Locking ball valve

Abstract

The utility model provides a locking ball valve, and belongs to the technical field of valves. The anti-theft lock solves the problem that the anti-theft lock is easy to be stolen due to insufficient anti-theft reliability. The locking ball valve comprises a valve body and a valve rod vertically arranged in the valve body, a mounting hole is horizontally formed in the side portion of the valve body, a lock is in threaded connection with the interior of the mounting hole, the front end of the lock is inserted into the valve rod, a connecting hole is formed in the rear end of the lock, the rear end of the lock is sleeved with a shielding piece, and the shielding piece can rotate relative to the lock. An anti-disengaging structure capable of preventing the shielding piece from disengaging from the rear end of the lock head is arranged between the shielding piece and the lock head, the rear end of the shielding piece is provided with an annular shielding part, and the shielding part is located behind the lock head. The anti-theft lock has the advantages of being high in anti-theft reliability, not prone to being stolen and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves and relates to a locking ball valve. Background Art

[0002] In order to facilitate the management of residents' water or gas use, a ball valve with a locking function is usually installed on the water supply branch pipe or gas supply branch pipe before entering the house. When the user owes fees, the management personnel will close the ball valve and lock it to cut off the water or gas supply. For example, the internal thread lockable ball valve disclosed in the patent application No. 201120440716.5 includes a valve body, a valve seat, a ball valve core installed in the valve seat, a valve stem linked to the ball valve core, and a handle installed on the valve stem. A positioning block is fixed on the valve stem, and a notch is provided on one side of the positioning block for the end of the locking screw to be inserted. The locking screw with an axis perpendicular to the valve stem cooperates with the valve body thread, and the tail of the locking screw is provided with a lock hole for the special key to be inserted. The end of the locking screw is inserted into the notch on the side of the positioning block, so that the valve is locked in a closed state and cannot be opened at will by the user. When the valve needs to be opened, the management personnel inserts a special key into the lock hole at the tail of the locking screw and then rotates it, so that the locking screw moves along the thread and separates from the positioning block, so that the valve is no longer locked.

[0003] However, the above-mentioned internal thread lockable ball valve also has some shortcomings: it can be seen from the drawings in its specification that the locking screw is threadedly connected to a hole in the valve body, and even in the locked state, the tail position of the locking screw is exposed, which means that if others use pliers to clamp the tail of the locking screw, they can also directly rotate the locking screw, so there is a problem of insufficient reliability in anti-theft opening. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes a locking ball valve to solve the problem that the valve is easily opened due to insufficient reliability in anti-theft opening.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A locking ball valve comprises a valve body and a valve stem vertically arranged in the valve body, wherein a mounting hole is horizontally arranged along the side of the valve body, a locking head is threadedly connected to the mounting hole, the front end of the locking head is inserted into the valve stem, and the rear end of the locking head is provided with a connecting hole, and is characterized in that a shielding member is externally connected to the rear end of the locking head, the shielding member can rotate relative to the locking head, an anti-slip structure is provided between the shielding member and the locking head, and the rear end of the shielding member has an annular shielding portion, and the shielding portion is located behind the locking head.

[0007] Similar to the existing ones, when the locking ball valve is in the closed state, the front end of the lock is inserted into the valve stem to lock the valve stem, so that the user cannot operate the valve stem to open the valve. Only when the manager inserts a special unlocking key into the connecting hole at the rear end of the lock and rotates the lock can the valve stem be unlocked. The locking ball valve is provided with a shielding member on the outer surface of the rear end of the lock. The rear end of the shielding member has an annular shielding portion and the shielding portion is located behind the lock. This means that the shielding member blocks the position of the rear end of the lock that can be clamped by needle-nosed pliers, so that the user can no longer operate the lock by clamping the rear end of the lock with needle-nosed pliers. Moreover, the shielding member is sleeved outside the rear end of the lock, and the shielding member can rotate freely relative to the lock. In this way, even if the user clamps the shielding member with needle-nosed pliers to rotate it, the lock will still not be rotated. As a result, the anti-theft reliability of the locking ball valve in the locked state is greatly improved, that is, the difficulty of the locking ball valve being stolen is increased.

