Air tightness detection device for welded piston rod

Abstract

The utility model discloses a welding piston rod air tightness detection device, comprising a water tank, the top of which is provided with an opening, and the water tank is filled with water; the air cylinder is fixedly arranged above the water tank; the inflation nozzle is tubular, and one end of the inflation nozzle is coaxially and fixedly connected to a piston rod of the air cylinder; wherein the inflating nozzle is connected with an air pipe, and the air pipe is used for introducing compressed air into the inflating nozzle; the piston rod fixing seat is fixedly mounted at the bottom of the water tank, and the position of the piston rod fixing seat corresponds to the position of the charging connector; wherein the welding end of a piston rod to be tested is mounted on the piston rod fixing seat, the welding part of the piston rod to be tested is immersed in water in the water tank, and the piston rod to be tested and the charging connector are coaxially arranged; when the piston rod of the cylinder extends out, the other end of the charging connector can be communicated with the other end of the piston rod to be tested.

Description

TECHNICAL FIELD

[0001] The utility model belongs to piston rod airtightness detection technical field, especially related to a welding piston rod airtightness detection device. BACKGROUND

[0002] Piston rod welding airtightness detection is the important link of ensuring the piston rod sealing, if piston rod structure exists airtightness problem, will cause the influence to the performance of piston rod. The airtightness of welding piston rod is not good and is mainly caused by the bad welding effect of welding position, therefore, through the welding effect detection of piston rod welding position, the airtightness of piston rod can be detected.

[0003] The existing welding seam detection equipment often has the problems of large space occupation, complex operation and high technical requirements for users. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of welding piston rod airtightness detection devices, it is small in space occupation, easy to operate, and can realize the rapid detection of piston rod welding airtightness.

[0005] The technical scheme provided by the utility model is as follows:

[0006] A kind of welding piston rod airtightness detection device, comprising:

[0007] Water tank, its top is opened, water is contained in the water tank;

[0008] Air cylinder, it is fixedly arranged on the water tank upper side;

[0009] Inflator, it is tubular, one end of the inflator is coaxially fixedly connected on the piston rod of the air cylinder;

[0010] Among them, the inflator is connected with air pipe, for the compressed gas into the inflator;

[0011] Piston rod fixing seat, it is fixedly installed on the bottom of the water tank, and the position of the piston rod fixing seat corresponds with the position of the inflator;

[0012] Among them, the welding end of the piston rod to be measured is installed on the piston rod fixing seat, the welding position of the piston rod to be measured is immersed in the water in the water tank, and the piston rod to be measured is coaxially arranged with the inflator;

[0013] When the piston rod of the air cylinder is stretched out, the other end of the inflator can be communicated with the other end of the piston rod to be measured.

[0014] Preferably, the welding piston rod airtightness detection device further comprises:

[0015] Support frame, comprising:

[0016] A plurality of columns, the lower end is fixedly arranged in the water tank, and is arranged perpendicularly to the water tank bottom plate;

[0017] Cylinder mounting plate, fixedly connected at the upper end of the plurality of columns;

[0018] Wherein, the cylinder is fixedly installed on the cylinder mounting plate.

[0019] Preferably, the column is 4, and is arranged around the piston rod fixing seat.

[0020] Preferably, the welding piston rod airtightness detection device further comprises:

[0021] Positioning plate, fixedly installed on the column, and the positioning plate is located between the inflation nozzle and the water tank;

[0022] Wherein, one side of the positioning plate is provided with a groove, and the to-be-tested piston rod is matched and clamped in the groove.

[0023] Preferably, the support frame further comprises:

[0024] Fixed seat mounting plate, fixedly connected at the lower end of the column, and arranged in parallel opposite to the cylinder mounting plate;

[0025] Wherein, the piston rod fixing seat is fixedly arranged on the fixed seat mounting plate.

[0026] Preferably, the piston rod fixing seat is cylindrical, and is coaxially arranged with the inflation nozzle; the top of the piston rod fixing seat is provided with a piston rod mounting groove; the welding end of the to-be-tested piston rod is matched and inserted into the to-be-tested piston rod mounting groove.

[0027] Preferably, both ends of the positioning plate are respectively installed on two columns, and the column is provided with a thread, and the positioning plate is fixed by a locking nut installed on the column.

[0028] Preferably, the piston rod of the cylinder has an external thread, and the inflation nozzle is connected on the piston rod of the cylinder through the thread.

[0029] The welding piston rod airtightness detection device has the advantages of small space occupation, convenient operation, and can realize rapid detection of the airtightness of the piston rod.

