Screw pump

Abstract

The utility model relates to a screw pump which comprises a driving device, a screw and a pump body, a screw cavity is arranged in the pump body, a first end of the pump body is provided with a liquid suction port communicated with the screw cavity, a second end of the pump body is provided with a rotating shaft hole communicated with the screw cavity, and the side wall, close to the second end, of the pump body is provided with a liquid outlet communicated with the screw cavity. The screw rod is arranged in the screw cavity and penetrates through the rotating shaft hole to be connected with the driving device; the liquid inlet shell comprises a barrel and a bottom wall, the lower end of the barrel is connected with the bottom wall, the first end of the pump body is inserted into the barrel from the upper end of the barrel, the upper end of the barrel is connected with the outer wall face of the pump body, a first channel is formed between the first end of the pump body and the bottom wall, and a second channel is formed between the inner wall face of the barrel and the outer wall face of the pump body; the barrel is provided with a liquid inlet, the liquid suction port, the first channel, the second channel and the liquid inlet are sequentially communicated, and the liquid inlet is connected with an oil suction pipe through an oil inlet hose. The operation is simple, and a single person can complete barrel changing operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to technical pump equipment field especially relates to a screw pump. BACKGROUND

[0002] When producing food and medicine, the raw material oil in the oil drum is usually extracted by screw pump directly inserted into the barrel, the bottom of the pump pipe is in contact with the bottom of the barrel, the outlet of the screw pump is connected with the filter or the container, the motor of the screw pump is started, the oil in the oil drum is extracted into the pump pipe under the action of the screw pump rotor, and then is pressed out from the pump pipe outlet into the filter or the container. When an oil drum is emptied, another oil drum is inserted for oil extraction. The screw pump is heavy, the insertion and extraction stroke is large each time, and the operation is difficult. Meanwhile, the screw pump cannot be used for the oil drum with small barrel opening. After production is completed, the screw pump of the prior art cannot be stored by nitrogen after use, and must be cleaned each time after use, and then stored in an oxygen-free environment. When the screw pump of the prior art is cleaned, the outer surface of the screw pump is cleaned first, and then the screw pump is placed in a cleaning barrel to start the screw pump to clean the inner surface of the pump pipe. Cleaning agents and injection water are used alternately during the cleaning process.

[0003] Therefore, there is an urgent need for a screw pump to solve the above technical problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a screw pump to solve the problem of difficult insertion and extraction operation of the screw pump.

[0005] To achieve the above object, the utility model provides a screw pump, which comprises a driving device, a screw and a pump body. The pump body is internally provided with a screw cavity. The first end of the pump body is provided with a liquid suction port in communication with the screw cavity. The second end of the pump body is provided with a rotating shaft hole in communication with the screw cavity. The side wall of the pump body close to the second end is provided with a liquid outlet port in communication with the screw cavity. The screw is arranged in the screw cavity and connected with the driving device through the rotating shaft hole. The utility model further comprises a liquid inlet shell and an oil suction pipe. The liquid inlet shell comprises a cylinder body and a bottom wall. The lower end of the cylinder body is connected with the bottom wall. The first end of the pump body is inserted into the cylinder body from the upper end of the cylinder body. The upper end of the cylinder body is connected with the outer wall surface of the pump body. The first end of the pump body and the bottom wall form a first channel. The inner wall surface of the cylinder body and the outer wall surface of the pump body form a second channel. The cylinder body is provided with a liquid inlet port. The liquid suction port, the first channel, the second channel and the liquid inlet port are sequentially communicated. The liquid inlet port is connected with the oil suction pipe through an oil inlet hose.

[0006] Preferably, the liquid inlet port is close to the upper end of the cylinder body.

[0007] As preferred, the driving device comprises a motor and a speed reducer, and the motor is connected with the screw rod through the speed reducer.

[0008] As preferred, the oil suction pipe, the pump body, the screw rod and the liquid inlet shell are made of food-grade stainless steel.

[0009] As preferred, the second end of the pump body is provided with a sealing cover, and the rotating shaft hole is arranged on the sealing cover.

[0010] As preferred, the screw rod comprises a rotating shaft and helical blades connected to the surface of the rotating shaft, and the rotating shaft is connected with the driving device through the rotating shaft hole.

[0011] As preferred, the helical blades have an inclination angle of 30°-40°.

[0012] As preferred, the lower end of the oil suction pipe is provided with a one-way ball valve.

[0013] As preferred, the oil inlet hose is a tetrafluoroethylene pressure-resistant pipe.

