Heating and ventilation leakage-proof valve

Abstract

The utility model belongs to the technical field of heating and ventilation valves, and particularly discloses a heating and ventilation leakage-proof valve which is used for solving the technical problems that a heating and ventilation valve is complex in structure, complex in machining and assembling step sequence, inconvenient to replace and maintain and poor in unblocking effect every time. Comprising a guide shaft arranged in a valve body, a bottom cover is installed at the bottom of the valve body in a threaded mode, a valve cover is installed at the top of the valve body in a threaded mode, a flow guide valve element is fixedly installed at the inner bottom, corresponding to the valve cover, of the valve body, an adjusting valve element is movably installed at the inner top of the valve cover, and the outer side, close to the inner bottom of the flow guide valve element, of the guide shaft is sleeved with a floating valve element. Therefore, adjustment of turn-off flow can be rapidly achieved by changing the relative position between the adjusting valve element and the floating valve element, the full-automatic anti-leakage function of the heat supply system can be achieved in the mode that the structure is compact and the structure number is simplified, and operation convenience is provided after the heat supply system uses the anti-leakage valve through matched use of the adjusting valve element and the floating valve element. And the processing and assembling steps are simplified, and the maintenance and unblocking efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of HVAC valves, in particular to a HVAC anti-leakage valve. Background Art

[0002] The HVAC anti-leakage valve is a valve suitable for urban centralized heating systems or regional and decentralized heating systems. When the heating system leaks (or suddenly releases water), it can be automatically shut down and can only be opened after the heating system returns to normal. It fundamentally solves the problems of accidental leakage or artificial water release in the user-side heating system, maintains the property safety of heating companies and users, and achieves energy saving and consumption reduction;

[0003] Referring to a HVAC valve for HVAC engineering with patent number CN219954429U in the prior art; the HVAC anti-leakage valve is installed in the heating terminal box during actual use. Since the heating terminal box itself has an anti-theft function, it is unnecessary to add an additional insurance; and the HVAC valve has a complex structure, complex processing and assembly steps, and is inconvenient to replace and repair, and the clearing effect is poor each time;

[0004] In view of the above technical defects, a solution is now proposed. Utility Model Content

[0005] The utility model aims to provide a HVAC anti-leakage valve to solve the problems of complex HVAC valve structure, complicated processing and assembly steps, inconvenient replacement and maintenance, and poor clearing effect each time.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a HVAC anti-leakage valve, comprising a guide shaft arranged inside a valve body, a bottom cover is threadedly installed on the bottom of the valve body, a valve cover is threadedly installed on the top of the valve body, a guide valve core is fixedly installed on the inner bottom of the valve body corresponding to the valve cover, a regulating valve core is movably installed on the inner top of the valve cover, a floating valve core is sleeved on the outer side of the guide shaft near the inner bottom of the guide valve core, and a rectifying column plugged into the regulating valve core is sleeved on the top of the guide shaft; a locking bolt is installed on the top of the rectifying column, and the locking bolt is threadedly connected to the inner ring side of the valve cover.

[0007] Preferably, a mounting ring groove is provided on the inner side of the bottom of the regulating valve core corresponding to the valve body, a pressure ring plate is installed on the outer ring side of the mounting ring groove of the regulating valve core, and a return spring abutting against the mounting ring groove is installed at the bottom of the pressure ring plate.

[0008] Preferably, a plurality of sealing gasket grooves are arranged at intervals on the outer side of the bottom of the locking bolt, an external threaded ring is installed on the locking bolt through the sealing gasket groove above, an internal threaded portion corresponding to the external threaded ring is arranged on the inner ring side of the valve cover, and a plurality of tightly connected triangular grooves are arranged on the outside of the upper end of the locking bolt.

[0009] Preferably, a drain plug in contact with the bottom of the guide valve core is installed through a thread in the middle of the bottom cover, and a hexagonal hole is provided in the middle of the lower surface of the drain plug.

[0010] Preferably, the floating valve core is conical in shape and has a top diameter greater than a bottom diameter, and the top diameter of the floating valve core is greater than an inner diameter of a bottom opening of the regulating valve core.

[0011] Preferably, the valve body and the bottom cover, the valve body and the valve cover, and the guide valve core and the valve body are all threadedly connected via sealing gaskets.

[0012] Beneficial effects of the utility model:

[0013] (1) The utility model aims to solve the problems of complex HVAC valve structure, complicated processing and assembly steps, inconvenient replacement and maintenance, and poor clearing effect each time; by changing the relative position between the regulating valve core and the floating valve core, the shut-off flow can be adjusted quickly, and the fully automatic anti-leakage function of the heating system can be realized in a compact structure with a reduced number of structures. The mutual use of the two provides convenient operation after the heating system is applied with the anti-leakage valve, simplifies the processing and assembly steps, and improves the maintenance and clearing efficiency;

[0014] (2) The locking bolt is turned with a special key, and the locking bolt generates a vertical displacement through the external threaded ring and the valve cover, and drives the rectifying column to move vertically. At this time, the rectifying column drives the regulating valve core to move vertically, that is, the regulating valve core moves down to the inner cavity of the valve body, thereby adjusting the vertical distance between the bottom of the regulating valve core and the floating valve core. Therefore, when unexpected water loss or artificial water discharge occurs, the fluid in the heating system drives the floating valve core to rise to a different distance, thereby achieving the regulation of the shut-off flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings;

[0016] Figure 1 It is a structural stereogram of the entire utility model;

[0017] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0018] Figure 3 It is a partial structural cutaway schematic diagram of the utility model;

[0019] Figure 4 The utility model Figure 2 A is an enlarged schematic diagram;

[0020] Figure 5 The utility model Figure 2 The enlarged schematic diagram of point B in FIG.

