CN212479488U

CN212479488U - High-pressure trace liquid constant-speed transmission device

Info

Publication number: CN212479488U
Application number: CN202020748120.0U
Authority: CN
Inventors: 石万忠; 张海吉
Original assignee: Wuhan Xinsheng Ji Technology Co ltd
Current assignee: Wuhan Xinsheng Ji Technology Co ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2021-02-05
Anticipated expiration: 2030-05-08

Abstract

The utility model discloses a high pressure trace type liquid constant speed transmission, include: the accommodating mechanism, the pushing mechanism, the injecting mechanism and the liquid outlet mechanism; the propelling mechanism comprises a motor, a speed reducer, a screw rod, a nut, a limiting device and a push rod, wherein an output shaft of the motor is connected with an input end of the speed reducer, an output end of the speed reducer is connected with the screw rod and used for driving the screw rod to rotate, and the nut is in threaded connection with the screw rod; the injection mechanism is connected with the injection cylinder and is used for injecting liquid into the injection cavity; the liquid outlet mechanism is connected with the injection tube and is used for discharging liquid in the injection cavity. The utility model provides a technical scheme's beneficial effect is: the speed of the screw rod is reduced to the required speed through the speed reducer, the screw rod drives the nut to move, the nut drives the push rod to push the piston, and the whole mechanism is low in movement speed, small in piston area and low in pressure generated in the advancing process of the mechanism, so that the requirement that the medium is pushed to reach the pressure at the low speed within the required time can be met.

Description

High-pressure trace liquid constant-speed transmission device

Technical Field

The utility model belongs to the technical field of the experimental facilities technique and specifically relates to a high pressure trace type liquid constant speed transmission.

Background

In some rock experiments (especially rock micro displacement experiments), the pushed medium is required to reach the rock sample part at a lower speed and under a certain high pressure, and due to the fact that the speed of the actual equipment passes through a block, the target pressure reaches instantly, instant pressure is generated, the test piece is easily broken and damaged, and the experimental target cannot be reached, so that a high-pressure micro constant-speed transmission device is needed.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to provide a constant-speed liquid transmission device that pushes out a liquid medium at a constant speed and at a relatively low speed, so as to ensure that the phenomenon that an experimental sample is destroyed by instantaneous pressure does not occur.

A high-pressure micro-type liquid constant-speed transmission device comprising: an accommodating mechanism, a propelling mechanism, an injecting mechanism and a liquid outlet mechanism,

the accommodating mechanism comprises an injection tube and a piston, the injection tube is provided with a closed long injection cavity, and the piston is accommodated in the injection cavity and attached to the inner wall of the injection tube;

the propelling mechanism comprises a motor, a speed reducer, a screw rod, a nut, a limiting device and a push rod, wherein an output shaft of the motor is connected with an input end of the speed reducer, an output end of the speed reducer is connected with the screw rod and used for driving the screw rod to rotate, the nut is in threaded connection with the screw rod, the limiting device is fixed on the injection tube and connected with the nut and used for limiting the rotation of the nut, one end of the push rod is fixedly connected with the nut, the other end of the push rod is fixedly connected with the piston, the piston is driven by the push rod to extrude liquid in the injection cavity, the push rod is of a hollow structure and is provided with a hollow cavity, and the screw rod partially extends into the hollow cavity and is in clearance fit with the push rod;

the injection mechanism is connected with the injection cylinder and is used for injecting liquid into the injection cavity;

the liquid outlet mechanism is connected with the injection cylinder and is used for discharging liquid in the injection cavity.

Compared with the prior art, the utility model provides a technical scheme's beneficial effect is: the speed of the screw rod is reduced to the required speed through the speed reducer, the screw rod drives the nut to move, the nut drives the push rod to push the piston, and the whole mechanism is low in movement speed, small in piston area and low in pressure generated in the advancing process of the mechanism, so that the requirement that the medium is pushed to reach the pressure at the low speed within the required time can be met.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of a high-pressure micro-type liquid constant-speed transmission according to the present invention;

FIG. 2 is a top plan view of the high pressure micro-type liquid constant velocity transmission of FIG. 1;

fig. 3 is a sectional view of the high-pressure micro-type liquid constant speed drive in fig. 2, taken along a-a section;

fig. 4 is a sectional view of the high-pressure micro-type liquid constant speed drive in fig. 3, taken along the B-B plane;

in the figure: 1-containing mechanism, 2-propelling mechanism, 3-injecting mechanism, 4-liquid discharging mechanism, 5-displacement measuring device, 11-injection tube, 12-piston, 21-motor, 22-reducer, 23-screw rod, 24-nut, 25-limiting device, 251-shell, 2511-limiting groove, 252-screw sleeve, 253-connecting rod, 26-push rod, 27-synchronizing wheel, 28-synchronizing belt, 29-bearing, 31-liquid storage tank, 32-liquid inlet valve, 41-liquid outlet valve, 42-liquid outlet pipe, 51-displacement measuring base and 52-displacement measuring movable end.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, the present invention provides a high-pressure micro-liquid constant-speed transmission device, which includes an accommodating mechanism 1, a propelling mechanism 2, an injecting mechanism 3 and a liquid outlet mechanism 4.

