CN213685515U

CN213685515U - Linkage protection device for normally open and normally closed states of valve

Info

Publication number: CN213685515U
Application number: CN202022451184.7U
Authority: CN
Inventors: 杜秦
Original assignee: Dalian Join King Fine Chemical Co ltd
Current assignee: Dalian Join King Fine Chemical Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-07-13
Anticipated expiration: 2030-10-29

Abstract

The utility model discloses a chain protection device about normally open normal close state of valve, which comprises a fixing part, rotating part and connecting strip, connect through the connecting strip between fixed part and the rotating part, one side of fixed part is equipped with at least one first connecting band, the opposite side of fixed part is equipped with at least one second connecting band, can connect between first connecting band and the second connecting band, make the fixed part, first connecting band and second connecting band are connected and are formed annular structure, be equipped with first through-hole on the fixed part, be equipped with the second through-hole on the rotating part, first through-hole and second through-hole can be passed to the valve rod, during the rotary valve rod, the second through-hole is rotatory thereupon, relative rotation takes place for rotating part and fixed part, destroy the connecting strip. The utility model discloses in can't accomplish not destroying chain protection device and change the valve aperture, avoid causing danger because of the maloperation, can guarantee the emergency operation of valve simultaneously, avoid the valve because of the safe risk that unable operation brought.

Description

Linkage protection device for normally open and normally closed states of valve

Technical Field

The utility model belongs to the valve auxiliary device, concretely relates to chain protection device about normally open normally closed state of valve.

Background

In chemical production, there are many scenarios to confirm the normally open or normally closed state of a valve, for example:

the storage tank for storing hazardous chemicals is provided with the nitrogen self-operated regulating valve for regulating the pressure of nitrogen in the storage tank to form nitrogen seal, the valves at the front and the back of the self-operated regulating valve are required to be normally opened, the problems of misoperation of staff and the like are avoided, the valves are closed to ensure that the storage tank is protected by losing the nitrogen seal, and the dangers of deflation, explosion and the like are caused.

Secondly, in continuous chemical production, the feeding valve needs to be normally opened, so that the problems of misoperation of staff and the like are avoided, the valve is closed to cut off the feeding of a system, the material unbalance and abnormal reaction are caused, the material loss is caused if the material is light, and the danger of over-temperature and over-pressure, explosion and the like is caused if the material is heavy.

The valve need guarantee to normally open under the manometer, avoids because staff maloperation scheduling problem, closes the valve and loses the pressure monitoring to in the container, causes dangers such as take out flat, explosion.

And fourthly, the front valve and the rear valve of the steam trap need to be normally opened, so that the problems of misoperation of staff and the like are avoided, and the danger of leakage, burn, explosion and the like caused by overpressure of steam of the jacket and the coil pipe due to the closing of the valves.

Under similar circumstances, the valve needs to be ensured to be in a normally open state or a normally closed state, and if no obvious warning sign exists, the valve is easily closed or opened by mistake, so that danger is caused to the production environment. Many valves hang the hang tag that shows the on-off state to this warning operating personnel, but the hang tag drops easily, even because operating personnel's carelessness, still can lead to the maloperation condition.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the proposition of above problem, and the research and design one kind is about the valve normally open chain protection device of normally closed state, solves because the valve on-off state does not definitely cause the maloperation to lead to the dangerous problem of production. The utility model discloses a technical means as follows:

the utility model provides an interlock protection device about normally open normal close state of valve, includes fixed part, rotating part and connecting strip, pass through between fixed part and the rotating part the connecting strip is connected, one side of fixed part is equipped with at least one first connecting band, the opposite side of fixed part is equipped with at least one second connecting band, can connect between first connecting band and the second connecting band, make fixed part, first connecting band and second connecting band are connected and are formed the loop configuration, be equipped with first through-hole on the fixed part, be equipped with the second through-hole on the rotating part, the valve rod can pass first through-hole and second through-hole, during the rotatory valve rod, the second through-hole is rotatory thereupon, relative rotation takes place for rotating part and fixed part, destroys the connecting strip.

