Built-in conduit type streaming pipe

Abstract

The utility model provides a flow-around pipe with a built-in guide pipe, and belongs to the technical field of flow-around pipes. The flow-around pipe is provided with a positive pressure tapping hole, a positive pressure output hole, a side pressure tapping hole and a side pressure output hole. The first auxiliary pipe is arranged in the inner cavity of the streaming pipe; the positive pressure tapping hole is communicated with the positive pressure output hole, and the side pressure tapping hole is communicated with the side pressure output hole; the pressure tapping hole and the output hole are used for being externally connected with a pressure measuring device. According to the utility model, improvement is carried out on the basis of the prior art, and the prior art is simplified into an auxiliary pipe. The built-in conduit type streaming pipe provided by the utility model is simple in structure, and can completely meet the requirement of pressure tapping of a cylindrical streaming surface.

Description

Technical Field

[0001] The utility model relates to the technical field of bypass pipes, in particular to a built-in conduit type bypass pipe. Background Art

[0002] The bypass tube flowmeter is a new type of differential pressure flowmeter developed based on the pressure characteristics of the bypass cylinder. It is a practical application of the basic research results of fluid mechanics. The bypass tube is the pressure element of the bypass tube flowmeter. If the bypass tube is properly designed, the velocity coefficient is constant regardless of the Reynolds number, and the flow measurement accuracy and stability are better than other types of differential pressure flowmeters. The bypass tube flowmeter is suitable for oil, gas, and water media. It can be used for oil and natural gas measurement without resistance loss; because there is no straight pipe section requirement, it is particularly suitable for low-head large pump flow measurement.

[0003] The utility model patent with publication number CN 101393232A discloses a bypass tube flow velocity flowmeter. The patent replaces the bypass cylinder with a "fluid tube". The bypass tube section has a "positive pressure hole" and two "side pressure holes" symmetrical on the left and right. The utility model patent only provides a schematic diagram of the location of the pressure measuring holes (such as the attached manual of the utility model patent). Figure 2 ), but no specific feasible production plan was provided.

[0004] One of the manufacturing methods of the bypass pipe is 3D printing. However, 3D printing materials are mostly photosensitive resins, which have poor strength, rigidity and corrosion resistance. 3D printing with metal materials is technically difficult and expensive.

[0005] The utility model is a secondary research and development of the utility model patent with publication number CN 101393232A, and is a further simplified improvement made on the basis of the utility model patent. Utility Model Content

[0006] In view of this, in order to make up for the lack of feasible manufacturing solutions for the bypass pipe in the prior art, the utility model provides a built-in conduit type bypass pipe, which is improved on the basis of the prior art and simplified into a secondary pipe. The built-in conduit type bypass pipe provided by the utility model has a simple structure and can fully meet the requirements of taking pressure on the cylindrical bypass surface.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A built-in conduit type bypass pipe, comprising:

[0009] A bypass pipe, on which a pressure taking hole and an output hole are opened, the pressure taking hole includes a positive pressure taking hole and a positive pressure output hole, and the output hole includes a side pressure taking hole and a side pressure output hole;

[0010] A first auxiliary pipe, which is arranged in the inner cavity of the bypass pipe;

[0011] The positive pressure taking hole is connected to the positive pressure output hole, and the side pressure taking hole is connected to the side pressure output hole;

[0012] The pressure taking hole and the output hole are used for connecting an external pressure measuring device;

[0013] The pressure measuring device comprises:

[0014] A pressure-conducting pipe, one end of which is used to connect the pressure-taking hole and the output hole, and the other end of which is used to connect the differential pressure transmitter;

[0015] Electrical connection, for connecting the differential pressure transmitter and the digital display instrument;

[0016] The digital display instrument is provided with a power plug for connecting an external power source.

