Gate valve anti-opening lock

Abstract

The present application is about a gate valve anti-switch lock, belonging to the field of oil and gas extraction technology. The gate valve anti-switch lock includes an anti-theft rod, a lock plate, a lock block and a booster block, wherein: the anti-theft rod has a U-shaped rod structure, a clamping ring is arranged at the middle position of the anti-theft rod, both ends of the anti-theft rod are provided with external threads, both ends of the lock plate are provided with lock cylinders, and both ends of the lock plate are also provided with first through holes, the lock block has a cylindrical structure, and the inner wall of the lock block is provided with internal threads that match the external threads at both ends of the anti-theft rod. The booster block includes a cylindrical section and a prism section, the outer diameter of the cylindrical section is smaller than the inner diameter of the lock cylinder, the circumscribed circle diameter of the prism section is smaller than the inner diameter of the lock cylinder, the end face of the cylindrical section of the booster block is provided with a circular groove, and the two opposite faces between the cylindrical section and the lock block are provided with mutually matching latch teeth. By adopting the present application, the gate valve can be locked, effectively preventing production accidents or theft accidents caused by others opening it by mistake or intentionally.

Description

Technical Field

[0001] The present application relates to the technical field of oil and gas exploitation, and in particular to a gate valve anti-opening and closing lock. Background Art

[0002] In the process of oilfield development, gate valves are used in both oil and water well production and external transmission. Workers can open or close the gate valve by rotating the hand wheel of the gate valve. However, some gate valves are located in the field and are easily opened or closed by mistake, causing major production accidents. Some gate valves located at the end of the pipeline may be easily opened by people to steal the oil in the pipeline, causing certain losses.

[0003] At present, the commonly used method on site is to lock the gate valve with a chain, but the lock is easily damaged and the effect is poor. Summary of the invention

[0004] The embodiment of the present application provides a gate valve anti-opening and closing lock, which can solve the technical problems existing in the related technology. The technical solution of the gate valve anti-opening and closing lock is as follows:

[0005] The embodiment of the present application provides a gate valve anti-opening and closing lock, which includes an anti-theft rod 1, a lock plate 2, a lock block 3 and a booster block 4, wherein:

[0006] The anti-theft rod 1 has a U-shaped rod structure, a clamp ring 11 is arranged at the middle position of the anti-theft rod 1, the inner diameter of the clamp ring 11 is larger than the outer diameter of the screw of the gate valve 5, both ends of the anti-theft rod 1 are arranged with external threads, the first end of the external threads is located on the end face of the anti-theft rod 1, and an annular protrusion 12 is arranged at the second end of the external threads 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 protrusion 12 is smaller than the inner diameter of the annular handle of the handwheel of the gate valve 5;

[0007] The lock plate 2 is provided with a lock cylinder 21 at both ends, the axis of the lock cylinder 21 is perpendicular to the surface of the lock plate 2 at the position where the lock cylinder 21 is located, and the lock plate 2 is provided with a first through hole 22 at both ends, the first through hole 22 is coaxial with the lock cylinder 21, the distance between the centers 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 the 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 protrusion 12;

[0008] The lock block 3 has a cylindrical structure, and an inner wall of the lock block 3 is provided with an inner thread that matches the outer threads at both ends of the anti-theft rod 1. The outer diameter of the lock block 3 is smaller than the inner diameter of the lock cylinder 21 and larger than the diameter of the first through hole 22.

[0009] The booster block 4 includes 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 circumscribed circle diameter 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 booster block 4 is greater than the axial length of the lock cylinder 21. A circular groove 43 is provided on the end face of the cylindrical section 41 of the booster block 4. The diameter of the circular groove 43 is greater than the outer diameter of the 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 greater than the axial length of the portion of the anti-theft rod 1 provided with the external thread. Mutually matching latch teeth are provided on the two opposite surfaces between the cylindrical section 41 and the lock block 3.

[0010] In a possible implementation, the gate valve anti-opening lock further includes a screw 6 and a gasket 7, and screw holes 13 are provided at both ends of the anti-theft rod 1, the screw holes 13 are adapted to the screws 6, and the pitch of the screw holes 13 is equal to the pitch of the external threads at both ends of the anti-theft rod 1;

[0011] An axial second through hole 44 is provided on the end surface of the prism section 42 of the booster block 4 . 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 .

[0012] In one possible implementation, 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 the shape and size of the cross section of the prismatic segment 42 perpendicular to the axial direction of the prismatic segment 42.

[0013] In one possible implementation, the prism segment 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 segment 42 perpendicular to the axial direction of the prism segment 42.

