CN111238798A - Air tightness detection device of precision valve - Google Patents
Air tightness detection device of precision valve Download PDFInfo
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- CN111238798A CN111238798A CN202010134824.3A CN202010134824A CN111238798A CN 111238798 A CN111238798 A CN 111238798A CN 202010134824 A CN202010134824 A CN 202010134824A CN 111238798 A CN111238798 A CN 111238798A
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- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 17
- 238000013461 design Methods 0.000 abstract description 6
- 238000007664 blowing Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2884—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for welds
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses an air tightness detection device of a precision valve, which comprises a bracket, a first air cylinder fixing frame, a second air cylinder fixing frame and a third air cylinder fixing frame, wherein the first air cylinder fixing frame is arranged on the bracket; the first cylinder fixing frame, the second cylinder fixing frame and the third cylinder fixing frame are respectively provided with a first cylinder, a second cylinder and a third cylinder; the precision valve comprises a valve barrel and a valve core which are welded together up and down, and the peripheral side wall of the valve core is provided with a first nozzle, a second nozzle and a third nozzle at equal intervals along the circumferential direction; the first nozzle, the second nozzle and the third nozzle are arranged in a manner of corresponding to the push rods on the first cylinder, the second cylinder and the third cylinder; the first cylinder, the second cylinder and the third cylinder are respectively used for correspondingly propping against the first nozzle, the second nozzle and the third nozzle of the valve core after the push rod extends out; the top opening of the valve cylinder is embedded with a sealing sleeve. The invention has scientific structural design, can flexibly design the positioning device according to the size of the precision valve, and can meet the requirement of detecting the air tightness of the welding seam of the precision valves with different sizes.
Description
Technical Field
The invention relates to the technical field of mechanical automation, in particular to an air tightness detection device of a precision valve, belonging to the technical field of air tightness detection.
Background
At present, the leakage of the welding seam is one of the problems frequently encountered in engineering, and all systems or parts related to liquid (or gas) can have the leakage problem. In engineering, certain airtightness requirements are imposed on these systems or parts, and strict airtightness inspection is required.
For a precision valve, a spiral pushing part is arranged in the precision valve, the channel structure is complex, the prior art cannot realize the integral forming of the precision valve through casting and machining, the precision valve can be respectively machined by adopting an upper half-dividing mode and a lower half-dividing mode at present, and then the upper half-dividing mode and the lower half-dividing mode are welded into a whole.
The welding premise is as follows: the whole welding line of the precision valve has good air tightness, and the situations of air leakage and water seepage cannot occur. In the welding seam gas tightness testing process in the past, owing to lack the supplementary detection device of gas tightness of special precision valve welding seam, for guaranteeing the compactness of contact, need several operation workman cooperations to detect, aim at the airtight valve entry and block up each gas vent with ordinary airtight detection device's gas transmission pipe mouth, another person then adjusts the pressure that detects gas and the gas tightness condition of looking over the welding seam, consequently, on the whole, the traditional detection device of current precision valve, detection efficiency is low, detection effect is relatively poor, and the cost of labor who detects is higher.
Disclosure of Invention
The invention aims to provide an air tightness detection device of a precision valve, aiming at the technical defects in the prior art.
Therefore, the invention provides an air tightness detection device of a precision valve, which comprises a bracket;
a workbench is arranged on the right side of the top of the bracket;
the workbench is provided with a first cylinder fixing frame, a second cylinder fixing frame and a third cylinder fixing frame at equal intervals along the circumferential direction;
the first cylinder fixing frame, the second cylinder fixing frame and the third cylinder fixing frame are respectively provided with a first cylinder, a second cylinder and a third cylinder;
the precision valve needing to be subjected to the air tightness test comprises a valve barrel and a valve core which are welded together up and down, wherein the peripheral side wall of the valve core is provided with a first nozzle, a second nozzle and a third nozzle at equal intervals along the circumferential direction;
the first nozzle, the second nozzle and the third nozzle are arranged opposite to and corresponding to the push rods on the first cylinder, the second cylinder and the third cylinder;
the first cylinder, the second cylinder and the third cylinder are respectively used for correspondingly propping against the first nozzle, the second nozzle and the third nozzle of the valve core after the push rod extends out;
the top of the valve cylinder is provided with an opening, and a sealing sleeve is embedded in the opening;
the sealing sleeve is tightly attached to the top opening of the valve barrel.
