Multi-stage sealing two-way oil pipe screw

Abstract

The utility model discloses a multi-stage sealing two-way oil pipe screw, and belongs to the technical field of oil pipe screws. The oil pipe screw comprises a screw rod, and the top of the screw rod is fixedly connected with a first external thread with a screw head arranged on the outer wall of the bottom end of the screw rod; the first oil way channel is vertically formed in the screw rod, and the first oil way channel penetrates through the bottom end of the screw rod; a raised second external thread is arranged on the outer wall between the bottom end of the screw rod and the screw head; and the first internal thread is arranged at the bottom end of the first oil path channel. According to the multi-stage sealing two-way oil pipe screw, when the screw rod is inserted into an oil inlet hole of an engine, the first external thread at the bottom end of the screw rod can be screwed with an internal thread at the oil inlet hole, and in the screwing process of the first external thread, the second external thread can be synchronously screwed with the internal thread of the oil inlet hole, so that the double-layer sealing effect is achieved; and when gap oil leakage occurs to the first external threads due to vibration, sealing can be performed through the second external threads, so that the sealing performance is improved, and the effect of multi-stage sealing is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil pipe screw technical field especially relates to multistage sealing double -way oil pipe screw. BACKGROUND

[0002] Oil pipe screw is the special screw of connecting oil pipe on engine, its structure mainly comprises the screw cap and screw rod, the screw rod is hollow structure, is equipped with the radial hole through the screw rod and with the inside center hole intercommunication on the outer wall of screw rod, has the thread on the outer wall of screw rod, when using, oil pipe bolt can also make oil from the radial hole and center hole of oil pipe bolt through while fixing oil pipe.

[0003] Such as the disclosure utility model with publication No. CN217682708U, this plum blossom oil pipe screw, including plum blossom screw, plum blossom screw includes: screw head and threaded rod, the bottom of screw head is connected with threaded rod, the top of screw head is equipped with plum blossom groove, the plum blossom groove is installed with elastic cover plate device, the elastic cover plate device includes: plum blossom cover plate and first spring, the bottom of plum blossom cover plate is elastically connected with the inside bottom end of plum blossom groove through a plurality of first springs, plum blossom cover plate and the inner wall of plum blossom groove are connected slidingly, the oil passage extending into the threaded rod is arranged on the screw head, the oil passage includes: oil pipeline, oil inlet hole and plunger, the oil pipeline extending into the threaded rod is set up on the screw head, the plunger is installed at the top of oil pipeline, a plurality of oil inlet holes communicating with oil pipeline are set up on the threaded rod, the lower half of threaded rod is equipped with installation groove, the installation groove is installed with the tensioning device extending to its outside, the rust resistance is good, and the disassembly is convenient, and the connection is stable, so the main function of oil pipe screw has been basically met, but still has the following shortcomings.

[0004] When connecting engine, oil pipe screw usually adopts the external thread of screw rod outer wall and the internal thread of engine to be combined to complete the connection, and then the oil required by engine will flow through the oil passage in the screw rod, so the sealing of oil pipe screw depends on the combination of screw rod external thread and engine internal thread, but oil has lubricating effect, and engine will vibrate when working, so it will cause the loosening of oil pipe screw, the sealing of oil pipe screw is poor, and oil will overflow, which needs regular maintenance. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a multistage sealing double -way oil pipe screw.

[0006] The utility model discloses a technical scheme is: a kind of multistage sealing double -way oil pipe screw, including screw rod, the top of screw rod is fixedly connected with screw head first external thread being arranged in the outer wall of screw rod bottom end;First oil passage channel is vertically arranged in the inside of screw rod, and this first oil passage channel penetrates the bottom end of screw rod;The outer wall between the bottom end of screw rod and the screw head is equipped with the second external thread of protrusion;First internal thread is arranged in the bottom end of first oil passage channel;Second internal thread is penetrated the top of screw head and is communicated with first oil passage channel, and the side wall of screw head is equipped with the second oil passage channel being communicated with second internal thread.

[0007] Further, the bottom end of the first internal thread is provided with a countersunk head at the connection with the bottom end of the screw rod.

[0008] Further, the diameter of the second external thread is greater than the diameter of the first external thread.

[0009] Further, the bottom of the screw head is horizontally arranged.

[0010] Further, the second internal thread penetrates the screw head and extends to the inside of the screw rod.

[0011] Further, the first oil passage channel is arranged along the axial direction of the screw rod.

[0012] Further, the screw rod and the screw head are made of chromium-molybdenum alloy stainless steel.

[0013] The utility model discloses the beneficial technical effects are: when screw rod is inserted into the oil inlet hole of engine, the first external thread of screw rod bottom end can be first with the internal thread of oil inlet hole place and is rotated, in the first external thread rotation process, second external thread also can be rotated with the internal thread of oil inlet hole simultaneously, thereby realizing the effect of double-layer sealing, when the first external thread appears the gap oil leakage due to vibration, then can be closed through second external thread, thereby improve the sealing, reach the effect of multistage sealing, when first internal thread and second internal thread are not closed by screw, can make the oil that enters second oil passage channel flow out through the bottom of screw rod and the top of screw head, reach the purpose of multichannel. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure perspective schematic diagram of the utility model;

[0015] Figure 2 It is the structure front view cross section schematic diagram of the utility model;

[0016] Figure 3 It is the structure perspective schematic diagram of the utility model;

[0017] Figure 4 It is the structure front view cross section schematic diagram of the utility model.

