High-pressure and high-temperature block valve with integral double-closing type double-insurance structure

Abstract

The invention relates to the technical field of block valves, and discloses a high-pressure and high-temperature block valve with an integral double-closing type double-insurance structure, which solves the problem that the medium isolation effect of the existing block valve is poor, and comprises a valve body, an inlet pipe and an outlet pipe are fixedly connected to the two sides of the valve body respectively, and a sealing mechanism is arranged on the valve body. A discharging mechanism is arranged at the bottom of the valve body, the sealing mechanism comprises two sliding rods symmetrically fixed in the valve body, two sliding plates are symmetrically and movably connected between the two sliding rods in a sleeving mode, the bottoms of the two sliding plates are fixedly connected with plugging discs, two inner pipes are symmetrically and fixedly connected in the valve body, and the inlet pipe and the outlet pipe communicate with the two inner pipes correspondingly; according to the sealing device, the two first conical blocks can be conveniently separated from each other to be attached to the two sealing rings, the two sealing lips can be tightly attached to the two plugging discs under the action of the elastic force of the spring, and therefore the medium isolation effect can be conveniently improved through two seals.

Description

Technical Field

[0001] This invention belongs to the field of shut-off valve technology, specifically a high-pressure, high-temperature shut-off valve with an integral double-closing, double-insurance structure. Background Technology

[0002] Shut-off valves are a type of valve that completely cuts off or opens the pipeline medium passage by raising, rotating, or sliding the opening and closing elements. They are core control components used in fluid transportation systems for medium distribution, process switching, and safety isolation. They are widely used in petrochemical, oil and gas storage and transportation, thermal power and nuclear power and other fields. According to their structure, they can be divided into gate valves, globe valves, ball valves, butterfly valves and other types. The core performance requirements are high sealing reliability, low opening and closing torque, and wide range of adaptability to working conditions. Among them, high pressure and high temperature shut-off valves must also have the ability to withstand extreme pressure. They are key equipment to ensure system safety under high-risk working conditions.

[0003] In the traditional high-pressure and high-temperature shut-off valve technology system, the mainstream products are mostly single-seal structure designs, that is, the medium is isolated by forming a sealing pair with a set of valve seats and opening and closing parts. This structure has long occupied the industrial valve market due to mature technology and low manufacturing cost. However, under actual high-pressure and high-temperature conditions, the sealing reliability of a single sealing pair depends entirely on the fitting accuracy of a single sealing surface. Once the sealing surface is damaged due to medium erosion, high-temperature deformation or particle wear, it will directly lead to medium leakage. The leakage of high-pressure and high-temperature media can easily cause major safety accidents such as fire and explosion. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides an integral double-closing double-insurance high-pressure high-temperature shut-off valve, which effectively solves the problem of poor media isolation effect of current shut-off valves.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an integral double-closing double-insurance high-pressure high-temperature shut-off valve, comprising a valve body, wherein an inlet pipe and an outlet pipe are fixedly connected to both sides of the valve body respectively, a sealing mechanism is provided on the valve body, and a venting mechanism is provided at the bottom of the valve body;

[0006] The sealing mechanism includes two slide rods symmetrically fixed inside the valve body. Two sliding plates are symmetrically and movably connected between the two slide rods. A sealing disc is fixedly connected to the bottom of each of the two sliding plates. Two inner tubes are symmetrically and fixedly connected inside the valve body. The inlet pipe and outlet pipe are respectively connected to the two inner tubes. A sealing ring is fixedly connected to the end of each of the two inner tubes that are close to each other. The two sealing discs are located between the two inner tubes. An outer ring is fixedly sleeved on the outside of the inner tube. A sealing lip is fixedly connected to the outside of the outer ring.

