Spiral recovery device for bottom oil of storage tank

Abstract

The utility model discloses a storage tank bottom oil spiral recovery device which comprises an oil guide shell, a power source, a spiral suction mechanism and a moving mechanism. The spiral suction mechanism is rotationally arranged in the oil guide shell, an output shaft of the power source is connected with the spiral suction mechanism, the moving mechanism is arranged on the lower end face of the oil guide shell, and the oil guide shell is provided with an oil guide inlet and an oil guide outlet. Due to the design of the moving mechanism at the bottom, the device can freely move at the bottom of the oil tank, part of corners can be conveniently cleaned, and crude oil at all positions of the bottom of the oil tank can be effectively recycled.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil and gas storage and transportation technical field, concretely is a kind of storage tank bottom oil spiral recovery device. BACKGROUND

[0002] In the oil and gas industry, oil storage tank needs to be cleaned and maintained when it reaches the operating life. Due to long-term operation, a large amount of heavy crude oil, polymer and sludge is accumulated at the bottom of the tank. When cleaning this part, the oil transfer pump needs to be placed inside the thick oil to collect, but due to the high viscosity and high impurity of the crude oil in this part, the oil transfer pump cannot operate normally, and the staff needs to enter the inside for manual cleaning, causing a lot of workload and safety risk.

[0003] The existing technology has the following problems:

[0004] 1. Oil transfer pump recovery: due to the accumulation of heavy crude oil at the bottom of the tank for many years, the flowability is very poor, and the recovery amount is very small, which is maintained at 1.2m 3 / h, the efficiency is very low, resulting in long construction period and high cost.

[0005] 2. Treatment of tank bottom crude oil after mixing with thin oil: hot water or diesel oil is injected into the tank bottom to reduce the viscosity of the crude oil, and the oil transfer pump is used for recovery, but this method will cause the accumulation of oil and gas in the sealed space of the tank to increase, which cannot be discharged quickly, and the risk is very high, which is easy to cause fire and explosion accidents, and is not suitable for use.

[0006] 3. Manual cleaning by staff: this work is carried out when the liquid level of the crude oil storage tank is lowered to the lowest position, and the height of the internal operating space is only 1.5m, which makes it very difficult for the construction personnel to operate; at the same time, the internal space is airtight and contains a large amount of toxic and harmful gas, so the personnel need to wear positive pressure respirators for operation, which is heavy and difficult to work.

[0007] 4. Cannot work when the environmental temperature is low: when the temperature gradually decreases in winter, there is no any insulation measure inside and outside the storage tank due to the influence of construction work, when the environmental temperature is as low as zero, the crude oil at the bottom of the tank begins to freeze, which causes the oil transfer pump to be unable to work normally, and manual cleaning operation is also very inconvenient, so the construction can only be suspended, resulting in the extension of the construction period and the influence on the production and operation of the station.

[0008] Taking the cleaning of 6# tank in a certain oil depot as an example, during the construction period, the oil transfer pump is mainly used for cleaning, due to the high impurity inside, the filter screen and the inlet section will be blocked after short-term operation, which causes the oil transfer pump to be unable to operate. At the same time, the recovery amount is very low, which is maintained at 1.2m 3The liquid level was reduced to 0.5m after 40 days of cleaning by using the oil barge pump, and the oil barge pump could not be used for cleaning any more, and manual cleaning was needed. 8 construction workers were used to enter and implement manual cleaning, and the construction time was 30 minutes after each entering to ensure safe construction, which caused extremely slow construction, and the duration was 35 days. The total construction period was 75 days, 28 people were invested, and the efficiency was extremely low. The normal operation of the oil station was also seriously affected.

[0009] Publication No. CN203076298U discloses a high-viscosity sludge dredging device, which comprises a driving device and a transmission shaft. One end of the transmission shaft is located in a storage tank and is supported by a fixed support, and the other end is located outside the storage tank and is connected with the driving device and supported by a telescopic support. A spiral blade is fixed on the transmission shaft.

