CN206710032U - A kind of airtight, the heavy water bulk testing equipment of porous part - Google Patents

Abstract

The utility model discloses a kind of airtight, the heavy water bulk testing equipment of porous part, including air compressor machine, and the compressed air of air compressor machine is successively by the first ball valve, accurate gas gauge, the second ball valve；Also include heavy water tank, the liquid level gauge being additionally provided with tank wall for detecting the depth of water is abutted in heavy water tank；A Rotating Stainless Steel Cage is provided with heavy water tank, the both ends of Rotating Stainless Steel Cage are fixed with rotating shaft, the leak detection tool equipment for installing part is placed with Rotating Stainless Steel Cage；The first sealing gasket is provided with the inclined hole of part, the first sealing gasket is clamped by first clamping plate and second clamping plate；Ventilation bottom plate is provided with step groove, and the air flow channel communicated with each blind hole is formed on stomata cover plate and step groove bottom；Stopper is additionally provided with air flow channel.The frock disposably can not only hunt leak to all blind holes, one by one can also carry out leak detection to blind hole, be easy to safeguard.

Description

A kind of airtight, the heavy water bulk testing equipment of porous part

Technical field

The utility model belongs to part inspection for leakage technical field, more particularly to a kind of end face is provided with the part of multiple blind holes Airtight, heavy water bulk testing device.

Background technology

In product manufacturing production, it will usually which some needs are contacted or stored with the hole of such as hydraulic oil, fuel, lubricating oil Either the part of groove etc. carries out sealing detection, verifies it under certain pressure intensity, whether there is crack or other infringements in blind hole, In order to avoid seepage occurs when in use.Such as a kind of part shown in Fig. 1, it is rectangular-shape, one end is provided with the first blind hole 101st, the second blind hole 102, the 3rd blind hole 103, and the first blind hole 101 is communicated by inclined hole 104 with the external world, and use is additionally provided with part In the bolt hole 105 and dowel hole 106 of installation part.Leak detection to such part at present be usually each hole one by one with leak detection System is connected, and leak detection medium is typically source of the gas, although very simple in principle, convenient to carry out, each Kong Junyu sources of the gas are straight Connect connected so that whole system pipeline interlocks, and valve and pressure gauge are numerous, it is difficult to safeguards potential safety hazard easily occur；And adopt With heavy water test, then often there are bubble unobvious, or due to being sunken to bottom, it is impossible to more easily see each inspection of part Survey the bubbling situation at position.In addition, the liquid pressure size of a certain position is relevant with the water depth in water, i.e. P=ρ gh, It is important that it is exactly the pressure values matching degree of heavy water depth and extraneous compressed gas source when doing heavy water test, existing heavy water examination This factor is have ignored in testing mostly, is merely thought, as long as not having, bubble then part of emerging is lossless, but when heavy water is too deep, especially Some rust-inhibiting materials are the increase in, after improving fluid density, the pressure to be sunk due to part at water is excessive, and compressed gas is tiny Trachoma, be difficult to relatively freely escape in gap, cause bubble to escape unobvious, especially when pressure testing value is very low in itself and zero Very hour, bubble effusion are got over unobvious and can not possibly even escaped again in the crack of part, then cause seamless lossless detection false As although in view of for possible experiment depth, the liquid pressure of usual test point will not be very big, still is possible to exist The deeper situation of depth is tested, for example is large scale either pipe part；For in theory, no matter which kind of part, detection be situated between The liquid pressure of matter all has a certain degree of interference effect to the bubble effusion of part in itself, and such case is for Non-Destructive Testing It is required that higher high precision part is especially prominent.And can not be the bigger the better for testing pressure, gas pressure test band in itself There is very big danger, on the premise of technological requirement is met less atmospheric pressure value should be selected to be tested.

