A high pressure union for oil mining

Abstract

The present invention provides a high-pressure union for oil production, and relates to the technical field of oil drilling accessories, including a union female head and a union male head that are butted against each other, a union disk is arranged outside the union female head and the union male head, the outer wall of the union female head is slidably connected to the inner wall of the union disk, a clamping ring groove is arranged inside the union disk, a connecting groove is arranged along the axial direction of the union disk on the inner wall of the union disk, one end of the connecting groove is connected to the clamping ring groove, and the other end of the connecting groove is connected to the outside of the union disk, a clamping block adapted to the connecting groove is arranged on the outer wall of the union female head, and the outer wall of the clamping block is slidably connected to the inner wall of the connecting groove. In the present invention, the union female head is clamped with the clamping ring groove inside the union disk through the clamping block, so that the union female head and the union disk are quickly connected, and the union female head can be quickly disassembled by simply rotating the union female head so that the clamping block is aligned with the connecting groove, thereby improving the disassembly and assembly efficiency of the high-pressure union and greatly reducing the labor intensity of the staff.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling accessories, in particular to a high-pressure union for oil mining. Background Art

[0002] Union, also known as union joint or oil union, is a mechanical component used to connect pipes or equipment. It is mainly used for joint connection and is widely used in high-pressure fluid operations and equipment matching such as drilling, cementing, logging, oil testing, acid fracturing, coiled tubing and sand control operations in the oil and natural gas industries. Union can be used in various standard working environments and acidic working environments and withstand higher working pressures.

[0003] The Chinese patent with the authorization announcement number CN110952968B discloses a high fatigue life type ultra-high pressure fracturing union joint, which is mainly composed of a female joint with a connecting external thread, a wing nut with a connecting internal thread and an anti-loosening internal thread, a fan-shaped ferrule with an anti-loosening external thread, a male joint, an hourglass-shaped sealing ring and a baffle. The fan-shaped ferrule is sleeved in the slot of the male joint, and the inner ring surface of the fan-shaped ferrule contacts the outer ring surface of the slot; the anti-loosening internal thread on the wing nut and the anti-loosening external thread on the fan-shaped ferrule are meshed with each other, and the inner arc surface of the wing nut contacts the spherical arc surface of the ferrule; the baffle is inserted into the fan-shaped ferrule retaining groove; the connecting external thread of the female joint and the connecting internal thread of the wing nut are meshed with each other; the 45° sealing cone surface between the end face of the female joint and the inner hole is in hard contact with the 45° sealing cone surface of the end face of the male joint to form a sealing surface, and the end face below the sealing surface presses the hourglass-shaped sealing ring. The union joint of the present invention has a reasonable and compact structure, which improves its fatigue resistance, anti-loosening performance and sealing performance.

[0004] However, in the above-mentioned union joint, the female joint and the wing nut are connected by threads, but the threaded connection method requires a large number of turns during disassembly and installation, and the disassembly and installation require a long time, and the female joint and the wing nut cannot be quickly disassembled and assembled. Summary of the invention

[0005] The invention provides a high-pressure union for oil mining, which is used to solve the technical problem that a female joint and a wing nut in a current union joint are connected by threads, but the threaded connection method requires a large number of rotations during disassembly and installation, and the disassembly and installation takes a long time, and the female joint and the wing nut cannot be quickly disassembled and installed.

[0006] In order to solve the above technical problems, the present invention discloses a high-pressure union for oil mining, comprising: a union female and a union male that are butted against each other, a union disk is arranged outside the union female and the union male, the outer wall of the union female is slidably connected with the inner wall of the union disk, a clamping ring groove is arranged inside the union disk, a connecting groove is arranged on the inner wall of the union disk along the axial direction of the union disk, one end of the connecting groove is communicated with the clamping ring groove, and the other end of the connecting groove is communicated with the outside of the union disk, a clamping block matched with the connecting groove is arranged on the outer wall of the union female, and the outer wall of the clamping block is slidably connected with the inner wall of the connecting groove.

