Cast pipe internal grinding system

Abstract

The utility model relates to a cast pipe internal grinding system which comprises a cast pipe. The polishing device comprises a supporting assembly, a polishing assembly, a polishing trolley, a polishing rod, a polishing head and a protective cover and further comprises a positioning assembly. The positioning assembly is located on the polishing assembly, moves towards the cast pipe along with the polishing assembly, touches the end portion of the inserting opening side of the cast pipe before the edge of the outermost side of the polishing head and sends a starting signal to the polishing assembly. Positioning is accurate, and the grinding quality and the grinding efficiency are remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of finishing processing of ductile iron pipes, in particular to an internal grinding system for cast pipes. Background Art

[0002] The finishing process of ductile iron pipes (referred to as cast pipes) requires centrifugal coating of cement mortar on the inside. However, the outer surface quality of the coated cement mortar will have certain defects. In order to overcome the uneven defects, it is necessary to grind the inner wall of the cast pipe. Even some cast pipes that are not coated with mortar need to have their inner wall polished before sales.

[0003] The inventors found that in the production process of cast pipes, whether it is to make metallographic sample rings or to control the length or the size of the socket, the socket must be cut, that is, a section of the pipe body must be cut axially. This operation will inevitably lead to inconsistencies in the overall length of the pipe body. During grinding, the socket side is provided with a retaining wheel, so the cast pipe can be aligned after rotation, and the edge of the socket can be kept consistent, but the edge of the socket side will be uneven. In order to overcome the above problems, the socket is usually positioned manually, but this method is inefficient. In the process of continuous production, it can only rely on the centering detection position of the front station, or manually set the shortest edge position. As a result, the edge positioning is not accurate enough. During grinding, a section of the pipe body will be left empty on the inside of the socket and cannot be ground, so it can only be ground twice, which undoubtedly greatly affects the production efficiency.

[0004] Therefore, there is an urgent need for a system that can locate the position of the socket to cooperate with the internal grinding device to complete the grinding operation. Summary of the invention

[0005] In order to overcome the problem of the existing technology that the positioning is impossible and the grinding is idle, the inventor designed a socket end positioning device that cooperates with the grinding trolley to realize the automatic internal grinding of the cast pipe. The technical solution adopted by the utility model is: a cast pipe internal grinding system, including:

[0006] Cast pipe;

[0007] A support assembly is a device for supporting the cast pipe to be placed horizontally, driving the cast pipe to rotate around the axis, and fixing the position of the socket end of the cast pipe;

[0008] The grinding assembly is a device for grinding the inner wall of the cast pipe, and the grinding assembly comprises:

[0009] A grinding trolley is a trolley located outside the socket end of the casting pipe and reciprocating along the axis direction of the casting pipe;

[0010] A grinding rod is a rod located on the grinding trolley and facing the casting pipe;

[0011] A grinding head is fixed to one end of the grinding rod facing the cast pipe, and moves into the cast pipe with the help of the grinding carriage to grind the inner wall of the cast pipe;

[0012] A protective cover, fixed on the grinding trolley and surrounding the outer side of the grinding rod;

[0013] Also included: a positioning component;

[0014] The positioning assembly is located on the grinding assembly, moves toward the casting pipe with the grinding assembly, and touches the end of the casting pipe socket side before the outermost edge of the grinding head, sending a start signal to the grinding assembly.