Utility model content

The purpose of this utility model is solve above-mentioned technical problem, there is provided a kind of airtight, the heavy water mixing of porous part Testing equipment, the frock disposably can not only be hunted leak to all blind holes, and multiple blind holes (groove) one by one can also be entered Row leak detection, while the heavy water test of air-tightness and comprehensive observation is carried out, the two result is verified mutually, whole leak detection system Simple and compact, it is easy to safeguard, operation flexibility is strong；And the heavy water depth of part can be detected in real time, tried with timely reasonable adjusting Pressure value.

The technical solution of the utility model is as follows：

A kind of airtight, the heavy water bulk testing equipment of porous part, including air compressor machine, the compressed air of the air compressor machine are led to Piping is successively by the first ball valve, accurate gas gauge, the second ball valve；Also include the heavy water tank opened wide at top, described The bottom of heavy water tank is provided with outlet pipe, and the delivery port of the outlet pipe is connected with flowing water Valve, the flowing water Valve and cyclic water tank phase Even, the return pipe communicated with the heavy water tank is provided with cyclic water tank, the return pipe is provided with pump；In the heavy water tank The liquid level gauge for detecting the depth of water is additionally provided with tank wall；A Rotating Stainless Steel Cage, the stainless steel are provided with the heavy water tank The both ends of cage are respectively fixed with the rotating shaft being connected with reducing gear, and the rotating shaft passes outwards through respectively to be arranged in heavy water tank tank wall Felt circle and rolling bearing, so that the Rotating Stainless Steel Cage is horizontal in heavy water tank, be placed with Rotating Stainless Steel Cage for installing The leak detection tool equipment of part；

The leak detection tool equipment includes the first sealing gasket for being located at inclined hole porch on part left side wall, on right side wall with The opening position that first sealing gasket faces is provided with rubber friction pad, first sealing gasket and rubber friction pad respectively byThe arch upward inner surface at position of the first clamping plate of type and the centre of second clamping plate is pushed down, and two clamping plates pass through located at respective both ends Connecting bolt connection tense, the part is held tightly, the first clamping plate is provided with hollow air inlet screwed joint, it is described enter The both ends of gas screwed joint are equipped with pipe screw thread, the pipe screw thread of wherein one end be connected with first clamping plate and with the inclined hole phase It is logical；The other end is connected with second ball valve；

Also include ventilation bottom plate, it is recessed that the ventilation plate upper surface is provided with the stair-stepping ladder from top to bottom to diminish successively Groove, and step groove is from top to bottom closely provided with the second sealing gasket, stomata cover plate and the 3rd sealing gasket, the air-vent cap successively Plate and the groove of step groove bottom minimum form an air flow channel, and the air flow channel is gentle through the second sealing gasket Communicated respectively with each blind hole on part after blind patch；It is additionally provided with the air flow channel for while blocks the second blind hole The first stopper with the 3rd blind hole gas distribution channel, the second stopper for only blocking the 3rd blind hole gas distribution channel；

First stopper and the second stopper include the regulating bolt that thread surface is wound with airtight and watertight padding, For the regulating bolt in the screw-threaded counterbore of the ventilation bottom base plate, regulating bolt from bottom to top is screwed into the ventilation bottom In plate and withstand on the bottom for the flashboard being similarly positioned in ventilation bottom plate, nut and the screw-threaded counterbore in the regulating bolt Plain cushion and the 4th sealing gasket from bottom to top are sequentially provided between step, the flashboard top is closely cased with sealing ring, described The spring pedestal for being weldingly fixed on the stomata cover plate bottom surface is provided with directly over sealing ring, the both ends of spring are separately fixed at spring The spring mounting groove bottom of base and the top of flashboard, when being screwed down the regulating bolt, the flashboard top is opened and made by spring The lower surface of sealing ring and spring pedestal is separated, and when being screwed into the regulating bolt, regulating bolt pushes up the flashboard upwards Place is brought into close contact to the spring mounting groove mouth end face of sealing ring and spring pedestal, so as to block the air flow channel, and it is described When regulating bolt is fully screwed into the screw-threaded counterbore, the flashboard not exclusively skids off the ventilation bottom plate；

All blind hole apertures on the part are all close to second sealing gasket and set, and second sealing gasket is by described in Blind hole orifice edge is all sealed, and the part is located by connecting with ventilation bottom plate by bolt and taper pin, wherein, the bolt is worn It is screwed into after crossing the screwed hole on part on the ventilation bottom plate, the taper pin stretches into described lead to after passing through the dowel hole on part Gas bottom plate.

