Pressurized three-way pipe fitting for connecting pipes and using tool of pressurized three-way pipe fitting

Abstract

The utility model discloses an under-pressure three-way pipe fitting for connecting pipes and a using tool of the under-pressure three-way pipe fitting. The under-pressure three-way pipe fitting comprises a third connecting port used for being connected with a gas branch pipe. The third connecting port is connected with an inner plug and an outer plug; the outer wall of the inner plug is provided with a first threaded section and a conical section, and the inner side of the third connecting port is provided with a second thread matched with the first thread and a conical hole corresponding to the conical section. The using tool comprises a connecting handle, the connecting handle is connected with a ball valve through threads, the other end of the ball valve is connected with the second connecting section, and a connecting rod penetrates through a small hole and a large hole of the connecting handle to be connected with the connecting handle. The first end of the connecting rod is matched with the blind hole of the inner plug; a rotating handle is arranged at the second end, opposite to the first end, of the connecting rod, and a connecting protrusion used for screwing out the inner plug and the outer plug is arranged on the rotating handle. The under-pressure three-way pipe fitting has good sealing performance, connecting performance and anti-theft and anti-mistaken-touch performance.

Description

Technical Field

[0001] The utility model relates to the technical field of gas pipeline installation, in particular to a pressure-bearing three-way pipe fitting for connecting pipes and a use tool thereof. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] At present, in the construction of gas pipelines, especially in the reconstruction of old cities, it is often encountered that the owners do not live in the houses, and the gas branch pipes are not installed temporarily. However, in view of the potential demand for gas use in the future, it is necessary to reserve an interface on the main pipe. The sealing plug used for the reserved interface needs to consider the sealing performance, the convenience of re-opening operation and the anti-theft performance to prevent unauthorized personnel from arbitrarily pulling out the plug and causing gas leakage or theft and other safety accidents. When reconnecting the branch pipe, the existing ordinary plug needs to close the main gas valve first, and the main valve can be reopened after the branch pipe is installed, which will affect the use of other owners; and there is a risk of gas leakage caused by accidental opening. Utility Model Content

[0004] The purpose of the utility model is to provide a pressurized three-way pipe fitting for connecting pipes and a tool for using the same in order to solve the problems existing in the prior art, so as to prevent the plug from being pulled out by unauthorized personnel, and to have excellent sealing performance and be easy to operate during use, so that the gas branch pipe can be installed without closing the main gas valve.

[0005] The technical solution of the utility model is as follows:

[0006] The utility model provides a three-way pressure pipe fitting for connecting pipes, comprising a first connection port and a second connection port respectively connected to a gas main pipe, and a third connection port arranged between the first connection port and the second connection port for connecting to a gas branch pipe;

[0007] The third connection port includes a first connection section close to the gas main pipe and a second connection section far from the gas main pipe.

[0008] The first connecting section is connected to an inner plug, and the second connecting section is connected to an outer plug;

[0009] The outer wall of the inner plug is provided with a first thread section and a conical section, and the inner side of the first connecting section is provided with a second thread matching the first thread and a conical hole corresponding to the conical section.

[0010] Based on the matching of the first thread and the second thread, the first connecting section and the inner plug of the third connecting port are tightly connected, which in turn drives the tapered hole and the conical section to tightly abut against each other, and causes the conical section and the tapered hole to produce a slight deformation, so that the inner plug is sealed and connected to the first connecting section, thereby realizing the sealing of the third connecting port.

[0011] According to a preferred embodiment, the conical segment includes a first conical segment and a second conical segment facing each other, the first conical segment and the second conical segment are inclined in opposite directions and form a first deformation space on the conical segment. The setting of the first deformation space provides a feasible space for the deformation of the conical segment, and the auxiliary conical segment is more likely to produce a slight deformation, thereby enhancing the tightness of the connection between the conical segment and the conical hole, and reducing the probability of damage to the conical segment and the conical hole.

[0012] According to a preferred embodiment, the diameter of the wide end of the first conical segment is larger than the diameter of the first threaded segment, and the second conical segment includes a wide end close to the second connecting segment and a narrow end close to the first deformation space; the diameter of the narrow end of the second conical segment is larger than the diameter of the wide end of the first conical segment, so that the wide end of the first conical segment and the narrow end of the second conical segment can both contact the inner wall of the tapered hole, adding a layer of sealing and improving the sealing performance.

