Steel pipe box and flat cover integrated structure

Abstract

The utility model discloses an integrated structure of a flat cover of a steel pipe box, which reduces connecting parts through the integrated structure, reduces potential leakage points and enhances pressure resistance and corrosion resistance. The heat exchanger comprises a tube box, the tube box comprises a tube box inner end face, a tube box outer end face and a tube box outer ring circumference, a concave confluence cavity is formed in the center area of the tube box inner end face, a stop protruding ring is arranged on the radial outer ring face of the tube box inner end face, and a first guide hole penetrating in the thickness direction is formed in the position, corresponding to a confluence channel, of the tube box outer end face; the inner end of the first guide hole is communicated to the confluence cavity, and a plurality of pull rod mounting threaded blind holes are annularly distributed in the outer end face, corresponding to the radial peripheral part, of the tube box; the flat cover comprises a flat cover inner end face, a flat cover outer end face and a flat cover outer circumference, the diameter of the flat cover is larger than that of the tube box, and a plurality of outer ring mounting through holes which are annularly distributed are formed in the outer ring part, larger than the tube box, of the flat cover.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat exchanger structure, specifically is a tube box flat cover integration structure. BACKGROUND

[0002] In the traditional heat exchanger design, the tube box and the flat cover are usually designed separately and connected through flanges or welding. This connection method is prone to leakage due to thermal expansion and contraction and pressure fluctuations, increasing maintenance difficulty and cost. In particular, in a highly corrosive application environment, the sealing and durability of the tube box and the flat cover are more critical. There is still a lack of a structure that integrates the stainless steel tube box and the flat cover to improve the overall sealing performance, pressure resistance, and corrosion resistance in the prior art. SUMMARY

[0003] To solve the above problems, the utility model provides a tube box flat cover integration structure, which reduces the connecting components, reduces the potential leakage points, and enhances the pressure resistance and corrosion resistance through the integration structure.

[0004] A tube box flat cover integration structure, characterized in that it comprises:

[0005] a tube box, which includes a tube box inner end face, a tube box outer end face, and a tube box outer ring circumference, a concave convergence cavity in the central area of the tube box inner end face, a stop protrusion ring provided on the radial outer ring surface of the tube box inner end face, a first guide hole with a thickness direction penetrating the position corresponding to the convergence passage of the tube box outer end face, the inner end of the first guide hole being connected to the convergence cavity, and a plurality of pull rod mounting threaded blind holes being arranged around the radial periphery part of the tube box outer end face;

[0006] and a flat cover, which includes a flat cover inner end face, a flat cover outer end face, and a flat cover outer ring circumference, the diameter of the flat cover being greater than that of the tube box, a plurality of ring-arranged outer ring mounting through holes being provided on the outer ring part of the flat cover larger than the tube box, the outer ring through mounting hole being used for screwing and connecting the corresponding position screw hole of the tube plate through stud fastening, a pull rod connecting hole being provided at the position corresponding to each pull rod mounting threaded blind hole of the flat cover, the pull rod connecting hole being arranged in the thickness direction of the flat cover, and a second guide hole being provided at the position corresponding to the first guide hole of the flat cover;

[0007] the flat cover being fastened to the tube box through the pull rod, the tube box outer end face being arranged in close contact with the flat cover inner end face, and the outer ring mounting through hole being arranged at the radial outer position of the tube box outer ring circumference.

[0008] Further characterized in that:

[0009] The diameter of the second guide hole is larger than that of the first guide hole, and the outer end surface of the tube box is provided with an outer convex guide ring at a position corresponding to the first guide hole, and the outer convex guide ring is inserted into the inner end of the second guide hole and is fastened and connected in the assembled state;

[0010] The second guide hole is a threaded hole, a guide sleeve is threadedly connected to the second guide hole, and the thickness of the guide sleeve is equal to the thickness of the outer convex guide ring, so that the inflow pipe can be reliably placed along the guide sleeve and the first guide hole without being blocked by the convex stopper.

[0011] One of the threaded blind holes of the pull rod is arranged through an auxiliary block, the outer end surface of the tube box is provided with an inner groove at a position corresponding to the auxiliary block, the inner end of the auxiliary block is embedded in the inner groove and is welded and connected, the outer end of the auxiliary block is convex to the outer end surface of the tube box, the inner end surface of the flat cover is provided with a profiled inner groove corresponding to the outer end of the auxiliary block, and the auxiliary block is integrated with corresponding connecting holes and threaded blind holes, and the tube box and the flat cover are reliably fixed and connected through the connecting holes and the threaded blind holes of the pull rod.

[0012] The arrangement of the auxiliary block and the outer convex guide ring structure enables quick alignment of the tube box and the flat cover, and facilitates reliable radial alignment.

