Coded locking valve

Abstract

The utility model provides a coded locking valve, and belongs to the technical field of valves. The problem of insufficient use reliability is solved. The upper end of the valve rod extends out of the valve body, the lock shell is fixedly connected to the upper end of the valve body, the roller coded lock cylinder is fixedly connected to the upper end of the valve rod, the roller coded lock cylinder is located in the upper end of the lock shell, the roller coded lock cylinder and the lock shell are fixed in the vertical direction, and the upper end of the lock shell is sleeved with a lock cover which is fixedly connected with the roller coded lock cylinder; the blocking cover is hinged to the lock cover and can be opened around a hinge point, the side portion of the blocking cover is in threaded connection with an anti-disassembly screw in the horizontal direction, the side portion of the lock cover is provided with a blocking portion, and the end of the anti-disassembly screw is located below the blocking portion. The method has the advantages of higher reliability and the like.

Description

Technical Field

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

[0002] Traditional valves do not have a locking function. Even if users have not paid their water or gas bills, they can still open the valve freely, which is not conducive to management. For this reason, valves with locking functions have appeared on the market. Managers can use the locking function to lock the valve, making it impossible for users to operate the valve, thereby greatly improving the management convenience of managers. For example, a password locking valve disclosed in patent application No. 201320430411.5 includes a valve body and a lock core that can be sleeved on a valve stem extension at the upper end of the valve body, the bottom of the lock core has a concave cavity matching the valve stem extension at the upper end of the valve body, a lock shell is connected to the lock core outer shell, a plurality of password dials are provided at the upper end of the lock core, an annular embedding groove is provided on the side of the upper end of the valve body, a plurality of penetrating positioning holes are provided on the side of the lower end of the lock core in the circumferential direction, a ball is provided in the positioning hole, and under the action of the inner side wall of the lock shell, the ball part extends out of the positioning hole at one end of the inner side wall of the lock core and is embedded in the embedding groove of the valve body, and a groove with the same number as the positioning holes is provided on the inner side wall of the lower end of the lock shell. When the password dial is rotated to the set value, the lock core can rotate relative to the lock shell and make the positioning hole face the groove. In the initial stage, the lock core is connected to the upper end of the valve body, and the combination dial is rotated to the set value, that is, the lock core is in the unlocked state, the positioning hole on the inner wall of the lock core is opposite to the groove on the inner wall of the lock shell, and the ball arranged in the positioning hole is located in the groove. When the lock core is rotated along the locked state, the positions of the positioning hole and the groove are staggered with each other. Under the action of the inner wall of the lock shell, the ball part extends out of the positioning hole and is embedded in the annular groove on the upper end of the valve body. In this way, the lock core locks the valve body and the two are locked with each other, and then the combination dial can be messed up, so that the valve is closed and cannot be used.

[0003] However, the above-mentioned password locking valve also has shortcomings: the password dial is directly exposed to the outside, so that others can actually turn the password dial at will. In this way, it is possible for others to operate the valve by dialing the password dial through multiple attempts, so there is a problem of insufficient reliability in use. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes a password locking valve to solve the problem of insufficient reliability in use.

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

[0006] A password locking valve comprises a valve body, a valve stem extending out of the valve body at the upper end, a lock shell fixedly connected to the upper end of the valve body and a roller password lock core fixedly connected to the upper end of the valve stem, the roller password lock core is located in the upper end of the lock shell and the two are fixed to each other in the vertical direction, a lock cover is arranged on the outer sleeve of the upper end of the lock shell, the lock cover is fixedly connected to the roller password lock core, and is characterized in that the lock cover outer cover is provided with a blocking cover, the blocking cover is hinged to the lock cover and the blocking cover can be flipped open around the hinge point, the side of the blocking cover is threadedly connected with an anti-dismantling screw in the horizontal direction, the side of the lock cover has a blocking portion, and the end of the anti-dismantling screw is located below the blocking portion.

[0007] In the locked state, the roller password lock core and the lock shell are fixed in the circumferential direction so that the valve stem cannot be rotated. The cover is set outside the lock cover, and the end of the cover is horizontally threaded and connected to the side of the cover. It is located below the blocking part of the side of the lock cover. At this time, the cover cannot be opened because of the blocking structure formed by the anti-disassembly screw and the blocking part. When the valve needs to be operated, the manager will hold a special tool to rotate the anti-disassembly screw so that the end of the anti-disassembly screw and the blocking part are displaced in the vertical direction, so that the cover can be opened and the password can be entered.

