CN115744317A - Positive pressure conveying device with pressure control system - Google Patents

Abstract

The invention discloses a positive pressure conveying device with a pressure control system, which comprises a sending tank, a receiving tank, a conveying pipe, a pressure supply device, a pressure supply pipeline system and the pressure control system, wherein the pressure supply pipeline system comprises a first pressure supply pipe and a second pressure supply pipe; the pressure control system comprises a conveying pressure detection system arranged on the conveying pipe, a sending pressure detection device arranged in the sending tank and a control device, wherein the control device is respectively connected with the conveying pressure detection device, the sending pressure detection device, the first valve and the second valve. The pressure in the conveying pipeline and the sending tank can be detected in real time, the pressure in the whole conveying device can be automatically adjusted according to the real-time pressure, the pressure inside the conveying system can be effectively controlled, and the pipeline blockage caused by the damage of powder particles or the undersize pressure is avoided.

Description

A positive pressure conveying device with a pressure control system

technical field

The invention relates to the technical field of chemical machinery, in particular to a positive pressure conveying device with a pressure control system.

Background technique

Powder materials are usually conveyed by a positive pressure conveying device. Positive pressure conveying uses the front end of the conveying system, that is, the fan at the starting point of the system to feed compressed air into the conveying pipeline, and uses the pressure difference between the beginning and the end of the pipeline to make the air flow in the pipeline. In the positive pressure conveying system, the material is fed into the conveying system by the feeding device, and the material is separated from the air at the end of the conveying. However, when using a positive pressure conveying device to transport powder materials, the pressure in the pipeline is usually difficult to control. The flow rate of the material in the pipeline is generally faster if the pressure is too high. During the transportation of some materials with low surface strength, due to the particles The friction between the particles and the particles or between the particles and the wall of the conveying pipe will cause the surface of the material particles to wear and produce more fine powder; if the pressure is too small, the pipe will be easily blocked.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a positive pressure conveying device with a pressure control system, which specifically includes the following contents:

A positive pressure conveying device with a pressure control system, comprising a sending tank, a receiving tank, a conveying pipe, a pressure supply device, and a pressure supply pipeline system, the conveying pipe includes a first end and a second end, the first end of the conveying pipe is connected to the The sending tank is connected, the second end of the delivery pipe is connected to the receiving tank, and a pressure control system is also included. The pressure supply pipeline system includes a first pressure supply pipe and a second pressure supply pipe, and the first pressure supply pipe is respectively connected to the pressure supply device. It is connected with the sending tank, the first pressure supply pipe is provided with a first valve, the second pressure supply pipe is respectively connected with the pressure supply device and the first end of the delivery pipe, and the second pressure supply pipe is provided with a second valve; The pressure control system includes a delivery pressure detection system arranged in the delivery pipe, a delivery pressure detection device arranged in the sending tank, and a control device, and the control device is respectively connected with the delivery pressure detection device, the delivery pressure detection device, the first valve and the first valve. Two valve connections.

Specifically, the pressure supply pipeline system also includes an air supply pipeline, and one or more air supply ports are provided on the delivery pipe, the air supply ports are connected to the pressure supply device through the air supply pipeline, and the air supply pipeline is provided with an air supply valve , the gas supply valve is connected with the control device.

Specifically, the control device includes a signal receiving module, a control module, and a computing module connected to the signal receiving module and the control module respectively, and the signal receiving module is respectively connected to a delivery pressure detection system and a sending pressure detection device, and the control The modules are respectively connected with the first valve, the second valve and the air supply valve.

Specifically, the delivery pressure detection system includes one or more pressure transmitters, and the delivery pressure detection device is a pressure transmitter.

Specifically, the delivery pressure detection system includes a plurality of pressure transmitters, and the plurality of pressure transmitters are arranged at intervals on the delivery pipe.

Specifically, an air inlet is provided at the middle and lower part of the sending tank, and the air inlet is connected to the pressure supply device through the first pressure supply pipe.

Specifically, an air outlet is provided on the upper part of the receiving tank, a filtering device is provided inside the air outlet, an air outlet pipe is connected to the outside of the air outlet, and an air outlet valve is arranged on the air outlet pipe.

Specifically, a discharge port is provided at the bottom of the receiving tank, and a discharge valve is provided at the discharge port.

Specifically, the upper part of the sending tank is provided with an exhaust port, the exhaust port is externally connected to an exhaust pipe, and an exhaust valve is provided on the exhaust pipe.

Specifically, the upper end of the sending tank is provided with a feed port, a feed valve is provided at the feed port, and a feed fan is provided at the upper end of the feed port.