[0007] Preferably, a support is fixedly installed on the top of the valve body, a drive motor is fixedly installed on the inner side of the support, a drive shaft is fixedly connected to the drive motor, the bottom end of the drive shaft extends into the valve body and is fixedly connected to a chassis located between two slide plates, the drive shaft is located between two slide rods, and the chassis is located below the two slide rods. Two movable rods are rotatably connected at equal angles to the bottom of the chassis, and the ends of the two movable rods away from the chassis are rotatably connected to the two slide plates respectively. A sealed bearing is provided on the top of the valve body, and the sealed bearing is sleeved on the outside of the drive shaft.

[0008] Preferably, a second conical block is fixedly connected to the side of each of the two sealing discs that is far apart from each other, and a first conical block is fixedly connected to the side of each of the two sealing discs that is close to each other.

[0009] Preferably, the outer ring and the valve body are fixedly connected at equal angles by multiple support pillars, and each support pillar is movably sleeved with a movable ring. A limiting ring is provided on the outer side of the sealing lip. The limiting ring and the movable ring are fixedly connected at equal angles by multiple connecting pillars. The movable ring and the outer ring are fixedly connected at equal angles by multiple springs, and each spring is sleeved on the outer side of each support pillar.

[0010] Preferably, the venting mechanism includes a bottom frame fixed to the bottom of the valve body, the bottom frame being in communication with the valve body, a movable block being movably sleeved inside the bottom frame, an inner frame being fixedly connected inside the bottom frame, a sealing gasket being fixedly connected to the bottom of the inner frame, the top of the movable block being in contact with the sealing gasket, and an inclined vent being provided on the side of the bottom frame, the inclined vent being located below the sealing gasket.

[0011] Preferably, two L-shaped round rods are symmetrically fixedly connected between the bottom frame and the valve body, a lifting plate is movably sleeved between the two L-shaped round rods, and a connecting plate is fixedly connected between the lifting plate and the movable block.

[0012] Preferably, a top plate is fixedly sleeved between the two L-shaped round rods, an electric push rod is fixedly installed at the bottom of the top plate, and the top of the lifting plate is fixed to the output end of the electric push rod.

[0013] Preferably, both of the L-shaped round rods are fixedly sleeved with abutment rings on their outer sides, and the lifting plate is located above the two abutment rings.

[0014] Preferably, two inclined plates are symmetrically fixedly connected to the inner bottom wall of the valve body, and two inclined plates are symmetrically fixedly connected between the two inclined plates.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. In this invention, the chassis can be rotated by starting the drive motor, which facilitates the two conical blocks to move away from each other and fit into the two sealing rings respectively. Under the action of the spring force, the two sealing lips can be tightly attached to the two sealing discs respectively, thereby facilitating the improvement of the medium isolation effect through two seals.

[0017] 2. This invention can drive the movable block downward by activating the electric push rod, so that the bottom frame can communicate with the outside through the inclined vent, thereby making it easier to determine whether the entire shut-off valve is leaking.

[0018] 3. The invention facilitates the complete discharge of leaked medium from the bottom frame and the inclined vent through the guiding effect of inclined plate one and inclined plate two. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0020] In the attached diagram:

[0021] Figure 1 This is a schematic diagram of the overall double-closing, double-insurance high-pressure, high-temperature shut-off valve structure of the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of the valve body of the present invention;

[0023] Figure 3 This is a schematic diagram of the sealing mechanism of the present invention;

[0024] Figure 4 This is a schematic diagram of the inner tube structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the discharge mechanism of the present invention;

[0026] Figure 6 This is a schematic diagram of the cross-sectional structure of the bottom frame of the present invention.

