阅读说明：本技术 砂浆泵吸程提速器 (Suction stroke accelerator of mortar pump ) 是由 刘建华 金绍武 王海会 张超 于 2020-12-31 设计创作，主要内容包括：本发明属于通过抽吸或加压作用进行挖掘、采掘作业装置的结构部件的技术领域,具体涉及一种用于采砂船的砂浆泵吸程提速的辅助装置。所述的砂浆泵吸程提速器包括吸入室、混合室、扩散室、喷嘴、射流管。吸入室呈喇叭口状,小端与混合室固连；混合室呈圆筒状,其另一端与喇叭口状的扩散室小端固连,吸入室、混合室、扩散室的轴线在同一直线上。在吸入室前端中央设有喷嘴,喷嘴与射流管相连。喷嘴轴线与吸入室轴线同心。本发明提供一种砂浆泵吸程提速器,实现对砂浆泵吸砂工作效率的提升、以及增大砂浆泵的吸程。其有益效果是：增大了砂浆泵吸程的真空度,增加了矿砂的吸入量。提高泵的效率,在砂浆泵输入功率不变的情况下提高了产量。(The invention belongs to the technical field of structural components of devices for excavating and excavating operation through suction or pressurization, and particularly relates to an auxiliary device for accelerating the suction lift of a mortar pump of a sand dredger. The suction stroke accelerator of the mortar pump comprises a suction chamber, a mixing chamber, a diffusion chamber, a nozzle and a jet pipe. The suction chamber is in a bell mouth shape, and the small end is fixedly connected with the mixing chamber; the mixing chamber is cylindrical, the other end of the mixing chamber is fixedly connected with the small end of the bell-mouth-shaped diffusion chamber, and the axes of the suction chamber, the mixing chamber and the diffusion chamber are on the same straight line. The center of the front end of the suction chamber is provided with a nozzle which is connected with a jet pipe. The nozzle axis is concentric with the suction chamber axis. The invention provides a suction stroke accelerator of a mortar pump, which can improve the working efficiency of the mortar pump for sucking sand and increase the suction stroke of the mortar pump. The beneficial effects are as follows: the vacuum degree of the suction stroke of the mortar pump is increased, and the suction amount of ore sand is increased. The efficiency of the pump is improved, and the output is improved under the condition that the input power of the mortar pump is not changed.)

1. A suction stroke accelerator of a mortar pump is assembled on a tap of the mortar pump and used for providing auxiliary power for the tap to suck mortar; the tap of the mortar pump sequentially comprises a suction chamber, a mixing chamber and a diffusion chamber, and the accelerator comprises a nozzle and a jet pipe; the tail end of a diffusion chamber of the tap is connected with a mortar pump through a mortar pipe, a jet pipe of the accelerator is arranged along the mortar pipe, and the top end of the jet pipe is provided with a high-pressure water device which provides high-pressure working fluid for realizing jet flow for the accelerator;

the method is characterized in that:

the suction chamber is cylindrical or trumpet-shaped, the inner diameter of the suction chamber is 1.4-3 times of that of the mixing chamber, and the length of the suction chamber is 0.5-0.8 times of that of the mixing chamber;

the nozzle is assembled on the suction chamber, a nozzle frame is arranged at one end of the suction chamber, which is far away from the mixing chamber, the nozzle frame is provided with a plurality of amplitude rods, the outer side ends of the amplitude rods are fixed at the edge of the suction chamber, the inner side ends of the amplitude rods are converged to the axle center to form a fixed ring, and the nozzle is assembled on the fixed ring;

a transition pipe is arranged between the nozzle and the jet pipe and is used for transition connection in a smooth structure;

the nozzle and the tap are arranged concentrically, and the central axis of the nozzle is superposed with the central axes of the suction chamber, the mixing chamber and the diffusion chamber;

the number of the jet pipes and/or the number of the transition pipes are 2-5, and the plurality of the jet pipes and the plurality of the transition pipes are respectively distributed in a central symmetry manner.

2. The mortar pump suction stroke accelerator of claim 1, wherein:

the jet pipe is arranged outside the faucet, and the central axis of the jet pipe is parallel to the central axis of the faucet;

the outer end of the transition pipe is connected with the corresponding jet pipe, and the inner end of the transition pipe is converged at the tail end of the nozzle and is communicated with the nozzle.

