Plate heat exchanger of assembled construction

Abstract

This utility model relates to the field of heat transfer technology, and discloses a plate heat exchanger with an assembled structure, including a fixed plate, a movable clamping plate, a guide rod, and stacked heat exchange plates. The surface of the fixed plate is provided with a fluid interface and a control and display unit. An alarm device is installed on the guide rod. The movable clamping plate moves along the guide rod with the assistance of rollers and is connected to the fixed plate by multiple sets of screws. The outer end of the screw is equipped with a pressure force sensor, and an adjusting nut and a locking nut are connected in sequence by threads. This utility model monitors the clamping force of each nut in real time through the pressure force sensor and displays it in digital form. With the alarm system, it can promptly alert when the pressure is abnormal. During the diagonal tightening of the screws, it helps to avoid single-point overtightening, realizes pressure data monitoring and preventive maintenance, and improves the reliability and maintenance efficiency of equipment management.

Description

Technical Field

[0001] This utility model relates to the field of heat transfer technology, specifically a plate heat exchanger with an assembled structure. Background Technology

[0002] Plate heat exchangers are a type of high-efficiency heat exchanger composed of a series of metal plates with a certain corrugated shape. Under current technology, due to their working method, plate heat exchangers often accumulate scale and other deposits on the heat exchange plates, requiring periodic cleaning. However, the existing method for disassembling and assembling them involves tightening the screws diagonally in sequence, with strict control over the torque. But the common method of adjusting with a torque wrench results in large variations in the actual clamping force even with the same torque, due to different friction coefficients. Therefore, this process is highly dependent on the operator's experience. If the installation is not carried out according to the above requirements, it will lead to local stress concentration, deformation of the heat exchange plates, and render the machine unusable.

[0003] In view of this, we propose a plate heat exchanger with a modular structure. Summary of the Invention

[0004] The purpose of this invention is to provide a plate heat exchanger with an assembled structure to solve the problems mentioned in the background art.

[0005] A modular plate heat exchanger (BR0.5) is characterized by comprising a fixed plate, a movable clamping plate, a guide rod, and multiple heat exchange plates. The fixed plate and the movable clamping plate are arranged opposite each other via the guide rod. The heat exchange plates are stacked between the fixed plate and the movable clamping plate. The fixed plate and the movable clamping plate are connected by multiple sets of fasteners to press the stacked heat exchange plates together. The fasteners include a through-type screw, a pressure force sensor (VR808) sleeved on the screw and located outside the movable clamping plate, and an adjusting nut threaded to the end of the screw. The plate heat exchanger also includes a control and display unit electrically connected to the pressure force sensor.

[0006] Preferably, the adjusting nut is further threaded with a locking nut for preventing loosening.

[0007] Preferably, the plate heat exchanger further includes an alarm device electrically connected to the compressive force sensor and the control and display unit.

[0008] Preferably, the alarm device is an audible and visual alarm (LTD-5061) installed on the guide rod.

[0009] Preferably, the movable clamping plate is equipped with rollers that cooperate with the guide rod.

[0010] Preferably, the surface of the fixing plate is provided with two sets of fluid interfaces, one set being a short pipe with a flange interface, and the other set being an internal thread interface with a bevel.

[0011] Preferably, the edges of the fixed plate and the movable clamping plate are evenly arranged with grooves for accommodating the screw.

[0012] Preferably, the heat exchange plate has positioning grooves at its upper and lower ends that cooperate with the guide rod.

[0013] Preferably, the control and display unit is a system consisting of a display and a programmable logic controller (PLC).

[0014] Beneficial effects

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: the pressure of each nut can be displayed digitally and it is equipped with an alarm system. It is only necessary to tighten the screws in a diagonal order, which helps to avoid the problem of overtightening a single screw. It also facilitates the subsequent management of the machine status. When the pressure is abnormal, the problem can be investigated and dealt with in time, thus completing the transformation from post-maintenance to data-driven preventive maintenance. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of the present invention;

[0017] Figure 2 This is the front view of the present invention;

[0018] Figure 3 This is a left-side view of the present invention;

[0019] Figure 4 This is a top view of the present invention;

[0020] Figure 5 This is a right-side view of the present invention.

[0021] The following are the labels in the diagram: 1. Fixed plate; 2. Movable clamping plate; 3. Guide rod; 4. Bracket; 5. Heat exchange plate; 6. Screw; 7. Pressure force sensor; 8. Adjusting nut; 9. Locking nut; 10. Control and display unit; 11. Roller; 12. Alarm device. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Please see Figure 1-5 This utility model provides a technical solution:

