Heat exchanger core grooving device

Abstract

The utility model discloses a grooving device for a heat exchanger core, and belongs to the field of heat exchanger equipment. The device comprises a movable trolley, a connecting support and a milling cutter hanging structure, the movable trolley is responsible for moving and adjusting the working position and balancing weight, the milling cutter hanging structure plays a role in counteracting the gravity of a milling cutter by means of energy storage of a coil spring in a spring balance scale, and the connecting support plays a role in connecting the movable trolley and the milling cutter hanging structure. Compared with the prior art, after the slotting device provided by the utility model is used, an operator only needs to apply forward force to the milling cutter, so that the labor intensity of workers is reduced, and the core slotting quality and the working efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the field of heat exchanger equipment, and in particular relates to a heat exchanger core grooving device. Background Art

[0002] In the heat exchanger industry, plate-fin heat exchangers are widely used in the air separation, petrochemical, and cryogenic industries due to their high heat transfer efficiency, compact structure, and strong adaptability. However, as non-standard products, the plate-fin heat exchanger manufacturing process still requires operators to adjust individual processes based on preliminary working conditions.

[0003] During the side grooving process of an aluminum core that has been brazed in a vacuum furnace, the core deforms due to heat, resulting in minor changes in the dimensions of the external structure. Employees are required to open a core groove based on the specific deformation and build up a layer of weld metal flush with the original surface of the core in the groove to facilitate subsequent welding of the head and the core. During the grooving process, operators usually need to hold a milling cutter to groove the aluminum core. Since the milling cutter is heavy and vibrates during operation, workers have high labor intensity and low work efficiency. They are also prone to fatigue after working for a long time, resulting in inconsistent grooving quality and affecting the subsequent head welding quality. In order to improve the coordination between the previous and next processes, it is necessary to provide a grooving device that solves the problems of manual grooving of aluminum cores. Utility Model Content

[0004] The purpose of the utility model is to solve the deficiencies in the prior art and provide a heat exchanger core grooving device.

[0005] The specific technical solutions adopted in this utility model are as follows:

[0006] The utility model provides a heat exchanger core grooving device, comprising a movable trolley, a connecting bracket and a hanging milling cutter structure;

[0007] The connecting bracket includes a crossbeam, an oblique support rod, a column and a support base; the support base is placed above the core to be grooved; the column is vertically arranged, the bottom of the column is fixed on the support base, and the top of the column is fixed with a crossbeam, and the crossbeam and the column are perpendicular to each other;

[0008] The movable trolley is placed above the core to be slotted and includes a counterweight box and a driving wheel and a driven wheel arranged at the bottom of the counterweight box; the top of the counterweight box is fixedly connected to the crossbeam through a plurality of oblique support rods, and a counterweight member for stabilizing the entire slotting device is placed in the counterweight box;

[0009] The suspended milling cutter structure includes a shift ring, a balance measuring device, a connecting rope and a milling cutter; the shift ring is arranged on the end of the beam different from the counterweight box, and the outer end of the beam is provided with a limiter to prevent the shift ring from slipping; the top of the balance measuring device is fixedly connected to the shift ring, and the bottom end of the balance measuring device is fixedly connected to the milling cutter below through a connecting rope, the cutter head of the milling cutter is used to open a core groove on the side wall of the core body, and the rear end fixing part of the milling cutter is fixedly connected to the connecting rope through a hoop; the total mass of the counterweight box and its internal counterweight is greater than the total mass of the suspended milling cutter structure to prevent the slotting device from tipping over.

[0010] Preferably, the driving wheel is a universal wheel, and the driven wheel is a directional wheel with a brake.

[0011] Preferably, the counterweight box is welded from five aluminum plates into an open box body.

[0012] Preferably, a handle is welded on the outer side wall of the counterweight box.

[0013] Preferably, a transverse support rod is fixed between the side wall of the counterweight box and the column.

[0014] Preferably, the balance measuring device adopts a ratchet spring balance scale.

[0015] Preferably, the connecting rope is a steel wire rope.

[0016] Preferably, the milling cutter is a holding type milling cutter.

[0017] Preferably, the limiting member is a stop pin or a limiting steel plate.

[0018] Preferably, the lever arm on the movable trolley side of the crossbeam is equal to the lever arm on the suspended milling cutter structure side.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The slotting device provided by this utility model consists of three parts: a movable carriage, a connecting bracket, and a suspended milling cutter structure. The movable carriage is responsible for moving and adjusting the working position and counterweight. The suspended milling cutter structure offsets the weight of the milling cutter by storing energy in the coil spring of a spring balance scale. The connecting bracket connects the movable carriage and the suspended milling cutter structure.

