CN210716967U

CN210716967U - Liquid delivery device

Info

Publication number: CN210716967U
Application number: CN201921260676.9U
Authority: CN
Inventors: 汪永山; 王成海; 李庆; 彭军霞; 张玲
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-06-09
Anticipated expiration: 2029-08-06

Abstract

The utility model discloses a liquid conveying device belongs to the defeated technical field of collection. The device comprises a metering bin (1) and a piston (2); a liquid inlet (3) is arranged on the side wall of the metering bin (1), and a liquid outlet (4) is arranged at the bottom of the metering bin; the piston (2) is positioned in the metering bin (1), the piston (2) can reciprocate in the metering bin (1), and the difference between the diameter of the piston (2) and the inner diameter of the metering bin (1) is smaller than a preset value; when the piston (2) moves in the direction away from the liquid outlet (4) in the metering bin (1), the liquid flows into the metering bin (1) through the liquid inlet (3); when the piston (2) moves in the direction close to the liquid outlet (4) in the metering bin (1), the liquid in the metering bin (1) flows out through the liquid outlet (4). The utility model discloses when realizing the liquid measurement, can avoid liquid to solidify and occupy the measurement volume on the inner wall of measurement storehouse (1) to can guarantee the accuracy of liquid measurement.

Description

Liquid delivery device

Technical Field

The utility model relates to a defeated technical field of collection especially relates to a liquid conveying device.

Background

With the acceleration of industrialization, liquids such as crude oil are widely used. In the case of liquids, they are often transported during use. For example, crude oil may be sent to a processing plant for processing.

At present, it is possible to transport the liquid using a transport pipe and at the same time meter the liquid by means of a metering valve connected to the transport pipe. Specifically, the metering valve is connected between two sections of the conveying pipeline, liquid in one section of the conveying pipeline directly flows to the other section of the conveying pipeline through the metering valve, and the metering valve can meter the liquid when the liquid flows through the metering valve.

However, after the metering valve is used for a period of time, part of the liquid flowing through the metering valve may remain on the inner wall of the metering valve, thereby causing inaccurate subsequent metering of the liquid by the metering valve.

SUMMERY OF THE UTILITY MODEL

The utility model provides a liquid conveying device can solve the unsafe problem of liquid measurement among the correlation technique. The technical scheme is as follows:

in one aspect, there is provided a liquid delivery device, the device comprising: a metering bin and a piston;

a liquid inlet is formed in the side wall of the metering bin, a liquid outlet is formed in the bottom of the metering bin, and the metering bin is used for metering liquid flowing into the metering bin;

the piston is positioned in the metering bin and can reciprocate in the metering bin, and the difference between the diameter of the piston and the inner diameter of the metering bin is smaller than a preset value;

when the piston moves in the direction far away from the liquid outlet in the metering bin, the liquid flows into the metering bin through the liquid inlet; when the piston moves towards the direction close to the liquid outlet in the metering bin, the liquid in the metering bin flows out through the liquid outlet.

Optionally, the device further comprises a screw, a gear disc, a gear and a rotating rod;

the top of the metering bin is provided with a first through hole, the gear disc is provided with a second through hole, the second through hole is provided with threads, a first end of the screw rod is positioned inside the metering bin and connected with the piston, the screw rod penetrates through the first through hole on the metering bin and the second through hole on the gear disc, the screw rod is meshed with the threads on the second through hole, a second end of the screw rod is positioned outside the metering bin, and the screw rod is used for driving the piston to reciprocate in the metering bin;

the first end of dwang with gear connection, the teeth of a cogwheel of gear with the teeth of a cogwheel meshing of toothed disc, the dwang is used for driving the gear rotates.

Optionally, the apparatus further comprises a servo motor;

the servo motor with the second end of dwang is connected, servo motor is used for driving the dwang rotates.

Optionally, the device further comprises a housing;

the measuring bin the screw rod the toothed disc the gear with the first end of dwang all is located in the casing, be provided with the third through-hole on the casing, the dwang passes the third through-hole, the second end of dwang is located the casing is outside.

Optionally, the apparatus further comprises a first bearing;

the first bearing is connected with the inner wall of the shell, and the rotating rod penetrates through the through hole in the first bearing.

Optionally, the device further comprises a first fixation plate and a second fixation plate;

the first fixing plate and the second fixing plate are connected with the inner wall of the shell, and the gear disc is located in a space between the first fixing plate and the second fixing plate.

Optionally, the device further comprises a second bearing;

the first fixing plate is provided with a fourth through hole, the second bearing is located in the fourth through hole, and the rotating rod penetrates through the through hole in the second bearing.

