Hot tightening device

Abstract

The utility model provides a hot tightening device which comprises a heating sleeve and a locking piece. The heating sleeve comprises a sleeve body and a heating piece. A heating space used for containing the flange plate assembly is formed in the sleeve body. The heating piece is arranged in the sleeve body, electrically connected with an external power source and used for heating the flange plate assembly and the bolt arranged on the flange plate assembly in a penetrating mode. The locking piece is provided with a through hole matched with the bolt, so that the locking piece can be arranged on the periphery of the bolt in a sleeving mode and is used for rotating the heated bolt. According to the hot tightening device, the sleeve body is arranged on the flange plate assembly in the sleeving mode, the flange plate assembly is contained in the heating space, the flange plate assembly and the bolt are heated through the heating piece arranged in the sleeve body, the flange plate assembly and the bolt can be heated evenly, and the heating effect is good; and then the heated bolt is rotated and tightened through the locking piece, so that the hot tightening operation of the bolt is conveniently realized.

Description

Technical Field

[0001] The utility model relates to the technical field of energy equipment, in particular to a thermal tightening device. Background Art

[0002] All materials will expand and contract with heat. When the material of the flange is different from that of the bolt, the different expansion coefficients will cause the tightening state to change and become loose, and the sealing surface will be leaking. When transporting or storing thermal energy products or pipelines, the tightening torque will relax due to the increase in temperature during operation. In order to ensure the normal operation of the product, the flange needs to be thermally tightened.

[0003] The main heat tightening methods currently used are: using a flame spray gun or adding a protective device for heating, which is mainly used for heating large components such as turbine cylinder bolts. This method may cause certain damage to the bolts, and this method requires the generation of open flames, which cannot be used in production environments with high requirements or in some occasions. In addition, each bolt needs to be heated separately, which is easy to cause uneven heating, is greatly affected by human factors, and has extremely low operating efficiency. Utility Model Content

[0004] The utility model aims to provide a thermal tightening device, which can make the bolts on the flange assembly be heated evenly, is simple to operate, easy to use and has high versatility.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] According to one aspect of the present application, the present application provides a thermal tightening device, comprising:

[0007] A heating sleeve, comprising a sleeve body and a heating element, wherein the sleeve body is formed with a heating space for accommodating a flange assembly; the heating element is arranged inside the sleeve body, and the heating element is electrically connected to an external power source, and is used to heat the flange assembly and bolts passing through the flange assembly;

[0008] The locking piece has a through hole matched with the bolt, so that the locking piece can be sleeved on the outer periphery of the bolt and used to rotate the heated bolt.

[0009] In some embodiments, the sleeve includes an inner protective layer, a thermal insulation layer and an outer protective layer arranged in sequence from the inside to the outside, and the heating element is arranged between the inner protective layer and the thermal insulation layer.

[0010] In some embodiments, the heating sleeve further comprises protective bodies arranged at two axial ends of the sleeve body, the two protective bodies and the sleeve body together enclose the heating space; and a through hole communicating with the heating space is formed on the protective body.

[0011] In some embodiments, the heating sleeve further includes a protective body disposed at one axial end of the sleeve body, and the protective body and the sleeve body together enclose the heating space.

[0012] In some embodiments, the protective body includes a heat insulation layer and a protective layer wrapped around the heat insulation layer.

[0013] In some embodiments, the protective body includes a plurality of protective parts, each of which is detachably connected to the sleeve body, and ends of any two adjacent protective parts are fitted or detachably connected;

[0014] Each of the protection parts is fan-shaped.

[0015] In some embodiments, there are multiple heating elements, and the multiple heating elements are arranged inside the sleeve at intervals.

[0016] In some embodiments, the heating sleeve further comprises a connecting assembly disposed on the sleeve body, and the connecting assembly is used to achieve a detachable connection between the heating sleeve and the flange.

[0017] In some embodiments, the connection assembly includes a first connection member and a second connection member that are detachably connected;

[0018] The sleeve body is provided with a gap, the gap extends along the axial direction of the sleeve body, and opposite ends of the gap extend to the axial ends of the sleeve body respectively;

[0019] The sleeve has two states, open and closed. When the sleeve is in the open state, the first connecting member and the second connecting member are respectively located at opposite ends of the gap on the sleeve; when the sleeve is in the closed state, the first connecting member is connected to the second connecting member so that the opposite ends of the sleeve are connected and fixed.

