CN210196695U - Internal thread pipeline sealing head - Google Patents

Abstract

The utility model relates to a pipe joint field, in particular to pipeline sealing head. The method comprises the following steps: the body, the inner joint and the outer joint; inner joint: the inner joint is of a rigid tubular structure, and external threads are arranged on the circumference of the inner joint and can be matched with the internal threads of the pipeline; the inner joint is fixedly arranged on the body; an external joint: the outer joint is of an elastic annular structure and is fixedly arranged on the inner joint; a driving mechanism: the driving mechanism can enable the outer joint to be in an expanded state and a contracted state. Compared with the prior art, the joint is arranged into an inner joint and an outer joint, the inner joint is made of rigid material and is provided with external threads matched with the internal thread pipeline; the outer joint is annular elastic material, and outer joint and pipeline inner wall in close contact with when propping the head and propping big outer joint, the inner joint is direct to contact with the smooth position that the pipeline does not have the screw thread, has avoided the problem of revealing that the screw gap caused.

Description

Internal thread pipeline sealing head

Technical Field

The utility model relates to a pipe joint field, in particular to pipeline sealing head.

Background

The quick connector is a connector which can realize the connection or disconnection of pipelines without workpieces. At present, tools such as a wrench are basically utilized to perform hand-screwing connection when the quick connector is connected with an internal thread pipeline, generally, sealing glue needs to be arranged on a thread part, and the connection process is complex. Many times, the internally threaded pipe only needs to be temporarily sealed, and after the seal is released, the internally threaded pipe can be connected with other pipes or valves. The manual connection mode is time-consuming and labor-consuming, and the sealing tape or the sealing glue is troublesome to remove. There is a need for a quick connector that can make a quick connect seal with internally threaded pipes.

A quick connector is disclosed in the chinese utility model patent with publication number CN 207406957U; according to the method, an elastic joint extends out of a body, the elastic joint is inserted into an internal threaded pipe, and a driving mechanism is used for driving a conical expanding head to move towards the elastic joint, so that the radius of the elastic joint is expanded, and a pipeline opening is blocked. But in practice leakage problems occur when the pressure in the pipe is high. And the handle structure is difficult to operate when the handle structure is used in a position with a narrow operation space.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to an internal thread pipeline sealing head, which can be firmly installed in the internal thread pipeline to seal the pipeline; meanwhile, the whole device can be used in a narrow space without influencing the operation.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this: an internally threaded pipe seal head, comprising:

the connector comprises a body, wherein one end of the body is provided with a connector, and a driving mechanism is arranged in the body;

a joint disposed at one end of the body, the joint including an inner joint and an outer joint;

the pipe fitting comprises a nipple, a pipe fitting body and a pipe, wherein the nipple is of a rigid tubular structure, and is provided with external threads in the circumferential direction and can be matched with the internal threads of a pipeline; the inner joint is fixedly arranged on the body;

the outer joint is of an elastic annular structure and is fixedly arranged on the inner joint;

the driving mechanism can enable the external joint to be in an expanded state and a contracted state;

the driving mechanism comprises a communicating vessel, a first piston rod and a second piston rod, the communicating vessel comprises two mutually communicated cylinder bodies, namely a first cylinder body and a second cylinder body, the first piston rod is installed in the first cylinder body, and the second piston rod is installed in the second cylinder body;

the one end that the second piston rod kept away from the second cylinder body is connected with conical opening head, thereby the second piston rod can drive opening head to be located the position of external joint and prop greatly the external joint with the state of opening of pipeline inner wall laminating, and the shrink state that opening head is located the external of external joint.

The first piston rod is at least partially outside the body to enable a person to drive the first piston rod.

Preferably, the internal thread pipeline sealing head further comprises a spring, one end of the spring is fixed on the body, and the other end of the spring is connected with the second piston rod; the spring can pull the supporting head towards the center of the outer joint.

Preferably, the diameter of the outer joint is smaller than the small diameter of the outer thread of the inner joint.

Preferably, the outer joint is provided with an annular protrusion at the periphery thereof, and the central axis of the protrusion coincides with the central axis of the outer joint.

Preferably, the nipple has an axial length greater than the depth of the internal thread of the pipe.