[0014] In a possible implementation, the lock plate 2 has an arc-shaped structure at its center, and the shape of the arc-shaped plate matches the shape of the body of the gate valve 5 .

[0015] In a possible implementation, the outer diameter of the locking block 3 is equal to the outer diameter of the cylindrical section 41 .

[0016] In a possible implementation, the diameter of the circumscribed circle of the prism segment 42 is equal to the outer diameter of the cylindrical segment 41 .

[0017] In a possible implementation, the outer diameter of the locking block 3 is equal to the outer diameter of the annular protrusion 12 .

[0018] In a possible implementation, the latching teeth provided on the locking block 3 include a plurality of protrusions evenly distributed around the axis of the locking block 3 , and the latching teeth provided on the cylindrical segment 41 include a plurality of protrusions evenly distributed around the axis of the cylindrical segment 41 .

[0019] In a possible implementation, the difference between the outer diameter of the locking block 3 and the inner diameter of the locking cylinder 21 is 2 mm.

[0020] The technical solution provided by the embodiments of the present application includes at least the following beneficial effects:

[0021] The embodiment of the present application provides a gate valve anti-opening and closing lock, which can lock the handwheel of the gate valve by means of an anti-theft rod, a lock plate and a lock block, so that the rotation of the handwheel of the locked gate valve is restricted, thereby locking the gate valve under the action of the gate valve anti-opening and closing lock, thereby preventing production accidents or theft accidents caused by accidental or intentional opening of the gate valve.

[0022] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a structural schematic diagram of a gate valve anti-opening and closing lock shown in an embodiment of the present application;

[0025] Figure 2 It is a structural schematic diagram of a gate valve anti-opening and closing lock shown in an embodiment of the present application;

[0026] Figure 3 is a schematic structural diagram of an anti-theft rod shown in an embodiment of the present application;

[0027] Figure 4 is a structural schematic diagram of a lock plate shown in an embodiment of the present application;

[0028] Figure 5 It is a structural schematic diagram of a locking block shown in an embodiment of the present application;

[0029] Figure 6 is a structural schematic diagram of a booster block shown in an embodiment of the present application;

[0030] Figure 7 is a structural schematic diagram of a booster block shown in an embodiment of the present application;

[0031] Figure 8 It is a cross-sectional schematic diagram of installing a gate valve anti-opening and closing lock shown in an embodiment of the present application;

[0032] Fig. 9It is a structural schematic diagram of a gate valve anti-opening and closing lock shown in an embodiment of the present application;

[0033] Fig.10 is a schematic structural diagram of an anti-theft rod shown in an embodiment of the present application;

[0034] Fig.11 It is a cross-sectional schematic diagram of installing a gate valve anti-opening and closing lock shown in an embodiment of the present application.

[0035] Legend

[0036] 1. Anti-theft rod;

[0037] 11. snap ring; 12. annular protrusion; 13. screw hole;

[0038] 2. Lock plate;

[0039] 21. lock cylinder; 22. first through hole;

[0040] 3. Lock block;

[0041] 4. Booster block;

[0042] 41. cylindrical section; 42. prismatic section; 43. circular groove; 44. second through hole;

[0043] 5. Gate valve;

[0044] 6. Screws;

[0045] 7. Gasket. DETAILED DESCRIPTION

[0046] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0047] The present application embodiment provides a gate valve anti-opening lock, such as Figure 1 and Figure 2 As shown, the gate valve anti-opening and closing lock includes an anti-theft rod 1, a lock plate 2, a lock block 3 and a booster block 4.

[0048] The opening and closing part of the gate valve 5 is a gate plate, and the movement direction of the gate plate is perpendicular to the direction of the fluid. For example, if a gate valve is set on an oil and gas export pipeline, the openings at both ends of the gate valve body need to be connected to the two oil and gas export pipelines respectively. When the gate valve 5 is closed, the gate plate intercepts between the two opposite openings of the two oil and gas export pipelines, so that the two oil and gas export pipelines cannot be connected. When the gate valve 5 needs to be opened, the gate plate needs to be retracted so that the two connected oil and gas export pipelines are connected. When the gate valve 5 needs to be closed, the gate plate needs to be released so that the gate plate blocks the passage between the two oil and gas export pipelines.

