CN203025002U - Rotating pressure valve type undisturbed soil sampler - Google Patents
Rotating pressure valve type undisturbed soil sampler Download PDFInfo
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- CN203025002U CN203025002U CN 201220699379 CN201220699379U CN203025002U CN 203025002 U CN203025002 U CN 203025002U CN 201220699379 CN201220699379 CN 201220699379 CN 201220699379 U CN201220699379 U CN 201220699379U CN 203025002 U CN203025002 U CN 203025002U
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- cavaera
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Abstract
The utility model provides a rotating pressure valve type undisturbed soil sampler. One end of a soil sampling tube positioned on the soil sampling part of the soil sampler is connected with a waste soil chamber through a screw thread, and the other end of the soil sampling tube is connected with a cutting edge through the screw thread; the soil sampling tube is internally provided with a soil sample lining barrel; the upper end and lower end of the bushing of a sealing device part are respectively connected with the waste soil chamber and a valve seat through screw threads; the upper end of a valve is connected with the screw hole of a valve chamber; the screw hole and a vent hole are concentrically configured and screwed on the valve seat; the bottom end of the valve chamber is connected with a press cover through the screw thread to prevent a spring and the valve from being dropped; and the upper end of the valve chamber is provided with a connector. The rotating pressure valve type undisturbed soil sampler provided by the utility model can be used for enhancing the sealing effect on a soil sample, changing the phenomenon that the sealing is unstuck when sand grains are clamped at the middle of the valve and the valve seat, improving the sampling rate of undisturbed soil samples to more than 95% and sampling the deep undisturbed structure soil samples, is suitable for the modes of static pressure soil sampling and heavy-punch less-hitting soil sampling and can be used for sampling the second-level and third-level undisturbed soil samples and suitable for sampling the soft soil, the clay soil, the silty soil and the sandy soil.
Description
Technical field
The utility model relates to industry and the engineering geological investigation in the fields such as covil construction, port construction, the railway construction technology that fetches earth, and particularly is applied in the prospecting of marine site, can take the rotation pressure valve formula undisturbed soil sampler of two, three grades of undisturbed soil samples.
Background technology
Follow traditional engineering geological investigation and take the undisturbed soil sample method, form by fetch earth pipe and roach chamber, but the hermetically-sealed construction on top is different, common restricted ball-valve type seals, simple and easy valve formula alive and on put forward valve formula alive and seal three kinds of forms.During soil sample is subject to comprising boring in lifting process in boring, the impact of the suffered pull of vacuum in water column pressure, atmospheric pressure and soil sample lower end, so whether soil sample barrel sealing device for upper portion of annular performance is good, be the key of soil sample taking rate.
Soil sample barrel is in sampling process during ball valve in restriction, and the liquid in soil sample barrel, gas are discharged ball jack-up, when stopping taking a sample, because the effect of ball upper springs pushes back former valve seat position, to play sealing function.Owing in boring, the grains of sand often being arranged, lose sealing effectiveness when being stuck between ball and ball valve, the soil sample taking rate is generally in 60 ~ 75% left and right.
Simple and easy valve alive and on carry valve type soil sampler alive and generally adopt on valve seat and the valve of living and propose sealing, this sealing effectiveness is better, but when having the larger grains of sand and foreign material to be stuck in valve surface of contact alive, valve alive and valve seat can't rely on the effect of lifting with its removal, namely easily lose sealing property, cause coming off of soil sample, the soil sample taking rate is generally in 80 ~ 90% left and right.
Summary of the invention
For solving the problem that exists in above-mentioned technology, the utility model provides a kind of rotation pressure valve formula undisturbed soil sampler, is that a cavaera that can rotate is set in sealing device for upper portion of annular, and valve adopts the linear contact of taper surface with contacting of valve seating.Valve and valve seating back down under water, atmospheric pressure in pipe when taking soil sample, guarantee the discharge that roach pipe interior water, gas, mud can be more unobstructed, the rear swivel of the end of fetching earth, drive cavaera rotatably compress, when running into the grains of sand and foreign material, foreign material can be squeezed under the effect of turning moment and downforce and open, guarantee the sealing effectiveness of valve and valve seating.