3. The mortar pump suction stroke accelerator of claim 1, wherein:

the nozzle is movably assembled on the fixed ring;

one ends of the jet pipes, which are far away from the nozzle, are converged into a jet main pipe;

a connecting pipe is arranged at one end of the diffusion chamber, which is far away from the nozzle, and a control ring is arranged on the outer wall of the connecting pipe;

the control ring comprises a motor, a transmission part and a sliding part, the jet flow main pipe is assembled on the sliding part, the sliding part adopts an assembling structure which comprises but is not limited to any assembling mode of a slide rail, a guide rail and a clamping groove or has similar functions, and the sliding part provides the functions of assembling, supporting and movably connecting for the jet flow main pipe; the jet manifold is provided with a rack, the transmission part of the control ring comprises a transmission shaft and a transmission wheel, the transmission shaft is used for transmission connection between the motor and the transmission wheel, and the transmission wheel is meshed with the rack on the jet manifold to realize transmission connection.

4. The mortar pump suction stroke accelerator according to claim 3, wherein:

the suction chamber, the mixing chamber, the diffusion pipe and the connecting pipe are all made of hard materials and are in rigid connection or in an integrated structure; the nozzle, the transition pipe, the jet pipe and the jet main pipe are all made of hard materials and are in rigid connection with each other or are in an integrated structure;

the far end of the connecting pipe is connected with a mortar pump by adopting a flexible mortar pipe;

the far end of the jet main pipe is connected with a high-pressure water device by adopting a flexible water pipe;

the control ring adopts a sealed cavity structure, and the motor, the transmission part and the sliding part are sealed in the control ring by adopting sealing materials and/or sealing components.

5. The mortar pump suction stroke accelerator according to any one of claims 1 to 4, wherein:

the nozzle and/or the faucet are/is provided with fins;

the nozzle is provided with 3-5 crushing fins which are arranged on the outer wall of the nozzle, the crushing fins are centrally and symmetrically distributed by taking the central axis of the nozzle as the center, and the crushing fins are obliquely arranged at 1-5 degrees;

the faucet is provided with a flow guide fin which is vertically arranged on the inner wall of the faucet and is parallel to the central axis of the faucet;

the flow guide fins are arranged in the mixing chamber and/or the diffusion chamber and/or the connecting pipe and extend from one end of the mixing chamber close to the nozzle to the direction of the connecting pipe; the height of the guide fins at the positions of the mixing chamber and the diffusion chamber gradually increases along the direction, and the height of the guide fins at the positions of the connecting pipes gradually decreases along the direction.

6. The mortar pump suction stroke accelerator according to claim 5, wherein:

the crushing fins comprise an upright section and an inclined section, wherein the upright section is a far end far away from the nozzle, and the inclined section is a near end close to the nozzle; the inclined section is provided with an inclination of 3-5 degrees relative to the central axis direction of the nozzle, and the upright section is arranged in parallel relative to the central axis direction of the nozzle;

the inclined section is provided with a gradually changed inclination angle, and the inclination angle gradually changes to zero from the connecting part of the inclined section and the nozzle to the direction of the upright section.

7. The mortar pump suction stroke accelerator according to any one of claims 1 to 4, wherein:

the faucet is vertically arranged, and a plurality of transition pipes and/or jet pipes which are centrally and symmetrically distributed form a pyramid-shaped or conical cover cage at the periphery of the faucet;

when the cage adopts a pyramid shape, the bottom surface is a plane; when the cage is conical, the bottom surface of the cage is of a dome structure with a semi-elliptical section.

8. The mortar pump suction stroke accelerator of claim 7, wherein:

the mortar pipe is provided with a floating indicating device, the floating indicating device comprises a vertical rod, a guy cable and a floating ball, the bottom end of the vertical rod is fixed on the tap, the floating ball floats on the water surface, and the guy cable is connected between the floating ball and the top end of the vertical rod;

the floating ball is provided with a scroll rewinding device, the top end of the inhaul cable is fixed on the scroll rewinding device, and the scroll rewinding device forces the top of the inhaul cable to be wound on the scroll rewinding device, so that the inhaul cable between the floating ball and the top end of the vertical rod is stretched straight;

the length of the vertical rod is 0.3-0.8 times of the submergence depth of the faucet.

