High-stability centrifugal liquid pressure control pumping assembly

Abstract

The utility model relates to the technical field of heart type liquid pump pressure control conveying, in particular to a high-stability centrifugal liquid pressure control pumping assembly which comprises a communicating pipe, a DCS (distributed control system) and a centrifugal nitrogen pump body, a hole is formed in the upper end face of the communicating pipe, the communicating pipe is communicated with an installation pipe, and one end of the communicating pipe is communicated with a return valve body. The pressure transmitter further comprises a pressure transmitter body. The pressure transmitter body is fixedly mounted at the top of the mounting pipe; wherein the pressure transmitter body is electrically connected with the DCS control system; wherein the DCS control system is electrically connected with the centrifugal nitrogen pump body; wherein the DCS control system is electrically connected with the return valve body. The utility model solves the problem that the pressure at the outlet of the centrifugal nitrogen pump fluctuates correspondingly along with the change of the pressure of a pipe network, so that the pressure at the outlet of the centrifugal nitrogen pump is unstable.

Description

Technical Field

[0001] The utility model relates to the technical field of controlled-pressure conveying of core liquid pumps, and particularly relates to a high-stability centrifugal liquid controlled-pressure pumping assembly. Background Technique

[0002] A centrifugal pump relies on a rotating impeller to do work on the liquid and transfer the mechanical energy of the prime mover to the liquid. When the pump is filled with liquid and working, due to the high-speed rotation of the impeller, the liquid generates a centrifugal force under the action of the impeller, driving the liquid to increase both the pressure energy and the velocity energy during the process of flowing from the impeller inlet to the outlet, and then further converting the velocity energy into pressure energy in the diffuser chamber and outputting it.

[0003] During the operation of a centrifugal nitrogen pump, after the low-temperature liquid increases, it is vaporized by a vaporizer and transported to the nitrogen gas pipeline network. As the pressure of the pipeline network changes, the outlet pressure of the centrifugal nitrogen pump will also fluctuate accordingly, resulting in unstable outlet pressure of the centrifugal nitrogen pump.

[0004] Therefore, it is necessary to provide a high-stability centrifugal liquid controlled-pressure pumping assembly to achieve the purpose of maintaining the stability of the nitrogen gas pipeline network pressure. Content of the Utility Model

[0005] The purpose of the utility model is to provide a high-stability centrifugal liquid controlled-pressure pumping assembly, which has the advantages of controlling the outlet pressure of the centrifugal nitrogen pump by controlling the opening degree of the reflux valve of the centrifugal nitrogen pump and the rotation speed of the centrifugal nitrogen pump, so as to achieve the stability of the nitrogen gas pipeline network pressure, and solves the problem that as the pressure of the pipeline network changes, the outlet pressure of the centrifugal nitrogen pump will also fluctuate accordingly, resulting in unstable outlet pressure of the centrifugal nitrogen pump.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a high-stability centrifugal liquid controlled-pressure pumping assembly, including a connecting pipe, a DCS control system and a centrifugal nitrogen pump body. An installation pipe is connected and installed by opening a hole on the upper end surface of the connecting pipe. One end of the connecting pipe is connected and installed with a reflux valve body, and further includes a pressure transmitter body;

[0007] The pressure transmitter body is fixedly installed on the top of the installation pipe;

[0008] Among them, the pressure transmitter body is electrically connected to the DCS control system;

[0009] Among them, the DCS control system is electrically connected to the centrifugal nitrogen pump body;

[0010] Among them, the DCS control system is electrically connected to the reflux valve body.

[0011] When using a high-stability centrifugal liquid pressure-controlled pumping component in this technical solution, connect the connecting pipe to the reflux valve body and connect the connecting pipe to the centrifugal nitrogen pump body. Connect the reflux valve body to the conveying pipeline, and through the professional cooperation of the instrument and the process, output the electrical signal of the outlet pressure of the centrifugal nitrogen pump body to the DCS control system through the pressure transmitter body. The DCS control system outputs an analog quantity to the reflux valve body according to the pressure feedback. When the outlet pressure of the centrifugal nitrogen pump is low, the reflux valve body is automatically closed. When the reflux valve body is already closed and the outlet pressure of the centrifugal nitrogen pump body is still low, the motor frequency of the centrifugal nitrogen pump body gradually increases, thereby increasing the rotation speed of the centrifugal nitrogen pump body, and thus increasing the outlet pressure of the centrifugal nitrogen pump body. When the outlet pressure of the centrifugal nitrogen pump body is high, the rotation speed of the centrifugal nitrogen pump body is preferentially reduced. After the rotation speed is reduced, if the outlet pressure of the centrifugal nitrogen pump body is still on the high side, the reflux valve body is automatically and gradually opened. At the same time, in order to achieve precise control of the outlet pressure of the centrifugal nitrogen pump body, the pressure transmitter body is installed at the outlet of the centrifugal nitrogen pump body. Through the pressure transmitter body, the pressure at the outlet of the centrifugal nitrogen pump body can be monitored in real time, and the data can be accurately transmitted to the DCS control system. Through the processing ability of the DCS control system, the pressure data received in real time can be quickly analyzed, and corresponding control instructions can be generated, so as to regulate the pipeline network pressure.