[0017] Preferably, the bypass pipe and the first auxiliary pipe are integrally formed;

[0018] The positive pressure taking hole and the positive pressure output hole are respectively connected to the inner cavity of the first auxiliary pipe;

[0019] The side pressure taking hole and the side pressure output hole are respectively communicated with the cavity of the bypass pipe.

[0020] Preferably, the bypass pipe and the first auxiliary pipe are integrally cast.

[0021] Preferably, the first auxiliary pipe is fixed to the bypass pipe by welding;

[0022] The positive pressure taking hole and the positive pressure output hole are respectively connected to the inner cavity of the first auxiliary pipe;

[0023] The side pressure taking hole and the side pressure output hole are respectively communicated with the cavity of the bypass pipe.

[0024] Preferably, it also includes:

[0025] A supporting auxiliary pipe, which is located in the bypass pipe and is used to support the first auxiliary pipe, and is provided with a communication hole connected to its inner cavity;

[0026] The positive pressure taking hole and the positive pressure output hole respectively penetrate the inner cavity of the first auxiliary tube;

[0027] The side pressure taking hole is connected to the communicating hole;

[0028] The side pressure output hole is communicated with the inner cavity of the supporting auxiliary tube.

[0029] Preferably, the first auxiliary pipe is milled to remove a portion of the annular outer wall and then filled with epoxy resin or sealant at the contact point with the bypass pipe.

[0030] Preferably, it also includes:

[0031] a second auxiliary pipe, located in the bypass pipe and used for supporting the first auxiliary pipe;

[0032] The positive pressure taking hole and the positive pressure output hole are respectively connected to the inner cavity of the first auxiliary pipe;

[0033] The side pressure taking hole and the side pressure output hole are respectively communicated with the inner cavity of the second auxiliary pipe.

[0034] Preferably, the space located inside the inner cavity of the bypass pipe, outside the first sub-pipe and outside the second sub-pipe is filled with epoxy resin.

[0035] Preferably, it further comprises a first pipe joint and a second pipe joint respectively arranged at two ends of the bypass pipe;

[0036] The first pipe joint and the second pipe joint are both provided with a first blind hole and a second blind hole, both ends of the second sub-pipe are respectively located in the second blind holes on the first pipe joint and the second pipe joint, and the first sub-pipe is formed between the first blind holes;

[0037] The positive pressure taking hole and the positive pressure output hole are respectively connected to the inner cavity of the first auxiliary pipe;

[0038] The side pressure taking hole and the side pressure output hole are respectively communicated with the inner cavity of the second auxiliary pipe.

[0039] Preferably, it further comprises a first pipe joint and a second pipe joint respectively arranged at two ends of the bypass pipe;

[0040] The first pipe joint and the second pipe joint are both provided with a first blind hole and a second blind hole.

[0041] The two ends of the first sub-pipe are respectively arranged in the first blind holes on the first pipe joint and the second pipe joint, and the second sub-pipe is formed between the second blind holes;

[0042] The positive pressure taking hole and the positive pressure output hole are respectively connected to the inner cavity of the first auxiliary pipe;

[0043] The side pressure taking hole and the side pressure output hole are respectively communicated with the inner cavity of the second auxiliary pipe.

[0044] Compared with the prior art, the utility model has the following beneficial effects:

[0045] The built-in conduit type flow-around pipe provided by the utility model is an improvement on the prior art, which simplifies it into a secondary pipe. The built-in conduit type flow-around pipe provided by the utility model has a simple structure and can fully meet the requirements of taking pressure on the cylindrical flow-around surface.

