Downward guiding pipe device of multi-station descent method equipment

Abstract

The utility model discloses a down-leading pipe device for multi-station descent method equipment. The down-leading pipe device comprises a thermocouple positioning assembly, a down-leading pipe and a base. The base comprises a front side plate, a bottom plate and a rear side plate, and the front side plate, the bottom plate and the rear side plate are sequentially connected to form a U shape; a rectangular-ambulatory-plane positioning clamping groove is formed in the center of the bottom plate and used for being connected with a leading-down pipe in an inserted mode; a through hole is formed in the down-leading pipe positioning block, and a positioning rod is fixedly connected to the lower part of the through hole; the thermocouple positioning assembly comprises a hollow sleeve, and the hollow sleeve penetrates into the down-leading pipe through the through hole and moves up and down in the down-leading pipe; and a transverse positioning pin is arranged on the positioning rod and is used for locking the position of the hollow sleeve in the down-leading pipe. According to the utility model, the thermocouple positioning assembly is matched and connected with the base, so that the position and height stability of the thermocouple is realized, and the consistency and repeatability of a multi-station crystal growth environment are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to crystal growth technical field, concretely relates to a lead -down tube device for multi -position descending method crystal growing furnace. BACKGROUND

[0002] Multi -crucible descending method preparation technology can grow 10-30 crystal rods simultaneously along with equipment station quantity and crystal size, has the technical advantage and cost advantage that other crystal growth technology cannot compare, wherein the lead -down tube device as the key component in multi -crucible descending method equipment, the design precision and adjustability have very remarkable influence to the stability and consistency of industrial growth crystal.

[0003] The current lead -down tube device configuration is relatively simple, is divided into base, lead -down tube and thermocouple etc., wherein the lead -down tube adopts the mode fixed in the base with positioning bolt plus steel saw blade, the single side of base is opened a small hole, the thermocouple is convenient for from the base to the temperature measuring probe on the base outside connection. The problems found in the use of the device have the following points: one, the position and height of thermocouple are not fixed, and the repeatability of tube site temperature field can exist greater error;Two, the gap exists in the part of thermocouple and base connection, and the alumina insulation powder can leak to the optical platform and descending mechanism when loading, which has certain influence on production environment and equipment life;Three, the height adjustment of thermocouple is relatively cumbersome (need to reassemble). Therefore, it is necessary to make certain technical improvement to the existing lead -down tube device to realize the relative fixation of the position and height of thermocouple and have certain adjustability, at the same time, improve the connection mode of thermocouple and base, prevent the leakage of alumina insulation powder in the middle process, and realize the relative stability of production environment. UTILITARIAN CONTENT

[0004] In view of the above-mentioned deficiencies of the prior art, the purpose of the utility model is to realize the stability and high-precision adjustment of crystal growth environment temperature field control through the design of a lead -down tube device of multi -position descending method equipment.

[0005] In order to realize the above-mentioned purpose, the technical scheme provided by the utility model is as follows: a lead -down tube device of multi -position descending method equipment includes thermocouple positioning assembly, lead -down tube and base;The base includes front side plate, bottom plate and rear side plate, and the front side plate, bottom plate and rear side plate are sequentially connected to form a U type;The center of bottom plate is provided with a lug as a lead -down tube positioning block, and the periphery of lead -down tube positioning block is provided with a back-shaped positioning slot for inserting lead -down tube;The lead -down tube positioning block is provided with a through hole, and the through hole is fixedly connected with a positioning rod below;The thermocouple positioning assembly includes a hollow sleeve, which is inserted into the lead -down tube through the through hole and moves up and down in the lead -down tube;The positioning rod is provided with a transverse positioning pin, which locks the position of the hollow sleeve in the lead -down tube.

[0006] In one preferred embodiment, the through hole is a threaded hole, and the outer surface of the pipe joint of the hollow sleeve has a threaded section that is connected with the threaded hole. More specifically, the hollow sleeve is a hollow screw, and the lower end is connected with a matching threaded sleeve, and rotating the threaded sleeve can move the hollow sleeve up and down in the downcomer.

[0007] Preferably, the height of the positioning slot is 20 mm.

[0008] Preferably, the gap between the positioning slot and the downcomer is controlled to be 0.6-1.0 mm.

[0009] In one preferred embodiment, the front side plate and the rear side plate of the base are provided with downcomer fixing holes, and an internal hexagonal bolt is inserted into the fixing hole and abuts against the downcomer.

[0010] Further, the front side plate or the rear side plate of the base is provided with a thermocouple interface to realize electrical connection with the thermocouple.

[0011] Further, the lower side of the base is fixedly connected with the lifting platform through a base connecting assembly.

[0012] Preferably, the top end of the hollow sleeve is 420 mm away from the lifting platform.

