Paste conveying mechanism and system for feeding back flow

Abstract

The utility model provides a pasty fluid conveying mechanism and a pasty fluid conveying system for feeding back flow, and relates to the field of pasty fluid conveying. The separation unit is arranged in the first container in a sliding mode and divides the first container into a left cavity and a right cavity, the left cavity is communicated with a first feeding branch with a valve and a first discharging branch with a valve, the right cavity is communicated with a second feeding branch with a valve and a second discharging branch with a valve, the first discharging branch and the second discharging branch are converged to a discharging main path, and the discharging main path is communicated with the first feeding branch and the second discharging branch. A pressure detection unit and a flow adjusting unit are arranged on the main discharging path, the pressure detection unit is arranged on the upstream of the flow adjusting unit, and the detection unit is used for detecting the volume change rate of the left cavity and / or the right cavity; the paste conveying mechanism comprises a first state and a second state, the volume change of the left chamber and the right chamber is realized by switching the paste conveyor to be in different states, and the actual flow of the current paste is fed back through the rate of the volume change.

Description

Technical Field

[0001] The utility model relates to the field of paste conveying, in particular to a paste conveying mechanism and a conveying system for feedback flow rate. Background Art

[0002] When producing various chemicals, various liquids, powders and pastes need to be fed into the mixing system in proportion to obtain qualified finished products. For pastes, the pastes are continuously fed through a press and a metering pump. The metering pump is prone to wear due to long-term operation, resulting in errors in the amount of paste added, affecting the quality and performance of the finished product. Utility Model Content

[0003] The utility model provides a paste conveying mechanism and a conveying system for feedback flow, and its purpose is to provide a device with real-time feedback flow, which can timely adjust the flow of a metering pump when an error occurs in the metering pump.

[0004] In order to achieve the above-mentioned object, an embodiment of the utility model provides a paste delivery mechanism for feedback flow, comprising:

[0005] a first container;

[0006] a partition unit, slidably disposed in the first container and dividing the first container into a left chamber and a right chamber, the left chamber being connected with a first feed branch and a first discharge branch, the right chamber being connected with a second feed branch and a second discharge branch, the first discharge branch and the second discharge branch converging into the discharge main passage, the discharge main passage being provided with a pressure detection unit and a flow regulating unit, the pressure detection unit being disposed upstream of the flow regulating unit, the first feed branch being provided with a first feed valve, the first discharge branch being provided with a first discharge valve, the second feed branch being provided with a second feed valve, and the second discharge branch being provided with a second discharge valve;

[0007] A detection unit, used to detect the volume change rate of the left chamber and / or the right chamber;

[0008] The paste conveying mechanism includes a first state and a second state. When the paste conveying mechanism is in the first state, the first feed valve and the second discharge valve are opened, and the first discharge valve and the second feed valve are closed; when the paste conveyor is in the second state, the first feed valve and the second discharge valve are closed, and the first discharge valve and the second feed valve are opened.

[0009] Preferably, the paste delivery mechanism further comprises a control unit, which is respectively connected to the first feed valve, the second feed valve, the first discharge valve, and the second discharge valve by signal; the control unit sends opening and closing instructions to the first feed valve, the second feed valve, the first discharge valve, and the second discharge valve respectively;

[0010] The control unit is also connected to the detection unit by signal, and the detection unit sends the detection result of the detection unit to the control unit;

[0011] The control unit is also signal-connected to the pressure detection unit and the flow regulation unit. The pressure detection unit detects the paste feeding pressure before the paste enters the flow regulation unit and feeds back the paste feeding pressure to the control unit. The control unit adjusts the rotation speed of the flow regulation unit based on the detection result of the detection unit.

[0012] Preferably, a sliding rod is provided on one side of the partition unit, one end of the sliding rod is fixed on the partition unit, and the other end is passed through the first container, and the sliding rod moves in the left and right direction under the action of the partition unit;

[0013] The detection unit is arranged outside the first container and is used for detecting the movement speed of the sliding rod.

[0014] Preferably, the first container is a piston cylinder, the partition unit is a piston, and the sliding rod is arranged on the piston.

[0015] Preferably, a marking unit for detection by a detection unit is provided on a side of the sliding rod where it passes through.

[0016] Preferably, the detection unit is an electronic ruler, which is arranged outside the first container and located above the movement path of the sliding rod.

[0017] Preferably, the first feed valve, the second feed valve, the first discharge valve and the second discharge valve are all pneumatic ball valves.

[0018] Preferably, the flow regulating unit is a metering pump, and the pressure detecting unit is a pressure sensor.

[0019] Preferably, the partition unit is provided with another sliding rod on the other side, and the two sliding rods are symmetrically arranged with respect to the partition unit.

