CN112443701A - Locking structure and fire prevention check valve - Google Patents
Locking structure and fire prevention check valve Download PDFInfo
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- CN112443701A CN112443701A CN201910812091.1A CN201910812091A CN112443701A CN 112443701 A CN112443701 A CN 112443701A CN 201910812091 A CN201910812091 A CN 201910812091A CN 112443701 A CN112443701 A CN 112443701A
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- valve seat
- temperature sensing
- sensing element
- valve
- plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K35/00—Means to prevent accidental or unauthorised actuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
- F16K15/033—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
- F16K17/38—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
- F16K17/383—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature the valve comprising fusible, softening or meltable elements, e.g. used as link, blocking element, seal, closure plug
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a locking structure and a fireproof check valve, which are used for optimizing the structure of the fireproof check valve, in particular to the structure of the locking structure. The locking structure comprises a valve seat, a connecting rod, a first elastic element, a shifting piece and a second elastic element, wherein the shifting piece and the connecting rod are respectively connected with the valve seat in a rotating mode, the first elastic element is used for driving the connecting rod to rotate relative to the valve seat, the second elastic element is used for driving the shifting piece to rotate relative to the valve seat, the locking structure further comprises a stop plate and a temperature sensing element, the temperature sensing element is fixedly arranged on the valve seat, the stop plate is connected with the valve seat in a rotating mode, the temperature sensing element works, the second elastic element pushes the stop plate to rotate and abut against the temperature sensing element through the shifting piece, and when the temperature sensing element stops working, the second elastic element drives the connecting rod to rotate through the shifting piece, so that the connecting rod drives the valve block to close the exhaust port.
Description
Technical Field
The invention relates to a locking structure and a fireproof check valve.
Background
The utility model discloses an application number 201820551450.3's utility model discloses an oil extraction flue gas fire prevention check valve, its structure includes valve body and valve block, the valve body is inside to have the oil smoke gas passageway, the both ends of valve body have seted up relatively and have communicated the inlet port and the port of giving vent to anger of oil smoke gas passageway, the axial cross-section of valve body is trapezoidal, the port of giving vent to anger sets up in the inclined plane of valve body, the valve block articulate in the valve body, and with the valve body constitutes the normal close formula cooperation structure that can open when the air current strikes, the through-hole has been seted up to the bottom of valve body, and the fuse wire is placed in this through-hole and upwards stretches out downwards; the oil fume channel of the valve body is provided with a fireproof resetting mechanism for resetting the valve plate, the fireproof resetting mechanism comprises a connecting part and a forced closing part, two ends of the connecting part are oppositely hinged to the inner wall of the valve body and the surface of the valve plate, one end of the forced closing part is hinged to the connecting part, and the other end of the forced closing part extrudes or pulls the fuse wire to extend out of the through hole upwards; when the temperature inside or outside the oil fume channel exceeds the fusing temperature of the fuse wire, the fuse wire is fused, and the forced closing part presses down the connecting part to forcibly close the air outlet port of the valve body.
The connecting part comprises a base fixed on the inner wall of the valve body, a rotating rod connected to the base through a rotating shaft, and an arc-shaped rod hinged with the rotating rod and the surface of the valve plate; a clamping groove is formed in the surface of the rotating rod, a first torsion spring is wound on the first rotating shaft, and the first torsion spring is connected with the rotating rod and the base; the forced closing part comprises a pressing bracket and a linkage bracket; one end of the lower pressing support is provided with a clamping hole, the other end of the lower pressing support is hinged to the base through a second rotating shaft, a second torsion spring is wound on the second rotating shaft, and the second torsion spring is connected with the lower pressing support and the base; the linkage support is obliquely arranged, the linkage support is obliquely hooked upwards to be clamped in a clamping hole of the lower pressing support, and the linkage support obliquely downwards extrudes or pulls the part of the fuse wire upwards extending out of the through hole; when the fuse wire is fused, the pushing support is in pushing under the action of the second torsion spring, the linkage support and the rotating rod are connected to each other through the pushing support in a clamped mode of the rotating rod, and the arc-shaped rod pulls the valve plate to be forcibly closed at the air outlet port of the valve body.