Further, the top of the flashboard is provided with the boss of rectangular-shape, and length is provided with the step of the boss surrounding Square sealed groove, the half of the sealing ring are embedded in the sealed groove, and second half stretches out the sealed groove；The lock When plate is jacked upwards, the boss can be stretched into the spring mounting groove of spring pedestal and matched somebody with somebody with the spring mounting groove transition Close.

Further, it is connected with the downside of the first clamping plate and second clamping plate for supporting positioning first clamping plate and the second folder The support positioning tube of plate, the bottom of the support positioning tube are in integrally to be provided with Circular Plate, the Circular Plate and the ventilation Bottom plate is coupled using pin, and the tolerance fit between the pin and place pin-and-hole is

Further, groove is symmetrically provided with respectively in the left and right sides wall of part, the groove bottom land in left side is located at The inclined hole porch, first sealing gasket and rubber friction pad are respectively in the groove of the left and right sides.

Further, in addition to the slide rail of the heavy water tank upper end is vertically arranged in, in slide rail towards one inside heavy water tank T-slot is vertically provided with side surface, the slide rail is provided with the clip that is used to clamp liquid level gauge perpendicular with slide rail, described Clip is coupled with the slide rail by T-bolt.

Further, the shaft end in the rotating shaft on the right side of heavy water tank is connected with the wind of zigzag.

Further, the shaft end in the rotating shaft on the left of heavy water tank is provided with shaft coupling, and the shaft coupling can be with The output shaft of the reducing gear is connected；The bottom of the reducing gear is provided with the sliding block of cubic, and the sliding block can be Move back and forth on leading screw in the form of threading action is secondary, the leading screw both ends are arranged in rolling bearing, and wherein one end is provided with hand Wheel.

The beneficial effects of the utility model：The utility model sets special leak detection tool equipment to carry out clamping to part, lead to Gas, detection, leak detection tool equipment are connected by the air inlet screwed joint on inclined hole of component with compressed gas source, and it is blind that compressed gas source enters first In hole, and the air flow channel formed through the second sealing gasket, the laggard blowhole cover plate of stomata cover plate with ventilation bottom plate, the air Runner is communicated with the second blind hole, the 3rd blind hole successively respectively, and compressed gas is sent into the second blind hole, the 3rd blind hole；When first When stopper closes, i.e. when the spring mounting groove mouth end face of sealing ring and spring pedestal is brought into close contact, only the first blind hole is tried Pressure leak detection, observe the situation of change of pressure gauge；After the detection of first blind hole is qualified, opens the first stopper and continue closing second Stopper, now simultaneously to first and second blind hole pressure testing, because the first blind hole has finished after testing, therefore, present pressure gauge Change represents the leak detection result of the second blind hole；Similarly, the second blind hole also detects qualified, then opens the second stopper, now, pressure Contracting gas leads to three blind holes, and because the detection of the first two blind hole finishes, therefore, the result of variations of pressure gauge now is the 3rd The testing result of blind hole.This frock can flexibly select to detect some of which blind hole, without complete according to different detection demands Inspection.

On the other hand, the heavy water tank that the utility model is set can also synchronously do heavy water-stop leak test to part, lead to Cross in observation water and whether emerge bubble to determine whether there is trachoma crack in the blind hole of part, part is put into Rotating Stainless Steel Cage, profit Slowly rotated with rotating shaft to examine bubbling situation with multi-angle；More particularly the utility model is at the heavy inner wall of water tank There is provided liquid level gauge, while Rotating Stainless Steel Cage interference is avoided, can detect the depth of water of any position in heavy water tank.In order to subtract The pressure of small detection medium in itself determines liquid level to influence, the utility model caused by experiment by setting liquid level gauge (depth of water of a certain position), to cut down liquid pressure as far as possible to the interference caused by testing, preferably to select the heavy depth of water Degree and experiment atmospheric pressure value.