[0008] By setting the blocking cover, the lock cover can be covered, so that others can no longer operate the roller combination lock cylinder, thereby improving the reliability of use. At the same time, the side of the blocking cover is connected to the anti-disassembly screw along the horizontal thread, and a blocking part is set on the side of the lock cover. The end of the anti-disassembly screw is located below the blocking part. The anti-disassembly screw requires a special tool to operate, so that others cannot open the blocking cover at will, further improving the reliability of use.

[0009] In the above-mentioned password locking valve, the side of the blocking cover is provided with a through hole in the horizontal direction, an insert with an internal thread hole is fixed in the through hole, the anti-disassembly screw is threadedly connected in the internal thread hole of the insert, and the head of the anti-disassembly screw is located in the through hole.

[0010] The internal threaded hole of the insert provides a threaded connection position for the anti-dismantling screw, and the head of the anti-dismantling screw is located in the through hole to ensure that others cannot use tools such as wrenches or needle-nosed pliers to violently remove the anti-dismantling screw, further improving the reliability of the use of the password locking valve.

[0011] In the above-mentioned password locking valve, the side of the blocking cover has an ear part 1, and the through hole is arranged on the ear part 1.

[0012] When the anti-disassembly screw is out of engagement with the blocking portion, the manager can easily flip open the cover through the ear portion 1. By directly setting the through hole on the ear portion 1, the anti-disassembly screw can be used to bear the force of the ear portion 1, preventing others from violently breaking the ear portion 1.

[0013] In the above-mentioned password lock valve, the side of the retaining cover has a second ear portion. The bottom of the second ear portion has a relief groove communicating with the inner cavity of the retaining cover. The side of the lock cover has a convex block located in the relief groove. The retaining cover and the lock cover are hinged by a pin shaft passing through the convex block and the second ear portion, and the protruding directions of the first ear portion and the second ear portion are opposite.

[0014] When the retaining cover covers the lock cover, the convex block is completely located in the relief groove of the second ear portion, and only the second ear portion can be seen from the outside, which also eliminates the possibility of others violently damaging the hinge between the retaining cover and the lock head from the outside. In addition, the protruding directions of the first ear portion and the second ear portion are opposite, which is more in line with the operating habits of the public.

[0015] In the above-mentioned password lock valve, a mating groove is provided on the side of the lock cover, and the mating groove penetrates downward. The blocking portion is the part of the lock cover where the upper side wall of the mating groove is located.

[0016] Compared with directly providing a blocking portion such as a strip or a block on the side of the lock cover, it is easier and less difficult to obtain the blocking portion in the above-mentioned manner in practice.

[0017] In the above-mentioned password lock valve, a mark indicating the rotation direction of the valve stem from opening the valve to closing the valve is provided on the upper surface of the retaining cover.

[0018] By providing a mark on the upper surface of the retaining cover, the management personnel can intuitively understand the operation direction.

[0019] In the above-mentioned password lock valve, the top of the lock housing has a concave cavity and its bottom has a socket hole, and the socket hole communicates with the concave cavity. The socket hole is sleeved outside the upper end of the valve body.

[0020] The roller password lock core includes a block-shaped core body, a wheel shaft slidably arranged on the core body in the horizontal direction, a plurality of rollers sleeved on the wheel shaft, and a locking piece slidably arranged on the core body in the axial direction of the wheel shaft. The lock cover is fixed to the core body, the core body is fixed to the upper end of the valve stem. One end of the wheel shaft has a shoulder, and a return spring is sleeved outside the wheel shaft. One end of the return spring abuts against the shoulder, and the other end of the return spring abuts against the roller closest to the shoulder. Unlocking notches are provided on the side edges of each roller close to the shoulder. The locking piece has a plurality of pointed parts corresponding to the unlocking notches in the axial direction of the wheel shaft. A plurality of notches are provided on the inner wall of the concave cavity of the lock housing, and the notches are evenly distributed in the circumferential direction and the included angle between the first and last notches is 90°. The locking piece has a locking portion that can be inserted into any one of the notches, and the lower end surface of the locking portion protrudes outside the lower end surface of the locking piece. The end of the wheel shaft with the shoulder abuts against this part of the locking portion protruding outside the lower end surface of the locking piece in the horizontal direction.