[0014] As can be seen from the above, when the oil in one oil drum is pumped out, the oil suction pipe only needs to be inserted into another oil drum, and the operation is simple and can be completed by one person. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a sectional view of an embodiment of the screw pump of the utility model;

[0016] Figure 2 is a sectional view of the pump shell and the liquid inlet shell of an embodiment of the screw pump of the utility model;

[0017] Figure 3 is a schematic diagram of oil pumping of an embodiment of the screw pump of the utility model;

[0018] Figure 4 is a schematic diagram of cleaning of an embodiment of the screw pump of the utility model.

[0019] In the drawings:

[0020] 1, oil drum; 2, cleaning system;

[0021] 100, driving device; 110, motor; 120, speed reducer;

[0022] 200, screw rod; 210, rotating shaft; 220, helical blade;

[0023] 300, pump shell; 301, screw cavity; 310, first end; 311, liquid suction port; 320, second end; 321, rotating shaft hole; 322, sealing cover; 330, liquid outlet;

[0024] 400, liquid inlet shell; 410, cylinder; 420, bottom wall; 401, first channel; 402, second channel; 411, liquid inlet;

[0025] 500, oil suction pipe; 600, oil inlet hose; 700, oil outlet hose. DETAILED DESCRIPTION

[0026] The technical solutions of the present application will be further described below in conjunction with the drawings and specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, and not to limit the present application. In addition, it should be noted that, in order to facilitate the description, only the parts related to the present application are shown in the drawings, not all.

[0027] In the present application, some orientation words are limited, and unless the opposite is stated, the orientation words such as "up", "down", "left", "right", "in", "out" are used for easy understanding, and thus do not constitute a limitation on the scope of protection of the present application.

[0028] In the present application, unless otherwise specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical direction of the first feature above and oblique above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical direction of the first feature below and oblique below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0029] In the description of the present application, unless otherwise specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] As Figure 1 and 2As shown, the embodiment provides a screw pump, comprising: a driving device 100, a screw 200 and a pump body 300, the pump body 300 is internally provided with a screw cavity 301, a first end 310 of the pump body 300 is provided with a liquid suction port 311 in communication with the screw cavity 301, a second end 320 of the pump body 300 is provided with a rotating shaft hole 321 in communication with the screw cavity 301. A side wall of the pump body 300 close to the second end 320 is provided with a liquid outlet 330 in communication with the screw cavity 301, the screw 200 is arranged in the screw cavity 301 and connected with the driving device 100 through the rotating shaft hole 321, and the driving device 100 is used for driving the screw 200 to rotate.

[0031] The screw pump further comprises a liquid inlet shell 400 and an oil suction pipe 500, the liquid inlet shell 400 comprises a cylinder body 410 and a bottom wall 420, the lower end of the cylinder body 410 is connected with the bottom wall 420, the first end 310 of the pump body 300 is inserted into the cylinder body 410 from the upper end of the cylinder body 410, the upper end of the cylinder body 410 is connected with the outer wall surface of the pump body 300, the first end 310 of the pump body 300 and the bottom wall 420 form a first channel 401, the inner wall surface of the cylinder body 410 and the outer wall surface of the pump body 300 form a second channel 402, the cylinder body 410 is provided with a liquid inlet port 411, the liquid suction port 311, the first channel 401, the second channel 402 and the liquid inlet port 411 are sequentially communicated, and the liquid inlet port 411 is connected with the oil suction pipe 500 through an oil inlet hose 600.

[0032] The screw pump of the utility model adds the liquid inlet shell 400 outside the pump shell 300, the liquid inlet shell 400 and the pump shell 300 form the first channel 401, the second channel 402, and the liquid inlet port 411 is connected with the oil suction pipe 500 through the oil inlet hose 600. Figure 3 As shown, in use, the oil suction pipe 500 is used for being inserted into the oil drum 1, the driving device 100 is opened to drive the screw 200 to rotate, the oil suction pipe generates negative pressure, the oil enters the second channel 402 from the oil suction pipe 500, the oil inlet hose 600 and the liquid inlet port 411, and then flows out from the liquid outlet 331 through the first channel 401 and the screw cavity 301. The liquid outlet 331 is connected with an oil outlet hose 700 and is used for supplying the oil to a required position. Preferably, a filter is arranged behind the oil outlet hose 700 to filter out impurities in the oil.

[0033] When the oil in one oil drum is pumped out, the oil suction pipe 500 is only inserted into another oil drum, the operation is simple, and the single person can complete the operation of changing the drum. The oil suction pipe 500 can be selected to have a suitable size according to the barrel opening of the oil drum 1 and can be applied to any size of barrel opening. The screw pump is fixed at a position and does not need to be carried every time the oil drum 1 is replaced. After the oil in one oil drum 1 is pumped out, the oil suction pipe 500 is inserted into another oil drum 1 to pump oil. After production is completed, the oil suction pipe 500 is removed, nitrogen or helium is filled, and the port of the oil inlet hose 600 is sealed to store the screw pump in an oxygen-free manner. Within the effective period, the screw pump can be directly used without cleaning the screw pump.