[0020] In some embodiments, the sleeve is made of flexible material;

[0021] The sleeve has two states: flattened and curled. When the sleeve is in the flattened state, the first connecting member and the second connecting member are respectively located at opposite ends of the sleeve to open the sleeve; when the sleeve is in the curled state, the first connecting member is connected to the second connecting member to connect and fix the opposite ends of the sleeve to be closed.

[0022] In some embodiments, the thermal tightening device includes a controller and a temperature sensor, the controller is electrically connected to the external power supply, and the heating element is electrically connected to the controller;

[0023] The temperature sensor is connected to the flange assembly or the bolt and is used to detect the temperature signal of the flange assembly or the bolt; the temperature sensor is electrically connected to the controller.

[0024] It can be seen from the above technical solution that the utility model has at least the following advantages and positive effects:

[0025] In the utility model, the heat tightening device includes a heating sleeve and a locking member. The heating sleeve includes a sleeve body and a heating member. The sleeve body is formed with a heating space for accommodating the flange assembly. The heating member is arranged inside the sleeve body, and the heating member is electrically connected to an external power source, and is used to heat the flange assembly and the bolts penetrated on the flange assembly. The locking member has a through hole matching the bolt, so that the locking member can be sleeved on the outer periphery of the bolt and used to rotate the heated bolt.

[0026] In the above-mentioned heat tightening device, the sleeve is sleeved on the flange assembly, so that the flange assembly is placed in the heating space, and the flange assembly and the bolts are heated by the heating element arranged inside the sleeve, so that the flange assembly and the bolts can be heated evenly and the heating effect is better. Then, the heated bolts are rotated and tightened by the locking element, which facilitates the heat tightening operation of the bolts and has high versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the heat tightening device in the first embodiment.

[0028] Figure 2 It is a cross-sectional view of the heating sleeve in one direction in the first embodiment.

[0029] Figure 3 It is a cross-sectional view of the heating sleeve in the first embodiment in another direction.

[0030] Figure 4 It is a schematic diagram of the structure of the protective body in the second embodiment.

[0031] Figure 5 It is a schematic diagram of the structure of the protective body in the third embodiment.

[0032] The following are the descriptions of the reference numerals:

[0033] 100, flange assembly; 200, bolts; 300, power supply;

[0034] 1. Heating sleeve; 11. Sleeve body; 111. Internal protective layer; 112. Insulation layer; 113. External protective layer; 12. Heating element; 13. Protective body; 131. Through hole; 132. Insulation layer; 133. Protective layer; 14. Connecting assembly;

[0035] 2. Heating sleeve; 21. Sleeve body; 22. Protective body; 221. Protective part; 23. Quick release part;

[0036] 3. Heating sleeve; 31. Sleeve body; 311. Inner protective layer; 312. Insulating layer; 313. Outer protective layer; 32. Heating element; 33. Protective body; 331. Insulating layer; 332. Protective layer;

[0037] 4. Controller;

[0038] 5. Temperature sensor; 51. Temperature measuring head; 52. Display. DETAILED DESCRIPTION

[0039] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0040] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indications of directions or positional relationships (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] The present application provides a thermal tightening device for heating a flange assembly and bolts passing through the flange assembly, and rotating and tightening the heated bolts.

[0043] The specific embodiments of the heat tightening device of the present application are described in detail below in conjunction with the accompanying drawings.

[0044] Embodiment 1

[0045] Figure 1 is a schematic diagram of the structure of the heat tightening device in Example 1, Figure 2 It is a cross-sectional view of the heating sleeve 1 in one direction in the first embodiment. Figure 3It is a cross-sectional view of the heating sleeve 1 in another direction in the first embodiment.

