CN221195367U - Gas seal balancing device applied to material pump - Google Patents

Abstract

The utility model provides a gas seal balancing device applied to a material pump. The plunger pump solves the problem that the sealing ring is extremely easy to leak due to different pressures at two sides of the sealing ring in the conventional plunger pump. In the utility model, the pressure at two sides of the mixing chamber is in an equilibrium state through the balancer, and the sealing gas filled in the sealing chamber is used for blocking and sealing materials, so that the sealing effect is good, and leakage of the materials with pollution can be effectively avoided.

Description

Gas seal balancing device applied to material pump

Technical Field

The utility model relates to the technical field of plunger pumps, in particular to a gas sealing balance device applied to a material pump.

Background

When the plunger pump is used, materials are required to be compressed through the reciprocating piston rod, and the materials are usually sealed through the sealing ring sleeved on the piston rod, but in the actual use process, the leakage is very easy to occur at the sealing ring because of different pressures at two sides of the sealing ring, the materials are usually toxic substances, the pollution is easy to cause, and the prior art has an improvement part.

Disclosure of Invention

The utility model provides a gas sealing balance device applied to a material pump aiming at the existing situation, which is characterized by comprising a cylinder sleeve for compressing materials, a balancer for balancing pressure and a material chamber fixedly arranged at one end of the cylinder sleeve, wherein a piston rod is movably arranged in the cylinder sleeve, a first sealing component, a second sealing component and a third sealing component are sleeved on the piston rod in sequence, a mixing chamber is arranged between the first sealing component and the second sealing component, a sealing chamber filled with sealing gas which does not react with the materials is arranged between the second sealing component and the third sealing component, and the material chamber and the sealing chamber are respectively connected with the balancer through pipelines and then are subjected to pressure balance.

Preferably, the material chamber is connected with the balancer through a connection port communicated with the cylinder sleeve.

Preferably, a material pressure chamber and a sealing pressure chamber are respectively arranged in the balancer, the material pressure chamber and the sealing pressure chamber are separated and sealed through a diaphragm, the sealing pressure chambers are positioned at two sides of the material pressure chamber, the material pressure chamber is communicated with the material chamber, and the sealing pressure chamber is communicated with the sealing chamber.

Preferably, both ends of the balancer are respectively provided with an air inlet communicated with the sealing pressure chamber for conveying sealing gas and a pressure relief opening for releasing the sealing gas.

Preferably, a flow monitor for detecting the input amount of the sealing gas is arranged at the gas inlet.

Preferably, the material chamber is respectively provided with a liquid inlet and a return air inlet, and one end of the cylinder sleeve, which is far away from the piston rod, is provided with a liquid outlet.

Compared with the prior art, the pressure on two sides of the mixing chamber is in an equilibrium state through the balancer, and the sealing gas filled in the sealing chamber is used for blocking and sealing materials, so that the sealing effect is good, and leakage of the materials with pollution can be effectively avoided.

Drawings

FIG. 1 is an overall structural view of the present utility model;

FIG. 2 is a schematic diagram of the pressurized flow of material.

The marks in the figure: 1. cylinder sleeve; 2. a balancer; 3. a material chamber; 4. a sealing body; 5. a piston rod; 6. a first seal assembly; 7. a second seal assembly; 8. a third seal assembly; 9. a mixing chamber; 10. a sealed chamber; 11. a connection port; 12. a material pressure chamber; 13. sealing the pressure chamber; 14. a membrane; 15. an air inlet; 16. a pressure relief port; 17. a flow monitor; 18. a liquid inlet; 19. an air return port; 20. a liquid outlet; 21. a one-way valve.

Detailed Description

The utility model is further described below with reference to embodiments shown in the drawings in which:

As shown in fig. 1, a gas seal balancing device applied to a material pump comprises a cylinder liner 1 for compressing materials, a balancer 2 for balancing pressure, and a material chamber 3 fixedly arranged at one end of the cylinder liner 1, wherein a sealing body 4 is arranged at the other side of the material chamber 3, and the material chamber 3 is connected with the balancer 2 through a connecting port 11 communicated to the cylinder liner 1. The cylinder sleeve 1 is movably provided with a piston rod 5, the other end of the piston rod 5 passes through the material chamber 3 and then is positioned in the sealing body 4, the piston rod 5 is sequentially sleeved with a first sealing component 6, a second sealing component 7 and a third sealing component 8, the first sealing component 6, the second sealing component 7 and the third sealing component 8 are all sealing rings, a mixing chamber 9 is arranged between the first sealing component 6 and the second sealing component 7, a sealing chamber 10 filled with sealing gas which does not react with the material is arranged between the second sealing component 7 and the third sealing component 8, and the material chamber 3 and the sealing chamber 10 are respectively connected with the balancer 2 through pipelines and then are subjected to pressure balance. The material chamber 3 is respectively provided with a liquid inlet 18 and a return air inlet 19, and one end of the cylinder sleeve 1, which is far away from the piston rod 5, is provided with a liquid outlet 20. The pressure at two sides of the mixing chamber 9 is in an equilibrium state through the balancer 2, and the materials are blocked and sealed through sealing gas filled in the sealing chamber 10, so that the sealing effect is good, and leakage of the materials with pollution can be effectively avoided. After long-time use, when the first sealing component 6, the second sealing component 7 and the third sealing component 8 are all leaked, materials in the cylinder sleeve 1 leak into the mixing chamber 9, gas in the sealing chamber 10 leaks towards two sides and respectively enters the mixing chamber 9 and the outside of the sealing body 4, at the moment, part of sealing gas leaks, the total amount is reduced, the pressure in the balancer 2 is unbalanced, the pressure at two sides of the mixing chamber 9 is kept balanced again through the balance of the sealing gas which is replenished by the balancer 2, the leaked materials are blocked in the mixing chamber 9 through the sealing gas which does not react with the materials, the materials are prevented from leaking outside the sealing body 4, the blocking sealing of the materials is realized through the gaseous sealing gas, and the non-leakage of the materials is realized.

