Vacuum breaking combination valve

Abstract

The utility model relates to a vacuum breaking combination valve which comprises a valve body, a guide sleeve, an elastic piece, a valve disc and a one-way exhaust assembly. A channel is formed in the valve body and is communicated with the pipeline; the guide sleeve is fixedly installed in the valve body, an air inlet hole is formed in the guide sleeve, the valve disc is installed in the valve body and abuts against one end of the guide sleeve to block the air inlet hole, a valve rod is fixedly installed on the valve disc, and the valve rod penetrates through the guide sleeve and is in sliding fit with the guide sleeve; the elastic piece sleeves the valve rod, one end of the elastic piece abuts against the top of the guide sleeve, and the other end of the elastic piece acts on the valve rod; an exhaust pipe is installed on one side of the valve body and communicated with the valve body, a one-way exhaust assembly is installed on the exhaust pipe, and when the pressure in the valve body is too high, the pressure is exhausted through the one-way exhaust assembly. When the pipeline is in negative pressure, external air is introduced to damage vacuum and prevent siphoning, and when the pressure of the pipeline is too high, high-pressure gas is exhausted through the one-way exhaust assembly to protect the pipeline from being impacted by too high pressure.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the valve field relates to a vacuum breaking combination valve. BACKGROUND

[0002] In various technical fields related to pipeline systems, especially hydraulic pipeline systems, vacuum environment and pressure control are crucial links. The traditional vacuum breaking valve is a common device used to control the vacuum state in the pipeline. Its working principle is to open the movable valve plate driven by negative pressure, so that external gas can enter the pipeline, thereby breaking the vacuum state formed in the pipeline, effectively preventing the occurrence of siphon effect and ensuring the normal operation of the pipeline system.

[0003] However, the vacuum breaking valve in the prior art has a single function, which is limited to breaking the vacuum environment. In the actual operation of the hydraulic pipeline, not only can the siphon effect be caused by the vacuum environment, but also the risk of excessive pressure in the pipeline. When the pressure in the pipeline exceeds the safe range it can withstand, it is likely to cause damage such as rupture and deformation of the pipeline, which not only affects the normal operation of the pipeline system, but also may cause safety hazards such as leakage, increasing maintenance costs and downtime. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a vacuum breaking combination valve with multifunctionality for easy use.

[0005] The application provides a technical scheme as follows:

[0006] A vacuum breaking combination valve includes a valve body, a guide sleeve, a spring, a valve disc, and a one-way exhaust assembly. The valve body has a channel formed therein, which is in communication with the pipeline. The guide sleeve is fixedly installed in the valve body, and the guide sleeve has an air inlet hole for introducing air into the valve body. The valve disc is installed in the valve body and abuts against one end of the guide sleeve to block the air inlet hole. The valve disc has a valve rod fixedly installed thereon, and the valve rod passes through the guide sleeve and is in sliding cooperation with the guide sleeve. The spring is sleeved on the valve rod, one end of the spring abuts against the top of the guide sleeve, and the other end of the spring acts on the valve rod. The valve body has an exhaust pipe installed on one side, and the exhaust pipe has a one-way exhaust assembly installed thereon for discharging high-pressure medium in the valve body.

[0007] By adopting the technical scheme, a multifunctional valve structure system is constructed, which integrates the functions of vacuum breaking and pressure relief; when the pipeline is under negative pressure, external air can be introduced to break the vacuum and prevent siphoning; when the pipeline pressure is too high, high-pressure gas can be discharged through the one-way exhaust assembly to protect the pipeline from high pressure impact. The number of valves required by the pipeline system is reduced, and there is no need to separately install a vacuum breaking valve and a separate pressure relief valve, which simplifies the pipeline layout, reduces the installation and maintenance costs, and improves the reliability and stability of the overall system operation.

[0008] Preferably, an air inlet filter assembly is mounted on the valve body, which includes a filter screen and a cover body, the cover body is arranged on the top of the valve body, the filter screen is mounted in the cover body, and an air inlet is formed in the cover body.

[0009] By adopting the technical scheme, the air inlet filter assembly is provided to filter the air entering the pipeline. The filter screen blocks dust, impurities and other foreign matters from entering the pipeline, preventing these foreign matters from accumulating in the pipeline and wearing out equipment components, such as blocking the valve port and affecting the performance of the elastic member, thereby ensuring the cleanliness of the pipeline system and improving the operation time and stability of the pipeline system.

[0010] Preferably, a mounting step is formed on the end of the valve body away from the pipeline, a compression ring is fixedly arranged at the bottom of the cover body, the compression ring is matched with the mounting step, and the compression ring is fixedly connected with the mounting step.

