Pipeline tail end pressure evacuation air valve

Abstract

The utility model relates to the technical field of fuel gas equipment, in particular to a pipeline tail end pressure evacuation air valve which comprises a pipeline, an air valve is installed at one end of the pipeline, and one side of the outer wall of the air valve is fixedly connected with the inner wall of one end of a shell. Through cooperation of a pipeline, an air valve, a shell, a rubber block, a square plate, a sliding rod, a spring, a rubber ring, a barrel body, a transverse rod, a vertical barrel, a piston, a rod body, a one-way valve, an annular plate, a circular ring and an evacuation structure, a clamping plate is rotated to the inner side to hold and rotate a lead screw, then the clamping plate gradually moves leftwards, the clamping plate is attached to a circular plate, fixing of a straight pipe is achieved, and the rubber block moves rightwards; the valve and the air valve are opened, then mixed gas enters the shell, enters the vertical cylinder through the shell and then enters the air bag through the one-way valve, the straight pipe and the hose, then the mixed gas is collected, the discharged mixed gas is conveniently collected during pressure evacuation, and danger caused by direct discharge is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gas equipment, in particular to a pipeline end pressure air extraction valve. Background Art

[0002] During the natural gas replacement process, according to the pipeline construction situation, such as urban gas pipelines, replacement operations are required after the construction is completed. During the operation, the terminal valve, pressure regulating cabinet or pressure regulating box is generally used as the replacement end detection point. There will still be some pipelines at the rear end of the terminal valve, pressure regulating cabinet or pressure regulating box. This will result in some mixed gases that are not completely replaced in the pipeline at the rear end of the detection point during replacement, and the internal air cannot be completely discharged, so a pressure air extraction valve is required.

[0003] There is an existing urban gas construction pipeline end pressure extraction air valve device (application number: 202222642986.5) which can effectively discharge the residual mixed gas at the end of the pipeline, ensure the safe operation of the gas pipeline, and effectively avoid a series of problems such as corrosion of the inner wall of the pipeline by the mixed gas at the end of the pipeline. The above-mentioned problem still exists. When the mixed gas at the end of the pipeline is evacuated, the above-mentioned device opens the air valve by moving the piston away, and the mixed gas is directly discharged by the movement of the piston. It is not convenient to collect the discharged mixed gas during pressure extraction, and direct discharge is prone to danger. Moreover, when the mixed gas is discharged, it is not convenient to extract all the mixed gas in the shell, and residue is prone to occur. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art that it is inconvenient to collect the discharged mixed gas during pressure pumping, direct discharge is prone to danger, and it is inconvenient to extract all the mixed gas in the shell, which is prone to residue, and a pipeline end pressure pumping air valve is proposed.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pipeline end pressure-evacuation air valve is designed, comprising a pipeline, an air valve is installed at one end of the pipeline, one side of the outer wall of the air valve is fixedly connected to the inner wall of one end of a shell, a rubber block is tightly fitted to the inner wall of one end of the air valve, one end of the rubber block is fixedly connected to a cross bar, a vertical cylinder is fixedly connected to the top inner wall of the shell, a one-way valve is fixedly connected to the inner wall below one side of the vertical cylinder, one end of the one-way valve is fixedly connected to an annular plate, a circular ring is provided on one side of the annular plate, and an air evacuation structure is provided on one side of the circular ring.

[0007] Preferably, the evacuation structure includes a straight tube, an outer wall of the straight tube is fixedly connected to the inner wall of the circular ring, one side of the outer wall of the straight tube is gap-matched with the inner wall of the annular plate, one side of the outer wall of the straight tube is tightly fitted with a rubber sleeve, the outer wall of the rubber sleeve is fixedly connected to the inner wall of the annular plate, one end of the straight tube is connected to a hose, one end of the hose is fixedly connected to a valve, one end of the valve is fixedly connected to an airbag, one side of the straight tube is provided with a splint, one side of the outer wall of the splint is fitted with the outer side of one end of the circular ring, one end of the splint is rotatably connected to a screw rod through a bearing, one side of the outer wall of the screw rod is threadedly connected to a vertical block, and one end of the vertical block is fixedly connected to one end of the annular plate.