However, the existing fireproof check valve has the following defects that 1, the fireproof check valve has a complex structure; the valve plate is hinged with the valve body, and the valve plate is connected with the valve body through a connecting part. 2. The connecting part is only used for connecting the valve plate and the valve body; because the arc-shaped rod is hinged with the rotating rod, the arc-shaped rod and the rotating rod only have the function of connecting the valve plate and the base. 3. The fire-proof check valve has the problem of smoke leakage; when the through hole is opened at the bottom of the valve body, the indoor and outdoor gas circulation paths are communicated by the through hole, namely, the indoor flue gas can enter the outdoor space through the through hole, and the outdoor flue gas can enter the indoor space through the through hole.
Disclosure of Invention
The invention aims to provide a locking structure and a fireproof check valve, so as to optimize the structure of the fireproof check valve, in particular to optimize the structure of the locking structure.
In order to solve the above problems, the present invention provides the following technical solutions:
the locking structure comprises a valve seat, a connecting rod, a first elastic element, a shifting piece and a second elastic element, wherein the shifting piece and the connecting rod are respectively connected with the valve seat in a rotating mode, the first elastic element is used for driving the connecting rod to rotate relative to the valve seat, the second elastic element is used for driving the shifting piece to rotate relative to the valve seat, the locking structure further comprises a stop plate and a temperature sensing element, the temperature sensing element is fixedly arranged on the valve seat, the stop plate is connected with the valve seat in a rotating mode, the temperature sensing element works, the second elastic element pushes the stop plate to rotate and abut against the temperature sensing element through the shifting piece, and when the temperature sensing element stops working, the second elastic element drives the connecting rod to rotate through the shifting piece, so that the connecting rod drives the valve block to close the exhaust port.
In the invention, the stop plate is rotatably connected with the valve seat, when the temperature sensing element works, the second elastic element pushes the stop plate to rotate through the shifting piece and abut against the temperature sensing element, and as the temperature sensing element is fixedly arranged on the valve seat (in other words, the temperature sensing element is fixedly connected with the valve seat to limit the installation position of the temperature sensing element on the valve seat), after the second elastic element pushes the stop plate to rotate through the shifting piece and abut against the temperature sensing element, the temperature sensing element prevents the second elastic element from pushing the shifting piece to rotate through the stop plate, so that the shifting piece is kept in a static state. By the design, an auxiliary structure required for keeping the poking sheet still in a normal temperature environment is changed.
In the invention, the temperature sensing element is fixedly arranged on the valve seat, so that a hole for arranging the temperature sensing element is not required on the valve body. So design, through optimizing locking structure, effectively stopped the fire prevention check valve and taken place the phenomenon of leaking the cigarette because of the valve body trompil to realize improving fire prevention check valve's reliability.
The connecting rod of the embodiment is used for directly connecting the valve seat and the valve plate, when the connecting rod is used for directly connecting the valve seat and the valve plate, the connecting rod does not need to be hinged with the valve body by virtue of a rotating shaft (in the background art, the valve plate is hinged with the valve body, and when the valve plate and the valve plate are hinged, the valve plate can be hinged by virtue of the rotating shaft) to open or close the exhaust port of the valve plate in a normal temperature environment. So design, through optimizing locking structure, effectively reduce the required part quantity of fire prevention check valve to realize reducing fire prevention check valve's manufacturing cost and shortening fire prevention check valve's production cycle.
In addition, the technical characteristic that the second elastic element drives the connecting rod to rotate through the shifting sheet so that the connecting rod drives the valve plate to close the exhaust port can be obtained, and the connecting rod can drive the valve plate to close the exhaust port in a high-temperature environment. So design through optimizing locking structure for the exhaust port can be closed to the connecting rod homoenergetic under normal atmospheric temperature environment and high temperature environment, in order to realize increasing the service environment of connecting rod.
Preferably, the stopper plate is provided with a lower clamping groove, and when the temperature sensing element works, an included angle between a notch of the lower clamping groove and the exhaust port is smaller than 90 degrees.
Preferably, a fastening mechanism is arranged on the valve seat, the temperature sensing element is arranged on the fastening mechanism, a stopping section and a clamping section with notches are arranged on the lower clamping groove, the temperature sensing element is clamped in the clamping section, and the stopping section is used for preventing the temperature sensing element from withdrawing from the clamping section.