[0046] refer to Figure 1 to Figure 3 The heat tightening device includes a heating sleeve 1 and a locking member. The heating sleeve 1 includes a sleeve body 11 and a heating member 12. The sleeve body 11 is formed with a heating space for accommodating the flange assembly 100. The heating member 12 is arranged inside the sleeve body 11, and the heating member 12 is electrically connected to the external power supply 300, and is used to heat the flange assembly 100 and the bolt 200 penetrated on the flange assembly 100. The locking member has a through hole matching the bolt 200, so that the locking member can be sleeved on the outer periphery of the bolt 200, and is used to rotate the heated bolt 200. In the heat tightening device of this embodiment, the sleeve 11 is sleeved on the flange assembly 100, so that the flange assembly 100 is placed in the heating space, and the flange assembly 100 and the bolt 200 are heated by the heating element 12 arranged inside the sleeve 11, so that the flange assembly 100 and the bolt 200 can be heated evenly and the heating effect is better. Then, the heated bolt 200 is rotated and tightened by the locking element, which facilitates the heat tightening operation of the bolt 200 and has high versatility.

[0047] In this embodiment, the flange assembly 100 includes two flanges that fit together, and the two flanges are fastened together by bolts 200. The flange in this embodiment is particularly a flange with a diameter less than 600 mm.

[0048] refer to Figure 2 and Figure 3 In this embodiment, the heating sleeve 1 includes a sleeve body 11 and a heating element 12 .

[0049] The sleeve 11 is formed with a heating space for accommodating the flange assembly 100. When in use, the sleeve 11 is sleeved on the flange assembly 100 with its axis parallel to the axial direction of the flange assembly 100, and the two ends of the sleeve 11 along the axial direction thereof extend outwards beyond the two axial ends of the flange assembly 100 respectively.

[0050] A gap is provided on the sleeve body 11. The gap extends along the axial direction of the sleeve body 11, and opposite ends of the gap extend to the axial ends of the sleeve body 11 respectively.

[0051] The sleeve 11 has two states: open and closed. The gap on the sleeve 11 increases as the sleeve 11 is opened, or decreases as the sleeve 11 is closed. The sleeve 11 can be sleeved on the flange assembly 100 by increasing the gap.

[0052] Furthermore, the heating sleeve 1 further comprises a connecting assembly 14 arranged on the sleeve body 11 , and the connecting assembly 14 is used to realize a detachable connection between the heating sleeve 1 and the flange assembly 100 .

[0053] The connecting component 14 includes a first connecting member and a second connecting member, and the first connecting member and the second connecting member are detachably connected. When the sleeve 11 is in an open state, the first connecting member and the second connecting member are respectively located at opposite ends of the gap on the sleeve 11; when the sleeve 11 is in a closed state, the first connecting member is connected to the second connecting member so that the opposite ends of the sleeve 11 are connected and fixed. In this embodiment, the first connecting member cooperates with the second connecting member so that the sleeve 11 is in a closed state, so that it is sleeved and installed on the flange assembly 100, and the first connecting member and the second connecting member are relatively convenient to be disassembled, so that the sleeve 11 can be quickly switched between the closed state and the open state, so as to realize the installation and disassembly between the heating sleeve 1 and the flange assembly 100.

[0054] In this embodiment, the first connector and the second connector are respectively the hook surface and the loop surface of Velcro. In other embodiments, the first connector and the second connector can be respectively two tooth chains of a zipper, or the male buckle and the female buckle of a snap-on buckle, etc., which are not limited here, and the specific settings are determined according to needs.

[0055] In this embodiment, the sleeve 11 is made of a flexible material. The sleeve 11 has two states: flattened and curled. When the sleeve 11 is in the flattened state, the gap of the sleeve 11 increases and opens, so that the sleeve 11 can be square. When the sleeve 11 is in the curled state, the gap of the sleeve 11 decreases and closes, so that the sleeve 11 is cylindrical and can be installed on the flange assembly 100.

[0056] When the sleeve 11 is in a flattened state, the first connecting member and the second connecting member are respectively located at opposite ends of the sleeve 11 to open the sleeve 11. When the sleeve 11 is in a curled state, the first connecting member is connected to the second connecting member to connect and fix the opposite ends of the sleeve 11 to close.

[0057] In other embodiments, the sleeve 11 may be made of a rigid heat-insulating material. In this case, the sleeve 11 may be sleeved on the flange assembly 100 by increasing the gap on the sleeve 11 .

