Internal pressure test furnace, its lifting mechanism and furnace lifting method under fault condition

Abstract

The application relates to testing or analyzing materials by measuring the chemical or physical properties of the materials, and particularly relates to an internal pressure test furnace for a hot chamber and a lifting mechanism thereof and a lifting method under a fault condition. The lifting mechanism comprises a worm gear, a transmission assembly and a worm. The transmission assembly is matched with the worm gear and a furnace body of the internal pressure test furnace, and is used for converting the rotating motion of the worm gear into the lifting motion of the furnace body. The worm is operable in an engagement position engaged with the worm gear and a disengagement position disengaged from the worm gear, wherein when a driving device driving the furnace body to lift is in a fault condition, the worm is operable in the engagement position to drive the furnace body to lift by the worm, the worm gear and the transmission assembly. The lifting mechanism of the embodiment of the application facilitates manual furnace opening by a manipulator when the internal pressure test furnace in the hot chamber is in the fault condition.

Description

TECHNICAL FIELD

[0001] The present application relates to testing or analyzing materials by means of determining chemical or physical properties of the materials, and in particular to an internal pressure test furnace used in a hot cell, a lifting mechanism thereof, and a furnace lifting method in a fault condition. BACKGROUND

[0002] The internal pressure test furnace used in a hot cell generally comprises a base and a furnace body which is coverably and liftable on the base. Since the hot cell is radioactive, the internal pressure test furnace used in the hot cell is driven by a motor to lift the furnace body. When the motor fails, the internal pressure test furnace cannot be normally opened, which affects the test. SUMMARY

[0003] In view of the above technical problems, the present application provides an internal pressure test furnace used in a hot cell, a lifting mechanism thereof, and a furnace lifting method in a fault condition, so as to lift the furnace body in the fault condition.

[0004] In a first aspect, the present application provides a lifting mechanism of an internal pressure test furnace used in a hot cell, comprising:

[0005] a worm gear;

[0006] a transmission assembly, which is used to convert the rotating motion of the worm gear into the lifting motion of the furnace body, and is in cooperation with the worm gear and the furnace body of the internal pressure test furnace; and

[0007] a worm, which is in an engaged position in cooperation with the worm gear and a disengaged position separated from the worm gear, wherein when the driving device for lifting the furnace body is in a fault condition, the worm is in the engaged position to drive the furnace body to rise by the worm, the worm gear and the transmission assembly.

[0008] In a second aspect, the present application provides an internal pressure test furnace used in a hot cell, comprising:

[0009] a base;

[0010] a furnace body, which is movable up and down relative to the base to be connected with or separated from the base; and

[0011] the lifting mechanism of the first aspect of the present application is used to drive the furnace body to move up and down relative to the base.

[0012] In a third aspect, the present application provides a furnace lifting method in a fault condition of an internal pressure test furnace used in a hot cell, comprising:

[0013] sliding the worm of the internal pressure test furnace to an engaged position in cooperation with the worm gear by a manipulator;

[0014] locking the worm in the engaged position by the manipulator;

[0015] The mechanical arm rotates the worm to drive the worm to rotate the worm gear, thereby driving the furnace body of the internal pressure test furnace to rise.

[0016] The lifting mechanism of the embodiment of the present application is convenient for manually opening the furnace by the mechanical arm when the internal pressure test furnace in the hot chamber is in a fault condition. BRIEF DESCRIPTION OF DRAWINGS

[0017] Other objects and advantages of the present application will become apparent and help to understand the present application from the following description of the present application with reference to the accompanying drawings.

[0018] Figure 1 is a structural schematic view of an internal pressure test furnace according to an embodiment of the present application, in which the worm gear is omitted;

[0019] Figure 2 is Figure 1 is another angle of the internal pressure test furnace shown in the structural schematic view;

[0020] Figure 3 is Figure 2 is a partial enlarged view of the A area shown in the structural schematic view;

[0021] Figure 4 is Figure 1 is another angle of the internal pressure test furnace shown in the structural schematic view, in which the worm gear is shown;

[0022] Figure 5 is Figure 4 is a partial bottom view of the internal pressure test furnace shown in the structural schematic view;

[0023] Figure 6 is Figure 5 is a side view of the structure shown in the structural schematic view; and

[0024] Figure 7 is a structural schematic view of an operating part according to an embodiment of the present application.

