An externally latching frame heating strip securing device

Abstract

The present application relates to the field of track snow melting device, specifically is a kind of outer locking frame heating strip fixing device, including crossbeam plate, two left and right symmetrical arrangement ear seat are fixedly installed on crossbeam plate top side, ear seat is fixedly connected with outer locking frame by bolt connection mode, the left branch and right branch are respectively hinged in the left and right ends of crossbeam plate, and the U-shaped clamp for self-adapting abutting of heating strip is connected on the left branch and right branch by abutting unit, the present application is driven by crossbeam plate left branch and right branch to the outer locking frame is embraced type clamping, make the arc-shaped clamp on left branch limit heating strip connector, while through the U-shaped clamp on left branch and right branch self-adapting abutting of heating strip vertical section, cooperate with the abutting block to abut and limit the lower side of heating strip horizontal section, push assembly continuously pushes moving plate, so that U-shaped clamp automatically compensates vibration and temperature difference deformation, eliminate the contact thermal resistance caused by gap.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of track snow melting device, in particular to a kind of outer locking frame heating strip fixing device. BACKGROUND

[0002] The outer locking frame is the core component of railway turnout conversion system, used for accurately locking turnout point rail, to ensure train operation safety, in cold regions or winter, outer locking frame is prone to mechanical jam due to snow and ice accumulation, and serious turnout conversion failure may be caused, to ensure the reliable operation of equipment, heating strip needs to be installed on outer locking frame, to eliminate ice and snow accumulation by electric heating, to maintain the normal function of locking frame.

[0003] Currently, heating strip is mainly fixed on the surface of outer locking frame by rigid clamping plate or clamp, which depends on bolt fastening clamping plate on both sides, so that heating strip is attached to the outer wall of outer locking frame, however, outer locking frame usually has a special-shaped structure with upper wide and lower narrow, and different models have significant size difference, so it is necessary to repeatedly adjust the position of clamping plate and tighten the bolt one by one during installation, which is complicated and inefficient, and difficult to meet the demand of on-site rapid installation.

[0004] In addition, the continuous vibration when train passes and the change of cold and hot temperature difference are easy to cause the micro deformation of existing fixing device, so that micro gap is generated between heating strip and outer locking frame, and existing fixing device cannot dynamically compensate such deformation, once the gap is formed, the heat conduction path is blocked, the contact thermal resistance is significantly increased, so that the heat energy of heating strip cannot be effectively transmitted to the locking frame, the ice melting efficiency is greatly reduced, and even equipment failure is caused. SUMMARY

[0005] In order to solve the above technical problems, the technical scheme adopted by the present application is: a kind of outer locking frame heating strip fixing device, including crossbeam plate, two left and right symmetrical ear seats are fixedly installed on the upper side of crossbeam plate, ear seat is fixedly connected with outer locking frame by bolt connection, left branch and right branch are respectively hinged on the left and right ends of crossbeam plate, arc clamp for limiting cylindrical connector of heating strip is fixedly installed on left branch, and U-shaped clamp for self-adapting abutting of heating strip is connected to left branch and right branch through abutting unit.

[0006] The left branch and the right branch are both L-shaped structures.

[0007] The abutting unit includes a moving plate hinged on the side of the U-shaped clamp away from the center of the crossbeam plate, and the moving plates on the left and right sides are respectively connected to the left branch and the right branch through left and right sliding.

[0008] The horizontal section of the left and right supporting arms is provided with a waist-shaped slot, and a fitting block is fitted in the corresponding waist-shaped slot in the interior of the horizontal section of the left and right supporting arms.

[0009] Preferably, a fixing plate for blocking the outer locking frame is fixedly installed on the front side of the cross beam plate, and a vertical slot is arranged in the front and back of the ear seat.

[0010] Preferably, a threaded column is fixedly installed on the upper side of the cross beam plate, a hexagonal column is fixedly installed on the upper side of the threaded column, a synchronous block is slidably arranged on the outer side of the hexagonal column, and a connecting rod is hingedly connected between the upper end of the synchronous block and the left and right supporting arms.

[0011] Preferably, a nut is rotatably arranged at the lower end of the synchronous block, the inner diameter of the nut is larger than the hexagonal column, and the upper end surface of the hexagonal column and the ear seat is located at the lower part of the upper side of the outer locking frame.