[0049] The gate valve 5 is provided with a hand wheel and a screw, the hand wheel is threadedly connected to the screw, the screw is fixedly connected to the gate plate of the gate valve 5, the axis of the screw is perpendicular to the axis of the pipeline connected to the gate valve 5, and the axis of the valve plate is parallel to the axis of the pipeline connected to the gate valve 5. When the hand wheel is turned, the hand wheel and the screw move relative to each other, so that the screw moves in the axial direction, thereby driving the gate plate to move in a direction perpendicular to the axis of the pipeline connected to the gate valve 5, thereby realizing the opening and closing of the gate valve 5. Since the opening and closing of the gate valve 5 is driven by the rotation of the screw to move in the direction of the axis, thereby driving the valve plate to move, the opening and closing of the gate valve 5 requires turning the hand wheel a large number of times, for example, 20 turns.

[0050] When the gate valve 5 needs to be opened, the hand wheel provided on the gate valve 5 is rotated in one direction, and the screw can move in the direction away from the pipe connected to the gate valve 5. At this time, the gate plate connected to the screw also moves with the screw and no longer blocks the two pipes connected to the gate valve 5, so that the two pipes can be connected to each other.

[0051] When the gate valve 5 needs to be closed, the hand wheel provided on the gate valve 5 can be rotated in another direction, and the screw rod can move toward the direction close to the pipeline connected to the gate valve 5. At this time, the gate plate connected to the screw rod also moves with the screw rod, blocking the passage between the two pipelines connected to the gate valve 5, so that the two pipelines are no longer connected.

[0052] The anti-theft rod 1 has a U-shaped rod structure, and a clamping ring 11 is arranged at the middle position of the anti-theft rod 1. The inner diameter of the clamping ring 11 is larger than the outer diameter of the screw of the gate valve 5. External threads are arranged at both ends of the anti-theft rod 1. The first end of the external thread is located on the end face of the anti-theft rod 1. An annular protrusion 12 is arranged at the second end of the external thread on the anti-theft rod 1. The sum of the distance between the axes of the two ends of the anti-theft rod 1 and the diameter of the annular protrusion 12 is smaller than the inner diameter of the annular handle of the handwheel of the gate valve 5.

[0053] In implementation, Figure 3 As shown, the anti-theft rod 1 has a U-shaped rod structure, including two side rods with parallel axes and an intermediate rod connecting the two side rods. The middle position of the anti-theft rod 1 is the center position of the intermediate rod. A clamping ring 11 is arranged at the center position of the intermediate rod. The inner diameter of the clamping ring 11 is larger than the outer diameter of the screw of the gate valve 5, so that the clamping ring 11 can be mounted on the screw of the gate valve 5.

[0054] The anti-theft rod 1 has a U-shaped rod structure. When the retaining ring 11 is mounted on the screw of the gate valve 5, the distance between the axes at both ends of the anti-theft rod 1 plus twice the radius of the annular protrusion 12 (equal to the diameter of the annular protrusion 12) is the maximum width between the two side rods of the anti-theft rod 1. When the maximum width between the two side rods of the anti-theft rod 1 is smaller than the inner diameter of the annular handle of the handwheel of the gate valve 5, the two side rods of the anti-theft rod 1 with parallel axes can pass through the gap within the annular handle of the handwheel of the gate valve 5, so that the end of the anti-theft rod 1 reaches the side of the body of the gate valve 5 away from the handwheel.

[0055] The ends of the two side bars whose axes are parallel to each other are the two ends of the anti-theft rod 1, and both ends of the anti-theft rod 1 are provided with external threads. As for one of the ends of the anti-theft rod 1, the first end of the external thread is located on the end face of the end of the side bar of the anti-theft rod 1, and an annular protrusion 12 is provided at the second end of the external thread, that is, an annular protrusion 12 is provided on each of the two side bars of the anti-theft rod 1, and the annular protrusion 12 has a certain distance from the end face of the anti-theft rod 1, and the external thread is provided between the end face of the anti-theft rod 1 and the annular protrusion 12.

[0056] Optionally, the outer diameters of the anti-theft rod 1 at both ends of the annular protrusion 12 (i.e., the outer diameter of the side rod of the anti-theft rod 1 and the outer diameter of the end of the anti-theft rod 1 where the external thread is provided) may be equal or unequal, and this embodiment does not limit this.

[0057] Lock cylinders 21 are respectively provided at both ends of the lock plate 2, and the axis of the lock cylinder 21 is perpendicular to the surface of the lock plate 2 at the position where the lock cylinder 21 is located. First through holes 22 are also respectively provided at both ends of the lock plate 2, and the first through holes 22 are coaxial with the lock cylinder 21. The distance between the centers 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 the first through holes 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 protrusion 12.

