Protection device and method for starting box of lubricating oil pre-supply pump

Abstract

The invention discloses a protection device and method for a starting box of a lubricating oil pre-supply pump in the technical field of marine lubricating oil pumps, the protection device comprises a protection box body, a protection chamber used for installing the starting box and an air treatment chamber are arranged in the protection box body, and an air pump, a combustible gas removing device and an air post-treatment assembly are arranged in the air treatment chamber. A concentration sensor used for detecting the concentration of combustible gas is arranged in the protection chamber and used for controlling an air pump to introduce treated air when the concentration of the combustible gas in the protection chamber reaches an early warning value, and the concentration sensor used for detecting the concentration of the combustible gas is arranged in the sealed protection chamber and used for controlling the air pump to introduce the treated air when the concentration of the combustible gas in the protection chamber reaches the early warning value. According to the air treatment, external air is ignited in advance to eliminate combustion of combustible gas, then post-treatment such as dehumidification and cooling is carried out, and clean air is introduced into the protection chamber to reduce the risk of combustion explosion in the protection chamber.

Description

Technical Field

[0001] This invention relates to the field of marine lubricating oil pumps, and more specifically to a protection device and method for the starter box of a lubricating oil pre-supply pump. Background Technology

[0002] A lubricating oil pre-supply pump is an auxiliary pump that, before starting a large engine (especially a marine diesel engine) or at the initial stage of starting, pre-establishes the necessary oil pressure in the main lubrication system and forces the lubricating oil to be delivered to the surfaces of key friction pairs. The pre-supply pump and its starter control box are generally located close to the engine compartment. Since there may be flammable vapors (such as fuel vapors) in the engine compartment, the flammable gas in the engine compartment may exceed the standard. After the flammable gas enters the starter box, it may be ignited and exploded due to sparks generated by the starting and stopping of relays and electronic components.

[0003] In existing technologies, the start-up control box of the pre-supply pump is generally sealed to deal with many problems such as dust, moisture and flammable gas entering. However, gas can easily enter the start-up box during maintenance, and the heat generated during use causes the internal gas to expand and then contract, resulting in a certain amount of gas inhalation and exhalation. Flammable gas may still enter, and if the concentration exceeds a certain level, the sparks generated inside the start-up box can easily cause an explosion. Summary of the Invention

[0004] The purpose of this invention is to provide a protection device and method for the starter box of a lubricating oil pre-supply pump, which solves the problem that existing starter box protection devices are unable to eliminate combustible gases.

[0005] The present invention achieves the above objectives through the following technical solutions: A protective device for a lubricating oil pre-supply pump starter box includes a protective housing. The protective housing contains a protective chamber for installing the starter box and an air handling chamber. The air handling chamber contains an air pump, a combustible gas removal device, and an air post-treatment component. The protective chamber is equipped with a concentration sensor for detecting the concentration of combustible gas, which controls the air pump to introduce treated air when the concentration of combustible gas in the protective chamber reaches a warning value.

[0006] As a preferred embodiment of the present invention, the air aftertreatment assembly includes a dust removal device and a cooling and dehumidifying device disposed at the outlet of the combustible gas removal device. The dust removal device includes a housing and a filter element. The housing extends to the outside of the air treatment chamber, and the opening of the housing is provided with a baffle. If the outside air contains combustible gas, it is burned in the combustible gas removal device, and water vapor is generated after combustion. The gas after combustion is treated by dust removal, dehumidification, and cooling through the dust removal device and the cooling and dehumidifying device. The dust removal device can also be disposed at the air pump inlet, and the cooling and dehumidifying device can be connected to an external cold source to achieve the effect of condensation and dehumidification.

[0007] As a preferred embodiment of the present invention, the combustible gas removal device includes an explosion-proof combustion chamber and an ignition device disposed in the explosion-proof combustion chamber. By igniting the gas in the explosion-proof combustion chamber, the combustible gas is caused to burn or explode in advance, thereby eliminating the combustible gas.

