CN101709791A - Ball valve with lock - Google Patents

Abstract

The invention discloses a ball valve with a lock, comprising a valve body and a handle that controls on-off of the ball valve. Two bumps are arranged on the outer wall of a shell of the valve body, and the positions of the two bumps are consistent to positions where the handle are in a completely on or off state. A latch sliding longitudinally along the handle is arranged on one side adjacent to the bumps on the handle. The front end of the latch extends towards the bumps and is provided with a notch which is meshed with the bumps. The handle is further provided with a longitudinal sliding groove through which a locking mechanism for locking or loosening the latch penetrates. The locking mechanism is a knurled screw penetrating through the sliding groove, and a retainer ring which prevents the knurled screw from pulling away is further arranged at the lower end of the knurled screw. In the invention, under the condition of unartificial unlocking, the condition that the valve is opened or closed abnormally caused by rotation of the handle due to other factors can be avoided, and the handle can be locked in the current work state when the handle is not needed to rotate, therefore, the structure of the invention is simple.

Description

Ball valve with lock

technical field

The present invention relates to ball valves.

Background technique

At present, the commonly used ball valve is mainly composed of valve body, valve seat, ball, valve stem and handle. The working principle is to apply a certain torque on the upper end of the valve stem with the help of the handle and transmit it to the ball to make it rotate 90°. The through hole of the ball coincides with or is perpendicular to the center line of the valve body channel, and the ball valve completes the fully open or fully closed position. action. However, in actual use, due to some human or other factors, the handle is often touched unnecessarily, resulting in abnormal opening and closing of the valve, resulting in unnecessary waste of resources or certain potential safety hazards. The State Intellectual Property Office of China disclosed a lockable ball valve on December 7, 2005. The patent number is 200410069419.9. It sets the handle as a folding structure, and after the handle is folded, it is locked with the valve body through a lock and a locking mechanism. . Its structure is relatively complicated, and the handle is easy to turn over during operation due to its folded structure.

Contents of the invention

The technical problem to be solved by the present invention is to provide a ball valve with lock, which has a simple and novel structure, and can manually lock the required working state of the valve after normal opening and closing.

In order to solve the above technical problems, the technical solution adopted by the present invention is: a ball valve with lock, including a valve body and a handle for controlling the opening and closing of the ball valve, characterized in that two protrusions are arranged on the outer wall of the valve body shell, and the The positions of the two protrusions are respectively consistent with the positions of the handle when it is fully opened or closed. A lock buckle that can slide longitudinally along the handle is provided on the side of the handle near the protrusion. The front end of the lock buckle extends toward the direction of the protrusion. The front end of the buckle is provided with a notch that can be engaged with the protrusion, and the handle is also provided with a longitudinal chute, and the chute is equipped with a locking device for locking or releasing the buckle. mechanism.

Preferably, the two protrusions on the valve housing are arranged below the handle, and the lock is arranged on the lower side of the handle.

Preferably, the handle is provided with a longitudinal limit chute that limits the deflection of the buckle.

Preferably, the locking mechanism is a knurled screw threaded on the chute. A knurled screw secures the latch and prevents it from sliding freely.

As an improvement, the lower end of the knurled screw is also provided with a retaining ring that limits the detachment of the knurled screw.

Because the present invention adopts the above-mentioned technical scheme, when the lock catch moves up, the handle can rotate freely, and when the ball valve is fully opened or closed, the lock catch is controlled to move down, and the notch at its lower end is matched with the protrusion corresponding to its lower position. The handle is locked. Therefore, in the case of non-artificial unlocking, the handle rotation will not cause abnormal opening and closing of the valve due to other factors. The present invention can lock the current working state of the handle when the handle does not need to be turned, and has a simple structure.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing:

Fig. 1 is a structural schematic diagram 1 of embodiment 1 of a ball valve with lock of the present invention;

Fig. 2 is a structural schematic diagram II of Embodiment 2 of the ball valve with lock of the present invention.

Detailed ways

As shown in Figure 1, it is the first embodiment of the ball valve with lock of the present invention, which includes a valve body and a handle 1 for controlling the opening and closing of the ball valve. Two protrusions 21 are arranged on the outer wall 2 of the valve body shell. The position of the block 21 is consistent with the position when the handle is fully opened or closed respectively. A lock 3 is provided on the side of the handle 1 close to the bump 21 and can slide longitudinally along the handle. The front end of the lock extends toward the bump. , the front end of the lock buckle is provided with a notch 31 that can be engaged with the protrusion, and the handle is also provided with a longitudinal chute 11, and the chute is equipped with a chute for locking or releasing the lock. The locking mechanism of the buckle, the handle is also provided with a longitudinal limit chute 12 that limits the deflection of the lock buckle. On the lower side of the handle, the locking mechanism is a knurled screw 4 passing through the chute, and the lower end of the knurled screw is also provided with a retaining ring 5 that restricts the knurled screw from coming out.

Fig. 2 is another simple setting structure of the present invention, which is different from the first embodiment in that no retaining ring and longitudinal limiting slide groove are provided.

Of course, the projection on the outer wall of the ball valve housing of the present invention can also be arranged above the handle, the sliding lock is correspondingly arranged above, and the locking mechanism can be arranged on the upper side of the handle or on the lower side. The cooperation structure between the sliding lock and the sliding groove can be varied, and is not limited to the specific structure described in the present invention.

Claims (5)

1. Ball Valve With Lock, comprise the handle (1) that valve body and control ball valve open and close, it is characterized in that: described valve shell outer wall (2) is provided with two projections (21), the position of described two projections is in complete opening with handle respectively or the position consistency when closing, being provided with one by projection one side on the described handle can be along the snap close (3) of handle longitudinal sliding motion, the snap close front end extends to described projection direction, the snap close front end be provided with can with a recess (31) of described projection engagement, also be provided with a chute (11) longitudinally on the described handle, be coated with a locking framework that is used to lock or unclamp described snap close on the described chute.

2. according to the described Ball Valve With Lock of claim 1, it is characterized in that: two projections on the described valve shell are arranged on the below of handle, and described snap close is located at the downside of handle.

3. according to the described Ball Valve With Lock of claim 1, it is characterized in that: described handle is provided with the longitudinal spacing chute (12) of restriction snap close deflection.

4. according to claim 1,2 or 3 described Ball Valve With Locks, it is characterized in that: described locking framework is the knurled screw (4) that is located on the chute.

5. according to claim 1,2 or 3 described Ball Valve With Locks, it is characterized in that: described knurled screw lower end also is provided with the back-up ring (5) that the restriction knurled screw is deviate from.

Images