Preferably, the first piston rod is connected with the body through a ratchet mechanism, and the ratchet mechanism enables the first piston rod to move the spreader head out of the outer joint through the communicating vessel, and prevents the first piston rod from moving reversely.

Preferably, the ratchet mechanism comprises a long-strip ratchet bar with ratchet teeth and a pawl, the ratchet bar is fixedly arranged on the body, and the pawl is arranged on the first piston rod.

Preferably, the ratchet mechanism further comprises a shifting piece for controlling the pawl, the shifting piece is rotatably mounted on the first piston rod, and one end of the shifting piece is fixedly connected with the other end of the pawl to form a structure capable of enabling a hand to rotate the reversing shifting piece.

Preferably, the ratchet mechanism further comprises an elastic sheet, the elastic sheet is connected with the first piston rod and the pawl, and the elastic sheet can pull the pawl to the ratchet bar.

In the prior art, a plurality of joints consisting of elastic thread clamping pieces are inserted into a pipeline, and then a spreading head is inserted into the joints. And the long handle is difficult to operate in a narrow space, so that the use of the device is limited.

Compared with the prior art, the utility model has the advantages that the joint is arranged into an inner joint and an outer joint, the inner joint is made of rigid material and is processed with external threads matched with an internal thread pipeline, when in use, the threads of the inner joint are screwed on the bottom of the pipeline, and the joint and the whole device are firmly connected to the pipeline through thread matching; the end-to-end connection at the inner joint has the outer joint, the outer joint is annular elastic material, and the center is provided with the joint of strutting simultaneously, and outer joint and pipeline inner wall in close contact with when strutting the joint and strutting the big outer joint, because the screw thread of outer joint directly twists pipeline internal thread bottom, the inner joint directly does not have the smooth position contact of screw thread with the pipeline, has avoided the problem of revealing that the thread gap caused.

In a driving mode, the utility model discloses hydraulic drive has been used, through two cylinder body interconnect constitution intercommunicating vessels, drive the motion of first piston rod in first cylinder body just can drive the motion of second piston rod in the second cylinder body, thereby it drives the shrink of propping the head control outer joint and struts to recycle the second piston rod. Therefore, the state of the joint can be controlled only by one linear motion, the rotation of the handle is not needed, and the rotation of the handle can be realized only by needing a large space. The two cylinder bodies are connected with each other, and the transmission ratio of the first piston rod and the second piston rod can be controlled by adjusting the diameters of the two cylinder bodies. The axis directions of the two cylinder bodies can be adjusted by arranging the two cylinder bodies, so that the driving direction can be conveniently adjusted.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is an enlarged view of A in FIG. 1;

FIG. 3 is a schematic view of the present invention installed in a pipeline;

fig. 4 is an enlarged view of B in fig. 3.

Description of reference numerals:

1-body 2-inner joint

3-external joint 4-opening joint

5-pipe 6-spring

7-transmission rod 8-first cylinder

9-second cylinder 10-first piston

11-second piston 12-ratchet

13-pawl 14-plectrum

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

In the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, left, and right" generally means upper, lower, left, and right as illustrated with reference to fig. 1; "inner and outer" refer to the inner and outer relative to the profile of the components themselves. The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.

The utility model provides an internal thread pipeline sealing head, as shown in fig. 1 to fig. 4, internal thread pipeline sealing head includes:

the device comprises a body 1, wherein a joint is arranged at one end of the body 1, and a driving mechanism is arranged in the body 1;

the joint is arranged at one end of the body 1 and comprises an inner joint 2 and an outer joint 3;

nipple 2 said nipple 2 is a rigid tubular structure, said nipple 2 being provided with an external thread in the circumferential direction capable of cooperating with an internal thread of the pipe 5; the nipple 2 is fixedly mounted on the body 1;

the outer joint 3 is an elastic annular structure, and the outer joint 3 is fixedly arranged on the inner joint 2;

the driving mechanism can make the outer joint 3 in an expanded state and a contracted state;

the driving mechanism comprises a communicating vessel, a first piston 10 rod and a second piston 11 rod, the communicating vessel comprises two mutually communicated cylinder bodies, namely a first cylinder body 8 and a second cylinder body 9, the first piston 10 rod is installed in the first cylinder body 8, and the second piston 11 rod is installed in the second cylinder body 9;

one end, far away from the second cylinder body 9, of the second piston 11 rod is connected with a conical expansion joint 4, the second piston 11 rod can drive the expansion joint 4 to be located in the outer joint 3, so that the expansion state of the outer joint 3 attached to the inner wall of the pipeline 5 is expanded, and the contraction state of the expansion joint 4 located outside the outer joint 3 is expanded.

