CN111925106A

CN111925106A - Adjustable roundness calibration device of all-glass vacuum solar heat collection tube

Info

Publication number: CN111925106A
Application number: CN202010800680.0A
Authority: CN
Inventors: 陈乐乐
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2020-11-13

Abstract

The invention discloses an adjustable roundness calibrating device of an all-glass vacuum solar heat collecting tube, which comprises a fixed cylinder, wherein the lower end of the fixed cylinder is fixedly connected with a supporting table, a circular through hole is formed in the fixed cylinder, a first limiting groove is formed in the fixed cylinder and positioned below the circular through hole, a first strip-shaped opening is formed between the first limiting groove and the circular through hole in a penetrating manner, a first driving mechanism is arranged in the first limiting groove, the upper end of the first driving mechanism penetrates through the first strip-shaped opening to extend into the circular through hole and is fixedly connected with a lower calibrating ring, a servo motor of the first driving mechanism drives a screw rod, the screw rod drives a connecting block, the connecting block drives a straight rod to move, the straight rod drives the lower calibrating ring and the upper calibrating ring to move, and the lower calibrating ring and the upper calibrating ring smooth convex parts on the surface of the outer tube of the solar heat collecting tube, and the mode of, the calibration is made more stable.

Description

Adjustable roundness calibration device of all-glass vacuum solar heat collection tube

Technical Field

The invention relates to a roundness calibration device, in particular to an adjustable roundness calibration device of an all-glass vacuum solar heat collection tube, and belongs to the technical field of solar heat collection tubes.

Background

The all-glass vacuum solar heat collecting pipe is composed of an inner glass pipe with a solar selective absorption coating and a coaxial cover glass pipe, wherein a high vacuum is pumped between interlayers of the inner pipe and the outer pipe and is used for collecting solar heat to heat a fluid medium device in the pipe, and a plurality of all-glass vacuum solar heat collecting pipes are regularly arranged in an array and are assembled into a solar heat collector with a header pipe, a tailstock, a reflector and the like; the solar water heating system is combined with components such as a circulating pipeline, a water storage tank and the like.

At present, when the outer tube production of full glass vacuum solar energy collection pipe, still there is certain waste heat behind the outer tube thermoplasticity, the surface is not finalized the design completely, consequently the surface often can produce some archs, influence the use of solar energy collection pipe, traditional solution all makes to adopt the manual work to press partial arch, makes the outer tube resume original state, but this kind of mode effect is very unobvious, the bulge does not resume the former state completely, the inefficiency that the manual work was pressed, and do not have fine centre gripping instrument to carry out auxiliary stay.

Disclosure of Invention

The invention provides an adjustable roundness calibration device of an all-glass vacuum solar heat collection tube, which effectively solves the problems in the prior art.

In order to solve the technical problems, the invention provides the following technical scheme:

the invention relates to an adjustable roundness calibration device of an all-glass vacuum solar heat collection tube, which comprises a fixed cylinder, wherein the lower end of the fixed cylinder is fixedly connected with a support table, a circular through hole is formed in the fixed cylinder, a first limiting groove is formed in the fixed cylinder and positioned below the circular through hole, a first strip-shaped opening is formed between the first limiting groove and the circular through hole in a penetrating manner, a first driving mechanism is arranged in the first limiting groove, the upper end of the first driving mechanism penetrates through the first strip-shaped opening to extend into the circular through hole and is fixedly connected with a lower calibration ring, a second limiting groove is formed in the fixed cylinder and positioned above the circular through hole, a second strip-shaped opening is formed between the second limiting groove and the circular through hole in a penetrating manner, a second driving mechanism is arranged in the second limiting groove, the lower end of the second driving mechanism penetrates through the second strip-shaped opening to extend into the circular through hole and is fixedly connected with, go up calibration ring and calibration ring joint down, the fixed cylinder is inside and be located the second spacing groove top and seted up the spout, run through between spout and the second spacing groove and seted up third bar opening, the fixed cylinder both ends just are located circular through-hole top and all are provided with stop gear, and are a pair of both sides all are provided with fixed establishment, four around the stop gear fixed establishment two bisymmetry settings are at the fixed cylinder both ends.

