A delivery pump outlet pressure stabilization compensation device

Abstract

The present invention discloses a device for stabilizing and compensating the outlet pressure of a delivery pump, which relates to the technical field of pressure compensation devices. The device comprises a piston cylinder, a piston, and multiple accumulators. The piston is slidingly and sealingly connected to the piston cylinder and divides the inner cavity of the piston cylinder into a first chamber and a second chamber. The first chamber is connected to the outlet of the delivery pump, and the second chamber is connected to each accumulator via a pipeline. A control valve is provided on the pipeline connecting each accumulator to the second chamber. Hydraulic oil is filled in each accumulator and the second chamber. Each accumulator is provided with an airbag filled with gas at different pressures. The device for stabilizing and compensating the outlet pressure of the delivery pump provided by the present invention can perform segmented compensation for different pressure sections of the process medium, stabilize the working pressure of each pressure section, effectively suppress pressure fluctuations at the outlet of the delivery pump and severe vibration of the delivery pipeline, eliminate safety hazards, and ensure safe chemical production.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure compensation devices, in particular to a delivery pump outlet pressure stabilization compensation device. Background Art

[0002] The water-coal slurry gasification and high-temperature melting co-treatment waste treatment technology treats organic waste liquids. It uses multi-plunger pumping technology to inject organic waste liquids into a pressurized gasifier. However, during the transportation process, the pipeline vibrates violently, causing pipes to crack and instrument detection components to be damaged on many occasions, resulting in organic solvent leakage, seriously endangering chemical production safety and posing a major safety hazard. In the existing technology, an energy accumulator is installed at the pump outlet. However, because the medium is waste organic solvent, it is easy to corrode the airbag and cannot operate for a long period of time. Moreover, the gasification process is put into operation in a (pressure) staged manner. The installation of an energy accumulator at the pump outlet cannot meet the pressure stabilization process requirements of multiple pressure sections. During the operation process, the pipeline vibrates more, which is more likely to cause pipes to crack and instrument detection components to be damaged, and there is still a major safety hazard. Summary of the Invention

[0003] The purpose of the present invention is to provide a conveying pump outlet pressure stabilization and compensation device to solve the problems existing in the above-mentioned prior art. It can perform segmented compensation for different pressure sections of the process medium, stabilize the working pressure of each pressure section, effectively suppress the conveying pump outlet pressure fluctuation and the violent vibration of the conveying pipeline, eliminate safety hazards, and ensure chemical production safety.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a delivery pump outlet pressure stabilization and compensation device, comprising a piston cylinder, a piston and a plurality of accumulators, wherein the piston is slidingly and sealingly connected to the piston cylinder and divides the inner cavity of the piston cylinder into a first chamber and a second chamber, wherein the first chamber is connected to the outlet of the delivery pump, and the second chamber is respectively connected to each of the accumulators via a pipeline, and a control valve is provided on the pipeline connecting each of the accumulators and the second chamber, and hydraulic oil is filled in each of the accumulators and the second chamber, and each of the accumulators is respectively provided with an air bag filled with gas at different pressures.

[0006] Preferably, a control unit is further included, and a pressure detector for detecting the oil pressure in the second chamber is provided on the piston cylinder, and the pressure detector and each of the control valves are electrically connected to the control unit.

[0007] Preferably, a position indicating rod is connected to the piston, and the position indicating rod passes through the second chamber and extends out of the piston cylinder body. The position indicating rod is slidingly and sealingly connected to the piston cylinder body and can move with the movement of the piston.

[0008] Preferably, an oil injection pump is provided on the piston cylinder body, and an outlet of the oil injection pump is connected to the second chamber.

[0009] Preferably, the piston cylinder is made of 316L stainless steel, the piston is made of 2205 duplex stainless steel, and the sealing ring between the piston and the piston cylinder is made of perfluoroether or polytetrafluoroethylene.

[0010] Preferably, a one-way valve is provided on the pipeline connecting the outlet of the oil injection pump and the second chamber.