Preferably, a hinge joint is arranged between the stop plate and the valve seat, a clamping block used for clamping the shifting piece is further arranged on the stop plate, the clamping block and the stop plate are arranged in a staggered mode, and the spacing distance between the clamping block and the hinge joint is larger than the spacing distance between the lower clamping groove and the hinge joint.
Preferably, the temperature sensing element is sandwiched between the fastening mechanism and the valve seat.
Preferably, the temperature sensing element is a solder ring, the fastening mechanism comprises a screw, the screw is in threaded connection with the valve seat, and the solder ring is clamped between the screw head and the outer side wall of the valve seat; or, the fastening mechanism comprises a bolt and a nut, the bolt penetrates through the valve seat and then is in threaded connection with the nut, and the brazing ring is clamped between the head of the bolt and the outer side wall of the valve seat; or the fastening mechanism comprises a rivet, the rivet is riveted on the valve seat, and the brazing ring is clamped between the rivet head and the outer side wall of the valve seat.
Preferably, the plectrum is provided with a first extension section extending outwards and a second extension section extending from the first extension section to the length direction of the plectrum, and when the temperature sensing element works, the second extension section is arranged upwards and encloses with the first extension section and the plectrum to form an upper clamping groove for clamping the upper part of the stop plate.
Preferably, the connecting rod is provided with a containing hole, a stopping part is arranged in the containing hole, and the shifting piece is clamped in the stopping part after the temperature sensing element stops working.
Preferably, the shifting piece comprises a first connecting plate, a second connecting plate and a locking plate used for connecting the first connecting plate and the second connecting plate, the first connecting plate and the second connecting plate are respectively connected with the valve seat in a rotating mode, a locking surface used for being attached to the stopping portion is arranged on the locking plate, and the locking plate penetrates through the accommodating hole and is attached to the stopping portion through the locking surface.
The fireproof check valve comprises a valve body, a valve block and a locking structure, wherein the valve block is connected with the valve body through the locking structure, and the locking structure is any one of the technical schemes.
Drawings
FIG. 1 is a perspective view of a fire check valve in a preferred embodiment of the present invention;
FIG. 2 is a front view of a fire check valve in a preferred embodiment of the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 4 is a perspective view of a locking structure in a preferred embodiment of the present invention;
FIG. 5 is a perspective view of a stop plate in accordance with a preferred embodiment of the present invention;
FIG. 6 is a perspective view of a connecting rod in accordance with a preferred embodiment of the present invention;
fig. 7 is a perspective view of a paddle in a preferred embodiment of the invention.
Detailed Description
The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Example one
Referring to fig. 1 and 4, the locking structure 300 includes a valve seat 1, a connecting rod 2, a first elastic element 3, a dial 4 and a second elastic element 5, wherein the dial 4 and the connecting rod 2 are respectively rotatably connected to the valve seat 1, the first elastic element 3 is used for driving the connecting rod 2 to rotate relative to the valve seat 1, and the second elastic element 5 is used for driving the dial 4 to rotate relative to the valve seat 1.
The way that plectrum 4 and valve seat 1 rotate to be connected has the multiple, because this embodiment does not improve this structure, therefore, this embodiment only lists one of them plectrum 4 and the scheme of valve seat 1 rotation connection for the reference: referring to fig. 4, a first shaft hole is formed in the shifting piece 4, a second shaft hole is formed in the valve seat 1, and a second shaft rod penetrates through the first shaft hole and the second shaft hole to realize that the shifting piece 4 is rotatably connected with the valve seat 1. The mode of the connecting rod 2 rotatably connecting with the valve seat 1 can refer to the mode of "the plectrum 4 rotatably connecting with the valve seat 1", that is, the first shaft rod penetrates through the third shaft hole on the connecting rod and the fourth shaft hole on the valve seat to realize the rotatable connection of the connecting rod 2 with the valve seat 1.
The first elastic element 3 and the second elastic element 5 may be one or more of a tension spring, a compression spring, and a torsion spring, and as can be seen from fig. 4, the first elastic element 3 and the second elastic element 5 of this embodiment selectively use a torsion spring, wherein the first elastic element 3 is sleeved on the first shaft rod, one of the torsion arms of the first elastic element 3 is disposed on the connecting rod 3, and the other torsion arm of the first elastic element 3 is disposed on the valve seat 1, so that the connecting rod 2 always keeps a tendency of driving the valve plate 200 to close the exhaust port 1001; the second elastic element 5 is sleeved on the second shaft rod,
one of the torque arms of the second elastic element 5 is provided on the pick 4, and the other torque arm of the second elastic element 5 is provided on the valve seat 1, so that the pick 4 always keeps a tendency of driving the stop plate 6 to press the temperature sensing element 7.