According to a preferable technical scheme of the invention, the first driving mechanism comprises a servo motor, the servo motor is fixedly connected to one end of the fixed cylinder through a fixed frame, the output end of the servo motor extends into the first limiting groove and is fixedly connected with a lead screw, one end of the lead screw, far away from the servo motor, is rotatably connected to the inner wall of one side, far away from the servo motor, of the first limiting groove through a bearing, a connecting block is sleeved on the lead screw in a threaded manner, a plurality of first rollers are fixedly connected to the lower end of the connecting block, the lower ends of the plurality of first rollers are all in contact with the inner wall of the first limiting groove, a straight rod is fixedly connected to the upper end of the connecting block, and the upper end of the straight rod extends into the.

According to a preferred technical scheme, the second driving mechanism comprises a hydraulic cylinder, the output end of the hydraulic cylinder is fixedly connected with a connecting rod, the lower end of the connecting rod penetrates through the second strip-shaped opening to extend into the circular through hole and is fixedly connected with a U-shaped plate, the lower end of the U-shaped plate is fixedly connected with the upper calibration ring, the upper end of the hydraulic cylinder is fixedly connected with a sliding mechanism, the upper end of the sliding mechanism penetrates through the third strip-shaped opening to extend into the sliding groove and is in sliding connection with the sliding groove, the lower end of the hydraulic cylinder is fixedly connected with a plurality of second rollers, and the lower ends of the plurality of second rollers are in contact with the.

As a preferred technical scheme of the invention, the sliding mechanism comprises a sliding rod and a sliding block, the sliding rod is fixedly connected to the upper end of the hydraulic cylinder, the upper end of the sliding rod penetrates through the third strip-shaped opening to extend into the sliding groove and is fixedly connected with the sliding block, and the sliding block is in sliding connection with the sliding groove.

As a preferred technical scheme of the invention, the limiting mechanism comprises an L-shaped rod, the L-shaped rod is fixedly connected with the fixed cylinder, and the lower end of the L-shaped rod is fixedly connected with the fixed ring.

As a preferable technical scheme, the fixing mechanism comprises a fixing plate, the fixing plate is fixedly connected with a fixing cylinder, one side, close to the circular through hole, of the fixing plate is fixedly connected with a threaded pipe, a threaded rod is connected to the inner portion of the threaded pipe in a threaded mode, one end, far away from the circular through hole, of the threaded rod penetrates through the fixing plate and is fixedly connected with a rotating handle, and one end, close to the circular through hole, of the threaded rod penetrates through the side wall of the fixing ring and extends into the fixing ring and is rotatably connected with.

According to a preferred technical scheme, both sides of the lower end of the upper calibration ring are fixedly connected with fixed blocks, the lower end of each fixed block is fixedly connected with a pair of limiting frames, the inner walls of the sides, close to each other, of the limiting frames are fixedly connected with springs, the other ends of the springs are fixedly connected with clamping blocks, both sides of the upper end of each upper calibration ring and each lower calibration ring are provided with clamping grooves, the clamping blocks are clamped with the clamping grooves, the clamping blocks are U-shaped, and the clamping grooves are T-shaped.

As a preferred technical scheme of the invention, two sides of the lower end of the lower calibration ring are fixedly connected with supporting rods, the lower ends of the supporting rods are fixedly connected with sliding pads, and the sliding pads are in contact with the inner wall of the circular through hole.

The invention has the following beneficial effects:

1. the servo motor through the first driving mechanism drives the screw rod, the screw rod drives the connecting block, the connecting block drives the straight rod to move, the straight rod drives the lower calibration ring and the upper calibration ring to move, so that the lower calibration ring and the upper calibration ring perform smoothing treatment on the convex part of the surface of the outer pipe of the solar heat collection pipe, and the screw rod drives the connecting block to move, so that calibration is more stable.

2. The L-shaped rod and the fixing mechanism which are used for limiting and fixing the outer tube of the solar heat collecting tube are fixed, the fixing mechanism can clamp and fix the outer tube of the solar heat collecting tube, the rotating handle on the fixing mechanism drives the threaded rod to rotate, the threaded rod rotates in the threaded tube, and the threaded rod drives the half rings to move, so that the tube heads of the outer tubes of the solar heat collecting tube are clamped and fixed by the pair of half rings, the outer tube of the solar heat collecting tube is fixed, and the flattening operation of the outer tube of the solar heat collecting tube is facilitated.

