A pipe joint swing angle testing device and calculation method

Abstract

The invention relates to the technical field of pipe joint swing angle measurement, and in particular to a pipe joint swing angle testing device and a calculation method. The pipe joint swing angle testing device comprises a mounting plate and a baffle fixedly connected in a first pipe section, wherein the baffle is perpendicular to the axis of the first pipe section; the left end of the second pipe section is inserted into the right end of the first pipe section, the mounting plate is fixedly connected in the second pipe section, the mounting plate is perpendicular to the axis of the second pipe section and is arranged with a left and right interval with the baffle; at least two ejector-type displacement meters arranged with an axial interval around the second pipe section are fixedly connected to the mounting plate, the ejector pins of each ejector-type displacement meter extend in parallel with the axial direction of the second pipe section in the direction of the baffle and are elastically pressed against the right side of the baffle; the up and down swing angle between the first pipe section and the second pipe section can be calculated through the distance between each ejector pin and the length change value of each ejector pin, so that designers can evaluate socket joints with different structures.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline joint swing angle measurement, in particular to a pipeline joint swing angle testing device and a calculation method. Background Art

[0002] Segmented pipelines refer to the type of pipelines in which multiple pipe sections are connected by socket joints, such as ductile iron pipes, cast iron pipes, clay pipes, concrete pipes, reinforced concrete pipes, etc. Segmented pipelines are widely used in water supply and drainage projects. Socket joints are the weak points of segmented pipelines. Before the performance of the pipe section structure deteriorates, the upper and lower swing angles between the two pipe sections will be too large, which will cause leakage of the fluid inside the pipeline. Therefore, in the process of segmented pipeline design, it is particularly important to evaluate the safety performance of the upper and lower swing angles of the socket joints.

[0003] In order to avoid interference from human factors and save ground space, segmented pipelines are mostly laid underground. In order to be closer to actual working conditions and obtain more reasonable safety performance evaluation opinions of pipeline structures, buried pipeline tests are required during the segmented pipeline design process. However, there is currently a lack of test equipment to measure the up and down swing angles between adjacent pipe sections of segmented pipelines, which makes it inconvenient for designers to evaluate socket joints of different structures. Summary of the invention

[0004] The technical problem to be solved by the present invention is that: currently there is a lack of a test device for measuring the up and down swing angles between adjacent pipe sections of a segmented pipeline, which makes it inconvenient for designers to evaluate socket joints with different structures.

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a pipe joint swing angle test device, which is used to test the up and down swing angle between a first pipe section and a second pipe section, wherein the left end of the second pipe section is inserted into the right end of the first pipe section, and the pipe joint swing angle test device comprises a mounting plate and a baffle fixedly connected to the first pipe section, wherein the baffle is perpendicular to the axis of the first pipe section;

[0006] The mounting plate is fixedly connected in the second pipe section, the mounting plate is perpendicular to the axis of the second pipe section and is spaced apart from the baffle to the left and right; at least two ejector-type displacement meters are fixedly connected to the mounting plate, each of the ejector-type displacement meters is spaced apart around the axial direction of the second pipe section, the ejector pin of each of the ejector-type displacement meters extends toward the baffle in parallel with the axial direction of the second pipe section, and the ejector pin of each of the ejector-type displacement meters is elastically pressed against the right side of the baffle.

[0007] As a preferred embodiment, the baffle is in the shape of a circular plate, and the outer peripheral side of the baffle is provided with a first annular flange protruding to the right along the axial direction of the baffle, and the circumferential side of the first annular flange is screwed with a plurality of first fasteners, and the first fasteners are arranged at intervals around the axial direction of the baffle, and each of the first fasteners extends along the radial direction of the baffle away from the first annular flange, and each of the first fasteners abuts against the inner wall of the first pipe section.

[0008] As a preferred embodiment, the mounting plate is in the shape of a circular plate, and a second annular flange protruding to the left along the axial direction of the mounting plate is provided on the outer peripheral side of the mounting plate, and a plurality of second fasteners are screwed on the peripheral side of the second annular flange, and each of the second fasteners is arranged at intervals around the axial direction of the mounting plate, and each of the second fasteners extends in a radial direction of the mounting plate away from the second annular flange, and each of the second fasteners abuts against the inner wall of the second pipe section.