[0020] The present application also provides a delivery system, comprising:

[0021] The aforementioned paste delivery mechanism;

[0022] A second container for holding the paste, wherein the second container is provided with a main feed path, and the main feed path is connected with the first feed branch path and the second feed branch path;

[0023] The pressing machine is used to provide initial pressure to the paste in the second container.

[0024] The above solution of the utility model has the following beneficial effects:

[0025] In the present application, a first container is provided and the first container is divided into two chambers by a partition unit. The detection unit is used to detect the volume change rate of the two chambers to accurately calculate the actual paste flow rate, and the comparison result is obtained by comparing it with the theoretical paste flow rate. The speed of the metering pump is adjusted according to the comparison result to meet the theoretical flow rate requirement. At the same time, the total amount of paste added can be obtained by recording the number of volume changes of the left and right chambers.

[0026] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of a paste delivery mechanism;

[0028] Figure 2 is a schematic diagram of the conveying system.

[0029] [Description of Reference Numerals]

[0030] 11. first container; 12. partition unit; 121. slide bar; 122. marking unit;

[0031] 21. first feed branch; 211. first feed valve; 22. first discharge branch; 221. first discharge valve; 23. second feed branch; 231. second feed valve; 241. second discharge valve; 24. second discharge branch; 25. discharge main channel; 26. pressure detection unit; 27. flow regulating unit;

[0032] 31. Detection unit;

[0033] 41. Second container; 42. Main feeding line; 43. Pressing machine. DETAILED DESCRIPTION

[0034] In order to make the technical problems to be solved, technical solutions and advantages of the present invention more clear, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0035] like Figure 1As shown, an embodiment of the utility model provides a paste delivery mechanism for feedback flow, including a first container 11, a partition unit 12 is arranged in the first container 11, the partition unit 12 is slidably arranged in the cavity of the first container 11, and the first container 11 is divided into a left chamber and a right chamber, when the partition unit 12 moves left and right, the volume of the left chamber and the right chamber changes with the movement of the partition unit 12. The left chamber is connected with a first feed branch 21 and a first discharge branch 22, and the right chamber is connected with a second feed branch 23 and a second discharge branch 24, and the first discharge branch 22 and the second discharge branch 24 converge into a discharge main channel 25. A pressure detection unit 26 and a flow regulating unit 27 are arranged on the discharge main channel 25, and the pressure detection unit 26 is arranged upstream of the flow regulating unit 27.

[0036] A first feed valve 211 is provided on the first feed branch 21 , a first discharge valve 221 is provided on the first discharge branch 22 , a second feed valve 231 is provided on the second feed branch 23 , and a second discharge valve 241 is provided on the second discharge branch 24 .

[0037] The paste delivery mechanism further comprises a detection unit 31, which is used to detect the volume change rate of the left chamber and / or the right chamber.

[0038] The paste conveying mechanism switches between a first state and a second state when working. When the paste conveying mechanism is in the first state, the first feed valve 211 and the second discharge valve 241 are opened, and the second feed valve 231 and the first discharge valve 221 are closed; when the paste conveying mechanism is in the second state, the first feed valve 211 and the second discharge valve 241 are closed, and the second feed valve 231 and the first discharge valve 221 are opened.

[0039] Furthermore, the paste delivery mechanism further includes a control unit, which is respectively connected to the first feed valve 211, the second feed valve 231, the first discharge valve 221 and the second discharge valve 241 by signals, and sends opening and closing instructions to the first feed valve 211, the second feed valve 231, the first discharge valve 221 and the second discharge valve 241 respectively.

[0040] The control unit is also connected to the detection unit 31 signal. The detection unit 31 detects the volume change rate of the left chamber and / or the right chamber and sends the detected result to the control unit. The control unit obtains the actual paste flow rate per unit time based on time conversion.

[0041] The control unit is also connected to the pressure detection unit 26 and the flow regulating unit 27 by signal. The pressure detection unit 26 is used to detect the paste feeding pressure before the paste enters the flow regulating unit 27, and feeds back the paste feeding pressure to the control unit. The paste feeding pressure is a preset value, which is equal to the pressure of the paste entering the left chamber or the right chamber. The purpose of setting the paste feeding pressure is to avoid the flow regulating unit 27 from idling due to insufficient paste feeding pressure. When the pressure detection unit 26 detects that the paste feeding pressure is less than the preset value, it uses shutdown, alarm, warning light and other methods to remind the operator. Based on the difference between the theoretical paste flow rate and the actual paste flow rate in production, the control unit adjusts the rotation speed of the flow regulating unit 27.