9. The mortar pump suction stroke accelerator according to any one of claims 1 to 4, 6 and 8, wherein:

the outer diameter of the suction chamber is 325mm, the length of the suction chamber is 150mm, the outer diameter of the mixing chamber is 219mm, and the length of the mixing chamber is 300 mm; the diffusion chamber is trumpet-shaped, and diffusion chamber osculum end external diameter equals with the mixing chamber external diameter, and diffusion chamber length is 240-.

10. The mortar pump suction stroke accelerator of claim 9, wherein:

the oblique angle alpha of the diffusion chamber is 6 degrees; the diameter of the nozzle 4 is 40 mm; the jet flow velocity was 8 m/s.

Technical Field

The invention belongs to the technical field of structural components of devices for excavating and excavating operation through suction or pressurization, and particularly relates to an auxiliary device for accelerating the suction lift of a mortar pump of a sand dredger.

Background

In the natural sand production and screening process, the first process is that the sand production ship carries out sand production, and the specific method is that a mortar pump is arranged on the sand production ship, a tap of the mortar pump is placed into water, sand and water are sucked out by means of suction of the mortar pump and conveyed to the next process through a pipeline for sand washing.

The jet sand pump for excavating sandy soil in river, lake and other environment is one kind of negative pressure producing high pressure water jet to suck and lift sandy soil. For example, CN2679250Y provides a jet-type sand suction device, which comprises a pump body, a high-pressure water inlet pipe, a nozzle, a sand outlet, and a sand suction pipe, wherein the high-pressure water inlet pipe, the nozzle, the sand outlet, and the sand suction pipe are sequentially arranged along the same axis in the pump body. When the water sprayer works, the high-pressure water inlet pipe is connected with high-pressure water, the water flow is sprayed out from a nozzle hole of the sprayer at a high speed to form a high-speed water column, and water drops formed by water atomization are arranged behind the water drops along the movement direction of the water drops, and air is expanded by the water drops to form negative pressure. The sand suction pipe is arranged at the lateral position of the spray head on the pump body, and the upper port of the sand suction pipe is positioned behind the spray head, so that the air pressure in the sand suction pipe is reduced at the moment, and the sandy soil is sucked and lifted under the action of the negative pressure. However, in the conventional apparatus, only one nozzle hole is provided in the nozzle, and the atomization efficiency by the high-pressure water is low, the number of water droplets is small, and the expansion effect on the air is weak, so that the overall efficiency is low.

In such a conventional process, in consideration of the problem of severe wear of parts such as a pump body, an impeller, and the like, a main part for performing actual work is changed into a jet pump, a power source of the jet pump is high-pressure water flow which can be obtained by corresponding equipment, and the wear of the equipment is much smaller than that of a conventional mortar pump. The mortar raw material is mainly mined by a jet pump, the mortar is pumped out by power liquid, the abrasion of the mortar to equipment is greatly reduced, but the working efficiency and the obtained mortar raw material have certain difference compared with the conventional mortar pump, and the working efficiency of the jet pump is generally not more than 30%.

In addition, in order to improve the suction distance of the mortar pump of the sand dredger, the input power of the mortar pump needs to be increased, the suction amount of the mortar pump of the sand dredger is determined by the height of the suction distance, namely the yield of the sand dredger, when the suction distance reaches 8 meters, high power is added, the suction distance is increased little, the power consumption is increased, and the benefit is reduced. The capability of ship mining determines the high and low output of enterprises, and in order to ensure the high-quality development of the enterprises and increase the yield and income, the problem that the sand mining process needs to be solved by increasing the suction lift of a sand mining ship mortar pump under the condition of unchanged input power is solved.

Disclosure of Invention

The invention mainly aims to solve the existing problems and provides a suction stroke accelerator of a mortar pump, which can improve the working efficiency of sand suction of the mortar pump and increase the suction stroke of the mortar pump.

