CN101240860A - Safety valve - Google Patents
Safety valve Download PDFInfo
- Publication number
- CN101240860A CN101240860A CNA2008100186467A CN200810018646A CN101240860A CN 101240860 A CN101240860 A CN 101240860A CN A2008100186467 A CNA2008100186467 A CN A2008100186467A CN 200810018646 A CN200810018646 A CN 200810018646A CN 101240860 A CN101240860 A CN 101240860A
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- Prior art keywords
- valve
- flap
- connecting rod
- pressure
- spring
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- Safety Valves (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The present invention provides a safety valve, including a valve, a protecting cover set on the valve, a valve holder set on the valve and connected with the inlet pressure and the outlet pressure, a valve clack is set on the valve holder, when the medium pressure is larger than the closing force of the valve clack, the valve clack is located in the opening state; when the medium pressure is smaller than the closing pressure of the valve clack, the valve clack is located in the closing state; the valve clack has a connecting bar, the protecting cover has a switch, the switch has a contact; when the valve clack is on the opening state, the connecting bar presses the contact, the switch is triggered; when the valve clack is on the closing state, the connecting bar releases the contact, the switch is not triggered. The safety valve transforms the opening/closing actions of the valve clack to the electric signal by the switch, realizes sending the condition to the controlling room, capable of exactly recording the opening/closing courses of the safety valve.
Description
Technical field
The present invention relates to a kind of pressure that is used to limit the pressure system medium, prevent the pressure regulator of system overpressure, can be applied in the pressure system of gas medium, liquid medium or steam medium.
Background technique
Safety valve is a kind of automatic valve, and it is by any external force but utilize the power of medium itself to make valve opening, thereby discharges the medium of superpressure part, produces danger with the rated pressure value that prevents pressure Overpressure of a safety valve system.After pressure recovery was normal, flap was closed voluntarily under the effect of spring force and is stoped medium to continue to discharge.Be installed in on-the-spot safety valve sometimes owing to be inconvenient to be provided with watch-dog, so the keying of flap can not be by record accurately.
Summary of the invention
The object of the invention is exactly the safety valve that a kind of switching motion of flap that can the accurate recording valve is provided in order to overcome the deficiencies in the prior art.
For achieving the above object, the technical solution used in the present invention is: a kind of safety valve, comprise valve body, be arranged on safety cover on the described valve body, be arranged on the valve seat that is connected with pressure entrance and outlet on the described valve body, described valve seat is provided with flap, when the pressure of medium during greater than the closing force of flap, described flap is in opening state, and this moment, pressure entrance was connected with outlet, and safety valve is in depressurization phase; When the pressure of medium during less than the closing force of flap, described flap is in closed state, and this moment, pressure entrance was not communicated with mutually with exporting; Described flap is provided with connecting rod, also is provided with switch on the described safety cover, and described switch has the contact; When described flap was in opening state, described contact was depressed by described connecting rod, and described switch is triggered; When described flap was in closed state, described contact was decontroled by described connecting rod, and described switch is not triggered.
Also be provided with the indicating circuit of the state that is used to indicate described flap on the described valve body, described indicating circuit is connected with described switch.
Described safety cover is provided with joint, offers pilot hole on the described joint, and described connecting rod can move by easy on and off in described pilot hole.
Described switch is a position limit switch.
Described flap contacts with the underpart of a valve rod, the outside of described valve rod is arranged with pressure adjusting spring, the underpart of described pressure adjusting spring contacts with described valve rod by lower spring cup, the upper end portion of described pressure adjusting spring contacts with the adjustment screw rod by upper spring seat, what described adjustment screw rod can move up and down is arranged on the described valve body, and described pressure adjusting spring is in compressive state and its expansionary force is resisted mutually with the pressure medium that acts on the described flap; Be connected by joint between the upper end portion of described valve rod and the underpart of described connecting rod, described joint comprises the spring between the underpart of the upper end portion that is connected described valve rod and described connecting rod, does not contact between the upper end portion of described valve rod and the underpart of described connecting rod.Described spring is in confined state always.The elasticity coefficient of described spring is less than one of percentage of the elasticity coefficient of described pressure adjusting spring.The upper end of described valve rod is fixed with nut, and described spring housing is located on the described connecting rod and the underpart is resisted against on the described nut, the upper end portion is resisted against on the described connecting rod.
Because technique scheme utilization, the present invention compared with prior art has following advantage: this kind safety valve can be converted into electrical signal by position limit switch with the action of the keying of flap, thereby the situation at scene can be delivered to the control room, accurately the opening-closing process of record security valve.
Description of drawings
Fig. 1 is a main pseudosection of the present invention;
Fig. 2 is the partial enlarged drawing of A part among Fig. 1;
Wherein, 1, valve body, 11, pressure entrance, 12, valve seat; 13, outlet, 14, flap, 15, valve rod, 16, pressure adjusting spring; 17, safety cover, 2, joint, 19, valve gap, 20, upper spring seat; 21, nut, 22, spring, 23, adjust screw rod, 24, lower spring cup; 3, connecting rod, 4, joint, 41, pilot hole; 5, switch, 51, the contact, 6, indicating circuit.
