Large-caliber high-pressure-difference three-way regulating valve with differential pressure impact prevention protection structure

Abstract

According to the large-diameter high-pressure-difference three-way regulating valve with the differential pressure impact prevention protection structure, in the flowing process of a medium in the three-way regulating valve, firstly, valve rod structures in an upper valve sleeve and a lower valve sleeve are improved into an assembly valve rod and an inner valve rod, and the assembly valve rod and the inner valve rod are used for controlling the opening degree of an upper valve element and the opening degree of the lower valve sleeve; on the basis, the upper balloon, the middle balloon and the lower balloon are further optimized, the upper balloon and the lower balloon are used for monitoring the medium flowing pressure at the upper valve element and the lower valve sleeve in real time and used for monitoring the pressure difference in the medium flowing process in real time, and the middle balloon serves as a pressure bearing structure of the upper balloon and the lower balloon and used for monitoring the pressure difference in the medium flowing process in real time. And the fluid pressure of a medium in the valve body is monitored in real time, a pressure balance system is established according to the air pressure changes in the upper balloon, the middle balloon and the lower balloon, and the damage degree caused by the pressure difference of the high fluctuation state at the upper valve element and the lower valve sleeve is reduced in a correlation restriction mode.

Description

Technical Field

[0001] The invention relates to the technical field of three-way regulating valves, and in particular to a large-caliber, high-pressure-difference three-way regulating valve with a pressure-difference impact protection structure. Background Art

[0002] The regulating valve is mainly used to change the flow state of fluid (gas, liquid) medium, including two-way, three-way and even multi-way. Taking the three-way regulating valve as an example, it can simultaneously meet the flow state of the medium in two passages. Please refer to the relevant contents in publication numbers CN114542742A and CN109323010A.

[0003] It should be noted that medium pressure is one of the key factors affecting the operation of the valve body. On the basis of constant medium pressure, the medium flow state is changed by changing the opening between the valve core and the valve body. When the medium pressure fluctuates significantly, especially in the process of changing the opening, the medium pressure (pressure difference) borne by the valve core structure increases significantly, thereby increasing the workload of the valve core structure, resulting in reduced sealing performance between the valve core structure and the valve body or even no sealing ability. For the three-way valve body structure, the medium flow states in the two passages interfere with each other, which will also indirectly affect the medium pressure in the two passages, and the pressure difference on both sides of the valve core structure at the corresponding passage will fluctuate more.

[0004] This application proposes a solution to this problem. Summary of the invention

[0005] The purpose of the present invention is to provide a large-diameter, high-pressure differential three-way regulating valve with a pressure differential impact protection structure. During the operation of the regulating valve, on the one hand, the pressure of the medium itself fluctuates, and on the other hand, at the moment when the valve core structure changes its opening, a large pressure differential is generated at the valve core structure, which increases the workload of the valve core structure and affects its sealing performance. In particular, for the three-way regulating valve, the flow states of the media in the two passages interfere with each other, and the pressure differential on both sides of the valve core structure at the corresponding passages has a larger fluctuation state.

[0006] The object of the present invention can be achieved by the following technical scheme: a large-caliber high-pressure differential three-way regulating valve with a pressure differential impact protection structure comprises a valve body, a pneumatic control assembly and an assembly valve stem, a medium channel 1 and a medium channel 2 are arranged inside the valve body, an upper valve sleeve and an upper valve core are arranged in the medium channel 1, and a lower valve sleeve is arranged in the medium channel 2; The lower end of the assembly valve stem is connected to the upper valve core, and an inner valve stem is slidably installed in the assembly valve stem. The lower end of the inner valve stem is connected to the lower valve sleeve, and an upper balloon, a middle balloon and a lower balloon are installed in sequence along the inner valve stem and the assembly valve stem from top to bottom.