The above purpose is realized by the following technical scheme: a suction stroke accelerator of a mortar pump is assembled on a tap of the mortar pump and used for providing auxiliary power for the tap to suck mortar; the tap of the mortar pump sequentially comprises a suction chamber, a mixing chamber and a diffusion chamber, and the accelerator comprises a nozzle and a jet pipe; the tail end of a diffusion chamber of the tap is connected with a mortar pump through a mortar pipe, a jet pipe of the accelerator is arranged along the mortar pipe, and the top end of the jet pipe is provided with a high-pressure water device which provides high-pressure working fluid for realizing jet flow for the accelerator;

the method is characterized in that:

the suction chamber is cylindrical or trumpet-shaped, the inner diameter of the suction chamber is 1.4-3 times of that of the mixing chamber, and the length of the suction chamber is 0.5-0.8 times of that of the mixing chamber;

the nozzle is assembled on the suction chamber, a nozzle frame is arranged at one end of the suction chamber, which is far away from the mixing chamber, the nozzle frame is provided with a plurality of amplitude rods, the outer side ends of the amplitude rods are fixed at the edge of the suction chamber, the inner side ends of the amplitude rods are converged to the axle center to form a fixed ring, and the nozzle is assembled on the fixed ring;

a transition pipe is arranged between the nozzle and the jet pipe and is used for transition connection in a smooth structure;

the nozzle and the tap are arranged concentrically, and the central axis of the nozzle is superposed with the central axes of the suction chamber, the mixing chamber and the diffusion chamber;

the number of the jet pipes and/or the number of the transition pipes are 2-5, and the plurality of the jet pipes and the plurality of the transition pipes are respectively distributed in a central symmetry manner.

The jet pipe is provided with a faucet outer side, and the central axis of the jet pipe is parallel to the central axis of the faucet.

The outer end of the transition pipe is connected with the corresponding jet pipe, and the inner end of the transition pipe is converged at the tail end of the nozzle and is communicated with the nozzle.

The nozzle is movably assembled on the fixed ring;

one ends of the jet pipes, which are far away from the nozzle, are converged into a jet main pipe;

a connecting pipe is arranged at one end of the diffusion chamber, which is far away from the nozzle, and a control ring is arranged on the outer wall of the connecting pipe;

the control ring comprises a motor, a transmission part and a sliding part, the jet flow main pipe is assembled on the sliding part, the sliding part adopts an assembling structure which comprises but is not limited to any assembling mode of a slide rail, a guide rail and a clamping groove or has similar functions, and the sliding part provides the functions of assembling, supporting and movably connecting for the jet flow main pipe; the jet manifold is provided with a rack, the transmission part of the control ring comprises a transmission shaft and a transmission wheel, the transmission shaft is used for transmission connection between the motor and the transmission wheel, and the transmission wheel is meshed with the rack on the jet manifold to realize transmission connection.

The suction chamber, the mixing chamber, the diffusion pipe and the connecting pipe are all made of hard materials and are in rigid connection or in an integrated structure; the nozzle, the transition pipe, the jet pipe and the jet main pipe are all made of hard materials and are in rigid connection with each other or are in an integrated structure;

the far end of the connecting pipe is connected with a mortar pump by adopting a flexible mortar pipe;

the far end of the jet main pipe is connected with a high-pressure water device by adopting a flexible water pipe.

The control ring adopts a sealed cavity structure, and the motor, the transmission part and the sliding part are sealed in the control ring by adopting sealing materials and/or sealing components.

The nozzle and/or the tap are provided with fins.

The nozzle is provided with 3-5 crushing fins which are arranged on the outer wall of the nozzle, the crushing fins are centrally and symmetrically distributed by taking the central axis of the nozzle as the center, and the crushing fins are obliquely arranged at 1-5 degrees.

The faucet is provided with a flow guide fin which is vertically arranged on the inner wall of the faucet and is parallel to the central axis of the faucet.

The flow guide fins are arranged in the mixing chamber and/or the diffusion chamber and/or the connecting pipe and extend from one end of the mixing chamber close to the nozzle to the direction of the connecting pipe; the height of the guide fins at the positions of the mixing chamber and the diffusion chamber gradually increases along the direction, and the height of the guide fins at the positions of the connecting pipes gradually decreases along the direction.

The crushing fins comprise an upright section and an inclined section, wherein the upright section is a far end far away from the nozzle, and the inclined section is a near end close to the nozzle; the inclined section is provided with an inclination of 3-5 degrees relative to the central axis direction of the nozzle, and the upright section is arranged in parallel relative to the central axis direction of the nozzle.

The inclined section is provided with a gradually changed inclination angle, and the inclination angle gradually changes to zero from the connecting part of the inclined section and the nozzle to the direction of the upright section.