[0013] The flow collecting cavity is composed of two inclined flow collecting surfaces, which enables the flow channel inside the tube box to be designed in a V shape, optimizes fluid flow, and reduces pressure drop.

[0014] After the structure of the utility model is adopted, the tube box and the flat cover are assembled into an integral piece through the pull rod in advance, the outer end surface of the tube plate is provided with an inner recessed ring groove at a position corresponding to the stopper convex ring, the stopper convex ring is inserted into the inner recessed ring groove after a gasket is mounted, and then the outer ring penetrating mounting hole and the screw rod connecting hole at the corresponding position of the tube plate are reliably fixed and connected through the stud and the nut to complete the assembly, the tube box and the flat cover are integrally forged and formed and are both made of stainless steel thick material, which reduces the connecting components through the integrated structure, reduces potential leakage points, and enhances the pressure resistance and corrosion resistance. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view of the sectional structure of the utility model;

[0016] Figure 2 It is a front view of the sectional structure of the utility model; Figure 1

[0017] Figure 3 It is a perspective view of the tube box of the utility model;

[0018] Figure 4 It is an assembly sectional view of the integrated structure and the tube plate of the utility model; ​

[0019] The names corresponding to the numbers in the figure are as follows:

[0020] Tube box 10, tube box inner end face 11, tube box outer end face 12, tube box outer circumferential 13, converging cavity 14, inclined converging face 141, stop protruding ring 15, first guide hole 16, pull rod mounting threaded blind hole 17, outer convex guide ring 18, inner recess 19, flat cover 20, flat cover inner end face 21, flat cover outer end face 22, flat cover outer circumferential 23, outer ring mounting through hole 24, pull rod connecting hole 25, second guide hole 26, profiled inner recess 27, converging passage 30, stud 40, nut 41, tube plate 50, screw rod connecting hole 51, inner recess ring groove 52, pull rod 60, guide sleeve 70, gasket 80, inflow pipe 90, auxiliary block 100, connecting hole 101, threaded blind hole 102. DETAILED DESCRIPTION

[0021] A tube box flat cover integrated structure, see Figures 1-3 , which comprises a tube box 10 and a flat cover 20.

[0022] The tube box 10 comprises a tube box inner end face 11, a tube box outer end face 12, and a tube box outer circumferential 13, a converging cavity 14 recessed in the central area of the tube box inner end face 11, a stop protruding ring 15 provided on the radially outer circumferential surface of the tube box inner end face 11, a first guide hole 16 provided with a thickness direction through hole on the tube box outer end face 12 corresponding to the position of the converging passage 30, the inner end of the first guide hole 16 communicating with the converging cavity 14, and a plurality of pull rod mounting threaded blind holes 17 arranged in a ring around the radially peripheral part of the tube box outer end face 12.

[0023] The flat cover 20 comprises a flat cover inner end face 21, a flat cover outer end face 22, and a flat cover outer circumferential 23, the diameter of the flat cover 20 is greater than the diameter of the tube box 10, the outer circumferential part of the flat cover 20 larger than the tube box 10 is provided with a plurality of ring arranged outer ring mounting through holes 24, the outer ring through mounting hole 24 is used to fixedly connect the corresponding screw rod connecting hole 51 of the tube plate 50 through the stud 40, the flat cover 20 is provided with a pull rod connecting hole 25 corresponding to the position of each pull rod mounting threaded blind hole 17, the pull rod connecting hole 25 is arranged through the thickness direction of the flat cover 20, and the flat cover 20 is provided with a second guide hole 26 corresponding to the position of the first guide hole 16.

[0024] The flat cover 20 is fixedly connected with the tube box 10 through the pull rod 60, the tube box outer end face 12 is arranged in close contact with the flat cover inner end face 21, and the outer ring mounting through hole 24 is arranged at the radially outer position of the tube box outer circumferential 13.

[0025] In specific implementation, the diameter of the second guide hole 26 is greater than that of the first guide hole 17, the tube box outer end face 12 is provided with an outer convex guide ring 18 corresponding to the position of the first guide hole 17, and the outer convex guide ring 18 is inserted and mounted at the inner end of the second guide hole 26 in the assembled state and is tightly connected.

[0026] The second guide hole 26 is a threaded hole, and the guide sleeve 70 is threadedly connected to the second guide hole 26. The thickness of the guide sleeve 70 is equal to the thickness of the outer convex guide ring 18, ensuring that the inlet pipe 90 can be reliably placed along the guide sleeve 70 and the first guide hole 17 without being blocked by the raised stop edge.

