CN112797175A

CN112797175A - Low flow resistance cut-off valve for combustible non-standard gas burner

Info

Publication number: CN112797175A
Application number: CN202110156013.8A
Authority: CN
Inventors: 方戴立; 仲伟沧; 吴瑞和; 方士兴
Original assignee: Jiangyin Deer Thermal Energy Machinery Co ltd
Current assignee: Jiangyin Deer Thermal Energy Machinery Co ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-05-14

Abstract

The invention provides a low flow resistance cut-off valve for a combustible non-standard gas burner, which has small flow resistance to gas media and ensures that the gas media can be normally combusted after passing through the cut-off valve, and comprises a cut-off valve shell, wherein both ends of the cut-off valve shell are respectively provided with a medium inlet and a medium outlet, a sealing seat is arranged in the cut-off valve shell, an actuating mechanism is arranged on the cut-off valve shell and above the sealing seat, the lower end of the actuating mechanism extends into the cut-off valve shell and is connected with a sealing cover component, the actuating mechanism can drive the sealing cover component to move, the sealing cover component can be matched with the sealing seat for sealing, the inner cavity of the cut-off valve shell is blocked into two cavities, the sealing seat is obliquely arranged, so that the sealing seat forms a flow port through which the media can pass in the medium flow, the sealing cover assembly is obliquely arranged corresponding to the sealing seat.

Description

Low flow resistance cut-off valve for combustible non-standard gas burner

Technical Field

The invention relates to the technical field of burners, in particular to a low flow resistance cut-off valve for a combustible non-standard gas burner.

Background

In order to respond to the national calls for cost saving, consumption reduction and circular economy, waste heat utilization is carried out on various industrial combustible low-heat-value waste gases, and the emission of the waste gases reaches the environmental protection standard, in particular to the development and development of various combustible non-standard gas burners such as coke oven crude gas, blast furnace gas, coal bed and petrochemical gas, producer gas, converter gas, methane, hydrogen, purge gas, calcium carbide furnace tail gas, mixed gas and the like, the waste heat utilization system is widely used for various industrial boilers, power station boilers, organic heat carrier furnaces, heating furnaces, annealing furnaces, kilns, specially designed industrial furnaces, lithium bromide direct-fired machines and other thermal equipment in various industries, and good economic benefits and social benefits are obtained for wide use units.

Different from city gas, natural gas and the like, some non-standard gases are not subjected to any purification treatment, and some gases contain harmful components such as naphthalene, benzene, tar, dust, hydrogen sulfide and the like through primary purification treatment. The combustible component content is very little, the limited pressure of a process system is very low, the combustion load provided for high-power heat-generating equipment is very large, the gas flow required to be combusted is very large, the caliber of a gas valve is very large, the flow resistance generated by the structure of a commonly used stop valve is also very large, the kinetic energy loss is large, the normal combustion cannot be carried out after the pressure drop is increased, the stop valve can be used even after pressurization, the investment and the daily energy consumption are greatly increased, and the impurity deposition is easily caused in places with large internal resistance of a valve body when the gas containing impurities flows.

Disclosure of Invention

Aiming at the problems, the invention provides a low flow resistance cut-off valve for a combustible non-standard gas burner, which has small flow resistance to gas media and ensures that the gas media can be normally combusted after passing through the cut-off valve.

The technical scheme is as follows: the utility model provides a low flow resistance trip valve for flammable non-standard gas combustion ware, includes the trip valve casing, the both ends of trip valve casing are provided with medium entry and medium export respectively, be provided with the seal receptacle in the trip valve casing on, be located the top of seal receptacle is provided with actuating mechanism, actuating mechanism's lower extreme stretches into be connected with the seal cover subassembly in the trip valve casing, actuating mechanism can drive the removal of seal cover subassembly, the seal cover subassembly can with the seal receptacle cooperation is sealed, will two cavitys are blocked into to the inner chamber of trip valve casing, the seal receptacle slope sets up, makes the seal receptacle is in constitute the circulation mouth that can let the medium pass through on the medium circulation direction, the seal cover subassembly corresponds the seal receptacle slope sets up.

Further, the seal receptacle sets up on the seal receptacle mount pad, the seal receptacle mount pad is fixed through the backup pad in the trip valve casing, the seal receptacle mount pad with welded connection between the backup pad.