[0007] It is further configured as follows: the upper valve sleeve and the lower valve sleeve are arranged in a direction from top to bottom, the upper valve core is slidably connected in the upper valve sleeve through an assembly valve stem, flow holes are opened on the outer walls of the upper valve sleeve and the lower valve sleeve, and the lower valve sleeve is slidably connected in a vertical direction inside the valve body through an inner valve stem.

[0008] It is further configured as follows: the setting position of the upper balloon corresponds to the setting position of the flow port on the upper valve sleeve, the lower balloon is set on the lower side of the lower valve sleeve, and the middle balloon is set in the middle position between the upper valve sleeve and the lower valve sleeve.

[0009] It is further configured as follows: the assembly valve stem and the inner valve stem are arranged at the output end position of the pneumatic control assembly, the interior of the lower balloon is communicated with the inner valve stem, and the outer circle diameter of the lower balloon corresponds to the inner diameter of the lower valve sleeve.

[0010] It is further configured as follows: the middle balloon is installed at the intersection of the assembly valve stem and the inner valve stem, and the upper balloon is installed on the assembly valve stem.

[0011] It is further configured as follows: a vent hole 1 is opened on the outer wall of the inner valve stem corresponding to the middle balloon, and a vent hole 2 is opened on the outer wall of the assembly valve stem and the inner valve stem corresponding to the upper balloon.

[0012] It is further configured as follows: during use, a pressure balance system is provided through the pneumatic control assembly, in which the pressure balance system obtains the air pressure changes in the upper balloon, the middle balloon and the lower balloon in real time, and sets the opening of the upper valve core and the lower valve sleeve according to the air pressure changes in the upper balloon, the middle balloon and the lower balloon.

[0013] The present invention has the following beneficial effects: 1. For the medium flow process in the three-way regulating valve, the overall valve stem structure is first optimized. The valve stem structure is based on the assembly valve stem and the inner valve stem. The assembly valve stem and the inner valve stem respectively drive the upper valve core and the lower valve sleeve to slide in a directional manner, so as to change the opening changes in the medium channel one and the medium channel two. The key content is to set an upper balloon, a middle balloon and a lower balloon for the assembly valve stem and the inner valve stem. The lower balloon and the upper balloon are respectively set at the medium flow points in the corresponding medium channel two and the medium channel one, so that the pressure difference changes in the medium flow process are fed back in real time through the air pressure changes in the lower balloon and the upper balloon. Specifically, the middle balloon bears the air pressure changes in the upper balloon and the lower balloon at the same time, so it can be directly understood that the pressure difference changes at the upper valve sleeve and the lower valve sleeve are shared by the middle balloon; 2. Based on the above content, the middle balloon is located in the middle position of the medium channel, and it mainly bears the liquid pressure generated by the medium fluid. Therefore, it can be understood that the operation process of the valve body is mainly distributed by the liquid pressure of the medium fluid to share the pressure difference changes at the upper valve sleeve and the lower valve sleeve. The key content is: according to the air pressure changes in the upper balloon, the middle balloon and the lower balloon, a pressure balance system is established. When sharing the pressure difference changes at the upper valve sleeve and the lower valve sleeve, the opening of the upper valve core and the lower valve sleeve is controlled in a mutually related constraint manner, thereby reducing the degree of damage to the upper valve core and the lower valve sleeve caused by the high fluctuation state of the pressure difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a structural schematic diagram of a large-caliber, high-pressure differential three-way regulating valve with a pressure differential impact protection structure proposed by the present invention; Figure 2 The invention provides a large-diameter, high-pressure differential three-way regulating valve with a pressure differential impact protection structure. Figure 1 A cross-sectional view of Figure 3 The invention provides a large-diameter, high-pressure differential three-way regulating valve with a pressure differential impact protection structure. Figure 1 sectional view of Figure 4 The invention provides a large-diameter, high-pressure differential three-way regulating valve with a pressure differential impact protection structure. Figure 3 Split diagram of ; Figure 5 A cross-sectional view of an upper valve sleeve and a lower valve sleeve in a large-caliber, high-pressure differential three-way regulating valve with a pressure differential impact protection structure proposed by the present invention; Figure 6 This is a cross-sectional view of the assembly valve stem and the inner valve stem in the large-caliber, high-pressure differential three-way regulating valve with a pressure differential impact protection structure proposed by the present invention.

