Airtight work fixture for stainless steel corrugated pipe

Abstract

The airtight tool clamp comprises a bottom plate, a front backup plate and a rear backup plate are fixed to the two ends, corresponding to a corrugated pipe, of the bottom plate respectively, an air inlet is formed in the position, corresponding to a pipe opening of the corrugated pipe, of the front backup plate, an air cylinder assembly is installed on the rear backup plate, and a sealing plug is fixed to the output end of the air cylinder assembly. The bottom plate is further provided with a supporting block used for supporting the corrugated pipe. Clamping and fixing are mainly conducted through the front backup plate and the rear backup plate, the sealing plug is driven to make contact with a pipe opening in one end of the corrugated pipe after the air cylinder assembly is driven, the two ends of the corrugated pipe abut against the position between the front backup plate and the sealing plug, and therefore the pipe openings in the two ends of the corrugated pipe are in a sealed state. The front backup plate is provided with an air hole communicated with the interior of the corrugated pipe, the interior of the corrugated pipe is inflated in a sealed state, inflation is stopped and kept after the air pressure rises to a certain value, the inflation pipe is connected with an air pressure detection device in series, and in the kept state, the air tightness is good when the value of the air pressure detection device is within a constant range.

Description

Technical Field

[0001] The utility model belongs to the technical field of airtightness detection tooling, and particularly relates to an airtight tooling fixture for stainless steel bellows. Background Technique

[0002] As a flexible pressure-resistant pipe fitting, the stainless steel bellows is installed in the liquid conveying system to compensate for the mutual displacement of the connecting ends of pipelines or machines and equipment, absorb vibration energy, and can play roles such as vibration reduction and noise elimination. It has many characteristics such as good flexibility, light weight, corrosion resistance, fatigue resistance, and resistance to high and low temperatures.

[0003] As a connecting component, the stainless steel bellows needs to ensure that the finished product has no air holes and the welding joint has good sealing performance. Therefore, in some specific cases, the bellows needs to be subjected to airtightness detection before leaving the factory to ensure that the product quality is absolutely qualified. Therefore, the utility model prepares a tooling fixture for the airtightness detection of stainless steel bellows to fix the bellows and facilitate ensuring good fixity of the bellows during the detection process. Content of the Utility Model

[0004] The purpose of the utility model is to provide an airtight tooling fixture for stainless steel bellows, and prepare a tooling fixture for the airtightness detection of stainless steel bellows to fix the bellows and facilitate ensuring good fixity of the bellows during the detection process.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] The airtight tooling fixture for stainless steel bellows includes a bottom plate. The upper side of the bottom plate is used to install and fix the bellows. The front support plate and the rear support plate are respectively fixed at both ends of the bottom plate corresponding to the bellows. An air inlet hole is opened at the position of the front support plate corresponding to the bellows pipe orifice. A cylinder assembly is installed on the rear support plate, and a sealing plug is fixed at the output end of the cylinder assembly, which is used to approach and seal the end pipe orifice of the bellows under the driving action of the cylinder assembly;

[0007] The bottom plate is also provided with a support block for supporting the bellows to keep the bellows horizontal.

[0008] Further, circular grooves are opened at the positions of the front support plate and the sealing plug corresponding to the bellows pipe orifice, and sealing rubber pads are installed in the circular grooves.

[0009] Further, there are multiple support blocks, which are fixed on the upper side of the bottom plate and arranged at intervals along the length direction of the bellows. A groove body for accommodating the bellows is opened on the upper side of the support block, and the cross section of the groove body is arc-shaped.

[0010] Further, a rubber ring is installed in the corresponding groove of the support block. The cross-section of the rubber ring is arc-shaped and is used for snap-fixing the corrugated pipe. The rubber ring has a convex rib inwardly corresponding to the buckle side. A sliding piece is also installed between the rubber ring and the groove of the support block. The cross-section of the sliding piece is arc-shaped and matches the inner side wall of the groove. The bottom of the sliding piece has a slide rail, and the bottom of the groove has a sliding groove that cooperates with the slide rail for sliding. The rubber ring is installed on the sliding piece.

[0011] The rubber ring is detachably installed on the sliding piece. A limiting strip is fixed on the inner arc side of the sliding piece, and a limiting groove for accommodating the limiting strip is provided on the outer arc side of the rubber ring.