Furthermore, one end of the sealing seat close to the medium inlet is obliquely and downwards arranged, one end of the shut-off valve shell close to the medium inlet is provided with an inlet guide plate, and one end of the shut-off valve shell close to the medium outlet is provided with an outlet guide plate.

Further, an inlet flange and an outlet flange are respectively arranged at the medium inlet and the medium outlet.

Further, the trip valve casing includes the main barrel, the both ends welded connection of main barrel has the reducing joint, welded connection respectively has in the outside of reducing joint the entry flange with the export flange, correspond the installation barrel that actuating mechanism was equipped with the slope setting on the trip valve casing, be provided with actuating mechanism mounting flange on the installation barrel, the installation barrel with main barrel welded connection, actuating mechanism mounting flange with installation barrel welded connection, actuating mechanism passes through the actuating mechanism mounting panel and installs on the actuating mechanism mounting flange.

Furthermore, the actuating mechanism comprises a spring cylinder, a spring is arranged in the spring cylinder, the spring pushes a piston towards the oblique lower part of the spring cylinder, an inflation inlet is further formed in the spring cylinder, an air outlet is formed in the upper end of the spring cylinder, the piston can be pushed to jack towards the interior of the spring cylinder by inflation through the inflation inlet, the piston is connected with a cylinder shaft extending towards the exterior of the spring cylinder, and the front end of the cylinder shaft is connected with the sealing cover assembly through a shaft connecting piece.

Further, the sealed lid subassembly includes sealed lid guiding axle, the lower extreme of sealed lid guiding axle is provided with sealed lid mount pad, the cover is equipped with the sealing washer on the sealed lid mount pad, and the end cover dress is in on the sealing washer and will the lateral surface of sealing washer exposes, the end cover passes through the bolt will the sealing washer is fixed on the sealed lid mount pad, the lateral surface of sealing washer is the conical surface of invering from supreme down.

Further, the actuating mechanism mounting panel pass through coupling bolt with actuating mechanism mounting flange fixed connection, the actuating mechanism mounting panel with be equipped with sealed step between the actuating mechanism mounting flange, be equipped with sealed the pad on the sealed step.

Furthermore, the actuating mechanism mounting plate is provided with a mounting bracket, the spring cylinder is fixed at the upper end of the mounting bracket through a bolt, the mounting bracket is provided with a shaft seal corresponding to the sealing cover guide shaft, and the actuating mechanism mounting plate is also provided with a guide sleeve corresponding to the sealing cover guide shaft.

Furthermore, the seal receptacle is locked on the seal receptacle mounting seat through a bolt, the periphery of the seal receptacle corresponds to the seal receptacle mounting seat and is provided with a seal ring mounting groove, and an O-shaped seal ring is arranged in the seal ring mounting groove.

The stop valve of the combustible non-standard gas burner has the advantages that the sealing seat is obliquely arranged, so that the sealing seat forms a circulation port capable of allowing a gas medium to pass through in the medium circulation direction, the sealing cover assembly is obliquely arranged corresponding to the sealing seat, when the medium passes through the sealing cover assembly and the sealing seat, the movement direction of the gas medium is not changed, the fluid resistance is small, the pressure loss is small, the energy consumption is low, the gas medium can be normally combusted, and the phenomenon that the impurity deposition is easily caused when the gas containing impurities flows through a place with high resistance in the valve body is avoided.

Drawings

FIG. 1 is a schematic view of a low flow resistance shut-off valve for a combustible non-standard gas burner of the present invention;

FIG. 2 is a schematic view of the shut-off valve when open;

FIG. 3 is a schematic view of a shutoff valve housing;

fig. 4 is a schematic view of a seal seat.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, wherein the drawings provided in the present embodiments illustrate the basic idea of the invention only in a schematic way, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complex.

Referring to fig. 1 to 4, the low flow resistance cut-off valve for a combustible non-standard gas burner comprises a cut-off valve shell 1, wherein a medium inlet 2 and a medium outlet 3 are respectively arranged at two ends of the cut-off valve shell 1, a sealing seat 4 is arranged in the cut-off valve shell 1, an executing mechanism 5 is arranged on the cut-off valve shell 1 and above the sealing seat 4, the lower end of the executing mechanism 5 extends into the cut-off valve shell 1 and is connected with a sealing cover assembly 6, the executing mechanism 5 can drive the sealing cover assembly 6 to move, the sealing cover assembly 6 can be matched and sealed with the sealing seat 4 to block an inner cavity of the cut-off valve shell 1 into two cavities, the sealing seat 4 is obliquely arranged, so that the sealing seat 4 forms a circulation port 16 through which a medium can pass in a medium circulation direction, and the sealing cover assembly 6.

