CN110398327B - A PE saddle type bypass pipe fittings air tightness testing machine - Google Patents

Abstract

The invention discloses an air tightness testing machine for PE saddle type bypass pipe fittings, which comprises a frame, a test table is arranged on the frame, the test table is provided with at least one station, and the station is provided with a saddle to be tested. The saddle part of the type bypass pipe fitting is matched with the fixing seat, the positioning assembly for fixing the saddle type bypass pipe fitting to be tested, the sealing assembly for sealing the three ports of the saddle type bypass pipe fitting to be tested, and the positioning assembly includes the saddle type part A positioning structure and a tool tube positioning structure are provided, and the sealing component includes a nozzle sealing component, a tool tube port sealing component and a bypass pipe port sealing component. The invention has the advantages of reliable sealing, convenient operation by employees, matching different types of saddle-type bypass pipe fittings to be tested in a relatively simple method, and easy replacement of wearing parts.

Description

A PE saddle type bypass pipe fittings air tightness testing machine

technical field

The invention belongs to the technical field of air tightness testing of PE saddle-type bypass pipe fittings, and in particular relates to an air-tightness testing machine for PE saddle-type bypass pipe fittings.

Background technique

At present, the PE saddle type bypass fitting is a kind of conversion connection used in the gas pipeline, which is mainly used to connect the bypass branch on a complete PE pipeline. The PE saddle type bypass fitting includes a saddle part and a tool tube. The tool tube is also provided with a bypass tube perpendicular to the tool tube. The intersection of the tool tube and the saddle part forms a nozzle. The saddle part of the saddle is welded to the pipe wall of the original pipeline by electrofusion, and then the original pipe wall is destroyed by the tool that comes with the saddle bypass pipe fitting, so that the gas in the pipe flows smoothly into the bypass pipe. Since the self-contained tool in the saddle bypass fitting is a movable part, the whole process of connecting the gas pipeline to the bypass branch of the saddle bypass fitting is not closed when the original gas pipeline is not closed, that is, the gas pipeline is filled with gas. It is carried out in the presence of a large amount of flammable gas, so the air tightness of the part where the tool is located is very important for the safety of the operation of the entire saddle bypass fitting connected to the gas line.

At present, the air tightness test standard for saddle-type bypass fittings alone is still blank. Referring to the air tightness test of PE gas valve, the traditional test method is to use the water test method, using simple mechanical devices and sealing gaskets. Manually seal both ends of the saddle bypass fittings, immerse the saddle bypass fittings in water, and fill a certain amount of gas into the saddle bypass fittings to increase the pressure in the saddle bypass fittings. Observe the water with the naked eye. Air bubbles to determine if there is a leak.

There are the following problems in traditional testing methods: 1. It is easy to misjudge and miss the judgment by naked eye observation and judgment; 2. The depth of water entry has an influence on the formation of bubbles, which is not conducive to the judgment of micro-leakage; 3. The inflation pressure is generally uncontrollable and only depends on the air source pressure; ④ There is no record in the test process, and follow-up tracking and process improvement cannot be carried out; ⑤ It relies heavily on manpower and is inefficient; are very difficult.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the present invention provides a PE saddle-type bypass pipe fittings air tightness testing machine. The testing machine adopts multi-station parallel testing to improve testing efficiency, and it can be applied by changing the fixed seat. Saddle-type bypass fittings of different sizes and radians are used for sealing tests, and the sealing mechanism has the advantages of convenient installation and removal and good sealing performance.

In order to achieve the above purpose, the technical solution adopted in the present invention is: a PE saddle-type bypass pipe fitting air tightness testing machine, comprising a frame, and a test bench is arranged on the frame, characterized in that: the test bench is provided with at least one tool This station is provided with a fixed seat matching the saddle-shaped part of the saddle-type bypass pipe to be tested, a positioning assembly for fixing the saddle-type bypass pipe to be tested, and a third seat for sealing the saddle-type bypass pipe to be tested. A sealing assembly for a port, the positioning assembly includes a saddle portion positioning structure and a tool tube positioning structure, and the sealing assembly includes a nozzle sealing assembly, a tool tube port sealing assembly and a bypass tube port sealing assembly.

