CN104316271A - Air tightness testing tool for valve bodies of unthreaded hole connector types - Google Patents

Air tightness testing tool for valve bodies of unthreaded hole connector types Download PDF

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Publication number
CN104316271A
CN104316271A CN201410613904.1A CN201410613904A CN104316271A CN 104316271 A CN104316271 A CN 104316271A CN 201410613904 A CN201410613904 A CN 201410613904A CN 104316271 A CN104316271 A CN 104316271A
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CN
China
Prior art keywords
piston rod
rod
head bore
cart
head
Prior art date
Application number
CN201410613904.1A
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Chinese (zh)
Inventor
关鑫
刘训省
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天津博益气动股份有限公司
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Priority to CN201410613904.1A priority Critical patent/CN104316271A/en
Publication of CN104316271A publication Critical patent/CN104316271A/en

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Abstract

The invention provides an air tightness testing tool for valve bodies of unthreaded hole connector types. The air tightness testing tool comprises a piston rod, a pull-down sleeve, a piston sleeve and a plugging rubber gasket. A first head hole which is a blind hole is formed in the end face of the piston sleeve, a first rod hole penetrating through the piston sleeve is further formed in the bottom of the first head hole, the diameter of the first head hole is larger than that of the first rod hole, and the pull-down sleeve is placed in the first head hole and is in sliding fit with the inner wall of the first head hole. A second head hole which is a blind hole is formed in the end face of the pull-down sleeve, a second rod hole penetrating through the pull-down sleeve is further formed in the bottom of the second head hole, the diameter of the second head hole is larger than that of the second rod hole, the outer wall of the top end of the pull-down sleeve is annularly provided with a boss, the outer sidewall of the pull-down sleeve is sleeved with the plugging rubber gasket annularly, one end of the plugging rubber gasket abuts against the outer end face of the piston sleeve, and the other end of the plugging rubber gasket abuts against the bottom of the boss. The air tightness testing tool is suitable for connectors of various specifications of valve bodies made of various materials.

Description

A kind of air tightness test frock for unthreaded hole interface shape valve body

Technical field

The invention belongs to valve body interface air-leakage test field, especially relate to a kind of air tightness test frock for unthreaded hole interface shape valve body.

Background technology

Modern practical pneumatics is based on pneumatic antomation, the state-of-the-art transmission of the one hydraulic pressure robotization that mechanical automation, electric automatization and some occasion can comprise be closely as one and control technology.Its application has been not limited to the general industry fields such as standard machinery, lathe, automobile, be also rapidly to ultra dry, ultra-clean, high vacuum, energy-conserving and environment-protective, high frequency, at a high speed, the various fields expansion such as electronic semi-conductor, science life, food and drink, space flight and aviation that requires such as high precision.Multiple pneumatic element composition pneumatic circuit, wherein the break-make in the valve components control system loop such as solenoid valve, proportioning valve, needle valve, pressure regulation and speed governing are the crucial control elements in pneumatic system.Valve body leakage can cause high pressure to hurt sb.'s feelings and the problem such as damage equipment, and the leakage of special gas more can cause environmental pollution.Therefore, after each kind valve body is succeeded in developing, its air-leakage test is particularly important.

All kinds of application valve body is its sealing of guarantee in pneumatic circuit system, the mode that is connected and fixed many employings sealing thread structure of valve body and path and flange arrangement two kinds of forms; Part valve body, it is mainly used in Aero-Space, deep water visits wet goods industry, and due to operating condition and operating environment impact, its type of attachment is the particular interface of unthreaded hole structure; Usually adopt cylinder or the pushing of elbow folder to carry out shutoff to the airtight detection of the valve body of unthreaded hole structure tradition, these class methods require higher to valve body material, can not extrude or the valve body of high precision processing is then not suitable for adopting; Meanwhile, due to the change of environmental baseline, the product deformation that the temperature difference causes makes conventional method to meet and accurately detects the bubble-tight requirement of valve body.

Summary of the invention

The problem to be solved in the present invention is the air tightness detection tool of suitable for various size and various material valve body interface.

