Plate heat exchanger assembly tool

Abstract

A plate heat exchanger assembly tool comprises a motor, a hydraulic pump, a hydraulic valve set, an oil tank, four sets of hydraulic cylinders and a PLC, the motor is used for driving the hydraulic pump, the oil tank is connected with an oil inlet of the hydraulic pump through an oil way, the hydraulic pump is connected with the hydraulic valve set, and the hydraulic valve set is connected with the four sets of hydraulic cylinders; in conclusion, according to the assembly tool for the plate heat exchanger, the four sets of hydraulic cylinders are controlled through the four sets of three-position four-way electromagnetic valves respectively, staged pressing work can be achieved, and the assembly time is saved; and moreover, the whole size is small, the weight is light, the carrying is flexible, the use is convenient, the movable pressing plate can be stably pressed and loosened, the labor intensity of disassembling and assembling the plate heat exchanger is effectively reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of plate heat exchangers, and particularly relates to an assembly tooling for plate heat exchangers. Background Technique

[0002] In China, the research and development work of plate heat exchangers started in the 1960s. The technology of plate heat exchangers has developed rapidly in China, with rapid changes and increasing popularity in applications. Among them, detachable plate heat exchangers are widely used due to their more flexible operation, more convenient installation and cleaning.

[0003] During the process of pressing and installing and disassembling and overhauling plate heat exchangers, due to the large number of plates with rubber gaskets between the pressing plates, the load borne by the pressing bolts is large and the stroke is large. Tightening or loosening and disassembling the pressing bolts requires a lot of manpower and time. The hydraulic clamp of the plate heat exchanger is a hydraulic tool designed specifically for plate heat exchangers. It can provide sufficient clamping force to ensure good sealing between the heat exchanger plates and prevent medium leakage. However, during the assembly process of the heat exchanger, the hydraulic clamp has a one-key lifting function, that is, the four hydraulic cylinders press forward simultaneously. The stroke of the hydraulic cylinder is limited, and auxiliary screws are required and the four hydraulic cylinders need to be disassembled simultaneously, which affects the assembly efficiency. Content of the Utility Model

[0004] The utility model aims to provide an assembly tooling for plate heat exchangers to solve the technical problem of low assembly efficiency of the existing hydraulic clamp.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An assembly tooling for plate heat exchangers includes a motor, a hydraulic pump, a hydraulic valve group, an oil tank, four groups of hydraulic cylinders and a PLC controller. The motor is used to drive the hydraulic pump. The oil tank is connected to the inlet of the hydraulic pump through an oil circuit. The hydraulic pump is connected with a hydraulic valve group, and the hydraulic valve group is connected with four groups of hydraulic cylinders.

[0007] The hydraulic valve group includes an overflow valve and four groups of three-position four-way solenoid valves. The hydraulic pump is connected to the inlets of the four groups of three-position four-way solenoid valves through an oil circuit. The four groups of three-position four-way solenoid valves are respectively connected with four groups of hydraulic cylinders. An overflow valve is also arranged between the hydraulic pump and the three-position four-way solenoid valves. The overflow valve is connected to the oil tank. The PLC controller is connected to the motor and all three-position four-way solenoid valves for control.

[0008] Furthermore, a pressure sensor and a position sensor are arranged in each group of hydraulic cylinders, and the PLC controller is connected to the pressure sensor and the position sensor.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model relates to an assembly tooling for a plate heat exchanger. By using four groups of three-position four-way solenoid valves to control four groups of hydraulic cylinders respectively, it can achieve staged pressing work, saving assembly time; and the overall volume is small, the weight is light, it is flexible to move and convenient to use. It can stably press and relax the movable pressing plate of the plate heat exchanger, effectively reducing the labor intensity of disassembling and assembling the plate heat exchanger and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0011] Figure 1 It is a hydraulic control diagram of an assembly tooling for a plate heat exchanger of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0013] The following further describes the present utility model in detail with reference to the embodiments.

[0014] As Figure 1 shown, a specific embodiment of an assembly tooling for a plate heat exchanger provided by the present utility model:

[0015] An assembly tooling for a plate heat exchanger includes a motor 1, a hydraulic pump 2, a hydraulic valve group, an oil tank 3, four groups of hydraulic cylinders 4 and a PLC controller. The motor 1 is used to drive the hydraulic pump 2. The oil tank 3 is connected to the inlet of the hydraulic pump 2 through an oil circuit. The hydraulic pump 2 is connected with a hydraulic valve group, and the hydraulic valve group is connected with four groups of hydraulic cylinders 4. The hydraulic cylinder 4 is used to press the movable pressing plate of the plate heat exchanger.

[0016] The motor 1 and the hydraulic pump 2 together form the power source of the device. The rotation of the motor 1 drives the hydraulic pump 2 to output hydraulic oil, which can meet the requirements of stability, constancy and synchronous forward movement of the hydraulic cylinder 4 when pressing the movable pressing plate of the plate heat exchanger, effectively ensuring the assembly quality of the plate heat exchanger.