In the above structure, two or more groups of workstations can be arranged in parallel on the test bench for testing at the same time. The fixed seat has a saddle shape that matches the shape of the saddle part. They are sealed separately, and are fixed and pressed horizontally and vertically through the saddle-shaped part positioning structure and the tool tube positioning structure, so that the three ports are tightly sealed.

Further, the fixing seat includes a saddle-shaped base adapted to the saddle-shaped part of the saddle-shaped bypass pipe, a sealing groove is provided at the corresponding position of the saddle-shaped base and the nozzle, and the nozzle sealing assembly includes a sealing groove arranged in the sealing groove. The nozzle sealing ring is in sealing contact between the nozzle and the saddle base through the nozzle sealing ring.

In the above structure, the saddle-shaped part of the saddle-shaped bypass pipe to be tested is placed on the saddle-shaped base, the corresponding part of the saddle-shaped base and the nozzle forms a sealing contact with the nozzle through the nozzle sealing ring, and the saddle-shaped base corresponds to the nozzle. Preferably, inner and outer sealing grooves are provided, and inner and outer sealing rings are respectively matched for matching, and the sealing rings are deformed under the extrusion of the saddle-shaped part positioning structure to seal the nozzle.

Further, the tool tube port sealing assembly includes a tool tube port sealing end cap, and a tool tube port power mechanism for driving the tool tube port sealing end cap to move toward or away from the tool tube port.

In the above structure, the sealing end cover of the tool tube port includes a sealing ring integrated plate, and the sealing ring integrated plate is provided with a central sealing structure, a middle annular sealing structure, and an outer annular sealing structure. It is installed on the front of the sealing ring fixing plate, and the back of the sealing ring fixing plate is connected to the power cylinder of the tool tube port. The power cylinder of the tool tube port is installed on the frame. There are also optical axis guide rods on both sides for guidance.

Further, the bypass port sealing assembly includes a bypass port sealing end cap, and a bypass port power mechanism for driving the bypass port sealing end cap to move toward or away from the bypass port.

In the above structure, the sealing end cap of the bypass port includes a silicone sealing plate, and a silicone fixing ring is arranged on the outer side of the silicone sealing plate, which is fixedly installed on the workpiece sealing plate through the silicone fixing ring, and the back of the workpiece sealing plate is connected to drive the bypass pipe port. The bypass port power cylinder moves back and forth at the sealing end. The left and right sides of the workpiece sealing plate are extended with ears, and the ears on both sides are respectively connected with guiding optical shafts. The bypass port power cylinder is fixedly installed on the cylinder plate, on both sides of the cylinder plate. In combination with the guide rods, the power cylinder of the bypass port can be moved up and down to adjust the position of the sealing end cover of the bypass port to adapt to different saddle-type bypass pipe fittings to be tested. The guide optical axis is matched, and there are 2 linear sliders on each side, which are distributed up and down, and the lifting movement is more stable.

Further, the saddle-shaped part positioning structure includes a buckle component, the buckle component is located on the side of the fixed seat, and the buckle component and the test bench form a horizontal sliding fit that can move toward or away from the fixed seat. It includes a hook and a power mechanism for driving the hook to move up and down.

In the above structure, the buckle assembly can slide horizontally in the direction of the saddle-type bypass pipe fitting. After the horizontal sliding is in place, the side of the saddle-type bypass pipe fitting can be positioned in the horizontal direction, and then the buckle assembly is driven by the cylinder to move down. The saddle-shaped part is buckled through the bayonet of the hook to achieve vertical positioning and pressure, so that the purpose of sealing the special-shaped nozzle of the saddle-shaped bypass pipe is achieved after the sealing ring is deformed.

