Heater sealing structure
By using a self-tightening sealing structure and enhancing the conical spherical seal with medium pressure, the leakage problem of the heater under high temperature and high pressure is solved, and effective sealing is achieved in high temperature and high pressure environments.
Patent Information
- Application Number
- CN202423092460.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-13
AI Technical Summary
The heaters in existing high-temperature and high-pressure equipment are prone to leakage under high-temperature and high-pressure environments. The rigidity of traditional mechanical seal structures weakens as the reaction force increases, leading to an increased risk of leakage.
The self-tightening seal method is adopted, which utilizes the specific pressure generated when the sealing medium pressure increases to enhance the sealing performance. The additional sealing specific pressure is provided by the conical spherical sealing structure and the locking nut, and the self-tightening seal is achieved by combining the butterfly gasket to compensate for assembly errors.
Under high temperature and high pressure conditions, the sealing performance is improved, the risk of leakage is reduced, and the sealing effect of the heater is ensured.
Smart Images
Figure CN223594953U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to sealing technical field, especially relate to a heater sealing structure. BACKGROUND
[0002] High temperature and high pressure equipment such as hot press tank, hydraulic kettle are widely used in important fields such as aerospace, automobile manufacturing. The sealing requirement of this kind of equipment is generally higher, especially in high pressure environment, because the strength and rigidity of metal are low at high temperature, leakage is most likely to occur in the area with high temperature. The position of the heater is generally the area with high temperature, and the heater needs wiring, which will cause at least one leakage point to be sealed.
[0003] At present, the heater of most high temperature and high pressure equipment adopts forced sealing mechanical structure, and adopts the way such as thread compression sealing gasket to seal, and the required thread pretightening force of this kind of sealing mode must be greater than the reaction force generated by the sealing medium. In high temperature and high pressure environment, the reaction force increases, and the rigidity of mechanical structure decreases, which has high requirement on the strength of thread and nearby mechanical structure, and after long time continuous use, leakage is easily generated. INVENTION CONTENTS
[0004] In view of the problem that the forced sealing mode of the heater is prone to leakage in high temperature and high pressure environment, the utility model provides a novel heater sealing structure, adopts self-tight sealing mode, and as the sealing medium pressure increases, the working sealing specific pressure increases, so as to enhance the sealing performance. The technical scheme is as follows:
[0005] A kind of heater sealing structure, comprising: heating pipe 1, sealing sleeve 2, lock nut 3, container wall 5, sealing seat 6,
[0006] Sealing seat 6 is located at the sealing medium side of container wall 5;Sealing seat 6 is provided with the first hole passing through sealing sleeve 2 along the axial direction, and the bottom of sealing seat 6 is provided with a tapered sealing surface;
[0007] Container wall 5 is provided with the second hole passing through sealing sleeve 2 along the axial direction, and the second hole is concentric with the first hole;
[0008] The outer thread of sealing sleeve 2 upper end is connected with lock nut 3, and the middle end has a spherical surface structure, and the spherical surface structure forms a spherical surface sealing with the tapered sealing surface of sealing seat 6;
[0009] Heating pipe 1 is located in sealing sleeve 2, and is fixed with both ends of sealing sleeve 2.
[0010] The locking nut 3 provides sealing specific pressure for the conical spherical surface sealing of the sealing sleeve 2 and the sealing seat 6, and generates sealing effect. When the medium pressure in the container wall 5 increases, the sealing sleeve 2 is pressed against the conical sealing surface of the sealing seat 6 under the action of the medium pressure, thereby providing additional sealing specific pressure.
[0011] Further, the sealing seat 6 is provided with a sleeve 7 away from the container wall 5, the sealing sleeve 2 passes through the container wall 5, the sealing seat 6 and the sleeve 7, the upper end is outside the container wall 5, the spherical surface structure of the middle end is in contact with the conical sealing surface of the sealing seat 6, and the tail end extends out of the sleeve 7, and the sleeve 7 is used for protecting the conical spherical surface sealing position of the sealing sleeve 2 and reducing contact with the medium side.