Beneficial effects of the present invention:

(1) The device is equipped with a pressure control system, which can detect the pressure in the conveying pipeline and the sending tank in real time, and automatically adjust the pressure in the entire conveying device according to the real-time pressure, which can effectively control the pressure inside the conveying system and avoid the pressure caused by the pressure. Damage to the powder particles caused by too large or blockage of the pipeline caused by too small pressure;

(2) Multiple pressure transmitters and air supply points are set at intervals on the delivery pipe, which can detect the air pressure in different parts of the pipeline and perform targeted air supply, which can prevent local air pressure caused by pipeline leakage from being too low. partial blockage;

(3) The middle and lower part of the sending tank is provided with an air inlet, which is connected with the pressure supply device. On the one hand, it can keep the pressure in the sending tank not lower than the conveying pipeline, which is convenient for discharging; on the other hand, it can also discharge the powder in the sending tank. Blow up to make the material fluidized, easier to transport, and prevent the outlet from being blocked.

Description of drawings

Fig. 1 is the structural representation of the disclosed device of this valve;

Fig. 2 is a schematic diagram of the connection relationship of the control device of the device disclosed in the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The examples shown below do not in any way limit the content of the invention described in the claims. In addition, all the contents of the configurations shown in the following embodiments are not limited to be essential to the solutions of the invention described in the claims.

With reference to accompanying drawing 1, a kind of positive pressure conveying device with pressure control system comprises sending tank 1, receiving tank 2, delivery pipe 5, pressure supply device 7, and pressure supply piping system, delivery pipe 5 comprises first end and the second Two ends, the first end of the delivery pipe 5 is connected with the sending tank 1, the second end of the delivery pipe 5 is connected with the receiving tank 2, and also includes a pressure control system, and the pressure supply pipeline system includes a first pressure supply pipe and a second pressure supply pipe. Pressure supply pipe, the first pressure supply pipe is connected with the pressure supply device 7 and the sending tank 1 respectively, the first pressure supply pipe is provided with the first valve 3, and the second pressure supply pipe is connected with the pressure supply device 7 and the delivery pipe 5 respectively. The first end is connected, and the second pressure supply pipe is provided with a second valve 4; the pressure control system includes a delivery pressure detection system arranged in the delivery pipe 5, a delivery pressure detection device arranged in the sending tank 1, and a control device , the control device is respectively connected with the delivery pressure detection device, the delivery pressure detection device, the first valve 3 and the second valve 4. The device is equipped with a pressure control system, which can detect the pressure in the 5 conveying pipes and the sending tank 1 in real time, and automatically adjust the pressure in the entire conveying device according to the real-time pressure, which can effectively control the pressure inside the conveying system and avoid the pressure caused by the pressure. Damage to the powder particles caused by too large or blockage of the pipeline caused by too small pressure.

In one embodiment of the present invention, the pressure supply pipeline system also includes an air supply pipeline 6, and one or more air supply ports are arranged on the delivery pipe 5, and the air supply ports pass through the air supply pipeline 6 and the pressure supply device 7 Connection, the gas supply pipeline 6 is provided with a gas supply valve, and the gas supply valve is connected with the control device.

With reference to accompanying drawing 2, in one embodiment of the present invention, described control device comprises signal receiving module, control module, and the computing module that is connected with signal receiving module and control module respectively, and described signal receiving module is connected with delivery pressure detection respectively The system and the sending pressure detection device are connected, and the control module is respectively connected with the first valve 3, the second valve 4 and the air supply valve.

In one embodiment of the present invention, the delivery pressure detection system includes one or more pressure transmitters 7 , and the delivery pressure detection device is the pressure transmitter 7 . A plurality of pressure transmitters 7 and air supply points are arranged at intervals on the delivery pipe 5, which can detect the air pressure in different parts of the pipeline, and perform air supply in a targeted manner, which can prevent local air pressure from being too low due to pipeline air leakage. clogged.

In one embodiment of the present invention, the delivery pressure detection system includes a plurality of pressure transmitters 7 , and the plurality of pressure transmitters 7 are arranged on the delivery pipe 5 at intervals.

In one embodiment of the present invention, the middle and lower part of the sending tank 1 is provided with an air inlet, and the air inlet is connected to the pressure supply device 7 through a first pressure supply pipe. The middle and lower part of the sending tank 1 is provided with an air inlet, and communicated with the pressure supply device 7. On the one hand, the pressure in the sending tank 1 can be kept not lower than the delivery pipe 5, which is convenient for discharging; on the other hand, the sending tank 1 can also be The powder in the machine is blown up to fluidize the material, making it easier to transport and prevent the outlet from being blocked.

In one embodiment of the present invention, the upper part of the receiving tank 2 is provided with an air outlet, the inside of the air outlet is provided with a filter device 8, the outside of the air outlet is connected to an air outlet pipe, and an air outlet valve 9 is arranged on the air outlet pipe. 9 is preferably a pulse valve.

In one embodiment of the present invention, a discharge port is provided at the bottom of the receiving tank 2, and a discharge valve 10 is provided at the discharge port.

In one embodiment of the present invention, the upper part of the sending tank 1 is provided with an exhaust port, the exhaust port is externally connected to an exhaust pipe, and an exhaust valve 11 is provided on the exhaust pipe.