For achieving the above object, the technical scheme that the utility model adopts is to provide a kind of rotation pressure valve formula undisturbed soil sampler, and wherein: this soil sample barrel includes fetch earth part, packoff part; Describedly fetch earth that part includes cutting edge, the pipe that fetches earth, roach chamber, an end of the pipe that fetches earth is connected with the roach chamber by screw thread, the other end is connected with cutting edge by screw thread, and the lining bucket of soil sample is housed in the pipe that fetches earth.
Described packoff partly includes valve, gland, pivot pin, spring, joint, valve seating, cavaera, bushing; The two ends up and down of bushing are respectively by screwed connection roach chamber and valve seating, and there is an air hole lower end of valve seating, and valve contacts sealing with air hole, and there are the screw that connects cavaera, screw and air hole concentric arrangement in the valve upper end; The cylindrical hollow form of cavaera is twisted and to be connected on valve seating, in-built valve, spring and pivot pin, and the cavaera bottom prevents that by the screwed connection gland spring and valve from coming off, and in the cavaera upper end, one joint is arranged.
Effect of the present utility model is to adopt rotation pressure valve formula undisturbed soil sampler packoff, increased the sealing effectiveness to soil sample, changed the malfunctioning phenomenon of sealing when having sand grains to be clipped in valve and valve seating centre, improved the effect of taking of undisturbed soil sample, taking rate can reach more than 95%, also can be used for taking deep layer original state structure soil sample.Be applicable to static pressure fetch earth and weight hit less the mode of fetching earth, can take two, three grades of undisturbed soil samples, can adapt to the sampling of weak soil, cohesive soil, silt and sand.
Description of drawings
Fig. 1 is rotation pressure valve formula soil sample barrel principle of work schematic diagram of the present utility model.
In figure:
1. valve 2. gland 3. pivot pin 4. spring 5. joint 6. valve seatings
7. pipe 11. cutting edge 12. valve stems fetch earth in cavaera 8. bushing 9. roach chambers 10.
Embodiment
By reference to the accompanying drawings the utility model rotation pressure valve formula undisturbed soil sampler structure and working method are described further.
The design philosophy of the utility model rotation pressure valve formula undisturbed soil sampler is that the top seal mode with conventional open soil sampler changes rotation pressure valve formula into, utilize a valve that can rotatably compress sealing to seal the interior soil sample of pipe that fetches earth, hydraulic pressure and atmospheric pressure in boring are not acted directly on the style that fetches earth, and can guarantee effective sealing.
As shown in Figure 1, rotation pressure valve formula undisturbed soil sampler of the present utility model, this soil sample barrel include fetch earth part, packoff part.The described part that fetches earth includes cutting edge 11, the pipe 10 that fetches earth, roach chamber 9, and an end of the pipe 10 that fetches earth is connected with roach chamber 9 by screw thread, and the other end is connected with cutting edge 11 by screw thread, fetches earth and manages the lining bucket that soil sample is housed in 10.
Described packoff partly includes valve 1, gland 2, pivot pin 3, spring 4, joint 5, valve seating 6, cavaera 7, bushing 8; By screwed connection roach chamber 9 and valve seating 6, there is an air hole lower end of valve seating 6 respectively at the two ends up and down of bushing 8, and valve 1 contacts sealing with air hole, and there are the screw that connects cavaera 7, screw and air hole concentric arrangement in valve 1 upper end; The cylindrical hollow form of cavaera 7 is twisted and to be connected on valve seating 6, in-built valve 1, spring 4 and pivot pin 3, and cavaera 7 bottoms prevent that by screwed connection gland 2 spring and valve from coming off, and in cavaera 7 upper ends, one joint 5 are arranged.