[0008] In the above-mentioned locking ball valve, the shielding member has a ring-shaped main body, and the anti-slip structure includes an annular flange arranged on the inner side of the front end of the main body and an annular blocking portion arranged on the outer side of the rear end of the lock head, and the annular blocking portion is located behind the annular flange.

[0009] The annular blocking portion is located behind the annular flange, so that the annular blocking portion and the annular flange can abut against each other to prevent the shielding member from falling off from the rear end of the lock head, so that the locking ball valve can use the shielding member to protect the rear end of the lock head to prevent others from clamping the rear end of the lock head with needle-nosed pliers to operate it.

[0010] In the above-mentioned locking ball valve, the outer side of the annular flange has a guide surface 1, and the outer side of the annular blocking part has a guide surface 2. Both the guide surface 1 and the guide surface 2 are conical surfaces. The inner diameter of the guide surface 1 gradually decreases from front to back, and the outer diameter of the guide surface 2 gradually decreases from front to back.

[0011] The arrangement of the guide surface 1 and the guide surface 2 can provide a guide for the installation of the shielding member at the rear end of the lock head, so that the annular flange can smoothly squeeze through the annular blocking portion to the rear thereof to form an anti-slip structure.

[0012] In the above-mentioned locking ball valve, as another technical solution, the shielding member has a ring-shaped main body, and the anti-slip structure includes an annular flange arranged on the inner side of the front end of the main body and a retaining spring fixed to the outer side of the rear end of the lock head, and the retaining spring is located behind the annular flange.

[0013] The retaining spring is located behind the annular flange, so that the retaining spring and the annular flange can abut against each other to prevent the shielding member from falling off from the rear end of the lock head, so that the locking ball valve can use the shielding member to protect the rear end of the lock head to prevent others from clamping the rear end of the lock head with needle-nosed pliers to operate it.

[0014] In the above-mentioned locking ball valve, the main body is clearance-matched with the hole wall of the mounting hole.

[0015] The clearance between the main body and the hole wall of the mounting hole is matched, which means that others cannot use sharp tools to insert between the main body and the hole wall of the mounting hole to pry off the shielding member.

[0016] In the above-mentioned locking ball valve, the shielding member is a metal member.

[0017] The shielding piece is made of metal and has hardness, so it can prevent being violently destroyed.

[0018] In the above-mentioned locking ball valve, a limit ring is also threadedly connected in the installation hole, and the locking head passes through the limit ring. The outer side of the locking head has an annular boss, and the boss is located in front of the limit ring.

[0019] The setting of the stop ring and the boss can prevent the lock head from being rotated too much and falling out of the installation hole directly. Of course, in order to ensure the normal movement and unlocking of the lock head, it is actually only necessary to ensure that the distance between the boss and the stop ring is greater than the distance between the inner end of the lock head and the side of the valve stem.

[0020] In the above-mentioned locking ball valve, the valve body has a cylindrical neck and a cylindrical mounting portion protruding from the outside of the neck, the neck has an inner hole, the valve stem is inserted into the neck, the mounting hole is located in the mounting portion, a socket is provided on the side of the valve stem, and a transition hole is provided at the connection position between the neck and the mounting portion to connect the inner hole of the neck with the mounting hole. When the valve stem is in a state of closing the ball valve, the socket and the transition hole are directly connected, and the front end of the lock head has a locking portion, which is inserted into the socket through the transition hole.

[0021] Compared with the prior art, the locking ball valve of the present invention has a shielding member connected to the outer surface of the rear end of the lock head, and the rear end of the shielding member has an annular shielding portion and the shielding portion is located behind the lock head. This means that the shielding member blocks the position of the rear end of the lock head that can be clamped by needle-nosed pliers, so that the user can no longer operate the lock head by clamping the needle-nosed pliers on the rear end of the lock head. Moreover, the shielding member and the rear end of the lock head are in a socket-connected relationship, that is, the shielding member can rotate freely relative to the lock head. In this way, the user can neither operate the lock head by clamping the needle-nosed pliers on the rear end of the lock head, nor operate the lock head by clamping the needle-nosed pliers outside the shielding member. This greatly improves the anti-theft reliability of the locking ball valve in the locked state, that is, it increases the difficulty of stealing the locking ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of the locking ball valve when it is in a locked state.

[0023] Figure 2 yes Figure 1 An enlarged view of the rear end of the middle lock and the shielding member.

