阅读说明：本技术 一种深海微生物原位过滤专用定量泵 (Special constant delivery pump for deep-sea microorganism in-situ filtration ) 是由 陈家旺 何巍涛 王玉红 肖婧 王豪 黄越 孙瑜霞 于 2019-08-19 设计创作，主要内容包括：本发明涉及一种泵,尤其是涉及一种深海微生物原位过滤专用定量泵。包括泵体和底座；底座端面上相对设有前保持架和后保持架,前保持架和后保持架顶端与底端通过相互平行的直线导杆与往复丝杠相连；导杆滑块安装在直线导杆上,丝杠滑块安装在往复丝杠上,导杆滑块和丝杠滑块通过滑块固定架连结为一体；往复丝杠末端通过键槽与电机相连；泵体后侧通过泵体紧固块固定在前保持架上,泵体内设有活塞,活塞后端开有盲孔并与连杆一端相连；连杆另一端与滑块固定架相连。本发明,可以实现低流量下的长时间工作；相比于传统离心泵的叶轮机构,对电机输出轴转速的需求也更低；相比于传统柱塞泵的凸轮机构,更为稳定可靠。(The invention relates to a pump, in particular to a special quantitative pump for in-situ filtration of deep-sea microorganisms. Comprises a pump body and a base; the end surface of the base is oppositely provided with a front retainer and a rear retainer, and the top ends and the bottom ends of the front retainer and the rear retainer are connected with a reciprocating screw rod through linear guide rods which are parallel to each other; the guide rod sliding block is arranged on the linear guide rod, the screw rod sliding block is arranged on the reciprocating screw rod, and the guide rod sliding block and the screw rod sliding block are connected into a whole through a sliding block fixing frame; the tail end of the reciprocating screw rod is connected with the motor through a key slot; the rear side of the pump body is fixed on the front retainer through a pump body fastening block, a piston is arranged in the pump body, and the rear end of the piston is provided with a blind hole and is connected with one end of a connecting rod; the other end of the connecting rod is connected with the sliding block fixing frame. The invention can realize long-time work under low flow; compared with an impeller mechanism of a traditional centrifugal pump, the requirement on the rotating speed of the output shaft of the motor is lower; compared with the cam mechanism of the traditional plunger pump, the cam mechanism is more stable and reliable.)

1. A special dosing pump for deep sea microorganism in-situ filtration comprises a pump body; the device is characterized by also comprising a base, an outlet one-way valve, an inlet one-way valve, a reciprocating lead screw and a guide rod sliding block;

The end face of the base is oppositely provided with a front retainer and a rear retainer, and the top ends and the bottom ends of the front retainer and the rear retainer are connected with a reciprocating screw rod through linear guide rods which are parallel to each other; the guide rod sliding block is arranged on the linear guide rod, the screw rod sliding block is arranged on the reciprocating screw rod, and the guide rod sliding block and the screw rod sliding block are connected into a whole through a sliding block fixing frame; the tail end of the reciprocating screw rod is connected with the motor through a key slot;

The rear side of the pump body is fixed on the front retainer through a pump body fastening block; the pump body is in a long cylindrical shape, the front end of the pump body is provided with an end cover, the rear end of the pump body is provided with an opening, the end cover is provided with a through hole, and an inlet check valve and an outlet check valve are arranged in the through hole; a piston is arranged in the pump body, and the rear end of the piston is provided with a blind hole and is connected with one end of a connecting rod; the other end of the connecting rod is connected with the sliding block fixing frame.

2. Dosing pump according to claim 1, characterized in that the sealing between the end cap and the pump body is performed by means of an O-ring; and an O-shaped ring is adopted between the piston and the inner surface of the pump body for sealing.

3. dosing pump according to claim 1, characterized in that the pump body front side is fixed to a pump body mount by means of a U-shaped hoop, which is fixed to the base by means of countersunk bolts.

4. Dosing pump of claim 1, wherein the inlet and outlet check valves are mounted in opposite directions.

5. Dosing pump according to claim 1, characterized in that the one-way valve is an external through one-way valve; the one-way valve and the end cover are fixed and sealed by adopting conical self-tightening threads.

6. Dosing pump according to claim 1, characterized in that the connecting rods are four in number and are arranged in four corners for increased stability.

Technical Field

The invention relates to a pump, in particular to a special quantitative pump for in-situ filtration of deep-sea microorganisms.

