Melt flow detection device for plastic production

Abstract

The utility model discloses a melt flow detection device for plastic production, which is characterized in that a limiting flange is arranged at the top of a main connecting block and can be propped against an opening of a melt index instrument charging barrel; a plurality of heat conduction blocks and heat insulation blocks are sequentially clamped below the main connecting block along the same straight line in a staggered manner; the main connecting block, the heat conduction block and the heat insulation block are respectively provided with a first threading hole, a second threading hole and a third threading hole; the temperature probe is clamped on the heat conduction block, and a power line of the temperature probe can penetrate out of the top of the main connecting block through the threading channel. And each heat conduction block is provided with at least one temperature probe. According to the utility model, temperature data of different depths of the charging barrel can be obtained at one time, and multi-point synchronous measurement of axial temperature gradient distribution is realized; the alternate stacking structure of the heat conduction blocks and the heat insulation blocks forms a heat conduction gradient barrier, so that the heat transfer independence of each temperature measurement point is ensured, and axial heat diffusion interference is effectively isolated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastics production, especially relates to a melt flow detection appliance for plastics production. BACKGROUND

[0002] Melt flow rate tester (abbreviated as melt index tester) as one of the core equipment of polymer material processing performance evaluation, is widely used in the melt index detection of polyethylene, nylon, polycarbonate, fluoroplastic and other high molecular materials. In the detection process, the uniformity and stability of the temperature field of the cylinder directly affect the accuracy of the test results, so the temperature calibration link becomes the technical basis for ensuring the measurement accuracy of the instrument.

[0003] The traditional calibration method uses a contact thermometer to measure the temperature at a single point. The operator needs to insert the temperature probe into different depth positions of the cylinder for discrete measurement. This method has the following technical defects: first, manual positioning cannot accurately control the insertion depth of the thermometer, resulting in spatial deviation between the measurement point and the standard position; second, single-point sampling cannot obtain the axial temperature gradient distribution characteristics, which hides the non-uniformity of the cylinder thermal field; third, multiple-point measurement at multiple positions prolongs the calibration period and increases the instrument downtime. Therefore, further improvement is needed. SUMMARY

[0004] The utility model aims at at least solves one of the technical problems existing in the prior art. Therefore, the utility model provides a melt flow detection appliance for plastics production.

[0005] The technical scheme adopted by one embodiment of the utility model to solve its technical problem is: a melt flow detection appliance for plastics production, comprising: a main connecting block, a heat conduction block, an insulating block, a sealing block, and a temperature probe.

[0006] The top of the main connecting block is provided with a limiting flange, which can abut the opening of the melt index tester cylinder; a plurality of heat conduction blocks and insulating blocks are staggered and clamped below the main connecting block along the same straight line; the main connecting block, the heat conduction block, and the insulating block are respectively provided with first threading holes, second threading holes, and third threading holes; the first threading holes, the second threading holes, and the third threading holes are interconnected along the same straight line and form a threading channel; the temperature probe is clamped on the heat conduction block, and the power cord of the temperature probe can pass through the threading channel from the top of the main connecting block; each heat conduction block is provided with at least one temperature probe.

[0007] The sealing block is clamped on the lowermost heat conduction block or insulating block to seal the bottom end of the threading channel.

[0008] Optionally, the main connecting block, the heat conduction block, and the insulating block are in a cylindrical structure.

[0009] Optionally, the heat-conducting blocks and the heat-insulating blocks are provided with connecting protrusions and connecting recesses which can be engaged with each other.

[0010] Optionally, the connecting protrusions are cylindrical protrusions; and the connecting recesses are circular holes or grooves.

[0011] Optionally, the surface of the connecting protrusions is provided with knurling.

[0012] Optionally, the upper end of the main connecting block is further provided with a threaded column; the threaded column is arranged above the first threading hole; the power line of the temperature probe is provided with a threaded locking member; and the threaded locking member can be bolted with the threaded column.

[0013] Optionally, the main connecting block and the heat-insulating block are plastic parts; and the heat-conducting block is made of copper or copper alloy.