[0009] As a preferred solution, the mounting plate and the positions corresponding to the ejector-type displacement meters are provided with displacement meter mounting holes, and the needle sleeves of the ejector-type displacement meters are respectively inserted into the corresponding displacement meter mounting holes;

[0010] The side wall of each displacement meter mounting hole is provided with a third fastener extending along the radial direction of the displacement meter mounting hole, and the threaded end of each third fastener abuts against the outer side wall of the corresponding needle sleeve.

[0011] As a preferred embodiment, three thimble-type displacement meters are provided, and the three thimble-type displacement meters are evenly spaced around the axial direction of the second pipe section, and the plane formed by the axis of the thimble-type displacement meter located at the top of the mounting plate and the axis of the second pipe section is a vertical plane.

[0012] As a preferred solution, a first threading hole is provided in the middle of the baffle, and a second threading hole is provided in the middle of the mounting plate.

[0013] In the calculation method of the above-mentioned pipe joint swing angle test device, assuming that the number of the ejector pin displacement meters (5) is n+1, then:

[0014]

[0015] Wherein, α is the up-and-down swing angle between the first pipe section (1) and the second pipe section (2); Lt0 is the initial compression amount of the ejector pin (51) located at the top of the second pipe section (2); L10, L20, L30, ... Ln0 are respectively the initial compression amounts of the remaining ejector pins (51); Lti is the compression amount of the ejector pin (51) located at the top of the second pipe section after being maintained for a period of time; L1i, L2i, L3i, ... Lni are respectively the compression amounts of the remaining ejector pins (51) after being maintained for a period of time; Ly1, Ly2, Ly3, ... Lyn are respectively the vertical distances between the ejector pin (51) located at the top of the second pipe section (2) and the remaining ejector pins (51).

[0016] As a preferred option:

[0017]

[0018] Wherein, β is the left-right swing angle between the first pipe section and the second pipe section; L 10 L is the initial compression amount of the ejector pin located at the frontmost side of the second tube segment; 1i The compression amount of the ejector pin located at the frontmost side of the second tube section after a period of time; L xt , L x2 , L x3 ……L xn are respectively the distances in the horizontal direction between the ejector pin located at the frontmost side of the second pipe section and the remaining ejector pins.

[0019] As a preferred option:

[0020]

[0021] Wherein, X is the axial displacement between the first pipe section and the second pipe section.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The pipe joint swing angle testing device of the present invention comprises a mounting plate and a baffle fixedly connected in a first pipe section, wherein the baffle is perpendicular to the axis of the first pipe section; the left end of the second pipe section is inserted into the right end of the first pipe section, the mounting plate is fixedly connected in the second pipe section, the mounting plate is perpendicular to the axis of the second pipe section and is arranged with a left and right interval with the baffle; at least two ejector-type displacement meters arranged with a left and right interval around the axial direction of the second pipe section are fixedly connected to the mounting plate, the ejector pins of each ejector-type displacement meter extend in parallel with the axial direction of the second pipe section toward the baffle and are elastically pressed against the right side of the baffle; the up and down swing angle between the first pipe section and the second pipe section can be calculated through the distance between each ejector pin and the length change value of each ejector pin, so that designers can evaluate socket joints with different structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural schematic diagram of the pipeline joint swing angle testing device of the present invention installed in a pipeline;

[0025] Figure 2 It is a structural schematic diagram of a pipe joint swing angle testing device of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the mounting plate;

[0027] Figure 4 It is a structural schematic diagram of a device for testing the swing angle of multiple pipe joints installed in a pipe;

[0028] Figure 5 It is a cross-sectional view of the pipeline joint swing angle testing device of the present invention perpendicular to the pipeline axis;

[0029] Figure 6 It is a principle diagram of a calculation method of a pipe joint swing angle testing device of the present invention;

[0030] In the figure, 1, the first pipe section; 2, the second pipe section; 3, the mounting plate; 31, the second annular flange; 32, the second fastener; 33, the displacement meter mounting hole; 34, the third fastener; 35, the second threading hole; 4, the baffle; 41, the first annular flange; 42, the first fastener; 43, the first threading hole; 5, the ejector displacement meter; 51, the ejector; 52, the needle sleeve; 53, the wire; P1, the contact point between the first ejector and the baffle in the initial state; P1a, the contact point between the first ejector and the baffle after the second pipe section swings relative to the first pipe section; P1aa, the first Virtual point; P2, the contact point between the second ejector and the baffle in the initial state; P2a, the contact point between the second ejector and the baffle after the second pipe section swings relative to the first pipe section; P2aa, the second virtual point; P11, the projection point of the first ejector on the mounting plate in the initial state; P11a, the projection point of the first ejector on the mounting plate after the second pipe section swings relative to the first pipe section; P12, the projection point of the second ejector on the mounting plate in the initial state; P12a, the projection point of the second ejector on the mounting plate after the second pipe section swings relative to the first pipe section; P13, the third virtual point. DETAILED DESCRIPTION

[0031] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.

