Combination lock and valve with combination lock

Abstract

The present invention provides a combination lock and a valve with a combination lock, belonging to the technical field of valves. It solves the problem of low reliability and poor anti-opening performance of valves with locking functions. It includes a lock body and a combination lock box connected to the surface of the lock body. The lock body is a cylindrical structure with a closed upper end and an open lower end. The lock body includes a petal body 1 and a petal body 2 that can be assembled into the above-mentioned cylindrical structure. A locking structure that can fix the petal body 1 and the petal body 2 and is controlled by the combination lock box is provided between the petal body 1 and the petal body 2. The inner side of the lower end of the petal body 1 and / or the petal body 2 has a shoulder. It has the advantages of high reliability, good anti-opening performance, good versatility, etc.

Description

Technical Field

[0001] The invention belongs to the technical field of valves and relates to a password lock and a valve with the password lock. Background Art

[0002] At present, valves with locking devices have been widely used in water pipes, heating pipes or gas pipes, which can facilitate the management of community property or water companies. One structure of valves with locking devices is to equip the valve with a mechanical lock, such as a flange ball valve with an opening and closing locking mechanism disclosed in patent application No. 201320250578.3, which changes the valve structure so that the mechanical lock can be hung on the valve to achieve locking. Its disadvantage is that the mechanical lock needs a key to open. When the number of lock-controlled valves installed is large and the key of each lock cannot be used universally, it is very unfavorable for centralized management.

[0003] There is also a structure of magnetic locking for valves with locking devices, such as the magnetic locking valve disclosed in patent application No. 200920313315.6, which connects a lock cap to the valve body and sets a magnetic locking mechanism between the lock cap and the valve body, uses the magnetic locking mechanism to lock the valve, and is equipped with a magnetic key that can be put on the lock cap to unlock the magnetic locking mechanism by magnetism. Compared with the use of hanging mechanical locks, one magnetic key can control valves of the same model, reducing the number of keys used and facilitating centralized management to a certain extent. However, the magnetism of the magnetic component in the valve will weaken after long-term use, resulting in low reliability, and more importantly, there are universal magnetic keys that can be used on various magnetic locking valves on the market, resulting in weak anti-opening performance.

[0004] In order to solve the problems of low reliability and poor anti-opening performance, the conventional technical means used by those skilled in the art is to use a password-type mechanical padlock instead of a mechanical lock opened with a key. It has the same good anti-opening performance and does not require a key to open. Another method is to directly integrate the structure of the password lock into the valve as a whole, such as a password locking valve disclosed in patent application No. 201320430411.5, a password gate valve disclosed in patent application No. 201020607376.6, and a password lock for a valve disclosed in patent application No. 201210282803.1. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems existing in the prior art, and to propose a password lock and a valve with a password lock, so as to solve the problems of low reliability and poor anti-opening performance of valves with locking functions.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A combination lock comprises a lock body and a combination lock box connected to the surface of the lock body, wherein the lock body is a cylindrical structure with a closed upper end and an open lower end, and is characterized in that the lock body comprises a petal body 1 and a petal body 2 which can be assembled into the above-mentioned cylindrical structure, a locking structure which can fix the petal body 1 and the petal body 2 and is controlled by the combination lock box is provided between the petal body 1 and the petal body 2, and a shoulder is provided on the inner side of the lower end of the petal body 1 and / or the petal body 2.

[0008] This password lock is mainly used to achieve the locking function on valves. Taking ordinary gate valves as an example, first remove the hand wheel connected to the gate valve stem, then place the flap body 1 against the outside of the upper end of the gate valve body and ensure that the valve stem is located on the inner side of the flap body 1, then assemble the flap body 2 with the flap body 1 and fix them through the locking structure, so that the two are combined into a lock body with a cylindrical structure with a closed upper end and an open lower end, so that the shoulder on the inner side of the lower end of the flap body 1 and / or the flap body 2 is stuck outside the upper end of the valve body. In this way, the valve stem is hidden in the lock body and cannot be operated, and the pressure cap threadedly connected to the outside of the upper end of the valve body is also located in the lock body at the same time. With the help of the pressure cap blocking the shoulder, the password lock cannot be removed from the valve body, and when the correct password cannot be entered in the password lock box, the locking structure cannot be controlled to open the lock body, thereby not only achieving the locking of the valve, but also improving the anti-opening property and the reliability of use.