The faucet is vertically arranged, and a plurality of transition pipes and/or jet pipes which are centrally and symmetrically distributed form a pyramid-shaped or conical cover cage at the periphery of the faucet;

when the cage adopts a pyramid shape, the bottom surface is a plane; when the cage is conical, the bottom surface of the cage is of a dome structure with a semi-elliptical section.

The mortar pipe is equipped with showy indicating device, and this showy indicating device includes pole setting, cable, floater, and the pole setting bottom is fixed on the tap, and the floater floats at the surface of water, and the cable is connected between floater and pole setting top.

The inhaul cable is an elastic rope or a spring.

The floating ball is provided with a scroll winding device, the top end of the inhaul cable is fixed on the scroll winding device, and the scroll winding device forces the top of the inhaul cable to be wound on the scroll winding device, so that the inhaul cable between the floating ball and the top end of the vertical rod is stretched straight.

The length of the vertical rod is 0.3-0.8 times of the submergence depth of the faucet.

The outer diameter of the suction chamber is 325mm, the length of the suction chamber is 150mm, the outer diameter of the mixing chamber is 219mm, and the length of the mixing chamber is 300 mm; the diffusion chamber is trumpet-shaped, and diffusion chamber osculum end external diameter equals with the mixing chamber external diameter, and diffusion chamber length is 240-.

The oblique angle alpha of the diffusion chamber is 6 degrees; the diameter of the nozzle 4 is 40 mm; the jet flow velocity was 8 m/s.

The beneficial effects are as follows: the vacuum degree of the suction stroke of the mortar pump is increased, the suction amount of ore sand is increased, the suction stroke and the efficiency of the pump are improved, and the yield is improved under the condition that the input power of the mortar pump is not changed.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a schematic structural view of a first embodiment of the present invention in which two jet pipes are provided;

FIG. 3 is a schematic structural diagram of three jet pipes provided in the first embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a third embodiment of the present invention;

FIG. 6 is a schematic structural view of a pyramid-shaped cage according to a fourth embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a fourth embodiment of the present invention in which a conical cage is used;

fig. 8 is a schematic structural view of a floating indicating device according to a fourth embodiment of the present invention.

As can be seen from the figure:

10 taps, 11 suction chambers, 12 mixing chambers, 13 diffusion chambers, 14 mortar pipes, 15 mortar pumps and 16 connecting pipes

20 control rings, 21 motors, 22 transmission parts, 23 sliding parts, 24 transmission shafts and 25 transmission wheels

30 accelerators, 31 nozzles, 32 jet pipes, 33 nozzle frames, 34 high-pressure water devices, 35 transition pipes, 36 jet main pipes, 37 racks and 38 cages

40 fins, 41 broken fins, 42 vertical sections, 43 inclined sections and 44 guide fins

50 float indicating device, 51 upright rod, 52 guy cable, 53 float ball and 54 scroll winding device.

Detailed Description

[ example 1 ]

As shown in fig. 1 to 3, the suction stroke accelerator of the mortar pump according to the embodiment is assembled on a tap of the mortar pump and is used for providing auxiliary power for the tap to suck mortar; the tap of the mortar pump sequentially comprises a suction chamber, a mixing chamber and a diffusion chamber, and the accelerator comprises a nozzle and a jet pipe; the tail end of a diffusion chamber of the tap is connected with a mortar pump through a mortar pipe, a jet pipe of the accelerator is arranged along the mortar pipe, and the top end of the jet pipe is provided with a high-pressure water device which provides high-pressure working fluid for realizing jet flow for the accelerator;

the method is characterized in that:

the suction chamber is cylindrical or trumpet-shaped, the inner diameter of the suction chamber is 1.4-3 times of that of the mixing chamber, and the length of the suction chamber is 0.5-0.8 times of that of the mixing chamber; unlike the conventional jet pump, the faucet structure involved in the present embodiment is different therefrom, and the structural difference is significant. In order to ensure the normal operation of the conventional jet pump or further improve the sand suction efficiency of the jet pump, the sand inlet device of the conventional jet pump usually adopts a sand inlet pipe with the caliber far smaller than that of the jet pump body or similar to the jet pump body so as to build and maintain the negative pressure state at the jet nozzle, and the sand inlet pipe usually adopts an outwardly extending structure so as to avoid damaging the closure of the jet pump. The above conventional structure is shown in the prior art documents in the background art, and is not described in detail.