[0012] Preferably, a linkage is slidably arranged in front and back at the hinged axis of the left and right supporting arms and the cross beam plate, a tension spring is arranged between the left and right supporting arms and the linkage at the corresponding position, a notch is arranged in the circumferential direction of the linkage at equal intervals on the rear side edge of the linkage, and a tooth ring plate is fixedly installed on the cross beam plate at the coaxial position of the linkage.

[0013] Preferably, the pushing assembly comprises an L-shaped cavity arranged in the vertical section of the left and right supporting arms, a one-way valve is fixedly installed on the lower side of the vertical section of the L-shaped cavity, a plunger is slidably arranged on the upper side of the vertical section of the L-shaped cavity, and a pushing spring is arranged between the moving plate and the inner wall of the horizontal section of the L-shaped cavity.

[0014] Preferably, the fitting block is in a cylindrical structure with a planar structure on the upper side, a wedge-shaped plate is slidably arranged in the left and right directions in the interior of the horizontal section of the left and right supporting arms, and a helical spring is arranged between the left and right supporting arms and the corresponding wedge-shaped plate.

[0015] Preferably, a clamping tooth plate is fixedly installed on the side of the wedge-shaped plate away from the center of the cross beam plate, an adjusting block is slidably arranged in the up and down directions in the interior of the horizontal section of the left and right supporting arms, and a ratchet plate is slidably connected to the adjusting block in the up and down directions at equal intervals on the lower side of the adjusting block.

[0016] Preferably, the distance between the two adjacent ratchet plates is greater than the distance between the two adjacent clamping teeth on the clamping tooth plate, and a return spring is arranged between the ratchet plate and the adjusting block.

[0017] Preferably, a control rod is slidably arranged on the front side of the adjusting block, a guide slot is arranged on the horizontal section of the left and right supporting arms for the sliding of the corresponding control rod, the part of the guide slot close to the center of the cross beam plate is in a vertical structure, and the part of the guide slot away from the center of the cross beam plate is in an inclined structure.

[0018] The beneficial effects of the present application are as follows: firstly, the present application uses the cross beam plate to drive the left and right supporting arms to embrace the outer locking frame, the arc-shaped clamp on the left supporting arm limits the heating strip connector, the U-shaped clamp on the left and right supporting arms self-adapts to the vertical section of the heating strip, and the fitting block limits the lower side of the horizontal section of the heating strip, the pushing assembly continuously pushes the moving plate, the U-shaped clamp automatically compensates for vibration and temperature difference deformation, always applies effective fitting force to the heating strip, eliminates the contact thermal resistance caused by the gap, and guarantees the heat conduction efficiency.

[0019] Secondly, the present application manually places the cross beam plate on the outer locking frame, quickly adjusts the position by turning the left and right supporting arms, and then only needs to tighten the nut to lock the left and right supporting arms, the notch on the linkage engages with the teeth of the tooth ring plate under the action of the tension spring, prevents the left and right supporting arms from reversing, ensures the locking stability, greatly improves the installation efficiency and quickly adapts to the special-shaped structure of the outer locking frame which is wide at the top and narrow at the bottom.

[0020] Thirdly, the present application uses the cylindrical fitting block with a planar upper side to self-adaptively fit the lower side of the horizontal section of the heating strip, pushes the cylindrical surface of the fitting block under the action of the spiral spring, automatically compensates for deformation, the ratchet plate and the ratchet plate are one-way meshed, prevent the wedge-shaped plate from moving in the opposite direction, maintain the continuous abutting force on the horizontal section of the heating strip, and avoid fitting failure caused by vibration. BRIEF DESCRIPTION OF DRAWINGS

[0021] The present application will be further described below in combination with the drawings and examples.

[0022] Figure 1 is a structural schematic view when the present application fixes the heating strip on the outer locking frame.

[0023] Figure 2 is a structural schematic view when the present application connects the cross beam plate on the outer locking frame.

[0024] Figure 3 is a front view of the cross beam plate, the left supporting arm, and the U-shaped clamp in the present application.