[0007] Preferably, a limit baffle is provided on the inner wall of the snap ring groove.

[0008] Preferably, a plurality of protrusions are provided on the outer wall of the union disk, and the plurality of protrusions are distributed in a ring array about the central axis of the union disk.

[0009] Preferably, a sealing baffle ring is provided on the outer wall of the female union, and the sealing baffle ring is located at an end of the female union away from the male union.

[0010] Preferably, a fixing ring is provided on the inner wall of one end of the union disk away from the female union, the fixing ring and the union disk are integrally formed, a through hole is provided at the center of the fixing ring, the outer wall of the male union is slidably connected with the inner wall of the through hole, a flange is provided on one end of the male union close to the female union, and the flange is in contact with the inner wall of the fixing ring away from the female union.

[0011] Preferably, a first chamfer is provided on the outer wall of the flange near one end of the female union, and a second chamfer corresponding to the first chamfer is provided on the inner wall of the female union near one end of the male union, and the second chamfer is adapted to the first chamfer.

[0012] Preferably, a first sealing groove is arranged in the first chamfer, a first sealing ring is arranged in the first sealing groove, and a second sealing groove corresponding to the first sealing groove is arranged in the second chamfer.

[0013] Preferably, a third sealing groove is provided on the sealing baffle ring near the union disk, a fourth sealing groove corresponding to the third sealing groove is provided on one end of the union disk near the sealing baffle ring, and a second sealing ring is provided in the fourth sealing groove.

[0014] Preferably, a plurality of first sliding holes are horizontally arranged in the sealing retaining ring, and the plurality of first sliding holes are distributed in a circular array about the central axis of the sealing retaining ring. One end of the first sliding hole is connected to the third sealing groove, and the other end of the first sliding hole passes through the side of the sealing retaining ring away from the union disk. An extrusion rod is slidably arranged in the first sliding hole, and one end of the extrusion rod extends into the third sealing groove and an extrusion plate is arranged. A first spring is sleeved on the outside of the extrusion rod, one end of the first spring is connected to the extrusion plate, and the other end of the first spring is connected to the inner wall of the third sealing groove.

[0015] Preferably, a pull rod is provided at one end of the extrusion rod away from the third sealing groove, and the pull rod extends to the outside of the first sliding hole away from one end of the extrusion rod and is provided with a pull plate.

[0016] The technical solution of the present invention has the following advantages: The present invention provides a high-pressure union for oil mining, which relates to the technical field of oil drilling accessories, including a union female and a union male that are butted against each other, a union disk is arranged outside the union female and the union male, the outer wall of the union female is slidably connected to the inner wall of the union disk, a clamping ring groove is arranged inside the union disk, a connecting groove is arranged along the axial direction of the union disk on the inner wall of the union disk, one end of the connecting groove is connected to the clamping ring groove, and the other end of the connecting groove is connected to the outside of the union disk, a clamping block adapted to the connecting groove is arranged on the outer wall of the union female, and the outer wall of the clamping block is slidably connected to the inner wall of the connecting groove. In the present invention, the union female is clamped with the clamping ring groove inside the union disk through the clamping block, so that the union female and the union disk are quickly connected, and the union female can be quickly disassembled by simply rotating the union female so that the clamping block is aligned with the connecting groove, thereby improving the disassembly and assembly efficiency of the high-pressure union and greatly reducing the labor intensity of the staff.

[0017] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the devices particularly pointed out in the written description and the drawings of the description.

[0018] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a high-pressure union for oil mining according to the present invention;

[0021] Figure 2 It is a schematic diagram of the connection of the union plate, the female union and the male union in the present invention;

[0022] Figure 3 For the present invention Figure 2 A magnified view of the structure at center;

[0023] Figure 4 It is a schematic diagram of the sealing retaining ring structure in the present invention;

[0024] Figure 5 For the present invention Figure 4 A magnified view of the structure at B in the middle;

[0025] Figure 6 For the present invention Figure 4 Enlarged view of the structure at point C in the middle.

