Three-way valve body with emergency sealing structure

Abstract

A three-way valve body with an emergency sealing structure belongs to the technical field of three-way valve bodies and comprises a valve body, a sealing partition plate A and two sealing partition plates B are fixedly mounted in the valve body and divide an inner cavity of the valve body into an air inlet cavity and a mixing cavity, two through holes are formed in the upper surface of the sealing partition plate A in a penetrating mode, and the two through holes are communicated with the air inlet cavity and the mixing cavity. The two ports are used for communicating with the corresponding air inlet cavities correspondingly, electric execution power sources are installed in the air inlet cavities in a penetrating mode correspondingly, pressing plates are fixedly installed on the lower surfaces of the electric execution units correspondingly, sealing rings are fixedly installed on the lower surfaces of the pressing plates, and sealing bases are fixedly installed at the ports in the upper surface of the sealing partition plate A; a plurality of contact rings are integrally formed on the upper surface of the sealing base, a plurality of adaptive grooves are formed in the lower surface of the sealing ring, the conical contact rings and the adaptive grooves can be utilized to form multi-stage sealing of multiple contact surfaces, and compared with a traditional single sealing ring, the pressure resistance and the sealing performance of the sealing structure are greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of three-way valve body technology, specifically relating to a three-way valve body with an emergency sealing structure. Background Technology

[0002] In industrial fluid control systems, the three-way valve body, as a core component for realizing fluid diversion, merging, and flow direction switching, is widely used in petrochemical, water supply and drainage, and gas transmission fields. Currently, most three-way valve bodies on the market use a single sealing ring for sealing. Although this structure has a certain sealing effect, its sealing capacity is limited. Once the sealing ring has minor local defects or its elasticity decreases after long-term use, leakage is likely to occur, affecting the normal use of the valve body.

[0003] Furthermore, existing three-way valves typically use electronic actuators as the driving component, controlling the opening and closing of the valve core via electrical signals to switch fluid passages. However, in practical applications, electronic actuators are highly susceptible to failure due to electromagnetic interference, circuit faults, power outages, and other factors. When an electronic actuator fails, the valve port cannot close properly, and fluid will continue to enter the system, potentially leading to serious consequences such as pipeline overpressure and equipment damage, posing a significant threat to the safe and stable operation of the entire industrial system. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a three-way valve body with an emergency sealing structure to solve the problem that the existing three-way valve body is prone to leakage once the sealing ring has a local minor defect or its elasticity decreases after long-term use, which affects the normal use of the valve body.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A three-way valve body with an emergency sealing structure includes a valve body. A sealing partition A and two sealing partitions B are fixedly installed inside the valve body. The sealing partition A and the two sealing partitions B divide the inner cavity of the valve body into two air inlet chambers and a mixing chamber. Each of the two air inlet chambers and the mixing chamber has a through-hole, and a flange is fixedly installed at each through-hole. Two through-holes are formed on the upper surface of the sealing partition A, and each through-hole communicates with a corresponding air inlet chamber. An electric actuator is installed through-hole in each air inlet chamber. A pressure plate is fixedly installed on the lower surface of each electric actuator, and a sealing ring is fixedly installed on the lower surface of the pressure plate. A sealing base is fixedly installed at the through-hole on the upper surface of the sealing partition A, located directly below the sealing ring. Multiple contact rings are integrally formed on the upper surface of the sealing base, and multiple adapter grooves are formed on the lower surface of the sealing ring. The size of the adapter grooves matches the size of the contact rings. An emergency sealing structure for temporarily sealing the through-holes is installed inside the valve body.

[0007] In the above technical solution, the cross-section of the contact ring is tapered.