3. Through second actuating mechanism, the pneumatic cylinder drives connecting rod and U template, makes it can drive the removal of calibration ring to make it be convenient for to go up the calibration ring and smooth out the flat operation with fingers to solar energy collection pipe outer tube, and fixed block, spacing frame, spring and the fixture block structure that sets up can make calibration ring and calibration ring joint down, make the whole operation of smoothing out the flat to solar energy collection pipe outer tube more high-efficient.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a front cut-away view of the present invention;

FIG. 2 is a front elevational view of the present invention;

FIG. 3 is a side cutaway view of the present invention;

FIG. 4 is a side elevational view of the present invention;

FIG. 5 is an enlarged view taken at A of FIG. 3 of the present invention;

fig. 6 is a schematic structural view of the fixing mechanism of the present invention.

In the figure: 1. a fixed cylinder; 2. a support table; 3. a limiting mechanism; 31. an L-shaped rod; 32. a fixing ring; 4. a fixing mechanism; 41. turning a handle; 42. a threaded rod; 43. a fixing plate; 44. a threaded pipe; 45. a half ring; 5. a first drive mechanism; 51. a servo motor; 52. a fixed mount; 53. a screw rod; 54. connecting blocks; 55. a first roller; 56. a straight rod; 6. a lower calibration ring; 61. a card slot; 7. a second drive mechanism; 71. a hydraulic cylinder; 72. a sliding mechanism; 721. a slide bar; 722. a slider; 73. a connecting rod; 74. a U-shaped plate; 75. a second roller; 8. an upper calibration ring; 81. a fixed block; 82. a limiting frame; 83. a spring; 84. a clamping block; 9. a chute; 10. a second limit groove; 11. a first limit groove; 12. a slide pad; 13. a circular through hole; 14. a support rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): as shown in fig. 1-6, the adjustable roundness calibration device for an all-glass vacuum solar collector tube comprises a fixed cylinder 1, wherein a support table 2 is fixedly connected to the lower end of the fixed cylinder 1, the support table 2 is used for supporting the fixed cylinder 1, a circular through hole 13 is formed in the fixed cylinder 1, a first limit groove 11 is formed in the fixed cylinder 1 and located below the circular through hole 13, a first strip-shaped opening is formed between the first limit groove 11 and the circular through hole 13 in a penetrating manner, a first driving mechanism 5 is arranged in the first limit groove 11, the upper end of the first driving mechanism 5 penetrates through the first strip-shaped opening and extends into the circular through hole 13, a lower calibration ring 6 is fixedly connected to the first limit groove 6, the lower calibration ring 6 is driven by the first driving mechanism 5 to move, so that the lower calibration ring 6 performs flattening operation on an outer tube, a second limit groove 10 is formed in the fixed cylinder 1 and located above the circular through hole 13, a second strip-shaped opening is arranged between the second limiting groove 10 and the circular through hole 13 in a penetrating manner, a second driving mechanism 7 is arranged in the second limiting groove 10, the lower end of the second driving mechanism 7 extends into the circular through hole 13 through the second strip-shaped opening and is fixedly connected with an upper calibration ring 8, the upper calibration ring 8 is driven to move by the second driving mechanism 7, so that the outer tube of the solar heat collecting tube can be conveniently installed, the outer tube of the solar heat collecting tube can be more quickly installed, the upper calibration ring 8 is clamped with a lower calibration ring 6, a sliding groove 9 is arranged in the fixed cylinder 1 and positioned above the second limiting groove 10, a third strip-shaped opening is arranged between the sliding groove 9 and the second limiting groove 10 in a penetrating manner, the sliding groove 9 is convenient for the second driving mechanism 7 to move, so that the second driving mechanism 7 is more stable during moving, and limiting mechanisms 3 are arranged at two ends of the fixed cylinder 1 and positioned above the circular through, the front side and the rear side of the limiting mechanism 3 are provided with fixing mechanisms 4, the four fixing mechanisms 4 are symmetrically arranged at two ends of the fixing barrel 1 in pairs, and the fixing mechanisms 4 and the limiting mechanism 3 can clamp and support the outer pipe, so that the outer pipe can be conveniently calibrated.

