A guide sleeve for deep hole finishing of ultra-high pressure pipe

Abstract

The present invention relates to the field of mechanical processing, and specifically to a deep hole finishing guide sleeve for ultra-high pressure pipes, comprising a valve body, an oil storage chamber is provided in the valve body, a piston assembly is provided in the oil storage chamber, the piston assembly is used to connect a tool, a plurality of adjustment chambers are arranged around the outer wall of the valve body, each of the adjustment chambers is communicated with the oil storage chamber, an adjustment slider is nested in the adjustment chamber, and a plurality of springs are connected between the adjustment slider and the bottom wall of the oil storage chamber. In the ultra-high pressure pipe deep hole finishing guide sleeve provided by the present invention, the resistance encountered by the valve body during the forward movement acts on the tool rod, and pushes the piston assembly to pressurize the hydraulic oil in the oil storage chamber, and the adjustment slider undergoes adaptive displacement under the action of the hydraulic oil, thereby changing the length of the adjustment slider extending out of the adjustment chamber, and correcting the eccentricity of the tool during the machining process.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing, and in particular to a deep hole finishing guide sleeve for an ultra-high pressure pipe. Background Art

[0002] Low-density polyethylene is produced by free radical polymerization under high pressure (pressure 140-310MPa). Its production process is divided into two categories: tubular process and kettle process. Ultra-high pressure pipe is the key equipment of tubular process. It is about 8m long, and the aspect ratio is usually more than 100. The straightness of the center hole is required to be ≤0.5mm / m, and the roughness of the center hole is required to reach 0.4um. It is difficult to process and manufacture.

[0003] At present, the center hole processing of ultra-high pressure pipes adopts ordinary guide sleeves to guide deep hole drilling for final finishing. The side of the guide sleeve is connected to an adjustment slider through a spring. During use, the adjustment slider fits tightly with the inner hole of the pipe to achieve the fixation of the guide sleeve in different hole diameters. However, the force applied to the tool during the processing may cause the spring to expand and contract and become stuck, thereby causing the axial deviation of the guide sleeve, which in turn makes the straightness deviation of the processed center hole large and the scrap rate high.

[0004] Therefore, a technical solution is needed to solve the technical problem that during the processing of the center hole of the ultra-high pressure pipe, an ordinary guide sleeve is used to guide the deep hole drill for final finishing. During the process, the guide sleeve is prone to axial deviation, resulting in a large deviation in the straightness of the center hole. Summary of the invention

[0005] The purpose of the present invention is to overcome the technical problem that in the prior art, the center hole of an ultra-high pressure pipe is machined using an ordinary guide sleeve to guide a deep hole drill for final finishing, during which the guide sleeve is prone to axial deviation, resulting in a large deviation in the straightness of the center hole, and to provide a guide sleeve for deep hole finishing of an ultra-high pressure pipe.

[0006] The present invention provides a deep hole finishing guide sleeve for ultra-high pressure pipes, comprising a valve body, wherein an oil storage cavity is arranged in the valve body, a piston assembly is arranged in the oil storage cavity, the piston assembly is used to connect a tool, a plurality of adjustment cavities are arranged around the outer side wall of the valve body, each of the adjustment cavities is communicated with the oil storage cavity, an adjustment slider is nested in the adjustment cavity, and a plurality of springs are connected between the adjustment slider and the bottom wall of the oil storage cavity.

[0007] The present invention discloses a deep hole finishing guide sleeve for ultra-high pressure pipes. Hydraulic oil is injected into an oil storage chamber. The end of a piston assembly is connected to a tool. A valve body is inserted into an orifice of an inner hole of a pipe to be further finished. Under the squeezing of a clamping spring, an adjusting slide block on the valve body is tightly fitted with the inner hole of the pipe. When the tool is eccentric, the resistance encountered by the valve body during its forward movement acts on the tool rod, and pushes the piston assembly to pressurize the hydraulic oil in the oil storage chamber. Under the action of the hydraulic oil, the adjusting slide block is adaptively displaced, thereby changing the length of the adjusting slide block extending out of the adjusting chamber, correcting the eccentricity of the tool during the machining process, and ensuring the machining quality of the center hole.

[0008] Preferably, it further comprises a detection component, which comprises a plurality of laser rangefinders, and the plurality of laser rangefinders are arranged around the outer wall of the valve body.