Further, the bayonet is arranged on a side wall of the hook facing the fixing seat, and the upper end face of the bayonet is provided with a limit groove which is matched with the positioning convex point of the saddle part.

In the above structure, the bayonet of the hook faces the direction of the fixed seat, that is, the direction of the saddle part.

Further, the test table is provided with a sliding guide rail, a sliding block is installed on the sliding guide rail, the sliding block is fixedly connected with the buckle assembly, and the buckle assembly forms a horizontal sliding fit with the test table along the axial direction of the guide rail.

In the above structure, the buckle assembly is installed on the slider, the slider is sleeved on the left and right ends of the sliding guide rail, and the sliding of the slider and the sliding guide rail makes the left and right back and forth movement of the buckle assembly more stable.

Further, the tool tube positioning structure includes two guide columns installed on the test bench, which are an installation guide column and a limit guide column, respectively. The two guide columns are located on the left and right sides of the fixed seat and at the front end of the tool tube. A positioning cross bar is arranged on the guide post, the positioning cross bar can move up and down along the installation guide post, and a lifting and positioning structure is arranged on the installation guide post.

In the above structure, the positioning cross bar is sleeved on the installation guide post and can move up and down linearly to adjust the corresponding position with the tool tube.

Further, there is a gap between the free end of the positioning cross bar and the limit guide post, the positioning cross bar is provided with a positioning groove that is adapted to the outer wall of the tool tube, and the free end of the positioning cross bar is hinged with a limit cross bolt to limit the position. The cross-bolt has at least two positions, the limit cross-bolt forms a limit structure with the limit guide post at the first position, and the limit cross-bolt is released from the limit of the limit cross-bolt and the limit guide post at the second position Cooperate.

In the above structure, the positioning crossbar is provided with an arc-shaped positioning groove matching the outer wall of the tool tube to strengthen the fixing effect, and the free end of the positioning crossbar is hinged to the limit crossbolt to realize the cooperation of the limit and the disengagement limit. flexible.

Further, a support block is installed on the positioning crossbar, the positioning groove is arranged on the side of the support block facing the tool tube, one end of the positioning crossbar is installed on the installation guide rail through a linear bearing, and the lifting and positioning structure includes a socket connection. A positioning sleeve on the installation guide rail, the positioning sleeve is located under the positioning cross bar, a positioning hole perpendicular to the axial direction of the positioning sleeve is arranged on the positioning sleeve, and a positioning fastener is matched with the positioning hole.

In the above structure, the positioning crossbar is provided with through holes, the support block is installed on the positioning crossbar through fasteners, the positioning crossbar can also be provided with multiple groups of through holes for adjusting the horizontal position, and the positioning crossbar is fixed to the positioning crossbar through the positioning sleeve. On the installation guide rod, the outer peripheral surface of the positioning sleeve is provided with a radially extending positioning hole, and the positioning fastener passes through the positioning hole and abuts on the installation guide rod, thereby forming vertical positioning.

By adopting the above scheme, the testing machine of the present invention is designed for the special shape of the saddle-type bypass pipe in terms of the sealing method. The extrusion force is applied in the vertical and horizontal directions for the nozzles in three directions, and the flexible material of the sealing end cap passes through the The deformation seals the nozzle, the sealing is fast, and most of the time for manual sealing and manual operation is saved, and the testing machine can be set up with multiple stations to work in parallel, which is easy for workers to operate, and greatly saves manpower and time. By means of pressure sensor monitoring, the test pressure can be accurately controlled, and continuous testing of various pressures is supported, which can better test the sealing performance of the saddle bypass pipe under test under different pressures, and the test records under each pressure can be Detailed records are carried out by the equipment, which can better conduct comprehensive judgment and quality retrospective.

The present invention will be further described below in conjunction with the accompanying drawings.