[0030] The welding piston rod airtightness detection device provided by the utility model has the advantages of small space occupation, convenient operation, and can realize rapid detection of the airtightness of the piston rod. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1The overall structure schematic diagram of the welding piston rod air tightness detection device is shown in the utility model.

[0032] Figure 2 The overall structure schematic diagram of the support frame is shown in the utility model.

[0033] Figure 3 The structure schematic diagram of the piston rod fixing seat is shown in the utility model.

[0034] Figure 4 The sectional view of the piston rod to be detected is shown in the utility model. DETAILED DESCRIPTION

[0035] The utility model will be further explained in detail in combination with the drawings, so that the person skilled in the art can implement according to the description.

[0036] As Figures 1-4 The utility model provides a kind of welding piston rod air tightness detection device, it includes: water tank 110, cylinder 120, inflation nozzle 130, piston rod fixing seat 140 and support frame 150.

[0037] Water tank 110 top is opened, and water is contained in water tank 110. Cylinder 120 is fixedly arranged above water tank 110 by support frame 150, and the piston rod of cylinder 120 is arranged perpendicular to the bottom plate of water tank 110.

[0038] Inflation nozzle 130 is circular tubular, and one end of inflation nozzle 130 is coaxially fixedly connected on the piston rod of cylinder 120. Among them, the sidewall of inflation nozzle 130 is connected with air pipe 131, for passing into compressed gas into inflation nozzle 130.

[0039] In the embodiment, the piston rod of cylinder 120 has external thread, and inflation nozzle 130 is connected on the piston rod of cylinder 120 by thread.

[0040] Piston rod fixing seat 140 is fixedly installed at the bottom of water tank 110, and the position of piston rod fixing seat 140 corresponds with the position of inflation nozzle 130. Among them, the welding end of piston rod to be detected 200 is installed on piston rod fixing seat 140, so that the welding part 210 of piston rod to be detected 200 is immersed in water in water tank 110, and piston rod to be detected 200 is coaxially arranged with inflation nozzle 130.

[0041] When the piston rod of cylinder 120 is stretched out, the other end of inflation nozzle 130 can be abutted on the other end of piston rod to be detected 200, and inflation nozzle 130 is communicated with piston rod to be detected 200.

[0042] Since the welding position 210 of the to-be-tested piston rod 200 is immersed in the water in the water tank 110, the compressed gas is introduced into the inflation nozzle 130 through the air pipe 131, and the gas can enter the hollow to-be-tested piston rod 200, and whether the welding position 210 of the to-be-tested piston rod 200 produces bubbles is observed. If bubbles are produced, it indicates that the welding position 210 has defects such as pinholes and sand inclusions, and the air tightness is poor; if no bubbles are produced, it indicates that the to-be-tested piston rod has qualified air tightness.

[0043] As a preferred, the support frame 150 comprises: a plurality of columns 151 and a cylinder mounting plate 152. The lower end of the plurality of columns 151 is fixedly arranged in the water tank 110, and the column 151 is arranged perpendicular to the bottom plate of the water tank 110. The cylinder mounting plate 152 is fixedly connected to the upper end of the plurality of columns 151 at the same time, and the cylinder mounting plate 152 is arranged parallel to the bottom plate of the water tank 110, that is, the cylinder mounting plate 152 is arranged horizontally. The cylinder 120 is fixedly installed on the cylinder mounting plate 152.

[0044] In the embodiment, the column 151 is 4, and is arranged around the piston rod fixing seat 140. The cylinder mounting plate 152 is a rectangular plate, and the four columns 151 are arranged close to the four corners of the cylinder mounting plate 152 respectively.

[0045] As a preferred, the piston rod fixing seat 140 is cylindrical and coaxially arranged with the inflation nozzle 130; the top of the piston rod fixing seat 140 is provided with a piston rod mounting groove 141 matched with the size of the welding end of the to-be-tested piston rod 200; the welding end of the to-be-tested piston rod 200 is matched and inserted into the to-be-tested piston rod mounting groove 141, so that the fixation of the to-be-tested piston rod 200 is realized. The structure of the piston rod fixing seat 140 facilitates the installation of the to-be-tested piston rod 200 and is convenient to use.

[0046] As a preferred, the welding piston rod air tightness detection device further comprises a positioning plate 160 fixedly installed on the column 151, and the positioning plate 160 is located between the inflation nozzle 130 and the water tank 110 in the vertical direction. Wherein, one side of the positioning plate 160 is provided with a groove 161, and the to-be-tested piston rod 200 is matched and clamped in the groove 161 to ensure the position stability of the positioning plate 160.

