Electric heating rod locking structure used in dryer

Abstract

The utility model relates to an electric heating rod locking structure used in a dryer, which is characterized in that a buckle is uniformly provided with a plurality of clamping jaws, each clamping jaw is provided with an inclined convex corner, a through hole is formed in the center of the buckle, an inclined surface groove is formed in the periphery of one side, close to the clamping jaws, of the through hole, a sealing ring is arranged in the inclined surface groove, and the clamping jaws, the inclined convex corners and the inclined surface groove are wrapped to form a cavity body; the heating rod is inserted into the cavity and penetrates out of the through hole in the center of the buckle; the locking of the heating rod and the sealing of the central through hole of the corresponding buckle are completed in one step in the pressing link of the heating rod, so that the assembly process of the dryer is simplified, and the assembly efficiency is improved; the high-air-pressure-resistant air tightness between the heating rod and the shell sealing structure does not depend on a fit clearance between the heating rod and the shell mounting hole wall, so that the influence of heating and cooling of the heating rod is avoided, and the air tightness failure caused by structural deformation after long-term working of a plastic assembly is avoided; the lead end of the heating rod does not need to be locked by a clamp spring or a thread, so that the wire outlet is more convenient when the heating rod is mounted.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric heating technical field, especially a kind of electric heating rod locking structure for dryer. BACKGROUND

[0002] At present, air dryer in suspension gas supply system generally uses molecular sieve as drying agent, and realizes regeneration by heating mode. Electric heating rod needs to be integrated injection molded with drying cavity or matched with drying cavity by locking structure, and the matching structure provides structural fixation and high pressure gas seal of electric heating rod connection surface, and during the process of electric heating module cycle heating and cooling, it needs to ensure that the expansion and shrinkage of the combined part material do not cause high pressure gas leakage and sealing failure of drying cavity. When electric heating rod and drying cavity are designed separately, locking structure is needed to realize the above functions, at the same time, locking structure requires simple structure, which is convenient for the installation and fixation of electric heating rod and shell; and the air tightness of locking structure is not affected by the working temperature change of electric heating rod; the wiring of electric heating rod under the condition of using locking structure needs to be conveniently led out, and the wiring path has no risk of gas leakage, so as to ensure the normal work of electric heating rod. SUMMARY

[0003] In view of the problem that if the locking structure cannot provide reliable high pressure resistant sealing performance for the heating rod, and cannot ensure the continuous and effective structure air tightness of electric heating rod under high, low temperature and temperature cycle change, high pressure gas leakage and sealing failure occur, a kind of electric heating rod locking structure for dryer is proposed.

[0004] The technical scheme of the utility model is: a kind of electric heating rod locking structure for dryer, including heating rod, buckle and sealing ring, heating rod is cylindrical, buckle is uniformly provided with multiple clamping pawls, the outermost end of clamping pawl is provided with inclined convex angle, the center of buckle is provided with a through hole, the diameter of through hole matches the diameter of heating rod, inclined surface groove is provided on the periphery of the side of through hole close to clamping pawl, sealing ring is provided in inclined surface groove, sealing ring is circular, clamping pawl, inclined convex angle and inclined surface groove form a cavity, and heating rod is inserted into the cavity.

[0005] Preferably, one end of the heating rod is the lead-out wire of the heating rod, a boss is provided on the outer circumference of the heating rod, and the boss is fixed between the lead-out wire.

[0006] Preferably, the edge of the boss close to the fixed section is provided with a guide bevel.

[0007] Preferably, the buckle is integrated with the shell of the dryer.

[0008] Preferably, the slope of the inclined convex angle is towards the center of the buckle.

[0009] Preferably, the claw and the bevel and the bevel groove form a cavity, the fixed segment of the heating rod is inserted into the cavity, and the through hole in the center of the buckle passes out.

[0010] Preferably, the bevel groove is provided with a limiting end face to prevent the heating rod from damaging the sealing ring under the push of high-pressure gas.

