Displacement sensor protection box

Abstract

The utility model relates to a displacement sensor protection box, which belongs to the technical field of displacement sensors and comprises a mounting seat, the top and the bottom of the mounting seat are respectively connected with an upper shell and a lower shell, an inner cavity of the lower shell is composed of an upper cavity and a lower cavity which are distributed up and down, and the inner peripheral wall of the lower cavity is concaved inwards to form a lubricating groove. Two guide sleeves are arranged in the lubricating groove, the two guide sleeves are vertically distributed in a spaced mode, the two guide sleeves are fixedly arranged at the top and the bottom in the lubricating groove respectively, a movable sleeve is vertically arranged in the lower cavity in a penetrating mode, the top end of the movable sleeve is located in the upper cavity, and a magnetic sleeve is arranged at the top end of the movable sleeve. According to the utility model, by increasing the length of the guide sleeve at the lower part, the guide effect is improved, the movable sleeve can be prevented from being stuck with the guide strip at the upper part when the movable sleeve moves reversely, the failure rate is reduced, and the normal expansion and contraction of the movable sleeve are ensured.

Description

Technical Field

[0001] The utility model relates to a displacement sensor protection box, belonging to the technical field of displacement sensors. Background Art

[0002] The continuous casting dynamic light reduction technology is a cost-effective new technology for improving the quality of continuous casting billets, which emerged in the mid-to-late 1990s with the advancement of high-precision hydraulic sector manufacturing and remote control technology. It applies pressure at the end of the solidification zone of the continuous casting billet to produce a certain amount of reduction to compensate for the solidification shrinkage of the billet, prevent the molten steel enriched with solute elements between the crystals from flowing laterally to the center of the billet, promote the redistribution of solute elements in the molten steel, thereby making the solidification structure of the billet more uniform and dense, and reducing the center segregation and center looseness of the billet.

[0003] Dynamic soft reduction technology primarily consists of three components: a heat tracking model, an automatic adjustment system, and remotely controlled high-precision segments. The high-precision segments dynamically adjust hydraulic cylinder displacement settings based on commands, thereby varying the roll gap and reduction, ensuring the soft reduction effect during unsteady-state casting. The dynamic roll gap adjustment device is the core of the high-precision segments, and its structure and control method have a direct and decisive impact on roll gap accuracy.

[0004] The core component of the dynamic roll gap adjustment device is a magnetostrictive displacement sensor built into the hydraulic cylinder. MTS Sensors, a pioneer in magnetostrictive sensor technology, has long applied magnetostrictive displacement sensors to the dynamic light reduction position of continuous casting. Using an R-series SSI digital sensor with a resolution of 0.5 microns, it can accurately feedback the current roll gap position and transmit the displacement to the PLC for processing. The host computer adjusts the hydraulic cylinder's reduction accordingly, forming a complete closed-loop control system to ensure the best casting results.

[0005] Since the working environment of the bending section of the wide plate continuous casting machine is relatively harsh, in order to accurately measure the size of the roller gap in the bending section, a displacement sensor is installed between the inner arc and the outer arc of the bending section. The existing displacement sensor includes a mounting block, the left and right sides of the mounting block are respectively connected to the left shell and the right shell, the mounting block is provided with a sensor body, the two ends of the sensor body are respectively located in the left shell and the right shell, the right end of the sensor body is connected to the signal line, the cavity of the left shell includes an assembly cavity and an air cavity distributed on the left and right, a sliding sleeve is provided in the assembly cavity, the sliding sleeve slides and is sealed with the inner wall of the assembly cavity, the left end of the sliding sleeve is located outside the left shell, the left end of the sliding sleeve is sealed, the right end of the sliding sleeve is located in the air cavity, there is a gap between the sliding sleeve and the inner wall of the air cavity, the sliding sleeve can move in the left and right directions on the left shell, the right end of the sliding sleeve is fixedly connected with a magnetic ring, the sensor body passes through the magnetic ring, the sensor body is slidably connected to the magnetic ring, an oil groove is provided on the inner wall of the assembly cavity, the left and right ends of the oil groove are respectively connected with the first copper sleeve and the second copper sleeve, the first copper sleeve The first and second copper sleeves are both sleeved on the sliding sleeve, and the sliding sleeve is guided by the first and second copper sleeves. An oil filling port is provided on the left shell, and lubricating oil is transported to the oil tank through the oil filling port, thereby achieving lubrication of the sliding sleeve. An exhaust port is provided on the top of the left shell, and the exhaust port is connected to the air cavity. The exhaust port is used to achieve air pressure balance during the sliding process of the sliding sleeve, thereby ensuring the smooth sliding of the magnetic ring sliding sleeve on the left shell. However, in the prior art, if the opening degree is relatively large during the debugging process, when the sliding sleeve is pulled out a large distance, it is likely to be disconnected from the second copper sleeve, and because the length of the second copper sleeve is 40 mm and the length of the first copper sleeve is only 20 mm, the guiding performance of the first copper sleeve for the sliding sleeve is poorer than that of the second copper sleeve. Therefore, when the sliding sleeve is retracted, it is likely to be directly stuck on the second copper sleeve, and the sliding sleeve cannot be reset normally, resulting in sensor failure.

