CN102313657A

CN102313657A - Mobile piston type natural gas sampling device

Info

Publication number: CN102313657A
Application number: CN201110130585A
Authority: CN
Inventors: 程佳; 吕几凡; 沈文新; 詹志杰; 金岚; 陈赏顺
Original assignee: Zhejiang Province Institute of Metrology
Current assignee: Zhejiang Province Institute of Metrology
Priority date: 2011-05-19
Filing date: 2011-05-19
Publication date: 2012-01-11
Anticipated expiration: 2031-05-19
Also published as: CN102313657B

Abstract

The invention discloses a mobile piston type natural gas sampling device. A piston cylinder is mounted between a front end cover and a rear end cover, a front end cover and a rear end cover are connected through a front guide rod to form a sealed cylinder body, a gas inlet pipeline is formed at the center of the front end cover; an exhausting pipeline and a pressure gauge pipeline, which are parallel to the axial line of the piston cylinder, are formed on the two sides of the front end cover respectively, an exhausting port and a pressure gauge interface are formed on the two side surfaces of the front end cover respectively, a ventilation pipeline which is parallel to the axial line of the piston cylinder is formed in the rear end cover, a ventilation port is formed on the side surface of the rear end cover, a sleeve is mounted on the rear end cover, a piston is placed in the piston cylinder, one end of a piston rod is connected with the piston, the other end of the piston rod extends into the sleeve, one end of a screw rod positioned in the sleeve is in threaded connection with the other end of the piston rod, and the other end of a screw rod extends out of the sleeve via a guide plate hole and a sleeve cover hole and is connected with a rotating handle; and the rotating handle can rotate through the screw rod, the movement of a guide plate is controlled, and the guide plate pushes the piston rod to move forwards. The mobile piston type natural gas sampling device has the characteristics of reliability in working, convenience in operation, high sampling efficiency and the like and is applicable to sampling of natural gas in high-pressure pipelines.

Description

Mobile piston formula rock gas sampling apparatus

Technical field

The present invention relates to the rock gas sampling apparatus, especially relate to a kind of mobile piston formula rock gas sampling apparatus.

Background technology

At present; The on-the-spot movably rock gas sampling thief that uses generally all is the steel cylinder formula at the gas metering station; This sampling thief need use sample gas that it is carried out emptying before use; This operation is not only loaded down with trivial details, and sampling efficiency is low, and the sample gas that remains in the bottle can be brought error to follow-up analytical work.

Mobile piston formula rock gas sampling apparatus; On the basis of general steel cylinder sampling thief, added piston and lead screw device, before sampling, rotated rotary handle to cylinder body foremost piston crown; During sampling; Utilize admission pressure to promote piston and move backward, this device need not the emptying operation before sampling, improved sampling efficiency and gas purity.

Summary of the invention

The purpose of this invention is to provide a kind of mobile piston formula rock gas sampling apparatus, characteristics such as it has, reliable operation, easy to operate, sampling efficiency height are applicable to the sampling of pressure piping rock gas.

In order to achieve the above object, the technical scheme of the present invention's employing is:

Between front end end cover and rear end cap piston cylinder is installed, is connected and composed the cylinder body of sealing between front end end cover and rear end cap through preceding guide rod, the front end end cover center has admission line; The front end end cover both sides have exhausting pipeline and the tensimeter pipeline with the piston cylinder parallel axes, and have drain that is communicated with exhausting pipeline and the pressure gauge connection that is communicated with the tensimeter pipeline in the end cap two sides, have the breather line with the piston cylinder parallel axes in the rear end cap; And have a blow vent that is communicated with breather line in the rear end cap side; Installing sleeve on the rear end cap, piston place in the piston cylinder, and an end of piston rod is connected with piston; The other end of piston rod stretches into sleeve; An end that is positioned at the screw mandrel of sleeve is threaded with the other end of piston rod, and the other end of screw mandrel stretches out outside the sleeve through guiding plate hole and socket cover hole, and is connected with rotary handle; Guide plate is installed in the back-guiding rod, and rotary handle rotates through screw mandrel, and the control guide plate moves, and guide plate promotes piston rod and travels forward.

The relative face of described rear end cap and socket cover is equipped with circular groove, and rear end cap, sleeve and socket cover constitute enclosure space; Linear bearing is installed on the guide plate, and linear bearing cooperates with back-guiding rod.

Be provided with Glais ring in the middle of the described piston side surface, Glais ring piston side surface up and down is equipped with leads wear ring.

Described screw mandrel upper end is installed two angular contact ball bearings and is fixed with bearing cap and socket cover.

The beneficial effect that the present invention has is:

The present invention has characteristics such as reliable operation, easy to operate, sampling efficiency height, is applicable to the sampling of pressure piping rock gas.

Description of drawings

Fig. 1 is a structural principle synoptic diagram of the present invention.

Fig. 2 is a stereographic map of the present invention.

Fig. 3 is the connection layout of front end end cover of the present invention and stop valve and reduction valve.

Among the figure: 1, front end end cover, 1.1, drain, 1.2, exhausting pipeline, 1.3, admission line, 1.4, the tensimeter pipeline, 1.5, pressure gauge connection, 1.6, air intake opening; 2, piston 2,3, piston cylinder, 4, piston rod, 5, rear end cap, 6, sleeve, 7, guide plate; 8, screw mandrel, 9, back-guiding rod, 10, socket cover, 11, rotary handle, 12, bearing cap, 13, angular contact ball bearing; 14, feed screw nut, 15, linear bearing, 16, the screw mandrel head, 17, O-ring seal, 18, lead wear ring, 19, Glais ring; 20, preceding guide rod, 21, stop valve, 21.1, the stop valve air intake opening, 22, reduction valve, 22.1, the reduction valve gas outlet, 22.2, the reduction valve air intake opening.