[0010] The prior art has the problem of not being easy to move when applied to oil tank bottom oil sample recovery.

[0011] Publication No. CN105501717B discloses a tank bottom automatic pollution discharge system, which comprises an in-tank pollution suction device and an out-tank pollution discharge device connected by a pollution discharge pipe. The in-tank pollution suction device drives a rotating disc through a driving mechanism. A plurality of pollution suction pipes are arranged on the rotating disc. The rotating disc and the pollution suction pipes rotate around a hollow column as the center. A strong negative pressure suction force is generated by a pollution suction pump of the out-tank pollution discharge device. The pollution suction pipes suck and transport the pollutants into a column sleeve type collection cavity, and then discharge the pollutants from the out-tank pollution discharge device through the pollution discharge pipe.

[0012] The prior art needs to be modified and constructed on the existing oil tank, which is high in cost and not easy to popularize.

[0013] Publication No. CN221808832U discloses a coal tar tank cleaning device, which comprises a storage shell. A water suction ring is fixedly connected to the lower end of the storage shell. A one-way pipe is fixedly connected to the inner side of the lower end of the water suction ring. A water suction ring is slidably connected to the inner side of the water suction ring. A water suction pump is fixed to the inner side of the water suction ring. The output end of the water suction pump is fixedly connected and penetrates a communication pipe. The steel brush rotates to clean the tank bottom by rotating the stirring gear driven by the stirring motor. The cleaning agent is sprayed from the nozzle by rotating the eccentric disc driven by the lifting motor, extruding the storage shell inside through the infusion pipe and being pushed by the extruding ring. The lifting frame is lifted at the same time to drive the water suction ring to slide, so that the one-way pipe generates suction to absorb the liquid generated by cleaning into the inner side of the water suction ring, achieving the effect of rotating the brush to clean the tank bottom and absorbing the liquid.

[0014] The prior art needs to be modified and constructed on the existing oil tank, which is high in cost and not easy to popularize.

[0015] In summary, the technical solutions of the above disclosed technologies, the technical problems to be solved and the beneficial effects generated are all different from the utility model, and the above disclosed technical documents do not have technical inspiration for more technical features and the technical problems to be solved and the beneficial effects of the utility model. Utility model content

[0016] In view of the above defects existing in the prior art, the utility model aims at providing a storage tank bottom oil spiral recovery device.

[0017] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0018] A storage tank bottom oil spiral recovery device, comprising an oil guide shell, a power source, a spiral suction mechanism, further comprising a moving mechanism, the spiral suction mechanism is rotationally arranged in the oil guide shell, the output shaft of the power source is connected with the spiral suction mechanism, the moving mechanism is arranged on the lower end surface of the oil guide shell, and the oil guide shell is provided with an oil guide inlet and an oil guide outlet.

[0019] Further, the oil guide shell comprises an oil guide side plate and an oil guide panel, the oil guide side plate is provided with at least three, and the outer end surface of one of the oil guide side plates is connected with the moving mechanism.

[0020] Specifically, the at least three oil guide side plates are combined to form an oil guide shell, and the front end and the rear end of the oil guide shell are connected with the oil guide panel.

[0021] Specifically, the spiral suction mechanism is rotationally connected with the two oil guide panels, and the power source is connected with one oil guide panel.

[0022] Specifically, the oil guide inlet is arranged at one end of the oil guide shell away from the power source, and the oil guide outlet is arranged at one end of the oil guide shell close to the power source.

[0023] Further, at least one oil guide side plate is provided with an oil guide inlet at one end away from the power source, and the oil guide panel connected with the power source is provided with an oil guide outlet.

[0024] Further, all the oil guide side plates are provided with an oil guide inlet at one end away from the power source, the oil guide side plate provided with the moving mechanism is connected with an extension pipe at the oil guide inlet, and the extension pipe can be in contact with the tank bottom; and the oil guide outlet is close to the moving mechanism.