[0006] Therefore, there is a need for a displacement sensor protection box to reduce the failure rate and ensure the normal expansion and contraction of the sliding sleeve. Utility Model Content

[0007] The technical problem to be solved by the utility model is: in order to overcome the deficiencies of the prior art, to provide a displacement sensor protection box that reduces the failure rate and ensures the normal extension and retraction of the sliding sleeve.

[0008] The technical solution adopted by the utility model to solve the above problems is: a displacement sensor protective box, including a mounting seat, the top and bottom of the mounting seat are respectively connected to the upper shell and the lower shell, the cavity in the lower shell is composed of an upper cavity body and a lower cavity distributed up and down, the inner circumferential wall of the lower cavity is concave to form a lubrication groove, two guide sleeves are provided in the lubrication groove, the two guide sleeves are spaced apart up and down, and the two guide sleeves are fixedly arranged at the top and bottom of the lubrication groove respectively, a movable sleeve is vertically penetrated in the lower cavity, the top end of the movable sleeve is located in the upper cavity, the top end of the movable sleeve is provided with a magnetic sleeve, a gap is provided between the movable sleeve and the inner wall of the upper cavity, the bottom end of the movable sleeve is located below the lower shell, the bottom end of the movable sleeve is sealed by a sealing block, the two guide sleeves are both sleeved on the movable sleeve, the movable sleeve and the guide sleeve are slidably and sealedly connected, the lengths of the two guide sleeves are equal, both 38mm to 45mm, the sealing block is provided with an air hole, the air hole is communicated with the inner cavity of the movable sleeve, the top end of the movable sleeve is provided with a guide assembly, and the guide assembly is located in the upper cavity;

[0009] The guide assembly includes a connecting block, which is slidably connected to the inner wall of the upper cavity up and down, and abuts against the top of the movable sleeve. A guide rod is vertically passed through the connecting block, and the bottom end of the guide rod is fixedly set on the top of the movable sleeve. A first spring is provided above the connecting block, and the first spring is sleeved on the guide rod. The two ends of the first spring are respectively connected to the top of the guide rod and the top of the connecting block.

[0010] Preferably, the length of the guide sleeve is 40 mm.

[0011] Preferably, both inner ends of the guide sleeve are provided with chamfers.

[0012] Preferably, a filter is installed in the air hole.

[0013] Preferably, a plurality of guide assemblies are provided, and the plurality of guide assemblies are circumferentially distributed around the movable sleeve, and the number of the guide assemblies is specifically two.

[0014] Preferably, the connecting blocks are combined to form a ring.

[0015] Preferably, a plurality of through holes are provided on the lower shell, and the through holes are circumferentially distributed with the lower shell as the center, and each through hole is located between two guide sleeves. A tightening block is passed through the through hole, and the tightening block is slidably and sealedly connected to the inner wall of the through hole. One side of the tightening block abuts against the outer peripheral wall of the movable sleeve, and a locking block is provided on the other side of the tightening block, and the locking block is fixedly connected to the through hole. A second spring is provided between the locking block and the tightening block, and the two ends of the second spring are respectively connected to the tightening block and the locking block. The second spring and the locking block are both located in the through hole, and the second spring is in a compressed state.

[0016] Preferably, the side of the tightening block in contact with the movable sleeve is spherical.

[0017] Preferably, the specific number of the through holes is three.