The positioning of at least a portion of the first piston 10 rod outside the body 1 enables one to drive the first piston 10 rod.

In order to avoid the problem of leakage of the fluid, typically gas or liquid, from the thread gap under pressure, in the embodiment shown in fig. 1, in the pipe 5, the present invention is primarily directed to the design of the joint, which has two main parts, an inner joint 2 and an outer joint 3; the inner joint 2 is a tubular structure fixedly mounted on the body 1, preferably, as shown in fig. 1, one end of the body 1 is provided with a mounting hole, one end of the inner joint 2 can be matched with the mounting hole and inserted into the mounting hole, and then the inner joint 2 and the body 1 are fixed with each other through a fastening screw; the other end of the inner joint 2 is provided with an external thread which can be matched with the internal thread of the pipeline 5 and can be arranged at the bottom of the internal thread of the pipeline 5, and two embodiments are provided for realizing the above effects, wherein one embodiment is that as shown in figures 1 and 2, a neck part with a certain length L is arranged between one end of the inner joint 2 with the external thread and one end of the insertion body 1, the radius of the neck part is smaller than that of the minor diameter of the external thread, the axial length of the external thread is L, and the length of L + L is larger than the depth of the internal thread of the pipeline 5. The second solution consists in directly providing an external thread having an axial length greater than the depth of the internal thread of the pipe 5.

An outer joint 3 is fixedly connected to one end, far away from the body 1, of the inner joint 2, the outer joint 3 is of a hollow annular structure, and the outer joint 3 is made of elastic materials and preferably made of rubber materials; the axis coincidence of outer joint 3 and nipple 2, the external diameter size of outer joint 3 is less than the path of external screw thread on nipple 2 simultaneously, and the external diameter of outer joint 3 is less than the internal diameter of female screw pipeline 5 promptly for outer joint 3 can be unhindered insert in the pipeline 5.

Meanwhile, in order to seal the pipeline 5, the utility model also has a driving mechanism and a spreading joint 4, the spreading joint 4 can move into the central hole of the annular outer joint 3, because the outer joint 3 is made of elastic material, the spreading joint 4 can spread the outer joint 3, so that the maximum outer diameter of the outer joint 3 is larger than the inner diameter of the pipeline 5, or when the outer joint 3 is positioned in the pipeline 5, the outer joint 3 is clung to the pipeline 5; meanwhile, the opening head 4 can tightly block the inner hole of the outer joint 3, so that the effect of sealing the pipeline 5 is achieved.

When the pipeline expansion joint is in work, the expansion joint 4 is located outside an inner hole of the outer joint 3, the inner joint 2 is assembled in the pipeline 5, the thread of the inner joint 2 rotates to the bottom of the thread of the pipeline 5, the outer joint 3 is located on the smooth pipe wall part without the thread of the pipeline 5, then the expansion joint 4 moves into the external thread pipeline 5, the outer diameter of the outer joint 3 is expanded by the expansion joint 4, so that the outer joint 3 is tightly attached to the inner wall of the pipeline 5, meanwhile, the central hole of the outer joint 3 is blocked by the expansion joint 4, the whole pipeline 5 is sealed, the inner joint 2 made of rigid materials is connected with the pipeline 5 through the thread, and the pipeline expansion joint is firm in connection and not easy.

