CN101994439B - Lock device for controlling fluid - Google Patents

Abstract

The invention belongs to the field of mechanical locks, and particularly relates to a lock device for controlling fluid. There is a piston between the lock body and the lock core, wherein: the lock device is fixed on the inlet and outlet channels of the fluid container, and the lock body is provided with a fluid container. The through hole of the lock body that matches the entrance and exit of the lock cylinder. The lock cylinder through hole connected with the through hole of the lock body is provided on the lock cylinder. The core is pulled to make displacement movement. The beneficial effects of the present invention are: it is suitable for the application of locking fluid, and can be locked for one flow direction; the locking device is more concealed, safe, reliable, convenient and practical.

Description

A lock device for controlling fluid

technical field

The invention belongs to the field of mechanical locks, in particular to a lock device for controlling fluid filling or discharging.

Background technique

At present, the general mechanical lock achieves the purpose of controlling the locked object by directly restricting the displacement movement of the locked solid object, but cannot directly restrict the flow of gas or liquid at the entrance and exit of the container. The general effective method for fluid control is to prevent the flow of gas or liquid by locking the valve. The basic feature of the locking valve method is that the lock and the valve structure itself are relatively independent, and the valve itself is a sealing device, so the lock structure must be external. For example, civil petroleum liquefied gas tanks are often used in different operation objects and scenarios, and driven by illegal economic interests, new gas tanks may be embezzled and adulteration incidents may occur. In addition, for applications such as civil petroleum liquefied gas tanks, the lock structure is external, which is inconvenient for end users.

Contents of the invention

In order to overcome the deficiencies in the prior art, the present invention aims to provide a lock device for controlling fluid. The lock device is fixed on the inlet and outlet channels of the fluid container, and the lock and the valve are integrated so that only the lock is opened. It can be filled, but it can be discharged freely when the lock is opened or closed, which solves the problems in the prior art.

The present invention achieves the above object through the following technical solutions: a lock device with a tubular interior for controlling fluid, including a lock body, a lock cylinder, and a piston, wherein: the lock body is fixed on the inlet and outlet channels of the fluid container, and the lock body is There is a through hole of the lock body that matches the inlet and outlet of the fluid container, and a through hole of the lock cylinder that communicates with the through hole of the lock body is provided on the lock cylinder. The piston is placed on the piston bracket, and the piston can produce a certain range of displacement movement relative to the piston bracket. But it can be moved by the piston bracket; the piston bracket is fixed at the bottom of the lock cylinder, and the piston can also produce a certain range of displacement movement relative to the lock cylinder, but it can also be pulled by the lock cylinder; the piston bracket and the lock cylinder can also be moved. All in one. When filling the fluid, you need to use the matching special key or the filling gun head. The filling gun head acts as a key. The guide groove is designed between the gun head and the lock hole to facilitate the alignment operation of the gun head (key). The surface of the gun head is designed with a concave surface, which is used as the "teeth" of the key. All the "teeth" are matched with the lock cylinder. The teeth press against the pins, so that the contact gap between the two pins between the lock core and the lock body is facing the lock core and the lock body. The boundary gap of the lock body forms an active plane, which can be manually rotated, or a spring is placed between the lock body and the lock cylinder to pop out the inner lock cylinder, and the lock cylinder drives the piston to rotate or lift, exposing the through hole of the lock body, and can be filled with fluid normally . If the filling gun head is not paired with the special mechanical lock, the two marbles between the lock cylinder and the lock body will be stuck, limiting the relative movement or displacement between the lock body and the internal lock cylinder, and the piston will be blocked by the external fluid pressure. hole, the fluid container cannot be properly filled. The piston can perform limited relative movement or activity with the lock cylinder. When the fluid in the container is discharged outward, because the pressure of the fluid in the container is greater than the pressure outside the container, the piston is pushed up by force, and the piston is pressed against the lock cylinder, the piston bracket and the lock body. Displacement movement, the through hole of the lock body is opened, and can be discharged normally. The discharge is keyless and the piston opens automatically to expose the through hole. The above-mentioned pin is a kind of pin that mainly hinders the relative movement of the lock body and the lock cylinder; only when the pin is in a specific position, the lock body and the lock cylinder can produce relative movement; the pin lock structure can actually be used with blades or Other types can be substituted.

