CN106931210B

CN106931210B - Fusible plug and pressure equipment

Info

Publication number: CN106931210B
Application number: CN201710282157.1A
Authority: CN
Inventors: 侯成芳; 李冰凝; 丁东青
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2017-04-26
Filing date: 2017-04-26
Publication date: 2023-02-28
Anticipated expiration: 2037-04-26
Also published as: CN106931210A

Abstract

The invention relates to the technical field of safety protection equipment, in particular to an fusible plug, which comprises: the valve body is detachably connected with the plug body; the valve body is used for being connected with a pipeline, and a first through channel is arranged on the valve body; the plug body is provided with a second through passage, and the first through passage can be communicated with the second through passage; the second channel is filled with sensitive material, and the sensitive material can change to enable the second channel to have an opening state. This fusible plug, through designing into the structure that includes valve body and cock body two parts with fusible plug, the connection can be dismantled to cock body and valve body, and sensitive material sets up in the cock body. During production, the valve body and the plug body are selectively connected or not connected temporarily, so that misoperation of the fusible plug in the transportation or storage process can be effectively avoided, the pipeline leakage phenomenon is prevented, and the after-sale repair probability of the product is greatly reduced. And even if the condition to be maintained appears, the plug body part can be directly replaced, and the maintenance efficiency is greatly improved.

Description

Fusible plug and pressure equipment

Technical Field

The invention relates to the technical field of safety protection equipment, in particular to an fusible plug and pressure equipment.

Background

Fusible plugs are a common temperature protection device, and are closed below a certain temperature. The fusible plug used in the air conditioning industry at present generally comprises a plug body and a fusible alloy, and the fusible alloy is melted at a certain temperature by utilizing the characteristic of low melting point of the fusible alloy filled in the plug hole to open the plug hole of the fusible plug, so that the circulation of a refrigerant is realized.

The fusible plug is welded to a pipeline part of a product in the production of the product, and is easy to malfunction in the process of subsequent product transportation or storage. Because the opening and closing of the fusible plug are determined by the melting point and the pressure resistance of the fusible alloy, the fusible plug is opened due to higher environmental temperature in the processes of storing and transporting products, pipelines are leaked, and the products cannot be normally delivered. In addition, the fusible plug is irreversible after misoperation, the product needs to be returned to the after-sale for maintenance due to pipeline leakage after being sold, the old fusible plug needs to be taken down and a new fusible plug needs to be welded again in the maintenance process, and the efficiency is low.

Disclosure of Invention

Therefore, the fusible plug and the pressure equipment comprising the fusible plug are needed to solve the problems that the traditional fusible plug is easy to malfunction, causes pipeline leakage, is inconvenient to maintain and the like.

The above purpose is realized by the following technical scheme:

a fusible plug comprising: the valve body is detachably connected with the plug body;

the valve body is used for being connected with a pipeline, and a first through channel is arranged on the valve body; the plug body is provided with a second through passage, and the first passage can be communicated with the second passage; the second channel is filled with sensitive material, and the sensitive material can change to enable the second channel to have an opening state.

In one embodiment, the valve body is threadably connected to the plug body.

In one embodiment, a sealing gasket is arranged between the valve body and the plug body, and an overflowing hole is arranged in the center of the sealing gasket.

In one embodiment, the fusible plug further comprises a sealing cap capable of being sleeved on one end of the valve body far away from the pipeline to seal the first channel.

In one embodiment, the valve body is further provided with an opening and closing mechanism for opening or closing the first passage.

In one embodiment, the switch mechanism comprises a valve core, a valve core channel is arranged on the valve body, and the valve core channel is communicated with the first channel; the spool is disposed within the spool passage and is translatable and/or rotatable relative to the spool passage to open or close the first passage.

In one embodiment, the spool passage is perpendicular to the first passage; one end of the valve core is provided with a via hole perpendicular to the valve core channel, and the valve core rotates relative to the valve core channel to realize the communication between the via hole and the first channel.

In one embodiment, the spool passage is perpendicular to the first passage; the valve core is in reciprocating translation relative to the valve core channel so that one end of the valve core retracts or extends relative to the hole wall of the first channel, and therefore the first channel is opened or closed.

In one embodiment, the valve core is threaded with the valve core passage.

In one embodiment, the first channel is divided into three sections, namely a first section channel, a second section channel and a third section channel, wherein the inner diameter of the first section channel and the inner diameter of the third section channel are both larger than that of the second section channel; the valve core channel is communicated with the second section channel.

A pressure device comprising a fusible plug as claimed in any preceding claim.

