Novel self-operated balance valve and pipeline assembly

Abstract

The invention is suitable for the technical field of valve manufacturing, and provides a novel self-operated balance valve and a pipeline assembly. A novel self-operated balance valve comprises a valve body, a diaphragm assembly and a second valve element assembly. A fixing plate is arranged in the valve body and divides the interior of the valve body into a first cavity and a first flowing cavity. The diaphragm assembly is arranged in the valve body and divides the first cavity into a signal cavity and a control cavity, a medium inlet and a medium outlet are formed in the valve body, the first flowing cavity is communicated with the medium inlet and the medium outlet, the first valve seat is fixedly connected in the valve body, the first valve element is arranged in the first flowing cavity, and the second valve element is arranged in the second flowing cavity. The first valve seat is matched with the first valve seat to control connection and disconnection from the medium inlet to the medium outlet; an input port is formed in the signal cavity and communicated with an external signal pressure source, the control cavity is communicated with a medium outlet through a feedback pipe, the second valve element assembly is coaxially arranged on the diaphragm assembly, and the diaphragm assembly responds to the pressure difference between the signal cavity and the control cavity and drives the first valve element and the second valve element assembly to move.

Description

TECHNICAL FIELD

[0001] The present application is suitable for the technical field of valve manufacturing, and in particular relates to a novel self-balancing valve and pipeline assembly. BACKGROUND

[0002] In the fields of tire vulcanization, industrial fluid control, etc., the self-balancing valve is the core component for maintaining the stability of system pressure. The traditional self-balancing valve usually adopts a single valve core structure, and adjusts the opening degree of the main valve core by sensing the outlet pressure change of the diaphragm to realize pressure control. However, the prior art has the following significant defects: When the system outlet pressure abnormally rises (such as more than 20% higher than the set value), the traditional valve cannot actively release pressure, and must rely on an external branch to discharge the overpressure medium to the atmosphere. This not only increases the complexity of the pipeline, such as the need to additionally install valves, pressure gauges and connecting parts, but also causes the cost of equipment to rise, and the multi-interface structure is prone to cause leakage risks.

[0003] After the sizing process is completed, the operator needs to manually switch the state of the three-way shut-off valve to guide the high-pressure steam / nitrogen in the capsule to the atmosphere, so that the pressure gauge is zeroed. If the operation is delayed, the system will continue to alarm at high pressure, causing the production line to stop, which seriously restricts the production efficiency.

[0004] The present application is suitable for the technical field of valve manufacturing, and in particular relates to a novel self-balancing valve and pipeline assembly. SUMMARY

[0005] The present application provides a novel self-balancing valve and pipeline assembly, and the technical scheme is as follows: A novel self-balancing valve, comprising a valve body, a diaphragm assembly and a second valve core assembly; a fixed plate is arranged in the valve body, which divides the valve body into a first chamber and a first flow chamber; the diaphragm assembly is arranged in the valve body, which divides the first chamber into a signal chamber and a control chamber; a medium inlet and a medium outlet are arranged on the valve body, the first flow chamber is connected with the medium inlet and the medium outlet, a first valve seat is fixedly connected in the valve body, and a first valve core is arranged in the first flow chamber to control the on-off of the medium inlet to the medium outlet in cooperation with the first valve seat; an input port is arranged on the signal chamber, which is connected with an external signal pressure source; the control chamber is connected with the medium outlet through a feedback pipe; the second valve core assembly is coaxially arranged on the diaphragm assembly; the diaphragm assembly drives the first valve core and the second valve core assembly to move in response to the pressure difference between the signal chamber and the control chamber.

[0006] On the basis of the above technical scheme, the second valve core assembly comprises a second valve seat and a second valve core, a base is arranged at the bottom of the valve body, a pressure relief hole is arranged on the second valve seat, a first pressure relief channel leading to the base is arranged on the second valve core, and the second valve seat and the second valve core cooperate to realize the on-off between the first flow chamber and the first pressure relief channel.