Description of drawings

1 is a schematic diagram of the appearance structure of a specific embodiment of the present invention;

2 is a schematic diagram of the assembly structure of a saddle-type bypass pipe fitting and a sealing mechanism with parallel double stations according to a specific embodiment of the present invention;

3 is a side view of the assembly structure of a saddle-type bypass pipe and a sealing mechanism according to a specific embodiment of the present invention;

4 is a schematic structural diagram of the rear view state of the assembly structure of the saddle-type bypass pipe fitting and the sealing mechanism according to the specific embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a fixing seat according to a specific embodiment of the present invention;

6 is a schematic diagram of the installation structure of the sealing end cover of the tool tube port and the power cylinder of the tool tube port according to the specific embodiment of the present invention;

Fig. 7 is another structural schematic diagram of Fig. 6 of the specific embodiment of the present invention;

8 is a schematic diagram of the installation structure of the fixing seat, the test table and the positioning structure of the tool tube according to the specific embodiment of the present invention;

9 is a schematic structural diagram of a saddle-type bypass pipe to be tested according to a specific embodiment of the present invention;

Rack 1, test bench 11, fixed seat 12, saddle base 121, nozzle sealing end cap 122, tool tube port sealing end cap 13, sealing ring integrated plate 131, sealing ring fixing plate 132, tool tube port power cylinder 133 , optical axis guide rod 134, bypass port sealing end cover 14, silicone sealing plate 141, silicone fixing ring 142, workpiece sealing plate 143, ear 143a, bypass port power cylinder 144, guide optical axis 145, cylinder plate 146, guide rod 147, linear slider 148,

Buckle assembly 2, hook 21, bayonet 211, limit slot 212, sliding guide 22, slider 23,

Installation guide post 31, limit guide post 32, positioning cross bar 41, limit cross bolt 42, support block 43, linear bearing 51, positioning sleeve 52,

Saddle-shaped bypass pipe 6 , saddle-shaped part 61 , positioning bump 611 , tool tube 62 , nozzle 63 .

Detailed ways

A specific embodiment of the present invention is shown in Figures 1-8, which is a PE saddle-type bypass pipe fittings air tightness testing machine, including a frame 1, a test table 11 is arranged on the frame 1, and the test table 11 is provided with two stations: left and right , the test bench 11 can be set up in parallel with two or more sets of workstations for testing at the same time, and the workstations are provided with a fixed seat 12 that matches the saddle part 61 of the saddle bypass pipe fitting 6 to be tested. The positioning assembly of the bypass pipe fitting 6, the sealing assembly used to seal the three ports of the saddle-type bypass pipe fitting 6 to be tested, the positioning assembly includes a saddle part positioning structure and a tool tube positioning structure, and the sealing assembly includes a nozzle sealing assembly, a tool tube 62 Port Seal Assembly and Bypass Port Seal Assembly. The fixed seat 12 has a saddle shape that matches the shape of the saddle part 61. After the saddle-shaped bypass pipe 6 is placed on the fixed seat 12, its three ports are sealed respectively, and the positioning structure of the saddle part and the positioning structure of the tool tube are carried out. The fixed compression in the horizontal and vertical directions makes the three ports tightly sealed.

The above-mentioned fixed seat 12 includes a saddle base 121 adapted to the saddle portion 61 of the saddle bypass pipe 6 (as shown in FIG. 9 ). The saddle base 121 is provided with a sealing groove corresponding to the nozzle 63, and the nozzle is sealed. The assembly includes a nozzle sealing ring arranged in the sealing groove, the nozzle and the saddle base 121 are in sealing contact through the nozzle sealing ring, and the upper end surface of the saddle base 121 cooperates with the nozzle sealing ring to form a nozzle sealing end cover 122, the nozzle sealing end cover 122 has an inner ring sealing structure and an outer ring sealing structure, which are formed by the inner and outer sealing grooves with the inner and outer sealing rings, and the nozzle sealing end cover 122 is squeezed in the saddle part positioning structure. The flexible deformation occurs when the nozzle is pressed down, so that the nozzle 63 is sealed, and the inner and outer sealing ring structures can be integrally formed on the saddle base 121 or separately provided.

