CN201289452Y

CN201289452Y - Isolating film piece for cement slurry densitometer

Info

Publication number: CN201289452Y
Application number: CNU2008201410874U
Authority: CN
Inventors: 蒋小春
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-31
Filing date: 2008-10-31
Publication date: 2009-08-12
Anticipated expiration: 2018-10-31

Abstract

The utility model relates to an isolation membrane of a cement slurry densimeter. A putty separator is arranged between a measuring tube of the densimeter and a pressure gauge; a cavity body filled with hydraulic oil is formed in the putty separator; the outer circumferential edge of a fixed flexible isolation membrane inside an annular groove at the front port of the cavity body wraps a support framework made of hard materials; the outer circumferential edge and the support framework are compressed as a whole through a die; and a gap is reserved between the outer side of the isolation membrane and the annular groove and filled with adhesive glue. The isolation membrane avoids corrosion and damage caused by the contact between the slurry and a hard sensor membrane, and dispenses with a large diameter sensor membrane, prevention of transportation damage and the like, thereby further reducing the cost. In addition, the compressed surface at the front side of the membrane with the die has the advantages of natural smoothness, stable performance, and accurate measurement. When in installation, all that is needed is to fill the adhesive glue into the annular groove and press the whole membrane into the glue, excessive glue can flow out of the gas on the outer side of the membrane and fill up the gap, so as to fix and seal the membrane. The replacement is convenient. A boss is formed behind the membrane and is favorable for bonding and sealing. The thickness and diameter of the membrane can enable the membrane to transmit hydraulic pressure, measure accurately and not be easily damaged.

Description

The isolation diaphragm of cement grout density meter

(1) technical field:

The utility model relates to a kind of isolation diaphragm of cement grout density meter, belongs to hydrodynamic pressure and measures class (G01L).

(2) background technology:

Grouting works is the foundation works of a key in fields such as water conservancy and hydropower, construction work, requires to measure the density p of reperfusion serosity in the grouting works with the control water cement ratio.Traditional density measure mode has: 1) nucleon density method: utilize slurries that nuclear radioactive source is sent gamma-ray absorption and survey serum density, advantage is to measure accurately, and shortcoming is that nuclear instrument keeping, transportation and use exist certain limitation, and costs an arm and a leg.2) level altitude fluid column pressure method:, just obtain serum density ρ ∞ L * p after the conversion by measuring the pressure p that level altitude L slurries produce.The cement grout density meter is made up of measuring tube and the pressure gauge that is connected with measuring tube.Advantage is to measure accurate, environmental protection and radiationless; Shortcoming is: 1. cement grout can lump on pressure gauge sensor hard diaphragm in the measuring process, causes measuring error and is difficult to cleaning.2. because cement grout has certain viscosity, pressure gauge sensor hard diaphragm must adopt major diameter, and the problem that this major diameter hard diaphragm exists caking, measuring error too and is difficult to clear up, and major diameter is more expensive than minor diameter, easily breaks in using and transporting.

Chinese patent application, title ' the putty isolator that is used for the cement grout density meter ' (application number 200820109150.6).See Fig. 3, between the measuring tube 5 of cement grout density meter and pressure gauge 8, set up putty isolator 6n, its inner chamber is the cavity 1n that is full of hydraulic oil, and the cavity front port is equipped with flexible isolating diaphragm 2n, and the cavity rear port is connected with pressure gauge 8 pressure transducer front tab 7 and transmits hydraulic pressure.Vertically upwards flow through cement grout 5a in the measuring tube, measuring tube upper end height L fixes.Because the putty isolator adopts flexible isolating diaphragm 2n, the working fluid lower surface can produce fluctuation so cement grout 5a is difficult at diaphragm 2n surface attachment caking, and fluid pressure can be passed to the pressure sensing head of pressure transducer.

See Fig. 3, Fig. 4, flexible isolating diaphragm 2n is equipped with the following step: 1. gluing 4n in putty isolator front end face annular groove 6.1n.2. tighten flexible isolating diaphragm 2n with mould, making it the surface becomes the plane, and buckles in the annular groove 6.1n the circular film periphery is flat.3. adorn mould,, wait for adhesive curing diaphragm pressurization 24 hours.4. steel being pluged with molten metal 3n is lowered to and is pressed in the annular groove on the flexible isolating diaphragm 2n.5. steel plug with molten metal and diaphragm between be coated with grease-proof and waterproof earth rubber 4n again and fix.Above-mentioned flexible isolating diaphragm 2n structure and installation and replacement method exist following defective: i. to tighten diaphragm 2n with mould to make membrane surface become the plane, be difficult to grasp, outside surface very easily produces injustice (seeing 2n ' among Fig. 4), and matrix stretches tight too tightly, the surface is stressed, measures inaccurate; Matrix is pine too, influenced by working fluid, causes data fluctuations.Ii. install pretty troublesome: need curing glue twice, the set-up time is very long.Iii. it is very inconvenient to change diaphragm, need pry open raw steel and plug with molten metal 3n, scrapes and removes photoresist, take out former diaphragm after, newer diaphragm 2n and steel are pluged with molten metal 3n etc. by above-mentioned steps 1.～5. reinstall.

