CN104555065A - Protection ring for external thread at pipe end - Google Patents
Protection ring for external thread at pipe end Download PDFInfo
- Publication number
- CN104555065A CN104555065A CN201510016974.3A CN201510016974A CN104555065A CN 104555065 A CN104555065 A CN 104555065A CN 201510016974 A CN201510016974 A CN 201510016974A CN 104555065 A CN104555065 A CN 104555065A
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- protection ring
- metal case
- case body
- pipe end
- inner shell
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Abstract
The invention discloses a protection ring for an external thread at a pipe end. The protection ring includes an outer metal shell formed by stamping a metal plate and an inner plastic shell arranged in the outer metal shell and provided with an internal connection thread, wherein the inner plastic shell includes a fixed section fixed in the outer metal shell and a stretching section stretching out of the outer metal shell, the length of the stretching section is 1/6 to 2/3 of the length of the protection ring, and the length of the internal connection thread positioned in the outer metal shell is at least 1/4 of the effective thread length of the internal connection thread.- The protection ring for the external thread at the pipe end is simple in structure, convenient to manufacture, reduced in the consumption of the outer metal shell, lowered in cost, good in protection effect on the external thread at the end part, and elegant in appearance.
Description
Technical field
The present invention relates to tubing resist technology field, particularly a kind of pipe end outside thread protection ring.
Background technology
A lot of tubing as required, can process outside thread in its end, and then packing and transporting, and this time, in order to avoid in transportation, causes the externally threaded damage in end, needs to protect end outside thread.Patent publication No. CN 2434253Y, publication date are that the Chinese utility model patent of 2001-06-13 discloses a kind of external-thread protector; for petroleum casing pipe and the externally threaded protection of various pipe end; be made up of respectively injection moulding blank, steel bushing, seal cover cap; injection moulding blank and outer steel sleeve are pressed together fixing; female thread portion adopts lathe in machining to guarantee design accuracy; finally basin shape seal cover cap is headed into from bottom; be stuck in the dead slot that leaves at negative thread top; one is formed through assembling; there is anti-impact force strong, accuracy of thread advantages of higher.
But existing for the externally threaded protective device in end, cost compare is high, not ideal enough for the externally threaded protection effect in end.
Summary of the invention
The object of this invention is to provide a kind of pipe end outside thread protection ring, can overcome the deficiencies in the prior art part, its structure is simple, easy to make, with low cost, good, elegant in appearance for the externally threaded protection effect in end.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs: a kind of pipe end outside thread protection ring, comprise the metal case body be made up of stamped metal sheets and to be located in described metal case body and to be provided with the plastic inner shell body of interior connecting thread, described plastic inner shell body comprises the canned paragraph be fixed in described metal case body and the section of stretching out of stretching out described metal case body, the length of the described section of stretching out is the 1/6-2/3 of described protection ring length, the length that described interior connecting thread is positioned at described metal case body is at least 1/4 of described connecting thread useful thread.
Applicant finds after research repeatedly and experiment, the externally threaded protective device in existing end is nearly all made up of plastic inner shell body and steel shell, plastic inner shell body is arranged on steel shell inside, prevent shell from being wrapped up completely by plastic inner shell body, and plastic inner shell is provided with the internal thread hole be connected with end outside thread, in order to be connected internal thread hole all long with end outside thread, and steel shell is all by being welded after steel plate bending, in order to ensure enough structural strengths, steel plate is relatively thicker, cost is also just relatively higher, for this reason, applicant carried out and change targetedly, first the metal case body of welding is become into the seamless steel plate punched processing of monoblock, such processing mode, first the metal sheet relative thin of employing can be made a little, because the metal sheet after punching press can be finer and close, structural strength is relatively higher, secondly, reduce the length of metal case body, the materials of further minimizing metal sheet, the mode that before changing, metal case body all wraps up plastic inner shell body, and become portion envelops, the part of plastic inner shell body is made to expose metal case body (section of stretching out), simultaneously, applicant finds, when being connected with end outside thread and withstanding shocks (axis and inclined impact etc.), not all negative thread all works, only that part negative thread plays a role, for this reason, applicant ensures that the negative thread worked when being connected with end outside thread is positioned at metal case body, the impulsive force that whole protection ring bears is ensured with this, end outside thread is effectively protected, like this, applicant passes through punch machining process, reduce metal case body length, partly plastic inner housing stretches out connecting thread in metal case body and part and is positioned at metal case body, not only reduce the materials (thickness of metal sheet and area used) of metal case body, also assures that the protection ring made can bear enough impulsive forces, very effective protection is formed to end outside thread, and the protectiveness made is also very attractive in appearance, generous.