Optionally, the apparatus further comprises a heating tube;

the heating pipe is connected with the inner wall of the shell.

Optionally, the apparatus further comprises a temperature sensor and a first controller;

the temperature sensor is located inside the shell, the temperature sensor is used for detecting the temperature in the shell, and the first controller is used for controlling the heating pipe to work according to the temperature detected by the temperature sensor.

Optionally, the device further comprises a first valve and a second valve;

the first valve is connected with the liquid inlet, and the second valve is connected with the liquid outlet.

Optionally, the apparatus further comprises a second controller;

the second controller is used for controlling the opening or closing of the first valve and controlling the opening or closing of the second valve.

Optionally, a portion of the metering bin close to the liquid outlet is shaped like a circular truncated cone, and a portion of the piston close to the liquid outlet is shaped like a circular truncated cone.

The utility model provides a technical scheme can bring following beneficial effect at least:

the liquid delivery device comprises a metering bin and a piston. The lateral wall of the metering bin is provided with a liquid inlet, the bottom of the metering bin is provided with a liquid outlet, and the metering bin is used for metering liquid flowing into the metering bin. The piston is located the inside in measurement storehouse, and the piston can carry out reciprocating motion in the measurement storehouse, and the difference between the diameter of piston and the internal diameter in measurement storehouse is less than predetermineeing numerical value. When the piston moves towards the direction far away from the liquid outlet in the metering bin, liquid flows into the metering bin through the liquid inlet, and when the piston moves towards the direction close to the liquid outlet in the metering bin, the liquid in the metering bin flows out through the liquid outlet. So, when carrying liquid through liquid conveyor, can with the piston in the measurement storehouse to the direction motion of keeping away from the liquid outlet, because atmospheric pressure effect, liquid flows into the measurement storehouse through the inlet in, through the lifting height of control piston in the measurement storehouse this moment, can control the liquid volume that flows into in the measurement storehouse, realizes the liquid measurement. Afterwards, when liquid needs to be discharged, the piston moves towards the direction close to the liquid outlet in the metering bin, and at the moment, the liquid in the metering bin flows out from the liquid outlet due to the extrusion force of the piston, so that the quantitative conveying of the liquid can be realized. Because the difference between the diameter of piston and the internal diameter in measurement storehouse is less than and predetermines numerical value, so the piston is comparatively inseparable with the inner wall laminating in measurement storehouse, therefore will not have liquid to remain on the inner wall in measurement storehouse after coming liquid discharge through the motion of piston in measurement storehouse to can avoid liquid to solidify and occupy the measurement volume on the inner wall in measurement storehouse, and then can guarantee that the measurement storehouse can accurately carry out the liquid measurement all the time.

Drawings

Fig. 1 is a schematic structural diagram of a first liquid conveying device provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second liquid conveying device provided by the embodiment of the present invention;

fig. 3 is a top view of a gear plate according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a third liquid conveying apparatus provided in the embodiment of the present invention;

fig. 5 is a schematic structural diagram of a fourth liquid conveying apparatus provided in the embodiment of the present invention;

fig. 6 is a top view of a first fixing plate according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a fifth liquid conveying apparatus provided in the embodiment of the present invention;

fig. 8 is a schematic structural diagram of a sixth liquid conveying apparatus provided in the embodiment of the present invention;

fig. 9 is a schematic structural diagram of a seventh liquid conveying apparatus according to an embodiment of the present invention.

Reference numerals:

1: metering bin, 2: piston, 3: liquid inlet, 4: a liquid outlet, 5: screw, 51: first end of screw, 52: second end of screw, 6: gear disc, 7: gear, 8: rotating lever, 81: first end of rotating rod, 82: second end of the swivelling lever, 9: thread, 10: servo motor, 11: a housing, 12: first bearing, 13: first fixing plate, 14: second fixing plate, 15: second bearing, 16: heating pipe, 17: temperature sensor, 18: first controller, 19: first valve, 20: second valve, 21: a second controller.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a liquid conveying apparatus according to an embodiment of the present invention. Referring to fig. 1, the apparatus includes: a metering chamber 1 and a piston 2.

The lateral wall of measurement storehouse 1 is provided with liquid inlet 3, and the bottom of measurement storehouse 1 is provided with liquid outlet 4, and measurement storehouse 1 is used for measuring the liquid that flows into in measurement storehouse 1. The piston 2 is located the inside of measurement storehouse 1, and piston 2 can carry out reciprocating motion in measurement storehouse 1, and the difference between the diameter of piston 2 and the internal diameter of measurement storehouse 1 is less than preset numerical value. When the piston 2 moves in the metering bin 1 in the direction far away from the liquid outlet 4, liquid flows into the metering bin 1 through the liquid inlet 3; when the piston 2 moves towards the direction close to the liquid outlet 4 in the metering bin 1, the liquid in the metering bin 1 flows out through the liquid outlet 4.