The driving mechanism comprises a first cylinder 8 and a second cylinder 9 which are communicated with each other through a pipeline 5 to form a communicating device, and further comprises a first piston 10 rod and a second piston 11 rod, wherein the first piston 10 rod is installed in the first cylinder 8, and the second piston 11 rod is installed in the second cylinder 9. The matching between the piston rod and the cylinder body is the same as that of a common hydraulic cylinder, the piston rod can slide in the cylinder body, and meanwhile, one end of the piston rod is provided with a piston head which can prevent liquid in the cylinder body from flowing out. One end of the rod of the second piston 11, which is far away from the second cylinder 9, is connected with a conical expansion head 4. The second piston 11 rod is preferably connected to the spreader head 4 by a transmission rod 7 as shown in fig. 1. The second piston 11 rod can drive the opening head 4 to a position in the outer joint 3 so as to expand an opening state of the outer joint 3 attached to the inner wall of the pipeline 5 and a contraction state of the opening head 4 positioned outside the outer joint 3. The positioning of at least a portion of the first piston 10 rod outside the body 1 enables one to drive the first piston 10 rod. Preferably, as shown in fig. 4, a handle structure is rotatably mounted on the first piston 10, the handle is positioned outside the body 1 and can be grasped by a human hand, and meanwhile, the handle can be folded to be coaxial with the joint to reduce the volume; at the same time, the body 1 is provided with a relative movement groove, so that the first piston 10 rod and the handle can move on the body 1.

Through setting up two cylinder bodies that communicate each other, install the piston rod on the cylinder body, alright through another piston rod of a piston rod drive, the utility model discloses well 11 poles of second piston are connected with and prop first 4, through the first movable rod of handle drive. Compared with the prior art, the space required when the support head 4 is driven can be effectively reduced through a hydraulic transmission mode.

According to the utility model discloses an internal thread pipeline sealing head is still including spring 6, 6 one end of spring is linked the other end on body 1 and is connected transfer line 7, and here we consider transfer line 7 to be the partly of second piston 11 pole, as shown in fig. 1, spring 6 can drive transfer line 7 when not receiving external force and will prop head 4 and bring into in outer joint 3.

When the hydraulic prop is used, a person applies right acting force to the first hydraulic cylinder, the prop-open head 4 is separated from the outer joint 3, then the joint is connected with the pipeline 5, the acting force of the handle is removed, and the prop-open head 4 returns to the outer joint 3 again under the action of the spring 6.

Preferably, the diameter of the outer joint 3 is smaller than the small diameter of the outer thread of the inner joint 2.

Preferably, the outer circumference of the outer joint 3 is provided with an annular protrusion, and the central axis of the protrusion coincides with the central axis of the outer joint 3.

Preferably, the axial length of nipple 2 is greater than the depth of the internal thread of pipe 5.

During the coupling of the coupling to the pipe 5, the threads of the nipple 2 and of the pipe 5 have to be mutually engaged, the whole device being rotated during the whole process, without interrupting the action of the person on the rod of the first piston 10, with a consequent inconvenience in the operating process. Therefore the utility model discloses still at first piston 10 pole with connect through ratchet 8 between the body 1, ratchet can make first piston 10 pole can be free will prop the head 4 and remove the outer joint 3 prevents simultaneously handle reverse motion. The ratchet mechanism comprises a strip-shaped ratchet rack 12 with ratchet teeth and a pawl 13, the ratchet rack 12 is fixedly arranged on the body 1, and the pawl 13 is arranged on the first piston 10 rod. Since the movement of the first piston 10 rod is a linear movement, the ratchet wheel of the common ratchet mechanism is deformed into a strip-shaped ratchet bar 12, and the ratchet bar 12 is provided with the ratchet teeth on the normal ratchet wheel; this can be considered to be a part of the ratchet where the radius approaches infinity.

In order to control the ratchet mechanism, the ratchet mechanism further comprises a shifting piece 14 for controlling a pawl 13, the shifting piece 14 is rotatably arranged on the rod of the first piston 10, one end of the shifting piece 14 is fixedly connected with the pawl 13, and the other end of the shifting piece 14 forms a structure capable of enabling a hand to rotate the reversing shifting piece 14.

Meanwhile, in order to prevent the pawl 13 from being naturally separated from the ratchet bar 12, the ratchet mechanism further comprises an elastic sheet which is provided with elasticity and is connected with the first piston 10 rod and the pawl 13, and the elastic sheet can pull the pawl 13 to the ratchet bar 12.

