CN115325253A

CN115325253A - Gate valve anti-opening lock

Info

Publication number: CN115325253A
Application number: CN202110512968.2A
Authority: CN
Inventors: 王世谦; 齐玉梅; 张伟; 冯峰; 王真; 白玉; 韩胜华; 季进; 赵常; 王志玲
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2022-11-11

Abstract

The application relates to a gate valve anti-opening and closing lock, and belongs to the technical field of oil and gas exploitation. The gate valve anti-opening and closing lock comprises an anti-theft rod, a lock plate, a lock block and a boosting block, wherein: the theftproof pole has U type rod-shaped structure, the middle part position department of theftproof pole is provided with the snap ring, the both ends of theftproof pole all are provided with the external screw thread, the both ends of jam plate are provided with a lock section of thick bamboo respectively, the both ends of jam plate still are provided with first through-hole respectively, the locking piece has the tubular structure, the internal thread boosting piece that is provided with the external screw thread looks adaptation with the both ends of theftproof pole on the inner wall of locking piece includes cylinder section and prismatic section, the external diameter of cylinder section is less than the internal diameter of a lock section of thick bamboo, the circumscribed circle diameter of prism section is less than the internal diameter of a lock section of thick bamboo, be provided with circular recess on the terminal surface of the cylinder section of boosting piece, be provided with the latch of mutually supporting on relative two faces between cylinder section and the locking piece. Adopt this application, can pin the gate valve, thereby effectively prevented other people from opening by mistake or open the production accident or the accident of stealing that causes on purpose.

Description

Gate valve anti-opening lock

Technical Field

The application relates to the technical field of oil and gas exploitation, in particular to a gate valve anti-opening and closing lock.

Background

In the process of oil field development, no matter whether the oil-water well is produced or transported out, a gate valve is used, and a worker can open or close the gate valve by rotating a hand wheel of the gate valve. Some gate valves are located in the field and are easily opened or closed by mistake by people, so that serious production accidents are caused, and some gate valves located at the end of the pipeline can be easily opened by people to steal petroleum in the pipeline, so that certain loss is caused.

At present, the gate valve is locked by a chain in a common method on site, but the lockset is easy to damage and has poor effect.

Disclosure of Invention

The embodiment of the application provides a gate valve prevents switch lock can solve the technical problem who exists among the correlation technique, gate valve prevents switch lock's technical scheme as follows:

the embodiment of the application provides a switch lock is prevented to gate valve, switch lock is prevented to gate valve includes theftproof pole 1, jam plate 2, locking piece 3 and boosting piece 4, wherein:

the anti-theft rod 1 is of a U-shaped rod structure, a clamping ring 11 is arranged in the middle of the anti-theft rod 1, the inner diameter of the clamping ring 11 is larger than the outer diameter of a screw rod of the gate valve 5, external threads are arranged at two ends of the anti-theft rod 1, the first end of each external thread is located on the end face of the anti-theft rod 1, an annular bulge 12 is arranged at the second end of each external thread on the anti-theft rod 1, and the sum of the distance between the axes of the two ends of the anti-theft rod 1 and the diameter of the annular bulge 12 is smaller than the inner diameter of an annular handle of a hand wheel of the gate valve 5;

the two ends of the lock plate 2 are respectively provided with a lock cylinder 21, the axis of the lock cylinder 21 is perpendicular to the surface of the position of the lock plate 2 where the lock cylinder 21 is located, the two ends of the lock plate 2 are also respectively provided with a first through hole 22, the first through holes 22 are coaxial with the lock cylinder 21, the distance between the centers of circles of the two first through holes 22 is equal to the distance between the axes of the two ends of the anti-theft rod 1, and the diameter of each first through hole 22 is larger than the outer diameter of the two ends of the anti-theft rod 1 and smaller than the outer diameter of the annular bulge 12;

the locking block 3 is of a cylindrical structure, inner threads matched with the outer threads at the two ends of the anti-theft rod 1 are arranged on the inner wall of the locking block 3, and the outer diameter of the locking block 3 is smaller than the inner diameter of the locking cylinder 21 and larger than the diameter of the first through hole 22;

the boosting block 4 comprises a cylindrical section 41 and a prism section 42, the outer diameter of the cylindrical section 41 is smaller than the inner diameter of the lock cylinder 21, the diameter of an external circle of the prism section 42 is smaller than the inner diameter of the lock cylinder 21, the sum of the axial length of the lock block and the axial length of the boosting block 4 is larger than the axial length of the lock cylinder 21, a circular groove 43 is arranged on the end face of the cylindrical section 41 of the boosting block 4, the diameter of the circular groove 43 is larger than the outer diameter of two ends of the anti-theft rod 1, the sum of the axial depth of the circular groove 43 and the axial length of the lock block 3 is larger than the axial length of the part of the anti-theft rod 1 provided with the external thread, and mutually matched clamping teeth are arranged on two opposite faces between the cylindrical section 41 and the lock block 3.