Above-mentioned fusible plug through designing fusible plug into the structure including valve body and cock body two parts, the connection can be dismantled to cock body and valve body, and the valve body is fixed with pipe connection, and sensitive material sets up in the cock body. Therefore, if the transportation or storage environment is easy to cause the change of sensitive materials, the valve body is fixedly connected to the pipeline during production of products, the plug body is transported or stored independently, and the plug body is connected to the valve body after the products are transported to the destination during sale, so that the fusible plug can be effectively prevented from generating misoperation in the transportation or storage process, the pipeline leakage phenomenon is prevented, and the after-sale repair probability of the products is greatly reduced. And even if the condition that needs maintenance appears, can directly pull down the cock body and change and need not to pull down the valve body from the pipeline, simple, quick improves maintenance efficiency greatly.

As the fusible plug has the technical effects, the pressure equipment comprising the fusible plug also has corresponding technical effects.

Drawings

FIG. 1 is an exploded view of the fusible plug according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a fusible plug provided in accordance with an embodiment of the present invention;

FIG. 3 is a schematic structural view of a valve body of the fusible plug provided in an embodiment of the present invention;

FIG. 4 is a schematic view of a plug body of the fusible plug according to an embodiment of the present invention;

FIG. 5 is a schematic view of a fusible plug according to an embodiment of the present invention in a first passage closed state;

FIG. 6 is a schematic view of a fusible plug according to an embodiment of the present invention in a state where a first passage is open;

fig. 7 is a schematic structural diagram of a valve element of the fusible plug according to an embodiment of the present invention.

Wherein:

100-a valve body;

110 — a first channel; 111-a first section of a channel; 112-a second section of channel; 113-a third section of channels;

120-a switch mechanism; 121-a valve core; 122-via holes;

130-a spool passage;

200-a plug body;

210-a second channel;

220-a sensitive material;

300-a sealing gasket;

310-an overflow hole;

400-sealing the cap.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the fusible plug and the pressure device of the present invention are further described in detail by the following embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. 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 on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

As shown in fig. 1 to 4, an embodiment of the fusible plug of the present invention includes: the valve body 100 and the plug body 200 are detachably connected;

the valve body 100 is used for connecting with a pipeline, and a first channel 110 which penetrates through the valve body 100 is arranged on the valve body 100; the plug body 200 is provided with a second channel 210 which penetrates through the plug body, and the first channel 110 can be communicated with the second channel 210; the second channel 210 is filled with a sensitive material 220, and the sensitive material 220 can be changed to enable the second channel 210 to have an open state.

The sensitive material 220 mainly refers to a fusible metal, a fusible alloy, etc., which can be melted according to a temperature change to change the second channel 210 from a closed state to an open state. The sensitive material 220 is arranged in the second channel 210, and the sensitive material 220 can be changed to enable the second channel 210 to have an open state; when the second passage 210 is in the open state, the second passage 210 and the first passage 110 communicate with each other.

The valve body 100 and the plug body 200 may be connected in various ways, for example, the valve body 100 is screwed with the plug body 200, and may be that an external thread is provided on an outer wall of one end of the valve body 100, and an internal thread hole matched with the external thread is provided on one end of the plug body 200. Of course, an internal threaded hole may be provided at one end of the valve body 100, and an external thread engaged with the internal thread may be provided on an outer wall of one end of the plug body 200. In other embodiments, the valve body 100 and the plug body 200 can be detachably connected by clamping. Specifically, a clamping groove is formed in the outer wall of one end of the valve body 100, a connecting hole is formed in one end of the plug body 200, a clamping protrusion is arranged on the hole wall of the connecting hole, and the clamping protrusion is clamped in the clamping groove to achieve connection of the clamping groove and the connecting hole. The clamping groove can be an annular clamping groove or an L-shaped clamping groove.

Further, a sealing gasket 300 is arranged between the valve body 100 and the plug body 200, an overflowing hole 310 is arranged at the center of the sealing gasket 300, and the sealing gasket 300 is used for sealing a gap between the valve body 100 and the plug body 200 after connection, so as to prevent a pipeline medium from leaking. By taking the outer wall of one end of the valve body 100 to be provided with an external thread, and the one end of the plug body 200 to be provided with an internal thread hole matched with the external thread as an example, the sealing washer 300 can be arranged in the internal thread hole of the plug body 200, after the valve body 100 and the plug body 200 are connected, one end of the sealing washer 300 is abutted on the plug body 200, the other end is abutted on the valve body 100, and the second channel 210 can be communicated with the first channel 110 through the through hole 310. For example, the inner diameter of the internally threaded hole is larger than the inner diameter of the second channel 210, the wall of the internally threaded hole and the inner wall of the second channel 210 form an annular end surface, an annular groove is formed on the internally threaded hole next to the annular end surface, and the sealing gasket 300 is installed in the annular groove. Of course, the sealing washer 300 may also be sleeved on the valve body 100 through the overflowing hole 310, and after the valve body 100 and the plug body 200 are connected, one end of the sealing washer 300 abuts on the plug body 200, and the other end abuts on the valve body 100.

