Controllable valve rod type valve for heat supply system

Abstract

The utility model belongs to hot equipment for heat supply in the building industry, and particularly relates to a controllable valve rod type valve for a heat supply system. The lock body is fixedly arranged in a pipe opening in the right side of the valve body, a lock cylinder is arranged in the lock body and located on the outer side of the valve rod, a lock body chip, a lock body contact and a clutch mechanism are arranged in the lock cylinder, the clutch mechanism is in linkage connection with two limiting columns, two pairs of limiting column grooves are formed in the positions, corresponding to the two limiting columns, of the valve rod, and a battery and a controller are further arranged in the unlocking body. Wherein the controller comprises a communication unit, a Bluetooth device, a storage unit, a control chip, an identification unit and a buzzer, and the controller communicates with the lock body chip. The chip is additionally arranged in the lock body, the clutch mechanism is controlled through a chip program of the lock body, so that opening and closing of the valve rod are controlled, control over fluid by the ball core can be systematically controlled, a heat supply valve cannot be easily and mechanically opened, the control efficiency of a heating system is improved, and loss of a heat source is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the building industry heat supply, especially relates to a controllable valve stem formula valve for heat supply system. BACKGROUND

[0002] In the heating period in northern China, the heating company adopts the control mode of '' one valve for one household '' to the heating user. Our company applied for the patent with the name '' laser anti-theft lock valve for heat supply system '' in 2018, and the patent number is '' 2018210519526 ''. This product has been widely used in the heat supply system. The effective control of the heat supply valve greatly reduces the heat source loss of the heating company. However, the structural features of this product have been disclosed, and it is not complex, which can be easily cracked by people. In addition, the internal staff with the unlocking permission can open the lock valve at will, and there is no trace to check, which brings trouble to the management in this aspect. With the passage of time, the heat source loss of the heating company has again shown signs of increase. SUMMARY

[0003] The utility model aims at overcoming the above technical insufficient, provides a kind of controllable valve stem formula valve for heat supply system with simple structure, and the management of heating valve is more effective.

[0004] The controllable stem valve for heating systems has a spherical envelope located at the center of the valve body. Inside the spherical envelope is a ball core, and at the center of the right end face of the ball core is a stem hole through which the valve stem passes. A key feature is the inclusion of a lock body, fixed within the pipe opening on the right side of the valve body. The valve stem is housed within the lock body, concentric with the lock body, and its right end face is flush with the right end face of the lock body. A keyhole is located on the right end face of the valve stem, into which a valve stem key is inserted. A lock cylinder is located within the lock body, outside the valve stem. The lock cylinder contains a lock body chip, lock body contacts, and a clutch mechanism. Two lock body contacts are located on the right end face of the lock body and connect to the lock body chip. The lock body chip connects to the clutch mechanism, which is controlled by a program. The clutch mechanism is linked to two limit posts. Two pairs of limit post grooves are provided on the valve stem at positions corresponding to the two limit posts, with an included angle of 90 degrees between the two pairs of limit post grooves. An unlocking body contact is provided on the left end face of the unlocking body, matching and connecting to the lock body contact. The unlocking body also contains a battery and a controller. The controller includes a communication unit, a Bluetooth device, a storage unit, a control chip, an identification unit, and a buzzer. The battery powers the unlocking body contact and the controller. The control chip in the controller connects to and programs the communication unit, Bluetooth device, storage unit, identification unit, and buzzer. The controller communicates with the lock body chip. A valve stem baffle is provided on the outer wall of the left side of the valve stem, located to the right of the valve stem hole. Two valve body limit baffles are provided on the inner wall of the valve body at positions corresponding to the valve stem baffle, with an included angle of 90 degrees between the extended lines of the two valve body limit baffles towards the center. The valve stem baffle is located within the 90-degree range of the two valve body limit baffles.