In a possible implementation manner, the gate valve anti-opening and closing lock further comprises a screw 6 and a gasket 7, both ends of the anti-theft rod 1 are provided with screw holes 13, the screw holes 13 are matched with the screw 6, and the thread pitch of the screw holes 13 is equal to the thread pitch of the external threads at both ends of the anti-theft rod 1;

an axial second through hole 44 is arranged on the end face of the prismatic section 42 of the boosting block 4, and the diameter of the second through hole 44 is larger than the outer diameter of the screw rod of the screw 6 and smaller than the diameter of the circular groove 43.

In a possible implementation, the screw head of the screw 6 has a prismatic structure, and the shape and the size of the cross section of the screw head of the screw 6 perpendicular to the axial direction of the screw 6 are the same as those of the cross section of the prismatic section 42 perpendicular to the axial direction of the prismatic section 42.

In a possible implementation, the prism section 42 is a hexagonal prism, the screw head of the screw 6 has a hexagonal prism structure, and the length of each side of the cross section of the screw head of the screw 6 perpendicular to the axial direction of the screw 6 is equal to the length of each side of the cross section of the prism section 42 perpendicular to the axial direction of the prism section 42.

In a possible realization, the central position of the locking plate 2 has an arc-shaped structure, the shape of which matches the shape of the body of the gate valve 5.

In a possible implementation, the outer diameter of the locking piece 3 is equal to the outer diameter of the cylindrical section 41.

In one possible implementation, the diameter of the circumscribed circle of the prism section 42 is equal to the outer diameter of the cylindrical section 41.

In a possible realisation, the outer diameter of the locking piece 3 is equal to the outer diameter of the annular projection 12.

In a possible implementation manner, the latch provided on the lock block 3 includes a plurality of protrusions evenly distributed around the axis of the lock block 3, and the latch provided on the cylindrical section 41 includes a plurality of protrusions evenly distributed around the axis of the cylindrical section 41.

In one possible implementation, the difference between the outer diameter of the lock block 3 and the inner diameter of the lock cylinder 21 is 2mm.

The technical scheme provided by the embodiment of the application at least comprises the following beneficial effects:

the embodiment of the application provides a gate valve anti-opening lock can lock the hand wheel of gate valve through theftproof pole, jam plate and locking piece for the rotatory restriction that forms of the hand wheel of the gate valve after being locked, thereby make the gate valve prevent the effect of switch lock by the gate valve locked down, thereby played and prevented that the people from opening by mistake or deliberately open the production accident or the theft accident that cause.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a gate valve anti-opening and closing lock according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a gate valve anti-opening and closing lock according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a theft-proof lever according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a lock plate according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a lock block according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a boost block according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a boost block according to an embodiment of the present application;

FIG. 8 is a schematic sectional view of a gate valve anti-opening lock installed according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a gate valve anti-opening and closing lock according to an embodiment of the present application;

FIG. 10 is a schematic view of a structure of a security bar according to an embodiment of the present application;

fig. 11 is a schematic sectional view illustrating a gate valve open/close lock according to an embodiment of the present application.

Description of the figures

1. An antitheft lever;

11. a snap ring; 12. an annular projection; 13. a screw hole;

2. a locking plate;

21. a lock cylinder; 22. a first through hole;

3. a locking block;

4. a boosting block;

41. a cylindrical section; 42. a prismatic section; 43. a circular groove; 44. a second through hole;

5. a gate valve;

6. a screw;

7. and (7) a gasket.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, the following detailed description of the embodiments of the present application will be made with reference to the accompanying drawings.

The embodiment of the application provides a gate valve anti-opening and closing lock, and as shown in fig. 1 and 2, the gate valve anti-opening and closing lock comprises an anti-theft rod 1, a locking plate 2, a locking block 3 and a boosting block 4.

The opening and closing member of the gate valve 5 is a gate plate, the movement direction of the gate plate is perpendicular to the fluid direction, for example, if a gate valve is arranged on the oil and gas outward conveying pipeline, the openings at the two ends of the gate valve body need to be respectively connected with the two oil and gas outward conveying pipelines, and when the gate valve 5 is closed, the gate plate blocks between the two opposite openings of the two oil and gas outward conveying pipelines, so that the two oil and gas outward conveying pipelines cannot be communicated. When the gate valve 5 needs to be opened, the gate plate needs to be retracted, so that the two connected oil and gas external transmission pipelines are communicated. When the gate valve 5 needs to be closed, the gate plate needs to be released, so that the gate plate blocks a passage between the two oil and gas delivery pipelines.

The gate valve 5 is provided with a hand wheel and a screw rod, the hand wheel is in threaded connection with the screw rod, the screw rod is fixedly connected with the gate plate of the gate valve 5, the axis of the screw rod is perpendicular to the axis of the pipeline communicated with the gate valve 5, the axis of the valve plate is parallel to the axis of the pipeline communicated with the gate valve 5, when the hand wheel is rotated, the hand wheel and the screw rod move relatively, the screw rod moves in the axial direction, the gate plate is driven to move in the direction perpendicular to the axis of the pipeline connected with the gate valve 5, and therefore opening and closing of the gate valve 5 are achieved. Because the switch and the closure of the gate valve 5 are driven to move in the direction of the axis by the rotation of the screw rod, so as to drive the valve plate to move, the switch or the closure of the gate valve 5 needs to rotate the hand wheel for more turns, for example, 20 turns.