[0018] Preferably, an oil inlet is provided on the lower shell, and the oil inlet is connected to the lubrication groove.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] The utility model provides a displacement sensor protection box, which improves the guiding effect by increasing the length of the lower guide sleeve, can prevent the movable sleeve from being stuck with the upper guide bar when moving in the reverse direction, reduces the failure rate, and ensures the normal extension and contraction of the movable sleeve. Moreover, during the descent of the movable sleeve, the cooperation between the guide rod and the connecting block further improves the moving guiding effect of the movable sleeve. In addition, during the movement of the movable sleeve, the movable sleeve is tightened by the tightening blocks, which further improves the moving guiding effect of the movable sleeve. Secondly, air exchange inside and outside the displacement sensor is achieved through the air holes arranged at the bottom of the displacement sensor, thereby achieving waterproofing and avoiding water accumulation and rust in the inner cavity of the displacement sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a displacement sensor protection box of the utility model;

[0022] Figure 2 Schematic diagram of the structure of the lower shell;

[0023] Figure 3 for Figure 1 A magnified view of part A;

[0024] Figure 4 for Figure 1 A magnified view of part B;

[0025] Figure 5 It is a schematic diagram of the connection structure between the movable sleeve and the guide assembly.

[0026] in:

[0027] Mounting base 1, sensor body 2, upper shell 3, lower shell 4, upper cavity 5, lower cavity 6, lubrication groove 7, oil inlet 8, guide sleeve 9, movable sleeve 10, magnetic sleeve 11, sealing block 12, air outlet 13, sealing screw 14, air hole 15, filter 16, guide assembly 17, through hole 18, tightening block 19, locking block 20, second spring 21;

[0028] Connecting block 171 , guide rod 172 , first spring 173 . DETAILED DESCRIPTION

[0029] like Figure 1-5 As shown, a displacement sensor protection box in this embodiment includes a mounting base 1, which is used to install a sensor body 2. The sensor body 2 is equivalent to the sensor body in the prior art. The top and bottom of the mounting base 1 are respectively connected to an upper shell 3 and a lower shell 4. The upper shell 3 and the lower shell 4 are equivalent to the right shell and the left shell in the prior art. The cavity in the lower shell 4 is composed of an upper cavity 5 and a lower cavity 6 distributed up and down. The upper cavity 5 and the lower cavity 6 are equivalent to the air cavity and the assembly cavity in the prior art. The inner peripheral wall of the lower cavity 6 is concave to form a lubrication groove 7. An oil inlet 8 is provided on the lower shell, and the oil inlet 8 is connected to the lubrication groove 7. The oil inlet 8 and the lubrication groove 7 are equivalent to the oil groove and the oil filling port in the prior art. Two guide sleeves 9 are provided in the lubrication groove 7. The two guide sleeves 9 are distributed up and down. The two guide sleeves 9 are spaced apart. The guide sleeves 9 are fixedly arranged at the top and bottom of the lubrication groove 7 respectively. The two guide sleeves 9 are equivalent to the first copper sleeve and the second copper sleeve in the prior art. The lengths of the two guide sleeves 9 are equal, both of which are 38mm~45mm, specifically 40mm. A movable sleeve 10 is vertically penetrated in the lower cavity 6. The movable sleeve 10 is equivalent to the sliding sleeve in the prior art. The top of the movable sleeve 10 is located in the upper cavity 5. The top of the movable sleeve 10 is provided with a magnetic sleeve 11, which is equivalent to the magnetic ring in the prior art. A gap is provided between the movable sleeve 10 and the inner wall of the upper cavity 5. The bottom end of the movable sleeve 10 is located below the lower shell 4. The bottom end of the movable sleeve 10 is sealed by a sealing block 12. The two guide sleeves 9 are both sleeved on the movable sleeve 10, and the movable sleeve 10 is slidably and sealedly connected to the guide sleeve 9.

[0030] When in use, the upper shell 3 and the lower shell 4 are distributed up and down, and the sensor body 2 is passed through the mounting base 1 and the magnetic sleeve 11 in sequence. The sensor body 2 is fixedly connected to the mounting base 1, and the sensor body 2 is slidably connected to the magnetic sleeve 11. The top of the sensor body 2 is located in the upper shell 3, and the bottom end of the sensor is located in the movable sleeve 10, that is, a complete displacement sensor is formed. When the movable sleeve 10 is pulled downward by the wide plate continuous casting machine and the upper end of the movable sleeve 10 is moved between the two guide sleeves 9, the lower guide sleeve 9 is increased in length compared to the first copper sleeve in the prior art, thereby improving the guiding effect, preventing the movable sleeve 10 from being stuck with the upper guide bar when moving in the reverse direction, reducing the failure rate, and ensuring the normal extension and contraction of the movable sleeve 10;

[0031] Both inner ends of the guide sleeve 9 are provided with chamfers;