[0026] In the figure: 1, female union; 2, male union; 3, union plate; 4, snap ring groove; 5, connecting groove; 6, snap block; 7, limit baffle; 8, convex block; 9, sealing baffle ring; 10, first chamfer; 11, second chamfer; 12, first sealing groove; 13, first sealing ring; 14, second sealing groove; 15, third sealing groove; 16, fourth sealing groove; 17, second sealing ring; 18, first sliding hole; 19, extrusion rod; 20, extrusion Plate; 21. first spring; 22. pull rod; 23. pull plate; 24. second sliding hole; 25. sliding rod; 26. second spring; 27. first drive hole; 28. second drive hole; 29. ​​sliding cavity; 30. drive block; 31. clamping plate; 32. sealing cavity; 33. sealing hole; 34. mounting tube; 35. piston plate; 36. clamping rod; 37. pressure block; 38. piston rod; 39. piston block; 40. third spring; 41. pipeline. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0028] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] Example 1

[0030] The embodiment of the present invention provides a high pressure union for oil mining, such as Figure 1-Figure 6 As shown, it includes: a female union 1 and a male union 2 that are butt-jointed with each other, a union disc 3 is arranged outside the female union 1 and the male union 2, the outer wall of the female union 1 is slidably connected with the inner wall of the union disc 3, a clamping ring groove 4 is arranged inside the union disc 3, a connecting groove 5 is arranged on the inner wall of the union disc 3 along the axial direction of the union disc 3, one end of the connecting groove 5 is communicated with the clamping ring groove 4, and the other end of the connecting groove 5 is communicated with the outside of the union disc 3, a clamping block 6 adapted to the connecting groove 5 is arranged on the outer wall of the female union 1, and the outer wall of the clamping block 6 is slidably connected with the inner wall of the connecting groove 5.

[0031] The working principle and beneficial effects of the above technical solution are as follows: first, install the male union 2 in the union disc 3, then align the clamping block 6 of the female union 1 with the connecting groove 5, and push the female union 1 so that the clamping block 6 is inserted into the connecting groove 5, the clamping block 6 slides along the connecting groove 5, the outer wall of the female union 1 slides along the inner wall of the union disc 3, and after the end of the female union 1 contacts the end of the male union 2, the clamping block 6 slides into the clamping ring groove 4. At this time, rotate the female union 1 or the union disc 3 so that the connecting groove 5 is not in the same straight line with the clamping block 6. At this time, the union female 1 cannot be separated from the union plate 3, so the union female 1 and the union plate 3 are quickly installed, and the union female 1 can be connected to the pipeline 41. When disassembly is required, the union plate 3 is rotated so that the connecting groove 5 in the union plate 3 and the clamping block 6 are in the same straight line, and then the union plate 3 is pulled so that the clamping block 6 slides along the connecting groove 5 to the outside of the union plate 3. At this time, the union plate 3 is quickly separated from the union female 1, so that the two can be quickly disassembled. In the present invention, the union female head 1 is clamped with the clamping ring groove 4 inside the union disc 3 through the clamping block 6, so that the union female head 1 and the union disc 3 are quickly connected, and the union female head 1 can be quickly disassembled by simply rotating the union female head 1 so that the clamping block 6 is aligned with the connecting groove 5. Compared with the existing bolt connection, the disassembly and assembly speed is accelerated, the disassembly and assembly efficiency of the high-pressure union is improved, and the labor intensity of the staff is greatly reduced. In addition, through the connection between the clamping block 6 and the clamping ring groove 4, the problem of thread wear due to frequent disassembly and assembly will not occur, thereby extending the service life of the high-pressure union.

[0032] Example 2

[0033] On the basis of the above-mentioned embodiment 1, Figure 1 As shown, a limit baffle 7 is provided on the inner wall of the clamping ring groove 4.