[0025] Figure 4 is a partial sectional view of the cross beam plate, the threaded column, the hexagonal column, and the nut in the present application.

[0026] Figure 5 is a partial sectional view of the left supporting arm, the linkage, the tooth ring plate, and the cross beam plate in the present application.

[0027] Figure 6 is a structural schematic view of the left supporting arm, the arc-shaped clamp, the fitting block, and the moving plate in the present application.

[0028] Figure 7 is a structural schematic view of the U-shaped clamp and the moving plate in the present application.

[0029] Figure 8 FIG. 2 is a partial cross-sectional view of the left arm, pushing assembly, wedge-shaped plate, and toothed plate in the present application.

[0030] Figure 9 FIG. 3 is a structural schematic view of the toothed plate, ratchet plate, adjusting block, and operating rod in the present application.

[0031] In the figure: 1, beam plate; 2, left arm; 3, right arm; 4, abutting unit; 5, U-shaped clamp; 6, fitting block; 11, ear seat; 12, fixed plate; 13, threaded column; 14, hexagonal column; 15, synchronous block; 16, connecting rod; 17, linkage; 21, arc-shaped clamp; 41, moving plate; 42, pushing assembly; 61, wedge-shaped plate; 62, toothed plate; 63, adjusting block; 64, ratchet plate; 151, nut; 171, toothed ring plate; 421, L-shaped cavity; 422, one-way valve; 423, plunger; 631, operating rod. DETAILED DESCRIPTION

[0032] Embodiments of the present application are described in detail below. The embodiments described below are exemplary only, and are not to be construed as limiting the present application. Where specific technical or conditions are not mentioned in the embodiments, the technical or conditions described in the literature in the field or according to the product manual are used.

[0033] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , an external locking frame heating strip fixing device includes a beam plate 1, two left and right symmetrical ear seats 11 are fixedly installed on the upper side of the beam plate 1, the ear seats 11 are fixedly connected with the external locking frame through bolt connection, left arms 2 and right arms 3 are hingedly connected to the left and right ends of the beam plate 1, respectively, arc-shaped clamps 21 for limiting the cylindrical connecting heads of the heating strips are fixedly installed on the left arms 2, and U-shaped clamps 5 for self-adapting abutting of the heating strips are connected to the left arms 2 and right arms 3 through abutting units 4.

[0034] Referring to Figure 2 , Figure 3 and Figure 4 , a fixed plate 12 for blocking the external locking frame is fixedly installed on the front side of the beam plate 1, vertical grooves are formed in the ear seats 11, and the left arms 2 and right arms 3 are in L-shaped structure.

[0035] When it is needed to fix the heating strip on the outer locking frame, the operator manually places the cross beam plate 1 on the upper part of the outer locking frame which has been installed on the track, and makes the fixing plate 12 on the cross beam plate 1 located at the front part of the outer locking frame, at this time the operator moves the cross beam plate 1, the vertical slot on the ear seat 11 drives the bolt connecting the outer locking frame and the track, so as to realize the connection and locking of the cross beam plate 1 and the outer locking frame by using the existing connecting bolt of the outer locking frame, without additional configuration of connecting parts, while ensuring the adaptability of the outer locking frame, the convenience of installation is improved.

[0036] When the bolt on the outer locking frame passes through the vertical slot on the corresponding ear seat 11, the cross beam plate 1 is moved downward, so that the lower side of the cross beam plate 1 is tightly attached to the outer locking frame, thereby increasing the contact area between the outer locking frame and the cross beam plate 1, so as to increase the stability of the cross beam plate 1 on the outer locking frame, then the locking nut is screwed in front of the bolt passing through the ear seat 11, so that the locking nut moves backward and pushes the cross beam plate 1 to move backward synchronously, until the fixing plate 12 driven by the cross beam plate 1 abuts against the outer locking frame, thereby completing the connection of the cross beam plate 1 and the outer locking frame. The connection operation can be carried out on the outer locking frame which has been connected to the track, without disassembling the outer locking frame, which can meet the requirement of installing the heating strip later.