[0025] Further, the moving mechanism comprises a guide wheel, and the guide wheel is connected with the outer end surface of one oil guide side plate.

[0026] Further, the guide wheel is a spherical roller.

[0027] Further, the spiral suction mechanism comprises a spiral shaft and a spiral blade.

[0028] Specifically, the spiral blade is connected to the outer wall of the spiral shaft, the spiral shaft is rotationally connected to the oil guide panel, and the spiral shaft is connected to the output shaft of the power source.

[0029] Further, the power source comprises a hydraulic pump and a force amplification transmission mechanism.

[0030] Specifically, the output shaft of the hydraulic pump is connected to the input shaft of the force amplification transmission mechanism, and the output shaft of the force amplification transmission mechanism is connected to the spiral shaft.

[0031] Specifically, the housing of the hydraulic pump is connected to the housing of the force amplification transmission mechanism, and the housing of the force amplification transmission mechanism is connected to one of the oil guide panels.

[0032] Further, the force amplification transmission mechanism is a planetary gear reducer.

[0033] Further, the oil guide panel away from the power source in the oil guide shell is provided with a connecting port with a plug corresponding to the oil outlet.

[0034] Specifically, it further comprises a series connection shell, the series connection shell structure is the same as the oil guide shell structure,

[0035] Specifically, the spiral suction mechanism is rotationally connected in the series connection shell, and a moving mechanism is arranged on the lower end surface of the series connection shell.

[0036] Specifically, the series connection shell is provided with connecting clamping grooves at both ends, and the oil guide shell is provided with connecting clamping grooves at one end away from the power source, and adjacent connecting clamping grooves are clamped together through buckles.

[0037] Specifically, the end of the spiral shaft is provided with a series connection blind hole, and adjacent series connection blind holes are connected through a transmission handle.

[0038] Specifically, adjacent connecting ports and oil outlets are communicated through double-head sealing insertion tubes.

[0039] Compared with the prior art, the utility model has the following beneficial effects:

[0040] 1. The utility model uses spiral blades to form a pushing force on high-viscosity crude oil, reduces the resistance influence during high-viscosity crude oil conveying, realizes the recovery of tank bottom high-viscosity crude oil, and is not affected by high-viscosity, low-flowability crude oil and is not restricted by a large amount of impurities in the crude oil, and can realize fast, large and safe crude oil recovery.

[0041] 2. The utility model uses safe and explosion-proof hydraulic power, eliminates hidden dangers such as fire explosion, and meets the on-site explosion-proof requirements.

[0042] 3. The spherical roller at the bottom is designed to make the device freely move on the tank bottom, facilitate cleaning of the part of the corner, and realize effective recovery of crude oil at each position of the tank bottom.

[0043] 4. The device can be connected in multiple sections through the buckle, transmission handle and double-head sealing insertion pipe, has certain flexibility, can be freely assembled, can be used on the tank bottom with different diameters and areas according to different sites and working conditions, and is simple to operate, and effectively reduces the operating personnel.

[0044] 5. The device is verified by on-site use, and the recovery amount reaches 8m 3 / h, which is much higher than 0.2m 3 / h recovered by the oil transfer pump or 0.1m 3 / h recovered by manual operation. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 is a structural schematic view of a tank bottom oil spiral recovery device according to the present application;

[0046] Figure 2 is a left view of a tank bottom oil spiral recovery device according to the present application embodiment 2;

[0047] Figure 3 is a connection structure schematic view of a stringing shell and an oil guide shell according to the present application embodiment 2.