[0046] The built-in conduit type bypass pipe provided by the utility model can be formed by integral casting, welding, wall cutting, filling epoxy resin in the bypass pipe, and built-in pipe fittings in the bypass pipe (as described in the specific implementation method). The processing method provided by the utility model is simple and easy to operate, easy to install, and can fully meet the requirements of taking pressure on the cylindrical bypass surface. It can completely replace the bypass pipe in the invention patent with publication number CN 101393232A. The specific use and pressure measurement method can be found in the invention patent, which is introduced into the utility model in the form of full incorporation. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is an integrally cast built-in conduit type bypass pipe;

[0048] Figure 2 It is a welded built-in conduit type bypass pipe, and the positive pressure tapping hole is located at the welding point;

[0049] Figure 3 Built-in duct-type bypass pipe formed by wall cutting;

[0050] Figure 4 The bypass pipe is a built-in conduit type bypass pipe filled with epoxy resin;

[0051] Figure 5 A cross-sectional view of a bypass pipe having a built-in conduit type with a pipe joint built into the bypass pipe;

[0052] Figure 6 for Figure 5 Sectional view in the AA direction;

[0053] Figure 7 for Figure 5 Cross-sectional view in the BB direction;

[0054] In the figure, 1, bypass pipe; 11, positive pressure taking hole; 12, positive pressure output hole; 13, first side pressure taking hole; 14, second side pressure taking hole; 15, side pressure output hole; 2, first auxiliary pipe; 3, supporting auxiliary pipe; 31, connecting hole; 4, second auxiliary pipe; 5, first piping joint; 51, first blind hole; 6, second piping joint; 62, second blind hole. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0056] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0057] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0058] The utility model simplifies and improves the bypass pipe 1 in the invention patent with publication number CN 101393232A, and simplifies it into a secondary pipe. A simple and easy-to-operate manufacturing method is provided, and other contents can continue to use the contents disclosed in the invention patent. The built-in conduit type bypass pipe 1 provided by the utility model can fully meet the requirements of taking pressure on the cylindrical bypass surface. The material of the bypass pipe 1 can be selected from composite materials, 304 stainless steel, 316 stainless steel and other materials, and different materials can be selected according to the following different implementation methods.

[0059] The utility model provides methods such as integral casting, welding, wall cutting, filling epoxy resin in the flow pipe, and built-in pipe fittings in the flow pipe. The processing method provided by the utility model is simple and easy to operate, easy to install, and can fully meet the requirements of pressure measurement on the cylindrical flow surface. It can completely replace the flow pipe in the invention patent with publication number CN 101393232A. The specific use and pressure measurement method can refer to the invention patent, which is introduced into the utility model in the form of full text incorporation.

[0060] The utility model provides a built-in conduit type bypass pipe 1, comprising:

[0061] The bypass pipe 1 is provided with pressure taking holes and output holes, wherein the pressure taking holes include a positive pressure taking hole 11 and a positive pressure output hole 12, and the output holes include a side pressure taking hole and a side pressure output hole 15, wherein the side pressure taking holes may preferably include a first side pressure taking hole 13 and a second side pressure taking hole 14, and more preferably are provided on the left and right sides of the positive pressure taking hole 11, and are symmetrically arranged. Since the bypass pipe 1 is a pipeline with a certain length, the number of the positive pressure taking hole 11 and the side pressure taking hole may be multiple, and is selected according to actual needs. The positive pressure output hole 12 and the side pressure output hole 15 are provided at the sampling point;

[0062] The first auxiliary pipe 2 is arranged in the inner cavity of the bypass pipe 1, wherein the connection between the first auxiliary pipe 2 and the inner wall of the bypass pipe 1 can be preferably the following four ways, which can be selected according to actual needs;

[0063] The positive pressure taking hole 11 is connected to the positive pressure output hole 12, and the side pressure taking hole is connected to the side pressure output hole 15;

[0064] The pressure taking hole and the output hole are used for connecting an external pressure measuring device;

[0065] The pressure measuring device comprises:

[0066] A pressure-conducting pipe, one end of which is used to connect the pressure-taking hole and the output hole, and the other end of which is used to connect the differential pressure transmitter;

[0067] Electrical connection, for connecting the differential pressure transmitter and the digital display instrument;

[0068] The digital display instrument is provided with a power plug for connecting an external power source.

[0069] The pressure measuring device is not shown in the drawings of the present invention, and the pressure measuring device may adopt the pressure measuring device in the invention patent with publication number CN101393232A.

