CN210108598U - Pressure alarm - Google Patents
Pressure alarm Download PDFInfo
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- CN210108598U CN210108598U CN201921149695.4U CN201921149695U CN210108598U CN 210108598 U CN210108598 U CN 210108598U CN 201921149695 U CN201921149695 U CN 201921149695U CN 210108598 U CN210108598 U CN 210108598U
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Abstract
The utility model belongs to the technical field of pressure alarm, a pressure alarm is disclosed, include: a housing mountable on a pressure vessel for fire fighting; a pressure cavity communicated with the pressure container is arranged in the shell; a metal grounding plate, a metal part and an insulating pushing part are arranged in the shell; when the gas pressure of the pressure cavity is higher than a set value, the insulating pushing component pushes the metal component to separate the metal component from the metal grounding plate, and when the gas pressure of the pressure cavity is equal to or lower than the set value, the metal component is in contact with the metal grounding plate; when the metal part is in contact with the metal grounding plate, the alarm switch is in a closed state, and the on state of the alarm switch can be output to an alarm lamp to give an alarm so as to remind a worker to overhaul the pressure container.
Description
Technical Field
The utility model belongs to the technical field of pressure alarm, concretely relates to pressure alarm.
Background
The existing pressure container for fire fighting does not have a corresponding measuring and displaying device for gas leakage in the container, only a pressure gauge can be used for detecting, and the method is very inconvenient.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the utility model aims to provide a pressure alarm.
The utility model discloses the technical scheme who adopts does:
a pressure alarm is characterized in that: the method comprises the following steps: a housing mountable on a pressure vessel for fire fighting;
a pressure cavity communicated with the pressure container is arranged in the shell;
a metal grounding plate, a metal part and an insulating pushing part are arranged in the shell;
the gas pressure of the pressure cavity can be transmitted to the insulating pushing component;
when the gas pressure of the pressure cavity is higher than a set value, the insulating pushing component pushes the metal component to separate the metal component from the metal grounding plate, and when the gas pressure of the pressure cavity is equal to or lower than the set value, the metal component is in contact with the metal grounding plate;
the metal part and the metal grounding plate jointly form an alarm switch, when the metal part is in contact with the metal grounding plate, the alarm switch is in a closed state, and when the metal part is separated from the metal grounding plate, the alarm switch is in an open state.
Furthermore, the metal part is an electrode ring, the insulating pushing part is an insulating top ring, and a top column on the insulating top ring penetrates through the metal grounding plate and is connected with the electrode ring in a surface contact mode.
Furthermore, the number of the top pillars is six, and the six top pillars are uniformly distributed on the insulating top ring.
Further, the electrode assembly further comprises a first compression elastic component, and when the gas pressure of the pressure cavity is equal to or lower than a set value, the electrode ring is pressed by the elastic restoring force of the first compression elastic component so that the electrode ring is in contact with the metal grounding plate.
Furthermore, the metal part is an electrode cap, the insulating pushing part is an insulating pushing core, and the insulating pushing core penetrates through the metal grounding plate and is in surface contact connection with the electrode cap.
Further, the electrode cap further comprises a second compression elastic component, when the gas pressure of the pressure cavity is equal to or lower than a set value, the electrode cap is pressed by the elastic restoring force of the second compression elastic component, so that the electrode cap is contacted with the metal grounding plate.
Furthermore, the number of the metal parts is two, the two metal parts are an electrode cap and an electrode ring respectively, the number of the insulating pushing parts is two, the two insulating pushing parts are an insulating pushing core and an insulating pushing ring respectively, the insulating pushing ring is located on the outer side of the insulating pushing core, and the electrode ring is located on the outer side of the electrode cap;
the electrode ring and the metal grounding plate jointly form a first alarm switch, and the electrode cap and the metal grounding plate jointly form a second alarm switch;
when the gas pressure of the pressure cavity is equal to or lower than a first set value, the electrode ring is in contact with the metal grounding plate, and the first alarm switch is in a closed state;
when the gas pressure of the pressure cavity is equal to or lower than a second set value, the electrode cap and the electrode ring are respectively contacted with the metal grounding plate, and the first alarm switch and the second alarm switch are both in a closed state.
Further, the first set value is greater than the second set value.
Further, the insulating top core penetrates through the metal grounding plate to be in surface contact connection with the electrode cap;
the top column on the insulating top ring penetrates through the metal grounding plate to be in surface contact connection with the electrode ring;
the electrode ring is pressed by the elastic restoring force of the first compression elastic part to make the electrode ring contact with the metal grounding plate;
the electrode cap is pressed by the elastic restoring force of the second compression elastic part to make the electrode cap contact with the metal grounding plate.
Further, the alarm device also comprises a circuit board and an alarm lamp, wherein the circuit board is arranged in the shell;
the alarm lamp is arranged on the circuit board;
the circuit board is provided with the power supply input end and the alarm output end;
the power input end is electrically connected with the metal grounding plate through a grounding elastic component, and the metal component is connected with the alarm lamp in series and is electrically connected with the alarm output end.