[0034] The working principle and beneficial effects of the above technical solution are as follows: the angle between the limit baffle 7 and the connecting groove 5 is greater than 45 degrees and does not exceed 90 degrees, the limit baffle 7 is used to block the clamping block 6, and when the union plate 3 is rotated to make the limit baffle 7 contact, the union plate 3 can be stopped from rotating to ensure that the clamping block 6 is installed in place, thereby improving the stability of the connection between the union plate 3 and the union female head 1 and avoiding the union plate 3 and the union female head 1 from being separated due to slight rotation.

[0035] Example 3

[0036] On the basis of Example 1 or 2, Figure 1 As shown, a plurality of protrusions 8 are arranged on the outer wall of the union disk 3 , and the plurality of protrusions 8 are distributed in a ring array about the central axis of the union disk 3 .

[0037] The working principle and beneficial effects of the above technical solution are as follows: by providing the protrusion 8, the union plate 3 can be easily rotated.

[0038] Example 4

[0039] On the basis of any one of Examples 1-3, Figure 1 As shown, a sealing baffle ring 9 is provided on the outer wall of the female union 1 , and the sealing baffle ring 9 is located at an end of the female union 1 away from the male union 2 .

[0040] The working principle and beneficial effects of the above technical solution are as follows: when the clamping block 6 slides into the clamping ring groove 4, the sealing baffle ring 9 on the outer wall of the union female head 1 contacts the end of the union sleeve, so that the position of the clamping block 6 can be intuitively judged, and the sealing baffle ring 9 can seal the end of the union sleeve to prevent the internal fluid from flowing out through the connecting groove 5 or the gap between the union sleeve and the union female head 1, thereby improving the sealing performance.

[0041] Example 5

[0042] On the basis of any one of Examples 1-4, Figure 1 As shown, a fixing ring is arranged on the inner wall of one end of the union disc 3 away from the female union 1, the fixing ring and the union disc 3 are integrally formed, a through hole is arranged at the center of the fixing ring, the outer wall of the male union 2 is slidably connected with the inner wall of the through hole, a flange is arranged on one end of the male union 2 close to the female union 1, and the flange is in contact with the inner wall of the fixing ring on the side away from the female union 1.

[0043] The working principle and beneficial effects of the above technical solution are as follows: when installing the male union 2, first align the end of the male union 2 away from the flange with the through hole in the center of the fixing ring, and then insert the male union 2 into the union disk 3, so that the end of the male union 2 extends out from the through hole, and the side of the flange away from the female union 1 contacts the inner wall of the fixing ring. Under the action of the fixing ring, the male union 2 is installed in the union disk 3 and will not fall out from the through hole, thereby improving the reliability of the male union 2.

[0044] Example 6

[0045] On the basis of Example 5, Figure 1-Figure 3 As shown, a first chamfer 10 is provided on the outer wall of the flange near the female union 1 , and a second chamfer 11 corresponding to the first chamfer 10 is provided on the inner wall of the female union 1 near the male union 2 , and the second chamfer 11 is adapted to the first chamfer 10 .

[0046] The working principle and beneficial effects of the above technical solution are as follows: after the male union 2 is installed, the female union 1 is inserted into the union disk 3, and when the clamping block 6 slides to the clamping ring groove 4, the first chamfer 10 of the outer wall of the flange of the male union 2 contacts the second chamfer 11 of the inner wall of the female union 1, thereby realizing the docking of the male union 2 and the female union 1. Through the contact between the first chamfer 10 and the second chamfer 11, the sealing performance of the connection between the male union 2 and the female union 1 is improved.

[0047] Example 7

[0048] On the basis of Example 6, Figure 3 As shown, a first sealing groove 12 is arranged in the first chamfer 10 , a first sealing ring 13 is arranged in the first sealing groove 12 , and a second sealing groove 14 corresponding to the first sealing groove 12 is arranged in the second chamfer 11 .