Wherein, the center of the top of the workbench is provided with a valve fixing base;
the top of the valve fixing base is provided with a ring groove with an upward opening;
the bottom of the valve core is embedded into the annular groove;
the ring groove is internally provided with a rubber ring for sealing.
Wherein, the outer wall of the lower part of the valve cylinder is sleeved with a first fixed block and a first fixed seat;
the first fixing block and the first fixing seat are combined together to form a sleeve accommodating hole;
the valve cylinder is positioned in the sleeve accommodating hole;
the left end of the top of the bracket is provided with a vertical stand which is vertically distributed;
the first fixing seat is installed on the lower portion of the right side of the vertical frame.
Wherein, an air cylinder which is provided with an upper opening and a lower opening and is communicated is arranged right above the valve cylinder;
a sealing sleeve is arranged right below the inflator;
the outer wall of the upper part of the air cylinder is sleeved with a third fixed block and a third fixed seat;
the outer wall of the lower part of the air cylinder is sleeved with a second fixed block and a second fixed seat;
the left sides of the second fixed seat and the third fixed seat are respectively fixed on the right sides of the sliding plates which are vertically distributed;
the sliding plate can move up and down in the vertical direction under the pushing of an external force.
Wherein, the upper part of the right side of the sliding plate is provided with a first supporting plate which is horizontally distributed;
a fifth cylinder is fixedly arranged at the upper end of the right side of the vertical frame;
the second push rod extends out of the bottom of the fifth cylinder and is connected with the top of the first supporting plate at the upper part of the right side of the sliding plate;
two guide supporting plates are respectively arranged at the front end and the rear end of the right side wall of the vertical frame;
a third guide rod which is vertically distributed is fixedly connected between the two guide supporting plates positioned on the front side;
a fourth guide rod which is vertically distributed is fixedly connected between the two guide supporting plates positioned at the rear side;
two guide sliding blocks are respectively arranged at the front end and the rear end of the right side of the sliding plate;
and the guide sliding blocks are correspondingly sleeved on the outer surfaces of the adjacent third guide rods or the adjacent fourth guide rods.
Two second supporting plates which are horizontally distributed are arranged right above the first supporting plate;
the two second supporting plates are distributed at intervals from left to right;
the tops of the two second supporting plates are respectively provided with a second pneumatic clamping device and a first pneumatic clamping device;
a fourth supporting plate and a third supporting plate which are vertically distributed are respectively arranged right behind the second pneumatic clamping device and the first pneumatic clamping device;
the bottoms of the fourth supporting plate and the third supporting plate are fixedly connected with the top surface of the first supporting plate;
and the first pneumatic clamping device and the second pneumatic clamping device are respectively used for correspondingly clamping the tops of the third supporting plate and the fourth supporting plate.
Wherein, the top of the first supporting plate is provided with a fourth cylinder;
a first push rod extending out of the bottom of the fourth cylinder penetrates through a through hole reserved in the first supporting plate and is fixedly connected with the top surface of the piston plate;
the piston plate is inserted into the air cylinder and is tightly contacted with the inner side wall of the air cylinder;
the bottom surface of the piston plate is fixedly connected with the top of the sealing sleeve.
The left side and the right side of the first push rod are respectively provided with a second guide rod and a first guide rod which are vertically distributed;
the top of the first supporting plate is provided with a hollow guide post with openings at the upper end and the lower end at the positions corresponding to the upper ends of the second guide rod and the first guide rod respectively;
the tops of the two guide columns are respectively fixedly connected with the bottom surfaces of the two second supporting plates;
the upper parts of the second guide rod and the first guide rod respectively vertically penetrate through the through holes reserved on the first supporting plate and then penetrate through the two guide columns;
the tops of the first guide rod and the second guide rod are respectively provided with a first roller in a pivoted mode;
the first guide rod and the second guide rod are identical in shape and structure;
the bottom parts of the second guide rod and the first guide rod are respectively and fixedly connected with the top part of the piston plate.
