A pressure differential pipe air tightness detection tool

Abstract

The invention discloses a tool for detecting air tightness of a differential pressure pipe, comprising a sealing box, a base, a pressure sensor, a differential pressure pipe, a bottom sealing plug, a sliding plate, an air inlet pipe, a sliding sealing ring and a horizontal sliding mechanism, wherein: the sealing box is fixed on the base, a mounting hole is opened on one side of the sealing box, the differential pressure pipe is slidably mounted in the sealing box, and the bottom sealing plug seals one end of the differential pressure pipe away from the mounting hole; the sliding plate is slidably mounted on the base, the horizontal sliding mechanism is mounted on the base to drive the sliding plate to move horizontally, the air inlet pipe is fixed on the sliding plate, the sliding sealing ring is fixed on the air inlet pipe, when the sliding plate moves to one end close to the sealing box, the air inlet pipe slides into the mounting hole and communicates with the differential pressure pipe, and the sliding sealing ring seals the gap formed between the air inlet pipe and the mounting hole; the pressure sensor is mounted in the sealing box and is used to detect the gas pressure in the sealing box. The invention has a simple structure and is convenient for increasing the efficiency of air tightness detection of the differential pressure pipe.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline air tightness detection equipment, and in particular to a pressure differential pipe air tightness detection tool. Background Art

[0002] The existing differential pressure tubes are generally made of stainless steel tubes with diameters of 8mm and 10mm and wall thickness of 1.0mm. The differential pressure tubes are characterized by thin wall thickness, small tube diameter, and high sealing requirements. After the differential pressure tubes are manufactured, they are often required to be tested for air tightness. The existing differential pressure tube air tightness test is often to seal one end of the differential pressure tube after the differential pressure tube is fixed and then perform air tightness test. This process is cumbersome and has low work efficiency. Summary of the invention

[0003] In order to solve the technical problems existing in the background technology, the present invention proposes a pressure differential pipe air tightness detection tool.

[0004] The present invention provides a pressure differential tube air tightness detection tool, comprising a sealing box, a base, a pressure sensor, a pressure differential tube, a bottom sealing plug, a sliding plate, an air inlet pipe, a sliding sealing ring and a horizontal sliding mechanism, wherein:

[0005] The sealing box is fixed on the base, a mounting hole is opened on one side of the sealing box, the pressure differential tube is slidably installed in the sealing box, the pressure differential tube slides along the axial direction of the pressure differential tube, and the axis of the pressure differential tube coincides with the axis of the mounting hole, and the bottom sealing plug seals the end of the pressure differential tube away from the mounting hole;

[0006] The sliding plate is slidably mounted on the base, and the displacement of the sliding plate in horizontal movement is parallel to the axis of the mounting hole. The horizontal sliding mechanism is mounted on the base to drive the sliding plate to move horizontally. The air intake pipe is fixed on the sliding plate, and the sliding sealing ring is fixed on the air intake pipe. When the sliding plate moves to one end close to the sealing box, the air intake pipe slides into the mounting hole and communicates with the pressure difference pipe, and the sliding sealing ring seals the gap formed between the air intake pipe and the mounting hole.

[0007] The pressure sensor is installed in the sealed box and is used to detect the gas pressure in the sealed box.

[0008] As a further optimized solution of the present invention, when the sliding plate moves to one end close to the sealing box, the end of the bottom sealing plug away from the pressure difference tube contacts the side plate of the sealing box.

[0009] As a further optimized solution of the present invention, it also includes a pad, which is arranged on the side wall of the sealing box. The pad is provided with a groove, and the groove matches the end of the bottom sealing plug away from the pressure difference tube.

[0010] As a further optimized solution of the present invention, the pad is made of elastic material.

[0011] As a further optimized solution of the present invention, the end of the bottom sealing plug away from the pressure differential tube is conical.

[0012] As a further optimized solution of the present invention, a conical sealing ring is provided on the outer wall of one end of the air inlet pipe close to the pressure difference pipe.

[0013] As a further optimized solution of the present invention, when the sliding plate moves to one end close to the sealing box, the conical sealing ring seals the gap between the air intake pipe and the pressure difference pipe.

[0014] As a further optimized solution of the present invention, the sliding sealing ring is conical, and the outer diameter of the sliding sealing ring gradually increases from an end close to the pressure differential tube to an end far from the pressure differential tube.

[0015] As a further optimized solution of the present invention, the air intake pipe and the pressure difference pipe are coaxial.

