CN114962724A - General pressure switch of integrated form relief valve and gas equipment - Google Patents

Abstract

The application provides a general pressure switch of integrated form relief valve and gas equipment. The integrated safety valve universal pressure switch is used for controlling a safety valve of gas equipment, and comprises a one-way valve, a commander, a pneumatic control reversing valve, a manual cut-off valve, a reset valve, a remote cut-off electromagnetic valve and a pressure release valve which are integrated on a main valve body and an auxiliary valve body, and all the components are connected through an internal channel in the valve body. And a monitoring input port of the commander is connected to a valve rear pipeline of the safety valve, and when overpressure occurs, the commander controls the pneumatic control reversing valve to output driving air pressure to drive a pneumatic actuator of the safety valve to execute cutting-off operation. The gas equipment comprises the integrated safety valve universal pressure switch and the safety valve, and a valve rear pipeline of the safety valve is connected to the monitoring input port, so that the integrated safety valve universal pressure switch controls the opening and closing of the safety valve according to the pressure of the valve rear pipeline. The safety valve is compact in structure and reliable in function, and can be used as a general component to be applied to control various safety valves.

Description

General pressure switch of integrated form relief valve and gas equipment

Technical Field

The application relates to the technical field of fluid pressure actuating mechanisms, in particular to an integrated safety valve universal pressure switch and a gas device.

Background

A safety valve assembly is generally disposed on a gas pipeline, wherein a pressure switch such as a pressure trigger mechanism or a commander for sensing and triggering pressure is a key component of the safety valve assembly. The pressure switch is mainly used for sensing whether the monitored pressure exceeds the set air pressure or not and judging whether the safety valve needs to be closed immediately or not. If the pressure switch has a pressure sensing capacity fault, cannot send a cutting-off instruction to the safety valve, or other external factors cause that the cutting-off instruction cannot be sent to the safety valve, safety accidents such as fire, explosion and the like occur to equipment at the downstream of the safety valve, and casualties and economic losses are caused. Therefore, the safety valve assembly on the gas pipeline is an extremely important component, and the matched pressure trigger mechanism is a key component.

At present, pressure switches with specially designed pressure switches and pressure switches used by safety valves with different structures manufactured by manufacturers at home and abroad, such as a stop safety valve and an axial flow safety valve, and a pneumatic safety valve and a mechanical safety valve, are part of integral parts of equipment, need to be designed and manufactured in a targeted manner, and need to be linked with the valves for detection during detection, and are not a pressure switch capable of being independently detected and used, so that pressure trigger mechanisms used for different types of safety valves cannot be mutually used.

The above setting method has the following disadvantages:

1. because each safety valve leaves a factory and uses a special pressure trigger mechanism, the performance cannot be unified and stable;

2. different spare parts are needed for maintaining different pressure trigger mechanisms;

3. parts with similar functions but different specifications need to be arranged on the production and the manufacturing, so that the storage pressure is increased;

4. the production efficiency is low, and the mass production and the manufacture cannot be realized;

5. the pressure switch and other safety valve components need to be connected through more external pipelines, so that the installation is complex, and the reliability is poor.

Disclosure of Invention

In view of the above disadvantages in the prior art, an object of the present application is to provide an integrated safety valve universal pressure switch, which is integrated into a whole, is easy and convenient to install, and has better versatility and reliability, and a gas appliance based on the universal pressure switch.

In order to achieve the above object, the present application provides the following technical solutions.

An integrated safety valve universal pressure switch for controlling a safety valve of a gas appliance, comprising: the pilot comprises a main valve body and a regulator, wherein the main valve body is provided with a monitoring input port, a driving input port and a driving output port, the monitoring input port is used for connecting a gas pipeline to be monitored, and the regulator is used for regulating set gas pressure for triggering the pilot to act; the pneumatic control reversing valve is provided with an auxiliary valve body, a reversing control port, a reverser input port and a first output port; the reversing control port is connected to the driving output port, the driving input port and the driving output port form a control gas path, the first output port and the reverser input port form a first reversing gas path, and the first output port is used for being connected to a pneumatic actuator of the safety valve; the auxiliary valve body is fixed to the main valve body, the reversing control port is connected with the driving output port through a first internal channel arranged in the auxiliary valve body, the driving input port is connected with the commutator input port through a second internal channel arranged in the main valve body, and the driving input port is used for being connected to a driving air source; when the pressure of the monitoring input port is larger than the set air pressure, the control air path changes the communication state, and the pneumatic actuator is controlled to cut off the safety valve after the first reversing air path changes the communication state.