[0026] A modular plate heat exchanger includes a fixed plate 1, a movable clamping plate 2, a guide rod 3, and multiple heat exchange plates 5. The fixed plate 1 and the movable clamping plate 2 are positioned opposite each other via the guide rod 3. The heat exchange plates 5 are stacked between the fixed plate 1 and the movable clamping plate 2. The fixed plate 1 and the movable clamping plate 2 are connected by multiple sets of fasteners to press the stacked heat exchange plates 5 together. The fasteners include a through-type screw 6, a pressure force sensor 7 sleeved on the screw 6 and located outside the movable clamping plate 2, and an adjusting nut 8 threadedly connected to the end of the screw 6. The plate heat exchanger also includes a control and display unit 10 electrically connected to the pressure force sensor 7. The outer side of the nut 8 is also threaded with a locking nut 9 for preventing loosening. The plate heat exchanger also includes an alarm device 12 electrically connected to the pressure sensor 7 and the control and display unit 10. The alarm device 12 is an audible and visual alarm, which is installed on the guide rod 3. The movable clamping plate 2 is equipped with rollers 11 that cooperate with the guide rod 3. The surface of the fixed plate 1 is provided with two sets of fluid interfaces, one of which is a short pipe with a flange interface and the other is an internal thread interface with a bevel. The edges of the fixed plate 1 and the movable clamping plate 2 are evenly arranged with grooves for accommodating the screw 6. The upper and lower ends of the heat exchange plate 5 are provided with positioning grooves that cooperate with the guide rod 3.

[0027] It should be explained that the force sensor 7 transmits the clamping force of the adjusting nut 8 to the PLC via an electrical signal. The PLC then outputs an electrical signal to the control and display unit 10 and the alarm device 12. The circuits of the force sensor 7 converge into one, pass through the hole above the movable clamping plate 2, along the guide rod 3, and through the hole on the fixed plate 1 to the control and display unit 10. The control and display unit 10 has a circuit that connects upward to the alarm device 12.

[0028] Understandably, after cleaning the heat exchanger 5, the guide rods 3 corresponding to the upper and lower grooves of the heat exchanger 5 are installed. Finally, the movable clamping plate 2, suspended above the guide post 3, is pushed towards the heat exchanger 5 with the assistance of the roller 11, clamping the heat exchanger 5 between the fixed plate 1 and the movable clamping plate 2. Then, the screw 6 is inserted into the grooves corresponding to the fixed plate 1 and the movable clamping plate 2, with the fixed end of the screw 6 placed on the outside of the fixed plate 1 and the end of the screw 6 penetrating into the groove of the movable clamping plate 2. A pressure sensor 7 is sleeved on the end of the screw 6 near the outside of the movable clamping plate 2. An adjusting nut 8 is threaded onto the other end of the force sensor 7. First, install the force sensor 7 and adjusting nut 8 onto the end of each screw 6. Then, tighten the adjusting nuts 8 diagonally in sequence. Adjust according to the pressure feedback of each adjusting nut 8 displayed on the control and display unit 10. When the pressure is greater than or equal to the set value, the alarm device 12 starts to flash and sound. After each adjusting nut 8 is adjusted to the standard pressure range, screw in and tighten the locking nut 9 on the other end of the corresponding adjusting nut 8 to lock the position of the adjusting nut 8 and prevent it from loosening.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A plate heat exchanger of the assembled type, c h a r a c t e r i s e d in that The plate heat exchanger includes a fixed plate (1), a movable clamping plate (2), a guide rod (3), and multiple heat exchange plates (5). The fixed plate (1) and the movable clamping plate (2) are arranged opposite to each other through the guide rod (3). The heat exchange plates (5) are stacked between the fixed plate (1) and the movable clamping plate (2). The fixed plate (1) and the movable clamping plate (2) are connected by multiple sets of fasteners to press the stacked heat exchange plates (5). The fasteners include a through screw (6), a pressure force sensor (7) sleeved on the screw (6) and located outside the movable clamping plate (2), and an adjusting nut (8) threaded to the end of the screw (6). The plate heat exchanger also includes a control and display unit (10) electrically connected to the pressure force sensor (7).

2. A plate heat exchanger of the kind defined by claim 1, c h a r a c t e r i s e d in that: The adjusting nut (8) is also threaded with a locking nut (9) for preventing loosening.

3. A plate heat exchanger of the kind defined by claim 1, c h a r a c t e r i s e d in that: The plate heat exchanger also includes an alarm device (12) electrically connected to the compressive force sensor (7) and the control and display unit (10).

4. A plate heat exchanger with an assembled structure according to claim 3, characterized in that: The alarm device (12) is an audible and visual alarm, which is installed on the guide rod (3).

5. A plate heat exchanger with an assembled structure according to claim 1, characterized in that: The movable clamping plate (2) is equipped with rollers (11) that cooperate with the guide rod (3).

6. A plate heat exchanger with an assembled structure according to claim 1, characterized in that: The surface of the fixing plate (1) is provided with two sets of fluid interfaces, one of which is a short pipe with a flange interface, and the other is an internal thread interface with a bevel.

7. A plate heat exchanger with an assembled structure according to claim 1, characterized in that: The edges of the fixed plate (1) and the movable clamping plate (2) are evenly arranged with grooves for accommodating the screw (6).

8. A plate heat exchanger with an assembled structure according to claim 1, characterized in that: The heat exchange plate (5) is provided with positioning grooves at its upper and lower ends that cooperate with the guide rod (3).

9. A plate heat exchanger with an assembled structure according to claim 1, characterized in that: The control and display unit (10) is a system consisting of a display and a programmable logic controller (PLC).

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