CN216200906U - Spring type safety valve - Google Patents
Spring type safety valve Download PDFInfo
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- CN216200906U CN216200906U CN202122534991.XU CN202122534991U CN216200906U CN 216200906 U CN216200906 U CN 216200906U CN 202122534991 U CN202122534991 U CN 202122534991U CN 216200906 U CN216200906 U CN 216200906U
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- position sensor
- spring
- safety valve
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Abstract
The utility model discloses a spring type safety valve, and relates to the technical field of safety valve equipment. The upper end of the valve rod of the utility model penetrates through the adjusting screw of the spring adjusting component; a valve cap is assembled at the top end of the upper cover in a sealing manner, a position sensor is assembled at the top of the valve cap in a sealing manner, and the position sensor and the valve rod are coaxially installed; the top end of the bonnet is also provided with a protective cover, a sealing joint is arranged on the protective cover, and a signal wire of the position sensor penetrates through the sealing joint to extend to the outside. When the safety valve jumps, the adjusting screw on the mounting valve rod approaches the position sensor above, and the position sensor sends out a pulse signal which is transmitted to the central control alarm through a signal wire; or the alarm is transmitted to a remote control room wirelessly through an IC card in an unattended station to alarm. According to the spring type safety valve, the position sensor is in a sealed environment, is not easily influenced by the external environment, can effectively prevent false alarm, and is sensitive in response; and simultaneously prevents medium gas from leaking.
Description
Technical Field
The utility model relates to the technical field of safety valve equipment, in particular to a spring type safety valve.
Background
The spring type safety valve is characterized in that a valve or a plunger and other sealing elements of the valve are locked by means of elastic pressure of a spring, once high pressure generated after the pressure of a pressure container is abnormal overcomes the spring pressure of the safety valve, a locking device is pushed open, a pressure relief channel is formed, and the high pressure is released. The valve clack is divided into a fully-opened type and a slightly-opened type according to different opening heights of the valve clack. The full-lift type has large discharge amount and good resilience, is suitable for liquid and gas media, and the micro-lift type is only suitable for liquid media.
Based on the working principle of the spring type safety valve, a worker cannot monitor the opening and closing states of the safety valve at a far end in real time, and wrong judgment and operation are possibly caused, so that the safety of equipment is influenced.
26/3/2021, the national Bureau discloses a utility model patent with publication number CN212804517U, named as "a spring safety valve state monitoring device", which comprises a protection box, a microswitch, a trigger connecting rod and a remote control system, wherein the protection box is arranged on one side of the spring safety valve; the microswitch is positioned in the protection box; one end of the trigger connecting rod is fixed on the lower spring seat, and the other end of the trigger connecting rod acts on the driving rod of the micro switch and is used for triggering the micro switch to generate an on-off electric signal; the remote control system is electrically connected with the micro switch to form an electric loop, and the opening and closing state of the spring type safety valve is monitored through the on-off signal of the micro switch. When the pressure of an inlet medium of the spring type safety valve exceeds a fixed value, the valve clack is opened to release pressure, the valve rod is jacked up, the valve rod drives the lower spring seat to move upwards, the trigger connecting rod arranged on the lower spring seat acts on the micro switch to generate an on-off electric signal, and the remote control system monitors the state of the spring type safety valve in real time by monitoring the on-off signal of the micro switch.
In the prior art, the trigger connecting rod senses the displacement of the lower spring seat so as to trigger the driving rod of the microswitch, and in such a way, the trigger connecting rod and the lower spring seat are both exposed in an external environment, so that on one hand, the trigger connecting rod is greatly influenced by the external environment (if a bird stands on the trigger connecting rod, the bird also can trigger), false triggering can be caused, and false alarm can be caused; on the other hand, when the spring type safety valve discharges or the outlet has back pressure, a small part of medium gas enters the inner cavity of the upper cover through a gap between the recoil disc and the guide sleeve, and the medium gas can be leaked due to the fact that the spring seat is exposed outside in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that a spring type safety valve state monitoring device in the prior art is easy to report by mistake and leakage of medium gas is easy to find out. When the safety valve jumps, the adjusting screw on the mounting valve rod approaches the position sensor above, and the position sensor sends out a pulse signal which is transmitted to the central control alarm through a signal wire; or the alarm is transmitted to a remote control room wirelessly through an IC card in an unattended station to alarm. According to the spring type safety valve, the position sensor is in a sealed environment, is not easily influenced by the external environment, can effectively prevent false alarm, and is sensitive in response; and simultaneously prevents medium gas from leaking.
