Butterfly valve with locking structure

Abstract

The utility model discloses a butterfly valve with locking structure relates to valve technical field, including butterfly valve body, the valve stem is rotatably installed in butterfly valve body, the valve plate is fixedly installed on valve stem, the hand wheel is connected with valve stem upper end, the butterfly valve body is installed with antitheft locking mechanism, and the antitheft locking mechanism includes the mounting frame body fixedly installed on butterfly valve body, and the spring lock core is fixedly installed in mounting frame body, is equipped with the lock tongue on spring lock core, the gear is fixedly installed on lock tongue, the rack is slidably installed below gear, and the bolt is fixedly installed in the end of rack, and the common locking mechanism is established between mounting frame body and valve stem, and the antitheft locking mechanism still includes the locating sleeve fixedly installed in mounting frame body and the limiting slot of setting up on valve stem. This kind of butterfly valve with locking structure, common locking mechanism can lock valve stem, prevent valve plate from arbitrary deflection, and the antitheft locking mechanism can prevent the stranger from controlling valve opening at will.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically a butterfly valve with a locking structure. Background Technology

[0002] A butterfly valve is a simple regulating valve, also called a flap valve. It can be used for the on / off control of low-pressure pipeline media. A butterfly valve is a type of valve whose closing element is a disc that rotates around the valve shaft to achieve opening and closing. Existing butterfly valves achieve on / off control of low-pressure pipeline media through the combined action of the valve body, valve stem, and handwheel.

[0003] In the prior art, publication number CN219013382U discloses a butterfly valve with a locking structure, including a base assembly and a filter assembly. The base assembly includes a working part, a stabilizing part, and a limiting part, with the stabilizing part and the limiting part both disposed on the working part. The filter assembly includes a shock-absorbing part and a fixing part, with the shock-absorbing part disposed on the working part and the fixing part disposed on the shock-absorbing part.

[0004] The aforementioned butterfly valve uses a spring and a positioning block to lock the valve stem. In outdoor environments, due to prolonged exposure, the spring may gradually corrode. This corrosion will gradually affect the locking effect of the valve stem, leading to a decline in its performance. Furthermore, installing the butterfly valve outdoors poses a safety hazard: it could be arbitrarily opened or closed by unauthorized individuals or criminals. This not only threatens the safe operation of the equipment but may also seriously affect the stability and reliability of the entire system. Utility Model Content

[0005] The purpose of this invention is to provide a butterfly valve with a locking structure to solve the problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a butterfly valve with a locking structure, comprising a butterfly valve body, a valve stem rotatably mounted within the butterfly valve body, a valve plate fixedly mounted on the valve stem, a handwheel connected to the upper end of the valve stem, an anti-theft locking mechanism mounted on the butterfly valve body, the anti-theft locking mechanism comprising a mounting frame fixedly mounted on the butterfly valve body, a spring lock core fixedly mounted within the mounting frame, a locking tongue provided on the spring lock core, a gear fixedly mounted on the locking tongue, a rack slidably mounted below the gear, a pin fixedly mounted at the end of the rack, and a common locking mechanism provided between the mounting frame and the valve stem.

[0007] Preferably, the anti-theft locking mechanism further includes a positioning sleeve fixedly installed in the mounting frame and a limiting groove opened on the valve stem, wherein a first spring is provided inside the positioning sleeve.

[0008] Preferably, the mounting bracket is provided with bolts at the bottom, and the mounting bracket is fixedly installed on the butterfly valve body by bolts, and the valve plate is rotatably installed in the butterfly valve body by the valve stem.

[0009] Preferably, the gear is rotatably mounted above the rack via a locking tongue, and the gear meshes with the rack. The rack is movably mounted in the mounting frame via a positioning sleeve. One end of the first spring is connected to the rack, and the other end of the first spring is connected to the bottom of the positioning sleeve.

[0010] Preferably, the ordinary locking mechanism includes a connecting sleeve slidably mounted on the upper end of the valve stem and a lock hole opened on the mounting frame. A square rod is fixedly mounted on the upper end of the valve stem. A second spring is provided on the upper end of the connecting sleeve. A positioning ring seat is fixedly mounted on the connecting sleeve. A lock cap is fixedly mounted on the positioning ring seat. A sealing ring is fixedly mounted on the lower edge of the connecting sleeve.

[0011] Preferably, the connecting sleeve has a square groove, and the square rod is slidably installed in the connecting sleeve through the square groove.

[0012] Preferably, one end of the second spring is connected to the top of the connecting sleeve, and the other end of the second spring is connected to the upper end of the square rod. The locking cap is fixedly installed around the connecting sleeve through the positioning ring seat, and the handwheel is installed at the upper end of the valve stem through the connecting sleeve.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this application, applying a downward force to the handwheel drives the connecting sleeve to move downwards, causing the lock cap to disengage from the lock hole. Once the lock cap is separated from the lock hole, rotating the handwheel operates the valve stem, thereby controlling the opening of the valve plate. After the valve plate is opened, releasing the handwheel causes the second spring to move the connecting sleeve upwards, allowing the lock cap to re-embed into the lock hole, thus completing the locking process of the connecting sleeve. After locking, the connecting sleeve restricts the rotational movement of the square rod, ensuring stable locking of the valve stem and preventing unintended deflection of the valve plate. Furthermore, the springs are all located inside the device, preventing corrosion.