[0025] It should be noted that the drawings are not necessarily drawn to scale, but are only shown in a schematic manner without affecting the understanding of the reader.

[0026] EXPLANATION OF REFERENCE NUMERALS:

[0027] 100, internal pressure test furnace; 11, base; 12, furnace body;

[0028] 21, worm gear; 22, worm; 221, joint; 23, sliding part; 231, positioning hole; 24, locking part; 25, operating part; 251, handle; 252, joint;

[0029] 31, support rod; 32, support plate; 33, sliding block;

[0030] 41, screw shaft; 42, ball nut; 43, driving device; 44, connecting piece. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are one embodiment of the present application, rather than all embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0032] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the common meanings understood by those of ordinary skill in the art to which the present application belongs.

[0033] In the description of the embodiments of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0034] Referring to Figures 1 to 4 The internal pressure test furnace 100 of the embodiment of the present application comprises a base 11, a furnace body 12 and a lifting mechanism. The furnace body 12 is movable up and down relative to the base 11 to be connected with the base 11 or separated from the base 11. The lifting mechanism is used to drive the furnace body 12 to move up and down relative to the base 11.

[0035] The internal pressure test furnace 100 of the embodiment of the present application is used in a hot cell. It is easy to understand that, since the hot cell is radioactive, it is not suitable for operators to enter, therefore, when the internal pressure test furnace 100 in the hot cell fails and cannot be opened, the operator can only use a mechanical hand to perform the opening operation. It is easy to understand that, here, the internal pressure test furnace 100 fails and cannot be opened, usually refers to that the motor driving the furnace body 12 of the internal pressure test furnace 100 to lift fails, such as power failure or motor damage, resulting in automatic opening failure.

[0036] Therefore, the embodiment of the present application provides a lifting mechanism suitable for being operated by a mechanical hand in a hot cell, so as to use the mechanical hand to operate to lift the furnace body 12 in a failure condition.

[0037] Referring to Figures 4 to 6 The lifting mechanism of the embodiment of the present application comprises a worm gear 21, a transmission assembly and a worm 22.

[0038] The transmission assembly cooperates with the worm gear 21 and the furnace body 12 of the internal pressure test furnace 100 at the same time, and is used to convert the rotary motion of the worm gear 21 into the lifting motion of the furnace body 12.

[0039] The worm 22 is operable in an engaged position in which the worm 22 is engaged with the worm wheel 21 and a disengaged position in which the worm 22 is disengaged from the worm wheel 21. When the driving device 43 for driving the furnace body 12 to move up and down is in a failure condition, the worm 22 is operated by the mechanical arm in the hot chamber to be in the engaged position, so that the furnace body 12 is driven to move up by the worm 22, the worm wheel 21 and the transmission assembly.

[0040] Therefore, when the internal pressure test furnace 100 in the hot chamber fails and cannot be opened, the worm 22 can be engaged with the worm wheel 21 by the mechanical arm, so that the worm 22 is rotated by the mechanical arm, the worm wheel 21 is rotated by the worm 22, and the furnace body 12 is driven to move up by the transmission assembly.

[0041] In some embodiments, the worm 22 and the worm wheel 21 have a self-locking function. That is, only the worm wheel 21 can be driven to rotate by the worm 22, and the worm 22 cannot be driven to rotate by the worm wheel 21. Therefore, when the furnace body 12 is driven to move up by the worm 22, the furnace body 12 can be prevented from falling down due to the self-locking function of the worm 22 and the worm wheel 21.

[0042] When the driving device 43 for driving the furnace body 12 to move up and down is in a normal condition, that is, the driving device 43 can drive the furnace body 12 to move up and down normally, the worm 22 is operated by the mechanical arm to be in the disengaged position from the worm wheel 21, so that the furnace body 12 is driven to move up and down by the driving device 43. During the process of driving the furnace body 12 to move up and down normally by the driving device 43, the worm 22 is disengaged from the worm wheel 21, so that the driving device 43 can drive the furnace body 12 to move up and down normally.

[0043] In some embodiments, the transmission assembly comprises a lead screw shaft 41 and a ball nut 42. The lead screw shaft 41 is arranged to rotate coaxially and synchronously with the worm wheel 21. That is, when the worm wheel 21 rotates, the lead screw shaft 41 can be driven to rotate, and when the lead screw shaft 41 rotates, the worm wheel 21 can also be driven to rotate.