In one embodiment of the present invention, the upper end of the sending tank 1 is provided with a feeding port, a feeding valve 12 is provided at the feeding port, and a feeding fan 13 is provided at the upper end of the feeding port.

The usage method of the device disclosed in the present invention:

(1) Feeding: Firstly, the materials to be transported are added through the feeding port of the sending tank 1, and the feeding fan 13 is turned on for quantitative feeding. During the feeding, the emptying valve of the sending tank 1 is opened. After the feed is completed, close the feed fan 13 and the feed valve 12, the feed valve 12 is preferably a pneumatic butterfly valve, and then close the exhaust valve 11.

(2) Delivery: control the second valve 4, adjust the pressure in the delivery pipe 5 at 0.2-0.3MPa, open the discharge valve 10 of the sending tank 1, open the first valve 3, and start to convey the material, which enters through the delivery pipe 5 The receiving tank 2, the gas is discharged through the outlet pipe of the receiving tank 2, and the powder material enters the receiving tank 2. When the pressure of the sending tank 1 is lower than the set value, it can be confirmed that the material has been sent, and the sending is continued for 10-30 seconds, and the 5 delivery pipes are cleaned. Close the first valve 3 and the second valve 4.

(3) Blanking: after conveying is finished, open receiving tank 2 discharge valve 10, start unloading, and the filter core of filtering device 8 is sprayed from outside to inside from the pulse air valve on the receiving tank 2 outlet pipe, cleaning prevents The filter tube is clogged. After the blanking is completed, the next cycle of feeding, conveying and unloading starts.

(4) Pressure control: the pressure transmitter 7 on the sending tank 1 and the delivery pipe 5 monitors the pressure in the device in real time, and sends the pressure information to the signal receiving module of the control device, and the signal receiving module transmits the signal to the calculation module, When the detected pressure is less than or greater than the set pressure, the calculation module transmits the calculation result to the control module, and the control module controls the corresponding valve to close or open to adjust the air pressure at the corresponding position back to the set range.

Unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection. Connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal connection between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A positive pressure conveying device with a pressure control system comprises a sending tank, a receiving tank, a conveying pipe, a pressure supply device and a pressure supply pipeline system, wherein the conveying pipe comprises a first end and a second end, the first end of the conveying pipe is connected with the sending tank, and the second end of the conveying pipe is connected with the receiving tank; the pressure control system comprises a conveying pressure detection system arranged on the conveying pipe, a sending pressure detection device arranged in the sending tank and a control device, wherein the control device is respectively connected with the conveying pressure detection device, the sending pressure detection device, the first valve and the second valve.

2. The positive pressure conveying device with the pressure control system according to claim 1, wherein the pressure supply pipeline system further comprises an air supply pipeline, the conveying pipeline is further provided with one or more air supply ports, the air supply ports are connected with the pressure supply device through the air supply pipeline, the air supply pipeline is provided with an air supply valve, and the air supply valve is connected with the control device.

3. The positive pressure conveying device with the pressure control system according to claim 2, wherein the control device comprises a signal receiving module, a control module and a calculating module respectively connected with the signal receiving module and the control module, the signal receiving module is respectively connected with the conveying pressure detection system and the sending pressure detection device, and the control module is respectively connected with the first valve, the second valve and the air compensating valve.

4. The positive pressure delivery apparatus with pressure control system according to any of claims 1-3, wherein the delivery pressure detection system comprises one or more pressure transducers, and the sending pressure detection apparatus is a pressure transducer.

5. The positive pressure conveying device with the pressure control system according to claim 4, wherein the conveying pressure detection system comprises a plurality of pressure transmitters, and the plurality of pressure transmitters are arranged on the conveying pipe at intervals.

6. The positive pressure delivery device with the pressure control system according to any one of claims 1 to 3, wherein an air inlet is provided at a middle-lower portion of the sending tank, and the air inlet is connected with the pressure supply device through a first pressure supply pipe.

7. The positive pressure conveying device with the pressure control system according to any one of claims 1 to 3, wherein an air outlet is arranged at the upper part of the receiving tank, a filtering device is arranged at the inner side of the air outlet, an air outlet pipe is connected to the outer side of the air outlet, and an air outlet valve is arranged on the air outlet pipe.

8. The positive pressure conveying device with the pressure control system according to claim 7, wherein a discharge port is arranged at the bottom end of the receiving tank, and a discharge valve is arranged at the discharge port.

9. The positive pressure delivery device with the pressure control system according to any one of claims 1 to 3, wherein the upper part of the sending tank is provided with an exhaust port, the exhaust port is externally connected with an exhaust pipe, and the exhaust pipe is provided with an exhaust valve.

10. The positive pressure conveying device with the pressure control system according to claim 9, wherein a feed port is arranged at the upper end of the sending tank, a feed valve is arranged at the feed port, and a feed fan is arranged at the upper end of the feed port.

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