[0037] In the initial state, the lower ends of the left and right supporting arms 2 and 3 are away from the cross beam plate 1, so that when the operator places the cross beam plate 1 on the outer locking frame, the cross beam plate 1 can drive the left and right supporting arms 2 and 3 to move upward to the left and right sides of the outer locking frame, solving the problem that the existing split type fixing support needs to be assembled on the outer locking frame, and improving the convenience of installation.

[0038] Then the operator covers the heating strip on the outer locking frame from bottom to top, and then the operator manually rotates the left and right supporting arms 2 and 3, so that the lower ends of the left and right supporting arms 2 and 3 move towards the outer locking frame, and then the left and right supporting arms 2 and 3 drive the U-shaped clamp 5 to push the vertical section of the heating strip through the abutting unit 4, so that the U-shaped clamp 5 can not only push the vertical section of the heating strip to tightly adhere to the outer locking frame, but also can maintain the abutting force on the heating strip through the abutting unit 4, so as to ensure that the heating strip is tightly adhered to the outer locking frame in the temperature difference and vibration environment.

[0039] It should be noted that, as shown in Figure 1 As shown in Figure 6 The supporting plate is fixedly installed on the left supporting arm 2 and located at the lower part of the arc-shaped clamp 21.

[0040] When the U-shaped clamp 5 limits the heating part of the heating strip, the left supporting arm 2 drives the supporting plate on it to rotate to the lower part of the cylindrical connecting head of the heating strip, thereby supporting the cylindrical connecting head of the heating strip, and the left supporting arm 2 drives the arc-shaped clamp 21 to cover the outside of the cylindrical connecting head of the heating strip, thereby limiting the cylindrical connecting head of the heating strip.

[0041] Referring to Figure 1 , Figure 3 and Figure 5 , the left supporting arm 2 and the right supporting arm 3 are provided with linkage members 17 at the hinge axes of the horizontal beam plate 1 and slide forward and backward, a tension spring is arranged between the left supporting arm 2, the right supporting arm 3 and the corresponding linkage member 17, and the rear edge of the linkage member 17 is provided with notches at equal intervals in the circumferential direction, and a tooth ring plate 171 is fixedly installed on the horizontal beam plate 1 at the coaxial position of the linkage member 17.

[0042] It should be noted that, as shown in Figure 5 , the tooth ring plate 171 is composed of a rear ring plate structure and a plurality of teeth fixedly installed on the front side of the ring plate structure at equal intervals in the circumferential direction of the ring plate structure, the teeth correspond one-to-one to the notches of the linkage member 17, and the tension spring can drive the linkage member 17 to move backward in the initial state, so that the linkage member 17 drives the notches on it to cover the outside of the teeth of the tooth ring plate 171.

[0043] This makes the left supporting arm 2 and the right supporting arm 3 drive the linkage member 17 on them to rotate synchronously when the lower end of the left supporting arm 2 or the right supporting arm 3 rotates towards the direction close to the outer locking frame, so that the notch edge of the linkage member 17 contacts the tooth inclined surface of the tooth ring plate 171, thereby making the linkage member 17 move forward along the tooth inclined surface and stretch the tension spring, and when the lower end of the left supporting arm 2 or the right supporting arm 3 wants to rotate away from the outer locking frame, the notch inner wall of the linkage member 17 is in contact with the tooth straight surface of the tooth ring plate 171, so that the tooth ring plate 171 blocks the reverse rotation of the linkage member 17, thereby realizing the one-way rotation of the left supporting arm 2 or the right supporting arm 3, and the operator only needs to manually rotate the left supporting arm 2 or the right supporting arm 3 to quickly position the heating strip.

[0044] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , a threaded column 13 is fixedly installed on the upper side of the horizontal beam plate 1, a hexagonal column 14 is fixedly installed on the upper side of the threaded column 13, a synchronous block 15 is slidably arranged on the outside of the hexagonal column 14, and a connecting rod 16 is hingedly connected between the upper end of the left supporting arm 2 and the right supporting arm 3 and the synchronous block 15.

[0045] Referring to Figure 3 and Figure 4The lower end of the synchronization block 15 is rotatably provided with a nut 151, the inner diameter of the nut 151 is larger than the hexagonal column 14, and the upper end of the hexagonal column 14 and the ear seat 11 are located on the lower part of the outer locking frame upper side.