The measuring chamber 1 is a member for storing and measuring a liquid, which may be crude oil or the like. The size, material, etc. of the measuring bin 1 can be preset according to the use requirement, for example, the material of the measuring bin 1 can be stainless steel, alloy, etc.

In addition, the piston 2 can control the inflow and outflow of the liquid in the measuring chamber 1, and the material of the piston 2 may be a wear-resistant material, for example, the material of the piston 2 may be rubber, wear-resistant alloy, or the like.

Moreover, the preset value can be preset, and the preset value can be set to be smaller. For example, the preset value may be 0.1mm (millimeter), 0.2mm, or the like.

Specifically, when carrying liquid through liquid conveyor, can be earlier with piston 2 in measuring storehouse 1 to the direction motion of keeping away from liquid outlet 4, because the atmospheric pressure effect, liquid flows into measuring storehouse 1 through inlet 3 in, through the lifting height of control piston 2 in measuring storehouse 1 this moment, can control the liquid volume that flows into in measuring storehouse 1, realizes the liquid measurement. Afterwards, when liquid needs to be discharged, the piston 2 moves in the metering bin 1 to a direction close to the liquid outlet 4, and at the moment, the liquid in the metering bin 1 flows out from the liquid outlet 4 due to the extrusion force of the piston 2, so that quantitative conveying of the liquid can be realized. Because the difference between the diameter of piston 2 and the internal diameter of measurement storehouse 1 is less than and predetermines numerical value, so the inner wall laminating of piston 2 and measurement storehouse 1 is comparatively inseparable, therefore will have liquid to remain on the inner wall of measurement storehouse 1 after coming liquid discharge through the motion of piston 2 in measurement storehouse 1, thereby can avoid liquid to solidify and occupy the measurement volume on the inner wall of measurement storehouse 1, and then can guarantee that measurement storehouse 1 can accurately carry out the liquid measurement all the time.

Further, as shown in fig. 2 and 3, the device may further include a screw 5, a gear plate 6, a gear 7, and a rotating lever 8.

The top of measurement storehouse 1 is provided with first through-hole, be provided with the second through-hole on the toothed disc 6, be provided with screw thread 9 on the second through-hole, the first end 51 of screw rod 5 is located the inside of measurement storehouse 1 and is connected with piston 2, screw rod 5 passes the first through-hole on the measurement storehouse 1 and the second through-hole on the toothed disc 6, screw rod 5 meshes with screw thread 9 on the second through-hole, the second end 52 of screw rod 5 is located the outside of measurement storehouse 1, screw rod 5 is used for driving piston 2 and carries out reciprocating motion in measurement storehouse 1. The first end 81 of the rotating rod 8 is connected with the gear 7, the gear teeth of the gear 7 are meshed with the gear teeth of the gear disc 6, and the rotating rod 8 is used for driving the gear 7 to rotate.

It should be noted that, the aperture of the first through hole and the aperture of the second through hole may be slightly larger than the diameter of the screw rod 5, as long as it is ensured that the screw rod 5 can just pass through the first through hole and the second through hole, and the screw rod 5 can be engaged with the thread 9 on the second through hole, the embodiment of the present invention is not specifically limited to this.

In addition, the first end 51 of the screw 5 may be connected to the piston 2 in various ways, for example, welding, bonding, etc., and of course, the first end 51 of the screw 5 may also be connected to the piston 2 through a rotating seat, as long as it is ensured that the screw 5 can drive the piston 2 to reciprocate in the metering bin 1. The first end 81 of the rotating rod 8 can be connected to the gear 7 in various ways, for example, by welding, bonding, etc., as long as it is ensured that the rotating rod 8 can drive the gear 7 to rotate.

Thus, the rotating rod 8 can drive the gear 7 to rotate when rotating. Because the teeth of the gear 7 are engaged with the gear of the gear disc 6, the gear 7 rotates to drive the gear disc 6 to rotate. Because the thread 9 on the second through hole on the gear wheel 6 is engaged with the screw 5, the screw 5 is driven to move upwards or downwards by the rotation of the gear wheel 6. Since the first end 51 of the screw 5 is connected to the piston 2, the screw 5 moving up or down will drive the piston 2 to move up or down in the metering chamber 1, so that the piston 2 can reciprocate in the metering chamber 1.