In some embodiments, further comprising a pressure reducer; the main valve body is integrally machined, the pressure reducer comprises an end cover, at least part of the pressure reducer is located in the main valve body, and the end cover is fixed to the main valve body; the high-pressure end of the pressure reducer is communicated with the driving input port, and the low-pressure end of the pressure reducer is connected with the second internal channel; one side surface of the auxiliary valve body is attached and fixed to one side surface of the main valve body; the commander is a normally closed commander, and the monitoring input port is used for being connected to a valve rear pipeline of the safety valve.

In some embodiments, the commander further includes an outer housing, a spring, and a diaphragm, one end of the outer housing fixes the diaphragm to the main valve body, so that a spring cavity and a monitoring cavity are respectively formed on two sides of the diaphragm, the spring is disposed in the spring cavity, the monitoring input port is communicated with the monitoring cavity, one end of the spring applies pressure to the diaphragm, the other end of the spring is connected to the regulator, and the regulator is used for regulating the pressure of the spring on the diaphragm, so as to regulate the set air pressure.

In some embodiments, the gas-fired equipment further comprises a one-way valve, the one-way valve is fixed on the main valve body, an inlet of the one-way valve is used for being connected to a gas source of the gas-fired equipment, and an outlet of the one-way valve is communicated with the driving input port.

In some embodiments, further comprising a manual shut-off valve having a manual operator, a shut-off valve primary input port, a shut-off valve secondary input port, and a shut-off valve output port; the main input port of the cut-off valve is communicated to the driving output port, the auxiliary input port of the cut-off valve is communicated with the second internal channel, and the output port of the cut-off valve is communicated to the reversing control port; the manual cut-off valve has a manual cut-off state and a normal state, which can be manually switched by the manual operator, in which the cut-off valve main input port and the cut-off valve output port are communicated; in the manual cut-off state, the auxiliary input port of the cut-off valve is communicated with the output port of the cut-off valve; the manual cut-off valve is partially integrated in the auxiliary valve body, and the manual operator is positioned outside the auxiliary valve body.

In some embodiments, further comprising an optional normally closed remote shutoff solenoid valve; the auxiliary valve body is provided with a first reserved opening connected with the reversing control opening, the main valve body or the auxiliary valve body is provided with a second reserved opening connected with the second internal channel, and two ends of a gas path of the remote cut-off electromagnetic valve are respectively connected to the first reserved opening and the second reserved opening to provide a bypass between the reversing control opening and the second internal channel.

In some embodiments, a pressure relief valve is further included; the pressure relief valve is fixedly connected to a third reserved port on the main valve body or the auxiliary valve body, and the third reserved port is communicated to the second internal channel; or the pressure relief valve is an optional part and is fixedly connected to the second reserved opening.

In some embodiments, the pneumatic reversing valve further has a second output port, and the second output port and the diverter input port form a second reversing gas path; the pneumatic control reversing valve has a starting state and a resetting state, and when the reversing control port is in a high-pressure state, the pneumatic control reversing valve enters the starting state to communicate the first reversing gas path; when the reversing control port is in a low-pressure state, the pneumatic reversing valve enters the reset state to enable the second reversing gas path to be communicated; the first and second output ports are for connection to a double-acting pneumatic actuator of the safety valve.

In some embodiments, a pressure gauge and a reset valve are also included; the reset valve includes a reset operator; the reset valve is at least partially positioned in the auxiliary valve body, the reset operator is positioned outside the auxiliary valve body, and the reset valve is provided with a reset gas circuit which is controlled by the reset operator and is communicated with the reversing control port and the external space and used for controlling the pneumatic reversing valve to reset; the pressure gauge is fixed to the sub valve body or the main valve body and is communicated with the second internal passage.

The application also provides a gas equipment, includes: any of the integrated safety valve universal pressure switch and safety valve described above; and the rear valve pipeline of the safety valve is connected to the monitoring input port, so that the integrated safety valve universal pressure switch controls the safety valve to be opened and closed according to the pressure of the rear valve pipeline.