[0011] The utility model discloses the beneficial effect lies in: in this locking structure, the locking of heating rod and the sealing of corresponding buckle center through -hole are completed in the press -in link of heating rod, simplify the assembly process of dryer, improve the assembly efficiency, when the dryer works, the drying chamber is full of high -pressure compressed air, through this locking structure, the air pressure pressure pushes the heating rod boss clamping sealing ring, plays high -pressure self -sealing effect, and the air -tightness of heating rod and shell sealing structure does not depend on the cooperation gap between heating rod and shell mounting hole wall, therefore, is not affected by heating rod heating and cooling, avoids the air -tightness failure of the structural deformation of plastic assembly after long -term work, because the lead end of heating rod does not need to use again the lock spring or the threaded locking, the outgoing line of heating rod installation is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the front view of the utility model for the electric heating rod locking structure in the dryer,

[0013] Figure 2 It is the structure diagram of the utility model sealing ring,

[0014] Figure 3 It is the side view of the utility model first embodiment four claw buckle corresponding installation,

[0015] Figure 4 It is the side view of the utility model second embodiment three claw buckle corresponding installation.

[0016] In the drawing, the component name corresponding to each reference sign is as follows:

[0017] 1, heating rod, 11, boss, 12, guide bevel, 13, fixed segment, 14, outgoing line, 2, buckle, 21, claw, 211, bevel, 22, bevel groove, 23, limiting end face, 3, sealing ring. DETAILED DESCRIPTION

[0018] The utility model will be described in detail below in combination with the drawings and specific embodiments. The embodiment is implemented on the premise of the technical scheme of the utility model, and gives detailed implementation mode and specific operation process, but the protection scope of the utility model is not limited to the following examples.

[0019] REFERENCE Figure 1 , 2As shown, the utility model provides a kind of electric heating rod locking structure in dryer, including heating rod 1, buckle 2 and sealing ring 3;Heating rod 1 is cylinder, and one end of heating rod 1 is the lead-out wire 14 of heating rod, and boss 11 is arranged on the outer circumference of heating rod 1, and fixed section 13 is between boss 11 and lead-out wire 14, and the edge of the side of boss 11 close to fixed section 13 is equipped with guide bevel 12;

[0020] The buckle 2 is the buckle integrated with dryer housing, and a plurality of clamping jaws 21 are uniformly provided on the buckle 2, the outermost end of the clamping jaw 21 is provided with an inclined convex angle 211, the slope of the inclined convex angle 211 is the center of the buckle 2, a through hole is provided in the center of the buckle 2, the diameter of the through hole matches the diameter of the heating rod 1, a bevel groove 22 is provided around the side of the through hole close to the clamping jaw 21, a limiting end surface 23 is provided around the bevel groove 22, a sealing ring 3 is provided in the bevel groove 22, the sealing ring 3 is annular, the clamping jaw 21, the inclined convex angle 211 and the bevel groove 22 form a cavity, the fixed section 13 of the heating rod 1 can be inserted into the cavity, and the heating rod 1 can pass through the through hole in the center of the buckle 2, and the sealing ring 3 and the bevel groove 22 wall and the side of the boss 11 are kept in a compressed state after the heating rod 1 is installed;After assembly, the high pressure in the cavity will push the heating rod 1 to compress the rubber ring 1, so that the limiting end surface 23 provides a limiting support to ensure that the sealing ring 3 can not rely on the heating rod 1 to support under high pressure, so as to avoid damaging the sealing ring 3 under the pushing of high pressure gas.

[0021] Specifically, the buckle 2 can be a high-temperature-resistant plastic, and the sealing ring 3 can be a high-temperature-resistant rubber ring, and the inner diameter of the rubber ring 3 is in interference fit with the heating rod 1 to ensure the sealing property;

[0022] Reference Figure 3 、 4 As shown, gaps are provided between adjacent clamping jaws 21 to keep the boss 11 compressed during the process, and the clamping jaw 21 has a certain elastic deformation and return ability. Figure 3 The first embodiment is a four-clamping-jaw buckle. Figure 4 The second embodiment is a three-clamping-jaw buckle. The number and distribution of different clamping jaws 21 correspond to different sizes of heating rods 1 and the clamping force requirement after assembly.