[0058] In this embodiment, the sleeve 11 includes an inner protective layer 111, a heat-insulating layer 112, and an outer protective layer 113, which are arranged in sequence from the inside to the outside. The inner protective layer 111, the heat-insulating layer 112, and the outer protective layer 113 are all made of flexible materials to facilitate the unfolding and curling of the sleeve 11. The inside and outside mentioned here are relative to the curled sleeve 11, the inside is the direction toward the heating space, and the outside is the direction away from the heating space, the same below.

[0059] The heating element 12 is disposed inside the sleeve 11 and is electrically connected to the external power source 300 to heat the flange assembly 100 and the bolts 200 passing through the flange assembly 100. Specifically, the heating element 12 is disposed between the internal protective layer 111 and the thermal insulation layer 112.

[0060] In this embodiment, the heating element 12 is in the shape of a sheet.

[0061] In this embodiment, the number of heating elements 12 is multiple, and the multiple heating elements 12 are arranged at intervals inside the sleeve 11. At this time, the multiple heating elements 12 cooperate to cover the outer peripheral surface of the internal protective layer 111, so that when the sleeve 11 is curled, the heating element 12 can cover the outer periphery of the heating space, so that the flange assembly 100 and the bolt 200 located in the heating space can be heated evenly. In other embodiments, the number of heating elements 12 can be one, and in this case, the heating element 12 covers the outer peripheral surface of the internal protective layer 111.

[0062] Furthermore, the heating sleeve 1 also includes protective bodies 13 arranged at both axial ends of the sleeve body 11. The two protective bodies 13 and the sleeve body 11 together enclose a heating space, which can better cover the flange assembly 100 and the bolts 200 to enhance the heating and heat preservation effects.

[0063] The protective body 13 is formed with a through hole 131 communicating with the heating space for allowing the pipes connected to the flanges to pass through.

[0064] In this embodiment, when the sleeve 11 is in a curled shape, the protective body 13 is annular. The protective body 13 has a radially extending slit, and when the sleeve 11 is in a curled shape, the slit and the seam on the sleeve 11 are located on the same plane, so that the protective body 13 can be unfolded and curled with the sleeve 11.

[0065] refer to Figure 2 In this embodiment, the protective body 13 includes a heat insulation layer 132 and a protective layer 133 wrapped around the outer periphery of the heat insulation layer 132 .

[0066] Continue to refer Figure 1 The thermal tightening device includes a controller 4 and a temperature sensor 5. The controller 4 is electrically connected to an external power source 300, and the heating element 12 is electrically connected to the controller 4. The controller 4 is used to control the opening and closing of the heating element 12 and the working power.

[0067] The controller 4 is provided with a preset temperature value and a maximum temperature value. The preset temperature value is the temperature required for the bolt 200 to be tightened during hot tightening, and the maximum temperature value is the maximum temperature reached after the heating element 12 is powered on. The controller 4 is also provided with a preset heating time value, which is the working time of the heating element 12, and when the preset heating time value is reached, the temperature of the bolt 200 can be raised to the preset temperature value.

[0068] The controller 4 includes a control unit and an alarm unit. The control unit is electrically connected to the alarm unit. The control unit is electrically connected to the heating element 12. A preset temperature value, a maximum temperature value and a preset heating time value are set in the controller 4.

[0069] The temperature sensor 5 is connected to the flange assembly 100 or the bolt 200, and is used to detect the temperature signal of the flange assembly 100 or the bolt 200. Specifically, the temperature sensor 5 includes a temperature measuring head 51 and a display 52 electrically connected to the temperature measuring head 51, the temperature measuring head 51 is connected and fixed to the flange assembly 100 or the bolt 200, and is used to detect the temperature signal of the flange assembly 100 or the bolt 200, and the display 52 receives and displays the temperature signal.

[0070] The temperature sensor 5 is electrically connected to the controller 4. Specifically, the control unit of the controller 4 can receive the temperature signal of the temperature sensor 5, and control the opening and closing of the heating element 12 according to the temperature signal, and when the temperature signal reaches the preset temperature value, the control unit controls the alarm unit to send an alarm signal.

[0071] The locking member has a through hole matching the bolt 200 , so that the locking member can be sleeved on the outer circumference of the bolt 200 and used to rotate the heated bolt 200 .

