Auxiliary welding jig for floating coil pipe in semi-instant heat exchanger

Abstract

The utility model relates to an auxiliary welding jig for a floating coil pipe in a semi-instant heat exchanger, which comprises a circular base, a cylindrical central positioning column is formed in the middle of the base, and a vertical right positioning clamping groove and a vertical left positioning clamping groove are formed on two opposite side walls of the central positioning column. A plurality of vertical arc-shaped left positioning separation blades and right positioning separation blades are fixedly connected to the positions, on the left side and the right side of the center positioning column, of the base respectively, and a left bearing notch and a right bearing notch are formed in one side of each left positioning separation blade and one side of each right positioning separation blade respectively. According to the auxiliary welding jig, the coil pipe and the connecting pipe on the floating coil pipe can be conveniently positioned, and welding operation of the floating coil pipe is facilitated.

Description

Technical fields:

[0001] This utility model relates to the technical field of auxiliary welding fixtures for heat exchangers, and more specifically to an auxiliary welding fixture for floating coils inside a semi-instantaneous heat exchanger. Background technology:

[0002] A floating coil heat exchanger is an indirect heat exchanger. The heat transfer section uses copper tubes, which are spirally arranged and float within the shell, hence the name "floating coil." Floating coil heat exchangers are a typical piece of equipment in domestic hot water centralized heating systems in recent years. The heat exchanger shell contains a pair of main inlet and outlet pipes, with multiple floating coils positioned between them. Each floating coil has connecting pipes that can be connected to the inlet and outlet pipes respectively. The structure of the floating coil... Figure 2 As shown, a single floating coil has multiple concentric spiral coils, with both ends of the coils welded to the connecting pipes. Currently, the welding process involves clamping the ends of the coils and the connecting pipes together with clamps, first using spot welding to achieve the positioning connection between the coils and the connecting pipes, and then performing circumferential welding for sealing. This requires that the ends of each coil be clamped, and the welding points need to be arranged, which is quite troublesome. Therefore, an auxiliary tooling is needed to facilitate the welding of floating coils. Utility Model Content:

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing an auxiliary welding fixture for floating coils in a semi-instantaneous heat exchanger. This auxiliary welding fixture facilitates the positioning of the coils and connecting pipes on the floating coils, making the welding operation of the floating coils easier.

[0004] An auxiliary welding fixture for floating coils in a semi-instantaneous heat exchanger includes a circular base, a cylindrical central positioning post formed in the middle of the base, vertical right positioning slots and left positioning slots formed on the opposite side walls of the central positioning post, and several vertical left positioning baffles and right positioning baffles fixed to the base on the left and right sides of the central positioning post, respectively. A left support groove and a right support groove are formed on one side of the left positioning baffle and the right positioning baffle, respectively.

[0005] A horizontal right support rod is inserted and fixed on the right positioning baffle below the right support slot. The left end of the right support rod is inserted and fixed on the central positioning post, and the right end extends out of the right positioning baffle and is formed into a D-shaped screw. The screw is fitted with a vertical clamping plate, and a nut is screwed onto the screw on the right side of the clamping plate. A horizontal longitudinal rear support rod is inserted and fixed on the rear side wall of the central positioning post, and the rear support rod is located above the right support rod.

[0006] Preferably, the auxiliary welding fixture is equipped with a floating coil, which consists of several spiral heat exchange coils and inlet and outlet pipes located at both ends of the heat exchange coils.

[0007] The liquid inlet pipe is placed in the right support slot of the right positioning baffle. One end of the liquid inlet pipe near the central positioning post is inserted into the right positioning slot of the central positioning post, and the other end abuts against the clamp plate. The liquid outlet pipe is placed in the left support slot of the left positioning baffle. The end of the liquid outlet pipe is inserted into the left positioning slot of the central positioning post. The heat exchange coil is sleeved on the outside of the central positioning post. The outer wall of the heat exchange coil abuts against the outer wall of the left and right positioning baffles or the outer wall of the central positioning post. The lower outer wall of the heat exchange coil abuts against the right support rod and the rear support rod. The two ends of the heat exchange coil abut against the liquid inlet pipe and the liquid outlet pipe, respectively.

[0008] Preferably, the central axis of the left positioning baffle, the central axis of the right positioning baffle, and the central axis of the central positioning post coincide.

[0009] Preferably, the groove of the left support slot on the left positioning baffle faces the end of the heat exchange coil, and the groove of the right support slot on the right positioning baffle faces the end of the heat exchange coil.

[0010] Preferably, the lower bottom surface of the left support groove on the left positioning baffle is located below the lower bottom surface of the right support groove on the right positioning baffle.

[0011] Preferably, the width and depth of the right positioning slot on the central positioning post are equal to the width and depth of the left positioning slot, and the width of the left positioning slot is equal to the outer diameter of the liquid outlet connector.