[0009] Whether using a password-type mechanical padlock or integrating a password-type mechanical lock body structure on the valve, the valve structure needs to be greatly modified, which results in the locking part being unable to be separated from a special valve and directly applied to an ordinary valve, i.e., the versatility is relatively poor. However, this password lock is neither directly integrated on the valve nor requires a pair of matching lock holes on the valve like a padlock. Instead, the valve stem is hidden by simply wrapping it around the upper end of the valve body through splicing, and the password lock can be prevented from being directly removed from the valve by simply blocking the shoulder with the help of the structure on the valve, thereby greatly improving the versatility of this password lock.

[0010] In the above-mentioned combination lock, the shoulder is arc-shaped.

[0011] When the connected valve is a gate valve, the arc shape can form a larger blocking area between the shoulder and the pressure cap on the gate valve, so that the combination lock can be stably connected to the valve, further improving the anti-opening performance. When the connected valve is a ball valve, the valve stem of the valve extends out of the upper end of the valve body of the valve and is connected to a handle, and a limit block is provided outside the upper end of the valve body to limit the rotation angle of the handle. The shoulder is set to an arc shape, and the arc shape allows the shoulder to form an effective match with the limit block outside the upper end of the ball valve body, so that the combination lock can also be connected to an ordinary ball valve to realize the locking function, further improving the versatility of the combination lock. In addition to ordinary gate valves or ball valves, other ordinary valves can also be locked with the combination lock as long as they have a structure that can cooperate with the arc-shaped shoulder.

[0012] In the above-mentioned combination lock, the inner sides of the lower ends of the first and second petal bodies are provided with shoulders, and when the first and second petal bodies form a lock body, the two shoulders can be assembled into a circular ring structure.

[0013] The inner shoulder of the lower end of the valve body and the inner shoulder of the second lower end of the valve body are assembled into a ring when the lock body is formed, so that the connection between the combination lock and the valve can be more stable and the anti-opening effect can be better.

[0014] In the above-mentioned combination lock, the petal body 1 and the petal body 2 are both in the shape of arc plates, and the upper surface of the petal body 1 is fixedly connected with a circular top plate, or the upper inner sides of the petal body 1 and the upper inner sides of the petal body 2 are fixedly connected with semicircular baffles.

[0015] When the second flap body is assembled with the first flap body and fixed to form a lock body through a locking structure, the lock body can be made into a cylindrical structure with a closed upper end and an open lower end by a circular top plate or a combination of two semicircular baffles fixed to the upper surface of the first flap body, thereby hiding the exposed valve stem to achieve locking and improve the anti-opening performance. This form ensures the normal locking function and enables the combination lock to be used on ordinary valves.

[0016] In the above-mentioned combination lock, the petal body 1 and the petal body 2 are both integral structures, or the petal body 1 includes the main body 1 and the connecting body 1 fixedly connected to the lower end of the main body, and the petal body 2 includes the main body 2 and the connecting body 2 fixedly connected to the lower end of the main body 2, and the shoulder is arranged on the connecting body 1 and the connecting body 2.

[0017] The reason why valve body 1 and valve body 2 are set as a split structure is mainly because valves with the same structure have various specifications, and the combination lock mainly relies on the shoulder to ensure that it cannot be directly removed from the valve body. Therefore, it means that the size of main body 1 and main body 2 is not limited by the valve specifications, that is, main body 1 and main body 2 can be directly mass-produced at one time, thereby making the company's production simpler.

[0018] In the above-mentioned combination lock, one side of the flap body 1 is hinged to one side of the flap body 2, and the locking structure is located between the flap body 1 and the other side of the flap body 2. This structure makes the opening and closing of the lock body more convenient.

[0019] In the above-mentioned combination lock, the locking structure includes a lock tongue slidably arranged in petal body one and a bayonet arranged on petal body two. The side of the lock tongue has a lock hook extending out of petal body one. The lock tongue can hook the lock hook on the side wall of the bayonet under the action of its own elastic force or a supporting spring. One end of the lock tongue passes through the outside of the combination lock box and the combination lock box can limit the sliding of the lock tongue when it is locked.