[0021] In the locked state, the locking portion of the locking piece is located in one of the notches inside the lock housing, and the pointed parts of the locking piece are abutted against the side surfaces of the rollers (that is, the unlocking notches of the rollers are staggered from the pointed parts of the locking piece). It is equivalent to the side surfaces of the rollers blocking the locking piece so that it cannot move in the direction of causing the locking portion to escape from the notch where it is located. Moreover, the lock cover is fixed to the core body and the core body is fixed to the valve stem. Therefore, the lock cover and the valve stem are also fixed to the lock housing together. At this time, the management personnel cannot rotate the lock cover. When unlocking is required, just rotate each roller until the unlocking notch of each roller is opposite to the pointed part of the locking piece. The existence of each unlocking notch provides space for the locking piece to move in the direction of causing the locking portion to escape from the notch where it is located. In this way, the management personnel can rotate the lock cover to drive the valve stem to rotate to achieve the opening, closing or flow regulation of the valve.

[0022] In the above-mentioned password lockable valve, a limiting block protruding horizontally from the inner wall of the concave cavity is arranged in the lock housing. The side part of the limiting block has two perpendicular limiting surfaces. When the locking piece is inserted into the first notch, the core body abuts against one of the limiting surfaces, and when the locking piece is inserted into the last notch, the core body abuts against the other limiting surface.

[0023] By arranging the limiting block, the valve stem can be limited to rotate in only one direction and the rotation angle can be limited to 90°.

[0024] In the above-mentioned password lockable valve, a transmission part is convexly arranged at the bottom of the core body. The transmission part is cylindrical and is located at the upper end orifice of the socket hole. The cross-section of the upper end part of the valve stem is non-circular. The bottom of the transmission part has a coupling groove matching with the upper end part of the valve stem. An annular groove is arranged outside the transmission part. At least one limiting pin is horizontally fixed on the lower side part of the lock housing, and the limiting pin is inserted into the annular groove.

[0025] After the core body is placed in the concave cavity at the top of the lock housing, the transmission part at the bottom of the core body is inserted into the upper end orifice of the socket hole of the lock housing, and then the limiting pin is driven into the lower side part of the lock housing, and the limiting pin is inserted into the annular groove. Through the cooperation of the limiting pin and the annular groove, not only can the roller password lock core rotate relative to the lock housing, but also the roller password lock core can be fixed to the lock housing in the vertical direction.

[0026] In the above-mentioned password lockable valve, the upper end of the valve body has a columnar part matching with the socket hole. At least one fixing pin is horizontally fixedly connected to the lower side part of the lock housing, and the fixing pin is inserted into the columnar part. At least one slot is arranged vertically on the side part of the columnar part, and at least one inserting part is convexly arranged on the lower end hole wall of the socket hole, and the inserting part is located in the slot.

[0027] During assembly, the lock housing is sleeved outside the columnar part of the valve body through the socket hole with the insertion part aligned with the slot, and then the lock housing and the columnar part are fixed together with a fixing pin. Through the cooperation of the insertion part and the slot, the circumferential shear force borne by the fixing pin when someone turns the lock housing with a tool can be shared.

[0028] Compared with the prior art, the present password lock valve can cover the lock cover through the setting of the retaining cover. An anti-disassembly screw is threadedly connected horizontally along the side of the retaining cover, and a blocking part is arranged on the side of the lock cover. The end of the anti-disassembly screw is located below the blocking part. The anti-disassembly screw needs to be operated with a special tool, so that others cannot turn over the retaining cover at will, and thus others cannot perform the operation of inputting the password, improving the reliability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a three-dimensional schematic diagram of the present password lock valve in the state where the retaining cover is not turned over in the first embodiment.

[0030] Figure 2 is a top view of the present password lock valve in the state where the retaining cover is not turned over in the first embodiment.

[0031] Figure 3 is Figure 2 a cross-sectional view taken along the A-A direction in

[0032] Figure 4 is Figure 2 a cross-sectional view taken along the B-B direction in

[0033] Figure 5 is Figure 4 a partial enlarged view at the roller password lock core in

[0034] Figure 6 is a three-dimensional schematic diagram of the present password lock valve in the state where the retaining cover is turned over in the first embodiment.

[0035] Figure 7 is an exploded schematic diagram of the present password lock valve after removing the retaining cover in the first embodiment.