[0012] The utility model has the following beneficial effects: This tooling fixture is mainly clamped and fixed by the front backrest and the rear backrest. The rear backrest is equipped with a cylinder assembly to improve the automation level. The corrugated pipe is a straight pipe structure with a horizontal axis. After driving the cylinder assembly, the sealing plug is driven to contact one end of the corrugated pipe, so that both ends of the corrugated pipe respectively abut between the front backrest and the sealing plug, and thus the two ends of the corrugated pipe are in a sealed state.

[0013] The front backrest has air holes communicating with the inside of the corrugated pipe. In the sealed state, the inside of the corrugated pipe is inflated. After the air pressure rises to a certain value, the inflation is stopped and maintained. The inflation pipe is connected in series with a pressure detection device. In the maintained state, if the value of the pressure detection device is within a constant range, it indicates good air tightness. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below.

[0015] Figure 1 : Structural schematic diagram of the present utility model.

[0016] Figure 2 : Structural schematic diagram of the present utility model in the disassembled state of the corrugated pipe.

[0017] Figure 3 : Structural schematic diagram of the support block of the present utility model in the disassembled state.

[0018] In the drawings, the list of components represented by each reference numeral is as follows: bottom plate 1, corrugated pipe 3, front backrest 11, rear backrest 12, air inlet hole 13, cylinder assembly 2, sealing plug 21, support block 4, circular groove 14, sealing gasket 15, groove body 41, rubber ring 5, convex rib 51, sliding piece 6, slide rail 61, sliding groove 42, limiting strip 62, limiting groove 52. Detailed Embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0020] As Figure 1-2 shown: The airtight fixture for stainless steel bellows includes a bottom plate 1. The bottom plate is a rectangular plate structure, and there are also handles on both sides for easy movement. The upper side of the bottom plate 1 is used to install and fix the bellows 3. The front support plate 11 and the rear support plate 12 are respectively fixed at both ends of the bottom plate 1 corresponding to the bellows 3. The lower sides of the front support plate and the rear support plate are vertically fixed to the upper side of the bottom plate. The front support plate 11 is provided with an air inlet hole 13 at the position corresponding to the pipe orifice of the bellows 3, which is used for the air inlet pipe to be connected to the inside of the corresponding bellows for inflation. The rear support plate 12 is equipped with a cylinder assembly 2, and the output end of the cylinder assembly 2 is fixed with a sealing plug 21, which is used to approach and seal the end pipe orifice of the bellows 3 under the driving action of the cylinder assembly 2; the sealing plug is a cylindrical structure, the axis is horizontal, and the end is circular, which is used to cover and seal the bellows pipe orifice.

[0021] The bottom plate 1 is also equipped with a support block 4 for supporting the bellows 3, which is used to keep the bellows 3 horizontal.

[0022] This fixture is mainly clamped and fixed by the front support plate and the rear support plate. The rear support plate is equipped with a cylinder assembly to improve the automation level. The bellows is a straight pipe structure with a horizontal axis. After driving the cylinder assembly, the sealing plug is driven to contact one end pipe orifice of the bellows, so that both ends of the bellows are respectively abutted between the front support plate and the sealing plug, and thus the pipe orifices at both ends of the bellows are in a sealed state.

[0023] The front support plate has an air hole communicating with the inside of the bellows. In the sealed state, the inside of the bellows is inflated. After the air pressure rises to a certain value, the inflation is stopped and maintained. The air inlet pipe is connected in series with a pressure detection device. In the maintained state, if the value of the pressure detection device is within a constant range, it indicates good airtightness.

[0024] Circular grooves 14 are respectively provided at the positions of the front support plate 11 and the sealing plug 21 corresponding to the pipe orifice of the bellows 3, and sealing rubber pads 15 are installed in the circular grooves 14. When the front support plate and the sealing plug contact the bellows pipe orifice, the sealing rubber pad can be compressed to prevent air leakage gaps due to rigid contact. The sealing rubber pad is made of rubber or silica gel. A small hole is also provided in the center of the sealing rubber pad corresponding to the front support plate for alignment with the air inlet hole. The support blocks 4 are multiple, fixed on the upper side of the bottom plate 1, arranged at intervals along the length direction of the bellows 3. A groove body 41 for accommodating the bellows 3 is provided on the upper side of the support block 4, and the cross section of the groove body 41 is arc-shaped. The specific number of the support blocks is two. By setting the groove body, it is used to stably support the bellows and prevent the bellows from displacing in the horizontal direction. The support height just makes the bellows pipe orifice side align with the sealing plug.