[0044] In some embodiments, referring to Figure 6 , the lead screw shaft 41 is connected with the worm wheel 21 by a connecting piece 44. It is easy to understand that the lead screw shaft 41 is relatively stationary with the worm wheel 21, and both of them rotate at the same time or are stationary at the same time. In some embodiments, the lead screw shaft 41 can also be integrally formed or welded with the worm wheel 21.

[0045] The ball nut 42 is connected with the furnace body 12 and is used to move along the axial direction of the lead screw shaft 41 when the lead screw shaft 41 rotates, so as to drive the furnace body 12 to move up or down. It is easy to understand that the lead screw shaft 41 and the ball nut 42 together constitute a ball screw.

[0046] In some embodiments, the driving device 43 cooperates with the screw shaft 41 to drive the screw shaft 41 to rotate and drive the furnace body 12 to ascend or descend in normal condition. When the driving device 43 is in normal condition, the worm 22 is in disengaged position and is operable to drive the screw shaft 41 to rotate and drive the furnace body 12 to ascend or descend, and the worm wheel 21 is rotatable with the screw shaft 41. When the driving device 43 is in failure condition, the worm 22 is in engaged position and is operable to drive the screw shaft 41 to rotate and drive the furnace body 12 to ascend.

[0047] The driving device 43 can be a servo motor.

[0048] In other embodiments, the driving device 43 drives the furnace body 12 to ascend or descend through other transmission components in normal condition. In other words, in some other embodiments, there is no connection between the driving device 43 and the transmission components of the lifting mechanism, and the lifting mechanism is only used to lift the furnace body 12 when the driving device 43 is in failure condition.

[0049] Referring to Figure 7 The lifting mechanism can further include an operating part 25. The operating part 25 is detachably connected with the worm 22 and is used for being gripped by the robot hand to facilitate the robot hand to rotate the worm 22.

[0050] One end of the worm 22 is provided with a first joint 221 having a first matching surface. The operating part includes a handle 251 and a second joint 252 having a second matching surface matched with the first matching surface, so that the worm 22 is driven to rotate by the handle 251 through the cooperation of the first matching surface and the second matching surface.

[0051] In some embodiments, one of the first joint 221 and the second joint 252 is an inner square joint, and the other is an outer square joint. The worm 22 is driven to rotate by the handle 251 through the cooperation of the inner square joint and the outer square joint.

[0052] The operating part 25 can be detached from the worm 22 in normal condition and placed beside the internal pressure test furnace 100. When the internal pressure test furnace 100 encounters a lifting failure, the handle 251 is manually operated by the robot hand to be clamped and sleeved on the square joint at the end of the worm 22.

[0053] In some embodiments, the lifting mechanism further includes a plurality of support rods 31. The support rods 31 extend vertically upward from the base 11 of the internal pressure test furnace 100. The furnace body 12 is vertically and slidably arranged on at least one support rod 31 through a sliding block 33. By arranging the support rods 31 and the sliding block 33, the stability of the lifting structure is improved.

[0054] In some embodiments, the lifting mechanism further includes a support plate 32 and a sliding part 23.

[0055] Referring to Figure 2 and Figure 3 The support plate 32 is supported by a plurality of support rods 31. The support plate 32 can be arranged at the top end of the support rods 31.

[0056] The worm 22 is slidingly arranged on the support plate 32 by a sliding part 23. The sliding part 23 is driven to slide relative to the support plate 32 by the mechanical hand, so that the worm 22 is in the disengaged position or the engaged position.

[0057] The support plate 32 can have a horizontal part and a vertical part extending from the middle of the horizontal part. The horizontal part and the vertical part form a T shape. The two ends of the horizontal part are respectively supported by a support rod 31, and the end of the vertical part away from the horizontal part is supported by two support rods 31. The two support rods 31 supporting the two ends of the horizontal part are respectively slidably connected to the furnace body 12 through a sliding block 33.

[0058] The worm wheel 21 is arranged at the end of the vertical part away from the horizontal part. The sliding part 23 is slidingly sleeved on the vertical part.

[0059] The lifting mechanism further comprises a locking part 24. The locking part 24 is used to lock the sliding part 23 when the worm 22 is in the engaged position, so as to keep the worm 22 in the engaged position and ensure that the worm 22 continuously engages with the worm wheel 21.