The balancer 2 is respectively provided with a material pressure chamber 12 and a sealing pressure chamber 13, the material pressure chamber 12 and the sealing pressure chamber 13 are separated and sealed by a diaphragm 14, the sealing pressure chambers 13 are positioned at two sides of the material pressure chamber 12, the material pressure chamber 12 is communicated with the material chamber 3, and the sealing pressure chambers 13 at two sides of the material pressure chamber 12 are communicated with the sealing chamber 10 after being connected outside the balancer 2. Both ends of the balancer 2 are respectively provided with an air inlet 15 for delivering sealing gas and a pressure relief opening 16 for releasing sealing gas, which are communicated with the sealing pressure chamber 13. The gas inlet 15 is provided with a flow monitor 17 for detecting the input amount of sealing gas, the gas inlet 15 is internally provided with a check valve 21 which can not only enter and exit, and the pressure relief opening 16 is internally provided with a check valve 21 which can not only enter and exit. During the processing, when the pressure is balanced, the air inlet 15 and the check valve 21 of the pressure relief opening 16 are closed; when the material pressure is greater than the sealing gas pressure, the diaphragm 14 bulges outwards, the air inlet 15 one-way valve 21 is extruded and opened, the pressure relief opening 16 one-way valve 21 is extruded and closed by the diaphragm 14, sealing gas is supplemented until the two pressures are balanced, and the two one-way valves 21 are kept in a closed state; when the material pressure is smaller than the sealing gas pressure, the diaphragm 14 is recessed inwards, the pressure relief opening 16 and the one-way valve 21 are stretched inwards by the diaphragm 14, the valve is closed, the air inlet 15 and the one-way valve 21 are closed, redundant sealing gas is released until the two pressures are balanced, and the two one-way valves 21 are kept in a closed state. And the quantity of the sealing gas input is monitored in real time through the flow monitor 17, when the sealing gas in the sealing body 4 leaks, an alarm can be triggered when the input quantity of the air inlet 15 is large, and the first sealing assembly 6, the second sealing assembly 7 and the third sealing assembly 8 can be replaced in time.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims (6)

1. The utility model provides a be applied to gas seal balancing unit of material pump, its characterized in that, including cylinder liner (1) that is used for compressing the material, be used for balanced pressure's balancer (2) and fixed material room (3) that set up in this cylinder liner (1) one end, the activity is provided with a piston rod (5) in cylinder liner (1), overlaps in proper order on this piston rod (5) and is equipped with first seal assembly (6), second seal assembly (7) and third seal assembly (8), be mixing chamber (9) between first seal assembly (6) and second seal assembly (7), be full of sealing gas's that is not reacted with the material sealing chamber (10) between second seal assembly (7) and the third seal assembly (8), carry out pressure balance after above-mentioned material room (3) and sealing chamber (10) are connected with above-mentioned balancer (2) through the pipeline respectively.

2. The gas seal balancing device applied to a material pump according to claim 1, wherein the material chamber (3) is connected with the balancer (2) through a connection port (11) communicated to a cylinder liner (1).

3. The gas seal balancing device applied to the material pump according to claim 2, characterized in that the balancer (2) is respectively provided with a material pressure chamber (12) and a seal pressure chamber (13), the material pressure chamber (12) and the seal pressure chamber (13) are separated and sealed by a diaphragm (14), the seal pressure chambers (13) are positioned at two sides of the material pressure chamber (12), the material pressure chamber (12) is communicated with the material chamber (3), and the seal pressure chamber (13) is communicated with the seal chamber (10).

4. A gas seal balancing device for a material pump according to claim 3, wherein both ends of the balancer (2) are respectively provided with a gas inlet (15) communicating with the seal pressure chamber (13) for delivering seal gas and a pressure release port (16) releasing seal gas.

5. The gas seal balancing device applied to a material pump according to claim 4, wherein a flow monitor (17) for detecting the input amount of seal gas is provided at the gas inlet (15).

6. The gas seal balancing device applied to the material pump according to claim 1, wherein the material chamber (3) is respectively provided with a liquid inlet (18) and a return air inlet (19), and one end of the cylinder sleeve (1) far away from the piston rod (5) is provided with a liquid outlet (20).