[0011] By adopting the technical scheme, the compression ring is provided to provide a stable mounting structure for the air inlet filter assembly, which ensures that the air inlet filter assembly will not be loose or displaced under the working conditions of pipeline operation vibration, and guarantees the continuous effectiveness of the filtering function.

[0012] Preferably, an annular gasket is arranged between the compression ring and the mounting step, and an annular gasket is arranged between the guide sleeve and the mounting step.

[0013] By adopting the technical scheme, the annular gaskets are arranged between the compression ring and the mounting step and between the guide sleeve and the mounting step. The leakage and failure risks caused by sealing failure and component loosening are reduced, the maintenance frequency is reduced, the influence of vibration on the surrounding equipment is reduced, and the stability and safety of the entire pipeline system operation are improved.

[0014] Preferably, the one-way exhaust assembly includes an exhaust valve body and a valve core ball, the exhaust valve body is fixedly connected with the end of the exhaust pipe away from the valve body, and the exhaust valve body is in communication with the exhaust pipe; the valve core ball is located in the exhaust valve body, the end of the exhaust pipe located in the exhaust valve body is opposite to the valve core ball, a protective cover is arranged on the top of the exhaust valve body, and an exhaust hole is formed in the protective cover.

[0015] By adopting the technical scheme, one-way control and pressure self-adaptive adjustment of exhaust are realized. The ball of the valve core is adsorbed and blocked under negative pressure, so that the system pressure is maintained stable; the ball of the valve core stably falls back under normal pressure without affecting exhaust; the ball of the valve core is punched open by gas under high pressure to discharge, so that the exhaust process is accurately controlled, the pipeline is protected from high pressure, the safe and stable operation of the pipeline is ensured, and the overall operation efficiency is improved.

[0016] Preferably, a discharge ball valve switch for controlling the medium in the exhaust pipe is installed on the exhaust pipe.

[0017] By adopting the technical scheme, the adaptability of the valve to different working conditions is enhanced, the exhaust process is optimized, the stability of system operation is improved, the pipeline is protected by closing the ball valve switch when the exhaust valve body fails, and the failure and adjustment time caused by improper exhaust are reduced.

[0018] Preferably, a fixed support is installed on one end of the exhaust pipe close to the exhaust valve body, and the fixed support is fixedly connected with the valve body.

[0019] By adopting the technical scheme, reliable support is provided for the exhaust pipe and the exhaust valve body, the stable operation of the exhaust system is ensured, the failure such as poor exhaust and leakage caused by loosening and deformation of the exhaust pipe is reduced, the maintenance frequency is reduced, and the operation reliability and durability of the entire vacuum breaking combined valve and even the pipeline system are improved.

[0020] Preferably, a pressing plate is sleeved on the valve rod, the pressing plate is located at one end of the elastic member away from the guide sleeve, and the pressing plate and the elastic member are in abutment; and a nut is installed on one end of the valve rod away from the valve disc, and the nut is in abutment with the pressing plate.

[0021] By adopting the technical scheme, the elastic member is provided with a reliable fixing mode through the cooperation of the pressing plate and the nut. It is ensured that the elastic member is always in a stable compression or relaxation state during the valve operation, it is ensured that the valve disc can accurately respond to the pressure change in the pipeline, the plugging or opening of the inlet hole is stably realized, the accuracy and repeatability of the valve action are improved, the stability of the valve during long-time operation is improved, the time loss caused by valve fault investigation and maintenance is reduced, and the continuous operation efficiency of the pipeline system is ensured.

[0022] Preferably, a sealing ring is installed on one end of the guide sleeve close to the valve disc, and the sealing ring is in abutment with the valve disc.

[0023] By adopting the technical scheme, the sealing ring is added as a sealing structure, the sealing performance between the valve disc and the guide sleeve is strengthened, and medium leakage is effectively prevented. Especially when the pipeline handles corrosive, polluting or valuable medium, material loss, environmental pollution and equipment corrosion damage caused by leakage are avoided, additional work such as subsequent cleaning, repair and replenishment of medium is reduced, and the overall operation efficiency of the pipeline system is improved.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. A multifunctional valve structure system is constructed, which integrates the functions of vacuum breaking and pressure relief. It can introduce external air to break the vacuum when the pipeline is under negative pressure, preventing siphoning. When the pipeline pressure is too high, the high-pressure gas is discharged through the one-way exhaust assembly, protecting the pipeline from excessive pressure impact. The number of valves required for the pipeline system is reduced, eliminating the need for separate installation of vacuum breaking valves and separate pressure relief valves, simplifying the pipeline layout, reducing installation and maintenance costs, and improving the overall system operation reliability and stability;