[0072] In this embodiment, the locking member is a standard torque tightening wrench, which can accurately tighten the bolt 200 according to the required torque.

[0073] The working principle of the above-mentioned heat tightening device is as follows:

[0074] First, the temperature measuring head 51 of the temperature sensor 5 is connected and fixed to the flange assembly 100 or the bolt 200. The heating sleeve 1 is curled and wrapped around the outer periphery of the flange assembly 100 to be thermally tightened, and then the first connecting member is connected to the second connecting member so that the heating sleeve 1 is sleeved on the flange assembly 100. The controller 4 is electrically connected to the external power supply 300, and a temperature preset value is preset on the control unit of the controller 4 according to the specifications and models of the flange assembly 100 and the bolt 200 to be thermally tightened, and a maximum temperature value and a heating time preset value are preset at the same time. The controller 4 is operated to control the start of the heating element 12 and to increase the working power of the heating element 12 so that it generates heat for the flange assembly 100 and the bolt 200 located in the heating space to heat up. When the heating element 12 reaches the highest temperature value, the control unit of the controller 4 controls and adjusts the working power of the heating element 12 for heat preservation. Before the preset value of the heating time is reached, the temperature of the heating element 12 drops. The controller 4 repeatedly controls the heating element 12 to adjust the working power to continuously generate heat for the flange assembly 100 and the bolt 200 to heat up. When the flange assembly 100 and the bolt 200 are heated to the preset temperature value, the control unit of the controller 4 controls the heating element 12 to turn off and controls the alarm unit to send an alarm signal to remind the staff. Then the first connecting member and the second connecting member are disassembled, and the heating sleeve 1 is removed from the flange assembly 100, and then the locking member is used to lock each bolt 200 one by one. During this process, when the temperature of the remaining unclamped bolts 200 drops, the above operation is repeated to heat the bolts 200 , and after the preset temperature is reached, the remaining bolts 200 are continuously tightened until all the bolts 200 are tightened.

[0075] Embodiment 2

[0076] Figure 4 It is a schematic diagram of the structure of the heating sleeve 2 in the second embodiment.

[0077] refer to Figure 4 The flange assembly 100 and the bolt 200 applicable to the heating sleeve 2 in this embodiment are consistent, and the structures of the controller 4, the temperature sensor 5, the locking member and the power supply 300 used in this embodiment are consistent with those in the first embodiment, and no further details are given here.

[0078] The structure of the heating sleeve 2 in this embodiment is substantially the same as that of the heating sleeve 1 in the first embodiment, that is, the sleeve body 21 has two states, namely, a flattened state and a curled state, and can be quickly switched between the curled state and the flattened state through a connecting assembly. The sleeve body 21 is composed of an inner protective layer 211, a heat-insulating layer 212, and an outer protective layer 213, and the heating element is disposed between the inner protective layer 211 and the heat-insulating layer 212.

[0079] However, it should be particularly noted that the structure of the protective body 22 of the heating jacket 2 in this embodiment is different from the protective body 13 of the heating jacket 1 in the first embodiment.

[0080] The following is combined with Figure 4 The structure of the protection body 22 in this embodiment is described in detail.

[0081] In this embodiment, the protective body 22 includes a plurality of protective parts 221, each of which is detachably connected to the sleeve 21, and the ends of any two adjacent protective parts 221 are fitted or detachably connected. This arrangement enables each protective part 221 to be independently connected to the sleeve 21 or detached from the sleeve 21, and exposes the end face of a partial flange, that is, only exposes a portion of the bolts 200 that penetrate the flange, so as to facilitate the subsequent operation of the locking bolts 200, which is convenient and simple to operate, and can continuously keep the flange and the remaining bolts 200 warm to prevent heat loss.

[0082] Specifically, the protection part 221 and the sleeve body 21 are detachably connected via a quick release part 23 , and the ends of any two adjacent protection parts 221 are spliced.

[0083] In other embodiments, the ends of any two adjacent protection portions 221 are detachably connected to the sleeve body 21 via a quick-release member 23 .

[0084] In this embodiment, each protection portion 221 is fan-shaped. When the sleeve 21 is curled, a plurality of protection bodies 22 are sequentially spliced ​​to form a ring.