[0021] In the prior art, operators need to apply force in both the forward and upward directions to the milling cutter when performing grooving operations. After using the grooving device provided by the utility model, the operator only needs to apply force in the forward direction to the milling cutter, which reduces the labor intensity of the workers and improves the core grooving quality and work efficiency, especially when performing large-scale and long-term operations. The effect is significant. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the installation of the heat exchanger core slotting device provided in this embodiment;

[0023] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0024] Figure 3 for Figure 1 Main view of the middle structure;

[0025] Figure 4 for Figure 1 Top view of the structure;

[0026] Figure 5 for Figure 1 Left view of the middle structure;

[0027] In the figure: core 1, core groove 2, crossbeam 3, oblique support rod 4, handle 5, counterweight box 6, transverse support rod 7, driving wheel 8, driven wheel 9, limiter 10, shift ring 11, balance measuring device 12, column 13, support base 14, connecting rope 15, clamping hoop 16, milling cutter 17. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. The technical features of the various embodiments of the present invention may be combined accordingly, provided that there is no conflict between them.

[0029] like Figure 1 as well as Figure 3 、 4 As shown in Figures 5 and 6, as a preferred embodiment of the present invention, this embodiment provides a heat exchanger core slotting device, comprising a movable carriage, a connecting bracket, and a suspended milling cutter structure. The slotting device is positioned above the aluminum heat exchanger core to be slotted, and is used to slot the sidewalls of the aluminum heat exchanger core.

[0030] like Figure 2As shown, in the device provided in this embodiment, the connecting bracket includes a crossbeam 3, an oblique support rod 4, a transverse support rod 7, a column 13 and a support base 14. The support base 14 is placed above the core 1 to be grooved. The column 13 is arranged vertically, and the bottom of the column 13 is fixed to the support base 14 by welding. The top of the column 13 is fixed with the crossbeam 3 by welding, and the crossbeam 3 and the column 13 are perpendicular to each other. One end of the crossbeam 3 is used to connect to the movable trolley, and the other end of the crossbeam 3 is used to set the hanging milling cutter structure.

[0031] It should be noted that the surface where the support base 14 contacts the core 1 needs to have a large surface area to ensure that the entire device has strong stability and avoid potential safety hazards caused by rollover.

[0032] In the device provided in this embodiment, a movable trolley is placed above the core 1 to be slotted and includes a counterweight box 6 and a driving wheel 8 and a driven wheel 9 arranged at the bottom of the counterweight box 6. The top of the counterweight box 6 is fixedly connected to the crossbeam 3 via several oblique support rods 4; a counterweight is placed inside the counterweight box 6 to stabilize the entire slotting device.

[0033] In this embodiment, the driving wheels 8 at the bottom of the counterweight box 6 are universal wheels, and the driven wheels 9 are fixed wheels with brakes. Specifically, two universal wheels are provided at the front of the bottom of the counterweight box 6, and two fixed wheels are provided at the rear. Before the slotting operation, the universal wheels and the fixed wheels cooperate to rotate and move to adjust the position of the movable trolley. During the slotting operation, the fixed wheels are locked with brakes to prevent unsafe situations such as the trolley slipping.

[0034] In this embodiment, due to the high availability of aluminum materials at the construction site, the counterweight box 6 is constructed from five aluminum plates welded together into an open box. A handle 5 is welded to the outer wall of the counterweight box 6 to facilitate its movement. The handle 5 is formed by bending the plate into a U-shape and welded to the side of the box. Furthermore, transverse support rods 7 are welded between the side walls of the counterweight box 6 and the uprights 13.

[0035] In the device provided in this embodiment, the suspended milling cutter structure includes a shift ring 11, a balance measuring device 12, a connecting rope 15, a clamp 16, and a milling cutter 17. The shift ring 11 is mounted on the end of the beam 3 that is different from the counterweight box 6. A stopper 10 is fixed to the outer end of the beam 3 to prevent the shift ring 11 from sliding. In this embodiment, the stopper 10 is a stop pin. Of course, those skilled in the art can also weld a limiter steel plate to the outer end of the beam 3 to limit the position of the shift ring 11.

[0036] In this embodiment, the balance measurement device 12 utilizes a ratchet spring balance scale. A ratchet spring balance scale utilizes a ratchet mechanism and a spring to achieve balance measurement. It is commonly used in industry and instrument testing to ensure the balance and stability of equipment or components. Specifically, it uses a ratchet mechanism to adjust the spring tension, enabling precise measurement and adjustment of an object's balance. The primary advantages of this type of balance scale are its high precision and reliability, enabling stable operation in a variety of environments.