The utility model has the advantages that:
(1) when the pressure alarm is used, when the gas pressure of the pressure cavity is higher than a set value, the insulating pushing component pushes the metal component and separates the metal component from the metal ground plate, when the gas pressure of the pressure cavity is equal to or lower than the set value (representing that gas leaks from the pressure container), the metal component is in contact with the metal ground plate, the alarm switch is in a closed state at the moment, the alarm switch can be connected with an external power supply and an alarm lamp to form a closed loop, and the conduction state of the alarm switch is output to the alarm lamp to give an alarm so as to remind a worker to overhaul the pressure container.
(2) The utility model discloses a pressure alarm compact structure, overall dimension is little, and the leakproofness is strong, manufacturing process nature is simple, and the batch production of being convenient for, but wide application in trades such as fire control, car, food, agricultural irrigation, air conditioner and chemical industry.
(3) The utility model discloses a pressure alarm can design two setting values, can carry out dual alarm and remind, and the security is higher.
Drawings
FIG. 1 is a schematic structural view of example 1.
FIG. 2 is a schematic structural view of example 2.
FIG. 3 is a schematic structural view of embodiment 3.
Fig. 4 is a schematic structural diagram of the present invention.
Fig. 5 is an exploded view of a portion of the components of the present invention.
Fig. 6 is a schematic structural diagram of the metal ground plate according to the present invention.
Fig. 7 is a schematic structural view of the insulating top ring of the present invention.
Fig. 8 is a schematic structural diagram of the first alarm switch and the second alarm switch of the present invention both in the closed state. (in FIG. 8, the electrode ring and the metal grounding plate are both ring-shaped, FIG. 8 shows a schematic view of the top ring through hole due to the fact that the top pillar on the insulating top ring penetrates through the top ring through hole, FIG. 8 shows a schematic view of the top ring through hole, and actually, the electrode ring and the metal grounding plate are in a surface contact connection state)
Fig. 9 is a schematic structural diagram of the first alarm switch and the second alarm switch of the present invention in an off state.
Fig. 10 is a circuit block diagram of embodiment 3.
In the figure: 10-a housing; 101-external threads; 12-a gland; 11-an insulating membrane; 13-a metallic ground plane; 131-top ring via holes; 132-a top core via; 133-mounting holes; 14-middle ring; 141-a grounding spring; 15-a circuit board; 151-rivets; 16-an end cap; 17-a plug ring; 18-an insulated cable; 191-a first O-ring; 192-a second O-ring seal; 193-third O-ring; 21-an electrode ring; 22-electrode cap; 31-an insulating top ring; 311-top pillar; 32-an insulating top core; 41-high pressure spring; 42-a low pressure spring; 51-a first alarm switch; 52-a second alarm switch; 61-high voltage alarm output; 62-low voltage alarm output end; 71-yellow light emitting diode; 72-red light emitting diode; 73-resistance; 80-power input; 90-ground terminal.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Example 1:
as shown in fig. 1, 4 and 5, the pressure alarm of the present embodiment comprises a housing 10 mountable on a pressure vessel for fire fighting, a power supply and an alarm mechanism; the lower end of the casing 10 is provided with an external thread 101, and the lower end of the casing can be screwed on a pressure vessel for fire fighting through the external thread 101. The shell 10 is internally provided with a pressure cavity communicated with the pressure container, the pressure cavity is equal to the gas pressure of the pressure container, and when the gas of the pressure container leaks, the pressure alarm is used for giving a leakage alarm.
A metal grounding plate 13 (provided with a mounting hole 133), a metal part and an insulating pushing part are arranged in the shell; when assembling, the insulating diaphragm 11, the pressing cover 12, the metal grounding plate 13, the middle ring 14, the circuit board 15 and the end cap 16 are assembled in the housing 10 from bottom to top in sequence. The end cap 16, middle ring and gland 12 are in turn threaded into the housing. Wherein the end cap 16 is fitted to the housing 10 by a second O-ring seal 192 and the gland 12 is fitted to the housing 10 by a third O-ring seal 193. The metal ground plate 13 is fixed between the press cover and the middle ring, and the circuit board 15 is fixed between the middle ring and the end cap. A grounding elastic component is further connected between the circuit board 15 and the metal grounding plate 13, and the grounding elastic component is a grounding spring 141 which is arranged in the middle ring 14 in a penetrating manner.
The pressure chamber is located on the side of the insulating diaphragm 11 away from the gland, and the pressure chamber transmits gas pressure to the insulating pushing component through the insulating diaphragm 11.
The metal part and the metal grounding plate jointly form an alarm switch, when the metal part is in contact with the metal grounding plate, the alarm switch is in a closed state, and when the metal part is separated from the metal grounding plate, the alarm switch is in an open state.
In this embodiment, the metal component is an electrode ring 21, the insulating pushing component is an insulating top ring 31, and the electrode ring and the metal grounding plate jointly form a first alarm switch. When assembling, the electrode ring 21 is contacted with the metal grounding plate 13 by pressing the electrode ring 21 by the first compression elastic component, wherein the first compression elastic component is a high voltage spring 41, and the high voltage spring 41 is positioned between the electrode ring and the circuit board 15.