[0024] Figure 3 It is a three-dimensional schematic diagram of the locking ball valve.

[0025] Figure 4 It is a three-dimensional schematic diagram of the unlocking key.

[0026] Figure 5 is a cross-sectional view of the unlocking key.

[0027] Figure 6 yes Figure 5 Sectional view along AA direction.

[0028] In the figure, 1, valve body; 1a, neck; 1b, mounting part; 1b1, mounting hole; 2, valve stem; 2a, jack; 3, ball core; 4, handle; 5, lock head; 5a, connecting hole; 5b, locking part; 5c, annular blocking part; 5c1, guide surface 2; 5d, boss; 6, shielding member; 6a, shielding part; 6b, main body; 6c, annular flange; 6c1, guide surface 1; 7, limiting ring; 8, unlocking key; 9, operating rod; 9a, matching section; 9b, limiting plate; 10, outer sleeve; 10a, clearance gap; 11, connecting member; 11a, connecting part; 11b, limiting part; 12, handwheel. DETAILED DESCRIPTION

[0029] 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.

[0030] Embodiment 1

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, the locking ball valve comprises a valve body 1, a valve stem 2 vertically arranged in the valve body 1, and a ball core 3 located in the valve body 1 and connected to the lower end of the valve stem 2. The upper end of the valve stem 2 extends out of the valve body 1 and is fixedly connected to a handle 4. A mounting hole 1b1 is horizontally arranged on the side of the valve body 1, and a lock head 5 is threadedly connected to the mounting hole 1b1. The front end of the lock head 5 is inserted into the valve stem 2 to keep the valve stem 2 in a state of closing the valve, and the rear end of the lock head 5 has a connecting hole 5a. Among them, the valve body 1 has a cylindrical neck 1a and a cylindrical mounting portion 1b protruding from the outside of the neck 1a. The neck 1a has an inner hole. The valve stem 2 is inserted into the neck 1a. The mounting hole 1b1 is located in the mounting portion 1b. The side of the valve stem 2 is provided with a plug hole 2a. The connecting position of the neck 1a and the mounting portion 1b has a transition hole connecting the inner hole of the neck 1a with the mounting hole 1b1. When the valve stem 2 is in a state of closing the ball valve, the plug hole 2a is directly connected to the transition hole. The front end of the lock head 5 has a locking portion 5b, and the locking portion 5b is inserted into the plug hole 2a through the transition hole.

[0032] like Figure 1 and Figure 2 As shown, the rear end sleeve 10 of the lock head 5 is connected with a shielding member 6, and the shielding member 6 can rotate relative to the lock head 5. An anti-slip structure is provided between the shielding member 6 and the lock head 5 to prevent the shielding member 6 from slipping out of the rear end of the lock head 5. The rear end of the shielding member 6 has an annular shielding portion 6a, and the shielding portion 6a is located behind the lock head 5. The shielding member 6 is a metal member, and the shielding member 6 has a main body 6b in the shape of an annulus, and the main body 6b forms a clearance fit with the hole wall of the mounting hole 1b1. The anti-slip structure includes an annular flange 6c arranged on the inner side of the front end of the main body 6b and an annular blocking portion 5c arranged on the outer side of the rear end of the lock head 5. The annular blocking portion 5c is located behind the annular flange 6c. The outer side of the annular flange 6c has a guide surface 1 6c1, and the outer side of the annular blocking portion 5c has a guide surface 2 5c1. The guide surface 1 6c1 and the guide surface 2 5c1 are both conical surfaces. The inner diameter of the guide surface 1 6c1 gradually decreases from front to back, and the outer diameter of the guide surface 2 5c1 gradually decreases from front to back. The taper of the guide surface 1 6c1 and the guide surface 2 5c1 is the same. The mounting hole 1b1 is also threadedly connected with a limit ring 7. The lock head 5 passes through the limit ring 7. The outer side of the lock head 5 has an annular convex shoulder 5d, which is located in front of the limit ring 7. When the front end of the lock head 5 is inserted into the side of the valve stem 2, the distance between the convex shoulder 5d and the limit ring 7 is greater than the length of the front end of the lock head 5 inserted into the valve stem 2.