The tool tube 62 port sealing assembly includes the tool tube 62 port sealing end cap 13, and the tool tube 62 port sealing end cap 13 that drives the tool tube 62 port sealing end cap 13 to move toward or away from the tool tube 62 port. Power cylinder 133, the tool tube 62 port sealing end The cover 13 includes a sealing ring integrated plate 131. The sealing ring integrated plate 131 is provided with a central sealing structure, a middle annular sealing structure, and an outer annular sealing structure. The triple sealing structures are separated by annular grooves, and the integrated plate is installed on the sealing ring fixing plate. The front of 132, the back of the sealing ring fixing plate 132 is connected to the power cylinder 133 of the 62 port of the tool tube. The power cylinder 133 of the 62 port of the tool tube is installed on the frame 1. In order to stabilize the up and down movement of the power cylinder 133 of the 62 port of the tool tube, the sealing ring is fixed. The left and right sides of the back of the plate 132 are also provided with optical axis guide rods 134 for guiding.

The bypass port seal assembly includes the bypass port seal end cap 14, and the bypass port power cylinder 144 that drives the bypass port seal end cap 14 toward or away from the bypass port, the bypass port seal end The cover 14 includes a silica gel sealing plate 141, and a silica gel fixing ring 142 is arranged on the outer side of the silica gel sealing plate 141, which is fixedly installed on the workpiece sealing plate 143 through the silica gel fixing ring 142. The movable bypass port power cylinder 144, the left and right sides of the workpiece sealing plate 143 are extended with ear portions 143a, and the two side ears 143a are respectively connected with guiding optical shafts 145, the bypass port port power cylinder 144 is fixedly mounted on the cylinder plate 146, The two sides of the cylinder plate 146 cooperate with the guide rods 147 to drive the bypass port power cylinder 144 to move up and down to adjust the position of the bypass port seal end cover 14 to adapt to different saddle-type bypass pipe fittings to be tested. 6, the cylinder The two sides of the plate 146 are respectively matched with the guiding optical axis 145 through the linear sliders 148. The lower part of the cylinder plate 146 is also connected with the output shaft of the motor through the connecting block. The motor drives the cylinder plate to move up and down, and there are two linear sliders 148 on each side. Distributed up and down, the lifting movement is more stable.

The positioning structure of the saddle part includes a buckle assembly 2, and the buckle assembly 2 includes a buckle hook 21 and a power mechanism for driving the buckle hook 21 to move up and down. 211 is arranged on a side wall of the hook 21 facing the fixing seat 12, the upper end surface of the bayonet 211 is provided with a limit groove 212 which is matched with the positioning convex point 611 of the saddle part 61, and the upper end surface of the bayonet 211 passes through the limit groove 212. The positioning protrusions 611 on the upper end surface of the saddle-shaped part 61 form a snap-fit positioning, and the positioning and matching are more reliable. The buckle assembly 2 is located on the side of the fixed seat 12. Preferably, there are buckle assemblies 2 on the left and right sides of the fixed seat 12 to fix and press both sides of the saddle part 61. Horizontal slip fit in the direction close to or away from the fixing seat 12 (ie, the direction of the saddle bypass pipe 6). The test table 11 is provided with a sliding guide rail 22, on which a sliding block 23 is installed. The sliding block 23 is fixedly connected with the buckle assembly 2, and the buckle assembly 2 forms a horizontal sliding movement with the test table 11 along the axial direction of the guide rail. In cooperation, the buckle assembly 2 is installed on the slider 23, and the slider 23 is sleeved on the left and right ends of the sliding guide rail 22. The sliding of the slider 23 and the sliding guide rail 22 makes the left and right back and forth movement of the buckle assembly 2 more stable. After the horizontal sliding is in place, the lateral side of the saddle-type bypass pipe fitting 6 is positioned in the horizontal direction, and then the clamping assembly 2 is driven down by the cylinder, and the saddle-shaped part 61 is buckled through the bayonet 211 of the clamping hook 21, and the It realizes positioning and pressure in the vertical direction, so that the sealing ring on the nozzle sealing end cover 122 is deformed to achieve the purpose of sealing the special-shaped nozzle of the saddle-type bypass pipe 6 .