[0048] In the figure: spiral blade 1; spiral shaft 2; stringing blind hole 21; spiral pitch 3; oil guide shell 4; oil guide side plate 41; oil guide faceplate 42; power source 5; hydraulic pump 51; force amplification transmission mechanism 52; connection clamping groove 6; bearing 7; oil guide inlet 8; oil guide outlet 9; guide wheel 10; connection port 11; U-shaped buckle 12; transmission handle 13; double-head sealing insertion pipe 14. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0050] Embodiment 1:

[0051] Please refer to Figure 1The embodiment provides a kind of tank bottom oil spiral recovery device, including oil guide shell 4, power source 5, spiral suction mechanism, moving mechanism, the spiral suction mechanism rotation is arranged in oil guide shell 4, the output shaft of power source 5 is connected with spiral suction mechanism, the moving mechanism is arranged in the lower end surface of oil guide shell 4, the oil guide shell 4 is provided with oil guide inlet 8, oil guide outlet 9;When using, oil guide outlet 9 is connected with oil discharge pipe, and the other end of oil discharge pipe is located in the oil collection pool outside the oil storage tank, oil guide shell 4 is placed in the tank bottom of oil storage tank, and high viscosity oil product recovery is carried out, and the high viscosity oil product recovery of entire tank bottom is realized by moving oil guide shell 4.

[0052] Further, the oil guide shell 4 includes oil guide side plate 41, oil guide panel 42, the outer end surface of one of the at least three oil guide side plates 41 is connected with the moving mechanism, the at least three oil guide side plates 41 are combined to form an oil guide shell, the front end and the rear end of the oil guide shell are connected with the oil guide panel 42, the spiral suction mechanism is rotationally connected with the two oil guide panels 42, the power source 5 is connected with one of the oil guide panels 42, the oil guide inlet 8 is arranged at the end of the oil guide shell away from the power source 5, and the oil guide outlet 9 is arranged at the end of the oil guide shell close to the power source 5.

[0053] Specifically, the oil guide inlet 8 is arranged at the end of the at least one oil guide side plate 41 away from the power source 5.

[0054] Preferably, the oil guide inlets 8 are arranged at the ends of all the oil guide side plates 41 away from the power source 5 to realize rapid oil inlet recovery; the oil guide side plate 41 provided with the moving mechanism is connected with an extension pipe at the oil guide inlet 8, the extension pipe can be in contact with the tank bottom to realize more sufficient recovery.

[0055] Specifically, the oil guide panel 42 connected with the power source 5 is provided with the oil guide outlet 9, so that the pipeline end does not need to be bent at a large angle after being connected, and the oil guide outlet 9 is close to the moving mechanism, so that the oil sample in the oil guide shell 4 can be fully discharged.

[0056] Specifically, the adjacent oil guide side plates 41 and the oil guide side plate 41 and the oil guide panel 42 are connected through bolts.

[0057] Preferably, the oil guide side plates 41 are provided with four, and the oil guide shell 4 is in the shape of a rectangular body.

[0058] Further, the moving mechanism includes a guide wheel 10, and the guide wheel 10 is a spherical roller.

[0059] Preferably, four spherical rollers convenient for dismounting and mounting are mounted on the outer end surface of one of the oil guide side plates 41 through bolts.

[0060] Further, the screw suction mechanism comprises a screw shaft 2 and a screw blade 1 welded to the outer wall of the screw shaft 2, the screw shaft 2 is rotationally connected to the oil guide panel 42 through a bearing 7, and the screw shaft 2 is connected to the output shaft of the power source 5; when the output shaft of the power source 5 rotates, the screw shaft 2 is driven to rotate, and the screw blade 1 is also driven to rotate, thereby pushing the high-viscosity crude oil to move along the direction of the screw blade 1.

[0061] Specifically, the length of the screw blade 1 is determined according to the viscosity of the oil and the conveying distance, the surface of the screw blade 1 is plated with copper alloy, the screw blade 1 does not contact the oil guide side plate 41 and has a certain spacing, thereby avoiding direct contact between parts during operation and improving the safety index of the device during use; the screw blade 1 conveys the high-viscosity crude oil along the helical line direction through the rotary motion, and the helical shape generates a propelling force during the movement of the high-viscosity oil, thereby reducing the influence of the viscosity of the crude oil and a large amount of impurities on the conveying process.

