CN102607929A - Pneumatic type sample loader - Google Patents

Abstract

A pneumatic sample loader: an air pressure chamber with a piston block inside, a piston rod connected above the piston block, and the piston rod drives the piston block to reciprocate downward and upward in the air pressure chamber; the air pressure chamber The lower end is connected to the first fixed pressure cap, and the bottom of the first fixed pressure cap is connected to the storage room; the first fixed pressure cap is provided with a first tapered groove and a second tapered groove, wherein the first tapered groove penetrates the air pressure chamber and the storage chamber, the taper mouth of the first taper groove is facing the air pressure chamber; the second taper groove is connected to an air passage, and the taper mouth of the second taper groove is facing the storage chamber; a Spring, wherein the top of the spring in the first tapered groove is against a steel ball to form a one-way air valve from the air pressure chamber to the storage chamber; the bottom of the spring in the second tapered groove is against a steel ball to form a one-way air valve from the air pressure chamber to the atmosphere. Air valve; the lower port of the storage chamber is provided with a second fixed pressure cap, and a rubber sleeve is clamped between the second fixed pressure cap and the storage chamber.

Description

A pneumatic sample loader

technical field

The invention relates to a tool for measuring physical and mechanical parameters of rock samples, and more particularly relates to a pneumatic sample loader to facilitate the assembly of rubber-sealed samples in the testing of physical and mechanical parameters of rock samples.

Background technique

In the fields of engineering, energy application and earth science research, it is often necessary to determine the physical and mechanical parameters of rock samples. In the physical and mechanical parameter testing experiments of rock samples under pressure, the samples need to be tightly wrapped with sealing materials to prevent the pressure transmission medium from entering the samples. From the perspective of convenience and economy, rubber sleeves are often used as sealing materials. In practice, when using rubber sleeves to wrap samples, the following problems must be encountered:

1) It is difficult to load the sample. The experimental test requires the rubber sleeve to be close to the sample, so the inner diameter of the rubber sleeve should be smaller than the outer diameter of the sample, so as to use the elasticity of the rubber sleeve to tightly wrap the sample. This leads to the need to stretch the rubber sheath when putting the sample into the rubber sheath, often by forcing it in, but this method is relatively laborious. The rubber sleeve used in practice often needs a certain thickness to meet the requirements of maintaining certain physical and mechanical properties under temperature and pressure, so it will be more laborious to squeeze the sample into a thick rubber sleeve;

2) If the structure of the sample is relatively weak, it is easy to crush the sample if the pressure is too large when loading the sample.

Contents of the invention

The object of the present invention is to provide a pneumatic sample loader to improve the defects in the known technology.

In order to achieve the above object, the pneumatic sample loader provided by the present invention mainly includes:

A pneumatic chamber with a piston block inside, a piston rod is connected above the piston block, and the piston rod drives the piston block to reciprocate downward and upward in the air pressure chamber;

The lower end of the air pressure chamber is connected to the first fixed pressure cap, and the bottom of the first fixed pressure cap is connected to the storage chamber;

The first fixed pressure cap is provided with a first taper groove and a second taper groove, wherein the first taper groove passes through the air pressure chamber and the storage chamber, and the taper opening of the first taper groove faces the air pressure chamber; the second taper groove connects an air Road, the tapered opening of the second tapered groove faces the storage chamber;

A spring is provided in both the first tapered groove and the second tapered groove, wherein the upper part of the spring in the first tapered groove bears against a steel ball to form a one-way air valve from the air pressure chamber to the storage chamber;

The bottom of the spring in the second taper groove is against a steel ball to form a one-way air valve from the air pressure chamber to the atmosphere;

The lower port of the storage chamber is provided with a second fixed pressure cap, and a rubber sleeve is sandwiched between the second fixed pressure cap and the storage chamber.

In the pneumatic sample loader, an upper gland is fixed on the upper end of the air pressure chamber to prevent the piston block from moving upwards and detaching from the air pressure chamber, and the piston rod extends out of the upper gland.

In the pneumatic sample loader, the upper and lower surfaces of the piston block are provided with sealing rings, which are connected with the piston rod together with the piston block to form an integral body.

In the pneumatic sample loader, a sealing ring is provided between the storage chamber and the first fixed pressure cap, so that the end surface of the storage chamber and the first fixed pressure cap are in a sealed state.

In the pneumatic sample loader, the springs of the first tapered groove and the second tapered groove in the first fixed pressure cap are fixed by fixed air-permeable nuts.

In the pneumatic sample loader, one end of the storage chamber holding the rubber sleeve is a tapered surface.

The pneumatic sample loader, wherein the outlet of the rubber sheath is provided with a sealing clip.