[0005] The beneficial effects of this utility model are as follows: The controllable valve stem type valve used in the heating system has a compact structure and is easy to operate. A chip is added to the lock body, and the clutch mechanism is controlled by the chip program, thereby controlling the opening and closing of the valve stem. This allows for systematic control of the fluid flow by the ball core, preventing the heating valve from being easily opened mechanically. A controller is installed in the unlocking body. Through the use of radio frequency technology, only authorized unlocking bodies can successfully match with locks within their authorized range to open the heating valve. The heating company's management department can manage the scope of control, access time, and specific operators of the unlocking bodies through software programs and the system platform. Even if an unlocking body is lost, it will no longer have the function of opening the heating valve. The interaction and communication between the chip in the lock body and the controller in the unlocking body ensures that all opening and closing information is transmitted back to the management platform. This not only standardizes the work status and access rights of employees within the heating company but also monitors the correct heating status of each heating user, achieving closed-loop management, effectively improving the management efficiency of the heating system, and reducing heat source loss. Attached Figure Description

[0006] The following description, in conjunction with the accompanying drawings, illustrates specific embodiments.

[0007] Figure 1 This is a structural front view of a controllable stem valve used in a heating system.

[0008] Figure 2 yes Figure 1 Enlarged view of point I.

[0009] Figure 3 yes Figure 1 AA view.

[0010] Figure 4 yes Figure 1 BB view.

[0011] Figure 5 yes Figure 1 The P-direction view.

[0012] Figure 6 This is a structural view of the unlocking mechanism.

[0013] Figure 7 yes Figure 6 The left-side view.

[0014] Figure 8 This is a schematic diagram illustrating the interaction and communication between the unlocking body and the lock body.

[0015] Figure 9 This is a structural view showing the lock body and valve stem key connected as one unit.

[0016] Figure 10 yes Figure 9 The left-side view.

[0017] In the diagram, 1-valve body; 1-2-valve body limiting baffle; 2-ball-shaped body cover; 3-ball-shaped body; 4-ball core; 4-1-valve stem hole; 5-sealing ring; 6-valve stem; 6-1-valve stem keyhole; 6-2-valve stem baffle; 6-3-limiting post groove; 7-lock body; 7-1-lock cylinder; 7-1-1-lock body chip; 7-1-2-electromagnet; 7-1-3-limiting post; 7-1-4-hinge shaft; 7-1-5-reset spring; 7-2-lock body contact; 8-unlocking body; 8-1-unlocking body contact; 9-valve stem key; 9-1-bearing; 9-2-bearing sleeve; 9-3-handle. Detailed Implementation