[0013] According to a preferred embodiment, a first blind hole is provided at one end of the inner plug away from the gas main pipe, and a group of first connecting holes are provided outside the first blind hole. When in use, a special tool is required to connect with the first connecting hole and then rotate the inner plug, screw the inner plug into the first connecting section, and block the third connecting port. The first blind hole is used to connect with an opening tool to assist in screwing out the inner plug. Preferably, no thread is provided in the first blind hole.

[0014] According to a preferred embodiment, the end of the outer plug facing the gas main pipe is provided with a second blind hole, and the end of the outer plug facing away from the gas main pipe is provided with a set of second connection holes. The second connection holes are used to connect with special tools to assist in screwing in and out the outer plug. Such a setting makes it impossible for unauthorized personnel to screw out the outer plug without special tools.

[0015] According to a preferred embodiment, the outer wall of the outer plug is provided with a third thread segment, the inner side of the second connecting segment is provided with a fourth thread matching the third thread, and the outer plug and the second connecting segment are tightly connected based on the matching of the third thread and the fourth thread.

[0016] Another aspect of the utility model provides a tool for using a pressure-bearing three-way pipe fitting for connecting pipes as described above.

[0017] The tool comprises a connecting handle, the connecting handle is connected to a ball valve via a thread, and a first sealing ring is arranged between the connecting handle and the ball valve to improve the air tightness of the whole device and avoid gas leakage when the inner plug is opened;

[0018] The other end of the ball valve can be connected to the second connecting section by setting a fifth thread matching the fourth thread on the outside; the setting of the ball valve makes it possible to block the third connecting port through the ball valve after opening the inner plug, so that the gas branch pipe can be safely connected without causing gas leakage.

[0019] The connecting handle is provided with a large hole and a small hole;

[0020] The tool further comprises a connecting rod, which passes through the small hole and the large hole and is connected to the connecting handle; preferably, a second sealing ring is clamped in the small hole to improve the airtightness between the connecting rod and the connecting handle to prevent gas leakage. The first end of the connecting rod matches the blind hole, and preferably, a self-tapping thread is provided on the outer wall of the first end of the connecting rod. When in use, the first end of the connecting rod is tightly connected to the inner wall of the blind hole based on the self-tapping thread; a rotating handle is provided on the second end of the connecting rod opposite to the first end, and a connecting protrusion matching the shape of the second connecting hole is provided on the rotating handle. Preferably, the first connecting hole and the second connecting hole can be set to be the same, so that both can match the connecting protrusion on the rotating handle, so as to improve the practicality of the tool. Preferably, the rotating handle is set to be cylindrical, and the diameter of the rotating handle is less than or equal to the diameter of the wide end of the second conical section of the inner plug, so that the rotating handle can extend into the second connecting section of the third connecting port, connect with the end of the inner plug, and then assist in screwing the inner plug.

[0021] According to a preferred embodiment, at least two mutually opposite limiting members are provided on the connecting rod. The limiting members are, for example, latches, etc. The limiting members can prevent the connecting rod from withdrawing from the small hole, thereby preventing the connecting rod from being pushed out of the connecting handle by the pressure when the pressure in the gas main pipe is high, thereby preventing the connecting rod from being pushed out of the connecting handle by the pressure, causing danger.

[0022] According to a preferred embodiment, an auxiliary rotating rod is further connected to the side of the rotating handle, so that the rotating handle is easier to rotate.

[0023] According to a preferred embodiment, a friction resistance layer is provided on the outer side of the handle seat of the connecting handle, and the friction resistance layer is, for example, a surface layer produced by a raised pattern, a rubber material for increasing friction, or a frosted treatment.

[0024] Compared with the existing technology, the beneficial effects of the utility model are:

[0025] 1. A three-way pipe fitting under pressure for connecting pipes, which improves the sealing performance of the inner plug by matching the conical section with a special structure on the inner plug and the conical hole of the third connection port, as well as matching the first thread and the second thread; based on the setting of the special first connection hole and the second connection hole on the inner plug and the outer plug, the device needs to be opened with a special opening tool, which improves the anti-theft and anti-accidental touch performance of the device and can better ensure the safety performance of the gas pipeline and the reserved interface;

[0026] 2. A three-way pipe fitting under pressure for connecting pipes and a tool for using the same. Based on the structural matching of the third connection port, the inner plug and the tool, the third connection port can be opened without closing the ball valve during use, which does not affect the gas supply of the gas main pipe and does not cause gas leakage. It is easy to use and has little impact.