[0047] In the embodiment, the two ends of the positioning plate 160 are respectively installed on the two columns 151 on the diagonal line of the cylinder mounting plate 152, and the column 151 is provided with a thread, and the positioning plate 160 is fixed by the locking nut 151a installed on the column 151.

[0048] As a further preferred, the support frame 150 further comprises a fixed seat mounting plate 153 fixedly connected at the lower end of the column 151, the fixed seat mounting plate 153 is arranged in parallel opposite to the cylinder mounting plate 152. Wherein, the piston rod fixed seat 140 is fixedly arranged on the fixed seat mounting plate 152. The plurality of columns 151, the cylinder mounting plate 152 and the fixed seat mounting plate 153 constitute a support frame 150 which can be independent of the sink 110. The cylinder 120 and the piston rod fixed seat 140 are both mounted on the support frame 150. The support frame 150 can be put into the sink 110 as a whole for use, or taken out of the sink 110 as a whole. This structure is more convenient for welding the piston rod airtightness detection device.

[0049] When detecting, the lower end of the piston rod 200 to be detected is mounted on the piston rod fixed seat 140, so that the welding position 210 of the piston rod 200 to be detected is immersed in water. The piston rod of the cylinder 120 is extended, so that the lower end of the inflation nozzle 130 abuts against the upper end of the piston rod 200 to be detected and communicates with the piston rod 200 to be detected, and the compressed gas is introduced into the inflation nozzle 130 through the air pipe 131, so that the piston rod 200 to be detected is filled with gas; whether the welding position 210 of the piston rod 200 to be detected has bubbles is observed, if there are bubbles, it indicates that the welding position 210 has pinhole sand inclusion and other defects, and the airtightness is not good; if there are no bubbles, it indicates that the piston rod to be detected is qualified in airtightness.

[0050] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, it can be fully applied to various fields suitable for the present application, and for those skilled in the art, other modifications can be easily realized, therefore, the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A device for detecting the gas tightness of a welded piston rod, characterized in that It comprises: a water tank with an open top, water being contained in the water tank; a cylinder fixedly arranged above the water tank; an air inlet pipe in a tubular shape, one end of the air inlet pipe being coaxially fixedly connected to a piston rod of the cylinder; wherein a gas pipe is connected to the air inlet pipe for passing compressed gas into the air inlet pipe; a piston rod fixing seat fixedly installed at the bottom of the water tank, the position of the piston rod fixing seat corresponding to the position of the air inlet pipe; wherein a welded end of a piston rod to be tested is installed on the piston rod fixing seat, the welded part of the piston rod to be tested being immersed in water in the water tank, and the piston rod to be tested being coaxially arranged with the air inlet pipe; when the piston rod of the cylinder is extended, the other end of the air inlet pipe is in communication with the other end of the piston rod to be tested.

2. The welded piston rod gas tightness testing device of claim 1, wherein, It further comprises: a support frame comprising: a plurality of columns, the lower ends of the columns being fixedly arranged in the water tank and being arranged perpendicularly to the bottom plate of the water tank; a cylinder mounting plate fixedly connected to the upper ends of the columns; wherein the cylinder is fixedly installed on the cylinder mounting plate.

3. The welded piston rod gas tightness testing apparatus of claim 2, wherein, The columns are four in number and are arranged around the piston rod fixing seat.

4. The welded piston rod gas tightness testing device according to claim 2 or 3, characterized in that It further comprises: a positioning plate fixedly installed on the columns and located between the air inlet pipe and the water tank; wherein one side of the positioning plate is provided with a recess, and the piston rod to be tested is matched and engaged in the recess.

5. The welded piston rod gas tightness testing device of claim 4, wherein, The support frame further comprises: a fixing seat mounting plate fixedly connected to the lower ends of the columns and being arranged in parallel and opposite to the cylinder mounting plate; wherein the piston rod fixing seat is fixedly arranged on the fixing seat mounting plate.

6. The welded piston rod gas tightness testing apparatus of claim 5, wherein, The piston rod fixing seat is in a cylindrical shape and is coaxially arranged with the air inlet pipe; the top of the piston rod fixing seat is provided with a piston rod mounting groove; and the welded end of the piston rod to be tested is matched and inserted into the piston rod mounting groove.

7. The welded piston rod gas tightness testing device of claim 6, wherein, Both ends of the positioning plate are respectively installed on two columns, and the columns are provided with threads, and the positioning plate is fixed by lock nuts installed on the columns.

8. The welded piston rod gas tightness testing device of claim 7, wherein, The piston rod of the cylinder has external threads, and the air inlet pipe is connected to the piston rod of the cylinder by threads.

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