[0026] 2. By cooperating the pressure plate and the nut, a reliable fixing method is provided for the elastic element. It ensures that the elastic element is always in a stable compression or relaxation state during valve operation, ensuring that the valve disc can accurately respond to changes in pipeline pressure, stably achieving the plugging or opening of the air inlet hole, improving the accuracy and repeatability of valve operation, improving the stability of long-term valve operation, reducing time loss due to valve fault investigation and maintenance, and ensuring the continuous operation efficiency of the pipeline system;

[0027] 3. The sealing ring is added to the sealing structure, which strengthens the sealing performance between the valve disc and the guide sleeve, effectively preventing medium leakage. Especially when dealing with pipelines that handle corrosive, polluting or valuable media, material loss, environmental pollution and equipment corrosion damage caused by leakage are avoided, additional work such as subsequent cleaning, repair and replenishment of media is reduced, and the overall operation efficiency of the pipeline system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is the overall structure of the present application sectional view;

[0029] Figure 2 is the top view of the present application for display guide sleeve.

[0030] Reference signs: 1, valve body; 11, mounting step; 2, guide sleeve; 21, air inlet hole; 3, elastic element; 4, valve disc; 41, valve stem; 5, one-way exhaust assembly; 51, exhaust valve body; 511, exhaust hole; 52, valve core ball; 53, protective cover; 6, air inlet filter assembly; 61, filter screen; 62, cover body; 621, air inlet; 7, exhaust pipe; 71, exhaust port; 8, pressure plate; 9, sealing ring; 10, fixed support; 12, ball valve switch; 13, gasket; 14, pressure ring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings Figures 1-2 The present application is further described in detail.

[0032] The embodiment of the utility model discloses a vacuum breaking combined valve, refer to Figure 1 And Figure 2 , including valve body 1, guide sleeve 2, elastic part 3, valve disc 4 and one -way exhaust component 5, the channel is formed in valve body 1, and the channel is communicated with pipeline, guide sleeve 2 is fixedly installed in valve body 1, and the air inlet hole 21 for going into air to valve body 1 is set up on guide sleeve 2, and valve disc 4 is located in valve body 1 and with guide sleeve 2 one end abuts to carry out the plugging of air inlet hole 21, and valve stem 41 is fixedly installed on valve disc 4, and valve stem 41 passes through guide sleeve 2 and with guide sleeve 2 sliding fit, elastic part 3 is set on valve stem 41, and elastic part 3 one end with guide sleeve 2 top abuts, and the other end acts on valve stem 41, one side of valve body 1 is installed with exhaust pipe 7, and exhaust pipe 7 is communicated with valve body 1, and one -way exhaust component 5 is installed on exhaust pipe 7, when the medium pressure in valve body 1 is too high, the medium one -way exhaust component 5 is discharged.

[0033] When the pressure in pipeline is negative pressure, under the action of pressure difference, negative pressure makes valve disc 4 adsorb to the one end of pipeline, and valve disc 4 drives valve stem 41 to move, so that elastic part 3 is further compressed, so that valve disc 4 and guide sleeve 2 are in contact, and the spacing between the two increases, and the outside air enters into pipeline from air inlet hole 21 to destroy the vacuum environment of pipeline. When the internal and external air pressure of valve body 1 tends to be balanced, elastic part 3 is elongated and pushes valve disc 4 to abut to guide sleeve 2, and air inlet hole 21 is blocked.

[0034] When the pressure in pipeline is too large, valve disc 4 is firmly pushed by high pressure and covers guide sleeve 2, and high-pressure gas enters one-way exhaust component 5 from exhaust pipe 7 and is discharged from one-way exhaust component 5, realizing the release of the overhigh pressure in pipeline and avoiding the damage of pipeline due to the overhigh internal pressure.

[0035] Refer to Figure 1 Valve stem 41 is also sleeved with pressing plate 8, and pressing plate 8 is located at the end of elastic part 3 away from guide sleeve 2, and pressing plate 8 and elastic part 3 abut; the end of valve stem 41 away from valve disc 4 is formed with a thread, and the end of pressing plate 8 away from elastic part 3 is provided with a nut, and the nut is two. Valve stem 41 is threadedly connected with the nut, and the nut abuts against pressing plate 8, and the nut is tightened to make pressing plate 8 and elastic part 3 firmly abut.