When the gate valve 5 needs to be opened, the hand wheel arranged on the gate valve 5 is rotated along one direction, the screw rod can move towards the direction far away from the pipeline connected with the gate valve 5, at the moment, the flashboard connected with the screw rod also moves along with the screw rod, and the flashboard is not blocked between the two pipelines connected with the gate valve 5 any longer, so that the two pipelines can be communicated with each other.

When the gate valve 5 needs to be closed, the hand wheel arranged on the gate valve 5 can be rotated along the other direction, the screw rod can move towards the direction close to the pipeline connected with the gate valve 5, at the moment, the flashboard connected with the screw rod also moves along with the screw rod, and a passage between the two pipelines connected with the gate valve 5 is blocked, so that the two pipelines are not communicated.

Theftproof pole 1 has U type rod-shaped structure, the middle part position department of theftproof pole 1 is provided with snap ring 11, the internal diameter of snap ring 11 is greater than the external diameter of the screw rod of gate valve 5, the both ends of theftproof pole 1 all are provided with the external screw thread, the first end of external screw thread is located the terminal surface of theftproof pole 1, the second end department of external screw thread is provided with annular arch 12 on theftproof pole 1, distance between the axis at the both ends of theftproof pole 1 and the diameter sum of annular arch 12 are less than the internal diameter of the annular handle of the hand wheel of gate valve 5.

In practice, as shown in fig. 3, the antitheft lever 1 has a U-shaped lever structure, and includes two side levers with parallel axes and a middle lever connecting the two side levers, the middle position of the antitheft lever 1 is the central position of the middle lever, a snap ring 11 is arranged at the central position of the middle lever, and the inner diameter of the snap ring 11 is greater than the outer diameter of the screw of the gate valve 5, so that the snap ring 11 can be sleeved on the screw of the gate valve 5.

And the theftproof pole 1 has U type rod-shaped structure, when the snap ring 11 suit is on the screw rod of gate valve 5, because the distance between the axis at the both ends of theftproof pole 1 adds twice of the radius of annular protrusion 12 (is equal to the diameter of annular protrusion 12), is the biggest width between two side levers of theftproof pole 1, when the biggest width between two side levers of theftproof pole 1 is less than the internal diameter of the annular handle of the hand wheel of gate valve 5, the parallel side lever of two axes of theftproof pole 1 can pass the space within the annular handle of the hand wheel of gate valve 5 for the tip of theftproof pole 1 reaches the one side of the body of gate valve 5 that is far away from the hand wheel.

The end of the side lever that two axes of theftproof pole 1 are parallel to each other is two tip of theftproof pole 1 promptly, and two tip of theftproof pole 1 all are provided with the external screw thread. As for one of the ends of the antitheft lever 1, a first end of the external thread is located on the end face of the end of the side lever of the antitheft lever 1, and a second end of the external thread is provided with an annular protrusion 12, that is, an annular protrusion 12 is respectively provided on the two side levers of the antitheft lever 1, the annular protrusion 12 is at a certain distance from the end face of the antitheft lever 1, and the external thread is arranged between the end face of the antitheft lever 1 and the annular protrusion 12.

Optionally, the outer diameters of the antitheft rod 1 at the two ends of the annular protrusion 12 (that is, the outer diameter of the side rod of the antitheft rod 1 and the outer diameter of the position where the external thread is arranged at the end of the antitheft rod 1) may be equal or unequal, and this embodiment does not limit this.

The two ends of the locking plate 2 are respectively provided with a locking cylinder 21, the axis of the locking cylinder 21 is perpendicular to the surface of the position of the locking plate 2 where the locking cylinder 21 is located, the two ends of the locking plate 2 are also respectively provided with a first through hole 22, the first through holes 22 are coaxial with the locking cylinder 21, the distance between the centers of circles of the two first through holes 22 is equal to the distance between the axes of the two ends of the anti-theft rod 1, and the diameter of each first through hole 22 is larger than the outer diameters of the two ends of the anti-theft rod 1 and smaller than the outer diameter of the annular protrusion 12.

In implementation, the lock plate 2 may be a rectangular plate, the length of the rectangular plate is greater than the distance between the axes of the two side bars of the antitheft rod 1, two ends of the lock plate 2 are respectively provided with a lock cylinder 21, and the axis of the lock cylinder 21 is perpendicular to the surface of the lock plate 2 where the lock cylinder is located. At the both ends of jam plate 2, corresponding to a lock section of thick bamboo 21, still be provided with first through-hole 22 respectively, first through-hole 22 and the coaxial setting of a lock section of thick bamboo 21, distance between the centre of a circle of two first through-holes 22 equals with the axis at the both ends of theftproof pole 1 (be the axis of two side levers of theftproof pole 1) between the distance, and the diameter of first through-hole 22 is greater than the external diameter at the both ends of theftproof pole 1 (be the external diameter that is provided with external screw thread department of theftproof pole 1 tip promptly), the diameter of first through-hole 22 still is less than the external diameter of annular arch 12.