Background

the ocean, especially the deep sea area, is an important research and development area for human beings in the next decades. Deep sea environment has the characteristics of low temperature, high pressure, high salt and the like, and organisms living in the deep sea environment often have a plurality of unique characters. The collection and research of deep-sea microorganisms are not only helpful for human beings to understand the origin process of marine life, but also have important significance for the development of the bio-enzymology and the bio-pharmaceutical industry. The in situ seawater has a low content of microorganisms, and the mode of extracting the microorganisms by directly collecting the in situ seawater has low efficiency. Most of the existing sampling devices use a microporous filter membrane to perform in-situ enrichment on microorganisms in seawater so as to obtain a high-concentration sample. In order to drive the seawater continuous flow filtration membrane, a pump that can operate for a long time in a deep sea environment is required. Meanwhile, in order to improve the filtering effect, the pump needs to have a lower flow rate, so that the seawater has sufficient time to pass through the filter membrane; to achieve multi-stage filtration, the pump needs to have a large output pressure differential. The prior submersible pump in China has very limited working depth and can not meet the requirement of deep-sea microorganism filtration work. Common centrifugal pump and axial-flow pump are difficult to realize the working condition of low flow and high pressure difference due to the limitation of blade type structure, and the blade shaft rotating at high speed can bear great load under the deep sea environment, thereby greatly shortening the service life.

Disclosure of Invention

the invention aims to solve the technical problem of overcoming the defects in the prior art and provides a special dosing pump for in-situ filtration of deep-sea microorganisms.

The invention provides a special dosing pump for deep-sea microorganism in-situ filtration, which comprises a pump body; the device also comprises a base, an outlet one-way valve, an inlet one-way valve, a reciprocating screw rod and a guide rod sliding block;

the end surface of the base is oppositely provided with a front retainer and a rear retainer, and the top ends and the bottom ends of the front retainer and the rear retainer are connected with a reciprocating screw rod through linear guide rods which are parallel to each other; the guide rod sliding block is arranged on the linear guide rod, the screw rod sliding block is arranged on the reciprocating screw rod, and the guide rod sliding block and the screw rod sliding block are connected into a whole through a sliding block fixing frame; the tail end of the reciprocating screw rod is connected with the motor through a key slot;

The rear side of the pump body is fixed on the front retainer through a pump body fastening block; the pump body is in a long cylindrical shape, the front end of the pump body is provided with an end cover, the rear end of the pump body is provided with an opening, the end cover is provided with a through hole, and an inlet check valve and an outlet check valve are arranged in the through hole; a piston is arranged in the pump body, and the rear end of the piston is provided with a blind hole and is connected with one end of a connecting rod; the other end of the connecting rod is connected with the sliding block fixing frame.

as an improvement, the pump body fixing frame, the front retainer and the rear retainer are fixed on the base through countersunk bolts.

As an improvement, an O-shaped ring is used for sealing between the end cover and the pump body.

As an improvement, an O-shaped ring is adopted for sealing between the piston and the inner surface of the pump body.

As an improvement, the check valve is an external straight-through check valve.

As a modification, the inlet check valve and the outlet check valve are installed in opposite directions.

As an improvement, the one-way valve and the end cover are fixed and sealed through conical self-tightening threads.

as an improvement, the number of the connecting rods is four, and four corners of the connecting rods are arranged to enhance the stability.

As an improvement, the base is provided with two rows of through holes for mounting and fixing the whole device.

Compared with the prior art, the invention has the beneficial effects that:

The combination of the reciprocating screw rod and the linear guide rod forms a set of stable reciprocating linear motion mechanism, when the motor is used for driving the reciprocating screw rod to rotate in a single direction, the piston can do reciprocating linear motion in the pump body, so that continuous suction effect is generated, the in-situ seawater continuously flows from the inlet to the outlet, and a foundation is provided for filtering work. The output flow of the pump can be controlled and adjusted through the rotating speed of the output shaft of the motor, so that long-time work under low flow can be realized; the maximum output pressure difference of the pump is determined by the maximum torque of the output shaft of the motor and the reciprocating lead screw parameters, and the stable output pressure difference can be kept while the flow is regulated. Compared with an impeller mechanism of a traditional centrifugal pump, the reciprocating screw mechanism has stronger bearing capacity and lower requirement on the rotating speed of an output shaft of the motor; compared with a cam mechanism of a traditional plunger pump, the reciprocating screw rod mechanism is stable and reliable, and does not have periodical load fluctuation in work. The device can theoretically work under the full sea depth only by matching with a proper deep water motor and a proper deep water power supply.

drawings

fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the internal structure of the pump body according to the present invention.