Second actuating mechanism 7 includes pneumatic cylinder 71, pneumatic cylinder 71 output end fixedly connected with connecting rod 73, the connecting rod 73 lower extreme passes second bar opening and extends to inside and fixedly connected with U template 74 of circular through-hole 13, U template 74 lower extreme and last calibration ring 8 fixed connection, pneumatic cylinder 71 upper end fixedly connected with slide mechanism 72, slide mechanism 72 upper end passes third bar opening and extends to inside and with spout 9 sliding connection of spout 9, a plurality of second gyro wheels 75 of pneumatic cylinder 71 lower extreme fixedly connected with, it is a plurality of second gyro wheel 75 lower extreme all contacts with the bottom wall in second spacing groove 10, drives connecting rod 73 through the pneumatic cylinder 71 that sets up and removes, makes connecting rod 73 drive the removal of U template 74 to calibration ring 6 under the messenger goes up calibration ring 8 decline and joint.

The sliding mechanism 72 includes a sliding rod 721 and a sliding block 722, the sliding rod 721 is fixedly connected to the upper end of the hydraulic cylinder 71, the upper end of the sliding rod 721 passes through the third strip-shaped opening and extends to the inside of the sliding groove 9, the sliding block 722 is connected with the sliding groove 9 in a sliding manner, and the sliding block 722 slides in the sliding groove 9, so that the hydraulic cylinder 71 can be more stable when moving, and the upper calibration ring 8 is more stable when moving.

Wherein, the first driving mechanism 5 comprises a servo motor 51, the servo motor 51 is fixedly connected to one end of the fixed cylinder 1 through a fixed frame 52, the output end of the servo motor 51 extends to the inside of the first limit groove 11 and is fixedly connected with a lead screw 53, one end of the lead screw 53, which is far away from the servo motor 51, is rotatably connected to the inner wall of one side of the first limit groove 11, which is far away from the servo motor 51, through a bearing, a connecting block 54 is sleeved on the lead screw 53 in a threaded manner, the lower end of the connecting block 54 is fixedly connected with a plurality of first rollers 55, the lower ends of the plurality of first rollers 55 are all contacted with the inner wall of the first limit groove 11, the upper end of the connecting block 54 is fixedly connected with a straight rod 56, the upper end of the straight rod 56 passes through a first strip-shaped opening and extends to the inside of the circular through hole 13 to be fixedly connected with, so that the connecting block 54 drives the straight rod 56 to move, and the straight rod 56 drives the lower calibration ring 6 to move.

Wherein, stop gear 3 includes L type pole 31, L type pole 31 and fixed 1 fixed connection of a section of thick bamboo, the solid fixed ring 32 of L type pole 31 lower extreme fixedly connected with, the L type pole 31 of setting play the fixed effect to solid fixed ring 32, prevent solid fixed ring 32's rocking.

The upper calibration ring 8 and the lower calibration ring 6 are connected in a clamped manner, the upper calibration ring 8 and the lower calibration ring 6 can be driven to move together by the aid of the clamping blocks 84, the clamping blocks 84 are U-shaped, and the clamping grooves 61 are T-shaped.

Wherein, fixed establishment 4 includes fixed plate 43, fixed plate 43 and fixed 1 fixed connection of section of thick bamboo, fixed plate 43 is close to one side fixedly connected with screwed pipe 44 of circular through-hole 13, screwed pipe 44 internal thread is connected with threaded rod 42, the one end that circular through-hole 13 was kept away from to threaded rod 42 is passed fixed plate 43 and fixedly connected with and is changeed 41, threaded rod 42 is close to the one end of circular through-hole 13 and is passed fixed ring 32 lateral wall and extend to fixed ring 32 inside and rotate and be connected with semi-ring 45, drives threaded rod 42 through changeing 41 and remove in screwed pipe 44 to make threaded rod 42 drive the removal of semi-ring 45, make semi-ring 45 carry out the centre gripping fixedly to the tube head of solar energy collection pipe.

Wherein, the equal fixedly connected with bracing piece 14 in lower extreme both sides of calibration ring 6 down, bracing piece 14 lower extreme fixedly connected with sliding pad 12, sliding pad 12 contacts with circular through-hole 13 inner wall, and the bracing piece 14 and the sliding pad 12 structure that set up play the effect of calibration ring 6 under the auxiliary stay, make calibration ring 6 more steady when removing down.