Preferably, be equipped with the buckle on the first connecting band, be equipped with the cross tooth on the second connecting band, buckle and cross tooth cooperation are connected and are formed the ribbon structure.

Preferably, a worm is arranged on the first connecting belt, a through eye buckle is arranged on the second connecting belt, and the worm and the through eye buckle are connected in a matched mode to form a throat hoop structure.

Preferably, the shape of the second through hole is the same as the cross-sectional shape of the valve rod, and the periphery of the valve rod is attached to the inner wall of the second through hole.

Preferably, the fixing portion is provided with two first connecting belts and two second connecting belts, the fixing portion is provided with a groove, and the groove corresponds to the position of the bolt on the valve.

Preferably, the first through-hole with the rotating part is circular, the rotating part embedding in the first through-hole, the periphery of rotating part pass through the connecting strip with the inner wall connection of first through-hole, the shape of second through-hole is rectangle or oval.

Preferably, the fixed part or the rotating part is provided with an on or off identifier, and the on or off corresponds to the normally open or normally closed state of the valve.

Compared with the prior art, a chain protection device about normally open normally closed state of valve beneficial effect as follows:

1. the utility model discloses in through being connected between first connecting band and the second connecting band, lock the fixed part on the valve rod, the rotating part passes through the connecting strip and is connected fixedly with the fixed part, the laminating of the second through-hole that sets up on the rotating part and the valve rod outside plays the effect of locking the valve rod, overall structure has been in other words for the valve on the lock, guarantees normally producing or overhauls, when the maintenance operation, can not influence normal technological parameter because of the operation of false switch valve, causes danger even.

2. After the interlocking protection device is installed, the valve opening can not be changed without damaging the device, so that a series of dangers caused by changing the valve switching state due to misoperation of staff or failure of timely finding of the misoperation and the like are avoided; meanwhile, the emergency operation of the valve under emergency can be guaranteed by the device, namely the rotary valve rod drives the second through hole and the rotary part to rotate along with the valve rod, the locking of the valve is relieved by damaging the connecting strip, and the safety risk of the valve caused by incapability of operation is avoided.

Drawings

Fig. 1 is a schematic structural view in embodiment 1 of the present invention;

fig. 2 is a schematic view of an installation structure in embodiment 1 of the present invention;

fig. 3 is a schematic structural view in embodiment 2 of the present invention;

fig. 4 is a schematic structural view in embodiment 3 of the present invention.

In the figure, 1, a fixed part; 2. a rotating part; 3. a connecting strip; 4. a first connecting belt; 5. a second connecting band; 6. a ball valve; 7. a bolt; 11. a first through hole; 12. a groove; 21. a second via.

Detailed Description

Example 1:

as shown in fig. 1-2, an interlock protection device for a valve in a normally open and normally closed state comprises a fixed portion 1, a rotating portion 2 and a connecting strip 3, wherein the fixed portion 1 and the rotating portion 2 are connected through the connecting strip 3. One side of the fixing part 1 is provided with at least one first connecting belt 4, the other side of the fixing part 1 is provided with at least one second connecting belt 5, and the number of the first connecting belts 4 is the same as that of the second connecting belts 5. The first connecting belt 4 and the second connecting belt 5 can be connected with each other, so that the connection among the fixing part 1, the first connecting belt 4 and the second connecting belt 5 forms a ring structure, and the fixing part 1 is locked on the valve through the ring structure. Be equipped with first through-hole 11 on the fixed part 1, be equipped with second through-hole 21 on the rotating part 2, the valve rod can pass first through-hole 11 and second through-hole 21. When opening or closing the valve, rotatory valve rod earlier, second through-hole 21 is rotatory thereupon, and relative rotation takes place for rotating part 2 and fixed part 1, destroys connecting strip 3, and whole chain protection device is destroyed this moment, explains that the valve has changed its normal during operation normally closed or normally open state.