The high voltage spring 41 is located between the circuit board 15 and the electrode ring 21, and during assembly, the elastic restoring force generated by the compression of the high voltage spring 41 presses the electrode ring to make the electrode ring and the metal grounding plate 13 in surface contact connection (as shown in fig. 1 and 8).
One end of the insulating top ring 31 is in contact connection with the insulating diaphragm 11, a top pillar 311 on the other end penetrates through the metal ground plate 13 (as shown in fig. 6, the metal ground plate 13 is correspondingly provided with a top ring via hole 131, and the insulating top ring 31 can be in surface contact connection with the electrode ring through the top ring via hole 131), and the top pillar is used for pushing the electrode ring under the action of external force. As shown in fig. 7, the number of the top pillars is six, six top pillars are uniformly arranged on the insulating top ring, preferably, the electrode ring, the insulating top ring and the pressure chamber are coaxially arranged, the gas pressure generated by the gas in the pressure chamber can be uniformly transmitted to the insulating top ring and then uniformly transmitted to the electrode ring through the six top pillars, the electrode ring cannot be inclined due to nonuniform stress, so that the inclined electrode ring is in contact with the metal grounding plate 13 to conduct a closed loop, and unnecessary alarm, namely false alarm, is given out.
The high voltage spring 41 is located between the circuit board 15 and the electrode ring 21, and during assembly, the elastic restoring force generated by the compression of the high voltage spring 41 presses the electrode ring to make the electrode ring 21 and the metal grounding plate 13 in surface contact connection (as shown in fig. 1).
After assembly, the pressure alarm is screwed on a pressure vessel for fire fighting, gas in the pressure vessel enters a pressure cavity, the gas pressure of the pressure cavity is transmitted to an insulating pushing component through an insulating membrane 11 (the insulating membrane 11 is thin, so that excessive gas pressure cannot be consumed, but the function of isolating medium in the pressure vessel can be realized, and the phenomenon that the work of the pressure alarm is influenced because the medium enters a cavity between a gland and an end cap is avoided), namely, the gas pressure can be transmitted to an insulating top ring 31, the insulating top ring 31 can generate an upward acting force to resist the elastic restoring force (the direction is downward) of a high-pressure spring 41 to push an electrode ring 21, so that the electrode ring is separated from a metal grounding plate 13 (as shown in fig. 9). The gas pressure of the pressure vessel is sufficiently large and above the set value.
In the present embodiment, a warning lamp is provided on the circuit board; the circuit board is provided with the power supply input end and the alarm output end; the power input end is electrically connected with the metal grounding plate through a grounding elastic component, and the metal component is connected with the alarm lamp in series and is electrically connected with the alarm output end. The external power supply, the alarm lamp and the first alarm switch (the electrode ring and the metal grounding plate jointly form the first alarm switch) are connected into a closed loop by respectively connecting the external power supply with the power supply input end and the alarm output end.
The alarm lamp is specifically a light emitting diode, in order to enable the light emitting diode to work normally, a resistor can be connected in series in the closed loop, and the number of the light emitting diodes is set according to actual needs.
When the gas pressure in the pressure container is reduced to a set value, the upward acting force generated by the insulating top ring 31 is not enough to resist the elastic restoring force of the high-voltage spring 41, the elastic restoring force generated by the compression of the high-voltage spring 41 presses the electrode ring 21 to enable the electrode ring to be in contact with the metal grounding plate 13, the first alarm switch is in a closed state, the closed loop is in a closed state, the light-emitting diode is on, and an alarm is given.
In summary, when the pressure alarm of the present embodiment is used, when the gas pressure of the pressure chamber is higher than the set value, the insulating pushing component pushes the metal component and separates the metal component from the metal grounding plate 13, and when the gas pressure of the pressure chamber is equal to or lower than the set value (indicating that the pressure vessel has gas leakage), the electrode ring contacts the metal grounding plate 13, the first alarm switch is in a closed state, the closed loop is in a closed state, and the light emitting diode is turned on to remind a worker to repair the pressure vessel.
If the initial pressure value of the pressure container is 1.7MPa, the set value (namely the alarm pressure value) is 1.0MPa, the contact area of the insulating top ring 31 and the electrode ring 21 is the pressure area, and the pressure area is 0.745cm2The elastic restoring force of the high-voltage spring 41 is controlled to be 74.5N, so that when the pressure vessel leaks to a pressure value of 1.0MPa, the gas pressure of the pressure cavity is continuously reduced, the upward acting force generated by the insulating top ring 31 cannot resist the elastic restoring force of the high-voltage spring 41, the elastic restoring force generated by the high-voltage spring 41 presses the electrode ring 21 again to enable the electrode ring to be in contact with the metal grounding plate, the first alarm switch is in a closed state, a closed loop is in a closed state, the light emitting diode is on, and an alarm is given.
The power input end and the alarm output end are connected with an external power supply through lead-out wires, the lead-out wires of the power input end and the alarm output end are wrapped by the same insulating cable 18, the insulating cable 18 is assembled on the end cap 16 through a plug ring 17, the plug ring 17 is connected with the end cap 16 in a sealing mode through a first O-shaped sealing ring 191, and the sealing performance of a cavity in the shell is guaranteed.