[0046] When the operator manually rotates one of the left support arm 2 or the right support arm 3, the left support arm 2 or the right support arm 3 can drive the synchronization block 15 to slide on the hexagonal column 14 through the connecting rod 16 thereon, and the movement of the synchronization block 15 can drive the other of the left support arm 2 or the right support arm 3 to move synchronously through the other connecting rod 16, so that the left support arm 2 or the right support arm 3 can rotate synchronously, and the operator only needs to hold the heating strip with one hand and turn one of the left support arm 2 or the right support arm 3 with the other hand to complete the initial positioning of the heating strip, solving the problem that two people are needed to complete the installation in the prior art.

[0047] After the operator manually turns the left support arm 2 or the right support arm 3 to the specified position, the synchronization block 15 drives the nut 151 to move downward to the position of the threaded column 13, and at this time the left support arm 2 or the right support arm 3 has completed the preliminary abutting positioning of the heating strip through the U-shaped clamp 5, and then the operator screws the nut 151 into the outside of the threaded column 13 through a wrench, so that the nut 151 drives the synchronization block 15 to move downward, and the synchronization block 15 pushes the upper ends of the left support arm 2 and the right support arm 3 away from each other through the connecting rod 16, so as to realize that the lower ends of the left support arm 2 and the right support arm 3 approach each other, so as to clamp the heating strip through the U-shaped clamp 5 and complete the locking of the position of the heating strip.

[0048] Referring to Figure 3 , Figure 6 and Figure 8 , the horizontal sections of the left support arm 2 and the right support arm 3 are provided with a waist-shaped groove, and the horizontal sections of the left support arm 2 and the right support arm 3 are both fitted with a fitting block 6 for abutting the lower side of the horizontal section of the heating strip along the corresponding waist-shaped groove slot, and the fitting block 6 is in a cylindrical structure with a planar structure on the upper side.

[0049] When the synchronization block 15 drives the nut 151 to move downward to the position of the threaded column 13, the horizontal sections of the left support arm 2 and the right support arm 3 move to the lower part of the horizontal section of the heating strip, so that the planar structure of the fitting block 6 on the left support arm 2 and the right support arm 3 abuts the horizontal section of the heating strip, and since the fitting block 6 is fitted with the waist-shaped groove slot, the fitting block 6 can move up and down and rotate, so that when the planar structure of the fitting block 6 abuts the horizontal section of the heating strip, the reaction force of the heating strip on the fitting block 6 can make the fitting block 6 automatically rotate, so that the planar structure of the fitting block 6 self-adapts to the horizontal section of the heating strip, and the abutting force on the lower part of the heating strip is ensured.

[0050] It should be noted that when the nut 151 is moved downward to the threaded area of the threaded column 13, the U-shaped clamp 5 on the left support arm 2 and the right support arm 3 only simply limits and abuts the heating part of the heating strip, and does not realize the abutting of the heating part of the heating strip, and because there is a certain gap between the heating part of the heating strip and the outer locking frame itself, the nut 151 can be screwed on the threaded column 13, and the U-shaped clamp 5 is pushed to abut the heating part of the heating strip and is attached to the outer locking frame, and at the same time, the planar structure of the attachment block 6 abuts the lower part of the heating strip.

[0051] It should also be noted that, as shown in Figure 8 , a rectangular slot perpendicular to the planar structure is provided in the inside of the attachment block 6, and a limiting square rod is fixedly installed on the horizontal section of the left support arm 2 and the right support arm 3 and inserted into the rectangular slot in the inside of the attachment block 6, and the width of the limiting square rod is smaller than that of the rectangular slot, so that the attachment block 6 can be rotated at a certain angle, thereby preventing the free rotation of the attachment block 6, causing the planar structure to rotate to the lower part, and causing the phenomenon that the planar structure of the attachment block 6 does not contact the heating strip.

[0052] Referring to Figure 1 , Figure 3 , Figure 6 and Figure 8 , the abutting unit 4 comprises a moving plate 41 hingedly connected to the U-shaped clamp 5 away from the center of the cross beam plate 1, and the moving plates 41 on the left and right sides are respectively and slidably connected to the left support arm 2 and the right support arm 3, and the left support arm 2 and the right support arm 3 always push the moving plate 41 towards the center of the cross beam plate 1 through the push assembly 42 provided thereon.