[0036] Figure 8 is a three-dimensional schematic diagram of the present password lock valve after removing the retaining cover and the lock cover in the first embodiment.

[0037] Figure 9 is another three-dimensional schematic diagram of the present password lock valve after removing the retaining cover and the lock cover in the first embodiment.

[0038] Figure 10 is a three-dimensional schematic diagram of the present password lock valve in the state where the retaining cover is not turned over in the second embodiment.

[0039] Figure 11It is a three-dimensional schematic diagram of the present password lock valve in the state where the shield is opened in the second embodiment.

[0040] In the figure, 1. valve body; 1a. columnar part; 1a1. slot; 2. ball core; 3. valve rod; 4. lock housing; 4a. concave cavity; 4b. socket hole; 4c. notch; 4d. limiting block; 4e. relief notch; 4f. password-changing hole; 4g. insertion part; 5. roller password lock core; 6. lock cover; 6a. blocking part; 6b. convex block; 6c. mating groove; 6d. connecting column; 6e. relief hole; 6f. abutting step; 7. shield; 7a. through hole; 7b. insert; 7c. ear part one; 7d. ear part two; 7d1. relief groove; 7e. mark; 7f. retaining piece; 8. anti-disassembly screw; 9. pin shaft; 10. core body; 10a. connecting ear; 10b. transmission part; 10b1. coupling groove; 10b2. annular groove; 11. wheel shaft; 11a. shoulder; 12. roller; 12a. code-changing wheel body; 12a1. unlocking notch; 12b. dialing wheel body; 13. locking piece; 13a. tip; 13b. locking part; 14. return spring; 15. limit pin; 16. fixing pin. Detailed implementation manners

[0041] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0042] Embodiment 1

[0043] As Figure 1 、 Figure 3 and Figure 6 shown, the password lock valve includes a valve body 1, a ball core 2 and a valve rod 3 which are all arranged in the valve body 1, and the upper end of the valve rod 3 extends out of the valve body 1. The present password lock valve further includes a lock housing 4 fixedly connected to the upper end of the valve body 1 and a roller password lock core 5 fixedly connected to the upper end of the valve rod 3. The roller password lock core 5 is fixedly connected to the upper end inside the lock housing 4 in the vertical direction. A lock cover 6 is sleeved outside the upper end of the lock housing 4, and the lock cover 6 is fixedly connected to the roller password lock core 5. A shield 7 is externally covered on the lock cover 6, and the shield 7 is hinged to the lock cover 6 and the shield 7 can be opened around the hinge point.

[0044] As Figure 1 、 Figure 2 、 Figure 3 and Figure 6As shown, the side of the blocking cover 7 is threadedly connected with an anti-disassembly screw 8 in the horizontal direction, and the side of the lock cover 6 has a blocking portion 6a, and the end of the anti-disassembly screw 8 is located below the blocking portion 6a. The side of the blocking cover 7 is provided with a through hole 7a in the horizontal direction, and an insert 7b with an internal thread hole is fixed in the through hole 7a. The anti-disassembly screw 8 is threadedly connected in the internal thread hole of the insert 7b, and the head of the anti-disassembly screw 8 is located in the through hole 7a. The internal thread hole of the insert 7b provides a threaded connection position for the anti-disassembly screw 8, and the head of the anti-disassembly screw 8 is located in the through hole 7a to ensure that others cannot use tools such as wrenches or needle-nosed pliers to violently dismantle the anti-disassembly screw 8. The side of the blocking cover 7 has an ear 7c, and the through hole 7a is set on the ear 7c. When the anti-disassembly screw 8 is out of engagement with the blocking portion 6a, the staff can easily flip open the blocking cover 7 through the ear portion 1 7c; if the through hole 7a is directly set on the ear portion 1 7c, the anti-disassembly screw 8 can be used to bear the force of the ear portion 1 7c, so as to prevent others from breaking the ear portion 1 7c directly when they violently break it. The side of the blocking cover 7 also has an ear portion 2 7d, and the bottom of the ear portion 2 7d has a clearance groove 7d1 connected to the inner cavity of the blocking cover 7. The side of the lock cover 6 has a protrusion 6b, and the protrusion 6b is located in the clearance groove 7d1. The blocking cover 7 and the lock cover 6 are hinged by the pin shaft 9 passing through the protrusion 6b and the ear portion 2 7d, and the protrusion direction of the ear portion 1 7c is opposite to that of the ear portion 2 7d. In this embodiment, the side of the lock cover 6 is provided with a matching groove 6c, and the matching groove 6c is set to penetrate downward, and the blocking portion 6a is the part of the lock cover 6 where the upper side groove wall of the matching groove 6c is located. The upper surface of the blocking cover 7 is provided with a mark 7e indicating the rotation direction of the valve stem 3 from opening the valve to closing the valve, and the management personnel can intuitively understand the operation direction through the mark 7e.