[0018] In Example 1, referring to the accompanying drawings, the controllable stem valve for the heating system has a ball-shaped body 3 located at the center inside the valve body 1. A ball-shaped body cap 2 is located above the ball-shaped body 3 within the valve body 1, and the cap 2 is tightly fitted to the body 3, limiting its movement. A ball core 4 is located inside the ball core 3, and a valve stem hole 4-1 is located at the center of the right end face of the ball core 4. A valve stem 6 passes through the valve stem hole 4-1. Rotation of the valve stem 6 causes the ball core 4 to rotate, controlling the flow of fluid within the valve. A lock body 7 is also provided, fixedly located inside the pipe opening on the right side of the valve body 1. The valve stem 6 passes through the lock body 7, with the valve stem 6 and lock body 7 sharing the same center. The valve stem 6 can rotate within the lock body 7. The right end face of the valve stem 6 is flush with the right end face of the lock body 7. A valve stem keyhole 6-1 is located at the rightmost end of the valve stem 6. A lock cylinder 7-1 is provided inside the lock body 7. The lock cylinder 7-1 is located outside the valve stem 6 and directly above the valve stem 6. The lock cylinder 7-1 contains a lock body chip 7-1-1, lock body contacts 7-2, and a clutch mechanism. Two lock body contacts 7-2 are located on the right end face of the lock body 7 and are connected to the lock body chip 7-1-1. The lock body chip 7-1-1 is connected to the clutch mechanism, which controls the opening and closing of the clutch mechanism. The clutch mechanism is linked to the locking device. In this embodiment, the locking device consists of two limiting posts 7-1-3. A valve stem limiting device is provided on the valve stem 6 at a position corresponding to the locking device, i.e., the two limiting posts 7-1-3. In this embodiment, the valve stem limiting device consists of two pairs of limiting post grooves 6-3, and the included angle between the two pairs of limiting post grooves 6-3 is 90 degrees. This is because when the valve stem 6 rotates the ball core 4, the angle controlled by the ball core 4 on the fluid in the pipeline is exactly 90 degrees. The two limiting posts 7-1-3 can stay in each pair of limiting post grooves 6-3 for locking and limiting.The clutch mechanism includes an electromagnet 7-1-2, which is installed inside the lock cylinder 7-1. The left ends of the two limit posts 7-1-3 are equipped with hinge pins 7-1-4, which are mounted on the lock cylinder 7-1. The limit posts 7-1-3 can rotate around the hinge pins 7-1-4. Return springs 7-1-5 are connected to the two limit posts 7-1-3, with the other end connected to the lock cylinder 7-1. When the lock body 7 is not energized, the electromagnet 7-1-2 has no magnetism, and the spring force of the return springs 7-1-5 ejects the two limit posts 7-1-3, causing them to stand upright and rest against the upright end face of the valve stem limit post groove 6-3. The upright end face of the valve stem limit post groove 6-3 limits the two limit posts 7-1-3. -1-3 thus limits the valve stem 6, preventing it from rotating radially. The inability of the valve stem 6 to rotate limits the ball core 4, controlling the flow and closure of fluid in the pipeline. When the lock body chip 7-1-1 inside the lock body 7 is powered, the program controls the electromagnet 7-1-2 to be energized. The electromagnet 7-1-2 becomes magnetic. Since the two limiting posts 7-1-3 are metallic, the magnetic force of the electromagnet 7-1-2 is greater than the elastic force of the return spring 7-1-5, compressing the return spring 7-1-5 and magnetically attracting the two limiting posts 7-1-3 to a horizontal position, thus disengaging them from the valve stem limiting post groove 6-3 and releasing the limitation on the valve stem 6. At this point, inserting the valve stem key into the valve stem keyhole 6-1 allows the valve stem 6 to be rotated, thereby driving the ball core 4 to control the opening and closing of fluid in the pipeline. It also includes an unlocking body 8, with an unlocking body contact 8-1 on the left end face of the unlocking body 8. The unlocking body contact 8-1 is in contact with the lock body contact 7-2. The unlocking body 8 also includes a battery and a controller, wherein the controller includes a communication unit, a Bluetooth device, a storage unit, a control chip, an identification unit, and a buzzer. The battery powers the unlocking body contact 8-1 and the controller. When the battery starts supplying power, the control chip in the controller connects to and controls the communication unit, Bluetooth device, storage unit, identification unit, and buzzer. The unlocking body 8 first connects to the backend operating system via the Bluetooth device. The Bluetooth device can also connect to the mobile APP. The mobile APP and the backend operating system have the same functions. The unlocking body 8 obtains the corresponding authorization, which includes the unlocking range and the effective time of the unlocking body. Because the valve opening time during the winter heating season is generally very short, concentrated within one or two weeks to complete the valve opening operation for paying users, the effective time of authorization is limited to this period. At other times, the unlocking body is in a blocked state, thereby achieving the purpose of controlling the authorization of the on-site valve opening personnel. If there are special requirements or special time periods that require additional valve opening, this is a low-probability event. In this case, temporary authorization for one day and specifying the authorization of specific points can complete the work.After the staff receives authorization from the unlocking body 8, the authorization information is recorded in the storage unit. The two unlocking body contacts 8-1 of the unlocking body 8 are then connected to the two lock body contacts 7-2. The power in the battery is connected through the contact between the unlocking body contacts 8-1 and the lock body contacts 7-2, supplying power to the lock body chip 7-1-1. The lock body chip 7-1-1 is then activated and put into working condition. The communication unit in the unlocking body 8 begins to communicate with the lock body chip 7-1-1. The identification unit in the unlocking body 8 sends a signal to identify the position information in the lock body chip 7-1-1. When the identified position information is not within the authorization of this unlocking body, the buzzer sounds, and the lock body chip 7-1-1 does not trigger the opening operation of the clutch mechanism. The two limit posts 7-1-3 continue to be limited in their corresponding limit post slots 6-3. When the identification signal emitted by the identification unit interacts with the lock body chip 7-1-1 through the communication unit, and the lock body chip information at this point is within the authorized scope of this unlocking body, the buzzer emits another sound. At the same time, the lock body chip 7-1-1 triggers a signal program to control the clutch mechanism to perform an opening operation. The electromagnet 7-1-2 of the clutch mechanism is energized. The electromagnet 7-1-2 attracts the two limit posts 7-1-3 through magnetic force. The magnetic force of the electromagnet 7-1-2 is greater than the elastic force of the return spring 7-1-5. The two limit posts 7-1-3 leave the limit post groove 6-3 and are attracted by the magnetic force of the electromagnet 7-1-2. At this time, the clutch mechanism releases the limit device in the valve stem 6 from the limit lock on the two limit posts 7-1-3, thereby releasing the limit lock on the valve stem 6, and the valve stem 6 can rotate.