[0015] Furthermore, the positioning assembly is fixed on the protective cover and includes:

[0016] The sensing rod is a rod having a length greater than the radius of the casting tube;

[0017] A clamping part, wherein the clamping part is provided with two surfaces with an angle greater than 75 degrees and less than 135 degrees, the edges of the two surfaces are provided with arc-shaped grooves, and there is an arc between two adjacent grooves;

[0018] The clamping portion is fixed to the outside of the protective cover;

[0019] The clamping part is provided with a hinge point, one end of the sensing rod is hinged to the hinge point, and the other end reciprocates around the hinge point between two surfaces of the clamping part provided with a groove;

[0020] The sensing rod also includes:

[0021] A fixing part, fixed to the middle part of the sensing rod;

[0022] A movable portion, which is sleeved on one end of the sensing rod facing the engaging portion and slides relative to the sensing rod;

[0023] An elastic member is provided between the fixed portion and the movable portion;

[0024] The movable part is provided with an arc-shaped protrusion matching the arc-shaped groove on the clamping part on one side of the movable part facing the clamping part, and the movable part is always in contact with the clamping part by means of the elastic member;

[0025] The sensing rod can be detachably positioned on the two arc-shaped grooves provided on the clamping portion by means of the cooperation between the movable portion and the clamping portion;

[0026] The sensing rod extends obliquely toward the grinding head and protrudes out of the outermost edge of the grinding head. After touching the outer edge of the plug side of the casting pipe, the sensing rod swings to the other arc-shaped groove of the clamping part with the help of the grinding assembly, and a distance is set between the sensing rod and the inner wall of the casting pipe.

[0027] A reset stopper rod is fixedly mounted on the motion track of the sensing rod, and with the help of the movement of the grinding assembly, the sensing rod is reset from a position with a spacing from the inner wall of the casting pipe to a position facing the end of the casting pipe socket side;

[0028] The induction switch is located on the engaging portion or the induction rod, monitors the position state of the induction rod, and sends a start signal to the grinding component.

[0029] Furthermore,

[0030] The induction switch is an angle sensor or a laser sensor.

[0031] Furthermore, it also includes:

[0032] A position monitoring system monitors the position status of the grinding assembly and is connected to the induction switch signal, records the position of the grinding assembly when the induction switch sends a signal, and controls the grinding assembly to reciprocate between the recorded position and the socket end of the cast pipe.

[0033] Furthermore,

[0034] The sensing rod has an arc-shaped end surface facing one end of the casting pipe.

[0035] Furthermore,

[0036] The elastic member is a spring.

[0037] Compared with the prior art, the utility model has the following beneficial effects: the edge position is accurately measured when grinding at the current workstation, a signal is provided for starting and stopping grinding, positioning is precise, and grinding quality and grinding efficiency are significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a front view of a specific implementation method of the utility model;

[0039] Figure 2 This is a front view of a positioning assembly for a specific implementation of the utility model;

[0040] Figure 3 This is a schematic diagram of positioning and flipping of a positioning assembly according to a specific embodiment of the utility model;

[0041] Figure 4 This is a schematic diagram of the reset and flipping of the positioning assembly in a specific implementation mode of the utility model;

[0042] The annotations are:

[0043] 100-cast pipe; 200-support assembly;

[0044] 300-grinding assembly; 310-grinding trolley; 320-grinding head; 330-grinding rod; 340-protective cover;

[0045] 400 - positioning assembly; 410 - sensing rod; 420 - snap-fitting portion; 430 - fixing portion; 440 - movable portion; 450 - elastic member; 460 - reset lever. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0047] In order to overcome the problem of the existing technology that the positioning is impossible and causes grinding gaps, the inventor designed a socket end positioning device that cooperates with the grinding trolley to achieve automatic internal grinding of the cast pipe. Figures 1 to 4 The technical solution adopted by the utility model is: a cast pipe internal grinding system, comprising:

[0048] Cast pipe 100;

[0049] The support assembly 200 is a device for supporting the casting pipe 100 to be placed horizontally, driving the casting pipe 100 to rotate around the axis, and fixing the position of the socket end of the casting pipe 100; see Figure 1 Generally, the lower part of the support assembly 200 is a supporting wheel, and the socket side is provided with a retaining wheel, which can ensure that one side of the cast pipe 100 is flush in the work station, which is convenient for subsequent positioning and grinding.