[0016] In the figure: 1. Pneumatic control assembly; 2. Assembly valve stem; 3. Valve body; 4. Upper valve core; 5. Upper valve sleeve; 6. Lower valve sleeve; 7. Lower ball balloon; 8. Middle ball balloon; 9. Upper ball balloon; 10. Inner valve stem. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1: In the operation process of the regulating valve, on the one hand, the pressure of the medium itself fluctuates, and on the other hand, at the moment when the valve core structure changes its opening, a large pressure difference is generated at the valve core structure, which increases the workload of the valve core structure and affects its sealing performance. Especially for the three-way regulating valve, the flow states of the media in the two passages interfere with each other, and the pressure difference on both sides of the valve core structure at the corresponding passage has a larger fluctuation state. The following technical solution is proposed: Reference Figures 1 to 6 The large-caliber high-pressure differential three-way regulating valve with a pressure differential impact protection structure in this embodiment includes a valve body 3, a pneumatic control assembly 1 and an assembly valve stem 2. A medium channel 1 and a medium channel 2 are arranged inside the valve body 3. An upper valve sleeve 5 and an upper valve core 4 are arranged in the medium channel 1. A lower valve sleeve 6 is arranged in the medium channel 2. The lower end of the assembly valve stem 2 is connected to the upper valve core 4, and an inner valve stem 10 is slidably installed in the assembly valve stem 2, and the lower end of the inner valve stem 10 is connected to the lower valve sleeve 6. The upper balloon 9, the middle balloon 8 and the lower balloon 7 are sequentially installed on the inner valve stem 10 and the assembly valve stem 2 from top to bottom; The upper valve sleeve 5 and the lower valve sleeve 6 are arranged in the direction from top to bottom, the upper valve core 4 is slidably connected in the upper valve sleeve 5 through the assembly valve stem 2, and flow holes are opened on the outer walls of the upper valve sleeve 5 and the lower valve sleeve 6. The lower valve sleeve 6 is slidably connected in the vertical direction inside the valve body 3 through the inner valve stem 10. The setting position of the upper ball balloon 9 corresponds to the setting position of the flow hole on the upper valve sleeve 5, the lower ball balloon 7 is set on the lower side of the lower valve sleeve 6, and the middle ball balloon 8 is set in the middle position between the upper valve sleeve 5 and the lower valve sleeve 6.

[0019] Basic principle: For the operating principle of the three-way regulating valve, Figure 2 To illustrate, the left side of the valve body 3 is used as the medium injection end, and can flow out through the medium channel 1 and the medium channel 2 respectively. In the overall process, the opening process in the medium channel 1 and the medium channel 2 is changed by the vertical movement process of the upper valve core 4 and the lower valve sleeve 6. Specifically, the upper valve sleeve 5 is relatively fixed to the valve body 5. When the upper valve core 4 moves up and down, the flow port in the upper valve sleeve 5 is partially exposed to realize the flow state of the medium. The specific structural layout of the upper valve sleeve 5, the lower valve sleeve 6 and the upper valve core 4 is not described in detail in the present invention. It should be noted that: when the flow port in the upper valve sleeve 5 is partially exposed, the medium is quickly connected through the flow port. In this process, on the one hand, if the medium pressure itself is relatively large, on the other hand, because the flow port on the upper valve sleeve 5 is instantly opened, the medium flows in the form of instantaneous impact, so there are differences in the medium flow state at the upper valve core 4, which is specifically manifested as follows: The relatively fast medium flow rate causes a large pressure difference to be generated at both sides of the upper valve core 4. Similarly, a large pressure difference will also be generated at the lower valve sleeve 6. The overall process is also based on the connection state of the medium channel 1 and the medium channel 2, such as the medium channel 1 at the upper valve sleeve 4 is opened but the medium channel 2 of the lower valve sleeve 6 is in a closed state, the medium channel 1 at the upper valve sleeve 4 is in a closed state but the medium channel 2 of the lower valve sleeve 6 is opened, and the medium channel 1 and the medium channel 2 are both in a closed state or a connected state; In addition, when the opening difference in the medium channel 1 or the medium channel 2 will also affect the pressure difference at the upper valve core 4 or the lower valve sleeve 6, the present invention specifically sets the upper balloon 9, the middle balloon 8 and the lower balloon 7 according to the structural position of the assembly valve stem 2 and the inner valve stem 10. In essence, the upper balloon 9, the middle balloon 8 and the lower balloon 7 have a certain pressure by filling a certain amount of gas through the inner valve stem; In this process, all three will be subjected to the liquid pressure from the medium itself, especially at the middle balloon 8, but the difference is: when the medium channel is in a connected state, because the medium quickly passes through the flow port on the upper valve sleeve 5, the pressure on the upper balloon 9 is significantly greater than the liquid pressure of the medium itself, so that part of the gas in the upper balloon 9 will be squeezed into the middle balloon 8. The purpose is: the pressure difference change generated at the upper valve sleeve 5 is specifically borne by the middle balloon 8, thereby reducing the workload of the upper valve sleeve 5 and the lower valve core 4 due to the pressure difference.