[0085] In this embodiment, each protection portion 221 is composed of a heat insulation layer 222 and a protective layer 223 .

[0086] The working principle of the heat tightening device in this embodiment is as follows:

[0087] For the installation method of the heating sleeve 2 and the operation method of the controller 4, please refer to the first embodiment. After the flange assembly 100 and the bolts 200 are heated by the heating sleeve 2 to reach the preset temperature value, the control unit of the controller 4 controls the alarm unit to send an alarm signal and control the heating element to turn off, and then the protective parts 221 of the protective body 22 can be disassembled one by one to lock the exposed parts of the bolts 200. Repeat the above operation until all the bolts 200 are locked.

[0088] Embodiment 3

[0089] Figure 5 It is a schematic diagram of the structure of the heating sleeve 3 in the third embodiment.

[0090] refer to Figure 5The structures of the controller 4, the temperature sensor 5, the locking member and the power supply 300 in this embodiment are consistent with those in the first embodiment, and will not be described in detail here.

[0091] However, it should be particularly noted that the structure of the heating sleeve 3 in this embodiment is different from that of the heating sleeve 1 in the first embodiment.

[0092] Furthermore, the structure of the flange assembly 100 applicable to the heating sleeve 3 in this embodiment is different. The flange assembly 100 in this embodiment includes a flange, which is connected to an object by a plurality of bolts 200 .

[0093] The following is combined with Figure 5 The structure of the heating jacket 3 in this embodiment is described in detail.

[0094] In this embodiment, the heating sleeve 3 includes a sleeve body 31 , a heating element 32 and a protective body 33 .

[0095] The structures of the casing 31 and the heating element 32 are the same as those of the casing 11 and the heating element 12 in the first embodiment, that is, the casing 31 has two states, namely, flattened and curled, and can be quickly switched between the curled state and the flattened state through a connecting assembly. The casing 31 is composed of an inner protective layer 311, a heat-insulating layer 312, and an outer protective layer 313, and the heating element 32 is disposed between the inner protective layer 311 and the heat-insulating layer 312.

[0096] The protective body 33 is disposed at one axial end of the sleeve 31, and the protective body 33 and the sleeve 31 together enclose a heating space. In this embodiment, the protective body 33 covers one axial end of the sleeve 31, so that the heating space is closed at one end and open at the other end.

[0097] The protection body 33 includes a heat insulation layer 331 and a protective layer 332 .

[0098] In other embodiments, a through hole communicating with the heating space may be provided in the middle of the protective body 33 , and the specific arrangement depends on the needs.

[0099] The working principle of the heat tightening device in this embodiment can refer to the working principle of the heat tightening device in the first embodiment.

[0100] Embodiment 4

[0101] The flange assembly and bolts applicable to the heat tightening device in this embodiment are consistent with those in the heat tightening device in Embodiment 3. It should be particularly noted that the heat tightening device in this embodiment and the heat tightening device in Embodiment 3 differ in structure in that the structures of the heating sleeves of the two are different.

[0102] In this embodiment, the heating sleeve includes a sleeve body, a heating element and a protective body. The structures of the sleeve body and the heating element in this embodiment are consistent with those of the sleeve body and the heating element in the third embodiment. For details, please refer to the relevant description in the third embodiment. The structure of the protective body in this embodiment is consistent with the protective body structure in the second embodiment. For details, please refer to the relevant description in the second embodiment.

[0103] The working principle of the heat tightening device in this embodiment can refer to the working principle of the heat tightening device in the second embodiment.

[0104] It can be seen from the above technical solution that the utility model has at least the following advantages and positive effects:

[0105] In the heat tightening device of the present application, the sleeve is sleeved on the flange assembly, so that the flange assembly is placed in the heating space, and the flange assembly and the bolts are heated by the heating element arranged inside the sleeve, so that the flange assembly and the bolts can be heated evenly and the heating effect is better. Then, the heated bolts are rotated and tightened by the locking element, which facilitates the heat tightening operation of the bolts and has high versatility.

[0106] Furthermore, in the present application, the first connecting member cooperates with the second connecting member to make the sleeve body curled up so as to be mounted on the flange assembly, and the first connecting member and the second connecting member can be easily separated so that the sleeve body can be quickly switched between the curled state and the flattened state to realize the installation and disassembly between the heating sleeve and the flange assembly.