In addition, since the first end 51 of the screw 5 is connected to the piston 2, when the piston 2 moves in the metering bin 1 in a direction away from the liquid outlet 4, the lifting height of the piston 2 in the metering bin 1 is the lifting height of the screw 5, and at this time, by controlling the lifting height of the screw 5, the volume of the liquid flowing into the metering bin 1 can be controlled, so as to realize liquid metering. And because the movement of the screw rod 5 is caused by the rotation of the rotating rod 8, the lifting height of the screw rod 5 can be controlled by controlling the rotating direction, the rotating speed and the rotating time of the rotating rod 8, and the volume of the liquid flowing into the metering bin 1 can be controlled, so that the liquid metering is realized.

Further, as shown in fig. 4, the apparatus may further include a servo motor 10. The servo motor 10 is connected to the second end 82 of the rotating rod 8, and the servo motor 10 is used for driving the rotating rod 8 to rotate.

It should be noted that the servo motor 10 may convert the voltage signal into a torque and a rotation speed to drive the control object, and the servo motor 10 may include a rotor and a stator. Wherein the rotor can be connected with the second end 82 of the rotating rod 8 to drive the rotating rod 8 to rotate, and the rotating speed of the rotor is controlled by the input signal.

Like this, servo motor 10 can drive dwang 8 and rotate, and servo motor 10 can control the rotation direction, slew velocity and the rotation time of dwang 8 to can control the promotion height of screw rod 5, just also can control the liquid volume that flows into in the measurement storehouse 1, realize the liquid measurement.

Of course, in practical application, the rotating rod 8 may also be driven to rotate by other devices, and the embodiment of the present invention does not limit this.

Further, as shown in fig. 5, the device may further include a housing 11.

First ends 81 of the metering bin 1, the screw 5, the gear disc 6, the gear 7 and the rotating rod 8 are all located in the shell 11, a third through hole is formed in the shell 11, the rotating rod 8 penetrates through the third through hole, and a second end 82 of the rotating rod 8 is located outside the shell.

It should be noted that, the material and the size of the housing 11 may be preset, as long as the first ends 81 of the measuring bin 1, the screw 5, the gear disc 6, the gear 7 and the rotating rod 8 are located in the housing 11, and the embodiment of the present invention is not specifically limited to this.

In addition, a central position of the top surface of the housing 11 may be provided with a through hole, which may be positioned directly above the screw 5, and the diameter of which may be greater than that of the screw 5, thereby facilitating the upward movement of the screw 5. The servo motor 10 may be placed on the top surface of the housing 11 and fixedly coupled to the top surface of the housing 11.

Furthermore, because the first end 81 of the measuring bin 1, the screw 5, the gear disc 6, the gear 7 and the rotating rod 8 is located in the shell 11, the first end 81 of the measuring bin 1, the screw 5, the gear disc 6, the gear 7 and the rotating rod 8 can be isolated from the external environment, and the service lives of the measuring bin 1, the screw 5, the gear disc 6, the gear 7 and the rotating rod 8 are prolonged.

Optionally, as shown in fig. 5, the device may further comprise a first bearing 12. The first bearing 12 is connected with the inner wall of the housing 11, and the rotating rod 8 passes through a through hole of the first bearing 12.

The first bearing 12 may be a pressure bearing, and for example, the first bearing 12 may be a self-aligning ball bearing, a cylindrical roller bearing, or the like. The inner diameter of the first bearing 12 may be slightly larger than the diameter of the rotating rod 8, for example, the inner diameter of the first bearing 12 may be 18mm, etc., as long as it is ensured that the rotating rod 8 can pass through the through hole of the first bearing 12.

Like this, because dwang 8 passes the through-hole on first bearing 12, and the inner wall of first bearing 12 and casing 11 is connected, so the position of dwang 8 can be restricted by first bearing 12 to can prevent effectively that dwang 8 from taking place the shake in the rotation process, improve operating efficiency, and dwang 8 when rotating, also less with the frictional force between first bearing 12.

Optionally, as shown in fig. 5, the apparatus may further include a first fixing plate 13 and a second fixing plate 14.

The first fixing plate 13 and the second fixing plate 14 are both connected with the inner wall of the housing 11, and the gear plate 6 is located in a space between the first fixing plate 13 and the second fixing plate 14.

The dimensions, materials, and the like of the first fixing plate 13 and the second fixing plate 14 may be preset according to the use requirements, and for example, the materials of the first fixing plate 13 and the second fixing plate 14 may be stainless steel, alloy, and the like.

In addition, the height of the space between the first fixing plate 13 and the second fixing plate 14 is slightly different from the thickness of the gear plate 6, and may be different by 0.1mm, 0.2mm, or the like, for example. Moreover, the first fixing plate 13 may be provided with a through hole, the second fixing plate 14 may also be provided with a through hole, the two through holes provided on the first fixing plate 13 and the second fixing plate 14 are both opposite to the second through hole on the gear plate 6, and at this time, the screw 5 may sequentially pass through the through hole on the first fixing plate 13, the second through hole on the gear plate 6, and the through hole on the second fixing plate 14.