[0020] Embodiment 2: The operation of the valve stem assembly and the inner valve stem in Embodiment 1 is described as follows: The assembly valve stem 2 and the inner valve stem 10 are arranged at the output end of the pneumatic control assembly 1, the interior of the lower balloon 7 is connected to the inner valve stem 10, and the outer circle diameter of the lower balloon 7 corresponds to the inner diameter of the lower valve sleeve 6, the middle balloon 8 is installed at the intersection of the assembly valve stem 2 and the inner valve stem 10, the upper balloon 9 is installed on the assembly valve stem 2, and a vent 1 corresponding to the middle balloon 8 is opened on the outer wall of the inner valve stem 10, and a vent 2 is opened on the outer wall of the assembly valve stem 2 and the inner valve stem 10 corresponding to the upper balloon 9.

[0021] Solution Description: Refer to Figure 5 and Figure 6For explanation, the assembly valve stem 2 can drive the upper valve core 4 to slide in the vertical direction, while the inner valve stem 10 and the assembly valve stem 2 keep sliding, and the assembly valve stem 2 and the inner valve stem 10 are specifically controlled by the pneumatic control assembly 1, such as: the pneumatic control assembly 1 is provided with a driving structure associated with the assembly valve stem 2 and the inner valve stem 10, which is not explained in this part; It should be noted that the lower balloon 7 is always located in the inner position of the lower valve sleeve 6, and the outer diameter of the lower balloon 7 is ensured to correspond to the inner diameter of the lower valve sleeve 6. The essence is that the lower balloon 7 is deformed and expanded outward under pressure, ensuring that the outer curved surface of the lower balloon 7 contacts the inner wall of the lower valve sleeve 6, and the setting positions of the upper balloon 9 and the lower balloon 7 are only related to the assembly valve stem 2 and the inner valve stem 10 respectively, so the deformation process of the two is only related to the flow state of the medium, and the middle balloon 8 is connected to the intersection of the assembly valve stem 2 and the inner valve stem 10; When adjusting the opening of the upper valve core 3 and the lower valve sleeve 6, the assembly valve stem 2 and the inner valve stem 10 thereof maintain an upward movement state. If the upper valve core 3 and the lower valve sleeve 6 move up and down by the same distance, the middle balloon 8 will not produce an obvious "extra deformation process", and will only deform through the medium liquid pressure. However, if there is a difference in the up and down movement distances of the upper valve core 3 and the lower valve sleeve 6, the middle balloon 8 will produce an obvious "extra deformation process"; In addition, it should be noted that: when there is a difference in the opening of the medium channel 1 and the medium channel 2, the pressure difference between the upper valve core 3 and the lower valve sleeve 6 will also change, but the key content of the overall invention is: when the medium flows through the upper balloon 9 and the lower balloon 7, the medium pressures borne by the upper balloon 9 and the lower balloon 7 are different, but eventually, due to the deformation process of the upper balloon 9 and the lower balloon 7, part of the gas inside them is pressed into the middle balloon 8, which will cause the middle balloon 8 to further expand and deform outward; However, because the middle balloon 8 is also affected by the pressure from the medium liquid and tends to deform inward, this can be directly understood as: when the opening of the upper valve core 3 and the lower valve sleeve 6 changes, the resulting pressure difference change is mainly shared by the middle balloon 8, avoiding excessive workload on the upper valve core 3 and the lower valve sleeve 6.