[0107] Furthermore, the heating sleeve also includes protective bodies arranged at the axial ends of the sleeve body. The protective bodies and the sleeve body together enclose a heating space, which can better cover the flange assembly and the bolts to enhance the heating and heat preservation effects.

[0108] Furthermore, the protective body includes a plurality of protective parts, each of which is detachably connected to the sleeve, and the ends of any two adjacent protective parts are fitted or detachably connected. This arrangement enables each protective part to be independently connected to the sleeve or detached from the sleeve, and exposes the end face of a partial flange, that is, only exposes a portion of the bolts penetrating the flange, for subsequent locking bolt operations, which is convenient and simple to operate, and can continuously insulate the flange and the remaining bolts to prevent heat loss.

[0109] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A heat tightening device, characterized in that: include: A heating sleeve, comprising a sleeve body and a heating element, wherein the sleeve body is formed with a heating space for accommodating a flange assembly; the heating element is arranged inside the sleeve body, and the heating element is electrically connected to an external power source, and is used to heat the flange assembly and bolts passing through the flange assembly; The locking piece has a through hole matched with the bolt, so that the locking piece can be sleeved on the outer periphery of the bolt and used to rotate the heated bolt.

2. The heat tightening device according to claim 1, characterized in that: The sleeve body comprises an inner protective layer, a heat-insulating layer and an outer protective layer which are sequentially arranged from the inside to the outside, and the heating element is arranged between the inner protective layer and the heat-insulating layer.

3. The heat tightening device according to claim 1, characterized in that: The heating sleeve further comprises protective bodies arranged at two axial ends of the sleeve body, and the two protective bodies and the sleeve body together enclose the heating space; a through hole communicating with the heating space is formed on the protective body.

4. The heat tightening device according to claim 1, characterized in that: The heating sleeve further comprises a protective body disposed at one axial end of the sleeve body, and the protective body and the sleeve body together enclose the heating space.

5. The heat tightening device according to claim 3 or 4, characterized in that: The protective body comprises a heat insulation layer and a protective layer covering the outer periphery of the heat insulation layer.

6. The heat tightening device according to claim 3 or 4, characterized in that: The protective body comprises a plurality of protective parts, each of which is detachably connected to the sleeve body, and ends of any two adjacent protective parts are fitted or detachably connected; Each of the protection parts is fan-shaped.

7. The heat tightening device according to claim 1, characterized in that: There are multiple heating elements, and the multiple heating elements are arranged inside the sleeve at intervals.

8. The heat tightening device according to claim 1 or 2 or 3 or 4 or 7, characterized in that: The heating sleeve further comprises a connecting assembly arranged on the sleeve body, and the connecting assembly is used to realize a detachable connection between the heating sleeve and the flange.

9. The heat tightening device according to claim 8, characterized in that: The connecting assembly comprises a first connecting member and a second connecting member which are detachably connected; The sleeve body is provided with a gap, the gap extends along the axial direction of the sleeve body, and opposite ends of the gap extend to the axial ends of the sleeve body respectively; The sleeve has two states, open and closed. When the sleeve is in the open state, the first connecting member and the second connecting member are respectively located at opposite ends of the gap on the sleeve; when the sleeve is in the closed state, the first connecting member is connected to the second connecting member so that the opposite ends of the sleeve are connected and fixed.

10. The heat tightening device according to claim 9, characterized in that: The sleeve body is made of flexible material; The sleeve has two states: flattened and curled. When the sleeve is in the flattened state, the first connecting member and the second connecting member are respectively located at opposite ends of the sleeve to open the sleeve; when the sleeve is in the curled state, the first connecting member is connected to the second connecting member to connect and fix the opposite ends of the sleeve to be closed.

11. The heat tightening device according to claim 1, characterized in that: The thermal tightening device comprises a controller and a temperature sensor, the controller is electrically connected to the external power supply, and the heating element is electrically connected to the controller; The temperature sensor is connected to the flange assembly or the bolt and is used to detect the temperature signal of the flange assembly or the bolt; the temperature sensor is electrically connected to the controller.

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