[0058] In practice, the lock plate 2 may be a rectangular plate, the length of which is greater than the distance between the axes of the two side bars of the anti-theft rod 1. A lock cylinder 21 is provided at each end of the lock plate 2, and the axis of the lock cylinder 21 is perpendicular to the surface of the lock plate 2 where the lock cylinder is located. First through holes 22 are provided at each end of the lock plate 2, corresponding to the lock cylinder 21. The first through holes 22 are coaxially arranged with the lock cylinder 21. The distance between the centers 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 (i.e., the axes of the two side bars of the anti-theft rod 1). The diameter of the first through hole 22 is greater than the outer diameter of the two ends of the anti-theft rod 1 (i.e., the outer diameter of the end of the anti-theft rod 1 where the external thread is provided), and the diameter of the first through hole 22 is also smaller than the outer diameter of the annular protrusion 12.

[0059] The staff can respectively cover the two first through holes 22 on the two ends of the anti-theft rod 1, so that the lock plate 2 is covered on the anti-theft rod 1, and the anti-theft rod 1 and the lock plate 2 are covered on the gate valve 5. The annular protrusions 12 provided at the two ends of the anti-theft rod 1 can clamp the lock plate 2, so that the first through hole 22 can only be covered on the part of the anti-theft rod 1 provided with the external thread.

[0060] Optionally, the locking plate 2 has an arc-shaped structure at its center, and the shape of the arc-shaped plate matches the shape of the body of the gate valve 5 .

[0061] In implementation, Figure 4 As shown, the lock plate 2 may be provided with an arc at the center position, and the positions where the lock cylinder 21 is provided on both sides of the arc are still flat plates. The arc provided at the center position can make the lock plate 2 fit more closely with the body of the gate valve 5, which is more conducive to the locking of the gate valve anti-switch lock provided in the embodiment of the present application.

[0062] The lock block 3 has a cylindrical structure, and an inner wall of the lock block 3 is provided with internal threads that match the external threads at both ends of the anti-theft rod 1 . The outer diameter of the lock block 3 is smaller than the inner diameter of the lock cylinder 21 and larger than the diameter of the first through hole 22 .

[0063] In implementation, Figure 5 As shown, the locking block 3 is cylindrical with a certain wall thickness. An internal thread is provided on the inner wall of the locking block 3. The locking block 3 can be threadedly connected to the portion with an external thread at the end of the anti-theft rod 1 by means of the internal thread, so that the locking block 3 is threadedly connected to the end of the anti-theft rod 1, thereby fixing the relative position of the locking plate 2 clamped between the locking block 3 and the anti-theft rod 1.

[0064] 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 placed in the lock cylinder 21. In addition, the outer diameter of the lock block 3 is larger than the diameter of the first through hole 22 on the lock plate 2. After the lock block 3 is placed in the lock cylinder 21 from the open end of the lock cylinder 21, the lock block 3 will not fall out from the first through hole 22 at the other end of the lock cylinder 21.

[0065] The booster block 4 includes 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 circumscribed circle diameter 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 booster block 4 is greater than the axial length of the lock cylinder 21. A circular groove 43 is provided on the end surface of the cylindrical section 41 of the booster block 4. The diameter of the circular groove 43 is greater than the outer diameter of the 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 greater than the axial length of the part of the anti-theft rod 1 provided with the external thread. Mutually matching latch teeth are provided on the two opposite surfaces between the cylindrical section 41 and the lock block 3.

[0066] In implementation, Figure 6 and Figure 7As shown, in terms of shape, the booster block 4 can be divided into two parts, one part is a cylindrical section 41 in a cylindrical shape, and the other part is a prismatic section 42 in a prismatic shape. The cylindrical section 41 and the prismatic section 42 are an integral structure, so the two end faces of the booster block 4 correspond to one end face of the cylindrical section 41 and one end face of the prismatic section 42.

[0067] First, because the booster block 4 is used to assist the fixed connection between the lock block 3 and the anti-theft rod 1, the staff needs to insert the booster block 4 into the lock cylinder 21 from the opening of the lock cylinder 21 when using it. Therefore, the maximum outer diameter of the booster 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 booster 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 booster block 4 is also 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 can be 2 mm, or other reasonable sizes, which can be set according to specific circumstances, and this embodiment does not limit this.