[0070] like Figure 1 As shown, the utility model provides a first embodiment of the built-in conduit type bypass pipe 1, such as, the bypass pipe 1 and the first auxiliary pipe 2 are integrally formed;

[0071] The positive pressure taking hole 11 and the positive pressure output hole 12 are respectively connected to the inner cavity of the first auxiliary pipe 2, that is, the positive water flow flows through the inner cavity of the first auxiliary pipe 2;

[0072] The side pressure taking hole and the side pressure output hole 15 are respectively connected to the cavity of the bypass pipe 1 , that is, the side water flow flows through the cavity of the bypass pipe 1 .

[0073] Specifically, it can be:

[0074] The bypass pipe 1 and the first auxiliary pipe 2 are integrally cast, a positive pressure taking hole 11 is provided on the bypass pipe 1 to penetrate the inner cavity of the first auxiliary pipe 2, a positive pressure output hole 12 is provided at other positions (sampling points) in the inner cavity of the first auxiliary pipe 2, and the positive pressure taking hole 11 and the positive pressure output hole 12 are connected through the inner cavity of the first auxiliary pipe 2. It should be noted that in this case, the positive pressure taking hole 11 and the positive pressure output hole 12 are not connected with the cavity of the bypass pipe 1;

[0075] A first side pressure taking hole 13 and a second side pressure taking hole 14 are symmetrically provided on the bypass flow tube 1 and located on the left and right sides of the positive pressure taking hole 11. The first side pressure taking hole 13 and the second side pressure taking hole 14 pass through the cavity of the bypass flow tube 1. A side pressure output hole 15 is provided at other positions (sampling points) of the bypass flow tube 1. The side pressure taking hole and the side pressure output hole 15 are connected through the inner cavity of the bypass flow tube 1.

[0076] The positive pressure taking hole 11 or the first side pressure taking hole 13 or the first side pressure taking hole 14, the positive pressure output hole 12 or the side pressure output hole 15 are connected to the differential pressure transmitter through a pressure pipe, and the differential pressure transmitter is connected to the digital display instrument through an electrical connection to realize the pressure measuring operation of the pressure measuring device.

[0077] like Figure 2 As shown, the utility model provides a second embodiment, wherein the first auxiliary pipe 2 is welded to the inner cavity side wall of the bypass pipe 1;

[0078] The positive pressure taking hole 11 and the positive pressure output hole 12 are respectively connected to the inner cavity of the first auxiliary pipe 2;

[0079] The side pressure taking hole and the side pressure output hole 15 are respectively communicated with the cavity of the bypass pipe 1 .

[0080] Specifically, it can be:

[0081] A hole is opened on the outer wall of the bypass pipe 1, and the first auxiliary pipe 2 is fixed to the bypass pipe 1 by argon arc welding (taking the bypass pipe 1 and the first auxiliary pipe 2 as stainless steel as an example). Specifically, the first auxiliary pipe 2 can be welded by a connecting piece by argon arc welding, and the other end of the connecting piece is welded to the outer wall of the bypass pipe 1, so as to achieve the first auxiliary pipe 2 being fixed to the bypass pipe 1;

[0082] After welding is completed, the bypass pipe 1 is rounded, and a positive pressure taking hole 11 and a positive pressure output hole 12 (at the sampling point) are opened to connect with the inner cavity of the first auxiliary pipe 2. The positive pressure taking hole 11 and the positive pressure output hole 12 are connected through the inner cavity of the first auxiliary pipe 2, wherein the positive pressure taking hole 11 is opened on the welding surface of the outer wall of the bypass pipe 1;

[0083] A first side pressure taking hole 13, a second side pressure taking hole 14 and a side pressure output hole 15 (at the sampling point) are opened and are connected to the cavity of the bypass tube 1 respectively. The first side pressure taking hole 13, the second side pressure taking hole 14 and the side pressure output hole 15 are connected through the cavity of the bypass tube 1.