Various embodiments of the present application have at least one of the following technical effects:

1. the integrated safety valve universal pressure switch has the advantages of simple and convenient installation, better universality and reliability, small occupied space and suitability for batch production;

2. the commander, the pressure reducer and the one-way valve with close functional relevance are integrated to form a commander module, and the pneumatic reversing valve, the manual cut-off valve and the reset valve with close functional relevance are integrated to form a pneumatic reversing valve module, so that the main valve body or the auxiliary valve body can be shared among all functional elements and are connected through internal channels in the main valve body and the auxiliary valve body, the modular design of the pressure switch is realized, the integral reliability of the pressure switch is improved, the quality control in batch production is facilitated, and the serialized design and the module sharing are facilitated;

3. the pressure switch with higher reliability, integration and generalization can reduce the number of spare parts of large-scale gas equipment, reduce the inventory pressure and reduce the maintenance workload;

4. the adaptability of the pressure switch is further improved by the optional remote cutoff solenoid valve, the pressure relief valve and the pressure gauge, and the occupied space of the pressure switch can be further reduced by sharing the connecting interface by part of functional elements;

5. through the arrangement of the first output port and the second output port, the pressure switch can drive the single-acting pneumatic actuator and the double-acting pneumatic actuator of the safety valve, and the adaptability and the universality of the pressure switch are further improved.

Drawings

The above features, technical features, advantages and modes of achieving the present invention will be described in detail in the following description of preferred embodiments in a clearly understandable manner by referring to the accompanying drawings.

FIG. 1 is a perspective view of one embodiment of an integrated relief valve universal pressure switch;

FIG. 2 is a schematic diagram of the operation of one embodiment of the integrated relief valve universal pressure switch;

FIG. 3 is a perspective view of another embodiment of an integrated relief valve universal pressure switch;

FIG. 4 is a perspective view of the director module of the embodiment of FIG. 3;

FIG. 5 is a perspective view of another perspective of FIG. 4;

FIG. 6 is a top view of the director module of the embodiment of FIG. 1;

FIG. 7 is a cross-sectional view of the director module of the embodiment of FIG. 1;

FIG. 8 is an enlarged view of detail A of FIG. 7;

FIG. 9 is a perspective view of the pneumatically controlled directional valve module of the embodiment of FIG. 3;

FIG. 10 is a perspective view of the alternate view of FIG. 9;

FIG. 11 is a partial cross-sectional view of another embodiment of an pneumatically controlled directional valve module;

FIG. 12 is a cross-sectional view of one embodiment of a pneumatically controlled directional valve;

FIG. 13 is a schematic view of the operation of the manual shut-off valve;

FIG. 14 is a schematic view of the operating conditions of the pneumatically controlled directional valve;

FIG. 15 is a schematic view of the overpressure shutoff operation of the embodiment of FIG. 2;

FIG. 16 is a schematic view of the operation of the manual shut-off operation of the embodiment of FIG. 2;

FIG. 17 is a schematic illustration of the operation of the remote shut-off operation of the embodiment of FIG. 2;

FIG. 18 is a schematic diagram illustrating the operation of the reset operation of the embodiment of FIG. 2;

FIG. 19 is a variation of FIG. 2;

FIG. 20 is a schematic illustration of the operation of the pneumatic actuator of the embodiment of FIG. 2;

the reference numbers illustrate:

100. the pilot valve comprises a pilot, 110, a main valve body, 111, a monitoring input port, 112, a driving input port, 113, a second reserved port, 114, a driving output port, 115, a second internal passage connecting port, 116, a second internal passage, 117, a spring cavity, 118, a monitoring cavity, 120, an outer shell, 130, a regulator, 140, a monitoring input pipe, 150, a mounting plate, 160, a spring, 170, a diaphragm, 180, a pilot valve stem, 200, a pneumatic reversing valve, 210, an auxiliary valve body, 211, a first output port, 212, a second output port, 213, a first reserved port, 214, a first internal passage connecting port, 215, a reversing input port, 216, a reversing control chamber, 217, a reversing control port, 220, a piston cap, 230, a reversing valve stem, 300, a pressure reducer, 400, a resetting valve, 410, a resetting operator, 420, a resetting valve core, 500, a manual cut-off valve, 510, a manual operator, 520, a manual valve core, 521. the remote control system comprises a main input port of a cut-off valve, 522 an auxiliary input port of the cut-off valve, 523 an output port of the cut-off valve, 600 a pressure gauge, 700 a one-way valve, 800 a pressure relief valve, 900 a remote cut-off electromagnetic valve, 991 a rear pipeline of the valve, 992 a driving air source, 993 an external space and 1000 a pneumatic actuator.

Detailed Description

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will describe the specific embodiments of the present application with reference to the accompanying drawings. The drawings in the following description are only examples of the present application, and it will be clear to a person skilled in the art that other drawings and other embodiments can be obtained from these drawings without inventive effort.

For the sake of simplicity, the figures only schematically show the parts relevant to the application, and they do not represent the actual structure of the product. In some of the figures, elements having the same structure or function are shown only schematically or only indicated. In this document, "one" means not only "only one" but also a case of "more than one". The term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, 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 present application can be understood in a specific case by those of ordinary skill in the art.

