Sealing tool and system for gap between tube pass and shell pass of heat exchanger

Abstract

The utility model provides a sealing tool and system for a gap between a tube pass and a shell pass of a heat exchanger, and the sealing tool for the gap between the tube pass and the shell pass of the heat exchanger comprises a check ring, an elastic sealing ring and a pressing ring, the check ring, the elastic sealing ring and the pressing ring are all arranged outside a tube pass connecting pipe of the heat exchanger in a sleeving mode, and the elastic sealing ring is located in a shell pass connecting pipe of the heat exchanger and located between the check ring and the pressing ring in the axis direction of the tube pass connecting pipe. The two sides, in the axis direction of the tube pass connecting tube, of the elastic sealing ring can be squeezed by the check ring and the pressing ring at the same time. The utility model further discloses a sealing system for the tube pass and shell pass gap of the heat exchanger. The sealing system comprises the heat exchanger and the sealing tool for the tube pass and shell pass gap of the heat exchanger. The heat exchanger does not loosen due to flowing and temperature difference of media in the heat exchanger, and is more durable.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a sealing tool and a system for the gap between the tube and shell sides of a heat exchanger. Background Art

[0002] In existing heat exchangers, the shell-side pipe is mostly sleeved on the outside of the tube-side pipe. Since the inner diameter of the shell-side pipe is larger than the outer diameter of the tube-side pipe, in order to eliminate the annular gap between the shell-side pipe and the tube-side pipe, the shell-side pipe and the tube-side pipe are usually installed together by loose compression or wedge compression. However, when the heat exchanger is running, the flow and temperature difference of the medium in the heat exchanger will cause the seal between the shell-side pipe and the tube-side pipe to loosen, thereby causing the interior of the shell-side pipe to communicate with the interior of the tube-side pipe, making the heat exchanger unable to operate normally. Utility Model Content

[0003] In response to the technical problems raised above, a sealing device and system for the gap between the tube and shell of a heat exchanger is provided. This device will not loosen due to the flow of the medium and temperature differences in the heat exchanger, and is more durable. The technical means adopted by this device are as follows:

[0004] In a first aspect, a sealing tool is provided for the gap between the tube side and shell side of a heat exchanger, comprising a retaining ring, an elastic sealing ring and a pressure ring; the retaining ring, the elastic sealing ring and the pressure ring are all sleeved on the outside of the tube side pipe of the heat exchanger, the elastic sealing ring is located inside the shell side pipe of the heat exchanger, the elastic sealing ring is located between the retaining ring and the pressure ring in the axial direction of the tube side pipe, and the two sides of the elastic sealing ring along the axial direction of the tube side pipe can be squeezed simultaneously by the retaining ring and the pressure ring; when the two sides of the elastic sealing ring along the axial direction of the tube side pipe are squeezed simultaneously by the retaining ring and the pressure ring, the inner side wall and the outer side wall of the elastic sealing ring can respectively squeeze the outer side wall of the tube side pipe and the inner side wall of the shell side pipe simultaneously.

[0005] Furthermore, it also includes an external thread arranged on the outer wall of the pipe-side pipe, and an internal thread is arranged on the inner wall of the clamping ring, and the external thread and the internal thread cooperate with each other; the retaining ring is fixedly installed on one end of the external thread close to the tube sheet connection end of the pipe-side pipe.

[0006] Furthermore, a plurality of bayonet grooves are evenly distributed along the circumferential direction of the compression ring on one side away from the elastic sealing ring.

[0007] Furthermore, it also includes a packing pressure ring; the packing pressure ring is sleeved on the outside of the tube-side pipe of the heat exchanger, and the packing pressure ring is located between the clamping ring and the elastic sealing ring in the axial direction of the tube-side pipe, and the side of the packing pressure ring close to the clamping ring is smooth.