[0019] A valve stem baffle 6-2 is provided on the outer wall of the left side of the valve stem 6. The valve stem baffle 6-2 is located to the right of the valve stem hole 4-1. On the inner wall of the valve body 1, corresponding to the valve stem baffle 6-2, two valve body limiting baffles 1-2 are provided. One valve body limiting baffle 1-2 is located at the top of the inner wall of the valve body, and the other valve body limiting baffle 1-2 is located at the rightmost end of the inner wall of the valve body. The two valve body limiting baffles 1-2 do not affect the rotation of the valve stem 6. The two valve body limiting baffles 1-2 are oriented in a circular direction. The angle between the extended lines of the valve stem is 90 degrees. The valve stem baffle 6-2 is located within the 90-degree range of the two valve body limiting baffles 1-2. When the valve stem 6 rotates to the position of the right valve body limiting baffle 1-2, this valve body limiting baffle 1-2 limits the valve stem baffle 6-2 on the outer wall of the valve stem 6, preventing the valve stem 6 from rotating clockwise. When the valve stem 6 rotates in reverse to the position of the uppermost valve body limiting baffle 1-2, this valve body limiting baffle 1-2 limits the valve stem baffle 6-2 on the outer wall of the valve stem 6. The valve stem baffle 6-2 limits the valve stem 6, preventing it from rotating counterclockwise. This allows the valve stem 6 to rotate within a 90-degree arc. When the valve stem baffle 6-2 is limited by the valve body limiting baffle 1-2 directly above it, one pair of limiting grooves 6-3 are directly above the valve stem 6, and the other pair of limiting grooves 6-3 are directly to the left of the valve stem 6. This is because when the valve stem 6 rotates and drives the ball core 4, the two angles of the ball core 4 being fully open and fully closed are exactly 90 degrees apart. Without the limiting of the valve body limiting baffle 1-2, it would be difficult to control the position of the ball core 4 when rotating the valve stem 6, making it prone to interference or under-interference. This could result in the ball core 4 not being fully open or fully closed. If it is not fully open, it will affect the heating effect. If it is not fully closed, during the non-heating season, the fluid in the heating pipes may flow back into the user's indoor heating pipes, which has caused flooding in some homes. Therefore, the combined use of valve body limiting baffle 1-2 and valve stem baffle 6-2 to control the angle of valve stem 6 ensures that the ball core 4 is fully open and fully closed within a 90-degree range. The positions of the two valve body limiting baffles 1-2 are not limited to the upper right quadrant of the inner wall of the right side of the valve body 6. Regardless of their angle, as long as they can limit the valve stem key from turning the valve stem 6 so that the ball core 4 rotates only 90 degrees, it is acceptable.