Embodiment
Below the specific embodiment of the present invention is described:
For safety valve, it comprises valve body 1, and described valve body 1 is provided with valve seat 12, the pressure entrance 11 of this valve seat 12 and valve and export 13 and be connected; Described valve seat 12 places also are provided with flap 14, the pressure that acts on the medium on this flap 14 is resisted mutually with the spring expansionary force that acts on the pressure adjusting spring 16 on this flap 14, when the pressure of medium is lower than the setting value of pressure adjusting spring 16, described flap 14 is sealed described valve seat 12, and medium can not flow to outlet 13 by valve seat 12; When the pressure of medium was higher than the setting value of pressure adjusting spring 16, described flap 14 was separated by the pressure jack-up of medium and with described valve seat 12, made the hydraulic system release thereby medium flows to outlet 13 by valve seat 12.
Described flap 14 leans with the underpart of valve rod 15, described pressure adjusting spring 16 be set in described valve rod 15 the outside and owing to the expansionary force of described pressure adjusting spring 16 make described valve rod 15 and described flap 14 mutually closely against, when the pressure of medium is lower than the setting value of pressure adjusting spring 16, described valve rod 15 all is in described pressure entrance 11 and the closed mutually closed state of outlet 13 with described flap 14, and this moment, pressure entrance 11 was in off state with outlet 13; When the pressure of medium was higher than the setting value of spring 16, described valve rod 15 all was in described pressure entrance 11 and outlet 13 opening states that are connected with described flap 14, and this moment, pressure entrance 11 was in connected state with outlet 13.Described valve body 1 also has safety cover 17, valve gap 19, in the two is housed in above-mentioned each parts.
Specifically, the upper end portion of described pressure adjusting spring 16 is connected with upper spring seat 20, the underpart is connected with lower spring cup 24, described lower spring cup 24 is resisted against on the described valve rod 15, described upper spring seat 20 is connected with valve gap 19 by adjusting screw rod 23, and adjustment screw rod 23 valve gap 19 relatively slides up and down and then adjust the relative distance between upper spring seat 20 and the lower spring cup 24 and the amount of being compressed of pressure adjusting spring 16.
The upper end of described valve rod 15 is connected with connecting rod 3, also is provided with the switch 5 with contact 51 on the described safety cover 17, and when described valve rod 15 was in the jack-up state, described connecting rod 3 was depressed described contact 51, and described switch 5 is triggered; When described valve rod 15 was in pressed status, described connecting rod 3 was decontroled described contact 51, and described switch 5 is not triggered.The output signal of described switch 5 can be used for the condition monitoring of control system to this safety valve.
Also be provided with the indicating circuit 6 of the state that is used to indicate described flap 14 on the described safety cover 17; can have tutorial light in the described indicating circuit 6; the explanation safety valve is lighted at release, tutorial light when described contact 51 is depressed, and the pressure of explanation pressure entrance 11 is closed less than setting value, the tutorial light of safety valve when described contact 51 is decontroled.
Described safety cover 17 is provided with joint 4, offers pilot hole 41 on the described joint 4, and described connecting rod 3 can move by easy on and off in described pilot hole 41, and leading role is played in the motion of 41 pairs of described connecting rods 3 of described pilot hole.
Again further, be connected by joint 2 between the underpart of the upper end portion of described valve rod 15 and described connecting rod 3.Referring to Fig. 2, described joint 2 comprises the spring 22 between the underpart of the upper end portion that is arranged on described valve rod 15 and described connecting rod 3, so that do not contact between the underpart of the upper end portion of described valve rod 15 and described connecting rod 3.Because the action of gravity of described connecting rod 3, described spring 22 is in confined state always.The elasticity coefficient of described spring 22 is far smaller than the elasticity coefficient of described pressure adjusting spring 16, and the elasticity coefficient of preferred spring 22 is less than one of percentage of the elasticity coefficient of pressure adjusting spring 16.The upper end of described valve rod 15 is fixed with nut 21, and described spring 22 is set on the described connecting rod 3 and the underpart is resisted against on the described nut 21, the upper end portion is resisted against on the described connecting rod 3.
The effect of described spring 22 mainly is: make not contact between the underpart of upper end portion and described connecting rod 3 of described valve rod 15, so when valve rod 15 rises, valve rod 15 first pressure springs 22, thereby compressed then spring 22 conducts to connecting rod 3 with expansionary force and promotes connecting rod 3 risings, connecting rod 3 is the contact 51 of touch switch 5 again, in other words, described valve rod 15 does not directly contact all the time with described connecting rod 3, even so described connecting rod 3 is resisted against on the described contact 51, described valve rod 15 can not produce very big active force to connecting rod 3 yet, because the stroke ratio of the contact 51 on the switch 5 is less, and the stroke ratio of valve rod 15 is bigger, therefore, adopt the mode of this " elasticity connection ", can effectively avoid damaging greatly the situation of switch 5 owing to the stroke of the contact 51 on the stroke ratio switch 5 of valve rod 15.