As preferably, described metal case body comprises outer cylinder body, caves in described plastic inner shell body direction in described outer cylinder body end, is formed and the ring-shaped edge lug boss of described plastic inner shell body end contact and the depressed part being positioned at described ring-shaped edge lug boss.
The setting of depressed part and ring-shaped edge projection, improves the structural strength of metal case end of body, also improves metal case body to the support degree of plastic inner shell body, making when being impacted, effectively protecting end outside thread.
As preferably, in described plastic inner shell body, be provided with the support portion contacted with the depression bottom surface of described depressed part.
Support portion is the back-up block of support ring or uniform setting, and back-up block is circular arc or rectangle or trapezoidal or triangle etc., contacts, improve metal case body further to the support of plastic inner shell body with the depression bottom surface of depressed part.
As preferably, described metal case body also comprises at least two lug bosses be arranged on described depressed part.
The quantity of lug boss; can set according to actual conditions; 2,3,4,5,6 can; the setting of lug boss; not only increasing the structural strength of metal case end of body, make metal case body can have higher structural strength with thinner thickness, meeting the needs to the protection of end outside thread when being impacted; but also can when needs, and external tool coordinates the dismounting that realizes protection ring and tightens.
As preferably, on the depression bottom surface that described lug boss is located at described depressed part and and the side of described depressed part have gap; Or the depression bottom surface being located at described depressed part is connected with the side of described depressed part.
As preferably, the side that described lug boss is adjacent with described plastic inner shell body is provided with recessed cavity, and described plastic inner shell body is provided with the contiguous block stretched in described recessed cavity.
The cooperation of contiguous block and recessed cavity; can prevent that metal case body is relative with plastic inner shell body mode to be rotated; with impact to the externally threaded protected effect in end; because after long transport and external impacts; metal case body and plastic inner shell body may find small relative rotation; and such consequence is disadvantageous to protection end outside thread, the cooperation of contiguous block and recessed cavity, well solves this difficult problem.
As preferably, described depressed part is provided with at least two drawing cavitys near the side of described support portion, and described drawing cavity extends internally and part stretches out described support portion.
The setting of drawing cavity, is conducive to the recovery of used protection ring, and instrument can be utilized to stretch in drawing cavity, and support portion coordinates, and realizes being separated of metal case body and plastic inner shell body, realizes recycling, energy-conserving and environment-protective.
As preferably, the depression bottom surface of described depressed part is provided with at least two through holes.
The setting of two through holes; first can deaeration fast when installing protection ring, be conducive to protection ring quick, correctly install, can also in protection ring recycling; coordinate with drawing cavity, realize being separated of metal case body and plastic inner shell body.
As preferably, the length that described interior connecting thread is positioned at described metal case body is the 1/3-2/3 of described connecting thread useful thread; The length of the described section of stretching out is the 1/3-1/2 of described protection ring length.
As preferably, described plastic inner shell body is provided with away from the end of described metal case body the pilot hole communicated with described interior connecting thread.
The diameter of pilot hole is greater than the external diameter of interior connecting thread; it first can when installation; play the effect of guiding; realize the externally threaded location of protection ring and end, and then be connected with end outside thread by interior connecting thread, secondly; which reduce the length of interior connecting thread; reduce difficulty time interior connecting thread is connected with end outside thread, reduce the time that connection spends, achieve Fast Installation and the dismounting of protection ring.