As shown in fig. 1 and 3, the components of the integrated pressure switch for safety valve are integrated into a whole and connected with each other through an internal channel in the valve body, so that a complex pipeline connection between the components is eliminated, and an independent pressure switch module is realized for controlling the safety valve of a gas appliance, thereby avoiding a field connection and installation mode of a plurality of components in the prior art.

The first embodiment. The present embodiment includes a commander 100 and a pneumatically controlled directional valve 200. As shown in fig. 2, 4 and 5, the pilot 100 includes a main valve body 110 and a regulator 130, the main valve body 110 having a monitoring input port 111, a drive input port 112, and a drive output port 114. The monitoring input port 111 is used for connecting a gas pipeline to be monitored, for example, referring to fig. 6, a monitoring input pipe 140 is connected to the monitoring input port 111 for connecting to a post-valve pipeline 991 of a safety valve of a gas appliance. The regulator 130 is used to regulate the set air pressure for triggering the operation of the commander 100. Also secured to the main valve body 110 is a mounting plate 150 for securing the entire integrated safety valve universal pressure switch to a gas appliance.

As shown in fig. 9, 10 and 12, the pneumatically controlled directional valve 200 has a sub valve body 210, a piston cap 220 and a directional valve stem 230, and a directional control port 217 (see fig. 14, the directional control port 217 is located inside the sub valve body 210, not shown in fig. 12), a diverter input port 215, and a first output port 211 are provided in the sub valve body 210. The reversing control port 217 is connected to the driving output port 114 of the main valve body 110 through a first internal channel (not shown) provided in the sub valve body 210 and a first internal channel connection port 214 provided in the sub valve body 210, the reversing control port 217 is communicated with the reversing control chamber 216, and the reversing valve rod 230 is controlled to move by changing the internal pressure of the reversing control chamber 216, so that the reversing operation is realized. A control air passage is formed between the drive input port 112 and the drive output port 114 of the director 100, and a first output port 211 and a diverter input port 215 of the pneumatic control diverter valve 200 form a first diverting air passage. The first output 211 is used for a pneumatic actuator 1000 (see the schematic operating principle of fig. 2) connected to a safety valve of a gas appliance.

The sub-valve body 210 is fixed to the main valve body 110, the drive input port 112 and the diverter input port 215 are connected by a second internal passage 116 (see the internal structure of the main valve body 110 shown in fig. 7) provided in the main valve body 110 and a second internal passage connection port 115 provided in the main valve body 110, and the drive input port 112 is for connection to a drive gas source 992. The drive air supply 992 is an air supply with sufficient pressure to drive the pneumatically controlled directional valve 200 after being connected to the directional control port 217 of the pneumatically controlled directional valve 200 to effect a directional change. Generally, an air source of a gas apparatus, an air source decompressed by a decompressor, a valve rear pipe 991 of a safety valve, and the like can be used as the driving air source 992, and the driving air source 992 with an appropriate pressure can also be independently arranged.

When the pressure input from the monitoring input port 111 is greater than the set air pressure of the commander 100, the commander 100 is triggered to control the air passage to change the communication state, so that the first reversing air passage of the pneumatic control reversing valve 200 changes the communication state and then controls the pneumatic actuator 1000 of the safety valve to cut off the safety valve, thereby realizing the switching function of the integrated safety valve universal pressure switch. The commander 100 can be a normally open commander or a normally closed commander, and the pipeline to be monitored can be a valve rear pipeline 991 of a safety valve, and can also be a gas source pipeline of gas equipment. Through setting up standardized connecting pipe spare for interfaces such as monitoring input port 111, drive input port 112, first delivery outlet 211, can be conveniently connected to different drive air supply 992, the pipeline that needs the monitoring etc. through setting for atmospheric pressure of regulator 130 adjustment director 100, make this embodiment can be applied to the relief valve and the gas pipeline of different parameters to integrated, modularization and universalization have been realized.