[0021] Legend: 1. Valve body; 2. Bottom cover; 3. Valve cover; 4. Adjusting valve core; 5. Rectifying column; 6. Guide shaft; 7. Guide valve core; 8. Floating valve core; 9. Drain plug; 10. Locking bolt; 11. External thread ring; 12. Sealing gasket groove; 13. Pressure ring plate; 14. Reset spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment 1: This embodiment is used to solve the problems of complex HVAC valve structure, complicated processing and assembly steps, inconvenient replacement and maintenance, and poor clearing effect each time.

[0024] See also Figure 1 - Figure 5 As shown, this embodiment is a HVAC anti-leakage valve, including a guide shaft 6 arranged inside a valve body 1, a bottom cover 2 is threadedly installed on the bottom of the valve body 1, a valve cover 3 is threadedly installed on the top of the valve body 1, a guide valve core 7 is fixedly installed on the inner bottom of the valve body 1 corresponding to the valve cover 3, a regulating valve core 4 is movably installed on the inner top of the valve cover 3, a floating valve core 8 is sleeved on the outer side of the guide shaft 6 near the inner bottom of the guide valve core 7, and a rectifying column 5 plugged with the regulating valve core 4 is sleeved on the top of the guide shaft 6; a locking bolt 10 is installed on the top of the rectifying column 5, and the locking bolt 10 is threadedly connected to the inner ring side of the valve cover 3;

[0025] The middle part of the bottom cover 2 is threadedly penetrated with a drain plug 9 in contact with the bottom of the guide valve core 7. A hexagonal hole is provided in the middle of the lower surface of the drain plug 9. The floating valve core 8 is conical and has a top diameter greater than the bottom diameter. The top diameter of the floating valve core 8 is greater than the inner diameter of the bottom opening of the regulating valve core 4. The valve body 1 and the bottom cover 2, the valve body 1 and the valve cover 3, and the guide valve core 7 and the valve body 1 are all threadedly connected through sealing gaskets.

[0026] See also Figure 1 - Figure 3As shown, the main structure of the HVAC anti-leakage valve of the utility model is composed of a valve body 1, a regulating valve core 4, a guide valve core 7, a floating valve core 8 and a drain plug 9. The anti-leakage function is achieved by changing the position of the floating valve core 8 under the impact of the fluid; in the actual application process, when the heating system is operating normally and the set flow rate is greater than the actual flow rate, the fluid will flow freely; when the heating system loses water due to accidental water loss or artificial water discharge, the flow rate in the valve body 1 increases sharply, thereby driving the floating valve core 8 to rise along the guide shaft 6 to the bottom of the regulating valve core 4 to form a plug, thereby achieving the purpose of automatic locking;

[0027] Due to its compact structure and few components, it can also achieve the same anti-leakage function. When performing regular blockage clearing, simply unscrew the drain plug 9 to complete the cleaning of the internal collection. The operation is simple and convenient. The check valve arranged in the return water section can be closed synchronously when the valve cuts off the water flow, so that the entire heating system is in an automatically closed state.

[0028] Embodiment 2: This embodiment is used to solve the problem of complicated operation of the anti-leakage valve when performing flow regulation.

[0029] See also Figure 3 - Figure 5 As shown, a HVAC anti-leakage valve of this embodiment includes a valve body 1 having an installation ring groove 15 formed on the inner side of the bottom of a regulating valve core 4, a pressure ring plate 13 is installed on the outer ring side of the regulating valve core 4 corresponding to the installation ring groove 15, a return spring 14 abutting against the installation ring groove 15 is installed on the bottom of the pressure ring plate 13, a plurality of sealing gasket grooves 12 distributed at intervals are formed on the outer side of the bottom of the locking bolt 10, an external threaded ring 11 is installed on the locking bolt 10 through the upper sealing gasket groove 12, an internal threaded portion corresponding to the external threaded ring 11 is formed on the inner ring side of the valve cover 3, and a plurality of tightly connected triangular grooves are formed on the outer side of the upper end of the locking bolt 10;

[0030] See also Figure 3 - Figure 5 As shown, when the shut-off flow of the anti-leakage valve is adjusted, the locking bolt 10 is twisted by a special key, and the locking bolt 10 generates a vertical displacement with the valve cover 3 through the external threaded ring 11, and drives the rectifying column 5 to move vertically. At this time, the rectifying column 5 drives the regulating valve core 4 to move vertically, that is, the regulating valve core 4 is probed into the inner cavity of the valve body 1, so that the vertical distance between the bottom of the regulating valve core 4 and the floating valve core 8 is adjusted, so that when an accidental water loss or artificial water release occurs, the fluid in the heating system drives the floating valve core 8 to rise. The distance changes, thereby achieving the shut-off flow adjustment;