[0027] In the diagram: 1. Valve body; 2. Sealing mechanism; 201. Slide rod; 202. Inner tube; 203. Conical block one; 204. Chassis; 205. Movable rod; 206. Sealing disc; 207. Conical block two; 208. Slide plate; 209. Support; 2010. Drive shaft; 2011. Drive motor; 2012. Sealed bearing; 2013. Support column; 2014. Spring; 2015. Outer ring; 2016. Sealing ring; 2017. 1. Sealing lip; 2. Limiting ring; 2. Connecting column; 2. Moving ring; 3. Discharge mechanism; 3. Bottom frame; 3. Moving block; 3. L-shaped round rod; 3. Connecting plate; 3. Abutment ring; 3. Lifting plate; 3. Electric push rod; 3. Top plate; 3. Sealing gasket; 3. Inner frame; 3. Inclined discharge port; 4. Inlet pipe; 5. Outlet pipe; 6. Inclined plate one; 7. Inclined plate two. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] Example 1, by Figures 1-6 The present invention relates to an integral double-closing double-insurance high-pressure high-temperature shut-off valve, comprising a valve body 1, an inlet pipe 4 and an outlet pipe 5 fixedly connected to both sides of the valve body 1 respectively, a sealing mechanism 2 provided on the valve body 1, and a venting mechanism 3 provided at the bottom of the valve body 1.

[0030] In Embodiment 2, based on Embodiment 1, the sealing mechanism 2 includes two slide rods 201 symmetrically fixed inside the valve body 1. Two sliding plates 208 are symmetrically and movably connected between the two slide rods 201. A sealing disc 206 is fixedly connected to the bottom of each of the two sliding plates 208. Two inner tubes 202 are symmetrically fixedly connected inside the valve body 1. An inlet pipe 4 and an outlet pipe 5 communicate with the two inner tubes 202 respectively. A sealing ring 2016 is fixedly connected to one end of each inner tube 202 that is close to the other. The two sealing discs 206 are located between the two inner tubes 202. An outer ring 2015 is fixedly fitted on the outside, and a sealing lip 2017 is fixedly connected to the outside of the outer ring 2015. A support 209 is fixedly installed on the top of the valve body 1, and a drive motor 2011 is fixedly installed on the inner side of the support 209. A drive shaft 2010 is fixedly connected to the drive motor 2011. The bottom end of the drive shaft 2010 extends into the valve body 1 and is fixedly connected to a chassis 204 located between two slide bars 208. The drive shaft 2010 is located between two slide rods 201, and the chassis 204 is located below the two slide rods 201. The bottom of the chassis 204 is at an equiangular angle. Two movable rods 205 are rotatably connected. The ends of the two movable rods 205 away from the chassis 204 are respectively rotatably connected to two sliding plates 208. A sealing bearing 2012 is provided on the top of the valve body 1. The sealing bearing 2012 is sleeved on the outside of the drive shaft 2010. The sealing bearing 2012 is used to ensure the sealing performance of the valve body 1. Conical blocks 207 are fixedly connected to the two sealing discs 206 on the side away from each other, and conical blocks 203 are fixedly connected to the side of the two sealing discs 206 close to each other. Conical blocks 203 and 207 are used to prevent the medium from passing through. The sealing disc 206 is directly impacted, while reducing additional flow resistance. Multiple support pillars 2013 are fixedly connected at equal angles between the outer ring 2015 and the valve body 1. A movable ring 2020 is movably sleeved between each support pillar 2013. A limiting ring 2018 is provided on the outside of the sealing lip 2017. Multiple connecting pillars 2019 are fixedly connected at equal angles between the limiting ring 2018 and the movable ring 2020. Multiple springs 2014 are fixedly connected at equal angles between the movable ring 2020 and the outer ring 2015. Each spring 2014 is respectively sleeved on the outside of each support pillar 2013.

[0031] First, the drive motor 2011 is started, driving the drive shaft 2010 to rotate, which in turn drives the chassis 204 to rotate. Through the two movable rods 205, the two slide plates 208 slide along the two sliding rods 201 respectively, while the two sealing discs 206 move away from each other. When the two sealing discs 206 contact the two sealing lips 2017 respectively, they continue to move, pushing the sealing lips 2017 and the limit ring 2018. Through the connecting pillars 2019, the movable ring 2020 slides along the pillars 2013. At this time, the springs 2014 are deformed, so that the sealing lips 2017 are pressed tightly against the sealing discs 206 under the elastic force of the springs 2014, until the sealing discs 206 move to fit against the sealing rings 2016. Thus, the medium is isolated through two seals, achieving a double-locking and double-insurance effect.