Example two. On the basis of the first embodiment, as also shown in fig. 1 and 3, the present embodiment further includes a pressure reducer 300. The main valve body 110 of the pilot 100 is integrally formed of an aluminum alloy, the pressure reducer 300 includes an end cap, and the pressure reducer 300 is at least partially located in the main valve body 110, and the pressure reducer 300 is fixed to the main valve body 110 by the end cap thereof, and constitutes a pilot module together with the pilot 100. In order to improve the storage or transmission efficiency, the pressure of the gas source of the gas equipment is usually high and can reach 10Mpa, and a large range from low pressure to high pressure is covered; while most gas-fired appliances are low pressure appliances, the gas pressure is much lower, e.g., typical gas pressures are 0.7Mpa or less. Therefore, it is usually necessary to provide a pressure reducer 300 for pressure adjustment. The high-pressure end of the pressure reducer 300 is connected to the gas source of the gas appliance through the driving input port 112, and the low-pressure end is communicated with the second internal passage 116; the diverter input port 215 of the pneumatically controlled diverter valve 200 is now connected to the drive input port 112 through the second internal passage 116 and the pressure reducer 300.

In order to realize the gas circuit connection between the sub valve body 210 and the main valve body 110, one side surface of the sub valve body 210 is attached and fixed to one side surface of the main valve body 110; and the sealing connection between the drive output port 114 of the main valve body 110 and the first internal passage connecting port 214 of the sub-valve body 210, and between the second internal passage connecting port 115 of the main valve body 110 and the commutator input port 215 of the sub-valve body 210 is achieved by providing seal grooves and O-rings. The commander 100 is a normally closed commander, and the commander 100 is at least partially located in the main valve body 110, and the monitoring input port 111 is used for connecting to a post-valve line 991 of a safety valve of a gas appliance to be controlled (see the working principle schematic diagram of fig. 2). In this embodiment, the pressure reducer 300 is integrated into the commander module, and shares the main valve body 110 of the commander 100, and from the material cost, only a valve core and an end cover need to be provided, which, compared with the prior art or the embodiment, not only can omit a pressure reducing device that needs to be separately arranged, but also can omit part of connecting pipelines and part of field installation operations, thereby reducing the equipment cost, the maintenance cost and the working reliability, being suitable for mass production, and facilitating the realization of quality control and performance detection; in the prior art, the related elements need to be installed on site and then are subjected to linkage detection, so that the workload is increased, special detection equipment is difficult to apply, and the reliability is poor.

Example three. On the basis of the above embodiments, the commander 100 is a spring diaphragm type commander commonly used in medium and low voltage equipment, as shown in fig. 7 and 8, and includes an outer housing 120, a spring 160 and a diaphragm 170; one end of the outer housing 120 is press-fit and fixed with the diaphragm 170 to a step structure at one end of the main valve body 110 to form a sealed connection, so that two sides of the diaphragm 170 respectively form a spring cavity 117 and a monitoring cavity 118, and the spring 160 is disposed in the spring cavity 117. Monitoring input port 111 communicates with monitoring chamber 118, one end of spring 160 applies pressure to one side of diaphragm 170 through internal structure, and the other end of spring 160 is connected to regulator 130, so that regulator 130 can be used to adjust the pressure of spring 160 against diaphragm 170, thereby adjusting the set air pressure that triggers actuation of pilot 100. As shown in fig. 8, when the pressure in the monitoring cavity 118 increases, so that the pressure on the upper side of the diaphragm 170 is greater than the pressure of the spring 160 below, the diaphragm 170 deforms downward, so that the commander valve stem 180 moves downward, the commander 100 is triggered to act, and the drive output port 114 supplies drive air pressure to the reversing control port 217 of the pneumatic reversing valve 200, so as to drive the pneumatic reversing valve 200 to act.

In addition to spring diaphragm type directors, the director 100 may also be implemented as a piston type pressure regulating director in higher pressure applications.

Example four. As shown in fig. 7, on the basis of the above embodiments, the present embodiment further includes a check valve 700, and the check valve 700 is fixed to the driving input port 112 of the main valve body 110, and forms a director module together with the director 100 and the pressure reducer 300. As shown in fig. 2, the inlet of the one-way valve 700 is used to connect to the gas source of the gas appliance, and the outlet of the one-way valve 700 is connected to the high-pressure end of the pressure reducer 300 through the drive input port 112. The check valve 700 is used for maintaining the pressure at the low-pressure end of the pressure reducer 300 under the condition that the driving air source 992 loses pressure, and the pneumatic actuator 1000 of the safety valve is prevented from automatically resetting after the driving air source 992 loses pressure.

Example five. On the basis of the above embodiment, as shown in fig. 9 and 10, the present embodiment further includes a manual shut-off valve 500. As shown in fig. 11 and 13, the manual cut valve 500 includes a manual operator 510, a manual valve core 520, and has a cut valve main input port 521, a cut valve sub-input port 522, and a cut valve output port 523; as shown in fig. 2 or 15, the shutoff valve main input port 521 is connected to the drive output port 114 of the commander 100 through the first internal passage and the first internal passage connection port 214, the shutoff valve sub-input port 522 is in communication with the second internal passage 116, that is, the low-pressure side pipe of the pressure reducer 300, and the shutoff valve output port 523 is connected to the switching control port 217 of the pneumatically-controlled switching valve 200.