[0020] In this embodiment, the lock cylinder 7-1-1 is positioned directly above the valve stem 6, and the two valve body limiting baffles 1-2 are located directly above and to the right of the inner wall of the valve body 1. When the valve stem baffle 6-2 is limited by the valve body limiting baffle 1-2 directly above it, a pair of limiting grooves 6-3 are directly above the valve stem 6, and another pair of limiting grooves 6-3 are directly to the left of the valve stem 6. This combination of positional relationships is limited to controlling the ball core 4 to rotate exactly 90 degrees and limiting it. In the open and closed positions, the lock cylinder 4 can limit and lock the valve stem 6, thereby ensuring that the ball core 4 is fully open and fully closed. However, in actual production, it is not limited to this combination of positional relationships. Alternatively, the lock cylinder 7-1-1 can be located inside the lock body 7 on the left side of the valve stem 6. The valve body limiting baffles 1-2 are positioned directly to the left and below the inner wall of the valve body 1. The valve stem baffle 6-2 is positioned within a 90-degree angle range between the two valve body limiting baffles 1-2. When the valve stem baffle 6-2 is limited by the valve body limiting baffle 1-2 to the left, one pair of limiting grooves 6-3 are directly to the left of the valve stem 6, and the other pair of limiting grooves 6-3 are directly above the valve stem 6. In short, multiple combinations can achieve the function of this application, thereby controlling the opening and closing of the valve stem 6. These positional combinations are all within the scope of protection of this application.

[0021] The working principle of the controllable stem valve in the heating system in Example 1 is as follows: The lock cylinder 4 is located inside the lock body 7 directly above the valve stem 6. The unlocking contact 8-1 of the authorized unlocking body 8 is brought into contact with the lock body contact 7-2. The lock body chip 7-1-1 is powered on and activated, and the electromagnet 7-1-2 pulls the two lock body limiting posts 7-1-3 out of the valve stem limiting post groove 6-3. The lock body limiting posts 7-1-3 release the limiting of the valve stem 6. The valve stem key 9 is inserted into the valve stem keyhole 6-1 and rotated clockwise, causing the valve stem 6 to rotate. The valve stem 6 causes the ball core 4 to rotate. When the valve stem baffle 6-2 is limited by the valve body limiting baffle 1-2 on the right, the valve stem key 9 can no longer rotate clockwise. At this time, the ball core 4 is in a completely closed state. Before the valve stem key 9 rotates, the pair of limiting post slots 6-3 located to the left of the valve stem 6 are now above the valve stem 6. Pull out the valve stem key 9, then separate the unlocking body 8 from the lock body 7. The lock body chip 7-1-1 is de-energized, the electromagnet 7-1-2 loses its magnetism, and the return spring 7-1-5 ejects the two limiting posts 7-1-3, causing them to stand upright against the two limiting post slots 6-3 below them, thus locking the valve stem 6 and preventing it from rotating. The ball core 4 closes, putting the heating valve in the closed state. The control chip in the unlocking body 8 controls the communication unit to work, enabling communication between the unlocking body 8 and the lock body 7. The identification unit in the unlocking body 8 identifies the information at this point and then transmits the closed information to the storage unit of the unlocking body 8 for storage. When all residents have operated the valve to close, the unlocking body is taken back to the system control center, and all information is transmitted to the backend control system via Bluetooth or a mobile APP. Before the heating season begins, the number of users who have paid their fees is tallied and recorded in the management system. The mobile app or the back-end management system authorizes each lock via Bluetooth. The permissions of each lock include the scope of the employee using the lock, the location information of users who have paid their fees within the jurisdiction, and the time limit for using the lock. All of this information is stored in the storage unit of the lock. Users who have not paid their heating fees will not have the right to unlock this lock.The employee uses the unlocking device 8 to open the valve for paid users. The battery in the unlocking device 8 powers the unlocking device contacts 8-1 and the controller. The control chip in the controller connects to and controls the communication unit, Bluetooth device, storage unit, identification unit, and buzzer. Connecting two contacts of the unlocking device 8 to the two lock body contacts 7-2 on the lock body 7 powers the lock body chip 7-1-1, activating the lock body chip 7-1-1 and putting it into working mode. The communication unit in the unlocking device 8 then begins communication with the lock body chip 7-1-1. In the interactive communication process, the identification unit in the unlocking body 8 sends a signal to identify the position information in the lock body chip 7-1-1. When the identified position information is not within the authorization of this unlocking body 8, the buzzer sounds, and the lock body chip 7-1-1 does not trigger the opening operation of the clutch mechanism. The two limit posts 7-1-3 continue to be limited in their corresponding limit post slots 6-3. When the identification signal sent by the identification unit interacts with the lock body chip 7-1-1 through the communication unit, the information of the lock body chip 7-1-1 at this position belongs to this unlocking body 8. When the object is within the authorized range, the buzzer emits a different sound, and simultaneously, the lock body chip 7-1-1 triggers a signal to control the clutch mechanism to perform an opening operation. At this time, the electromagnet 7-1-2 is energized, and the magnetic force pulls the two limit pins 7-1-3 out of the limit pin slots 6-3. The limit pins 7-1-3 release their restriction on the valve stem 6. When the valve stem key 9 is inserted into the valve stem keyhole 6-1 and rotated 90 degrees counterclockwise, the valve stem baffle 6-2 is now restricted by the valve body limit baffle 1-2 directly above it, preventing it from continuing to rotate counterclockwise. The valve stem key 9 drives the valve stem 6, causing the ball core 4 to rotate 90 degrees, fully opening the ball core 4 and allowing the heating fluid to flow, thus completing the valve opening and heating operation. The valve stem key 9 is then removed from the valve stem keyhole 6-1, separating the unlocking body 8 from the lock body 7. The lock body chip 7-1-1 is de-energized, the electromagnet 7-1-2 loses its magnetism, and the return spring 7-1-5 resets, causing the two limit pins 7-1-3 to pop out and stand upright in the two limit pin slots 6-3 below it, thereby locking and limiting the valve stem 6. The communication unit of the unlocking body 8 transmits the successful valve opening information to the storage unit. After completing their work within their assigned area, employees hand over the unlocking device 8 and upload the information from the storage unit to the management system via Bluetooth. Managers can then analyze this information using the management software to determine whether all paid users have had their valves turned on for heating, what the situation is for users who have paid but haven't had their valves turned on (whether staff haven't been on-site to turn on the valves or if there's a valve malfunction at that user's location), and whether users who haven't paid have had their valves turned on. Based on this aggregated information, the management can analyze the heating system's operation, thus achieving efficient control.