[0036] The end of guide sleeve 2 close to valve disc 4 is provided with sealing ring 9, and sealing ring 9 abuts against valve disc 4; in the working process of the valve, sealing ring 9 improves the sealing performance of valve disc 4 and guide sleeve 2 in the abutting state, which can effectively prevent the medium from passing through the gap between guide sleeve 2 and valve disc 4.

[0037] Refer to Figure 1The valve body 1 is provided with an air inlet filter assembly 6, which comprises a filter screen 61 and a cover body 62. The filter screen 61 is in the shape of a circular ring and is arranged in the cover body 62. The cover body 62 is arranged on the top of the valve body 1 and is provided with an air inlet port 621. When the pipeline is under negative pressure, external air enters the cover body 62 through the air inlet port 621, is filtered by the filter screen 61, then passes through the air inlet hole 21 of the guide sleeve 2 and finally enters the pipeline through the channel of the valve body 1 to destroy the vacuum environment in the pipeline. The filter screen 61 can reduce equipment failure caused by dust and ensure stable operation.

[0038] The valve body 1 is provided with an air inlet filter assembly 6, which comprises a filter screen 61 and a cover body 62. The filter screen 61 is in the shape of a circular ring and is arranged in the cover body 62. The cover body 62 is arranged on the top of the valve body 1 and is provided with an air inlet port 621. When the pipeline is under negative pressure, external air enters the cover body 62 through the air inlet port 621, is filtered by the filter screen 61, then passes through the air inlet hole 21 of the guide sleeve 2 and finally enters the pipeline through the channel of the valve body 1 to destroy the vacuum environment in the pipeline. The filter screen 61 can reduce equipment failure caused by dust and ensure stable operation.

[0039] The valve body 1 is provided with an air inlet filter assembly 6, which comprises a filter screen 61 and a cover body 62. The filter screen 61 is in the shape of a circular ring and is arranged in the cover body 62. The cover body 62 is arranged on the top of the valve body 1 and is provided with an air inlet port 621. When the pipeline is under negative pressure, external air enters the cover body 62 through the air inlet port 621, is filtered by the filter screen 61, then passes through the air inlet hole 21 of the guide sleeve 2 and finally enters the pipeline through the channel of the valve body 1 to destroy the vacuum environment in the pipeline. The filter screen 61 can reduce equipment failure caused by dust and ensure stable operation.

[0040] Referring to Figure 1 The one-way air exhaust assembly 5 comprises an exhaust valve body 51, a valve core ball 52 and a protective cover 53. The exhaust valve body 51 is fixedly connected to the end of the exhaust pipe 7 away from the valve body 1 and is in communication with the exhaust pipe 7. The port of the exhaust pipe 7 in the exhaust valve body 51 is provided as an exhaust port 71. The valve core ball 52 is located in the exhaust valve body 51 and opposite to the exhaust port 71. The protective cover 53 is arranged on the top of the exhaust valve body 51 and is used for sealing the exhaust valve body 51. The protective cover 53 is fixedly connected to the exhaust valve body 51 by bolts and is provided with an exhaust hole 511.

[0041] When the pipeline is under negative pressure, the valve core ball 52 is adsorbed on the exhaust port 71 and blocks the exhaust port 71 to ensure that air can only enter the pipeline from the side of the air inlet filter assembly 6. When the pressure in the pipeline is within the normal requirement or use range, the valve core ball 52 will be stably dropped into the exhaust port 71 and block the exhaust port 71 by its own gravity. When the pressure in the pipeline is too large, high-pressure gas enters the exhaust valve body 51 through the exhaust pipe 7, the high-pressure gas pushes away the valve core ball 52 and finally is discharged from the exhaust hole 511.

[0042] The exhaust pipe 7 is provided with a ball valve switch 12, which is in an open state by default. When the ball valve switch 12 is opened, the medium will enter the exhaust pipe 7 and be discharged from the exhaust hole 511 on the exhaust valve body 51. When the exhaust valve body fails or the valve core ball cannot work normally, the medium may leak out through the exhaust pipe 7 and the exhaust valve body 51. At this time, the ball valve switch 12 is closed, so as to cut off the flow path of the medium, so as to facilitate timely maintenance and replacement.

[0043] The fixed support 10 is arranged on one end of the exhaust pipe 7 close to the exhaust valve body 51, and the fixed support 10 is arranged towards the valve body 1, and the fixed support 10 and the valve body 1 are bolted.

[0044] The implementation principle of the embodiment of the application is:

[0045] When the pipeline is in negative pressure, the pressure difference causes the valve disc 4 to be adsorbed to the pipeline end, drives the valve rod 41 to compress the elastic member 3, and causes the valve disc 4 to be separated from the guide sleeve 2, and the inlet hole 21 is opened. The outside air enters the inlet hole 621 of the air inlet filter assembly 6, is filtered through the filter screen 61, enters the pipeline through the inlet hole 21 and the valve body 1 channel, and destroys the vacuum environment.