[0014] The beneficial effects of the utility model are as follows: through the structure of the heat-conducting blocks, the heat-insulating blocks and the temperature probe cooperating with each other, a rod body in a strip shape can be formed, the rod body can be put into a material cylinder of a melting point tester, and the position of the temperature probe in the rod body is relatively fixed. When the rod body is inserted into the material cylinder, the temperature data of different depths of the material cylinder can be obtained at one time through the multiple heat-conducting blocks integrated with the temperature probe arranged along the axial direction of the material cylinder, and the synchronous measurement of multiple points of the axial temperature gradient distribution is realized; the alternating and laminated structure of the heat-conducting blocks and the heat-insulating blocks forms a heat conduction gradient barrier, which not only ensures the independence of heat transfer of each temperature measuring point, but also effectively isolates the axial heat diffusion interference.

[0015] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are taken as examples, and the detailed description is as follows in combination with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0017] Figure 1 It is a sectional structure schematic view of the utility model;

[0018] Figure 2 It is a top view of the utility model.

[0019] Explanation of main element symbols:

[0020] 10, main connecting block; 11, limiting flange; 12, first threading hole; 13, threaded column; 20, heat-conducting block; 21, second threading hole; 22, connecting protrusion; 30, heat-insulating block; 31, third threading hole; 32, connecting recess; 40, sealing block; 50, temperature probe; 51, threaded locking member; 60, threading channel. DETAILED DESCRIPTION

[0021] This part will describe the specific embodiments of the utility model in detail, the preferred embodiment of the utility model is shown in the drawings, the role of the drawings is to supplement the description of the written part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0022] In the description of the utility model, the meaning of multiple is more than two, greater than, less than, more than, etc. is not included in the number, above, below, within, etc. is included in the number. If it is described as first, second, it is only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0023] In the description of the utility model, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and is not used to indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the utility model.

[0024] In the utility model, unless otherwise specified, the words such as "setting", "installing", "connecting" should be understood broadly, for example, it can be directly connected, or indirectly connected through an intermediate medium; it can be fixedly connected, or detachably connected, or integrally formed; it can be mechanically connected; it can be the communication or interaction relationship between two elements. The skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0025] Embodiment

[0026] Refer to Figure 1 and Figure 2 The utility model provides a kind of melt flow detection appliance for plastic production, it include: main connecting block 10, heat conducting block 20, heat insulation block 30, sealing block 40 and temperature probe 50;

[0027] The top of the main connecting block 10 is provided with a limiting flange 11 which can abut the opening of the melt finger instrument barrel; a plurality of heat conducting blocks 20 and heat insulating blocks 30 are arranged on the lower part of the main connecting block 10 along the same straight line; the main connecting block 10, the heat conducting block 20 and the heat insulating block 30 are respectively provided with a first threading hole 12, a second threading hole 21 and a third threading hole 31; the first threading hole 12, the second threading hole 21 and the third threading hole 31 are communicated along the same straight line and form a threading channel 60; the temperature probe 50 is clamped on the heat conducting block 20, and the power line of the temperature probe 50 can pass out from the top of the main connecting block 10 through the threading channel 60; each heat conducting block 20 is provided with at least one temperature probe 50;

[0028] The sealing block 40 is clamped on the lowermost heat conducting block 20 or heat insulating block 30 and is used for sealing the bottom end of the threading channel 60.

[0029] In the utility model, the heat conducting block 20, the heat insulating block 30 and the temperature probe 50 are matched to form a long rod body, the rod body can be put into the melt finger instrument barrel, and the position of the temperature probe 50 in the rod body is relatively fixed. When the rod body is inserted into the barrel, the temperature probe 50 is integrated by the plurality of heat conducting blocks 20 arranged along the axial direction of the barrel, and the temperature data of different depths of the barrel can be obtained at one time, so that the multi-point synchronous measurement of the axial temperature gradient distribution is realized; the heat conducting block 20 and the heat insulating block 30 are alternately stacked to form a heat conduction gradient barrier, which ensures the independence of heat transfer of each temperature measuring point and effectively isolates the axial heat diffusion interference.

[0030] In the embodiment, the main connecting block 10, the heat conducting block 20 and the heat insulating block 30 are in cylindrical structure. The cylindrical detector is coaxially matched with the cylindrical cavity of the melt finger instrument barrel, the edge heat loss caused by the special-shaped structure is eliminated, and the uniform contact between the temperature measuring rod body and the inner wall of the barrel is ensured.

[0031] In the embodiment, the heat conducting block 20 and the heat insulating block 30 are provided with the connecting convex blocks 22 and the connecting concave holes 32 which can be clamped. The modular assembly structure enables the heat conducting block 20 and the heat insulating block 30 to be quickly inserted and combined, and the assembly efficiency is improved; the mechanical interlocking mechanism prevents the interlayer displacement caused by the axial thermal expansion, and ensures the depth positioning accuracy of each temperature measuring point.