[0008] In a preferred embodiment of the present invention, the explosion-proof combustion chamber has an inlet end and an exhaust end extending outward from its surface. Each inlet and exhaust end contains a valve block, and a valve plate is provided at one end of the valve block extending into the explosion-proof combustion chamber. The two valve plates open in opposite directions via a transmission mechanism. The surface of the valve block at the inlet end has a first side groove arranged parallel to the axis, and the surface of the valve block at the exhaust end has a second side groove arranged parallel to the axis. The length of the second side groove is greater than that of the first side groove. A solenoid valve is also provided outside the exhaust end. In this embodiment, since a sudden increase in internal gas pressure may occur when deflagration occurs in the explosion-proof combustion chamber, this design addresses the issue of potential deflagration. In situations where the conventional solenoid valve is subjected to continuous impact, it is easily damaged. To address this, the present invention uses valve plates to resist the impact, and the valve plates open in opposite directions. When the gas pressure in the explosion-proof combustion chamber is high, the air pump increases the pressure to push the valve plate at the air inlet to slide, thereby opening the valve plate at the air outlet. Due to the different lengths of the side grooves, the valve block at the air inlet will not open due to slight sliding, but will continue to push, while the valve block at the air outlet opens earlier. The gas in the explosion-proof combustion chamber is discharged from the air outlet and enters the protective chamber. When the valve block at the air inlet is fully opened, the solenoid valve closes, and the air pump pumps new air into the explosion-proof combustion chamber for the next round of combustion.

[0009] As a preferred embodiment of the present invention, the explosion-proof combustion chamber is spherical, and its inner wall has two grooves with spherical curved surfaces. The valve plate is a spherical plate adapted to the shape of the grooves, thereby improving the explosion-proof effect.

[0010] As a preferred embodiment of the present invention, the transmission mechanism includes a fixed part disposed in the explosion-proof combustion chamber, a gear disposed on the fixed part, and racks disposed on two valve plates. The two racks respectively mesh with the two sides of the gear. This embodiment specifically proposes a structure in which the two valve plates are opened in conjunction.

[0011] As a preferred embodiment of the present invention, the air pump is provided with an intake port extending to the outside of the protective housing, and the outlet end of the air pump is provided with a pressure relief valve for releasing the air pressure at the intake end to close the valve plate.

[0012] As a preferred embodiment of the present invention, the protective enclosure is further provided with an exhaust device, which includes a multi-way valve, exhaust ports located at multiple points in the protective chamber, and an extension pipe leading the exhaust ports to the multi-way valve. The multiple inlets of the multi-way valve are connected to the extension pipe, and the outlet is provided with a discharge pipe. The multi-way valve is used to switch exhaust ports to reduce exhaust dead zones. This solution, by setting the multi-way valve to cyclically open different exhaust ports, allows the airflow to cover more areas, which is beneficial to improving the air replacement effect in the protective chamber.

[0013] To implement the above-mentioned protection device, the present invention also proposes a protection method based on any of the above-mentioned lubrication protection devices, comprising the following steps: S1: The concentration of combustible gas in the protective room is detected by a concentration sensor. When the concentration reaches the warning value, the air pump is started to ventilate the protective room. S2: External gas is pumped into the combustible gas removal device by an air pump, ignited and burned to eliminate combustible gas in the external gas. The burned gas is then pumped into the air post-treatment component for dehumidification, dust removal and cooling, and then pumped into the protective chamber to squeeze out the combustible gas, preventing deflagration caused by sparks generated by electronic components.