The nozzle is assembled on the suction chamber, a nozzle frame is arranged at one end of the suction chamber, which is far away from the mixing chamber, the nozzle frame is provided with a plurality of amplitude rods, the outer side ends of the amplitude rods are fixed at the edge of the suction chamber, the inner side ends of the amplitude rods are converged to the axle center to form a fixed ring, and the nozzle is assembled on the fixed ring;

a transition pipe is arranged between the nozzle and the jet pipe and is used for transition connection in a smooth structure;

the nozzle and the tap are arranged concentrically, and the central axis of the nozzle is superposed with the central axes of the suction chamber, the mixing chamber and the diffusion chamber; the transition pipe is relatively speaking, the nozzle is arranged along the central axis of the faucet, the jet pipe is also arranged outside the faucet in a parallel manner, and the jet pipe and the nozzle need to be connected, which is the purpose and function of the transition pipe. The transition pipe does not have a strict dividing boundary line, and the transition pipe can be a jet pipe per se or other tubular structures which are used for realizing that a plurality of jet pipes are converged together and are communicated with the nozzle together.

The number of the jet pipes and/or the number of the transition pipes are 2-5, and the plurality of the jet pipes and the plurality of the transition pipes are respectively distributed in a central symmetry manner.

The jet pipe is provided with a faucet outer side, and the central axis of the jet pipe is parallel to the central axis of the faucet.

The outer end of the transition pipe is connected with the corresponding jet pipe, and the inner end of the transition pipe is converged at the tail end of the nozzle and is communicated with the nozzle.

[ example 2 ]

As shown in fig. 4, on the basis of the above embodiment, the nozzle of the present embodiment is movably fitted to the fixing ring;

one ends of the jet pipes, which are far away from the nozzle, are converged into a jet main pipe;

a connecting pipe is arranged at one end of the diffusion chamber, which is far away from the nozzle, and a control ring is arranged on the outer wall of the connecting pipe;

the control ring comprises a motor, a transmission part and a sliding part, the jet flow main pipe is assembled on the sliding part, the sliding part adopts an assembling structure which comprises but is not limited to any assembling mode of a slide rail, a guide rail and a clamping groove or has similar functions, and the sliding part provides the functions of assembling, supporting and movably connecting for the jet flow main pipe; the jet manifold is provided with a rack, the transmission part of the control ring comprises a transmission shaft and a transmission wheel, the transmission shaft is used for transmission connection between the motor and the transmission wheel, and the transmission wheel is meshed with the rack on the jet manifold to realize transmission connection.

It should be noted that: the control ring is a connecting assembly part which is assembled on the connecting pipe and is provided with an inner space, the inner space is used for accommodating the motor, the transmission part, the sliding part and the corresponding auxiliary part, and the main function of the control ring is to movably assemble the jet main pipe on the connecting pipe so that the jet main pipe can do reciprocating adjustment movement relative to the connecting pipe. Because the whole tap of the mortar pump is underwater, the control ring also works underwater, and therefore the assembly part between the jet main pipe and the connecting pipe, namely the control ring, needs to be designed in a sealing manner.

The suction chamber, the mixing chamber, the diffusion pipe and the connecting pipe are all made of hard materials and are in rigid connection or in an integrated structure; the nozzle, the transition pipe, the jet pipe and the jet main pipe are all made of hard materials and are in rigid connection with each other or are in an integrated structure;

the far end of the connecting pipe is connected with a mortar pump by adopting a flexible mortar pipe;

the far end of the jet main pipe is connected with a high-pressure water device by adopting a flexible water pipe. The flexible water pipe is a high-pressure water delivery hose including but not limited to a cloth-sandwiched hose, a cord-cord hose, a steel wire woven hose and the like or a similar flexible pipe capable of being bent and resisting pressure, and has the function of communicating a high-pressure water system. The high-pressure water is a general description, namely fluid with certain pressure which can meet the requirement of sand suction operation and realize the function of accelerating and sucking sand of a mortar pump faucet, and the pressure level is limited to the use of sand production of a sand production disc.

The control ring adopts a sealed cavity structure, and the motor, the transmission part and the sliding part are sealed in the control ring by adopting sealing materials and/or sealing components.

[ example 3 ]

As shown in fig. 5, on the basis of the above embodiment, the nozzle and/or the faucet of the present embodiment is provided with fins.