As shown in fig. 13, the manual cut valve 500 has a manual cut state and a normal state that can be manually switched by a manual operator 510. In a normal state, as shown in fig. 13(a), the shutoff valve main input port 521 and the shutoff valve output port 523 are in communication, and the shutoff valve sub-input port 522 and the shutoff valve output port 523 are disconnected; in the manual shutoff state, as shown in fig. 13(b), the shutoff valve sub-input port 522 and the shutoff valve output port 523 are communicated, and the shutoff valve main input port 521 and the shutoff valve output port 523 are disconnected. As shown in fig. 15, in a normal state, the manual cut-off valve 500 provides a passage between the commander 100 and the reversing control port 217 of the pneumatic reversing valve 200, and the pneumatic reversing valve 200 is controlled by the commander 100; as shown in fig. 16, in the manual cut-off state, the manual cut-off valve 500 disconnects the connection between the commander 100 and the direction change control port 217 of the pneumatically controlled direction change valve 200, and connects the direction change control port 217 to the low-pressure side of the pressure reducer 300 through the direction changer input port 215, the second internal passage connection port 115, and the second internal passage 116, so that the pneumatically controlled direction change valve 200 performs the direction change operation immediately. Thus, emergency shut-off of the safety valve may be accomplished by manually operating the manual operator 510 in an emergency or other situation where it is desired. The manual operator 510 of the present embodiment is a button type operator.

As shown in fig. 11, the manual shut-off valve 500 is partially integrated within the sub-valve body 210, and the manual operator 510 is located outside the sub-valve body 210.

Example six. On the basis of the above embodiments, as shown in fig. 2 and 3, the present embodiment further includes an optional normally closed remote cut-off solenoid valve 900. As shown in fig. 9, the sub valve body 210 has a first reserved port 213 connected to the direction change control port 217; as shown in fig. 4, the main valve body 110 has a second reserve port 113 connected to the second internal passage 116; both ends of the gas path of the remote cut-off solenoid valve 900 are connected to the first reserved port 213 and the second reserved port 113, respectively, to provide a bypass between the reversing control port 217 and the second internal passage 116. The second reserve port 113 may also be provided on the sub-valve body 210 and communicate with the diverter input port 215 inside the sub-valve body 210 to communicate with the second internal passage 116 in the main valve body 110 through the diverter input port 215. The remote cut-off solenoid valve 900 can be arranged as required, and can also be disassembled to plug the first reserved port 213 and the second reserved port 113.

As shown in fig. 17, when the remote cut-off solenoid valve 900 receives a remote cut-off electrical signal, the normally closed gas circuit inside the remote cut-off solenoid valve is switched to a communicating state, so that the reversing control port 217 is communicated to the low-pressure end pipeline of the pressure reducer 300, i.e., the second internal passage 116, thereby reversing the pneumatic directional valve 200 and controlling the pneumatic actuator 1000 to cut off the safety valve.

Example seven. On the basis of the above embodiments, as shown in fig. 2 and 7, the present embodiment further includes a pressure relief valve 800; the pressure relief valve 800 is fixed to the second reserved port 113 on the main valve body 110, that is, the pressure relief valve 800 and the remote shutoff solenoid valve 900 are both optional parts and share the second reserved port 113. When a pressure relief device is already provided on other pipelines of the gas equipment, the pressure relief valve 800 can also be omitted. Of course, the relief valve 800 may be mounted to a third reserve port (not shown) additionally provided in the main valve body 110 or the auxiliary valve body 210, and only the third reserve port and the second internal passage 116 need to be communicated with each other.

Example eight. On the basis of the above embodiment, as shown in fig. 3 and 14, the pneumatic-control directional valve 200 further has a second output port 212. The pneumatic-control reversing valve 200 has a start state and a reset state, as shown in fig. 14(b), when the reversing control port 217 is in a high-pressure state, the pneumatic-control reversing valve 200 enters the start state, so that the first reversing gas path between the first output port 211 and the reverser input port 215 is communicated; when the reversing control port 217 is in a low pressure state, the pneumatically controlled reversing valve 200 returns to a reset state, thereby communicating the second reversing gas path between the second output port 212 and the diverter input port 215. The first output port 211 and the second output port 212 are used for connection to a double-acting type pneumatic actuator 1000 of a relief valve. As shown in fig. 19, when the pneumatic directional valve 200 is provided with only the first output port 211, the single-acting pneumatic actuator 1000 that can be used to control a safety valve is provided. When the first output port 211 and the second output port 212 are provided at the same time, the present embodiment can be used to drive both the single-acting type pneumatic actuator 1000 and the double-acting type pneumatic actuator 1000. Fig. 2 shows a normal operation state of the integrated relief valve common pressure switch, in which the pneumatic actuator 1000 is in a reset state as shown in fig. 20 (a); in fig. 15 to 17, the pneumatic actuator 1000 is in the operating state shown in fig. (b).