Wherein: 1-inlet check valve; 2-U-shaped hoop; 3-pump body fastening block; 4-a linear guide rod; 5-a slide block fixing frame; 6-guide rod slide block; 7-a base; 8-outlet check valve; 9-pump body fixing frame; 10-a pump body; 11-a front cage; 12-reciprocating screw; 13-a connecting rod; 14-a lead screw slider; 15-rear holder; 16-an end cap; 17-piston.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings.

As shown in fig. 1, a dosing pump special for deep sea microbe in-situ filtration includes a pump body 10. The pump body fixing frame is characterized by further comprising an outlet one-way valve 1, an inlet one-way valve 8, a pump body fixing frame 9, a front retainer 11, a rear retainer 15, a pump body fastening block 3, a linear guide rod 4, a reciprocating lead screw 12, a guide rod sliding block 6, a lead screw sliding block 14, a sliding block fixing frame 5, a U-shaped hoop 2, a connecting rod 13 and a base 7.

as shown in fig. 2, the pump body 10 is a long cylinder, and has a front annular groove and a rear annular groove on the outer surface, the front annular groove is fixed on the pump body fixing frame 9 through the U-shaped hoop 2, the pump body fixing frame 9 is fixed on the base 7 through the countersunk head bolt, and the rear annular groove is fixed on the front retainer 11 through the pump body fastening block 3. Threaded blind holes are formed in two ends of the linear guide rod 4 and are respectively fixed on the front retainer 11 and the rear retainer 15 through bolts, and the guide rod sliding block 6 is rectangular and can freely slide on the linear guide rod 4. The reciprocating screw 12 is provided with two thread grooves with opposite rotation directions and head-to-tail connection, two ends of the thread grooves are respectively arranged on the front retainer 11 and the rear retainer 15 through rolling bearings and hole retainer rings, and the screw slider 14 is rectangular and can do reciprocating linear motion along with the rotation of the reciprocating screw 12. The front retainer 11 and the rear retainer 15 are fixed on the base 7 through countersunk bolts. The guide rod sliding block 6 and the guide rod sliding block 14 are closely attached to the side surfaces and are connected into a whole through the sliding block fixing frame 5 to move together. The end cover 16 is fixed on one side of the pump body 10 through bolts, and two tapered threaded through holes are formed in the end cover 16 and are respectively connected with the inlet check valve 1 and the outlet check valve 8. The piston 17 can move linearly in the pump body 10, and one side of the piston is provided with a plurality of threaded blind holes. Two ends of the connecting rod 13 are provided with threads, one end of the connecting rod is fixed in a threaded blind hole on the piston 17, and the other end of the connecting rod is fixed on the sliding block fixing frame 5 through a nut. Two rows of through holes are arranged on the base 7 for installing and fixing the whole device.

the working principle and the process of the invention are as follows:

1. The reciprocating screw 12 is a special screw, two thread grooves with opposite rotation directions and head-to-tail connection are machined on the surface of the reciprocating screw, when the screw slide 14 moves to the stroke end along one thread groove, the screw slide can automatically reverse and reversely move along the other thread groove, and the reciprocating screw is circularly reciprocated in such a way;

2. When the reciprocating screw 12 rotates in one direction under the drive of the motor shaft, the screw slider 14 can do reciprocating linear motion between two stroke end points, and the piston 17 can also do reciprocating linear motion in the pump body 10 because the piston 17 is connected with the slider fixing frame 5 through the connecting rod 13 and the slider fixing frame 5 is connected with the screw slider 14;

3. When the piston 17 makes a reciprocating linear motion, the volume of the inner cavity of the pump body 10 is periodically changed; when the volume of the inner cavity is increased, the outlet one-way valve 8 is closed, and outside seawater can enter the pump body through the inlet one-way valve 1; when the volume of the inner cavity is reduced, the inlet one-way valve 1 is closed, and the seawater in the pump body is discharged to the outside through the outlet one-way valve 8; the continuous suction and discharge of the seawater can be realized through the reciprocating motion of the piston 17;

4. In actual use, the device can be arranged in front or behind according to the specific requirements of microorganism in-situ sampling, and the outlet one-way valve 8 or the inlet one-way valve 1 is connected with the sampling cylinder interface by a capillary tube;

5. In order to ensure stable operation of the device, both the base 7 and the drive motor need to be fixed to the external frame structure;

finally, it is noted that the above-mentioned list is only a specific embodiment of the present invention. It is obvious that the present invention is not limited to the above embodiments, but many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.