The staff can overlap two first through-holes 22 respectively on the both ends of theftproof pole 1 to make the jam plate 2 suit on theftproof pole 1, theftproof pole 1 and jam plate 2 suit together on gate valve 5. And the annular bulge 12 that the both ends of theftproof pole 1 set up can block jam plate 2 for first through-hole 22 can only the suit on the position that is provided with the external screw thread of theftproof pole 1.

Optionally, the central position of the locking plate 2 has an arc-shaped structure, and the shape of the arc-shaped plate is matched with the shape of the body of the gate valve 5.

In the implementation, as shown in fig. 4, the central point of locking plate 2 puts the department and can be provided with the radian, and the position that is provided with a lock section of thick bamboo 21 of radian both sides is still dull and stereotyped, and central point department of putting is provided with the radian and can makes locking plate 2 can with the laminating more of the body of gate valve 5, more does benefit to the locking of the gate valve anti-opening and closing lock that this application embodiment provided.

The locking piece 3 has a cylindrical structure, an internal thread matched with the external threads at the two ends of the anti-theft rod 1 is arranged on the inner wall of the locking piece 3, and the outer diameter of the locking piece 3 is smaller than the inner diameter of the locking cylinder 21 and larger than the diameter of the first through hole 22.

In practice, as shown in fig. 5, the locking piece 3 is cylindrical, the wall thickness has a certain size, an internal thread is provided on the inner wall of the locking piece 3, the locking piece 3 can be screwed with the part with the external thread at the end of the antitheft rod 1 by means of the internal thread, so that the locking piece 3 is screwed at the end of the antitheft rod 1, and the relative position of the locking plate 2 clamped between the locking piece 3 and the antitheft rod 1 can be fixed.

The outer diameter of the lock block 3 is smaller than the inner diameter of the lock cylinder 21 so that the lock block 3 can be put into the lock cylinder 21. Moreover, the outer diameter of the locking piece 3 is larger than the diameter of the first through hole 22 on the locking plate 2, and after the locking piece 3 is put into the locking cylinder 21 from the opening end of the locking cylinder 21, the locking piece 3 cannot fall out of the first through hole 22 at the other end of the locking cylinder 21.

In practice, as shown in fig. 6 and 7, the boosting block 4 may be divided into two parts in shape, one part is a cylindrical section 41 in a cylindrical shape, the other part is a prism section 42 in a prism shape, and the cylindrical section 41 and the prism section 42 are integrated, so that two end faces of the boosting block 4 correspond to one end face of the cylindrical section 41 and one end face of the prism section 42.

Firstly, because the boosting block 4 is used for assisting the fixed connection between the lock block 3 and the anti-theft rod 1, when the anti-theft rod is used, a worker needs to insert the boosting block 4 into the lock cylinder 21 from the opening of the lock cylinder 21, and therefore, the maximum outer diameter of the boosting block 4 is smaller than the inner diameter of the lock cylinder 21, that is, the outer diameter of the cylindrical section 41 of the boosting block 4 is smaller than the inner diameter of the lock cylinder 21, and the diameter of the circumscribed circle of the prismatic section 42 of the boosting block 4 is smaller than the inner diameter of the lock cylinder 21. Optionally, the difference between the outer diameter of the lock block 3 and the inner diameter of the lock cylinder 21 may be 2mm, or may be other reasonable sizes, and the difference may be set according to specific situations, which is not limited in this embodiment.

Next, as for the cylindrical section 41 of the booster 4, a circular groove 43 is provided on the end surface of the cylindrical section 41 for preventing the end portion of the antitheft lever 1 from obstructing the insertion of the booster 4 when the worker inserts the booster 4 into the lock cylinder 21, and therefore, the diameter of the circular groove 43 is larger than the outer diameter of the end portion of the antitheft lever 1. It can be understood that, as long as the sum of the axial depth of the circular groove 43 and the axial length of the locking piece 3 is greater than the axial length of the portion of the anti-theft rod 1 provided with the external thread, the axial depth of the circular groove 43 may be greater than the axial length of the cylindrical section 41, may be equal to the axial length of the cylindrical section 41, or may be smaller than the axial length of the cylindrical section 41, that is, the groove bottom of the circular groove 43 may be located inside the cylindrical section 42, may be located at a position adjacent to the cylindrical section 41 and the cylindrical section 42, or may be located inside the cylindrical section 41, and may be set accordingly according to specific situations, which is not limited in this embodiment.

Mutually matched latch is arranged on two opposite surfaces between the cylindrical section 41 and the locking block 3, when two opposite surfaces of the cylindrical section 41 and the locking block 3 are mutually contacted, the latch on the two surfaces can be mutually clamped, and when any one of the cylindrical section 41 and the locking block 3 rotates around the self axial direction, the other latch can rotate along with the same direction through the clamped latch.

Alternatively, the arrangement of the shape of the latch between the cylindrical section 41 and the locking piece 3 may be variously possible, one of which is as follows:

the latch that sets up on the locking piece 3 includes a plurality of archs around the axis evenly distributed of locking piece 3, and the latch that sets up on the cylinder section 41 includes a plurality of archs around the axis evenly distributed of cylinder section 41.