In order to solve the problems in the prior art, the utility model is realized by the following technical scheme:
the spring type safety valve comprises a valve body, a valve seat, a valve clack, an upper cover, a valve rod, a guide sleeve, an adjusting spring assembly and a recoil disc, wherein the valve body is provided with an air inlet and a discharge port, and an opening at the upper end of the valve body is hermetically connected with the upper cover; an air inlet joint is arranged at the air inlet, and a valve seat is assembled at the end part of the air inlet joint extending into the valve body; the guide sleeve is assembled in the valve body by the upper cover in a pressing fit mode, the recoil disc is assembled in the guide sleeve in a sliding mode, the valve clack is assembled at the bottom of the recoil disc, and the valve clack is in sealing fit with the valve seat; the lower end of the valve rod penetrates through the upper cover and the adjusting spring assembly to be connected with the upper end of the recoil disc; the upper end of the valve rod penetrates through an adjusting screw rod of the spring adjusting assembly; a valve cap is assembled at the top end of the upper cover in a sealing mode, a position sensor is assembled at the top of the valve cap in a sealing mode, the position sensor penetrates through the top of the valve cap to be installed, a part of the position sensor is located in the valve cap, a part of the position sensor is located outside the valve cap, and the position sensor and the valve rod are installed coaxially; the top end of the bonnet is also provided with a protective cover, a sealing joint is arranged on the protective cover, and a signal wire of the position sensor penetrates through the sealing joint to extend to the outside.
And a wireless transmitting module is further arranged outside the valve body, and a signal wire of the position sensor is connected with the wireless transmitting module.
The position sensor is a direct current two-wire normally open type explosion-proof electromagnetic proximity switch. The load voltage VL = VS-5V of the dc two-wire proximity switch in the ON state, and if the voltage VL is lower than the operating voltage of the load, the load cannot act. In the OFF state, a static current still flows through the load, resulting in a residual voltage of the load. Therefore, the working current and voltage of the load must be determined first to ensure the normal operation of the circuit. When the load current is lower than 5mA, please terminate the bleeder resistor at both ends of the load, and the residual voltage is lower than the reset voltage of the load by the current above 5 mA. Even when the proximity switch is turned OFF, the load has a residual voltage due to leakage current, and therefore, even if the load current is greater than 5mA, the reset voltage of the load needs to be confirmed before use. In particular, DC relays and DC counters are used as loads via the rectifier circuit.
And the top of the valve rod is provided with an adjusting screw which is prepared from a magnetic material.
The valve cap is made of magnetic materials.
O-shaped rings are additionally arranged at the joint of the bonnet and the upper cover and the joint of the passport and the bonnet.
And O-shaped rings are arranged inside and outside the sealing joint.
The adjusting spring assembly comprises a lower spring seat, an adjusting spring, an upper spring seat and an adjusting screw rod, the adjusting spring is arranged between the lower spring seat and the upper spring seat, and the lower spring seat is matched with the valve rod through a limiting step on the valve rod; the upper spring seat is in contact connection with the adjusting screw rod, and the adjusting screw rod is in threaded connection with the top end of the upper cover.
Compared with the prior art, the beneficial technical effects brought by the utility model are as follows:
1. the utility model is that a position sensor is installed above the valve rod, the proximity switch is fixed on the valve cap, and a protective cover is installed on the valve cap in a sealing way to prevent medium gas from leaking. When the safety valve jumps, the adjusting screw on the mounting valve rod approaches the position sensor above, and the position sensor sends out a pulse signal which is transmitted to the central control alarm through a signal wire; or the alarm is transmitted to a remote control room wirelessly through an IC card in an unattended station to alarm. According to the spring type safety valve, the position sensor is in a sealed environment, is not easily influenced by the external environment, can effectively prevent false alarm, and is sensitive in response; and simultaneously prevents medium gas from leaking.
2. The upper cover is connected with the valve body in a sealing way, the bonnet is connected with the upper cover in a sealing way, the shield is connected with the bonnet in a sealing way, and the seal joint is arranged on the shield to connect a signal wire, so that the position sensor is positioned in a closed cavity, and even if the spring type safety valve is discharged or the outlet has back pressure, a small part of medium gas enters the inner cavity of the upper cover through a gap between the recoil disc and the guide sleeve, the leakage of the medium gas can not be caused.
3. The wireless transmitting module is arranged outside the valve body, and the wireless transmitting module wirelessly transmits the alarm to a remote control room in an unattended station to give an alarm.
4. O-shaped rings are additionally arranged at the connection part of the valve cap and the upper cover and the connection part of the protective cover and the valve cap, a sealing joint is additionally arranged at the leading-out opening of the protective cover proximity switch signal wire, and the O-shaped rings are arranged inside and outside the sealing joint, so that the leakage of gas media on the outer surface of the signal wire and the external thread of the sealing joint is prevented.
Drawings
Fig. 1 is an overall sectional structural view of the present invention.
