CN218971934U

CN218971934U - Gas proportional valve with pressure taking nozzle and gas appliance

Info

Publication number: CN218971934U
Application number: CN202223053927.0U
Authority: CN
Inventors: 陈永钊
Original assignee: Guangzhou Devotion Home Environment Technology Co ltd
Current assignee: Guangzhou Devotion Home Environment Technology Co ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-05-05
Anticipated expiration: 2032-11-17

Abstract

The utility model discloses a fuel gas proportional valve with a pressure taking nozzle and a fuel gas appliance, wherein the fuel gas proportional valve comprises a proportional valve body, a sealing ring and a sealing bolt, the proportional valve body is provided with the pressure taking nozzle, the pressure taking nozzle is internally provided with a sealing groove and an internal thread, the sealing ring is accommodated in the sealing ring, the sealing bolt is used for penetrating the sealing ring and is in threaded connection with the internal thread, and the heads of the sealing bolt are respectively abutted with the top surface of the sealing ring and the top end surface of the pressure taking nozzle. Above-mentioned gas proportional valve makes the sealing washer holding in the seal groove of getting the pressure mouth through the improvement to getting the pressure mouth, can avoid leading to the sealing washer to damage because of the operation is improper, compresses tightly the sealing washer in rethread sealing bolt and the internal thread threaded connection to guarantee its leakproofness, sealing bolt interior terminal surface forms spacingly with getting pressure mouth top terminal surface, can guarantee at reasonable sealing washer compression volume, thereby can effectively prevent the potential safety hazard that causes gas proportional valve to appear leaking gas when the screw of pressure mouth is got in the dismouting.

Description

Gas proportional valve with pressure taking nozzle and gas appliance

Technical Field

The utility model relates to the technical field of fuel gas proportional valves, in particular to a fuel gas proportional valve with a pressure taking nozzle and a fuel gas appliance.

Background

The fuel gas proportional valve is one of the core components of a constant temperature fuel gas water heater or a fuel gas wall hanging stove and the like, and has the main functions of stabilizing the output pressure of the fuel gas proportional valve and regulating the output pressure of the fuel gas proportional valve according to the input current so as to realize the control of the output pressure and the flow of the fuel gas, thereby controlling the output of the fire power of the stove and realizing the constant temperature output of the hot water.

Under normal conditions, the application range of the front pressure of the natural gas valve of the gas water heater or the gas wall-mounted boiler is 1000 Pa-3300 Pa, and if the gas pressure is too high or too low, the normal use of gas products can be influenced. In order to ensure that the product runs normally, under normal conditions, when the gas water heater or the gas hanging stove is installed, debugged or overhauled, whether the valve front pressure of the gas is in a normal working range or not can be detected, and therefore a valve front pressure taking port can be arranged at the air inlet end of the gas proportional valve. Similarly, in order to detect whether the change of the output gas pressure of the gas proportional valve is normal, the back pressure of the valve is set at the gas outlet end of the gas proportional valve to take pressure.

In the conventional technology, a pressure taking port of a fuel gas proportional valve is generally a hollow concentric cylinder, and an inner hole is a fuel gas channel for detecting fuel gas pressure. Meanwhile, the inner circle at the top of the cylinder is provided with internal threads. The sealing mode is as follows: and a gasket is arranged between the screw and the pressure taking port, and is compressed after the screw is screwed, and an end face sealing mode is adopted. But it has the following disadvantages: 1. when the gasket is tightly pressed after the screw is screwed, if the force distance for screwing the screw is too large, the gasket is extremely easy to crush, so that the sealing part leaks air, and safety accidents are caused. The conventional general solution is that the screw is installed by using a tool with torque adjustment during factory production, but when a user detects the screw, and the screw with the torque adjustment is required to be disassembled and assembled, a detection person or a maintenance person cannot use the tool with the torque adjustment, and often operates by experience, so that the potential safety hazard of uncertain air leakage is brought. Or a gasket with higher hardness is used, but when the gasket is screwed down, a large force cabinet is needed, so that when the gasket is disassembled and assembled again, the compression seal cannot be ensured. 2. When the gasket compresses tightly at long-term screw, can't guarantee when moment unanimous output because of the dismouting is screwed up, the unreasonable condition can appear in the compression volume of gasket, causes the resilience of gasket to become poor, life greatly reduced, causes the hidden danger of gas leakage.