Furthermore, since the first fixing plate 13 and the second fixing plate 14 are both connected to the inner wall of the housing 11, the positions of the first fixing plate 13 and the second fixing plate 14 are fixed, thereby ensuring that the gear plate 6 located in the space between the first fixing plate 13 and the second fixing plate 14 is fixed.

It should be noted that lubricating oil may be applied to the surface of the gear wheel 6, the plate surface of the first fixing plate 13, and the plate surface of the second fixing plate 14 to reduce the friction between the gear wheel 6 and the first fixing plate 13 and the second fixing plate 14 during rotation.

Optionally, as shown in fig. 6, the device may further comprise a second bearing 15.

A fourth through hole is formed in the first fixing plate 13, the second bearing 15 is located in the fourth through hole, and the rotating rod 8 penetrates through the through hole in the second bearing 15.

The second bearing 15 may be a pressure bearing, and for example, the second bearing 15 may be a self-aligning ball bearing, a cylindrical roller bearing, or the like. The inner diameter of the second bearing 15 may be slightly larger than the diameter of the swivelling lever 8, for example the inner diameter of the second bearing 15 may be 18mm or the like, as long as it is ensured that the swivelling lever 8 can pass through the through-hole in the second bearing 15.

In addition, since the gear plate 6 is located in the space between the first and

second fixing plates

13 and 14, and the teeth of the gear 7 are engaged with the teeth of the gear plate 6, the gear 7 is also located in the space between the first and

second fixing plates

13 and 14 at this time. Thus, a fourth through hole is provided in the first fixing plate 13, which facilitates the connection of the rotating lever 8 with the gear wheel 7 through the through hole in the second bearing 15 located in the fourth through hole. In this case, the friction force between the pivot lever 8 and the second bearing 15 is small when the pivot lever is pivoted.

Optionally, as shown in fig. 7, the apparatus may further include a heating tube 16; the heating pipe 16 is connected to the inner wall of the housing 11.

It should be noted that the heating pipe 16 is a member for heating, and the number of the heating pipes 16 may be one or more. The size, material, etc. of the heating pipe 16 may be preset according to the use requirement, for example, the material of the heating pipe 16 may be a carbon steel pipe, a titanium pipe, a stainless steel pipe, etc.

It is worth mentioning that when the outside air temperature is low, the temperature inside the housing 11 will also be low, which results in the liquid being liable to solidify inside the dosing chamber 1. At this moment, can adopt heating pipe 16 to heat the inside air of casing 11, make the inside temperature of casing 11 be in a reasonable temperature range to can ensure that liquid can not solidify because the temperature is low excessively, guarantee the mobility of liquid, and then can avoid the liquid of solidifying to block up inlet 3 or the liquid outlet 4 of measurement storehouse 1, ensure the device's normal operating.

Optionally, as shown in fig. 7, the apparatus may further include a temperature sensor 17 and a first controller 18. A temperature sensor 17 is located inside the housing 11, the temperature sensor 17 is used for detecting the temperature inside the housing 11, and a first controller 18 is used for controlling the heating pipe 16 to work according to the temperature detected by the temperature sensor 17.

It should be noted that the temperature sensor 17 may be a thermocouple, a thermistor, a resistance temperature detector, and the like, as long as the function of detecting temperature is achieved, and the embodiment of the present invention is not particularly limited to this. Since the temperature sensor 17 is located inside the housing 11, the temperature detected by the temperature sensor 17 is the temperature inside the housing 11.

In addition, the first controller 18 may be a logic controller, a micro-program controller, or the like, and the embodiment of the present invention is not limited thereto. For example, the first controller 18 may be a PLC (Programmable logic controller).

Furthermore, the output end of the temperature sensor 17 is electrically connected to the input end of the first controller 18, and the output end of the first controller 18 is electrically connected to the input end of the heating pipe 16.

Specifically, the temperature sensor 17 may detect the temperature inside the housing 11 in real time and transmit the detected temperature to the first controller 18; when the first controller 18 determines that the temperature detected by the temperature sensor 17 is less than or equal to the reference temperature, the heating pipe 16 is controlled to be heated such that the temperature inside the housing 11 is gradually increased. Thereafter, when the first controller 18 determines that the temperature detected by the temperature sensor 17 is within the preset temperature range, the heating pipe 16 may be controlled to stop heating. Therefore, the temperature inside the shell 11 can be ensured to be within the preset temperature range, and the liquid can not be solidified due to too low temperature.