[0012] Preferably, one end of the connecting pipe facing away from the reflux valve body is connected and installed to the vaporizer on the centrifugal nitrogen pump body.

[0013] By connecting one end of the connecting pipe facing away from the reflux valve body to the vaporizer on the centrifugal nitrogen pump body, the centrifugal nitrogen pump body can convey gas to the reflux valve body through the connecting pipe.

[0014] Preferably, the installation pipe is welded and installed at the opening on the upper end face of the connecting pipe, and the diameter of the installation pipe is smaller than that of the connecting pipe.

[0015] By welding and installing the installation pipe at the opening on the upper end face of the connecting pipe and making the diameter of the installation pipe smaller than that of the installation pipe, the pressure in the connecting pipe can be monitored by the pressure transmitter body installed at the top of the installation pipe.

[0016] Preferably, the reflux valve body, the centrifugal nitrogen pump body and the pressure transmitter body are configured and output signals to the DCS control system.

[0017] By configuring the reflux valve body, the centrifugal nitrogen pump body and the pressure transmitter body and outputting signals to the DCS control system, the stability of the outlet pressure of the centrifugal nitrogen pump body can be controlled through the DCS control system.

[0018] Preferably, the pressure transmitter body is designed with a diffused silicon pressure transmitter, and the pressure transmitter body is fixedly installed at the top of the installation pipe through a flange.

[0019] By designing the pressure transmitter body with a diffused silicon pressure transmitter and fixing the pressure transmitter body on the top of the installation pipe through a flange, the liquid or gas pressure sensed is converted into a standard electrical signal and output to the DCS control system externally.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] The present utility model is provided with a pressure transmitter body and fixes the pressure transmitter body on the top of the installation pipe. At the same time, the pressure transmitter body is electrically connected to the DCS control system. At the same time, the DCS control system is electrically connected to the centrifugal nitrogen pump body. At the same time, the DCS control system is electrically connected to the reflux valve body. During specific operations, through the cooperation of the instrument specialty and the process, the outlet pressure of the centrifugal nitrogen pump body outputs an electrical signal to the DCS control system through the pressure transmitter body. The DCS control system outputs an analog quantity to the reflux valve body according to the pressure feedback. When the outlet pressure of the centrifugal nitrogen pump is low, the reflux valve body is automatically closed. When the reflux valve body has been closed and the outlet pressure of the centrifugal nitrogen pump body is still low, the motor frequency of the centrifugal nitrogen pump body gradually increases, thereby increasing the rotational speed of the centrifugal nitrogen pump body, thereby increasing the outlet pressure of the centrifugal nitrogen pump body. When the outlet pressure of the centrifugal nitrogen pump body is high, the rotational speed of the centrifugal nitrogen pump body is preferentially reduced. After the rotational speed is reduced, if the outlet pressure of the centrifugal nitrogen pump body is still on the high side, the reflux valve body is automatically and gradually opened. At the same time, in order to achieve precise control of the outlet pressure of the centrifugal nitrogen pump body, the pressure transmitter body is installed at the outlet of the centrifugal nitrogen pump body. Through the pressure transmitter body, the pressure at the outlet of the centrifugal nitrogen pump body can be monitored in real time and the data can be accurately transmitted to the DCS control system. Through the processing ability of the DCS control system, rapid analysis of the received pressure data is realized in real time, and corresponding control instructions are generated, thereby regulating the pipeline network pressure, achieving the effect of controlling the outlet pressure of the centrifugal nitrogen pump by controlling the opening of the reflux valve of the centrifugal nitrogen pump and the rotational speed of the centrifugal nitrogen pump, and achieving the effect of maintaining the stability of the nitrogen pipeline network pressure. Description of the Drawings

[0022] Figure 1 is the front view structural schematic diagram of the present utility model;

[0023] Figure 2 is the control structural schematic diagram of the present utility model.

