A pipeline air tightness detection device

Abstract

The present invention relates to the technical field of air tightness detection, and specifically discloses a pipeline air tightness detection device. The pipeline air tightness detection device provided by the present invention includes a carrier, an expansion member, an air source component and a detection component. The carrier includes an installation cavity for installing a pipeline, and the installation cavity includes an upper positioning groove and a lower positioning groove arranged on the side wall of the installation cavity; the upper positioning groove and the lower positioning groove are respectively installed with expansion members, and when the pipeline is installed in the installation cavity, the expansion member can abut against the upper positioning groove and the pipeline and the lower positioning groove and the pipeline, and the expansion member is used to close the installation cavity between the upper positioning groove and the lower positioning groove to form a sealed cavity; the air source component is used to inject gas into the sealed cavity; the detection component is used to detect the air pressure of the sealed cavity. The device has a simple structure, occupies a small space, and can quickly complete the pipeline air tightness detection operation, thereby improving the work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of air tightness detection, and in particular to a pipeline air tightness detection device. Background Art

[0002] The airtightness of a sealed container is its primary function and the most important function that a sealed container must have. However, in the field of cast pipes today, the problem of sand holes and pores in castings caused by the casting process is inevitable.

[0003] At present, the method for testing the air tightness of sealed containers is generally the "inflation pressure measurement method", that is, filling the sealed container with dry compressed air of a certain pressure value, then stopping the inflation, and performing pressure testing with a corresponding installed pressure gauge.

[0004] The above method takes a long time to assemble, the device occupies a large space, and the type of pipelines measured is single, and it is impossible to complete the rapid detection operation of multiple pipelines. Summary of the invention

[0005] The purpose of the present invention is to provide a pipeline air tightness detection device to solve the problem of complex detection operation steps and low efficiency.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A pipeline air tightness detection device comprises a carrier, an expansion piece, an air source assembly and a detection assembly; the carrier comprises an installation cavity for installing a pipeline, and the installation cavity comprises an upper positioning groove and a lower positioning groove arranged on the side wall of the installation cavity; the expansion piece is respectively installed in the upper positioning groove and the lower positioning groove, and when the pipeline is installed in the installation cavity, the expansion piece can abut against the upper positioning groove and the pipeline and the lower positioning groove and the pipeline, and the expansion piece is used to close the installation cavity between the upper positioning groove and the lower positioning groove to form a sealed cavity; the air source assembly is used to inject gas into the sealed cavity; the detection assembly is used to detect the air pressure of the sealed cavity.

[0008] Wherein, the expansion member includes an expansion airbag, the expansion airbag is connected to an airbag pump through an air pressure tube, and the airbag pump is used to inject gas into the expansion airbag.

[0009] Furthermore, the air pressure tube is connected to an air pressure switch valve, and the air pressure switch valve is controlled to inflate / deflate the expansion airbag.

[0010] Preferably, a separation tube is also provided in the sealing cavity, and the separation tube divides the installation cavity along the axial direction of the installation cavity, and divides the sealing cavity into an outer cavity arranged close to the carrier and an inner cavity arranged close to the pipeline, and the outer cavity is connected to the inner cavity; the upper positioning groove and the lower positioning groove are both opened on the side wall of the outer cavity, and the separation tube is provided with a hole for the expansion member to pass through.

[0011] Furthermore, a connecting hole is provided on the separation tube, and the connecting hole is used to connect the outer cavity and the inner cavity.

[0012] Furthermore, a plurality of the communicating holes are arranged along the circumferential direction of the side wall of the partition tube.

[0013] Preferably, the pipeline air tightness detection device further comprises an upper loading plate detachably mounted above the carrier, wherein the upper loading plate is used to position the pipeline and / or increase the length of the installation cavity.

[0014] Preferably, the pipeline air tightness detection device further comprises a lower connecting plate detachably mounted below the carrier, wherein the lower connecting plate is used to increase the length of the installation cavity.

[0015] Preferably, the air source assembly comprises a detection air pump, and the detection air pump is sealingly connected to the detection air source hole arranged between the upper positioning groove and the lower positioning groove.

[0016] Preferably, the detection assembly comprises a pressure display gauge, and the pressure display gauge is sealingly connected to a pressure display gauge hole arranged between the upper positioning groove and the lower positioning groove.

[0017] Beneficial effects of the present invention:

[0018] The expansion piece forms a sealed cavity while positioning the pipeline, which can adapt to the measurement of different types of pipelines. The relative position of the pipeline and the carrier can be adjusted so that different sections of the pipeline are placed between the two expansion pieces. By positioning and inflating and measuring the pressure of different sections of the pipeline multiple times, the air tightness detection operation of the pipeline can be completed. The air tightness detection operation of the pipeline can be completed by injecting gas into the sealed cavity and using the detection component to detect the air pressure in the sealed cavity, which solves the problem of complex detection operation steps and low efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of a pipeline air tightness detection device provided in an embodiment of the present invention.