[0027] 3. A tool for using a pressurized three-way pipe fitting for connecting pipes. The structural setting of the rotating handle and the setting of the connecting protrusion on the tool enable the installation of the inner plug and the outer plug and the removal of the outer plug to be completed with one tool, making the tool more practical and portable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structural connection of a pressurized tee pipe fitting for connecting pipes;

[0029] Figure 2 It is an overall enlarged schematic diagram of a third connecting port of a pressurized tee pipe fitting for connecting pipes;

[0030] Figure 3 It is a partial enlarged schematic diagram of the A area of ​​a pressurized tee pipe fitting for connecting pipes;

[0031] Figure 4 The utility model discloses a schematic diagram of the overall structure connection of a pressurized three-way pipe fitting for connecting pipes and a tool for using the same.

[0032] Figure markings: 11-first connecting port, 12-second connecting port, 2-third connecting port, 21-first connecting section, 211-second thread, 212-conical hole, 22-second connecting section, 3-inner plug, 31-first threaded section, 32-conical section, 321-first conical section, 322-second conical section, 33-first deformation space, 34-first blind hole, 35-first connecting hole, 4-outer plug, 41-second blind hole, 42-second connecting hole, 43-third threaded section, 5-ball valve, 6-connecting handle, 61-small hole, 62-large hole, 611-second sealing ring, 63-handle seat, 7-first sealing ring, 8-connecting rod, 81-rotating handle, 811-connecting protrusion, 82-limiting member, 812-auxiliary rotating rod. DETAILED DESCRIPTION

[0033] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0035] Example 1

[0036] The utility model provides a three-way pipe fitting under pressure for connecting pipes, such as Figure 1 As shown, the three-way pipe fitting under pressure includes a first connection port 11 and a second connection port 12 respectively connected to the gas main pipe, and a third connection port 2 arranged between the first connection port 11 and the second connection port 12 for connecting to the gas branch pipe. The third connection port 2 includes a first connection section 21 close to the gas main pipe and a second connection section 22 far from the gas main pipe. The inner diameter of the first connection section 21 is smaller than the inner diameter of the second connection section 22. The first connection section 21 is connected to an inner plug 3, and the second connection section 22 is connected to an outer plug 4. Figure 2 As shown, the outer wall of the inner plug 3 is provided with a first thread section 31 and a conical section 32, and the inner side of the first connection section 21 is provided with a second thread 211 matching the first thread and a conical hole 212 corresponding to the conical section 32. Based on the matching of the first thread and the second thread 211, the first connection section 21 and the inner plug 3 are tightly connected, thereby driving the conical hole 212 and the conical section 32 to abut tightly, and causing the conical section 32 and the conical hole 212 to produce a slight deformation, so that the inner plug 3 is sealed and connected with the first connection section 21, and the third connection port 2 is blocked.

[0037] According to a preferred embodiment, Figure 3As shown, the conical segment 32 includes a first conical segment 321 and a second conical segment 322 facing each other, the first conical segment 321 and the second conical segment 322 are inclined in opposite directions and form a first deformation space 33 on the conical segment 32. The setting of the first deformation space 33 provides a feasible space for the deformation of the conical segment 32, assists the conical segment 32 to be more easily deformed, enhances the tightness of the connection between the conical segment 32 and the conical hole 212, and reduces the probability of damage to the conical segment 32 and the conical hole 212.

[0038] According to a preferred embodiment, the diameter of the wide end of the first conical segment 321 is larger than the diameter of the first threaded segment 31, and the second conical segment 322 includes a wide end close to the second connecting segment 22 and a narrow end close to the first deformation space 33; the diameter of the narrow end of the second conical segment 322 is larger than the diameter of the wide end of the first conical segment 321. This allows the wide end of the first conical segment 321 and the narrow end of the second conical segment 322 to contact the inner wall of the tapered hole 212, thereby adding a layer of sealing and improving the sealing performance.

[0039] According to a preferred embodiment, Figure 2 As shown, the end of the inner plug 3 away from the gas main pipe is provided with a first blind hole 34, and a group of first connection holes 35 are provided outside the first blind hole 34. When in use, a special tool is required to connect with the first connection hole 35 and then apply force to rotate the inner plug 3, screw the inner plug 3 into the first connection section 21, and block the third connection port 2. The first blind hole 34 is used to connect with the opening tool to assist in screwing out the inner plug 3. Preferably, no thread is provided in the first blind hole 34, and it cooperates with the self-tapping thread at the front end of the tool when in use.