Wherein, the lower part of the second supporting plate is provided with a first chute;
the first guide block can move along the first sliding chute;
the lower part of the first guide block is fixedly connected with a first wedge-shaped block;
the side edge of the first wedge-shaped block is fixedly connected with a third supporting plate;
and the first pneumatic clamping device is used for clamping the third supporting plate and can push the first wedge-shaped block to move downwards so that the first guide rod presses the piston plate.
Compared with the prior art, the air tightness detection device for the precision valve has the advantages that the structural design is scientific, the positioning device can be flexibly designed according to the size of the precision valve, and the requirement on the air tightness detection of the welding seams of the precision valves with different sizes can be met.
The invention has the advantages of easy processing and manufacture and convenient operation, obviously shortens the time of air tightness detection, and reduces the workload and the working difficulty in the air tightness detection of the welding seam of the precision valve.
The invention can solve the problems that the existing precision valve welding seam airtightness detection device does not have a mature detection device and cannot carry out high-efficiency detection on the precision valve.
Drawings
FIG. 1 is a schematic structural diagram of an air tightness detection device of a precision valve according to the present invention;
FIG. 2 is a perspective exploded view of an air tightness detecting device of a precision valve according to the present invention;
fig. 3 is an exploded view of an upper main structure of an air tightness detecting device of a precision valve according to the present invention.
Fig. 4 is a partially exploded view of a clamping mechanism (a first pneumatic clamping device) in the air tightness detection device of the precision valve provided by the invention.
In the figure: 1. the device comprises a support, 2, a workbench, 301, a first cylinder fixing frame, 302, a second cylinder fixing frame, 303 and a third cylinder fixing frame;
4. a first cylinder, 5. a second cylinder; 6. the valve comprises a third cylinder, 7 valve cores, 8 valve barrels, 9 first fixed blocks and 10 first fixed seats;
11. a second fixed block 12, a second fixed seat 13, an air cylinder 13, and a third fixed block 14; 15. a third fixed seat;
16. the first guide rod 17, the first push rod 18, the guide support plate 19, the guide slide block 20, the third guide rod;
21. the pneumatic clamping device comprises a first supporting plate, a second supporting plate, a first pneumatic clamping device, a third supporting plate, a fourth pneumatic clamping device, a third supporting plate and a fourth supporting plate, wherein the first supporting plate is 22;
26. a second push rod; 27. a fifth cylinder, 28, a second guide rod, 29, a guide column, 30, a valve fixing base;
31. a rubber ring, 32, a second pneumatic clamping device, 33, a fourth supporting plate, 34, a fourth guide rod, 35, a first nozzle;
36. second nozzle, 37 third nozzle, 38 gland, 39 sliding plate, 40 piston plate;
41. the first roller 42, the first wedge block 43, the first guide block 44 and the first sliding groove.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments.
Referring to fig. 1 to 4, the present invention provides an air tightness detecting apparatus of a precision valve, including a bracket 1;
a workbench 2 is arranged on the right side of the top of the bracket 1;
the workbench 2 is provided with a first cylinder fixing frame 301, a second cylinder fixing frame 302 and a third cylinder fixing frame 303 at equal intervals along the circumferential direction;
a first cylinder 4, a second cylinder 5 and a third cylinder 6 are respectively arranged on the first cylinder fixing frame 301, the second cylinder fixing frame 302 and the third cylinder fixing frame 303;
the precision valve needing to be subjected to the air tightness test comprises a valve barrel 8 and a valve core 7 which are welded together from top to bottom, wherein the peripheral side wall of the valve core 7 is provided with a first nozzle 35, a second nozzle 36 and a third nozzle 37 at equal intervals along the circumferential direction;
the first nozzle 35, the second nozzle 36 and the third nozzle 37 are arranged opposite to the push rods on the first cylinder 4, the second cylinder 5 and the third cylinder 6;
the first cylinder 4, the second cylinder 5 and the third cylinder 6 are respectively used for correspondingly propping against a first nozzle 35, a second nozzle 36 and a third nozzle 37 of the valve core 7 after the push rod extends out;
the top of the valve cylinder 8 is provided with an opening, and a sealing sleeve 8 is embedded in the opening;
the sealing sleeve 8 is tightly attached to the top opening of the valve cylinder 8. That is, the top opening of the valve cylinder 8 is held by the sealing sleeve 8.