[0011] Preferably, the gas in the airbag is nitrogen.

[0012] Preferably, the oil injection pump is a manual oil injection pump.

[0013] Compared with the prior art, the present invention has achieved the following technical effects:

[0014] The present invention provides a device for stabilizing and compensating the outlet pressure of a delivery pump. The device comprises a plurality of accumulators, wherein the outlets of the accumulators are connected to the second chamber of a piston cylinder, the first chamber of the piston cylinder is connected to the outlet of the delivery pump, and hydraulic oil is added to the accumulator and the second chamber. When the outlet pressure of the delivery pump changes, the accumulator compensates for the outlet pressure of the delivery pump under the action of the piston, thereby stabilizing the outlet pressure. The accumulator corresponding to the outlet pressure section of the delivery pump is connected to the second chamber by switching a control valve, thereby performing segmented compensation for multiple pressure sections in the delivery process of the delivery pump through the accumulator, stabilizing the working pressure of each pressure section, effectively suppressing the outlet pressure fluctuation of the delivery pump and the violent vibration of the delivery pipeline, eliminating safety hazards, and ensuring safe chemical production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic structural diagram of the delivery pump outlet pressure stabilization and compensation device provided by the present invention;

[0017] In the figure: 100-delivery pump outlet pressure stabilization and compensation device, 1-piston cylinder, 2-piston, 3-energy accumulator, 4-first chamber, 5-second chamber, 6-delivery pump, 7-control valve, 8-air bag, 9-pressure detector, 10-position indicator rod, 11-oil injection pump, 12-check valve, 13-control unit. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] The purpose of the present invention is to provide a conveying pump outlet pressure stabilization and compensation device to solve the problems existing in the prior art. It can perform segmented compensation for different pressure sections of the process medium, stabilize the working pressure of each pressure section, effectively suppress the conveying pump outlet pressure fluctuation and the violent vibration of the conveying pipeline, eliminate safety hazards, and ensure safe chemical production.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 As shown, this embodiment provides a delivery pump outlet pressure stabilization and compensation device 100, including a piston cylinder 1, a piston 2 and a plurality of accumulators 3. The piston 2 is slidingly and sealingly connected to the piston cylinder 1 and divides the inner cavity of the piston cylinder 1 into a first chamber 4 and a second chamber 5. The first chamber 4 is connected to the outlet of the delivery pump 6, and the second chamber 5 is connected to each accumulator 3 through a pipeline. A control valve 7 is provided on the pipeline connecting each accumulator 3 and the second chamber 5. Hydraulic oil is filled in each accumulator 3 and the second chamber 5. An air bag 8 filled with gas of different pressure is provided in each accumulator 3.

[0022] The gas pressure within each airbag 8 corresponds to the multiple pressure sections during the delivery process of the delivery pump 6, compensating for pressure variations in each section and stabilizing the operating pressure. By switching the control valve 7, the accumulator 3 corresponding to the outlet pressure section of the delivery pump 6 is connected to the second chamber 5. This allows the accumulator 3 to compensate for the multiple pressure sections during the delivery process of the delivery pump 6 in sections, stabilizing the operating pressure of each pressure section and effectively suppressing pressure fluctuations at the outlet of the delivery pump 6 and severe vibrations in the delivery pipeline, eliminating safety hazards and ensuring safe chemical production. Due to the provision of the piston cylinder 1 and piston 2, pressure compensation is transmitted via hydraulic oil, preventing corrosion of the airbag 8 by the process medium (organic waste liquid) delivered by the delivery pump 6 and extending its service life.