[0008] Preferably, a cylinder is gap-fitted on one side of the outer wall of the crossbar, and one side of the outer wall of the cylinder is fixedly connected to the inner wall of one end of the shell.

[0009] Preferably, a square plate is fixedly connected to the other side of the outer wall of the cross bar, a rubber ring is fixedly connected to the upper side of one side of the square plate, and the inner wall of the rubber ring is fixedly connected to the outer wall of the cross bar.

[0010] Preferably, a sliding rod is slidably connected to the lower inner wall of the square plate, one end of the sliding rod is fixedly connected to the lower side of one side of the inner wall of the shell, and a spring is gap-fitted on one side of the outer wall of the sliding rod, and the left and right ends of the spring are respectively fixedly connected to the lower side of one side of the square plate and the lower side of the inner wall of the shell.

[0011] Preferably, a piston is tightly fitted on the inner wall of the vertical cylinder, a rod body is fixedly connected to the top of the piston, and the upper part of the outer wall of the rod body is gap-matched with the top inner wall of the vertical cylinder.

[0012] The utility model provides a pipeline end pressure extraction air valve, the beneficial effect is: through the cooperation of the pipeline, the air valve, the shell, the rubber block, the square plate, the sliding rod, the spring, the rubber ring, the cylinder, the cross bar, the vertical cylinder, the piston, the rod body, the one-way valve, the annular plate, the circular ring and the vacuum structure, the device can be used when the clamping plate is rotated to the inside to support it, and the screw rod is rotated to gradually move the clamping plate to the left, so that the clamping plate and the circular ring are fitted to achieve the fixation of the straight pipe, the rubber block is moved to the right, the valve and the air valve are opened, and the mixed gas enters the shell, the mixed gas enters the vertical cylinder through the shell, and then enters the air bag through the one-way valve, the straight pipe and the hose, so as to realize the collection of the mixed gas, which is convenient for collecting the discharged mixed gas when the pressure is evacuated, and avoids the danger of direct discharge;

[0013] Through the coordination of the pipeline, air valve, shell, rubber block, square plate, sliding rod, spring, rubber ring, cylinder, cross bar, vertical cylinder, piston, rod body, one-way valve, annular plate and circular ring, when the device is in use, when the mixed gas no longer passes through the one-way valve to enter the airbag, the rod body moves upward, and the rod body drives the piston to move upward, thereby drawing the mixed gas in the shell, so that the mixed gas passes through the one-way valve again to enter the airbag, thereby facilitating the extraction of all the mixed gas in the shell to avoid residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the pipeline, gas valve and shell structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the square plate, the sliding rod and the rubber ring of the utility model;

[0017] Figure 4 This is a schematic diagram of the rubber block, square plate and crossbar structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the splint, vertical block and screw rod of the utility model;

[0019] Figure 6 This is a schematic diagram of the airbag, valve and hose structure of the utility model.

[0020] In the figure: 1. pipeline, 2. evacuation structure, 2a1. air bag, 2a2. valve, 2a3. hose, 2a4. splint, 2a5. vertical block, 2a6. screw rod, 2a7. rubber sleeve, 2a8. straight pipe, 2b1. rubber pad, 2b2. bump, 3. air valve, 4. shell, 5. rubber block, 6. square plate, 7. slide rod, 8. spring, 9. rubber ring, 10. cylinder, 11. cross bar, 12. vertical cylinder, 13. piston, 14. rod body, 15. one-way valve, 16. ring plate, 17. ring. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] Embodiment 1:

[0023] See attached Figure 1-6: In the present embodiment, a pipeline end pressure extraction air valve comprises a pipeline 1, one end of which is provided with an air valve 3, one side of the outer wall of the air valve 3 is fixedly connected to the inner wall of one end of a shell 4, a rubber block 5 is tightly fitted to the inner wall of one end of the air valve 3, one end of the rubber block 5 is fixedly connected to a cross bar 11, a vertical cylinder 12 is fixedly connected to the top inner wall of the shell 4, a one-way valve 15 is fixedly connected to the inner wall below one side of the vertical cylinder 12, one end of the one-way valve 15 is fixedly connected to an annular plate 16, one side of the outer wall of the cross bar 11 is gap-fitted with a cylinder 10, a sealing ring is fixedly connected to the inner wall of the cylinder 10, one side of the outer wall of the cylinder 10 is fixedly connected to the inner wall of one end of the shell 4, a circular ring 17 is provided on one side of the annular plate 16, a square plate 6 is fixedly connected to the other side of the outer wall of the cross bar 11, a rubber ring 9 is fixedly connected to the upper side of one side of the square plate 6, and the inner wall of the rubber ring 9 is fixedly connected to the cross bar 11. The outer wall of the rod 11 is fixedly connected, and the rubber ring 9 can be sealed again when it moves to fit with the cylinder 10. The inner wall below the square plate 6 is slidably connected with a sliding rod 7. The sliding rod 7 plays a limiting role when the square plate 6 is forced to move left and right. One end of the sliding rod 7 is fixedly connected to the lower side of the inner wall of the shell 4, and a spring 8 is matched with the gap on one side of the outer wall of the sliding rod 7. The spring 8 gives the square plate 6 a force to the left. The left and right ends of the spring 8 are respectively fixedly connected to the lower side of one side of the square plate 6 and the lower side of the inner wall of the shell 4. The inner wall of the vertical cylinder 12 is tightly fitted with a piston 13, and the top of the piston 13 is fixedly connected with a rod body 14. The upper part of the outer wall of the rod body 14 is matched with the gap of the top inner wall of the vertical cylinder 12. A vacuum structure 2 is provided on one side of the ring 17. The vacuum structure 2 is convenient for collecting the discharged mixed gas when the pressure is evacuated to avoid direct discharge and danger.

[0024] The evacuation structure 2 includes a straight tube 2a8, the outer wall of the straight tube 2a8 is fixedly connected to the inner wall of the ring 17, one side of the outer wall of the straight tube 2a8 is gap-matched with the inner wall of the annular plate 16, one side of the outer wall of the straight tube 2a8 is tightly fitted with a rubber sleeve 2a7, the rubber sleeve 2a7 plays a sealing role, the outer wall of the rubber sleeve 2a7 is fixedly connected to the inner wall of the annular plate 16, one end of the straight tube 2a8 is connected to a hose 2a3, one end of the hose 2a3 is fixedly connected to a valve 2a2, one end of the valve 2a2 is fixedly connected to an airbag 2a1, and the airbag 2a 1 is used to store mixed gas. A clamping plate 2a4 is provided on one side of the straight pipe 2a8. One side of the outer wall of the clamping plate 2a4 is in contact with the outer side of one end of the ring 17. One end of the clamping plate 2a4 is rotatably connected to a screw rod 2a6 through a bearing. The bearing allows the screw rod 2a6 to rotate at one end of the clamping plate 2a4 when a force is applied. One side of the outer wall of the screw rod 2a6 is threadedly connected to a vertical block 2a5. One end of the vertical block 2a5 is fixedly connected to one end of the annular plate 16, so that the discharged mixed gas can be collected when the pressure is evacuated to avoid direct discharge and danger.

[0025] Working principle:

[0026] When evacuating the pressure at the end of the pipeline:

[0027] Turn the clamping plate 2a4 to the inside and hold it, turn the screw 2a6, and then gradually move the clamping plate 2a4 to the left, so that the clamping plate 2a4 fits with the ring 17, and the straight tube 2a8 is fixed, and the cross bar 11 is pulled to the right, and the cross bar 11 drives the rubber block 5 to move to the right, and the air valve 3 opens, so that the mixed gas enters the shell 4, and the valve 2a2 is opened, and the mixed gas passes through the one-way valve 15, the straight tube 2a8 and the hose 2a3 and enters the air bag 2a1, so that the mixed gas is collected and the pressure is discharged at the same time. When the mixed gas no longer passes through the one-way valve 15, pull the rod body 14 upwards, and the rod body 14 drives the piston 13 to move upwards, so that the residual mixed gas in the shell 4 passes through the one-way valve 15 and enters the air bag 2a1 to avoid residue.