For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of air tightness test frock for unthreaded hole interface shape valve body, comprise piston rod, under help pull a cart, piston bush and shutoff cushion rubber;

Described piston bush end face has the first head bore into blind hole, the first rod aperture running through this piston bush is also had in the bottom of described first head bore, the aperture of described first head bore is greater than the aperture of the first rod aperture, to be describedly drop-downly placed in this first head bore and to be slidably matched with its inwall;

To help pull a cart under described the second head bore end face had into blind hole, the bottom of described second head bore also have run through described under second rod aperture of helping pull a cart, and the aperture of described second head bore is greater than the aperture of the second rod aperture, the top outer wall of helping pull a cart under described is equipped with boss, on the lateral wall that described shutoff cushion rubber ring set is helped pull a cart under described, and this shutoff cushion rubber one end is connected on the outer face of piston bush, its other end abuts with described boss bottom;

Described piston rod comprises the piston rod head on the body of rod and described body of rod top, the diameter of described piston rod head is greater than the diameter of the described body of rod, this piston rod is worn successively and is emitted through the second rod aperture and the first rod aperture and its piston rod head is placed in described second head bore, run through described piston rod and have sense channel, one end of this sense channel with under second head bore of helping pull a cart be communicated with.

Further, first head bore bottom surface of described piston bush and under form the placement space of an annular between the bottom surface of helping pull a cart, spring is provided with in this placement space, and one end of this spring is connected with the bottom surface of the first head bore, the other end with under the bottom surface of helping pull a cart be connected, one end face of described piston rod head with under the second head bore bottom surface of helping pull a cart form an airtight driving gap, described piston rod also runs through and has a driving passage, this driving passage is communicated with described driving gap, the sidewall of described piston rod head and described under the second head bore inwall slipper seal of helping pull a cart.

Further, the sidewall of described piston rod head with under the second head bore inwall of helping pull a cart by O-ring seal slipper seal, described piston rod also has a leakage path, described leakage path comprises the first road junction, the second road junction, the 3rd road junction and the 4th road junction, the sidewall that piston rod head is all located at described first road junction and the second road junction is respectively adjacent to described O-ring seal, described leakage path is in communication with the outside by its 3rd road junction, on the end face that described 4th road junction is positioned at piston rod head and the 4th road junction place seals a plugging steel ball.

Further, on the body of rod outer wall of described piston rod, cover has a stop chuck, an end face of this stop chuck and the bottom end face vicinity of described piston bush, the body of rod sidewall of described piston rod and the hole wall clearance fit of described first rod aperture.

Further, described stop chuck has intercommunicating pore, this intercommunicating pore is through hole, and the 3rd road junction of described leakage path is communicated with the intercommunicating pore stopped on chuck.

Further, described piston rod has safety and place groove, this is placed safely groove and is communicated with sense channel, place in groove in described safety and be provided with a discharge safety valve, this discharge safety valve regulates the pressure in sense channel, and safety lever one end of this discharge safety valve is connected to the connectivity part that safety places groove and sense channel.

Further, also comprise a solenoid valve, this solenoid control drives the opening and closing of passage.

Further, the centerline collineation of described first head bore, the first rod aperture, the second head bore, the second rod aperture and piston rod.

Further, the first head bore sidewall of described piston bush is also provided with a photoelectric sensor, and the detection side of this photoelectric sensor is to the axis parallel with described piston bush.

Further, the end face of described piston bush has the storage tank of annular, one end of described shutoff cushion rubber is connected in this storage tank and the cross-sectional diameter of this end is greater than the cross-sectional diameter of these other parts of shutoff cushion rubber, has cushion rubber groove around described shutoff cushion rubber madial wall.

The advantage that the present invention has and good effect are:

(1) this frock designs different from existing air-tightness testing tool, for the unthreaded hole interface structure of non-sealing screw thread structure and non-flange arrangement, can carry out the tensioner sealing of non-rigid contact.

(2) cushion rubber Tensioning structure adopts tensioner shutoff cushion rubber to be fixed on product, without the need to using screw fastening, reducing labour intensity, decreasing detection beat, improve work efficiency.

(3) for the product deformation that link temperature variation causes, the method of pneumatic adjustment is adopted to evade, namely when temperature rising product interface becomes large, this frock can according to the change of product continue drop-down described under help pull a cart, thus shutoff cushion rubber is continued product tensioner, and then reduce environmental baseline the use of air tightness detection tool is affected.