[0025] As shown Figure 3 in the figure: A rubber ring 5 is installed in the corresponding groove of the support block 4. The cross-section of the rubber ring 5 is arc-shaped and is used for snap-fixing the corrugated pipe 3. The rubber ring 5 has a convex rib 51 inwardly corresponding to the buckle side. The convex rib is used for limiting and for clamping the corrugated pipe to improve stability.

[0026] A sliding piece 6 is also installed between the rubber ring 5 and the groove body 41 of the support block 4. The cross-section of the sliding piece 6 is arc-shaped and matches the inner side wall of the groove body 41. The bottom of the sliding piece 6 has a slide rail 61, and the bottom of the groove body 41 has a sliding groove 42 that cooperates with the slide rail 61 for sliding. The rubber ring 5 is installed on the sliding piece 6. When installing the corrugated pipe, first support the corrugated pipe on the support block, and then start the cylinder assembly for the clamping process. Since the surface of the corrugated pipe has a corrugated end, it is difficult for the rubber ring to have relative displacement after fixing the corrugated pipe when the corrugated pipe is snapped into the rubber ring. Therefore, a transition is made between the rubber ring and the groove body through the sliding piece, and the displacement difference generated during the clamping process is compensated by the sliding fit between the sliding piece and the sliding groove.

[0027] The rubber ring 5 is detachably installed on the sliding piece 6. A limiting strip 62 is fixed on the inner arc side of the sliding piece 6, and the outer arc side of the rubber ring 5 has a limiting groove 52 for accommodating the limiting strip 62. Since the calibers of the corrugated pipes to be tested are not necessarily the same, appropriate rubber rings can be selected according to the different calibers of the corrugated pipes, and at the same time, the aging rubber rings can be replaced.

[0028] This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can well understand and utilize the present invention.

Claims

1. The airtight fixture for stainless steel bellows is characterized in that: It includes a bottom plate (1). The upper side of the bottom plate (1) is used to install and fix the bellows (3). The front support plate (11) and the rear support plate (12) are respectively fixed at both ends of the bottom plate (1) corresponding to the bellows (3). An air inlet hole (13) is opened at the position corresponding to the pipe orifice of the bellows (3) on the front support plate (11). A cylinder assembly (2) is installed on the rear support plate (12). The output end of the cylinder assembly (2) is fixed with a sealing plug (21) for approaching and sealing the pipe orifice at the end of the bellows (3) under the driving action of the cylinder assembly (2). The bottom plate (1) is also installed with a support block (4) for supporting the bellows (3) to keep the bellows (3) horizontal.

2. The airtight tooling fixture for stainless steel corrugated pipes according to claim 1, wherein: Circular grooves (14) are opened at the positions corresponding to the pipe orifices of the bellows (3) on both the front support plate (11) and the sealing plug (21), and sealing rubber pads (15) are installed in the circular grooves (14).

3. The stainless steel bellows airtight tooling fixture according to claim 1, characterized in that: There are multiple support blocks (4), which are fixed on the upper side of the bottom plate (1) and arranged at intervals along the length direction of the bellows (3). A groove body (41) for accommodating the bellows (3) is opened on the upper side of the support block (4), and the cross section of the groove body (41) is arc-shaped.

4. The stainless steel bellows airtight tooling fixture according to claim 3, characterized in that: A rubber ring (5) is installed in the groove body corresponding to the support block (4). The cross section of the rubber ring (5) is arc-shaped for clamping and fixing the bellows (3). The rubber ring (5) has a convex rib (51) inward corresponding to the clamping side.

5. The stainless steel bellows airtight fixture according to claim 4, characterized in that: A sliding piece (6) is also installed between the rubber ring (5) and the groove body (41) of the support block (4). The cross section of the sliding piece (6) is arc-shaped and matches the inner side wall of the groove body (41). The bottom of the sliding piece (6) has a slide rail (61), and the bottom of the groove body (41) has a chute (42) for sliding cooperation with the slide rail (61). The rubber ring (5) is installed on the sliding piece (6).

6. The stainless steel bellows airtight tooling fixture according to claim 5, characterized in that: The rubber ring (5) is detachably installed on the sliding piece (6). A limiting strip (62) is fixed on the inner arc side of the sliding piece (6), and a limiting groove (52) for accommodating the limiting strip (62) is provided on the outer arc side of the rubber ring (5).

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