[0007] On the basis of the above technical solutions, the second valve core bottom is fixedly connected with a valve rod, an axially-through first pressure relief channel is arranged in the valve rod, the valve rod coaxially penetrates the center through hole of the first valve core, a second spring is arranged at the bottom end of the valve rod, and the second spring abuts against the inner wall of the base.

[0008] Preferably, the diaphragm assembly comprises a first partition plate and a first diaphragm, the first diaphragm is made of an elastic material, the first diaphragm is arranged on the first partition plate, a pressure relief baffle is slidably connected in the second valve seat, a valve seat first flow channel and a valve seat second flow channel are arranged in the second valve seat, the valve seat first flow channel is communicated with the first pressure relief channel, the valve seat second flow channel is communicated with the pressure relief hole, the first spring abuts against the pressure relief baffle, and the first spring applies an elastic force to the pressure relief baffle, so as to make the pressure relief baffle communicate or disconnect the passage between the valve seat flow channel and the valve seat second flow channel.

[0009] A pipeline assembly comprises a first filter, the novel self-balancing valve, a check valve, a three-way cut-off valve and a ball valve which are sequentially connected in a pipeline.

[0010] Advantages Compared with the prior art, the advantages of the present application are: 1. The present application designs a self-balancing valve with a two-stage pressure relief mechanism, which can actively relieve pressure when the outlet pressure of the system abnormally rises. In particular, when the outlet pressure of the medium is significantly higher than the signal pressure, the excess medium is quickly discharged through the pressure relief hole, without relying on external branches and additional valves, thereby simplifying the pipeline layout, reducing equipment costs, and reducing the risk of leakage caused by multiple interface structures. 2. After the traditional sizing process is completed, the operator needs to manually switch the state of the three-way cut-off valve to release the high-pressure steam or nitrogen gas in the capsule. However, the novel self-balancing valve in the present application can automatically complete this process after the sizing stage is completed, making the pressure gauge value zero, avoiding system high-pressure alarms and production line shutdown problems caused by operation delays, and greatly improving production efficiency and system stability. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only one embodiment of the present application, and for those skilled in the art, other drawings can be derived from the provided drawings without creating labor.

[0012] Figure 1 The novel self-balancing valve structure of the present application is shown in the sectional view. Figure 2 The internal structure of the novel self-balancing valve of the present application is shown. Figure 3 : The position relation diagram of the diaphragm assembly of the application; Figure 4 : The position relation diagram of the first flow channel of the valve seat and the second flow channel of the valve seat of the application; Figure 5 : The position relation diagram of the first valve core and the second valve core of the application; Figure 6 : The structure diagram of the pipeline assembly of the application; Figure 7 : The pipeline assembly diagram of the application after installing the second filter.

[0013] Figure 8 : The traditional balanced valve pipeline assembly diagram. DETAILED DESCRIPTION

[0014] The application will be further described below in conjunction with the drawings and examples: The embodiments of the application will be described in detail below with reference to the drawings, in which the same or similar components have the same reference numerals throughout. The embodiments described below are exemplary only, and are not intended to limit the present application.

[0015] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, or detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0016] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0017] As shown in Figure 1 and Figure 2 A new self-balanced valve, comprising a valve body 1, a diaphragm assembly 3 and a second valve core assembly 4; a fixed plate 17 is arranged in the valve body 1, which divides the valve body 1 into a first chamber and a first flow chamber 13; the diaphragm assembly 3 is arranged in the valve body 1, which divides the first chamber into a signal chamber 16 and a control chamber 14.

[0018] The fixed plate 17 divides the valve body 1 into two main areas: the first chamber and the first flow cavity 13. The first flow cavity 13 is directly involved in the flow of medium, while the first chamber is used to accommodate control components, achieving functional division in physical space. Further, the diaphragm assembly 3 creates a signal cavity 16 and a control cavity 14 in the first chamber, which are responsible for receiving external signal pressure and pressure changes at the feedback outlet, respectively.