In an implementation, the latch disposed between the locking block 3 and the cylindrical section 41 may be a plurality of protrusions disposed around respective axes, and the shape of the latch may be a rectangular tooth or a triangular tooth, which is not limited in this embodiment.

Alternatively, the outer diameter of the locking piece 3 may be equal to the outer diameter of the cylindrical section 41. The diameter of the circumscribed circle of the prism section 42 may be equal to the outer diameter of the cylindrical section 41. The outer diameter of the locking piece 3 may be equal to the outer diameter of the annular protrusion 12.

When installing the gate valve anti-opening and closing lock that this application embodiment provided, can pass two different holes of the hand wheel of gate valve 5 respectively with the two side levers of theftproof pole 1 earlier, the side lever of every theftproof pole 1 passes a different hole for two side levers are located the both sides of the body of gate valve 5, then overlap the snap ring 11 that sets up on the intermediate lever of theftproof pole 1 on the screw rod of gate valve 5, as shown in fig. 1.

Then, the lock plate 2 may be fitted around the antitheft lever 1 in a direction in which the first through hole 22 is close to the body of the gate valve 5 and the open end of the lock cylinder 21 is far from the body of the gate valve 5. As shown in fig. 8, fig. 8 is a schematic cross-sectional view of a gate valve anti-opening/closing lock, the locking plate 2 is sleeved on the portions of the two ends of the anti-theft rod 1, which are provided with the external threads, through the first through hole 22, and since the second end of the external threads is provided with the annular protrusion 12 and the diameter of the first through hole 22 is smaller than the outer diameter of the annular protrusion 12, the locking plate 2 is sleeved on the portions of the two ends of the anti-theft rod 1, which are provided with the external threads, and cannot move towards the direction of the middle rod. At this time, the portions of both ends of the antitheft lever 1 provided with the external threads are mostly located in the lock cylinder 21.

Then, the worker can put the lock block 3 into the lock cylinder 21 with the end provided with the latch facing the opening end of the lock cylinder 21 and the end not provided with the latch facing the bottom of the lock cylinder 21, and screw-connect the lock block 3 with the portions provided with the external threads at the two ends of the anti-theft rod 1, at this time, because the length of the lock cylinder 21 is greater than the length of the lock block 3, the worker can not directly screw the lock block 3 into the bottom of the lock cylinder 21 by hand (i.e. one end face of the lock block 3 is in contact with the lock plate 2), so, after screwing the lock block 3 into a part of the lock cylinder 21, the booster block 4 is put into the lock cylinder 21 with the cylindrical section 41 facing the inside of the lock cylinder 21 and the prismatic section 42 facing the outside of the lock cylinder 21, and the position of the booster block 4 is adjusted, so that the latch arranged on the end face of the cylindrical section 41 of the booster block 4 is mutually fastened with the latch arranged on the end face of the lock block 3.

After the teeth between the boosting block 4 and the locking block 3 are engaged with each other, the boosting block 4 can be rotated while the boosting block 4 is pushed in the axial direction of the boosting block 4 toward the locking block 3, and the prismatic section 42 of the boosting block 4 helps people to rotate the boosting block 4.

Because the staff always pushes the boosting block 4 towards the direction of the locking block 3, and the locking block 3 can not move axially under the condition of no rotation because of the threaded connection with the external thread part at the end part of the anti-theft rod 1, the axial displacement of the locking block 3 can not be influenced by pushing the boosting block 4. But push boosting piece 4, can make and push each other between boosting piece 4 and the locking piece 3 to make the latch between boosting piece 4 and the locking piece 3 can not take place relative dislocation, the latch on two terminal surfaces is in the block state always. Therefore, when the boosting block 4 is rotated in the process of pushing the boosting block 4 toward the lock block 3, the lock block 3 rotates together with the boosting block 4 under the action of the latch, so that the lock block 3 is screwed into the bottom of the lock cylinder 21, i.e., the end surface of the lock block 3, which is not provided with the latch, is in contact with the lock plate 2.

After the lock block 3 is driven to rotate by rotating the boosting block 4 so as to screw the lock block 3 into the bottom of the lock cylinder 21, the boosting block 4 can be taken out of the lock cylinder 21. At this time, the locking piece 3 is screwed and locked with the antitheft rod 1, so that the antitheft rod 1 and the locking plate 2 lock the gate valve 5. When someone rotates the hand wheel of the gate valve 5 under the condition that the anti-theft rod 1 and the locking plate 2 are locked, the hand wheel cannot rotate for one circle due to the locking of the anti-theft rod 1 and the locking plate 2, the opening and closing of the gate valve 5 are realized, the hand wheel needs to be rotated for multiple circles, and therefore the gate valve 5 cannot be opened. Moreover, the locking block 3 is positioned in the lock cylinder 21, and the locking block 3 is extremely difficult to screw without an auxiliary tool (the boosting block 4), so that the situation that others open by mistake or open by intention is prevented.