[0016] As a further optimized solution of the present invention, the sliding plate is detachably connected to the horizontal sliding mechanism.

[0017] As a further optimized solution of the present invention, a slide rail is provided on the bottom plate of the sealing box, and the slide rail matches the outer wall of the pressure difference tube.

[0018] As a further optimized solution of the present invention, the horizontal sliding mechanism is a screw slider mechanism.

[0019] As a further optimized solution of the present invention, the sealing box is made of a transparent material.

[0020] As a further optimized solution of the present invention, an airflow blowing belt is fixedly provided on the inner wall of the sealed box, and the airflow blowing belt is used to detect changes in the gas flow in the sealed box.

[0021] As a further optimized solution of the present invention, the airflow blowing belt is a colorful streamer.

[0022] In the present invention, the proposed pressure differential tube air tightness detection tool realizes the sealing of the sealing box, the fixation of the pressure differential tube and the connection between the air intake pipe and the pressure differential tube during the process in which the sliding mechanism drives the sliding plate to move toward the pressure differential tube, thereby increasing the efficiency of its air tightness detection work.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 A top view of the present invention;

[0026] Figure 3It is the AA cross-sectional view of the present invention. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] like Figure 1-3 The tooling for detecting air tightness of a differential pressure pipe shown in the figure comprises a sealing box 1, a base 2, a pressure sensor 3, a differential pressure pipe 4, a bottom sealing plug 5, a sliding plate 6, an air inlet pipe 7, a sliding sealing ring 8, a horizontal sliding mechanism 9, a pad 11, and a slide rail 14, wherein:

[0033] The sealing box 1 is fixed on the base 2 by bolts or welding. A mounting hole 10 is opened on one side of the sealing box 1. The pressure differential tube 4 is slidably installed in the sealing box 1. The slide rail 14 is fixed in the sealing box 1. The slide rail 14 matches the outer wall of the pressure differential tube 4. The pressure differential tube 4 slides on the slide rail 14. The pressure differential tube 4 slides along the axial direction of the pressure differential tube 4, and the axis of the pressure differential tube 4 coincides with the axis of the mounting hole 10. The pressure differential tube 4 slides into the sealing box 1 through the mounting hole 10, and the bottom sealing plug 5 seals the end of the pressure differential tube 4 away from the mounting hole 10.

[0034] The sliding plate 6 is slidably mounted on the base 2, and a slide groove is provided on the base 2. A slide bar is provided at the bottom of the sliding plate 6, and the slide bar matches the slide groove. The displacement of the sliding plate 6 for horizontal movement is parallel to the axis of the mounting hole 10. The horizontal sliding mechanism 9 is mounted on the base 2 to drive the sliding plate 6 to move horizontally. The horizontal sliding mechanism 9 is a screw slider mechanism, including a screw 90, a reduction motor 92 and a slider 91. The screw 90 is rotatably mounted on the base 2, and the reduction motor 92 is mounted on the base 2 and is used to drive the screw 90 to rotate. The slider 91 is mounted on the screw 90 by a threaded manner. The sliding plate 6 is detachably connected to the horizontal sliding mechanism 9, and the sliding plate 6 is detachably connected to the slider 91 by a bolt 16. The sliding plate 6 is disassembled from the slider 91, and then the sliding plate 6 is slid out of the base 2, so as to facilitate the replacement and disassembly of the differential pressure tube 4.

[0035] The air intake pipe 7 is fixed on the sliding plate 6, and the air intake pipe 7 is coaxial with the pressure differential pipe 4. The sliding sealing ring 8 is fixed on the air intake pipe 7. The sliding sealing ring 8 is conical, and the outer diameter of the sliding sealing ring 8 gradually increases from the end close to the pressure differential pipe 4 to the end away from the pressure differential pipe 4. When the sliding plate 6 moves to the end close to the sealing box 1, the air intake pipe 7 slides into the mounting hole 10 and communicates with the pressure differential pipe 4, and the sliding sealing ring 8 seals the gap formed between the air intake pipe 7 and the mounting hole 10; a conical sealing ring 12 is provided on the outer wall of the end of the air intake pipe 7 close to the pressure differential pipe 4. When the sliding plate 6 moves to the end close to the sealing box 1, the conical sealing ring 12 seals the gap between the air intake pipe 7 and the pressure differential pipe 4.