[0017] The hydraulic valve group includes an overflow valve 5 and four groups of three-position four-way solenoid valves 6. The hydraulic pump 2 is connected to the oil inlets of the four groups of three-position four-way solenoid valves 6 through an oil circuit. The four groups of three-position four-way solenoid valves 6 are respectively connected to four hydraulic cylinders 4. An overflow valve 5 is also arranged between the hydraulic pump 2 and the three-position four-way solenoid valves 6. The overflow valve 5 is connected to the fuel tank 3. The overflow valve 5 is used to automatically open and relieve pressure when the system pressure exceeds the rated pressure, protecting the entire system. A pressure sensor 7 and a position sensor 8 are arranged in each hydraulic cylinder 4. The PLC controller is connected to all motors 1, pressure sensors 7, position sensors 8 and the four groups of three-position four-way solenoid valves 6 for control.

[0018] The working process of the present utility model is as follows: The motor 1 drives the hydraulic pump 2 to output hydraulic oil, which flows through the three-position four-way solenoid valve 6 and enters the hydraulic cylinder 4, pushing the plunger in the hydraulic cylinder 4 to drive the top plate to generate relative movement with the hydraulic cylinder 4. The PLC controller, as the central control unit, is responsible for receiving operation instructions, processing logic control, and outputting signals to each solenoid valve to achieve precise control of the hydraulic cylinder 4. The hydraulic power source is the motor 1 and the hydraulic pump 2, providing a stable pressure oil source for the entire hydraulic system. The output pressure and flow rate of the pump should be selected according to the working requirements of the hydraulic cylinder 4. The four hydraulic cylinders 4 are respectively responsible for the pressing work of different parts of the heat exchanger. Each hydraulic cylinder 4 is connected to the corresponding electromagnetic control valve through an independent oil pipe. The electromagnetic control valve is a three-position four-way solenoid valve 6. These solenoid valves are directly connected to the PLC controller and are used to control the forward, stop, backward and pressure relief actions of the hydraulic cylinder 4. A pressure sensor 7 and a position sensor 8 are arranged in the hydraulic cylinder 4 to monitor the working state of the hydraulic cylinder 4 (such as pressure value, stroke position, etc.) in real time, and feedback the data to the PLC controller to achieve closed-loop control and ensure precise control of the pressing force and position.

[0019] When compacting and assembling a plate heat exchanger, the system starts, and the PLC controller performs a self-check to confirm that all solenoid valves are in their initial states. The hydraulic pump 2 is pre-pressurized to a safe level. First, for the first compacting stage, the PLC controller sends signals to the three-position four-way solenoid valves 6 corresponding to the first two hydraulic cylinders 4, and these two hydraulic cylinders 4 start the compacting operation until the preset pressure or stroke position is reached. The pressure sensor 7 and the position sensor 8 feedback information, and the PLC controller confirms the compacting state. Then, for the second compacting stage, after ensuring that the first two cylinders have been correctly compacted, the PLC controller controls the solenoid valves of the last two hydraulic cylinders 4 to perform the second-stage compacting to further consolidate the assembled state of the heat exchanger. If necessary, the PLC controller can control some or all of the hydraulic cylinders 4 for fine adjustment or pressure relief to facilitate calibration or inspection. This process can be executed manually by inputting commands or automatically according to a preset program. According to the assembly requirements, the PLC can execute the above steps in a loop according to the established program until the entire heat exchanger is assembled and all compacting points meet the requirements. After completing all operations, the PLC issues an instruction, and the hydraulic pump 2 stops working, and the system enters the standby or shutdown state. Through the above design, this hydraulic control system can significantly improve the automation degree and efficiency of heat exchanger assembly, while ensuring the assembly quality and reducing the need for manual intervention.

[0020] It should be noted that in this article, terms such as "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device.

[0021] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plate heat exchanger assembly tool, characterized in that: It includes a motor, a hydraulic pump, a hydraulic valve group, an oil tank, four groups of hydraulic cylinders and a PLC controller. The motor is used to drive the hydraulic pump. The oil tank is connected to the oil inlet of the hydraulic pump through an oil circuit. The hydraulic pump is connected to the hydraulic valve group, and the hydraulic valve group is connected to the four groups of hydraulic cylinders. The hydraulic valve group includes an overflow valve and four groups of three-position four-way solenoid valves. The hydraulic pump is connected to the oil inlets of the four groups of three-position four-way solenoid valves through an oil circuit. The four groups of three-position four-way solenoid valves are respectively connected to four groups of hydraulic cylinders. An overflow valve is also arranged between the hydraulic pump and the three-position four-way solenoid valve. The overflow valve is connected to the oil tank. The PLC controller is controlled and connected to the motor and all the three-position four-way solenoid valves.

2. The plate heat exchanger assembly tool according to claim 1, characterized in that: A pressure sensor and a position sensor are arranged in each group of hydraulic cylinders, and the PLC controller is connected with the pressure sensor and the position sensor.

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