[0032] In Embodiment 3, based on Embodiment 1, the venting mechanism 3 includes a bottom frame 301 fixed to the bottom of the valve body 1. The bottom frame 301 is connected to the valve body 1. A movable block 302 is movably sleeved inside the bottom frame 301. An inner frame 3010 is fixedly connected inside the bottom frame 301. The inner wall of the inner frame 3010 is inclined to guide the flow of the medium. A sealing gasket 309 is fixedly connected to the bottom of the inner frame 3010. The top of the movable block 302 fits against the sealing gasket 309. The sealing gasket 309 is used to ensure the sealing between the movable block 302 and the inner frame 3010. An inclined vent 3011 is provided on the side of the bottom frame 301. The inclined vent 3011 is located below the sealing gasket 309. Two symmetrical vents are fixedly connected between the bottom frame 301 and the valve body 1. L-shaped round rods 303, with a lifting plate 306 movably sleeved between the two L-shaped round rods 303, and a connecting plate 304 fixedly connected between the lifting plate 306 and the movable block 302. A top plate 308 is fixedly sleeved between the two L-shaped round rods 303, and an electric push rod 307 is fixedly installed at the bottom of the top plate 308. The top of the lifting plate 306 is fixedly mounted on the output end of the electric push rod 307. Abutment rings 305 are fixedly sleeved on the outer sides of the two L-shaped round rods 303. The lifting plate 306 is located above the two abutment rings 305. When the lifting plate 306 moves downward to abut against the two abutment rings 305, the top surface of the movable block 302 is flush with the upper bottom end of the inclined discharge port 3011, which facilitates the discharge of the medium from the inclined discharge port 3011.

[0033] First, start the electric push rod 307, which drives the lifting plate 306 to slide downward along the two L-shaped round rods 303. Through the connecting plate 304, the movable block 302 moves downward, causing the movable block 302 to separate from the sealing gasket 309 until the bottom frame 301 is connected to the outside through the inclined vent 3011. At this time, the residual medium in the valve body 1 can be discharged from the bottom frame 301 and the inclined vent 3011. After the residual medium is completely discharged and left to stand for a period of time, observe whether there is any medium discharged from the inclined vent 3011, so as to make it easier to judge whether the entire shut-off valve has leaked.

[0034] In Example 4, based on Example 1, two inclined plates 1-6 are symmetrically fixedly connected to the inner bottom wall of the valve body 1, and two inclined plates 2-7 are symmetrically fixedly connected between the two inclined plates 1-6.

[0035] Inclined plate 6 and inclined plate 7 are used to guide the flow of the medium, so that the medium in the valve body 1 can be completely discharged from the bottom frame 301 and the inclined discharge port 3011.

Claims

1. A high-pressure, high-temperature shut-off valve with an integral double-closing, double-safety structure, comprising a valve body (1), characterized in that: The valve body (1) is fixedly connected to an inlet pipe (4) and an outlet pipe (5) on both sides respectively. The valve body (1) is provided with a sealing mechanism (2) and a discharge mechanism (3) at the bottom. The sealing mechanism (2) includes two slide rods (201) symmetrically fixed inside the valve body (1). Two slide plates (208) are symmetrically and movably connected between the two slide rods (201). A sealing disc (206) is fixedly connected to the bottom of each of the two slide plates (208). Two inner tubes (202) are symmetrically and fixedly connected inside the valve body (1). The inlet pipe (4) and outlet pipe (5) are respectively connected to the two inner tubes (202). A sealing ring (2016) is fixedly connected to the end of each inner tube (202) that is close to each other. The two sealing discs (206) are located between the two inner tubes (202). An outer ring (2015) is fixedly connected to the outside of the inner tube (202). A sealing lip (2017) is fixedly connected to the outside of the outer ring (2015).