In the present embodiment, the seal seat 4 is disposed on the seal seat mounting seat 15, the seal seat mounting seat 15 is fixed in the cut-off valve housing 1 through the support plate 17, and the seal seat mounting seat 15 is welded to the support plate 17.

Specifically, the one end slope that seal receptacle 4 is close to medium entry 2 sets up downwards, and the one end that the shut-off valve case 1 is close to medium entry 2 is provided with entry guide plate 18, and the one end that the shut-off valve case 1 is close to medium export 3 is provided with export guide plate 19, and entry guide plate 18 and export guide plate 19's setting for gaseous medium is when passing through the trip valve, through the direction of entry guide plate 18 and export guide plate 19, makes the flow resistance littleer.

In addition, the positions of the medium inlet 2 and the medium outlet 3 are respectively provided with an inlet flange 20 and an outlet flange 21, so that the installation and the connection of the shut-off valve are convenient.

Specifically, in the present embodiment, the cutoff valve housing 1 is provided with an inclined mounting cylinder 7 corresponding to the actuator, the mounting cylinder 7 is provided with an actuator mounting flange 8, and the actuator 5 is mounted on the actuator mounting flange 8 through an actuator mounting plate 9.

Specifically in this embodiment, trip valve casing 1 includes main barrel 101, the both ends welded connection of main barrel 101 has reducing joint 102, there are inlet flange 20 and outlet flange 21 in reducing joint 102's the outside welded connection respectively, it is equipped with the installation barrel 7 that the slope set up to correspond actuating mechanism on the trip valve casing 1, be provided with actuating mechanism mounting flange 8 on the installation barrel 7, installation barrel 7 and main barrel 101 welded connection, actuating mechanism mounting flange 8 and installation barrel 7 welded connection, actuating mechanism passes through actuating mechanism mounting panel 9 and installs on actuating mechanism mounting flange.

The valve body of the full-welding structure can replace various cast and forged valve bodies, and the environmental pollution is reduced.

Specifically, the actuating mechanism comprises a spring cylinder 501, a spring 502 is arranged in the spring cylinder 501, the spring 502 pushes a piston 503 towards the oblique lower side of the spring cylinder 501, an air charging port 504 is further arranged on the spring cylinder, an air outlet 505 is arranged at the upper end of the spring cylinder, the piston 503 can be pushed to lift towards the spring cylinder by inflating through the air charging port 504, the piston 503 is connected with a cylinder shaft 506 extending towards the outside of the spring cylinder, and the front end of the cylinder shaft 506 is connected with the sealing cover assembly 6 through a shaft connecting piece.

Specifically, in this embodiment, the sealing cover assembly 6 includes the sealing cover guide shaft 601, the lower end of the sealing cover guide shaft 601 is provided with the sealing cover mounting seat 602, the sealing cover mounting seat 602 is sleeved with the sealing ring 603, the sealing end cover 604 covers the sealing ring 603 and exposes the outer side surface of the sealing ring 603, the sealing end cover 604 fixes the sealing ring 603 on the sealing cover mounting seat 602 through the bolt, the outer side surface of the sealing ring 603 is an inverted conical surface from bottom to top, the outer side surface of the sealing ring 603 is a part matched with the sealing seat 4, the outer side surface of the sealing ring 603 is an inverted conical surface from bottom to top, so that the sealing ring can better contact with the sealing seat 4, the sealing effect is improved, it is ensured that the valve is closed to enable.

The sealing structure has the advantages that the conical sealing ring and the sealing seat are matched for sealing, good guiding can be carried out in the sealing process, the sealing contact area is large, the sealing surface is not easy to damage and accurate in alignment, sealing is more reliable and durable, the sealing structure is particularly used for containing impurities, the impurities are not easy to attach firmly when the sealing surface is coated with lubricating grease during component media, the sealing surface is always in a high-temperature state, the impurities attached to the sealing surface are not easy to harden firmly, and in the sealing and closing process, the impurities are cleaned to realize normal sealing performance.