[0023] This embodiment also includes a control unit 13. A pressure detector 9 is provided on the piston-cylinder body 1 for detecting the oil pressure within the second chamber 5. The pressure detector 9 and each control valve 7 are electrically connected to the control unit 13. The pressure detector 9 detects the oil pressure within the second chamber 5 in real time. This oil pressure is equal to the outlet pressure of the delivery pump 6, meaning that the outlet pressure of the delivery pump 6 can be detected in real time. Based on the detected pressure data, the control unit 13 switches each control valve 7, connecting the accumulator 3 corresponding to the pressure range at the outlet of the delivery pump 6 to the second chamber 5. This achieves automatic segmented pressure compensation, making the control process more intelligent and convenient.

[0024] In this embodiment, a position indicator rod 10 is connected to the piston 2. The position indicator rod 10 extends through the second chamber 5 and out of the piston-cylinder body 1. The position indicator rod 10 is in a sliding and sealing connection with the piston-cylinder body 1 and can move with the movement of the piston 2. The extended length of the position indicator rod 10 can be used to easily determine the position of the piston 2. When hydraulic oil in the second chamber 5 is insufficient, it can be added in a timely manner to ensure effective pressure compensation.

[0025] In this embodiment, an oil filling pump 11 is provided on the piston cylinder 1 , and an outlet of the oil filling pump 11 is communicated with the second chamber 5 . The oil filling pump 11 can be used to conveniently and quickly fill the second chamber 5 with hydraulic oil.

[0026] In this embodiment, the piston cylinder 1 is made of 316L stainless steel, the piston 2 is made of 2205 duplex stainless steel, and the sealing ring between the piston 2 and the piston cylinder 1 is made of perfluoroether or polytetrafluoroethylene material, which can resist corrosion from organic waste liquid and improve service life.

[0027] In this embodiment, a one-way valve 12 is provided on the pipeline connecting the outlet of the oil injection pump 11 and the second chamber 5. The one-way valve 12 allows the hydraulic oil to flow into the second chamber 5 in one direction, preventing the hydraulic oil from flowing out of the second chamber 5 in the reverse direction.

[0028] In this embodiment, the gas in the airbag 8 is nitrogen, which has high chemical stability and is safe to use.

[0029] In this embodiment, the oil injection pump 11 is a manual oil injection pump, which is easy to operate.

[0030] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A delivery pump outlet pressure stabilization and compensation device, characterized by: The invention comprises a piston cylinder, a piston and a plurality of accumulators, wherein the piston is slidingly and sealingly connected to the piston cylinder and divides the inner cavity of the piston cylinder into a first chamber and a second chamber, wherein the first chamber is connected to the outlet of the delivery pump, and the second chamber is connected to each of the accumulators via a pipeline, and a control valve is provided on the pipeline connecting each accumulator and the second chamber, and each accumulator and the second chamber are filled with hydraulic oil, and each accumulator is provided with an air bag filled with gas at different pressures; It also includes a control unit, wherein the piston cylinder is provided with a pressure detector for detecting the oil pressure in the second chamber, and the pressure detector and each of the control valves are electrically connected to the control unit; A position indicating rod is connected to the piston. The position indicating rod passes through the second chamber and extends out of the piston cylinder body. The position indicating rod is slidably and sealingly connected to the piston cylinder body and can move with the movement of the piston.

2. The delivery pump outlet pressure stabilization and compensation device according to claim 1, characterized in that: An oil injection pump is provided on the piston cylinder body, and an outlet of the oil injection pump is communicated with the second chamber.

3. The delivery pump outlet pressure stabilization and compensation device according to claim 1, characterized in that: The piston cylinder body is made of 316L stainless steel, the piston is made of 2205 duplex stainless steel, and the sealing ring between the piston and the piston cylinder body is made of perfluoroether or polytetrafluoroethylene material.

4. The delivery pump outlet pressure stabilization and compensation device according to claim 2, characterized in that: A one-way valve is provided on the pipeline connecting the outlet of the oil injection pump and the second chamber.

5. The delivery pump outlet pressure stabilization and compensation device according to claim 1, characterized in that: The gas in the airbag is nitrogen.

6. The delivery pump outlet pressure stabilization and compensation device according to claim 2, characterized in that: The oil injection pump is a manual oil injection pump.

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