CN202152920U - A mobile piston type natural gas sampling device - Google Patents

Abstract

The utility model discloses a movable piston type natural gas sampling device. A piston cylinder is installed between a front end cover and a back end cover which are connected through a front guide rod to form a sealed cylinder body, a gas inlet pipeline is arranged at the center of the front end cover, a discharge pipeline and a pressure gauge pipeline which are parallel to the axis of the piston cylinder are respectively arranged on two sides of the front end cover, a discharge opening and a pressure gauge connector are arranged on two lateral faces of the front end cover, a ventilating pipeline which is parallel to the axis of the piston cylinder is arranged in the back end cover, a gas vent is arranged on the lateral face of the back end cover, a sleeve is installed on the back end cover, a piston is arranged in the piston cylinder, one end of a piston rod is connected with the piston, the other end of the piston rod stretches into the sleeve, one end of a screw rod is connected with the other end of the piston rod in threaded mode, the other end of the lead screw stretches out of the sleeve through a guide plate hole and a sleeve cover hole to be connected with a rotating handle, the rotating handle rotates through the lead screw and controls movement of a guide plate, and the guide plate pushes the piston rod to move forward. The natural gas sampling device has the advantages of being reliable in working, convenient to operate, high in sampling efficiency and the like, thereby being suitable for sampling of natural gas in high-pressure pipelines.

Description

A mobile piston type natural gas sampling device

technical field

The utility model relates to a natural gas sampling device, in particular to a moving piston type natural gas sampling device. the

Background technique

At present, the movable natural gas samplers used on-site at natural gas metering stations are generally cylinder-type, and this kind of sampler needs to be emptied with sample gas before use. The sample gas in the bottle will bring errors to the subsequent analysis work. the

The mobile piston type natural gas sampling device adds a piston and screw rod device on the basis of the general cylinder sampler. Before sampling, turn the rotary handle to push the piston to the front of the cylinder. When sampling, use the intake pressure to push the piston backward. Movement, this device does not need to be emptied before sampling, which improves sampling efficiency and gas purity. the

Contents of the invention

The purpose of this utility model is to provide a moving piston type natural gas sampling device, which has the characteristics of reliable operation, convenient operation and high sampling efficiency, and is suitable for sampling natural gas in high-pressure pipelines. the

In order to achieve the above object, the technical solution adopted by the utility model is:

The piston cylinder is installed between the front end cover and the rear end cover, and the front end cover and the rear end cover are connected by the front guide rod to form a sealed cylinder body. The vent pipe and the pressure gauge pipe are provided on both sides of the end cover with a vent port connected with the vent pipe and a pressure gauge interface connected with the pressure gauge pipe, and a vent pipe parallel to the axis of the piston cylinder is opened in the rear end cover. The side of the rear end cover is provided with an air vent that communicates with the ventilation pipe. A sleeve is installed on the rear end cover. The piston is placed in the piston cylinder. One end of the inner screw rod is threadedly connected with the other end of the piston rod, and the other end of the screw rod protrudes out of the sleeve through the hole of the guide plate and the hole of the sleeve cover, and is connected with the rotating handle; the guide plate is installed in the rear guide rod, The rotating handle is rotated by the screw rod to control the movement of the guide plate, and the guide plate pushes the piston rod to move forward. the

The opposite surfaces of the rear end cover and the sleeve cover are provided with circular grooves, and the rear end cover, the sleeve and the sleeve cover form a closed space; a linear bearing is installed on the guide plate, and the linear bearing cooperates with the rear guide rod . the

A gray ring is arranged in the middle of the side surface of the piston, and guide and wear-resistant rings are provided on the piston side surfaces above and below the gray ring. the

Two angular contact ball bearings are installed at the upper end of the screw rod and are fixed by a bearing cover and a sleeve cover. the

The beneficial effects that the utility model has are:

The utility model has the characteristics of reliable operation, convenient operation and high sampling efficiency, and is suitable for sampling natural gas in high-pressure pipelines. the

Description of drawings

Fig. 1 is the structural principle schematic diagram of the utility model. the

Fig. 2 is a perspective view of the utility model. the

Fig. 3 is an exploded view of the air inlet of the air inlet pipe of the present invention with a cut-off valve and a pressure reducing valve installed. the

In the figure: 1. Front end cover, 1.1. Vent port, 1.2. Vent pipe, 1.3. Intake pipe, 1.4. Pressure gauge pipe, 1.5. Pressure gauge interface, 1.6. Air inlet, 2. Piston 2, 3. Piston Cylinder, 4, piston rod, 5, rear end cover, 6, sleeve, 7, guide plate, 8, screw mandrel, 9, rear guide rod, 10, sleeve cover, 11, rotary handle, 12, bearing cover, 13. Angular contact ball bearing, 14. Screw nut, 15. Linear bearing, 16. Screw head, 17. Sealing ring, 18. Guide wear-resistant ring, 19. Gray ring, 20. Front guide rod, 21. Cut-off Valve, 21.1, stop valve air inlet, 22, pressure reducing valve, 22.1, pressure reducing valve air outlet, 22.2, pressure reducing valve air inlet. the