Referring to fig. 1 to 3, the accommodating mechanism 1 includes a syringe 11 and a piston 12, the syringe 11 has a sealed long injection cavity, and the piston 12 is accommodated in the injection cavity and attached to an inner wall of the syringe 11.

Referring to fig. 1 to 3, the propelling mechanism 2 includes a motor 21, a speed reducer 22, a screw rod 23, a nut 24, a limiting device 25 and a push rod 26, an output shaft of the motor 21 is connected to an input end of the speed reducer 22, an output end of the speed reducer 22 is connected to the screw rod 23 by a folding structure and is used for driving the screw rod 23 to rotate, the nut 24 is in threaded connection with the screw rod 23, the limiting device 25 is fixed to the syringe 11, the limiting device 25 is connected to the nut 24 and is used for limiting the nut 24 to rotate, one end of the push rod 26 is fixedly connected to the nut 24, the other end of the push rod 26 is fixedly connected to the piston 12, the piston 12 is driven by the push rod 26 to extrude the liquid in the syringe cavity, the push rod 26 is of a hollow structure and has a hollow cavity, the screw 23 partially extends into the hollow cavity and is in clearance fit with the push rod 26.

Referring to fig. 1 to 3, the injection mechanism 3 is connected to the syringe 11 and is used for injecting liquid into the injection cavity. The liquid outlet mechanism 4 is connected with the injection tube 11 and is used for discharging liquid in the injection cavity.

The utility model provides a high pressure trace type liquid constant speed drive device is when using, the injection mechanism 3 is to injection intracavity injection liquid, reopen motor 21, motor 21 passes through reduction gear 22 speed reduction and increases the back of turning round, drive lead screw 23 and rotate, lead screw 23 exerts the effort to nut 24, because nut 24 receives stop device 25 spacing, nut 24 moves right, drive the push rod 26 rather than fixed connection and move right, thereby promote piston 12 and move right, liquid pressure in the injection chamber rises, discharge through going out liquid mechanism 4, supply relevant experiment to use.

Specifically, referring to fig. 1-4, the limiting device 25 includes a housing 251, a threaded sleeve 252 and a connecting rod 253, the housing 251 has an accommodating cavity, the housing 251 and the syringe 11 are coaxially disposed and fixedly connected, a limiting groove 2511 communicated with the accommodating cavity is disposed on a side wall of the housing 251, and an extending direction of the limiting groove 2511 is parallel to an axial direction of the syringe 11; the threaded sleeve 252 is arranged in the accommodating cavity, and the threaded sleeve 252 is sleeved on the nut 24 and is fixedly connected with the nut 24; one end of the connecting rod 253 is matched with the limiting groove 2511 and can slide along the limiting groove 2511, and the other end of the connecting rod 253 is fixedly connected with the threaded sleeve 252. When in use, because the connecting rod 253 is clamped in the limiting groove 2511, the threaded sleeve 252 fixedly connected with the connecting rod 253 and the nut 24 fixedly connected with the threaded sleeve 252 cannot rotate and can only move along the axial direction of the injection cylinder 11, thereby pushing the push rod 26 to move.

Specifically, referring to fig. 1 to fig. 3, the propelling mechanism 2 further includes a synchronous wheel 27 and a synchronous belt 28, the synchronous wheel 27 is sleeved on the screw rod 23 and is fixedly connected to the screw rod 23, one end of the synchronous belt 28 is connected to the synchronous wheel 27, and the other end of the synchronous belt 28 is connected to the output end of the speed reducer 22. In use, the speed reducer 22 drives the synchronous wheel 27 to rotate through the synchronous belt 28, and the synchronous wheel 27 drives the screw 23 to rotate.

Specifically, referring to fig. 1 to fig. 3, the propelling mechanism 2 further includes a bearing 29, the bearing 29 is sleeved on the screw rod 23, an inner ring of the bearing 29 is fixedly connected to the screw rod 23, and an outer ring of the bearing 29 is fixedly connected to the housing 251. By providing the bearing 29, the stability of the rotation of the screw 23 is enhanced.

Further, referring to fig. 1 to 3, the high-pressure micro-type liquid constant-speed transmission device further includes a displacement measuring device 5, the displacement measuring device 5 includes a displacement measuring base 51 and a displacement measuring movable end 52, the displacement measuring base 51 is fixed on the housing 251, and the displacement measuring movable end 52 is fixedly connected to the connecting rod 253. In the present embodiment, the displacement measuring device 5 is a string displacement sensor. In use, the link 253 moves during the process of moving to the right, so as to drive the movable displacement measuring end 52 to move, thereby measuring the speed of the link 253 moving to the right, and monitoring the advancing speed of the piston 12 in real time.