When the gate valve anti-opening and closing lock of the embodiment of the application is disassembled, the boosting block 4 needs to be placed into the lock cylinder 21 from the cylinder section 41 to the inside of the lock cylinder 21 and from the prism section 42 to the outside of the lock cylinder 21, then the position of the boosting block 4 is adjusted, so that the clamping teeth arranged on the end face of the cylinder section 41 of the boosting block 4 are clamped with the clamping teeth arranged on the end face of the lock block 3, then the boosting block 4 is rotated while being pushed towards the direction of the lock block 3, so that the boosting block 4 drives the lock block 3 to rotate, the lock block 3 is screwed out of the lock cylinder, the lock block 3 is separated from the external thread part at the end part of the anti-theft rod 1, at the moment, the lock plate 2 can be taken down from the anti-theft rod 1, and then the anti-theft rod 1 is taken down from the hand wheel of the gate valve 5, and therefore the disassembly of the gate valve anti-opening and closing lock is realized.

The embodiment of the application also provides a switch lock is prevented to gate valve, as shown in fig. 9, this switch lock is prevented to gate valve still includes screw 6 and gasket 7 except including above-mentioned each part, and the both ends of anti-theft rod 1 all are provided with screw 13,

screw

13 and 6 looks adaptations of screw, and the pitch of screw 13 equals with the pitch of the external screw thread at anti-theft rod 1 both ends.

An axial second through hole 44 is arranged on the end face of the prism section 42 of the boosting block 4, and the diameter of the second through hole 44 is larger than the outer diameter of the screw rod of the screw 6 and smaller than the diameter of the circular groove 43.

In practice, as shown in fig. 10, the end surfaces of the two ends of the anti-theft rod 1 are respectively provided with a screw hole 13, the screw holes 13 are matched with the screws 6, and the screws 6 can be connected with the screw holes 13 in a threaded manner. The end face of the prism section 42 of the boosting block 4 is provided with an axial second through hole 44, and the diameter of the second through hole 44 is larger than the outer diameter of the screw rod of the screw 6 and smaller than the diameter of the circular groove 43, so that when the screw 6 is installed, the screw 6 can pass through the boosting block 4 from the second through hole 44, and is in threaded connection with the screw hole 13 on the anti-theft rod 1.

The gate valve anti-opening and anti-closing lock can further comprise a gasket 7, the gasket 7 can protect the screw 6 and the boosting block 4, and friction force between the screw 6 and the boosting block 4 can be enhanced.

The pitch of screw 13 equals the pitch of the external screw thread at the both ends of anti-theft rod 1, like this, when screw 6 and screw 13 threaded connection, locking piece 3 and the external screw thread threaded connection of the tip at the both ends of anti-theft rod 1, the axial displacement equals when screw 6 rotates a week with the rotatory one week of locking piece 3 in the axial displacement, thereby makes staff can rotate screw 6 and locking piece 3 simultaneously, and can not change relative position between the two.

Alternatively, the screw head of the screw 6 has a prismatic structure, and the shape and size of the cross section of the screw head of the screw 6 perpendicular to the axial direction of the screw 6 are the same as those of the cross section of the prismatic section 42 perpendicular to the axial direction of the prismatic section 42.

In practice, the screw head of the screw 6 may be arranged in a prismatic structure, which may facilitate the screwing of the screw 6 by a worker.

The cross section of the screw head of the screw 6, which is vertical to the axial direction of the screw 6, is a regular polygon, the cross section of the prism section 42, which is vertical to the axial direction of the prism section 42, is also a regular polygon, the number of the sides of the regular polygon cross section of the screw head is equal to the number of the sides of the regular polygon cross section of the prism section 42, and the length of each side of the regular polygon cross section of the screw head is equal to the length of each side of the regular polygon cross section of the prism section 42. In this way, the screw 6 and the prism section 42 can be screwed simultaneously by the worker, and the screwing is simple and convenient.

Alternatively, the prismatic structures of the screw head of the screw 6 and the prismatic section 42 of the boosting block 4 may be provided with hexagonal prisms, and the specific structures may be as follows:

the prism section 42 is a hexagonal prism, the screw head of the screw 6 has a hexagonal prism structure, and the length of each side of the cross section of the screw head of the screw 6, which is perpendicular to the axial direction of the screw 6, is equal to the length of each side of the cross section of the prism section 42, which is perpendicular to the axial direction of the prism section 42.

When the gate valve open/close preventing lock provided with the screw hole 13, the screw 6 and the gasket 7 is installed, as shown in fig. 11, fig. 11 is a schematic sectional view of the gate valve open/close preventing lock installed, and the operation process of installing the burglar proof bar 1 and the locking plate 2 is the same as the operation process of installing the gate valve open/close preventing lock not provided with the screw hole 13, the screw 6 and the gasket 7. Firstly, two side rods of the antitheft rod 1 penetrate through two different holes of a hand wheel of the gate valve 5 respectively, so that the two side rods are positioned on two sides of a body of the gate valve 5, then a clamping ring 11 arranged on a middle rod of the antitheft rod 1 is sleeved on a screw rod of the gate valve 5, and then a locking plate 2 is sleeved on the antitheft rod 1 in a way that a first through hole 22 is close to the body of the gate valve 5 and the direction that the opening end of a locking cylinder 21 is far away from the body of the gate valve 5.