Disclosure of Invention

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a gas proportional valve with a pressure taking nozzle, which solves the conventional problems, and can effectively prevent the potential safety hazard of gas leakage of the gas proportional valve caused by damage of a gasket due to improper operation when a screw of the pressure taking nozzle is disassembled and assembled.

The second purpose of the utility model is to provide a gas appliance such as a gas water heater, a gas wall-mounted stove and the like which adopts the gas proportional valve with the pressure taking nozzle.

One of the purposes of the utility model is realized by adopting the following technical scheme:

the utility model provides a take gas proportional valve of pressure mouth, includes the proportional valve body, installs sealing washer and sealing bolt on the proportional valve body, the proportional valve body is equipped with gets the pressure mouth, it is equipped with seal groove and internal thread in the pressure mouth to get, the sealing washer holding in the sealing washer, sealing bolt is used for wearing to locate the sealing washer with internal thread threaded connection, just sealing bolt's head all with the top surface of sealing washer, the top terminal surface butt of getting the pressure mouth.

Preferably, the sealing groove is arranged in an increasing manner from inside to outside.

Preferably, the sealing groove has an inverted trapezoid structure on a longitudinal section.

Preferably, the seal groove is in a conical structure.

Preferably, the sealing ring is an O-ring.

Preferably, the sealing compression amount of the O-shaped sealing ring is 20% -35%.

Preferably, the sealing compression amount of the O-shaped sealing ring is 20% -30%.

Preferably, the pressure taking port is arranged at the front air inlet end and/or the rear air outlet end of the proportional valve body.

Preferably, the sealing bolt is a hexagon bolt, and the top surface of the head of the hexagon bolt is provided with a cross groove or a straight groove.

The second purpose of the utility model is realized by adopting the following technical scheme:

the gas appliance comprises the gas proportional valve with the pressure taking nozzle.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the gas proportional valve with the pressure taking mouth, through improvement of the pressure taking mouth, the sealing ring is accommodated in the sealing groove of the pressure taking mouth, so that the sealing ring is prevented from being damaged due to improper operation, the sealing ring is tightly pressed while the sealing bolt is in threaded connection with the internal thread, so that the tightness of the sealing ring is ensured, the limit is formed between the inner end face of the sealing bolt and the top end face of the pressure taking mouth, the compression amount of the sealing ring is ensured, and the potential safety hazard of gas leakage of the gas proportional valve caused by dismounting the screw of the pressure taking mouth can be effectively prevented.

2. According to the fuel gas proportional valve with the pressure taking mouth, the sealing groove of the pressure taking mouth is arranged to be of a conical structure, and meanwhile, the O-shaped sealing ring with proper sealing compression amount is selected, so that the service life of the sealing ring can be prolonged under the optimal sealing ring compression amount, and the sealing effect of the pressure taking mouth is further improved.

Drawings

FIG. 1 is a schematic diagram of a fuel gas proportional valve with a pressure tap according to a preferred embodiment of the utility model;

FIG. 2 is a partially exploded view of the fuel gas proportioning valve of FIG. 1;

FIG. 3 is a partial cross-sectional view of the unscrewed state at A shown in FIG. 2;

fig. 4 is a partial cross-sectional view of the sealed state at a shown in fig. 2.

In the figure: 10. a proportional valve body; 11. a pressure taking port; 110. sealing grooves; 111. an internal thread; 20. a seal ring; 30. a sealing bolt; 31. cross grooves.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the description of the present utility model, it will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.

Referring to fig. 1-4, a fuel gas proportional valve with a pressure tap according to a preferred embodiment of the present utility model is used for installing on a fuel gas boiler, a wall-mounted fuel gas boiler, etc., and detecting whether the pressure before/after the fuel gas valve is within a normal working range during installation, debugging or maintenance. Specifically, the fuel gas proportional valve comprises a proportional valve body 10, a sealing ring 20 and a sealing bolt 30, wherein the sealing ring 20 and the sealing bolt 30 are installed on the proportional valve body 10, the proportional valve body 10 is provided with a pressure taking port 11 communicated with the inside of the proportional valve body 10, a sealing groove 110 and an internal thread 111 are arranged in the pressure taking port 11, the sealing ring 20 is accommodated in the sealing ring 20, the sealing bolt 30 is used for penetrating through the sealing ring 20 and is in threaded connection with the internal thread 111, and the head of the sealing bolt 30 is abutted against the top surface of the sealing ring 20 and the top end surface of the pressure taking port 11.