[0045] In the locked state, the roller code lock core 5 and the lock housing 4 are fixed in the circumferential direction so that the valve stem 3 cannot be rotated, and the blocking cover 7 is set outside the lock cover 6, and the end of the blocking cover 7 is horizontally threaded and located below the blocking part 6a on the side of the lock cover 6. At this time, the blocking structure formed by the anti-disassembly screw 8 and the blocking part 6a makes the blocking cover 7 unable to be opened. When the valve needs to be operated, the manager holds a special tool to rotate the anti-disassembly screw 8 so that the end of the anti-disassembly screw 8 and the blocking part 6a are displaced in the vertical direction, so that the blocking cover 7 can be opened and the password input operation can be performed.

[0046] By setting the blocking cover 7, the lock cover 6 can be covered, so that others can no longer operate the roller combination lock cylinder 5, thereby improving the reliability of use. At the same time, the side of the blocking cover 7 is connected to the anti-disassembly screw 8 along the horizontal thread, and a blocking part 6a is set on the side of the lock cover 6. The end of the anti-disassembly screw 8 is located below the blocking part 6a. The anti-disassembly screw 8 can only be operated with a special tool, thereby preventing others from arbitrarily opening the blocking cover 7, further improving the reliability of use.

[0047] Further, as shown in Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 and Figure 9 , the top of the lock housing 4 has a concave cavity 4a and its bottom has a socket hole 4b. The socket hole 4b is communicated with the concave cavity 4a, and the socket hole 4b is sleeved outside the upper end of the valve body 1. The roller combination lock core 5 includes a block-shaped core body 10, a wheel shaft 11 slidably arranged on the core body 10 in the horizontal direction, a plurality of rollers 12 sleeved on the wheel shaft 11, and a locking piece 13 slidably arranged on the core body 10 along the axial direction of the wheel shaft 11. The lock cover 6 is fixed to the core body 10, and the core body 10 is fixed to the upper end of the valve stem 3. One end of the wheel shaft 11 has a shoulder 11a, and this end of the wheel shaft 11 abuts against the inner wall of the core body 10 in the horizontal direction. A return spring 14 is sleeved outside the wheel shaft 11. One end of the return spring 14 abuts against the shoulder 11a, and the other end of the return spring 14 abuts against the nearest roller 12 to the shoulder 11a. An unlocking notch 12a1 is provided on the side edge of each roller 12 close to the shoulder 11a. The locking piece 13 has a plurality of pointed parts 13a corresponding to the unlocking notches 12a1 along the axial direction of the wheel shaft 11. A plurality of notches 4c are provided on the inner wall of the concave cavity 4a of the lock housing 4. The notches 4c are evenly distributed in the circumferential direction, and the included angle between the first and the last notches 4c is 90°. The locking piece 13 has a locking part 13b that can be inserted into any one of the notches 4c. The lower end surface of the locking part 13b protrudes outside the lower end surface of the locking piece 13. The end of the wheel shaft 11 with the shoulder 11a abuts against the part of the locking part 13b that protrudes outside the lower end surface of the locking piece 13 in the horizontal direction.