[0020] The lock tongue hooks the lock hook on the side wall of the bayonet under the action of its own elastic force or a supporting spring, and the combination lock box restricts the sliding of the lock tongue when locked, so that the lock hook cannot be disengaged from the bayonet by pressing the lock tongue, thereby achieving locking. When the combination lock box is unlocked, the sliding of the lock tongue is no longer restricted, so the manager can disengage the lock hook from the bayonet by pressing the lock tongue, so that the lock body can be opened and removed from the valve body.

[0021] In the above-mentioned combination lock, the combination lock box includes an outer shell and a lock core arranged in the outer shell, the lock core includes a rotatable locking wheel, and a movable actuator is arranged between the locking wheel and the lock tongue. The actuator has a protrusion, and the outer peripheral wall of the locking wheel can lock the lock tongue by pressing the actuator against the protrusion. The outer peripheral wall of the locking wheel is provided with a notch for the protrusion to be embedded. The actuator always has a tendency to move toward the locking wheel under the action of its own elastic force or an elastic member.

[0022] The outer wall of the locking wheel contacts the protrusion and presses against the actuator to lock the lock tongue, so that the lock tongue cannot be operated and the lock body cannot be opened, thereby realizing the locking function. When the locking wheel rotates until the notch is opposite to the protrusion, the actuator moves toward the locking wheel under the action of its own elastic force or the elastic member and causes the protrusion to embed into the notch. The actuator releases the restriction on the lock tongue, so that the manager can operate the lock tongue to open the lock body. This combination lock uses the same locking principle as a conventional mechanical lock, so it also has the same anti-opening property. In addition, the actuator and the locking wheel are both arranged in the combination lock box and have nothing to do with the valve, so that this combination lock can be used on ordinary valves.

[0023] In the above-mentioned combination lock, the shell includes the above-mentioned circular top plate and a box cover connected to the circular top plate, the actuator is a V-shaped plate, the protrusion is the sharp corner on the actuator, the lower end of the actuator is connected to the circular top plate so that the upper end of the actuator can swing, and when the outer peripheral wall of the locking wheel contacts the protrusion, the upper end of the actuator can act on the lock tongue in the horizontal direction.

[0024] The housing includes a circular top plate and a box cover connected to the circular top plate. The circular top plate is fixedly connected to the upper end of the petal body 1, which means that the lock tongue is slidably arranged in the vertical direction. Then, through the positioning method of the above-mentioned actuator on the circular top plate, the upper end of the actuator can act on the lock tongue in the horizontal direction when the protrusion contacts the outer peripheral wall of the locking wheel, so that the lock tongue cannot slide downward to disengage the lock hook from the bayonet. By directly acting in the horizontal direction on the lock tongue slidably arranged in the vertical direction, the lock tongue can be firmly restricted from sliding downward when locking, thereby further improving the anti-opening performance.

[0025] In the above-mentioned combination lock, as another technical solution, the combination lock box is fixed to the outer side of the petal body and the combination lock box partially extends out of the petal body. The combination lock box includes an outer shell and a lock core arranged in the outer shell. The lock core includes a rotatable locking wheel. A movable actuator is arranged between the locking wheel and the bottom wall of the outer shell. The actuator is in the shape of a plate. The locking structure includes a convex plate vertically fixed to the actuator on the bottom wall surface of the outer shell and a locking groove arranged on the outer side of the second petal body. A protrusion is provided on the surface of the actuator facing the locking wheel. The outer peripheral wall of the locking wheel can support the actuator through the protrusion so that the convex plate is inserted into the locking groove. The outer peripheral wall of the locking wheel is provided with a notch, and a return spring is provided between the bottom wall of the outer shell and the actuator.

[0026] When the locking wheel is rotated to make the protrusion and the notch staggered, the outer wall of the locking wheel pushes the actuator to compress the return spring, so that the protruding plate passes through the bottom wall of the shell and is inserted into the locking groove to achieve locking. When the locking wheel is rotated to make the protrusion fit into the notch, the protruding plate automatically comes out of the locking groove to achieve unlocking. This solution also enables the combination lock to be used in conjunction with ordinary valves.