In the embodiment of the invention, the actuator mounting plate 9 is fixedly connected with the actuator mounting flange 8 through a connecting bolt, a sealing step 10 is arranged between the actuator mounting plate and the actuator mounting flange, and a sealing gasket 11 is arranged on the sealing step 10 and used for further ensuring the sealing performance of the cut-off valve.

In the embodiment of the invention, the actuator mounting plate 9 is provided with a mounting bracket 12, the spring cylinder 501 is fixed at the upper end of the mounting bracket 12 through a bolt, the mounting bracket 12 is provided with a shaft seal 13 corresponding to the seal cover guide shaft, and the actuator mounting plate 9 is also provided with a guide sleeve 14 corresponding to the seal cover guide shaft 601; the arrangement of the guide sleeve can ensure that the sealing cover component does not generate directional deviation in the moving process, and the sealing reliability of the cut-off valve is ensured.

In one embodiment of the present invention, the seal seat 4 is locked to the seal seat mounting seat 15 by bolts, and the outer periphery of the seal seat 4 is provided with a seal ring mounting groove 401 corresponding to the seal seat mounting seat, and an O-ring 22 is disposed in the seal ring mounting groove.

The valve belongs to a quick-wear part, the number of the valves needing to be replaced every year due to sealing failure in many industries is particularly huge, the cut-off valve is designed for realizing universal replacement and interchange with the existing or used cast and forged valves in the market, and after the valve is replaced, the use function can be restored only by replacing the sealing ring and the sealing seat after the sealing failure, so that a large amount of funds are saved for the country.

The stop valve is provided with the execution device for driving the sealing cover assembly to be matched with the sealing seat, the valve consisting of the sealing cover assembly and the sealing seat is a normally closed valve under the action of the spring cylinder of the execution device, gas is introduced from a gas supply system to the burner through the stop valve to burn only when gas supply is needed, the gas supply of the spring cylinder can be cut off once abnormal occurs by inflating the spring cylinder and driving the sealing cover assembly to be separated from the sealing seat through the spring cylinder, the valve is closed rapidly under the action of the spring, safety accidents such as combustion and explosion are prevented, and the reliability is good.

The shut valve operation of the present invention will be explained below:

1. when the valve needs to be opened, compressed air is injected from the inflation inlet to push the piston to move upwards, the spring in the cylinder is compressed, the piston drives the cylinder shaft, the shaft connecting piece and the sealing cover component to move upwards together, the sealing ring leaves the sealing seat, and the valve is opened;

2. after the valve is opened, the sealing piston does not move any more, compressed air pushes the sealing piston all the time, the conical surface seal is separated from the sealing seat by a certain distance, and a gas medium passes through the space between the conical surface seal and the sealing seat;

3. when the valve needs to be closed, compressed air is switched through the external multi-way valve, the air injection into the cylinder body is stopped, the compressed air is converted into outward exhaust, after the compressed air pushing the piston is removed, the compressed spring rebounds to push the piston downwards, the cylinder shaft, the shaft connecting piece and the sealing cover component are driven to move downwards together, the conical surface formed by the sealing ring falls back to the sealing surface of the sealing seat in a sealing mode, the medium is blocked by the conical surface seal and the sealing seat, and the valve is closed.

The stop valve of the combustible nonstandard gas burner has the advantages that the sealing seat is obliquely arranged, so that the sealing seat forms a circulation port through which a gas medium can pass in the medium circulation direction, the sealing cover assembly is obliquely arranged corresponding to the sealing seat, when the medium passes through the sealing cover assembly and the sealing seat, the movement direction of the gas medium is not changed, the fluid resistance is small, the pressure loss is small, the energy consumption is low, the gas medium can be normally combusted, the impurity deposition caused by the fact that the gas containing impurities flows in a place with high resistance in the valve body is avoided, and the stop valve is very suitable for a combustion system requiring low pressure loss.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a low flow resistance trip valve for flammable nonstandard gas combustion ware, includes the trip valve casing, the both ends of trip valve casing are provided with medium entry and medium export respectively, be provided with the seal receptacle in the trip valve casing on, be located the top of seal receptacle is provided with actuating mechanism, actuating mechanism's lower extreme stretches into be connected with the seal cover subassembly in the trip valve casing, actuating mechanism can drive the removal of seal cover subassembly, the seal cover subassembly can with the seal receptacle cooperation is sealed, will two cavitys, its characterized in that are blocked to the inner chamber of trip valve casing: the seal seat is obliquely arranged, so that the seal seat forms a circulation port capable of allowing a medium to pass through in the medium circulation direction, and the seal cover assembly is obliquely arranged corresponding to the seal seat.