[0015] 2. In this application, when the valve plate is in the open position, the first spring drives the rack to move forward. The forward movement of the rack causes the pin to move forward until it inserts into the limiting groove on the valve stem, restricting the rotational movement of the valve stem and thus achieving the valve plate locking mechanism. The user must insert a key into the spring lock cylinder to rotate the locking tongue. The rotation of the locking tongue causes the gear to rotate, which in turn causes the rack to move backward, causing the pin to disengage from the limiting groove. By using the key, the user can unlock the valve stem, effectively preventing unauthorized personnel from operating the valve. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial structural schematic diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the anti-theft locking mechanism of this utility model;

[0019] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0020] Figure 5 This is a schematic diagram of the ordinary locking mechanism of this utility model.

[0021] The following are the labeling elements in the diagram: 1. Butterfly valve body; 2. Handwheel; 3. Valve stem; 4. Valve plate; 5. Anti-theft locking mechanism; 501. Mounting frame; 502. Spring lock core; 503. Lock tongue; 504. Limit groove; 505. Positioning sleeve; 506. First spring; 507. Rack; 508. Gear; 509. Pin; 6. Ordinary locking mechanism; 601. Connecting sleeve; 602. Second spring; 603. Square rod; 604. Lock hole; 605. Lock cap; 606. Positioning ring seat; 607. Sealing ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1 and Figure 2 As shown, this utility model provides a technical solution for a butterfly valve with a locking structure, including a butterfly valve body 1, a valve stem 3 rotatably installed inside the butterfly valve body 1, a valve plate 4 fixedly installed on the valve stem 3, a handwheel 2 connected to the upper end of the valve stem 3, an anti-theft locking mechanism 5 installed on the butterfly valve body 1, and a common locking mechanism 6 provided between the mounting frame 501 and the valve stem 3. The common locking mechanism 6 can lock the valve stem 3 to prevent the valve plate 4 from deflecting arbitrarily, and the anti-theft locking mechanism 5 can prevent outsiders from arbitrarily controlling the valve to open.

[0024] like Figure 2 , Figure 3 and Figure 4As shown, the anti-theft locking mechanism 5 includes a mounting bracket 501 fixedly installed on the butterfly valve body 1. A spring lock core 502 is fixedly installed inside the mounting bracket 501. A lock tongue 503 is provided on the spring lock core 502. A gear 508 is fixedly installed on the lock tongue 503. A rack 507 is slidably installed below the gear 508. A pin 509 is fixedly installed at the end of the rack 507. The anti-theft locking mechanism 5 also includes a positioning sleeve 505 fixedly installed inside the mounting bracket 501 and a limiting groove 504 opened on the valve stem 3. A first spring 506 is provided inside the positioning sleeve 505. Bolts are provided at the bottom of the mounting bracket 501. The mounting bracket 501 is fixedly installed on the butterfly valve body 1 by bolts. The valve plate 4 is rotatably installed inside the butterfly valve body 1 by the valve stem 3.

[0025] Specifically, when handwheel 2 is pressed down, it causes connecting sleeve 601 to move downwards, which causes lock cap 605 to disengage from lock hole 604. Once lock cap 605 is disengaged from lock hole 604, handwheel 2 can be rotated freely to control the movement of valve stem 3. As valve stem 3 moves, valve plate 4 will open, at which point handwheel 2 can be released. After releasing handwheel 2, second spring 602 will automatically push connecting sleeve 601 upwards, causing lock cap 605 to re-embed into lock hole 604, thereby locking connecting sleeve 601. Once connecting sleeve 601 is locked, it restricts the rotation of square rod 603, thus ensuring the locked state of valve stem 3 and preventing unnecessary deflection of valve plate 4.

[0026] like Figure 2 and Figure 5 As shown, the ordinary locking mechanism 6 includes a connecting sleeve 601 slidably installed at the upper end of the valve stem 3 and a locking hole 604 opened on the mounting frame 501. A square rod 603 is fixedly installed at the upper end of the valve stem 3. A second spring 602 is provided at the upper end of the connecting sleeve 601. A positioning ring seat 606 is fixedly installed on the connecting sleeve 601. A locking cap 605 is fixedly installed on the positioning ring seat 606. A sealing ring 607 is fixedly installed at the lower edge of the connecting sleeve 601. A square groove is opened in the connecting sleeve 601. The square rod 603 is slidably installed in the connecting sleeve 601 through the square groove.