The grounding spring 141 is used to electrically connect the metal ground plate 13 with the negative terminal on the circuit board 15 so that the power input terminal can be electrically connected with the metal ground plate. The wire that electrode ring and warning output are connected can pass the via hole on the circuit board, guarantees that this wire arranges in order.
The high-voltage spring 41 and the electrode ring are positioned on the inner side of the grounding spring 141, so that the electrode ring is not in contact with the grounding spring 141, and short circuit cannot occur. When the gas pressure of the pressure cavity is higher than the set value, the electrode ring is separated from the metal grounding plate 13 under the action of the gas pressure, and the closed loop is in an open circuit state, so that the open circuit state of the closed loop is not influenced by the contact between the electrode ring and the grounding spring 141.
Example 2:
as shown in fig. 2, 4 and 5, the pressure alarm of the present embodiment comprises a housing 10 mountable on a pressure vessel for fire fighting, a power supply and an alarm mechanism; the lower end of the casing 10 is provided with an external thread 101, and the lower end of the casing can be screwed on a pressure vessel for fire fighting through the external thread 101. The shell 10 is internally provided with a pressure cavity communicated with the pressure container, the pressure cavity is equal to the gas pressure of the pressure container, and when the gas of the pressure container leaks, the pressure alarm is used for giving a leakage alarm.
A metal grounding plate 13 (provided with a mounting hole 133), a metal part and an insulating pushing part are arranged in the shell; when assembling, the insulating diaphragm 11, the pressing cover 12, the metal grounding plate 13, the middle ring 14, the circuit board 15 and the end cap 16 are assembled in the housing 10 from bottom to top in sequence. The end cap 16, middle ring and gland 12 are in turn threaded into the housing. Wherein the end cap 16 is fitted to the housing 10 by a second O-ring seal 192 and the gland 12 is fitted to the housing 10 by a third O-ring seal 193. The metal ground plate 13 is fixed between the press cover and the middle ring, and the circuit board 15 is fixed between the middle ring and the end cap. A grounding elastic component is further connected between the circuit board 15 and the metal grounding plate 13, and the grounding elastic component is a grounding spring 141 which is arranged in the middle ring 14 in a penetrating manner.
The pressure chamber is located on the side of the insulating diaphragm 11 away from the gland, and the pressure chamber transmits gas pressure to the insulating pushing component through the insulating diaphragm 11.
The metal part and the metal grounding plate jointly form an alarm switch, when the metal part is in contact with the metal grounding plate, the alarm switch is in a closed state, and when the metal part is separated from the metal grounding plate, the alarm switch is in an open state.
In this embodiment, the metal component is an electrode cap 22, the insulating pushing component is an insulating pushing core 32, and the electrode cap and the metal ground plate jointly form a second alarm switch; when the electrode cap 22 is assembled, the electrode cap 22 is pressed by a second compression elastic component to make the electrode cap 22 contact with the metal grounding plate 13, wherein the second compression elastic component is a low-voltage spring 42, and the low-voltage spring 42 is positioned between the electrode cap 22 and the circuit board 15. The low-pressure spring 42 is positioned by a rivet 151, the rivet 151 penetrates the circuit board 15 and is fixed to the circuit board, and the outer circle of the nose of the rivet contacts the inner circle of the low-pressure spring 42 to position the low-pressure spring 42.
One end of the insulating top core 32 is in contact connection with the insulating membrane 11, and the other end of the insulating top core passes through the metal ground plate 13 (as shown in fig. 6, the metal ground plate 13 is correspondingly provided with a top core through hole 132, and the insulating top core 32 can pass through the top core through hole 132) to be in surface contact connection with the electrode cap 22, and the insulating top core is used for pushing the electrode cap 22 under the action of external force. Preferably, the electrode cap 22, the insulating top core and the pressure cavity are coaxially arranged, and the gas pressure generated by the gas in the pressure cavity can be uniformly transmitted to the insulating top core and then to the electrode cap 22, so that the occurrence of false alarm is avoided.
The low voltage spring 42 is located between the circuit board 15 and the electrode cap 22, and during assembly, the elastic restoring force generated by the compression of the low voltage spring 42 presses the electrode cap to make the electrode cap in surface contact connection with the metal grounding plate 13 (as shown in fig. 2).
After assembly, the pressure alarm is screwed on a pressure vessel for fire fighting, gas in the pressure vessel enters a pressure cavity, the gas pressure of the pressure cavity is transmitted to an insulating pushing component through an insulating membrane 11 (the insulating membrane 11 is thin, so that excessive gas pressure cannot be consumed, but the effect of isolating medium in the pressure vessel can be achieved, and the phenomenon that the medium enters a cavity between a gland and an end cap to influence the work of the pressure alarm is avoided), namely the gas pressure can be transmitted to an insulating pushing core 32, and the insulating pushing core can generate an upward acting force to resist the elastic restoring force (the direction is downward) of a low-pressure spring 42 to push an electrode cap, so that the electrode cap is separated from a metal grounding plate 13 (as shown in fig. 9). The gas pressure of the pressure vessel is sufficiently large and above the set value.