[0032] Specifically, the connecting convex block 22 is a cylindrical protrusion; and the connecting concave hole 32 is a circular hole groove. The 360° arbitrary angle insertion is realized through the rotational symmetry characteristics, the assembly direction limitation is eliminated, the operation fault tolerance is improved, and the alignment of each threading hole can be conveniently adjusted.

[0033] Further, the surface of the connecting convex block 22 is provided with a knurled pattern. The friction coefficient of the contact surface of the convex block and the concave hole is increased, and the relative sliding caused by vibration or thermal shock is effectively resisted.

[0034] In the embodiment, the upper end of the main connecting block 10 is further provided with a threaded column 13; the threaded column 13 is arranged above the first threading hole 12; the power line of the temperature probe 50 is provided with a threaded locking piece 51; the threaded locking piece 51 can be bolted with the threaded column 13. The quick-release threaded connection design makes the locking and installation of the power line quick and convenient, and the maintenance efficiency is improved compared with the traditional welding method. Specifically, by arranging nuts on the power line at the corresponding length position of the temperature probe 50 at different depths, when the nuts are connected and fixed with the threaded columns, each temperature probe 50 can be located at the corresponding depth of the temperature probe body, facilitating the installation of the temperature probe 50.

[0035] In the embodiment, the main connecting block 10 and the heat insulation block 30 are plastic parts; the heat conducting block 20 is made of copper or copper alloy. The heat conducting block 20 is made of metal with good heat conduction performance, preferably a copper column. The main connecting block 10 and the heat insulation block 30 are made of heat insulation materials such as asbestos, glass fiber or polyurethane foam plastic with good heat insulation performance.

[0036] Of course, the utility model is not limited to the above-mentioned embodiment, and the skilled person in the art can also make equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications and replacements are all included in the range defined by the claims of the present application.

Claims

1. A melt flow detection device for plastic production, characterized by, The utility model relates to a temperature probe fixing device for a melt index tester, which comprises a main connecting block (10), a heat conducting block (20), a heat insulation block (30), a sealing block (40) and a temperature probe (50). The top of the main connecting block (10) is provided with a limiting flange (11) which can abut against the opening of the melt index tester barrel; a plurality of heat conducting blocks (20) and heat insulation blocks (30) are arranged in the same line below the main connecting block (10) in turn; the main connecting block (10), the heat conducting block (20) and the heat insulation block (30) are respectively provided with a first threading hole (12), a second threading hole (21) and a third threading hole (31); the first threading hole (12), the second threading hole (21) and the third threading hole (31) are in communication with each other along the same line and form a threading channel (60); the temperature probe (50) is arranged in the heat conducting block (20), and the power cord of the temperature probe (50) can pass through the threading channel (60) from the top of the main connecting block (10); each heat conducting block (20) is provided with at least one temperature probe (50). The sealing block (40) is arranged in the lowermost heat conducting block (20) or heat insulation block (30) to seal the bottom end of the threading channel (60). The main connecting block (10), the heat conducting block (20) and the heat insulation block (30) are in cylindrical structure.

2. The melt flow detection device for plastic production according to claim 1, characterized by: The heat conducting block (20) and the heat insulation block (30) are provided with connecting protrusions (22) and connecting recesses (32) which can be engaged with each other.

3. The melt flow detection device for plastic production according to claim 2, characterized by: The connecting protrusions (22) are in cylindrical shape; the connecting recesses (32) are in circular hole recesses.

4. The melt flow detection device for plastic production according to claim 3, characterized by: The surface of the connecting protrusions (22) is provided with knurling.

5. The melt flow detection apparatus for plastic production according to claim 3, characterized by: The upper end of the main connecting block (10) is further provided with a threaded column (13); the threaded column (13) is arranged above the first threading hole (12); the power cord of the temperature probe (50) is provided with a threaded locking member (51); the threaded locking member (51) can be bolted with the threaded column (13).

6. The melt flow detection apparatus for plastic production according to claim 1, characterized by: The main connecting block (10) and the heat insulation block (30) are plastic parts; the heat conducting block (20) is made of copper or copper alloy.

7. The melt flow detection apparatus for plastic production according to claim 1, characterized by: ​

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