The tip of first connecting band 4 is equipped with the buckle, is equipped with a plurality of horizontal teeth on the second connecting band 5, and buckle and horizontal tooth can cooperate to connect and form the ribbon structure similar to the nylon ribbon. The locking positions of the buckle and the transverse teeth can be adjusted according to the size of the valve, so that the ribbon structure is suitable for valves of different sizes. And to the valve that needs keep normally open or normally closed state, this ribbon structure can firmly be fixed on the valve, under the prerequisite of not destroying the ribbon structure, can guarantee that whole chain protection device can not drop easily.

One side of fixed part 1 is equipped with two first connecting bands 4, and the opposite side is equipped with two second connecting bands 5, and two first connecting bands 4 correspond with two second connecting bands 5 respectively and are connected, form twice fixed knot and construct for it is more firm to lock between fixed part 1 and the valve. Be equipped with recess 12 on the fixed part 1 between two first connecting bands 4, also be equipped with recess 12 on the fixed part 1 between two second connecting bands 5 of its offside, when locking chain protection device on ball valve 6, recess 12 and the cooperation of gland bolt 7 on the ball valve 6 strengthen the locking effect to fixed part 1.

The shape of the second through hole 21 is the same as the cross section of the valve rod, the size of the second through hole 21 is slightly larger than the size of the cross section of the valve rod, and after the valve rod passes through the second through hole 21, the periphery of the valve rod is attached to the inner wall of the second through hole 21. The shape of the second through hole 21 may not be the same as the sectional shape of the valve stem, as long as it is ensured that the second through hole 21 can rotate along with the valve stem when the valve stem rotates. In this embodiment, the shape of second through-hole 21 is the rectangle, is applicable to the situation that the valve rod cross-section is the rectangle, guarantees that the valve rod can drive rotary part 2 and rotate.

First through-hole 11 and rotating part 2 are circular, and in rotating part 2 embedded first through-hole 11, rotating part 2's periphery passed through connecting

strip

3 and 11 inner wall connection of first through-hole. This arrangement allows the rotating part 2 and the stationary part 1 to be in the same plane, and relative rotation of the two parts tends to break the connecting strip 3 more easily. When the fixed part 1 and the rotating part 2 need to achieve higher structural strength or be applicable to special places, the fixed part 1 and the rotating part 2 can be made of metal materials, and the connecting strip 3 can be a welding part formed by spot welding between the fixed part 1 and the rotating part 2; fixed part 1 and rotating part 2 also can adopt plastics, rubber material, and connecting strip 3 adopts plastics preparation to form this moment, is convenient for tear and the cost is lower. Above-mentioned mode can guarantee to be connected the fastening between fixed part 1 and the rotating part 2, can guarantee again that when relative rotation between fixed part 1 and the rotating part 2, connecting strip 3 can be destroyed.

The fixed part 1 or the rotating part 2 can be provided with an on or off identification character corresponding to the normally open or normally closed state of the valve, so that the valve is in the normal open or normally closed state, and production danger caused by misoperation of workers is prevented. In daily use, the fixed part 1 or the rotating part 2 can be set to be different colors, and the opening and closing states of the valve can be indicated through the colors, so that a field operator can conveniently check whether the valve is in a normal use state or not.

The utility model provides a valve normally opens or affirmation protection device of normally closed state through being connected between first connecting band 4 and the second connecting band 5, with the locking of fixed part 1 on the valve rod, rotating part 2 is connected fixedly through connecting strip 3 and fixed part 1, the second through-hole 21 and the valve rod outside laminating that set up on the rotating part 2 play the effect of locking the valve rod, guarantee can not influence normal technological parameter because of the operation of false switch valve, cause danger even. After the interlocking protection device is installed, the opening degree of the valve cannot be changed without damaging the device, so that a series of dangers caused by the change of the opening and closing states of the valve due to misoperation of staff or the fact that the problems are not found in time after the misoperation and the like are avoided; meanwhile, the emergency operation of the valve under emergency can be guaranteed by the device, namely the rotary valve rod drives the second through hole 21 and the rotary part 2 to rotate along with the valve rod, the locking of the valve is released by damaging the connecting strip 3, and the safety risk of the valve caused by incapability of operation is avoided.