In the present embodiment, a warning lamp is provided on the circuit board; the circuit board is provided with the power supply input end and the alarm output end; the power input end is electrically connected with the metal grounding plate through a grounding elastic component, and the metal component is connected with the alarm lamp in series and is electrically connected with the alarm output end. The external power supply, the alarm lamp and the second alarm switch (the electrode cap and the metal grounding plate jointly form the second alarm switch) are connected into a closed loop by respectively connecting the external power supply with the power supply input end and the alarm output end.
The alarm lamp is specifically a light emitting diode, in order to enable the light emitting diode to work normally, a resistor can be connected in series in the closed loop, and the number of the light emitting diodes is set according to actual needs.
When the gas pressure in the pressure container is reduced to a set value, the upward acting force generated by the insulating top core 32 is not enough to resist the elastic restoring force of the low-voltage spring 42, the elastic restoring force generated by the second compression elastic component presses the electrode cap 22 again to make the electrode cap contact with the metal grounding plate 13, the second alarm switch is in a closed state, the closed loop is in a closed state, and the light-emitting diode is on to send out an alarm signal.
In summary, when the pressure alarm of the present embodiment is used, when the gas pressure of the pressure chamber is higher than the set value, the insulating pushing component pushes the metal component and separates the metal component from the metal grounding plate 13, and when the gas pressure of the pressure chamber is equal to or lower than the set value (indicating that the pressure vessel has gas leakage), the metal component contacts the metal grounding plate 13, the second alarm switch is in a closed state, the closed loop is in a closed state, and the light emitting diode is turned on, so as to remind the operator to overhaul the pressure vessel.
If the initial pressure value of the pressure container is 1.7MPa, the set value (namely the alarm pressure value) is 0.4MPa, the contact area of the insulating top core 32 and the electrode cap 22 is the pressure area, and the pressure area is 0.385cm2The elastic restoring force of the low-pressure spring 42 is controlled to be 15.4N, so that when the pressure vessel leaks to a pressure value of 0.4MPa, the gas pressure of the pressure cavity is continuously reduced, the upward acting force generated by the insulating top core 32 is insufficient to resist the elastic restoring force of the low-pressure spring 42, the elastic restoring force generated by the compression of the low-pressure spring 42 presses the electrode cap 22 again to enable the electrode cap 22 to be in contact with the metal grounding plate 13, the second alarm switch is in a closed state, a closed loop is in a closed circuit state, the light-emitting diode is on, and an alarm is given.
The power input end and the alarm output end are connected with an external power supply through lead-out wires, the lead-out wires of the power input end and the alarm output end are wrapped by the same insulating cable 18, the insulating cable 18 is assembled on the end cap 16 through a plug ring 17, the plug ring 17 is connected with the end cap 16 in a sealing mode through a first O-shaped sealing ring 191, and the sealing performance of a cavity in the shell is guaranteed.
The grounding spring 141 is used to electrically connect the metal ground plate 13 with the negative terminal on the circuit board 15 so that the power input terminal can be electrically connected with the metal ground plate. The wire that electrode cap and warning output are connected can pass the via hole on the circuit board, guarantees that this wire arranges in order.
The low-voltage spring 42 and the electrode cap are located on the inner side of the grounding spring 141, so that the electrode cap is not in contact with the grounding spring 141, and a short circuit situation cannot occur. When the gas pressure of the pressure cavity is higher than the set value, the electrode cap is separated from the metal grounding plate 13 under the action of the gas pressure, and the closed circuit is in an open circuit state, so that the open circuit state of the closed circuit is not influenced by the contact between the electrode cap and the grounding spring 141.
Example 3:
as shown in fig. 3, 4 and 5, the pressure alarm of the present embodiment comprises a housing 10 mountable on a pressure vessel for fire fighting, a power supply and an alarm mechanism; the lower end of the casing 10 is provided with an external thread 101, and the lower end of the casing 10 can be screwed on a pressure vessel for fire fighting through the external thread 101. The shell 10 is internally provided with a pressure cavity communicated with the pressure container, the pressure cavity is equal to the gas pressure of the pressure container, and when the gas of the pressure container leaks, the pressure alarm is used for giving a leakage alarm.
A metal grounding plate 13 (provided with a mounting hole 133), a metal part and an insulating pushing part are arranged in the shell; when assembling, the insulating diaphragm 11, the pressing cover 12, the metal grounding plate 13, the middle ring 14, the circuit board 15 and the end cap 16 are assembled in the housing 10 from bottom to top in sequence. The end cap 16, middle ring and gland 12 are in turn threaded into the housing. Wherein the end cap 16 is fitted to the housing 10 by a second O-ring seal 192 and the gland 12 is fitted to the housing 10 by a third O-ring seal 193. The metal ground plate 13 is fixed between the press cover and the middle ring, and the circuit board 15 is fixed between the middle ring and the end cap. A grounding elastic component is further connected between the circuit board 15 and the metal grounding plate 13, and the grounding elastic component is a grounding spring 141 which is arranged in the middle ring 14 in a penetrating manner.
The pressure chamber is located on the side of the insulating diaphragm 11 away from the gland, and the pressure chamber transmits gas pressure to the insulating pushing component through the insulating diaphragm 11.
