressure regulating assembly; 391. Connecting plate; 392. Ratchet; 393. Pressure regulating rod; 394. Ratchet; 395. Spring; 4. Cooling and filtering unit; 41. Unit shell; 42. Air inlet duct; 43. Air outlet duct; 44. Water circulation surface cooler; 45. Explosion-proof axial flow fan; 46. Air filter. Detailed Implementation

[0047] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. 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.

[0048] Please refer to Figures 1-8 The water-cooled positive pressure cabinet disclosed in this utility model will now be described. This utility model consists of 5 parts, as follows: Figure 1 , Figure 2 , Figure 3 As shown, the system includes a positive pressure cabinet shell 1, a positive pressure cabinet shell back door 12, a positive pressure purging device 2, a pressure relief unit 3, and a cooling and filtering unit 4. The positive pressure cabinet shell 1 has a hollow structure, and a support frame 11 is installed at the bottom of the positive pressure cabinet shell 1. The positive pressure cabinet shell back door 12 is located on the rear side wall of the positive pressure cabinet shell 1. The positive pressure purging device 2 is installed on the front side wall of the positive pressure cabinet shell 1. The pressure relief unit 3 is installed on the right side wall of the positive pressure cabinet shell 1. The cooling and filtering unit 4 is installed at the bottom of the positive pressure cabinet shell 1. In this embodiment, the location of the positive pressure cabinet shell back door 12 is as follows: Figure 3 As shown, after the positive pressure cabinet is installed, the internal components are inspected through the back door 12 of the positive pressure cabinet shell. The back door 12 of the positive pressure cabinet shell is sealed to the positive pressure cabinet shell 1. A wiring flange is installed on the left side wall of the positive pressure cabinet shell 1. The positive pressure purging device 2 is a standard component of the positive pressure cabinet, which can introduce compressed air or inert gas into the positive pressure cabinet shell 1 for replacement, automatically completing the "purging-pressure holding" process. By setting up the cooling filter unit 4, the internal temperature of the cabinet can be effectively reduced, avoiding the risk of electrical components burning out due to overheating, while improving the operating efficiency of the equipment. In addition, while cooling, the gas entering the cabinet can also be purified to prevent dust from affecting heat dissipation and extend the service life of the equipment. By setting up the pressure relief unit 3, the pressure relief threshold can be precisely controlled to ensure that the pressure inside the cabinet is always higher than the ambient pressure, preventing the infiltration of flammable gases.

[0049] like Figure 4 , Figure 5 As shown, the cooling and filtering unit 4 includes a unit housing 41, a water-circulating surface cooler 44, an explosion-proof axial flow fan 45, and an air filter 46. The unit housing 41 has a hollow structure and is located on the lower side of the positive pressure cabinet housing 1. An air inlet duct 42 and an air outlet duct 43 are welded to the top of the unit housing 41. The unit housing 41 is connected to the positive pressure cabinet housing 1 through the air inlet duct 42 and the air outlet duct 43. The water-circulating surface cooler 44 is installed inside the unit housing 41 and is located below the air outlet duct 43. The explosion-proof axial flow fan 45 is installed at the bottom of the water-circulating surface cooler 44. The air filter 46 is installed inside the air outlet duct 43 and is located above the water-circulating surface cooler 44. In this embodiment, as... Figure 5As shown, inside the unit housing 41, from bottom to top, are arranged an explosion-proof axial flow fan 45, a water-circulating surface cooler 44, and an air filter 46. The bottom plate 13 of the positive pressure cabinet housing 1 has two through holes, which are connected to the air inlet duct 42 and the air outlet duct 43 respectively to form a circulation path. A guide plate is also provided on the lower side of the air inlet duct 42. The output end of the explosion-proof axial flow fan 45 is connected to the input end of the water-circulating surface cooler 44, and the output end of the water-circulating surface cooler 44 is connected to the input end of the air filter 46. When the explosion-proof axial flow fan 45 is working, it blows airflow towards the water-circulating surface cooler 44. The airflow undergoes heat exchange in the water-circulating surface cooler 44, becoming cold airflow. The cold airflow then enters the air filter 46 for filtration and finally enters the interior of the positive pressure cabinet housing 1. By setting up a water-cooled surface cooler 44, an explosion-proof axial flow fan 45, and an air filter 46, water-cooled circulating cooling is achieved, which significantly improves the heat dissipation efficiency inside the positive pressure cabinet shell 1. The air filter 46 is set in the air outlet duct 43 to form an airflow path of "cooling first and then filtering", ensuring that the cold air entering the positive pressure cabinet shell 1 is dry and clean, and ensuring the safe, efficient and stable operation of the electrical components inside the positive pressure cabinet shell 1.