In sum, the present invention has following beneficial effect:
Its structure is simple, easy to make, reduces the consumption of metal case body, reduces cost, good, elegant in appearance for the externally threaded protection effect in end.
Accompanying drawing explanation
Fig. 1 is the structural representation of one embodiment of the invention;
Fig. 2 is the schematic perspective view of Fig. 1;
Fig. 3 is the A-A cutaway view in Fig. 1;
Fig. 4 is the B-B cutaway view in Fig. 1;
Fig. 5 is drawing cavity structure schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
This specific embodiment is only explanation of the invention; it is not limitation of the present invention; those skilled in the art can make to the present embodiment the amendment not having creative contribution as required after reading this specification sheets, as long as but be all subject to the protection of patent law in right of the present invention.
Embodiment: as Fig. 1, 2, 3, 4, shown in 5, a kind of pipe end outside thread protection ring, comprise the metal case body 1 be made up of the punching press of seamless metal plate and to be located in described metal case body 1 and to be provided with the plastic inner shell body 2 of interior connecting thread 3, metal case body 1 (is generally carbon steel sheet by monoblock seamless metal sheet material, seamless declaration of will steel plate is not that welding is combined into one piece) punch forming, make the metal case body made can realize higher structural strength with thinner thickness, after punching press, remaining useless remaining metal sheet reclaims, to reduce costs, plastic inner shell body 2 is fixed in metal case body, and be provided with interior connecting thread, be used for being connected with the end outside thread of tubing, described plastic inner shell body 2 comprises the canned paragraph 201 be fixed in described metal case body 1 and the section of stretching out 202 of stretching out described metal case body 1, fixed end and the section of stretching out integrated injection molding, canned paragraph is used for being connected with metal case body, realize and metal case body fix, the section of stretching out is positioned at the outside of metal case body, the length of the described section of stretching out is the 1/6-2/3 of described protection ring length, wherein, be good with 1/3-2/3, the length that described interior connecting thread is positioned at described metal case body is at least 1/4 of described connecting thread useful thread, wherein, be good with 1/3-1/2, simultaneously, described plastic inner shell body 2 is provided with away from the end of described metal case body 1 pilot hole 5 communicated with described interior connecting thread 3, preferably, pilot hole 5 is taper hole, its diameter along with becoming large gradually away from described interior connecting thread, the existence of pilot hole, the effect of guiding not only can be played when being connected with end outside thread, also reduce the length of interior connecting thread, decrease the time of installing/dismounting and the difficulty of processing, improve work efficiency.
Described metal case body 1 comprises outer cylinder body 101, outer cylinder body is cylindrical or near cylindrical, caving in described plastic inner shell body 2 direction in described outer cylinder body end, is formed and the ring-shaped edge lug boss 102 of described plastic inner shell body 2 end contact and the depressed part 103 being positioned at described ring-shaped edge lug boss 102, depressed part is connected with ring-shaped edge lug boss 102, middle can be provided with centre hole, form ring-type, also can not centre hole be set, select according to the actual requirements, the side that ring-shaped edge lug boss 102 contacts with plastic inner shell body 2 forms toroidal cavity, plastic inner shell body 2 is provided with the annular support body be filled in in ring cavity, simultaneously, the support portion 6 contacted with the depression bottom surface of described depressed part 5 is provided with in described plastic inner shell body 2, support portion 6 is support ring, or, the back-up block of uniform setting, the shape of back-up block is all the other shapes such as circular arc or rectangle or trapezoidal or triangle, depressed part 5 is supported.
