Kitchen range pipe airtightness detection machine

Abstract

The utility model provides a kitchen range pipe airtightness detection machine which comprises a water tank, an airtight support is vertically and movably arranged in the water tank, and a pair of clamp modules are symmetrically and relatively movably arranged on the airtight support; the clamp module comprises a bottom plate, a plurality of clamp die holders are arranged on the inner side of the bottom plate at intervals, and clamp upper dies are correspondingly arranged above the clamp lower dies; a plurality of airtight rubber pads which are movably arranged in the direction parallel to the length direction of the airtight support are arranged on the outer side of the bottom plate at intervals, a first connecting base is coaxially connected to the outer side of each airtight rubber pad, an air inlet connector is coaxially connected to the outer side of each first connecting base, and the interiors of the air inlet connectors, the interiors of the first connecting bases and the interiors of the airtight rubber pads are sequentially communicated. The inner side end of the airtight rubber mat is coaxially communicated with an air outlet, and the outer wall of the air inlet connector is communicated with an air inlet. According to the scheme, the naked pipe of the stove pipe can be directly detected, the detection efficiency and the detection precision are improved, the structure is simple, and operation is easy.

Description

Technical Field

[0001] This application relates to the field of pipe testing technology, and in particular to a stove pipe airtightness testing machine. Background Technology

[0002] Stainless steel corrugated flexible hoses used for connecting gas appliances, often referred to as stove hoses, are the terminal gas transmission pipes for residential natural gas stoves and gas water heaters. They require high levels of sealing performance, resistance to damage, and corrosion resistance. Air tightness testing of stove hoses is often conducted after the plastic sheathing or welding process. However, this not only makes observation difficult and reduces testing efficiency, but the plastic sheath can also interfere with the test results. Furthermore, if unusable hoses are detected during subsequent testing, it increases costs and reduces production efficiency. Utility Model Content

[0003] To address the shortcomings of the existing technology, this application provides a stove pipe airtightness testing machine, which can directly test the bare pipe of the stove pipe, improving testing efficiency and accuracy. It has a simple structure and is easy to operate.

[0004] To achieve the above objectives, the present invention employs the following technology:

[0005] A stove pipe airtightness testing machine includes a water tank, an airtight support that moves vertically inside the tank, and a pair of clamp modules that move symmetrically and relative to each other along the length of the airtight support.

[0006] The fixture module includes a base plate, and multiple fixture mold seats are spaced apart on the inner side of the base plate. The fixture mold seats are used to hold the lower fixture mold. Above each of the lower fixture molds, an upper fixture mold is correspondingly provided, and the upper fixture mold is vertically movable.

[0007] Multiple airtight rubber pads are spaced apart on the outer side of the base plate and moved parallel to the length direction of the airtight support. Each airtight rubber pad corresponds to a fixture mold base, and the axis of the airtight rubber pad is collinear with the axis of the corresponding lower mold cavity of the fixture. A first connecting seat is coaxially connected to the outer side of the airtight rubber pad, and an air inlet connector is coaxially connected to the outer side of the first connecting seat. The air inlet connector, the first connecting seat, and the interior of the airtight rubber pad are sequentially connected. An air outlet is coaxially connected to the inner end of the airtight rubber pad. The diameter of the airtight rubber pad is larger than the outer diameter of the stove pipe, and the diameter of the air outlet is smaller than the inner diameter of the stove pipe. An air inlet is connected to the outer wall of the air inlet connector.

[0008] The beneficial effects of this utility model are as follows:

[0009] 1. The fixture part adopts a modular design. The airtight bracket only needs to bear the weight of the fixture module, avoiding the need for the airtight bracket to bear the thrust of the clamping cylinder when the clamping cylinder and the fixture are directly installed on the airtight bracket. This is conducive to the simplification and weight reduction of the airtight bracket.

[0010] 2. Directly test the airtightness of the bare pipe of the stove. If there are pinholes or damage in the pipe, they can be observed more easily. This eliminates the interference of the plastic skin on the test results. Early detection of problematic pipes can avoid subsequent processes such as coating and welding, which is conducive to improving the yield rate and reducing costs and increasing efficiency. Attached Figure Description

[0011] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of this invention.

