CN216741920U

CN216741920U - Reciprocating type low-temperature liquid pump frost prevention protection device

Info

Publication number: CN216741920U
Application number: CN202220138918.2U
Authority: CN
Inventors: 曾永林; 林闻捷
Original assignee: Xinyu Iron and Steel Co Ltd
Current assignee: Xinyu Iron and Steel Co Ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-06-14
Anticipated expiration: 2032-01-19

Abstract

The utility model provides a reciprocating type cryogenic liquids pump frost protection device, belongs to reciprocating type cryogenic liquids pump technical field, this frost protection device, including the pump body and through the drive case that the piston rod links to each other, can dismantle between drive case and the pump body and be connected with seal shell, seal shell goes up the sealed mounting and has the breather pipe and link to each other with dry air supply through the breather pipe, the last gas vent that still is provided with of seal shell, the beneficial effects of the utility model are that, this frost protection device overall structure is simple, makes the piston rod isolated with the atmosphere, has avoided frosting the problem of freezing, can prolong the life that packs in the liquid pump, has reduced the liquid pump maintenance frequency, has further promoted the running life and the safety of liquid pump.

Description

Reciprocating type low-temperature liquid pump frost prevention protection device

Technical Field

The utility model relates to a reciprocating type cryogenic liquids pump technical field especially relates to a reciprocating type cryogenic liquids pump frost prevention protection device.

Background

Oxygen, nitrogen and argon are needed by converters and blast furnaces in the steel industry, and the oxygen production industry for producing the three gas products generally adopts an air liquefaction separation method, air is pressurized to 0.5MPa, is cooled to below-110 ℃ through heat exchange of a main heat exchanger for liquefaction, participates in rectification in a tower, and is reheated to normal temperature through the main heat exchanger by utilizing different boiling points of the oxygen, the nitrogen and the argon to obtain oxygen, nitrogen and argon gas products, the oxygen, nitrogen and argon gas products are pressurized to a certain pressure through a compressor and then are conveyed to a steel plant and an iron plant through industrial pipelines, and a small amount of liquid oxygen, liquid nitrogen and liquid argon are respectively stored in different low-temperature storage tanks as byproducts of air separation. When the user usage is increased and the air separation device is insufficient in supply, the pressure of a user pipe network is reduced, and after the pressure is reduced to a certain degree, the requirements of users cannot be met. At this time, the vaporized oxygen, nitrogen and argon pumps are started, the liquid in the low-temperature storage tank is pressurized to 2.0Mpa through the piston pump, and is vaporized into gas through heat exchange with air, and the gas is sent to a user pipe network.

Vaporized oxygen, nitrogen, argon pump usually adopt reciprocating type piston cryogenic liquids pump, send into the pipe network after to liquid pressurization, in order to prevent cryogenic liquids from leaking from the cylinder, adopt the filler to seal between the piston rod and the pump body, because of piston rod reciprocating motion and filler take place the friction, can appear leaking after operation a period of time, cryogenic liquids leaks out along the piston rod, for preventing that cryogenic liquids from flowing into the drive box and causing the drive box to damage, so the piston rod must be exposed in the air, in case take place the liquid leakage, immediately evacuate to the air, can effectively protect with the drive box not damaged by the frostbite like this.

Because the liquid pump pressurizes low-temperature liquid (liquid oxygen-183 ℃, liquid nitrogen-196 ℃ and liquid argon-186 ℃), the temperature of the piston rod is inevitably reduced to be below zero, the piston rod is exposed in air, so the piston rod is easy to frost or freeze, once the piston rod frosts or freezes, the friction between the piston rod and the filler is intensified when the piston rod reciprocates, the service life of the filler is greatly shortened, and leakage is easy to cause, the leakage can occur when the liquid pump operates for one to two months under general conditions, once the leakage occurs, the liquid pump must be stopped to repair in time, the filler is replaced, otherwise the leakage can cause frostbite accidents or explosion accidents, particularly the leakage of the liquid oxygen has great possibility of explosion accidents, the liquid pump is frequently repaired, manpower and material resources are consumed, and the production and the supply are influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a reciprocating type cryogenic liquids pump frost protection device, its overall structure is simple, makes the piston rod isolated with the atmosphere, has avoided frosting frozen problem, can prolong the life of packing in the liquid pump, reduces the liquid pump and overhauls the frequency, reduces the intensity of labour who overhauls the workman, further promotes the running life and the safety of liquid pump.