The metal part and the metal grounding plate jointly form an alarm switch, when the metal part is in contact with the metal grounding plate, the alarm switch is in a closed state, and when the metal part is separated from the metal grounding plate, the alarm switch is in an open state.
In this embodiment, the number of the metal parts is two, the two metal parts are the electrode cap 22 and the electrode ring 21 respectively, the number of the insulating pushing parts is also two, the two insulating pushing parts are the insulating pushing core 32 and the insulating pushing ring 31 respectively, the insulating pushing ring 31 is located on the outer side of the insulating pushing core 32, and the electrode ring 21 is located on the outer side of the electrode cap 22; the electrode ring 21 and the metal grounding plate together form a first alarm switch 51, and the electrode cap 22 and the metal grounding plate 13 together form a second alarm switch 52. When the electrode cap is assembled, the electrode cap 22 is pressed by the second compression elastic component to make the electrode cap contact with the metal grounding plate 13, wherein the second compression elastic component is a low-voltage spring 42, the low-voltage spring 42 is located between the electrode cap and the circuit board 15, and the elastic restoring force generated by the compression of the low-voltage spring 42 presses the electrode cap to make the electrode cap contact with the metal grounding plate 13 (as shown in fig. 3). The low-pressure spring 42 is positioned by a rivet 151, the rivet 151 penetrates the circuit board 15 and is fixed to the circuit board, and the outer circle of the nose of the rivet contacts the inner circle of the low-pressure spring 42 to position the low-pressure spring 42.
The electrode ring 21 is pressed by a first compression elastic component, so that the electrode ring 21 is in contact with the metal grounding plate 13, wherein the first compression elastic component is a high-voltage spring 41, the high-voltage spring 41 is positioned between the electrode ring 21 and the circuit board, and the elastic restoring force generated by the compression of the high-voltage spring 41 presses the electrode ring 21, so that the electrode ring 21 is in surface contact connection with the metal grounding plate 13 (as shown in fig. 3 and 8).
One end of the insulating top ring 31 is in contact connection with the insulating membrane 11, a top pillar on the other end penetrates through the metal grounding plate to be in surface contact connection with the electrode ring 21, and the top pillar is used for pushing the electrode ring 21 under the action of external force. The quantity of fore-set is six, and six fore-sets evenly lay on the insulating apical ring, make best electrode ring, insulating apical ring 31 and the coaxial setting of pressure chamber, the gaseous gas pressure that produces in the pressure chamber can evenly transmit for insulating apical ring 31, then evenly transmits for the electrode ring through six fore-sets, can not lead to the electrode ring slope because of the atress is inhomogeneous to the electrode ring that leads to the slope contacts with the metal ground plate and switches on closed circuit, and sends unnecessary alarm and mistake newspaper promptly.
After assembly, the pressure alarm is screwed on a pressure vessel for fire fighting, gas in the pressure vessel enters a pressure cavity, the gas pressure of the pressure cavity is transmitted to an insulating top through an insulating membrane 11, namely the gas pressure can be transmitted to an insulating top ring 31, the insulating top ring 31 can generate an upward acting force to resist the elastic restoring force (downward direction) of a high-voltage spring 41 to push an electrode ring, and therefore the electrode ring is separated from a metal grounding plate. The gas pressure of the pressure vessel is sufficiently large and higher than a first set value, which is larger than a second set value.
In the present embodiment, a warning lamp is provided on the circuit board; the circuit board is provided with the power supply input end and the alarm output end; the power input end is electrically connected with the metal grounding plate through a grounding elastic component, and the metal component is connected with the alarm lamp in series and is electrically connected with the alarm output end. The number of the alarm lamps is two corresponding to the number of the metal parts and the insulating push-up parts, one of the alarm lamps is a yellow light emitting diode 71, and the other alarm lamp is a red light emitting diode 72, so that double alarm can be performed.
The external power supply is respectively connected with the power supply input end 80 and the alarm output ends, the number of the alarm output ends is two, for the purpose of distinguishing, the two alarm output ends are respectively a high-voltage alarm output end 61 and a low-voltage alarm output end 62, so that the external power supply, the yellow light-emitting diode 71 and the first alarm switch 51 (because the electrode ring and the metal grounding plate jointly form the first alarm switch) are connected into a first closed loop, and the external power supply, the red light-emitting diode 72 and the second alarm switch 52 (because the electrode cap and the metal grounding plate jointly form the second alarm switch) are connected into a second closed loop (as shown in fig. 10, a grounding end 90 is also arranged in fig. 10).
In order to make the yellow (or red) led work normally, the yellow (or red) led may be connected in series with a resistor 73, and the number of the yellow (or red) leds may be set according to actual needs.
When the gas pressure in the pressure container is reduced to a first set value, the upward acting force generated by the insulating top ring 31 is not enough to resist the elastic restoring force of the high-voltage spring 41, the elastic restoring force generated by the compression of the high-voltage spring 41 presses the electrode ring to enable the electrode ring to be in contact with the metal grounding plate, the first alarm switch is in a closed state, the first closed loop is in a closed state, and the yellow light-emitting diode is on to indicate a primary leakage alarm.