[0084] The positive pressure taking hole 11 or the first side pressure taking hole 13 or the first side pressure taking hole 14, the positive pressure output hole 12 or the side pressure output hole 15 are connected to the differential pressure transmitter through a pressure pipe, and the differential pressure transmitter is connected to the digital display instrument through an electrical connection to realize the pressure measuring operation of the pressure measuring device.

[0085] like Figure 3 As shown, the utility model provides a third implementation, further comprising:

[0086] A supporting auxiliary pipe 3, which is located in the bypass pipe 1 and is used to support the first auxiliary pipe 2, and is provided with a connecting hole 31 connected to its inner cavity;

[0087] The positive pressure taking hole 11 and the positive pressure output hole 12 respectively penetrate the inner cavity of the first auxiliary pipe 2;

[0088] The side pressure taking hole is connected to the communication hole 31;

[0089] The lateral pressure output hole 15 is communicated with the inner cavity of the supporting auxiliary pipe 3 .

[0090] The details are as follows:

[0091] The first auxiliary pipe 2 is milled, and a portion of the annular outer wall is cut off, and the contact portion with the bypass pipe 1 is filled with epoxy resin or sealant to bond the first auxiliary pipe 2 to the inner wall of the bypass pipe 1;

[0092] A positive pressure taking hole 11 and a positive pressure output hole 12 are provided on the bypass pipe 1 and are connected to the inner cavity of the first auxiliary pipe 2 and are communicated with each other through the inner cavity of the first auxiliary pipe 2;

[0093] A first side pressure tapping hole 13, a second side pressure tapping hole 14 and a connecting hole 31 are respectively formed on the bypass pipe 1 and the supporting auxiliary pipe 3 and penetrate the inner cavity of the supporting auxiliary pipe 3, and are connected through the inner cavity of the supporting auxiliary pipe 3;

[0094] The positive pressure output hole 12 and the lateral pressure output hole 15 are both selected according to the position of the sampling point.

[0095] The positive pressure taking hole 11 or the first side pressure taking hole 13 or the first side pressure taking hole 14, the positive pressure output hole 12 or the side pressure output hole 15 are connected to the differential pressure transmitter through a pressure pipe, and the differential pressure transmitter is connected to the digital display instrument through an electrical connection to realize the pressure measuring operation of the pressure measuring device.

[0096] like Figure 4As shown, the utility model provides a fourth implementation, further comprising:

[0097] A second auxiliary pipe 4, which is located in the bypass pipe 1 and is used to support the first auxiliary pipe 2;

[0098] The positive pressure taking hole 11 and the positive pressure output hole 12 are respectively connected to the inner cavity of the first auxiliary pipe 2;

[0099] The lateral pressure taking hole and the lateral pressure output hole 15 are respectively communicated with the inner cavity of the second auxiliary pipe 4 .

[0100] The details are as follows:

[0101] A first auxiliary pipe 2 and a second auxiliary pipe 4 are arranged in the inner cavity of the bypass pipe 1, and epoxy resin is filled in the space located in the inner cavity of the bypass pipe 1 and outside the first auxiliary pipe 2 and the second auxiliary pipe 4 to fix the first auxiliary pipe 2 and the second auxiliary pipe 4;

[0102] A positive pressure taking hole 11 and a positive pressure output hole 12 are provided to penetrate the inner cavity of the first auxiliary pipe 2 and are connected through the inner cavity of the first auxiliary pipe 2;

[0103] The first side pressure taking hole 13 , the second side pressure taking hole 14 and the side pressure output hole 15 are opened to penetrate the inner cavity of the second auxiliary pipe 4 and are connected through the inner cavity of the second auxiliary pipe 4 .

[0104] The positive pressure output hole 12 and the lateral pressure output hole 15 are both selected according to the position of the sampling point.