In order to achieve the above object, the technical solution of the present invention to solve the technical problem is: reciprocating type cryogenic liquids pump frost protection device, including the pump body and the drive case that links to each other through the piston rod, can dismantle between drive case and the pump body and be connected with seal shell, seal shell goes up sealed mounting has the breather pipe and links to each other with dry air supply through the breather pipe, the last gas vent that still is provided with of seal shell.

The both ends opening setting of seal shell, just seal gasket is installed at seal shell's both ends and links to each other with the contact of the pump body and drive case through sealed the pad.

The two ends of the sealing shell are respectively provided with a plurality of mounting holes at intervals along the circumferential direction, bolts are mounted in the mounting holes and penetrate through the sealing pad to be fixedly connected with the pump body or the driving box.

The sealing shell is provided with a mounting opening, and a sealing assembly is mounted on the mounting opening and is connected with the vent pipe through the sealing assembly.

The sealing assembly comprises a sealing plate, a sealing ring is sleeved on the circumferential direction of the sealing plate and connected with the mounting port in a clamping mode through the sealing ring, and a quick coupler is mounted in the middle of the sealing plate and connected with the ventilating pipe through the quick coupler.

The periphery of closing plate is provided with the joint tang, the sealing ring with the joint is in after the closing plate joint cooperation the joint is in installing port department.

The sealing assembly comprises a rubber plug connected with the mounting port in a clamping mode, and the center of the rubber plug is connected with the vent pipe in an inserting mode.

And a fastening component for fastening and attaching the sealing assembly to the mounting opening is arranged outside the sealing assembly.

The fastening component is arranged as an iron wire or a hoop.

The breather pipe is provided with a plurality ofly, installs the control valve of adjustable air current size between two adjacent breather pipes, the breather pipe passes through the air supply house steward and links to each other with dry air supply.

The utility model has the advantages that:

1. the utility model discloses a connect seal housing between the drive case and the pump body, install the breather pipe on seal housing, through continuously letting in dry gas to the breather pipe, make dry gas be discharged by the gas vent after being full of seal housing, make whole piston rod be full of dry gas around, it is isolated with the outside air, the problem of piston rod frosting or freezing has been prevented, the life who packs in the liquid pump has been prolonged, the maintenance frequency of liquid pump has been reduced, the intensity of labour who overhauls the workman has been reduced, the running life and the safety of liquid pump have further been promoted.

2. The utility model discloses a sealed pad is sealed in seal housing's both ends installation, has improved the leakproofness of being connected between seal housing and drive case and the pump body, links to each other with the breather pipe after the installation seal assembly through the installing port department at seal housing, has further improved the leakproofness of breather pipe installation, can make to be full of dry gas in the seal housing fast.

To sum up, this frost prevention protection device overall structure is simple, makes the piston rod isolated with the atmosphere, has avoided the problem that frosts and freeze, can prolong the life of packing in the liquid pump, has reduced liquid pump maintenance frequency, has further promoted the running life and the safety of liquid pump.