The fusible plug of the embodiment of the present invention includes a valve body 100 and a plug body 200, which are detachably connected, the valve body 100 being used for connection with a pipeline, and a sensitive material 220 being disposed in the plug body 200. Therefore, the production and installation mode can be selected according to the transportation or storage environment, if the transportation or storage environment does not cause the change of the sensitive material 220 (the fusible alloy is melted), the valve body 100 and the pipeline are welded and fixed during the production of the product, and the plug body 200 can be transported or stored together with the valve body 100 after being connected. If the environment for transporting or storing the fusible plug is easy to cause the change of the sensitive material 220 (the fusible alloy is melted), the valve body 100 and the pipeline are welded and fixed during the production of the product, the plug body 200 can be transported or stored independently without being connected with the valve body 100, and when the product is sold, the plug body 200 is assembled on the valve body 100 after the product is transported to a destination, so that the fusible plug can be effectively prevented from generating misoperation in the transporting or storing process, the pipeline leakage phenomenon is prevented, and the possibility of after-sale repair of the product is greatly reduced. Moreover, even if the maintenance condition appears, the plug body 200 can be directly replaced without detaching the valve body 100 from the pipeline, which is simple and fast and greatly improves the maintenance efficiency. It should be noted that, during the transportation or storage of the product, the first passage 110 of the valve body 100 is always closed, and after the product reaches the destination, the first passage 110 can be opened as required. Simply, the first passage 110 of the valve body may be sealed with a sealing cap 400 (see fig. 3).

Referring to fig. 1, 5 to 7, as an implementation manner, the valve body 100 is further provided with an opening and closing mechanism 120, and the opening and closing mechanism 120 is used for opening or closing the first passage 110. The switch mechanism 120 may be used in conjunction with the sealing cap 400 described above.

Further, the switching mechanism 120 includes a spool 121, a spool passage 130 is provided on the valve body 100, and the spool passage 130 communicates with the first passage 110; the spool 121 is disposed within the spool passage 130 and is capable of translating and/or rotating relative to the spool passage 130 to open or close the first passage 110.

For example, the spool channel 130 may be perpendicular to the first channel 110, one end of the spool 121 is provided with the through hole 122 perpendicular to the spool channel 130, and the spool 121 rotates relative to the spool channel 130 to realize the through hole 122 communicating with the first channel 110 (as shown in fig. 6, the spool 121 is in the on position), so as to open the first channel 110, it can be understood that when the spool 121 rotates relative to the spool channel 130, the through hole 122 may be misaligned with the first channel 110 at a certain moment (as shown in fig. 5, the spool 121 is in the off position), so as to close the first channel 110. In this embodiment, the valve element 121 may be threadedly coupled to the valve element passage 130, for example, the valve element passage 130 may be provided with an internal thread, and the valve element 121 may be externally provided with an external thread matching the internal thread, so that the valve element 121 performs both rotational and translational movements relative to the valve element passage 130. In other embodiments, the valve core 121 may also be clamped in the valve core passage 130 by clamping, and at this time, the valve core 121 only performs a rotational movement relative to the valve core passage 130.

For another example, the spool channel 130 is perpendicular to the first channel 110, the spool 121 reciprocally translates with respect to the spool channel 130, during reciprocal translation of the spool 121 with respect to the spool channel 130, one end of the spool 121 may retract with respect to a hole wall of the first channel 110 to open the first channel 110 (the spool 121 is in the on position), and one end of the spool 121 may also extend with respect to the hole wall of the first channel 110 to abut against a hole wall on a side opposite to the hole wall, so as to close the first channel 110 (the spool 121 is in the off position). The valve core 121 may be screwed into the valve core passage 130, and the valve core 121 is screwed in and out to respectively close and open the first passage 110. In other embodiments, the valve spool 121 may be slidably connected to the valve spool passage 130, and the sliding of the valve spool 121 in and out may respectively close and open the first passage 110.

Referring to fig. 3, further, the first channel 110 is divided into three sections, which are a first section channel 111, a second section channel 112 and a third section channel 113 in sequence, and both the inner diameter of the first section channel 111 and the inner diameter of the third section channel 113 are larger than the inner diameter of the second section channel 112; the spool channel 130 is communicated with the second section channel 112, so that the spool 121 controls the opening or closing of the first channel 110 by controlling the opening or closing of the second section channel 112, and because the inner diameter of the second section channel 112 is small, the pressure of the circulating medium at the second section channel 112 to the spool 121 is relatively small, and therefore the stress of the spool 121 is relatively reduced. In addition, the third passage 113 is used to weld the pipe to the valve body 100, and has an inner diameter designed according to the outer diameter of the pipe. Because the inner diameter of the third section of the channel 113 is larger than the inner diameter of the second section of the channel 112, the hole wall of the third section of the channel 113 and the hole wall of the second section of the channel 112 can form an annular end surface, and the annular end surface can also be used as a limiting surface of an external pipeline.