[0033] like Figures 1 to 6 As shown, a pipe joint swing angle test device of the present invention is used to test the up and down swing angle between a first pipe section 1 and a second pipe section 2. The left end of the second pipe section 2 is inserted into the right end of the first pipe section 1, and is characterized in that it includes a mounting plate 3 and a baffle 4 fixedly connected in the first pipe section 1, the baffle 4 is perpendicular to the axis of the first pipe section 1; the mounting plate 3 is fixedly connected in the second pipe section 2, the mounting plate 3 is perpendicular to the axis of the second pipe section 2 and is arranged with a left and right interval with the baffle 4; at least two ejector-type displacement meters 5 are fixedly connected to the mounting plate 3 and are arranged with an interval around the axial direction of the second pipe section 2, and the ejector pin 51 of each ejector-type displacement meter 5 extends parallel to the axial direction of the second pipe section 2 toward the baffle 4 and elastically presses against the right side of the baffle 4. The up and down swing angle between the first pipe section 1 and the second pipe section 2 can be calculated by the distance between each ejector pin 52 and the length change value of each ejector pin 52, which is convenient for designers to evaluate socket-type joints of different structures.

[0034] The baffle 4 is in the shape of a circular plate, and a first annular flange 41 protruding rightward along the axial direction of the baffle 4 is provided on the outer peripheral side of the baffle 4. A plurality of first fasteners 42 arranged at intervals in the axial direction of the baffle 4 are screwed to the peripheral side of the first annular flange 41, and each first fastener 42 extends in the radial direction of the baffle 4 in a direction away from the first annular flange 41 and abuts against the inner wall of the first pipe section 1. Specifically, the baffle 4 is arranged at a position close to the right end port of the first pipe section, and the baffle 4 can be fixed in the first pipe section 1 by rotating the first fastener 42 to adjust the length of the end of the first fastener 42 extending out of the first annular flange 41.

[0035] In this embodiment, the mounting plate 3 is in the shape of a circular plate, and a second annular flange 31 protruding to the left along the axial direction of the mounting plate 3 is provided on the outer peripheral side of the mounting plate 3. A plurality of second fasteners 32 arranged axially at intervals around the mounting plate 3 are screwed to the peripheral side of the second annular flange 31, and each second fastener 32 extends in a radial direction away from the second annular flange 31 of the mounting plate 3 and abuts against the inner wall of the second pipe section 2.

[0036] Specifically, displacement meter mounting holes 33 are provided at positions corresponding to the mounting plate 3 and each ejector-type displacement meter 5, and the needle sleeve 52 of each ejector-type displacement meter 5 is respectively inserted into the corresponding displacement meter mounting hole 33; the side wall of each displacement meter mounting hole 33 is provided with a third fastener 34 extending radially along the displacement meter mounting hole 33, and the threaded end of each third fastener 34 abuts against the outer side wall of the corresponding needle sleeve 52.

[0037] In this embodiment, Figure 4 As shown, the ends of each ejector displacement meter 5 are connected to a wire 53 for transmitting data, a first threading hole 43 is provided in the middle of the baffle 4, and a second threading hole 35 is provided in the middle of the mounting plate 3. The same pipeline generally requires multiple pipe sections to be connected in sequence. In order to evaluate multiple socket joints at the same time, the pipeline joint swing angle test device of the present invention can be set at each pipeline joint. The first threading hole 43 and the second threading hole 35 are set to facilitate the tester to arrange the wire 53.