Specifically, referring to fig. 1-3, the injection mechanism 3 includes a liquid storage tank 31 and a liquid inlet valve 32, the liquid storage tank 31 has a closed liquid storage cavity, one end of the liquid inlet valve 32 is communicated with the liquid storage cavity, and the other end of the liquid inlet valve 32 is communicated with the injection cavity. When in use, when liquid needs to be injected into the liquid storage cavity, the liquid inlet valve 32 is opened; during the pumping of the liquid, the intake valve 32 is closed.

Specifically, referring to fig. 1 to fig. 3, the liquid outlet mechanism 4 includes a liquid outlet valve 41 and a liquid outlet pipe 42, one end of the liquid outlet valve 41 is communicated with the injection cavity, and the other end of the liquid outlet valve 41 is connected to the liquid outlet pipe 42. In use, during pumping of liquid, it is necessary to open the outlet valve 41 to allow liquid to drain from the outlet pipe 42.

For better understanding of the present invention, the working process of the high-pressure micro-type liquid constant-speed transmission device provided by the present invention is described in detail below with reference to fig. 1 to 4: when the injection device is used, the liquid outlet valve 41 is closed and the liquid inlet valve 32 is opened, liquid in the liquid storage tank 31 is injected into the injection tube 11, the liquid inlet valve 32 is closed, the motor 21 is started, the motor 21 drives the screw rod 23 to rotate after speed reduction and torque increase through the speed reducer 22, the screw rod 23 applies acting force on the nut 24, the nut 24 moves rightwards due to the limit of the nut 24 by the limiting device 25, the push rod 26 fixedly connected with the nut is driven to move rightwards, the piston 12 is pushed to move rightwards, the liquid pressure in the injection cavity is increased, the liquid outlet valve 41 is opened, and liquid in the injection cavity is discharged from the liquid outlet pipe 42 for related experiments.

To sum up, the utility model discloses a reduction gear 22 falls the speed of lead screw 23 to required speed to drive nut 24 through lead screw 23 and remove, nut 24 drives push rod 26 and promotes piston 12, because whole mechanism's rate of motion is low, piston 12 area is little, and the mechanism advances the pressure that the in-process produced little, so can reach in the required time with the low speed requirement that promotes the medium and reach pressure.

The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A high-pressure micro-type liquid constant-speed transmission device is characterized by comprising: an accommodating mechanism, a propelling mechanism, an injecting mechanism and a liquid outlet mechanism,

2. The high-pressure micro-type liquid constant-speed transmission device according to claim 1, wherein the limiting means comprises a housing, a threaded sleeve and a connecting rod,

the shell is provided with an accommodating cavity, the shell and the injection tube are coaxially arranged and fixedly connected, a limiting groove communicated with the accommodating cavity is formed in the side wall of the shell, and the extending direction of the limiting groove is parallel to the axial direction of the injection tube;

the threaded sleeve is arranged in the accommodating cavity, is sleeved on the nut and is fixedly connected with the nut;

one end of the connecting rod is matched with the limiting groove and can slide along the limiting groove, and the other end of the connecting rod is fixedly connected with the threaded sleeve.

3. The high-pressure micro-liquid constant-speed transmission device according to claim 1, wherein the propelling mechanism further comprises a synchronous wheel and a synchronous belt, the synchronous wheel is sleeved on the screw rod and is fixedly connected with the screw rod, one end of the synchronous belt is connected with the synchronous wheel, and the other end of the synchronous belt is connected with the output end of the speed reducer.

4. The high-pressure micro-type liquid constant-speed transmission device according to claim 2, wherein the propelling mechanism further comprises a bearing, the bearing is sleeved on the screw rod, an inner ring of the bearing is fixedly connected with the screw rod, and an outer ring of the bearing is fixedly connected with the housing.

5. The high pressure micro liquid constant velocity transmission apparatus according to claim 2, further comprising a displacement measurer, the displacement measurer including a displacement measuring base and a movable displacement measuring end, the displacement measuring base being fixed to the housing, the movable displacement measuring end being fixedly connected to the connecting rod.

6. The high-pressure micro-type liquid constant-speed transmission device according to claim 1, wherein the injection mechanism comprises a liquid reservoir having a closed reservoir chamber and a liquid inlet valve having one end communicating with the reservoir chamber and the other end communicating with the injection chamber.

7. The high-pressure micro-type liquid constant-speed transmission device as claimed in claim 1, wherein the liquid outlet mechanism comprises a liquid outlet valve and a liquid outlet pipe, one end of the liquid outlet valve is communicated with the injection cavity, and the other end of the liquid outlet valve is connected with the liquid outlet pipe.