In the invention, in the concrete implementation, a valve fixing base 30 is arranged at the center of the top of the workbench 2;
the top of the valve fixing base 30 has an upward opening ring groove 300;
the bottom of the valve core 7 is embedded into the annular groove 300;
the ring groove 300 is provided with a rubber ring 31 for sealing.
In the invention, in order to prevent the valve cylinder 8 from moving slightly, a first fixed block 9 and a first fixed seat 10 are sleeved on the outer wall of the lower part of the valve cylinder 8;
the first fixed block 9 and the first fixed seat 10 are combined together to form a sleeve accommodating hole;
the valve cartridge 8 is located in the sleeve receiving bore;
the left end of the top of the bracket 1 is provided with a vertical stand 101 which is vertically distributed;
the first fixing base 10 is installed at the lower right side of the stand 101.
In the concrete implementation, an air cylinder 13 which is provided with an upper opening and a lower opening and is communicated is arranged right above the valve cylinder 8;
a sealing sleeve 38 is arranged right below the air cylinder 13;
the outer wall of the upper part of the air cylinder 13 is sleeved with a third fixed block 14 and a third fixed seat 15;
it should be noted that the third fixing block 14 and the third fixing seat 15 are combined together to form a first cylinder receiving hole, and the cylinder 13 is located in the first cylinder receiving hole;
the outer wall of the lower part of the air cylinder 13 is sleeved with a second fixed block 11 and a second fixed seat 12;
it should be noted that the second fixing block 11 and the second fixing block 12 are combined together to form a second cylinder receiving hole, and the cylinder 13 is located in the second cylinder receiving hole;
the left sides of the second fixed seat 12 and the third fixed seat 15 are respectively fixed on the right sides of the sliding plates 39 which are vertically distributed;
the slide plate 39 can be moved up and down in the vertical direction by an external force.
In concrete implementation, a first support plate 21 which is horizontally distributed is arranged at the upper part of the right side of the sliding plate 39;
a fifth cylinder 27 is fixedly arranged at the upper end of the right side of the vertical frame 101;
a second push rod 26 extended from the bottom of the fifth cylinder 27 and connected to the top of the first support plate 21 at the upper right side of the sliding plate 39;
two guide support plates 18 (four guide support plates 18 in total) are respectively arranged at the front end and the rear end of the right side wall of the vertical frame 101;
a third guide rod 20 which is vertically distributed is fixedly connected between the two guide support plates 18 positioned at the front side;
a fourth guide rod 34 vertically distributed is fixedly connected between the two guide support plates 18 at the rear side;
two guide slide blocks 19 are respectively arranged at the front end and the rear end of the right side of the sliding plate 39;
and the guide sliding block 19 is correspondingly sleeved on the outer surface of the adjacent third guide rod 2 or fourth guide rod 34.
Therefore, according to the present invention, the fifth cylinder 27 is installed on the stand 101, and the sliding plate 39 is moved up and down in the vertical direction along the third guide bar 20 by the second push rod 26.
In a concrete implementation, two second supporting plates 22 which are horizontally distributed are arranged right above the first supporting plate 21;
the two second supporting plates 22 are distributed at intervals from left to right;
the tops of the two second supporting plates 22 are respectively provided with a second pneumatic clamping device 32 and a first pneumatic clamping device 23;
a fourth supporting plate 33 and a third supporting plate 24 which are vertically distributed are respectively arranged right behind the second pneumatic clamping device 32 and the first pneumatic clamping device 23;
the bottom parts of the fourth supporting plate 33 and the third supporting plate 24 are fixedly connected with the top surface of the first supporting plate 21;
and first and second pneumatic clamping devices 23 and 32 for correspondingly clamping the top of the third and fourth support plates 24 and 33, respectively.
It should be noted that, in a specific implementation, the first pneumatic clamping device 23 and the second pneumatic clamping device 32 are conventional pneumatic clampers.