[0050] The grinding assembly 300 is a device for grinding the inner wall of the casting pipe 100, and the grinding assembly 300 includes:

[0051] The grinding trolley 310 is located outside the socket end of the casting pipe 100 and reciprocates along the axial direction of the casting pipe 100; please refer to the applicant's prior application CN217493807U, a water grinder superimposed flexible lifting device. During the grinding process, the grinding head 320 is required to enter basically in the axial direction, and when grinding is required, it falls down and is close to the inner wall.

[0052] The grinding rod 330 is a rod located on the grinding carriage 310 and facing the casting pipe 100; in the embodiment, refer to Figure 1The grinding rod 330 is driven to rotate by the driving device and is transmitted to the grinding head 320 .

[0053] The grinding head 320 is fixed to one end of the grinding rod 330 facing the casting pipe 100, and moves into the casting pipe 100 with the help of the grinding carriage 310 to grind the inner wall of the casting pipe 100;

[0054] A protective cover 340 is fixed on the polishing carriage 310 and surrounds the outer side of the polishing rod 330;

[0055] Also included: a positioning component 400;

[0056] The positioning assembly 400 is located on the grinding assembly 300, moves with the grinding assembly 300 toward the cast pipe 100, and touches the end of the plug side of the cast pipe 100 before the outermost edge of the grinding head 320, and sends a start signal to the grinding assembly 300. It should be noted that the technical solution of the utility model is to set a follow-up, triggerable positioning assembly 400 on the grinding assembly 300 to provide a start signal method to the grinding head 320. In the prior art, due to the ring cutting at the previous workstation, although the cast pipe 100 is based on a fixed length of 3 / 4 / 6 meters, there will be a certain deviation in the cutting process, resulting in the inability to identify the edge to be polished during the grinding process, resulting in inconsistent inner wall quality. Therefore, an excitation switch is provided to achieve the positioning function.

[0057] The positioning assembly 400 can be an excitable switch extending from the grinding carriage 310, which retracts after being touched and retracts with movement, or it can be a touch switch set on the protective cover 340. The purpose is to tell the system that it has reached the edge and can be started.

[0058] In other embodiments, see Figure 2 , providing a preferred technical solution, the positioning assembly 400 is fixed on the protective cover 340, including:

[0059] The sensing rod 410 is a rod having a length greater than the radius of the casting tube 100;

[0060] The clamping part 420 is provided with two faces with an angle greater than 75 degrees and less than 135 degrees, and the edges of the two faces are provided with arc-shaped grooves, and the space between the two adjacent grooves is an arc; the angle of the clamping part 420 is to allow the sensing rod 410 to retract after touching, and the retracted state will not interfere with the inner wall of the cast pipe 100. If the angle is too small, such as 45°, although it can be retracted, the force required in the process of transferring the position of the sensing rod 410 is relatively large, which will affect the positioning of the cast pipe, so 75° to 135° is the conclusion of the inventor after many tests, and the optimal is 90°. It is easy to adjust the position without requiring a large force.

[0061] The engaging portion 420 is fixed to the outside of the protective cover 340;

[0062] The clamping part 420 is provided with a hinge point, one end of the sensing rod 410 is hinged to the hinge point, and the other end reciprocates around the hinge point between two surfaces provided with a groove on the clamping part 420; the swing of the sensing rod 410, please refer to Figure 3 and Figure 4 .

[0063] See also Figure 2 , the sensing rod 410 further includes:

[0064] The fixing portion 430 is fixed to the middle portion of the sensing rod 410;

[0065] The movable portion 440 is sleeved on one end of the sensing rod 410 facing the engaging portion 420 and slides relative to the sensing rod 410;

[0066] An elastic member 450 is disposed between the fixed portion 430 and the movable portion 440;

[0067] The movable portion 440 is provided with an arc-shaped protrusion matching the arc-shaped groove on the locking portion 420 on one side thereof facing the locking portion 420. The movable portion 440 is always in contact with the locking portion 420 by means of the elastic member 450.