Example 2:

as shown in fig. 3, the difference from the embodiment 1 is that a worm is provided on the first connecting belt 4, a through eye button is provided on the second connecting belt 5, and the worm and the through eye button are connected in a matching manner to form a throat hoop structure. The hose clamp structure can adjust the locking degree according to the size of the valve, is convenient to fix on valves of different models, can be detached after the worm and the eye button are locked, is convenient to recycle, and saves the cost.

Example 3:

as shown in fig. 4, the difference from embodiment 1 is that the shape of the second through hole 21 is an oval shape, which is suitable for a valve with an oval cross section of the valve rod, and it is ensured that the interlocking protection device can lock and fix the valve rod, and the rotary valve rod can drive the rotary part 2 to rotate, so that the connecting strip 3 can be destroyed in an emergency state, and the valve can be normally opened and closed. Similarly, the second through hole 21 may have other non-circular shapes, as long as the second through hole 21 can rotate with the valve rod.

The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides an interlock protection device about valve normally open normally closed state which characterized in that: the connecting device comprises a fixing part (1), a rotating part (2) and a connecting strip (3), wherein the fixing part (1) is connected with the rotating part (2) through the connecting strip (3), one side of the fixing part (1) is provided with at least one first connecting belt (4), the other side of the fixing part (1) is provided with at least one second connecting belt (5), the first connecting belt (4) and the second connecting belt (5) can be connected, so that the fixing part (1), the first connecting belt (4) and the second connecting belt (5) are connected to form an annular structure, a first through hole (11) is formed in the fixing part (1), a second through hole (21) is formed in the rotating part (2), a valve rod can penetrate through the first through hole (11) and the second through hole (21), when the valve rod is rotated, the second through hole (21) rotates along with the valve rod, and the rotating part (2) and the fixing part (1) rotate relatively, breaking the connecting strip (3).

2. The interlock protection device for the normally open and normally closed states of the valve according to claim 1, wherein: the novel binding belt is characterized in that a buckle is arranged on the first connecting belt (4), transverse teeth are arranged on the second connecting belt (5), and the buckle and the transverse teeth are connected in a matched mode to form a binding belt structure.

3. The interlock protection device for the normally open and normally closed states of the valve according to claim 1, wherein: the first connecting belt (4) is provided with a worm, the second connecting belt (5) is provided with a through eye buckle, and the worm and the through eye buckle are connected in a matched mode to form a throat hoop structure.

4. The interlock protection device for the normally open and normally closed states of the valve according to claim 1, wherein: the shape of the second through hole (21) is the same as the cross section shape of the valve rod, and the periphery of the valve rod is attached to the inner wall of the second through hole (21).

5. The interlock protection device for the normally open and normally closed states of the valve according to claim 1, wherein: be equipped with two first connecting bands (4) and two second connecting bands (5) on fixed part (1), be equipped with recess (12) on fixed part (1), recess (12) correspond with bolt (7) position on the valve.

6. The interlock protection device for the normally open and normally closed states of the valve according to claim 1, wherein: the first through hole (11) with rotating part (2) are circular, rotating part (2) imbed in first through hole (11), the periphery of rotating part (2) passes through connecting strip (3) with the interior wall connection of first through hole (11), the shape of second through hole (21) is rectangle or oval.

7. The interlock protection device for the normally open and normally closed states of the valve according to claim 1, wherein: the fixed part (1) or the rotating part (2) is provided with an on or off mark character, and the on or off mark character corresponds to the normally open or normally closed state of the valve.