[0033] When the valve stem 2 is in a locked state, the locking portion 5b at the front end of the lock head 5 passes through the transition hole and is inserted into the insertion hole 2a on the side of the valve stem 2. At this time, the valve stem 2 is locked so that the user cannot open the valve by operating the valve stem 2. Since the rear end of the lock head 5 is connected to the outer sleeve 10, the rear end of the shielding member 6 has a ring-shaped shielding portion 6a and the shielding portion 6a is located behind the lock head 5, which means that the shielding member 6 blocks the position of the rear end of the lock head 5 that can be clamped by needle-nosed pliers, so that the user can no longer operate the lock head 5 by clamping the rear end of the lock head 5 with needle-nosed pliers. Moreover, the shielding member 6 is sleeved outside the rear end of the lock head 5, and the shielding member 6 can rotate freely relative to the lock head 5, so that even if the user clamps the shielding member 6 with needle-nosed pliers to rotate it, the lock head 5 will still not be rotated. As a result, the anti-theft reliability of the locking ball valve in the locked state is greatly improved, that is, the difficulty of the locking ball valve being stolen is increased.

[0034] In this embodiment, if Figure 3 As shown, the connecting hole 5a is a circular hole, and the connecting hole 5a is concentrically arranged with the central hole of the shielding portion 6a, and the aperture of the shielding portion 6a is larger than the aperture of the connecting hole 5a. Figure 4 , Figure 5 and Figure 6As shown, the locking ball valve also includes an unlocking key 8, which includes an operating rod 9, a jacket 10 and a coupling 11. The jacket 10 is sleeved outside the operating rod 9. The front end of the operating rod 9 has a matching section 9a eccentrically arranged relative to other positions of the operating rod 9. The side of the jacket 10 has a clearance notch 10a corresponding to the position of the matching section 9a. The coupling 11 abuts against the outer wall of the matching section 9a and has a block-shaped coupling portion 11a protruding outside the clearance notch 10a. Rotating the operating rod 9 can squeeze the coupling 11 outward. The connecting hole 5a is set as a round hole, so that the user cannot operate the lock head 5 using some conventional tools, and the lock head 5 can only be operated using a dedicated unlocking key 8. In the initial state, the operating rod 9 is in a position where the distance from the center line of the matching section 9a to the clearance notch 10a is greater than the distance from the center line of other positions of the operating rod 9 to the clearance notch 10a, and the front end of the entire unlocking key 8 is directly inserted into the connecting hole 5a at the rear end of the lock 5 through the central hole of the shielding portion 6a. Because the connecting portion 11a protrudes outside the clearance notch 10a, after the front end of the entire unlocking key 8 is inserted into the connecting hole 5a of the lock 5, the part of the connecting portion 11a protruding outside the clearance notch 10a will abut against the inner hole wall of the connecting hole 5a. After that, the operating rod 9 is rotated. Since the connecting member 11 abuts against the outer wall of the matching section 9a of the operating rod 9, and the matching section 9a is eccentrically arranged relative to other positions of the operating rod 9, the center line of the eccentric section will move around the center line of other positions of the operating rod 9 during the rotation of the operating rod 9. As the eccentric segment moves, the outer wall of the eccentric segment will squeeze the connecting piece 11 toward the outside of the clearance gap 10a, so that the connecting part 11a is pressed against the inner wall of the connecting hole 5a. As a result, the operating rod 9, the connecting piece 11 and the locking head 5 will be tightly fitted into a whole, so that the locking head 5 can be driven to rotate in the subsequent rotation of the operating rod 9 in the same direction to unlock the valve stem 2.

[0035] Furthermore, in order to facilitate the operation of the operating rod 9, a hand wheel 12 is fixedly connected to the rear end of the operating rod 9. A circular limiting piece 9b is fixedly connected to the front end of the matching section 9a, and the two ends of the outer sleeve 10 abut between the limiting piece 9b and the hand wheel 12. The coupling member 11 also has an arc-shaped limiting portion 11b, and the coupling portion 11a is fixedly connected to the convex side of the limiting portion 11b (the limiting portion 11b is arc-shaped, and the arc naturally has a convex side and a concave side), and the two ends of the limiting portion 11b abut against the inner wall of the outer sleeve 10, and the connecting line between the two ends of the limiting portion 11b is larger than the width of the clearance gap 10a. This setting is to prevent the coupling member 11 from falling directly out of the clearance gap 10a.