[0050] like Figure 6 , Figure 7 As shown, the pressure relief unit 3 includes a valve body 31, a guide sleeve 33, a valve stem 34, a pressure regulating seat 37, a pressure regulating spring 38, and a pressure regulating assembly 39. The valve body 31 is installed on the right side wall of the positive pressure cabinet shell 1. A pressure relief port 32 is provided on the outer side wall of the valve body 31. The guide sleeve 33 is disposed inside the valve body 31. The valve stem 34 is slidably connected in the guide sleeve 33. An annular flange 35 is integrally formed on the side wall of the valve stem 34. A valve core 36 is integrally formed at the end of the valve stem 34. The pressure regulating seat 37 is disposed inside the valve body 31 and slidably connected to the valve stem 34. The top of the pressure regulating seat 37 protrudes through the side wall of the valve body 31. The pressure regulating spring 38 is disposed between the pressure regulating seat 37 and the annular flange 35. The pressure regulating assembly 39 is disposed on the outer side wall of the valve body 31. In this embodiment, the valve body 31, the guide sleeve 33, and the pressure regulating seat 37 are shaped as follows: Figure 7 As shown, the valve body 31 consists of upper and lower parts, installed via a flange structure. This design facilitates installation and maintenance. An annular groove with an inner diameter larger than the valve body 31's inner diameter is cut inside the valve body 31. The guide sleeve 33 can be installed within this annular groove, forming an interlocking fit to secure the guide sleeve 33. An annular flange 35 is located on the side of the guide sleeve 33 away from the positive pressure cabinet housing 1. The distance between the annular flange 35 and the valve core 36 is greater than the length of the guide sleeve 33's sleeve portion. This design allows the valve stem 34 to be lifted during pressure relief, thus achieving the purpose of pressure relief. By incorporating the pressure regulating component 39, users can easily adjust the set pressure without complex disassembly or specialized tools. This simplifies the operation process, improves work efficiency, and enables rapid response when pressure adjustment is required.

[0051] like Figure 7 , Figure 8 As shown, the pressure regulating assembly 39 includes a connecting plate 391, a ratchet 392, a pressure regulating rod 393, a ratchet tooth 394, and a spring 395. The connecting plate 391 is disposed on the outer wall of the valve body 31. The ratchet 392 is rotatably connected to the side wall of the connecting plate 391. The pressure regulating rod 393 is fixedly connected to the side wall of the ratchet 392 and rotates with the ratchet 392. The ratchet tooth 394 is rotatably connected to the side wall of the connecting plate 391 and engages with the ratchet 392 to achieve unidirectional transmission. One end of the spring 395 is fixedly connected to the side wall of the connecting plate 391, and the other end of the spring 395 is connected to the side wall of the ratchet tooth 394. In this embodiment, the connection relationship of the ratchet 392, the pressure regulating rod 393, and the ratchet tooth 394 is as follows: Figure 8 As shown, by setting ratchet 392 and ratchet 394, the pressure adjusting rod 393 can rotate in one direction, thereby cooperating with the pressure adjusting seat 37 to adjust the set pressure of the pressure relief unit 3. Preferably, the top of the pressure adjusting seat 37 is rounded. It is worth noting that when the pressure adjusting rod 393 presses the pressure adjusting seat 37 to the lowest point, the pressure adjusting spring 38 should still have deformation, so that the valve core 36 still has a certain upward space.

[0052] like Figure 4 As shown, the positive pressure cabinet housing 1 includes a base plate 13 and an upper housing 14. The upper housing 14 is fixedly installed on top of the base plate 13 by bolts, and the connection is sealed by a gasket. In this embodiment, during installation, the base plate 13 is first hoisted onto the support frame 11, then the electrical equipment requiring explosion-proof protection is placed inside, and finally the upper housing 14 is hoisted and fitted to the base plate 13, and sealed with bolts and a gasket.