[0014] The beneficial effects of this invention are as follows: by installing a concentration sensor to detect the concentration of combustible gas in a sealed protective chamber, when the concentration in the protective chamber reaches the warning value, treated air is introduced to ventilate the protective chamber. This air treatment involves pre-igniting the external air to eliminate the combustion of combustible gas, followed by dehumidification, cooling, and other post-treatments, and then introducing clean air into the protective chamber to reduce the risk of combustion and explosion in the protective chamber. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a front sectional view of the combustible gas removal device of the present invention; Figure 4 This is a top sectional view of the combustible gas removal device of the present invention; Figure 5 This is a schematic diagram of the valve block and valve plate inside the air intake end of the present invention; Figure 6 This is a schematic diagram of the valve block and valve plate inside the exhaust end of the present invention; In the diagram: 1. Protective enclosure; 101. Protective chamber; 102. Air handling chamber; 103. Concentration sensor; 2. Air pump; 201. Inlet; 202. Pressure relief valve; 3. Combustible gas removal device; 31. Explosion-proof combustion chamber; 32. Air inlet; 33. Exhaust end; 34. Ignition device; 35. Groove; 36. Valve plate; 37. Valve block; 38. First side groove; 39. Second side groove; 310. Fixing part; 311. Gear; 312. Rack; 313. Reinforcing rib; 4. Solenoid valve; 5. Dust removal device; 501. Filter element; 502. Baffle; 6. Exhaust device; 61. Multi-way valve; 62. Extension pipe; 63. Exhaust port; 64. Discharge pipe; 7. Cooling and dehumidification device. Detailed Implementation

[0016] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0017] Example 1 like Figure 1-6 As shown, a protective device for a lubricating oil pre-supply pump starter box includes a protective housing 1. The protective housing 1 is provided with a protective chamber 101 for installing the starter box and an air handling chamber 102. The air handling chamber 102 is provided with an air pump 2, a combustible gas removal device 3, and an air post-treatment component. The protective chamber 101 is provided with a concentration sensor 103 for detecting the concentration of combustible gas, which is used to control the air pump 2 to introduce treated air when the concentration of combustible gas in the protective chamber 101 reaches a warning value.

[0018] This solution involves installing a concentration sensor 103 to detect the concentration of combustible gas inside a sealed protective chamber 101. When the concentration inside the protective chamber 101 reaches a warning value, treated air is introduced to ventilate the protective chamber 101. This air treatment involves pre-igniting external air to eliminate the combustion of combustible gas, followed by dehumidification and cooling, and then introducing clean air into the protective chamber 101 to reduce the risk of combustion and explosion inside the protective chamber 101.

[0019] The air aftertreatment assembly includes a dust removal device 5 and a cooling and dehumidifying device 7 located at the outlet of the combustible gas removal device 3. The dust removal device 5 includes a housing and a filter element 501. The housing extends to the outside of the air treatment chamber 102, and the housing opening is provided with a baffle 502. If the outside air contains combustible gas, it is burned in the combustible gas removal device 3. After combustion, water vapor is generated. The dust removal device 5 and the cooling and dehumidifying device 7 are used to remove dust, dehumidify, and cool the gas after combustion. The dust removal device 5 can also be located at the inlet of the air pump 2. The cooling and dehumidifying device 7 can be connected to an external cold source to achieve the effect of condensation and dehumidification. The baffle 502 allows the filter element 501 to be replaced.

[0020] The combustible gas removal device 3 includes an explosion-proof combustion chamber 31 and an ignition device 34 installed in the explosion-proof combustion chamber 31. By igniting the gas in the explosion-proof combustion chamber 31, the combustible gas is ignited in advance to cause combustion or explosion, thereby eliminating the combustible gas. The air pump 2 is provided with an intake port 201 extending to the outside of the protective housing 1, and a pressure relief valve 202 is provided at the outlet end of the air pump 2.

[0021] An air inlet end 32 and an exhaust end 33 are provided on the surface of the explosion-proof combustion chamber 31. A valve block 37 is provided in both the air inlet end 32 and the exhaust end 33. A valve plate 36 is provided at one end of the valve block 37 extending into the explosion-proof combustion chamber 31. The two valve plates 36 open in opposite directions through a transmission mechanism. A first side groove 38 is provided on the surface of the valve block 37 of the air inlet end 32 along the axis parallel direction. A second side groove 39 is provided on the surface of the valve block 37 of the exhaust end 33 along the axis parallel direction. The length of the second side groove 39 is greater than that of the first side groove 38. A solenoid valve 4 is also provided on the outside of the exhaust end 33.