One end of the insulating top core 32 is in contact connection with the insulating membrane, the other end of the insulating top core penetrates through the metal grounding plate to be in surface contact connection with the electrode cap, and the insulating top core is used for pushing the electrode cap under the action of external force. Preferably, the electrode cap, the insulating top core and the pressure cavity are coaxially arranged, gas pressure generated by gas in the pressure cavity can be uniformly transmitted to the insulating top core and then to the electrode cap, and false alarm is avoided.
After assembly, the pressure alarm is screwed on a pressure container for fire fighting, gas in the pressure container enters a pressure cavity, the gas pressure of the pressure cavity is transmitted to a metal part through an insulating membrane 11 (the insulating membrane is thin, cannot consume excessive gas pressure, but can play a role of isolating a medium in the pressure container), namely, the gas pressure can be transmitted to an insulating top core 32, the insulating top core can generate an upward acting force to resist the elastic restoring force (in a downward direction) of a low-voltage spring 42 to push an electrode cap 22, and therefore the electrode cap is separated from a metal grounding plate. The gas pressure of the pressure vessel is sufficiently large and above the second set point.
When the gas pressure in the pressure container is reduced to a second set value, the upward acting force generated by the insulating top core 32 is not enough to resist the elastic restoring force of the low-pressure spring 42, the elastic restoring force generated by the compression of the low-pressure spring 42 presses the electrode cap 22 again to enable the electrode cap 22 to be in contact with the metal grounding plate, the second alarm switch is in a closed state, a second closed loop is in a closed state, and the red light-emitting diode lamp is on to give a more serious alarm of leakage.
In summary, when the pressure alarm of the present embodiment is used, when the gas pressure of the pressure chamber is higher than the first set value, the insulating top ring 31 pushes the electrode ring and separates the electrode ring 21 from the metal grounding plate 13, and when the gas pressure of the pressure chamber is equal to or lower than the first set value (indicating that the pressure vessel has gas leakage), the electrode ring 21 contacts the metal grounding plate 13, the first closed loop is in a closed state, the yellow light emitting diode is on, and indicates a primary leakage alarm, so as to remind the operator to overhaul the pressure vessel; when the gas pressure of the pressure cavity is higher than a second set value, the insulating top core 32 pushes the electrode cap 22 and separates the electrode cap 22 from the metal grounding plate 13, when the gas pressure of the pressure cavity is equal to or lower than the second set value (representing that the gas leakage of the pressure container is serious), the electrode cap 22 is in contact with the metal grounding plate 13, the second closed loop is in a closed state, the red light emitting diode is on, a warning that the leakage is more serious is given, and a worker is reminded that the pressure container must be overhauled.
If the initial pressure value of the pressure container is 1.7MPa, the first set value is larger than the second set value, the first set value (namely the primary alarm pressure value) is 1.0MPa, and the second set value (namely the serious leakage alarm pressure value) is 0.4 MPa. The contact area between the insulating top ring 31 and the electrode ring 21 is the pressure area, and the pressure area is 0.745cm2When the pressure vessel leaks to a pressure value of 1.0MPa, the gas pressure of the pressure chamber continuously drops, the upward acting force generated by the insulating top ring 31 is insufficient to resist the elastic restoring force of the high-voltage spring 41, the elastic restoring force generated by the compression of the high-voltage spring 41 presses the electrode ring 21 again to make the electrode ring 21 contact with the metal grounding plate 13, the first closed loop is in a closed state, and the yellow light-emitting diode is on; the pressure container is continuously leaked, and the yellow light-emitting diode is continuously lightened; the contact area between the insulating top core 32 and the electrode cap is the pressure area, and the pressure area is 0.385cm2The elastic restoring force of the low-pressure spring 42 is controlled to be 15.4N, when the pressure vessel leaks to a pressure value of 0.4MPa, the gas pressure of the pressure cavity is continuously reduced, the upward acting force generated by the insulating top core is insufficient to resist the elastic restoring force of the low-pressure spring 42, the elastic restoring force generated by the compression of the low-pressure spring 42 presses the electrode cap again to enable the electrode cap to be in contact with the metal grounding plate 13, the second closed loop is in a closed state, the red light-emitting diode is on, and the red light-emitting diode and the yellow light-emitting diode are simultaneously on at the same time, so that the operator is prompted to haveAnd (5) overhauling the container.
The pressure alarm of this embodiment has designed two setting values, can carry out dual alarm and remind, and the security is higher.
The power input end and the alarm output end are connected with an external power supply through lead-out wires, the lead-out wires of the power input end and the alarm output end are wrapped by the same insulating cable 18, the insulating cable 18 is assembled on the end cap 16 through a plug ring 17, the plug ring 17 is connected with the end cap 16 in a sealing mode through a first O-shaped sealing ring 191, and the sealing performance of a cavity in the shell is guaranteed.
The grounding spring 141 is used to electrically connect the metal ground plate 13 with the negative terminal on the circuit board 15 so that the power input terminal can be electrically connected with the metal ground plate. The wire that electrode cap and warning output are connected can pass the via hole on the circuit board, guarantees that this wire arranges in order.