[0068] Secondly, for the cylindrical section 41 of the boosting block 4, a circular groove 43 is provided on the end surface of the cylindrical section 41, which is used to prevent the end of the anti-theft rod 1 from hindering the insertion of the boosting block 4 when the staff inserts the boosting block 4 into the lock cylinder 21. Therefore, the diameter of the circular groove 43 is larger than the outer diameter of the end of the anti-theft rod 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 lock block 3 is larger 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 can be larger than the axial length of the cylindrical section 41, can be equal to the axial length of the cylindrical section 41, or can be smaller than the axial length of the cylindrical section 41, that is, the groove bottom of the circular groove 43 can be located inside the prism section 42, can be located adjacent to the prism section 42 and the cylindrical section 41, or can be located inside the cylindrical section 41. It can be set accordingly according to the specific situation, and this embodiment does not limit this.

[0069] Mutually matching latching teeth are provided on the two opposite surfaces between the cylindrical section 41 and the locking block 3. When the two opposite surfaces of the cylindrical section 41 and the locking block 3 contact each other, the latching teeth on the two surfaces can be locked with each other. When either the cylindrical section 41 or the locking block 3 rotates around its own axis, the other can rotate in the same direction with it through the locked latching teeth.

[0070] Optionally, there are many possibilities for the shape of the latching teeth between the cylindrical section 41 and the locking block 3, and the following is one of them:

[0071] The latching teeth arranged on the locking block 3 include a plurality of protrusions evenly distributed around the axis of the locking block 3 , and the latching teeth arranged on the cylindrical section 41 include a plurality of protrusions evenly distributed around the axis of the cylindrical section 41 .

[0072] In practice, the latching teeth provided between the locking block 3 and the cylindrical section 41 may be a plurality of protrusions respectively provided around their respective axes, and the shape of the latching teeth may be a rectangular tooth or a triangular tooth, which is not limited in this embodiment.

[0073] Optionally, the outer diameter of the locking block 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 block 3 may be equal to the outer diameter of the annular protrusion 12.

[0074] When installing the gate valve anti-opening and closing lock provided in the embodiment of the present application, the two side rods of the anti-theft rod 1 can be respectively passed through the two different holes of the hand wheel of the gate valve 5, and each side rod of the anti-theft rod 1 passes through a different hole, so that the two side rods are located on both sides of the body of the gate valve 5, and then the clamping ring 11 provided on the middle rod of the anti-theft rod 1 is sleeved on the screw rod of the gate valve 5, as shown in FIG. Figure 1 shown.

[0075] Then, the lock plate 2 can be mounted on the anti-theft rod 1 in a direction in which the first through hole 22 is close to the body of the gate valve 5 and the opening end of the lock cylinder 21 is away from the body of the gate valve 5. Figure 8 As shown, Figure 8 This is a cross-sectional diagram of installing a gate valve anti-opening lock. The lock plate 2 is mounted on the parts of the anti-theft rod 1 at both ends with external threads through the first through hole 22. Since the second end of the external thread is provided with an annular protrusion 12, and the diameter of the first through hole 22 is smaller than the outer diameter of the annular protrusion 12, the lock plate 2 is mounted on the parts of the anti-theft rod 1 at both ends with external threads and will not move toward the middle rod. At this time, most of the parts of the anti-theft rod 1 at both ends with external threads are located in the lock cylinder 21.

[0076] Then the staff can put the lock block 3 into the lock cylinder 21 with the end with the latch gear facing the open end of the lock cylinder 21 and the end without the latch gear facing the bottom of the lock cylinder 21, and threadedly connect the lock block 3 with the parts with external threads at both ends of the anti-theft rod 1. At this time, since the length of the lock cylinder 21 is greater than the length of the lock block 3, the staff cannot directly screw the lock block 3 into the bottom of the lock cylinder 21 by hand (that is, one end face of the lock block 3 is in contact with the lock plate 2). Therefore, after the lock block 3 is screwed into a part of the lock cylinder 21, the booster block 4 can be placed in the lock cylinder 21, and the booster block 4 can be placed in 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 gear provided on the end face of the cylindrical section 41 of the booster block 4 engages with the latch gear provided on the end face of the lock block 3.

[0077] After the locking teeth between the booster block 4 and the locking block 3 are engaged with each other, the booster block 4 can be pushed in the axial direction toward the locking block 3 while being rotated. The prismatic segment 42 of the booster block 4 helps people to rotate the booster block 4.