In the concrete implementation, a fourth cylinder 25 is installed on the top of the first supporting plate 21;
the first push rod 17 extending out of the bottom of the fourth cylinder 25 penetrates through a through hole reserved on the first support plate 21 and is fixedly connected with the top surface of the piston plate 40;
the piston plate 40 is inserted into the cylinder 13 and is in close contact with the inner side wall of the cylinder 13;
the bottom surface of the piston plate 40 is fixedly connected with the top of the sealing sleeve 8.
Therefore, with the present invention, in view of the fact that the fourth cylinder 25 is mounted on the first support plate 21, the piston plate 40 can be driven by the first push rod 17 to move up and down along the inner wall of the cylinder 13, so that the sealing sleeve 8 moves up and down along with the piston plate 40, thereby being capable of abutting against the top opening of the valve cylinder 8.
In particular, the left side and the right side of the first push rod 17 are respectively provided with a second guide rod 28 and a first guide rod 16 which are vertically distributed;
a hollow guide post 29 with both open upper and lower ends is mounted on the top of the first support plate 21 at a position corresponding to the upper ends of the second guide bar 28 and the first guide bar 16;
the tops of the two guide posts 29 are fixedly connected with the bottom surfaces of the two second supporting plates 22 respectively;
the upper parts of the second guide rod 28 and the first guide rod 16 vertically penetrate through the through holes reserved on the first support plate 21 and then penetrate through the two guide columns 29;
a first roller 41 is pivotally (i.e., rotatably) mounted on the top of each of the first guide bar 16 and the second guide bar 28;
the first guide bar 16 and the second guide bar 28 are identical in shape and configuration;
the second guide rod 28 and the bottom of the first guide rod 16 are fixedly connected to the top of the piston plate 40, respectively.
Therefore, according to the present invention, the second guide bar 28 and the first guide bar 16 are slidably engaged with the two guide posts 29, and the height can be adjusted in a vertical direction by extending and contracting the guide posts.
In order to more clearly understand the technical solution of the present invention, the following describes the working principle of the present invention.
In the specific use of the air tightness testing device provided by the invention, firstly, the valve core 7 and the valve cylinder 8 of the precision valve are placed on the valve fixing base 30, the first air cylinder 4 is propped against the first nozzle 35, the second air cylinder 5 is propped against the second nozzle 36, and the third air cylinder 6 is propped against the third nozzle 37.
The sliding plate 39 is then pushed downwards by the fifth cylinder 27, pushing the sealing sleeve 38 against the top open upper part of the valve barrel 8. At this time, the first pneumatic gripper 23 and the second pneumatic gripper 32 grip the third support plate 24 and the fourth support plate 33.
In the present invention, in a specific implementation, a first roller 41 is installed on the top of the first guide rod 16;
the lower part of the second supporting plate 22 is provided with a first sliding chute 44;
the first guide block 43 is movable (slide-fitted) along the first slide groove 44;
the lower part of the first guide block 43 is fixedly connected with a first wedge block 42;
the side edge of the first wedge-shaped block 42 is fixedly connected with a third supporting plate 24;
the first pneumatic clamping device 23, which is used to clamp the third support plate 24, pushes the first wedge 42 to move downward, so that the first guide rod 16 presses against the piston plate 40.
It should be noted that, for the present invention, when the first guide rod 16 contacts the lower side of the first wedge-shaped block 42, in order to better ensure the sealing performance of the piston plate 40, the first wedge-shaped block 42 can be pushed to move slightly by clamping the third support plate 24 by the first pneumatic clamping device 23, so that the first guide rod 16 is pressed against the piston plate 40.
Note that the second pneumatic clamp 32 clamps the fourth support plate 33. The lower structure is similar to the first pneumatic clamp 23, and functions in the same manner, except that the corresponding guide bar is the second guide bar 28 (having the same shape and configuration as the first guide bar 16), and the corresponding support plate is the fourth support plate 33 (having the same shape and configuration as the third support plate 24).