In a word, the utility model discloses a pressure alarm compact structure, overall dimension is little, and the leakproofness is strong, manufacturing process nature is simple, the batch production of being convenient for, but wide application in trades such as fire control, car, food, agricultural irrigation, air conditioner and chemical industry.
The utility model discloses an alarm lamp can be replaced by warning siren or voice alarm etc. as long as can conveniently indicate the staff to overhaul pressure vessel.
The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.
Claims (10)
1. A pressure alarm is characterized in that: the method comprises the following steps: a housing mountable on a pressure vessel for fire fighting;
a pressure cavity communicated with the pressure container is arranged in the shell;
a metal grounding plate, a metal part and an insulating pushing part are arranged in the shell;
the gas pressure of the pressure cavity can be transmitted to the insulating pushing component;
when the gas pressure of the pressure cavity is higher than a set value, the insulating pushing component pushes the metal component to separate the metal component from the metal grounding plate, and when the gas pressure of the pressure cavity is equal to or lower than the set value, the metal component is in contact with the metal grounding plate;
the metal part and the metal grounding plate jointly form an alarm switch, when the metal part is in contact with the metal grounding plate, the alarm switch is in a closed state, and when the metal part is separated from the metal grounding plate, the alarm switch is in an open state.
2. A pressure alarm according to claim 1 wherein: the metal part is an electrode ring, the insulating pushing part is an insulating top ring, and a top column on the insulating top ring penetrates through the metal grounding plate to be in surface contact connection with the electrode ring.
3. A pressure alarm according to claim 2 wherein: the number of the top pillars is six, and the six top pillars are uniformly distributed on the insulating top ring.
4. A pressure alarm according to claim 3 wherein: the electrode ring is pressed by the elastic restoring force of the first compression elastic component so that the electrode ring is contacted with the metal grounding plate when the gas pressure of the pressure cavity is equal to or lower than a set value.
5. A pressure alarm according to claim 1 wherein: the metal part is an electrode cap, the insulating pushing part is an insulating pushing core, and the insulating pushing core penetrates through the metal grounding plate and is in surface contact connection with the electrode cap.
6. A pressure alarm according to claim 5 wherein: and the electrode cap is pressed by the elastic restoring force of the second compression elastic component to be in contact with the metal grounding plate when the gas pressure of the pressure cavity is equal to or lower than a set value.
7. A pressure alarm according to claim 1 wherein: the number of the metal parts is two, the two metal parts are respectively an electrode cap and an electrode ring, the number of the insulating pushing parts is two, the two insulating pushing parts are respectively an insulating pushing core and an insulating pushing ring, the insulating pushing ring is positioned on the outer side of the insulating pushing core, and the electrode ring is positioned on the outer side of the electrode cap;
the electrode ring and the metal grounding plate jointly form a first alarm switch, and the electrode cap and the metal grounding plate jointly form a second alarm switch;
when the gas pressure of the pressure cavity is equal to or lower than a first set value, the electrode ring is in contact with the metal grounding plate, and the first alarm switch is in a closed state;
when the gas pressure of the pressure cavity is equal to or lower than a second set value, the electrode cap and the electrode ring are respectively contacted with the metal grounding plate, and the first alarm switch and the second alarm switch are both in a closed state.
8. A pressure alarm according to claim 7 wherein: the first set value is greater than the second set value.
9. A pressure alarm according to claim 8 wherein: the device also comprises a first compression elastic component and a second compression elastic component;
the insulating top core penetrates through the metal grounding plate and is in surface contact connection with the electrode cap;
the top column on the insulating top ring penetrates through the metal grounding plate to be in surface contact connection with the electrode ring;
the electrode ring is pressed by the elastic restoring force of the first compression elastic part to make the electrode ring contact with the metal grounding plate;
the electrode cap is pressed by the elastic restoring force of the second compression elastic part to make the electrode cap contact with the metal grounding plate.
10. A pressure alarm according to any one of claims 1 to 9 wherein: the alarm lamp also comprises a circuit board and an alarm lamp, wherein the circuit board is arranged in the shell;
the alarm lamp is arranged on the circuit board;
the circuit board is provided with a power supply input end and an alarm output end;
the power input end is electrically connected with the metal grounding plate through a grounding elastic component, and the metal component is connected with the alarm lamp in series and is electrically connected with the alarm output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921149695.4U CN210108598U (en) | 2019-07-22 | 2019-07-22 | Pressure alarm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921149695.4U CN210108598U (en) | 2019-07-22 | 2019-07-22 | Pressure alarm |
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| CN210108598U true CN210108598U (en) | 2020-02-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251616A (en) * | 2021-12-27 | 2022-03-29 | 北京印刷学院 | Stage follow spot lamp device with focus self-tracking function and using method thereof |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251616A (en) * | 2021-12-27 | 2022-03-29 | 北京印刷学院 | Stage follow spot lamp device with focus self-tracking function and using method thereof |
| CN114251616B (en) * | 2021-12-27 | 2023-11-24 | 北京印刷学院 | Stage light-following lamp device with self-tracking focus and use method thereof |
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