Above-mentioned part leak detection tool equipment and there is provided the gas pressure test detecting system of liquid level gauge to complement each other, examination is determined reasonable Pressure value and sink water depth while, its best effect of part leak detection tool equipment competence exertion, make the detection of part more To be quick, accurate.

Brief description of the drawings

Fig. 1 is a kind of structural representation of part.

Fig. 2 is the utility model structure diagram.

Fig. 3 is the top view of the leak detection tool equipment provided with part.

Fig. 4 is A-A sectional views in Fig. 3.

Fig. 5 is the zoomed-in view at the I in Fig. 4.

Fig. 6 is the structural representation when stopper at the I in Fig. 4 is opened.

Fig. 7 is the top view at the step groove on ventilation bottom plate.

Fig. 8 is the top view of stomata cover plate.

Fig. 9 is the sectional view provided with boss, the flashboard of sealed groove and spring mounting seat mounting structure.

Figure 10 is the top view provided with boss, the flashboard of sealed groove.

Embodiment

Embodiment of the present utility model is illustrated by particular specific embodiment below, those skilled in the art can be by this Content disclosed by specification understands other advantages and effect of the present utility model easily.

The utility model is described in further detail with reference to the accompanying drawings and examples：

As shown in Fig. 2 a kind of airtight, the heavy water bulk testing equipment of porous part, including air compressor machine 43, the air compressor machine 43 compressed air is by pipeline successively by the first ball valve 18, accurate gas gauge 19, the second ball valve 20；Also include top Unlimited heavy water tank 21, heavy water tank 21 can be the casing or transparent safety glass case that steel plate surrounds, to see Examine.Outlet pipe is provided with the bottom of the heavy water tank 21, the delivery port of the outlet pipe is connected with flowing water Valve 33, the flowing water Valve 33 are connected by water pipe 34 with cyclic water tank 38, and the return pipe 35 communicated with the heavy water tank 21 is provided with cyclic water tank 38, The return pipe 35 is provided with pump 36；The liquid level gauge being additionally provided with tank wall for detecting the depth of water is abutted in the heavy water tank 21 37；A Rotating Stainless Steel Cage 23 is provided with the heavy water tank 21, the both ends of the Rotating Stainless Steel Cage 23 are respectively fixed with and reducing gear Connected rotating shaft, the rotating shaft pass outwards through the felt circle 26 and rolling bearing 25 being arranged in the heavy tank wall of water tank 21 respectively, from And the Rotating Stainless Steel Cage 23 is horizontal in heavy water tank 21, the leak detection tool equipment for installing part 1 is placed with Rotating Stainless Steel Cage 23 24。

As shown in Fig. 3-8, the leak detection tool equipment 24 includes being located at the porch of inclined hole 104 on the left side wall of part 1 and is provided with the One sealing gasket 2, the opening position faced on right side wall with first sealing gasket 2 are provided with rubber friction pad 3, and described first is close Packing 2 and rubber friction pad 3 respectively byArch upward the inner surface pressure at position for the first clamping plate 4 of type and the centre of second clamping plate 5 Firmly, and two clamping plates couple tension by the connecting bolt 6 located at respective both ends, the part 1 are held tightly, the first clamping plate 4 are provided with hollow air inlet screwed joint 15, and the both ends of the air inlet screwed joint 15 are equipped with the pipe of pipe screw thread, wherein one end Screw thread is connected with first clamping plate 4 and communicated with the inclined hole 104, and the other end is connected with second ball valve 20.Above-mentioned rubber Friction pad 3 is mainly used in increasing frictional force, improves clamping force of the second clamping plate 5 to part 1.