The nozzle is provided with 3-5 crushing fins which are arranged on the outer wall of the nozzle, the crushing fins are centrally and symmetrically distributed by taking the central axis of the nozzle as the center, and the crushing fins are obliquely arranged at 1-5 degrees.

The faucet is provided with a flow guide fin which is vertically arranged on the inner wall of the faucet and is parallel to the central axis of the faucet.

The flow guide fins are arranged in the mixing chamber and/or the diffusion chamber and/or the connecting pipe and extend from one end of the mixing chamber close to the nozzle to the direction of the connecting pipe; the height of the guide fins at the positions of the mixing chamber and the diffusion chamber gradually increases along the direction, and the height of the guide fins at the positions of the connecting pipes gradually decreases along the direction.

The crushing fins comprise an upright section and an inclined section, wherein the upright section is a far end far away from the nozzle, and the inclined section is a near end close to the nozzle; the inclined section is provided with an inclination of 3-5 degrees relative to the central axis direction of the nozzle, and the upright section is arranged in parallel relative to the central axis direction of the nozzle.

The inclined section is provided with a gradually changed inclination angle, and the inclination angle gradually changes to zero from the connecting part of the inclined section and the nozzle to the direction of the upright section.

The mortar is produced in a natural water source environment, the mortar raw material is mainly water-sand mixture, but block-shaped hard objects such as stones, large solid wastes, shells and the like are difficult to be sucked into a mortar pipe and a mortar pump, and equipment damage or failure is easy to cause. Through the arrangement of the crushing fins, part of the block-shaped hard objects can be blocked and crushed, and the damage to equipment caused by the block-shaped hard objects is reduced. In addition, in order to accelerate the sufficient mixing of the mortar entering the suction chamber and the high-pressure water in the jet pipe so as to improve the flow velocity and the flow rate of the mortar, all or part of the obliquely arranged crushing fins can form rotational flow on the mortar entering the suction chamber, and the roots of the crushing fins, namely the obliquely arranged crushing fins can enable the mortar close to the axis to generate larger rotational flow so as to be sufficiently mixed with the jet flow at the axis. In the mixing and diffusion process of the mortar in the mixing chamber and the diffusion chamber, the flow velocity of the mortar should be mainly increased, so that the front-end rotational flow needs to be rectified, the more homogeneous mortar flows into the mortar pipe, and the non-uniformity of the mortar is reduced. Therefore, under the condition of reducing the influence on the flow velocity of the mortar to be as small as possible, the mortar in the faucet and the mortar pipe can smoothly flow through the flow guide fins arranged on the inner wall of the faucet.

[ example 4 ]

As shown in fig. 6-8, on the basis of the above embodiments, the faucet of the present embodiment is vertically arranged, and a plurality of transition pipes and/or jet pipes distributed in a central symmetry form a pyramid-shaped or conical cage at the periphery of the faucet;

when the cage adopts a pyramid shape, the bottom surface is a plane; when the cage is conical, the bottom surface of the cage is of a dome structure with a semi-elliptical section.

The mortar pipe is equipped with showy indicating device, and this showy indicating device includes pole setting, cable, floater, and the pole setting bottom is fixed on the tap, and the floater floats at the surface of water, and the cable is connected between floater and pole setting top.

When the water faucet is used, the water faucet is vertically placed into water through the mortar pipe, the cover cage is in contact with the bottom, and the vertical state of the water faucet is kept. At the moment, the upright stanchion and the mortar pipe are in the same vertical position, and the tap can be judged to be in a vertical state. When the tap slope lodging, the tap of slope drives the pole setting slope, and the pole setting top takes place the displacement, drives cable and floater and keeps away from the mortar pipe, and operating personnel can judge the degree of slope of tap through the skew degree of floater to adjust.

The inhaul cable is an elastic rope or a spring.

The floating ball is provided with a scroll winding device, the top end of the inhaul cable is fixed on the scroll winding device, and the scroll winding device forces the top of the inhaul cable to be wound on the scroll winding device, so that the inhaul cable between the floating ball and the top end of the vertical rod is stretched straight.

The length of the vertical rod is 0.3-0.8 times of the submergence depth of the faucet.

[ example 5 ]

On the basis of the above embodiment, the outer diameter of the suction chamber is 325mm and the length thereof is 150mm, and the outer diameter of the mixing chamber is 219mm and the length thereof is 300 mm; the diffusion chamber is trumpet-shaped, and diffusion chamber osculum end external diameter equals with the mixing chamber external diameter, and diffusion chamber length is 240-.