[0078] Since the staff has been pushing the boost block 4 toward the locking block 3, and the locking block 3 is threadedly connected to the external threaded portion of the end of the anti-theft rod 1 and cannot move axially without rotation, pushing the boost block 4 cannot affect the axial displacement of the locking block 3. However, pushing the boost block 4 can cause the boost block 4 and the locking block 3 to squeeze each other, so that the latching teeth between the boost block 4 and the locking block 3 will not be relatively misaligned, and the latching teeth on the two end faces are always in a locked state. Therefore, in the process of pushing the boost block 4 toward the locking block 3, the boost block 4 is rotated, and the locking block 3 will rotate with the boost block 4 under the action of the latching teeth, thereby screwing the locking block 3 into the bottom of the lock cylinder 21, that is, the end face of the locking block 3 without the latching teeth is in contact with the lock plate 2.

[0079] After the locking block 3 is rotated by rotating the booster block 4 and then screwed into the bottom of the lock cylinder 21, the booster block 4 can be taken out of the lock cylinder 21. At this time, the locking block 3 is threadedly connected and locked with the anti-theft rod 1, so that the anti-theft rod 1 and the lock plate 2 lock the gate valve 5. When someone turns the handwheel of the gate valve 5 when the anti-theft rod 1 and the lock plate 2 are locked, the handwheel cannot complete a full rotation due to the locking of the anti-theft rod 1 and the lock plate 2. To open or close the gate valve 5, the handwheel needs to be rotated multiple times, so the gate valve 5 cannot be opened. In addition, the locking block 3 is located inside the lock cylinder 21. Without an auxiliary tool (booster block 4), it is extremely difficult to twist the locking block 3, thereby preventing others from accidentally opening or intentionally opening the gate valve.

[0080] When disassembling the gate valve anti-switch lock of the embodiment of the present application, it is necessary to put the booster 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 then adjust the position of the booster block 4 so that the latching teeth set on the end face of the cylindrical section 41 of the booster block 4 engage with the latching teeth set on the end face of the lock block 3, and then, while pushing the booster block 4 in the direction of the lock block 3, rotate the booster block 4 so that the booster block 4 drives the lock block 3 to rotate, thereby screwing the lock block 3 out of the lock cylinder, so that the lock block 3 is separated from the external threaded portion of the end of the anti-theft rod 1. At this time, the lock plate 2 can be removed from the anti-theft rod 1, and then the anti-theft rod 1 is removed from the handwheel of the gate valve 5, thereby realizing the disassembly of the gate valve anti-switch lock.

[0081] The present application also provides a gate valve anti-opening lock, such as Fig. 9As shown, the gate valve anti-switch lock includes, in addition to the above-mentioned parts, screws 6 and gaskets 7. Both ends of the anti-theft rod 1 are provided with screw holes 13, which are compatible with the screws 6, and the pitch of the screw hole 13 is equal to the pitch of the external threads at both ends of the anti-theft rod 1.

[0082] An axial second through hole 44 is provided on the end surface of the prism section 42 of the booster block 4 . 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 .

[0083] In implementation, Fig.10 As shown, a screw hole 13 is provided on each end face of both ends of the anti-theft rod 1, and the screw hole 13 is adapted to the screw 6, and the screw 6 can be threadedly connected with the screw hole 13. An axial second through hole 44 is provided on the end face of the prism section 42 of the booster 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, so that when the screw 6 is installed, the screw 6 can pass through the booster block 4 through the second through hole 44, thereby being threadedly connected with the screw hole 13 on the anti-theft rod 1.

[0084] The gate valve anti-opening and closing lock may further include a gasket 7 , which may protect the screw 6 and the boosting block 4 , and may also enhance the friction between the screw 6 and the boosting block 4 .

[0085] The pitch of the screw hole 13 is equal to the pitch of the external threads at both ends of the anti-theft rod 1. In this way, when the screw 6 is threadedly connected to the screw hole 13 and the locking block 3 is threadedly connected to the external threads at the ends of the anti-theft rod 1, the axial displacement of the screw 6 when it rotates one circle is equal to the axial displacement of the locking block 3 when it rotates one circle, so that the staff can rotate the screw 6 and the locking block 3 at the same time without changing the relative position between the two.

[0086] Optionally, 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 the shape and size of the cross section of the prismatic segment 42 perpendicular to the axial direction of the prismatic segment 42 .

[0087] In implementation, the screw head of the screw 6 can be set to a prismatic structure, which can facilitate the staff to screw the screw 6.

[0088] The cross section of the screw head of the screw 6 perpendicular to the axial direction of the screw 6 is a regular polygon, and the cross section of the prism segment 42 perpendicular to the axial direction of the prism segment 42 is also a regular polygon, and the number of sides of the regular polygon cross section of the screw head is equal to the number of sides of the regular polygon cross section of the prism segment 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 segment 42. In this way, the staff can screw the screw 6 and the prism segment 42 at the same time, and the screwing is simple and convenient.