Reference numerals: 1. the valve comprises a valve body, 2, a valve seat, 3, a valve clack, 4, an upper cover, 5, a valve rod, 6, a guide sleeve, 7, an adjusting spring, 8, a recoil disc, 9, an air inlet, 10, a discharge port, 11, an air inlet joint, 12, an adjusting screw rod, 13, a valve cap, 14, a position sensor, 15, a shield, 16, a sealing joint, 17, a signal wire, 18, an adjusting screw, 19, a lower spring seat, 20 and an upper spring seat.
Detailed Description
The technical solution of the present invention is further described in detail with reference to the drawings and the specific embodiments. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As an implementation mode of the embodiment, as shown in fig. 1, a spring-type safety valve is disclosed, which includes a valve body 1, a valve seat 2, a valve flap 3, an upper cover 4, a valve rod 5, a guide sleeve 6, an adjusting spring assembly and a recoil disc 8, wherein the valve body 1 is provided with an air inlet 9 and a discharge port 10, and an opening at the upper end of the valve body 1 is hermetically connected with the upper cover 4; an air inlet joint 11 is arranged at the air inlet 9, and the valve seat 2 is assembled at the end part of the air inlet joint 11 extending into the valve body 1; the guide sleeve 6 is assembled in the valve body 1 by the upper cover 4 in a pressing way, the recoil disc 8 is assembled in the guide sleeve 6 in a sliding way, the valve clack 3 is assembled at the bottom of the recoil disc 8, and the valve clack 3 is in sealing fit with the valve seat 2; the lower end of the valve rod 5 passes through the upper cover 4 and the adjusting spring assembly to be connected with the upper end of the recoil disc 8; the upper end of the valve rod 5 penetrates through an adjusting screw 12 of the spring adjusting assembly; a valve cap 13 is hermetically assembled at the top end of the upper cover 4, a position sensor 14 is hermetically assembled at the top of the valve cap 13, the position sensor 14 is installed through the top of the valve cap 13, a part of the position sensor 14 is positioned in the valve cap 13, a part of the position sensor 14 is positioned outside the valve cap 13, and the position sensor 14 is coaxially installed with the valve rod 5; a protective cap 15 is further mounted on the top end of the bonnet 13, a sealing joint 16 is provided on the protective cap 15, and a signal line 17 of the position sensor 14 extends to the outside through the sealing joint 16.
When the safety valve is opened, the pressure of the air inlet 9 rises, the valve clack 3 is instantaneously and upwards protruded through the valve seat 2, the recoil disc 8 and the valve rod 5 also move upwards for a certain distance under the action of the pressure, and a position sensor 14 is arranged above the valve rod 5 by utilizing the characteristic. When the safety valve jumps, an adjusting screw 18 arranged on the valve rod 5 approaches the position sensor 14 above, and the position sensor 14 sends out a pulse signal which is transmitted to a central control room through a signal wire 17 to alarm; or the alarm is transmitted to a remote control room in an unattended station by an IC card in a wireless mode.
When the spring type safety valve is discharged or back pressure exists at an outlet, a small part of medium gas enters an inner cavity of the upper cover 4 through a gap between the recoil disc 8 and the guide sleeve 6, enters an inner cavity of the bonnet 13 through a thread gap of the adjusting screw 12 and enters the inner part of the protective cover 15 through a thread gap of the proximity switch; the upper cover 4, the bonnet 13 and the shield 15 must therefore be sealed against the escape of gaseous medium.
O-shaped rings are additionally arranged at the joint of the bonnet 13 and the upper cover 4 and the joint of the protective cover 15 and the bonnet 13, a sealing joint 16 is additionally arranged at the leading-out port of the protective cover 15 close to a switch signal wire 17, and the O-shaped rings are arranged inside and outside the sealing joint 16 to prevent the gas medium leakage on the outer surface of the signal wire 17 and the external thread of the sealing joint 16.
As another embodiment of this embodiment, a wireless transmission module is further disposed outside the valve body 1, and the signal line 17 of the position sensor 14 is connected to the wireless transmission module. And the alarm is transmitted to a remote control room to alarm through wireless in an unattended station.
Further, the position sensor 14 is a dc two-wire normally open type explosion-proof electromagnetic proximity switch. The load voltage VL = VS-5V of the dc two-wire proximity switch in the ON state, and if the voltage VL is lower than the operating voltage of the load, the load cannot act. In the OFF state, a static current still flows through the load, resulting in a residual voltage of the load. Therefore, the working current and voltage of the load must be determined first to ensure the normal operation of the circuit. When the load current is lower than 5mA, please terminate the bleeder resistor at both ends of the load, and the residual voltage is lower than the reset voltage of the load by the current above 5 mA. Even when the proximity switch is turned OFF, the load has a residual voltage due to leakage current, and therefore, even if the load current is greater than 5mA, the reset voltage of the load needs to be confirmed before use. In particular, DC relays and DC counters are used as loads via the rectifier circuit.