Then, the worker can place the lock block 3 into the lock cylinder 21 with the end provided with the latch facing the opening end of the lock cylinder 21 and the end not provided with the latch facing the bottom of the lock cylinder 21, then screw the lock block 3, after screwing the lock block 3 into a part of the lock cylinder 21, place the boosting block 4 into the lock cylinder 21 with the cylindrical section 41 facing the inside of the lock cylinder 21 and the prismatic section 42 facing the outside of the lock cylinder 21, and adjust the position of the boosting block 4 so that the latch arranged on the end face of the cylindrical section 41 of the boosting block 4 is mutually engaged with the latch arranged on the end face of the lock block 3.

Then, the gasket 7 is sleeved at the screw rod part of the screw 6, and the screw 6 is screwed into the screw hole 13 arranged at the end part of the anti-theft rod 1 until the screw head of the screw 6 and the end surface of the prism section 42 of the boosting block 4 are mutually extruded, and the screwing of the screw 6 is stopped. At this time, since the locking block 3 is not screwed, the locking block 3 has no displacement change in the axial direction, and the boosting block 4 and the screw 6 are pressed against each other, and under the action of the screw 6, the boosting block 4 and the locking block 3 are pressed against each other and tightly attached together. If the screw 6 and the prism section 42 part of the boosting block 4 are rotated simultaneously, the boosting block 4 can drive the locking block 3 to rotate through the latch which is clamped together, so that the locking block 3 moves towards the bottom of the lock cylinder 21, and because the thread pitch of the screw thread of the screw hole 13 is the same as the thread pitch of the external thread of the end part of the anti-theft rod 1, when the locking block 3 moves towards the bottom of the lock cylinder 21 for a certain distance, the screw 6 also moves towards the bottom of the lock cylinder 21 for the screw 6 always pushes the boosting block 4 towards the locking block 3, so that when the locking block 3 moves towards the bottom of the lock cylinder 21, the latch between the boosting block 4 and the locking block 3 is always clamped, and the boosting block 4 can always drive the locking block to rotate. Therefore, the screw 6 and the booster block 4 are simultaneously rotated until the lock block 3 is screwed into the bottom of the lock cylinder 21, i.e., the end surface of the lock block 3 where no latch is provided is brought into contact with the lock plate 2.

After the locking block 3 is driven to rotate by rotating the screw 6 and the boosting block 4 so as to screw the locking block 3 into the bottom of the lock cylinder 21, the screw 6, the gasket 7 and the boosting block 4 can be taken out of the lock cylinder 21. At this time, the locking piece 3 is screwed and locked with the antitheft rod 1, so that the antitheft rod 1 and the locking plate 2 lock the gate valve 5. When someone rotates the hand wheel of the gate valve 5 under the condition that the anti-theft rod 1 and the locking plate 2 are locked, the hand wheel cannot complete the rotation of one circle due to the locking of the anti-theft rod 1 and the locking plate 2, and therefore the gate valve 5 cannot be opened. Moreover, the locking block 3 is positioned in the lock cylinder 21, and the locking block 3 is extremely difficult to screw without an auxiliary tool (the boosting block 4), so that the situation that others open by mistake or open by intention is prevented.

When the gate valve anti-opening and closing lock provided with the screw hole 13, the screw 6 and the gasket 7 is disassembled, the boosting block 4 needs to be put into the lock cylinder 21 in a direction that the cylindrical section 41 faces the inside of the lock cylinder 21 and the prismatic section 42 faces the outside of the lock cylinder 21, and then the position of the boosting block 4 needs to be adjusted, so that the latch arranged on the end face of the cylindrical section 41 of the boosting block 4 is mutually clamped with the latch arranged on the end face of the lock block 3. The gasket 7 is sleeved at the screw rod position of the screw 6, the screw rod 6 is in threaded connection with the screw hole 13, the screw rod 6 is rotated until the screw rod 6 and the boosting block 4 are mutually extruded, then the boosting block 4 and the screw rod 6 are simultaneously rotated, so that the boosting block 4 drives the locking block 3 to rotate, the locking block 3 is screwed out of the locking barrel, the locking block 3 is separated from the external thread position of the end part of the anti-theft rod 1, at the moment, the locking plate 2 can be taken down from the anti-theft rod 1, then the anti-theft rod 1 is taken down from the hand wheel position of the gate valve 5, and therefore the gate valve anti-opening and closing lock is disassembled.

Set up screw 13 and screw rod 6, can be so that boosting piece 4 and locking piece 3 closely laminate each other always, when the installation with dismantle the gate valve and prevent the switch lock, can not need the staff to promote boosting piece 4 towards the direction of locking piece 3 always, saved the manpower, it is more simple convenient to use.