[0037] like Figure 2 As shown, the bottom end of the balance measuring device 12 is fixedly connected to the milling cutter 17 below via a connecting rope 15. In this embodiment, the milling cutter 17 is a holding milling cutter, which is divided into a cutter head at the front end and a fixed portion at the rear end. The cutter head of the milling cutter 17 is used to open the core body groove 2 on the side wall of the core body 1, and the fixed portion at the rear end of the milling cutter 17 is fixedly connected to the connecting rope 15 via a clamping member 16. Specifically, this embodiment uses two C-shaped clamps for locking and tightening with screws and nuts. The clamping member 16, to which the holding milling cutter is locked, is connected to the coil spring of the ratchet spring balance scale via the connecting rope 15 to ensure that the two are locked to each other and cannot slide or shift. The top end of the balance measuring device 12 is fixedly connected to the shift ring 11, which facilitates the adjustment of the relative distance between the milling cutter 17 and the portion of the side wall of the core body 1 where the groove needs to be opened. The connecting rope 15 can generally be made of a steel wire rope.

[0038] It should be noted that the lever arm on the movable trolley side of the crossbeam 3 and the lever arm on the side of the suspended milling cutter structure need to be substantially equal in length. The total mass of the counterweight box 6 and its internal counterweight components is greater than the total mass of the suspended milling cutter structure to prevent the slotting device from tipping over.

[0039] Before grooving with this device, the movable trolley is moved to the appropriate position, the directional wheel brakes are engaged, and the milling cutter is released. The worker then begins grooving, holding the milling cutter. After grooving is complete, the directional wheel brakes are released, and the trolley's position is adjusted using the handle, enabling the trolley to shift to the next working point. This cycle can be repeated to achieve all grooving requirements along the side of the aluminum core.

[0040] The above-described embodiment is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Persons skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any technical solution obtained by equivalent substitution or equivalent transformation falls within the scope of protection of the present invention.

Claims

1. A heat exchanger core grooving device, characterized in that: It includes a movable trolley, a connecting bracket and a hanging milling cutter structure; The connecting bracket comprises a crossbeam (3), an oblique support rod (4), a column (13) and a support base (14); the support base (14) is placed above the core (1) to be grooved; the column (13) is vertically arranged, the bottom of the column (13) is fixed on the support base (14), the top of the column (13) is fixed with the crossbeam (3), and the crossbeam (3) and the column (13) are perpendicular to each other; The movable trolley is placed above the core (1) to be slotted, and comprises a counterweight box (6) and a driving wheel (8) and a driven wheel (9) arranged at the bottom of the counterweight box (6); the top of the counterweight box (6) is fixedly connected to the crossbeam (3) through a plurality of oblique support rods (4), and a counterweight member for stabilizing the entire slotting device is placed in the counterweight box (6); The suspended milling cutter structure comprises a shift ring (11), a balance measuring device (12), a connecting rope (15) and a milling cutter (17); the shift ring (11) is sleeved on an end of the crossbeam (3) different from the counterweight box (6), and a limiter (10) is provided at the outer end of the crossbeam (3) to prevent the shift ring (11) from sliding off; the top end of the balance measuring device (12) is fixedly connected to the shift ring (11), and the bottom end of the balance measuring device (12) is fixedly connected to the milling cutter (17) below through a connecting rope (15); the cutter head of the milling cutter (17) is used to open a core groove (2) on the side wall of the core body (1), and the rear end fixed part of the milling cutter (17) is fixedly connected to the connecting rope (15) through a hoop (16); the total mass of the counterweight box (6) and its internal counterweight is greater than the total mass of the suspended milling cutter structure, so as to prevent the slotting device from tipping over.

2. The heat exchanger core grooving device according to claim 1, characterized in that: The driving wheel (8) is a universal wheel, and the driven wheel (9) is a directional wheel with a brake.

3. The heat exchanger core grooving device according to claim 1, characterized in that: The counterweight box (6) is welded from five aluminum plates into an open box body.

4. The heat exchanger core grooving device according to claim 1, characterized in that: A handle (5) is welded on the outer side wall of the counterweight box (6).

5. The heat exchanger core grooving device according to claim 1, characterized in that: A transverse support rod (7) is fixed between the side wall of the counterweight box (6) and the column (13).

6. The heat exchanger core grooving device according to claim 1, characterized in that: The balance measuring device (12) adopts a ratchet spring balance scale.

7. The heat exchanger core grooving device according to claim 1, characterized in that: The connecting rope (15) is a steel wire rope.

8. The heat exchanger core grooving device according to claim 1, characterized in that: The milling cutter (17) is a holding type milling cutter.

9. The heat exchanger core grooving device according to claim 1, characterized in that: The limiting member (10) is a stop pin or a limiting steel plate.

10. The heat exchanger core grooving device according to claim 1, characterized in that: The lever arm on the movable trolley side of the crossbeam (3) is equal to the lever arm on the suspended milling cutter structure side.

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