[0053] Referring to Figure 8 , the push assembly 42 comprises an L-shaped cavity 421 provided in the vertical section of the left support arm 2 and the right support arm 3, a one-way valve 422 fixedly installed on the lower side of the vertical section of the L-shaped cavity 421, and a plunger 423 slidably provided on the upper side of the vertical section of the L-shaped cavity 421, a push spring is provided between the moving plate 41 and the inner wall of the horizontal section of the L-shaped cavity 421, and a compression spring is provided between the upper side of the plunger 423 and the inner wall of the vertical section of the L-shaped cavity 421.

[0054] It should be noted that, as shown in Figure 3 and Figure 8 , a lever is fixedly installed on the outer side of the plunger 423 and protrudes to the outer side of the left support arm 2 or the right support arm 3, and a through slot is also provided in the left support arm 2 or the right support arm 3 for the upward and downward sliding of the lever, and the operator manually pushes the lever upward in advance, so that the lever drives the plunger 423 to move upward, until the lower end surface of the plunger 423 moves to the upper side of the through slot, so that the L-shaped cavity 421 is in communication with the outside, and then the operator injects hydraulic oil into the inside of the L-shaped cavity 421 through the through slot by using a syringe.

[0055] Subsequently, the external force on the push rod is removed, the extrusion spring pushes the plunger 423 downward by its own elastic force, the plunger 423 pushes the hydraulic oil to flow through the one-way valve 422 to the inside of the horizontal section of the L-shaped chamber 421, and the hydraulic oil fills the horizontal section of the L-shaped chamber 421, at this time the push spring is in a compressed state, because the one-way valve 422 can prevent the hydraulic oil from flowing back to the inside of the vertical section of the L-shaped chamber 421, and the hydraulic oil cannot be compressed, so that the moving plate 41 cannot move away from the outer locking frame, and because of the elastic force of the push spring on the moving plate 41, the moving plate 41 always has a tendency to move towards the outer locking frame, thereby the moving plate 41 can automatically extend to compensate for the gap problem caused by deformation due to vibration and temperature difference.

[0056] It should be noted that the hydraulic oil is selected by those skilled in the art, which can maintain fluidity in low temperature environment.

[0057] When the nut 151 is tightened on the threaded column 13, the left arm 2 or the right arm 3 drives the U-shaped clamp 5 at the corresponding position through the moving plate 41 to abut against the vertical section of the heating strip, and because the moving plate 41 is hinged with the U-shaped clamp 5, the U-shaped clamp 5 can adapt to the vertical section of the heating strip, thereby when the left arm 2 or the right arm 3 continues to rotate from the vertical posture, the U-shaped clamp 5 can still exert a surface contact abutting force on the vertical section of the heating strip, ensuring the abutting effect.

[0058] It should be noted that the moving plate 41 in the initial state is locked on the left arm 2 or the right arm 3 by the captive screw, preventing the moving plate 41 from moving when the hydraulic oil is injected, and also preventing the moving plate 41 from moving when the U-shaped clamp 5 is not in contact with the heating strip, when the U-shaped clamp 5 abuts against the heating strip, the captive screw is loosened, so that the moving plate 41 can compensate for the gap by moving, and the captive screw is not shown in the figure.

[0059] It should also be noted that, as shown in Figure 7 , the side of the U-shaped clamp 5 away from the outer locking frame is fixedly installed with fixed blocks arranged symmetrically up and down, and the two fixed blocks on the same U-shaped clamp 5 are located at the upper and lower positions of the moving plate 41 at the corresponding position, and the fixed blocks are in contact with the moving plate 41 by the U-shaped clamp 5 to limit the rotation angle of the U-shaped clamp 5.

[0060] Referring to Figure 3 , Figure 6 and Figure 8 , the horizontal section of the left arm 2 and the right arm 3 is slidably provided with a wedge-shaped plate 61, and a spiral spring is arranged between the left arm 2 and the right arm 3 and the corresponding wedge-shaped plate 61.