The utility model also includes ventilation bottom plate 7, and ventilation bottom plate 7 upper surface is provided with the rank from top to bottom to diminish successively The step groove of scalariform, and step groove is from top to bottom closely provided with the second sealing gasket 10, stomata cover plate 11 and the 3rd successively The minimum groove in sealing gasket 12, the stomata cover plate 11 and the step groove bottom forms an air flow channel a, the air Runner a communicates with each blind hole on part 1 respectively after passing through 10 gentle blind patch 11 of the second sealing gasket；In the air flow channel It is additionally provided with a for while blocks the first stopper 13 of the second blind hole 102 and the gas distribution channel of the 3rd blind hole 103, only blocks It is blind that second stopper 14 of the gas distribution channel of the 3rd blind hole 103, i.e. the first stopper 13 are located at the first blind hole 101 and second Between the first passage b and the second passage c that hole 102 communicates with air flow channel a, the second stopper 14 is arranged on second Between passage c and the 3rd passage d.

The stopper 14 of first stopper 13 and second includes the regulation that thread surface is wound with airtight and watertight padding Bolt 1301, the airtight and watertight padding can be common unsintered tapes, and the screw thread is kept when mainly being easy to turn regulating bolt 1301 Sealing between connection, the regulating bolt 1301 is in the screw-threaded counterbore of ventilation bottom plate 7 bottom, further to protect Demonstrate,prove the sealing between its screw thread pair, the threaded portion of regulating bolt 1301 and screw-threaded counterbore can be designed to self sealss work( The sealing pipe screw thread of energy, makes it be always maintained at sealing during turning.Regulating bolt 1301 from bottom to top is screwed into described logical In gas bottom plate 7 and the bottom for the flashboard 1304 being similarly positioned in ventilation bottom plate 7 is withstood on, in the nut of the regulating bolt 1301 The sealing gasket 1303 of plain cushion 1302 and the 4th, the flashboard from bottom to top are sequentially provided between the step of the screw-threaded counterbore 1304 tops are closely cased with sealing ring 1305, are provided with directly over the sealing ring 1305 and are weldingly fixed on the stomata cover plate 11 The spring pedestal 1307 of bottom surface, spring pedestal 1307 form with the full weld of stomata cover plate 11, and its weld seam 1308 is through Non-Destructive Testing, no gas Seam, it is non-leakage.The both ends of spring 1306 are separately fixed at the spring mounting groove bottom of spring pedestal 1307 and the top of flashboard 1304, When being screwed down the regulating bolt 1301, as shown in fig. 6, the flashboard 1304 top is opened and makes sealing ring 1305 by spring 1306 It is separated with the lower surface of spring pedestal 1307, when being screwed into the regulating bolt 1301, regulating bolt 1301 is by the flashboard 1304 upward top to the spring mounting groove mouth end faces of sealing ring 1305 and spring pedestal 1307 are brought into close contact place, described so as to block Air flow channel a, and when the regulating bolt 1301 is fully screwed into the screw-threaded counterbore, the flashboard 1304 not exclusively skids off institute State ventilation bottom plate 7.

All blind hole apertures on the part 1 are all close to second sealing gasket 10 and set, second sealing gasket 10 The blind hole orifice edge is all sealed, the part 1 is located by connecting with ventilation bottom plate 7 by bolt 8 and taper pin 9, wherein, The bolt 8 is screwed on the ventilation bottom plate 7 after passing through the screwed hole 105 on part 1, and the taper pin 9 is determined through on part 1 The ventilation bottom plate 7 is stretched into after the pin-and-hole 106 of position.