It should be noted that, the reference temperature and the preset temperature range may be preset, for example, the reference temperature may be 25 ℃, and the preset temperature range may be 30 ℃ to 40 ℃.

Optionally, as shown in fig. 8, the device may further comprise a first valve 19 and a second valve 20; the first valve 19 is connected to the inlet port 3 and the second valve 20 is connected to the outlet port 4.

It should be noted that the first valve 19 is used for controlling the opening and closing of the liquid inlet 3, the second valve 20 is used for controlling the opening and closing of the liquid outlet 4, and the types of the first valve 19 and the second valve 20 can be preset according to the use requirement, for example, the first valve 19 and the second valve 20 can be electrically controlled ball valves and the like.

In addition, the first valve 19 may be connected between the liquid inlet pipe and the liquid inlet 3, and a through hole may be formed in the housing 11, through which the liquid inlet pipe may pass to connect with the first valve 19. The second valve 20 may be connected between the liquid outlet 4 and the liquid outlet pipe, and a through hole may be formed in the housing 11, and the liquid outlet pipe may pass through the through hole and be connected to the second valve 20.

Specifically, when liquid delivery is performed, the first valve 19 can be controlled to be opened, the second valve 20 is controlled to be closed, and the liquid in the liquid inlet pipeline flows into the metering bin 1 through the liquid inlet 3. The first valve 19 can then be controlled to close and the second valve 20 to open, and the liquid in the dosing chamber 1 will flow through the outlet opening 4 into the outlet conduit. Thus, the flow of liquid into and out of the dosing chamber 1 can be controlled by the opening and closing of the first valve 19 and the second valve 20.

Optionally, as shown in fig. 8, the apparatus further comprises a second controller 21. The second controller 21 is used to control the opening or closing of the first valve 19 and the opening or closing of the second valve 20.

It should be noted that the second controller 21 may be a logic controller, a micro-program controller, and the like, and the embodiment of the present invention is not limited to this specifically. For example, the second controller 21 may be a PLC. Meanwhile, the second controller 21 may be the same controller as the first controller 18 or may be a different controller from the first controller 18.

Thus, when the second controller 21 controls the first valve 19 to open and the second valve 20 to close, the liquid flows into the metering chamber 1 through the liquid inlet 3, and when the second controller 21 controls the first valve 19 to close and the second valve 20 opens, the liquid in the metering chamber 1 flows out of the metering chamber 1 through the liquid outlet 4.

It is noted that the second controller 21 may also control the rotation of the swivelling levers 8. When the second controller 21 controls the first valve 19 to be opened and the second valve 20 to be closed, the second controller 21 simultaneously controls the rotating rod 8 to rotate in the forward direction, the rotating rod 8 drives the gear disc 6 to rotate in the forward direction through the gear 7, the gear disc 6 drives the screw rod 5 to ascend after rotating in the forward direction, then the screw rod 5 drives the piston 2 to ascend, and at the moment, liquid enters the metering bin 1 through the liquid inlet 3. When the second controller 21 controls the first valve 19 to close and the second valve 20 to open, the second controller 21 simultaneously controls the rotating rod 8 to rotate reversely, the rotating rod 8 drives the gear disc 6 to rotate reversely through the gear 7, the gear disc 6 drives the screw rod 5 to move downwards after rotating reversely, then the screw rod 5 drives the piston 2 to move downwards, and at the moment, the liquid in the metering bin 1 flows out of the metering bin 1 through the liquid outlet 4.

In addition, when the second controller 21 controls the rotation of the rotation lever 8, the rotation of the rotation lever 8 can be controlled by controlling the rotation of the rotor in the servo motor 10. The second controller 21 can control the rotation direction, rotation speed and rotation time of the rotor in the servo motor 10 to control the rotation direction, rotation speed and rotation time of the rotating rod 8, so that the lifting height of the screw rod 5 can be controlled, the volume of the liquid flowing into the metering bin 1 can be controlled, and the liquid metering is realized.

Optionally, the shape of the portion of the metering bin 1 close to the liquid outlet 4 matches the shape of the portion of the piston 2 close to the liquid outlet 4, so that the portion of the metering bin 1 close to the liquid outlet 4 and the portion of the piston 2 close to the liquid outlet 4 can be attached to each other more closely, and liquid can be discharged conveniently. For example. As shown in fig. 1, the portion of the dosing chamber 1 near the liquid outlet 4 is shaped like a circular truncated cone, and the portion of the piston 2 near the liquid outlet 4 is shaped like a circular truncated cone.

