CN216520914U

CN216520914U - LPG heating system with parallel connection and cut-off function

Info

Publication number: CN216520914U
Application number: CN202123020696.9U
Authority: CN
Inventors: 梁爽
Original assignee: Tianjin Huamai Environmental Protection Equipment Co ltd
Current assignee: Tianjin Huamai Environmental Protection Equipment Co ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-05-13
Anticipated expiration: 2031-12-03

Abstract

The invention provides an LPG heating system with a parallel connection cutting-off function, which comprises a heater, a supply side pipeline and an air using side pipeline, wherein safety valves are respectively arranged on the supply side pipeline and the air using side pipeline; the air side pipeline is connected to the outlet of the heater; a temperature transmitter and a pressure transmitter are also arranged on the gas-side pipeline; a first communication pipeline and a second communication pipeline are connected in parallel between the supply side pipeline and the heater inlet; the supply side pipeline is also connected with a bypass pipeline which is directly connected with the gas side pipeline, and a bypass stop valve is arranged on the bypass pipeline. In the heating system provided by the invention, the first communicating pipeline and the second communicating pipeline which are arranged in parallel are both provided with the stop valves, so that double guarantee is provided for heating when LPG enters the heater, and the equipment is safer.

Description

LPG heating system with parallel connection and cut-off function

Technical Field

The invention belongs to the technical field of LPG gasification heating, and particularly relates to an LPG heating system with a parallel connection cutting-off function.

Background

LPG is one of petroleum products, and is mainly applied to industries such as automobiles, urban gas, non-ferrous metal smelting, metal cutting and the like. Most of the liquefied petroleum gas needs to be transported or delivered in a liquid form, and when the liquefied petroleum gas is supplied to a client for use, the liquefied petroleum gas needs to be heated and gasified into a gaseous state, and then the gaseous liquefied petroleum gas is supplied to a user through a gas supply pipe network. In addition, in cold seasons or low-temperature areas, it is difficult to convert liquefied petroleum gas into a gaseous state, and there are many residual gases, which makes it difficult to use the liquefied petroleum gas and wastes energy, and therefore, it is also necessary to heat the liquefied petroleum gas. In the prior art, most of LPG is directly introduced into heating equipment for heating, the working pressure of the heating equipment is high, the use safety and the controllability are poor, and particularly, when a pipeline breaks down, the condition of gas supply interruption is easy to occur due to the fact that a standby scheme is not available, so that improvement is needed.

Disclosure of Invention

In view of the above, the present invention provides an LPG heating system with a parallel shut-off function to overcome the drawbacks of the prior art.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

an LPG heating system with a parallel connection cutting-off function,

the device comprises a heater, a supply side pipeline and an air side pipeline, wherein safety valves are respectively arranged on the supply side pipeline and the air side pipeline; the gas side pipeline is connected with the outlet of the heater; a temperature transmitter and a pressure transmitter are also arranged on the gas-side pipeline;

a first communicating pipeline and a second communicating pipeline are connected in parallel between the supply side pipeline and the heater inlet; a first stop valve and a first cut-off valve are installed on the first communicating pipeline, and a second stop valve and a second cut-off valve are installed on the second communicating pipeline; the first stop valve, the first cut-off valve, the second stop valve and the second cut-off valve are all interlocked with the outlet temperature transmitter,

the supply side pipeline is also connected with a bypass pipeline which is directly connected with the gas side pipeline, and a bypass stop valve is arranged on the bypass pipeline.

Further, an outlet stop valve is further installed on the gas-side pipeline.

Further, the safety valve on the gas-side pipeline is arranged downstream of the temperature transmitter and the pressure transmitter, and the outlet shutoff valve is arranged downstream of the safety valve.

Further, the heater comprises a body and a heating device in the body.

Further, the inlet is arranged at the lower part of the body, and the outlet is arranged at the upper part of the body.

Furthermore, the heating device comprises heating rods respectively arranged at the upper end and the lower end of the body, and each heating rod is connected with the temperature transmitter.

Further, a relief valve on the supply-side pipe is disposed upstream of each shut-off valve.

Further, a thermometer is also installed on the supply-side pipeline.

Compared with the prior art, the invention has the following advantages:

in the heating system provided by the invention, the heater is used for increasing the temperature of the LPG so as to fully gasify the LPG, the first communicating pipeline and the second communicating pipeline which are arranged in parallel are respectively provided with the stop valve, thus double guarantee is provided for the LPG to enter the heater for heating, the equipment is safer, and in addition, the gas can be directly supplied through the bypass pipeline under the condition of not heating and temperature rising, the work load of the heater is lightened, and the use cost is also saved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:

FIG. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of an embodiment of the present invention with a partition.

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.

An LPG heating system with parallel shut-off, as shown in figures 1 and 2,

the device comprises a heater 1, a supply side pipeline 2 and an air side pipeline 3, wherein safety valves are arranged on the supply side pipeline and the air side pipeline; the gas-side pipeline is connected to the heater outlet 5; a temperature transmitter 7 and a pressure transmitter 8 are also arranged on the gas-side pipeline; an outlet stop valve 17 is also installed on the gas side pipeline.

A first communication pipeline 9 and a second communication pipeline 10 are connected in parallel between the supply side pipeline and the heater inlet 6; a first stop valve 11 and a first cut-off valve 12 are installed on the first communicating pipeline, and a second stop valve 13 and a second cut-off valve 14 are installed on the second communicating pipeline; the first stop valve, the first cut-off valve, the second stop valve and the second cut-off valve are interlocked with the outlet temperature transmitter, so that the temperature of the LPG gas is kept in a required range.