[0038] The calculation method of the above-mentioned pipe joint swing angle test device is characterized in that, assuming that the number of the ejector pin displacement gauges 5 is n+1, then:

[0039]

[0040] Among them, α is the up and down swing angle between the first tube segment 1 and the second tube segment 2; L t0 L is the initial compression amount of the ejector pin 51 located at the top of the second pipe section 2; 10 , L 2O , L 30 ...L n0 are the initial compression amounts of the remaining ejector pins 51 respectively; L ti The compression amount of the ejector pin 51 at the top of the second pipe section after a period of time; L 1i , L 2i , L 3i ...L ni L are the compression amounts of the remaining ejector pins 51 after a period of time; y1 , L y2 , L y3 ...L yn They are respectively the distances in the vertical direction between the ejector pin 51 located at the top of the second pipe section 2 and the other ejector pins 51 .

[0041] Specifically, Figure 5As shown, in this embodiment, three ejector-type displacement meters 5 are provided, and the three ejector-type displacement meters 5 are evenly spaced around the axial direction of the second pipe section 2. The ejector 51 of the ejector-type displacement meter 5 located at the top of the mounting plate 3 is the first ejector, and the other two ejector pins 51 are the second ejector pin and the third ejector pin, respectively. The plane formed by the axis of the first ejector pin and the axis of the second pipe section 2 is the vertical plane. Among them, point P1 is the contact point between the first ejector pin and the baffle 4; P2 and P3 are the contact points between the second ejector pin and the third ejector pin and the baffle 4, respectively, and the vertical distance between P1 and P2 is Ly.

[0042] like Figure 6 As shown, Figure 6 The solid line is the simplified line of the ejector pin 51, the baffle plate 4 and the mounting plate 3 in the initial state; the dotted line is the simplified line of the ejector pin 51, the baffle plate 4 and the mounting plate 3 after the second pipe segment 2 is deflected relative to the first pipe segment 1; the contact point between the first ejector pin and the baffle plate in the initial state is P1, the projection point of the first ejector pin on the mounting plate in the initial state is P11, the distance between points P1 and P11 is the initial length of the first ejector pin, the contact point between the first ejector pin and the baffle plate after the second pipe segment swings relative to the first pipe segment is P1a, the projection point of the first ejector pin on the mounting plate after the second pipe segment swings relative to the first pipe segment is P11a, P The distance between point 11a and point P1a is the length of the first ejector after the second pipe section swings relative to the first pipe section. The distance between point P1aa and point P1a is equal to Lti-Lt0. According to the parallelogram principle, the distance between point P13 and point P2aa is equal to the distance between point P1aa and point P1a. Similarly, after the second pipe section swings relative to the first pipe section, the contact point between the second ejector and the baffle is P2a, and the distance between point P2a and the second virtual point P2aa is equal to L1i-L10. The distance between point P1a and point P13 is equal to the distance Ly1 from point P11 to point P12. Therefore, according to the triangle formed by points P1a, P13 and P2a, it can be concluded that the deflection angle of the second pipe section 2 relative to the first pipe section 1 is α, then:

[0043]

[0044] In this embodiment:

[0045]

[0046] Where β is the left-right swing angle between the first tube segment 1 and the second tube segment 2; L 10 L is the initial compression amount of the ejector pin 51 located at the frontmost side of the second tube section 2; 1i After a period of time, the compression amount of the ejector pin 51 located at the frontmost side of the second tube section 2 is maintained; L xt , L x2 , L x3 ...L xnThey are respectively the distances in the horizontal direction between the ejector pin 51 located at the frontmost side of the second pipe section 2 and the other ejector pins 51 .

[0047] In this embodiment:

[0048]

[0049] Wherein, X is the axial displacement between the first pipe segment 1 and the second pipe segment 2. Specifically, when Lti-Lt0 is greater than zero, the corresponding ejector pin 51 is extended, and when Lti-Lt0 is less than zero, the corresponding ejector pin 51 is shortened.

[0050] In summary, the pipe joint swing angle testing device of this embodiment can not only detect the swing angle of the second pipe section 2 relative to the first pipe section 1 in the vertical direction, but also detect the swing angle of the second pipe section 2 relative to the first pipe section 1 in the horizontal direction, and can also detect the elongation or shortening of the second pipe section 2 relative to the first pipe section 1, which is convenient for designers to evaluate socket joints with different structures.