[0046] When the internal and external air pressure is balanced, the elastic member 3 is elongated to push the valve disc 4 to block the inlet hole 21. When the pressure in the pipeline is too large, the valve disc 4 is pressed against the cover guide sleeve 2 by high pressure, and the high-pressure gas enters the one-way exhaust assembly 5 from the exhaust pipe 7.

[0047] When the pressure is large enough, the valve core ball 52 in the one-way exhaust assembly 5 is knocked off, the gas is discharged from the exhaust hole 511, the excessive high pressure is released, and the pipeline is protected.

[0048] The above are preferred embodiments of the application, and are not limited to the protection scope of the application. Therefore, equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A vacuum breaking combination valve, characterized in that, The system includes a valve body (1), a guide sleeve (2), an elastic element (3), a valve disc (4), and a one-way exhaust assembly (5). A channel is formed within the valve body (1), and the channel communicates with a pipeline. The guide sleeve (2) is fixedly installed within the valve body (1), and an air inlet (21) is provided on the guide sleeve (2) for introducing air into the valve body (1). The valve disc (4) is installed within the valve body (1) and abuts against one end of the guide sleeve (2) to seal the air inlet (21). A [missing information - likely a component or component] is fixedly installed on the valve disc (4). A valve stem (41) passes through a guide sleeve (2) and slides with the guide sleeve (2); an elastic element (3) is sleeved on the valve stem (41), one end of the elastic element (3) abuts against the top of the guide sleeve (2), and the other end of the elastic element (3) acts on the valve stem (41); an exhaust pipe (7) is installed on one side of the valve body (1), the exhaust pipe (7) is connected to the valve body (1), and a one-way exhaust assembly (5) for discharging the high-pressure medium inside the valve body (1) is installed on the exhaust pipe (7).

2. The vacuum breaking combination valve according to claim 1, characterized in that, An air intake filter assembly (6) is installed on the valve body (1). The air intake filter assembly (6) includes a filter screen (61) and a cover (62). The cover (62) covers the top of the valve body (1). The filter screen (61) is installed inside the cover (62). An air intake port (621) is provided on the cover (62).

3. The vacuum breaking combination valve according to claim 2, characterized in that, The valve body (1) has an installation step (11) formed at the end away from the pipeline. The bottom of the cover (62) is fixedly provided with a pressure ring (14). The pressure ring (14) is adapted to the installation step (11) and the pressure ring (14) is fixedly connected to the installation step (11).

4. A vacuum breaking combination valve according to claim 3, characterized in that, An annular gasket (13) is installed between the pressure ring (14) and the mounting step (11), and an annular gasket (13) is installed between the guide sleeve (2) and the mounting step (11). The guide sleeve (2) and the mounting step (11) are fixedly connected.

5. A vacuum breaking combination valve according to claim 1, characterized in that, The one-way exhaust assembly (5) includes an exhaust valve body (51), a valve core ball (52), and a protective cover (53). The exhaust valve body (51) is fixedly connected to the end of the exhaust pipe (7) away from the valve body (1), and the exhaust valve body (51) is connected to the exhaust pipe (7). The valve core ball (52) is located inside the exhaust valve body (51), and the port of the exhaust pipe (7) located inside the exhaust valve body (51) is opposite to the valve core ball (52). The protective cover (53) is located on the top of the exhaust valve body (51), and an exhaust hole (511) is provided on the protective cover (53).

6. A vacuum breaking combination valve according to claim 1, characterized in that, The exhaust pipe (7) is equipped with a discharge ball valve switch (12) for controlling the medium inside the exhaust pipe (7).

7. A vacuum breaking combination valve according to claim 6, characterized in that, A fixed bracket (10) is installed at one end of the exhaust pipe (7) near the exhaust valve body (51), and the fixed bracket (10) is fixedly connected to the valve body (1).

8. A vacuum breaking combination valve according to claim 1, characterized in that, A pressure plate (8) is fitted on the valve stem (41). The pressure plate (8) is located at the end of the elastic element (3) away from the guide sleeve (2). The pressure plate (8) and the elastic element (3) abut against each other. A nut is installed at the end of the valve stem (41) away from the valve disc (4). The nut abuts against the pressure plate (8).

9. A vacuum breaking combination valve according to claim 1, characterized in that, A sealing ring (9) is installed at one end of the guide sleeve (2) near the valve disc (4), and the sealing ring (9) abuts against the valve disc (4).

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