[0008] In the above technical solution, the emergency sealing structure includes a support plate, which is rotatably installed in the mixing chamber. A sealing gasket is fixedly installed on the upper surface of the support plate. Two connecting ports are opened through the sealing gasket and the support plate. After rotating around the center of the support plate, the connecting ports are located below the connecting ports. A shaft is fixedly installed at the center of the upper surface of the support plate. The shaft passes through the sealing gasket and is rotatably installed between the sealing partition A and the valve body. A handwheel is fixedly installed through the upper surface of the valve body at the top of the shaft.

[0009] In the above technical solution, a sleeve block is fixedly installed on the upper outer surface of the shaft. Arrow marks are symmetrically arranged on the upper surface of the sleeve block. The arrow marks are arranged parallel to the connecting port, and the position of the arrow marks corresponds to the position of the connecting port.

[0010] In the above technical solution, a positioning bolt is threaded through and screwed onto the upper surface of the sleeve block, and a positioning block is fixedly installed on the upper surface of the valve body. The upper surface of the positioning block is provided with threaded hole A and threaded hole B, and both threaded hole A and threaded hole B are located on the path of the positioning bolt rotating around the shaft.

[0011] The three-way valve body with an emergency sealing structure of this utility model has the following advantages compared with the prior art:

[0012] I. This utility model, by setting a sealing ring with an adapter groove and a sealing base with a contact ring between the pressure plate and the opening of the sealing partition A in the electric actuator, can form a multi-level seal with multiple contact surfaces using the conical contact ring and the adapter groove. Compared with the traditional single sealing ring, this greatly enhances the pressure resistance and sealing performance of the sealing structure. It effectively avoids leakage problems caused by sealing ring defects or decreased elasticity, reduces the risk of media leakage caused by seal failure, ensures the sealing performance and safety of the fluid control system, and reduces maintenance costs and downtime.

[0013] II. By setting up an emergency sealing structure, when the electric actuator fails due to electromagnetic interference, circuit failure, or other factors, the operator can manually turn the handwheel to drive the tray and sealing gasket to rotate, causing the connecting port and the outlet to be misaligned. This achieves rapid sealing of the passage from the air inlet chamber to the mixing chamber, effectively preventing fluid from continuing to enter the system, preventing serious consequences such as pipeline overpressure and equipment damage, ensuring the safe and stable operation of the industrial system under sudden failures, and significantly improving the system's emergency response capability and reliability. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the main structure of this utility model.

[0015] Figure 2 is a cross-sectional structural diagram of this utility model.

[0016] Figure 3 is a schematic cross-sectional view of the sealing base of this utility model.

[0017] Figure 4 is a detailed view of point a in Figure 2.

[0018] Figure 5 shows a detail view of point b in Figure 2.

[0019] Figure 6 is a schematic diagram of the emergency sealing structure of this utility model.

[0020] Figure 7 is a top view of the valve body structure of this utility model.

[0021] In Figures 1-7, the components are: 1. Valve body; 11. Sealing partition A; 111. Port; 12. Mixing chamber; 13. Sealing partition B; 14. Air inlet chamber; 15. Positioning block; 151. Threaded hole A; 152. Threaded hole B; 2. Electric actuator; 3. Pressure plate; 31. Sealing ring; 311. Adapter groove; 4. Sealing base; 41. Contact ring; 5. Emergency sealing structure; 51. Support plate;

[0022] 52. Sealing gasket; 53. Connecting port; 54. Shaft; 55. Sleeve block; 551. Positioning bolt. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In this embodiment, the front, back, left, right, top, and bottom are described with reference to Figure 1. Please refer to Figure 1- Figure 7 This utility model provides a technical solution:

[0025] A three-way valve body with an emergency sealing structure includes a valve body 1. A sealing partition A11 and two sealing partitions B13 are fixedly installed inside the valve body 1. The sealing partition A11 and the two sealing partitions B13 divide the inner cavity of the valve body 1 into two air inlet chambers 14 and a mixing chamber 12. Two through-holes 111 are opened through the upper surface of the sealing partition A11. The two through-holes 111 are used to communicate with the corresponding air inlet chambers 14. A flow port is opened through the two air inlet chambers 14 and the mixing chamber 12. A flange is fixedly installed at each flow port.