[0022] In this design, since the internal gas pressure of the explosion-proof combustion chamber 31 may suddenly increase during deflagration, the conventional solenoid valve may be easily damaged by the continuous impact. Therefore, this invention uses a valve plate 36 to resist the impact, and the valve plates 36 open in opposite directions. After deflagration occurs in the explosion-proof combustion chamber 31, when there is high-temperature and high-pressure gas inside, the air pump 2 increases the pressure, pushing the valve plate 36 at the inlet end 32 to slide, thereby opening the valve plate 36 at the exhaust end 33. Figure 3-6As shown, due to the short length of the first side groove 37, the valve block 37 of the air inlet end 32 will not open due to slight sliding. The air pressure inside the air inlet end 32 will continuously push against the valve block 37. The valve block 37 of the exhaust end 33 opens earlier, and the high-pressure gas in the explosion-proof combustion chamber 31 is discharged from the exhaust end 33 and enters the protective chamber. When the valve block 37 of the air inlet end 32 is fully opened, the solenoid valve 4 closes. Although the gas pressure in the air inlet end 32 is higher, the space becomes larger after entering the explosion-proof combustion chamber 31, and the pressure drops sharply, so it will not impact the solenoid valve 4. The air pump 2 continuously pumps new air into the explosion-proof combustion chamber 31 and reaches a certain air pressure. This air pressure is greater than the standard atmospheric pressure. Then, the pressure relief valve 202 is opened, and the valve plate 36 is closed by the pressure difference for the next round of ignition. The purpose of the pressure being greater than the standard atmospheric pressure is that when there is no combustible gas in the air, the explosion-proof combustion chamber 31 will not burn. Without high-temperature and high-pressure gas, after the exhaust end 33 is opened, the atmospheric pressure can still discharge the gas to the protective chamber 101.

[0023] The explosion-proof combustion chamber 31 is spherical, and its inner wall has two grooves 35 with spherical curved surfaces. The valve plate 36 is a spherical plate that matches the shape of the grooves 35. This shape improves the explosion-proof effect.

[0024] The transmission mechanism includes a fixed part 310 installed in the explosion-proof combustion chamber 31, a gear 311 installed on the fixed part 310, and a rack 312 installed on two valve plates 36. The two racks 312 mesh with the two sides of the gear 311 respectively. This solution specifically proposes a structure in which the two valve plates are opened in conjunction.

[0025] The protective enclosure 1 is also equipped with an exhaust device 6, which includes a multi-way valve 61, exhaust ports 63 located at multiple points in the protective chamber 101, and an extension pipe 62 leading the exhaust ports 63 to the multi-way valve 61. Multiple inlets of the multi-way valve 61 are connected to the extension pipe 62, and an exhaust pipe 64 is provided at the outlet. The multi-way valve 61 is used to switch the exhaust ports 63 to reduce exhaust dead zones. This solution allows the airflow to cover more areas by setting the multi-way valve 61 to cyclically open different exhaust ports 63, which is beneficial to improving the air replacement effect in the protective chamber 101.

[0026] To implement the above-mentioned protection device, the present invention also proposes a protection method based on any of the above-mentioned lubrication protection devices, comprising the following steps: S1: The concentration of combustible gas in the protective chamber 101 is detected by the concentration sensor 103. When the concentration reaches the warning value, the air pump 2 is controlled to start to ventilate the protective chamber 101. S2: External gas is pumped into the combustible gas removal device 3 by the air pump 2 for ignition and combustion, eliminating combustible gas in the external gas. The combusted gas is then pumped into the air post-treatment component for dehumidification, dust removal and cooling, and then pumped into the protective chamber 101 to squeeze out the combustible gas, preventing deflagration caused by sparks generated by electronic components.

[0027] Detailed implementation: The protective chamber 101 is in a sealed state. The concentration of combustible gas in the protective chamber 101 is detected by the concentration sensor 103. When the concentration reaches the warning value, the air pump 2 is turned on to provide ventilation protection. Specifically, the air pump 2 pumps outside air into the combustible gas removal device 3. Then the combustible gas removal device 3 is turned off and ignited to eliminate any possible combustible gas. The gas is then passed into an air post-processing device for treatment and finally into the protective chamber 101. After the air pressure in the protective chamber 101 increases, the exhaust device 6 is turned on to discharge the gas and provide ventilation, thereby reducing the concentration of combustible gas in the protective chamber 101 to prevent deflagration and explosion.