[0009] The laser rangefinder can detect the distance from the valve body to the hole wall. By setting up multiple laser rangefinders around the side wall of the valve body to perform distance detection at the same time, when the detected data deviation exceeds a certain value, it means that the axis of the guide sleeve has shifted, which makes it easier to accurately control whether the tool is eccentric. At this time, the position of the slider in the adjustment chamber can be adjusted by hydraulic oil.

[0010] Preferably, the valve body is provided with a plurality of oil delivery channels, the oil delivery channels are arranged in one-to-one correspondence with the adjustment chambers, and the adjustment chambers are connected with the oil storage chamber through the oil delivery channels.

[0011] The adjustment chamber is connected to the oil storage chamber, and the hydraulic oil can be compressed into the adjustment chamber through the oil delivery channel, thereby adjusting the position of the slider.

[0012] Preferably, the oil delivery channel includes an oil inlet section and an oil outlet section which are interconnected, the oil inlet section is connected to the oil storage chamber, the oil outlet section is connected to the outside of the valve body, the oil outlet section is connected to a through section, the through section extends to the adjustment chamber, a tee is provided at the connection between the through section and the oil outlet section, a servo motor is provided at one end of the valve body, and the servo motor is connected to the tee.

[0013] When the guide sleeve is eccentric, the hydraulic oil enters the oil outlet section through the oil inlet section. When the servo motor drives the tee to rotate, when the tee connects the oil inlet section and the adjustment chamber, the hydraulic oil enters the adjustment chamber through the oil outlet section and pushes the adjustment slider to move to the outside of the guide sleeve. When the tee connects the adjustment chamber and the outside of the guide sleeve, the hydraulic oil flows out of the guide sleeve through the oil outlet section to leak out. At this time, the adjustment slider retracts under the pressure of external force.

[0014] Preferably, a plurality of grooves are provided at the end of the valve body, a through hole is provided at the bottom of the groove, the servo motor is arranged in the groove, and the rotating shaft of the servo motor passes through the through hole and is connected to the tee.

[0015] The installation and fixation of the servo motor on the valve body and the connection between the tee and the servo motor are realized, so that the servo motor drives the tee to rotate, thereby controlling the hydraulic oil to enter and exit the adjustment chamber.

[0016] Preferably, an electrical appliance cover is provided at one end of the valve body where the servo motor is arranged.

[0017] The electrical cover protects the servo motor located in the groove at the end of the valve body to prevent hydraulic oil or chips from affecting the normal operation of the servo motor.

[0018] Preferably, the valve body is provided with an integrated circuit board, and the laser rangefinder and the servo motor are both electrically connected to the integrated circuit board.

[0019] The integrated circuit board is arranged in the electrical cover. The integrated circuit board can receive the data collected by the laser rangefinder. When the numerical deviation of each laser rangefinder exceeds a predetermined value, the integrated circuit board will control the servo motor to rotate, so that the hydraulic oil enters the adjustment chamber to actually adjust the position of the adjustment slider, thereby realizing automatic real-time adjustment of the eccentricity of the guide sleeve.

[0020] Preferably, the piston assembly comprises a piston rod, one end of the piston rod is connected to the piston, and the other end of the piston rod is provided with a tapered hole.

[0021] The cutter head of the deep hole processing tool is inserted into the tapered hole of the piston rod. The guide rod of the horizontal lathe is operated to make the tool push the guide sleeve deep into the hole. During the forward movement of the guide sleeve, huge resistance acts on the tool rod and pushes the piston to pressurize the hydraulic pressure in the oil storage chamber, thereby pressing the hydraulic oil into the adjustment chamber.

[0022] Preferably, a sealing gasket is provided on a side of the adjustment slider close to the adjustment cavity, and the sealing gasket abuts against a side wall of the adjustment cavity.

[0023] A sealing gasket is arranged on the end wall of the adjusting slider. When the adjusting slider moves, the sealing gasket abuts against the side walls of the adjusting cavity, thereby strengthening the sealing between the adjusting slider and the adjusting cavity and preventing the hydraulic oil from leaking in the adjusting cavity.

[0024] Preferably, two clamping rings are sleeved on the valve body, and the two clamping rings are respectively arranged on both sides of the adjustment cavity, and limiting steps are respectively provided on both sides of the adjustment slider.