The air pressure sample loader provided by the present invention expands the inner diameter of the rubber sheath by air pressure in actual operation to facilitate the entry of the sample into the rubber sheath, realizes the non-destructive assembly of the sample, and solves the assembly problem of the rubber sheath sealed sample.

Description of drawings

Fig. 1 is a schematic structural view of a pneumatic sample loader of the present invention.

Fig. 2 is a left side view from the direction shown in Fig. 1, showing a schematic diagram of the rotation of the pneumatic sample loader of the present invention during sample loading.

Explanation of component names in the attached drawings:

1 upper gland, 2 piston block, 3, 7 sealing ring, 4, 20 steel ball, 5, 19 spring, 6, 18 fixed breathable nut, 8 first fixed pressure cap, 9, 13 probe, 10 storage room, 11 Sample, 12 second fixed pressure cap, 14 rubber sleeve, 15 sealing clip, 16 piston rod, 17 air chamber, 21 fastening handle, 22 fixing bolt, 23 rotating disc, 24 fixing bracket, 25 fastening bolt, 26 air channel .

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

Please refer to FIG. 1 , the pneumatic sample loader of the present invention is basically composed of two parts: a pneumatic chamber 17 and a storage chamber 10 .

The air pressure chamber 17 is equipped with an upper gland 1, a piston block 2, a sealing ring 3, a steel ball 4, a spring 5, a fixed ventilating nut 6, a first fixed pressing cap 8, a piston rod 16, a fixed ventilating nut 18, a spring 19, a steel ball 20.

The upper gland 1 is fastened on the air pressure chamber 17 to prevent the piston block 2 from moving upwards and disengaging from the air pressure chamber 17 . The piston block 2 is placed in the air pressure chamber 17, and is connected with the sealing ring 3 and the piston rod 16 to form a whole to perform downward and upward reciprocating movements to perform air compression and suction work. The first fixed pressure cap 8 is provided with a first tapered groove through the air pressure chamber and the storage chamber, the steel ball 4 is placed in the first tapered groove of the first fixed pressure cap 8, and the taper opening of the first tapered groove faces the air pressure In the chamber 17, the spring 5 is placed in the first tapered groove of the first fixed pressure cap 8 to withstand the steel ball 4 from below, and the fixed breathable nut 6 is placed in the first tapered groove of the first fixed pressure cap 8, between the steel ball 4 and The bottom of the spring 5 withstands the spring 5 and makes them into a whole, which plays the role of fixing the steel ball 4 and the spring 5. Under the action of the spring 5 and the fixed air-permeable nut 6, the steel ball 4 can be topped to seal the taper opening of the first taper groove. When the piston block 2 is connected with the sealing ring 3 and the piston rod 16 to form a whole to compress air downward, the steel ball 4 opens the taper opening of the first taper groove under the pressure of the air, and the compressed air enters the storage chamber 10 . When the piston block 2 is connected with the seal ring 3 and the 16 piston rod to move upwards as a whole, the air pressure decreases, and the spring 5 will support the steel ball 4 again to seal the taper opening of the first taper groove, forming a pressure chamber from the air pressure chamber 17 to the storage tank. The one-way air valve of object chamber 10.

The first fixed pressure cap 8 is also provided with a second tapered groove, which communicates with the outside atmosphere through an air passage 26, and the tapered mouth of the second tapered groove faces the direction of the storage chamber 10, and fixes the breathable nut 18 and the spring. 19 and the steel ball 20 are placed together in the second tapered groove, and the bottom of the tapered groove is downward at a 90-degree right angle and passes through the air passage 26 to communicate with the outside world. Under the action of spring 19 and fixed vent nut 18, steel ball 20 seals the taper mouth of the second taper groove downwards. When piston block 2 is connected with sealing ring 3 and piston rod 16 to form a whole to compress air downward, steel ball 4 will Open down, the compressed gas enters the storage chamber 10, at this time the steel ball 20, under the action of the spring 19 and the fixed breathable nut 18, seals the second tapered groove and the passage of the air passage 26 leading to the outside, forming a single passage between the air pressure chamber 17 and the atmosphere. to the air valve.

The first fixed pressure cap 8 is the base of the air pressure chamber 17 and also the fixed pressure cap of the storage chamber 10 . When the first fixed pressure cap 8 is threaded with the air pressure chamber 17, it must be wrapped around the air pressure chamber 17 threads with polytetrafluoroethylene tape to play a sealing effect.

The storage chamber 10 is equipped with a first fixed pressure cap 8 , probes 9 and 13 , a sample 11 , a second fixed pressure cap 12 , rubber sleeves 14 , 15 sealing clips.