[0028] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A protection device for the starter box of a lubricating oil pre-supply pump, characterized in that, The device includes a protective enclosure (1), which contains a protective chamber (101) for installing a starter box and an air handling chamber (102). The air handling chamber (102) contains an air pump (2), a combustible gas removal device (3), and an air post-treatment component. The protective chamber (101) contains a concentration sensor (103) for detecting the concentration of combustible gas, which controls the air pump (2) to introduce treated air when the concentration of combustible gas in the protective chamber (101) reaches a warning value.

2. The protection device for the starter box of a lubricating oil pre-supply pump according to claim 1, characterized in that, The air aftertreatment assembly includes a dust removal device (5) located at the outlet of the combustible gas removal device (3) and a cooling and dehumidification device (7). The dust removal device (5) includes a housing and a filter element (501). The housing extends to the outside of the air treatment chamber (102), and the housing opening is provided with a baffle (502).

3. The protection device for the starter box of a lubricating oil pre-supply pump according to claim 1, characterized in that, The combustible gas removal device (3) includes an explosion-proof combustion chamber (31) and an ignition device (34) installed in the explosion-proof combustion chamber (31).

4. The protection device for the starter box of a lubricating oil pre-supply pump according to claim 3, characterized in that, The explosion-proof combustion chamber (31) has an air inlet (32) and an exhaust (33) extending outward from its surface. Both the air inlet (32) and the exhaust (33) are provided with valve blocks (37). The valve blocks (37) are provided with valve plates (36) at one end extending into the explosion-proof combustion chamber (31). The two valve plates (36) are opened in opposite directions by a transmission mechanism. The surface of the valve block (37) of the air inlet (32) is provided with a first side groove (38) in the direction parallel to the axis, and the surface of the valve block (37) of the exhaust (33) is provided with a second side groove (39) in the direction parallel to the axis. The length of the second side groove (39) is greater than that of the first side groove (38). A solenoid valve (4) is also provided outside the exhaust (33).

5. The protection device for the starter box of a lubricating oil pre-supply pump according to claim 4, characterized in that, The explosion-proof combustion chamber (31) is spherical, and its inner wall has two grooves (35) with spherical curved surfaces. The valve plate (36) is a spherical plate that matches the shape of the grooves (35).

6. The protection device for the starter box of a lubricating oil pre-supply pump according to claim 4, characterized in that, The transmission mechanism includes a fixed part (310) disposed in the explosion-proof combustion chamber (31), a gear (311) disposed on the fixed part (310), and a rack (312) disposed on two valve plates (36), wherein the two racks (312) respectively mesh with the two sides of the gear (311).

7. The protection device for the starter box of a lubricating oil pre-supply pump according to claim 6, characterized in that, The air pump (2) is provided with an inlet (201) extending to the outside of the protective housing (1), and the outlet end of the air pump (2) is provided with a pressure relief valve (202).

8. The protection device for the starter box of a lubricating oil pre-supply pump according to claim 1, characterized in that, The protective enclosure (1) is also equipped with an exhaust device (6). The exhaust device (6) includes a multi-way valve (61), exhaust ports (63) located at multiple points in the protective chamber (101), and an extension pipe (62) leading the exhaust ports (63) to the multi-way valve (61). Multiple inlets of the multi-way valve (61) are connected to the extension pipe (62), and an outlet is provided with a discharge pipe (64). The multi-way valve (61) is used to switch the exhaust ports (63) to reduce exhaust dead zones.

9. A protection method for a protection device based on the lubricating oil pre-supply pump starter box according to any one of claims 1-8, characterized in that, Includes the following steps: S1: The concentration of combustible gas in the protective room (101) is detected by the concentration sensor (103). When the concentration reaches the warning value, the air pump (2) is started to ventilate the protective room (101). S2: External gas is pumped into the combustible gas removal device (3) by the air pump (2) for ignition and combustion to eliminate combustible gas in the external gas. The gas after combustion is pumped into the air post-treatment component for dehumidification, dust removal and cooling. Then it is pumped into the protective chamber (101) to squeeze out the combustible gas and prevent the sparks generated by the electronic components from causing deflagration.

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