[0036] The backing plate 11 is fixed on the inner wall of the sealing box 1 opposite to the mounting hole 10. When the sliding plate 6 moves to one end close to the sealing box 1, the end of the bottom sealing plug 5 away from the pressure differential tube 4 contacts the backing plate 11. The backing plate 11 is provided with a card groove 110. The card groove 110 matches the end of the bottom sealing plug 5 away from the pressure differential tube 4. The backing plate 11 is made of elastic material, and the end of the bottom sealing plug 5 away from the pressure differential tube 4 is conical.

[0037] The pressure sensor 3 is installed in the sealed box 1 and is used to detect the gas pressure in the sealed box 1;

[0038] The sealed box 1 is made of transparent material. An airflow blowing belt 13 is fixedly provided on the inner wall of the sealed box 1. The airflow blowing belt 13 is used to detect the change of the gas flow in the sealed box 1. The airflow blowing belt 13 is a colorful streamer.

[0039] In the working process of this embodiment: the sliding plate 6 is disassembled by bolts, one end of the air inlet pipe 7 is sealed by the bottom sealing plug 5, and then the air inlet pipe 7 is slid onto the slide rail 14 through the mounting hole 10 so that the bottom of the bottom sealing plug 5 contacts the pad 11, the sliding plate 6 is slidably mounted on the slide groove 20 on the base 2, the sliding plate 6 is fixed to the slider 91 by bolts 16, the reduction motor 92 is started to drive the screw rod 90 to rotate, and then the sliding plate 6 is driven by the slider 91 to move toward the pressure differential pipe 4. In this process, the bottom sealing plug 5 is away from one end of the pressure differential pipe 4. The end gradually moves into the slot 110 and gets stuck; the sliding sealing ring 8 gradually moves into the mounting hole 10 and seals the mounting hole 10; the conical sealing ring 12 gradually moves into the pressure differential tube 4 and seals the gap between the air intake pipe 7 and the pressure differential tube 4. The air intake pipe 7 is connected to an external air compressor, and the air compressor discharges high-pressure gas into the pressure differential tube 4 through the air intake pipe 7. If the pressure detected by the pressure sensor 3 increases and the colored ribbon flutters, the pressure differential tube 4 leaks and has poor sealing. If the pressure detected by the pressure sensor 3 remains unchanged and the colored ribbon does not move, the pressure differential tube 4 has good sealing.

[0040] In order to further increase the sealing performance of the bottom sealing plug 5 and avoid the high-pressure gas in the pressure differential tube 4 pushing the sealing plug 5 out of the pressure differential tube 4 and affecting the detection of the sealing performance of the pressure differential tube 4, in the present embodiment, preferably, when the sliding plate 6 moves to one end close to the sealing box 1, the end of the bottom sealing plug 5 away from the pressure differential tube 4 contacts the side plate of the sealing box 1.

[0041] In order to prevent the bottom sealing plug 5 from sliding relative to the sealing box 1, in this embodiment, it is preferred to further include a pad 11, which is arranged on the side wall of the sealing box 1 and has a slot 110, which matches the end of the bottom sealing plug 5 away from the pressure difference tube 4.

[0042] In order to further increase the accuracy of the air tightness detection, in this embodiment, preferably, the pad 11 is made of elastic material.

[0043] In this embodiment, preferably, the end of the bottom sealing plug 5 away from the pressure difference tube 4 is conical.

[0044] In this embodiment, preferably, a conical sealing ring 12 is provided on the outer wall of the intake pipe 7 near the pressure differential pipe 4 to facilitate the connection between the intake pipe 7 and the pressure differential pipe 4 and to increase the sealing between the pressure differential pipe 4 and the intake pipe 7.

[0045] Preferably in this embodiment, when the sliding plate 6 moves to one end close to the sealing box 1, the conical sealing ring 12 seals the gap between the intake pipe 7 and the pressure difference tube 4. The conical sealing ring 12 prevents air leakage in the gap between the pressure difference tube 4 and the intake pipe 7 from affecting the accuracy of the detection result.

[0046] In this embodiment, the sliding sealing ring 8 is preferably conical, and the outer diameter of the sliding sealing ring 8 gradually increases from the end close to the pressure differential tube 4 to the end away from the pressure differential tube 4, so as to facilitate the sealing of the sliding sealing ring 8 on the mounting hole 10.

[0047] In order to facilitate the installation and disassembly of the pressure differential tube 4, in the present embodiment, the sliding plate 6 is preferably detachably connected to the horizontal sliding mechanism 9. When the pressure differential tube 4 needs to be disassembled or installed, the sliding plate 6 and the horizontal sliding mechanism 9 are disassembled, and the sliding plate 6 is slid out of the base 2 to facilitate the installation and disassembly of the pressure differential tube 4.