[0061] When the horizontal structure of the fitting block 6 abuts against the horizontal section of the heating strip, the reaction force of the horizontal section of the heating strip to the fitting block 6 pushes the fitting block 6 downward, so that the cylindrical surface of the fitting block 6 abuts against the wedge surface of the wedge-shaped plate 61, and the wedge-shaped plate 61 pushes the fitting block 6 upward to abut against the horizontal section of the heating strip through the elastic force of the helical spring, so that the deformation problem caused by vibration and temperature difference can be automatically compensated.

[0062] In order to prevent the wedge-shaped plate 61 from moving away from the outer locking frame, the present application designs the following structure: refer to Figure 3 、 Figure 6 、 Figure 8 and Figure 9 , the wedge-shaped plate 61 is fixedly installed with a toothed plate 62 on the side away from the center of the cross beam plate 1, the horizontal section of the left supporting arm 2 and the right supporting arm 3 is slidably provided with an adjusting block 63 inside, the lower side of the adjusting block 63 is provided with a ratchet plate 64 slidably connected thereon at equal intervals in the left-right direction, a return spring is arranged between the ratchet plate 64 and the adjusting block 63, and the interval between two adjacent ratchet plates 64 is greater than the interval between two adjacent teeth on the toothed plate 62.

[0063] The corresponding ratchet plate 64 is inserted into the tooth groove of the toothed plate 62 through the elastic force of the return spring, when the wedge-shaped plate 61 and the toothed plate 62 move towards the outer locking frame, the toothed plate 62 can push the ratchet plate 64 upward through the inclined surface of the tooth, and vice versa, the vertical surface of the ratchet plate 64 blocks the toothed plate 62 from moving away from the outer locking frame, so that the wedge-shaped plate 61 always pushes the fitting block 6, and the fitting block 6 applies a stable abutting force to the lower part of the heating strip.

[0064] At the same time, the interval between two adjacent ratchet plates 64 is greater than the interval between two adjacent teeth on the toothed plate 62, so that each ratchet plate 64 can independently block the toothed plate 62 from moving away from the outer locking frame, the control of the moving stroke of the toothed plate 62 by the ratchet plate 64 is refined, and the stability of the abutting force applied by the fitting block 6 to the lower part of the heating strip is improved.

[0065] In order to prevent the ratchet plate 64 from controlling the moving direction of the toothed plate 62 in the initial state, causing the heating strip to push the fitting block 6 to move downward, and then causing the fitting block 6 to move to the top of the waist-shaped groove of the left supporting arm 2 and the right supporting arm 3 in the initial state, resulting in the loss of the ability of the fitting block 6 to move again to compensate for the gap of the heating strip, the present application makes the following design: continue to refer to Figure 3 、 Figure 6 、 Figure 8 and Figure 9The front side of the adjusting block 63 is provided with a control rod 631, and the horizontal section of the left supporting arm 2 and the right supporting arm 3 is provided with a guide groove for sliding of the corresponding control rod 631, and the part of the guide groove close to the center of the beam plate 1 is in vertical structure, and the part of the guide groove far from the center of the beam plate 1 is in inclined structure.

[0066] In the initial state, the control rod 631 is located on the upper part of the horizontal section of the left supporting arm 2 or the right supporting arm 3, so that the control rod 631 and the ratchet plate 64 driven by the adjusting block 63 are not in contact with the toothed plate 62, so that the toothed plate 62 can move in both directions, when the abutting block 6 abuts against the heating strip, the operator manually moves the control rod 631 along the vertical section of the guide groove downwards, in this process, the control rod 631 drives the ratchet plate 64 to be in contact with the toothed plate 62 and compresses the return spring.

[0067] Then the operator manually moves the control rod 631 to the inside of the inclined structure of the guide groove, thereby limiting the up and down position of the adjusting block 63 by limiting the left and right position of the control rod 631, so that the return spring always drives the ratchet plate 64 to be in contact with the toothed plate 62 by the elastic force of the return spring.

[0068] It should be noted that the skilled in the art can increase the limiting structure on the control rod 631 according to the actual situation, for example, a thread is formed on the outer side of the control rod 631, and the control rod 631 and the left supporting arm 2 or the right supporting arm 3 are fixedly connected together by screwing a nut on the control rod 631, so as to firmly limit the control rod 631, and such method is a common means in the prior art, which will not be described herein.