The tool tube positioning structure includes two guide columns installed on the test bench 11, namely the installation guide column 31 and the limit guide column 32. The two guide columns are located on the left and right sides of the fixed seat 12 and at the front end of the tool tube 62, respectively. There is a positioning cross bar 41 on the guide post 31, the positioning cross bar 41 can move up and down along the installation guide post 31, and the installation guide post 31 is provided with a lifting and positioning structure. The positioning cross bar 41 and the limit guide post 32 form a circumferential rotation. The positioning cross bar 41 is sleeved on the installation guide post 31 and can move up and down linearly to adjust the corresponding position with the tool tube 62 , and the tool tube 62 is fixed by the positioning cross bar 41 abutting with the tool tube 62 . effect.

There is a gap between the free end of the positioning cross bar 41 and the limiting guide post 32. The positioning cross bar 41 is provided with a positioning groove adapted to the outer wall of the tool tube 62. The position cross bolt 42 has at least two positions, the limit cross bolt 42 forms a limit structure with the limit guide post 32 at the first position, and the limit cross bolt 42 is disengaged from the limit cross bolt 42 and the limiter at the second position. For the position-limiting cooperation of the positioning guide post 32, the positioning cross-bar 41 is provided with an arc-shaped positioning groove that matches the outer wall of the tool tube 62 to enhance the fixing effect, and the free end of the positioning cross-bar 41 is hinged through the limit cross-bolt 42 to achieve the limit With the cooperation of the release limit, it is more flexible.

A support block 43 is installed on the positioning cross bar 41, the positioning groove is arranged on the side of the support block 43 facing the tool tube 62, one end of the positioning cross bar 41 is installed on the installation guide rail through the linear bearing 51, and the lifting and positioning structure includes being sleeved on the installation guide rail. The positioning sleeve 52 is located below the positioning cross bar 41. The positioning sleeve 52 is provided with a positioning hole perpendicular to the axial direction of the positioning sleeve 52. The positioning hole is matched with a positioning fastener, and the positioning cross bar 41 is provided with Through holes, the support block 43 is installed on the positioning crossbar 41 through the positioning fasteners, the positioning crossbar 41 can also be provided with multiple groups of through holes for adjusting the horizontal position, and the positioning crossbar 41 is fixed on the installation guide rod through the positioning sleeve 52 The outer peripheral surface of the positioning sleeve 52 is provided with radially extending positioning holes, and the positioning fasteners pass through the positioning holes and abut on the installation guide rod, thereby forming vertical positioning.

During the test, different types of PE saddle-type bypass pipe fittings 6 have different radians and sizes of the saddle-type part 61, and the diameter and length of the bypass pipe and the tool pipe 62 are different. In the test, the testing machine of the present invention adopts the saddle-type base 121 suitable for the pipe fitting model at the saddle-type nozzle 63, and cooperates with the vertical cylinder to clamp to achieve sealing; for the bypass pipe port, the sealing end with flexible sealing material is used. The cover cooperates with the mechanical support structure to achieve sealing and fixing in the horizontal direction; the port of the tool tube 62 is sealed with a flexible sealing ring of the same size as its port.