[0049] The working principle and beneficial effects of the above technical solution are as follows: when installing the male union 2, first install the first sealing ring 13 in the first sealing groove 12 of the male union 2, and after installing the male union 2 on the union disk 3, install the female union 1, and the second sealing groove 14 of the female union 1 contacts with the first sealing ring 13, and the sealing performance between the female union 1 and the male union 2 is further improved by the first sealing ring 13, and under the elastic action of the first sealing ring 13, the clamping block 6 contacts with the inner wall of the clamping ring groove 4 more closely, so as to prevent the union disk 3 from easily rotating outside the female union 1, thereby improving the stability of the union disk 3.

[0050] Example 8

[0051] On the basis of any one of Examples 4-7, Figure 4 , Figure 5 As shown, a third sealing groove 15 is provided on the sealing retaining ring 9 near the union disk 3 , a fourth sealing groove 16 corresponding to the third sealing groove 15 is provided on the end of the union disk 3 near the sealing retaining ring 9 , and a second sealing ring 17 is provided in the fourth sealing groove 16 .

[0052] The working principle and beneficial effects of the above technical solution are as follows: a second sealing ring 17 is arranged between the sealing baffle ring 9 and the union disk 3, and the second sealing ring 17 can prevent the fluid flowing out of the union disk 3 from leaking from between the sealing baffle ring 9 and the union disk 3, thereby further improving the sealing performance of the high-pressure union as a whole. The second sealing ring 17 is elastic, and the elastic second sealing ring 17 can further make the clamping block 6 contact with the side wall of the clamping ring groove 4, thereby preventing the union disk 3 from rotating easily, thereby improving the reliability of the connection between the union disk 3 and the union female head 1.

[0053] Example 9

[0054] On the basis of Example 8, Figure 4 , Figure 5 As shown, a plurality of first sliding holes 18 are horizontally arranged in the sealing retaining ring 9, and the plurality of first sliding holes 18 are distributed in a circular array about the central axis of the sealing retaining ring 9, one end of the first sliding hole 18 is connected with the third sealing groove 15, and the other end of the first sliding hole 18 passes through the sealing retaining ring 9 away from the side of the union disk 3, an extrusion rod 19 is slidably arranged in the first sliding hole 18, one end of the extrusion rod 19 extends into the third sealing groove 15 and an extrusion plate 20 is arranged, a first spring 21 is sleeved on the outside of the extrusion rod 19, one end of the first spring 21 is connected to the extrusion plate 20, and the other end of the first spring 21 is connected to the inner wall of the third sealing groove 15.

[0055] The working principle and beneficial effects of the above technical solution are as follows: when the sealing retaining ring 9 moves close to the union disk 3, the extrusion plate 20 first contacts the second sealing ring 17 in the fourth sealing groove 16, and then with the movement of the union female head 1, the extrusion plate 20 drives the extrusion rod 19 to slide in the first sliding hole 18, and the first spring 21 is compressed. When the sealing retaining ring 9 contacts the union disk 3, under the action of the first spring 21, the second sealing ring 17 is squeezed between the third sealing groove 15 and the fourth sealing groove 16, further improving the sealing effect. When the clamping block 6 contacts the inner wall of the clamping ring groove 4, under the action of the elastic force of the first spring 21, the pressure of the clamping block 6 on the clamping ring groove 4 can be increased, thereby increasing friction, preventing the union disk 3 from rotating at will, and improving the reliability of the connection between the union disk 3 and the union female head 1.

[0056] Example 10

[0057] On the basis of Example 9, Figure 4 , Figure 5 As shown, a pull rod 22 is provided at one end of the extrusion rod 19 away from the third sealing groove 15 , and the pull rod 22 extends to the outside of the first sliding hole 18 at one end away from the extrusion rod 19 and is provided with a pull plate 23 .

[0058] The working principle and beneficial effects of the above technical solution are as follows: when the union plate 3 needs to be rotated, the pulling plate 23 can be pulled to drive the extrusion rod 19 to slide in the first sliding hole 18 in a direction away from the second sealing ring 17, so that the extrusion plate 20 is separated from the outer wall of the second sealing ring 17, thereby reducing the extrusion of the second sealing ring 17. At this time, the union plate 3 can be rotated, which is convenient for the quick disassembly and assembly of the union plate 3.