[0008] In a second aspect, a sealing system for the tube-side and shell-side gaps of a heat exchanger includes a heat exchanger, wherein the heat exchanger includes a tube sheet, a tube-side pipe and a shell-side pipe, one end of the tube-side pipe is a tube sheet connection end that can be connected to the tube sheet, and the shell-side pipe is sleeved outside the tube-side pipe. The system also includes the sealing tool for the tube-side and shell-side gaps of the heat exchanger described in any one of the first aspects, the retaining ring, elastic sealing ring and pressure ring in the sealing tool for the tube-side and shell-side gaps of the heat exchanger are all sleeved outside the tube-side pipe, and the elastic sealing ring in the sealing tool for the tube-side and shell-side gaps of the heat exchanger is located in the shell-side pipe. When the two sides of the elastic sealing ring in the sealing tool for the tube-side and shell-side gaps of the heat exchanger along the axial direction of the tube-side pipe are respectively squeezed simultaneously by the retaining ring and the pressure ring, the inner side wall and outer side wall of the elastic sealing ring in the sealing tool for the tube-side and shell-side gaps of the heat exchanger can respectively squeeze the outer side wall of the tube-side pipe and the inner side wall of the shell-side pipe simultaneously.

[0009] The utility model has the following advantages:

[0010] 1. In the present invention, by adjusting the positions of the retaining ring and the pressing ring, the retaining ring and the pressing ring respectively squeeze the two sides of the elastic sealing ring along the axial direction of the tube-side pipe, causing the elastic sealing ring to deform, thereby achieving the inner side wall and outer side wall of the elastic sealing ring to squeeze the outer side wall of the tube-side pipe and the inner side wall of the shell-side pipe at the same time. When the annular gap between the shell-side pipe and the tube-side pipe is deformed due to the flow and temperature difference of the medium in the heat exchanger, the elastic sealing ring will also deform to adapt to the annular gap between the shell-side pipe and the tube-side pipe, so that the sealing tooling for the tube-side and shell-side gap of the heat exchanger provided by the present invention will not loosen due to the flow and temperature difference of the medium in the heat exchanger, and is more durable.

[0011] 2. In the present invention, the clamping ring can move along the length direction of the pipe through the internal thread matching the external thread, thereby adjusting the distance between the clamping ring and the retaining ring, so that the clamping ring and the retaining ring can clamp or loosen the elastic sealing ring.

[0012] 3. In the present invention, when the clamping ring needs to be tightened, the staff can insert the wrench into the bayonet slot to fix the position, and then turn the wrench to tighten the clamping ring.

[0013] 4. In the present invention, a packing ring is provided between the compression ring and the elastic sealing ring, and the side of the packing ring close to the compression ring is smooth. When the compression ring rotates, the packing ring does not rotate therewith, thereby preventing the elastic sealing ring from being circumferentially deformed due to the rotation of the compression ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 This is an overall structural diagram of a sealing tool for the gap between the tube and shell sides of a heat exchanger according to Example 1 of the present invention;

[0016] Figure 2 This is an overall structural diagram of a sealing system for a gap between the tube and shell sides of a heat exchanger according to embodiment 2 of the present invention, when the elastic sealing ring is in a compressed state;

[0017] Reference numerals: 1-pressure ring; 2-packing pressure ring; 3-elastic sealing ring; 4-retaining ring; 5-bayonet groove. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example 1:

[0020] like Figure 1 As shown, a sealing tool for the gap between the tube and shell of a heat exchanger includes a retaining ring 4, an elastic sealing ring 3 and a clamping ring 1; the retaining ring 4, the elastic sealing ring 3 and the clamping ring 1 are all sleeved on the outside of the tube-side pipe of the heat exchanger, the elastic sealing ring 3 is located in the shell-side pipe of the heat exchanger, and the elastic sealing ring 3 is located between the retaining ring 4 and the clamping ring 1 in the axial direction of the tube-side pipe. The two sides of the elastic sealing ring 3 along the axial direction of the tube-side pipe can be squeezed simultaneously by the retaining ring 4 and the clamping ring 1 respectively; when the two sides of the elastic sealing ring 3 along the axial direction of the tube-side pipe are squeezed simultaneously by the retaining ring 4 and the clamping ring 1 respectively, the inner side wall and the outer side wall of the elastic sealing ring 3 can respectively squeeze the outer side wall of the tube-side pipe and the inner side wall of the shell-side pipe simultaneously.