[0022] Example 2, see attached document Figures 1-10The unlocking body 8 and the valve stem key 9 can be integrated as a single unit, unlike in Embodiment 1 where they are separate. Separate installation requires one hand to hold the unlocking body 8 and the other to hold the valve stem key 9, inserting it into the valve stem keyhole 6-1 to rotate the valve stem 6 for locking and unlocking, which is cumbersome. The valve stem key is integrally connected below the unlocking body contact 8-1 on the left side of the unlocking body 8. The upper unlocking body contact 8-1 is inserted into the recessed lock body contact 7-2 and cannot rotate. The lower valve stem key 9 is simultaneously inserted into the valve stem keyhole 6-1 side-by-side, with the protruding part of the valve stem key 9 extending forward. The outer ring of the valve stem key 9 has a bearing 9-1, and outside the bearing 9-1 is a bearing sleeve 9-2. The bearing sleeve 9-2 and the controller part of the unlocking body 8 above it are fixedly connected together to form a single unlocking body. The tail end of the valve stem key 9 has a handle 9-3. When the unlocking body 8 has the necessary permissions, the contacts in the unlocking body contacts 8-1 are inserted into the lock body contacts 7-2. The two recessed lock body contacts 7-2 lock the two unlocking body contacts 8-1, keeping them stationary. The unlocking body controller supplies power to the lock body chip 7-1-1 through the unlocking body contacts 8-1, causing the lock body chip 7-1-1 to operate. Simultaneously, the valve stem key 9, integrated below the unlocking body controller, is inserted into the valve stem keyhole 6-1. Then, by rotating the handle 9-3 at the end of the valve stem key, the valve stem key 9 will rotate within its external bearing 9-1. At this time, the unlocking body contacts 8-1 are inserted into the lock body contacts 7-2. The unlocking body contacts 8-1 and the unlocking body controller connected to the back remain stationary. This allows for simultaneous unlocking and valve stem rotation, eliminating the cumbersome separate operation method.