Specifically, when the solar heat collecting tube is used, a power supply is switched on, one end of the outer tube of the solar heat collecting tube passes through the fixing ring 32 at one end of the fixing cylinder 1 and passes through the circular through hole 13 until the outer tube passes through the fixing ring 32 at the other end of the fixing cylinder 1, then two ends of the outer tube of the solar heat collecting tube are placed on the fixing ring 32 and the tube body of the outer tube is placed on the lower calibration ring 6 in the circular through hole 13, then a pair of rotating handles 41 at one end of the fixing cylinder 1 are simultaneously rotated, so that the pair of rotating handles 41 drive the threaded rods 42 to rotate in the threaded tubes 44, the pair of threaded rods 42 move oppositely, the pair of semi-rings 45 are driven by the pair of threaded rods 42 to move oppositely until the pair of semi-rings 45 contact and align, one end of the outer tube of the solar heat collecting tube is clamped, and similarly, the pair of rotating handles 41 at the other end of the, then the hydraulic cylinder 71 is started, the hydraulic cylinder 71 drives the connecting rod 73 to descend, and drives the upper calibration ring 8 at the lower end of the U-shaped plate 74 to descend, so that the fixing block 81 at the lower end of the upper calibration ring 8 slides into the clamping groove 61 at the upper end of the lower calibration ring 6, the clamping block 84 is extruded by the inner wall of the clamping groove 61 to enter the limiting frame 82, and the spring 83 is contracted, when the limiting frame 82 is propped against the inner bottom of the clamping groove 61, the spring 83 is restored, and the clamping block 84 is pushed to move, so that the clamping block 84 is propped against the inner wall of the clamping groove 61, the upper calibration ring 8 and the lower calibration ring 6 are clamped and are stuck to the outer wall of the outer tube of the solar heat collection tube, then the servo motor 51 is started, so that the servo motor 51 drives the screw rod 53 to rotate, so that the screw rod 53 drives the connecting block 54 to move to the side far away from, the upper calibration ring 8 drives the second driving mechanism 7 to move, so that the lower calibration ring 6 and the upper calibration ring 8 perform smoothing treatment on the convex surface of the upper part of the outer tube body.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An adjustable roundness calibration device of a full-glass vacuum solar heat collection tube comprises a fixed cylinder (1) and is characterized in that a support table (2) is fixedly connected to the lower end of the fixed cylinder (1), a circular through hole (13) is formed in the fixed cylinder (1), a first limiting groove (11) is formed in the fixed cylinder (1) and located below the circular through hole (13), a first strip-shaped opening is formed between the first limiting groove (11) and the circular through hole (13) in a penetrating manner, a first driving mechanism (5) is arranged in the first limiting groove (11), the upper end of the first driving mechanism (5) penetrates through the first strip-shaped opening and extends into the circular through hole (13) and is fixedly connected with a lower calibration ring (6), a second limiting groove (10) is formed in the fixed cylinder (1) and located above the circular through hole (13), and a second strip-shaped opening is formed between the second limiting groove (10) and the circular through hole (13), second actuating mechanism (7) are provided with in second spacing groove (10) inside, second actuating mechanism (7) lower extreme passes second bar opening and extends to circular through-hole (13) inside and fixedly connected with and goes up calibration ring (8), go up calibration ring (8) and calibration ring (6) joint down, fixed cylinder (1) inside just is located second spacing groove (10) top and has seted up spout (9), run through between spout (9) and second spacing groove (10) and has seted up third bar opening, fixed cylinder (1) both ends just are located circular through-hole (13) top and all are provided with stop gear (3), and are a pair of both sides all are provided with fixed establishment (4), four around stop gear (3) fixed establishment (4) two bisymmetry settings are at fixed cylinder (1) both ends.

