A tube expander for plate heat exchangers

Abstract

This utility model relates to a tube expander for plate heat exchangers, belonging to the field of tube processing technology. The tube expander for plate heat exchangers includes an installation assembly, which includes a worktable. A limiting component is fixedly installed at the bottom of the worktable, and a tube expander is slidably installed on the top of the worktable. An adjusting component, hinged to the tube expander, is fixedly installed at the middle position of the top of the worktable. Through the structural design of the installation and adjusting components, this utility model enables the driving and adjusting function of the tube expander, facilitating the later expansion and connection of plate heat exchangers of different lengths. This increases the convenience and flexibility of the tube expander's later adjustment and effectively expands its later expansion range. Compared to the fixed operation of a single type of plate heat exchanger, this adjustable tube expander has a wider working range, ensuring its practicality and flexibility in later operation.

Description

Technical Field

[0001] This utility model belongs to the field of pipe processing technology, specifically relating to a tube expander for plate heat exchangers. Background Technology

[0002] A hydraulic tube expander is a specialized hydraulic expansion device used in the manufacturing of equipment such as heat exchangers, condensers, and high-pressure heaters to expand and tighten tubes and tube sheets. Plate heat exchangers are made up of a series of metal plates with a certain corrugated shape stacked together. The internal metal plates need to be connected by pipes to form heat exchange channels. The tube expander is a specialized device used in the manufacturing of heat exchangers to achieve the expansion and tightening connection between pipes and metal plates. Therefore, it is necessary to design a tube expander for plate heat exchangers.

[0003] For example, Chinese utility model patent CN217665907U, entitled "A Tube Expander for Plate Heat Exchangers," includes a frame, a worktable, a tube expanding mechanism, and a pushing mechanism. The worktable is located at the bottom of the frame, and the tube expanding mechanism and the pushing mechanism are correspondingly arranged to form a tube expanding unit. There are four sets of tube expanding units. Positioning grooves for positioning the tube expanding fittings are opened in the corresponding corner holes on the worktable. This tube expanding machine replaces the traditional single-unit tube expanding by using four sets of tube expanding units with corresponding corner holes. The workpiece can be expanded and connected in one press, which effectively improves processing efficiency. However, the four sets of tube expanding units in the above-mentioned prior art are designed with a fixed structure and do not have the adjustment function of the tube expanding unit. This results in the tube expanding machine being able to only perform tube expanding and connecting workpieces of a fixed model, reducing the applicability and the convenience and flexibility of the tube expanding machine in later use. Utility Model Content

[0004] The purpose of this invention is to provide a tube expander for plate heat exchangers that has a simple structure and reasonable design in order to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A tube expander for plate heat exchangers includes an installation assembly. The installation assembly includes a worktable, a limiting assembly fixedly installed at the bottom of the worktable, a tube expander slidably installed above the top of the worktable, and an adjusting assembly hingedly connected to the tube expander slidably installed at the middle position above the top of the worktable.

[0007] As a further optimization of this utility model, the installation assembly also includes four support rods fixedly installed at the four corners of the top of the workbench. A top plate is installed on the top of the four support rods. Through grooves are opened on both sides inside the top plate, and guide grooves are opened at both ends of the top of the workbench.

[0008] As a further optimization of this utility model, the limiting component includes openings at both ends inside the workbench, and a limiting plate slides through the interior of both openings. A limiting sleeve is fixedly installed at the bottom of the workbench, and a bidirectional screw is rotatably inserted inside the limiting sleeve. The bidirectional screw is threaded through to the inner bottom of the limiting plate.

[0009] As a further optimization of this utility model, the tube expansion assembly includes two mounting slides that are slidably connected inside two through slots. Hydraulic cylinders are fixedly installed at both ends of the top of the two mounting slides, and tube expansion heads that penetrate into the interior of the mounting slides are fixedly installed at the output ends of the bottom of the two hydraulic cylinders on the same side.

[0010] As a further optimization of this utility model, the tube expansion assembly also includes a connecting plate fixed on the opposite side of the two mounting slides, and a placement seat placed below the tube expansion head is slidably connected to the adjacent side of the two guide slides, and the opposite side of the two placement seats is fixedly connected to the connecting plate.

[0011] As a further optimization of this utility model, the adjustment component includes a servo motor fixedly installed at the middle position of the top of the top plate. A threaded rod is fixedly installed at the output end of the top of the servo motor. A U-shaped fixing bracket fixedly connected to the top of the top plate is rotatably installed on the top of the threaded rod. An internal threaded collar is threadedly fitted on the top of the outer side of the threaded rod. Hinged rods are hingedly installed on both sides outside the internal threaded collar. The bottom of the two hinged rods is hingedly connected to the top of the two mounting slides.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. Through the structural design of the installation and adjustment components, this utility model can realize the driving and adjustment function of the tube expansion component, so as to facilitate the tube expansion and connection function of plate heat exchangers of different lengths in the later stage. This increases the convenience and flexibility of the tube expansion machine in the later adjustment and use, and effectively expands its tube expansion range. Compared with the fixed operation of a single model of plate heat exchanger, this tube expansion machine that can be used for adjustment has a wider working range, ensuring its practicality and flexibility in later operation and use.