[0048] In this embodiment, preferably, a slide rail 14 is provided on the bottom plate of the sealing box 1 , and the slide rail 14 matches the outer wall of the pressure difference tube 4 .

[0049] In the present embodiment, the air intake pipe 7 is preferably coaxial with the pressure differential pipe 4 , so as to facilitate the communication between the air intake pipe 7 and the pressure differential pipe 4 and the sealing between the pressure differential pipe 4 and the air intake pipe 7 .

[0050] In this embodiment, the horizontal sliding mechanism 9 is preferably a screw slider mechanism, and the transmission is smooth.

[0051] In order to facilitate observation of the detection process, in this embodiment, preferably, the sealing box 1 is made of a transparent material, such as transparent plastic.

[0052] In order to further facilitate the observation of whether there is any air leakage during the airtightness detection process, in the present embodiment, preferably, an airflow blowing belt 13 is fixedly provided on the inner wall of the sealed box 1, and the airflow blowing belt 13 is used to detect the change of the gas flow in the sealed box 1. In the present embodiment, preferably, the airflow blowing belt is a colorful ribbon.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pressure differential pipe air tightness detection tool, characterized in that: It comprises a sealing box (1), a base (2), a pressure sensor (3), a pressure differential tube (4), a bottom sealing plug (5), a sliding plate (6), an air inlet pipe (7), a sliding sealing ring (8) and a horizontal sliding mechanism (9), wherein: The sealing box (1) is fixed on the base (2); a mounting hole (10) is opened on one side of the sealing box (1); the pressure differential tube (4) is slidably mounted in the sealing box (1); the pressure differential tube (4) slides along the axial direction of the pressure differential tube (4); the axial direction of the pressure differential tube (4) coincides with the axial direction of the mounting hole (10); and the bottom sealing plug (5) seals the end of the pressure differential tube (4) away from the mounting hole (10); The sliding plate (6) is slidably mounted on the base (2), and the horizontal displacement of the sliding plate (6) is parallel to the axis of the mounting hole (10). The horizontal sliding mechanism (9) is mounted on the base (2) and is used to drive the sliding plate (6) to move horizontally. The air intake pipe (7) is fixed on the sliding plate (6), and the sliding sealing ring (8) is fixed on the air intake pipe (7). When the sliding plate (6) moves to one end close to the sealing box (1), the air intake pipe (7) slides into the mounting hole (10) and communicates with the pressure difference pipe (4), and the sliding sealing ring (8) seals the gap formed between the air intake pipe (7) and the mounting hole (10); The pressure sensor (3) is installed in the sealed box (1) and is used to detect the gas pressure in the sealed box (1); When the sliding plate (6) moves to one end close to the sealing box (1), the end of the bottom sealing plug (5) away from the pressure differential tube (4) contacts the side plate of the sealing box (1); It also includes a backing plate (11), which is arranged on the side wall of the sealing box (1), and a slot (110) is provided on the backing plate (11), and the slot (110) matches with an end of the bottom sealing plug (5) away from the pressure differential tube (4); The sealed box (1) is made of a transparent material. An airflow blowing belt (13) is provided inside the sealed box (1). The airflow blowing belt (13) is used to detect changes in the flow of gas inside the sealed box (1).

2. The differential pressure tube air tightness detection tool according to claim 1, characterized in that: The backing plate (11) is made of elastic material.

3. The differential pressure pipe air tightness detection tool according to claim 1, characterized in that: The end of the bottom sealing plug (5) away from the pressure differential tube (4) is conical.

4. The differential pressure pipe air tightness detection tool according to claim 1, characterized in that: A conical sealing ring (12) is provided on the outer wall of one end of the air inlet pipe (7) close to the pressure difference pipe (4).

5. The differential pressure pipe air tightness detection tool according to claim 4, characterized in that: When the sliding plate (6) moves to one end close to the sealing box (1), the conical sealing ring (12) seals the gap between the air intake pipe (7) and the pressure difference pipe (4).

6. The differential pressure tube air tightness detection tool according to claim 1, characterized in that: The sliding sealing ring (8) is conical, and the outer diameter of the sliding sealing ring (8) gradually increases from an end close to the pressure differential tube (4) to an end away from the pressure differential tube (4).

7. The differential pressure pipe air tightness detection tool according to claim 1, characterized in that: The sliding plate (6) is detachably connected to the horizontal sliding mechanism (9).

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