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

[0013] This auxiliary welding fixture facilitates the positioning of the coils and connecting pipes on the floating coil, making the welding operation of the floating coil easier. Attached image description:

[0014] Figure 1 This is a three-dimensional positional diagram of the present invention;

[0015] Figure 2 A side view of the structure of this utility model with a floating coil;

[0016] Figure 3 A front view schematic diagram of the structure of this utility model with a floating coil;

[0017] Figure 4 This is a top view of the structure of the present invention with a floating coil.

[0018] In the diagram: 1. Base; 2. Center positioning post; 3. Right positioning baffle; 31. Right support slot; 4. Left positioning baffle; 41. Left support slot; 5. Right support rod; 51. Screw; 6. Clamping plate; 7. Nut; 8. Rear support rod; 9. Floating coil; 91. Heat exchange coil; 92. Liquid inlet pipe; 93. Liquid outlet pipe. Detailed implementation method:

[0019] Example: See Figures 1 to 4 As shown, an auxiliary welding fixture for a floating coil in a semi-instantaneous heat exchanger includes a circular base 1. A cylindrical central positioning post 2 is formed in the middle of the base 1. Vertical right positioning slots 21 and left positioning slots 22 are formed on the opposite side walls of the central positioning post 2. Several vertical left positioning baffles 4 and right positioning baffles 3 in the shape of arcs are fixed to the base 1 on the left and right sides of the central positioning post 2, respectively. A left support groove 41 and a right support groove 31 are formed on one side of the left positioning baffles 4 and right positioning baffles 3, respectively.

[0020] A horizontal right support rod 5 is inserted and fixed on the right positioning baffle 3 on the lower side of the right support slot 31. The left end of the right support rod 5 is inserted and fixed on the central positioning post 2, and the right end extends out of the right positioning baffle 3 and is formed into a D-shaped screw rod 51. The screw rod 51 is fitted with a vertical clamping plate 6, and a nut 7 is screwed onto the screw rod 51 on the right side of the clamping plate 6. A horizontal longitudinal rear support rod 8 is inserted and fixed on the rear side wall of the central positioning post 2. The rear support rod 8 is located above the right support rod 5, and the fixture is moved by holding the rear support rod 8.

[0021] The auxiliary welding fixture is equipped with a floating coil 9. The floating coil 91 consists of several spiral heat exchange coils 91 and liquid inlet pipes 92 and liquid outlet pipes 93 located at both ends of the heat exchange coils 91. The floating coil 9 is required to receive liquid through the liquid inlet pipe 92, then flow through the heat exchange coils 91 for heat exchange, and finally flow out through the liquid outlet pipe 93.

[0022] The liquid inlet pipe 92 is placed in the right support slot 31 of the right positioning baffle 3. One end of the liquid inlet pipe 92 near the central positioning post 2 is inserted into the right positioning slot 21 of the central positioning post 2, and the other end abuts against the clamping plate 6. The liquid outlet pipe 93 is placed in the left support slot 41 of the left positioning baffle 4. The end of the liquid outlet pipe 93 is inserted into the left positioning slot 22 of the central positioning post 2. The heat exchange coil 91 is sleeved on the outside of the central positioning post 2. The outer wall of the side wall of the heat exchange coil 91 abuts against the outer wall of the left positioning baffle 4 and the right positioning baffle 3 or the outer wall of the central positioning post 2, respectively. The lower outer wall of the heat exchange coil 91 abuts against the right support rod 5 and the rear support rod 8, respectively. The two ends of the heat exchange coil 91 abut against the liquid inlet pipe 92 and the liquid outlet pipe 93, respectively.

[0023] The central axis of the left positioning baffle 4, the central axis of the right positioning baffle 3, and the central axis of the central positioning post 2 coincide.

[0024] The slot of the left support groove 41 on the left positioning baffle 4 faces the end of the heat exchange coil 91, and the slot of the right support groove 31 on the right positioning baffle 3 faces the end of the heat exchange coil 91. Thus, the liquid outlet pipe 93 or the liquid inlet pipe 92 can be used to position the heat exchange coil 91 in a rotating manner, effectively realizing the positioning of the heat exchange coil 91.

[0025] The lower bottom surface of the left support groove 41 on the left positioning baffle 4 is located below the lower bottom surface of the right support groove 31 on the right positioning baffle 3.

[0026] The width and depth of the right positioning slot 21 on the central positioning post 2 are equal to the width and depth of the left positioning slot 22, respectively. The width of the left positioning slot 22 is equal to the outer diameter of the liquid outlet connector 93.

[0027] Working principle: This structure is an auxiliary welding fixture for the floating coil in a semi-instantaneous heat exchanger. It mainly assists in the welding of the heat exchange coil 91 on the floating coil 9 with the liquid inlet pipe 92 and the liquid outlet pipe 93.