A bypass line 15 is connected to the supply side line, and is directly connected to the gas side line, and a bypass cut-off valve 16 is installed in the bypass line. Typically, the safety valve 24 on the gas side line described above is arranged downstream of the temperature transmitter and the pressure transmitter, and the outlet shutoff valve is arranged downstream of the safety valve on the gas side line. The safety valve 4 on the supply-side line is arranged upstream of each shut-off valve.

The heater includes a body 18 and a heating device 20 within the body. The inlet is arranged at the lower part of the body, and the outlet is arranged at the upper part of the body. The heating device comprises electric heating rods 19 which are respectively arranged at the upper end and the lower end of the body, and the electric heating rods are interlocked with the temperature transmitter.

The LPG can be gasified and heated by the electric heating rod, and the starting and stopping of the electric heating rod are controlled by the outlet temperature transmitter. In order to effectively protect the structure of the tail end of the electric heating rod exposed out of the body, in an alternative embodiment, a plurality of supporting legs 21 are symmetrically arranged at the lower end of the body, and a lower protection space 25 is formed inside each supporting leg; the upper end of the body is provided with a protective sleeve 22, and an upper protective space is formed inside the protective sleeve. The protective sleeve can be provided with a wire passing port so as to facilitate the penetration of the cable.

In an optional embodiment, a partition plate 23 is installed inside the body, specifically, the partition plate may be disposed at a middle position in the height direction of the body, so that the inside of the body is partitioned into an upper cavity and a lower cavity, the upper heating rod is responsible for heating the upper cavity, and the lower heating rod is responsible for heating the lower cavity, thereby minimizing interference between the two cavities. When the structure is designed, only the upper heating rod or the lower heating rod is started when the heating power is required to be small, and only half of the cavity in the heater is in heating operation.

And the upper heating rod and the lower heating rod can be controlled by the main controller to realize alternate work, so that the work load of the heating rods is effectively reduced, the service life of the heating device is prolonged, and the energy-saving and environment-friendly effects are good. Even if one heating rod breaks down, the other heating rod still can heat, the heating function can not be failed, and the reliability of the heating and warming functions is effectively guaranteed.

When the full-power work is needed, the upper heating rod and the lower heating rod are simultaneously started. It should be pointed out that, the design form of heating rod is packed into respectively at body upper and lower both ends, the assembly operation of being convenient for very much, when the heating rod is maintained in installation and dismantlement, the narrow and small space of being more convenient for utilize reduces the space restriction, and the operation convenience is stronger.

Typically, a thermometer 26 is also mounted on the supply side line. When LPG enters the system, the upstream gas pressure is stable. When the air inlet pressure is too high, the safety valve on the supply side pipeline releases the pressure, the thermometer displays the temperature of the inlet air, and the temperature of the outlet of the system can reach the requirement of a user by arranging two parallel stop valves. The opening and closing pressure of the two ways of cut-off valves are set to be the same, when one way of cut-off valves breaks down, the other way of cut-off valves is started, a set of spare conveying pipelines are added, even if one connecting pipeline breaks down, the gas supply cannot be interrupted, the LPG supply stability is good, and the reliability is high.

Meanwhile, a bypass pipeline is further arranged, when the temperature of the incoming air is in a range required by a user, the LPG is directly supplied to the gas using side pipeline by the bypass pipeline when heating is not needed, the function of remotely transmitting the gas pressure and the temperature in real time is arranged on the gas using side pipeline, and the pressure is released through a safety valve when the gas pressure is too high. By way of example, each shut-off valve may be simultaneously coupled to a main controller that controls the opening and closing of the bypass shut-off valve based on thermometer signal feedback, and typically, when the bypass shut-off valve is opened, the first shut-off valve and the second shut-off valve that control the supply of the heater are closed.

Of course, the main controller may be used to automatically control the interlocking action of the first and second shut-off valves, i.e., the second shut-off valve is closed when the first shut-off valve is opened, and the second shut-off valve is opened while the first shut-off valve is closed when the first communication path portion fails. The main controller can be a PLC controller. The conventional action and function of the valve realized by the valve in the control pipeline belong to the category of the prior art, so the description is omitted.

In the heating system provided by the invention, the first communicating pipeline and the second communicating pipeline which are arranged in parallel are both provided with the stop valves, so that double guarantee is provided for heating the LPG entering the heater, the equipment is safer, the temperature of the LPG is increased, and the LPG is fully gasified. In addition, under the condition of not needing heating and temperature rise, the air can be directly supplied through the bypass pipeline, the work load of the heater is lightened, and the use cost is also saved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.

Claims

1. The utility model provides a take LPG heating system of parallelly connected cutting function which characterized in that:

2. An LPG heating system with parallel shut-off function as claimed in claim 1, wherein: and an outlet stop valve is also arranged on the gas-side pipeline.

3. An LPG heating system with parallel shut-off function as claimed in claim 2, wherein: the safety valve on the gas side pipeline is arranged at the downstream of the temperature transmitter and the pressure transmitter, and the outlet stop valve is arranged at the downstream of the safety valve.

4. An LPG heating system with parallel shut-off function as claimed in claim 1, wherein: the heater comprises a body and a heating device in the body.

5. An LPG heating system with parallel shut-off function as claimed in claim 4, wherein: the inlet is arranged at the lower part of the body, and the outlet is arranged at the upper part of the body.

6. An LPG heating system with parallel shut-off function as claimed in claim 4, wherein: the heating device comprises heating rods respectively arranged at the upper end and the lower end of the body, and each heating rod is connected with the temperature transmitter.

7. An LPG heating system with parallel shut-off function as claimed in claim 1, wherein: a safety valve on the supply-side line is arranged upstream of each shut-off valve.

8. An LPG heating system with parallel shut-off function as claimed in claim 1, wherein: and a thermometer is also arranged on the supply side pipeline.