[0026] An electric actuator 2 is installed through each air intake chamber 14. The electric actuator 2 is an electric telescopic rod. The lower end of the electric actuator 2 is set in the corresponding air intake chamber 14, and a pressure plate 3 is fixedly installed on the lower surface of the electric actuator 2. A sealing ring 31 is fixedly installed on the lower surface of the pressure plate 3. A sealing base 4 is fixedly installed at the opening 111 on the upper surface of the sealing partition A11. The sealing base 4 is located directly below the sealing ring 31, and multiple contact rings 41 are integrally formed on the upper surface of the sealing base 4. The cross-section of the contact ring 41 is conical. The lower surface of the sealing ring 31 is provided with an adapter groove 311. When the pressure plate 3 is driven down by the electric actuator 2, the lower surface of the sealing ring 31 fits against the upper surface of the sealing base 4, and the contact ring 41 is inserted into the corresponding adapter groove 311 to form a multi-level seal with multiple contact surfaces, which enhances the pressure resistance of the sealing structure and greatly improves the overall sealing performance. The tapered geometry can evenly distribute external pressure (such as the thrust of the electric actuator 2 or the internal pressure of the medium) to the contact surface, avoiding local stress concentration that could cause deformation or damage to the sealing ring or contact ring. The root of the tapered contact ring 41 (the part connected to the sealing base 4) has a larger cross-sectional area, making it more resistant to bending and impact, and more suitable for long-term stable operation under high pressure conditions.

[0027] It is worth noting that an emergency sealing structure 5 is installed in the mixing chamber 12. The emergency sealing structure 5 includes a support plate 51 with the same diameter as the mixing chamber 12. A sealing gasket 52 is fixedly installed on the upper surface of the support plate 51. The upper surface of the sealing gasket 52 is in contact with the lower surface of the sealing partition A11. Two symmetrical through-holes 53 are opened between the sealing gasket 52 and the support plate 51. When the support plate 51 rotates in the mixing chamber 12, the through-holes 53 can be located below the through-hole 111. A shaft 54 ​​is fixedly installed at the center of the upper surface of the support plate 51. The shaft 54 ​​is located between the two sealing partitions B13 and passes through the sealing gasket 52. The shaft 54 ​​is rotatably installed between the sealing partition A11 and the valve body 1 through a sealing bearing. A handwheel is fixedly installed on the upper surface of the valve body 1 through the top of the shaft 54.

[0028] When the electric actuator malfunctions, the handwheel is manually operated to drive the shaft 54 ​​to rotate, which in turn rotates the support plate 51 and the sealing gasket 52, causing the connecting port 53 and the outlet 111 to be misaligned. The sealing gasket 52 and the support plate 51 seal the outlet 111, preventing fluid from entering the mixing chamber 12 from the two air inlet chambers 14 for mixing. This effectively controls the fluid flow, prevents continuous fluid inflow into the system, and avoids risks such as pipeline overpressure and equipment damage.

[0029] In addition, to enable visual identification of the position of the connection port 53 of the emergency sealing structure 5, a sleeve 55 is fixedly installed on the upper outer surface of the shaft 54 ​​extending from the valve body 1. Arrow markings are symmetrically arranged on the upper surface of the sleeve 55, and these markings correspond parallel to the connection port 53, indicating its location. During manual adjustment of the shaft 54 ​​to drive the support plate 51 and sealing gasket 52, the operator can intuitively and quickly determine the real-time position of the connection port 53 through the arrow markings, significantly improving the convenience and accuracy of adjusting the position of the connection port 53.