[0027] A valve with a password lock comprises a valve body, a valve stem extending out of the upper end of the valve body and a password lock connected to the upper end of the valve body, the upper end side of the valve body is provided with a convex portion, the password lock comprises a lock body and a password lock box connected to the surface of the lock body, the lock body is a cylindrical structure with a closed upper end and an open lower end, the valve stem and the convex portion are both located in the lock body, and is characterized in that the lock body comprises a petal body 1 and a petal body 2 which can be assembled into the above-mentioned cylindrical structure, a locking structure which can fix the petal body 1 and the petal body 2 and is controlled by the password lock box is provided between the petal body 1 and the petal body 2, the inner side of the lower end of the petal body 1 and / or the petal body 2 has a shoulder, and the shoulder is located below the convex portion.

[0028] Compared with the prior art, the combination lock and the valve with combination lock have the following advantages:

[0029] 1. After the combination lock is connected to the valve body, the valve stem can be well hidden to lock the valve, and there is no defect of being able to be opened by a master key or weakened magnetism, which well realizes the anti-opening property and reliability of use;

[0030] 2. The valve stem is hidden only by wrapping it outside the upper end of the valve body in a splicing manner, and the combination lock cannot be directly removed from the valve by blocking the shoulder with the help of the structure provided on the valve, thereby greatly improving the versatility of the combination lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the first embodiment of the password lock.

[0032] Figure 2 It is a schematic diagram of the first embodiment of the password lock when it is opened.

[0033] Figure 3 It is a schematic diagram from another angle when the first embodiment of the password lock is opened.

[0034] Figure 4 It is a schematic diagram of the lock box in the first embodiment of the password lock.

[0035] Figure 5 It is a schematic diagram between the actuator and the circular top plate in the first embodiment of the password lock.

[0036] Figure 6 It is a cross-sectional view of the locking wheel, the actuator and the lock tongue when locked in the first embodiment of the password lock.

[0037] Figure 7 It is a cross-sectional view of the locking wheel, the actuator and the lock tongue when unlocking in the first embodiment of the password lock.

[0038] Figure 8 It is a schematic diagram of the lock tongue in the first embodiment of the password lock.

[0039] Fig. 9 It is a schematic diagram of a common gate valve.

[0040] Fig.10 It is a schematic diagram of a valve with a password lock in the first embodiment.

[0041] Fig.11 yes Fig.10 Schematic diagram of the combination lock after opening.

[0042] In the figure, 1, lock body; 1a, flap body 1; 1a1, main body 1; 1a2, connecting body 1; 1b, flap body 2; 1b1, main body 2; 1b11, bayonet; 1b2, connecting body 2; 1c, shoulder; 2, password lock box; 3, lock tongue; 3a, lock hook; 3b, pressing part; 3c, block; 3c1, concave cavity; 4, supporting spring; 5, shell; 5a, round top plate; 5a1, support; 5a2, convex Block group; 5a3, guide bracket; 5a4, stopper; 5b, box cover; 6, lock core; 7, locking wheel; 7a, notch; 8, actuator; 8a, protrusion; 9, opening and closing torsion spring; 10, support shaft; 11, digital wheel; 12, limit spring; 13, slider; 13a, plug rod; 13b, baffle; 14, return spring; 15, valve body; 16, valve stem; 17, protrusion; 18, handwheel; 19, nut. DETAILED DESCRIPTION

[0043] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0044] Embodiment 1

[0045] like Figure 1 , Figure 2 and Figure 3 As shown, the combination lock comprises a lock body 1 and a combination lock box 2 capable of controlling unlocking. The lock body 1 is a cylindrical structure with a closed upper end and an open lower end. The lock body 1 comprises a petal body 1a and a petal body 1b that can be assembled into a cylindrical structure. A locking structure capable of fixing the two and being controlled by the combination lock box 2 is arranged between the petal body 1a and the petal body 1b. The petal body 1a and the petal body 1b are both in the shape of arc plates. The petal body 1a and the petal body 1b are hinged on one side. The locking structure is arranged between the petal body 1a and the other side of the petal body 1b. The inner side of the lower end of the petal body 1a and / or the petal body 1b has a stop shoulder 1c, and the stop shoulder 1c is arc-shaped. In this embodiment, the petal body 1a and the petal body 2 1b are specifically semicircular, and the inner side of the lower end of the petal body 1a and the inner side of the lower end of the petal body 2 1b both have a shoulder 1c, and when the petal body 1a and the petal body 2 1b form the lock body 1, the two shoulder 1c can be assembled into a circular ring structure. The hinged joint of the petal body 1a and the petal body 2 1b is matched in a concave-convex manner, and then a pin is used to pass through the concave-convex matching part to form a hinge, and an opening and closing torsion spring 9 is sleeved on the pin. Under the elastic force of the opening and closing torsion spring 9, the petal body 2 1b always has a tendency to keep the lock body 1 in an open state.