2. The adjustable roundness calibration device of the all-glass vacuum solar heat collection tube according to claim 1, wherein the first driving mechanism (5) comprises a servo motor (51), the servo motor (51) is fixedly connected to one end of the fixed cylinder (1) through a fixed frame (52), an output end of the servo motor (51) extends into the first limiting groove (11) and is fixedly connected with a lead screw (53), one end of the lead screw (53) far away from the servo motor (51) is rotatably connected to an inner wall of one side of the first limiting groove (11) far away from the servo motor (51) through a bearing, a connecting block (54) is in threaded sleeve connection with the lead screw (53), a plurality of first rollers (55) are fixedly connected to the lower end of the connecting block (54), and the lower ends of the plurality of first rollers (55) are all in contact with the inner wall of the first limiting groove (11), the upper end of the connecting block (54) is fixedly connected with a straight rod (56), and the upper end of the straight rod (56) penetrates through the first strip-shaped opening to extend to the inside of the circular through hole (13) to be fixedly connected with the lower calibration ring (6).

3. The adjustable roundness calibration device of the all-glass vacuum solar heat collection tube according to claim 1, it is characterized in that the second driving mechanism (7) comprises a hydraulic cylinder (71), the output end of the hydraulic cylinder (71) is fixedly connected with a connecting rod (73), the lower end of the connecting rod (73) passes through the second strip-shaped opening, extends to the inside of the circular through hole (13) and is fixedly connected with a U-shaped plate (74), the lower end of the U-shaped plate (74) is fixedly connected with the upper calibration ring (8), the upper end of the hydraulic cylinder (71) is fixedly connected with a sliding mechanism (72), the upper end of the sliding mechanism (72) passes through the third strip-shaped opening, extends into the sliding groove (9) and is connected with the sliding groove (9) in a sliding way, pneumatic cylinder (71) lower extreme fixedly connected with a plurality of second gyro wheels (75), a plurality of second gyro wheel (75) lower extreme all contacts with the bottom wall in second spacing groove (10).

4. The adjustable roundness calibration device for all-glass vacuum solar collector tubes according to claim 3, wherein the sliding mechanism (72) comprises a sliding rod (721) and a sliding block (722), the sliding rod (721) is fixedly connected to the upper end of the hydraulic cylinder (71), the upper end of the sliding rod (721) passes through the third strip-shaped opening to extend into the chute (9) and is fixedly connected with the sliding block (722), and the sliding block (722) is slidably connected with the chute (9).

5. The adjustable roundness calibration device for all-glass vacuum solar collector tubes according to claim 1, wherein the limiting mechanism (3) comprises an L-shaped rod (31), the L-shaped rod (31) is fixedly connected with the fixed cylinder (1), and the lower end of the L-shaped rod (31) is fixedly connected with the fixed ring (32).

6. The adjustable roundness calibration device for the all-glass vacuum solar collector tube according to claim 5, wherein the fixing mechanism (4) comprises a fixing plate (43), the fixing plate (43) is fixedly connected with the fixing cylinder (1), a threaded pipe (44) is fixedly connected to one side of the fixing plate (43) close to the circular through hole (13), a threaded rod (42) is connected to the inner thread of the threaded pipe (44), one end of the threaded rod (42) far away from the circular through hole (13) penetrates through the fixing plate (43) and is fixedly connected with a rotating handle (41), and one end of the threaded rod (42) close to the circular through hole (13) penetrates through the side wall of the fixing ring (32) and extends to the inside of the fixing ring (32) and is rotatably connected with a semi-ring (45).

7. The adjustable roundness calibration device for the all-glass vacuum solar heat collection tube according to claim 1, wherein both sides of the lower end of the upper calibration ring (8) are fixedly connected with a fixed block (81), the lower end of the fixed block (81) is fixedly connected with a pair of limiting frames (82), the inner wall of one side, close to each other, of the pair of limiting frames (82) is fixedly connected with a spring (83), the other end of the spring (83) is fixedly connected with a clamping block (84), both sides of the upper end of the upper and lower calibration rings (6) are respectively provided with a clamping groove (61), the clamping block (84) is clamped with the clamping groove (61), the clamping block (84) is U-shaped, and the clamping groove (61) is T-shaped.

8. The adjustable roundness calibrating device for the all-glass vacuum solar heat collecting tube according to claim 1, wherein two sides of the lower end of the lower calibrating ring (6) are fixedly connected with supporting rods (14), the lower ends of the supporting rods (14) are fixedly connected with sliding pads (12), and the sliding pads (12) are in contact with the inner walls of the circular through holes (13).