[0012] Further, the butterfly gasket 4 is arranged between the locking nut 3 and the container wall 5, the butterfly gasket 4 is sleeved outside the sealing sleeve 2, the locking nut 3 presses the butterfly gasket 4, and the butterfly gasket 4 can compensate the eccentricity of the sealing sleeve 2 and the sealing seat 6 caused by assembly.
[0013] Further, the heater sealing structure further comprises a connecting nut 8, the lower end of the sealing sleeve 2 is provided with external threads of the connecting nut 8, the connecting nut 8 is screwed from the external threads of the lower end of the sealing sleeve 2 and is in contact with the sleeve 7, and the gap between the sleeve 7 and the lower part of the sealing sleeve 2 is sealed.
[0014] Optionally, the sealing seat 6 is welded on the sealing medium side of the container wall 5.
[0015] Optionally, the heating pipe 1 and the sealing sleeve 2 are welded at two ends.
[0016] The utility model discloses at least the following beneficial effects:
[0017] The self-tight sealing mode is adopted, the working sealing specific pressure increases along with the increase of the sealing medium pressure, thereby the sealing performance is enhanced, and the sealing effect of the heater of the equipment can be better under the working demand of high temperature and high pressure. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 A heater sealing structure schematic view is provided for the utility model embodiment;
[0019] Among them, 1- heating pipe, 2- sealing sleeve, 3- locking nut, 4- butterfly gasket, 5- container wall, 6- sealing seat, 7- sleeve, 8- connecting nut. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0021] The features and illustrative embodiments of various aspects of the present application will be described below in detail. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without some of these specific details. The description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application. The present application is in no way limited to any specific arrangements and methods set forth below, but covers any modifications, replacements and changes of structures, methods and devices without departing from the spirit of the present application. In the drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessary obscuring of the present application.
[0022] It should be noted that the features in the embodiments of the present application and the embodiments can be combined with each other without conflict, and each embodiment can be mutually referenced and quoted. The present application will be described in detail below with reference to the drawings and in combination with the embodiments. The present application will be described in detail below in combination with the drawings and specific embodiments.
[0023] Referring to Figure 1 An embodiment of the present application provides a heater sealing structure, comprising: a heating pipe 1, a sealing sleeve 2, a locking nut 3, a container wall 5, a sealing seat 6,
[0024] The sealing seat 6 is located on the sealing medium side of the container wall 5; the sealing seat 6 is provided with a first through hole along the axial direction for the sealing sleeve 2 to pass through, and the bottom of the sealing seat 6 is provided with a conical sealing surface;
[0025] The container wall 5 is provided with a second through hole along the axial direction for the sealing sleeve 2 to pass through, and the second through hole is concentric with the first through hole;
[0026] The sealing sleeve 2 is provided with an external thread at the upper end for connecting the locking nut 3, and the middle end has a spherical surface structure, and the spherical surface structure forms a conical spherical surface sealing with the conical sealing surface of the sealing seat 6.
[0027] The locking nut 3 provides sealing specific pressure for the conical spherical surface sealing between the sealing sleeve 2 and the sealing seat 6, and generates sealing effect. When the medium pressure in the container wall 5 increases, the sealing sleeve 2 extrudes the conical sealing surface of the sealing seat 6 under the action of the medium pressure, and provides additional sealing specific pressure.
[0028] Referring to Figure 1 The utility model discloses another embodiment provides a kind of heater sealing structure, comprising: heating pipe 1, sealing sleeve 2, locking nut 3, butterfly gasket 4, container wall 5, sealing seat 6, sleeve 7, connecting nut 8.
[0029] The sealing seat 6 is welded on the sealing medium side of the container wall 5, and the sealing seat 6 is provided with a central hole for the sealing sleeve 2 to pass through and has a conical sealing surface.
[0030] The container wall 5 is also provided with a central hole for the sealing sleeve 2 to pass through, and the central hole of the sealing seat 6 is concentric with the central hole of the sealing seat 5.
[0031] The outer side upper end of the sealing sleeve 2 is provided with a thread, and the outer side middle end has a spherical surface structure, which forms a conical spherical surface sealing with the conical sealing surface of the sealing seat 6, and the lower end is provided with an external thread.