[0012] Figure 1 This is a perspective view of the overall structure of an embodiment of this application.

[0013] Figure 2 This is a three-dimensional structural view of the airtight support according to an embodiment of this application.

[0014] Figure 3 This is a schematic diagram of the connection structure between the airtight support and the bottom of the clamp module in an embodiment of this application.

[0015] Figure 4 This is a perspective view of the overall structure of the fixture module according to an embodiment of this application.

[0016] Figure 5 This is a partial three-dimensional view of the fixture module according to an embodiment of this application.

[0017] Figure 6 This is a top view of the fixture module according to an embodiment of this application.

[0018] Figure 7 This is a cross-sectional schematic diagram of the air intake connector, the first connecting seat, and the airtight rubber pad in an embodiment of this application.

[0019] Figure 8 for Figure 3 A magnified view of a portion of point A in the middle. Detailed Implementation

[0020] To make the objectives, technical solutions and advantages of the present utility model clearer, the implementation methods of the present utility model will be described in detail below with reference to the accompanying drawings. However, the embodiments described in the present utility model are only some embodiments of the present utility model, and not all embodiments.

[0021] This application provides a stove pipe airtightness testing machine, such as Figures 1-6As shown, it includes a water tank 1, inside which a vertically movable airtight support 2 is provided, and a pair of clamp modules 3 are provided on the airtight support 2 symmetrically and relatively movable along its length.

[0022] The fixture module 3 includes a base plate 31, with multiple fixture mold seats 32 spaced apart on the inner side of the base plate 31. The fixture mold seats 32 are used to hold lower fixture molds 33. Upper fixture molds 34 are correspondingly provided above each lower fixture mold 33, and the upper fixture molds 34 are vertically movable. Figure 8 As shown, the clamp mold base 3 is a rectangular prism structure. Its top has a U-shaped groove along the length of the airtight support 2, and an inner groove is formed parallel to the width of the airtight support 2, facilitating the insertion of the lower clamp mold 33. The upper clamp mold 34 and the lower clamp mold 33 are also rectangular prism structures. The bottom of the upper clamp mold 34 has a semi-circular groove along the length of the airtight support 2, and the top of the lower clamp mold 33 has a semi-circular groove along the length of the airtight support 2, facilitating the fixing of the stove pipe end. The inner end of each semi-circular groove has a coaxial annular boss to mate with the corrugated groove at the stove pipe end, further preventing the stove pipe end from slipping out.

[0023] Multiple airtight rubber pads 35 are spaced apart on the outer side of the base plate 31 and are movable parallel to the length direction of the airtight support 2. Each airtight rubber pad 35 corresponds to a fixture mold base 32, and the axis of the airtight rubber pad 35 is collinear with the axis of the cavity of the corresponding lower mold 33 of the fixture. A first connecting seat 36 is coaxially connected to the outer side of the airtight rubber pad 35, and an air inlet connector 37 is coaxially connected to the outer side of the first connecting seat 36. The air inlet connector 37, the first connecting seat 36, and the interior of the airtight rubber pad 35 are sequentially connected. An air outlet 38 is coaxially connected to the inner end of the airtight rubber pad 35. The diameter of the airtight rubber pad 35 is larger than the outer diameter of the stove tube, and the diameter of the air outlet 38 is smaller than the inner diameter of the stove tube, so that when the airtight rubber pad 35 seals the end of the stove tube, a complete seal can be achieved, and the compressed air flowing out from the air outlet 38 can only be received by the interior of the stove tube. An air inlet 39 is connected to the outer wall of the air inlet connector 37.