[0069] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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 therefore cannot be understood as indicating or implying 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 limiting the present application.

[0070] In addition, the terms "first", "second", "one", "two" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second", "one", "two" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0071] In this application, unless otherwise clearly indicated and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0072] The embodiments of the specific implementation are the preferred embodiments of the application, not to limit the protection scope of the application, therefore; all equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. An externally locking frame heating strip fixing device, comprising a crossbeam plate, characterized in that, Two symmetrically arranged ear seats are fixedly installed on the upper side of the crossbeam plate. The ear seats are fixedly connected to the outer locking frame by bolts. The left and right ends of the crossbeam plate are respectively hinged with a left support arm and a right support arm. An arc-shaped clamp is fixedly installed on the left support arm to limit the cylindrical connector of the heating strip. Both the left and right support arms are connected to a U-shaped clamp that adaptively abuts the heating strip through abutment units. Both the left and right support arms are L-shaped structures. The abutment unit includes a movable plate hinged to the side of the U-shaped clamp away from the center of the crossbeam plate. The movable plates on the left and right sides are slidably connected to the left and right support arms respectively. The left and right support arms push the movable plates towards the center of the crossbeam plate through the pushing components set on them. The horizontal sections of the left and right support arms are provided with waist-shaped grooves, and the interior of the horizontal sections of the left and right support arms are fitted with fitting blocks for fitting the lower side of the horizontal section of the heating strip along the corresponding waist-shaped groove opening. A threaded column is fixedly installed on the upper side of the crossbeam plate, and a hexagonal column is fixedly installed on the upper side of the threaded column. A synchronizing block is slidably arranged on the outer side of the hexagonal column. A connecting rod is hinged between the synchronizing block and the upper end of the left and right support arms. The pushing assembly includes an L-shaped chamber opened inside the vertical sections of the left and right support arms. A one-way valve is fixedly installed on the lower side of the vertical section of the L-shaped chamber, and a plunger is slidably arranged on the upper side of the vertical section of the L-shaped chamber. A pushing spring is arranged between the moving plate and the inner wall of the horizontal section of the L-shaped chamber. The bonding block has a cylindrical structure with a planar upper side. Wedge plates are slidably installed inside the horizontal sections of the left and right support arms. A helical spring is installed between the left and right support arms and the corresponding wedge plates. A toothed plate is fixedly installed on the side of the wedge plate away from the center of the crossbeam plate. Adjustment blocks are slidably installed inside the horizontal sections of the left and right support arms. Racket plates that are slidably connected to the adjustment blocks are equidistantly installed on the lower side of the adjustment blocks along the left and right directions.

2. The external locking frame heating strip fixing device according to claim 1, characterized in that, A fixing plate for blocking the outer locking frame is fixedly installed on the front side of the crossbeam plate, and a vertical groove with a through arrangement is opened on the ear seat.

3. The external locking frame heating strip fixing device according to claim 2, characterized in that, The lower end of the synchronization block is rotatably equipped with a nut, the inner diameter of which is larger than that of the hexagonal prism. The upper end faces of the hexagonal prism and the ear seat are both located at the lower part of the upper side of the outer locking frame.

4. The external locking frame heating strip fixing device according to claim 1, characterized in that, Linkage components are slidably installed at the hinge axis of the left and right support arms and the crossbeam plate. Tension springs are installed between the left and right support arms and the corresponding linkage components. Notches are opened at equal intervals along the circumference of the rear edge of the linkage component. A toothed ring plate is fixedly installed on the crossbeam plate at the coaxial position of the linkage component.

5. The external locking frame heating strip fixing device according to claim 1, characterized in that, The distance between two adjacent ratchet plates is greater than the distance between two adjacent teeth on the locking plate, and a return spring is provided between the ratchet plate and the adjusting block.

6. The external locking frame heating strip fixing device according to claim 1, characterized in that, The front side of the adjustment block is equipped with a control lever that slides left and right. The horizontal sections of the left and right support arms are provided with guide grooves for the corresponding control levers to slide. The part of the guide groove near the center of the crossbeam plate is vertical, and the part of the guide groove away from the center of the crossbeam plate is inclined.

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