The piston can be designed as a disc type, with a bottomed groove in the middle, and is installed on the lock cylinder. The piston can move up and down relative to the lock cylinder with a certain gap. A through hole is opened on the piston. When the lock is unlocked, the lock cylinder rotates to drive the piston, so that the through hole on the piston aligns with the through hole of the lock body to form a channel, which can be used for fluid filling or discharge. When the lock is locked, the lock cylinder rotates, driving the piston so that the through hole on the piston does not match the through hole of the lock body. When the fluid is filled, the piston squeezes towards the lock body, blocking the through hole of the lock body, and cannot be filled; When discharging, although the through hole on the piston does not match the through hole of the lock body, the piston and the lock cylinder move relative to each other due to the pressure of the fluid inside the container, and the through hole of the lock body is not blocked, forming a fluid channel, which can be used for The fluid in the container drains normally. In order to reliably block the inflation passage when locking, the piston can be designed into a bowl shape, a spherical shape, or a hemispherical shape, and the engaging part of the through hole of the lock body is also modified accordingly.

The beneficial effects of the present invention are: it is suitable for the application of locking fluid, and can be locked for one flow direction; the locking device is more concealed, safe, reliable, convenient and practical.

Description of drawings

Fig. 1 is a schematic cross-sectional view of a disc type piston lock device for controlling fluid in Embodiment 1 of the present invention;

Fig. 2 is a partial top view schematic diagram of the rotary disc piston in Fig. 1;

Fig. 3 is a schematic cross-sectional view of a ball-type piston lock device for controlling fluid in Embodiment 2 of the present invention.

Marks shown in the figure:

1-lock cylinder, 2-lock body, 3-disc piston, 4-small spring, 5-rear pin, 6-front pin, 7-through hole of lock cylinder, 8-through hole of lock body, 9-teeth , 10-gun head, 11-piston hole, 12-movable groove, 13-flat slot hole, 14-ball piston bracket, 15-big spring, 16-ball piston.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention is further described:

Embodiment 1: As shown in Figure 1, a lock device for controlling fluid includes a lock body 2, a lock cylinder 1, and a wafer-type piston 3, wherein: the lock body 2 is cylindrical and can be fixed on the fluid container On the entrance and exit, the lock body 2 is provided with a lock body through hole 8 that matches the entrance and exit of the fluid container. The lock core 1 is a cylindrical shape that matches the lock body 2. The lock core 1 is provided with a lock body through hole 8 The connected lock cylinder through hole 7, the disc piston 3 is movably connected to the bottom of the lock core 1, the bottom of the lock core 1 matches the movable groove 12 on the disc piston 3, as shown in Figure 2, the disc piston 3 There is a piston hole 11, and the lock body 2 is provided with a flat slot hole 13, the size of the flat slot hole 13 matches the size of the piston hole 11, and a small spring 4 and a rear pin 5 are arranged between the lock body 2 and the lock cylinder 1. , The front pin 6 and the small spring 4 are located inside the lock body 2, conflicting with the rear pin 5, and the rear pin 5 is in conflict with the front pin 6, and the front pin 6 is usually stretched from the inside of the lock cylinder 2 to the lock core through hole 7 by the elastic force , The pin hole of the lock core 2 is provided with a step to prevent the front pin 6 from coming out of the through hole 7 of the lock core. The lock body 2 is movably connected with the lock cylinder 1, and the disc piston 3 is provided with a piston hole 11 which is two piston holes.

In Fig. 1, the structure of the lock body 2 is cylindrical and tubular. When the matching filling gun head 10 or the key is inserted in place, the matching designed teeth 9 make all the front pins 6 in the lock squeezed and between the rear pins 5. The contact surface gap is exactly on the same line as the contact surface gap between the lock cylinder 1 and the lock body 2, forming a moving plane; the supporting filling gun head rotates, and the circular disc piston moves to open the tubular lock. Body through hole 8 can be used for the normal filling of gas flow. After the fluid filling is completed, the filling gun head (key) is rotated to reset and locked. After the filling gun head (key) is pulled out, the rear marble 5 is stuck between the lock body 2 and the lock cylinder 1 by the action of the small spring 4, limiting the relative movement of the lock body 2 and the lock cylinder 1. When the fluid is discharged, because the internal pressure of the container is greater than the external pressure, the piston 3 is squeezed and floats up relative to the lock cylinder, and the through hole 8 of the lock body forms a passage to the bottom of the piston 3 and then to the tubular lock cylinder through hole 7, so no matter whether it is In the locked state, it can be used for normal discharge of fluid. When the fluid is filled, the piston 3 is squeezed by the fluid outside the container, and closes the through hole 8 of the lock body in the locked state, but when the lock is unlocked, the relative movement between the lock core 1 and the lock body 2 opens the passage.