[0068] The sensing rod 410 can be detachably positioned on the two arc-shaped grooves provided on the engaging portion 420 by means of the cooperation between the movable portion 440 and the engaging portion 420;

[0069] The sensing rod 410 extends obliquely toward the grinding head 320 and protrudes out of the outermost edge of the grinding head 320. After touching the outer edge of the plug side of the casting pipe 100, it moves with the help of the grinding assembly 300 and swings to the other arc-shaped groove of the clamping part 420, and a distance is set between it and the inner wall of the casting pipe 100.

[0070] The movable part 440 uses the push force of the elastic member 450 to keep the sensing rod 410 fixed in the two grooves, so as to achieve a state that can slide and lock. When touching the socket of the casting pipe 100, only a certain push force is needed to make the sensing rod 410 swing to another state without interfering with the inner wall.

[0071] The reset stopper rod 460 is fixedly installed on the motion track of the sensing rod 410, and moves with the aid of the grinding assembly 300 to reset the sensing rod 410 from a position at which a gap is set with the inner wall of the casting pipe 100 to a position facing the end of the socket side of the casting pipe 100;

[0072] The induction switch is located on the engaging portion 420 or the induction rod 410, monitors the position state of the induction rod 410, and sends a start signal to the grinding assembly 300. There are many technical means to realize monitoring the induction rod 410, such as setting a touch switch on the induction rod 410, and obtaining an induction signal when the induction rod 410 moves, or setting a laser to sense the induction rod 410, and obtaining an induction signal when the position of the induction rod 410 changes.

[0073] In some embodiments, preferably,

[0074] The induction switch is an angle sensor or a laser sensor. It should be noted that in this embodiment, the angle sensor is on the induction rod 410, and the laser sensor can be set on the induction rod 410 or on the engaging portion 420, the purpose of which is to sense the position change of the induction rod 410.

[0075] In some other embodiments, it also includes:

[0076] A position monitoring system, which monitors the position state of the grinding assembly 300, is connected to the induction switch signal, records the position of the grinding assembly 300 when the induction switch sends a signal, and controls the grinding assembly 300 to reciprocate between the recorded position and the socket end of the casting pipe 100. The position monitoring system can be a laser distance measuring device provided outside the system, or an encoder coordinated with the grinding carriage 310.

[0077] In some other embodiments, the end of the sensing rod 410 facing the casting pipe 100 is an arc-shaped end surface to avoid the situation of contact jam.

[0078] In other embodiments, compared with traditional rubber products, the elastic member 450 is preferably a spring.

[0079] Specific operation method:

[0080] The grinding head 320 moves toward the casting pipe 100 with the aid of the grinding carriage 310;

[0081] When the positioning assembly 400 touches the outer side of the socket end of the casting pipe 100, the grinding head 320 starts;

[0082] The grinding head 320 starts grinding the inner wall of the casting pipe 100 and reciprocates according to the position recorded by the positioning assembly 400;

[0083] The grinding head 320 is withdrawn from the casting tube 100, and the positioning assembly 400 is reset by the movement of the grinding carriage 310.

[0084] See also Figure 3 During use, the method for locating the end position of the socket of the cast pipe 100 is to sense the position change of the sensing rod 410. The engaging portion 420 enables the sensing rod 410 to maintain another state to avoid interference with the inner wall of the cast pipe 100.

[0085] Compared with the prior art, the utility model has the following beneficial effects: the edge position is accurately measured when grinding at the current workstation, a signal is provided for starting and stopping grinding, positioning is precise, and grinding quality and grinding efficiency are significantly improved.