[0030] Finally, to ensure the stable positioning of the support plate 51 and the sealing gasket 52 and to prevent accidental rotation from affecting the sealing or flow function, a positioning and fastening mechanism was designed. A through-bolt positioning bolt 551 is provided on the upper surface of the sleeve block 55, and a positioning block 15 is fixed at the center of the upper surface of the valve body 1. The shaft 54 ​​passes through the positioning block 15, and the upper surface of the positioning block 15 is provided with threaded holes A151 and B152. Both threaded holes A151 and B152 are located on the path of the positioning bolt 551 rotating about the shaft 54.

[0031] By manually rotating the shaft 54, the sleeve 55 rotates synchronously, thereby adjusting the position of the positioning bolt 551 above the threaded holes A151 and B152. When the lower end of the positioning bolt 551 is screwed into the threaded hole A151, it can securely lock the misalignment of the connecting port 53 and the through port 111, ensuring structural stability during emergency sealing and preventing the sealing state from changing due to external interference. When the lower end of the positioning bolt 551 is screwed into the threaded hole B152, it can reliably fix the connection state of the connecting port 53 and the through port 111, avoiding accidental obstruction that affects the normal flow of fluid and ensuring the reliability and safety of system operation.

Claims

1. A three-way valve body with an emergency sealing structure, comprising a valve body (1), wherein a sealing partition A (11) and two sealing partitions B (13) are fixedly installed inside the valve body (1), the sealing partition A (11) and the two sealing partitions B (13) dividing the inner cavity of the valve body (1) into two air inlet chambers (14) and a mixing chamber (12), and each of the two air inlet chambers (14) and the mixing chamber (12) is provided with a flow port, and a flange is fixedly installed at each flow port, characterized in that, The upper surface of the sealing partition A (11) has two through openings (111), which are used to communicate with the corresponding air intake chambers (14). Each air intake chamber (14) is equipped with an electric actuator (2). Each electric actuator (2) has a pressure plate (3) fixedly installed on its lower surface. A sealing ring (31) is fixedly installed on the lower surface of the pressure plate (3). A sealing base (4) is fixedly installed at the through opening (111) on the upper surface of the sealing partition A (11). The sealing base (4) is located directly below the sealing ring (31). The upper surface of the sealing base (4) is integrally formed with multiple contact rings (41). The lower surface of the sealing ring (31) is provided with multiple adapter grooves (311). The size of the adapter grooves (311) matches the size of the contact rings (41). An emergency sealing structure (5) for temporarily sealing the through opening (111) is installed inside the valve body (1).

2. The three-way valve body with emergency sealing structure according to claim 1, characterized in that, The contact ring (41) has a tapered cross section.

3. The three-way valve body with emergency sealing structure according to claim 2, characterized in that, The emergency sealing structure (5) includes a support plate (51), which is rotatably installed in the mixing chamber (12). A sealing gasket (52) is fixedly installed on the upper surface of the support plate (51). Two connecting ports (53) are opened between the sealing gasket (52) and the support plate (51). After the connecting ports (53) rotate around the center of the support plate (51), they are located below the opening (111). A shaft (54) is fixedly installed at the center of the upper surface of the support plate (51). The shaft (54) passes through the sealing gasket (52) and is rotatably installed between the sealing partition A (11) and the valve body (1). A handwheel is fixedly installed on the upper surface of the valve body (1) through the top of the shaft (54).

4. The three-way valve body with emergency sealing structure according to claim 3, characterized in that, A sleeve (55) is fixedly installed on the upper outer surface of the shaft (54). Arrow marks are symmetrically arranged on the upper surface of the sleeve (55). The arrow marks are parallel to the connecting port (53), and the position of the arrow marks corresponds to the position of the connecting port (53).

5. The three-way valve body with emergency seal structure according to claim 4, characterized in that, The upper surface of the sleeve (55) is threaded with a positioning bolt (551), and the upper surface of the valve body (1) is fixedly installed with a positioning block (15). The upper surface of the positioning block (15) is provided with a threaded hole A (151) and a threaded hole B (152). The threaded hole A (151) and the threaded hole B (152) are both located on the path of the positioning bolt (551) rotating around the shaft (54).

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