[0024] In the figure: 1, connecting pipe; 2, installation pipe; 3, pressure transmitter body; 4, reflux valve body; 5, DCS control system; 6, centrifugal nitrogen pump body. Detailed Embodiment

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Embodiment

[0027] As Figure 1 and Figure 2 shown, an embodiment provided by the present invention is: a high-stability centrifugal liquid pressure-controlled pumping assembly, including a connecting pipe 1, a DCS control system 5, and a centrifugal nitrogen pump body 6. An installation pipe 2 is installed by opening a hole on the upper end surface of the connecting pipe 1. A reflux valve body 4 is connected and installed at one end of the connecting pipe 1. Further included is a pressure transmitter body 3.

[0028] Specifically,

[0029] The pressure transmitter body 3 is fixedly installed on the top of the installation pipe 2.

[0030] Among them, the pressure transmitter body 3 is electrically connected to the DCS control system 5.

[0031] Among them, the DCS control system 5 is electrically connected to the centrifugal nitrogen pump body 6.

[0032] Among them, the DCS control system 5 is electrically connected to the reflux valve body 4.

[0033] By setting a pressure transmitter body 3 and fixing the pressure transmitter body 3 on the top of the mounting pipe 2, at the same time, the pressure transmitter body 3 is electrically connected to the DCS control system 5, at the same time, the DCS control system 5 is electrically connected to the centrifugal nitrogen pump body 6, at the same time, the DCS control system 5 is electrically connected to the reflux valve body 4. When performing specific operations, the outlet pressure of the centrifugal nitrogen pump body 6 is output to the DCS control system 5 through the pressure transmitter body 3 through the instrument professional matching process. The DCS control system 5 outputs an analog quantity to the reflux valve body 4 according to the pressure feedback. When the outlet pressure of the centrifugal nitrogen pump is low, the reflux valve body 4 is automatically closed. When the reflux valve body 4 is closed and the outlet pressure of the centrifugal nitrogen pump body 6 is still low, the motor frequency of the centrifugal nitrogen pump body 6 is gradually increased, thereby increasing the rotation speed of the centrifugal nitrogen pump body 6, thereby increasing the outlet pressure of the centrifugal nitrogen pump body 6. When the outlet pressure of the centrifugal nitrogen pump body 6 is high, the rotation speed of the centrifugal nitrogen pump body 6 is preferentially reduced. After the rotation speed is reduced, if the outlet pressure of the centrifugal nitrogen pump body 6 is still high, the reflux valve body 4 is automatically opened gradually. At the same time, in order to achieve accurate control of the outlet pressure of the centrifugal nitrogen pump body 6, the pressure transmitter body 3 is installed at the outlet of the centrifugal nitrogen pump body 6. The pressure at the outlet of the centrifugal nitrogen pump body 6 can be monitored in real time through the pressure transmitter body 3, and the data can be accurately transmitted to the DCS control system 5. Through the processing capability of the DCS control system 5, the received pressure data can be quickly analyzed in real time, and corresponding control instructions can be generated, so as to regulate the pipeline network pressure, so as to control the outlet pressure of the centrifugal nitrogen pump by controlling the reflux valve opening of the centrifugal nitrogen pump and the rotation speed of the centrifugal nitrogen pump, so as to maintain the stable pressure of the nitrogen pipeline network.

[0034] Furthermore, one end of the connecting pipe 1 away from the reflux valve body 4 is connected and installed to the vaporizer on the centrifugal nitrogen pump body 6 .

[0035] The end of the connecting pipe 1 facing away from the reflux valve body 4 is connected to the vaporizer on the centrifugal nitrogen pump body 6 and installed, so that the centrifugal nitrogen pump body 6 can transport gas to the reflux valve body 4 through the connecting pipe 1.

[0036] Furthermore, the installation pipe 2 is welded and installed at the opening of the upper end surface of the connecting pipe 1 , and the diameter of the installation pipe 2 is smaller than the diameter of the connecting pipe 1 .

[0037] By welding the mounting tube 2 to the opening on the upper end surface of the connecting tube 1 and making the diameter of the mounting tube 2 smaller than the diameter of the connecting tube 1 , the pressure in the connecting tube 1 can be monitored by the pressure transmitter body 3 installed on the top of the mounting tube 2 .