[0032] The upper shell 3 is provided with an air outlet 13, which is equivalent to the exhaust port in the prior art. The air outlet 13 is communicated with the upper cavity 5, and the air outlet 13 is sealed by a sealing screw 14. The sealing block 12 is provided with an air hole 15, which is communicated with the inner cavity of the movable sleeve 10. When the movable sleeve 10 moves downward, the external air is transported into the movable sleeve 10 from the air hole 15. When the movable sleeve 10 moves in the opposite direction, the air in the movable sleeve 10 is discharged from the air hole 15. In the prior art, the left shell and the right shell are distributed left and right, the exhaust port is upward, and the exhaust port is connected to the exhaust pipe. The exhaust pipe is often blocked or falls off, which directly leads to the exhaust port being in an upward open state, which is easy to enter with water and cause water accumulation and rust in the inner cavity of the displacement sensor. After the improvement, the air hole 15 is at the bottom of the displacement sensor, and water cannot enter the movable sleeve 10 upward from the air hole 15, thereby achieving waterproofing, thereby avoiding water accumulation and rust in the inner cavity of the displacement sensor.

[0033] Of course, the air outlet 13 can also be directly omitted from the upper shell 3 during the production process;

[0034] A filter 16 is installed in the air hole 15, and the filter 16 has a dust-proof effect;

[0035] A guide assembly 17 is provided at the top of the movable sleeve 10 , and the guide assembly 17 is located in the upper cavity 5 ;

[0036] The guide assembly 17 includes a connecting block 171, which is slidably connected to the inner wall of the upper cavity 5 up and down, and abuts against the top of the movable sleeve 10. A guide rod 172 is vertically penetrated on the connecting block 171, and the bottom end of the guide rod 172 is fixedly set on the top of the movable sleeve 10. A first spring 173 is provided above the connecting block 171, and the first spring 173 is sleeved on the guide rod 172. The two ends of the first spring 173 are respectively connected to the top of the guide rod 172 and the top of the connecting block 171;

[0037] During the downward movement of the movable sleeve 10, the connecting block 171 is driven to move synchronously in the upper cavity 5 by the guide rod 172 and the first spring 173 in turn. When the connecting block 171 abuts against the bottom of the upper cavity 5, as the movable sleeve 10 continues to move downward, the guide rod 172 moves relative to the connecting block 171, that is, the guide rod 172 moves downward on the connecting block 171 and causes the first spring 173 to deform. When the top end of the movable sleeve 10 is located between the two guide sleeves 9, the cooperation between the guide rod 172 and the connecting block 171 further enhances the guiding effect of the movable sleeve 10. When the movable sleeve 10 moves in the opposite direction, the first spring 173 returns to normal and drives the connecting block 171 to move.

[0038] There are multiple guide assemblies 17, which are distributed circumferentially with the moving sleeve 10 as the center. The number of guide assemblies 17 is specifically two.

[0039] The connecting blocks 171 are combined to form a ring with an outer diameter that is the same as the inner diameter of the upper cavity 5;

[0040] The lower shell 4 is provided with a plurality of through holes 18, the specific number of the through holes 18 is three, each through hole 18 is circumferentially distributed with the lower shell 4 as the center, each through hole 18 is located between two guide sleeves 9, a tightening block 19 is passed through the through hole 18, the tightening block 19 slides and is sealed with the inner wall of the through hole 18, one side of the tightening block 19 abuts against the outer peripheral wall of the movable sleeve 10, and a locking block 20 is provided on the other side of the tightening block 19, the locking block 20 is fixedly connected to the through hole 18, a second spring 21 is provided between the locking block 20 and the tightening block 19, the first The two ends of the second spring 21 are connected to the tightening block 19 and the locking block 20 respectively. The second spring 21 and the locking block 20 are both located in the through hole 18. The second spring 21 is in a compressed state. Through the elastic action of the second spring 21, the tightening block 19 applies pressure to the movable sleeve 10 in the direction close to the axis of the movable sleeve 10, and the guiding of the movable sleeve 10 is achieved through the cooperation of each tightening block 19. Of course, in order to balance the force on the movable sleeve 10, the axes of the tightening blocks 19 are evenly distributed. In addition, through size calculation, the top of the movable sleeve 10 is always located above the tightening block 19;

[0041] The side of the tightening block 19 that contacts the movable sleeve 10 is spherical;

[0042] To sum up, by increasing the length of the lower guide sleeve 9, the guiding effect is improved, and the movable sleeve 10 can be prevented from being stuck with the upper guide bar when moving in the reverse direction, thereby reducing the failure rate and ensuring the normal extension and retraction of the movable sleeve 10. Moreover, during the descent of the movable sleeve 10, the cooperation between the guide rod 172 and the connecting block 171 further improves the moving guiding effect of the movable sleeve 10. In addition, during the movement of the movable sleeve 10, the movable sleeve 10 is tightened by each tightening block 19, which further improves the moving guiding effect of the movable sleeve 10. Secondly, the air hole 15 at the bottom of the displacement sensor is used to realize ventilation inside and outside the displacement sensor, thereby achieving waterproofing and avoiding water accumulation and rust in the inner cavity of the displacement sensor.