The above description is intended only to illustrate the alternative embodiments of the present application, and should not be construed as limiting the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The utility model provides a switch lock is prevented to gate valve, its characterized in that, switch lock is prevented to gate valve includes theftproof pole (1), jam plate (2), locking piece (3) and boosting piece (4), wherein:

the anti-theft rod (1) is of a U-shaped rod structure, a clamping ring (11) is arranged in the middle of the anti-theft rod (1), the inner diameter of the clamping ring (11) is larger than the outer diameter of a screw rod of the gate valve (5), external threads are arranged at two ends of the anti-theft rod (1), the first end of each external thread is located on the end face of the anti-theft rod (1), an annular bulge (12) is arranged at the second end of each external thread on the anti-theft rod (1), and the sum of the distance between the axes at the two ends of the anti-theft rod (1) and the diameter of each annular bulge (12) is smaller than the inner diameter of an annular handle of a hand wheel of the gate valve (5);

the anti-theft rod is characterized in that two ends of the locking plate (2) are respectively provided with a locking cylinder (21), the axis of the locking cylinder (21) is perpendicular to the surface of the position of the locking plate (2) where the locking cylinder (21) is located, two ends of the locking plate (2) are respectively provided with a first through hole (22), the first through holes (22) are coaxial with the locking cylinder (21), the distance between the centers of circles of the two first through holes (22) is equal to the distance between the axes of two ends of the anti-theft rod (1), and the diameter of each first through hole (22) is larger than the outer diameter of each end of the anti-theft rod (1) and smaller than the outer diameter of the annular bulge (12);

the locking block (3) is of a cylindrical structure, internal threads matched with the external threads at the two ends of the anti-theft rod (1) are arranged on the inner wall of the locking block (3), and the outer diameter of the locking block (3) is smaller than the inner diameter of the locking cylinder (21) and larger than the diameter of the first through hole (22);

the boosting block (4) comprises a cylindrical section (41) and a prismatic section (42), the outer diameter of the cylindrical section (41) is smaller than the inner diameter of the lock cylinder (21), the diameter of an external circle of the prismatic section (42) is smaller than the inner diameter of the lock cylinder (21), the sum of the axial length of the lock block and the axial length of the boosting block (4) is larger than the axial length of the lock cylinder (21), a circular groove (43) is arranged on the end face of the cylindrical section (41) of the boosting block (4), the diameter of the circular groove (43) is larger than the outer diameter of two ends of the anti-theft rod (1), the sum of the axial depth of the circular groove (43) and the axial length of the lock block (3) is larger than the axial length of a part of the anti-theft rod (1) provided with the external thread, and two opposite faces between the cylindrical section (41) and the lock block (3) are provided with mutually matched clamping teeth.

2. The gate valve anti-opening-closing lock according to claim 1, characterized in that the gate valve anti-opening-closing lock further comprises a screw (6) and a gasket (7), both ends of the anti-theft rod (1) are provided with screw holes (13), the screw holes (13) are matched with the screw (6), and the thread pitch of the screw holes (13) is equal to the thread pitch of the external threads at both ends of the anti-theft rod (1);

an axial second through hole (44) is formed in the end face of the prismatic section (42) of the boosting block (4), and the diameter of the second through hole (44) is larger than the outer diameter of a screw rod of the screw (6) and smaller than the diameter of the circular groove (43).

3. The gate valve anti-opening-closing lock according to claim 2, characterized in that the screw head of the screw (6) has a prismatic structure, the shape and the dimensions of the cross section of the screw head of the screw (6) perpendicular to the axial direction of the screw (6) being the same as the shape and the dimensions of the cross section of the prismatic section (42) perpendicular to the axial direction of the prismatic section (42).

4. The gate valve anti-opening and closing lock according to claim 3, characterized in that the prismatic section (42) is hexagonal prism, the screw head of the screw (6) has a hexagonal prism structure, and the length of each side of the cross section of the screw head of the screw (6) perpendicular to the axial direction of the screw (6) is equal to the length of each side of the cross section of the prismatic section (42) perpendicular to the axial direction of the prismatic section (42).

5. Gate valve anti-opening lock according to claim 1, characterized in that the central position of the lock plate (2) has an arc-shaped structure, the shape of the arc-shaped plate matches with the shape of the body of the gate valve (5).

6. Gate valve anti-opening lock according to claim 1, characterized in that the outer diameter of the locking piece (3) is equal to the outer diameter of the cylinder section (41).

7. Gate valve anti-opening lock according to claim 1, characterized in that the diameter of the circumcircle of the prismatic section (42) is equal to the outer diameter of the cylindrical section (41).

8. Gate valve anti-opening lock according to claim 1, characterized in that the outer diameter of the locking piece (3) is equal to the outer diameter of the annular protrusion (12).

9. Gate valve anti-opening and closing lock according to claim 1, characterized in that the latch provided on the lock block (3) comprises a plurality of protrusions evenly distributed around the axis of the lock block (3) and the latch provided on the cylindrical section (41) comprises a plurality of protrusions evenly distributed around the axis of the cylindrical section (41).

10. Gate valve anti-opening lock according to claim 1, characterized in that the difference between the outer diameter of the lock block (3) and the inner diameter of the lock cylinder (21) is 2mm.