Referring to fig. 2 and 3, the locking structure 300 further includes a stop plate 6 and a temperature sensing element 7, the temperature sensing element 7 is fixedly disposed on the valve seat 1, the stop plate 6 is rotatably connected to the valve seat 1, when the temperature sensing element 7 works, the second elastic element 5 pushes the stop plate 6 to rotate through the dial 4 and abut against the temperature sensing element 7, and when the temperature sensing element 7 stops working, the second elastic element 5 drives the connecting rod 3 to rotate through the dial 4, so that the connecting rod 3 drives the valve plate 200 to close the exhaust port 1001.
It should be noted that: in this embodiment, the temperature sensing element 7 is a fusible solder, the fusible solder includes a solder of a secret base, an indium base, a tin base, a cadmium base, a zinc base, a lead base, and the like, and in a normal temperature environment, the temperature sensing element 7 does not deform to keep a working state, and at this time, the second elastic element 5 pushes the stop plate 6 to rotate through the pull piece 4 and abuts against the temperature sensing element 7, so that the pull piece 4 keeps a static state; under the high temperature environment, the temperature sensing element 7 is heated and melted into liquid to exit from the working state, and at this time, the second elastic element 5 drives the connecting rod 2 to rotate through the shifting piece 4, so that the connecting rod 2 drives the valve sheet 200 to close the exhaust port 1001. Certainly, the temperature sensing element 7 may also be a memory metal, and in a normal temperature environment, the memory metal itself does not deform and is located on a movement path of the stopper plate 6, at this time, the second elastic element 5 pushes the stopper plate 6 to rotate through the plectrum 4 and abuts against the temperature sensing element 7, so that the plectrum 4 is kept in a stationary state; under the high temperature environment, the memory metal is heated to deform and stagger with the stop plate 6, and at this time, the second elastic element 5 drives the connecting rod 2 to rotate through the shifting piece 4, so that the connecting rod 2 drives the valve sheet 200 to close the exhaust port 1001.
Referring to fig. 3 and 5, the stopper plate 6 is provided with a lower engaging groove 31, when the temperature sensing element 7 works, an included angle between the notch of the lower engaging groove 31 and the exhaust port 1001 is a, a is smaller than 90 °, and when a is smaller than 90 °, the second elastic element 5 pushes the stopper plate 6 to rotate through the shifting piece 4, so that the groove wall of the lower engaging groove 31 facing away from the notch always keeps the extrusion force on the temperature sensing element 7.
Referring to fig. 4 and 5, a fastening mechanism 8 is arranged on the valve seat 1, the temperature sensing element 7 is arranged on the fastening mechanism 8, a stopping section 312 and a clamping section 311 with notches are arranged on the lower clamping groove 31, the temperature sensing element 7 is clamped in the clamping section 311, and the stopping section 312 is used for preventing the temperature sensing element 7 from withdrawing from the clamping section 311. By such a design, the movement range of the stopper plate 6 relative to the temperature sensing element 7 is further reduced, and the connecting strength between the stopper plate 6 and the temperature sensing element 7 is increased by the retaining section 312.
In this embodiment, the stop plate 6 is rotatably connected to the valve seat 1, and as can be seen from fig. 5, the stop plate 6 is provided with a mounting hole 33, and when a mounting rod is provided on the valve seat 1 (only one of the stop plates 6 is rotatably connected to the valve seat 1 is illustrated here), the mounting rod is inserted into the mounting hole 33, so as to rotatably connect the stop plate 6 to the valve seat 1. In this structure, since the stopper plate 6 is rotatably connected to the valve seat 1, there is a hinge between the stopper plate 6 and the valve seat 1, and the "hinge" is a mounting hole 33 or a mounting rod.