[0024] When performing an airtightness test on the cooktop pipe, the equipment is first reset: the airtight support 2 rises to the predetermined highest point, the airtight rubber pad 35 retracts to the predetermined farthest point, and the upper mold 34 of the clamp rises to the predetermined highest point. Then, the first corrugated groove near the pipe end of the cooktop pipe to be tested is placed in the cavity of the lower mold 33 of the clamp. The upper mold 34 of the clamp is moved downward, and after the upper mold 34 and the lower mold 33 of the clamp are closed, one end of the cooktop pipe is clamped and fixed. The clamping and fixing of the other end of the cooktop pipe is completed in the same way.

[0025] After both ends of the cooktop pipe are clamped, the airtight rubber pad 35 is moved inward to seal both ends of the cooktop pipe. Then, compressed air is introduced into the air inlet connector 37 through the air inlet 39. The compressed air flows out from the air outlet 38 after passing through the inner cavity of the air inlet connector 37, the inner cavity of the first connecting seat 36, and the inner cavity of the airtight rubber pad 35, and flows into the inside of the cooktop pipe body.

[0026] Move the airtight support 2 downwards until the airtight support 2 and the clamp module 3 are both immersed in the water in the water tank 1. At this time, the entire section of the stove pipe is also completely immersed in the water. After immersion for a predetermined time, observe whether there are continuous bubbles in the stove pipe during this time period. If bubbles are found, it means that the stove pipe has pinholes or damage and cannot be used.

[0027] After the test is completed, move the airtight support 2 upward to the predetermined highest point, and move the airtight rubber pad 35 outward to the predetermined farthest end. The upper mold 34 of the clamp rises to the predetermined highest point. After the equipment is reset, take out the stove tube that has been tested and classify and store it according to the test results.

[0028] Specifically, such as Figure 2 As shown, the airtight support 2 includes two parallel and spaced crossbars 21, and two cross plates 22 for connecting the two crossbars 21 at the same end along their length.

[0029] Specifically, such as Figure 1 and Figure 3 As shown, a locking block 311 is detachably installed on the bottom of the base plate 31. The locking block 311 has a convex structure. When locking the clamp module 3, the side walls of the recessed platforms at both ends of the locking block 311 are tightly fitted with the crossbar 21 so that the clamp module 3 and the airtight support 2 cannot move relative to each other. This allows the position of the clamp module 3 to be freely adjusted and locked to accommodate stove pipes of different lengths.

[0030] Specifically, such as Figure 2 and Figure 3 As shown, a base 4 is provided above the horizontal plate 22. The base 4 is connected to the water tank 1. A lifting cylinder 5 is vertically installed on the base 4. The moving end of the lifting cylinder 5 passes through the base 4 and is connected to the horizontal plate 22 through a second connecting seat 6, thereby realizing the raising and lowering of the airtight support 2.

[0031] Specifically, such as Figures 4-6As shown, the upper mold 34 of the fixture is driven to move by a clamping cylinder 7, and the upper mold 34 is detachably connected to the moving end of the clamping cylinder 7. The clamping cylinders 7 are all mounted on a top plate located above the fixture mold base 32. In this embodiment, the upper mold 34 is connected to the moving end of the clamping cylinder 7 by screws. The upper mold 34 and lower mold 33 of the fixture are provided in various configurations to accommodate stove pipes of different diameters. When performing airtightness testing on stove pipes of different diameters, this can be achieved by replacing the upper mold 34 and lower mold 33 of the fixture with the corresponding dimensions, which also facilitates the maintenance and upkeep of the upper mold 34 and lower mold 33.

[0032] Specifically, such as Figures 4-6 As shown, the outer side of the air intake connector 37 is provided with a mounting plate 8. The mounting plate 8 is used to install the push cylinder 9. The moving end of the push cylinder 9 passes through the mounting plate 8 and is coaxially connected to the air intake connector 37.