[0023] Working principle and beneficial effects are as follows:

[0024] In the technical solution, the buckle 2 integrated with the dryer shell is designed to fix and seal the structure of the heating rod 1 at the insertion end of the heating rod 1; the locking force of the buckle 2 is provided by the boss 11 on the heating rod, the clamping jaw 21 provided on the buckle 2, and the compressed sealing ring 3; after the sealing ring 3 is sleeved on the fixed section 13 of the heating rod, it is pressed into the through hole in the center of the buckle 2, and the inner wall of the through hole provides the axial positioning of the heating rod 1 during the pressing process; the guide inclined angle 12 of the boss 11 of the heating rod 1 and the inclined convex angle 211 at the front end of the clamping jaw 2 provide a radial thrust for the clamping jaw 21 during the pressing process to make the clamping jaw 21 open, and after the boss 11 is pressed in, the clamping jaw 21 elastically deforms and restores to clamp the other end face of the boss 11, completing the locking of the heating rod 1, and at the same time, the through hole is sealed by the boss 11 side face, the compressed sealing ring 3, and the inclined surface groove 22; in the case of using the locking structure, the fixed section 13 of the heating rod and the through hole do not need to be locked by a circlip or a threaded lock any more, and the assembly of the heating rod 1 is more convenient and fast.

[0025] In the locking structure, the locking of the heating rod 1 and the sealing of the through hole in the center of the buckle 2 are completed in one step during the pressing of the heating rod 1, simplifying the assembly process of the dryer and improving the assembly efficiency; when the dryer works, the drying chamber is filled with high-pressure compressed air, and through the locking structure, the air pressure pushes the boss of the heating rod to clamp the sealing ring, achieving a high-pressure self-sealing effect; at the same time, the air tightness of the sealing structure of the heating rod 1 and the shell does not depend on the cooperation gap between the heating rod 1 and the shell mounting hole wall, so it is not affected by the heating and cooling of the heating rod 1, avoiding the air tightness failure caused by the structural deformation of the plastic assembly after long-term work; since the circlip or threaded lock is not needed at the lead end of the heating rod 1, the outlet of the heating rod 1 during installation is more convenient.

[0026] It should be noted that the above terms "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The meaning of "a plurality of" is two or more. "Mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected.

[0027] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form or in essence. It should be noted that those skilled in the art can make some improvements and supplements without departing from the present application, and these improvements and supplements should also be considered as the protection scope of the present application. Any equivalent changes, modifications and evolutions made by those skilled in the art without departing from the spirit and scope of the present application, and all equivalent embodiments of the present application, are still within the scope of the technical solutions of the present application.

Claims

1. A locking structure for an electric heating rod in a dryer, characterized in that, The device includes a heating rod (1), a buckle (2), and a sealing ring (3). The heating rod (1) is cylindrical. The buckle (2) is evenly provided with multiple claws (21). The outermost end of the claw (21) is provided with a convex angle (211). The buckle (2) has a through hole in the center. The diameter of the through hole matches the diameter of the heating rod (1). A sloping groove (22) is provided around the through hole on the side near the claw (21). A sealing ring (3) is provided in the sloping groove (22). The sealing ring (3) is circular. The claw (21), the convex angle (211), and the sloping groove (22) form a cavity. The heating rod (1) is inserted into this cavity and passes through the through hole in the center of the buckle (2).

2. The electric heating rod locking structure for a dryer according to claim 1, characterized in that, One end of the heating rod (1) is the lead wire (14) of the heating rod. A boss (11) is provided on the outer circumference of the heating rod (1). A fixed section (13) is between the boss (11) and the lead wire (14).

3. The electric heating rod locking structure for a dryer according to claim 2, characterized in that, The edge of the boss (11) near the fixed section (13) is provided with a guide bevel (12).

4. The electric heating rod locking structure for a dryer according to claim 1, characterized in that, The buckle (2) is integrated with the dryer housing.

5. The electric heating rod locking structure for a dryer according to claim 1, characterized in that, The slope direction of the inclined surface of the convex angle (211) is the center of the buckle (2).

6. The electric heating rod locking structure for a dryer according to claim 3, characterized in that, The claw (21), the oblique convex angle (211) and the oblique groove (22) form a cavity. The fixing section (13) of the heating rod (1) is inserted into this cavity and passes through the through hole in the center of the buckle (2).

7. The electric heating rod locking structure for a dryer according to claim 1, characterized in that, The inclined groove (22) is surrounded by a limiting end face (23) to prevent the heating rod (1) from damaging the sealing ring (3) under the push of high pressure gas.

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