2. A low flow resistance shut-off valve for a combustible non-standard gas burner as claimed in claim 1, wherein: the seal receptacle sets up on the seal receptacle mount pad, the seal receptacle mount pad is fixed through the backup pad in the trip valve casing, the seal receptacle mount pad with welded connection between the backup pad.

3. A low flow resistance shut-off valve for a combustible non-standard gas burner as claimed in claim 2, wherein: the seal seat is arranged at one end, close to the medium inlet, of the seal seat in an inclined downward mode, an inlet guide plate is arranged at one end, close to the medium inlet, of the cut-off valve shell, and an outlet guide plate is arranged at one end, close to the medium outlet, of the cut-off valve shell.

4. A low flow resistance shut-off valve for a combustible non-standard gas burner as claimed in claim 2, wherein: and the positions of the medium inlet and the medium outlet are respectively provided with an inlet flange and an outlet flange.

5. A low flow resistance shut-off valve for a combustible non-standard gas burner as claimed in claim 1, wherein: the trip valve casing includes the main barrel, the both ends welded connection of main barrel has the reducing joint, welded connection is respectively in the outside of reducing joint the entry flange with the export flange, correspond the installation barrel that actuating mechanism was equipped with the slope setting on the trip valve casing, be provided with actuating mechanism mounting flange on the installation barrel, the installation barrel with main barrel welded connection, actuating mechanism mounting flange with installation barrel welded connection, actuating mechanism passes through the actuating mechanism mounting panel and installs on the actuating mechanism mounting flange.

6. A low flow resistance shut-off valve for a combustible non-standard gas burner as claimed in claim 5, wherein: the actuating mechanism comprises a spring cylinder, a spring is arranged in the spring cylinder, the spring pushes a piston towards the oblique lower side of the spring cylinder, an inflation inlet is further formed in the spring cylinder, an air outlet is formed in the upper end of the spring cylinder, the piston can be pushed to jack the spring cylinder by inflation through the inflation inlet, the piston is connected with a cylinder shaft extending towards the outer portion of the spring cylinder, and the front end of the cylinder shaft is connected with the sealing cover assembly through a shaft connecting piece.

7. A low flow resistance shut-off valve for a combustible non-standard gas burner as claimed in claim 6, wherein: the sealing cover assembly comprises a sealing cover guide shaft, a sealing cover mounting seat is arranged at the lower end of the sealing cover guide shaft, a sealing ring is sleeved on the sealing cover mounting seat, a sealing end cover covers the sealing ring and exposes the outer side surface of the sealing ring, the sealing end cover fixes the sealing ring on the sealing cover mounting seat through a bolt, and the outer side surface of the sealing ring is an inverted conical surface from bottom to top.

8. A low flow resistance shut-off valve for a combustible non-standard gas burner as claimed in claim 7, wherein: the actuating mechanism mounting panel pass through coupling bolt with actuating mechanism mounting flange fixed connection, the actuating mechanism mounting panel with be equipped with sealed step between the actuating mechanism mounting flange, be equipped with sealed the pad on the sealed step.

9. A low flow resistance shut-off valve for a combustible non-standard gas burner as claimed in claim 8, wherein: the actuating mechanism mounting plate is provided with a mounting support, the spring air cylinder is fixed at the upper end of the mounting support through a bolt, the mounting support is provided with a shaft seal corresponding to the sealing cover guide shaft, and the actuating mechanism mounting plate is further provided with a guide sleeve corresponding to the sealing cover guide shaft.

10. A low flow resistance shut-off valve for a combustible non-standard gas burner as claimed in claim 2, wherein: the seal holder is locked on the seal holder mounting seat through bolts, a seal ring mounting groove is formed in the periphery of the seal holder corresponding to the seal holder mounting seat, and an O-shaped seal ring is arranged in the seal ring mounting groove.