[0040] According to a preferred embodiment, the end of the outer plug 4 facing the gas main pipe is provided with a second blind hole 41, and the end of the outer plug 4 facing away from the gas main pipe is provided with a group of second connection holes 42. The second connection holes 42 are used to connect with special tools to assist in screwing in and out the outer plug 4. Such a setting makes it impossible for unauthorized personnel to screw out the outer plug 4 without special tools, thereby avoiding gas leakage.

[0041] According to a preferred embodiment, the outer wall of the external plug 4 is provided with a third thread segment 43, and the inner side of the second connecting segment 22 is provided with a fourth thread matching the third thread, and the external plug 4 and the second connecting segment 22 are tightly connected based on the matching of the third thread and the fourth thread.

[0042] Example 2

[0043] This embodiment provides a tool for using a pressurized three-way pipe fitting for connecting pipes as described in Embodiment 1, such as Figure 4 As shown,

[0044] The tool includes a connecting handle 6, which is threadedly connected to a ball valve 5. A first sealing ring 7 is provided between the connecting handle 6 and the ball valve 5 to improve the air tightness of the entire device and avoid gas leakage when the inner plug 3 is opened.

[0045] The other end of the ball valve 5 can be connected to the second connecting section 22 by setting a fifth thread matching the fourth thread on the outside; the setting of the ball valve 5 makes it possible to block the third connecting port 2 through the ball valve 5 after opening the inner plug 3, so that the gas branch pipe can be safely connected without causing gas leakage.

[0046] The tool also includes a connecting rod 8, wherein a large hole 62 and a small hole 61 are provided in the connecting handle 6, and the connecting rod 8 passes through the small hole 61 and the large hole 62 to connect with the connecting handle 6; preferably, a second sealing ring 611 is clamped in the small hole 61 to improve the airtightness between the connecting rod 8 and the connecting handle 6 to prevent gas leakage. The first end of the connecting rod 8 matches the blind hole, and preferably, a self-tapping thread is provided on the outer wall of the first end of the connecting rod 8. When in use, based on the self-tapping thread, the first end of the connecting rod 8 is tightly connected to the inner wall of the first blind hole 34 of the inner plug 3. The connecting rod 8 can pass through the internal passage when the ball valve 5 is opened. A rotating handle 81 is provided on the second end of the connecting rod 8 opposite to the first end, and a connecting protrusion 811 matching the shape of the second connecting hole 42 is provided on the rotating handle 81. Preferably, the first connecting hole 35 and the second connecting hole 42 can be set to be the same, so that both can match the connecting protrusion 811 on the rotating handle 81, thereby improving the practicality of the tool. Preferably, the rotating handle 81 is set to be cylindrical, and the diameter of the rotating handle 81 is less than or equal to the diameter of the wide end of the second conical section 322 of the inner plug 3, so that the rotating handle 81 can extend into the second connecting section 22 of the third connecting port 2 and connect with the first connecting hole 35 at the end of the inner plug 3, thereby assisting in screwing in the inner plug 3.

[0047] According to a preferred embodiment, at least two mutually opposite limiting members 82 are provided on the connecting rod 8. The limiting members 82 are, for example, latches, etc. The limiting members 82 can prevent the connecting rod 8 from withdrawing from the small hole 61, thereby preventing the connecting rod 8 from being pushed out of the connecting handle 6 by the pressure when the pressure in the gas main pipe is high, causing danger.

[0048] According to a preferred embodiment, an auxiliary rotating rod 812 is further connected to the side of the rotating handle 81, so that the rotating handle 81 is easier to rotate.

[0049] According to a preferred embodiment, a friction resistance layer is disposed on the outside of the handle seat 63 of the connecting handle 6, and the friction resistance layer is, for example, a convex pattern, a rubber material with increased friction, or a surface layer produced by frosting treatment, so as to rotate the handle seat 63.