Embodiment

Below in conjunction with accompanying drawing the present invention is further described.

Like Fig. 1, shown in Figure 2,5 of front end end cover 1 of the present invention and rear end caps are installed

piston cylinder

3,5 cylinder bodies that connect and compose sealing through preceding guide rod 20 of front end end cover 1 and rear end cap; 17 is O-ring seal, and front end end cover 1 center has admission line 1.4, and front end end cover 1 both sides have the exhausting pipeline 1.2 and tensimeter pipeline 1.4 with piston cylinder 3 parallel axes; And have drain 1.1 that is communicated with exhausting pipeline 1.2 and the pressure gauge connection 1.5 that is communicated with tensimeter pipeline 1.4 in end cap 1 two sides, have the breather line 5.2 with piston cylinder 3 parallel axes in the rear end cap 5, and have the blow vent 5.1 that is communicated with breather line 5.2 in rear end cap 5 sides; Installing sleeve 6 on the rear end cap 5; Piston 2 places in the piston cylinder 3, and an end of piston rod 4 is connected with piston 2, and the other end of piston rod 4 stretches into sleeve 6; An end that is positioned at the screw mandrel 8 of sleeve 6 is threaded with the other end of piston rod 4; 16 is the screw mandrel head, and the other end of screw mandrel 8 stretches out outside the sleeve 6 through guide plate 7 holes and socket cover 10 holes, and is connected with rotary handle 11; Guide plate 7 is installed in the back-guiding rod 9, and rotary handle 11 rotates through screw mandrel 8, and control guide plate 7 moves, and guide plate 7 promotes piston rod 4 and travels forward.

Described rear end cap 5 is equipped with circular groove 10.1 with socket cover 10 relative faces, and rear end cap 5, sleeve 6 and socket cover 10 constitute enclosure space; Linear bearing 15 is installed on the guide plate 7, and linear bearing 15 cooperates with back-guiding rod 9.

Be provided with Glais ring 19 in the middle of described piston 3 side surfaces, piston 3 side surfaces of Glais ring about in the of 19 are equipped with leads wear ring 18.

Two angular contact ball bearing 13 usefulness bearing caps 12 are installed in described screw mandrel 8 upper ends and socket cover 10 is fixing, prevent axially-movable.

Principle of work of the present invention is following:

Before sampling, the turn rotary handle 11 at first to the right, and rotary handle control screw mandrel 8 rotates; Screw mandrel 8 drives guide plate 7 and promotes piston rod 4 forward, shifts piston 2 onto extreme position, and then the handle 11 that turns left; Fall back on guide plate 7 backmost when sampling (in order to avoid guide plate piston rod is caused obstructions), during sampling, closed front end covers the drain 1.1 of side; The air intake opening 1.6 of admission line 1.3 is equipped with stop valve 21, external reduction valve 22, and reduction valve gas outlet 22.1 links to each other with stop valve air intake opening 21.1; Reduction valve air intake opening 22.2 links to each other with sampled point, regulates the stop valve 21 at reduction valve 21 device for opening air intake opening place behind the suitable Pressure reducing ratio, and 22 decompressions flow in the sampling cylinder block pipeline gases at high pressure through reduction valve; Piston receives gaseous tension and moves backward; When piston rod falls back on extreme position backward, accomplish sampling, close stop valve 21.

Claims

1. mobile piston formula rock gas sampling apparatus; It is characterized in that: between front end end cover (1) and rear end cap (5) piston cylinder (3) is installed; Connect and compose the cylinder body of sealing between front end end cover (1) and rear end cap (5) through preceding guide rod (20), front end end cover (1) center has admission line (1.4), and front end end cover (1) both sides have exhausting pipeline (1.2) and the tensimeter pipeline (1.4) with piston cylinder (3) parallel axes; And have drain (1.1) that is communicated with exhausting pipeline (1.2) and the pressure gauge connection (1.5) that is communicated with tensimeter pipeline (1.4) in end cap (1) two sides; Have the breather line (5.2) with piston cylinder (3) parallel axes in the rear end cap (5), and have the blow vent (5.1) that is communicated with breather line (5.2), installing sleeve (6) on the rear end cap (5) in rear end cap (5) side; Piston (2) places in the piston cylinder (3); One end of piston rod (4) is connected with piston (2), and the other end of piston rod (4) stretches into sleeve (6), and an end that is positioned at the screw mandrel (8) of sleeve (6) is threaded with the other end of piston rod (4); The other end of screw mandrel (8) stretches out outside the sleeve (6) through guide plate (7) hole and socket cover (10) hole, and is connected with rotary handle (11); Guide plate (7) is installed in the back-guiding rod (9), and rotary handle (11) rotates through screw mandrel (8), and control guide plate (7) moves, and guide plate (7) promotes piston rod (4) and travels forward.

2. require described a kind of mobile piston formula rock gas sampling apparatus according to right 1, it is characterized in that: described rear end cap (5) and the relative face of socket cover (10) are equipped with circular groove, and rear end cap (5), sleeve (6) and socket cover (10) constitute enclosure space; Linear bearing (15) is installed on the guide plate (7), and linear bearing (15) cooperates with back-guiding rod (9).

3. require described a kind of mobile piston formula rock gas sampling apparatus according to right 1, it is characterized in that: be provided with Glais ring (19) in the middle of described piston (3) side surface, Glais ring (19) piston (3) side surface up and down is equipped with leads wear ring (18).

4. require described a kind of mobile piston formula rock gas sampling apparatus according to right 1, it is characterized in that: it is fixing with bearing cap (12) and socket cover (10) that two angular contact ball bearings (13) are installed in described screw mandrel (8) upper end.