[0086] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cast pipe internal grinding system, comprising: Cast pipe (100); A support assembly (200) is a device for supporting the casting pipe (100) to be placed horizontally, driving the casting pipe (100) to rotate around the axis, and fixing the position of the socket end of the casting pipe (100); The grinding assembly (300) is a device for grinding the inner wall of the casting pipe (100), and the grinding assembly (300) comprises: A grinding trolley (310) is located outside the socket end of the casting pipe (100) and reciprocates along the axis direction of the casting pipe (100); A grinding rod (330) is a rod located on the grinding trolley (310) and facing the casting pipe (100); A grinding head (320) is fixed to one end of the grinding rod (330) facing the casting pipe (100), and moves into the casting pipe (100) with the help of the grinding trolley (310) to grind the inner wall of the casting pipe (100); A protective cover (340) is fixed on the grinding carriage (310) and surrounds the outer side of the grinding rod (330); It is characterized by further comprising: a positioning component (400); The positioning assembly (400) is located on the grinding assembly (300), moves with the grinding assembly (300) toward the casting pipe (100), and touches the end of the socket side of the casting pipe (100) before the outermost edge of the grinding head (320), and sends a start signal to the grinding assembly (300).

2. The cast pipe internal grinding system according to claim 1, characterized in that: The positioning assembly (400) is fixed on the protective cover (340), and comprises: The sensing rod (410) is a rod having a length greater than the radius of the casting pipe (100); A clamping portion (420), wherein the clamping portion (420) is provided with two surfaces with an angle greater than seventy-five degrees and less than one hundred and thirty-five degrees, the edges of the two surfaces are provided with arc-shaped grooves, and an arc is formed between two adjacent grooves; The engaging portion (420) is fixed to the outside of the protective cover (340); The clamping portion (420) is provided with a hinge point, one end of the sensing rod (410) is hinged to the hinge point, and the other end reciprocates around the hinge point between two surfaces of the clamping portion (420) provided with a groove; The sensing rod (410) further includes: A fixing portion (430) fixed to the middle portion of the sensing rod (410); A movable portion (440) is sleeved on one end of the sensing rod (410) facing the engaging portion (420) and slides relative to the sensing rod (410); An elastic member (450) is provided between the fixed portion (430) and the movable portion (440); The movable portion (440) is provided with an arc-shaped protrusion matching the arc-shaped groove on the clamping portion (420) on one side thereof facing the clamping portion (420); the movable portion (440) is always in contact with the clamping portion (420) by means of the elastic member (450); The sensing rod (410) can be detachably positioned on the two arc-shaped grooves provided on the clamping portion (420) by means of the cooperation between the movable portion (440) and the clamping portion (420); The sensing rod (410) extends obliquely toward the grinding head (320) and protrudes out of the outermost edge of the grinding head (320), and after touching the outer edge of the plug side of the casting pipe (100), it moves with the help of the grinding assembly (300) and swings to the other arc-shaped groove of the clamping part (420), and a distance is set between it and the inner wall of the casting pipe (100); A reset stop rod (460) is fixedly mounted on the motion track of the sensing rod (410), and is used to reset the sensing rod (410) from a position at which a distance from the inner wall of the casting pipe (100) is provided to a position facing the end of the socket side of the casting pipe (100) by means of the movement of the grinding assembly (300); The induction switch is located on the engaging portion (420) or the induction rod (410), monitors the position state of the induction rod (410), and sends a start signal to the grinding assembly (300).

3. The cast pipe internal grinding system according to claim 2, characterized in that: The induction switch is an angle sensor or a laser sensor.

4. The cast pipe internal grinding system according to claim 2, characterized in that: Also includes: A position monitoring system, wherein the position monitoring system monitors the position state of the grinding assembly (300) and is connected to the induction switch signal, records the position of the grinding assembly (300) when the induction switch sends a signal, and controls the grinding assembly (300) to reciprocate between the recorded position and the socket end of the cast pipe (100).

5. The cast pipe internal grinding system according to claim 2, characterized in that: The end of the sensing rod (410) facing the casting pipe (100) is an arc-shaped end surface.

6. The cast pipe internal grinding system according to claim 2, characterized in that: The elastic member (450) is a spring.

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