[0050] The working principle of a three-way pipe fitting with pressure for connecting pipes and its use tool of the present application is that when the owner needs gas supply, first use the use tool of embodiment 2 of the present application to remove the outer plug 4 on the three-way pipe with pressure, wrap the outer thread on the closed ball valve 5 with sealing material and then install it on the second connection section 22 of the third connection port 2 and tighten it. Pull the connecting rod 8 on the use tool to the rightmost, then connect the connecting handle 6 to the ball valve 5, tighten the handle seat 63 by hand, and the sealing ring between the handle seat 63 and the ball valve 5 plays a role in preventing gas leakage. Only then can the ball valve 5 be opened, and the connecting rod 8 is pushed out in the direction of the third connection port 2 until it can no longer be pushed, and then the rotating handle 81 is rotated to make the self-tapping thread of the connecting rod 8 tap into the first blind hole 34 of the inner plug 3, and the inner plug 3 can be screwed out from the first connection section 21 by continuing to rotate the rotating handle 81, and finally pull the connecting rod 8 to pull the inner plug 3 into the large hole 62 of the handle seat 63, close the ball valve 5, remove the tool, and then connect the gas branch pipe.

[0051] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A three-way pipe fitting under pressure for connecting pipes, characterized in that: It comprises a first connection port (11) and a second connection port (12) respectively connected to a gas main pipe, and a third connection port (2) arranged between the first connection port (11) and the second connection port (12) for connecting to a gas branch pipe; The third connection port (2) comprises a first connection section (21) close to the gas main pipe and a second connection section (22) far from the gas main pipe. The first connecting section (21) is connected to an inner plug (3), and the second connecting section (22) is connected to an outer plug (4); The outer wall of the inner plug (3) is provided with a first thread section (31) and a conical section (32), and the inner side of the first connecting section (21) is provided with a second thread (211) matching the first thread and a conical hole (212) corresponding to the conical section (32).

2. A three-way pipe fitting under pressure for connecting pipes according to claim 1, characterized in that: The conical segment (32) comprises a first conical segment (321) and a second conical segment (322) facing each other, the first conical segment (321) and the second conical segment (322) are inclined in opposite directions and form a first deformation space (33) on the conical segment (32).

3. A three-way pipe fitting under pressure for connecting pipes according to claim 2, characterized in that: The diameter of the wide end of the first conical section (321) is larger than the diameter of the first threaded section (31); the second conical section (322) comprises a wide end close to the second connecting section (22) and a narrow end close to the first deformation space (33); the diameter of the narrow end of the second conical section (322) is larger than the diameter of the wide end of the first conical section (321).

4. A three-way pipe fitting under pressure for connecting pipes according to claim 1, characterized in that: A first blind hole (34) is provided at one end of the inner plug (3) away from the gas main pipe, and a group of first connecting holes (35) is provided outside the first blind hole (34).

5. The three-way pipe fitting under pressure for connecting pipes according to claim 1, characterized in that: The end of the outer plug (4) facing the gas main pipe is provided with a second blind hole (41), and the end of the outer plug (4) facing away from the gas main pipe is provided with a group of second connection holes (42).

6. A three-way pipe fitting under pressure for connecting pipes according to claim 1, characterized in that: The outer wall of the outer plug (4) is provided with a third thread segment (43), and the inner side of the second connecting segment (22) is provided with a fourth thread matching the third thread.

7. A tool for using a three-way pipe fitting under pressure for connecting pipes, used in conjunction with a three-way pipe fitting under pressure for connecting pipes according to any one of claims 1 to 6, characterized in that: The tool comprises a connecting handle (6), the connecting handle (6) comprises a handle seat (63), the connecting handle (6) is connected to a ball valve (5) via a thread, A first sealing ring (7) is provided between the connecting handle (6) and the ball valve (5); The other end of the ball valve (5) can be connected to the second connecting section (22) by providing a fifth thread matching the fourth thread on the outer side; a large hole (62) and a small hole (61) are provided in the connecting handle (6); The tool also includes a connecting rod (8), which passes through the small hole (61) and the large hole (62) to be connected to the connecting handle (6); the first end of the connecting rod (8) matches the first blind hole (34); a rotating handle (81) is provided on the second end of the connecting rod (8) opposite to the first end, and a connecting protrusion (811) is provided on the rotating handle (81) that is adapted in shape to the second connecting hole (42).

8. The tool for using a three-way pipe fitting under pressure for connecting pipes according to claim 7, characterized in that: A self-tapping thread is provided on the first end of the connecting rod (8).

9. The tool for using a three-way pipe fitting under pressure for connecting pipes according to claim 7, characterized in that: At least two mutually opposing limiting members (82) are arranged on the connecting rod (8).

10. The tool for using a three-way pipe fitting under pressure for connecting pipes according to claim 7, characterized in that: A friction resistance layer is arranged on the outer side of the handle seat (63).

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