[0060] In some embodiments, the locking part 24 is a positioning pin. The support plate 32 is provided with a first positioning hole, and the sliding part 23 is provided with a positioning hole 231. When the worm 22 is in the engaged position, the first positioning hole is aligned with the positioning hole 231, and the positioning pin is inserted into the first positioning hole and the positioning hole 231 by the mechanical hand, so as to lock the sliding part 23 and the support plate 32, thereby keeping or locking the worm 22 in the engaged position.

[0061] In some embodiments, the support plate 32 is further provided with a second positioning hole. When the worm 22 is in the disengaged position, the second positioning hole is aligned with the positioning hole 231, and the positioning pin is inserted into the second positioning hole and the positioning hole 231 by the mechanical hand, so as to lock the sliding part 23 and the support plate 32, thereby keeping or locking the worm 22 in the disengaged position.

[0062] In some embodiments, the first positioning hole and the second positioning hole can be arranged on the plate body of the support plate 32 in the vertical direction. In some embodiments, the first positioning hole and the second positioning hole can be arranged on the plate body of the support plate 32 in a direction parallel to the axial direction of the worm 22.

[0063] The worm 22 is arranged below the sliding part 23, and the worm wheel 21 is arranged below the support plate 32, so as to facilitate the engagement of the worm 22 and the worm wheel 21. The driving device 43 can be arranged above the support plate 32 for driving the worm wheel 21 and the lead screw shaft 41. The lead screw shaft 41 can extend downward to the base 11.

[0064] The end of the positioning pin can be provided with a ring part to facilitate the operation of the manipulator.

[0065] When the internal pressure test furnace 100 is normally used, the sliding part 23 is located at the initial position (i.e., the worm 22 is at the disengaged position), and the worm gear 21 and the worm 22 are in the disengaged state. When the lifting failure occurs in the furnace body 12, the manipulator is manually operated to pull the ring part on the side of the sliding part 23, so as to pull the positioning pin out of the positioning hole 231 and the second positioning hole, and then the sliding part 23 is pushed forward to the butt joint position (i.e., the worm 22 is at the engaged position), and the worm gear 21 and the worm 22 are butt jointed, and then the positioning pin is inserted back into the positioning hole 231 and the first positioning hole. Then, the handle 251 is clamped and sleeved on the square joint at the end of the worm 22 by manually operating the manipulator, the handle 251 is rotated by using the manipulator, and the furnace body 12 is manually lifted by using the transmission of the worm 22 and the worm gear 21, and the self-locking function of the worm gear and the worm can ensure that the furnace body 12 will not fall during the manual lifting.

[0066] Therefore, it can be seen that the lifting mechanism of the present application is convenient for the operation of the manipulator, and is particularly suitable for being applied to the internal pressure test furnace 100 in the hot cell.

[0067] The embodiment of the present application also provides an internal pressure test furnace 100 used in a hot cell. The internal pressure test furnace 100 comprises a base 11, a furnace body 12, and the lifting mechanism of any one of the embodiments of the present application. The furnace body 12 is movable up and down relative to the base 11 to be connected with the base 11 or separated from the base 11. The lifting mechanism is used to drive the furnace body 12 to move up and down relative to the base 11.

[0068] In some embodiments, the internal pressure test furnace 100 can be an internal pressure creep furnace. In other embodiments, the internal pressure test furnace 100 can be an internal pressure burst furnace.

[0069] The embodiment of the present application also provides a method for lifting the furnace under the failure condition of the internal pressure test furnace in the hot cell, which comprises the following steps 1 to 3.

[0070] Step 1, sliding the worm 22 of the internal pressure test furnace 100 to the engaged position by using the manipulator, so that the worm 22 is engaged with the worm gear 21.

[0071] Step 2, locking the worm 22 at the engaged position by using the manipulator.

[0072] Step 3, rotating the worm 22 by using the manipulator, so that the worm 22 drives the worm gear 21 to rotate, and thus drives the furnace body 12 of the internal pressure test furnace 100 to rise.