[0046] The petal body 1a can be made as a whole or in parts and then fixed. The form of the petal body 2 1b needs to correspond to the petal body 1 1a. Figure 2 and Figure 3As shown, the petal body 1a includes a main body 1a1 and a connecting body 1a2 fixedly connected to the lower end of the main body 1a1, and the petal body 2 1b includes a main body 1b1 and a connecting body 1b2 fixedly connected to the lower end of the main body 1b1. The main body 1a1 and the main body 1b1 are hinged, and shoulders 1c are provided on the connecting body 1a2 and the connecting body 2 1b2.

[0047] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, further, the password lock box 2 is fixedly connected to the upper end of the flap body 1a, and the password lock box 2 includes a shell 5 and a lock core 6 arranged in the shell 5, wherein the shell 5 includes a circular top plate 5a and a box cover 5b connected to the circular top plate 5a, and the circular top plate 5a and the box cover 5b can be snap-fitted or screwed or a combination of the two, and the flap body 1a and the circular top plate 5a can be an integrated structure or fixed by glue or welding. The upper surface of the circular top plate 5a has two relatively arranged supports 5a1, and the lock core 6 includes a support shaft 10 arranged on the two supports 5a1 and a locking wheel 7 sleeved on the support shaft 10, and the locking wheel 7 is connected with a number wheel 11, and a meshing tooth is provided between the number wheel 11 and the locking wheel 7 so that the two are circumferentially fixed. Among them, the number of the locking wheel 7 and the number wheel 11 are both three, and each number wheel 11 is partially located at the upper surface of the box cover 5b, so that the user can turn the number wheel 11 outside the box cover 5b to unlock. A limiting ring is provided at one end of the support shaft 10, and a limiting spring 12 is provided at the other end of the support shaft 10. One end of the limiting spring 12 abuts against the locking wheel 7 near it, and the other end of the limiting spring 12 abuts against the corresponding support 5a1. The three locking wheels 7 are positioned along the axial direction by the action of the limiting spring 12. This combination lock also has the function of changing the password, and the changing method is the same as that of the traditional combination lock, which will not be repeated here.

[0048] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the locking structure includes a lock tongue 3 slidably arranged in the petal body 1a along the vertical direction and a bayonet 1b11 arranged on the petal body 1b. The bayonet 1b11 is specifically located on the main body 1b1. The lock tongue 3 is correspondingly provided with a lock hook 3a extending out of the petal body 1a and arranged upward. The main body 1a1 on the petal body 1a is provided with a supporting spring 4 acting upward on the lock tongue 3 so that the lock hook 3a can hook on the side wall of the bayonet 1b11. One end of the lock tongue 3 passes through the outside of the combination lock box 2 and the combination lock box 2 can limit the sliding of the lock tongue 3 when locked. Specifically, the locking wheel 7 partially extends out of the corresponding side of the number wheel 11, and a movable actuator 8 is arranged between the locking wheel 7 and the lock tongue 3. The actuator 8 has a protrusion 8a, and the protrusion 8a and the outer peripheral wall of the locking wheel 7 extending out of the side of the number wheel 11 can contact with the protrusion 8a and lock the lock tongue 3 against the actuator 8. The outer peripheral wall of the locking wheel 7 is provided with a notch 7a for the protrusion 8a to be embedded. The actuator 8 always has a tendency to move toward the locking wheel 7 under the action of its own elastic force or an elastic member. The actuator 8 is a V-shaped plate, and the protrusion 8a is a sharp corner on the actuator 8. The lower end of the actuator 8 is connected to the circular top plate 5a so that the upper end of the actuator 8 can swing, and when the outer peripheral wall of the locking wheel 7 contacts with the protrusion 8a, the upper end of the actuator 8 can act on the lock tongue 3 in the horizontal direction. Specifically, the actuator 8 is provided with a clearance groove for the three number wheels 11 to partially pass through, and the circular top plate 5a is provided with two pairs of protrusion groups 5a2. The two sides of the lower end of the actuator 8 are provided with corresponding protrusions, and the two protrusions are respectively inserted into the two pairs of protrusion groups 5a2 from above. The two protrusions can move in the pair of protrusion groups 5a2 to enable the actuator 8 to swing.