Example nine. As shown in fig. 1 and 2, on the basis of the above embodiments, the present embodiment further includes a pressure gauge 600 and a reset valve 400. The pressure gauge 600 is fixed to the sub-valve body 210, but may be fixed to the main valve body 110 and directly or indirectly communicates with the second internal passage 116 for detecting the pressure of the low-pressure side line of the pressure reducer 300. The pressure gauge 600 may also be mounted to the second reserve port 113 on the main valve body 110 when the remote shut-off solenoid valve 900 and the pressure relief valve 800 are not optional, because the second reserve port 113 also communicates with the second internal passage 116. As shown in fig. 11 and 18, the reset valve 400 includes a reset operator 410 and a reset spool 420; the reset valve 400 is partially integrated inside the sub-valve body 210, and the reset operator 410 is located outside the sub-valve body 210; the reset valve 400 has a reset air passage controlled by the reset operator 410 and connecting the reversing control port 217 and the external space 993 for controlling the pneumatic reversing valve 200 to reset. As shown in fig. 18, when the direction-changing control port 217 is in a high-pressure state and the pneumatically-controlled direction-changing valve 200 is in the activated state shown in fig. 14(b), the direction-changing control port 217 can be communicated with the external space 993 by manually operating the reset operator 410, so that the direction-changing control port 217 is returned to a low-pressure state and the pneumatically-controlled direction-changing valve 200 is returned to the reset state shown in fig. 14 (a).

In one embodiment of the gas appliance of the present application, the gas appliance includes the integrated safety valve universal pressure switch and safety valve of any of the foregoing embodiments. The safety valve comprises a single-acting or double-acting type pneumatic actuator 1000, the input end of the single-acting type pneumatic actuator 1000 is connected to the first output port 211 of the pneumatic control reversing valve 200, and the input end of the double-acting type pneumatic actuator 1000 is connected to the first output port 211 and the second output port 212 of the pneumatic control reversing valve 200. The rear valve line 991 of the safety valve is connected to the monitoring input port 111 of the integrated safety valve universal pressure switch, so that the integrated safety valve universal pressure switch controls the opening and closing of the safety valve according to the pressure of the rear valve line 991. When the pressure behind the safety valve exceeds the set air pressure, the director 100 of the integrated safety valve universal pressure switch triggers to control the first output port 211 and the second output port 212 of the pneumatic control directional valve 200 to output the driving air pressure, so as to drive the pneumatic actuator 1000 to close the safety valve.

The foregoing is only a preferred embodiment of the present application and the technical principles employed, and various obvious changes, rearrangements and substitutions may be made without departing from the spirit of the application. Other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. The present application is capable of other and different embodiments and its several details are capable of modifications and variations in various respects, all without departing from the spirit of the present application. The features in the above embodiments and embodiments may be combined with each other without conflict.

Claims (10)

1. An integrated safety valve universal pressure switch for controlling a safety valve of a gas appliance, comprising:

the pilot comprises a main valve body and a regulator, wherein the main valve body is provided with a monitoring input port, a driving input port and a driving output port, the monitoring input port is used for connecting a gas pipeline to be monitored, and the regulator is used for regulating set gas pressure for triggering the pilot to act;

the pneumatic control reversing valve is provided with an auxiliary valve body, a reversing control port, a reverser input port and a first output port;

the reversing control port is connected to the driving output port, the driving input port and the driving output port form a control gas path, the first output port and the reverser input port form a first reversing gas path, and the first output port is used for being connected to a pneumatic actuator of the safety valve;

the auxiliary valve body is fixed to the main valve body, the reversing control port is connected with the driving output port through a first internal channel arranged in the auxiliary valve body, the driving input port is connected with the commutator input port through a second internal channel arranged in the main valve body, and the driving input port is used for being connected to a driving air source;

when the pressure of the monitoring input port is larger than the set air pressure, the control air path changes the communication state, and the pneumatic actuator is controlled to cut off the safety valve after the first reversing air path changes the communication state.