Referring to fig. 4 and 5, a fixture block 32 for clamping the paddle 4 is further disposed on the stopper plate 6, the fixture block 32 and the stopper plate 6 are arranged in a staggered manner, and a distance between the fixture block 32 and the hinge is greater than a distance between the lower fixture groove 31 and the hinge, and when the distance between the fixture block 32 and the hinge is greater than a distance between the lower fixture groove 31 and the hinge, the stopper plate 6 makes the lower fixture groove 31 pass through a smaller extrusion force by using a "lever principle" to keep the paddle 4 stationary. By the design, the acting force of the stop plate 6 on the temperature sensing element 7 is reduced, so that the probability of deformation of the temperature sensing element 7 in a normal temperature environment is reduced.
The temperature sensing element 7 is clamped between the fastening mechanism 8 and the valve seat 1, the temperature sensing element 7 and the fastening mechanism 8 have many alternatives, taking the temperature sensing element 7 as an example, the temperature sensing element can be selected from a solder ring, a solder block, an arc solder segment and the like, in the embodiment, the temperature sensing element 8 is preferably a solder ring, when the temperature sensing element 8 is a solder ring, the fastening mechanism 8 can comprise a screw, the fastening mechanism 8 can comprise a bolt and a nut, the fastening mechanism 8 can further comprise a rivet, when the fastening mechanism 8 comprises a screw, the screw is in threaded connection with the valve seat 1, and the solder ring is clamped between the screw head and the outer side wall of the valve seat 1; when the fastening mechanism 8 comprises a bolt and a nut, the bolt penetrates through the valve seat 1 and then is in threaded connection with the nut, and the brazing filler metal ring is clamped between the head of the bolt and the outer side wall of the valve seat 1; when the fastening mechanism 8 comprises a rivet, the rivet is riveted on the valve seat 1, and the brazing filler metal ring is clamped between the head of the rivet and the outer side wall of the valve seat 1.
Referring to fig. 7, a first extending section 42 extending outward and a second extending section 43 extending from the first extending section 42 to the length direction of the dial 4 are provided on the dial 4, in this embodiment, the locking structure shown in fig. 4 is a working state of the sensing element 7, and when the sensing element 7 works, the second extending section 43 faces upward and encloses with the first extending section 42 and the dial 4 to form an upper engaging groove 41 for engaging with the upper portion of the detent plate 6 (the upper portion of the detent plate 6 refers to the engaging block 32). Due to the design, the shifting piece 4 can prevent the clamping block 32 from exiting the upper clamping groove 41 from three directions, so that the shifting piece 4 and the stop plate 6 are always kept in a clamping state. Of course, in other embodiments of the present invention, the connection manner of the shifting block and the stop plate is not limited to clamping, but the shifting block and the stop plate can be connected by screw, hinge, abutting, etc.
Referring to fig. 6, the connecting rod 2 is provided with a receiving hole 21, a stopper 22 is provided in the receiving hole 21, and the pull tab 4 is engaged with the stopper 22 after the operation of the temperature sensing element 8 is stopped.
As can be seen from fig. 6, the receiving hole 21 is a circumferentially closed through hole, and when the receiving hole 21 is a circumferentially closed through hole, the shifting piece 4 is preferably of an open structure, that is, the shifting piece 4 includes a first connecting plate, a second connecting plate and a locking plate for connecting the first connecting plate and the second connecting plate, the first connecting plate and the second connecting plate are respectively rotatably connected with the valve seat 1, the locking plate is provided with a locking surface 44 for engaging with the stopper 22, and the locking plate penetrates through the receiving hole 21 and engages with the stopper 22 through the locking surface 44.
In this embodiment, the locking surface 44 abuts against the stopper surface 221 of the stopper 22 when the temperature sensing element 7 stops operating, and this structure increases the contact area between the paddle 4 and the link 2 after the operation stops. By the design, the contact area of the plectrum 4 with the connecting rod 2 after the plectrum stops working is increased, so that the probability of shaking of the connecting rod 2 in a high-temperature environment is reduced.
Example two
Referring to fig. 1 and 3, the fire prevention check valve includes a valve body 100, a valve sheet 200, and a locking structure 300, the valve body 100 having a vent 1001, the valve sheet 200 being connected to the valve body 100 through the locking structure 300, the locking structure 300 closing the vent 1001 through the valve sheet 200.