[0049] like Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the upper end of the lock tongue 3 passes through the password lock box 2, and the upper end of the lock tongue 3 has a block-shaped pressing portion 3b. A limiting mechanism is provided between the upper end of the actuator 8 and the lock tongue 3, which can limit the lock tongue 3 from moving downward when the protrusion 8a contacts the outer peripheral surface of the locking wheel 7, wherein the limiting mechanism specifically acts on the lock tongue 3 in the horizontal direction. The lock tongue 3 located in the lock box 2 has a block 3c, and the circular top plate 5a has a guide bracket 5a3, and the block 3c is stuck on the inner side of the guide bracket 5a3. The block 3c has a concave cavity 3c1 that penetrates the lower end surface of the block 3c and the side wall of the block 3c facing the guide bracket 5a3, and a slider 13 is slidably arranged in the concave cavity 3c1. The matching mode of the slider 13 and the concave cavity 3c1 can be to open a plurality of slide grooves on the inner wall of the concave cavity 3c1, and to set a corresponding slide bar on the slider 13, and the slide bar is set in the slide groove to slide. The slider 13 is fixedly connected with an insertion rod 13a on the side facing away from the guide bracket 5a3. The elastic member is a reset spring 14 sleeved on the insertion rod 13a. The insertion rod 13a is inserted into the inner wall of the cavity 3c1. Under the elastic force of the reset spring 14, the slider 13 partially extends out of the cavity 3c1 and abuts against the upper end of the actuator 8. The elastic force of the reset spring 14 acts on the actuator 8 through the slider 13, so that the actuator 8 always has a swinging tendency. The limiting mechanism includes a baffle 13b fixedly connected to the lower end surface of the slider 13 and a stopper 5a4 arranged on the upper surface of the circular top plate 5a. The baffle 13b is located between a side wall of the guide bracket 5a3 and the stopper 5a4. The lower end surface of the baffle 13b is higher than the upper surface of the circular top plate 5a under the elastic force of the support spring 4, and a side wall of the guide bracket 5a3 is higher than the lower end surface of the baffle 13b. When the protrusion 8a contacts the outer peripheral wall of the locking wheel 7, the actuator 8 can push the slider 13 to slide until the baffle 13b is located above the stopper 5a4.

[0050] The working principle of this password lock is as follows: Figure 7 As shown, when each number wheel 11 rotates to the correct number, the protrusion 8a on the actuator 8 is embedded in the notch 7a on each locking wheel 7. At this time, the slider 13 slides under the elastic force of the reset spring 14 until the baffle 13b is located between the side wall of the guide bracket 5a3 and the stopper 5a4, that is, the lock tongue 3 is in an operable state, and the flap body 2 1b is swung around the hinge point to be assembled with the flap body 1 1a. Each lock hook 3a is first squeezed to make the lock tongue 3 overcome the support spring 4 and slide downward, and then reset upward to hook on each bayonet 1b11, so that the flap body 1 1a and the flap body 2 1b are fixed to form the lock body 1. Next, the number wheels 11 are disordered, as shown in FIG. Figure 6As shown, each notch 7a is staggered with the protrusion 8a so that the outer peripheral wall of each locking wheel 7 contacts the protrusion 8a. At this time, the actuator 8 will swing and push the slider 13 inward until the baffle 13b is located above the block 5a4. In this way, the downward sliding of the lock tongue 3 is blocked by the block 5a4, so that the lock hook 3a and the bayonet 1b11 cannot be separated, thereby achieving locking. When unlocking, the number wheels 11 are rotated again until each notch 7a is opposite to the protrusion 8a, and the protrusion 8a is re-embedded in each notch 7a to slide until the baffle 13b is in the initial state. In this way, the lock tongue 3 is in an operable state again, and then the pressing part 3b only needs to be pressed to separate the flap body 1a from the flap body 2 1b to achieve unlocking.