Drawings

The contents of the various figures of the specification and the labels in the figures are briefly described as follows:

fig. 1 is a schematic view of the internal structure of the present invention;

fig. 2 is a schematic external structural view of the present invention;

the labels in the above figures are: 1. the air source system comprises a pump body, 2 a piston rod, 3 a driving box, 4 a sealing shell, 41 an exhaust port, 42 a mounting port, 5 an air pipe, 6 a sealing gasket, 7 a bolt, 8 a sealing assembly, 81 a sealing plate, 811 a clamping spigot, 82 a sealing ring, 9 a quick connector, 10 a fastening component, 11 a control valve and 12 an air source main pipe.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model discloses specific embodiment does: as shown in fig. 1, the utility model provides a reciprocating type cryogenic liquids pump frost prevention protection device, including the pump body 1 and the drive case 3 that links to each other through piston rod 2, can dismantle between drive case 3 and the pump body 1 and be connected with seal housing 4, seal housing 4 goes up the sealed breather pipe 5 of installing and links to each other with dry air supply through breather pipe 5, still is provided with gas vent 41 on the seal housing 4. The utility model discloses a continuously let in dry gas in to breather pipe 5, make dry gas be full of behind the seal housing 4 by gas vent 41 discharges, make whole piston rod 2 be full of dry gas around, it is isolated with the outside air, prevented that piston rod 2 from frosting or frozen problem, prolonged the life who packs in the liquid pump, reduced the maintenance frequency of liquid pump, reduced maintenance workman's intensity of labour, further promoted the running life and the safety of liquid pump.

Specifically, the both ends opening setting of seal housing 4 wherein, and seal housing 4's both ends are installed sealed the pad 6 and are linked to each other with the contact of the pump body 1 and drive case 3 through sealed pad 6, and seal housing 4's both ends are provided with a plurality of mounting holes along circumference interval respectively, install bolt 7 in the mounting hole, bolt 7 passes behind sealed pad 6 and links to each other with pump body 1 or drive case 3 is fixed, has improved the leakproofness and the fastness that seal housing 4 connects.

Specifically, the sealing housing 4 is provided with a mounting opening 42, the mounting opening 42 is provided with the sealing assembly 8 and is connected with the ventilation pipe 5 through the sealing assembly 8, so that the sealing performance of the installation of the ventilation pipe 5 can be improved, wherein the sealing assembly 8 comprises the following structures:

one structure is as follows: as shown in fig. 1, the sealing assembly 8 includes a sealing plate 81, the sealing plate 81 may be configured as an aluminum plate, a sealing ring 82 is sleeved on the circumferential direction of the sealing plate 81 and is connected to the mounting port 42 in a clamping manner through the sealing ring 82, a quick coupler 9 is installed in the middle of the sealing plate 81, namely, one end of the quick coupler 9 is inserted into the middle of the sealing plate 81 and then fixed through a nut, and the other end of the quick coupler 9 is connected to the vent pipe 5, so that the vent pipe 5 is more convenient to mount and dismount. The periphery of sealing plate 81 wherein is provided with joint tang 811, and the joint is in installing port 42 department after sealing ring 82 and the cooperation of sealing plate 81 joint, has avoided sealing plate 81 to fall into in the sealed housing 4 when the installation.

The other structure is as follows: not shown in the figure, the sealing assembly 8 comprises a rubber plug connected with the mounting hole 42 in a clamping manner, and the center of the rubber plug is inserted with the vent pipe 5, so that the installation of the vent pipe 5 is more convenient and faster, and the installation tightness of the vent pipe 5 is ensured.

As shown in fig. 2, a fastening member 10 for fastening the sealing assembly 8 to the mounting opening 42 is disposed outside the sealing assembly 8, and the fastening member 10 is configured as a wire or a clip, so that the sealing assembly 8 is prevented from being separated from the mounting opening 42, and the sealing stability of the sealing assembly 8 is ensured.

In addition, as shown in fig. 1, the air pipe 5 can be a hollow copper pipe, and can be easily bent after heating and annealing, thereby facilitating pipe arrangement for construction. The breather pipe 5 is provided with a plurality ofly, can be according to place actual conditions, and the angle steel is done the support and is fixed breather pipe 5, and the angle steel can bury ground also can weld on other pipelines.