[0043] In addition to the above embodiments, the present invention also includes other implementation methods. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of protection of the claims of the present invention.

Claims

1. A displacement sensor protection box, comprising a mounting base (1), wherein the top and bottom of the mounting base (1) are connected to an upper shell (3) and a lower shell (4), respectively; the cavity in the lower shell (4) is composed of an upper cavity (5) and a lower cavity (6) distributed up and down; the inner peripheral wall of the lower cavity (6) is concave to form a lubrication groove (7); two guide sleeves (9) are arranged in the lubrication groove (7); the two guide sleeves (9) are distributed up and down at intervals; the two guide sleeves (9) are fixedly arranged at the top and bottom of the lubrication groove (7), respectively; the lower cavity (6) is vertically recessed. A movable sleeve (10) is provided in the upper cavity (5), the top end of the movable sleeve (10) is located in the upper cavity (5), the top end of the movable sleeve (10) is provided with a magnetic sleeve (11), a gap is provided between the movable sleeve (10) and the inner wall of the upper cavity (5), the bottom end of the movable sleeve (10) is located below the lower shell (4), the bottom end of the movable sleeve (10) is sealed by a sealing block (12), two guide sleeves (9) are both sleeved on the movable sleeve (10), the movable sleeve (10) and the guide sleeve (9) are slidably and sealedly connected, and the characteristics are: The two guide sleeves (9) are of equal length, both ranging from 38 mm to 45 mm. The sealing block (12) is provided with an air hole (15), the air hole (15) is communicated with the inner cavity of the movable sleeve (10), and the top end of the movable sleeve (10) is provided with a guide assembly (17), and the guide assembly (17) is located in the upper cavity (5); The guide assembly (17) includes a connecting block (171), the connecting block (171) is slidably connected to the inner wall of the upper cavity (5) up and down, the connecting block (171) is in contact with the top of the movable sleeve (10), a guide rod (172) is vertically passed through the connecting block (171), the bottom end of the guide rod (172) is fixedly arranged on the top of the movable sleeve (10), a first spring (173) is arranged above the connecting block (171), the first spring (173) is sleeved on the guide rod (172), and the two ends of the first spring (173) are respectively connected to the top of the guide rod (172) and the top of the connecting block (171).

2. The displacement sensor protection box according to claim 1, characterized in that: The length of the guide sleeve (9) is 40 mm.

3. The displacement sensor protection box according to claim 1, characterized in that: Both inner ends of the guide sleeve (9) are provided with chamfers.

4. The displacement sensor protection box according to claim 1, characterized in that: A filter screen (16) is installed in the air hole (15).

5. The displacement sensor protection box according to claim 1, characterized in that: The guide assemblies (17) are provided in plurality, and the plurality of guide assemblies (17) are distributed circumferentially with the movable sleeve (10) as the center, and the number of the guide assemblies (17) is specifically two.

6. The displacement sensor protection box according to claim 5, characterized in that: The connecting blocks (171) are combined to form a ring.

7. The displacement sensor protection box according to claim 1, characterized in that: The lower shell (4) is provided with a plurality of through holes (18), each through hole (18) is distributed circumferentially with the lower shell (4) as the center, and each through hole (18) is located between the two guide sleeves (9). A tightening block (19) is passed through the through hole (18), and the tightening block (19) is slidably and sealedly connected to the inner wall of the through hole (18). One side of the tightening block (19) abuts against the outer peripheral wall of the movable sleeve (10), and a locking block (20) is provided on the other side of the tightening block (19), and the locking block (20) is fixedly connected to the through hole (18). A second spring (21) is provided between the locking block (20) and the tightening block (19), and the two ends of the second spring (21) are respectively connected to the tightening block (19) and the locking block (20). The second spring (21) and the locking block (20) are both located in the through hole (18), and the second spring (21) is in a compressed state.

8. The displacement sensor protection box according to claim 7, characterized in that: The side of the tightening block (19) that contacts the movable sleeve (10) is spherical.

9. The displacement sensor protection box according to claim 7, characterized in that: The specific number of the through holes (18) is three.

10. The displacement sensor protection box according to claim 1, characterized in that: An oil inlet (8) is provided on the lower shell, and the oil inlet (8) is communicated with the lubrication groove (7).

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