When using the PE saddle-type bypass pipe fitting 6 air tightness testing machine of the present invention to test the air-tightness of the saddle-type bypass pipe fitting 6, it is necessary to connect the high-pressure gas source and power supply first, wherein the pressure of the gas source should be higher than the maximum test pressure , when the pressure is too high, the extrusion force of the sealing end cap is too large, and it can be adjusted by the intake filter pressure regulating valve. Before the test, it is necessary to install the sealing end cap and the horizontal support block 43 corresponding to the type 6 of the saddle bypass pipe to be tested to the designated position, and select the type 6 of the saddle bypass pipe to be tested so that the system can correctly adjust the horizontal sealing end. Cover height. The saddle-shaped part 61 of the saddle-shaped bypass pipe fitting 6 to be tested is directly placed on the saddle-shaped base 121. The saddle-shaped base 121 is provided with multiple sealing structures to form a saddle-shaped sealing end cap, ensuring that the center of the saddle-shaped sealing end cap and the saddle shape of the pipe fitting are The center holes of the part 61 are aligned, and the horizontal position of the buckle is adjusted so that it clamps the upper edge of the saddle part 61 . After that, the operator should buckle the upper limit cross bolt 42. The support block 43 on the limit cross bolt 42 is matched with the tool tube 62. After the limit cross bolt 42 is buckled, the support block 43 should be attached to the tool tube 62 ( There won't be a huge gap, but it won't be tight either). At this time, the operator presses the down button to lower the buckles on both sides of the saddle-type bypass pipe fitting 6, clamps the saddle-type bypass pipe fitting 6 to be tested, and confirms that the saddle-type bypass pipe fitting 6 to be tested is fixed in the correct position, then operate the The personnel adjust the appropriate test pressure and test time, and the preparation work is now completed. After the preparation work is completed, the operator starts the test. After the test starts, firstly press the sealing end cover of the bypass pipe port and the sealing end face of the 62 port of the tool pipe. Inflate the through-pipe 6, stop the inflation when the pressure in the saddle-type bypass pipe 6 to be tested reaches the preset air pressure, the testing machine will always monitor the air pressure at one end of the tool tube 62, if the air pressure at one end of the tool tube 62 exceeds the preset threshold, it will prompt a prompt The saddle-type bypass pipe fitting 6 to be tested is leaking, otherwise the saddle-type bypass pipe fitting 6 to be tested is normal. After the test, the sealing end cap of the tool tube 62 port and the sealing end cap of the bypass tube port will be automatically released. At this time, the operator needs to press the up button to release the buckle of the saddle mouth 63 and release the limit. Cross bolt 42, replace the saddle-type bypass pipe 6 to be tested and continue the test.

The present invention adopts the method of inflating the inside of the saddle-type bypass pipe piece 6 to be tested and monitoring the air pressure at the port of the tool pipe 62, which not only detects the air tightness of the saddle-type bypass pipe piece 6, but also avoids the adverse effect on the resistance wire caused by entering the water. ;Press and seal in the horizontal and vertical directions respectively, and use a special sealing end cover for the saddle type nozzle 63 to seal, and the air hole is set in the middle of the sealing end cover, which is used for inflating and deflating and monitoring the saddle type bypass pipe fitting 6 to be tested. Air pressure; the invention can more effectively detect the micro-leakage situation and eliminate artificial factors, and the use of multiple pressure tests can effectively avoid the problem that the micro-leakage pipe fittings are often missed under lower pressure, and the multi-station parallel test design saves a lot of money Manpower and time can effectively improve the economic benefits of the manufacturer. Moreover, the workpiece is easy to load and unload, and the position of the pipe under test can be guaranteed by placing it directly or with a simple mechanical buckle, and it has a good degree of coordination with the special shape of the saddle bypass pipe fitting 6. .

The present invention is not limited to the above-mentioned specific embodiments. Those skilled in the art can use other various specific embodiments to implement the present invention according to the content disclosed in the present invention, or use the design structure and idea of the present invention, and make simple changes or Modifications fall within the protection scope of the present invention.