[0034] As Figure 4 shown, when the screw pump needs to be cleaned, only the inlet end of the oil inlet hose 600 is connected with the outlet of the cleaning system 2, and the outlet end of the screw pump is connected with the backwater inlet of the cleaning system 2 by the oil inlet hose, so that the first channel 401 and the second channel 402 are cleaned by the cleaning system 2, without complicated manual cleaning. Since the oil suction pipe 500 is light, it is convenient to clean.

[0035] The liquid inlet 411 is close to the upper end of the cylinder 410, and when the screw pump is cleaned, the entire second channel 402 can be cleaned, preventing residual liquid.

[0036] The driving device 100 includes a motor 110 and a speed reducer 120, and the motor 110 is connected with the screw 200 through the speed reducer 120. The motor 110 cannot be directly connected with the screw 200, and needs to reduce the rotating speed of the motor 110 to a suitable rotating speed through the speed reducer 120.

[0037] The oil suction pipe 500, the pump body 300, the screw 200 and the liquid inlet shell 400 are all made of food-grade stainless steel, such as 304 and 316 stainless steel. The oil inlet hose 600 is made of food-grade plastic, such as polytetrafluoroethylene.

[0038] The second end 320 of the pump body 300 is provided with a sealing cover 322, and the rotating shaft hole 321 is arranged in the sealing cover 322.

[0039] The screw 200 includes a rotating shaft 210 and a helical blade 220 connected to the surface of the rotating shaft 210, and the rotating shaft 210 penetrates through the rotating shaft hole 321 and is connected with the driving device 100. As Figure 1 shown, the rotating shaft 210 penetrates through the rotating shaft hole 321 of the sealing cover 322 and is connected with the speed reducer 120, and the motor 110 and the speed reducer 120 drive the rotating shaft 210 to rotate.

[0040] Preferably, the inclination angle of the helical blade 220 is 30°-40°, such as 30°, 33°, 36° or 40°. The pumping efficiency is higher.

[0041] The lower end of the oil suction pipe 500 is provided with a one-way ball valve (not shown in the figure), and the one-way ball valve can reduce the residual raw oil in the oil tank 1.

[0042] Although the utility model has been described in detail above by general description, specific embodiments and tests, some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the utility model all belong to the scope of protection required by the utility model.

Claims

1. A progressing cavity pump comprising: The utility model discloses a driving device, screw rod and pump body, the screw cavity is equipped inside the pump body, the first end of pump body is equipped with with the screw cavity intercommunication liquid suction mouth, the second end of pump body is equipped with with the screw cavity intercommunication rotating shaft hole, the lateral wall of pump body is close to the second end is equipped with with the screw cavity intercommunication liquid outlet, the screw rod is located in the screw cavity and passes through rotating shaft hole and is connected with driving device, its characterized in that, still include liquid inlet shell and oil suction pipe, the liquid inlet shell includes cylinder and bottom wall, the lower end of cylinder is connected with bottom wall, the first end of pump body is inserted into the cylinder from the upper end of cylinder, the upper end of cylinder is connected with the outer wall surface of pump body, the first channel is formed between the first end of pump body and bottom wall, the second channel is formed between the inner wall surface of cylinder and the outer wall surface of pump body, the cylinder is equipped with liquid inlet, liquid suction mouth, first channel, second channel and liquid inlet communicate sequentially, liquid inlet is connected with oil suction pipe through oil inlet hose.

2. The screw pump of claim 1, wherein The liquid inlet is close to the upper end of the cylinder.

3. The screw pump of claim 1, wherein The driving device includes a motor and a speed reducer, and the motor is connected with the screw rod through the speed reducer.

4. The screw pump of claim 1, wherein The oil suction pipe, the pump body, the screw rod and the liquid inlet shell are all made of food-grade stainless steel.

5. The screw pump of claim 1, wherein, The second end of the pump body is provided with a sealing cover, and the rotating shaft hole is arranged in the sealing cover.

6. The screw pump of claim 1, wherein, The screw rod includes a rotating shaft and a helical blade connected to the surface of the rotating shaft, and the rotating shaft passes through the rotating shaft hole and is connected with the driving device.

7. The screw pump of claim 6, wherein The inclination angle of the helical blade is 30°-40°.

8. The screw pump of claim 1, wherein, The lower end of the oil suction pipe is provided with a one-way ball valve.

9. The screw pump of claim 1, wherein, The oil inlet hose is a tetrafluoroethylene pressure-resistant pipe.

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