[0089] Optionally, the prism structure of the screw head of the screw 6 and the prism section 42 of the booster block 4 may be provided with a hexagonal prism, and the specific structure may be as follows:

[0090] The prism segment 42 is a hexagonal prism, and the screw head of the screw 6 has a hexagonal prism structure. 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 segment 42 perpendicular to the axial direction of the prism segment 42.

[0091] When installing the gate valve anti-opening lock provided with the screw hole 13, the screw 6 and the gasket 7, Fig.11 As shown, Fig.11 It is a cross-sectional schematic diagram when installing a gate valve anti-opening and closing lock. The operation process of installing the anti-theft rod 1 and the lock plate 2 is the same as the operation process of installing the gate valve anti-opening and closing lock without the screw hole 13, the screw 6 and the gasket 7. First, the two side rods of the anti-theft rod 1 are respectively passed through the two different holes of the hand wheel of the gate valve 5, so that the two side rods are located on both sides of the body of the gate valve 5, and then the clamping ring 11 provided on the middle rod of the anti-theft rod 1 is sleeved on the screw rod of the gate valve 5, and then the lock plate 2 is sleeved on the anti-theft rod 1 in the direction that the first through hole 22 is close to the body of the gate valve 5 and the opening end of the lock cylinder 21 is away from the body of the gate valve 5.

[0092] Then the staff can put the locking block 3 into the lock cylinder 21 with the end with the latch gear facing the open end of the lock cylinder 21 and the end without the latch gear facing the bottom of the lock cylinder 21, and then screw the locking block 3. After the locking block 3 is partially screwed into the lock cylinder 21, the boosting block 4 can be 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. The position of the boosting block 4 is adjusted so that the latch gear provided on the end face of the cylindrical section 41 of the boosting block 4 engages with the latch gear provided on the end face of the locking block 3.

[0093] Then, the washer 7 is mounted on the screw rod of the screw 6, and the screw 6 is screwed into the screw hole 13 provided at the end 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 booster block 4 are pressed against each other, and then the screw 6 is stopped from being screwed. At this time, since the locking block 3 is not screwed, the locking block 3 does not undergo axial displacement, and the booster block 4 and the screw 6 are pressed against each other. Under the action of the screw 6, the booster block 4 and the locking block 3 are pressed against each other and fit tightly together. If the screw 6 and the prism section 42 of the booster block 4 are rotated at the same time, the booster block 4 can drive the lock block 3 to rotate through the engaged teeth, so that the lock block 3 moves toward the bottom of the lock cylinder 21. Since the pitch of the thread of the screw hole 13 is the same as the pitch of the external thread of the end of the anti-theft rod 1, when the lock block 3 moves a certain distance toward the bottom of the lock cylinder 21, the screw 6 also moves the same distance toward the bottom of the lock cylinder 21, so that the screw 6 always pushes the booster block 4 toward the direction of the lock block 3, so that when the lock block 3 moves toward the bottom of the lock cylinder 21, the teeth between the booster block 4 and the lock block 3 are always engaged, and the booster block 4 can always drive the lock block to rotate. Therefore, the screw 6 and the booster block 4 are rotated at the same time until the lock block 3 is screwed into the bottom of the lock cylinder 21, that is, the end face of the lock block 3 without the teeth is in contact with the lock plate 2.

[0094] After the locking block 3 is driven to rotate by rotating the screw 6 and the booster block 4 and then screwed into the bottom of the lock cylinder 21, the screw 6, the gasket 7 and the booster block 4 can be taken out of the lock cylinder 21. At this time, the locking block 3 is threadedly connected and locked with the anti-theft rod 1, so that the anti-theft rod 1 and the lock plate 2 lock the gate valve 5. When someone turns the hand wheel of the gate valve 5 when the anti-theft rod 1 and the lock plate 2 are locked, the hand wheel cannot complete a full rotation due to the locking of the anti-theft rod 1 and the lock plate 2, so that the gate valve 5 cannot be opened. In addition, the locking block 3 is located inside the lock cylinder 21. In the absence of auxiliary tools (booster block 4), it is extremely difficult to twist the locking block 3, thereby preventing others from opening the gate valve by mistake or intentionally.