The corresponding surface of contact of described valve 1 and valve seating 6 is the arc conical surface.Described valve 1 upper end is provided with pivot pin 3, spring 4, can make valve and valve seating close contact by spring compression.
As shown in Figure 1, rotation pressure valve formula soil sample barrel of the present utility model comprises the drawing out soil equipment that is comprised of the pipe that fetches earth, roach chamber 9 and cutting edge.Pipe 10 structures that fetch earth are half box-like for dividing, and an end is connected with roach chamber 9 with screw thread, and the other end is connected with cutting edge 11 with screw thread, and in-built soil sample serves as a contrast barrel, need only when unloading soil cutting edge 11 9 is backed out from the roach chamber, and fetching earth of will narrowing managed 10 and opened, and can take out soil sample.Cutting edge 11 is provided with two types, with the cutting edge 11 of thin-walled, can reduce the disturbance to soil sample when taking weak soil; Use the cutting edge 11 of heavy wall when taking cohesive soil, silt, sand, in order to increase the intensity of cutting edge.Valve 1, valve seating 6, pivot pin 3, spring 4, gland 2, cavaera 7, bushing 8 form packoff, bushing 8 is connected with roach chamber 9, valve seating 6 by screw thread, on cavaera 7 tops, an interior screw thread opening is arranged, in order to jointing 5 parts, the upper end of joint 5 is connected with drilling rod, joint 5 lower ends connection cavaeras 7; There is the outboard square-like screw thread cavaera lower end, is screwed on valve seating 6; The drilling rod that turns clockwise after finishing that fetches earth drives synchronous rotation of joint, cavaera and tightens screw thread and valve 1 can be pressed on valve seating 6.Valve is divided into the valve stem 12 on valve 1 and top, and valve stem 12, pivot pin 3, spring 4 are arranged in the pipe of cavaera 7 lower ends.One circular perforations is arranged at valve stem 12 tops, and pivot pin 3 is through in the valve perforation and fixes, and the width of pivot pin is slightly larger than the diameter of valve stem 12, the elastic force of spring 4 can be passed on valve 1, can also be stuck in and prevent on gland 2 that air-stop gate comes off.Valve 1 adopts 3cr13 materials processing, and remaining part all adopts No. 45 steel and geology tubing.
After machining, the utility model rotation pressure valve formula undisturbed soil sampler should test, the concrete method of inspection is that soil sample barrel is inverted, screw valve 1 water filling in the soil sample barrel, valve 1 place must not leak, as leak and again to grind valve 1 and valve seating 6, to check also whether valve 1 and valve seating 6 be concentric, should change parts as decentraction.
Under with described soil sample barrel at the bottom of hand-hole before, valve and valve seating are left certain interval, when fetching earth after soil sample enters the pipe that fetches earth, the water and air on soil sample top upwards jack-up valve, valve stem and Compress Spring under water, gas pressure, water and air is discharged by valve and valve seat gap.The drilling rod that turns clockwise after complete that fetches earth just can compress valve 1 and valve seating 6.
Should be according to the Different Strata valve gap adjustment.At soft soil layer, should rotate counterclockwise cavaera 7 before fetching earth, make valve 1 slightly contact or stay 3 ~ 5mm gap with valve seating 6, rotary drill rod is tightened valve 1 again after the end of fetching earth.Should be in advance when competent formation fetches earth with valve 1 and valve seating 6 close contact slightly, prevent that joint is connected insecure with cavaera 7 and comes off, because valve 1 compresses by spring 4, gas and water still can be discharged, spring pressure approximately is equivalent to the pressure on stratum more than 2 meters, can not affect soil sampling mass.