[0073] For the embodiments of the present application, it also needs to be explained that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0074] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A lifting mechanism for a hot cell internal pressure test furnace, characterized by, The inner pressure test furnace (100) comprises: a worm wheel (21); a transmission assembly, which is in cooperation with the worm wheel (21) and a furnace body (12) of the inner pressure test furnace (100), and is used for converting the rotating motion of the worm wheel (21) into the lifting motion of the furnace body (12); a worm (22), which is operable in an engaged position in meshing with the worm wheel (21) and a disengaged position out of meshing with the worm wheel (21), wherein the worm (22) is operable in the engaged position to drive the furnace body (12) to rise by the worm (22), the worm wheel (21) and the transmission assembly when a driving device (43) for driving the furnace body (12) to lift is in a fault condition; a plurality of support rods (31), which extend vertically upward from a base (11) of the inner pressure test furnace (100), and the furnace body (12) is slidably arranged on at least one of the support rods (31) in a vertical direction by a sliding block (33); a support plate (32), which is supported by the plurality of support rods (31); a sliding part (23), in which the worm (22) is slidably arranged on the support plate (32) so as to be driven to slide relative to the support plate (32) by a robot to make the worm (22) be in the disengaged position or the engaged position; the support plate (32) has a horizontal part and a vertical part extending from a middle part of the horizontal part, the horizontal part and the vertical part form a T shape, two ends of the horizontal part are respectively supported by one of the support rods (31), and an end of the vertical part away from the horizontal part is supported by two of the support rods (31); the two support rods (31) supporting the two ends of the horizontal part are respectively slidably connected with the furnace body (12) by the sliding blocks; the worm wheel (21) is arranged at the end of the vertical part away from the horizontal part, and the sliding part (23) is slidably sleeved on the vertical part.

2. The lifting mechanism of claim 1, wherein, The transmission assembly comprises: a lead screw shaft (41), which is arranged to rotate coaxially and synchronously with the worm wheel (21); and a ball nut (42), which is connected with the furnace body (12) and is used for moving along the axial direction of the lead screw shaft (41) to drive the furnace body (12) to rise or fall when the lead screw shaft (41) rotates.

3. The lifting mechanism of claim 2, wherein, The driving device (43) is in cooperation with the lead screw shaft (41) to drive the lead screw shaft (41) to rotate and drive the furnace body (12) to lift in a normal condition; wherein the worm (22) is operable in the disengaged position when the driving device (43) is in the normal condition.

4. The lifting mechanism of claim 2, wherein, The driving device (43) is a servo motor.

5. The lift mechanism of claim 2, wherein, The lead screw shaft (41) is connected with the worm wheel (21) by a connecting piece (44).

6. The lift mechanism of claim 1, wherein, Further comprising: an operating part (25), which is detachably connected with the worm (22) and is used for being gripped by the robot to facilitate the robot to rotate the worm (22).

7. The lifting mechanism according to claim 6, wherein one end of the worm (22) is provided with a first joint (221), the first joint (221) has a first matching surface, The operation part comprises a handle (251) and a second joint (252) having a second mating surface matching the first mating surface to realize the rotation of the worm (22) driven by the handle (251) through the cooperation of the first and second mating surfaces.

8. The lift mechanism of claim 1, wherein, Further comprising: A locking part (24) for locking the sliding part (23) when the worm (22) is in the engaged position.

9. The lifting mechanism according to claim 8, characterized in that, The locking part (24) is a positioning pin, The support plate (32) and the sliding part (23) are respectively provided with positioning holes, and the positioning pin is inserted into the positioning holes of the support plate (32) and the sliding part (23) by a mechanical hand when the worm (22) is in the engaged position.

10. The lift mechanism of claim 1, wherein, The worm (22) and the worm gear (21) have a self-locking function; When the driving device (43) driving the furnace body (12) to lift is in normal working condition, the worm (22) is operated by a mechanical hand in the hot chamber to make the worm (22) in the disengaged position, so that the furnace body (12) is driven to lift by the driving device (43).

11. An internal pressure test furnace for use in a hot cell, characterized by Comprising: A base (11); A furnace body (12) movable up and down relative to the base (11) to be connected with or separated from the base (11); And The lifting mechanism according to any one of claims 1 to 10 for driving the furnace body (12) to move up and down relative to the base (11).

12. A method of raising a furnace in a fault condition of an internal pressure test furnace in a hot cell, characterized by, The internal pressure test furnace is the internal pressure test furnace according to claim 11, and the method comprises: Sliding the worm (22) of the internal pressure test furnace (100) to the engaged position engaged with the worm gear (21) by a mechanical hand; Locking the worm (22) in the engaged position by a mechanical hand; Rotating the worm (22) by a mechanical hand to drive the worm gear (21) to rotate, thereby driving the furnace body (12) of the internal pressure test furnace (100) to rise.

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