[0027] Specifically, when the valve plate 4 is in the open position, the first spring 506 applies force to push the rack 507 forward. As the rack 507 moves forward, it further drives the pin 509 forward. This forward-moving pin 509 eventually inserts precisely into the limiting groove 504 on the valve stem 3. In this way, the limiting groove 504 effectively restricts the rotation of the valve stem 3, thereby ensuring that the valve plate 4 remains in the locked state. To unlock and regain control of the valve, the user needs to perform a specific operation: inserting the key into the spring lock cylinder 502. Once the key is correctly inserted and rotated, it will cause the latch 503 to rotate. The rotation of the latch 503 will further drive the gear 508 to start rotating. The rotation of the gear 508 will act in the opposite direction on the rack 507, causing it to move backward. As the rack 507 retracts, the pin 509 will also disengage from the limiting groove 504. By using a key to unlock valve stem 3, unauthorized personnel can be effectively prevented from operating the valve, ensuring valve safety and the exclusivity of control.

[0028] Working principle: When the valve plate 4 is in the open state, the first spring 506 pushes the rack 507 forward. After the rack 507 moves forward, it drives the pin 509 forward. The forward-moving pin 509 eventually inserts into the limiting groove 504 on the valve stem 3, thereby restricting the rotation of the valve stem 3 and locking the valve plate 4. The user can only turn the latch 503 by inserting the key into the spring lock cylinder 502. After turning the latch 503, it drives the gear 508 to rotate. After the gear 508 rotates, it drives the rack 507 to move backward, thereby causing the pin 509 to disengage from the limiting groove 504. The valve stem 3 can then be unlocked using the key, preventing outsiders from arbitrarily controlling the valve to open. After pressing down the handwheel 2, it will drive the connecting sleeve 601 to move downward, causing the lock cap 605 to disengage from the lock hole 604. After the lock cap 605 disengages from the lock hole 604, the valve stem 3 can be rotated using the handwheel 2, thereby controlling the valve plate 4 to open. After the valve plate 4 is opened, the handwheel 2 can be released. After releasing the handwheel 2, the second spring 602 will push the connecting sleeve 601 to move upward, causing the lock cap 605 to embed into the lock hole 604, thereby locking the connecting sleeve 601. After the connecting sleeve 601 is locked, it will restrict the rotation of the square rod 603, thereby locking the valve stem 3 and preventing the valve plate 4 from deflecting arbitrarily.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A butterfly valve with a locking structure, comprising a butterfly valve body (1), wherein a valve stem (3) is rotatably mounted inside the butterfly valve body (1), a valve plate (4) is fixedly mounted on the valve stem (3), and a handwheel (2) is connected to the upper end of the valve stem (3), characterized in that: An anti-theft locking mechanism (5) is installed on the butterfly valve body (1). The anti-theft locking mechanism (5) includes a mounting frame (501) fixedly installed on the butterfly valve body (1). A spring lock core (502) is fixedly installed inside the mounting frame (501). A lock tongue (503) is provided on the spring lock core (502). A gear (508) is fixedly installed on the lock tongue (503). A rack (507) is slidably installed below the gear (508). A pin (509) is fixedly installed at the end of the rack (507). A common locking mechanism (6) is provided between the mounting frame (501) and the valve stem (3).

2. A butterfly valve with a locking structure according to claim 1, characterized in that: The anti-theft locking mechanism (5) also includes a positioning sleeve (505) fixedly installed in the mounting frame (501) and a limiting groove (504) opened on the valve stem (3). The positioning sleeve (505) is provided with a first spring (506).

3. A butterfly valve with a locking structure according to claim 2, characterized in that: The mounting bracket (501) is provided with bolts at the bottom. The mounting bracket (501) is fixedly installed on the butterfly valve body (1) by bolts. The valve plate (4) is rotatably installed inside the butterfly valve body (1) by the valve stem (3).

4. A butterfly valve with a locking structure according to claim 3, characterized in that: The gear (508) is rotatably mounted above the rack (507) via the locking tongue (503), and the gear (508) meshes with the rack (507). The rack (507) is movably mounted inside the mounting frame (501) via the positioning sleeve (505). One end of the first spring (506) is connected to the rack (507), and the other end of the first spring (506) is connected to the bottom of the positioning sleeve (505).

5. A butterfly valve with a locking structure according to claim 4, characterized in that: The ordinary locking mechanism (6) includes a connecting sleeve (601) slidably installed at the upper end of the valve stem (3) and a locking hole (604) opened on the mounting frame (501). A square rod (603) is fixedly installed at the upper end of the valve stem (3). A second spring (602) is provided at the upper end of the connecting sleeve (601). A positioning ring seat (606) is fixedly installed on the connecting sleeve (601). A lock cap (605) is fixedly installed on the positioning ring seat (606). A sealing ring (607) is fixedly installed at the lower edge of the connecting sleeve (601).

6. A butterfly valve with a locking structure according to claim 5, characterized in that: A square groove is provided inside the connecting sleeve (601), and the square rod (603) is slidably installed inside the connecting sleeve (601) through the square groove.

7. A butterfly valve with a locking structure according to claim 6, characterized in that: One end of the second spring (602) is connected to the top of the connecting sleeve (601), and the other end of the second spring (602) is connected to the upper end of the square rod (603). The lock cap (605) is fixedly installed around the connecting sleeve (601) through the positioning ring seat (606). The handwheel (2) is installed at the upper end of the valve stem (3) through the connecting sleeve (601).

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