[0021] By adjusting the positions of the retaining ring 4 and the clamping ring 1, the retaining ring 4 and the clamping ring 1 respectively squeeze the two sides of the elastic sealing ring 3 along the axial direction of the tube-side pipe, causing the elastic sealing ring 3 to deform, thereby achieving the inner and outer walls of the elastic sealing ring 3 to squeeze the outer wall of the tube-side pipe and the inner wall of the shell-side pipe at the same time. When the annular gap between the shell-side pipe and the tube-side pipe is deformed due to the flow and temperature difference of the medium in the heat exchanger, the elastic sealing ring 3 will also be deformed to adapt to the annular gap between the shell-side pipe and the tube-side pipe, so that the sealing tooling used for the tube-side and shell-side gap of the heat exchanger provided in this embodiment will not loosen due to the flow and temperature difference of the medium in the heat exchanger, and will be more durable.

[0022] In this embodiment, an external thread is provided on the outer side wall of the pipe-side pipe, and an internal thread is provided on the inner side wall of the clamping ring 1, and the external thread and the internal thread cooperate with each other; the retaining ring 4 is fixedly installed on one end of the external thread close to the tube sheet connection end of the pipe-side pipe.

[0023] Specifically, the inner wall of the retaining ring 4 is welded to the outer wall of the pipe-side connecting pipe.

[0024] The clamping ring 1 can move along the length direction of the pipe through the internal thread matching the external thread, thereby adjusting the distance between the clamping ring 1 and the retaining ring 4, so that the clamping ring 1 and the retaining ring 4 can clamp or loosen the elastic sealing ring 3.

[0025] In this embodiment, a plurality of bayonet grooves 5 are evenly distributed along the circumferential direction of the compression ring 1 on one side away from the elastic sealing ring 3 .

[0026] Specifically, the bayonet grooves 5 are evenly distributed along the circumferential direction of the elastic sealing ring 3 and are provided in six numbers.

[0027] When the clamping ring 1 needs to be tightened, the staff can insert the wrench into the bayonet slot 5 to fix the position, and then turn the wrench to tighten the clamping ring 1.

[0028] In this embodiment, a packing pressure ring 2 is further included; the packing pressure ring 2 is sleeved on the outside of the tube-side pipe of the heat exchanger, and the packing pressure ring 2 is located between the clamping ring 1 and the elastic sealing ring 3 in the axial direction of the tube-side pipe, and the side of the packing pressure ring 2 close to the clamping ring 1 is smooth.

[0029] By arranging a packing ring 2 between the clamping ring 1 and the elastic sealing ring 3, and the side of the packing ring 2 close to the clamping ring 1 is smooth, when the clamping ring 1 rotates, the packing ring 2 will not rotate therewith, and the elastic sealing ring 3 will not undergo circumferential deformation due to the rotation of the clamping ring 1.