2. The integrated safety valve universal pressure switch of claim 1,

also comprises a pressure reducer;

the main valve body is integrally machined, the pressure reducer comprises an end cover, at least part of the pressure reducer is located in the main valve body, and the end cover is fixed to the main valve body; the high-pressure end of the pressure reducer is communicated with the driving input port, and the low-pressure end of the pressure reducer is connected with the second internal channel; one side surface of the auxiliary valve body is attached and fixed to one side surface of the main valve body;

the commander is a normally closed commander, and the monitoring input port is used for being connected to a valve rear pipeline of the safety valve.

3. The integrated safety valve universal pressure switch of claim 1,

the commander still includes shell body, spring and diaphragm, the one end of shell body will the diaphragm is fixed to the main valve body makes the diaphragm both sides constitute spring cavity and monitoring cavity respectively, the spring set up in the spring cavity, the monitoring input port with monitoring cavity intercommunication, the one end of spring apply pressure in the diaphragm, the other end of spring is connected to the regulator, the regulator is used for adjusting the spring is right the pressure of diaphragm, thereby adjust set for atmospheric pressure.

4. The integrated safety valve universal pressure switch of claim 2,

the gas-fired equipment further comprises a one-way valve, the one-way valve is fixed on the main valve body, an inlet of the one-way valve is used for being connected to a gas source of the gas-fired equipment, and an outlet of the one-way valve is communicated with the driving input port.

5. The integrated safety valve universal pressure switch of claim 1,

the manual cut-off valve is provided with a manual operator, a cut-off valve main input port, a cut-off valve auxiliary input port and a cut-off valve output port;

the main input port of the cut-off valve is communicated with the driving output port, the auxiliary input port of the cut-off valve is communicated with the second internal channel, and the output port of the cut-off valve is communicated with the reversing control port;

the manual cut-off valve has a normal state and a manual cut-off state which can be manually switched by the manual operator; in the normal state, the main input port of the cut-off valve is communicated with the output port of the cut-off valve; in the manual cut-off state, the auxiliary input port of the cut-off valve is communicated with the output port of the cut-off valve;

the manual shut-off valve is partially integrated within the secondary valve body, and the manual operator is located outside the secondary valve body.

6. The integrated safety valve universal pressure switch of claim 2,

the device also comprises an optional normally closed remote cut-off electromagnetic valve;

the auxiliary valve body is provided with a first reserved opening connected with the reversing control opening, the main valve body or the auxiliary valve body is provided with a second reserved opening connected with the second internal channel, and two ends of a gas path of the remote cut-off electromagnetic valve are respectively connected to the first reserved opening and the second reserved opening to provide a bypass between the reversing control opening and the second internal channel.

7. The integrated safety valve universal pressure switch of claim 6,

the device also comprises a pressure release valve;

the pressure relief valve is fixedly connected to a third reserved opening in the main valve body or the auxiliary valve body, and the third reserved opening is communicated with the second internal channel; or the pressure relief valve is an optional part and is fixedly connected to the second reserved opening.

8. The integrated safety valve universal pressure switch according to any one of claims 1 to 7,

the pneumatic control reversing valve is also provided with a second output port, and the second output port and the input port of the reverser form a second reversing gas path;

the pneumatic control reversing valve has a starting state and a resetting state, and when the reversing control port is in a high-pressure state, the pneumatic control reversing valve enters the starting state to communicate the first reversing gas path; when the reversing control port is in a low-pressure state, the pneumatic reversing valve enters the reset state to enable the second reversing gas path to be communicated;

the first and second output ports are for connection to a double-acting pneumatic actuator of the safety valve.

9. The integrated safety valve universal pressure switch according to any one of claims 1 to 7,

the device also comprises a pressure gauge and a reset valve;

the reset valve includes a reset operator; the reset valve part is integrated in the auxiliary valve body, the reset operator is positioned outside the auxiliary valve body, and the reset valve is provided with a reset gas path which is controlled by the reset operator and is communicated with the reversing control port and the external space and used for controlling the pneumatic reversing valve to reset;

the pressure gauge is fixed to the sub valve body or the main valve body and is communicated with the second internal passage.

10. A gas-fired appliance, comprising:

the integrated safety valve universal pressure switch of any one of claims 1 to 9;

a safety valve;

and the rear valve pipeline of the safety valve is connected to the monitoring input port, so that the integrated safety valve universal pressure switch controls the safety valve to be opened and closed according to the pressure of the rear valve pipeline.

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