[0059] Embodiment 11

[0060] On the basis of Example 10, Figure 4-Figure 6As shown, a plurality of second sliding holes 24 are provided in the sealing retaining ring 9, and the second sliding holes 24 correspond to the first sliding holes 18 one by one, and the second sliding holes 24 are perpendicular to the first sliding holes 18. A sliding rod 25 is slidably provided in the second sliding hole 24, and the end of the sliding rod 25 away from the union female 1 is connected to the inner wall of the second sliding hole 24 through a second spring 26. A first driving hole 27 and a second driving hole 28 are provided in the sliding rod 25, and the first driving hole 27 is communicated with the first sliding hole 18. A first driving hole 27 is provided on the side close to the union female 1. The extrusion rod 19 is provided with a second inclined surface corresponding to the first inclined surface at one end away from the third sealing groove 15, and the end of the extrusion rod 19 slides along the first inclined surface through the second inclined surface. The second driving hole 28 is located inside the end of the sliding rod 25 away from the union female head 1, and the second driving hole 28 is provided with a third inclined surface on the side away from the union female head 1. A sliding cavity 29 connected to the second driving hole 28 is provided in the sealing retaining ring 9, and a driving block 30 is slidably provided in the sliding cavity 29. The driving block 30 is provided with a third inclined surface on the side close to the sliding rod 25. Corresponding to the fourth inclined surface, a plurality of clamping plates 31 corresponding to the second sliding holes 24 are arranged on the side of the sealing retaining ring 9 away from the union disc 3, a sealing cavity 32 is arranged in the clamping plate 31 along the length direction of the clamping plate 31, and a plurality of sealing holes 33 are arranged at equal intervals on the side of the clamping plate 31 close to the union female head 1, one end of the sealing hole 33 is connected with the sealing cavity 32, an internal thread is arranged on the inner wall of the sealing hole 33, a mounting tube 34 is arranged in the sealing hole 33, an external thread is arranged on the outer wall of the mounting tube 34, the mounting tube 34 is connected to the sealing hole 33 by threads, and a sliding device is arranged inside the mounting tube 34 A piston plate 35 is disposed, a clamping rod 36 is disposed at one end of the piston plate 35 away from the sealing chamber 32, a pressure block 37 is disposed at one end of the clamping rod 36 away from the piston plate 35, a piston rod 38 is disposed at one end of the driving block 30 away from the sliding rod 25, the piston rod 38 extends into the sealing chamber 32 at one end away from the driving block 30 and is provided with a piston block 39, the outer wall of the piston block 39 is slidably connected to the inner wall of the sealing chamber 32, a third spring 40 is sleeved on the outside of the piston rod 38, one end of the third spring 40 is connected to the piston block 39, and the other end of the third spring 40 is connected to the inner wall of the sealing chamber 32.