[0028] In use, first set the liquid outlet pipe 93 on this fixture, then place the heat exchange coil 91, and place the lower end of the heat exchange coil 91 against the liquid outlet pipe 93. Then place the liquid inlet pipe 92. By rotating the liquid inlet pipe 92, the interface on the liquid inlet pipe 92 is aligned with the port of the floating coil 9. Finally, by rotating the nut 7, the clamp 6 is pressed against the liquid inlet pipe 92 to position the liquid inlet pipe 92 and prevent the liquid inlet pipe 92 from rotating during welding. Then the upper port of the heat exchange coil 91 and the liquid inlet pipe 92 can be welded. The welding is mainly the upper half of the port of the heat exchange coil 91. The lower half can be welded after removing the heat exchange coil 91 and the liquid inlet pipe 92.

[0029] After the welding of the heat exchange coil 91 and the liquid inlet pipe 92 is completed, the liquid outlet pipe 93 is removed, and the welded heat exchange coil 91 is flipped upside down and placed on the fixture. Then the liquid outlet pipe 93 is installed in the original position of the liquid inlet pipe 92. The liquid outlet pipe 93 and the liquid inlet pipe 92 are positioned by the liquid inlet pipe 92, that is, the positions of the liquid outlet pipe 93 and the liquid inlet pipe 92 are interchanged. Then the welding of the liquid outlet pipe 93 and the heat exchange coil 91 can be achieved in the above manner.

[0030] The embodiments described above are illustrative of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be as set forth in the claims.

Claims

1. An auxiliary welding fixture for a floating coil in a semi-instantaneous heat exchanger, comprising a circular base (1), wherein a cylindrical central positioning post (2) is formed in the middle of the base (1), characterized in that: The central positioning post (2) has vertical right positioning slot (21) and left positioning slot (22) formed on the opposite side walls. Several vertical left positioning baffles (4) and right positioning baffles (3) are fixed on the base (1) on the left and right sides of the central positioning post (2). The left positioning baffle (4) and right positioning baffle (3) are formed on one side of the left positioning baffle (4) and right positioning baffle (3). A horizontal right support rod (5) is inserted and fixed on the right positioning baffle (3) below the right support slot (31). The left end of the right support rod (5) is inserted and fixed on the central positioning post (2), and the right end extends out of the right positioning baffle (3) and is formed with a screw rod (51) with a D-shaped cross section. The screw rod (51) is fitted with a vertical clamping plate (6), and a nut (7) is screwed onto the screw rod (51) on the right side of the clamping plate (6). A horizontal longitudinal rear support rod (8) is inserted and fixed on the rear side wall of the central positioning post (2), and the rear support rod (8) is located on the upper side of the right support rod (5).

2. The auxiliary welding fixture for the floating coil in a semi-instantaneous heat exchanger according to claim 1, characterized in that: The auxiliary welding fixture is equipped with a floating coil (9), which consists of several spiral heat exchange coils (91) and liquid inlet pipes (92) and liquid outlet pipes (93) located at both ends of the heat exchange coils (91). The inlet pipe (92) is placed in the right support slot (31) of the right positioning baffle (3), with one end of the inlet pipe (92) near the center positioning post (2) inserted into the right positioning slot (21) of the center positioning post (2) and the other end abutting against the clamping plate (6); the outlet pipe (93) is placed in the left support slot (41) of the left positioning baffle (4), with the end of the outlet pipe (93) inserted into the left positioning slot (41) of the center positioning post (2). Inside the slot (22), the heat exchange coil (91) is fitted on the outside of the central positioning post (2). The outer wall of the side wall of the heat exchange coil (91) abuts against the outer wall of the left positioning baffle (4) and the right positioning baffle (3) or the outer wall of the central positioning post (2). The lower outer wall of the heat exchange coil (91) abuts against the right support rod (5) and the rear support rod (8). The two ends of the heat exchange coil (91) abut against the liquid inlet pipe (92) and the liquid outlet pipe (93) respectively.

3. The auxiliary welding fixture for the floating coil in a semi-instantaneous heat exchanger according to claim 2, characterized in that: The central axis of the left positioning baffle (4), the central axis of the right positioning baffle (3), and the central axis of the central positioning column (2) coincide.

4. The auxiliary welding fixture for the floating coil in a semi-instantaneous heat exchanger according to claim 2, characterized in that: The slot of the left support groove (41) on the left positioning baffle (4) faces the end of the heat exchange coil (91), and the slot of the right support groove (31) on the right positioning baffle (3) faces the end of the heat exchange coil (91).

5. The auxiliary welding fixture for the floating coil in a semi-instantaneous heat exchanger according to claim 2, characterized in that: The bottom surface of the left support groove (41) on the left positioning baffle (4) is located below the bottom surface of the right support groove (31) on the right positioning baffle (3).

6. The auxiliary welding fixture for the floating coil in a semi-instantaneous heat exchanger according to claim 2, characterized in that: The width and depth of the right positioning slot (21) on the central positioning column (2) are equal to the width and depth of the left positioning slot (22), and the width of the left positioning slot (22) is equal to the outer diameter of the liquid outlet connector (93).

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