Claims (7)

1. a PE saddle type bypass pipe fitting air tightness testing machine, comprising a frame, the frame is provided with a test bench, it is characterized in that: the test bench is provided with at least one station, and this station is provided with The saddle-type bypass pipe fitting has a saddle-shaped part matching fixing seat, a positioning assembly for fixing the saddle-type bypass pipe fitting to be tested, and a sealing assembly for sealing the three ports of the saddle-type bypass pipe fitting to be tested. The positioning assembly includes A saddle-shaped partial positioning structure and a tool tube positioning structure, the sealing components include a nozzle sealing component, a tool tube port sealing component and a bypass tube port sealing component; the saddle-shaped partial positioning structure includes a snap component, and the snap component is located in the On the side of the fixed seat, the buckle assembly and the test bench form a horizontal sliding fit that can move toward or away from the fixed seat. The buckle assembly includes a hook and a power mechanism that drives the hook to move up and down. The hook has a direction of The bayonet is arranged in the direction of the fixing seat; the bayonet is arranged on one side wall of the hook facing the fixing seat, and the upper end face of the bayonet is provided with a limit groove that matches with the positioning convex point of the saddle part; A sliding guide rail is provided, a sliding block is installed on the sliding guide rail, the sliding block is fixedly connected with the buckle assembly, and the buckle assembly forms a horizontal sliding fit with the test bench along the axial direction of the guide rail. 2. The PE saddle-type bypass pipe fitting air tightness testing machine according to claim 1, wherein the fixed seat comprises a saddle-type base adapted to the saddle-shaped part of the saddle-type bypass pipe fitting, and the saddle-type base A sealing groove is provided corresponding to the nozzle, the nozzle sealing assembly includes a nozzle sealing ring arranged in the sealing groove, and the nozzle and the saddle-shaped base are in sealing contact through the nozzle sealing ring. 3. The PE saddle-type bypass pipe fitting air tightness testing machine according to claim 1 or 2, wherein the tool tube port sealing assembly comprises a tool tube port sealing end cap and a driving tool tube port sealing end cap Tool tube port power mechanism that moves towards or away from the tool tube port. 4. The PE saddle type bypass pipe fitting air tightness tester according to claim 1 or 2, wherein the bypass pipe port sealing assembly comprises a bypass pipe port sealing end cap and a drive bypass pipe port A bypass port power mechanism that seals the end cap toward or away from the bypass port. 5. The PE saddle-type bypass pipe fitting air-tightness testing machine according to claim 1 or 2, wherein the tool tube positioning structure comprises two guide posts installed on the test bench, which are installation guide posts respectively and limit guide pillars, the two guide pillars are located on the left and right sides of the fixed seat and at the front end of the tool tube. The installation guide pillar is provided with a positioning crossbar, which can move up and down along the installation guide pillar. Lifting and positioning structure, the positioning cross bar and the limit guide column form a limit fit for circumferential rotation. 6. The PE saddle-type bypass pipe fitting air tightness testing machine according to claim 5, characterized in that: there is a gap between the free end of the positioning crossbar and the limit guide post, and the positioning crossbar is provided with a The positioning groove is adapted to the outer wall of the tool tube. The free end of the positioning cross bar is hinged with a limit cross bolt. The limit cross bolt has at least two positions. The limit cross bolt forms a limit structure with the limit guide post at the first position. At the second position, the position cross bolt is disengaged from the limit cooperation between the limit cross bolt and the limit guide post. 7. The PE saddle-type bypass pipe fitting air tightness testing machine according to claim 6, wherein a support block is installed on the positioning cross bar, and the positioning groove is arranged on the side of the support block facing the tool tube One end of the positioning crossbar is installed on the installation guide rail through a linear bearing. The lifting and positioning structure includes a positioning sleeve sleeved on the installation guide rail. The positioning sleeve is located under the positioning crossbar. The positioning hole is matched with a positioning fastener; the power mechanism includes a cylinder, the cylinder is installed on the test bench through a pressure plate, and the guide rod of the cylinder extends out of the cylinder and is linked with the hook.

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