[0033] Specifically, such as Figure 5 As shown, a first positioning keyway 81 is formed on the bottom of the mounting plate 8 along the width direction of the airtight bracket 2, and a second positioning keyway 312 is formed on the top surface of the base plate 31 along the width direction of the airtight bracket 2. The first positioning keyway 81 and the second positioning keyway 312 have the same structure, and the first positioning keyway 81 is used to mate with the second positioning keyway 312. When installing the mounting plate 8, the mounting position of the mounting plate 8 is positioned by aligning the first positioning keyway 81 and the second positioning keyway 312, so as to improve the assembly accuracy when the mounting plate 8 is connected to the base plate 31, simplify the disassembly and replacement of parts, and improve maintenance efficiency. At the same time, corresponding keys can be installed in the first positioning keyway 81 and the second positioning keyway 312 to improve the connection strength between the mounting plate 8 and the base plate 31.

[0034] Specifically, such as Figure 5 As shown, a third positioning keyway 321 is formed on the bottom of the fixture mold base 32 along the width direction of the airtight support 2, and a fourth positioning keyway 313 is formed on the top surface of the base plate 31 along the width direction of the airtight support 2. The third positioning keyway 321 and the fourth positioning keyway 313 have the same structure, and the third positioning keyway 321 is used to mate with the fourth positioning keyway 313. When installing the fixture mold base 32, the installation position of the fixture mold base 32 is positioned by aligning the third positioning keyway 321 and the fourth positioning keyway 313, so as to improve the assembly accuracy when the fixture mold base 32 is connected to the base plate 31, simplify the disassembly and replacement of parts, and improve maintenance efficiency. At the same time, corresponding keys may be installed in the third positioning keyway 321 and the fourth positioning keyway 313 to improve the connection strength between the fixture mold base 32 and the base plate 31.

[0035] Specifically, such as Figure 4 , Figure 6 as well as Figure 7As shown, a first connecting post 361 extends coaxially outward from the outer end of the first connecting seat 36. The outer wall of the first connecting post 361 is provided with an external thread. The end of the first connecting post 361 extends into the inner cavity of the air inlet connector 37 through the threaded engagement to complete the sealing of the connection between the air inlet connector 37 and the first connecting seat 36. This prevents water or air from entering the stove pipe body through the gap at the connection between the air inlet connector 37 and the first connecting seat 36 when the clamp module 3 is immersed in water, and then through the air outlet 38, thus affecting the air tightness test results. A second connecting post 362 extends coaxially inward from the inner end of the first connecting seat 36. The second connecting post 362 is cylindrical, and a sealing boss is coaxially provided at the end of the second connecting post 362. The end of the second connecting post 362 is squeezed into the inner cavity of the airtight rubber pad 35 to complete the sealing of the connection between the first connecting seat 36 and the airtight rubber pad 35. This prevents water or air from entering the stove pipe body through the gap at the connection between the first connecting seat 36 and the airtight rubber pad 35 when the clamp module 3 is immersed in water, and then through the air outlet 38, which would affect the airtightness test results. A flow hole is coaxially opened at the center of both the first connecting post 361 and the second connecting post 362. The flow hole is used to connect the inner cavity of the air inlet connector 37 and the inner cavity of the airtight rubber pad 35.

[0036] When conducting airtightness testing on the cooktop pipe, the internal pressure of the air inlet connector 37, the pressure of the lifting cylinder 5, the pressure of the clamping cylinder 7, and the pressure of the pushing cylinder 9 are adjusted by separate pressure reducing valves to meet the needs of different airtightness process requirements.

[0037] In application, the above description is only a preferred embodiment of this application and is not intended to limit this application. Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application.

Claims

1. A stove pipe airtightness testing machine, comprising a water tank (1), characterized in that, An airtight support (2) is provided vertically inside the water tank (1), and a pair of clamp modules (3) are provided on the airtight support (2) symmetrically and relatively moving along its length. The fixture module (3) includes a base plate (31), and multiple fixture mold seats (32) are provided at intervals on its inner side for inserting the lower fixture mold (33). The upper fixture mold (34) is provided above the lower fixture mold (33) and the upper fixture mold (34) is vertically movable. Multiple airtight rubber pads (35) are provided at intervals on the outer side of the base plate (31) and are arranged parallel to the length direction of the airtight support (2). The airtight rubber pads (35) correspond one-to-one with the fixture mold base (32), and the axis of the airtight rubber pads (35) is collinear with the axis of the cavity of the corresponding fixture lower mold (33). The outer side of the airtight rubber pads (35) is coaxially connected to the first connecting seat (36), and the outer side of the first connecting seat (36) is coaxially connected to the air inlet connector (37). The air inlet connector (37), the first connecting seat (36), and the airtight rubber pads (35) are sequentially connected. The inner end of the airtight rubber pads (35) is coaxially connected to the air outlet (38). The diameter of the airtight rubber pads (35) is larger than the outer diameter of the stove pipe, and the diameter of the air outlet (38) is smaller than the inner diameter of the stove pipe. The outer wall of the air inlet connector (37) is connected to the air inlet (39).