[0038] Furthermore, the reflux valve body 4 is configured with the centrifugal nitrogen pump body 6 and the pressure transmitter body 3 and outputs signals to the DCS control system 5 .

[0039] By configuring the reflux valve body 4, the centrifugal nitrogen pump body 6, and the pressure transmitter body 3 and outputting signals to the DCS control system 5, the stability of the outlet pressure of the centrifugal nitrogen pump body 6 is controlled through the DCS control system 5.

[0040] Furthermore, the pressure transmitter body 3 is designed with a diffused silicon pressure transmitter and is fixedly installed at the top of the installation pipe 2 through a flange.

[0041] By designing the pressure transmitter body 3 with a diffused silicon pressure transmitter and fixedly installing the pressure transmitter body 3 at the top of the installation pipe 2 through a flange, the felt liquid or gas pressure is converted into a standard electrical signal and output externally to the DCS control system 5. When the present utility model is in use, the connecting pipe 1 is connected and installed with the reflux valve body 4 and the connecting pipe 1 is connected and installed with the centrifugal nitrogen pump body 6. The reflux valve body 4 is connected and installed with the conveying pipeline, and through the cooperation of the instrument specialty and the process, the outlet pressure of the centrifugal nitrogen pump body 6 outputs an electrical signal to the DCS control system 5 through the pressure transmitter body 3. The DCS control system 5 outputs an analog quantity to the reflux valve body 4 according to the pressure feedback. When the outlet pressure of the centrifugal nitrogen pump is low, the reflux valve body 4 is automatically closed. When the reflux valve body 4 has been closed and the outlet pressure of the centrifugal nitrogen pump body 6 is still low, the motor frequency of the centrifugal nitrogen pump body 6 gradually increases, thereby increasing the rotational speed of the centrifugal nitrogen pump body 6 and thus increasing the outlet pressure of the centrifugal nitrogen pump body 6. When the outlet pressure of the centrifugal nitrogen pump body 6 is high, the rotational speed of the centrifugal nitrogen pump body 6 is preferentially reduced. When the rotational speed is reduced, if the outlet pressure of the centrifugal nitrogen pump body 6 is still on the high side, the reflux valve body 4 is automatically and gradually opened. At the same time, in order to achieve precise control of the outlet pressure of the centrifugal nitrogen pump body 6, the pressure transmitter body 3 is installed at the outlet of the centrifugal nitrogen pump body 6. Through the pressure transmitter body 3, the pressure at the outlet of the centrifugal nitrogen pump body 6 can be monitored in real time and the data can be accurately transmitted to the DCS control system 5. Through the processing ability of the DCS control system 5, real-time rapid analysis of the received pressure data is realized and corresponding control instructions are generated, thereby regulating the pipeline network pressure.

[0042] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A high-stability centrifugal liquid pressure-controlled pumping assembly, comprising a connecting pipe (1), a DCS control system (5) and a centrifugal nitrogen pump body (6). An installation pipe (2) is installed through an opening on the upper end surface of the connecting pipe (1) in a communicating manner. One end of the connecting pipe (1) is connected and installed with a reflux valve body (4), and it is characterized in that, Also includes: The pressure transmitter body (3) is fixedly mounted on the top of the mounting pipe (2); Wherein, the pressure transmitter body (3) is electrically connected to the DCS control system (5); Wherein, the DCS control system (5) is electrically connected to the centrifugal nitrogen pump body (6); Wherein, the DCS control system (5) is electrically connected to the reflux valve body (4).

2. The high-stability centrifugal liquid pressure-controlled pumping assembly according to claim 1, characterized in that, One end of the connecting pipe (1) facing away from the reflux valve body (4) is connected to and installed in communication with the vaporizer on the centrifugal nitrogen pump body (6).

3. The high-stability centrifugal liquid pressure-controlled pumping assembly according to claim 1, characterized in that, The installation pipe (2) is welded and installed at the opening of the upper end surface of the connecting pipe (1); the diameter of the installation pipe (2) is smaller than the diameter of the connecting pipe (1).

4. A high-stability centrifugal liquid pressure-controlled pumping assembly according to claim 1, characterized in that, The reflux valve body (4) is configured with the centrifugal nitrogen pump body (6) and the pressure transmitter body (3) to output signals to a DCS control system (5).

5. A high-stability centrifugal liquid pressure-controlled pumping assembly according to claim 1, characterized in that, The pressure transmitter body (3) adopts a diffused silicon pressure transmitter design, and the pressure transmitter body (3) is fixedly mounted on the top of the mounting pipe (2) via a flange.

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