Accompanying drawing explanation

Fig. 1 is structure cut-open view of the present invention;

Fig. 2 is the structure cut-open view of leakage path of the present invention;

Fig. 3 is the annexation schematic diagram of discharge safety valve and sense channel;

Fig. 4 is structure installment figure of the present invention;

Fig. 5 is the circuit diagram that solenoid control drives passage keying.

In figure:

1, piston rod 11, piston rod head 121, O-ring seal 12, sense channel

13, drive passage 131, drive gap 14, passing channel 15, leakage path

1541, plugging steel ball 151, first road junction 2, under help pull a cart 21, placement space

3, piston bush 4, shutoff cushion rubber 41, cushion rubber groove 5, stop chuck

6, spring 7, solenoid valve 71, shift knob 72, button pressing plate

8, safety valve 81, safe cushion rubber 82, safety lever 83, safe blocking cap is discharged

84, safety spring 9, photoelectric sensor 91, revolve pin 111, piston cushion rubber

152, the second road junction 153, the 3rd road junction 154, the 4th road junction 101, source of the gas

102, power supply is controlled

Embodiment

Below in conjunction with accompanying drawing, specific embodiments of the invention are elaborated.

As Figure 1-4, a kind of air tightness test frock for unthreaded hole interface shape valve body, it comprise piston rod 1, under help pull a cart 2, piston bush 3 and shutoff cushion rubber 4;

Described piston bush 3 end face has the first head bore into blind hole, the first rod aperture running through this piston bush is also had in the center of the bottom of described first head bore, the aperture of described first head bore is greater than the aperture of the first rod aperture, helps pull a cart 2 to be placed in this first head bore and to be slidably matched with its inwall under described;

To help pull a cart under described the second head bore 2 end faces had into blind hole, the center of the bottom of described second head bore also have run through described under help pull a cart 2 the second rod aperture, and the aperture of described second head bore is greater than the aperture of the second rod aperture, help pull a cart under described 2 top outer wall be equipped with boss, described shutoff cushion rubber 4 ring set is helped pull a cart on the lateral wall of 2 under described, the end face of described piston bush 3 has the storage tank of annular, one end of described shutoff cushion rubber 4 is connected in this storage tank and the cross-sectional diameter of this end is greater than the cross-sectional diameter of these other parts of shutoff cushion rubber 4, the other end of this shutoff cushion rubber 4 abuts with boss bottom end face, cushion rubber groove 41 is had around described shutoff cushion rubber 4 madial wall,

Described piston rod 1 comprises the piston rod head 11 on the body of rod and described body of rod top, the diameter of described piston rod head 11 is greater than the diameter of the described body of rod, this piston rod 1 is worn successively and is emitted through the second rod aperture and the first rod aperture and its piston rod head 11 is placed in described second head bore, run through described piston rod 1 and have sense channel 12, one end of this sense channel 12 with under help pull a cart 2 the second head bore be communicated with.

The body of rod of described piston rod 1 and under help pull a cart 2 the second head bore hole wall between also overlap and have a piston cushion rubber 111, ensure its sealing.

First head bore bottom surface of described piston bush 3 and under help pull a cart 2 bottom surface between form the placement space 21 of an annular, spring 6 is provided with in 21 in this placement space, and one end of this spring 6 is connected with the bottom surface of the first head bore, the other end with under help pull a cart 2 bottom surface be connected, one end face of described piston rod head 11 with under help pull a cart 2 the second head bore bottom surface form an airtight driving gap 131, described piston rod 1 also runs through and has a driving passage 13, this driving passage 13 is communicated with described driving gap 131, the sidewall of described piston rod head 11 and described under help pull a cart 2 the second head bore inwall slipper seal,

Described spring 6 force of compression should be greater than O-ring seal 121 and piston cushion rubber 111 under help pull a cart 2 and piston bush 3 relative motion time the friction force that produces.