[0105] The positive pressure taking hole 11 or the first side pressure taking hole 13 or the first side pressure taking hole 14, the positive pressure output hole 12 or the side pressure output hole 15 are connected to the differential pressure transmitter through a pressure pipe, and the differential pressure transmitter is connected to the digital display instrument through an electrical connection to realize the pressure measuring operation of the pressure measuring device.

[0106] like Figure 5-7 As shown, the utility model provides a fifth embodiment, further comprising a first pipe joint 5 and a second pipe joint 6 respectively arranged at both ends of the bypass pipe 1;

[0107] The first pipe joint 5 and the second pipe joint 6 are both provided with a first blind hole 51 and a second blind hole 62, and both ends of the second sub-pipe 4 are respectively located in the second blind holes 62 on the first pipe joint 5 and the second pipe joint 6, and the first sub-pipe 2 is formed between the first blind holes 51;

[0108] The positive pressure taking hole 11 and the positive pressure output hole 12 are respectively connected to the inner cavity of the first auxiliary pipe 2;

[0109] The lateral pressure taking hole and the lateral pressure output hole 15 are respectively communicated with the inner cavity of the second auxiliary pipe 4 .

[0110] This embodiment can also be selected as follows, further comprising a first pipe joint 5 and a second pipe joint 6 respectively arranged at both ends of the bypass pipe 1;

[0111] The first pipe joint 5 and the second pipe joint 6 are both provided with a first blind hole 51 and a second blind hole 62.

[0112] The two ends of the first sub-pipe 2 are respectively arranged in the first blind holes 51 on the first pipe joint 5 and the second pipe joint 6, and the second sub-pipe 4 is formed between the second blind holes 62;

[0113] The positive pressure taking hole 11 and the positive pressure output hole 12 are respectively connected to the inner cavity of the first auxiliary pipe 2;

[0114] The lateral pressure taking hole and the lateral pressure output hole 15 are respectively communicated with the inner cavity of the second auxiliary pipe 4 .

[0115] The positive pressure taking hole 11 or the first side pressure taking hole 13 or the first side pressure taking hole 14, the positive pressure output hole 12 or the side pressure output hole 15 are connected to the differential pressure transmitter through a pressure pipe, and the differential pressure transmitter is connected to the digital display instrument through an electrical connection to realize the pressure measuring operation of the pressure measuring device.

[0116] The fifth embodiment provided by the present invention adopts two pipe joints, and respectively opens a first blind hole 51 and a second blind hole 62 on the two pipe joints, and seals and arranges a sub-pipe in the first blind hole 51 and / or the second blind hole 62, so as to form two flow channels as the first sub-pipe 2 and the second sub-pipe 4 respectively;

[0117] A positive pressure taking hole 11 and a positive pressure output hole 12 are respectively connected to the inner cavity of the first auxiliary pipe 2 and communicated through the inner cavity of the first auxiliary pipe 2; a lateral pressure taking hole and a lateral pressure output hole 15 are respectively connected to the inner cavity of the second auxiliary pipe 4 and communicated through the inner cavity of the second auxiliary pipe 4;

[0118] To ensure reliable sealing, sealant is applied to the first pipe joint 5, the second pipe joint 6 and the inner wall base of the bypass pipe 1, and sealant is applied to the first blind hole 51 and / or the second blind hole 62 to ensure the sealing between the blind hole where the auxiliary pipe is installed and the other blind hole, and to ensure the sealing of the two flow channels.

[0119] It should be noted that when the above five different forms of bypass pipes 1 are installed and used, both ends of the bypass pipes 1 need to be sealed.