Further, as shown in Figures 9 and 10, the top of the flashboard 1304 is provided with the boss 130401 of rectangular-shape, institute State and rectangular sealed groove 130403 is provided with the step 130402 of the surrounding of boss 130401, the half of the sealing ring 1305 In the embedded sealed groove 130403, second half stretches out the sealed groove 130403；When the flashboard 1304 is jacked upwards, The boss 130401 can stretch into the spring mounting groove of spring pedestal 1307 and with the spring mounting groove interference fits.It is this Structure design is preferably closed for the ease of stopper, and boss 130401 plays certain with spring mounting groove interference fits Guide effect, make port contact of the sealing ring 1305 preferably with spring pedestal 1307, closure.The half of sealing ring 1305 embeds More firm in sealed groove 130403, sealing ring 1305 can install, stopper closure is more reliable.

Further, as shown in figure 3, the downside of the first clamping plate 4 and second clamping plate 5 is connected with for supporting positioning first The support positioning tube 16 of clamping plate 4 and second clamping plate 5, the bottom of the support positioning tube 16 is in integrally to be provided with Circular Plate, institute State Circular Plate with the ventilation bottom plate 7 using pin 17 to couple, the tolerance fit between the pin 17 and place pin-and-hole isAdopt It is the convenient fixed each folder of installation in order to be easy to support when installing first clamping plate 4 and second clamping plate 5 with support positioning tube 16 Plate, on the other hand, then it is for the ease of by the cooperation spiral shell of the air inlet screwed joint 15 on the arched part of first clamping plate 4 to set up pin 17 Pit aligns with inclined hole 104, and the tolerance fit between pin 17 and place pin-and-hole isIts gap width reaches 0.31~ 0.63mm, above-mentioned mate with threaded holes can be made to be alignd with inclined hole 104 as much as possible, without influenceing the because gap is too small The connection of one clamping plate 4 and the connecting bolt 6 at the both ends of second clamping plate 5 tenses.

Further, groove is symmetrically provided with respectively in the left and right sides wall of part 1, the groove bottom land in left side is located at The porch of inclined hole 104, first sealing gasket 2 and rubber friction pad 3 are located in the groove of the left and right sides respectively, with It is easy to the first sealing gasket 2 and rubber friction pad 3 being pre-set on part 1, more easily installs, clamps.

Further, as shown in Fig. 2 also including the slide rail 39 for being vertically arranged in the upper end of heavy water tank 21, in slide rail 39 T-slot is provided with vertically on the surface towards the side inside heavy water tank 21, and the slide rail 39 is provided with the use perpendicular with slide rail 39 In the clip 40 of clamping liquid level gauge 37, the clip 40 is coupled with the slide rail 39 by T-bolt.Existed with will pass through clip 40 Vertical shift on slide rail 39 adjusts the depth location that liquid level gauge 37 is stretched into heavy water tank 21, to draw the position of part 1 Pressure be it is much, this for large-scale part and it is less experiment air pressure tool is of great significance.

Further, as shown in Fig. 2 the shaft end in the rotating shaft positioned at the heavy right side of water tank 21 is connected with the hand of zigzag Rocking handle 42.To rotate Rotating Stainless Steel Cage 23 manually, part is needed into the position observed closer to operator it can be seen that position, Such as by part there may be crack emerge bubble one end face sink water tank 21 openend.

Further, as shown in Fig. 2 the shaft end in the rotating shaft positioned at the heavy left side of water tank 21 is provided with shaft coupling 27, The shaft coupling 27 can be connected with the output shaft of the reducing gear 28；The bottom of the reducing gear 28 is provided with cubic Sliding block 29, the sliding block 29 can move back and forth on leading screw 30 in the form of threading action is secondary, and the both ends of leading screw 30 are set In rolling bearing 31, wherein one end is provided with handwheel 32.So as to when needing automatic rotating shaft, by the defeated of reducing gear 28 Shaft is mobile and connects with shaft coupling 27, to transmit Rotating Stainless Steel Cage rotation.

The utility model is not limited to the testing inspection of specific part illustrated in fig. 1, to through hole runner, or other The part for needing to detect seepage can be tested using this frock, such as the inspection for through hole, examine through hole hole Whether wall has trachoma defect etc., can block one end of through hole, is transformed to close copy part as shown in Figure 1, carries out Detection.