It should be noted that, the shape of the portion close to the liquid outlet 4 in the metering bin 1 and the shape of the portion close to the liquid outlet 4 in the piston 2 are both circular truncated cone shapes, which can play a role in guiding, so that the liquid in the metering bin 1 is converged to the liquid outlet 4, so that the liquid in the metering bin 1 is completely flowed out from the liquid outlet 4, and no liquid is remained on the inner wall of the metering bin 1.

It should be noted that, in the embodiment of the present invention, the number of the liquid inlets 3 disposed on the side wall of the metering bin 1 may be one or more. For example, as shown in FIG. 9, two liquid inlets 3 are provided on the side wall of the metering chamber 1. In this case, the liquid feeding means may comprise two first valves 19, the two first valves 19 being connected to the two inlet ports 3.

For ease of understanding, the operation of the liquid delivery apparatus is illustrated below.

Referring to fig. 9, in use, the liquid delivery device is powered on, and in an initial state, the bottom surface of the piston 2 is in contact with the inner bottom surface of the metering chamber 1, and the second controller 21 sets the rotation direction, the rotation time and the rotation speed of the rotor in the servo motor 10. When the metering suction is performed, the second controller 21 controls the first valve 19 to open, the second valve 20 to close, and the servo motor 10 drives the rotating rod 8 to rotate in the forward direction. The rotating rod 8 drives the gear disc 6 to rotate forward through the gear 7, the gear disc 6 drives the screw rod 5 to ascend after rotating forward, and the screw rod 5 drives the piston 2 to ascend. At this moment, because the atmospheric pressure effect, liquid gets into the measuring bin 1 inside through inlet 3, sets for the slew velocity and the rotation time of the rotor in servo motor 10 through second controller 21 and can control the lift height of piston 2, just also can control the liquid volume that flows into in the measuring bin 1, realizes the liquid measurement. When the liquid after need will measuring is discharged, the first valve 19 of second controller 21 control is closed, second valve 20 is opened, servo motor 10 drives dwang 8 antiport, make piston 2 downstream, extrude the liquid that absorbs in the measurement storehouse 1 entirely, so make liquid transport realize the quantification, and after the liquid ration was discharged, liquid does not remain on the inner wall of measurement storehouse 5, avoided liquid to solidify and taken up the measurement volume on measurement storehouse 5 inner wall, guaranteed the accuracy of measurement. Meanwhile, the volume of the liquid can be controlled and measured by the second controller 21, so that the liquid measurement is more humanized and more convenient to use.

In addition, when the temperature inside the housing 11 is low, the first controller 18 can control the heating pipe 16 to heat if the temperature inside the housing 11 is low, so that the temperature inside the housing 11 will gradually increase. Thereafter, when the temperature inside the housing 11 is within the preset temperature range, the first controller 18 may control the heating pipe 16 to stop heating. Therefore, the temperature inside the shell 11 can be ensured to be within the preset temperature range, the liquid is ensured not to be solidified due to too low temperature, the liquidity of the liquid is ensured, the first valve 19 and the second valve 20 are prevented from being blocked by the solidified liquid, and the normal operation of the liquid conveying device is ensured.

In the embodiment of the present invention, the liquid conveying device includes a metering chamber 1 and a piston 2. The lateral wall of measurement storehouse 1 is provided with liquid inlet 3, and the bottom of measurement storehouse 1 is provided with liquid outlet 4, and measurement storehouse 1 is used for measuring the liquid that flows into in measurement storehouse 1. The piston 2 is located the inside of measurement storehouse 1, and piston 2 can carry out reciprocating motion in measurement storehouse 1, and the difference between the diameter of piston 2 and the internal diameter of measurement storehouse 1 is less than preset numerical value. When piston 2 moves to the direction of keeping away from liquid outlet 4 in measurement storehouse 1, liquid flows into measurement storehouse 1 through inlet 3 in, and when piston 2 moves to the direction of being close to liquid outlet 4 in measurement storehouse 1, the liquid in measurement storehouse 1 flows out through liquid outlet 4. So, when carrying liquid through liquid conveyor, can be earlier with piston 2 in measuring storehouse 1 to the direction motion of keeping away from liquid outlet 4, because the atmospheric pressure effect, liquid passes through in inlet 3 inflow measuring storehouse 1, through the lifting height of control piston 2 in measuring storehouse 1 this moment, can control the liquid volume that flows into in measuring storehouse 1, realizes the liquid measurement. Afterwards, when liquid needs to be discharged, the piston 2 moves in the metering bin 1 to a direction close to the liquid outlet 4, and at the moment, the liquid in the metering bin 1 flows out from the liquid outlet 4 due to the extrusion force of the piston 2, so that quantitative conveying of the liquid can be realized. Because the difference between the diameter of piston 2 and the internal diameter of measurement storehouse 1 is less than and predetermines numerical value, so the inner wall laminating of piston 2 and measurement storehouse 1 is comparatively inseparable, therefore will have liquid to remain on the inner wall of measurement storehouse 1 after coming liquid discharge through the motion of piston 2 in measurement storehouse 1, thereby can avoid liquid to solidify and occupy the measurement volume on the inner wall of measurement storehouse 1, and then can guarantee that measurement storehouse 1 can accurately carry out the liquid measurement all the time.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A liquid delivery device, the device comprising: a metering bin (1) and a piston (2);