[0013] The beneficial effects of the structure of the utility model mainly lie in: realizing high-precision adjustability and perpendicularity of the position of the thermocouple, and repeatability and consistency of the position of the thermocouple in the downcomer, and guaranteeing the repeatability and consistency of the temperature field of each downcomer device. In addition, through the downcomer positioning block and the positioning slot, the perpendicularity between the downcomer and the base and the leakage of the heat preservation powder are solved, and the production environment and the production device are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model.

[0015] Figure 2 It is a schematic view of the connection of the base and the thermocouple positioning assembly of the utility model.

[0016] Figure 3 It is a top view of the utility model.

[0017] Figure 4 It is a side view of the utility model.

[0018] Figure 5 It is a comparison schematic view of the utility model and the prior art.

[0019] Reference signs: 1, base; 2, thermocouple positioning assembly; 3, downcomer;

[0020] 11. Front side plate; 12. Base plate; 13. Rear side plate; 14. Down-lead tube positioning block; 15. Positioning slot; 16. Through hole; 17. Positioning rod; 18. Positioning pin; 19. Down-lead tube fixing hole; 20. Thermocouple interface; 21. Hollow sleeve; 22. Base connecting assembly; 23. Socket head cap screw; 24. Threaded sleeve Detailed Implementation

[0021] To better understand the technical solution of this utility model, the embodiments of this utility model are described in detail below with reference to specific examples. It should be understood that the described embodiments are merely some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] The terminology used in the embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. The singular forms “a,” “the,” and “the” used in the embodiments of this utility model and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. The test materials used in this utility model are all common commercially available products.

[0023] In existing technologies, the down-leading pipe device has a relatively simple structure and incomplete functionality, with the following disadvantages: ① The position and height of the thermocouple are prone to fluctuation, thus affecting the repeatability and consistency of the pipe position; for example... Figure 5 As shown, the position of the thermocouple (represented by A1 in the figure) changes each time it is installed. ② There is a gap at the connection between the thermocouple and the base, which can easily cause leakage of insulation powder, thereby polluting the production environment and affecting the life of the mechanism; ③ Adjusting the height of the thermocouple is relatively cumbersome.

[0024] Reference Figures 1 to 5 The diagram illustrates a down-lead tube device in a multi-station descent equipment. This device comprises several parts: a thermocouple positioning assembly 2, a down-lead tube 3, and a base 1. The base 1 includes a front side plate 11, a bottom plate 12, and a rear side plate 13, which are sequentially connected to form a U-shape. A protrusion at the center of the bottom plate 12 serves as a down-lead tube positioning block 14. The periphery of the down-lead tube positioning block 14 has a U-shaped positioning groove 15 for inserting the down-lead tube 3. The down-lead tube positioning block 14 has a through hole 16, below which a positioning rod 17 is fixedly connected. An S-type thermocouple enters the down-lead tube 3 through the through hole 16. (See also...) Figure 3 The top view of this utility model and Figure 4 Side view.

[0025] The thermocouple positioning assembly 2 comprises a hollow sleeve 21 which can protect the thermocouple and adjust the position of the thermocouple. The hollow sleeve 21 is inserted into the downcomer 3 through the through hole 16 and moves up and down in the downcomer 3. Further, the transverse positioning pin 18 is arranged on the positioning rod 17 and locks the position of the hollow sleeve 21 in the downcomer 3.

[0026] Figure 2 The base 1 of the utility model is connected with the thermocouple positioning assembly 2. The positioning rod 17, the positioning pin 18 and the hollow sleeve 21 constitute the thermocouple positioning assembly 2. The thermocouple positioning assembly 2 can realize that the thermocouple is perpendicular to the base 1, guarantees the repeatability and consistency of the thermocouple in the position of the downcomer 3, and can realize the effective adjustment of the height of the thermocouple in the downcomer 3 through the directional adjustment mode, and realizes the unity of the height of the thermocouple in all downcomers 3.

[0027] In one preferred embodiment, the through hole 16 is a threaded hole, and the outer surface of the pipe joint of the hollow sleeve 21 has an adjusting threaded section which is connected with the threaded hole. Preferably, the hollow sleeve 21 is a hollow screw rod, the lower end of which is connected with a matched threaded sleeve 24, and the threaded sleeve 24 is rotated to realize the up and down movement of the hollow sleeve 21 in the downcomer 3.

[0028] Preferably, the height of the positioning clamping groove 15 on the bottom plate 12 is 20 mm. The bottom end of the downcomer 3 is directly placed on the positioning clamping groove 15 of the base 1, the centering and perpendicularity are adjusted, and then the downcomer 3 is fixedly connected with the base 1 through the fixing assembly. Preferably, the gap between the positioning clamping groove 15 and the downcomer 3 is controlled to be 0.6-1.0 mm. The gap part is filled with glass glue, which can effectively prevent the heat preservation powder in the downcomer 3 from leaking to the base 1 and then spreading to the transmission assembly of the multi-station descending method equipment, thereby affecting the service life of the equipment.