Then, the air is blown into the blowing cylinder of the fourth air cylinder 25 (specifically, the blowing cylinder), and if the fourth air cylinder 25 moves forward slowly, the sealing sleeve 38 moves downward along the top opening of the valve cylinder 8, thereby indicating that air leaks from the welding point of the valve cylinder 8 and the valve element 7 of the precision valve, and if the fourth air cylinder 25 is not moved, the sealing sleeve 38 cannot move downward along the top opening of the valve cylinder 8, indicating that the sealing state in the valve cylinder 8 is good, and that air does not leak from the welding point of the valve cylinder 8 and the valve element 7 of the precision valve.
It should be noted that, through the above structural design of the invention, the welding operation is convenient and flexible, the welding quality is stable and reliable, the efficiency is high, and the invention has good practical application.
In summary, compared with the prior art, the air tightness detection device for the precision valve provided by the invention has a scientific structural design, can flexibly design the positioning device according to the size of the precision valve, and can meet the requirement of the air tightness detection of the welding seam of the precision valve with different sizes.
The invention has the advantages of easy processing and manufacture and convenient operation, obviously shortens the time of air tightness detection, and reduces the workload and the working difficulty in the air tightness detection of the welding seam of the precision valve.
The invention can solve the problems that the existing precision valve welding seam airtightness detection device does not have a mature detection device and cannot carry out high-efficiency detection on the precision valve.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The air tightness detection device of the precision valve is characterized by comprising a bracket (1);
a workbench (2) is arranged on the right side of the top of the bracket (1);
a first cylinder fixing frame (301), a second cylinder fixing frame (302) and a third cylinder fixing frame (303) are arranged on the workbench (2) at equal intervals along the circumferential direction;
a first cylinder (4), a second cylinder (5) and a third cylinder (6) are respectively arranged on the first cylinder fixing frame (301), the second cylinder fixing frame (302) and the third cylinder fixing frame (303);
the precision valve needing to be subjected to the air tightness test comprises a valve barrel (8) and a valve core (7) which are welded together from top to bottom, wherein the peripheral side wall of the valve core (7) is provided with a first nozzle (35), a second nozzle (36) and a third nozzle (37) at equal intervals along the circumferential direction;
the first nozzle (35), the second nozzle (36) and the third nozzle (37) are arranged opposite to the push rods on the first cylinder (4), the second cylinder (5) and the third cylinder (6);
the first cylinder (4), the second cylinder (5) and the third cylinder (6) are respectively used for correspondingly propping against a first nozzle (35), a second nozzle (36) and a third nozzle (37) of the valve core (7) after the push rod extends out;
the top of the valve cylinder (8) is opened, and a sealing sleeve (8) is embedded in the valve cylinder;
the sealing sleeve (8) is tightly attached to the top opening of the valve barrel (8).
2. The airtightness detection apparatus for a precision valve according to claim 1, wherein a valve fixing base (30) is installed at a top center position of the table (2);
the top of the valve fixing base (30) is provided with an annular groove (300) with an upward opening;
the bottom of the valve core (7) is embedded into the annular groove (300);
the annular groove (300) is internally provided with a rubber ring (31) for sealing.
3. The air tightness detecting device of the precision valve according to claim 1, characterized in that the lower outer wall of the valve cylinder (8) is sleeved with a first fixed block (9) and a first fixed seat (10);
the first fixed block (9) and the first fixed seat (10) are combined together to form a sleeve accommodating hole;
a valve cartridge (8) is located in the sleeve receiving bore;
the left end of the top of the bracket (1) is provided with a vertical stand (101) which is vertically distributed;
the first fixed seat (10) is arranged at the lower part of the right side of the stand (101).
4. The airtightness detection apparatus for a precision valve according to claim 3, wherein an air cylinder (13) having an upper and lower opening and penetrating therethrough is mounted directly above the valve cylinder (8);
a sealing sleeve (38) is arranged right below the air cylinder (13);
the outer wall of the upper part of the air cylinder (13) is sleeved with a third fixed block (14) and a third fixed seat (15);
the outer wall of the lower part of the air cylinder (13) is sleeved with a second fixed block (11) and a second fixed seat (12);
the left sides of the second fixed seat (12) and the third fixed seat (15) are respectively fixed on the right sides of the sliding plates (39) which are vertically distributed;
the sliding plate (39) can move up and down in the vertical direction under the pushing of an external force.