(3) summary of the invention:

The isolation diaphragm of the cement grout density meter that the utility model provides, first purpose is identical with Chinese patent application ' the putty isolator that is used for the cement grout density meter ' (application number 200820109150.6), address the problem: 1. solve in the existing level altitude fluid column pressure method and lump the problem that causes measuring error and be difficult to clear up on the pressure gauge sensor hard diaphragm.2. avoid adopting major diameter sensor diaphragm and the traffic-induced damage that brings.3. reduce cost.Second purpose provides a kind of novel flexible isolation diaphragm, makes to measure accurately, installs and changes conveniently.

Its technical scheme is as follows:

The isolation diaphragm of cement grout density meter is characterized in that:

A) be embedded in mutually in the isolation diaphragm of being made by flexible material 2 in the cement grout density meter putty isolator front end annular groove 6.1 and be enclosed with support frame 3, support frame is positioned at isolation diaphragm 2 neighborings; Support frame adopts hard material, and its hardness is greater than isolation diaphragm;

B) support frame and isolation diaphragm are an integral body with the mould pressure; The front end surface 2.2 that the flexible isolating diaphragm contacts with cement grout 5a is planes;

C) isolation diaphragm 2 outside anchor rings and 6.1 of annular grooves have radial play △ ₄, adhesive glue 4 is filled with annular groove and radial play.

Above-mentioned isolation diaphragm thickness △ ₂Be taken at 0.1～3mm scope, isolation diaphragm diameter D ₂Be taken at 10～100mm scope, can satisfy measurement requirement.Periphery can be established the annular boss made from the diaphragm same flexible material 2.1 on the medial surface of above-mentioned isolation diaphragm.Support frame 3 shape of cross sections are rectangle or circle.Isolation diaphragm 2 profiles are the circular Cui that is, support frame 4 and annular groove 6.1 are the circle that matches with isolation diaphragm 2.The flexible material of making the flexible isolating diaphragm adopts waterproof and oilproof rubber, and hardness is 30～90; Waterproof and oilproof rubber adopts nitrile rubber.The hard material that support frame adopts is steel, aluminium or rigid plastic.Adhesive glue 4 is the grease-proof and waterproof earth rubber.

The utility model beneficial effect:

1. set up the putty isolator between densimeter measurement pipe and pressure gauge, avoid the very thin hard metal diaphragm direct contact water mud liquid on the pressure gauge sensor, very easily burn into damages and changes; Needn't use the major diameter sensor diaphragm, can prevent to damage in the transportation; And then remove to contact cement grout etc. with cheap isolation diaphragm on the putty isolator, all can reduce cost.

2) the putty isolator adopts the flexible isolating diaphragm, the working fluid lower surface can produce fluctuation, when being flow through, cement grout 5a is difficult to adhere to caking at membrane surface, and fluid pressure can be passed to the pressure sensing head, because the pressure that slurries pressure gauge 8 is measured is mean pressure, therefore this fluctuation can not influence measuring accuracy.

3) smooth naturally, the stable performance of whole diaphragm front side surface 2.2 of the band support frame that is extruded by mould can guarantee the hydraulic pressure accuracy of measuring.

4) diaphragm install to be changed very convenient: install only need in groove, fill with glue after, diaphragm is pressed into, unnecessary glue can nature from overflowing between diaphragm outside anchor ring and groove gap and filling up the slit, play the fixedly effect of diaphragm and sealing.And solidify once, the installation replacing time all shortens.

5) diaphragm thickness △ ₂Be taken at 0.1～3mm scope, not only guarantee to measure accurately but also not fragile.Because of general thickness △ 2 selects book, measure accurately, but too the book diaphragm damages easily.

6) diaphragm diameter D ₂Be selected in 10～100mm scope, the measuring accuracy height.As diaphragm diameter D ₂The 10mm measuring accuracy reach 0.5% and more than.

7) annular boss 2.1 is set, helps bonding and sealing.

8) support frame 3 cross sectional shapes are rectangle, are convenient to processing.Circle is selected in the cross section for use, and material is easy to choose or is general.

9) diaphragm material adopts the nitrile rubber of waterproof and oilproof, is difficult for puncturing, distortion and elastic shrinkage be good.

(4) description of drawings:

Fig. 1 the utility model scantling plan and installation site synoptic diagram;

Fig. 2 Fig. 1 K view (both isolation diaphragm 2 front end end views);

Fig. 3 Chinese patent application (application number 200820109150.6) scantling plan and installation site synoptic diagram;

Fig. 4 Fig. 3 K1 view (both isolation diaphragm 2n front end end views).