[0018] Corresponding component names represented by numbers and letters in the figure:

[0019] 1, screw rod; 2, screw head; 3, first external thread; 4, first oil passage; 5, second external thread; 6, first internal thread; 7, second internal thread; 8, second oil passage; 9, countersunk head. DETAILED DESCRIPTION

[0020] In order to more clearly understand the technical means of the utility model, and can be implemented according to the content of the specification, the specific embodiments of the utility model are further described in detail below, the following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0021] Referring to the accompanying Figures 1-4 As shown in the figure, the multistage sealing double-pass oil pipe screw of example one includes screw rod 1, the top of screw rod 1 is fixedly connected with screw head 2, first external thread 3 is arranged on the outer wall of the bottom end of screw rod 1, first oil passage 4 is vertically arranged in the inside of screw rod 1, and the first oil passage 4 penetrates the bottom end of screw rod 1, the outer wall between the bottom end of screw rod 1 and screw head 2 is provided with protruding second external thread 5, first internal thread 6 is arranged at the bottom end of first oil passage 4, second internal thread 7 penetrates the top of screw head 2 and is communicated with first oil passage 4, and the side wall of screw head 2 is provided with second oil passage 8 communicated with second internal thread 7.

[0022] When screw rod 1 is inserted into the oil inlet hole of the engine, then the first external thread 3 at the bottom end of screw rod 1 can be first screwed with the internal thread at the oil inlet hole, in the screwing process of first external thread 3, second external thread 5 will also be screwed with the internal thread of the oil inlet hole at the same time, so as to realize the double-layer sealing effect, when first external thread 3 appears a gap due to vibration and leaks oil, then second external thread 5 can be sealed, so as to improve the sealing performance and achieve the multistage sealing effect.

[0023] When screw rod 1 is fixed with the oil inlet hole through first external thread 3 and second external thread 5, the oil pipe can be connected with second oil passage 8, then oil can enter the inside of first oil passage 4 through second oil passage 8, and finally enter the oil inlet hole through the bottom.

[0024] The first internal thread 6 arranged can be screwed into a screw, so as to close the bottom of screw rod 1, so that oil can enter the inside of second internal thread 7 through second oil passage 8, and then flow out through second internal thread 7, so as to achieve the effect of changing the oil.

[0025] When first internal thread 6 and second internal thread 7 are not closed by a screw, the oil entering second oil passage 8 can flow out through the bottom of screw rod 1 and the top of screw head 2, so as to achieve the purpose of multiple passes.

[0026] Further, the bottom end of the first internal thread 6 is provided with a counterbore 9 at the joint with the bottom end of the screw rod 1.

[0027] When the screw is screwed with the first internal thread 6, the head of the screw can be hidden at the counterbore 9, so that the screw can be hidden, avoiding affecting the screw rod 1 into the oil inlet hole.

[0028] Further, the diameter of the second external thread 5 is larger than that of the first external thread 3.

[0029] Since the diameter of the second external thread 5 is larger than that of the first external thread 3, a buffer cavity is formed between the second external thread 5 and the first external thread 3 and the oil inlet hole.

[0030] Further, the bottom of the screw head 2 is horizontally arranged, and when the screw rod 1 is completely screwed into the oil inlet hole, the sealing ring can be placed on the bottom of the screw head 2, and the sealing ring is pressed flat by the plane, further improving the sealing performance.

[0031] Further, the second internal thread 7 extends through the screw head 2 to the inside of the screw rod 1.

[0032] When the second internal thread 7 is screwed inside, not only can the second internal thread 7 be blocked, but also the screw can close the second oil passage 8 when it is screwed to the deepest position, achieving the effect of controlling oil.

[0033] Further, the first oil passage 4 is arranged along the axial direction of the screw rod 1, and the axial arrangement can improve the strength of the screw and reduce the difficulty of production.

[0034] Further, the screw rod 1 and the screw head 2 are made of chromium-molybdenum alloy stainless steel, which has excellent high temperature and high pressure resistance, and has the characteristics of high strength and high hardness, so the service life is long.

[0035] The above only describes preferred embodiments of the present application, and is not used to limit the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should be considered as the protection range of the present application.

Claims

1. A multi-stage seal dual pass tubing screw, characterized by, Include: Screw rod (1), the top of the screw rod (1) is fixedly connected with screw head (2) The first outer thread (3) is arranged on the outer wall of the bottom end of the screw rod (1) The first oil passage (4) is vertically arranged in the interior of the screw rod (1), and the first oil passage (4) penetrates the bottom end of the screw rod (1) The second outer thread (5) is arranged on the outer wall between the bottom end of the screw rod (1) and the screw head (2) The first inner thread (6) is arranged on the bottom end of the first oil passage (4) The second inner thread (7) penetrates the top of the screw head (2) and communicates with the first oil passage (4), and the sidewall of the screw head (2) is provided with the second oil passage (8) which communicates with the second inner thread (7).

2. The multi-stage seal double- flow tubing screw of claim 1, wherein, The bottom end of the first inner thread (6) is provided with a countersunk head (9) at the connection with the bottom end of the screw rod (1).

3. The multi-stage seal double- flow tubing screw of claim 1, wherein, The diameter of the second outer thread (5) is greater than the diameter of the first outer thread (3).

4. The multi-stage seal double- flow tubing screw of claim 1, wherein, The bottom of the screw head (2) is horizontally arranged.

5. The multi-stage seal double- flow tubing screw of claim 1, wherein, The second inner thread (7) extends to the interior of the screw rod (1) through the screw head (2).

6. The multi-stage seal double- flow tubing screw of claim 1, wherein, The first oil passage (4) is arranged along the axial direction of the screw rod (1).

7. The multi-stage seal double- flow tubing screw of claim 1, wherein, The screw rod (1) and the screw head (2) are made of chromium-molybdenum alloy stainless steel.

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