5. The airtightness detection apparatus for a precision valve according to claim 4, wherein a horizontally disposed first support plate (21) is mounted on an upper portion of a right side of the slide plate (39);
a fifth cylinder (27) is fixedly arranged at the upper end of the right side of the vertical frame (101);
a second push rod (26) extending out of the bottom of the fifth cylinder (27) is connected with the top of the first supporting plate (21) at the upper part of the right side of the sliding plate (39);
two guide support plates (18) are respectively arranged at the front end and the rear end of the right side wall of the vertical frame (101);
a third guide rod (20) which is vertically distributed is fixedly connected between the two guide support plates (18) positioned at the front side;
a fourth guide rod (34) which is vertically distributed is fixedly connected between the two guide support plates (18) positioned at the rear side;
two guide sliding blocks (19) are respectively arranged at the front end and the rear end of the right side of the sliding plate (39);
and the guide sliding block (19) is correspondingly sleeved on the outer surface of the adjacent third guide rod (2) or fourth guide rod (34).
6. The airtightness detection apparatus for a precision valve according to claim 5, wherein two second support plates (22) are mounted in a horizontal arrangement directly above the first support plate (21);
the two second supporting plates (22) are distributed at intervals from left to right;
the tops of the two second supporting plates (22) are respectively provided with a second pneumatic clamping device (32) and a first pneumatic clamping device (23);
a fourth supporting plate (33) and a third supporting plate (24) which are vertically distributed are respectively arranged right behind the second pneumatic clamping device (32) and the first pneumatic clamping device (23);
the bottoms of the fourth supporting plate (33) and the third supporting plate (24) are fixedly connected with the top surface of the first supporting plate (21);
and a first pneumatic clamping device (23) and a second pneumatic clamping device (32) for correspondingly clamping the top of the third support plate (24) and the fourth support plate (33), respectively.
7. The airtightness detecting apparatus for a precision valve according to claim 6, wherein a fourth cylinder (25) is mounted on the top of the first support plate (21);
a first push rod (17) extending out of the bottom of the fourth cylinder (2) penetrates through a through hole reserved in the first supporting plate (21) and is fixedly connected with the top surface of the piston plate (40);
the piston plate (40) is inserted into the air cylinder (13) and is tightly contacted with the inner side wall of the air cylinder (13);
the bottom surface of the piston plate (40) is fixedly connected with the top of the sealing sleeve (8).
8. The airtightness detection apparatus for a precision valve according to claim 7, wherein the first push rod (17) has vertically disposed second guide rods (28) and first guide rods (16) on both left and right sides thereof, respectively;
a hollow guide column (29) with openings at the upper end and the lower end is respectively arranged at the top of the first supporting plate (21) and at the position corresponding to the upper ends of the second guide rod (28) and the first guide rod (16);
the tops of the two guide columns (29) are fixedly connected with the bottom surfaces of the two second supporting plates (22) respectively;
the upper parts of the second guide rod (28) and the first guide rod (16) respectively vertically penetrate through the through holes reserved on the first supporting plate (21) and then penetrate through the two guide columns (29);
a first roller (41) is pivotally mounted at the top of each of the first guide rod (16) and the second guide rod (28);
the first guide rod (16) and the second guide rod (28) are identical in shape and structure;
the bottom parts of the second guide rod (28) and the first guide rod (16) are fixedly connected with the top parts of the piston plates (40) respectively.
9. The airtightness detecting apparatus for a precision valve according to claim 8, wherein the second support plate (22) has a first slide groove (44) at a lower portion thereof;
the first guide block (43) can move along the first sliding chute (44);
the lower part of the first guide block (43) is fixedly connected with a first wedge-shaped block (42);
the side edge of the first wedge-shaped block (42) is fixedly connected with a third supporting plate (24);
and the first pneumatic clamping device (23) is used for clamping the third supporting plate (24) and can push the first wedge block (42) to move downwards so that the first guide rod (16) is pressed against the piston plate (40).
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| CN111238798B (en) | 2024-06-11 |
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