[0048] In the locked state, the locking portion 13b of the locking piece 13 is located within one of the notches 4c inside the lock housing 4, and the pointed portions 13a of the locking piece 13 are abutted against the side surfaces of the rollers 12 (i.e., the unlocking notches 12a1 of the rollers 12 are offset from the pointed portions 13a of the locking piece 13). It is equivalent to the side surfaces of the rollers 12 blocking the locking piece 13 so that it cannot move in the direction that causes the locking portion 13b to escape from the corresponding notch 4c. Moreover, the lock cover 6 is fixed to the core body 10, and the core body 10 is fixed to the valve stem 3. Therefore, the lock cover 6 and the valve stem 3 are also fixed to the lock housing 4. At this time, the management personnel cannot rotate the lock cover 6. When unlocking is required, just rotate each of the rollers 12 until the unlocking notches 12a1 of each roller 12 are opposite to the pointed portions 13a of the locking piece 13. The existence of the unlocking notches 12a1 provides space for the locking piece 13 to move in the direction that causes the locking portion 13b to escape from the corresponding notch 4c. In this way, the management personnel can rotate the lock cover 6 to drive the valve stem 3 to rotate, so as to realize the opening, closing or flow regulation of the valve. A limiting block 4d protruding horizontally from the inner wall of the concave cavity 4a is provided inside the lock housing 4. The side of the limiting block 4d has two perpendicular limiting surfaces. When the locking piece 13 is inserted into the leading notch 4c, the core body 10 abuts against one of the limiting surfaces, and when the locking piece 13 is inserted into the trailing notch 4c, the core body 10 abuts against the other limiting surface. By providing the limiting block 4d, the valve stem 3 can be limited to rotate in only one direction and the rotation angle can be limited to 90°. In practice, the lock cover 6 has a connecting post 6d protruding downward from its inner top wall, and the side of the core body 10 has a connecting ear 10a. The core body 10 and the lock cover 6 are fixed by a screw that passes through the connecting ear 10a and is threadedly connected inside the connecting post 6d. A plurality of relief notches 4e are circumferentially provided on the upper side of the lock housing 4, and the relief notches 4e communicate with the concave cavity 4a. The relief notches 4e can be used to install the screw during assembly.

[0049] Specifically, such as Figure 4 , Figure 5 , Figure 8 and Figure 9As shown, each roller 12 includes a code-changing wheel body 12a sleeved outside the wheel shaft 11 and a dial wheel body 12b sleeved outside the code-changing wheel body 12a, the unlocking notch 12a1 is located on the code-changing wheel body 12a, each dial wheel body 12b is fixed to the core body 10 along the axial direction of the wheel shaft 11, and the outer wheel surface of each dial wheel body 12b is partially exposed outside the lock cover 6, and a plug-in structure with a concave-convex fit is provided between each code-changing wheel body 12a and the sleeved dial wheel body 12b. When each code-changing wheel body 12a is translated along the wheel shaft 11 toward the direction of the compression reset spring 14, the plug-in structure between each code-changing wheel body 12a and the sleeved dial wheel body 12b can be disengaged, and after the plug-in structure is disengaged, the code can be changed by rotating the dial wheel body 12b. In this embodiment, each code-changing wheel body 12a includes a wheel portion and a columnar portion 1a protruding from the side of the wheel portion away from the shoulder 11a. The plug-in structure includes a plurality of grooves circumferentially arranged on the inner wall of the center hole of the code-changing wheel body 12b and a plurality of plug-in blocks circumferentially arranged on one side of the wheel portion. The plug-in blocks and the columnar portion 1a are located on the same side of the wheel portion. The reset spring 14 abuts against the wheel portion of the code-changing wheel body 12a closest to the shoulder 11a. Each columnar portion 1a has a connecting hole along the axial direction. The other end of the wheel axle 11 is located in the connecting hole of the columnar portion 1a of the code-changing wheel body 12a farthest from the shoulder 11a. The connecting holes of the columnar portions 1a of the remaining code-changing wheel bodies 12a are all axially through-arranged so that the wheel axle 11 can pass through. A clearance hole 6e is provided on the side of the lock cap 6, and two code-changing holes 4f connected with the concave cavity 4a are provided on the side of the upper end of the lock shell 4, one of the code-changing holes 4f is opposite to the leading recess 4c, and the other code-changing hole 4f is opposite to the trailing recess 4c. When the locking portion 13b of the locking plate 13 is located in the leading recess 4c, the clearance hole 6e is opposite to the corresponding code-changing hole 4f, and when the locking portion 13b is located in the trailing recess 4c, the clearance hole 6e is opposite to the other code-changing hole 4f. Through such an arrangement, the code-changing operation can be performed whether the valve is in a fully closed state or in a fully opened state. Specifically, when changing the password, a pin is inserted from the password changing hole 4f to push the code changing wheel body 12a farthest from the blocking shoulder 11a toward the blocking shoulder 11a. Because one end of the wheel shaft 11 having the blocking shoulder 11a is against the inner wall of the core body 10 in the horizontal direction, the code changing wheel bodies 12a will move toward the blocking shoulder 11a together and compress the reset spring 14, thereby disengaging the plug-in structure between the code changing wheel body 12a and the set code dial wheel body 12b.