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described. the

As shown in Figure 1 and Figure 2, a piston cylinder 3 is installed between the front end cover 1 and the rear end cover 5 of the present utility model, and the front end cover 1 and the rear end cover 5 are connected by a front guide rod 20 to form a sealed cylinder body, and 17 is a seal There is an air intake pipe 1.4 in the center of the front end cover 1, a vent pipe 1.2 parallel to the axis of the piston cylinder 3 and a pressure gauge pipe 1.4 are respectively opened on both sides of the front end cover 1, and a vent pipe 1.2 is opened on both sides of the end cover 1. The connected vent port 1.1 and the pressure gauge interface 1.5 connected with the pressure gauge pipe 1.4, the vent pipe 5.2 parallel to the axis of the piston cylinder 3 is opened in the rear end cover 5, and the vent pipe 5.2 is opened on the side of the rear end cover 5 to communicate with the vent pipe 5.2 The air vent 5.1, the sleeve 6 is installed on the rear end cover 5, the piston 2 is placed in the piston cylinder 3, one end of the piston rod 4 is connected with the piston 2, the other end of the piston rod 4 extends into the sleeve 6, and is located in the sleeve 6 One end of the inner screw mandrel 8 is threadedly connected with the other end of the piston rod 4, 16 is the screw mandrel head, and the other end of the screw mandrel 8 stretches out of the sleeve 6 through the guide plate 7 holes and the sleeve cover 10 holes, and is connected with the rotating The handle 11 is connected; the guide plate 7 is installed in the rear guide rod 9, and the rotating handle 11 is rotated by the screw mandrel 8 to control the movement of the guide plate 7, and the guide plate 7 promotes the piston rod 4 to move forward. the

The opposite surfaces of the rear end cap 5 and the sleeve cover 10 are provided with a circular groove 10.1, and the rear end cap 5, the sleeve 6 and the sleeve cover 10 form a closed space; the guide plate 7 is equipped with a linear bearing 15 , The linear bearing 15 cooperates with the rear guide rod 9. the

A gray ring 19 is arranged in the middle of the side surface of the piston 3 , and guide wear rings 18 are provided on the side surfaces of the piston 3 above and below the gray ring 19 . the

Two angular contact ball bearings 13 are installed on the upper end of the screw mandrel 8 and fixed with a bearing cover 12 and a sleeve cover 10 to prevent axial movement. the

The working principle of the utility model is as follows:

Before sampling, first turn the rotary handle 11 to the right, the rotary handle controls the rotation of the screw rod 8, the screw rod 8 drives the guide plate 7 to push the piston rod 4 forward, pushes the piston 2 to the limit position, and then turns the handle to the left 11. Return the guide plate 7 to the rearmost side (to prevent the guide plate from obstructing the piston rod during sampling), when sampling, as shown in Figure 3, close the vent port 1.1 on the side of the front cover and the air inlet of the air intake pipe 1.3 1.6 A cut-off valve 21 is installed, and an external pressure reducing valve 22 is installed. The air outlet 22.1 of the pressure reducing valve is connected to the air inlet 21.1 of the cut-off valve, and the air inlet 22.2 of the pressure reducing valve is connected to the sampling point. Adjust the pressure reducing valve 21 to a suitable pressure reduction After the comparison, open the stop valve 21 at the air inlet of the device, and the high-pressure gas in the pipeline will flow into the sampling cylinder body through the decompression valve 22, and the piston will move backward under the pressure of the gas. When the piston rod retreats to the limit position, the sampling is completed and closed. Stop valve 21. the

Claims (4)

1. mobile piston formula rock gas sampling apparatus; It is characterized in that: between front cover (1) and rear end cover (5) piston cylinder (3) is installed; Connect and compose the cylinder body of sealing between front cover (1) and rear end cover (5) through preceding guide rod (20), front cover (1) center has admission line (1.4), and front cover (1) both sides have exhausting pipeline (1.2) and the pressure gauge 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 pressure gauge pipeline (1.4) in end cap (1) bi-side; Have the breather line (5.2) with piston cylinder (3) parallel axes in the rear end cover (5), and have the ventilating hole (5.1) that is communicated with breather line (5.2), installing sleeve (6) on the rear end cover (5) in rear end cover (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 rotatable handle (11); Guide plate (7) is installed in the back-guiding rod (9), and rotatable 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 cover (5) and the relative face of socket cover (10) are equipped with circular groove, and rear end cover (5), sleeve (6) and socket cover (10) constitute enclosed 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.

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