[0051] like Fig.10 and Fig.11 As shown, the valve with a password lock comprises a valve body 15, a valve stem 16 extending from the upper end of the valve body 15 and the password lock in this embodiment. The password lock is connected to the upper end of the valve body 15. A convex portion 17 is provided on the side of the upper end of the valve body 15. The valve stem 16 and the convex portion 17 are both located in the lock body 1, and the stop shoulder 1c is located below the convex portion 17. The valve can be an ordinary gate valve or an ordinary ball valve. When the valve is an ordinary gate valve, the ordinary gate valve is as follows Fig. 9 The convex part 17 shown is a pressure cap threadedly connected to the upper end of the valve body 15. The upper end of the valve stem 16 of the common gate valve is also connected to a hand wheel 18 and a nut 19 threadedly connected to the upper end of the valve stem 16 and fixing the hand wheel 18 and the valve stem 16 axially. It is only necessary to remove the nut 19 and the hand wheel 18, and then wrap the flap body 1a outside the upper end of the valve body 15 by clamping the shoulder 1c at its lower end under the convex part 17. Finally, the flap body 1b is fixed to the flap body 1a to form the lock body 1. In this way, the shoulder 1c at the lower end of the flap body 1b is naturally clamped under the convex part 17, and the upper end of the valve body 15 and the valve stem 16 are naturally located in the lock body 1. In this state, only by rotating each number wheel 11 to the correct number can the lock body 1 be reopened to remove the combination lock from the valve body 15. After the combination lock is removed, the user only needs to put the hand wheel 18 on the valve stem 16 again or use some conventional tools such as wrenches to operate the valve. When the valve is an ordinary ball valve, the upper end of the valve stem 16 is connected to a handle and a nut 19 which is threadedly connected to the upper end of the valve stem 16 and axially fixes the handle and the valve stem 16. The protrusion 17 is a limit block for limiting the rotation angle of the handle. It is also only necessary to remove the nut 19 and the handle, and then the combination lock can be connected to the ordinary ball valve in the same way as above.

[0052] The valve with a password lock uses the shoulder 1c on the password lock to cooperate with the convex portion 17 on the upper end of the valve body 15 to achieve locking. Since conventional valves all have a structure corresponding to the convex portion 17, it means that there is no need to change the structure of the valve body 15 when achieving locking. The valve body 15 can be connected to the password lock by simply removing the handle or handwheel 18 on the valve that is used to connect to the valve stem 16. After the password lock is removed, the valve can be operated using the handle or handwheel 18 of the valve or some conventional tools such as wrenches.

[0053] Embodiment 2

[0054] The structure and principle of this embodiment are basically the same as those of the first embodiment, except that: in this embodiment, the limiting mechanism includes a slot provided on the block 3c and a block provided on the upper end of the actuator 8 along the horizontal protrusion, and when the locking wheel 7 rotates until the outer peripheral wall abuts against the protrusion 8a, the block can be inserted into the slot to fix the lock tongue 3. The lower end of the actuator 8 is hinged on the circular top plate 5a, and the elastic member is an unlocking torsion spring provided at the hinge position of the actuator 8 and the circular top plate 5a.

[0055] Embodiment 3

[0056] A semicircular baffle 13b is fixedly connected to the inner side of the upper end of the petal body 1a and the inner side of the upper end of the petal body 2 1b. The password lock box 2 is fixed to the outer side of the petal body 1a and a part of the password lock box 2 extends out of the petal body 1a. The password lock box 2 includes a shell 5 and a lock core 6 arranged in the shell 5. The lock core 6 includes a rotatable locking wheel 7. A movable actuator 8 is arranged between the locking wheel 7 and the bottom wall of the shell 5. The actuator 8 is plate-shaped. The locking structure includes a convex plate vertically fixed to the actuator 8 on the bottom wall surface of the shell 5 and a locking groove arranged on the outer side of the petal body 2 1b. A protrusion 8a is provided on the surface of the actuator 8 facing the locking wheel 7. The outer peripheral wall of the locking wheel 7 can support the actuator 8 through the protrusion 8a so that the protrusion is inserted into the locking groove. The outer peripheral wall of the locking wheel 7 is provided with a notch 7a, and a return spring is provided between the bottom wall of the shell 5 and the actuator 8.