[0050] Furthermore, if Figure 3 , Figure 4 and Figure 7As shown, a transmission part 10b protrudes from the bottom of the core body 10. The transmission part 10b is cylindrical and located within the upper orifice of the socket hole 4b. The cross-section of the upper end of the valve rod 3 is non-circular. The bottom of the transmission part 10b has a coupling groove 10b1 that mates with the upper end of the valve rod 3. The upper end of the valve rod 3 and the coupling groove 10b1 are specifically flat-square in shape. An annular groove 10b2 is provided on the outer side of the transmission part 10b. At least one limit pin 15 is horizontally fixed to the lower side of the lock housing 4, and the limit pin 15 is inserted into the annular groove 10b2. After the core body 10 is placed in the concave cavity 4a at the top of the lock housing 4, the transmission part 10b at the bottom of the core body 10 is inserted into the upper orifice of the socket hole 4b of the lock housing 4, and then the limit pin 15 is driven into the lower side of the lock housing 4, and the limit pin 15 is inserted into the annular groove 10b2. Through the cooperation of the limit pin 15 and the annular groove 10b2, the roller combination lock core 5 can rotate relative to the lock housing 4, and at the same time, the roller combination lock core 5 can be fixed to the lock housing 4 in the vertical direction. The upper end of the valve body 1 has a cylindrical part 1a that mates with the socket hole 4b. At least one fixing pin 16 is horizontally fixedly connected to the lower side of the lock housing 4, and the fixing pin 16 is inserted into the cylindrical part 1a. At least one slot 1a1 is provided vertically on the side of the cylindrical part 1a. At least one insertion part 4g protrudes from the lower hole wall of the socket hole 4b, and the insertion part 4g is located within the slot 1a1. During assembly, the lock housing 4 is sleeved outside the cylindrical part 1a of the valve body 1 through the socket hole 4b with the insertion part 4g aligned with the slot 1a1, and then the lock housing 4 and the cylindrical part 1a are fixed together with the fixing pin 16. Through the cooperation of the insertion part 4g and the slot 1a1, the circumferential shear force borne by the fixing pin 16 when others try to rotate the lock housing 4 with tools can be shared.

[0051] Embodiment 2

[0052] The structure and principle of this embodiment are basically the same as those of Embodiment 1, except that: in this embodiment, as Figure 10 and Figure 11 shown, an abutting step 6f is provided on the outer side of the upper end of the lock cover 6, and the lower end of the retaining cover 7 abuts against the abutting step 6f. The relief hole 6e is located below the abutting step 6f, and a retaining piece 7f that covers the relief hole 6e protrudes from the bottom of the retaining cover.

[0053] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. Password lock valve, comprising a valve body (1), a valve rod (3) extending out of the valve body (1) at the upper end, a lock housing (4) fixedly connected to the upper end of the valve body (1), and a roller password lock core (5) fixedly connected to the upper end of the valve rod (3). The roller password lock core (5) is located inside the upper end of the lock housing (4) and the two are fixed in the vertical direction. A lock cover (6) is sleeved outside the upper end of the lock housing (4), and the lock cover (6) is fixedly connected to the roller password lock core (5), characterized in that, A retaining cover (7) is provided outside the lock cover (6). The retaining cover (7) is hinged to the lock cover (6) and can be opened around the hinge point. An anti-disassembly screw (8) is threadedly connected to the side of the retaining cover (7) in the horizontal direction. A blocking portion (6a) is provided on the side of the lock cover (6), and the end of the anti-disassembly screw (8) is located below the blocking portion (6a).

2. The password-locked valve according to claim 1, characterized in that, A through hole (7a) is provided in the horizontal direction on the side of the retaining cover (7). An insert (7b) with an internal threaded hole is fixed in the through hole (7a). The anti-disassembly screw (8) is threadedly connected to the internal threaded hole of the insert (7b), and the head of the anti-disassembly screw (8) is located in the through hole (7a).

3. The password-locked valve according to claim 2, wherein, An ear portion one (7c) is provided on the side of the retaining cover (7), and the through hole (7a) is provided on the ear portion one (7c).