[0061] The working principle and beneficial effects of the above technical solution are as follows: during the process of inserting the union 1 into the union plate 3, as the extrusion rod 19 slides in the first sliding hole 18, the extrusion rod 19 can slide along the first inclined surface in the first driving hole 27 through the second inclined surface, driving the sliding rod 25 to slide in the second sliding hole 24 close to the outer wall of the union 1, and the second spring 26 is stretched. At the same time, the second driving hole 28 moves with the sliding rod 25, and the second driving hole 28 drives the driving block through the sliding cooperation between the third inclined surface and the fourth inclined surface. The piston block 39 slides in the sealing chamber 32 through the piston rod 38. The sealing chamber 32 stores gas. When the piston block 39 slides, it can push the gas in the sealing chamber 32, so that the gas enters the sealing hole 33 through the sealing chamber 32. The sealing hole 33 is set toward the pipeline 41. The gas entering the sealing hole 33 can push the piston plate 35 in the installation pipe 34 to slide. The piston plate 35 drives the pressing block 37 to slide toward the outer wall of the pipeline 41 through the clamping rod 36 until the pressing block 37 is aligned with the pipeline 41. The outer wall of the pipe 41 abuts against the outer wall of the pipe 41. At this time, the outer wall of the pipe 41 is pressed by multiple pressing blocks 37 to enhance the reliability of the connection between the pipe 41 and the union female head 1, and avoid the pipe 41 and the union female head 1 from being separated or rotating relative to each other. A connecting ring is arranged between the multiple clamping plates 31. The diameter of the central hole of the connecting ring is larger than the diameter of the pipe 41. The outer wall of the connecting ring is connected to the side of the multiple clamping plates 31 close to the pipe 41, which can improve the stability of the clamping plates 31 and ensure that the multiple pressing blocks 37 stably press the outer wall of the pipe 41. When the union female head 1 needs to be disassembled, First pull the pull rod 22, then rotate the union plate 3 so that the connecting groove 5 is aligned with the clamping block 6, and then pull the union plate 3 to move away from the union female head 1, and the sealing retaining ring 9 is gradually separated from the union plate 3. Under the action of the first spring 21, the extrusion plate 20 returns to its original position, and under the action of the second spring 26, the sliding rod 25 returns to its original position. Under the action of the third spring 40, the driving block 30 returns to its original position. At this time, the pressure of the pressure block 37 on the outer wall of the pipe 41 is reduced, and the union female head 1 can be disassembled, so that the union female head 1 is separated from the pipe 41.

[0062] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0063] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A high pressure union for oil mining, characterized in that: include: A female union (1) and a male union (2) are connected to each other, a union disc (3) is arranged outside the female union (1) and the male union (2), the outer wall of the female union (1) is slidably connected to the inner wall of the union disc (3), a clamping ring groove (4) is arranged inside the union disc (3), a connecting groove (5) is arranged on the inner wall of the union disc (3) along the axial direction of the union disc (3), one end of the connecting groove (5) is connected to the clamping ring groove (4), and the other end of the connecting groove (5) is connected to the outside of the union disc (3), a clamping block (6) matched with the connecting groove (5) is arranged on the outer wall of the female union (1), and the outer wall of the clamping block (6) is slidably connected to the inner wall of the connecting groove (5); A sealing baffle ring (9) is provided on the outer wall of the female union (1), and the sealing baffle ring (9) is located at an end of the female union (1) away from the male union (2); A third sealing groove (15) is provided on one side of the sealing baffle ring (9) close to the union disk (3), a fourth sealing groove (16) corresponding to the third sealing groove (15) is provided on one end of the union disk (3) close to the sealing baffle ring (9), and a second sealing ring (17) is provided in the fourth sealing groove (16); A plurality of first sliding holes (18) are horizontally arranged in the sealing retaining ring (9), and the plurality of first sliding holes (18) are distributed in a ring array about the central axis of the sealing retaining ring (9), one end of the first sliding hole (18) is communicated with the third sealing groove (15), and the other end of the first sliding hole (18) penetrates the sealing retaining ring (9) away from the side of the union disk (3), an extrusion rod (19) is slidably arranged in the first sliding hole (18), one end of the extrusion rod (19) extends into the third sealing groove (15) and an extrusion plate (20) is arranged, and a first spring (21) is sleeved on the outside of the extrusion rod (19), one end of the first spring (21) is connected to the extrusion plate (20), and the other end of the first spring (21) is connected to the inner wall of the third sealing groove (15); A pull rod (22) is arranged at one end of the extrusion rod (19) away from the third sealing groove (15); the pull rod (22) extends to the outside of the first sliding hole (18) at one end away from the extrusion rod (19) and is provided with a pull plate (23); A plurality of second sliding holes (24) are arranged in the sealing retaining ring (9), the second sliding holes (24) correspond to the first sliding holes (18) one by one, the second sliding holes (24) are perpendicular to the first sliding holes (18), a sliding rod (25) is arranged in the second sliding hole (24) for sliding, the end of the sliding rod (25) away from the union female head (1) is connected to the inner wall of the second sliding hole (24) through a second spring (26), a first driving hole (27) and a second driving hole (28) are arranged in the sliding rod (25), the first driving hole (27) is connected to the first sliding hole (18), and a first inclined spring (26) is arranged on the side of the first driving hole (27) close to the union female head (1) A second inclined surface corresponding to the first inclined surface is provided at one end of the extrusion rod (19) away from the third sealing groove (15); the end of the extrusion rod (19) slides along the first inclined surface through the second inclined surface; the second driving hole (28) is located inside the end of the sliding rod (25) away from the female union (1); the third inclined surface is provided on the side of the second driving hole (28) away from the female union (1); a sliding cavity (29) communicating with the second driving hole (28) is provided in the sealing retaining ring (9); a driving block (30) is slidably provided in the sliding cavity (29); a fourth inclined surface corresponding to the third inclined surface is provided on the side of the driving block (30) close to the sliding rod (25); A plurality of clamping plates (31) corresponding to the second sliding hole (24) are arranged on the side of the sealing retaining ring (9) away from the union disk (3), a sealing cavity (32) is arranged inside the clamping plate (31) along the length direction of the clamping plate (31), a plurality of sealing holes (33) are arranged at equal intervals on the side of the clamping plate (31) close to the union female head (1), one end of the sealing hole (33) is connected with the sealing cavity (32), an inner thread is arranged on the inner wall of the sealing hole (33), a mounting tube (34) is arranged inside the sealing hole (33), an outer thread is arranged on the outer wall of the mounting tube (34), the mounting tube (34) is connected to the sealing hole (33) by thread, and a piston plate (35) is slidably arranged inside the mounting tube (34). ), a clamping rod (36) is arranged at one end of the piston plate (35) away from the sealing chamber (32), a pressure block (37) is arranged at one end of the clamping rod (36) away from the piston plate (35), a piston rod (38) is arranged at one end of the driving block (30) away from the sliding rod (25), the piston rod (38) is extended into the sealing chamber (32) at one end away from the driving block (30) and a piston block (39) is arranged, the outer wall of the piston block (39) is slidably connected to the inner wall of the sealing chamber (32), a third spring (40) is sleeved on the outside of the piston rod (38), one end of the third spring (40) is connected to the piston block (39), and the other end of the third spring (40) is connected to the inner wall of the sealing chamber (32).