(5) embodiment:

The following composition of present embodiment cement grout density meter putty isolator:

See Fig. 1, putty isolator 6 inner chambers are provided with the cavity 1 that is used to transmit pressure of filling hydraulic oil, and the cavity front port has annular groove 6.1, in flexible isolating diaphragm 2 is housed, cavity 1 rear port is connected with pressure gauge 8 pressure transducer front tab 7 and transmits hydraulic pressure.Screw thread 6.2 over the putty isolator front port outside is used for being connected with measuring tube 5.See Fig. 1, cavity 1 inside surface is a round table surface, and front end large port diameter D6 is 45mm, rear end portlet diameter d ₆Be 18mm, degree of depth b ₆Be 3mm.

The isolation diaphragm of present embodiment cement grout density meter is composed as follows:

See Fig. 1, Fig. 2, the flexible isolating diaphragm of placing in the annular groove 6.1 that putty isolator front port surface has 2 is for circular, be enclosed with circular annular closed or non-closed support frame 3 in the isolation diaphragm 2, support frame 3 is positioned at isolation diaphragm 2 neighborings, and support frame 3 shape of cross sections are rectangle.It is an integral body that support frame and isolation diaphragm are pressed with mould, and the front end surface 2.2 that the flexible isolating diaphragm contacts with cement grout 5a is planes.Annular groove 6.1 and 2.4 of the anchor rings in the isolation diaphragm outside have radial play △ ₄, adhesive glue 4 is filled with annular groove and radial play.Isolation diaphragm thickness △ ₂Be taken in 0.1～3mm scope, generally get 0.5,1 and 1.5mm all preferable.See Fig. 2, circular isolation diaphragm diameter D ₂Be taken in 10～100mm scope, generally get 30,50 and 80mm all preferable.Periphery is established the annular boss made from the diaphragm same flexible material 2.1 on the medial surface 2.3 of isolation diaphragm, and boss 2.1 adopts three steps.The flexible material of making the flexible isolating diaphragm adopts waterproof and oilproof rubber nitrile rubber, and hardness can be 65～75.Support frame 3 adopts steel loop.Adhesive glue 4 adopts the grease-proof and waterproof earth rubber.

The installation method of present embodiment cement grout density meter isolation diaphragm comprises the steps: 1. to fill with grease-proof and waterproof earth rubber 4 in annular groove 6.1; 2. diaphragm is pressed into, unnecessary glue overflows and fills up the slit from diaphragm outside anchor ring and groove gap △ 4 in the groove; 3. the grease-proof and waterproof earth rubber solidifies, and makes the fixing and sealing of diaphragm, installation.

The replacing method of present embodiment cement grout density meter isolation diaphragm comprises the steps: 1. to cut apart the grease-proof and waterproof earth rubber 4 between isolation diaphragm and annular groove, takes out the overall isolation diaphragm 2 that needs replacing; 2. in annular groove 6.1, fill with grease-proof and waterproof earth rubber 4; 3. will change the new diaphragm in back and be pressed into, unnecessary glue asks that from diaphragm outside anchor ring and groove gap △ 4 overflows and fills up the slit in the groove; 4. grease-proof and waterproof earth rubber 4 solidifies, and makes the fixing and sealing of diaphragm, and replacing is finished.

Claims

1. the isolation diaphragm of cement grout density meter is characterized in that:

A) be embedded in mutually in the isolation diaphragm of being made by flexible material (2) in the cement grout density meter putty isolator front end annular groove (6.1) and be enclosed with support frame (3), support frame is positioned at isolation diaphragm (2) neighboring; Support frame adopts hard material, and its hardness is greater than isolation diaphragm;

B) support frame and isolation diaphragm are an integral body with the mould pressure; The front end surface (2.2) that isolation diaphragm contacts with cement grout (5a) is the plane;

C) between isolation diaphragm (2) outside anchor ring and annular groove (6.1) the radial play Δ is arranged ₄, adhesive glue (4) is filled with annular groove and radial play.

2. by the described diaphragm of claim 1, it is characterized in that the isolation diaphragm thickness deltat ₂Be taken at 0.1～3mm scope.

3. by the described diaphragm of claim 1, it is characterized in that isolation diaphragm diameter D ₂Be taken at 10～100mm scope.

4. by the described diaphragm of claim 1, it is characterized in that periphery is provided with the annular boss made from the diaphragm same flexible material (2.1) on the medial surface of isolation diaphragm.

5. by the described diaphragm of claim 1, it is characterized in that support frame (3) shape of cross section is rectangle or circle.

6. by the described diaphragm of claim 1, it is characterized in that isolation diaphragm (2) profile for circular, support frame (4) and annular groove (6.1) are the circle that matches with isolation diaphragm (2).

7. by the described diaphragm of claim 1, it is characterized in that the flexible material of making flexible isolating diaphragm (2) adopts waterproof and oilproof rubber, hardness is 30～90; The hard material that support frame adopts is steel, aluminium or rigid plastic; Adhesive glue (4) is the grease-proof and waterproof earth rubber.

8. by the described diaphragm of claim 7, it is characterized in that waterproof and oilproof rubber adopts nitrile rubber or fluororubber.