[0019] The valve body 1 is provided with a medium inlet 11 and a medium outlet 12, and the first flow cavity 13 communicates the medium inlet 11 and the medium outlet 12. The first valve seat 21 is fixed in the valve body 1, and the first valve core 22 is arranged in the first flow cavity 13 to control the on-off of the medium inlet 11 to the medium outlet 12 in cooperation with the first valve seat 21.

[0020] The first valve core 22 cooperates with the first valve seat 21 to accurately control the flow of medium as needed. This allows the valve to adapt to different working requirements and provide accurate pressure and flow regulation functions.

[0021] The signal cavity 16 is provided with an input port 161 that communicates with an external signal pressure source. The control cavity 14 communicates with the medium outlet 12 through a feedback pipe 15, The input port 161 allows the external signal pressure to act directly on the signal cavity 16, while the control cavity 14 receives actual pressure feedback from the medium outlet 12 through the feedback pipe 15. This design allows the valve to automatically adjust based on the difference between the externally set signal pressure and the actual outlet pressure, thereby achieving precise control of the medium flow pressure.

[0022] The input port 161 communicates with an external signal pressure source, which is an independent pressure regulating system or device that can generate and maintain a specific pressure value to control the working state of the pressure reducing valve, such as an electronic pneumatic regulator.

[0023] The second valve core assembly 4 is coaxially arranged on the diaphragm assembly 3, and the diaphragm assembly 3 drives the first valve core 22 and the second valve core assembly 4 to move in response to the pressure difference between the signal cavity 16 and the control cavity 14.

[0024] As Figure 3 and Figure 4As shown, the second valve core assembly 4 includes a second valve seat 41 and a second valve core 42. A base 6 is provided at the bottom of the valve body 1. The second valve seat 41 is provided with a pressure relief hole 411, and the second valve core 42 is provided with a first pressure relief channel 431 leading to the base 6. The second valve seat 41 and the second valve core 42 cooperate to close the first flow chamber 13 and the first pressure relief channel 431. A planar seal is formed between the second valve seat 41 and the second valve core 42, providing a reliable sealing effect.

[0025] Since the second valve core assembly is directly connected to the diaphragm assembly 3 and can respond to the pressure difference between the signal chamber 16 and the control chamber 14, the valve state can be adjusted quickly.

[0026] like Figure 5 As shown, the bottom of the second valve core 42 is fixedly connected to the valve stem 43. The valve stem 43 has an axially penetrating first pressure relief channel 431 inside. The valve stem 43 coaxially passes through the central through hole of the first valve core 22. A second spring 44 is installed at the bottom of the valve stem 43, and the second spring 44 abuts against the inner wall of the base 6.

[0027] Pressure can be directly guided from the second valve core 42 to the base 6 for release through the axially penetrating first pressure relief channel 431 inside the valve stem 43. The base 6 is provided with an outlet path for discharging the medium.

[0028] The elastic force provided by the second spring 44 can automatically reset the second valve core 42, valve stem 43 and first valve core 22 when there is no signal pressure, ensuring the normal closed state of the system and preventing leakage.

[0029] The diaphragm assembly 3 includes a first partition 31 and a first diaphragm 32. The first diaphragm 32 is made of an elastic material and is disposed on the first partition 31. A pressure relief baffle 33 is slidably connected inside the second valve seat 41. The second valve seat 41 is provided with a first valve seat flow channel 401 and a second valve seat flow channel 402. The first valve seat flow channel 401 is connected to a first pressure relief channel 431, and the second valve seat flow channel 402 is connected to a pressure relief hole 411. A first spring 34 abuts against the pressure relief baffle 33. The first spring 34 applies elastic force to the pressure relief baffle 33 to connect or disconnect the passage between the valve seat flow channel 401 and the valve seat second flow channel 402.

[0030] The first diaphragm 32 is made of an elastic material and can sensitively respond to changes in the pressure difference between the signal chamber 16 and the control chamber 14. When the pressure changes, the diaphragm deforms rapidly, thereby driving the valve core assembly (second valve core 42, valve stem 43 and first valve core 22) to make corresponding adjustments, ensuring a fast and accurate response.