[0042] In some embodiments of the present application, a sliding rod 121 is provided on one side of the partition unit 12, one end of the sliding rod 121 is fixed on the partition unit 12, and the other end is passed through the first container 11. The sliding rod 121 slides left and right as the partition unit 12 moves left and right, and the end of the sliding rod 121 away from the partition unit 12 passes through the first container 11 to produce different distances.

[0043] The aforementioned detection unit 31 is disposed outside the first container 11 and detects the movement speed of the sliding rod 121 .

[0044] Since the left cavity and the right cavity are filled with paste, it is difficult to achieve low-cost and convenient detection of the volume change rate of the two cavities using the existing technology. At the same time, as far as the present application is concerned, the volume change rate of the left chamber and the right chamber is linearly related to the height of the two chambers. Therefore, in this embodiment, the distance that the detection slide bar 121 extends out of the first container 11 is used to obtain the volume change of the two chambers, and then the change rate of the two chambers is converted. The volume change rate of the two chambers is obtained outside the first container 11, which reduces the requirements for the detection unit 31 and also facilitates the maintenance and replacement of the detection unit 31.

[0045] In some embodiments of the present application, the first container 11 is a piston cylinder, the partition unit 12 is a piston, and the sliding rod 121 is disposed on the piston.

[0046] Preferably, two slide bars 121 may be provided, and the two slide bars 121 are symmetrically arranged about the partition unit 12. In this embodiment, two slide bars 121 are provided, which can be used for detection by the detection unit 31 and can also play a guiding role.

[0047] Preferably, the two slide bars 121 and the first container 11 are sealed by an existing sealing method to prevent the paste from leaking from the contact position between the slide bars 121 and the first container 11 .

[0048] Preferably, the slide bar 121 is further provided with a marking unit 122 on a side away from the partition unit 12, and the marking unit 122 is used for detection by the detection unit 31, so that the detection unit 31 can obviously detect the movement rate of the slide bar 121. In the present application, the marking unit 122 is a fixed block, which is provided on the slide bar 121 and moves with the slide bar 121.

[0049] Furthermore, the detection unit 31 is an electronic ruler, which is arranged outside the first container 11, above the movement path of the slide bar 121, and the length direction of the electronic ruler is consistent with the length direction of the slide bar 121. The electronic ruler can detect the extension length of the slide bar 121, and calculate the extension rate of the slide bar 121 per unit time through the control unit.

[0050] In some embodiments of the present application, the first feed valve 211, the second feed valve 231, the first discharge valve 221 and the second discharge valve 241 are all pneumatic ball valves, the flow regulating unit 27 is a metering pump, and the pressure detection unit 26 is a pressure sensor.

[0051] In the present application, the change rate of the volume of the two chambers is used to indirectly characterize the paste flow rate, avoiding the error caused by directly using a metering pump to calculate the flow rate. The durability of the first container 11 and the separation unit 12 is much greater than that of the metering pump, and it is not easy to have errors due to wear.

[0052] When the paste conveying mechanism is working, the left chamber and the right chamber are firstly exhausted, so that the left chamber and the right chamber are filled with paste and then flow out through the flow regulating unit 27. After the exhaust is completed, the paste conveying mechanism is in the first state, and the paste is input into the left chamber through the first feed branch 21. With the input of the paste, the volume of the left chamber gradually increases, and the volume of the right chamber decreases. The paste in the right chamber flows to the flow regulating unit 27 through the second discharge branch 24. During the volume change of the right chamber, the detection unit 31 detects the volume change rate of the right chamber, and adjusts the rotation speed of the flow regulating unit 27 according to the volume change rate and the theoretical flow rate so that the paste discharge amount reaches the theoretical required flow rate. When the volume of the right chamber is reduced to a preset size, the paste conveying mechanism switches to the second state, and the paste is input into the right chamber through the second feed branch 23. At this time, the volume of the right chamber increases, and the volume of the left chamber decreases. The paste in the left chamber flows to the flow regulating unit 27 through the first discharge branch 22. The detection unit 31 also detects the volume change rate of the right chamber, and adjusts the rotation speed of the flow regulating unit 27 according to the volume change rate. When the volume of the right chamber increases to a preset size, the paste conveying mechanism switches to the first state. The paste conveying mechanism switches between the first state and the second state, and the total amount of paste added can also be obtained by recording the number of state switching and the position of the partition unit 12.

[0053] Preferably, the control unit is also signal-connected to a display unit and a warning unit, the display unit is used to display the detection result of the detection unit, preferably, the detection structure is converted into actual flow and then displayed on the display unit. The warning unit is an alarm bell or a warning light.

[0054] like Figure 1 and 2 As shown, the present application also provides a conveying system, including the aforementioned paste conveying mechanism, a second container 41 and a press 43, the second container 41 is used to hold the paste, a main feed path 42 is provided at the lower end of the second container 41, and the main feed path 42 is respectively connected to the first feed branch 21 and the second feed branch 23. The press 43 is used to provide initial pressure to the paste in the second container 41, so that the paste enters the left chamber or the right chamber through the main feed path 42, the first feed branch 21 or the second feed branch 23.