Fig. 2 is a partial plan view of the rotary disc piston. In Fig. 2, there are two piston holes 11 and an active groove 12 on the disc piston 3, and the active groove 12 is used for the rotary motion of the lock cylinder interlocking piston, and When the fluid is discharged, the piston is squeezed by force and moves radially relative to the lock cylinder. When the lock is unlocked, the piston hole 11 moves to the position indicated by the dotted line in Figure 2, and aligns with the flat slot hole 13 on the lock body to form a channel for normal filling of fluid.

Embodiment 2: The difference between this embodiment and Embodiment 1 is that the piston is a spring-type spherical piston as shown in Figure 3. In Figure 3, the lock structure is in the shape of a cylindrical tube, when the matching filling gun head ( After the key) is inserted in place, all the front pins 6 in the lock are squeezed and the contact surface gap between the rear pins 5 is exactly on the same line as the contact surface gap between the lock cylinder 1 and the lock body 2, forming a movable Plane; affected by the elastic force of the large spring 15, the lock core 1 and the lock body 2 produce radial relative movement, driving the ball-shaped piston bracket 14 and the ball-shaped piston 15 fixed on the lock core 1 to move together, and open the through hole 8 of the lock body , can be used for normal filling of fluid. After the fluid filling is completed, the filling gun head (key) is pulled out and pressed into the lock cylinder 1 to be in a locked state. After the filling gun head (key) is pulled out, the rear marble 5 is stuck between the lock body 2 and the lock cylinder 1 by the action of the small spring 4, limiting the relative movement of the lock body 2 and the lock cylinder 1. When the fluid is discharged, because the internal pressure of the container is greater than the external pressure, the spherical piston 15 is squeezed and floats up relative to the spherical piston bracket 14 and the lock cylinder 1, and the through hole 8 of the lock body reaches the bottom of the spherical piston 3 and then to the lock cylinder. The through hole 7 forms a passage, so whether it is locked or not, it can be used for normal discharge of fluid. When the fluid is filled, the ball-shaped piston 16 is squeezed by the fluid outside the container, and the ball-shaped piston 16 moves toward the through hole 8 of the lock body. When unlocking, due to the relative movement between the lock core 1 and the lock body 2, the spherical piston 16 is not engaged with the through hole 8 of the lock body, and the passage is opened. On the basis of the above, by making small improvements to the structure of the key, lock cylinder and lock body, it is not difficult to realize the unlocked state and the key can also be pulled out, which is convenient for some applications and will not be described again.

The above descriptions are the specific embodiments of the present invention and the technical principles used. If the changes made according to the conception of the present invention do not exceed the spirit covered by the description and accompanying drawings, they should still be Belong to the protection scope of the present invention.

Claims (4)

1. A lock device for controlling fluid, characterized in that it includes: a lock body (2), a lock cylinder (1), and a disc-type piston (3), wherein: the lock body (2) is cylindrical and can be Fixed on the entrance and exit of the fluid container, the lock body (2) is provided with a lock body through hole (8) matching the entrance and exit of the fluid container, and the lock cylinder (1) is a cylindrical shape matching the lock body (2) , the lock cylinder (1) is provided with a lock cylinder through hole (7) communicating with the lock body through hole (8), the disc piston (3) is movably connected to the bottom of the lock cylinder (1), and the bottom of the lock cylinder (1) Matching with the movable groove (12) on the disc piston (3), the disc piston (3) is provided with a piston hole (11), the lock body (2) is provided with a flat slot hole (13), and the flat slot The size of the hole (13) matches the size of the piston hole (11). A small spring (4), a rear pin (5) and a front pin (6) are arranged between the lock body (2) and the lock cylinder (1). The small spring (4) is located inside the lock body (2), and is in conflict with the rear pin (5), and the rear pin (5) is in conflict with the front pin (6), and the front pin (6) is usually acted on the lock cylinder (1) ) inside the lock cylinder through hole (7), and the pin hole of the lock core (1) is provided with steps to prevent the front pin (6) from coming out of the lock cylinder through hole (7). The lock body (2) and the lock cylinder ( 1) Flexible connection, the disc piston (3) is provided with two piston holes (11). 2. A lock device for controlling fluid according to claim 1, characterized in that when the lock is locked, the movement of the lock cylinder (1) relative to the lock body (2) is restricted, and at this time the fluid fills the container The disc-type piston (3) automatically closes the through hole (8) of the lock body under the action of external pressure, and cannot normally fill the container with fluid. 3. A lock device for controlling fluid according to claim 2, characterized in that: when the container is not filled with fluid, the disk-type piston (3) is pushed up by the pressure of the fluid in the container to open the lock body through Hole (8), whether locked or not, can discharge fluid outward. 4. A lock device for fluid control according to claim 1, characterized in that: the lock body (2), the lock cylinder (1), and the disc-type piston (3) are linked to form a lock body through hole ( 8) The open or closed state.

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