The stopple coupon of this soil sample barrel is identical with conventional soil sample barrel with the roach chamber, meets code requirement.Adopt valve, valve seating and cavaera to form seal cavity on the top of fetch earth pipe and roach pipe, make formation vacuum state in the pipe that fetches earth by tightening valve and valve seating when fetching earth, guarantee that soil sample can not come off in the process that proposes boring.When taking soil sample, go for the few striking sampling of static pressure method and weight, soil sample is pressed into or is driven into fetch earth after pipe, the drilling rod that is connected with soil sample barrel that turns clockwise just can be pressed on valve on valve seating.Valve is connected with joint by a pivot pin, can not separate with valve seating because vibrations cause valve in putting forward the brill process, the surface of contact of valve and valve seating is the conical surface of an arc, when the large grains of sand, foreign material are arranged at the bottom of the hole, the rotation of valve can be squeezed it and be opened, and has avoided other soil sample barrels recurrent because of the poorly sealed soil sample obscission that causes.
Rotation pressure valve formula undisturbed soil sampler of the present utility model is applicable to different soil layer samplings.During use, regulate the gap of valve and valve seating for different soil properties, transfer to valve and valve seat gap larger when taking than weak soil matter; When taking than pan soil matter, the valve clearance is transferred to less.
Claims (3)
1. one kind is rotated pressure valve formula undisturbed soil sampler, and it is characterized in that: this soil sample barrel includes fetch earth part, packoff part;
Describedly fetch earth that part includes cutting edge (11), the pipe (10) that fetches earth, roach chamber (9), the end of pipe (10) of fetching earth is connected with roach chamber (9) by screw thread, the other end is connected with cutting edge (11) by screw thread, and the lining bucket of soil sample is housed in the pipe (10) that fetches earth;
Described packoff partly includes valve (1), gland (2), pivot pin (3), spring (4), joint (5), valve seating (6), cavaera (7), bushing (8); The two ends up and down of bushing (8) are respectively by screwed connection roach chamber (9) and valve seating (6), there is an air hole lower end of valve seating (6), valve (1) contacts sealing with air hole, there are the screw of connection cavaera (7), screw and air hole concentric arrangement in valve (1) upper end; The cylindrical hollow form of cavaera (7), twist and be connected on valve seating (6), in-built valve (1), spring (4) and pivot pin (3), cavaera (7) bottom prevent that by screwed connection gland (2) spring and valve from coming off, and in cavaera (7) upper end, one joint (5) are arranged.
2. rotation pressure valve formula undisturbed soil sampler according to claim 1, it is characterized in that: described valve (1) and the corresponding surface of contact of valve seating (6) are the arc conical surface.
3. rotation pressure valve formula undisturbed soil sampler according to claim 1 is characterized in that: described valve (1) upper end is provided with pivot pin (3), spring (4), can make valve and valve seating close contact by spring compression.
Priority Applications (1)
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CN 201220699379 CN203025002U (en) | 2012-12-17 | 2012-12-17 | Rotating pressure valve type undisturbed soil sampler |
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CN 201220699379 CN203025002U (en) | 2012-12-17 | 2012-12-17 | Rotating pressure valve type undisturbed soil sampler |
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CN 201220699379 Expired - Lifetime CN203025002U (en) | 2012-12-17 | 2012-12-17 | Rotating pressure valve type undisturbed soil sampler |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103063467A (en) * | 2012-12-17 | 2013-04-24 | 中交第一航务工程勘察设计院有限公司 | Rotary pressure valve undisturbed soil sampler |
CN103643669B (en) * | 2013-12-25 | 2015-09-09 | 天津水运工程勘察设计院 | For the Apparatus and method for of survey soft soil area on-site sampling |
-
2012
- 2012-12-17 CN CN 201220699379 patent/CN203025002U/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103063467A (en) * | 2012-12-17 | 2013-04-24 | 中交第一航务工程勘察设计院有限公司 | Rotary pressure valve undisturbed soil sampler |
CN103643669B (en) * | 2013-12-25 | 2015-09-09 | 天津水运工程勘察设计院 | For the Apparatus and method for of survey soft soil area on-site sampling |
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Granted publication date: 20130626 |
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CX01 | Expiry of patent term |