The utility model discloses a working method: firstly, a handle is manually driven to move rightwards, a first piston 10 rod moves rightwards, liquid in a communicating vessel flows from a first cylinder 8 to a second cylinder 9 to push a second piston 11 rod to move rightwards, a push transmission rod 7 of the second piston 11 rod overcomes the elastic force of a spring 6 to push a spreading joint 4 out of an outer joint 3, and the outer joint 3 is in a contracted state; then aim at the pipe-line 5 with the joint and rotate whole device, with the screw thread of inner joint 2 and the screw thread cooperation of pipe-line 5 and rotate the bottom that the pipe-line 5 got the screw thread, stir plectrum 14 at last and make pawl 13 break away from ratchet 12, under the effect of spring 6, prop and prop joint 4 and return to outer joint 3, prop big outer joint 3 and make outer joint 3 and smooth pipe-line 5 inner wall in close contact with, prop the centre bore that head 4 can block up outer joint 3 simultaneously.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. An internally threaded pipe seal head, comprising:

the device comprises a body (1), wherein one end of the body (1) is provided with a joint, and a driving mechanism is arranged in the body (1);

a joint provided at one end of the body (1), the joint comprising an inner joint (2) and an outer joint (3);

the pipe fitting comprises a nipple (2), wherein the nipple (2) is of a rigid tubular structure, and external threads are arranged on the circumference of the nipple (2) and can be matched with internal threads of a pipeline (5); the inner joint (2) is fixedly arranged on the body (1);

the outer joint (3) is of an elastic annular structure, and the outer joint (3) is fixedly arranged on the inner joint (2);

the driving mechanism can enable the outer joint (3) to be in an expanded state and a contracted state;

the driving mechanism comprises a communicating vessel, a first piston (10) rod and a second piston (11) rod, the communicating vessel comprises two cylinders which are communicated with each other, a first cylinder (8) and a second cylinder (9), the first piston (10) rod is installed in the first cylinder (8), and the second piston (11) rod is installed in the second cylinder (9);

one end of the rod of the second piston (11), which is far away from the second cylinder body (9), is connected with a conical spreading joint (4), the rod of the second piston (11) can drive the spreading joint (4) to be positioned in the outer joint (3) so as to spread the spreading state of the outer joint (3) which is attached to the inner wall of the pipeline (5) and the contraction state of the spreading joint (4) which is positioned outside the outer joint (3),

the first piston (10) rod being at least partially external to the body (1) to enable a person to drive the first piston (10) rod.

2. The internally threaded pipe sealing head according to claim 1, further comprising a spring (6), wherein one end of the spring (6) is fixed to the body (1) and the other end is connected to the second piston (11) rod; the spring (6) can pull the spreading joint (4) towards the center of the outer joint (3).

3. The internally threaded pipe seal according to claim 1, characterized in that the diameter of the outer joint (3) is smaller than the minor diameter of the external thread of the inner joint (2).

4. The internally threaded pipe seal according to claim 1, characterized in that the outer circumference of the outer joint (3) is provided with an annular projection, the central axis of which coincides with the central axis of the outer joint (3).

5. The internally threaded pipe sealing head according to claim 1, characterized in that the axial length of the nipple (2) is greater than the depth of the internal thread of the pipe (5).

6. The internally threaded pipe seal according to any one of claims 1 to 5, characterized in that the connection between the first piston (10) rod and the body (1) is by means of a ratchet mechanism which enables the first piston (10) rod to move the spreader head (4) out of the outer joint (3) through a communication connection while preventing the first piston (10) rod from moving in the opposite direction.

7. The internally threaded pipe sealing head according to claim 6, wherein said ratchet mechanism comprises an elongated ratchet bar (12) with ratchet teeth and a pawl (13), said ratchet bar (12) being fixedly arranged on said body (1), said pawl (13) being arranged on said first piston (10) rod.

8. The internally threaded pipe sealing head of claim 7, wherein said ratchet mechanism further comprises a paddle (14) for controlling a pawl (13), said paddle (14) being rotatably mounted on the rod of said first piston (10), one end of said paddle (14) being fixedly connected to said pawl (13) and the other end thereof forming a structure enabling a hand to rotate said paddle (14).

9. The internally threaded pipe sealing head according to claim 8, wherein said ratchet mechanism further comprises a resilient spring connecting said first piston (10) rod and said pawl (13), said spring being capable of pulling said pawl (13) towards said ratchet bar (12).

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