The probes 9 and 13 are placed in the storage chamber 10, and the sample 11 is placed between the two control heads 9 and 13. The second fixed pressure cap 12 is connected with the external thread on the bottom of the storage chamber 10 through its own internal thread, and simultaneously presses the rubber sleeve 14 on the tapered surface at the bottom of the storage chamber 10 . The taper at the bottom of the second fixed pressure cap 12 is the same as that at the bottom of the storage chamber 10. Tighten the second fixed pressure cap 12 to push down the rubber sleeve 14 that is enclosed within the tapered surface at the bottom of the storage chamber 10 to play the role of fixing and sealing. The outlet of rubber sheath 14 is equipped with sealing card 15, and the effect of sealing card 15 is to have the export sealing of rubber sheath 14 of certain length to block.

As the compressed air in the air pressure chamber 17 is continuously injected, the inner diameter of the rubber sheath 14 is continuously expanded and extended, providing enough space for the probe 9, the sample 11 and the probe 13 to enter the rubber sheath 14 smoothly. After the probe 9, the sample 11 and the probe 13 enter the rubber sheath 14, the second fixing cap 12 is released to take off the rubber sheath 14, and the sample loading process is completed.

The pneumatic sample loader of the present invention is also provided with a rotating disk 23 , which is rotatably fixed on a fixed bracket 24 and fixed on the workbench by the fixed bracket 24 .

The tightening handle 21 is screwed on the fixing bolt 22, and the fixing bolt 22 passes through the groove on the fixing bracket 24 and is tightened with the rotating disk 23 to form an integral body. The rotating disk 23 passes through the central hole of the fixed bracket 24, and the diameter of the small head of the rotating disk 23 is welded with the outer middle position of the storage chamber 10 to form a whole. When the storage chamber 10 is rotated, the rotating disk 23 is driven to move synchronously, as shown in FIG. 2 As can be seen in the figure, the fastening handle 21 can be used to tighten the fastening handle 21 on the panel of the fixed bracket 24 when the storage compartment 10 is rotated. Fastening bolt 25 passes the bottom groove of fixed support 24, and fixed support 24 is supported with fastening bolt 25 rotations when being fixed on the table. When loading the sample, the fixing bolt 22 is loosened, the pneumatic sample loader is rotated to be horizontal, and after the sample is loaded, the pneumatic sample loader is rotated to be vertical, and the pressurization process starts. The direction of rotation is indicated by the arrow in Figure 2.

Claims (7)

1. vapour-pressure type sample sample charging device mainly includes:

One air-pressure chamber, piston block is equipped with in inside, and this piston block top connects a piston rod, drives piston block by piston rod and in air-pressure chamber, does downwards and the to-and-fro movement that makes progress;

The lower end of this air-pressure chamber connects the first fixing pressure cap, this first fixing below connection material storage room of pressure cap;

First fixedly pressure cap be provided with the first tapering groove and the second tapering groove, wherein first tapering groove connects air-pressure chamber and material storage room, the tapering mouth of the said first tapering groove is towards air-pressure chamber; The second tapering groove connects an air flue, and the tapering mouth of the said second tapering groove is towards material storage room;

Be equipped with a spring in the first tapering groove and the second tapering groove, wherein a steel ball is replaced in the top of the spring in the first tapering groove, forms the Non-return air valve by air-pressure chamber to material storage room;

A steel ball is replaced in spring below in the second tapering groove, forms the Non-return air valve of air-pressure chamber to atmosphere;

The lower port of material storage room is provided with the second fixing pressure cap, this second fixing clamping one rubber case between pressure cap and the material storage room.

2. vapour-pressure type sample sample charging device according to claim 1, wherein, the upper end of air-pressure chamber is fixed with a upper press cover, prevents that piston block from moving upward and breaks away from from air-pressure chamber, and piston rod extends this upper press cover.

3. vapour-pressure type sample sample charging device according to claim 1, wherein, the upper and lower surface of piston block is equipped with O-ring seal, is connected to form an integral body with piston block and piston rod.

4. vapour-pressure type sample sample charging device according to claim 1, wherein, material storage room and first fixedly is provided with O-ring seal between the pressure cap, makes the end face and first of material storage room fixedly be sealing state between the pressure cap.

5. vapour-pressure type sample sample charging device according to claim 1, wherein, first fixedly in the pressure cap spring of the first tapering groove and the second tapering groove fix by the fixed ventilation nut.

6. vapour-pressure type sample sample charging device according to claim 1, wherein, an end of material storage room's clamping rubber case is a tapering face.

7. vapour-pressure type sample sample charging device according to claim 1, wherein, the outlet of rubber case is provided with the sealing clamp.

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