Described metal case body 1 also comprises at least two lug bosses 104 be arranged on described depressed part 103; On the depression bottom surface that described lug boss 104 is located at described depressed part 103 and and the side of described depressed part 103 have gap; Or; The depression bottom surface being located at described depressed part 103 is connected with the side of described depressed part 103; Wherein, be connected with the depression bottom surface of depressed part 103 and the side of described depressed part 103 for good with lug boss 104, quantity controls according to the actual requirements simultaneously, and being generally 2-4 for good, in the present embodiment, is 2; The side that lug boss 104 is adjacent with described plastic inner shell body 2 is provided with recessed cavity 105, described plastic inner shell body 2 is provided with the contiguous block 7 stretched in described recessed cavity 105, lug boss 104 not only can increase the structural strength of metal case end of body, can also coordinate together with contiguous block, prevent from rotating between metal case body and plastic inner shell body, impact is to the externally threaded protection in end, and the shape of contiguous block is corresponding with the shape of recessed cavity.
Described depressed part 103 is provided with at least two drawing cavitys 9 near the side of described support portion 6, described drawing cavity 9 extends internally and part stretches out described support portion 6, drawing cavity 9 can be arranged separately, also can be communicated with recessed cavity 105, in the structure that accompanying drawing 5 shows, it is exactly the structure that drawing cavity and recessed cavity 105 are connected together, the depression bottom surface of described depressed part 103 is provided with at least two through holes 8, through hole 8 and drawing cavity interval are arranged, in cruciform shape, depression bottom surface is provided with label mounting hole 4, for installing label.
Claims (10)
1. a pipe end outside thread protection ring, is characterized in that: comprise by
seamless the metal case body (1) that stamped metal sheets is made and to be located in described metal case body (1) and to be provided with the plastic inner shell body (2) of interior connecting thread (3), described plastic inner shell body (2) comprises the canned paragraph (201) be fixed in described metal case body (1) and the section of stretching out (202) of stretching out described metal case body (1), the length of the described section of stretching out (202) is the 1/6-2/3 of described protection ring length, the length that described interior connecting thread (3) is positioned at described metal case body (1) is at least 1/4 of described connecting thread (3) useful thread.
2. a kind of pipe end outside thread protection ring according to claim 1; it is characterized in that: described metal case body (1) comprises outer cylinder body (101); caving in described plastic inner shell body (2) direction in described outer cylinder body end, is formed and the ring-shaped edge lug boss (102) of described plastic inner shell body (2) end contact and the depressed part (103) being positioned at described ring-shaped edge lug boss (102).
3. a kind of pipe end outside thread protection ring according to claim 2, is characterized in that: be provided with the support portion (6) contacted with the depression bottom surface of described depressed part (5) in described plastic inner shell body (2).
4. a kind of pipe end outside thread protection ring according to Claims 2 or 3, is characterized in that: described metal case body (1) also comprises at least two lug bosses (104) be arranged on described depressed part (103).
5. a kind of pipe end outside thread protection ring according to claim 4, is characterized in that: on the depression bottom surface that described lug boss (104) is located at described depressed part (103) and and the side of described depressed part (103) have gap; Or the depression bottom surface being located at described depressed part (103) is connected with the side of described depressed part (103).
6. a kind of pipe end outside thread protection ring according to claim 4; it is characterized in that: the side that described lug boss (104) is adjacent with described plastic inner shell body (2) is provided with recessed cavity (105), described plastic inner shell body (2) is provided with the contiguous block (7) stretched in described recessed cavity (105).
7. a kind of pipe end outside thread protection ring according to Claims 2 or 3; it is characterized in that: described depressed part (103) is provided with at least two drawing cavitys (9) near the side of described support portion (6), described drawing cavity (9) extends internally and part stretches out described support portion (6).
8. a kind of pipe end outside thread protection ring according to claim 1 or 2 or 3, is characterized in that: the depression bottom surface of described depressed part is provided with at least two through holes (8).
9. a kind of pipe end outside thread protection ring according to claim 1 or 2 or 3, is characterized in that: the length that described interior connecting thread (3) is positioned at described metal case body (1) is the 1/3-2/3 of described connecting thread (3) useful thread; The length of the described section of stretching out (202) is the 1/3-1/2 of described protection ring length.