[0031] The pressure relief hole 411 is a spherical hole. The design of the spherical hole can reduce the resistance of the fluid when passing through. Compared with the traditional right angle or square hole, the spherical hole has a more smooth transition surface, which helps to reduce the turbulence and pressure loss of the fluid when passing through the pressure relief hole, thereby improving the overall fluid passing efficiency.

[0032] The first filter screen 51 is arranged on the medium inlet 11, the second filter screen 52 is arranged in the first flow cavity 13, and the third filter screen 53 is arranged in the second flow channel 402 of the valve seat. Through multi-stage filtration, impurities, particles and other contaminants in the medium can be effectively removed, preventing these substances from entering the internal valve and causing wear or damage to key components such as the valve core, diaphragm, etc. This helps to prolong the service life of the valve and reduce the frequency of failures caused by pollution.

[0033] The second diaphragm 62 is arranged on the second partition plate 61 in the base 6. The second diaphragm 62 can be used to assist in sealing or as another level of pressure sensing component to ensure pressure isolation or conversion between the inside of the base 6 and the outside or other chambers.

[0034] The first sealing ring 81 is arranged between the valve body 1 and the second valve seat 41, the second sealing ring 82 is arranged between the valve body 1 and the first valve seat 21, and the third sealing ring 83 is arranged between the valve body 1 and the base 6. The main function of the sealing ring is to prevent leakage of the medium. By installing sealing rings at key interfaces, it can ensure that these connection parts have good sealing performance, effectively preventing the medium from leaking from the inside of the valve to the outside, thereby ensuring the normal operation and safety of the system.

[0035] Without external signal pressure input, the first valve core 22 tightly fits the first valve seat 21, preventing the medium from flowing from the medium inlet 11 to the medium outlet 12. The second valve core assembly 4 is also in the closed position, preventing the medium from leaking through the pressure relief hole 411 or the first pressure relief channel 431.

[0036] When the external signal pressure enters the signal cavity 16 through the input port 161, the signal pressure pushes the diaphragm assembly 3 to move downward, thereby driving the first valve core 22 and the second valve core assembly 4 to act together. The first valve core 22 leaves the first valve seat 21, opening the medium flow path, so that the medium can flow from the medium inlet 11 to the medium outlet 12 through the first flow cavity 13.

[0037] The pressure of the medium outlet is transmitted to the control cavity 14 through the feedback pipe 15, generating an upward reaction force on the diaphragm assembly 3. As the outlet pressure increases, the diaphragm assembly 3 gradually moves upward, reducing the opening between the first valve core 22 and the first valve seat 21, thereby adjusting the medium flow to make the outlet pressure tend to the set value.

[0038] The outlet pressure and the signal pressure difference can set a pressure threshold.

[0039] Primary overpressure: If the outlet pressure exceeds the signal pressure, and the outlet pressure is not much greater than the signal pressure, i.e. the difference is less than the pressure threshold, the diaphragm assembly 3 will move further upwards, causing the second spool assembly 4 to open, allowing part of the medium to be discharged through the first pressure relief channel 431 to reduce the system pressure back to the set range.

[0040] Secondary overpressure: If the outlet pressure exceeds the signal pressure, and the outlet pressure is much greater than the signal pressure, i.e. the difference is greater than the pressure threshold, the diaphragm assembly 3 will move further upwards, causing the second spool assembly 4 to open, and the pressure will pass through the first flow cavity 13, the valve seat first flow passage 401 to lift the pressure relief baffle 33, and the pressure will enter the valve seat second flow passage 402 and be discharged from the pressure relief hole 411. At the same time, the first pressure relief channel 431 also discharges pressure.

[0041] Primary overpressure is quickly responded by the first pressure relief channel 431, and secondary overpressure is discharged in large flow through the pressure relief hole 411 and the first pressure relief channel 431, ensuring system safety.