[0025] The clamping ring can limit the limiting steps on both sides of the adjusting slide block within the adjusting cavity to prevent the adjusting slide block from slipping out of the adjusting cavity during the adjustment process.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention provides a deep hole finishing guide sleeve for ultra-high pressure pipes. The resistance encountered by the valve body during the forward movement acts on the tool rod, and pushes the piston assembly to pressurize the hydraulic oil in the oil storage chamber. The adjustment slider undergoes adaptive displacement under the action of the hydraulic oil, thereby changing the length of the adjustment slider extending out of the adjustment chamber, and correcting the eccentricity of the tool during the machining process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a guide sleeve for deep hole finishing of an ultra-high pressure pipe according to the present invention;

[0029] Figure 2 yes Figure 1 Middle AA section view;

[0030] Figure 3 It is a schematic diagram of the structure of the valve body in the AA section view;

[0031] Figure 4 It is a schematic diagram of the structure of the piston assembly in the AA section view;

[0032] Figure 5 It is a schematic diagram of the structure of the adjustment slider in the AA section view;

[0033] Figure 6 yes Figure 2 Enlarged view of area B in the middle;

[0034] Figure 7 It is a structural schematic diagram of the three-way connection of the present invention;

[0035] Figure 8 yes Figure 7 Middle CC section view;

[0036] Markings in the figure:

[0037] 1-valve body, 11-oil storage chamber, 12-adjusting chamber, 13-oil delivery channel, 131-oil inlet section, 132-oil outlet section, 133-through section, 14-tail cover flange, 141-oil filling valve, 2-piston assembly, 21-piston rod, 211-conical hole, 22-piston, 3-adjusting slider, 31-limiting step, 32-sealing gasket, 4-spring, 5-detection assembly, 51-laser rangefinder, 6-tee, 61-adjusting hole, 62-oil inlet hole, 63-oil outlet hole, 64-check valve, 7-servo motor, 8-electrical cover, 9-integrated circuit board, 10-clamp ring. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0039] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0040] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0041] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0042] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0043] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0044] Example 1

[0045] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the present embodiment is a guide sleeve for deep hole finishing of ultra-high pressure pipes, comprising a valve body 1, an oil storage chamber 11 being provided in the valve body 1, a piston assembly 2 being provided in the oil storage chamber 11, the piston assembly 2 being used to connect a tool, a plurality of adjustment chambers 12 being arranged around the outer wall of the valve body 1, each of the adjustment chambers 12 being communicated with the oil storage chamber 11, an adjustment slider 3 being nested in the adjustment chamber 12, and a plurality of springs 4 being connected between the adjustment slider 3 and the bottom wall of the oil storage chamber 11.

[0046] In the present embodiment, a deep hole finishing guide sleeve for ultra-high pressure pipes is provided with a tail cover flange 14 at one end of the valve body 1, and an oil filling valve 141 is provided on the tail cover flange 14. Hydraulic oil is injected into the oil storage chamber 11 through the oil filling valve 141. The end of the piston assembly 2 is connected to the tool, and the valve body 1 is inserted into the orifice of the inner hole of the pipe to be further finished. Under the squeezing of the clamping spring 4, the adjusting slider 3 on the valve body 1 fits tightly with the inner hole of the pipe. When the tool is eccentric, the resistance encountered by the valve body 1 during the forward movement acts on the tool rod, and pushes the piston assembly 2 to pressurize the hydraulic oil in the oil storage chamber 11. The adjusting slider 3 is adaptively displaced under the action of the hydraulic oil, thereby changing the length of the adjusting slider 3 extending out of the adjusting chamber 12, correcting the eccentricity of the tool during the machining process, and ensuring the machining quality of the center hole.