The diameter of described piston rod head 11 is greater than the diameter of these other parts of piston rod 1, simultaneously piston rod head 11 diameter with under to help pull a cart the diametric fit of the second head bore in 2, and described piston rod 1, piston bush 3 and under to help pull a cart 2 equal coaxial lines, help pull a cart 2 under this, processing quality of fit between piston bush 3 and piston rod 1 should within the scope of 0.2 to 0.4mm;

The sidewall of described piston rod head 11 with under help pull a cart 2 the second head bore inwall by O-ring seal 121 slipper seal, described piston rod 1 also has a leakage path 15, described leakage path 15 comprises the first road junction, second road junction, 3rd road junction and the 4th road junction, the sidewall that piston rod head 11 is all located at described first road junction and the second road junction is respectively adjacent to described O-ring seal 121, or the O-ring seal 121 had at piston rod head 11 outer wall cover can be two, so the first road junction and the second road junction can be located between two O-ring seals 121 respectively, described leakage path 15 is in communication with the outside by its 3rd road junction, on the end face that described 4th road junction is positioned at piston rod head 11 and the 4th road junction is sealed by a plugging steel ball 151.

On the body of rod outer wall of described piston rod 1, cover has a stop chuck 5, an end face of this stop chuck 5 and the bottom end face vicinity of described piston bush 3, the body of rod sidewall of described piston rod 1 and the hole wall clearance fit of described first rod aperture; When piston rod 1, with piston bush 3, relative motion occurs time, stop that chuck 5 just serves spacing effect, limit piston rod 1 and the too much generation relative movement of piston bush 3.

Described stop chuck 5 has intercommunicating pore, and this intercommunicating pore is through hole, and the 3rd road junction of described leakage path 15 is communicated with the intercommunicating pore stopped on chuck 5, when detection is leaked by being connected can accomplishing with stop chuck 5.

Described piston rod 1 has safety and place groove, this is placed safely groove and is communicated with sense channel 12, place in groove in described safety and be provided with a discharge safety valve 8, this discharge safety valve 8 regulates the pressure in sense channel 12, and safety lever 82 one end of this discharge safety valve 8 is connected to the connectivity part that safety places groove and sense channel 12;

The internal structure of described discharge safety valve 8 is identical with general safety valve, described discharge safety valve 8 comprises safety lever 82, safe cushion rubber 81, safe blocking cap 83 and safety spring 84, one end cover of described safety lever 82 has safe cushion rubber 81 and is connected to installs groove and sense channel 12 connectivity part, the other end cover of this safety lever 82 has safety spring 84, described safety spring 84 one end is connected to safety lever 82 place, the other end is connected to safe blocking cap 83 place, described safe blocking cap 83 has perforation, described safety lever 82 is placed in the inside of this safe blocking cap 83 by this perforation, wherein safe cushion rubber 81 can adopt fluorine glue or the silica gel of hardness 40 to 60 °, require to calculate according to blowdown presssure and select safety spring 84.

This frock also comprises a solenoid valve 7, this solenoid valve 7 controls the opening and closing driving passage 13, the shift knob 71 of described solenoid valve 7 is fixed on the body of rod outer wall of piston rod 1 by button pressing plate 72, and described button pressing plate 72 is provided with push-button recess, and this push-button recess is used for clamping stagnation shift knob 71.

First head bore sidewall of described piston bush 3 is also provided with one by revolving the fixing photoelectric sensor 9 of pin 91, the detection side of this photoelectric sensor 9 is to the axis parallel with described piston bush 3;

Described piston rod 1 also has passing channel 14, and the effect of this passing channel 14 was used to the electric wire that solenoid valve 7 uses.

Photoelectric sensor 9 and the solenoid valve 7 of this frock all control by controller.

The principle of work of the present embodiment:

This frock that hand-held driving passage 13 has been communicated with source of the gas 101, product on shutoff cushion rubber 4 outer wall cover, this product can be connected in the containing groove on piston bush end face, the sealing of such shutoff cushion rubber 4 to this product is better, whether photoelectric sensor 9 is used for testing product and is in place, and after determining installation, opens the test source of the gas 101 of product, control a source of the gas 101 by solenoid valve 7 and another effect is provided, and ensure that test product is closed condition;

