Gas-fired boiler exhaust valve

Abstract

The utility model belongs to the technical field of gas-fired boilers, and particularly relates to a gas-fired boiler exhaust valve which comprises a valve body and an end cover, the end cover is fixedly connected with the upper end of the valve body, an installation ring is fixedly connected to the outer side of the lower end of the valve body, a connector is fixedly connected to the lower end of the valve body, and an exhaust pipe is fixedly connected to the lower portion of the left end in the valve body. The inner end and the outer end of the valve body are connected with exhaust mechanisms, each exhaust mechanism comprises a sealing plug slidably connected to the inner side of the valve body, and a pull rod is fixedly connected to the middle of the upper side of each sealing plug. According to the exhaust valve of the gas-fired boiler, when the interior of the gas-fired boiler needs to be exhausted, the pull rod moves upwards to drive the sealing plug to move upwards to leave the gas inlet in the lower end of the interior of the valve body by pulling the handle upwards, and at the moment, high-pressure gas in the gas-fired boiler enters the valve body from the lower end of the valve body and then is exhausted from the left end of the exhaust pipe; the high-pressure gas can jack up the sealing plug upwards, and then the gas enters the valve body and then is exhausted.

Description

Technical Field

[0001] The utility model relates to the technical field of gas boilers, in particular to an exhaust valve for a gas boiler. Background Art

[0002] A gas boiler is an energy conversion device. The energy input to the boiler includes chemical energy and electrical energy in the fuel. The gas boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. The quick exhaust valve is a device used to quickly adjust the air pressure in the control valve body such as the proportional control valve. Its main function is to quickly release the airflow in the proportional control valve according to the preset threshold when the pressure in the proportional control valve suddenly changes.

[0003] The existing quick exhaust valve has a relatively complex internal structure and is prone to malfunction after long-term use, making it less practical.

[0004] For example, the boiler quick exhaust valve disclosed in Chinese patent CN221504080U has a simple drain valve structure by being provided with a handle, a pull rod, a return spring and a piston. It is easy to open and not easy to be damaged. Therefore, when in use, when the valve is to be opened, the staff can pull the handle, and the handle causes the pull rod to move, and the pull rod will cause the piston to move, and the piston will separate from the hole inside the valve body, and then the valve will open. It is easy and fast to open, has a simple structure, and is not easy to be damaged. This valve can also open automatically. When the pressure in the boiler is too high, the pressure can cause the piston to move, and the piston compresses the return spring, and the valve can open automatically. By rotating the adjusting bolt, the adjusting bolt can contact the outside of the piston. By changing the force between the adjusting bolt and the piston, the force of the automatic opening of the valve can be adjusted.

[0005] However, this valve adjusts the force of automatic opening of the valve by adjusting the bolt contacting the valve, so that when the valve opens automatically, the piston will slide on the outer end of the adjusting bolt, causing friction, which will cause wear on the outer end of the piston. After long-term wear, it will affect the sealing of the valve.

[0006] For this reason, we urgently need to provide a gas boiler exhaust valve that can not wear out the piston. Utility Model Content

[0007] The purpose of the utility model is to provide a gas boiler exhaust valve to solve the problem proposed in the above background technology that when the valve is automatically opened, the piston slides on the outer end of the adjusting bolt, causing friction, thereby causing wear on the outer end of the piston, and affecting the sealing of the valve after long-term wear.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas boiler exhaust valve, comprising a valve body and an end cover, the end cover being fixedly connected to the upper end of the valve body, the outer side of the lower end of the valve body being fixedly connected to a mounting ring, the lower end of the valve body being fixedly connected to an interface, the lower left end of the inner part of the valve body being fixedly connected to an exhaust pipe, and the inner and outer ends of the valve body being connected to an exhaust mechanism.

[0009] The exhaust mechanism includes a sealing plug slidably connected to the inner side of the valve body, a pull rod is fixedly connected to the upper middle position of the sealing plug, a handle is welded to the upper end of the pull rod, a circular plate is slidably connected to the inner upper end of the valve body, an adjusting block is fixedly connected to the right end of the circular plate, the outer right end of the valve body is fixedly connected to a base plate, a bearing is fixedly connected to the inside of the upper end of the base plate, a threaded rod is fixedly connected to the inner side of the bearing, a rotating handle is welded to the upper end of the threaded rod, and a spring is fixedly connected to the lower side of the circular plate.

[0010] A further improvement is that a vertical slide groove is opened at the right end of the valve body, and the front and rear sides of the left end of the adjusting block are slidingly connected to the inner side of the slide groove, so that when the circular plate moves along the inner side of the valve body, the adjusting block will slide along the inner side of the slide groove, thereby limiting the moving trajectory of the circular plate and the adjusting block.

[0011] A further improvement is that a threaded hole is opened in the middle position inside the adjustment block, and the outer side of the threaded rod is threadedly connected to the inner side of the threaded hole, so that when the rotating handle is turned to rotate the threaded rod, the adjustment block at the outer end will be driven to move along the outer side of the threaded rod.