[0055] In the embodiment of the present application, the press 43 is disposed above the second container 41, and the press 43 generates downward pressure on the paste in the second container 41 to prevent the paste from remaining in the second container 41. The press 43 is connected to the control unit by signal.

[0056] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A paste delivery mechanism for feedback flow, characterized in that: include: A first container (11); A partition unit (12) is slidably disposed in the first container (11) and divides the first container (11) into a left chamber and a right chamber, wherein the left chamber is connected to a first feed branch (21) and a first discharge branch (22), and the right chamber is connected to a second feed branch (23) and a second discharge branch (24), wherein the first discharge branch (22) and the second discharge branch (24) converge into a discharge main passage (25), and the discharge main passage (25) is provided with a pressure detection unit (26) and a flow regulating unit (27), wherein the pressure detection unit (26) is arranged upstream of the flow regulating unit (27); a first feed valve (211) is arranged on the first feed branch (21); a first discharge valve (221) is arranged on the first discharge branch (22); a second feed valve (231) is arranged on the second feed branch (23); and a second discharge valve (241) is arranged on the second discharge branch (24); A detection unit (31), used for detecting the volume change rate of the left chamber and / or the right chamber; The paste conveying mechanism includes a first state and a second state. When the paste conveying mechanism is in the first state, the first feed valve (211) and the second discharge valve (241) are opened, and the first discharge valve (221) and the second feed valve (231) are closed; when the paste conveying mechanism is in the second state, the first feed valve (211) and the second discharge valve (241) are closed, and the first discharge valve (221) and the second feed valve (231) are opened.

2. The paste delivery mechanism for feedback flow rate according to claim 1, characterized in that: The paste conveying mechanism further comprises a control unit, wherein the control unit is respectively connected to the first feed valve (211), the second feed valve (231), the first discharge valve (221), and the second discharge valve (241) by signals; the control unit respectively sends opening and closing instructions to the first feed valve (211), the second feed valve (231), the first discharge valve (221), and the second discharge valve (241); The control unit is also connected to the detection unit (31) by signal, and the detection unit (31) sends the detection result of the detection unit (31) to the control unit; The control unit is also signal-connected to the pressure detection unit (26) and the flow regulating unit (27); the pressure detection unit (26) detects the paste feeding pressure before the paste enters the flow regulating unit (27), and feeds back the paste feeding pressure to the control unit; the control unit adjusts the rotation speed of the flow regulating unit (27) based on the detection result of the detection unit (31).

3. The paste delivery mechanism for feedback flow rate according to claim 1, characterized in that: A sliding rod (121) is provided on one side of the partition unit (12), one end of the sliding rod (121) is fixed on the partition unit (12), and the other end is passed through the first container (11), and the sliding rod (121) moves in the left and right directions under the action of the partition unit (12); The detection unit (31) is arranged outside the first container (11) and is used to detect the movement speed of the sliding rod (121).

4. The paste delivery mechanism for feedback flow rate according to claim 3, characterized in that: The first container (11) is a piston cylinder, the partition unit (12) is a piston, and the sliding rod (121) is arranged on the piston.

5. The paste delivery mechanism for feedback flow rate according to claim 3, characterized in that: The sliding rod (121) is provided with a marking unit (122) on one side of the sliding rod (121) for detection by the detection unit (31).

6. The paste delivery mechanism for feedback flow rate according to claim 3, characterized in that: The detection unit (31) is an electronic ruler, which is arranged outside the first container (11) and is located above the movement path of the sliding rod (121).

7. The paste delivery mechanism for feedback flow rate according to claim 1, characterized in that: The first feed valve (211), the second feed valve (231), the first discharge valve (221) and the second discharge valve (241) are all pneumatic ball valves.

8. The paste delivery mechanism for feedback flow rate according to claim 1, characterized in that: The flow regulating unit (27) is a metering pump, and the pressure detecting unit (26) is a pressure sensor.

9. The paste delivery mechanism for feedback flow rate according to claim 3, characterized in that: The partition unit (12) is provided with another sliding rod (121) on the other side, and the two sliding rods (121) are symmetrically arranged with respect to the partition unit (12).

10. A conveying system, characterized in that: include: The paste delivery mechanism according to any one of claims 2 to 9; A second container (41) for containing the paste, wherein the second container (41) is provided with a main feed path (42), and the main feed path (42) is connected to the first feed branch path (21) and the second feed branch path (23); The pressing machine (43) is used to provide initial pressure to the paste in the second container (41).

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