Above-described embodiment only illustrative principle of the present utility model and its effect are new not for this practicality is limited Type.Any person skilled in the art can all be carried out without prejudice under spirit and scope of the present utility model to above-described embodiment Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the essence disclosed in the utility model God and all equivalent modifications completed under technological thought or change, should be covered by claim of the present utility model.

Claims (7)

1. A kind of 1. airtight, the heavy water bulk testing equipment of porous part, it is characterised in that：Including air compressor machine (43), the pneumatics The compressed air of machine (43) is by pipeline successively by the first ball valve (18), accurate gas gauge (19), the second ball valve (20)； Also include the heavy water tank (21) opened wide at top, outlet pipe, the delivery port of the outlet pipe are provided with the bottom of the heavy water tank (21) Flowing water Valve (33) is connected with, the flowing water Valve (33) is connected with cyclic water tank (38), is provided with and institute in cyclic water tank (38) The return pipe (35) that heavy water tank (21) communicates is stated, the return pipe (35) is provided with pump (36)；It is tight in the heavy water tank (21) By being additionally provided with the liquid level gauge (37) for detecting the depth of water at tank wall；A Rotating Stainless Steel Cage (23) is provided with the heavy water tank (21), The both ends of the Rotating Stainless Steel Cage (23) are respectively fixed with the rotating shaft being connected with reducing gear, and the rotating shaft passes outwards through setting respectively Felt circle (26) and rolling bearing (25) in heavy water tank (21) tank wall, so as to which the Rotating Stainless Steel Cage (23) is horizontal in heavy water In case (21), the leak detection tool equipment (24) for installing part (1) is placed with Rotating Stainless Steel Cage (23)；

   The leak detection tool equipment includes first sealing gasket (2) of inclined hole (104) porch being located on part (1) left side wall, on the right side The opening position faced in side wall with first sealing gasket (2) is provided with rubber friction pad (3), first sealing gasket (2) and Rubber friction pad (3) respectively byThe arch upward inner surface at position of the first clamping plate (4) of type and the centre of second clamping plate (5) is pushed down, And two clamping plates couple tension by the connecting bolt (6) located at respective both ends, the part (1) is held tightly, first folder Plate (4) is provided with hollow air inlet screwed joint (15), and the both ends of the air inlet screwed joint (15) are equipped with pipe screw thread, wherein The pipe screw thread of one end is connected with first clamping plate (4) and communicated with the inclined hole (104), the other end and second ball valve (20) It is connected；

   Also include ventilation bottom plate (7), described ventilation bottom plate (7) upper surface is provided with the stair-stepping ladder from top to bottom to diminish successively Groove, and step groove is from top to bottom closely provided with the second sealing gasket (10), stomata cover plate (11) and the 3rd sealing gasket successively (12), the groove of the stomata cover plate (11) and step groove bottom minimum forms an air flow channel (a), the air Runner (a) communicates with each blind hole on part (1) respectively after passing through the second sealing gasket (10) gentle blind patch (11)；Described The first cut-off for being used for while blocking the second blind hole (102) and the 3rd blind hole (103) gas distribution channel is additionally provided with air flow channel (a) Device (13), the second stopper (14) for only blocking the 3rd blind hole (103) gas distribution channel；