[0020] In the figure:

[0021] 1. Carrier; 11. Mounting cavity; 111. Upper positioning groove; 112. Lower positioning groove; 12. Air source hole; 13. Pressure display gauge hole; 14. Sealing cavity; 141. Outer cavity; 142. Inner cavity; 2. Inflatable airbag; 3. Pressure display gauge; 4. Air pressure tube; 5. Air pressure switch valve; 6. Separation tube; 61. Connecting hole; 7. Upper loading plate; 8. Lower loading plate. DETAILED DESCRIPTION

[0022] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0026] like Figure 1As shown, this embodiment provides a pipeline air tightness detection device, including a carrier 1, an expansion member, an air source assembly and a detection assembly. The carrier 1 includes an installation cavity 11 for installing a pipeline, and the installation cavity 11 includes an upper positioning groove 111 and a lower positioning groove 112 arranged on the side wall of the installation cavity 11. The upper positioning groove 111 and the lower positioning groove 112 are respectively installed with expansion members. When the pipeline is installed in the installation cavity 11, the expansion member can abut against the upper positioning groove 111 and the pipeline and the lower positioning groove 112 and the pipeline. The expansion member is used to close the installation cavity 11 between the upper positioning groove 111 and the lower positioning groove 112 to form a sealed cavity 14; the air source assembly is used to inject gas into the sealed cavity 14; the detection assembly is used to detect the air pressure of the sealed cavity 14. The expansion piece forms a sealed cavity 14 while positioning the pipeline, which can adapt to the measurement of different types of pipelines. The relative position of the pipeline and the carrier 1 can be adjusted so that different sections of the pipeline are placed between the two expansion pieces. By positioning and inflating and measuring the pressure of different sections on the pipeline multiple times, the air tightness detection operation of the pipeline can be completed. Injecting gas into the sealed cavity 14 and using the detection component to detect the air pressure in the sealed cavity 14 can complete the air tightness detection operation of the pipeline, solving the problem of complex detection operation steps and low efficiency.

[0027] The expansion member includes an expansion airbag 2, which is connected to an airbag pump via an air pressure tube 4, and the airbag pump is used to inject gas into the expansion airbag 2. The expansion airbag 2 can quickly complete the positioning of the pipeline and the operation of forming a sealed cavity 14, and the expansion airbag 2 has a good sealing effect, a fast positioning speed, and is economical and environmentally friendly. In this embodiment, the upper positioning groove 111 and the lower positioning groove 112 are annular grooves, and the expansion airbag 2 is annular. The above arrangement further ensures the sealing effect of the sealed cavity 14. The selection of expansion airbags 2 of different sizes can complete the air tightness detection operation of pipelines of different diameters.

[0028] Furthermore, the air pressure pipe 4 is connected with an air pressure switch valve 5, which controls the air pressure switch valve 5 to inflate / deflate the expansion airbag 2. The provision of the air pressure switch valve 5 enables the operator to quickly complete the positioning operation of the pipeline, thereby improving the working efficiency of the device.

[0029] Preferably, a separation tube 6 is further provided in the sealing cavity 14. The separation tube 6 separates the installation cavity 11 along the axial direction of the installation cavity 11, and separates the sealing cavity 14 into an outer cavity 141 provided near the carrier 1 and an inner cavity 142 provided near the pipeline, and the outer cavity 141 is connected to the inner cavity 142; the upper positioning groove 111 and the lower positioning groove 112 are both provided on the side wall of the outer cavity 141, and a hole for the expansion member to pass through is provided on the separation tube 6. The separation setting of the separation tube 6 allows the gas injected by the gas source assembly to first enter the outer cavity 141, and then enter the inner cavity 142 connected to the pipeline. The above setting not only positions the expansion airbag 2, but also changes the position of the injected gas when it is close to the pipeline.

[0030] Furthermore, a connecting hole 61 is provided on the separation tube 6, and the connecting hole 61 is used to connect the outer cavity 141 and the inner cavity 142. In this embodiment, a plurality of connecting holes 61 are provided along the circumference of the side wall of the separation tube 6. The provision of a plurality of connecting holes 61 allows the injected gas to approach the pipeline from a plurality of different directions, thereby avoiding the occurrence of deviations in the detection results due to a single gas injection position.

[0031] In this embodiment, the pipeline air tightness detection device also includes an upper loading plate 7 that can be detachably mounted above the carrier 1, and the upper loading plate 7 is used to position the pipeline and / or increase the length of the installation cavity 11. The pipeline air tightness detection device also includes a lower loading plate 8 that can be detachably mounted below the carrier 1, and the lower loading plate 8 is used to increase the length of the installation cavity 11. The provision of the upper loading plate 7 and the lower loading plate 8 enables the device to complete the detection operations of more pipeline positions and more types of pipelines. Specifically, the upper loading plate 7 and the lower loading plate 8 are both cylindrical structures, one end of which is provided with a positioning structure that matches the pipeline or the ground; and the other end is detachably connected to the carrier 1. When it is difficult to position the pipeline located above / below the sealing cavity 14 using only the inflatable airbag 2, the positioning operations of various pipelines can be achieved by providing the upper loading plate 7 / lower loading plate 8. Furthermore, the upper end of the partition tube 6 and the end of the upper loading plate 7 detachably connected to the carrier 1 also contact the inflatable airbag 2 installed in the upper positioning groove 111, and the lower end of the partition tube 6 and the end of the lower loading plate 8 detachably connected to the carrier 1 also contact the inflatable airbag 2 installed in the lower positioning groove 112; the above-mentioned arrangement limits the position of the inflatable airbag 2, so that the installation positions of the two inflatable airbags 2 will not be offset.