[0023] In Example 3, a lock body 7 is fixedly connected inside the valve body 1. The lock body 7 contains a lock cylinder 7-1 and a lock body contact 7-2. The lock cylinder 7-1 contains a lock body chip 7-1-1, a clutch mechanism, and a locking device. The lock body contact 7-2 is connected to the lock body chip 7-1-1, and the lock body chip 7-1-1 is connected to the clutch mechanism. The lock body chip 7-1-1 performs program control on the clutch mechanism, controlling its opening and closing. The clutch mechanism is linked to the locking device, which is a lock ball. A limiting device is provided on the valve stem, which is a limiting hole that cooperates with the lock ball. The lock ball is controlled by the linkage connection of the clutch mechanism inside the lock body and locks into the limiting hole of the valve stem 6. By limiting the limiting hole, the rotation of the valve stem 6 is controlled. The communication relationship between the unlocking body 8 and the lock body 7 is the same as in Example 1.

[0024] The specific connection and linkage relationships between the lock body chip, clutch mechanism, and locking device inside the lock cylinder in this embodiment will not be described in detail here. Firstly, these are not within the scope of this application's main protection, and secondly, too many technical solutions and structural features in this regard have already been disclosed in the prior art. These are already well-known technologies familiar to those skilled in the art. For specific solutions, please refer to the patent application entitled "A Multi-mode Smart Door Lock" with patent number "2018115253025" and the patent application entitled "An Electronic Lock Cylinder and Electronic Lock" with patent number "2020104063293".

[0025] Example 4. In Examples 1-3, a locking device is installed on the lock body and a limiting device is installed on the valve stem. The positions can also be reversed, that is, a lock cylinder and locking device are installed on the valve stem and a limiting device is installed on the lock body. However, the idea is the same. They all involve non-mechanical operation of the valve stem to facilitate system control of the heating valve. The technical problems they solve are the same. They are just different in terms of structural position. In order not to waste relevant resources and not to create abnormal patent applications, no additional patent application will be filed here. However, such structural features are all within the scope of protection of this application.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A controllable stem valve for a heating system, comprising a valve body (1) and a valve stem (6), characterized in that, A lock body (7) is fixedly connected inside the valve body (1). A lock cylinder (7-1) is provided inside the lock body (7). A lock body chip (7-1-1), a clutch mechanism, and a locking device are provided inside the lock cylinder (7-1). The lock body chip (7-1-1) is connected to the clutch mechanism. The lock body chip (7-1-1) controls the opening and closing of the clutch mechanism. The clutch mechanism is linked to the locking device. A valve stem (6) is installed inside the lock body (7). A limiting device for limiting the locking device is provided on the valve stem (6). The left end of the valve stem (6) is connected to the ball core (4). The rightmost end of the valve stem is provided with a valve stem keyhole (6-1). A controller is provided on the unlocking body (8). The controller communicates with the lock body chip (7-1-1) on the lock body (7).

2. The controllable stem valve for a heating system according to claim 1, characterized in that, A lock body contact (7-2) is provided on the right end face of the lock body (7). One end of the lock body contact (7-2) is connected to the lock body chip (7-1-1). An unlocking body contact (8-1) is provided at the front end of the unlocking body (8). The unlocking body contact (8-1) is connected to the other end of the lock body contact (7-2). A battery and a controller are also provided in the unlocking body (8). The controller includes a communication unit, a Bluetooth device, a storage unit, a control chip, an identification unit, and a buzzer. The battery supplies power to the controller and the unlocking body contact. The control chip in the controller is connected to the communication unit, the Bluetooth device, the storage unit, the identification unit, and the buzzer and controls them.