[0062] Specifically, the helical pitch 3 and the number of the screw blade 1 are adjusted according to the viscosity and impurities of the oil, the helical pitch 3 represents the distance of the screw blade 1 rising or falling along the axis per revolution, different lifting distances are achieved through different helical pitches 3,

[0063] It should be noted that the adjustment rule of the parameters of the screw blade itself and the parameters of the oil is known in the art, and those skilled in the art are clear about it, so it will not be described again.

[0064] Further, the power source 5 comprises a hydraulic pump 51 and a force amplification transmission mechanism 52, the output shaft of the hydraulic pump 51 is connected to the input shaft of the force amplification transmission mechanism 52, the output shaft of the force amplification transmission mechanism 52 is connected to the screw shaft 2, and the driving pipeline of the hydraulic pump 51 is introduced from the outside of the oil tank.

[0065] Specifically, the housing of the hydraulic pump 51 and the housing of the force amplification transmission mechanism 52 are connected through bolts, and the housing of the force amplification transmission mechanism 52 and one oil guide panel 42 are connected through bolts.

[0066] Specifically, the force amplification transmission mechanism 52 is a planetary gear reducer.

[0067] Embodiment 2:

[0068] In combination Figure 2 , Figure 3 Based on the embodiment 1, in the present embodiment, the oil guide panel 42 away from the power source 5 in the oil guide shell 4 is provided with a connecting port 11 with a plug corresponding to the oil guide outlet 9.

[0069] Also included is a series connection shell, which has the same structure as the oil guide shell 4, a spiral suction mechanism is rotatably connected inside the series connection shell, a moving mechanism is arranged on the lower end surface of the series connection shell, connecting clamping grooves 6 are arranged at both ends of the series connection shell, and the oil guide shell 4 is provided with a connecting clamping groove 6 at one end away from the power source, adjacent connecting clamping grooves 6 are clamped together through a U-shaped buckle 12, and the end of the spiral shaft 2 is provided with a series connection blind hole 21, adjacent series connection blind holes 21 are connected through a transmission handle 13, so that one power source 5 drives multiple spiral shafts 2, and adjacent connecting ports 11 and oil guide outlets 9 are communicated through double-head sealing insertion pipes 14.

[0070] The U-shaped buckle 12 and the connecting clamping groove 6 can lock the oil guide shell 4 and the series connection shell, so that they are not separated during use.

[0071] Specifically, the series connection shell is provided with at least one.

[0072] Specifically, the series connection blind hole 21 is a square blind hole.

[0073] Specifically, since the recovery device needs to determine its size according to the diameter of the pipe bottom, in order to adapt to more tank bottom sizes, the series connection shell and the oil guide shell 4 are designed to have a length of 1.5 m, and are connected through the connecting clamping groove 6, the U-shaped buckle 12, the transmission handle 13, and the double-head sealing insertion pipe 14.

[0074] Embodiment 3

[0075] Based on Embodiment 2, the use method of the tank bottom oil spiral recovery device is provided, which includes the following steps:

[0076] According to the diameter of the oil tank, it is determined whether the series connection shell is needed, and when 20,000 m 3 When the tank bottom crude oil is cleaned, a three-section spiral recovery device composed of one oil guide shell 4 and two series connection shells is used, and after being connected, the three-section spiral recovery device is placed on the tank bottom.

[0077] After the hydraulic pipeline is connected, the oil guide outlet 9 is connected to the oil discharge pipe, and the end of the oil discharge pipe is placed in the oil collection pool outside the oil tank.

[0078] After the hydraulic power system is started, the hydraulic pump 51 drives the spiral shaft 2, and the spiral blade 1 starts to rotate, rapidly carrying the tank bottom crude oil outside the tank, and the calculation is about 8 m 3 / h.

[0079] The three-section spiral recovery device is moved multiple times through the guide wheel 10 to clean the entire tank bottom; the guide wheel 10 can freely move the entire device inside the tank, which is more convenient and flexible than other devices, and also effectively reduces the labor intensity.