[0028] Embodiment 2:

[0029] See attached Figure 1-6 : In the present embodiment, a pipeline end pressure air extraction valve is provided, wherein the air extraction structure 2 may further include a rubber pad 2b1 and a protrusion 2b2, the left and right ends of the rubber pad 2b1 are respectively fitted with one end of the annular plate 16 and one end of the circular ring 17, a protrusion 2b2 is fixedly connected to the outer side of one end of the rubber pad 2b1, and the protrusions 2b2 on the left and right sides are respectively fitted with the outer grooves of one end of the annular plate 16 and the outer grooves of one end of the circular ring 17.

[0030] Working principle:

[0031] The protrusion 2b2 is placed into the inner wall of the annular plate 16 and the circular ring 17, and the annular plate 16 and the circular ring 17 clamp the rubber pad 2b1, thereby achieving re-sealing, improving the sealing effect and avoiding leakage.

[0032] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A pipeline end pressure extraction air valve, comprising a pipeline (1), Features: An air valve (3) is installed at one end of the pipeline (1); one side of the outer wall of the air valve (3) is fixedly connected to the inner wall of one end of the shell (4); a rubber block (5) is tightly fitted to the inner wall of one end of the air valve (3); one end of the rubber block (5) is fixedly connected to a cross bar (11); a vertical cylinder (12) is fixedly connected to the top inner wall of the shell (4); a one-way valve (15) is fixedly connected to the inner wall below one side of the vertical cylinder (12); one end of the one-way valve (15) is fixedly connected to an annular plate (16); a circular ring (17) is provided on one side of the annular plate (16); and a vacuum structure (2) is provided on one side of the circular ring (17).

2. A pipeline end pressure extraction air valve according to claim 1, Features: The evacuation structure (2) comprises a straight tube (2a8), the outer wall of the straight tube (2a8) is fixedly connected to the inner wall of the circular ring (17), one side of the outer wall of the straight tube (2a8) is gap-matched with the inner wall of the annular plate (16), one side of the outer wall of the straight tube (2a8) is tightly fitted with a rubber sleeve (2a7), the outer wall of the rubber sleeve (2a7) is fixedly connected to the inner wall of the annular plate (16), one end of the straight tube (2a8) is connected to a hose (2a3), and one end of the hose (2a3) is fixedly connected to the inner wall of the annular plate (16). A valve (2a2) is connected, one end of the valve (2a2) is fixedly connected to an air bag (2a1), one side of the straight tube (2a8) is provided with a clamping plate (2a4), one side of the outer wall of the clamping plate (2a4) is in contact with the outer side of one end of the circular ring (17), one end of the clamping plate (2a4) is rotatably connected to a screw rod (2a6) through a bearing, one side of the outer wall of the screw rod (2a6) is threadedly connected to a vertical block (2a5), and one end of the vertical block (2a5) is fixedly connected to one end of the annular plate (16).

3. A pipeline end pressure extraction air valve according to claim 1, Features: One side of the outer wall of the cross bar (11) is loosely fitted with a cylinder (10), and one side of the outer wall of the cylinder (10) is fixedly connected to the inner wall of one end of the shell (4).

4. A pipeline end pressure extraction air valve according to claim 1, Features: A square plate (6) is fixedly connected to the other side of the outer wall of the cross bar (11), a rubber ring (9) is fixedly connected to the upper side of one side of the square plate (6), and the inner wall of the rubber ring (9) is fixedly connected to the outer wall of the cross bar (11).

5. A pipeline end pressure extraction air valve according to claim 4, Features: A slide rod (7) is slidably engaged with the lower inner wall of the square plate (6), one end of the slide rod (7) is fixedly connected to the lower side of one side of the inner wall of the shell (4), and a spring (8) is gap-fitted on one side of the outer wall of the slide rod (7), and the left and right ends of the spring (8) are respectively fixedly connected to the lower side of one side of the square plate (6) and the lower side of the inner wall of the shell (4).

6. A pipeline end pressure extraction air valve according to claim 1, Features: The inner wall of the vertical cylinder (12) is tightly fitted with a piston (13), the top of the piston (13) is fixedly connected with a rod body (14), and the upper part of the outer wall of the rod body (14) is gap-fitted with the inner wall of the top of the vertical cylinder (12).

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