[0047] Oil delivery channel 13: The valve body 1 is provided with a plurality of oil delivery channels 13, and the oil delivery channels 13 are arranged one by one with the adjustment chamber 12. The oil delivery channel 13 includes an oil inlet section 131 and an oil outlet section 132 which are connected to each other. The oil inlet section 131 is connected to the oil storage chamber 11, and the oil outlet section 132 is connected to the outside of the valve body 1. The oil outlet section 132 is connected to a through section 133, and the through section 133 extends to the adjustment chamber 12. The through section 13 A tee 6 is provided at the connection between the guide sleeve 3 and the oil outlet section 132. An adjustment hole 61 is provided at one end of the tee, and a servo motor 7 is connected to the other end. An oil inlet hole 62 and an oil outlet hole 63 are provided on the side wall of the tee 6. A check valve 64 is provided on the oil inlet hole 62 and the oil outlet hole 63, respectively. The setting of the check valve 64 allows the hydraulic oil to enter the tee 6 only through the oil inlet hole 62, or the hydraulic oil entering the tee 6 is discharged through the oil outlet hole 63. When the guide sleeve is eccentric: the servo motor 7 is used to adjust the guide sleeve 3. The motor 7 drives the tee 6 to rotate a specific angle, so that the oil inlet hole 62 of the tee 6 is aligned with the side of the oil outlet section 132 connected to the oil inlet section 131. At this time, the hydraulic oil in the oil storage chamber 11 enters the front part of the oil outlet section 132 through the oil inlet section 131, and then enters the inside of the tee 6 through the one-way valve 64 in the oil inlet hole 62 of the tee 6, and then enters the through section 133 through the adjustment hole 61 of the tee 6, and finally enters the adjustment chamber 12 and pushes the adjustment slider 3 to move toward the outside of the guide sleeve. When the adjustment slider 3 on one side moves outward, the servo motor 7 on the opposite side will also drive the tee 6 to rotate a specific angle, so that the oil outlet hole 63 of the tee 6 is aligned with the side of the oil outlet section 132 connected to the outside. At this time, the hydraulic oil in the adjustment chamber 12 is input into the tee 6 through the through section 133, and then enters the one side of the oil outlet section 132 connected to the outside through the one-way valve 64 in the oil outlet hole 63 of the tee 6 to realize the leakage of the hydraulic oil. At this time, the adjustment slider 3 is squeezed and retracted by the external force.

[0048] The servo motor 7 is arranged on the valve body 1: a plurality of grooves are arranged at the end of the valve body 1, and a through hole is arranged at the bottom of the groove. The servo motor 7 is arranged in the groove, and the rotating shaft of the servo motor 7 passes through the through hole and is connected to the tee 6. An electrical cover 8 is provided at one end of the valve body 1 where the servo motor 7 is arranged. The electrical cover 8 protects the servo motor 7 located in the groove at the end of the valve body 1 to prevent hydraulic oil or chips from affecting the normal operation of the servo motor.

[0049] Piston assembly 2: The piston assembly 2 includes a piston rod 21, one end of the piston rod 21 is connected to a piston 22, and the other end is provided with a tapered hole 211. The tool head of the deep hole processing tool is inserted into the tapered hole 211 of the piston rod 21. The horizontal car guide rod is operated to make the tool push the guide sleeve deep into the hole. In the process of the guide sleeve moving forward, a huge resistance acts on the tool rod, and pushes the piston to pressurize the hydraulic pressure in the oil storage chamber, thereby pressing the hydraulic oil into the adjustment chamber.

[0050] Sealing of the adjustment chamber 12: A sealing gasket 32 ​​is provided on the side of the adjustment slider 3 close to the adjustment chamber 12. When the adjustment slider 3 moves, the sealing gasket 32 ​​abuts against the side walls of the adjustment chamber 12 to strengthen the sealing between the adjustment slider 3 and the adjustment chamber 12 and prevent leakage of hydraulic oil in the adjustment chamber 12.

[0051] Limiting the adjusting slider 3: Two clamping rings 10 are sleeved on the valve body 1, and the two clamping rings 10 are respectively arranged on both sides of the adjusting cavity 12. Limiting steps 31 are respectively provided on both sides of the adjusting slider 3. The clamping rings 10 can limit the limiting steps 31 on both sides of the adjusting slider 3 in the adjusting cavity 12 to prevent the adjusting slider 3 from slipping out of the adjusting cavity 12 during the adjustment process.

[0052] Example 2

[0053] like Figure 1 and Figure 2 As shown, the present embodiment is different from the embodiment 1 in that it further comprises a detection component 5 , and the detection component 5 comprises a plurality of laser rangefinders 51 , and the plurality of laser rangefinders 51 are arranged around the outer wall of the valve body 1 .

[0054] In this embodiment, the laser rangefinder 51 can detect the distance from the valve body 1 to the hole wall. By arranging multiple laser rangefinders 51 around the side wall of the valve body 1 to simultaneously detect the distance, when the detected data deviation exceeds a certain value, it indicates that the axis of the guide sleeve has been offset, thereby facilitating accurate control of whether the tool is eccentric. At this time, the position of the adjustment slider 3 in the adjustment chamber 12 can be adjusted by hydraulic oil.