[0032] Preferably, the gas source assembly includes a detection gas pump, which is sealed and connected to the detection gas source hole 12 disposed between the upper positioning groove 111 and the lower positioning groove 112. The setting of the detection gas pump can quickly complete the gas injection operation in the sealed cavity 14.

[0033] Preferably, the detection assembly includes a pressure display gauge 3, which is sealed and connected to a pressure display gauge hole 13 disposed between the upper positioning groove 111 and the lower positioning groove 112. The pressure display gauge 3 can intuitively display the air pressure in the sealing cavity 14, so that the air tightness detection operation of the pipeline can be completed quickly.

[0034] When performing the air tightness test operation on the pipeline, first select the appropriate upper loading plate 7 and lower loading plate 8, as well as the expansion airbag 2 of the corresponding size and the separator tube 6 adapted to the above-mentioned expansion airbag 2 according to the pipeline to be tested; install the upper loading plate 7, the lower loading plate 8, the two expansion airbags 2 and the separator tube 6 on the carrier 1; set the pipeline in the installation cavity 11, and place the position of the pipeline to be tested between the two expansion airbags 2; operate the air pressure switch valve 5, and the airbag air source inflates the expansion airbag 2 so that the expansion airbag 2 positions the pipeline; the test air pump injects gas into the sealing cavity 14; observe the reading of the pressure display meter 3 to complete the pipeline air tightness test operation; operate the air pressure switch valve 5, and deflate the expansion airbag 2; take out the pipeline; disassemble the upper loading plate 7, the lower loading plate 8, the two expansion airbags 2 and the separator tube 6 arranged on the carrier 1.

[0035] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A pipeline air tightness detection device, characterized in that: include: A carrier (1) comprising a mounting cavity (11) for mounting a pipeline, the mounting cavity (11) comprising an upper positioning groove (111) and a lower positioning groove (112) arranged on a side wall of the mounting cavity (11); an expansion member, wherein the expansion member is installed in the upper positioning groove (111) and the lower positioning groove (112) respectively, and when the pipeline is installed in the installation cavity (11), the expansion member can abut against the upper positioning groove (111) and the pipeline and the lower positioning groove (112) and the pipeline, and the expansion member is used to close the installation cavity (11) between the upper positioning groove (111) and the lower positioning groove (112) to form a sealed cavity (14); A gas source assembly, used for injecting gas into the sealed cavity (14); A detection component, used for detecting the air pressure of the sealed cavity (14); The expansion member comprises an expansion airbag (2), the expansion airbag (2) being connected to an airbag pump via an air pressure tube (4), the airbag pump being used to inject gas into the expansion airbag (2); A separation tube (6) is further provided in the sealing cavity (14), the separation tube (6) separating the installation cavity (11) along the axial direction of the installation cavity (11), and separating the sealing cavity (14) into an outer cavity (141) provided close to the carrier (1) and an inner cavity (142) provided close to the pipeline, the outer cavity (141) being connected to the inner cavity (142); the upper positioning groove (111) and the lower positioning groove (112) are both provided on the side wall of the outer cavity (141), and a hole for the expansion member to pass through is provided on the separation tube (6); The separation tube (6) is provided with a communication hole (61), and the communication hole (61) is used to connect the outer cavity (141) and the inner cavity (142).

2. The pipeline air tightness detection device according to claim 1, characterized in that: The air pressure tube (4) is connected to an air pressure switch valve (5), and the air pressure switch valve (5) is controlled to inflate / deflate the expansion airbag (2).

3. The pipeline air tightness detection device according to claim 1, characterized in that: A plurality of the communication holes (61) are arranged along the circumferential direction of the side wall of the partition tube (6).

4. The pipeline air tightness detection device according to claim 1, characterized in that: The pipeline air tightness detection device further comprises an upper loading plate (7) detachably mounted above the carrier (1), wherein the upper loading plate (7) is used to position the pipeline and / or increase the length of the installation cavity (11).

5. The pipeline air tightness detection device according to claim 1, characterized in that: The pipeline air tightness detection device further comprises a lower connecting plate (8) detachably mounted below the carrier (1), wherein the lower connecting plate (8) is used to increase the length of the installation cavity (11).

6. The pipeline air tightness detection device according to claim 1, characterized in that: The air source component comprises a detection air pump, which is sealed and connected to a detection air source hole (12) disposed between the upper positioning groove (111) and the lower positioning groove (112).

7. The pipeline air tightness detection device according to claim 1, characterized in that: The detection component comprises a pressure display gauge (3), wherein the pressure display gauge (3) is sealed and connected to a pressure display gauge hole (13) disposed between the upper positioning groove (111) and the lower positioning groove (112).

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