2. A high pressure union for oil mining according to claim 1, characterized in that: A limit baffle (7) is arranged on the inner wall of the clamping ring groove (4).

3. The high pressure union for oil mining according to claim 1, characterized in that: A plurality of protrusions (8) are arranged on the outer wall of the union disk (3), and the plurality of protrusions (8) are distributed in a ring array about the central axis of the union disk (3).

4. The high pressure union for oil mining according to claim 1, characterized in that: A fixing ring is arranged on the inner wall of one end of the union disc (3) away from the female union head (1), the fixing ring and the union disc (3) are designed to be integrally formed, a through hole is arranged at the center of the fixing ring, the outer wall of the male union head (2) is slidably connected with the inner wall of the through hole, a flange is arranged on one end of the male union head (2) close to the female union head (1), and the flange contacts the inner wall of the fixing ring on the side away from the female union head (1).

5. A high pressure union for oil mining according to claim 4, characterized in that: A first chamfer (10) is provided on the outer wall of the flange close to one end of the female union head (1), and a second chamfer (11) corresponding to the first chamfer (10) is provided on the inner wall of the female union head (1) close to one end of the male union head (2), and the second chamfer (11) is matched with the first chamfer (10).

6. A high pressure union for oil mining according to claim 5, characterized in that: A first sealing groove (12) is arranged in the first chamfer (10), a first sealing ring (13) is arranged in the first sealing groove (12), and a second sealing groove (14) corresponding to the first sealing groove (12) is arranged in the second chamfer (11).

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