[0012] A further improvement is that the lower end of the spring is fixedly connected to the upper side of the sealing plug, and the lower end of the sealing plug abuts against the air inlet at the lower inner end of the valve body, so that under the action of the spring, the sealing plug will be squeezed and pushed downward.

[0013] A further improvement is that a connecting ring is connected to the outer left end of the exhaust pipe, and a HEPA filter is fixedly connected to the left side of the connecting ring, so that when the connecting ring is connected to the outer left end of the exhaust pipe, the HEPA filter will be located at the left end of the exhaust pipe.

[0014] A further improvement is that an internal thread is provided on the inner side of the connecting ring, and an external thread is provided on the outer side of the left end of the exhaust pipe. The outer side of the left end of the exhaust pipe is connected to the inner thread of the connecting ring, so that the connecting ring on the outer side of the left end of the exhaust pipe can be disassembled and assembled by rotating the connecting ring located on the outer side of the left end of the exhaust pipe.

[0015] A further improvement is that an annular rubber pad is adhered to the lower side of the mounting ring, and mounting holes for passing fixing bolts are provided inside the mounting ring and the annular rubber pad, so that when the valve body is installed to the outer end of the gas boiler, the annular rubber pad on the lower side of the mounting ring will contact the installation position of the gas boiler.

[0016] In summary, the present application discloses a gas boiler exhaust valve.

[0017] According to the present technical solution, when it is necessary to adjust the automatic opening force of the exhaust valve, the adjusting block is moved by rotating the rotary handle to drive the circular plate to move, thereby compressing or relaxing the spring at the lower end, thereby adjusting the pressure of the spring on the lower end spring, so that the pressure required to lift the sealing plug is changed. Therefore, this adjustment method will not cause wear to the sealing plug, and will not cause damage to the use of the exhaust valve.

[0018] Furthermore, by connecting the connecting ring to the outer side of the left end of the exhaust pipe, when the HEPA filter is located at the left end of the exhaust pipe, the gas discharged from the left end of the exhaust pipe will be filtered by the HEPA filter, which can prevent the flue gas in the gas boiler from being directly discharged from the exhaust pipe and harming the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a top view of the main structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the valve body of the present utility model;

[0021] Figure 3 This is a bottom view of the main structure of the utility model;

[0022] Figure 4 This is a structural diagram of the threaded rod of the utility model;

[0023] Figure 5 This is a structural diagram of the connecting ring of the utility model.

[0024] In the figure: 1. Valve body; 2. End cover; 3. Mounting ring; 4. Interface; 5. Exhaust pipe; 601. Piston; 602. Pull rod; 603. Handle; 604. Round plate; 605. Adjustment block; 606. Bottom plate; 607. Bearing; 608. Threaded rod; 609. Rotating handle; 610. Spring; 701. Connecting ring; 702. HEPA filter; 8. Ring-shaped rubber pad. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 5The utility model provides a technical solution: a gas boiler exhaust valve, comprising a valve body 1 and an end cover 2, the end cover 2 is fixedly connected to the upper end of the valve body 1, the outer side of the lower end of the valve body 1 is fixedly connected to a mounting ring 3, the lower end of the valve body 1 is fixedly connected to an interface 4, the lower left end of the interior of the valve body 1 is fixedly connected to an exhaust pipe 5, and the inner and outer ends of the valve body 1 are connected to an exhaust mechanism.

[0027] The exhaust mechanism includes a sealing plug 601 slidably connected to the inner side of the valve body 1, a pull rod 602 is fixedly connected to the upper middle position of the sealing plug 601, a handle 603 is welded to the upper end of the pull rod 602, a circular plate 604 is slidably connected to the inner upper end of the valve body 1, an adjusting block 605 is fixedly connected to the right end of the circular plate 604, a vertical slide groove is provided at the right end of the valve body 1, and the front and rear sides of the left end of the adjusting block 605 are slidably connected to the inner side of the slide groove, so that when the circular plate 604 moves along the inner side of the valve body 1, the adjusting block 605 will slide along the inner side of the slide groove, thereby limiting the moving trajectory of the circular plate 604 and the adjusting block 605, so that the circular plate 604 and the adjusting block 605 as a whole can only be translated in the vertical direction.

[0028] The right end of the outer side of the valve body 1 is fixedly connected to a base plate 606, and a bearing 607 is fixedly connected to the inner side of the upper end of the base plate 606. A threaded rod 608 is fixedly connected to the inner side of the bearing 607. A rotating handle 609 is welded to the upper end of the threaded rod 608. A threaded hole is provided in the middle position inside the adjusting block 605. The outer side of the threaded rod 608 is threadedly connected to the inner side of the threaded hole. When the rotating handle 609 is rotated to rotate the threaded rod 608, the adjusting block 605 at the outer end will be driven to move along the outer side of the threaded rod 608, and the circular plate 604 will be driven to slide along the inner side of the valve body 1.