[0051] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A pipe joint swing angle testing device, used to test the up and down swing angle between a first pipe section (1) and a second pipe section (2), wherein the left end of the second pipe section (2) is inserted into the right end of the first pipe section (1), characterized in that: It comprises a mounting plate (3) and a baffle (4) fixedly connected to the first pipe section (1), wherein the baffle (4) is perpendicular to the axis of the first pipe section (1); The mounting plate (3) is fixedly connected in the second pipe section (2), the mounting plate (3) is perpendicular to the axis of the second pipe section (2) and is arranged at intervals to the left and right of the baffle (4); at least two ejector-type displacement meters (5) are fixedly connected to the mounting plate (3), each of the ejector-type displacement meters (5) is arranged at intervals around the axial direction of the second pipe section (2), the ejector pins of each of the ejector-type displacement meters (5) extend in parallel with the axial direction of the second pipe section (2) toward the baffle (4), and the ejector pins of each of the ejector-type displacement meters (5) are elastically pressed against the right side of the baffle (4); The baffle (4) is in the shape of a circular plate, and a first annular flange (41) protruding rightward along the axial direction of the baffle (4) is provided on the outer peripheral side of the baffle (4), and a plurality of first fasteners (42) are screwed to the peripheral side of the first annular flange (41), and each of the first fasteners (42) is arranged at intervals in the axial direction around the baffle (4), and each of the first fasteners (42) extends in the radial direction of the baffle (4) in a direction away from the first annular flange (41), and each of the first fasteners (42) abuts against the inner wall of the first pipe section (1); The mounting plate (3) is in the shape of a circular plate. The outer peripheral side of the mounting plate (3) is provided with a second annular flange (31) protruding to the left along the axial direction of the mounting plate (3). The peripheral side of the second annular flange (31) is screwed with a plurality of second fasteners (32). The second fasteners (32) are arranged at intervals in the axial direction around the mounting plate (3). The second fasteners (32) extend in the radial direction of the mounting plate (3) away from the second annular flange (31). The second fasteners (32) abut against the inner wall of the second pipe section (2). The mounting plate (3) is provided with a displacement meter mounting hole (33) at a position corresponding to each of the ejector-type displacement meters (5), and the needle sleeve (52) of each of the ejector-type displacement meters (5) is respectively inserted into the corresponding displacement meter mounting hole (33); The side wall of each displacement meter mounting hole (33) is provided with a third fastener (34) extending radially along the displacement meter mounting hole (33), and the threaded end of each third fastener (34) abuts against the outer side wall of the corresponding needle sleeve (52).

2. The pipe joint swing angle testing device according to claim 1, characterized in that: The three thimble-type displacement meters (5) are arranged evenly spaced around the axial direction of the second pipe section (2), and the plane formed by the axis of the thimble-type displacement meter (5) located at the top of the mounting plate (3) and the axis of the second pipe section (2) is a vertical plane.

3. The pipe joint swing angle testing device according to claim 1, characterized in that: A first threading hole (43) is provided in the middle of the baffle (4), and a second threading hole (35) is provided in the middle of the mounting plate (3).

4. A calculation method for a pipe joint swing angle test device according to any one of claims 1 to 3, characterized in that: Assuming that the number of the ejector pin displacement meters (5) is n+1, then: Wherein, α is the up-and-down swing angle between the first pipe section (1) and the second pipe section (2); L t0 L is the initial compression amount of the ejector pin (51) located at the top of the second pipe section (2); 10 , L 20 , L 30 ...L n0 are respectively the initial compression amounts of the remaining ejector pins (51); L ti The compression amount of the ejector pin (51) located at the top of the second pipe section after a period of time; L 1i , L 2i , L 3i ...L ni L are respectively the compression amounts of the remaining ejector pins (51) after being maintained for a period of time; y1 , L y2 , L y3 ...L yn They are respectively the distances in the vertical direction between the ejector pin (51) located at the top of the second pipe section (2) and the remaining ejector pins (51).

5. The calculation method of the pipe joint swing angle test device according to claim 4 is characterized in that: Wherein, β is the left-right swing angle between the first pipe section (1) and the second pipe section (2); L 10 L is the initial compression amount of the ejector pin (51) located at the frontmost side of the second pipe section (2); 1i The compression amount of the ejector pin (51) located at the frontmost side of the second pipe section (2) after a period of time; L xt , L x2 , L x3 ...L xn They are respectively the distances in the horizontal direction between the ejector pin (51) located at the frontmost side of the second pipe section (2) and the remaining ejector pins (51).

6. The calculation method of the pipe joint swing angle test device according to claim 4 is characterized in that : ； Wherein, X is the axial displacement between the first pipe section (1) and the second pipe section (2).

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