By the enabling signal that controller is launched, Controlling solenoid valve 7 is opened, or manually start the shift knob 71 of solenoid valve 7, ensure to drive passage 13 unimpeded with the connection of source of the gas 101, source of the gas 101 is entered by the driving passage 13 in piston rod 1 and drives in gap 131, and because piston bush 3 is for fixing, so gas produce pressure act on down help pull a cart 2 the second head bore bottom, cause down 2 Compress Springs 6 of helping pull a cart to produce deformation and become general orientation motion towards driving gap 131, now shutoff cushion rubber 4 deforms, the shutoff stress point extruded product inwall that shutoff cushion rubber 4 is out of shape, form fastening shutoff, thus product and under help pull a cart 2 the second head bore between form airtight chamber, then the connection driving passage 13 and source of the gas 101 is closed by solenoid valve 7,

Secondly, sense channel 12 is connected with the bubble-tight instrument of detection, and when there is gas leakage, gas leakage enters detecting instrument by the sense channel 12 of piston rod 1, discriminating test result;

When gas leakage superpressure is excessive, leak the force of compression that air pressure is greater than safety spring 84, now safety lever 82 drives safe cushion rubber 81 to open, and then is discharged by overpressure gases;

This frock of Long-Time Service can cause the wearing and tearing of piston cushion rubber 111 and O-ring seal 121, that causes between product and frock is poorly sealed, and whether operating personnel have gas to eject to judge change piston cushion rubber 111, O-ring seal 121 whether foundation by detecting leakage path 15;

Be completed, under the gas of helping pull a cart in 2 second head bore by starting solenoid valve 7, ensure to drive passage 13 to be in communication with the outside and Exhaust Gas by solenoid valve 7, spring 6 is helped pull a cart under promoting and 2 is got back to initial position, shutoff cushion rubber 4 deformation is normal, manually takes out and detects frock, be completed.

Above embodiments of the invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the scope of the invention change and improve, and all should still belong within this patent covering scope.

Claims (10)