[0036] Embodiment 2

[0037] The structure and principle of this embodiment are basically the same as those of the first embodiment, except that: in this embodiment, the anti-drop structure includes an annular flange 6c provided on the inner side of the front end of the main body 6b and a retaining spring fixed on the outer side of the rear end of the lock head 5, and the retaining spring is located behind the annular flange 6c. The retaining spring is located behind the annular flange 6c, so that the shielding member 6 can be prevented from falling off from the rear end of the lock head 5 by the abutment between the retaining spring and the annular flange 6c, so that the locking ball valve can use the shielding member 6 to protect the rear end of the lock head 5, so as to prevent others from clamping the rear end of the lock head 5 with needle-nosed pliers to operate.

[0038] Embodiment 3

[0039] The structure and principle of this embodiment are basically the same as those of the first embodiment, except that: in this embodiment, the connecting hole 5a is a special-shaped hole, and the locking ball valve also includes an unlocking tool, and the end of the unlocking tool has an unlocking portion that matches the shape of the special-shaped hole.

[0040] 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 locking ball valve, comprising a valve body (1) and a valve stem (2) vertically arranged in the valve body (1), wherein a mounting hole (1b1) is horizontally arranged on the side of the valve body (1), a locking head (5) is internally threadedly connected to the mounting hole (1b1), a front end of the locking head (5) is inserted into the valve stem (2), and a rear end of the locking head (5) has a connecting hole (5a), characterized in that: A shielding member (6) is externally connected to the rear end of the lock (5); the shielding member (6) can rotate relative to the lock (5); an anti-slip structure is provided between the shielding member (6) and the lock (5) to prevent the shielding member (6) from slipping out of the rear end of the lock (5); the rear end of the shielding member (6) has an annular shielding portion (6a), and the shielding portion (6a) is located behind the lock (5).

2. The locking ball valve according to claim 1, characterized in that: The shielding member (6) has a main body (6b) in the shape of an annulus, and the anti-slip structure comprises an annular flange (6c) arranged on the inner side of the front end of the main body (6b) and an annular blocking portion (5c) arranged on the outer side of the rear end of the lock head (5), and the annular blocking portion (5c) is located behind the annular flange (6c).

3. The locking ball valve according to claim 2, characterized in that: The outer side of the annular flange (6c) has a guide surface 1 (6c1), and the outer side of the annular blocking portion (5c) has a guide surface 2 (5c1). Both the guide surface 1 (6c1) and the guide surface 2 (5c1) are conical surfaces. The inner diameter of the guide surface 1 (6c1) gradually decreases from front to back, and the outer diameter of the guide surface 2 (5c1) gradually decreases from front to back.

4. The locking ball valve according to claim 1, characterized in that: The shielding member (6) has a main body (6b) in the shape of an annulus, and the anti-slip structure comprises an annular flange (6c) arranged on the inner side of the front end of the main body (6b) and a retaining spring fixed on the outer side of the rear end of the lock head (5), and the retaining spring is located behind the annular flange (6c).

5. The locking ball valve according to claim 2 or 4, characterized in that: The main body (6b) is clearance-matched with the hole wall of the mounting hole (1b1).

6. The locking ball valve according to claim 5, characterized in that: The shielding member (6) is a metal member.

7. The locking ball valve according to claim 1, characterized in that: A limit ring (7) is also threadedly connected in the mounting hole (1b1), and the lock head (5) passes through the limit ring (7). The outer side of the lock head (5) has an annular boss (5d), and the boss (5d) is located in front of the limit ring (7).

8. The locking ball valve according to claim 1, characterized in that: The valve body (1) comprises a cylindrical neck (1a) and a cylindrical mounting portion (1b) protruding from the outside of the neck (1a); the neck (1a) comprises an inner hole; the valve stem (2) is inserted into the neck (1a); the mounting hole (1b1) is located in the mounting portion (1b); a plug hole (2a) is provided on the side of the valve stem (2); a transition hole for connecting the inner hole of the neck (1a) with the mounting hole (1b1) is provided at the connection position between the neck (1a) and the mounting portion (1b); when the valve stem (2) is in a state of closing the ball valve, the plug hole (2a) is directly connected to the transition hole; the front end of the lock head (5) comprises a locking portion (5b); the locking portion (5b) is inserted into the plug hole (2a) through the transition hole.

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