[0055] Example 3

[0056] like Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the difference from Embodiment 2 is that the valve body 1 is provided with an integrated circuit board 9 , and the laser rangefinder 51 and the servo motor 7 are both electrically connected to the integrated circuit board 9 .

[0057] In this embodiment, the integrated circuit board 9 is arranged in the electrical cover 8. The integrated circuit board 9 can receive the data collected by the laser rangefinder 51. When the numerical deviation of each laser rangefinder 51 exceeds a predetermined value, the integrated circuit board 9 will control the servo motor 7 to rotate, so that the hydraulic oil enters the adjustment chamber 12 to actually adjust the position of the adjustment slider 3, thereby realizing automatic real-time adjustment of the eccentricity of the guide sleeve.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A deep hole finishing guide sleeve for ultra-high pressure pipes, characterized in that: The invention comprises a valve body (1), wherein an oil storage chamber (11) is provided in the valve body (1), wherein a piston assembly (2) is provided in the oil storage chamber (11), wherein the piston assembly (2) is used to connect a tool, wherein a plurality of adjustment chambers (12) are arranged around the outer wall of the valve body (1), wherein each of the adjustment chambers (12) is communicated with the oil storage chamber (11), wherein an adjustment slider (3) is nested in the adjustment chamber (12), wherein a plurality of springs (4) are connected between the adjustment slider (3) and the bottom wall of the oil storage chamber (11), and further comprises a detection assembly (5), wherein the detection assembly (5) comprises a plurality of laser rangefinders (51), wherein the plurality of laser rangefinders (51) are arranged around the outer wall of the valve body (1), wherein the valve body (1) is provided with a plurality of oil delivery channels (13), wherein the plurality of The oil delivery channel (13) is arranged in a one-to-one correspondence with the adjustment chamber (12); the adjustment chamber (12) is connected to the oil storage chamber (11) through the oil delivery channel (13); the oil delivery channel (13) comprises an oil inlet section (131) and an oil outlet section (132) which are connected to each other; the oil inlet section (131) is connected to the oil storage chamber (11); the oil outlet section (132) is connected to the outside of the valve body (1); the oil outlet section (132) is connected to a through section (133); the through section (133) extends to the adjustment chamber (12); a tee (6) is provided at the connection between the through section (133) and the oil outlet section (132); a servo motor (7) is provided at one end of the valve body (1); the servo motor (7) is connected to the tee (6).

2. The ultra-high pressure pipe deep hole finishing guide sleeve according to claim 1, characterized in that: The end of the valve body (1) is provided with a plurality of grooves, the bottom of the grooves is provided with through holes, the servo motor (7) is arranged in the grooves, and the rotating shaft of the servo motor (7) passes through the through holes and is connected to the tee (6).

3. The ultra-high pressure pipe deep hole finishing guide sleeve according to claim 2, characterized in that: An electrical appliance cover (8) is provided at one end of the valve body (1) where the servo motor (7) is arranged.

4. The ultra-high pressure pipe deep hole finishing guide sleeve according to claim 1, characterized in that: The valve body (1) is provided with an integrated circuit board (9), and the laser rangefinder (51) and the servo motor (7) are both electrically connected to the integrated circuit board (9).

5. A guide sleeve for deep hole finishing of ultra-high pressure pipe according to any one of claims 1 to 4, characterized in that: The piston assembly (2) comprises a piston rod (21), one end of the piston rod (21) is connected to a piston (22), and the other end of the piston rod (21) is provided with a tapered hole (211).

6. A guide sleeve for deep hole finishing of ultra-high pressure pipe according to any one of claims 1 to 4, characterized in that: A sealing gasket (32) is provided on a side of the adjustment sliding block (3) close to the adjustment cavity (12), and the sealing gasket (32) abuts against a side wall of the adjustment cavity (12).

7. A guide sleeve for deep hole finishing of ultra-high pressure pipe according to any one of claims 1 to 4, characterized in that: Two clamping rings (10) are sleeved on the valve body (1), and the two clamping rings (10) are respectively arranged on both sides of the adjustment cavity (12), and limiting steps (31) are respectively provided on both sides of the adjustment slide block (3).

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