The above embodiment is only in order to embody the present invention's inventive concept; it is not the qualification that is used for the invention mode of execution; for example; safety valve for heavy hammer type; also can not need create being about to principle of the present invention and using up, the embodiment of the therefore every the present invention's of meeting design all belongs to protection scope of the present invention.
Claims (8)
1, a kind of safety valve, comprise valve body (1), be arranged on safety cover (17) on the described valve body (1), be arranged on the valve seat (12) that is connected with pressure entrance (11) and outlet (13) on the described valve body (1), described valve seat (12) is provided with flap (14), when the pressure of medium during greater than the closing force of flap (14), described flap (14) is in opening state, pressure entrance this moment (11) is connected with outlet (13), and safety valve is in depressurization phase; When the pressure of medium during less than the closing force of flap (14), described flap (14) is in closed state, and pressure entrance this moment (11) is not communicated with mutually with exporting (13),
It is characterized in that: described flap (14) is provided with connecting rod (3), also is provided with switch (5) on the described safety cover (17), and described switch (5) has contact (51);
When described flap (14) when being in opening state, described contact (51) are depressed by described connecting rod (3), and described switch (5) is triggered; When described flap (14) when being in closed state, described contact (51) are decontroled by described connecting rod (3), and described switch (5) is not triggered.
2, safety valve according to claim 1 is characterized in that: also be provided with the indicating circuit (6) of the state that is used to indicate described flap (14) on the described valve body (1), described indicating circuit (6) is connected with described switch (5).
3, safety valve according to claim 1; it is characterized in that: described safety cover (17) is provided with joint (4); offer pilot hole (41) on the described joint (4), described connecting rod (3) can move by easy on and off in described pilot hole (41).
4, safety valve according to claim 1 is characterized in that: described switch (5) is a position limit switch.
5, safety valve according to claim 1, it is characterized in that: described flap (14) contacts with the underpart of a valve rod (15), the outside of described valve rod (15) is arranged with pressure adjusting spring (16), the underpart of described pressure adjusting spring (16) contacts with described valve rod (15) by lower spring cup (24), the upper end portion of described pressure adjusting spring (16) contacts with adjustment screw rod (23) by upper spring seat (20), what described adjustment screw rod (23) can move up and down is arranged on the described valve body (1), and described pressure adjusting spring (16) is in compressive state and its expansionary force is resisted mutually with the pressure medium that acts on the described flap (14);
Be connected by joint (2) between the upper end portion of described valve rod (15) and the underpart of described connecting rod (3), described joint (2) comprises the spring (22) between the underpart of the upper end portion that is connected described valve rod (15) and described connecting rod (3), does not contact between the upper end portion of described valve rod (15) and the underpart of described connecting rod (3).
6, safety valve according to claim 5 is characterized in that: described spring (22) is in confined state always.
7, safety valve according to claim 5 is characterized in that: the elasticity coefficient of described spring (22) is less than one of percentage of the elasticity coefficient of described pressure adjusting spring (16).
8, safety valve according to claim 5, it is characterized in that: the upper end of described valve rod (15) is fixed with nut (21), and described spring (22) is set on the described connecting rod (3) and the underpart is resisted against on the described nut (21), the upper end portion is resisted against on the described connecting rod (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100186467A CN100572875C (en) | 2008-03-06 | 2008-03-06 | Safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100186467A CN100572875C (en) | 2008-03-06 | 2008-03-06 | Safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101240860A true CN101240860A (en) | 2008-08-13 |
| CN100572875C CN100572875C (en) | 2009-12-23 |
Family
ID=39932588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2008100186467A Active CN100572875C (en) | 2008-03-06 | 2008-03-06 | Safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100572875C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694246B (en) * | 2009-09-15 | 2011-06-15 | 吴江市东吴机械有限责任公司 | Damping safety valve |
| CN103016162A (en) * | 2012-11-12 | 2013-04-03 | 浙江博力机电制造有限公司 | Constant-pressure automobile exhaust auxiliary brake device |
| CN104913091A (en) * | 2015-05-29 | 2015-09-16 | 中国石油天然气股份有限公司 | Adjustable visible alarm type safety valve |
| CN109707881A (en) * | 2018-12-17 | 2019-05-03 | 陕西科技大学 | A kind of spring spool |
| CN110686106A (en) * | 2019-11-28 | 2020-01-14 | 谢淑娥 | Safety valve with advance safeguard function |
-
2008
- 2008-03-06 CN CNB2008100186467A patent/CN100572875C/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694246B (en) * | 2009-09-15 | 2011-06-15 | 吴江市东吴机械有限责任公司 | Damping safety valve |
| CN103016162A (en) * | 2012-11-12 | 2013-04-03 | 浙江博力机电制造有限公司 | Constant-pressure automobile exhaust auxiliary brake device |
| CN104913091A (en) * | 2015-05-29 | 2015-09-16 | 中国石油天然气股份有限公司 | Adjustable visible alarm type safety valve |
| CN109707881A (en) * | 2018-12-17 | 2019-05-03 | 陕西科技大学 | A kind of spring spool |
| CN110686106A (en) * | 2019-11-28 | 2020-01-14 | 谢淑娥 | Safety valve with advance safeguard function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100572875C (en) | 2009-12-23 |
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