[0014] 2. This utility model, through the structural design of the limiting component, can easily realize the limiting and fixing of the plate heat exchanger, ensuring the accuracy of the subsequent tube expansion. Moreover, the limiting structure design of this structure has higher stability than the traditional spring-resistance limiting function, and will not cause the plate heat exchanger to shift in the event of accidental collision, thus ensuring the efficiency of the subsequent tube expansion. Attached Figure Description

[0015] Figure 1This is a front view of the overall structure of this utility model;

[0016] Figure 2 This is a bottom view of the overall structure of this utility model;

[0017] Figure 3 This is a three-dimensional structural diagram of the tube expansion assembly of this utility model.

[0018] In the diagram: 1. Mounting assembly; 100. Workbench; 101. Support rod; 102. Top plate; 103. Through groove; 104. Guide slide; 2. Limiting assembly; 200. Opening groove; 201. Bidirectional screw; 202. Limiting plate; 203. Limiting sleeve; 3. Tube expansion assembly; 300. Hydraulic cylinder; 301. Tube expansion head; 302. Connecting plate; 303. Placement seat; 304. Mounting slide; 4. Adjusting assembly; 400. Threaded rod; 401. Hinge rod; 402. Servo motor; 403. Internal threaded collar; 404. U-shaped fixing frame. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] Example 1

[0021] like Figure 1 , Figure 2 As shown, a tube expander for a plate heat exchanger includes a horizontally positioned workbench 100, which serves as the basic load-bearing structure for the entire device. Four support rods 101 are vertically fixed at the four corners of the top of the workbench 100. The tops of the four support rods 101 are connected to a horizontal top plate 102, forming a stable frame structure. A through groove 103 is formed on each side of the top plate 102, extending along the length of the top plate. Limiting grooves are formed at both ends of each through groove 103, with a limiting block sliding inside each limiting groove. Correspondingly, two guide grooves 104 are also formed at both ends of the top of the workbench 100. The guide grooves 104 are parallel to the through grooves 103, providing guidance for the sliding of subsequent components. Guide grooves are formed at both ends of each guide groove 104, with guide sliders slidably connected inside each of the two guide grooves.

[0022] like Figure 1 , Figure 2As shown, to achieve stable positioning of the plate heat exchanger, an opening slot 200 is provided at each end of the workbench 100. The opening slot 200 penetrates the upper and lower surfaces of the workbench. A limiting plate 202 slides through each of the two opening slots 200. Multiple limiting grooves (not shown in the figure) are provided at the ends of the two limiting plates 202 that are close to each other. This facilitates the limiting and engaging of the plate heat exchanger, further improving the stability of the plate heat exchanger's fixation and preventing upward movement during subsequent operation. The inner bottom of both limiting plates 202... The worktable 100 has an internal threaded hole, and the limiting plate 202 can slide horizontally along the opening groove 200. A limiting sleeve 203 is fixedly installed at the center of the bottom of the worktable 100. The bidirectional screw 201 rotates through the inside of the limiting sleeve 203, and both ends of the bidirectional screw 201 are threaded through to the inner bottom of the two limiting plates 202 and engage with the internal threaded hole. When the bidirectional screw 201 is rotated, the two limiting plates 202 will move towards or away from each other along the opening groove 200 under the action of the thread, thereby achieving clamping and limiting of plate heat exchangers of different widths.

[0023] like Figure 1 , Figure 2 , Figure 3 As shown, to complete the actual pipe expansion operation, mounting slides 304 are slidably connected inside the two through grooves 103 on both sides of the top plate 102. The two ends of the mounting slides 304 are fixedly connected to guide sliders at both ends of the through grooves 103, which improves the stability of the sliding displacement of the mounting slides 304. The mounting slides 304 can slide along the through grooves 103. A hydraulic cylinder 300 is fixedly installed at each end of the top of the two mounting slides 304. A pipe expansion head 301 is fixedly connected to the output end of the bottom of the two hydraulic cylinders 300 on the same side. The pipe expansion head 301 penetrates the interior of the mounting slide 304 and extends vertically downwards for pipe expansion operations. Connecting plates with the same through grooves 103 penetrating into the interior of the top plate 102 are fixedly installed on the opposite sides of the two mounting slides 304. 302. Inside the two guide slides 104 of the workbench 100, a placement seat 303 is slidably connected to the side near the middle. The placement seat 303 is located directly below the tube expander head 301 and is used to place the plate heat exchanger component to be expanded. The two ends of the placement seat 303 are fixedly connected to the guide slide block 2 to improve the stability of the sliding connection of the placement seat 303. The two ends of the top of the placement seat 303 are provided with positioning grooves to realize the support and positioning operation at the four corner holes of the plate heat exchanger. The two sides of the two placement seats 303 that are far apart are fixedly connected to the corresponding connecting plates 302. When the mounting slide 304 slides, it will drive the placement seat 303 to slide synchronously along the guide slide 104 through the connecting plate 302 to ensure that the positions of the placement seat 303 and the tube expander head 301 are always corresponding.