In this embodiment, the locking structure 300 is the locking structure described in the first embodiment. As can be seen from fig. 3, the locking structure 300 is connected with the valve plate 200 through the connecting rod 2, and the locking structure 300 is connected with the inner wall of the valve body 100 through the valve seat 1. The connecting rod 2 and the valve plate 200 can be connected in a rotating manner, the connecting rod 2 and the valve plate 200 can also be connected in a fixed manner, but the connecting manner of the valve seat 1 and the inner wall of the valve body 100 is mostly selected to be in a fixed connection.
While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (10)
1. The locking structure comprises a valve seat, a connecting rod, a first elastic element, a shifting piece and a second elastic element, wherein the shifting piece and the connecting rod are respectively connected with the valve seat in a rotating mode, the first elastic element is used for driving the connecting rod to rotate relative to the valve seat, the second elastic element is used for driving the shifting piece to rotate relative to the valve seat.
2. The lock structure of claim 1, wherein the stopper plate is provided with a lower notch, and an angle between the notch of the lower notch and the exhaust port is smaller than 90 ° when the temperature sensing element is operated.
3. The locking structure of claim 2, wherein a fastening mechanism is disposed on the valve seat, the temperature sensing element is disposed on the fastening mechanism, a stopping section and a clamping section having a notch are disposed on the lower clamping groove, the temperature sensing element is clamped to the clamping section, and the stopping section is used for preventing the temperature sensing element from being withdrawn from the clamping section.
4. The locking structure of claim 3, wherein a hinge joint is formed between the stop plate and the valve seat, a clamping block for clamping the shifting piece is further arranged on the stop plate, the clamping block and the stop plate are arranged in a staggered mode, and the distance between the clamping block and the hinge joint is greater than the distance between the lower clamping groove and the hinge joint.
5. The latch structure of claim 3 wherein said temperature sensitive element is sandwiched between said fastening mechanism and said valve seat.
6. The lock structure of claim 5, wherein the temperature sensing element is a solder ring, the fastening means comprises a screw threadedly engaged with the valve seat, and the solder ring is sandwiched between the screw head and the outer side wall of the valve seat; or, the fastening mechanism comprises a bolt and a nut, the bolt penetrates through the valve seat and then is in threaded connection with the nut, and the brazing ring is clamped between the head of the bolt and the outer side wall of the valve seat; or the fastening mechanism comprises a rivet, the rivet is riveted on the valve seat, and the brazing ring is clamped between the rivet head and the outer side wall of the valve seat.
7. The lock-up structure of claim 1, wherein the pick is provided with a first extension section extending outward and a second extension section extending from the first extension section to the length direction of the pick, and when the temperature sensing element is operated, the second extension section is disposed upward and encloses an upper clamping groove for clamping the upper portion of the stop plate with the first extension section and the pick.
8. The lock-up structure of claim 1, wherein the connecting rod is provided with a receiving hole, a stopping part is arranged in the receiving hole, and the shifting piece is clamped with the stopping part after the temperature sensing element stops working.
9. The lock structure of claim 8, wherein the paddle includes a first connecting plate, a second connecting plate, and a lock plate for connecting the first connecting plate and the second connecting plate, the first connecting plate and the second connecting plate are rotatably connected to the valve seat, the lock plate has a lock surface for engaging the stopper, and the lock plate extends through the receiving hole and engages the stopper through the lock surface.
10. Fireproof check valve, including valve body, valve block and locking structure, the valve block with the valve body passes through locking structure and connects, characterized in that, locking structure is the locking structure of one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910812091.1A CN112443701A (en) | 2019-08-30 | 2019-08-30 | Locking structure and fire prevention check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910812091.1A CN112443701A (en) | 2019-08-30 | 2019-08-30 | Locking structure and fire prevention check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112443701A true CN112443701A (en) | 2021-03-05 |
Family
ID=74740860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910812091.1A Pending CN112443701A (en) | 2019-08-30 | 2019-08-30 | Locking structure and fire prevention check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112443701A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115479132A (en) * | 2022-09-28 | 2022-12-16 | 杭州西蒙电器有限公司 | Fireproof check valve for public flue |
-
2019
- 2019-08-30 CN CN201910812091.1A patent/CN112443701A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115479132A (en) * | 2022-09-28 | 2022-12-16 | 杭州西蒙电器有限公司 | Fireproof check valve for public flue |
| CN115479132B (en) * | 2022-09-28 | 2023-04-07 | 杭州西蒙电器有限公司 | Fireproof check valve for public flue |
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