3. The controllable stem valve for a heating system according to claim 2, characterized in that, The locking device on the lock cylinder (7-1) consists of two limiting pins (7-1-3), and the limiting device on the valve stem (6) consists of two pairs of limiting pin grooves (6-3). The included angle between the two pairs of limiting pin grooves (6-3) is 90 degrees. The positions of the two pairs of limiting pin grooves (6-3) and the two limiting pins (7-1-3) correspond to each other. The two limiting pins (7-1-3) can be respectively erected in the two pairs of limiting pin grooves (6-3) for locking and limiting.

4. The controllable stem valve for a heating system according to claim 3, characterized in that, The lock cylinder (7-1) is located outside the valve stem (6). The clutch mechanism inside the lock cylinder (7-1) contains an electromagnet (7-1-2). The electromagnet (7-1-2) is installed inside the lock cylinder (7-1). The left end of the two limit posts (7-1-3) is provided with a hinge (7-1-4). The hinge (7-1-4) is installed on the lock cylinder (7-1). The limit posts (7-1-3) rotate around the hinge (7-1-4). The two limit posts (7-1-3) are connected to a return spring (7-1-5). The other end of the return spring (7-1-5) is connected to the lock cylinder (7-1). The lock body chip (7-1-1) is connected to the electromagnet (7-1-2) to control the electromagnet (7-1-2). The electromagnet (7-1-2) controls the horizontal and vertical positions of the two limit posts (7-1-3).

5. The controllable stem valve for a heating system according to claim 1, characterized in that, A valve stem baffle (6-2) is provided on the outer wall of the left side of the valve stem (6). The valve stem baffle (6-2) is located on the right side of the valve stem hole (4-1). Two valve body limiting baffles (1-2) are provided on the inner wall of the valve body (1) at the position corresponding to the valve stem baffle (6-2). The included angle between the two valve body limiting baffles (1-2) and the center extension line is 90 degrees. The valve stem baffle (6-2) is located within the 90-degree range of the two valve body limiting baffles (1-2).

6. The controllable stem valve for a heating system according to claim 5, characterized in that, One valve body limiting baffle (1-2) is located at the top of the inner wall of the valve body (1) pipe, and another valve body limiting baffle (1-2) is located at the rightmost end of the inner wall of the valve body (1) pipe. The lock core (7-1) is located directly above the valve stem (6). When the valve stem baffle (6-2) is located directly above the valve stem (6), it is limited by the uppermost valve body limiting baffle (1-2). At this time, a pair of limiting grooves (6-3) are located above the valve stem (6), and another pair of limiting grooves (6-3) are located on the left side of the valve stem (6).

7. The controllable stem valve for a heating system according to claim 2, characterized in that, The locking device on the lock cylinder (7-1) is a lock ball. A limiting device is provided on the valve stem (6). The limiting device is a limiting hole that cooperates with the lock ball. The lock ball is controlled by the linkage connection of the clutch mechanism inside the lock body (7). The lock ball is locked into the limiting hole of the valve stem (6) to limit the rotation of the valve stem (6).

8. The controllable stem valve for a heating system according to claim 2, characterized in that, Two unlocking contacts (8-1) are inserted into two lock contacts (7-2), and the two lock contacts (7-2) are recessed inward. The forward-protruding part of the valve stem key is inserted into the valve stem keyhole (6-1). The valve stem key (9) is provided with a bearing (9-1), and the bearing (9-1) is provided with a bearing sleeve (9-2). The bearing sleeve (9-2) and the controller part of the unlocking body above it are fixedly connected together to form an integral unlocking body. The tail end of the valve stem key (9) is provided with a handle (9-3).

9. The controllable stem valve for a heating system according to claim 2, characterized in that, The lock body chip (7-1-1) in the lock body (7) records the location information of the heating user. After the lock body chip (7-1-1) is powered on, the control chip in the unlocking body (8) controls the communication unit to communicate with the lock body chip (7-1-1). The control chip controls the identification unit to identify the lock body chip (7-1-1), and the storage unit stores the operation information.

10. The controllable stem valve for a heating system according to claim 2, characterized in that, The Bluetooth device in the unlocking body (8) is connected to the background monitoring system platform, and the Bluetooth device in the unlocking body (8) is connected to the mobile APP.

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