2. The high-pressure, high-temperature shut-off valve with an integral double-closing, double-insurance structure according to claim 1, characterized in that: A support (209) is fixedly installed on the top of the valve body (1). A drive motor (2011) is fixedly installed on the inner side of the support (209). A drive shaft (2010) is fixedly connected to the drive motor (2011). The bottom end of the drive shaft (2010) extends into the valve body (1) and is fixedly connected to a chassis (204) located between two slides (208). The drive shaft (2010) is located between two slide rods (201), and the chassis (204) is located below the two slide rods (201). Two movable rods (205) are rotatably connected at equal angles at the bottom of the chassis (204). The ends of the two movable rods (205) away from the chassis (204) are rotatably connected to the two slides (208) respectively. A sealed bearing (2012) is provided on the top of the valve body (1). The sealed bearing (2012) is sleeved on the outside of the drive shaft (2010).

3. The high-pressure, high-temperature shut-off valve with an integral double-closing, double-insurance structure according to claim 1, characterized in that: Conical block two (207) is fixedly connected to the side of the two sealing discs (206) that are far apart from each other, and conical block one (203) is fixedly connected to the side of the two sealing discs (206) that are close to each other.

4. The high-pressure, high-temperature shut-off valve with an integral double-closing, double-safety structure according to claim 1, characterized in that: Multiple support pillars (2013) are fixedly connected at equal angles between the outer ring (2015) and the valve body (1). A movable ring (2020) is movably sleeved between each support pillar (2013). A limiting ring (2018) is provided on the outer side of the sealing lip (2017). Multiple connecting pillars (2019) are fixedly connected at equal angles between the limiting ring (2018) and the movable ring (2020). Multiple springs (2014) are fixedly connected at equal angles between the movable ring (2020) and the outer ring (2015). Each spring (2014) is sleeved on the outer side of each support pillar (2013).

5. The high-pressure, high-temperature shut-off valve with an integral double-closing, double-insurance structure according to claim 1, characterized in that: The venting mechanism (3) includes a bottom frame (301) fixed to the bottom of the valve body (1). The bottom frame (301) is connected to the valve body (1). A movable block (302) is movably sleeved inside the bottom frame (301). An inner frame (3010) is fixedly connected inside the bottom frame (301). A sealing gasket (309) is fixedly connected to the bottom of the inner frame (3010). The top of the movable block (302) is in contact with the sealing gasket (309). An inclined vent (3011) is provided on the side of the bottom frame (301). The inclined vent (3011) is located below the sealing gasket (309).

6. The high-pressure, high-temperature shut-off valve with an integral double-closing, double-insurance structure according to claim 5, characterized in that: Two L-shaped round rods (303) are symmetrically fixedly connected between the bottom frame (301) and the valve body (1). A lifting plate (306) is movably sleeved between the two L-shaped round rods (303). A connecting plate (304) is fixedly connected between the lifting plate (306) and the movable block (302).

7. The high-pressure, high-temperature shut-off valve with an integral double-closing, double-insurance structure according to claim 6, characterized in that: A top plate (308) is fixedly sleeved between the two L-shaped round rods (303). An electric push rod (307) is fixedly installed at the bottom of the top plate (308), and the top of the lifting plate (306) is fixed to the output end of the electric push rod (307).

8. The high-pressure, high-temperature shut-off valve with an integral double-closing, double-safety structure according to claim 6, characterized in that: Both of the L-shaped round rods (303) are fixedly sleeved with abutment rings (305) on their outer sides, and the lifting plate (306) is located above the two abutment rings (305).

9. The high-pressure, high-temperature shut-off valve with an integral double-closing, double-insurance structure according to claim 1, characterized in that: Two inclined plates (6) are symmetrically fixedly connected to the inner bottom wall of the valve body (1), and two inclined plates (7) are symmetrically fixedly connected between the two inclined plates (6).

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