[0095] When disassembling the gate valve anti-opening lock provided with the screw hole 13, the screw 6 and the gasket 7, it is necessary to put the booster block 4 into the lock cylinder 21 with the cylindrical section 41 facing the inside of the lock cylinder 21 and the prism section 42 facing the outside of the lock cylinder 21, and then adjust the position of the booster block 4 so that the latching teeth provided on the end surface of the cylindrical section 41 of the booster block 4 and the latching teeth provided on the end surface of the lock block 3 are engaged with each other. Then, the gasket 7 is put on the screw rod part of the screw 6, and then the screw rod 6 is threadedly connected with the screw hole 13, and the screw rod 6 is rotated until the screw rod 6 and the booster block 4 are squeezed against each other, and then the booster block 4 and the screw 6 are rotated at the same time, so that the booster block 4 drives the lock block 3 to rotate, thereby screwing the lock block 3 out of the lock cylinder, so that the lock block 3 is separated from the external threaded part of the end of the anti-theft rod 1, and then the lock plate 2 can be removed from the anti-theft rod 1, and then the anti-theft rod 1 is removed from the hand wheel of the gate valve 5, thereby realizing the disassembly of the gate valve anti-opening lock.

[0096] The screw hole 13 and the screw rod 6 are provided so that the booster block 4 and the locking block 3 can always fit closely to each other. When installing and removing the gate valve anti-switch lock, the staff does not need to push the booster block 4 toward the locking block 3 all the time, which saves manpower and is simpler and more convenient to use.

[0097] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A gate valve anti-opening lock, characterized in that: The gate valve anti-opening and closing lock comprises an anti-theft rod (1), a lock plate (2), a lock block (3) and a booster block (4), wherein: The anti-theft rod (1) has a U-shaped rod structure, a clamping ring (11) is arranged at the middle position of the anti-theft rod (1), the inner diameter of the clamping ring (11) is larger than the outer diameter of the screw rod of the gate valve (5), both ends of the anti-theft rod (1) are provided with external threads, the first end of the external threads is located on the end surface of the anti-theft rod (1), an annular protrusion (12) is arranged at the second end of the external threads 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 protrusion (12) is smaller than the inner diameter of the annular handle of the handwheel of the gate valve (5); A lock cylinder (21) is provided at both ends of the lock plate (2), the axis of the lock cylinder (21) is perpendicular to the surface of the lock plate (2) where the lock cylinder (21) is located, and a first through hole (22) is provided at both ends of the lock plate (2), the first through hole (22) is coaxial with the lock cylinder (21), the distance between the centers 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 the 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 protrusion (12); The lock block (3) has a cylindrical structure, and an inner wall of the lock block (3) is provided with internal threads that match the external threads at both ends of the anti-theft rod (1); the outer diameter of the lock block (3) is smaller than the inner diameter of the lock cylinder (21) and larger than the diameter of the first through hole (22); The booster 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 the circumscribed 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 booster block (4) is greater than the axial length of the lock cylinder (21); a circular groove (43) is provided on the end surface of the cylindrical section (41) of the booster block (4); the diameter of the circular groove (43) is greater than the outer diameters of both 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 greater than the axial length of the portion of the anti-theft rod (1) provided with the external thread; and mutually matching latch teeth are provided on two opposing surfaces between the cylindrical section (41) and the lock block (3).

2. The gate valve anti-opening lock according to claim 1 is characterized in that: The gate valve anti-opening and closing lock further comprises a screw (6) and a gasket (7), and screw holes (13) are provided at both ends of the anti-theft rod (1), the screw holes (13) are adapted to the screws (6), and the pitch of the screw holes (13) is equal to the pitch of the external threads at both ends of the anti-theft rod (1); An axial second through hole (44) is provided on the end surface of the prism section (42) of the booster 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).

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

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

5. The gate valve anti-opening lock according to claim 1 is characterized in that: The lock plate (2) has an arc-shaped structure at its center, and the shape of the arc-shaped structure matches the shape of the body of the gate valve (5).

6. The gate valve anti-opening lock according to claim 1 is characterized in that: The outer diameter of the locking block (3) is equal to the outer diameter of the cylindrical section (41).

7. The gate valve anti-opening and closing lock according to claim 1 is characterized in that: The diameter of the circumscribed circle of the prism segment (42) is equal to the outer diameter of the cylindrical segment (41).

8. The gate valve anti-opening lock according to claim 1 is characterized in that: The outer diameter of the locking block (3) is equal to the outer diameter of the annular protrusion (12).

9. The gate valve anti-opening and closing lock according to claim 1 is characterized in that: The latching teeth arranged on the locking block (3) include a plurality of protrusions evenly distributed around the axis of the locking block (3), and the latching teeth arranged on the cylindrical section (41) include a plurality of protrusions evenly distributed around the axis of the cylindrical section (41).

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

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