[0042] As shown in Figure 6 , a pipeline assembly includes a first filter 71, a new self-balancing valve 72 as described above, a check valve 73, a three-way shut-off valve 74, and a ball valve 75 connected in sequence.

[0043] The three-way shut-off valve 74 is provided with a main first interface 741, a main second interface 742, and a main third interface 743, wherein the main third interface 743 is connected to one of high-pressure steam, high-pressure nitrogen, or superheated water.

[0044] The ball valve 75 is followed by a capsule, which refers to a key component in a tire curing machine - a curing bladder (also known as a curing bag). The curing bladder is a hollow, elastic container usually made of heat-resistant rubber. It is located inside the tire curing machine. During the tire curing process, the curing bladder is used to contain heating media such as steam or superheated water, and sometimes high-pressure nitrogen. These media transfer heat and pressure through the capsule, allowing the tire to complete the curing process in a high-temperature and high-pressure environment.

[0045] As shown in Figure 8 , a conventional balancing valve without self-pressure relief function needs to be connected to an additional branch three-way shut-off valve 78 to achieve pressure regulation during the shaping process. The branch three-way shut-off valve 78 is provided with a first interface 781, a second interface 782, and a third interface 783, wherein the second interface 782 is connected to a pressure gauge, and the third interface 783 is connected to the atmosphere.

[0046] When the conventional balance valve 77 is used, the setting steam or nitrogen enters the first filter 71, and after filtration, enters the conventional balance valve 77, which performs preliminary pressure regulation on the medium.

[0047] The opening of the first slave interface 781 and the second slave interface 782, the opening of the main first interface 741 and the main second interface 742, and the closing of the main third interface 743 and the slave third interface 783 enable the medium to smoothly pass through the check valve and enter the capsule. At this time, the pressure gauge monitors and displays the pressure value after the balance valve in real time. According to actual needs, the conventional balance valve is adjusted to realize accurate control of the medium pressure.

[0048] After the setting is completed, in order to quickly release the high-pressure steam or nitrogen in the capsule, the state of the three-way cut valve 74 and the branch three-way cut valve 78 needs to be switched. The opening of the main second interface 742 and the main third interface 743, and the opening of the slave second interface 782 and the slave third interface 783, and the closing of the first slave interface 781 and the second slave interface 782, and the main first interface 741 and the main second interface 742 enable the high-pressure steam or high-pressure nitrogen / overheated water to enter the capsule. At this time, the pressure gauge after the conventional balance valve 77 is in communication with the atmosphere, and the pressure gauge value is zero, otherwise the equipment will abnormally alarm.

[0049] The new self-balancing valve 72 is provided with a pressure measuring interface, which can directly connect a pressure gauge. During the setting stage, the pressure gauge measures the pressure after the valve, and real-time pressure regulation is performed. After the setting stage is completed, the balance valve automatically releases pressure, and the pressure gauge value is zero.

[0050] As shown in Figure 7 Because the service life of the tire curing machine capsule is relatively short, it needs to be replaced with a new capsule after curing about 300-500 tires. The new capsule is relatively hard, and normal nitrogen setting pressure cannot well set the tire. The first 50 tires (determined according to the actual situation on site) or so are set by steam (steam heat, the capsule becomes soft after being heated, and setting is better), and the tires cured later are set by nitrogen. This situation can be realized by using the new self-balancing valve.

[0051] The second filter 76 is installed between the first filter 71 and the new self-balancing valve 72.

[0052] The first filter 71 is connected to the setting nitrogen, and the second filter 76 is connected to the setting steam.

[0053] It should be noted that the three-way cut valve and the capsule of the embodiment are general standard parts or components known to those skilled in the art, and their structure and principle can be known by those skilled in the art through technical manuals or through conventional experimental methods.

[0054] The application has been described above by way of example, but is not limited to the specific embodiments described above, any modifications or variations made on the basis of the application falling within the scope of the application as claimed.