a liquid inlet (3) is formed in the side wall of the metering bin (1), a liquid outlet (4) is formed in the bottom of the metering bin (1), and the metering bin (1) is used for metering liquid flowing into the metering bin (1);

the piston (2) is positioned inside the metering bin (1), the piston (2) can reciprocate in the metering bin (1), and the difference between the diameter of the piston (2) and the inner diameter of the metering bin (1) is smaller than a preset value;

when the piston (2) moves in the direction away from the liquid outlet (4) in the metering bin (1), liquid flows into the metering bin (1) through the liquid inlet (3); piston (2) are in metering bin (1) is to being close to when the direction motion of liquid outlet (4), liquid in metering bin (1) passes through liquid outlet (4) flow.

2. The device according to claim 1, characterized in that it further comprises a screw (5), a toothed disc (6), a gear (7) and a rotating rod (8);

the top of the metering bin (1) is provided with a first through hole, the gear disc (6) is provided with a second through hole, the second through hole is provided with a thread (9), a first end (51) of the screw rod (5) is positioned inside the metering bin (1) and connected with the piston (2), the screw rod (5) penetrates through the first through hole on the metering bin (1) and the second through hole on the gear disc (6), the screw rod (5) is meshed with the thread (9) on the second through hole, a second end (52) of the screw rod (5) is positioned outside the metering bin (1), and the screw rod (5) is used for driving the piston (2) to reciprocate in the metering bin (1);

first end (81) of dwang (8) with gear (7) are connected, the teeth of a cogwheel of gear (7) with the teeth of a cogwheel meshing of toothed disc (6), dwang (8) are used for driving gear (7) rotate.

3. The device according to claim 2, characterized in that it further comprises a servomotor (10);

servo motor (10) with the second end (82) of dwang (8) are connected, servo motor (10) are used for driving dwang (8) rotate.

4. The device according to claim 2, characterized in that it further comprises a housing (11);

metering bin (1), screw rod (5) toothed disc (6), gear (7) with first end (81) of dwang (8) all are located in casing (11), be provided with the third through-hole on casing (11), dwang (8) are passed the third through-hole, second end (82) of dwang (8) are located the casing is outside.

5. The device according to claim 4, characterized in that it further comprises a first bearing (12);

first bearing (12) with the inner wall of casing (11) is connected, dwang (8) pass through the through-hole on first bearing (12).

6. The device according to claim 4, characterized in that it further comprises a first fixing plate (13) and a second fixing plate (14);

the first fixing plate (13) and the second fixing plate (14) are connected with the inner wall of the shell (11), and the gear disc (6) is located in a space between the first fixing plate (13) and the second fixing plate (14).

7. The device according to claim 6, characterized in that it further comprises a second bearing (15);

be provided with the fourth through-hole on first fixed plate (13), second bearing (15) are located in the fourth through-hole, dwang (8) pass through-hole on second bearing (15).

8. The device according to claim 4, characterized in that it further comprises a heating tube (16);

the heating pipe (16) is connected with the inner wall of the shell (11).

9. The device according to claim 8, characterized in that it further comprises a temperature sensor (17) and a first controller (18);

the temperature sensor (17) is located inside the shell (11), the temperature sensor (17) is used for detecting the temperature inside the shell (11), and the first controller (18) is used for controlling the heating pipe (16) to work according to the temperature detected by the temperature sensor (17).

10. The device according to claim 1, characterized in that it further comprises a first valve (19) and a second valve (20);

the first valve (19) is connected with the liquid inlet (3), and the second valve (20) is connected with the liquid outlet (4).

11. The apparatus according to claim 10, characterized in that it further comprises a second controller (21);

the second controller (21) is used for controlling the opening or closing of the first valve (19) and controlling the opening or closing of the second valve (20).

12. The device according to any of the foregoing claims from 1 to 11, characterised in that the portion of the dosing chamber (1) adjacent to the outlet orifice (4) is frustoconical and the portion of the piston (2) adjacent to the outlet orifice (4) is frustoconical.