1., for an air tightness test frock for unthreaded hole interface shape valve body, it is characterized in that: comprise piston rod (1), under help pull a cart (2), piston bush (3) and shutoff cushion rubber (4);
Described piston bush (3) end face has the first head bore into blind hole, the first rod aperture running through this piston bush is also had in the bottom of described first head bore, the aperture of described first head bore is greater than the aperture of the first rod aperture, and help pull a cart under described (2) to be placed in this first head bore and to be slidably matched with its inwall;
To help pull a cart under described the second head bore (2) end face had into blind hole, the bottom of described second head bore also have run through described under to help pull a cart second rod aperture of (2), and the aperture of described second head bore is greater than the aperture of the second rod aperture, the top outer wall of (2) of helping pull a cart under described is equipped with boss, described shutoff cushion rubber (4) ring set is helped pull a cart on the lateral wall of (2) under described, and this shutoff cushion rubber (4) one end is connected on the outer face of piston bush (3), its other end abuts with described boss bottom;
Described piston rod (1) comprises the piston rod head (11) on the body of rod and described body of rod top, the diameter of described piston rod head (11) is greater than the diameter of the described body of rod, this piston rod (1) is worn successively and is emitted through the second rod aperture and the first rod aperture and its piston rod head (11) is placed in described second head bore, run through described piston rod (1) and have sense channel (12), one end of this sense channel (12) with under help pull a cart second head bore of (2) be communicated with.
2. a kind of air tightness test frock for unthreaded hole interface shape valve body according to claim 1, it is characterized in that: the first head bore bottom surface of described piston bush (3) and under help pull a cart (2) bottom surface between form the placement space (21) of an annular, spring (6) is provided with in (21) in this placement space, and one end of this spring (6) is connected with the bottom surface of the first head bore, the other end with under the help pull a cart bottom surface of (2) be connected, one end face of described piston rod head (11) with under the help pull a cart second head bore bottom surface of (2) form an airtight driving gap (131), described piston rod (1) also runs through and has a driving passage (13), this driving passage (13) is communicated with described driving gap (131), the sidewall of described piston rod head (11) and described under to help pull a cart the second head bore inwall slipper seal of (2).
3. a kind of air tightness test frock for unthreaded hole interface shape valve body according to claim 1 and 2, it is characterized in that: the sidewall of described piston rod head (11) with under help pull a cart the second head bore inwall of (2) by O-ring seal (121) slipper seal, described piston rod (1) also has a leakage path (15), described leakage path (15) comprises the first road junction, second road junction, 3rd road junction and the 4th road junction, the sidewall that piston rod head (11) are all located at described first road junction and the second road junction is respectively adjacent to described O-ring seal (121), described leakage path (15) is in communication with the outside by its 3rd road junction, on the end face that described 4th road junction is positioned at piston rod head (11) and the 4th road junction place seals a plugging steel ball (151).
4. a kind of air tightness test frock for unthreaded hole interface shape valve body according to claim 3, it is characterized in that: on the body of rod outer wall of described piston rod (1), cover has a stop chuck (5), one end face of this stop chuck (5) and the bottom end face vicinity of described piston bush (3), the body of rod sidewall of described piston rod (1) and the hole wall clearance fit of described first rod aperture.
5. a kind of air tightness test frock for unthreaded hole interface shape valve body according to claim 4, it is characterized in that: described stop chuck (5) has intercommunicating pore, this intercommunicating pore is through hole, and the 3rd road junction of described leakage path (15) is communicated with the intercommunicating pore stopped on chuck (5).
6. a kind of air tightness test frock for unthreaded hole interface shape valve body according to claim 1, it is characterized in that: described piston rod (1) has safety and place groove, this is placed safely groove and is communicated with sense channel (12), place in groove in described safety and be provided with a discharge safety valve (8), this discharge safety valve (8) regulates the pressure in sense channel (12), and safety lever (82) one end of this discharge safety valve (8) is connected to the connectivity part that safety places groove and sense channel (12).
7. a kind of air tightness test frock for unthreaded hole interface shape valve body according to claim 2, is characterized in that: also comprise a solenoid valve (7), and this solenoid valve (7) controls the opening and closing driving passage (13).
8. a kind of air tightness test frock for unthreaded hole interface shape valve body according to claim 1, it is characterized in that: the first head bore sidewall of described piston bush (3) is also provided with a photoelectric sensor (9), and the detection side of this photoelectric sensor (9) is to the axis parallel with described piston bush (3).
9. a kind of air tightness test frock for unthreaded hole interface shape valve body according to claim 1, it is characterized in that: the storage tank end face of described piston bush (3) having annular, one end of described shutoff cushion rubber (4) is connected in this storage tank and the cross-sectional diameter of this end is greater than the cross-sectional diameter of these shutoff cushion rubber (4) other parts, has cushion rubber groove (41) around described shutoff cushion rubber (4) madial wall.
10. a kind of air tightness test frock for unthreaded hole interface shape valve body according to claim 1, is characterized in that: the centerline collineation of described first head bore, the first rod aperture, the second head bore, the second rod aperture and piston rod (1).
CN201410613904.1A 2014-11-04 2014-11-04 Air tightness testing tool for valve bodies of unthreaded hole connector types CN104316271A (en)

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CN106353038A (en) * 2016-08-19 2017-01-25 湖北雷迪特冷却系统股份有限公司 External-lock inflatable-type sealing plug

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CN102879156A (en) * 2012-09-17 2013-01-16 中国石油大学(北京) Sealing pressure test method for O-shaped seal rings and sealing device for O-shaped seal rings
CN103278296A (en) * 2013-05-31 2013-09-04 上海嘉倍德塑胶机械有限公司 Device and method for detecting roller leakage
CN103759908A (en) * 2013-12-06 2014-04-30 安徽巨一自动化装备有限公司 Small-hole-diameter closed container decompression detection device
CN104062077A (en) * 2014-06-27 2014-09-24 博益(天津)气动技术研究所有限公司 Connector for detecting sealing performance of medical rubber gloves
CN104165734A (en) * 2014-07-08 2014-11-26 宁波市宇华电器有限公司 End cap for testing ball valve sealing
CN204142443U (en) * 2014-11-04 2015-02-04 天津博益气动股份有限公司 A kind of air tightness test frock for unthreaded hole interface shape valve body
CN204740107U (en) * 2015-03-26 2015-11-04 自贡市佳世特密封制品有限公司 O type sealing washer leak rate detection device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105546112A (en) * 2016-01-14 2016-05-04 安徽江淮汽车股份有限公司 Engine waterway plugging device
CN106353038A (en) * 2016-08-19 2017-01-25 湖北雷迪特冷却系统股份有限公司 External-lock inflatable-type sealing plug

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