[0022] Embodiment 3: The following supplementary explanation is provided in combination with Embodiment 1 and Embodiment 2: During use, a pressure balance system is provided through the pneumatic control assembly 1. In the pressure balance system, the air pressure changes in the upper balloon 9, the middle balloon 8 and the lower balloon 7 are obtained in real time, and the opening of the upper valve core 4 and the lower valve sleeve 6 are set according to the air pressure changes in the upper balloon 9, the middle balloon 8 and the lower balloon 7.

[0023] Program Description: Figure 6For explanation, the upper balloon 9, the middle balloon 8 and the lower balloon 7 are connected through the inner valve stem, the vent 1 and the vent 2, so it can be understood that the air pressure changes inside the upper balloon 9, the middle balloon 8 and the lower balloon 7 should be kept consistent, but the distribution positions of the upper balloon 9, the middle balloon 8 and the lower balloon 7 are different as shown below: S1: When the medium channel 1 and the medium channel 2 are both in a closed state, the upper balloon 9 and the middle balloon 8 are both subjected to the liquid pressure from the medium and deform inwards, while the lower balloon is not in contact with the medium, but is affected by the upper balloon 9 and the middle balloon 8 and deforms outwards, the purpose of which is to initially balance the pressure of the medium itself; S2: When the medium channel 1 is in a closed state and the medium channel 2 is in a connected state, especially at the moment when the lower valve sleeve 6 adjusts its opening, the upper balloon 9 and the middle balloon 8 are mainly affected by the medium liquid pressure, but the key is that the lower balloon 7 produces an inward deformation process due to the pressure difference problem, which will cause the upper balloon 9 and the middle balloon 8 to "accept" the air pressure change in the lower balloon 7 and produce an outward deformation trend. This method aims to maintain the pressure balance at the lower valve sleeve 6; S3: Based on S2, when the medium channel 2 is in a closed state and the medium channel 1 is in a connected state, the upper balloon 9 bears the pressure change of the corresponding medium channel 1, and is further shared by the lower balloon 7, which is specifically manifested as the lower balloon 7 showing a deformation trend toward the outside. This method aims to maintain the pressure balance at the upper valve core 3; S4: When medium channel one and medium channel two are in a connected state and medium channel one and medium channel two change their openings at the same time, the upper balloon 9 and the lower balloon 7 respectively cooperate with the medium flow mode in medium channel one and medium channel two to produce an inward deformation trend, but the key is that the pressure changes borne by the upper balloon 9 and the lower balloon 7 are mainly transferred to the middle balloon 8, so that the middle balloon 8 shows an outward deformation trend and further cooperates with the liquid pressure of the medium itself. The purpose of this method is to maintain the pressure balance mode in medium channel one and medium channel two at the same time.