2. The gas tightness testing machine for stove pipes according to claim 1, characterized in that, The airtight support (2) includes two parallel and spaced crossbars (21) and two cross plates (22) for connecting the two crossbars (21) at the same end along their length.

3. The gas tightness testing machine for stove pipes according to claim 2, characterized in that, A locking block (311) is detachably installed on the bottom of the base plate (31). The locking block (311) has a convex structure. The locking block (311) is used to fit the side walls of the recessed platform at both ends of the locking fixture module (3) with the crossbar (21) so that the fixture module (3) and the airtight support (2) cannot move relative to each other.

4. The gas tightness testing machine for stove pipes according to claim 2, characterized in that, A base (4) is provided above the horizontal plate (22). The base (4) is connected to the water tank (1). A lifting cylinder (5) is vertically installed on the base (4). The moving end of the lifting cylinder (5) passes through the base (4) and is connected to the horizontal plate (22) through a second connecting seat (6).

5. A stove pipe airtightness testing machine according to claim 1, characterized in that, The upper mold (34) of the clamp is driven to move by a clamping cylinder (7), and the upper mold (34) of the clamp is detachably connected to the moving end of the clamping cylinder (7). The upper mold (34) and the lower mold (33) of the clamp are provided with various types corresponding to stove pipes of different diameters.

6. A stove pipe airtightness testing machine according to claim 1, characterized in that, The outer side of the air intake connector (37) is provided with a mounting plate (8). The mounting plate (8) is used to install the push cylinder (9). The moving end of the push cylinder (9) passes through the mounting plate (8) and is coaxially connected with the air intake connector (37).

7. A stove pipe airtightness testing machine according to claim 6, characterized in that, The bottom of the mounting plate (8) is provided with a first positioning keyway (81) along the width direction of the airtight bracket (2), and the top surface of the base plate (31) is provided with a second positioning keyway (312) along the width direction of the airtight bracket (2). The first positioning keyway (81) and the second positioning keyway (312) have the same structure, and the first positioning keyway (81) is used to cooperate with the second positioning keyway (312).

8. A stove pipe airtightness testing machine according to claim 1, characterized in that, The bottom of the fixture mold base (32) is provided with a third positioning keyway (321) along the width direction of the airtight support (2), and the top surface of the base plate (31) is provided with a fourth positioning keyway (313) along the width direction of the airtight support (2). The third positioning keyway (321) and the fourth positioning keyway (313) have the same structure, and the third positioning keyway (321) is used to cooperate with the fourth positioning keyway (313).

9. A stove pipe airtightness testing machine according to claim 1, characterized in that, The outer end of the first connector (36) extends outward coaxially to form a first connecting post (361). The outer wall of the first connecting post (361) is provided with an external thread. The end of the first connecting post (361) extends into the inner cavity of the air intake connector (37) through a threaded engagement. The inner end of the first connector (36) extends inward coaxially to form a second connecting post (362). The second connecting post (362) is a cylinder. The end of the second connecting post (362) is provided with a sealing boss coaxially. The end of the second connecting post (362) is squeezed into the inner cavity of the airtight rubber pad (35). The center of both the first connecting post (361) and the second connecting post (362) is provided with a flow hole coaxially. The flow hole is used to connect the inner cavity of the air intake connector (37) and the inner cavity of the airtight rubber pad (35).

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