[0030] Example 2

[0031] like Figure 2 As shown, a sealing system for the tube-side and shell-side gaps of a heat exchanger includes a heat exchanger, wherein the heat exchanger includes a tube sheet, a tube-side pipe and a shell-side pipe, one end of the tube-side pipe is a tube sheet connecting end that can be connected to the tube sheet, and the shell-side pipe is sleeved outside the tube-side pipe. The system also includes the sealing tool for the tube-side and shell-side gaps of the heat exchanger described in any one of Example 1, wherein the retaining ring 4, the elastic sealing ring 3 and the pressure ring 1 in the sealing tool for the tube-side and shell-side gaps of the heat exchanger are all sleeved outside the tube-side pipe, and the elastic sealing ring 3 in the sealing tool for the tube-side and shell-side gaps of the heat exchanger is located in the shell-side pipe. When the two sides of the elastic sealing ring 3 in the sealing tool for the tube-side and shell-side gaps of the heat exchanger along the axial direction of the tube-side pipe are respectively squeezed simultaneously by the retaining ring 4 and the pressure ring 1, the inner side wall and the outer side wall of the elastic sealing ring 3 in the sealing tool for the tube-side and shell-side gaps of the heat exchanger can respectively squeeze the outer side wall of the tube-side pipe and the inner side wall of the shell-side pipe simultaneously.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing tool for the gap between the tube and shell of a heat exchanger, characterized in that: It comprises a retaining ring (4), an elastic sealing ring (3) and a pressing ring (1); The retaining ring (4), the elastic sealing ring (3) and the pressing ring (1) are all sleeved on the outside of the tube-side pipe of the heat exchanger; the elastic sealing ring (3) is located in the shell-side pipe of the heat exchanger; the elastic sealing ring (3) is located between the retaining ring (4) and the pressing ring (1) in the axial direction of the tube-side pipe; the two sides of the elastic sealing ring (3) along the axial direction of the tube-side pipe can be squeezed simultaneously by the retaining ring (4) and the pressing ring (1); When the two sides of the elastic sealing ring (3) along the axial direction of the tube-side pipe are simultaneously squeezed by the retaining ring (4) and the pressing ring (1), the inner side wall and the outer side wall of the elastic sealing ring (3) can simultaneously squeeze the outer side wall of the tube-side pipe and the inner side wall of the shell-side pipe respectively.

2. A sealing tool for the gap between the tube and shell of a heat exchanger according to claim 1, characterized in that: It also includes an external thread provided on the outer side wall of the pipe-side pipe, and an internal thread provided on the inner side wall of the clamping ring (1), wherein the external thread and the internal thread cooperate with each other; The retaining ring (4) is fixedly mounted on one end of the external thread close to the tube sheet connection end of the tube side pipe.

3. The sealing tool for the gap between the tube and shell of a heat exchanger according to claim 1, characterized in that: A plurality of bayonet grooves (5) are evenly distributed along the circumferential direction of the compression ring (1) on one side away from the elastic sealing ring (3).

4. The sealing tool for the gap between the tube and shell of a heat exchanger according to claim 1, characterized in that: Also includes a packing press ring (2); The packing pressure ring (2) is sleeved on the outside of the tube-side pipe of the heat exchanger. The packing pressure ring (2) is located between the pressure ring (1) and the elastic sealing ring (3) in the axial direction of the tube-side pipe. The side of the packing pressure ring (2) close to the pressure ring (1) is smooth.

5. A sealing system for the gap between the tube side and shell side of a heat exchanger, comprising a heat exchanger, wherein the heat exchanger comprises a tube sheet, a tube side nozzle, and a shell side nozzle, wherein one end of the tube side nozzle is a tube sheet connection end connectable to the tube sheet, and the shell side nozzle is sleeved outside the tube side nozzle, characterized in that: It also includes a sealing tool for the tube-side and shell-side gap of a heat exchanger as described in any one of claims 1 to 4, wherein the retaining ring (4), the elastic sealing ring (3) and the pressing ring (1) in the sealing tool for the tube-side and shell-side gap of the heat exchanger are all sleeved on the outside of the tube-side pipe, and the elastic sealing ring (3) in the sealing tool for the tube-side and shell-side gap of the heat exchanger is located in the shell-side pipe. When the two sides of the elastic sealing ring (3) in the sealing tool for the tube-side and shell-side gap of the heat exchanger along the axial direction of the tube-side pipe are squeezed by the retaining ring (4) and the pressing ring (1) at the same time, the inner side wall and the outer side wall of the elastic sealing ring (3) in the sealing tool for the tube-side and shell-side gap of the heat exchanger can respectively squeeze the outer side wall of the tube-side pipe and the inner side wall of the shell-side pipe at the same time.

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