[0024] In summary: during the flow of medium in the three-way regulating valve, the valve stem structure of the upper valve sleeve and the lower valve sleeve is first improved into an assembly valve stem and an inner valve stem. The assembly valve stem and the inner valve stem are used to control the opening of the upper valve core and the lower valve sleeve. On this basis, the upper balloon, the middle balloon and the lower balloon are further optimized. The upper balloon and the lower balloon are respectively used to monitor the medium flow pressure at the upper valve core and the lower valve sleeve in real time, and are used to monitor the pressure difference during the medium flow process in real time. The middle balloon serves as the pressure-bearing structure of the upper balloon and the lower balloon, and monitors the fluid pressure of the medium in the valve body in real time. A pressure balance system is established according to the air pressure changes in the upper balloon, the middle balloon and the lower balloon, so as to reduce the degree of damage caused by the pressure difference in the high fluctuation state at the upper valve core and the lower valve sleeve in a mutually related and restraining manner.

[0025] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A large-caliber, high-pressure differential three-way regulating valve with a pressure differential impact protection structure, comprising a valve body (3), a pneumatic control assembly (1) and an assembly valve stem (2), characterized in that: A medium channel 1 and a medium channel 2 are arranged inside the valve body (3); an upper valve sleeve (5) and an upper valve core (4) are arranged in the medium channel 1, and a lower valve sleeve (6) is arranged in the medium channel 2; The lower end of the assembly valve stem (2) is connected to the upper valve core (4), and an inner valve stem (10) is slidably installed in the assembly valve stem (2). The lower end of the inner valve stem (10) is connected to the lower valve sleeve (6), and an upper balloon (9), a middle balloon (8) and a lower balloon (7) are installed in sequence from top to bottom on the upper edge of the inner valve stem (10) and the assembly valve stem (2).

2. The large-caliber, high-pressure differential three-way regulating valve with a pressure differential impact protection structure according to claim 1 is characterized in that: The upper valve sleeve (5) and the lower valve sleeve (6) are arranged in a direction from top to bottom, the upper valve core (4) is slidably connected in the upper valve sleeve (5) through the assembly valve stem (2), flow holes are opened on the outer walls of the upper valve sleeve (5) and the lower valve sleeve (6), and the lower valve sleeve (6) is slidably connected in a vertical direction inside the valve body (3) through the inner valve stem (10).

3. The large-caliber, high-pressure differential three-way regulating valve with a pressure differential impact protection structure according to claim 2 is characterized in that: The upper balloon (9) is arranged at a position corresponding to the position of the flow opening on the upper valve sleeve (5), the lower balloon (7) is arranged at a lower side position of the lower valve sleeve (6), and the middle balloon (8) is arranged at a middle position between the upper valve sleeve (5) and the lower valve sleeve (6).

4. The large-caliber, high-pressure differential three-way regulating valve with a pressure differential impact protection structure according to claim 2 is characterized in that: The assembly valve stem (2) and the inner valve stem (10) are arranged at the output end of the pneumatic control assembly (1), the interior of the lower ball balloon (7) is connected to the inner valve stem (10), and the outer diameter of the lower ball balloon (7) corresponds to the inner diameter of the lower valve sleeve (6).

5. The large-caliber, high-pressure differential three-way regulating valve with a pressure differential impact protection structure according to claim 1 is characterized in that: The middle balloon (8) is installed at the intersection of the assembly valve stem (2) and the inner valve stem (10), and the upper balloon (9) is installed on the assembly valve stem (2).

6. The large-caliber, high-pressure differential three-way regulating valve with a pressure differential impact protection structure according to claim 5, characterized in that: A vent hole 1 is provided on the outer wall of the inner valve stem (10) corresponding to the middle balloon (8), and a vent hole 2 is provided on the outer wall of the assembly valve stem (2) and the inner valve stem (10) corresponding to the upper balloon (9).

7. The large-caliber, high-pressure differential three-way regulating valve with a pressure differential impact protection structure according to any one of claims 1 to 6, characterized in that: During use, a pressure balance system is provided through the pneumatic control assembly (1). The pressure balance system obtains the air pressure changes in the upper balloon (9), the middle balloon (8) and the lower balloon (7) in real time, and sets the opening of the upper valve core (4) and the lower valve sleeve (6) according to the air pressure changes in the upper balloon (9), the middle balloon (8) and the lower balloon (7).

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