The fusible plug of the embodiment of the invention can directly weld the valve body 100 in a pipeline system during production and processing, at the moment, the valve core 121 needs to be adjusted to a stop position to play a role in sealing the pipeline, and because the valve body part does not contain sensitive materials 220 such as fusible alloy, the fusible plug is not influenced by the environmental temperature. According to the environment of product transportation or storage, the plug body 200 part is selectively assembled, and during assembly, only the sealing cap 400 (if any) of the valve body 100 needs to be removed, the plug body 200 is installed on the valve body 100, and the valve core 121 is adjusted to the conducting position.

According to the environment of product transportation or storage, when the environment temperature of the transportation or storage is higher, the plug body 200 can be transported or stored in a high-temperature environment in a avoided mode, and when the product is installed and used, the plug body 200 is connected with the valve body 100 to be installed, so that misoperation is avoided; when the temperature of the transportation or storage environment is not high, the plug body 200 and the valve body 100 can be directly connected and installed in production and processing, and at the moment, if the fusible plug has misoperation and needs after-sale maintenance, only the plug body 200 part can be replaced, so that the method is simple and quick, and the after-sale maintenance efficiency is greatly improved.

Embodiments of the present invention further provide a pressure device, including the fusible plug as described in any of the above embodiments. Under the use operating mode of different equipment, sensitive material not only can be the fusible alloy of temperature sensing etc. also can replace the rupture disk etc. of pressure sensing, and the rupture disk can set up in the second passageway, like this, can prevent rupture disk mistake blasting, even rupture disk mistake blasting also can conveniently change fast.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A fusible plug, comprising: the plug comprises a valve body (100) and a plug body (200), wherein the valve body (100) and the plug body (200) are detachably connected;

the valve body (100) is used for being connected with a pipeline, and a first through channel (110) is arranged on the valve body (100); the plug body (200) is provided with a second through passage (210), and the first passage (110) can be communicated with the second passage (210);

the second channel (210) is filled with sensitive material (220), and the sensitive material (220) can be changed to enable the second channel (210) to have an open state;

the valve body (100) is in threaded connection with the plug body (200);

the valve body (100) is further provided with an opening and closing mechanism (120), and the opening and closing mechanism (120) is used for opening or closing the first channel (110).

2. Fusible plug according to claim 1, characterized in that a sealing gasket (300) is also provided between the valve body (100) and the plug body (200), the sealing gasket (300) being provided with an overflowing hole (310) in the center.

3. Fusible plug according to claim 1, characterized by a sealing cap (400), the sealing cap (400) being able to be fitted over the end of the valve body (100) remote from the pipeline to seal the first passage (110).

4. The fusible plug as claimed in claim 1, wherein the switching mechanism (120) comprises a spool (121), a spool passage (130) being provided on the valve body (100), the spool passage (130) communicating with the first passage (110); the spool (121) is disposed within the spool passage (130) and is translatable and/or rotatable relative to the spool passage (130) to open or close the first passage (110).

5. The fusible plug of claim 4, wherein the spool passage (130) and the first passage (110) are perpendicular to each other; one end of the valve core (121) is provided with a leading-in hole (122) perpendicular to the valve core channel (130), and the valve core (121) rotates relative to the valve core channel (130) to realize the communication between the leading-in hole (122) and the first channel (110).

6. The fusible plug of claim 4, wherein the spool passage (130) and the first passage (110) are perpendicular to each other; the spool (121) reciprocally translates relative to the spool passage (130) to retract or extend one end of the spool (121) relative to a bore wall of the first passage (110) to open or close the first passage (110).

7. The fusible plug of claim 4, wherein the spool (121) is threadedly connected to the spool passage (130).

8. The fusible plug according to claim 4, wherein the first passage (110) is divided into three sections, namely a first section passage (111), a second section passage (112) and a third section passage (113), and the inner diameter of the first section passage (111) and the inner diameter of the third section passage (113) are both larger than the inner diameter of the second section passage (112); the spool passage (130) communicates with the second section passage (112).

9. The fusible plug according to claim 1, wherein an external thread is provided on an outer wall of one end of the valve body (100), and an internal thread hole to be engaged with the external thread is provided at one end of the plug body (200).

10. A press comprising a fusible plug as claimed in any of claims 1 to 9.