[0080] The utility model greatly improves work efficiency, does not need personnel to enter cleaning, reduces labor intensity of staff, eliminates the security risk that personnel enters closed space to clean crude oil.

[0081] In the present application, the parts not discussed, the connection mode of each part in the present application, are all known in the art. Direct application is available, and no further description is needed.

[0082] In the present application, the term "a plurality of" refers to two or more, unless otherwise specified. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, "connecting" can be fixed connection, or detachable connection, or integrated connection; "connecting" can be direct connection, or indirect connection through intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0083] In the description of the present application, it should be understood that the terms "up", "down", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the present application.

[0084] In the description of the present application, the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0085] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A spiral recovery device for bottom oil in a storage tank, comprising an oil guide shell, a power source, and a spiral suction mechanism, characterized in that, It also includes mobile mechanisms; The spiral suction mechanism is rotatably mounted inside the oil guide housing. The output shaft of the power source is connected to the spiral suction mechanism. The moving mechanism is located on the lower end face of the oil guide housing. The oil guide housing is provided with an oil guide inlet and an oil guide outlet. The oil guide housing includes an oil guide side plate and an oil guide panel. At least three oil guide side plates are provided, and the outer end face of one of the oil guide side plates is connected to a moving mechanism. At least three oil-guiding side plates are assembled to form an oil-guiding shell, and the front and rear ends of the oil-guiding shell are connected to oil-guiding panels; The spiral suction mechanism is rotatably connected to two oil guide panels, and the power source is connected to one oil guide panel. The oil guide housing has an oil inlet at the end furthest from the power source and an oil outlet at the end closest to the power source. At least one oil guide side plate is provided with an oil guide inlet at the end away from the power source; the oil guide panel connected to the power source is provided with an oil guide outlet; The moving mechanism includes a guide wheel, which is connected to the outer end face of an oil guide side plate; The spiral suction mechanism includes a spiral shaft and spiral blades; The spiral blades are connected to the outer wall of the spiral shaft, the spiral shaft is rotatably connected to the oil guide panel, and the spiral shaft is connected to the output shaft of the power source.

2. The tank bottom oil spiral recovery device according to claim 1, characterized in that, All oil guide side plates are provided with oil guide inlets at the end away from the power source. The oil guide side plates with the moving mechanism are connected to extension pipes at their oil guide inlets, and the extension pipes can contact the bottom of the tank. The oil guide outlets are located near the moving mechanism.

3. The tank bottom oil spiral recovery device according to claim 1, characterized in that, The guide wheel is a spherical roller.

4. The tank bottom oil spiral recovery device according to claim 1, characterized in that, The power source includes a hydraulic pump and a power amplification transmission mechanism; The output shaft of the hydraulic pump is connected to the input shaft of the force-amplifying transmission mechanism, and the output shaft of the force-amplifying transmission mechanism is connected to the screw shaft. The housing of the hydraulic pump is connected to the housing of the power amplification transmission mechanism, and the housing of the power amplification transmission mechanism is connected to an oil guide panel.

5. The tank bottom oil spiral recovery device according to claim 4, characterized in that, The power amplification transmission mechanism is a planetary gear reducer.

6. The tank bottom oil spiral recovery device according to claim 1, characterized in that, The oil guide panel in the oil guide housing, which is far from the power source, is provided with a connection port with a plug corresponding to the oil guide outlet. It also includes a series-connected shell, the structure of which is the same as that of the oil guide shell. A spiral suction mechanism is rotatably connected inside the serial housing, and a moving mechanism is provided on the lower end face of the serial housing. The series shell is provided with connecting slots at both ends, and the oil guide shell is provided with a connecting slot at the end away from the power source. Adjacent connecting slots are connected together by snap-fit. The end of the spiral shaft is provided with a series blind hole, and adjacent series blind holes are connected by a transmission handle. The adjacent connection port and the oil outlet are connected by a double-ended sealed tube.

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