Furthermore, an adjusting screw 18 is installed at the top of the valve rod 5, and the adjusting screw 18 is made of a magnetic material. The bonnet 13 is made of a magnetic material. The adjusting spring assembly comprises a lower spring seat 19, an adjusting spring 7, an upper spring seat 20 and an adjusting screw rod 12, wherein the adjusting spring 7 is arranged between the lower spring seat 19 and the upper spring seat 20, and the lower spring seat 19 is matched with the valve rod 5 through a limiting step on the valve rod 5; the upper spring seat 20 is in contact connection with the adjusting screw 12, and the adjusting screw 12 is in threaded connection with the top end of the upper cover 4.
Claims (8)
1. The spring type safety valve comprises a valve body (1), a valve seat (2), a valve clack (3), an upper cover (4), a valve rod (5), a guide sleeve (6), an adjusting spring assembly and a recoil disc (8), wherein the valve body (1) is provided with an air inlet (9) and a discharge port (10), and an opening at the upper end of the valve body (1) is hermetically connected with the upper cover (4); an air inlet joint (11) is arranged at the air inlet (9), and the valve seat (2) is assembled at the end part of the air inlet joint (11) extending into the valve body (1); the guide sleeve (6) is assembled in the valve body (1) through the upper cover (4) in a pressing mode, the recoil disc (8) is assembled in the guide sleeve (6) in a sliding mode, the valve clack (3) is assembled at the bottom of the recoil disc (8), and the valve clack (3) is in sealing fit with the valve seat (2); the lower end of the valve rod (5) penetrates through the upper cover (4) and the adjusting spring assembly to be connected with the upper end of the recoil disc (8); the method is characterized in that: the upper end of the valve rod (5) penetrates through an adjusting screw rod (12) of the spring adjusting assembly; a valve cap (13) is assembled at the top end of the upper cover (4) in a sealing mode, a position sensor (14) is assembled at the top of the valve cap (13) in a sealing mode, the position sensor (14) penetrates through the top of the valve cap (13) to be installed, a part of the position sensor (14) is located in the valve cap (13), a part of the position sensor (14) is located outside the valve cap (13), and the position sensor (14) is installed coaxially with the valve rod (5); a protective cover (15) is also assembled at the top end of the valve cap (13), a sealing joint (16) is arranged on the protective cover (15), and a signal wire (17) of the position sensor (14) penetrates through the sealing joint (16) and extends to the outside.
2. A spring loaded safety valve as claimed in claim 1, wherein: the valve body (1) is also externally provided with a wireless transmitting module, and a signal wire (17) of the position sensor (14) is connected with the wireless transmitting module.
3. A spring loaded safety valve as claimed in claim 1 or claim 2, wherein: the position sensor (14) is a direct current two-wire normally open type explosion-proof electromagnetic proximity switch.
4. A spring loaded safety valve as claimed in claim 3, wherein: an adjusting screw (18) is installed at the top of the valve rod (5), and the adjusting screw (18) is made of a magnetic material.
5. A spring loaded safety valve as claimed in claim 3, wherein: the valve cap (13) is made of a magnetic material.
6. A spring loaded safety valve as claimed in claim 1 or claim 2, wherein: o-shaped rings are additionally arranged at the joint of the bonnet (13) and the upper cover (4) and the joint of the passport and the bonnet (13).
7. A spring loaded safety valve as claimed in claim 1 or claim 2, wherein: the sealing joint (16) is internally and externally provided with O-shaped rings.
8. A spring loaded safety valve as claimed in claim 1 or claim 2, wherein: the adjusting spring assembly comprises a lower spring seat (19), an adjusting spring (7), an upper spring seat (20) and an adjusting screw rod (12), the adjusting spring (7) is arranged between the lower spring seat (19) and the upper spring seat (20), and the lower spring seat (19) is matched with the valve rod (5) through a limiting step on the valve rod (5); the upper spring seat (20) is in contact connection with the adjusting screw rod (12), and the adjusting screw rod (12) is in threaded connection with the top end of the upper cover (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122534991.XU CN216200906U (en) | 2021-10-21 | 2021-10-21 | Spring type safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122534991.XU CN216200906U (en) | 2021-10-21 | 2021-10-21 | Spring type safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216200906U true CN216200906U (en) | 2022-04-05 |
Family
ID=80886030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122534991.XU Active CN216200906U (en) | 2021-10-21 | 2021-10-21 | Spring type safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216200906U (en) |
-
2021
- 2021-10-21 CN CN202122534991.XU patent/CN216200906U/en active Active
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