[0029] A spring 610 is fixedly connected to the lower side of the circular plate 604, and the lower end of the spring 610 is fixedly connected to the upper side of the sealing plug 601. The lower end of the sealing plug 601 abuts against the air inlet at the lower end of the inner side of the valve body 1. Therefore, under the action of the spring 610, the sealing plug 601 will be squeezed and pushed downward, pressing the sealing plug 601 to the air inlet at the lower end of the valve body 1, thereby closing the valve body 1.

[0030] A connecting ring 701 is connected to the left end of the outer side of the exhaust pipe 5, and a HEPA filter 702 is fixedly connected to the left side of the connecting ring 701. When the connecting ring 701 is connected to the outer side of the left end of the exhaust pipe 5, the HEPA filter 702 will be located at the left end of the exhaust pipe 5, so that the gas discharged from the left end of the exhaust pipe 5 will be filtered by the HEPA filter 702, preventing the flue gas in the gas boiler from being directly discharged from the exhaust pipe 5 and endangering the environment.

[0031] An internal thread is provided on the inner side of the connecting ring 701, and an external thread is provided on the outer side of the left end of the exhaust pipe 5. The outer side of the left end of the exhaust pipe 5 is connected to the inner thread of the connecting ring 701. Therefore, by rotating the connecting ring 701 on the outer side of the left end of the exhaust pipe 5, the connecting ring 701 on the left end of the exhaust pipe 5 can be disassembled and assembled, so that the HEPA filter 702 can be removed and replaced after long-term use.

[0032] An annular rubber pad 8 is adhered to the lower side of the mounting ring 3, and mounting holes for passing fixing bolts are provided inside the mounting ring 3 and the annular rubber pad 8. Therefore, when the valve body 1 is mounted to the outer end of the gas boiler, the annular rubber pad 8 on the lower side of the mounting ring 3 will contact the mounting position of the gas boiler, so that the mounting position remains sealed.

[0033] Working principle: When it is necessary to vent the inside of the gas boiler, pull up the handle 603, so that the pull rod 602 moves upward and drives the sealing plug 601 to move up and away from the air inlet at the lower end of the valve body 1. At this time, the high-pressure gas in the gas boiler will enter from the lower end of the valve body 1 and then be discharged from the left end of the exhaust pipe 5; when the gas pressure in the gas boiler is too high, the high-pressure gas will push the sealing plug 601 upward, and then the gas will enter the valve body 1 and be discharged.

[0034] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

Claims

1. A gas boiler exhaust valve, comprising a valve body (1) and an end cover (2), wherein the end cover (2) is fixedly connected to the upper end of the valve body (1), characterized in that: The outer side of the lower end of the valve body (1) is fixedly connected to a mounting ring (3), the lower end of the valve body (1) is fixedly connected to an interface (4), the lower left end of the interior of the valve body (1) is fixedly connected to an exhaust pipe (5), and the inner and outer ends of the valve body (1) are connected to an exhaust mechanism; The exhaust mechanism includes a sealing plug (601) slidably connected to the inner side of the valve body (1), a pull rod (602) is fixedly connected to the middle position of the upper side of the sealing plug (601), a handle (603) is welded to the upper end of the pull rod (602), a circular plate (604) is slidably connected to the upper end of the inner side of the valve body (1), an adjustment block (605) is fixedly connected to the right end of the circular plate (604), a bottom plate (606) is fixedly connected to the right end of the outer side of the valve body (1), a bearing (607) is fixedly connected to the inner side of the bottom plate (606), a threaded rod (608) is fixedly connected to the inner side of the bearing (607), a rotating handle (609) is welded to the upper end of the threaded rod (608), and a spring (610) is fixedly connected to the lower side of the circular plate (604).

2. A gas boiler exhaust valve according to claim 1, characterized in that: A vertical sliding groove is provided at the right end of the valve body (1), and the front and rear sides of the left end of the regulating block (605) are slidably connected to the inner side of the sliding groove.

3. The gas boiler exhaust valve according to claim 1, characterized in that: A threaded hole is provided in the middle of the adjusting block (605), and the outer side of the threaded rod (608) is threadedly connected to the inner side of the threaded hole.

4. A gas boiler exhaust valve according to claim 1, characterized in that: The lower end of the spring (610) is fixedly connected to the upper side of the sealing plug (601), and the lower end of the sealing plug (601) abuts against the air inlet at the lower inner end of the valve body (1).

5. The gas boiler exhaust valve according to claim 1, characterized in that: The outer left end of the exhaust pipe (5) is connected to a connecting ring (701), and the left side of the connecting ring (701) is fixedly connected to a HEPA filter (702).

6. A gas boiler exhaust valve according to claim 5, characterized in that: The inner side of the connecting ring (701) is provided with an internal thread, the outer side of the left end of the exhaust pipe (5) is provided with an external thread, and the outer side of the left end of the exhaust pipe (5) is connected to the inner side of the connecting ring (701) by thread.

7. The gas boiler exhaust valve according to claim 1, characterized in that: An annular rubber pad (8) is adhered to the lower side of the mounting ring (3), and mounting holes for passing fixing bolts are provided inside the mounting ring (3) and the annular rubber pad (8).

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