Claims

1. A novel self-operated balancing valve, characterized in that: The valve body includes a valve body (1), a diaphragm assembly (3), and a second valve core assembly (4). A fixing plate (17) is disposed within the valve body (1), dividing the valve body (1) into a first chamber and a first flow chamber (13). The diaphragm assembly (3) is disposed within the valve body (1), dividing the first chamber into a signal chamber (16) and a control chamber (14). The valve body (1) has a medium inlet (11) and a medium outlet (12). The first flow chamber (13) connects the medium inlet (11) and the medium outlet (12). A first valve seat (21) is fixedly connected within the valve body (1). The core (22) is disposed in the first flow chamber (13) and is used to cooperate with the first valve seat (21) to control the opening and closing of the medium inlet (11) to the medium outlet (12); the signal chamber (16) has an input port (161) which is connected to an external signal pressure source; the control chamber (14) is connected to the medium outlet (12) through the feedback tube (15); the second valve core assembly (4) is coaxially disposed on the diaphragm assembly (3); the diaphragm assembly (3) responds to the pressure difference between the signal chamber (16) and the control chamber (14) and drives the first valve core (22) and the second valve core assembly (4) to move.

2. The novel self-operated balancing valve according to claim 1, characterized in that: The second valve core assembly (4) includes a second valve seat (41) and a second valve core (42). A base (6) is provided at the bottom of the valve body (1). A pressure relief hole (411) is provided on the second valve seat (41). A first pressure relief channel (431) leading to the base (6) is provided on the second valve core (42). The second valve seat (41) and the second valve core (42) cooperate to achieve the shut-off between the first flow chamber (13) and the first pressure relief channel (431).

3. A novel self-operated balancing valve according to claim 2, characterized in that: The bottom of the second valve core (42) is fixed to the valve stem (43). The valve stem (43) has an axially penetrating first pressure relief channel (431). The valve stem (43) coaxially passes through the central through hole of the first valve core (22). The bottom of the valve stem (43) is equipped with a second spring (44), which abuts against the inner wall of the base (6).

4. A novel self-operated balancing valve according to claim 2, characterized in that: The diaphragm assembly (3) includes a first partition (31) and a first diaphragm (32). The first diaphragm (32) is made of an elastic material and is disposed on the first partition (31). A pressure relief baffle (33) is slidably connected inside the second valve seat (41). A first valve seat flow channel (401) and a second valve seat flow channel (402) are disposed inside the second valve seat (41). The first valve seat flow channel (401) is connected to the first pressure relief channel (431), and the second valve seat flow channel (402) is connected to the pressure relief hole (411). A first spring (34) abuts against the pressure relief baffle (33). The first spring (34) applies elastic force to the pressure relief baffle (33) to connect or disconnect the passage between the valve seat flow channel (401) and the valve seat second flow channel (402).

5. A novel self-operated balancing valve according to claim 4, characterized in that: A first filter screen (51) is provided on the medium inlet (11), a second filter screen (52) is provided in the first flow chamber (13), and a third filter screen (53) is provided in the second flow channel (402) of the valve seat.

6. A novel self-operated balancing valve according to claim 2, characterized in that: The base (6) is provided with a second partition (61), and a second diaphragm (62) is provided on the second partition (61).

7. A novel self-operated balancing valve according to claim 2, characterized in that: The pressure relief hole (411) is a spherical hole.

8. A novel self-operated balancing valve according to claim 1, characterized in that: A first sealing ring (81) is provided between the valve body (1) and the second valve seat (41), a second sealing ring (82) is provided between the valve body (1) and the first valve seat (21), and a third sealing ring (83) is provided between the valve body (1) and the base (6).

9. A piping assembly, characterized in that: It includes a first filter (71) connected in sequence by pipelines, a novel self-regulating balancing valve (72) as described in any one of claims 1 to 8, a check valve (73), a three-way shut-off valve (74), and a ball valve (75).

10. A piping assembly according to claim 9, characterized in that: A second filter (76) is installed between the first filter (71) and the novel self-regulating balancing valve (72).

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