[0031] When the locking bolt 10 moves upward, the reset springs 14 on both sides of the bottom of the regulating valve core 4 will drive the regulating valve core 4 and the rectifying column 5 to reset together, thereby returning to the initial position; In summary, the shut-off flow adjustment sequence of the anti-leakage valve is simple and the composition structure is simple. No additional tools are required and a special key for the anti-leakage valve can be used to achieve rapid adjustment, thereby reducing the workload of the staff;

[0032] The process and principle of this utility model:

[0033] Step 1: When the heating system is operating normally, the set flow rate is greater than the actual flow rate, indicating that the fluid is running freely and unimpeded; when the heating system loses water due to accidental or artificial water discharge, the flow rate in the valve body 1 increases sharply, thereby driving the floating valve core 8 to rise along the guide shaft 6 to the bottom of the regulating valve core 4 to form a blockage, thereby achieving the purpose of automatic locking;

[0034] Step 2: When clearing the blockage: directly unscrew the drain plug 9 to complete the cleaning of the internal collection. The operation is simple and convenient. At the same time, the check valve set in the return water section can be closed synchronously when the valve cuts off the water flow, so that the entire heating system is in an automatic closed state;

[0035] Step 3: Use a special key to turn the locking bolt 10, and the locking bolt 10 generates vertical displacement with the valve cover 3 through the external threaded ring 11, and drives the rectifying column 5 to move vertically. At this time, the rectifying column 5 drives the regulating valve core 4 to move vertically, that is, the regulating valve core 4 goes down to the inner cavity of the valve body 1, so as to adjust the vertical distance between the bottom of the regulating valve core 4 and the floating valve core 8. Therefore, when there is an unexpected water loss or artificial water discharge, the fluid in the heating system drives the floating valve core 8 to rise to change the distance, thereby achieving the regulation of shut-off flow;

[0036] Combining Example 1 and Example 2, it is possible to quickly adjust the shut-off flow by changing the relative position between the regulating valve core 4 and the floating valve core 8, and to realize the fully automatic anti-leakage function of the heating system in a compact structure with a reduced number of structures. The mutual use of the two provides convenience in operation after the anti-leakage valve is applied to the heating system, simplifies the processing and assembly steps, and improves the efficiency of maintenance and unblocking.

[0037] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A HVAC anti-leakage valve, comprising a guide shaft (6) arranged inside a valve body (1), characterized in that: The bottom of the valve body (1) is threadedly mounted with a bottom cover (2), the top of the valve body (1) is threadedly mounted with a valve cover (3), the inner bottom of the valve body (1) corresponding to the valve cover (3) is fixedly mounted with a guide valve core (7), the inner top of the valve cover (3) is movably mounted with a regulating valve core (4), the outer side of the guide shaft (6) close to the inner bottom of the guide valve core (7) is sleeved with a floating valve core (8), the top of the guide shaft (6) is sleeved with a rectifying column (5) plugged into the regulating valve core (4); the top of the rectifying column (5) is mounted with a locking bolt (10), and the locking bolt (10) is threadedly connected to the inner ring side of the valve cover (3).

2. A HVAC anti-leakage valve according to claim 1, characterized in that: The valve body (1) is provided with a mounting ring groove (15) on the inner side of the bottom of the regulating valve core (4), and a pressure ring plate (13) is installed on the outer ring side of the mounting ring groove (15) of the regulating valve core (4). A return spring (14) abutting against the mounting ring groove (15) is installed at the bottom of the pressure ring plate (13).

3. A HVAC anti-leakage valve according to claim 1, characterized in that: The outer side of the bottom of the locking bolt (10) is provided with a plurality of sealing gasket grooves (12) distributed at intervals, the locking bolt (10) is installed with an external thread ring (11) through the upper sealing gasket groove (12), the inner ring side of the valve cover (3) is provided with an internal thread portion corresponding to the external thread ring (11), and the outer side of the upper end of the locking bolt (10) is provided with a plurality of tightly connected triangular grooves.

4. A HVAC anti-leakage valve according to claim 1, characterized in that: A drain plug (9) in contact with the bottom of the guide valve core (7) is installed through a thread in the middle of the bottom cover (2), and a hexagonal hole is provided in the middle of the lower surface of the drain plug (9).

5. The HVAC anti-leakage valve according to claim 1, characterized in that: The floating valve core (8) is cone-shaped and has a top diameter greater than a bottom diameter. The top diameter of the floating valve core (8) is greater than the inner diameter of the bottom opening of the regulating valve core (4).

6. A HVAC anti-leakage valve according to claim 1, characterized in that: The valve body (1) and the bottom cover (2), the valve body (1) and the valve cover (3), and the guide valve core (7) and the valve body (1) are all threadedly connected via sealing gaskets.

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