4. The coded lock valve according to claim 3, characterized in that, An ear portion two (7d) is provided on the side of the retaining cover (7). A relief groove (7d1) communicating with the inner cavity of the retaining cover (7) is provided at the bottom of the ear portion two (7d). A convex block (6b) is provided on the side of the lock cover (6), and the convex block (6b) is located in the relief groove (7d1). The retaining cover (7) and the lock cover (6) are hinged by a pin shaft (9) passing through the convex block (6b) and the ear portion two (7d). The protruding directions of the ear portion one (7c) and the ear portion two (7d) are opposite to each other.

5. The password-locked valve according to claim 1 or 2 or 3 or 4, characterized in that A mating groove (6c) is provided on the side of the lock cover (6), and the mating groove (6c) penetrates downward. The blocking portion (6a) is the part of the lock cover (6) where the upper side wall of the mating groove (6c) is located.

6. The password-locked valve according to claim 1 or 2 or 3 or 4, characterized in that A mark (7e) indicating the rotation direction of the indicating valve stem (3) from opening the valve to closing the valve is provided on the upper surface of the retaining cover (7).

7. The password-locked valve according to claim 1, characterized in that, The top of the described lock housing (4) has a concave cavity (4a) and its bottom has a socket hole (4b). The socket hole (4b) communicates with the concave cavity (4a). The socket hole (4b) is sleeved outside the upper end of the valve body (1). The roller combination lock core (5) includes a block-shaped core body (10), a wheel shaft (11) slidably arranged on the core body (10) in the horizontal direction, a plurality of rollers (12) sleeved on the wheel shaft (11), and a locking piece (13) slidably arranged on the core body (10) along the axial direction of the wheel shaft (11). The lock cover (6) is fixed to the core body (10), the core body (10) is fixed to the upper end of the valve rod (3). One end of the wheel shaft (11) has a shoulder (11a). A return spring (14) is sleeved outside the wheel shaft (11). One end of the return spring (14) abuts against the shoulder (11a), and the other end of the return spring (14) abuts against the roller (12) closest to the shoulder (11a). An unlocking notch (12a1) is provided on the side edge of each roller (12) close to the shoulder (11a). The locking piece (13) has a plurality of pointed parts (13a) corresponding to the unlocking notches (12a1) along the axial direction of the wheel shaft (11). The lock housing (4) is provided with a plurality of notches (4c) on the inner wall of the concave cavity (4a). The notches (4c) are evenly distributed in the circumferential direction and the included angle between the first and the last notches (4c) is 90°. The locking piece (13) has a locking part (13b) that can be inserted into any one of the notches (4c). The lower end surface of the locking part (13b) protrudes outside the lower end surface of the locking piece (13). The end of the wheel shaft (11) with the shoulder (11a) abuts against the part of the locking part (13b) that protrudes outside the lower end surface of the locking piece (13) in the horizontal direction.

8. The password-locked valve according to claim 7, characterized in that, A limiting block (4d) protruding horizontally from the inner wall of the concave cavity (4a) is arranged in the lock housing (4). The side part of the limiting block (4d) has two perpendicular limiting surfaces. When the locking piece (13) is inserted into the first notch (4c), the core body (10) abuts against one of the limiting surfaces. When the locking piece (13) is inserted into the last notch (4c), the core body (10) abuts against the other limiting surface.

9. The coded lock valve according to claim 7, characterized in that, A transmission part (10b) protrudes from the bottom of the core body (10). The transmission part (10b) is cylindrical and is located at the upper end orifice of the socket hole (4b). The cross-section of the upper end of the valve rod (3) is non-circular. The bottom of the transmission part (10b) has a coupling groove (10b1) matching with the upper end of the valve rod (3). An annular groove (10b2) is provided outside the transmission part (10b). At least one limiting pin (15) is horizontally fixed to the lower side part of the lock housing (4), and the limiting pin (15) is inserted into the annular groove (10b2).

10. The coded lock valve according to claim 7, characterized in that, The upper end of the described valve body (1) has a columnar portion (1a) that mates with the socket hole (4b). At least one fixing pin (16) is fixedly connected to the lower end side of the lock housing (4) in the horizontal direction. The fixing pin (16) is inserted into the columnar portion (1a). At least one slot (1a1) is provided in the side of the columnar portion (1a) in the vertical direction. At least one insertion portion (4g) protrudes from the lower end hole wall of the socket hole (4b), and the insertion portion (4g) is located within the slot (1a1).

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