[0057] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A combination lock, comprising a lock body (1) and a combination lock box (2) connected to the surface of the lock body (1), wherein the lock body (1) is a cylindrical structure with a closed upper end and an open lower end, and is characterized in that: The lock body (1) comprises a petal body 1 (1a) and a petal body 2 (1b) which can be assembled into the above-mentioned cylindrical structure, a locking structure which can fix the petal body 1 (1a) and the petal body 2 (1b) and is controlled by the password lock box (2) is provided between the petal body 1 (1a) and the petal body 2 (1b), and a stopper (1c) is provided on the inner side of the lower end of the petal body 1 (1a) and / or the petal body 2 (1b); the locking structure comprises a lock tongue (3) arranged in the petal body 1 (1a) and a bayonet (1b11) arranged on the petal body 2 (1b), a lock hook (3a) extending out of the petal body 1 (1a) is provided on the side of the lock tongue (3), the password lock box (2) comprises a shell (5) and a lock core (6) arranged in the shell (5), the lock core (6) comprises a rotatable locking wheel (7), a movable actuator (8) is provided between the locking wheel (7) and the lock tongue (3), the actuator (8) has a protrusion (8a), and the outer peripheral wall of the locking wheel (7) is provided with The notch (7a) can be inserted into the protrusion (8a), and the actuator (8) always has a tendency to move toward the locking wheel (7) under the action of an elastic member. The password lock box (2) is fixed to the top of the lock body (1), and the lock tongue (3) is vertically strip-shaped. The lower end of the lock tongue (3) is abutted against a support spring (14), and the upper end of the lock tongue (3) passes out of the outer shell (5). A limiting mechanism is provided between the upper end of the actuator (8) and the lock tongue (3), which can limit the downward movement of the lock tongue (3) when the protrusion (8a) contacts the outer peripheral surface of the locking wheel (7). The limiting mechanism acts on the lock tongue (3) in the horizontal direction. When the outer peripheral wall of the locking wheel (7) contacts the protrusion (8a), the actuator (8) can act on the lock tongue (3) in the horizontal direction. When the protrusion (8a) on the actuator (8) is inserted into the notch (7a) on each locking wheel (7), the lock tongue (3) is in an operable state.

2. The combination lock according to claim 1, characterized in that: The shoulder (1c) is arc-shaped.

3. The combination lock according to claim 2, characterized in that: The inner sides of the lower ends of the petal body one (1a) and the petal body two (1b) are both provided with a stop shoulder (1c), and when the petal body one (1a) and the petal body two (1b) form a lock body (1), the two stop shoulders (1c) can be assembled into a circular ring structure.

4. The combination lock according to claim 3, characterized in that: The petal body one (1a) and the petal body two (1b) are both in the shape of circular arc plates, and the upper surface of the petal body one (1a) is fixedly connected to a circular top plate (5a), or the upper inner sides of the petal body one (1a) and the upper inner sides of the petal body two (1b) are both fixedly connected to semicircular baffles.

5. The combination lock according to claim 4, characterized in that: The petal body 1 (1a) and the petal body 2 (1b) are both integral structures, or the petal body 1 (1a) includes a main body 1 (1a1) and a connecting body 1 (1a2) fixedly connected to the lower end of the main body 1 (1a1), and the petal body 2 (1b) includes a main body 2 (1b1) and a connecting body 2 (1b2) fixedly connected to the lower end of the main body 2 (1b1), and the shoulder (1c) is provided on the connecting body 1 (1a2) and the connecting body 2 (1b2).

6. The combination lock according to claim 4, characterized in that: One side of the flap body 1 (1a) is hinged to one side of the flap body 2 (1b), and the locking structure is located between the other side of the flap body 1 (1a) and the other side of the flap body 2 (1b).

7. The combination lock according to claim 4, characterized in that: The housing (5) comprises the circular top plate (5a) and a box cover (5b) connected to the circular top plate (5a); the actuator (8) is a V-shaped plate; the protrusion (8a) is a sharp corner on the actuator (8); the lower end of the actuator (8) is connected to the circular top plate (5a) so that the upper end of the actuator (8) can swing.

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