   First stopper (13) and the second stopper (14) include the regulation that thread surface is wound with airtight and watertight padding Bolt (1301), the regulating bolt (1301) is in the screw-threaded counterbore of described ventilation bottom plate (7) bottom, regulating bolt (1301) it is screwed into from bottom to top in the ventilation bottom plate (7) and withstands on the flashboard (1304) being similarly positioned in ventilation bottom plate (7) Bottom, from bottom to top be sequentially provided between the nut of the regulating bolt (1301) and the step of the screw-threaded counterbore flat Pad (1302) and the 4th sealing gasket (1303), flashboard (1304) top are closely cased with sealing ring (1305), the sealing The spring pedestal (1307) for being weldingly fixed on stomata cover plate (11) bottom surface is provided with directly over circle (1305), spring (1306) Both ends are separately fixed at the spring mounting groove bottom of spring pedestal (1307) and the top of flashboard (1304), when being screwed down the regulation During bolt (1301), the flashboard (1304) top is opened and makes sealing ring (1305) and spring pedestal (1307) by spring (1306) Lower surface is separated, and when being screwed into the regulating bolt (1301), regulating bolt (1301) pushes up the flashboard (1304) upwards Place is brought into close contact to the spring mounting groove mouth end face of sealing ring (1305) and spring pedestal (1307), so as to block the air stream Road (a), and when the regulating bolt (1301) is fully screwed into the screw-threaded counterbore, the flashboard (1304) not exclusively skids off institute State ventilation bottom plate (7)；

   All blind hole apertures on the part (1) are all close to second sealing gasket (10) and set, second sealing gasket (10) the blind hole orifice edge is all sealed, the part (1) is fixed by bolt (8) and taper pin (9) with ventilation bottom plate (7) Position connection, wherein, the bolt (8) is screwed on the ventilation bottom plate (7) after passing through the screwed hole 105 on part (1), the cone Pin (9) stretches into the ventilation bottom plate (7) after passing through the dowel hole (106) on part (1).
2. 2. airtight, the heavy water bulk testing equipment of porous part according to claim 1, it is characterised in that：The flashboard (1304) top is provided with the boss (130401) of rectangular-shape, is opened on the step (130402) of boss (130401) surrounding There is rectangular sealed groove (130403), the half of the sealing ring (1305) is embedded in the sealed groove (130403), separately Half stretches out the sealed groove (130403)；When the flashboard (1304) is jacked upwards, the boss (130401) can stretch Enter in the spring mounting groove of spring pedestal (1307) and with the spring mounting groove interference fits.
3. 3. airtight, the heavy water bulk testing equipment of porous part according to claim 1, it is characterised in that：First folder The support positioning tube for supporting positioning first clamping plate (4) and second clamping plate (5) is connected with the downside of plate (4) and second clamping plate (5) (16), the bottom of the support positioning tube (16) is in integrally to be provided with Circular Plate, the Circular Plate and the ventilation bottom plate (7) Coupled using pin (17), the tolerance fit between the pin (17) and place pin-and-hole is
4. 4. airtight, the heavy water bulk testing equipment of porous part according to claim 1, it is characterised in that：In part (1) Left and right sides wall is symmetrically provided with groove respectively, and the groove bottom land in left side is located at the inclined hole (104) porch, and described the One sealing gasket (2) and rubber friction pad (3) are located in the groove of the left and right sides respectively.
5. 5. airtight, the heavy water bulk testing equipment of porous part according to claim 1, it is characterised in that：It is vertical also to include The slide rail (39) of heavy water tank (21) upper end is arranged on, it is vertical on a side surface of the slide rail (39) towards heavy water tank (21) inside Ground is provided with T-slot, and the slide rail (39) is provided with the clip (40) that is used to clamp liquid level gauge (37) perpendicular with slide rail (39), The clip (40) is coupled with the slide rail (39) by T-bolt.
6. 6. airtight, the heavy water bulk testing equipment of porous part according to claim 1, it is characterised in that：In the rotating shaft Shaft end on the right side of heavy water tank (21) is connected with the wind (42) of zigzag.
7. 7. airtight, the heavy water bulk testing equipment of porous part according to claim 1, it is characterised in that：In the rotating shaft Shaft end on the left of heavy water tank (21) is provided with shaft coupling (27), and the shaft coupling (27) can be with the reducing gear (28) Output shaft be connected；The bottom of the reducing gear (28) is provided with the sliding block (29) of cubic, and the sliding block (29) can be Moving back and forth on leading screw (30) in the form of threading action is secondary, leading screw (30) both ends are arranged in rolling bearing (31), its Middle one end is provided with handwheel (32).