10. a kind of pipe end outside thread protection ring according to claim 1 or 2 or 3, is characterized in that: described plastic inner shell body (2) is provided with away from the end of described metal case body (1) pilot hole (5) communicated with described interior connecting thread (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510016974.3A CN104555065B (en) | 2015-01-14 | 2015-01-14 | A kind of pipe end external screw thread protection ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510016974.3A CN104555065B (en) | 2015-01-14 | 2015-01-14 | A kind of pipe end external screw thread protection ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104555065A true CN104555065A (en) | 2015-04-29 |
| CN104555065B CN104555065B (en) | 2017-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510016974.3A Active CN104555065B (en) | 2015-01-14 | 2015-01-14 | A kind of pipe end external screw thread protection ring |
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| Country | Link |
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| CN (1) | CN104555065B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105600131A (en) * | 2015-10-30 | 2016-05-25 | 山东科技大学 | Recoverable inclinometer pipe orifice protecting sleeve |
| WO2018039874A1 (en) * | 2016-08-29 | 2018-03-08 | 浙江天衣机械有限公司 | Device for protecting thread of petroleum pipe |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4487228A (en) * | 1983-12-19 | 1984-12-11 | Shell Oil Company | Weather-resistant and self-draining thread protector |
| CN2536521Y (en) * | 2002-03-20 | 2003-02-19 | 天津钢管机电设备修造中心 | Tubular threading protectors |
| CN201745901U (en) * | 2010-08-06 | 2011-02-16 | 天津丰亿达通用机械有限公司 | External threaded protector |
| CN102275683A (en) * | 2011-08-11 | 2011-12-14 | 成都科盛石油科技有限公司 | Easily-dismantled external-thread petroleum machinery workpiece protective cover |
| CN202481515U (en) * | 2012-01-11 | 2012-10-10 | 宝鸡市金城机器制造有限责任公司 | Novel oil well steel pipe end coupling internal thread protection device |
| CN202481516U (en) * | 2011-12-30 | 2012-10-10 | 宝鸡市金城机器制造有限责任公司 | Novel protection device for external threads at end of steel tube of petroleum well |
| WO2014053103A1 (en) * | 2012-12-19 | 2014-04-10 | 无锡市红叶塑钢制品有限公司 | Large-diameter thread protector |
| CN204433358U (en) * | 2015-01-14 | 2015-07-01 | 浙江天衣机械有限公司 | A kind of pipe end outside thread protection ring |
-
2015
- 2015-01-14 CN CN201510016974.3A patent/CN104555065B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4487228A (en) * | 1983-12-19 | 1984-12-11 | Shell Oil Company | Weather-resistant and self-draining thread protector |
| CN2536521Y (en) * | 2002-03-20 | 2003-02-19 | 天津钢管机电设备修造中心 | Tubular threading protectors |
| CN201745901U (en) * | 2010-08-06 | 2011-02-16 | 天津丰亿达通用机械有限公司 | External threaded protector |
| CN102275683A (en) * | 2011-08-11 | 2011-12-14 | 成都科盛石油科技有限公司 | Easily-dismantled external-thread petroleum machinery workpiece protective cover |
| CN202481516U (en) * | 2011-12-30 | 2012-10-10 | 宝鸡市金城机器制造有限责任公司 | Novel protection device for external threads at end of steel tube of petroleum well |
| CN202481515U (en) * | 2012-01-11 | 2012-10-10 | 宝鸡市金城机器制造有限责任公司 | Novel oil well steel pipe end coupling internal thread protection device |
| WO2014053103A1 (en) * | 2012-12-19 | 2014-04-10 | 无锡市红叶塑钢制品有限公司 | Large-diameter thread protector |
| CN204433358U (en) * | 2015-01-14 | 2015-07-01 | 浙江天衣机械有限公司 | A kind of pipe end outside thread protection ring |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105600131A (en) * | 2015-10-30 | 2016-05-25 | 山东科技大学 | Recoverable inclinometer pipe orifice protecting sleeve |
| WO2018039874A1 (en) * | 2016-08-29 | 2018-03-08 | 浙江天衣机械有限公司 | Device for protecting thread of petroleum pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104555065B (en) | 2017-06-16 |
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