Above-mentioned gas proportional valve makes sealing washer 20 holding in get in the seal groove 110 of pressure port 11 through the improvement to pressure port 11, can avoid leading to sealing washer 20 damage because of the operation is improper, compress tightly sealing washer 20 when rethread sealing bolt 30 and internal thread 111 threaded connection to guarantee its leakproofness, sealing bolt 30 interior terminal surface forms spacingly with pressure port 11 top terminal surface, can guarantee the compression volume at reasonable sealing washer 20, thereby can effectively prevent to cause gas proportional valve to appear the potential safety hazard of gas leakage when the screw of pressure port 11 is got in the dismouting.

The seal groove 110 may have a circular shape, a square shape, an oval shape, a funnel shape, etc. and is configured with the seal ring 20, in one embodiment, the seal groove 110 is enlarged from inside to outside, so as to ensure that the seal ring 20 has a reasonable compression space in the seal groove 110. In this embodiment, the seal groove 110 has a tapered structure, and a lower portion thereof is provided to communicate with the female screw 111. In a longitudinal section, the seal groove 110 has an inverted trapezoid structure.

The sealing ring 20 is an elastic and resilient sealing material and is used for sealing between devices, the sealing ring 20 is in a U-shaped, O-shaped, rectangular, Y-shaped and other structures and is matched with the sealing groove 110 in structural arrangement, in the embodiment, the sealing ring 20 is an O-shaped sealing ring 20 and is matched with the sealing groove 110 in a conical structure or an inverted trapezoid structure, when the sealing bolt 30 is screwed into the internal thread 111 of the pressure taking port 11 of the fuel gas proportional valve, the inner end surface of the bolt and the top end surface of the pressure taking port 11 form a limit, and the O-shaped sealing ring 20 and the sealing groove 110 at the top of the pressure taking port 11 form an axial sealing state, so that the O-shaped sealing ring 20 is in a reasonable sealing compression amount, and the good sealing effect and the service life of the O-shaped sealing ring 20 are ensured. In one embodiment, the O-ring 20 has a seal compression of 20% -35%. Preferably, the sealing compression of the O-ring 20 is 20% -30%. When the pressure taking port 11 is produced or disassembled to seal the bolt 30 structure, a special tool with moment is not needed, and the tightness of the pressure taking port can be ensured.

In this embodiment, as shown in fig. 1, the pressure sampling port 11 is provided at the front end of the air intake and/or the rear end of the air outlet of the proportional valve body 10, so as to detect whether the pressure of the fuel gas before the valve is within the normal working range during installation, debugging or maintenance.

As shown in fig. 1 and 4, the sealing bolt 30 is a hexagonal bolt, the top surface of the head of the hexagonal bolt is provided with a cross groove 31 or a straight groove, in this embodiment, the top surface of the head of the hexagonal bolt is the cross groove 31, so that a worker can conveniently unscrew the bolt through various tools such as a screwdriver or a wrench.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The utility model provides a take gas proportional valve of pressure mouth, its characterized in that, is in including proportional valve body, installing sealing washer and sealing bolt on the proportional valve body, the proportional valve body is equipped with the pressure mouth of getting, be equipped with seal groove and internal thread in the pressure mouth of getting, the sealing washer holding in the sealing washer, sealing bolt is used for wearing to locate the sealing washer with internal thread threaded connection, just sealing bolt's head all with the top surface of sealing washer, the top terminal surface butt of pressure mouth of getting.

2. The gas proportional valve with the pressure tap of claim 1, wherein the sealing groove is arranged in an enlarged manner from inside to outside.

3. The gas proportional valve with pressure tap of claim 2, wherein the seal groove has an inverted trapezoid structure in a longitudinal section.

4. The gas proportional valve with pressure tap of claim 2, wherein the seal groove is of a conical structure.

5. The gas proportional valve with pressure tap of claim 1, wherein the seal ring is an O-ring seal.

6. The gas proportional valve with pressure tap of claim 5, wherein the sealing compression of the O-ring is 20% -35%.

7. The gas proportional valve with pressure tap of claim 6, wherein the sealing compression of the O-ring is 20% -30%.

8. The fuel gas proportional valve with the pressure taking nozzle according to claim 1, wherein the pressure taking port is arranged at the front air inlet end and/or the rear air outlet end of the proportional valve body.

9. The gas proportional valve with the pressure taking nozzle as in claim 1, wherein the sealing bolt is a hexagonal bolt, and a cross groove or a straight groove is formed in the top surface of the head of the hexagonal bolt.

10. A gas appliance comprising a gas proportioning valve with a pressure tap as claimed in any one of claims 1 to 9.