[0024] like Figure 1 , Figure 2 , Figure 3 As shown, to accommodate plate heat exchangers of different specifications, a servo motor 402 is fixedly installed at the center of the top of the workbench 100. The servo motor 402 is an MPL-B430P model. A threaded rod 400 is fixedly connected to the top output end of the servo motor 402. A U-shaped fixing bracket 404 is rotatably mounted on the top of the threaded rod 400 via a bearing. The two ends of the bottom of the U-shaped fixing bracket 404 are fixedly connected to the top of the top plate 102. The top threaded sleeve on the outer side of the threaded rod 400 is... The device comprises an internally threaded collar 403, with a hinge rod 401 hinged to each of its two outer sides. The bottoms of the two hinge rods 401 are respectively hinged to the tops of the two mounting slides 304. When the servo motor 402 drives the threaded rod 400 to rotate, the internally threaded collar 403 will move up and down along the threaded rod 400, thereby driving the two mounting slides 304 to move towards or away from each other in the through groove 103 through the hinge rods 401, thereby adjusting the distance between the expansion tube heads 301.

[0025] It should be noted that, in the operation of this tube expander for plate heat exchangers, the operator can first move the installation assembly 1 and above to the designated location and connect the power supply. Then, according to the specifications of the plate heat exchanger to be processed, the servo motor 402 is started, and the internal threaded collar 403 is driven to move up and down on its outside by rotating the threaded rod 400. Then, the hinge rod 401 drives the two mounting slides 304 to move the placement seat 303 inside the guide slide groove 104 through the connecting plate 302, so that the four corners of the plate heat exchanger plate are aligned with the positioning grooves on the placement seat 303. Finally, the distance between the two limiting plates 202 is adjusted by rotating the bidirectional screw 201 to fix the plate heat exchanger plate. Then, the hydraulic cylinder 300 is started to drive the tube expander head 301 downward to complete the expansion operation. The entire equipment has a compact structure, is easy to adjust, and can efficiently complete the tube expansion processing of plate heat exchangers.

[0026] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A tube expander for plate heat exchangers, comprising an installation assembly (1), characterized in that, The mounting assembly (1) includes a workbench (100), a limiting assembly (2) is fixedly installed at the bottom of the workbench (100), an expansion tube assembly (3) is slidably installed above the top of the workbench (100), and an adjustment assembly (4) is fixedly installed at the middle position above the top of the workbench (100) and is hingedly connected to the expansion tube assembly (3).

2. The tube expander for a plate heat exchanger according to claim 1, characterized in that: The mounting assembly (1) also includes four support rods (101) fixedly installed at the four corners of the top of the workbench (100). The top of the four support rods (101) is jointly mounted on a top plate (102). The top plate (102) has through grooves (103) on both sides inside, and guide grooves (104) are provided at both ends of the top of the workbench (100).

3. A tube expander for a plate heat exchanger according to claim 2, characterized in that: The limiting component (2) includes opening slots (200) at both ends inside the worktable (100). A limiting plate (202) slides through the interior of both opening slots (200). A limiting sleeve (203) is fixedly installed at the bottom of the worktable (100). A bidirectional screw (201) rotates through the interior of the limiting sleeve (203). The bidirectional screw (201) is threaded through to the inner bottom of the limiting plate (202).

4. A tube expander for a plate heat exchanger according to claim 2, characterized in that: The tube expansion assembly (3) includes two mounting slides (304) that are slidably connected inside two through slots (103). Hydraulic cylinders (300) are fixedly installed at both ends of the top of the two mounting slides (304). Tube expansion heads (301) that penetrate into the mounting slides (304) are fixedly installed at the output ends of the bottom of the two hydraulic cylinders (300) on the same side.

5. A tube expander for a plate heat exchanger according to claim 4, characterized in that: The tube expansion assembly (3) also includes a connecting plate (302) fixed on the opposite side of the two mounting slides (304). The two guide slides (104) are slidably connected to a placement seat (303) located below the tube expansion head (301) on the adjacent side. The opposite side of the two placement seats (303) is fixedly connected to the connecting plate (302).

6. A tube expander for a plate heat exchanger according to claim 5, characterized in that: The adjustment assembly (4) includes a servo motor (402) fixedly installed at the middle position of the top of the top plate (102). A threaded rod (400) is fixedly installed at the output end of the top of the servo motor (402). A U-shaped fixing bracket (404) fixedly connected to the top of the top plate (102) is rotatably installed on the top of the threaded rod (400). An internal threaded collar (403) is threadedly fitted on the top outside of the threaded rod (400). Hinged rods (401) are hingedly installed on both sides outside the internal threaded collar (403). The bottom of the two hinged rods (401) is hingedly connected to the top of the two mounting slides (304).

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