[0120] The above are only preferred specific implementations of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A built-in conduit type bypass pipe, characterized in that: include: A bypass pipe, on which a pressure taking hole and an output hole are opened, the pressure taking hole includes a positive pressure taking hole and a positive pressure output hole, and the output hole includes a side pressure taking hole and a side pressure output hole; A first auxiliary pipe, which is arranged in the inner cavity of the bypass pipe; The positive pressure taking hole is connected to the positive pressure output hole, and the side pressure taking hole is connected to the side pressure output hole; The pressure taking hole and the output hole are used for connecting an external pressure measuring device; The pressure measuring device comprises: A pressure-conducting pipe, one end of which is used to connect the pressure-taking hole and the output hole, and the other end of which is used to connect the differential pressure transmitter; Electrical connection, for connecting the differential pressure transmitter and the digital display instrument; The digital display instrument is provided with a power plug for connecting an external power source.

2. The built-in conduit type bypass pipe according to claim 1, characterized in that: The bypass pipe and the first auxiliary pipe are integrally formed; The positive pressure taking hole and the positive pressure output hole are respectively connected to the inner cavity of the first auxiliary pipe; The side pressure taking hole and the side pressure output hole are respectively communicated with the cavity of the bypass pipe.

3. The inner conduit type bypass pipe according to claim 2, characterized in that: The bypass pipe and the first auxiliary pipe are integrally cast.

4. The built-in conduit type bypass pipe according to claim 1, characterized in that: The first auxiliary pipe is fixed to the bypass pipe by welding; The positive pressure taking hole and the positive pressure output hole are respectively connected to the inner cavity of the first auxiliary pipe; The side pressure taking hole and the side pressure output hole are respectively communicated with the cavity of the bypass pipe.

5. The inner conduit type bypass pipe according to claim 1, characterized in that: Also includes: A supporting auxiliary pipe, which is located in the bypass pipe and is used to support the first auxiliary pipe, and is provided with a communication hole connected to its inner cavity; The positive pressure taking hole and the positive pressure output hole respectively penetrate the inner cavity of the first auxiliary tube; The side pressure taking hole is connected to the communicating hole; The side pressure output hole is communicated with the inner cavity of the supporting auxiliary tube.

6. The built-in conduit type bypass pipe according to claim 5, characterized in that: The first auxiliary pipe is processed by milling, and a portion of the annular outer wall is cut off, and the contact portion with the bypass pipe is filled with epoxy resin or sealant.

7. The inner conduit type bypass pipe according to claim 1, characterized in that: Also includes: a second auxiliary pipe, located in the bypass pipe and used for supporting the first auxiliary pipe; The positive pressure taking hole and the positive pressure output hole are respectively connected to the inner cavity of the first auxiliary pipe; The side pressure taking hole and the side pressure output hole are respectively communicated with the inner cavity of the second auxiliary pipe.

8. The built-in conduit type bypass pipe according to claim 7, characterized in that: The space outside the inner cavity of the bypass pipe, the first sub-pipe and the second sub-pipe is filled with epoxy resin.

9. The internal conduit type bypass pipe according to claim 1, characterized in that: It also includes a first pipe joint and a second pipe joint respectively arranged at two ends of the bypass pipe; The first pipe joint and the second pipe joint are both provided with a first blind hole and a second blind hole, both ends of the second sub-pipe are respectively located in the second blind holes on the first pipe joint and the second pipe joint, and the first sub-pipe is formed between the first blind holes; The positive pressure taking hole and the positive pressure output hole are respectively connected to the inner cavity of the first auxiliary pipe; The side pressure taking hole and the side pressure output hole are respectively communicated with the inner cavity of the second auxiliary pipe.

10. The internal conduit type bypass pipe according to claim 1, characterized in that: It also includes a first pipe joint and a second pipe joint respectively arranged at two ends of the bypass pipe; The first pipe joint and the second pipe joint are both provided with a first blind hole and a second blind hole. The two ends of the first sub-pipe are respectively arranged in the first blind holes on the first pipe joint and the second pipe joint, and the second sub-pipe is formed between the second blind holes; The positive pressure taking hole and the positive pressure output hole are respectively connected to the inner cavity of the first auxiliary pipe; The side pressure taking hole and the side pressure output hole are respectively communicated with the inner cavity of the second auxiliary pipe.

Images