[0029] In one preferred embodiment, the front side plate 11 and the rear side plate 13 of the base 1 are provided with downcomer fixing holes 19, and the internal hexagonal bolts 23 are inserted into the downcomer fixing holes 19 and abut against the downcomer 3, further fixing the downcomer 3.

[0030] Further, the front side plate 11 or the rear side plate 13 of the base 1 is provided with a thermocouple interface 20 to realize the electrical connection with the thermocouple.

[0031] Further, the bottom of the base 1 is fixedly connected with a lifting platform (not shown in the figure) through a base connecting assembly 22.

[0032] Detailed Implementation: Taking the multi-crucible descent method for BGO crystal (bismuth germanate crystal) growth as an example, 10-12 sets of the high-precision down-lead tube devices of this invention are required for BGO crystal growth. The installation method for a single set of high-precision down-lead tube devices is as follows: First, insert the thermocouple into the hollow sleeve 21, and install the hollow sleeve 21 onto the through hole 16 of the base 1. Use the positioning rod 17 and positioning pin 18 to lock the height. Use tools such as a laser level for vertical correction. The gap between the thermocouple and the thermocouple positioning component 2 is filled with glass glue to prevent alumina insulation powder from leaking into the external environment. By adjusting the up and down movement of the hollow sleeve 21, the height of the thermocouple is uniformly set to the height H at the bottom of the base 1, i.e., the distance from the top of the thermocouple to the lifting platform, i.e., the height H at the base connection component 22 at the bottom of the base 1. Figure 1 The diameter (H indicates 420mm) is used to place the ceramic down-lead tube 3, after flattening, into the down-lead tube positioning slot 15. The surrounding area is filled with silicone sealant. Simultaneously, the upper part of the base is secured to the down-lead tube 3 using hexagonal bolts. After installation, an S-type thermocouple is connected to the thermocouple interface 20 on the base 1 to achieve crystal growth temperature measurement for each down-lead tube device during crystal growth. Once all down-lead tube devices are installed, the BGO crystal loading process is complete.

[0033] This invention introduces a thermocouple positioning component 2 to achieve a detachable and adjustable connection between the thermocouple and the base. This allows for adjustable thermocouple height while ensuring the thermocouple remains perpendicular to the base, preventing its position from easily changing. Figure 5 As shown in A2, the thermocouple is always installed at position A2. Simultaneously, by adding a corresponding locking device (positioning slot 15) to the base 1, the bottom end of the down-lead tube 3 is directly placed in the positioning block of the base 1, adjusting the centering and verticality, thus solving the problem of insulation powder leakage caused by the verticality of the down-lead tube 3 on the base 1 and the gap between the base 1 and the down-lead tube 3.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dropper device for a multi-station drop method apparatus, characterized in that, The thermocouple positioning assembly, downcomer and base; the base includes front side plate, bottom plate and rear side plate, the front side plate, bottom plate and rear side plate are sequentially connected to form U type;The bottom plate is provided with a protrusion as a downcomer positioning block in the center, the downcomer positioning block is provided with a positioning slot on the periphery, which is used for inserting the downcomer;The downcomer positioning block is provided with a through hole, and the through hole is fixedly connected with a positioning rod below;The thermocouple positioning assembly contains a hollow sleeve, the hollow sleeve is inserted into the downcomer through the through hole and moves up and down in the downcomer;The positioning rod is provided with a transverse positioning pin, which locks the position of the hollow sleeve in the downcomer.

2. A downcomer arrangement for a multi-stage descending process plant according to claim 1, characterized in that The through hole is a threaded hole, and the outer surface of the pipe joint of the hollow sleeve has an adjusting threaded segment, which is connected with the threaded hole.

3. A downcomer arrangement for a multi-stage descending process plant according to claim 2, characterized in that The hollow sleeve is a hollow screw rod, and the lower end is connected with a matching threaded sleeve, and rotating the threaded sleeve can realize the up and down movement of the hollow sleeve in the downcomer.

4. A downcomer apparatus for a multi-stage descending process equipment according to claim 1, characterized by, The height of the positioning slot is 20mm.

5. A downcomer apparatus for a multi-stage descending process equipment according to claim 1, characterized by, The gap between the positioning slot and the downcomer is controlled to be 0.6-1.0mm.

6. A downcomer apparatus for a multi-stage descending process equipment according to claim 1, characterized by The front side plate and the rear side plate of the base are provided with a downcomer fixing hole, and an internal hexagonal bolt is inserted into the fixing hole and abuts against the downcomer.

7. A downcomer apparatus for a multi-stage descending process equipment according to claim 1, characterized by, The front side plate or the rear side plate of the base is provided with a thermocouple interface, which realizes the electrical connection with the thermocouple.

8. A downcomer apparatus for a multi-stage descending process equipment according to claim 1, characterized by, The bottom of the base is fixedly connected with a lifting platform.

9. A downcomer apparatus for a multi-stage descending process equipment according to claim 1, characterized by, The top end of the hollow sleeve is 420mm away from the lifting platform.

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