Install the control valve 11 of adjustable air current size between two adjacent breather pipes 5, breather pipe 5 passes through air supply house steward 12 and links to each other with dry air supply, the air supply in this air supply house steward 12 is dry nitrogen gas or air, air supply pressure is generally less than 0.6Mpa, this control valve 11 sets up to manual valve, choose for use the pressure rating to be 1Mpa, can adjust the aperture of control valve 11 as required, its aperture size uses piston rod 2 not to frost and not freeze as the standard, increase the aperture in order to increase the air input when the phenomenon of frosting appears.

In addition, the exhaust port 41 is not opposite to the outlet of the vent pipe 5, and the area of the exhaust port 41 is small, so that the sealing shell 4 can be ensured to be filled with dry gas (nitrogen or air), the piston rod 2 is ensured to be completely isolated from the outside air, and the phenomena of frosting and icing are effectively prevented.

The utility model discloses a reciprocating type piston cryogenic liquid pump frost prevention protection device utilizes dry gas's hygroscopicity, fills into seal housing 4's cavity, makes piston rod 2 and air isolated to avoid the piston rod to frost or freeze, reduce the friction of piston rod 2 and filler, reach extension filler seal life, reduced the leakage risk, also reduced workman's maintenance intensity.

The foregoing is merely illustrative of some of the principles of the present invention and the description is not intended to limit the invention to the specific constructions and applications shown, so that all modifications and equivalents that may be utilized are within the scope of the invention.

Claims

1. The utility model provides a reciprocating type cryogenic liquids pump frost prevention protection device, its characterized in that, includes the pump body and the drive case that links to each other through the piston rod, can dismantle between drive case and the pump body and be connected with seal housing, seal housing is last to seal and to install the breather pipe and to link to each other with dry air source through the breather pipe, seal housing is last still to be provided with the gas vent.

2. The reciprocating cryogenic liquid pump frost protection device of claim 1, wherein: the both ends opening setting of seal shell, just seal gasket is installed at seal shell's both ends and links to each other with the contact of the pump body and drive case through sealed the pad.

3. The reciprocating cryogenic liquid pump frost protection device of claim 2, wherein: the two ends of the sealing shell are respectively provided with a plurality of mounting holes at intervals along the circumferential direction, bolts are mounted in the mounting holes and penetrate through the sealing pad to be fixedly connected with the pump body or the driving box.

4. The frost protection device of a reciprocating cryogenic liquid pump of any of claims 1 to 3, wherein: the sealing shell is provided with a mounting opening, and a sealing assembly is mounted on the mounting opening and is connected with the vent pipe through the sealing assembly.

5. The reciprocating cryogenic liquid pump frost protection device of claim 4, wherein: the sealing assembly comprises a sealing plate, a sealing ring is sleeved on the circumferential direction of the sealing plate and connected with the mounting port in a clamping mode through the sealing ring, and a quick coupler is mounted in the middle of the sealing plate and connected with the ventilating pipe through the quick coupler.

6. The reciprocating cryogenic liquid pump frost protection device of claim 5, wherein: the periphery of closing plate is provided with the joint tang, the sealing ring with the joint is in after the closing plate joint cooperation the joint is in installing port department.

7. The reciprocating cryogenic liquid pump frost protection device of claim 4, wherein: the sealing assembly comprises a rubber plug connected with the mounting port in a clamping mode, and the center of the rubber plug is connected with the vent pipe in an inserting mode.

8. The reciprocating cryogenic liquid pump frost protection device of claim 4, wherein: and a fastening component for fastening and attaching the sealing assembly to the mounting opening is arranged outside the sealing assembly.

9. The reciprocating cryogenic liquid pump frost protection device of claim 8, wherein: the fastening component is arranged as an iron wire or a hoop.

10. The reciprocating cryogenic liquid pump frost protection device of claim 1, wherein: the breather pipe is provided with a plurality ofly, installs the control valve of adjustable air current size between two adjacent breather pipes, the breather pipe passes through the air supply house steward and links to each other with dry air supply.