[0032] The sleeve 7 is connected with the sealing seat 6, and the sleeve 7 is used to protect the conical spherical surface sealing part of the sealing sleeve 2 and reduce the contact with the medium side.
[0033] The heating pipe 1 penetrates into the sealing sleeve 2, and the heating pipe 1 is welded at both ends with the sealing sleeve 2.
[0034] The sealing sleeve 2 passes through the central holes of the sealing seat 6 and the container wall 5 and the sleeve 7, the upper end is outside the container wall 5, the spherical surface structure of the middle end contacts with the conical surface of the sealing seat 6, and the lower end extends out of the sleeve 7.
[0035] The butterfly gasket 4 is sleeved outside the sealing sleeve 2 from the outside of the container wall 5, and the locking nut 3 is screwed into the thread of the sealing sleeve 2 from the outside, which compresses the butterfly gasket 4, and the butterfly gasket can compensate for the different concentricities of the sealing sleeve 2 and the sealing seat 6 caused by assembly.
[0036] The locking nut 3 provides sealing specific pressure for the conical spherical surface sealing between the sealing sleeve 2 and the sealing seat 6, and generates sealing effect. When the medium pressure in the container wall 5 increases, the sealing sleeve 2 extrudes the conical spherical surface of the sealing seat 6 under the action of the medium pressure, and provides additional sealing specific pressure.
[0037] The connecting nut 8 is screwed into the external thread of the lower end of the sealing sleeve 2 from the outside, contacts with the sleeve 7, and seals the gap between the sleeve 7 and the lower part of the sealing sleeve 2.
[0038] The utility model discloses a self-tight sealing structure of heater, which comprises a hollow sealing sleeve, a heating tube and a sealing sleeve.
[0039] The utility model provides a novel heater sealing structure. Adopting self-tight sealing mode, with the increase of sealing medium pressure, working sealing specific pressure rises, thereby strengthen sealing performance. Make under the working demand of high temperature and high pressure, the sealing of the heater of equipment still can obtain better sealing effect.
[0040] The above only expresses the embodiment of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope. It should be pointed out that for ordinary skilled person in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. In addition, the part of the utility model is not detailed is the conventional technology.
Claims
1. A heater seal structure, characterized by, The application relates to a heater sealing structure. The sealing seat is located on the sealing medium side of the container wall; the sealing seat is provided with a first middle hole for the sealing sleeve to pass through in the axial direction, and the bottom of the sealing seat is provided with a conical sealing surface; The container wall is provided with a second middle hole for the sealing sleeve to pass through in the axial direction, and the second middle hole is concentric with the first middle hole; The upper end of the sealing sleeve is provided with external threads for connecting the locking nut, and the middle end is provided with a spherical surface structure which forms a conical spherical surface sealing with the conical sealing surface of the sealing seat; The heating pipe is located in the sealing sleeve and is fixed at both ends of the sealing sleeve. The end of the sealing seat away from the container wall is provided with a sleeve, the sealing sleeve passes through the container wall, the sealing seat and the sleeve, the upper end of the sealing sleeve is located outside the container wall, the spherical surface structure of the middle end of the sealing sleeve is in contact with the conical sealing surface of the sealing seat, and the lower end of the sealing sleeve extends out of the sleeve.
2. The heater seal structure of claim 1, wherein, The butterfly gasket is sleeved outside the sealing sleeve, and the locking nut presses the butterfly gasket.
3. The heater seal structure of claim 1, wherein, The heater sealing structure further comprises a connecting nut, the lower end of the sealing sleeve is provided with external threads for connecting the connecting nut, the connecting nut is screwed into the external threads of the lower end of the sealing sleeve, is in contact with the sleeve, and seals the gap between the sleeve and the lower part of the sealing sleeve.
4. The heater seal structure of claim 1, wherein, 5. The heater sealing structure according to claim 1, wherein The sealing seat is welded on the sealing medium side of the container wall. The heating pipe is welded at both ends of the sealing sleeve.
6. The heater seal structure of claim 1, wherein,