[0027] During specific implementation, one of the tie rod mounting threaded blind holes 17 is installed and arranged through the auxiliary block 100. The outer end surface 12 of the pipe box is provided with an inner groove 19 corresponding to the position of the auxiliary block 100. The inner end of the auxiliary block 100 is embedded in the inner groove 19 and welded. The outer end of the auxiliary block 100 protrudes from the outer end surface 12 of the pipe box. The inner end surface 21 of the flat cover is provided with a contoured inner groove 27 corresponding to the outer end of the auxiliary block 100. The auxiliary block 100 is integrated with corresponding connecting holes 101 and threaded blind holes 102. The tie rod 60 securely connects the pipe box 10 and the flat cover 20 through the connecting holes 101 and the threaded blind holes 102.

[0028] The arrangement of the auxiliary block 100 and the externally protruding guide ring 18 allows the pipe box 10 and the flat cover 20 to be quickly aligned, making radial alignment reliable and convenient.

[0029] The confluence chamber 14 is assembled from two inclined confluence surfaces 141 , which makes the flow channel inside the pipe box 10 designed to be V-shaped, thereby optimizing fluid flow and reducing pressure drop.

[0030] The assembly process is as follows: the pipe box 10 and the flat cover 20 are assembled into an integral part in advance by the pull rod 60. The outer end surface of the tube plate 50 is provided with an inner concave ring groove 52 corresponding to the position of the stop protrusion ring 15. The stop protrusion ring 15 is installed with a gasket 80 and then plugged into the inner concave ring groove 52. Then, the outer ring is passed through the mounting hole 24 and the screw connection hole 51 at the corresponding position of the tube plate 50 by the stud 40 and the nut 41 to complete the assembly. The pipe box 10 and the flat cover 20 are formed by integral forging and are both made of thick stainless steel. The integrated structure reduces connecting parts, reduces potential leakage points, and enhances pressure resistance and corrosion resistance.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0032] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. A steel pipe box flat cover integrated structure, characterized in that: It includes: A pipe box, comprising an inner end face, an outer end face, and an outer circumference of the pipe box; a concave confluence cavity in the central region of the inner end face; a stopper protrusion ring provided on the radially outer circumference of the inner end face; a first guide hole penetrating in the thickness direction of the outer end face corresponding to the confluence channel; an inner end of the first guide hole communicates with the confluence cavity; and a plurality of threaded blind holes for tie rod mounting are arranged on the outer end face of the pipe box corresponding to the radial outer portion. and a flat cover, comprising an inner end surface, an outer end surface, and an outer circumference of the flat cover, wherein the diameter of the flat cover is greater than the diameter of the pipe box, and a plurality of outer ring mounting through holes are provided on the outer ring portion of the flat cover that is larger than the pipe box, wherein the outer ring mounting through holes are used to fix the corresponding screw connection holes of the pipe plate through studs, and tie rod connection holes are provided at positions of the flat cover corresponding to each tie rod mounting threaded blind hole, wherein the tie rod connection holes are arranged throughout the thickness direction of the flat cover, and a second guide hole is provided at a position of the flat cover corresponding to the first guide hole; The flat cover is fixedly connected to the pipe box via a pull rod. The outer end surface of the pipe box is arranged closely against the inner end surface of the flat cover. The outer ring mounting through hole is arranged at a radially outer position of the outer circumference of the pipe box.

2. The steel pipe box flat cover integrated structure according to claim 1, characterized in that: The diameter of the second guide hole is larger than that of the first guide hole. An outwardly protruding guide ring is provided at the position of the outer end surface of the pipe box corresponding to the first guide hole. In the assembled state, the outwardly protruding guide ring is inserted into the inner end of the second guide hole and is tightly connected.

3. The steel pipe box flat cover integrated structure according to claim 2, characterized in that: The second guide hole is a threaded hole, the guide sleeve is threadedly connected to the second guide hole, and the thickness of the guide sleeve is equal to the thickness of the outer convex guide ring.

4. The steel pipe box flat cover integrated structure according to claim 1, characterized in that: One of the pull rod mounting threaded blind holes is installed and arranged through the auxiliary block, and an inner groove is provided on the outer end face of the pipe box corresponding to the position of the auxiliary block. The inner end of the auxiliary block is embedded in the inner groove and welded together, and the outer end of the auxiliary block protrudes outward from the outer end face of the pipe box, and a contoured inner groove is provided on the inner end face of the flat cover corresponding to the outer end of the auxiliary block. Corresponding connecting holes and threaded blind holes are integrated on the auxiliary block, and the pull rod reliably fixes the pipe box and the flat cover through the connecting holes and threaded blind holes.

5. The steel pipe box flat cover integrated structure according to claim 1, characterized in that: The confluence cavity is composed of two inclined confluence surfaces assembled together.

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