[0053] like Figure 2 As shown, a rain cover 15 is installed on the top of the upper housing 14. In this embodiment, by providing the rain cover 15, the device is capable of outdoor use.

[0054] like Figure 3 As shown, lifting rings 16 for hoisting are installed on the top of the upper housing 14 and the side wall of the bottom plate 13. In this embodiment, by providing lifting rings 16, the upper housing 14 and the bottom plate 13 can be lifted and installed by hoisting equipment.

[0055] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A water-cooled, positive pressure cabinet, characterized by, include: The positive pressure cabinet shell (1) is a hollow structure, and a support frame (11) is installed at the bottom of the positive pressure cabinet shell (1); The back door (12) of the positive pressure cabinet is located on the rear side wall of the positive pressure cabinet housing (1); A positive pressure purging device (2) is installed on the front side wall of the positive pressure cabinet shell (1); The pressure relief unit (3) is installed on the right side wall of the positive pressure cabinet housing (1); A cooling filter unit (4) is installed at the bottom of the positive pressure cabinet housing (1).

2. The water cooled positive pressure cabinet of claim 1, wherein, The cooling filter unit (4) includes: The unit shell (41) is a hollow structure. The unit shell (41) is located on the lower side of the positive pressure cabinet shell (1). An air inlet duct (42) and an air outlet duct (43) are welded to the top of the unit shell (41). The unit shell (41) is connected to the positive pressure cabinet shell (1) through the air inlet duct (42) and the air outlet duct (43). A water-circulating surface cooler (44) is installed inside the unit housing (41) and located on the lower side of the air outlet duct (43); An explosion-proof axial flow fan (45) is installed at the bottom of the water circulation surface cooler (44); An air filter (46) is installed inside the air outlet duct (43) and located on the upper side of the water circulation surface cooler (44).

3. The water cooled, positive pressure cabinet of claim 1, wherein, The pressure relief unit (3) includes: A valve body (31) is installed on the right side wall of the positive pressure cabinet housing (1), and a pressure relief port (32) is provided on the outer side wall of the valve body (31); A guide sleeve (33) is disposed inside the valve body (31); The valve stem (34) is slidably connected in the guide sleeve (33), the side wall of the valve stem (34) is integrally formed with an annular flange (35), and the end of the valve stem (34) is integrally formed with a valve core (36). A pressure regulating seat (37) is disposed inside the valve body (31) and slidably connected to the valve stem (34); the top of the pressure regulating seat (37) protrudes through the side wall of the valve body (31); A pressure adjusting spring (38) is disposed between the pressure adjusting seat (37) and the annular flange (35); The pressure regulating assembly (39) is disposed on the outer wall of the valve body (31).

4. The water cooled positive pressure cabinet of claim 3, wherein, The voltage regulating component (39) includes: A connecting plate (391) is disposed on the outer side wall of the valve body (31); A ratchet (392) is rotatably connected to the side wall of the connecting plate (391); The pressure adjusting rod (393) is fixedly connected to the side wall of the ratchet (392) and rotates with the ratchet (392); The ratchet (394) is rotatably connected to the side wall of the connecting plate (391) and engages with the ratchet (392) to achieve unidirectional transmission; A spring (395) is fixedly connected at one end to the side wall of the connecting plate (391), and the other end of the spring (395) is connected to the side wall of the ratchet (394).

5. The water-cooled positive pressure switchgear as described in claim 1, characterized in that, The positive pressure cabinet outer shell (1) includes a base plate (13) and an upper shell (14). The upper shell (14) is fixedly installed on the top of the base plate (13) by bolts, and the connection is sealed by a sealing gasket.

6. The water-cooled positive pressure switchgear as described in claim 5, characterized in that, A rain cover (15) is installed on the top of the upper housing (14).

7. The water-cooled positive pressure switchgear as described in claim 5, characterized in that, Lifting rings (16) for hoisting are installed on the top of the upper housing (14) and the side wall of the bottom plate (13).

Images