The oblique angle alpha of the diffusion chamber is 6 degrees; the diameter of the nozzle 4 is 40 mm; the jet flow velocity was 8 m/s.

[ example 6 ]

On the basis of the above embodiments, one inventive concept of the present invention for improving the suction lift of the mortar pump is as follows: adopt a multistage clarified water pump, reduce the bore of multistage clarified water pump's delivery port, improve the velocity of flow of water, introduce the sunction inlet of mortar pump with this high-speed rivers through the pipeline, drive the flow of ore sand, along with the improvement of the velocity of flow, the velocity of flow of ore sand also increases thereupon, has increased the vacuum of mortar pump suction stroke, has increased the suction capacity of ore sand. Several embodiments are described below with reference to the accompanying drawings.

As shown in fig. 1, the prior art mortar pump faucet of the sand dredger comprises a suction chamber, a mixing chamber and a diffusion chamber, wherein the suction chamber is cylindrical, a dead angle exists at the joint of the suction chamber and the mixing chamber, and the resistance of mortar entering the mixing chamber is increased; the mixing chamber is cylindrical, the other end of the mixing chamber is fixedly connected with the small end of the bell-mouth-shaped diffusion chamber, and the axes of the suction chamber, the mixing chamber and the diffusion chamber are on the same straight line. In order to increase the suction force of the faucet, the faucet is designed into a throat type, namely the middle of the faucet is thin and the two ends of the faucet are thick, when mortar passes through the middle of the faucet, the flow speed is increased, the pressure is reduced, and the suction force is increased. However, the size of the oblique angle alpha of the diffusion chamber affects the outflow speed of mortar, when the oblique angle alpha is small, the throat effect is not obvious, when the oblique angle alpha is large, vortex can be generated in the diffusion chamber, the suction stroke of a mortar pump is directly affected, and the suction stroke of the mortar pump is measured by changing the oblique angle alpha of the diffusion chamber under the condition that the input power of the mortar pump and the inner diameter of a mixing chamber are not changed, wherein the specific data are as follows:

table I shows the influence of the oblique angle alpha on the suction lift

Oblique angle alpha	30	50	60	70	90
						Suction distance m	6.6	7.5	8	7	6

It can be seen from the table that the diffusion chamber 3 has an oblique angle 6⁰The suction distance of the mortar pump is highest.

The center of the front end of the suction chamber is provided with a nozzle which is connected with a jet pipe. The jet pipe links to each other with multistage clarified water pump, and the nozzle axis is concentric with the suction chamber axis, and nozzle 4 sprays high-speed rivers to the suction chamber and is the efflux to increase leading sand absorption volume, nevertheless the size of nozzle 4 diameter and efflux velocity of flow height determine the stroke of inhaling of mortar pump, in practice, has tested the influence of nozzle diameter and efflux velocity of flow to the stroke of inhaling of mortar pump respectively, and test data is like table two, table three:

second table for influence of nozzle diameter on suction lift

Nozzle diameter mm	33	37	40	45	49
						Suction distance m	11	12	13	11.5	10

Influence of jet flow velocity on suction lift table three

Jet flow velocity m/s	6	7	8	8.5	9
						Suction distance m	11	12	13	13	13

With the above tests, the best observed data with constant mixing chamber diameter, suction chamber angle and motor power was: angle of inclination alpha is 6⁰(ii) a The diameter of the nozzle is 40 mm; the suction lift of the mortar pump is the highest when the jet flow velocity is 8 m/s.

On the basis of the above embodiment, the diameter of the outlet of the nozzle 4 is smaller than that of the jet pipe; the diameter of the nozzle 4 is smaller than the diameter of the mixing chamber.

On the basis of the above embodiment, the concrete dimensions of the mortar pump faucet are as follows: the length of the suction chamber is 250mm, the diameter of the inlet is phi 325mm, the diameter of the mixing chamber is phi 219mm, the length of the mixing chamber is 200mm, the diameter of the outlet of the diffusion chamber is phi 273 mm, the length of the diffusion chamber is 250mm, and the bevel angle alpha is 6⁰The nozzle diameter was 40mm and the jet flow rate was 8 m/s.

Practice proves that the invention has reasonable design, increases the suction lift, improves the production capacity of the sand dredger and has better popularization value.